Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6

Conflicts:

	fs/cifs/export.c

416 files changed, 20865 insertions, 13374 deletions

diff --git a/fs/9p/9p.h b/fs/9p/9p.h
deleted file mode 100644
index 94e2f92..0000000
--- a/fs/9p/9p.h
+++ /dev/null
@@ -1,375 +0,0 @@
-/*
- * linux/fs/9p/9p.h
- *
- * 9P protocol definitions.
- *
- *  Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
- *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
- */
-
-/* Message Types */
-enum {
-	TVERSION = 100,
-	RVERSION,
-	TAUTH = 102,
-	RAUTH,
-	TATTACH = 104,
-	RATTACH,
-	TERROR = 106,
-	RERROR,
-	TFLUSH = 108,
-	RFLUSH,
-	TWALK = 110,
-	RWALK,
-	TOPEN = 112,
-	ROPEN,
-	TCREATE = 114,
-	RCREATE,
-	TREAD = 116,
-	RREAD,
-	TWRITE = 118,
-	RWRITE,
-	TCLUNK = 120,
-	RCLUNK,
-	TREMOVE = 122,
-	RREMOVE,
-	TSTAT = 124,
-	RSTAT,
-	TWSTAT = 126,
-	RWSTAT,
-};
-
-/* modes */
-enum {
-	V9FS_OREAD = 0x00,
-	V9FS_OWRITE = 0x01,
-	V9FS_ORDWR = 0x02,
-	V9FS_OEXEC = 0x03,
-	V9FS_OEXCL = 0x04,
-	V9FS_OTRUNC = 0x10,
-	V9FS_OREXEC = 0x20,
-	V9FS_ORCLOSE = 0x40,
-	V9FS_OAPPEND = 0x80,
-};
-
-/* permissions */
-enum {
-	V9FS_DMDIR = 0x80000000,
-	V9FS_DMAPPEND = 0x40000000,
-	V9FS_DMEXCL = 0x20000000,
-	V9FS_DMMOUNT = 0x10000000,
-	V9FS_DMAUTH = 0x08000000,
-	V9FS_DMTMP = 0x04000000,
-	V9FS_DMSYMLINK = 0x02000000,
-	V9FS_DMLINK = 0x01000000,
-	/* 9P2000.u extensions */
-	V9FS_DMDEVICE = 0x00800000,
-	V9FS_DMNAMEDPIPE = 0x00200000,
-	V9FS_DMSOCKET = 0x00100000,
-	V9FS_DMSETUID = 0x00080000,
-	V9FS_DMSETGID = 0x00040000,
-};
-
-/* qid.types */
-enum {
-	V9FS_QTDIR = 0x80,
-	V9FS_QTAPPEND = 0x40,
-	V9FS_QTEXCL = 0x20,
-	V9FS_QTMOUNT = 0x10,
-	V9FS_QTAUTH = 0x08,
-	V9FS_QTTMP = 0x04,
-	V9FS_QTSYMLINK = 0x02,
-	V9FS_QTLINK = 0x01,
-	V9FS_QTFILE = 0x00,
-};
-
-#define V9FS_NOTAG	(u16)(~0)
-#define V9FS_NOFID	(u32)(~0)
-#define V9FS_MAXWELEM	16
-
-/* ample room for Twrite/Rread header (iounit) */
-#define V9FS_IOHDRSZ	24
-
-struct v9fs_str {
-	u16 len;
-	char *str;
-};
-
-/* qids are the unique ID for a file (like an inode */
-struct v9fs_qid {
-	u8 type;
-	u32 version;
-	u64 path;
-};
-
-/* Plan 9 file metadata (stat) structure */
-struct v9fs_stat {
-	u16 size;
-	u16 type;
-	u32 dev;
-	struct v9fs_qid qid;
-	u32 mode;
-	u32 atime;
-	u32 mtime;
-	u64 length;
-	struct v9fs_str name;
-	struct v9fs_str uid;
-	struct v9fs_str gid;
-	struct v9fs_str muid;
-	struct v9fs_str extension;	/* 9p2000.u extensions */
-	u32 n_uid;		/* 9p2000.u extensions */
-	u32 n_gid;		/* 9p2000.u extensions */
-	u32 n_muid;		/* 9p2000.u extensions */
-};
-
-/* file metadata (stat) structure used to create Twstat message
-   The is similar to v9fs_stat, but the strings don't point to
-   the same memory block and should be freed separately
-*/
-struct v9fs_wstat {
-	u16 size;
-	u16 type;
-	u32 dev;
-	struct v9fs_qid qid;
-	u32 mode;
-	u32 atime;
-	u32 mtime;
-	u64 length;
-	char *name;
-	char *uid;
-	char *gid;
-	char *muid;
-	char *extension;	/* 9p2000.u extensions */
-	u32 n_uid;		/* 9p2000.u extensions */
-	u32 n_gid;		/* 9p2000.u extensions */
-	u32 n_muid;		/* 9p2000.u extensions */
-};
-
-/* Structures for Protocol Operations */
-
-struct Tversion {
-	u32 msize;
-	struct v9fs_str version;
-};
-
-struct Rversion {
-	u32 msize;
-	struct v9fs_str version;
-};
-
-struct Tauth {
-	u32 afid;
-	struct v9fs_str uname;
-	struct v9fs_str aname;
-};
-
-struct Rauth {
-	struct v9fs_qid qid;
-};
-
-struct Rerror {
-	struct v9fs_str error;
-	u32 errno;		/* 9p2000.u extension */
-};
-
-struct Tflush {
-	u16 oldtag;
-};
-
-struct Rflush {
-};
-
-struct Tattach {
-	u32 fid;
-	u32 afid;
-	struct v9fs_str uname;
-	struct v9fs_str aname;
-};
-
-struct Rattach {
-	struct v9fs_qid qid;
-};
-
-struct Twalk {
-	u32 fid;
-	u32 newfid;
-	u16 nwname;
-	struct v9fs_str wnames[16];
-};
-
-struct Rwalk {
-	u16 nwqid;
-	struct v9fs_qid wqids[16];
-};
-
-struct Topen {
-	u32 fid;
-	u8 mode;
-};
-
-struct Ropen {
-	struct v9fs_qid qid;
-	u32 iounit;
-};
-
-struct Tcreate {
-	u32 fid;
-	struct v9fs_str name;
-	u32 perm;
-	u8 mode;
-	struct v9fs_str extension;
-};
-
-struct Rcreate {
-	struct v9fs_qid qid;
-	u32 iounit;
-};
-
-struct Tread {
-	u32 fid;
-	u64 offset;
-	u32 count;
-};
-
-struct Rread {
-	u32 count;
-	u8 *data;
-};
-
-struct Twrite {
-	u32 fid;
-	u64 offset;
-	u32 count;
-	u8 *data;
-};
-
-struct Rwrite {
-	u32 count;
-};
-
-struct Tclunk {
-	u32 fid;
-};
-
-struct Rclunk {
-};
-
-struct Tremove {
-	u32 fid;
-};
-
-struct Rremove {
-};
-
-struct Tstat {
-	u32 fid;
-};
-
-struct Rstat {
-	struct v9fs_stat stat;
-};
-
-struct Twstat {
-	u32 fid;
-	struct v9fs_stat stat;
-};
-
-struct Rwstat {
-};
-
-/*
-  * fcall is the primary packet structure
-  *
-  */
-
-struct v9fs_fcall {
-	u32 size;
-	u8 id;
-	u16 tag;
-	void *sdata;
-
-	union {
-		struct Tversion tversion;
-		struct Rversion rversion;
-		struct Tauth tauth;
-		struct Rauth rauth;
-		struct Rerror rerror;
-		struct Tflush tflush;
-		struct Rflush rflush;
-		struct Tattach tattach;
-		struct Rattach rattach;
-		struct Twalk twalk;
-		struct Rwalk rwalk;
-		struct Topen topen;
-		struct Ropen ropen;
-		struct Tcreate tcreate;
-		struct Rcreate rcreate;
-		struct Tread tread;
-		struct Rread rread;
-		struct Twrite twrite;
-		struct Rwrite rwrite;
-		struct Tclunk tclunk;
-		struct Rclunk rclunk;
-		struct Tremove tremove;
-		struct Rremove rremove;
-		struct Tstat tstat;
-		struct Rstat rstat;
-		struct Twstat twstat;
-		struct Rwstat rwstat;
-	} params;
-};
-
-#define PRINT_FCALL_ERROR(s, fcall) dprintk(DEBUG_ERROR, "%s: %.*s\n", s, \
-	fcall?fcall->params.rerror.error.len:0, \
-	fcall?fcall->params.rerror.error.str:"");
-
-int v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize,
-		   char *version, struct v9fs_fcall **rcall);
-
-int v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname,
-		  u32 fid, u32 afid, struct v9fs_fcall **rcall);
-
-int v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid);
-
-int v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid,
-		struct v9fs_fcall **rcall);
-
-int v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid,
-		 struct v9fs_wstat *wstat, struct v9fs_fcall **rcall);
-
-int v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid,
-		char *name, struct v9fs_fcall **rcall);
-
-int v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode,
-		struct v9fs_fcall **rcall);
-
-int v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid,
-		  struct v9fs_fcall **rcall);
-
-int v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name,
-	u32 perm, u8 mode, char *extension, struct v9fs_fcall **rcall);
-
-int v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid,
-		u64 offset, u32 count, struct v9fs_fcall **rcall);
-
-int v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset,
-		 u32 count, const char __user * data,
-		 struct v9fs_fcall **rcall);
-int v9fs_printfcall(char *, int, struct v9fs_fcall *, int);
diff --git a/fs/9p/Makefile b/fs/9p/Makefile
index 87897f8..bc7f0d1 100644
--- a/fs/9p/Makefile
+++ b/fs/9p/Makefile
@@ -1,18 +1,12 @@
 obj-$(CONFIG_9P_FS) := 9p.o
 
 9p-objs := \
-	trans_fd.o \
-	mux.o \
-	fcall.o \
-	conv.o \
 	vfs_super.o \
 	vfs_inode.o \
 	vfs_addr.o \
 	vfs_file.o \
 	vfs_dir.o \
 	vfs_dentry.o \
-	error.o \
 	v9fs.o \
 	fid.o \
-	fcprint.o
 
diff --git a/fs/9p/conv.c b/fs/9p/conv.c
deleted file mode 100644
index a3ed571..0000000
--- a/fs/9p/conv.c
+++ /dev/null
@@ -1,845 +0,0 @@
-/*
- * linux/fs/9p/conv.c
- *
- * 9P protocol conversion functions
- *
- *  Copyright (C) 2004, 2005 by Latchesar Ionkov <lucho@ionkov.net>
- *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
- */
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/sched.h>
-#include <linux/idr.h>
-#include <asm/uaccess.h>
-#include "debug.h"
-#include "v9fs.h"
-#include "9p.h"
-#include "conv.h"
-
-/*
- * Buffer to help with string parsing
- */
-struct cbuf {
-	unsigned char *sp;
-	unsigned char *p;
-	unsigned char *ep;
-};
-
-static inline void buf_init(struct cbuf *buf, void *data, int datalen)
-{
-	buf->sp = buf->p = data;
-	buf->ep = data + datalen;
-}
-
-static inline int buf_check_overflow(struct cbuf *buf)
-{
-	return buf->p > buf->ep;
-}
-
-static int buf_check_size(struct cbuf *buf, int len)
-{
-	if (buf->p + len > buf->ep) {
-		if (buf->p < buf->ep) {
-			eprintk(KERN_ERR, "buffer overflow: want %d has %d\n",
-				len, (int)(buf->ep - buf->p));
-			dump_stack();
-			buf->p = buf->ep + 1;
-		}
-
-		return 0;
-	}
-
-	return 1;
-}
-
-static void *buf_alloc(struct cbuf *buf, int len)
-{
-	void *ret = NULL;
-
-	if (buf_check_size(buf, len)) {
-		ret = buf->p;
-		buf->p += len;
-	}
-
-	return ret;
-}
-
-static void buf_put_int8(struct cbuf *buf, u8 val)
-{
-	if (buf_check_size(buf, 1)) {
-		buf->p[0] = val;
-		buf->p++;
-	}
-}
-
-static void buf_put_int16(struct cbuf *buf, u16 val)
-{
-	if (buf_check_size(buf, 2)) {
-		*(__le16 *) buf->p = cpu_to_le16(val);
-		buf->p += 2;
-	}
-}
-
-static void buf_put_int32(struct cbuf *buf, u32 val)
-{
-	if (buf_check_size(buf, 4)) {
-		*(__le32 *)buf->p = cpu_to_le32(val);
-		buf->p += 4;
-	}
-}
-
-static void buf_put_int64(struct cbuf *buf, u64 val)
-{
-	if (buf_check_size(buf, 8)) {
-		*(__le64 *)buf->p = cpu_to_le64(val);
-		buf->p += 8;
-	}
-}
-
-static char *buf_put_stringn(struct cbuf *buf, const char *s, u16 slen)
-{
-	char *ret;
-
-	ret = NULL;
-	if (buf_check_size(buf, slen + 2)) {
-		buf_put_int16(buf, slen);
-		ret = buf->p;
-		memcpy(buf->p, s, slen);
-		buf->p += slen;
-	}
-
-	return ret;
-}
-
-static inline void buf_put_string(struct cbuf *buf, const char *s)
-{
-	buf_put_stringn(buf, s, strlen(s));
-}
-
-static u8 buf_get_int8(struct cbuf *buf)
-{
-	u8 ret = 0;
-
-	if (buf_check_size(buf, 1)) {
-		ret = buf->p[0];
-		buf->p++;
-	}
-
-	return ret;
-}
-
-static u16 buf_get_int16(struct cbuf *buf)
-{
-	u16 ret = 0;
-
-	if (buf_check_size(buf, 2)) {
-		ret = le16_to_cpu(*(__le16 *)buf->p);
-		buf->p += 2;
-	}
-
-	return ret;
-}
-
-static u32 buf_get_int32(struct cbuf *buf)
-{
-	u32 ret = 0;
-
-	if (buf_check_size(buf, 4)) {
-		ret = le32_to_cpu(*(__le32 *)buf->p);
-		buf->p += 4;
-	}
-
-	return ret;
-}
-
-static u64 buf_get_int64(struct cbuf *buf)
-{
-	u64 ret = 0;
-
-	if (buf_check_size(buf, 8)) {
-		ret = le64_to_cpu(*(__le64 *)buf->p);
-		buf->p += 8;
-	}
-
-	return ret;
-}
-
-static void buf_get_str(struct cbuf *buf, struct v9fs_str *vstr)
-{
-	vstr->len = buf_get_int16(buf);
-	if (!buf_check_overflow(buf) && buf_check_size(buf, vstr->len)) {
-		vstr->str = buf->p;
-		buf->p += vstr->len;
-	} else {
-		vstr->len = 0;
-		vstr->str = NULL;
-	}
-}
-
-static void buf_get_qid(struct cbuf *bufp, struct v9fs_qid *qid)
-{
-	qid->type = buf_get_int8(bufp);
-	qid->version = buf_get_int32(bufp);
-	qid->path = buf_get_int64(bufp);
-}
-
-/**
- * v9fs_size_wstat - calculate the size of a variable length stat struct
- * @stat: metadata (stat) structure
- * @extended: non-zero if 9P2000.u
- *
- */
-
-static int v9fs_size_wstat(struct v9fs_wstat *wstat, int extended)
-{
-	int size = 0;
-
-	if (wstat == NULL) {
-		eprintk(KERN_ERR, "v9fs_size_stat: got a NULL stat pointer\n");
-		return 0;
-	}
-
-	size =			/* 2 + *//* size[2] */
-	    2 +			/* type[2] */
-	    4 +			/* dev[4] */
-	    1 +			/* qid.type[1] */
-	    4 +			/* qid.vers[4] */
-	    8 +			/* qid.path[8] */
-	    4 +			/* mode[4] */
-	    4 +			/* atime[4] */
-	    4 +			/* mtime[4] */
-	    8 +			/* length[8] */
-	    8;			/* minimum sum of string lengths */
-
-	if (wstat->name)
-		size += strlen(wstat->name);
-	if (wstat->uid)
-		size += strlen(wstat->uid);
-	if (wstat->gid)
-		size += strlen(wstat->gid);
-	if (wstat->muid)
-		size += strlen(wstat->muid);
-
-	if (extended) {
-		size += 4 +	/* n_uid[4] */
-		    4 +		/* n_gid[4] */
-		    4 +		/* n_muid[4] */
-		    2;		/* string length of extension[4] */
-		if (wstat->extension)
-			size += strlen(wstat->extension);
-	}
-
-	return size;
-}
-
-/**
- * buf_get_stat - safely decode a recieved metadata (stat) structure
- * @bufp: buffer to deserialize
- * @stat: metadata (stat) structure
- * @extended: non-zero if 9P2000.u
- *
- */
-
-static void
-buf_get_stat(struct cbuf *bufp, struct v9fs_stat *stat, int extended)
-{
-	stat->size = buf_get_int16(bufp);
-	stat->type = buf_get_int16(bufp);
-	stat->dev = buf_get_int32(bufp);
-	stat->qid.type = buf_get_int8(bufp);
-	stat->qid.version = buf_get_int32(bufp);
-	stat->qid.path = buf_get_int64(bufp);
-	stat->mode = buf_get_int32(bufp);
-	stat->atime = buf_get_int32(bufp);
-	stat->mtime = buf_get_int32(bufp);
-	stat->length = buf_get_int64(bufp);
-	buf_get_str(bufp, &stat->name);
-	buf_get_str(bufp, &stat->uid);
-	buf_get_str(bufp, &stat->gid);
-	buf_get_str(bufp, &stat->muid);
-
-	if (extended) {
-		buf_get_str(bufp, &stat->extension);
-		stat->n_uid = buf_get_int32(bufp);
-		stat->n_gid = buf_get_int32(bufp);
-		stat->n_muid = buf_get_int32(bufp);
-	}
-}
-
-/**
- * v9fs_deserialize_stat - decode a received metadata structure
- * @buf: buffer to deserialize
- * @buflen: length of received buffer
- * @stat: metadata structure to decode into
- * @extended: non-zero if 9P2000.u
- *
- * Note: stat will point to the buf region.
- */
-
-int
-v9fs_deserialize_stat(void *buf, u32 buflen, struct v9fs_stat *stat,
-		int extended)
-{
-	struct cbuf buffer;
-	struct cbuf *bufp = &buffer;
-	unsigned char *p;
-
-	buf_init(bufp, buf, buflen);
-	p = bufp->p;
-	buf_get_stat(bufp, stat, extended);
-
-	if (buf_check_overflow(bufp))
-		return 0;
-	else
-		return bufp->p - p;
-}
-
-/**
- * deserialize_fcall - unmarshal a response
- * @buf: recieved buffer
- * @buflen: length of received buffer
- * @rcall: fcall structure to populate
- * @rcalllen: length of fcall structure to populate
- * @extended: non-zero if 9P2000.u
- *
- */
-
-int
-v9fs_deserialize_fcall(void *buf, u32 buflen, struct v9fs_fcall *rcall,
-		       int extended)
-{
-
-	struct cbuf buffer;
-	struct cbuf *bufp = &buffer;
-	int i = 0;
-
-	buf_init(bufp, buf, buflen);
-
-	rcall->size = buf_get_int32(bufp);
-	rcall->id = buf_get_int8(bufp);
-	rcall->tag = buf_get_int16(bufp);
-
-	dprintk(DEBUG_CONV, "size %d id %d tag %d\n", rcall->size, rcall->id,
-		rcall->tag);
-
-	switch (rcall->id) {
-	default:
-		eprintk(KERN_ERR, "unknown message type: %d\n", rcall->id);
-		return -EPROTO;
-	case RVERSION:
-		rcall->params.rversion.msize = buf_get_int32(bufp);
-		buf_get_str(bufp, &rcall->params.rversion.version);
-		break;
-	case RFLUSH:
-		break;
-	case RATTACH:
-		rcall->params.rattach.qid.type = buf_get_int8(bufp);
-		rcall->params.rattach.qid.version = buf_get_int32(bufp);
-		rcall->params.rattach.qid.path = buf_get_int64(bufp);
-		break;
-	case RWALK:
-		rcall->params.rwalk.nwqid = buf_get_int16(bufp);
-		if (rcall->params.rwalk.nwqid > V9FS_MAXWELEM) {
-			eprintk(KERN_ERR, "Rwalk with more than %d qids: %d\n",
-				V9FS_MAXWELEM, rcall->params.rwalk.nwqid);
-			return -EPROTO;
-		}
-
-		for (i = 0; i < rcall->params.rwalk.nwqid; i++)
-			buf_get_qid(bufp, &rcall->params.rwalk.wqids[i]);
-		break;
-	case ROPEN:
-		buf_get_qid(bufp, &rcall->params.ropen.qid);
-		rcall->params.ropen.iounit = buf_get_int32(bufp);
-		break;
-	case RCREATE:
-		buf_get_qid(bufp, &rcall->params.rcreate.qid);
-		rcall->params.rcreate.iounit = buf_get_int32(bufp);
-		break;
-	case RREAD:
-		rcall->params.rread.count = buf_get_int32(bufp);
-		rcall->params.rread.data = bufp->p;
-		buf_check_size(bufp, rcall->params.rread.count);
-		break;
-	case RWRITE:
-		rcall->params.rwrite.count = buf_get_int32(bufp);
-		break;
-	case RCLUNK:
-		break;
-	case RREMOVE:
-		break;
-	case RSTAT:
-		buf_get_int16(bufp);
-		buf_get_stat(bufp, &rcall->params.rstat.stat, extended);
-		break;
-	case RWSTAT:
-		break;
-	case RERROR:
-		buf_get_str(bufp, &rcall->params.rerror.error);
-		if (extended)
-			rcall->params.rerror.errno = buf_get_int16(bufp);
-		break;
-	}
-
-	if (buf_check_overflow(bufp)) {
-		dprintk(DEBUG_ERROR, "buffer overflow\n");
-		return -EIO;
-	}
-
-	return bufp->p - bufp->sp;
-}
-
-static inline void v9fs_put_int8(struct cbuf *bufp, u8 val, u8 * p)
-{
-	*p = val;
-	buf_put_int8(bufp, val);
-}
-
-static inline void v9fs_put_int16(struct cbuf *bufp, u16 val, u16 * p)
-{
-	*p = val;
-	buf_put_int16(bufp, val);
-}
-
-static inline void v9fs_put_int32(struct cbuf *bufp, u32 val, u32 * p)
-{
-	*p = val;
-	buf_put_int32(bufp, val);
-}
-
-static inline void v9fs_put_int64(struct cbuf *bufp, u64 val, u64 * p)
-{
-	*p = val;
-	buf_put_int64(bufp, val);
-}
-
-static void
-v9fs_put_str(struct cbuf *bufp, char *data, struct v9fs_str *str)
-{
-	int len;
-	char *s;
-
-	if (data)
-		len = strlen(data);
-	else
-		len = 0;
-
-	s = buf_put_stringn(bufp, data, len);
-	if (str) {
-		str->len = len;
-		str->str = s;
-	}
-}
-
-static int
-v9fs_put_user_data(struct cbuf *bufp, const char __user * data, int count,
-		   unsigned char **pdata)
-{
-	*pdata = buf_alloc(bufp, count);
-	return copy_from_user(*pdata, data, count);
-}
-
-static void
-v9fs_put_wstat(struct cbuf *bufp, struct v9fs_wstat *wstat,
-	       struct v9fs_stat *stat, int statsz, int extended)
-{
-	v9fs_put_int16(bufp, statsz, &stat->size);
-	v9fs_put_int16(bufp, wstat->type, &stat->type);
-	v9fs_put_int32(bufp, wstat->dev, &stat->dev);
-	v9fs_put_int8(bufp, wstat->qid.type, &stat->qid.type);
-	v9fs_put_int32(bufp, wstat->qid.version, &stat->qid.version);
-	v9fs_put_int64(bufp, wstat->qid.path, &stat->qid.path);
-	v9fs_put_int32(bufp, wstat->mode, &stat->mode);
-	v9fs_put_int32(bufp, wstat->atime, &stat->atime);
-	v9fs_put_int32(bufp, wstat->mtime, &stat->mtime);
-	v9fs_put_int64(bufp, wstat->length, &stat->length);
-
-	v9fs_put_str(bufp, wstat->name, &stat->name);
-	v9fs_put_str(bufp, wstat->uid, &stat->uid);
-	v9fs_put_str(bufp, wstat->gid, &stat->gid);
-	v9fs_put_str(bufp, wstat->muid, &stat->muid);
-
-	if (extended) {
-		v9fs_put_str(bufp, wstat->extension, &stat->extension);
-		v9fs_put_int32(bufp, wstat->n_uid, &stat->n_uid);
-		v9fs_put_int32(bufp, wstat->n_gid, &stat->n_gid);
-		v9fs_put_int32(bufp, wstat->n_muid, &stat->n_muid);
-	}
-}
-
-static struct v9fs_fcall *
-v9fs_create_common(struct cbuf *bufp, u32 size, u8 id)
-{
-	struct v9fs_fcall *fc;
-
-	size += 4 + 1 + 2;	/* size[4] id[1] tag[2] */
-	fc = kmalloc(sizeof(struct v9fs_fcall) + size, GFP_KERNEL);
-	if (!fc)
-		return ERR_PTR(-ENOMEM);
-
-	fc->sdata = (char *)fc + sizeof(*fc);
-
-	buf_init(bufp, (char *)fc->sdata, size);
-	v9fs_put_int32(bufp, size, &fc->size);
-	v9fs_put_int8(bufp, id, &fc->id);
-	v9fs_put_int16(bufp, V9FS_NOTAG, &fc->tag);
-
-	return fc;
-}
-
-void v9fs_set_tag(struct v9fs_fcall *fc, u16 tag)
-{
-	fc->tag = tag;
-	*(__le16 *) (fc->sdata + 5) = cpu_to_le16(tag);
-}
-
-struct v9fs_fcall *v9fs_create_tversion(u32 msize, char *version)
-{
-	int size;
-	struct v9fs_fcall *fc;
-	struct cbuf buffer;
-	struct cbuf *bufp = &buffer;
-
-	size = 4 + 2 + strlen(version);	/* msize[4] version[s] */
-	fc = v9fs_create_common(bufp, size, TVERSION);
-	if (IS_ERR(fc))
-		goto error;
-
-	v9fs_put_int32(bufp, msize, &fc->params.tversion.msize);
-	v9fs_put_str(bufp, version, &fc->params.tversion.version);
-
-	if (buf_check_overflow(bufp)) {
-		kfree(fc);
-		fc = ERR_PTR(-ENOMEM);
-	}
-      error:
-	return fc;
-}
-
-#if 0
-struct v9fs_fcall *v9fs_create_tauth(u32 afid, char *uname, char *aname)
-{
-	int size;
-	struct v9fs_fcall *fc;
-	struct cbuf buffer;
-	struct cbuf *bufp = &buffer;
-
-	size = 4 + 2 + strlen(uname) + 2 + strlen(aname);	/* afid[4] uname[s] aname[s] */
-	fc = v9fs_create_common(bufp, size, TAUTH);
-	if (IS_ERR(fc))
-		goto error;
-
-	v9fs_put_int32(bufp, afid, &fc->params.tauth.afid);
-	v9fs_put_str(bufp, uname, &fc->params.tauth.uname);
-	v9fs_put_str(bufp, aname, &fc->params.tauth.aname);
-
-	if (buf_check_overflow(bufp)) {
-		kfree(fc);
-		fc = ERR_PTR(-ENOMEM);
-	}
-      error:
-	return fc;
-}
-#endif  /*  0  */
-
-struct v9fs_fcall *
-v9fs_create_tattach(u32 fid, u32 afid, char *uname, char *aname)
-{
-	int size;
-	struct v9fs_fcall *fc;
-	struct cbuf buffer;
-	struct cbuf *bufp = &buffer;
-
-	size = 4 + 4 + 2 + strlen(uname) + 2 + strlen(aname);	/* fid[4] afid[4] uname[s] aname[s] */
-	fc = v9fs_create_common(bufp, size, TATTACH);
-	if (IS_ERR(fc))
-		goto error;
-
-	v9fs_put_int32(bufp, fid, &fc->params.tattach.fid);
-	v9fs_put_int32(bufp, afid, &fc->params.tattach.afid);
-	v9fs_put_str(bufp, uname, &fc->params.tattach.uname);
-	v9fs_put_str(bufp, aname, &fc->params.tattach.aname);
-
-      error:
-	return fc;
-}
-
-struct v9fs_fcall *v9fs_create_tflush(u16 oldtag)
-{
-	int size;
-	struct v9fs_fcall *fc;
-	struct cbuf buffer;
-	struct cbuf *bufp = &buffer;
-
-	size = 2;		/* oldtag[2] */
-	fc = v9fs_create_common(bufp, size, TFLUSH);
-	if (IS_ERR(fc))
-		goto error;
-
-	v9fs_put_int16(bufp, oldtag, &fc->params.tflush.oldtag);
-
-	if (buf_check_overflow(bufp)) {
-		kfree(fc);
-		fc = ERR_PTR(-ENOMEM);
-	}
-      error:
-	return fc;
-}
-
-struct v9fs_fcall *v9fs_create_twalk(u32 fid, u32 newfid, u16 nwname,
-				     char **wnames)
-{
-	int i, size;
-	struct v9fs_fcall *fc;
-	struct cbuf buffer;
-	struct cbuf *bufp = &buffer;
-
-	if (nwname > V9FS_MAXWELEM) {
-		dprintk(DEBUG_ERROR, "nwname > %d\n", V9FS_MAXWELEM);
-		return NULL;
-	}
-
-	size = 4 + 4 + 2;	/* fid[4] newfid[4] nwname[2] ... */
-	for (i = 0; i < nwname; i++) {
-		size += 2 + strlen(wnames[i]);	/* wname[s] */
-	}
-
-	fc = v9fs_create_common(bufp, size, TWALK);
-	if (IS_ERR(fc))
-		goto error;
-
-	v9fs_put_int32(bufp, fid, &fc->params.twalk.fid);
-	v9fs_put_int32(bufp, newfid, &fc->params.twalk.newfid);
-	v9fs_put_int16(bufp, nwname, &fc->params.twalk.nwname);
-	for (i = 0; i < nwname; i++) {
-		v9fs_put_str(bufp, wnames[i], &fc->params.twalk.wnames[i]);
-	}
-
-	if (buf_check_overflow(bufp)) {
-		kfree(fc);
-		fc = ERR_PTR(-ENOMEM);
-	}
-      error:
-	return fc;
-}
-
-struct v9fs_fcall *v9fs_create_topen(u32 fid, u8 mode)
-{
-	int size;
-	struct v9fs_fcall *fc;
-	struct cbuf buffer;
-	struct cbuf *bufp = &buffer;
-
-	size = 4 + 1;		/* fid[4] mode[1] */
-	fc = v9fs_create_common(bufp, size, TOPEN);
-	if (IS_ERR(fc))
-		goto error;
-
-	v9fs_put_int32(bufp, fid, &fc->params.topen.fid);
-	v9fs_put_int8(bufp, mode, &fc->params.topen.mode);
-
-	if (buf_check_overflow(bufp)) {
-		kfree(fc);
-		fc = ERR_PTR(-ENOMEM);
-	}
-      error:
-	return fc;
-}
-
-struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
-	char *extension, int extended)
-{
-	int size;
-	struct v9fs_fcall *fc;
-	struct cbuf buffer;
-	struct cbuf *bufp = &buffer;
-
-	size = 4 + 2 + strlen(name) + 4 + 1;	/* fid[4] name[s] perm[4] mode[1] */
-	if (extended) {
-		size += 2 +			/* extension[s] */
-		    (extension == NULL ? 0 : strlen(extension));
-	}
-
-	fc = v9fs_create_common(bufp, size, TCREATE);
-	if (IS_ERR(fc))
-		goto error;
-
-	v9fs_put_int32(bufp, fid, &fc->params.tcreate.fid);
-	v9fs_put_str(bufp, name, &fc->params.tcreate.name);
-	v9fs_put_int32(bufp, perm, &fc->params.tcreate.perm);
-	v9fs_put_int8(bufp, mode, &fc->params.tcreate.mode);
-	if (extended)
-		v9fs_put_str(bufp, extension, &fc->params.tcreate.extension);
-
-	if (buf_check_overflow(bufp)) {
-		kfree(fc);
-		fc = ERR_PTR(-ENOMEM);
-	}
-      error:
-	return fc;
-}
-
-struct v9fs_fcall *v9fs_create_tread(u32 fid, u64 offset, u32 count)
-{
-	int size;
-	struct v9fs_fcall *fc;
-	struct cbuf buffer;
-	struct cbuf *bufp = &buffer;
-
-	size = 4 + 8 + 4;	/* fid[4] offset[8] count[4] */
-	fc = v9fs_create_common(bufp, size, TREAD);
-	if (IS_ERR(fc))
-		goto error;
-
-	v9fs_put_int32(bufp, fid, &fc->params.tread.fid);
-	v9fs_put_int64(bufp, offset, &fc->params.tread.offset);
-	v9fs_put_int32(bufp, count, &fc->params.tread.count);
-
-	if (buf_check_overflow(bufp)) {
-		kfree(fc);
-		fc = ERR_PTR(-ENOMEM);
-	}
-      error:
-	return fc;
-}
-
-struct v9fs_fcall *v9fs_create_twrite(u32 fid, u64 offset, u32 count,
-				      const char __user * data)
-{
-	int size, err;
-	struct v9fs_fcall *fc;
-	struct cbuf buffer;
-	struct cbuf *bufp = &buffer;
-
-	size = 4 + 8 + 4 + count;	/* fid[4] offset[8] count[4] data[count] */
-	fc = v9fs_create_common(bufp, size, TWRITE);
-	if (IS_ERR(fc))
-		goto error;
-
-	v9fs_put_int32(bufp, fid, &fc->params.twrite.fid);
-	v9fs_put_int64(bufp, offset, &fc->params.twrite.offset);
-	v9fs_put_int32(bufp, count, &fc->params.twrite.count);
-	err = v9fs_put_user_data(bufp, data, count, &fc->params.twrite.data);
-	if (err) {
-		kfree(fc);
-		fc = ERR_PTR(err);
-	}
-
-	if (buf_check_overflow(bufp)) {
-		kfree(fc);
-		fc = ERR_PTR(-ENOMEM);
-	}
-      error:
-	return fc;
-}
-
-struct v9fs_fcall *v9fs_create_tclunk(u32 fid)
-{
-	int size;
-	struct v9fs_fcall *fc;
-	struct cbuf buffer;
-	struct cbuf *bufp = &buffer;
-
-	size = 4;		/* fid[4] */
-	fc = v9fs_create_common(bufp, size, TCLUNK);
-	if (IS_ERR(fc))
-		goto error;
-
-	v9fs_put_int32(bufp, fid, &fc->params.tclunk.fid);
-
-	if (buf_check_overflow(bufp)) {
-		kfree(fc);
-		fc = ERR_PTR(-ENOMEM);
-	}
-      error:
-	return fc;
-}
-
-struct v9fs_fcall *v9fs_create_tremove(u32 fid)
-{
-	int size;
-	struct v9fs_fcall *fc;
-	struct cbuf buffer;
-	struct cbuf *bufp = &buffer;
-
-	size = 4;		/* fid[4] */
-	fc = v9fs_create_common(bufp, size, TREMOVE);
-	if (IS_ERR(fc))
-		goto error;
-
-	v9fs_put_int32(bufp, fid, &fc->params.tremove.fid);
-
-	if (buf_check_overflow(bufp)) {
-		kfree(fc);
-		fc = ERR_PTR(-ENOMEM);
-	}
-      error:
-	return fc;
-}
-
-struct v9fs_fcall *v9fs_create_tstat(u32 fid)
-{
-	int size;
-	struct v9fs_fcall *fc;
-	struct cbuf buffer;
-	struct cbuf *bufp = &buffer;
-
-	size = 4;		/* fid[4] */
-	fc = v9fs_create_common(bufp, size, TSTAT);
-	if (IS_ERR(fc))
-		goto error;
-
-	v9fs_put_int32(bufp, fid, &fc->params.tstat.fid);
-
-	if (buf_check_overflow(bufp)) {
-		kfree(fc);
-		fc = ERR_PTR(-ENOMEM);
-	}
-      error:
-	return fc;
-}
-
-struct v9fs_fcall *v9fs_create_twstat(u32 fid, struct v9fs_wstat *wstat,
-				      int extended)
-{
-	int size, statsz;
-	struct v9fs_fcall *fc;
-	struct cbuf buffer;
-	struct cbuf *bufp = &buffer;
-
-	statsz = v9fs_size_wstat(wstat, extended);
-	size = 4 + 2 + 2 + statsz;	/* fid[4] stat[n] */
-	fc = v9fs_create_common(bufp, size, TWSTAT);
-	if (IS_ERR(fc))
-		goto error;
-
-	v9fs_put_int32(bufp, fid, &fc->params.twstat.fid);
-	buf_put_int16(bufp, statsz + 2);
-	v9fs_put_wstat(bufp, wstat, &fc->params.twstat.stat, statsz, extended);
-
-	if (buf_check_overflow(bufp)) {
-		kfree(fc);
-		fc = ERR_PTR(-ENOMEM);
-	}
-      error:
-	return fc;
-}
diff --git a/fs/9p/conv.h b/fs/9p/conv.h
deleted file mode 100644
index dd5b6b1..0000000
--- a/fs/9p/conv.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * linux/fs/9p/conv.h
- *
- * 9P protocol conversion definitions.
- *
- *  Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
- *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
- */
-
-int v9fs_deserialize_stat(void *buf, u32 buflen, struct v9fs_stat *stat,
-	int extended);
-int v9fs_deserialize_fcall(void *buf, u32 buflen, struct v9fs_fcall *rcall,
-	int extended);
-
-void v9fs_set_tag(struct v9fs_fcall *fc, u16 tag);
-
-struct v9fs_fcall *v9fs_create_tversion(u32 msize, char *version);
-struct v9fs_fcall *v9fs_create_tattach(u32 fid, u32 afid, char *uname,
-	char *aname);
-struct v9fs_fcall *v9fs_create_tflush(u16 oldtag);
-struct v9fs_fcall *v9fs_create_twalk(u32 fid, u32 newfid, u16 nwname,
-	char **wnames);
-struct v9fs_fcall *v9fs_create_topen(u32 fid, u8 mode);
-struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
-	char *extension, int extended);
-struct v9fs_fcall *v9fs_create_tread(u32 fid, u64 offset, u32 count);
-struct v9fs_fcall *v9fs_create_twrite(u32 fid, u64 offset, u32 count,
-	const char __user *data);
-struct v9fs_fcall *v9fs_create_tclunk(u32 fid);
-struct v9fs_fcall *v9fs_create_tremove(u32 fid);
-struct v9fs_fcall *v9fs_create_tstat(u32 fid);
-struct v9fs_fcall *v9fs_create_twstat(u32 fid, struct v9fs_wstat *wstat,
-	int extended);
diff --git a/fs/9p/debug.h b/fs/9p/debug.h
deleted file mode 100644
index 4228c0b..0000000
--- a/fs/9p/debug.h
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- *  linux/fs/9p/debug.h - V9FS Debug Definitions
- *
- *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
- */
-
-#define DEBUG_ERROR		(1<<0)
-#define DEBUG_CURRENT		(1<<1)
-#define DEBUG_9P	        (1<<2)
-#define DEBUG_VFS	        (1<<3)
-#define DEBUG_CONV		(1<<4)
-#define DEBUG_MUX		(1<<5)
-#define DEBUG_TRANS		(1<<6)
-#define DEBUG_SLABS	      	(1<<7)
-#define DEBUG_FCALL		(1<<8)
-
-#define DEBUG_DUMP_PKT		0
-
-extern int v9fs_debug_level;
-
-#define dprintk(level, format, arg...) \
-do {  \
-	if((v9fs_debug_level & level)==level) \
-		printk(KERN_NOTICE "-- %s (%d): " \
-		format , __FUNCTION__, current->pid , ## arg); \
-} while(0)
-
-#define eprintk(level, format, arg...) \
-do { \
-	printk(level "v9fs: %s (%d): " \
-		format , __FUNCTION__, current->pid , ## arg); \
-} while(0)
-
-#if DEBUG_DUMP_PKT
-static inline void dump_data(const unsigned char *data, unsigned int datalen)
-{
-	int i, n;
-	char buf[5*8];
-
-	n = 0;
-	i = 0;
-	while (i < datalen) {
-		n += snprintf(buf+n, sizeof(buf)-n, "%02x", data[i++]);
-		if (i%4 == 0)
-			n += snprintf(buf+n, sizeof(buf)-n, " ");
-
-		if (i%16 == 0) {
-			dprintk(DEBUG_ERROR, "%s\n", buf);
-			n = 0;
-		}
-	}
-
-	dprintk(DEBUG_ERROR, "%s\n", buf);
-}
-#else				/* DEBUG_DUMP_PKT */
-static inline void dump_data(const unsigned char *data, unsigned int datalen)
-{
-
-}
-#endif				/* DEBUG_DUMP_PKT */
diff --git a/fs/9p/error.c b/fs/9p/error.c
deleted file mode 100644
index 0d7fa4e..0000000
--- a/fs/9p/error.c
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * linux/fs/9p/error.c
- *
- * Error string handling
- *
- * Plan 9 uses error strings, Unix uses error numbers.  These functions
- * try to help manage that and provide for dynamically adding error
- * mappings.
- *
- *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
- */
-
-#include <linux/module.h>
-
-#include <linux/list.h>
-#include <linux/jhash.h>
-
-#include "debug.h"
-#include "error.h"
-
-/**
- * v9fs_error_init - preload
- * @errstr: error string
- *
- */
-
-int v9fs_error_init(void)
-{
-	struct errormap *c;
-	int bucket;
-
-	/* initialize hash table */
-	for (bucket = 0; bucket < ERRHASHSZ; bucket++)
-		INIT_HLIST_HEAD(&hash_errmap[bucket]);
-
-	/* load initial error map into hash table */
-	for (c = errmap; c->name != NULL; c++) {
-		c->namelen = strlen(c->name);
-		bucket = jhash(c->name, c->namelen, 0) % ERRHASHSZ;
-		INIT_HLIST_NODE(&c->list);
-		hlist_add_head(&c->list, &hash_errmap[bucket]);
-	}
-
-	return 1;
-}
-
-/**
- * errstr2errno - convert error string to error number
- * @errstr: error string
- *
- */
-
-int v9fs_errstr2errno(char *errstr, int len)
-{
-	int errno = 0;
-	struct hlist_node *p = NULL;
-	struct errormap *c = NULL;
-	int bucket = jhash(errstr, len, 0) % ERRHASHSZ;
-
-	hlist_for_each_entry(c, p, &hash_errmap[bucket], list) {
-		if (c->namelen==len && !memcmp(c->name, errstr, len)) {
-			errno = c->val;
-			break;
-		}
-	}
-
-	if (errno == 0) {
-		/* TODO: if error isn't found, add it dynamically */
-		errstr[len] = 0;
-		printk(KERN_ERR "%s: errstr :%s: not found\n", __FUNCTION__,
-		       errstr);
-		errno = 1;
-	}
-
-	return -errno;
-}
diff --git a/fs/9p/error.h b/fs/9p/error.h
deleted file mode 100644
index 5f3ca52..0000000
--- a/fs/9p/error.h
+++ /dev/null
@@ -1,177 +0,0 @@
-/*
- * linux/fs/9p/error.h
- *
- * Huge Nasty Error Table
- *
- * Plan 9 uses error strings, Unix uses error numbers.  This table tries to
- * match UNIX strings and Plan 9 strings to unix error numbers.  It is used
- * to preload the dynamic error table which can also track user-specific error
- * strings.
- *
- *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
- */
-
-#include <linux/errno.h>
-#include <asm/errno.h>
-
-struct errormap {
-	char *name;
-	int val;
-
-	int namelen;
-	struct hlist_node list;
-};
-
-#define ERRHASHSZ		32
-static struct hlist_head hash_errmap[ERRHASHSZ];
-
-/* FixMe - reduce to a reasonable size */
-static struct errormap errmap[] = {
-	{"Operation not permitted", EPERM},
-	{"wstat prohibited", EPERM},
-	{"No such file or directory", ENOENT},
-	{"directory entry not found", ENOENT},
-	{"file not found", ENOENT},
-	{"Interrupted system call", EINTR},
-	{"Input/output error", EIO},
-	{"No such device or address", ENXIO},
-	{"Argument list too long", E2BIG},
-	{"Bad file descriptor", EBADF},
-	{"Resource temporarily unavailable", EAGAIN},
-	{"Cannot allocate memory", ENOMEM},
-	{"Permission denied", EACCES},
-	{"Bad address", EFAULT},
-	{"Block device required", ENOTBLK},
-	{"Device or resource busy", EBUSY},
-	{"File exists", EEXIST},
-	{"Invalid cross-device link", EXDEV},
-	{"No such device", ENODEV},
-	{"Not a directory", ENOTDIR},
-	{"Is a directory", EISDIR},
-	{"Invalid argument", EINVAL},
-	{"Too many open files in system", ENFILE},
-	{"Too many open files", EMFILE},
-	{"Text file busy", ETXTBSY},
-	{"File too large", EFBIG},
-	{"No space left on device", ENOSPC},
-	{"Illegal seek", ESPIPE},
-	{"Read-only file system", EROFS},
-	{"Too many links", EMLINK},
-	{"Broken pipe", EPIPE},
-	{"Numerical argument out of domain", EDOM},
-	{"Numerical result out of range", ERANGE},
-	{"Resource deadlock avoided", EDEADLK},
-	{"File name too long", ENAMETOOLONG},
-	{"No locks available", ENOLCK},
-	{"Function not implemented", ENOSYS},
-	{"Directory not empty", ENOTEMPTY},
-	{"Too many levels of symbolic links", ELOOP},
-	{"No message of desired type", ENOMSG},
-	{"Identifier removed", EIDRM},
-	{"No data available", ENODATA},
-	{"Machine is not on the network", ENONET},
-	{"Package not installed", ENOPKG},
-	{"Object is remote", EREMOTE},
-	{"Link has been severed", ENOLINK},
-	{"Communication error on send", ECOMM},
-	{"Protocol error", EPROTO},
-	{"Bad message", EBADMSG},
-	{"File descriptor in bad state", EBADFD},
-	{"Streams pipe error", ESTRPIPE},
-	{"Too many users", EUSERS},
-	{"Socket operation on non-socket", ENOTSOCK},
-	{"Message too long", EMSGSIZE},
-	{"Protocol not available", ENOPROTOOPT},
-	{"Protocol not supported", EPROTONOSUPPORT},
-	{"Socket type not supported", ESOCKTNOSUPPORT},
-	{"Operation not supported", EOPNOTSUPP},
-	{"Protocol family not supported", EPFNOSUPPORT},
-	{"Network is down", ENETDOWN},
-	{"Network is unreachable", ENETUNREACH},
-	{"Network dropped connection on reset", ENETRESET},
-	{"Software caused connection abort", ECONNABORTED},
-	{"Connection reset by peer", ECONNRESET},
-	{"No buffer space available", ENOBUFS},
-	{"Transport endpoint is already connected", EISCONN},
-	{"Transport endpoint is not connected", ENOTCONN},
-	{"Cannot send after transport endpoint shutdown", ESHUTDOWN},
-	{"Connection timed out", ETIMEDOUT},
-	{"Connection refused", ECONNREFUSED},
-	{"Host is down", EHOSTDOWN},
-	{"No route to host", EHOSTUNREACH},
-	{"Operation already in progress", EALREADY},
-	{"Operation now in progress", EINPROGRESS},
-	{"Is a named type file", EISNAM},
-	{"Remote I/O error", EREMOTEIO},
-	{"Disk quota exceeded", EDQUOT},
-/* errors from fossil, vacfs, and u9fs */
-	{"fid unknown or out of range", EBADF},
-	{"permission denied", EACCES},
-	{"file does not exist", ENOENT},
-	{"authentication failed", ECONNREFUSED},
-	{"bad offset in directory read", ESPIPE},
-	{"bad use of fid", EBADF},
-	{"wstat can't convert between files and directories", EPERM},
-	{"directory is not empty", ENOTEMPTY},
-	{"file exists", EEXIST},
-	{"file already exists", EEXIST},
-	{"file or directory already exists", EEXIST},
-	{"fid already in use", EBADF},
-	{"file in use", ETXTBSY},
-	{"i/o error", EIO},
-	{"file already open for I/O", ETXTBSY},
-	{"illegal mode", EINVAL},
-	{"illegal name", ENAMETOOLONG},
-	{"not a directory", ENOTDIR},
-	{"not a member of proposed group", EPERM},
-	{"not owner", EACCES},
-	{"only owner can change group in wstat", EACCES},
-	{"read only file system", EROFS},
-	{"no access to special file", EPERM},
-	{"i/o count too large", EIO},
-	{"unknown group", EINVAL},
-	{"unknown user", EINVAL},
-	{"bogus wstat buffer", EPROTO},
-	{"exclusive use file already open", EAGAIN},
-	{"corrupted directory entry", EIO},
-	{"corrupted file entry", EIO},
-	{"corrupted block label", EIO},
-	{"corrupted meta data", EIO},
-	{"illegal offset", EINVAL},
-	{"illegal path element", ENOENT},
-	{"root of file system is corrupted", EIO},
-	{"corrupted super block", EIO},
-	{"protocol botch", EPROTO},
-	{"file system is full", ENOSPC},
-	{"file is in use", EAGAIN},
-	{"directory entry is not allocated", ENOENT},
-	{"file is read only", EROFS},
-	{"file has been removed", EIDRM},
-	{"only support truncation to zero length", EPERM},
-	{"cannot remove root", EPERM},
-	{"file too big", EFBIG},
-	{"venti i/o error", EIO},
-	/* these are not errors */
-	{"u9fs rhostsauth: no authentication required", 0},
-	{"u9fs authnone: no authentication required", 0},
-	{NULL, -1}
-};
-
-extern int v9fs_error_init(void);
diff --git a/fs/9p/fcall.c b/fs/9p/fcall.c
deleted file mode 100644
index dc336a6..0000000
--- a/fs/9p/fcall.c
+++ /dev/null
@@ -1,427 +0,0 @@
-/*
- *  linux/fs/9p/fcall.c
- *
- *  This file contains functions to perform synchronous 9P calls
- *
- *  Copyright (C) 2004 by Latchesar Ionkov <lucho@ionkov.net>
- *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
- */
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/sched.h>
-#include <linux/idr.h>
-
-#include "debug.h"
-#include "v9fs.h"
-#include "9p.h"
-#include "conv.h"
-#include "mux.h"
-
-/**
- * v9fs_t_version - negotiate protocol parameters with sever
- * @v9ses: 9P2000 session information
- * @msize: requested max size packet
- * @version: requested version.extension string
- * @fcall: pointer to response fcall pointer
- *
- */
-
-int
-v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize,
-	       char *version, struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall *tc;
-
-	dprintk(DEBUG_9P, "msize: %d version: %s\n", msize, version);
-	tc = v9fs_create_tversion(msize, version);
-
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-/**
- * v9fs_t_attach - mount the server
- * @v9ses: 9P2000 session information
- * @uname: user name doing the attach
- * @aname: remote name being attached to
- * @fid: mount fid to attatch to root node
- * @afid: authentication fid (in this case result key)
- * @fcall: pointer to response fcall pointer
- *
- */
-
-int
-v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname,
-	      u32 fid, u32 afid, struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall* tc;
-
-	dprintk(DEBUG_9P, "uname '%s' aname '%s' fid %d afid %d\n", uname,
-		aname, fid, afid);
-
-	tc = v9fs_create_tattach(fid, afid, uname, aname);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-static void v9fs_t_clunk_cb(void *a, struct v9fs_fcall *tc,
-	struct v9fs_fcall *rc, int err)
-{
-	int fid, id;
-	struct v9fs_session_info *v9ses;
-
-	id = 0;
-	fid = tc->params.tclunk.fid;
-	if (rc)
-		id = rc->id;
-
-	kfree(tc);
-	kfree(rc);
-	if (id == RCLUNK) {
-		v9ses = a;
-		v9fs_put_idpool(fid, &v9ses->fidpool);
-	}
-}
-
-/**
- * v9fs_t_clunk - release a fid (finish a transaction)
- * @v9ses: 9P2000 session information
- * @fid: fid to release
- * @fcall: pointer to response fcall pointer
- *
- */
-
-int
-v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid)
-{
-	int ret;
-	struct v9fs_fcall *tc, *rc;
-
-	dprintk(DEBUG_9P, "fid %d\n", fid);
-
-	rc = NULL;
-	tc = v9fs_create_tclunk(fid);
-	if (!IS_ERR(tc))
-		ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
-	else
-		ret = PTR_ERR(tc);
-
-	if (ret)
-		dprintk(DEBUG_ERROR, "failed fid %d err %d\n", fid, ret);
-
-	v9fs_t_clunk_cb(v9ses, tc, rc, ret);
-	return ret;
-}
-
-#if 0
-/**
- * v9fs_v9fs_t_flush - flush a pending transaction
- * @v9ses: 9P2000 session information
- * @tag: tag to release
- *
- */
-int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 oldtag)
-{
-	int ret;
-	struct v9fs_fcall *tc;
-
-	dprintk(DEBUG_9P, "oldtag %d\n", oldtag);
-
-	tc = v9fs_create_tflush(oldtag);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, NULL);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-#endif
-
-/**
- * v9fs_t_stat - read a file's meta-data
- * @v9ses: 9P2000 session information
- * @fid: fid pointing to file or directory to get info about
- * @fcall: pointer to response fcall
- *
- */
-
-int
-v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall *tc;
-
-	dprintk(DEBUG_9P, "fid %d\n", fid);
-
-	ret = -ENOMEM;
-	tc = v9fs_create_tstat(fid);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-/**
- * v9fs_t_wstat - write a file's meta-data
- * @v9ses: 9P2000 session information
- * @fid: fid pointing to file or directory to write info about
- * @stat: metadata
- * @fcall: pointer to response fcall
- *
- */
-
-int
-v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid,
-	     struct v9fs_wstat *wstat, struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall *tc;
-
-	dprintk(DEBUG_9P, "fid %d\n", fid);
-
-	tc = v9fs_create_twstat(fid, wstat, v9ses->extended);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-/**
- * v9fs_t_walk - walk a fid to a new file or directory
- * @v9ses: 9P2000 session information
- * @fid: fid to walk
- * @newfid: new fid (for clone operations)
- * @name: path to walk fid to
- * @fcall: pointer to response fcall
- *
- */
-
-/* TODO: support multiple walk */
-
-int
-v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid,
-	    char *name, struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall *tc;
-	int nwname;
-
-	dprintk(DEBUG_9P, "fid %d newfid %d wname '%s'\n", fid, newfid, name);
-
-	if (name)
-		nwname = 1;
-	else
-		nwname = 0;
-
-	tc = v9fs_create_twalk(fid, newfid, nwname, &name);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-/**
- * v9fs_t_open - open a file
- *
- * @v9ses - 9P2000 session information
- * @fid - fid to open
- * @mode - mode to open file (R, RW, etc)
- * @fcall - pointer to response fcall
- *
- */
-
-int
-v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode,
-	    struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall *tc;
-
-	dprintk(DEBUG_9P, "fid %d mode %d\n", fid, mode);
-
-	tc = v9fs_create_topen(fid, mode);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-/**
- * v9fs_t_remove - remove a file or directory
- * @v9ses: 9P2000 session information
- * @fid: fid to remove
- * @fcall: pointer to response fcall
- *
- */
-
-int
-v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid,
-	      struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall *tc;
-
-	dprintk(DEBUG_9P, "fid %d\n", fid);
-
-	tc = v9fs_create_tremove(fid);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-/**
- * v9fs_t_create - create a file or directory
- * @v9ses: 9P2000 session information
- * @fid: fid to create
- * @name: name of the file or directory to create
- * @perm: permissions to create with
- * @mode: mode to open file (R, RW, etc)
- * @fcall: pointer to response fcall
- *
- */
-
-int
-v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name, u32 perm,
-	u8 mode, char *extension, struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall *tc;
-
-	dprintk(DEBUG_9P, "fid %d name '%s' perm %x mode %d\n",
-		fid, name, perm, mode);
-
-	tc = v9fs_create_tcreate(fid, name, perm, mode, extension,
-		v9ses->extended);
-
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-/**
- * v9fs_t_read - read data
- * @v9ses: 9P2000 session information
- * @fid: fid to read from
- * @offset: offset to start read at
- * @count: how many bytes to read
- * @fcall: pointer to response fcall (with data)
- *
- */
-
-int
-v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid, u64 offset,
-	    u32 count, struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall *tc, *rc;
-
-	dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid,
-		(long long unsigned) offset, count);
-
-	tc = v9fs_create_tread(fid, offset, count);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
-		if (!ret)
-			ret = rc->params.rread.count;
-		if (rcp)
-			*rcp = rc;
-		else
-			kfree(rc);
-
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
-/**
- * v9fs_t_write - write data
- * @v9ses: 9P2000 session information
- * @fid: fid to write to
- * @offset: offset to start write at
- * @count: how many bytes to write
- * @fcall: pointer to response fcall
- *
- */
-
-int
-v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset, u32 count,
-	const char __user *data, struct v9fs_fcall **rcp)
-{
-	int ret;
-	struct v9fs_fcall *tc, *rc;
-
-	dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid,
-		(long long unsigned) offset, count);
-
-	tc = v9fs_create_twrite(fid, offset, count, data);
-	if (!IS_ERR(tc)) {
-		ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
-
-		if (!ret)
-			ret = rc->params.rwrite.count;
-		if (rcp)
-			*rcp = rc;
-		else
-			kfree(rc);
-
-		kfree(tc);
-	} else
-		ret = PTR_ERR(tc);
-
-	return ret;
-}
-
diff --git a/fs/9p/fcprint.c b/fs/9p/fcprint.c
deleted file mode 100644
index 34b9611..0000000
--- a/fs/9p/fcprint.c
+++ /dev/null
@@ -1,345 +0,0 @@
-/*
- *  linux/fs/9p/fcprint.c
- *
- *  Print 9P call.
- *
- *  Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
- */
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/idr.h>
-
-#include "debug.h"
-#include "v9fs.h"
-#include "9p.h"
-#include "mux.h"
-
-static int
-v9fs_printqid(char *buf, int buflen, struct v9fs_qid *q)
-{
-	int n;
-	char b[10];
-
-	n = 0;
-	if (q->type & V9FS_QTDIR)
-		b[n++] = 'd';
-	if (q->type & V9FS_QTAPPEND)
-		b[n++] = 'a';
-	if (q->type & V9FS_QTAUTH)
-		b[n++] = 'A';
-	if (q->type & V9FS_QTEXCL)
-		b[n++] = 'l';
-	if (q->type & V9FS_QTTMP)
-		b[n++] = 't';
-	if (q->type & V9FS_QTSYMLINK)
-		b[n++] = 'L';
-	b[n] = '\0';
-
-	return scnprintf(buf, buflen, "(%.16llx %x %s)", (long long int) q->path,
-		q->version, b);
-}
-
-static int
-v9fs_printperm(char *buf, int buflen, int perm)
-{
-	int n;
-	char b[15];
-
-	n = 0;
-	if (perm & V9FS_DMDIR)
-		b[n++] = 'd';
-	if (perm & V9FS_DMAPPEND)
-		b[n++] = 'a';
-	if (perm & V9FS_DMAUTH)
-		b[n++] = 'A';
-	if (perm & V9FS_DMEXCL)
-		b[n++] = 'l';
-	if (perm & V9FS_DMTMP)
-		b[n++] = 't';
-	if (perm & V9FS_DMDEVICE)
-		b[n++] = 'D';
-	if (perm & V9FS_DMSOCKET)
-		b[n++] = 'S';
-	if (perm & V9FS_DMNAMEDPIPE)
-		b[n++] = 'P';
-	if (perm & V9FS_DMSYMLINK)
-		b[n++] = 'L';
-	b[n] = '\0';
-
-	return scnprintf(buf, buflen, "%s%03o", b, perm&077);
-}
-
-static int
-v9fs_printstat(char *buf, int buflen, struct v9fs_stat *st, int extended)
-{
-	int n;
-
-	n = scnprintf(buf, buflen, "'%.*s' '%.*s'", st->name.len,
-		st->name.str, st->uid.len, st->uid.str);
-	if (extended)
-		n += scnprintf(buf+n, buflen-n, "(%d)", st->n_uid);
-
-	n += scnprintf(buf+n, buflen-n, " '%.*s'", st->gid.len, st->gid.str);
-	if (extended)
-		n += scnprintf(buf+n, buflen-n, "(%d)", st->n_gid);
-
-	n += scnprintf(buf+n, buflen-n, " '%.*s'", st->muid.len, st->muid.str);
-	if (extended)
-		n += scnprintf(buf+n, buflen-n, "(%d)", st->n_muid);
-
-	n += scnprintf(buf+n, buflen-n, " q ");
-	n += v9fs_printqid(buf+n, buflen-n, &st->qid);
-	n += scnprintf(buf+n, buflen-n, " m ");
-	n += v9fs_printperm(buf+n, buflen-n, st->mode);
-	n += scnprintf(buf+n, buflen-n, " at %d mt %d l %lld",
-		st->atime, st->mtime, (long long int) st->length);
-
-	if (extended)
-		n += scnprintf(buf+n, buflen-n, " ext '%.*s'",
-			st->extension.len, st->extension.str);
-
-	return n;
-}
-
-static int
-v9fs_dumpdata(char *buf, int buflen, u8 *data, int datalen)
-{
-	int i, n;
-
-	i = n = 0;
-	while (i < datalen) {
-		n += scnprintf(buf + n, buflen - n, "%02x", data[i]);
-		if (i%4 == 3)
-			n += scnprintf(buf + n, buflen - n, " ");
-		if (i%32 == 31)
-			n += scnprintf(buf + n, buflen - n, "\n");
-
-		i++;
-	}
-	n += scnprintf(buf + n, buflen - n, "\n");
-
-	return n;
-}
-
-static int
-v9fs_printdata(char *buf, int buflen, u8 *data, int datalen)
-{
-	return v9fs_dumpdata(buf, buflen, data, datalen<16?datalen:16);
-}
-
-int
-v9fs_printfcall(char *buf, int buflen, struct v9fs_fcall *fc, int extended)
-{
-	int i, ret, type, tag;
-
-	if (!fc)
-		return scnprintf(buf, buflen, "<NULL>");
-
-	type = fc->id;
-	tag = fc->tag;
-
-	ret = 0;
-	switch (type) {
-	case TVERSION:
-		ret += scnprintf(buf+ret, buflen-ret,
-			"Tversion tag %u msize %u version '%.*s'", tag,
-			fc->params.tversion.msize, fc->params.tversion.version.len,
-			fc->params.tversion.version.str);
-		break;
-
-	case RVERSION:
-		ret += scnprintf(buf+ret, buflen-ret,
-			"Rversion tag %u msize %u version '%.*s'", tag,
-			fc->params.rversion.msize, fc->params.rversion.version.len,
-			fc->params.rversion.version.str);
-		break;
-
-	case TAUTH:
-		ret += scnprintf(buf+ret, buflen-ret,
-			"Tauth tag %u afid %d uname '%.*s' aname '%.*s'", tag,
-			fc->params.tauth.afid, fc->params.tauth.uname.len,
-			fc->params.tauth.uname.str, fc->params.tauth.aname.len,
-			fc->params.tauth.aname.str);
-		break;
-
-	case RAUTH:
-		ret += scnprintf(buf+ret, buflen-ret, "Rauth tag %u qid ", tag);
-		v9fs_printqid(buf+ret, buflen-ret, &fc->params.rauth.qid);
-		break;
-
-	case TATTACH:
-		ret += scnprintf(buf+ret, buflen-ret,
-			"Tattach tag %u fid %d afid %d uname '%.*s' aname '%.*s'",
-			tag, fc->params.tattach.fid, fc->params.tattach.afid,
-			fc->params.tattach.uname.len, fc->params.tattach.uname.str,
-			fc->params.tattach.aname.len, fc->params.tattach.aname.str);
-		break;
-
-	case RATTACH:
-		ret += scnprintf(buf+ret, buflen-ret, "Rattach tag %u qid ", tag);
-		v9fs_printqid(buf+ret, buflen-ret, &fc->params.rattach.qid);
-		break;
-
-	case RERROR:
-		ret += scnprintf(buf+ret, buflen-ret, "Rerror tag %u ename '%.*s'",
-			tag, fc->params.rerror.error.len,
-			fc->params.rerror.error.str);
-		if (extended)
-			ret += scnprintf(buf+ret, buflen-ret, " ecode %d\n",
-				fc->params.rerror.errno);
-		break;
-
-	case TFLUSH:
-		ret += scnprintf(buf+ret, buflen-ret, "Tflush tag %u oldtag %u",
-			tag, fc->params.tflush.oldtag);
-		break;
-
-	case RFLUSH:
-		ret += scnprintf(buf+ret, buflen-ret, "Rflush tag %u", tag);
-		break;
-
-	case TWALK:
-		ret += scnprintf(buf+ret, buflen-ret,
-			"Twalk tag %u fid %d newfid %d nwname %d", tag,
-			fc->params.twalk.fid, fc->params.twalk.newfid,
-			fc->params.twalk.nwname);
-		for(i = 0; i < fc->params.twalk.nwname; i++)
-			ret += scnprintf(buf+ret, buflen-ret," '%.*s'",
-				fc->params.twalk.wnames[i].len,
-				fc->params.twalk.wnames[i].str);
-		break;
-
-	case RWALK:
-		ret += scnprintf(buf+ret, buflen-ret, "Rwalk tag %u nwqid %d",
-			tag, fc->params.rwalk.nwqid);
-		for(i = 0; i < fc->params.rwalk.nwqid; i++)
-			ret += v9fs_printqid(buf+ret, buflen-ret,
-				&fc->params.rwalk.wqids[i]);
-		break;
-
-	case TOPEN:
-		ret += scnprintf(buf+ret, buflen-ret,
-			"Topen tag %u fid %d mode %d", tag,
-			fc->params.topen.fid, fc->params.topen.mode);
-		break;
-
-	case ROPEN:
-		ret += scnprintf(buf+ret, buflen-ret, "Ropen tag %u", tag);
-		ret += v9fs_printqid(buf+ret, buflen-ret, &fc->params.ropen.qid);
-		ret += scnprintf(buf+ret, buflen-ret," iounit %d",
-			fc->params.ropen.iounit);
-		break;
-
-	case TCREATE:
-		ret += scnprintf(buf+ret, buflen-ret,
-			"Tcreate tag %u fid %d name '%.*s' perm ", tag,
-			fc->params.tcreate.fid, fc->params.tcreate.name.len,
-			fc->params.tcreate.name.str);
-
-		ret += v9fs_printperm(buf+ret, buflen-ret, fc->params.tcreate.perm);
-		ret += scnprintf(buf+ret, buflen-ret, " mode %d",
-			fc->params.tcreate.mode);
-		break;
-
-	case RCREATE:
-		ret += scnprintf(buf+ret, buflen-ret, "Rcreate tag %u", tag);
-		ret += v9fs_printqid(buf+ret, buflen-ret, &fc->params.rcreate.qid);
-		ret += scnprintf(buf+ret, buflen-ret, " iounit %d",
-			fc->params.rcreate.iounit);
-		break;
-
-	case TREAD:
-		ret += scnprintf(buf+ret, buflen-ret,
-			"Tread tag %u fid %d offset %lld count %u", tag,
-			fc->params.tread.fid,
-			(long long int) fc->params.tread.offset,
-			fc->params.tread.count);
-		break;
-
-	case RREAD:
-		ret += scnprintf(buf+ret, buflen-ret,
-			"Rread tag %u count %u data ", tag,
-			fc->params.rread.count);
-		ret += v9fs_printdata(buf+ret, buflen-ret, fc->params.rread.data,
-			fc->params.rread.count);
-		break;
-
-	case TWRITE:
-		ret += scnprintf(buf+ret, buflen-ret,
-			"Twrite tag %u fid %d offset %lld count %u data ",
-			tag, fc->params.twrite.fid,
-			(long long int) fc->params.twrite.offset,
-			fc->params.twrite.count);
-		ret += v9fs_printdata(buf+ret, buflen-ret, fc->params.twrite.data,
-			fc->params.twrite.count);
-		break;
-
-	case RWRITE:
-		ret += scnprintf(buf+ret, buflen-ret, "Rwrite tag %u count %u",
-			tag, fc->params.rwrite.count);
-		break;
-
-	case TCLUNK:
-		ret += scnprintf(buf+ret, buflen-ret, "Tclunk tag %u fid %d",
-			tag, fc->params.tclunk.fid);
-		break;
-
-	case RCLUNK:
-		ret += scnprintf(buf+ret, buflen-ret, "Rclunk tag %u", tag);
-		break;
-
-	case TREMOVE:
-		ret += scnprintf(buf+ret, buflen-ret, "Tremove tag %u fid %d",
-			tag, fc->params.tremove.fid);
-		break;
-
-	case RREMOVE:
-		ret += scnprintf(buf+ret, buflen-ret, "Rremove tag %u", tag);
-		break;
-
-	case TSTAT:
-		ret += scnprintf(buf+ret, buflen-ret, "Tstat tag %u fid %d",
-			tag, fc->params.tstat.fid);
-		break;
-
-	case RSTAT:
-		ret += scnprintf(buf+ret, buflen-ret, "Rstat tag %u ", tag);
-		ret += v9fs_printstat(buf+ret, buflen-ret, &fc->params.rstat.stat,
-			extended);
-		break;
-
-	case TWSTAT:
-		ret += scnprintf(buf+ret, buflen-ret, "Twstat tag %u fid %d ",
-			tag, fc->params.twstat.fid);
-		ret += v9fs_printstat(buf+ret, buflen-ret, &fc->params.twstat.stat,
-			extended);
-		break;
-
-	case RWSTAT:
-		ret += scnprintf(buf+ret, buflen-ret, "Rwstat tag %u", tag);
-		break;
-
-	default:
-		ret += scnprintf(buf+ret, buflen-ret, "unknown type %d", type);
-		break;
-	}
-
-	return ret;
-}
diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index 9041971..08fa320 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -26,10 +26,10 @@
 #include <linux/sched.h>
 #include <linux/idr.h>
 #include <asm/semaphore.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
 
-#include "debug.h"
 #include "v9fs.h"
-#include "9p.h"
 #include "v9fs_vfs.h"
 #include "fid.h"
 
@@ -40,67 +40,29 @@
  *
  */
 
-int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry)
+int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid)
 {
-	struct list_head *fid_list = (struct list_head *)dentry->d_fsdata;
-	dprintk(DEBUG_9P, "fid %d (%p) dentry %s (%p)\n", fid->fid, fid,
-		dentry->d_iname, dentry);
-	if (dentry->d_fsdata == NULL) {
-		dentry->d_fsdata =
-		    kmalloc(sizeof(struct list_head), GFP_KERNEL);
-		if (dentry->d_fsdata == NULL) {
-			dprintk(DEBUG_ERROR, "Out of memory\n");
-			return -ENOMEM;
-		}
-		fid_list = (struct list_head *)dentry->d_fsdata;
-		INIT_LIST_HEAD(fid_list);	/* Initialize list head */
-	}
+	struct v9fs_dentry *dent;
 
-	fid->uid = current->uid;
-	list_add(&fid->list, fid_list);
-	return 0;
-}
+	P9_DPRINTK(P9_DEBUG_VFS, "fid %d dentry %s\n",
+					fid->fid, dentry->d_iname);
 
-/**
- * v9fs_fid_create - allocate a FID structure
- * @dentry - dentry to link newly created fid to
- *
- */
-
-struct v9fs_fid *v9fs_fid_create(struct v9fs_session_info *v9ses, int fid)
-{
-	struct v9fs_fid *new;
+	dent = dentry->d_fsdata;
+	if (!dent) {
+		dent = kmalloc(sizeof(struct v9fs_dentry), GFP_KERNEL);
+		if (!dent)
+			return -ENOMEM;
 
-	dprintk(DEBUG_9P, "fid create fid %d\n", fid);
-	new = kmalloc(sizeof(struct v9fs_fid), GFP_KERNEL);
-	if (new == NULL) {
-		dprintk(DEBUG_ERROR, "Out of Memory\n");
-		return ERR_PTR(-ENOMEM);
+		spin_lock_init(&dent->lock);
+		INIT_LIST_HEAD(&dent->fidlist);
+		dentry->d_fsdata = dent;
 	}
 
-	new->fid = fid;
-	new->v9ses = v9ses;
-	new->fidopen = 0;
-	new->fidclunked = 0;
-	new->iounit = 0;
-	new->rdir_pos = 0;
-	new->rdir_fcall = NULL;
-	init_MUTEX(&new->lock);
-	INIT_LIST_HEAD(&new->list);
-
-	return new;
-}
-
-/**
- * v9fs_fid_destroy - deallocate a FID structure
- * @fid: fid to destroy
- *
- */
+	spin_lock(&dent->lock);
+	list_add(&fid->dlist, &dent->fidlist);
+	spin_unlock(&dent->lock);
 
-void v9fs_fid_destroy(struct v9fs_fid *fid)
-{
-	list_del(&fid->list);
-	kfree(fid);
+	return 0;
 }
 
 /**
@@ -114,30 +76,42 @@ void v9fs_fid_destroy(struct v9fs_fid *fid)
  *
  */
 
-struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry)
+struct p9_fid *v9fs_fid_lookup(struct dentry *dentry)
 {
-	struct list_head *fid_list = (struct list_head *)dentry->d_fsdata;
-	struct v9fs_fid *return_fid = NULL;
-
-	dprintk(DEBUG_9P, " dentry: %s (%p)\n", dentry->d_iname, dentry);
-
-	if (fid_list)
-		return_fid = list_entry(fid_list->next, struct v9fs_fid, list);
+	struct v9fs_dentry *dent;
+	struct p9_fid *fid;
+
+	P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+	dent = dentry->d_fsdata;
+	if (dent)
+		fid = list_entry(dent->fidlist.next, struct p9_fid, dlist);
+	else
+		fid = ERR_PTR(-EBADF);
+
+	P9_DPRINTK(P9_DEBUG_VFS, " fid: %p\n", fid);
+	return fid;
+}
 
-	if (!return_fid) {
-		dprintk(DEBUG_ERROR, "Couldn't find a fid in dentry\n");
-		return_fid = ERR_PTR(-EBADF);
+struct p9_fid *v9fs_fid_lookup_remove(struct dentry *dentry)
+{
+	struct p9_fid *fid;
+	struct v9fs_dentry *dent;
+
+	dent = dentry->d_fsdata;
+	fid = v9fs_fid_lookup(dentry);
+	if (!IS_ERR(fid)) {
+		spin_lock(&dent->lock);
+		list_del(&fid->dlist);
+		spin_unlock(&dent->lock);
 	}
 
-	if(down_interruptible(&return_fid->lock))
-		return ERR_PTR(-EINTR);
-
-	return return_fid;
+	return fid;
 }
 
+
 /**
  * v9fs_fid_clone - lookup the fid for a dentry, clone a private copy and
- * 			release it
+ * 	release it
  * @dentry: dentry to look for fid in
  *
  * find a fid in the dentry and then clone to a new private fid
@@ -146,49 +120,15 @@ struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry)
  *
  */
 
-struct v9fs_fid *v9fs_fid_clone(struct dentry *dentry)
+struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
 {
-	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
-	struct v9fs_fid *base_fid, *new_fid = ERR_PTR(-EBADF);
-	struct v9fs_fcall *fcall = NULL;
-	int fid, err;
-
-	base_fid = v9fs_fid_lookup(dentry);
-
-	if(IS_ERR(base_fid))
-		return base_fid;
-
-	if(base_fid) {  /* clone fid */
-		fid = v9fs_get_idpool(&v9ses->fidpool);
-		if (fid < 0) {
-			eprintk(KERN_WARNING, "newfid fails!\n");
-			new_fid = ERR_PTR(-ENOSPC);
-			goto Release_Fid;
-		}
-
-		err = v9fs_t_walk(v9ses, base_fid->fid, fid, NULL, &fcall);
-		if (err < 0) {
-			dprintk(DEBUG_ERROR, "clone walk didn't work\n");
-			v9fs_put_idpool(fid, &v9ses->fidpool);
-			new_fid = ERR_PTR(err);
-			goto Free_Fcall;
-		}
-		new_fid = v9fs_fid_create(v9ses, fid);
-		if (new_fid == NULL) {
-			dprintk(DEBUG_ERROR, "out of memory\n");
-			new_fid = ERR_PTR(-ENOMEM);
-		}
-Free_Fcall:
-		kfree(fcall);
-	}
+	struct p9_fid *ofid, *fid;
 
-Release_Fid:
-	up(&base_fid->lock);
-	return new_fid;
-}
+	P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+	ofid = v9fs_fid_lookup(dentry);
+	if (IS_ERR(ofid))
+		return ofid;
 
-void v9fs_fid_clunk(struct v9fs_session_info *v9ses, struct v9fs_fid *fid)
-{
-	v9fs_t_clunk(v9ses, fid->fid);
-	v9fs_fid_destroy(fid);
+	fid = p9_client_walk(ofid, 0, NULL, 1);
+	return fid;
 }
diff --git a/fs/9p/fid.h b/fs/9p/fid.h
index 48fc170..47a0ba7 100644
--- a/fs/9p/fid.h
+++ b/fs/9p/fid.h
@@ -22,41 +22,12 @@
 
 #include <linux/list.h>
 
-#define FID_OP   0
-#define FID_WALK 1
-#define FID_CREATE 2
-
-struct v9fs_fid {
-	struct list_head list;	 /* list of fids associated with a dentry */
-	struct list_head active; /* XXX - debug */
-
-	struct semaphore lock;
-
-	u32 fid;
-	unsigned char fidopen;	  /* set when fid is opened */
-	unsigned char fidclunked; /* set when fid has already been clunked */
-
-	struct v9fs_qid qid;
-	u32 iounit;
-
-	/* readdir stuff */
-	int rdir_fpos;
-	loff_t rdir_pos;
-	struct v9fs_fcall *rdir_fcall;
-
-	/* management stuff */
-	uid_t uid;		/* user associated with this fid */
-
-	/* private data */
-	struct file *filp;	/* backpointer to File struct for open files */
-	struct v9fs_session_info *v9ses;	/* session info for this FID */
+struct v9fs_dentry {
+	spinlock_t lock; /* protect fidlist */
+	struct list_head fidlist;
 };
 
-struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry);
-struct v9fs_fid *v9fs_fid_get_created(struct dentry *);
-void v9fs_fid_destroy(struct v9fs_fid *fid);
-struct v9fs_fid *v9fs_fid_create(struct v9fs_session_info *, int fid);
-int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry);
-struct v9fs_fid *v9fs_fid_clone(struct dentry *dentry);
-void v9fs_fid_clunk(struct v9fs_session_info *v9ses, struct v9fs_fid *fid);
-
+struct p9_fid *v9fs_fid_lookup(struct dentry *dentry);
+struct p9_fid *v9fs_fid_lookup_remove(struct dentry *dentry);
+struct p9_fid *v9fs_fid_clone(struct dentry *dentry);
+int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);
diff --git a/fs/9p/mux.c b/fs/9p/mux.c
deleted file mode 100644
index c783874..0000000
--- a/fs/9p/mux.c
+++ /dev/null
@@ -1,1033 +0,0 @@
-/*
- * linux/fs/9p/mux.c
- *
- * Protocol Multiplexer
- *
- *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- *  Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
- */
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/poll.h>
-#include <linux/kthread.h>
-#include <linux/idr.h>
-#include <linux/mutex.h>
-
-#include "debug.h"
-#include "v9fs.h"
-#include "9p.h"
-#include "conv.h"
-#include "transport.h"
-#include "mux.h"
-
-#define ERREQFLUSH	1
-#define SCHED_TIMEOUT	10
-#define MAXPOLLWADDR	2
-
-enum {
-	Rworksched = 1,		/* read work scheduled or running */
-	Rpending = 2,		/* can read */
-	Wworksched = 4,		/* write work scheduled or running */
-	Wpending = 8,		/* can write */
-};
-
-enum {
-	None,
-	Flushing,
-	Flushed,
-};
-
-struct v9fs_mux_poll_task;
-
-struct v9fs_req {
-	spinlock_t lock;
-	int tag;
-	struct v9fs_fcall *tcall;
-	struct v9fs_fcall *rcall;
-	int err;
-	v9fs_mux_req_callback cb;
-	void *cba;
-	int flush;
-	struct list_head req_list;
-};
-
-struct v9fs_mux_data {
-	spinlock_t lock;
-	struct list_head mux_list;
-	struct v9fs_mux_poll_task *poll_task;
-	int msize;
-	unsigned char *extended;
-	struct v9fs_transport *trans;
-	struct v9fs_idpool tagpool;
-	int err;
-	wait_queue_head_t equeue;
-	struct list_head req_list;
-	struct list_head unsent_req_list;
-	struct v9fs_fcall *rcall;
-	int rpos;
-	char *rbuf;
-	int wpos;
-	int wsize;
-	char *wbuf;
-	wait_queue_t poll_wait[MAXPOLLWADDR];
-	wait_queue_head_t *poll_waddr[MAXPOLLWADDR];
-	poll_table pt;
-	struct work_struct rq;
-	struct work_struct wq;
-	unsigned long wsched;
-};
-
-struct v9fs_mux_poll_task {
-	struct task_struct *task;
-	struct list_head mux_list;
-	int muxnum;
-};
-
-struct v9fs_mux_rpc {
-	struct v9fs_mux_data *m;
-	int err;
-	struct v9fs_fcall *tcall;
-	struct v9fs_fcall *rcall;
-	wait_queue_head_t wqueue;
-};
-
-static int v9fs_poll_proc(void *);
-static void v9fs_read_work(struct work_struct *work);
-static void v9fs_write_work(struct work_struct *work);
-static void v9fs_pollwait(struct file *filp, wait_queue_head_t * wait_address,
-			  poll_table * p);
-static u16 v9fs_mux_get_tag(struct v9fs_mux_data *);
-static void v9fs_mux_put_tag(struct v9fs_mux_data *, u16);
-
-static DEFINE_MUTEX(v9fs_mux_task_lock);
-static struct workqueue_struct *v9fs_mux_wq;
-
-static int v9fs_mux_num;
-static int v9fs_mux_poll_task_num;
-static struct v9fs_mux_poll_task v9fs_mux_poll_tasks[100];
-
-int v9fs_mux_global_init(void)
-{
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(v9fs_mux_poll_tasks); i++)
-		v9fs_mux_poll_tasks[i].task = NULL;
-
-	v9fs_mux_wq = create_workqueue("v9fs");
-	if (!v9fs_mux_wq) {
-		printk(KERN_WARNING "v9fs: mux: creating workqueue failed\n");
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-void v9fs_mux_global_exit(void)
-{
-	destroy_workqueue(v9fs_mux_wq);
-}
-
-/**
- * v9fs_mux_calc_poll_procs - calculates the number of polling procs
- * based on the number of mounted v9fs filesystems.
- *
- * The current implementation returns sqrt of the number of mounts.
- */
-static int v9fs_mux_calc_poll_procs(int muxnum)
-{
-	int n;
-
-	if (v9fs_mux_poll_task_num)
-		n = muxnum / v9fs_mux_poll_task_num +
-		    (muxnum % v9fs_mux_poll_task_num ? 1 : 0);
-	else
-		n = 1;
-
-	if (n > ARRAY_SIZE(v9fs_mux_poll_tasks))
-		n = ARRAY_SIZE(v9fs_mux_poll_tasks);
-
-	return n;
-}
-
-static int v9fs_mux_poll_start(struct v9fs_mux_data *m)
-{
-	int i, n;
-	struct v9fs_mux_poll_task *vpt, *vptlast;
-	struct task_struct *pproc;
-
-	dprintk(DEBUG_MUX, "mux %p muxnum %d procnum %d\n", m, v9fs_mux_num,
-		v9fs_mux_poll_task_num);
-	mutex_lock(&v9fs_mux_task_lock);
-
-	n = v9fs_mux_calc_poll_procs(v9fs_mux_num + 1);
-	if (n > v9fs_mux_poll_task_num) {
-		for (i = 0; i < ARRAY_SIZE(v9fs_mux_poll_tasks); i++) {
-			if (v9fs_mux_poll_tasks[i].task == NULL) {
-				vpt = &v9fs_mux_poll_tasks[i];
-				dprintk(DEBUG_MUX, "create proc %p\n", vpt);
-				pproc = kthread_create(v9fs_poll_proc, vpt,
-						   "v9fs-poll");
-
-				if (!IS_ERR(pproc)) {
-					vpt->task = pproc;
-					INIT_LIST_HEAD(&vpt->mux_list);
-					vpt->muxnum = 0;
-					v9fs_mux_poll_task_num++;
-					wake_up_process(vpt->task);
-				}
-				break;
-			}
-		}
-
-		if (i >= ARRAY_SIZE(v9fs_mux_poll_tasks))
-			dprintk(DEBUG_ERROR, "warning: no free poll slots\n");
-	}
-
-	n = (v9fs_mux_num + 1) / v9fs_mux_poll_task_num +
-	    ((v9fs_mux_num + 1) % v9fs_mux_poll_task_num ? 1 : 0);
-
-	vptlast = NULL;
-	for (i = 0; i < ARRAY_SIZE(v9fs_mux_poll_tasks); i++) {
-		vpt = &v9fs_mux_poll_tasks[i];
-		if (vpt->task != NULL) {
-			vptlast = vpt;
-			if (vpt->muxnum < n) {
-				dprintk(DEBUG_MUX, "put in proc %d\n", i);
-				list_add(&m->mux_list, &vpt->mux_list);
-				vpt->muxnum++;
-				m->poll_task = vpt;
-				memset(&m->poll_waddr, 0, sizeof(m->poll_waddr));
-				init_poll_funcptr(&m->pt, v9fs_pollwait);
-				break;
-			}
-		}
-	}
-
-	if (i >= ARRAY_SIZE(v9fs_mux_poll_tasks)) {
-		if (vptlast == NULL)
-			return -ENOMEM;
-
-		dprintk(DEBUG_MUX, "put in proc %d\n", i);
-		list_add(&m->mux_list, &vptlast->mux_list);
-		vptlast->muxnum++;
-		m->poll_task = vptlast;
-		memset(&m->poll_waddr, 0, sizeof(m->poll_waddr));
-		init_poll_funcptr(&m->pt, v9fs_pollwait);
-	}
-
-	v9fs_mux_num++;
-	mutex_unlock(&v9fs_mux_task_lock);
-
-	return 0;
-}
-
-static void v9fs_mux_poll_stop(struct v9fs_mux_data *m)
-{
-	int i;
-	struct v9fs_mux_poll_task *vpt;
-
-	mutex_lock(&v9fs_mux_task_lock);
-	vpt = m->poll_task;
-	list_del(&m->mux_list);
-	for(i = 0; i < ARRAY_SIZE(m->poll_waddr); i++) {
-		if (m->poll_waddr[i] != NULL) {
-			remove_wait_queue(m->poll_waddr[i], &m->poll_wait[i]);
-			m->poll_waddr[i] = NULL;
-		}
-	}
-	vpt->muxnum--;
-	if (!vpt->muxnum) {
-		dprintk(DEBUG_MUX, "destroy proc %p\n", vpt);
-		kthread_stop(vpt->task);
-		vpt->task = NULL;
-		v9fs_mux_poll_task_num--;
-	}
-	v9fs_mux_num--;
-	mutex_unlock(&v9fs_mux_task_lock);
-}
-
-/**
- * v9fs_mux_init - allocate and initialize the per-session mux data
- * Creates the polling task if this is the first session.
- *
- * @trans - transport structure
- * @msize - maximum message size
- * @extended - pointer to the extended flag
- */
-struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize,
-				    unsigned char *extended)
-{
-	int i, n;
-	struct v9fs_mux_data *m, *mtmp;
-
-	dprintk(DEBUG_MUX, "transport %p msize %d\n", trans, msize);
-	m = kmalloc(sizeof(struct v9fs_mux_data), GFP_KERNEL);
-	if (!m)
-		return ERR_PTR(-ENOMEM);
-
-	spin_lock_init(&m->lock);
-	INIT_LIST_HEAD(&m->mux_list);
-	m->msize = msize;
-	m->extended = extended;
-	m->trans = trans;
-	idr_init(&m->tagpool.pool);
-	init_MUTEX(&m->tagpool.lock);
-	m->err = 0;
-	init_waitqueue_head(&m->equeue);
-	INIT_LIST_HEAD(&m->req_list);
-	INIT_LIST_HEAD(&m->unsent_req_list);
-	m->rcall = NULL;
-	m->rpos = 0;
-	m->rbuf = NULL;
-	m->wpos = m->wsize = 0;
-	m->wbuf = NULL;
-	INIT_WORK(&m->rq, v9fs_read_work);
-	INIT_WORK(&m->wq, v9fs_write_work);
-	m->wsched = 0;
-	memset(&m->poll_waddr, 0, sizeof(m->poll_waddr));
-	m->poll_task = NULL;
-	n = v9fs_mux_poll_start(m);
-	if (n)
-		return ERR_PTR(n);
-
-	n = trans->poll(trans, &m->pt);
-	if (n & POLLIN) {
-		dprintk(DEBUG_MUX, "mux %p can read\n", m);
-		set_bit(Rpending, &m->wsched);
-	}
-
-	if (n & POLLOUT) {
-		dprintk(DEBUG_MUX, "mux %p can write\n", m);
-		set_bit(Wpending, &m->wsched);
-	}
-
-	for(i = 0; i < ARRAY_SIZE(m->poll_waddr); i++) {
-		if (IS_ERR(m->poll_waddr[i])) {
-			v9fs_mux_poll_stop(m);
-			mtmp = (void *)m->poll_waddr;	/* the error code */
-			kfree(m);
-			m = mtmp;
-			break;
-		}
-	}
-
-	return m;
-}
-
-/**
- * v9fs_mux_destroy - cancels all pending requests and frees mux resources
- */
-void v9fs_mux_destroy(struct v9fs_mux_data *m)
-{
-	dprintk(DEBUG_MUX, "mux %p prev %p next %p\n", m,
-		m->mux_list.prev, m->mux_list.next);
-	v9fs_mux_cancel(m, -ECONNRESET);
-
-	if (!list_empty(&m->req_list)) {
-		/* wait until all processes waiting on this session exit */
-		dprintk(DEBUG_MUX, "mux %p waiting for empty request queue\n",
-			m);
-		wait_event_timeout(m->equeue, (list_empty(&m->req_list)), 5000);
-		dprintk(DEBUG_MUX, "mux %p request queue empty: %d\n", m,
-			list_empty(&m->req_list));
-	}
-
-	v9fs_mux_poll_stop(m);
-	m->trans = NULL;
-
-	kfree(m);
-}
-
-/**
- * v9fs_pollwait - called by files poll operation to add v9fs-poll task
- * 	to files wait queue
- */
-static void
-v9fs_pollwait(struct file *filp, wait_queue_head_t * wait_address,
-	      poll_table * p)
-{
-	int i;
-	struct v9fs_mux_data *m;
-
-	m = container_of(p, struct v9fs_mux_data, pt);
-	for(i = 0; i < ARRAY_SIZE(m->poll_waddr); i++)
-		if (m->poll_waddr[i] == NULL)
-			break;
-
-	if (i >= ARRAY_SIZE(m->poll_waddr)) {
-		dprintk(DEBUG_ERROR, "not enough wait_address slots\n");
-		return;
-	}
-
-	m->poll_waddr[i] = wait_address;
-
-	if (!wait_address) {
-		dprintk(DEBUG_ERROR, "no wait_address\n");
-		m->poll_waddr[i] = ERR_PTR(-EIO);
-		return;
-	}
-
-	init_waitqueue_entry(&m->poll_wait[i], m->poll_task->task);
-	add_wait_queue(wait_address, &m->poll_wait[i]);
-}
-
-/**
- * v9fs_poll_mux - polls a mux and schedules read or write works if necessary
- */
-static void v9fs_poll_mux(struct v9fs_mux_data *m)
-{
-	int n;
-
-	if (m->err < 0)
-		return;
-
-	n = m->trans->poll(m->trans, NULL);
-	if (n < 0 || n & (POLLERR | POLLHUP | POLLNVAL)) {
-		dprintk(DEBUG_MUX, "error mux %p err %d\n", m, n);
-		if (n >= 0)
-			n = -ECONNRESET;
-		v9fs_mux_cancel(m, n);
-	}
-
-	if (n & POLLIN) {
-		set_bit(Rpending, &m->wsched);
-		dprintk(DEBUG_MUX, "mux %p can read\n", m);
-		if (!test_and_set_bit(Rworksched, &m->wsched)) {
-			dprintk(DEBUG_MUX, "schedule read work mux %p\n", m);
-			queue_work(v9fs_mux_wq, &m->rq);
-		}
-	}
-
-	if (n & POLLOUT) {
-		set_bit(Wpending, &m->wsched);
-		dprintk(DEBUG_MUX, "mux %p can write\n", m);
-		if ((m->wsize || !list_empty(&m->unsent_req_list))
-		    && !test_and_set_bit(Wworksched, &m->wsched)) {
-			dprintk(DEBUG_MUX, "schedule write work mux %p\n", m);
-			queue_work(v9fs_mux_wq, &m->wq);
-		}
-	}
-}
-
-/**
- * v9fs_poll_proc - polls all v9fs transports for new events and queues
- * 	the appropriate work to the work queue
- */
-static int v9fs_poll_proc(void *a)
-{
-	struct v9fs_mux_data *m, *mtmp;
-	struct v9fs_mux_poll_task *vpt;
-
-	vpt = a;
-	dprintk(DEBUG_MUX, "start %p %p\n", current, vpt);
-	while (!kthread_should_stop()) {
-		set_current_state(TASK_INTERRUPTIBLE);
-
-		list_for_each_entry_safe(m, mtmp, &vpt->mux_list, mux_list) {
-			v9fs_poll_mux(m);
-		}
-
-		dprintk(DEBUG_MUX, "sleeping...\n");
-		schedule_timeout(SCHED_TIMEOUT * HZ);
-	}
-
-	__set_current_state(TASK_RUNNING);
-	dprintk(DEBUG_MUX, "finish\n");
-	return 0;
-}
-
-/**
- * v9fs_write_work - called when a transport can send some data
- */
-static void v9fs_write_work(struct work_struct *work)
-{
-	int n, err;
-	struct v9fs_mux_data *m;
-	struct v9fs_req *req;
-
-	m = container_of(work, struct v9fs_mux_data, wq);
-
-	if (m->err < 0) {
-		clear_bit(Wworksched, &m->wsched);
-		return;
-	}
-
-	if (!m->wsize) {
-		if (list_empty(&m->unsent_req_list)) {
-			clear_bit(Wworksched, &m->wsched);
-			return;
-		}
-
-		spin_lock(&m->lock);
-again:
-		req = list_entry(m->unsent_req_list.next, struct v9fs_req,
-			       req_list);
-		list_move_tail(&req->req_list, &m->req_list);
-		if (req->err == ERREQFLUSH)
-			goto again;
-
-		m->wbuf = req->tcall->sdata;
-		m->wsize = req->tcall->size;
-		m->wpos = 0;
-		dump_data(m->wbuf, m->wsize);
-		spin_unlock(&m->lock);
-	}
-
-	dprintk(DEBUG_MUX, "mux %p pos %d size %d\n", m, m->wpos, m->wsize);
-	clear_bit(Wpending, &m->wsched);
-	err = m->trans->write(m->trans, m->wbuf + m->wpos, m->wsize - m->wpos);
-	dprintk(DEBUG_MUX, "mux %p sent %d bytes\n", m, err);
-	if (err == -EAGAIN) {
-		clear_bit(Wworksched, &m->wsched);
-		return;
-	}
-
-	if (err <= 0)
-		goto error;
-
-	m->wpos += err;
-	if (m->wpos == m->wsize)
-		m->wpos = m->wsize = 0;
-
-	if (m->wsize == 0 && !list_empty(&m->unsent_req_list)) {
-		if (test_and_clear_bit(Wpending, &m->wsched))
-			n = POLLOUT;
-		else
-			n = m->trans->poll(m->trans, NULL);
-
-		if (n & POLLOUT) {
-			dprintk(DEBUG_MUX, "schedule write work mux %p\n", m);
-			queue_work(v9fs_mux_wq, &m->wq);
-		} else
-			clear_bit(Wworksched, &m->wsched);
-	} else
-		clear_bit(Wworksched, &m->wsched);
-
-	return;
-
-      error:
-	v9fs_mux_cancel(m, err);
-	clear_bit(Wworksched, &m->wsched);
-}
-
-static void process_request(struct v9fs_mux_data *m, struct v9fs_req *req)
-{
-	int ecode;
-	struct v9fs_str *ename;
-
-	if (!req->err && req->rcall->id == RERROR) {
-		ecode = req->rcall->params.rerror.errno;
-		ename = &req->rcall->params.rerror.error;
-
-		dprintk(DEBUG_MUX, "Rerror %.*s\n", ename->len, ename->str);
-
-		if (*m->extended)
-			req->err = -ecode;
-
-		if (!req->err) {
-			req->err = v9fs_errstr2errno(ename->str, ename->len);
-
-			if (!req->err) {	/* string match failed */
-				PRINT_FCALL_ERROR("unknown error", req->rcall);
-			}
-
-			if (!req->err)
-				req->err = -ESERVERFAULT;
-		}
-	} else if (req->tcall && req->rcall->id != req->tcall->id + 1) {
-		dprintk(DEBUG_ERROR, "fcall mismatch: expected %d, got %d\n",
-			req->tcall->id + 1, req->rcall->id);
-		if (!req->err)
-			req->err = -EIO;
-	}
-}
-
-/**
- * v9fs_read_work - called when there is some data to be read from a transport
- */
-static void v9fs_read_work(struct work_struct *work)
-{
-	int n, err;
-	struct v9fs_mux_data *m;
-	struct v9fs_req *req, *rptr, *rreq;
-	struct v9fs_fcall *rcall;
-	char *rbuf;
-
-	m = container_of(work, struct v9fs_mux_data, rq);
-
-	if (m->err < 0)
-		return;
-
-	rcall = NULL;
-	dprintk(DEBUG_MUX, "start mux %p pos %d\n", m, m->rpos);
-
-	if (!m->rcall) {
-		m->rcall =
-		    kmalloc(sizeof(struct v9fs_fcall) + m->msize, GFP_KERNEL);
-		if (!m->rcall) {
-			err = -ENOMEM;
-			goto error;
-		}
-
-		m->rbuf = (char *)m->rcall + sizeof(struct v9fs_fcall);
-		m->rpos = 0;
-	}
-
-	clear_bit(Rpending, &m->wsched);
-	err = m->trans->read(m->trans, m->rbuf + m->rpos, m->msize - m->rpos);
-	dprintk(DEBUG_MUX, "mux %p got %d bytes\n", m, err);
-	if (err == -EAGAIN) {
-		clear_bit(Rworksched, &m->wsched);
-		return;
-	}
-
-	if (err <= 0)
-		goto error;
-
-	m->rpos += err;
-	while (m->rpos > 4) {
-		n = le32_to_cpu(*(__le32 *) m->rbuf);
-		if (n >= m->msize) {
-			dprintk(DEBUG_ERROR,
-				"requested packet size too big: %d\n", n);
-			err = -EIO;
-			goto error;
-		}
-
-		if (m->rpos < n)
-			break;
-
-		dump_data(m->rbuf, n);
-		err =
-		    v9fs_deserialize_fcall(m->rbuf, n, m->rcall, *m->extended);
-		if (err < 0) {
-			goto error;
-		}
-
-		if ((v9fs_debug_level&DEBUG_FCALL) == DEBUG_FCALL) {
-			char buf[150];
-
-			v9fs_printfcall(buf, sizeof(buf), m->rcall,
-				*m->extended);
-			printk(KERN_NOTICE ">>> %p %s\n", m, buf);
-		}
-
-		rcall = m->rcall;
-		rbuf = m->rbuf;
-		if (m->rpos > n) {
-			m->rcall = kmalloc(sizeof(struct v9fs_fcall) + m->msize,
-					   GFP_KERNEL);
-			if (!m->rcall) {
-				err = -ENOMEM;
-				goto error;
-			}
-
-			m->rbuf = (char *)m->rcall + sizeof(struct v9fs_fcall);
-			memmove(m->rbuf, rbuf + n, m->rpos - n);
-			m->rpos -= n;
-		} else {
-			m->rcall = NULL;
-			m->rbuf = NULL;
-			m->rpos = 0;
-		}
-
-		dprintk(DEBUG_MUX, "mux %p fcall id %d tag %d\n", m, rcall->id,
-			rcall->tag);
-
-		req = NULL;
-		spin_lock(&m->lock);
-		list_for_each_entry_safe(rreq, rptr, &m->req_list, req_list) {
-			if (rreq->tag == rcall->tag) {
-				req = rreq;
-				if (req->flush != Flushing)
-					list_del(&req->req_list);
-				break;
-			}
-		}
-		spin_unlock(&m->lock);
-
-		if (req) {
-			req->rcall = rcall;
-			process_request(m, req);
-
-			if (req->flush != Flushing) {
-				if (req->cb)
-					(*req->cb) (req, req->cba);
-				else
-					kfree(req->rcall);
-
-				wake_up(&m->equeue);
-			}
-		} else {
-			if (err >= 0 && rcall->id != RFLUSH)
-				dprintk(DEBUG_ERROR,
-					"unexpected response mux %p id %d tag %d\n",
-					m, rcall->id, rcall->tag);
-			kfree(rcall);
-		}
-	}
-
-	if (!list_empty(&m->req_list)) {
-		if (test_and_clear_bit(Rpending, &m->wsched))
-			n = POLLIN;
-		else
-			n = m->trans->poll(m->trans, NULL);
-
-		if (n & POLLIN) {
-			dprintk(DEBUG_MUX, "schedule read work mux %p\n", m);
-			queue_work(v9fs_mux_wq, &m->rq);
-		} else
-			clear_bit(Rworksched, &m->wsched);
-	} else
-		clear_bit(Rworksched, &m->wsched);
-
-	return;
-
-      error:
-	v9fs_mux_cancel(m, err);
-	clear_bit(Rworksched, &m->wsched);
-}
-
-/**
- * v9fs_send_request - send 9P request
- * The function can sleep until the request is scheduled for sending.
- * The function can be interrupted. Return from the function is not
- * a guarantee that the request is sent successfully. Can return errors
- * that can be retrieved by PTR_ERR macros.
- *
- * @m: mux data
- * @tc: request to be sent
- * @cb: callback function to call when response is received
- * @cba: parameter to pass to the callback function
- */
-static struct v9fs_req *v9fs_send_request(struct v9fs_mux_data *m,
-					  struct v9fs_fcall *tc,
-					  v9fs_mux_req_callback cb, void *cba)
-{
-	int n;
-	struct v9fs_req *req;
-
-	dprintk(DEBUG_MUX, "mux %p task %p tcall %p id %d\n", m, current,
-		tc, tc->id);
-	if (m->err < 0)
-		return ERR_PTR(m->err);
-
-	req = kmalloc(sizeof(struct v9fs_req), GFP_KERNEL);
-	if (!req)
-		return ERR_PTR(-ENOMEM);
-
-	if (tc->id == TVERSION)
-		n = V9FS_NOTAG;
-	else
-		n = v9fs_mux_get_tag(m);
-
-	if (n < 0)
-		return ERR_PTR(-ENOMEM);
-
-	v9fs_set_tag(tc, n);
-	if ((v9fs_debug_level&DEBUG_FCALL) == DEBUG_FCALL) {
-		char buf[150];
-
-		v9fs_printfcall(buf, sizeof(buf), tc, *m->extended);
-		printk(KERN_NOTICE "<<< %p %s\n", m, buf);
-	}
-
-	spin_lock_init(&req->lock);
-	req->tag = n;
-	req->tcall = tc;
-	req->rcall = NULL;
-	req->err = 0;
-	req->cb = cb;
-	req->cba = cba;
-	req->flush = None;
-
-	spin_lock(&m->lock);
-	list_add_tail(&req->req_list, &m->unsent_req_list);
-	spin_unlock(&m->lock);
-
-	if (test_and_clear_bit(Wpending, &m->wsched))
-		n = POLLOUT;
-	else
-		n = m->trans->poll(m->trans, NULL);
-
-	if (n & POLLOUT && !test_and_set_bit(Wworksched, &m->wsched))
-		queue_work(v9fs_mux_wq, &m->wq);
-
-	return req;
-}
-
-static void v9fs_mux_free_request(struct v9fs_mux_data *m, struct v9fs_req *req)
-{
-	v9fs_mux_put_tag(m, req->tag);
-	kfree(req);
-}
-
-static void v9fs_mux_flush_cb(struct v9fs_req *freq, void *a)
-{
-	v9fs_mux_req_callback cb;
-	int tag;
-	struct v9fs_mux_data *m;
-	struct v9fs_req *req, *rreq, *rptr;
-
-	m = a;
-	dprintk(DEBUG_MUX, "mux %p tc %p rc %p err %d oldtag %d\n", m,
-		freq->tcall, freq->rcall, freq->err,
-		freq->tcall->params.tflush.oldtag);
-
-	spin_lock(&m->lock);
-	cb = NULL;
-	tag = freq->tcall->params.tflush.oldtag;
-	req = NULL;
-	list_for_each_entry_safe(rreq, rptr, &m->req_list, req_list) {
-		if (rreq->tag == tag) {
-			req = rreq;
-			list_del(&req->req_list);
-			break;
-		}
-	}
-	spin_unlock(&m->lock);
-
-	if (req) {
-		spin_lock(&req->lock);
-		req->flush = Flushed;
-		spin_unlock(&req->lock);
-
-		if (req->cb)
-			(*req->cb) (req, req->cba);
-		else
-			kfree(req->rcall);
-
-		wake_up(&m->equeue);
-	}
-
-	kfree(freq->tcall);
-	kfree(freq->rcall);
-	v9fs_mux_free_request(m, freq);
-}
-
-static int
-v9fs_mux_flush_request(struct v9fs_mux_data *m, struct v9fs_req *req)
-{
-	struct v9fs_fcall *fc;
-	struct v9fs_req *rreq, *rptr;
-
-	dprintk(DEBUG_MUX, "mux %p req %p tag %d\n", m, req, req->tag);
-
-	/* if a response was received for a request, do nothing */
-	spin_lock(&req->lock);
-	if (req->rcall || req->err) {
-		spin_unlock(&req->lock);
-		dprintk(DEBUG_MUX, "mux %p req %p response already received\n", m, req);
-		return 0;
-	}
-
-	req->flush = Flushing;
-	spin_unlock(&req->lock);
-
-	spin_lock(&m->lock);
-	/* if the request is not sent yet, just remove it from the list */
-	list_for_each_entry_safe(rreq, rptr, &m->unsent_req_list, req_list) {
-		if (rreq->tag == req->tag) {
-			dprintk(DEBUG_MUX, "mux %p req %p request is not sent yet\n", m, req);
-			list_del(&rreq->req_list);
-			req->flush = Flushed;
-			spin_unlock(&m->lock);
-			if (req->cb)
-				(*req->cb) (req, req->cba);
-			return 0;
-		}
-	}
-	spin_unlock(&m->lock);
-
-	clear_thread_flag(TIF_SIGPENDING);
-	fc = v9fs_create_tflush(req->tag);
-	v9fs_send_request(m, fc, v9fs_mux_flush_cb, m);
-	return 1;
-}
-
-static void
-v9fs_mux_rpc_cb(struct v9fs_req *req, void *a)
-{
-	struct v9fs_mux_rpc *r;
-
-	dprintk(DEBUG_MUX, "req %p r %p\n", req, a);
-	r = a;
-	r->rcall = req->rcall;
-	r->err = req->err;
-
-	if (req->flush!=None && !req->err)
-		r->err = -ERESTARTSYS;
-
-	wake_up(&r->wqueue);
-}
-
-/**
- * v9fs_mux_rpc - sends 9P request and waits until a response is available.
- *	The function can be interrupted.
- * @m: mux data
- * @tc: request to be sent
- * @rc: pointer where a pointer to the response is stored
- */
-int
-v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc,
-	     struct v9fs_fcall **rc)
-{
-	int err, sigpending;
-	unsigned long flags;
-	struct v9fs_req *req;
-	struct v9fs_mux_rpc r;
-
-	r.err = 0;
-	r.tcall = tc;
-	r.rcall = NULL;
-	r.m = m;
-	init_waitqueue_head(&r.wqueue);
-
-	if (rc)
-		*rc = NULL;
-
-	sigpending = 0;
-	if (signal_pending(current)) {
-		sigpending = 1;
-		clear_thread_flag(TIF_SIGPENDING);
-	}
-
-	req = v9fs_send_request(m, tc, v9fs_mux_rpc_cb, &r);
-	if (IS_ERR(req)) {
-		err = PTR_ERR(req);
-		dprintk(DEBUG_MUX, "error %d\n", err);
-		return err;
-	}
-
-	err = wait_event_interruptible(r.wqueue, r.rcall != NULL || r.err < 0);
-	if (r.err < 0)
-		err = r.err;
-
-	if (err == -ERESTARTSYS && m->trans->status == Connected && m->err == 0) {
-		if (v9fs_mux_flush_request(m, req)) {
-			/* wait until we get response of the flush message */
-			do {
-				clear_thread_flag(TIF_SIGPENDING);
-				err = wait_event_interruptible(r.wqueue,
-					r.rcall || r.err);
-			} while (!r.rcall && !r.err && err==-ERESTARTSYS &&
-				m->trans->status==Connected && !m->err);
-
-			err = -ERESTARTSYS;
-		}
-		sigpending = 1;
-	}
-
-	if (sigpending) {
-		spin_lock_irqsave(&current->sighand->siglock, flags);
-		recalc_sigpending();
-		spin_unlock_irqrestore(&current->sighand->siglock, flags);
-	}
-
-	if (rc)
-		*rc = r.rcall;
-	else
-		kfree(r.rcall);
-
-	v9fs_mux_free_request(m, req);
-	if (err > 0)
-		err = -EIO;
-
-	return err;
-}
-
-#if 0
-/**
- * v9fs_mux_rpcnb - sends 9P request without waiting for response.
- * @m: mux data
- * @tc: request to be sent
- * @cb: callback function to be called when response arrives
- * @cba: value to pass to the callback function
- */
-int v9fs_mux_rpcnb(struct v9fs_mux_data *m, struct v9fs_fcall *tc,
-		   v9fs_mux_req_callback cb, void *a)
-{
-	int err;
-	struct v9fs_req *req;
-
-	req = v9fs_send_request(m, tc, cb, a);
-	if (IS_ERR(req)) {
-		err = PTR_ERR(req);
-		dprintk(DEBUG_MUX, "error %d\n", err);
-		return PTR_ERR(req);
-	}
-
-	dprintk(DEBUG_MUX, "mux %p tc %p tag %d\n", m, tc, req->tag);
-	return 0;
-}
-#endif  /*  0  */
-
-/**
- * v9fs_mux_cancel - cancel all pending requests with error
- * @m: mux data
- * @err: error code
- */
-void v9fs_mux_cancel(struct v9fs_mux_data *m, int err)
-{
-	struct v9fs_req *req, *rtmp;
-	LIST_HEAD(cancel_list);
-
-	dprintk(DEBUG_ERROR, "mux %p err %d\n", m, err);
-	m->err = err;
-	spin_lock(&m->lock);
-	list_for_each_entry_safe(req, rtmp, &m->req_list, req_list) {
-		list_move(&req->req_list, &cancel_list);
-	}
-	list_for_each_entry_safe(req, rtmp, &m->unsent_req_list, req_list) {
-		list_move(&req->req_list, &cancel_list);
-	}
-	spin_unlock(&m->lock);
-
-	list_for_each_entry_safe(req, rtmp, &cancel_list, req_list) {
-		list_del(&req->req_list);
-		if (!req->err)
-			req->err = err;
-
-		if (req->cb)
-			(*req->cb) (req, req->cba);
-		else
-			kfree(req->rcall);
-	}
-
-	wake_up(&m->equeue);
-}
-
-static u16 v9fs_mux_get_tag(struct v9fs_mux_data *m)
-{
-	int tag;
-
-	tag = v9fs_get_idpool(&m->tagpool);
-	if (tag < 0)
-		return V9FS_NOTAG;
-	else
-		return (u16) tag;
-}
-
-static void v9fs_mux_put_tag(struct v9fs_mux_data *m, u16 tag)
-{
-	if (tag != V9FS_NOTAG && v9fs_check_idpool(tag, &m->tagpool))
-		v9fs_put_idpool(tag, &m->tagpool);
-}
diff --git a/fs/9p/mux.h b/fs/9p/mux.h
deleted file mode 100644
index fb10c50..0000000
--- a/fs/9p/mux.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * linux/fs/9p/mux.h
- *
- * Multiplexer Definitions
- *
- *  Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
- *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
- */
-
-struct v9fs_mux_data;
-struct v9fs_req;
-
-/**
- * v9fs_mux_req_callback - callback function that is called when the
- * response of a request is received. The callback is called from
- * a workqueue and shouldn't block.
- *
- * @a - the pointer that was specified when the request was send to be
- *      passed to the callback
- * @tc - request call
- * @rc - response call
- * @err - error code (non-zero if error occured)
- */
-typedef void (*v9fs_mux_req_callback)(struct v9fs_req *req, void *a);
-
-int v9fs_mux_global_init(void);
-void v9fs_mux_global_exit(void);
-
-struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize,
-	unsigned char *extended);
-void v9fs_mux_destroy(struct v9fs_mux_data *);
-
-int v9fs_mux_send(struct v9fs_mux_data *m, struct v9fs_fcall *tc);
-struct v9fs_fcall *v9fs_mux_recv(struct v9fs_mux_data *m);
-int v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc, struct v9fs_fcall **rc);
-
-void v9fs_mux_flush(struct v9fs_mux_data *m, int sendflush);
-void v9fs_mux_cancel(struct v9fs_mux_data *m, int err);
-int v9fs_errstr2errno(char *errstr, int len);
diff --git a/fs/9p/trans_fd.c b/fs/9p/trans_fd.c
deleted file mode 100644
index 34d4335..0000000
--- a/fs/9p/trans_fd.c
+++ /dev/null
@@ -1,308 +0,0 @@
-/*
- * linux/fs/9p/trans_fd.c
- *
- * Fd transport layer.  Includes deprecated socket layer.
- *
- *  Copyright (C) 2006 by Russ Cox <rsc@swtch.com>
- *  Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net>
- *  Copyright (C) 2004-2005 by Eric Van Hensbergen <ericvh@gmail.com>
- *  Copyright (C) 1997-2002 by Ron Minnich <rminnich@sarnoff.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
- */
-
-#include <linux/in.h>
-#include <linux/module.h>
-#include <linux/net.h>
-#include <linux/ipv6.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/un.h>
-#include <asm/uaccess.h>
-#include <linux/inet.h>
-#include <linux/idr.h>
-#include <linux/file.h>
-
-#include "debug.h"
-#include "v9fs.h"
-#include "transport.h"
-
-#define V9FS_PORT 564
-
-struct v9fs_trans_fd {
-	struct file *rd;
-	struct file *wr;
-};
-
-/**
- * v9fs_fd_read- read from a fd
- * @v9ses: session information
- * @v: buffer to receive data into
- * @len: size of receive buffer
- *
- */
-static int v9fs_fd_read(struct v9fs_transport *trans, void *v, int len)
-{
-	int ret;
-	struct v9fs_trans_fd *ts;
-
-	if (!trans || trans->status == Disconnected || !(ts = trans->priv))
-		return -EREMOTEIO;
-
-	if (!(ts->rd->f_flags & O_NONBLOCK))
-		dprintk(DEBUG_ERROR, "blocking read ...\n");
-
-	ret = kernel_read(ts->rd, ts->rd->f_pos, v, len);
-	if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN)
-		trans->status = Disconnected;
-	return ret;
-}
-
-/**
- * v9fs_fd_write - write to a socket
- * @v9ses: session information
- * @v: buffer to send data from
- * @len: size of send buffer
- *
- */
-static int v9fs_fd_write(struct v9fs_transport *trans, void *v, int len)
-{
-	int ret;
-	mm_segment_t oldfs;
-	struct v9fs_trans_fd *ts;
-
-	if (!trans || trans->status == Disconnected || !(ts = trans->priv))
-		return -EREMOTEIO;
-
-	if (!(ts->wr->f_flags & O_NONBLOCK))
-		dprintk(DEBUG_ERROR, "blocking write ...\n");
-
-	oldfs = get_fs();
-	set_fs(get_ds());
-	/* The cast to a user pointer is valid due to the set_fs() */
-	ret = vfs_write(ts->wr, (void __user *)v, len, &ts->wr->f_pos);
-	set_fs(oldfs);
-
-	if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN)
-		trans->status = Disconnected;
-	return ret;
-}
-
-static unsigned int
-v9fs_fd_poll(struct v9fs_transport *trans, struct poll_table_struct *pt)
-{
-	int ret, n;
-	struct v9fs_trans_fd *ts;
-	mm_segment_t oldfs;
-
-	if (!trans || trans->status != Connected || !(ts = trans->priv))
-		return -EREMOTEIO;
-
-	if (!ts->rd->f_op || !ts->rd->f_op->poll)
-		return -EIO;
-
-	if (!ts->wr->f_op || !ts->wr->f_op->poll)
-		return -EIO;
-
-	oldfs = get_fs();
-	set_fs(get_ds());
-
-	ret = ts->rd->f_op->poll(ts->rd, pt);
-	if (ret < 0)
-		goto end;
-
-	if (ts->rd != ts->wr) {
-		n = ts->wr->f_op->poll(ts->wr, pt);
-		if (n < 0) {
-			ret = n;
-			goto end;
-		}
-		ret = (ret & ~POLLOUT) | (n & ~POLLIN);
-	}
-
-      end:
-	set_fs(oldfs);
-	return ret;
-}
-
-static int v9fs_fd_open(struct v9fs_session_info *v9ses, int rfd, int wfd)
-{
-	struct v9fs_transport *trans = v9ses->transport;
-	struct v9fs_trans_fd *ts = kmalloc(sizeof(struct v9fs_trans_fd),
-					   GFP_KERNEL);
-	if (!ts)
-		return -ENOMEM;
-
-	ts->rd = fget(rfd);
-	ts->wr = fget(wfd);
-	if (!ts->rd || !ts->wr) {
-		if (ts->rd)
-			fput(ts->rd);
-		if (ts->wr)
-			fput(ts->wr);
-		kfree(ts);
-		return -EIO;
-	}
-
-	trans->priv = ts;
-	trans->status = Connected;
-
-	return 0;
-}
-
-static int v9fs_fd_init(struct v9fs_session_info *v9ses, const char *addr,
-			char *data)
-{
-	if (v9ses->rfdno == ~0 || v9ses->wfdno == ~0) {
-		printk(KERN_ERR "v9fs: Insufficient options for proto=fd\n");
-		return -ENOPROTOOPT;
-	}
-
-	return v9fs_fd_open(v9ses, v9ses->rfdno, v9ses->wfdno);
-}
-
-static int v9fs_socket_open(struct v9fs_session_info *v9ses,
-			    struct socket *csocket)
-{
-	int fd, ret;
-
-	csocket->sk->sk_allocation = GFP_NOIO;
-	if ((fd = sock_map_fd(csocket)) < 0) {
-		eprintk(KERN_ERR, "v9fs_socket_open: failed to map fd\n");
-		ret = fd;
-	      release_csocket:
-		sock_release(csocket);
-		return ret;
-	}
-
-	if ((ret = v9fs_fd_open(v9ses, fd, fd)) < 0) {
-		sockfd_put(csocket);
-		eprintk(KERN_ERR, "v9fs_socket_open: failed to open fd\n");
-		goto release_csocket;
-	}
-
-	((struct v9fs_trans_fd *)v9ses->transport->priv)->rd->f_flags |=
-	    O_NONBLOCK;
-	return 0;
-}
-
-static int v9fs_tcp_init(struct v9fs_session_info *v9ses, const char *addr,
-			 char *data)
-{
-	int ret;
-	struct socket *csocket = NULL;
-	struct sockaddr_in sin_server;
-
-	sin_server.sin_family = AF_INET;
-	sin_server.sin_addr.s_addr = in_aton(addr);
-	sin_server.sin_port = htons(v9ses->port);
-	sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &csocket);
-
-	if (!csocket) {
-		eprintk(KERN_ERR, "v9fs_trans_tcp: problem creating socket\n");
-		return -1;
-	}
-
-	ret = csocket->ops->connect(csocket,
-				    (struct sockaddr *)&sin_server,
-				    sizeof(struct sockaddr_in), 0);
-	if (ret < 0) {
-		eprintk(KERN_ERR,
-			"v9fs_trans_tcp: problem connecting socket to %s\n",
-			addr);
-		return ret;
-	}
-
-	return v9fs_socket_open(v9ses, csocket);
-}
-
-static int
-v9fs_unix_init(struct v9fs_session_info *v9ses, const char *addr, char *data)
-{
-	int ret;
-	struct socket *csocket;
-	struct sockaddr_un sun_server;
-
-	if (strlen(addr) > UNIX_PATH_MAX) {
-		eprintk(KERN_ERR, "v9fs_trans_unix: address too long: %s\n",
-			addr);
-		return -ENAMETOOLONG;
-	}
-
-	sun_server.sun_family = PF_UNIX;
-	strcpy(sun_server.sun_path, addr);
-	sock_create_kern(PF_UNIX, SOCK_STREAM, 0, &csocket);
-	ret = csocket->ops->connect(csocket, (struct sockaddr *)&sun_server,
-			sizeof(struct sockaddr_un) - 1, 0);
-	if (ret < 0) {
-		eprintk(KERN_ERR,
-			"v9fs_trans_unix: problem connecting socket: %s: %d\n",
-			addr, ret);
-		return ret;
-	}
-
-	return v9fs_socket_open(v9ses, csocket);
-}
-
-/**
- * v9fs_sock_close - shutdown socket
- * @trans: private socket structure
- *
- */
-static void v9fs_fd_close(struct v9fs_transport *trans)
-{
-	struct v9fs_trans_fd *ts;
-
-	if (!trans)
-		return;
-
-	ts = xchg(&trans->priv, NULL);
-
-	if (!ts)
-		return;
-
-	trans->status = Disconnected;
-	if (ts->rd)
-		fput(ts->rd);
-	if (ts->wr)
-		fput(ts->wr);
-	kfree(ts);
-}
-
-struct v9fs_transport v9fs_trans_fd = {
-	.init = v9fs_fd_init,
-	.write = v9fs_fd_write,
-	.read = v9fs_fd_read,
-	.close = v9fs_fd_close,
-	.poll = v9fs_fd_poll,
-};
-
-struct v9fs_transport v9fs_trans_tcp = {
-	.init = v9fs_tcp_init,
-	.write = v9fs_fd_write,
-	.read = v9fs_fd_read,
-	.close = v9fs_fd_close,
-	.poll = v9fs_fd_poll,
-};
-
-struct v9fs_transport v9fs_trans_unix = {
-	.init = v9fs_unix_init,
-	.write = v9fs_fd_write,
-	.read = v9fs_fd_read,
-	.close = v9fs_fd_close,
-	.poll = v9fs_fd_poll,
-};
diff --git a/fs/9p/transport.h b/fs/9p/transport.h
deleted file mode 100644
index b38a4b8..0000000
--- a/fs/9p/transport.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * linux/fs/9p/transport.h
- *
- * Transport Definition
- *
- *  Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
- *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
- */
-
-enum v9fs_transport_status {
-	Connected,
-	Disconnected,
-	Hung,
-};
-
-struct v9fs_transport {
-	enum v9fs_transport_status status;
-	void *priv;
-
-	int (*init) (struct v9fs_session_info *, const char *, char *);
-	int (*write) (struct v9fs_transport *, void *, int);
-	int (*read) (struct v9fs_transport *, void *, int);
-	void (*close) (struct v9fs_transport *);
-	unsigned int (*poll)(struct v9fs_transport *, struct poll_table_struct *);
-};
-
-extern struct v9fs_transport v9fs_trans_tcp;
-extern struct v9fs_transport v9fs_trans_unix;
-extern struct v9fs_transport v9fs_trans_fd;
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index 6ad6f19..0a7068e 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -29,16 +29,12 @@
 #include <linux/sched.h>
 #include <linux/parser.h>
 #include <linux/idr.h>
-
-#include "debug.h"
+#include <net/9p/9p.h>
+#include <net/9p/transport.h>
+#include <net/9p/conn.h>
+#include <net/9p/client.h>
 #include "v9fs.h"
-#include "9p.h"
 #include "v9fs_vfs.h"
-#include "transport.h"
-#include "mux.h"
-
-/* TODO: sysfs or debugfs interface */
-int v9fs_debug_level = 0;	/* feature-rific global debug level  */
 
 /*
   * Option Parsing (code inspired by NFS code)
@@ -47,12 +43,12 @@ int v9fs_debug_level = 0;	/* feature-rific global debug level  */
 
 enum {
 	/* Options that take integer arguments */
-	Opt_port, Opt_msize, Opt_uid, Opt_gid, Opt_afid, Opt_debug,
+	Opt_debug, Opt_port, Opt_msize, Opt_uid, Opt_gid, Opt_afid,
 	Opt_rfdno, Opt_wfdno,
 	/* String options */
 	Opt_uname, Opt_remotename,
 	/* Options that take no arguments */
-	Opt_legacy, Opt_nodevmap, Opt_unix, Opt_tcp, Opt_fd,
+	Opt_legacy, Opt_nodevmap, Opt_unix, Opt_tcp, Opt_fd, Opt_pci,
 	/* Cache options */
 	Opt_cache_loose,
 	/* Error token */
@@ -60,6 +56,7 @@ enum {
 };
 
 static match_table_t tokens = {
+	{Opt_debug, "debug=%x"},
 	{Opt_port, "port=%u"},
 	{Opt_msize, "msize=%u"},
 	{Opt_uid, "uid=%u"},
@@ -67,12 +64,14 @@ static match_table_t tokens = {
 	{Opt_afid, "afid=%u"},
 	{Opt_rfdno, "rfdno=%u"},
 	{Opt_wfdno, "wfdno=%u"},
-	{Opt_debug, "debug=%x"},
 	{Opt_uname, "uname=%s"},
 	{Opt_remotename, "aname=%s"},
 	{Opt_unix, "proto=unix"},
 	{Opt_tcp, "proto=tcp"},
 	{Opt_fd, "proto=fd"},
+#ifdef CONFIG_PCI_9P
+	{Opt_pci, "proto=pci"},
+#endif
 	{Opt_tcp, "tcp"},
 	{Opt_unix, "unix"},
 	{Opt_fd, "fd"},
@@ -83,6 +82,8 @@ static match_table_t tokens = {
 	{Opt_err, NULL}
 };
 
+extern struct p9_transport *p9pci_trans_create(void);
+
 /*
  *  Parse option string.
  */
@@ -122,12 +123,18 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
 		token = match_token(p, tokens, args);
 		if (token < Opt_uname) {
 			if ((ret = match_int(&args[0], &option)) < 0) {
-				dprintk(DEBUG_ERROR,
+				P9_DPRINTK(P9_DEBUG_ERROR,
 					"integer field, but no integer?\n");
 				continue;
 			}
 		}
 		switch (token) {
+		case Opt_debug:
+			v9ses->debug = option;
+#ifdef CONFIG_NET_9P_DEBUG
+			p9_debug_level = option;
+#endif
+			break;
 		case Opt_port:
 			v9ses->port = option;
 			break;
@@ -149,15 +156,15 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
 		case Opt_wfdno:
 			v9ses->wfdno = option;
 			break;
-		case Opt_debug:
-			v9ses->debug = option;
-			break;
 		case Opt_tcp:
 			v9ses->proto = PROTO_TCP;
 			break;
 		case Opt_unix:
 			v9ses->proto = PROTO_UNIX;
 			break;
+		case Opt_pci:
+			v9ses->proto = PROTO_PCI;
+			break;
 		case Opt_fd:
 			v9ses->proto = PROTO_FD;
 			break;
@@ -183,82 +190,6 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
 }
 
 /**
- * v9fs_inode2v9ses - safely extract v9fs session info from super block
- * @inode: inode to extract information from
- *
- * Paranoid function to extract v9ses information from superblock,
- * if anything is missing it will report an error.
- *
- */
-
-struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
-{
-	return (inode->i_sb->s_fs_info);
-}
-
-/**
- * v9fs_get_idpool - allocate numeric id from pool
- * @p - pool to allocate from
- *
- * XXX - This seems to be an awful generic function, should it be in idr.c with
- *            the lock included in struct idr?
- */
-
-int v9fs_get_idpool(struct v9fs_idpool *p)
-{
-	int i = 0;
-	int error;
-
-retry:
-	if (idr_pre_get(&p->pool, GFP_KERNEL) == 0)
-		return 0;
-
-	if (down_interruptible(&p->lock) == -EINTR) {
-		eprintk(KERN_WARNING, "Interrupted while locking\n");
-		return -1;
-	}
-
-	/* no need to store exactly p, we just need something non-null */
-	error = idr_get_new(&p->pool, p, &i);
-	up(&p->lock);
-
-	if (error == -EAGAIN)
-		goto retry;
-	else if (error)
-		return -1;
-
-	return i;
-}
-
-/**
- * v9fs_put_idpool - release numeric id from pool
- * @p - pool to allocate from
- *
- * XXX - This seems to be an awful generic function, should it be in idr.c with
- *            the lock included in struct idr?
- */
-
-void v9fs_put_idpool(int id, struct v9fs_idpool *p)
-{
-	if (down_interruptible(&p->lock) == -EINTR) {
-		eprintk(KERN_WARNING, "Interrupted while locking\n");
-		return;
-	}
-	idr_remove(&p->pool, id);
-	up(&p->lock);
-}
-
-/**
- * v9fs_check_idpool - check if the specified id is available
- * @id - id to check
- * @p - pool
- */
-int v9fs_check_idpool(int id, struct v9fs_idpool *p)
-{
-	return idr_find(&p->pool, id) != NULL;
-}
-
-/**
  * v9fs_session_init - initialize session
  * @v9ses: session information structure
  * @dev_name: device being mounted
@@ -266,25 +197,21 @@ int v9fs_check_idpool(int id, struct v9fs_idpool *p)
  *
  */
 
-int
-v9fs_session_init(struct v9fs_session_info *v9ses,
+struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
 		  const char *dev_name, char *data)
 {
-	struct v9fs_fcall *fcall = NULL;
-	struct v9fs_transport *trans_proto;
-	int n = 0;
-	int newfid = -1;
 	int retval = -EINVAL;
-	struct v9fs_str *version;
+	struct p9_transport *trans;
+	struct p9_fid *fid;
 
 	v9ses->name = __getname();
 	if (!v9ses->name)
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 
 	v9ses->remotename = __getname();
 	if (!v9ses->remotename) {
 		__putname(v9ses->name);
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 	}
 
 	strcpy(v9ses->name, V9FS_DEFUSER);
@@ -292,130 +219,60 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
 
 	v9fs_parse_options(data, v9ses);
 
-	/* set global debug level */
-	v9fs_debug_level = v9ses->debug;
-
-	/* id pools that are session-dependent: fids and tags */
-	idr_init(&v9ses->fidpool.pool);
-	init_MUTEX(&v9ses->fidpool.lock);
-
 	switch (v9ses->proto) {
 	case PROTO_TCP:
-		trans_proto = &v9fs_trans_tcp;
+		trans = p9_trans_create_tcp(dev_name, v9ses->port);
 		break;
 	case PROTO_UNIX:
-		trans_proto = &v9fs_trans_unix;
+		trans = p9_trans_create_unix(dev_name);
 		*v9ses->remotename = 0;
 		break;
 	case PROTO_FD:
-		trans_proto = &v9fs_trans_fd;
+		trans = p9_trans_create_fd(v9ses->rfdno, v9ses->wfdno);
 		*v9ses->remotename = 0;
 		break;
+#ifdef CONFIG_PCI_9P
+	case PROTO_PCI:
+		trans = p9pci_trans_create();
+		*v9ses->remotename = 0;
+		break;
+#endif
 	default:
 		printk(KERN_ERR "v9fs: Bad mount protocol %d\n", v9ses->proto);
 		retval = -ENOPROTOOPT;
-		goto SessCleanUp;
+		goto error;
 	};
 
-	v9ses->transport = kmalloc(sizeof(*v9ses->transport), GFP_KERNEL);
-	if (!v9ses->transport) {
-		retval = -ENOMEM;
-		goto SessCleanUp;
+	if (IS_ERR(trans)) {
+		retval = PTR_ERR(trans);
+		trans = NULL;
+		goto error;
 	}
 
-	memmove(v9ses->transport, trans_proto, sizeof(*v9ses->transport));
+	v9ses->clnt = p9_client_create(trans, v9ses->maxdata + P9_IOHDRSZ,
+		v9ses->extended);
 
-	if ((retval = v9ses->transport->init(v9ses, dev_name, data)) < 0) {
-		eprintk(KERN_ERR, "problem initializing transport\n");
-		goto SessCleanUp;
+	if (IS_ERR(v9ses->clnt)) {
+		retval = PTR_ERR(v9ses->clnt);
+		v9ses->clnt = NULL;
+		P9_DPRINTK(P9_DEBUG_ERROR, "problem initializing 9p client\n");
+		goto error;
 	}
 
-	v9ses->inprogress = 0;
-	v9ses->shutdown = 0;
-	v9ses->session_hung = 0;
-
-	v9ses->mux = v9fs_mux_init(v9ses->transport, v9ses->maxdata + V9FS_IOHDRSZ,
-		&v9ses->extended);
-
-	if (IS_ERR(v9ses->mux)) {
-		retval = PTR_ERR(v9ses->mux);
-		v9ses->mux = NULL;
-		dprintk(DEBUG_ERROR, "problem initializing mux\n");
-		goto SessCleanUp;
+	fid = p9_client_attach(v9ses->clnt, NULL, v9ses->name,
+							v9ses->remotename);
+	if (IS_ERR(fid)) {
+		retval = PTR_ERR(fid);
+		fid = NULL;
+		P9_DPRINTK(P9_DEBUG_ERROR, "cannot attach\n");
+		goto error;
 	}
 
-	if (v9ses->afid == ~0) {
-		if (v9ses->extended)
-			retval =
-			    v9fs_t_version(v9ses, v9ses->maxdata, "9P2000.u",
-					   &fcall);
-		else
-			retval = v9fs_t_version(v9ses, v9ses->maxdata, "9P2000",
-						&fcall);
-
-		if (retval < 0) {
-			dprintk(DEBUG_ERROR, "v9fs_t_version failed\n");
-			goto FreeFcall;
-		}
-
-		version = &fcall->params.rversion.version;
-		if (version->len==8 && !memcmp(version->str, "9P2000.u", 8)) {
-			dprintk(DEBUG_9P, "9P2000 UNIX extensions enabled\n");
-			v9ses->extended = 1;
-		} else if (version->len==6 && !memcmp(version->str, "9P2000", 6)) {
-			dprintk(DEBUG_9P, "9P2000 legacy mode enabled\n");
-			v9ses->extended = 0;
-		} else {
-			retval = -EREMOTEIO;
-			goto FreeFcall;
-		}
+	return fid;
 
-		n = fcall->params.rversion.msize;
-		kfree(fcall);
-
-		if (n < v9ses->maxdata)
-			v9ses->maxdata = n;
-	}
-
-	newfid = v9fs_get_idpool(&v9ses->fidpool);
-	if (newfid < 0) {
-		eprintk(KERN_WARNING, "couldn't allocate FID\n");
-		retval = -ENOMEM;
-		goto SessCleanUp;
-	}
-	/* it is a little bit ugly, but we have to prevent newfid */
-	/* being the same as afid, so if it is, get a new fid     */
-	if (v9ses->afid != ~0 && newfid == v9ses->afid) {
-		newfid = v9fs_get_idpool(&v9ses->fidpool);
-		if (newfid < 0) {
-			eprintk(KERN_WARNING, "couldn't allocate FID\n");
-			retval = -ENOMEM;
-			goto SessCleanUp;
-		}
-	}
-
-	if ((retval =
-	     v9fs_t_attach(v9ses, v9ses->name, v9ses->remotename, newfid,
-			   v9ses->afid, NULL))
-	    < 0) {
-		dprintk(DEBUG_ERROR, "cannot attach\n");
-		goto SessCleanUp;
-	}
-
-	if (v9ses->afid != ~0) {
-		dprintk(DEBUG_ERROR, "afid not equal to ~0\n");
-		if (v9fs_t_clunk(v9ses, v9ses->afid))
-			dprintk(DEBUG_ERROR, "clunk failed\n");
-	}
-
-	return newfid;
-
-      FreeFcall:
-	kfree(fcall);
-
-      SessCleanUp:
+error:
 	v9fs_session_close(v9ses);
-	return retval;
+	return ERR_PTR(retval);
 }
 
 /**
@@ -426,15 +283,9 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
 
 void v9fs_session_close(struct v9fs_session_info *v9ses)
 {
-	if (v9ses->mux) {
-		v9fs_mux_destroy(v9ses->mux);
-		v9ses->mux = NULL;
-	}
-
-	if (v9ses->transport) {
-		v9ses->transport->close(v9ses->transport);
-		kfree(v9ses->transport);
-		v9ses->transport = NULL;
+	if (v9ses->clnt) {
+		p9_client_destroy(v9ses->clnt);
+		v9ses->clnt = NULL;
 	}
 
 	__putname(v9ses->name);
@@ -446,9 +297,8 @@ void v9fs_session_close(struct v9fs_session_info *v9ses)
  * 	and cancel all pending requests.
  */
 void v9fs_session_cancel(struct v9fs_session_info *v9ses) {
-	dprintk(DEBUG_ERROR, "cancel session %p\n", v9ses);
-	v9ses->transport->status = Disconnected;
-	v9fs_mux_cancel(v9ses->mux, -EIO);
+	P9_DPRINTK(P9_DEBUG_ERROR, "cancel session %p\n", v9ses);
+	p9_client_disconnect(v9ses->clnt);
 }
 
 extern int v9fs_error_init(void);
@@ -460,24 +310,9 @@ extern int v9fs_error_init(void);
 
 static int __init init_v9fs(void)
 {
-	int ret;
-
-	v9fs_error_init();
-
 	printk(KERN_INFO "Installing v9fs 9p2000 file system support\n");
 
-	ret = v9fs_mux_global_init();
-	if (ret) {
-		printk(KERN_WARNING "v9fs: starting mux failed\n");
-		return ret;
-	}
-	ret = register_filesystem(&v9fs_fs_type);
-	if (ret) {
-		printk(KERN_WARNING "v9fs: registering file system failed\n");
-		v9fs_mux_global_exit();
-	}
-
-	return ret;
+	return register_filesystem(&v9fs_fs_type);
 }
 
 /**
@@ -487,13 +322,13 @@ static int __init init_v9fs(void)
 
 static void __exit exit_v9fs(void)
 {
-	v9fs_mux_global_exit();
 	unregister_filesystem(&v9fs_fs_type);
 }
 
 module_init(init_v9fs)
 module_exit(exit_v9fs)
 
+MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>");
 MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>");
 MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>");
 MODULE_LICENSE("GPL");
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index 820bf5ca..abc4b16 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -22,16 +22,6 @@
  */
 
 /*
-  * Idpool structure provides lock and id management
-  *
-  */
-
-struct v9fs_idpool {
-	struct semaphore lock;
-	struct idr pool;
-};
-
-/*
   * Session structure provides information for an opened session
   *
   */
@@ -54,15 +44,7 @@ struct v9fs_session_info {
 	unsigned int uid;	/* default uid/muid for legacy support */
 	unsigned int gid;	/* default gid for legacy support */
 
-	/* book keeping */
-	struct v9fs_idpool fidpool;	/* The FID pool for file descriptors */
-
-	struct v9fs_transport *transport;
-	struct v9fs_mux_data *mux;
-
-	int inprogress;		/* session in progress => true */
-	int shutdown;		/* session shutting down. no more attaches. */
-	unsigned char session_hung;
+	struct p9_client *clnt;	/* 9p client */
 	struct dentry *debugfs_dir;
 };
 
@@ -71,6 +53,7 @@ enum {
 	PROTO_TCP,
 	PROTO_UNIX,
 	PROTO_FD,
+	PROTO_PCI,
 };
 
 /* possible values of ->cache */
@@ -82,12 +65,9 @@ enum {
 
 extern struct dentry *v9fs_debugfs_root;
 
-int v9fs_session_init(struct v9fs_session_info *, const char *, char *);
-struct v9fs_session_info *v9fs_inode2v9ses(struct inode *);
+struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,
+									char *);
 void v9fs_session_close(struct v9fs_session_info *v9ses);
-int v9fs_get_idpool(struct v9fs_idpool *p);
-void v9fs_put_idpool(int id, struct v9fs_idpool *p);
-int v9fs_check_idpool(int id, struct v9fs_idpool *p);
 void v9fs_session_cancel(struct v9fs_session_info *v9ses);
 
 #define V9FS_MAGIC 0x01021997
@@ -97,3 +77,7 @@ void v9fs_session_cancel(struct v9fs_session_info *v9ses);
 #define V9FS_DEFUSER	"nobody"
 #define V9FS_DEFANAME	""
 
+static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
+{
+	return (inode->i_sb->s_fs_info);
+}
diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h
index 6a82d39..fd01d90 100644
--- a/fs/9p/v9fs_vfs.h
+++ b/fs/9p/v9fs_vfs.h
@@ -45,10 +45,10 @@ extern struct dentry_operations v9fs_dentry_operations;
 extern struct dentry_operations v9fs_cached_dentry_operations;
 
 struct inode *v9fs_get_inode(struct super_block *sb, int mode);
-ino_t v9fs_qid2ino(struct v9fs_qid *qid);
-void v9fs_stat2inode(struct v9fs_stat *, struct inode *, struct super_block *);
+ino_t v9fs_qid2ino(struct p9_qid *qid);
+void v9fs_stat2inode(struct p9_stat *, struct inode *, struct super_block *);
 int v9fs_dir_release(struct inode *inode, struct file *filp);
 int v9fs_file_open(struct inode *inode, struct file *file);
-void v9fs_inode2stat(struct inode *inode, struct v9fs_stat *stat);
+void v9fs_inode2stat(struct inode *inode, struct p9_stat *stat);
 void v9fs_dentry_release(struct dentry *);
 int v9fs_uflags2omode(int uflags);
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c
index 9ac4ffe9..6248f0e 100644
--- a/fs/9p/vfs_addr.c
+++ b/fs/9p/vfs_addr.c
@@ -33,10 +33,10 @@
 #include <linux/pagemap.h>
 #include <linux/idr.h>
 #include <linux/sched.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
 
-#include "debug.h"
 #include "v9fs.h"
-#include "9p.h"
 #include "v9fs_vfs.h"
 #include "fid.h"
 
@@ -50,55 +50,26 @@
 
 static int v9fs_vfs_readpage(struct file *filp, struct page *page)
 {
-	char *buffer = NULL;
-	int retval = -EIO;
-	loff_t offset = page_offset(page);
-	int count = PAGE_CACHE_SIZE;
-	struct inode *inode = filp->f_path.dentry->d_inode;
-	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
-	int rsize = v9ses->maxdata - V9FS_IOHDRSZ;
-	struct v9fs_fid *v9f = filp->private_data;
-	struct v9fs_fcall *fcall = NULL;
-	int fid = v9f->fid;
-	int total = 0;
-	int result = 0;
-
-	dprintk(DEBUG_VFS, "\n");
+	int retval;
+	loff_t offset;
+	char *buffer;
+	struct p9_fid *fid;
 
+	P9_DPRINTK(P9_DEBUG_VFS, "\n");
+	fid = filp->private_data;
 	buffer = kmap(page);
-	do {
-		if (count < rsize)
-			rsize = count;
-
-		result = v9fs_t_read(v9ses, fid, offset, rsize, &fcall);
-
-		if (result < 0) {
-			printk(KERN_ERR "v9fs_t_read returned %d\n",
-			       result);
-
-			kfree(fcall);
-			goto UnmapAndUnlock;
-		} else
-			offset += result;
-
-		memcpy(buffer, fcall->params.rread.data, result);
-
-		count -= result;
-		buffer += result;
-		total += result;
-
-		kfree(fcall);
+	offset = page_offset(page);
 
-		if (result < rsize)
-			break;
-	} while (count);
+	retval = p9_client_readn(fid, buffer, offset, PAGE_CACHE_SIZE);
+	if (retval < 0)
+		goto done;
 
-	memset(buffer, 0, count);
+	memset(buffer + retval, 0, PAGE_CACHE_SIZE - retval);
 	flush_dcache_page(page);
 	SetPageUptodate(page);
 	retval = 0;
 
-UnmapAndUnlock:
+done:
 	kunmap(page);
 	unlock_page(page);
 	return retval;
diff --git a/fs/9p/vfs_dentry.c b/fs/9p/vfs_dentry.c
index d939604..f9534f1 100644
--- a/fs/9p/vfs_dentry.c
+++ b/fs/9p/vfs_dentry.c
@@ -34,10 +34,10 @@
 #include <linux/namei.h>
 #include <linux/idr.h>
 #include <linux/sched.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
 
-#include "debug.h"
 #include "v9fs.h"
-#include "9p.h"
 #include "v9fs_vfs.h"
 #include "fid.h"
 
@@ -52,7 +52,7 @@
 
 static int v9fs_dentry_delete(struct dentry *dentry)
 {
-	dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+	P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
 
 	return 1;
 }
@@ -69,7 +69,7 @@ static int v9fs_dentry_delete(struct dentry *dentry)
 static int v9fs_cached_dentry_delete(struct dentry *dentry)
 {
 	struct inode *inode = dentry->d_inode;
-	dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+	P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
 
 	if(!inode)
 		return 1;
@@ -85,26 +85,19 @@ static int v9fs_cached_dentry_delete(struct dentry *dentry)
 
 void v9fs_dentry_release(struct dentry *dentry)
 {
-	int err;
-
-	dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
-
-	if (dentry->d_fsdata != NULL) {
-		struct list_head *fid_list = dentry->d_fsdata;
-		struct v9fs_fid *temp = NULL;
-		struct v9fs_fid *current_fid = NULL;
-
-		list_for_each_entry_safe(current_fid, temp, fid_list, list) {
-			err = v9fs_t_clunk(current_fid->v9ses, current_fid->fid);
-
-			if (err < 0)
-				dprintk(DEBUG_ERROR, "clunk failed: %d name %s\n",
-					err, dentry->d_iname);
-
-			v9fs_fid_destroy(current_fid);
+	struct v9fs_dentry *dent;
+	struct p9_fid *temp, *current_fid;
+
+	P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+	dent = dentry->d_fsdata;
+	if (dent) {
+		list_for_each_entry_safe(current_fid, temp, &dent->fidlist,
+									dlist) {
+			p9_client_clunk(current_fid);
 		}
 
-		kfree(dentry->d_fsdata);	/* free the list_head */
+		kfree(dent);
+		dentry->d_fsdata = NULL;
 	}
 }
 
diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c
index 1dd86ee..0924d44 100644
--- a/fs/9p/vfs_dir.c
+++ b/fs/9p/vfs_dir.c
@@ -32,11 +32,10 @@
 #include <linux/sched.h>
 #include <linux/inet.h>
 #include <linux/idr.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
 
-#include "debug.h"
 #include "v9fs.h"
-#include "9p.h"
-#include "conv.h"
 #include "v9fs_vfs.h"
 #include "fid.h"
 
@@ -46,14 +45,14 @@
  *
  */
 
-static inline int dt_type(struct v9fs_stat *mistat)
+static inline int dt_type(struct p9_stat *mistat)
 {
 	unsigned long perm = mistat->mode;
 	int rettype = DT_REG;
 
-	if (perm & V9FS_DMDIR)
+	if (perm & P9_DMDIR)
 		rettype = DT_DIR;
-	if (perm & V9FS_DMSYMLINK)
+	if (perm & P9_DMSYMLINK)
 		rettype = DT_LNK;
 
 	return rettype;
@@ -69,106 +68,36 @@ static inline int dt_type(struct v9fs_stat *mistat)
 
 static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
 {
-	struct v9fs_fcall *fcall = NULL;
-	struct inode *inode = filp->f_path.dentry->d_inode;
-	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
-	struct v9fs_fid *file = filp->private_data;
-	unsigned int i, n, s;
-	int fid = -1;
-	int ret = 0;
-	struct v9fs_stat stat;
-	int over = 0;
-
-	dprintk(DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
-
-	fid = file->fid;
-
-	if (file->rdir_fcall && (filp->f_pos != file->rdir_pos)) {
-		kfree(file->rdir_fcall);
-		file->rdir_fcall = NULL;
-	}
-
-	if (file->rdir_fcall) {
-		n = file->rdir_fcall->params.rread.count;
-		i = file->rdir_fpos;
-		while (i < n) {
-			s = v9fs_deserialize_stat(
-				file->rdir_fcall->params.rread.data + i,
-				n - i, &stat, v9ses->extended);
-
-			if (s == 0) {
-				dprintk(DEBUG_ERROR,
-					"error while deserializing stat\n");
-				ret = -EIO;
-				goto FreeStructs;
-			}
-
-			over = filldir(dirent, stat.name.str, stat.name.len,
-				    filp->f_pos, v9fs_qid2ino(&stat.qid),
-				    dt_type(&stat));
-
-			if (over) {
-				file->rdir_fpos = i;
-				file->rdir_pos = filp->f_pos;
-				break;
-			}
-
-			i += s;
-			filp->f_pos += s;
-		}
-
-		if (!over) {
-			kfree(file->rdir_fcall);
-			file->rdir_fcall = NULL;
-		}
-	}
-
-	while (!over) {
-		ret = v9fs_t_read(v9ses, fid, filp->f_pos,
-			v9ses->maxdata-V9FS_IOHDRSZ, &fcall);
-		if (ret < 0) {
-			dprintk(DEBUG_ERROR, "error while reading: %d: %p\n",
-				ret, fcall);
-			goto FreeStructs;
-		} else if (ret == 0)
+	int over;
+	struct p9_fid *fid;
+	struct v9fs_session_info *v9ses;
+	struct inode *inode;
+	struct p9_stat *st;
+
+	P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
+	inode = filp->f_path.dentry->d_inode;
+	v9ses = v9fs_inode2v9ses(inode);
+	fid = filp->private_data;
+	while ((st = p9_client_dirread(fid, filp->f_pos)) != NULL) {
+		if (IS_ERR(st))
+			return PTR_ERR(st);
+
+		over = filldir(dirent, st->name.str, st->name.len, filp->f_pos,
+			v9fs_qid2ino(&st->qid), dt_type(st));
+
+		if (over)
 			break;
 
-		n = ret;
-		i = 0;
-		while (i < n) {
-			s = v9fs_deserialize_stat(fcall->params.rread.data + i,
-				n - i, &stat, v9ses->extended);
-
-			if (s == 0) {
-				dprintk(DEBUG_ERROR,
-					"error while deserializing stat\n");
-				return -EIO;
-			}
-
-			over = filldir(dirent, stat.name.str, stat.name.len,
-				    filp->f_pos, v9fs_qid2ino(&stat.qid),
-				    dt_type(&stat));
-
-			if (over) {
-				file->rdir_fcall = fcall;
-				file->rdir_fpos = i;
-				file->rdir_pos = filp->f_pos;
-				fcall = NULL;
-				break;
-			}
-
-			i += s;
-			filp->f_pos += s;
-		}
-
-		kfree(fcall);
+		filp->f_pos += st->size;
+		kfree(st);
+		st = NULL;
 	}
 
-      FreeStructs:
-	kfree(fcall);
-	return ret;
+	kfree(st);
+	return 0;
 }
 
+
 /**
  * v9fs_dir_release - close a directory
  * @inode: inode of the directory
@@ -178,29 +107,13 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
 
 int v9fs_dir_release(struct inode *inode, struct file *filp)
 {
-	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
-	struct v9fs_fid *fid = filp->private_data;
-	int fidnum = -1;
-
-	dprintk(DEBUG_VFS, "inode: %p filp: %p fid: %d\n", inode, filp,
-		fid->fid);
-	fidnum = fid->fid;
+	struct p9_fid *fid;
 
+	fid = filp->private_data;
+	P9_DPRINTK(P9_DEBUG_VFS,
+			"inode: %p filp: %p fid: %d\n", inode, filp, fid->fid);
 	filemap_write_and_wait(inode->i_mapping);
-
-	if (fidnum >= 0) {
-		dprintk(DEBUG_VFS, "fidopen: %d v9f->fid: %d\n", fid->fidopen,
-			fid->fid);
-
-		if (v9fs_t_clunk(v9ses, fidnum))
-			dprintk(DEBUG_ERROR, "clunk failed\n");
-
-		kfree(fid->rdir_fcall);
-		kfree(fid);
-
-		filp->private_data = NULL;
-	}
-
+	p9_client_clunk(fid);
 	return 0;
 }
 
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 6e7678e..2a40c29 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -34,10 +34,10 @@
 #include <linux/list.h>
 #include <asm/uaccess.h>
 #include <linux/idr.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
 
-#include "debug.h"
 #include "v9fs.h"
-#include "9p.h"
 #include "v9fs_vfs.h"
 #include "fid.h"
 
@@ -52,48 +52,40 @@ static const struct file_operations v9fs_cached_file_operations;
 
 int v9fs_file_open(struct inode *inode, struct file *file)
 {
-	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
-	struct v9fs_fid *vfid;
-	struct v9fs_fcall *fcall = NULL;
-	int omode;
 	int err;
+	struct v9fs_session_info *v9ses;
+	struct p9_fid *fid;
+	int omode;
 
-	dprintk(DEBUG_VFS, "inode: %p file: %p \n", inode, file);
-
-	vfid = v9fs_fid_clone(file->f_path.dentry);
-	if (IS_ERR(vfid))
-		return PTR_ERR(vfid);
-
+	P9_DPRINTK(P9_DEBUG_VFS, "inode: %p file: %p \n", inode, file);
+	v9ses = v9fs_inode2v9ses(inode);
 	omode = v9fs_uflags2omode(file->f_flags);
-	err = v9fs_t_open(v9ses, vfid->fid, omode, &fcall);
-	if (err < 0) {
-		PRINT_FCALL_ERROR("open failed", fcall);
-		goto Clunk_Fid;
+	fid = file->private_data;
+	if (!fid) {
+		fid = v9fs_fid_clone(file->f_path.dentry);
+		if (IS_ERR(fid))
+			return PTR_ERR(fid);
+
+		err = p9_client_open(fid, omode);
+		if (err < 0) {
+			p9_client_clunk(fid);
+			return err;
+		}
+		if (omode & P9_OTRUNC) {
+			inode->i_size = 0;
+			inode->i_blocks = 0;
+		}
 	}
 
-	file->private_data = vfid;
-	vfid->fidopen = 1;
-	vfid->fidclunked = 0;
-	vfid->iounit = fcall->params.ropen.iounit;
-	vfid->rdir_pos = 0;
-	vfid->rdir_fcall = NULL;
-	vfid->filp = file;
-	kfree(fcall);
-
-	if((vfid->qid.version) && (v9ses->cache)) {
-		dprintk(DEBUG_VFS, "cached");
+	file->private_data = fid;
+	if ((fid->qid.version) && (v9ses->cache)) {
+		P9_DPRINTK(P9_DEBUG_VFS, "cached");
 		/* enable cached file options */
 		if(file->f_op == &v9fs_file_operations)
 			file->f_op = &v9fs_cached_file_operations;
 	}
 
 	return 0;
-
-Clunk_Fid:
-	v9fs_fid_clunk(v9ses, vfid);
-	kfree(fcall);
-
-	return err;
 }
 
 /**
@@ -110,7 +102,7 @@ static int v9fs_file_lock(struct file *filp, int cmd, struct file_lock *fl)
 	int res = 0;
 	struct inode *inode = filp->f_path.dentry->d_inode;
 
-	dprintk(DEBUG_VFS, "filp: %p lock: %p\n", filp, fl);
+	P9_DPRINTK(P9_DEBUG_VFS, "filp: %p lock: %p\n", filp, fl);
 
 	/* No mandatory locks */
 	if ((inode->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID)
@@ -136,55 +128,16 @@ static ssize_t
 v9fs_file_read(struct file *filp, char __user * data, size_t count,
 	       loff_t * offset)
 {
-	struct inode *inode = filp->f_path.dentry->d_inode;
-	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
-	struct v9fs_fid *v9f = filp->private_data;
-	struct v9fs_fcall *fcall = NULL;
-	int fid = v9f->fid;
-	int rsize = 0;
-	int result = 0;
-	int total = 0;
-	int n;
-
-	dprintk(DEBUG_VFS, "\n");
-
-	rsize = v9ses->maxdata - V9FS_IOHDRSZ;
-	if (v9f->iounit != 0 && rsize > v9f->iounit)
-		rsize = v9f->iounit;
-
-	do {
-		if (count < rsize)
-			rsize = count;
+	int ret;
+	struct p9_fid *fid;
 
-		result = v9fs_t_read(v9ses, fid, *offset, rsize, &fcall);
+	P9_DPRINTK(P9_DEBUG_VFS, "\n");
+	fid = filp->private_data;
+	ret = p9_client_uread(fid, data, *offset, count);
+	if (ret > 0)
+		*offset += ret;
 
-		if (result < 0) {
-			printk(KERN_ERR "9P2000: v9fs_t_read returned %d\n",
-			       result);
-
-			kfree(fcall);
-			return total;
-		} else
-			*offset += result;
-
-		n = copy_to_user(data, fcall->params.rread.data, result);
-		if (n) {
-			dprintk(DEBUG_ERROR, "Problem copying to user %d\n", n);
-			kfree(fcall);
-			return -EFAULT;
-		}
-
-		count -= result;
-		data += result;
-		total += result;
-
-		kfree(fcall);
-
-		if (result < rsize)
-			break;
-	} while (count);
-
-	return total;
+	return ret;
 }
 
 /**
@@ -200,50 +153,25 @@ static ssize_t
 v9fs_file_write(struct file *filp, const char __user * data,
 		size_t count, loff_t * offset)
 {
+	int ret;
+	struct p9_fid *fid;
 	struct inode *inode = filp->f_path.dentry->d_inode;
-	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
-	struct v9fs_fid *v9fid = filp->private_data;
-	struct v9fs_fcall *fcall;
-	int fid = v9fid->fid;
-	int result = -EIO;
-	int rsize = 0;
-	int total = 0;
-
-	dprintk(DEBUG_VFS, "data %p count %d offset %x\n", data, (int)count,
-		(int)*offset);
-	rsize = v9ses->maxdata - V9FS_IOHDRSZ;
-	if (v9fid->iounit != 0 && rsize > v9fid->iounit)
-		rsize = v9fid->iounit;
-
-	do {
-		if (count < rsize)
-			rsize = count;
 
-		result = v9fs_t_write(v9ses, fid, *offset, rsize, data, &fcall);
-		if (result < 0) {
-			PRINT_FCALL_ERROR("error while writing", fcall);
-			kfree(fcall);
-			return result;
-		} else
-			*offset += result;
+	P9_DPRINTK(P9_DEBUG_VFS, "data %p count %d offset %x\n", data,
+		(int)count, (int)*offset);
 
-		kfree(fcall);
-		fcall = NULL;
+	fid = filp->private_data;
+	ret = p9_client_uwrite(fid, data, *offset, count);
+	if (ret > 0)
+		*offset += ret;
 
-		if (result != rsize) {
-			eprintk(KERN_ERR,
-				"short write: v9fs_t_write returned %d\n",
-				result);
-			break;
-		}
-
-		count -= result;
-		data += result;
-		total += result;
-	} while (count);
+	if (*offset > inode->i_size) {
+		inode->i_size = *offset;
+		inode->i_blocks = (inode->i_size + 512 - 1) >> 9;
+	}
 
 	invalidate_inode_pages2(inode->i_mapping);
-	return total;
+	return ret;
 }
 
 static const struct file_operations v9fs_cached_file_operations = {
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index c76cd8f..e5c45ee 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -34,10 +34,10 @@
 #include <linux/namei.h>
 #include <linux/idr.h>
 #include <linux/sched.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
 
-#include "debug.h"
 #include "v9fs.h"
-#include "9p.h"
 #include "v9fs_vfs.h"
 #include "fid.h"
 
@@ -58,27 +58,27 @@ static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
 	int res;
 	res = mode & 0777;
 	if (S_ISDIR(mode))
-		res |= V9FS_DMDIR;
+		res |= P9_DMDIR;
 	if (v9ses->extended) {
 		if (S_ISLNK(mode))
-			res |= V9FS_DMSYMLINK;
+			res |= P9_DMSYMLINK;
 		if (v9ses->nodev == 0) {
 			if (S_ISSOCK(mode))
-				res |= V9FS_DMSOCKET;
+				res |= P9_DMSOCKET;
 			if (S_ISFIFO(mode))
-				res |= V9FS_DMNAMEDPIPE;
+				res |= P9_DMNAMEDPIPE;
 			if (S_ISBLK(mode))
-				res |= V9FS_DMDEVICE;
+				res |= P9_DMDEVICE;
 			if (S_ISCHR(mode))
-				res |= V9FS_DMDEVICE;
+				res |= P9_DMDEVICE;
 		}
 
 		if ((mode & S_ISUID) == S_ISUID)
-			res |= V9FS_DMSETUID;
+			res |= P9_DMSETUID;
 		if ((mode & S_ISGID) == S_ISGID)
-			res |= V9FS_DMSETGID;
-		if ((mode & V9FS_DMLINK))
-			res |= V9FS_DMLINK;
+			res |= P9_DMSETGID;
+		if ((mode & P9_DMLINK))
+			res |= P9_DMLINK;
 	}
 
 	return res;
@@ -97,27 +97,27 @@ static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
 
 	res = mode & 0777;
 
-	if ((mode & V9FS_DMDIR) == V9FS_DMDIR)
+	if ((mode & P9_DMDIR) == P9_DMDIR)
 		res |= S_IFDIR;
-	else if ((mode & V9FS_DMSYMLINK) && (v9ses->extended))
+	else if ((mode & P9_DMSYMLINK) && (v9ses->extended))
 		res |= S_IFLNK;
-	else if ((mode & V9FS_DMSOCKET) && (v9ses->extended)
+	else if ((mode & P9_DMSOCKET) && (v9ses->extended)
 		 && (v9ses->nodev == 0))
 		res |= S_IFSOCK;
-	else if ((mode & V9FS_DMNAMEDPIPE) && (v9ses->extended)
+	else if ((mode & P9_DMNAMEDPIPE) && (v9ses->extended)
 		 && (v9ses->nodev == 0))
 		res |= S_IFIFO;
-	else if ((mode & V9FS_DMDEVICE) && (v9ses->extended)
+	else if ((mode & P9_DMDEVICE) && (v9ses->extended)
 		 && (v9ses->nodev == 0))
 		res |= S_IFBLK;
 	else
 		res |= S_IFREG;
 
 	if (v9ses->extended) {
-		if ((mode & V9FS_DMSETUID) == V9FS_DMSETUID)
+		if ((mode & P9_DMSETUID) == P9_DMSETUID)
 			res |= S_ISUID;
 
-		if ((mode & V9FS_DMSETGID) == V9FS_DMSETGID)
+		if ((mode & P9_DMSETGID) == P9_DMSETGID)
 			res |= S_ISGID;
 	}
 
@@ -132,26 +132,26 @@ int v9fs_uflags2omode(int uflags)
 	switch (uflags&3) {
 	default:
 	case O_RDONLY:
-		ret = V9FS_OREAD;
+		ret = P9_OREAD;
 		break;
 
 	case O_WRONLY:
-		ret = V9FS_OWRITE;
+		ret = P9_OWRITE;
 		break;
 
 	case O_RDWR:
-		ret = V9FS_ORDWR;
+		ret = P9_ORDWR;
 		break;
 	}
 
 	if (uflags & O_EXCL)
-		ret |= V9FS_OEXCL;
+		ret |= P9_OEXCL;
 
 	if (uflags & O_TRUNC)
-		ret |= V9FS_OTRUNC;
+		ret |= P9_OTRUNC;
 
 	if (uflags & O_APPEND)
-		ret |= V9FS_OAPPEND;
+		ret |= P9_OAPPEND;
 
 	return ret;
 }
@@ -164,7 +164,7 @@ int v9fs_uflags2omode(int uflags)
  */
 
 static void
-v9fs_blank_wstat(struct v9fs_wstat *wstat)
+v9fs_blank_wstat(struct p9_wstat *wstat)
 {
 	wstat->type = ~0;
 	wstat->dev = ~0;
@@ -197,7 +197,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
 	struct inode *inode;
 	struct v9fs_session_info *v9ses = sb->s_fs_info;
 
-	dprintk(DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
+	P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
 
 	inode = new_inode(sb);
 	if (inode) {
@@ -215,7 +215,8 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
 		case S_IFCHR:
 		case S_IFSOCK:
 			if(!v9ses->extended) {
-				dprintk(DEBUG_ERROR, "special files without extended mode\n");
+				P9_DPRINTK(P9_DEBUG_ERROR,
+				      "special files without extended mode\n");
 				return ERR_PTR(-EINVAL);
 			}
 			init_special_inode(inode, inode->i_mode,
@@ -227,7 +228,8 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
 			break;
 		case S_IFLNK:
 			if(!v9ses->extended) {
-				dprintk(DEBUG_ERROR, "extended modes used w/o 9P2000.u\n");
+				P9_DPRINTK(P9_DEBUG_ERROR,
+					"extended modes used w/o 9P2000.u\n");
 				return ERR_PTR(-EINVAL);
 			}
 			inode->i_op = &v9fs_symlink_inode_operations;
@@ -241,71 +243,19 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
 			inode->i_fop = &v9fs_dir_operations;
 			break;
 		default:
-			dprintk(DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
+			P9_DPRINTK(P9_DEBUG_ERROR,
+				"BAD mode 0x%x S_IFMT 0x%x\n",
 				mode, mode & S_IFMT);
 			return ERR_PTR(-EINVAL);
 		}
 	} else {
-		eprintk(KERN_WARNING, "Problem allocating inode\n");
+		P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n");
 		return ERR_PTR(-ENOMEM);
 	}
 	return inode;
 }
 
-static int
-v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name, u32 perm,
-	u8 mode, char *extension, u32 *fidp, struct v9fs_qid *qid, u32 *iounit)
-{
-	int fid;
-	int err;
-	struct v9fs_fcall *fcall;
-
-	fid = v9fs_get_idpool(&v9ses->fidpool);
-	if (fid < 0) {
-		eprintk(KERN_WARNING, "no free fids available\n");
-		return -ENOSPC;
-	}
-
-	err = v9fs_t_walk(v9ses, pfid, fid, NULL, &fcall);
-	if (err < 0) {
-		PRINT_FCALL_ERROR("clone error", fcall);
-		if (fcall && fcall->id == RWALK)
-			goto clunk_fid;
-		else
-			goto put_fid;
-	}
-	kfree(fcall);
-
-	err = v9fs_t_create(v9ses, fid, name, perm, mode, extension, &fcall);
-	if (err < 0) {
-		PRINT_FCALL_ERROR("create fails", fcall);
-		goto clunk_fid;
-	}
-
-	if (iounit)
-		*iounit = fcall->params.rcreate.iounit;
-
-	if (qid)
-		*qid = fcall->params.rcreate.qid;
-
-	if (fidp)
-		*fidp = fid;
-
-	kfree(fcall);
-	return 0;
-
-clunk_fid:
-	v9fs_t_clunk(v9ses, fid);
-	fid = V9FS_NOFID;
-
-put_fid:
-	if (fid != V9FS_NOFID)
-		v9fs_put_idpool(fid, &v9ses->fidpool);
-
-	kfree(fcall);
-	return err;
-}
-
+/*
 static struct v9fs_fid*
 v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
 {
@@ -355,23 +305,25 @@ error:
 	kfree(fcall);
 	return ERR_PTR(err);
 }
+*/
 
 static struct inode *
-v9fs_inode_from_fid(struct v9fs_session_info *v9ses, u32 fid,
+v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
 	struct super_block *sb)
 {
 	int err, umode;
 	struct inode *ret;
-	struct v9fs_fcall *fcall;
+	struct p9_stat *st;
 
 	ret = NULL;
-	err = v9fs_t_stat(v9ses, fid, &fcall);
-	if (err) {
-		PRINT_FCALL_ERROR("stat error", fcall);
+	st = p9_client_stat(fid);
+	if (IS_ERR(st)) {
+		err = PTR_ERR(st);
+		st = NULL;
 		goto error;
 	}
 
-	umode = p9mode2unixmode(v9ses, fcall->params.rstat.stat.mode);
+	umode = p9mode2unixmode(v9ses, st->mode);
 	ret = v9fs_get_inode(sb, umode);
 	if (IS_ERR(ret)) {
 		err = PTR_ERR(ret);
@@ -379,12 +331,13 @@ v9fs_inode_from_fid(struct v9fs_session_info *v9ses, u32 fid,
 		goto error;
 	}
 
-	v9fs_stat2inode(&fcall->params.rstat.stat, ret, sb);
-	kfree(fcall);
+	v9fs_stat2inode(st, ret, sb);
+	ret->i_ino = v9fs_qid2ino(&st->qid);
+	kfree(st);
 	return ret;
 
 error:
-	kfree(fcall);
+	kfree(st);
 	if (ret)
 		iput(ret);
 
@@ -401,43 +354,20 @@ error:
 
 static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
 {
-	struct v9fs_fcall *fcall = NULL;
-	struct super_block *sb = NULL;
-	struct v9fs_session_info *v9ses = NULL;
-	struct v9fs_fid *v9fid = NULL;
-	struct inode *file_inode = NULL;
-	int fid = -1;
-	int result = 0;
+	struct inode *file_inode;
+	struct v9fs_session_info *v9ses;
+	struct p9_fid *v9fid;
 
-	dprintk(DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
+	P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
 		rmdir);
 
 	file_inode = file->d_inode;
-	sb = file_inode->i_sb;
 	v9ses = v9fs_inode2v9ses(file_inode);
 	v9fid = v9fs_fid_clone(file);
 	if(IS_ERR(v9fid))
 		return PTR_ERR(v9fid);
 
-	fid = v9fid->fid;
-	if (fid < 0) {
-		dprintk(DEBUG_ERROR, "inode #%lu, no fid!\n",
-			file_inode->i_ino);
-		return -EBADF;
-	}
-
-	result = v9fs_t_remove(v9ses, fid, &fcall);
-	if (result < 0) {
-		PRINT_FCALL_ERROR("remove fails", fcall);
-		goto Error;
-	}
-
-	v9fs_put_idpool(fid, &v9ses->fidpool);
-	v9fs_fid_destroy(v9fid);
-
-Error:
-	kfree(fcall);
-	return result;
+	return p9_client_remove(v9fid);
 }
 
 static int
@@ -446,61 +376,59 @@ v9fs_open_created(struct inode *inode, struct file *file)
 	return 0;
 }
 
+
 /**
- * v9fs_vfs_create - VFS hook to create files
- * @inode: directory inode that is being deleted
- * @dentry:  dentry that is being deleted
- * @mode: create permissions
- * @nd: path information
+ * v9fs_create - Create a file
+ * @dentry:  dentry that is being created
+ * @perm: create permissions
+ * @mode: open mode
  *
  */
-
-static int
-v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
-		struct nameidata *nd)
+static struct p9_fid *
+v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
+		struct dentry *dentry, char *extension, u32 perm, u8 mode)
 {
 	int err;
-	u32 fid, perm, iounit;
-	int flags;
-	struct v9fs_session_info *v9ses;
-	struct v9fs_fid *dfid, *vfid, *ffid;
+	char *name;
+	struct p9_fid *dfid, *ofid, *fid;
 	struct inode *inode;
-	struct v9fs_qid qid;
-	struct file *filp;
 
-	inode = NULL;
-	vfid = NULL;
-	v9ses = v9fs_inode2v9ses(dir);
+	err = 0;
+	ofid = NULL;
+	fid = NULL;
+	name = (char *) dentry->d_name.name;
 	dfid = v9fs_fid_clone(dentry->d_parent);
 	if(IS_ERR(dfid)) {
 		err = PTR_ERR(dfid);
+		dfid = NULL;
 		goto error;
 	}
 
-	perm = unixmode2p9mode(v9ses, mode);
-	if (nd && nd->flags & LOOKUP_OPEN)
-		flags = nd->intent.open.flags - 1;
-	else
-		flags = O_RDWR;
-
-	err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
-		perm, v9fs_uflags2omode(flags), NULL, &fid, &qid, &iounit);
+	/* clone a fid to use for creation */
+	ofid = p9_client_walk(dfid, 0, NULL, 1);
+	if (IS_ERR(ofid)) {
+		err = PTR_ERR(ofid);
+		ofid = NULL;
+		goto error;
+	}
 
-	if (err)
-		goto clunk_dfid;
+	err = p9_client_fcreate(ofid, name, perm, mode, extension);
+	if (err < 0)
+		goto error;
 
-	vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry);
-	v9fs_fid_clunk(v9ses, dfid);
-	if (IS_ERR(vfid)) {
-		err = PTR_ERR(vfid);
-		vfid = NULL;
+	/* now walk from the parent so we can get unopened fid */
+	fid = p9_client_walk(dfid, 1, &name, 0);
+	if (IS_ERR(fid)) {
+		err = PTR_ERR(fid);
+		fid = NULL;
 		goto error;
-	}
+	} else
+		dfid = NULL;
 
-	inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb);
+	/* instantiate inode and assign the unopened fid to the dentry */
+	inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
 	if (IS_ERR(inode)) {
 		err = PTR_ERR(inode);
-		inode = NULL;
 		goto error;
 	}
 
@@ -508,35 +436,78 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
 		dentry->d_op = &v9fs_cached_dentry_operations;
 	else
 		dentry->d_op = &v9fs_dentry_operations;
+
 	d_instantiate(dentry, inode);
+	v9fs_fid_add(dentry, fid);
+	return ofid;
 
-	if (nd && nd->flags & LOOKUP_OPEN) {
-		ffid = v9fs_fid_create(v9ses, fid);
-		if (!ffid)
-			return -ENOMEM;
+error:
+	if (dfid)
+		p9_client_clunk(dfid);
+
+	if (ofid)
+		p9_client_clunk(ofid);
+
+	if (fid)
+		p9_client_clunk(fid);
+
+	return ERR_PTR(err);
+}
+
+/**
+ * v9fs_vfs_create - VFS hook to create files
+ * @inode: directory inode that is being created
+ * @dentry:  dentry that is being deleted
+ * @mode: create permissions
+ * @nd: path information
+ *
+ */
 
+static int
+v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
+		struct nameidata *nd)
+{
+	int err;
+	u32 perm;
+	int flags;
+	struct v9fs_session_info *v9ses;
+	struct p9_fid *fid;
+	struct file *filp;
+
+	err = 0;
+	fid = NULL;
+	v9ses = v9fs_inode2v9ses(dir);
+	perm = unixmode2p9mode(v9ses, mode);
+	if (nd && nd->flags & LOOKUP_OPEN)
+		flags = nd->intent.open.flags - 1;
+	else
+		flags = O_RDWR;
+
+	fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
+						v9fs_uflags2omode(flags));
+	if (IS_ERR(fid)) {
+		err = PTR_ERR(fid);
+		fid = NULL;
+		goto error;
+	}
+
+	/* if we are opening a file, assign the open fid to the file */
+	if (nd && nd->flags & LOOKUP_OPEN) {
 		filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created);
 		if (IS_ERR(filp)) {
-			v9fs_fid_destroy(ffid);
-			return PTR_ERR(filp);
+			err = PTR_ERR(filp);
+			goto error;
 		}
 
-		ffid->rdir_pos = 0;
-		ffid->rdir_fcall = NULL;
-		ffid->fidopen = 1;
-		ffid->iounit = iounit;
-		ffid->filp = filp;
-		filp->private_data = ffid;
-	}
+		filp->private_data = fid;
+	} else
+		p9_client_clunk(fid);
 
 	return 0;
 
-clunk_dfid:
-	v9fs_fid_clunk(v9ses, dfid);
-
 error:
-	if (vfid)
-		v9fs_fid_destroy(vfid);
+	if (fid)
+		p9_client_clunk(fid);
 
 	return err;
 }
@@ -552,57 +523,23 @@ error:
 static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 {
 	int err;
-	u32 fid, perm;
+	u32 perm;
 	struct v9fs_session_info *v9ses;
-	struct v9fs_fid *dfid, *vfid;
-	struct inode *inode;
+	struct p9_fid *fid;
 
-	inode = NULL;
-	vfid = NULL;
+	P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
+	err = 0;
 	v9ses = v9fs_inode2v9ses(dir);
-	dfid = v9fs_fid_clone(dentry->d_parent);
-	if(IS_ERR(dfid)) {
-		err = PTR_ERR(dfid);
-		goto error;
-	}
-
 	perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
-
-	err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
-		perm, V9FS_OREAD, NULL, &fid, NULL, NULL);
-
-	if (err) {
-		dprintk(DEBUG_ERROR, "create error %d\n", err);
-		goto clean_up_dfid;
+	fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
+	if (IS_ERR(fid)) {
+		err = PTR_ERR(fid);
+		fid = NULL;
 	}
 
-	vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry);
-	if (IS_ERR(vfid)) {
-		err = PTR_ERR(vfid);
-		vfid = NULL;
-		goto clean_up_dfid;
-	}
+	if (fid)
+		p9_client_clunk(fid);
 
-	v9fs_fid_clunk(v9ses, dfid);
-	inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb);
-	if (IS_ERR(inode)) {
-		err = PTR_ERR(inode);
-		inode = NULL;
-		v9fs_fid_destroy(vfid);
-		goto error;
-	}
-
-	if(v9ses->cache)
-		dentry->d_op = &v9fs_cached_dentry_operations;
-	else
-		dentry->d_op = &v9fs_dentry_operations;
-	d_instantiate(dentry, inode);
-	return 0;
-
-clean_up_dfid:
-	v9fs_fid_clunk(v9ses, dfid);
-
-error:
 	return err;
 }
 
@@ -619,104 +556,54 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
 {
 	struct super_block *sb;
 	struct v9fs_session_info *v9ses;
-	struct v9fs_fid *dirfid;
-	struct v9fs_fid *fid;
+	struct p9_fid *dfid, *fid;
 	struct inode *inode;
-	struct v9fs_fcall *fcall = NULL;
-	int dirfidnum = -1;
-	int newfid = -1;
+	char *name;
 	int result = 0;
 
-	dprintk(DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
+	P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
 		dir, dentry->d_name.name, dentry, nameidata);
 
 	sb = dir->i_sb;
 	v9ses = v9fs_inode2v9ses(dir);
-	dirfid = v9fs_fid_lookup(dentry->d_parent);
-
-	if(IS_ERR(dirfid))
-		return ERR_PTR(PTR_ERR(dirfid));
-
-	dirfidnum = dirfid->fid;
-
-	newfid = v9fs_get_idpool(&v9ses->fidpool);
-	if (newfid < 0) {
-		eprintk(KERN_WARNING, "newfid fails!\n");
-		result = -ENOSPC;
-		goto Release_Dirfid;
-	}
-
-	result = v9fs_t_walk(v9ses, dirfidnum, newfid,
-		(char *)dentry->d_name.name, &fcall);
-
-	up(&dirfid->lock);
-
-	if (result < 0) {
-		if (fcall && fcall->id == RWALK)
-			v9fs_t_clunk(v9ses, newfid);
-		else
-			v9fs_put_idpool(newfid, &v9ses->fidpool);
-
+	dfid = v9fs_fid_lookup(dentry->d_parent);
+	if (IS_ERR(dfid))
+		return ERR_PTR(PTR_ERR(dfid));
+
+	name = (char *) dentry->d_name.name;
+	fid = p9_client_walk(dfid, 1, &name, 1);
+	if (IS_ERR(fid)) {
+		result = PTR_ERR(fid);
 		if (result == -ENOENT) {
 			d_add(dentry, NULL);
-			dprintk(DEBUG_VFS,
-				"Return negative dentry %p count %d\n",
-				dentry, atomic_read(&dentry->d_count));
-			kfree(fcall);
 			return NULL;
 		}
-		dprintk(DEBUG_ERROR, "walk error:%d\n", result);
-		goto FreeFcall;
-	}
-	kfree(fcall);
-
-	result = v9fs_t_stat(v9ses, newfid, &fcall);
-	if (result < 0) {
-		dprintk(DEBUG_ERROR, "stat error\n");
-		goto FreeFcall;
-	}
-
-	inode = v9fs_get_inode(sb, p9mode2unixmode(v9ses,
-		fcall->params.rstat.stat.mode));
 
-	if (IS_ERR(inode) && (PTR_ERR(inode) == -ENOSPC)) {
-		eprintk(KERN_WARNING, "inode alloc failes, returns %ld\n",
-			PTR_ERR(inode));
-
-		result = -ENOSPC;
-		goto FreeFcall;
+		return ERR_PTR(result);
 	}
 
-	inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat.qid);
-
-	fid = v9fs_fid_create(v9ses, newfid);
-	if (fid == NULL) {
-		dprintk(DEBUG_ERROR, "couldn't insert\n");
-		result = -ENOMEM;
-		goto FreeFcall;
+	inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
+	if (IS_ERR(inode)) {
+		result = PTR_ERR(inode);
+		inode = NULL;
+		goto error;
 	}
 
-	result = v9fs_fid_insert(fid, dentry);
+	result = v9fs_fid_add(dentry, fid);
 	if (result < 0)
-		goto FreeFcall;
+		goto error;
 
-	fid->qid = fcall->params.rstat.stat.qid;
-	v9fs_stat2inode(&fcall->params.rstat.stat, inode, inode->i_sb);
 	if((fid->qid.version)&&(v9ses->cache))
 		dentry->d_op = &v9fs_cached_dentry_operations;
 	else
 		dentry->d_op = &v9fs_dentry_operations;
 
 	d_add(dentry, inode);
-	kfree(fcall);
-
 	return NULL;
 
-Release_Dirfid:
-	up(&dirfid->lock);
-
-FreeFcall:
-	kfree(fcall);
+error:
+	if (fid)
+		p9_client_clunk(fid);
 
 	return ERR_PTR(result);
 }
@@ -758,73 +645,54 @@ static int
 v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 		struct inode *new_dir, struct dentry *new_dentry)
 {
-	struct inode *old_inode = old_dentry->d_inode;
-	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode);
-	struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry);
-	struct v9fs_fid *olddirfid;
-	struct v9fs_fid *newdirfid;
-	struct v9fs_wstat wstat;
-	struct v9fs_fcall *fcall = NULL;
-	int fid = -1;
-	int olddirfidnum = -1;
-	int newdirfidnum = -1;
-	int retval = 0;
-
-	dprintk(DEBUG_VFS, "\n");
+	struct inode *old_inode;
+	struct v9fs_session_info *v9ses;
+	struct p9_fid *oldfid;
+	struct p9_fid *olddirfid;
+	struct p9_fid *newdirfid;
+	struct p9_wstat wstat;
+	int retval;
 
+	P9_DPRINTK(P9_DEBUG_VFS, "\n");
+	retval = 0;
+	old_inode = old_dentry->d_inode;
+	v9ses = v9fs_inode2v9ses(old_inode);
+	oldfid = v9fs_fid_lookup(old_dentry);
 	if(IS_ERR(oldfid))
 		return PTR_ERR(oldfid);
 
 	olddirfid = v9fs_fid_clone(old_dentry->d_parent);
 	if(IS_ERR(olddirfid)) {
 		retval = PTR_ERR(olddirfid);
-		goto Release_lock;
+		goto done;
 	}
 
 	newdirfid = v9fs_fid_clone(new_dentry->d_parent);
 	if(IS_ERR(newdirfid)) {
 		retval = PTR_ERR(newdirfid);
-		goto Clunk_olddir;
+		goto clunk_olddir;
 	}
 
 	/* 9P can only handle file rename in the same directory */
 	if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {
-		dprintk(DEBUG_ERROR, "old dir and new dir are different\n");
+		P9_DPRINTK(P9_DEBUG_ERROR,
+				"old dir and new dir are different\n");
 		retval = -EXDEV;
-		goto Clunk_newdir;
-	}
-
-	fid = oldfid->fid;
-	olddirfidnum = olddirfid->fid;
-	newdirfidnum = newdirfid->fid;
-
-	if (fid < 0) {
-		dprintk(DEBUG_ERROR, "no fid for old file #%lu\n",
-			old_inode->i_ino);
-		retval = -EBADF;
-		goto Clunk_newdir;
+		goto clunk_newdir;
 	}
 
 	v9fs_blank_wstat(&wstat);
 	wstat.muid = v9ses->name;
 	wstat.name = (char *) new_dentry->d_name.name;
+	retval = p9_client_wstat(oldfid, &wstat);
 
-	retval = v9fs_t_wstat(v9ses, fid, &wstat, &fcall);
+clunk_newdir:
+	p9_client_clunk(olddirfid);
 
-	if (retval < 0)
-		PRINT_FCALL_ERROR("wstat error", fcall);
-
-	kfree(fcall);
-
-Clunk_newdir:
-	v9fs_fid_clunk(v9ses, newdirfid);
-
-Clunk_olddir:
-	v9fs_fid_clunk(v9ses, olddirfid);
-
-Release_lock:
-	up(&oldfid->lock);
+clunk_olddir:
+	p9_client_clunk(newdirfid);
 
+done:
 	return retval;
 }
 
@@ -840,28 +708,30 @@ static int
 v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
 		 struct kstat *stat)
 {
-	struct v9fs_fcall *fcall = NULL;
-	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
-	struct v9fs_fid *fid = v9fs_fid_clone(dentry);
-	int err = -EPERM;
+	int err;
+	struct v9fs_session_info *v9ses;
+	struct p9_fid *fid;
+	struct p9_stat *st;
 
-	dprintk(DEBUG_VFS, "dentry: %p\n", dentry);
-	if(IS_ERR(fid))
+	P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
+	err = -EPERM;
+	v9ses = v9fs_inode2v9ses(dentry->d_inode);
+	if (v9ses->cache == CACHE_LOOSE)
+		return simple_getattr(mnt, dentry, stat);
+
+	fid = v9fs_fid_lookup(dentry);
+	if (IS_ERR(fid))
 		return PTR_ERR(fid);
 
-	err = v9fs_t_stat(v9ses, fid->fid, &fcall);
+	st = p9_client_stat(fid);
+	if (IS_ERR(st))
+		return PTR_ERR(st);
 
-	if (err < 0)
-		dprintk(DEBUG_ERROR, "stat error\n");
-	else {
-		v9fs_stat2inode(&fcall->params.rstat.stat, dentry->d_inode,
-				  dentry->d_inode->i_sb);
+	v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
 		generic_fillattr(dentry->d_inode, stat);
-	}
 
-	kfree(fcall);
-	v9fs_fid_clunk(v9ses, fid);
-	return err;
+	kfree(st);
+	return 0;
 }
 
 /**
@@ -873,13 +743,15 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
 
 static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
 {
-	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
-	struct v9fs_fid *fid = v9fs_fid_clone(dentry);
-	struct v9fs_fcall *fcall = NULL;
-	struct v9fs_wstat wstat;
-	int res = -EPERM;
+	int retval;
+	struct v9fs_session_info *v9ses;
+	struct p9_fid *fid;
+	struct p9_wstat wstat;
 
-	dprintk(DEBUG_VFS, "\n");
+	P9_DPRINTK(P9_DEBUG_VFS, "\n");
+	retval = -EPERM;
+	v9ses = v9fs_inode2v9ses(dentry->d_inode);
+	fid = v9fs_fid_lookup(dentry);
 	if(IS_ERR(fid))
 		return PTR_ERR(fid);
 
@@ -904,17 +776,11 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
 			wstat.n_gid = iattr->ia_gid;
 	}
 
-	res = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall);
+	retval = p9_client_wstat(fid, &wstat);
+	if (retval >= 0)
+		retval = inode_setattr(dentry->d_inode, iattr);
 
-	if (res < 0)
-		PRINT_FCALL_ERROR("wstat error", fcall);
-
-	kfree(fcall);
-	if (res >= 0)
-		res = inode_setattr(dentry->d_inode, iattr);
-
-	v9fs_fid_clunk(v9ses, fid);
-	return res;
+	return retval;
 }
 
 /**
@@ -926,7 +792,7 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
  */
 
 void
-v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode,
+v9fs_stat2inode(struct p9_stat *stat, struct inode *inode,
 	struct super_block *sb)
 {
 	int n;
@@ -967,8 +833,9 @@ v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode,
 		case 'b':
 			break;
 		default:
-			dprintk(DEBUG_ERROR, "Unknown special type %c (%.*s)\n",
-				type, stat->extension.len, stat->extension.str);
+			P9_DPRINTK(P9_DEBUG_ERROR,
+				"Unknown special type %c (%.*s)\n", type,
+				stat->extension.len, stat->extension.str);
 		};
 		inode->i_rdev = MKDEV(major, minor);
 	} else
@@ -976,8 +843,8 @@ v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode,
 
 	inode->i_size = stat->length;
 
-	inode->i_blocks =
-	    (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
+	/* not real number of blocks, but 512 byte ones ... */
+	inode->i_blocks = (inode->i_size + 512 - 1) >> 9;
 }
 
 /**
@@ -987,7 +854,7 @@ v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode,
  * BUG: potential for inode number collisions?
  */
 
-ino_t v9fs_qid2ino(struct v9fs_qid *qid)
+ino_t v9fs_qid2ino(struct p9_qid *qid)
 {
 	u64 path = qid->path + 2;
 	ino_t i = 0;
@@ -1010,56 +877,46 @@ ino_t v9fs_qid2ino(struct v9fs_qid *qid)
 
 static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
 {
-	int retval = -EPERM;
+	int retval;
 
-	struct v9fs_fcall *fcall = NULL;
-	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
-	struct v9fs_fid *fid = v9fs_fid_clone(dentry);
+	struct v9fs_session_info *v9ses;
+	struct p9_fid *fid;
+	struct p9_stat *st;
 
+	P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
+	retval = -EPERM;
+	v9ses = v9fs_inode2v9ses(dentry->d_inode);
+	fid = v9fs_fid_lookup(dentry);
 	if(IS_ERR(fid))
 		return PTR_ERR(fid);
 
-	if (!v9ses->extended) {
-		retval = -EBADF;
-		dprintk(DEBUG_ERROR, "not extended\n");
-		goto ClunkFid;
-	}
-
-	dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name);
-	retval = v9fs_t_stat(v9ses, fid->fid, &fcall);
-
-	if (retval < 0) {
-		dprintk(DEBUG_ERROR, "stat error\n");
-		goto FreeFcall;
-	}
+	if (!v9ses->extended)
+		return -EBADF;
 
-	if (!fcall) {
-		retval = -EIO;
-		goto ClunkFid;
-	}
+	st = p9_client_stat(fid);
+	if (IS_ERR(st))
+		return PTR_ERR(st);
 
-	if (!(fcall->params.rstat.stat.mode & V9FS_DMSYMLINK)) {
+	if (!(st->mode & P9_DMSYMLINK)) {
 		retval = -EINVAL;
-		goto FreeFcall;
+		goto done;
 	}
 
 	/* copy extension buffer into buffer */
-	if (fcall->params.rstat.stat.extension.len < buflen)
-		buflen = fcall->params.rstat.stat.extension.len + 1;
+	if (st->extension.len < buflen)
+		buflen = st->extension.len + 1;
 
-	memmove(buffer, fcall->params.rstat.stat.extension.str, buflen - 1);
+	memmove(buffer, st->extension.str, buflen - 1);
 	buffer[buflen-1] = 0;
 
-	dprintk(DEBUG_ERROR, "%s -> %.*s (%s)\n", dentry->d_name.name, fcall->params.rstat.stat.extension.len,
-		fcall->params.rstat.stat.extension.str, buffer);
-	retval = buflen;
+	P9_DPRINTK(P9_DEBUG_VFS,
+		"%s -> %.*s (%s)\n", dentry->d_name.name, st->extension.len,
+		st->extension.str, buffer);
 
-FreeFcall:
-	kfree(fcall);
-
-ClunkFid:
-	v9fs_fid_clunk(v9ses, fid);
+	retval = buflen;
 
+done:
+	kfree(st);
 	return retval;
 }
 
@@ -1084,14 +941,14 @@ static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer,
 	if (buflen > PATH_MAX)
 		buflen = PATH_MAX;
 
-	dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+	P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
 
 	retval = v9fs_readlink(dentry, link, buflen);
 
 	if (retval > 0) {
 		if ((ret = copy_to_user(buffer, link, retval)) != 0) {
-			dprintk(DEBUG_ERROR, "problem copying to user: %d\n",
-				ret);
+			P9_DPRINTK(P9_DEBUG_ERROR,
+					"problem copying to user: %d\n", ret);
 			retval = ret;
 		}
 	}
@@ -1112,7 +969,7 @@ static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
 	int len = 0;
 	char *link = __getname();
 
-	dprintk(DEBUG_VFS, "%s n", dentry->d_name.name);
+	P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
 
 	if (!link)
 		link = ERR_PTR(-ENOMEM);
@@ -1141,7 +998,7 @@ static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void
 {
 	char *s = nd_get_link(nd);
 
-	dprintk(DEBUG_VFS, " %s %s\n", dentry->d_name.name, s);
+	P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, s);
 	if (!IS_ERR(s))
 		__putname(s);
 }
@@ -1149,66 +1006,24 @@ static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void
 static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
 	int mode, const char *extension)
 {
-	int err;
-	u32 fid, perm;
+	u32 perm;
 	struct v9fs_session_info *v9ses;
-	struct v9fs_fid *dfid, *vfid = NULL;
-	struct inode *inode = NULL;
+	struct p9_fid *fid;
 
 	v9ses = v9fs_inode2v9ses(dir);
 	if (!v9ses->extended) {
-		dprintk(DEBUG_ERROR, "not extended\n");
+		P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
 		return -EPERM;
 	}
 
-	dfid = v9fs_fid_clone(dentry->d_parent);
-	if(IS_ERR(dfid)) {
-		err = PTR_ERR(dfid);
-		goto error;
-	}
-
 	perm = unixmode2p9mode(v9ses, mode);
+	fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
+								P9_OREAD);
+	if (IS_ERR(fid))
+		return PTR_ERR(fid);
 
-	err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
-		perm, V9FS_OREAD, (char *) extension, &fid, NULL, NULL);
-
-	if (err)
-		goto clunk_dfid;
-
-	err = v9fs_t_clunk(v9ses, fid);
-	if (err)
-		goto clunk_dfid;
-
-	vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry);
-	if (IS_ERR(vfid)) {
-		err = PTR_ERR(vfid);
-		vfid = NULL;
-		goto clunk_dfid;
-	}
-
-	inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb);
-	if (IS_ERR(inode)) {
-		err = PTR_ERR(inode);
-		inode = NULL;
-		goto free_vfid;
-	}
-
-	if(v9ses->cache)
-		dentry->d_op = &v9fs_cached_dentry_operations;
-	else
-		dentry->d_op = &v9fs_dentry_operations;
-	d_instantiate(dentry, inode);
+	p9_client_clunk(fid);
 	return 0;
-
-free_vfid:
-	v9fs_fid_destroy(vfid);
-
-clunk_dfid:
-	v9fs_fid_clunk(v9ses, dfid);
-
-error:
-	return err;
-
 }
 
 /**
@@ -1224,8 +1039,8 @@ error:
 static int
 v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
 {
-	dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
-		symname);
+	P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino,
+					dentry->d_name.name, symname);
 
 	return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
 }
@@ -1247,11 +1062,11 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
 	      struct dentry *dentry)
 {
 	int retval;
-	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
-	struct v9fs_fid *oldfid;
+	struct p9_fid *oldfid;
 	char *name;
 
-	dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
+	P9_DPRINTK(P9_DEBUG_VFS,
+		" %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
 		old_dentry->d_name.name);
 
 	oldfid = v9fs_fid_clone(old_dentry);
@@ -1265,11 +1080,11 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
 	}
 
 	sprintf(name, "%d\n", oldfid->fid);
-	retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name);
+	retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
 	__putname(name);
 
 clunk_fid:
-	v9fs_fid_clunk(v9ses, oldfid);
+	p9_client_clunk(oldfid);
 	return retval;
 }
 
@@ -1288,7 +1103,8 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
 	int retval;
 	char *name;
 
-	dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
+	P9_DPRINTK(P9_DEBUG_VFS,
+		" %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
 		dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
 
 	if (!new_valid_dev(rdev))
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 7bdf8b3..ba90437 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -37,10 +37,10 @@
 #include <linux/mount.h>
 #include <linux/idr.h>
 #include <linux/sched.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
 
-#include "debug.h"
 #include "v9fs.h"
-#include "9p.h"
 #include "v9fs_vfs.h"
 #include "fid.h"
 
@@ -107,41 +107,48 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
 		       struct vfsmount *mnt)
 {
 	struct super_block *sb = NULL;
-	struct v9fs_fcall *fcall = NULL;
 	struct inode *inode = NULL;
 	struct dentry *root = NULL;
 	struct v9fs_session_info *v9ses = NULL;
-	struct v9fs_fid *root_fid = NULL;
+	struct p9_stat *st = NULL;
 	int mode = S_IRWXUGO | S_ISVTX;
 	uid_t uid = current->fsuid;
 	gid_t gid = current->fsgid;
-	int stat_result = 0;
-	int newfid = 0;
+	struct p9_fid *fid;
 	int retval = 0;
 
-	dprintk(DEBUG_VFS, " \n");
+	P9_DPRINTK(P9_DEBUG_VFS, " \n");
 
 	v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
 	if (!v9ses)
 		return -ENOMEM;
 
-	if ((newfid = v9fs_session_init(v9ses, dev_name, data)) < 0) {
-		dprintk(DEBUG_ERROR, "problem initiating session\n");
-		retval = newfid;
-		goto out_free_session;
+	fid = v9fs_session_init(v9ses, dev_name, data);
+	if (IS_ERR(fid)) {
+		retval = PTR_ERR(fid);
+		fid = NULL;
+		kfree(v9ses);
+		v9ses = NULL;
+		goto error;
+	}
+
+	st = p9_client_stat(fid);
+	if (IS_ERR(st)) {
+		retval = PTR_ERR(st);
+		goto error;
 	}
 
 	sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
 	if (IS_ERR(sb)) {
 		retval = PTR_ERR(sb);
-		goto out_close_session;
+		goto error;
 	}
 	v9fs_fill_super(sb, v9ses, flags);
 
 	inode = v9fs_get_inode(sb, S_IFDIR | mode);
 	if (IS_ERR(inode)) {
 		retval = PTR_ERR(inode);
-		goto put_back_sb;
+		goto error;
 	}
 
 	inode->i_uid = uid;
@@ -150,54 +157,30 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
 	root = d_alloc_root(inode);
 	if (!root) {
 		retval = -ENOMEM;
-		goto put_back_sb;
+		goto error;
 	}
 
 	sb->s_root = root;
+	root->d_inode->i_ino = v9fs_qid2ino(&st->qid);
+	v9fs_stat2inode(st, root->d_inode, sb);
+	v9fs_fid_add(root, fid);
 
-	stat_result = v9fs_t_stat(v9ses, newfid, &fcall);
-	if (stat_result < 0) {
-		dprintk(DEBUG_ERROR, "stat error\n");
-		v9fs_t_clunk(v9ses, newfid);
-	} else {
-		/* Setup the Root Inode */
-		root_fid = v9fs_fid_create(v9ses, newfid);
-		if (root_fid == NULL) {
-			retval = -ENOMEM;
-			goto put_back_sb;
-		}
-
-		retval = v9fs_fid_insert(root_fid, root);
-		if (retval < 0) {
-			kfree(fcall);
-			goto put_back_sb;
-		}
-
-		root_fid->qid = fcall->params.rstat.stat.qid;
-		root->d_inode->i_ino =
-		    v9fs_qid2ino(&fcall->params.rstat.stat.qid);
-		v9fs_stat2inode(&fcall->params.rstat.stat, root->d_inode, sb);
-	}
+	return simple_set_mnt(mnt, sb);
 
-	kfree(fcall);
+error:
+	if (fid)
+		p9_client_clunk(fid);
 
-	if (stat_result < 0) {
-		retval = stat_result;
-		goto put_back_sb;
+	if (v9ses) {
+		v9fs_session_close(v9ses);
+		kfree(v9ses);
 	}
 
-	return simple_set_mnt(mnt, sb);
-
-out_close_session:
-	v9fs_session_close(v9ses);
-out_free_session:
-	kfree(v9ses);
-	return retval;
+	if (sb) {
+		up_write(&sb->s_umount);
+		deactivate_super(sb);
+	}
 
-put_back_sb:
-	/* deactivate_super calls v9fs_kill_super which will frees the rest */
-	up_write(&sb->s_umount);
-	deactivate_super(sb);
 	return retval;
 }
 
@@ -211,7 +194,7 @@ static void v9fs_kill_super(struct super_block *s)
 {
 	struct v9fs_session_info *v9ses = s->s_fs_info;
 
-	dprintk(DEBUG_VFS, " %p\n", s);
+	P9_DPRINTK(P9_DEBUG_VFS, " %p\n", s);
 
 	v9fs_dentry_release(s->s_root);	/* clunk root */
 
@@ -219,7 +202,7 @@ static void v9fs_kill_super(struct super_block *s)
 
 	v9fs_session_close(v9ses);
 	kfree(v9ses);
-	dprintk(DEBUG_VFS, "exiting kill_super\n");
+	P9_DPRINTK(P9_DEBUG_VFS, "exiting kill_super\n");
 }
 
 /**
@@ -234,7 +217,7 @@ static int v9fs_show_options(struct seq_file *m, struct vfsmount *mnt)
 	struct v9fs_session_info *v9ses = mnt->mnt_sb->s_fs_info;
 
 	if (v9ses->debug != 0)
-		seq_printf(m, ",debug=%u", v9ses->debug);
+		seq_printf(m, ",debug=%x", v9ses->debug);
 	if (v9ses->port != V9FS_PORT)
 		seq_printf(m, ",port=%u", v9ses->port);
 	if (v9ses->maxdata != 9000)
diff --git a/fs/Kconfig b/fs/Kconfig
index 0fa0c11..6a64990 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -251,7 +251,7 @@ config JBD2
 
 config JBD2_DEBUG
 	bool "JBD2 (ext4dev/ext4) debugging support"
-	depends on JBD2
+	depends on JBD2 && DEBUG_FS
 	help
 	  If you are using the ext4dev/ext4 journaled file system (or
 	  potentially any other filesystem/device using JBD2), this option
@@ -260,10 +260,10 @@ config JBD2_DEBUG
 	  By default, the debugging output will be turned off.
 
 	  If you select Y here, then you will be able to turn on debugging
-	  with "echo N > /proc/sys/fs/jbd2-debug", where N is a number between
-	  1 and 5. The higher the number, the more debugging output is
-	  generated.  To turn debugging off again, do
-	  "echo 0 > /proc/sys/fs/jbd2-debug".
+	  with "echo N > /sys/kernel/debug/jbd2/jbd2-debug", where N is a
+	  number between 1 and 5. The higher the number, the more debugging
+	  output is generated.  To turn debugging off again, do
+	  "echo 0 > /sys/kernel/debug/jbd2/jbd2-debug".
 
 config FS_MBCACHE
 # Meta block cache for Extended Attributes (ext2/ext3/ext4)
@@ -991,7 +991,7 @@ config TMPFS_POSIX_ACL
 
 config HUGETLBFS
 	bool "HugeTLB file system support"
-	depends on X86 || IA64 || PPC64 || SPARC64 || SUPERH || BROKEN
+	depends on X86 || IA64 || PPC64 || SPARC64 || (SUPERH && MMU) || BROKEN
 	help
 	  hugetlbfs is a filesystem backing for HugeTLB pages, based on
 	  ramfs. For architectures that support it, say Y here and read
@@ -1675,6 +1675,7 @@ config NFSD_V3_ACL
 config NFSD_V4
 	bool "Provide NFSv4 server support (EXPERIMENTAL)"
 	depends on NFSD_V3 && EXPERIMENTAL
+	select RPCSEC_GSS_KRB5
 	help
 	  If you would like to include the NFSv4 server as well as the NFSv2
 	  and NFSv3 servers, say Y here.  This feature is experimental, and
@@ -2048,7 +2049,7 @@ config AFS_DEBUG
 
 config 9P_FS
 	tristate "Plan 9 Resource Sharing Support (9P2000) (Experimental)"
-	depends on INET && EXPERIMENTAL
+	depends on INET && NET_9P && EXPERIMENTAL
 	help
 	  If you say Y here, you will get experimental support for
 	  Plan 9 resource sharing via the 9P2000 protocol.
diff --git a/fs/adfs/file.c b/fs/adfs/file.c
index f544a28..36e381c 100644
--- a/fs/adfs/file.c
+++ b/fs/adfs/file.c
@@ -33,7 +33,7 @@ const struct file_operations adfs_file_operations = {
 	.fsync		= file_fsync,
 	.write		= do_sync_write,
 	.aio_write	= generic_file_aio_write,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 };
 
 const struct inode_operations adfs_file_inode_operations = {
diff --git a/fs/affs/file.c b/fs/affs/file.c
index c879690..c314a35 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -35,7 +35,7 @@ const struct file_operations affs_file_operations = {
 	.open		= affs_file_open,
 	.release	= affs_file_release,
 	.fsync		= file_fsync,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 };
 
 const struct inode_operations affs_file_inode_operations = {
diff --git a/fs/afs/Makefile b/fs/afs/Makefile
index 73ce561..a666710 100644
--- a/fs/afs/Makefile
+++ b/fs/afs/Makefile
@@ -8,6 +8,7 @@ kafs-objs := \
 	cmservice.o \
 	dir.o \
 	file.o \
+	flock.o \
 	fsclient.o \
 	inode.o \
 	main.o \
diff --git a/fs/afs/afs.h b/fs/afs/afs.h
index 2452579..c548aa3 100644
--- a/fs/afs/afs.h
+++ b/fs/afs/afs.h
@@ -37,6 +37,13 @@ typedef enum {
 	AFS_FTYPE_SYMLINK	= 3,
 } afs_file_type_t;
 
+typedef enum {
+	AFS_LOCK_READ		= 0,	/* read lock request */
+	AFS_LOCK_WRITE		= 1,	/* write lock request */
+} afs_lock_type_t;
+
+#define AFS_LOCKWAIT		(5 * 60) /* time until a lock times out (seconds) */
+
 /*
  * AFS file identifier
  */
@@ -120,6 +127,7 @@ struct afs_file_status {
 	struct afs_fid		parent;		/* parent dir ID for non-dirs only */
 	time_t			mtime_client;	/* last time client changed data */
 	time_t			mtime_server;	/* last time server changed data */
+	s32			lock_count;	/* file lock count (0=UNLK -1=WRLCK +ve=#RDLCK */
 };
 
 /*
diff --git a/fs/afs/afs_fs.h b/fs/afs/afs_fs.h
index a18c374..eb64732 100644
--- a/fs/afs/afs_fs.h
+++ b/fs/afs/afs_fs.h
@@ -31,6 +31,9 @@ enum AFS_FS_Operations {
 	FSGETVOLUMEINFO		= 148,	/* AFS Get information about a volume */
 	FSGETVOLUMESTATUS	= 149,	/* AFS Get volume status information */
 	FSGETROOTVOLUME		= 151,	/* AFS Get root volume name */
+	FSSETLOCK		= 156,	/* AFS Request a file lock */
+	FSEXTENDLOCK		= 157,	/* AFS Extend a file lock */
+	FSRELEASELOCK		= 158,	/* AFS Release a file lock */
 	FSLOOKUP		= 161,	/* AFS lookup file in directory */
 	FSFETCHDATA64		= 65537, /* AFS Fetch file data */
 	FSSTOREDATA64		= 65538, /* AFS Store file data */
diff --git a/fs/afs/callback.c b/fs/afs/callback.c
index bacf518..b824394 100644
--- a/fs/afs/callback.c
+++ b/fs/afs/callback.c
@@ -125,6 +125,9 @@ static void afs_break_callback(struct afs_server *server,
 		spin_unlock(&server->cb_lock);
 
 		queue_work(afs_callback_update_worker, &vnode->cb_broken_work);
+		if (list_empty(&vnode->granted_locks) &&
+		    !list_empty(&vnode->pending_locks))
+			afs_lock_may_be_available(vnode);
 		spin_unlock(&vnode->lock);
 	}
 }
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 546c595..33fe39a 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -44,6 +44,7 @@ const struct file_operations afs_dir_file_operations = {
 	.open		= afs_dir_open,
 	.release	= afs_release,
 	.readdir	= afs_readdir,
+	.lock		= afs_lock,
 };
 
 const struct inode_operations afs_dir_inode_operations = {
diff --git a/fs/afs/file.c b/fs/afs/file.c
index 9c0e721..525f7c5 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -32,8 +32,10 @@ const struct file_operations afs_file_operations = {
 	.aio_read	= generic_file_aio_read,
 	.aio_write	= afs_file_write,
 	.mmap		= generic_file_readonly_mmap,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 	.fsync		= afs_fsync,
+	.lock		= afs_lock,
+	.flock		= afs_flock,
 };
 
 const struct inode_operations afs_file_inode_operations = {
diff --git a/fs/afs/flock.c b/fs/afs/flock.c
new file mode 100644
index 0000000..8f07f8d1
--- /dev/null
+++ b/fs/afs/flock.c
@@ -0,0 +1,558 @@
+/* AFS file locking support
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/smp_lock.h>
+#include "internal.h"
+
+#define AFS_LOCK_GRANTED	0
+#define AFS_LOCK_PENDING	1
+
+static void afs_fl_copy_lock(struct file_lock *new, struct file_lock *fl);
+static void afs_fl_release_private(struct file_lock *fl);
+
+static struct workqueue_struct *afs_lock_manager;
+
+static struct file_lock_operations afs_lock_ops = {
+	.fl_copy_lock		= afs_fl_copy_lock,
+	.fl_release_private	= afs_fl_release_private,
+};
+
+/*
+ * initialise the lock manager thread if it isn't already running
+ */
+static int afs_init_lock_manager(void)
+{
+	if (!afs_lock_manager) {
+		afs_lock_manager = create_singlethread_workqueue("kafs_lockd");
+		if (!afs_lock_manager)
+			return -ENOMEM;
+	}
+	return 0;
+}
+
+/*
+ * destroy the lock manager thread if it's running
+ */
+void __exit afs_kill_lock_manager(void)
+{
+	if (afs_lock_manager)
+		destroy_workqueue(afs_lock_manager);
+}
+
+/*
+ * if the callback is broken on this vnode, then the lock may now be available
+ */
+void afs_lock_may_be_available(struct afs_vnode *vnode)
+{
+	_enter("{%x:%u}", vnode->fid.vid, vnode->fid.vnode);
+
+	queue_delayed_work(afs_lock_manager, &vnode->lock_work, 0);
+}
+
+/*
+ * the lock will time out in 5 minutes unless we extend it, so schedule
+ * extension in a bit less than that time
+ */
+static void afs_schedule_lock_extension(struct afs_vnode *vnode)
+{
+	queue_delayed_work(afs_lock_manager, &vnode->lock_work,
+			   AFS_LOCKWAIT * HZ / 2);
+}
+
+/*
+ * do work for a lock, including:
+ * - probing for a lock we're waiting on but didn't get immediately
+ * - extending a lock that's close to timing out
+ */
+void afs_lock_work(struct work_struct *work)
+{
+	struct afs_vnode *vnode =
+		container_of(work, struct afs_vnode, lock_work.work);
+	struct file_lock *fl;
+	afs_lock_type_t type;
+	struct key *key;
+	int ret;
+
+	_enter("{%x:%u}", vnode->fid.vid, vnode->fid.vnode);
+
+	spin_lock(&vnode->lock);
+
+	if (test_bit(AFS_VNODE_UNLOCKING, &vnode->flags)) {
+		_debug("unlock");
+		spin_unlock(&vnode->lock);
+
+		/* attempt to release the server lock; if it fails, we just
+		 * wait 5 minutes and it'll time out anyway */
+		ret = afs_vnode_release_lock(vnode, vnode->unlock_key);
+		if (ret < 0)
+			printk(KERN_WARNING "AFS:"
+			       " Failed to release lock on {%x:%x} error %d\n",
+			       vnode->fid.vid, vnode->fid.vnode, ret);
+
+		spin_lock(&vnode->lock);
+		key_put(vnode->unlock_key);
+		vnode->unlock_key = NULL;
+		clear_bit(AFS_VNODE_UNLOCKING, &vnode->flags);
+	}
+
+	/* if we've got a lock, then it must be time to extend that lock as AFS
+	 * locks time out after 5 minutes */
+	if (!list_empty(&vnode->granted_locks)) {
+		_debug("extend");
+
+		if (test_and_set_bit(AFS_VNODE_LOCKING, &vnode->flags))
+			BUG();
+		fl = list_entry(vnode->granted_locks.next,
+				struct file_lock, fl_u.afs.link);
+		key = key_get(fl->fl_file->private_data);
+		spin_unlock(&vnode->lock);
+
+		ret = afs_vnode_extend_lock(vnode, key);
+		clear_bit(AFS_VNODE_LOCKING, &vnode->flags);
+		key_put(key);
+		switch (ret) {
+		case 0:
+			afs_schedule_lock_extension(vnode);
+			break;
+		default:
+			/* ummm... we failed to extend the lock - retry
+			 * extension shortly */
+			printk(KERN_WARNING "AFS:"
+			       " Failed to extend lock on {%x:%x} error %d\n",
+			       vnode->fid.vid, vnode->fid.vnode, ret);
+			queue_delayed_work(afs_lock_manager, &vnode->lock_work,
+					   HZ * 10);
+			break;
+		}
+		_leave(" [extend]");
+		return;
+	}
+
+	/* if we don't have a granted lock, then we must've been called back by
+	 * the server, and so if might be possible to get a lock we're
+	 * currently waiting for */
+	if (!list_empty(&vnode->pending_locks)) {
+		_debug("get");
+
+		if (test_and_set_bit(AFS_VNODE_LOCKING, &vnode->flags))
+			BUG();
+		fl = list_entry(vnode->pending_locks.next,
+				struct file_lock, fl_u.afs.link);
+		key = key_get(fl->fl_file->private_data);
+		type = (fl->fl_type == F_RDLCK) ?
+			AFS_LOCK_READ : AFS_LOCK_WRITE;
+		spin_unlock(&vnode->lock);
+
+		ret = afs_vnode_set_lock(vnode, key, type);
+		clear_bit(AFS_VNODE_LOCKING, &vnode->flags);
+		switch (ret) {
+		case -EWOULDBLOCK:
+			_debug("blocked");
+			break;
+		case 0:
+			_debug("acquired");
+			if (type == AFS_LOCK_READ)
+				set_bit(AFS_VNODE_READLOCKED, &vnode->flags);
+			else
+				set_bit(AFS_VNODE_WRITELOCKED, &vnode->flags);
+			ret = AFS_LOCK_GRANTED;
+		default:
+			spin_lock(&vnode->lock);
+			/* the pending lock may have been withdrawn due to a
+			 * signal */
+			if (list_entry(vnode->pending_locks.next,
+				       struct file_lock, fl_u.afs.link) == fl) {
+				fl->fl_u.afs.state = ret;
+				if (ret == AFS_LOCK_GRANTED)
+					list_move_tail(&fl->fl_u.afs.link,
+						       &vnode->granted_locks);
+				else
+					list_del_init(&fl->fl_u.afs.link);
+				wake_up(&fl->fl_wait);
+				spin_unlock(&vnode->lock);
+			} else {
+				_debug("withdrawn");
+				clear_bit(AFS_VNODE_READLOCKED, &vnode->flags);
+				clear_bit(AFS_VNODE_WRITELOCKED, &vnode->flags);
+				spin_unlock(&vnode->lock);
+				afs_vnode_release_lock(vnode, key);
+				if (!list_empty(&vnode->pending_locks))
+					afs_lock_may_be_available(vnode);
+			}
+			break;
+		}
+		key_put(key);
+		_leave(" [pend]");
+		return;
+	}
+
+	/* looks like the lock request was withdrawn on a signal */
+	spin_unlock(&vnode->lock);
+	_leave(" [no locks]");
+}
+
+/*
+ * pass responsibility for the unlocking of a vnode on the server to the
+ * manager thread, lest a pending signal in the calling thread interrupt
+ * AF_RXRPC
+ * - the caller must hold the vnode lock
+ */
+static void afs_defer_unlock(struct afs_vnode *vnode, struct key *key)
+{
+	cancel_delayed_work(&vnode->lock_work);
+	if (!test_and_clear_bit(AFS_VNODE_READLOCKED, &vnode->flags) &&
+	    !test_and_clear_bit(AFS_VNODE_WRITELOCKED, &vnode->flags))
+		BUG();
+	if (test_and_set_bit(AFS_VNODE_UNLOCKING, &vnode->flags))
+		BUG();
+	vnode->unlock_key = key_get(key);
+	afs_lock_may_be_available(vnode);
+}
+
+/*
+ * request a lock on a file on the server
+ */
+static int afs_do_setlk(struct file *file, struct file_lock *fl)
+{
+	struct afs_vnode *vnode = AFS_FS_I(file->f_mapping->host);
+	afs_lock_type_t type;
+	struct key *key = file->private_data;
+	int ret;
+
+	_enter("{%x:%u},%u", vnode->fid.vid, vnode->fid.vnode, fl->fl_type);
+
+	/* only whole-file locks are supported */
+	if (fl->fl_start != 0 || fl->fl_end != OFFSET_MAX)
+		return -EINVAL;
+
+	ret = afs_init_lock_manager();
+	if (ret < 0)
+		return ret;
+
+	fl->fl_ops = &afs_lock_ops;
+	INIT_LIST_HEAD(&fl->fl_u.afs.link);
+	fl->fl_u.afs.state = AFS_LOCK_PENDING;
+
+	type = (fl->fl_type == F_RDLCK) ? AFS_LOCK_READ : AFS_LOCK_WRITE;
+
+	lock_kernel();
+
+	/* make sure we've got a callback on this file and that our view of the
+	 * data version is up to date */
+	ret = afs_vnode_fetch_status(vnode, NULL, key);
+	if (ret < 0)
+		goto error;
+
+	if (vnode->status.lock_count != 0 && !(fl->fl_flags & FL_SLEEP)) {
+		ret = -EAGAIN;
+		goto error;
+	}
+
+	spin_lock(&vnode->lock);
+
+	if (list_empty(&vnode->pending_locks)) {
+		/* if there's no-one else with a lock on this vnode, then we
+		 * need to ask the server for a lock */
+		if (list_empty(&vnode->granted_locks)) {
+			_debug("not locked");
+			ASSERTCMP(vnode->flags &
+				  ((1 << AFS_VNODE_LOCKING) |
+				   (1 << AFS_VNODE_READLOCKED) |
+				   (1 << AFS_VNODE_WRITELOCKED)), ==, 0);
+			list_add_tail(&fl->fl_u.afs.link, &vnode->pending_locks);
+			set_bit(AFS_VNODE_LOCKING, &vnode->flags);
+			spin_unlock(&vnode->lock);
+
+			ret = afs_vnode_set_lock(vnode, key, type);
+			clear_bit(AFS_VNODE_LOCKING, &vnode->flags);
+			switch (ret) {
+			case 0:
+				goto acquired_server_lock;
+			case -EWOULDBLOCK:
+				spin_lock(&vnode->lock);
+				ASSERT(list_empty(&vnode->granted_locks));
+				ASSERTCMP(vnode->pending_locks.next, ==,
+					  &fl->fl_u.afs.link);
+				goto wait;
+			default:
+				spin_lock(&vnode->lock);
+				list_del_init(&fl->fl_u.afs.link);
+				spin_unlock(&vnode->lock);
+				goto error;
+			}
+		}
+
+		/* if we've already got a readlock on the server and no waiting
+		 * writelocks, then we might be able to instantly grant another
+		 * readlock */
+		if (type == AFS_LOCK_READ &&
+		    vnode->flags & (1 << AFS_VNODE_READLOCKED)) {
+			_debug("instant readlock");
+			ASSERTCMP(vnode->flags &
+				  ((1 << AFS_VNODE_LOCKING) |
+				   (1 << AFS_VNODE_WRITELOCKED)), ==, 0);
+			ASSERT(!list_empty(&vnode->granted_locks));
+			goto sharing_existing_lock;
+		}
+	}
+
+	/* otherwise, we need to wait for a local lock to become available */
+	_debug("wait local");
+	list_add_tail(&fl->fl_u.afs.link, &vnode->pending_locks);
+wait:
+	if (!(fl->fl_flags & FL_SLEEP)) {
+		_debug("noblock");
+		ret = -EAGAIN;
+		goto abort_attempt;
+	}
+	spin_unlock(&vnode->lock);
+
+	/* now we need to sleep and wait for the lock manager thread to get the
+	 * lock from the server */
+	_debug("sleep");
+	ret = wait_event_interruptible(fl->fl_wait,
+				       fl->fl_u.afs.state <= AFS_LOCK_GRANTED);
+	if (fl->fl_u.afs.state <= AFS_LOCK_GRANTED) {
+		ret = fl->fl_u.afs.state;
+		if (ret < 0)
+			goto error;
+		spin_lock(&vnode->lock);
+		goto given_lock;
+	}
+
+	/* we were interrupted, but someone may still be in the throes of
+	 * giving us the lock */
+	_debug("intr");
+	ASSERTCMP(ret, ==, -ERESTARTSYS);
+
+	spin_lock(&vnode->lock);
+	if (fl->fl_u.afs.state <= AFS_LOCK_GRANTED) {
+		ret = fl->fl_u.afs.state;
+		if (ret < 0) {
+			spin_unlock(&vnode->lock);
+			goto error;
+		}
+		goto given_lock;
+	}
+
+abort_attempt:
+	/* we aren't going to get the lock, either because we're unwilling to
+	 * wait, or because some signal happened */
+	_debug("abort");
+	if (list_empty(&vnode->granted_locks) &&
+	    vnode->pending_locks.next == &fl->fl_u.afs.link) {
+		if (vnode->pending_locks.prev != &fl->fl_u.afs.link) {
+			/* kick the next pending lock into having a go */
+			list_del_init(&fl->fl_u.afs.link);
+			afs_lock_may_be_available(vnode);
+		}
+	} else {
+		list_del_init(&fl->fl_u.afs.link);
+	}
+	spin_unlock(&vnode->lock);
+	goto error;
+
+acquired_server_lock:
+	/* we've acquired a server lock, but it needs to be renewed after 5
+	 * mins */
+	spin_lock(&vnode->lock);
+	afs_schedule_lock_extension(vnode);
+	if (type == AFS_LOCK_READ)
+		set_bit(AFS_VNODE_READLOCKED, &vnode->flags);
+	else
+		set_bit(AFS_VNODE_WRITELOCKED, &vnode->flags);
+sharing_existing_lock:
+	/* the lock has been granted as far as we're concerned... */
+	fl->fl_u.afs.state = AFS_LOCK_GRANTED;
+	list_move_tail(&fl->fl_u.afs.link, &vnode->granted_locks);
+given_lock:
+	/* ... but we do still need to get the VFS's blessing */
+	ASSERT(!(vnode->flags & (1 << AFS_VNODE_LOCKING)));
+	ASSERT((vnode->flags & ((1 << AFS_VNODE_READLOCKED) |
+				(1 << AFS_VNODE_WRITELOCKED))) != 0);
+	ret = posix_lock_file(file, fl, NULL);
+	if (ret < 0)
+		goto vfs_rejected_lock;
+	spin_unlock(&vnode->lock);
+
+	/* again, make sure we've got a callback on this file and, again, make
+	 * sure that our view of the data version is up to date (we ignore
+	 * errors incurred here and deal with the consequences elsewhere) */
+	afs_vnode_fetch_status(vnode, NULL, key);
+
+error:
+	unlock_kernel();
+	_leave(" = %d", ret);
+	return ret;
+
+vfs_rejected_lock:
+	/* the VFS rejected the lock we just obtained, so we have to discard
+	 * what we just got */
+	_debug("vfs refused %d", ret);
+	list_del_init(&fl->fl_u.afs.link);
+	if (list_empty(&vnode->granted_locks))
+		afs_defer_unlock(vnode, key);
+	spin_unlock(&vnode->lock);
+	goto abort_attempt;
+}
+
+/*
+ * unlock on a file on the server
+ */
+static int afs_do_unlk(struct file *file, struct file_lock *fl)
+{
+	struct afs_vnode *vnode = AFS_FS_I(file->f_mapping->host);
+	struct key *key = file->private_data;
+	int ret;
+
+	_enter("{%x:%u},%u", vnode->fid.vid, vnode->fid.vnode, fl->fl_type);
+
+	/* only whole-file unlocks are supported */
+	if (fl->fl_start != 0 || fl->fl_end != OFFSET_MAX)
+		return -EINVAL;
+
+	fl->fl_ops = &afs_lock_ops;
+	INIT_LIST_HEAD(&fl->fl_u.afs.link);
+	fl->fl_u.afs.state = AFS_LOCK_PENDING;
+
+	spin_lock(&vnode->lock);
+	ret = posix_lock_file(file, fl, NULL);
+	if (ret < 0) {
+		spin_unlock(&vnode->lock);
+		_leave(" = %d [vfs]", ret);
+		return ret;
+	}
+
+	/* discard the server lock only if all granted locks are gone */
+	if (list_empty(&vnode->granted_locks))
+		afs_defer_unlock(vnode, key);
+	spin_unlock(&vnode->lock);
+	_leave(" = 0");
+	return 0;
+}
+
+/*
+ * return information about a lock we currently hold, if indeed we hold one
+ */
+static int afs_do_getlk(struct file *file, struct file_lock *fl)
+{
+	struct afs_vnode *vnode = AFS_FS_I(file->f_mapping->host);
+	struct key *key = file->private_data;
+	int ret, lock_count;
+
+	_enter("");
+
+	fl->fl_type = F_UNLCK;
+
+	mutex_lock(&vnode->vfs_inode.i_mutex);
+
+	/* check local lock records first */
+	ret = 0;
+	if (posix_test_lock(file, fl) == 0) {
+		/* no local locks; consult the server */
+		ret = afs_vnode_fetch_status(vnode, NULL, key);
+		if (ret < 0)
+			goto error;
+		lock_count = vnode->status.lock_count;
+		if (lock_count) {
+			if (lock_count > 0)
+				fl->fl_type = F_RDLCK;
+			else
+				fl->fl_type = F_WRLCK;
+			fl->fl_start = 0;
+			fl->fl_end = OFFSET_MAX;
+		}
+	}
+
+error:
+	mutex_unlock(&vnode->vfs_inode.i_mutex);
+	_leave(" = %d [%hd]", ret, fl->fl_type);
+	return ret;
+}
+
+/*
+ * manage POSIX locks on a file
+ */
+int afs_lock(struct file *file, int cmd, struct file_lock *fl)
+{
+	struct afs_vnode *vnode = AFS_FS_I(file->f_dentry->d_inode);
+
+	_enter("{%x:%u},%d,{t=%x,fl=%x,r=%Ld:%Ld}",
+	       vnode->fid.vid, vnode->fid.vnode, cmd,
+	       fl->fl_type, fl->fl_flags,
+	       (long long) fl->fl_start, (long long) fl->fl_end);
+
+	/* AFS doesn't support mandatory locks */
+	if ((vnode->vfs_inode.i_mode & (S_ISGID | S_IXGRP)) == S_ISGID &&
+	    fl->fl_type != F_UNLCK)
+		return -ENOLCK;
+
+	if (IS_GETLK(cmd))
+		return afs_do_getlk(file, fl);
+	if (fl->fl_type == F_UNLCK)
+		return afs_do_unlk(file, fl);
+	return afs_do_setlk(file, fl);
+}
+
+/*
+ * manage FLOCK locks on a file
+ */
+int afs_flock(struct file *file, int cmd, struct file_lock *fl)
+{
+	struct afs_vnode *vnode = AFS_FS_I(file->f_dentry->d_inode);
+
+	_enter("{%x:%u},%d,{t=%x,fl=%x}",
+	       vnode->fid.vid, vnode->fid.vnode, cmd,
+	       fl->fl_type, fl->fl_flags);
+
+	/*
+	 * No BSD flocks over NFS allowed.
+	 * Note: we could try to fake a POSIX lock request here by
+	 * using ((u32) filp | 0x80000000) or some such as the pid.
+	 * Not sure whether that would be unique, though, or whether
+	 * that would break in other places.
+	 */
+	if (!(fl->fl_flags & FL_FLOCK))
+		return -ENOLCK;
+
+	/* we're simulating flock() locks using posix locks on the server */
+	fl->fl_owner = (fl_owner_t) file;
+	fl->fl_start = 0;
+	fl->fl_end = OFFSET_MAX;
+
+	if (fl->fl_type == F_UNLCK)
+		return afs_do_unlk(file, fl);
+	return afs_do_setlk(file, fl);
+}
+
+/*
+ * the POSIX lock management core VFS code copies the lock record and adds the
+ * copy into its own list, so we need to add that copy to the vnode's lock
+ * queue in the same place as the original (which will be deleted shortly
+ * after)
+ */
+static void afs_fl_copy_lock(struct file_lock *new, struct file_lock *fl)
+{
+	_enter("");
+
+	list_add(&new->fl_u.afs.link, &fl->fl_u.afs.link);
+}
+
+/*
+ * need to remove this lock from the vnode queue when it's removed from the
+ * VFS's list
+ */
+static void afs_fl_release_private(struct file_lock *fl)
+{
+	_enter("");
+
+	list_del_init(&fl->fl_u.afs.link);
+}
diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index 5dff130..023b95b 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -67,7 +67,7 @@ static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
 	EXTRACT(status->group);
 	bp++; /* sync counter */
 	data_version |= (u64) ntohl(*bp++) << 32;
-	bp++; /* lock count */
+	EXTRACT(status->lock_count);
 	size |= (u64) ntohl(*bp++) << 32;
 	bp++; /* spare 4 */
 	*_bp = bp;
@@ -1748,3 +1748,156 @@ int afs_fs_get_volume_status(struct afs_server *server,
 
 	return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
 }
+
+/*
+ * deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
+ */
+static int afs_deliver_fs_xxxx_lock(struct afs_call *call,
+				    struct sk_buff *skb, bool last)
+{
+	const __be32 *bp;
+
+	_enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
+
+	afs_transfer_reply(call, skb);
+	if (!last)
+		return 0;
+
+	if (call->reply_size != call->reply_max)
+		return -EBADMSG;
+
+	/* unmarshall the reply once we've received all of it */
+	bp = call->buffer;
+	/* xdr_decode_AFSVolSync(&bp, call->replyX); */
+
+	_leave(" = 0 [done]");
+	return 0;
+}
+
+/*
+ * FS.SetLock operation type
+ */
+static const struct afs_call_type afs_RXFSSetLock = {
+	.name		= "FS.SetLock",
+	.deliver	= afs_deliver_fs_xxxx_lock,
+	.abort_to_error	= afs_abort_to_error,
+	.destructor	= afs_flat_call_destructor,
+};
+
+/*
+ * FS.ExtendLock operation type
+ */
+static const struct afs_call_type afs_RXFSExtendLock = {
+	.name		= "FS.ExtendLock",
+	.deliver	= afs_deliver_fs_xxxx_lock,
+	.abort_to_error	= afs_abort_to_error,
+	.destructor	= afs_flat_call_destructor,
+};
+
+/*
+ * FS.ReleaseLock operation type
+ */
+static const struct afs_call_type afs_RXFSReleaseLock = {
+	.name		= "FS.ReleaseLock",
+	.deliver	= afs_deliver_fs_xxxx_lock,
+	.abort_to_error	= afs_abort_to_error,
+	.destructor	= afs_flat_call_destructor,
+};
+
+/*
+ * get a lock on a file
+ */
+int afs_fs_set_lock(struct afs_server *server,
+		    struct key *key,
+		    struct afs_vnode *vnode,
+		    afs_lock_type_t type,
+		    const struct afs_wait_mode *wait_mode)
+{
+	struct afs_call *call;
+	__be32 *bp;
+
+	_enter("");
+
+	call = afs_alloc_flat_call(&afs_RXFSSetLock, 5 * 4, 6 * 4);
+	if (!call)
+		return -ENOMEM;
+
+	call->key = key;
+	call->reply = vnode;
+	call->service_id = FS_SERVICE;
+	call->port = htons(AFS_FS_PORT);
+
+	/* marshall the parameters */
+	bp = call->request;
+	*bp++ = htonl(FSSETLOCK);
+	*bp++ = htonl(vnode->fid.vid);
+	*bp++ = htonl(vnode->fid.vnode);
+	*bp++ = htonl(vnode->fid.unique);
+	*bp++ = htonl(type);
+
+	return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
+
+/*
+ * extend a lock on a file
+ */
+int afs_fs_extend_lock(struct afs_server *server,
+		       struct key *key,
+		       struct afs_vnode *vnode,
+		       const struct afs_wait_mode *wait_mode)
+{
+	struct afs_call *call;
+	__be32 *bp;
+
+	_enter("");
+
+	call = afs_alloc_flat_call(&afs_RXFSExtendLock, 4 * 4, 6 * 4);
+	if (!call)
+		return -ENOMEM;
+
+	call->key = key;
+	call->reply = vnode;
+	call->service_id = FS_SERVICE;
+	call->port = htons(AFS_FS_PORT);
+
+	/* marshall the parameters */
+	bp = call->request;
+	*bp++ = htonl(FSEXTENDLOCK);
+	*bp++ = htonl(vnode->fid.vid);
+	*bp++ = htonl(vnode->fid.vnode);
+	*bp++ = htonl(vnode->fid.unique);
+
+	return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
+
+/*
+ * release a lock on a file
+ */
+int afs_fs_release_lock(struct afs_server *server,
+			struct key *key,
+			struct afs_vnode *vnode,
+			const struct afs_wait_mode *wait_mode)
+{
+	struct afs_call *call;
+	__be32 *bp;
+
+	_enter("");
+
+	call = afs_alloc_flat_call(&afs_RXFSReleaseLock, 4 * 4, 6 * 4);
+	if (!call)
+		return -ENOMEM;
+
+	call->key = key;
+	call->reply = vnode;
+	call->service_id = FS_SERVICE;
+	call->port = htons(AFS_FS_PORT);
+
+	/* marshall the parameters */
+	bp = call->request;
+	*bp++ = htonl(FSRELEASELOCK);
+	*bp++ = htonl(vnode->fid.vid);
+	*bp++ = htonl(vnode->fid.vnode);
+	*bp++ = htonl(vnode->fid.unique);
+
+	return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 2c55dd9..6306438 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -351,10 +351,18 @@ struct afs_vnode {
 #define AFS_VNODE_ZAP_DATA	3		/* set if vnode's data should be invalidated */
 #define AFS_VNODE_DELETED	4		/* set if vnode deleted on server */
 #define AFS_VNODE_MOUNTPOINT	5		/* set if vnode is a mountpoint symlink */
+#define AFS_VNODE_LOCKING	6		/* set if waiting for lock on vnode */
+#define AFS_VNODE_READLOCKED	7		/* set if vnode is read-locked on the server */
+#define AFS_VNODE_WRITELOCKED	8		/* set if vnode is write-locked on the server */
+#define AFS_VNODE_UNLOCKING	9		/* set if vnode is being unlocked on the server */
 
 	long			acl_order;	/* ACL check count (callback break count) */
 
 	struct list_head	writebacks;	/* alterations in pagecache that need writing */
+	struct list_head	pending_locks;	/* locks waiting to be granted */
+	struct list_head	granted_locks;	/* locks granted on this file */
+	struct delayed_work	lock_work;	/* work to be done in locking */
+	struct key		*unlock_key;	/* key to be used in unlocking */
 
 	/* outstanding callback notification on this file */
 	struct rb_node		server_rb;	/* link in server->fs_vnodes */
@@ -474,6 +482,15 @@ extern int afs_open(struct inode *, struct file *);
 extern int afs_release(struct inode *, struct file *);
 
 /*
+ * flock.c
+ */
+extern void __exit afs_kill_lock_manager(void);
+extern void afs_lock_work(struct work_struct *);
+extern void afs_lock_may_be_available(struct afs_vnode *);
+extern int afs_lock(struct file *, int, struct file_lock *);
+extern int afs_flock(struct file *, int, struct file_lock *);
+
+/*
  * fsclient.c
  */
 extern int afs_fs_fetch_file_status(struct afs_server *, struct key *,
@@ -513,6 +530,15 @@ extern int afs_fs_get_volume_status(struct afs_server *, struct key *,
 				    struct afs_vnode *,
 				    struct afs_volume_status *,
 				    const struct afs_wait_mode *);
+extern int afs_fs_set_lock(struct afs_server *, struct key *,
+			   struct afs_vnode *, afs_lock_type_t,
+			   const struct afs_wait_mode *);
+extern int afs_fs_extend_lock(struct afs_server *, struct key *,
+			      struct afs_vnode *,
+			      const struct afs_wait_mode *);
+extern int afs_fs_release_lock(struct afs_server *, struct key *,
+			       struct afs_vnode *,
+			       const struct afs_wait_mode *);
 
 /*
  * inode.c
@@ -681,6 +707,10 @@ extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t,
 extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *);
 extern int afs_vnode_get_volume_status(struct afs_vnode *, struct key *,
 				       struct afs_volume_status *);
+extern int afs_vnode_set_lock(struct afs_vnode *, struct key *,
+			      afs_lock_type_t);
+extern int afs_vnode_extend_lock(struct afs_vnode *, struct key *);
+extern int afs_vnode_release_lock(struct afs_vnode *, struct key *);
 
 /*
  * volume.c
diff --git a/fs/afs/main.c b/fs/afs/main.c
index cd21195..0f60f6b 100644
--- a/fs/afs/main.c
+++ b/fs/afs/main.c
@@ -168,6 +168,7 @@ static void __exit afs_exit(void)
 	printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
 
 	afs_fs_exit();
+	afs_kill_lock_manager();
 	afs_close_socket();
 	afs_purge_servers();
 	afs_callback_update_kill();
diff --git a/fs/afs/misc.c b/fs/afs/misc.c
index d1a889c..2d33a5f 100644
--- a/fs/afs/misc.c
+++ b/fs/afs/misc.c
@@ -35,6 +35,7 @@ int afs_abort_to_error(u32 abort_code)
 	case VOVERQUOTA:	return -EDQUOT;
 	case VBUSY:		return -EBUSY;
 	case VMOVED:		return -ENXIO;
+	case 0x2f6df0a:		return -EWOULDBLOCK;
 	case 0x2f6df0c:		return -EACCES;
 	case 0x2f6df0f:		return -EBUSY;
 	case 0x2f6df10:		return -EEXIST;
diff --git a/fs/afs/proc.c b/fs/afs/proc.c
index 13df512..6edb566 100644
--- a/fs/afs/proc.c
+++ b/fs/afs/proc.c
@@ -201,23 +201,9 @@ static int afs_proc_cells_open(struct inode *inode, struct file *file)
  */
 static void *afs_proc_cells_start(struct seq_file *m, loff_t *_pos)
 {
-	struct list_head *_p;
-	loff_t pos = *_pos;
-
 	/* lock the list against modification */
 	down_read(&afs_proc_cells_sem);
-
-	/* allow for the header line */
-	if (!pos)
-		return (void *) 1;
-	pos--;
-
-	/* find the n'th element in the list */
-	list_for_each(_p, &afs_proc_cells)
-		if (!pos--)
-			break;
-
-	return _p != &afs_proc_cells ? _p : NULL;
+	return seq_list_start_head(&afs_proc_cells, *_pos);
 }
 
 /*
@@ -225,14 +211,7 @@ static void *afs_proc_cells_start(struct seq_file *m, loff_t *_pos)
  */
 static void *afs_proc_cells_next(struct seq_file *p, void *v, loff_t *pos)
 {
-	struct list_head *_p;
-
-	(*pos)++;
-
-	_p = v;
-	_p = v == (void *) 1 ? afs_proc_cells.next : _p->next;
-
-	return _p != &afs_proc_cells ? _p : NULL;
+	return seq_list_next(v, &afs_proc_cells, pos);
 }
 
 /*
@@ -250,7 +229,7 @@ static int afs_proc_cells_show(struct seq_file *m, void *v)
 {
 	struct afs_cell *cell = list_entry(v, struct afs_cell, proc_link);
 
-	if (v == (void *) 1) {
+	if (v == &afs_proc_cells) {
 		/* display header on line 1 */
 		seq_puts(m, "USE NAME\n");
 		return 0;
@@ -503,26 +482,13 @@ static int afs_proc_cell_volumes_release(struct inode *inode, struct file *file)
  */
 static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos)
 {
-	struct list_head *_p;
 	struct afs_cell *cell = m->private;
-	loff_t pos = *_pos;
 
 	_enter("cell=%p pos=%Ld", cell, *_pos);
 
 	/* lock the list against modification */
 	down_read(&cell->vl_sem);
-
-	/* allow for the header line */
-	if (!pos)
-		return (void *) 1;
-	pos--;
-
-	/* find the n'th element in the list */
-	list_for_each(_p, &cell->vl_list)
-		if (!pos--)
-			break;
-
-	return _p != &cell->vl_list ? _p : NULL;
+	return seq_list_start_head(&cell->vl_list, *_pos);
 }
 
 /*
@@ -531,17 +497,10 @@ static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos)
 static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v,
 					loff_t *_pos)
 {
-	struct list_head *_p;
 	struct afs_cell *cell = p->private;
 
 	_enter("cell=%p pos=%Ld", cell, *_pos);
-
-	(*_pos)++;
-
-	_p = v;
-	_p = (v == (void *) 1) ? cell->vl_list.next : _p->next;
-
-	return (_p != &cell->vl_list) ? _p : NULL;
+	return seq_list_next(v, &cell->vl_list, _pos);
 }
 
 /*
@@ -569,11 +528,12 @@ const char afs_vlocation_states[][4] = {
  */
 static int afs_proc_cell_volumes_show(struct seq_file *m, void *v)
 {
+	struct afs_cell *cell = m->private;
 	struct afs_vlocation *vlocation =
 		list_entry(v, struct afs_vlocation, link);
 
 	/* display header on line 1 */
-	if (v == (void *) 1) {
+	if (v == &cell->vl_list) {
 		seq_puts(m, "USE STT VLID[0]  VLID[1]  VLID[2]  NAME\n");
 		return 0;
 	}
@@ -734,26 +694,13 @@ static int afs_proc_cell_servers_release(struct inode *inode,
 static void *afs_proc_cell_servers_start(struct seq_file *m, loff_t *_pos)
 	__acquires(m->private->servers_lock)
 {
-	struct list_head *_p;
 	struct afs_cell *cell = m->private;
-	loff_t pos = *_pos;
 
 	_enter("cell=%p pos=%Ld", cell, *_pos);
 
 	/* lock the list against modification */
 	read_lock(&cell->servers_lock);
-
-	/* allow for the header line */
-	if (!pos)
-		return (void *) 1;
-	pos--;
-
-	/* find the n'th element in the list */
-	list_for_each(_p, &cell->servers)
-		if (!pos--)
-			break;
-
-	return _p != &cell->servers ? _p : NULL;
+	return seq_list_start_head(&cell->servers, *_pos);
 }
 
 /*
@@ -762,17 +709,10 @@ static void *afs_proc_cell_servers_start(struct seq_file *m, loff_t *_pos)
 static void *afs_proc_cell_servers_next(struct seq_file *p, void *v,
 					loff_t *_pos)
 {
-	struct list_head *_p;
 	struct afs_cell *cell = p->private;
 
 	_enter("cell=%p pos=%Ld", cell, *_pos);
-
-	(*_pos)++;
-
-	_p = v;
-	_p = v == (void *) 1 ? cell->servers.next : _p->next;
-
-	return _p != &cell->servers ? _p : NULL;
+	return seq_list_next(v, &cell->servers, _pos);
 }
 
 /*
@@ -791,11 +731,12 @@ static void afs_proc_cell_servers_stop(struct seq_file *p, void *v)
  */
 static int afs_proc_cell_servers_show(struct seq_file *m, void *v)
 {
+	struct afs_cell *cell = m->private;
 	struct afs_server *server = list_entry(v, struct afs_server, link);
 	char ipaddr[20];
 
 	/* display header on line 1 */
-	if (v == (void *) 1) {
+	if (v == &cell->servers) {
 		seq_puts(m, "USE ADDR            STATE\n");
 		return 0;
 	}
diff --git a/fs/afs/super.c b/fs/afs/super.c
index 2e8496b..993cdf1 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -460,6 +460,9 @@ static void afs_i_init_once(void *_vnode, struct kmem_cache *cachep,
 	spin_lock_init(&vnode->writeback_lock);
 	spin_lock_init(&vnode->lock);
 	INIT_LIST_HEAD(&vnode->writebacks);
+	INIT_LIST_HEAD(&vnode->pending_locks);
+	INIT_LIST_HEAD(&vnode->granted_locks);
+	INIT_DELAYED_WORK(&vnode->lock_work, afs_lock_work);
 	INIT_WORK(&vnode->cb_broken_work, afs_broken_callback_work);
 }
 
diff --git a/fs/afs/vnode.c b/fs/afs/vnode.c
index 232c55d..2f05c4f 100644
--- a/fs/afs/vnode.c
+++ b/fs/afs/vnode.c
@@ -561,7 +561,7 @@ no_server:
 /*
  * create a hard link
  */
-extern int afs_vnode_link(struct afs_vnode *dvnode, struct afs_vnode *vnode,
+int afs_vnode_link(struct afs_vnode *dvnode, struct afs_vnode *vnode,
 			  struct key *key, const char *name)
 {
 	struct afs_server *server;
@@ -887,11 +887,6 @@ int afs_vnode_get_volume_status(struct afs_vnode *vnode, struct key *key,
 	       vnode->fid.unique,
 	       key_serial(key));
 
-	/* this op will fetch the status */
-	spin_lock(&vnode->lock);
-	vnode->update_cnt++;
-	spin_unlock(&vnode->lock);
-
 	do {
 		/* pick a server to query */
 		server = afs_volume_pick_fileserver(vnode);
@@ -905,20 +900,127 @@ int afs_vnode_get_volume_status(struct afs_vnode *vnode, struct key *key,
 	} while (!afs_volume_release_fileserver(vnode, server, ret));
 
 	/* adjust the flags */
-	if (ret == 0) {
-		afs_vnode_finalise_status_update(vnode, server);
+	if (ret == 0)
+		afs_put_server(server);
+
+	_leave(" = %d", ret);
+	return ret;
+
+no_server:
+	return PTR_ERR(server);
+}
+
+/*
+ * get a lock on a file
+ */
+int afs_vnode_set_lock(struct afs_vnode *vnode, struct key *key,
+		       afs_lock_type_t type)
+{
+	struct afs_server *server;
+	int ret;
+
+	_enter("%s{%x:%u.%u},%x,%u",
+	       vnode->volume->vlocation->vldb.name,
+	       vnode->fid.vid,
+	       vnode->fid.vnode,
+	       vnode->fid.unique,
+	       key_serial(key), type);
+
+	do {
+		/* pick a server to query */
+		server = afs_volume_pick_fileserver(vnode);
+		if (IS_ERR(server))
+			goto no_server;
+
+		_debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+		ret = afs_fs_set_lock(server, key, vnode, type, &afs_sync_call);
+
+	} while (!afs_volume_release_fileserver(vnode, server, ret));
+
+	/* adjust the flags */
+	if (ret == 0)
+		afs_put_server(server);
+
+	_leave(" = %d", ret);
+	return ret;
+
+no_server:
+	return PTR_ERR(server);
+}
+
+/*
+ * extend a lock on a file
+ */
+int afs_vnode_extend_lock(struct afs_vnode *vnode, struct key *key)
+{
+	struct afs_server *server;
+	int ret;
+
+	_enter("%s{%x:%u.%u},%x",
+	       vnode->volume->vlocation->vldb.name,
+	       vnode->fid.vid,
+	       vnode->fid.vnode,
+	       vnode->fid.unique,
+	       key_serial(key));
+
+	do {
+		/* pick a server to query */
+		server = afs_volume_pick_fileserver(vnode);
+		if (IS_ERR(server))
+			goto no_server;
+
+		_debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+		ret = afs_fs_extend_lock(server, key, vnode, &afs_sync_call);
+
+	} while (!afs_volume_release_fileserver(vnode, server, ret));
+
+	/* adjust the flags */
+	if (ret == 0)
+		afs_put_server(server);
+
+	_leave(" = %d", ret);
+	return ret;
+
+no_server:
+	return PTR_ERR(server);
+}
+
+/*
+ * release a lock on a file
+ */
+int afs_vnode_release_lock(struct afs_vnode *vnode, struct key *key)
+{
+	struct afs_server *server;
+	int ret;
+
+	_enter("%s{%x:%u.%u},%x",
+	       vnode->volume->vlocation->vldb.name,
+	       vnode->fid.vid,
+	       vnode->fid.vnode,
+	       vnode->fid.unique,
+	       key_serial(key));
+
+	do {
+		/* pick a server to query */
+		server = afs_volume_pick_fileserver(vnode);
+		if (IS_ERR(server))
+			goto no_server;
+
+		_debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+		ret = afs_fs_release_lock(server, key, vnode, &afs_sync_call);
+
+	} while (!afs_volume_release_fileserver(vnode, server, ret));
+
+	/* adjust the flags */
+	if (ret == 0)
 		afs_put_server(server);
-	} else {
-		afs_vnode_status_update_failed(vnode, ret);
-	}
 
 	_leave(" = %d", ret);
 	return ret;
 
 no_server:
-	spin_lock(&vnode->lock);
-	vnode->update_cnt--;
-	ASSERTCMP(vnode->update_cnt, >=, 0);
-	spin_unlock(&vnode->lock);
 	return PTR_ERR(server);
 }
diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c
index 40fe3a3..b4a7588 100644
--- a/fs/anon_inodes.c
+++ b/fs/anon_inodes.c
@@ -53,7 +53,7 @@ static struct dentry_operations anon_inodefs_dentry_operations = {
 };
 
 /**
- * anon_inode_getfd - creates a new file instance by hooking it up to and
+ * anon_inode_getfd - creates a new file instance by hooking it up to an
  *                    anonymous inode, and a dentry that describe the "class"
  *                    of the file
  *
@@ -66,7 +66,7 @@ static struct dentry_operations anon_inodefs_dentry_operations = {
  *
  * Creates a new file by hooking it on a single inode. This is useful for files
  * that do not need to have a full-fledged inode in order to operate correctly.
- * All the files created with anon_inode_getfd() will share a single inode, by
+ * All the files created with anon_inode_getfd() will share a single inode,
  * hence saving memory and avoiding code duplication for the file/inode/dentry
  * setup.
  */
@@ -139,11 +139,12 @@ err_put_filp:
 	put_filp(file);
 	return error;
 }
+EXPORT_SYMBOL_GPL(anon_inode_getfd);
 
 /*
- * A single inode exist for all anon_inode files. Contrary to pipes,
- * anon_inode inodes has no per-instance data associated, so we can avoid
- * the allocation of multiple of them.
+ * A single inode exists for all anon_inode files. Contrary to pipes,
+ * anon_inode inodes have no associated per-instance data, so we need
+ * only allocate one of them.
  */
 static struct inode *anon_inode_mkinode(void)
 {
diff --git a/fs/attr.c b/fs/attr.c
index a0a0c7b..f8dfc22 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -42,7 +42,7 @@ int inode_change_ok(struct inode *inode, struct iattr *attr)
 
 	/* Make sure a caller can chmod. */
 	if (ia_valid & ATTR_MODE) {
-		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+		if (!is_owner_or_cap(inode))
 			goto error;
 		/* Also check the setgid bit! */
 		if (!in_group_p((ia_valid & ATTR_GID) ? attr->ia_gid :
@@ -52,7 +52,7 @@ int inode_change_ok(struct inode *inode, struct iattr *attr)
 
 	/* Check for setting the inode time. */
 	if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) {
-		if (current->fsuid != inode->i_uid && !capable(CAP_FOWNER))
+		if (!is_owner_or_cap(inode))
 			goto error;
 	}
 fine:
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index 329ee47..521ff7c 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -114,12 +114,6 @@ static int bad_file_lock(struct file *file, int cmd, struct file_lock *fl)
 	return -EIO;
 }
 
-static ssize_t bad_file_sendfile(struct file *in_file, loff_t *ppos,
-			size_t count, read_actor_t actor, void *target)
-{
-	return -EIO;
-}
-
 static ssize_t bad_file_sendpage(struct file *file, struct page *page,
 			int off, size_t len, loff_t *pos, int more)
 {
@@ -182,7 +176,6 @@ static const struct file_operations bad_file_ops =
 	.aio_fsync	= bad_file_aio_fsync,
 	.fasync		= bad_file_fasync,
 	.lock		= bad_file_lock,
-	.sendfile	= bad_file_sendfile,
 	.sendpage	= bad_file_sendpage,
 	.get_unmapped_area = bad_file_get_unmapped_area,
 	.check_flags	= bad_file_check_flags,
diff --git a/fs/bfs/file.c b/fs/bfs/file.c
index ef4d1fa..24310e9 100644
--- a/fs/bfs/file.c
+++ b/fs/bfs/file.c
@@ -24,7 +24,7 @@ const struct file_operations bfs_file_operations = {
 	.write		= do_sync_write,
 	.aio_write	= generic_file_aio_write,
 	.mmap		= generic_file_mmap,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 };
 
 static int bfs_move_block(unsigned long from, unsigned long to, struct super_block *sb)
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index fa8ea33..a27e42b 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -45,7 +45,7 @@
 
 static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs);
 static int load_elf_library(struct file *);
-static unsigned long elf_map (struct file *, unsigned long, struct elf_phdr *, int, int);
+static unsigned long elf_map (struct file *, unsigned long, struct elf_phdr *, int, int, unsigned long);
 
 /*
  * If we don't support core dumping, then supply a NULL so we
@@ -80,7 +80,7 @@ static struct linux_binfmt elf_format = {
 		.hasvdso	= 1
 };
 
-#define BAD_ADDR(x) ((unsigned long)(x) >= TASK_SIZE)
+#define BAD_ADDR(x) IS_ERR_VALUE(x)
 
 static int set_brk(unsigned long start, unsigned long end)
 {
@@ -285,33 +285,70 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
 #ifndef elf_map
 
 static unsigned long elf_map(struct file *filep, unsigned long addr,
-		struct elf_phdr *eppnt, int prot, int type)
+		struct elf_phdr *eppnt, int prot, int type,
+		unsigned long total_size)
 {
 	unsigned long map_addr;
-	unsigned long pageoffset = ELF_PAGEOFFSET(eppnt->p_vaddr);
+	unsigned long size = eppnt->p_filesz + ELF_PAGEOFFSET(eppnt->p_vaddr);
+	unsigned long off = eppnt->p_offset - ELF_PAGEOFFSET(eppnt->p_vaddr);
+	addr = ELF_PAGESTART(addr);
+	size = ELF_PAGEALIGN(size);
 
-	down_write(&current->mm->mmap_sem);
 	/* mmap() will return -EINVAL if given a zero size, but a
 	 * segment with zero filesize is perfectly valid */
-	if (eppnt->p_filesz + pageoffset)
-		map_addr = do_mmap(filep, ELF_PAGESTART(addr),
-				   eppnt->p_filesz + pageoffset, prot, type,
-				   eppnt->p_offset - pageoffset);
-	else
-		map_addr = ELF_PAGESTART(addr);
+	if (!size)
+		return addr;
+
+	down_write(&current->mm->mmap_sem);
+	/*
+	* total_size is the size of the ELF (interpreter) image.
+	* The _first_ mmap needs to know the full size, otherwise
+	* randomization might put this image into an overlapping
+	* position with the ELF binary image. (since size < total_size)
+	* So we first map the 'big' image - and unmap the remainder at
+	* the end. (which unmap is needed for ELF images with holes.)
+	*/
+	if (total_size) {
+		total_size = ELF_PAGEALIGN(total_size);
+		map_addr = do_mmap(filep, addr, total_size, prot, type, off);
+		if (!BAD_ADDR(map_addr))
+			do_munmap(current->mm, map_addr+size, total_size-size);
+	} else
+		map_addr = do_mmap(filep, addr, size, prot, type, off);
+
 	up_write(&current->mm->mmap_sem);
 	return(map_addr);
 }
 
 #endif /* !elf_map */
 
+static unsigned long total_mapping_size(struct elf_phdr *cmds, int nr)
+{
+	int i, first_idx = -1, last_idx = -1;
+
+	for (i = 0; i < nr; i++) {
+		if (cmds[i].p_type == PT_LOAD) {
+			last_idx = i;
+			if (first_idx == -1)
+				first_idx = i;
+		}
+	}
+	if (first_idx == -1)
+		return 0;
+
+	return cmds[last_idx].p_vaddr + cmds[last_idx].p_memsz -
+				ELF_PAGESTART(cmds[first_idx].p_vaddr);
+}
+
+
 /* This is much more generalized than the library routine read function,
    so we keep this separate.  Technically the library read function
    is only provided so that we can read a.out libraries that have
    an ELF header */
 
 static unsigned long load_elf_interp(struct elfhdr *interp_elf_ex,
-		struct file *interpreter, unsigned long *interp_load_addr)
+		struct file *interpreter, unsigned long *interp_map_addr,
+		unsigned long no_base)
 {
 	struct elf_phdr *elf_phdata;
 	struct elf_phdr *eppnt;
@@ -319,6 +356,7 @@ static unsigned long load_elf_interp(struct elfhdr *interp_elf_ex,
 	int load_addr_set = 0;
 	unsigned long last_bss = 0, elf_bss = 0;
 	unsigned long error = ~0UL;
+	unsigned long total_size;
 	int retval, i, size;
 
 	/* First of all, some simple consistency checks */
@@ -357,6 +395,12 @@ static unsigned long load_elf_interp(struct elfhdr *interp_elf_ex,
 		goto out_close;
 	}
 
+	total_size = total_mapping_size(elf_phdata, interp_elf_ex->e_phnum);
+	if (!total_size) {
+		error = -EINVAL;
+		goto out_close;
+	}
+
 	eppnt = elf_phdata;
 	for (i = 0; i < interp_elf_ex->e_phnum; i++, eppnt++) {
 		if (eppnt->p_type == PT_LOAD) {
@@ -374,9 +418,14 @@ static unsigned long load_elf_interp(struct elfhdr *interp_elf_ex,
 			vaddr = eppnt->p_vaddr;
 			if (interp_elf_ex->e_type == ET_EXEC || load_addr_set)
 				elf_type |= MAP_FIXED;
+			else if (no_base && interp_elf_ex->e_type == ET_DYN)
+				load_addr = -vaddr;
 
 			map_addr = elf_map(interpreter, load_addr + vaddr,
-					   eppnt, elf_prot, elf_type);
+					   eppnt, elf_prot, elf_type, total_size);
+			total_size = 0;
+			if (!*interp_map_addr)
+				*interp_map_addr = map_addr;
 			error = map_addr;
 			if (BAD_ADDR(map_addr))
 				goto out_close;
@@ -442,8 +491,7 @@ static unsigned long load_elf_interp(struct elfhdr *interp_elf_ex,
 			goto out_close;
 	}
 
-	*interp_load_addr = load_addr;
-	error = ((unsigned long)interp_elf_ex->e_entry) + load_addr;
+	error = load_addr;
 
 out_close:
 	kfree(elf_phdata);
@@ -540,7 +588,8 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
 	int elf_exec_fileno;
 	int retval, i;
 	unsigned int size;
-	unsigned long elf_entry, interp_load_addr = 0;
+	unsigned long elf_entry;
+	unsigned long interp_load_addr = 0;
 	unsigned long start_code, end_code, start_data, end_data;
 	unsigned long reloc_func_desc = 0;
 	char passed_fileno[6];
@@ -808,9 +857,7 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
 	current->mm->start_stack = bprm->p;
 
 	/* Now we do a little grungy work by mmaping the ELF image into
-	   the correct location in memory.  At this point, we assume that
-	   the image should be loaded at fixed address, not at a variable
-	   address. */
+	   the correct location in memory. */
 	for(i = 0, elf_ppnt = elf_phdata;
 	    i < loc->elf_ex.e_phnum; i++, elf_ppnt++) {
 		int elf_prot = 0, elf_flags;
@@ -864,11 +911,15 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
 			 * default mmap base, as well as whatever program they
 			 * might try to exec.  This is because the brk will
 			 * follow the loader, and is not movable.  */
+#ifdef CONFIG_X86
+			load_bias = 0;
+#else
 			load_bias = ELF_PAGESTART(ELF_ET_DYN_BASE - vaddr);
+#endif
 		}
 
 		error = elf_map(bprm->file, load_bias + vaddr, elf_ppnt,
-				elf_prot, elf_flags);
+				elf_prot, elf_flags,0);
 		if (BAD_ADDR(error)) {
 			send_sig(SIGKILL, current, 0);
 			retval = IS_ERR((void *)error) ?
@@ -944,13 +995,25 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
 	}
 
 	if (elf_interpreter) {
-		if (interpreter_type == INTERPRETER_AOUT)
+		if (interpreter_type == INTERPRETER_AOUT) {
 			elf_entry = load_aout_interp(&loc->interp_ex,
 						     interpreter);
-		else
+		} else {
+			unsigned long uninitialized_var(interp_map_addr);
+
 			elf_entry = load_elf_interp(&loc->interp_elf_ex,
 						    interpreter,
-						    &interp_load_addr);
+						    &interp_map_addr,
+						    load_bias);
+			if (!BAD_ADDR(elf_entry)) {
+				/*
+				 * load_elf_interp() returns relocation
+				 * adjustment
+				 */
+				interp_load_addr = elf_entry;
+				elf_entry += loc->interp_elf_ex.e_entry;
+			}
+		}
 		if (BAD_ADDR(elf_entry)) {
 			force_sig(SIGSEGV, current);
 			retval = IS_ERR((void *)elf_entry) ?
@@ -1499,6 +1562,9 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file)
 #endif
 	int thread_status_size = 0;
 	elf_addr_t *auxv;
+#ifdef ELF_CORE_WRITE_EXTRA_NOTES
+	int extra_notes_size;
+#endif
 
 	/*
 	 * We no longer stop all VM operations.
@@ -1628,7 +1694,8 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file)
 		sz += thread_status_size;
 
 #ifdef ELF_CORE_WRITE_EXTRA_NOTES
-		sz += ELF_CORE_EXTRA_NOTES_SIZE;
+		extra_notes_size = ELF_CORE_EXTRA_NOTES_SIZE;
+		sz += extra_notes_size;
 #endif
 
 		fill_elf_note_phdr(&phdr, sz, offset);
@@ -1674,6 +1741,7 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file)
 
 #ifdef ELF_CORE_WRITE_EXTRA_NOTES
 	ELF_CORE_WRITE_EXTRA_NOTES;
+	foffset += extra_notes_size;
 #endif
 
 	/* write out the thread status notes section */
diff --git a/fs/bio.c b/fs/bio.c
index 093345f..33e4634 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -1223,8 +1223,6 @@ EXPORT_SYMBOL(bio_hw_segments);
 EXPORT_SYMBOL(bio_add_page);
 EXPORT_SYMBOL(bio_add_pc_page);
 EXPORT_SYMBOL(bio_get_nr_vecs);
-EXPORT_SYMBOL(bio_map_user);
-EXPORT_SYMBOL(bio_unmap_user);
 EXPORT_SYMBOL(bio_map_kern);
 EXPORT_SYMBOL(bio_pair_release);
 EXPORT_SYMBOL(bio_split);
diff --git a/fs/block_dev.c b/fs/block_dev.c
index ea1480a..3635315e 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -588,12 +588,10 @@ EXPORT_SYMBOL(bdget);
 
 long nr_blockdev_pages(void)
 {
-	struct list_head *p;
+	struct block_device *bdev;
 	long ret = 0;
 	spin_lock(&bdev_lock);
-	list_for_each(p, &all_bdevs) {
-		struct block_device *bdev;
-		bdev = list_entry(p, struct block_device, bd_list);
+	list_for_each_entry(bdev, &all_bdevs, bd_list) {
 		ret += bdev->bd_inode->i_mapping->nrpages;
 	}
 	spin_unlock(&bdev_lock);
@@ -874,7 +872,7 @@ static struct bd_holder *find_bd_holder(struct block_device *bdev,
  */
 static int add_bd_holder(struct block_device *bdev, struct bd_holder *bo)
 {
-	int ret;
+	int err;
 
 	if (!bo)
 		return -EINVAL;
@@ -882,15 +880,18 @@ static int add_bd_holder(struct block_device *bdev, struct bd_holder *bo)
 	if (!bd_holder_grab_dirs(bdev, bo))
 		return -EBUSY;
 
-	ret = add_symlink(bo->sdir, bo->sdev);
-	if (ret == 0) {
-		ret = add_symlink(bo->hdir, bo->hdev);
-		if (ret)
-			del_symlink(bo->sdir, bo->sdev);
+	err = add_symlink(bo->sdir, bo->sdev);
+	if (err)
+		return err;
+
+	err = add_symlink(bo->hdir, bo->hdev);
+	if (err) {
+		del_symlink(bo->sdir, bo->sdev);
+		return err;
 	}
-	if (ret == 0)
-		list_add_tail(&bo->list, &bdev->bd_holder_list);
-	return ret;
+
+	list_add_tail(&bo->list, &bdev->bd_holder_list);
+	return 0;
 }
 
 /**
@@ -948,7 +949,7 @@ static struct bd_holder *del_bd_holder(struct block_device *bdev,
 static int bd_claim_by_kobject(struct block_device *bdev, void *holder,
 				struct kobject *kobj)
 {
-	int res;
+	int err;
 	struct bd_holder *bo, *found;
 
 	if (!kobj)
@@ -959,21 +960,24 @@ static int bd_claim_by_kobject(struct block_device *bdev, void *holder,
 		return -ENOMEM;
 
 	mutex_lock(&bdev->bd_mutex);
-	res = bd_claim(bdev, holder);
-	if (res == 0) {
-		found = find_bd_holder(bdev, bo);
-		if (found == NULL) {
-			res = add_bd_holder(bdev, bo);
-			if (res)
-				bd_release(bdev);
-		}
-	}
 
-	if (res || found)
-		free_bd_holder(bo);
-	mutex_unlock(&bdev->bd_mutex);
+	err = bd_claim(bdev, holder);
+	if (err)
+		goto fail;
 
-	return res;
+	found = find_bd_holder(bdev, bo);
+	if (found)
+		goto fail;
+
+	err = add_bd_holder(bdev, bo);
+	if (err)
+		bd_release(bdev);
+	else
+		bo = NULL;
+fail:
+	mutex_unlock(&bdev->bd_mutex);
+	free_bd_holder(bo);
+	return err;
 }
 
 /**
@@ -987,15 +991,12 @@ static int bd_claim_by_kobject(struct block_device *bdev, void *holder,
 static void bd_release_from_kobject(struct block_device *bdev,
 					struct kobject *kobj)
 {
-	struct bd_holder *bo;
-
 	if (!kobj)
 		return;
 
 	mutex_lock(&bdev->bd_mutex);
 	bd_release(bdev);
-	if ((bo = del_bd_holder(bdev, kobj)))
-		free_bd_holder(bo);
+	free_bd_holder(del_bd_holder(bdev, kobj));
 	mutex_unlock(&bdev->bd_mutex);
 }
 
@@ -1346,7 +1347,6 @@ const struct file_operations def_blk_fops = {
 #ifdef CONFIG_COMPAT
 	.compat_ioctl	= compat_blkdev_ioctl,
 #endif
-	.sendfile	= generic_file_sendfile,
 	.splice_read	= generic_file_splice_read,
 	.splice_write	= generic_file_splice_write,
 };
diff --git a/fs/buffer.c b/fs/buffer.c
index aa68206..0f90067 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -356,7 +356,7 @@ static void free_more_memory(void)
 	for_each_online_pgdat(pgdat) {
 		zones = pgdat->node_zonelists[gfp_zone(GFP_NOFS)].zones;
 		if (*zones)
-			try_to_free_pages(zones, GFP_NOFS);
+			try_to_free_pages(zones, 0, GFP_NOFS);
 	}
 }
 
@@ -676,6 +676,39 @@ void mark_buffer_dirty_inode(struct buffer_head *bh, struct inode *inode)
 EXPORT_SYMBOL(mark_buffer_dirty_inode);
 
 /*
+ * Mark the page dirty, and set it dirty in the radix tree, and mark the inode
+ * dirty.
+ *
+ * If warn is true, then emit a warning if the page is not uptodate and has
+ * not been truncated.
+ */
+static int __set_page_dirty(struct page *page,
+		struct address_space *mapping, int warn)
+{
+	if (unlikely(!mapping))
+		return !TestSetPageDirty(page);
+
+	if (TestSetPageDirty(page))
+		return 0;
+
+	write_lock_irq(&mapping->tree_lock);
+	if (page->mapping) {	/* Race with truncate? */
+		WARN_ON_ONCE(warn && !PageUptodate(page));
+
+		if (mapping_cap_account_dirty(mapping)) {
+			__inc_zone_page_state(page, NR_FILE_DIRTY);
+			task_io_account_write(PAGE_CACHE_SIZE);
+		}
+		radix_tree_tag_set(&mapping->page_tree,
+				page_index(page), PAGECACHE_TAG_DIRTY);
+	}
+	write_unlock_irq(&mapping->tree_lock);
+	__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
+
+	return 1;
+}
+
+/*
  * Add a page to the dirty page list.
  *
  * It is a sad fact of life that this function is called from several places
@@ -702,7 +735,7 @@ EXPORT_SYMBOL(mark_buffer_dirty_inode);
  */
 int __set_page_dirty_buffers(struct page *page)
 {
-	struct address_space * const mapping = page_mapping(page);
+	struct address_space *mapping = page_mapping(page);
 
 	if (unlikely(!mapping))
 		return !TestSetPageDirty(page);
@@ -719,21 +752,7 @@ int __set_page_dirty_buffers(struct page *page)
 	}
 	spin_unlock(&mapping->private_lock);
 
-	if (TestSetPageDirty(page))
-		return 0;
-
-	write_lock_irq(&mapping->tree_lock);
-	if (page->mapping) {	/* Race with truncate? */
-		if (mapping_cap_account_dirty(mapping)) {
-			__inc_zone_page_state(page, NR_FILE_DIRTY);
-			task_io_account_write(PAGE_CACHE_SIZE);
-		}
-		radix_tree_tag_set(&mapping->page_tree,
-				page_index(page), PAGECACHE_TAG_DIRTY);
-	}
-	write_unlock_irq(&mapping->tree_lock);
-	__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
-	return 1;
+	return __set_page_dirty(page, mapping, 1);
 }
 EXPORT_SYMBOL(__set_page_dirty_buffers);
 
@@ -982,7 +1001,7 @@ grow_dev_page(struct block_device *bdev, sector_t block,
 	struct buffer_head *bh;
 
 	page = find_or_create_page(inode->i_mapping, index,
-		mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
+		(mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS)|__GFP_MOVABLE);
 	if (!page)
 		return NULL;
 
@@ -1026,11 +1045,6 @@ failed:
 /*
  * Create buffers for the specified block device block's page.  If
  * that page was dirty, the buffers are set dirty also.
- *
- * Except that's a bug.  Attaching dirty buffers to a dirty
- * blockdev's page can result in filesystem corruption, because
- * some of those buffers may be aliases of filesystem data.
- * grow_dev_page() will go BUG() if this happens.
  */
 static int
 grow_buffers(struct block_device *bdev, sector_t block, int size)
@@ -1137,8 +1151,9 @@ __getblk_slow(struct block_device *bdev, sector_t block, int size)
  */
 void fastcall mark_buffer_dirty(struct buffer_head *bh)
 {
+	WARN_ON_ONCE(!buffer_uptodate(bh));
 	if (!buffer_dirty(bh) && !test_set_buffer_dirty(bh))
-		__set_page_dirty_nobuffers(bh->b_page);
+		__set_page_dirty(bh->b_page, page_mapping(bh->b_page), 0);
 }
 
 /*
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 1cebb7e..1fd0dc8 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -623,7 +623,7 @@ const struct file_operations cifs_file_ops = {
 	.fsync = cifs_fsync,
 	.flush = cifs_flush,
 	.mmap  = cifs_file_mmap,
-	.sendfile = generic_file_sendfile,
+	.splice_read = generic_file_splice_read,
 	.llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_POSIX
 	.ioctl	= cifs_ioctl,
@@ -644,7 +644,7 @@ const struct file_operations cifs_file_direct_ops = {
 	.lock = cifs_lock,
 	.fsync = cifs_fsync,
 	.flush = cifs_flush,
-	.sendfile = generic_file_sendfile, /* BB removeme BB */
+	.splice_read = generic_file_splice_read,
 #ifdef CONFIG_CIFS_POSIX
 	.ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
@@ -663,7 +663,7 @@ const struct file_operations cifs_file_nobrl_ops = {
 	.fsync = cifs_fsync,
 	.flush = cifs_flush,
 	.mmap  = cifs_file_mmap,
-	.sendfile = generic_file_sendfile,
+	.splice_read = generic_file_splice_read,
 	.llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_POSIX
 	.ioctl	= cifs_ioctl,
@@ -683,7 +683,7 @@ const struct file_operations cifs_file_direct_nobrl_ops = {
 	.release = cifs_close,
 	.fsync = cifs_fsync,
 	.flush = cifs_flush,
-	.sendfile = generic_file_sendfile, /* BB removeme BB */
+	.splice_read = generic_file_splice_read,
 #ifdef CONFIG_CIFS_POSIX
 	.ioctl  = cifs_ioctl,
 #endif /* CONFIG_CIFS_POSIX */
@@ -856,6 +856,7 @@ static int cifs_oplock_thread(void *dummyarg)
 	__u16  netfid;
 	int rc;
 
+	set_freezable();
 	do {
 		if (try_to_freeze())
 			continue;
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index e93da7a..4af3588 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -364,6 +364,7 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
 			GFP_KERNEL);
 	}
 
+	set_freezable();
 	while (!kthread_should_stop()) {
 		if (try_to_freeze())
 			continue;
diff --git a/fs/cifs/export.c b/fs/cifs/export.c
index c21d3d0..893fd0a 100644
--- a/fs/cifs/export.c
+++ b/fs/cifs/export.c
@@ -44,9 +44,7 @@
 #include "cifsglob.h"
 #include "cifs_debug.h"
 
-
 #ifdef CONFIG_CIFS_EXPERIMENTAL
-
 static struct dentry *cifs_get_parent(struct dentry *dentry)
 {
 	/* BB need to add code here eventually to enable export via NFSD */
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index 9ddf5ed..898a86d 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -470,7 +470,7 @@ int coda_readdir(struct file *coda_file, void *dirent, filldir_t filldir)
 
 		ret = -ENOENT;
 		if (!IS_DEADDIR(host_inode)) {
-			ret = host_file->f_op->readdir(host_file, filldir, dirent);
+			ret = host_file->f_op->readdir(host_file, dirent, filldir);
 			file_accessed(host_file);
 		}
 	}
diff --git a/fs/coda/file.c b/fs/coda/file.c
index 5ef2b60..99dbe86 100644
--- a/fs/coda/file.c
+++ b/fs/coda/file.c
@@ -47,8 +47,9 @@ coda_file_read(struct file *coda_file, char __user *buf, size_t count, loff_t *p
 }
 
 static ssize_t
-coda_file_sendfile(struct file *coda_file, loff_t *ppos, size_t count,
-		   read_actor_t actor, void *target)
+coda_file_splice_read(struct file *coda_file, loff_t *ppos,
+		      struct pipe_inode_info *pipe, size_t count,
+		      unsigned int flags)
 {
 	struct coda_file_info *cfi;
 	struct file *host_file;
@@ -57,10 +58,10 @@ coda_file_sendfile(struct file *coda_file, loff_t *ppos, size_t count,
 	BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
 	host_file = cfi->cfi_container;
 
-	if (!host_file->f_op || !host_file->f_op->sendfile)
+	if (!host_file->f_op || !host_file->f_op->splice_read)
 		return -EINVAL;
 
-	return host_file->f_op->sendfile(host_file, ppos, count, actor, target);
+	return host_file->f_op->splice_read(host_file, ppos, pipe, count,flags);
 }
 
 static ssize_t
@@ -295,6 +296,6 @@ const struct file_operations coda_file_operations = {
 	.flush		= coda_flush,
 	.release	= coda_release,
 	.fsync		= coda_fsync,
-	.sendfile	= coda_file_sendfile,
+	.splice_read	= coda_file_splice_read,
 };
 
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 6b44cdc..e440a7b 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -63,6 +63,7 @@
 #include <linux/wireless.h>
 #include <linux/atalk.h>
 #include <linux/blktrace_api.h>
+#include <linux/loop.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci.h>
@@ -3489,6 +3490,9 @@ HANDLE_IOCTL(LPSETTIMEOUT, lp_timeout_trans)
 
 IGNORE_IOCTL(VFAT_IOCTL_READDIR_BOTH32)
 IGNORE_IOCTL(VFAT_IOCTL_READDIR_SHORT32)
+
+/* loop */
+IGNORE_IOCTL(LOOP_CLR_FD)
 };
 
 #define IOCTL_HASHSIZE 256
diff --git a/fs/configfs/configfs_internal.h b/fs/configfs/configfs_internal.h
index 7b48c03..3b0185f 100644
--- a/fs/configfs/configfs_internal.h
+++ b/fs/configfs/configfs_internal.h
@@ -29,10 +29,11 @@
 
 struct configfs_dirent {
 	atomic_t		s_count;
+	int			s_dependent_count;
 	struct list_head	s_sibling;
 	struct list_head	s_children;
 	struct list_head	s_links;
-	void 			* s_element;
+	void			* s_element;
 	int			s_type;
 	umode_t			s_mode;
 	struct dentry		* s_dentry;
@@ -41,8 +42,8 @@ struct configfs_dirent {
 
 #define CONFIGFS_ROOT		0x0001
 #define CONFIGFS_DIR		0x0002
-#define CONFIGFS_ITEM_ATTR 	0x0004
-#define CONFIGFS_ITEM_LINK 	0x0020
+#define CONFIGFS_ITEM_ATTR	0x0004
+#define CONFIGFS_ITEM_LINK	0x0020
 #define CONFIGFS_USET_DIR	0x0040
 #define CONFIGFS_USET_DEFAULT	0x0080
 #define CONFIGFS_USET_DROPPING	0x0100
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 5e6e37e..2f436d4 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -355,6 +355,10 @@ static int configfs_detach_prep(struct dentry *dentry)
 			/* Mark that we've taken i_mutex */
 			sd->s_type |= CONFIGFS_USET_DROPPING;
 
+			/*
+			 * Yup, recursive.  If there's a problem, blame
+			 * deep nesting of default_groups
+			 */
 			ret = configfs_detach_prep(sd->s_dentry);
 			if (!ret)
 				continue;
@@ -562,7 +566,7 @@ static int populate_groups(struct config_group *group)
 
 /*
  * All of link_obj/unlink_obj/link_group/unlink_group require that
- * subsys->su_sem is held.
+ * subsys->su_mutex is held.
  */
 
 static void unlink_obj(struct config_item *item)
@@ -714,6 +718,28 @@ static void configfs_detach_group(struct config_item *item)
 }
 
 /*
+ * After the item has been detached from the filesystem view, we are
+ * ready to tear it out of the hierarchy.  Notify the client before
+ * we do that so they can perform any cleanup that requires
+ * navigating the hierarchy.  A client does not need to provide this
+ * callback.  The subsystem semaphore MUST be held by the caller, and
+ * references must be valid for both items.  It also assumes the
+ * caller has validated ci_type.
+ */
+static void client_disconnect_notify(struct config_item *parent_item,
+				     struct config_item *item)
+{
+	struct config_item_type *type;
+
+	type = parent_item->ci_type;
+	BUG_ON(!type);
+
+	if (type->ct_group_ops && type->ct_group_ops->disconnect_notify)
+		type->ct_group_ops->disconnect_notify(to_config_group(parent_item),
+						      item);
+}
+
+/*
  * Drop the initial reference from make_item()/make_group()
  * This function assumes that reference is held on item
  * and that item holds a valid reference to the parent.  Also, it
@@ -733,11 +759,244 @@ static void client_drop_item(struct config_item *parent_item,
 	 */
 	if (type->ct_group_ops && type->ct_group_ops->drop_item)
 		type->ct_group_ops->drop_item(to_config_group(parent_item),
-						item);
+					      item);
 	else
 		config_item_put(item);
 }
 
+#ifdef DEBUG
+static void configfs_dump_one(struct configfs_dirent *sd, int level)
+{
+	printk(KERN_INFO "%*s\"%s\":\n", level, " ", configfs_get_name(sd));
+
+#define type_print(_type) if (sd->s_type & _type) printk(KERN_INFO "%*s %s\n", level, " ", #_type);
+	type_print(CONFIGFS_ROOT);
+	type_print(CONFIGFS_DIR);
+	type_print(CONFIGFS_ITEM_ATTR);
+	type_print(CONFIGFS_ITEM_LINK);
+	type_print(CONFIGFS_USET_DIR);
+	type_print(CONFIGFS_USET_DEFAULT);
+	type_print(CONFIGFS_USET_DROPPING);
+#undef type_print
+}
+
+static int configfs_dump(struct configfs_dirent *sd, int level)
+{
+	struct configfs_dirent *child_sd;
+	int ret = 0;
+
+	configfs_dump_one(sd, level);
+
+	if (!(sd->s_type & (CONFIGFS_DIR|CONFIGFS_ROOT)))
+		return 0;
+
+	list_for_each_entry(child_sd, &sd->s_children, s_sibling) {
+		ret = configfs_dump(child_sd, level + 2);
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+#endif
+
+
+/*
+ * configfs_depend_item() and configfs_undepend_item()
+ *
+ * WARNING: Do not call these from a configfs callback!
+ *
+ * This describes these functions and their helpers.
+ *
+ * Allow another kernel system to depend on a config_item.  If this
+ * happens, the item cannot go away until the dependant can live without
+ * it.  The idea is to give client modules as simple an interface as
+ * possible.  When a system asks them to depend on an item, they just
+ * call configfs_depend_item().  If the item is live and the client
+ * driver is in good shape, we'll happily do the work for them.
+ *
+ * Why is the locking complex?  Because configfs uses the VFS to handle
+ * all locking, but this function is called outside the normal
+ * VFS->configfs path.  So it must take VFS locks to prevent the
+ * VFS->configfs stuff (configfs_mkdir(), configfs_rmdir(), etc).  This is
+ * why you can't call these functions underneath configfs callbacks.
+ *
+ * Note, btw, that this can be called at *any* time, even when a configfs
+ * subsystem isn't registered, or when configfs is loading or unloading.
+ * Just like configfs_register_subsystem().  So we take the same
+ * precautions.  We pin the filesystem.  We lock each i_mutex _in_order_
+ * on our way down the tree.  If we can find the target item in the
+ * configfs tree, it must be part of the subsystem tree as well, so we
+ * do not need the subsystem semaphore.  Holding the i_mutex chain locks
+ * out mkdir() and rmdir(), who might be racing us.
+ */
+
+/*
+ * configfs_depend_prep()
+ *
+ * Only subdirectories count here.  Files (CONFIGFS_NOT_PINNED) are
+ * attributes.  This is similar but not the same to configfs_detach_prep().
+ * Note that configfs_detach_prep() expects the parent to be locked when it
+ * is called, but we lock the parent *inside* configfs_depend_prep().  We
+ * do that so we can unlock it if we find nothing.
+ *
+ * Here we do a depth-first search of the dentry hierarchy looking for
+ * our object.  We take i_mutex on each step of the way down.  IT IS
+ * ESSENTIAL THAT i_mutex LOCKING IS ORDERED.  If we come back up a branch,
+ * we'll drop the i_mutex.
+ *
+ * If the target is not found, -ENOENT is bubbled up and we have released
+ * all locks.  If the target was found, the locks will be cleared by
+ * configfs_depend_rollback().
+ *
+ * This adds a requirement that all config_items be unique!
+ *
+ * This is recursive because the locking traversal is tricky.  There isn't
+ * much on the stack, though, so folks that need this function - be careful
+ * about your stack!  Patches will be accepted to make it iterative.
+ */
+static int configfs_depend_prep(struct dentry *origin,
+				struct config_item *target)
+{
+	struct configfs_dirent *child_sd, *sd = origin->d_fsdata;
+	int ret = 0;
+
+	BUG_ON(!origin || !sd);
+
+	/* Lock this guy on the way down */
+	mutex_lock(&sd->s_dentry->d_inode->i_mutex);
+	if (sd->s_element == target)  /* Boo-yah */
+		goto out;
+
+	list_for_each_entry(child_sd, &sd->s_children, s_sibling) {
+		if (child_sd->s_type & CONFIGFS_DIR) {
+			ret = configfs_depend_prep(child_sd->s_dentry,
+						   target);
+			if (!ret)
+				goto out;  /* Child path boo-yah */
+		}
+	}
+
+	/* We looped all our children and didn't find target */
+	mutex_unlock(&sd->s_dentry->d_inode->i_mutex);
+	ret = -ENOENT;
+
+out:
+	return ret;
+}
+
+/*
+ * This is ONLY called if configfs_depend_prep() did its job.  So we can
+ * trust the entire path from item back up to origin.
+ *
+ * We walk backwards from item, unlocking each i_mutex.  We finish by
+ * unlocking origin.
+ */
+static void configfs_depend_rollback(struct dentry *origin,
+				     struct config_item *item)
+{
+	struct dentry *dentry = item->ci_dentry;
+
+	while (dentry != origin) {
+		mutex_unlock(&dentry->d_inode->i_mutex);
+		dentry = dentry->d_parent;
+	}
+
+	mutex_unlock(&origin->d_inode->i_mutex);
+}
+
+int configfs_depend_item(struct configfs_subsystem *subsys,
+			 struct config_item *target)
+{
+	int ret;
+	struct configfs_dirent *p, *root_sd, *subsys_sd = NULL;
+	struct config_item *s_item = &subsys->su_group.cg_item;
+
+	/*
+	 * Pin the configfs filesystem.  This means we can safely access
+	 * the root of the configfs filesystem.
+	 */
+	ret = configfs_pin_fs();
+	if (ret)
+		return ret;
+
+	/*
+	 * Next, lock the root directory.  We're going to check that the
+	 * subsystem is really registered, and so we need to lock out
+	 * configfs_[un]register_subsystem().
+	 */
+	mutex_lock(&configfs_sb->s_root->d_inode->i_mutex);
+
+	root_sd = configfs_sb->s_root->d_fsdata;
+
+	list_for_each_entry(p, &root_sd->s_children, s_sibling) {
+		if (p->s_type & CONFIGFS_DIR) {
+			if (p->s_element == s_item) {
+				subsys_sd = p;
+				break;
+			}
+		}
+	}
+
+	if (!subsys_sd) {
+		ret = -ENOENT;
+		goto out_unlock_fs;
+	}
+
+	/* Ok, now we can trust subsys/s_item */
+
+	/* Scan the tree, locking i_mutex recursively, return 0 if found */
+	ret = configfs_depend_prep(subsys_sd->s_dentry, target);
+	if (ret)
+		goto out_unlock_fs;
+
+	/* We hold all i_mutexes from the subsystem down to the target */
+	p = target->ci_dentry->d_fsdata;
+	p->s_dependent_count += 1;
+
+	configfs_depend_rollback(subsys_sd->s_dentry, target);
+
+out_unlock_fs:
+	mutex_unlock(&configfs_sb->s_root->d_inode->i_mutex);
+
+	/*
+	 * If we succeeded, the fs is pinned via other methods.  If not,
+	 * we're done with it anyway.  So release_fs() is always right.
+	 */
+	configfs_release_fs();
+
+	return ret;
+}
+EXPORT_SYMBOL(configfs_depend_item);
+
+/*
+ * Release the dependent linkage.  This is much simpler than
+ * configfs_depend_item() because we know that that the client driver is
+ * pinned, thus the subsystem is pinned, and therefore configfs is pinned.
+ */
+void configfs_undepend_item(struct configfs_subsystem *subsys,
+			    struct config_item *target)
+{
+	struct configfs_dirent *sd;
+
+	/*
+	 * Since we can trust everything is pinned, we just need i_mutex
+	 * on the item.
+	 */
+	mutex_lock(&target->ci_dentry->d_inode->i_mutex);
+
+	sd = target->ci_dentry->d_fsdata;
+	BUG_ON(sd->s_dependent_count < 1);
+
+	sd->s_dependent_count -= 1;
+
+	/*
+	 * After this unlock, we cannot trust the item to stay alive!
+	 * DO NOT REFERENCE item after this unlock.
+	 */
+	mutex_unlock(&target->ci_dentry->d_inode->i_mutex);
+}
+EXPORT_SYMBOL(configfs_undepend_item);
 
 static int configfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 {
@@ -783,7 +1042,7 @@ static int configfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 
 	snprintf(name, dentry->d_name.len + 1, "%s", dentry->d_name.name);
 
-	down(&subsys->su_sem);
+	mutex_lock(&subsys->su_mutex);
 	group = NULL;
 	item = NULL;
 	if (type->ct_group_ops->make_group) {
@@ -797,7 +1056,7 @@ static int configfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 		if (item)
 			link_obj(parent_item, item);
 	}
-	up(&subsys->su_sem);
+	mutex_unlock(&subsys->su_mutex);
 
 	kfree(name);
 	if (!item) {
@@ -841,13 +1100,16 @@ static int configfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 out_unlink:
 	if (ret) {
 		/* Tear down everything we built up */
-		down(&subsys->su_sem);
+		mutex_lock(&subsys->su_mutex);
+
+		client_disconnect_notify(parent_item, item);
 		if (group)
 			unlink_group(group);
 		else
 			unlink_obj(item);
 		client_drop_item(parent_item, item);
-		up(&subsys->su_sem);
+
+		mutex_unlock(&subsys->su_mutex);
 
 		if (module_got)
 			module_put(owner);
@@ -881,6 +1143,13 @@ static int configfs_rmdir(struct inode *dir, struct dentry *dentry)
 	if (sd->s_type & CONFIGFS_USET_DEFAULT)
 		return -EPERM;
 
+	/*
+	 * Here's where we check for dependents.  We're protected by
+	 * i_mutex.
+	 */
+	if (sd->s_dependent_count)
+		return -EBUSY;
+
 	/* Get a working ref until we have the child */
 	parent_item = configfs_get_config_item(dentry->d_parent);
 	subsys = to_config_group(parent_item)->cg_subsys;
@@ -910,17 +1179,19 @@ static int configfs_rmdir(struct inode *dir, struct dentry *dentry)
 	if (sd->s_type & CONFIGFS_USET_DIR) {
 		configfs_detach_group(item);
 
-		down(&subsys->su_sem);
+		mutex_lock(&subsys->su_mutex);
+		client_disconnect_notify(parent_item, item);
 		unlink_group(to_config_group(item));
 	} else {
 		configfs_detach_item(item);
 
-		down(&subsys->su_sem);
+		mutex_lock(&subsys->su_mutex);
+		client_disconnect_notify(parent_item, item);
 		unlink_obj(item);
 	}
 
 	client_drop_item(parent_item, item);
-	up(&subsys->su_sem);
+	mutex_unlock(&subsys->su_mutex);
 
 	/* Drop our reference from above */
 	config_item_put(item);
diff --git a/fs/configfs/file.c b/fs/configfs/file.c
index 3527c7c..a3658f9 100644
--- a/fs/configfs/file.c
+++ b/fs/configfs/file.c
@@ -27,19 +27,26 @@
 #include <linux/fs.h>
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/mutex.h>
 #include <asm/uaccess.h>
-#include <asm/semaphore.h>
 
 #include <linux/configfs.h>
 #include "configfs_internal.h"
 
+/*
+ * A simple attribute can only be 4096 characters.  Why 4k?  Because the
+ * original code limited it to PAGE_SIZE.  That's a bad idea, though,
+ * because an attribute of 16k on ia64 won't work on x86.  So we limit to
+ * 4k, our minimum common page size.
+ */
+#define SIMPLE_ATTR_SIZE 4096
 
 struct configfs_buffer {
 	size_t			count;
 	loff_t			pos;
 	char			* page;
 	struct configfs_item_operations	* ops;
-	struct semaphore	sem;
+	struct mutex		mutex;
 	int			needs_read_fill;
 };
 
@@ -69,7 +76,7 @@ static int fill_read_buffer(struct dentry * dentry, struct configfs_buffer * buf
 
 	count = ops->show_attribute(item,attr,buffer->page);
 	buffer->needs_read_fill = 0;
-	BUG_ON(count > (ssize_t)PAGE_SIZE);
+	BUG_ON(count > (ssize_t)SIMPLE_ATTR_SIZE);
 	if (count >= 0)
 		buffer->count = count;
 	else
@@ -102,7 +109,7 @@ configfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *pp
 	struct configfs_buffer * buffer = file->private_data;
 	ssize_t retval = 0;
 
-	down(&buffer->sem);
+	mutex_lock(&buffer->mutex);
 	if (buffer->needs_read_fill) {
 		if ((retval = fill_read_buffer(file->f_path.dentry,buffer)))
 			goto out;
@@ -112,7 +119,7 @@ configfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *pp
 	retval = simple_read_from_buffer(buf, count, ppos, buffer->page,
 					 buffer->count);
 out:
-	up(&buffer->sem);
+	mutex_unlock(&buffer->mutex);
 	return retval;
 }
 
@@ -137,8 +144,8 @@ fill_write_buffer(struct configfs_buffer * buffer, const char __user * buf, size
 	if (!buffer->page)
 		return -ENOMEM;
 
-	if (count >= PAGE_SIZE)
-		count = PAGE_SIZE - 1;
+	if (count >= SIMPLE_ATTR_SIZE)
+		count = SIMPLE_ATTR_SIZE - 1;
 	error = copy_from_user(buffer->page,buf,count);
 	buffer->needs_read_fill = 1;
 	/* if buf is assumed to contain a string, terminate it by \0,
@@ -193,13 +200,13 @@ configfs_write_file(struct file *file, const char __user *buf, size_t count, lof
 	struct configfs_buffer * buffer = file->private_data;
 	ssize_t len;
 
-	down(&buffer->sem);
+	mutex_lock(&buffer->mutex);
 	len = fill_write_buffer(buffer, buf, count);
 	if (len > 0)
 		len = flush_write_buffer(file->f_path.dentry, buffer, count);
 	if (len > 0)
 		*ppos += len;
-	up(&buffer->sem);
+	mutex_unlock(&buffer->mutex);
 	return len;
 }
 
@@ -253,7 +260,7 @@ static int check_perm(struct inode * inode, struct file * file)
 		error = -ENOMEM;
 		goto Enomem;
 	}
-	init_MUTEX(&buffer->sem);
+	mutex_init(&buffer->mutex);
 	buffer->needs_read_fill = 1;
 	buffer->ops = ops;
 	file->private_data = buffer;
@@ -292,6 +299,7 @@ static int configfs_release(struct inode * inode, struct file * filp)
 	if (buffer) {
 		if (buffer->page)
 			free_page((unsigned long)buffer->page);
+		mutex_destroy(&buffer->mutex);
 		kfree(buffer);
 	}
 	return 0;
diff --git a/fs/configfs/item.c b/fs/configfs/item.c
index 2442120..76dc4c3 100644
--- a/fs/configfs/item.c
+++ b/fs/configfs/item.c
@@ -62,7 +62,6 @@ void config_item_init(struct config_item * item)
  *	dynamically allocated string that @item->ci_name points to.
  *	Otherwise, use the static @item->ci_namebuf array.
  */
-
 int config_item_set_name(struct config_item * item, const char * fmt, ...)
 {
 	int error = 0;
@@ -139,12 +138,7 @@ struct config_item * config_item_get(struct config_item * item)
 	return item;
 }
 
-/**
- *	config_item_cleanup - free config_item resources.
- *	@item:	item.
- */
-
-void config_item_cleanup(struct config_item * item)
+static void config_item_cleanup(struct config_item * item)
 {
 	struct config_item_type * t = item->ci_type;
 	struct config_group * s = item->ci_group;
@@ -179,39 +173,35 @@ void config_item_put(struct config_item * item)
 		kref_put(&item->ci_kref, config_item_release);
 }
 
-
 /**
  *	config_group_init - initialize a group for use
  *	@k:	group
  */
-
 void config_group_init(struct config_group *group)
 {
 	config_item_init(&group->cg_item);
 	INIT_LIST_HEAD(&group->cg_children);
 }
 
-
 /**
- *	config_group_find_obj - search for item in group.
+ *	config_group_find_item - search for item in group.
  *	@group:	group we're looking in.
  *	@name:	item's name.
  *
- *	Lock group via @group->cg_subsys, and iterate over @group->cg_list,
- *	looking for a matching config_item. If matching item is found
- *	take a reference and return the item.
+ *	Iterate over @group->cg_list, looking for a matching config_item.
+ *	If matching item is found take a reference and return the item.
+ *	Caller must have locked group via @group->cg_subsys->su_mtx.
  */
-
-struct config_item * config_group_find_obj(struct config_group * group, const char * name)
+struct config_item *config_group_find_item(struct config_group *group,
+					   const char *name)
 {
 	struct list_head * entry;
 	struct config_item * ret = NULL;
 
-        /* XXX LOCKING! */
 	list_for_each(entry,&group->cg_children) {
 		struct config_item * item = to_item(entry);
 		if (config_item_name(item) &&
-                    !strcmp(config_item_name(item), name)) {
+		    !strcmp(config_item_name(item), name)) {
 			ret = config_item_get(item);
 			break;
 		}
@@ -219,9 +209,8 @@ struct config_item * config_group_find_obj(struct config_group * group, const ch
 	return ret;
 }
 
-
 EXPORT_SYMBOL(config_item_init);
 EXPORT_SYMBOL(config_group_init);
 EXPORT_SYMBOL(config_item_get);
 EXPORT_SYMBOL(config_item_put);
-EXPORT_SYMBOL(config_group_find_obj);
+EXPORT_SYMBOL(config_group_find_item);
diff --git a/fs/dcache.c b/fs/dcache.c
index 0e73aa0..cb9d050 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -883,6 +883,11 @@ static int shrink_dcache_memory(int nr, gfp_t gfp_mask)
 	return (dentry_stat.nr_unused / 100) * sysctl_vfs_cache_pressure;
 }
 
+static struct shrinker dcache_shrinker = {
+	.shrink = shrink_dcache_memory,
+	.seeks = DEFAULT_SEEKS,
+};
+
 /**
  * d_alloc	-	allocate a dcache entry
  * @parent: parent of entry to allocate
@@ -2115,7 +2120,7 @@ static void __init dcache_init(unsigned long mempages)
 	dentry_cache = KMEM_CACHE(dentry,
 		SLAB_RECLAIM_ACCOUNT|SLAB_PANIC|SLAB_MEM_SPREAD);
 	
-	set_shrinker(DEFAULT_SEEKS, shrink_dcache_memory);
+	register_shrinker(&dcache_shrinker);
 
 	/* Hash may have been set up in dcache_init_early */
 	if (!hashdist)
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index ec8896b..1d533a2 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -368,6 +368,69 @@ void debugfs_remove(struct dentry *dentry)
 }
 EXPORT_SYMBOL_GPL(debugfs_remove);
 
+/**
+ * debugfs_rename - rename a file/directory in the debugfs filesystem
+ * @old_dir: a pointer to the parent dentry for the renamed object. This
+ *          should be a directory dentry.
+ * @old_dentry: dentry of an object to be renamed.
+ * @new_dir: a pointer to the parent dentry where the object should be
+ *          moved. This should be a directory dentry.
+ * @new_name: a pointer to a string containing the target name.
+ *
+ * This function renames a file/directory in debugfs.  The target must not
+ * exist for rename to succeed.
+ *
+ * This function will return a pointer to old_dentry (which is updated to
+ * reflect renaming) if it succeeds. If an error occurs, %NULL will be
+ * returned.
+ *
+ * If debugfs is not enabled in the kernel, the value -%ENODEV will be
+ * returned.
+ */
+struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
+		struct dentry *new_dir, const char *new_name)
+{
+	int error;
+	struct dentry *dentry = NULL, *trap;
+	const char *old_name;
+
+	trap = lock_rename(new_dir, old_dir);
+	/* Source or destination directories don't exist? */
+	if (!old_dir->d_inode || !new_dir->d_inode)
+		goto exit;
+	/* Source does not exist, cyclic rename, or mountpoint? */
+	if (!old_dentry->d_inode || old_dentry == trap ||
+	    d_mountpoint(old_dentry))
+		goto exit;
+	dentry = lookup_one_len(new_name, new_dir, strlen(new_name));
+	/* Lookup failed, cyclic rename or target exists? */
+	if (IS_ERR(dentry) || dentry == trap || dentry->d_inode)
+		goto exit;
+
+	old_name = fsnotify_oldname_init(old_dentry->d_name.name);
+
+	error = simple_rename(old_dir->d_inode, old_dentry, new_dir->d_inode,
+		dentry);
+	if (error) {
+		fsnotify_oldname_free(old_name);
+		goto exit;
+	}
+	d_move(old_dentry, dentry);
+	fsnotify_move(old_dir->d_inode, new_dir->d_inode, old_name,
+		old_dentry->d_name.name, S_ISDIR(old_dentry->d_inode->i_mode),
+		NULL, old_dentry->d_inode);
+	fsnotify_oldname_free(old_name);
+	unlock_rename(new_dir, old_dir);
+	dput(dentry);
+	return old_dentry;
+exit:
+	if (dentry && !IS_ERR(dentry))
+		dput(dentry);
+	unlock_rename(new_dir, old_dir);
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(debugfs_rename);
+
 static decl_subsys(debug, NULL, NULL);
 
 static int __init debugfs_init(void)
diff --git a/fs/direct-io.c b/fs/direct-io.c
index 8593f3d..52bb263 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1106,7 +1106,7 @@ direct_io_worker(int rw, struct kiocb *iocb, struct inode *inode,
 	spin_lock_irqsave(&dio->bio_lock, flags);
 	ret2 = --dio->refcount;
 	spin_unlock_irqrestore(&dio->bio_lock, flags);
-	BUG_ON(!dio->is_async && ret2 != 0);
+
 	if (ret2 == 0) {
 		ret = dio_complete(dio, offset, ret);
 		kfree(dio);
diff --git a/fs/dlm/Kconfig b/fs/dlm/Kconfig
index 69a9469..54bcc00 100644
--- a/fs/dlm/Kconfig
+++ b/fs/dlm/Kconfig
@@ -3,7 +3,7 @@ menu "Distributed Lock Manager"
 
 config DLM
 	tristate "Distributed Lock Manager (DLM)"
-	depends on IPV6 || IPV6=n
+	depends on SYSFS && (IPV6 || IPV6=n)
 	select CONFIGFS_FS
 	select IP_SCTP
 	help
diff --git a/fs/dlm/Makefile b/fs/dlm/Makefile
index 604cf7d..d248e60 100644
--- a/fs/dlm/Makefile
+++ b/fs/dlm/Makefile
@@ -8,6 +8,7 @@ dlm-y :=			ast.o \
 				member.o \
 				memory.o \
 				midcomms.o \
+				netlink.o \
 				lowcomms.o \
 				rcom.o \
 				recover.o \
diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index 822abdc..2f8e3c8 100644
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -90,6 +90,7 @@ struct cluster {
 	unsigned int cl_scan_secs;
 	unsigned int cl_log_debug;
 	unsigned int cl_protocol;
+	unsigned int cl_timewarn_cs;
 };
 
 enum {
@@ -103,6 +104,7 @@ enum {
 	CLUSTER_ATTR_SCAN_SECS,
 	CLUSTER_ATTR_LOG_DEBUG,
 	CLUSTER_ATTR_PROTOCOL,
+	CLUSTER_ATTR_TIMEWARN_CS,
 };
 
 struct cluster_attribute {
@@ -131,14 +133,6 @@ static ssize_t cluster_set(struct cluster *cl, unsigned int *cl_field,
 	return len;
 }
 
-#define __CONFIGFS_ATTR(_name,_mode,_read,_write) {                           \
-	.attr   = { .ca_name = __stringify(_name),                            \
-		    .ca_mode = _mode,                                         \
-		    .ca_owner = THIS_MODULE },                                \
-	.show   = _read,                                                      \
-	.store  = _write,                                                     \
-}
-
 #define CLUSTER_ATTR(name, check_zero)                                        \
 static ssize_t name##_write(struct cluster *cl, const char *buf, size_t len)  \
 {                                                                             \
@@ -162,6 +156,7 @@ CLUSTER_ATTR(toss_secs, 1);
 CLUSTER_ATTR(scan_secs, 1);
 CLUSTER_ATTR(log_debug, 0);
 CLUSTER_ATTR(protocol, 0);
+CLUSTER_ATTR(timewarn_cs, 1);
 
 static struct configfs_attribute *cluster_attrs[] = {
 	[CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port.attr,
@@ -174,6 +169,7 @@ static struct configfs_attribute *cluster_attrs[] = {
 	[CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs.attr,
 	[CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug.attr,
 	[CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol.attr,
+	[CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs.attr,
 	NULL,
 };
 
@@ -429,6 +425,8 @@ static struct config_group *make_cluster(struct config_group *g,
 	cl->cl_toss_secs = dlm_config.ci_toss_secs;
 	cl->cl_scan_secs = dlm_config.ci_scan_secs;
 	cl->cl_log_debug = dlm_config.ci_log_debug;
+	cl->cl_protocol = dlm_config.ci_protocol;
+	cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs;
 
 	space_list = &sps->ss_group;
 	comm_list = &cms->cs_group;
@@ -609,7 +607,7 @@ static struct clusters clusters_root = {
 int dlm_config_init(void)
 {
 	config_group_init(&clusters_root.subsys.su_group);
-	init_MUTEX(&clusters_root.subsys.su_sem);
+	mutex_init(&clusters_root.subsys.su_mutex);
 	return configfs_register_subsystem(&clusters_root.subsys);
 }
 
@@ -748,9 +746,16 @@ static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len)
 
 static struct space *get_space(char *name)
 {
+	struct config_item *i;
+
 	if (!space_list)
 		return NULL;
-	return to_space(config_group_find_obj(space_list, name));
+
+	mutex_lock(&space_list->cg_subsys->su_mutex);
+	i = config_group_find_item(space_list, name);
+	mutex_unlock(&space_list->cg_subsys->su_mutex);
+
+	return to_space(i);
 }
 
 static void put_space(struct space *sp)
@@ -767,7 +772,7 @@ static struct comm *get_comm(int nodeid, struct sockaddr_storage *addr)
 	if (!comm_list)
 		return NULL;
 
-	down(&clusters_root.subsys.su_sem);
+	mutex_lock(&clusters_root.subsys.su_mutex);
 
 	list_for_each_entry(i, &comm_list->cg_children, ci_entry) {
 		cm = to_comm(i);
@@ -776,20 +781,20 @@ static struct comm *get_comm(int nodeid, struct sockaddr_storage *addr)
 			if (cm->nodeid != nodeid)
 				continue;
 			found = 1;
+			config_item_get(i);
 			break;
 		} else {
 			if (!cm->addr_count ||
 			    memcmp(cm->addr[0], addr, sizeof(*addr)))
 				continue;
 			found = 1;
+			config_item_get(i);
 			break;
 		}
 	}
-	up(&clusters_root.subsys.su_sem);
+	mutex_unlock(&clusters_root.subsys.su_mutex);
 
-	if (found)
-		config_item_get(i);
-	else
+	if (!found)
 		cm = NULL;
 	return cm;
 }
@@ -909,6 +914,7 @@ int dlm_our_addr(struct sockaddr_storage *addr, int num)
 #define DEFAULT_SCAN_SECS          5
 #define DEFAULT_LOG_DEBUG          0
 #define DEFAULT_PROTOCOL           0
+#define DEFAULT_TIMEWARN_CS      500 /* 5 sec = 500 centiseconds */
 
 struct dlm_config_info dlm_config = {
 	.ci_tcp_port = DEFAULT_TCP_PORT,
@@ -920,6 +926,7 @@ struct dlm_config_info dlm_config = {
 	.ci_toss_secs = DEFAULT_TOSS_SECS,
 	.ci_scan_secs = DEFAULT_SCAN_SECS,
 	.ci_log_debug = DEFAULT_LOG_DEBUG,
-	.ci_protocol = DEFAULT_PROTOCOL
+	.ci_protocol = DEFAULT_PROTOCOL,
+	.ci_timewarn_cs = DEFAULT_TIMEWARN_CS
 };
 
diff --git a/fs/dlm/config.h b/fs/dlm/config.h
index 967cc3d..a3170fe 100644
--- a/fs/dlm/config.h
+++ b/fs/dlm/config.h
@@ -27,6 +27,7 @@ struct dlm_config_info {
 	int ci_scan_secs;
 	int ci_log_debug;
 	int ci_protocol;
+	int ci_timewarn_cs;
 };
 
 extern struct dlm_config_info dlm_config;
diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c
index 61ba670..12c3bfd 100644
--- a/fs/dlm/debug_fs.c
+++ b/fs/dlm/debug_fs.c
@@ -17,6 +17,7 @@
 #include <linux/debugfs.h>
 
 #include "dlm_internal.h"
+#include "lock.h"
 
 #define DLM_DEBUG_BUF_LEN 4096
 static char debug_buf[DLM_DEBUG_BUF_LEN];
@@ -26,6 +27,8 @@ static struct dentry *dlm_root;
 
 struct rsb_iter {
 	int entry;
+	int locks;
+	int header;
 	struct dlm_ls *ls;
 	struct list_head *next;
 	struct dlm_rsb *rsb;
@@ -57,8 +60,8 @@ static char *print_lockmode(int mode)
 	}
 }
 
-static void print_lock(struct seq_file *s, struct dlm_lkb *lkb,
-		       struct dlm_rsb *res)
+static void print_resource_lock(struct seq_file *s, struct dlm_lkb *lkb,
+				struct dlm_rsb *res)
 {
 	seq_printf(s, "%08x %s", lkb->lkb_id, print_lockmode(lkb->lkb_grmode));
 
@@ -85,6 +88,8 @@ static int print_resource(struct dlm_rsb *res, struct seq_file *s)
 	struct dlm_lkb *lkb;
 	int i, lvblen = res->res_ls->ls_lvblen, recover_list, root_list;
 
+	lock_rsb(res);
+
 	seq_printf(s, "\nResource %p Name (len=%d) \"", res, res->res_length);
 	for (i = 0; i < res->res_length; i++) {
 		if (isprint(res->res_name[i]))
@@ -129,15 +134,15 @@ static int print_resource(struct dlm_rsb *res, struct seq_file *s)
 	/* Print the locks attached to this resource */
 	seq_printf(s, "Granted Queue\n");
 	list_for_each_entry(lkb, &res->res_grantqueue, lkb_statequeue)
-		print_lock(s, lkb, res);
+		print_resource_lock(s, lkb, res);
 
 	seq_printf(s, "Conversion Queue\n");
 	list_for_each_entry(lkb, &res->res_convertqueue, lkb_statequeue)
-		print_lock(s, lkb, res);
+		print_resource_lock(s, lkb, res);
 
 	seq_printf(s, "Waiting Queue\n");
 	list_for_each_entry(lkb, &res->res_waitqueue, lkb_statequeue)
-		print_lock(s, lkb, res);
+		print_resource_lock(s, lkb, res);
 
 	if (list_empty(&res->res_lookup))
 		goto out;
@@ -151,6 +156,61 @@ static int print_resource(struct dlm_rsb *res, struct seq_file *s)
 		seq_printf(s, "\n");
 	}
  out:
+	unlock_rsb(res);
+	return 0;
+}
+
+static void print_lock(struct seq_file *s, struct dlm_lkb *lkb, struct dlm_rsb *r)
+{
+	struct dlm_user_args *ua;
+	unsigned int waiting = 0;
+	uint64_t xid = 0;
+
+	if (lkb->lkb_flags & DLM_IFL_USER) {
+		ua = (struct dlm_user_args *) lkb->lkb_astparam;
+		if (ua)
+			xid = ua->xid;
+	}
+
+	if (lkb->lkb_timestamp)
+		waiting = jiffies_to_msecs(jiffies - lkb->lkb_timestamp);
+
+	/* id nodeid remid pid xid exflags flags sts grmode rqmode time_ms
+	   r_nodeid r_len r_name */
+
+	seq_printf(s, "%x %d %x %u %llu %x %x %d %d %d %u %u %d \"%s\"\n",
+		   lkb->lkb_id,
+		   lkb->lkb_nodeid,
+		   lkb->lkb_remid,
+		   lkb->lkb_ownpid,
+		   (unsigned long long)xid,
+		   lkb->lkb_exflags,
+		   lkb->lkb_flags,
+		   lkb->lkb_status,
+		   lkb->lkb_grmode,
+		   lkb->lkb_rqmode,
+		   waiting,
+		   r->res_nodeid,
+		   r->res_length,
+		   r->res_name);
+}
+
+static int print_locks(struct dlm_rsb *r, struct seq_file *s)
+{
+	struct dlm_lkb *lkb;
+
+	lock_rsb(r);
+
+	list_for_each_entry(lkb, &r->res_grantqueue, lkb_statequeue)
+		print_lock(s, lkb, r);
+
+	list_for_each_entry(lkb, &r->res_convertqueue, lkb_statequeue)
+		print_lock(s, lkb, r);
+
+	list_for_each_entry(lkb, &r->res_waitqueue, lkb_statequeue)
+		print_lock(s, lkb, r);
+
+	unlock_rsb(r);
 	return 0;
 }
 
@@ -166,6 +226,9 @@ static int rsb_iter_next(struct rsb_iter *ri)
 			read_lock(&ls->ls_rsbtbl[i].lock);
 			if (!list_empty(&ls->ls_rsbtbl[i].list)) {
 				ri->next = ls->ls_rsbtbl[i].list.next;
+				ri->rsb = list_entry(ri->next, struct dlm_rsb,
+							res_hashchain);
+				dlm_hold_rsb(ri->rsb);
 				read_unlock(&ls->ls_rsbtbl[i].lock);
 				break;
 			}
@@ -176,6 +239,7 @@ static int rsb_iter_next(struct rsb_iter *ri)
 		if (ri->entry >= ls->ls_rsbtbl_size)
 			return 1;
 	} else {
+		struct dlm_rsb *old = ri->rsb;
 		i = ri->entry;
 		read_lock(&ls->ls_rsbtbl[i].lock);
 		ri->next = ri->next->next;
@@ -184,11 +248,14 @@ static int rsb_iter_next(struct rsb_iter *ri)
 			ri->next = NULL;
 			ri->entry++;
 			read_unlock(&ls->ls_rsbtbl[i].lock);
+			dlm_put_rsb(old);
 			goto top;
                 }
+		ri->rsb = list_entry(ri->next, struct dlm_rsb, res_hashchain);
+		dlm_hold_rsb(ri->rsb);
 		read_unlock(&ls->ls_rsbtbl[i].lock);
+		dlm_put_rsb(old);
 	}
-	ri->rsb = list_entry(ri->next, struct dlm_rsb, res_hashchain);
 
 	return 0;
 }
@@ -202,7 +269,7 @@ static struct rsb_iter *rsb_iter_init(struct dlm_ls *ls)
 {
 	struct rsb_iter *ri;
 
-	ri = kmalloc(sizeof *ri, GFP_KERNEL);
+	ri = kzalloc(sizeof *ri, GFP_KERNEL);
 	if (!ri)
 		return NULL;
 
@@ -260,7 +327,17 @@ static int rsb_seq_show(struct seq_file *file, void *iter_ptr)
 {
 	struct rsb_iter *ri = iter_ptr;
 
-	print_resource(ri->rsb, file);
+	if (ri->locks) {
+		if (ri->header) {
+			seq_printf(file, "id nodeid remid pid xid exflags flags "
+					 "sts grmode rqmode time_ms r_nodeid "
+					 "r_len r_name\n");
+			ri->header = 0;
+		}
+		print_locks(ri->rsb, file);
+	} else {
+		print_resource(ri->rsb, file);
+	}
 
 	return 0;
 }
@@ -296,6 +373,83 @@ static const struct file_operations rsb_fops = {
 };
 
 /*
+ * Dump state in compact per-lock listing
+ */
+
+static struct rsb_iter *locks_iter_init(struct dlm_ls *ls, loff_t *pos)
+{
+	struct rsb_iter *ri;
+
+	ri = kzalloc(sizeof *ri, GFP_KERNEL);
+	if (!ri)
+		return NULL;
+
+	ri->ls = ls;
+	ri->entry = 0;
+	ri->next = NULL;
+	ri->locks = 1;
+
+	if (*pos == 0)
+		ri->header = 1;
+
+	if (rsb_iter_next(ri)) {
+		rsb_iter_free(ri);
+		return NULL;
+	}
+
+	return ri;
+}
+
+static void *locks_seq_start(struct seq_file *file, loff_t *pos)
+{
+	struct rsb_iter *ri;
+	loff_t n = *pos;
+
+	ri = locks_iter_init(file->private, pos);
+	if (!ri)
+		return NULL;
+
+	while (n--) {
+		if (rsb_iter_next(ri)) {
+			rsb_iter_free(ri);
+			return NULL;
+		}
+	}
+
+	return ri;
+}
+
+static struct seq_operations locks_seq_ops = {
+	.start = locks_seq_start,
+	.next  = rsb_seq_next,
+	.stop  = rsb_seq_stop,
+	.show  = rsb_seq_show,
+};
+
+static int locks_open(struct inode *inode, struct file *file)
+{
+	struct seq_file *seq;
+	int ret;
+
+	ret = seq_open(file, &locks_seq_ops);
+	if (ret)
+		return ret;
+
+	seq = file->private_data;
+	seq->private = inode->i_private;
+
+	return 0;
+}
+
+static const struct file_operations locks_fops = {
+	.owner   = THIS_MODULE,
+	.open    = locks_open,
+	.read    = seq_read,
+	.llseek  = seq_lseek,
+	.release = seq_release
+};
+
+/*
  * dump lkb's on the ls_waiters list
  */
 
@@ -362,6 +516,20 @@ int dlm_create_debug_file(struct dlm_ls *ls)
 		return -ENOMEM;
 	}
 
+	memset(name, 0, sizeof(name));
+	snprintf(name, DLM_LOCKSPACE_LEN+8, "%s_locks", ls->ls_name);
+
+	ls->ls_debug_locks_dentry = debugfs_create_file(name,
+							S_IFREG | S_IRUGO,
+							dlm_root,
+							ls,
+							&locks_fops);
+	if (!ls->ls_debug_locks_dentry) {
+		debugfs_remove(ls->ls_debug_waiters_dentry);
+		debugfs_remove(ls->ls_debug_rsb_dentry);
+		return -ENOMEM;
+	}
+
 	return 0;
 }
 
@@ -371,6 +539,8 @@ void dlm_delete_debug_file(struct dlm_ls *ls)
 		debugfs_remove(ls->ls_debug_rsb_dentry);
 	if (ls->ls_debug_waiters_dentry)
 		debugfs_remove(ls->ls_debug_waiters_dentry);
+	if (ls->ls_debug_locks_dentry)
+		debugfs_remove(ls->ls_debug_locks_dentry);
 }
 
 int dlm_register_debugfs(void)
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index 30994d6..74901e9 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -151,6 +151,7 @@ struct dlm_args {
 	void			*bastaddr;
 	int			mode;
 	struct dlm_lksb		*lksb;
+	unsigned long		timeout;
 };
 
 
@@ -213,6 +214,9 @@ struct dlm_args {
 #define DLM_IFL_OVERLAP_UNLOCK  0x00080000
 #define DLM_IFL_OVERLAP_CANCEL  0x00100000
 #define DLM_IFL_ENDOFLIFE	0x00200000
+#define DLM_IFL_WATCH_TIMEWARN	0x00400000
+#define DLM_IFL_TIMEOUT_CANCEL	0x00800000
+#define DLM_IFL_DEADLOCK_CANCEL	0x01000000
 #define DLM_IFL_USER		0x00000001
 #define DLM_IFL_ORPHAN		0x00000002
 
@@ -243,6 +247,9 @@ struct dlm_lkb {
 	struct list_head	lkb_wait_reply;	/* waiting for remote reply */
 	struct list_head	lkb_astqueue;	/* need ast to be sent */
 	struct list_head	lkb_ownqueue;	/* list of locks for a process */
+	struct list_head	lkb_time_list;
+	unsigned long		lkb_timestamp;
+	unsigned long		lkb_timeout_cs;
 
 	char			*lkb_lvbptr;
 	struct dlm_lksb		*lkb_lksb;      /* caller's status block */
@@ -447,12 +454,16 @@ struct dlm_ls {
 	struct mutex		ls_orphans_mutex;
 	struct list_head	ls_orphans;
 
+	struct mutex		ls_timeout_mutex;
+	struct list_head	ls_timeout;
+
 	struct list_head	ls_nodes;	/* current nodes in ls */
 	struct list_head	ls_nodes_gone;	/* dead node list, recovery */
 	int			ls_num_nodes;	/* number of nodes in ls */
 	int			ls_low_nodeid;
 	int			ls_total_weight;
 	int			*ls_node_array;
+	gfp_t			ls_allocation;
 
 	struct dlm_rsb		ls_stub_rsb;	/* for returning errors */
 	struct dlm_lkb		ls_stub_lkb;	/* for returning errors */
@@ -460,9 +471,12 @@ struct dlm_ls {
 
 	struct dentry		*ls_debug_rsb_dentry; /* debugfs */
 	struct dentry		*ls_debug_waiters_dentry; /* debugfs */
+	struct dentry		*ls_debug_locks_dentry; /* debugfs */
 
 	wait_queue_head_t	ls_uevent_wait;	/* user part of join/leave */
 	int			ls_uevent_result;
+	struct completion	ls_members_done;
+	int			ls_members_result;
 
 	struct miscdevice       ls_device;
 
@@ -472,6 +486,7 @@ struct dlm_ls {
 	struct task_struct	*ls_recoverd_task;
 	struct mutex		ls_recoverd_active;
 	spinlock_t		ls_recover_lock;
+	unsigned long		ls_recover_begin; /* jiffies timestamp */
 	uint32_t		ls_recover_status; /* DLM_RS_ */
 	uint64_t		ls_recover_seq;
 	struct dlm_recover	*ls_recover_args;
@@ -501,6 +516,7 @@ struct dlm_ls {
 #define LSFL_RCOM_READY		3
 #define LSFL_RCOM_WAIT		4
 #define LSFL_UEVENT_WAIT	5
+#define LSFL_TIMEWARN		6
 
 /* much of this is just saving user space pointers associated with the
    lock that we pass back to the user lib with an ast */
@@ -518,6 +534,7 @@ struct dlm_user_args {
 	void __user		*castaddr;
 	void __user		*bastparam;
 	void __user		*bastaddr;
+	uint64_t		xid;
 };
 
 #define DLM_PROC_FLAGS_CLOSING 1
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index d8d6e72..b455919 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -82,10 +82,13 @@ static int send_bast(struct dlm_rsb *r, struct dlm_lkb *lkb, int mode);
 static int send_lookup(struct dlm_rsb *r, struct dlm_lkb *lkb);
 static int send_remove(struct dlm_rsb *r);
 static int _request_lock(struct dlm_rsb *r, struct dlm_lkb *lkb);
+static int _cancel_lock(struct dlm_rsb *r, struct dlm_lkb *lkb);
 static void __receive_convert_reply(struct dlm_rsb *r, struct dlm_lkb *lkb,
 				    struct dlm_message *ms);
 static int receive_extralen(struct dlm_message *ms);
 static void do_purge(struct dlm_ls *ls, int nodeid, int pid);
+static void del_timeout(struct dlm_lkb *lkb);
+void dlm_timeout_warn(struct dlm_lkb *lkb);
 
 /*
  * Lock compatibilty matrix - thanks Steve
@@ -194,17 +197,17 @@ void dlm_dump_rsb(struct dlm_rsb *r)
 
 /* Threads cannot use the lockspace while it's being recovered */
 
-static inline void lock_recovery(struct dlm_ls *ls)
+static inline void dlm_lock_recovery(struct dlm_ls *ls)
 {
 	down_read(&ls->ls_in_recovery);
 }
 
-static inline void unlock_recovery(struct dlm_ls *ls)
+void dlm_unlock_recovery(struct dlm_ls *ls)
 {
 	up_read(&ls->ls_in_recovery);
 }
 
-static inline int lock_recovery_try(struct dlm_ls *ls)
+int dlm_lock_recovery_try(struct dlm_ls *ls)
 {
 	return down_read_trylock(&ls->ls_in_recovery);
 }
@@ -286,8 +289,22 @@ static void queue_cast(struct dlm_rsb *r, struct dlm_lkb *lkb, int rv)
 	if (is_master_copy(lkb))
 		return;
 
+	del_timeout(lkb);
+
 	DLM_ASSERT(lkb->lkb_lksb, dlm_print_lkb(lkb););
 
+	/* if the operation was a cancel, then return -DLM_ECANCEL, if a
+	   timeout caused the cancel then return -ETIMEDOUT */
+	if (rv == -DLM_ECANCEL && (lkb->lkb_flags & DLM_IFL_TIMEOUT_CANCEL)) {
+		lkb->lkb_flags &= ~DLM_IFL_TIMEOUT_CANCEL;
+		rv = -ETIMEDOUT;
+	}
+
+	if (rv == -DLM_ECANCEL && (lkb->lkb_flags & DLM_IFL_DEADLOCK_CANCEL)) {
+		lkb->lkb_flags &= ~DLM_IFL_DEADLOCK_CANCEL;
+		rv = -EDEADLK;
+	}
+
 	lkb->lkb_lksb->sb_status = rv;
 	lkb->lkb_lksb->sb_flags = lkb->lkb_sbflags;
 
@@ -581,6 +598,7 @@ static int create_lkb(struct dlm_ls *ls, struct dlm_lkb **lkb_ret)
 	kref_init(&lkb->lkb_ref);
 	INIT_LIST_HEAD(&lkb->lkb_ownqueue);
 	INIT_LIST_HEAD(&lkb->lkb_rsb_lookup);
+	INIT_LIST_HEAD(&lkb->lkb_time_list);
 
 	get_random_bytes(&bucket, sizeof(bucket));
 	bucket &= (ls->ls_lkbtbl_size - 1);
@@ -985,15 +1003,136 @@ void dlm_scan_rsbs(struct dlm_ls *ls)
 {
 	int i;
 
-	if (dlm_locking_stopped(ls))
-		return;
-
 	for (i = 0; i < ls->ls_rsbtbl_size; i++) {
 		shrink_bucket(ls, i);
+		if (dlm_locking_stopped(ls))
+			break;
 		cond_resched();
 	}
 }
 
+static void add_timeout(struct dlm_lkb *lkb)
+{
+	struct dlm_ls *ls = lkb->lkb_resource->res_ls;
+
+	if (is_master_copy(lkb)) {
+		lkb->lkb_timestamp = jiffies;
+		return;
+	}
+
+	if (test_bit(LSFL_TIMEWARN, &ls->ls_flags) &&
+	    !(lkb->lkb_exflags & DLM_LKF_NODLCKWT)) {
+		lkb->lkb_flags |= DLM_IFL_WATCH_TIMEWARN;
+		goto add_it;
+	}
+	if (lkb->lkb_exflags & DLM_LKF_TIMEOUT)
+		goto add_it;
+	return;
+
+ add_it:
+	DLM_ASSERT(list_empty(&lkb->lkb_time_list), dlm_print_lkb(lkb););
+	mutex_lock(&ls->ls_timeout_mutex);
+	hold_lkb(lkb);
+	lkb->lkb_timestamp = jiffies;
+	list_add_tail(&lkb->lkb_time_list, &ls->ls_timeout);
+	mutex_unlock(&ls->ls_timeout_mutex);
+}
+
+static void del_timeout(struct dlm_lkb *lkb)
+{
+	struct dlm_ls *ls = lkb->lkb_resource->res_ls;
+
+	mutex_lock(&ls->ls_timeout_mutex);
+	if (!list_empty(&lkb->lkb_time_list)) {
+		list_del_init(&lkb->lkb_time_list);
+		unhold_lkb(lkb);
+	}
+	mutex_unlock(&ls->ls_timeout_mutex);
+}
+
+/* FIXME: is it safe to look at lkb_exflags, lkb_flags, lkb_timestamp, and
+   lkb_lksb_timeout without lock_rsb?  Note: we can't lock timeout_mutex
+   and then lock rsb because of lock ordering in add_timeout.  We may need
+   to specify some special timeout-related bits in the lkb that are just to
+   be accessed under the timeout_mutex. */
+
+void dlm_scan_timeout(struct dlm_ls *ls)
+{
+	struct dlm_rsb *r;
+	struct dlm_lkb *lkb;
+	int do_cancel, do_warn;
+
+	for (;;) {
+		if (dlm_locking_stopped(ls))
+			break;
+
+		do_cancel = 0;
+		do_warn = 0;
+		mutex_lock(&ls->ls_timeout_mutex);
+		list_for_each_entry(lkb, &ls->ls_timeout, lkb_time_list) {
+
+			if ((lkb->lkb_exflags & DLM_LKF_TIMEOUT) &&
+			    time_after_eq(jiffies, lkb->lkb_timestamp +
+					  lkb->lkb_timeout_cs * HZ/100))
+				do_cancel = 1;
+
+			if ((lkb->lkb_flags & DLM_IFL_WATCH_TIMEWARN) &&
+			    time_after_eq(jiffies, lkb->lkb_timestamp +
+				   	   dlm_config.ci_timewarn_cs * HZ/100))
+				do_warn = 1;
+
+			if (!do_cancel && !do_warn)
+				continue;
+			hold_lkb(lkb);
+			break;
+		}
+		mutex_unlock(&ls->ls_timeout_mutex);
+
+		if (!do_cancel && !do_warn)
+			break;
+
+		r = lkb->lkb_resource;
+		hold_rsb(r);
+		lock_rsb(r);
+
+		if (do_warn) {
+			/* clear flag so we only warn once */
+			lkb->lkb_flags &= ~DLM_IFL_WATCH_TIMEWARN;
+			if (!(lkb->lkb_exflags & DLM_LKF_TIMEOUT))
+				del_timeout(lkb);
+			dlm_timeout_warn(lkb);
+		}
+
+		if (do_cancel) {
+			log_debug(ls, "timeout cancel %x node %d %s",
+				  lkb->lkb_id, lkb->lkb_nodeid, r->res_name);
+			lkb->lkb_flags &= ~DLM_IFL_WATCH_TIMEWARN;
+			lkb->lkb_flags |= DLM_IFL_TIMEOUT_CANCEL;
+			del_timeout(lkb);
+			_cancel_lock(r, lkb);
+		}
+
+		unlock_rsb(r);
+		unhold_rsb(r);
+		dlm_put_lkb(lkb);
+	}
+}
+
+/* This is only called by dlm_recoverd, and we rely on dlm_ls_stop() stopping
+   dlm_recoverd before checking/setting ls_recover_begin. */
+
+void dlm_adjust_timeouts(struct dlm_ls *ls)
+{
+	struct dlm_lkb *lkb;
+	long adj = jiffies - ls->ls_recover_begin;
+
+	ls->ls_recover_begin = 0;
+	mutex_lock(&ls->ls_timeout_mutex);
+	list_for_each_entry(lkb, &ls->ls_timeout, lkb_time_list)
+		lkb->lkb_timestamp += adj;
+	mutex_unlock(&ls->ls_timeout_mutex);
+}
+
 /* lkb is master or local copy */
 
 static void set_lvb_lock(struct dlm_rsb *r, struct dlm_lkb *lkb)
@@ -1275,10 +1414,8 @@ static int queue_conflict(struct list_head *head, struct dlm_lkb *lkb)
  * queue for one resource.  The granted mode of each lock blocks the requested
  * mode of the other lock."
  *
- * Part 2: if the granted mode of lkb is preventing the first lkb in the
- * convert queue from being granted, then demote lkb (set grmode to NL).
- * This second form requires that we check for conv-deadlk even when
- * now == 0 in _can_be_granted().
+ * Part 2: if the granted mode of lkb is preventing an earlier lkb in the
+ * convert queue from being granted, then deadlk/demote lkb.
  *
  * Example:
  * Granted Queue: empty
@@ -1287,41 +1424,52 @@ static int queue_conflict(struct list_head *head, struct dlm_lkb *lkb)
  *
  * The first lock can't be granted because of the granted mode of the second
  * lock and the second lock can't be granted because it's not first in the
- * list.  We demote the granted mode of the second lock (the lkb passed to this
- * function).
+ * list.  We either cancel lkb's conversion (PR->EX) and return EDEADLK, or we
+ * demote the granted mode of lkb (from PR to NL) if it has the CONVDEADLK
+ * flag set and return DEMOTED in the lksb flags.
+ *
+ * Originally, this function detected conv-deadlk in a more limited scope:
+ * - if !modes_compat(lkb1, lkb2) && !modes_compat(lkb2, lkb1), or
+ * - if lkb1 was the first entry in the queue (not just earlier), and was
+ *   blocked by the granted mode of lkb2, and there was nothing on the
+ *   granted queue preventing lkb1 from being granted immediately, i.e.
+ *   lkb2 was the only thing preventing lkb1 from being granted.
+ *
+ * That second condition meant we'd only say there was conv-deadlk if
+ * resolving it (by demotion) would lead to the first lock on the convert
+ * queue being granted right away.  It allowed conversion deadlocks to exist
+ * between locks on the convert queue while they couldn't be granted anyway.
  *
- * After the resolution, the "grant pending" function needs to go back and try
- * to grant locks on the convert queue again since the first lock can now be
- * granted.
+ * Now, we detect and take action on conversion deadlocks immediately when
+ * they're created, even if they may not be immediately consequential.  If
+ * lkb1 exists anywhere in the convert queue and lkb2 comes in with a granted
+ * mode that would prevent lkb1's conversion from being granted, we do a
+ * deadlk/demote on lkb2 right away and don't let it onto the convert queue.
+ * I think this means that the lkb_is_ahead condition below should always
+ * be zero, i.e. there will never be conv-deadlk between two locks that are
+ * both already on the convert queue.
  */
 
-static int conversion_deadlock_detect(struct dlm_rsb *rsb, struct dlm_lkb *lkb)
+static int conversion_deadlock_detect(struct dlm_rsb *r, struct dlm_lkb *lkb2)
 {
-	struct dlm_lkb *this, *first = NULL, *self = NULL;
+	struct dlm_lkb *lkb1;
+	int lkb_is_ahead = 0;
 
-	list_for_each_entry(this, &rsb->res_convertqueue, lkb_statequeue) {
-		if (!first)
-			first = this;
-		if (this == lkb) {
-			self = lkb;
+	list_for_each_entry(lkb1, &r->res_convertqueue, lkb_statequeue) {
+		if (lkb1 == lkb2) {
+			lkb_is_ahead = 1;
 			continue;
 		}
 
-		if (!modes_compat(this, lkb) && !modes_compat(lkb, this))
-			return 1;
-	}
-
-	/* if lkb is on the convert queue and is preventing the first
-	   from being granted, then there's deadlock and we demote lkb.
-	   multiple converting locks may need to do this before the first
-	   converting lock can be granted. */
-
-	if (self && self != first) {
-		if (!modes_compat(lkb, first) &&
-		    !queue_conflict(&rsb->res_grantqueue, first))
-			return 1;
+		if (!lkb_is_ahead) {
+			if (!modes_compat(lkb2, lkb1))
+				return 1;
+		} else {
+			if (!modes_compat(lkb2, lkb1) &&
+			    !modes_compat(lkb1, lkb2))
+				return 1;
+		}
 	}
-
 	return 0;
 }
 
@@ -1450,42 +1598,57 @@ static int _can_be_granted(struct dlm_rsb *r, struct dlm_lkb *lkb, int now)
 	if (!now && !conv && list_empty(&r->res_convertqueue) &&
 	    first_in_list(lkb, &r->res_waitqueue))
 		return 1;
-
  out:
-	/*
-	 * The following, enabled by CONVDEADLK, departs from VMS.
-	 */
-
-	if (conv && (lkb->lkb_exflags & DLM_LKF_CONVDEADLK) &&
-	    conversion_deadlock_detect(r, lkb)) {
-		lkb->lkb_grmode = DLM_LOCK_NL;
-		lkb->lkb_sbflags |= DLM_SBF_DEMOTED;
-	}
-
 	return 0;
 }
 
-/*
- * The ALTPR and ALTCW flags aren't traditional lock manager flags, but are a
- * simple way to provide a big optimization to applications that can use them.
- */
-
-static int can_be_granted(struct dlm_rsb *r, struct dlm_lkb *lkb, int now)
+static int can_be_granted(struct dlm_rsb *r, struct dlm_lkb *lkb, int now,
+			  int *err)
 {
-	uint32_t flags = lkb->lkb_exflags;
 	int rv;
 	int8_t alt = 0, rqmode = lkb->lkb_rqmode;
+	int8_t is_convert = (lkb->lkb_grmode != DLM_LOCK_IV);
+
+	if (err)
+		*err = 0;
 
 	rv = _can_be_granted(r, lkb, now);
 	if (rv)
 		goto out;
 
-	if (lkb->lkb_sbflags & DLM_SBF_DEMOTED)
+	/*
+	 * The CONVDEADLK flag is non-standard and tells the dlm to resolve
+	 * conversion deadlocks by demoting grmode to NL, otherwise the dlm
+	 * cancels one of the locks.
+	 */
+
+	if (is_convert && can_be_queued(lkb) &&
+	    conversion_deadlock_detect(r, lkb)) {
+		if (lkb->lkb_exflags & DLM_LKF_CONVDEADLK) {
+			lkb->lkb_grmode = DLM_LOCK_NL;
+			lkb->lkb_sbflags |= DLM_SBF_DEMOTED;
+		} else if (!(lkb->lkb_exflags & DLM_LKF_NODLCKWT)) {
+			if (err)
+				*err = -EDEADLK;
+			else {
+				log_print("can_be_granted deadlock %x now %d",
+					  lkb->lkb_id, now);
+				dlm_dump_rsb(r);
+			}
+		}
 		goto out;
+	}
 
-	if (rqmode != DLM_LOCK_PR && flags & DLM_LKF_ALTPR)
+	/*
+	 * The ALTPR and ALTCW flags are non-standard and tell the dlm to try
+	 * to grant a request in a mode other than the normal rqmode.  It's a
+	 * simple way to provide a big optimization to applications that can
+	 * use them.
+	 */
+
+	if (rqmode != DLM_LOCK_PR && (lkb->lkb_exflags & DLM_LKF_ALTPR))
 		alt = DLM_LOCK_PR;
-	else if (rqmode != DLM_LOCK_CW && flags & DLM_LKF_ALTCW)
+	else if (rqmode != DLM_LOCK_CW && (lkb->lkb_exflags & DLM_LKF_ALTCW))
 		alt = DLM_LOCK_CW;
 
 	if (alt) {
@@ -1500,10 +1663,20 @@ static int can_be_granted(struct dlm_rsb *r, struct dlm_lkb *lkb, int now)
 	return rv;
 }
 
+/* FIXME: I don't think that can_be_granted() can/will demote or find deadlock
+   for locks pending on the convert list.  Once verified (watch for these
+   log_prints), we should be able to just call _can_be_granted() and not
+   bother with the demote/deadlk cases here (and there's no easy way to deal
+   with a deadlk here, we'd have to generate something like grant_lock with
+   the deadlk error.) */
+
+/* returns the highest requested mode of all blocked conversions */
+
 static int grant_pending_convert(struct dlm_rsb *r, int high)
 {
 	struct dlm_lkb *lkb, *s;
 	int hi, demoted, quit, grant_restart, demote_restart;
+	int deadlk;
 
 	quit = 0;
  restart:
@@ -1513,14 +1686,29 @@ static int grant_pending_convert(struct dlm_rsb *r, int high)
 
 	list_for_each_entry_safe(lkb, s, &r->res_convertqueue, lkb_statequeue) {
 		demoted = is_demoted(lkb);
-		if (can_be_granted(r, lkb, 0)) {
+		deadlk = 0;
+
+		if (can_be_granted(r, lkb, 0, &deadlk)) {
 			grant_lock_pending(r, lkb);
 			grant_restart = 1;
-		} else {
-			hi = max_t(int, lkb->lkb_rqmode, hi);
-			if (!demoted && is_demoted(lkb))
-				demote_restart = 1;
+			continue;
 		}
+
+		if (!demoted && is_demoted(lkb)) {
+			log_print("WARN: pending demoted %x node %d %s",
+				  lkb->lkb_id, lkb->lkb_nodeid, r->res_name);
+			demote_restart = 1;
+			continue;
+		}
+
+		if (deadlk) {
+			log_print("WARN: pending deadlock %x node %d %s",
+				  lkb->lkb_id, lkb->lkb_nodeid, r->res_name);
+			dlm_dump_rsb(r);
+			continue;
+		}
+
+		hi = max_t(int, lkb->lkb_rqmode, hi);
 	}
 
 	if (grant_restart)
@@ -1538,7 +1726,7 @@ static int grant_pending_wait(struct dlm_rsb *r, int high)
 	struct dlm_lkb *lkb, *s;
 
 	list_for_each_entry_safe(lkb, s, &r->res_waitqueue, lkb_statequeue) {
-		if (can_be_granted(r, lkb, 0))
+		if (can_be_granted(r, lkb, 0, NULL))
 			grant_lock_pending(r, lkb);
                 else
 			high = max_t(int, lkb->lkb_rqmode, high);
@@ -1733,7 +1921,7 @@ static void confirm_master(struct dlm_rsb *r, int error)
 }
 
 static int set_lock_args(int mode, struct dlm_lksb *lksb, uint32_t flags,
-			 int namelen, uint32_t parent_lkid, void *ast,
+			 int namelen, unsigned long timeout_cs, void *ast,
 			 void *astarg, void *bast, struct dlm_args *args)
 {
 	int rv = -EINVAL;
@@ -1776,10 +1964,6 @@ static int set_lock_args(int mode, struct dlm_lksb *lksb, uint32_t flags,
 	if (flags & DLM_LKF_VALBLK && !lksb->sb_lvbptr)
 		goto out;
 
-	/* parent/child locks not yet supported */
-	if (parent_lkid)
-		goto out;
-
 	if (flags & DLM_LKF_CONVERT && !lksb->sb_lkid)
 		goto out;
 
@@ -1791,6 +1975,7 @@ static int set_lock_args(int mode, struct dlm_lksb *lksb, uint32_t flags,
 	args->astaddr = ast;
 	args->astparam = (long) astarg;
 	args->bastaddr = bast;
+	args->timeout = timeout_cs;
 	args->mode = mode;
 	args->lksb = lksb;
 	rv = 0;
@@ -1845,6 +2030,7 @@ static int validate_lock_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
 	lkb->lkb_lksb = args->lksb;
 	lkb->lkb_lvbptr = args->lksb->sb_lvbptr;
 	lkb->lkb_ownpid = (int) current->pid;
+	lkb->lkb_timeout_cs = args->timeout;
 	rv = 0;
  out:
 	return rv;
@@ -1903,6 +2089,9 @@ static int validate_unlock_args(struct dlm_lkb *lkb, struct dlm_args *args)
 		if (is_overlap(lkb))
 			goto out;
 
+		/* don't let scand try to do a cancel */
+		del_timeout(lkb);
+
 		if (lkb->lkb_flags & DLM_IFL_RESEND) {
 			lkb->lkb_flags |= DLM_IFL_OVERLAP_CANCEL;
 			rv = -EBUSY;
@@ -1934,6 +2123,9 @@ static int validate_unlock_args(struct dlm_lkb *lkb, struct dlm_args *args)
 		if (is_overlap_unlock(lkb))
 			goto out;
 
+		/* don't let scand try to do a cancel */
+		del_timeout(lkb);
+
 		if (lkb->lkb_flags & DLM_IFL_RESEND) {
 			lkb->lkb_flags |= DLM_IFL_OVERLAP_UNLOCK;
 			rv = -EBUSY;
@@ -1984,7 +2176,7 @@ static int do_request(struct dlm_rsb *r, struct dlm_lkb *lkb)
 {
 	int error = 0;
 
-	if (can_be_granted(r, lkb, 1)) {
+	if (can_be_granted(r, lkb, 1, NULL)) {
 		grant_lock(r, lkb);
 		queue_cast(r, lkb, 0);
 		goto out;
@@ -1994,6 +2186,7 @@ static int do_request(struct dlm_rsb *r, struct dlm_lkb *lkb)
 		error = -EINPROGRESS;
 		add_lkb(r, lkb, DLM_LKSTS_WAITING);
 		send_blocking_asts(r, lkb);
+		add_timeout(lkb);
 		goto out;
 	}
 
@@ -2009,16 +2202,32 @@ static int do_request(struct dlm_rsb *r, struct dlm_lkb *lkb)
 static int do_convert(struct dlm_rsb *r, struct dlm_lkb *lkb)
 {
 	int error = 0;
+	int deadlk = 0;
 
 	/* changing an existing lock may allow others to be granted */
 
-	if (can_be_granted(r, lkb, 1)) {
+	if (can_be_granted(r, lkb, 1, &deadlk)) {
 		grant_lock(r, lkb);
 		queue_cast(r, lkb, 0);
 		grant_pending_locks(r);
 		goto out;
 	}
 
+	/* can_be_granted() detected that this lock would block in a conversion
+	   deadlock, so we leave it on the granted queue and return EDEADLK in
+	   the ast for the convert. */
+
+	if (deadlk) {
+		/* it's left on the granted queue */
+		log_debug(r->res_ls, "deadlock %x node %d sts%d g%d r%d %s",
+			  lkb->lkb_id, lkb->lkb_nodeid, lkb->lkb_status,
+			  lkb->lkb_grmode, lkb->lkb_rqmode, r->res_name);
+		revert_lock(r, lkb);
+		queue_cast(r, lkb, -EDEADLK);
+		error = -EDEADLK;
+		goto out;
+	}
+
 	/* is_demoted() means the can_be_granted() above set the grmode
 	   to NL, and left us on the granted queue.  This auto-demotion
 	   (due to CONVDEADLK) might mean other locks, and/or this lock, are
@@ -2041,6 +2250,7 @@ static int do_convert(struct dlm_rsb *r, struct dlm_lkb *lkb)
 		del_lkb(r, lkb);
 		add_lkb(r, lkb, DLM_LKSTS_CONVERT);
 		send_blocking_asts(r, lkb);
+		add_timeout(lkb);
 		goto out;
 	}
 
@@ -2274,7 +2484,7 @@ int dlm_lock(dlm_lockspace_t *lockspace,
 	if (!ls)
 		return -EINVAL;
 
-	lock_recovery(ls);
+	dlm_lock_recovery(ls);
 
 	if (convert)
 		error = find_lkb(ls, lksb->sb_lkid, &lkb);
@@ -2284,7 +2494,7 @@ int dlm_lock(dlm_lockspace_t *lockspace,
 	if (error)
 		goto out;
 
-	error = set_lock_args(mode, lksb, flags, namelen, parent_lkid, ast,
+	error = set_lock_args(mode, lksb, flags, namelen, 0, ast,
 			      astarg, bast, &args);
 	if (error)
 		goto out_put;
@@ -2299,10 +2509,10 @@ int dlm_lock(dlm_lockspace_t *lockspace,
  out_put:
 	if (convert || error)
 		__put_lkb(ls, lkb);
-	if (error == -EAGAIN)
+	if (error == -EAGAIN || error == -EDEADLK)
 		error = 0;
  out:
-	unlock_recovery(ls);
+	dlm_unlock_recovery(ls);
 	dlm_put_lockspace(ls);
 	return error;
 }
@@ -2322,7 +2532,7 @@ int dlm_unlock(dlm_lockspace_t *lockspace,
 	if (!ls)
 		return -EINVAL;
 
-	lock_recovery(ls);
+	dlm_lock_recovery(ls);
 
 	error = find_lkb(ls, lkid, &lkb);
 	if (error)
@@ -2344,7 +2554,7 @@ int dlm_unlock(dlm_lockspace_t *lockspace,
  out_put:
 	dlm_put_lkb(lkb);
  out:
-	unlock_recovery(ls);
+	dlm_unlock_recovery(ls);
 	dlm_put_lockspace(ls);
 	return error;
 }
@@ -2384,7 +2594,7 @@ static int _create_message(struct dlm_ls *ls, int mb_len,
 	   pass into lowcomms_commit and a message buffer (mb) that we
 	   write our data into */
 
-	mh = dlm_lowcomms_get_buffer(to_nodeid, mb_len, GFP_KERNEL, &mb);
+	mh = dlm_lowcomms_get_buffer(to_nodeid, mb_len, ls->ls_allocation, &mb);
 	if (!mh)
 		return -ENOBUFS;
 
@@ -3111,9 +3321,10 @@ static void receive_request_reply(struct dlm_ls *ls, struct dlm_message *ms)
 		lkb->lkb_remid = ms->m_lkid;
 		if (is_altmode(lkb))
 			munge_altmode(lkb, ms);
-		if (result)
+		if (result) {
 			add_lkb(r, lkb, DLM_LKSTS_WAITING);
-		else {
+			add_timeout(lkb);
+		} else {
 			grant_lock_pc(r, lkb, ms);
 			queue_cast(r, lkb, 0);
 		}
@@ -3172,6 +3383,12 @@ static void __receive_convert_reply(struct dlm_rsb *r, struct dlm_lkb *lkb,
 		queue_cast(r, lkb, -EAGAIN);
 		break;
 
+	case -EDEADLK:
+		receive_flags_reply(lkb, ms);
+		revert_lock_pc(r, lkb);
+		queue_cast(r, lkb, -EDEADLK);
+		break;
+
 	case -EINPROGRESS:
 		/* convert was queued on remote master */
 		receive_flags_reply(lkb, ms);
@@ -3179,6 +3396,7 @@ static void __receive_convert_reply(struct dlm_rsb *r, struct dlm_lkb *lkb,
 			munge_demoted(lkb, ms);
 		del_lkb(r, lkb);
 		add_lkb(r, lkb, DLM_LKSTS_CONVERT);
+		add_timeout(lkb);
 		break;
 
 	case 0:
@@ -3298,8 +3516,7 @@ static void _receive_cancel_reply(struct dlm_lkb *lkb, struct dlm_message *ms)
 	case -DLM_ECANCEL:
 		receive_flags_reply(lkb, ms);
 		revert_lock_pc(r, lkb);
-		if (ms->m_result)
-			queue_cast(r, lkb, -DLM_ECANCEL);
+		queue_cast(r, lkb, -DLM_ECANCEL);
 		break;
 	case 0:
 		break;
@@ -3424,7 +3641,7 @@ int dlm_receive_message(struct dlm_header *hd, int nodeid, int recovery)
 			}
 		}
 
-		if (lock_recovery_try(ls))
+		if (dlm_lock_recovery_try(ls))
 			break;
 		schedule();
 	}
@@ -3503,7 +3720,7 @@ int dlm_receive_message(struct dlm_header *hd, int nodeid, int recovery)
 		log_error(ls, "unknown message type %d", ms->m_type);
 	}
 
-	unlock_recovery(ls);
+	dlm_unlock_recovery(ls);
  out:
 	dlm_put_lockspace(ls);
 	dlm_astd_wake();
@@ -4034,13 +4251,13 @@ int dlm_recover_process_copy(struct dlm_ls *ls, struct dlm_rcom *rc)
 
 int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua,
 		     int mode, uint32_t flags, void *name, unsigned int namelen,
-		     uint32_t parent_lkid)
+		     unsigned long timeout_cs)
 {
 	struct dlm_lkb *lkb;
 	struct dlm_args args;
 	int error;
 
-	lock_recovery(ls);
+	dlm_lock_recovery(ls);
 
 	error = create_lkb(ls, &lkb);
 	if (error) {
@@ -4062,7 +4279,7 @@ int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua,
 	   When DLM_IFL_USER is set, the dlm knows that this is a userspace
 	   lock and that lkb_astparam is the dlm_user_args structure. */
 
-	error = set_lock_args(mode, &ua->lksb, flags, namelen, parent_lkid,
+	error = set_lock_args(mode, &ua->lksb, flags, namelen, timeout_cs,
 			      DLM_FAKE_USER_AST, ua, DLM_FAKE_USER_AST, &args);
 	lkb->lkb_flags |= DLM_IFL_USER;
 	ua->old_mode = DLM_LOCK_IV;
@@ -4094,19 +4311,20 @@ int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua,
 	list_add_tail(&lkb->lkb_ownqueue, &ua->proc->locks);
 	spin_unlock(&ua->proc->locks_spin);
  out:
-	unlock_recovery(ls);
+	dlm_unlock_recovery(ls);
 	return error;
 }
 
 int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
-		     int mode, uint32_t flags, uint32_t lkid, char *lvb_in)
+		     int mode, uint32_t flags, uint32_t lkid, char *lvb_in,
+		     unsigned long timeout_cs)
 {
 	struct dlm_lkb *lkb;
 	struct dlm_args args;
 	struct dlm_user_args *ua;
 	int error;
 
-	lock_recovery(ls);
+	dlm_lock_recovery(ls);
 
 	error = find_lkb(ls, lkid, &lkb);
 	if (error)
@@ -4127,6 +4345,7 @@ int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
 	if (lvb_in && ua->lksb.sb_lvbptr)
 		memcpy(ua->lksb.sb_lvbptr, lvb_in, DLM_USER_LVB_LEN);
 
+	ua->xid = ua_tmp->xid;
 	ua->castparam = ua_tmp->castparam;
 	ua->castaddr = ua_tmp->castaddr;
 	ua->bastparam = ua_tmp->bastparam;
@@ -4134,19 +4353,19 @@ int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
 	ua->user_lksb = ua_tmp->user_lksb;
 	ua->old_mode = lkb->lkb_grmode;
 
-	error = set_lock_args(mode, &ua->lksb, flags, 0, 0, DLM_FAKE_USER_AST,
-			      ua, DLM_FAKE_USER_AST, &args);
+	error = set_lock_args(mode, &ua->lksb, flags, 0, timeout_cs,
+			      DLM_FAKE_USER_AST, ua, DLM_FAKE_USER_AST, &args);
 	if (error)
 		goto out_put;
 
 	error = convert_lock(ls, lkb, &args);
 
-	if (error == -EINPROGRESS || error == -EAGAIN)
+	if (error == -EINPROGRESS || error == -EAGAIN || error == -EDEADLK)
 		error = 0;
  out_put:
 	dlm_put_lkb(lkb);
  out:
-	unlock_recovery(ls);
+	dlm_unlock_recovery(ls);
 	kfree(ua_tmp);
 	return error;
 }
@@ -4159,7 +4378,7 @@ int dlm_user_unlock(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
 	struct dlm_user_args *ua;
 	int error;
 
-	lock_recovery(ls);
+	dlm_lock_recovery(ls);
 
 	error = find_lkb(ls, lkid, &lkb);
 	if (error)
@@ -4194,7 +4413,7 @@ int dlm_user_unlock(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
  out_put:
 	dlm_put_lkb(lkb);
  out:
-	unlock_recovery(ls);
+	dlm_unlock_recovery(ls);
 	kfree(ua_tmp);
 	return error;
 }
@@ -4207,7 +4426,7 @@ int dlm_user_cancel(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
 	struct dlm_user_args *ua;
 	int error;
 
-	lock_recovery(ls);
+	dlm_lock_recovery(ls);
 
 	error = find_lkb(ls, lkid, &lkb);
 	if (error)
@@ -4231,11 +4450,59 @@ int dlm_user_cancel(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
  out_put:
 	dlm_put_lkb(lkb);
  out:
-	unlock_recovery(ls);
+	dlm_unlock_recovery(ls);
 	kfree(ua_tmp);
 	return error;
 }
 
+int dlm_user_deadlock(struct dlm_ls *ls, uint32_t flags, uint32_t lkid)
+{
+	struct dlm_lkb *lkb;
+	struct dlm_args args;
+	struct dlm_user_args *ua;
+	struct dlm_rsb *r;
+	int error;
+
+	dlm_lock_recovery(ls);
+
+	error = find_lkb(ls, lkid, &lkb);
+	if (error)
+		goto out;
+
+	ua = (struct dlm_user_args *)lkb->lkb_astparam;
+
+	error = set_unlock_args(flags, ua, &args);
+	if (error)
+		goto out_put;
+
+	/* same as cancel_lock(), but set DEADLOCK_CANCEL after lock_rsb */
+
+	r = lkb->lkb_resource;
+	hold_rsb(r);
+	lock_rsb(r);
+
+	error = validate_unlock_args(lkb, &args);
+	if (error)
+		goto out_r;
+	lkb->lkb_flags |= DLM_IFL_DEADLOCK_CANCEL;
+
+	error = _cancel_lock(r, lkb);
+ out_r:
+	unlock_rsb(r);
+	put_rsb(r);
+
+	if (error == -DLM_ECANCEL)
+		error = 0;
+	/* from validate_unlock_args() */
+	if (error == -EBUSY)
+		error = 0;
+ out_put:
+	dlm_put_lkb(lkb);
+ out:
+	dlm_unlock_recovery(ls);
+	return error;
+}
+
 /* lkb's that are removed from the waiters list by revert are just left on the
    orphans list with the granted orphan locks, to be freed by purge */
 
@@ -4314,12 +4581,13 @@ void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc)
 {
 	struct dlm_lkb *lkb, *safe;
 
-	lock_recovery(ls);
+	dlm_lock_recovery(ls);
 
 	while (1) {
 		lkb = del_proc_lock(ls, proc);
 		if (!lkb)
 			break;
+		del_timeout(lkb);
 		if (lkb->lkb_exflags & DLM_LKF_PERSISTENT)
 			orphan_proc_lock(ls, lkb);
 		else
@@ -4347,7 +4615,7 @@ void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc)
 	}
 
 	mutex_unlock(&ls->ls_clear_proc_locks);
-	unlock_recovery(ls);
+	dlm_unlock_recovery(ls);
 }
 
 static void purge_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc)
@@ -4429,12 +4697,12 @@ int dlm_user_purge(struct dlm_ls *ls, struct dlm_user_proc *proc,
 	if (nodeid != dlm_our_nodeid()) {
 		error = send_purge(ls, nodeid, pid);
 	} else {
-		lock_recovery(ls);
+		dlm_lock_recovery(ls);
 		if (pid == current->pid)
 			purge_proc_locks(ls, proc);
 		else
 			do_purge(ls, nodeid, pid);
-		unlock_recovery(ls);
+		dlm_unlock_recovery(ls);
 	}
 	return error;
 }
diff --git a/fs/dlm/lock.h b/fs/dlm/lock.h
index 64fc4ec..1720313 100644
--- a/fs/dlm/lock.h
+++ b/fs/dlm/lock.h
@@ -1,7 +1,7 @@
 /******************************************************************************
 *******************************************************************************
 **
-**  Copyright (C) 2005 Red Hat, Inc.  All rights reserved.
+**  Copyright (C) 2005-2007 Red Hat, Inc.  All rights reserved.
 **
 **  This copyrighted material is made available to anyone wishing to use,
 **  modify, copy, or redistribute it subject to the terms and conditions
@@ -24,6 +24,10 @@ void dlm_put_rsb(struct dlm_rsb *r);
 void dlm_hold_rsb(struct dlm_rsb *r);
 int dlm_put_lkb(struct dlm_lkb *lkb);
 void dlm_scan_rsbs(struct dlm_ls *ls);
+int dlm_lock_recovery_try(struct dlm_ls *ls);
+void dlm_unlock_recovery(struct dlm_ls *ls);
+void dlm_scan_timeout(struct dlm_ls *ls);
+void dlm_adjust_timeouts(struct dlm_ls *ls);
 
 int dlm_purge_locks(struct dlm_ls *ls);
 void dlm_purge_mstcpy_locks(struct dlm_rsb *r);
@@ -34,15 +38,18 @@ int dlm_recover_master_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
 int dlm_recover_process_copy(struct dlm_ls *ls, struct dlm_rcom *rc);
 
 int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua, int mode,
-	uint32_t flags, void *name, unsigned int namelen, uint32_t parent_lkid);
+	uint32_t flags, void *name, unsigned int namelen,
+	unsigned long timeout_cs);
 int dlm_user_convert(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
-	int mode, uint32_t flags, uint32_t lkid, char *lvb_in);
+	int mode, uint32_t flags, uint32_t lkid, char *lvb_in,
+	unsigned long timeout_cs);
 int dlm_user_unlock(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
 	uint32_t flags, uint32_t lkid, char *lvb_in);
 int dlm_user_cancel(struct dlm_ls *ls,  struct dlm_user_args *ua_tmp,
 	uint32_t flags, uint32_t lkid);
 int dlm_user_purge(struct dlm_ls *ls, struct dlm_user_proc *proc,
 	int nodeid, int pid);
+int dlm_user_deadlock(struct dlm_ls *ls, uint32_t flags, uint32_t lkid);
 void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc);
 
 static inline int is_master(struct dlm_rsb *r)
diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index a677b2a..1dc7210 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -197,13 +197,24 @@ static int do_uevent(struct dlm_ls *ls, int in)
 	else
 		kobject_uevent(&ls->ls_kobj, KOBJ_OFFLINE);
 
+	log_debug(ls, "%s the lockspace group...", in ? "joining" : "leaving");
+
+	/* dlm_controld will see the uevent, do the necessary group management
+	   and then write to sysfs to wake us */
+
 	error = wait_event_interruptible(ls->ls_uevent_wait,
 			test_and_clear_bit(LSFL_UEVENT_WAIT, &ls->ls_flags));
+
+	log_debug(ls, "group event done %d %d", error, ls->ls_uevent_result);
+
 	if (error)
 		goto out;
 
 	error = ls->ls_uevent_result;
  out:
+	if (error)
+		log_error(ls, "group %s failed %d %d", in ? "join" : "leave",
+			  error, ls->ls_uevent_result);
 	return error;
 }
 
@@ -234,8 +245,13 @@ static int dlm_scand(void *data)
 	struct dlm_ls *ls;
 
 	while (!kthread_should_stop()) {
-		list_for_each_entry(ls, &lslist, ls_list)
-			dlm_scan_rsbs(ls);
+		list_for_each_entry(ls, &lslist, ls_list) {
+			if (dlm_lock_recovery_try(ls)) {
+				dlm_scan_rsbs(ls);
+				dlm_scan_timeout(ls);
+				dlm_unlock_recovery(ls);
+			}
+		}
 		schedule_timeout_interruptible(dlm_config.ci_scan_secs * HZ);
 	}
 	return 0;
@@ -395,6 +411,7 @@ static int new_lockspace(char *name, int namelen, void **lockspace,
 {
 	struct dlm_ls *ls;
 	int i, size, error = -ENOMEM;
+	int do_unreg = 0;
 
 	if (namelen > DLM_LOCKSPACE_LEN)
 		return -EINVAL;
@@ -417,11 +434,22 @@ static int new_lockspace(char *name, int namelen, void **lockspace,
 		goto out;
 	memcpy(ls->ls_name, name, namelen);
 	ls->ls_namelen = namelen;
-	ls->ls_exflags = flags;
 	ls->ls_lvblen = lvblen;
 	ls->ls_count = 0;
 	ls->ls_flags = 0;
 
+	if (flags & DLM_LSFL_TIMEWARN)
+		set_bit(LSFL_TIMEWARN, &ls->ls_flags);
+
+	if (flags & DLM_LSFL_FS)
+		ls->ls_allocation = GFP_NOFS;
+	else
+		ls->ls_allocation = GFP_KERNEL;
+
+	/* ls_exflags are forced to match among nodes, and we don't
+	   need to require all nodes to have TIMEWARN or FS set */
+	ls->ls_exflags = (flags & ~(DLM_LSFL_TIMEWARN | DLM_LSFL_FS));
+
 	size = dlm_config.ci_rsbtbl_size;
 	ls->ls_rsbtbl_size = size;
 
@@ -461,6 +489,8 @@ static int new_lockspace(char *name, int namelen, void **lockspace,
 	mutex_init(&ls->ls_waiters_mutex);
 	INIT_LIST_HEAD(&ls->ls_orphans);
 	mutex_init(&ls->ls_orphans_mutex);
+	INIT_LIST_HEAD(&ls->ls_timeout);
+	mutex_init(&ls->ls_timeout_mutex);
 
 	INIT_LIST_HEAD(&ls->ls_nodes);
 	INIT_LIST_HEAD(&ls->ls_nodes_gone);
@@ -477,6 +507,8 @@ static int new_lockspace(char *name, int namelen, void **lockspace,
 
 	init_waitqueue_head(&ls->ls_uevent_wait);
 	ls->ls_uevent_result = 0;
+	init_completion(&ls->ls_members_done);
+	ls->ls_members_result = -1;
 
 	ls->ls_recoverd_task = NULL;
 	mutex_init(&ls->ls_recoverd_active);
@@ -513,32 +545,49 @@ static int new_lockspace(char *name, int namelen, void **lockspace,
 	error = dlm_recoverd_start(ls);
 	if (error) {
 		log_error(ls, "can't start dlm_recoverd %d", error);
-		goto out_rcomfree;
+		goto out_delist;
 	}
 
-	dlm_create_debug_file(ls);
-
 	error = kobject_setup(ls);
 	if (error)
-		goto out_del;
+		goto out_stop;
 
 	error = kobject_register(&ls->ls_kobj);
 	if (error)
-		goto out_del;
+		goto out_stop;
+
+	/* let kobject handle freeing of ls if there's an error */
+	do_unreg = 1;
+
+	/* This uevent triggers dlm_controld in userspace to add us to the
+	   group of nodes that are members of this lockspace (managed by the
+	   cluster infrastructure.)  Once it's done that, it tells us who the
+	   current lockspace members are (via configfs) and then tells the
+	   lockspace to start running (via sysfs) in dlm_ls_start(). */
 
 	error = do_uevent(ls, 1);
 	if (error)
-		goto out_unreg;
+		goto out_stop;
+
+	wait_for_completion(&ls->ls_members_done);
+	error = ls->ls_members_result;
+	if (error)
+		goto out_members;
+
+	dlm_create_debug_file(ls);
+
+	log_debug(ls, "join complete");
 
 	*lockspace = ls;
 	return 0;
 
- out_unreg:
-	kobject_unregister(&ls->ls_kobj);
- out_del:
-	dlm_delete_debug_file(ls);
+ out_members:
+	do_uevent(ls, 0);
+	dlm_clear_members(ls);
+	kfree(ls->ls_node_array);
+ out_stop:
 	dlm_recoverd_stop(ls);
- out_rcomfree:
+ out_delist:
 	spin_lock(&lslist_lock);
 	list_del(&ls->ls_list);
 	spin_unlock(&lslist_lock);
@@ -550,7 +599,10 @@ static int new_lockspace(char *name, int namelen, void **lockspace,
  out_rsbfree:
 	kfree(ls->ls_rsbtbl);
  out_lsfree:
-	kfree(ls);
+	if (do_unreg)
+		kobject_unregister(&ls->ls_kobj);
+	else
+		kfree(ls);
  out:
 	module_put(THIS_MODULE);
 	return error;
@@ -570,6 +622,8 @@ int dlm_new_lockspace(char *name, int namelen, void **lockspace,
 	error = new_lockspace(name, namelen, lockspace, flags, lvblen);
 	if (!error)
 		ls_count++;
+	else if (!ls_count)
+		threads_stop();
  out:
 	mutex_unlock(&ls_lock);
 	return error;
@@ -696,7 +750,7 @@ static int release_lockspace(struct dlm_ls *ls, int force)
 	dlm_clear_members_gone(ls);
 	kfree(ls->ls_node_array);
 	kobject_unregister(&ls->ls_kobj);
-        /* The ls structure will be freed when the kobject is done with */
+	/* The ls structure will be freed when the kobject is done with */
 
 	mutex_lock(&ls_lock);
 	ls_count--;
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 27970a5..0553a61 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -260,7 +260,7 @@ static int nodeid_to_addr(int nodeid, struct sockaddr *retaddr)
 static void lowcomms_data_ready(struct sock *sk, int count_unused)
 {
 	struct connection *con = sock2con(sk);
-	if (!test_and_set_bit(CF_READ_PENDING, &con->flags))
+	if (con && !test_and_set_bit(CF_READ_PENDING, &con->flags))
 		queue_work(recv_workqueue, &con->rwork);
 }
 
@@ -268,7 +268,7 @@ static void lowcomms_write_space(struct sock *sk)
 {
 	struct connection *con = sock2con(sk);
 
-	if (!test_and_set_bit(CF_WRITE_PENDING, &con->flags))
+	if (con && !test_and_set_bit(CF_WRITE_PENDING, &con->flags))
 		queue_work(send_workqueue, &con->swork);
 }
 
@@ -720,11 +720,17 @@ static int tcp_accept_from_sock(struct connection *con)
 			INIT_WORK(&othercon->rwork, process_recv_sockets);
 			set_bit(CF_IS_OTHERCON, &othercon->flags);
 			newcon->othercon = othercon;
+			othercon->sock = newsock;
+			newsock->sk->sk_user_data = othercon;
+			add_sock(newsock, othercon);
+			addcon = othercon;
+		}
+		else {
+			printk("Extra connection from node %d attempted\n", nodeid);
+			result = -EAGAIN;
+			mutex_unlock(&newcon->sock_mutex);
+			goto accept_err;
 		}
-		othercon->sock = newsock;
-		newsock->sk->sk_user_data = othercon;
-		add_sock(newsock, othercon);
-		addcon = othercon;
 	}
 	else {
 		newsock->sk->sk_user_data = newcon;
@@ -1400,8 +1406,11 @@ void dlm_lowcomms_stop(void)
 	down(&connections_lock);
 	for (i = 0; i <= max_nodeid; i++) {
 		con = __nodeid2con(i, 0);
-		if (con)
+		if (con) {
 			con->flags |= 0xFF;
+			if (con->sock)
+				con->sock->sk->sk_user_data = NULL;
+		}
 	}
 	up(&connections_lock);
 
diff --git a/fs/dlm/main.c b/fs/dlm/main.c
index 162fbae..eca2907 100644
--- a/fs/dlm/main.c
+++ b/fs/dlm/main.c
@@ -2,7 +2,7 @@
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
-**  Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
+**  Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
 **
 **  This copyrighted material is made available to anyone wishing to use,
 **  modify, copy, or redistribute it subject to the terms and conditions
@@ -25,6 +25,8 @@ void dlm_unregister_debugfs(void);
 static inline int dlm_register_debugfs(void) { return 0; }
 static inline void dlm_unregister_debugfs(void) { }
 #endif
+int dlm_netlink_init(void);
+void dlm_netlink_exit(void);
 
 static int __init init_dlm(void)
 {
@@ -50,10 +52,16 @@ static int __init init_dlm(void)
 	if (error)
 		goto out_debug;
 
+	error = dlm_netlink_init();
+	if (error)
+		goto out_user;
+
 	printk("DLM (built %s %s) installed\n", __DATE__, __TIME__);
 
 	return 0;
 
+ out_user:
+	dlm_user_exit();
  out_debug:
 	dlm_unregister_debugfs();
  out_config:
@@ -68,6 +76,7 @@ static int __init init_dlm(void)
 
 static void __exit exit_dlm(void)
 {
+	dlm_netlink_exit();
 	dlm_user_exit();
 	dlm_config_exit();
 	dlm_memory_exit();
diff --git a/fs/dlm/member.c b/fs/dlm/member.c
index 85e2897..073599d 100644
--- a/fs/dlm/member.c
+++ b/fs/dlm/member.c
@@ -1,7 +1,7 @@
 /******************************************************************************
 *******************************************************************************
 **
-**  Copyright (C) 2005 Red Hat, Inc.  All rights reserved.
+**  Copyright (C) 2005-2007 Red Hat, Inc.  All rights reserved.
 **
 **  This copyrighted material is made available to anyone wishing to use,
 **  modify, copy, or redistribute it subject to the terms and conditions
@@ -233,6 +233,12 @@ int dlm_recover_members(struct dlm_ls *ls, struct dlm_recover *rv, int *neg_out)
 	*neg_out = neg;
 
 	error = ping_members(ls);
+	if (!error || error == -EPROTO) {
+		/* new_lockspace() may be waiting to know if the config
+		   is good or bad */
+		ls->ls_members_result = error;
+		complete(&ls->ls_members_done);
+	}
 	if (error)
 		goto out;
 
@@ -284,6 +290,9 @@ int dlm_ls_stop(struct dlm_ls *ls)
 	dlm_recoverd_suspend(ls);
 	ls->ls_recover_status = 0;
 	dlm_recoverd_resume(ls);
+
+	if (!ls->ls_recover_begin)
+		ls->ls_recover_begin = jiffies;
 	return 0;
 }
 
diff --git a/fs/dlm/netlink.c b/fs/dlm/netlink.c
new file mode 100644
index 0000000..863b87d
--- /dev/null
+++ b/fs/dlm/netlink.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2007 Red Hat, Inc.  All rights reserved.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License v.2.
+ */
+
+#include <net/genetlink.h>
+#include <linux/dlm.h>
+#include <linux/dlm_netlink.h>
+
+#include "dlm_internal.h"
+
+static uint32_t dlm_nl_seqnum;
+static uint32_t listener_nlpid;
+
+static struct genl_family family = {
+	.id		= GENL_ID_GENERATE,
+	.name		= DLM_GENL_NAME,
+	.version	= DLM_GENL_VERSION,
+};
+
+static int prepare_data(u8 cmd, struct sk_buff **skbp, size_t size)
+{
+	struct sk_buff *skb;
+	void *data;
+
+	skb = genlmsg_new(size, GFP_KERNEL);
+	if (!skb)
+		return -ENOMEM;
+
+	/* add the message headers */
+	data = genlmsg_put(skb, 0, dlm_nl_seqnum++, &family, 0, cmd);
+	if (!data) {
+		nlmsg_free(skb);
+		return -EINVAL;
+	}
+
+	*skbp = skb;
+	return 0;
+}
+
+static struct dlm_lock_data *mk_data(struct sk_buff *skb)
+{
+	struct nlattr *ret;
+
+	ret = nla_reserve(skb, DLM_TYPE_LOCK, sizeof(struct dlm_lock_data));
+	if (!ret)
+		return NULL;
+	return nla_data(ret);
+}
+
+static int send_data(struct sk_buff *skb)
+{
+	struct genlmsghdr *genlhdr = nlmsg_data((struct nlmsghdr *)skb->data);
+	void *data = genlmsg_data(genlhdr);
+	int rv;
+
+	rv = genlmsg_end(skb, data);
+	if (rv < 0) {
+		nlmsg_free(skb);
+		return rv;
+	}
+
+	return genlmsg_unicast(skb, listener_nlpid);
+}
+
+static int user_cmd(struct sk_buff *skb, struct genl_info *info)
+{
+	listener_nlpid = info->snd_pid;
+	printk("user_cmd nlpid %u\n", listener_nlpid);
+	return 0;
+}
+
+static struct genl_ops dlm_nl_ops = {
+	.cmd		= DLM_CMD_HELLO,
+	.doit		= user_cmd,
+};
+
+int dlm_netlink_init(void)
+{
+	int rv;
+
+	rv = genl_register_family(&family);
+	if (rv)
+		return rv;
+
+	rv = genl_register_ops(&family, &dlm_nl_ops);
+	if (rv < 0)
+		goto err;
+	return 0;
+ err:
+	genl_unregister_family(&family);
+	return rv;
+}
+
+void dlm_netlink_exit(void)
+{
+	genl_unregister_ops(&family, &dlm_nl_ops);
+	genl_unregister_family(&family);
+}
+
+static void fill_data(struct dlm_lock_data *data, struct dlm_lkb *lkb)
+{
+	struct dlm_rsb *r = lkb->lkb_resource;
+	struct dlm_user_args *ua = (struct dlm_user_args *) lkb->lkb_astparam;
+
+	memset(data, 0, sizeof(struct dlm_lock_data));
+
+	data->version = DLM_LOCK_DATA_VERSION;
+	data->nodeid = lkb->lkb_nodeid;
+	data->ownpid = lkb->lkb_ownpid;
+	data->id = lkb->lkb_id;
+	data->remid = lkb->lkb_remid;
+	data->status = lkb->lkb_status;
+	data->grmode = lkb->lkb_grmode;
+	data->rqmode = lkb->lkb_rqmode;
+	data->timestamp = lkb->lkb_timestamp;
+	if (ua)
+		data->xid = ua->xid;
+	if (r) {
+		data->lockspace_id = r->res_ls->ls_global_id;
+		data->resource_namelen = r->res_length;
+		memcpy(data->resource_name, r->res_name, r->res_length);
+	}
+}
+
+void dlm_timeout_warn(struct dlm_lkb *lkb)
+{
+	struct dlm_lock_data *data;
+	struct sk_buff *send_skb;
+	size_t size;
+	int rv;
+
+	size = nla_total_size(sizeof(struct dlm_lock_data)) +
+	       nla_total_size(0); /* why this? */
+
+	rv = prepare_data(DLM_CMD_TIMEOUT, &send_skb, size);
+	if (rv < 0)
+		return;
+
+	data = mk_data(send_skb);
+	if (!data) {
+		nlmsg_free(send_skb);
+		return;
+	}
+
+	fill_data(data, lkb);
+
+	send_data(send_skb);
+}
+
diff --git a/fs/dlm/rcom.c b/fs/dlm/rcom.c
index 6bfbd61..e3a1527 100644
--- a/fs/dlm/rcom.c
+++ b/fs/dlm/rcom.c
@@ -38,7 +38,7 @@ static int create_rcom(struct dlm_ls *ls, int to_nodeid, int type, int len,
 	char *mb;
 	int mb_len = sizeof(struct dlm_rcom) + len;
 
-	mh = dlm_lowcomms_get_buffer(to_nodeid, mb_len, GFP_KERNEL, &mb);
+	mh = dlm_lowcomms_get_buffer(to_nodeid, mb_len, ls->ls_allocation, &mb);
 	if (!mh) {
 		log_print("create_rcom to %d type %d len %d ENOBUFS",
 			  to_nodeid, type, len);
@@ -90,7 +90,7 @@ static int check_config(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
 		log_error(ls, "version mismatch: %x nodeid %d: %x",
 			  DLM_HEADER_MAJOR | DLM_HEADER_MINOR, nodeid,
 			  rc->rc_header.h_version);
-		return -EINVAL;
+		return -EPROTO;
 	}
 
 	if (rf->rf_lvblen != ls->ls_lvblen ||
@@ -98,7 +98,7 @@ static int check_config(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid)
 		log_error(ls, "config mismatch: %d,%x nodeid %d: %d,%x",
 			  ls->ls_lvblen, ls->ls_exflags,
 			  nodeid, rf->rf_lvblen, rf->rf_lsflags);
-		return -EINVAL;
+		return -EPROTO;
 	}
 	return 0;
 }
@@ -386,7 +386,8 @@ static void receive_rcom_lock_reply(struct dlm_ls *ls, struct dlm_rcom *rc_in)
 	dlm_recover_process_copy(ls, rc_in);
 }
 
-static int send_ls_not_ready(int nodeid, struct dlm_rcom *rc_in)
+static int send_ls_not_ready(struct dlm_ls *ls, int nodeid,
+			     struct dlm_rcom *rc_in)
 {
 	struct dlm_rcom *rc;
 	struct rcom_config *rf;
@@ -394,7 +395,7 @@ static int send_ls_not_ready(int nodeid, struct dlm_rcom *rc_in)
 	char *mb;
 	int mb_len = sizeof(struct dlm_rcom) + sizeof(struct rcom_config);
 
-	mh = dlm_lowcomms_get_buffer(nodeid, mb_len, GFP_KERNEL, &mb);
+	mh = dlm_lowcomms_get_buffer(nodeid, mb_len, ls->ls_allocation, &mb);
 	if (!mh)
 		return -ENOBUFS;
 	memset(mb, 0, mb_len);
@@ -464,7 +465,7 @@ void dlm_receive_rcom(struct dlm_header *hd, int nodeid)
 		log_print("lockspace %x from %d type %x not found",
 			  hd->h_lockspace, nodeid, rc->rc_type);
 		if (rc->rc_type == DLM_RCOM_STATUS)
-			send_ls_not_ready(nodeid, rc);
+			send_ls_not_ready(ls, nodeid, rc);
 		return;
 	}
 
diff --git a/fs/dlm/recoverd.c b/fs/dlm/recoverd.c
index 3cb636d..6657599 100644
--- a/fs/dlm/recoverd.c
+++ b/fs/dlm/recoverd.c
@@ -2,7 +2,7 @@
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
-**  Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
+**  Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
 **
 **  This copyrighted material is made available to anyone wishing to use,
 **  modify, copy, or redistribute it subject to the terms and conditions
@@ -190,6 +190,8 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv)
 
 	dlm_clear_members_gone(ls);
 
+	dlm_adjust_timeouts(ls);
+
 	error = enable_locking(ls, rv->seq);
 	if (error) {
 		log_debug(ls, "enable_locking failed %d", error);
diff --git a/fs/dlm/user.c b/fs/dlm/user.c
index b0201ec..6438941 100644
--- a/fs/dlm/user.c
+++ b/fs/dlm/user.c
@@ -33,16 +33,17 @@ static const struct file_operations device_fops;
 struct dlm_lock_params32 {
 	__u8 mode;
 	__u8 namelen;
-	__u16 flags;
+	__u16 unused;
+	__u32 flags;
 	__u32 lkid;
 	__u32 parent;
-
+	__u64 xid;
+	__u64 timeout;
 	__u32 castparam;
 	__u32 castaddr;
 	__u32 bastparam;
 	__u32 bastaddr;
 	__u32 lksb;
-
 	char lvb[DLM_USER_LVB_LEN];
 	char name[0];
 };
@@ -68,6 +69,7 @@ struct dlm_lksb32 {
 };
 
 struct dlm_lock_result32 {
+	__u32 version[3];
 	__u32 length;
 	__u32 user_astaddr;
 	__u32 user_astparam;
@@ -102,6 +104,8 @@ static void compat_input(struct dlm_write_request *kb,
 		kb->i.lock.flags = kb32->i.lock.flags;
 		kb->i.lock.lkid = kb32->i.lock.lkid;
 		kb->i.lock.parent = kb32->i.lock.parent;
+		kb->i.lock.xid = kb32->i.lock.xid;
+		kb->i.lock.timeout = kb32->i.lock.timeout;
 		kb->i.lock.castparam = (void *)(long)kb32->i.lock.castparam;
 		kb->i.lock.castaddr = (void *)(long)kb32->i.lock.castaddr;
 		kb->i.lock.bastparam = (void *)(long)kb32->i.lock.bastparam;
@@ -115,6 +119,10 @@ static void compat_input(struct dlm_write_request *kb,
 static void compat_output(struct dlm_lock_result *res,
 			  struct dlm_lock_result32 *res32)
 {
+	res32->version[0] = res->version[0];
+	res32->version[1] = res->version[1];
+	res32->version[2] = res->version[2];
+
 	res32->user_astaddr = (__u32)(long)res->user_astaddr;
 	res32->user_astparam = (__u32)(long)res->user_astparam;
 	res32->user_lksb = (__u32)(long)res->user_lksb;
@@ -130,6 +138,36 @@ static void compat_output(struct dlm_lock_result *res,
 }
 #endif
 
+/* Figure out if this lock is at the end of its life and no longer
+   available for the application to use.  The lkb still exists until
+   the final ast is read.  A lock becomes EOL in three situations:
+     1. a noqueue request fails with EAGAIN
+     2. an unlock completes with EUNLOCK
+     3. a cancel of a waiting request completes with ECANCEL/EDEADLK
+   An EOL lock needs to be removed from the process's list of locks.
+   And we can't allow any new operation on an EOL lock.  This is
+   not related to the lifetime of the lkb struct which is managed
+   entirely by refcount. */
+
+static int lkb_is_endoflife(struct dlm_lkb *lkb, int sb_status, int type)
+{
+	switch (sb_status) {
+	case -DLM_EUNLOCK:
+		return 1;
+	case -DLM_ECANCEL:
+	case -ETIMEDOUT:
+	case -EDEADLK:
+		if (lkb->lkb_grmode == DLM_LOCK_IV)
+			return 1;
+		break;
+	case -EAGAIN:
+		if (type == AST_COMP && lkb->lkb_grmode == DLM_LOCK_IV)
+			return 1;
+		break;
+	}
+	return 0;
+}
+
 /* we could possibly check if the cancel of an orphan has resulted in the lkb
    being removed and then remove that lkb from the orphans list and free it */
 
@@ -176,25 +214,7 @@ void dlm_user_add_ast(struct dlm_lkb *lkb, int type)
 		log_debug(ls, "ast overlap %x status %x %x",
 			  lkb->lkb_id, ua->lksb.sb_status, lkb->lkb_flags);
 
-	/* Figure out if this lock is at the end of its life and no longer
-	   available for the application to use.  The lkb still exists until
-	   the final ast is read.  A lock becomes EOL in three situations:
-	     1. a noqueue request fails with EAGAIN
-	     2. an unlock completes with EUNLOCK
-	     3. a cancel of a waiting request completes with ECANCEL
-	   An EOL lock needs to be removed from the process's list of locks.
-	   And we can't allow any new operation on an EOL lock.  This is
-	   not related to the lifetime of the lkb struct which is managed
-	   entirely by refcount. */
-
-	if (type == AST_COMP &&
-	    lkb->lkb_grmode == DLM_LOCK_IV &&
-	    ua->lksb.sb_status == -EAGAIN)
-		eol = 1;
-	else if (ua->lksb.sb_status == -DLM_EUNLOCK ||
-	    (ua->lksb.sb_status == -DLM_ECANCEL &&
-	     lkb->lkb_grmode == DLM_LOCK_IV))
-		eol = 1;
+	eol = lkb_is_endoflife(lkb, ua->lksb.sb_status, type);
 	if (eol) {
 		lkb->lkb_ast_type &= ~AST_BAST;
 		lkb->lkb_flags |= DLM_IFL_ENDOFLIFE;
@@ -252,16 +272,18 @@ static int device_user_lock(struct dlm_user_proc *proc,
 	ua->castaddr = params->castaddr;
 	ua->bastparam = params->bastparam;
 	ua->bastaddr = params->bastaddr;
+	ua->xid = params->xid;
 
 	if (params->flags & DLM_LKF_CONVERT)
 		error = dlm_user_convert(ls, ua,
 				         params->mode, params->flags,
-				         params->lkid, params->lvb);
+				         params->lkid, params->lvb,
+					 (unsigned long) params->timeout);
 	else {
 		error = dlm_user_request(ls, ua,
 					 params->mode, params->flags,
 					 params->name, params->namelen,
-					 params->parent);
+					 (unsigned long) params->timeout);
 		if (!error)
 			error = ua->lksb.sb_lkid;
 	}
@@ -299,6 +321,22 @@ static int device_user_unlock(struct dlm_user_proc *proc,
 	return error;
 }
 
+static int device_user_deadlock(struct dlm_user_proc *proc,
+				struct dlm_lock_params *params)
+{
+	struct dlm_ls *ls;
+	int error;
+
+	ls = dlm_find_lockspace_local(proc->lockspace);
+	if (!ls)
+		return -ENOENT;
+
+	error = dlm_user_deadlock(ls, params->flags, params->lkid);
+
+	dlm_put_lockspace(ls);
+	return error;
+}
+
 static int create_misc_device(struct dlm_ls *ls, char *name)
 {
 	int error, len;
@@ -348,7 +386,7 @@ static int device_create_lockspace(struct dlm_lspace_params *params)
 		return -EPERM;
 
 	error = dlm_new_lockspace(params->name, strlen(params->name),
-				  &lockspace, 0, DLM_USER_LVB_LEN);
+				  &lockspace, params->flags, DLM_USER_LVB_LEN);
 	if (error)
 		return error;
 
@@ -524,6 +562,14 @@ static ssize_t device_write(struct file *file, const char __user *buf,
 		error = device_user_unlock(proc, &kbuf->i.lock);
 		break;
 
+	case DLM_USER_DEADLOCK:
+		if (!proc) {
+			log_print("no locking on control device");
+			goto out_sig;
+		}
+		error = device_user_deadlock(proc, &kbuf->i.lock);
+		break;
+
 	case DLM_USER_CREATE_LOCKSPACE:
 		if (proc) {
 			log_print("create/remove only on control device");
@@ -641,6 +687,9 @@ static int copy_result_to_user(struct dlm_user_args *ua, int compat, int type,
 	int struct_len;
 
 	memset(&result, 0, sizeof(struct dlm_lock_result));
+	result.version[0] = DLM_DEVICE_VERSION_MAJOR;
+	result.version[1] = DLM_DEVICE_VERSION_MINOR;
+	result.version[2] = DLM_DEVICE_VERSION_PATCH;
 	memcpy(&result.lksb, &ua->lksb, sizeof(struct dlm_lksb));
 	result.user_lksb = ua->user_lksb;
 
@@ -699,6 +748,20 @@ static int copy_result_to_user(struct dlm_user_args *ua, int compat, int type,
 	return error;
 }
 
+static int copy_version_to_user(char __user *buf, size_t count)
+{
+	struct dlm_device_version ver;
+
+	memset(&ver, 0, sizeof(struct dlm_device_version));
+	ver.version[0] = DLM_DEVICE_VERSION_MAJOR;
+	ver.version[1] = DLM_DEVICE_VERSION_MINOR;
+	ver.version[2] = DLM_DEVICE_VERSION_PATCH;
+
+	if (copy_to_user(buf, &ver, sizeof(struct dlm_device_version)))
+		return -EFAULT;
+	return sizeof(struct dlm_device_version);
+}
+
 /* a read returns a single ast described in a struct dlm_lock_result */
 
 static ssize_t device_read(struct file *file, char __user *buf, size_t count,
@@ -710,6 +773,16 @@ static ssize_t device_read(struct file *file, char __user *buf, size_t count,
 	DECLARE_WAITQUEUE(wait, current);
 	int error, type=0, bmode=0, removed = 0;
 
+	if (count == sizeof(struct dlm_device_version)) {
+		error = copy_version_to_user(buf, count);
+		return error;
+	}
+
+	if (!proc) {
+		log_print("non-version read from control device %zu", count);
+		return -EINVAL;
+	}
+
 #ifdef CONFIG_COMPAT
 	if (count < sizeof(struct dlm_lock_result32))
 #else
@@ -747,11 +820,6 @@ static ssize_t device_read(struct file *file, char __user *buf, size_t count,
 		}
 	}
 
-	if (list_empty(&proc->asts)) {
-		spin_unlock(&proc->asts_spin);
-		return -EAGAIN;
-	}
-
 	/* there may be both completion and blocking asts to return for
 	   the lkb, don't remove lkb from asts list unless no asts remain */
 
@@ -823,6 +891,7 @@ static const struct file_operations device_fops = {
 static const struct file_operations ctl_device_fops = {
 	.open    = ctl_device_open,
 	.release = ctl_device_close,
+	.read    = device_read,
 	.write   = device_write,
 	.owner   = THIS_MODULE,
 };
diff --git a/fs/dquot.c b/fs/dquot.c
index 8819d28..7e27315 100644
--- a/fs/dquot.c
+++ b/fs/dquot.c
@@ -538,6 +538,11 @@ static int shrink_dqcache_memory(int nr, gfp_t gfp_mask)
 	return (dqstats.free_dquots / 100) * sysctl_vfs_cache_pressure;
 }
 
+static struct shrinker dqcache_shrinker = {
+	.shrink = shrink_dqcache_memory,
+	.seeks = DEFAULT_SEEKS,
+};
+
 /*
  * Put reference to dquot
  * NOTE: If you change this function please check whether dqput_blocks() works right...
@@ -1870,7 +1875,7 @@ static int __init dquot_init(void)
 	printk("Dquot-cache hash table entries: %ld (order %ld, %ld bytes)\n",
 			nr_hash, order, (PAGE_SIZE << order));
 
-	set_shrinker(DEFAULT_SEEKS, shrink_dqcache_memory);
+	register_shrinker(&dqcache_shrinker);
 
 	return 0;
 }
diff --git a/fs/drop_caches.c b/fs/drop_caches.c
index 03ea769..59375ef 100644
--- a/fs/drop_caches.c
+++ b/fs/drop_caches.c
@@ -20,7 +20,7 @@ static void drop_pagecache_sb(struct super_block *sb)
 	list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
 		if (inode->i_state & (I_FREEING|I_WILL_FREE))
 			continue;
-		invalidate_mapping_pages(inode->i_mapping, 0, -1);
+		__invalidate_mapping_pages(inode->i_mapping, 0, -1, true);
 	}
 	spin_unlock(&inode_lock);
 }
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index 403e3ba..1b9dd9a 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -580,5 +580,7 @@ void
 ecryptfs_write_header_metadata(char *virt,
 			       struct ecryptfs_crypt_stat *crypt_stat,
 			       size_t *written);
+int ecryptfs_write_zeros(struct file *file, pgoff_t index, int start,
+			 int num_zeros);
 
 #endif /* #ifndef ECRYPTFS_KERNEL_H */
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 59288d8..94f456f 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -338,16 +338,17 @@ static int ecryptfs_fasync(int fd, struct file *file, int flag)
 	return rc;
 }
 
-static ssize_t ecryptfs_sendfile(struct file *file, loff_t * ppos,
-				 size_t count, read_actor_t actor, void *target)
+static ssize_t ecryptfs_splice_read(struct file *file, loff_t * ppos,
+				    struct pipe_inode_info *pipe, size_t count,
+				    unsigned int flags)
 {
 	struct file *lower_file = NULL;
 	int rc = -EINVAL;
 
 	lower_file = ecryptfs_file_to_lower(file);
-	if (lower_file->f_op && lower_file->f_op->sendfile)
-		rc = lower_file->f_op->sendfile(lower_file, ppos, count,
-						actor, target);
+	if (lower_file->f_op && lower_file->f_op->splice_read)
+		rc = lower_file->f_op->splice_read(lower_file, ppos, pipe,
+						count, flags);
 
 	return rc;
 }
@@ -364,7 +365,7 @@ const struct file_operations ecryptfs_dir_fops = {
 	.release = ecryptfs_release,
 	.fsync = ecryptfs_fsync,
 	.fasync = ecryptfs_fasync,
-	.sendfile = ecryptfs_sendfile,
+	.splice_read = ecryptfs_splice_read,
 };
 
 const struct file_operations ecryptfs_main_fops = {
@@ -381,7 +382,7 @@ const struct file_operations ecryptfs_main_fops = {
 	.release = ecryptfs_release,
 	.fsync = ecryptfs_fsync,
 	.fasync = ecryptfs_fasync,
-	.sendfile = ecryptfs_sendfile,
+	.splice_read = ecryptfs_splice_read,
 };
 
 static int
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 1548be2..e77a2ec 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -282,7 +282,7 @@ static struct dentry *ecryptfs_lookup(struct inode *dir, struct dentry *dentry,
 	struct dentry *lower_dentry;
 	struct vfsmount *lower_mnt;
 	char *encoded_name;
-	unsigned int encoded_namelen;
+	int encoded_namelen;
 	struct ecryptfs_crypt_stat *crypt_stat = NULL;
 	struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
 	char *page_virt = NULL;
@@ -473,7 +473,7 @@ static int ecryptfs_symlink(struct inode *dir, struct dentry *dentry,
 	struct dentry *lower_dir_dentry;
 	umode_t mode;
 	char *encoded_symname;
-	unsigned int encoded_symlen;
+	int encoded_symlen;
 	struct ecryptfs_crypt_stat *crypt_stat = NULL;
 
 	lower_dentry = ecryptfs_dentry_to_lower(dentry);
@@ -800,6 +800,25 @@ int ecryptfs_truncate(struct dentry *dentry, loff_t new_length)
 			goto out_fput;
 		}
 	} else { /* new_length < i_size_read(inode) */
+		pgoff_t index = 0;
+		int end_pos_in_page = -1;
+
+		if (new_length != 0) {
+			index = ((new_length - 1) >> PAGE_CACHE_SHIFT);
+			end_pos_in_page = ((new_length - 1) & ~PAGE_CACHE_MASK);
+		}
+		if (end_pos_in_page != (PAGE_CACHE_SIZE - 1)) {
+			if ((rc = ecryptfs_write_zeros(&fake_ecryptfs_file,
+						       index,
+						       (end_pos_in_page + 1),
+						       ((PAGE_CACHE_SIZE - 1)
+							- end_pos_in_page)))) {
+				printk(KERN_ERR "Error attempting to zero out "
+				       "the remainder of the end page on "
+				       "reducing truncate; rc = [%d]\n", rc);
+				goto out_fput;
+			}
+		}
 		vmtruncate(inode, new_length);
 		rc = ecryptfs_write_inode_size_to_metadata(
 			lower_file, lower_dentry->d_inode, inode, dentry,
@@ -875,9 +894,54 @@ static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
 	struct ecryptfs_crypt_stat *crypt_stat;
 
 	crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
-	lower_dentry = ecryptfs_dentry_to_lower(dentry);
+	if (!(crypt_stat->flags & ECRYPTFS_STRUCT_INITIALIZED))
+		ecryptfs_init_crypt_stat(crypt_stat);
 	inode = dentry->d_inode;
 	lower_inode = ecryptfs_inode_to_lower(inode);
+	lower_dentry = ecryptfs_dentry_to_lower(dentry);
+	mutex_lock(&crypt_stat->cs_mutex);
+	if (S_ISDIR(dentry->d_inode->i_mode))
+		crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
+	else if (!(crypt_stat->flags & ECRYPTFS_POLICY_APPLIED)
+		 || !(crypt_stat->flags & ECRYPTFS_KEY_VALID)) {
+		struct vfsmount *lower_mnt;
+		struct file *lower_file = NULL;
+		struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
+		int lower_flags;
+
+		lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
+		lower_flags = O_RDONLY;
+		if ((rc = ecryptfs_open_lower_file(&lower_file, lower_dentry,
+						   lower_mnt, lower_flags))) {
+			printk(KERN_ERR
+			       "Error opening lower file; rc = [%d]\n", rc);
+			mutex_unlock(&crypt_stat->cs_mutex);
+			goto out;
+		}
+		mount_crypt_stat = &ecryptfs_superblock_to_private(
+			dentry->d_sb)->mount_crypt_stat;
+		if ((rc = ecryptfs_read_metadata(dentry, lower_file))) {
+			if (!(mount_crypt_stat->flags
+			      & ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED)) {
+				rc = -EIO;
+				printk(KERN_WARNING "Attempt to read file that "
+				       "is not in a valid eCryptfs format, "
+				       "and plaintext passthrough mode is not "
+				       "enabled; returning -EIO\n");
+
+				mutex_unlock(&crypt_stat->cs_mutex);
+				fput(lower_file);
+				goto out;
+			}
+			rc = 0;
+			crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
+			mutex_unlock(&crypt_stat->cs_mutex);
+			fput(lower_file);
+			goto out;
+		}
+		fput(lower_file);
+	}
+	mutex_unlock(&crypt_stat->cs_mutex);
 	if (ia->ia_valid & ATTR_SIZE) {
 		ecryptfs_printk(KERN_DEBUG,
 				"ia->ia_valid = [0x%x] ATTR_SIZE" " = [0x%x]\n",
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 606128f..02ca6f1 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -840,8 +840,6 @@ static int __init ecryptfs_init(void)
 		goto out;
 	}
 	kobj_set_kset_s(&ecryptfs_subsys, fs_subsys);
-	sysfs_attr_version.attr.owner = THIS_MODULE;
-	sysfs_attr_version_str.attr.owner = THIS_MODULE;
 	rc = do_sysfs_registration();
 	if (rc) {
 		printk(KERN_ERR "sysfs registration failed\n");
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 55cec98..7d5a43c 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -56,9 +56,6 @@ static struct page *ecryptfs_get1page(struct file *file, int index)
 	return read_mapping_page(mapping, index, (void *)file);
 }
 
-static
-int write_zeros(struct file *file, pgoff_t index, int start, int num_zeros);
-
 /**
  * ecryptfs_fill_zeros
  * @file: The ecryptfs file
@@ -101,10 +98,13 @@ int ecryptfs_fill_zeros(struct file *file, loff_t new_length)
 	if (old_end_page_index == new_end_page_index) {
 		/* Start and end are in the same page; we just need to
 		 * set a portion of the existing page to zero's */
-		rc = write_zeros(file, index, (old_end_pos_in_page + 1),
-				 (new_end_pos_in_page - old_end_pos_in_page));
+		rc = ecryptfs_write_zeros(file, index,
+					  (old_end_pos_in_page + 1),
+					  (new_end_pos_in_page
+					   - old_end_pos_in_page));
 		if (rc)
-			ecryptfs_printk(KERN_ERR, "write_zeros(file=[%p], "
+			ecryptfs_printk(KERN_ERR, "ecryptfs_write_zeros("
+					"file=[%p], "
 					"index=[0x%.16x], "
 					"old_end_pos_in_page=[d], "
 					"(PAGE_CACHE_SIZE - new_end_pos_in_page"
@@ -117,10 +117,10 @@ int ecryptfs_fill_zeros(struct file *file, loff_t new_length)
 		goto out;
 	}
 	/* Fill the remainder of the previous last page with zeros */
-	rc = write_zeros(file, index, (old_end_pos_in_page + 1),
+	rc = ecryptfs_write_zeros(file, index, (old_end_pos_in_page + 1),
 			 ((PAGE_CACHE_SIZE - 1) - old_end_pos_in_page));
 	if (rc) {
-		ecryptfs_printk(KERN_ERR, "write_zeros(file=[%p], "
+		ecryptfs_printk(KERN_ERR, "ecryptfs_write_zeros(file=[%p], "
 				"index=[0x%.16x], old_end_pos_in_page=[d], "
 				"(PAGE_CACHE_SIZE - old_end_pos_in_page)=[d]) "
 				"returned [%d]\n", file, index,
@@ -131,9 +131,10 @@ int ecryptfs_fill_zeros(struct file *file, loff_t new_length)
 	index++;
 	while (index < new_end_page_index) {
 		/* Fill all intermediate pages with zeros */
-		rc = write_zeros(file, index, 0, PAGE_CACHE_SIZE);
+		rc = ecryptfs_write_zeros(file, index, 0, PAGE_CACHE_SIZE);
 		if (rc) {
-			ecryptfs_printk(KERN_ERR, "write_zeros(file=[%p], "
+			ecryptfs_printk(KERN_ERR, "ecryptfs_write_zeros("
+					"file=[%p], "
 					"index=[0x%.16x], "
 					"old_end_pos_in_page=[d], "
 					"(PAGE_CACHE_SIZE - new_end_pos_in_page"
@@ -149,9 +150,9 @@ int ecryptfs_fill_zeros(struct file *file, loff_t new_length)
 	}
 	/* Fill the portion at the beginning of the last new page with
 	 * zero's */
-	rc = write_zeros(file, index, 0, (new_end_pos_in_page + 1));
+	rc = ecryptfs_write_zeros(file, index, 0, (new_end_pos_in_page + 1));
 	if (rc) {
-		ecryptfs_printk(KERN_ERR, "write_zeros(file="
+		ecryptfs_printk(KERN_ERR, "ecryptfs_write_zeros(file="
 				"[%p], index=[0x%.16x], 0, "
 				"new_end_pos_in_page=[%d]"
 				"returned [%d]\n", file, index,
@@ -400,7 +401,6 @@ out:
 static int ecryptfs_prepare_write(struct file *file, struct page *page,
 				  unsigned from, unsigned to)
 {
-	loff_t pos;
 	int rc = 0;
 
 	if (from == 0 && to == PAGE_CACHE_SIZE)
@@ -408,15 +408,22 @@ static int ecryptfs_prepare_write(struct file *file, struct page *page,
 				   up to date. */
 	if (!PageUptodate(page))
 		rc = ecryptfs_do_readpage(file, page, page->index);
-	pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
-	if (pos > i_size_read(page->mapping->host)) {
-		rc = ecryptfs_truncate(file->f_path.dentry, pos);
-		if (rc) {
-			printk(KERN_ERR "Error on attempt to "
-			       "truncate to (higher) offset [%lld];"
-			       " rc = [%d]\n", pos, rc);
-			goto out;
+	if (page->index != 0) {
+		loff_t end_of_prev_pg_pos =
+			(((loff_t)page->index << PAGE_CACHE_SHIFT) - 1);
+
+		if (end_of_prev_pg_pos > i_size_read(page->mapping->host)) {
+			rc = ecryptfs_truncate(file->f_path.dentry,
+					       end_of_prev_pg_pos);
+			if (rc) {
+				printk(KERN_ERR "Error on attempt to "
+				       "truncate to (higher) offset [%lld];"
+				       " rc = [%d]\n", end_of_prev_pg_pos, rc);
+				goto out;
+			}
 		}
+		if (end_of_prev_pg_pos + 1 > i_size_read(page->mapping->host))
+			zero_user_page(page, 0, PAGE_CACHE_SIZE, KM_USER0);
 	}
 out:
 	return rc;
@@ -753,7 +760,7 @@ out:
 }
 
 /**
- * write_zeros
+ * ecryptfs_write_zeros
  * @file: The ecryptfs file
  * @index: The index in which we are writing
  * @start: The position after the last block of data
@@ -763,8 +770,8 @@ out:
  *
  * (start + num_zeros) must be less than or equal to PAGE_CACHE_SIZE
  */
-static
-int write_zeros(struct file *file, pgoff_t index, int start, int num_zeros)
+int
+ecryptfs_write_zeros(struct file *file, pgoff_t index, int start, int num_zeros)
 {
 	int rc = 0;
 	struct page *tmp_page;
diff --git a/fs/efs/namei.c b/fs/efs/namei.c
index ed4a207..5276b19 100644
--- a/fs/efs/namei.c
+++ b/fs/efs/namei.c
@@ -75,6 +75,38 @@ struct dentry *efs_lookup(struct inode *dir, struct dentry *dentry, struct namei
 	return NULL;
 }
 
+struct dentry *efs_get_dentry(struct super_block *sb, void *vobjp)
+{
+	__u32 *objp = vobjp;
+	unsigned long ino = objp[0];
+	__u32 generation = objp[1];
+	struct inode *inode;
+	struct dentry *result;
+
+	if (ino == 0)
+		return ERR_PTR(-ESTALE);
+	inode = iget(sb, ino);
+	if (inode == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	if (is_bad_inode(inode) ||
+	    (generation && inode->i_generation != generation)) {
+	    	result = ERR_PTR(-ESTALE);
+		goto out_iput;
+	}
+
+	result = d_alloc_anon(inode);
+	if (!result) {
+		result = ERR_PTR(-ENOMEM);
+		goto out_iput;
+	}
+	return result;
+
+ out_iput:
+	iput(inode);
+	return result;
+}
+
 struct dentry *efs_get_parent(struct dentry *child)
 {
 	struct dentry *parent;
diff --git a/fs/efs/super.c b/fs/efs/super.c
index e0a6839..d360c81 100644
--- a/fs/efs/super.c
+++ b/fs/efs/super.c
@@ -11,6 +11,7 @@
 #include <linux/efs_fs.h>
 #include <linux/efs_vh.h>
 #include <linux/efs_fs_sb.h>
+#include <linux/exportfs.h>
 #include <linux/slab.h>
 #include <linux/buffer_head.h>
 #include <linux/vfs.h>
@@ -113,6 +114,7 @@ static const struct super_operations efs_superblock_operations = {
 };
 
 static struct export_operations efs_export_ops = {
+	.get_dentry	= efs_get_dentry,
 	.get_parent	= efs_get_parent,
 };
 
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index e98f6cd..8adb32a 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -1,15 +1,45 @@
 
+#include <linux/exportfs.h>
 #include <linux/fs.h>
 #include <linux/file.h>
 #include <linux/module.h>
+#include <linux/mount.h>
 #include <linux/namei.h>
 
-struct export_operations export_op_default;
+#define dprintk(fmt, args...) do{}while(0)
 
-#define	CALL(ops,fun) ((ops->fun)?(ops->fun):export_op_default.fun)
 
-#define dprintk(fmt, args...) do{}while(0)
+static int get_name(struct dentry *dentry, char *name,
+		struct dentry *child);
+
+
+static struct dentry *exportfs_get_dentry(struct super_block *sb, void *obj)
+{
+	struct dentry *result = ERR_PTR(-ESTALE);
+
+	if (sb->s_export_op->get_dentry) {
+		result = sb->s_export_op->get_dentry(sb, obj);
+		if (!result)
+			result = ERR_PTR(-ESTALE);
+	}
+
+	return result;
+}
+
+static int exportfs_get_name(struct dentry *dir, char *name,
+		struct dentry *child)
+{
+	struct export_operations *nop = dir->d_sb->s_export_op;
 
+	if (nop->get_name)
+		return nop->get_name(dir, name, child);
+	else
+		return get_name(dir, name, child);
+}
+
+/*
+ * Check if the dentry or any of it's aliases is acceptable.
+ */
 static struct dentry *
 find_acceptable_alias(struct dentry *result,
 		int (*acceptable)(void *context, struct dentry *dentry),
@@ -17,6 +47,9 @@ find_acceptable_alias(struct dentry *result,
 {
 	struct dentry *dentry, *toput = NULL;
 
+	if (acceptable(context, result))
+		return result;
+
 	spin_lock(&dcache_lock);
 	list_for_each_entry(dentry, &result->d_inode->i_dentry, d_alias) {
 		dget_locked(dentry);
@@ -37,130 +70,50 @@ find_acceptable_alias(struct dentry *result,
 	return NULL;
 }
 
-/**
- * find_exported_dentry - helper routine to implement export_operations->decode_fh
- * @sb:		The &super_block identifying the filesystem
- * @obj:	An opaque identifier of the object to be found - passed to
- *		get_inode
- * @parent:	An optional opqaue identifier of the parent of the object.
- * @acceptable:	A function used to test possible &dentries to see if they are
- *		acceptable
- * @context:	A parameter to @acceptable so that it knows on what basis to
- *		judge.
- *
- * find_exported_dentry is the central helper routine to enable file systems
- * to provide the decode_fh() export_operation.  It's main task is to take
- * an &inode, find or create an appropriate &dentry structure, and possibly
- * splice this into the dcache in the correct place.
- *
- * The decode_fh() operation provided by the filesystem should call
- * find_exported_dentry() with the same parameters that it received except
- * that instead of the file handle fragment, pointers to opaque identifiers
- * for the object and optionally its parent are passed.  The default decode_fh
- * routine passes one pointer to the start of the filehandle fragment, and
- * one 8 bytes into the fragment.  It is expected that most filesystems will
- * take this approach, though the offset to the parent identifier may well be
- * different.
- *
- * find_exported_dentry() will call get_dentry to get an dentry pointer from
- * the file system.  If any &dentry in the d_alias list is acceptable, it will
- * be returned.  Otherwise find_exported_dentry() will attempt to splice a new
- * &dentry into the dcache using get_name() and get_parent() to find the
- * appropriate place.
+/*
+ * Find root of a disconnected subtree and return a reference to it.
  */
-
-struct dentry *
-find_exported_dentry(struct super_block *sb, void *obj, void *parent,
-		     int (*acceptable)(void *context, struct dentry *de),
-		     void *context)
+static struct dentry *
+find_disconnected_root(struct dentry *dentry)
 {
-	struct dentry *result = NULL;
-	struct dentry *target_dir;
-	int err;
-	struct export_operations *nops = sb->s_export_op;
-	struct dentry *alias;
-	int noprogress;
-	char nbuf[NAME_MAX+1];
-
-	/*
-	 * Attempt to find the inode.
-	 */
-	result = CALL(sb->s_export_op,get_dentry)(sb,obj);
-	err = -ESTALE;
-	if (result == NULL)
-		goto err_out;
-	if (IS_ERR(result)) {
-		err = PTR_ERR(result);
-		goto err_out;
+	dget(dentry);
+	spin_lock(&dentry->d_lock);
+	while (!IS_ROOT(dentry) &&
+	       (dentry->d_parent->d_flags & DCACHE_DISCONNECTED)) {
+		struct dentry *parent = dentry->d_parent;
+		dget(parent);
+		spin_unlock(&dentry->d_lock);
+		dput(dentry);
+		dentry = parent;
+		spin_lock(&dentry->d_lock);
 	}
-	if (S_ISDIR(result->d_inode->i_mode) &&
-	    (result->d_flags & DCACHE_DISCONNECTED)) {
-		/* it is an unconnected directory, we must connect it */
-		;
-	} else {
-		if (acceptable(context, result))
-			return result;
-		if (S_ISDIR(result->d_inode->i_mode)) {
-			err = -EACCES;
-			goto err_result;
-		}
+	spin_unlock(&dentry->d_lock);
+	return dentry;
+}
 
-		alias = find_acceptable_alias(result, acceptable, context);
-		if (alias)
-			return alias;
-	}			
-
-	/* It's a directory, or we are required to confirm the file's
-	 * location in the tree based on the parent information
- 	 */
-	dprintk("find_exported_dentry: need to look harder for %s/%d\n",sb->s_id,*(int*)obj);
-	if (S_ISDIR(result->d_inode->i_mode))
-		target_dir = dget(result);
-	else {
-		if (parent == NULL)
-			goto err_result;
 
-		target_dir = CALL(sb->s_export_op,get_dentry)(sb,parent);
-		if (IS_ERR(target_dir))
-			err = PTR_ERR(target_dir);
-		if (target_dir == NULL || IS_ERR(target_dir))
-			goto err_result;
-	}
-	/*
-	 * Now we need to make sure that target_dir is properly connected.
-	 * It may already be, as the flag isn't always updated when connection
-	 * happens.
-	 * So, we walk up parent links until we find a connected directory,
-	 * or we run out of directories.  Then we find the parent, find
-	 * the name of the child in that parent, and do a lookup.
-	 * This should connect the child into the parent
-	 * We then repeat.
-	 */
+/*
+ * Make sure target_dir is fully connected to the dentry tree.
+ *
+ * It may already be, as the flag isn't always updated when connection happens.
+ */
+static int
+reconnect_path(struct super_block *sb, struct dentry *target_dir)
+{
+	char nbuf[NAME_MAX+1];
+	int noprogress = 0;
+	int err = -ESTALE;
 
-	/* it is possible that a confused file system might not let us complete 
+	/*
+	 * It is possible that a confused file system might not let us complete
 	 * the path to the root.  For example, if get_parent returns a directory
 	 * in which we cannot find a name for the child.  While this implies a
 	 * very sick filesystem we don't want it to cause knfsd to spin.  Hence
 	 * the noprogress counter.  If we go through the loop 10 times (2 is
 	 * probably enough) without getting anywhere, we just give up
 	 */
-	noprogress= 0;
 	while (target_dir->d_flags & DCACHE_DISCONNECTED && noprogress++ < 10) {
-		struct dentry *pd = target_dir;
-
-		dget(pd);
-		spin_lock(&pd->d_lock);
-		while (!IS_ROOT(pd) &&
-				(pd->d_parent->d_flags&DCACHE_DISCONNECTED)) {
-			struct dentry *parent = pd->d_parent;
-
-			dget(parent);
-			spin_unlock(&pd->d_lock);
-			dput(pd);
-			pd = parent;
-			spin_lock(&pd->d_lock);
-		}
-		spin_unlock(&pd->d_lock);
+		struct dentry *pd = find_disconnected_root(target_dir);
 
 		if (!IS_ROOT(pd)) {
 			/* must have found a connected parent - great */
@@ -175,29 +128,40 @@ find_exported_dentry(struct super_block *sb, void *obj, void *parent,
 			spin_unlock(&pd->d_lock);
 			noprogress = 0;
 		} else {
-			/* we have hit the top of a disconnected path.  Try
-			 * to find parent and connect
-			 * note: racing with some other process renaming a
-			 * directory isn't much of a problem here.  If someone
-			 * renames the directory, it will end up properly
-			 * connected, which is what we want
+			/*
+			 * We have hit the top of a disconnected path, try to
+			 * find parent and connect.
+			 *
+			 * Racing with some other process renaming a directory
+			 * isn't much of a problem here.  If someone renames
+			 * the directory, it will end up properly connected,
+			 * which is what we want
+			 *
+			 * Getting the parent can't be supported generically,
+			 * the locking is too icky.
+			 *
+			 * Instead we just return EACCES.  If server reboots
+			 * or inodes get flushed, you lose
 			 */
-			struct dentry *ppd;
+			struct dentry *ppd = ERR_PTR(-EACCES);
 			struct dentry *npd;
 
 			mutex_lock(&pd->d_inode->i_mutex);
-			ppd = CALL(nops,get_parent)(pd);
+			if (sb->s_export_op->get_parent)
+				ppd = sb->s_export_op->get_parent(pd);
 			mutex_unlock(&pd->d_inode->i_mutex);
 
 			if (IS_ERR(ppd)) {
 				err = PTR_ERR(ppd);
-				dprintk("find_exported_dentry: get_parent of %ld failed, err %d\n",
-					pd->d_inode->i_ino, err);
+				dprintk("%s: get_parent of %ld failed, err %d\n",
+					__FUNCTION__, pd->d_inode->i_ino, err);
 				dput(pd);
 				break;
 			}
-			dprintk("find_exported_dentry: find name of %lu in %lu\n", pd->d_inode->i_ino, ppd->d_inode->i_ino);
-			err = CALL(nops,get_name)(ppd, nbuf, pd);
+
+			dprintk("%s: find name of %lu in %lu\n", __FUNCTION__,
+				pd->d_inode->i_ino, ppd->d_inode->i_ino);
+			err = exportfs_get_name(ppd, nbuf, pd);
 			if (err) {
 				dput(ppd);
 				dput(pd);
@@ -208,13 +172,14 @@ find_exported_dentry(struct super_block *sb, void *obj, void *parent,
 					continue;
 				break;
 			}
-			dprintk("find_exported_dentry: found name: %s\n", nbuf);
+			dprintk("%s: found name: %s\n", __FUNCTION__, nbuf);
 			mutex_lock(&ppd->d_inode->i_mutex);
 			npd = lookup_one_len(nbuf, ppd, strlen(nbuf));
 			mutex_unlock(&ppd->d_inode->i_mutex);
 			if (IS_ERR(npd)) {
 				err = PTR_ERR(npd);
-				dprintk("find_exported_dentry: lookup failed: %d\n", err);
+				dprintk("%s: lookup failed: %d\n",
+					__FUNCTION__, err);
 				dput(ppd);
 				dput(pd);
 				break;
@@ -227,7 +192,7 @@ find_exported_dentry(struct super_block *sb, void *obj, void *parent,
 			if (npd == pd)
 				noprogress = 0;
 			else
-				printk("find_exported_dentry: npd != pd\n");
+				printk("%s: npd != pd\n", __FUNCTION__);
 			dput(npd);
 			dput(ppd);
 			if (IS_ROOT(pd)) {
@@ -243,15 +208,101 @@ find_exported_dentry(struct super_block *sb, void *obj, void *parent,
 		/* something went wrong - oh-well */
 		if (!err)
 			err = -ESTALE;
-		goto err_target;
+		return err;
 	}
-	/* if we weren't after a directory, have one more step to go */
-	if (result != target_dir) {
-		struct dentry *nresult;
-		err = CALL(nops,get_name)(target_dir, nbuf, result);
+
+	return 0;
+}
+
+/**
+ * find_exported_dentry - helper routine to implement export_operations->decode_fh
+ * @sb:		The &super_block identifying the filesystem
+ * @obj:	An opaque identifier of the object to be found - passed to
+ *		get_inode
+ * @parent:	An optional opqaue identifier of the parent of the object.
+ * @acceptable:	A function used to test possible &dentries to see if they are
+ *		acceptable
+ * @context:	A parameter to @acceptable so that it knows on what basis to
+ *		judge.
+ *
+ * find_exported_dentry is the central helper routine to enable file systems
+ * to provide the decode_fh() export_operation.  It's main task is to take
+ * an &inode, find or create an appropriate &dentry structure, and possibly
+ * splice this into the dcache in the correct place.
+ *
+ * The decode_fh() operation provided by the filesystem should call
+ * find_exported_dentry() with the same parameters that it received except
+ * that instead of the file handle fragment, pointers to opaque identifiers
+ * for the object and optionally its parent are passed.  The default decode_fh
+ * routine passes one pointer to the start of the filehandle fragment, and
+ * one 8 bytes into the fragment.  It is expected that most filesystems will
+ * take this approach, though the offset to the parent identifier may well be
+ * different.
+ *
+ * find_exported_dentry() will call get_dentry to get an dentry pointer from
+ * the file system.  If any &dentry in the d_alias list is acceptable, it will
+ * be returned.  Otherwise find_exported_dentry() will attempt to splice a new
+ * &dentry into the dcache using get_name() and get_parent() to find the
+ * appropriate place.
+ */
+
+struct dentry *
+find_exported_dentry(struct super_block *sb, void *obj, void *parent,
+		     int (*acceptable)(void *context, struct dentry *de),
+		     void *context)
+{
+	struct dentry *result, *alias;
+	int err = -ESTALE;
+
+	/*
+	 * Attempt to find the inode.
+	 */
+	result = exportfs_get_dentry(sb, obj);
+	if (IS_ERR(result))
+		return result;
+
+	if (S_ISDIR(result->d_inode->i_mode)) {
+		if (!(result->d_flags & DCACHE_DISCONNECTED)) {
+			if (acceptable(context, result))
+				return result;
+			err = -EACCES;
+			goto err_result;
+		}
+
+		err = reconnect_path(sb, result);
+		if (err)
+			goto err_result;
+	} else {
+		struct dentry *target_dir, *nresult;
+		char nbuf[NAME_MAX+1];
+
+		alias = find_acceptable_alias(result, acceptable, context);
+		if (alias)
+			return alias;
+
+		if (parent == NULL)
+			goto err_result;
+
+		target_dir = exportfs_get_dentry(sb,parent);
+		if (IS_ERR(target_dir)) {
+			err = PTR_ERR(target_dir);
+			goto err_result;
+		}
+
+		err = reconnect_path(sb, target_dir);
+		if (err) {
+			dput(target_dir);
+			goto err_result;
+		}
+
+		/*
+		 * As we weren't after a directory, have one more step to go.
+		 */
+		err = exportfs_get_name(target_dir, nbuf, result);
 		if (!err) {
 			mutex_lock(&target_dir->d_inode->i_mutex);
-			nresult = lookup_one_len(nbuf, target_dir, strlen(nbuf));
+			nresult = lookup_one_len(nbuf, target_dir,
+						 strlen(nbuf));
 			mutex_unlock(&target_dir->d_inode->i_mutex);
 			if (!IS_ERR(nresult)) {
 				if (nresult->d_inode) {
@@ -261,11 +312,8 @@ find_exported_dentry(struct super_block *sb, void *obj, void *parent,
 					dput(nresult);
 			}
 		}
+		dput(target_dir);
 	}
-	dput(target_dir);
-	/* now result is properly connected, it is our best bet */
-	if (acceptable(context, result))
-		return result;
 
 	alias = find_acceptable_alias(result, acceptable, context);
 	if (alias)
@@ -275,32 +323,16 @@ find_exported_dentry(struct super_block *sb, void *obj, void *parent,
 	dput(result);
 	/* It might be justifiable to return ESTALE here,
 	 * but the filehandle at-least looks reasonable good
-	 * and it just be a permission problem, so returning
+	 * and it may just be a permission problem, so returning
 	 * -EACCESS is safer
 	 */
 	return ERR_PTR(-EACCES);
 
- err_target:
-	dput(target_dir);
  err_result:
 	dput(result);
- err_out:
 	return ERR_PTR(err);
 }
 
-
-
-static struct dentry *get_parent(struct dentry *child)
-{
-	/* get_parent cannot be supported generically, the locking
-	 * is too icky.
-	 * instead, we just return EACCES.  If server reboots or inodes
-	 * get flushed, you lose
-	 */
-	return ERR_PTR(-EACCES);
-}
-
-
 struct getdents_callback {
 	char *name;		/* name that was found. It already points to a
 				   buffer NAME_MAX+1 is size */
@@ -390,61 +422,6 @@ out:
 	return error;
 }
 
-
-static struct dentry *export_iget(struct super_block *sb, unsigned long ino, __u32 generation)
-{
-
-	/* iget isn't really right if the inode is currently unallocated!!
-	 * This should really all be done inside each filesystem
-	 *
-	 * ext2fs' read_inode has been strengthed to return a bad_inode if
-	 * the inode had been deleted.
-	 *
-	 * Currently we don't know the generation for parent directory, so
-	 * a generation of 0 means "accept any"
-	 */
-	struct inode *inode;
-	struct dentry *result;
-	if (ino == 0)
-		return ERR_PTR(-ESTALE);
-	inode = iget(sb, ino);
-	if (inode == NULL)
-		return ERR_PTR(-ENOMEM);
-	if (is_bad_inode(inode)
-	    || (generation && inode->i_generation != generation)
-		) {
-		/* we didn't find the right inode.. */
-		dprintk("fh_verify: Inode %lu, Bad count: %d %d or version  %u %u\n",
-			inode->i_ino,
-			inode->i_nlink, atomic_read(&inode->i_count),
-			inode->i_generation,
-			generation);
-
-		iput(inode);
-		return ERR_PTR(-ESTALE);
-	}
-	/* now to find a dentry.
-	 * If possible, get a well-connected one
-	 */
-	result = d_alloc_anon(inode);
-	if (!result) {
-		iput(inode);
-		return ERR_PTR(-ENOMEM);
-	}
-	return result;
-}
-
-
-static struct dentry *get_object(struct super_block *sb, void *vobjp)
-{
-	__u32 *objp = vobjp;
-	unsigned long ino = objp[0];
-	__u32 generation = objp[1];
-
-	return export_iget(sb, ino, generation);
-}
-
-
 /**
  * export_encode_fh - default export_operations->encode_fh function
  * @dentry:  the dentry to encode
@@ -517,16 +494,40 @@ static struct dentry *export_decode_fh(struct super_block *sb, __u32 *fh, int fh
 				   acceptable, context);
 }
 
-struct export_operations export_op_default = {
-	.decode_fh	= export_decode_fh,
-	.encode_fh	= export_encode_fh,
+int exportfs_encode_fh(struct dentry *dentry, __u32 *fh, int *max_len,
+		int connectable)
+{
+ 	struct export_operations *nop = dentry->d_sb->s_export_op;
+	int error;
+
+	if (nop->encode_fh)
+		error = nop->encode_fh(dentry, fh, max_len, connectable);
+	else
+		error = export_encode_fh(dentry, fh, max_len, connectable);
 
-	.get_name	= get_name,
-	.get_parent	= get_parent,
-	.get_dentry	= get_object,
-};
+	return error;
+}
+EXPORT_SYMBOL_GPL(exportfs_encode_fh);
+
+struct dentry *exportfs_decode_fh(struct vfsmount *mnt, __u32 *fh, int fh_len,
+		int fileid_type, int (*acceptable)(void *, struct dentry *),
+		void *context)
+{
+	struct export_operations *nop = mnt->mnt_sb->s_export_op;
+	struct dentry *result;
+
+	if (nop->decode_fh) {
+		result = nop->decode_fh(mnt->mnt_sb, fh, fh_len, fileid_type,
+			acceptable, context);
+	} else {
+		result = export_decode_fh(mnt->mnt_sb, fh, fh_len, fileid_type,
+			acceptable, context);
+	}
+
+	return result;
+}
+EXPORT_SYMBOL_GPL(exportfs_decode_fh);
 
-EXPORT_SYMBOL(export_op_default);
 EXPORT_SYMBOL(find_exported_dentry);
 
 MODULE_LICENSE("GPL");
diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index 7c420b8..e58669e 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -464,7 +464,7 @@ ext2_xattr_set_acl(struct inode *inode, int type, const void *value,
 
 	if (!test_opt(inode->i_sb, POSIX_ACL))
 		return -EOPNOTSUPP;
-	if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+	if (!is_owner_or_cap(inode))
 		return -EPERM;
 
 	if (value) {
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index 566d4e2..ab79612 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -24,9 +24,9 @@
 #include "acl.h"
 
 /*
- * Called when an inode is released. Note that this is different
- * from ext2_open_file: open gets called at every open, but release
- * gets called only when /all/ the files are closed.
+ * Called when filp is released. This happens when all file descriptors
+ * for a single struct file are closed. Note that different open() calls
+ * for the same file yield different struct file structures.
  */
 static int ext2_release_file (struct inode * inode, struct file * filp)
 {
@@ -53,7 +53,6 @@ const struct file_operations ext2_file_operations = {
 	.open		= generic_file_open,
 	.release	= ext2_release_file,
 	.fsync		= ext2_sync_file,
-	.sendfile	= generic_file_sendfile,
 	.splice_read	= generic_file_splice_read,
 	.splice_write	= generic_file_splice_write,
 };
@@ -71,7 +70,6 @@ const struct file_operations ext2_xip_file_operations = {
 	.open		= generic_file_open,
 	.release	= ext2_release_file,
 	.fsync		= ext2_sync_file,
-	.sendfile	= xip_file_sendfile,
 };
 #endif
 
diff --git a/fs/ext2/ioctl.c b/fs/ext2/ioctl.c
index e85c482..3bcd254 100644
--- a/fs/ext2/ioctl.c
+++ b/fs/ext2/ioctl.c
@@ -36,7 +36,7 @@ int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
 		if (IS_RDONLY(inode))
 			return -EROFS;
 
-		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+		if (!is_owner_or_cap(inode))
 			return -EACCES;
 
 		if (get_user(flags, (int __user *) arg))
@@ -74,7 +74,7 @@ int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
 	case EXT2_IOC_GETVERSION:
 		return put_user(inode->i_generation, (int __user *) arg);
 	case EXT2_IOC_SETVERSION:
-		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+		if (!is_owner_or_cap(inode))
 			return -EPERM;
 		if (IS_RDONLY(inode))
 			return -EROFS;
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 16337bf..3eefa97 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -25,6 +25,7 @@
 #include <linux/parser.h>
 #include <linux/random.h>
 #include <linux/buffer_head.h>
+#include <linux/exportfs.h>
 #include <linux/smp_lock.h>
 #include <linux/vfs.h>
 #include <linux/seq_file.h>
@@ -1038,6 +1039,15 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
 	sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
 		((sbi->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
 
+	ext2_xip_verify_sb(sb); /* see if bdev supports xip, unset
+				    EXT2_MOUNT_XIP if not */
+
+	if ((ext2_use_xip(sb)) && (sb->s_blocksize != PAGE_SIZE)) {
+		printk("XIP: Unsupported blocksize\n");
+		err = -EINVAL;
+		goto restore_opts;
+	}
+
 	es = sbi->s_es;
 	if (((sbi->s_mount_opt & EXT2_MOUNT_XIP) !=
 	    (old_mount_opt & EXT2_MOUNT_XIP)) &&
@@ -1090,15 +1100,18 @@ static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf)
 	struct super_block *sb = dentry->d_sb;
 	struct ext2_sb_info *sbi = EXT2_SB(sb);
 	struct ext2_super_block *es = sbi->s_es;
-	unsigned long overhead;
-	int i;
 	u64 fsid;
 
 	if (test_opt (sb, MINIX_DF))
-		overhead = 0;
-	else {
+		sbi->s_overhead_last = 0;
+	else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
+		unsigned long i, overhead = 0;
+		smp_rmb();
+
 		/*
-		 * Compute the overhead (FS structures)
+		 * Compute the overhead (FS structures). This is constant
+		 * for a given filesystem unless the number of block groups
+		 * changes so we cache the previous value until it does.
 		 */
 
 		/*
@@ -1122,17 +1135,22 @@ static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf)
 		 */
 		overhead += (sbi->s_groups_count *
 			     (2 + sbi->s_itb_per_group));
+		sbi->s_overhead_last = overhead;
+		smp_wmb();
+		sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count);
 	}
 
 	buf->f_type = EXT2_SUPER_MAGIC;
 	buf->f_bsize = sb->s_blocksize;
-	buf->f_blocks = le32_to_cpu(es->s_blocks_count) - overhead;
+	buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last;
 	buf->f_bfree = ext2_count_free_blocks(sb);
+	es->s_free_blocks_count = cpu_to_le32(buf->f_bfree);
 	buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
 	if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
 		buf->f_bavail = 0;
 	buf->f_files = le32_to_cpu(es->s_inodes_count);
 	buf->f_ffree = ext2_count_free_inodes(sb);
+	es->s_free_inodes_count = cpu_to_le32(buf->f_ffree);
 	buf->f_namelen = EXT2_NAME_LEN;
 	fsid = le64_to_cpup((void *)es->s_uuid) ^
 	       le64_to_cpup((void *)es->s_uuid + sizeof(u64));
diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c
index 1e5038d..d34e996 100644
--- a/fs/ext3/acl.c
+++ b/fs/ext3/acl.c
@@ -489,7 +489,7 @@ ext3_xattr_set_acl(struct inode *inode, int type, const void *value,
 
 	if (!test_opt(inode->i_sb, POSIX_ACL))
 		return -EOPNOTSUPP;
-	if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+	if (!is_owner_or_cap(inode))
 		return -EPERM;
 
 	if (value) {
diff --git a/fs/ext3/file.c b/fs/ext3/file.c
index 1e6f138..acc4913 100644
--- a/fs/ext3/file.c
+++ b/fs/ext3/file.c
@@ -120,7 +120,6 @@ const struct file_operations ext3_file_operations = {
 	.open		= generic_file_open,
 	.release	= ext3_release_file,
 	.fsync		= ext3_sync_file,
-	.sendfile	= generic_file_sendfile,
 	.splice_read	= generic_file_splice_read,
 	.splice_write	= generic_file_splice_write,
 };
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index a6cb617..de4e316 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -2677,8 +2677,10 @@ void ext3_read_inode(struct inode * inode)
 		 */
 		ei->i_extra_isize = le16_to_cpu(raw_inode->i_extra_isize);
 		if (EXT3_GOOD_OLD_INODE_SIZE + ei->i_extra_isize >
-		    EXT3_INODE_SIZE(inode->i_sb))
+		    EXT3_INODE_SIZE(inode->i_sb)) {
+			brelse (bh);
 			goto bad_inode;
+		}
 		if (ei->i_extra_isize == 0) {
 			/* The extra space is currently unused. Use it. */
 			ei->i_extra_isize = sizeof(struct ext3_inode) -
@@ -3193,7 +3195,7 @@ int ext3_change_inode_journal_flag(struct inode *inode, int val)
 	 */
 
 	journal = EXT3_JOURNAL(inode);
-	if (is_journal_aborted(journal) || IS_RDONLY(inode))
+	if (is_journal_aborted(journal))
 		return -EROFS;
 
 	journal_lock_updates(journal);
diff --git a/fs/ext3/ioctl.c b/fs/ext3/ioctl.c
index 965006d..4a2a02c 100644
--- a/fs/ext3/ioctl.c
+++ b/fs/ext3/ioctl.c
@@ -41,7 +41,7 @@ int ext3_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
 		if (IS_RDONLY(inode))
 			return -EROFS;
 
-		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+		if (!is_owner_or_cap(inode))
 			return -EACCES;
 
 		if (get_user(flags, (int __user *) arg))
@@ -122,7 +122,7 @@ flags_err:
 		__u32 generation;
 		int err;
 
-		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+		if (!is_owner_or_cap(inode))
 			return -EPERM;
 		if (IS_RDONLY(inode))
 			return -EROFS;
@@ -181,7 +181,7 @@ flags_err:
 		if (IS_RDONLY(inode))
 			return -EROFS;
 
-		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+		if (!is_owner_or_cap(inode))
 			return -EACCES;
 
 		if (get_user(rsv_window_size, (int __user *)arg))
diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index 9bb046d..1586807 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -1019,6 +1019,11 @@ static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, str
 
 		if (!inode)
 			return ERR_PTR(-EACCES);
+
+		if (is_bad_inode(inode)) {
+			iput(inode);
+			return ERR_PTR(-ENOENT);
+		}
 	}
 	return d_splice_alias(inode, dentry);
 }
@@ -1054,6 +1059,11 @@ struct dentry *ext3_get_parent(struct dentry *child)
 	if (!inode)
 		return ERR_PTR(-EACCES);
 
+	if (is_bad_inode(inode)) {
+		iput(inode);
+		return ERR_PTR(-ENOENT);
+	}
+
 	parent = d_alloc_anon(inode);
 	if (!parent) {
 		iput(inode);
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 6e30629..4f84dc8 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -29,12 +29,14 @@
 #include <linux/parser.h>
 #include <linux/smp_lock.h>
 #include <linux/buffer_head.h>
+#include <linux/exportfs.h>
 #include <linux/vfs.h>
 #include <linux/random.h>
 #include <linux/mount.h>
 #include <linux/namei.h>
 #include <linux/quotaops.h>
 #include <linux/seq_file.h>
+#include <linux/log2.h>
 
 #include <asm/uaccess.h>
 
@@ -459,6 +461,14 @@ static struct inode *ext3_alloc_inode(struct super_block *sb)
 
 static void ext3_destroy_inode(struct inode *inode)
 {
+	if (!list_empty(&(EXT3_I(inode)->i_orphan))) {
+		printk("EXT3 Inode %p: orphan list check failed!\n",
+			EXT3_I(inode));
+		print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4,
+				EXT3_I(inode), sizeof(struct ext3_inode_info),
+				false);
+		dump_stack();
+	}
 	kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
 }
 
@@ -1566,7 +1576,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 		sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
 		sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
 		if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) ||
-		    (sbi->s_inode_size & (sbi->s_inode_size - 1)) ||
+		    (!is_power_of_2(sbi->s_inode_size)) ||
 		    (sbi->s_inode_size > blocksize)) {
 			printk (KERN_ERR
 				"EXT3-fs: unsupported inode size: %d\n",
@@ -2075,6 +2085,7 @@ static int ext3_create_journal(struct super_block * sb,
 			       unsigned int journal_inum)
 {
 	journal_t *journal;
+	int err;
 
 	if (sb->s_flags & MS_RDONLY) {
 		printk(KERN_ERR "EXT3-fs: readonly filesystem when trying to "
@@ -2082,13 +2093,15 @@ static int ext3_create_journal(struct super_block * sb,
 		return -EROFS;
 	}
 
-	if (!(journal = ext3_get_journal(sb, journal_inum)))
+	journal = ext3_get_journal(sb, journal_inum);
+	if (!journal)
 		return -EINVAL;
 
 	printk(KERN_INFO "EXT3-fs: creating new journal on inode %u\n",
 	       journal_inum);
 
-	if (journal_create(journal)) {
+	err = journal_create(journal);
+	if (err) {
 		printk(KERN_ERR "EXT3-fs: error creating journal.\n");
 		journal_destroy(journal);
 		return -EIO;
@@ -2139,12 +2152,14 @@ static void ext3_mark_recovery_complete(struct super_block * sb,
 
 	journal_lock_updates(journal);
 	journal_flush(journal);
+	lock_super(sb);
 	if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) &&
 	    sb->s_flags & MS_RDONLY) {
 		EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
 		sb->s_dirt = 0;
 		ext3_commit_super(sb, es, 1);
 	}
+	unlock_super(sb);
 	journal_unlock_updates(journal);
 }
 
@@ -2333,7 +2348,13 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
 			    (sbi->s_mount_state & EXT3_VALID_FS))
 				es->s_state = cpu_to_le16(sbi->s_mount_state);
 
+			/*
+			 * We have to unlock super so that we can wait for
+			 * transactions.
+			 */
+			unlock_super(sb);
 			ext3_mark_recovery_complete(sb, es);
+			lock_super(sb);
 		} else {
 			__le32 ret;
 			if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb,
@@ -2406,19 +2427,19 @@ static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
 	struct super_block *sb = dentry->d_sb;
 	struct ext3_sb_info *sbi = EXT3_SB(sb);
 	struct ext3_super_block *es = sbi->s_es;
-	ext3_fsblk_t overhead;
-	int i;
 	u64 fsid;
 
-	if (test_opt (sb, MINIX_DF))
-		overhead = 0;
-	else {
-		unsigned long ngroups;
-		ngroups = EXT3_SB(sb)->s_groups_count;
+	if (test_opt(sb, MINIX_DF)) {
+		sbi->s_overhead_last = 0;
+	} else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
+		unsigned long ngroups = sbi->s_groups_count, i;
+		ext3_fsblk_t overhead = 0;
 		smp_rmb();
 
 		/*
-		 * Compute the overhead (FS structures)
+		 * Compute the overhead (FS structures).  This is constant
+		 * for a given filesystem unless the number of block groups
+		 * changes so we cache the previous value until it does.
 		 */
 
 		/*
@@ -2442,18 +2463,23 @@ static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
 		 * Every block group has an inode bitmap, a block
 		 * bitmap, and an inode table.
 		 */
-		overhead += (ngroups * (2 + EXT3_SB(sb)->s_itb_per_group));
+		overhead += ngroups * (2 + sbi->s_itb_per_group);
+		sbi->s_overhead_last = overhead;
+		smp_wmb();
+		sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count);
 	}
 
 	buf->f_type = EXT3_SUPER_MAGIC;
 	buf->f_bsize = sb->s_blocksize;
-	buf->f_blocks = le32_to_cpu(es->s_blocks_count) - overhead;
+	buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last;
 	buf->f_bfree = percpu_counter_sum(&sbi->s_freeblocks_counter);
+	es->s_free_blocks_count = cpu_to_le32(buf->f_bfree);
 	buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
 	if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
 		buf->f_bavail = 0;
 	buf->f_files = le32_to_cpu(es->s_inodes_count);
 	buf->f_ffree = percpu_counter_sum(&sbi->s_freeinodes_counter);
+	es->s_free_inodes_count = cpu_to_le32(buf->f_ffree);
 	buf->f_namelen = EXT3_NAME_LEN;
 	fsid = le64_to_cpup((void *)es->s_uuid) ^
 	       le64_to_cpup((void *)es->s_uuid + sizeof(u64));
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index 9e88254..a8bae8c 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -489,7 +489,7 @@ ext4_xattr_set_acl(struct inode *inode, int type, const void *value,
 
 	if (!test_opt(inode->i_sb, POSIX_ACL))
 		return -EOPNOTSUPP;
-	if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+	if (!is_owner_or_cap(inode))
 		return -EPERM;
 
 	if (value) {
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 3b64bb1..e53b4af 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -517,7 +517,7 @@ do_more:
 		/*
 		 * An HJ special.  This is expensive...
 		 */
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
 		jbd_unlock_bh_state(bitmap_bh);
 		{
 			struct buffer_head *debug_bh;
@@ -1585,7 +1585,7 @@ allocated:
 	ret_block = grp_alloc_blk + ext4_group_first_block_no(sb, group_no);
 
 	if (in_range(ext4_block_bitmap(sb, gdp), ret_block, num) ||
-	    in_range(ext4_block_bitmap(sb, gdp), ret_block, num) ||
+	    in_range(ext4_inode_bitmap(sb, gdp), ret_block, num) ||
 	    in_range(ret_block, ext4_inode_table(sb, gdp),
 		     EXT4_SB(sb)->s_itb_per_group) ||
 	    in_range(ret_block + num - 1, ext4_inode_table(sb, gdp),
@@ -1597,7 +1597,7 @@ allocated:
 
 	performed_allocation = 1;
 
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
 	{
 		struct buffer_head *debug_bh;
 
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index b9ce2412..750c46f 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -39,6 +39,7 @@
 #include <linux/quotaops.h>
 #include <linux/string.h>
 #include <linux/slab.h>
+#include <linux/falloc.h>
 #include <linux/ext4_fs_extents.h>
 #include <asm/uaccess.h>
 
@@ -91,36 +92,6 @@ static void ext4_idx_store_pblock(struct ext4_extent_idx *ix, ext4_fsblk_t pb)
 	ix->ei_leaf_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
 }
 
-static int ext4_ext_check_header(const char *function, struct inode *inode,
-				struct ext4_extent_header *eh)
-{
-	const char *error_msg = NULL;
-
-	if (unlikely(eh->eh_magic != EXT4_EXT_MAGIC)) {
-		error_msg = "invalid magic";
-		goto corrupted;
-	}
-	if (unlikely(eh->eh_max == 0)) {
-		error_msg = "invalid eh_max";
-		goto corrupted;
-	}
-	if (unlikely(le16_to_cpu(eh->eh_entries) > le16_to_cpu(eh->eh_max))) {
-		error_msg = "invalid eh_entries";
-		goto corrupted;
-	}
-	return 0;
-
-corrupted:
-	ext4_error(inode->i_sb, function,
-			"bad header in inode #%lu: %s - magic %x, "
-			"entries %u, max %u, depth %u",
-			inode->i_ino, error_msg, le16_to_cpu(eh->eh_magic),
-			le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max),
-			le16_to_cpu(eh->eh_depth));
-
-	return -EIO;
-}
-
 static handle_t *ext4_ext_journal_restart(handle_t *handle, int needed)
 {
 	int err;
@@ -269,6 +240,70 @@ static int ext4_ext_space_root_idx(struct inode *inode)
 	return size;
 }
 
+static int
+ext4_ext_max_entries(struct inode *inode, int depth)
+{
+	int max;
+
+	if (depth == ext_depth(inode)) {
+		if (depth == 0)
+			max = ext4_ext_space_root(inode);
+		else
+			max = ext4_ext_space_root_idx(inode);
+	} else {
+		if (depth == 0)
+			max = ext4_ext_space_block(inode);
+		else
+			max = ext4_ext_space_block_idx(inode);
+	}
+
+	return max;
+}
+
+static int __ext4_ext_check_header(const char *function, struct inode *inode,
+					struct ext4_extent_header *eh,
+					int depth)
+{
+	const char *error_msg;
+	int max = 0;
+
+	if (unlikely(eh->eh_magic != EXT4_EXT_MAGIC)) {
+		error_msg = "invalid magic";
+		goto corrupted;
+	}
+	if (unlikely(le16_to_cpu(eh->eh_depth) != depth)) {
+		error_msg = "unexpected eh_depth";
+		goto corrupted;
+	}
+	if (unlikely(eh->eh_max == 0)) {
+		error_msg = "invalid eh_max";
+		goto corrupted;
+	}
+	max = ext4_ext_max_entries(inode, depth);
+	if (unlikely(le16_to_cpu(eh->eh_max) > max)) {
+		error_msg = "too large eh_max";
+		goto corrupted;
+	}
+	if (unlikely(le16_to_cpu(eh->eh_entries) > le16_to_cpu(eh->eh_max))) {
+		error_msg = "invalid eh_entries";
+		goto corrupted;
+	}
+	return 0;
+
+corrupted:
+	ext4_error(inode->i_sb, function,
+			"bad header in inode #%lu: %s - magic %x, "
+			"entries %u, max %u(%u), depth %u(%u)",
+			inode->i_ino, error_msg, le16_to_cpu(eh->eh_magic),
+			le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max),
+			max, le16_to_cpu(eh->eh_depth), depth);
+
+	return -EIO;
+}
+
+#define ext4_ext_check_header(inode, eh, depth)	\
+	__ext4_ext_check_header(__FUNCTION__, inode, eh, depth)
+
 #ifdef EXT_DEBUG
 static void ext4_ext_show_path(struct inode *inode, struct ext4_ext_path *path)
 {
@@ -282,7 +317,7 @@ static void ext4_ext_show_path(struct inode *inode, struct ext4_ext_path *path)
 		} else if (path->p_ext) {
 			ext_debug("  %d:%d:%llu ",
 				  le32_to_cpu(path->p_ext->ee_block),
-				  le16_to_cpu(path->p_ext->ee_len),
+				  ext4_ext_get_actual_len(path->p_ext),
 				  ext_pblock(path->p_ext));
 		} else
 			ext_debug("  []");
@@ -305,7 +340,7 @@ static void ext4_ext_show_leaf(struct inode *inode, struct ext4_ext_path *path)
 
 	for (i = 0; i < le16_to_cpu(eh->eh_entries); i++, ex++) {
 		ext_debug("%d:%d:%llu ", le32_to_cpu(ex->ee_block),
-			  le16_to_cpu(ex->ee_len), ext_pblock(ex));
+			  ext4_ext_get_actual_len(ex), ext_pblock(ex));
 	}
 	ext_debug("\n");
 }
@@ -329,6 +364,7 @@ static void ext4_ext_drop_refs(struct ext4_ext_path *path)
 /*
  * ext4_ext_binsearch_idx:
  * binary search for the closest index of the given block
+ * the header must be checked before calling this
  */
 static void
 ext4_ext_binsearch_idx(struct inode *inode, struct ext4_ext_path *path, int block)
@@ -336,27 +372,25 @@ ext4_ext_binsearch_idx(struct inode *inode, struct ext4_ext_path *path, int bloc
 	struct ext4_extent_header *eh = path->p_hdr;
 	struct ext4_extent_idx *r, *l, *m;
 
-	BUG_ON(eh->eh_magic != EXT4_EXT_MAGIC);
-	BUG_ON(le16_to_cpu(eh->eh_entries) > le16_to_cpu(eh->eh_max));
-	BUG_ON(le16_to_cpu(eh->eh_entries) <= 0);
 
 	ext_debug("binsearch for %d(idx):  ", block);
 
 	l = EXT_FIRST_INDEX(eh) + 1;
-	r = EXT_FIRST_INDEX(eh) + le16_to_cpu(eh->eh_entries) - 1;
+	r = EXT_LAST_INDEX(eh);
 	while (l <= r) {
 		m = l + (r - l) / 2;
 		if (block < le32_to_cpu(m->ei_block))
 			r = m - 1;
 		else
 			l = m + 1;
-		ext_debug("%p(%u):%p(%u):%p(%u) ", l, l->ei_block,
-				m, m->ei_block, r, r->ei_block);
+		ext_debug("%p(%u):%p(%u):%p(%u) ", l, le32_to_cpu(l->ei_block),
+				m, le32_to_cpu(m->ei_block),
+				r, le32_to_cpu(r->ei_block));
 	}
 
 	path->p_idx = l - 1;
 	ext_debug("  -> %d->%lld ", le32_to_cpu(path->p_idx->ei_block),
-		  idx_block(path->p_idx));
+		  idx_pblock(path->p_idx));
 
 #ifdef CHECK_BINSEARCH
 	{
@@ -388,6 +422,7 @@ ext4_ext_binsearch_idx(struct inode *inode, struct ext4_ext_path *path, int bloc
 /*
  * ext4_ext_binsearch:
  * binary search for closest extent of the given block
+ * the header must be checked before calling this
  */
 static void
 ext4_ext_binsearch(struct inode *inode, struct ext4_ext_path *path, int block)
@@ -395,9 +430,6 @@ ext4_ext_binsearch(struct inode *inode, struct ext4_ext_path *path, int block)
 	struct ext4_extent_header *eh = path->p_hdr;
 	struct ext4_extent *r, *l, *m;
 
-	BUG_ON(eh->eh_magic != EXT4_EXT_MAGIC);
-	BUG_ON(le16_to_cpu(eh->eh_entries) > le16_to_cpu(eh->eh_max));
-
 	if (eh->eh_entries == 0) {
 		/*
 		 * this leaf is empty:
@@ -409,7 +441,7 @@ ext4_ext_binsearch(struct inode *inode, struct ext4_ext_path *path, int block)
 	ext_debug("binsearch for %d:  ", block);
 
 	l = EXT_FIRST_EXTENT(eh) + 1;
-	r = EXT_FIRST_EXTENT(eh) + le16_to_cpu(eh->eh_entries) - 1;
+	r = EXT_LAST_EXTENT(eh);
 
 	while (l <= r) {
 		m = l + (r - l) / 2;
@@ -417,15 +449,16 @@ ext4_ext_binsearch(struct inode *inode, struct ext4_ext_path *path, int block)
 			r = m - 1;
 		else
 			l = m + 1;
-		ext_debug("%p(%u):%p(%u):%p(%u) ", l, l->ee_block,
-				m, m->ee_block, r, r->ee_block);
+		ext_debug("%p(%u):%p(%u):%p(%u) ", l, le32_to_cpu(l->ee_block),
+				m, le32_to_cpu(m->ee_block),
+				r, le32_to_cpu(r->ee_block));
 	}
 
 	path->p_ext = l - 1;
 	ext_debug("  -> %d:%llu:%d ",
 			le32_to_cpu(path->p_ext->ee_block),
 			ext_pblock(path->p_ext),
-			le16_to_cpu(path->p_ext->ee_len));
+			ext4_ext_get_actual_len(path->p_ext));
 
 #ifdef CHECK_BINSEARCH
 	{
@@ -468,11 +501,10 @@ ext4_ext_find_extent(struct inode *inode, int block, struct ext4_ext_path *path)
 	short int depth, i, ppos = 0, alloc = 0;
 
 	eh = ext_inode_hdr(inode);
-	BUG_ON(eh == NULL);
-	if (ext4_ext_check_header(__FUNCTION__, inode, eh))
+	depth = ext_depth(inode);
+	if (ext4_ext_check_header(inode, eh, depth))
 		return ERR_PTR(-EIO);
 
-	i = depth = ext_depth(inode);
 
 	/* account possible depth increase */
 	if (!path) {
@@ -484,10 +516,12 @@ ext4_ext_find_extent(struct inode *inode, int block, struct ext4_ext_path *path)
 	}
 	path[0].p_hdr = eh;
 
+	i = depth;
 	/* walk through the tree */
 	while (i) {
 		ext_debug("depth %d: num %d, max %d\n",
 			  ppos, le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max));
+
 		ext4_ext_binsearch_idx(inode, path + ppos, block);
 		path[ppos].p_block = idx_pblock(path[ppos].p_idx);
 		path[ppos].p_depth = i;
@@ -504,7 +538,7 @@ ext4_ext_find_extent(struct inode *inode, int block, struct ext4_ext_path *path)
 		path[ppos].p_hdr = eh;
 		i--;
 
-		if (ext4_ext_check_header(__FUNCTION__, inode, eh))
+		if (ext4_ext_check_header(inode, eh, i))
 			goto err;
 	}
 
@@ -513,9 +547,6 @@ ext4_ext_find_extent(struct inode *inode, int block, struct ext4_ext_path *path)
 	path[ppos].p_ext = NULL;
 	path[ppos].p_idx = NULL;
 
-	if (ext4_ext_check_header(__FUNCTION__, inode, eh))
-		goto err;
-
 	/* find extent */
 	ext4_ext_binsearch(inode, path + ppos, block);
 
@@ -553,7 +584,7 @@ static int ext4_ext_insert_index(handle_t *handle, struct inode *inode,
 		if (curp->p_idx != EXT_LAST_INDEX(curp->p_hdr)) {
 			len = (len - 1) * sizeof(struct ext4_extent_idx);
 			len = len < 0 ? 0 : len;
-			ext_debug("insert new index %d after: %d. "
+			ext_debug("insert new index %d after: %llu. "
 					"move %d from 0x%p to 0x%p\n",
 					logical, ptr, len,
 					(curp->p_idx + 1), (curp->p_idx + 2));
@@ -564,7 +595,7 @@ static int ext4_ext_insert_index(handle_t *handle, struct inode *inode,
 		/* insert before */
 		len = len * sizeof(struct ext4_extent_idx);
 		len = len < 0 ? 0 : len;
-		ext_debug("insert new index %d before: %d. "
+		ext_debug("insert new index %d before: %llu. "
 				"move %d from 0x%p to 0x%p\n",
 				logical, ptr, len,
 				curp->p_idx, (curp->p_idx + 1));
@@ -686,7 +717,7 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode,
 		ext_debug("move %d:%llu:%d in new leaf %llu\n",
 				le32_to_cpu(path[depth].p_ext->ee_block),
 				ext_pblock(path[depth].p_ext),
-				le16_to_cpu(path[depth].p_ext->ee_len),
+				ext4_ext_get_actual_len(path[depth].p_ext),
 				newblock);
 		/*memmove(ex++, path[depth].p_ext++,
 				sizeof(struct ext4_extent));
@@ -764,7 +795,7 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode,
 		BUG_ON(EXT_MAX_INDEX(path[i].p_hdr) !=
 				EXT_LAST_INDEX(path[i].p_hdr));
 		while (path[i].p_idx <= EXT_MAX_INDEX(path[i].p_hdr)) {
-			ext_debug("%d: move %d:%d in new index %llu\n", i,
+			ext_debug("%d: move %d:%llu in new index %llu\n", i,
 					le32_to_cpu(path[i].p_idx->ei_block),
 					idx_pblock(path[i].p_idx),
 					newblock);
@@ -893,8 +924,13 @@ static int ext4_ext_grow_indepth(handle_t *handle, struct inode *inode,
 	curp->p_hdr->eh_max = cpu_to_le16(ext4_ext_space_root_idx(inode));
 	curp->p_hdr->eh_entries = cpu_to_le16(1);
 	curp->p_idx = EXT_FIRST_INDEX(curp->p_hdr);
-	/* FIXME: it works, but actually path[0] can be index */
-	curp->p_idx->ei_block = EXT_FIRST_EXTENT(path[0].p_hdr)->ee_block;
+
+	if (path[0].p_hdr->eh_depth)
+		curp->p_idx->ei_block =
+			EXT_FIRST_INDEX(path[0].p_hdr)->ei_block;
+	else
+		curp->p_idx->ei_block =
+			EXT_FIRST_EXTENT(path[0].p_hdr)->ee_block;
 	ext4_idx_store_pblock(curp->p_idx, newblock);
 
 	neh = ext_inode_hdr(inode);
@@ -1106,7 +1142,24 @@ static int
 ext4_can_extents_be_merged(struct inode *inode, struct ext4_extent *ex1,
 				struct ext4_extent *ex2)
 {
-	if (le32_to_cpu(ex1->ee_block) + le16_to_cpu(ex1->ee_len) !=
+	unsigned short ext1_ee_len, ext2_ee_len, max_len;
+
+	/*
+	 * Make sure that either both extents are uninitialized, or
+	 * both are _not_.
+	 */
+	if (ext4_ext_is_uninitialized(ex1) ^ ext4_ext_is_uninitialized(ex2))
+		return 0;
+
+	if (ext4_ext_is_uninitialized(ex1))
+		max_len = EXT_UNINIT_MAX_LEN;
+	else
+		max_len = EXT_INIT_MAX_LEN;
+
+	ext1_ee_len = ext4_ext_get_actual_len(ex1);
+	ext2_ee_len = ext4_ext_get_actual_len(ex2);
+
+	if (le32_to_cpu(ex1->ee_block) + ext1_ee_len !=
 			le32_to_cpu(ex2->ee_block))
 		return 0;
 
@@ -1115,19 +1168,66 @@ ext4_can_extents_be_merged(struct inode *inode, struct ext4_extent *ex1,
 	 * as an RO_COMPAT feature, refuse to merge to extents if
 	 * this can result in the top bit of ee_len being set.
 	 */
-	if (le16_to_cpu(ex1->ee_len) + le16_to_cpu(ex2->ee_len) > EXT_MAX_LEN)
+	if (ext1_ee_len + ext2_ee_len > max_len)
 		return 0;
 #ifdef AGGRESSIVE_TEST
 	if (le16_to_cpu(ex1->ee_len) >= 4)
 		return 0;
 #endif
 
-	if (ext_pblock(ex1) + le16_to_cpu(ex1->ee_len) == ext_pblock(ex2))
+	if (ext_pblock(ex1) + ext1_ee_len == ext_pblock(ex2))
 		return 1;
 	return 0;
 }
 
 /*
+ * This function tries to merge the "ex" extent to the next extent in the tree.
+ * It always tries to merge towards right. If you want to merge towards
+ * left, pass "ex - 1" as argument instead of "ex".
+ * Returns 0 if the extents (ex and ex+1) were _not_ merged and returns
+ * 1 if they got merged.
+ */
+int ext4_ext_try_to_merge(struct inode *inode,
+			  struct ext4_ext_path *path,
+			  struct ext4_extent *ex)
+{
+	struct ext4_extent_header *eh;
+	unsigned int depth, len;
+	int merge_done = 0;
+	int uninitialized = 0;
+
+	depth = ext_depth(inode);
+	BUG_ON(path[depth].p_hdr == NULL);
+	eh = path[depth].p_hdr;
+
+	while (ex < EXT_LAST_EXTENT(eh)) {
+		if (!ext4_can_extents_be_merged(inode, ex, ex + 1))
+			break;
+		/* merge with next extent! */
+		if (ext4_ext_is_uninitialized(ex))
+			uninitialized = 1;
+		ex->ee_len = cpu_to_le16(ext4_ext_get_actual_len(ex)
+				+ ext4_ext_get_actual_len(ex + 1));
+		if (uninitialized)
+			ext4_ext_mark_uninitialized(ex);
+
+		if (ex + 1 < EXT_LAST_EXTENT(eh)) {
+			len = (EXT_LAST_EXTENT(eh) - ex - 1)
+				* sizeof(struct ext4_extent);
+			memmove(ex + 1, ex + 2, len);
+		}
+		eh->eh_entries = cpu_to_le16(le16_to_cpu(eh->eh_entries) - 1);
+		merge_done = 1;
+		WARN_ON(eh->eh_entries == 0);
+		if (!eh->eh_entries)
+			ext4_error(inode->i_sb, "ext4_ext_try_to_merge",
+			   "inode#%lu, eh->eh_entries = 0!", inode->i_ino);
+	}
+
+	return merge_done;
+}
+
+/*
  * check if a portion of the "newext" extent overlaps with an
  * existing extent.
  *
@@ -1144,7 +1244,7 @@ unsigned int ext4_ext_check_overlap(struct inode *inode,
 	unsigned int ret = 0;
 
 	b1 = le32_to_cpu(newext->ee_block);
-	len1 = le16_to_cpu(newext->ee_len);
+	len1 = ext4_ext_get_actual_len(newext);
 	depth = ext_depth(inode);
 	if (!path[depth].p_ext)
 		goto out;
@@ -1191,8 +1291,9 @@ int ext4_ext_insert_extent(handle_t *handle, struct inode *inode,
 	struct ext4_extent *nearex; /* nearest extent */
 	struct ext4_ext_path *npath = NULL;
 	int depth, len, err, next;
+	unsigned uninitialized = 0;
 
-	BUG_ON(newext->ee_len == 0);
+	BUG_ON(ext4_ext_get_actual_len(newext) == 0);
 	depth = ext_depth(inode);
 	ex = path[depth].p_ext;
 	BUG_ON(path[depth].p_hdr == NULL);
@@ -1200,14 +1301,24 @@ int ext4_ext_insert_extent(handle_t *handle, struct inode *inode,
 	/* try to insert block into found extent and return */
 	if (ex && ext4_can_extents_be_merged(inode, ex, newext)) {
 		ext_debug("append %d block to %d:%d (from %llu)\n",
-				le16_to_cpu(newext->ee_len),
+				ext4_ext_get_actual_len(newext),
 				le32_to_cpu(ex->ee_block),
-				le16_to_cpu(ex->ee_len), ext_pblock(ex));
+				ext4_ext_get_actual_len(ex), ext_pblock(ex));
 		err = ext4_ext_get_access(handle, inode, path + depth);
 		if (err)
 			return err;
-		ex->ee_len = cpu_to_le16(le16_to_cpu(ex->ee_len)
-					 + le16_to_cpu(newext->ee_len));
+
+		/*
+		 * ext4_can_extents_be_merged should have checked that either
+		 * both extents are uninitialized, or both aren't. Thus we
+		 * need to check only one of them here.
+		 */
+		if (ext4_ext_is_uninitialized(ex))
+			uninitialized = 1;
+		ex->ee_len = cpu_to_le16(ext4_ext_get_actual_len(ex)
+					+ ext4_ext_get_actual_len(newext));
+		if (uninitialized)
+			ext4_ext_mark_uninitialized(ex);
 		eh = path[depth].p_hdr;
 		nearex = ex;
 		goto merge;
@@ -1263,7 +1374,7 @@ has_space:
 		ext_debug("first extent in the leaf: %d:%llu:%d\n",
 				le32_to_cpu(newext->ee_block),
 				ext_pblock(newext),
-				le16_to_cpu(newext->ee_len));
+				ext4_ext_get_actual_len(newext));
 		path[depth].p_ext = EXT_FIRST_EXTENT(eh);
 	} else if (le32_to_cpu(newext->ee_block)
 			   > le32_to_cpu(nearex->ee_block)) {
@@ -1276,7 +1387,7 @@ has_space:
 					"move %d from 0x%p to 0x%p\n",
 					le32_to_cpu(newext->ee_block),
 					ext_pblock(newext),
-					le16_to_cpu(newext->ee_len),
+					ext4_ext_get_actual_len(newext),
 					nearex, len, nearex + 1, nearex + 2);
 			memmove(nearex + 2, nearex + 1, len);
 		}
@@ -1289,7 +1400,7 @@ has_space:
 				"move %d from 0x%p to 0x%p\n",
 				le32_to_cpu(newext->ee_block),
 				ext_pblock(newext),
-				le16_to_cpu(newext->ee_len),
+				ext4_ext_get_actual_len(newext),
 				nearex, len, nearex + 1, nearex + 2);
 		memmove(nearex + 1, nearex, len);
 		path[depth].p_ext = nearex;
@@ -1304,20 +1415,7 @@ has_space:
 
 merge:
 	/* try to merge extents to the right */
-	while (nearex < EXT_LAST_EXTENT(eh)) {
-		if (!ext4_can_extents_be_merged(inode, nearex, nearex + 1))
-			break;
-		/* merge with next extent! */
-		nearex->ee_len = cpu_to_le16(le16_to_cpu(nearex->ee_len)
-					     + le16_to_cpu(nearex[1].ee_len));
-		if (nearex + 1 < EXT_LAST_EXTENT(eh)) {
-			len = (EXT_LAST_EXTENT(eh) - nearex - 1)
-					* sizeof(struct ext4_extent);
-			memmove(nearex + 1, nearex + 2, len);
-		}
-		eh->eh_entries = cpu_to_le16(le16_to_cpu(eh->eh_entries)-1);
-		BUG_ON(eh->eh_entries == 0);
-	}
+	ext4_ext_try_to_merge(inode, path, nearex);
 
 	/* try to merge extents to the left */
 
@@ -1379,8 +1477,8 @@ int ext4_ext_walk_space(struct inode *inode, unsigned long block,
 			end = le32_to_cpu(ex->ee_block);
 			if (block + num < end)
 				end = block + num;
-		} else if (block >=
-			     le32_to_cpu(ex->ee_block) + le16_to_cpu(ex->ee_len)) {
+		} else if (block >= le32_to_cpu(ex->ee_block)
+					+ ext4_ext_get_actual_len(ex)) {
 			/* need to allocate space after found extent */
 			start = block;
 			end = block + num;
@@ -1392,7 +1490,8 @@ int ext4_ext_walk_space(struct inode *inode, unsigned long block,
 			 * by found extent
 			 */
 			start = block;
-			end = le32_to_cpu(ex->ee_block) + le16_to_cpu(ex->ee_len);
+			end = le32_to_cpu(ex->ee_block)
+				+ ext4_ext_get_actual_len(ex);
 			if (block + num < end)
 				end = block + num;
 			exists = 1;
@@ -1408,7 +1507,7 @@ int ext4_ext_walk_space(struct inode *inode, unsigned long block,
 			cbex.ec_type = EXT4_EXT_CACHE_GAP;
 		} else {
 			cbex.ec_block = le32_to_cpu(ex->ee_block);
-			cbex.ec_len = le16_to_cpu(ex->ee_len);
+			cbex.ec_len = ext4_ext_get_actual_len(ex);
 			cbex.ec_start = ext_pblock(ex);
 			cbex.ec_type = EXT4_EXT_CACHE_EXTENT;
 		}
@@ -1481,15 +1580,15 @@ ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path,
 		ext_debug("cache gap(before): %lu [%lu:%lu]",
 				(unsigned long) block,
 				(unsigned long) le32_to_cpu(ex->ee_block),
-				(unsigned long) le16_to_cpu(ex->ee_len));
+				(unsigned long) ext4_ext_get_actual_len(ex));
 	} else if (block >= le32_to_cpu(ex->ee_block)
-			    + le16_to_cpu(ex->ee_len)) {
+			+ ext4_ext_get_actual_len(ex)) {
 		lblock = le32_to_cpu(ex->ee_block)
-			 + le16_to_cpu(ex->ee_len);
+			+ ext4_ext_get_actual_len(ex);
 		len = ext4_ext_next_allocated_block(path);
 		ext_debug("cache gap(after): [%lu:%lu] %lu",
 				(unsigned long) le32_to_cpu(ex->ee_block),
-				(unsigned long) le16_to_cpu(ex->ee_len),
+				(unsigned long) ext4_ext_get_actual_len(ex),
 				(unsigned long) block);
 		BUG_ON(len == lblock);
 		len = len - lblock;
@@ -1619,12 +1718,12 @@ static int ext4_remove_blocks(handle_t *handle, struct inode *inode,
 				unsigned long from, unsigned long to)
 {
 	struct buffer_head *bh;
+	unsigned short ee_len =  ext4_ext_get_actual_len(ex);
 	int i;
 
 #ifdef EXTENTS_STATS
 	{
 		struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
-		unsigned short ee_len =  le16_to_cpu(ex->ee_len);
 		spin_lock(&sbi->s_ext_stats_lock);
 		sbi->s_ext_blocks += ee_len;
 		sbi->s_ext_extents++;
@@ -1638,12 +1737,12 @@ static int ext4_remove_blocks(handle_t *handle, struct inode *inode,
 	}
 #endif
 	if (from >= le32_to_cpu(ex->ee_block)
-	    && to == le32_to_cpu(ex->ee_block) + le16_to_cpu(ex->ee_len) - 1) {
+	    && to == le32_to_cpu(ex->ee_block) + ee_len - 1) {
 		/* tail removal */
 		unsigned long num;
 		ext4_fsblk_t start;
-		num = le32_to_cpu(ex->ee_block) + le16_to_cpu(ex->ee_len) - from;
-		start = ext_pblock(ex) + le16_to_cpu(ex->ee_len) - num;
+		num = le32_to_cpu(ex->ee_block) + ee_len - from;
+		start = ext_pblock(ex) + ee_len - num;
 		ext_debug("free last %lu blocks starting %llu\n", num, start);
 		for (i = 0; i < num; i++) {
 			bh = sb_find_get_block(inode->i_sb, start + i);
@@ -1651,12 +1750,12 @@ static int ext4_remove_blocks(handle_t *handle, struct inode *inode,
 		}
 		ext4_free_blocks(handle, inode, start, num);
 	} else if (from == le32_to_cpu(ex->ee_block)
-		   && to <= le32_to_cpu(ex->ee_block) + le16_to_cpu(ex->ee_len) - 1) {
+		   && to <= le32_to_cpu(ex->ee_block) + ee_len - 1) {
 		printk("strange request: removal %lu-%lu from %u:%u\n",
-		       from, to, le32_to_cpu(ex->ee_block), le16_to_cpu(ex->ee_len));
+			from, to, le32_to_cpu(ex->ee_block), ee_len);
 	} else {
 		printk("strange request: removal(2) %lu-%lu from %u:%u\n",
-		       from, to, le32_to_cpu(ex->ee_block), le16_to_cpu(ex->ee_len));
+			from, to, le32_to_cpu(ex->ee_block), ee_len);
 	}
 	return 0;
 }
@@ -1671,21 +1770,23 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
 	unsigned a, b, block, num;
 	unsigned long ex_ee_block;
 	unsigned short ex_ee_len;
+	unsigned uninitialized = 0;
 	struct ext4_extent *ex;
 
+	/* the header must be checked already in ext4_ext_remove_space() */
 	ext_debug("truncate since %lu in leaf\n", start);
 	if (!path[depth].p_hdr)
 		path[depth].p_hdr = ext_block_hdr(path[depth].p_bh);
 	eh = path[depth].p_hdr;
 	BUG_ON(eh == NULL);
-	BUG_ON(le16_to_cpu(eh->eh_entries) > le16_to_cpu(eh->eh_max));
-	BUG_ON(eh->eh_magic != EXT4_EXT_MAGIC);
 
 	/* find where to start removing */
 	ex = EXT_LAST_EXTENT(eh);
 
 	ex_ee_block = le32_to_cpu(ex->ee_block);
-	ex_ee_len = le16_to_cpu(ex->ee_len);
+	if (ext4_ext_is_uninitialized(ex))
+		uninitialized = 1;
+	ex_ee_len = ext4_ext_get_actual_len(ex);
 
 	while (ex >= EXT_FIRST_EXTENT(eh) &&
 			ex_ee_block + ex_ee_len > start) {
@@ -1753,6 +1854,12 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
 
 		ex->ee_block = cpu_to_le32(block);
 		ex->ee_len = cpu_to_le16(num);
+		/*
+		 * Do not mark uninitialized if all the blocks in the
+		 * extent have been removed.
+		 */
+		if (uninitialized && num)
+			ext4_ext_mark_uninitialized(ex);
 
 		err = ext4_ext_dirty(handle, inode, path + depth);
 		if (err)
@@ -1762,7 +1869,7 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
 				ext_pblock(ex));
 		ex--;
 		ex_ee_block = le32_to_cpu(ex->ee_block);
-		ex_ee_len = le16_to_cpu(ex->ee_len);
+		ex_ee_len = ext4_ext_get_actual_len(ex);
 	}
 
 	if (correct_index && eh->eh_entries)
@@ -1825,7 +1932,7 @@ int ext4_ext_remove_space(struct inode *inode, unsigned long start)
 		return -ENOMEM;
 	}
 	path[0].p_hdr = ext_inode_hdr(inode);
-	if (ext4_ext_check_header(__FUNCTION__, inode, path[0].p_hdr)) {
+	if (ext4_ext_check_header(inode, path[0].p_hdr, depth)) {
 		err = -EIO;
 		goto out;
 	}
@@ -1846,17 +1953,8 @@ int ext4_ext_remove_space(struct inode *inode, unsigned long start)
 		if (!path[i].p_hdr) {
 			ext_debug("initialize header\n");
 			path[i].p_hdr = ext_block_hdr(path[i].p_bh);
-			if (ext4_ext_check_header(__FUNCTION__, inode,
-							path[i].p_hdr)) {
-				err = -EIO;
-				goto out;
-			}
 		}
 
-		BUG_ON(le16_to_cpu(path[i].p_hdr->eh_entries)
-			   > le16_to_cpu(path[i].p_hdr->eh_max));
-		BUG_ON(path[i].p_hdr->eh_magic != EXT4_EXT_MAGIC);
-
 		if (!path[i].p_idx) {
 			/* this level hasn't been touched yet */
 			path[i].p_idx = EXT_LAST_INDEX(path[i].p_hdr);
@@ -1873,17 +1971,27 @@ int ext4_ext_remove_space(struct inode *inode, unsigned long start)
 				i, EXT_FIRST_INDEX(path[i].p_hdr),
 				path[i].p_idx);
 		if (ext4_ext_more_to_rm(path + i)) {
+			struct buffer_head *bh;
 			/* go to the next level */
 			ext_debug("move to level %d (block %llu)\n",
 				  i + 1, idx_pblock(path[i].p_idx));
 			memset(path + i + 1, 0, sizeof(*path));
-			path[i+1].p_bh =
-				sb_bread(sb, idx_pblock(path[i].p_idx));
-			if (!path[i+1].p_bh) {
+			bh = sb_bread(sb, idx_pblock(path[i].p_idx));
+			if (!bh) {
 				/* should we reset i_size? */
 				err = -EIO;
 				break;
 			}
+			if (WARN_ON(i + 1 > depth)) {
+				err = -EIO;
+				break;
+			}
+			if (ext4_ext_check_header(inode, ext_block_hdr(bh),
+							depth - i - 1)) {
+				err = -EIO;
+				break;
+			}
+			path[i + 1].p_bh = bh;
 
 			/* save actual number of indexes since this
 			 * number is changed at the next iteration */
@@ -1977,15 +2085,158 @@ void ext4_ext_release(struct super_block *sb)
 #endif
 }
 
+/*
+ * This function is called by ext4_ext_get_blocks() if someone tries to write
+ * to an uninitialized extent. It may result in splitting the uninitialized
+ * extent into multiple extents (upto three - one initialized and two
+ * uninitialized).
+ * There are three possibilities:
+ *   a> There is no split required: Entire extent should be initialized
+ *   b> Splits in two extents: Write is happening at either end of the extent
+ *   c> Splits in three extents: Somone is writing in middle of the extent
+ */
+int ext4_ext_convert_to_initialized(handle_t *handle, struct inode *inode,
+					struct ext4_ext_path *path,
+					ext4_fsblk_t iblock,
+					unsigned long max_blocks)
+{
+	struct ext4_extent *ex, newex;
+	struct ext4_extent *ex1 = NULL;
+	struct ext4_extent *ex2 = NULL;
+	struct ext4_extent *ex3 = NULL;
+	struct ext4_extent_header *eh;
+	unsigned int allocated, ee_block, ee_len, depth;
+	ext4_fsblk_t newblock;
+	int err = 0;
+	int ret = 0;
+
+	depth = ext_depth(inode);
+	eh = path[depth].p_hdr;
+	ex = path[depth].p_ext;
+	ee_block = le32_to_cpu(ex->ee_block);
+	ee_len = ext4_ext_get_actual_len(ex);
+	allocated = ee_len - (iblock - ee_block);
+	newblock = iblock - ee_block + ext_pblock(ex);
+	ex2 = ex;
+
+	/* ex1: ee_block to iblock - 1 : uninitialized */
+	if (iblock > ee_block) {
+		ex1 = ex;
+		ex1->ee_len = cpu_to_le16(iblock - ee_block);
+		ext4_ext_mark_uninitialized(ex1);
+		ex2 = &newex;
+	}
+	/*
+	 * for sanity, update the length of the ex2 extent before
+	 * we insert ex3, if ex1 is NULL. This is to avoid temporary
+	 * overlap of blocks.
+	 */
+	if (!ex1 && allocated > max_blocks)
+		ex2->ee_len = cpu_to_le16(max_blocks);
+	/* ex3: to ee_block + ee_len : uninitialised */
+	if (allocated > max_blocks) {
+		unsigned int newdepth;
+		ex3 = &newex;
+		ex3->ee_block = cpu_to_le32(iblock + max_blocks);
+		ext4_ext_store_pblock(ex3, newblock + max_blocks);
+		ex3->ee_len = cpu_to_le16(allocated - max_blocks);
+		ext4_ext_mark_uninitialized(ex3);
+		err = ext4_ext_insert_extent(handle, inode, path, ex3);
+		if (err)
+			goto out;
+		/*
+		 * The depth, and hence eh & ex might change
+		 * as part of the insert above.
+		 */
+		newdepth = ext_depth(inode);
+		if (newdepth != depth) {
+			depth = newdepth;
+			path = ext4_ext_find_extent(inode, iblock, NULL);
+			if (IS_ERR(path)) {
+				err = PTR_ERR(path);
+				path = NULL;
+				goto out;
+			}
+			eh = path[depth].p_hdr;
+			ex = path[depth].p_ext;
+			if (ex2 != &newex)
+				ex2 = ex;
+		}
+		allocated = max_blocks;
+	}
+	/*
+	 * If there was a change of depth as part of the
+	 * insertion of ex3 above, we need to update the length
+	 * of the ex1 extent again here
+	 */
+	if (ex1 && ex1 != ex) {
+		ex1 = ex;
+		ex1->ee_len = cpu_to_le16(iblock - ee_block);
+		ext4_ext_mark_uninitialized(ex1);
+		ex2 = &newex;
+	}
+	/* ex2: iblock to iblock + maxblocks-1 : initialised */
+	ex2->ee_block = cpu_to_le32(iblock);
+	ex2->ee_start = cpu_to_le32(newblock);
+	ext4_ext_store_pblock(ex2, newblock);
+	ex2->ee_len = cpu_to_le16(allocated);
+	if (ex2 != ex)
+		goto insert;
+	err = ext4_ext_get_access(handle, inode, path + depth);
+	if (err)
+		goto out;
+	/*
+	 * New (initialized) extent starts from the first block
+	 * in the current extent. i.e., ex2 == ex
+	 * We have to see if it can be merged with the extent
+	 * on the left.
+	 */
+	if (ex2 > EXT_FIRST_EXTENT(eh)) {
+		/*
+		 * To merge left, pass "ex2 - 1" to try_to_merge(),
+		 * since it merges towards right _only_.
+		 */
+		ret = ext4_ext_try_to_merge(inode, path, ex2 - 1);
+		if (ret) {
+			err = ext4_ext_correct_indexes(handle, inode, path);
+			if (err)
+				goto out;
+			depth = ext_depth(inode);
+			ex2--;
+		}
+	}
+	/*
+	 * Try to Merge towards right. This might be required
+	 * only when the whole extent is being written to.
+	 * i.e. ex2 == ex and ex3 == NULL.
+	 */
+	if (!ex3) {
+		ret = ext4_ext_try_to_merge(inode, path, ex2);
+		if (ret) {
+			err = ext4_ext_correct_indexes(handle, inode, path);
+			if (err)
+				goto out;
+		}
+	}
+	/* Mark modified extent as dirty */
+	err = ext4_ext_dirty(handle, inode, path + depth);
+	goto out;
+insert:
+	err = ext4_ext_insert_extent(handle, inode, path, &newex);
+out:
+	return err ? err : allocated;
+}
+
 int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
 			ext4_fsblk_t iblock,
 			unsigned long max_blocks, struct buffer_head *bh_result,
 			int create, int extend_disksize)
 {
 	struct ext4_ext_path *path = NULL;
+	struct ext4_extent_header *eh;
 	struct ext4_extent newex, *ex;
 	ext4_fsblk_t goal, newblock;
-	int err = 0, depth;
+	int err = 0, depth, ret;
 	unsigned long allocated = 0;
 
 	__clear_bit(BH_New, &bh_result->b_state);
@@ -1998,8 +2249,10 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
 	if (goal) {
 		if (goal == EXT4_EXT_CACHE_GAP) {
 			if (!create) {
-				/* block isn't allocated yet and
-				 * user doesn't want to allocate it */
+				/*
+				 * block isn't allocated yet and
+				 * user doesn't want to allocate it
+				 */
 				goto out2;
 			}
 			/* we should allocate requested block */
@@ -2033,21 +2286,19 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
 	 * this is why assert can't be put in ext4_ext_find_extent()
 	 */
 	BUG_ON(path[depth].p_ext == NULL && depth != 0);
+	eh = path[depth].p_hdr;
 
 	ex = path[depth].p_ext;
 	if (ex) {
 		unsigned long ee_block = le32_to_cpu(ex->ee_block);
 		ext4_fsblk_t ee_start = ext_pblock(ex);
-		unsigned short ee_len  = le16_to_cpu(ex->ee_len);
+		unsigned short ee_len;
 
 		/*
-		 * Allow future support for preallocated extents to be added
-		 * as an RO_COMPAT feature:
 		 * Uninitialized extents are treated as holes, except that
-		 * we avoid (fail) allocating new blocks during a write.
+		 * we split out initialized portions during a write.
 		 */
-		if (ee_len > EXT_MAX_LEN)
-			goto out2;
+		ee_len = ext4_ext_get_actual_len(ex);
 		/* if found extent covers block, simply return it */
 		if (iblock >= ee_block && iblock < ee_block + ee_len) {
 			newblock = iblock - ee_block + ee_start;
@@ -2055,9 +2306,27 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
 			allocated = ee_len - (iblock - ee_block);
 			ext_debug("%d fit into %lu:%d -> %llu\n", (int) iblock,
 					ee_block, ee_len, newblock);
-			ext4_ext_put_in_cache(inode, ee_block, ee_len,
-						ee_start, EXT4_EXT_CACHE_EXTENT);
-			goto out;
+
+			/* Do not put uninitialized extent in the cache */
+			if (!ext4_ext_is_uninitialized(ex)) {
+				ext4_ext_put_in_cache(inode, ee_block,
+							ee_len, ee_start,
+							EXT4_EXT_CACHE_EXTENT);
+				goto out;
+			}
+			if (create == EXT4_CREATE_UNINITIALIZED_EXT)
+				goto out;
+			if (!create)
+				goto out2;
+
+			ret = ext4_ext_convert_to_initialized(handle, inode,
+								path, iblock,
+								max_blocks);
+			if (ret <= 0)
+				goto out2;
+			else
+				allocated = ret;
+			goto outnew;
 		}
 	}
 
@@ -2066,8 +2335,10 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
 	 * we couldn't try to create block if create flag is zero
 	 */
 	if (!create) {
-		/* put just found gap into cache to speed up
-		 * subsequent requests */
+		/*
+		 * put just found gap into cache to speed up
+		 * subsequent requests
+		 */
 		ext4_ext_put_gap_in_cache(inode, path, iblock);
 		goto out2;
 	}
@@ -2081,6 +2352,19 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
 	/* allocate new block */
 	goal = ext4_ext_find_goal(inode, path, iblock);
 
+	/*
+	 * See if request is beyond maximum number of blocks we can have in
+	 * a single extent. For an initialized extent this limit is
+	 * EXT_INIT_MAX_LEN and for an uninitialized extent this limit is
+	 * EXT_UNINIT_MAX_LEN.
+	 */
+	if (max_blocks > EXT_INIT_MAX_LEN &&
+	    create != EXT4_CREATE_UNINITIALIZED_EXT)
+		max_blocks = EXT_INIT_MAX_LEN;
+	else if (max_blocks > EXT_UNINIT_MAX_LEN &&
+		 create == EXT4_CREATE_UNINITIALIZED_EXT)
+		max_blocks = EXT_UNINIT_MAX_LEN;
+
 	/* Check if we can really insert (iblock)::(iblock+max_blocks) extent */
 	newex.ee_block = cpu_to_le32(iblock);
 	newex.ee_len = cpu_to_le16(max_blocks);
@@ -2098,6 +2382,8 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
 	/* try to insert new extent into found leaf and return */
 	ext4_ext_store_pblock(&newex, newblock);
 	newex.ee_len = cpu_to_le16(allocated);
+	if (create == EXT4_CREATE_UNINITIALIZED_EXT)  /* Mark uninitialized */
+		ext4_ext_mark_uninitialized(&newex);
 	err = ext4_ext_insert_extent(handle, inode, path, &newex);
 	if (err) {
 		/* free data blocks we just allocated */
@@ -2111,10 +2397,13 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
 
 	/* previous routine could use block we allocated */
 	newblock = ext_pblock(&newex);
+outnew:
 	__set_bit(BH_New, &bh_result->b_state);
 
-	ext4_ext_put_in_cache(inode, iblock, allocated, newblock,
-				EXT4_EXT_CACHE_EXTENT);
+	/* Cache only when it is _not_ an uninitialized extent */
+	if (create != EXT4_CREATE_UNINITIALIZED_EXT)
+		ext4_ext_put_in_cache(inode, iblock, allocated, newblock,
+						EXT4_EXT_CACHE_EXTENT);
 out:
 	if (allocated > max_blocks)
 		allocated = max_blocks;
@@ -2178,7 +2467,8 @@ void ext4_ext_truncate(struct inode * inode, struct page *page)
 	err = ext4_ext_remove_space(inode, last_block);
 
 	/* In a multi-transaction truncate, we only make the final
-	 * transaction synchronous. */
+	 * transaction synchronous.
+	 */
 	if (IS_SYNC(inode))
 		handle->h_sync = 1;
 
@@ -2217,3 +2507,127 @@ int ext4_ext_writepage_trans_blocks(struct inode *inode, int num)
 
 	return needed;
 }
+
+/*
+ * preallocate space for a file. This implements ext4's fallocate inode
+ * operation, which gets called from sys_fallocate system call.
+ * For block-mapped files, posix_fallocate should fall back to the method
+ * of writing zeroes to the required new blocks (the same behavior which is
+ * expected for file systems which do not support fallocate() system call).
+ */
+long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len)
+{
+	handle_t *handle;
+	ext4_fsblk_t block, max_blocks;
+	ext4_fsblk_t nblocks = 0;
+	int ret = 0;
+	int ret2 = 0;
+	int retries = 0;
+	struct buffer_head map_bh;
+	unsigned int credits, blkbits = inode->i_blkbits;
+
+	/*
+	 * currently supporting (pre)allocate mode for extent-based
+	 * files _only_
+	 */
+	if (!(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL))
+		return -EOPNOTSUPP;
+
+	/* preallocation to directories is currently not supported */
+	if (S_ISDIR(inode->i_mode))
+		return -ENODEV;
+
+	block = offset >> blkbits;
+	max_blocks = (EXT4_BLOCK_ALIGN(len + offset, blkbits) >> blkbits)
+			- block;
+
+	/*
+	 * credits to insert 1 extent into extent tree + buffers to be able to
+	 * modify 1 super block, 1 block bitmap and 1 group descriptor.
+	 */
+	credits = EXT4_DATA_TRANS_BLOCKS(inode->i_sb) + 3;
+retry:
+	while (ret >= 0 && ret < max_blocks) {
+		block = block + ret;
+		max_blocks = max_blocks - ret;
+		handle = ext4_journal_start(inode, credits);
+		if (IS_ERR(handle)) {
+			ret = PTR_ERR(handle);
+			break;
+		}
+
+		ret = ext4_ext_get_blocks(handle, inode, block,
+					  max_blocks, &map_bh,
+					  EXT4_CREATE_UNINITIALIZED_EXT, 0);
+		WARN_ON(!ret);
+		if (!ret) {
+			ext4_error(inode->i_sb, "ext4_fallocate",
+				   "ext4_ext_get_blocks returned 0! inode#%lu"
+				   ", block=%llu, max_blocks=%llu",
+				   inode->i_ino, block, max_blocks);
+			ret = -EIO;
+			ext4_mark_inode_dirty(handle, inode);
+			ret2 = ext4_journal_stop(handle);
+			break;
+		}
+		if (ret > 0) {
+			/* check wrap through sign-bit/zero here */
+			if ((block + ret) < 0 || (block + ret) < block) {
+				ret = -EIO;
+				ext4_mark_inode_dirty(handle, inode);
+				ret2 = ext4_journal_stop(handle);
+				break;
+			}
+			if (buffer_new(&map_bh) && ((block + ret) >
+			    (EXT4_BLOCK_ALIGN(i_size_read(inode), blkbits)
+			    >> blkbits)))
+					nblocks = nblocks + ret;
+		}
+
+		/* Update ctime if new blocks get allocated */
+		if (nblocks) {
+			struct timespec now;
+
+			now = current_fs_time(inode->i_sb);
+			if (!timespec_equal(&inode->i_ctime, &now))
+				inode->i_ctime = now;
+		}
+
+		ext4_mark_inode_dirty(handle, inode);
+		ret2 = ext4_journal_stop(handle);
+		if (ret2)
+			break;
+	}
+
+	if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
+		goto retry;
+
+	/*
+	 * Time to update the file size.
+	 * Update only when preallocation was requested beyond the file size.
+	 */
+	if (!(mode & FALLOC_FL_KEEP_SIZE) &&
+	    (offset + len) > i_size_read(inode)) {
+		if (ret > 0) {
+			/*
+			 * if no error, we assume preallocation succeeded
+			 * completely
+			 */
+			mutex_lock(&inode->i_mutex);
+			i_size_write(inode, offset + len);
+			EXT4_I(inode)->i_disksize = i_size_read(inode);
+			mutex_unlock(&inode->i_mutex);
+		} else if (ret < 0 && nblocks) {
+			/* Handle partial allocation scenario */
+			loff_t newsize;
+
+			mutex_lock(&inode->i_mutex);
+			newsize  = (nblocks << blkbits) + i_size_read(inode);
+			i_size_write(inode, EXT4_BLOCK_ALIGN(newsize, blkbits));
+			EXT4_I(inode)->i_disksize = i_size_read(inode);
+			mutex_unlock(&inode->i_mutex);
+		}
+	}
+
+	return ret > 0 ? ret2 : ret;
+}
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 3c6c1fd..1a81cd6 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -120,7 +120,6 @@ const struct file_operations ext4_file_operations = {
 	.open		= generic_file_open,
 	.release	= ext4_release_file,
 	.fsync		= ext4_sync_file,
-	.sendfile	= generic_file_sendfile,
 	.splice_read	= generic_file_splice_read,
 	.splice_write	= generic_file_splice_write,
 };
@@ -135,5 +134,6 @@ const struct inode_operations ext4_file_inode_operations = {
 	.removexattr	= generic_removexattr,
 #endif
 	.permission	= ext4_permission,
+	.fallocate	= ext4_fallocate,
 };
 
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index c88b439..427f830 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -563,7 +563,8 @@ got:
 	inode->i_ino = ino;
 	/* This is the optimal IO size (for stat), not the fs block size */
 	inode->i_blocks = 0;
-	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
+	inode->i_mtime = inode->i_atime = inode->i_ctime = ei->i_crtime =
+						       ext4_current_time(inode);
 
 	memset(ei->i_data, 0, sizeof(ei->i_data));
 	ei->i_dir_start_lookup = 0;
@@ -595,9 +596,8 @@ got:
 	spin_unlock(&sbi->s_next_gen_lock);
 
 	ei->i_state = EXT4_STATE_NEW;
-	ei->i_extra_isize =
-		(EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) ?
-		sizeof(struct ext4_inode) - EXT4_GOOD_OLD_INODE_SIZE : 0;
+
+	ei->i_extra_isize = EXT4_SB(sb)->s_want_extra_isize;
 
 	ret = inode;
 	if(DQUOT_ALLOC_INODE(inode)) {
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 0bcf62a..de26c25 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -726,7 +726,7 @@ static int ext4_splice_branch(handle_t *handle, struct inode *inode,
 
 	/* We are done with atomic stuff, now do the rest of housekeeping */
 
-	inode->i_ctime = CURRENT_TIME_SEC;
+	inode->i_ctime = ext4_current_time(inode);
 	ext4_mark_inode_dirty(handle, inode);
 
 	/* had we spliced it onto indirect block? */
@@ -1766,7 +1766,6 @@ int ext4_block_truncate_page(handle_t *handle, struct page *page,
 	struct inode *inode = mapping->host;
 	struct buffer_head *bh;
 	int err = 0;
-	void *kaddr;
 
 	blocksize = inode->i_sb->s_blocksize;
 	length = blocksize - (offset & (blocksize - 1));
@@ -1778,10 +1777,7 @@ int ext4_block_truncate_page(handle_t *handle, struct page *page,
 	 */
 	if (!page_has_buffers(page) && test_opt(inode->i_sb, NOBH) &&
 	     ext4_should_writeback_data(inode) && PageUptodate(page)) {
-		kaddr = kmap_atomic(page, KM_USER0);
-		memset(kaddr + offset, 0, length);
-		flush_dcache_page(page);
-		kunmap_atomic(kaddr, KM_USER0);
+		zero_user_page(page, offset, length, KM_USER0);
 		set_page_dirty(page);
 		goto unlock;
 	}
@@ -1834,10 +1830,7 @@ int ext4_block_truncate_page(handle_t *handle, struct page *page,
 			goto unlock;
 	}
 
-	kaddr = kmap_atomic(page, KM_USER0);
-	memset(kaddr + offset, 0, length);
-	flush_dcache_page(page);
-	kunmap_atomic(kaddr, KM_USER0);
+	zero_user_page(page, offset, length, KM_USER0);
 
 	BUFFER_TRACE(bh, "zeroed end of block");
 
@@ -2375,7 +2368,7 @@ do_indirects:
 	ext4_discard_reservation(inode);
 
 	mutex_unlock(&ei->truncate_mutex);
-	inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
+	inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
 	ext4_mark_inode_dirty(handle, inode);
 
 	/*
@@ -2583,6 +2576,25 @@ void ext4_set_inode_flags(struct inode *inode)
 		inode->i_flags |= S_DIRSYNC;
 }
 
+/* Propagate flags from i_flags to EXT4_I(inode)->i_flags */
+void ext4_get_inode_flags(struct ext4_inode_info *ei)
+{
+	unsigned int flags = ei->vfs_inode.i_flags;
+
+	ei->i_flags &= ~(EXT4_SYNC_FL|EXT4_APPEND_FL|
+			EXT4_IMMUTABLE_FL|EXT4_NOATIME_FL|EXT4_DIRSYNC_FL);
+	if (flags & S_SYNC)
+		ei->i_flags |= EXT4_SYNC_FL;
+	if (flags & S_APPEND)
+		ei->i_flags |= EXT4_APPEND_FL;
+	if (flags & S_IMMUTABLE)
+		ei->i_flags |= EXT4_IMMUTABLE_FL;
+	if (flags & S_NOATIME)
+		ei->i_flags |= EXT4_NOATIME_FL;
+	if (flags & S_DIRSYNC)
+		ei->i_flags |= EXT4_DIRSYNC_FL;
+}
+
 void ext4_read_inode(struct inode * inode)
 {
 	struct ext4_iloc iloc;
@@ -2610,10 +2622,6 @@ void ext4_read_inode(struct inode * inode)
 	}
 	inode->i_nlink = le16_to_cpu(raw_inode->i_links_count);
 	inode->i_size = le32_to_cpu(raw_inode->i_size);
-	inode->i_atime.tv_sec = (signed)le32_to_cpu(raw_inode->i_atime);
-	inode->i_ctime.tv_sec = (signed)le32_to_cpu(raw_inode->i_ctime);
-	inode->i_mtime.tv_sec = (signed)le32_to_cpu(raw_inode->i_mtime);
-	inode->i_atime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_mtime.tv_nsec = 0;
 
 	ei->i_state = 0;
 	ei->i_dir_start_lookup = 0;
@@ -2673,8 +2681,10 @@ void ext4_read_inode(struct inode * inode)
 		 */
 		ei->i_extra_isize = le16_to_cpu(raw_inode->i_extra_isize);
 		if (EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize >
-		    EXT4_INODE_SIZE(inode->i_sb))
+		    EXT4_INODE_SIZE(inode->i_sb)) {
+			brelse (bh);
 			goto bad_inode;
+		}
 		if (ei->i_extra_isize == 0) {
 			/* The extra space is currently unused. Use it. */
 			ei->i_extra_isize = sizeof(struct ext4_inode) -
@@ -2689,6 +2699,11 @@ void ext4_read_inode(struct inode * inode)
 	} else
 		ei->i_extra_isize = 0;
 
+	EXT4_INODE_GET_XTIME(i_ctime, inode, raw_inode);
+	EXT4_INODE_GET_XTIME(i_mtime, inode, raw_inode);
+	EXT4_INODE_GET_XTIME(i_atime, inode, raw_inode);
+	EXT4_EINODE_GET_XTIME(i_crtime, ei, raw_inode);
+
 	if (S_ISREG(inode->i_mode)) {
 		inode->i_op = &ext4_file_inode_operations;
 		inode->i_fop = &ext4_file_operations;
@@ -2742,6 +2757,7 @@ static int ext4_do_update_inode(handle_t *handle,
 	if (ei->i_state & EXT4_STATE_NEW)
 		memset(raw_inode, 0, EXT4_SB(inode->i_sb)->s_inode_size);
 
+	ext4_get_inode_flags(ei);
 	raw_inode->i_mode = cpu_to_le16(inode->i_mode);
 	if(!(test_opt(inode->i_sb, NO_UID32))) {
 		raw_inode->i_uid_low = cpu_to_le16(low_16_bits(inode->i_uid));
@@ -2769,9 +2785,12 @@ static int ext4_do_update_inode(handle_t *handle,
 	}
 	raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
 	raw_inode->i_size = cpu_to_le32(ei->i_disksize);
-	raw_inode->i_atime = cpu_to_le32(inode->i_atime.tv_sec);
-	raw_inode->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec);
-	raw_inode->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec);
+
+	EXT4_INODE_SET_XTIME(i_ctime, inode, raw_inode);
+	EXT4_INODE_SET_XTIME(i_mtime, inode, raw_inode);
+	EXT4_INODE_SET_XTIME(i_atime, inode, raw_inode);
+	EXT4_EINODE_SET_XTIME(i_crtime, ei, raw_inode);
+
 	raw_inode->i_blocks = cpu_to_le32(inode->i_blocks);
 	raw_inode->i_dtime = cpu_to_le32(ei->i_dtime);
 	raw_inode->i_flags = cpu_to_le32(ei->i_flags);
@@ -3080,6 +3099,39 @@ ext4_reserve_inode_write(handle_t *handle, struct inode *inode,
 }
 
 /*
+ * Expand an inode by new_extra_isize bytes.
+ * Returns 0 on success or negative error number on failure.
+ */
+int ext4_expand_extra_isize(struct inode *inode, unsigned int new_extra_isize,
+			struct ext4_iloc iloc, handle_t *handle)
+{
+	struct ext4_inode *raw_inode;
+	struct ext4_xattr_ibody_header *header;
+	struct ext4_xattr_entry *entry;
+
+	if (EXT4_I(inode)->i_extra_isize >= new_extra_isize)
+		return 0;
+
+	raw_inode = ext4_raw_inode(&iloc);
+
+	header = IHDR(inode, raw_inode);
+	entry = IFIRST(header);
+
+	/* No extended attributes present */
+	if (!(EXT4_I(inode)->i_state & EXT4_STATE_XATTR) ||
+		header->h_magic != cpu_to_le32(EXT4_XATTR_MAGIC)) {
+		memset((void *)raw_inode + EXT4_GOOD_OLD_INODE_SIZE, 0,
+			new_extra_isize);
+		EXT4_I(inode)->i_extra_isize = new_extra_isize;
+		return 0;
+	}
+
+	/* try to expand with EAs present */
+	return ext4_expand_extra_isize_ea(inode, new_extra_isize,
+					  raw_inode, handle);
+}
+
+/*
  * What we do here is to mark the in-core inode as clean with respect to inode
  * dirtiness (it may still be data-dirty).
  * This means that the in-core inode may be reaped by prune_icache
@@ -3103,10 +3155,38 @@ ext4_reserve_inode_write(handle_t *handle, struct inode *inode,
 int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode)
 {
 	struct ext4_iloc iloc;
-	int err;
+	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
+	static unsigned int mnt_count;
+	int err, ret;
 
 	might_sleep();
 	err = ext4_reserve_inode_write(handle, inode, &iloc);
+	if (EXT4_I(inode)->i_extra_isize < sbi->s_want_extra_isize &&
+	    !(EXT4_I(inode)->i_state & EXT4_STATE_NO_EXPAND)) {
+		/*
+		 * We need extra buffer credits since we may write into EA block
+		 * with this same handle. If journal_extend fails, then it will
+		 * only result in a minor loss of functionality for that inode.
+		 * If this is felt to be critical, then e2fsck should be run to
+		 * force a large enough s_min_extra_isize.
+		 */
+		if ((jbd2_journal_extend(handle,
+			     EXT4_DATA_TRANS_BLOCKS(inode->i_sb))) == 0) {
+			ret = ext4_expand_extra_isize(inode,
+						      sbi->s_want_extra_isize,
+						      iloc, handle);
+			if (ret) {
+				EXT4_I(inode)->i_state |= EXT4_STATE_NO_EXPAND;
+				if (mnt_count != sbi->s_es->s_mnt_count) {
+					ext4_warning(inode->i_sb, __FUNCTION__,
+					"Unable to expand inode %lu. Delete"
+					" some EAs or run e2fsck.",
+					inode->i_ino);
+					mnt_count = sbi->s_es->s_mnt_count;
+				}
+			}
+		}
+	}
 	if (!err)
 		err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 	return err;
@@ -3195,7 +3275,7 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
 	 */
 
 	journal = EXT4_JOURNAL(inode);
-	if (is_journal_aborted(journal) || IS_RDONLY(inode))
+	if (is_journal_aborted(journal))
 		return -EROFS;
 
 	jbd2_journal_lock_updates(journal);
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 500567d..c04c7cc 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -28,6 +28,7 @@ int ext4_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
 
 	switch (cmd) {
 	case EXT4_IOC_GETFLAGS:
+		ext4_get_inode_flags(ei);
 		flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
 		return put_user(flags, (int __user *) arg);
 	case EXT4_IOC_SETFLAGS: {
@@ -40,7 +41,7 @@ int ext4_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
 		if (IS_RDONLY(inode))
 			return -EROFS;
 
-		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+		if (!is_owner_or_cap(inode))
 			return -EACCES;
 
 		if (get_user(flags, (int __user *) arg))
@@ -96,7 +97,7 @@ int ext4_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
 		ei->i_flags = flags;
 
 		ext4_set_inode_flags(inode);
-		inode->i_ctime = CURRENT_TIME_SEC;
+		inode->i_ctime = ext4_current_time(inode);
 
 		err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 flags_err:
@@ -121,7 +122,7 @@ flags_err:
 		__u32 generation;
 		int err;
 
-		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+		if (!is_owner_or_cap(inode))
 			return -EPERM;
 		if (IS_RDONLY(inode))
 			return -EROFS;
@@ -133,14 +134,14 @@ flags_err:
 			return PTR_ERR(handle);
 		err = ext4_reserve_inode_write(handle, inode, &iloc);
 		if (err == 0) {
-			inode->i_ctime = CURRENT_TIME_SEC;
+			inode->i_ctime = ext4_current_time(inode);
 			inode->i_generation = generation;
 			err = ext4_mark_iloc_dirty(handle, inode, &iloc);
 		}
 		ext4_journal_stop(handle);
 		return err;
 	}
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
 	case EXT4_IOC_WAIT_FOR_READONLY:
 		/*
 		 * This is racy - by the time we're woken up and running,
@@ -180,7 +181,7 @@ flags_err:
 		if (IS_RDONLY(inode))
 			return -EROFS;
 
-		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+		if (!is_owner_or_cap(inode))
 			return -EACCES;
 
 		if (get_user(rsv_window_size, (int __user *)arg))
@@ -282,7 +283,7 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	case EXT4_IOC32_SETVERSION_OLD:
 		cmd = EXT4_IOC_SETVERSION_OLD;
 		break;
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
 	case EXT4_IOC32_WAIT_FOR_READONLY:
 		cmd = EXT4_IOC_WAIT_FOR_READONLY;
 		break;
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 2811e57..da22497 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1017,6 +1017,11 @@ static struct dentry *ext4_lookup(struct inode * dir, struct dentry *dentry, str
 
 		if (!inode)
 			return ERR_PTR(-EACCES);
+
+		if (is_bad_inode(inode)) {
+			iput(inode);
+			return ERR_PTR(-ENOENT);
+		}
 	}
 	return d_splice_alias(inode, dentry);
 }
@@ -1052,6 +1057,11 @@ struct dentry *ext4_get_parent(struct dentry *child)
 	if (!inode)
 		return ERR_PTR(-EACCES);
 
+	if (is_bad_inode(inode)) {
+		iput(inode);
+		return ERR_PTR(-ENOENT);
+	}
+
 	parent = d_alloc_anon(inode);
 	if (!parent) {
 		iput(inode);
@@ -1285,7 +1295,7 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
 	 * happen is that the times are slightly out of date
 	 * and/or different from the directory change time.
 	 */
-	dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
+	dir->i_mtime = dir->i_ctime = ext4_current_time(dir);
 	ext4_update_dx_flag(dir);
 	dir->i_version++;
 	ext4_mark_inode_dirty(handle, dir);
@@ -1619,6 +1629,35 @@ static int ext4_delete_entry (handle_t *handle,
 	return -ENOENT;
 }
 
+/*
+ * DIR_NLINK feature is set if 1) nlinks > EXT4_LINK_MAX or 2) nlinks == 2,
+ * since this indicates that nlinks count was previously 1.
+ */
+static void ext4_inc_count(handle_t *handle, struct inode *inode)
+{
+	inc_nlink(inode);
+	if (is_dx(inode) && inode->i_nlink > 1) {
+		/* limit is 16-bit i_links_count */
+		if (inode->i_nlink >= EXT4_LINK_MAX || inode->i_nlink == 2) {
+			inode->i_nlink = 1;
+			EXT4_SET_RO_COMPAT_FEATURE(inode->i_sb,
+					      EXT4_FEATURE_RO_COMPAT_DIR_NLINK);
+		}
+	}
+}
+
+/*
+ * If a directory had nlink == 1, then we should let it be 1. This indicates
+ * directory has >EXT4_LINK_MAX subdirs.
+ */
+static void ext4_dec_count(handle_t *handle, struct inode *inode)
+{
+	drop_nlink(inode);
+	if (S_ISDIR(inode->i_mode) && inode->i_nlink == 0)
+		inc_nlink(inode);
+}
+
+
 static int ext4_add_nondir(handle_t *handle,
 		struct dentry *dentry, struct inode *inode)
 {
@@ -1715,7 +1754,7 @@ static int ext4_mkdir(struct inode * dir, struct dentry * dentry, int mode)
 	struct ext4_dir_entry_2 * de;
 	int err, retries = 0;
 
-	if (dir->i_nlink >= EXT4_LINK_MAX)
+	if (EXT4_DIR_LINK_MAX(dir))
 		return -EMLINK;
 
 retry:
@@ -1738,7 +1777,7 @@ retry:
 	inode->i_size = EXT4_I(inode)->i_disksize = inode->i_sb->s_blocksize;
 	dir_block = ext4_bread (handle, inode, 0, 1, &err);
 	if (!dir_block) {
-		drop_nlink(inode); /* is this nlink == 0? */
+		ext4_dec_count(handle, inode); /* is this nlink == 0? */
 		ext4_mark_inode_dirty(handle, inode);
 		iput (inode);
 		goto out_stop;
@@ -1770,7 +1809,7 @@ retry:
 		iput (inode);
 		goto out_stop;
 	}
-	inc_nlink(dir);
+	ext4_inc_count(handle, dir);
 	ext4_update_dx_flag(dir);
 	ext4_mark_inode_dirty(handle, dir);
 	d_instantiate(dentry, inode);
@@ -2035,9 +2074,9 @@ static int ext4_rmdir (struct inode * dir, struct dentry *dentry)
 	retval = ext4_delete_entry(handle, dir, de, bh);
 	if (retval)
 		goto end_rmdir;
-	if (inode->i_nlink != 2)
+	if (!EXT4_DIR_LINK_EMPTY(inode))
 		ext4_warning (inode->i_sb, "ext4_rmdir",
-			      "empty directory has nlink!=2 (%d)",
+			      "empty directory has too many links (%d)",
 			      inode->i_nlink);
 	inode->i_version++;
 	clear_nlink(inode);
@@ -2046,9 +2085,9 @@ static int ext4_rmdir (struct inode * dir, struct dentry *dentry)
 	 * recovery. */
 	inode->i_size = 0;
 	ext4_orphan_add(handle, inode);
-	inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
+	inode->i_ctime = dir->i_ctime = dir->i_mtime = ext4_current_time(inode);
 	ext4_mark_inode_dirty(handle, inode);
-	drop_nlink(dir);
+	ext4_dec_count(handle, dir);
 	ext4_update_dx_flag(dir);
 	ext4_mark_inode_dirty(handle, dir);
 
@@ -2096,13 +2135,13 @@ static int ext4_unlink(struct inode * dir, struct dentry *dentry)
 	retval = ext4_delete_entry(handle, dir, de, bh);
 	if (retval)
 		goto end_unlink;
-	dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
+	dir->i_ctime = dir->i_mtime = ext4_current_time(dir);
 	ext4_update_dx_flag(dir);
 	ext4_mark_inode_dirty(handle, dir);
-	drop_nlink(inode);
+	ext4_dec_count(handle, inode);
 	if (!inode->i_nlink)
 		ext4_orphan_add(handle, inode);
-	inode->i_ctime = dir->i_ctime;
+	inode->i_ctime = ext4_current_time(inode);
 	ext4_mark_inode_dirty(handle, inode);
 	retval = 0;
 
@@ -2149,7 +2188,7 @@ retry:
 		err = __page_symlink(inode, symname, l,
 				mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
 		if (err) {
-			drop_nlink(inode);
+			ext4_dec_count(handle, inode);
 			ext4_mark_inode_dirty(handle, inode);
 			iput (inode);
 			goto out_stop;
@@ -2175,8 +2214,9 @@ static int ext4_link (struct dentry * old_dentry,
 	struct inode *inode = old_dentry->d_inode;
 	int err, retries = 0;
 
-	if (inode->i_nlink >= EXT4_LINK_MAX)
+	if (EXT4_DIR_LINK_MAX(inode))
 		return -EMLINK;
+
 	/*
 	 * Return -ENOENT if we've raced with unlink and i_nlink is 0.  Doing
 	 * otherwise has the potential to corrupt the orphan inode list.
@@ -2193,8 +2233,8 @@ retry:
 	if (IS_DIRSYNC(dir))
 		handle->h_sync = 1;
 
-	inode->i_ctime = CURRENT_TIME_SEC;
-	inc_nlink(inode);
+	inode->i_ctime = ext4_current_time(inode);
+	ext4_inc_count(handle, inode);
 	atomic_inc(&inode->i_count);
 
 	err = ext4_add_nondir(handle, dentry, inode);
@@ -2295,7 +2335,7 @@ static int ext4_rename (struct inode * old_dir, struct dentry *old_dentry,
 	 * Like most other Unix systems, set the ctime for inodes on a
 	 * rename.
 	 */
-	old_inode->i_ctime = CURRENT_TIME_SEC;
+	old_inode->i_ctime = ext4_current_time(old_inode);
 	ext4_mark_inode_dirty(handle, old_inode);
 
 	/*
@@ -2327,10 +2367,10 @@ static int ext4_rename (struct inode * old_dir, struct dentry *old_dentry,
 	}
 
 	if (new_inode) {
-		drop_nlink(new_inode);
-		new_inode->i_ctime = CURRENT_TIME_SEC;
+		ext4_dec_count(handle, new_inode);
+		new_inode->i_ctime = ext4_current_time(new_inode);
 	}
-	old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME_SEC;
+	old_dir->i_ctime = old_dir->i_mtime = ext4_current_time(old_dir);
 	ext4_update_dx_flag(old_dir);
 	if (dir_bh) {
 		BUFFER_TRACE(dir_bh, "get_write_access");
@@ -2338,11 +2378,13 @@ static int ext4_rename (struct inode * old_dir, struct dentry *old_dentry,
 		PARENT_INO(dir_bh->b_data) = cpu_to_le32(new_dir->i_ino);
 		BUFFER_TRACE(dir_bh, "call ext4_journal_dirty_metadata");
 		ext4_journal_dirty_metadata(handle, dir_bh);
-		drop_nlink(old_dir);
+		ext4_dec_count(handle, old_dir);
 		if (new_inode) {
-			drop_nlink(new_inode);
+			/* checked empty_dir above, can't have another parent,
+			 * ext3_dec_count() won't work for many-linked dirs */
+			new_inode->i_nlink = 0;
 		} else {
-			inc_nlink(new_dir);
+			ext4_inc_count(handle, new_dir);
 			ext4_update_dx_flag(new_dir);
 			ext4_mark_inode_dirty(handle, new_dir);
 		}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 175b68c..6dcbb28 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -29,12 +29,14 @@
 #include <linux/parser.h>
 #include <linux/smp_lock.h>
 #include <linux/buffer_head.h>
+#include <linux/exportfs.h>
 #include <linux/vfs.h>
 #include <linux/random.h>
 #include <linux/mount.h>
 #include <linux/namei.h>
 #include <linux/quotaops.h>
 #include <linux/seq_file.h>
+#include <linux/log2.h>
 
 #include <asm/uaccess.h>
 
@@ -510,6 +512,14 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
 
 static void ext4_destroy_inode(struct inode *inode)
 {
+	if (!list_empty(&(EXT4_I(inode)->i_orphan))) {
+		printk("EXT4 Inode %p: orphan list check failed!\n",
+			EXT4_I(inode));
+		print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4,
+				EXT4_I(inode), sizeof(struct ext4_inode_info),
+				true);
+		dump_stack();
+	}
 	kmem_cache_free(ext4_inode_cachep, EXT4_I(inode));
 }
 
@@ -725,7 +735,7 @@ enum {
 	Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
 	Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
 	Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota,
-	Opt_grpquota, Opt_extents,
+	Opt_grpquota, Opt_extents, Opt_noextents,
 };
 
 static match_table_t tokens = {
@@ -776,6 +786,7 @@ static match_table_t tokens = {
 	{Opt_usrquota, "usrquota"},
 	{Opt_barrier, "barrier=%u"},
 	{Opt_extents, "extents"},
+	{Opt_noextents, "noextents"},
 	{Opt_err, NULL},
 	{Opt_resize, "resize"},
 };
@@ -1111,6 +1122,9 @@ clear_qf_name:
 		case Opt_extents:
 			set_opt (sbi->s_mount_opt, EXTENTS);
 			break;
+		case Opt_noextents:
+			clear_opt (sbi->s_mount_opt, EXTENTS);
+			break;
 		default:
 			printk (KERN_ERR
 				"EXT4-fs: Unrecognized mount option \"%s\" "
@@ -1542,6 +1556,12 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
 
 	set_opt(sbi->s_mount_opt, RESERVATION);
 
+	/*
+	 * turn on extents feature by default in ext4 filesystem
+	 * User -o noextents to turn it off
+	 */
+	set_opt(sbi->s_mount_opt, EXTENTS);
+
 	if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum,
 			    NULL, 0))
 		goto failed_mount;
@@ -1625,13 +1645,15 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
 		sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
 		sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
 		if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) ||
-		    (sbi->s_inode_size & (sbi->s_inode_size - 1)) ||
+		    (!is_power_of_2(sbi->s_inode_size)) ||
 		    (sbi->s_inode_size > blocksize)) {
 			printk (KERN_ERR
 				"EXT4-fs: unsupported inode size: %d\n",
 				sbi->s_inode_size);
 			goto failed_mount;
 		}
+		if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE)
+			sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2);
 	}
 	sbi->s_frag_size = EXT4_MIN_FRAG_SIZE <<
 				   le32_to_cpu(es->s_log_frag_size);
@@ -1794,6 +1816,13 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
 		goto failed_mount3;
 	}
 
+	if (ext4_blocks_count(es) > 0xffffffffULL &&
+	    !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,
+				       JBD2_FEATURE_INCOMPAT_64BIT)) {
+		printk(KERN_ERR "ext4: Failed to set 64-bit journal feature\n");
+		goto failed_mount4;
+	}
+
 	/* We have now updated the journal if required, so we can
 	 * validate the data journaling mode. */
 	switch (test_opt(sb, DATA_FLAGS)) {
@@ -1848,6 +1877,32 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
 	}
 
 	ext4_setup_super (sb, es, sb->s_flags & MS_RDONLY);
+
+	/* determine the minimum size of new large inodes, if present */
+	if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) {
+		sbi->s_want_extra_isize = sizeof(struct ext4_inode) -
+						     EXT4_GOOD_OLD_INODE_SIZE;
+		if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
+				       EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) {
+			if (sbi->s_want_extra_isize <
+			    le16_to_cpu(es->s_want_extra_isize))
+				sbi->s_want_extra_isize =
+					le16_to_cpu(es->s_want_extra_isize);
+			if (sbi->s_want_extra_isize <
+			    le16_to_cpu(es->s_min_extra_isize))
+				sbi->s_want_extra_isize =
+					le16_to_cpu(es->s_min_extra_isize);
+		}
+	}
+	/* Check if enough inode space is available */
+	if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize >
+							sbi->s_inode_size) {
+		sbi->s_want_extra_isize = sizeof(struct ext4_inode) -
+						       EXT4_GOOD_OLD_INODE_SIZE;
+		printk(KERN_INFO "EXT4-fs: required extra inode space not"
+			"available.\n");
+	}
+
 	/*
 	 * akpm: core read_super() calls in here with the superblock locked.
 	 * That deadlocks, because orphan cleanup needs to lock the superblock
@@ -2150,6 +2205,7 @@ static int ext4_create_journal(struct super_block * sb,
 			       unsigned int journal_inum)
 {
 	journal_t *journal;
+	int err;
 
 	if (sb->s_flags & MS_RDONLY) {
 		printk(KERN_ERR "EXT4-fs: readonly filesystem when trying to "
@@ -2157,13 +2213,15 @@ static int ext4_create_journal(struct super_block * sb,
 		return -EROFS;
 	}
 
-	if (!(journal = ext4_get_journal(sb, journal_inum)))
+	journal = ext4_get_journal(sb, journal_inum);
+	if (!journal)
 		return -EINVAL;
 
 	printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n",
 	       journal_inum);
 
-	if (jbd2_journal_create(journal)) {
+	err = jbd2_journal_create(journal);
+	if (err) {
 		printk(KERN_ERR "EXT4-fs: error creating journal.\n");
 		jbd2_journal_destroy(journal);
 		return -EIO;
@@ -2214,12 +2272,14 @@ static void ext4_mark_recovery_complete(struct super_block * sb,
 
 	jbd2_journal_lock_updates(journal);
 	jbd2_journal_flush(journal);
+	lock_super(sb);
 	if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) &&
 	    sb->s_flags & MS_RDONLY) {
 		EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
 		sb->s_dirt = 0;
 		ext4_commit_super(sb, es, 1);
 	}
+	unlock_super(sb);
 	jbd2_journal_unlock_updates(journal);
 }
 
@@ -2408,7 +2468,13 @@ static int ext4_remount (struct super_block * sb, int * flags, char * data)
 			    (sbi->s_mount_state & EXT4_VALID_FS))
 				es->s_state = cpu_to_le16(sbi->s_mount_state);
 
+			/*
+			 * We have to unlock super so that we can wait for
+			 * transactions.
+			 */
+			unlock_super(sb);
 			ext4_mark_recovery_complete(sb, es);
+			lock_super(sb);
 		} else {
 			__le32 ret;
 			if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb,
@@ -2481,19 +2547,19 @@ static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf)
 	struct super_block *sb = dentry->d_sb;
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	struct ext4_super_block *es = sbi->s_es;
-	ext4_fsblk_t overhead;
-	int i;
 	u64 fsid;
 
-	if (test_opt (sb, MINIX_DF))
-		overhead = 0;
-	else {
-		unsigned long ngroups;
-		ngroups = EXT4_SB(sb)->s_groups_count;
+	if (test_opt(sb, MINIX_DF)) {
+		sbi->s_overhead_last = 0;
+	} else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
+		unsigned long ngroups = sbi->s_groups_count, i;
+		ext4_fsblk_t overhead = 0;
 		smp_rmb();
 
 		/*
-		 * Compute the overhead (FS structures)
+		 * Compute the overhead (FS structures).  This is constant
+		 * for a given filesystem unless the number of block groups
+		 * changes so we cache the previous value until it does.
 		 */
 
 		/*
@@ -2517,18 +2583,23 @@ static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf)
 		 * Every block group has an inode bitmap, a block
 		 * bitmap, and an inode table.
 		 */
-		overhead += (ngroups * (2 + EXT4_SB(sb)->s_itb_per_group));
+		overhead += ngroups * (2 + sbi->s_itb_per_group);
+		sbi->s_overhead_last = overhead;
+		smp_wmb();
+		sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count);
 	}
 
 	buf->f_type = EXT4_SUPER_MAGIC;
 	buf->f_bsize = sb->s_blocksize;
-	buf->f_blocks = ext4_blocks_count(es) - overhead;
+	buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last;
 	buf->f_bfree = percpu_counter_sum(&sbi->s_freeblocks_counter);
+	es->s_free_blocks_count = cpu_to_le32(buf->f_bfree);
 	buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es);
 	if (buf->f_bfree < ext4_r_blocks_count(es))
 		buf->f_bavail = 0;
 	buf->f_files = le32_to_cpu(es->s_inodes_count);
 	buf->f_ffree = percpu_counter_sum(&sbi->s_freeinodes_counter);
+	es->s_free_inodes_count = cpu_to_le32(buf->f_ffree);
 	buf->f_namelen = EXT4_NAME_LEN;
 	fsid = le64_to_cpup((void *)es->s_uuid) ^
 	       le64_to_cpup((void *)es->s_uuid + sizeof(u64));
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index e832e96..b10d68f 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -66,13 +66,6 @@
 #define BFIRST(bh) ENTRY(BHDR(bh)+1)
 #define IS_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0)
 
-#define IHDR(inode, raw_inode) \
-	((struct ext4_xattr_ibody_header *) \
-		((void *)raw_inode + \
-		 EXT4_GOOD_OLD_INODE_SIZE + \
-		 EXT4_I(inode)->i_extra_isize))
-#define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1))
-
 #ifdef EXT4_XATTR_DEBUG
 # define ea_idebug(inode, f...) do { \
 		printk(KERN_DEBUG "inode %s:%lu: ", \
@@ -508,6 +501,24 @@ out:
 	return;
 }
 
+/*
+ * Find the available free space for EAs. This also returns the total number of
+ * bytes used by EA entries.
+ */
+static size_t ext4_xattr_free_space(struct ext4_xattr_entry *last,
+				    size_t *min_offs, void *base, int *total)
+{
+	for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) {
+		*total += EXT4_XATTR_LEN(last->e_name_len);
+		if (!last->e_value_block && last->e_value_size) {
+			size_t offs = le16_to_cpu(last->e_value_offs);
+			if (offs < *min_offs)
+				*min_offs = offs;
+		}
+	}
+	return (*min_offs - ((void *)last - base) - sizeof(__u32));
+}
+
 struct ext4_xattr_info {
 	int name_index;
 	const char *name;
@@ -1013,7 +1024,9 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
 	}
 	if (!error) {
 		ext4_xattr_update_super_block(handle, inode->i_sb);
-		inode->i_ctime = CURRENT_TIME_SEC;
+		inode->i_ctime = ext4_current_time(inode);
+		if (!value)
+			EXT4_I(inode)->i_state &= ~EXT4_STATE_NO_EXPAND;
 		error = ext4_mark_iloc_dirty(handle, inode, &is.iloc);
 		/*
 		 * The bh is consumed by ext4_mark_iloc_dirty, even with
@@ -1067,6 +1080,253 @@ retry:
 }
 
 /*
+ * Shift the EA entries in the inode to create space for the increased
+ * i_extra_isize.
+ */
+static void ext4_xattr_shift_entries(struct ext4_xattr_entry *entry,
+				     int value_offs_shift, void *to,
+				     void *from, size_t n, int blocksize)
+{
+	struct ext4_xattr_entry *last = entry;
+	int new_offs;
+
+	/* Adjust the value offsets of the entries */
+	for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) {
+		if (!last->e_value_block && last->e_value_size) {
+			new_offs = le16_to_cpu(last->e_value_offs) +
+							value_offs_shift;
+			BUG_ON(new_offs + le32_to_cpu(last->e_value_size)
+				 > blocksize);
+			last->e_value_offs = cpu_to_le16(new_offs);
+		}
+	}
+	/* Shift the entries by n bytes */
+	memmove(to, from, n);
+}
+
+/*
+ * Expand an inode by new_extra_isize bytes when EAs are present.
+ * Returns 0 on success or negative error number on failure.
+ */
+int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
+			       struct ext4_inode *raw_inode, handle_t *handle)
+{
+	struct ext4_xattr_ibody_header *header;
+	struct ext4_xattr_entry *entry, *last, *first;
+	struct buffer_head *bh = NULL;
+	struct ext4_xattr_ibody_find *is = NULL;
+	struct ext4_xattr_block_find *bs = NULL;
+	char *buffer = NULL, *b_entry_name = NULL;
+	size_t min_offs, free;
+	int total_ino, total_blk;
+	void *base, *start, *end;
+	int extra_isize = 0, error = 0, tried_min_extra_isize = 0;
+	int s_min_extra_isize = EXT4_SB(inode->i_sb)->s_es->s_min_extra_isize;
+
+	down_write(&EXT4_I(inode)->xattr_sem);
+retry:
+	if (EXT4_I(inode)->i_extra_isize >= new_extra_isize) {
+		up_write(&EXT4_I(inode)->xattr_sem);
+		return 0;
+	}
+
+	header = IHDR(inode, raw_inode);
+	entry = IFIRST(header);
+
+	/*
+	 * Check if enough free space is available in the inode to shift the
+	 * entries ahead by new_extra_isize.
+	 */
+
+	base = start = entry;
+	end = (void *)raw_inode + EXT4_SB(inode->i_sb)->s_inode_size;
+	min_offs = end - base;
+	last = entry;
+	total_ino = sizeof(struct ext4_xattr_ibody_header);
+
+	free = ext4_xattr_free_space(last, &min_offs, base, &total_ino);
+	if (free >= new_extra_isize) {
+		entry = IFIRST(header);
+		ext4_xattr_shift_entries(entry,	EXT4_I(inode)->i_extra_isize
+				- new_extra_isize, (void *)raw_inode +
+				EXT4_GOOD_OLD_INODE_SIZE + new_extra_isize,
+				(void *)header, total_ino,
+				inode->i_sb->s_blocksize);
+		EXT4_I(inode)->i_extra_isize = new_extra_isize;
+		error = 0;
+		goto cleanup;
+	}
+
+	/*
+	 * Enough free space isn't available in the inode, check if
+	 * EA block can hold new_extra_isize bytes.
+	 */
+	if (EXT4_I(inode)->i_file_acl) {
+		bh = sb_bread(inode->i_sb, EXT4_I(inode)->i_file_acl);
+		error = -EIO;
+		if (!bh)
+			goto cleanup;
+		if (ext4_xattr_check_block(bh)) {
+			ext4_error(inode->i_sb, __FUNCTION__,
+				"inode %lu: bad block %llu", inode->i_ino,
+				EXT4_I(inode)->i_file_acl);
+			error = -EIO;
+			goto cleanup;
+		}
+		base = BHDR(bh);
+		first = BFIRST(bh);
+		end = bh->b_data + bh->b_size;
+		min_offs = end - base;
+		free = ext4_xattr_free_space(first, &min_offs, base,
+					     &total_blk);
+		if (free < new_extra_isize) {
+			if (!tried_min_extra_isize && s_min_extra_isize) {
+				tried_min_extra_isize++;
+				new_extra_isize = s_min_extra_isize;
+				brelse(bh);
+				goto retry;
+			}
+			error = -1;
+			goto cleanup;
+		}
+	} else {
+		free = inode->i_sb->s_blocksize;
+	}
+
+	while (new_extra_isize > 0) {
+		size_t offs, size, entry_size;
+		struct ext4_xattr_entry *small_entry = NULL;
+		struct ext4_xattr_info i = {
+			.value = NULL,
+			.value_len = 0,
+		};
+		unsigned int total_size;  /* EA entry size + value size */
+		unsigned int shift_bytes; /* No. of bytes to shift EAs by? */
+		unsigned int min_total_size = ~0U;
+
+		is = kzalloc(sizeof(struct ext4_xattr_ibody_find), GFP_NOFS);
+		bs = kzalloc(sizeof(struct ext4_xattr_block_find), GFP_NOFS);
+		if (!is || !bs) {
+			error = -ENOMEM;
+			goto cleanup;
+		}
+
+		is->s.not_found = -ENODATA;
+		bs->s.not_found = -ENODATA;
+		is->iloc.bh = NULL;
+		bs->bh = NULL;
+
+		last = IFIRST(header);
+		/* Find the entry best suited to be pushed into EA block */
+		entry = NULL;
+		for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) {
+			total_size =
+			EXT4_XATTR_SIZE(le32_to_cpu(last->e_value_size)) +
+					EXT4_XATTR_LEN(last->e_name_len);
+			if (total_size <= free && total_size < min_total_size) {
+				if (total_size < new_extra_isize) {
+					small_entry = last;
+				} else {
+					entry = last;
+					min_total_size = total_size;
+				}
+			}
+		}
+
+		if (entry == NULL) {
+			if (small_entry) {
+				entry = small_entry;
+			} else {
+				if (!tried_min_extra_isize &&
+				    s_min_extra_isize) {
+					tried_min_extra_isize++;
+					new_extra_isize = s_min_extra_isize;
+					goto retry;
+				}
+				error = -1;
+				goto cleanup;
+			}
+		}
+		offs = le16_to_cpu(entry->e_value_offs);
+		size = le32_to_cpu(entry->e_value_size);
+		entry_size = EXT4_XATTR_LEN(entry->e_name_len);
+		i.name_index = entry->e_name_index,
+		buffer = kmalloc(EXT4_XATTR_SIZE(size), GFP_NOFS);
+		b_entry_name = kmalloc(entry->e_name_len + 1, GFP_NOFS);
+		if (!buffer || !b_entry_name) {
+			error = -ENOMEM;
+			goto cleanup;
+		}
+		/* Save the entry name and the entry value */
+		memcpy(buffer, (void *)IFIRST(header) + offs,
+		       EXT4_XATTR_SIZE(size));
+		memcpy(b_entry_name, entry->e_name, entry->e_name_len);
+		b_entry_name[entry->e_name_len] = '\0';
+		i.name = b_entry_name;
+
+		error = ext4_get_inode_loc(inode, &is->iloc);
+		if (error)
+			goto cleanup;
+
+		error = ext4_xattr_ibody_find(inode, &i, is);
+		if (error)
+			goto cleanup;
+
+		/* Remove the chosen entry from the inode */
+		error = ext4_xattr_ibody_set(handle, inode, &i, is);
+
+		entry = IFIRST(header);
+		if (entry_size + EXT4_XATTR_SIZE(size) >= new_extra_isize)
+			shift_bytes = new_extra_isize;
+		else
+			shift_bytes = entry_size + size;
+		/* Adjust the offsets and shift the remaining entries ahead */
+		ext4_xattr_shift_entries(entry, EXT4_I(inode)->i_extra_isize -
+			shift_bytes, (void *)raw_inode +
+			EXT4_GOOD_OLD_INODE_SIZE + extra_isize + shift_bytes,
+			(void *)header, total_ino - entry_size,
+			inode->i_sb->s_blocksize);
+
+		extra_isize += shift_bytes;
+		new_extra_isize -= shift_bytes;
+		EXT4_I(inode)->i_extra_isize = extra_isize;
+
+		i.name = b_entry_name;
+		i.value = buffer;
+		i.value_len = cpu_to_le32(size);
+		error = ext4_xattr_block_find(inode, &i, bs);
+		if (error)
+			goto cleanup;
+
+		/* Add entry which was removed from the inode into the block */
+		error = ext4_xattr_block_set(handle, inode, &i, bs);
+		if (error)
+			goto cleanup;
+		kfree(b_entry_name);
+		kfree(buffer);
+		brelse(is->iloc.bh);
+		kfree(is);
+		kfree(bs);
+	}
+	brelse(bh);
+	up_write(&EXT4_I(inode)->xattr_sem);
+	return 0;
+
+cleanup:
+	kfree(b_entry_name);
+	kfree(buffer);
+	if (is)
+		brelse(is->iloc.bh);
+	kfree(is);
+	kfree(bs);
+	brelse(bh);
+	up_write(&EXT4_I(inode)->xattr_sem);
+	return error;
+}
+
+
+
+/*
  * ext4_xattr_delete_inode()
  *
  * Free extended attribute resources associated with this inode. This
diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index 79432b3..d7f5d6a 100644
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -56,6 +56,13 @@ struct ext4_xattr_entry {
 #define EXT4_XATTR_SIZE(size) \
 	(((size) + EXT4_XATTR_ROUND) & ~EXT4_XATTR_ROUND)
 
+#define IHDR(inode, raw_inode) \
+	((struct ext4_xattr_ibody_header *) \
+		((void *)raw_inode + \
+		EXT4_GOOD_OLD_INODE_SIZE + \
+		EXT4_I(inode)->i_extra_isize))
+#define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1))
+
 # ifdef CONFIG_EXT4DEV_FS_XATTR
 
 extern struct xattr_handler ext4_xattr_user_handler;
@@ -74,6 +81,9 @@ extern int ext4_xattr_set_handle(handle_t *, struct inode *, int, const char *,
 extern void ext4_xattr_delete_inode(handle_t *, struct inode *);
 extern void ext4_xattr_put_super(struct super_block *);
 
+extern int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
+			    struct ext4_inode *raw_inode, handle_t *handle);
+
 extern int init_ext4_xattr(void);
 extern void exit_ext4_xattr(void);
 
@@ -129,6 +139,13 @@ exit_ext4_xattr(void)
 {
 }
 
+static inline int
+ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
+			    struct ext4_inode *raw_inode, handle_t *handle)
+{
+	return -EOPNOTSUPP;
+}
+
 #define ext4_xattr_handlers	NULL
 
 # endif  /* CONFIG_EXT4DEV_FS_XATTR */
diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index ccf161d..72cbcd6 100644
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -313,7 +313,7 @@ int fat_search_long(struct inode *inode, const unsigned char *name,
 	wchar_t bufuname[14];
 	unsigned char xlate_len, nr_slots;
 	wchar_t *unicode = NULL;
-	unsigned char work[8], bufname[260];	/* 256 + 4 */
+	unsigned char work[MSDOS_NAME], bufname[260];	/* 256 + 4 */
 	int uni_xlate = sbi->options.unicode_xlate;
 	int utf8 = sbi->options.utf8;
 	int anycase = (sbi->options.name_check != 's');
@@ -351,7 +351,8 @@ parse_record:
 		if (work[0] == 0x05)
 			work[0] = 0xE5;
 		for (i = 0, j = 0, last_u = 0; i < 8;) {
-			if (!work[i]) break;
+			if (!work[i])
+				break;
 			chl = fat_shortname2uni(nls_disk, &work[i], 8 - i,
 						&bufuname[j++], opt_shortname,
 						de->lcase & CASE_LOWER_BASE);
@@ -365,13 +366,15 @@ parse_record:
 		}
 		j = last_u;
 		fat_short2uni(nls_disk, ".", 1, &bufuname[j++]);
-		for (i = 0; i < 3;) {
-			if (!de->ext[i]) break;
-			chl = fat_shortname2uni(nls_disk, &de->ext[i], 3 - i,
+		for (i = 8; i < MSDOS_NAME;) {
+			if (!work[i])
+				break;
+			chl = fat_shortname2uni(nls_disk, &work[i],
+						MSDOS_NAME - i,
 						&bufuname[j++], opt_shortname,
 						de->lcase & CASE_LOWER_EXT);
 			if (chl <= 1) {
-				if (de->ext[i] != ' ')
+				if (work[i] != ' ')
 					last_u = j;
 			} else {
 				last_u = j;
@@ -445,7 +448,7 @@ static int __fat_readdir(struct inode *inode, struct file *filp, void *dirent,
 	int fill_len;
 	wchar_t bufuname[14];
 	wchar_t *unicode = NULL;
-	unsigned char c, work[8], bufname[56], *ptname = bufname;
+	unsigned char c, work[MSDOS_NAME], bufname[56], *ptname = bufname;
 	unsigned long lpos, dummy, *furrfu = &lpos;
 	int uni_xlate = sbi->options.unicode_xlate;
 	int isvfat = sbi->options.isvfat;
@@ -527,7 +530,8 @@ parse_record:
 	if (work[0] == 0x05)
 		work[0] = 0xE5;
 	for (i = 0, j = 0, last = 0, last_u = 0; i < 8;) {
-		if (!(c = work[i])) break;
+		if (!(c = work[i]))
+			break;
 		chl = fat_shortname2uni(nls_disk, &work[i], 8 - i,
 					&bufuname[j++], opt_shortname,
 					de->lcase & CASE_LOWER_BASE);
@@ -549,9 +553,10 @@ parse_record:
 	j = last_u;
 	fat_short2uni(nls_disk, ".", 1, &bufuname[j++]);
 	ptname[i++] = '.';
-	for (i2 = 0; i2 < 3;) {
-		if (!(c = de->ext[i2])) break;
-		chl = fat_shortname2uni(nls_disk, &de->ext[i2], 3 - i2,
+	for (i2 = 8; i2 < MSDOS_NAME;) {
+		if (!(c = work[i2]))
+			break;
+		chl = fat_shortname2uni(nls_disk, &work[i2], MSDOS_NAME - i2,
 					&bufuname[j++], opt_shortname,
 					de->lcase & CASE_LOWER_EXT);
 		if (chl <= 1) {
@@ -563,8 +568,8 @@ parse_record:
 			}
 		} else {
 			last_u = j;
-			for (chi = 0; chi < chl && i2 < 3; chi++) {
-				ptname[i++] = de->ext[i2++];
+			for (chi = 0; chi < chl && i2 < MSDOS_NAME; chi++) {
+				ptname[i++] = work[i2++];
 				last = i;
 			}
 		}
diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c
index ab171ea8..2c1b73f 100644
--- a/fs/fat/fatent.c
+++ b/fs/fat/fatent.c
@@ -17,6 +17,8 @@ struct fatent_operations {
 	int (*ent_next)(struct fat_entry *);
 };
 
+static DEFINE_SPINLOCK(fat12_entry_lock);
+
 static void fat12_ent_blocknr(struct super_block *sb, int entry,
 			      int *offset, sector_t *blocknr)
 {
@@ -116,10 +118,13 @@ static int fat12_ent_get(struct fat_entry *fatent)
 	u8 **ent12_p = fatent->u.ent12_p;
 	int next;
 
+	spin_lock(&fat12_entry_lock);
 	if (fatent->entry & 1)
 		next = (*ent12_p[0] >> 4) | (*ent12_p[1] << 4);
 	else
 		next = (*ent12_p[1] << 8) | *ent12_p[0];
+	spin_unlock(&fat12_entry_lock);
+
 	next &= 0x0fff;
 	if (next >= BAD_FAT12)
 		next = FAT_ENT_EOF;
@@ -151,6 +156,7 @@ static void fat12_ent_put(struct fat_entry *fatent, int new)
 	if (new == FAT_ENT_EOF)
 		new = EOF_FAT12;
 
+	spin_lock(&fat12_entry_lock);
 	if (fatent->entry & 1) {
 		*ent12_p[0] = (new << 4) | (*ent12_p[0] & 0x0f);
 		*ent12_p[1] = new >> 4;
@@ -158,6 +164,7 @@ static void fat12_ent_put(struct fat_entry *fatent, int new)
 		*ent12_p[0] = new & 0xff;
 		*ent12_p[1] = (*ent12_p[1] & 0xf0) | (new >> 8);
 	}
+	spin_unlock(&fat12_entry_lock);
 
 	mark_buffer_dirty(fatent->bhs[0]);
 	if (fatent->nr_bhs == 2)
diff --git a/fs/fat/file.c b/fs/fat/file.c
index 55d3c74..69a83b5 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -134,7 +134,7 @@ const struct file_operations fat_file_operations = {
 	.release	= fat_file_release,
 	.ioctl		= fat_generic_ioctl,
 	.fsync		= file_fsync,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 };
 
 static int fat_cont_expand(struct inode *inode, loff_t size)
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 479722d..0a7ddb3 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -20,6 +20,7 @@
 #include <linux/pagemap.h>
 #include <linux/mpage.h>
 #include <linux/buffer_head.h>
+#include <linux/exportfs.h>
 #include <linux/mount.h>
 #include <linux/vfs.h>
 #include <linux/parser.h>
@@ -354,8 +355,7 @@ static int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de)
 	} else { /* not a directory */
 		inode->i_generation |= 1;
 		inode->i_mode = MSDOS_MKMODE(de->attr,
-		    ((sbi->options.showexec &&
-			!is_exec(de->ext))
+		    ((sbi->options.showexec && !is_exec(de->name + 8))
 			? S_IRUGO|S_IWUGO : S_IRWXUGO)
 		    & ~sbi->options.fs_fmask) | S_IFREG;
 		MSDOS_I(inode)->i_start = le16_to_cpu(de->start);
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 8e382a5..3f22e9f 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -215,7 +215,7 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
 
 	/* O_NOATIME can only be set by the owner or superuser */
 	if ((arg & O_NOATIME) && !(filp->f_flags & O_NOATIME))
-		if (current->fsuid != inode->i_uid && !capable(CAP_FOWNER))
+		if (!is_owner_or_cap(inode))
 			return -EPERM;
 
 	/* required for strict SunOS emulation */
diff --git a/fs/freevxfs/vxfs_dir.h b/fs/freevxfs/vxfs_dir.h
index 8a4dfef..3c96d6e 100644
--- a/fs/freevxfs/vxfs_dir.h
+++ b/fs/freevxfs/vxfs_dir.h
@@ -80,7 +80,7 @@ struct vxfs_direct {
  *	a d_name with size len.
  */
 #define VXFS_DIRPAD		4
-#define VXFS_NAMEMIN		((int)((struct vxfs_direct *)0)->d_name)
+#define VXFS_NAMEMIN		offsetof(struct vxfs_direct, d_name)
 #define VXFS_DIRROUND(len)	((VXFS_DIRPAD + (len) - 1) & ~(VXFS_DIRPAD -1))
 #define VXFS_DIRLEN(len)	(VXFS_DIRROUND(VXFS_NAMEMIN + (len)))
 
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index adf7995..f79de7c 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -802,7 +802,7 @@ static const struct file_operations fuse_file_operations = {
 	.release	= fuse_release,
 	.fsync		= fuse_fsync,
 	.lock		= fuse_file_lock,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 };
 
 static const struct file_operations fuse_direct_io_file_operations = {
@@ -814,7 +814,7 @@ static const struct file_operations fuse_direct_io_file_operations = {
 	.release	= fuse_release,
 	.fsync		= fuse_fsync,
 	.lock		= fuse_file_lock,
-	/* no mmap and sendfile */
+	/* no mmap and splice_read */
 };
 
 static const struct address_space_operations fuse_file_aops  = {
diff --git a/fs/generic_acl.c b/fs/generic_acl.c
index 9ccb789..995d63b 100644
--- a/fs/generic_acl.c
+++ b/fs/generic_acl.c
@@ -78,7 +78,7 @@ generic_acl_set(struct inode *inode, struct generic_acl_operations *ops,
 
 	if (S_ISLNK(inode->i_mode))
 		return -EOPNOTSUPP;
-	if (current->fsuid != inode->i_uid && !capable(CAP_FOWNER))
+	if (!is_owner_or_cap(inode))
 		return -EPERM;
 	if (value) {
 		acl = posix_acl_from_xattr(value, size);
diff --git a/fs/gfs2/Makefile b/fs/gfs2/Makefile
index e3f1ada..04ad0ca 100644
--- a/fs/gfs2/Makefile
+++ b/fs/gfs2/Makefile
@@ -1,7 +1,7 @@
 obj-$(CONFIG_GFS2_FS) += gfs2.o
 gfs2-y := acl.o bmap.o daemon.o dir.o eaops.o eattr.o glock.o \
 	glops.o inode.o lm.o log.o lops.o locking.o main.o meta_io.o \
-	mount.o ondisk.o ops_address.o ops_dentry.o ops_export.o ops_file.o \
+	mount.o ops_address.o ops_dentry.o ops_export.o ops_file.o \
 	ops_fstype.o ops_inode.o ops_super.o ops_vm.o quota.o \
 	recovery.o rgrp.o super.o sys.o trans.o util.o
 
diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
index 6e80844..1047a8c 100644
--- a/fs/gfs2/acl.c
+++ b/fs/gfs2/acl.c
@@ -74,7 +74,7 @@ int gfs2_acl_validate_remove(struct gfs2_inode *ip, int access)
 {
 	if (!GFS2_SB(&ip->i_inode)->sd_args.ar_posix_acl)
 		return -EOPNOTSUPP;
-	if (current->fsuid != ip->i_inode.i_uid && !capable(CAP_FOWNER))
+	if (!is_owner_or_cap(&ip->i_inode))
 		return -EPERM;
 	if (S_ISLNK(ip->i_inode.i_mode))
 		return -EOPNOTSUPP;
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index c53a5d2..cd805a6 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -718,7 +718,7 @@ static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh,
 	for (x = 0; x < rlist.rl_rgrps; x++) {
 		struct gfs2_rgrpd *rgd;
 		rgd = rlist.rl_ghs[x].gh_gl->gl_object;
-		rg_blocks += rgd->rd_ri.ri_length;
+		rg_blocks += rgd->rd_length;
 	}
 
 	error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
@@ -772,7 +772,7 @@ static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh,
 			gfs2_free_data(ip, bstart, blen);
 	}
 
-	ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+	ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
 
 	gfs2_dinode_out(ip, dibh->b_data);
 
@@ -824,7 +824,7 @@ static int do_grow(struct gfs2_inode *ip, u64 size)
 		goto out_gunlock_q;
 
 	error = gfs2_trans_begin(sdp,
-			sdp->sd_max_height + al->al_rgd->rd_ri.ri_length +
+			sdp->sd_max_height + al->al_rgd->rd_length +
 			RES_JDATA + RES_DINODE + RES_STATFS + RES_QUOTA, 0);
 	if (error)
 		goto out_ipres;
@@ -847,7 +847,7 @@ static int do_grow(struct gfs2_inode *ip, u64 size)
 	}
 
 	ip->i_di.di_size = size;
-	ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+	ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
 
 	error = gfs2_meta_inode_buffer(ip, &dibh);
 	if (error)
@@ -885,7 +885,6 @@ static int gfs2_block_truncate_page(struct address_space *mapping)
 	unsigned blocksize, iblock, length, pos;
 	struct buffer_head *bh;
 	struct page *page;
-	void *kaddr;
 	int err;
 
 	page = grab_cache_page(mapping, index);
@@ -928,15 +927,13 @@ static int gfs2_block_truncate_page(struct address_space *mapping)
 		/* Uhhuh. Read error. Complain and punt. */
 		if (!buffer_uptodate(bh))
 			goto unlock;
+		err = 0;
 	}
 
 	if (sdp->sd_args.ar_data == GFS2_DATA_ORDERED || gfs2_is_jdata(ip))
 		gfs2_trans_add_bh(ip->i_gl, bh, 0);
 
-	kaddr = kmap_atomic(page, KM_USER0);
-	memset(kaddr + offset, 0, length);
-	flush_dcache_page(page);
-	kunmap_atomic(kaddr, KM_USER0);
+	zero_user_page(page, offset, length, KM_USER0);
 
 unlock:
 	unlock_page(page);
@@ -962,7 +959,7 @@ static int trunc_start(struct gfs2_inode *ip, u64 size)
 
 	if (gfs2_is_stuffed(ip)) {
 		ip->i_di.di_size = size;
-		ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+		ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
 		gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 		gfs2_dinode_out(ip, dibh->b_data);
 		gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode) + size);
@@ -974,7 +971,7 @@ static int trunc_start(struct gfs2_inode *ip, u64 size)
 
 		if (!error) {
 			ip->i_di.di_size = size;
-			ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+			ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
 			ip->i_di.di_flags |= GFS2_DIF_TRUNC_IN_PROG;
 			gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 			gfs2_dinode_out(ip, dibh->b_data);
@@ -1044,10 +1041,10 @@ static int trunc_end(struct gfs2_inode *ip)
 		ip->i_di.di_height = 0;
 		ip->i_di.di_goal_meta =
 			ip->i_di.di_goal_data =
-			ip->i_num.no_addr;
+			ip->i_no_addr;
 		gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
 	}
-	ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+	ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
 	ip->i_di.di_flags &= ~GFS2_DIF_TRUNC_IN_PROG;
 
 	gfs2_trans_add_bh(ip->i_gl, dibh, 1);
diff --git a/fs/gfs2/daemon.c b/fs/gfs2/daemon.c
index 683cb5b..3548d9f 100644
--- a/fs/gfs2/daemon.c
+++ b/fs/gfs2/daemon.c
@@ -16,6 +16,7 @@
 #include <linux/delay.h>
 #include <linux/gfs2_ondisk.h>
 #include <linux/lm_interface.h>
+#include <linux/freezer.h>
 
 #include "gfs2.h"
 #include "incore.h"
@@ -49,6 +50,8 @@ int gfs2_scand(void *data)
 	while (!kthread_should_stop()) {
 		gfs2_scand_internal(sdp);
 		t = gfs2_tune_get(sdp, gt_scand_secs) * HZ;
+		if (freezing(current))
+			refrigerator();
 		schedule_timeout_interruptible(t);
 	}
 
@@ -74,6 +77,8 @@ int gfs2_glockd(void *data)
 		wait_event_interruptible(sdp->sd_reclaim_wq,
 					 (atomic_read(&sdp->sd_reclaim_count) ||
 					 kthread_should_stop()));
+		if (freezing(current))
+			refrigerator();
 	}
 
 	return 0;
@@ -93,6 +98,8 @@ int gfs2_recoverd(void *data)
 	while (!kthread_should_stop()) {
 		gfs2_check_journals(sdp);
 		t = gfs2_tune_get(sdp,  gt_recoverd_secs) * HZ;
+		if (freezing(current))
+			refrigerator();
 		schedule_timeout_interruptible(t);
 	}
 
@@ -141,6 +148,8 @@ int gfs2_logd(void *data)
 		}
 
 		t = gfs2_tune_get(sdp, gt_logd_secs) * HZ;
+		if (freezing(current))
+			refrigerator();
 		schedule_timeout_interruptible(t);
 	}
 
@@ -191,6 +200,8 @@ int gfs2_quotad(void *data)
 		gfs2_quota_scan(sdp);
 
 		t = gfs2_tune_get(sdp, gt_quotad_secs) * HZ;
+		if (freezing(current))
+			refrigerator();
 		schedule_timeout_interruptible(t);
 	}
 
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index a96fa07..2beb2f4 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -130,7 +130,7 @@ static int gfs2_dir_write_stuffed(struct gfs2_inode *ip, const char *buf,
 	memcpy(dibh->b_data + offset + sizeof(struct gfs2_dinode), buf, size);
 	if (ip->i_di.di_size < offset + size)
 		ip->i_di.di_size = offset + size;
-	ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+	ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
 	gfs2_dinode_out(ip, dibh->b_data);
 
 	brelse(dibh);
@@ -228,7 +228,7 @@ out:
 
 	if (ip->i_di.di_size < offset + copied)
 		ip->i_di.di_size = offset + copied;
-	ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+	ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
 
 	gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 	gfs2_dinode_out(ip, dibh->b_data);
@@ -1456,7 +1456,7 @@ int gfs2_dir_read(struct inode *inode, u64 *offset, void *opaque,
 		if (dip->i_di.di_entries != g.offset) {
 			fs_warn(sdp, "Number of entries corrupt in dir %llu, "
 				"ip->i_di.di_entries (%u) != g.offset (%u)\n",
-				(unsigned long long)dip->i_num.no_addr,
+				(unsigned long long)dip->i_no_addr,
 				dip->i_di.di_entries,
 				g.offset);
 			error = -EIO;
@@ -1488,24 +1488,55 @@ out:
  * Returns: errno
  */
 
-int gfs2_dir_search(struct inode *dir, const struct qstr *name,
-		    struct gfs2_inum_host *inum, unsigned int *type)
+struct inode *gfs2_dir_search(struct inode *dir, const struct qstr *name)
 {
 	struct buffer_head *bh;
 	struct gfs2_dirent *dent;
+	struct inode *inode;
+
+	dent = gfs2_dirent_search(dir, name, gfs2_dirent_find, &bh);
+	if (dent) {
+		if (IS_ERR(dent))
+			return ERR_PTR(PTR_ERR(dent));
+		inode = gfs2_inode_lookup(dir->i_sb, 
+				be16_to_cpu(dent->de_type),
+				be64_to_cpu(dent->de_inum.no_addr),
+				be64_to_cpu(dent->de_inum.no_formal_ino));
+		brelse(bh);
+		return inode;
+	}
+	return ERR_PTR(-ENOENT);
+}
+
+int gfs2_dir_check(struct inode *dir, const struct qstr *name,
+		   const struct gfs2_inode *ip)
+{
+	struct buffer_head *bh;
+	struct gfs2_dirent *dent;
+	int ret = -ENOENT;
 
 	dent = gfs2_dirent_search(dir, name, gfs2_dirent_find, &bh);
 	if (dent) {
 		if (IS_ERR(dent))
 			return PTR_ERR(dent);
-		if (inum)
-			gfs2_inum_in(inum, (char *)&dent->de_inum);
-		if (type)
-			*type = be16_to_cpu(dent->de_type);
+		if (ip) {
+			if (be64_to_cpu(dent->de_inum.no_addr) != ip->i_no_addr)
+				goto out;
+			if (be64_to_cpu(dent->de_inum.no_formal_ino) !=
+			    ip->i_no_formal_ino)
+				goto out;
+			if (unlikely(IF2DT(ip->i_inode.i_mode) !=
+			    be16_to_cpu(dent->de_type))) {
+				gfs2_consist_inode(GFS2_I(dir));
+				ret = -EIO;
+				goto out;
+			}
+		}
+		ret = 0;
+out:
 		brelse(bh);
-		return 0;
 	}
-	return -ENOENT;
+	return ret;
 }
 
 static int dir_new_leaf(struct inode *inode, const struct qstr *name)
@@ -1565,7 +1596,7 @@ static int dir_new_leaf(struct inode *inode, const struct qstr *name)
  */
 
 int gfs2_dir_add(struct inode *inode, const struct qstr *name,
-		 const struct gfs2_inum_host *inum, unsigned type)
+		 const struct gfs2_inode *nip, unsigned type)
 {
 	struct gfs2_inode *ip = GFS2_I(inode);
 	struct buffer_head *bh;
@@ -1580,7 +1611,7 @@ int gfs2_dir_add(struct inode *inode, const struct qstr *name,
 			if (IS_ERR(dent))
 				return PTR_ERR(dent);
 			dent = gfs2_init_dirent(inode, dent, name, bh);
-			gfs2_inum_out(inum, (char *)&dent->de_inum);
+			gfs2_inum_out(nip, dent);
 			dent->de_type = cpu_to_be16(type);
 			if (ip->i_di.di_flags & GFS2_DIF_EXHASH) {
 				leaf = (struct gfs2_leaf *)bh->b_data;
@@ -1592,7 +1623,7 @@ int gfs2_dir_add(struct inode *inode, const struct qstr *name,
 				break;
 			gfs2_trans_add_bh(ip->i_gl, bh, 1);
 			ip->i_di.di_entries++;
-			ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+			ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
 			gfs2_dinode_out(ip, bh->b_data);
 			brelse(bh);
 			error = 0;
@@ -1678,7 +1709,7 @@ int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *name)
 		gfs2_consist_inode(dip);
 	gfs2_trans_add_bh(dip->i_gl, bh, 1);
 	dip->i_di.di_entries--;
-	dip->i_inode.i_mtime = dip->i_inode.i_ctime = CURRENT_TIME_SEC;
+	dip->i_inode.i_mtime = dip->i_inode.i_ctime = CURRENT_TIME;
 	gfs2_dinode_out(dip, bh->b_data);
 	brelse(bh);
 	mark_inode_dirty(&dip->i_inode);
@@ -1700,7 +1731,7 @@ int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *name)
  */
 
 int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
-		   struct gfs2_inum_host *inum, unsigned int new_type)
+		   const struct gfs2_inode *nip, unsigned int new_type)
 {
 	struct buffer_head *bh;
 	struct gfs2_dirent *dent;
@@ -1715,7 +1746,7 @@ int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
 		return PTR_ERR(dent);
 
 	gfs2_trans_add_bh(dip->i_gl, bh, 1);
-	gfs2_inum_out(inum, (char *)&dent->de_inum);
+	gfs2_inum_out(nip, dent);
 	dent->de_type = cpu_to_be16(new_type);
 
 	if (dip->i_di.di_flags & GFS2_DIF_EXHASH) {
@@ -1726,7 +1757,7 @@ int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
 		gfs2_trans_add_bh(dip->i_gl, bh, 1);
 	}
 
-	dip->i_inode.i_mtime = dip->i_inode.i_ctime = CURRENT_TIME_SEC;
+	dip->i_inode.i_mtime = dip->i_inode.i_ctime = CURRENT_TIME;
 	gfs2_dinode_out(dip, bh->b_data);
 	brelse(bh);
 	return 0;
@@ -1867,7 +1898,7 @@ static int leaf_dealloc(struct gfs2_inode *dip, u32 index, u32 len,
 	for (x = 0; x < rlist.rl_rgrps; x++) {
 		struct gfs2_rgrpd *rgd;
 		rgd = rlist.rl_ghs[x].gh_gl->gl_object;
-		rg_blocks += rgd->rd_ri.ri_length;
+		rg_blocks += rgd->rd_length;
 	}
 
 	error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
diff --git a/fs/gfs2/dir.h b/fs/gfs2/dir.h
index 48fe890..8a468ca 100644
--- a/fs/gfs2/dir.h
+++ b/fs/gfs2/dir.h
@@ -16,15 +16,16 @@ struct inode;
 struct gfs2_inode;
 struct gfs2_inum;
 
-int gfs2_dir_search(struct inode *dir, const struct qstr *filename,
-		    struct gfs2_inum_host *inum, unsigned int *type);
+struct inode *gfs2_dir_search(struct inode *dir, const struct qstr *filename);
+int gfs2_dir_check(struct inode *dir, const struct qstr *filename,
+		   const struct gfs2_inode *ip);
 int gfs2_dir_add(struct inode *inode, const struct qstr *filename,
-		 const struct gfs2_inum_host *inum, unsigned int type);
+		 const struct gfs2_inode *ip, unsigned int type);
 int gfs2_dir_del(struct gfs2_inode *dip, const struct qstr *filename);
 int gfs2_dir_read(struct inode *inode, u64 *offset, void *opaque,
 		  filldir_t filldir);
 int gfs2_dir_mvino(struct gfs2_inode *dip, const struct qstr *filename,
-		   struct gfs2_inum_host *new_inum, unsigned int new_type);
+		   const struct gfs2_inode *nip, unsigned int new_type);
 
 int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip);
 
diff --git a/fs/gfs2/eaops.c b/fs/gfs2/eaops.c
index c1f4400..1ab3e9d 100644
--- a/fs/gfs2/eaops.c
+++ b/fs/gfs2/eaops.c
@@ -11,6 +11,7 @@
 #include <linux/spinlock.h>
 #include <linux/completion.h>
 #include <linux/buffer_head.h>
+#include <linux/capability.h>
 #include <linux/xattr.h>
 #include <linux/gfs2_ondisk.h>
 #include <linux/lm_interface.h>
diff --git a/fs/gfs2/eattr.c b/fs/gfs2/eattr.c
index 5b83ca6..2a7435b 100644
--- a/fs/gfs2/eattr.c
+++ b/fs/gfs2/eattr.c
@@ -254,7 +254,7 @@ static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
 	if (error)
 		return error;
 
-	error = gfs2_trans_begin(sdp, rgd->rd_ri.ri_length + RES_DINODE +
+	error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE +
 				 RES_EATTR + RES_STATFS + RES_QUOTA, blks);
 	if (error)
 		goto out_gunlock;
@@ -300,7 +300,7 @@ static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
 
 	error = gfs2_meta_inode_buffer(ip, &dibh);
 	if (!error) {
-		ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+		ip->i_inode.i_ctime = CURRENT_TIME;
 		gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 		gfs2_dinode_out(ip, dibh->b_data);
 		brelse(dibh);
@@ -700,7 +700,7 @@ static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 		goto out_gunlock_q;
 
 	error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
-				 blks + al->al_rgd->rd_ri.ri_length +
+				 blks + al->al_rgd->rd_length +
 				 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
 	if (error)
 		goto out_ipres;
@@ -717,7 +717,7 @@ static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 					    (er->er_mode & S_IFMT));
 			ip->i_inode.i_mode = er->er_mode;
 		}
-		ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+		ip->i_inode.i_ctime = CURRENT_TIME;
 		gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 		gfs2_dinode_out(ip, dibh->b_data);
 		brelse(dibh);
@@ -852,7 +852,7 @@ static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
 			(ip->i_inode.i_mode & S_IFMT) == (er->er_mode & S_IFMT));
 		ip->i_inode.i_mode = er->er_mode;
 	}
-	ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+	ip->i_inode.i_ctime = CURRENT_TIME;
 	gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 	gfs2_dinode_out(ip, dibh->b_data);
 	brelse(dibh);
@@ -1133,7 +1133,7 @@ static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
 
 	error = gfs2_meta_inode_buffer(ip, &dibh);
 	if (!error) {
-		ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+		ip->i_inode.i_ctime = CURRENT_TIME;
 		gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 		gfs2_dinode_out(ip, dibh->b_data);
 		brelse(dibh);
@@ -1352,7 +1352,7 @@ static int ea_dealloc_indirect(struct gfs2_inode *ip)
 	for (x = 0; x < rlist.rl_rgrps; x++) {
 		struct gfs2_rgrpd *rgd;
 		rgd = rlist.rl_ghs[x].gh_gl->gl_object;
-		rg_blocks += rgd->rd_ri.ri_length;
+		rg_blocks += rgd->rd_length;
 	}
 
 	error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 1815429..3f0974e 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -422,11 +422,11 @@ void gfs2_holder_uninit(struct gfs2_holder *gh)
 static void gfs2_holder_wake(struct gfs2_holder *gh)
 {
 	clear_bit(HIF_WAIT, &gh->gh_iflags);
-	smp_mb();
+	smp_mb__after_clear_bit();
 	wake_up_bit(&gh->gh_iflags, HIF_WAIT);
 }
 
-static int holder_wait(void *word)
+static int just_schedule(void *word)
 {
         schedule();
         return 0;
@@ -435,7 +435,20 @@ static int holder_wait(void *word)
 static void wait_on_holder(struct gfs2_holder *gh)
 {
 	might_sleep();
-	wait_on_bit(&gh->gh_iflags, HIF_WAIT, holder_wait, TASK_UNINTERRUPTIBLE);
+	wait_on_bit(&gh->gh_iflags, HIF_WAIT, just_schedule, TASK_UNINTERRUPTIBLE);
+}
+
+static void gfs2_demote_wake(struct gfs2_glock *gl)
+{
+        clear_bit(GLF_DEMOTE, &gl->gl_flags);
+        smp_mb__after_clear_bit();
+        wake_up_bit(&gl->gl_flags, GLF_DEMOTE);
+}
+
+static void wait_on_demote(struct gfs2_glock *gl)
+{
+	might_sleep();
+	wait_on_bit(&gl->gl_flags, GLF_DEMOTE, just_schedule, TASK_UNINTERRUPTIBLE);
 }
 
 /**
@@ -528,7 +541,7 @@ static int rq_demote(struct gfs2_glock *gl)
 
 	if (gl->gl_state == gl->gl_demote_state ||
 	    gl->gl_state == LM_ST_UNLOCKED) {
-		clear_bit(GLF_DEMOTE, &gl->gl_flags);
+		gfs2_demote_wake(gl);
 		return 0;
 	}
 	set_bit(GLF_LOCK, &gl->gl_flags);
@@ -666,12 +679,22 @@ static void gfs2_glmutex_unlock(struct gfs2_glock *gl)
  * practise: LM_ST_SHARED and LM_ST_UNLOCKED
  */
 
-static void handle_callback(struct gfs2_glock *gl, unsigned int state)
+static void handle_callback(struct gfs2_glock *gl, unsigned int state, int remote)
 {
 	spin_lock(&gl->gl_spin);
 	if (test_and_set_bit(GLF_DEMOTE, &gl->gl_flags) == 0) {
 		gl->gl_demote_state = state;
 		gl->gl_demote_time = jiffies;
+		if (remote && gl->gl_ops->go_type == LM_TYPE_IOPEN &&
+		    gl->gl_object) {
+			struct inode *inode = igrab(gl->gl_object);
+			spin_unlock(&gl->gl_spin);
+			if (inode) {
+				d_prune_aliases(inode);
+				iput(inode);
+			}
+			return;
+		}
 	} else if (gl->gl_demote_state != LM_ST_UNLOCKED) {
 		gl->gl_demote_state = state;
 	}
@@ -740,7 +763,7 @@ static void xmote_bh(struct gfs2_glock *gl, unsigned int ret)
 		if (ret & LM_OUT_CANCELED)
 			op_done = 0;
 		else
-			clear_bit(GLF_DEMOTE, &gl->gl_flags);
+			gfs2_demote_wake(gl);
 	} else {
 		spin_lock(&gl->gl_spin);
 		list_del_init(&gh->gh_list);
@@ -848,7 +871,7 @@ static void drop_bh(struct gfs2_glock *gl, unsigned int ret)
 	gfs2_assert_warn(sdp, !ret);
 
 	state_change(gl, LM_ST_UNLOCKED);
-	clear_bit(GLF_DEMOTE, &gl->gl_flags);
+	gfs2_demote_wake(gl);
 
 	if (glops->go_inval)
 		glops->go_inval(gl, DIO_METADATA);
@@ -1174,7 +1197,7 @@ void gfs2_glock_dq(struct gfs2_holder *gh)
 	const struct gfs2_glock_operations *glops = gl->gl_ops;
 
 	if (gh->gh_flags & GL_NOCACHE)
-		handle_callback(gl, LM_ST_UNLOCKED);
+		handle_callback(gl, LM_ST_UNLOCKED, 0);
 
 	gfs2_glmutex_lock(gl);
 
@@ -1196,6 +1219,13 @@ void gfs2_glock_dq(struct gfs2_holder *gh)
 	spin_unlock(&gl->gl_spin);
 }
 
+void gfs2_glock_dq_wait(struct gfs2_holder *gh)
+{
+	struct gfs2_glock *gl = gh->gh_gl;
+	gfs2_glock_dq(gh);
+	wait_on_demote(gl);
+}
+
 /**
  * gfs2_glock_dq_uninit - dequeue a holder from a glock and initialize it
  * @gh: the holder structure
@@ -1297,10 +1327,6 @@ static int nq_m_sync(unsigned int num_gh, struct gfs2_holder *ghs,
  * @num_gh: the number of structures
  * @ghs: an array of struct gfs2_holder structures
  *
- * Figure out how big an impact this function has.  Either:
- * 1) Replace this code with code that calls gfs2_glock_prefetch()
- * 2) Forget async stuff and just call nq_m_sync()
- * 3) Leave it like it is
  *
  * Returns: 0 on success (all glocks acquired),
  *          errno on failure (no glocks acquired)
@@ -1308,62 +1334,28 @@ static int nq_m_sync(unsigned int num_gh, struct gfs2_holder *ghs,
 
 int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs)
 {
-	int *e;
-	unsigned int x;
-	int borked = 0, serious = 0;
+	struct gfs2_holder *tmp[4];
+	struct gfs2_holder **pph = tmp;
 	int error = 0;
 
-	if (!num_gh)
+	switch(num_gh) {
+	case 0:
 		return 0;
-
-	if (num_gh == 1) {
+	case 1:
 		ghs->gh_flags &= ~(LM_FLAG_TRY | GL_ASYNC);
 		return gfs2_glock_nq(ghs);
-	}
-
-	e = kcalloc(num_gh, sizeof(struct gfs2_holder *), GFP_KERNEL);
-	if (!e)
-		return -ENOMEM;
-
-	for (x = 0; x < num_gh; x++) {
-		ghs[x].gh_flags |= LM_FLAG_TRY | GL_ASYNC;
-		error = gfs2_glock_nq(&ghs[x]);
-		if (error) {
-			borked = 1;
-			serious = error;
-			num_gh = x;
+	default:
+		if (num_gh <= 4)
 			break;
-		}
-	}
-
-	for (x = 0; x < num_gh; x++) {
-		error = e[x] = glock_wait_internal(&ghs[x]);
-		if (error) {
-			borked = 1;
-			if (error != GLR_TRYFAILED && error != GLR_CANCELED)
-				serious = error;
-		}
+		pph = kmalloc(num_gh * sizeof(struct gfs2_holder *), GFP_NOFS);
+		if (!pph)
+			return -ENOMEM;
 	}
 
-	if (!borked) {
-		kfree(e);
-		return 0;
-	}
-
-	for (x = 0; x < num_gh; x++)
-		if (!e[x])
-			gfs2_glock_dq(&ghs[x]);
-
-	if (serious)
-		error = serious;
-	else {
-		for (x = 0; x < num_gh; x++)
-			gfs2_holder_reinit(ghs[x].gh_state, ghs[x].gh_flags,
-					  &ghs[x]);
-		error = nq_m_sync(num_gh, ghs, (struct gfs2_holder **)e);
-	}
+	error = nq_m_sync(num_gh, ghs, pph);
 
-	kfree(e);
+	if (pph != tmp)
+		kfree(pph);
 
 	return error;
 }
@@ -1456,7 +1448,7 @@ static void blocking_cb(struct gfs2_sbd *sdp, struct lm_lockname *name,
 	if (!gl)
 		return;
 
-	handle_callback(gl, state);
+	handle_callback(gl, state, 1);
 
 	spin_lock(&gl->gl_spin);
 	run_queue(gl);
@@ -1596,7 +1588,7 @@ void gfs2_reclaim_glock(struct gfs2_sbd *sdp)
 	if (gfs2_glmutex_trylock(gl)) {
 		if (list_empty(&gl->gl_holders) &&
 		    gl->gl_state != LM_ST_UNLOCKED && demote_ok(gl))
-			handle_callback(gl, LM_ST_UNLOCKED);
+			handle_callback(gl, LM_ST_UNLOCKED, 0);
 		gfs2_glmutex_unlock(gl);
 	}
 
@@ -1709,7 +1701,7 @@ static void clear_glock(struct gfs2_glock *gl)
 	if (gfs2_glmutex_trylock(gl)) {
 		if (list_empty(&gl->gl_holders) &&
 		    gl->gl_state != LM_ST_UNLOCKED)
-			handle_callback(gl, LM_ST_UNLOCKED);
+			handle_callback(gl, LM_ST_UNLOCKED, 0);
 		gfs2_glmutex_unlock(gl);
 	}
 }
@@ -1823,7 +1815,8 @@ static int dump_inode(struct glock_iter *gi, struct gfs2_inode *ip)
 
 	print_dbg(gi, "  Inode:\n");
 	print_dbg(gi, "    num = %llu/%llu\n",
-		    ip->i_num.no_formal_ino, ip->i_num.no_addr);
+		  (unsigned long long)ip->i_no_formal_ino,
+		  (unsigned long long)ip->i_no_addr);
 	print_dbg(gi, "    type = %u\n", IF2DT(ip->i_inode.i_mode));
 	print_dbg(gi, "    i_flags =");
 	for (x = 0; x < 32; x++)
@@ -1909,8 +1902,8 @@ static int dump_glock(struct glock_iter *gi, struct gfs2_glock *gl)
 	}
 	if (test_bit(GLF_DEMOTE, &gl->gl_flags)) {
 		print_dbg(gi, "  Demotion req to state %u (%llu uS ago)\n",
-			  gl->gl_demote_state,
-			  (u64)(jiffies - gl->gl_demote_time)*(1000000/HZ));
+			  gl->gl_demote_state, (unsigned long long)
+			  (jiffies - gl->gl_demote_time)*(1000000/HZ));
 	}
 	if (gl->gl_ops == &gfs2_inode_glops && gl->gl_object) {
 		if (!test_bit(GLF_LOCK, &gl->gl_flags) &&
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index b3e152d..7721ca3 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -87,6 +87,7 @@ int gfs2_glock_nq(struct gfs2_holder *gh);
 int gfs2_glock_poll(struct gfs2_holder *gh);
 int gfs2_glock_wait(struct gfs2_holder *gh);
 void gfs2_glock_dq(struct gfs2_holder *gh);
+void gfs2_glock_dq_wait(struct gfs2_holder *gh);
 
 void gfs2_glock_dq_uninit(struct gfs2_holder *gh);
 int gfs2_glock_nq_num(struct gfs2_sbd *sdp,
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index 7b82657..777ca46 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -156,9 +156,9 @@ static void inode_go_sync(struct gfs2_glock *gl)
 		ip = NULL;
 
 	if (test_bit(GLF_DIRTY, &gl->gl_flags)) {
-		gfs2_log_flush(gl->gl_sbd, gl);
 		if (ip)
 			filemap_fdatawrite(ip->i_inode.i_mapping);
+		gfs2_log_flush(gl->gl_sbd, gl);
 		gfs2_meta_sync(gl);
 		if (ip) {
 			struct address_space *mapping = ip->i_inode.i_mapping;
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index d995441..170ba93 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -28,6 +28,14 @@ struct gfs2_sbd;
 
 typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
 
+struct gfs2_log_header_host {
+	u64 lh_sequence;	/* Sequence number of this transaction */
+	u32 lh_flags;		/* GFS2_LOG_HEAD_... */
+	u32 lh_tail;		/* Block number of log tail */
+	u32 lh_blkno;
+	u32 lh_hash;
+};
+
 /*
  * Structure of operations that are associated with each
  * type of element in the log.
@@ -60,12 +68,23 @@ struct gfs2_bitmap {
 	u32 bi_len;
 };
 
+struct gfs2_rgrp_host {
+	u32 rg_flags;
+	u32 rg_free;
+	u32 rg_dinodes;
+	u64 rg_igeneration;
+};
+
 struct gfs2_rgrpd {
 	struct list_head rd_list;	/* Link with superblock */
 	struct list_head rd_list_mru;
 	struct list_head rd_recent;	/* Recently used rgrps */
 	struct gfs2_glock *rd_gl;	/* Glock for this rgrp */
-	struct gfs2_rindex_host rd_ri;
+	u64 rd_addr;			/* grp block disk address */
+	u64 rd_data0;			/* first data location */
+	u32 rd_length;			/* length of rgrp header in fs blocks */
+	u32 rd_data;			/* num of data blocks in rgrp */
+	u32 rd_bitbytes;		/* number of bytes in data bitmaps */
 	struct gfs2_rgrp_host rd_rg;
 	u64 rd_rg_vn;
 	struct gfs2_bitmap *rd_bits;
@@ -76,6 +95,8 @@ struct gfs2_rgrpd {
 	u32 rd_last_alloc_data;
 	u32 rd_last_alloc_meta;
 	struct gfs2_sbd *rd_sbd;
+	unsigned long rd_flags;
+#define GFS2_RDF_CHECK        0x0001          /* Need to check for unlinked inodes */
 };
 
 enum gfs2_state_bits {
@@ -211,10 +232,24 @@ enum {
 	GIF_SW_PAGED		= 3,
 };
 
+struct gfs2_dinode_host {
+	u64 di_size;		/* number of bytes in file */
+	u64 di_blocks;		/* number of blocks in file */
+	u64 di_goal_meta;	/* rgrp to alloc from next */
+	u64 di_goal_data;	/* data block goal */
+	u64 di_generation;	/* generation number for NFS */
+	u32 di_flags;		/* GFS2_DIF_... */
+	u16 di_height;		/* height of metadata */
+	/* These only apply to directories  */
+	u16 di_depth;		/* Number of bits in the table */
+	u32 di_entries;		/* The number of entries in the directory */
+	u64 di_eattr;		/* extended attribute block number */
+};
+
 struct gfs2_inode {
 	struct inode i_inode;
-	struct gfs2_inum_host i_num;
-
+	u64 i_no_addr;
+	u64 i_no_formal_ino;
 	unsigned long i_flags;		/* GIF_... */
 
 	struct gfs2_dinode_host i_di; /* To be replaced by ref to block */
@@ -275,14 +310,6 @@ enum {
 	QDF_LOCKED		= 2,
 };
 
-struct gfs2_quota_lvb {
-        __be32 qb_magic;
-        u32 __pad;
-        __be64 qb_limit;      /* Hard limit of # blocks to alloc */
-        __be64 qb_warn;       /* Warn user when alloc is above this # */
-        __be64 qb_value;       /* Current # blocks allocated */
-};
-
 struct gfs2_quota_data {
 	struct list_head qd_list;
 	unsigned int qd_count;
@@ -327,7 +354,9 @@ struct gfs2_trans {
 
 	unsigned int tr_num_buf;
 	unsigned int tr_num_buf_new;
+	unsigned int tr_num_databuf_new;
 	unsigned int tr_num_buf_rm;
+	unsigned int tr_num_databuf_rm;
 	struct list_head tr_list_buf;
 
 	unsigned int tr_num_revoke;
@@ -354,6 +383,12 @@ struct gfs2_jdesc {
 	unsigned int jd_blocks;
 };
 
+struct gfs2_statfs_change_host {
+	s64 sc_total;
+	s64 sc_free;
+	s64 sc_dinodes;
+};
+
 #define GFS2_GLOCKD_DEFAULT	1
 #define GFS2_GLOCKD_MAX		16
 
@@ -426,6 +461,28 @@ enum {
 
 #define GFS2_FSNAME_LEN		256
 
+struct gfs2_inum_host {
+	u64 no_formal_ino;
+	u64 no_addr;
+};
+
+struct gfs2_sb_host {
+	u32 sb_magic;
+	u32 sb_type;
+	u32 sb_format;
+
+	u32 sb_fs_format;
+	u32 sb_multihost_format;
+	u32 sb_bsize;
+	u32 sb_bsize_shift;
+
+	struct gfs2_inum_host sb_master_dir;
+	struct gfs2_inum_host sb_root_dir;
+
+	char sb_lockproto[GFS2_LOCKNAME_LEN];
+	char sb_locktable[GFS2_LOCKNAME_LEN];
+};
+
 struct gfs2_sbd {
 	struct super_block *sd_vfs;
 	struct super_block *sd_vfs_meta;
@@ -544,6 +601,7 @@ struct gfs2_sbd {
 
 	unsigned int sd_log_blks_reserved;
 	unsigned int sd_log_commited_buf;
+	unsigned int sd_log_commited_databuf;
 	unsigned int sd_log_commited_revoke;
 
 	unsigned int sd_log_num_gl;
@@ -552,7 +610,6 @@ struct gfs2_sbd {
 	unsigned int sd_log_num_rg;
 	unsigned int sd_log_num_databuf;
 	unsigned int sd_log_num_jdata;
-	unsigned int sd_log_num_hdrs;
 
 	struct list_head sd_log_le_gl;
 	struct list_head sd_log_le_buf;
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index df0b8b3..34f7bcd 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -38,12 +38,17 @@
 #include "trans.h"
 #include "util.h"
 
+struct gfs2_inum_range_host {
+	u64 ir_start;
+	u64 ir_length;
+};
+
 static int iget_test(struct inode *inode, void *opaque)
 {
 	struct gfs2_inode *ip = GFS2_I(inode);
-	struct gfs2_inum_host *inum = opaque;
+	u64 *no_addr = opaque;
 
-	if (ip->i_num.no_addr == inum->no_addr &&
+	if (ip->i_no_addr == *no_addr &&
 	    inode->i_private != NULL)
 		return 1;
 
@@ -53,37 +58,70 @@ static int iget_test(struct inode *inode, void *opaque)
 static int iget_set(struct inode *inode, void *opaque)
 {
 	struct gfs2_inode *ip = GFS2_I(inode);
-	struct gfs2_inum_host *inum = opaque;
+	u64 *no_addr = opaque;
 
-	ip->i_num = *inum;
-	inode->i_ino = inum->no_addr;
+	inode->i_ino = (unsigned long)*no_addr;
+	ip->i_no_addr = *no_addr;
 	return 0;
 }
 
-struct inode *gfs2_ilookup(struct super_block *sb, struct gfs2_inum_host *inum)
+struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr)
+{
+	unsigned long hash = (unsigned long)no_addr;
+	return ilookup5(sb, hash, iget_test, &no_addr);
+}
+
+static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
 {
-	return ilookup5(sb, (unsigned long)inum->no_addr,
-			iget_test, inum);
+	unsigned long hash = (unsigned long)no_addr;
+	return iget5_locked(sb, hash, iget_test, iget_set, &no_addr);
 }
 
-static struct inode *gfs2_iget(struct super_block *sb, struct gfs2_inum_host *inum)
+/**
+ * GFS2 lookup code fills in vfs inode contents based on info obtained
+ * from directory entry inside gfs2_inode_lookup(). This has caused issues
+ * with NFS code path since its get_dentry routine doesn't have the relevant
+ * directory entry when gfs2_inode_lookup() is invoked. Part of the code
+ * segment inside gfs2_inode_lookup code needs to get moved around.
+ *
+ * Clean up I_LOCK and I_NEW as well.
+ **/
+
+void gfs2_set_iop(struct inode *inode)
 {
-	return iget5_locked(sb, (unsigned long)inum->no_addr,
-		     iget_test, iget_set, inum);
+	umode_t mode = inode->i_mode;
+
+	if (S_ISREG(mode)) {
+		inode->i_op = &gfs2_file_iops;
+		inode->i_fop = &gfs2_file_fops;
+		inode->i_mapping->a_ops = &gfs2_file_aops;
+	} else if (S_ISDIR(mode)) {
+		inode->i_op = &gfs2_dir_iops;
+		inode->i_fop = &gfs2_dir_fops;
+	} else if (S_ISLNK(mode)) {
+		inode->i_op = &gfs2_symlink_iops;
+	} else {
+		inode->i_op = &gfs2_dev_iops;
+	}
+
+	unlock_new_inode(inode);
 }
 
 /**
  * gfs2_inode_lookup - Lookup an inode
  * @sb: The super block
- * @inum: The inode number
+ * @no_addr: The inode number
  * @type: The type of the inode
  *
  * Returns: A VFS inode, or an error
  */
 
-struct inode *gfs2_inode_lookup(struct super_block *sb, struct gfs2_inum_host *inum, unsigned int type)
+struct inode *gfs2_inode_lookup(struct super_block *sb, 
+				unsigned int type,
+				u64 no_addr,
+				u64 no_formal_ino)
 {
-	struct inode *inode = gfs2_iget(sb, inum);
+	struct inode *inode = gfs2_iget(sb, no_addr);
 	struct gfs2_inode *ip = GFS2_I(inode);
 	struct gfs2_glock *io_gl;
 	int error;
@@ -93,29 +131,15 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, struct gfs2_inum_host *i
 
 	if (inode->i_state & I_NEW) {
 		struct gfs2_sbd *sdp = GFS2_SB(inode);
-		umode_t mode = DT2IF(type);
 		inode->i_private = ip;
-		inode->i_mode = mode;
-
-		if (S_ISREG(mode)) {
-			inode->i_op = &gfs2_file_iops;
-			inode->i_fop = &gfs2_file_fops;
-			inode->i_mapping->a_ops = &gfs2_file_aops;
-		} else if (S_ISDIR(mode)) {
-			inode->i_op = &gfs2_dir_iops;
-			inode->i_fop = &gfs2_dir_fops;
-		} else if (S_ISLNK(mode)) {
-			inode->i_op = &gfs2_symlink_iops;
-		} else {
-			inode->i_op = &gfs2_dev_iops;
-		}
+		ip->i_no_formal_ino = no_formal_ino;
 
-		error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
+		error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
 		if (unlikely(error))
 			goto fail;
 		ip->i_gl->gl_object = ip;
 
-		error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
+		error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
 		if (unlikely(error))
 			goto fail_put;
 
@@ -123,12 +147,38 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, struct gfs2_inum_host *i
 		error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
 		if (unlikely(error))
 			goto fail_iopen;
+		ip->i_iopen_gh.gh_gl->gl_object = ip;
 
 		gfs2_glock_put(io_gl);
-		unlock_new_inode(inode);
+
+		if ((type == DT_UNKNOWN) && (no_formal_ino == 0))
+			goto gfs2_nfsbypass;
+
+		inode->i_mode = DT2IF(type);
+
+		/*
+		 * We must read the inode in order to work out its type in
+		 * this case. Note that this doesn't happen often as we normally
+		 * know the type beforehand. This code path only occurs during
+		 * unlinked inode recovery (where it is safe to do this glock,
+		 * which is not true in the general case).
+		 */
+		if (type == DT_UNKNOWN) {
+			struct gfs2_holder gh;
+			error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+			if (unlikely(error))
+				goto fail_glock;
+			/* Inode is now uptodate */
+			gfs2_glock_dq_uninit(&gh);
+		}
+
+		gfs2_set_iop(inode);
 	}
 
+gfs2_nfsbypass:
 	return inode;
+fail_glock:
+	gfs2_glock_dq(&ip->i_iopen_gh);
 fail_iopen:
 	gfs2_glock_put(io_gl);
 fail_put:
@@ -144,14 +194,12 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
 	struct gfs2_dinode_host *di = &ip->i_di;
 	const struct gfs2_dinode *str = buf;
 
-	if (ip->i_num.no_addr != be64_to_cpu(str->di_num.no_addr)) {
+	if (ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)) {
 		if (gfs2_consist_inode(ip))
 			gfs2_dinode_print(ip);
 		return -EIO;
 	}
-	if (ip->i_num.no_formal_ino != be64_to_cpu(str->di_num.no_formal_ino))
-		return -ESTALE;
-
+	ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
 	ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
 	ip->i_inode.i_rdev = 0;
 	switch (ip->i_inode.i_mode & S_IFMT) {
@@ -175,11 +223,11 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
 	di->di_blocks = be64_to_cpu(str->di_blocks);
 	gfs2_set_inode_blocks(&ip->i_inode);
 	ip->i_inode.i_atime.tv_sec = be64_to_cpu(str->di_atime);
-	ip->i_inode.i_atime.tv_nsec = 0;
+	ip->i_inode.i_atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
 	ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
-	ip->i_inode.i_mtime.tv_nsec = 0;
+	ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
 	ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
-	ip->i_inode.i_ctime.tv_nsec = 0;
+	ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
 
 	di->di_goal_meta = be64_to_cpu(str->di_goal_meta);
 	di->di_goal_data = be64_to_cpu(str->di_goal_data);
@@ -247,7 +295,7 @@ int gfs2_dinode_dealloc(struct gfs2_inode *ip)
 	if (error)
 		goto out_qs;
 
-	rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr);
+	rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
 	if (!rgd) {
 		gfs2_consist_inode(ip);
 		error = -EIO;
@@ -314,7 +362,7 @@ int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
 	else
 		drop_nlink(&ip->i_inode);
 
-	ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+	ip->i_inode.i_ctime = CURRENT_TIME;
 
 	gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 	gfs2_dinode_out(ip, dibh->b_data);
@@ -366,9 +414,7 @@ struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
 	struct super_block *sb = dir->i_sb;
 	struct gfs2_inode *dip = GFS2_I(dir);
 	struct gfs2_holder d_gh;
-	struct gfs2_inum_host inum;
-	unsigned int type;
-	int error;
+	int error = 0;
 	struct inode *inode = NULL;
 	int unlock = 0;
 
@@ -395,12 +441,9 @@ struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
 			goto out;
 	}
 
-	error = gfs2_dir_search(dir, name, &inum, &type);
-	if (error)
-		goto out;
-
-	inode = gfs2_inode_lookup(sb, &inum, type);
-
+	inode = gfs2_dir_search(dir, name);
+	if (IS_ERR(inode))
+		error = PTR_ERR(inode);
 out:
 	if (unlock)
 		gfs2_glock_dq_uninit(&d_gh);
@@ -409,6 +452,22 @@ out:
 	return inode ? inode : ERR_PTR(error);
 }
 
+static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf)
+{
+	const struct gfs2_inum_range *str = buf;
+
+	ir->ir_start = be64_to_cpu(str->ir_start);
+	ir->ir_length = be64_to_cpu(str->ir_length);
+}
+
+static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf)
+{
+	struct gfs2_inum_range *str = buf;
+
+	str->ir_start = cpu_to_be64(ir->ir_start);
+	str->ir_length = cpu_to_be64(ir->ir_length);
+}
+
 static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino)
 {
 	struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
@@ -548,7 +607,7 @@ static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
 	if (!dip->i_inode.i_nlink)
 		return -EPERM;
 
-	error = gfs2_dir_search(&dip->i_inode, name, NULL, NULL);
+	error = gfs2_dir_check(&dip->i_inode, name, NULL);
 	switch (error) {
 	case -ENOENT:
 		error = 0;
@@ -588,8 +647,7 @@ static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode,
 		*gid = current->fsgid;
 }
 
-static int alloc_dinode(struct gfs2_inode *dip, struct gfs2_inum_host *inum,
-			u64 *generation)
+static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation)
 {
 	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
 	int error;
@@ -605,7 +663,7 @@ static int alloc_dinode(struct gfs2_inode *dip, struct gfs2_inum_host *inum,
 	if (error)
 		goto out_ipreserv;
 
-	inum->no_addr = gfs2_alloc_di(dip, generation);
+	*no_addr = gfs2_alloc_di(dip, generation);
 
 	gfs2_trans_end(sdp);
 
@@ -635,6 +693,7 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
 	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
 	struct gfs2_dinode *di;
 	struct buffer_head *dibh;
+	struct timespec tv = CURRENT_TIME;
 
 	dibh = gfs2_meta_new(gl, inum->no_addr);
 	gfs2_trans_add_bh(gl, dibh, 1);
@@ -650,7 +709,7 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
 	di->di_nlink = 0;
 	di->di_size = 0;
 	di->di_blocks = cpu_to_be64(1);
-	di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(get_seconds());
+	di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec);
 	di->di_major = cpu_to_be32(MAJOR(dev));
 	di->di_minor = cpu_to_be32(MINOR(dev));
 	di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr);
@@ -680,6 +739,9 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
 	di->di_entries = 0;
 	memset(&di->__pad4, 0, sizeof(di->__pad4));
 	di->di_eattr = 0;
+	di->di_atime_nsec = cpu_to_be32(tv.tv_nsec);
+	di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec);
+	di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec);
 	memset(&di->di_reserved, 0, sizeof(di->di_reserved));
 
 	brelse(dibh);
@@ -749,7 +811,7 @@ static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
 			goto fail_quota_locks;
 
 		error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
-					 al->al_rgd->rd_ri.ri_length +
+					 al->al_rgd->rd_length +
 					 2 * RES_DINODE +
 					 RES_STATFS + RES_QUOTA, 0);
 		if (error)
@@ -760,7 +822,7 @@ static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
 			goto fail_quota_locks;
 	}
 
-	error = gfs2_dir_add(&dip->i_inode, name, &ip->i_num, IF2DT(ip->i_inode.i_mode));
+	error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode));
 	if (error)
 		goto fail_end_trans;
 
@@ -840,11 +902,11 @@ static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip)
 struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
 			   unsigned int mode, dev_t dev)
 {
-	struct inode *inode;
+	struct inode *inode = NULL;
 	struct gfs2_inode *dip = ghs->gh_gl->gl_object;
 	struct inode *dir = &dip->i_inode;
 	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
-	struct gfs2_inum_host inum;
+	struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
 	int error;
 	u64 generation;
 
@@ -864,7 +926,7 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
 	if (error)
 		goto fail_gunlock;
 
-	error = alloc_dinode(dip, &inum, &generation);
+	error = alloc_dinode(dip, &inum.no_addr, &generation);
 	if (error)
 		goto fail_gunlock;
 
@@ -877,34 +939,36 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
 	if (error)
 		goto fail_gunlock2;
 
-	inode = gfs2_inode_lookup(dir->i_sb, &inum, IF2DT(mode));
+	inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode),
+					inum.no_addr,
+					inum.no_formal_ino);
 	if (IS_ERR(inode))
 		goto fail_gunlock2;
 
 	error = gfs2_inode_refresh(GFS2_I(inode));
 	if (error)
-		goto fail_iput;
+		goto fail_gunlock2;
 
 	error = gfs2_acl_create(dip, GFS2_I(inode));
 	if (error)
-		goto fail_iput;
+		goto fail_gunlock2;
 
 	error = gfs2_security_init(dip, GFS2_I(inode));
 	if (error)
-		goto fail_iput;
+		goto fail_gunlock2;
 
 	error = link_dinode(dip, name, GFS2_I(inode));
 	if (error)
-		goto fail_iput;
+		goto fail_gunlock2;
 
 	if (!inode)
 		return ERR_PTR(-ENOMEM);
 	return inode;
 
-fail_iput:
-	iput(inode);
 fail_gunlock2:
 	gfs2_glock_dq_uninit(ghs + 1);
+	if (inode)
+		iput(inode);
 fail_gunlock:
 	gfs2_glock_dq(ghs);
 fail:
@@ -976,10 +1040,8 @@ int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
  */
 
 int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
-		   struct gfs2_inode *ip)
+		   const struct gfs2_inode *ip)
 {
-	struct gfs2_inum_host inum;
-	unsigned int type;
 	int error;
 
 	if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
@@ -997,18 +1059,10 @@ int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
 	if (error)
 		return error;
 
-	error = gfs2_dir_search(&dip->i_inode, name, &inum, &type);
+	error = gfs2_dir_check(&dip->i_inode, name, ip);
 	if (error)
 		return error;
 
-	if (!gfs2_inum_equal(&inum, &ip->i_num))
-		return -ENOENT;
-
-	if (IF2DT(ip->i_inode.i_mode) != type) {
-		gfs2_consist_inode(dip);
-		return -EIO;
-	}
-
 	return 0;
 }
 
@@ -1132,10 +1186,11 @@ int gfs2_glock_nq_atime(struct gfs2_holder *gh)
 	struct gfs2_glock *gl = gh->gh_gl;
 	struct gfs2_sbd *sdp = gl->gl_sbd;
 	struct gfs2_inode *ip = gl->gl_object;
-	s64 curtime, quantum = gfs2_tune_get(sdp, gt_atime_quantum);
+	s64 quantum = gfs2_tune_get(sdp, gt_atime_quantum);
 	unsigned int state;
 	int flags;
 	int error;
+	struct timespec tv = CURRENT_TIME;
 
 	if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) ||
 	    gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) ||
@@ -1153,8 +1208,7 @@ int gfs2_glock_nq_atime(struct gfs2_holder *gh)
 	    (sdp->sd_vfs->s_flags & MS_RDONLY))
 		return 0;
 
-	curtime = get_seconds();
-	if (curtime - ip->i_inode.i_atime.tv_sec >= quantum) {
+	if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) {
 		gfs2_glock_dq(gh);
 		gfs2_holder_reinit(LM_ST_EXCLUSIVE, gh->gh_flags & ~LM_FLAG_ANY,
 				   gh);
@@ -1165,8 +1219,8 @@ int gfs2_glock_nq_atime(struct gfs2_holder *gh)
 		/* Verify that atime hasn't been updated while we were
 		   trying to get exclusive lock. */
 
-		curtime = get_seconds();
-		if (curtime - ip->i_inode.i_atime.tv_sec >= quantum) {
+		tv = CURRENT_TIME;
+		if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) {
 			struct buffer_head *dibh;
 			struct gfs2_dinode *di;
 
@@ -1180,11 +1234,12 @@ int gfs2_glock_nq_atime(struct gfs2_holder *gh)
 			if (error)
 				goto fail_end_trans;
 
-			ip->i_inode.i_atime.tv_sec = curtime;
+			ip->i_inode.i_atime = tv;
 
 			gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 			di = (struct gfs2_dinode *)dibh->b_data;
 			di->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
+			di->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
 			brelse(dibh);
 
 			gfs2_trans_end(sdp);
@@ -1252,3 +1307,66 @@ int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
 	return error;
 }
 
+void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
+{
+	const struct gfs2_dinode_host *di = &ip->i_di;
+	struct gfs2_dinode *str = buf;
+
+	str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
+	str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
+	str->di_header.__pad0 = 0;
+	str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
+	str->di_header.__pad1 = 0;
+	str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
+	str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
+	str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
+	str->di_uid = cpu_to_be32(ip->i_inode.i_uid);
+	str->di_gid = cpu_to_be32(ip->i_inode.i_gid);
+	str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
+	str->di_size = cpu_to_be64(di->di_size);
+	str->di_blocks = cpu_to_be64(di->di_blocks);
+	str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
+	str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
+	str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec);
+
+	str->di_goal_meta = cpu_to_be64(di->di_goal_meta);
+	str->di_goal_data = cpu_to_be64(di->di_goal_data);
+	str->di_generation = cpu_to_be64(di->di_generation);
+
+	str->di_flags = cpu_to_be32(di->di_flags);
+	str->di_height = cpu_to_be16(di->di_height);
+	str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
+					     !(ip->i_di.di_flags & GFS2_DIF_EXHASH) ?
+					     GFS2_FORMAT_DE : 0);
+	str->di_depth = cpu_to_be16(di->di_depth);
+	str->di_entries = cpu_to_be32(di->di_entries);
+
+	str->di_eattr = cpu_to_be64(di->di_eattr);
+	str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
+	str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec);
+	str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec);
+}
+
+void gfs2_dinode_print(const struct gfs2_inode *ip)
+{
+	const struct gfs2_dinode_host *di = &ip->i_di;
+
+	printk(KERN_INFO "  no_formal_ino = %llu\n",
+	       (unsigned long long)ip->i_no_formal_ino);
+	printk(KERN_INFO "  no_addr = %llu\n",
+	       (unsigned long long)ip->i_no_addr);
+	printk(KERN_INFO "  di_size = %llu\n", (unsigned long long)di->di_size);
+	printk(KERN_INFO "  di_blocks = %llu\n",
+	       (unsigned long long)di->di_blocks);
+	printk(KERN_INFO "  di_goal_meta = %llu\n",
+	       (unsigned long long)di->di_goal_meta);
+	printk(KERN_INFO "  di_goal_data = %llu\n",
+	       (unsigned long long)di->di_goal_data);
+	printk(KERN_INFO "  di_flags = 0x%.8X\n", di->di_flags);
+	printk(KERN_INFO "  di_height = %u\n", di->di_height);
+	printk(KERN_INFO "  di_depth = %u\n", di->di_depth);
+	printk(KERN_INFO "  di_entries = %u\n", di->di_entries);
+	printk(KERN_INFO "  di_eattr = %llu\n",
+	       (unsigned long long)di->di_eattr);
+}
+
diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h
index b57f448..4517ac8 100644
--- a/fs/gfs2/inode.h
+++ b/fs/gfs2/inode.h
@@ -10,17 +10,17 @@
 #ifndef __INODE_DOT_H__
 #define __INODE_DOT_H__
 
-static inline int gfs2_is_stuffed(struct gfs2_inode *ip)
+static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
 {
 	return !ip->i_di.di_height;
 }
 
-static inline int gfs2_is_jdata(struct gfs2_inode *ip)
+static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
 {
 	return ip->i_di.di_flags & GFS2_DIF_JDATA;
 }
 
-static inline int gfs2_is_dir(struct gfs2_inode *ip)
+static inline int gfs2_is_dir(const struct gfs2_inode *ip)
 {
 	return S_ISDIR(ip->i_inode.i_mode);
 }
@@ -32,9 +32,25 @@ static inline void gfs2_set_inode_blocks(struct inode *inode)
 		(GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
 }
 
+static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
+				  u64 no_formal_ino)
+{
+	return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
+}
+
+static inline void gfs2_inum_out(const struct gfs2_inode *ip,
+				 struct gfs2_dirent *dent)
+{
+	dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
+	dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
+}
+
+
 void gfs2_inode_attr_in(struct gfs2_inode *ip);
-struct inode *gfs2_inode_lookup(struct super_block *sb, struct gfs2_inum_host *inum, unsigned type);
-struct inode *gfs2_ilookup(struct super_block *sb, struct gfs2_inum_host *inum);
+void gfs2_set_iop(struct inode *inode);
+struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, 
+				u64 no_addr, u64 no_formal_ino);
+struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr);
 
 int gfs2_inode_refresh(struct gfs2_inode *ip);
 
@@ -47,12 +63,14 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
 int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
 		struct gfs2_inode *ip);
 int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
-		   struct gfs2_inode *ip);
+		   const struct gfs2_inode *ip);
 int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to);
 int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len);
 int gfs2_glock_nq_atime(struct gfs2_holder *gh);
 int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr);
 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
+void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
+void gfs2_dinode_print(const struct gfs2_inode *ip);
 
 #endif /* __INODE_DOT_H__ */
 
diff --git a/fs/gfs2/locking/dlm/lock.c b/fs/gfs2/locking/dlm/lock.c
index c305255..542a797 100644
--- a/fs/gfs2/locking/dlm/lock.c
+++ b/fs/gfs2/locking/dlm/lock.c
@@ -174,7 +174,6 @@ static int gdlm_create_lp(struct gdlm_ls *ls, struct lm_lockname *name,
 	lp->cur = DLM_LOCK_IV;
 	lp->lvb = NULL;
 	lp->hold_null = NULL;
-	init_completion(&lp->ast_wait);
 	INIT_LIST_HEAD(&lp->clist);
 	INIT_LIST_HEAD(&lp->blist);
 	INIT_LIST_HEAD(&lp->delay_list);
@@ -399,6 +398,12 @@ static void gdlm_del_lvb(struct gdlm_lock *lp)
 	lp->lksb.sb_lvbptr = NULL;
 }
 
+static int gdlm_ast_wait(void *word)
+{
+	schedule();
+	return 0;
+}
+
 /* This can do a synchronous dlm request (requiring a lock_dlm thread to get
    the completion) because gfs won't call hold_lvb() during a callback (from
    the context of a lock_dlm thread). */
@@ -424,10 +429,10 @@ static int hold_null_lock(struct gdlm_lock *lp)
 	lpn->lkf = DLM_LKF_VALBLK | DLM_LKF_EXPEDITE;
 	set_bit(LFL_NOBAST, &lpn->flags);
 	set_bit(LFL_INLOCK, &lpn->flags);
+	set_bit(LFL_AST_WAIT, &lpn->flags);
 
-	init_completion(&lpn->ast_wait);
 	gdlm_do_lock(lpn);
-	wait_for_completion(&lpn->ast_wait);
+	wait_on_bit(&lpn->flags, LFL_AST_WAIT, gdlm_ast_wait, TASK_UNINTERRUPTIBLE);
 	error = lpn->lksb.sb_status;
 	if (error) {
 		printk(KERN_INFO "lock_dlm: hold_null_lock dlm error %d\n",
diff --git a/fs/gfs2/locking/dlm/lock_dlm.h b/fs/gfs2/locking/dlm/lock_dlm.h
index d074c6e..24d70f7 100644
--- a/fs/gfs2/locking/dlm/lock_dlm.h
+++ b/fs/gfs2/locking/dlm/lock_dlm.h
@@ -101,6 +101,7 @@ enum {
 	LFL_NOBAST		= 10,
 	LFL_HEADQUE		= 11,
 	LFL_UNLOCK_DELETE	= 12,
+	LFL_AST_WAIT		= 13,
 };
 
 struct gdlm_lock {
@@ -117,7 +118,6 @@ struct gdlm_lock {
 	unsigned long		flags;		/* lock_dlm flags LFL_ */
 
 	int			bast_mode;	/* protected by async_lock */
-	struct completion	ast_wait;
 
 	struct list_head	clist;		/* complete */
 	struct list_head	blist;		/* blocking */
diff --git a/fs/gfs2/locking/dlm/mount.c b/fs/gfs2/locking/dlm/mount.c
index 1d8faa3..41c5b04 100644
--- a/fs/gfs2/locking/dlm/mount.c
+++ b/fs/gfs2/locking/dlm/mount.c
@@ -147,7 +147,7 @@ static int gdlm_mount(char *table_name, char *host_data,
 
 	error = dlm_new_lockspace(ls->fsname, strlen(ls->fsname),
 				  &ls->dlm_lockspace,
-				  nodir ? DLM_LSFL_NODIR : 0,
+				  DLM_LSFL_FS | (nodir ? DLM_LSFL_NODIR : 0),
 				  GDLM_LVB_SIZE);
 	if (error) {
 		log_error("dlm_new_lockspace error %d", error);
diff --git a/fs/gfs2/locking/dlm/plock.c b/fs/gfs2/locking/dlm/plock.c
index f82495e..fba1f1d 100644
--- a/fs/gfs2/locking/dlm/plock.c
+++ b/fs/gfs2/locking/dlm/plock.c
@@ -242,7 +242,7 @@ int gdlm_plock_get(void *lockspace, struct lm_lockname *name,
 	op->info.number		= name->ln_number;
 	op->info.start		= fl->fl_start;
 	op->info.end		= fl->fl_end;
-
+	op->info.owner		= (__u64)(long) fl->fl_owner;
 
 	send_op(op);
 	wait_event(recv_wq, (op->done != 0));
@@ -254,16 +254,20 @@ int gdlm_plock_get(void *lockspace, struct lm_lockname *name,
 	}
 	spin_unlock(&ops_lock);
 
+	/* info.rv from userspace is 1 for conflict, 0 for no-conflict,
+	   -ENOENT if there are no locks on the file */
+
 	rv = op->info.rv;
 
 	fl->fl_type = F_UNLCK;
 	if (rv == -ENOENT)
 		rv = 0;
-	else if (rv == 0 && op->info.pid != fl->fl_pid) {
+	else if (rv > 0) {
 		fl->fl_type = (op->info.ex) ? F_WRLCK : F_RDLCK;
 		fl->fl_pid = op->info.pid;
 		fl->fl_start = op->info.start;
 		fl->fl_end = op->info.end;
+		rv = 0;
 	}
 
 	kfree(op);
diff --git a/fs/gfs2/locking/dlm/thread.c b/fs/gfs2/locking/dlm/thread.c
index 9cf1f16..1aca51e 100644
--- a/fs/gfs2/locking/dlm/thread.c
+++ b/fs/gfs2/locking/dlm/thread.c
@@ -44,6 +44,13 @@ static void process_blocking(struct gdlm_lock *lp, int bast_mode)
 	ls->fscb(ls->sdp, cb, &lp->lockname);
 }
 
+static void wake_up_ast(struct gdlm_lock *lp)
+{
+	clear_bit(LFL_AST_WAIT, &lp->flags);
+	smp_mb__after_clear_bit();
+	wake_up_bit(&lp->flags, LFL_AST_WAIT);
+}
+
 static void process_complete(struct gdlm_lock *lp)
 {
 	struct gdlm_ls *ls = lp->ls;
@@ -136,7 +143,7 @@ static void process_complete(struct gdlm_lock *lp)
 	 */
 
 	if (test_and_clear_bit(LFL_SYNC_LVB, &lp->flags)) {
-		complete(&lp->ast_wait);
+		wake_up_ast(lp);
 		return;
 	}
 
@@ -214,7 +221,7 @@ out:
 	if (test_bit(LFL_INLOCK, &lp->flags)) {
 		clear_bit(LFL_NOBLOCK, &lp->flags);
 		lp->cur = lp->req;
-		complete(&lp->ast_wait);
+		wake_up_ast(lp);
 		return;
 	}
 
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index 291415d..f49a12e 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -83,6 +83,11 @@ static void gfs2_ail1_start_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
 
 			gfs2_assert(sdp, bd->bd_ail == ai);
 
+			if (!bh){
+				list_move(&bd->bd_ail_st_list, &ai->ai_ail2_list);
+                                continue;
+                        }
+
 			if (!buffer_busy(bh)) {
 				if (!buffer_uptodate(bh)) {
 					gfs2_log_unlock(sdp);
@@ -125,6 +130,11 @@ static int gfs2_ail1_empty_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai, int fl
 					 bd_ail_st_list) {
 		bh = bd->bd_bh;
 
+		if (!bh){
+			list_move(&bd->bd_ail_st_list, &ai->ai_ail2_list);
+			continue;
+		}
+
 		gfs2_assert(sdp, bd->bd_ail == ai);
 
 		if (buffer_busy(bh)) {
@@ -262,8 +272,8 @@ static void ail2_empty(struct gfs2_sbd *sdp, unsigned int new_tail)
  * @sdp: The GFS2 superblock
  * @blks: The number of blocks to reserve
  *
- * Note that we never give out the last 6 blocks of the journal. Thats
- * due to the fact that there is are a small number of header blocks
+ * Note that we never give out the last few blocks of the journal. Thats
+ * due to the fact that there is a small number of header blocks
  * associated with each log flush. The exact number can't be known until
  * flush time, so we ensure that we have just enough free blocks at all
  * times to avoid running out during a log flush.
@@ -274,6 +284,7 @@ static void ail2_empty(struct gfs2_sbd *sdp, unsigned int new_tail)
 int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks)
 {
 	unsigned int try = 0;
+	unsigned reserved_blks = 6 * (4096 / sdp->sd_vfs->s_blocksize);
 
 	if (gfs2_assert_warn(sdp, blks) ||
 	    gfs2_assert_warn(sdp, blks <= sdp->sd_jdesc->jd_blocks))
@@ -281,7 +292,7 @@ int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks)
 
 	mutex_lock(&sdp->sd_log_reserve_mutex);
 	gfs2_log_lock(sdp);
-	while(sdp->sd_log_blks_free <= (blks + 6)) {
+	while(sdp->sd_log_blks_free <= (blks + reserved_blks)) {
 		gfs2_log_unlock(sdp);
 		gfs2_ail1_empty(sdp, 0);
 		gfs2_log_flush(sdp, NULL);
@@ -357,6 +368,58 @@ static inline unsigned int log_distance(struct gfs2_sbd *sdp, unsigned int newer
 	return dist;
 }
 
+/**
+ * calc_reserved - Calculate the number of blocks to reserve when
+ *                 refunding a transaction's unused buffers.
+ * @sdp: The GFS2 superblock
+ *
+ * This is complex.  We need to reserve room for all our currently used
+ * metadata buffers (e.g. normal file I/O rewriting file time stamps) and 
+ * all our journaled data buffers for journaled files (e.g. files in the 
+ * meta_fs like rindex, or files for which chattr +j was done.)
+ * If we don't reserve enough space, gfs2_log_refund and gfs2_log_flush
+ * will count it as free space (sd_log_blks_free) and corruption will follow.
+ *
+ * We can have metadata bufs and jdata bufs in the same journal.  So each
+ * type gets its own log header, for which we need to reserve a block.
+ * In fact, each type has the potential for needing more than one header 
+ * in cases where we have more buffers than will fit on a journal page.
+ * Metadata journal entries take up half the space of journaled buffer entries.
+ * Thus, metadata entries have buf_limit (502) and journaled buffers have
+ * databuf_limit (251) before they cause a wrap around.
+ *
+ * Also, we need to reserve blocks for revoke journal entries and one for an
+ * overall header for the lot.
+ *
+ * Returns: the number of blocks reserved
+ */
+static unsigned int calc_reserved(struct gfs2_sbd *sdp)
+{
+	unsigned int reserved = 0;
+	unsigned int mbuf_limit, metabufhdrs_needed;
+	unsigned int dbuf_limit, databufhdrs_needed;
+	unsigned int revokes = 0;
+
+	mbuf_limit = buf_limit(sdp);
+	metabufhdrs_needed = (sdp->sd_log_commited_buf +
+			      (mbuf_limit - 1)) / mbuf_limit;
+	dbuf_limit = databuf_limit(sdp);
+	databufhdrs_needed = (sdp->sd_log_commited_databuf +
+			      (dbuf_limit - 1)) / dbuf_limit;
+
+	if (sdp->sd_log_commited_revoke)
+		revokes = gfs2_struct2blk(sdp, sdp->sd_log_commited_revoke,
+					  sizeof(u64));
+
+	reserved = sdp->sd_log_commited_buf + metabufhdrs_needed +
+		sdp->sd_log_commited_databuf + databufhdrs_needed +
+		revokes;
+	/* One for the overall header */
+	if (reserved)
+		reserved++;
+	return reserved;
+}
+
 static unsigned int current_tail(struct gfs2_sbd *sdp)
 {
 	struct gfs2_ail *ai;
@@ -447,14 +510,14 @@ struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp,
 	return bh;
 }
 
-static void log_pull_tail(struct gfs2_sbd *sdp, unsigned int new_tail, int pull)
+static void log_pull_tail(struct gfs2_sbd *sdp, unsigned int new_tail)
 {
 	unsigned int dist = log_distance(sdp, new_tail, sdp->sd_log_tail);
 
 	ail2_empty(sdp, new_tail);
 
 	gfs2_log_lock(sdp);
-	sdp->sd_log_blks_free += dist - (pull ? 1 : 0);
+	sdp->sd_log_blks_free += dist;
 	gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks);
 	gfs2_log_unlock(sdp);
 
@@ -504,7 +567,7 @@ static void log_write_header(struct gfs2_sbd *sdp, u32 flags, int pull)
 	brelse(bh);
 
 	if (sdp->sd_log_tail != tail)
-		log_pull_tail(sdp, tail, pull);
+		log_pull_tail(sdp, tail);
 	else
 		gfs2_assert_withdraw(sdp, !pull);
 
@@ -517,6 +580,7 @@ static void log_flush_commit(struct gfs2_sbd *sdp)
 	struct list_head *head = &sdp->sd_log_flush_list;
 	struct gfs2_log_buf *lb;
 	struct buffer_head *bh;
+	int flushcount = 0;
 
 	while (!list_empty(head)) {
 		lb = list_entry(head->next, struct gfs2_log_buf, lb_list);
@@ -533,9 +597,20 @@ static void log_flush_commit(struct gfs2_sbd *sdp)
 		} else
 			brelse(bh);
 		kfree(lb);
+		flushcount++;
 	}
 
-	log_write_header(sdp, 0, 0);
+	/* If nothing was journaled, the header is unplanned and unwanted. */
+	if (flushcount) {
+		log_write_header(sdp, 0, 0);
+	} else {
+		unsigned int tail;
+		tail = current_tail(sdp);
+
+		gfs2_ail1_empty(sdp, 0);
+		if (sdp->sd_log_tail != tail)
+			log_pull_tail(sdp, tail);
+	}
 }
 
 /**
@@ -565,7 +640,10 @@ void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl)
 	INIT_LIST_HEAD(&ai->ai_ail1_list);
 	INIT_LIST_HEAD(&ai->ai_ail2_list);
 
-	gfs2_assert_withdraw(sdp, sdp->sd_log_num_buf == sdp->sd_log_commited_buf);
+	gfs2_assert_withdraw(sdp,
+			     sdp->sd_log_num_buf + sdp->sd_log_num_jdata ==
+			     sdp->sd_log_commited_buf +
+			     sdp->sd_log_commited_databuf);
 	gfs2_assert_withdraw(sdp,
 			sdp->sd_log_num_revoke == sdp->sd_log_commited_revoke);
 
@@ -576,16 +654,19 @@ void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl)
 	lops_before_commit(sdp);
 	if (!list_empty(&sdp->sd_log_flush_list))
 		log_flush_commit(sdp);
-	else if (sdp->sd_log_tail != current_tail(sdp) && !sdp->sd_log_idle)
+	else if (sdp->sd_log_tail != current_tail(sdp) && !sdp->sd_log_idle){
+		gfs2_log_lock(sdp);
+		sdp->sd_log_blks_free--; /* Adjust for unreserved buffer */
+		gfs2_log_unlock(sdp);
 		log_write_header(sdp, 0, PULL);
+	}
 	lops_after_commit(sdp, ai);
 
 	gfs2_log_lock(sdp);
 	sdp->sd_log_head = sdp->sd_log_flush_head;
-	sdp->sd_log_blks_free -= sdp->sd_log_num_hdrs;
 	sdp->sd_log_blks_reserved = 0;
 	sdp->sd_log_commited_buf = 0;
-	sdp->sd_log_num_hdrs = 0;
+	sdp->sd_log_commited_databuf = 0;
 	sdp->sd_log_commited_revoke = 0;
 
 	if (!list_empty(&ai->ai_ail1_list)) {
@@ -602,32 +683,26 @@ void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl)
 
 static void log_refund(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
 {
-	unsigned int reserved = 0;
+	unsigned int reserved;
 	unsigned int old;
 
 	gfs2_log_lock(sdp);
 
 	sdp->sd_log_commited_buf += tr->tr_num_buf_new - tr->tr_num_buf_rm;
-	gfs2_assert_withdraw(sdp, ((int)sdp->sd_log_commited_buf) >= 0);
+	sdp->sd_log_commited_databuf += tr->tr_num_databuf_new -
+		tr->tr_num_databuf_rm;
+	gfs2_assert_withdraw(sdp, (((int)sdp->sd_log_commited_buf) >= 0) ||
+			     (((int)sdp->sd_log_commited_databuf) >= 0));
 	sdp->sd_log_commited_revoke += tr->tr_num_revoke - tr->tr_num_revoke_rm;
 	gfs2_assert_withdraw(sdp, ((int)sdp->sd_log_commited_revoke) >= 0);
-
-	if (sdp->sd_log_commited_buf)
-		reserved += sdp->sd_log_commited_buf;
-	if (sdp->sd_log_commited_revoke)
-		reserved += gfs2_struct2blk(sdp, sdp->sd_log_commited_revoke,
-					    sizeof(u64));
-	if (reserved)
-		reserved++;
-
+	reserved = calc_reserved(sdp);
 	old = sdp->sd_log_blks_free;
 	sdp->sd_log_blks_free += tr->tr_reserved -
 				 (reserved - sdp->sd_log_blks_reserved);
 
 	gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free >= old);
-	gfs2_assert_withdraw(sdp,
-			     sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks +
-			     sdp->sd_log_num_hdrs);
+	gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free <=
+			     sdp->sd_jdesc->jd_blocks);
 
 	sdp->sd_log_blks_reserved = reserved;
 
@@ -673,13 +748,13 @@ void gfs2_log_shutdown(struct gfs2_sbd *sdp)
 	gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke);
 	gfs2_assert_withdraw(sdp, !sdp->sd_log_num_rg);
 	gfs2_assert_withdraw(sdp, !sdp->sd_log_num_databuf);
-	gfs2_assert_withdraw(sdp, !sdp->sd_log_num_hdrs);
 	gfs2_assert_withdraw(sdp, list_empty(&sdp->sd_ail1_list));
 
 	sdp->sd_log_flush_head = sdp->sd_log_head;
 	sdp->sd_log_flush_wrapped = 0;
 
-	log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT, 0);
+	log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT,
+			 (sdp->sd_log_tail == current_tail(sdp)) ? 0 : PULL);
 
 	gfs2_assert_warn(sdp, sdp->sd_log_blks_free == sdp->sd_jdesc->jd_blocks);
 	gfs2_assert_warn(sdp, sdp->sd_log_head == sdp->sd_log_tail);
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index f82d84d..aff70f0 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -17,6 +17,7 @@
 
 #include "gfs2.h"
 #include "incore.h"
+#include "inode.h"
 #include "glock.h"
 #include "log.h"
 #include "lops.h"
@@ -117,15 +118,13 @@ static void buf_lo_before_commit(struct gfs2_sbd *sdp)
 	struct gfs2_log_descriptor *ld;
 	struct gfs2_bufdata *bd1 = NULL, *bd2;
 	unsigned int total = sdp->sd_log_num_buf;
-	unsigned int offset = sizeof(struct gfs2_log_descriptor);
+	unsigned int offset = BUF_OFFSET;
 	unsigned int limit;
 	unsigned int num;
 	unsigned n;
 	__be64 *ptr;
 
-	offset += sizeof(__be64) - 1;
-	offset &= ~(sizeof(__be64) - 1);
-	limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64);
+	limit = buf_limit(sdp);
 	/* for 4k blocks, limit = 503 */
 
 	bd1 = bd2 = list_prepare_entry(bd1, &sdp->sd_log_le_buf, bd_le.le_list);
@@ -134,7 +133,6 @@ static void buf_lo_before_commit(struct gfs2_sbd *sdp)
 		if (total > limit)
 			num = limit;
 		bh = gfs2_log_get_buf(sdp);
-		sdp->sd_log_num_hdrs++;
 		ld = (struct gfs2_log_descriptor *)bh->b_data;
 		ptr = (__be64 *)(bh->b_data + offset);
 		ld->ld_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
@@ -469,25 +467,28 @@ static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
 	struct gfs2_inode *ip = GFS2_I(mapping->host);
 
 	gfs2_log_lock(sdp);
+	if (!list_empty(&bd->bd_list_tr)) {
+		gfs2_log_unlock(sdp);
+		return;
+	}
 	tr->tr_touched = 1;
-	if (list_empty(&bd->bd_list_tr) &&
-	    (ip->i_di.di_flags & GFS2_DIF_JDATA)) {
+	if (gfs2_is_jdata(ip)) {
 		tr->tr_num_buf++;
 		list_add(&bd->bd_list_tr, &tr->tr_list_buf);
-		gfs2_log_unlock(sdp);
-		gfs2_pin(sdp, bd->bd_bh);
-		tr->tr_num_buf_new++;
-	} else {
-		gfs2_log_unlock(sdp);
 	}
+	gfs2_log_unlock(sdp);
+	if (!list_empty(&le->le_list))
+		return;
+
 	gfs2_trans_add_gl(bd->bd_gl);
-	gfs2_log_lock(sdp);
-	if (list_empty(&le->le_list)) {
-		if (ip->i_di.di_flags & GFS2_DIF_JDATA)
-			sdp->sd_log_num_jdata++;
-		sdp->sd_log_num_databuf++;
-		list_add(&le->le_list, &sdp->sd_log_le_databuf);
+	if (gfs2_is_jdata(ip)) {
+		sdp->sd_log_num_jdata++;
+		gfs2_pin(sdp, bd->bd_bh);
+		tr->tr_num_databuf_new++;
 	}
+	sdp->sd_log_num_databuf++;
+	gfs2_log_lock(sdp);
+	list_add(&le->le_list, &sdp->sd_log_le_databuf);
 	gfs2_log_unlock(sdp);
 }
 
@@ -520,7 +521,6 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
 	LIST_HEAD(started);
 	struct gfs2_bufdata *bd1 = NULL, *bd2, *bdt;
 	struct buffer_head *bh = NULL,*bh1 = NULL;
-	unsigned int offset = sizeof(struct gfs2_log_descriptor);
 	struct gfs2_log_descriptor *ld;
 	unsigned int limit;
 	unsigned int total_dbuf = sdp->sd_log_num_databuf;
@@ -528,9 +528,7 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
 	unsigned int num, n;
 	__be64 *ptr = NULL;
 
-	offset += 2*sizeof(__be64) - 1;
-	offset &= ~(2*sizeof(__be64) - 1);
-	limit = (sdp->sd_sb.sb_bsize - offset)/sizeof(__be64);
+	limit = databuf_limit(sdp);
 
 	/*
 	 * Start writing ordered buffers, write journaled buffers
@@ -581,10 +579,10 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
 				gfs2_log_unlock(sdp);
 				if (!bh) {
 					bh = gfs2_log_get_buf(sdp);
-					sdp->sd_log_num_hdrs++;
 					ld = (struct gfs2_log_descriptor *)
 					     bh->b_data;
-					ptr = (__be64 *)(bh->b_data + offset);
+					ptr = (__be64 *)(bh->b_data +
+							 DATABUF_OFFSET);
 					ld->ld_header.mh_magic =
 						cpu_to_be32(GFS2_MAGIC);
 					ld->ld_header.mh_type =
@@ -605,7 +603,7 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
 				if (unlikely(magic != 0))
 					set_buffer_escaped(bh1);
 				gfs2_log_lock(sdp);
-				if (n++ > num)
+				if (++n >= num)
 					break;
 			} else if (!bh1) {
 				total_dbuf--;
@@ -622,6 +620,7 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp)
 		}
 		gfs2_log_unlock(sdp);
 		if (bh) {
+			set_buffer_mapped(bh);
 			set_buffer_dirty(bh);
 			ll_rw_block(WRITE, 1, &bh);
 			bh = NULL;
diff --git a/fs/gfs2/lops.h b/fs/gfs2/lops.h
index 965bc65..41a00df 100644
--- a/fs/gfs2/lops.h
+++ b/fs/gfs2/lops.h
@@ -13,6 +13,13 @@
 #include <linux/list.h>
 #include "incore.h"
 
+#define BUF_OFFSET \
+	((sizeof(struct gfs2_log_descriptor) + sizeof(__be64) - 1) & \
+	 ~(sizeof(__be64) - 1))
+#define DATABUF_OFFSET \
+	((sizeof(struct gfs2_log_descriptor) + (2 * sizeof(__be64) - 1)) & \
+	 ~(2 * sizeof(__be64) - 1))
+
 extern const struct gfs2_log_operations gfs2_glock_lops;
 extern const struct gfs2_log_operations gfs2_buf_lops;
 extern const struct gfs2_log_operations gfs2_revoke_lops;
@@ -21,6 +28,22 @@ extern const struct gfs2_log_operations gfs2_databuf_lops;
 
 extern const struct gfs2_log_operations *gfs2_log_ops[];
 
+static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
+{
+	unsigned int limit;
+
+	limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64);
+	return limit;
+}
+
+static inline unsigned int databuf_limit(struct gfs2_sbd *sdp)
+{
+	unsigned int limit;
+
+	limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64));
+	return limit;
+}
+
 static inline void lops_init_le(struct gfs2_log_element *le,
 				const struct gfs2_log_operations *lops)
 {
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index e62d4f6..8da343b 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -387,12 +387,18 @@ void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen)
 
 			if (test_clear_buffer_pinned(bh)) {
 				struct gfs2_trans *tr = current->journal_info;
+				struct gfs2_inode *bh_ip =
+					GFS2_I(bh->b_page->mapping->host);
+
 				gfs2_log_lock(sdp);
 				list_del_init(&bd->bd_le.le_list);
 				gfs2_assert_warn(sdp, sdp->sd_log_num_buf);
 				sdp->sd_log_num_buf--;
 				gfs2_log_unlock(sdp);
-				tr->tr_num_buf_rm++;
+				if (bh_ip->i_inode.i_private != NULL)
+					tr->tr_num_databuf_rm++;
+				else
+					tr->tr_num_buf_rm++;
 				brelse(bh);
 			}
 			if (bd) {
diff --git a/fs/gfs2/meta_io.h b/fs/gfs2/meta_io.h
index e037425..527bf19 100644
--- a/fs/gfs2/meta_io.h
+++ b/fs/gfs2/meta_io.h
@@ -63,7 +63,7 @@ int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num,
 static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip,
 					 struct buffer_head **bhp)
 {
-	return gfs2_meta_indirect_buffer(ip, 0, ip->i_num.no_addr, 0, bhp);
+	return gfs2_meta_indirect_buffer(ip, 0, ip->i_no_addr, 0, bhp);
 }
 
 struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen);
diff --git a/fs/gfs2/mount.c b/fs/gfs2/mount.c
index 4864659..6f006a80 100644
--- a/fs/gfs2/mount.c
+++ b/fs/gfs2/mount.c
@@ -82,20 +82,19 @@ int gfs2_mount_args(struct gfs2_sbd *sdp, char *data_arg, int remount)
 	char *options, *o, *v;
 	int error = 0;
 
-	if (!remount) {
-		/*  If someone preloaded options, use those instead  */
-		spin_lock(&gfs2_sys_margs_lock);
-		if (gfs2_sys_margs) {
-			data = gfs2_sys_margs;
-			gfs2_sys_margs = NULL;
-		}
-		spin_unlock(&gfs2_sys_margs_lock);
-
-		/*  Set some defaults  */
-		args->ar_num_glockd = GFS2_GLOCKD_DEFAULT;
-		args->ar_quota = GFS2_QUOTA_DEFAULT;
-		args->ar_data = GFS2_DATA_DEFAULT;
+	/*  If someone preloaded options, use those instead  */
+	spin_lock(&gfs2_sys_margs_lock);
+	if (!remount && gfs2_sys_margs) {
+		data = gfs2_sys_margs;
+		gfs2_sys_margs = NULL;
 	}
+	spin_unlock(&gfs2_sys_margs_lock);
+
+	/*  Set some defaults  */
+	memset(args, 0, sizeof(struct gfs2_args));
+	args->ar_num_glockd = GFS2_GLOCKD_DEFAULT;
+	args->ar_quota = GFS2_QUOTA_DEFAULT;
+	args->ar_data = GFS2_DATA_DEFAULT;
 
 	/* Split the options into tokens with the "," character and
 	   process them */
diff --git a/fs/gfs2/ondisk.c b/fs/gfs2/ondisk.c
deleted file mode 100644
index d9ecfd2..0000000
--- a/fs/gfs2/ondisk.c
+++ /dev/null
@@ -1,251 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
- */
-
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/completion.h>
-#include <linux/buffer_head.h>
-
-#include "gfs2.h"
-#include <linux/gfs2_ondisk.h>
-#include <linux/lm_interface.h>
-#include "incore.h"
-
-#define pv(struct, member, fmt) printk(KERN_INFO "  "#member" = "fmt"\n", \
-				       struct->member);
-
-/*
- * gfs2_xxx_in - read in an xxx struct
- * first arg: the cpu-order structure
- * buf: the disk-order buffer
- *
- * gfs2_xxx_out - write out an xxx struct
- * first arg: the cpu-order structure
- * buf: the disk-order buffer
- *
- * gfs2_xxx_print - print out an xxx struct
- * first arg: the cpu-order structure
- */
-
-void gfs2_inum_in(struct gfs2_inum_host *no, const void *buf)
-{
-	const struct gfs2_inum *str = buf;
-
-	no->no_formal_ino = be64_to_cpu(str->no_formal_ino);
-	no->no_addr = be64_to_cpu(str->no_addr);
-}
-
-void gfs2_inum_out(const struct gfs2_inum_host *no, void *buf)
-{
-	struct gfs2_inum *str = buf;
-
-	str->no_formal_ino = cpu_to_be64(no->no_formal_ino);
-	str->no_addr = cpu_to_be64(no->no_addr);
-}
-
-static void gfs2_inum_print(const struct gfs2_inum_host *no)
-{
-	printk(KERN_INFO "  no_formal_ino = %llu\n", (unsigned long long)no->no_formal_ino);
-	printk(KERN_INFO "  no_addr = %llu\n", (unsigned long long)no->no_addr);
-}
-
-static void gfs2_meta_header_in(struct gfs2_meta_header_host *mh, const void *buf)
-{
-	const struct gfs2_meta_header *str = buf;
-
-	mh->mh_magic = be32_to_cpu(str->mh_magic);
-	mh->mh_type = be32_to_cpu(str->mh_type);
-	mh->mh_format = be32_to_cpu(str->mh_format);
-}
-
-void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf)
-{
-	const struct gfs2_sb *str = buf;
-
-	gfs2_meta_header_in(&sb->sb_header, buf);
-
-	sb->sb_fs_format = be32_to_cpu(str->sb_fs_format);
-	sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format);
-	sb->sb_bsize = be32_to_cpu(str->sb_bsize);
-	sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift);
-
-	gfs2_inum_in(&sb->sb_master_dir, (char *)&str->sb_master_dir);
-	gfs2_inum_in(&sb->sb_root_dir, (char *)&str->sb_root_dir);
-
-	memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
-	memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
-}
-
-void gfs2_rindex_in(struct gfs2_rindex_host *ri, const void *buf)
-{
-	const struct gfs2_rindex *str = buf;
-
-	ri->ri_addr = be64_to_cpu(str->ri_addr);
-	ri->ri_length = be32_to_cpu(str->ri_length);
-	ri->ri_data0 = be64_to_cpu(str->ri_data0);
-	ri->ri_data = be32_to_cpu(str->ri_data);
-	ri->ri_bitbytes = be32_to_cpu(str->ri_bitbytes);
-
-}
-
-void gfs2_rindex_print(const struct gfs2_rindex_host *ri)
-{
-	printk(KERN_INFO "  ri_addr = %llu\n", (unsigned long long)ri->ri_addr);
-	pv(ri, ri_length, "%u");
-
-	printk(KERN_INFO "  ri_data0 = %llu\n", (unsigned long long)ri->ri_data0);
-	pv(ri, ri_data, "%u");
-
-	pv(ri, ri_bitbytes, "%u");
-}
-
-void gfs2_rgrp_in(struct gfs2_rgrp_host *rg, const void *buf)
-{
-	const struct gfs2_rgrp *str = buf;
-
-	rg->rg_flags = be32_to_cpu(str->rg_flags);
-	rg->rg_free = be32_to_cpu(str->rg_free);
-	rg->rg_dinodes = be32_to_cpu(str->rg_dinodes);
-	rg->rg_igeneration = be64_to_cpu(str->rg_igeneration);
-}
-
-void gfs2_rgrp_out(const struct gfs2_rgrp_host *rg, void *buf)
-{
-	struct gfs2_rgrp *str = buf;
-
-	str->rg_flags = cpu_to_be32(rg->rg_flags);
-	str->rg_free = cpu_to_be32(rg->rg_free);
-	str->rg_dinodes = cpu_to_be32(rg->rg_dinodes);
-	str->__pad = cpu_to_be32(0);
-	str->rg_igeneration = cpu_to_be64(rg->rg_igeneration);
-	memset(&str->rg_reserved, 0, sizeof(str->rg_reserved));
-}
-
-void gfs2_quota_in(struct gfs2_quota_host *qu, const void *buf)
-{
-	const struct gfs2_quota *str = buf;
-
-	qu->qu_limit = be64_to_cpu(str->qu_limit);
-	qu->qu_warn = be64_to_cpu(str->qu_warn);
-	qu->qu_value = be64_to_cpu(str->qu_value);
-}
-
-void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
-{
-	const struct gfs2_dinode_host *di = &ip->i_di;
-	struct gfs2_dinode *str = buf;
-
-	str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
-	str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
-	str->di_header.__pad0 = 0;
-	str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
-	str->di_header.__pad1 = 0;
-
-	gfs2_inum_out(&ip->i_num, &str->di_num);
-
-	str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
-	str->di_uid = cpu_to_be32(ip->i_inode.i_uid);
-	str->di_gid = cpu_to_be32(ip->i_inode.i_gid);
-	str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
-	str->di_size = cpu_to_be64(di->di_size);
-	str->di_blocks = cpu_to_be64(di->di_blocks);
-	str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
-	str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
-	str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec);
-
-	str->di_goal_meta = cpu_to_be64(di->di_goal_meta);
-	str->di_goal_data = cpu_to_be64(di->di_goal_data);
-	str->di_generation = cpu_to_be64(di->di_generation);
-
-	str->di_flags = cpu_to_be32(di->di_flags);
-	str->di_height = cpu_to_be16(di->di_height);
-	str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
-					     !(ip->i_di.di_flags & GFS2_DIF_EXHASH) ?
-					     GFS2_FORMAT_DE : 0);
-	str->di_depth = cpu_to_be16(di->di_depth);
-	str->di_entries = cpu_to_be32(di->di_entries);
-
-	str->di_eattr = cpu_to_be64(di->di_eattr);
-}
-
-void gfs2_dinode_print(const struct gfs2_inode *ip)
-{
-	const struct gfs2_dinode_host *di = &ip->i_di;
-
-	gfs2_inum_print(&ip->i_num);
-
-	printk(KERN_INFO "  di_size = %llu\n", (unsigned long long)di->di_size);
-	printk(KERN_INFO "  di_blocks = %llu\n", (unsigned long long)di->di_blocks);
-	printk(KERN_INFO "  di_goal_meta = %llu\n", (unsigned long long)di->di_goal_meta);
-	printk(KERN_INFO "  di_goal_data = %llu\n", (unsigned long long)di->di_goal_data);
-
-	pv(di, di_flags, "0x%.8X");
-	pv(di, di_height, "%u");
-
-	pv(di, di_depth, "%u");
-	pv(di, di_entries, "%u");
-
-	printk(KERN_INFO "  di_eattr = %llu\n", (unsigned long long)di->di_eattr);
-}
-
-void gfs2_log_header_in(struct gfs2_log_header_host *lh, const void *buf)
-{
-	const struct gfs2_log_header *str = buf;
-
-	gfs2_meta_header_in(&lh->lh_header, buf);
-	lh->lh_sequence = be64_to_cpu(str->lh_sequence);
-	lh->lh_flags = be32_to_cpu(str->lh_flags);
-	lh->lh_tail = be32_to_cpu(str->lh_tail);
-	lh->lh_blkno = be32_to_cpu(str->lh_blkno);
-	lh->lh_hash = be32_to_cpu(str->lh_hash);
-}
-
-void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf)
-{
-	const struct gfs2_inum_range *str = buf;
-
-	ir->ir_start = be64_to_cpu(str->ir_start);
-	ir->ir_length = be64_to_cpu(str->ir_length);
-}
-
-void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf)
-{
-	struct gfs2_inum_range *str = buf;
-
-	str->ir_start = cpu_to_be64(ir->ir_start);
-	str->ir_length = cpu_to_be64(ir->ir_length);
-}
-
-void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf)
-{
-	const struct gfs2_statfs_change *str = buf;
-
-	sc->sc_total = be64_to_cpu(str->sc_total);
-	sc->sc_free = be64_to_cpu(str->sc_free);
-	sc->sc_dinodes = be64_to_cpu(str->sc_dinodes);
-}
-
-void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf)
-{
-	struct gfs2_statfs_change *str = buf;
-
-	str->sc_total = cpu_to_be64(sc->sc_total);
-	str->sc_free = cpu_to_be64(sc->sc_free);
-	str->sc_dinodes = cpu_to_be64(sc->sc_dinodes);
-}
-
-void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf)
-{
-	const struct gfs2_quota_change *str = buf;
-
-	qc->qc_change = be64_to_cpu(str->qc_change);
-	qc->qc_flags = be32_to_cpu(str->qc_flags);
-	qc->qc_id = be32_to_cpu(str->qc_id);
-}
-
diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c
index 30c1562..26c8888 100644
--- a/fs/gfs2/ops_address.c
+++ b/fs/gfs2/ops_address.c
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
+ * Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
  *
  * This copyrighted material is made available to anyone wishing to use,
  * modify, copy, or redistribute it subject to the terms and conditions
@@ -32,6 +32,7 @@
 #include "trans.h"
 #include "rgrp.h"
 #include "ops_file.h"
+#include "super.h"
 #include "util.h"
 #include "glops.h"
 
@@ -49,6 +50,8 @@ static void gfs2_page_add_databufs(struct gfs2_inode *ip, struct page *page,
 		end = start + bsize;
 		if (end <= from || start >= to)
 			continue;
+		if (gfs2_is_jdata(ip))
+			set_buffer_uptodate(bh);
 		gfs2_trans_add_bh(ip->i_gl, bh, 0);
 	}
 }
@@ -134,7 +137,9 @@ static int gfs2_writepage(struct page *page, struct writeback_control *wbc)
 		return 0; /* don't care */
 	}
 
-	if (sdp->sd_args.ar_data == GFS2_DATA_ORDERED || gfs2_is_jdata(ip)) {
+	if ((sdp->sd_args.ar_data == GFS2_DATA_ORDERED || gfs2_is_jdata(ip)) &&
+	    PageChecked(page)) {
+		ClearPageChecked(page);
 		error = gfs2_trans_begin(sdp, RES_DINODE + 1, 0);
 		if (error)
 			goto out_ignore;
@@ -203,11 +208,7 @@ static int stuffed_readpage(struct gfs2_inode *ip, struct page *page)
 	 * so we need to supply one here. It doesn't happen often.
 	 */
 	if (unlikely(page->index)) {
-		kaddr = kmap_atomic(page, KM_USER0);
-		memset(kaddr, 0, PAGE_CACHE_SIZE);
-		kunmap_atomic(kaddr, KM_USER0);
-		flush_dcache_page(page);
-		SetPageUptodate(page);
+		zero_user_page(page, 0, PAGE_CACHE_SIZE, KM_USER0);
 		return 0;
 	}
 
@@ -450,6 +451,31 @@ out_uninit:
 }
 
 /**
+ * adjust_fs_space - Adjusts the free space available due to gfs2_grow
+ * @inode: the rindex inode
+ */
+static void adjust_fs_space(struct inode *inode)
+{
+	struct gfs2_sbd *sdp = inode->i_sb->s_fs_info;
+	struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
+	struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
+	u64 fs_total, new_free;
+
+	/* Total up the file system space, according to the latest rindex. */
+	fs_total = gfs2_ri_total(sdp);
+
+	spin_lock(&sdp->sd_statfs_spin);
+	if (fs_total > (m_sc->sc_total + l_sc->sc_total))
+		new_free = fs_total - (m_sc->sc_total + l_sc->sc_total);
+	else
+		new_free = 0;
+	spin_unlock(&sdp->sd_statfs_spin);
+	fs_warn(sdp, "File system extended by %llu blocks.\n",
+		(unsigned long long)new_free);
+	gfs2_statfs_change(sdp, new_free, new_free, 0);
+}
+
+/**
  * gfs2_commit_write - Commit write to a file
  * @file: The file to write to
  * @page: The page containing the data
@@ -511,6 +537,9 @@ static int gfs2_commit_write(struct file *file, struct page *page,
 		di->di_size = cpu_to_be64(inode->i_size);
 	}
 
+	if (inode == sdp->sd_rindex)
+		adjust_fs_space(inode);
+
 	brelse(dibh);
 	gfs2_trans_end(sdp);
 	if (al->al_requested) {
@@ -543,6 +572,23 @@ fail_nounlock:
 }
 
 /**
+ * gfs2_set_page_dirty - Page dirtying function
+ * @page: The page to dirty
+ *
+ * Returns: 1 if it dirtyed the page, or 0 otherwise
+ */
+ 
+static int gfs2_set_page_dirty(struct page *page)
+{
+	struct gfs2_inode *ip = GFS2_I(page->mapping->host);
+	struct gfs2_sbd *sdp = GFS2_SB(page->mapping->host);
+
+	if (sdp->sd_args.ar_data == GFS2_DATA_ORDERED || gfs2_is_jdata(ip))
+		SetPageChecked(page);
+	return __set_page_dirty_buffers(page);
+}
+
+/**
  * gfs2_bmap - Block map function
  * @mapping: Address space info
  * @lblock: The block to map
@@ -578,6 +624,8 @@ static void discard_buffer(struct gfs2_sbd *sdp, struct buffer_head *bh)
 	if (bd) {
 		bd->bd_bh = NULL;
 		bh->b_private = NULL;
+		if (!bd->bd_ail && list_empty(&bd->bd_le.le_list))
+			kmem_cache_free(gfs2_bufdata_cachep, bd);
 	}
 	gfs2_log_unlock(sdp);
 
@@ -598,6 +646,8 @@ static void gfs2_invalidatepage(struct page *page, unsigned long offset)
 	unsigned int curr_off = 0;
 
 	BUG_ON(!PageLocked(page));
+	if (offset == 0)
+		ClearPageChecked(page);
 	if (!page_has_buffers(page))
 		return;
 
@@ -728,8 +778,8 @@ static unsigned limit = 0;
 			return;
 
 		fs_warn(sdp, "ip = %llu %llu\n",
-			(unsigned long long)ip->i_num.no_formal_ino,
-			(unsigned long long)ip->i_num.no_addr);
+			(unsigned long long)ip->i_no_formal_ino,
+			(unsigned long long)ip->i_no_addr);
 
 		for (x = 0; x < GFS2_MAX_META_HEIGHT; x++)
 			fs_warn(sdp, "ip->i_cache[%u] = %s\n",
@@ -810,6 +860,7 @@ const struct address_space_operations gfs2_file_aops = {
 	.sync_page = block_sync_page,
 	.prepare_write = gfs2_prepare_write,
 	.commit_write = gfs2_commit_write,
+	.set_page_dirty = gfs2_set_page_dirty,
 	.bmap = gfs2_bmap,
 	.invalidatepage = gfs2_invalidatepage,
 	.releasepage = gfs2_releasepage,
diff --git a/fs/gfs2/ops_address.h b/fs/gfs2/ops_address.h
index 35aaee4a..fa1b5b3 100644
--- a/fs/gfs2/ops_address.h
+++ b/fs/gfs2/ops_address.h
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
+ * Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
  *
  * This copyrighted material is made available to anyone wishing to use,
  * modify, copy, or redistribute it subject to the terms and conditions
diff --git a/fs/gfs2/ops_dentry.c b/fs/gfs2/ops_dentry.c
index a6fdc52..793e334 100644
--- a/fs/gfs2/ops_dentry.c
+++ b/fs/gfs2/ops_dentry.c
@@ -21,6 +21,7 @@
 #include "glock.h"
 #include "ops_dentry.h"
 #include "util.h"
+#include "inode.h"
 
 /**
  * gfs2_drevalidate - Check directory lookup consistency
@@ -40,14 +41,15 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
 	struct gfs2_inode *dip = GFS2_I(parent->d_inode);
 	struct inode *inode = dentry->d_inode;
 	struct gfs2_holder d_gh;
-	struct gfs2_inode *ip;
-	struct gfs2_inum_host inum;
-	unsigned int type;
+	struct gfs2_inode *ip = NULL;
 	int error;
 	int had_lock=0;
 
-	if (inode && is_bad_inode(inode))
-		goto invalid;
+	if (inode) {
+		if (is_bad_inode(inode))
+			goto invalid;
+		ip = GFS2_I(inode);
+	}
 
 	if (sdp->sd_args.ar_localcaching)
 		goto valid;
@@ -59,7 +61,7 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
 			goto fail;
 	} 
 
-	error = gfs2_dir_search(parent->d_inode, &dentry->d_name, &inum, &type);
+	error = gfs2_dir_check(parent->d_inode, &dentry->d_name, ip);
 	switch (error) {
 	case 0:
 		if (!inode)
@@ -73,16 +75,6 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
 		goto fail_gunlock;
 	}
 
-	ip = GFS2_I(inode);
-
-	if (!gfs2_inum_equal(&ip->i_num, &inum))
-		goto invalid_gunlock;
-
-	if (IF2DT(ip->i_inode.i_mode) != type) {
-		gfs2_consist_inode(dip);
-		goto fail_gunlock;
-	}
-
 valid_gunlock:
 	if (!had_lock)
 		gfs2_glock_dq_uninit(&d_gh);
diff --git a/fs/gfs2/ops_export.c b/fs/gfs2/ops_export.c
index aad9183..b8312ed 100644
--- a/fs/gfs2/ops_export.c
+++ b/fs/gfs2/ops_export.c
@@ -11,6 +11,7 @@
 #include <linux/spinlock.h>
 #include <linux/completion.h>
 #include <linux/buffer_head.h>
+#include <linux/exportfs.h>
 #include <linux/gfs2_ondisk.h>
 #include <linux/crc32.h>
 #include <linux/lm_interface.h>
@@ -22,10 +23,14 @@
 #include "glops.h"
 #include "inode.h"
 #include "ops_dentry.h"
-#include "ops_export.h"
+#include "ops_fstype.h"
 #include "rgrp.h"
 #include "util.h"
 
+#define GFS2_SMALL_FH_SIZE 4
+#define GFS2_LARGE_FH_SIZE 8
+#define GFS2_OLD_FH_SIZE 10
+
 static struct dentry *gfs2_decode_fh(struct super_block *sb,
 				     __u32 *p,
 				     int fh_len,
@@ -35,31 +40,28 @@ static struct dentry *gfs2_decode_fh(struct super_block *sb,
 				     void *context)
 {
 	__be32 *fh = (__force __be32 *)p;
-	struct gfs2_fh_obj fh_obj;
-	struct gfs2_inum_host *this, parent;
+	struct gfs2_inum_host inum, parent;
 
-	this 		= &fh_obj.this;
-	fh_obj.imode 	= DT_UNKNOWN;
 	memset(&parent, 0, sizeof(struct gfs2_inum));
 
 	switch (fh_len) {
 	case GFS2_LARGE_FH_SIZE:
+	case GFS2_OLD_FH_SIZE:
 		parent.no_formal_ino = ((u64)be32_to_cpu(fh[4])) << 32;
 		parent.no_formal_ino |= be32_to_cpu(fh[5]);
 		parent.no_addr = ((u64)be32_to_cpu(fh[6])) << 32;
 		parent.no_addr |= be32_to_cpu(fh[7]);
-		fh_obj.imode = be32_to_cpu(fh[8]);
 	case GFS2_SMALL_FH_SIZE:
-		this->no_formal_ino = ((u64)be32_to_cpu(fh[0])) << 32;
-		this->no_formal_ino |= be32_to_cpu(fh[1]);
-		this->no_addr = ((u64)be32_to_cpu(fh[2])) << 32;
-		this->no_addr |= be32_to_cpu(fh[3]);
+		inum.no_formal_ino = ((u64)be32_to_cpu(fh[0])) << 32;
+		inum.no_formal_ino |= be32_to_cpu(fh[1]);
+		inum.no_addr = ((u64)be32_to_cpu(fh[2])) << 32;
+		inum.no_addr |= be32_to_cpu(fh[3]);
 		break;
 	default:
 		return NULL;
 	}
 
-	return gfs2_export_ops.find_exported_dentry(sb, &fh_obj, &parent,
+	return gfs2_export_ops.find_exported_dentry(sb, &inum, &parent,
 						    acceptable, context);
 }
 
@@ -75,10 +77,10 @@ static int gfs2_encode_fh(struct dentry *dentry, __u32 *p, int *len,
 	    (connectable && *len < GFS2_LARGE_FH_SIZE))
 		return 255;
 
-	fh[0] = cpu_to_be32(ip->i_num.no_formal_ino >> 32);
-	fh[1] = cpu_to_be32(ip->i_num.no_formal_ino & 0xFFFFFFFF);
-	fh[2] = cpu_to_be32(ip->i_num.no_addr >> 32);
-	fh[3] = cpu_to_be32(ip->i_num.no_addr & 0xFFFFFFFF);
+	fh[0] = cpu_to_be32(ip->i_no_formal_ino >> 32);
+	fh[1] = cpu_to_be32(ip->i_no_formal_ino & 0xFFFFFFFF);
+	fh[2] = cpu_to_be32(ip->i_no_addr >> 32);
+	fh[3] = cpu_to_be32(ip->i_no_addr & 0xFFFFFFFF);
 	*len = GFS2_SMALL_FH_SIZE;
 
 	if (!connectable || inode == sb->s_root->d_inode)
@@ -90,13 +92,10 @@ static int gfs2_encode_fh(struct dentry *dentry, __u32 *p, int *len,
 	igrab(inode);
 	spin_unlock(&dentry->d_lock);
 
-	fh[4] = cpu_to_be32(ip->i_num.no_formal_ino >> 32);
-	fh[5] = cpu_to_be32(ip->i_num.no_formal_ino & 0xFFFFFFFF);
-	fh[6] = cpu_to_be32(ip->i_num.no_addr >> 32);
-	fh[7] = cpu_to_be32(ip->i_num.no_addr & 0xFFFFFFFF);
-
-	fh[8]  = cpu_to_be32(inode->i_mode);
-	fh[9]  = 0;	/* pad to double word */
+	fh[4] = cpu_to_be32(ip->i_no_formal_ino >> 32);
+	fh[5] = cpu_to_be32(ip->i_no_formal_ino & 0xFFFFFFFF);
+	fh[6] = cpu_to_be32(ip->i_no_addr >> 32);
+	fh[7] = cpu_to_be32(ip->i_no_addr & 0xFFFFFFFF);
 	*len = GFS2_LARGE_FH_SIZE;
 
 	iput(inode);
@@ -144,7 +143,8 @@ static int gfs2_get_name(struct dentry *parent, char *name,
 	ip = GFS2_I(inode);
 
 	*name = 0;
-	gnfd.inum = ip->i_num;
+	gnfd.inum.no_addr = ip->i_no_addr;
+	gnfd.inum.no_formal_ino = ip->i_no_formal_ino;
 	gnfd.name = name;
 
 	error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &gh);
@@ -192,8 +192,7 @@ static struct dentry *gfs2_get_parent(struct dentry *child)
 static struct dentry *gfs2_get_dentry(struct super_block *sb, void *inum_obj)
 {
 	struct gfs2_sbd *sdp = sb->s_fs_info;
-	struct gfs2_fh_obj *fh_obj = (struct gfs2_fh_obj *)inum_obj;
-	struct gfs2_inum_host *inum = &fh_obj->this;
+	struct gfs2_inum_host *inum = inum_obj;
 	struct gfs2_holder i_gh, ri_gh, rgd_gh;
 	struct gfs2_rgrpd *rgd;
 	struct inode *inode;
@@ -202,9 +201,9 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb, void *inum_obj)
 
 	/* System files? */
 
-	inode = gfs2_ilookup(sb, inum);
+	inode = gfs2_ilookup(sb, inum->no_addr);
 	if (inode) {
-		if (GFS2_I(inode)->i_num.no_formal_ino != inum->no_formal_ino) {
+		if (GFS2_I(inode)->i_no_formal_ino != inum->no_formal_ino) {
 			iput(inode);
 			return ERR_PTR(-ESTALE);
 		}
@@ -236,7 +235,9 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb, void *inum_obj)
 	gfs2_glock_dq_uninit(&rgd_gh);
 	gfs2_glock_dq_uninit(&ri_gh);
 
-	inode = gfs2_inode_lookup(sb, inum, fh_obj->imode);
+	inode = gfs2_inode_lookup(sb, DT_UNKNOWN,
+					inum->no_addr,
+					0);
 	if (!inode)
 		goto fail;
 	if (IS_ERR(inode)) {
@@ -250,6 +251,15 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb, void *inum_obj)
 		goto fail;
 	}
 
+	/* Pick up the works we bypass in gfs2_inode_lookup */
+	if (inode->i_state & I_NEW) 
+		gfs2_set_iop(inode);
+
+	if (GFS2_I(inode)->i_no_formal_ino != inum->no_formal_ino) {
+		iput(inode);
+		goto fail;
+	}
+
 	error = -EIO;
 	if (GFS2_I(inode)->i_di.di_flags & GFS2_DIF_SYSTEM) {
 		iput(inode);
diff --git a/fs/gfs2/ops_export.h b/fs/gfs2/ops_export.h
deleted file mode 100644
index f925a95..0000000
--- a/fs/gfs2/ops_export.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
- */
-
-#ifndef __OPS_EXPORT_DOT_H__
-#define __OPS_EXPORT_DOT_H__
-
-#define GFS2_SMALL_FH_SIZE 4
-#define GFS2_LARGE_FH_SIZE 10
-
-extern struct export_operations gfs2_export_ops;
-struct gfs2_fh_obj {
-	struct gfs2_inum_host this;
-	__u32            imode;
-};
-
-#endif /* __OPS_EXPORT_DOT_H__ */
diff --git a/fs/gfs2/ops_file.c b/fs/gfs2/ops_file.c
index 064df88..196d832 100644
--- a/fs/gfs2/ops_file.c
+++ b/fs/gfs2/ops_file.c
@@ -502,7 +502,7 @@ static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl)
 	struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
 	struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
 	struct lm_lockname name =
-		{ .ln_number = ip->i_num.no_addr,
+		{ .ln_number = ip->i_no_addr,
 		  .ln_type = LM_TYPE_PLOCK };
 
 	if (!(fl->fl_flags & FL_POSIX))
@@ -557,7 +557,7 @@ static int do_flock(struct file *file, int cmd, struct file_lock *fl)
 		gfs2_glock_dq_uninit(fl_gh);
 	} else {
 		error = gfs2_glock_get(GFS2_SB(&ip->i_inode),
-				      ip->i_num.no_addr, &gfs2_flock_glops,
+				      ip->i_no_addr, &gfs2_flock_glops,
 				      CREATE, &gl);
 		if (error)
 			goto out;
@@ -635,7 +635,6 @@ const struct file_operations gfs2_file_fops = {
 	.release	= gfs2_close,
 	.fsync		= gfs2_fsync,
 	.lock		= gfs2_lock,
-	.sendfile	= generic_file_sendfile,
 	.flock		= gfs2_flock,
 	.splice_read	= generic_file_splice_read,
 	.splice_write	= generic_file_splice_write,
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 2c5f8e7..cf5aa50 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -27,7 +27,6 @@
 #include "inode.h"
 #include "lm.h"
 #include "mount.h"
-#include "ops_export.h"
 #include "ops_fstype.h"
 #include "ops_super.h"
 #include "recovery.h"
@@ -105,6 +104,7 @@ static void init_vfs(struct super_block *sb, unsigned noatime)
 	sb->s_magic = GFS2_MAGIC;
 	sb->s_op = &gfs2_super_ops;
 	sb->s_export_op = &gfs2_export_ops;
+	sb->s_time_gran = 1;
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
 
 	if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME))
@@ -116,7 +116,6 @@ static void init_vfs(struct super_block *sb, unsigned noatime)
 
 static int init_names(struct gfs2_sbd *sdp, int silent)
 {
-	struct page *page;
 	char *proto, *table;
 	int error = 0;
 
@@ -126,14 +125,9 @@ static int init_names(struct gfs2_sbd *sdp, int silent)
 	/*  Try to autodetect  */
 
 	if (!proto[0] || !table[0]) {
-		struct gfs2_sb *sb;
-		page = gfs2_read_super(sdp->sd_vfs, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
-		if (!page)
-			return -ENOBUFS;
-		sb = kmap(page);
-		gfs2_sb_in(&sdp->sd_sb, sb);
-		kunmap(page);
-		__free_page(page);
+		error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
+		if (error)
+			return error;
 
 		error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
 		if (error)
@@ -151,6 +145,9 @@ static int init_names(struct gfs2_sbd *sdp, int silent)
 	snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto);
 	snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table);
 
+	while ((table = strchr(sdp->sd_table_name, '/')))
+		*table = '_';
+
 out:
 	return error;
 }
@@ -236,17 +233,17 @@ fail:
 	return error;
 }
 
-static struct inode *gfs2_lookup_root(struct super_block *sb,
-				      struct gfs2_inum_host *inum)
+static inline struct inode *gfs2_lookup_root(struct super_block *sb,
+					     u64 no_addr)
 {
-	return gfs2_inode_lookup(sb, inum, DT_DIR);
+	return gfs2_inode_lookup(sb, DT_DIR, no_addr, 0);
 }
 
 static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
 {
 	struct super_block *sb = sdp->sd_vfs;
 	struct gfs2_holder sb_gh;
-	struct gfs2_inum_host *inum;
+	u64 no_addr;
 	struct inode *inode;
 	int error = 0;
 
@@ -289,10 +286,10 @@ static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
 	sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
 
 	/* Get the root inode */
-	inum = &sdp->sd_sb.sb_root_dir;
+	no_addr = sdp->sd_sb.sb_root_dir.no_addr;
 	if (sb->s_type == &gfs2meta_fs_type)
-		inum = &sdp->sd_sb.sb_master_dir;
-	inode = gfs2_lookup_root(sb, inum);
+		no_addr = sdp->sd_sb.sb_master_dir.no_addr;
+	inode = gfs2_lookup_root(sb, no_addr);
 	if (IS_ERR(inode)) {
 		error = PTR_ERR(inode);
 		fs_err(sdp, "can't read in root inode: %d\n", error);
@@ -449,7 +446,7 @@ static int init_inodes(struct gfs2_sbd *sdp, int undo)
 	if (undo)
 		goto fail_qinode;
 
-	inode = gfs2_lookup_root(sdp->sd_vfs, &sdp->sd_sb.sb_master_dir);
+	inode = gfs2_lookup_root(sdp->sd_vfs, sdp->sd_sb.sb_master_dir.no_addr);
 	if (IS_ERR(inode)) {
 		error = PTR_ERR(inode);
 		fs_err(sdp, "can't read in master directory: %d\n", error);
diff --git a/fs/gfs2/ops_fstype.h b/fs/gfs2/ops_fstype.h
index 7cc2c29..407029b 100644
--- a/fs/gfs2/ops_fstype.h
+++ b/fs/gfs2/ops_fstype.h
@@ -14,5 +14,6 @@
 
 extern struct file_system_type gfs2_fs_type;
 extern struct file_system_type gfs2meta_fs_type;
+extern struct export_operations gfs2_export_ops;
 
 #endif /* __OPS_FSTYPE_DOT_H__ */
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index d85f6e0..911c115 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -157,7 +157,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
 	if (error)
 		goto out_gunlock;
 
-	error = gfs2_dir_search(dir, &dentry->d_name, NULL, NULL);
+	error = gfs2_dir_check(dir, &dentry->d_name, NULL);
 	switch (error) {
 	case -ENOENT:
 		break;
@@ -206,7 +206,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
 			goto out_gunlock_q;
 
 		error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
-					 al->al_rgd->rd_ri.ri_length +
+					 al->al_rgd->rd_length +
 					 2 * RES_DINODE + RES_STATFS +
 					 RES_QUOTA, 0);
 		if (error)
@@ -217,8 +217,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
 			goto out_ipres;
 	}
 
-	error = gfs2_dir_add(dir, &dentry->d_name, &ip->i_num,
-			     IF2DT(inode->i_mode));
+	error = gfs2_dir_add(dir, &dentry->d_name, ip, IF2DT(inode->i_mode));
 	if (error)
 		goto out_end_trans;
 
@@ -275,7 +274,7 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
 	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
 	gfs2_holder_init(ip->i_gl,  LM_ST_EXCLUSIVE, 0, ghs + 1);
 
-	rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr);
+	rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
 	gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
 
 
@@ -420,7 +419,7 @@ static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 		dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
 		gfs2_qstr2dirent(&str, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
 
-		gfs2_inum_out(&dip->i_num, &dent->de_inum);
+		gfs2_inum_out(dip, dent);
 		dent->de_type = cpu_to_be16(DT_DIR);
 
 		gfs2_dinode_out(ip, di);
@@ -472,7 +471,7 @@ static int gfs2_rmdir(struct inode *dir, struct dentry *dentry)
 	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
 	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
 
-	rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr);
+	rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
 	gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
 
 	error = gfs2_glock_nq_m(3, ghs);
@@ -614,7 +613,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
 		 * this is the case of the target file already existing
 		 * so we unlink before doing the rename
 		 */
-		nrgd = gfs2_blk2rgrpd(sdp, nip->i_num.no_addr);
+		nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr);
 		if (nrgd)
 			gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++);
 	}
@@ -653,7 +652,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
 		if (error)
 			goto out_gunlock;
 
-		error = gfs2_dir_search(ndir, &ndentry->d_name, NULL, NULL);
+		error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
 		switch (error) {
 		case -ENOENT:
 			error = 0;
@@ -712,7 +711,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
 			goto out_gunlock_q;
 
 		error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
-					 al->al_rgd->rd_ri.ri_length +
+					 al->al_rgd->rd_length +
 					 4 * RES_DINODE + 4 * RES_LEAF +
 					 RES_STATFS + RES_QUOTA + 4, 0);
 		if (error)
@@ -750,7 +749,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
 		if (error)
 			goto out_end_trans;
 
-		error = gfs2_dir_mvino(ip, &name, &ndip->i_num, DT_DIR);
+		error = gfs2_dir_mvino(ip, &name, ndip, DT_DIR);
 		if (error)
 			goto out_end_trans;
 	} else {
@@ -758,7 +757,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
 		error = gfs2_meta_inode_buffer(ip, &dibh);
 		if (error)
 			goto out_end_trans;
-		ip->i_inode.i_ctime = CURRENT_TIME_SEC;
+		ip->i_inode.i_ctime = CURRENT_TIME;
 		gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 		gfs2_dinode_out(ip, dibh->b_data);
 		brelse(dibh);
@@ -768,8 +767,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
 	if (error)
 		goto out_end_trans;
 
-	error = gfs2_dir_add(ndir, &ndentry->d_name, &ip->i_num,
-			     IF2DT(ip->i_inode.i_mode));
+	error = gfs2_dir_add(ndir, &ndentry->d_name, ip, IF2DT(ip->i_inode.i_mode));
 	if (error)
 		goto out_end_trans;
 
@@ -905,8 +903,8 @@ static int setattr_size(struct inode *inode, struct iattr *attr)
 	}
 
 	error = gfs2_truncatei(ip, attr->ia_size);
-	if (error)
-		return error;
+	if (error && (inode->i_size != ip->i_di.di_size))
+		i_size_write(inode, ip->i_di.di_size);
 
 	return error;
 }
diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c
index 485ce3d..603d940 100644
--- a/fs/gfs2/ops_super.c
+++ b/fs/gfs2/ops_super.c
@@ -326,8 +326,10 @@ static void gfs2_clear_inode(struct inode *inode)
 		gfs2_glock_schedule_for_reclaim(ip->i_gl);
 		gfs2_glock_put(ip->i_gl);
 		ip->i_gl = NULL;
-		if (ip->i_iopen_gh.gh_gl)
+		if (ip->i_iopen_gh.gh_gl) {
+			ip->i_iopen_gh.gh_gl->gl_object = NULL;
 			gfs2_glock_dq_uninit(&ip->i_iopen_gh);
+		}
 	}
 }
 
@@ -422,13 +424,13 @@ static void gfs2_delete_inode(struct inode *inode)
 	if (!inode->i_private)
 		goto out;
 
-	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB, &gh);
+	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
 	if (unlikely(error)) {
 		gfs2_glock_dq_uninit(&ip->i_iopen_gh);
 		goto out;
 	}
 
-	gfs2_glock_dq(&ip->i_iopen_gh);
+	gfs2_glock_dq_wait(&ip->i_iopen_gh);
 	gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh);
 	error = gfs2_glock_nq(&ip->i_iopen_gh);
 	if (error)
diff --git a/fs/gfs2/ops_vm.c b/fs/gfs2/ops_vm.c
index aa0dbd2..404b7cc 100644
--- a/fs/gfs2/ops_vm.c
+++ b/fs/gfs2/ops_vm.c
@@ -66,7 +66,7 @@ static int alloc_page_backing(struct gfs2_inode *ip, struct page *page)
 	if (error)
 		goto out_gunlock_q;
 
-	error = gfs2_trans_begin(sdp, al->al_rgd->rd_ri.ri_length +
+	error = gfs2_trans_begin(sdp, al->al_rgd->rd_length +
 				 ind_blocks + RES_DINODE +
 				 RES_STATFS + RES_QUOTA, 0);
 	if (error)
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index c186857..6e546ee 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -66,6 +66,18 @@
 #define QUOTA_USER 1
 #define QUOTA_GROUP 0
 
+struct gfs2_quota_host {
+	u64 qu_limit;
+	u64 qu_warn;
+	s64 qu_value;
+};
+
+struct gfs2_quota_change_host {
+	u64 qc_change;
+	u32 qc_flags; /* GFS2_QCF_... */
+	u32 qc_id;
+};
+
 static u64 qd2offset(struct gfs2_quota_data *qd)
 {
 	u64 offset;
@@ -561,6 +573,25 @@ static void do_qc(struct gfs2_quota_data *qd, s64 change)
 	mutex_unlock(&sdp->sd_quota_mutex);
 }
 
+static void gfs2_quota_in(struct gfs2_quota_host *qu, const void *buf)
+{
+	const struct gfs2_quota *str = buf;
+
+	qu->qu_limit = be64_to_cpu(str->qu_limit);
+	qu->qu_warn = be64_to_cpu(str->qu_warn);
+	qu->qu_value = be64_to_cpu(str->qu_value);
+}
+
+static void gfs2_quota_out(const struct gfs2_quota_host *qu, void *buf)
+{
+	struct gfs2_quota *str = buf;
+
+	str->qu_limit = cpu_to_be64(qu->qu_limit);
+	str->qu_warn = cpu_to_be64(qu->qu_warn);
+	str->qu_value = cpu_to_be64(qu->qu_value);
+	memset(&str->qu_reserved, 0, sizeof(str->qu_reserved));
+}
+
 /**
  * gfs2_adjust_quota
  *
@@ -573,12 +604,13 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
 	struct inode *inode = &ip->i_inode;
 	struct address_space *mapping = inode->i_mapping;
 	unsigned long index = loc >> PAGE_CACHE_SHIFT;
-	unsigned offset = loc & (PAGE_CACHE_SHIFT - 1);
+	unsigned offset = loc & (PAGE_CACHE_SIZE - 1);
 	unsigned blocksize, iblock, pos;
 	struct buffer_head *bh;
 	struct page *page;
 	void *kaddr;
-	__be64 *ptr;
+	char *ptr;
+	struct gfs2_quota_host qp;
 	s64 value;
 	int err = -EIO;
 
@@ -620,13 +652,17 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
 
 	kaddr = kmap_atomic(page, KM_USER0);
 	ptr = kaddr + offset;
-	value = (s64)be64_to_cpu(*ptr) + change;
-	*ptr = cpu_to_be64(value);
+	gfs2_quota_in(&qp, ptr);
+	qp.qu_value += change;
+	value = qp.qu_value;
+	gfs2_quota_out(&qp, ptr);
 	flush_dcache_page(page);
 	kunmap_atomic(kaddr, KM_USER0);
 	err = 0;
 	qd->qd_qb.qb_magic = cpu_to_be32(GFS2_MAGIC);
 	qd->qd_qb.qb_value = cpu_to_be64(value);
+	((struct gfs2_quota_lvb*)(qd->qd_gl->gl_lvb))->qb_magic = cpu_to_be32(GFS2_MAGIC);
+	((struct gfs2_quota_lvb*)(qd->qd_gl->gl_lvb))->qb_value = cpu_to_be64(value);
 unlock:
 	unlock_page(page);
 	page_cache_release(page);
@@ -689,7 +725,7 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
 			goto out_alloc;
 
 		error = gfs2_trans_begin(sdp,
-					 al->al_rgd->rd_ri.ri_length +
+					 al->al_rgd->rd_length +
 					 num_qd * data_blocks +
 					 nalloc * ind_blocks +
 					 RES_DINODE + num_qd +
@@ -709,7 +745,7 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
 		offset = qd2offset(qd);
 		error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync,
 					  (struct gfs2_quota_data *)
-					  qd->qd_gl->gl_lvb);
+					  qd);
 		if (error)
 			goto out_end_trans;
 
@@ -1050,6 +1086,15 @@ int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id)
 	return error;
 }
 
+static void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf)
+{
+	const struct gfs2_quota_change *str = buf;
+
+	qc->qc_change = be64_to_cpu(str->qc_change);
+	qc->qc_flags = be32_to_cpu(str->qc_flags);
+	qc->qc_id = be32_to_cpu(str->qc_id);
+}
+
 int gfs2_quota_init(struct gfs2_sbd *sdp)
 {
 	struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
diff --git a/fs/gfs2/recovery.c b/fs/gfs2/recovery.c
index 8bc182c..5ada38c 100644
--- a/fs/gfs2/recovery.c
+++ b/fs/gfs2/recovery.c
@@ -116,6 +116,22 @@ void gfs2_revoke_clean(struct gfs2_sbd *sdp)
 	}
 }
 
+static int gfs2_log_header_in(struct gfs2_log_header_host *lh, const void *buf)
+{
+	const struct gfs2_log_header *str = buf;
+
+	if (str->lh_header.mh_magic != cpu_to_be32(GFS2_MAGIC) ||
+	    str->lh_header.mh_type != cpu_to_be32(GFS2_METATYPE_LH))
+		return 1;
+
+	lh->lh_sequence = be64_to_cpu(str->lh_sequence);
+	lh->lh_flags = be32_to_cpu(str->lh_flags);
+	lh->lh_tail = be32_to_cpu(str->lh_tail);
+	lh->lh_blkno = be32_to_cpu(str->lh_blkno);
+	lh->lh_hash = be32_to_cpu(str->lh_hash);
+	return 0;
+}
+
 /**
  * get_log_header - read the log header for a given segment
  * @jd: the journal
@@ -147,12 +163,10 @@ static int get_log_header(struct gfs2_jdesc *jd, unsigned int blk,
 					     sizeof(u32));
 	hash = crc32_le(hash, (unsigned char const *)&nothing, sizeof(nothing));
 	hash ^= (u32)~0;
-	gfs2_log_header_in(&lh, bh->b_data);
+	error = gfs2_log_header_in(&lh, bh->b_data);
 	brelse(bh);
 
-	if (lh.lh_header.mh_magic != GFS2_MAGIC ||
-	    lh.lh_header.mh_type != GFS2_METATYPE_LH ||
-	    lh.lh_blkno != blk || lh.lh_hash != hash)
+	if (error || lh.lh_blkno != blk || lh.lh_hash != hash)
 		return 1;
 
 	*head = lh;
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 1727f50..e4e0406 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
+ * Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
  *
  * This copyrighted material is made available to anyone wishing to use,
  * modify, copy, or redistribute it subject to the terms and conditions
@@ -28,6 +28,7 @@
 #include "ops_file.h"
 #include "util.h"
 #include "log.h"
+#include "inode.h"
 
 #define BFITNOENT ((u32)~0)
 
@@ -50,6 +51,9 @@ static const char valid_change[16] = {
 	        1, 0, 0, 0
 };
 
+static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal,
+                        unsigned char old_state, unsigned char new_state);
+
 /**
  * gfs2_setbit - Set a bit in the bitmaps
  * @buffer: the buffer that holds the bitmaps
@@ -204,7 +208,7 @@ void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd)
 {
 	struct gfs2_sbd *sdp = rgd->rd_sbd;
 	struct gfs2_bitmap *bi = NULL;
-	u32 length = rgd->rd_ri.ri_length;
+	u32 length = rgd->rd_length;
 	u32 count[4], tmp;
 	int buf, x;
 
@@ -227,7 +231,7 @@ void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd)
 		return;
 	}
 
-	tmp = rgd->rd_ri.ri_data -
+	tmp = rgd->rd_data -
 		rgd->rd_rg.rg_free -
 		rgd->rd_rg.rg_dinodes;
 	if (count[1] + count[2] != tmp) {
@@ -253,10 +257,10 @@ void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd)
 
 }
 
-static inline int rgrp_contains_block(struct gfs2_rindex_host *ri, u64 block)
+static inline int rgrp_contains_block(struct gfs2_rgrpd *rgd, u64 block)
 {
-	u64 first = ri->ri_data0;
-	u64 last = first + ri->ri_data;
+	u64 first = rgd->rd_data0;
+	u64 last = first + rgd->rd_data;
 	return first <= block && block < last;
 }
 
@@ -275,7 +279,7 @@ struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk)
 	spin_lock(&sdp->sd_rindex_spin);
 
 	list_for_each_entry(rgd, &sdp->sd_rindex_mru_list, rd_list_mru) {
-		if (rgrp_contains_block(&rgd->rd_ri, blk)) {
+		if (rgrp_contains_block(rgd, blk)) {
 			list_move(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list);
 			spin_unlock(&sdp->sd_rindex_spin);
 			return rgd;
@@ -354,6 +358,15 @@ void gfs2_clear_rgrpd(struct gfs2_sbd *sdp)
 	mutex_unlock(&sdp->sd_rindex_mutex);
 }
 
+static void gfs2_rindex_print(const struct gfs2_rgrpd *rgd)
+{
+	printk(KERN_INFO "  ri_addr = %llu\n", (unsigned long long)rgd->rd_addr);
+	printk(KERN_INFO "  ri_length = %u\n", rgd->rd_length);
+	printk(KERN_INFO "  ri_data0 = %llu\n", (unsigned long long)rgd->rd_data0);
+	printk(KERN_INFO "  ri_data = %u\n", rgd->rd_data);
+	printk(KERN_INFO "  ri_bitbytes = %u\n", rgd->rd_bitbytes);
+}
+
 /**
  * gfs2_compute_bitstructs - Compute the bitmap sizes
  * @rgd: The resource group descriptor
@@ -367,7 +380,7 @@ static int compute_bitstructs(struct gfs2_rgrpd *rgd)
 {
 	struct gfs2_sbd *sdp = rgd->rd_sbd;
 	struct gfs2_bitmap *bi;
-	u32 length = rgd->rd_ri.ri_length; /* # blocks in hdr & bitmap */
+	u32 length = rgd->rd_length; /* # blocks in hdr & bitmap */
 	u32 bytes_left, bytes;
 	int x;
 
@@ -378,7 +391,7 @@ static int compute_bitstructs(struct gfs2_rgrpd *rgd)
 	if (!rgd->rd_bits)
 		return -ENOMEM;
 
-	bytes_left = rgd->rd_ri.ri_bitbytes;
+	bytes_left = rgd->rd_bitbytes;
 
 	for (x = 0; x < length; x++) {
 		bi = rgd->rd_bits + x;
@@ -399,14 +412,14 @@ static int compute_bitstructs(struct gfs2_rgrpd *rgd)
 		} else if (x + 1 == length) {
 			bytes = bytes_left;
 			bi->bi_offset = sizeof(struct gfs2_meta_header);
-			bi->bi_start = rgd->rd_ri.ri_bitbytes - bytes_left;
+			bi->bi_start = rgd->rd_bitbytes - bytes_left;
 			bi->bi_len = bytes;
 		/* other blocks */
 		} else {
 			bytes = sdp->sd_sb.sb_bsize -
 				sizeof(struct gfs2_meta_header);
 			bi->bi_offset = sizeof(struct gfs2_meta_header);
-			bi->bi_start = rgd->rd_ri.ri_bitbytes - bytes_left;
+			bi->bi_start = rgd->rd_bitbytes - bytes_left;
 			bi->bi_len = bytes;
 		}
 
@@ -418,9 +431,9 @@ static int compute_bitstructs(struct gfs2_rgrpd *rgd)
 		return -EIO;
 	}
 	bi = rgd->rd_bits + (length - 1);
-	if ((bi->bi_start + bi->bi_len) * GFS2_NBBY != rgd->rd_ri.ri_data) {
+	if ((bi->bi_start + bi->bi_len) * GFS2_NBBY != rgd->rd_data) {
 		if (gfs2_consist_rgrpd(rgd)) {
-			gfs2_rindex_print(&rgd->rd_ri);
+			gfs2_rindex_print(rgd);
 			fs_err(sdp, "start=%u len=%u offset=%u\n",
 			       bi->bi_start, bi->bi_len, bi->bi_offset);
 		}
@@ -431,9 +444,104 @@ static int compute_bitstructs(struct gfs2_rgrpd *rgd)
 }
 
 /**
- * gfs2_ri_update - Pull in a new resource index from the disk
+ * gfs2_ri_total - Total up the file system space, according to the rindex.
+ *
+ */
+u64 gfs2_ri_total(struct gfs2_sbd *sdp)
+{
+	u64 total_data = 0;	
+	struct inode *inode = sdp->sd_rindex;
+	struct gfs2_inode *ip = GFS2_I(inode);
+	char buf[sizeof(struct gfs2_rindex)];
+	struct file_ra_state ra_state;
+	int error, rgrps;
+
+	mutex_lock(&sdp->sd_rindex_mutex);
+	file_ra_state_init(&ra_state, inode->i_mapping);
+	for (rgrps = 0;; rgrps++) {
+		loff_t pos = rgrps * sizeof(struct gfs2_rindex);
+
+		if (pos + sizeof(struct gfs2_rindex) >= ip->i_di.di_size)
+			break;
+		error = gfs2_internal_read(ip, &ra_state, buf, &pos,
+					   sizeof(struct gfs2_rindex));
+		if (error != sizeof(struct gfs2_rindex))
+			break;
+		total_data += be32_to_cpu(((struct gfs2_rindex *)buf)->ri_data);
+	}
+	mutex_unlock(&sdp->sd_rindex_mutex);
+	return total_data;
+}
+
+static void gfs2_rindex_in(struct gfs2_rgrpd *rgd, const void *buf)
+{
+	const struct gfs2_rindex *str = buf;
+
+	rgd->rd_addr = be64_to_cpu(str->ri_addr);
+	rgd->rd_length = be32_to_cpu(str->ri_length);
+	rgd->rd_data0 = be64_to_cpu(str->ri_data0);
+	rgd->rd_data = be32_to_cpu(str->ri_data);
+	rgd->rd_bitbytes = be32_to_cpu(str->ri_bitbytes);
+}
+
+/**
+ * read_rindex_entry - Pull in a new resource index entry from the disk
  * @gl: The glock covering the rindex inode
  *
+ * Returns: 0 on success, error code otherwise
+ */
+
+static int read_rindex_entry(struct gfs2_inode *ip,
+			     struct file_ra_state *ra_state)
+{
+	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+	loff_t pos = sdp->sd_rgrps * sizeof(struct gfs2_rindex);
+	char buf[sizeof(struct gfs2_rindex)];
+	int error;
+	struct gfs2_rgrpd *rgd;
+
+	error = gfs2_internal_read(ip, ra_state, buf, &pos,
+				   sizeof(struct gfs2_rindex));
+	if (!error)
+		return 0;
+	if (error != sizeof(struct gfs2_rindex)) {
+		if (error > 0)
+			error = -EIO;
+		return error;
+	}
+
+	rgd = kzalloc(sizeof(struct gfs2_rgrpd), GFP_NOFS);
+	error = -ENOMEM;
+	if (!rgd)
+		return error;
+
+	mutex_init(&rgd->rd_mutex);
+	lops_init_le(&rgd->rd_le, &gfs2_rg_lops);
+	rgd->rd_sbd = sdp;
+
+	list_add_tail(&rgd->rd_list, &sdp->sd_rindex_list);
+	list_add_tail(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list);
+
+	gfs2_rindex_in(rgd, buf);
+	error = compute_bitstructs(rgd);
+	if (error)
+		return error;
+
+	error = gfs2_glock_get(sdp, rgd->rd_addr,
+			       &gfs2_rgrp_glops, CREATE, &rgd->rd_gl);
+	if (error)
+		return error;
+
+	rgd->rd_gl->gl_object = rgd;
+	rgd->rd_rg_vn = rgd->rd_gl->gl_vn - 1;
+	rgd->rd_flags |= GFS2_RDF_CHECK;
+	return error;
+}
+
+/**
+ * gfs2_ri_update - Pull in a new resource index from the disk
+ * @ip: pointer to the rindex inode
+ *
  * Returns: 0 on successful update, error code otherwise
  */
 
@@ -441,13 +549,11 @@ static int gfs2_ri_update(struct gfs2_inode *ip)
 {
 	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 	struct inode *inode = &ip->i_inode;
-	struct gfs2_rgrpd *rgd;
-	char buf[sizeof(struct gfs2_rindex)];
 	struct file_ra_state ra_state;
-	u64 junk = ip->i_di.di_size;
+	u64 rgrp_count = ip->i_di.di_size;
 	int error;
 
-	if (do_div(junk, sizeof(struct gfs2_rindex))) {
+	if (do_div(rgrp_count, sizeof(struct gfs2_rindex))) {
 		gfs2_consist_inode(ip);
 		return -EIO;
 	}
@@ -455,50 +561,50 @@ static int gfs2_ri_update(struct gfs2_inode *ip)
 	clear_rgrpdi(sdp);
 
 	file_ra_state_init(&ra_state, inode->i_mapping);
-	for (sdp->sd_rgrps = 0;; sdp->sd_rgrps++) {
-		loff_t pos = sdp->sd_rgrps * sizeof(struct gfs2_rindex);
-		error = gfs2_internal_read(ip, &ra_state, buf, &pos,
-					    sizeof(struct gfs2_rindex));
-		if (!error)
-			break;
-		if (error != sizeof(struct gfs2_rindex)) {
-			if (error > 0)
-				error = -EIO;
-			goto fail;
+	for (sdp->sd_rgrps = 0; sdp->sd_rgrps < rgrp_count; sdp->sd_rgrps++) {
+		error = read_rindex_entry(ip, &ra_state);
+		if (error) {
+			clear_rgrpdi(sdp);
+			return error;
 		}
+	}
 
-		rgd = kzalloc(sizeof(struct gfs2_rgrpd), GFP_NOFS);
-		error = -ENOMEM;
-		if (!rgd)
-			goto fail;
-
-		mutex_init(&rgd->rd_mutex);
-		lops_init_le(&rgd->rd_le, &gfs2_rg_lops);
-		rgd->rd_sbd = sdp;
-
-		list_add_tail(&rgd->rd_list, &sdp->sd_rindex_list);
-		list_add_tail(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list);
-
-		gfs2_rindex_in(&rgd->rd_ri, buf);
-		error = compute_bitstructs(rgd);
-		if (error)
-			goto fail;
+	sdp->sd_rindex_vn = ip->i_gl->gl_vn;
+	return 0;
+}
 
-		error = gfs2_glock_get(sdp, rgd->rd_ri.ri_addr,
-				       &gfs2_rgrp_glops, CREATE, &rgd->rd_gl);
-		if (error)
-			goto fail;
+/**
+ * gfs2_ri_update_special - Pull in a new resource index from the disk
+ *
+ * This is a special version that's safe to call from gfs2_inplace_reserve_i.
+ * In this case we know that we don't have any resource groups in memory yet.
+ *
+ * @ip: pointer to the rindex inode
+ *
+ * Returns: 0 on successful update, error code otherwise
+ */
+static int gfs2_ri_update_special(struct gfs2_inode *ip)
+{
+	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+	struct inode *inode = &ip->i_inode;
+	struct file_ra_state ra_state;
+	int error;
 
-		rgd->rd_gl->gl_object = rgd;
-		rgd->rd_rg_vn = rgd->rd_gl->gl_vn - 1;
+	file_ra_state_init(&ra_state, inode->i_mapping);
+	for (sdp->sd_rgrps = 0;; sdp->sd_rgrps++) {
+		/* Ignore partials */
+		if ((sdp->sd_rgrps + 1) * sizeof(struct gfs2_rindex) >
+		    ip->i_di.di_size)
+			break;
+		error = read_rindex_entry(ip, &ra_state);
+		if (error) {
+			clear_rgrpdi(sdp);
+			return error;
+		}
 	}
 
 	sdp->sd_rindex_vn = ip->i_gl->gl_vn;
 	return 0;
-
-fail:
-	clear_rgrpdi(sdp);
-	return error;
 }
 
 /**
@@ -543,6 +649,28 @@ int gfs2_rindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ri_gh)
 	return error;
 }
 
+static void gfs2_rgrp_in(struct gfs2_rgrp_host *rg, const void *buf)
+{
+	const struct gfs2_rgrp *str = buf;
+
+	rg->rg_flags = be32_to_cpu(str->rg_flags);
+	rg->rg_free = be32_to_cpu(str->rg_free);
+	rg->rg_dinodes = be32_to_cpu(str->rg_dinodes);
+	rg->rg_igeneration = be64_to_cpu(str->rg_igeneration);
+}
+
+static void gfs2_rgrp_out(const struct gfs2_rgrp_host *rg, void *buf)
+{
+	struct gfs2_rgrp *str = buf;
+
+	str->rg_flags = cpu_to_be32(rg->rg_flags);
+	str->rg_free = cpu_to_be32(rg->rg_free);
+	str->rg_dinodes = cpu_to_be32(rg->rg_dinodes);
+	str->__pad = cpu_to_be32(0);
+	str->rg_igeneration = cpu_to_be64(rg->rg_igeneration);
+	memset(&str->rg_reserved, 0, sizeof(str->rg_reserved));
+}
+
 /**
  * gfs2_rgrp_bh_get - Read in a RG's header and bitmaps
  * @rgd: the struct gfs2_rgrpd describing the RG to read in
@@ -557,7 +685,7 @@ int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd)
 {
 	struct gfs2_sbd *sdp = rgd->rd_sbd;
 	struct gfs2_glock *gl = rgd->rd_gl;
-	unsigned int length = rgd->rd_ri.ri_length;
+	unsigned int length = rgd->rd_length;
 	struct gfs2_bitmap *bi;
 	unsigned int x, y;
 	int error;
@@ -575,7 +703,7 @@ int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd)
 
 	for (x = 0; x < length; x++) {
 		bi = rgd->rd_bits + x;
-		error = gfs2_meta_read(gl, rgd->rd_ri.ri_addr + x, 0, &bi->bi_bh);
+		error = gfs2_meta_read(gl, rgd->rd_addr + x, 0, &bi->bi_bh);
 		if (error)
 			goto fail;
 	}
@@ -637,7 +765,7 @@ void gfs2_rgrp_bh_hold(struct gfs2_rgrpd *rgd)
 void gfs2_rgrp_bh_put(struct gfs2_rgrpd *rgd)
 {
 	struct gfs2_sbd *sdp = rgd->rd_sbd;
-	int x, length = rgd->rd_ri.ri_length;
+	int x, length = rgd->rd_length;
 
 	spin_lock(&sdp->sd_rindex_spin);
 	gfs2_assert_warn(rgd->rd_sbd, rgd->rd_bh_count);
@@ -660,7 +788,7 @@ void gfs2_rgrp_bh_put(struct gfs2_rgrpd *rgd)
 void gfs2_rgrp_repolish_clones(struct gfs2_rgrpd *rgd)
 {
 	struct gfs2_sbd *sdp = rgd->rd_sbd;
-	unsigned int length = rgd->rd_ri.ri_length;
+	unsigned int length = rgd->rd_length;
 	unsigned int x;
 
 	for (x = 0; x < length; x++) {
@@ -722,6 +850,38 @@ static int try_rgrp_fit(struct gfs2_rgrpd *rgd, struct gfs2_alloc *al)
 }
 
 /**
+ * try_rgrp_unlink - Look for any unlinked, allocated, but unused inodes
+ * @rgd: The rgrp
+ *
+ * Returns: The inode, if one has been found
+ */
+
+static struct inode *try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked)
+{
+	struct inode *inode;
+	u32 goal = 0;
+	u64 no_addr;
+
+	for(;;) {
+		goal = rgblk_search(rgd, goal, GFS2_BLKST_UNLINKED,
+				    GFS2_BLKST_UNLINKED);
+		if (goal == 0)
+			return 0;
+		no_addr = goal + rgd->rd_data0;
+		if (no_addr <= *last_unlinked)
+			continue;
+		*last_unlinked = no_addr;
+		inode = gfs2_inode_lookup(rgd->rd_sbd->sd_vfs, DT_UNKNOWN,
+					no_addr, -1);
+		if (!IS_ERR(inode))
+			return inode;
+	}
+
+	rgd->rd_flags &= ~GFS2_RDF_CHECK;
+	return NULL;
+}
+
+/**
  * recent_rgrp_first - get first RG from "recent" list
  * @sdp: The GFS2 superblock
  * @rglast: address of the rgrp used last
@@ -743,7 +903,7 @@ static struct gfs2_rgrpd *recent_rgrp_first(struct gfs2_sbd *sdp,
 		goto first;
 
 	list_for_each_entry(rgd, &sdp->sd_rindex_recent_list, rd_recent) {
-		if (rgd->rd_ri.ri_addr == rglast)
+		if (rgd->rd_addr == rglast)
 			goto out;
 	}
 
@@ -882,8 +1042,9 @@ static void forward_rgrp_set(struct gfs2_sbd *sdp, struct gfs2_rgrpd *rgd)
  * Returns: errno
  */
 
-static int get_local_rgrp(struct gfs2_inode *ip)
+static struct inode *get_local_rgrp(struct gfs2_inode *ip, u64 *last_unlinked)
 {
+	struct inode *inode = NULL;
 	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 	struct gfs2_rgrpd *rgd, *begin = NULL;
 	struct gfs2_alloc *al = &ip->i_alloc;
@@ -903,7 +1064,11 @@ static int get_local_rgrp(struct gfs2_inode *ip)
 		case 0:
 			if (try_rgrp_fit(rgd, al))
 				goto out;
+			if (rgd->rd_flags & GFS2_RDF_CHECK)
+				inode = try_rgrp_unlink(rgd, last_unlinked);
 			gfs2_glock_dq_uninit(&al->al_rgd_gh);
+			if (inode)
+				return inode;
 			rgd = recent_rgrp_next(rgd, 1);
 			break;
 
@@ -912,7 +1077,7 @@ static int get_local_rgrp(struct gfs2_inode *ip)
 			break;
 
 		default:
-			return error;
+			return ERR_PTR(error);
 		}
 	}
 
@@ -927,7 +1092,11 @@ static int get_local_rgrp(struct gfs2_inode *ip)
 		case 0:
 			if (try_rgrp_fit(rgd, al))
 				goto out;
+			if (rgd->rd_flags & GFS2_RDF_CHECK)
+				inode = try_rgrp_unlink(rgd, last_unlinked);
 			gfs2_glock_dq_uninit(&al->al_rgd_gh);
+			if (inode)
+				return inode;
 			break;
 
 		case GLR_TRYFAILED:
@@ -935,7 +1104,7 @@ static int get_local_rgrp(struct gfs2_inode *ip)
 			break;
 
 		default:
-			return error;
+			return ERR_PTR(error);
 		}
 
 		rgd = gfs2_rgrpd_get_next(rgd);
@@ -944,7 +1113,7 @@ static int get_local_rgrp(struct gfs2_inode *ip)
 
 		if (rgd == begin) {
 			if (++loops >= 3)
-				return -ENOSPC;
+				return ERR_PTR(-ENOSPC);
 			if (!skipped)
 				loops++;
 			flags = 0;
@@ -954,7 +1123,7 @@ static int get_local_rgrp(struct gfs2_inode *ip)
 	}
 
 out:
-	ip->i_last_rg_alloc = rgd->rd_ri.ri_addr;
+	ip->i_last_rg_alloc = rgd->rd_addr;
 
 	if (begin) {
 		recent_rgrp_add(rgd);
@@ -964,7 +1133,7 @@ out:
 		forward_rgrp_set(sdp, rgd);
 	}
 
-	return 0;
+	return NULL;
 }
 
 /**
@@ -978,19 +1147,33 @@ int gfs2_inplace_reserve_i(struct gfs2_inode *ip, char *file, unsigned int line)
 {
 	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 	struct gfs2_alloc *al = &ip->i_alloc;
-	int error;
+	struct inode *inode;
+	int error = 0;
+	u64 last_unlinked = 0;
 
 	if (gfs2_assert_warn(sdp, al->al_requested))
 		return -EINVAL;
 
-	error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
+try_again:
+	/* We need to hold the rindex unless the inode we're using is
+	   the rindex itself, in which case it's already held. */
+	if (ip != GFS2_I(sdp->sd_rindex))
+		error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
+	else if (!sdp->sd_rgrps) /* We may not have the rindex read in, so: */
+		error = gfs2_ri_update_special(ip);
+
 	if (error)
 		return error;
 
-	error = get_local_rgrp(ip);
-	if (error) {
-		gfs2_glock_dq_uninit(&al->al_ri_gh);
-		return error;
+	inode = get_local_rgrp(ip, &last_unlinked);
+	if (inode) {
+		if (ip != GFS2_I(sdp->sd_rindex))
+			gfs2_glock_dq_uninit(&al->al_ri_gh);
+		if (IS_ERR(inode))
+			return PTR_ERR(inode);
+		iput(inode);
+		gfs2_log_flush(sdp, NULL);
+		goto try_again;
 	}
 
 	al->al_file = file;
@@ -1019,7 +1202,8 @@ void gfs2_inplace_release(struct gfs2_inode *ip)
 
 	al->al_rgd = NULL;
 	gfs2_glock_dq_uninit(&al->al_rgd_gh);
-	gfs2_glock_dq_uninit(&al->al_ri_gh);
+	if (ip != GFS2_I(sdp->sd_rindex))
+		gfs2_glock_dq_uninit(&al->al_ri_gh);
 }
 
 /**
@@ -1037,8 +1221,8 @@ unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block)
 	unsigned int buf;
 	unsigned char type;
 
-	length = rgd->rd_ri.ri_length;
-	rgrp_block = block - rgd->rd_ri.ri_data0;
+	length = rgd->rd_length;
+	rgrp_block = block - rgd->rd_data0;
 
 	for (buf = 0; buf < length; buf++) {
 		bi = rgd->rd_bits + buf;
@@ -1077,10 +1261,10 @@ unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block)
  */
 
 static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal,
-			     unsigned char old_state, unsigned char new_state)
+			unsigned char old_state, unsigned char new_state)
 {
 	struct gfs2_bitmap *bi = NULL;
-	u32 length = rgd->rd_ri.ri_length;
+	u32 length = rgd->rd_length;
 	u32 blk = 0;
 	unsigned int buf, x;
 
@@ -1118,17 +1302,18 @@ static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal,
 		goal = 0;
 	}
 
-	if (gfs2_assert_withdraw(rgd->rd_sbd, x <= length))
-		blk = 0;
+	if (old_state != new_state) {
+		gfs2_assert_withdraw(rgd->rd_sbd, blk != BFITNOENT);
 
-	gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
-	gfs2_setbit(rgd, bi->bi_bh->b_data + bi->bi_offset,
-		    bi->bi_len, blk, new_state);
-	if (bi->bi_clone)
-		gfs2_setbit(rgd, bi->bi_clone + bi->bi_offset,
+		gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
+		gfs2_setbit(rgd, bi->bi_bh->b_data + bi->bi_offset,
 			    bi->bi_len, blk, new_state);
+		if (bi->bi_clone)
+			gfs2_setbit(rgd, bi->bi_clone + bi->bi_offset,
+				    bi->bi_len, blk, new_state);
+	}
 
-	return bi->bi_start * GFS2_NBBY + blk;
+	return (blk == BFITNOENT) ? 0 : (bi->bi_start * GFS2_NBBY) + blk;
 }
 
 /**
@@ -1156,9 +1341,9 @@ static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart,
 		return NULL;
 	}
 
-	length = rgd->rd_ri.ri_length;
+	length = rgd->rd_length;
 
-	rgrp_blk = bstart - rgd->rd_ri.ri_data0;
+	rgrp_blk = bstart - rgd->rd_data0;
 
 	while (blen--) {
 		for (buf = 0; buf < length; buf++) {
@@ -1202,15 +1387,15 @@ u64 gfs2_alloc_data(struct gfs2_inode *ip)
 	u32 goal, blk;
 	u64 block;
 
-	if (rgrp_contains_block(&rgd->rd_ri, ip->i_di.di_goal_data))
-		goal = ip->i_di.di_goal_data - rgd->rd_ri.ri_data0;
+	if (rgrp_contains_block(rgd, ip->i_di.di_goal_data))
+		goal = ip->i_di.di_goal_data - rgd->rd_data0;
 	else
 		goal = rgd->rd_last_alloc_data;
 
 	blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, GFS2_BLKST_USED);
 	rgd->rd_last_alloc_data = blk;
 
-	block = rgd->rd_ri.ri_data0 + blk;
+	block = rgd->rd_data0 + blk;
 	ip->i_di.di_goal_data = block;
 
 	gfs2_assert_withdraw(sdp, rgd->rd_rg.rg_free);
@@ -1246,15 +1431,15 @@ u64 gfs2_alloc_meta(struct gfs2_inode *ip)
 	u32 goal, blk;
 	u64 block;
 
-	if (rgrp_contains_block(&rgd->rd_ri, ip->i_di.di_goal_meta))
-		goal = ip->i_di.di_goal_meta - rgd->rd_ri.ri_data0;
+	if (rgrp_contains_block(rgd, ip->i_di.di_goal_meta))
+		goal = ip->i_di.di_goal_meta - rgd->rd_data0;
 	else
 		goal = rgd->rd_last_alloc_meta;
 
 	blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, GFS2_BLKST_USED);
 	rgd->rd_last_alloc_meta = blk;
 
-	block = rgd->rd_ri.ri_data0 + blk;
+	block = rgd->rd_data0 + blk;
 	ip->i_di.di_goal_meta = block;
 
 	gfs2_assert_withdraw(sdp, rgd->rd_rg.rg_free);
@@ -1296,7 +1481,7 @@ u64 gfs2_alloc_di(struct gfs2_inode *dip, u64 *generation)
 
 	rgd->rd_last_alloc_meta = blk;
 
-	block = rgd->rd_ri.ri_data0 + blk;
+	block = rgd->rd_data0 + blk;
 
 	gfs2_assert_withdraw(sdp, rgd->rd_rg.rg_free);
 	rgd->rd_rg.rg_free--;
@@ -1379,7 +1564,7 @@ void gfs2_unlink_di(struct inode *inode)
 	struct gfs2_inode *ip = GFS2_I(inode);
 	struct gfs2_sbd *sdp = GFS2_SB(inode);
 	struct gfs2_rgrpd *rgd;
-	u64 blkno = ip->i_num.no_addr;
+	u64 blkno = ip->i_no_addr;
 
 	rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_UNLINKED);
 	if (!rgd)
@@ -1414,9 +1599,9 @@ static void gfs2_free_uninit_di(struct gfs2_rgrpd *rgd, u64 blkno)
 
 void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip)
 {
-	gfs2_free_uninit_di(rgd, ip->i_num.no_addr);
+	gfs2_free_uninit_di(rgd, ip->i_no_addr);
 	gfs2_quota_change(ip, -1, ip->i_inode.i_uid, ip->i_inode.i_gid);
-	gfs2_meta_wipe(ip, ip->i_num.no_addr, 1);
+	gfs2_meta_wipe(ip, ip->i_no_addr, 1);
 }
 
 /**
diff --git a/fs/gfs2/rgrp.h b/fs/gfs2/rgrp.h
index b01e0cf..b4c6adf 100644
--- a/fs/gfs2/rgrp.h
+++ b/fs/gfs2/rgrp.h
@@ -65,5 +65,6 @@ void gfs2_rlist_add(struct gfs2_sbd *sdp, struct gfs2_rgrp_list *rlist,
 void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state,
 		      int flags);
 void gfs2_rlist_free(struct gfs2_rgrp_list *rlist);
+u64 gfs2_ri_total(struct gfs2_sbd *sdp);
 
 #endif /* __RGRP_DOT_H__ */
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 4fdda97..f916b97 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -95,8 +95,8 @@ int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent)
 {
 	unsigned int x;
 
-	if (sb->sb_header.mh_magic != GFS2_MAGIC ||
-	    sb->sb_header.mh_type != GFS2_METATYPE_SB) {
+	if (sb->sb_magic != GFS2_MAGIC ||
+	    sb->sb_type != GFS2_METATYPE_SB) {
 		if (!silent)
 			printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n");
 		return -EINVAL;
@@ -174,10 +174,31 @@ static int end_bio_io_page(struct bio *bio, unsigned int bytes_done, int error)
 	return 0;
 }
 
+static void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf)
+{
+	const struct gfs2_sb *str = buf;
+
+	sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic);
+	sb->sb_type = be32_to_cpu(str->sb_header.mh_type);
+	sb->sb_format = be32_to_cpu(str->sb_header.mh_format);
+	sb->sb_fs_format = be32_to_cpu(str->sb_fs_format);
+	sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format);
+	sb->sb_bsize = be32_to_cpu(str->sb_bsize);
+	sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift);
+	sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr);
+	sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino);
+	sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr);
+	sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino);
+
+	memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
+	memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
+}
+
 /**
  * gfs2_read_super - Read the gfs2 super block from disk
- * @sb: The VFS super block
+ * @sdp: The GFS2 super block
  * @sector: The location of the super block
+ * @error: The error code to return
  *
  * This uses the bio functions to read the super block from disk
  * because we want to be 100% sure that we never read cached data.
@@ -189,17 +210,19 @@ static int end_bio_io_page(struct bio *bio, unsigned int bytes_done, int error)
  * the master directory (contains pointers to journals etc) and the
  * root directory.
  *
- * Returns: A page containing the sb or NULL
+ * Returns: 0 on success or error
  */
 
-struct page *gfs2_read_super(struct super_block *sb, sector_t sector)
+int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector)
 {
+	struct super_block *sb = sdp->sd_vfs;
+	struct gfs2_sb *p;
 	struct page *page;
 	struct bio *bio;
 
 	page = alloc_page(GFP_KERNEL);
 	if (unlikely(!page))
-		return NULL;
+		return -ENOBUFS;
 
 	ClearPageUptodate(page);
 	ClearPageDirty(page);
@@ -208,7 +231,7 @@ struct page *gfs2_read_super(struct super_block *sb, sector_t sector)
 	bio = bio_alloc(GFP_KERNEL, 1);
 	if (unlikely(!bio)) {
 		__free_page(page);
-		return NULL;
+		return -ENOBUFS;
 	}
 
 	bio->bi_sector = sector * (sb->s_blocksize >> 9);
@@ -222,9 +245,13 @@ struct page *gfs2_read_super(struct super_block *sb, sector_t sector)
 	bio_put(bio);
 	if (!PageUptodate(page)) {
 		__free_page(page);
-		return NULL;
+		return -EIO;
 	}
-	return page;
+	p = kmap(page);
+	gfs2_sb_in(&sdp->sd_sb, p);
+	kunmap(page);
+	__free_page(page);
+	return 0;
 }
 
 /**
@@ -241,19 +268,13 @@ int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent)
 	u32 tmp_blocks;
 	unsigned int x;
 	int error;
-	struct page *page;
-	char *sb;
 
-	page = gfs2_read_super(sdp->sd_vfs, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
-	if (!page) {
+	error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
+	if (error) {
 		if (!silent)
 			fs_err(sdp, "can't read superblock\n");
-		return -EIO;
+		return error;
 	}
-	sb = kmap(page);
-	gfs2_sb_in(&sdp->sd_sb, sb);
-	kunmap(page);
-	__free_page(page);
 
 	error = gfs2_check_sb(sdp, &sdp->sd_sb, silent);
 	if (error)
@@ -360,7 +381,7 @@ int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
 		name.len = sprintf(buf, "journal%u", sdp->sd_journals);
 		name.hash = gfs2_disk_hash(name.name, name.len);
 
-		error = gfs2_dir_search(sdp->sd_jindex, &name, NULL, NULL);
+		error = gfs2_dir_check(sdp->sd_jindex, &name, NULL);
 		if (error == -ENOENT) {
 			error = 0;
 			break;
@@ -593,6 +614,24 @@ int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
 	return error;
 }
 
+static void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf)
+{
+	const struct gfs2_statfs_change *str = buf;
+
+	sc->sc_total = be64_to_cpu(str->sc_total);
+	sc->sc_free = be64_to_cpu(str->sc_free);
+	sc->sc_dinodes = be64_to_cpu(str->sc_dinodes);
+}
+
+static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf)
+{
+	struct gfs2_statfs_change *str = buf;
+
+	str->sc_total = cpu_to_be64(sc->sc_total);
+	str->sc_free = cpu_to_be64(sc->sc_free);
+	str->sc_dinodes = cpu_to_be64(sc->sc_dinodes);
+}
+
 int gfs2_statfs_init(struct gfs2_sbd *sdp)
 {
 	struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
@@ -772,7 +811,7 @@ static int statfs_slow_fill(struct gfs2_rgrpd *rgd,
 			    struct gfs2_statfs_change_host *sc)
 {
 	gfs2_rgrp_verify(rgd);
-	sc->sc_total += rgd->rd_ri.ri_data;
+	sc->sc_total += rgd->rd_data;
 	sc->sc_free += rgd->rd_rg.rg_free;
 	sc->sc_dinodes += rgd->rd_rg.rg_dinodes;
 	return 0;
diff --git a/fs/gfs2/super.h b/fs/gfs2/super.h
index e590b2d..60a870e 100644
--- a/fs/gfs2/super.h
+++ b/fs/gfs2/super.h
@@ -16,7 +16,7 @@ void gfs2_tune_init(struct gfs2_tune *gt);
 
 int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent);
 int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent);
-struct page *gfs2_read_super(struct super_block *sb, sector_t sector);
+int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector);
 
 static inline unsigned int gfs2_jindex_size(struct gfs2_sbd *sdp)
 {
diff --git a/fs/gfs2/util.c b/fs/gfs2/util.c
index 601eaa1..424a077 100644
--- a/fs/gfs2/util.c
+++ b/fs/gfs2/util.c
@@ -115,8 +115,8 @@ int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
 		"GFS2: fsid=%s:   inode = %llu %llu\n"
 		"GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 		sdp->sd_fsname,
-		sdp->sd_fsname, (unsigned long long)ip->i_num.no_formal_ino,
-		(unsigned long long)ip->i_num.no_addr,
+		sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,
+		(unsigned long long)ip->i_no_addr,
 		sdp->sd_fsname, function, file, line);
 	return rv;
 }
@@ -137,7 +137,7 @@ int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
 		"GFS2: fsid=%s:   RG = %llu\n"
 		"GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 		sdp->sd_fsname,
-		sdp->sd_fsname, (unsigned long long)rgd->rd_ri.ri_addr,
+		sdp->sd_fsname, (unsigned long long)rgd->rd_addr,
 		sdp->sd_fsname, function, file, line);
 	return rv;
 }
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index 9a934db..bc835f2 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -607,7 +607,7 @@ static const struct file_operations hfs_file_operations = {
 	.write		= do_sync_write,
 	.aio_write	= generic_file_aio_write,
 	.mmap		= generic_file_mmap,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 	.fsync		= file_fsync,
 	.open		= hfs_file_open,
 	.release	= hfs_file_release,
diff --git a/fs/hfsplus/btree.c b/fs/hfsplus/btree.c
index 90ebab7..050d29c 100644
--- a/fs/hfsplus/btree.c
+++ b/fs/hfsplus/btree.c
@@ -62,8 +62,10 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id)
 		if ((HFSPLUS_SB(sb).flags & HFSPLUS_SB_HFSX) &&
 		    (head->key_type == HFSPLUS_KEY_BINARY))
 			tree->keycmp = hfsplus_cat_bin_cmp_key;
-		else
+		else {
 			tree->keycmp = hfsplus_cat_case_cmp_key;
+			HFSPLUS_SB(sb).flags |= HFSPLUS_SB_CASEFOLD;
+		}
 	} else {
 		printk(KERN_ERR "hfs: unknown B*Tree requested\n");
 		goto fail_page;
diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index 80b5682..1955ee6 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -36,6 +36,8 @@ static struct dentry *hfsplus_lookup(struct inode *dir, struct dentry *dentry,
 	u16 type;
 
 	sb = dir->i_sb;
+
+	dentry->d_op = &hfsplus_dentry_operations;
 	dentry->d_fsdata = NULL;
 	hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
 	hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, &dentry->d_name);
diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h
index 3915635..d9f5eda 100644
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/fs/hfsplus/hfsplus_fs.h
@@ -150,6 +150,7 @@ struct hfsplus_sb_info {
 #define HFSPLUS_SB_NODECOMPOSE	0x0002
 #define HFSPLUS_SB_FORCE	0x0004
 #define HFSPLUS_SB_HFSX		0x0008
+#define HFSPLUS_SB_CASEFOLD	0x0010
 
 
 struct hfsplus_inode_info {
@@ -321,6 +322,7 @@ void hfsplus_file_truncate(struct inode *);
 /* inode.c */
 extern const struct address_space_operations hfsplus_aops;
 extern const struct address_space_operations hfsplus_btree_aops;
+extern struct dentry_operations hfsplus_dentry_operations;
 
 void hfsplus_inode_read_fork(struct inode *, struct hfsplus_fork_raw *);
 void hfsplus_inode_write_fork(struct inode *, struct hfsplus_fork_raw *);
@@ -353,6 +355,8 @@ int hfsplus_strcasecmp(const struct hfsplus_unistr *, const struct hfsplus_unist
 int hfsplus_strcmp(const struct hfsplus_unistr *, const struct hfsplus_unistr *);
 int hfsplus_uni2asc(struct super_block *, const struct hfsplus_unistr *, char *, int *);
 int hfsplus_asc2uni(struct super_block *, struct hfsplus_unistr *, const char *, int);
+int hfsplus_hash_dentry(struct dentry *dentry, struct qstr *str);
+int hfsplus_compare_dentry(struct dentry *dentry, struct qstr *s1, struct qstr *s2);
 
 /* wrapper.c */
 int hfsplus_read_wrapper(struct super_block *);
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 45dab5d..6f7c662 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -131,6 +131,11 @@ const struct address_space_operations hfsplus_aops = {
 	.writepages	= hfsplus_writepages,
 };
 
+struct dentry_operations hfsplus_dentry_operations = {
+	.d_hash       = hfsplus_hash_dentry,
+	.d_compare    = hfsplus_compare_dentry,
+};
+
 static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dentry,
 					  struct nameidata *nd)
 {
@@ -288,7 +293,7 @@ static const struct file_operations hfsplus_file_operations = {
 	.write		= do_sync_write,
 	.aio_write	= generic_file_aio_write,
 	.mmap		= generic_file_mmap,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 	.fsync		= file_fsync,
 	.open		= hfsplus_file_open,
 	.release	= hfsplus_file_release,
diff --git a/fs/hfsplus/ioctl.c b/fs/hfsplus/ioctl.c
index 79fd104..b60c0af 100644
--- a/fs/hfsplus/ioctl.c
+++ b/fs/hfsplus/ioctl.c
@@ -38,7 +38,7 @@ int hfsplus_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 		if (IS_RDONLY(inode))
 			return -EROFS;
 
-		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+		if (!is_owner_or_cap(inode))
 			return -EACCES;
 
 		if (get_user(flags, (int __user *)arg))
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index ebd1b38..6d87a2a 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -283,11 +283,10 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
 	struct nls_table *nls = NULL;
 	int err = -EINVAL;
 
-	sbi = kmalloc(sizeof(struct hfsplus_sb_info), GFP_KERNEL);
+	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
 	if (!sbi)
 		return -ENOMEM;
 
-	memset(sbi, 0, sizeof(HFSPLUS_SB(sb)));
 	sb->s_fs_info = sbi;
 	INIT_HLIST_HEAD(&sbi->rsrc_inodes);
 	hfsplus_fill_defaults(sbi);
@@ -381,6 +380,7 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
 		iput(root);
 		goto cleanup;
 	}
+	sb->s_root->d_op = &hfsplus_dentry_operations;
 
 	str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1;
 	str.name = HFSP_HIDDENDIR_NAME;
diff --git a/fs/hfsplus/unicode.c b/fs/hfsplus/unicode.c
index 689c8bd..9e10f94 100644
--- a/fs/hfsplus/unicode.c
+++ b/fs/hfsplus/unicode.c
@@ -239,61 +239,201 @@ out:
 	return res;
 }
 
-int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr, const char *astr, int len)
+/*
+ * Convert one or more ASCII characters into a single unicode character.
+ * Returns the number of ASCII characters corresponding to the unicode char.
+ */
+static inline int asc2unichar(struct super_block *sb, const char *astr, int len,
+			      wchar_t *uc)
 {
-	struct nls_table *nls = HFSPLUS_SB(sb).nls;
-	int size, off, decompose;
+	int size = HFSPLUS_SB(sb).nls->char2uni(astr, len, uc);
+	if (size <= 0) {
+		*uc = '?';
+		size = 1;
+	}
+	switch (*uc) {
+	case 0x2400:
+		*uc = 0;
+		break;
+	case ':':
+		*uc = '/';
+		break;
+	}
+	return size;
+}
+
+/* Decomposes a single unicode character. */
+static inline u16 *decompose_unichar(wchar_t uc, int *size)
+{
+	int off;
+
+	off = hfsplus_decompose_table[(uc >> 12) & 0xf];
+	if (off == 0 || off == 0xffff)
+		return NULL;
+
+	off = hfsplus_decompose_table[off + ((uc >> 8) & 0xf)];
+	if (!off)
+		return NULL;
+
+	off = hfsplus_decompose_table[off + ((uc >> 4) & 0xf)];
+	if (!off)
+		return NULL;
+
+	off = hfsplus_decompose_table[off + (uc & 0xf)];
+	*size = off & 3;
+	if (*size == 0)
+		return NULL;
+	return hfsplus_decompose_table + (off / 4);
+}
+
+int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr,
+		    const char *astr, int len)
+{
+	int size, dsize, decompose;
+	u16 *dstr, outlen = 0;
 	wchar_t c;
-	u16 outlen = 0;
 
 	decompose = !(HFSPLUS_SB(sb).flags & HFSPLUS_SB_NODECOMPOSE);
-
 	while (outlen < HFSPLUS_MAX_STRLEN && len > 0) {
-		size = nls->char2uni(astr, len, &c);
-		if (size <= 0) {
-			c = '?';
-			size = 1;
-		}
-		astr += size;
-		len -= size;
-		switch (c) {
-		case 0x2400:
-			c = 0;
-			break;
-		case ':':
-			c = '/';
-			break;
-		}
-		if (c >= 0xc0 && decompose) {
-			off = hfsplus_decompose_table[(c >> 12) & 0xf];
-			if (!off)
-				goto done;
-			if (off == 0xffff) {
-				goto done;
-			}
-			off = hfsplus_decompose_table[off + ((c >> 8) & 0xf)];
-			if (!off)
-				goto done;
-			off = hfsplus_decompose_table[off + ((c >> 4) & 0xf)];
-			if (!off)
-				goto done;
-			off = hfsplus_decompose_table[off + (c & 0xf)];
-			size = off & 3;
-			if (!size)
-				goto done;
-			off /= 4;
-			if (outlen + size > HFSPLUS_MAX_STRLEN)
+		size = asc2unichar(sb, astr, len, &c);
+
+		if (decompose && (dstr = decompose_unichar(c, &dsize))) {
+			if (outlen + dsize > HFSPLUS_MAX_STRLEN)
 				break;
 			do {
-				ustr->unicode[outlen++] = cpu_to_be16(hfsplus_decompose_table[off++]);
-			} while (--size > 0);
-			continue;
-		}
-	done:
-		ustr->unicode[outlen++] = cpu_to_be16(c);
+				ustr->unicode[outlen++] = cpu_to_be16(*dstr++);
+			} while (--dsize > 0);
+		} else
+			ustr->unicode[outlen++] = cpu_to_be16(c);
+
+		astr += size;
+		len -= size;
 	}
 	ustr->length = cpu_to_be16(outlen);
 	if (len > 0)
 		return -ENAMETOOLONG;
 	return 0;
 }
+
+/*
+ * Hash a string to an integer as appropriate for the HFS+ filesystem.
+ * Composed unicode characters are decomposed and case-folding is performed
+ * if the appropriate bits are (un)set on the superblock.
+ */
+int hfsplus_hash_dentry(struct dentry *dentry, struct qstr *str)
+{
+	struct super_block *sb = dentry->d_sb;
+	const char *astr;
+	const u16 *dstr;
+	int casefold, decompose, size, dsize, len;
+	unsigned long hash;
+	wchar_t c;
+	u16 c2;
+
+	casefold = (HFSPLUS_SB(sb).flags & HFSPLUS_SB_CASEFOLD);
+	decompose = !(HFSPLUS_SB(sb).flags & HFSPLUS_SB_NODECOMPOSE);
+	hash = init_name_hash();
+	astr = str->name;
+	len = str->len;
+	while (len > 0) {
+		size = asc2unichar(sb, astr, len, &c);
+		astr += size;
+		len -= size;
+
+		if (decompose && (dstr = decompose_unichar(c, &dsize))) {
+			do {
+				c2 = *dstr++;
+				if (!casefold || (c2 = case_fold(c2)))
+					hash = partial_name_hash(c2, hash);
+			} while (--dsize > 0);
+		} else {
+			c2 = c;
+			if (!casefold || (c2 = case_fold(c2)))
+				hash = partial_name_hash(c2, hash);
+		}
+	}
+	str->hash = end_name_hash(hash);
+
+	return 0;
+}
+
+/*
+ * Compare strings with HFS+ filename ordering.
+ * Composed unicode characters are decomposed and case-folding is performed
+ * if the appropriate bits are (un)set on the superblock.
+ */
+int hfsplus_compare_dentry(struct dentry *dentry, struct qstr *s1, struct qstr *s2)
+{
+	struct super_block *sb = dentry->d_sb;
+	int casefold, decompose, size;
+	int dsize1, dsize2, len1, len2;
+	const u16 *dstr1, *dstr2;
+	const char *astr1, *astr2;
+	u16 c1, c2;
+	wchar_t c;
+
+	casefold = (HFSPLUS_SB(sb).flags & HFSPLUS_SB_CASEFOLD);
+	decompose = !(HFSPLUS_SB(sb).flags & HFSPLUS_SB_NODECOMPOSE);
+	astr1 = s1->name;
+	len1 = s1->len;
+	astr2 = s2->name;
+	len2 = s2->len;
+	dsize1 = dsize2 = 0;
+	dstr1 = dstr2 = NULL;
+
+	while (len1 > 0 && len2 > 0) {
+		if (!dsize1) {
+			size = asc2unichar(sb, astr1, len1, &c);
+			astr1 += size;
+			len1 -= size;
+
+			if (!decompose || !(dstr1 = decompose_unichar(c, &dsize1))) {
+				c1 = c;
+				dstr1 = &c1;
+				dsize1 = 1;
+			}
+		}
+
+		if (!dsize2) {
+			size = asc2unichar(sb, astr2, len2, &c);
+			astr2 += size;
+			len2 -= size;
+
+			if (!decompose || !(dstr2 = decompose_unichar(c, &dsize2))) {
+				c2 = c;
+				dstr2 = &c2;
+				dsize2 = 1;
+			}
+		}
+
+		c1 = *dstr1;
+		c2 = *dstr2;
+		if (casefold) {
+			if  (!(c1 = case_fold(c1))) {
+				dstr1++;
+				dsize1--;
+				continue;
+			}
+			if (!(c2 = case_fold(c2))) {
+				dstr2++;
+				dsize2--;
+				continue;
+			}
+		}
+		if (c1 < c2)
+			return -1;
+		else if (c1 > c2)
+			return 1;
+
+		dstr1++;
+		dsize1--;
+		dstr2++;
+		dsize2--;
+	}
+
+	if (len1 < len2)
+		return -1;
+	if (len1 > len2)
+		return 1;
+	return 0;
+}
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 8286491..c778620 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -390,7 +390,7 @@ int hostfs_fsync(struct file *file, struct dentry *dentry, int datasync)
 static const struct file_operations hostfs_file_fops = {
 	.llseek		= generic_file_llseek,
 	.read		= do_sync_read,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 	.aio_read	= generic_file_aio_read,
 	.aio_write	= generic_file_aio_write,
 	.write		= do_sync_write,
diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c
index b4eafc0..5b53e5c 100644
--- a/fs/hpfs/file.c
+++ b/fs/hpfs/file.c
@@ -129,7 +129,7 @@ const struct file_operations hpfs_file_ops =
 	.mmap		= generic_file_mmap,
 	.release	= hpfs_file_release,
 	.fsync		= hpfs_file_fsync,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 };
 
 const struct inode_operations hpfs_file_iops =
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index e6b46b3..d145cb7 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -13,15 +13,18 @@
 #include <linux/fs.h>
 #include <linux/mount.h>
 #include <linux/file.h>
+#include <linux/kernel.h>
 #include <linux/writeback.h>
 #include <linux/pagemap.h>
 #include <linux/highmem.h>
 #include <linux/init.h>
 #include <linux/string.h>
 #include <linux/capability.h>
+#include <linux/ctype.h>
 #include <linux/backing-dev.h>
 #include <linux/hugetlb.h>
 #include <linux/pagevec.h>
+#include <linux/parser.h>
 #include <linux/mman.h>
 #include <linux/quotaops.h>
 #include <linux/slab.h>
@@ -47,6 +50,21 @@ static struct backing_dev_info hugetlbfs_backing_dev_info = {
 
 int sysctl_hugetlb_shm_group;
 
+enum {
+	Opt_size, Opt_nr_inodes,
+	Opt_mode, Opt_uid, Opt_gid,
+	Opt_err,
+};
+
+static match_table_t tokens = {
+	{Opt_size,	"size=%s"},
+	{Opt_nr_inodes,	"nr_inodes=%s"},
+	{Opt_mode,	"mode=%o"},
+	{Opt_uid,	"uid=%u"},
+	{Opt_gid,	"gid=%u"},
+	{Opt_err,	NULL},
+};
+
 static void huge_pagevec_release(struct pagevec *pvec)
 {
 	int i;
@@ -594,46 +612,73 @@ static const struct super_operations hugetlbfs_ops = {
 static int
 hugetlbfs_parse_options(char *options, struct hugetlbfs_config *pconfig)
 {
-	char *opt, *value, *rest;
+	char *p, *rest;
+	substring_t args[MAX_OPT_ARGS];
+	int option;
 
 	if (!options)
 		return 0;
-	while ((opt = strsep(&options, ",")) != NULL) {
-		if (!*opt)
+
+	while ((p = strsep(&options, ",")) != NULL) {
+		int token;
+		if (!*p)
 			continue;
 
-		value = strchr(opt, '=');
-		if (!value || !*value)
-			return -EINVAL;
-		else
-			*value++ = '\0';
-
-		if (!strcmp(opt, "uid"))
-			pconfig->uid = simple_strtoul(value, &value, 0);
-		else if (!strcmp(opt, "gid"))
-			pconfig->gid = simple_strtoul(value, &value, 0);
-		else if (!strcmp(opt, "mode"))
-			pconfig->mode = simple_strtoul(value,&value,0) & 0777U;
-		else if (!strcmp(opt, "size")) {
-			unsigned long long size = memparse(value, &rest);
+		token = match_token(p, tokens, args);
+		switch (token) {
+		case Opt_uid:
+			if (match_int(&args[0], &option))
+ 				goto bad_val;
+			pconfig->uid = option;
+			break;
+
+		case Opt_gid:
+			if (match_int(&args[0], &option))
+ 				goto bad_val;
+			pconfig->gid = option;
+			break;
+
+		case Opt_mode:
+			if (match_octal(&args[0], &option))
+ 				goto bad_val;
+			pconfig->mode = option & 0777U;
+			break;
+
+		case Opt_size: {
+ 			unsigned long long size;
+			/* memparse() will accept a K/M/G without a digit */
+			if (!isdigit(*args[0].from))
+				goto bad_val;
+			size = memparse(args[0].from, &rest);
 			if (*rest == '%') {
 				size <<= HPAGE_SHIFT;
 				size *= max_huge_pages;
 				do_div(size, 100);
-				rest++;
 			}
 			pconfig->nr_blocks = (size >> HPAGE_SHIFT);
-			value = rest;
-		} else if (!strcmp(opt,"nr_inodes")) {
-			pconfig->nr_inodes = memparse(value, &rest);
-			value = rest;
-		} else
-			return -EINVAL;
+			break;
+		}
+
+		case Opt_nr_inodes:
+			/* memparse() will accept a K/M/G without a digit */
+			if (!isdigit(*args[0].from))
+				goto bad_val;
+			pconfig->nr_inodes = memparse(args[0].from, &rest);
+			break;
 
-		if (*value)
+		default:
+			printk(KERN_ERR "hugetlbfs: Bad mount option: \"%s\"\n",
+				 p);
 			return -EINVAL;
+			break;
+		}
 	}
 	return 0;
+
+bad_val:
+ 	printk(KERN_ERR "hugetlbfs: Bad value '%s' for mount option '%s'\n",
+	       args[0].from, p);
+ 	return 1;
 }
 
 static int
@@ -651,7 +696,6 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
 	config.gid = current->fsgid;
 	config.mode = 0755;
 	ret = hugetlbfs_parse_options(data, &config);
-
 	if (ret)
 		return ret;
 
diff --git a/fs/inode.c b/fs/inode.c
index 9a012cc..320e088 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -145,7 +145,7 @@ static struct inode *alloc_inode(struct super_block *sb)
 		mapping->a_ops = &empty_aops;
  		mapping->host = inode;
 		mapping->flags = 0;
-		mapping_set_gfp_mask(mapping, GFP_HIGHUSER);
+		mapping_set_gfp_mask(mapping, GFP_HIGHUSER_PAGECACHE);
 		mapping->assoc_mapping = NULL;
 		mapping->backing_dev_info = &default_backing_dev_info;
 
@@ -462,6 +462,11 @@ static int shrink_icache_memory(int nr, gfp_t gfp_mask)
 	return (inodes_stat.nr_unused / 100) * sysctl_vfs_cache_pressure;
 }
 
+static struct shrinker icache_shrinker = {
+	.shrink = shrink_icache_memory,
+	.seeks = DEFAULT_SEEKS,
+};
+
 static void __wait_on_freeing_inode(struct inode *inode);
 /*
  * Called with the inode lock held.
@@ -519,7 +524,13 @@ repeat:
  *	new_inode 	- obtain an inode
  *	@sb: superblock
  *
- *	Allocates a new inode for given superblock.
+ *	Allocates a new inode for given superblock. The default gfp_mask
+ *	for allocations related to inode->i_mapping is GFP_HIGHUSER_PAGECACHE.
+ *	If HIGHMEM pages are unsuitable or it is known that pages allocated
+ *	for the page cache are not reclaimable or migratable,
+ *	mapping_set_gfp_mask() must be called with suitable flags on the
+ *	newly created inode's mapping
+ *
  */
 struct inode *new_inode(struct super_block *sb)
 {
@@ -1379,7 +1390,7 @@ void __init inode_init(unsigned long mempages)
 					 SLAB_MEM_SPREAD),
 					 init_once,
 					 NULL);
-	set_shrinker(DEFAULT_SEEKS, shrink_icache_memory);
+	register_shrinker(&icache_shrinker);
 
 	/* Hash may have been set up in inode_init_early */
 	if (!hashdist)
diff --git a/fs/ioctl.c b/fs/ioctl.c
index 8c90cbc..c2a773e 100644
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -12,7 +12,6 @@
 #include <linux/fs.h>
 #include <linux/security.h>
 #include <linux/module.h>
-#include <linux/kallsyms.h>
 
 #include <asm/uaccess.h>
 #include <asm/ioctls.h>
@@ -21,7 +20,6 @@ static long do_ioctl(struct file *filp, unsigned int cmd,
 		unsigned long arg)
 {
 	int error = -ENOTTY;
-	void *f;
 
 	if (!filp->f_op)
 		goto out;
@@ -31,16 +29,10 @@ static long do_ioctl(struct file *filp, unsigned int cmd,
 		if (error == -ENOIOCTLCMD)
 			error = -EINVAL;
 		goto out;
-	} else if ((f = filp->f_op->ioctl)) {
+	} else if (filp->f_op->ioctl) {
 		lock_kernel();
-		if (!filp->f_op->ioctl) {
-			printk("%s: ioctl %p disappeared\n", __FUNCTION__, f);
-			print_symbol("symbol: %s\n", (unsigned long)f);
-			dump_stack();
-		} else {
-			error = filp->f_op->ioctl(filp->f_path.dentry->d_inode,
-						  filp, cmd, arg);
-		}
+		error = filp->f_op->ioctl(filp->f_path.dentry->d_inode,
+					  filp, cmd, arg);
 		unlock_kernel();
 	}
 
@@ -182,11 +174,3 @@ asmlinkage long sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
  out:
 	return error;
 }
-
-/*
- * Platforms implementing 32 bit compatibility ioctl handlers in
- * modules need this exported
- */
-#ifdef CONFIG_COMPAT
-EXPORT_SYMBOL(sys_ioctl);
-#endif
diff --git a/fs/isofs/dir.c b/fs/isofs/dir.c
index 0e94c31..1ba407c 100644
--- a/fs/isofs/dir.c
+++ b/fs/isofs/dir.c
@@ -7,34 +7,18 @@
  *
  *  Steve Beynon		       : Missing last directory entries fixed
  *  (stephen@askone.demon.co.uk)      : 21st June 1996
- * 
+ *
  *  isofs directory handling functions
  */
 #include <linux/smp_lock.h>
 #include "isofs.h"
 
-static int isofs_readdir(struct file *, void *, filldir_t);
-
-const struct file_operations isofs_dir_operations =
-{
-	.read		= generic_read_dir,
-	.readdir	= isofs_readdir,
-};
-
-/*
- * directories can handle most operations...
- */
-const struct inode_operations isofs_dir_inode_operations =
-{
-	.lookup		= isofs_lookup,
-};
-
 int isofs_name_translate(struct iso_directory_record *de, char *new, struct inode *inode)
 {
 	char * old = de->name;
 	int len = de->name_len[0];
 	int i;
-			
+
 	for (i = 0; i < len; i++) {
 		unsigned char c = old[i];
 		if (!c)
@@ -62,22 +46,27 @@ int isofs_name_translate(struct iso_directory_record *de, char *new, struct inod
 }
 
 /* Acorn extensions written by Matthew Wilcox <willy@bofh.ai> 1998 */
-int get_acorn_filename(struct iso_directory_record * de,
-			    char * retname, struct inode * inode)
+int get_acorn_filename(struct iso_directory_record *de,
+			    char *retname, struct inode *inode)
 {
 	int std;
-	unsigned char * chr;
+	unsigned char *chr;
 	int retnamlen = isofs_name_translate(de, retname, inode);
-	if (retnamlen == 0) return 0;
+
+	if (retnamlen == 0)
+		return 0;
 	std = sizeof(struct iso_directory_record) + de->name_len[0];
-	if (std & 1) std++;
-	if ((*((unsigned char *) de) - std) != 32) return retnamlen;
+	if (std & 1)
+		std++;
+	if ((*((unsigned char *) de) - std) != 32)
+		return retnamlen;
 	chr = ((unsigned char *) de) + std;
-	if (strncmp(chr, "ARCHIMEDES", 10)) return retnamlen;
-	if ((*retname == '_') && ((chr[19] & 1) == 1)) *retname = '!';
+	if (strncmp(chr, "ARCHIMEDES", 10))
+		return retnamlen;
+	if ((*retname == '_') && ((chr[19] & 1) == 1))
+		*retname = '!';
 	if (((de->flags[0] & 2) == 0) && (chr[13] == 0xff)
-		&& ((chr[12] & 0xf0) == 0xf0))
-	{
+		&& ((chr[12] & 0xf0) == 0xf0)) {
 		retname[retnamlen] = ',';
 		sprintf(retname+retnamlen+1, "%3.3x",
 			((chr[12] & 0xf) << 8) | chr[11]);
@@ -91,7 +80,7 @@ int get_acorn_filename(struct iso_directory_record * de,
  */
 static int do_isofs_readdir(struct inode *inode, struct file *filp,
 		void *dirent, filldir_t filldir,
-		char * tmpname, struct iso_directory_record * tmpde)
+		char *tmpname, struct iso_directory_record *tmpde)
 {
 	unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
 	unsigned char bufbits = ISOFS_BUFFER_BITS(inode);
@@ -121,9 +110,11 @@ static int do_isofs_readdir(struct inode *inode, struct file *filp,
 
 		de_len = *(unsigned char *) de;
 
-		/* If the length byte is zero, we should move on to the next
-		   CDROM sector.  If we are at the end of the directory, we
-		   kick out of the while loop. */
+		/*
+		 * If the length byte is zero, we should move on to the next
+		 * CDROM sector.  If we are at the end of the directory, we
+		 * kick out of the while loop.
+		 */
 
 		if (de_len == 0) {
 			brelse(bh);
@@ -157,11 +148,10 @@ static int do_isofs_readdir(struct inode *inode, struct file *filp,
 
 		if (first_de) {
 			isofs_normalize_block_and_offset(de,
-							 &block_saved,
-							 &offset_saved);
+							&block_saved,
+							&offset_saved);
 			inode_number = isofs_get_ino(block_saved,
-						     offset_saved,
-						     bufbits);
+							offset_saved, bufbits);
 		}
 
 		if (de->flags[-sbi->s_high_sierra] & 0x80) {
@@ -199,7 +189,7 @@ static int do_isofs_readdir(struct inode *inode, struct file *filp,
 		 */
 		if ((sbi->s_hide == 'y' &&
 				(de->flags[-sbi->s_high_sierra] & 1)) ||
-		      (sbi->s_showassoc =='n' &&
+				(sbi->s_showassoc =='n' &&
 				(de->flags[-sbi->s_high_sierra] & 4))) {
 			filp->f_pos += de_len;
 			continue;
@@ -240,7 +230,8 @@ static int do_isofs_readdir(struct inode *inode, struct file *filp,
 
 		continue;
 	}
-	if (bh) brelse(bh);
+	if (bh)
+		brelse(bh);
 	return 0;
 }
 
@@ -253,8 +244,8 @@ static int isofs_readdir(struct file *filp,
 		void *dirent, filldir_t filldir)
 {
 	int result;
-	char * tmpname;
-	struct iso_directory_record * tmpde;
+	char *tmpname;
+	struct iso_directory_record *tmpde;
 	struct inode *inode = filp->f_path.dentry->d_inode;
 
 	tmpname = (char *)__get_free_page(GFP_KERNEL);
@@ -270,3 +261,19 @@ static int isofs_readdir(struct file *filp,
 	unlock_kernel();
 	return result;
 }
+
+const struct file_operations isofs_dir_operations =
+{
+	.read = generic_read_dir,
+	.readdir = isofs_readdir,
+};
+
+/*
+ * directories can handle most operations...
+ */
+const struct inode_operations isofs_dir_inode_operations =
+{
+	.lookup = isofs_lookup,
+};
+
+
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 5c3eecf..4f5418b 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -73,20 +73,20 @@ static void isofs_destroy_inode(struct inode *inode)
 	kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode));
 }
 
-static void init_once(void *foo, struct kmem_cache * cachep, unsigned long flags)
+static void init_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
 {
 	struct iso_inode_info *ei = foo;
 
 	inode_init_once(&ei->vfs_inode);
 }
- 
+
 static int init_inodecache(void)
 {
 	isofs_inode_cachep = kmem_cache_create("isofs_inode_cache",
-					     sizeof(struct iso_inode_info),
-					     0, (SLAB_RECLAIM_ACCOUNT|
-						SLAB_MEM_SPREAD),
-					     init_once, NULL);
+					sizeof(struct iso_inode_info),
+					0, (SLAB_RECLAIM_ACCOUNT|
+					SLAB_MEM_SPREAD),
+					init_once, NULL);
 	if (isofs_inode_cachep == NULL)
 		return -ENOMEM;
 	return 0;
@@ -150,9 +150,9 @@ struct iso9660_options{
 	uid_t uid;
 	char *iocharset;
 	unsigned char utf8;
-        /* LVE */
-        s32 session;
-        s32 sbsector;
+	/* LVE */
+	s32 session;
+	s32 sbsector;
 };
 
 /*
@@ -197,7 +197,7 @@ isofs_hashi_common(struct dentry *dentry, struct qstr *qstr, int ms)
 	hash = init_name_hash();
 	while (len--) {
 		c = tolower(*name++);
-		hash = partial_name_hash(tolower(c), hash);
+		hash = partial_name_hash(c, hash);
 	}
 	qstr->hash = end_name_hash(hash);
 
@@ -360,10 +360,12 @@ static int parse_options(char *options, struct iso9660_options *popt)
 	popt->check = 'u';		/* unset */
 	popt->nocompress = 0;
 	popt->blocksize = 1024;
-	popt->mode = S_IRUGO | S_IXUGO; /* r-x for all.  The disc could
-					   be shared with DOS machines so
-					   virtually anything could be
-					   a valid executable. */
+	popt->mode = S_IRUGO | S_IXUGO; /*
+					 * r-x for all.  The disc could
+					 * be shared with DOS machines so
+					 * virtually anything could be
+					 * a valid executable.
+					 */
 	popt->gid = 0;
 	popt->uid = 0;
 	popt->iocharset = NULL;
@@ -503,30 +505,30 @@ static unsigned int isofs_get_last_session(struct super_block *sb, s32 session)
 		Te.cdte_format=CDROM_LBA;
 		i = ioctl_by_bdev(bdev, CDROMREADTOCENTRY, (unsigned long) &Te);
 		if (!i) {
-			printk(KERN_DEBUG "Session %d start %d type %d\n",
-			       session, Te.cdte_addr.lba,
-			       Te.cdte_ctrl&CDROM_DATA_TRACK);
+			printk(KERN_DEBUG "ISOFS: Session %d start %d type %d\n",
+				session, Te.cdte_addr.lba,
+				Te.cdte_ctrl&CDROM_DATA_TRACK);
 			if ((Te.cdte_ctrl&CDROM_DATA_TRACK) == 4)
 				return Te.cdte_addr.lba;
 		}
-			
-		printk(KERN_ERR "Invalid session number or type of track\n");
+
+		printk(KERN_ERR "ISOFS: Invalid session number or type of track\n");
 	}
 	i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long) &ms_info);
 	if (session > 0)
-		printk(KERN_ERR "Invalid session number\n");
+		printk(KERN_ERR "ISOFS: Invalid session number\n");
 #if 0
-	printk("isofs.inode: CDROMMULTISESSION: rc=%d\n",i);
+	printk(KERN_DEBUG "isofs.inode: CDROMMULTISESSION: rc=%d\n",i);
 	if (i==0) {
-		printk("isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no");
-		printk("isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba);
+		printk(KERN_DEBUG "isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no");
+		printk(KERN_DEBUG "isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba);
 	}
 #endif
 	if (i==0)
 #if WE_OBEY_THE_WRITTEN_STANDARDS
-        if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */
+		if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */
 #endif
-		vol_desc_start=ms_info.addr.lba;
+			vol_desc_start=ms_info.addr.lba;
 	return vol_desc_start;
 }
 
@@ -538,20 +540,20 @@ static unsigned int isofs_get_last_session(struct super_block *sb, s32 session)
  */
 static int isofs_fill_super(struct super_block *s, void *data, int silent)
 {
-	struct buffer_head	      * bh = NULL, *pri_bh = NULL;
-	struct hs_primary_descriptor  * h_pri = NULL;
-	struct iso_primary_descriptor * pri = NULL;
+	struct buffer_head *bh = NULL, *pri_bh = NULL;
+	struct hs_primary_descriptor *h_pri = NULL;
+	struct iso_primary_descriptor *pri = NULL;
 	struct iso_supplementary_descriptor *sec = NULL;
-	struct iso_directory_record   * rootp;
-	int				joliet_level = 0;
-	int				iso_blknum, block;
-	int				orig_zonesize;
-	int				table;
-	unsigned int			vol_desc_start;
-	unsigned long			first_data_zone;
-	struct inode		      * inode;
-	struct iso9660_options		opt;
-	struct isofs_sb_info	      * sbi;
+	struct iso_directory_record *rootp;
+	struct inode *inode;
+	struct iso9660_options opt;
+	struct isofs_sb_info *sbi;
+	unsigned long first_data_zone;
+	int joliet_level = 0;
+	int iso_blknum, block;
+	int orig_zonesize;
+	int table;
+	unsigned int vol_desc_start;
 
 	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
 	if (!sbi)
@@ -577,72 +579,73 @@ static int isofs_fill_super(struct super_block *s, void *data, int silent)
 	vol_desc_start = (opt.sbsector != -1) ?
 		opt.sbsector : isofs_get_last_session(s,opt.session);
 
-  	for (iso_blknum = vol_desc_start+16;
-             iso_blknum < vol_desc_start+100; iso_blknum++)
-	{
-	    struct hs_volume_descriptor   * hdp;
-	    struct iso_volume_descriptor  * vdp;
-
-	    block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits);
-	    if (!(bh = sb_bread(s, block)))
-		goto out_no_read;
-
-	    vdp = (struct iso_volume_descriptor *)bh->b_data;
-	    hdp = (struct hs_volume_descriptor *)bh->b_data;
-	    
-	    /* Due to the overlapping physical location of the descriptors, 
-	     * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure 
-	     * proper identification in this case, we first check for ISO.
-	     */
-	    if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) {
-		if (isonum_711 (vdp->type) == ISO_VD_END)
-		    break;
-		if (isonum_711 (vdp->type) == ISO_VD_PRIMARY) {
-		    if (pri == NULL) {
-			pri = (struct iso_primary_descriptor *)vdp;
-			/* Save the buffer in case we need it ... */
-			pri_bh = bh;
-			bh = NULL;
-		    }
-		}
+	for (iso_blknum = vol_desc_start+16;
+		iso_blknum < vol_desc_start+100; iso_blknum++) {
+		struct hs_volume_descriptor *hdp;
+		struct iso_volume_descriptor  *vdp;
+
+		block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits);
+		if (!(bh = sb_bread(s, block)))
+			goto out_no_read;
+
+		vdp = (struct iso_volume_descriptor *)bh->b_data;
+		hdp = (struct hs_volume_descriptor *)bh->b_data;
+
+		/*
+		 * Due to the overlapping physical location of the descriptors,
+		 * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure
+		 * proper identification in this case, we first check for ISO.
+		 */
+		if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) {
+			if (isonum_711(vdp->type) == ISO_VD_END)
+				break;
+			if (isonum_711(vdp->type) == ISO_VD_PRIMARY) {
+				if (pri == NULL) {
+					pri = (struct iso_primary_descriptor *)vdp;
+					/* Save the buffer in case we need it ... */
+					pri_bh = bh;
+					bh = NULL;
+				}
+			}
 #ifdef CONFIG_JOLIET
-		else if (isonum_711 (vdp->type) == ISO_VD_SUPPLEMENTARY) {
-		    sec = (struct iso_supplementary_descriptor *)vdp;
-		    if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) {
-			if (opt.joliet == 'y') {
-			    if (sec->escape[2] == 0x40) {
-				joliet_level = 1;
-			    } else if (sec->escape[2] == 0x43) {
-				joliet_level = 2;
-			    } else if (sec->escape[2] == 0x45) {
-				joliet_level = 3;
-			    }
-			    printk(KERN_DEBUG"ISO 9660 Extensions: Microsoft Joliet Level %d\n",
-				   joliet_level);
+			else if (isonum_711(vdp->type) == ISO_VD_SUPPLEMENTARY) {
+				sec = (struct iso_supplementary_descriptor *)vdp;
+				if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) {
+					if (opt.joliet == 'y') {
+						if (sec->escape[2] == 0x40)
+							joliet_level = 1;
+						else if (sec->escape[2] == 0x43)
+							joliet_level = 2;
+						else if (sec->escape[2] == 0x45)
+							joliet_level = 3;
+
+						printk(KERN_DEBUG "ISO 9660 Extensions: "
+							"Microsoft Joliet Level %d\n",
+							joliet_level);
+					}
+					goto root_found;
+				} else {
+				/* Unknown supplementary volume descriptor */
+				sec = NULL;
+				}
 			}
-			goto root_found;
-		    } else {
-			/* Unknown supplementary volume descriptor */
-			sec = NULL;
-		    }
-		}
 #endif
-	    } else {
-	        if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) {
-		    if (isonum_711 (hdp->type) != ISO_VD_PRIMARY)
-		        goto out_freebh;
-		
-		    sbi->s_high_sierra = 1;
-		    opt.rock = 'n';
-		    h_pri = (struct hs_primary_descriptor *)vdp;
-		    goto root_found;
+		} else {
+			if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) {
+				if (isonum_711(hdp->type) != ISO_VD_PRIMARY)
+					goto out_freebh;
+
+				sbi->s_high_sierra = 1;
+				opt.rock = 'n';
+				h_pri = (struct hs_primary_descriptor *)vdp;
+				goto root_found;
+			}
 		}
-	    }
 
-            /* Just skip any volume descriptors we don't recognize */
+		/* Just skip any volume descriptors we don't recognize */
 
-	    brelse(bh);
-	    bh = NULL;
+		brelse(bh);
+		bh = NULL;
 	}
 	/*
 	 * If we fall through, either no volume descriptor was found,
@@ -657,24 +660,24 @@ static int isofs_fill_super(struct super_block *s, void *data, int silent)
 root_found:
 
 	if (joliet_level && (pri == NULL || opt.rock == 'n')) {
-	    /* This is the case of Joliet with the norock mount flag.
-	     * A disc with both Joliet and Rock Ridge is handled later
-	     */
-	    pri = (struct iso_primary_descriptor *) sec;
+		/* This is the case of Joliet with the norock mount flag.
+		 * A disc with both Joliet and Rock Ridge is handled later
+		 */
+		pri = (struct iso_primary_descriptor *) sec;
 	}
 
 	if(sbi->s_high_sierra){
-	  rootp = (struct iso_directory_record *) h_pri->root_directory_record;
-	  sbi->s_nzones = isonum_733 (h_pri->volume_space_size);
-	  sbi->s_log_zone_size = isonum_723 (h_pri->logical_block_size);
-	  sbi->s_max_size = isonum_733(h_pri->volume_space_size);
+		rootp = (struct iso_directory_record *) h_pri->root_directory_record;
+		sbi->s_nzones = isonum_733(h_pri->volume_space_size);
+		sbi->s_log_zone_size = isonum_723(h_pri->logical_block_size);
+		sbi->s_max_size = isonum_733(h_pri->volume_space_size);
 	} else {
-	  if (!pri)
-	    goto out_freebh;
-	  rootp = (struct iso_directory_record *) pri->root_directory_record;
-	  sbi->s_nzones = isonum_733 (pri->volume_space_size);
-	  sbi->s_log_zone_size = isonum_723 (pri->logical_block_size);
-	  sbi->s_max_size = isonum_733(pri->volume_space_size);
+		if (!pri)
+			goto out_freebh;
+		rootp = (struct iso_directory_record *) pri->root_directory_record;
+		sbi->s_nzones = isonum_733(pri->volume_space_size);
+		sbi->s_log_zone_size = isonum_723(pri->logical_block_size);
+		sbi->s_max_size = isonum_733(pri->volume_space_size);
 	}
 
 	sbi->s_ninodes = 0; /* No way to figure this out easily */
@@ -687,42 +690,43 @@ root_found:
 	 * blocks that were 512 bytes (which should only very rarely
 	 * happen.)
 	 */
-	if(orig_zonesize < opt.blocksize)
+	if (orig_zonesize < opt.blocksize)
 		goto out_bad_size;
 
 	/* RDE: convert log zone size to bit shift */
-	switch (sbi->s_log_zone_size)
-	  { case  512: sbi->s_log_zone_size =  9; break;
-	    case 1024: sbi->s_log_zone_size = 10; break;
-	    case 2048: sbi->s_log_zone_size = 11; break;
+	switch (sbi->s_log_zone_size) {
+	case  512: sbi->s_log_zone_size =  9; break;
+	case 1024: sbi->s_log_zone_size = 10; break;
+	case 2048: sbi->s_log_zone_size = 11; break;
 
-	    default:
+	default:
 		goto out_bad_zone_size;
-	  }
+	}
 
 	s->s_magic = ISOFS_SUPER_MAGIC;
 	s->s_maxbytes = 0xffffffff; /* We can handle files up to 4 GB */
 
-	/* The CDROM is read-only, has no nodes (devices) on it, and since
-	   all of the files appear to be owned by root, we really do not want
-	   to allow suid.  (suid or devices will not show up unless we have
-	   Rock Ridge extensions) */
+	/*
+	 * The CDROM is read-only, has no nodes (devices) on it, and since
+	 * all of the files appear to be owned by root, we really do not want
+	 * to allow suid.  (suid or devices will not show up unless we have
+	 * Rock Ridge extensions)
+	 */
 
 	s->s_flags |= MS_RDONLY /* | MS_NODEV | MS_NOSUID */;
 
 	/* Set this for reference. Its not currently used except on write
 	   which we don't have .. */
-	   
-	first_data_zone = isonum_733 (rootp->extent) +
-			  isonum_711 (rootp->ext_attr_length);
+
+	first_data_zone = isonum_733(rootp->extent) +
+			  isonum_711(rootp->ext_attr_length);
 	sbi->s_firstdatazone = first_data_zone;
 #ifndef BEQUIET
-	printk(KERN_DEBUG "Max size:%ld   Log zone size:%ld\n",
-	       sbi->s_max_size,
-	       1UL << sbi->s_log_zone_size);
-	printk(KERN_DEBUG "First datazone:%ld\n", sbi->s_firstdatazone);
+	printk(KERN_DEBUG "ISOFS: Max size:%ld   Log zone size:%ld\n",
+		sbi->s_max_size, 1UL << sbi->s_log_zone_size);
+	printk(KERN_DEBUG "ISOFS: First datazone:%ld\n", sbi->s_firstdatazone);
 	if(sbi->s_high_sierra)
-		printk(KERN_DEBUG "Disc in High Sierra format.\n");
+		printk(KERN_DEBUG "ISOFS: Disc in High Sierra format.\n");
 #endif
 
 	/*
@@ -737,8 +741,8 @@ root_found:
 		pri = (struct iso_primary_descriptor *) sec;
 		rootp = (struct iso_directory_record *)
 			pri->root_directory_record;
-		first_data_zone = isonum_733 (rootp->extent) +
-			  	isonum_711 (rootp->ext_attr_length);
+		first_data_zone = isonum_733(rootp->extent) +
+				isonum_711(rootp->ext_attr_length);
 	}
 
 	/*
@@ -771,7 +775,7 @@ root_found:
 
 #ifdef CONFIG_JOLIET
 	if (joliet_level && opt.utf8 == 0) {
-		char * p = opt.iocharset ? opt.iocharset : CONFIG_NLS_DEFAULT;
+		char *p = opt.iocharset ? opt.iocharset : CONFIG_NLS_DEFAULT;
 		sbi->s_nls_iocharset = load_nls(p);
 		if (! sbi->s_nls_iocharset) {
 			/* Fail only if explicit charset specified */
@@ -821,7 +825,7 @@ root_found:
 		sbi->s_rock = 0;
 		if (sbi->s_firstdatazone != first_data_zone) {
 			sbi->s_firstdatazone = first_data_zone;
-			printk(KERN_DEBUG 
+			printk(KERN_DEBUG
 				"ISOFS: changing to secondary root\n");
 			iput(inode);
 			inode = isofs_iget(s, sbi->s_firstdatazone, 0);
@@ -830,8 +834,10 @@ root_found:
 
 	if (opt.check == 'u') {
 		/* Only Joliet is case insensitive by default */
-		if (joliet_level) opt.check = 'r';
-		else opt.check = 's';
+		if (joliet_level)
+			opt.check = 'r';
+		else
+			opt.check = 's';
 	}
 	sbi->s_joliet_level = joliet_level;
 
@@ -846,8 +852,10 @@ root_found:
 		goto out_no_root;
 
 	table = 0;
-	if (joliet_level) table += 2;
-	if (opt.check == 'r') table++;
+	if (joliet_level)
+		table += 2;
+	if (opt.check == 'r')
+		table++;
 	s->s_root->d_op = &isofs_dentry_ops[table];
 
 	kfree(opt.iocharset);
@@ -858,10 +866,10 @@ root_found:
 	 * Display error messages and free resources.
 	 */
 out_bad_root:
-	printk(KERN_WARNING "isofs_fill_super: root inode not initialized\n");
+	printk(KERN_WARNING "%s: root inode not initialized\n", __func__);
 	goto out_iput;
 out_no_root:
-	printk(KERN_WARNING "isofs_fill_super: get root inode failed\n");
+	printk(KERN_WARNING "%s: get root inode failed\n", __func__);
 out_iput:
 	iput(inode);
 #ifdef CONFIG_JOLIET
@@ -870,21 +878,20 @@ out_iput:
 #endif
 	goto out_freesbi;
 out_no_read:
-	printk(KERN_WARNING "isofs_fill_super: "
-		"bread failed, dev=%s, iso_blknum=%d, block=%d\n",
-		s->s_id, iso_blknum, block);
+	printk(KERN_WARNING "%s: bread failed, dev=%s, iso_blknum=%d, block=%d\n",
+		__func__, s->s_id, iso_blknum, block);
 	goto out_freesbi;
 out_bad_zone_size:
-	printk(KERN_WARNING "Bad logical zone size %ld\n",
+	printk(KERN_WARNING "ISOFS: Bad logical zone size %ld\n",
 		sbi->s_log_zone_size);
 	goto out_freebh;
 out_bad_size:
-	printk(KERN_WARNING "Logical zone size(%d) < hardware blocksize(%u)\n",
+	printk(KERN_WARNING "ISOFS: Logical zone size(%d) < hardware blocksize(%u)\n",
 		orig_zonesize, opt.blocksize);
 	goto out_freebh;
 out_unknown_format:
 	if (!silent)
-		printk(KERN_WARNING "Unable to identify CD-ROM format.\n");
+		printk(KERN_WARNING "ISOFS: Unable to identify CD-ROM format.\n");
 
 out_freebh:
 	brelse(bh);
@@ -902,7 +909,7 @@ static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf)
 	buf->f_type = ISOFS_SUPER_MAGIC;
 	buf->f_bsize = sb->s_blocksize;
 	buf->f_blocks = (ISOFS_SB(sb)->s_nzones
-                  << (ISOFS_SB(sb)->s_log_zone_size - sb->s_blocksize_bits));
+		<< (ISOFS_SB(sb)->s_log_zone_size - sb->s_blocksize_bits));
 	buf->f_bfree = 0;
 	buf->f_bavail = 0;
 	buf->f_files = ISOFS_SB(sb)->s_ninodes;
@@ -931,20 +938,20 @@ int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
 
 	rv = 0;
 	if (iblock < 0 || iblock != iblock_s) {
-		printk("isofs_get_blocks: block number too large\n");
+		printk(KERN_DEBUG "%s: block number too large\n", __func__);
 		goto abort;
 	}
 
 	b_off = iblock;
-	
-	offset    = 0;
-	firstext  = ei->i_first_extent;
+
+	offset = 0;
+	firstext = ei->i_first_extent;
 	sect_size = ei->i_section_size >> ISOFS_BUFFER_BITS(inode);
-	nextblk   = ei->i_next_section_block;
-	nextoff   = ei->i_next_section_offset;
-	section   = 0;
+	nextblk = ei->i_next_section_block;
+	nextoff = ei->i_next_section_offset;
+	section = 0;
 
-	while ( nblocks ) {
+	while (nblocks) {
 		/* If we are *way* beyond the end of the file, print a message.
 		 * Access beyond the end of the file up to the next page boundary
 		 * is normal, however because of the way the page cache works.
@@ -953,11 +960,11 @@ int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
 		 * I/O errors.
 		 */
 		if (b_off > ((inode->i_size + PAGE_CACHE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) {
-			printk("isofs_get_blocks: block >= EOF (%ld, %ld)\n",
-			       iblock, (unsigned long) inode->i_size);
+			printk(KERN_DEBUG "%s: block >= EOF (%ld, %ld)\n",
+				__func__, iblock, (unsigned long) inode->i_size);
 			goto abort;
 		}
-		
+
 		/* On the last section, nextblk == 0, section size is likely to
 		 * exceed sect_size by a partial block, and access beyond the
 		 * end of the file will reach beyond the section size, too.
@@ -976,20 +983,21 @@ int isofs_get_blocks(struct inode *inode, sector_t iblock_s,
 			iput(ninode);
 
 			if (++section > 100) {
-				printk("isofs_get_blocks: More than 100 file sections ?!?, aborting...\n");
-				printk("isofs_get_blocks: block=%ld firstext=%u sect_size=%u "
-				       "nextblk=%lu nextoff=%lu\n",
-				       iblock, firstext, (unsigned) sect_size,
-				       nextblk, nextoff);
+				printk(KERN_DEBUG "%s: More than 100 file sections ?!?"
+					" aborting...\n", __func__);
+				printk(KERN_DEBUG "%s: block=%ld firstext=%u sect_size=%u "
+					"nextblk=%lu nextoff=%lu\n", __func__,
+					iblock, firstext, (unsigned) sect_size,
+					nextblk, nextoff);
 				goto abort;
 			}
 		}
-		
-		if ( *bh ) {
+
+		if (*bh) {
 			map_bh(*bh, inode->i_sb, firstext + b_off - offset);
 		} else {
 			*bh = sb_getblk(inode->i_sb, firstext+b_off-offset);
-			if ( !*bh )
+			if (!*bh)
 				goto abort;
 		}
 		bh++;	/* Next buffer head */
@@ -1010,7 +1018,7 @@ static int isofs_get_block(struct inode *inode, sector_t iblock,
 		    struct buffer_head *bh_result, int create)
 {
 	if (create) {
-		printk("isofs_get_block: Kernel tries to allocate a block\n");
+		printk(KERN_DEBUG "%s: Kernel tries to allocate a block\n", __func__);
 		return -EROFS;
 	}
 
@@ -1070,11 +1078,11 @@ static int isofs_read_level3_size(struct inode *inode)
 {
 	unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
 	int high_sierra = ISOFS_SB(inode->i_sb)->s_high_sierra;
-	struct buffer_head * bh = NULL;
+	struct buffer_head *bh = NULL;
 	unsigned long block, offset, block_saved, offset_saved;
 	int i = 0;
 	int more_entries = 0;
-	struct iso_directory_record * tmpde = NULL;
+	struct iso_directory_record *tmpde = NULL;
 	struct iso_inode_info *ei = ISOFS_I(inode);
 
 	inode->i_size = 0;
@@ -1089,7 +1097,7 @@ static int isofs_read_level3_size(struct inode *inode)
 	offset = ei->i_iget5_offset;
 
 	do {
-		struct iso_directory_record * de;
+		struct iso_directory_record *de;
 		unsigned int de_len;
 
 		if (!bh) {
@@ -1163,10 +1171,9 @@ out_noread:
 	return -EIO;
 
 out_toomany:
-	printk(KERN_INFO "isofs_read_level3_size: "
-		"More than 100 file sections ?!?, aborting...\n"
-	  	"isofs_read_level3_size: inode=%lu\n",
-		inode->i_ino);
+	printk(KERN_INFO "%s: More than 100 file sections ?!?, aborting...\n"
+		"isofs_read_level3_size: inode=%lu\n",
+		__func__, inode->i_ino);
 	goto out;
 }
 
@@ -1177,9 +1184,9 @@ static void isofs_read_inode(struct inode *inode)
 	unsigned long bufsize = ISOFS_BUFFER_SIZE(inode);
 	unsigned long block;
 	int high_sierra = sbi->s_high_sierra;
-	struct buffer_head * bh = NULL;
-	struct iso_directory_record * de;
-	struct iso_directory_record * tmpde = NULL;
+	struct buffer_head *bh = NULL;
+	struct iso_directory_record *de;
+	struct iso_directory_record *tmpde = NULL;
 	unsigned int de_len;
 	unsigned long offset;
 	struct iso_inode_info *ei = ISOFS_I(inode);
@@ -1199,7 +1206,7 @@ static void isofs_read_inode(struct inode *inode)
 
 		tmpde = kmalloc(de_len, GFP_KERNEL);
 		if (tmpde == NULL) {
-			printk(KERN_INFO "isofs_read_inode: out of memory\n");
+			printk(KERN_INFO "%s: out of memory\n", __func__);
 			goto fail;
 		}
 		memcpy(tmpde, bh->b_data + offset, frag1);
@@ -1212,24 +1219,26 @@ static void isofs_read_inode(struct inode *inode)
 	}
 
 	inode->i_ino = isofs_get_ino(ei->i_iget5_block,
-				     ei->i_iget5_offset,
-				     ISOFS_BUFFER_BITS(inode));
+					ei->i_iget5_offset,
+					ISOFS_BUFFER_BITS(inode));
 
 	/* Assume it is a normal-format file unless told otherwise */
 	ei->i_file_format = isofs_file_normal;
 
 	if (de->flags[-high_sierra] & 2) {
 		inode->i_mode = S_IRUGO | S_IXUGO | S_IFDIR;
-		inode->i_nlink = 1; /* Set to 1.  We know there are 2, but
-				       the find utility tries to optimize
-				       if it is 2, and it screws up.  It is
-				       easier to give 1 which tells find to
-				       do it the hard way. */
+		inode->i_nlink = 1;	/*
+					 * Set to 1.  We know there are 2, but
+					 * the find utility tries to optimize
+					 * if it is 2, and it screws up.  It is
+					 * easier to give 1 which tells find to
+					 * do it the hard way.
+					 */
 	} else {
- 		/* Everybody gets to read the file. */
+		/* Everybody gets to read the file. */
 		inode->i_mode = sbi->s_mode;
 		inode->i_nlink = 1;
-	        inode->i_mode |= S_IFREG;
+		inode->i_mode |= S_IFREG;
 	}
 	inode->i_uid = sbi->s_uid;
 	inode->i_gid = sbi->s_gid;
@@ -1239,13 +1248,14 @@ static void isofs_read_inode(struct inode *inode)
 	ei->i_format_parm[1] = 0;
 	ei->i_format_parm[2] = 0;
 
-	ei->i_section_size = isonum_733 (de->size);
+	ei->i_section_size = isonum_733(de->size);
 	if (de->flags[-high_sierra] & 0x80) {
-		if(isofs_read_level3_size(inode)) goto fail;
+		if(isofs_read_level3_size(inode))
+			goto fail;
 	} else {
 		ei->i_next_section_block = 0;
 		ei->i_next_section_offset = 0;
-		inode->i_size = isonum_733 (de->size);
+		inode->i_size = isonum_733(de->size);
 	}
 
 	/*
@@ -1258,23 +1268,24 @@ static void isofs_read_inode(struct inode *inode)
 		inode->i_size &= 0x00ffffff;
 
 	if (de->interleave[0]) {
-		printk("Interleaved files not (yet) supported.\n");
+		printk(KERN_DEBUG "ISOFS: Interleaved files not (yet) supported.\n");
 		inode->i_size = 0;
 	}
 
 	/* I have no idea what file_unit_size is used for, so
 	   we will flag it for now */
 	if (de->file_unit_size[0] != 0) {
-		printk("File unit size != 0 for ISO file (%ld).\n",
-		       inode->i_ino);
+		printk(KERN_DEBUG "ISOFS: File unit size != 0 for ISO file (%ld).\n",
+			inode->i_ino);
 	}
 
 	/* I have no idea what other flag bits are used for, so
 	   we will flag it for now */
 #ifdef DEBUG
 	if((de->flags[-high_sierra] & ~2)!= 0){
-		printk("Unusual flag settings for ISO file (%ld %x).\n",
-		       inode->i_ino, de->flags[-high_sierra]);
+		printk(KERN_DEBUG "ISOFS: Unusual flag settings for ISO file "
+				"(%ld %x).\n",
+			inode->i_ino, de->flags[-high_sierra]);
 	}
 #endif
 
@@ -1285,11 +1296,11 @@ static void isofs_read_inode(struct inode *inode)
 	inode->i_atime.tv_nsec =
 	inode->i_ctime.tv_nsec = 0;
 
-	ei->i_first_extent = (isonum_733 (de->extent) +
-			      isonum_711 (de->ext_attr_length));
+	ei->i_first_extent = (isonum_733(de->extent) +
+			isonum_711(de->ext_attr_length));
 
 	/* Set the number of blocks for stat() - should be done before RR */
-	inode->i_blocks  = (inode->i_size + 511) >> 9;
+	inode->i_blocks = (inode->i_size + 511) >> 9;
 
 	/*
 	 * Now test for possible Rock Ridge extensions which will override
@@ -1306,7 +1317,7 @@ static void isofs_read_inode(struct inode *inode)
 	/* Install the inode operations vector */
 	if (S_ISREG(inode->i_mode)) {
 		inode->i_fop = &generic_ro_fops;
-		switch ( ei->i_file_format ) {
+		switch (ei->i_file_format) {
 #ifdef CONFIG_ZISOFS
 		case isofs_file_compressed:
 			inode->i_data.a_ops = &zisofs_aops;
@@ -1350,7 +1361,7 @@ static int isofs_iget5_test(struct inode *ino, void *data)
 	struct isofs_iget5_callback_data *d =
 		(struct isofs_iget5_callback_data*)data;
 	return (i->i_iget5_block == d->block)
-	       && (i->i_iget5_offset == d->offset);
+		&& (i->i_iget5_offset == d->offset);
 }
 
 static int isofs_iget5_set(struct inode *ino, void *data)
@@ -1384,7 +1395,7 @@ struct inode *isofs_iget(struct super_block *sb,
 	hashval = (block << sb->s_blocksize_bits) | offset;
 
 	inode = iget5_locked(sb, hashval, &isofs_iget5_test,
-			     &isofs_iget5_set, &data);
+				&isofs_iget5_set, &data);
 
 	if (inode && (inode->i_state & I_NEW)) {
 		sb->s_op->read_inode(inode);
@@ -1398,7 +1409,7 @@ static int isofs_get_sb(struct file_system_type *fs_type,
 	int flags, const char *dev_name, void *data, struct vfsmount *mnt)
 {
 	return get_sb_bdev(fs_type, flags, dev_name, data, isofs_fill_super,
-			   mnt);
+				mnt);
 }
 
 static struct file_system_type iso9660_fs_type = {
diff --git a/fs/isofs/isofs.h b/fs/isofs/isofs.h
index efe2872..a07e67b 100644
--- a/fs/isofs/isofs.h
+++ b/fs/isofs/isofs.h
@@ -1,5 +1,6 @@
 #include <linux/fs.h>
 #include <linux/buffer_head.h>
+#include <linux/exportfs.h>
 #include <linux/iso_fs.h>
 #include <asm/unaligned.h>
 
diff --git a/fs/isofs/joliet.c b/fs/isofs/joliet.c
index fb8fe7a..92c14b8 100644
--- a/fs/isofs/joliet.c
+++ b/fs/isofs/joliet.c
@@ -80,22 +80,20 @@ get_joliet_filename(struct iso_directory_record * de, unsigned char *outname, st
 
 	if (utf8) {
 		len = wcsntombs_be(outname, de->name,
-				   de->name_len[0] >> 1, PAGE_SIZE);
+				de->name_len[0] >> 1, PAGE_SIZE);
 	} else {
 		len = uni16_to_x8(outname, (__be16 *) de->name,
-				  de->name_len[0] >> 1, nls);
+				de->name_len[0] >> 1, nls);
 	}
-	if ((len > 2) && (outname[len-2] == ';') && (outname[len-1] == '1')) {
+	if ((len > 2) && (outname[len-2] == ';') && (outname[len-1] == '1'))
 		len -= 2;
-	}
 
 	/*
 	 * Windows doesn't like periods at the end of a name,
 	 * so neither do we
 	 */
-	while (len >= 2 && (outname[len-1] == '.')) {
+	while (len >= 2 && (outname[len-1] == '.'))
 		len--;
-	}
 
 	return len;
 }
diff --git a/fs/isofs/namei.c b/fs/isofs/namei.c
index c04b3a1..c8c7e51 100644
--- a/fs/isofs/namei.c
+++ b/fs/isofs/namei.c
@@ -15,7 +15,7 @@
  * some sanity tests.
  */
 static int
-isofs_cmp(struct dentry * dentry, const char * compare, int dlen)
+isofs_cmp(struct dentry *dentry, const char *compare, int dlen)
 {
 	struct qstr qstr;
 
@@ -48,24 +48,24 @@ isofs_cmp(struct dentry * dentry, const char * compare, int dlen)
  */
 static unsigned long
 isofs_find_entry(struct inode *dir, struct dentry *dentry,
-	unsigned long *block_rv, unsigned long* offset_rv,
-	char * tmpname, struct iso_directory_record * tmpde)
+	unsigned long *block_rv, unsigned long *offset_rv,
+	char *tmpname, struct iso_directory_record *tmpde)
 {
 	unsigned long bufsize = ISOFS_BUFFER_SIZE(dir);
 	unsigned char bufbits = ISOFS_BUFFER_BITS(dir);
 	unsigned long block, f_pos, offset, block_saved, offset_saved;
-	struct buffer_head * bh = NULL;
+	struct buffer_head *bh = NULL;
 	struct isofs_sb_info *sbi = ISOFS_SB(dir->i_sb);
 
 	if (!ISOFS_I(dir)->i_first_extent)
 		return 0;
-  
+
 	f_pos = 0;
 	offset = 0;
 	block = 0;
 
 	while (f_pos < dir->i_size) {
-		struct iso_directory_record * de;
+		struct iso_directory_record *de;
 		int de_len, match, i, dlen;
 		char *dpnt;
 
@@ -114,7 +114,7 @@ isofs_find_entry(struct inode *dir, struct dentry *dentry,
 
 		if (sbi->s_rock &&
 		    ((i = get_rock_ridge_filename(de, tmpname, dir)))) {
-			dlen = i; 	/* possibly -1 */
+			dlen = i;	/* possibly -1 */
 			dpnt = tmpname;
 #ifdef CONFIG_JOLIET
 		} else if (sbi->s_joliet_level) {
@@ -145,8 +145,8 @@ isofs_find_entry(struct inode *dir, struct dentry *dentry,
 			isofs_normalize_block_and_offset(de,
 							 &block_saved,
 							 &offset_saved);
-                        *block_rv = block_saved;
-                        *offset_rv = offset_saved;
+			*block_rv = block_saved;
+			*offset_rv = offset_saved;
 			brelse(bh);
 			return 1;
 		}
@@ -155,7 +155,7 @@ isofs_find_entry(struct inode *dir, struct dentry *dentry,
 	return 0;
 }
 
-struct dentry *isofs_lookup(struct inode * dir, struct dentry * dentry, struct nameidata *nd)
+struct dentry *isofs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
 {
 	int found;
 	unsigned long block, offset;
@@ -170,9 +170,9 @@ struct dentry *isofs_lookup(struct inode * dir, struct dentry * dentry, struct n
 
 	lock_kernel();
 	found = isofs_find_entry(dir, dentry,
-				 &block, &offset,
-				 page_address(page),
-				 1024 + page_address(page));
+				&block, &offset,
+				page_address(page),
+				1024 + page_address(page));
 	__free_page(page);
 
 	inode = NULL;
diff --git a/fs/jbd/commit.c b/fs/jbd/commit.c
index 1facfaf..a003d50 100644
--- a/fs/jbd/commit.c
+++ b/fs/jbd/commit.c
@@ -887,7 +887,8 @@ restart_loop:
 	journal->j_committing_transaction = NULL;
 	spin_unlock(&journal->j_state_lock);
 
-	if (commit_transaction->t_checkpoint_list == NULL) {
+	if (commit_transaction->t_checkpoint_list == NULL &&
+	    commit_transaction->t_checkpoint_io_list == NULL) {
 		__journal_drop_transaction(journal, commit_transaction);
 	} else {
 		if (journal->j_checkpoint_transactions == NULL) {
diff --git a/fs/jbd/revoke.c b/fs/jbd/revoke.c
index 824e3b7..8db2fa2 100644
--- a/fs/jbd/revoke.c
+++ b/fs/jbd/revoke.c
@@ -68,6 +68,7 @@
 #include <linux/list.h>
 #include <linux/init.h>
 #endif
+#include <linux/log2.h>
 
 static struct kmem_cache *revoke_record_cache;
 static struct kmem_cache *revoke_table_cache;
@@ -211,7 +212,7 @@ int journal_init_revoke(journal_t *journal, int hash_size)
 	journal->j_revoke = journal->j_revoke_table[0];
 
 	/* Check that the hash_size is a power of two */
-	J_ASSERT ((hash_size & (hash_size-1)) == 0);
+	J_ASSERT(is_power_of_2(hash_size));
 
 	journal->j_revoke->hash_size = hash_size;
 
@@ -238,7 +239,7 @@ int journal_init_revoke(journal_t *journal, int hash_size)
 	journal->j_revoke = journal->j_revoke_table[1];
 
 	/* Check that the hash_size is a power of two */
-	J_ASSERT ((hash_size & (hash_size-1)) == 0);
+	J_ASSERT(is_power_of_2(hash_size));
 
 	journal->j_revoke->hash_size = hash_size;
 
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 2856e110..c0f59d1 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -896,7 +896,8 @@ restart_loop:
 	journal->j_committing_transaction = NULL;
 	spin_unlock(&journal->j_state_lock);
 
-	if (commit_transaction->t_checkpoint_list == NULL) {
+	if (commit_transaction->t_checkpoint_list == NULL &&
+	    commit_transaction->t_checkpoint_io_list == NULL) {
 		__jbd2_journal_drop_transaction(journal, commit_transaction);
 	} else {
 		if (journal->j_checkpoint_transactions == NULL) {
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 78d63b8..f290cb7 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -35,6 +35,7 @@
 #include <linux/kthread.h>
 #include <linux/poison.h>
 #include <linux/proc_fs.h>
+#include <linux/debugfs.h>
 
 #include <asm/uaccess.h>
 #include <asm/page.h>
@@ -528,7 +529,7 @@ int jbd2_log_wait_commit(journal_t *journal, tid_t tid)
 {
 	int err = 0;
 
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
 	spin_lock(&journal->j_state_lock);
 	if (!tid_geq(journal->j_commit_request, tid)) {
 		printk(KERN_EMERG
@@ -1709,7 +1710,7 @@ void jbd2_slab_free(void *ptr,  size_t size)
  * Journal_head storage management
  */
 static struct kmem_cache *jbd2_journal_head_cache;
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
 static atomic_t nr_journal_heads = ATOMIC_INIT(0);
 #endif
 
@@ -1747,7 +1748,7 @@ static struct journal_head *journal_alloc_journal_head(void)
 	struct journal_head *ret;
 	static unsigned long last_warning;
 
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
 	atomic_inc(&nr_journal_heads);
 #endif
 	ret = kmem_cache_alloc(jbd2_journal_head_cache, GFP_NOFS);
@@ -1768,7 +1769,7 @@ static struct journal_head *journal_alloc_journal_head(void)
 
 static void journal_free_journal_head(struct journal_head *jh)
 {
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
 	atomic_dec(&nr_journal_heads);
 	memset(jh, JBD_POISON_FREE, sizeof(*jh));
 #endif
@@ -1951,64 +1952,50 @@ void jbd2_journal_put_journal_head(struct journal_head *jh)
 }
 
 /*
- * /proc tunables
+ * debugfs tunables
  */
-#if defined(CONFIG_JBD_DEBUG)
-int jbd2_journal_enable_debug;
+#if defined(CONFIG_JBD2_DEBUG)
+u8 jbd2_journal_enable_debug;
 EXPORT_SYMBOL(jbd2_journal_enable_debug);
 #endif
 
-#if defined(CONFIG_JBD_DEBUG) && defined(CONFIG_PROC_FS)
+#if defined(CONFIG_JBD2_DEBUG) && defined(CONFIG_DEBUG_FS)
 
-static struct proc_dir_entry *proc_jbd_debug;
+#define JBD2_DEBUG_NAME "jbd2-debug"
 
-static int read_jbd_debug(char *page, char **start, off_t off,
-			  int count, int *eof, void *data)
-{
-	int ret;
+struct dentry *jbd2_debugfs_dir, *jbd2_debug;
 
-	ret = sprintf(page + off, "%d\n", jbd2_journal_enable_debug);
-	*eof = 1;
-	return ret;
+static void __init jbd2_create_debugfs_entry(void)
+{
+	jbd2_debugfs_dir = debugfs_create_dir("jbd2", NULL);
+	if (jbd2_debugfs_dir)
+		jbd2_debug = debugfs_create_u8(JBD2_DEBUG_NAME, S_IRUGO,
+					       jbd2_debugfs_dir,
+					       &jbd2_journal_enable_debug);
 }
 
-static int write_jbd_debug(struct file *file, const char __user *buffer,
-			   unsigned long count, void *data)
+static void __exit jbd2_remove_debugfs_entry(void)
 {
-	char buf[32];
-
-	if (count > ARRAY_SIZE(buf) - 1)
-		count = ARRAY_SIZE(buf) - 1;
-	if (copy_from_user(buf, buffer, count))
-		return -EFAULT;
-	buf[ARRAY_SIZE(buf) - 1] = '\0';
-	jbd2_journal_enable_debug = simple_strtoul(buf, NULL, 10);
-	return count;
+	if (jbd2_debug)
+		debugfs_remove(jbd2_debug);
+	if (jbd2_debugfs_dir)
+		debugfs_remove(jbd2_debugfs_dir);
 }
 
-#define JBD_PROC_NAME "sys/fs/jbd2-debug"
+#else
 
-static void __init create_jbd_proc_entry(void)
+static void __init jbd2_create_debugfs_entry(void)
 {
-	proc_jbd_debug = create_proc_entry(JBD_PROC_NAME, 0644, NULL);
-	if (proc_jbd_debug) {
-		/* Why is this so hard? */
-		proc_jbd_debug->read_proc = read_jbd_debug;
-		proc_jbd_debug->write_proc = write_jbd_debug;
-	}
+	do {
+	} while (0);
 }
 
-static void __exit jbd2_remove_jbd_proc_entry(void)
+static void __exit jbd2_remove_debugfs_entry(void)
 {
-	if (proc_jbd_debug)
-		remove_proc_entry(JBD_PROC_NAME, NULL);
+	do {
+	} while (0);
 }
 
-#else
-
-#define create_jbd_proc_entry() do {} while (0)
-#define jbd2_remove_jbd_proc_entry() do {} while (0)
-
 #endif
 
 struct kmem_cache *jbd2_handle_cache;
@@ -2067,18 +2054,18 @@ static int __init journal_init(void)
 	ret = journal_init_caches();
 	if (ret != 0)
 		jbd2_journal_destroy_caches();
-	create_jbd_proc_entry();
+	jbd2_create_debugfs_entry();
 	return ret;
 }
 
 static void __exit journal_exit(void)
 {
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
 	int n = atomic_read(&nr_journal_heads);
 	if (n)
 		printk(KERN_EMERG "JBD: leaked %d journal_heads!\n", n);
 #endif
-	jbd2_remove_jbd_proc_entry();
+	jbd2_remove_debugfs_entry();
 	jbd2_journal_destroy_caches();
 }
 
diff --git a/fs/jbd2/recovery.c b/fs/jbd2/recovery.c
index 395c92a..e7730a0 100644
--- a/fs/jbd2/recovery.c
+++ b/fs/jbd2/recovery.c
@@ -295,7 +295,7 @@ int jbd2_journal_skip_recovery(journal_t *journal)
 		printk(KERN_ERR "JBD: error %d scanning journal\n", err);
 		++journal->j_transaction_sequence;
 	} else {
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
 		int dropped = info.end_transaction - be32_to_cpu(sb->s_sequence);
 #endif
 		jbd_debug(0,
diff --git a/fs/jbd2/revoke.c b/fs/jbd2/revoke.c
index 9246e76..28cac04 100644
--- a/fs/jbd2/revoke.c
+++ b/fs/jbd2/revoke.c
@@ -68,6 +68,7 @@
 #include <linux/list.h>
 #include <linux/init.h>
 #endif
+#include <linux/log2.h>
 
 static struct kmem_cache *jbd2_revoke_record_cache;
 static struct kmem_cache *jbd2_revoke_table_cache;
@@ -212,7 +213,7 @@ int jbd2_journal_init_revoke(journal_t *journal, int hash_size)
 	journal->j_revoke = journal->j_revoke_table[0];
 
 	/* Check that the hash_size is a power of two */
-	J_ASSERT ((hash_size & (hash_size-1)) == 0);
+	J_ASSERT(is_power_of_2(hash_size));
 
 	journal->j_revoke->hash_size = hash_size;
 
@@ -239,7 +240,7 @@ int jbd2_journal_init_revoke(journal_t *journal, int hash_size)
 	journal->j_revoke = journal->j_revoke_table[1];
 
 	/* Check that the hash_size is a power of two */
-	J_ASSERT ((hash_size & (hash_size-1)) == 0);
+	J_ASSERT(is_power_of_2(hash_size));
 
 	journal->j_revoke->hash_size = hash_size;
 
diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c
index a46101e..65b3a1b 100644
--- a/fs/jffs2/acl.c
+++ b/fs/jffs2/acl.c
@@ -435,7 +435,7 @@ static int jffs2_acl_setxattr(struct inode *inode, int type, const void *value,
 	struct posix_acl *acl;
 	int rc;
 
-	if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+	if (!is_owner_or_cap(inode))
 		return -EPERM;
 
 	if (value) {
diff --git a/fs/jffs2/background.c b/fs/jffs2/background.c
index 0c82dfc..143c553 100644
--- a/fs/jffs2/background.c
+++ b/fs/jffs2/background.c
@@ -81,6 +81,7 @@ static int jffs2_garbage_collect_thread(void *_c)
 
 	set_user_nice(current, 10);
 
+	set_freezable();
 	for (;;) {
 		allow_signal(SIGHUP);
 
diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index 9987127..c253019 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -47,7 +47,7 @@ const struct file_operations jffs2_file_operations =
 	.ioctl =	jffs2_ioctl,
 	.mmap =		generic_file_readonly_mmap,
 	.fsync =	jffs2_fsync,
-	.sendfile =	generic_file_sendfile
+	.splice_read =	generic_file_splice_read,
 };
 
 /* jffs2_file_inode_operations */
diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index 12e83f6..7b36378 100644
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -210,8 +210,7 @@ static void jffs2_kill_tn(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info *
  * offset, and the one with the smallest length will come first in the
  * ordering.
  *
- * Returns 0 if the node was inserted
- *         1 if the node is obsolete (because we can't mark it so yet)
+ * Returns 0 if the node was handled (including marking it obsolete)
  *         < 0 an if error occurred
  */
 static int jffs2_add_tn_to_tree(struct jffs2_sb_info *c,
@@ -572,8 +571,7 @@ static struct jffs2_raw_node_ref *jffs2_first_valid_node(struct jffs2_raw_node_r
  * Helper function for jffs2_get_inode_nodes().
  * It is called every time an directory entry node is found.
  *
- * Returns: 0 on succes;
- * 	    1 if the node should be marked obsolete;
+ * Returns: 0 on success;
  * 	    negative error code on failure.
  */
 static inline int read_direntry(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *ref,
@@ -680,8 +678,7 @@ static inline int read_direntry(struct jffs2_sb_info *c, struct jffs2_raw_node_r
  * Helper function for jffs2_get_inode_nodes().
  * It is called every time an inode node is found.
  *
- * Returns: 0 on success;
- * 	    1 if the node should be marked obsolete;
+ * Returns: 0 on success (possibly after marking a bad node obsolete);
  * 	    negative error code on failure.
  */
 static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *ref,
@@ -690,7 +687,7 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
 {
 	struct jffs2_tmp_dnode_info *tn;
 	uint32_t len, csize;
-	int ret = 1;
+	int ret = 0;
 	uint32_t crc;
 
 	/* Obsoleted. This cannot happen, surely? dwmw2 20020308 */
@@ -719,8 +716,9 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
 		/* Sanity checks */
 		if (unlikely(je32_to_cpu(rd->offset) > je32_to_cpu(rd->isize)) ||
 		    unlikely(PAD(je32_to_cpu(rd->csize) + sizeof(*rd)) != PAD(je32_to_cpu(rd->totlen)))) {
-				JFFS2_WARNING("inode node header CRC is corrupted at %#08x\n", ref_offset(ref));
-				jffs2_dbg_dump_node(c, ref_offset(ref));
+			JFFS2_WARNING("inode node header CRC is corrupted at %#08x\n", ref_offset(ref));
+			jffs2_dbg_dump_node(c, ref_offset(ref));
+			jffs2_mark_node_obsolete(c, ref);
 			goto free_out;
 		}
 
@@ -775,6 +773,7 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
 			if (len >= csize && unlikely(tn->partial_crc != je32_to_cpu(rd->data_crc))) {
 				JFFS2_NOTICE("wrong data CRC in data node at 0x%08x: read %#08x, calculated %#08x.\n",
 					ref_offset(ref), tn->partial_crc, je32_to_cpu(rd->data_crc));
+				jffs2_mark_node_obsolete(c, ref);
 				goto free_out;
 			}
 
@@ -854,7 +853,6 @@ static inline int read_dnode(struct jffs2_sb_info *c, struct jffs2_raw_node_ref
  * It is called every time an unknown node is found.
  *
  * Returns: 0 on success;
- * 	    1 if the node should be marked obsolete;
  * 	    negative error code on failure.
  */
 static inline int read_unknown(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *ref, struct jffs2_unknown_node *un)
@@ -1088,10 +1086,7 @@ static int jffs2_get_inode_nodes(struct jffs2_sb_info *c, struct jffs2_inode_inf
 			}
 
 			err = read_unknown(c, ref, &node->u);
-			if (err == 1) {
-				jffs2_mark_node_obsolete(c, ref);
-				break;
-			} else if (unlikely(err))
+			if (unlikely(err))
 				goto free_out;
 
 		}
diff --git a/fs/jfs/endian24.h b/fs/jfs/endian24.h
index 79494c4..fa92f7f1 100644
--- a/fs/jfs/endian24.h
+++ b/fs/jfs/endian24.h
@@ -29,7 +29,7 @@
 	__u32 __x = (x); \
 	((__u32)( \
 		((__x & (__u32)0x000000ffUL) << 16) | \
-		 (__x & (__u32)0x0000ff00UL)        | \
+		 (__x & (__u32)0x0000ff00UL)	    | \
 		((__x & (__u32)0x00ff0000UL) >> 16) )); \
 })
 
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index f7f8eff..87eb936 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -108,7 +108,6 @@ const struct file_operations jfs_file_operations = {
 	.aio_read	= generic_file_aio_read,
 	.aio_write	= generic_file_aio_write,
 	.mmap		= generic_file_mmap,
-	.sendfile	= generic_file_sendfile,
 	.splice_read	= generic_file_splice_read,
 	.splice_write	= generic_file_splice_write,
 	.fsync		= jfs_fsync,
diff --git a/fs/jfs/ioctl.c b/fs/jfs/ioctl.c
index fe063af..3c8663b 100644
--- a/fs/jfs/ioctl.c
+++ b/fs/jfs/ioctl.c
@@ -69,7 +69,7 @@ int jfs_ioctl(struct inode * inode, struct file * filp, unsigned int cmd,
 		if (IS_RDONLY(inode))
 			return -EROFS;
 
-		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+		if (!is_owner_or_cap(inode))
 			return -EACCES;
 
 		if (get_user(flags, (int __user *) arg))
diff --git a/fs/jfs/jfs_debug.c b/fs/jfs/jfs_debug.c
index 9c5d596..887f575 100644
--- a/fs/jfs/jfs_debug.c
+++ b/fs/jfs/jfs_debug.c
@@ -26,34 +26,6 @@
 #include "jfs_filsys.h"
 #include "jfs_debug.h"
 
-#ifdef CONFIG_JFS_DEBUG
-void dump_mem(char *label, void *data, int length)
-{
-	int i, j;
-	int *intptr = data;
-	char *charptr = data;
-	char buf[10], line[80];
-
-	printk("%s: dump of %d bytes of data at 0x%p\n\n", label, length,
-	       data);
-	for (i = 0; i < length; i += 16) {
-		line[0] = 0;
-		for (j = 0; (j < 4) && (i + j * 4 < length); j++) {
-			sprintf(buf, " %08x", intptr[i / 4 + j]);
-			strcat(line, buf);
-		}
-		buf[0] = ' ';
-		buf[2] = 0;
-		for (j = 0; (j < 16) && (i + j < length); j++) {
-			buf[1] =
-			    isprint(charptr[i + j]) ? charptr[i + j] : '.';
-			strcat(line, buf);
-		}
-		printk("%s\n", line);
-	}
-}
-#endif
-
 #ifdef PROC_FS_JFS /* see jfs_debug.h */
 
 static struct proc_dir_entry *base;
diff --git a/fs/jfs/jfs_debug.h b/fs/jfs/jfs_debug.h
index 7378798..044c1e6 100644
--- a/fs/jfs/jfs_debug.h
+++ b/fs/jfs/jfs_debug.h
@@ -62,7 +62,6 @@ extern void jfs_proc_clean(void);
 
 extern int jfsloglevel;
 
-extern void dump_mem(char *label, void *data, int length);
 extern int jfs_txanchor_read(char *, char **, off_t, int, int *, void *);
 
 /* information message: e.g., configuration, major event */
@@ -94,7 +93,6 @@ extern int jfs_txanchor_read(char *, char **, off_t, int, int *, void *);
  *	---------
  */
 #else				/* CONFIG_JFS_DEBUG */
-#define dump_mem(label,data,length) do {} while (0)
 #define ASSERT(p) do {} while (0)
 #define jfs_info(fmt, arg...) do {} while (0)
 #define jfs_debug(fmt, arg...) do {} while (0)
diff --git a/fs/jfs/jfs_dinode.h b/fs/jfs/jfs_dinode.h
index 40b2011..c387540 100644
--- a/fs/jfs/jfs_dinode.h
+++ b/fs/jfs/jfs_dinode.h
@@ -19,23 +19,23 @@
 #define _H_JFS_DINODE
 
 /*
- *      jfs_dinode.h: on-disk inode manager
+ *	jfs_dinode.h: on-disk inode manager
  */
 
-#define INODESLOTSIZE           128
-#define L2INODESLOTSIZE         7
-#define log2INODESIZE           9	/* log2(bytes per dinode) */
+#define INODESLOTSIZE		128
+#define L2INODESLOTSIZE		7
+#define log2INODESIZE		9	/* log2(bytes per dinode) */
 
 
 /*
- *      on-disk inode : 512 bytes
+ *	on-disk inode : 512 bytes
  *
  * note: align 64-bit fields on 8-byte boundary.
  */
 struct dinode {
 	/*
-	 *      I. base area (128 bytes)
-	 *      ------------------------
+	 *	I. base area (128 bytes)
+	 *	------------------------
 	 *
 	 * define generic/POSIX attributes
 	 */
@@ -70,16 +70,16 @@ struct dinode {
 	__le32 di_acltype;	/* 4: Type of ACL */
 
 	/*
-	 *      Extension Areas.
+	 *	Extension Areas.
 	 *
-	 *      Historically, the inode was partitioned into 4 128-byte areas,
-	 *      the last 3 being defined as unions which could have multiple
-	 *      uses.  The first 96 bytes had been completely unused until
-	 *      an index table was added to the directory.  It is now more
-	 *      useful to describe the last 3/4 of the inode as a single
-	 *      union.  We would probably be better off redesigning the
-	 *      entire structure from scratch, but we don't want to break
-	 *      commonality with OS/2's JFS at this time.
+	 *	Historically, the inode was partitioned into 4 128-byte areas,
+	 *	the last 3 being defined as unions which could have multiple
+	 *	uses.  The first 96 bytes had been completely unused until
+	 *	an index table was added to the directory.  It is now more
+	 *	useful to describe the last 3/4 of the inode as a single
+	 *	union.  We would probably be better off redesigning the
+	 *	entire structure from scratch, but we don't want to break
+	 *	commonality with OS/2's JFS at this time.
 	 */
 	union {
 		struct {
@@ -95,7 +95,7 @@ struct dinode {
 		} _dir;					/* (384) */
 #define di_dirtable	u._dir._table
 #define di_dtroot	u._dir._dtroot
-#define di_parent       di_dtroot.header.idotdot
+#define di_parent	di_dtroot.header.idotdot
 #define di_DASD		di_dtroot.header.DASD
 
 		struct {
@@ -127,14 +127,14 @@ struct dinode {
 #define di_inlinedata	u._file._u2._special._u
 #define di_rdev		u._file._u2._special._u._rdev
 #define di_fastsymlink	u._file._u2._special._u._fastsymlink
-#define di_inlineea     u._file._u2._special._inlineea
+#define di_inlineea	u._file._u2._special._inlineea
 	} u;
 };
 
 /* extended mode bits (on-disk inode di_mode) */
-#define IFJOURNAL       0x00010000	/* journalled file */
-#define ISPARSE         0x00020000	/* sparse file enabled */
-#define INLINEEA        0x00040000	/* inline EA area free */
+#define IFJOURNAL	0x00010000	/* journalled file */
+#define ISPARSE		0x00020000	/* sparse file enabled */
+#define INLINEEA	0x00040000	/* inline EA area free */
 #define ISWAPFILE	0x00800000	/* file open for pager swap space */
 
 /* more extended mode bits: attributes for OS/2 */
diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c
index f3b1ebb..e198506 100644
--- a/fs/jfs/jfs_dmap.c
+++ b/fs/jfs/jfs_dmap.c
@@ -154,12 +154,12 @@ static const s8 budtab[256] = {
  *		the in-core descriptor is initialized from disk.
  *
  * PARAMETERS:
- *      ipbmap	-  pointer to in-core inode for the block map.
+ *	ipbmap	- pointer to in-core inode for the block map.
  *
  * RETURN VALUES:
- *      0	- success
- *      -ENOMEM	- insufficient memory
- *      -EIO	- i/o error
+ *	0	- success
+ *	-ENOMEM	- insufficient memory
+ *	-EIO	- i/o error
  */
 int dbMount(struct inode *ipbmap)
 {
@@ -232,11 +232,11 @@ int dbMount(struct inode *ipbmap)
  *		the memory for this descriptor is freed.
  *
  * PARAMETERS:
- *      ipbmap	-  pointer to in-core inode for the block map.
+ *	ipbmap	- pointer to in-core inode for the block map.
  *
  * RETURN VALUES:
- *      0	- success
- *      -EIO	- i/o error
+ *	0	- success
+ *	-EIO	- i/o error
  */
 int dbUnmount(struct inode *ipbmap, int mounterror)
 {
@@ -320,13 +320,13 @@ int dbSync(struct inode *ipbmap)
  *		at a time.
  *
  * PARAMETERS:
- *      ip	-  pointer to in-core inode;
- *      blkno	-  starting block number to be freed.
- *      nblocks	-  number of blocks to be freed.
+ *	ip	- pointer to in-core inode;
+ *	blkno	- starting block number to be freed.
+ *	nblocks	- number of blocks to be freed.
  *
  * RETURN VALUES:
- *      0	- success
- *      -EIO	- i/o error
+ *	0	- success
+ *	-EIO	- i/o error
  */
 int dbFree(struct inode *ip, s64 blkno, s64 nblocks)
 {
@@ -395,23 +395,23 @@ int dbFree(struct inode *ip, s64 blkno, s64 nblocks)
 /*
  * NAME:	dbUpdatePMap()
  *
- * FUNCTION:    update the allocation state (free or allocate) of the
+ * FUNCTION:	update the allocation state (free or allocate) of the
  *		specified block range in the persistent block allocation map.
  *
  *		the blocks will be updated in the persistent map one
  *		dmap at a time.
  *
  * PARAMETERS:
- *      ipbmap	-  pointer to in-core inode for the block map.
- *      free	-  'true' if block range is to be freed from the persistent
- *		   map; 'false' if it is to   be allocated.
- *      blkno	-  starting block number of the range.
- *      nblocks	-  number of contiguous blocks in the range.
- *      tblk	-  transaction block;
+ *	ipbmap	- pointer to in-core inode for the block map.
+ *	free	- 'true' if block range is to be freed from the persistent
+ *		  map; 'false' if it is to be allocated.
+ *	blkno	- starting block number of the range.
+ *	nblocks	- number of contiguous blocks in the range.
+ *	tblk	- transaction block;
  *
  * RETURN VALUES:
- *      0	- success
- *      -EIO	- i/o error
+ *	0	- success
+ *	-EIO	- i/o error
  */
 int
 dbUpdatePMap(struct inode *ipbmap,
@@ -573,7 +573,7 @@ dbUpdatePMap(struct inode *ipbmap,
 /*
  * NAME:	dbNextAG()
  *
- * FUNCTION:    find the preferred allocation group for new allocations.
+ * FUNCTION:	find the preferred allocation group for new allocations.
  *
  *		Within the allocation groups, we maintain a preferred
  *		allocation group which consists of a group with at least
@@ -589,10 +589,10 @@ dbUpdatePMap(struct inode *ipbmap,
  *		empty ags around for large allocations.
  *
  * PARAMETERS:
- *      ipbmap	-  pointer to in-core inode for the block map.
+ *	ipbmap	- pointer to in-core inode for the block map.
  *
  * RETURN VALUES:
- *      the preferred allocation group number.
+ *	the preferred allocation group number.
  */
 int dbNextAG(struct inode *ipbmap)
 {
@@ -656,7 +656,7 @@ unlock:
 /*
  * NAME:	dbAlloc()
  *
- * FUNCTION:    attempt to allocate a specified number of contiguous free
+ * FUNCTION:	attempt to allocate a specified number of contiguous free
  *		blocks from the working allocation block map.
  *
  *		the block allocation policy uses hints and a multi-step
@@ -680,16 +680,16 @@ unlock:
  *		size or requests that specify no hint value.
  *
  * PARAMETERS:
- *      ip	-  pointer to in-core inode;
- *      hint	- allocation hint.
- *      nblocks	- number of contiguous blocks in the range.
- *      results	- on successful return, set to the starting block number
+ *	ip	- pointer to in-core inode;
+ *	hint	- allocation hint.
+ *	nblocks	- number of contiguous blocks in the range.
+ *	results	- on successful return, set to the starting block number
  *		  of the newly allocated contiguous range.
  *
  * RETURN VALUES:
- *      0	- success
- *      -ENOSPC	- insufficient disk resources
- *      -EIO	- i/o error
+ *	0	- success
+ *	-ENOSPC	- insufficient disk resources
+ *	-EIO	- i/o error
  */
 int dbAlloc(struct inode *ip, s64 hint, s64 nblocks, s64 * results)
 {
@@ -706,12 +706,6 @@ int dbAlloc(struct inode *ip, s64 hint, s64 nblocks, s64 * results)
 	/* assert that nblocks is valid */
 	assert(nblocks > 0);
 
-#ifdef _STILL_TO_PORT
-	/* DASD limit check                                     F226941 */
-	if (OVER_LIMIT(ip, nblocks))
-		return -ENOSPC;
-#endif				/* _STILL_TO_PORT */
-
 	/* get the log2 number of blocks to be allocated.
 	 * if the number of blocks is not a log2 multiple,
 	 * it will be rounded up to the next log2 multiple.
@@ -720,7 +714,6 @@ int dbAlloc(struct inode *ip, s64 hint, s64 nblocks, s64 * results)
 
 	bmp = JFS_SBI(ip->i_sb)->bmap;
 
-//retry:        /* serialize w.r.t.extendfs() */
 	mapSize = bmp->db_mapsize;
 
 	/* the hint should be within the map */
@@ -879,17 +872,17 @@ int dbAlloc(struct inode *ip, s64 hint, s64 nblocks, s64 * results)
 /*
  * NAME:	dbAllocExact()
  *
- * FUNCTION:    try to allocate the requested extent;
+ * FUNCTION:	try to allocate the requested extent;
  *
  * PARAMETERS:
- *      ip	- pointer to in-core inode;
- *      blkno	- extent address;
- *      nblocks	- extent length;
+ *	ip	- pointer to in-core inode;
+ *	blkno	- extent address;
+ *	nblocks	- extent length;
  *
  * RETURN VALUES:
- *      0	- success
- *      -ENOSPC	- insufficient disk resources
- *      -EIO	- i/o error
+ *	0	- success
+ *	-ENOSPC	- insufficient disk resources
+ *	-EIO	- i/o error
  */
 int dbAllocExact(struct inode *ip, s64 blkno, int nblocks)
 {
@@ -946,7 +939,7 @@ int dbAllocExact(struct inode *ip, s64 blkno, int nblocks)
 /*
  * NAME:	dbReAlloc()
  *
- * FUNCTION:    attempt to extend a current allocation by a specified
+ * FUNCTION:	attempt to extend a current allocation by a specified
  *		number of blocks.
  *
  *		this routine attempts to satisfy the allocation request
@@ -959,21 +952,21 @@ int dbAllocExact(struct inode *ip, s64 blkno, int nblocks)
  *		number of blocks required.
  *
  * PARAMETERS:
- *      ip	    -  pointer to in-core inode requiring allocation.
- *      blkno	    -  starting block of the current allocation.
- *      nblocks	    -  number of contiguous blocks within the current
+ *	ip	    -  pointer to in-core inode requiring allocation.
+ *	blkno	    -  starting block of the current allocation.
+ *	nblocks	    -  number of contiguous blocks within the current
  *		       allocation.
- *      addnblocks  -  number of blocks to add to the allocation.
- *      results	-      on successful return, set to the starting block number
+ *	addnblocks  -  number of blocks to add to the allocation.
+ *	results	-      on successful return, set to the starting block number
  *		       of the existing allocation if the existing allocation
  *		       was extended in place or to a newly allocated contiguous
  *		       range if the existing allocation could not be extended
  *		       in place.
  *
  * RETURN VALUES:
- *      0	- success
- *      -ENOSPC	- insufficient disk resources
- *      -EIO	- i/o error
+ *	0	- success
+ *	-ENOSPC	- insufficient disk resources
+ *	-EIO	- i/o error
  */
 int
 dbReAlloc(struct inode *ip,
@@ -1004,7 +997,7 @@ dbReAlloc(struct inode *ip,
 /*
  * NAME:	dbExtend()
  *
- * FUNCTION:    attempt to extend a current allocation by a specified
+ * FUNCTION:	attempt to extend a current allocation by a specified
  *		number of blocks.
  *
  *		this routine attempts to satisfy the allocation request
@@ -1013,16 +1006,16 @@ dbReAlloc(struct inode *ip,
  *		immediately following the current allocation.
  *
  * PARAMETERS:
- *      ip	    -  pointer to in-core inode requiring allocation.
- *      blkno	    -  starting block of the current allocation.
- *      nblocks	    -  number of contiguous blocks within the current
+ *	ip	    -  pointer to in-core inode requiring allocation.
+ *	blkno	    -  starting block of the current allocation.
+ *	nblocks	    -  number of contiguous blocks within the current
  *		       allocation.
- *      addnblocks  -  number of blocks to add to the allocation.
+ *	addnblocks  -  number of blocks to add to the allocation.
  *
  * RETURN VALUES:
- *      0	- success
- *      -ENOSPC	- insufficient disk resources
- *      -EIO	- i/o error
+ *	0	- success
+ *	-ENOSPC	- insufficient disk resources
+ *	-EIO	- i/o error
  */
 static int dbExtend(struct inode *ip, s64 blkno, s64 nblocks, s64 addnblocks)
 {
@@ -1109,19 +1102,19 @@ static int dbExtend(struct inode *ip, s64 blkno, s64 nblocks, s64 addnblocks)
 /*
  * NAME:	dbAllocNext()
  *
- * FUNCTION:    attempt to allocate the blocks of the specified block
+ * FUNCTION:	attempt to allocate the blocks of the specified block
  *		range within a dmap.
  *
  * PARAMETERS:
- *      bmp	-  pointer to bmap descriptor
- *      dp	-  pointer to dmap.
- *      blkno	-  starting block number of the range.
- *      nblocks	-  number of contiguous free blocks of the range.
+ *	bmp	-  pointer to bmap descriptor
+ *	dp	-  pointer to dmap.
+ *	blkno	-  starting block number of the range.
+ *	nblocks	-  number of contiguous free blocks of the range.
  *
  * RETURN VALUES:
- *      0	- success
- *      -ENOSPC	- insufficient disk resources
- *      -EIO	- i/o error
+ *	0	- success
+ *	-ENOSPC	- insufficient disk resources
+ *	-EIO	- i/o error
  *
  * serialization: IREAD_LOCK(ipbmap) held on entry/exit;
  */
@@ -1233,7 +1226,7 @@ static int dbAllocNext(struct bmap * bmp, struct dmap * dp, s64 blkno,
 /*
  * NAME:	dbAllocNear()
  *
- * FUNCTION:    attempt to allocate a number of contiguous free blocks near
+ * FUNCTION:	attempt to allocate a number of contiguous free blocks near
  *		a specified block (hint) within a dmap.
  *
  *		starting with the dmap leaf that covers the hint, we'll
@@ -1242,18 +1235,18 @@ static int dbAllocNext(struct bmap * bmp, struct dmap * dp, s64 blkno,
  *		the desired free space.
  *
  * PARAMETERS:
- *      bmp	-  pointer to bmap descriptor
- *      dp	-  pointer to dmap.
- *      blkno	-  block number to allocate near.
- *      nblocks	-  actual number of contiguous free blocks desired.
- *      l2nb	-  log2 number of contiguous free blocks desired.
- *      results	-  on successful return, set to the starting block number
+ *	bmp	-  pointer to bmap descriptor
+ *	dp	-  pointer to dmap.
+ *	blkno	-  block number to allocate near.
+ *	nblocks	-  actual number of contiguous free blocks desired.
+ *	l2nb	-  log2 number of contiguous free blocks desired.
+ *	results	-  on successful return, set to the starting block number
  *		   of the newly allocated range.
  *
  * RETURN VALUES:
- *      0	- success
- *      -ENOSPC	- insufficient disk resources
- *      -EIO	- i/o error
+ *	0	- success
+ *	-ENOSPC	- insufficient disk resources
+ *	-EIO	- i/o error
  *
  * serialization: IREAD_LOCK(ipbmap) held on entry/exit;
  */
@@ -1316,7 +1309,7 @@ dbAllocNear(struct bmap * bmp,
 /*
  * NAME:	dbAllocAG()
  *
- * FUNCTION:    attempt to allocate the specified number of contiguous
+ * FUNCTION:	attempt to allocate the specified number of contiguous
  *		free blocks within the specified allocation group.
  *
  *		unless the allocation group size is equal to the number
@@ -1353,17 +1346,17 @@ dbAllocNear(struct bmap * bmp,
  *		the allocation group.
  *
  * PARAMETERS:
- *      bmp	-  pointer to bmap descriptor
+ *	bmp	-  pointer to bmap descriptor
  *	agno	- allocation group number.
- *      nblocks	-  actual number of contiguous free blocks desired.
- *      l2nb	-  log2 number of contiguous free blocks desired.
- *      results	-  on successful return, set to the starting block number
+ *	nblocks	-  actual number of contiguous free blocks desired.
+ *	l2nb	-  log2 number of contiguous free blocks desired.
+ *	results	-  on successful return, set to the starting block number
  *		   of the newly allocated range.
  *
  * RETURN VALUES:
- *      0	- success
- *      -ENOSPC	- insufficient disk resources
- *      -EIO	- i/o error
+ *	0	- success
+ *	-ENOSPC	- insufficient disk resources
+ *	-EIO	- i/o error
  *
  * note: IWRITE_LOCK(ipmap) held on entry/exit;
  */
@@ -1546,7 +1539,7 @@ dbAllocAG(struct bmap * bmp, int agno, s64 nblocks, int l2nb, s64 * results)
 /*
  * NAME:	dbAllocAny()
  *
- * FUNCTION:    attempt to allocate the specified number of contiguous
+ * FUNCTION:	attempt to allocate the specified number of contiguous
  *		free blocks anywhere in the file system.
  *
  *		dbAllocAny() attempts to find the sufficient free space by
@@ -1556,16 +1549,16 @@ dbAllocAG(struct bmap * bmp, int agno, s64 nblocks, int l2nb, s64 * results)
  *		desired free space is allocated.
  *
  * PARAMETERS:
- *      bmp	-  pointer to bmap descriptor
- *      nblocks	 -  actual number of contiguous free blocks desired.
- *      l2nb	 -  log2 number of contiguous free blocks desired.
- *      results	-  on successful return, set to the starting block number
+ *	bmp	-  pointer to bmap descriptor
+ *	nblocks	 -  actual number of contiguous free blocks desired.
+ *	l2nb	 -  log2 number of contiguous free blocks desired.
+ *	results	-  on successful return, set to the starting block number
  *		   of the newly allocated range.
  *
  * RETURN VALUES:
- *      0	- success
- *      -ENOSPC	- insufficient disk resources
- *      -EIO	- i/o error
+ *	0	- success
+ *	-ENOSPC	- insufficient disk resources
+ *	-EIO	- i/o error
  *
  * serialization: IWRITE_LOCK(ipbmap) held on entry/exit;
  */
@@ -1598,9 +1591,9 @@ static int dbAllocAny(struct bmap * bmp, s64 nblocks, int l2nb, s64 * results)
 /*
  * NAME:	dbFindCtl()
  *
- * FUNCTION:    starting at a specified dmap control page level and block
+ * FUNCTION:	starting at a specified dmap control page level and block
  *		number, search down the dmap control levels for a range of
- *	        contiguous free blocks large enough to satisfy an allocation
+ *		contiguous free blocks large enough to satisfy an allocation
  *		request for the specified number of free blocks.
  *
  *		if sufficient contiguous free blocks are found, this routine
@@ -1609,17 +1602,17 @@ static int dbAllocAny(struct bmap * bmp, s64 nblocks, int l2nb, s64 * results)
  *		is sufficient in size.
  *
  * PARAMETERS:
- *      bmp	-  pointer to bmap descriptor
- *      level	-  starting dmap control page level.
- *      l2nb	-  log2 number of contiguous free blocks desired.
- *      *blkno	-  on entry, starting block number for conducting the search.
+ *	bmp	-  pointer to bmap descriptor
+ *	level	-  starting dmap control page level.
+ *	l2nb	-  log2 number of contiguous free blocks desired.
+ *	*blkno	-  on entry, starting block number for conducting the search.
  *		   on successful return, the first block within a dmap page
  *		   that contains or starts a range of contiguous free blocks.
  *
  * RETURN VALUES:
- *      0	- success
- *      -ENOSPC	- insufficient disk resources
- *      -EIO	- i/o error
+ *	0	- success
+ *	-ENOSPC	- insufficient disk resources
+ *	-EIO	- i/o error
  *
  * serialization: IWRITE_LOCK(ipbmap) held on entry/exit;
  */
@@ -1699,7 +1692,7 @@ static int dbFindCtl(struct bmap * bmp, int l2nb, int level, s64 * blkno)
 /*
  * NAME:	dbAllocCtl()
  *
- * FUNCTION:    attempt to allocate a specified number of contiguous
+ * FUNCTION:	attempt to allocate a specified number of contiguous
  *		blocks starting within a specific dmap.
  *
  *		this routine is called by higher level routines that search
@@ -1726,18 +1719,18 @@ static int dbFindCtl(struct bmap * bmp, int l2nb, int level, s64 * blkno)
  *		first dmap (i.e. blkno).
  *
  * PARAMETERS:
- *      bmp	-  pointer to bmap descriptor
- *      nblocks	 -  actual number of contiguous free blocks to allocate.
- *      l2nb	 -  log2 number of contiguous free blocks to allocate.
- *      blkno	 -  starting block number of the dmap to start the allocation
+ *	bmp	-  pointer to bmap descriptor
+ *	nblocks	 -  actual number of contiguous free blocks to allocate.
+ *	l2nb	 -  log2 number of contiguous free blocks to allocate.
+ *	blkno	 -  starting block number of the dmap to start the allocation
  *		    from.
- *      results	-  on successful return, set to the starting block number
+ *	results	-  on successful return, set to the starting block number
  *		   of the newly allocated range.
  *
  * RETURN VALUES:
- *      0	- success
- *      -ENOSPC	- insufficient disk resources
- *      -EIO	- i/o error
+ *	0	- success
+ *	-ENOSPC	- insufficient disk resources
+ *	-EIO	- i/o error
  *
  * serialization: IWRITE_LOCK(ipbmap) held on entry/exit;
  */
@@ -1870,7 +1863,7 @@ dbAllocCtl(struct bmap * bmp, s64 nblocks, int l2nb, s64 blkno, s64 * results)
 /*
  * NAME:	dbAllocDmapLev()
  *
- * FUNCTION:    attempt to allocate a specified number of contiguous blocks
+ * FUNCTION:	attempt to allocate a specified number of contiguous blocks
  *		from a specified dmap.
  *
  *		this routine checks if the contiguous blocks are available.
@@ -1878,17 +1871,17 @@ dbAllocCtl(struct bmap * bmp, s64 nblocks, int l2nb, s64 blkno, s64 * results)
  *		returned.
  *
  * PARAMETERS:
- *      mp	-  pointer to bmap descriptor
- *      dp	-  pointer to dmap to attempt to allocate blocks from.
- *      l2nb	-  log2 number of contiguous block desired.
- *      nblocks	-  actual number of contiguous block desired.
- *      results	-  on successful return, set to the starting block number
+ *	mp	-  pointer to bmap descriptor
+ *	dp	-  pointer to dmap to attempt to allocate blocks from.
+ *	l2nb	-  log2 number of contiguous block desired.
+ *	nblocks	-  actual number of contiguous block desired.
+ *	results	-  on successful return, set to the starting block number
  *		   of the newly allocated range.
  *
  * RETURN VALUES:
- *      0	- success
- *      -ENOSPC	- insufficient disk resources
- *      -EIO	- i/o error
+ *	0	- success
+ *	-ENOSPC	- insufficient disk resources
+ *	-EIO	- i/o error
  *
  * serialization: IREAD_LOCK(ipbmap), e.g., from dbAlloc(), or
  *	IWRITE_LOCK(ipbmap), e.g., dbAllocCtl(), held on entry/exit;
@@ -1933,7 +1926,7 @@ dbAllocDmapLev(struct bmap * bmp,
 /*
  * NAME:	dbAllocDmap()
  *
- * FUNCTION:    adjust the disk allocation map to reflect the allocation
+ * FUNCTION:	adjust the disk allocation map to reflect the allocation
  *		of a specified block range within a dmap.
  *
  *		this routine allocates the specified blocks from the dmap
@@ -1946,14 +1939,14 @@ dbAllocDmapLev(struct bmap * bmp,
  *		covers this dmap.
  *
  * PARAMETERS:
- *      bmp	-  pointer to bmap descriptor
- *      dp	-  pointer to dmap to allocate the block range from.
- *      blkno	-  starting block number of the block to be allocated.
- *      nblocks	-  number of blocks to be allocated.
+ *	bmp	-  pointer to bmap descriptor
+ *	dp	-  pointer to dmap to allocate the block range from.
+ *	blkno	-  starting block number of the block to be allocated.
+ *	nblocks	-  number of blocks to be allocated.
  *
  * RETURN VALUES:
- *      0	- success
- *      -EIO	- i/o error
+ *	0	- success
+ *	-EIO	- i/o error
  *
  * serialization: IREAD_LOCK(ipbmap) or IWRITE_LOCK(ipbmap) held on entry/exit;
  */
@@ -1989,7 +1982,7 @@ static int dbAllocDmap(struct bmap * bmp, struct dmap * dp, s64 blkno,
 /*
  * NAME:	dbFreeDmap()
  *
- * FUNCTION:    adjust the disk allocation map to reflect the allocation
+ * FUNCTION:	adjust the disk allocation map to reflect the allocation
  *		of a specified block range within a dmap.
  *
  *		this routine frees the specified blocks from the dmap through
@@ -1997,18 +1990,18 @@ static int dbAllocDmap(struct bmap * bmp, struct dmap * dp, s64 blkno,
  *		causes the maximum string of free blocks within the dmap to
  *		change (i.e. the value of the root of the dmap's dmtree), this
  *		routine will cause this change to be reflected up through the
- *	        appropriate levels of the dmap control pages by a call to
+ *		appropriate levels of the dmap control pages by a call to
  *		dbAdjCtl() for the L0 dmap control page that covers this dmap.
  *
  * PARAMETERS:
- *      bmp	-  pointer to bmap descriptor
- *      dp	-  pointer to dmap to free the block range from.
- *      blkno	-  starting block number of the block to be freed.
- *      nblocks	-  number of blocks to be freed.
+ *	bmp	-  pointer to bmap descriptor
+ *	dp	-  pointer to dmap to free the block range from.
+ *	blkno	-  starting block number of the block to be freed.
+ *	nblocks	-  number of blocks to be freed.
  *
  * RETURN VALUES:
- *      0	- success
- *      -EIO	- i/o error
+ *	0	- success
+ *	-EIO	- i/o error
  *
  * serialization: IREAD_LOCK(ipbmap) or IWRITE_LOCK(ipbmap) held on entry/exit;
  */
@@ -2055,7 +2048,7 @@ static int dbFreeDmap(struct bmap * bmp, struct dmap * dp, s64 blkno,
 /*
  * NAME:	dbAllocBits()
  *
- * FUNCTION:    allocate a specified block range from a dmap.
+ * FUNCTION:	allocate a specified block range from a dmap.
  *
  *		this routine updates the dmap to reflect the working
  *		state allocation of the specified block range. it directly
@@ -2065,10 +2058,10 @@ static int dbFreeDmap(struct bmap * bmp, struct dmap * dp, s64 blkno,
  *		dmap's dmtree, as a whole, to reflect the allocated range.
  *
  * PARAMETERS:
- *      bmp	-  pointer to bmap descriptor
- *      dp	-  pointer to dmap to allocate bits from.
- *      blkno	-  starting block number of the bits to be allocated.
- *      nblocks	-  number of bits to be allocated.
+ *	bmp	-  pointer to bmap descriptor
+ *	dp	-  pointer to dmap to allocate bits from.
+ *	blkno	-  starting block number of the bits to be allocated.
+ *	nblocks	-  number of bits to be allocated.
  *
  * RETURN VALUES: none
  *
@@ -2149,7 +2142,7 @@ static void dbAllocBits(struct bmap * bmp, struct dmap * dp, s64 blkno,
 			 * the allocated words.
 			 */
 			for (; nwords > 0; nwords -= nw) {
-			        if (leaf[word] < BUDMIN) {
+				if (leaf[word] < BUDMIN) {
 					jfs_error(bmp->db_ipbmap->i_sb,
 						  "dbAllocBits: leaf page "
 						  "corrupt");
@@ -2202,7 +2195,7 @@ static void dbAllocBits(struct bmap * bmp, struct dmap * dp, s64 blkno,
 /*
  * NAME:	dbFreeBits()
  *
- * FUNCTION:    free a specified block range from a dmap.
+ * FUNCTION:	free a specified block range from a dmap.
  *
  *		this routine updates the dmap to reflect the working
  *		state allocation of the specified block range. it directly
@@ -2212,10 +2205,10 @@ static void dbAllocBits(struct bmap * bmp, struct dmap * dp, s64 blkno,
  *		dmtree, as a whole, to reflect the deallocated range.
  *
  * PARAMETERS:
- *      bmp	-  pointer to bmap descriptor
- *      dp	-  pointer to dmap to free bits from.
- *      blkno	-  starting block number of the bits to be freed.
- *      nblocks	-  number of bits to be freed.
+ *	bmp	-  pointer to bmap descriptor
+ *	dp	-  pointer to dmap to free bits from.
+ *	blkno	-  starting block number of the bits to be freed.
+ *	nblocks	-  number of bits to be freed.
  *
  * RETURN VALUES: 0 for success
  *
@@ -2388,19 +2381,19 @@ static int dbFreeBits(struct bmap * bmp, struct dmap * dp, s64 blkno,
  *		the new root value and the next dmap control page level to
  *		be adjusted.
  * PARAMETERS:
- *      bmp	-  pointer to bmap descriptor
- *      blkno	-  the first block of a block range within a dmap.  it is
+ *	bmp	-  pointer to bmap descriptor
+ *	blkno	-  the first block of a block range within a dmap.  it is
  *		   the allocation or deallocation of this block range that
  *		   requires the dmap control page to be adjusted.
- *      newval	-  the new value of the lower level dmap or dmap control
+ *	newval	-  the new value of the lower level dmap or dmap control
  *		   page root.
- *      alloc	-  'true' if adjustment is due to an allocation.
- *      level	-  current level of dmap control page (i.e. L0, L1, L2) to
+ *	alloc	-  'true' if adjustment is due to an allocation.
+ *	level	-  current level of dmap control page (i.e. L0, L1, L2) to
  *		   be adjusted.
  *
  * RETURN VALUES:
- *      0	- success
- *      -EIO	- i/o error
+ *	0	- success
+ *	-EIO	- i/o error
  *
  * serialization: IREAD_LOCK(ipbmap) or IWRITE_LOCK(ipbmap) held on entry/exit;
  */
@@ -2544,16 +2537,16 @@ dbAdjCtl(struct bmap * bmp, s64 blkno, int newval, int alloc, int level)
 /*
  * NAME:	dbSplit()
  *
- * FUNCTION:    update the leaf of a dmtree with a new value, splitting
+ * FUNCTION:	update the leaf of a dmtree with a new value, splitting
  *		the leaf from the binary buddy system of the dmtree's
  *		leaves, as required.
  *
  * PARAMETERS:
- *      tp	- pointer to the tree containing the leaf.
- *      leafno	- the number of the leaf to be updated.
- *      splitsz	- the size the binary buddy system starting at the leaf
+ *	tp	- pointer to the tree containing the leaf.
+ *	leafno	- the number of the leaf to be updated.
+ *	splitsz	- the size the binary buddy system starting at the leaf
  *		  must be split to, specified as the log2 number of blocks.
- *      newval	- the new value for the leaf.
+ *	newval	- the new value for the leaf.
  *
  * RETURN VALUES: none
  *
@@ -2600,7 +2593,7 @@ static void dbSplit(dmtree_t * tp, int leafno, int splitsz, int newval)
 /*
  * NAME:	dbBackSplit()
  *
- * FUNCTION:    back split the binary buddy system of dmtree leaves
+ * FUNCTION:	back split the binary buddy system of dmtree leaves
  *		that hold a specified leaf until the specified leaf
  *		starts its own binary buddy system.
  *
@@ -2617,8 +2610,8 @@ static void dbSplit(dmtree_t * tp, int leafno, int splitsz, int newval)
  *		in which a previous join operation must be backed out.
  *
  * PARAMETERS:
- *      tp	- pointer to the tree containing the leaf.
- *      leafno	- the number of the leaf to be updated.
+ *	tp	- pointer to the tree containing the leaf.
+ *	leafno	- the number of the leaf to be updated.
  *
  * RETURN VALUES: none
  *
@@ -2692,14 +2685,14 @@ static int dbBackSplit(dmtree_t * tp, int leafno)
 /*
  * NAME:	dbJoin()
  *
- * FUNCTION:    update the leaf of a dmtree with a new value, joining
+ * FUNCTION:	update the leaf of a dmtree with a new value, joining
  *		the leaf with other leaves of the dmtree into a multi-leaf
  *		binary buddy system, as required.
  *
  * PARAMETERS:
- *      tp	- pointer to the tree containing the leaf.
- *      leafno	- the number of the leaf to be updated.
- *      newval	- the new value for the leaf.
+ *	tp	- pointer to the tree containing the leaf.
+ *	leafno	- the number of the leaf to be updated.
+ *	newval	- the new value for the leaf.
  *
  * RETURN VALUES: none
  */
@@ -2785,15 +2778,15 @@ static int dbJoin(dmtree_t * tp, int leafno, int newval)
 /*
  * NAME:	dbAdjTree()
  *
- * FUNCTION:    update a leaf of a dmtree with a new value, adjusting
+ * FUNCTION:	update a leaf of a dmtree with a new value, adjusting
  *		the dmtree, as required, to reflect the new leaf value.
  *		the combination of any buddies must already be done before
  *		this is called.
  *
  * PARAMETERS:
- *      tp	- pointer to the tree to be adjusted.
- *      leafno	- the number of the leaf to be updated.
- *      newval	- the new value for the leaf.
+ *	tp	- pointer to the tree to be adjusted.
+ *	leafno	- the number of the leaf to be updated.
+ *	newval	- the new value for the leaf.
  *
  * RETURN VALUES: none
  */
@@ -2852,7 +2845,7 @@ static void dbAdjTree(dmtree_t * tp, int leafno, int newval)
 /*
  * NAME:	dbFindLeaf()
  *
- * FUNCTION:    search a dmtree_t for sufficient free blocks, returning
+ * FUNCTION:	search a dmtree_t for sufficient free blocks, returning
  *		the index of a leaf describing the free blocks if
  *		sufficient free blocks are found.
  *
@@ -2861,15 +2854,15 @@ static void dbAdjTree(dmtree_t * tp, int leafno, int newval)
  *		free space.
  *
  * PARAMETERS:
- *      tp	- pointer to the tree to be searched.
- *      l2nb	- log2 number of free blocks to search for.
+ *	tp	- pointer to the tree to be searched.
+ *	l2nb	- log2 number of free blocks to search for.
  *	leafidx	- return pointer to be set to the index of the leaf
  *		  describing at least l2nb free blocks if sufficient
  *		  free blocks are found.
  *
  * RETURN VALUES:
- *      0	- success
- *      -ENOSPC	- insufficient free blocks.
+ *	0	- success
+ *	-ENOSPC	- insufficient free blocks.
  */
 static int dbFindLeaf(dmtree_t * tp, int l2nb, int *leafidx)
 {
@@ -2916,18 +2909,18 @@ static int dbFindLeaf(dmtree_t * tp, int l2nb, int *leafidx)
 /*
  * NAME:	dbFindBits()
  *
- * FUNCTION:    find a specified number of binary buddy free bits within a
+ * FUNCTION:	find a specified number of binary buddy free bits within a
  *		dmap bitmap word value.
  *
  *		this routine searches the bitmap value for (1 << l2nb) free
  *		bits at (1 << l2nb) alignments within the value.
  *
  * PARAMETERS:
- *      word	-  dmap bitmap word value.
- *      l2nb	-  number of free bits specified as a log2 number.
+ *	word	-  dmap bitmap word value.
+ *	l2nb	-  number of free bits specified as a log2 number.
  *
  * RETURN VALUES:
- *      starting bit number of free bits.
+ *	starting bit number of free bits.
  */
 static int dbFindBits(u32 word, int l2nb)
 {
@@ -2963,14 +2956,14 @@ static int dbFindBits(u32 word, int l2nb)
 /*
  * NAME:	dbMaxBud(u8 *cp)
  *
- * FUNCTION:    determine the largest binary buddy string of free
+ * FUNCTION:	determine the largest binary buddy string of free
  *		bits within 32-bits of the map.
  *
  * PARAMETERS:
- *      cp	-  pointer to the 32-bit value.
+ *	cp	-  pointer to the 32-bit value.
  *
  * RETURN VALUES:
- *      largest binary buddy of free bits within a dmap word.
+ *	largest binary buddy of free bits within a dmap word.
  */
 static int dbMaxBud(u8 * cp)
 {
@@ -3000,14 +2993,14 @@ static int dbMaxBud(u8 * cp)
 /*
  * NAME:	cnttz(uint word)
  *
- * FUNCTION:    determine the number of trailing zeros within a 32-bit
+ * FUNCTION:	determine the number of trailing zeros within a 32-bit
  *		value.
  *
  * PARAMETERS:
- *      value	-  32-bit value to be examined.
+ *	value	-  32-bit value to be examined.
  *
  * RETURN VALUES:
- *      count of trailing zeros
+ *	count of trailing zeros
  */
 static int cnttz(u32 word)
 {
@@ -3025,14 +3018,14 @@ static int cnttz(u32 word)
 /*
  * NAME:	cntlz(u32 value)
  *
- * FUNCTION:    determine the number of leading zeros within a 32-bit
+ * FUNCTION:	determine the number of leading zeros within a 32-bit
  *		value.
  *
  * PARAMETERS:
- *      value	-  32-bit value to be examined.
+ *	value	-  32-bit value to be examined.
  *
  * RETURN VALUES:
- *      count of leading zeros
+ *	count of leading zeros
  */
 static int cntlz(u32 value)
 {
@@ -3050,14 +3043,14 @@ static int cntlz(u32 value)
  * NAME:	blkstol2(s64 nb)
  *
  * FUNCTION:	convert a block count to its log2 value. if the block
- *	        count is not a l2 multiple, it is rounded up to the next
+ *		count is not a l2 multiple, it is rounded up to the next
  *		larger l2 multiple.
  *
  * PARAMETERS:
- *      nb	-  number of blocks
+ *	nb	-  number of blocks
  *
  * RETURN VALUES:
- *      log2 number of blocks
+ *	log2 number of blocks
  */
 static int blkstol2(s64 nb)
 {
@@ -3099,13 +3092,13 @@ static int blkstol2(s64 nb)
  *		at a time.
  *
  * PARAMETERS:
- *      ip	-  pointer to in-core inode;
- *      blkno	-  starting block number to be freed.
- *      nblocks	-  number of blocks to be freed.
+ *	ip	-  pointer to in-core inode;
+ *	blkno	-  starting block number to be freed.
+ *	nblocks	-  number of blocks to be freed.
  *
  * RETURN VALUES:
- *      0	- success
- *      -EIO	- i/o error
+ *	0	- success
+ *	-EIO	- i/o error
  */
 int dbAllocBottomUp(struct inode *ip, s64 blkno, s64 nblocks)
 {
@@ -3278,10 +3271,10 @@ static int dbAllocDmapBU(struct bmap * bmp, struct dmap * dp, s64 blkno,
  * L2
  *  |
  *   L1---------------------------------L1
- *    |                                  |
- *     L0---------L0---------L0           L0---------L0---------L0
- *      |          |          |            |          |          |
- *       d0,...,dn  d0,...,dn  d0,...,dn    d0,...,dn  d0,...,dn  d0,.,dm;
+ *    |					 |
+ *     L0---------L0---------L0		  L0---------L0---------L0
+ *      |	   |	      |		   |	      |		 |
+ *	 d0,...,dn  d0,...,dn  d0,...,dn    d0,...,dn  d0,...,dn  d0,.,dm;
  * L2L1L0d0,...,dnL0d0,...,dnL0d0,...,dnL1L0d0,...,dnL0d0,...,dnL0d0,..dm
  *
  * <---old---><----------------------------extend----------------------->
@@ -3307,7 +3300,7 @@ int dbExtendFS(struct inode *ipbmap, s64 blkno,	s64 nblocks)
 		 (long long) blkno, (long long) nblocks, (long long) newsize);
 
 	/*
-	 *      initialize bmap control page.
+	 *	initialize bmap control page.
 	 *
 	 * all the data in bmap control page should exclude
 	 * the mkfs hidden dmap page.
@@ -3330,7 +3323,7 @@ int dbExtendFS(struct inode *ipbmap, s64 blkno,	s64 nblocks)
 	bmp->db_numag += ((u32) newsize % (u32) bmp->db_agsize) ? 1 : 0;
 
 	/*
-	 *      reconfigure db_agfree[]
+	 *	reconfigure db_agfree[]
 	 * from old AG configuration to new AG configuration;
 	 *
 	 * coalesce contiguous k (newAGSize/oldAGSize) AGs;
@@ -3362,7 +3355,7 @@ int dbExtendFS(struct inode *ipbmap, s64 blkno,	s64 nblocks)
 	bmp->db_maxag = bmp->db_maxag / k;
 
 	/*
-	 *      extend bmap
+	 *	extend bmap
 	 *
 	 * update bit maps and corresponding level control pages;
 	 * global control page db_nfree, db_agfree[agno], db_maxfreebud;
@@ -3410,7 +3403,7 @@ int dbExtendFS(struct inode *ipbmap, s64 blkno,	s64 nblocks)
 			/* compute start L0 */
 			j = 0;
 			l1leaf = l1dcp->stree + CTLLEAFIND;
-			p += nbperpage;	/* 1st L0 of L1.k  */
+			p += nbperpage;	/* 1st L0 of L1.k */
 		}
 
 		/*
@@ -3548,7 +3541,7 @@ errout:
 	return -EIO;
 
 	/*
-	 *      finalize bmap control page
+	 *	finalize bmap control page
 	 */
 finalize:
 
@@ -3567,7 +3560,7 @@ void dbFinalizeBmap(struct inode *ipbmap)
 	int i, n;
 
 	/*
-	 *      finalize bmap control page
+	 *	finalize bmap control page
 	 */
 //finalize:
 	/*
@@ -3953,8 +3946,8 @@ static int dbGetL2AGSize(s64 nblocks)
  * convert number of map pages to the zero origin top dmapctl level
  */
 #define BMAPPGTOLEV(npages)	\
-	(((npages) <= 3 + MAXL0PAGES) ? 0 \
-       : ((npages) <= 2 + MAXL1PAGES) ? 1 : 2)
+	(((npages) <= 3 + MAXL0PAGES) ? 0 : \
+	 ((npages) <= 2 + MAXL1PAGES) ? 1 : 2)
 
 s64 dbMapFileSizeToMapSize(struct inode * ipbmap)
 {
@@ -3981,8 +3974,8 @@ s64 dbMapFileSizeToMapSize(struct inode * ipbmap)
 		factor =
 		    (i == 2) ? MAXL1PAGES : ((i == 1) ? MAXL0PAGES : 1);
 		complete = (u32) npages / factor;
-		ndmaps += complete * ((i == 2) ? LPERCTL * LPERCTL
-				      : ((i == 1) ? LPERCTL : 1));
+		ndmaps += complete * ((i == 2) ? LPERCTL * LPERCTL :
+				      ((i == 1) ? LPERCTL : 1));
 
 		/* pages in last/incomplete child */
 		npages = (u32) npages % factor;
diff --git a/fs/jfs/jfs_dmap.h b/fs/jfs/jfs_dmap.h
index 45ea454..11e6d47 100644
--- a/fs/jfs/jfs_dmap.h
+++ b/fs/jfs/jfs_dmap.h
@@ -83,7 +83,7 @@ static __inline signed char TREEMAX(signed char *cp)
  *	- 1 is added to account for the control page of the map.
  */
 #define BLKTODMAP(b,s)    \
-        ((((b) >> 13) + ((b) >> 23) + ((b) >> 33) + 3 + 1) << (s))
+	((((b) >> 13) + ((b) >> 23) + ((b) >> 33) + 3 + 1) << (s))
 
 /*
  * convert disk block number to the logical block number of the LEVEL 0
@@ -98,7 +98,7 @@ static __inline signed char TREEMAX(signed char *cp)
  *	- 1 is added to account for the control page of the map.
  */
 #define BLKTOL0(b,s)      \
-        (((((b) >> 23) << 10) + ((b) >> 23) + ((b) >> 33) + 2 + 1) << (s))
+	(((((b) >> 23) << 10) + ((b) >> 23) + ((b) >> 33) + 2 + 1) << (s))
 
 /*
  * convert disk block number to the logical block number of the LEVEL 1
@@ -120,7 +120,7 @@ static __inline signed char TREEMAX(signed char *cp)
  * at the specified level which describes the disk block.
  */
 #define BLKTOCTL(b,s,l)   \
-        (((l) == 2) ? 1 : ((l) == 1) ? BLKTOL1((b),(s)) : BLKTOL0((b),(s)))
+	(((l) == 2) ? 1 : ((l) == 1) ? BLKTOL1((b),(s)) : BLKTOL0((b),(s)))
 
 /*
  * convert aggregate map size to the zero origin dmapctl level of the
@@ -145,27 +145,27 @@ static __inline signed char TREEMAX(signed char *cp)
  * dmaptree must be consistent with dmapctl.
  */
 struct dmaptree {
-	__le32 nleafs;		/* 4: number of tree leafs      */
-	__le32 l2nleafs;	/* 4: l2 number of tree leafs   */
-	__le32 leafidx;		/* 4: index of first tree leaf  */
-	__le32 height;		/* 4: height of the tree        */
+	__le32 nleafs;		/* 4: number of tree leafs	*/
+	__le32 l2nleafs;	/* 4: l2 number of tree leafs	*/
+	__le32 leafidx;		/* 4: index of first tree leaf	*/
+	__le32 height;		/* 4: height of the tree	*/
 	s8 budmin;		/* 1: min l2 tree leaf value to combine */
-	s8 stree[TREESIZE];	/* TREESIZE: tree               */
-	u8 pad[2];		/* 2: pad to word boundary      */
-};				/* - 360 -                      */
+	s8 stree[TREESIZE];	/* TREESIZE: tree		*/
+	u8 pad[2];		/* 2: pad to word boundary	*/
+};				/* - 360 -			*/
 
 /*
  *	dmap page per 8K blocks bitmap
  */
 struct dmap {
-	__le32 nblocks;		/* 4: num blks covered by this dmap     */
-	__le32 nfree;		/* 4: num of free blks in this dmap     */
-	__le64 start;		/* 8: starting blkno for this dmap      */
-	struct dmaptree tree;	/* 360: dmap tree                       */
-	u8 pad[1672];		/* 1672: pad to 2048 bytes              */
-	__le32 wmap[LPERDMAP];	/* 1024: bits of the working map        */
-	__le32 pmap[LPERDMAP];	/* 1024: bits of the persistent map     */
-};				/* - 4096 -                             */
+	__le32 nblocks;		/* 4: num blks covered by this dmap	*/
+	__le32 nfree;		/* 4: num of free blks in this dmap	*/
+	__le64 start;		/* 8: starting blkno for this dmap	*/
+	struct dmaptree tree;	/* 360: dmap tree			*/
+	u8 pad[1672];		/* 1672: pad to 2048 bytes		*/
+	__le32 wmap[LPERDMAP];	/* 1024: bits of the working map	*/
+	__le32 pmap[LPERDMAP];	/* 1024: bits of the persistent map	*/
+};				/* - 4096 -				*/
 
 /*
  *	disk map control page per level.
@@ -173,14 +173,14 @@ struct dmap {
  * dmapctl must be consistent with dmaptree.
  */
 struct dmapctl {
-	__le32 nleafs;		/* 4: number of tree leafs      */
-	__le32 l2nleafs;	/* 4: l2 number of tree leafs   */
-	__le32 leafidx;		/* 4: index of the first tree leaf      */
-	__le32 height;		/* 4: height of tree            */
-	s8 budmin;		/* 1: minimum l2 tree leaf value        */
-	s8 stree[CTLTREESIZE];	/* CTLTREESIZE: dmapctl tree    */
-	u8 pad[2714];		/* 2714: pad to 4096            */
-};				/* - 4096 -                     */
+	__le32 nleafs;		/* 4: number of tree leafs	*/
+	__le32 l2nleafs;	/* 4: l2 number of tree leafs	*/
+	__le32 leafidx;		/* 4: index of the first tree leaf	*/
+	__le32 height;		/* 4: height of tree		*/
+	s8 budmin;		/* 1: minimum l2 tree leaf value	*/
+	s8 stree[CTLTREESIZE];	/* CTLTREESIZE: dmapctl tree	*/
+	u8 pad[2714];		/* 2714: pad to 4096		*/
+};				/* - 4096 -			*/
 
 /*
  *	common definition for dmaptree within dmap and dmapctl
@@ -202,41 +202,41 @@ typedef union dmtree {
  *	on-disk aggregate disk allocation map descriptor.
  */
 struct dbmap_disk {
-	__le64 dn_mapsize;	/* 8: number of blocks in aggregate     */
-	__le64 dn_nfree;	/* 8: num free blks in aggregate map    */
-	__le32 dn_l2nbperpage;	/* 4: number of blks per page           */
-	__le32 dn_numag;	/* 4: total number of ags               */
-	__le32 dn_maxlevel;	/* 4: number of active ags              */
-	__le32 dn_maxag;	/* 4: max active alloc group number     */
-	__le32 dn_agpref;	/* 4: preferred alloc group (hint)      */
-	__le32 dn_aglevel;	/* 4: dmapctl level holding the AG      */
-	__le32 dn_agheigth;	/* 4: height in dmapctl of the AG       */
-	__le32 dn_agwidth;	/* 4: width in dmapctl of the AG        */
-	__le32 dn_agstart;	/* 4: start tree index at AG height     */
-	__le32 dn_agl2size;	/* 4: l2 num of blks per alloc group    */
-	__le64 dn_agfree[MAXAG];/* 8*MAXAG: per AG free count           */
-	__le64 dn_agsize;	/* 8: num of blks per alloc group       */
-	s8 dn_maxfreebud;	/* 1: max free buddy system             */
-	u8 pad[3007];		/* 3007: pad to 4096                    */
-};				/* - 4096 -                             */
+	__le64 dn_mapsize;	/* 8: number of blocks in aggregate	*/
+	__le64 dn_nfree;	/* 8: num free blks in aggregate map	*/
+	__le32 dn_l2nbperpage;	/* 4: number of blks per page		*/
+	__le32 dn_numag;	/* 4: total number of ags		*/
+	__le32 dn_maxlevel;	/* 4: number of active ags		*/
+	__le32 dn_maxag;	/* 4: max active alloc group number	*/
+	__le32 dn_agpref;	/* 4: preferred alloc group (hint)	*/
+	__le32 dn_aglevel;	/* 4: dmapctl level holding the AG	*/
+	__le32 dn_agheigth;	/* 4: height in dmapctl of the AG	*/
+	__le32 dn_agwidth;	/* 4: width in dmapctl of the AG	*/
+	__le32 dn_agstart;	/* 4: start tree index at AG height	*/
+	__le32 dn_agl2size;	/* 4: l2 num of blks per alloc group	*/
+	__le64 dn_agfree[MAXAG];/* 8*MAXAG: per AG free count		*/
+	__le64 dn_agsize;	/* 8: num of blks per alloc group	*/
+	s8 dn_maxfreebud;	/* 1: max free buddy system		*/
+	u8 pad[3007];		/* 3007: pad to 4096			*/
+};				/* - 4096 -				*/
 
 struct dbmap {
-	s64 dn_mapsize;		/* number of blocks in aggregate     */
-	s64 dn_nfree;		/* num free blks in aggregate map    */
-	int dn_l2nbperpage;	/* number of blks per page           */
-	int dn_numag;		/* total number of ags               */
-	int dn_maxlevel;	/* number of active ags              */
-	int dn_maxag;		/* max active alloc group number     */
-	int dn_agpref;		/* preferred alloc group (hint)      */
-	int dn_aglevel;		/* dmapctl level holding the AG      */
-	int dn_agheigth;	/* height in dmapctl of the AG       */
-	int dn_agwidth;		/* width in dmapctl of the AG        */
-	int dn_agstart;		/* start tree index at AG height     */
-	int dn_agl2size;	/* l2 num of blks per alloc group    */
-	s64 dn_agfree[MAXAG];	/* per AG free count           */
-	s64 dn_agsize;		/* num of blks per alloc group       */
-	signed char dn_maxfreebud;	/* max free buddy system             */
-};				/* - 4096 -                             */
+	s64 dn_mapsize;		/* number of blocks in aggregate	*/
+	s64 dn_nfree;		/* num free blks in aggregate map	*/
+	int dn_l2nbperpage;	/* number of blks per page		*/
+	int dn_numag;		/* total number of ags			*/
+	int dn_maxlevel;	/* number of active ags			*/
+	int dn_maxag;		/* max active alloc group number	*/
+	int dn_agpref;		/* preferred alloc group (hint)		*/
+	int dn_aglevel;		/* dmapctl level holding the AG		*/
+	int dn_agheigth;	/* height in dmapctl of the AG		*/
+	int dn_agwidth;		/* width in dmapctl of the AG		*/
+	int dn_agstart;		/* start tree index at AG height	*/
+	int dn_agl2size;	/* l2 num of blks per alloc group	*/
+	s64 dn_agfree[MAXAG];	/* per AG free count			*/
+	s64 dn_agsize;		/* num of blks per alloc group		*/
+	signed char dn_maxfreebud;	/* max free buddy system	*/
+};				/* - 4096 -				*/
 /*
  *	in-memory aggregate disk allocation map descriptor.
  */
diff --git a/fs/jfs/jfs_dtree.c b/fs/jfs/jfs_dtree.c
index 6d62f32..c14ba3c 100644
--- a/fs/jfs/jfs_dtree.c
+++ b/fs/jfs/jfs_dtree.c
@@ -315,8 +315,8 @@ static inline void lock_index(tid_t tid, struct inode *ip, struct metapage * mp,
 	lv = &llck->lv[llck->index];
 
 	/*
-	 *      Linelock slot size is twice the size of directory table
-	 *      slot size.  512 entries per page.
+	 *	Linelock slot size is twice the size of directory table
+	 *	slot size.  512 entries per page.
 	 */
 	lv->offset = ((index - 2) & 511) >> 1;
 	lv->length = 1;
@@ -615,7 +615,7 @@ int dtSearch(struct inode *ip, struct component_name * key, ino_t * data,
 	btstack->nsplit = 1;
 
 	/*
-	 *      search down tree from root:
+	 *	search down tree from root:
 	 *
 	 * between two consecutive entries of <Ki, Pi> and <Kj, Pj> of
 	 * internal page, child page Pi contains entry with k, Ki <= K < Kj.
@@ -659,7 +659,7 @@ int dtSearch(struct inode *ip, struct component_name * key, ino_t * data,
 			}
 			if (cmp == 0) {
 				/*
-				 *      search hit
+				 *	search hit
 				 */
 				/* search hit - leaf page:
 				 * return the entry found
@@ -723,7 +723,7 @@ int dtSearch(struct inode *ip, struct component_name * key, ino_t * data,
 		}
 
 		/*
-		 *      search miss
+		 *	search miss
 		 *
 		 * base is the smallest index with key (Kj) greater than
 		 * search key (K) and may be zero or (maxindex + 1) index.
@@ -834,7 +834,7 @@ int dtInsert(tid_t tid, struct inode *ip,
 	struct lv *lv;
 
 	/*
-	 *      retrieve search result
+	 *	retrieve search result
 	 *
 	 * dtSearch() returns (leaf page pinned, index at which to insert).
 	 * n.b. dtSearch() may return index of (maxindex + 1) of
@@ -843,7 +843,7 @@ int dtInsert(tid_t tid, struct inode *ip,
 	DT_GETSEARCH(ip, btstack->top, bn, mp, p, index);
 
 	/*
-	 *      insert entry for new key
+	 *	insert entry for new key
 	 */
 	if (DO_INDEX(ip)) {
 		if (JFS_IP(ip)->next_index == DIREND) {
@@ -860,9 +860,9 @@ int dtInsert(tid_t tid, struct inode *ip,
 	data.leaf.ino = *fsn;
 
 	/*
-	 *      leaf page does not have enough room for new entry:
+	 *	leaf page does not have enough room for new entry:
 	 *
-	 *      extend/split the leaf page;
+	 *	extend/split the leaf page;
 	 *
 	 * dtSplitUp() will insert the entry and unpin the leaf page.
 	 */
@@ -877,9 +877,9 @@ int dtInsert(tid_t tid, struct inode *ip,
 	}
 
 	/*
-	 *      leaf page does have enough room for new entry:
+	 *	leaf page does have enough room for new entry:
 	 *
-	 *      insert the new data entry into the leaf page;
+	 *	insert the new data entry into the leaf page;
 	 */
 	BT_MARK_DIRTY(mp, ip);
 	/*
@@ -967,13 +967,13 @@ static int dtSplitUp(tid_t tid,
 	}
 
 	/*
-	 *      split leaf page
+	 *	split leaf page
 	 *
 	 * The split routines insert the new entry, and
 	 * acquire txLock as appropriate.
 	 */
 	/*
-	 *      split root leaf page:
+	 *	split root leaf page:
 	 */
 	if (sp->header.flag & BT_ROOT) {
 		/*
@@ -1012,7 +1012,7 @@ static int dtSplitUp(tid_t tid,
 	}
 
 	/*
-	 *      extend first leaf page
+	 *	extend first leaf page
 	 *
 	 * extend the 1st extent if less than buffer page size
 	 * (dtExtendPage() reurns leaf page unpinned)
@@ -1068,7 +1068,7 @@ static int dtSplitUp(tid_t tid,
 	}
 
 	/*
-	 *      split leaf page <sp> into <sp> and a new right page <rp>.
+	 *	split leaf page <sp> into <sp> and a new right page <rp>.
 	 *
 	 * return <rp> pinned and its extent descriptor <rpxd>
 	 */
@@ -1433,7 +1433,7 @@ static int dtSplitPage(tid_t tid, struct inode *ip, struct dtsplit * split,
 	rp->header.freecnt = rp->header.maxslot - fsi;
 
 	/*
-	 *      sequential append at tail: append without split
+	 *	sequential append at tail: append without split
 	 *
 	 * If splitting the last page on a level because of appending
 	 * a entry to it (skip is maxentry), it's likely that the access is
@@ -1467,7 +1467,7 @@ static int dtSplitPage(tid_t tid, struct inode *ip, struct dtsplit * split,
 	}
 
 	/*
-	 *      non-sequential insert (at possibly middle page)
+	 *	non-sequential insert (at possibly middle page)
 	 */
 
 	/*
@@ -1508,7 +1508,7 @@ static int dtSplitPage(tid_t tid, struct inode *ip, struct dtsplit * split,
 	left = 0;
 
 	/*
-	 *      compute fill factor for split pages
+	 *	compute fill factor for split pages
 	 *
 	 * <nxt> traces the next entry to move to rp
 	 * <off> traces the next entry to stay in sp
@@ -1551,7 +1551,7 @@ static int dtSplitPage(tid_t tid, struct inode *ip, struct dtsplit * split,
 	/* <nxt> poins to the 1st entry to move */
 
 	/*
-	 *      move entries to right page
+	 *	move entries to right page
 	 *
 	 * dtMoveEntry() initializes rp and reserves entry for insertion
 	 *
@@ -1677,7 +1677,7 @@ static int dtExtendPage(tid_t tid,
 		return (rc);
 
 	/*
-	 *      extend the extent
+	 *	extend the extent
 	 */
 	pxdlist = split->pxdlist;
 	pxd = &pxdlist->pxd[pxdlist->npxd];
@@ -1722,7 +1722,7 @@ static int dtExtendPage(tid_t tid,
 	}
 
 	/*
-	 *      extend the page
+	 *	extend the page
 	 */
 	sp->header.self = *pxd;
 
@@ -1739,9 +1739,6 @@ static int dtExtendPage(tid_t tid,
 	/* update buffer extent descriptor of extended page */
 	xlen = lengthPXD(pxd);
 	xsize = xlen << JFS_SBI(sb)->l2bsize;
-#ifdef _STILL_TO_PORT
-	bmSetXD(smp, xaddr, xsize);
-#endif				/*  _STILL_TO_PORT */
 
 	/*
 	 * copy old stbl to new stbl at start of extended area
@@ -1836,7 +1833,7 @@ static int dtExtendPage(tid_t tid,
 	}
 
 	/*
-	 *      update parent entry on the parent/root page
+	 *	update parent entry on the parent/root page
 	 */
 	/*
 	 * acquire a transaction lock on the parent/root page
@@ -1904,7 +1901,7 @@ static int dtSplitRoot(tid_t tid,
 	sp = &JFS_IP(ip)->i_dtroot;
 
 	/*
-	 *      allocate/initialize a single (right) child page
+	 *	allocate/initialize a single (right) child page
 	 *
 	 * N.B. at first split, a one (or two) block to fit new entry
 	 * is allocated; at subsequent split, a full page is allocated;
@@ -1943,7 +1940,7 @@ static int dtSplitRoot(tid_t tid,
 	rp->header.prev = 0;
 
 	/*
-	 *      move in-line root page into new right page extent
+	 *	move in-line root page into new right page extent
 	 */
 	/* linelock header + copied entries + new stbl (1st slot) in new page */
 	ASSERT(dtlck->index == 0);
@@ -2016,7 +2013,7 @@ static int dtSplitRoot(tid_t tid,
 	dtInsertEntry(rp, split->index, split->key, split->data, &dtlck);
 
 	/*
-	 *      reset parent/root page
+	 *	reset parent/root page
 	 *
 	 * set the 1st entry offset to 0, which force the left-most key
 	 * at any level of the tree to be less than any search key.
@@ -2102,7 +2099,7 @@ int dtDelete(tid_t tid,
 	dtpage_t *np;
 
 	/*
-	 *      search for the entry to delete:
+	 *	search for the entry to delete:
 	 *
 	 * dtSearch() returns (leaf page pinned, index at which to delete).
 	 */
@@ -2253,7 +2250,7 @@ static int dtDeleteUp(tid_t tid, struct inode *ip,
 	int i;
 
 	/*
-	 *      keep the root leaf page which has become empty
+	 *	keep the root leaf page which has become empty
 	 */
 	if (BT_IS_ROOT(fmp)) {
 		/*
@@ -2269,7 +2266,7 @@ static int dtDeleteUp(tid_t tid, struct inode *ip,
 	}
 
 	/*
-	 *      free the non-root leaf page
+	 *	free the non-root leaf page
 	 */
 	/*
 	 * acquire a transaction lock on the page
@@ -2299,7 +2296,7 @@ static int dtDeleteUp(tid_t tid, struct inode *ip,
 	discard_metapage(fmp);
 
 	/*
-	 *      propagate page deletion up the directory tree
+	 *	propagate page deletion up the directory tree
 	 *
 	 * If the delete from the parent page makes it empty,
 	 * continue all the way up the tree.
@@ -2440,10 +2437,10 @@ static int dtDeleteUp(tid_t tid, struct inode *ip,
 
 #ifdef _NOTYET
 /*
- * NAME:        dtRelocate()
+ * NAME:	dtRelocate()
  *
- * FUNCTION:    relocate dtpage (internal or leaf) of directory;
- *              This function is mainly used by defragfs utility.
+ * FUNCTION:	relocate dtpage (internal or leaf) of directory;
+ *		This function is mainly used by defragfs utility.
  */
 int dtRelocate(tid_t tid, struct inode *ip, s64 lmxaddr, pxd_t * opxd,
 	       s64 nxaddr)
@@ -2471,8 +2468,8 @@ int dtRelocate(tid_t tid, struct inode *ip, s64 lmxaddr, pxd_t * opxd,
 		   xlen);
 
 	/*
-	 *      1. get the internal parent dtpage covering
-	 *      router entry for the tartget page to be relocated;
+	 *	1. get the internal parent dtpage covering
+	 *	router entry for the tartget page to be relocated;
 	 */
 	rc = dtSearchNode(ip, lmxaddr, opxd, &btstack);
 	if (rc)
@@ -2483,7 +2480,7 @@ int dtRelocate(tid_t tid, struct inode *ip, s64 lmxaddr, pxd_t * opxd,
 	jfs_info("dtRelocate: parent router entry validated.");
 
 	/*
-	 *      2. relocate the target dtpage
+	 *	2. relocate the target dtpage
 	 */
 	/* read in the target page from src extent */
 	DT_GETPAGE(ip, oxaddr, mp, PSIZE, p, rc);
@@ -2581,9 +2578,7 @@ int dtRelocate(tid_t tid, struct inode *ip, s64 lmxaddr, pxd_t * opxd,
 
 	/* update the buffer extent descriptor of the dtpage */
 	xsize = xlen << JFS_SBI(ip->i_sb)->l2bsize;
-#ifdef _STILL_TO_PORT
-	bmSetXD(mp, nxaddr, xsize);
-#endif /* _STILL_TO_PORT */
+
 	/* unpin the relocated page */
 	DT_PUTPAGE(mp);
 	jfs_info("dtRelocate: target dtpage relocated.");
@@ -2594,7 +2589,7 @@ int dtRelocate(tid_t tid, struct inode *ip, s64 lmxaddr, pxd_t * opxd,
 	 */
 
 	/*
-	 *      3. acquire maplock for the source extent to be freed;
+	 *	3. acquire maplock for the source extent to be freed;
 	 */
 	/* for dtpage relocation, write a LOG_NOREDOPAGE record
 	 * for the source dtpage (logredo() will init NoRedoPage
@@ -2609,7 +2604,7 @@ int dtRelocate(tid_t tid, struct inode *ip, s64 lmxaddr, pxd_t * opxd,
 	pxdlock->index = 1;
 
 	/*
-	 *      4. update the parent router entry for relocation;
+	 *	4. update the parent router entry for relocation;
 	 *
 	 * acquire tlck for the parent entry covering the target dtpage;
 	 * write LOG_REDOPAGE to apply after image only;
@@ -2637,7 +2632,7 @@ int dtRelocate(tid_t tid, struct inode *ip, s64 lmxaddr, pxd_t * opxd,
  * NAME:	dtSearchNode()
  *
  * FUNCTION:	Search for an dtpage containing a specified address
- *              This function is mainly used by defragfs utility.
+ *		This function is mainly used by defragfs utility.
  *
  * NOTE:	Search result on stack, the found page is pinned at exit.
  *		The result page must be an internal dtpage.
@@ -2660,7 +2655,7 @@ static int dtSearchNode(struct inode *ip, s64 lmxaddr, pxd_t * kpxd,
 	BT_CLR(btstack);	/* reset stack */
 
 	/*
-	 *      descend tree to the level with specified leftmost page
+	 *	descend tree to the level with specified leftmost page
 	 *
 	 *  by convention, root bn = 0.
 	 */
@@ -2699,7 +2694,7 @@ static int dtSearchNode(struct inode *ip, s64 lmxaddr, pxd_t * kpxd,
 	}
 
 	/*
-	 *      search each page at the current levevl
+	 *	search each page at the current levevl
 	 */
       loop:
 	stbl = DT_GETSTBL(p);
@@ -3044,9 +3039,9 @@ int jfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
 	if (DO_INDEX(ip)) {
 		/*
 		 * persistent index is stored in directory entries.
-		 * Special cases:        0 = .
-		 *                       1 = ..
-		 *                      -1 = End of directory
+		 * Special cases:	 0 = .
+		 *			 1 = ..
+		 *			-1 = End of directory
 		 */
 		do_index = 1;
 
@@ -3128,10 +3123,10 @@ int jfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
 		/*
 		 * Legacy filesystem - OS/2 & Linux JFS < 0.3.6
 		 *
-		 * pn = index = 0:      First entry "."
-		 * pn = 0; index = 1:   Second entry ".."
-		 * pn > 0:              Real entries, pn=1 -> leftmost page
-		 * pn = index = -1:     No more entries
+		 * pn = index = 0:	First entry "."
+		 * pn = 0; index = 1:	Second entry ".."
+		 * pn > 0:		Real entries, pn=1 -> leftmost page
+		 * pn = index = -1:	No more entries
 		 */
 		dtpos = filp->f_pos;
 		if (dtpos == 0) {
@@ -3351,7 +3346,7 @@ static int dtReadFirst(struct inode *ip, struct btstack * btstack)
 	BT_CLR(btstack);	/* reset stack */
 
 	/*
-	 *      descend leftmost path of the tree
+	 *	descend leftmost path of the tree
 	 *
 	 * by convention, root bn = 0.
 	 */
@@ -4531,7 +4526,7 @@ int dtModify(tid_t tid, struct inode *ip,
 	struct ldtentry *entry;
 
 	/*
-	 *      search for the entry to modify:
+	 *	search for the entry to modify:
 	 *
 	 * dtSearch() returns (leaf page pinned, index at which to modify).
 	 */
diff --git a/fs/jfs/jfs_dtree.h b/fs/jfs/jfs_dtree.h
index af8513f..8561c6e 100644
--- a/fs/jfs/jfs_dtree.h
+++ b/fs/jfs/jfs_dtree.h
@@ -35,7 +35,7 @@ typedef union {
 
 
 /*
- *      entry segment/slot
+ *	entry segment/slot
  *
  * an entry consists of type dependent head/only segment/slot and
  * additional segments/slots linked vi next field;
diff --git a/fs/jfs/jfs_extent.c b/fs/jfs/jfs_extent.c
index a35bdca..7ae1e32 100644
--- a/fs/jfs/jfs_extent.c
+++ b/fs/jfs/jfs_extent.c
@@ -34,8 +34,8 @@ static int extBrealloc(struct inode *, s64, s64, s64 *, s64 *);
 #endif
 static s64 extRoundDown(s64 nb);
 
-#define DPD(a)          (printk("(a): %d\n",(a)))
-#define DPC(a)          (printk("(a): %c\n",(a)))
+#define DPD(a)		(printk("(a): %d\n",(a)))
+#define DPC(a)		(printk("(a): %c\n",(a)))
 #define DPL1(a)					\
 {						\
 	if ((a) >> 32)				\
@@ -51,19 +51,19 @@ static s64 extRoundDown(s64 nb);
 		printk("(a): %x\n",(a) << 32);	\
 }
 
-#define DPD1(a)         (printk("(a): %d  ",(a)))
-#define DPX(a)          (printk("(a): %08x\n",(a)))
-#define DPX1(a)         (printk("(a): %08x  ",(a)))
-#define DPS(a)          (printk("%s\n",(a)))
-#define DPE(a)          (printk("\nENTERING: %s\n",(a)))
-#define DPE1(a)          (printk("\nENTERING: %s",(a)))
-#define DPS1(a)         (printk("  %s  ",(a)))
+#define DPD1(a)		(printk("(a): %d  ",(a)))
+#define DPX(a)		(printk("(a): %08x\n",(a)))
+#define DPX1(a)		(printk("(a): %08x  ",(a)))
+#define DPS(a)		(printk("%s\n",(a)))
+#define DPE(a)		(printk("\nENTERING: %s\n",(a)))
+#define DPE1(a)		(printk("\nENTERING: %s",(a)))
+#define DPS1(a)		(printk("  %s  ",(a)))
 
 
 /*
  * NAME:	extAlloc()
  *
- * FUNCTION:    allocate an extent for a specified page range within a
+ * FUNCTION:	allocate an extent for a specified page range within a
  *		file.
  *
  * PARAMETERS:
@@ -78,9 +78,9 @@ static s64 extRoundDown(s64 nb);
  *		  should be marked as allocated but not recorded.
  *
  * RETURN VALUES:
- *      0       - success
- *      -EIO	- i/o error.
- *      -ENOSPC	- insufficient disk resources.
+ *	0	- success
+ *	-EIO	- i/o error.
+ *	-ENOSPC	- insufficient disk resources.
  */
 int
 extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, bool abnr)
@@ -192,9 +192,9 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, bool abnr)
 
 #ifdef _NOTYET
 /*
- * NAME:        extRealloc()
+ * NAME:	extRealloc()
  *
- * FUNCTION:    extend the allocation of a file extent containing a
+ * FUNCTION:	extend the allocation of a file extent containing a
  *		partial back last page.
  *
  * PARAMETERS:
@@ -207,9 +207,9 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, bool abnr)
  *		  should be marked as allocated but not recorded.
  *
  * RETURN VALUES:
- *      0       - success
- *      -EIO	- i/o error.
- *      -ENOSPC	- insufficient disk resources.
+ *	0	- success
+ *	-EIO	- i/o error.
+ *	-ENOSPC	- insufficient disk resources.
  */
 int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, bool abnr)
 {
@@ -345,9 +345,9 @@ exit:
 
 
 /*
- * NAME:        extHint()
+ * NAME:	extHint()
  *
- * FUNCTION:    produce an extent allocation hint for a file offset.
+ * FUNCTION:	produce an extent allocation hint for a file offset.
  *
  * PARAMETERS:
  *	ip	- the inode of the file.
@@ -356,8 +356,8 @@ exit:
  *		  the hint.
  *
  * RETURN VALUES:
- *      0       - success
- *      -EIO	- i/o error.
+ *	0	- success
+ *	-EIO	- i/o error.
  */
 int extHint(struct inode *ip, s64 offset, xad_t * xp)
 {
@@ -387,7 +387,7 @@ int extHint(struct inode *ip, s64 offset, xad_t * xp)
 	lxdl.nlxd = 1;
 	lxdl.lxd = &lxd;
 	LXDoffset(&lxd, prev)
-	    LXDlength(&lxd, nbperpage);
+	LXDlength(&lxd, nbperpage);
 
 	xadl.maxnxad = 1;
 	xadl.nxad = 0;
@@ -397,11 +397,11 @@ int extHint(struct inode *ip, s64 offset, xad_t * xp)
 	if ((rc = xtLookupList(ip, &lxdl, &xadl, 0)))
 		return (rc);
 
-	/* check if not extent exists for the previous page.
+	/* check if no extent exists for the previous page.
 	 * this is possible for sparse files.
 	 */
 	if (xadl.nxad == 0) {
-//              assert(ISSPARSE(ip));
+//		assert(ISSPARSE(ip));
 		return (0);
 	}
 
@@ -410,28 +410,28 @@ int extHint(struct inode *ip, s64 offset, xad_t * xp)
 	 */
 	xp->flag &= XAD_NOTRECORDED;
 
-        if(xadl.nxad != 1 || lengthXAD(xp) != nbperpage) {
+	if(xadl.nxad != 1 || lengthXAD(xp) != nbperpage) {
 		jfs_error(ip->i_sb, "extHint: corrupt xtree");
 		return -EIO;
-        }
+	}
 
 	return (0);
 }
 
 
 /*
- * NAME:        extRecord()
+ * NAME:	extRecord()
  *
- * FUNCTION:    change a page with a file from not recorded to recorded.
+ * FUNCTION:	change a page with a file from not recorded to recorded.
  *
  * PARAMETERS:
  *	ip	- inode of the file.
  *	cp	- cbuf of the file page.
  *
  * RETURN VALUES:
- *      0       - success
- *      -EIO	- i/o error.
- *      -ENOSPC	- insufficient disk resources.
+ *	0	- success
+ *	-EIO	- i/o error.
+ *	-ENOSPC	- insufficient disk resources.
  */
 int extRecord(struct inode *ip, xad_t * xp)
 {
@@ -451,9 +451,9 @@ int extRecord(struct inode *ip, xad_t * xp)
 
 #ifdef _NOTYET
 /*
- * NAME:        extFill()
+ * NAME:	extFill()
  *
- * FUNCTION:    allocate disk space for a file page that represents
+ * FUNCTION:	allocate disk space for a file page that represents
  *		a file hole.
  *
  * PARAMETERS:
@@ -461,16 +461,16 @@ int extRecord(struct inode *ip, xad_t * xp)
  *	cp	- cbuf of the file page represent the hole.
  *
  * RETURN VALUES:
- *      0       - success
- *      -EIO	- i/o error.
- *      -ENOSPC	- insufficient disk resources.
+ *	0	- success
+ *	-EIO	- i/o error.
+ *	-ENOSPC	- insufficient disk resources.
  */
 int extFill(struct inode *ip, xad_t * xp)
 {
 	int rc, nbperpage = JFS_SBI(ip->i_sb)->nbperpage;
 	s64 blkno = offsetXAD(xp) >> ip->i_blkbits;
 
-//      assert(ISSPARSE(ip));
+//	assert(ISSPARSE(ip));
 
 	/* initialize the extent allocation hint */
 	XADaddress(xp, 0);
@@ -489,7 +489,7 @@ int extFill(struct inode *ip, xad_t * xp)
 /*
  * NAME:	extBalloc()
  *
- * FUNCTION:    allocate disk blocks to form an extent.
+ * FUNCTION:	allocate disk blocks to form an extent.
  *
  *		initially, we will try to allocate disk blocks for the
  *		requested size (nblocks).  if this fails (nblocks
@@ -513,9 +513,9 @@ int extFill(struct inode *ip, xad_t * xp)
  *		   allocated block range.
  *
  * RETURN VALUES:
- *      0       - success
- *      -EIO	- i/o error.
- *      -ENOSPC	- insufficient disk resources.
+ *	0	- success
+ *	-EIO	- i/o error.
+ *	-ENOSPC	- insufficient disk resources.
  */
 static int
 extBalloc(struct inode *ip, s64 hint, s64 * nblocks, s64 * blkno)
@@ -580,7 +580,7 @@ extBalloc(struct inode *ip, s64 hint, s64 * nblocks, s64 * blkno)
 /*
  * NAME:	extBrealloc()
  *
- * FUNCTION:    attempt to extend an extent's allocation.
+ * FUNCTION:	attempt to extend an extent's allocation.
  *
  *		Initially, we will try to extend the extent's allocation
  *		in place.  If this fails, we'll try to move the extent
@@ -597,8 +597,8 @@ extBalloc(struct inode *ip, s64 hint, s64 * nblocks, s64 * blkno)
  *
  * PARAMETERS:
  *	ip	 - the inode of the file.
- *	blkno    - starting block number of the extents current allocation.
- *	nblks    - number of blocks within the extents current allocation.
+ *	blkno	 - starting block number of the extents current allocation.
+ *	nblks	 - number of blocks within the extents current allocation.
  *	newnblks - pointer to a s64 value.  on entry, this value is the
  *		   the new desired extent size (number of blocks).  on
  *		   successful exit, this value is set to the extent's actual
@@ -606,9 +606,9 @@ extBalloc(struct inode *ip, s64 hint, s64 * nblocks, s64 * blkno)
  *	newblkno - the starting block number of the extents new allocation.
  *
  * RETURN VALUES:
- *      0       - success
- *      -EIO	- i/o error.
- *      -ENOSPC	- insufficient disk resources.
+ *	0	- success
+ *	-EIO	- i/o error.
+ *	-ENOSPC	- insufficient disk resources.
  */
 static int
 extBrealloc(struct inode *ip,
@@ -634,16 +634,16 @@ extBrealloc(struct inode *ip,
 
 
 /*
- * NAME:        extRoundDown()
+ * NAME:	extRoundDown()
  *
- * FUNCTION:    round down a specified number of blocks to the next
+ * FUNCTION:	round down a specified number of blocks to the next
  *		smallest power of 2 number.
  *
  * PARAMETERS:
  *	nb	- the inode of the file.
  *
  * RETURN VALUES:
- *      next smallest power of 2 number.
+ *	next smallest power of 2 number.
  */
 static s64 extRoundDown(s64 nb)
 {
diff --git a/fs/jfs/jfs_filsys.h b/fs/jfs/jfs_filsys.h
index 38f70ac..b3f5463 100644
--- a/fs/jfs/jfs_filsys.h
+++ b/fs/jfs/jfs_filsys.h
@@ -34,9 +34,9 @@
 #define JFS_UNICODE	0x00000001	/* unicode name */
 
 /* mount time flags for error handling */
-#define JFS_ERR_REMOUNT_RO 0x00000002   /* remount read-only */
-#define JFS_ERR_CONTINUE   0x00000004   /* continue */
-#define JFS_ERR_PANIC      0x00000008   /* panic */
+#define JFS_ERR_REMOUNT_RO 0x00000002	/* remount read-only */
+#define JFS_ERR_CONTINUE   0x00000004	/* continue */
+#define JFS_ERR_PANIC      0x00000008	/* panic */
 
 /* Quota support */
 #define	JFS_USRQUOTA	0x00000010
@@ -83,7 +83,6 @@
 /*	case-insensitive name/directory support */
 
 #define JFS_AIX		0x80000000	/* AIX support */
-/*	POSIX name/directory  support - Never implemented*/
 
 /*
  *	buffer cache configuration
@@ -113,10 +112,10 @@
 #define IDATASIZE	256	/* inode inline data size */
 #define	IXATTRSIZE	128	/* inode inline extended attribute size */
 
-#define XTPAGE_SIZE     4096
-#define log2_PAGESIZE     12
+#define XTPAGE_SIZE	4096
+#define log2_PAGESIZE	12
 
-#define IAG_SIZE        4096
+#define IAG_SIZE	4096
 #define IAG_EXTENT_SIZE 4096
 #define	INOSPERIAG	4096	/* number of disk inodes per iag */
 #define	L2INOSPERIAG	12	/* l2 number of disk inodes per iag */
diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c
index c653022..3870ba8 100644
--- a/fs/jfs/jfs_imap.c
+++ b/fs/jfs/jfs_imap.c
@@ -93,21 +93,21 @@ static int copy_from_dinode(struct dinode *, struct inode *);
 static void copy_to_dinode(struct dinode *, struct inode *);
 
 /*
- * NAME:        diMount()
+ * NAME:	diMount()
  *
- * FUNCTION:    initialize the incore inode map control structures for
+ * FUNCTION:	initialize the incore inode map control structures for
  *		a fileset or aggregate init time.
  *
- *              the inode map's control structure (dinomap) is
- *              brought in from disk and placed in virtual memory.
+ *		the inode map's control structure (dinomap) is
+ *		brought in from disk and placed in virtual memory.
  *
  * PARAMETERS:
- *      ipimap  - pointer to inode map inode for the aggregate or fileset.
+ *	ipimap	- pointer to inode map inode for the aggregate or fileset.
  *
  * RETURN VALUES:
- *      0       - success
- *      -ENOMEM  - insufficient free virtual memory.
- *      -EIO	- i/o error.
+ *	0	- success
+ *	-ENOMEM	- insufficient free virtual memory.
+ *	-EIO	- i/o error.
  */
 int diMount(struct inode *ipimap)
 {
@@ -180,18 +180,18 @@ int diMount(struct inode *ipimap)
 
 
 /*
- * NAME:        diUnmount()
+ * NAME:	diUnmount()
  *
- * FUNCTION:    write to disk the incore inode map control structures for
+ * FUNCTION:	write to disk the incore inode map control structures for
  *		a fileset or aggregate at unmount time.
  *
  * PARAMETERS:
- *      ipimap  - pointer to inode map inode for the aggregate or fileset.
+ *	ipimap	- pointer to inode map inode for the aggregate or fileset.
  *
  * RETURN VALUES:
- *      0       - success
- *      -ENOMEM  - insufficient free virtual memory.
- *      -EIO	- i/o error.
+ *	0	- success
+ *	-ENOMEM	- insufficient free virtual memory.
+ *	-EIO	- i/o error.
  */
 int diUnmount(struct inode *ipimap, int mounterror)
 {
@@ -274,9 +274,9 @@ int diSync(struct inode *ipimap)
 
 
 /*
- * NAME:        diRead()
+ * NAME:	diRead()
  *
- * FUNCTION:    initialize an incore inode from disk.
+ * FUNCTION:	initialize an incore inode from disk.
  *
  *		on entry, the specifed incore inode should itself
  *		specify the disk inode number corresponding to the
@@ -285,7 +285,7 @@ int diSync(struct inode *ipimap)
  *		this routine handles incore inode initialization for
  *		both "special" and "regular" inodes.  special inodes
  *		are those required early in the mount process and
- *	        require special handling since much of the file system
+ *		require special handling since much of the file system
  *		is not yet initialized.  these "special" inodes are
  *		identified by a NULL inode map inode pointer and are
  *		actually initialized by a call to diReadSpecial().
@@ -298,12 +298,12 @@ int diSync(struct inode *ipimap)
  *		incore inode.
  *
  * PARAMETERS:
- *      ip  -  pointer to incore inode to be initialized from disk.
+ *	ip	-  pointer to incore inode to be initialized from disk.
  *
  * RETURN VALUES:
- *      0       - success
- *      -EIO	- i/o error.
- *      -ENOMEM	- insufficient memory
+ *	0	- success
+ *	-EIO	- i/o error.
+ *	-ENOMEM	- insufficient memory
  *
  */
 int diRead(struct inode *ip)
@@ -410,26 +410,26 @@ int diRead(struct inode *ip)
 
 
 /*
- * NAME:        diReadSpecial()
+ * NAME:	diReadSpecial()
  *
- * FUNCTION:    initialize a 'special' inode from disk.
+ * FUNCTION:	initialize a 'special' inode from disk.
  *
  *		this routines handles aggregate level inodes.  The
  *		inode cache cannot differentiate between the
  *		aggregate inodes and the filesystem inodes, so we
  *		handle these here.  We don't actually use the aggregate
- *	        inode map, since these inodes are at a fixed location
+ *		inode map, since these inodes are at a fixed location
  *		and in some cases the aggregate inode map isn't initialized
  *		yet.
  *
  * PARAMETERS:
- *      sb - filesystem superblock
+ *	sb - filesystem superblock
  *	inum - aggregate inode number
  *	secondary - 1 if secondary aggregate inode table
  *
  * RETURN VALUES:
- *      new inode	- success
- *      NULL		- i/o error.
+ *	new inode	- success
+ *	NULL		- i/o error.
  */
 struct inode *diReadSpecial(struct super_block *sb, ino_t inum, int secondary)
 {
@@ -502,12 +502,12 @@ struct inode *diReadSpecial(struct super_block *sb, ino_t inum, int secondary)
 }
 
 /*
- * NAME:        diWriteSpecial()
+ * NAME:	diWriteSpecial()
  *
- * FUNCTION:    Write the special inode to disk
+ * FUNCTION:	Write the special inode to disk
  *
  * PARAMETERS:
- *      ip - special inode
+ *	ip - special inode
  *	secondary - 1 if secondary aggregate inode table
  *
  * RETURN VALUES: none
@@ -554,9 +554,9 @@ void diWriteSpecial(struct inode *ip, int secondary)
 }
 
 /*
- * NAME:        diFreeSpecial()
+ * NAME:	diFreeSpecial()
  *
- * FUNCTION:    Free allocated space for special inode
+ * FUNCTION:	Free allocated space for special inode
  */
 void diFreeSpecial(struct inode *ip)
 {
@@ -572,9 +572,9 @@ void diFreeSpecial(struct inode *ip)
 
 
 /*
- * NAME:        diWrite()
+ * NAME:	diWrite()
  *
- * FUNCTION:    write the on-disk inode portion of the in-memory inode
+ * FUNCTION:	write the on-disk inode portion of the in-memory inode
  *		to its corresponding on-disk inode.
  *
  *		on entry, the specifed incore inode should itself
@@ -589,11 +589,11 @@ void diFreeSpecial(struct inode *ip)
  *
  * PARAMETERS:
  *	tid -  transacation id
- *      ip  -  pointer to incore inode to be written to the inode extent.
+ *	ip  -  pointer to incore inode to be written to the inode extent.
  *
  * RETURN VALUES:
- *      0       - success
- *      -EIO	- i/o error.
+ *	0	- success
+ *	-EIO	- i/o error.
  */
 int diWrite(tid_t tid, struct inode *ip)
 {
@@ -730,7 +730,7 @@ int diWrite(tid_t tid, struct inode *ip)
 	ilinelock = (struct linelock *) & tlck->lock;
 
 	/*
-	 *      regular file: 16 byte (XAD slot) granularity
+	 *	regular file: 16 byte (XAD slot) granularity
 	 */
 	if (type & tlckXTREE) {
 		xtpage_t *p, *xp;
@@ -755,7 +755,7 @@ int diWrite(tid_t tid, struct inode *ip)
 				xad->flag &= ~(XAD_NEW | XAD_EXTENDED);
 	}
 	/*
-	 *      directory: 32 byte (directory entry slot) granularity
+	 *	directory: 32 byte (directory entry slot) granularity
 	 */
 	else if (type & tlckDTREE) {
 		dtpage_t *p, *xp;
@@ -800,9 +800,8 @@ int diWrite(tid_t tid, struct inode *ip)
 	}
 
 	/*
-	 *      lock/copy inode base: 128 byte slot granularity
+	 *	lock/copy inode base: 128 byte slot granularity
 	 */
-// baseDinode:
 	lv = & dilinelock->lv[dilinelock->index];
 	lv->offset = dioffset >> L2INODESLOTSIZE;
 	copy_to_dinode(dp, ip);
@@ -813,17 +812,6 @@ int diWrite(tid_t tid, struct inode *ip)
 		lv->length = 1;
 	dilinelock->index++;
 
-#ifdef _JFS_FASTDASD
-	/*
-	 * We aren't logging changes to the DASD used in directory inodes,
-	 * but we need to write them to disk.  If we don't unmount cleanly,
-	 * mount will recalculate the DASD used.
-	 */
-	if (S_ISDIR(ip->i_mode)
-	    && (ip->i_ipmnt->i_mntflag & JFS_DASD_ENABLED))
-		memcpy(&dp->di_DASD, &ip->i_DASD, sizeof(struct dasd));
-#endif				/*  _JFS_FASTDASD */
-
 	/* release the buffer holding the updated on-disk inode.
 	 * the buffer will be later written by commit processing.
 	 */
@@ -834,9 +822,9 @@ int diWrite(tid_t tid, struct inode *ip)
 
 
 /*
- * NAME:        diFree(ip)
+ * NAME:	diFree(ip)
  *
- * FUNCTION:    free a specified inode from the inode working map
+ * FUNCTION:	free a specified inode from the inode working map
  *		for a fileset or aggregate.
  *
  *		if the inode to be freed represents the first (only)
@@ -865,11 +853,11 @@ int diWrite(tid_t tid, struct inode *ip)
  *		any updates and are held until all updates are complete.
  *
  * PARAMETERS:
- *      ip	- inode to be freed.
+ *	ip	- inode to be freed.
  *
  * RETURN VALUES:
- *      0       - success
- *      -EIO	- i/o error.
+ *	0	- success
+ *	-EIO	- i/o error.
  */
 int diFree(struct inode *ip)
 {
@@ -902,7 +890,8 @@ int diFree(struct inode *ip)
 	 * the map.
 	 */
 	if (iagno >= imap->im_nextiag) {
-		dump_mem("imap", imap, 32);
+		print_hex_dump(KERN_ERR, "imap: ", DUMP_PREFIX_ADDRESS, 16, 4,
+			       imap, 32, 0);
 		jfs_error(ip->i_sb,
 			  "diFree: inum = %d, iagno = %d, nextiag = %d",
 			  (uint) inum, iagno, imap->im_nextiag);
@@ -964,8 +953,8 @@ int diFree(struct inode *ip)
 		return -EIO;
 	}
 	/*
-	 *      inode extent still has some inodes or below low water mark:
-	 *      keep the inode extent;
+	 *	inode extent still has some inodes or below low water mark:
+	 *	keep the inode extent;
 	 */
 	if (bitmap ||
 	    imap->im_agctl[agno].numfree < 96 ||
@@ -1047,12 +1036,12 @@ int diFree(struct inode *ip)
 
 
 	/*
-	 *      inode extent has become free and above low water mark:
-	 *      free the inode extent;
+	 *	inode extent has become free and above low water mark:
+	 *	free the inode extent;
 	 */
 
 	/*
-	 *      prepare to update iag list(s) (careful update step 1)
+	 *	prepare to update iag list(s) (careful update step 1)
 	 */
 	amp = bmp = cmp = dmp = NULL;
 	fwd = back = -1;
@@ -1152,7 +1141,7 @@ int diFree(struct inode *ip)
 	invalidate_pxd_metapages(ip, freepxd);
 
 	/*
-	 *      update iag list(s) (careful update step 2)
+	 *	update iag list(s) (careful update step 2)
 	 */
 	/* add the iag to the ag extent free list if this is the
 	 * first free extent for the iag.
@@ -1338,20 +1327,20 @@ diInitInode(struct inode *ip, int iagno, int ino, int extno, struct iag * iagp)
 
 
 /*
- * NAME:        diAlloc(pip,dir,ip)
+ * NAME:	diAlloc(pip,dir,ip)
  *
- * FUNCTION:    allocate a disk inode from the inode working map
+ * FUNCTION:	allocate a disk inode from the inode working map
  *		for a fileset or aggregate.
  *
  * PARAMETERS:
- *      pip	- pointer to incore inode for the parent inode.
- *      dir	- 'true' if the new disk inode is for a directory.
- *      ip	- pointer to a new inode
+ *	pip	- pointer to incore inode for the parent inode.
+ *	dir	- 'true' if the new disk inode is for a directory.
+ *	ip	- pointer to a new inode
  *
  * RETURN VALUES:
- *      0       - success.
- *      -ENOSPC	- insufficient disk resources.
- *      -EIO	- i/o error.
+ *	0	- success.
+ *	-ENOSPC	- insufficient disk resources.
+ *	-EIO	- i/o error.
  */
 int diAlloc(struct inode *pip, bool dir, struct inode *ip)
 {
@@ -1433,7 +1422,7 @@ int diAlloc(struct inode *pip, bool dir, struct inode *ip)
 	addext = (imap->im_agctl[agno].numfree < 32 && iagp->nfreeexts);
 
 	/*
-	 *      try to allocate from the IAG
+	 *	try to allocate from the IAG
 	 */
 	/* check if the inode may be allocated from the iag
 	 * (i.e. the inode has free inodes or new extent can be added).
@@ -1633,9 +1622,9 @@ int diAlloc(struct inode *pip, bool dir, struct inode *ip)
 
 
 /*
- * NAME:        diAllocAG(imap,agno,dir,ip)
+ * NAME:	diAllocAG(imap,agno,dir,ip)
  *
- * FUNCTION:    allocate a disk inode from the allocation group.
+ * FUNCTION:	allocate a disk inode from the allocation group.
  *
  *		this routine first determines if a new extent of free
  *		inodes should be added for the allocation group, with
@@ -1649,17 +1638,17 @@ int diAlloc(struct inode *pip, bool dir, struct inode *ip)
  * PRE CONDITION: Already have the AG lock for this AG.
  *
  * PARAMETERS:
- *      imap	- pointer to inode map control structure.
- *      agno	- allocation group to allocate from.
- *      dir	- 'true' if the new disk inode is for a directory.
- *      ip	- pointer to the new inode to be filled in on successful return
+ *	imap	- pointer to inode map control structure.
+ *	agno	- allocation group to allocate from.
+ *	dir	- 'true' if the new disk inode is for a directory.
+ *	ip	- pointer to the new inode to be filled in on successful return
  *		  with the disk inode number allocated, its extent address
  *		  and the start of the ag.
  *
  * RETURN VALUES:
- *      0       - success.
- *      -ENOSPC	- insufficient disk resources.
- *      -EIO	- i/o error.
+ *	0	- success.
+ *	-ENOSPC	- insufficient disk resources.
+ *	-EIO	- i/o error.
  */
 static int
 diAllocAG(struct inomap * imap, int agno, bool dir, struct inode *ip)
@@ -1709,9 +1698,9 @@ diAllocAG(struct inomap * imap, int agno, bool dir, struct inode *ip)
 
 
 /*
- * NAME:        diAllocAny(imap,agno,dir,iap)
+ * NAME:	diAllocAny(imap,agno,dir,iap)
  *
- * FUNCTION:    allocate a disk inode from any other allocation group.
+ * FUNCTION:	allocate a disk inode from any other allocation group.
  *
  *		this routine is called when an allocation attempt within
  *		the primary allocation group has failed. if attempts to
@@ -1719,17 +1708,17 @@ diAllocAG(struct inomap * imap, int agno, bool dir, struct inode *ip)
  *		specified primary group.
  *
  * PARAMETERS:
- *      imap	- pointer to inode map control structure.
- *      agno	- primary allocation group (to avoid).
- *      dir	- 'true' if the new disk inode is for a directory.
- *      ip	- pointer to a new inode to be filled in on successful return
+ *	imap	- pointer to inode map control structure.
+ *	agno	- primary allocation group (to avoid).
+ *	dir	- 'true' if the new disk inode is for a directory.
+ *	ip	- pointer to a new inode to be filled in on successful return
  *		  with the disk inode number allocated, its extent address
  *		  and the start of the ag.
  *
  * RETURN VALUES:
- *      0       - success.
- *      -ENOSPC	- insufficient disk resources.
- *      -EIO	- i/o error.
+ *	0	- success.
+ *	-ENOSPC	- insufficient disk resources.
+ *	-EIO	- i/o error.
  */
 static int
 diAllocAny(struct inomap * imap, int agno, bool dir, struct inode *ip)
@@ -1772,9 +1761,9 @@ diAllocAny(struct inomap * imap, int agno, bool dir, struct inode *ip)
 
 
 /*
- * NAME:        diAllocIno(imap,agno,ip)
+ * NAME:	diAllocIno(imap,agno,ip)
  *
- * FUNCTION:    allocate a disk inode from the allocation group's free
+ * FUNCTION:	allocate a disk inode from the allocation group's free
  *		inode list, returning an error if this free list is
  *		empty (i.e. no iags on the list).
  *
@@ -1785,16 +1774,16 @@ diAllocAny(struct inomap * imap, int agno, bool dir, struct inode *ip)
  * PRE CONDITION: Already have AG lock for this AG.
  *
  * PARAMETERS:
- *      imap	- pointer to inode map control structure.
- *      agno	- allocation group.
- *      ip	- pointer to new inode to be filled in on successful return
+ *	imap	- pointer to inode map control structure.
+ *	agno	- allocation group.
+ *	ip	- pointer to new inode to be filled in on successful return
  *		  with the disk inode number allocated, its extent address
  *		  and the start of the ag.
  *
  * RETURN VALUES:
- *      0       - success.
- *      -ENOSPC	- insufficient disk resources.
- *      -EIO	- i/o error.
+ *	0	- success.
+ *	-ENOSPC	- insufficient disk resources.
+ *	-EIO	- i/o error.
  */
 static int diAllocIno(struct inomap * imap, int agno, struct inode *ip)
 {
@@ -1890,7 +1879,7 @@ static int diAllocIno(struct inomap * imap, int agno, struct inode *ip)
 
 
 /*
- * NAME:        diAllocExt(imap,agno,ip)
+ * NAME:	diAllocExt(imap,agno,ip)
  *
  * FUNCTION:	add a new extent of free inodes to an iag, allocating
  *		an inode from this extent to satisfy the current allocation
@@ -1910,16 +1899,16 @@ static int diAllocIno(struct inomap * imap, int agno, struct inode *ip)
  *		for the purpose of satisfying this request.
  *
  * PARAMETERS:
- *      imap	- pointer to inode map control structure.
- *      agno	- allocation group number.
- *      ip	- pointer to new inode to be filled in on successful return
+ *	imap	- pointer to inode map control structure.
+ *	agno	- allocation group number.
+ *	ip	- pointer to new inode to be filled in on successful return
  *		  with the disk inode number allocated, its extent address
  *		  and the start of the ag.
  *
  * RETURN VALUES:
- *      0       - success.
- *      -ENOSPC	- insufficient disk resources.
- *      -EIO	- i/o error.
+ *	0	- success.
+ *	-ENOSPC	- insufficient disk resources.
+ *	-EIO	- i/o error.
  */
 static int diAllocExt(struct inomap * imap, int agno, struct inode *ip)
 {
@@ -2010,7 +1999,7 @@ static int diAllocExt(struct inomap * imap, int agno, struct inode *ip)
 
 
 /*
- * NAME:        diAllocBit(imap,iagp,ino)
+ * NAME:	diAllocBit(imap,iagp,ino)
  *
  * FUNCTION:	allocate a backed inode from an iag.
  *
@@ -2030,14 +2019,14 @@ static int diAllocExt(struct inomap * imap, int agno, struct inode *ip)
  *	this AG.  Must have read lock on imap inode.
  *
  * PARAMETERS:
- *      imap	- pointer to inode map control structure.
- *      iagp	- pointer to iag.
- *      ino	- inode number to be allocated within the iag.
+ *	imap	- pointer to inode map control structure.
+ *	iagp	- pointer to iag.
+ *	ino	- inode number to be allocated within the iag.
  *
  * RETURN VALUES:
- *      0       - success.
- *      -ENOSPC	- insufficient disk resources.
- *      -EIO	- i/o error.
+ *	0	- success.
+ *	-ENOSPC	- insufficient disk resources.
+ *	-EIO	- i/o error.
  */
 static int diAllocBit(struct inomap * imap, struct iag * iagp, int ino)
 {
@@ -2144,11 +2133,11 @@ static int diAllocBit(struct inomap * imap, struct iag * iagp, int ino)
 
 
 /*
- * NAME:        diNewExt(imap,iagp,extno)
+ * NAME:	diNewExt(imap,iagp,extno)
  *
- * FUNCTION:    initialize a new extent of inodes for an iag, allocating
- *	        the first inode of the extent for use for the current
- *	        allocation request.
+ * FUNCTION:	initialize a new extent of inodes for an iag, allocating
+ *		the first inode of the extent for use for the current
+ *		allocation request.
  *
  *		disk resources are allocated for the new extent of inodes
  *		and the inodes themselves are initialized to reflect their
@@ -2177,14 +2166,14 @@ static int diAllocBit(struct inomap * imap, struct iag * iagp, int ino)
  *	this AG.  Must have read lock on imap inode.
  *
  * PARAMETERS:
- *      imap	- pointer to inode map control structure.
- *      iagp	- pointer to iag.
- *      extno	- extent number.
+ *	imap	- pointer to inode map control structure.
+ *	iagp	- pointer to iag.
+ *	extno	- extent number.
  *
  * RETURN VALUES:
- *      0       - success.
- *      -ENOSPC	- insufficient disk resources.
- *      -EIO	- i/o error.
+ *	0	- success.
+ *	-ENOSPC	- insufficient disk resources.
+ *	-EIO	- i/o error.
  */
 static int diNewExt(struct inomap * imap, struct iag * iagp, int extno)
 {
@@ -2430,7 +2419,7 @@ static int diNewExt(struct inomap * imap, struct iag * iagp, int extno)
 
 
 /*
- * NAME:        diNewIAG(imap,iagnop,agno)
+ * NAME:	diNewIAG(imap,iagnop,agno)
  *
  * FUNCTION:	allocate a new iag for an allocation group.
  *
@@ -2443,16 +2432,16 @@ static int diNewExt(struct inomap * imap, struct iag * iagp, int extno)
  *		and returned to satisfy the request.
  *
  * PARAMETERS:
- *      imap	- pointer to inode map control structure.
- *      iagnop	- pointer to an iag number set with the number of the
+ *	imap	- pointer to inode map control structure.
+ *	iagnop	- pointer to an iag number set with the number of the
  *		  newly allocated iag upon successful return.
- *      agno	- allocation group number.
+ *	agno	- allocation group number.
  *	bpp	- Buffer pointer to be filled in with new IAG's buffer
  *
  * RETURN VALUES:
- *      0       - success.
- *      -ENOSPC	- insufficient disk resources.
- *      -EIO	- i/o error.
+ *	0	- success.
+ *	-ENOSPC	- insufficient disk resources.
+ *	-EIO	- i/o error.
  *
  * serialization:
  *	AG lock held on entry/exit;
@@ -2461,7 +2450,7 @@ static int diNewExt(struct inomap * imap, struct iag * iagp, int extno)
  *
  * note: new iag transaction:
  * . synchronously write iag;
- * . write log of xtree and inode  of imap;
+ * . write log of xtree and inode of imap;
  * . commit;
  * . synchronous write of xtree (right to left, bottom to top);
  * . at start of logredo(): init in-memory imap with one additional iag page;
@@ -2481,9 +2470,6 @@ diNewIAG(struct inomap * imap, int *iagnop, int agno, struct metapage ** mpp)
 	s64 xaddr = 0;
 	s64 blkno;
 	tid_t tid;
-#ifdef _STILL_TO_PORT
-	xad_t xad;
-#endif				/*  _STILL_TO_PORT */
 	struct inode *iplist[1];
 
 	/* pick up pointers to the inode map and mount inodes */
@@ -2674,15 +2660,15 @@ diNewIAG(struct inomap * imap, int *iagnop, int agno, struct metapage ** mpp)
 }
 
 /*
- * NAME:        diIAGRead()
+ * NAME:	diIAGRead()
  *
- * FUNCTION:    get the buffer for the specified iag within a fileset
+ * FUNCTION:	get the buffer for the specified iag within a fileset
  *		or aggregate inode map.
  *
  * PARAMETERS:
- *      imap	- pointer to inode map control structure.
- *      iagno	- iag number.
- *      bpp	- point to buffer pointer to be filled in on successful
+ *	imap	- pointer to inode map control structure.
+ *	iagno	- iag number.
+ *	bpp	- point to buffer pointer to be filled in on successful
  *		  exit.
  *
  * SERIALIZATION:
@@ -2691,8 +2677,8 @@ diNewIAG(struct inomap * imap, int *iagnop, int agno, struct metapage ** mpp)
  *	 the read lock is unnecessary.)
  *
  * RETURN VALUES:
- *      0       - success.
- *      -EIO	- i/o error.
+ *	0	- success.
+ *	-EIO	- i/o error.
  */
 static int diIAGRead(struct inomap * imap, int iagno, struct metapage ** mpp)
 {
@@ -2712,17 +2698,17 @@ static int diIAGRead(struct inomap * imap, int iagno, struct metapage ** mpp)
 }
 
 /*
- * NAME:        diFindFree()
+ * NAME:	diFindFree()
  *
- * FUNCTION:    find the first free bit in a word starting at
+ * FUNCTION:	find the first free bit in a word starting at
  *		the specified bit position.
  *
  * PARAMETERS:
- *      word	- word to be examined.
- *      start	- starting bit position.
+ *	word	- word to be examined.
+ *	start	- starting bit position.
  *
  * RETURN VALUES:
- *      bit position of first free bit in the word or 32 if
+ *	bit position of first free bit in the word or 32 if
  *	no free bits were found.
  */
 static int diFindFree(u32 word, int start)
@@ -2897,7 +2883,7 @@ int diExtendFS(struct inode *ipimap, struct inode *ipbmap)
 		   atomic_read(&imap->im_numfree));
 
 	/*
-	 *      reconstruct imap
+	 *	reconstruct imap
 	 *
 	 * coalesce contiguous k (newAGSize/oldAGSize) AGs;
 	 * i.e., (AGi, ..., AGj) where i = k*n and j = k*(n+1) - 1 to AGn;
@@ -2913,7 +2899,7 @@ int diExtendFS(struct inode *ipimap, struct inode *ipbmap)
 	}
 
 	/*
-	 *      process each iag page of the map.
+	 *	process each iag page of the map.
 	 *
 	 * rebuild AG Free Inode List, AG Free Inode Extent List;
 	 */
@@ -2932,7 +2918,7 @@ int diExtendFS(struct inode *ipimap, struct inode *ipbmap)
 
 		/* leave free iag in the free iag list */
 		if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG)) {
-		        release_metapage(bp);
+			release_metapage(bp);
 			continue;
 		}
 
@@ -3063,13 +3049,13 @@ static void duplicateIXtree(struct super_block *sb, s64 blkno,
 }
 
 /*
- * NAME:        copy_from_dinode()
+ * NAME:	copy_from_dinode()
  *
- * FUNCTION:    Copies inode info from disk inode to in-memory inode
+ * FUNCTION:	Copies inode info from disk inode to in-memory inode
  *
  * RETURN VALUES:
- *      0       - success
- *      -ENOMEM	- insufficient memory
+ *	0	- success
+ *	-ENOMEM	- insufficient memory
  */
 static int copy_from_dinode(struct dinode * dip, struct inode *ip)
 {
@@ -3151,9 +3137,9 @@ static int copy_from_dinode(struct dinode * dip, struct inode *ip)
 }
 
 /*
- * NAME:        copy_to_dinode()
+ * NAME:	copy_to_dinode()
  *
- * FUNCTION:    Copies inode info from in-memory inode to disk inode
+ * FUNCTION:	Copies inode info from in-memory inode to disk inode
  */
 static void copy_to_dinode(struct dinode * dip, struct inode *ip)
 {
diff --git a/fs/jfs/jfs_imap.h b/fs/jfs/jfs_imap.h
index 4f9c346..610a0e9 100644
--- a/fs/jfs/jfs_imap.h
+++ b/fs/jfs/jfs_imap.h
@@ -24,17 +24,17 @@
  *	jfs_imap.h: disk inode manager
  */
 
-#define	EXTSPERIAG	128	/* number of disk inode extent per iag  */
-#define IMAPBLKNO	0	/* lblkno of dinomap within inode map   */
-#define SMAPSZ		4	/* number of words per summary map      */
+#define	EXTSPERIAG	128	/* number of disk inode extent per iag	*/
+#define IMAPBLKNO	0	/* lblkno of dinomap within inode map	*/
+#define SMAPSZ		4	/* number of words per summary map	*/
 #define	EXTSPERSUM	32	/* number of extents per summary map entry */
 #define	L2EXTSPERSUM	5	/* l2 number of extents per summary map */
 #define	PGSPERIEXT	4	/* number of 4K pages per dinode extent */
-#define	MAXIAGS		((1<<20)-1)	/* maximum number of iags       */
-#define	MAXAG		128	/* maximum number of allocation groups  */
+#define	MAXIAGS		((1<<20)-1)	/* maximum number of iags	*/
+#define	MAXAG		128	/* maximum number of allocation groups	*/
 
-#define AMAPSIZE      512	/* bytes in the IAG allocation maps */
-#define SMAPSIZE      16	/* bytes in the IAG summary maps */
+#define AMAPSIZE	512	/* bytes in the IAG allocation maps */
+#define SMAPSIZE	16	/* bytes in the IAG summary maps */
 
 /* convert inode number to iag number */
 #define	INOTOIAG(ino)	((ino) >> L2INOSPERIAG)
@@ -60,31 +60,31 @@
  *	inode allocation group page (per 4096 inodes of an AG)
  */
 struct iag {
-	__le64 agstart;		/* 8: starting block of ag              */
-	__le32 iagnum;		/* 4: inode allocation group number     */
-	__le32 inofreefwd;	/* 4: ag inode free list forward        */
-	__le32 inofreeback;	/* 4: ag inode free list back           */
-	__le32 extfreefwd;	/* 4: ag inode extent free list forward */
-	__le32 extfreeback;	/* 4: ag inode extent free list back    */
-	__le32 iagfree;		/* 4: iag free list                     */
+	__le64 agstart;		/* 8: starting block of ag		*/
+	__le32 iagnum;		/* 4: inode allocation group number	*/
+	__le32 inofreefwd;	/* 4: ag inode free list forward	*/
+	__le32 inofreeback;	/* 4: ag inode free list back		*/
+	__le32 extfreefwd;	/* 4: ag inode extent free list forward	*/
+	__le32 extfreeback;	/* 4: ag inode extent free list back	*/
+	__le32 iagfree;		/* 4: iag free list			*/
 
 	/* summary map: 1 bit per inode extent */
 	__le32 inosmap[SMAPSZ];	/* 16: sum map of mapwords w/ free inodes;
-				 *      note: this indicates free and backed
-				 *      inodes, if the extent is not backed the
-				 *      value will be 1.  if the extent is
-				 *      backed but all inodes are being used the
-				 *      value will be 1.  if the extent is
-				 *      backed but at least one of the inodes is
-				 *      free the value will be 0.
+				 *	note: this indicates free and backed
+				 *	inodes, if the extent is not backed the
+				 *	value will be 1.  if the extent is
+				 *	backed but all inodes are being used the
+				 *	value will be 1.  if the extent is
+				 *	backed but at least one of the inodes is
+				 *	free the value will be 0.
 				 */
 	__le32 extsmap[SMAPSZ];	/* 16: sum map of mapwords w/ free extents */
-	__le32 nfreeinos;		/* 4: number of free inodes             */
-	__le32 nfreeexts;		/* 4: number of free extents            */
+	__le32 nfreeinos;	/* 4: number of free inodes		*/
+	__le32 nfreeexts;	/* 4: number of free extents		*/
 	/* (72) */
 	u8 pad[1976];		/* 1976: pad to 2048 bytes */
 	/* allocation bit map: 1 bit per inode (0 - free, 1 - allocated) */
-	__le32 wmap[EXTSPERIAG];	/* 512: working allocation map  */
+	__le32 wmap[EXTSPERIAG];	/* 512: working allocation map */
 	__le32 pmap[EXTSPERIAG];	/* 512: persistent allocation map */
 	pxd_t inoext[EXTSPERIAG];	/* 1024: inode extent addresses */
 };				/* (4096) */
@@ -93,44 +93,44 @@ struct iag {
  *	per AG control information (in inode map control page)
  */
 struct iagctl_disk {
-	__le32 inofree;		/* 4: free inode list anchor            */
-	__le32 extfree;		/* 4: free extent list anchor           */
-	__le32 numinos;		/* 4: number of backed inodes           */
-	__le32 numfree;		/* 4: number of free inodes             */
+	__le32 inofree;		/* 4: free inode list anchor		*/
+	__le32 extfree;		/* 4: free extent list anchor		*/
+	__le32 numinos;		/* 4: number of backed inodes		*/
+	__le32 numfree;		/* 4: number of free inodes		*/
 };				/* (16) */
 
 struct iagctl {
-	int inofree;		/* free inode list anchor            */
-	int extfree;		/* free extent list anchor           */
-	int numinos;		/* number of backed inodes           */
-	int numfree;		/* number of free inodes             */
+	int inofree;		/* free inode list anchor		*/
+	int extfree;		/* free extent list anchor		*/
+	int numinos;		/* number of backed inodes		*/
+	int numfree;		/* number of free inodes		*/
 };
 
 /*
  *	per fileset/aggregate inode map control page
  */
 struct dinomap_disk {
-	__le32 in_freeiag;	/* 4: free iag list anchor     */
-	__le32 in_nextiag;	/* 4: next free iag number     */
-	__le32 in_numinos;	/* 4: num of backed inodes */
+	__le32 in_freeiag;	/* 4: free iag list anchor	*/
+	__le32 in_nextiag;	/* 4: next free iag number	*/
+	__le32 in_numinos;	/* 4: num of backed inodes	*/
 	__le32 in_numfree;	/* 4: num of free backed inodes */
 	__le32 in_nbperiext;	/* 4: num of blocks per inode extent */
-	__le32 in_l2nbperiext;	/* 4: l2 of in_nbperiext */
-	__le32 in_diskblock;	/* 4: for standalone test driver  */
-	__le32 in_maxag;	/* 4: for standalone test driver  */
-	u8 pad[2016];		/* 2016: pad to 2048 */
+	__le32 in_l2nbperiext;	/* 4: l2 of in_nbperiext	*/
+	__le32 in_diskblock;	/* 4: for standalone test driver */
+	__le32 in_maxag;	/* 4: for standalone test driver */
+	u8 pad[2016];		/* 2016: pad to 2048		*/
 	struct iagctl_disk in_agctl[MAXAG]; /* 2048: AG control information */
 };				/* (4096) */
 
 struct dinomap {
-	int in_freeiag;		/* free iag list anchor     */
-	int in_nextiag;		/* next free iag number     */
-	int in_numinos;		/* num of backed inodes */
-	int in_numfree;		/* num of free backed inodes */
+	int in_freeiag;		/* free iag list anchor		*/
+	int in_nextiag;		/* next free iag number		*/
+	int in_numinos;		/* num of backed inodes		*/
+	int in_numfree;		/* num of free backed inodes	*/
 	int in_nbperiext;	/* num of blocks per inode extent */
-	int in_l2nbperiext;	/* l2 of in_nbperiext */
-	int in_diskblock;	/* for standalone test driver  */
-	int in_maxag;		/* for standalone test driver  */
+	int in_l2nbperiext;	/* l2 of in_nbperiext		*/
+	int in_diskblock;	/* for standalone test driver	*/
+	int in_maxag;		/* for standalone test driver	*/
 	struct iagctl in_agctl[MAXAG];	/* AG control information */
 };
 
@@ -139,9 +139,9 @@ struct dinomap {
  */
 struct inomap {
 	struct dinomap im_imap;		/* 4096: inode allocation control */
-	struct inode *im_ipimap;	/* 4: ptr to inode for imap   */
-	struct mutex im_freelock;	/* 4: iag free list lock      */
-	struct mutex im_aglock[MAXAG];	/* 512: per AG locks          */
+	struct inode *im_ipimap;	/* 4: ptr to inode for imap	*/
+	struct mutex im_freelock;	/* 4: iag free list lock	*/
+	struct mutex im_aglock[MAXAG];	/* 512: per AG locks		*/
 	u32 *im_DBGdimap;
 	atomic_t im_numinos;	/* num of backed inodes */
 	atomic_t im_numfree;	/* num of free backed inodes */
diff --git a/fs/jfs/jfs_incore.h b/fs/jfs/jfs_incore.h
index 8f453ef..cb8f309 100644
--- a/fs/jfs/jfs_incore.h
+++ b/fs/jfs/jfs_incore.h
@@ -40,7 +40,7 @@ struct jfs_inode_info {
 	uint	mode2;		/* jfs-specific mode		*/
 	uint	saved_uid;	/* saved for uid mount option */
 	uint	saved_gid;	/* saved for gid mount option */
-	pxd_t   ixpxd;		/* inode extent descriptor	*/
+	pxd_t	ixpxd;		/* inode extent descriptor	*/
 	dxd_t	acl;		/* dxd describing acl	*/
 	dxd_t	ea;		/* dxd describing ea	*/
 	time_t	otime;		/* time created	*/
@@ -190,7 +190,7 @@ struct jfs_sb_info {
 	uint		gengen;		/* inode generation generator*/
 	uint		inostamp;	/* shows inode belongs to fileset*/
 
-        /* Formerly in ipbmap */
+	/* Formerly in ipbmap */
 	struct bmap	*bmap;		/* incore bmap descriptor	*/
 	struct nls_table *nls_tab;	/* current codepage		*/
 	struct inode *direct_inode;	/* metadata inode */
diff --git a/fs/jfs/jfs_inode.h b/fs/jfs/jfs_inode.h
index 2374b59..f0ec72b 100644
--- a/fs/jfs/jfs_inode.h
+++ b/fs/jfs/jfs_inode.h
@@ -32,6 +32,7 @@ extern void jfs_truncate_nolock(struct inode *, loff_t);
 extern void jfs_free_zero_link(struct inode *);
 extern struct dentry *jfs_get_parent(struct dentry *dentry);
 extern void jfs_get_inode_flags(struct jfs_inode_info *);
+extern struct dentry *jfs_get_dentry(struct super_block *sb, void *vobjp);
 extern void jfs_set_inode_flags(struct inode *);
 extern int jfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
 
diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index 44a2f33..de3e4a5 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -244,7 +244,7 @@ int lmLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 		goto writeRecord;
 
 	/*
-	 *      initialize/update page/transaction recovery lsn
+	 *	initialize/update page/transaction recovery lsn
 	 */
 	lsn = log->lsn;
 
@@ -263,7 +263,7 @@ int lmLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 	}
 
 	/*
-	 *      initialize/update lsn of tblock of the page
+	 *	initialize/update lsn of tblock of the page
 	 *
 	 * transaction inherits oldest lsn of pages associated
 	 * with allocation/deallocation of resources (their
@@ -307,7 +307,7 @@ int lmLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 	LOGSYNC_UNLOCK(log, flags);
 
 	/*
-	 *      write the log record
+	 *	write the log record
 	 */
       writeRecord:
 	lsn = lmWriteRecord(log, tblk, lrd, tlck);
@@ -372,7 +372,7 @@ lmWriteRecord(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 		goto moveLrd;
 
 	/*
-	 *      move log record data
+	 *	move log record data
 	 */
 	/* retrieve source meta-data page to log */
 	if (tlck->flag & tlckPAGELOCK) {
@@ -465,7 +465,7 @@ lmWriteRecord(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 	}
 
 	/*
-	 *      move log record descriptor
+	 *	move log record descriptor
 	 */
       moveLrd:
 	lrd->length = cpu_to_le16(len);
@@ -574,7 +574,7 @@ static int lmNextPage(struct jfs_log * log)
 	LOGGC_LOCK(log);
 
 	/*
-	 *      write or queue the full page at the tail of write queue
+	 *	write or queue the full page at the tail of write queue
 	 */
 	/* get the tail tblk on commit queue */
 	if (list_empty(&log->cqueue))
@@ -625,7 +625,7 @@ static int lmNextPage(struct jfs_log * log)
 	LOGGC_UNLOCK(log);
 
 	/*
-	 *      allocate/initialize next page
+	 *	allocate/initialize next page
 	 */
 	/* if log wraps, the first data page of log is 2
 	 * (0 never used, 1 is superblock).
@@ -953,7 +953,7 @@ static int lmLogSync(struct jfs_log * log, int hard_sync)
 		}
 
 	/*
-	 *      forward syncpt
+	 *	forward syncpt
 	 */
 	/* if last sync is same as last syncpt,
 	 * invoke sync point forward processing to update sync.
@@ -989,7 +989,7 @@ static int lmLogSync(struct jfs_log * log, int hard_sync)
 		lsn = log->lsn;
 
 	/*
-	 *      setup next syncpt trigger (SWAG)
+	 *	setup next syncpt trigger (SWAG)
 	 */
 	logsize = log->logsize;
 
@@ -1000,11 +1000,11 @@ static int lmLogSync(struct jfs_log * log, int hard_sync)
 	if (more < 2 * LOGPSIZE) {
 		jfs_warn("\n ... Log Wrap ... Log Wrap ... Log Wrap ...\n");
 		/*
-		 *      log wrapping
+		 *	log wrapping
 		 *
 		 * option 1 - panic ? No.!
 		 * option 2 - shutdown file systems
-		 *            associated with log ?
+		 *	      associated with log ?
 		 * option 3 - extend log ?
 		 */
 		/*
@@ -1062,7 +1062,7 @@ void jfs_syncpt(struct jfs_log *log, int hard_sync)
 /*
  * NAME:	lmLogOpen()
  *
- * FUNCTION:    open the log on first open;
+ * FUNCTION:	open the log on first open;
  *	insert filesystem in the active list of the log.
  *
  * PARAMETER:	ipmnt	- file system mount inode
@@ -1113,7 +1113,7 @@ int lmLogOpen(struct super_block *sb)
 	init_waitqueue_head(&log->syncwait);
 
 	/*
-	 *      external log as separate logical volume
+	 *	external log as separate logical volume
 	 *
 	 * file systems to log may have n-to-1 relationship;
 	 */
@@ -1155,7 +1155,7 @@ journal_found:
 	return 0;
 
 	/*
-	 *      unwind on error
+	 *	unwind on error
 	 */
       shutdown:		/* unwind lbmLogInit() */
 	list_del(&log->journal_list);
@@ -1427,7 +1427,7 @@ int lmLogInit(struct jfs_log * log)
 	return 0;
 
 	/*
-	 *      unwind on error
+	 *	unwind on error
 	 */
       errout30:		/* release log page */
 	log->wqueue = NULL;
@@ -1480,7 +1480,7 @@ int lmLogClose(struct super_block *sb)
 
 	if (test_bit(log_INLINELOG, &log->flag)) {
 		/*
-		 *      in-line log in host file system
+		 *	in-line log in host file system
 		 */
 		rc = lmLogShutdown(log);
 		kfree(log);
@@ -1504,7 +1504,7 @@ int lmLogClose(struct super_block *sb)
 		goto out;
 
 	/*
-	 *      external log as separate logical volume
+	 *	external log as separate logical volume
 	 */
 	list_del(&log->journal_list);
 	bdev = log->bdev;
@@ -1622,20 +1622,26 @@ void jfs_flush_journal(struct jfs_log *log, int wait)
 	if (!list_empty(&log->synclist)) {
 		struct logsyncblk *lp;
 
+		printk(KERN_ERR "jfs_flush_journal: synclist not empty\n");
 		list_for_each_entry(lp, &log->synclist, synclist) {
 			if (lp->xflag & COMMIT_PAGE) {
 				struct metapage *mp = (struct metapage *)lp;
-				dump_mem("orphan metapage", lp,
-					 sizeof(struct metapage));
-				dump_mem("page", mp->page, sizeof(struct page));
-			}
-			else
-				dump_mem("orphan tblock", lp,
-					 sizeof(struct tblock));
+				print_hex_dump(KERN_ERR, "metapage: ",
+					       DUMP_PREFIX_ADDRESS, 16, 4,
+					       mp, sizeof(struct metapage), 0);
+				print_hex_dump(KERN_ERR, "page: ",
+					       DUMP_PREFIX_ADDRESS, 16,
+					       sizeof(long), mp->page,
+					       sizeof(struct page), 0);
+			} else
+				print_hex_dump(KERN_ERR, "tblock:",
+					       DUMP_PREFIX_ADDRESS, 16, 4,
+					       lp, sizeof(struct tblock), 0);
 		}
 	}
+#else
+	WARN_ON(!list_empty(&log->synclist));
 #endif
-	//assert(list_empty(&log->synclist));
 	clear_bit(log_FLUSH, &log->flag);
 }
 
@@ -1723,7 +1729,7 @@ int lmLogShutdown(struct jfs_log * log)
  *
  * PARAMETE:	log	- pointer to logs inode.
  *		fsdev	- kdev_t of filesystem.
- *		serial  - pointer to returned log serial number
+ *		serial	- pointer to returned log serial number
  *		activate - insert/remove device from active list.
  *
  * RETURN:	0	- success
@@ -1963,7 +1969,7 @@ static void lbmfree(struct lbuf * bp)
  * FUNCTION:	add a log buffer to the log redrive list
  *
  * PARAMETER:
- *     bp	- log buffer
+ *	bp	- log buffer
  *
  * NOTES:
  *	Takes log_redrive_lock.
@@ -2054,7 +2060,7 @@ static void lbmWrite(struct jfs_log * log, struct lbuf * bp, int flag,
 	bp->l_flag = flag;
 
 	/*
-	 *      insert bp at tail of write queue associated with log
+	 *	insert bp at tail of write queue associated with log
 	 *
 	 * (request is either for bp already/currently at head of queue
 	 * or new bp to be inserted at tail)
@@ -2117,7 +2123,7 @@ static void lbmDirectWrite(struct jfs_log * log, struct lbuf * bp, int flag)
 	    log->base + (bp->l_pn << (L2LOGPSIZE - log->l2bsize));
 
 	/*
-	 *      initiate pageout of the page
+	 *	initiate pageout of the page
 	 */
 	lbmStartIO(bp);
 }
@@ -2128,7 +2134,7 @@ static void lbmDirectWrite(struct jfs_log * log, struct lbuf * bp, int flag)
  *
  * FUNCTION:	Interface to DD strategy routine
  *
- * RETURN:      none
+ * RETURN:	none
  *
  * serialization: LCACHE_LOCK() is NOT held during log i/o;
  */
@@ -2222,7 +2228,7 @@ static int lbmIODone(struct bio *bio, unsigned int bytes_done, int error)
 	bio_put(bio);
 
 	/*
-	 *      pagein completion
+	 *	pagein completion
 	 */
 	if (bp->l_flag & lbmREAD) {
 		bp->l_flag &= ~lbmREAD;
@@ -2236,7 +2242,7 @@ static int lbmIODone(struct bio *bio, unsigned int bytes_done, int error)
 	}
 
 	/*
-	 *      pageout completion
+	 *	pageout completion
 	 *
 	 * the bp at the head of write queue has completed pageout.
 	 *
@@ -2302,7 +2308,7 @@ static int lbmIODone(struct bio *bio, unsigned int bytes_done, int error)
 	}
 
 	/*
-	 *      synchronous pageout:
+	 *	synchronous pageout:
 	 *
 	 * buffer has not necessarily been removed from write queue
 	 * (e.g., synchronous write of partial-page with COMMIT):
@@ -2316,7 +2322,7 @@ static int lbmIODone(struct bio *bio, unsigned int bytes_done, int error)
 	}
 
 	/*
-	 *      Group Commit pageout:
+	 *	Group Commit pageout:
 	 */
 	else if (bp->l_flag & lbmGC) {
 		LCACHE_UNLOCK(flags);
@@ -2324,7 +2330,7 @@ static int lbmIODone(struct bio *bio, unsigned int bytes_done, int error)
 	}
 
 	/*
-	 *      asynchronous pageout:
+	 *	asynchronous pageout:
 	 *
 	 * buffer must have been removed from write queue:
 	 * insert buffer at head of freelist where it can be recycled
@@ -2375,7 +2381,7 @@ int jfsIOWait(void *arg)
  * FUNCTION:	format file system log
  *
  * PARAMETERS:
- *      log	- volume log
+ *	log	- volume log
  *	logAddress - start address of log space in FS block
  *	logSize	- length of log space in FS block;
  *
@@ -2407,16 +2413,16 @@ int lmLogFormat(struct jfs_log *log, s64 logAddress, int logSize)
 	npages = logSize >> sbi->l2nbperpage;
 
 	/*
-	 *      log space:
+	 *	log space:
 	 *
 	 * page 0 - reserved;
 	 * page 1 - log superblock;
 	 * page 2 - log data page: A SYNC log record is written
-	 *          into this page at logform time;
+	 *	    into this page at logform time;
 	 * pages 3-N - log data page: set to empty log data pages;
 	 */
 	/*
-	 *      init log superblock: log page 1
+	 *	init log superblock: log page 1
 	 */
 	logsuper = (struct logsuper *) bp->l_ldata;
 
@@ -2436,7 +2442,7 @@ int lmLogFormat(struct jfs_log *log, s64 logAddress, int logSize)
 		goto exit;
 
 	/*
-	 *      init pages 2 to npages-1 as log data pages:
+	 *	init pages 2 to npages-1 as log data pages:
 	 *
 	 * log page sequence number (lpsn) initialization:
 	 *
@@ -2479,7 +2485,7 @@ int lmLogFormat(struct jfs_log *log, s64 logAddress, int logSize)
 		goto exit;
 
 	/*
-	 *      initialize succeeding log pages: lpsn = 0, 1, ..., (N-2)
+	 *	initialize succeeding log pages: lpsn = 0, 1, ..., (N-2)
 	 */
 	for (lspn = 0; lspn < npages - 3; lspn++) {
 		lp->h.page = lp->t.page = cpu_to_le32(lspn);
@@ -2495,7 +2501,7 @@ int lmLogFormat(struct jfs_log *log, s64 logAddress, int logSize)
 	rc = 0;
 exit:
 	/*
-	 *      finalize log
+	 *	finalize log
 	 */
 	/* release the buffer */
 	lbmFree(bp);
diff --git a/fs/jfs/jfs_logmgr.h b/fs/jfs/jfs_logmgr.h
index a53fb17..1f85ef0 100644
--- a/fs/jfs/jfs_logmgr.h
+++ b/fs/jfs/jfs_logmgr.h
@@ -144,7 +144,7 @@ struct logpage {
  *
  * (this comment should be rewritten !)
  * jfs uses only "after" log records (only a single writer is allowed
- * in a  page, pages are written to temporary paging space if
+ * in a page, pages are written to temporary paging space if
  * if they must be written to disk before commit, and i/o is
  * scheduled for modified pages to their home location after
  * the log records containing the after values and the commit
@@ -153,7 +153,7 @@ struct logpage {
  *
  * a log record consists of a data area of variable length followed by
  * a descriptor of fixed size LOGRDSIZE bytes.
- * the  data area is rounded up to an integral number of 4-bytes and
+ * the data area is rounded up to an integral number of 4-bytes and
  * must be no longer than LOGPSIZE.
  * the descriptor is of size of multiple of 4-bytes and aligned on a
  * 4-byte boundary.
@@ -215,13 +215,13 @@ struct lrd {
 	union {
 
 		/*
-		 *      COMMIT: commit
+		 *	COMMIT: commit
 		 *
 		 * transaction commit: no type-dependent information;
 		 */
 
 		/*
-		 *      REDOPAGE: after-image
+		 *	REDOPAGE: after-image
 		 *
 		 * apply after-image;
 		 *
@@ -236,7 +236,7 @@ struct lrd {
 		} redopage;	/* (20) */
 
 		/*
-		 *      NOREDOPAGE: the page is freed
+		 *	NOREDOPAGE: the page is freed
 		 *
 		 * do not apply after-image records which precede this record
 		 * in the log with the same page block number to this page.
@@ -252,7 +252,7 @@ struct lrd {
 		} noredopage;	/* (20) */
 
 		/*
-		 *      UPDATEMAP: update block allocation map
+		 *	UPDATEMAP: update block allocation map
 		 *
 		 * either in-line PXD,
 		 * or     out-of-line  XADLIST;
@@ -268,7 +268,7 @@ struct lrd {
 		} updatemap;	/* (20) */
 
 		/*
-		 *      NOREDOINOEXT: the inode extent is freed
+		 *	NOREDOINOEXT: the inode extent is freed
 		 *
 		 * do not apply after-image records which precede this
 		 * record in the log with the any of the 4 page block
@@ -286,7 +286,7 @@ struct lrd {
 		} noredoinoext;	/* (20) */
 
 		/*
-		 *      SYNCPT: log sync point
+		 *	SYNCPT: log sync point
 		 *
 		 * replay log upto syncpt address specified;
 		 */
@@ -295,13 +295,13 @@ struct lrd {
 		} syncpt;
 
 		/*
-		 *      MOUNT: file system mount
+		 *	MOUNT: file system mount
 		 *
 		 * file system mount: no type-dependent information;
 		 */
 
 		/*
-		 *      ? FREEXTENT: free specified extent(s)
+		 *	? FREEXTENT: free specified extent(s)
 		 *
 		 * free specified extent(s) from block allocation map
 		 * N.B.: nextents should be length of data/sizeof(xad_t)
@@ -314,7 +314,7 @@ struct lrd {
 		} freextent;
 
 		/*
-		 *      ? NOREDOFILE: this file is freed
+		 *	? NOREDOFILE: this file is freed
 		 *
 		 * do not apply records which precede this record in the log
 		 * with the same inode number.
@@ -330,7 +330,7 @@ struct lrd {
 		} noredofile;
 
 		/*
-		 *      ? NEWPAGE:
+		 *	? NEWPAGE:
 		 *
 		 * metadata type dependent
 		 */
@@ -342,7 +342,7 @@ struct lrd {
 		} newpage;
 
 		/*
-		 *      ? DUMMY: filler
+		 *	? DUMMY: filler
 		 *
 		 * no type-dependent information
 		 */
diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c
index 43d4f69..77c7f11 100644
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -472,7 +472,8 @@ add_failed:
 	printk(KERN_ERR "JFS: bio_add_page failed unexpectedly\n");
 	goto skip;
 dump_bio:
-	dump_mem("bio", bio, sizeof(*bio));
+	print_hex_dump(KERN_ERR, "JFS: dump of bio: ", DUMP_PREFIX_ADDRESS, 16,
+		       4, bio, sizeof(*bio), 0);
 skip:
 	bio_put(bio);
 	unlock_page(page);
diff --git a/fs/jfs/jfs_mount.c b/fs/jfs/jfs_mount.c
index 4dd4798..644429a 100644
--- a/fs/jfs/jfs_mount.c
+++ b/fs/jfs/jfs_mount.c
@@ -80,7 +80,7 @@ static int logMOUNT(struct super_block *sb);
  */
 int jfs_mount(struct super_block *sb)
 {
-	int rc = 0;		/* Return code          */
+	int rc = 0;		/* Return code */
 	struct jfs_sb_info *sbi = JFS_SBI(sb);
 	struct inode *ipaimap = NULL;
 	struct inode *ipaimap2 = NULL;
@@ -169,7 +169,7 @@ int jfs_mount(struct super_block *sb)
 		sbi->ipaimap2 = NULL;
 
 	/*
-	 *      mount (the only/single) fileset
+	 *	mount (the only/single) fileset
 	 */
 	/*
 	 * open fileset inode allocation map (aka fileset inode)
@@ -195,7 +195,7 @@ int jfs_mount(struct super_block *sb)
 	goto out;
 
 	/*
-	 *      unwind on error
+	 *	unwind on error
 	 */
       errout41:		/* close fileset inode allocation map inode */
 	diFreeSpecial(ipimap);
diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
index 25430d0..7aa1f70 100644
--- a/fs/jfs/jfs_txnmgr.c
+++ b/fs/jfs/jfs_txnmgr.c
@@ -18,7 +18,7 @@
  */
 
 /*
- *      jfs_txnmgr.c: transaction manager
+ *	jfs_txnmgr.c: transaction manager
  *
  * notes:
  * transaction starts with txBegin() and ends with txCommit()
@@ -60,7 +60,7 @@
 #include "jfs_debug.h"
 
 /*
- *      transaction management structures
+ *	transaction management structures
  */
 static struct {
 	int freetid;		/* index of a free tid structure */
@@ -103,19 +103,19 @@ module_param(nTxLock, int, 0);
 MODULE_PARM_DESC(nTxLock,
 		 "Number of transaction locks (max:65536)");
 
-struct tblock *TxBlock;	        /* transaction block table */
-static int TxLockLWM;		/* Low water mark for number of txLocks used */
-static int TxLockHWM;		/* High water mark for number of txLocks used */
-static int TxLockVHWM;		/* Very High water mark */
-struct tlock *TxLock;           /* transaction lock table */
+struct tblock *TxBlock;	/* transaction block table */
+static int TxLockLWM;	/* Low water mark for number of txLocks used */
+static int TxLockHWM;	/* High water mark for number of txLocks used */
+static int TxLockVHWM;	/* Very High water mark */
+struct tlock *TxLock;	/* transaction lock table */
 
 /*
- *      transaction management lock
+ *	transaction management lock
  */
 static DEFINE_SPINLOCK(jfsTxnLock);
 
-#define TXN_LOCK()              spin_lock(&jfsTxnLock)
-#define TXN_UNLOCK()            spin_unlock(&jfsTxnLock)
+#define TXN_LOCK()		spin_lock(&jfsTxnLock)
+#define TXN_UNLOCK()		spin_unlock(&jfsTxnLock)
 
 #define LAZY_LOCK_INIT()	spin_lock_init(&TxAnchor.LazyLock);
 #define LAZY_LOCK(flags)	spin_lock_irqsave(&TxAnchor.LazyLock, flags)
@@ -148,7 +148,7 @@ static inline void TXN_SLEEP_DROP_LOCK(wait_queue_head_t * event)
 #define TXN_WAKEUP(event) wake_up_all(event)
 
 /*
- *      statistics
+ *	statistics
  */
 static struct {
 	tid_t maxtid;		/* 4: biggest tid ever used */
@@ -181,8 +181,8 @@ static void xtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 static void LogSyncRelease(struct metapage * mp);
 
 /*
- *              transaction block/lock management
- *              ---------------------------------
+ *		transaction block/lock management
+ *		---------------------------------
  */
 
 /*
@@ -227,9 +227,9 @@ static void txLockFree(lid_t lid)
 }
 
 /*
- * NAME:        txInit()
+ * NAME:	txInit()
  *
- * FUNCTION:    initialize transaction management structures
+ * FUNCTION:	initialize transaction management structures
  *
  * RETURN:
  *
@@ -333,9 +333,9 @@ int txInit(void)
 }
 
 /*
- * NAME:        txExit()
+ * NAME:	txExit()
  *
- * FUNCTION:    clean up when module is unloaded
+ * FUNCTION:	clean up when module is unloaded
  */
 void txExit(void)
 {
@@ -346,12 +346,12 @@ void txExit(void)
 }
 
 /*
- * NAME:        txBegin()
+ * NAME:	txBegin()
  *
- * FUNCTION:    start a transaction.
+ * FUNCTION:	start a transaction.
  *
- * PARAMETER:   sb	- superblock
- *              flag	- force for nested tx;
+ * PARAMETER:	sb	- superblock
+ *		flag	- force for nested tx;
  *
  * RETURN:	tid	- transaction id
  *
@@ -447,13 +447,13 @@ tid_t txBegin(struct super_block *sb, int flag)
 }
 
 /*
- * NAME:        txBeginAnon()
+ * NAME:	txBeginAnon()
  *
- * FUNCTION:    start an anonymous transaction.
+ * FUNCTION:	start an anonymous transaction.
  *		Blocks if logsync or available tlocks are low to prevent
  *		anonymous tlocks from depleting supply.
  *
- * PARAMETER:   sb	- superblock
+ * PARAMETER:	sb	- superblock
  *
  * RETURN:	none
  */
@@ -489,11 +489,11 @@ void txBeginAnon(struct super_block *sb)
 }
 
 /*
- *      txEnd()
+ *	txEnd()
  *
  * function: free specified transaction block.
  *
- *      logsync barrier processing:
+ *	logsync barrier processing:
  *
  * serialization:
  */
@@ -577,13 +577,13 @@ wakeup:
 }
 
 /*
- *      txLock()
+ *	txLock()
  *
  * function: acquire a transaction lock on the specified <mp>
  *
  * parameter:
  *
- * return:      transaction lock id
+ * return:	transaction lock id
  *
  * serialization:
  */
@@ -829,12 +829,16 @@ struct tlock *txLock(tid_t tid, struct inode *ip, struct metapage * mp,
 	/* Only locks on ipimap or ipaimap should reach here */
 	/* assert(jfs_ip->fileset == AGGREGATE_I); */
 	if (jfs_ip->fileset != AGGREGATE_I) {
-		jfs_err("txLock: trying to lock locked page!");
-		dump_mem("ip", ip, sizeof(struct inode));
-		dump_mem("mp", mp, sizeof(struct metapage));
-		dump_mem("Locker's tblk", tid_to_tblock(tid),
-			 sizeof(struct tblock));
-		dump_mem("Tlock", tlck, sizeof(struct tlock));
+		printk(KERN_ERR "txLock: trying to lock locked page!");
+		print_hex_dump(KERN_ERR, "ip: ", DUMP_PREFIX_ADDRESS, 16, 4,
+			       ip, sizeof(*ip), 0);
+		print_hex_dump(KERN_ERR, "mp: ", DUMP_PREFIX_ADDRESS, 16, 4,
+			       mp, sizeof(*mp), 0);
+		print_hex_dump(KERN_ERR, "Locker's tblock: ",
+			       DUMP_PREFIX_ADDRESS, 16, 4, tid_to_tblock(tid),
+			       sizeof(struct tblock), 0);
+		print_hex_dump(KERN_ERR, "Tlock: ", DUMP_PREFIX_ADDRESS, 16, 4,
+			       tlck, sizeof(*tlck), 0);
 		BUG();
 	}
 	INCREMENT(stattx.waitlock);	/* statistics */
@@ -857,17 +861,17 @@ struct tlock *txLock(tid_t tid, struct inode *ip, struct metapage * mp,
 }
 
 /*
- * NAME:        txRelease()
+ * NAME:	txRelease()
  *
- * FUNCTION:    Release buffers associated with transaction locks, but don't
+ * FUNCTION:	Release buffers associated with transaction locks, but don't
  *		mark homeok yet.  The allows other transactions to modify
  *		buffers, but won't let them go to disk until commit record
  *		actually gets written.
  *
  * PARAMETER:
- *              tblk    -
+ *		tblk	-
  *
- * RETURN:      Errors from subroutines.
+ * RETURN:	Errors from subroutines.
  */
 static void txRelease(struct tblock * tblk)
 {
@@ -896,10 +900,10 @@ static void txRelease(struct tblock * tblk)
 }
 
 /*
- * NAME:        txUnlock()
+ * NAME:	txUnlock()
  *
- * FUNCTION:    Initiates pageout of pages modified by tid in journalled
- *              objects and frees their lockwords.
+ * FUNCTION:	Initiates pageout of pages modified by tid in journalled
+ *		objects and frees their lockwords.
  */
 static void txUnlock(struct tblock * tblk)
 {
@@ -983,10 +987,10 @@ static void txUnlock(struct tblock * tblk)
 }
 
 /*
- *      txMaplock()
+ *	txMaplock()
  *
  * function: allocate a transaction lock for freed page/entry;
- *      for freed page, maplock is used as xtlock/dtlock type;
+ *	for freed page, maplock is used as xtlock/dtlock type;
  */
 struct tlock *txMaplock(tid_t tid, struct inode *ip, int type)
 {
@@ -1057,7 +1061,7 @@ struct tlock *txMaplock(tid_t tid, struct inode *ip, int type)
 }
 
 /*
- *      txLinelock()
+ *	txLinelock()
  *
  * function: allocate a transaction lock for log vector list
  */
@@ -1092,39 +1096,39 @@ struct linelock *txLinelock(struct linelock * tlock)
 }
 
 /*
- *              transaction commit management
- *              -----------------------------
+ *		transaction commit management
+ *		-----------------------------
  */
 
 /*
- * NAME:        txCommit()
- *
- * FUNCTION:    commit the changes to the objects specified in
- *              clist.  For journalled segments only the
- *              changes of the caller are committed, ie by tid.
- *              for non-journalled segments the data are flushed to
- *              disk and then the change to the disk inode and indirect
- *              blocks committed (so blocks newly allocated to the
- *              segment will be made a part of the segment atomically).
- *
- *              all of the segments specified in clist must be in
- *              one file system. no more than 6 segments are needed
- *              to handle all unix svcs.
- *
- *              if the i_nlink field (i.e. disk inode link count)
- *              is zero, and the type of inode is a regular file or
- *              directory, or symbolic link , the inode is truncated
- *              to zero length. the truncation is committed but the
- *              VM resources are unaffected until it is closed (see
- *              iput and iclose).
+ * NAME:	txCommit()
+ *
+ * FUNCTION:	commit the changes to the objects specified in
+ *		clist.  For journalled segments only the
+ *		changes of the caller are committed, ie by tid.
+ *		for non-journalled segments the data are flushed to
+ *		disk and then the change to the disk inode and indirect
+ *		blocks committed (so blocks newly allocated to the
+ *		segment will be made a part of the segment atomically).
+ *
+ *		all of the segments specified in clist must be in
+ *		one file system. no more than 6 segments are needed
+ *		to handle all unix svcs.
+ *
+ *		if the i_nlink field (i.e. disk inode link count)
+ *		is zero, and the type of inode is a regular file or
+ *		directory, or symbolic link , the inode is truncated
+ *		to zero length. the truncation is committed but the
+ *		VM resources are unaffected until it is closed (see
+ *		iput and iclose).
  *
  * PARAMETER:
  *
  * RETURN:
  *
  * serialization:
- *              on entry the inode lock on each segment is assumed
- *              to be held.
+ *		on entry the inode lock on each segment is assumed
+ *		to be held.
  *
  * i/o error:
  */
@@ -1175,7 +1179,7 @@ int txCommit(tid_t tid,		/* transaction identifier */
 	if ((flag & (COMMIT_FORCE | COMMIT_SYNC)) == 0)
 		tblk->xflag |= COMMIT_LAZY;
 	/*
-	 *      prepare non-journaled objects for commit
+	 *	prepare non-journaled objects for commit
 	 *
 	 * flush data pages of non-journaled file
 	 * to prevent the file getting non-initialized disk blocks
@@ -1186,7 +1190,7 @@ int txCommit(tid_t tid,		/* transaction identifier */
 	cd.nip = nip;
 
 	/*
-	 *      acquire transaction lock on (on-disk) inodes
+	 *	acquire transaction lock on (on-disk) inodes
 	 *
 	 * update on-disk inode from in-memory inode
 	 * acquiring transaction locks for AFTER records
@@ -1262,7 +1266,7 @@ int txCommit(tid_t tid,		/* transaction identifier */
 	}
 
 	/*
-	 *      write log records from transaction locks
+	 *	write log records from transaction locks
 	 *
 	 * txUpdateMap() resets XAD_NEW in XAD.
 	 */
@@ -1294,7 +1298,7 @@ int txCommit(tid_t tid,		/* transaction identifier */
 		!test_cflag(COMMIT_Nolink, tblk->u.ip)));
 
 	/*
-	 *      write COMMIT log record
+	 *	write COMMIT log record
 	 */
 	lrd->type = cpu_to_le16(LOG_COMMIT);
 	lrd->length = 0;
@@ -1303,7 +1307,7 @@ int txCommit(tid_t tid,		/* transaction identifier */
 	lmGroupCommit(log, tblk);
 
 	/*
-	 *      - transaction is now committed -
+	 *	- transaction is now committed -
 	 */
 
 	/*
@@ -1314,11 +1318,11 @@ int txCommit(tid_t tid,		/* transaction identifier */
 		txForce(tblk);
 
 	/*
-	 *      update allocation map.
+	 *	update allocation map.
 	 *
 	 * update inode allocation map and inode:
 	 * free pager lock on memory object of inode if any.
-	 * update  block allocation map.
+	 * update block allocation map.
 	 *
 	 * txUpdateMap() resets XAD_NEW in XAD.
 	 */
@@ -1326,7 +1330,7 @@ int txCommit(tid_t tid,		/* transaction identifier */
 		txUpdateMap(tblk);
 
 	/*
-	 *      free transaction locks and pageout/free pages
+	 *	free transaction locks and pageout/free pages
 	 */
 	txRelease(tblk);
 
@@ -1335,7 +1339,7 @@ int txCommit(tid_t tid,		/* transaction identifier */
 
 
 	/*
-	 *      reset in-memory object state
+	 *	reset in-memory object state
 	 */
 	for (k = 0; k < cd.nip; k++) {
 		ip = cd.iplist[k];
@@ -1358,11 +1362,11 @@ int txCommit(tid_t tid,		/* transaction identifier */
 }
 
 /*
- * NAME:        txLog()
+ * NAME:	txLog()
  *
- * FUNCTION:    Writes AFTER log records for all lines modified
- *              by tid for segments specified by inodes in comdata.
- *              Code assumes only WRITELOCKS are recorded in lockwords.
+ * FUNCTION:	Writes AFTER log records for all lines modified
+ *		by tid for segments specified by inodes in comdata.
+ *		Code assumes only WRITELOCKS are recorded in lockwords.
  *
  * PARAMETERS:
  *
@@ -1421,12 +1425,12 @@ static int txLog(struct jfs_log * log, struct tblock * tblk, struct commit * cd)
 }
 
 /*
- *      diLog()
+ *	diLog()
  *
- * function:    log inode tlock and format maplock to update bmap;
+ * function:	log inode tlock and format maplock to update bmap;
  */
 static int diLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
-	  struct tlock * tlck, struct commit * cd)
+		 struct tlock * tlck, struct commit * cd)
 {
 	int rc = 0;
 	struct metapage *mp;
@@ -1442,7 +1446,7 @@ static int diLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 	pxd = &lrd->log.redopage.pxd;
 
 	/*
-	 *      inode after image
+	 *	inode after image
 	 */
 	if (tlck->type & tlckENTRY) {
 		/* log after-image for logredo(): */
@@ -1456,7 +1460,7 @@ static int diLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 		tlck->flag |= tlckWRITEPAGE;
 	} else if (tlck->type & tlckFREE) {
 		/*
-		 *      free inode extent
+		 *	free inode extent
 		 *
 		 * (pages of the freed inode extent have been invalidated and
 		 * a maplock for free of the extent has been formatted at
@@ -1498,7 +1502,7 @@ static int diLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 		jfs_err("diLog: UFO type tlck:0x%p", tlck);
 #ifdef  _JFS_WIP
 	/*
-	 *      alloc/free external EA extent
+	 *	alloc/free external EA extent
 	 *
 	 * a maplock for txUpdateMap() to update bPWMAP for alloc/free
 	 * of the extent has been formatted at txLock() time;
@@ -1534,9 +1538,9 @@ static int diLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 }
 
 /*
- *      dataLog()
+ *	dataLog()
  *
- * function:    log data tlock
+ * function:	log data tlock
  */
 static int dataLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 	    struct tlock * tlck)
@@ -1580,9 +1584,9 @@ static int dataLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 }
 
 /*
- *      dtLog()
+ *	dtLog()
  *
- * function:    log dtree tlock and format maplock to update bmap;
+ * function:	log dtree tlock and format maplock to update bmap;
  */
 static void dtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 	   struct tlock * tlck)
@@ -1603,10 +1607,10 @@ static void dtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 		lrd->log.redopage.type |= cpu_to_le16(LOG_BTROOT);
 
 	/*
-	 *      page extension via relocation: entry insertion;
-	 *      page extension in-place: entry insertion;
-	 *      new right page from page split, reinitialized in-line
-	 *      root from root page split: entry insertion;
+	 *	page extension via relocation: entry insertion;
+	 *	page extension in-place: entry insertion;
+	 *	new right page from page split, reinitialized in-line
+	 *	root from root page split: entry insertion;
 	 */
 	if (tlck->type & (tlckNEW | tlckEXTEND)) {
 		/* log after-image of the new page for logredo():
@@ -1641,8 +1645,8 @@ static void dtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 	}
 
 	/*
-	 *      entry insertion/deletion,
-	 *      sibling page link update (old right page before split);
+	 *	entry insertion/deletion,
+	 *	sibling page link update (old right page before split);
 	 */
 	if (tlck->type & (tlckENTRY | tlckRELINK)) {
 		/* log after-image for logredo(): */
@@ -1658,11 +1662,11 @@ static void dtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 	}
 
 	/*
-	 *      page deletion: page has been invalidated
-	 *      page relocation: source extent
+	 *	page deletion: page has been invalidated
+	 *	page relocation: source extent
 	 *
-	 *      a maplock for free of the page has been formatted
-	 *      at txLock() time);
+	 *	a maplock for free of the page has been formatted
+	 *	at txLock() time);
 	 */
 	if (tlck->type & (tlckFREE | tlckRELOCATE)) {
 		/* log LOG_NOREDOPAGE of the deleted page for logredo()
@@ -1683,9 +1687,9 @@ static void dtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 }
 
 /*
- *      xtLog()
+ *	xtLog()
  *
- * function:    log xtree tlock and format maplock to update bmap;
+ * function:	log xtree tlock and format maplock to update bmap;
  */
 static void xtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 	   struct tlock * tlck)
@@ -1725,8 +1729,8 @@ static void xtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 	xadlock = (struct xdlistlock *) maplock;
 
 	/*
-	 *      entry insertion/extension;
-	 *      sibling page link update (old right page before split);
+	 *	entry insertion/extension;
+	 *	sibling page link update (old right page before split);
 	 */
 	if (tlck->type & (tlckNEW | tlckGROW | tlckRELINK)) {
 		/* log after-image for logredo():
@@ -1801,7 +1805,7 @@ static void xtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 	}
 
 	/*
-	 *      page deletion: file deletion/truncation (ref. xtTruncate())
+	 *	page deletion: file deletion/truncation (ref. xtTruncate())
 	 *
 	 * (page will be invalidated after log is written and bmap
 	 * is updated from the page);
@@ -1908,13 +1912,13 @@ static void xtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 	}
 
 	/*
-	 *      page/entry truncation: file truncation (ref. xtTruncate())
+	 *	page/entry truncation: file truncation (ref. xtTruncate())
 	 *
-	 *     |----------+------+------+---------------|
-	 *                |      |      |
-	 *                |      |     hwm - hwm before truncation
-	 *                |     next - truncation point
-	 *               lwm - lwm before truncation
+	 *	|----------+------+------+---------------|
+	 *		   |      |      |
+	 *		   |      |     hwm - hwm before truncation
+	 *		   |     next - truncation point
+	 *		  lwm - lwm before truncation
 	 * header ?
 	 */
 	if (tlck->type & tlckTRUNCATE) {
@@ -1937,7 +1941,7 @@ static void xtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 		twm = xtlck->twm.offset;
 
 		/*
-		 *      write log records
+		 *	write log records
 		 */
 		/* log after-image for logredo():
 		 *
@@ -1997,7 +2001,7 @@ static void xtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 		}
 
 		/*
-		 *      format maplock(s) for txUpdateMap() to update bmap
+		 *	format maplock(s) for txUpdateMap() to update bmap
 		 */
 		maplock->index = 0;
 
@@ -2069,9 +2073,9 @@ static void xtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 }
 
 /*
- *      mapLog()
+ *	mapLog()
  *
- * function:    log from maplock of freed data extents;
+ * function:	log from maplock of freed data extents;
  */
 static void mapLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 		   struct tlock * tlck)
@@ -2081,7 +2085,7 @@ static void mapLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 	pxd_t *pxd;
 
 	/*
-	 *      page relocation: free the source page extent
+	 *	page relocation: free the source page extent
 	 *
 	 * a maplock for txUpdateMap() for free of the page
 	 * has been formatted at txLock() time saving the src
@@ -2155,10 +2159,10 @@ static void mapLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 }
 
 /*
- *      txEA()
+ *	txEA()
  *
- * function:    acquire maplock for EA/ACL extents or
- *              set COMMIT_INLINE flag;
+ * function:	acquire maplock for EA/ACL extents or
+ *		set COMMIT_INLINE flag;
  */
 void txEA(tid_t tid, struct inode *ip, dxd_t * oldea, dxd_t * newea)
 {
@@ -2207,10 +2211,10 @@ void txEA(tid_t tid, struct inode *ip, dxd_t * oldea, dxd_t * newea)
 }
 
 /*
- *      txForce()
+ *	txForce()
  *
  * function: synchronously write pages locked by transaction
- *              after txLog() but before txUpdateMap();
+ *	     after txLog() but before txUpdateMap();
  */
 static void txForce(struct tblock * tblk)
 {
@@ -2273,10 +2277,10 @@ static void txForce(struct tblock * tblk)
 }
 
 /*
- *      txUpdateMap()
+ *	txUpdateMap()
  *
- * function:    update persistent allocation map (and working map
- *              if appropriate);
+ * function:	update persistent allocation map (and working map
+ *		if appropriate);
  *
  * parameter:
  */
@@ -2298,7 +2302,7 @@ static void txUpdateMap(struct tblock * tblk)
 
 
 	/*
-	 *      update block allocation map
+	 *	update block allocation map
 	 *
 	 * update allocation state in pmap (and wmap) and
 	 * update lsn of the pmap page;
@@ -2382,7 +2386,7 @@ static void txUpdateMap(struct tblock * tblk)
 		}
 	}
 	/*
-	 *      update inode allocation map
+	 *	update inode allocation map
 	 *
 	 * update allocation state in pmap and
 	 * update lsn of the pmap page;
@@ -2407,24 +2411,24 @@ static void txUpdateMap(struct tblock * tblk)
 }
 
 /*
- *      txAllocPMap()
+ *	txAllocPMap()
  *
  * function: allocate from persistent map;
  *
  * parameter:
- *      ipbmap  -
- *      malock -
- *              xad list:
- *              pxd:
- *
- *      maptype -
- *              allocate from persistent map;
- *              free from persistent map;
- *              (e.g., tmp file - free from working map at releae
- *               of last reference);
- *              free from persistent and working map;
- *
- *      lsn     - log sequence number;
+ *	ipbmap	-
+ *	malock	-
+ *		xad list:
+ *		pxd:
+ *
+ *	maptype -
+ *		allocate from persistent map;
+ *		free from persistent map;
+ *		(e.g., tmp file - free from working map at releae
+ *		 of last reference);
+ *		free from persistent and working map;
+ *
+ *	lsn	- log sequence number;
  */
 static void txAllocPMap(struct inode *ip, struct maplock * maplock,
 			struct tblock * tblk)
@@ -2478,9 +2482,9 @@ static void txAllocPMap(struct inode *ip, struct maplock * maplock,
 }
 
 /*
- *      txFreeMap()
+ *	txFreeMap()
  *
- * function:    free from persistent and/or working map;
+ * function:	free from persistent and/or working map;
  *
  * todo: optimization
  */
@@ -2579,9 +2583,9 @@ void txFreeMap(struct inode *ip,
 }
 
 /*
- *      txFreelock()
+ *	txFreelock()
  *
- * function:    remove tlock from inode anonymous locklist
+ * function:	remove tlock from inode anonymous locklist
  */
 void txFreelock(struct inode *ip)
 {
@@ -2619,7 +2623,7 @@ void txFreelock(struct inode *ip)
 }
 
 /*
- *      txAbort()
+ *	txAbort()
  *
  * function: abort tx before commit;
  *
@@ -2679,7 +2683,7 @@ void txAbort(tid_t tid, int dirty)
 }
 
 /*
- *      txLazyCommit(void)
+ *	txLazyCommit(void)
  *
  *	All transactions except those changing ipimap (COMMIT_FORCE) are
  *	processed by this routine.  This insures that the inode and block
@@ -2728,7 +2732,7 @@ static void txLazyCommit(struct tblock * tblk)
 }
 
 /*
- *      jfs_lazycommit(void)
+ *	jfs_lazycommit(void)
  *
  *	To be run as a kernel daemon.  If lbmIODone is called in an interrupt
  *	context, or where blocking is not wanted, this routine will process
@@ -2913,7 +2917,7 @@ void txResume(struct super_block *sb)
 }
 
 /*
- *      jfs_sync(void)
+ *	jfs_sync(void)
  *
  *	To be run as a kernel daemon.  This is awakened when tlocks run low.
  *	We write any inodes that have anonymous tlocks so they will become
diff --git a/fs/jfs/jfs_txnmgr.h b/fs/jfs/jfs_txnmgr.h
index 7863cf2..ab72889 100644
--- a/fs/jfs/jfs_txnmgr.h
+++ b/fs/jfs/jfs_txnmgr.h
@@ -94,7 +94,7 @@ extern struct tblock *TxBlock;	/* transaction block table */
  */
 struct tlock {
 	lid_t next;		/* 2: index next lockword on tid locklist
-				 *          next lockword on freelist
+				 *	    next lockword on freelist
 				 */
 	tid_t tid;		/* 2: transaction id holding lock */
 
diff --git a/fs/jfs/jfs_types.h b/fs/jfs/jfs_types.h
index 09b2529..649f981 100644
--- a/fs/jfs/jfs_types.h
+++ b/fs/jfs/jfs_types.h
@@ -21,7 +21,7 @@
 /*
  *	jfs_types.h:
  *
- * basic type/utility  definitions
+ * basic type/utility definitions
  *
  * note: this header file must be the 1st include file
  * of JFS include list in all JFS .c file.
@@ -54,8 +54,8 @@ struct timestruc_t {
  */
 
 #define LEFTMOSTONE	0x80000000
-#define	HIGHORDER	0x80000000u	/* high order bit on            */
-#define	ONES		0xffffffffu	/* all bit on                   */
+#define	HIGHORDER	0x80000000u	/* high order bit on	*/
+#define	ONES		0xffffffffu	/* all bit on		*/
 
 /*
  *	logical xd (lxd)
@@ -148,7 +148,7 @@ typedef struct {
 #define sizeDXD(dxd)	le32_to_cpu((dxd)->size)
 
 /*
- *      directory entry argument
+ *	directory entry argument
  */
 struct component_name {
 	int namlen;
@@ -160,14 +160,14 @@ struct component_name {
  *	DASD limit information - stored in directory inode
  */
 struct dasd {
-	u8 thresh;		/* Alert Threshold (in percent) */
-	u8 delta;		/* Alert Threshold delta (in percent)   */
+	u8 thresh;		/* Alert Threshold (in percent)		*/
+	u8 delta;		/* Alert Threshold delta (in percent)	*/
 	u8 rsrvd1;
-	u8 limit_hi;		/* DASD limit (in logical blocks)       */
-	__le32 limit_lo;	/* DASD limit (in logical blocks)       */
+	u8 limit_hi;		/* DASD limit (in logical blocks)	*/
+	__le32 limit_lo;	/* DASD limit (in logical blocks)	*/
 	u8 rsrvd2[3];
-	u8 used_hi;		/* DASD usage (in logical blocks)       */
-	__le32 used_lo;		/* DASD usage (in logical blocks)       */
+	u8 used_hi;		/* DASD usage (in logical blocks)	*/
+	__le32 used_lo;		/* DASD usage (in logical blocks)	*/
 };
 
 #define DASDLIMIT(dasdp) \
diff --git a/fs/jfs/jfs_umount.c b/fs/jfs/jfs_umount.c
index a386f48..7971f37 100644
--- a/fs/jfs/jfs_umount.c
+++ b/fs/jfs/jfs_umount.c
@@ -60,7 +60,7 @@ int jfs_umount(struct super_block *sb)
 	jfs_info("UnMount JFS: sb:0x%p", sb);
 
 	/*
-	 *      update superblock and close log
+	 *	update superblock and close log
 	 *
 	 * if mounted read-write and log based recovery was enabled
 	 */
diff --git a/fs/jfs/jfs_xtree.c b/fs/jfs/jfs_xtree.c
index acc97c4..1543906 100644
--- a/fs/jfs/jfs_xtree.c
+++ b/fs/jfs/jfs_xtree.c
@@ -16,7 +16,7 @@
  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 /*
- *      jfs_xtree.c: extent allocation descriptor B+-tree manager
+ *	jfs_xtree.c: extent allocation descriptor B+-tree manager
  */
 
 #include <linux/fs.h>
@@ -32,30 +32,30 @@
 /*
  * xtree local flag
  */
-#define XT_INSERT       0x00000001
+#define XT_INSERT	0x00000001
 
 /*
- *       xtree key/entry comparison: extent offset
+ *	xtree key/entry comparison: extent offset
  *
  * return:
- *      -1: k < start of extent
- *       0: start_of_extent <= k <= end_of_extent
- *       1: k > end_of_extent
+ *	-1: k < start of extent
+ *	 0: start_of_extent <= k <= end_of_extent
+ *	 1: k > end_of_extent
  */
 #define XT_CMP(CMP, K, X, OFFSET64)\
 {\
-        OFFSET64 = offsetXAD(X);\
-        (CMP) = ((K) >= OFFSET64 + lengthXAD(X)) ? 1 :\
-              ((K) < OFFSET64) ? -1 : 0;\
+	OFFSET64 = offsetXAD(X);\
+	(CMP) = ((K) >= OFFSET64 + lengthXAD(X)) ? 1 :\
+		((K) < OFFSET64) ? -1 : 0;\
 }
 
 /* write a xad entry */
 #define XT_PUTENTRY(XAD, FLAG, OFF, LEN, ADDR)\
 {\
-        (XAD)->flag = (FLAG);\
-        XADoffset((XAD), (OFF));\
-        XADlength((XAD), (LEN));\
-        XADaddress((XAD), (ADDR));\
+	(XAD)->flag = (FLAG);\
+	XADoffset((XAD), (OFF));\
+	XADlength((XAD), (LEN));\
+	XADaddress((XAD), (ADDR));\
 }
 
 #define XT_PAGE(IP, MP) BT_PAGE(IP, MP, xtpage_t, i_xtroot)
@@ -76,13 +76,13 @@
 			MP = NULL;\
 			RC = -EIO;\
 		}\
-        }\
+	}\
 }
 
 /* for consistency */
 #define XT_PUTPAGE(MP) BT_PUTPAGE(MP)
 
-#define XT_GETSEARCH(IP, LEAF, BN, MP,  P, INDEX) \
+#define XT_GETSEARCH(IP, LEAF, BN, MP, P, INDEX) \
 	BT_GETSEARCH(IP, LEAF, BN, MP, xtpage_t, P, INDEX, i_xtroot)
 /* xtree entry parameter descriptor */
 struct xtsplit {
@@ -97,7 +97,7 @@ struct xtsplit {
 
 
 /*
- *      statistics
+ *	statistics
  */
 #ifdef CONFIG_JFS_STATISTICS
 static struct {
@@ -136,7 +136,7 @@ static int xtRelink(tid_t tid, struct inode *ip, xtpage_t * fp);
 #endif				/*  _STILL_TO_PORT */
 
 /*
- *      xtLookup()
+ *	xtLookup()
  *
  * function: map a single page into a physical extent;
  */
@@ -179,7 +179,7 @@ int xtLookup(struct inode *ip, s64 lstart,
 	}
 
 	/*
-	 *      compute the physical extent covering logical extent
+	 *	compute the physical extent covering logical extent
 	 *
 	 * N.B. search may have failed (e.g., hole in sparse file),
 	 * and returned the index of the next entry.
@@ -220,27 +220,27 @@ int xtLookup(struct inode *ip, s64 lstart,
 
 
 /*
- *      xtLookupList()
+ *	xtLookupList()
  *
  * function: map a single logical extent into a list of physical extent;
  *
  * parameter:
- *      struct inode    *ip,
- *      struct lxdlist  *lxdlist,       lxd list (in)
- *      struct xadlist  *xadlist,       xad list (in/out)
- *      int		flag)
+ *	struct inode	*ip,
+ *	struct lxdlist	*lxdlist,	lxd list (in)
+ *	struct xadlist	*xadlist,	xad list (in/out)
+ *	int		flag)
  *
  * coverage of lxd by xad under assumption of
  * . lxd's are ordered and disjoint.
  * . xad's are ordered and disjoint.
  *
  * return:
- *      0:      success
+ *	0:	success
  *
  * note: a page being written (even a single byte) is backed fully,
- *      except the last page which is only backed with blocks
- *      required to cover the last byte;
- *      the extent backing a page is fully contained within an xad;
+ *	except the last page which is only backed with blocks
+ *	required to cover the last byte;
+ *	the extent backing a page is fully contained within an xad;
  */
 int xtLookupList(struct inode *ip, struct lxdlist * lxdlist,
 		 struct xadlist * xadlist, int flag)
@@ -284,7 +284,7 @@ int xtLookupList(struct inode *ip, struct lxdlist * lxdlist,
 		return rc;
 
 	/*
-	 *      compute the physical extent covering logical extent
+	 *	compute the physical extent covering logical extent
 	 *
 	 * N.B. search may have failed (e.g., hole in sparse file),
 	 * and returned the index of the next entry.
@@ -343,7 +343,7 @@ int xtLookupList(struct inode *ip, struct lxdlist * lxdlist,
 		if (lstart >= size)
 			goto mapend;
 
-		/* compare with the current xad  */
+		/* compare with the current xad */
 		goto compare1;
 	}
 	/* lxd is covered by xad */
@@ -430,7 +430,7 @@ int xtLookupList(struct inode *ip, struct lxdlist * lxdlist,
 	/*
 	 * lxd is partially covered by xad
 	 */
-	else {			/* (xend < lend)  */
+	else {			/* (xend < lend) */
 
 		/*
 		 * get next xad
@@ -477,22 +477,22 @@ int xtLookupList(struct inode *ip, struct lxdlist * lxdlist,
 
 
 /*
- *      xtSearch()
+ *	xtSearch()
  *
- * function:    search for the xad entry covering specified offset.
+ * function:	search for the xad entry covering specified offset.
  *
  * parameters:
- *      ip      - file object;
- *      xoff    - extent offset;
- *      nextp	- address of next extent (if any) for search miss
- *      cmpp    - comparison result:
- *      btstack - traverse stack;
- *      flag    - search process flag (XT_INSERT);
+ *	ip	- file object;
+ *	xoff	- extent offset;
+ *	nextp	- address of next extent (if any) for search miss
+ *	cmpp	- comparison result:
+ *	btstack - traverse stack;
+ *	flag	- search process flag (XT_INSERT);
  *
  * returns:
- *      btstack contains (bn, index) of search path traversed to the entry.
- *      *cmpp is set to result of comparison with the entry returned.
- *      the page containing the entry is pinned at exit.
+ *	btstack contains (bn, index) of search path traversed to the entry.
+ *	*cmpp is set to result of comparison with the entry returned.
+ *	the page containing the entry is pinned at exit.
  */
 static int xtSearch(struct inode *ip, s64 xoff,	s64 *nextp,
 		    int *cmpp, struct btstack * btstack, int flag)
@@ -517,7 +517,7 @@ static int xtSearch(struct inode *ip, s64 xoff,	s64 *nextp,
 	btstack->nsplit = 0;
 
 	/*
-	 *      search down tree from root:
+	 *	search down tree from root:
 	 *
 	 * between two consecutive entries of <Ki, Pi> and <Kj, Pj> of
 	 * internal page, child page Pi contains entry with k, Ki <= K < Kj.
@@ -642,7 +642,7 @@ static int xtSearch(struct inode *ip, s64 xoff,	s64 *nextp,
 			XT_CMP(cmp, xoff, &p->xad[index], t64);
 			if (cmp == 0) {
 				/*
-				 *      search hit
+				 *	search hit
 				 */
 				/* search hit - leaf page:
 				 * return the entry found
@@ -692,7 +692,7 @@ static int xtSearch(struct inode *ip, s64 xoff,	s64 *nextp,
 		}
 
 		/*
-		 *      search miss
+		 *	search miss
 		 *
 		 * base is the smallest index with key (Kj) greater than
 		 * search key (K) and may be zero or maxentry index.
@@ -773,22 +773,22 @@ static int xtSearch(struct inode *ip, s64 xoff,	s64 *nextp,
 }
 
 /*
- *      xtInsert()
+ *	xtInsert()
  *
  * function:
  *
  * parameter:
- *      tid     - transaction id;
- *      ip      - file object;
- *      xflag   - extent flag (XAD_NOTRECORDED):
- *      xoff    - extent offset;
- *      xlen    - extent length;
- *      xaddrp  - extent address pointer (in/out):
- *              if (*xaddrp)
- *                      caller allocated data extent at *xaddrp;
- *              else
- *                      allocate data extent and return its xaddr;
- *      flag    -
+ *	tid	- transaction id;
+ *	ip	- file object;
+ *	xflag	- extent flag (XAD_NOTRECORDED):
+ *	xoff	- extent offset;
+ *	xlen	- extent length;
+ *	xaddrp	- extent address pointer (in/out):
+ *		if (*xaddrp)
+ *			caller allocated data extent at *xaddrp;
+ *		else
+ *			allocate data extent and return its xaddr;
+ *	flag	-
  *
  * return:
  */
@@ -813,7 +813,7 @@ int xtInsert(tid_t tid,		/* transaction id */
 	jfs_info("xtInsert: nxoff:0x%lx nxlen:0x%x", (ulong) xoff, xlen);
 
 	/*
-	 *      search for the entry location at which to insert:
+	 *	search for the entry location at which to insert:
 	 *
 	 * xtFastSearch() and xtSearch() both returns (leaf page
 	 * pinned, index at which to insert).
@@ -853,13 +853,13 @@ int xtInsert(tid_t tid,		/* transaction id */
 	}
 
 	/*
-	 *      insert entry for new extent
+	 *	insert entry for new extent
 	 */
 	xflag |= XAD_NEW;
 
 	/*
-	 *      if the leaf page is full, split the page and
-	 *      propagate up the router entry for the new page from split
+	 *	if the leaf page is full, split the page and
+	 *	propagate up the router entry for the new page from split
 	 *
 	 * The xtSplitUp() will insert the entry and unpin the leaf page.
 	 */
@@ -886,7 +886,7 @@ int xtInsert(tid_t tid,		/* transaction id */
 	}
 
 	/*
-	 *      insert the new entry into the leaf page
+	 *	insert the new entry into the leaf page
 	 */
 	/*
 	 * acquire a transaction lock on the leaf page;
@@ -930,16 +930,16 @@ int xtInsert(tid_t tid,		/* transaction id */
 
 
 /*
- *      xtSplitUp()
+ *	xtSplitUp()
  *
  * function:
- *      split full pages as propagating insertion up the tree
+ *	split full pages as propagating insertion up the tree
  *
  * parameter:
- *      tid     - transaction id;
- *      ip      - file object;
- *      split   - entry parameter descriptor;
- *      btstack - traverse stack from xtSearch()
+ *	tid	- transaction id;
+ *	ip	- file object;
+ *	split	- entry parameter descriptor;
+ *	btstack - traverse stack from xtSearch()
  *
  * return:
  */
@@ -1199,22 +1199,22 @@ xtSplitUp(tid_t tid,
 
 
 /*
- *      xtSplitPage()
+ *	xtSplitPage()
  *
  * function:
- *      split a full non-root page into
- *      original/split/left page and new right page
- *      i.e., the original/split page remains as left page.
+ *	split a full non-root page into
+ *	original/split/left page and new right page
+ *	i.e., the original/split page remains as left page.
  *
  * parameter:
- *      int		tid,
- *      struct inode    *ip,
- *      struct xtsplit  *split,
- *      struct metapage	**rmpp,
- *      u64		*rbnp,
+ *	int		tid,
+ *	struct inode	*ip,
+ *	struct xtsplit	*split,
+ *	struct metapage	**rmpp,
+ *	u64		*rbnp,
  *
  * return:
- *      Pointer to page in which to insert or NULL on error.
+ *	Pointer to page in which to insert or NULL on error.
  */
 static int
 xtSplitPage(tid_t tid, struct inode *ip,
@@ -1248,9 +1248,9 @@ xtSplitPage(tid_t tid, struct inode *ip,
 	rbn = addressPXD(pxd);
 
 	/* Allocate blocks to quota. */
-       if (DQUOT_ALLOC_BLOCK(ip, lengthPXD(pxd))) {
-	       rc = -EDQUOT;
-	       goto clean_up;
+	if (DQUOT_ALLOC_BLOCK(ip, lengthPXD(pxd))) {
+		rc = -EDQUOT;
+		goto clean_up;
 	}
 
 	quota_allocation += lengthPXD(pxd);
@@ -1304,7 +1304,7 @@ xtSplitPage(tid_t tid, struct inode *ip,
 	skip = split->index;
 
 	/*
-	 *      sequential append at tail (after last entry of last page)
+	 *	sequential append at tail (after last entry of last page)
 	 *
 	 * if splitting the last page on a level because of appending
 	 * a entry to it (skip is maxentry), it's likely that the access is
@@ -1342,7 +1342,7 @@ xtSplitPage(tid_t tid, struct inode *ip,
 	}
 
 	/*
-	 *      non-sequential insert (at possibly middle page)
+	 *	non-sequential insert (at possibly middle page)
 	 */
 
 	/*
@@ -1465,25 +1465,24 @@ xtSplitPage(tid_t tid, struct inode *ip,
 
 
 /*
- *      xtSplitRoot()
+ *	xtSplitRoot()
  *
  * function:
- *      split the full root page into
- *      original/root/split page and new right page
- *      i.e., root remains fixed in tree anchor (inode) and
- *      the root is copied to a single new right child page
- *      since root page << non-root page, and
- *      the split root page contains a single entry for the
- *      new right child page.
+ *	split the full root page into original/root/split page and new
+ *	right page
+ *	i.e., root remains fixed in tree anchor (inode) and the root is
+ *	copied to a single new right child page since root page <<
+ *	non-root page, and the split root page contains a single entry
+ *	for the new right child page.
  *
  * parameter:
- *      int		tid,
- *      struct inode    *ip,
- *      struct xtsplit  *split,
- *      struct metapage	**rmpp)
+ *	int		tid,
+ *	struct inode	*ip,
+ *	struct xtsplit	*split,
+ *	struct metapage	**rmpp)
  *
  * return:
- *      Pointer to page in which to insert or NULL on error.
+ *	Pointer to page in which to insert or NULL on error.
  */
 static int
 xtSplitRoot(tid_t tid,
@@ -1505,7 +1504,7 @@ xtSplitRoot(tid_t tid,
 	INCREMENT(xtStat.split);
 
 	/*
-	 *      allocate a single (right) child page
+	 *	allocate a single (right) child page
 	 */
 	pxdlist = split->pxdlist;
 	pxd = &pxdlist->pxd[pxdlist->npxd];
@@ -1573,7 +1572,7 @@ xtSplitRoot(tid_t tid,
 	}
 
 	/*
-	 *      reset the root
+	 *	reset the root
 	 *
 	 * init root with the single entry for the new right page
 	 * set the 1st entry offset to 0, which force the left-most key
@@ -1610,7 +1609,7 @@ xtSplitRoot(tid_t tid,
 
 
 /*
- *      xtExtend()
+ *	xtExtend()
  *
  * function: extend in-place;
  *
@@ -1677,7 +1676,7 @@ int xtExtend(tid_t tid,		/* transaction id */
 		goto extendOld;
 
 	/*
-	 *      extent overflow: insert entry for new extent
+	 *	extent overflow: insert entry for new extent
 	 */
 //insertNew:
 	xoff = offsetXAD(xad) + MAXXLEN;
@@ -1685,8 +1684,8 @@ int xtExtend(tid_t tid,		/* transaction id */
 	nextindex = le16_to_cpu(p->header.nextindex);
 
 	/*
-	 *      if the leaf page is full, insert the new entry and
-	 *      propagate up the router entry for the new page from split
+	 *	if the leaf page is full, insert the new entry and
+	 *	propagate up the router entry for the new page from split
 	 *
 	 * The xtSplitUp() will insert the entry and unpin the leaf page.
 	 */
@@ -1731,7 +1730,7 @@ int xtExtend(tid_t tid,		/* transaction id */
 		}
 	}
 	/*
-	 *      insert the new entry into the leaf page
+	 *	insert the new entry into the leaf page
 	 */
 	else {
 		/* insert the new entry: mark the entry NEW */
@@ -1771,11 +1770,11 @@ int xtExtend(tid_t tid,		/* transaction id */
 
 #ifdef _NOTYET
 /*
- *      xtTailgate()
+ *	xtTailgate()
  *
  * function: split existing 'tail' extent
- *      (split offset >= start offset of tail extent), and
- *      relocate and extend the split tail half;
+ *	(split offset >= start offset of tail extent), and
+ *	relocate and extend the split tail half;
  *
  * note: existing extent may or may not have been committed.
  * caller is responsible for pager buffer cache update, and
@@ -1804,7 +1803,7 @@ int xtTailgate(tid_t tid,		/* transaction id */
 
 /*
 printf("xtTailgate: nxoff:0x%lx nxlen:0x%x nxaddr:0x%lx\n",
-        (ulong)xoff, xlen, (ulong)xaddr);
+	(ulong)xoff, xlen, (ulong)xaddr);
 */
 
 	/* there must exist extent to be tailgated */
@@ -1842,18 +1841,18 @@ printf("xtTailgate: nxoff:0x%lx nxlen:0x%x nxaddr:0x%lx\n",
 	xad = &p->xad[index];
 /*
 printf("xtTailgate: xoff:0x%lx xlen:0x%x xaddr:0x%lx\n",
-        (ulong)offsetXAD(xad), lengthXAD(xad), (ulong)addressXAD(xad));
+	(ulong)offsetXAD(xad), lengthXAD(xad), (ulong)addressXAD(xad));
 */
 	if ((llen = xoff - offsetXAD(xad)) == 0)
 		goto updateOld;
 
 	/*
-	 *      partially replace extent: insert entry for new extent
+	 *	partially replace extent: insert entry for new extent
 	 */
 //insertNew:
 	/*
-	 *      if the leaf page is full, insert the new entry and
-	 *      propagate up the router entry for the new page from split
+	 *	if the leaf page is full, insert the new entry and
+	 *	propagate up the router entry for the new page from split
 	 *
 	 * The xtSplitUp() will insert the entry and unpin the leaf page.
 	 */
@@ -1898,7 +1897,7 @@ printf("xtTailgate: xoff:0x%lx xlen:0x%x xaddr:0x%lx\n",
 		}
 	}
 	/*
-	 *      insert the new entry into the leaf page
+	 *	insert the new entry into the leaf page
 	 */
 	else {
 		/* insert the new entry: mark the entry NEW */
@@ -1955,17 +1954,17 @@ printf("xtTailgate: xoff:0x%lx xlen:0x%x xaddr:0x%lx\n",
 #endif /* _NOTYET */
 
 /*
- *      xtUpdate()
+ *	xtUpdate()
  *
  * function: update XAD;
  *
- *      update extent for allocated_but_not_recorded or
- *      compressed extent;
+ *	update extent for allocated_but_not_recorded or
+ *	compressed extent;
  *
  * parameter:
- *      nxad    - new XAD;
- *                logical extent of the specified XAD must be completely
- *                contained by an existing XAD;
+ *	nxad	- new XAD;
+ *		logical extent of the specified XAD must be completely
+ *		contained by an existing XAD;
  */
 int xtUpdate(tid_t tid, struct inode *ip, xad_t * nxad)
 {				/* new XAD */
@@ -2416,19 +2415,19 @@ printf("xtUpdate.updateLeft.split p:0x%p\n", p);
 
 
 /*
- *      xtAppend()
+ *	xtAppend()
  *
  * function: grow in append mode from contiguous region specified ;
  *
  * parameter:
- *      tid             - transaction id;
- *      ip              - file object;
- *      xflag           - extent flag:
- *      xoff            - extent offset;
- *      maxblocks       - max extent length;
- *      xlen            - extent length (in/out);
- *      xaddrp          - extent address pointer (in/out):
- *      flag            -
+ *	tid		- transaction id;
+ *	ip		- file object;
+ *	xflag		- extent flag:
+ *	xoff		- extent offset;
+ *	maxblocks	- max extent length;
+ *	xlen		- extent length (in/out);
+ *	xaddrp		- extent address pointer (in/out):
+ *	flag		-
  *
  * return:
  */
@@ -2460,7 +2459,7 @@ int xtAppend(tid_t tid,		/* transaction id */
 		 (ulong) xoff, maxblocks, xlen, (ulong) xaddr);
 
 	/*
-	 *      search for the entry location at which to insert:
+	 *	search for the entry location at which to insert:
 	 *
 	 * xtFastSearch() and xtSearch() both returns (leaf page
 	 * pinned, index at which to insert).
@@ -2482,13 +2481,13 @@ int xtAppend(tid_t tid,		/* transaction id */
 		xlen = min(xlen, (int)(next - xoff));
 //insert:
 	/*
-	 *      insert entry for new extent
+	 *	insert entry for new extent
 	 */
 	xflag |= XAD_NEW;
 
 	/*
-	 *      if the leaf page is full, split the page and
-	 *      propagate up the router entry for the new page from split
+	 *	if the leaf page is full, split the page and
+	 *	propagate up the router entry for the new page from split
 	 *
 	 * The xtSplitUp() will insert the entry and unpin the leaf page.
 	 */
@@ -2545,7 +2544,7 @@ int xtAppend(tid_t tid,		/* transaction id */
 	return 0;
 
 	/*
-	 *      insert the new entry into the leaf page
+	 *	insert the new entry into the leaf page
 	 */
       insertLeaf:
 	/*
@@ -2589,17 +2588,17 @@ int xtAppend(tid_t tid,		/* transaction id */
 
 /* - TBD for defragmentaion/reorganization -
  *
- *      xtDelete()
+ *	xtDelete()
  *
  * function:
- *      delete the entry with the specified key.
+ *	delete the entry with the specified key.
  *
- *      N.B.: whole extent of the entry is assumed to be deleted.
+ *	N.B.: whole extent of the entry is assumed to be deleted.
  *
  * parameter:
  *
  * return:
- *       ENOENT: if the entry is not found.
+ *	ENOENT: if the entry is not found.
  *
  * exception:
  */
@@ -2665,10 +2664,10 @@ int xtDelete(tid_t tid, struct inode *ip, s64 xoff, s32 xlen, int flag)
 
 /* - TBD for defragmentaion/reorganization -
  *
- *      xtDeleteUp()
+ *	xtDeleteUp()
  *
  * function:
- *      free empty pages as propagating deletion up the tree
+ *	free empty pages as propagating deletion up the tree
  *
  * parameter:
  *
@@ -2815,15 +2814,15 @@ xtDeleteUp(tid_t tid, struct inode *ip,
 
 
 /*
- * NAME:        xtRelocate()
+ * NAME:	xtRelocate()
  *
- * FUNCTION:    relocate xtpage or data extent of regular file;
- *              This function is mainly used by defragfs utility.
+ * FUNCTION:	relocate xtpage or data extent of regular file;
+ *		This function is mainly used by defragfs utility.
  *
- * NOTE:        This routine does not have the logic to handle
- *              uncommitted allocated extent. The caller should call
- *              txCommit() to commit all the allocation before call
- *              this routine.
+ * NOTE:	This routine does not have the logic to handle
+ *		uncommitted allocated extent. The caller should call
+ *		txCommit() to commit all the allocation before call
+ *		this routine.
  */
 int
 xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad,	/* old XAD */
@@ -2865,8 +2864,8 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad,	/* old XAD */
 		 xtype, (ulong) xoff, xlen, (ulong) oxaddr, (ulong) nxaddr);
 
 	/*
-	 *      1. get and validate the parent xtpage/xad entry
-	 *      covering the source extent to be relocated;
+	 *	1. get and validate the parent xtpage/xad entry
+	 *	covering the source extent to be relocated;
 	 */
 	if (xtype == DATAEXT) {
 		/* search in leaf entry */
@@ -2910,7 +2909,7 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad,	/* old XAD */
 	jfs_info("xtRelocate: parent xad entry validated.");
 
 	/*
-	 *      2. relocate the extent
+	 *	2. relocate the extent
 	 */
 	if (xtype == DATAEXT) {
 		/* if the extent is allocated-but-not-recorded
@@ -2923,7 +2922,7 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad,	/* old XAD */
 			XT_PUTPAGE(pmp);
 
 		/*
-		 *      cmRelocate()
+		 *	cmRelocate()
 		 *
 		 * copy target data pages to be relocated;
 		 *
@@ -2945,8 +2944,8 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad,	/* old XAD */
 		pno = offset >> CM_L2BSIZE;
 		npages = (nbytes + (CM_BSIZE - 1)) >> CM_L2BSIZE;
 /*
-                npages = ((offset + nbytes - 1) >> CM_L2BSIZE) -
-                         (offset >> CM_L2BSIZE) + 1;
+		npages = ((offset + nbytes - 1) >> CM_L2BSIZE) -
+			  (offset >> CM_L2BSIZE) + 1;
 */
 		sxaddr = oxaddr;
 		dxaddr = nxaddr;
@@ -2981,7 +2980,7 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad,	/* old XAD */
 
 		XT_GETSEARCH(ip, btstack.top, bn, pmp, pp, index);
 		jfs_info("xtRelocate: target data extent relocated.");
-	} else {		/* (xtype  == XTPAGE) */
+	} else {		/* (xtype == XTPAGE) */
 
 		/*
 		 * read in the target xtpage from the source extent;
@@ -3026,16 +3025,14 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad,	/* old XAD */
 		 */
 		if (lmp) {
 			BT_MARK_DIRTY(lmp, ip);
-			tlck =
-			    txLock(tid, ip, lmp, tlckXTREE | tlckRELINK);
+			tlck = txLock(tid, ip, lmp, tlckXTREE | tlckRELINK);
 			lp->header.next = cpu_to_le64(nxaddr);
 			XT_PUTPAGE(lmp);
 		}
 
 		if (rmp) {
 			BT_MARK_DIRTY(rmp, ip);
-			tlck =
-			    txLock(tid, ip, rmp, tlckXTREE | tlckRELINK);
+			tlck = txLock(tid, ip, rmp, tlckXTREE | tlckRELINK);
 			rp->header.prev = cpu_to_le64(nxaddr);
 			XT_PUTPAGE(rmp);
 		}
@@ -3062,7 +3059,7 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad,	/* old XAD */
 		 * scan may be skipped by commit() and logredo();
 		 */
 		BT_MARK_DIRTY(mp, ip);
-		/* tlckNEW init  xtlck->lwm.offset = XTENTRYSTART; */
+		/* tlckNEW init xtlck->lwm.offset = XTENTRYSTART; */
 		tlck = txLock(tid, ip, mp, tlckXTREE | tlckNEW);
 		xtlck = (struct xtlock *) & tlck->lock;
 
@@ -3084,7 +3081,7 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad,	/* old XAD */
 	}
 
 	/*
-	 *      3. acquire maplock for the source extent to be freed;
+	 *	3. acquire maplock for the source extent to be freed;
 	 *
 	 * acquire a maplock saving the src relocated extent address;
 	 * to free of the extent at commit time;
@@ -3105,7 +3102,7 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad,	/* old XAD */
 	 *      is no buffer associated with this lock since the buffer
 	 *      has been redirected to the target location.
 	 */
-	else			/* (xtype  == XTPAGE) */
+	else			/* (xtype == XTPAGE) */
 		tlck = txMaplock(tid, ip, tlckMAP | tlckRELOCATE);
 
 	pxdlock = (struct pxd_lock *) & tlck->lock;
@@ -3115,7 +3112,7 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad,	/* old XAD */
 	pxdlock->index = 1;
 
 	/*
-	 *      4. update the parent xad entry for relocation;
+	 *	4. update the parent xad entry for relocation;
 	 *
 	 * acquire tlck for the parent entry with XAD_NEW as entry
 	 * update which will write LOG_REDOPAGE and update bmap for
@@ -3143,22 +3140,22 @@ xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad,	/* old XAD */
 
 
 /*
- *      xtSearchNode()
+ *	xtSearchNode()
  *
- * function:    search for the internal xad entry covering specified extent.
- *              This function is mainly used by defragfs utility.
+ * function:	search for the internal xad entry covering specified extent.
+ *		This function is mainly used by defragfs utility.
  *
  * parameters:
- *      ip      - file object;
- *      xad     - extent to find;
- *      cmpp    - comparison result:
- *      btstack - traverse stack;
- *      flag    - search process flag;
+ *	ip	- file object;
+ *	xad	- extent to find;
+ *	cmpp	- comparison result:
+ *	btstack - traverse stack;
+ *	flag	- search process flag;
  *
  * returns:
- *      btstack contains (bn, index) of search path traversed to the entry.
- *      *cmpp is set to result of comparison with the entry returned.
- *      the page containing the entry is pinned at exit.
+ *	btstack contains (bn, index) of search path traversed to the entry.
+ *	*cmpp is set to result of comparison with the entry returned.
+ *	the page containing the entry is pinned at exit.
  */
 static int xtSearchNode(struct inode *ip, xad_t * xad,	/* required XAD entry */
 			int *cmpp, struct btstack * btstack, int flag)
@@ -3181,7 +3178,7 @@ static int xtSearchNode(struct inode *ip, xad_t * xad,	/* required XAD entry */
 	xaddr = addressXAD(xad);
 
 	/*
-	 *      search down tree from root:
+	 *	search down tree from root:
 	 *
 	 * between two consecutive entries of <Ki, Pi> and <Kj, Pj> of
 	 * internal page, child page Pi contains entry with k, Ki <= K < Kj.
@@ -3217,7 +3214,7 @@ static int xtSearchNode(struct inode *ip, xad_t * xad,	/* required XAD entry */
 			XT_CMP(cmp, xoff, &p->xad[index], t64);
 			if (cmp == 0) {
 				/*
-				 *      search hit
+				 *	search hit
 				 *
 				 * verify for exact match;
 				 */
@@ -3245,7 +3242,7 @@ static int xtSearchNode(struct inode *ip, xad_t * xad,	/* required XAD entry */
 		}
 
 		/*
-		 *      search miss - non-leaf page:
+		 *	search miss - non-leaf page:
 		 *
 		 * base is the smallest index with key (Kj) greater than
 		 * search key (K) and may be zero or maxentry index.
@@ -3268,15 +3265,15 @@ static int xtSearchNode(struct inode *ip, xad_t * xad,	/* required XAD entry */
 
 
 /*
- *      xtRelink()
+ *	xtRelink()
  *
  * function:
- *      link around a freed page.
+ *	link around a freed page.
  *
  * Parameter:
- *      int           tid,
- *      struct inode    *ip,
- *      xtpage_t        *p)
+ *	int		tid,
+ *	struct inode	*ip,
+ *	xtpage_t	*p)
  *
  * returns:
  */
@@ -3338,7 +3335,7 @@ static int xtRelink(tid_t tid, struct inode *ip, xtpage_t * p)
 
 
 /*
- *      xtInitRoot()
+ *	xtInitRoot()
  *
  * initialize file root (inline in inode)
  */
@@ -3385,42 +3382,42 @@ void xtInitRoot(tid_t tid, struct inode *ip)
 #define MAX_TRUNCATE_LEAVES 50
 
 /*
- *      xtTruncate()
+ *	xtTruncate()
  *
  * function:
- *      traverse for truncation logging backward bottom up;
- *      terminate at the last extent entry at the current subtree
- *      root page covering new down size.
- *      truncation may occur within the last extent entry.
+ *	traverse for truncation logging backward bottom up;
+ *	terminate at the last extent entry at the current subtree
+ *	root page covering new down size.
+ *	truncation may occur within the last extent entry.
  *
  * parameter:
- *      int           tid,
- *      struct inode    *ip,
- *      s64           newsize,
- *      int           type)   {PWMAP, PMAP, WMAP; DELETE, TRUNCATE}
+ *	int		tid,
+ *	struct inode	*ip,
+ *	s64		newsize,
+ *	int		type)	{PWMAP, PMAP, WMAP; DELETE, TRUNCATE}
  *
  * return:
  *
  * note:
- *      PWMAP:
- *       1. truncate (non-COMMIT_NOLINK file)
- *          by jfs_truncate() or jfs_open(O_TRUNC):
- *          xtree is updated;
+ *	PWMAP:
+ *	 1. truncate (non-COMMIT_NOLINK file)
+ *	    by jfs_truncate() or jfs_open(O_TRUNC):
+ *	    xtree is updated;
  *	 2. truncate index table of directory when last entry removed
- *       map update via tlock at commit time;
- *      PMAP:
+ *	map update via tlock at commit time;
+ *	PMAP:
  *	 Call xtTruncate_pmap instead
- *      WMAP:
- *       1. remove (free zero link count) on last reference release
- *          (pmap has been freed at commit zero link count);
- *       2. truncate (COMMIT_NOLINK file, i.e., tmp file):
- *          xtree is updated;
- *       map update directly at truncation time;
+ *	WMAP:
+ *	 1. remove (free zero link count) on last reference release
+ *	    (pmap has been freed at commit zero link count);
+ *	 2. truncate (COMMIT_NOLINK file, i.e., tmp file):
+ *	    xtree is updated;
+ *	 map update directly at truncation time;
  *
- *      if (DELETE)
- *              no LOG_NOREDOPAGE is required (NOREDOFILE is sufficient);
- *      else if (TRUNCATE)
- *              must write LOG_NOREDOPAGE for deleted index page;
+ *	if (DELETE)
+ *		no LOG_NOREDOPAGE is required (NOREDOFILE is sufficient);
+ *	else if (TRUNCATE)
+ *		must write LOG_NOREDOPAGE for deleted index page;
  *
  * pages may already have been tlocked by anonymous transactions
  * during file growth (i.e., write) before truncation;
@@ -3493,7 +3490,7 @@ s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int flag)
 	 * retained in the new sized file.
 	 * if type is PMAP, the data and index pages are NOT
 	 * freed, and the data and index blocks are NOT freed
-	 * from  working map.
+	 * from working map.
 	 * (this will allow continued access of data/index of
 	 * temporary file (zerolink count file truncated to zero-length)).
 	 */
@@ -3542,7 +3539,7 @@ s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int flag)
 		goto getChild;
 
 	/*
-	 *      leaf page
+	 *	leaf page
 	 */
 	freed = 0;
 
@@ -3916,7 +3913,7 @@ s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int flag)
 	}
 
 	/*
-	 *      internal page: go down to child page of current entry
+	 *	internal page: go down to child page of current entry
 	 */
       getChild:
 	/* save current parent entry for the child page */
@@ -3965,7 +3962,7 @@ s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int flag)
 
 
 /*
- *      xtTruncate_pmap()
+ *	xtTruncate_pmap()
  *
  * function:
  *	Perform truncate to zero lenghth for deleted file, leaving the
@@ -3974,9 +3971,9 @@ s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int flag)
  *	is committed to disk.
  *
  * parameter:
- *      tid_t		tid,
- *      struct inode	*ip,
- *      s64		committed_size)
+ *	tid_t		tid,
+ *	struct inode	*ip,
+ *	s64		committed_size)
  *
  * return: new committed size
  *
@@ -4050,7 +4047,7 @@ s64 xtTruncate_pmap(tid_t tid, struct inode *ip, s64 committed_size)
 	}
 
 	/*
-	 *      leaf page
+	 *	leaf page
 	 */
 
 	if (++locked_leaves > MAX_TRUNCATE_LEAVES) {
@@ -4062,7 +4059,7 @@ s64 xtTruncate_pmap(tid_t tid, struct inode *ip, s64 committed_size)
 		xoff = offsetXAD(xad);
 		xlen = lengthXAD(xad);
 		XT_PUTPAGE(mp);
-		return  (xoff + xlen) << JFS_SBI(ip->i_sb)->l2bsize;
+		return (xoff + xlen) << JFS_SBI(ip->i_sb)->l2bsize;
 	}
 	tlck = txLock(tid, ip, mp, tlckXTREE);
 	tlck->type = tlckXTREE | tlckFREE;
@@ -4099,8 +4096,7 @@ s64 xtTruncate_pmap(tid_t tid, struct inode *ip, s64 committed_size)
 		 */
 		tlck = txLock(tid, ip, mp, tlckXTREE);
 		xtlck = (struct xtlock *) & tlck->lock;
-		xtlck->hwm.offset =
-		    le16_to_cpu(p->header.nextindex) - 1;
+		xtlck->hwm.offset = le16_to_cpu(p->header.nextindex) - 1;
 		tlck->type = tlckXTREE | tlckFREE;
 
 		XT_PUTPAGE(mp);
@@ -4118,7 +4114,7 @@ s64 xtTruncate_pmap(tid_t tid, struct inode *ip, s64 committed_size)
 	else
 		index--;
 	/*
-	 *      internal page: go down to child page of current entry
+	 *	internal page: go down to child page of current entry
 	 */
       getChild:
 	/* save current parent entry for the child page */
diff --git a/fs/jfs/jfs_xtree.h b/fs/jfs/jfs_xtree.h
index 164f6f2..70815c8a3 100644
--- a/fs/jfs/jfs_xtree.h
+++ b/fs/jfs/jfs_xtree.h
@@ -19,14 +19,14 @@
 #define _H_JFS_XTREE
 
 /*
- *      jfs_xtree.h: extent allocation descriptor B+-tree manager
+ *	jfs_xtree.h: extent allocation descriptor B+-tree manager
  */
 
 #include "jfs_btree.h"
 
 
 /*
- *      extent allocation descriptor (xad)
+ *	extent allocation descriptor (xad)
  */
 typedef struct xad {
 	unsigned flag:8;	/* 1: flag */
@@ -38,30 +38,30 @@ typedef struct xad {
 	__le32 addr2;		/* 4: address in unit of fsblksize */
 } xad_t;			/* (16) */
 
-#define MAXXLEN         ((1 << 24) - 1)
+#define MAXXLEN		((1 << 24) - 1)
 
-#define XTSLOTSIZE      16
-#define L2XTSLOTSIZE    4
+#define XTSLOTSIZE	16
+#define L2XTSLOTSIZE	4
 
 /* xad_t field construction */
 #define XADoffset(xad, offset64)\
 {\
-        (xad)->off1 = ((u64)offset64) >> 32;\
-        (xad)->off2 = __cpu_to_le32((offset64) & 0xffffffff);\
+	(xad)->off1 = ((u64)offset64) >> 32;\
+	(xad)->off2 = __cpu_to_le32((offset64) & 0xffffffff);\
 }
 #define XADaddress(xad, address64)\
 {\
-        (xad)->addr1 = ((u64)address64) >> 32;\
-        (xad)->addr2 = __cpu_to_le32((address64) & 0xffffffff);\
+	(xad)->addr1 = ((u64)address64) >> 32;\
+	(xad)->addr2 = __cpu_to_le32((address64) & 0xffffffff);\
 }
-#define XADlength(xad, length32)        (xad)->len = __cpu_to_le24(length32)
+#define XADlength(xad, length32)	(xad)->len = __cpu_to_le24(length32)
 
 /* xad_t field extraction */
 #define offsetXAD(xad)\
-        ( ((s64)((xad)->off1)) << 32 | __le32_to_cpu((xad)->off2))
+	( ((s64)((xad)->off1)) << 32 | __le32_to_cpu((xad)->off2))
 #define addressXAD(xad)\
-        ( ((s64)((xad)->addr1)) << 32 | __le32_to_cpu((xad)->addr2))
-#define lengthXAD(xad)  __le24_to_cpu((xad)->len)
+	( ((s64)((xad)->addr1)) << 32 | __le32_to_cpu((xad)->addr2))
+#define lengthXAD(xad)	__le24_to_cpu((xad)->len)
 
 /* xad list */
 struct xadlist {
@@ -71,22 +71,22 @@ struct xadlist {
 };
 
 /* xad_t flags */
-#define XAD_NEW         0x01	/* new */
-#define XAD_EXTENDED    0x02	/* extended */
-#define XAD_COMPRESSED  0x04	/* compressed with recorded length */
+#define XAD_NEW		0x01	/* new */
+#define XAD_EXTENDED	0x02	/* extended */
+#define XAD_COMPRESSED	0x04	/* compressed with recorded length */
 #define XAD_NOTRECORDED 0x08	/* allocated but not recorded */
-#define XAD_COW         0x10	/* copy-on-write */
+#define XAD_COW		0x10	/* copy-on-write */
 
 
 /* possible values for maxentry */
-#define XTROOTINITSLOT_DIR  6
-#define XTROOTINITSLOT  10
-#define XTROOTMAXSLOT   18
-#define XTPAGEMAXSLOT   256
-#define XTENTRYSTART    2
+#define XTROOTINITSLOT_DIR 6
+#define XTROOTINITSLOT	10
+#define XTROOTMAXSLOT	18
+#define XTPAGEMAXSLOT	256
+#define XTENTRYSTART	2
 
 /*
- *      xtree page:
+ *	xtree page:
  */
 typedef union {
 	struct xtheader {
@@ -106,7 +106,7 @@ typedef union {
 } xtpage_t;
 
 /*
- *      external declaration
+ *	external declaration
  */
 extern int xtLookup(struct inode *ip, s64 lstart, s64 llen,
 		    int *pflag, s64 * paddr, int *plen, int flag);
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 41c2047..932797b 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -328,7 +328,7 @@ static int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode)
  *		dentry	- child directory dentry
  *
  * RETURN:	-EINVAL	- if name is . or ..
- *		-EINVAL  - if . or .. exist but are invalid.
+ *		-EINVAL - if . or .. exist but are invalid.
  *		errors from subroutines
  *
  * note:
@@ -517,7 +517,7 @@ static int jfs_unlink(struct inode *dip, struct dentry *dentry)
 	inode_dec_link_count(ip);
 
 	/*
-	 *      commit zero link count object
+	 *	commit zero link count object
 	 */
 	if (ip->i_nlink == 0) {
 		assert(!test_cflag(COMMIT_Nolink, ip));
@@ -596,7 +596,7 @@ static int jfs_unlink(struct inode *dip, struct dentry *dentry)
 /*
  * NAME:	commitZeroLink()
  *
- * FUNCTION:    for non-directory, called by jfs_remove(),
+ * FUNCTION:	for non-directory, called by jfs_remove(),
  *		truncate a regular file, directory or symbolic
  *		link to zero length. return 0 if type is not
  *		one of these.
@@ -676,7 +676,7 @@ static s64 commitZeroLink(tid_t tid, struct inode *ip)
 /*
  * NAME:	jfs_free_zero_link()
  *
- * FUNCTION:    for non-directory, called by iClose(),
+ * FUNCTION:	for non-directory, called by iClose(),
  *		free resources of a file from cache and WORKING map
  *		for a file previously committed with zero link count
  *		while associated with a pager object,
@@ -855,12 +855,12 @@ static int jfs_link(struct dentry *old_dentry,
  * NAME:	jfs_symlink(dip, dentry, name)
  *
  * FUNCTION:	creates a symbolic link to <symlink> by name <name>
- *		        in directory <dip>
+ *			in directory <dip>
  *
- * PARAMETER:	dip	    - parent directory vnode
- *		        dentry	- dentry of symbolic link
- *		        name    - the path name of the existing object
- *			              that will be the source of the link
+ * PARAMETER:	dip	- parent directory vnode
+ *		dentry	- dentry of symbolic link
+ *		name	- the path name of the existing object
+ *			  that will be the source of the link
  *
  * RETURN:	errors from subroutines
  *
@@ -1052,9 +1052,9 @@ static int jfs_symlink(struct inode *dip, struct dentry *dentry,
 
 
 /*
- * NAME:        jfs_rename
+ * NAME:	jfs_rename
  *
- * FUNCTION:    rename a file or directory
+ * FUNCTION:	rename a file or directory
  */
 static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	       struct inode *new_dir, struct dentry *new_dentry)
@@ -1331,9 +1331,9 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 
 
 /*
- * NAME:        jfs_mknod
+ * NAME:	jfs_mknod
  *
- * FUNCTION:    Create a special file (device)
+ * FUNCTION:	Create a special file (device)
  */
 static int jfs_mknod(struct inode *dir, struct dentry *dentry,
 		int mode, dev_t rdev)
@@ -1477,6 +1477,38 @@ static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struc
 	return dentry;
 }
 
+struct dentry *jfs_get_dentry(struct super_block *sb, void *vobjp)
+{
+	__u32 *objp = vobjp;
+	unsigned long ino = objp[0];
+	__u32 generation = objp[1];
+	struct inode *inode;
+	struct dentry *result;
+
+	if (ino == 0)
+		return ERR_PTR(-ESTALE);
+	inode = iget(sb, ino);
+	if (inode == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	if (is_bad_inode(inode) ||
+	    (generation && inode->i_generation != generation)) {
+	    	result = ERR_PTR(-ESTALE);
+		goto out_iput;
+	}
+
+	result = d_alloc_anon(inode);
+	if (!result) {
+		result = ERR_PTR(-ENOMEM);
+		goto out_iput;
+	}
+	return result;
+
+ out_iput:
+	iput(inode);
+	return result;
+}
+
 struct dentry *jfs_get_parent(struct dentry *dentry)
 {
 	struct super_block *sb = dentry->d_inode->i_sb;
diff --git a/fs/jfs/resize.c b/fs/jfs/resize.c
index 79d625f..71984ee 100644
--- a/fs/jfs/resize.c
+++ b/fs/jfs/resize.c
@@ -29,17 +29,17 @@
 #include "jfs_txnmgr.h"
 #include "jfs_debug.h"
 
-#define BITSPERPAGE     (PSIZE << 3)
-#define L2MEGABYTE      20
-#define MEGABYTE        (1 << L2MEGABYTE)
-#define MEGABYTE32     (MEGABYTE << 5)
+#define BITSPERPAGE	(PSIZE << 3)
+#define L2MEGABYTE	20
+#define MEGABYTE	(1 << L2MEGABYTE)
+#define MEGABYTE32	(MEGABYTE << 5)
 
 /* convert block number to bmap file page number */
 #define BLKTODMAPN(b)\
-        (((b) >> 13) + ((b) >> 23) + ((b) >> 33) + 3 + 1)
+	(((b) >> 13) + ((b) >> 23) + ((b) >> 33) + 3 + 1)
 
 /*
- *      jfs_extendfs()
+ *	jfs_extendfs()
  *
  * function: extend file system;
  *
@@ -48,9 +48,9 @@
  *                                   workspace  space
  *
  * input:
- *      new LVSize: in LV blocks (required)
- *      new LogSize: in LV blocks (optional)
- *      new FSSize: in LV blocks (optional)
+ *	new LVSize: in LV blocks (required)
+ *	new LogSize: in LV blocks (optional)
+ *	new FSSize: in LV blocks (optional)
  *
  * new configuration:
  * 1. set new LogSize as specified or default from new LVSize;
@@ -125,8 +125,8 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 	}
 
 	/*
-	 *      reconfigure LV spaces
-	 *      ---------------------
+	 *	reconfigure LV spaces
+	 *	---------------------
 	 *
 	 * validate new size, or, if not specified, determine new size
 	 */
@@ -198,7 +198,7 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 		log_formatted = 1;
 	}
 	/*
-	 *      quiesce file system
+	 *	quiesce file system
 	 *
 	 * (prepare to move the inline log and to prevent map update)
 	 *
@@ -270,8 +270,8 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 	}
 
 	/*
-	 *      extend block allocation map
-	 *      ---------------------------
+	 *	extend block allocation map
+	 *	---------------------------
 	 *
 	 * extendfs() for new extension, retry after crash recovery;
 	 *
@@ -283,7 +283,7 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 	 *  s_size: aggregate size in physical blocks;
 	 */
 	/*
-	 *      compute the new block allocation map configuration
+	 *	compute the new block allocation map configuration
 	 *
 	 * map dinode:
 	 *  di_size: map file size in byte;
@@ -301,7 +301,7 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 	newNpages = BLKTODMAPN(t64) + 1;
 
 	/*
-	 *      extend map from current map (WITHOUT growing mapfile)
+	 *	extend map from current map (WITHOUT growing mapfile)
 	 *
 	 * map new extension with unmapped part of the last partial
 	 * dmap page, if applicable, and extra page(s) allocated
@@ -341,8 +341,8 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 	XSize -= nblocks;
 
 	/*
-	 *      grow map file to cover remaining extension
-	 *      and/or one extra dmap page for next extendfs();
+	 *	grow map file to cover remaining extension
+	 *	and/or one extra dmap page for next extendfs();
 	 *
 	 * allocate new map pages and its backing blocks, and
 	 * update map file xtree
@@ -422,8 +422,8 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 	dbFinalizeBmap(ipbmap);
 
 	/*
-	 *      update inode allocation map
-	 *      ---------------------------
+	 *	update inode allocation map
+	 *	---------------------------
 	 *
 	 * move iag lists from old to new iag;
 	 * agstart field is not updated for logredo() to reconstruct
@@ -442,8 +442,8 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 	}
 
 	/*
-	 *      finalize
-	 *      --------
+	 *	finalize
+	 *	--------
 	 *
 	 * extension is committed when on-disk super block is
 	 * updated with new descriptors: logredo will recover
@@ -480,7 +480,7 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 	diFreeSpecial(ipbmap2);
 
 	/*
-	 *      update superblock
+	 *	update superblock
 	 */
 	if ((rc = readSuper(sb, &bh)))
 		goto error_out;
@@ -530,7 +530,7 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 
       resume:
 	/*
-	 *      resume file system transactions
+	 *	resume file system transactions
 	 */
 	txResume(sb);
 
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 20e4ac1..929fcec 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -27,6 +27,7 @@
 #include <linux/kthread.h>
 #include <linux/posix_acl.h>
 #include <linux/buffer_head.h>
+#include <linux/exportfs.h>
 #include <asm/uaccess.h>
 #include <linux/seq_file.h>
 
@@ -737,6 +738,7 @@ static const struct super_operations jfs_super_operations = {
 };
 
 static struct export_operations jfs_export_operations = {
+	.get_dentry	= jfs_get_dentry,
 	.get_parent	= jfs_get_parent,
 };
 
diff --git a/fs/jfs/xattr.c b/fs/jfs/xattr.c
index b753ba2..9b7f2cd 100644
--- a/fs/jfs/xattr.c
+++ b/fs/jfs/xattr.c
@@ -63,9 +63,9 @@
  *
  *   On-disk:
  *
- *     FEALISTs are stored on disk using blocks allocated by dbAlloc() and
- *     written directly. An EA list may be in-lined in the inode if there is
- *     sufficient room available.
+ *	FEALISTs are stored on disk using blocks allocated by dbAlloc() and
+ *	written directly. An EA list may be in-lined in the inode if there is
+ *	sufficient room available.
  */
 
 struct ea_buffer {
@@ -590,7 +590,8 @@ static int ea_get(struct inode *inode, struct ea_buffer *ea_buf, int min_size)
       size_check:
 	if (EALIST_SIZE(ea_buf->xattr) != ea_size) {
 		printk(KERN_ERR "ea_get: invalid extended attribute\n");
-		dump_mem("xattr", ea_buf->xattr, ea_size);
+		print_hex_dump(KERN_ERR, "", DUMP_PREFIX_ADDRESS, 16, 1,
+				     ea_buf->xattr, ea_size, 1);
 		ea_release(inode, ea_buf);
 		rc = -EIO;
 		goto clean_up;
@@ -696,7 +697,7 @@ static int can_set_system_xattr(struct inode *inode, const char *name,
 	struct posix_acl *acl;
 	int rc;
 
-	if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+	if (!is_owner_or_cap(inode))
 		return -EPERM;
 
 	/*
diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index 96070bf..572601e9 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -44,9 +44,8 @@ static struct nsm_handle *	nsm_find(const struct sockaddr_in *sin,
  */
 static struct nlm_host *
 nlm_lookup_host(int server, const struct sockaddr_in *sin,
-					int proto, int version,
-					const char *hostname,
-					int hostname_len)
+		int proto, int version, const char *hostname,
+		int hostname_len, const struct sockaddr_in *ssin)
 {
 	struct hlist_head *chain;
 	struct hlist_node *pos;
@@ -54,7 +53,9 @@ nlm_lookup_host(int server, const struct sockaddr_in *sin,
 	struct nsm_handle *nsm = NULL;
 	int		hash;
 
-	dprintk("lockd: nlm_lookup_host(%u.%u.%u.%u, p=%d, v=%d, my role=%s, name=%.*s)\n",
+	dprintk("lockd: nlm_lookup_host("NIPQUAD_FMT"->"NIPQUAD_FMT
+			", p=%d, v=%d, my role=%s, name=%.*s)\n",
+			NIPQUAD(ssin->sin_addr.s_addr),
 			NIPQUAD(sin->sin_addr.s_addr), proto, version,
 			server? "server" : "client",
 			hostname_len,
@@ -91,6 +92,8 @@ nlm_lookup_host(int server, const struct sockaddr_in *sin,
 			continue;
 		if (host->h_server != server)
 			continue;
+		if (!nlm_cmp_addr(&host->h_saddr, ssin))
+			continue;
 
 		/* Move to head of hash chain. */
 		hlist_del(&host->h_hash);
@@ -118,6 +121,7 @@ nlm_lookup_host(int server, const struct sockaddr_in *sin,
 	host->h_name	   = nsm->sm_name;
 	host->h_addr       = *sin;
 	host->h_addr.sin_port = 0;	/* ouch! */
+	host->h_saddr	   = *ssin;
 	host->h_version    = version;
 	host->h_proto      = proto;
 	host->h_rpcclnt    = NULL;
@@ -161,15 +165,9 @@ nlm_destroy_host(struct nlm_host *host)
 	 */
 	nsm_unmonitor(host);
 
-	if ((clnt = host->h_rpcclnt) != NULL) {
-		if (atomic_read(&clnt->cl_users)) {
-			printk(KERN_WARNING
-				"lockd: active RPC handle\n");
-			clnt->cl_dead = 1;
-		} else {
-			rpc_destroy_client(host->h_rpcclnt);
-		}
-	}
+	clnt = host->h_rpcclnt;
+	if (clnt != NULL)
+		rpc_shutdown_client(clnt);
 	kfree(host);
 }
 
@@ -180,8 +178,10 @@ struct nlm_host *
 nlmclnt_lookup_host(const struct sockaddr_in *sin, int proto, int version,
 			const char *hostname, int hostname_len)
 {
+	struct sockaddr_in ssin = {0};
+
 	return nlm_lookup_host(0, sin, proto, version,
-			       hostname, hostname_len);
+			       hostname, hostname_len, &ssin);
 }
 
 /*
@@ -191,9 +191,12 @@ struct nlm_host *
 nlmsvc_lookup_host(struct svc_rqst *rqstp,
 			const char *hostname, int hostname_len)
 {
+	struct sockaddr_in ssin = {0};
+
+	ssin.sin_addr = rqstp->rq_daddr.addr;
 	return nlm_lookup_host(1, svc_addr_in(rqstp),
 			       rqstp->rq_prot, rqstp->rq_vers,
-			       hostname, hostname_len);
+			       hostname, hostname_len, &ssin);
 }
 
 /*
@@ -204,8 +207,9 @@ nlm_bind_host(struct nlm_host *host)
 {
 	struct rpc_clnt	*clnt;
 
-	dprintk("lockd: nlm_bind_host(%08x)\n",
-			(unsigned)ntohl(host->h_addr.sin_addr.s_addr));
+	dprintk("lockd: nlm_bind_host("NIPQUAD_FMT"->"NIPQUAD_FMT")\n",
+			NIPQUAD(host->h_saddr.sin_addr),
+			NIPQUAD(host->h_addr.sin_addr));
 
 	/* Lock host handle */
 	mutex_lock(&host->h_mutex);
@@ -232,6 +236,7 @@ nlm_bind_host(struct nlm_host *host)
 			.protocol	= host->h_proto,
 			.address	= (struct sockaddr *)&host->h_addr,
 			.addrsize	= sizeof(host->h_addr),
+			.saddress	= (struct sockaddr *)&host->h_saddr,
 			.timeout	= &timeparms,
 			.servername	= host->h_name,
 			.program	= &nlm_program,
diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index 2102e2d..3353ed8 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -61,6 +61,7 @@ nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res)
 			status);
 	else
 		status = 0;
+	rpc_shutdown_client(clnt);
  out:
 	return status;
 }
@@ -138,7 +139,6 @@ nsm_create(void)
 		.program	= &nsm_program,
 		.version	= SM_VERSION,
 		.authflavor	= RPC_AUTH_NULL,
-		.flags		= (RPC_CLNT_CREATE_ONESHOT),
 	};
 
 	return rpc_create(&args);
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 126b1bf..82e2192 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -25,6 +25,7 @@
 #include <linux/smp.h>
 #include <linux/smp_lock.h>
 #include <linux/mutex.h>
+#include <linux/freezer.h>
 
 #include <linux/sunrpc/types.h>
 #include <linux/sunrpc/stats.h>
@@ -75,18 +76,31 @@ static const int		nlm_port_min = 0, nlm_port_max = 65535;
 
 static struct ctl_table_header * nlm_sysctl_table;
 
-static unsigned long set_grace_period(void)
+static unsigned long get_lockd_grace_period(void)
 {
-	unsigned long grace_period;
-
 	/* Note: nlm_timeout should always be nonzero */
 	if (nlm_grace_period)
-		grace_period = ((nlm_grace_period + nlm_timeout - 1)
-				/ nlm_timeout) * nlm_timeout * HZ;
+		return roundup(nlm_grace_period, nlm_timeout) * HZ;
 	else
-		grace_period = nlm_timeout * 5 * HZ;
+		return nlm_timeout * 5 * HZ;
+}
+
+unsigned long get_nfs_grace_period(void)
+{
+	unsigned long lockdgrace = get_lockd_grace_period();
+	unsigned long nfsdgrace = 0;
+
+	if (nlmsvc_ops)
+		nfsdgrace = nlmsvc_ops->get_grace_period();
+
+	return max(lockdgrace, nfsdgrace);
+}
+EXPORT_SYMBOL(get_nfs_grace_period);
+
+static unsigned long set_grace_period(void)
+{
 	nlmsvc_grace_period = 1;
-	return grace_period + jiffies;
+	return get_nfs_grace_period() + jiffies;
 }
 
 static inline void clear_grace_period(void)
@@ -119,13 +133,11 @@ lockd(struct svc_rqst *rqstp)
 	complete(&lockd_start_done);
 
 	daemonize("lockd");
+	set_freezable();
 
 	/* Process request with signals blocked, but allow SIGKILL.  */
 	allow_signal(SIGKILL);
 
-	/* kick rpciod */
-	rpciod_up();
-
 	dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n");
 
 	if (!nlm_timeout)
@@ -202,9 +214,6 @@ lockd(struct svc_rqst *rqstp)
 	/* Exit the RPC thread */
 	svc_exit_thread(rqstp);
 
-	/* release rpciod */
-	rpciod_down();
-
 	/* Release module */
 	unlock_kernel();
 	module_put_and_exit(0);
diff --git a/fs/mbcache.c b/fs/mbcache.c
index deeb9dc..fbb1d02 100644
--- a/fs/mbcache.c
+++ b/fs/mbcache.c
@@ -100,7 +100,6 @@ struct mb_cache {
 static LIST_HEAD(mb_cache_list);
 static LIST_HEAD(mb_cache_lru_list);
 static DEFINE_SPINLOCK(mb_cache_spinlock);
-static struct shrinker *mb_shrinker;
 
 static inline int
 mb_cache_indexes(struct mb_cache *cache)
@@ -118,6 +117,10 @@ mb_cache_indexes(struct mb_cache *cache)
 
 static int mb_cache_shrink_fn(int nr_to_scan, gfp_t gfp_mask);
 
+static struct shrinker mb_cache_shrinker = {
+	.shrink = mb_cache_shrink_fn,
+	.seeks = DEFAULT_SEEKS,
+};
 
 static inline int
 __mb_cache_entry_is_hashed(struct mb_cache_entry *ce)
@@ -662,13 +665,13 @@ mb_cache_entry_find_next(struct mb_cache_entry *prev, int index,
 
 static int __init init_mbcache(void)
 {
-	mb_shrinker = set_shrinker(DEFAULT_SEEKS, mb_cache_shrink_fn);
+	register_shrinker(&mb_cache_shrinker);
 	return 0;
 }
 
 static void __exit exit_mbcache(void)
 {
-	remove_shrinker(mb_shrinker);
+	unregister_shrinker(&mb_cache_shrinker);
 }
 
 module_init(init_mbcache)
diff --git a/fs/minix/file.c b/fs/minix/file.c
index f92baa1..17765f6 100644
--- a/fs/minix/file.c
+++ b/fs/minix/file.c
@@ -23,7 +23,7 @@ const struct file_operations minix_file_operations = {
 	.aio_write	= generic_file_aio_write,
 	.mmap		= generic_file_mmap,
 	.fsync		= minix_sync_file,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 };
 
 const struct inode_operations minix_file_inode_operations = {
diff --git a/fs/namei.c b/fs/namei.c
index 5e2d98d..defaa47 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1576,7 +1576,7 @@ int may_open(struct nameidata *nd, int acc_mode, int flag)
 
 	/* O_NOATIME can only be set by the owner or superuser */
 	if (flag & O_NOATIME)
-		if (current->fsuid != inode->i_uid && !capable(CAP_FOWNER))
+		if (!is_owner_or_cap(inode))
 			return -EPERM;
 
 	/*
diff --git a/fs/namespace.c b/fs/namespace.c
index b696e3a..4198003 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -28,6 +28,7 @@
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 #include "pnode.h"
+#include "internal.h"
 
 /* spinlock for vfsmount related operations, inplace of dcache_lock */
 __cacheline_aligned_in_smp DEFINE_SPINLOCK(vfsmount_lock);
@@ -320,22 +321,16 @@ EXPORT_SYMBOL(mnt_unpin);
 static void *m_start(struct seq_file *m, loff_t *pos)
 {
 	struct mnt_namespace *n = m->private;
-	struct list_head *p;
-	loff_t l = *pos;
 
 	down_read(&namespace_sem);
-	list_for_each(p, &n->list)
-		if (!l--)
-			return list_entry(p, struct vfsmount, mnt_list);
-	return NULL;
+	return seq_list_start(&n->list, *pos);
 }
 
 static void *m_next(struct seq_file *m, void *v, loff_t *pos)
 {
 	struct mnt_namespace *n = m->private;
-	struct list_head *p = ((struct vfsmount *)v)->mnt_list.next;
-	(*pos)++;
-	return p == &n->list ? NULL : list_entry(p, struct vfsmount, mnt_list);
+
+	return seq_list_next(v, &n->list, pos);
 }
 
 static void m_stop(struct seq_file *m, void *v)
@@ -350,7 +345,7 @@ static inline void mangle(struct seq_file *m, const char *s)
 
 static int show_vfsmnt(struct seq_file *m, void *v)
 {
-	struct vfsmount *mnt = v;
+	struct vfsmount *mnt = list_entry(v, struct vfsmount, mnt_list);
 	int err = 0;
 	static struct proc_fs_info {
 		int flag;
@@ -405,7 +400,7 @@ struct seq_operations mounts_op = {
 
 static int show_vfsstat(struct seq_file *m, void *v)
 {
-	struct vfsmount *mnt = v;
+	struct vfsmount *mnt = list_entry(v, struct vfsmount, mnt_list);
 	int err = 0;
 
 	/* device */
@@ -1457,7 +1452,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
 
 	new_ns = kmalloc(sizeof(struct mnt_namespace), GFP_KERNEL);
 	if (!new_ns)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
 	atomic_set(&new_ns->count, 1);
 	INIT_LIST_HEAD(&new_ns->list);
@@ -1471,7 +1466,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
 	if (!new_ns->root) {
 		up_write(&namespace_sem);
 		kfree(new_ns);
-		return NULL;
+		return ERR_PTR(-ENOMEM);;
 	}
 	spin_lock(&vfsmount_lock);
 	list_add_tail(&new_ns->list, &new_ns->root->mnt_list);
@@ -1515,7 +1510,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
 	return new_ns;
 }
 
-struct mnt_namespace *copy_mnt_ns(int flags, struct mnt_namespace *ns,
+struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns,
 		struct fs_struct *new_fs)
 {
 	struct mnt_namespace *new_ns;
diff --git a/fs/ncpfs/file.c b/fs/ncpfs/file.c
index d3152f8..2b145de 100644
--- a/fs/ncpfs/file.c
+++ b/fs/ncpfs/file.c
@@ -203,7 +203,6 @@ ncp_file_write(struct file *file, const char __user *buf, size_t count, loff_t *
 
 	if (pos + count > MAX_NON_LFS && !(file->f_flags&O_LARGEFILE)) {
 		if (pos >= MAX_NON_LFS) {
-			send_sig(SIGXFSZ, current, 0);
 			return -EFBIG;
 		}
 		if (count > MAX_NON_LFS - (u32)pos) {
@@ -212,7 +211,6 @@ ncp_file_write(struct file *file, const char __user *buf, size_t count, loff_t *
 	}
 	if (pos >= inode->i_sb->s_maxbytes) {
 		if (count || pos > inode->i_sb->s_maxbytes) {
-			send_sig(SIGXFSZ, current, 0);
 			return -EFBIG;
 		}
 	}
diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index f4580b4..b55cb23 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -6,8 +6,8 @@ obj-$(CONFIG_NFS_FS) += nfs.o
 
 nfs-y 			:= client.o dir.o file.o getroot.o inode.o super.o nfs2xdr.o \
 			   pagelist.o proc.o read.o symlink.o unlink.o \
-			   write.o namespace.o
-nfs-$(CONFIG_ROOT_NFS)	+= nfsroot.o mount_clnt.o      
+			   write.o namespace.o mount_clnt.o
+nfs-$(CONFIG_ROOT_NFS)	+= nfsroot.o
 nfs-$(CONFIG_NFS_V3)	+= nfs3proc.o nfs3xdr.o
 nfs-$(CONFIG_NFS_V3_ACL)	+= nfs3acl.o
 nfs-$(CONFIG_NFS_V4)	+= nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o \
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 75f309c..a796be5 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -14,6 +14,7 @@
 #include <linux/sunrpc/svcsock.h>
 #include <linux/nfs_fs.h>
 #include <linux/mutex.h>
+#include <linux/freezer.h>
 
 #include <net/inet_sock.h>
 
@@ -67,6 +68,7 @@ static void nfs_callback_svc(struct svc_rqst *rqstp)
 	daemonize("nfsv4-svc");
 	/* Process request with signals blocked, but allow SIGKILL.  */
 	allow_signal(SIGKILL);
+	set_freezable();
 
 	complete(&nfs_callback_info.started);
 
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 881fa49..a49f9fe 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -102,19 +102,10 @@ static struct nfs_client *nfs_alloc_client(const char *hostname,
 					   int nfsversion)
 {
 	struct nfs_client *clp;
-	int error;
 
 	if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
 		goto error_0;
 
-	error = rpciod_up();
-	if (error < 0) {
-		dprintk("%s: couldn't start rpciod! Error = %d\n",
-				__FUNCTION__, error);
-		goto error_1;
-	}
-	__set_bit(NFS_CS_RPCIOD, &clp->cl_res_state);
-
 	if (nfsversion == 4) {
 		if (nfs_callback_up() < 0)
 			goto error_2;
@@ -139,8 +130,6 @@ static struct nfs_client *nfs_alloc_client(const char *hostname,
 #ifdef CONFIG_NFS_V4
 	init_rwsem(&clp->cl_sem);
 	INIT_LIST_HEAD(&clp->cl_delegations);
-	INIT_LIST_HEAD(&clp->cl_state_owners);
-	INIT_LIST_HEAD(&clp->cl_unused);
 	spin_lock_init(&clp->cl_lock);
 	INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
 	rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
@@ -154,9 +143,6 @@ error_3:
 	if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
 		nfs_callback_down();
 error_2:
-	rpciod_down();
-	__clear_bit(NFS_CS_RPCIOD, &clp->cl_res_state);
-error_1:
 	kfree(clp);
 error_0:
 	return NULL;
@@ -167,16 +153,7 @@ static void nfs4_shutdown_client(struct nfs_client *clp)
 #ifdef CONFIG_NFS_V4
 	if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state))
 		nfs4_kill_renewd(clp);
-	while (!list_empty(&clp->cl_unused)) {
-		struct nfs4_state_owner *sp;
-
-		sp = list_entry(clp->cl_unused.next,
-				struct nfs4_state_owner,
-				so_list);
-		list_del(&sp->so_list);
-		kfree(sp);
-	}
-	BUG_ON(!list_empty(&clp->cl_state_owners));
+	BUG_ON(!RB_EMPTY_ROOT(&clp->cl_state_owners));
 	if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state))
 		nfs_idmap_delete(clp);
 #endif
@@ -198,9 +175,6 @@ static void nfs_free_client(struct nfs_client *clp)
 	if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
 		nfs_callback_down();
 
-	if (__test_and_clear_bit(NFS_CS_RPCIOD, &clp->cl_res_state))
-		rpciod_down();
-
 	kfree(clp->cl_hostname);
 	kfree(clp);
 
@@ -1232,23 +1206,9 @@ static int nfs_server_list_open(struct inode *inode, struct file *file)
  */
 static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
 {
-	struct list_head *_p;
-	loff_t pos = *_pos;
-
 	/* lock the list against modification */
 	spin_lock(&nfs_client_lock);
-
-	/* allow for the header line */
-	if (!pos)
-		return SEQ_START_TOKEN;
-	pos--;
-
-	/* find the n'th element in the list */
-	list_for_each(_p, &nfs_client_list)
-		if (!pos--)
-			break;
-
-	return _p != &nfs_client_list ? _p : NULL;
+	return seq_list_start_head(&nfs_client_list, *_pos);
 }
 
 /*
@@ -1256,14 +1216,7 @@ static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
  */
 static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
 {
-	struct list_head *_p;
-
-	(*pos)++;
-
-	_p = v;
-	_p = (v == SEQ_START_TOKEN) ? nfs_client_list.next : _p->next;
-
-	return _p != &nfs_client_list ? _p : NULL;
+	return seq_list_next(v, &nfs_client_list, pos);
 }
 
 /*
@@ -1282,7 +1235,7 @@ static int nfs_server_list_show(struct seq_file *m, void *v)
 	struct nfs_client *clp;
 
 	/* display header on line 1 */
-	if (v == SEQ_START_TOKEN) {
+	if (v == &nfs_client_list) {
 		seq_puts(m, "NV SERVER   PORT USE HOSTNAME\n");
 		return 0;
 	}
@@ -1323,23 +1276,9 @@ static int nfs_volume_list_open(struct inode *inode, struct file *file)
  */
 static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
 {
-	struct list_head *_p;
-	loff_t pos = *_pos;
-
 	/* lock the list against modification */
 	spin_lock(&nfs_client_lock);
-
-	/* allow for the header line */
-	if (!pos)
-		return SEQ_START_TOKEN;
-	pos--;
-
-	/* find the n'th element in the list */
-	list_for_each(_p, &nfs_volume_list)
-		if (!pos--)
-			break;
-
-	return _p != &nfs_volume_list ? _p : NULL;
+	return seq_list_start_head(&nfs_volume_list, *_pos);
 }
 
 /*
@@ -1347,14 +1286,7 @@ static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
  */
 static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
 {
-	struct list_head *_p;
-
-	(*pos)++;
-
-	_p = v;
-	_p = (v == SEQ_START_TOKEN) ? nfs_volume_list.next : _p->next;
-
-	return _p != &nfs_volume_list ? _p : NULL;
+	return seq_list_next(v, &nfs_volume_list, pos);
 }
 
 /*
@@ -1375,7 +1307,7 @@ static int nfs_volume_list_show(struct seq_file *m, void *v)
 	char dev[8], fsid[17];
 
 	/* display header on line 1 */
-	if (v == SEQ_START_TOKEN) {
+	if (v == &nfs_volume_list) {
 		seq_puts(m, "NV SERVER   PORT DEV     FSID\n");
 		return 0;
 	}
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 7f37d1b..20ac403 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -27,6 +27,13 @@ static void nfs_free_delegation(struct nfs_delegation *delegation)
 	kfree(delegation);
 }
 
+static void nfs_free_delegation_callback(struct rcu_head *head)
+{
+	struct nfs_delegation *delegation = container_of(head, struct nfs_delegation, rcu);
+
+	nfs_free_delegation(delegation);
+}
+
 static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_state *state)
 {
 	struct inode *inode = state->inode;
@@ -57,7 +64,7 @@ out_err:
 	return status;
 }
 
-static void nfs_delegation_claim_opens(struct inode *inode)
+static void nfs_delegation_claim_opens(struct inode *inode, const nfs4_stateid *stateid)
 {
 	struct nfs_inode *nfsi = NFS_I(inode);
 	struct nfs_open_context *ctx;
@@ -72,9 +79,11 @@ again:
 			continue;
 		if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
 			continue;
+		if (memcmp(state->stateid.data, stateid->data, sizeof(state->stateid.data)) != 0)
+			continue;
 		get_nfs_open_context(ctx);
 		spin_unlock(&inode->i_lock);
-		err = nfs4_open_delegation_recall(ctx->dentry, state);
+		err = nfs4_open_delegation_recall(ctx, state, stateid);
 		if (err >= 0)
 			err = nfs_delegation_claim_locks(ctx, state);
 		put_nfs_open_context(ctx);
@@ -115,10 +124,6 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
 	struct nfs_delegation *delegation;
 	int status = 0;
 
-	/* Ensure we first revalidate the attributes and page cache! */
-	if ((nfsi->cache_validity & (NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_ATTR)))
-		__nfs_revalidate_inode(NFS_SERVER(inode), inode);
-
 	delegation = kmalloc(sizeof(*delegation), GFP_KERNEL);
 	if (delegation == NULL)
 		return -ENOMEM;
@@ -131,10 +136,10 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
 	delegation->inode = inode;
 
 	spin_lock(&clp->cl_lock);
-	if (nfsi->delegation == NULL) {
-		list_add(&delegation->super_list, &clp->cl_delegations);
-		nfsi->delegation = delegation;
+	if (rcu_dereference(nfsi->delegation) == NULL) {
+		list_add_rcu(&delegation->super_list, &clp->cl_delegations);
 		nfsi->delegation_state = delegation->type;
+		rcu_assign_pointer(nfsi->delegation, delegation);
 		delegation = NULL;
 	} else {
 		if (memcmp(&delegation->stateid, &nfsi->delegation->stateid,
@@ -145,6 +150,12 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
 			status = -EIO;
 		}
 	}
+
+	/* Ensure we revalidate the attributes and page cache! */
+	spin_lock(&inode->i_lock);
+	nfsi->cache_validity |= NFS_INO_REVAL_FORCED;
+	spin_unlock(&inode->i_lock);
+
 	spin_unlock(&clp->cl_lock);
 	kfree(delegation);
 	return status;
@@ -155,7 +166,7 @@ static int nfs_do_return_delegation(struct inode *inode, struct nfs_delegation *
 	int res = 0;
 
 	res = nfs4_proc_delegreturn(inode, delegation->cred, &delegation->stateid);
-	nfs_free_delegation(delegation);
+	call_rcu(&delegation->rcu, nfs_free_delegation_callback);
 	return res;
 }
 
@@ -170,33 +181,55 @@ static void nfs_msync_inode(struct inode *inode)
 /*
  * Basic procedure for returning a delegation to the server
  */
-int __nfs_inode_return_delegation(struct inode *inode)
+static int __nfs_inode_return_delegation(struct inode *inode, struct nfs_delegation *delegation)
 {
 	struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
 	struct nfs_inode *nfsi = NFS_I(inode);
-	struct nfs_delegation *delegation;
-	int res = 0;
 
 	nfs_msync_inode(inode);
 	down_read(&clp->cl_sem);
 	/* Guard against new delegated open calls */
 	down_write(&nfsi->rwsem);
-	spin_lock(&clp->cl_lock);
-	delegation = nfsi->delegation;
-	if (delegation != NULL) {
-		list_del_init(&delegation->super_list);
-		nfsi->delegation = NULL;
-		nfsi->delegation_state = 0;
-	}
-	spin_unlock(&clp->cl_lock);
-	nfs_delegation_claim_opens(inode);
+	nfs_delegation_claim_opens(inode, &delegation->stateid);
 	up_write(&nfsi->rwsem);
 	up_read(&clp->cl_sem);
 	nfs_msync_inode(inode);
 
-	if (delegation != NULL)
-		res = nfs_do_return_delegation(inode, delegation);
-	return res;
+	return nfs_do_return_delegation(inode, delegation);
+}
+
+static struct nfs_delegation *nfs_detach_delegation_locked(struct nfs_inode *nfsi, const nfs4_stateid *stateid)
+{
+	struct nfs_delegation *delegation = rcu_dereference(nfsi->delegation);
+
+	if (delegation == NULL)
+		goto nomatch;
+	if (stateid != NULL && memcmp(delegation->stateid.data, stateid->data,
+				sizeof(delegation->stateid.data)) != 0)
+		goto nomatch;
+	list_del_rcu(&delegation->super_list);
+	nfsi->delegation_state = 0;
+	rcu_assign_pointer(nfsi->delegation, NULL);
+	return delegation;
+nomatch:
+	return NULL;
+}
+
+int nfs_inode_return_delegation(struct inode *inode)
+{
+	struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
+	struct nfs_inode *nfsi = NFS_I(inode);
+	struct nfs_delegation *delegation;
+	int err = 0;
+
+	if (rcu_dereference(nfsi->delegation) != NULL) {
+		spin_lock(&clp->cl_lock);
+		delegation = nfs_detach_delegation_locked(nfsi, NULL);
+		spin_unlock(&clp->cl_lock);
+		if (delegation != NULL)
+			err = __nfs_inode_return_delegation(inode, delegation);
+	}
+	return err;
 }
 
 /*
@@ -211,19 +244,23 @@ void nfs_return_all_delegations(struct super_block *sb)
 	if (clp == NULL)
 		return;
 restart:
-	spin_lock(&clp->cl_lock);
-	list_for_each_entry(delegation, &clp->cl_delegations, super_list) {
+	rcu_read_lock();
+	list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
 		if (delegation->inode->i_sb != sb)
 			continue;
 		inode = igrab(delegation->inode);
 		if (inode == NULL)
 			continue;
+		spin_lock(&clp->cl_lock);
+		delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL);
 		spin_unlock(&clp->cl_lock);
-		nfs_inode_return_delegation(inode);
+		rcu_read_unlock();
+		if (delegation != NULL)
+			__nfs_inode_return_delegation(inode, delegation);
 		iput(inode);
 		goto restart;
 	}
-	spin_unlock(&clp->cl_lock);
+	rcu_read_unlock();
 }
 
 static int nfs_do_expire_all_delegations(void *ptr)
@@ -234,22 +271,26 @@ static int nfs_do_expire_all_delegations(void *ptr)
 
 	allow_signal(SIGKILL);
 restart:
-	spin_lock(&clp->cl_lock);
 	if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) != 0)
 		goto out;
 	if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0)
 		goto out;
-	list_for_each_entry(delegation, &clp->cl_delegations, super_list) {
+	rcu_read_lock();
+	list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
 		inode = igrab(delegation->inode);
 		if (inode == NULL)
 			continue;
+		spin_lock(&clp->cl_lock);
+		delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL);
 		spin_unlock(&clp->cl_lock);
-		nfs_inode_return_delegation(inode);
+		rcu_read_unlock();
+		if (delegation)
+			__nfs_inode_return_delegation(inode, delegation);
 		iput(inode);
 		goto restart;
 	}
+	rcu_read_unlock();
 out:
-	spin_unlock(&clp->cl_lock);
 	nfs_put_client(clp);
 	module_put_and_exit(0);
 }
@@ -280,17 +321,21 @@ void nfs_handle_cb_pathdown(struct nfs_client *clp)
 	if (clp == NULL)
 		return;
 restart:
-	spin_lock(&clp->cl_lock);
-	list_for_each_entry(delegation, &clp->cl_delegations, super_list) {
+	rcu_read_lock();
+	list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
 		inode = igrab(delegation->inode);
 		if (inode == NULL)
 			continue;
+		spin_lock(&clp->cl_lock);
+		delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL);
 		spin_unlock(&clp->cl_lock);
-		nfs_inode_return_delegation(inode);
+		rcu_read_unlock();
+		if (delegation != NULL)
+			__nfs_inode_return_delegation(inode, delegation);
 		iput(inode);
 		goto restart;
 	}
-	spin_unlock(&clp->cl_lock);
+	rcu_read_unlock();
 }
 
 struct recall_threadargs {
@@ -316,21 +361,14 @@ static int recall_thread(void *data)
 	down_read(&clp->cl_sem);
 	down_write(&nfsi->rwsem);
 	spin_lock(&clp->cl_lock);
-	delegation = nfsi->delegation;
-	if (delegation != NULL && memcmp(delegation->stateid.data,
-				args->stateid->data,
-				sizeof(delegation->stateid.data)) == 0) {
-		list_del_init(&delegation->super_list);
-		nfsi->delegation = NULL;
-		nfsi->delegation_state = 0;
+	delegation = nfs_detach_delegation_locked(nfsi, args->stateid);
+	if (delegation != NULL)
 		args->result = 0;
-	} else {
-		delegation = NULL;
+	else
 		args->result = -ENOENT;
-	}
 	spin_unlock(&clp->cl_lock);
 	complete(&args->started);
-	nfs_delegation_claim_opens(inode);
+	nfs_delegation_claim_opens(inode, args->stateid);
 	up_write(&nfsi->rwsem);
 	up_read(&clp->cl_sem);
 	nfs_msync_inode(inode);
@@ -371,14 +409,14 @@ struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs
 {
 	struct nfs_delegation *delegation;
 	struct inode *res = NULL;
-	spin_lock(&clp->cl_lock);
-	list_for_each_entry(delegation, &clp->cl_delegations, super_list) {
+	rcu_read_lock();
+	list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
 		if (nfs_compare_fh(fhandle, &NFS_I(delegation->inode)->fh) == 0) {
 			res = igrab(delegation->inode);
 			break;
 		}
 	}
-	spin_unlock(&clp->cl_lock);
+	rcu_read_unlock();
 	return res;
 }
 
@@ -388,10 +426,10 @@ struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs
 void nfs_delegation_mark_reclaim(struct nfs_client *clp)
 {
 	struct nfs_delegation *delegation;
-	spin_lock(&clp->cl_lock);
-	list_for_each_entry(delegation, &clp->cl_delegations, super_list)
+	rcu_read_lock();
+	list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list)
 		delegation->flags |= NFS_DELEGATION_NEED_RECLAIM;
-	spin_unlock(&clp->cl_lock);
+	rcu_read_unlock();
 }
 
 /*
@@ -399,39 +437,35 @@ void nfs_delegation_mark_reclaim(struct nfs_client *clp)
  */
 void nfs_delegation_reap_unclaimed(struct nfs_client *clp)
 {
-	struct nfs_delegation *delegation, *n;
-	LIST_HEAD(head);
-	spin_lock(&clp->cl_lock);
-	list_for_each_entry_safe(delegation, n, &clp->cl_delegations, super_list) {
+	struct nfs_delegation *delegation;
+restart:
+	rcu_read_lock();
+	list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) {
 		if ((delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0)
 			continue;
-		list_move(&delegation->super_list, &head);
-		NFS_I(delegation->inode)->delegation = NULL;
-		NFS_I(delegation->inode)->delegation_state = 0;
-	}
-	spin_unlock(&clp->cl_lock);
-	while(!list_empty(&head)) {
-		delegation = list_entry(head.next, struct nfs_delegation, super_list);
-		list_del(&delegation->super_list);
-		nfs_free_delegation(delegation);
+		spin_lock(&clp->cl_lock);
+		delegation = nfs_detach_delegation_locked(NFS_I(delegation->inode), NULL);
+		spin_unlock(&clp->cl_lock);
+		rcu_read_unlock();
+		if (delegation != NULL)
+			call_rcu(&delegation->rcu, nfs_free_delegation_callback);
+		goto restart;
 	}
+	rcu_read_unlock();
 }
 
 int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode)
 {
-	struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
 	struct nfs_inode *nfsi = NFS_I(inode);
 	struct nfs_delegation *delegation;
-	int res = 0;
+	int ret = 0;
 
-	if (nfsi->delegation_state == 0)
-		return 0;
-	spin_lock(&clp->cl_lock);
-	delegation = nfsi->delegation;
+	rcu_read_lock();
+	delegation = rcu_dereference(nfsi->delegation);
 	if (delegation != NULL) {
 		memcpy(dst->data, delegation->stateid.data, sizeof(dst->data));
-		res = 1;
+		ret = 1;
 	}
-	spin_unlock(&clp->cl_lock);
-	return res;
+	rcu_read_unlock();
+	return ret;
 }
diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h
index 2cfd4b2..5874ce7 100644
--- a/fs/nfs/delegation.h
+++ b/fs/nfs/delegation.h
@@ -22,11 +22,12 @@ struct nfs_delegation {
 	long flags;
 	loff_t maxsize;
 	__u64 change_attr;
+	struct rcu_head rcu;
 };
 
 int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
 void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res);
-int __nfs_inode_return_delegation(struct inode *inode);
+int nfs_inode_return_delegation(struct inode *inode);
 int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid);
 
 struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle);
@@ -39,27 +40,24 @@ void nfs_delegation_reap_unclaimed(struct nfs_client *clp);
 
 /* NFSv4 delegation-related procedures */
 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid);
-int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state);
+int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid);
 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl);
 int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode);
 
 static inline int nfs_have_delegation(struct inode *inode, int flags)
 {
+	struct nfs_delegation *delegation;
+	int ret = 0;
+
 	flags &= FMODE_READ|FMODE_WRITE;
-	smp_rmb();
-	if ((NFS_I(inode)->delegation_state & flags) == flags)
-		return 1;
-	return 0;
+	rcu_read_lock();
+	delegation = rcu_dereference(NFS_I(inode)->delegation);
+	if (delegation != NULL && (delegation->type & flags) == flags)
+		ret = 1;
+	rcu_read_unlock();
+	return ret;
 }
 
-static inline int nfs_inode_return_delegation(struct inode *inode)
-{
-	int err = 0;
-
-	if (NFS_I(inode)->delegation != NULL)
-		err = __nfs_inode_return_delegation(inode);
-	return err;
-}
 #else
 static inline int nfs_have_delegation(struct inode *inode, int flags)
 {
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index c27258b..322141f 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -897,14 +897,13 @@ int nfs_is_exclusive_create(struct inode *dir, struct nameidata *nd)
 	return (nd->intent.open.flags & O_EXCL) != 0;
 }
 
-static inline int nfs_reval_fsid(struct vfsmount *mnt, struct inode *dir,
-				 struct nfs_fh *fh, struct nfs_fattr *fattr)
+static inline int nfs_reval_fsid(struct inode *dir, const struct nfs_fattr *fattr)
 {
 	struct nfs_server *server = NFS_SERVER(dir);
 
 	if (!nfs_fsid_equal(&server->fsid, &fattr->fsid))
-		/* Revalidate fsid on root dir */
-		return __nfs_revalidate_inode(server, mnt->mnt_root->d_inode);
+		/* Revalidate fsid using the parent directory */
+		return __nfs_revalidate_inode(server, dir);
 	return 0;
 }
 
@@ -946,7 +945,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
 		res = ERR_PTR(error);
 		goto out_unlock;
 	}
-	error = nfs_reval_fsid(nd->mnt, dir, &fhandle, &fattr);
+	error = nfs_reval_fsid(dir, &fattr);
 	if (error < 0) {
 		res = ERR_PTR(error);
 		goto out_unlock;
@@ -1244,7 +1243,7 @@ static int nfs_create(struct inode *dir, struct dentry *dentry, int mode,
 	attr.ia_mode = mode;
 	attr.ia_valid = ATTR_MODE;
 
-	if (nd && (nd->flags & LOOKUP_CREATE))
+	if ((nd->flags & LOOKUP_CREATE) != 0)
 		open_flags = nd->intent.open.flags;
 
 	lock_kernel();
@@ -1535,7 +1534,7 @@ static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *sym
 
 	lock_kernel();
 
-	page = alloc_page(GFP_KERNEL);
+	page = alloc_page(GFP_HIGHUSER);
 	if (!page) {
 		unlock_kernel();
 		return -ENOMEM;
@@ -1744,8 +1743,8 @@ int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask)
 	struct nfs_inode *nfsi;
 	struct nfs_access_entry *cache;
 
-	spin_lock(&nfs_access_lru_lock);
 restart:
+	spin_lock(&nfs_access_lru_lock);
 	list_for_each_entry(nfsi, &nfs_access_lru_list, access_cache_inode_lru) {
 		struct inode *inode;
 
@@ -1770,6 +1769,7 @@ remove_lru_entry:
 			clear_bit(NFS_INO_ACL_LRU_SET, &nfsi->flags);
 		}
 		spin_unlock(&inode->i_lock);
+		spin_unlock(&nfs_access_lru_lock);
 		iput(inode);
 		goto restart;
 	}
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 00eee87..a5c82b6 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -266,7 +266,7 @@ static const struct rpc_call_ops nfs_read_direct_ops = {
 static ssize_t nfs_direct_read_schedule(struct nfs_direct_req *dreq, unsigned long user_addr, size_t count, loff_t pos)
 {
 	struct nfs_open_context *ctx = dreq->ctx;
-	struct inode *inode = ctx->dentry->d_inode;
+	struct inode *inode = ctx->path.dentry->d_inode;
 	size_t rsize = NFS_SERVER(inode)->rsize;
 	unsigned int pgbase;
 	int result;
@@ -295,9 +295,14 @@ static ssize_t nfs_direct_read_schedule(struct nfs_direct_req *dreq, unsigned lo
 			break;
 		}
 		if ((unsigned)result < data->npages) {
-			nfs_direct_release_pages(data->pagevec, result);
-			nfs_readdata_release(data);
-			break;
+			bytes = result * PAGE_SIZE;
+			if (bytes <= pgbase) {
+				nfs_direct_release_pages(data->pagevec, result);
+				nfs_readdata_release(data);
+				break;
+			}
+			bytes -= pgbase;
+			data->npages = result;
 		}
 
 		get_dreq(dreq);
@@ -601,7 +606,7 @@ static const struct rpc_call_ops nfs_write_direct_ops = {
 static ssize_t nfs_direct_write_schedule(struct nfs_direct_req *dreq, unsigned long user_addr, size_t count, loff_t pos, int sync)
 {
 	struct nfs_open_context *ctx = dreq->ctx;
-	struct inode *inode = ctx->dentry->d_inode;
+	struct inode *inode = ctx->path.dentry->d_inode;
 	size_t wsize = NFS_SERVER(inode)->wsize;
 	unsigned int pgbase;
 	int result;
@@ -630,9 +635,14 @@ static ssize_t nfs_direct_write_schedule(struct nfs_direct_req *dreq, unsigned l
 			break;
 		}
 		if ((unsigned)result < data->npages) {
-			nfs_direct_release_pages(data->pagevec, result);
-			nfs_writedata_release(data);
-			break;
+			bytes = result * PAGE_SIZE;
+			if (bytes <= pgbase) {
+				nfs_direct_release_pages(data->pagevec, result);
+				nfs_writedata_release(data);
+				break;
+			}
+			bytes -= pgbase;
+			data->npages = result;
 		}
 
 		get_dreq(dreq);
@@ -763,10 +773,8 @@ ssize_t nfs_file_direct_read(struct kiocb *iocb, const struct iovec *iov,
 		(unsigned long) count, (long long) pos);
 
 	if (nr_segs != 1)
-		return -EINVAL;
-
-	if (count < 0)
 		goto out;
+
 	retval = -EFAULT;
 	if (!access_ok(VERIFY_WRITE, buf, count))
 		goto out;
@@ -814,7 +822,7 @@ out:
 ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
 				unsigned long nr_segs, loff_t pos)
 {
-	ssize_t retval;
+	ssize_t retval = -EINVAL;
 	struct file *file = iocb->ki_filp;
 	struct address_space *mapping = file->f_mapping;
 	/* XXX: temporary */
@@ -827,7 +835,7 @@ ssize_t nfs_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
 		(unsigned long) count, (long long) pos);
 
 	if (nr_segs != 1)
-		return -EINVAL;
+		goto out;
 
 	retval = generic_write_checks(file, &pos, &count, 0);
 	if (retval)
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 9eb8eb4..8689b73 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -41,7 +41,9 @@ static int nfs_file_open(struct inode *, struct file *);
 static int nfs_file_release(struct inode *, struct file *);
 static loff_t nfs_file_llseek(struct file *file, loff_t offset, int origin);
 static int  nfs_file_mmap(struct file *, struct vm_area_struct *);
-static ssize_t nfs_file_sendfile(struct file *, loff_t *, size_t, read_actor_t, void *);
+static ssize_t nfs_file_splice_read(struct file *filp, loff_t *ppos,
+					struct pipe_inode_info *pipe,
+					size_t count, unsigned int flags);
 static ssize_t nfs_file_read(struct kiocb *, const struct iovec *iov,
 				unsigned long nr_segs, loff_t pos);
 static ssize_t nfs_file_write(struct kiocb *, const struct iovec *iov,
@@ -65,7 +67,7 @@ const struct file_operations nfs_file_operations = {
 	.fsync		= nfs_fsync,
 	.lock		= nfs_lock,
 	.flock		= nfs_flock,
-	.sendfile	= nfs_file_sendfile,
+	.splice_read	= nfs_file_splice_read,
 	.check_flags	= nfs_check_flags,
 };
 
@@ -224,20 +226,21 @@ nfs_file_read(struct kiocb *iocb, const struct iovec *iov,
 }
 
 static ssize_t
-nfs_file_sendfile(struct file *filp, loff_t *ppos, size_t count,
-		read_actor_t actor, void *target)
+nfs_file_splice_read(struct file *filp, loff_t *ppos,
+		     struct pipe_inode_info *pipe, size_t count,
+		     unsigned int flags)
 {
 	struct dentry *dentry = filp->f_path.dentry;
 	struct inode *inode = dentry->d_inode;
 	ssize_t res;
 
-	dfprintk(VFS, "nfs: sendfile(%s/%s, %lu@%Lu)\n",
+	dfprintk(VFS, "nfs: splice_read(%s/%s, %lu@%Lu)\n",
 		dentry->d_parent->d_name.name, dentry->d_name.name,
 		(unsigned long) count, (unsigned long long) *ppos);
 
 	res = nfs_revalidate_mapping(inode, filp->f_mapping);
 	if (!res)
-		res = generic_file_sendfile(filp, ppos, count, actor, target);
+		res = generic_file_splice_read(filp, ppos, pipe, count, flags);
 	return res;
 }
 
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index bd9f5a8..3d9fccf 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -461,14 +461,14 @@ static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, str
 
 	ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
 	if (ctx != NULL) {
-		atomic_set(&ctx->count, 1);
-		ctx->dentry = dget(dentry);
-		ctx->vfsmnt = mntget(mnt);
+		ctx->path.dentry = dget(dentry);
+		ctx->path.mnt = mntget(mnt);
 		ctx->cred = get_rpccred(cred);
 		ctx->state = NULL;
 		ctx->lockowner = current->files;
 		ctx->error = 0;
 		ctx->dir_cookie = 0;
+		kref_init(&ctx->kref);
 	}
 	return ctx;
 }
@@ -476,27 +476,33 @@ static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, str
 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
 {
 	if (ctx != NULL)
-		atomic_inc(&ctx->count);
+		kref_get(&ctx->kref);
 	return ctx;
 }
 
-void put_nfs_open_context(struct nfs_open_context *ctx)
+static void nfs_free_open_context(struct kref *kref)
 {
-	if (atomic_dec_and_test(&ctx->count)) {
-		if (!list_empty(&ctx->list)) {
-			struct inode *inode = ctx->dentry->d_inode;
-			spin_lock(&inode->i_lock);
-			list_del(&ctx->list);
-			spin_unlock(&inode->i_lock);
-		}
-		if (ctx->state != NULL)
-			nfs4_close_state(ctx->state, ctx->mode);
-		if (ctx->cred != NULL)
-			put_rpccred(ctx->cred);
-		dput(ctx->dentry);
-		mntput(ctx->vfsmnt);
-		kfree(ctx);
+	struct nfs_open_context *ctx = container_of(kref,
+			struct nfs_open_context, kref);
+
+	if (!list_empty(&ctx->list)) {
+		struct inode *inode = ctx->path.dentry->d_inode;
+		spin_lock(&inode->i_lock);
+		list_del(&ctx->list);
+		spin_unlock(&inode->i_lock);
 	}
+	if (ctx->state != NULL)
+		nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
+	if (ctx->cred != NULL)
+		put_rpccred(ctx->cred);
+	dput(ctx->path.dentry);
+	mntput(ctx->path.mnt);
+	kfree(ctx);
+}
+
+void put_nfs_open_context(struct nfs_open_context *ctx)
+{
+	kref_put(&ctx->kref, nfs_free_open_context);
 }
 
 /*
@@ -961,8 +967,8 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 		goto out_changed;
 
 	server = NFS_SERVER(inode);
-	/* Update the fsid if and only if this is the root directory */
-	if (inode == inode->i_sb->s_root->d_inode
+	/* Update the fsid? */
+	if (S_ISDIR(inode->i_mode)
 			&& !nfs_fsid_equal(&server->fsid, &fattr->fsid))
 		server->fsid = fattr->fsid;
 
@@ -1066,8 +1072,10 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 		invalid &= ~NFS_INO_INVALID_DATA;
 	if (data_stable)
 		invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME|NFS_INO_REVAL_PAGECACHE);
-	if (!nfs_have_delegation(inode, FMODE_READ))
+	if (!nfs_have_delegation(inode, FMODE_READ) ||
+			(nfsi->cache_validity & NFS_INO_REVAL_FORCED))
 		nfsi->cache_validity |= invalid;
+	nfsi->cache_validity &= ~NFS_INO_REVAL_FORCED;
 
 	return 0;
  out_changed:
@@ -1103,27 +1111,10 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
  */
 void nfs4_clear_inode(struct inode *inode)
 {
-	struct nfs_inode *nfsi = NFS_I(inode);
-
 	/* If we are holding a delegation, return it! */
 	nfs_inode_return_delegation(inode);
 	/* First call standard NFS clear_inode() code */
 	nfs_clear_inode(inode);
-	/* Now clear out any remaining state */
-	while (!list_empty(&nfsi->open_states)) {
-		struct nfs4_state *state;
-		
-		state = list_entry(nfsi->open_states.next,
-				struct nfs4_state,
-				inode_states);
-		dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n",
-				__FUNCTION__,
-				inode->i_sb->s_id,
-				(long long)NFS_FILEID(inode),
-				state);
-		BUG_ON(atomic_read(&state->count) != 1);
-		nfs4_close_state(state, state->state);
-	}
 }
 #endif
 
@@ -1165,15 +1156,11 @@ static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flag
 	struct nfs_inode *nfsi = (struct nfs_inode *) foo;
 
 	inode_init_once(&nfsi->vfs_inode);
-	spin_lock_init(&nfsi->req_lock);
-	INIT_LIST_HEAD(&nfsi->dirty);
-	INIT_LIST_HEAD(&nfsi->commit);
 	INIT_LIST_HEAD(&nfsi->open_files);
 	INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
 	INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
 	INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
 	atomic_set(&nfsi->data_updates, 0);
-	nfsi->ndirty = 0;
 	nfsi->ncommit = 0;
 	nfsi->npages = 0;
 	nfs4_init_once(nfsi);
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index ad2b40d..76cf55d 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -183,9 +183,9 @@ unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
 /*
  * Calculate the number of 512byte blocks used.
  */
-static inline unsigned long nfs_calc_block_size(u64 tsize)
+static inline blkcnt_t nfs_calc_block_size(u64 tsize)
 {
-	loff_t used = (tsize + 511) >> 9;
+	blkcnt_t used = (tsize + 511) >> 9;
 	return (used > ULONG_MAX) ? ULONG_MAX : used;
 }
 
diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c
index ca5a266..8afd9f7 100644
--- a/fs/nfs/mount_clnt.c
+++ b/fs/nfs/mount_clnt.c
@@ -1,7 +1,5 @@
 /*
- * linux/fs/nfs/mount_clnt.c
- *
- * MOUNT client to support NFSroot.
+ * In-kernel MOUNT protocol client
  *
  * Copyright (C) 1997, Olaf Kirch <okir@monad.swb.de>
  */
@@ -18,33 +16,31 @@
 #include <linux/nfs_fs.h>
 
 #ifdef RPC_DEBUG
-# define NFSDBG_FACILITY	NFSDBG_ROOT
+# define NFSDBG_FACILITY	NFSDBG_MOUNT
 #endif
 
-/*
-#define MOUNT_PROGRAM		100005
-#define MOUNT_VERSION		1
-#define MOUNT_MNT		1
-#define MOUNT_UMNT		3
- */
-
-static struct rpc_clnt *	mnt_create(char *, struct sockaddr_in *,
-								int, int);
 static struct rpc_program	mnt_program;
 
 struct mnt_fhstatus {
-	unsigned int		status;
-	struct nfs_fh *		fh;
+	u32 status;
+	struct nfs_fh *fh;
 };
 
-/*
- * Obtain an NFS file handle for the given host and path
+/**
+ * nfs_mount - Obtain an NFS file handle for the given host and path
+ * @addr: pointer to server's address
+ * @len: size of server's address
+ * @hostname: name of server host, or NULL
+ * @path: pointer to string containing export path to mount
+ * @version: mount version to use for this request
+ * @protocol: transport protocol to use for thie request
+ * @fh: pointer to location to place returned file handle
+ *
+ * Uses default timeout parameters specified by underlying transport.
  */
-int
-nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh,
-		int version, int protocol)
+int nfs_mount(struct sockaddr *addr, size_t len, char *hostname, char *path,
+	      int version, int protocol, struct nfs_fh *fh)
 {
-	struct rpc_clnt		*mnt_clnt;
 	struct mnt_fhstatus	result = {
 		.fh		= fh
 	};
@@ -52,16 +48,25 @@ nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh,
 		.rpc_argp	= path,
 		.rpc_resp	= &result,
 	};
-	char			hostname[32];
+	struct rpc_create_args args = {
+		.protocol	= protocol,
+		.address	= addr,
+		.addrsize	= len,
+		.servername	= hostname,
+		.program	= &mnt_program,
+		.version	= version,
+		.authflavor	= RPC_AUTH_UNIX,
+		.flags		= RPC_CLNT_CREATE_INTR,
+	};
+	struct rpc_clnt		*mnt_clnt;
 	int			status;
 
-	dprintk("NFS:      nfs_mount(%08x:%s)\n",
-			(unsigned)ntohl(addr->sin_addr.s_addr), path);
+	dprintk("NFS: sending MNT request for %s:%s\n",
+		(hostname ? hostname : "server"), path);
 
-	sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(addr->sin_addr.s_addr));
-	mnt_clnt = mnt_create(hostname, addr, version, protocol);
+	mnt_clnt = rpc_create(&args);
 	if (IS_ERR(mnt_clnt))
-		return PTR_ERR(mnt_clnt);
+		goto out_clnt_err;
 
 	if (version == NFS_MNT3_VERSION)
 		msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC3_MNT];
@@ -69,33 +74,39 @@ nfsroot_mount(struct sockaddr_in *addr, char *path, struct nfs_fh *fh,
 		msg.rpc_proc = &mnt_clnt->cl_procinfo[MNTPROC_MNT];
 
 	status = rpc_call_sync(mnt_clnt, &msg, 0);
-	return status < 0? status : (result.status? -EACCES : 0);
-}
+	rpc_shutdown_client(mnt_clnt);
 
-static struct rpc_clnt *
-mnt_create(char *hostname, struct sockaddr_in *srvaddr, int version,
-		int protocol)
-{
-	struct rpc_create_args args = {
-		.protocol	= protocol,
-		.address	= (struct sockaddr *)srvaddr,
-		.addrsize	= sizeof(*srvaddr),
-		.servername	= hostname,
-		.program	= &mnt_program,
-		.version	= version,
-		.authflavor	= RPC_AUTH_UNIX,
-		.flags		= (RPC_CLNT_CREATE_ONESHOT |
-				   RPC_CLNT_CREATE_INTR),
-	};
+	if (status < 0)
+		goto out_call_err;
+	if (result.status != 0)
+		goto out_mnt_err;
+
+	dprintk("NFS: MNT request succeeded\n");
+	status = 0;
+
+out:
+	return status;
+
+out_clnt_err:
+	status = PTR_ERR(mnt_clnt);
+	dprintk("NFS: failed to create RPC client, status=%d\n", status);
+	goto out;
+
+out_call_err:
+	dprintk("NFS: failed to start MNT request, status=%d\n", status);
+	goto out;
 
-	return rpc_create(&args);
+out_mnt_err:
+	dprintk("NFS: MNT server returned result %d\n", result.status);
+	status = -EACCES;
+	goto out;
 }
 
 /*
  * XDR encode/decode functions for MOUNT
  */
-static int
-xdr_encode_dirpath(struct rpc_rqst *req, __be32 *p, const char *path)
+static int xdr_encode_dirpath(struct rpc_rqst *req, __be32 *p,
+			      const char *path)
 {
 	p = xdr_encode_string(p, path);
 
@@ -103,8 +114,8 @@ xdr_encode_dirpath(struct rpc_rqst *req, __be32 *p, const char *path)
 	return 0;
 }
 
-static int
-xdr_decode_fhstatus(struct rpc_rqst *req, __be32 *p, struct mnt_fhstatus *res)
+static int xdr_decode_fhstatus(struct rpc_rqst *req, __be32 *p,
+			       struct mnt_fhstatus *res)
 {
 	struct nfs_fh *fh = res->fh;
 
@@ -115,8 +126,8 @@ xdr_decode_fhstatus(struct rpc_rqst *req, __be32 *p, struct mnt_fhstatus *res)
 	return 0;
 }
 
-static int
-xdr_decode_fhstatus3(struct rpc_rqst *req, __be32 *p, struct mnt_fhstatus *res)
+static int xdr_decode_fhstatus3(struct rpc_rqst *req, __be32 *p,
+				struct mnt_fhstatus *res)
 {
 	struct nfs_fh *fh = res->fh;
 
@@ -135,53 +146,53 @@ xdr_decode_fhstatus3(struct rpc_rqst *req, __be32 *p, struct mnt_fhstatus *res)
 #define MNT_fhstatus_sz		(1 + 8)
 #define MNT_fhstatus3_sz	(1 + 16)
 
-static struct rpc_procinfo	mnt_procedures[] = {
-[MNTPROC_MNT] = {
-	  .p_proc		= MNTPROC_MNT,
-	  .p_encode		= (kxdrproc_t) xdr_encode_dirpath,	
-	  .p_decode		= (kxdrproc_t) xdr_decode_fhstatus,
-	  .p_arglen		= MNT_dirpath_sz,
-	  .p_replen		= MNT_fhstatus_sz,
-	  .p_statidx		= MNTPROC_MNT,
-	  .p_name		= "MOUNT",
+static struct rpc_procinfo mnt_procedures[] = {
+	[MNTPROC_MNT] = {
+		.p_proc		= MNTPROC_MNT,
+		.p_encode	= (kxdrproc_t) xdr_encode_dirpath,
+		.p_decode	= (kxdrproc_t) xdr_decode_fhstatus,
+		.p_arglen	= MNT_dirpath_sz,
+		.p_replen	= MNT_fhstatus_sz,
+		.p_statidx	= MNTPROC_MNT,
+		.p_name		= "MOUNT",
 	},
 };
 
 static struct rpc_procinfo mnt3_procedures[] = {
-[MOUNTPROC3_MNT] = {
-	  .p_proc		= MOUNTPROC3_MNT,
-	  .p_encode		= (kxdrproc_t) xdr_encode_dirpath,
-	  .p_decode		= (kxdrproc_t) xdr_decode_fhstatus3,
-	  .p_arglen		= MNT_dirpath_sz,
-	  .p_replen		= MNT_fhstatus3_sz,
-	  .p_statidx		= MOUNTPROC3_MNT,
-	  .p_name		= "MOUNT",
+	[MOUNTPROC3_MNT] = {
+		.p_proc		= MOUNTPROC3_MNT,
+		.p_encode	= (kxdrproc_t) xdr_encode_dirpath,
+		.p_decode	= (kxdrproc_t) xdr_decode_fhstatus3,
+		.p_arglen	= MNT_dirpath_sz,
+		.p_replen	= MNT_fhstatus3_sz,
+		.p_statidx	= MOUNTPROC3_MNT,
+		.p_name		= "MOUNT",
 	},
 };
 
 
-static struct rpc_version	mnt_version1 = {
-		.number		= 1,
-		.nrprocs 	= 2,
-		.procs 		= mnt_procedures
+static struct rpc_version mnt_version1 = {
+	.number		= 1,
+	.nrprocs	= 2,
+	.procs		= mnt_procedures,
 };
 
-static struct rpc_version       mnt_version3 = {
-		.number		= 3,
-		.nrprocs	= 2,
-		.procs		= mnt3_procedures
+static struct rpc_version mnt_version3 = {
+	.number		= 3,
+	.nrprocs	= 2,
+	.procs		= mnt3_procedures,
 };
 
-static struct rpc_version *	mnt_version[] = {
+static struct rpc_version *mnt_version[] = {
 	NULL,
 	&mnt_version1,
 	NULL,
 	&mnt_version3,
 };
 
-static struct rpc_stat		mnt_stats;
+static struct rpc_stat mnt_stats;
 
-static struct rpc_program	mnt_program = {
+static struct rpc_program mnt_program = {
 	.name		= "mount",
 	.number		= NFS_MNT_PROGRAM,
 	.nrvers		= ARRAY_SIZE(mnt_version),
diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c
index cd3ca7b..7fcc78f 100644
--- a/fs/nfs/nfs2xdr.c
+++ b/fs/nfs/nfs2xdr.c
@@ -223,7 +223,7 @@ nfs_xdr_diropargs(struct rpc_rqst *req, __be32 *p, struct nfs_diropargs *args)
 static int
 nfs_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
 {
-	struct rpc_auth	*auth = req->rq_task->tk_auth;
+	struct rpc_auth	*auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	unsigned int replen;
 	u32 offset = (u32)args->offset;
 	u32 count = args->count;
@@ -380,7 +380,7 @@ static int
 nfs_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs_readdirargs *args)
 {
 	struct rpc_task	*task = req->rq_task;
-	struct rpc_auth	*auth = task->tk_auth;
+	struct rpc_auth	*auth = task->tk_msg.rpc_cred->cr_auth;
 	unsigned int replen;
 	u32 count = args->count;
 
@@ -541,7 +541,7 @@ nfs_xdr_diropres(struct rpc_rqst *req, __be32 *p, struct nfs_diropok *res)
 static int
 nfs_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs_readlinkargs *args)
 {
-	struct rpc_auth *auth = req->rq_task->tk_auth;
+	struct rpc_auth	*auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	unsigned int replen;
 
 	p = xdr_encode_fhandle(p, args->fh);
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 45268d6..814d886 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -335,9 +335,7 @@ again:
 		 * not sure this buys us anything (and I'd have
 		 * to revamp the NFSv3 XDR code) */
 		status = nfs3_proc_setattr(dentry, &fattr, sattr);
-		if (status == 0)
-			nfs_setattr_update_inode(dentry->d_inode, sattr);
-		nfs_refresh_inode(dentry->d_inode, &fattr);
+		nfs_post_op_update_inode(dentry->d_inode, &fattr);
 		dprintk("NFS reply setattr (post-create): %d\n", status);
 	}
 	if (status != 0)
diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c
index b51df8eb..b4647a2 100644
--- a/fs/nfs/nfs3xdr.c
+++ b/fs/nfs/nfs3xdr.c
@@ -319,7 +319,7 @@ nfs3_xdr_accessargs(struct rpc_rqst *req, __be32 *p, struct nfs3_accessargs *arg
 static int
 nfs3_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
 {
-	struct rpc_auth	*auth = req->rq_task->tk_auth;
+	struct rpc_auth	*auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	unsigned int replen;
 	u32 count = args->count;
 
@@ -458,7 +458,7 @@ nfs3_xdr_linkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_linkargs *args)
 static int
 nfs3_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirargs *args)
 {
-	struct rpc_auth	*auth = req->rq_task->tk_auth;
+	struct rpc_auth	*auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	unsigned int replen;
 	u32 count = args->count;
 
@@ -643,7 +643,7 @@ static int
 nfs3_xdr_getaclargs(struct rpc_rqst *req, __be32 *p,
 		    struct nfs3_getaclargs *args)
 {
-	struct rpc_auth *auth = req->rq_task->tk_auth;
+	struct rpc_auth	*auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	unsigned int replen;
 
 	p = xdr_encode_fhandle(p, args->fh);
@@ -773,7 +773,7 @@ nfs3_xdr_accessres(struct rpc_rqst *req, __be32 *p, struct nfs3_accessres *res)
 static int
 nfs3_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readlinkargs *args)
 {
-	struct rpc_auth *auth = req->rq_task->tk_auth;
+	struct rpc_auth	*auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	unsigned int replen;
 
 	p = xdr_encode_fhandle(p, args->fh);
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index cf3a17e..6c028e7 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -70,19 +70,26 @@ static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status
 		seqid->flags |= NFS_SEQID_CONFIRMED;
 }
 
+struct nfs_unique_id {
+	struct rb_node rb_node;
+	__u64 id;
+};
+
 /*
  * NFS4 state_owners and lock_owners are simply labels for ordered
  * sequences of RPC calls. Their sole purpose is to provide once-only
  * semantics by allowing the server to identify replayed requests.
  */
 struct nfs4_state_owner {
-	spinlock_t	     so_lock;
-	struct list_head     so_list;	 /* per-clientid list of state_owners */
+	struct nfs_unique_id so_owner_id;
 	struct nfs_client    *so_client;
-	u32                  so_id;      /* 32-bit identifier, unique */
-	atomic_t	     so_count;
+	struct nfs_server    *so_server;
+	struct rb_node	     so_client_node;
 
 	struct rpc_cred	     *so_cred;	 /* Associated cred */
+
+	spinlock_t	     so_lock;
+	atomic_t	     so_count;
 	struct list_head     so_states;
 	struct list_head     so_delegations;
 	struct nfs_seqid_counter so_seqid;
@@ -108,7 +115,7 @@ struct nfs4_lock_state {
 #define NFS_LOCK_INITIALIZED 1
 	int			ls_flags;
 	struct nfs_seqid_counter	ls_seqid;
-	u32			ls_id;
+	struct nfs_unique_id	ls_id;
 	nfs4_stateid		ls_stateid;
 	atomic_t		ls_count;
 };
@@ -116,7 +123,10 @@ struct nfs4_lock_state {
 /* bits for nfs4_state->flags */
 enum {
 	LK_STATE_IN_USE,
-	NFS_DELEGATED_STATE,
+	NFS_DELEGATED_STATE,		/* Current stateid is delegation */
+	NFS_O_RDONLY_STATE,		/* OPEN stateid has read-only state */
+	NFS_O_WRONLY_STATE,		/* OPEN stateid has write-only state */
+	NFS_O_RDWR_STATE,		/* OPEN stateid has read/write state */
 };
 
 struct nfs4_state {
@@ -130,11 +140,14 @@ struct nfs4_state {
 	unsigned long flags;		/* Do we hold any locks? */
 	spinlock_t state_lock;		/* Protects the lock_states list */
 
-	nfs4_stateid stateid;
+	seqlock_t seqlock;		/* Protects the stateid/open_stateid */
+	nfs4_stateid stateid;		/* Current stateid: may be delegation */
+	nfs4_stateid open_stateid;	/* OPEN stateid */
 
-	unsigned int n_rdonly;
-	unsigned int n_wronly;
-	unsigned int n_rdwr;
+	/* The following 3 fields are protected by owner->so_lock */
+	unsigned int n_rdonly;		/* Number of read-only references */
+	unsigned int n_wronly;		/* Number of write-only references */
+	unsigned int n_rdwr;		/* Number of read/write references */
 	int state;			/* State on the server (R,W, or RW) */
 	atomic_t count;
 };
@@ -165,7 +178,7 @@ extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struc
 extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct rpc_cred *);
 extern int nfs4_proc_async_renew(struct nfs_client *, struct rpc_cred *);
 extern int nfs4_proc_renew(struct nfs_client *, struct rpc_cred *);
-extern int nfs4_do_close(struct inode *inode, struct nfs4_state *state);
+extern int nfs4_do_close(struct path *path, struct nfs4_state *state);
 extern struct dentry *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
 extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *);
 extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
@@ -189,14 +202,13 @@ extern void nfs4_renew_state(struct work_struct *);
 
 /* nfs4state.c */
 struct rpc_cred *nfs4_get_renew_cred(struct nfs_client *clp);
-extern u32 nfs4_alloc_lockowner_id(struct nfs_client *);
 
 extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *);
 extern void nfs4_put_state_owner(struct nfs4_state_owner *);
 extern void nfs4_drop_state_owner(struct nfs4_state_owner *);
 extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
 extern void nfs4_put_open_state(struct nfs4_state *);
-extern void nfs4_close_state(struct nfs4_state *, mode_t);
+extern void nfs4_close_state(struct path *, struct nfs4_state *, mode_t);
 extern void nfs4_state_set_mode_locked(struct nfs4_state *, mode_t);
 extern void nfs4_schedule_state_recovery(struct nfs_client *);
 extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
@@ -222,7 +234,7 @@ extern struct svc_version nfs4_callback_version1;
 
 #else
 
-#define nfs4_close_state(a, b) do { } while (0)
+#define nfs4_close_state(a, b, c) do { } while (0)
 
 #endif /* CONFIG_NFS_V4 */
 #endif /* __LINUX_FS_NFS_NFS4_FS.H */
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 648e0ac..fee2da8 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -65,6 +65,7 @@ static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *)
 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
+static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags);
 
 /* Prevent leaks of NFSv4 errors into userland */
 int nfs4_map_errors(int err)
@@ -214,27 +215,39 @@ static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
 }
 
 struct nfs4_opendata {
-	atomic_t count;
+	struct kref kref;
 	struct nfs_openargs o_arg;
 	struct nfs_openres o_res;
 	struct nfs_open_confirmargs c_arg;
 	struct nfs_open_confirmres c_res;
 	struct nfs_fattr f_attr;
 	struct nfs_fattr dir_attr;
-	struct dentry *dentry;
+	struct path path;
 	struct dentry *dir;
 	struct nfs4_state_owner *owner;
+	struct nfs4_state *state;
 	struct iattr attrs;
 	unsigned long timestamp;
+	unsigned int rpc_done : 1;
 	int rpc_status;
 	int cancelled;
 };
 
-static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
+
+static void nfs4_init_opendata_res(struct nfs4_opendata *p)
+{
+	p->o_res.f_attr = &p->f_attr;
+	p->o_res.dir_attr = &p->dir_attr;
+	p->o_res.server = p->o_arg.server;
+	nfs_fattr_init(&p->f_attr);
+	nfs_fattr_init(&p->dir_attr);
+}
+
+static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
 		struct nfs4_state_owner *sp, int flags,
 		const struct iattr *attrs)
 {
-	struct dentry *parent = dget_parent(dentry);
+	struct dentry *parent = dget_parent(path->dentry);
 	struct inode *dir = parent->d_inode;
 	struct nfs_server *server = NFS_SERVER(dir);
 	struct nfs4_opendata *p;
@@ -245,24 +258,19 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
 	p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
 	if (p->o_arg.seqid == NULL)
 		goto err_free;
-	atomic_set(&p->count, 1);
-	p->dentry = dget(dentry);
+	p->path.mnt = mntget(path->mnt);
+	p->path.dentry = dget(path->dentry);
 	p->dir = parent;
 	p->owner = sp;
 	atomic_inc(&sp->so_count);
 	p->o_arg.fh = NFS_FH(dir);
 	p->o_arg.open_flags = flags,
 	p->o_arg.clientid = server->nfs_client->cl_clientid;
-	p->o_arg.id = sp->so_id;
-	p->o_arg.name = &dentry->d_name;
+	p->o_arg.id = sp->so_owner_id.id;
+	p->o_arg.name = &p->path.dentry->d_name;
 	p->o_arg.server = server;
 	p->o_arg.bitmask = server->attr_bitmask;
 	p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
-	p->o_res.f_attr = &p->f_attr;
-	p->o_res.dir_attr = &p->dir_attr;
-	p->o_res.server = server;
-	nfs_fattr_init(&p->f_attr);
-	nfs_fattr_init(&p->dir_attr);
 	if (flags & O_EXCL) {
 		u32 *s = (u32 *) p->o_arg.u.verifier.data;
 		s[0] = jiffies;
@@ -274,6 +282,8 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
 	p->c_arg.fh = &p->o_res.fh;
 	p->c_arg.stateid = &p->o_res.stateid;
 	p->c_arg.seqid = p->o_arg.seqid;
+	nfs4_init_opendata_res(p);
+	kref_init(&p->kref);
 	return p;
 err_free:
 	kfree(p);
@@ -282,27 +292,25 @@ err:
 	return NULL;
 }
 
-static void nfs4_opendata_free(struct nfs4_opendata *p)
+static void nfs4_opendata_free(struct kref *kref)
 {
-	if (p != NULL && atomic_dec_and_test(&p->count)) {
-		nfs_free_seqid(p->o_arg.seqid);
-		nfs4_put_state_owner(p->owner);
-		dput(p->dir);
-		dput(p->dentry);
-		kfree(p);
-	}
+	struct nfs4_opendata *p = container_of(kref,
+			struct nfs4_opendata, kref);
+
+	nfs_free_seqid(p->o_arg.seqid);
+	if (p->state != NULL)
+		nfs4_put_open_state(p->state);
+	nfs4_put_state_owner(p->owner);
+	dput(p->dir);
+	dput(p->path.dentry);
+	mntput(p->path.mnt);
+	kfree(p);
 }
 
-/* Helper for asynchronous RPC calls */
-static int nfs4_call_async(struct rpc_clnt *clnt,
-		const struct rpc_call_ops *tk_ops, void *calldata)
+static void nfs4_opendata_put(struct nfs4_opendata *p)
 {
-	struct rpc_task *task;
-
-	if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
-		return -ENOMEM;
-	rpc_execute(task);
-	return 0;
+	if (p != NULL)
+		kref_put(&p->kref, nfs4_opendata_free);
 }
 
 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
@@ -316,7 +324,34 @@ static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
 	return ret;
 }
 
-static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
+static int can_open_cached(struct nfs4_state *state, int mode)
+{
+	int ret = 0;
+	switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
+		case FMODE_READ:
+			ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
+			ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
+			break;
+		case FMODE_WRITE:
+			ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
+			ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
+			break;
+		case FMODE_READ|FMODE_WRITE:
+			ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
+	}
+	return ret;
+}
+
+static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
+{
+	if ((delegation->type & open_flags) != open_flags)
+		return 0;
+	if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
+		return 0;
+	return 1;
+}
+
+static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
 {
 	switch (open_flags) {
 		case FMODE_WRITE:
@@ -328,41 +363,176 @@ static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_
 		case FMODE_READ|FMODE_WRITE:
 			state->n_rdwr++;
 	}
+	nfs4_state_set_mode_locked(state, state->state | open_flags);
 }
 
-static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
+static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
 {
-	struct inode *inode = state->inode;
+	if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
+		memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
+	memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
+	switch (open_flags) {
+		case FMODE_READ:
+			set_bit(NFS_O_RDONLY_STATE, &state->flags);
+			break;
+		case FMODE_WRITE:
+			set_bit(NFS_O_WRONLY_STATE, &state->flags);
+			break;
+		case FMODE_READ|FMODE_WRITE:
+			set_bit(NFS_O_RDWR_STATE, &state->flags);
+	}
+}
+
+static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
+{
+	write_seqlock(&state->seqlock);
+	nfs_set_open_stateid_locked(state, stateid, open_flags);
+	write_sequnlock(&state->seqlock);
+}
 
+static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
+{
 	open_flags &= (FMODE_READ|FMODE_WRITE);
-	/* Protect against nfs4_find_state_byowner() */
+	/*
+	 * Protect the call to nfs4_state_set_mode_locked and
+	 * serialise the stateid update
+	 */
+	write_seqlock(&state->seqlock);
+	if (deleg_stateid != NULL) {
+		memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
+		set_bit(NFS_DELEGATED_STATE, &state->flags);
+	}
+	if (open_stateid != NULL)
+		nfs_set_open_stateid_locked(state, open_stateid, open_flags);
+	write_sequnlock(&state->seqlock);
 	spin_lock(&state->owner->so_lock);
-	spin_lock(&inode->i_lock);
-	memcpy(&state->stateid, stateid, sizeof(state->stateid));
 	update_open_stateflags(state, open_flags);
-	nfs4_state_set_mode_locked(state, state->state | open_flags);
-	spin_unlock(&inode->i_lock);
 	spin_unlock(&state->owner->so_lock);
 }
 
+static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
+{
+	struct nfs_delegation *delegation;
+
+	rcu_read_lock();
+	delegation = rcu_dereference(NFS_I(inode)->delegation);
+	if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
+		rcu_read_unlock();
+		return;
+	}
+	rcu_read_unlock();
+	nfs_inode_return_delegation(inode);
+}
+
+static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
+{
+	struct nfs4_state *state = opendata->state;
+	struct nfs_inode *nfsi = NFS_I(state->inode);
+	struct nfs_delegation *delegation;
+	int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
+	nfs4_stateid stateid;
+	int ret = -EAGAIN;
+
+	rcu_read_lock();
+	delegation = rcu_dereference(nfsi->delegation);
+	for (;;) {
+		if (can_open_cached(state, open_mode)) {
+			spin_lock(&state->owner->so_lock);
+			if (can_open_cached(state, open_mode)) {
+				update_open_stateflags(state, open_mode);
+				spin_unlock(&state->owner->so_lock);
+				rcu_read_unlock();
+				goto out_return_state;
+			}
+			spin_unlock(&state->owner->so_lock);
+		}
+		if (delegation == NULL)
+			break;
+		if (!can_open_delegated(delegation, open_mode))
+			break;
+		/* Save the delegation */
+		memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
+		rcu_read_unlock();
+		lock_kernel();
+		ret = _nfs4_do_access(state->inode, state->owner->so_cred, open_mode);
+		unlock_kernel();
+		if (ret != 0)
+			goto out;
+		ret = -EAGAIN;
+		rcu_read_lock();
+		delegation = rcu_dereference(nfsi->delegation);
+		/* If no delegation, try a cached open */
+		if (delegation == NULL)
+			continue;
+		/* Is the delegation still valid? */
+		if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
+			continue;
+		rcu_read_unlock();
+		update_open_stateid(state, NULL, &stateid, open_mode);
+		goto out_return_state;
+	}
+	rcu_read_unlock();
+out:
+	return ERR_PTR(ret);
+out_return_state:
+	atomic_inc(&state->count);
+	return state;
+}
+
 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
 {
 	struct inode *inode;
 	struct nfs4_state *state = NULL;
+	struct nfs_delegation *delegation;
+	nfs4_stateid *deleg_stateid = NULL;
+	int ret;
 
-	if (!(data->f_attr.valid & NFS_ATTR_FATTR))
+	if (!data->rpc_done) {
+		state = nfs4_try_open_cached(data);
 		goto out;
+	}
+
+	ret = -EAGAIN;
+	if (!(data->f_attr.valid & NFS_ATTR_FATTR))
+		goto err;
 	inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
+	ret = PTR_ERR(inode);
 	if (IS_ERR(inode))
-		goto out;
+		goto err;
+	ret = -ENOMEM;
 	state = nfs4_get_open_state(inode, data->owner);
 	if (state == NULL)
-		goto put_inode;
-	update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
-put_inode:
+		goto err_put_inode;
+	if (data->o_res.delegation_type != 0) {
+		int delegation_flags = 0;
+
+		rcu_read_lock();
+		delegation = rcu_dereference(NFS_I(inode)->delegation);
+		if (delegation)
+			delegation_flags = delegation->flags;
+		rcu_read_unlock();
+		if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
+			nfs_inode_set_delegation(state->inode,
+					data->owner->so_cred,
+					&data->o_res);
+		else
+			nfs_inode_reclaim_delegation(state->inode,
+					data->owner->so_cred,
+					&data->o_res);
+	}
+	rcu_read_lock();
+	delegation = rcu_dereference(NFS_I(inode)->delegation);
+	if (delegation != NULL)
+		deleg_stateid = &delegation->stateid;
+	update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
+	rcu_read_unlock();
 	iput(inode);
 out:
 	return state;
+err_put_inode:
+	iput(inode);
+err:
+	return ERR_PTR(ret);
 }
 
 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
@@ -382,79 +552,66 @@ static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *
 	return ERR_PTR(-ENOENT);
 }
 
-static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
+static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
 {
+	struct nfs4_state *newstate;
 	int ret;
 
 	opendata->o_arg.open_flags = openflags;
+	memset(&opendata->o_res, 0, sizeof(opendata->o_res));
+	memset(&opendata->c_res, 0, sizeof(opendata->c_res));
+	nfs4_init_opendata_res(opendata);
 	ret = _nfs4_proc_open(opendata);
 	if (ret != 0)
 		return ret; 
-	memcpy(stateid->data, opendata->o_res.stateid.data,
-			sizeof(stateid->data));
+	newstate = nfs4_opendata_to_nfs4_state(opendata);
+	if (IS_ERR(newstate))
+		return PTR_ERR(newstate);
+	nfs4_close_state(&opendata->path, newstate, openflags);
+	*res = newstate;
 	return 0;
 }
 
 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
 {
-	nfs4_stateid stateid;
 	struct nfs4_state *newstate;
-	int mode = 0;
-	int delegation = 0;
 	int ret;
 
 	/* memory barrier prior to reading state->n_* */
+	clear_bit(NFS_DELEGATED_STATE, &state->flags);
 	smp_rmb();
 	if (state->n_rdwr != 0) {
-		ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
+		ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
 		if (ret != 0)
 			return ret;
-		mode |= FMODE_READ|FMODE_WRITE;
-		if (opendata->o_res.delegation_type != 0)
-			delegation = opendata->o_res.delegation_type;
-		smp_rmb();
+		if (newstate != state)
+			return -ESTALE;
 	}
 	if (state->n_wronly != 0) {
-		ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
+		ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
 		if (ret != 0)
 			return ret;
-		mode |= FMODE_WRITE;
-		if (opendata->o_res.delegation_type != 0)
-			delegation = opendata->o_res.delegation_type;
-		smp_rmb();
+		if (newstate != state)
+			return -ESTALE;
 	}
 	if (state->n_rdonly != 0) {
-		ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
+		ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
 		if (ret != 0)
 			return ret;
-		mode |= FMODE_READ;
+		if (newstate != state)
+			return -ESTALE;
 	}
-	clear_bit(NFS_DELEGATED_STATE, &state->flags);
-	if (mode == 0)
-		return 0;
-	if (opendata->o_res.delegation_type == 0)
-		opendata->o_res.delegation_type = delegation;
-	opendata->o_arg.open_flags |= mode;
-	newstate = nfs4_opendata_to_nfs4_state(opendata);
-	if (newstate != NULL) {
-		if (opendata->o_res.delegation_type != 0) {
-			struct nfs_inode *nfsi = NFS_I(newstate->inode);
-			int delegation_flags = 0;
-			if (nfsi->delegation)
-				delegation_flags = nfsi->delegation->flags;
-			if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
-				nfs_inode_set_delegation(newstate->inode,
-						opendata->owner->so_cred,
-						&opendata->o_res);
-			else
-				nfs_inode_reclaim_delegation(newstate->inode,
-						opendata->owner->so_cred,
-						&opendata->o_res);
-		}
-		nfs4_close_state(newstate, opendata->o_arg.open_flags);
+	/*
+	 * We may have performed cached opens for all three recoveries.
+	 * Check if we need to update the current stateid.
+	 */
+	if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
+	    memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
+		write_seqlock(&state->seqlock);
+		if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
+			memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
+		write_sequnlock(&state->seqlock);
 	}
-	if (newstate != state)
-		return -ESTALE;
 	return 0;
 }
 
@@ -462,41 +619,37 @@ static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *
  * OPEN_RECLAIM:
  * 	reclaim state on the server after a reboot.
  */
-static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
+static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
 {
-	struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
+	struct nfs_delegation *delegation;
 	struct nfs4_opendata *opendata;
 	int delegation_type = 0;
 	int status;
 
-	if (delegation != NULL) {
-		if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
-			memcpy(&state->stateid, &delegation->stateid,
-					sizeof(state->stateid));
-			set_bit(NFS_DELEGATED_STATE, &state->flags);
-			return 0;
-		}
-		delegation_type = delegation->type;
-	}
-	opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
+	opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
 	if (opendata == NULL)
 		return -ENOMEM;
 	opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
 	opendata->o_arg.fh = NFS_FH(state->inode);
 	nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
+	rcu_read_lock();
+	delegation = rcu_dereference(NFS_I(state->inode)->delegation);
+	if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
+		delegation_type = delegation->flags;
+	rcu_read_unlock();
 	opendata->o_arg.u.delegation_type = delegation_type;
 	status = nfs4_open_recover(opendata, state);
-	nfs4_opendata_free(opendata);
+	nfs4_opendata_put(opendata);
 	return status;
 }
 
-static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
+static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
 {
 	struct nfs_server *server = NFS_SERVER(state->inode);
 	struct nfs4_exception exception = { };
 	int err;
 	do {
-		err = _nfs4_do_open_reclaim(sp, state, dentry);
+		err = _nfs4_do_open_reclaim(ctx, state);
 		if (err != -NFS4ERR_DELAY)
 			break;
 		nfs4_handle_exception(server, err, &exception);
@@ -512,37 +665,35 @@ static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *sta
 	ctx = nfs4_state_find_open_context(state);
 	if (IS_ERR(ctx))
 		return PTR_ERR(ctx);
-	ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
+	ret = nfs4_do_open_reclaim(ctx, state);
 	put_nfs_open_context(ctx);
 	return ret;
 }
 
-static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
+static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
 {
 	struct nfs4_state_owner  *sp  = state->owner;
 	struct nfs4_opendata *opendata;
 	int ret;
 
-	if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
-		return 0;
-	opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
+	opendata = nfs4_opendata_alloc(&ctx->path, sp, 0, NULL);
 	if (opendata == NULL)
 		return -ENOMEM;
 	opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
-	memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
+	memcpy(opendata->o_arg.u.delegation.data, stateid->data,
 			sizeof(opendata->o_arg.u.delegation.data));
 	ret = nfs4_open_recover(opendata, state);
-	nfs4_opendata_free(opendata);
+	nfs4_opendata_put(opendata);
 	return ret;
 }
 
-int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
+int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
 {
 	struct nfs4_exception exception = { };
-	struct nfs_server *server = NFS_SERVER(dentry->d_inode);
+	struct nfs_server *server = NFS_SERVER(state->inode);
 	int err;
 	do {
-		err = _nfs4_open_delegation_recall(dentry, state);
+		err = _nfs4_open_delegation_recall(ctx, state, stateid);
 		switch (err) {
 			case 0:
 				return err;
@@ -582,9 +733,10 @@ static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
 		memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
 				sizeof(data->o_res.stateid.data));
 		renew_lease(data->o_res.server, data->timestamp);
+		data->rpc_done = 1;
 	}
-	nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
 	nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
+	nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
 }
 
 static void nfs4_open_confirm_release(void *calldata)
@@ -596,14 +748,14 @@ static void nfs4_open_confirm_release(void *calldata)
 	if (data->cancelled == 0)
 		goto out_free;
 	/* In case of error, no cleanup! */
-	if (data->rpc_status != 0)
+	if (!data->rpc_done)
 		goto out_free;
 	nfs_confirm_seqid(&data->owner->so_seqid, 0);
 	state = nfs4_opendata_to_nfs4_state(data);
-	if (state != NULL)
-		nfs4_close_state(state, data->o_arg.open_flags);
+	if (!IS_ERR(state))
+		nfs4_close_state(&data->path, state, data->o_arg.open_flags);
 out_free:
-	nfs4_opendata_free(data);
+	nfs4_opendata_put(data);
 }
 
 static const struct rpc_call_ops nfs4_open_confirm_ops = {
@@ -621,12 +773,9 @@ static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
 	struct rpc_task *task;
 	int status;
 
-	atomic_inc(&data->count);
-	/*
-	 * If rpc_run_task() ends up calling ->rpc_release(), we
-	 * want to ensure that it takes the 'error' code path.
-	 */
-	data->rpc_status = -ENOMEM;
+	kref_get(&data->kref);
+	data->rpc_done = 0;
+	data->rpc_status = 0;
 	task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
 	if (IS_ERR(task))
 		return PTR_ERR(task);
@@ -653,13 +802,35 @@ static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
 	
 	if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
 		return;
+	/*
+	 * Check if we still need to send an OPEN call, or if we can use
+	 * a delegation instead.
+	 */
+	if (data->state != NULL) {
+		struct nfs_delegation *delegation;
+
+		if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
+			goto out_no_action;
+		rcu_read_lock();
+		delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
+		if (delegation != NULL &&
+		   (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
+			rcu_read_unlock();
+			goto out_no_action;
+		}
+		rcu_read_unlock();
+	}
 	/* Update sequence id. */
-	data->o_arg.id = sp->so_id;
+	data->o_arg.id = sp->so_owner_id.id;
 	data->o_arg.clientid = sp->so_client->cl_clientid;
 	if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
 		msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
 	data->timestamp = jiffies;
 	rpc_call_setup(task, &msg, 0);
+	return;
+out_no_action:
+	task->tk_action = NULL;
+
 }
 
 static void nfs4_open_done(struct rpc_task *task, void *calldata)
@@ -683,8 +854,11 @@ static void nfs4_open_done(struct rpc_task *task, void *calldata)
 				data->rpc_status = -ENOTDIR;
 		}
 		renew_lease(data->o_res.server, data->timestamp);
+		if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
+			nfs_confirm_seqid(&data->owner->so_seqid, 0);
 	}
 	nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
+	data->rpc_done = 1;
 }
 
 static void nfs4_open_release(void *calldata)
@@ -696,17 +870,17 @@ static void nfs4_open_release(void *calldata)
 	if (data->cancelled == 0)
 		goto out_free;
 	/* In case of error, no cleanup! */
-	if (data->rpc_status != 0)
+	if (data->rpc_status != 0 || !data->rpc_done)
 		goto out_free;
 	/* In case we need an open_confirm, no cleanup! */
 	if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
 		goto out_free;
 	nfs_confirm_seqid(&data->owner->so_seqid, 0);
 	state = nfs4_opendata_to_nfs4_state(data);
-	if (state != NULL)
-		nfs4_close_state(state, data->o_arg.open_flags);
+	if (!IS_ERR(state))
+		nfs4_close_state(&data->path, state, data->o_arg.open_flags);
 out_free:
-	nfs4_opendata_free(data);
+	nfs4_opendata_put(data);
 }
 
 static const struct rpc_call_ops nfs4_open_ops = {
@@ -727,12 +901,10 @@ static int _nfs4_proc_open(struct nfs4_opendata *data)
 	struct rpc_task *task;
 	int status;
 
-	atomic_inc(&data->count);
-	/*
-	 * If rpc_run_task() ends up calling ->rpc_release(), we
-	 * want to ensure that it takes the 'error' code path.
-	 */
-	data->rpc_status = -ENOMEM;
+	kref_get(&data->kref);
+	data->rpc_done = 0;
+	data->rpc_status = 0;
+	data->cancelled = 0;
 	task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
 	if (IS_ERR(task))
 		return PTR_ERR(task);
@@ -743,7 +915,7 @@ static int _nfs4_proc_open(struct nfs4_opendata *data)
 	} else
 		status = data->rpc_status;
 	rpc_put_task(task);
-	if (status != 0)
+	if (status != 0 || !data->rpc_done)
 		return status;
 
 	if (o_arg->open_flags & O_CREAT) {
@@ -756,7 +928,6 @@ static int _nfs4_proc_open(struct nfs4_opendata *data)
 		if (status != 0)
 			return status;
 	}
-	nfs_confirm_seqid(&data->owner->so_seqid, 0);
 	if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
 		return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
 	return 0;
@@ -772,6 +943,8 @@ static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openf
 		mask |= MAY_READ;
 	if (openflags & FMODE_WRITE)
 		mask |= MAY_WRITE;
+	if (openflags & FMODE_EXEC)
+		mask |= MAY_EXEC;
 	status = nfs_access_get_cached(inode, cred, &cache);
 	if (status == 0)
 		goto out;
@@ -811,43 +984,32 @@ static int nfs4_recover_expired_lease(struct nfs_server *server)
  * 	reclaim state on the server after a network partition.
  * 	Assumes caller holds the appropriate lock
  */
-static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
+static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
 {
-	struct inode *inode = state->inode;
-	struct nfs_delegation *delegation = NFS_I(inode)->delegation;
 	struct nfs4_opendata *opendata;
-	int openflags = state->state & (FMODE_READ|FMODE_WRITE);
 	int ret;
 
-	if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
-		ret = _nfs4_do_access(inode, sp->so_cred, openflags);
-		if (ret < 0)
-			return ret;
-		memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
-		set_bit(NFS_DELEGATED_STATE, &state->flags);
-		return 0;
-	}
-	opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
+	opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
 	if (opendata == NULL)
 		return -ENOMEM;
 	ret = nfs4_open_recover(opendata, state);
 	if (ret == -ESTALE) {
 		/* Invalidate the state owner so we don't ever use it again */
-		nfs4_drop_state_owner(sp);
-		d_drop(dentry);
+		nfs4_drop_state_owner(state->owner);
+		d_drop(ctx->path.dentry);
 	}
-	nfs4_opendata_free(opendata);
+	nfs4_opendata_put(opendata);
 	return ret;
 }
 
-static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
+static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
 {
-	struct nfs_server *server = NFS_SERVER(dentry->d_inode);
+	struct nfs_server *server = NFS_SERVER(state->inode);
 	struct nfs4_exception exception = { };
 	int err;
 
 	do {
-		err = _nfs4_open_expired(sp, state, dentry);
+		err = _nfs4_open_expired(ctx, state);
 		if (err == -NFS4ERR_DELAY)
 			nfs4_handle_exception(server, err, &exception);
 	} while (exception.retry);
@@ -862,107 +1024,38 @@ static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *sta
 	ctx = nfs4_state_find_open_context(state);
 	if (IS_ERR(ctx))
 		return PTR_ERR(ctx);
-	ret = nfs4_do_open_expired(sp, state, ctx->dentry);
+	ret = nfs4_do_open_expired(ctx, state);
 	put_nfs_open_context(ctx);
 	return ret;
 }
 
 /*
- * Returns a referenced nfs4_state if there is an open delegation on the file
+ * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
+ * fields corresponding to attributes that were used to store the verifier.
+ * Make sure we clobber those fields in the later setattr call
  */
-static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
-{
-	struct nfs_delegation *delegation;
-	struct nfs_server *server = NFS_SERVER(inode);
-	struct nfs_client *clp = server->nfs_client;
-	struct nfs_inode *nfsi = NFS_I(inode);
-	struct nfs4_state_owner *sp = NULL;
-	struct nfs4_state *state = NULL;
-	int open_flags = flags & (FMODE_READ|FMODE_WRITE);
-	int err;
-
-	err = -ENOMEM;
-	if (!(sp = nfs4_get_state_owner(server, cred))) {
-		dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
-		return err;
-	}
-	err = nfs4_recover_expired_lease(server);
-	if (err != 0)
-		goto out_put_state_owner;
-	/* Protect against reboot recovery - NOTE ORDER! */
-	down_read(&clp->cl_sem);
-	/* Protect against delegation recall */
-	down_read(&nfsi->rwsem);
-	delegation = NFS_I(inode)->delegation;
-	err = -ENOENT;
-	if (delegation == NULL || (delegation->type & open_flags) != open_flags)
-		goto out_err;
-	err = -ENOMEM;
-	state = nfs4_get_open_state(inode, sp);
-	if (state == NULL)
-		goto out_err;
-
-	err = -ENOENT;
-	if ((state->state & open_flags) == open_flags) {
-		spin_lock(&inode->i_lock);
-		update_open_stateflags(state, open_flags);
-		spin_unlock(&inode->i_lock);
-		goto out_ok;
-	} else if (state->state != 0)
-		goto out_put_open_state;
-
-	lock_kernel();
-	err = _nfs4_do_access(inode, cred, open_flags);
-	unlock_kernel();
-	if (err != 0)
-		goto out_put_open_state;
-	set_bit(NFS_DELEGATED_STATE, &state->flags);
-	update_open_stateid(state, &delegation->stateid, open_flags);
-out_ok:
-	nfs4_put_state_owner(sp);
-	up_read(&nfsi->rwsem);
-	up_read(&clp->cl_sem);
-	*res = state;
-	return 0;
-out_put_open_state:
-	nfs4_put_open_state(state);
-out_err:
-	up_read(&nfsi->rwsem);
-	up_read(&clp->cl_sem);
-	if (err != -EACCES)
-		nfs_inode_return_delegation(inode);
-out_put_state_owner:
-	nfs4_put_state_owner(sp);
-	return err;
-}
-
-static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
+static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
 {
-	struct nfs4_exception exception = { };
-	struct nfs4_state *res = ERR_PTR(-EIO);
-	int err;
+	if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
+	    !(sattr->ia_valid & ATTR_ATIME_SET))
+		sattr->ia_valid |= ATTR_ATIME;
 
-	do {
-		err = _nfs4_open_delegated(inode, flags, cred, &res);
-		if (err == 0)
-			break;
-		res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
-					err, &exception));
-	} while (exception.retry);
-	return res;
+	if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
+	    !(sattr->ia_valid & ATTR_MTIME_SET))
+		sattr->ia_valid |= ATTR_MTIME;
 }
 
 /*
  * Returns a referenced nfs4_state
  */
-static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
+static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
 {
 	struct nfs4_state_owner  *sp;
 	struct nfs4_state     *state = NULL;
 	struct nfs_server       *server = NFS_SERVER(dir);
 	struct nfs_client *clp = server->nfs_client;
 	struct nfs4_opendata *opendata;
-	int                     status;
+	int status;
 
 	/* Protect against reboot recovery conflicts */
 	status = -ENOMEM;
@@ -973,29 +1066,35 @@ static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, st
 	status = nfs4_recover_expired_lease(server);
 	if (status != 0)
 		goto err_put_state_owner;
+	if (path->dentry->d_inode != NULL)
+		nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
 	down_read(&clp->cl_sem);
 	status = -ENOMEM;
-	opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
+	opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
 	if (opendata == NULL)
 		goto err_release_rwsem;
 
+	if (path->dentry->d_inode != NULL)
+		opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
+
 	status = _nfs4_proc_open(opendata);
 	if (status != 0)
-		goto err_opendata_free;
+		goto err_opendata_put;
+
+	if (opendata->o_arg.open_flags & O_EXCL)
+		nfs4_exclusive_attrset(opendata, sattr);
 
-	status = -ENOMEM;
 	state = nfs4_opendata_to_nfs4_state(opendata);
-	if (state == NULL)
-		goto err_opendata_free;
-	if (opendata->o_res.delegation_type != 0)
-		nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
-	nfs4_opendata_free(opendata);
+	status = PTR_ERR(state);
+	if (IS_ERR(state))
+		goto err_opendata_put;
+	nfs4_opendata_put(opendata);
 	nfs4_put_state_owner(sp);
 	up_read(&clp->cl_sem);
 	*res = state;
 	return 0;
-err_opendata_free:
-	nfs4_opendata_free(opendata);
+err_opendata_put:
+	nfs4_opendata_put(opendata);
 err_release_rwsem:
 	up_read(&clp->cl_sem);
 err_put_state_owner:
@@ -1006,14 +1105,14 @@ out_err:
 }
 
 
-static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
+static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
 {
 	struct nfs4_exception exception = { };
 	struct nfs4_state *res;
 	int status;
 
 	do {
-		status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
+		status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
 		if (status == 0)
 			break;
 		/* NOTE: BAD_SEQID means the server and client disagree about the
@@ -1028,7 +1127,9 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry,
 		 * the user though...
 		 */
 		if (status == -NFS4ERR_BAD_SEQID) {
-			printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
+			printk(KERN_WARNING "NFS: v4 server %s "
+					" returned a bad sequence-id error!\n",
+					NFS_SERVER(dir)->nfs_client->cl_hostname);
 			exception.retry = 1;
 			continue;
 		}
@@ -1042,6 +1143,11 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry,
 			exception.retry = 1;
 			continue;
 		}
+		if (status == -EAGAIN) {
+			/* We must have found a delegation */
+			exception.retry = 1;
+			continue;
+		}
 		res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
 					status, &exception));
 	} while (exception.retry);
@@ -1101,6 +1207,7 @@ static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
 }
 
 struct nfs4_closedata {
+	struct path path;
 	struct inode *inode;
 	struct nfs4_state *state;
 	struct nfs_closeargs arg;
@@ -1117,6 +1224,8 @@ static void nfs4_free_closedata(void *data)
 	nfs4_put_open_state(calldata->state);
 	nfs_free_seqid(calldata->arg.seqid);
 	nfs4_put_state_owner(sp);
+	dput(calldata->path.dentry);
+	mntput(calldata->path.mnt);
 	kfree(calldata);
 }
 
@@ -1134,8 +1243,7 @@ static void nfs4_close_done(struct rpc_task *task, void *data)
 	nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
 	switch (task->tk_status) {
 		case 0:
-			memcpy(&state->stateid, &calldata->res.stateid,
-					sizeof(state->stateid));
+			nfs_set_open_stateid(state, &calldata->res.stateid, calldata->arg.open_flags);
 			renew_lease(server, calldata->timestamp);
 			break;
 		case -NFS4ERR_STALE_STATEID:
@@ -1160,26 +1268,30 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data)
 		.rpc_resp = &calldata->res,
 		.rpc_cred = state->owner->so_cred,
 	};
-	int mode = 0, old_mode;
+	int clear_rd, clear_wr, clear_rdwr;
+	int mode;
 
 	if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
 		return;
-	/* Recalculate the new open mode in case someone reopened the file
-	 * while we were waiting in line to be scheduled.
-	 */
+
+	mode = FMODE_READ|FMODE_WRITE;
+	clear_rd = clear_wr = clear_rdwr = 0;
 	spin_lock(&state->owner->so_lock);
-	spin_lock(&calldata->inode->i_lock);
-	mode = old_mode = state->state;
+	/* Calculate the change in open mode */
 	if (state->n_rdwr == 0) {
-		if (state->n_rdonly == 0)
+		if (state->n_rdonly == 0) {
 			mode &= ~FMODE_READ;
-		if (state->n_wronly == 0)
+			clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
+			clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
+		}
+		if (state->n_wronly == 0) {
 			mode &= ~FMODE_WRITE;
+			clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
+			clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
+		}
 	}
-	nfs4_state_set_mode_locked(state, mode);
-	spin_unlock(&calldata->inode->i_lock);
 	spin_unlock(&state->owner->so_lock);
-	if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
+	if (!clear_rd && !clear_wr && !clear_rdwr) {
 		/* Note: exit _without_ calling nfs4_close_done */
 		task->tk_action = NULL;
 		return;
@@ -1209,19 +1321,21 @@ static const struct rpc_call_ops nfs4_close_ops = {
  *
  * NOTE: Caller must be holding the sp->so_owner semaphore!
  */
-int nfs4_do_close(struct inode *inode, struct nfs4_state *state) 
+int nfs4_do_close(struct path *path, struct nfs4_state *state)
 {
-	struct nfs_server *server = NFS_SERVER(inode);
+	struct nfs_server *server = NFS_SERVER(state->inode);
 	struct nfs4_closedata *calldata;
+	struct nfs4_state_owner *sp = state->owner;
+	struct rpc_task *task;
 	int status = -ENOMEM;
 
 	calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
 	if (calldata == NULL)
 		goto out;
-	calldata->inode = inode;
+	calldata->inode = state->inode;
 	calldata->state = state;
-	calldata->arg.fh = NFS_FH(inode);
-	calldata->arg.stateid = &state->stateid;
+	calldata->arg.fh = NFS_FH(state->inode);
+	calldata->arg.stateid = &state->open_stateid;
 	/* Serialization for the sequence id */
 	calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
 	if (calldata->arg.seqid == NULL)
@@ -1229,36 +1343,55 @@ int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
 	calldata->arg.bitmask = server->attr_bitmask;
 	calldata->res.fattr = &calldata->fattr;
 	calldata->res.server = server;
+	calldata->path.mnt = mntget(path->mnt);
+	calldata->path.dentry = dget(path->dentry);
 
-	status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
-	if (status == 0)
-		goto out;
-
-	nfs_free_seqid(calldata->arg.seqid);
+	task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata);
+	if (IS_ERR(task))
+		return PTR_ERR(task);
+	rpc_put_task(task);
+	return 0;
 out_free_calldata:
 	kfree(calldata);
 out:
+	nfs4_put_open_state(state);
+	nfs4_put_state_owner(sp);
 	return status;
 }
 
-static int nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
+static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
 {
 	struct file *filp;
+	int ret;
 
-	filp = lookup_instantiate_filp(nd, dentry, NULL);
+	/* If the open_intent is for execute, we have an extra check to make */
+	if (nd->intent.open.flags & FMODE_EXEC) {
+		ret = _nfs4_do_access(state->inode,
+				state->owner->so_cred,
+				nd->intent.open.flags);
+		if (ret < 0)
+			goto out_close;
+	}
+	filp = lookup_instantiate_filp(nd, path->dentry, NULL);
 	if (!IS_ERR(filp)) {
 		struct nfs_open_context *ctx;
 		ctx = (struct nfs_open_context *)filp->private_data;
 		ctx->state = state;
 		return 0;
 	}
-	nfs4_close_state(state, nd->intent.open.flags);
-	return PTR_ERR(filp);
+	ret = PTR_ERR(filp);
+out_close:
+	nfs4_close_state(path, state, nd->intent.open.flags);
+	return ret;
 }
 
 struct dentry *
 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
 {
+	struct path path = {
+		.mnt = nd->mnt,
+		.dentry = dentry,
+	};
 	struct iattr attr;
 	struct rpc_cred *cred;
 	struct nfs4_state *state;
@@ -1277,7 +1410,7 @@ nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
 	cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
 	if (IS_ERR(cred))
 		return (struct dentry *)cred;
-	state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
+	state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
 	put_rpccred(cred);
 	if (IS_ERR(state)) {
 		if (PTR_ERR(state) == -ENOENT)
@@ -1287,22 +1420,24 @@ nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
 	res = d_add_unique(dentry, igrab(state->inode));
 	if (res != NULL)
 		dentry = res;
-	nfs4_intent_set_file(nd, dentry, state);
+	nfs4_intent_set_file(nd, &path, state);
 	return res;
 }
 
 int
 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
 {
+	struct path path = {
+		.mnt = nd->mnt,
+		.dentry = dentry,
+	};
 	struct rpc_cred *cred;
 	struct nfs4_state *state;
 
 	cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
 	if (IS_ERR(cred))
 		return PTR_ERR(cred);
-	state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
-	if (IS_ERR(state))
-		state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
+	state = nfs4_do_open(dir, &path, openflags, NULL, cred);
 	put_rpccred(cred);
 	if (IS_ERR(state)) {
 		switch (PTR_ERR(state)) {
@@ -1318,10 +1453,10 @@ nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, st
 		}
 	}
 	if (state->inode == dentry->d_inode) {
-		nfs4_intent_set_file(nd, dentry, state);
+		nfs4_intent_set_file(nd, &path, state);
 		return 1;
 	}
-	nfs4_close_state(state, openflags);
+	nfs4_close_state(&path, state, openflags);
 out_drop:
 	d_drop(dentry);
 	return 0;
@@ -1559,8 +1694,6 @@ static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
 	dprintk("NFS call  lookupfh %s\n", name->name);
 	status = rpc_call_sync(server->client, &msg, 0);
 	dprintk("NFS reply lookupfh: %d\n", status);
-	if (status == -NFS4ERR_MOVED)
-		status = -EREMOTE;
 	return status;
 }
 
@@ -1571,10 +1704,13 @@ static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
 	struct nfs4_exception exception = { };
 	int err;
 	do {
-		err = nfs4_handle_exception(server,
-				_nfs4_proc_lookupfh(server, dirfh, name,
-						    fhandle, fattr),
-				&exception);
+		err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
+		/* FIXME: !!!! */
+		if (err == -NFS4ERR_MOVED) {
+			err = -EREMOTE;
+			break;
+		}
+		err = nfs4_handle_exception(server, err, &exception);
 	} while (exception.retry);
 	return err;
 }
@@ -1582,28 +1718,10 @@ static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
 static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
 		struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 {
-	int		       status;
-	struct nfs_server *server = NFS_SERVER(dir);
-	struct nfs4_lookup_arg args = {
-		.bitmask = server->attr_bitmask,
-		.dir_fh = NFS_FH(dir),
-		.name = name,
-	};
-	struct nfs4_lookup_res res = {
-		.server = server,
-		.fattr = fattr,
-		.fh = fhandle,
-	};
-	struct rpc_message msg = {
-		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
-		.rpc_argp = &args,
-		.rpc_resp = &res,
-	};
-	
-	nfs_fattr_init(fattr);
+	int status;
 	
 	dprintk("NFS call  lookup %s\n", name->name);
-	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+	status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
 	if (status == -NFS4ERR_MOVED)
 		status = nfs4_get_referral(dir, name, fattr, fhandle);
 	dprintk("NFS reply lookup: %d\n", status);
@@ -1752,6 +1870,10 @@ static int
 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
                  int flags, struct nameidata *nd)
 {
+	struct path path = {
+		.mnt = nd->mnt,
+		.dentry = dentry,
+	};
 	struct nfs4_state *state;
 	struct rpc_cred *cred;
 	int status = 0;
@@ -1761,7 +1883,7 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 		status = PTR_ERR(cred);
 		goto out;
 	}
-	state = nfs4_do_open(dir, dentry, flags, sattr, cred);
+	state = nfs4_do_open(dir, &path, flags, sattr, cred);
 	put_rpccred(cred);
 	if (IS_ERR(state)) {
 		status = PTR_ERR(state);
@@ -1773,11 +1895,12 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 		status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
 		if (status == 0)
 			nfs_setattr_update_inode(state->inode, sattr);
+		nfs_post_op_update_inode(state->inode, &fattr);
 	}
-	if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
-		status = nfs4_intent_set_file(nd, dentry, state);
+	if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
+		status = nfs4_intent_set_file(nd, &path, state);
 	else
-		nfs4_close_state(state, flags);
+		nfs4_close_state(&path, state, flags);
 out:
 	return status;
 }
@@ -3008,7 +3131,7 @@ static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock
 	if (status != 0)
 		goto out;
 	lsp = request->fl_u.nfs4_fl.owner;
-	arg.lock_owner.id = lsp->ls_id; 
+	arg.lock_owner.id = lsp->ls_id.id;
 	status = rpc_call_sync(server->client, &msg, 0);
 	switch (status) {
 		case 0:
@@ -3152,6 +3275,11 @@ static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
 {
 	struct nfs4_unlockdata *data;
 
+	/* Ensure this is an unlock - when canceling a lock, the
+	 * canceled lock is passed in, and it won't be an unlock.
+	 */
+	fl->fl_type = F_UNLCK;
+
 	data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
 	if (data == NULL) {
 		nfs_free_seqid(seqid);
@@ -3222,7 +3350,7 @@ static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
 		goto out_free;
 	p->arg.lock_stateid = &lsp->ls_stateid;
 	p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
-	p->arg.lock_owner.id = lsp->ls_id;
+	p->arg.lock_owner.id = lsp->ls_id.id;
 	p->lsp = lsp;
 	atomic_inc(&lsp->ls_count);
 	p->ctx = get_nfs_open_context(ctx);
@@ -3285,7 +3413,7 @@ static void nfs4_lock_done(struct rpc_task *task, void *calldata)
 		memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
 					sizeof(data->lsp->ls_stateid.data));
 		data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
-		renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
+		renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
 	}
 	nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
 out:
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 8ed79d5..e9662ba 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -38,12 +38,14 @@
  * subsequent patch.
  */
 
+#include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/smp_lock.h>
 #include <linux/nfs_fs.h>
 #include <linux/nfs_idmap.h>
 #include <linux/kthread.h>
 #include <linux/module.h>
+#include <linux/random.h>
 #include <linux/workqueue.h>
 #include <linux/bitops.h>
 
@@ -69,33 +71,14 @@ static int nfs4_init_client(struct nfs_client *clp, struct rpc_cred *cred)
 	return status;
 }
 
-u32
-nfs4_alloc_lockowner_id(struct nfs_client *clp)
-{
-	return clp->cl_lockowner_id ++;
-}
-
-static struct nfs4_state_owner *
-nfs4_client_grab_unused(struct nfs_client *clp, struct rpc_cred *cred)
-{
-	struct nfs4_state_owner *sp = NULL;
-
-	if (!list_empty(&clp->cl_unused)) {
-		sp = list_entry(clp->cl_unused.next, struct nfs4_state_owner, so_list);
-		atomic_inc(&sp->so_count);
-		sp->so_cred = cred;
-		list_move(&sp->so_list, &clp->cl_state_owners);
-		clp->cl_nunused--;
-	}
-	return sp;
-}
-
 struct rpc_cred *nfs4_get_renew_cred(struct nfs_client *clp)
 {
 	struct nfs4_state_owner *sp;
+	struct rb_node *pos;
 	struct rpc_cred *cred = NULL;
 
-	list_for_each_entry(sp, &clp->cl_state_owners, so_list) {
+	for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) {
+		sp = rb_entry(pos, struct nfs4_state_owner, so_client_node);
 		if (list_empty(&sp->so_states))
 			continue;
 		cred = get_rpccred(sp->so_cred);
@@ -107,32 +90,146 @@ struct rpc_cred *nfs4_get_renew_cred(struct nfs_client *clp)
 static struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp)
 {
 	struct nfs4_state_owner *sp;
+	struct rb_node *pos;
 
-	if (!list_empty(&clp->cl_state_owners)) {
-		sp = list_entry(clp->cl_state_owners.next,
-				struct nfs4_state_owner, so_list);
+	pos = rb_first(&clp->cl_state_owners);
+	if (pos != NULL) {
+		sp = rb_entry(pos, struct nfs4_state_owner, so_client_node);
 		return get_rpccred(sp->so_cred);
 	}
 	return NULL;
 }
 
+static void nfs_alloc_unique_id(struct rb_root *root, struct nfs_unique_id *new,
+		__u64 minval, int maxbits)
+{
+	struct rb_node **p, *parent;
+	struct nfs_unique_id *pos;
+	__u64 mask = ~0ULL;
+
+	if (maxbits < 64)
+		mask = (1ULL << maxbits) - 1ULL;
+
+	/* Ensure distribution is more or less flat */
+	get_random_bytes(&new->id, sizeof(new->id));
+	new->id &= mask;
+	if (new->id < minval)
+		new->id += minval;
+retry:
+	p = &root->rb_node;
+	parent = NULL;
+
+	while (*p != NULL) {
+		parent = *p;
+		pos = rb_entry(parent, struct nfs_unique_id, rb_node);
+
+		if (new->id < pos->id)
+			p = &(*p)->rb_left;
+		else if (new->id > pos->id)
+			p = &(*p)->rb_right;
+		else
+			goto id_exists;
+	}
+	rb_link_node(&new->rb_node, parent, p);
+	rb_insert_color(&new->rb_node, root);
+	return;
+id_exists:
+	for (;;) {
+		new->id++;
+		if (new->id < minval || (new->id & mask) != new->id) {
+			new->id = minval;
+			break;
+		}
+		parent = rb_next(parent);
+		if (parent == NULL)
+			break;
+		pos = rb_entry(parent, struct nfs_unique_id, rb_node);
+		if (new->id < pos->id)
+			break;
+	}
+	goto retry;
+}
+
+static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id)
+{
+	rb_erase(&id->rb_node, root);
+}
+
 static struct nfs4_state_owner *
-nfs4_find_state_owner(struct nfs_client *clp, struct rpc_cred *cred)
+nfs4_find_state_owner(struct nfs_server *server, struct rpc_cred *cred)
 {
+	struct nfs_client *clp = server->nfs_client;
+	struct rb_node **p = &clp->cl_state_owners.rb_node,
+		       *parent = NULL;
 	struct nfs4_state_owner *sp, *res = NULL;
 
-	list_for_each_entry(sp, &clp->cl_state_owners, so_list) {
-		if (sp->so_cred != cred)
+	while (*p != NULL) {
+		parent = *p;
+		sp = rb_entry(parent, struct nfs4_state_owner, so_client_node);
+
+		if (server < sp->so_server) {
+			p = &parent->rb_left;
 			continue;
-		atomic_inc(&sp->so_count);
-		/* Move to the head of the list */
-		list_move(&sp->so_list, &clp->cl_state_owners);
-		res = sp;
-		break;
+		}
+		if (server > sp->so_server) {
+			p = &parent->rb_right;
+			continue;
+		}
+		if (cred < sp->so_cred)
+			p = &parent->rb_left;
+		else if (cred > sp->so_cred)
+			p = &parent->rb_right;
+		else {
+			atomic_inc(&sp->so_count);
+			res = sp;
+			break;
+		}
 	}
 	return res;
 }
 
+static struct nfs4_state_owner *
+nfs4_insert_state_owner(struct nfs_client *clp, struct nfs4_state_owner *new)
+{
+	struct rb_node **p = &clp->cl_state_owners.rb_node,
+		       *parent = NULL;
+	struct nfs4_state_owner *sp;
+
+	while (*p != NULL) {
+		parent = *p;
+		sp = rb_entry(parent, struct nfs4_state_owner, so_client_node);
+
+		if (new->so_server < sp->so_server) {
+			p = &parent->rb_left;
+			continue;
+		}
+		if (new->so_server > sp->so_server) {
+			p = &parent->rb_right;
+			continue;
+		}
+		if (new->so_cred < sp->so_cred)
+			p = &parent->rb_left;
+		else if (new->so_cred > sp->so_cred)
+			p = &parent->rb_right;
+		else {
+			atomic_inc(&sp->so_count);
+			return sp;
+		}
+	}
+	nfs_alloc_unique_id(&clp->cl_openowner_id, &new->so_owner_id, 1, 64);
+	rb_link_node(&new->so_client_node, parent, p);
+	rb_insert_color(&new->so_client_node, &clp->cl_state_owners);
+	return new;
+}
+
+static void
+nfs4_remove_state_owner(struct nfs_client *clp, struct nfs4_state_owner *sp)
+{
+	if (!RB_EMPTY_NODE(&sp->so_client_node))
+		rb_erase(&sp->so_client_node, &clp->cl_state_owners);
+	nfs_free_unique_id(&clp->cl_openowner_id, &sp->so_owner_id);
+}
+
 /*
  * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to
  * create a new state_owner.
@@ -160,10 +257,14 @@ nfs4_alloc_state_owner(void)
 void
 nfs4_drop_state_owner(struct nfs4_state_owner *sp)
 {
-	struct nfs_client *clp = sp->so_client;
-	spin_lock(&clp->cl_lock);
-	list_del_init(&sp->so_list);
-	spin_unlock(&clp->cl_lock);
+	if (!RB_EMPTY_NODE(&sp->so_client_node)) {
+		struct nfs_client *clp = sp->so_client;
+
+		spin_lock(&clp->cl_lock);
+		rb_erase(&sp->so_client_node, &clp->cl_state_owners);
+		RB_CLEAR_NODE(&sp->so_client_node);
+		spin_unlock(&clp->cl_lock);
+	}
 }
 
 /*
@@ -175,26 +276,25 @@ struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct
 	struct nfs_client *clp = server->nfs_client;
 	struct nfs4_state_owner *sp, *new;
 
-	get_rpccred(cred);
-	new = nfs4_alloc_state_owner();
 	spin_lock(&clp->cl_lock);
-	sp = nfs4_find_state_owner(clp, cred);
-	if (sp == NULL)
-		sp = nfs4_client_grab_unused(clp, cred);
-	if (sp == NULL && new != NULL) {
-		list_add(&new->so_list, &clp->cl_state_owners);
-		new->so_client = clp;
-		new->so_id = nfs4_alloc_lockowner_id(clp);
-		new->so_cred = cred;
-		sp = new;
-		new = NULL;
-	}
+	sp = nfs4_find_state_owner(server, cred);
 	spin_unlock(&clp->cl_lock);
-	kfree(new);
 	if (sp != NULL)
 		return sp;
-	put_rpccred(cred);
-	return NULL;
+	new = nfs4_alloc_state_owner();
+	if (new == NULL)
+		return NULL;
+	new->so_client = clp;
+	new->so_server = server;
+	new->so_cred = cred;
+	spin_lock(&clp->cl_lock);
+	sp = nfs4_insert_state_owner(clp, new);
+	spin_unlock(&clp->cl_lock);
+	if (sp == new)
+		get_rpccred(cred);
+	else
+		kfree(new);
+	return sp;
 }
 
 /*
@@ -208,18 +308,7 @@ void nfs4_put_state_owner(struct nfs4_state_owner *sp)
 
 	if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock))
 		return;
-	if (clp->cl_nunused >= OPENOWNER_POOL_SIZE)
-		goto out_free;
-	if (list_empty(&sp->so_list))
-		goto out_free;
-	list_move(&sp->so_list, &clp->cl_unused);
-	clp->cl_nunused++;
-	spin_unlock(&clp->cl_lock);
-	put_rpccred(cred);
-	cred = NULL;
-	return;
-out_free:
-	list_del(&sp->so_list);
+	nfs4_remove_state_owner(clp, sp);
 	spin_unlock(&clp->cl_lock);
 	put_rpccred(cred);
 	kfree(sp);
@@ -236,6 +325,7 @@ nfs4_alloc_open_state(void)
 	atomic_set(&state->count, 1);
 	INIT_LIST_HEAD(&state->lock_states);
 	spin_lock_init(&state->state_lock);
+	seqlock_init(&state->seqlock);
 	return state;
 }
 
@@ -263,13 +353,10 @@ __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner)
 	struct nfs4_state *state;
 
 	list_for_each_entry(state, &nfsi->open_states, inode_states) {
-		/* Is this in the process of being freed? */
-		if (state->state == 0)
+		if (state->owner != owner)
 			continue;
-		if (state->owner == owner) {
-			atomic_inc(&state->count);
+		if (atomic_inc_not_zero(&state->count))
 			return state;
-		}
 	}
 	return NULL;
 }
@@ -341,16 +428,15 @@ void nfs4_put_open_state(struct nfs4_state *state)
 /*
  * Close the current file.
  */
-void nfs4_close_state(struct nfs4_state *state, mode_t mode)
+void nfs4_close_state(struct path *path, struct nfs4_state *state, mode_t mode)
 {
-	struct inode *inode = state->inode;
 	struct nfs4_state_owner *owner = state->owner;
-	int oldstate, newstate = 0;
+	int call_close = 0;
+	int newstate;
 
 	atomic_inc(&owner->so_count);
 	/* Protect against nfs4_find_state() */
 	spin_lock(&owner->so_lock);
-	spin_lock(&inode->i_lock);
 	switch (mode & (FMODE_READ | FMODE_WRITE)) {
 		case FMODE_READ:
 			state->n_rdonly--;
@@ -361,24 +447,29 @@ void nfs4_close_state(struct nfs4_state *state, mode_t mode)
 		case FMODE_READ|FMODE_WRITE:
 			state->n_rdwr--;
 	}
-	oldstate = newstate = state->state;
+	newstate = FMODE_READ|FMODE_WRITE;
 	if (state->n_rdwr == 0) {
-		if (state->n_rdonly == 0)
+		if (state->n_rdonly == 0) {
 			newstate &= ~FMODE_READ;
-		if (state->n_wronly == 0)
+			call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
+			call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
+		}
+		if (state->n_wronly == 0) {
 			newstate &= ~FMODE_WRITE;
+			call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
+			call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
+		}
+		if (newstate == 0)
+			clear_bit(NFS_DELEGATED_STATE, &state->flags);
 	}
-	if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
-		nfs4_state_set_mode_locked(state, newstate);
-		oldstate = newstate;
-	}
-	spin_unlock(&inode->i_lock);
+	nfs4_state_set_mode_locked(state, newstate);
 	spin_unlock(&owner->so_lock);
 
-	if (oldstate != newstate && nfs4_do_close(inode, state) == 0)
-		return;
-	nfs4_put_open_state(state);
-	nfs4_put_state_owner(owner);
+	if (!call_close) {
+		nfs4_put_open_state(state);
+		nfs4_put_state_owner(owner);
+	} else
+		nfs4_do_close(path, state);
 }
 
 /*
@@ -415,12 +506,22 @@ static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, f
 	atomic_set(&lsp->ls_count, 1);
 	lsp->ls_owner = fl_owner;
 	spin_lock(&clp->cl_lock);
-	lsp->ls_id = nfs4_alloc_lockowner_id(clp);
+	nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64);
 	spin_unlock(&clp->cl_lock);
 	INIT_LIST_HEAD(&lsp->ls_locks);
 	return lsp;
 }
 
+static void nfs4_free_lock_state(struct nfs4_lock_state *lsp)
+{
+	struct nfs_client *clp = lsp->ls_state->owner->so_client;
+
+	spin_lock(&clp->cl_lock);
+	nfs_free_unique_id(&clp->cl_lockowner_id, &lsp->ls_id);
+	spin_unlock(&clp->cl_lock);
+	kfree(lsp);
+}
+
 /*
  * Return a compatible lock_state. If no initialized lock_state structure
  * exists, return an uninitialized one.
@@ -450,7 +551,8 @@ static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_
 			return NULL;
 	}
 	spin_unlock(&state->state_lock);
-	kfree(new);
+	if (new != NULL)
+		nfs4_free_lock_state(new);
 	return lsp;
 }
 
@@ -471,7 +573,7 @@ void nfs4_put_lock_state(struct nfs4_lock_state *lsp)
 	if (list_empty(&state->lock_states))
 		clear_bit(LK_STATE_IN_USE, &state->flags);
 	spin_unlock(&state->state_lock);
-	kfree(lsp);
+	nfs4_free_lock_state(lsp);
 }
 
 static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src)
@@ -513,8 +615,12 @@ int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl)
 void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner)
 {
 	struct nfs4_lock_state *lsp;
+	int seq;
 
-	memcpy(dst, &state->stateid, sizeof(*dst));
+	do {
+		seq = read_seqbegin(&state->seqlock);
+		memcpy(dst, &state->stateid, sizeof(*dst));
+	} while (read_seqretry(&state->seqlock, seq));
 	if (test_bit(LK_STATE_IN_USE, &state->flags) == 0)
 		return;
 
@@ -557,12 +663,18 @@ void nfs_free_seqid(struct nfs_seqid *seqid)
  * failed with a seqid incrementing error -
  * see comments nfs_fs.h:seqid_mutating_error()
  */
-static inline void nfs_increment_seqid(int status, struct nfs_seqid *seqid)
+static void nfs_increment_seqid(int status, struct nfs_seqid *seqid)
 {
 	switch (status) {
 		case 0:
 			break;
 		case -NFS4ERR_BAD_SEQID:
+			if (seqid->sequence->flags & NFS_SEQID_CONFIRMED)
+				return;
+			printk(KERN_WARNING "NFS: v4 server returned a bad"
+					"sequence-id error on an"
+					"unconfirmed sequence %p!\n",
+					seqid->sequence);
 		case -NFS4ERR_STALE_CLIENTID:
 		case -NFS4ERR_STALE_STATEID:
 		case -NFS4ERR_BAD_STATEID:
@@ -586,7 +698,7 @@ void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid)
 				struct nfs4_state_owner, so_seqid);
 		nfs4_drop_state_owner(sp);
 	}
-	return nfs_increment_seqid(status, seqid);
+	nfs_increment_seqid(status, seqid);
 }
 
 /*
@@ -596,7 +708,7 @@ void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid)
  */
 void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid)
 {
-	return nfs_increment_seqid(status, seqid);
+	nfs_increment_seqid(status, seqid);
 }
 
 int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task)
@@ -748,15 +860,21 @@ out_err:
 static void nfs4_state_mark_reclaim(struct nfs_client *clp)
 {
 	struct nfs4_state_owner *sp;
+	struct rb_node *pos;
 	struct nfs4_state *state;
 	struct nfs4_lock_state *lock;
 
 	/* Reset all sequence ids to zero */
-	list_for_each_entry(sp, &clp->cl_state_owners, so_list) {
+	for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) {
+		sp = rb_entry(pos, struct nfs4_state_owner, so_client_node);
 		sp->so_seqid.counter = 0;
 		sp->so_seqid.flags = 0;
 		spin_lock(&sp->so_lock);
 		list_for_each_entry(state, &sp->so_states, open_states) {
+			clear_bit(NFS_DELEGATED_STATE, &state->flags);
+			clear_bit(NFS_O_RDONLY_STATE, &state->flags);
+			clear_bit(NFS_O_WRONLY_STATE, &state->flags);
+			clear_bit(NFS_O_RDWR_STATE, &state->flags);
 			list_for_each_entry(lock, &state->lock_states, ls_locks) {
 				lock->ls_seqid.counter = 0;
 				lock->ls_seqid.flags = 0;
@@ -771,6 +889,7 @@ static int reclaimer(void *ptr)
 {
 	struct nfs_client *clp = ptr;
 	struct nfs4_state_owner *sp;
+	struct rb_node *pos;
 	struct nfs4_state_recovery_ops *ops;
 	struct rpc_cred *cred;
 	int status = 0;
@@ -816,7 +935,8 @@ restart_loop:
 	/* Mark all delegations for reclaim */
 	nfs_delegation_mark_reclaim(clp);
 	/* Note: list is protected by exclusive lock on cl->cl_sem */
-	list_for_each_entry(sp, &clp->cl_state_owners, so_list) {
+	for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) {
+		sp = rb_entry(pos, struct nfs4_state_owner, so_client_node);
 		status = nfs4_reclaim_open_state(ops, sp);
 		if (status < 0) {
 			if (status == -NFS4ERR_NO_GRACE) {
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 8003c91..c087384 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -68,9 +68,10 @@ static int nfs4_stat_to_errno(int);
 #endif
 
 /* lock,open owner id: 
- * we currently use size 1 (u32) out of (NFS4_OPAQUE_LIMIT  >> 2)
+ * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT  >> 2)
  */
-#define owner_id_maxsz          (1 + 1)
+#define open_owner_id_maxsz	(1 + 4)
+#define lock_owner_id_maxsz	(1 + 4)
 #define compound_encode_hdr_maxsz	(3 + (NFS4_MAXTAGLEN >> 2))
 #define compound_decode_hdr_maxsz	(3 + (NFS4_MAXTAGLEN >> 2))
 #define op_encode_hdr_maxsz	(1)
@@ -87,9 +88,11 @@ static int nfs4_stat_to_errno(int);
 #define encode_getattr_maxsz    (op_encode_hdr_maxsz + nfs4_fattr_bitmap_maxsz)
 #define nfs4_name_maxsz		(1 + ((3 + NFS4_MAXNAMLEN) >> 2))
 #define nfs4_path_maxsz		(1 + ((3 + NFS4_MAXPATHLEN) >> 2))
+#define nfs4_owner_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
+#define nfs4_group_maxsz	(1 + XDR_QUADLEN(IDMAP_NAMESZ))
 /* This is based on getfattr, which uses the most attributes: */
 #define nfs4_fattr_value_maxsz	(1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \
-				3 + 3 + 3 + 2 * nfs4_name_maxsz))
+				3 + 3 + 3 + nfs4_owner_maxsz + nfs4_group_maxsz))
 #define nfs4_fattr_maxsz	(nfs4_fattr_bitmap_maxsz + \
 				nfs4_fattr_value_maxsz)
 #define decode_getattr_maxsz    (op_decode_hdr_maxsz + nfs4_fattr_maxsz)
@@ -116,8 +119,27 @@ static int nfs4_stat_to_errno(int);
 				3 + (NFS4_VERIFIER_SIZE >> 2))
 #define decode_setclientid_confirm_maxsz \
 				(op_decode_hdr_maxsz)
-#define encode_lookup_maxsz	(op_encode_hdr_maxsz + \
-				1 + ((3 + NFS4_FHSIZE) >> 2))
+#define encode_lookup_maxsz	(op_encode_hdr_maxsz + nfs4_name_maxsz)
+#define decode_lookup_maxsz	(op_decode_hdr_maxsz)
+#define encode_share_access_maxsz \
+				(2)
+#define encode_createmode_maxsz	(1 + nfs4_fattr_maxsz)
+#define encode_opentype_maxsz	(1 + encode_createmode_maxsz)
+#define encode_claim_null_maxsz	(1 + nfs4_name_maxsz)
+#define encode_open_maxsz	(op_encode_hdr_maxsz + \
+				2 + encode_share_access_maxsz + 2 + \
+				open_owner_id_maxsz + \
+				encode_opentype_maxsz + \
+				encode_claim_null_maxsz)
+#define decode_ace_maxsz	(3 + nfs4_owner_maxsz)
+#define decode_delegation_maxsz	(1 + XDR_QUADLEN(NFS4_STATEID_SIZE) + 1 + \
+				decode_ace_maxsz)
+#define decode_change_info_maxsz	(5)
+#define decode_open_maxsz	(op_decode_hdr_maxsz + \
+				XDR_QUADLEN(NFS4_STATEID_SIZE) + \
+				decode_change_info_maxsz + 1 + \
+				nfs4_fattr_bitmap_maxsz + \
+				decode_delegation_maxsz)
 #define encode_remove_maxsz	(op_encode_hdr_maxsz + \
 				nfs4_name_maxsz)
 #define encode_rename_maxsz	(op_encode_hdr_maxsz + \
@@ -134,9 +156,15 @@ static int nfs4_stat_to_errno(int);
 #define encode_create_maxsz	(op_encode_hdr_maxsz + \
 				2 + nfs4_name_maxsz + \
 				nfs4_fattr_maxsz)
-#define decode_create_maxsz	(op_decode_hdr_maxsz + 8)
+#define decode_create_maxsz	(op_decode_hdr_maxsz + \
+				decode_change_info_maxsz + \
+				nfs4_fattr_bitmap_maxsz)
 #define encode_delegreturn_maxsz (op_encode_hdr_maxsz + 4)
 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
+#define encode_fs_locations_maxsz \
+				(encode_getattr_maxsz)
+#define decode_fs_locations_maxsz \
+				(0)
 #define NFS4_enc_compound_sz	(1024)  /* XXX: large enough? */
 #define NFS4_dec_compound_sz	(1024)  /* XXX: large enough? */
 #define NFS4_enc_read_sz	(compound_encode_hdr_maxsz + \
@@ -174,16 +202,21 @@ static int nfs4_stat_to_errno(int);
 				op_decode_hdr_maxsz + 2 + \
 				decode_getattr_maxsz)
 #define NFS4_enc_open_sz        (compound_encode_hdr_maxsz + \
-                                encode_putfh_maxsz + \
-                                op_encode_hdr_maxsz + \
-                                13 + 3 + 2 + 64 + \
-                                encode_getattr_maxsz + \
-                                encode_getfh_maxsz)
+				encode_putfh_maxsz + \
+				encode_savefh_maxsz + \
+				encode_open_maxsz + \
+				encode_getfh_maxsz + \
+				encode_getattr_maxsz + \
+				encode_restorefh_maxsz + \
+				encode_getattr_maxsz)
 #define NFS4_dec_open_sz        (compound_decode_hdr_maxsz + \
-                                decode_putfh_maxsz + \
-                                op_decode_hdr_maxsz + 4 + 5 + 2 + 3 + \
-                                decode_getattr_maxsz + \
-                                decode_getfh_maxsz)
+				decode_putfh_maxsz + \
+				decode_savefh_maxsz + \
+				decode_open_maxsz + \
+				decode_getfh_maxsz + \
+				decode_getattr_maxsz + \
+				decode_restorefh_maxsz + \
+				decode_getattr_maxsz)
 #define NFS4_enc_open_confirm_sz      \
                                 (compound_encode_hdr_maxsz + \
                                 encode_putfh_maxsz + \
@@ -193,12 +226,12 @@ static int nfs4_stat_to_errno(int);
                                         op_decode_hdr_maxsz + 4)
 #define NFS4_enc_open_noattr_sz	(compound_encode_hdr_maxsz + \
 					encode_putfh_maxsz + \
-					op_encode_hdr_maxsz + \
-					11)
+					encode_open_maxsz + \
+					encode_getattr_maxsz)
 #define NFS4_dec_open_noattr_sz	(compound_decode_hdr_maxsz + \
 					decode_putfh_maxsz + \
-					op_decode_hdr_maxsz + \
-					4 + 5 + 2 + 3)
+					decode_open_maxsz + \
+					decode_getattr_maxsz)
 #define NFS4_enc_open_downgrade_sz \
 				(compound_encode_hdr_maxsz + \
                                 encode_putfh_maxsz + \
@@ -256,19 +289,19 @@ static int nfs4_stat_to_errno(int);
 				op_encode_hdr_maxsz + \
 				1 + 1 + 2 + 2 + \
 				1 + 4 + 1 + 2 + \
-				owner_id_maxsz)
+				lock_owner_id_maxsz)
 #define NFS4_dec_lock_sz        (compound_decode_hdr_maxsz + \
 				decode_putfh_maxsz + \
 				decode_getattr_maxsz + \
 				op_decode_hdr_maxsz + \
 				2 + 2 + 1 + 2 + \
-				owner_id_maxsz)
+				lock_owner_id_maxsz)
 #define NFS4_enc_lockt_sz       (compound_encode_hdr_maxsz + \
 				encode_putfh_maxsz + \
 				encode_getattr_maxsz + \
 				op_encode_hdr_maxsz + \
 				1 + 2 + 2 + 2 + \
-				owner_id_maxsz)
+				lock_owner_id_maxsz)
 #define NFS4_dec_lockt_sz       (NFS4_dec_lock_sz)
 #define NFS4_enc_locku_sz       (compound_encode_hdr_maxsz + \
 				encode_putfh_maxsz + \
@@ -298,7 +331,7 @@ static int nfs4_stat_to_errno(int);
 				encode_getfh_maxsz)
 #define NFS4_dec_lookup_sz	(compound_decode_hdr_maxsz + \
 				decode_putfh_maxsz + \
-				op_decode_hdr_maxsz + \
+				decode_lookup_maxsz + \
 				decode_getattr_maxsz + \
 				decode_getfh_maxsz)
 #define NFS4_enc_lookup_root_sz (compound_encode_hdr_maxsz + \
@@ -417,12 +450,13 @@ static int nfs4_stat_to_errno(int);
 #define NFS4_enc_fs_locations_sz \
 				(compound_encode_hdr_maxsz + \
 				 encode_putfh_maxsz + \
-				 encode_getattr_maxsz)
+				 encode_lookup_maxsz + \
+				 encode_fs_locations_maxsz)
 #define NFS4_dec_fs_locations_sz \
 				(compound_decode_hdr_maxsz + \
 				 decode_putfh_maxsz + \
-				 op_decode_hdr_maxsz + \
-				 nfs4_fattr_bitmap_maxsz)
+				 decode_lookup_maxsz + \
+				 decode_fs_locations_maxsz)
 
 static struct {
 	unsigned int	mode;
@@ -793,13 +827,14 @@ static int encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args)
 	WRITE64(nfs4_lock_length(args->fl));
 	WRITE32(args->new_lock_owner);
 	if (args->new_lock_owner){
-		RESERVE_SPACE(4+NFS4_STATEID_SIZE+20);
+		RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
 		WRITE32(args->open_seqid->sequence->counter);
 		WRITEMEM(args->open_stateid->data, NFS4_STATEID_SIZE);
 		WRITE32(args->lock_seqid->sequence->counter);
 		WRITE64(args->lock_owner.clientid);
-		WRITE32(4);
-		WRITE32(args->lock_owner.id);
+		WRITE32(16);
+		WRITEMEM("lock id:", 8);
+		WRITE64(args->lock_owner.id);
 	}
 	else {
 		RESERVE_SPACE(NFS4_STATEID_SIZE+4);
@@ -814,14 +849,15 @@ static int encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *arg
 {
 	__be32 *p;
 
-	RESERVE_SPACE(40);
+	RESERVE_SPACE(52);
 	WRITE32(OP_LOCKT);
 	WRITE32(nfs4_lock_type(args->fl, 0));
 	WRITE64(args->fl->fl_start);
 	WRITE64(nfs4_lock_length(args->fl));
 	WRITE64(args->lock_owner.clientid);
-	WRITE32(4);
-	WRITE32(args->lock_owner.id);
+	WRITE32(16);
+	WRITEMEM("lock id:", 8);
+	WRITE64(args->lock_owner.id);
 
 	return 0;
 }
@@ -886,10 +922,11 @@ static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_opena
 	WRITE32(OP_OPEN);
 	WRITE32(arg->seqid->sequence->counter);
 	encode_share_access(xdr, arg->open_flags);
-	RESERVE_SPACE(16);
+	RESERVE_SPACE(28);
 	WRITE64(arg->clientid);
-	WRITE32(4);
-	WRITE32(arg->id);
+	WRITE32(16);
+	WRITEMEM("open id:", 8);
+	WRITE64(arg->id);
 }
 
 static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
@@ -1071,7 +1108,7 @@ static int encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args)
 
 static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req)
 {
-	struct rpc_auth *auth = req->rq_task->tk_auth;
+	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	uint32_t attrs[2] = {
 		FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
 		FATTR4_WORD1_MOUNTED_ON_FILEID,
@@ -1117,7 +1154,7 @@ static int encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg
 
 static int encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req)
 {
-	struct rpc_auth *auth = req->rq_task->tk_auth;
+	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	unsigned int replen;
 	__be32 *p;
 
@@ -1735,7 +1772,7 @@ out:
  */
 static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
 {
-	struct rpc_auth	*auth = req->rq_task->tk_auth;
+	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	struct xdr_stream xdr;
 	struct compound_hdr hdr = {
 		.nops = 2,
@@ -1795,7 +1832,7 @@ nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p,
 		struct nfs_getaclargs *args)
 {
 	struct xdr_stream xdr;
-	struct rpc_auth *auth = req->rq_task->tk_auth;
+	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	struct compound_hdr hdr = {
 		.nops   = 2,
 	};
@@ -2030,7 +2067,7 @@ static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs
 	struct compound_hdr hdr = {
 		.nops = 3,
 	};
-	struct rpc_auth *auth = req->rq_task->tk_auth;
+	struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
 	int replen;
 	int status;
 
@@ -3269,7 +3306,7 @@ static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
 {
         __be32 *p;
-        uint32_t bmlen;
+	uint32_t savewords, bmlen, i;
         int status;
 
         status = decode_op_hdr(xdr, OP_OPEN);
@@ -3287,7 +3324,12 @@ static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
                 goto xdr_error;
 
         READ_BUF(bmlen << 2);
-        p += bmlen;
+	savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
+	for (i = 0; i < savewords; ++i)
+		READ32(res->attrset[i]);
+	for (; i < NFS4_BITMAP_SIZE; i++)
+		res->attrset[i] = 0;
+
 	return decode_delegation(xdr, res);
 xdr_error:
 	dprintk("%s: Bitmap too large! Length = %u\n", __FUNCTION__, bmlen);
diff --git a/fs/nfs/nfsroot.c b/fs/nfs/nfsroot.c
index 49d1008..3490322 100644
--- a/fs/nfs/nfsroot.c
+++ b/fs/nfs/nfsroot.c
@@ -428,7 +428,7 @@ static int __init root_nfs_getport(int program, int version, int proto)
 	printk(KERN_NOTICE "Looking up port of RPC %d/%d on %u.%u.%u.%u\n",
 		program, version, NIPQUAD(servaddr));
 	set_sockaddr(&sin, servaddr, 0);
-	return rpcb_getport_external(&sin, program, version, proto);
+	return rpcb_getport_sync(&sin, program, version, proto);
 }
 
 
@@ -496,7 +496,8 @@ static int __init root_nfs_get_handle(void)
 					NFS_MNT3_VERSION : NFS_MNT_VERSION;
 
 	set_sockaddr(&sin, servaddr, htons(mount_port));
-	status = nfsroot_mount(&sin, nfs_path, &fh, version, protocol);
+	status = nfs_mount((struct sockaddr *) &sin, sizeof(sin), NULL,
+			   nfs_path, version, protocol, &fh);
 	if (status < 0)
 		printk(KERN_ERR "Root-NFS: Server returned error %d "
 				"while mounting %s\n", status, nfs_path);
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index c5bb51a..f56dae5 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -85,9 +85,8 @@ nfs_create_request(struct nfs_open_context *ctx, struct inode *inode,
 	req->wb_offset  = offset;
 	req->wb_pgbase	= offset;
 	req->wb_bytes   = count;
-	atomic_set(&req->wb_count, 1);
 	req->wb_context = get_nfs_open_context(ctx);
-
+	kref_init(&req->wb_kref);
 	return req;
 }
 
@@ -109,30 +108,31 @@ void nfs_unlock_request(struct nfs_page *req)
 }
 
 /**
- * nfs_set_page_writeback_locked - Lock a request for writeback
+ * nfs_set_page_tag_locked - Tag a request as locked
  * @req:
  */
-int nfs_set_page_writeback_locked(struct nfs_page *req)
+static int nfs_set_page_tag_locked(struct nfs_page *req)
 {
-	struct nfs_inode *nfsi = NFS_I(req->wb_context->dentry->d_inode);
+	struct nfs_inode *nfsi = NFS_I(req->wb_context->path.dentry->d_inode);
 
 	if (!nfs_lock_request(req))
 		return 0;
-	radix_tree_tag_set(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_WRITEBACK);
+	radix_tree_tag_set(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_LOCKED);
 	return 1;
 }
 
 /**
- * nfs_clear_page_writeback - Unlock request and wake up sleepers
+ * nfs_clear_page_tag_locked - Clear request tag and wake up sleepers
  */
-void nfs_clear_page_writeback(struct nfs_page *req)
+void nfs_clear_page_tag_locked(struct nfs_page *req)
 {
-	struct nfs_inode *nfsi = NFS_I(req->wb_context->dentry->d_inode);
+	struct inode *inode = req->wb_context->path.dentry->d_inode;
+	struct nfs_inode *nfsi = NFS_I(inode);
 
 	if (req->wb_page != NULL) {
-		spin_lock(&nfsi->req_lock);
-		radix_tree_tag_clear(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_WRITEBACK);
-		spin_unlock(&nfsi->req_lock);
+		spin_lock(&inode->i_lock);
+		radix_tree_tag_clear(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_LOCKED);
+		spin_unlock(&inode->i_lock);
 	}
 	nfs_unlock_request(req);
 }
@@ -160,11 +160,9 @@ void nfs_clear_request(struct nfs_page *req)
  *
  * Note: Should never be called with the spinlock held!
  */
-void
-nfs_release_request(struct nfs_page *req)
+static void nfs_free_request(struct kref *kref)
 {
-	if (!atomic_dec_and_test(&req->wb_count))
-		return;
+	struct nfs_page *req = container_of(kref, struct nfs_page, wb_kref);
 
 	/* Release struct file or cached credential */
 	nfs_clear_request(req);
@@ -172,6 +170,11 @@ nfs_release_request(struct nfs_page *req)
 	nfs_page_free(req);
 }
 
+void nfs_release_request(struct nfs_page *req)
+{
+	kref_put(&req->wb_kref, nfs_free_request);
+}
+
 static int nfs_wait_bit_interruptible(void *word)
 {
 	int ret = 0;
@@ -193,7 +196,7 @@ static int nfs_wait_bit_interruptible(void *word)
 int
 nfs_wait_on_request(struct nfs_page *req)
 {
-        struct rpc_clnt	*clnt = NFS_CLIENT(req->wb_context->dentry->d_inode);
+	struct rpc_clnt *clnt = NFS_CLIENT(req->wb_context->path.dentry->d_inode);
 	sigset_t oldmask;
 	int ret = 0;
 
@@ -379,20 +382,20 @@ void nfs_pageio_cond_complete(struct nfs_pageio_descriptor *desc, pgoff_t index)
 /**
  * nfs_scan_list - Scan a list for matching requests
  * @nfsi: NFS inode
- * @head: One of the NFS inode request lists
  * @dst: Destination list
  * @idx_start: lower bound of page->index to scan
  * @npages: idx_start + npages sets the upper bound to scan.
+ * @tag: tag to scan for
  *
  * Moves elements from one of the inode request lists.
  * If the number of requests is set to 0, the entire address_space
  * starting at index idx_start, is scanned.
  * The requests are *not* checked to ensure that they form a contiguous set.
- * You must be holding the inode's req_lock when calling this function
+ * You must be holding the inode's i_lock when calling this function
  */
-int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *head,
+int nfs_scan_list(struct nfs_inode *nfsi,
 		struct list_head *dst, pgoff_t idx_start,
-		unsigned int npages)
+		unsigned int npages, int tag)
 {
 	struct nfs_page *pgvec[NFS_SCAN_MAXENTRIES];
 	struct nfs_page *req;
@@ -407,9 +410,9 @@ int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *head,
 		idx_end = idx_start + npages - 1;
 
 	for (;;) {
-		found = radix_tree_gang_lookup(&nfsi->nfs_page_tree,
+		found = radix_tree_gang_lookup_tag(&nfsi->nfs_page_tree,
 				(void **)&pgvec[0], idx_start,
-				NFS_SCAN_MAXENTRIES);
+				NFS_SCAN_MAXENTRIES, tag);
 		if (found <= 0)
 			break;
 		for (i = 0; i < found; i++) {
@@ -417,15 +420,18 @@ int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *head,
 			if (req->wb_index > idx_end)
 				goto out;
 			idx_start = req->wb_index + 1;
-			if (req->wb_list_head != head)
-				continue;
-			if (nfs_set_page_writeback_locked(req)) {
+			if (nfs_set_page_tag_locked(req)) {
 				nfs_list_remove_request(req);
+				radix_tree_tag_clear(&nfsi->nfs_page_tree,
+						req->wb_index, tag);
 				nfs_list_add_request(req, dst);
 				res++;
+				if (res == INT_MAX)
+					goto out;
 			}
 		}
-
+		/* for latency reduction */
+		cond_resched_lock(&nfsi->vfs_inode.i_lock);
 	}
 out:
 	return res;
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 7bd7cb9..6ae2e58 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -145,8 +145,8 @@ static void nfs_readpage_release(struct nfs_page *req)
 	unlock_page(req->wb_page);
 
 	dprintk("NFS: read done (%s/%Ld %d@%Ld)\n",
-			req->wb_context->dentry->d_inode->i_sb->s_id,
-			(long long)NFS_FILEID(req->wb_context->dentry->d_inode),
+			req->wb_context->path.dentry->d_inode->i_sb->s_id,
+			(long long)NFS_FILEID(req->wb_context->path.dentry->d_inode),
 			req->wb_bytes,
 			(long long)req_offset(req));
 	nfs_clear_request(req);
@@ -164,7 +164,7 @@ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
 	int flags;
 
 	data->req	  = req;
-	data->inode	  = inode = req->wb_context->dentry->d_inode;
+	data->inode	  = inode = req->wb_context->path.dentry->d_inode;
 	data->cred	  = req->wb_context->cred;
 
 	data->args.fh     = NFS_FH(inode);
@@ -483,17 +483,19 @@ int nfs_readpage(struct file *file, struct page *page)
 	 */
 	error = nfs_wb_page(inode, page);
 	if (error)
-		goto out_error;
+		goto out_unlock;
+	if (PageUptodate(page))
+		goto out_unlock;
 
 	error = -ESTALE;
 	if (NFS_STALE(inode))
-		goto out_error;
+		goto out_unlock;
 
 	if (file == NULL) {
 		error = -EBADF;
 		ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
 		if (ctx == NULL)
-			goto out_error;
+			goto out_unlock;
 	} else
 		ctx = get_nfs_open_context((struct nfs_open_context *)
 				file->private_data);
@@ -502,8 +504,7 @@ int nfs_readpage(struct file *file, struct page *page)
 
 	put_nfs_open_context(ctx);
 	return error;
-
-out_error:
+out_unlock:
 	unlock_page(page);
 	return error;
 }
@@ -520,21 +521,32 @@ readpage_async_filler(void *data, struct page *page)
 	struct inode *inode = page->mapping->host;
 	struct nfs_page *new;
 	unsigned int len;
+	int error;
+
+	error = nfs_wb_page(inode, page);
+	if (error)
+		goto out_unlock;
+	if (PageUptodate(page))
+		goto out_unlock;
 
-	nfs_wb_page(inode, page);
 	len = nfs_page_length(page);
 	if (len == 0)
 		return nfs_return_empty_page(page);
+
 	new = nfs_create_request(desc->ctx, inode, page, 0, len);
-	if (IS_ERR(new)) {
-			SetPageError(page);
-			unlock_page(page);
-			return PTR_ERR(new);
-	}
+	if (IS_ERR(new))
+		goto out_error;
+
 	if (len < PAGE_CACHE_SIZE)
 		zero_user_page(page, len, PAGE_CACHE_SIZE - len, KM_USER0);
 	nfs_pageio_add_request(desc->pgio, new);
 	return 0;
+out_error:
+	error = PTR_ERR(new);
+	SetPageError(page);
+out_unlock:
+	unlock_page(page);
+	return error;
 }
 
 int nfs_readpages(struct file *filp, struct address_space *mapping,
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index ca20d3c..adffe16 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -45,6 +45,7 @@
 #include <linux/inet.h>
 #include <linux/nfs_xdr.h>
 #include <linux/magic.h>
+#include <linux/parser.h>
 
 #include <asm/system.h>
 #include <asm/uaccess.h>
@@ -57,6 +58,167 @@
 
 #define NFSDBG_FACILITY		NFSDBG_VFS
 
+
+struct nfs_parsed_mount_data {
+	int			flags;
+	int			rsize, wsize;
+	int			timeo, retrans;
+	int			acregmin, acregmax,
+				acdirmin, acdirmax;
+	int			namlen;
+	unsigned int		bsize;
+	unsigned int		auth_flavor_len;
+	rpc_authflavor_t	auth_flavors[1];
+	char			*client_address;
+
+	struct {
+		struct sockaddr_in	address;
+		unsigned int		program;
+		unsigned int		version;
+		unsigned short		port;
+		int			protocol;
+	} mount_server;
+
+	struct {
+		struct sockaddr_in	address;
+		char			*hostname;
+		char			*export_path;
+		unsigned int		program;
+		int			protocol;
+	} nfs_server;
+};
+
+enum {
+	/* Mount options that take no arguments */
+	Opt_soft, Opt_hard,
+	Opt_intr, Opt_nointr,
+	Opt_posix, Opt_noposix,
+	Opt_cto, Opt_nocto,
+	Opt_ac, Opt_noac,
+	Opt_lock, Opt_nolock,
+	Opt_v2, Opt_v3,
+	Opt_udp, Opt_tcp,
+	Opt_acl, Opt_noacl,
+	Opt_rdirplus, Opt_nordirplus,
+	Opt_sharecache, Opt_nosharecache,
+
+	/* Mount options that take integer arguments */
+	Opt_port,
+	Opt_rsize, Opt_wsize, Opt_bsize,
+	Opt_timeo, Opt_retrans,
+	Opt_acregmin, Opt_acregmax,
+	Opt_acdirmin, Opt_acdirmax,
+	Opt_actimeo,
+	Opt_namelen,
+	Opt_mountport,
+	Opt_mountprog, Opt_mountvers,
+	Opt_nfsprog, Opt_nfsvers,
+
+	/* Mount options that take string arguments */
+	Opt_sec, Opt_proto, Opt_mountproto,
+	Opt_addr, Opt_mounthost, Opt_clientaddr,
+
+	/* Mount options that are ignored */
+	Opt_userspace, Opt_deprecated,
+
+	Opt_err
+};
+
+static match_table_t nfs_mount_option_tokens = {
+	{ Opt_userspace, "bg" },
+	{ Opt_userspace, "fg" },
+	{ Opt_soft, "soft" },
+	{ Opt_hard, "hard" },
+	{ Opt_intr, "intr" },
+	{ Opt_nointr, "nointr" },
+	{ Opt_posix, "posix" },
+	{ Opt_noposix, "noposix" },
+	{ Opt_cto, "cto" },
+	{ Opt_nocto, "nocto" },
+	{ Opt_ac, "ac" },
+	{ Opt_noac, "noac" },
+	{ Opt_lock, "lock" },
+	{ Opt_nolock, "nolock" },
+	{ Opt_v2, "v2" },
+	{ Opt_v3, "v3" },
+	{ Opt_udp, "udp" },
+	{ Opt_tcp, "tcp" },
+	{ Opt_acl, "acl" },
+	{ Opt_noacl, "noacl" },
+	{ Opt_rdirplus, "rdirplus" },
+	{ Opt_nordirplus, "nordirplus" },
+	{ Opt_sharecache, "sharecache" },
+	{ Opt_nosharecache, "nosharecache" },
+
+	{ Opt_port, "port=%u" },
+	{ Opt_rsize, "rsize=%u" },
+	{ Opt_wsize, "wsize=%u" },
+	{ Opt_bsize, "bsize=%u" },
+	{ Opt_timeo, "timeo=%u" },
+	{ Opt_retrans, "retrans=%u" },
+	{ Opt_acregmin, "acregmin=%u" },
+	{ Opt_acregmax, "acregmax=%u" },
+	{ Opt_acdirmin, "acdirmin=%u" },
+	{ Opt_acdirmax, "acdirmax=%u" },
+	{ Opt_actimeo, "actimeo=%u" },
+	{ Opt_userspace, "retry=%u" },
+	{ Opt_namelen, "namlen=%u" },
+	{ Opt_mountport, "mountport=%u" },
+	{ Opt_mountprog, "mountprog=%u" },
+	{ Opt_mountvers, "mountvers=%u" },
+	{ Opt_nfsprog, "nfsprog=%u" },
+	{ Opt_nfsvers, "nfsvers=%u" },
+	{ Opt_nfsvers, "vers=%u" },
+
+	{ Opt_sec, "sec=%s" },
+	{ Opt_proto, "proto=%s" },
+	{ Opt_mountproto, "mountproto=%s" },
+	{ Opt_addr, "addr=%s" },
+	{ Opt_clientaddr, "clientaddr=%s" },
+	{ Opt_mounthost, "mounthost=%s" },
+
+	{ Opt_err, NULL }
+};
+
+enum {
+	Opt_xprt_udp, Opt_xprt_tcp,
+
+	Opt_xprt_err
+};
+
+static match_table_t nfs_xprt_protocol_tokens = {
+	{ Opt_xprt_udp, "udp" },
+	{ Opt_xprt_tcp, "tcp" },
+
+	{ Opt_xprt_err, NULL }
+};
+
+enum {
+	Opt_sec_none, Opt_sec_sys,
+	Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
+	Opt_sec_lkey, Opt_sec_lkeyi, Opt_sec_lkeyp,
+	Opt_sec_spkm, Opt_sec_spkmi, Opt_sec_spkmp,
+
+	Opt_sec_err
+};
+
+static match_table_t nfs_secflavor_tokens = {
+	{ Opt_sec_none, "none" },
+	{ Opt_sec_none, "null" },
+	{ Opt_sec_sys, "sys" },
+
+	{ Opt_sec_krb5, "krb5" },
+	{ Opt_sec_krb5i, "krb5i" },
+	{ Opt_sec_krb5p, "krb5p" },
+
+	{ Opt_sec_lkey, "lkey" },
+	{ Opt_sec_lkeyi, "lkeyi" },
+	{ Opt_sec_lkeyp, "lkeyp" },
+
+	{ Opt_sec_err, NULL }
+};
+
+
 static void nfs_umount_begin(struct vfsmount *, int);
 static int  nfs_statfs(struct dentry *, struct kstatfs *);
 static int  nfs_show_options(struct seq_file *, struct vfsmount *);
@@ -138,7 +300,10 @@ static const struct super_operations nfs4_sops = {
 };
 #endif
 
-static struct shrinker *acl_shrinker;
+static struct shrinker acl_shrinker = {
+	.shrink		= nfs_access_cache_shrinker,
+	.seeks		= DEFAULT_SEEKS,
+};
 
 /*
  * Register the NFS filesystems
@@ -159,7 +324,7 @@ int __init register_nfs_fs(void)
 	if (ret < 0)
 		goto error_2;
 #endif
-	acl_shrinker = set_shrinker(DEFAULT_SEEKS, nfs_access_cache_shrinker);
+	register_shrinker(&acl_shrinker);
 	return 0;
 
 #ifdef CONFIG_NFS_V4
@@ -177,8 +342,7 @@ error_0:
  */
 void __exit unregister_nfs_fs(void)
 {
-	if (acl_shrinker != NULL)
-		remove_shrinker(acl_shrinker);
+	unregister_shrinker(&acl_shrinker);
 #ifdef CONFIG_NFS_V4
 	unregister_filesystem(&nfs4_fs_type);
 	nfs_unregister_sysctl();
@@ -263,11 +427,11 @@ static const char *nfs_pseudoflavour_to_name(rpc_authflavor_t flavour)
 		{ RPC_AUTH_GSS_SPKM, "spkm" },
 		{ RPC_AUTH_GSS_SPKMI, "spkmi" },
 		{ RPC_AUTH_GSS_SPKMP, "spkmp" },
-		{ -1, "unknown" }
+		{ UINT_MAX, "unknown" }
 	};
 	int i;
 
-	for (i=0; sec_flavours[i].flavour != -1; i++) {
+	for (i = 0; sec_flavours[i].flavour != UINT_MAX; i++) {
 		if (sec_flavours[i].flavour == flavour)
 			break;
 	}
@@ -291,6 +455,7 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss,
 		{ NFS_MOUNT_NONLM, ",nolock", "" },
 		{ NFS_MOUNT_NOACL, ",noacl", "" },
 		{ NFS_MOUNT_NORDIRPLUS, ",nordirplus", "" },
+		{ NFS_MOUNT_UNSHARED, ",nosharecache", ""},
 		{ 0, NULL, NULL }
 	};
 	const struct proc_nfs_info *nfs_infop;
@@ -430,87 +595,641 @@ static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt)
  */
 static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags)
 {
+	struct nfs_server *server = NFS_SB(vfsmnt->mnt_sb);
+	struct rpc_clnt *rpc;
+
 	shrink_submounts(vfsmnt, &nfs_automount_list);
+
+	if (!(flags & MNT_FORCE))
+		return;
+	/* -EIO all pending I/O */
+	rpc = server->client_acl;
+	if (!IS_ERR(rpc))
+		rpc_killall_tasks(rpc);
+	rpc = server->client;
+	if (!IS_ERR(rpc))
+		rpc_killall_tasks(rpc);
 }
 
 /*
- * Validate the NFS2/NFS3 mount data
- * - fills in the mount root filehandle
+ * Sanity-check a server address provided by the mount command
  */
-static int nfs_validate_mount_data(struct nfs_mount_data *data,
-				   struct nfs_fh *mntfh)
+static int nfs_verify_server_address(struct sockaddr *addr)
 {
-	if (data == NULL) {
-		dprintk("%s: missing data argument\n", __FUNCTION__);
-		return -EINVAL;
+	switch (addr->sa_family) {
+	case AF_INET: {
+		struct sockaddr_in *sa = (struct sockaddr_in *) addr;
+		if (sa->sin_addr.s_addr != INADDR_ANY)
+			return 1;
+		break;
+	}
 	}
 
-	if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
-		dprintk("%s: bad mount version\n", __FUNCTION__);
-		return -EINVAL;
+	return 0;
+}
+
+/*
+ * Error-check and convert a string of mount options from user space into
+ * a data structure
+ */
+static int nfs_parse_mount_options(char *raw,
+				   struct nfs_parsed_mount_data *mnt)
+{
+	char *p, *string;
+
+	if (!raw) {
+		dfprintk(MOUNT, "NFS: mount options string was NULL.\n");
+		return 1;
 	}
+	dfprintk(MOUNT, "NFS: nfs mount opts='%s'\n", raw);
 
-	switch (data->version) {
-		case 1:
-			data->namlen = 0;
-		case 2:
-			data->bsize  = 0;
-		case 3:
-			if (data->flags & NFS_MOUNT_VER3) {
-				dprintk("%s: mount structure version %d does not support NFSv3\n",
-						__FUNCTION__,
-						data->version);
-				return -EINVAL;
+	while ((p = strsep(&raw, ",")) != NULL) {
+		substring_t args[MAX_OPT_ARGS];
+		int option, token;
+
+		if (!*p)
+			continue;
+
+		dfprintk(MOUNT, "NFS:   parsing nfs mount option '%s'\n", p);
+
+		token = match_token(p, nfs_mount_option_tokens, args);
+		switch (token) {
+		case Opt_soft:
+			mnt->flags |= NFS_MOUNT_SOFT;
+			break;
+		case Opt_hard:
+			mnt->flags &= ~NFS_MOUNT_SOFT;
+			break;
+		case Opt_intr:
+			mnt->flags |= NFS_MOUNT_INTR;
+			break;
+		case Opt_nointr:
+			mnt->flags &= ~NFS_MOUNT_INTR;
+			break;
+		case Opt_posix:
+			mnt->flags |= NFS_MOUNT_POSIX;
+			break;
+		case Opt_noposix:
+			mnt->flags &= ~NFS_MOUNT_POSIX;
+			break;
+		case Opt_cto:
+			mnt->flags &= ~NFS_MOUNT_NOCTO;
+			break;
+		case Opt_nocto:
+			mnt->flags |= NFS_MOUNT_NOCTO;
+			break;
+		case Opt_ac:
+			mnt->flags &= ~NFS_MOUNT_NOAC;
+			break;
+		case Opt_noac:
+			mnt->flags |= NFS_MOUNT_NOAC;
+			break;
+		case Opt_lock:
+			mnt->flags &= ~NFS_MOUNT_NONLM;
+			break;
+		case Opt_nolock:
+			mnt->flags |= NFS_MOUNT_NONLM;
+			break;
+		case Opt_v2:
+			mnt->flags &= ~NFS_MOUNT_VER3;
+			break;
+		case Opt_v3:
+			mnt->flags |= NFS_MOUNT_VER3;
+			break;
+		case Opt_udp:
+			mnt->flags &= ~NFS_MOUNT_TCP;
+			mnt->nfs_server.protocol = IPPROTO_UDP;
+			mnt->timeo = 7;
+			mnt->retrans = 5;
+			break;
+		case Opt_tcp:
+			mnt->flags |= NFS_MOUNT_TCP;
+			mnt->nfs_server.protocol = IPPROTO_TCP;
+			mnt->timeo = 600;
+			mnt->retrans = 2;
+			break;
+		case Opt_acl:
+			mnt->flags &= ~NFS_MOUNT_NOACL;
+			break;
+		case Opt_noacl:
+			mnt->flags |= NFS_MOUNT_NOACL;
+			break;
+		case Opt_rdirplus:
+			mnt->flags &= ~NFS_MOUNT_NORDIRPLUS;
+			break;
+		case Opt_nordirplus:
+			mnt->flags |= NFS_MOUNT_NORDIRPLUS;
+			break;
+		case Opt_sharecache:
+			mnt->flags &= ~NFS_MOUNT_UNSHARED;
+			break;
+		case Opt_nosharecache:
+			mnt->flags |= NFS_MOUNT_UNSHARED;
+			break;
+
+		case Opt_port:
+			if (match_int(args, &option))
+				return 0;
+			if (option < 0 || option > 65535)
+				return 0;
+			mnt->nfs_server.address.sin_port = htonl(option);
+			break;
+		case Opt_rsize:
+			if (match_int(args, &mnt->rsize))
+				return 0;
+			break;
+		case Opt_wsize:
+			if (match_int(args, &mnt->wsize))
+				return 0;
+			break;
+		case Opt_bsize:
+			if (match_int(args, &option))
+				return 0;
+			if (option < 0)
+				return 0;
+			mnt->bsize = option;
+			break;
+		case Opt_timeo:
+			if (match_int(args, &mnt->timeo))
+				return 0;
+			break;
+		case Opt_retrans:
+			if (match_int(args, &mnt->retrans))
+				return 0;
+			break;
+		case Opt_acregmin:
+			if (match_int(args, &mnt->acregmin))
+				return 0;
+			break;
+		case Opt_acregmax:
+			if (match_int(args, &mnt->acregmax))
+				return 0;
+			break;
+		case Opt_acdirmin:
+			if (match_int(args, &mnt->acdirmin))
+				return 0;
+			break;
+		case Opt_acdirmax:
+			if (match_int(args, &mnt->acdirmax))
+				return 0;
+			break;
+		case Opt_actimeo:
+			if (match_int(args, &option))
+				return 0;
+			if (option < 0)
+				return 0;
+			mnt->acregmin =
+			mnt->acregmax =
+			mnt->acdirmin =
+			mnt->acdirmax = option;
+			break;
+		case Opt_namelen:
+			if (match_int(args, &mnt->namlen))
+				return 0;
+			break;
+		case Opt_mountport:
+			if (match_int(args, &option))
+				return 0;
+			if (option < 0 || option > 65535)
+				return 0;
+			mnt->mount_server.port = option;
+			break;
+		case Opt_mountprog:
+			if (match_int(args, &option))
+				return 0;
+			if (option < 0)
+				return 0;
+			mnt->mount_server.program = option;
+			break;
+		case Opt_mountvers:
+			if (match_int(args, &option))
+				return 0;
+			if (option < 0)
+				return 0;
+			mnt->mount_server.version = option;
+			break;
+		case Opt_nfsprog:
+			if (match_int(args, &option))
+				return 0;
+			if (option < 0)
+				return 0;
+			mnt->nfs_server.program = option;
+			break;
+		case Opt_nfsvers:
+			if (match_int(args, &option))
+				return 0;
+			switch (option) {
+			case 2:
+				mnt->flags &= ~NFS_MOUNT_VER3;
+				break;
+			case 3:
+				mnt->flags |= NFS_MOUNT_VER3;
+				break;
+			default:
+				goto out_unrec_vers;
 			}
-			data->root.size = NFS2_FHSIZE;
-			memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
-		case 4:
-			if (data->flags & NFS_MOUNT_SECFLAVOUR) {
-				dprintk("%s: mount structure version %d does not support strong security\n",
-						__FUNCTION__,
-						data->version);
-				return -EINVAL;
+			break;
+
+		case Opt_sec:
+			string = match_strdup(args);
+			if (string == NULL)
+				goto out_nomem;
+			token = match_token(string, nfs_secflavor_tokens, args);
+			kfree(string);
+
+			/*
+			 * The flags setting is for v2/v3.  The flavor_len
+			 * setting is for v4.  v2/v3 also need to know the
+			 * difference between NULL and UNIX.
+			 */
+			switch (token) {
+			case Opt_sec_none:
+				mnt->flags &= ~NFS_MOUNT_SECFLAVOUR;
+				mnt->auth_flavor_len = 0;
+				mnt->auth_flavors[0] = RPC_AUTH_NULL;
+				break;
+			case Opt_sec_sys:
+				mnt->flags &= ~NFS_MOUNT_SECFLAVOUR;
+				mnt->auth_flavor_len = 0;
+				mnt->auth_flavors[0] = RPC_AUTH_UNIX;
+				break;
+			case Opt_sec_krb5:
+				mnt->flags |= NFS_MOUNT_SECFLAVOUR;
+				mnt->auth_flavor_len = 1;
+				mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5;
+				break;
+			case Opt_sec_krb5i:
+				mnt->flags |= NFS_MOUNT_SECFLAVOUR;
+				mnt->auth_flavor_len = 1;
+				mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5I;
+				break;
+			case Opt_sec_krb5p:
+				mnt->flags |= NFS_MOUNT_SECFLAVOUR;
+				mnt->auth_flavor_len = 1;
+				mnt->auth_flavors[0] = RPC_AUTH_GSS_KRB5P;
+				break;
+			case Opt_sec_lkey:
+				mnt->flags |= NFS_MOUNT_SECFLAVOUR;
+				mnt->auth_flavor_len = 1;
+				mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEY;
+				break;
+			case Opt_sec_lkeyi:
+				mnt->flags |= NFS_MOUNT_SECFLAVOUR;
+				mnt->auth_flavor_len = 1;
+				mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYI;
+				break;
+			case Opt_sec_lkeyp:
+				mnt->flags |= NFS_MOUNT_SECFLAVOUR;
+				mnt->auth_flavor_len = 1;
+				mnt->auth_flavors[0] = RPC_AUTH_GSS_LKEYP;
+				break;
+			case Opt_sec_spkm:
+				mnt->flags |= NFS_MOUNT_SECFLAVOUR;
+				mnt->auth_flavor_len = 1;
+				mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKM;
+				break;
+			case Opt_sec_spkmi:
+				mnt->flags |= NFS_MOUNT_SECFLAVOUR;
+				mnt->auth_flavor_len = 1;
+				mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMI;
+				break;
+			case Opt_sec_spkmp:
+				mnt->flags |= NFS_MOUNT_SECFLAVOUR;
+				mnt->auth_flavor_len = 1;
+				mnt->auth_flavors[0] = RPC_AUTH_GSS_SPKMP;
+				break;
+			default:
+				goto out_unrec_sec;
 			}
-		case 5:
-			memset(data->context, 0, sizeof(data->context));
-	}
+			break;
+		case Opt_proto:
+			string = match_strdup(args);
+			if (string == NULL)
+				goto out_nomem;
+			token = match_token(string,
+					    nfs_xprt_protocol_tokens, args);
+			kfree(string);
+
+			switch (token) {
+			case Opt_udp:
+				mnt->flags &= ~NFS_MOUNT_TCP;
+				mnt->nfs_server.protocol = IPPROTO_UDP;
+				mnt->timeo = 7;
+				mnt->retrans = 5;
+				break;
+			case Opt_tcp:
+				mnt->flags |= NFS_MOUNT_TCP;
+				mnt->nfs_server.protocol = IPPROTO_TCP;
+				mnt->timeo = 600;
+				mnt->retrans = 2;
+				break;
+			default:
+				goto out_unrec_xprt;
+			}
+			break;
+		case Opt_mountproto:
+			string = match_strdup(args);
+			if (string == NULL)
+				goto out_nomem;
+			token = match_token(string,
+					    nfs_xprt_protocol_tokens, args);
+			kfree(string);
+
+			switch (token) {
+			case Opt_udp:
+				mnt->mount_server.protocol = IPPROTO_UDP;
+				break;
+			case Opt_tcp:
+				mnt->mount_server.protocol = IPPROTO_TCP;
+				break;
+			default:
+				goto out_unrec_xprt;
+			}
+			break;
+		case Opt_addr:
+			string = match_strdup(args);
+			if (string == NULL)
+				goto out_nomem;
+			mnt->nfs_server.address.sin_family = AF_INET;
+			mnt->nfs_server.address.sin_addr.s_addr =
+							in_aton(string);
+			kfree(string);
+			break;
+		case Opt_clientaddr:
+			string = match_strdup(args);
+			if (string == NULL)
+				goto out_nomem;
+			mnt->client_address = string;
+			break;
+		case Opt_mounthost:
+			string = match_strdup(args);
+			if (string == NULL)
+				goto out_nomem;
+			mnt->mount_server.address.sin_family = AF_INET;
+			mnt->mount_server.address.sin_addr.s_addr =
+							in_aton(string);
+			kfree(string);
+			break;
 
-	/* Set the pseudoflavor */
-	if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
-		data->pseudoflavor = RPC_AUTH_UNIX;
+		case Opt_userspace:
+		case Opt_deprecated:
+			break;
 
-#ifndef CONFIG_NFS_V3
-	/* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
-	if (data->flags & NFS_MOUNT_VER3) {
-		dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
-		return -EPROTONOSUPPORT;
+		default:
+			goto out_unknown;
+		}
 	}
-#endif /* CONFIG_NFS_V3 */
 
-	/* We now require that the mount process passes the remote address */
-	if (data->addr.sin_addr.s_addr == INADDR_ANY) {
-		dprintk("%s: mount program didn't pass remote address!\n",
-			__FUNCTION__);
-		return -EINVAL;
+	return 1;
+
+out_nomem:
+	printk(KERN_INFO "NFS: not enough memory to parse option\n");
+	return 0;
+
+out_unrec_vers:
+	printk(KERN_INFO "NFS: unrecognized NFS version number\n");
+	return 0;
+
+out_unrec_xprt:
+	printk(KERN_INFO "NFS: unrecognized transport protocol\n");
+	return 0;
+
+out_unrec_sec:
+	printk(KERN_INFO "NFS: unrecognized security flavor\n");
+	return 0;
+
+out_unknown:
+	printk(KERN_INFO "NFS: unknown mount option: %s\n", p);
+	return 0;
+}
+
+/*
+ * Use the remote server's MOUNT service to request the NFS file handle
+ * corresponding to the provided path.
+ */
+static int nfs_try_mount(struct nfs_parsed_mount_data *args,
+			 struct nfs_fh *root_fh)
+{
+	struct sockaddr_in sin;
+	int status;
+
+	if (args->mount_server.version == 0) {
+		if (args->flags & NFS_MOUNT_VER3)
+			args->mount_server.version = NFS_MNT3_VERSION;
+		else
+			args->mount_server.version = NFS_MNT_VERSION;
 	}
 
-	/* Prepare the root filehandle */
-	if (data->flags & NFS_MOUNT_VER3)
-		mntfh->size = data->root.size;
+	/*
+	 * Construct the mount server's address.
+	 */
+	if (args->mount_server.address.sin_addr.s_addr != INADDR_ANY)
+		sin = args->mount_server.address;
 	else
-		mntfh->size = NFS2_FHSIZE;
+		sin = args->nfs_server.address;
+	if (args->mount_server.port == 0) {
+		status = rpcb_getport_sync(&sin,
+					   args->mount_server.program,
+					   args->mount_server.version,
+					   args->mount_server.protocol);
+		if (status < 0)
+			goto out_err;
+		sin.sin_port = htons(status);
+	} else
+		sin.sin_port = htons(args->mount_server.port);
+
+	/*
+	 * Now ask the mount server to map our export path
+	 * to a file handle.
+	 */
+	status = nfs_mount((struct sockaddr *) &sin,
+			   sizeof(sin),
+			   args->nfs_server.hostname,
+			   args->nfs_server.export_path,
+			   args->mount_server.version,
+			   args->mount_server.protocol,
+			   root_fh);
+	if (status < 0)
+		goto out_err;
+
+	return status;
 
-	if (mntfh->size > sizeof(mntfh->data)) {
-		dprintk("%s: invalid root filehandle\n", __FUNCTION__);
-		return -EINVAL;
+out_err:
+	dfprintk(MOUNT, "NFS: unable to contact server on host "
+		 NIPQUAD_FMT "\n", NIPQUAD(sin.sin_addr.s_addr));
+	return status;
+}
+
+/*
+ * Validate the NFS2/NFS3 mount data
+ * - fills in the mount root filehandle
+ *
+ * For option strings, user space handles the following behaviors:
+ *
+ * + DNS: mapping server host name to IP address ("addr=" option)
+ *
+ * + failure mode: how to behave if a mount request can't be handled
+ *   immediately ("fg/bg" option)
+ *
+ * + retry: how often to retry a mount request ("retry=" option)
+ *
+ * + breaking back: trying proto=udp after proto=tcp, v2 after v3,
+ *   mountproto=tcp after mountproto=udp, and so on
+ *
+ * XXX: as far as I can tell, changing the NFS program number is not
+ *      supported in the NFS client.
+ */
+static int nfs_validate_mount_data(struct nfs_mount_data **options,
+				   struct nfs_fh *mntfh,
+				   const char *dev_name)
+{
+	struct nfs_mount_data *data = *options;
+
+	if (data == NULL)
+		goto out_no_data;
+
+	switch (data->version) {
+	case 1:
+		data->namlen = 0;
+	case 2:
+		data->bsize = 0;
+	case 3:
+		if (data->flags & NFS_MOUNT_VER3)
+			goto out_no_v3;
+		data->root.size = NFS2_FHSIZE;
+		memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
+	case 4:
+		if (data->flags & NFS_MOUNT_SECFLAVOUR)
+			goto out_no_sec;
+	case 5:
+		memset(data->context, 0, sizeof(data->context));
+	case 6:
+		if (data->flags & NFS_MOUNT_VER3)
+			mntfh->size = data->root.size;
+		else
+			mntfh->size = NFS2_FHSIZE;
+
+		if (mntfh->size > sizeof(mntfh->data))
+			goto out_invalid_fh;
+
+		memcpy(mntfh->data, data->root.data, mntfh->size);
+		if (mntfh->size < sizeof(mntfh->data))
+			memset(mntfh->data + mntfh->size, 0,
+			       sizeof(mntfh->data) - mntfh->size);
+		break;
+	default: {
+		unsigned int len;
+		char *c;
+		int status;
+		struct nfs_parsed_mount_data args = {
+			.flags		= (NFS_MOUNT_VER3 | NFS_MOUNT_TCP),
+			.rsize		= NFS_MAX_FILE_IO_SIZE,
+			.wsize		= NFS_MAX_FILE_IO_SIZE,
+			.timeo		= 600,
+			.retrans	= 2,
+			.acregmin	= 3,
+			.acregmax	= 60,
+			.acdirmin	= 30,
+			.acdirmax	= 60,
+			.mount_server.protocol = IPPROTO_UDP,
+			.mount_server.program = NFS_MNT_PROGRAM,
+			.nfs_server.protocol = IPPROTO_TCP,
+			.nfs_server.program = NFS_PROGRAM,
+		};
+
+		if (nfs_parse_mount_options((char *) *options, &args) == 0)
+			return -EINVAL;
+
+		data = kzalloc(sizeof(*data), GFP_KERNEL);
+		if (data == NULL)
+			return -ENOMEM;
+
+		/*
+		 * NB: after this point, caller will free "data"
+		 * if we return an error
+		 */
+		*options = data;
+
+		c = strchr(dev_name, ':');
+		if (c == NULL)
+			return -EINVAL;
+		len = c - dev_name - 1;
+		if (len > sizeof(data->hostname))
+			return -EINVAL;
+		strncpy(data->hostname, dev_name, len);
+		args.nfs_server.hostname = data->hostname;
+
+		c++;
+		if (strlen(c) > NFS_MAXPATHLEN)
+			return -EINVAL;
+		args.nfs_server.export_path = c;
+
+		status = nfs_try_mount(&args, mntfh);
+		if (status)
+			return -EINVAL;
+
+		/*
+		 * Translate to nfs_mount_data, which nfs_fill_super
+		 * can deal with.
+		 */
+		data->version		= 6;
+		data->flags		= args.flags;
+		data->rsize		= args.rsize;
+		data->wsize		= args.wsize;
+		data->timeo		= args.timeo;
+		data->retrans		= args.retrans;
+		data->acregmin		= args.acregmin;
+		data->acregmax		= args.acregmax;
+		data->acdirmin		= args.acdirmin;
+		data->acdirmax		= args.acdirmax;
+		data->addr		= args.nfs_server.address;
+		data->namlen		= args.namlen;
+		data->bsize		= args.bsize;
+		data->pseudoflavor	= args.auth_flavors[0];
+
+		break;
+		}
 	}
 
-	memcpy(mntfh->data, data->root.data, mntfh->size);
-	if (mntfh->size < sizeof(mntfh->data))
-		memset(mntfh->data + mntfh->size, 0,
-		       sizeof(mntfh->data) - mntfh->size);
+	if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
+		data->pseudoflavor = RPC_AUTH_UNIX;
+
+#ifndef CONFIG_NFS_V3
+	if (data->flags & NFS_MOUNT_VER3)
+		goto out_v3_not_compiled;
+#endif /* !CONFIG_NFS_V3 */
+
+	if (!nfs_verify_server_address((struct sockaddr *) &data->addr))
+		goto out_no_address;
 
 	return 0;
+
+out_no_data:
+	dfprintk(MOUNT, "NFS: mount program didn't pass any mount data\n");
+	return -EINVAL;
+
+out_no_v3:
+	dfprintk(MOUNT, "NFS: nfs_mount_data version %d does not support v3\n",
+		 data->version);
+	return -EINVAL;
+
+out_no_sec:
+	dfprintk(MOUNT, "NFS: nfs_mount_data version supports only AUTH_SYS\n");
+	return -EINVAL;
+
+#ifndef CONFIG_NFS_V3
+out_v3_not_compiled:
+	dfprintk(MOUNT, "NFS: NFSv3 is not compiled into kernel\n");
+	return -EPROTONOSUPPORT;
+#endif /* !CONFIG_NFS_V3 */
+
+out_no_address:
+	dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n");
+	return -EINVAL;
+
+out_invalid_fh:
+	dfprintk(MOUNT, "NFS: invalid root filehandle\n");
+	return -EINVAL;
 }
 
 /*
@@ -600,13 +1319,51 @@ static int nfs_compare_super(struct super_block *sb, void *data)
 {
 	struct nfs_server *server = data, *old = NFS_SB(sb);
 
-	if (old->nfs_client != server->nfs_client)
+	if (memcmp(&old->nfs_client->cl_addr,
+				&server->nfs_client->cl_addr,
+				sizeof(old->nfs_client->cl_addr)) != 0)
+		return 0;
+	/* Note: NFS_MOUNT_UNSHARED == NFS4_MOUNT_UNSHARED */
+	if (old->flags & NFS_MOUNT_UNSHARED)
 		return 0;
 	if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0)
 		return 0;
 	return 1;
 }
 
+#define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)
+
+static int nfs_compare_mount_options(const struct super_block *s, const struct nfs_server *b, int flags)
+{
+	const struct nfs_server *a = s->s_fs_info;
+	const struct rpc_clnt *clnt_a = a->client;
+	const struct rpc_clnt *clnt_b = b->client;
+
+	if ((s->s_flags & NFS_MS_MASK) != (flags & NFS_MS_MASK))
+		goto Ebusy;
+	if (a->nfs_client != b->nfs_client)
+		goto Ebusy;
+	if (a->flags != b->flags)
+		goto Ebusy;
+	if (a->wsize != b->wsize)
+		goto Ebusy;
+	if (a->rsize != b->rsize)
+		goto Ebusy;
+	if (a->acregmin != b->acregmin)
+		goto Ebusy;
+	if (a->acregmax != b->acregmax)
+		goto Ebusy;
+	if (a->acdirmin != b->acdirmin)
+		goto Ebusy;
+	if (a->acdirmax != b->acdirmax)
+		goto Ebusy;
+	if (clnt_a->cl_auth->au_flavor != clnt_b->cl_auth->au_flavor)
+		goto Ebusy;
+	return 0;
+Ebusy:
+	return -EBUSY;
+}
+
 static int nfs_get_sb(struct file_system_type *fs_type,
 	int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
 {
@@ -615,30 +1372,37 @@ static int nfs_get_sb(struct file_system_type *fs_type,
 	struct nfs_fh mntfh;
 	struct nfs_mount_data *data = raw_data;
 	struct dentry *mntroot;
+	int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
 	int error;
 
 	/* Validate the mount data */
-	error = nfs_validate_mount_data(data, &mntfh);
+	error = nfs_validate_mount_data(&data, &mntfh, dev_name);
 	if (error < 0)
-		return error;
+		goto out;
 
 	/* Get a volume representation */
 	server = nfs_create_server(data, &mntfh);
 	if (IS_ERR(server)) {
 		error = PTR_ERR(server);
-		goto out_err_noserver;
+		goto out;
 	}
 
+	if (server->flags & NFS_MOUNT_UNSHARED)
+		compare_super = NULL;
+
 	/* Get a superblock - note that we may end up sharing one that already exists */
-	s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
+	s = sget(fs_type, compare_super, nfs_set_super, server);
 	if (IS_ERR(s)) {
 		error = PTR_ERR(s);
 		goto out_err_nosb;
 	}
 
 	if (s->s_fs_info != server) {
+		error = nfs_compare_mount_options(s, server, flags);
 		nfs_free_server(server);
 		server = NULL;
+		if (error < 0)
+			goto error_splat_super;
 	}
 
 	if (!s->s_root) {
@@ -656,17 +1420,21 @@ static int nfs_get_sb(struct file_system_type *fs_type,
 	s->s_flags |= MS_ACTIVE;
 	mnt->mnt_sb = s;
 	mnt->mnt_root = mntroot;
-	return 0;
+	error = 0;
+
+out:
+	if (data != raw_data)
+		kfree(data);
+	return error;
 
 out_err_nosb:
 	nfs_free_server(server);
-out_err_noserver:
-	return error;
+	goto out;
 
 error_splat_super:
 	up_write(&s->s_umount);
 	deactivate_super(s);
-	return error;
+	goto out;
 }
 
 /*
@@ -691,6 +1459,7 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
 	struct super_block *s;
 	struct nfs_server *server;
 	struct dentry *mntroot;
+	int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
 	int error;
 
 	dprintk("--> nfs_xdev_get_sb()\n");
@@ -702,16 +1471,22 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
 		goto out_err_noserver;
 	}
 
+	if (server->flags & NFS_MOUNT_UNSHARED)
+		compare_super = NULL;
+
 	/* Get a superblock - note that we may end up sharing one that already exists */
-	s = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+	s = sget(&nfs_fs_type, compare_super, nfs_set_super, server);
 	if (IS_ERR(s)) {
 		error = PTR_ERR(s);
 		goto out_err_nosb;
 	}
 
 	if (s->s_fs_info != server) {
+		error = nfs_compare_mount_options(s, server, flags);
 		nfs_free_server(server);
 		server = NULL;
+		if (error < 0)
+			goto error_splat_super;
 	}
 
 	if (!s->s_root) {
@@ -772,25 +1547,164 @@ static void nfs4_fill_super(struct super_block *sb)
 	nfs_initialise_sb(sb);
 }
 
-static void *nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
+/*
+ * Validate NFSv4 mount options
+ */
+static int nfs4_validate_mount_data(struct nfs4_mount_data **options,
+				    const char *dev_name,
+				    struct sockaddr_in *addr,
+				    rpc_authflavor_t *authflavour,
+				    char **hostname,
+				    char **mntpath,
+				    char **ip_addr)
 {
-	void *p = NULL;
-
-	if (!src->len)
-		return ERR_PTR(-EINVAL);
-	if (src->len < maxlen)
-		maxlen = src->len;
-	if (dst == NULL) {
-		p = dst = kmalloc(maxlen + 1, GFP_KERNEL);
-		if (p == NULL)
-			return ERR_PTR(-ENOMEM);
-	}
-	if (copy_from_user(dst, src->data, maxlen)) {
-		kfree(p);
-		return ERR_PTR(-EFAULT);
+	struct nfs4_mount_data *data = *options;
+	char *c;
+
+	if (data == NULL)
+		goto out_no_data;
+
+	switch (data->version) {
+	case 1:
+		if (data->host_addrlen != sizeof(*addr))
+			goto out_no_address;
+		if (copy_from_user(addr, data->host_addr, sizeof(*addr)))
+			return -EFAULT;
+		if (addr->sin_port == 0)
+			addr->sin_port = htons(NFS_PORT);
+		if (!nfs_verify_server_address((struct sockaddr *) addr))
+			goto out_no_address;
+
+		switch (data->auth_flavourlen) {
+		case 0:
+			*authflavour = RPC_AUTH_UNIX;
+			break;
+		case 1:
+			if (copy_from_user(authflavour, data->auth_flavours,
+					   sizeof(*authflavour)))
+				return -EFAULT;
+			break;
+		default:
+			goto out_inval_auth;
+		}
+
+		c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN);
+		if (IS_ERR(c))
+			return PTR_ERR(c);
+		*hostname = c;
+
+		c = strndup_user(data->mnt_path.data, NFS4_MAXPATHLEN);
+		if (IS_ERR(c))
+			return PTR_ERR(c);
+		*mntpath = c;
+		dfprintk(MOUNT, "NFS: MNTPATH: '%s'\n", *mntpath);
+
+		c = strndup_user(data->client_addr.data, 16);
+		if (IS_ERR(c))
+			return PTR_ERR(c);
+		*ip_addr = c;
+
+		break;
+	default: {
+		unsigned int len;
+		struct nfs_parsed_mount_data args = {
+			.rsize		= NFS_MAX_FILE_IO_SIZE,
+			.wsize		= NFS_MAX_FILE_IO_SIZE,
+			.timeo		= 600,
+			.retrans	= 2,
+			.acregmin	= 3,
+			.acregmax	= 60,
+			.acdirmin	= 30,
+			.acdirmax	= 60,
+			.nfs_server.protocol = IPPROTO_TCP,
+		};
+
+		if (nfs_parse_mount_options((char *) *options, &args) == 0)
+			return -EINVAL;
+
+		if (!nfs_verify_server_address((struct sockaddr *)
+						&args.nfs_server.address))
+			return -EINVAL;
+		*addr = args.nfs_server.address;
+
+		switch (args.auth_flavor_len) {
+		case 0:
+			*authflavour = RPC_AUTH_UNIX;
+			break;
+		case 1:
+			*authflavour = (rpc_authflavor_t) args.auth_flavors[0];
+			break;
+		default:
+			goto out_inval_auth;
+		}
+
+		/*
+		 * Translate to nfs4_mount_data, which nfs4_fill_super
+		 * can deal with.
+		 */
+		data = kzalloc(sizeof(*data), GFP_KERNEL);
+		if (data == NULL)
+			return -ENOMEM;
+		*options = data;
+
+		data->version	= 1;
+		data->flags	= args.flags & NFS4_MOUNT_FLAGMASK;
+		data->rsize	= args.rsize;
+		data->wsize	= args.wsize;
+		data->timeo	= args.timeo;
+		data->retrans	= args.retrans;
+		data->acregmin	= args.acregmin;
+		data->acregmax	= args.acregmax;
+		data->acdirmin	= args.acdirmin;
+		data->acdirmax	= args.acdirmax;
+		data->proto	= args.nfs_server.protocol;
+
+		/*
+		 * Split "dev_name" into "hostname:mntpath".
+		 */
+		c = strchr(dev_name, ':');
+		if (c == NULL)
+			return -EINVAL;
+		/* while calculating len, pretend ':' is '\0' */
+		len = c - dev_name;
+		if (len > NFS4_MAXNAMLEN)
+			return -EINVAL;
+		*hostname = kzalloc(len, GFP_KERNEL);
+		if (*hostname == NULL)
+			return -ENOMEM;
+		strncpy(*hostname, dev_name, len - 1);
+
+		c++;			/* step over the ':' */
+		len = strlen(c);
+		if (len > NFS4_MAXPATHLEN)
+			return -EINVAL;
+		*mntpath = kzalloc(len + 1, GFP_KERNEL);
+		if (*mntpath == NULL)
+			return -ENOMEM;
+		strncpy(*mntpath, c, len);
+
+		dprintk("MNTPATH: %s\n", *mntpath);
+
+		*ip_addr = args.client_address;
+
+		break;
+		}
 	}
-	dst[maxlen] = '\0';
-	return dst;
+
+	return 0;
+
+out_no_data:
+	dfprintk(MOUNT, "NFS4: mount program didn't pass any mount data\n");
+	return -EINVAL;
+
+out_inval_auth:
+	dfprintk(MOUNT, "NFS4: Invalid number of RPC auth flavours %d\n",
+		 data->auth_flavourlen);
+	return -EINVAL;
+
+out_no_address:
+	dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n");
+	return -EINVAL;
 }
 
 /*
@@ -806,81 +1720,29 @@ static int nfs4_get_sb(struct file_system_type *fs_type,
 	rpc_authflavor_t authflavour;
 	struct nfs_fh mntfh;
 	struct dentry *mntroot;
-	char *mntpath = NULL, *hostname = NULL, ip_addr[16];
-	void *p;
+	char *mntpath = NULL, *hostname = NULL, *ip_addr = NULL;
+	int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
 	int error;
 
-	if (data == NULL) {
-		dprintk("%s: missing data argument\n", __FUNCTION__);
-		return -EINVAL;
-	}
-	if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) {
-		dprintk("%s: bad mount version\n", __FUNCTION__);
-		return -EINVAL;
-	}
-
-	/* We now require that the mount process passes the remote address */
-	if (data->host_addrlen != sizeof(addr))
-		return -EINVAL;
-
-	if (copy_from_user(&addr, data->host_addr, sizeof(addr)))
-		return -EFAULT;
-
-	if (addr.sin_family != AF_INET ||
-	    addr.sin_addr.s_addr == INADDR_ANY
-	    ) {
-		dprintk("%s: mount program didn't pass remote IP address!\n",
-				__FUNCTION__);
-		return -EINVAL;
-	}
-	/* RFC3530: The default port for NFS is 2049 */
-	if (addr.sin_port == 0)
-		addr.sin_port = htons(NFS_PORT);
-
-	/* Grab the authentication type */
-	authflavour = RPC_AUTH_UNIX;
-	if (data->auth_flavourlen != 0) {
-		if (data->auth_flavourlen != 1) {
-			dprintk("%s: Invalid number of RPC auth flavours %d.\n",
-					__FUNCTION__, data->auth_flavourlen);
-			error = -EINVAL;
-			goto out_err_noserver;
-		}
-
-		if (copy_from_user(&authflavour, data->auth_flavours,
-				   sizeof(authflavour))) {
-			error = -EFAULT;
-			goto out_err_noserver;
-		}
-	}
-
-	p = nfs_copy_user_string(NULL, &data->hostname, 256);
-	if (IS_ERR(p))
-		goto out_err;
-	hostname = p;
-
-	p = nfs_copy_user_string(NULL, &data->mnt_path, 1024);
-	if (IS_ERR(p))
-		goto out_err;
-	mntpath = p;
-
-	dprintk("MNTPATH: %s\n", mntpath);
-
-	p = nfs_copy_user_string(ip_addr, &data->client_addr,
-				 sizeof(ip_addr) - 1);
-	if (IS_ERR(p))
-		goto out_err;
+	/* Validate the mount data */
+	error = nfs4_validate_mount_data(&data, dev_name, &addr, &authflavour,
+					 &hostname, &mntpath, &ip_addr);
+	if (error < 0)
+		goto out;
 
 	/* Get a volume representation */
 	server = nfs4_create_server(data, hostname, &addr, mntpath, ip_addr,
 				    authflavour, &mntfh);
 	if (IS_ERR(server)) {
 		error = PTR_ERR(server);
-		goto out_err_noserver;
+		goto out;
 	}
 
+	if (server->flags & NFS4_MOUNT_UNSHARED)
+		compare_super = NULL;
+
 	/* Get a superblock - note that we may end up sharing one that already exists */
-	s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
+	s = sget(fs_type, compare_super, nfs_set_super, server);
 	if (IS_ERR(s)) {
 		error = PTR_ERR(s);
 		goto out_free;
@@ -906,25 +1768,22 @@ static int nfs4_get_sb(struct file_system_type *fs_type,
 	s->s_flags |= MS_ACTIVE;
 	mnt->mnt_sb = s;
 	mnt->mnt_root = mntroot;
+	error = 0;
+
+out:
+	kfree(ip_addr);
 	kfree(mntpath);
 	kfree(hostname);
-	return 0;
-
-out_err:
-	error = PTR_ERR(p);
-	goto out_err_noserver;
+	return error;
 
 out_free:
 	nfs_free_server(server);
-out_err_noserver:
-	kfree(mntpath);
-	kfree(hostname);
-	return error;
+	goto out;
 
 error_splat_super:
 	up_write(&s->s_umount);
 	deactivate_super(s);
-	goto out_err_noserver;
+	goto out;
 }
 
 static void nfs4_kill_super(struct super_block *sb)
@@ -949,6 +1808,7 @@ static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags,
 	struct super_block *s;
 	struct nfs_server *server;
 	struct dentry *mntroot;
+	int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
 	int error;
 
 	dprintk("--> nfs4_xdev_get_sb()\n");
@@ -960,8 +1820,11 @@ static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags,
 		goto out_err_noserver;
 	}
 
+	if (server->flags & NFS4_MOUNT_UNSHARED)
+		compare_super = NULL;
+
 	/* Get a superblock - note that we may end up sharing one that already exists */
-	s = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+	s = sget(&nfs_fs_type, compare_super, nfs_set_super, server);
 	if (IS_ERR(s)) {
 		error = PTR_ERR(s);
 		goto out_err_nosb;
@@ -1016,6 +1879,7 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type, int flags,
 	struct nfs_server *server;
 	struct dentry *mntroot;
 	struct nfs_fh mntfh;
+	int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
 	int error;
 
 	dprintk("--> nfs4_referral_get_sb()\n");
@@ -1027,8 +1891,11 @@ static int nfs4_referral_get_sb(struct file_system_type *fs_type, int flags,
 		goto out_err_noserver;
 	}
 
+	if (server->flags & NFS4_MOUNT_UNSHARED)
+		compare_super = NULL;
+
 	/* Get a superblock - note that we may end up sharing one that already exists */
-	s = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+	s = sget(&nfs_fs_type, compare_super, nfs_set_super, server);
 	if (IS_ERR(s)) {
 		error = PTR_ERR(s);
 		goto out_err_nosb;
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index af344a15..73ac992 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -117,19 +117,19 @@ static struct nfs_page *nfs_page_find_request_locked(struct page *page)
 	if (PagePrivate(page)) {
 		req = (struct nfs_page *)page_private(page);
 		if (req != NULL)
-			atomic_inc(&req->wb_count);
+			kref_get(&req->wb_kref);
 	}
 	return req;
 }
 
 static struct nfs_page *nfs_page_find_request(struct page *page)
 {
+	struct inode *inode = page->mapping->host;
 	struct nfs_page *req = NULL;
-	spinlock_t *req_lock = &NFS_I(page->mapping->host)->req_lock;
 
-	spin_lock(req_lock);
+	spin_lock(&inode->i_lock);
 	req = nfs_page_find_request_locked(page);
-	spin_unlock(req_lock);
+	spin_unlock(&inode->i_lock);
 	return req;
 }
 
@@ -191,8 +191,6 @@ static int nfs_writepage_setup(struct nfs_open_context *ctx, struct page *page,
 	}
 	/* Update file length */
 	nfs_grow_file(page, offset, count);
-	/* Set the PG_uptodate flag? */
-	nfs_mark_uptodate(page, offset, count);
 	nfs_unlock_request(req);
 	return 0;
 }
@@ -253,16 +251,16 @@ static void nfs_end_page_writeback(struct page *page)
 static int nfs_page_async_flush(struct nfs_pageio_descriptor *pgio,
 				struct page *page)
 {
+	struct inode *inode = page->mapping->host;
+	struct nfs_inode *nfsi = NFS_I(inode);
 	struct nfs_page *req;
-	struct nfs_inode *nfsi = NFS_I(page->mapping->host);
-	spinlock_t *req_lock = &nfsi->req_lock;
 	int ret;
 
-	spin_lock(req_lock);
+	spin_lock(&inode->i_lock);
 	for(;;) {
 		req = nfs_page_find_request_locked(page);
 		if (req == NULL) {
-			spin_unlock(req_lock);
+			spin_unlock(&inode->i_lock);
 			return 1;
 		}
 		if (nfs_lock_request_dontget(req))
@@ -272,28 +270,28 @@ static int nfs_page_async_flush(struct nfs_pageio_descriptor *pgio,
 		 *	 succeed provided that someone hasn't already marked the
 		 *	 request as dirty (in which case we don't care).
 		 */
-		spin_unlock(req_lock);
+		spin_unlock(&inode->i_lock);
 		ret = nfs_wait_on_request(req);
 		nfs_release_request(req);
 		if (ret != 0)
 			return ret;
-		spin_lock(req_lock);
+		spin_lock(&inode->i_lock);
 	}
 	if (test_bit(PG_NEED_COMMIT, &req->wb_flags)) {
 		/* This request is marked for commit */
-		spin_unlock(req_lock);
+		spin_unlock(&inode->i_lock);
 		nfs_unlock_request(req);
 		nfs_pageio_complete(pgio);
 		return 1;
 	}
 	if (nfs_set_page_writeback(page) != 0) {
-		spin_unlock(req_lock);
+		spin_unlock(&inode->i_lock);
 		BUG();
 	}
 	radix_tree_tag_set(&nfsi->nfs_page_tree, req->wb_index,
-			NFS_PAGE_TAG_WRITEBACK);
+			NFS_PAGE_TAG_LOCKED);
 	ret = test_bit(PG_NEED_FLUSH, &req->wb_flags);
-	spin_unlock(req_lock);
+	spin_unlock(&inode->i_lock);
 	nfs_pageio_add_request(pgio, req);
 	return ret;
 }
@@ -400,7 +398,7 @@ static int nfs_inode_add_request(struct inode *inode, struct nfs_page *req)
 	if (PageDirty(req->wb_page))
 		set_bit(PG_NEED_FLUSH, &req->wb_flags);
 	nfsi->npages++;
-	atomic_inc(&req->wb_count);
+	kref_get(&req->wb_kref);
 	return 0;
 }
 
@@ -409,12 +407,12 @@ static int nfs_inode_add_request(struct inode *inode, struct nfs_page *req)
  */
 static void nfs_inode_remove_request(struct nfs_page *req)
 {
-	struct inode *inode = req->wb_context->dentry->d_inode;
+	struct inode *inode = req->wb_context->path.dentry->d_inode;
 	struct nfs_inode *nfsi = NFS_I(inode);
 
 	BUG_ON (!NFS_WBACK_BUSY(req));
 
-	spin_lock(&nfsi->req_lock);
+	spin_lock(&inode->i_lock);
 	set_page_private(req->wb_page, 0);
 	ClearPagePrivate(req->wb_page);
 	radix_tree_delete(&nfsi->nfs_page_tree, req->wb_index);
@@ -422,11 +420,11 @@ static void nfs_inode_remove_request(struct nfs_page *req)
 		__set_page_dirty_nobuffers(req->wb_page);
 	nfsi->npages--;
 	if (!nfsi->npages) {
-		spin_unlock(&nfsi->req_lock);
+		spin_unlock(&inode->i_lock);
 		nfs_end_data_update(inode);
 		iput(inode);
 	} else
-		spin_unlock(&nfsi->req_lock);
+		spin_unlock(&inode->i_lock);
 	nfs_clear_request(req);
 	nfs_release_request(req);
 }
@@ -457,14 +455,16 @@ nfs_dirty_request(struct nfs_page *req)
 static void
 nfs_mark_request_commit(struct nfs_page *req)
 {
-	struct inode *inode = req->wb_context->dentry->d_inode;
+	struct inode *inode = req->wb_context->path.dentry->d_inode;
 	struct nfs_inode *nfsi = NFS_I(inode);
 
-	spin_lock(&nfsi->req_lock);
-	nfs_list_add_request(req, &nfsi->commit);
+	spin_lock(&inode->i_lock);
 	nfsi->ncommit++;
 	set_bit(PG_NEED_COMMIT, &(req)->wb_flags);
-	spin_unlock(&nfsi->req_lock);
+	radix_tree_tag_set(&nfsi->nfs_page_tree,
+			req->wb_index,
+			NFS_PAGE_TAG_COMMIT);
+	spin_unlock(&inode->i_lock);
 	inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
 	__mark_inode_dirty(inode, I_DIRTY_DATASYNC);
 }
@@ -526,18 +526,18 @@ static int nfs_wait_on_requests_locked(struct inode *inode, pgoff_t idx_start, u
 		idx_end = idx_start + npages - 1;
 
 	next = idx_start;
-	while (radix_tree_gang_lookup_tag(&nfsi->nfs_page_tree, (void **)&req, next, 1, NFS_PAGE_TAG_WRITEBACK)) {
+	while (radix_tree_gang_lookup_tag(&nfsi->nfs_page_tree, (void **)&req, next, 1, NFS_PAGE_TAG_LOCKED)) {
 		if (req->wb_index > idx_end)
 			break;
 
 		next = req->wb_index + 1;
 		BUG_ON(!NFS_WBACK_BUSY(req));
 
-		atomic_inc(&req->wb_count);
-		spin_unlock(&nfsi->req_lock);
+		kref_get(&req->wb_kref);
+		spin_unlock(&inode->i_lock);
 		error = nfs_wait_on_request(req);
 		nfs_release_request(req);
-		spin_lock(&nfsi->req_lock);
+		spin_lock(&inode->i_lock);
 		if (error < 0)
 			return error;
 		res++;
@@ -577,10 +577,9 @@ nfs_scan_commit(struct inode *inode, struct list_head *dst, pgoff_t idx_start, u
 	int res = 0;
 
 	if (nfsi->ncommit != 0) {
-		res = nfs_scan_list(nfsi, &nfsi->commit, dst, idx_start, npages);
+		res = nfs_scan_list(nfsi, dst, idx_start, npages,
+				NFS_PAGE_TAG_COMMIT);
 		nfsi->ncommit -= res;
-		if ((nfsi->ncommit == 0) != list_empty(&nfsi->commit))
-			printk(KERN_ERR "NFS: desynchronized value of nfs_i.ncommit.\n");
 	}
 	return res;
 }
@@ -603,7 +602,6 @@ static struct nfs_page * nfs_update_request(struct nfs_open_context* ctx,
 {
 	struct address_space *mapping = page->mapping;
 	struct inode *inode = mapping->host;
-	struct nfs_inode *nfsi = NFS_I(inode);
 	struct nfs_page		*req, *new = NULL;
 	pgoff_t		rqend, end;
 
@@ -613,13 +611,13 @@ static struct nfs_page * nfs_update_request(struct nfs_open_context* ctx,
 		/* Loop over all inode entries and see if we find
 		 * A request for the page we wish to update
 		 */
-		spin_lock(&nfsi->req_lock);
+		spin_lock(&inode->i_lock);
 		req = nfs_page_find_request_locked(page);
 		if (req) {
 			if (!nfs_lock_request_dontget(req)) {
 				int error;
 
-				spin_unlock(&nfsi->req_lock);
+				spin_unlock(&inode->i_lock);
 				error = nfs_wait_on_request(req);
 				nfs_release_request(req);
 				if (error < 0) {
@@ -629,7 +627,7 @@ static struct nfs_page * nfs_update_request(struct nfs_open_context* ctx,
 				}
 				continue;
 			}
-			spin_unlock(&nfsi->req_lock);
+			spin_unlock(&inode->i_lock);
 			if (new)
 				nfs_release_request(new);
 			break;
@@ -640,14 +638,14 @@ static struct nfs_page * nfs_update_request(struct nfs_open_context* ctx,
 			nfs_lock_request_dontget(new);
 			error = nfs_inode_add_request(inode, new);
 			if (error) {
-				spin_unlock(&nfsi->req_lock);
+				spin_unlock(&inode->i_lock);
 				nfs_unlock_request(new);
 				return ERR_PTR(error);
 			}
-			spin_unlock(&nfsi->req_lock);
+			spin_unlock(&inode->i_lock);
 			return new;
 		}
-		spin_unlock(&nfsi->req_lock);
+		spin_unlock(&inode->i_lock);
 
 		new = nfs_create_request(ctx, inode, page, offset, bytes);
 		if (IS_ERR(new))
@@ -751,12 +749,17 @@ int nfs_updatepage(struct file *file, struct page *page,
 static void nfs_writepage_release(struct nfs_page *req)
 {
 
-	if (PageError(req->wb_page) || !nfs_reschedule_unstable_write(req)) {
+	if (PageError(req->wb_page)) {
+		nfs_end_page_writeback(req->wb_page);
+		nfs_inode_remove_request(req);
+	} else if (!nfs_reschedule_unstable_write(req)) {
+		/* Set the PG_uptodate flag */
+		nfs_mark_uptodate(req->wb_page, req->wb_pgbase, req->wb_bytes);
 		nfs_end_page_writeback(req->wb_page);
 		nfs_inode_remove_request(req);
 	} else
 		nfs_end_page_writeback(req->wb_page);
-	nfs_clear_page_writeback(req);
+	nfs_clear_page_tag_locked(req);
 }
 
 static inline int flush_task_priority(int how)
@@ -786,7 +789,7 @@ static void nfs_write_rpcsetup(struct nfs_page *req,
 	 * NB: take care not to mess about with data->commit et al. */
 
 	data->req = req;
-	data->inode = inode = req->wb_context->dentry->d_inode;
+	data->inode = inode = req->wb_context->path.dentry->d_inode;
 	data->cred = req->wb_context->cred;
 
 	data->args.fh     = NFS_FH(inode);
@@ -885,7 +888,7 @@ out_bad:
 	}
 	nfs_redirty_request(req);
 	nfs_end_page_writeback(req->wb_page);
-	nfs_clear_page_writeback(req);
+	nfs_clear_page_tag_locked(req);
 	return -ENOMEM;
 }
 
@@ -928,7 +931,7 @@ static int nfs_flush_one(struct inode *inode, struct list_head *head, unsigned i
 		nfs_list_remove_request(req);
 		nfs_redirty_request(req);
 		nfs_end_page_writeback(req->wb_page);
-		nfs_clear_page_writeback(req);
+		nfs_clear_page_tag_locked(req);
 	}
 	return -ENOMEM;
 }
@@ -954,8 +957,8 @@ static void nfs_writeback_done_partial(struct rpc_task *task, void *calldata)
 	struct page		*page = req->wb_page;
 
 	dprintk("NFS: write (%s/%Ld %d@%Ld)",
-		req->wb_context->dentry->d_inode->i_sb->s_id,
-		(long long)NFS_FILEID(req->wb_context->dentry->d_inode),
+		req->wb_context->path.dentry->d_inode->i_sb->s_id,
+		(long long)NFS_FILEID(req->wb_context->path.dentry->d_inode),
 		req->wb_bytes,
 		(long long)req_offset(req));
 
@@ -970,9 +973,9 @@ static void nfs_writeback_done_partial(struct rpc_task *task, void *calldata)
 	}
 
 	if (nfs_write_need_commit(data)) {
-		spinlock_t *req_lock = &NFS_I(page->mapping->host)->req_lock;
+		struct inode *inode = page->mapping->host;
 
-		spin_lock(req_lock);
+		spin_lock(&inode->i_lock);
 		if (test_bit(PG_NEED_RESCHED, &req->wb_flags)) {
 			/* Do nothing we need to resend the writes */
 		} else if (!test_and_set_bit(PG_NEED_COMMIT, &req->wb_flags)) {
@@ -983,7 +986,7 @@ static void nfs_writeback_done_partial(struct rpc_task *task, void *calldata)
 			clear_bit(PG_NEED_COMMIT, &req->wb_flags);
 			dprintk(" server reboot detected\n");
 		}
-		spin_unlock(req_lock);
+		spin_unlock(&inode->i_lock);
 	} else
 		dprintk(" OK\n");
 
@@ -1020,8 +1023,8 @@ static void nfs_writeback_done_full(struct rpc_task *task, void *calldata)
 		page = req->wb_page;
 
 		dprintk("NFS: write (%s/%Ld %d@%Ld)",
-			req->wb_context->dentry->d_inode->i_sb->s_id,
-			(long long)NFS_FILEID(req->wb_context->dentry->d_inode),
+			req->wb_context->path.dentry->d_inode->i_sb->s_id,
+			(long long)NFS_FILEID(req->wb_context->path.dentry->d_inode),
 			req->wb_bytes,
 			(long long)req_offset(req));
 
@@ -1039,12 +1042,14 @@ static void nfs_writeback_done_full(struct rpc_task *task, void *calldata)
 			dprintk(" marked for commit\n");
 			goto next;
 		}
+		/* Set the PG_uptodate flag? */
+		nfs_mark_uptodate(page, req->wb_pgbase, req->wb_bytes);
 		dprintk(" OK\n");
 remove_request:
 		nfs_end_page_writeback(page);
 		nfs_inode_remove_request(req);
 	next:
-		nfs_clear_page_writeback(req);
+		nfs_clear_page_tag_locked(req);
 	}
 }
 
@@ -1157,7 +1162,7 @@ static void nfs_commit_rpcsetup(struct list_head *head,
 
 	list_splice_init(head, &data->pages);
 	first = nfs_list_entry(data->pages.next);
-	inode = first->wb_context->dentry->d_inode;
+	inode = first->wb_context->path.dentry->d_inode;
 
 	data->inode	  = inode;
 	data->cred	  = first->wb_context->cred;
@@ -1207,7 +1212,7 @@ nfs_commit_list(struct inode *inode, struct list_head *head, int how)
 		nfs_list_remove_request(req);
 		nfs_mark_request_commit(req);
 		dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
-		nfs_clear_page_writeback(req);
+		nfs_clear_page_tag_locked(req);
 	}
 	return -ENOMEM;
 }
@@ -1234,8 +1239,8 @@ static void nfs_commit_done(struct rpc_task *task, void *calldata)
 		dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
 
 		dprintk("NFS: commit (%s/%Ld %d@%Ld)",
-			req->wb_context->dentry->d_inode->i_sb->s_id,
-			(long long)NFS_FILEID(req->wb_context->dentry->d_inode),
+			req->wb_context->path.dentry->d_inode->i_sb->s_id,
+			(long long)NFS_FILEID(req->wb_context->path.dentry->d_inode),
 			req->wb_bytes,
 			(long long)req_offset(req));
 		if (task->tk_status < 0) {
@@ -1249,6 +1254,9 @@ static void nfs_commit_done(struct rpc_task *task, void *calldata)
 		 * returned by the server against all stored verfs. */
 		if (!memcmp(req->wb_verf.verifier, data->verf.verifier, sizeof(data->verf.verifier))) {
 			/* We have a match */
+			/* Set the PG_uptodate flag */
+			nfs_mark_uptodate(req->wb_page, req->wb_pgbase,
+					req->wb_bytes);
 			nfs_inode_remove_request(req);
 			dprintk(" OK\n");
 			goto next;
@@ -1257,7 +1265,7 @@ static void nfs_commit_done(struct rpc_task *task, void *calldata)
 		dprintk(" mismatch\n");
 		nfs_redirty_request(req);
 	next:
-		nfs_clear_page_writeback(req);
+		nfs_clear_page_tag_locked(req);
 	}
 }
 
@@ -1268,13 +1276,12 @@ static const struct rpc_call_ops nfs_commit_ops = {
 
 int nfs_commit_inode(struct inode *inode, int how)
 {
-	struct nfs_inode *nfsi = NFS_I(inode);
 	LIST_HEAD(head);
 	int res;
 
-	spin_lock(&nfsi->req_lock);
+	spin_lock(&inode->i_lock);
 	res = nfs_scan_commit(inode, &head, 0, 0);
-	spin_unlock(&nfsi->req_lock);
+	spin_unlock(&inode->i_lock);
 	if (res) {
 		int error = nfs_commit_list(inode, &head, how);
 		if (error < 0)
@@ -1292,7 +1299,6 @@ static inline int nfs_commit_list(struct inode *inode, struct list_head *head, i
 long nfs_sync_mapping_wait(struct address_space *mapping, struct writeback_control *wbc, int how)
 {
 	struct inode *inode = mapping->host;
-	struct nfs_inode *nfsi = NFS_I(inode);
 	pgoff_t idx_start, idx_end;
 	unsigned int npages = 0;
 	LIST_HEAD(head);
@@ -1314,7 +1320,7 @@ long nfs_sync_mapping_wait(struct address_space *mapping, struct writeback_contr
 		}
 	}
 	how &= ~FLUSH_NOCOMMIT;
-	spin_lock(&nfsi->req_lock);
+	spin_lock(&inode->i_lock);
 	do {
 		ret = nfs_wait_on_requests_locked(inode, idx_start, npages);
 		if (ret != 0)
@@ -1325,18 +1331,19 @@ long nfs_sync_mapping_wait(struct address_space *mapping, struct writeback_contr
 		if (pages == 0)
 			break;
 		if (how & FLUSH_INVALIDATE) {
-			spin_unlock(&nfsi->req_lock);
+			spin_unlock(&inode->i_lock);
 			nfs_cancel_commit_list(&head);
 			ret = pages;
-			spin_lock(&nfsi->req_lock);
+			spin_lock(&inode->i_lock);
 			continue;
 		}
 		pages += nfs_scan_commit(inode, &head, 0, 0);
-		spin_unlock(&nfsi->req_lock);
+		spin_unlock(&inode->i_lock);
 		ret = nfs_commit_list(inode, &head, how);
-		spin_lock(&nfsi->req_lock);
+		spin_lock(&inode->i_lock);
+
 	} while (ret >= 0);
-	spin_unlock(&nfsi->req_lock);
+	spin_unlock(&inode->i_lock);
 	return ret;
 }
 
@@ -1430,7 +1437,6 @@ int nfs_set_page_dirty(struct page *page)
 {
 	struct address_space *mapping = page->mapping;
 	struct inode *inode;
-	spinlock_t *req_lock;
 	struct nfs_page *req;
 	int ret;
 
@@ -1439,18 +1445,17 @@ int nfs_set_page_dirty(struct page *page)
 	inode = mapping->host;
 	if (!inode)
 		goto out_raced;
-	req_lock = &NFS_I(inode)->req_lock;
-	spin_lock(req_lock);
+	spin_lock(&inode->i_lock);
 	req = nfs_page_find_request_locked(page);
 	if (req != NULL) {
 		/* Mark any existing write requests for flushing */
 		ret = !test_and_set_bit(PG_NEED_FLUSH, &req->wb_flags);
-		spin_unlock(req_lock);
+		spin_unlock(&inode->i_lock);
 		nfs_release_request(req);
 		return ret;
 	}
 	ret = __set_page_dirty_nobuffers(page);
-	spin_unlock(req_lock);
+	spin_unlock(&inode->i_lock);
 	return ret;
 out_raced:
 	return !TestSetPageDirty(page);
diff --git a/fs/nfsd/auth.c b/fs/nfsd/auth.c
index 6e92b0f..cf61dc8 100644
--- a/fs/nfsd/auth.c
+++ b/fs/nfsd/auth.c
@@ -12,17 +12,31 @@
 
 #define	CAP_NFSD_MASK (CAP_FS_MASK|CAP_TO_MASK(CAP_SYS_RESOURCE))
 
+static int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp)
+{
+	struct exp_flavor_info *f;
+	struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors;
+
+	for (f = exp->ex_flavors; f < end; f++) {
+		if (f->pseudoflavor == rqstp->rq_flavor)
+			return f->flags;
+	}
+	return exp->ex_flags;
+
+}
+
 int nfsd_setuser(struct svc_rqst *rqstp, struct svc_export *exp)
 {
 	struct svc_cred	cred = rqstp->rq_cred;
 	int i;
+	int flags = nfsexp_flags(rqstp, exp);
 	int ret;
 
-	if (exp->ex_flags & NFSEXP_ALLSQUASH) {
+	if (flags & NFSEXP_ALLSQUASH) {
 		cred.cr_uid = exp->ex_anon_uid;
 		cred.cr_gid = exp->ex_anon_gid;
 		cred.cr_group_info = groups_alloc(0);
-	} else if (exp->ex_flags & NFSEXP_ROOTSQUASH) {
+	} else if (flags & NFSEXP_ROOTSQUASH) {
 		struct group_info *gi;
 		if (!cred.cr_uid)
 			cred.cr_uid = exp->ex_anon_uid;
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 79bd03b..c7bbf46 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -26,12 +26,15 @@
 #include <linux/mount.h>
 #include <linux/hash.h>
 #include <linux/module.h>
+#include <linux/exportfs.h>
 
 #include <linux/sunrpc/svc.h>
 #include <linux/nfsd/nfsd.h>
 #include <linux/nfsd/nfsfh.h>
 #include <linux/nfsd/syscall.h>
 #include <linux/lockd/bind.h>
+#include <linux/sunrpc/msg_prot.h>
+#include <linux/sunrpc/gss_api.h>
 
 #define NFSDDBG_FACILITY	NFSDDBG_EXPORT
 
@@ -451,8 +454,48 @@ out_free_all:
 	return err;
 }
 
+static int secinfo_parse(char **mesg, char *buf, struct svc_export *exp)
+{
+	int listsize, err;
+	struct exp_flavor_info *f;
+
+	err = get_int(mesg, &listsize);
+	if (err)
+		return err;
+	if (listsize < 0 || listsize > MAX_SECINFO_LIST)
+		return -EINVAL;
+
+	for (f = exp->ex_flavors; f < exp->ex_flavors + listsize; f++) {
+		err = get_int(mesg, &f->pseudoflavor);
+		if (err)
+			return err;
+		/*
+		 * Just a quick sanity check; we could also try to check
+		 * whether this pseudoflavor is supported, but at worst
+		 * an unsupported pseudoflavor on the export would just
+		 * be a pseudoflavor that won't match the flavor of any
+		 * authenticated request.  The administrator will
+		 * probably discover the problem when someone fails to
+		 * authenticate.
+		 */
+		if (f->pseudoflavor < 0)
+			return -EINVAL;
+		err = get_int(mesg, &f->flags);
+		if (err)
+			return err;
+		/* Only some flags are allowed to differ between flavors: */
+		if (~NFSEXP_SECINFO_FLAGS & (f->flags ^ exp->ex_flags))
+			return -EINVAL;
+	}
+	exp->ex_nflavors = listsize;
+	return 0;
+}
+
 #else /* CONFIG_NFSD_V4 */
-static inline int fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc) { return 0; }
+static inline int
+fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc){return 0;}
+static inline int
+secinfo_parse(char **mesg, char *buf, struct svc_export *exp) { return 0; }
 #endif
 
 static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
@@ -476,6 +519,9 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 
 	exp.ex_uuid = NULL;
 
+	/* secinfo */
+	exp.ex_nflavors = 0;
+
 	if (mesg[mlen-1] != '\n')
 		return -EINVAL;
 	mesg[mlen-1] = 0;
@@ -553,7 +599,9 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 					if (exp.ex_uuid == NULL)
 						err = -ENOMEM;
 				}
-			} else
+			} else if (strcmp(buf, "secinfo") == 0)
+				err = secinfo_parse(&mesg, buf, &exp);
+			else
 				/* quietly ignore unknown words and anything
 				 * following. Newer user-space can try to set
 				 * new values, then see what the result was.
@@ -593,6 +641,7 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 
 static void exp_flags(struct seq_file *m, int flag, int fsid,
 		uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fslocs);
+static void show_secinfo(struct seq_file *m, struct svc_export *exp);
 
 static int svc_export_show(struct seq_file *m,
 			   struct cache_detail *cd,
@@ -622,6 +671,7 @@ static int svc_export_show(struct seq_file *m,
 				seq_printf(m, "%02x", exp->ex_uuid[i]);
 			}
 		}
+		show_secinfo(m, exp);
 	}
 	seq_puts(m, ")\n");
 	return 0;
@@ -654,6 +704,7 @@ static void export_update(struct cache_head *cnew, struct cache_head *citem)
 {
 	struct svc_export *new = container_of(cnew, struct svc_export, h);
 	struct svc_export *item = container_of(citem, struct svc_export, h);
+	int i;
 
 	new->ex_flags = item->ex_flags;
 	new->ex_anon_uid = item->ex_anon_uid;
@@ -669,6 +720,10 @@ static void export_update(struct cache_head *cnew, struct cache_head *citem)
 	item->ex_fslocs.locations_count = 0;
 	new->ex_fslocs.migrated = item->ex_fslocs.migrated;
 	item->ex_fslocs.migrated = 0;
+	new->ex_nflavors = item->ex_nflavors;
+	for (i = 0; i < MAX_SECINFO_LIST; i++) {
+		new->ex_flavors[i] = item->ex_flavors[i];
+	}
 }
 
 static struct cache_head *svc_export_alloc(void)
@@ -738,16 +793,18 @@ exp_find_key(svc_client *clp, int fsid_type, u32 *fsidv, struct cache_req *reqp)
 	int err;
 	
 	if (!clp)
-		return NULL;
+		return ERR_PTR(-ENOENT);
 
 	key.ek_client = clp;
 	key.ek_fsidtype = fsid_type;
 	memcpy(key.ek_fsid, fsidv, key_len(fsid_type));
 
 	ek = svc_expkey_lookup(&key);
-	if (ek != NULL)
-		if ((err = cache_check(&svc_expkey_cache, &ek->h, reqp)))
-			ek = ERR_PTR(err);
+	if (ek == NULL)
+		return ERR_PTR(-ENOMEM);
+	err = cache_check(&svc_expkey_cache, &ek->h, reqp);
+	if (err)
+		return ERR_PTR(err);
 	return ek;
 }
 
@@ -808,30 +865,21 @@ exp_get_by_name(svc_client *clp, struct vfsmount *mnt, struct dentry *dentry,
 		struct cache_req *reqp)
 {
 	struct svc_export *exp, key;
+	int err;
 	
 	if (!clp)
-		return NULL;
+		return ERR_PTR(-ENOENT);
 
 	key.ex_client = clp;
 	key.ex_mnt = mnt;
 	key.ex_dentry = dentry;
 
 	exp = svc_export_lookup(&key);
-	if (exp != NULL)  {
-		int err;
-
-		err = cache_check(&svc_export_cache, &exp->h, reqp);
-		switch (err) {
-		case 0: break;
-		case -EAGAIN:
-		case -ETIMEDOUT:
-			exp = ERR_PTR(err);
-			break;
-		default:
-			exp = NULL;
-		}
-	}
-
+	if (exp == NULL)
+		return ERR_PTR(-ENOMEM);
+	err = cache_check(&svc_export_cache, &exp->h, reqp);
+	if (err)
+		return ERR_PTR(err);
 	return exp;
 }
 
@@ -847,7 +895,7 @@ exp_parent(svc_client *clp, struct vfsmount *mnt, struct dentry *dentry,
 	dget(dentry);
 	exp = exp_get_by_name(clp, mnt, dentry, reqp);
 
-	while (exp == NULL && !IS_ROOT(dentry)) {
+	while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(dentry)) {
 		struct dentry *parent;
 
 		parent = dget_parent(dentry);
@@ -900,7 +948,7 @@ static void exp_fsid_unhash(struct svc_export *exp)
 		return;
 
 	ek = exp_get_fsid_key(exp->ex_client, exp->ex_fsid);
-	if (ek && !IS_ERR(ek)) {
+	if (!IS_ERR(ek)) {
 		ek->h.expiry_time = get_seconds()-1;
 		cache_put(&ek->h, &svc_expkey_cache);
 	}
@@ -938,7 +986,7 @@ static void exp_unhash(struct svc_export *exp)
 	struct inode *inode = exp->ex_dentry->d_inode;
 
 	ek = exp_get_key(exp->ex_client, inode->i_sb->s_dev, inode->i_ino);
-	if (ek && !IS_ERR(ek)) {
+	if (!IS_ERR(ek)) {
 		ek->h.expiry_time = get_seconds()-1;
 		cache_put(&ek->h, &svc_expkey_cache);
 	}
@@ -989,13 +1037,12 @@ exp_export(struct nfsctl_export *nxp)
 
 	/* must make sure there won't be an ex_fsid clash */
 	if ((nxp->ex_flags & NFSEXP_FSID) &&
-	    (fsid_key = exp_get_fsid_key(clp, nxp->ex_dev)) &&
-	    !IS_ERR(fsid_key) &&
+	    (!IS_ERR(fsid_key = exp_get_fsid_key(clp, nxp->ex_dev))) &&
 	    fsid_key->ek_mnt &&
 	    (fsid_key->ek_mnt != nd.mnt || fsid_key->ek_dentry != nd.dentry) )
 		goto finish;
 
-	if (exp) {
+	if (!IS_ERR(exp)) {
 		/* just a flags/id/fsid update */
 
 		exp_fsid_unhash(exp);
@@ -1104,7 +1151,7 @@ exp_unexport(struct nfsctl_export *nxp)
 	err = -EINVAL;
 	exp = exp_get_by_name(dom, nd.mnt, nd.dentry, NULL);
 	path_release(&nd);
-	if (!exp)
+	if (IS_ERR(exp))
 		goto out_domain;
 
 	exp_do_unexport(exp);
@@ -1149,10 +1196,6 @@ exp_rootfh(svc_client *clp, char *path, struct knfsd_fh *f, int maxsize)
 		err = PTR_ERR(exp);
 		goto out;
 	}
-	if (!exp) {
-		dprintk("nfsd: exp_rootfh export not found.\n");
-		goto out;
-	}
 
 	/*
 	 * fh must be initialized before calling fh_compose
@@ -1176,17 +1219,130 @@ exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv,
 {
 	struct svc_export *exp;
 	struct svc_expkey *ek = exp_find_key(clp, fsid_type, fsidv, reqp);
-	if (!ek || IS_ERR(ek))
+	if (IS_ERR(ek))
 		return ERR_PTR(PTR_ERR(ek));
 
 	exp = exp_get_by_name(clp, ek->ek_mnt, ek->ek_dentry, reqp);
 	cache_put(&ek->h, &svc_expkey_cache);
 
-	if (!exp || IS_ERR(exp))
+	if (IS_ERR(exp))
 		return ERR_PTR(PTR_ERR(exp));
 	return exp;
 }
 
+__be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp)
+{
+	struct exp_flavor_info *f;
+	struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors;
+
+	/* legacy gss-only clients are always OK: */
+	if (exp->ex_client == rqstp->rq_gssclient)
+		return 0;
+	/* ip-address based client; check sec= export option: */
+	for (f = exp->ex_flavors; f < end; f++) {
+		if (f->pseudoflavor == rqstp->rq_flavor)
+			return 0;
+	}
+	/* defaults in absence of sec= options: */
+	if (exp->ex_nflavors == 0) {
+		if (rqstp->rq_flavor == RPC_AUTH_NULL ||
+		    rqstp->rq_flavor == RPC_AUTH_UNIX)
+			return 0;
+	}
+	return nfserr_wrongsec;
+}
+
+/*
+ * Uses rq_client and rq_gssclient to find an export; uses rq_client (an
+ * auth_unix client) if it's available and has secinfo information;
+ * otherwise, will try to use rq_gssclient.
+ *
+ * Called from functions that handle requests; functions that do work on
+ * behalf of mountd are passed a single client name to use, and should
+ * use exp_get_by_name() or exp_find().
+ */
+struct svc_export *
+rqst_exp_get_by_name(struct svc_rqst *rqstp, struct vfsmount *mnt,
+		struct dentry *dentry)
+{
+	struct svc_export *gssexp, *exp = NULL;
+
+	if (rqstp->rq_client == NULL)
+		goto gss;
+
+	/* First try the auth_unix client: */
+	exp = exp_get_by_name(rqstp->rq_client, mnt, dentry,
+						&rqstp->rq_chandle);
+	if (PTR_ERR(exp) == -ENOENT)
+		goto gss;
+	if (IS_ERR(exp))
+		return exp;
+	/* If it has secinfo, assume there are no gss/... clients */
+	if (exp->ex_nflavors > 0)
+		return exp;
+gss:
+	/* Otherwise, try falling back on gss client */
+	if (rqstp->rq_gssclient == NULL)
+		return exp;
+	gssexp = exp_get_by_name(rqstp->rq_gssclient, mnt, dentry,
+						&rqstp->rq_chandle);
+	if (PTR_ERR(gssexp) == -ENOENT)
+		return exp;
+	if (exp && !IS_ERR(exp))
+		exp_put(exp);
+	return gssexp;
+}
+
+struct svc_export *
+rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv)
+{
+	struct svc_export *gssexp, *exp = NULL;
+
+	if (rqstp->rq_client == NULL)
+		goto gss;
+
+	/* First try the auth_unix client: */
+	exp = exp_find(rqstp->rq_client, fsid_type, fsidv, &rqstp->rq_chandle);
+	if (PTR_ERR(exp) == -ENOENT)
+		goto gss;
+	if (IS_ERR(exp))
+		return exp;
+	/* If it has secinfo, assume there are no gss/... clients */
+	if (exp->ex_nflavors > 0)
+		return exp;
+gss:
+	/* Otherwise, try falling back on gss client */
+	if (rqstp->rq_gssclient == NULL)
+		return exp;
+	gssexp = exp_find(rqstp->rq_gssclient, fsid_type, fsidv,
+						&rqstp->rq_chandle);
+	if (PTR_ERR(gssexp) == -ENOENT)
+		return exp;
+	if (exp && !IS_ERR(exp))
+		exp_put(exp);
+	return gssexp;
+}
+
+struct svc_export *
+rqst_exp_parent(struct svc_rqst *rqstp, struct vfsmount *mnt,
+		struct dentry *dentry)
+{
+	struct svc_export *exp;
+
+	dget(dentry);
+	exp = rqst_exp_get_by_name(rqstp, mnt, dentry);
+
+	while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(dentry)) {
+		struct dentry *parent;
+
+		parent = dget_parent(dentry);
+		dput(dentry);
+		dentry = parent;
+		exp = rqst_exp_get_by_name(rqstp, mnt, dentry);
+	}
+	dput(dentry);
+	return exp;
+}
 
 /*
  * Called when we need the filehandle for the root of the pseudofs,
@@ -1194,8 +1350,7 @@ exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv,
  * export point with fsid==0
  */
 __be32
-exp_pseudoroot(struct auth_domain *clp, struct svc_fh *fhp,
-	       struct cache_req *creq)
+exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp)
 {
 	struct svc_export *exp;
 	__be32 rv;
@@ -1203,12 +1358,16 @@ exp_pseudoroot(struct auth_domain *clp, struct svc_fh *fhp,
 
 	mk_fsid(FSID_NUM, fsidv, 0, 0, 0, NULL);
 
-	exp = exp_find(clp, FSID_NUM, fsidv, creq);
+	exp = rqst_exp_find(rqstp, FSID_NUM, fsidv);
+	if (PTR_ERR(exp) == -ENOENT)
+		return nfserr_perm;
 	if (IS_ERR(exp))
 		return nfserrno(PTR_ERR(exp));
-	if (exp == NULL)
-		return nfserr_perm;
 	rv = fh_compose(fhp, exp, exp->ex_dentry, NULL);
+	if (rv)
+		goto out;
+	rv = check_nfsd_access(exp, rqstp);
+out:
 	exp_put(exp);
 	return rv;
 }
@@ -1296,28 +1455,62 @@ static struct flags {
 	{ 0, {"", ""}}
 };
 
-static void exp_flags(struct seq_file *m, int flag, int fsid,
-		uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fsloc)
+static void show_expflags(struct seq_file *m, int flags, int mask)
 {
-	int first = 0;
 	struct flags *flg;
+	int state, first = 0;
 
 	for (flg = expflags; flg->flag; flg++) {
-		int state = (flg->flag & flag)?0:1;
+		if (flg->flag & ~mask)
+			continue;
+		state = (flg->flag & flags) ? 0 : 1;
 		if (*flg->name[state])
 			seq_printf(m, "%s%s", first++?",":"", flg->name[state]);
 	}
+}
+
+static void show_secinfo_flags(struct seq_file *m, int flags)
+{
+	seq_printf(m, ",");
+	show_expflags(m, flags, NFSEXP_SECINFO_FLAGS);
+}
+
+static void show_secinfo(struct seq_file *m, struct svc_export *exp)
+{
+	struct exp_flavor_info *f;
+	struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors;
+	int lastflags = 0, first = 0;
+
+	if (exp->ex_nflavors == 0)
+		return;
+	for (f = exp->ex_flavors; f < end; f++) {
+		if (first || f->flags != lastflags) {
+			if (!first)
+				show_secinfo_flags(m, lastflags);
+			seq_printf(m, ",sec=%d", f->pseudoflavor);
+			lastflags = f->flags;
+		} else {
+			seq_printf(m, ":%d", f->pseudoflavor);
+		}
+	}
+	show_secinfo_flags(m, lastflags);
+}
+
+static void exp_flags(struct seq_file *m, int flag, int fsid,
+		uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fsloc)
+{
+	show_expflags(m, flag, NFSEXP_ALLFLAGS);
 	if (flag & NFSEXP_FSID)
-		seq_printf(m, "%sfsid=%d", first++?",":"", fsid);
+		seq_printf(m, ",fsid=%d", fsid);
 	if (anonu != (uid_t)-2 && anonu != (0x10000-2))
-		seq_printf(m, "%sanonuid=%d", first++?",":"", anonu);
+		seq_printf(m, ",sanonuid=%d", anonu);
 	if (anong != (gid_t)-2 && anong != (0x10000-2))
-		seq_printf(m, "%sanongid=%d", first++?",":"", anong);
+		seq_printf(m, ",sanongid=%d", anong);
 	if (fsloc && fsloc->locations_count > 0) {
 		char *loctype = (fsloc->migrated) ? "refer" : "replicas";
 		int i;
 
-		seq_printf(m, "%s%s=", first++?",":"", loctype);
+		seq_printf(m, ",%s=", loctype);
 		seq_escape(m, fsloc->locations[0].path, ",;@ \t\n\\");
 		seq_putc(m, '@');
 		seq_escape(m, fsloc->locations[0].hosts, ",;@ \t\n\\");
diff --git a/fs/nfsd/lockd.c b/fs/nfsd/lockd.c
index 221acd1f..9e4a568 100644
--- a/fs/nfsd/lockd.c
+++ b/fs/nfsd/lockd.c
@@ -65,6 +65,7 @@ nlm_fclose(struct file *filp)
 static struct nlmsvc_binding	nfsd_nlm_ops = {
 	.fopen		= nlm_fopen,		/* open file for locking */
 	.fclose		= nlm_fclose,		/* close file */
+	.get_grace_period = get_nfs4_grace_period,
 };
 
 void
diff --git a/fs/nfsd/nfs4acl.c b/fs/nfsd/nfs4acl.c
index cc3b7ba..b6ed383 100644
--- a/fs/nfsd/nfs4acl.c
+++ b/fs/nfsd/nfs4acl.c
@@ -183,8 +183,13 @@ static void
 summarize_posix_acl(struct posix_acl *acl, struct posix_acl_summary *pas)
 {
 	struct posix_acl_entry *pa, *pe;
-	pas->users = 0;
-	pas->groups = 0;
+
+	/*
+	 * Only pas.users and pas.groups need initialization; previous
+	 * posix_acl_valid() calls ensure that the other fields will be
+	 * initialized in the following loop.  But, just to placate gcc:
+	 */
+	memset(pas, 0, sizeof(*pas));
 	pas->mask = 07;
 
 	pe = acl->a_entries + acl->a_count;
@@ -732,13 +737,16 @@ int nfs4_acl_nfsv4_to_posix(struct nfs4_acl *acl, struct posix_acl **pacl,
 	*pacl = posix_state_to_acl(&effective_acl_state, flags);
 	if (IS_ERR(*pacl)) {
 		ret = PTR_ERR(*pacl);
+		*pacl = NULL;
 		goto out_dstate;
 	}
 	*dpacl = posix_state_to_acl(&default_acl_state,
 						flags | NFS4_ACL_TYPE_DEFAULT);
 	if (IS_ERR(*dpacl)) {
 		ret = PTR_ERR(*dpacl);
+		*dpacl = NULL;
 		posix_acl_release(*pacl);
+		*pacl = NULL;
 		goto out_dstate;
 	}
 	sort_pacl(*pacl);
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 864090e..31d6633 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -75,7 +75,7 @@ enum nfs_cb_opnum4 {
 #define op_enc_sz			1
 #define op_dec_sz			2
 #define enc_nfs4_fh_sz			(1 + (NFS4_FHSIZE >> 2))
-#define enc_stateid_sz			16
+#define enc_stateid_sz			(NFS4_STATEID_SIZE >> 2)
 #define NFS4_enc_cb_recall_sz		(cb_compound_enc_hdr_sz +       \
 					1 + enc_stateid_sz +            \
 					enc_nfs4_fh_sz)
@@ -394,7 +394,6 @@ nfsd4_probe_callback(struct nfs4_client *clp)
 		.rpc_proc       = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL],
 		.rpc_argp       = clp,
 	};
-	char clientname[16];
 	int status;
 
 	if (atomic_read(&cb->cb_set))
@@ -417,11 +416,6 @@ nfsd4_probe_callback(struct nfs4_client *clp)
 	memset(program->stats, 0, sizeof(cb->cb_stat));
 	program->stats->program = program;
 
-	/* Just here to make some printk's more useful: */
-	snprintf(clientname, sizeof(clientname),
-		"%u.%u.%u.%u", NIPQUAD(addr.sin_addr));
-	args.servername = clientname;
-
 	/* Create RPC client */
 	cb->cb_client = rpc_create(&args);
 	if (IS_ERR(cb->cb_client)) {
@@ -429,29 +423,23 @@ nfsd4_probe_callback(struct nfs4_client *clp)
 		goto out_err;
 	}
 
-	/* Kick rpciod, put the call on the wire. */
-	if (rpciod_up() != 0)
-		goto out_clnt;
-
 	/* the task holds a reference to the nfs4_client struct */
 	atomic_inc(&clp->cl_count);
 
 	msg.rpc_cred = nfsd4_lookupcred(clp,0);
 	if (IS_ERR(msg.rpc_cred))
-		goto out_rpciod;
+		goto out_release_clp;
 	status = rpc_call_async(cb->cb_client, &msg, RPC_TASK_ASYNC, &nfs4_cb_null_ops, NULL);
 	put_rpccred(msg.rpc_cred);
 
 	if (status != 0) {
 		dprintk("NFSD: asynchronous NFSPROC4_CB_NULL failed!\n");
-		goto out_rpciod;
+		goto out_release_clp;
 	}
 	return;
 
-out_rpciod:
+out_release_clp:
 	atomic_dec(&clp->cl_count);
-	rpciod_down();
-out_clnt:
 	rpc_shutdown_client(cb->cb_client);
 out_err:
 	cb->cb_client = NULL;
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index 45aa21c..2cf9a9a 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -587,6 +587,15 @@ idmap_lookup(struct svc_rqst *rqstp,
 	return ret;
 }
 
+static char *
+rqst_authname(struct svc_rqst *rqstp)
+{
+	struct auth_domain *clp;
+
+	clp = rqstp->rq_gssclient ? rqstp->rq_gssclient : rqstp->rq_client;
+	return clp->name;
+}
+
 static int
 idmap_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen,
 		uid_t *id)
@@ -600,7 +609,7 @@ idmap_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen
 		return -EINVAL;
 	memcpy(key.name, name, namelen);
 	key.name[namelen] = '\0';
-	strlcpy(key.authname, rqstp->rq_client->name, sizeof(key.authname));
+	strlcpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));
 	ret = idmap_lookup(rqstp, nametoid_lookup, &key, &nametoid_cache, &item);
 	if (ret == -ENOENT)
 		ret = -ESRCH; /* nfserr_badname */
@@ -620,7 +629,7 @@ idmap_id_to_name(struct svc_rqst *rqstp, int type, uid_t id, char *name)
 	};
 	int ret;
 
-	strlcpy(key.authname, rqstp->rq_client->name, sizeof(key.authname));
+	strlcpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));
 	ret = idmap_lookup(rqstp, idtoname_lookup, &key, &idtoname_cache, &item);
 	if (ret == -ENOENT)
 		return sprintf(name, "%u", id);
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 8522729..3c62712 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -47,6 +47,7 @@
 #include <linux/nfsd/state.h>
 #include <linux/nfsd/xdr4.h>
 #include <linux/nfs4_acl.h>
+#include <linux/sunrpc/gss_api.h>
 
 #define NFSDDBG_FACILITY		NFSDDBG_PROC
 
@@ -286,8 +287,7 @@ nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	__be32 status;
 
 	fh_put(&cstate->current_fh);
-	status = exp_pseudoroot(rqstp->rq_client, &cstate->current_fh,
-			      &rqstp->rq_chandle);
+	status = exp_pseudoroot(rqstp, &cstate->current_fh);
 	return status;
 }
 
@@ -474,8 +474,8 @@ nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	__be32 ret;
 
 	fh_init(&tmp_fh, NFS4_FHSIZE);
-	if((ret = exp_pseudoroot(rqstp->rq_client, &tmp_fh,
-			      &rqstp->rq_chandle)) != 0)
+	ret = exp_pseudoroot(rqstp, &tmp_fh);
+	if (ret)
 		return ret;
 	if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) {
 		fh_put(&tmp_fh);
@@ -611,6 +611,30 @@ nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 }
 
 static __be32
+nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+	      struct nfsd4_secinfo *secinfo)
+{
+	struct svc_fh resfh;
+	struct svc_export *exp;
+	struct dentry *dentry;
+	__be32 err;
+
+	fh_init(&resfh, NFS4_FHSIZE);
+	err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
+				    secinfo->si_name, secinfo->si_namelen,
+				    &exp, &dentry);
+	if (err)
+		return err;
+	if (dentry->d_inode == NULL) {
+		exp_put(exp);
+		err = nfserr_noent;
+	} else
+		secinfo->si_exp = exp;
+	dput(dentry);
+	return err;
+}
+
+static __be32
 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	      struct nfsd4_setattr *setattr)
 {
@@ -1009,6 +1033,9 @@ static struct nfsd4_operation nfsd4_ops[OP_RELEASE_LOCKOWNER+1] = {
 	[OP_SAVEFH] = {
 		.op_func = (nfsd4op_func)nfsd4_savefh,
 	},
+	[OP_SECINFO] = {
+		.op_func = (nfsd4op_func)nfsd4_secinfo,
+	},
 	[OP_SETATTR] = {
 		.op_func = (nfsd4op_func)nfsd4_setattr,
 	},
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 3cc8ce4..e4a4c87 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -49,8 +49,10 @@
 #include <linux/nfsd/state.h>
 #include <linux/nfsd/xdr4.h>
 #include <linux/namei.h>
+#include <linux/swap.h>
 #include <linux/mutex.h>
 #include <linux/lockd/bind.h>
+#include <linux/module.h>
 
 #define NFSDDBG_FACILITY                NFSDDBG_PROC
 
@@ -149,6 +151,7 @@ get_nfs4_file(struct nfs4_file *fi)
 }
 
 static int num_delegations;
+unsigned int max_delegations;
 
 /*
  * Open owner state (share locks)
@@ -192,7 +195,9 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f
 	struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback;
 
 	dprintk("NFSD alloc_init_deleg\n");
-	if (num_delegations > STATEID_HASH_SIZE * 4)
+	if (fp->fi_had_conflict)
+		return NULL;
+	if (num_delegations > max_delegations)
 		return NULL;
 	dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL);
 	if (dp == NULL)
@@ -378,7 +383,6 @@ shutdown_callback_client(struct nfs4_client *clp)
 	if (clnt) {
 		clp->cl_callback.cb_client = NULL;
 		rpc_shutdown_client(clnt);
-		rpciod_down();
 	}
 }
 
@@ -1000,6 +1004,7 @@ alloc_init_file(struct inode *ino)
 		list_add(&fp->fi_hash, &file_hashtbl[hashval]);
 		fp->fi_inode = igrab(ino);
 		fp->fi_id = current_fileid++;
+		fp->fi_had_conflict = false;
 		return fp;
 	}
 	return NULL;
@@ -1326,6 +1331,7 @@ do_recall(void *__dp)
 {
 	struct nfs4_delegation *dp = __dp;
 
+	dp->dl_file->fi_had_conflict = true;
 	nfsd4_cb_recall(dp);
 	return 0;
 }
@@ -3191,20 +3197,49 @@ nfsd4_load_reboot_recovery_data(void)
 		printk("NFSD: Failure reading reboot recovery data\n");
 }
 
+unsigned long
+get_nfs4_grace_period(void)
+{
+	return max(user_lease_time, lease_time) * HZ;
+}
+
+/*
+ * Since the lifetime of a delegation isn't limited to that of an open, a
+ * client may quite reasonably hang on to a delegation as long as it has
+ * the inode cached.  This becomes an obvious problem the first time a
+ * client's inode cache approaches the size of the server's total memory.
+ *
+ * For now we avoid this problem by imposing a hard limit on the number
+ * of delegations, which varies according to the server's memory size.
+ */
+static void
+set_max_delegations(void)
+{
+	/*
+	 * Allow at most 4 delegations per megabyte of RAM.  Quick
+	 * estimates suggest that in the worst case (where every delegation
+	 * is for a different inode), a delegation could take about 1.5K,
+	 * giving a worst case usage of about 6% of memory.
+	 */
+	max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT);
+}
+
 /* initialization to perform when the nfsd service is started: */
 
 static void
 __nfs4_state_start(void)
 {
-	time_t grace_time;
+	unsigned long grace_time;
 
 	boot_time = get_seconds();
-	grace_time = max(user_lease_time, lease_time);
+	grace_time = get_nfs_grace_period();
 	lease_time = user_lease_time;
 	in_grace = 1;
-	printk("NFSD: starting %ld-second grace period\n", grace_time);
+	printk(KERN_INFO "NFSD: starting %ld-second grace period\n",
+	       grace_time/HZ);
 	laundry_wq = create_singlethread_workqueue("nfsd4");
-	queue_delayed_work(laundry_wq, &laundromat_work, grace_time*HZ);
+	queue_delayed_work(laundry_wq, &laundromat_work, grace_time);
+	set_max_delegations();
 }
 
 int
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 15809df..b3d55c6 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -56,6 +56,8 @@
 #include <linux/nfsd_idmap.h>
 #include <linux/nfs4.h>
 #include <linux/nfs4_acl.h>
+#include <linux/sunrpc/gss_api.h>
+#include <linux/sunrpc/svcauth_gss.h>
 
 #define NFSDDBG_FACILITY		NFSDDBG_XDR
 
@@ -819,6 +821,23 @@ nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
 }
 
 static __be32
+nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
+		     struct nfsd4_secinfo *secinfo)
+{
+	DECODE_HEAD;
+
+	READ_BUF(4);
+	READ32(secinfo->si_namelen);
+	READ_BUF(secinfo->si_namelen);
+	SAVEMEM(secinfo->si_name, secinfo->si_namelen);
+	status = check_filename(secinfo->si_name, secinfo->si_namelen,
+								nfserr_noent);
+	if (status)
+		return status;
+	DECODE_TAIL;
+}
+
+static __be32
 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
 {
 	DECODE_HEAD;
@@ -1131,6 +1150,9 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
 		case OP_SAVEFH:
 			op->status = nfs_ok;
 			break;
+		case OP_SECINFO:
+			op->status = nfsd4_decode_secinfo(argp, &op->u.secinfo);
+			break;
 		case OP_SETATTR:
 			op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
 			break;
@@ -1296,7 +1318,7 @@ static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *
 	char *path, *rootpath;
 
 	fh_init(&tmp_fh, NFS4_FHSIZE);
-	*stat = exp_pseudoroot(rqstp->rq_client, &tmp_fh, &rqstp->rq_chandle);
+	*stat = exp_pseudoroot(rqstp, &tmp_fh);
 	if (*stat)
 		return NULL;
 	rootpath = tmp_fh.fh_export->ex_path;
@@ -1847,11 +1869,19 @@ nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
 	if (d_mountpoint(dentry)) {
 		int err;
 
+		/*
+		 * Why the heck aren't we just using nfsd_lookup??
+		 * Different "."/".." handling?  Something else?
+		 * At least, add a comment here to explain....
+		 */
 		err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
 		if (err) {
 			nfserr = nfserrno(err);
 			goto out_put;
 		}
+		nfserr = check_nfsd_access(exp, cd->rd_rqstp);
+		if (nfserr)
+			goto out_put;
 
 	}
 	nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
@@ -2419,6 +2449,72 @@ nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_
 	}
 }
 
+static void
+nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, int nfserr,
+		     struct nfsd4_secinfo *secinfo)
+{
+	int i = 0;
+	struct svc_export *exp = secinfo->si_exp;
+	u32 nflavs;
+	struct exp_flavor_info *flavs;
+	struct exp_flavor_info def_flavs[2];
+	ENCODE_HEAD;
+
+	if (nfserr)
+		goto out;
+	if (exp->ex_nflavors) {
+		flavs = exp->ex_flavors;
+		nflavs = exp->ex_nflavors;
+	} else { /* Handling of some defaults in absence of real secinfo: */
+		flavs = def_flavs;
+		if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
+			nflavs = 2;
+			flavs[0].pseudoflavor = RPC_AUTH_UNIX;
+			flavs[1].pseudoflavor = RPC_AUTH_NULL;
+		} else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
+			nflavs = 1;
+			flavs[0].pseudoflavor
+					= svcauth_gss_flavor(exp->ex_client);
+		} else {
+			nflavs = 1;
+			flavs[0].pseudoflavor
+					= exp->ex_client->flavour->flavour;
+		}
+	}
+
+	RESERVE_SPACE(4);
+	WRITE32(nflavs);
+	ADJUST_ARGS();
+	for (i = 0; i < nflavs; i++) {
+		u32 flav = flavs[i].pseudoflavor;
+		struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
+
+		if (gm) {
+			RESERVE_SPACE(4);
+			WRITE32(RPC_AUTH_GSS);
+			ADJUST_ARGS();
+			RESERVE_SPACE(4 + gm->gm_oid.len);
+			WRITE32(gm->gm_oid.len);
+			WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
+			ADJUST_ARGS();
+			RESERVE_SPACE(4);
+			WRITE32(0); /* qop */
+			ADJUST_ARGS();
+			RESERVE_SPACE(4);
+			WRITE32(gss_pseudoflavor_to_service(gm, flav));
+			ADJUST_ARGS();
+			gss_mech_put(gm);
+		} else {
+			RESERVE_SPACE(4);
+			WRITE32(flav);
+			ADJUST_ARGS();
+		}
+	}
+out:
+	if (exp)
+		exp_put(exp);
+}
+
 /*
  * The SETATTR encode routine is special -- it always encodes a bitmap,
  * regardless of the error status.
@@ -2559,6 +2655,9 @@ nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
 		break;
 	case OP_SAVEFH:
 		break;
+	case OP_SECINFO:
+		nfsd4_encode_secinfo(resp, op->status, &op->u.secinfo);
+		break;
 	case OP_SETATTR:
 		nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
 		break;
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 71c686d..baac89d 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -35,7 +35,6 @@
 #include <linux/nfsd/cache.h>
 #include <linux/nfsd/xdr.h>
 #include <linux/nfsd/syscall.h>
-#include <linux/nfsd/interface.h>
 
 #include <asm/uaccess.h>
 
@@ -245,7 +244,7 @@ static ssize_t write_getfs(struct file *file, char *buf, size_t size)
 	}
 	exp_readunlock();
 	if (err == 0)
-		err = res->fh_size + (int)&((struct knfsd_fh*)0)->fh_base;
+		err = res->fh_size + offsetof(struct knfsd_fh, fh_base);
  out:
 	return err;
 }
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 6ca2d24..0eb464a 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -15,10 +15,12 @@
 #include <linux/string.h>
 #include <linux/stat.h>
 #include <linux/dcache.h>
+#include <linux/exportfs.h>
 #include <linux/mount.h>
 
 #include <linux/sunrpc/clnt.h>
 #include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/svcauth_gss.h>
 #include <linux/nfsd/nfsd.h>
 
 #define NFSDDBG_FACILITY		NFSDDBG_FH
@@ -27,10 +29,6 @@
 static int nfsd_nr_verified;
 static int nfsd_nr_put;
 
-extern struct export_operations export_op_default;
-
-#define	CALL(ops,fun) ((ops->fun)?(ops->fun):export_op_default.fun)
-
 /*
  * our acceptability function.
  * if NOSUBTREECHECK, accept anything
@@ -123,8 +121,6 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, int access)
 		int data_left = fh->fh_size/4;
 
 		error = nfserr_stale;
-		if (rqstp->rq_client == NULL)
-			goto out;
 		if (rqstp->rq_vers > 2)
 			error = nfserr_badhandle;
 		if (rqstp->rq_vers == 4 && fh->fh_size == 0)
@@ -148,7 +144,7 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, int access)
 				fh->fh_fsid[1] = fh->fh_fsid[2];
 			}
 			if ((data_left -= len)<0) goto out;
-			exp = exp_find(rqstp->rq_client, fh->fh_fsid_type, datap, &rqstp->rq_chandle);
+			exp = rqst_exp_find(rqstp, fh->fh_fsid_type, datap);
 			datap += len;
 		} else {
 			dev_t xdev;
@@ -159,19 +155,17 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, int access)
 			xdev = old_decode_dev(fh->ofh_xdev);
 			xino = u32_to_ino_t(fh->ofh_xino);
 			mk_fsid(FSID_DEV, tfh, xdev, xino, 0, NULL);
-			exp = exp_find(rqstp->rq_client, FSID_DEV, tfh,
-				       &rqstp->rq_chandle);
+			exp = rqst_exp_find(rqstp, FSID_DEV, tfh);
 		}
 
-		if (IS_ERR(exp) && (PTR_ERR(exp) == -EAGAIN
-				|| PTR_ERR(exp) == -ETIMEDOUT)) {
-			error = nfserrno(PTR_ERR(exp));
+		error = nfserr_stale;
+		if (PTR_ERR(exp) == -ENOENT)
 			goto out;
-		}
 
-		error = nfserr_stale; 
-		if (!exp || IS_ERR(exp))
+		if (IS_ERR(exp)) {
+			error = nfserrno(PTR_ERR(exp));
 			goto out;
+		}
 
 		/* Check if the request originated from a secure port. */
 		error = nfserr_perm;
@@ -211,11 +205,9 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, int access)
 		if (fileid_type == 0)
 			dentry = dget(exp->ex_dentry);
 		else {
-			struct export_operations *nop = exp->ex_mnt->mnt_sb->s_export_op;
-			dentry = CALL(nop,decode_fh)(exp->ex_mnt->mnt_sb,
-						     datap, data_left,
-						     fileid_type,
-						     nfsd_acceptable, exp);
+			dentry = exportfs_decode_fh(exp->ex_mnt, datap,
+					data_left, fileid_type,
+					nfsd_acceptable, exp);
 		}
 		if (dentry == NULL)
 			goto out;
@@ -257,8 +249,19 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, int access)
 	if (error)
 		goto out;
 
+	if (!(access & MAY_LOCK)) {
+		/*
+		 * pseudoflavor restrictions are not enforced on NLM,
+		 * which clients virtually always use auth_sys for,
+		 * even while using RPCSEC_GSS for NFS.
+		 */
+		error = check_nfsd_access(exp, rqstp);
+		if (error)
+			goto out;
+	}
+
 	/* Finally, check access permissions. */
-	error = nfsd_permission(exp, dentry, access);
+	error = nfsd_permission(rqstp, exp, dentry, access);
 
 	if (error) {
 		dprintk("fh_verify: %s/%s permission failure, "
@@ -286,15 +289,13 @@ out:
 static inline int _fh_update(struct dentry *dentry, struct svc_export *exp,
 			     __u32 *datap, int *maxsize)
 {
-	struct export_operations *nop = exp->ex_mnt->mnt_sb->s_export_op;
-
 	if (dentry == exp->ex_dentry) {
 		*maxsize = 0;
 		return 0;
 	}
 
-	return CALL(nop,encode_fh)(dentry, datap, maxsize,
-			  !(exp->ex_flags&NFSEXP_NOSUBTREECHECK));
+	return exportfs_encode_fh(dentry, datap, maxsize,
+			  !(exp->ex_flags & NFSEXP_NOSUBTREECHECK));
 }
 
 /*
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index b2c7147..977a71f 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -278,7 +278,8 @@ nfsd_proc_create(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
 					 *   echo thing > device-special-file-or-pipe
 					 * by doing a CREATE with type==0
 					 */
-					nfserr = nfsd_permission(newfhp->fh_export,
+					nfserr = nfsd_permission(rqstp,
+								 newfhp->fh_export,
 								 newfhp->fh_dentry,
 								 MAY_WRITE|MAY_LOCAL_ACCESS);
 					if (nfserr && nfserr != nfserr_rofs)
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index ff55950..a8c89ae 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -19,6 +19,7 @@
 #include <linux/slab.h>
 #include <linux/smp.h>
 #include <linux/smp_lock.h>
+#include <linux/freezer.h>
 #include <linux/fs_struct.h>
 
 #include <linux/sunrpc/types.h>
@@ -432,6 +433,7 @@ nfsd(struct svc_rqst *rqstp)
 	 * dirty pages.
 	 */
 	current->flags |= PF_LESS_THROTTLE;
+	set_freezable();
 
 	/*
 	 * The main request loop
@@ -492,6 +494,15 @@ out:
 	module_put_and_exit(0);
 }
 
+static __be32 map_new_errors(u32 vers, __be32 nfserr)
+{
+	if (nfserr == nfserr_jukebox && vers == 2)
+		return nfserr_dropit;
+	if (nfserr == nfserr_wrongsec && vers < 4)
+		return nfserr_acces;
+	return nfserr;
+}
+
 int
 nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
 {
@@ -534,6 +545,7 @@ nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
 
 	/* Now call the procedure handler, and encode NFS status. */
 	nfserr = proc->pc_func(rqstp, rqstp->rq_argp, rqstp->rq_resp);
+	nfserr = map_new_errors(rqstp->rq_vers, nfserr);
 	if (nfserr == nfserr_jukebox && rqstp->rq_vers == 2)
 		nfserr = nfserr_dropit;
 	if (nfserr == nfserr_dropit) {
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 7e6aa24..e90f4a8 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -23,7 +23,7 @@
 #include <linux/file.h>
 #include <linux/mount.h>
 #include <linux/major.h>
-#include <linux/ext2_fs.h>
+#include <linux/splice.h>
 #include <linux/proc_fs.h>
 #include <linux/stat.h>
 #include <linux/fcntl.h>
@@ -113,7 +113,7 @@ nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
 
 	while (follow_down(&mnt,&mounts)&&d_mountpoint(mounts));
 
-	exp2 = exp_get_by_name(exp->ex_client, mnt, mounts, &rqstp->rq_chandle);
+	exp2 = rqst_exp_get_by_name(rqstp, mnt, mounts);
 	if (IS_ERR(exp2)) {
 		err = PTR_ERR(exp2);
 		dput(mounts);
@@ -135,21 +135,10 @@ out:
 	return err;
 }
 
-/*
- * Look up one component of a pathname.
- * N.B. After this call _both_ fhp and resfh need an fh_put
- *
- * If the lookup would cross a mountpoint, and the mounted filesystem
- * is exported to the client with NFSEXP_NOHIDE, then the lookup is
- * accepted as it stands and the mounted directory is
- * returned. Otherwise the covered directory is returned.
- * NOTE: this mountpoint crossing is not supported properly by all
- *   clients and is explicitly disallowed for NFSv3
- *      NeilBrown <neilb@cse.unsw.edu.au>
- */
 __be32
-nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name,
-					int len, struct svc_fh *resfh)
+nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp,
+		   const char *name, int len,
+		   struct svc_export **exp_ret, struct dentry **dentry_ret)
 {
 	struct svc_export	*exp;
 	struct dentry		*dparent;
@@ -168,8 +157,6 @@ nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name,
 	exp  = fhp->fh_export;
 	exp_get(exp);
 
-	err = nfserr_acces;
-
 	/* Lookup the name, but don't follow links */
 	if (isdotent(name, len)) {
 		if (len==1)
@@ -190,17 +177,15 @@ nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name,
 			dput(dentry);
 			dentry = dp;
 
-			exp2 = exp_parent(exp->ex_client, mnt, dentry,
-					  &rqstp->rq_chandle);
-			if (IS_ERR(exp2)) {
+			exp2 = rqst_exp_parent(rqstp, mnt, dentry);
+			if (PTR_ERR(exp2) == -ENOENT) {
+				dput(dentry);
+				dentry = dget(dparent);
+			} else if (IS_ERR(exp2)) {
 				host_err = PTR_ERR(exp2);
 				dput(dentry);
 				mntput(mnt);
 				goto out_nfserr;
-			}
-			if (!exp2) {
-				dput(dentry);
-				dentry = dget(dparent);
 			} else {
 				exp_put(exp);
 				exp = exp2;
@@ -223,6 +208,41 @@ nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name,
 			}
 		}
 	}
+	*dentry_ret = dentry;
+	*exp_ret = exp;
+	return 0;
+
+out_nfserr:
+	exp_put(exp);
+	return nfserrno(host_err);
+}
+
+/*
+ * Look up one component of a pathname.
+ * N.B. After this call _both_ fhp and resfh need an fh_put
+ *
+ * If the lookup would cross a mountpoint, and the mounted filesystem
+ * is exported to the client with NFSEXP_NOHIDE, then the lookup is
+ * accepted as it stands and the mounted directory is
+ * returned. Otherwise the covered directory is returned.
+ * NOTE: this mountpoint crossing is not supported properly by all
+ *   clients and is explicitly disallowed for NFSv3
+ *      NeilBrown <neilb@cse.unsw.edu.au>
+ */
+__be32
+nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name,
+					int len, struct svc_fh *resfh)
+{
+	struct svc_export	*exp;
+	struct dentry		*dentry;
+	__be32 err;
+
+	err = nfsd_lookup_dentry(rqstp, fhp, name, len, &exp, &dentry);
+	if (err)
+		return err;
+	err = check_nfsd_access(exp, rqstp);
+	if (err)
+		goto out;
 	/*
 	 * Note: we compose the file handle now, but as the
 	 * dentry may be negative, it may need to be updated.
@@ -230,16 +250,13 @@ nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name,
 	err = fh_compose(resfh, exp, dentry, fhp);
 	if (!err && !dentry->d_inode)
 		err = nfserr_noent;
-	dput(dentry);
 out:
+	dput(dentry);
 	exp_put(exp);
 	return err;
-
-out_nfserr:
-	err = nfserrno(host_err);
-	goto out;
 }
 
+
 /*
  * Set various file attributes.
  * N.B. After this call fhp needs an fh_put
@@ -311,7 +328,7 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
 	/* The size case is special. It changes the file as well as the attributes.  */
 	if (iap->ia_valid & ATTR_SIZE) {
 		if (iap->ia_size < inode->i_size) {
-			err = nfsd_permission(fhp->fh_export, dentry, MAY_TRUNC|MAY_OWNER_OVERRIDE);
+			err = nfsd_permission(rqstp, fhp->fh_export, dentry, MAY_TRUNC|MAY_OWNER_OVERRIDE);
 			if (err)
 				goto out;
 		}
@@ -435,7 +452,7 @@ nfsd4_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
 	/* Get inode */
 	error = fh_verify(rqstp, fhp, 0 /* S_IFREG */, MAY_SATTR);
 	if (error)
-		goto out;
+		return error;
 
 	dentry = fhp->fh_dentry;
 	inode = dentry->d_inode;
@@ -444,33 +461,25 @@ nfsd4_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
 
 	host_error = nfs4_acl_nfsv4_to_posix(acl, &pacl, &dpacl, flags);
 	if (host_error == -EINVAL) {
-		error = nfserr_attrnotsupp;
-		goto out;
+		return nfserr_attrnotsupp;
 	} else if (host_error < 0)
 		goto out_nfserr;
 
 	host_error = set_nfsv4_acl_one(dentry, pacl, POSIX_ACL_XATTR_ACCESS);
 	if (host_error < 0)
-		goto out_nfserr;
+		goto out_release;
 
-	if (S_ISDIR(inode->i_mode)) {
+	if (S_ISDIR(inode->i_mode))
 		host_error = set_nfsv4_acl_one(dentry, dpacl, POSIX_ACL_XATTR_DEFAULT);
-		if (host_error < 0)
-			goto out_nfserr;
-	}
 
-	error = nfs_ok;
-
-out:
+out_release:
 	posix_acl_release(pacl);
 	posix_acl_release(dpacl);
-	return (error);
 out_nfserr:
 	if (host_error == -EOPNOTSUPP)
-		error = nfserr_attrnotsupp;
+		return nfserr_attrnotsupp;
 	else
-		error = nfserrno(host_error);
-	goto out;
+		return nfserrno(host_error);
 }
 
 static struct posix_acl *
@@ -607,7 +616,7 @@ nfsd_access(struct svc_rqst *rqstp, struct svc_fh *fhp, u32 *access, u32 *suppor
 
 			sresult |= map->access;
 
-			err2 = nfsd_permission(export, dentry, map->how);
+			err2 = nfsd_permission(rqstp, export, dentry, map->how);
 			switch (err2) {
 			case nfs_ok:
 				result |= map->access;
@@ -801,26 +810,32 @@ found:
 }
 
 /*
- * Grab and keep cached pages assosiated with a file in the svc_rqst
- * so that they can be passed to the netowork sendmsg/sendpage routines
- * directrly. They will be released after the sending has completed.
+ * Grab and keep cached pages associated with a file in the svc_rqst
+ * so that they can be passed to the network sendmsg/sendpage routines
+ * directly. They will be released after the sending has completed.
  */
 static int
-nfsd_read_actor(read_descriptor_t *desc, struct page *page, unsigned long offset , unsigned long size)
+nfsd_splice_actor(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
+		  struct splice_desc *sd)
 {
-	unsigned long count = desc->count;
-	struct svc_rqst *rqstp = desc->arg.data;
+	struct svc_rqst *rqstp = sd->u.data;
 	struct page **pp = rqstp->rq_respages + rqstp->rq_resused;
+	struct page *page = buf->page;
+	size_t size;
+	int ret;
+
+	ret = buf->ops->confirm(pipe, buf);
+	if (unlikely(ret))
+		return ret;
 
-	if (size > count)
-		size = count;
+	size = sd->len;
 
 	if (rqstp->rq_res.page_len == 0) {
 		get_page(page);
 		put_page(*pp);
 		*pp = page;
 		rqstp->rq_resused++;
-		rqstp->rq_res.page_base = offset;
+		rqstp->rq_res.page_base = buf->offset;
 		rqstp->rq_res.page_len = size;
 	} else if (page != pp[-1]) {
 		get_page(page);
@@ -832,11 +847,15 @@ nfsd_read_actor(read_descriptor_t *desc, struct page *page, unsigned long offset
 	} else
 		rqstp->rq_res.page_len += size;
 
-	desc->count = count - size;
-	desc->written += size;
 	return size;
 }
 
+static int nfsd_direct_splice_actor(struct pipe_inode_info *pipe,
+				    struct splice_desc *sd)
+{
+	return __splice_from_pipe(pipe, sd, nfsd_splice_actor);
+}
+
 static __be32
 nfsd_vfs_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
               loff_t offset, struct kvec *vec, int vlen, unsigned long *count)
@@ -861,10 +880,16 @@ nfsd_vfs_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
 	if (ra && ra->p_set)
 		file->f_ra = ra->p_ra;
 
-	if (file->f_op->sendfile && rqstp->rq_sendfile_ok) {
+	if (file->f_op->splice_read && rqstp->rq_splice_ok) {
+		struct splice_desc sd = {
+			.len		= 0,
+			.total_len	= *count,
+			.pos		= offset,
+			.u.data		= rqstp,
+		};
+
 		rqstp->rq_resused = 1;
-		host_err = file->f_op->sendfile(file, &offset, *count,
-						 nfsd_read_actor, rqstp);
+		host_err = splice_direct_to_actor(file, &sd, nfsd_direct_splice_actor);
 	} else {
 		oldfs = get_fs();
 		set_fs(KERNEL_DS);
@@ -1018,7 +1043,7 @@ nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
 	__be32		err;
 
 	if (file) {
-		err = nfsd_permission(fhp->fh_export, fhp->fh_dentry,
+		err = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,
 				MAY_READ|MAY_OWNER_OVERRIDE);
 		if (err)
 			goto out;
@@ -1047,7 +1072,7 @@ nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
 	__be32			err = 0;
 
 	if (file) {
-		err = nfsd_permission(fhp->fh_export, fhp->fh_dentry,
+		err = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,
 				MAY_WRITE|MAY_OWNER_OVERRIDE);
 		if (err)
 			goto out;
@@ -1776,7 +1801,8 @@ nfsd_statfs(struct svc_rqst *rqstp, struct svc_fh *fhp, struct kstatfs *stat)
  * Check for a user's access permissions to this inode.
  */
 __be32
-nfsd_permission(struct svc_export *exp, struct dentry *dentry, int acc)
+nfsd_permission(struct svc_rqst *rqstp, struct svc_export *exp,
+					struct dentry *dentry, int acc)
 {
 	struct inode	*inode = dentry->d_inode;
 	int		err;
@@ -1807,7 +1833,7 @@ nfsd_permission(struct svc_export *exp, struct dentry *dentry, int acc)
 	 */
 	if (!(acc & MAY_LOCAL_ACCESS))
 		if (acc & (MAY_WRITE | MAY_SATTR | MAY_TRUNC)) {
-			if (EX_RDONLY(exp) || IS_RDONLY(inode))
+			if (EX_RDONLY(exp, rqstp) || IS_RDONLY(inode))
 				return nfserr_rofs;
 			if (/* (acc & MAY_WRITE) && */ IS_IMMUTABLE(inode))
 				return nfserr_perm;
diff --git a/fs/nls/Makefile b/fs/nls/Makefile
index a7ade13..f499dd7 100644
--- a/fs/nls/Makefile
+++ b/fs/nls/Makefile
@@ -36,11 +36,9 @@ obj-$(CONFIG_NLS_ISO8859_6)	+= nls_iso8859-6.o
 obj-$(CONFIG_NLS_ISO8859_7)	+= nls_iso8859-7.o
 obj-$(CONFIG_NLS_ISO8859_8)	+= nls_cp1255.o
 obj-$(CONFIG_NLS_ISO8859_9)	+= nls_iso8859-9.o
-obj-$(CONFIG_NLS_ISO8859_10)	+= nls_iso8859-10.o
 obj-$(CONFIG_NLS_ISO8859_13)	+= nls_iso8859-13.o
 obj-$(CONFIG_NLS_ISO8859_14)	+= nls_iso8859-14.o
 obj-$(CONFIG_NLS_ISO8859_15)	+= nls_iso8859-15.o
 obj-$(CONFIG_NLS_KOI8_R)	+= nls_koi8-r.o
 obj-$(CONFIG_NLS_KOI8_U)	+= nls_koi8-u.o nls_koi8-ru.o
-obj-$(CONFIG_NLS_ABC)		+= nls_abc.o
 obj-$(CONFIG_NLS_UTF8)		+= nls_utf8.o
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 7ed5639..ffcc504 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -2276,7 +2276,7 @@ const struct file_operations ntfs_file_ops = {
 						    mounted filesystem. */
 	.mmap		= generic_file_mmap,	 /* Mmap file. */
 	.open		= ntfs_file_open,	 /* Open file. */
-	.sendfile	= generic_file_sendfile, /* Zero-copy data send with
+	.splice_read	= generic_file_splice_read /* Zero-copy data send with
 						    the data source being on
 						    the ntfs partition.  We do
 						    not need to care about the
diff --git a/fs/ntfs/namei.c b/fs/ntfs/namei.c
index bff01a5..e93c614 100644
--- a/fs/ntfs/namei.c
+++ b/fs/ntfs/namei.c
@@ -21,6 +21,7 @@
  */
 
 #include <linux/dcache.h>
+#include <linux/exportfs.h>
 #include <linux/security.h>
 
 #include "attrib.h"
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index 19712a7..f5e11f4 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -50,6 +50,8 @@
 #include "buffer_head_io.h"
 
 static void ocfs2_free_truncate_context(struct ocfs2_truncate_context *tc);
+static int ocfs2_cache_extent_block_free(struct ocfs2_cached_dealloc_ctxt *ctxt,
+					 struct ocfs2_extent_block *eb);
 
 /*
  * Structures which describe a path through a btree, and functions to
@@ -117,6 +119,31 @@ static void ocfs2_free_path(struct ocfs2_path *path)
 }
 
 /*
+ * All the elements of src into dest. After this call, src could be freed
+ * without affecting dest.
+ *
+ * Both paths should have the same root. Any non-root elements of dest
+ * will be freed.
+ */
+static void ocfs2_cp_path(struct ocfs2_path *dest, struct ocfs2_path *src)
+{
+	int i;
+
+	BUG_ON(path_root_bh(dest) != path_root_bh(src));
+	BUG_ON(path_root_el(dest) != path_root_el(src));
+
+	ocfs2_reinit_path(dest, 1);
+
+	for(i = 1; i < OCFS2_MAX_PATH_DEPTH; i++) {
+		dest->p_node[i].bh = src->p_node[i].bh;
+		dest->p_node[i].el = src->p_node[i].el;
+
+		if (dest->p_node[i].bh)
+			get_bh(dest->p_node[i].bh);
+	}
+}
+
+/*
  * Make the *dest path the same as src and re-initialize src path to
  * have a root only.
  */
@@ -212,10 +239,41 @@ out:
 	return ret;
 }
 
+/*
+ * Return the index of the extent record which contains cluster #v_cluster.
+ * -1 is returned if it was not found.
+ *
+ * Should work fine on interior and exterior nodes.
+ */
+int ocfs2_search_extent_list(struct ocfs2_extent_list *el, u32 v_cluster)
+{
+	int ret = -1;
+	int i;
+	struct ocfs2_extent_rec *rec;
+	u32 rec_end, rec_start, clusters;
+
+	for(i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) {
+		rec = &el->l_recs[i];
+
+		rec_start = le32_to_cpu(rec->e_cpos);
+		clusters = ocfs2_rec_clusters(el, rec);
+
+		rec_end = rec_start + clusters;
+
+		if (v_cluster >= rec_start && v_cluster < rec_end) {
+			ret = i;
+			break;
+		}
+	}
+
+	return ret;
+}
+
 enum ocfs2_contig_type {
 	CONTIG_NONE = 0,
 	CONTIG_LEFT,
-	CONTIG_RIGHT
+	CONTIG_RIGHT,
+	CONTIG_LEFTRIGHT,
 };
 
 
@@ -253,6 +311,14 @@ static enum ocfs2_contig_type
 {
 	u64 blkno = le64_to_cpu(insert_rec->e_blkno);
 
+	/*
+	 * Refuse to coalesce extent records with different flag
+	 * fields - we don't want to mix unwritten extents with user
+	 * data.
+	 */
+	if (ext->e_flags != insert_rec->e_flags)
+		return CONTIG_NONE;
+
 	if (ocfs2_extents_adjacent(ext, insert_rec) &&
 	    ocfs2_block_extent_contig(inode->i_sb, ext, blkno))
 			return CONTIG_RIGHT;
@@ -277,7 +343,14 @@ enum ocfs2_append_type {
 	APPEND_TAIL,
 };
 
+enum ocfs2_split_type {
+	SPLIT_NONE = 0,
+	SPLIT_LEFT,
+	SPLIT_RIGHT,
+};
+
 struct ocfs2_insert_type {
+	enum ocfs2_split_type	ins_split;
 	enum ocfs2_append_type	ins_appending;
 	enum ocfs2_contig_type	ins_contig;
 	int			ins_contig_index;
@@ -285,6 +358,13 @@ struct ocfs2_insert_type {
 	int			ins_tree_depth;
 };
 
+struct ocfs2_merge_ctxt {
+	enum ocfs2_contig_type	c_contig_type;
+	int			c_has_empty_extent;
+	int			c_split_covers_rec;
+	int			c_used_tail_recs;
+};
+
 /*
  * How many free extents have we got before we need more meta data?
  */
@@ -384,13 +464,7 @@ static int ocfs2_create_new_meta_bhs(struct ocfs2_super *osb,
 			strcpy(eb->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE);
 			eb->h_blkno = cpu_to_le64(first_blkno);
 			eb->h_fs_generation = cpu_to_le32(osb->fs_generation);
-
-#ifndef OCFS2_USE_ALL_METADATA_SUBALLOCATORS
-			/* we always use slot zero's suballocator */
-			eb->h_suballoc_slot = 0;
-#else
 			eb->h_suballoc_slot = cpu_to_le16(osb->slot_num);
-#endif
 			eb->h_suballoc_bit = cpu_to_le16(suballoc_bit_start);
 			eb->h_list.l_count =
 				cpu_to_le16(ocfs2_extent_recs_per_eb(osb->sb));
@@ -461,7 +535,7 @@ static int ocfs2_add_branch(struct ocfs2_super *osb,
 			    struct inode *inode,
 			    struct buffer_head *fe_bh,
 			    struct buffer_head *eb_bh,
-			    struct buffer_head *last_eb_bh,
+			    struct buffer_head **last_eb_bh,
 			    struct ocfs2_alloc_context *meta_ac)
 {
 	int status, new_blocks, i;
@@ -476,7 +550,7 @@ static int ocfs2_add_branch(struct ocfs2_super *osb,
 
 	mlog_entry_void();
 
-	BUG_ON(!last_eb_bh);
+	BUG_ON(!last_eb_bh || !*last_eb_bh);
 
 	fe = (struct ocfs2_dinode *) fe_bh->b_data;
 
@@ -507,7 +581,7 @@ static int ocfs2_add_branch(struct ocfs2_super *osb,
 		goto bail;
 	}
 
-	eb = (struct ocfs2_extent_block *)last_eb_bh->b_data;
+	eb = (struct ocfs2_extent_block *)(*last_eb_bh)->b_data;
 	new_cpos = ocfs2_sum_rightmost_rec(&eb->h_list);
 
 	/* Note: new_eb_bhs[new_blocks - 1] is the guy which will be
@@ -568,7 +642,7 @@ static int ocfs2_add_branch(struct ocfs2_super *osb,
 	 * journal_dirty erroring as it won't unless we've aborted the
 	 * handle (in which case we would never be here) so reserving
 	 * the write with journal_access is all we need to do. */
-	status = ocfs2_journal_access(handle, inode, last_eb_bh,
+	status = ocfs2_journal_access(handle, inode, *last_eb_bh,
 				      OCFS2_JOURNAL_ACCESS_WRITE);
 	if (status < 0) {
 		mlog_errno(status);
@@ -601,10 +675,10 @@ static int ocfs2_add_branch(struct ocfs2_super *osb,
 	 * next_leaf on the previously last-extent-block. */
 	fe->i_last_eb_blk = cpu_to_le64(new_last_eb_blk);
 
-	eb = (struct ocfs2_extent_block *) last_eb_bh->b_data;
+	eb = (struct ocfs2_extent_block *) (*last_eb_bh)->b_data;
 	eb->h_next_leaf_blk = cpu_to_le64(new_last_eb_blk);
 
-	status = ocfs2_journal_dirty(handle, last_eb_bh);
+	status = ocfs2_journal_dirty(handle, *last_eb_bh);
 	if (status < 0)
 		mlog_errno(status);
 	status = ocfs2_journal_dirty(handle, fe_bh);
@@ -616,6 +690,14 @@ static int ocfs2_add_branch(struct ocfs2_super *osb,
 			mlog_errno(status);
 	}
 
+	/*
+	 * Some callers want to track the rightmost leaf so pass it
+	 * back here.
+	 */
+	brelse(*last_eb_bh);
+	get_bh(new_eb_bhs[0]);
+	*last_eb_bh = new_eb_bhs[0];
+
 	status = 0;
 bail:
 	if (new_eb_bhs) {
@@ -829,6 +911,87 @@ bail:
 }
 
 /*
+ * Grow a b-tree so that it has more records.
+ *
+ * We might shift the tree depth in which case existing paths should
+ * be considered invalid.
+ *
+ * Tree depth after the grow is returned via *final_depth.
+ *
+ * *last_eb_bh will be updated by ocfs2_add_branch().
+ */
+static int ocfs2_grow_tree(struct inode *inode, handle_t *handle,
+			   struct buffer_head *di_bh, int *final_depth,
+			   struct buffer_head **last_eb_bh,
+			   struct ocfs2_alloc_context *meta_ac)
+{
+	int ret, shift;
+	struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+	int depth = le16_to_cpu(di->id2.i_list.l_tree_depth);
+	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+	struct buffer_head *bh = NULL;
+
+	BUG_ON(meta_ac == NULL);
+
+	shift = ocfs2_find_branch_target(osb, inode, di_bh, &bh);
+	if (shift < 0) {
+		ret = shift;
+		mlog_errno(ret);
+		goto out;
+	}
+
+	/* We traveled all the way to the bottom of the allocation tree
+	 * and didn't find room for any more extents - we need to add
+	 * another tree level */
+	if (shift) {
+		BUG_ON(bh);
+		mlog(0, "need to shift tree depth (current = %d)\n", depth);
+
+		/* ocfs2_shift_tree_depth will return us a buffer with
+		 * the new extent block (so we can pass that to
+		 * ocfs2_add_branch). */
+		ret = ocfs2_shift_tree_depth(osb, handle, inode, di_bh,
+					     meta_ac, &bh);
+		if (ret < 0) {
+			mlog_errno(ret);
+			goto out;
+		}
+		depth++;
+		if (depth == 1) {
+			/*
+			 * Special case: we have room now if we shifted from
+			 * tree_depth 0, so no more work needs to be done.
+			 *
+			 * We won't be calling add_branch, so pass
+			 * back *last_eb_bh as the new leaf. At depth
+			 * zero, it should always be null so there's
+			 * no reason to brelse.
+			 */
+			BUG_ON(*last_eb_bh);
+			get_bh(bh);
+			*last_eb_bh = bh;
+			goto out;
+		}
+	}
+
+	/* call ocfs2_add_branch to add the final part of the tree with
+	 * the new data. */
+	mlog(0, "add branch. bh = %p\n", bh);
+	ret = ocfs2_add_branch(osb, handle, inode, di_bh, bh, last_eb_bh,
+			       meta_ac);
+	if (ret < 0) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+out:
+	if (final_depth)
+		*final_depth = depth;
+	brelse(bh);
+	return ret;
+}
+
+/*
  * This is only valid for leaf nodes, which are the only ones that can
  * have empty extents anyway.
  */
@@ -934,6 +1097,22 @@ static void ocfs2_rotate_leaf(struct ocfs2_extent_list *el,
 
 }
 
+static void ocfs2_remove_empty_extent(struct ocfs2_extent_list *el)
+{
+	int size, num_recs = le16_to_cpu(el->l_next_free_rec);
+
+	BUG_ON(num_recs == 0);
+
+	if (ocfs2_is_empty_extent(&el->l_recs[0])) {
+		num_recs--;
+		size = num_recs * sizeof(struct ocfs2_extent_rec);
+		memmove(&el->l_recs[0], &el->l_recs[1], size);
+		memset(&el->l_recs[num_recs], 0,
+		       sizeof(struct ocfs2_extent_rec));
+		el->l_next_free_rec = cpu_to_le16(num_recs);
+	}
+}
+
 /*
  * Create an empty extent record .
  *
@@ -1211,6 +1390,10 @@ static void ocfs2_adjust_adjacent_records(struct ocfs2_extent_rec *left_rec,
 	 * immediately to their right.
 	 */
 	left_clusters = le32_to_cpu(right_child_el->l_recs[0].e_cpos);
+	if (ocfs2_is_empty_extent(&right_child_el->l_recs[0])) {
+		BUG_ON(le16_to_cpu(right_child_el->l_next_free_rec) <= 1);
+		left_clusters = le32_to_cpu(right_child_el->l_recs[1].e_cpos);
+	}
 	left_clusters -= le32_to_cpu(left_rec->e_cpos);
 	left_rec->e_int_clusters = cpu_to_le32(left_clusters);
 
@@ -1531,10 +1714,16 @@ out:
 	return ret;
 }
 
+/*
+ * Extend the transaction by enough credits to complete the rotation,
+ * and still leave at least the original number of credits allocated
+ * to this transaction.
+ */
 static int ocfs2_extend_rotate_transaction(handle_t *handle, int subtree_depth,
+					   int op_credits,
 					   struct ocfs2_path *path)
 {
-	int credits = (path->p_tree_depth - subtree_depth) * 2 + 1;
+	int credits = (path->p_tree_depth - subtree_depth) * 2 + 1 + op_credits;
 
 	if (handle->h_buffer_credits < credits)
 		return ocfs2_extend_trans(handle, credits);
@@ -1568,6 +1757,29 @@ static int ocfs2_rotate_requires_path_adjustment(struct ocfs2_path *left_path,
 	return 0;
 }
 
+static int ocfs2_leftmost_rec_contains(struct ocfs2_extent_list *el, u32 cpos)
+{
+	int next_free = le16_to_cpu(el->l_next_free_rec);
+	unsigned int range;
+	struct ocfs2_extent_rec *rec;
+
+	if (next_free == 0)
+		return 0;
+
+	rec = &el->l_recs[0];
+	if (ocfs2_is_empty_extent(rec)) {
+		/* Empty list. */
+		if (next_free == 1)
+			return 0;
+		rec = &el->l_recs[1];
+	}
+
+	range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec);
+	if (cpos >= le32_to_cpu(rec->e_cpos) && cpos < range)
+		return 1;
+	return 0;
+}
+
 /*
  * Rotate all the records in a btree right one record, starting at insert_cpos.
  *
@@ -1586,11 +1798,12 @@ static int ocfs2_rotate_requires_path_adjustment(struct ocfs2_path *left_path,
  */
 static int ocfs2_rotate_tree_right(struct inode *inode,
 				   handle_t *handle,
+				   enum ocfs2_split_type split,
 				   u32 insert_cpos,
 				   struct ocfs2_path *right_path,
 				   struct ocfs2_path **ret_left_path)
 {
-	int ret, start;
+	int ret, start, orig_credits = handle->h_buffer_credits;
 	u32 cpos;
 	struct ocfs2_path *left_path = NULL;
 
@@ -1657,9 +1870,9 @@ static int ocfs2_rotate_tree_right(struct inode *inode,
 				(unsigned long long)
 				path_leaf_bh(left_path)->b_blocknr);
 
-		if (ocfs2_rotate_requires_path_adjustment(left_path,
+		if (split == SPLIT_NONE &&
+		    ocfs2_rotate_requires_path_adjustment(left_path,
 							  insert_cpos)) {
-			mlog(0, "Path adjustment required\n");
 
 			/*
 			 * We've rotated the tree as much as we
@@ -1687,7 +1900,7 @@ static int ocfs2_rotate_tree_right(struct inode *inode,
 		     right_path->p_tree_depth);
 
 		ret = ocfs2_extend_rotate_transaction(handle, start,
-						      right_path);
+						      orig_credits, right_path);
 		if (ret) {
 			mlog_errno(ret);
 			goto out;
@@ -1700,6 +1913,24 @@ static int ocfs2_rotate_tree_right(struct inode *inode,
 			goto out;
 		}
 
+		if (split != SPLIT_NONE &&
+		    ocfs2_leftmost_rec_contains(path_leaf_el(right_path),
+						insert_cpos)) {
+			/*
+			 * A rotate moves the rightmost left leaf
+			 * record over to the leftmost right leaf
+			 * slot. If we're doing an extent split
+			 * instead of a real insert, then we have to
+			 * check that the extent to be split wasn't
+			 * just moved over. If it was, then we can
+			 * exit here, passing left_path back -
+			 * ocfs2_split_extent() is smart enough to
+			 * search both leaves.
+			 */
+			*ret_left_path = left_path;
+			goto out_ret_path;
+		}
+
 		/*
 		 * There is no need to re-read the next right path
 		 * as we know that it'll be our current left
@@ -1722,6 +1953,1031 @@ out_ret_path:
 	return ret;
 }
 
+static void ocfs2_update_edge_lengths(struct inode *inode, handle_t *handle,
+				      struct ocfs2_path *path)
+{
+	int i, idx;
+	struct ocfs2_extent_rec *rec;
+	struct ocfs2_extent_list *el;
+	struct ocfs2_extent_block *eb;
+	u32 range;
+
+	/* Path should always be rightmost. */
+	eb = (struct ocfs2_extent_block *)path_leaf_bh(path)->b_data;
+	BUG_ON(eb->h_next_leaf_blk != 0ULL);
+
+	el = &eb->h_list;
+	BUG_ON(le16_to_cpu(el->l_next_free_rec) == 0);
+	idx = le16_to_cpu(el->l_next_free_rec) - 1;
+	rec = &el->l_recs[idx];
+	range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec);
+
+	for (i = 0; i < path->p_tree_depth; i++) {
+		el = path->p_node[i].el;
+		idx = le16_to_cpu(el->l_next_free_rec) - 1;
+		rec = &el->l_recs[idx];
+
+		rec->e_int_clusters = cpu_to_le32(range);
+		le32_add_cpu(&rec->e_int_clusters, -le32_to_cpu(rec->e_cpos));
+
+		ocfs2_journal_dirty(handle, path->p_node[i].bh);
+	}
+}
+
+static void ocfs2_unlink_path(struct inode *inode, handle_t *handle,
+			      struct ocfs2_cached_dealloc_ctxt *dealloc,
+			      struct ocfs2_path *path, int unlink_start)
+{
+	int ret, i;
+	struct ocfs2_extent_block *eb;
+	struct ocfs2_extent_list *el;
+	struct buffer_head *bh;
+
+	for(i = unlink_start; i < path_num_items(path); i++) {
+		bh = path->p_node[i].bh;
+
+		eb = (struct ocfs2_extent_block *)bh->b_data;
+		/*
+		 * Not all nodes might have had their final count
+		 * decremented by the caller - handle this here.
+		 */
+		el = &eb->h_list;
+		if (le16_to_cpu(el->l_next_free_rec) > 1) {
+			mlog(ML_ERROR,
+			     "Inode %llu, attempted to remove extent block "
+			     "%llu with %u records\n",
+			     (unsigned long long)OCFS2_I(inode)->ip_blkno,
+			     (unsigned long long)le64_to_cpu(eb->h_blkno),
+			     le16_to_cpu(el->l_next_free_rec));
+
+			ocfs2_journal_dirty(handle, bh);
+			ocfs2_remove_from_cache(inode, bh);
+			continue;
+		}
+
+		el->l_next_free_rec = 0;
+		memset(&el->l_recs[0], 0, sizeof(struct ocfs2_extent_rec));
+
+		ocfs2_journal_dirty(handle, bh);
+
+		ret = ocfs2_cache_extent_block_free(dealloc, eb);
+		if (ret)
+			mlog_errno(ret);
+
+		ocfs2_remove_from_cache(inode, bh);
+	}
+}
+
+static void ocfs2_unlink_subtree(struct inode *inode, handle_t *handle,
+				 struct ocfs2_path *left_path,
+				 struct ocfs2_path *right_path,
+				 int subtree_index,
+				 struct ocfs2_cached_dealloc_ctxt *dealloc)
+{
+	int i;
+	struct buffer_head *root_bh = left_path->p_node[subtree_index].bh;
+	struct ocfs2_extent_list *root_el = left_path->p_node[subtree_index].el;
+	struct ocfs2_extent_list *el;
+	struct ocfs2_extent_block *eb;
+
+	el = path_leaf_el(left_path);
+
+	eb = (struct ocfs2_extent_block *)right_path->p_node[subtree_index + 1].bh->b_data;
+
+	for(i = 1; i < le16_to_cpu(root_el->l_next_free_rec); i++)
+		if (root_el->l_recs[i].e_blkno == eb->h_blkno)
+			break;
+
+	BUG_ON(i >= le16_to_cpu(root_el->l_next_free_rec));
+
+	memset(&root_el->l_recs[i], 0, sizeof(struct ocfs2_extent_rec));
+	le16_add_cpu(&root_el->l_next_free_rec, -1);
+
+	eb = (struct ocfs2_extent_block *)path_leaf_bh(left_path)->b_data;
+	eb->h_next_leaf_blk = 0;
+
+	ocfs2_journal_dirty(handle, root_bh);
+	ocfs2_journal_dirty(handle, path_leaf_bh(left_path));
+
+	ocfs2_unlink_path(inode, handle, dealloc, right_path,
+			  subtree_index + 1);
+}
+
+static int ocfs2_rotate_subtree_left(struct inode *inode, handle_t *handle,
+				     struct ocfs2_path *left_path,
+				     struct ocfs2_path *right_path,
+				     int subtree_index,
+				     struct ocfs2_cached_dealloc_ctxt *dealloc,
+				     int *deleted)
+{
+	int ret, i, del_right_subtree = 0, right_has_empty = 0;
+	struct buffer_head *root_bh, *di_bh = path_root_bh(right_path);
+	struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+	struct ocfs2_extent_list *right_leaf_el, *left_leaf_el;
+	struct ocfs2_extent_block *eb;
+
+	*deleted = 0;
+
+	right_leaf_el = path_leaf_el(right_path);
+	left_leaf_el = path_leaf_el(left_path);
+	root_bh = left_path->p_node[subtree_index].bh;
+	BUG_ON(root_bh != right_path->p_node[subtree_index].bh);
+
+	if (!ocfs2_is_empty_extent(&left_leaf_el->l_recs[0]))
+		return 0;
+
+	eb = (struct ocfs2_extent_block *)path_leaf_bh(right_path)->b_data;
+	if (ocfs2_is_empty_extent(&right_leaf_el->l_recs[0])) {
+		/*
+		 * It's legal for us to proceed if the right leaf is
+		 * the rightmost one and it has an empty extent. There
+		 * are two cases to handle - whether the leaf will be
+		 * empty after removal or not. If the leaf isn't empty
+		 * then just remove the empty extent up front. The
+		 * next block will handle empty leaves by flagging
+		 * them for unlink.
+		 *
+		 * Non rightmost leaves will throw -EAGAIN and the
+		 * caller can manually move the subtree and retry.
+		 */
+
+		if (eb->h_next_leaf_blk != 0ULL)
+			return -EAGAIN;
+
+		if (le16_to_cpu(right_leaf_el->l_next_free_rec) > 1) {
+			ret = ocfs2_journal_access(handle, inode,
+						   path_leaf_bh(right_path),
+						   OCFS2_JOURNAL_ACCESS_WRITE);
+			if (ret) {
+				mlog_errno(ret);
+				goto out;
+			}
+
+			ocfs2_remove_empty_extent(right_leaf_el);
+		} else
+			right_has_empty = 1;
+	}
+
+	if (eb->h_next_leaf_blk == 0ULL &&
+	    le16_to_cpu(right_leaf_el->l_next_free_rec) == 1) {
+		/*
+		 * We have to update i_last_eb_blk during the meta
+		 * data delete.
+		 */
+		ret = ocfs2_journal_access(handle, inode, di_bh,
+					   OCFS2_JOURNAL_ACCESS_WRITE);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		del_right_subtree = 1;
+	}
+
+	/*
+	 * Getting here with an empty extent in the right path implies
+	 * that it's the rightmost path and will be deleted.
+	 */
+	BUG_ON(right_has_empty && !del_right_subtree);
+
+	ret = ocfs2_journal_access(handle, inode, root_bh,
+				   OCFS2_JOURNAL_ACCESS_WRITE);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	for(i = subtree_index + 1; i < path_num_items(right_path); i++) {
+		ret = ocfs2_journal_access(handle, inode,
+					   right_path->p_node[i].bh,
+					   OCFS2_JOURNAL_ACCESS_WRITE);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		ret = ocfs2_journal_access(handle, inode,
+					   left_path->p_node[i].bh,
+					   OCFS2_JOURNAL_ACCESS_WRITE);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+	}
+
+	if (!right_has_empty) {
+		/*
+		 * Only do this if we're moving a real
+		 * record. Otherwise, the action is delayed until
+		 * after removal of the right path in which case we
+		 * can do a simple shift to remove the empty extent.
+		 */
+		ocfs2_rotate_leaf(left_leaf_el, &right_leaf_el->l_recs[0]);
+		memset(&right_leaf_el->l_recs[0], 0,
+		       sizeof(struct ocfs2_extent_rec));
+	}
+	if (eb->h_next_leaf_blk == 0ULL) {
+		/*
+		 * Move recs over to get rid of empty extent, decrease
+		 * next_free. This is allowed to remove the last
+		 * extent in our leaf (setting l_next_free_rec to
+		 * zero) - the delete code below won't care.
+		 */
+		ocfs2_remove_empty_extent(right_leaf_el);
+	}
+
+	ret = ocfs2_journal_dirty(handle, path_leaf_bh(left_path));
+	if (ret)
+		mlog_errno(ret);
+	ret = ocfs2_journal_dirty(handle, path_leaf_bh(right_path));
+	if (ret)
+		mlog_errno(ret);
+
+	if (del_right_subtree) {
+		ocfs2_unlink_subtree(inode, handle, left_path, right_path,
+				     subtree_index, dealloc);
+		ocfs2_update_edge_lengths(inode, handle, left_path);
+
+		eb = (struct ocfs2_extent_block *)path_leaf_bh(left_path)->b_data;
+		di->i_last_eb_blk = eb->h_blkno;
+
+		/*
+		 * Removal of the extent in the left leaf was skipped
+		 * above so we could delete the right path
+		 * 1st.
+		 */
+		if (right_has_empty)
+			ocfs2_remove_empty_extent(left_leaf_el);
+
+		ret = ocfs2_journal_dirty(handle, di_bh);
+		if (ret)
+			mlog_errno(ret);
+
+		*deleted = 1;
+	} else
+		ocfs2_complete_edge_insert(inode, handle, left_path, right_path,
+					   subtree_index);
+
+out:
+	return ret;
+}
+
+/*
+ * Given a full path, determine what cpos value would return us a path
+ * containing the leaf immediately to the right of the current one.
+ *
+ * Will return zero if the path passed in is already the rightmost path.
+ *
+ * This looks similar, but is subtly different to
+ * ocfs2_find_cpos_for_left_leaf().
+ */
+static int ocfs2_find_cpos_for_right_leaf(struct super_block *sb,
+					  struct ocfs2_path *path, u32 *cpos)
+{
+	int i, j, ret = 0;
+	u64 blkno;
+	struct ocfs2_extent_list *el;
+
+	*cpos = 0;
+
+	if (path->p_tree_depth == 0)
+		return 0;
+
+	blkno = path_leaf_bh(path)->b_blocknr;
+
+	/* Start at the tree node just above the leaf and work our way up. */
+	i = path->p_tree_depth - 1;
+	while (i >= 0) {
+		int next_free;
+
+		el = path->p_node[i].el;
+
+		/*
+		 * Find the extent record just after the one in our
+		 * path.
+		 */
+		next_free = le16_to_cpu(el->l_next_free_rec);
+		for(j = 0; j < le16_to_cpu(el->l_next_free_rec); j++) {
+			if (le64_to_cpu(el->l_recs[j].e_blkno) == blkno) {
+				if (j == (next_free - 1)) {
+					if (i == 0) {
+						/*
+						 * We've determined that the
+						 * path specified is already
+						 * the rightmost one - return a
+						 * cpos of zero.
+						 */
+						goto out;
+					}
+					/*
+					 * The rightmost record points to our
+					 * leaf - we need to travel up the
+					 * tree one level.
+					 */
+					goto next_node;
+				}
+
+				*cpos = le32_to_cpu(el->l_recs[j + 1].e_cpos);
+				goto out;
+			}
+		}
+
+		/*
+		 * If we got here, we never found a valid node where
+		 * the tree indicated one should be.
+		 */
+		ocfs2_error(sb,
+			    "Invalid extent tree at extent block %llu\n",
+			    (unsigned long long)blkno);
+		ret = -EROFS;
+		goto out;
+
+next_node:
+		blkno = path->p_node[i].bh->b_blocknr;
+		i--;
+	}
+
+out:
+	return ret;
+}
+
+static int ocfs2_rotate_rightmost_leaf_left(struct inode *inode,
+					    handle_t *handle,
+					    struct buffer_head *bh,
+					    struct ocfs2_extent_list *el)
+{
+	int ret;
+
+	if (!ocfs2_is_empty_extent(&el->l_recs[0]))
+		return 0;
+
+	ret = ocfs2_journal_access(handle, inode, bh,
+				   OCFS2_JOURNAL_ACCESS_WRITE);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	ocfs2_remove_empty_extent(el);
+
+	ret = ocfs2_journal_dirty(handle, bh);
+	if (ret)
+		mlog_errno(ret);
+
+out:
+	return ret;
+}
+
+static int __ocfs2_rotate_tree_left(struct inode *inode,
+				    handle_t *handle, int orig_credits,
+				    struct ocfs2_path *path,
+				    struct ocfs2_cached_dealloc_ctxt *dealloc,
+				    struct ocfs2_path **empty_extent_path)
+{
+	int ret, subtree_root, deleted;
+	u32 right_cpos;
+	struct ocfs2_path *left_path = NULL;
+	struct ocfs2_path *right_path = NULL;
+
+	BUG_ON(!ocfs2_is_empty_extent(&(path_leaf_el(path)->l_recs[0])));
+
+	*empty_extent_path = NULL;
+
+	ret = ocfs2_find_cpos_for_right_leaf(inode->i_sb, path,
+					     &right_cpos);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	left_path = ocfs2_new_path(path_root_bh(path),
+				   path_root_el(path));
+	if (!left_path) {
+		ret = -ENOMEM;
+		mlog_errno(ret);
+		goto out;
+	}
+
+	ocfs2_cp_path(left_path, path);
+
+	right_path = ocfs2_new_path(path_root_bh(path),
+				    path_root_el(path));
+	if (!right_path) {
+		ret = -ENOMEM;
+		mlog_errno(ret);
+		goto out;
+	}
+
+	while (right_cpos) {
+		ret = ocfs2_find_path(inode, right_path, right_cpos);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		subtree_root = ocfs2_find_subtree_root(inode, left_path,
+						       right_path);
+
+		mlog(0, "Subtree root at index %d (blk %llu, depth %d)\n",
+		     subtree_root,
+		     (unsigned long long)
+		     right_path->p_node[subtree_root].bh->b_blocknr,
+		     right_path->p_tree_depth);
+
+		ret = ocfs2_extend_rotate_transaction(handle, subtree_root,
+						      orig_credits, left_path);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		ret = ocfs2_rotate_subtree_left(inode, handle, left_path,
+						right_path, subtree_root,
+						dealloc, &deleted);
+		if (ret == -EAGAIN) {
+			/*
+			 * The rotation has to temporarily stop due to
+			 * the right subtree having an empty
+			 * extent. Pass it back to the caller for a
+			 * fixup.
+			 */
+			*empty_extent_path = right_path;
+			right_path = NULL;
+			goto out;
+		}
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		/*
+		 * The subtree rotate might have removed records on
+		 * the rightmost edge. If so, then rotation is
+		 * complete.
+		 */
+		if (deleted)
+			break;
+
+		ocfs2_mv_path(left_path, right_path);
+
+		ret = ocfs2_find_cpos_for_right_leaf(inode->i_sb, left_path,
+						     &right_cpos);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+	}
+
+out:
+	ocfs2_free_path(right_path);
+	ocfs2_free_path(left_path);
+
+	return ret;
+}
+
+static int ocfs2_remove_rightmost_path(struct inode *inode, handle_t *handle,
+				       struct ocfs2_path *path,
+				       struct ocfs2_cached_dealloc_ctxt *dealloc)
+{
+	int ret, subtree_index;
+	u32 cpos;
+	struct ocfs2_path *left_path = NULL;
+	struct ocfs2_dinode *di;
+	struct ocfs2_extent_block *eb;
+	struct ocfs2_extent_list *el;
+
+	/*
+	 * XXX: This code assumes that the root is an inode, which is
+	 * true for now but may change as tree code gets generic.
+	 */
+	di = (struct ocfs2_dinode *)path_root_bh(path)->b_data;
+	if (!OCFS2_IS_VALID_DINODE(di)) {
+		ret = -EIO;
+		ocfs2_error(inode->i_sb,
+			    "Inode %llu has invalid path root",
+			    (unsigned long long)OCFS2_I(inode)->ip_blkno);
+		goto out;
+	}
+
+	/*
+	 * There's two ways we handle this depending on
+	 * whether path is the only existing one.
+	 */
+	ret = ocfs2_extend_rotate_transaction(handle, 0,
+					      handle->h_buffer_credits,
+					      path);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	ret = ocfs2_journal_access_path(inode, handle, path);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, path, &cpos);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	if (cpos) {
+		/*
+		 * We have a path to the left of this one - it needs
+		 * an update too.
+		 */
+		left_path = ocfs2_new_path(path_root_bh(path),
+					   path_root_el(path));
+		if (!left_path) {
+			ret = -ENOMEM;
+			mlog_errno(ret);
+			goto out;
+		}
+
+		ret = ocfs2_find_path(inode, left_path, cpos);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		ret = ocfs2_journal_access_path(inode, handle, left_path);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		subtree_index = ocfs2_find_subtree_root(inode, left_path, path);
+
+		ocfs2_unlink_subtree(inode, handle, left_path, path,
+				     subtree_index, dealloc);
+		ocfs2_update_edge_lengths(inode, handle, left_path);
+
+		eb = (struct ocfs2_extent_block *)path_leaf_bh(left_path)->b_data;
+		di->i_last_eb_blk = eb->h_blkno;
+	} else {
+		/*
+		 * 'path' is also the leftmost path which
+		 * means it must be the only one. This gets
+		 * handled differently because we want to
+		 * revert the inode back to having extents
+		 * in-line.
+		 */
+		ocfs2_unlink_path(inode, handle, dealloc, path, 1);
+
+		el = &di->id2.i_list;
+		el->l_tree_depth = 0;
+		el->l_next_free_rec = 0;
+		memset(&el->l_recs[0], 0, sizeof(struct ocfs2_extent_rec));
+
+		di->i_last_eb_blk = 0;
+	}
+
+	ocfs2_journal_dirty(handle, path_root_bh(path));
+
+out:
+	ocfs2_free_path(left_path);
+	return ret;
+}
+
+/*
+ * Left rotation of btree records.
+ *
+ * In many ways, this is (unsurprisingly) the opposite of right
+ * rotation. We start at some non-rightmost path containing an empty
+ * extent in the leaf block. The code works its way to the rightmost
+ * path by rotating records to the left in every subtree.
+ *
+ * This is used by any code which reduces the number of extent records
+ * in a leaf. After removal, an empty record should be placed in the
+ * leftmost list position.
+ *
+ * This won't handle a length update of the rightmost path records if
+ * the rightmost tree leaf record is removed so the caller is
+ * responsible for detecting and correcting that.
+ */
+static int ocfs2_rotate_tree_left(struct inode *inode, handle_t *handle,
+				  struct ocfs2_path *path,
+				  struct ocfs2_cached_dealloc_ctxt *dealloc)
+{
+	int ret, orig_credits = handle->h_buffer_credits;
+	struct ocfs2_path *tmp_path = NULL, *restart_path = NULL;
+	struct ocfs2_extent_block *eb;
+	struct ocfs2_extent_list *el;
+
+	el = path_leaf_el(path);
+	if (!ocfs2_is_empty_extent(&el->l_recs[0]))
+		return 0;
+
+	if (path->p_tree_depth == 0) {
+rightmost_no_delete:
+		/*
+		 * In-inode extents. This is trivially handled, so do
+		 * it up front.
+		 */
+		ret = ocfs2_rotate_rightmost_leaf_left(inode, handle,
+						       path_leaf_bh(path),
+						       path_leaf_el(path));
+		if (ret)
+			mlog_errno(ret);
+		goto out;
+	}
+
+	/*
+	 * Handle rightmost branch now. There's several cases:
+	 *  1) simple rotation leaving records in there. That's trivial.
+	 *  2) rotation requiring a branch delete - there's no more
+	 *     records left. Two cases of this:
+	 *     a) There are branches to the left.
+	 *     b) This is also the leftmost (the only) branch.
+	 *
+	 *  1) is handled via ocfs2_rotate_rightmost_leaf_left()
+	 *  2a) we need the left branch so that we can update it with the unlink
+	 *  2b) we need to bring the inode back to inline extents.
+	 */
+
+	eb = (struct ocfs2_extent_block *)path_leaf_bh(path)->b_data;
+	el = &eb->h_list;
+	if (eb->h_next_leaf_blk == 0) {
+		/*
+		 * This gets a bit tricky if we're going to delete the
+		 * rightmost path. Get the other cases out of the way
+		 * 1st.
+		 */
+		if (le16_to_cpu(el->l_next_free_rec) > 1)
+			goto rightmost_no_delete;
+
+		if (le16_to_cpu(el->l_next_free_rec) == 0) {
+			ret = -EIO;
+			ocfs2_error(inode->i_sb,
+				    "Inode %llu has empty extent block at %llu",
+				    (unsigned long long)OCFS2_I(inode)->ip_blkno,
+				    (unsigned long long)le64_to_cpu(eb->h_blkno));
+			goto out;
+		}
+
+		/*
+		 * XXX: The caller can not trust "path" any more after
+		 * this as it will have been deleted. What do we do?
+		 *
+		 * In theory the rotate-for-merge code will never get
+		 * here because it'll always ask for a rotate in a
+		 * nonempty list.
+		 */
+
+		ret = ocfs2_remove_rightmost_path(inode, handle, path,
+						  dealloc);
+		if (ret)
+			mlog_errno(ret);
+		goto out;
+	}
+
+	/*
+	 * Now we can loop, remembering the path we get from -EAGAIN
+	 * and restarting from there.
+	 */
+try_rotate:
+	ret = __ocfs2_rotate_tree_left(inode, handle, orig_credits, path,
+				       dealloc, &restart_path);
+	if (ret && ret != -EAGAIN) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	while (ret == -EAGAIN) {
+		tmp_path = restart_path;
+		restart_path = NULL;
+
+		ret = __ocfs2_rotate_tree_left(inode, handle, orig_credits,
+					       tmp_path, dealloc,
+					       &restart_path);
+		if (ret && ret != -EAGAIN) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		ocfs2_free_path(tmp_path);
+		tmp_path = NULL;
+
+		if (ret == 0)
+			goto try_rotate;
+	}
+
+out:
+	ocfs2_free_path(tmp_path);
+	ocfs2_free_path(restart_path);
+	return ret;
+}
+
+static void ocfs2_cleanup_merge(struct ocfs2_extent_list *el,
+				int index)
+{
+	struct ocfs2_extent_rec *rec = &el->l_recs[index];
+	unsigned int size;
+
+	if (rec->e_leaf_clusters == 0) {
+		/*
+		 * We consumed all of the merged-from record. An empty
+		 * extent cannot exist anywhere but the 1st array
+		 * position, so move things over if the merged-from
+		 * record doesn't occupy that position.
+		 *
+		 * This creates a new empty extent so the caller
+		 * should be smart enough to have removed any existing
+		 * ones.
+		 */
+		if (index > 0) {
+			BUG_ON(ocfs2_is_empty_extent(&el->l_recs[0]));
+			size = index * sizeof(struct ocfs2_extent_rec);
+			memmove(&el->l_recs[1], &el->l_recs[0], size);
+		}
+
+		/*
+		 * Always memset - the caller doesn't check whether it
+		 * created an empty extent, so there could be junk in
+		 * the other fields.
+		 */
+		memset(&el->l_recs[0], 0, sizeof(struct ocfs2_extent_rec));
+	}
+}
+
+/*
+ * Remove split_rec clusters from the record at index and merge them
+ * onto the beginning of the record at index + 1.
+ */
+static int ocfs2_merge_rec_right(struct inode *inode, struct buffer_head *bh,
+				handle_t *handle,
+				struct ocfs2_extent_rec *split_rec,
+				struct ocfs2_extent_list *el, int index)
+{
+	int ret;
+	unsigned int split_clusters = le16_to_cpu(split_rec->e_leaf_clusters);
+	struct ocfs2_extent_rec *left_rec;
+	struct ocfs2_extent_rec *right_rec;
+
+	BUG_ON(index >= le16_to_cpu(el->l_next_free_rec));
+
+	left_rec = &el->l_recs[index];
+	right_rec = &el->l_recs[index + 1];
+
+	ret = ocfs2_journal_access(handle, inode, bh,
+				   OCFS2_JOURNAL_ACCESS_WRITE);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	le16_add_cpu(&left_rec->e_leaf_clusters, -split_clusters);
+
+	le32_add_cpu(&right_rec->e_cpos, -split_clusters);
+	le64_add_cpu(&right_rec->e_blkno,
+		     -ocfs2_clusters_to_blocks(inode->i_sb, split_clusters));
+	le16_add_cpu(&right_rec->e_leaf_clusters, split_clusters);
+
+	ocfs2_cleanup_merge(el, index);
+
+	ret = ocfs2_journal_dirty(handle, bh);
+	if (ret)
+		mlog_errno(ret);
+
+out:
+	return ret;
+}
+
+/*
+ * Remove split_rec clusters from the record at index and merge them
+ * onto the tail of the record at index - 1.
+ */
+static int ocfs2_merge_rec_left(struct inode *inode, struct buffer_head *bh,
+				handle_t *handle,
+				struct ocfs2_extent_rec *split_rec,
+				struct ocfs2_extent_list *el, int index)
+{
+	int ret, has_empty_extent = 0;
+	unsigned int split_clusters = le16_to_cpu(split_rec->e_leaf_clusters);
+	struct ocfs2_extent_rec *left_rec;
+	struct ocfs2_extent_rec *right_rec;
+
+	BUG_ON(index <= 0);
+
+	left_rec = &el->l_recs[index - 1];
+	right_rec = &el->l_recs[index];
+	if (ocfs2_is_empty_extent(&el->l_recs[0]))
+		has_empty_extent = 1;
+
+	ret = ocfs2_journal_access(handle, inode, bh,
+				   OCFS2_JOURNAL_ACCESS_WRITE);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	if (has_empty_extent && index == 1) {
+		/*
+		 * The easy case - we can just plop the record right in.
+		 */
+		*left_rec = *split_rec;
+
+		has_empty_extent = 0;
+	} else {
+		le16_add_cpu(&left_rec->e_leaf_clusters, split_clusters);
+	}
+
+	le32_add_cpu(&right_rec->e_cpos, split_clusters);
+	le64_add_cpu(&right_rec->e_blkno,
+		     ocfs2_clusters_to_blocks(inode->i_sb, split_clusters));
+	le16_add_cpu(&right_rec->e_leaf_clusters, -split_clusters);
+
+	ocfs2_cleanup_merge(el, index);
+
+	ret = ocfs2_journal_dirty(handle, bh);
+	if (ret)
+		mlog_errno(ret);
+
+out:
+	return ret;
+}
+
+static int ocfs2_try_to_merge_extent(struct inode *inode,
+				     handle_t *handle,
+				     struct ocfs2_path *left_path,
+				     int split_index,
+				     struct ocfs2_extent_rec *split_rec,
+				     struct ocfs2_cached_dealloc_ctxt *dealloc,
+				     struct ocfs2_merge_ctxt *ctxt)
+
+{
+	int ret = 0, delete_tail_recs = 0;
+	struct ocfs2_extent_list *el = path_leaf_el(left_path);
+	struct ocfs2_extent_rec *rec = &el->l_recs[split_index];
+
+	BUG_ON(ctxt->c_contig_type == CONTIG_NONE);
+
+	if (ctxt->c_split_covers_rec) {
+		delete_tail_recs++;
+
+		if (ctxt->c_contig_type == CONTIG_LEFTRIGHT ||
+		    ctxt->c_has_empty_extent)
+			delete_tail_recs++;
+
+		if (ctxt->c_has_empty_extent) {
+			/*
+			 * The merge code will need to create an empty
+			 * extent to take the place of the newly
+			 * emptied slot. Remove any pre-existing empty
+			 * extents - having more than one in a leaf is
+			 * illegal.
+			 */
+			ret = ocfs2_rotate_tree_left(inode, handle, left_path,
+						     dealloc);
+			if (ret) {
+				mlog_errno(ret);
+				goto out;
+			}
+			split_index--;
+			rec = &el->l_recs[split_index];
+		}
+	}
+
+	if (ctxt->c_contig_type == CONTIG_LEFTRIGHT) {
+		/*
+		 * Left-right contig implies this.
+		 */
+		BUG_ON(!ctxt->c_split_covers_rec);
+		BUG_ON(split_index == 0);
+
+		/*
+		 * Since the leftright insert always covers the entire
+		 * extent, this call will delete the insert record
+		 * entirely, resulting in an empty extent record added to
+		 * the extent block.
+		 *
+		 * Since the adding of an empty extent shifts
+		 * everything back to the right, there's no need to
+		 * update split_index here.
+		 */
+		ret = ocfs2_merge_rec_left(inode, path_leaf_bh(left_path),
+					   handle, split_rec, el, split_index);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		/*
+		 * We can only get this from logic error above.
+		 */
+		BUG_ON(!ocfs2_is_empty_extent(&el->l_recs[0]));
+
+		/*
+		 * The left merge left us with an empty extent, remove
+		 * it.
+		 */
+		ret = ocfs2_rotate_tree_left(inode, handle, left_path, dealloc);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+		split_index--;
+		rec = &el->l_recs[split_index];
+
+		/*
+		 * Note that we don't pass split_rec here on purpose -
+		 * we've merged it into the left side.
+		 */
+		ret = ocfs2_merge_rec_right(inode, path_leaf_bh(left_path),
+					    handle, rec, el, split_index);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		BUG_ON(!ocfs2_is_empty_extent(&el->l_recs[0]));
+
+		ret = ocfs2_rotate_tree_left(inode, handle, left_path,
+					     dealloc);
+		/*
+		 * Error from this last rotate is not critical, so
+		 * print but don't bubble it up.
+		 */
+		if (ret)
+			mlog_errno(ret);
+		ret = 0;
+	} else {
+		/*
+		 * Merge a record to the left or right.
+		 *
+		 * 'contig_type' is relative to the existing record,
+		 * so for example, if we're "right contig", it's to
+		 * the record on the left (hence the left merge).
+		 */
+		if (ctxt->c_contig_type == CONTIG_RIGHT) {
+			ret = ocfs2_merge_rec_left(inode,
+						   path_leaf_bh(left_path),
+						   handle, split_rec, el,
+						   split_index);
+			if (ret) {
+				mlog_errno(ret);
+				goto out;
+			}
+		} else {
+			ret = ocfs2_merge_rec_right(inode,
+						    path_leaf_bh(left_path),
+						    handle, split_rec, el,
+						    split_index);
+			if (ret) {
+				mlog_errno(ret);
+				goto out;
+			}
+		}
+
+		if (ctxt->c_split_covers_rec) {
+			/*
+			 * The merge may have left an empty extent in
+			 * our leaf. Try to rotate it away.
+			 */
+			ret = ocfs2_rotate_tree_left(inode, handle, left_path,
+						     dealloc);
+			if (ret)
+				mlog_errno(ret);
+			ret = 0;
+		}
+	}
+
+out:
+	return ret;
+}
+
+static void ocfs2_subtract_from_rec(struct super_block *sb,
+				    enum ocfs2_split_type split,
+				    struct ocfs2_extent_rec *rec,
+				    struct ocfs2_extent_rec *split_rec)
+{
+	u64 len_blocks;
+
+	len_blocks = ocfs2_clusters_to_blocks(sb,
+				le16_to_cpu(split_rec->e_leaf_clusters));
+
+	if (split == SPLIT_LEFT) {
+		/*
+		 * Region is on the left edge of the existing
+		 * record.
+		 */
+		le32_add_cpu(&rec->e_cpos,
+			     le16_to_cpu(split_rec->e_leaf_clusters));
+		le64_add_cpu(&rec->e_blkno, len_blocks);
+		le16_add_cpu(&rec->e_leaf_clusters,
+			     -le16_to_cpu(split_rec->e_leaf_clusters));
+	} else {
+		/*
+		 * Region is on the right edge of the existing
+		 * record.
+		 */
+		le16_add_cpu(&rec->e_leaf_clusters,
+			     -le16_to_cpu(split_rec->e_leaf_clusters));
+	}
+}
+
 /*
  * Do the final bits of extent record insertion at the target leaf
  * list. If this leaf is part of an allocation tree, it is assumed
@@ -1738,6 +2994,15 @@ static void ocfs2_insert_at_leaf(struct ocfs2_extent_rec *insert_rec,
 
 	BUG_ON(le16_to_cpu(el->l_tree_depth) != 0);
 
+	if (insert->ins_split != SPLIT_NONE) {
+		i = ocfs2_search_extent_list(el, le32_to_cpu(insert_rec->e_cpos));
+		BUG_ON(i == -1);
+		rec = &el->l_recs[i];
+		ocfs2_subtract_from_rec(inode->i_sb, insert->ins_split, rec,
+					insert_rec);
+		goto rotate;
+	}
+
 	/*
 	 * Contiguous insert - either left or right.
 	 */
@@ -1792,6 +3057,7 @@ static void ocfs2_insert_at_leaf(struct ocfs2_extent_rec *insert_rec,
 		return;
 	}
 
+rotate:
 	/*
 	 * Ok, we have to rotate.
 	 *
@@ -1815,13 +3081,53 @@ static inline void ocfs2_update_dinode_clusters(struct inode *inode,
 	spin_unlock(&OCFS2_I(inode)->ip_lock);
 }
 
+static void ocfs2_adjust_rightmost_records(struct inode *inode,
+					   handle_t *handle,
+					   struct ocfs2_path *path,
+					   struct ocfs2_extent_rec *insert_rec)
+{
+	int ret, i, next_free;
+	struct buffer_head *bh;
+	struct ocfs2_extent_list *el;
+	struct ocfs2_extent_rec *rec;
+
+	/*
+	 * Update everything except the leaf block.
+	 */
+	for (i = 0; i < path->p_tree_depth; i++) {
+		bh = path->p_node[i].bh;
+		el = path->p_node[i].el;
+
+		next_free = le16_to_cpu(el->l_next_free_rec);
+		if (next_free == 0) {
+			ocfs2_error(inode->i_sb,
+				    "Dinode %llu has a bad extent list",
+				    (unsigned long long)OCFS2_I(inode)->ip_blkno);
+			ret = -EIO;
+			return;
+		}
+
+		rec = &el->l_recs[next_free - 1];
+
+		rec->e_int_clusters = insert_rec->e_cpos;
+		le32_add_cpu(&rec->e_int_clusters,
+			     le16_to_cpu(insert_rec->e_leaf_clusters));
+		le32_add_cpu(&rec->e_int_clusters,
+			     -le32_to_cpu(rec->e_cpos));
+
+		ret = ocfs2_journal_dirty(handle, bh);
+		if (ret)
+			mlog_errno(ret);
+
+	}
+}
+
 static int ocfs2_append_rec_to_path(struct inode *inode, handle_t *handle,
 				    struct ocfs2_extent_rec *insert_rec,
 				    struct ocfs2_path *right_path,
 				    struct ocfs2_path **ret_left_path)
 {
-	int ret, i, next_free;
-	struct buffer_head *bh;
+	int ret, next_free;
 	struct ocfs2_extent_list *el;
 	struct ocfs2_path *left_path = NULL;
 
@@ -1887,40 +3193,7 @@ static int ocfs2_append_rec_to_path(struct inode *inode, handle_t *handle,
 		goto out;
 	}
 
-	el = path_root_el(right_path);
-	bh = path_root_bh(right_path);
-	i = 0;
-	while (1) {
-		struct ocfs2_extent_rec *rec;
-
-		next_free = le16_to_cpu(el->l_next_free_rec);
-		if (next_free == 0) {
-			ocfs2_error(inode->i_sb,
-				    "Dinode %llu has a bad extent list",
-				    (unsigned long long)OCFS2_I(inode)->ip_blkno);
-			ret = -EIO;
-			goto out;
-		}
-
-		rec = &el->l_recs[next_free - 1];
-
-		rec->e_int_clusters = insert_rec->e_cpos;
-		le32_add_cpu(&rec->e_int_clusters,
-			     le16_to_cpu(insert_rec->e_leaf_clusters));
-		le32_add_cpu(&rec->e_int_clusters,
-			     -le32_to_cpu(rec->e_cpos));
-
-		ret = ocfs2_journal_dirty(handle, bh);
-		if (ret)
-			mlog_errno(ret);
-
-		/* Don't touch the leaf node */
-		if (++i >= right_path->p_tree_depth)
-			break;
-
-		bh = right_path->p_node[i].bh;
-		el = right_path->p_node[i].el;
-	}
+	ocfs2_adjust_rightmost_records(inode, handle, right_path, insert_rec);
 
 	*ret_left_path = left_path;
 	ret = 0;
@@ -1931,6 +3204,83 @@ out:
 	return ret;
 }
 
+static void ocfs2_split_record(struct inode *inode,
+			       struct ocfs2_path *left_path,
+			       struct ocfs2_path *right_path,
+			       struct ocfs2_extent_rec *split_rec,
+			       enum ocfs2_split_type split)
+{
+	int index;
+	u32 cpos = le32_to_cpu(split_rec->e_cpos);
+	struct ocfs2_extent_list *left_el = NULL, *right_el, *insert_el, *el;
+	struct ocfs2_extent_rec *rec, *tmprec;
+
+	right_el = path_leaf_el(right_path);;
+	if (left_path)
+		left_el = path_leaf_el(left_path);
+
+	el = right_el;
+	insert_el = right_el;
+	index = ocfs2_search_extent_list(el, cpos);
+	if (index != -1) {
+		if (index == 0 && left_path) {
+			BUG_ON(ocfs2_is_empty_extent(&el->l_recs[0]));
+
+			/*
+			 * This typically means that the record
+			 * started in the left path but moved to the
+			 * right as a result of rotation. We either
+			 * move the existing record to the left, or we
+			 * do the later insert there.
+			 *
+			 * In this case, the left path should always
+			 * exist as the rotate code will have passed
+			 * it back for a post-insert update.
+			 */
+
+			if (split == SPLIT_LEFT) {
+				/*
+				 * It's a left split. Since we know
+				 * that the rotate code gave us an
+				 * empty extent in the left path, we
+				 * can just do the insert there.
+				 */
+				insert_el = left_el;
+			} else {
+				/*
+				 * Right split - we have to move the
+				 * existing record over to the left
+				 * leaf. The insert will be into the
+				 * newly created empty extent in the
+				 * right leaf.
+				 */
+				tmprec = &right_el->l_recs[index];
+				ocfs2_rotate_leaf(left_el, tmprec);
+				el = left_el;
+
+				memset(tmprec, 0, sizeof(*tmprec));
+				index = ocfs2_search_extent_list(left_el, cpos);
+				BUG_ON(index == -1);
+			}
+		}
+	} else {
+		BUG_ON(!left_path);
+		BUG_ON(!ocfs2_is_empty_extent(&left_el->l_recs[0]));
+		/*
+		 * Left path is easy - we can just allow the insert to
+		 * happen.
+		 */
+		el = left_el;
+		insert_el = left_el;
+		index = ocfs2_search_extent_list(el, cpos);
+		BUG_ON(index == -1);
+	}
+
+	rec = &el->l_recs[index];
+	ocfs2_subtract_from_rec(inode->i_sb, split, rec, split_rec);
+	ocfs2_rotate_leaf(insert_el, split_rec);
+}
+
 /*
  * This function only does inserts on an allocation b-tree. For dinode
  * lists, ocfs2_insert_at_leaf() is called directly.
@@ -1948,7 +3298,6 @@ static int ocfs2_insert_path(struct inode *inode,
 {
 	int ret, subtree_index;
 	struct buffer_head *leaf_bh = path_leaf_bh(right_path);
-	struct ocfs2_extent_list *el;
 
 	/*
 	 * Pass both paths to the journal. The majority of inserts
@@ -1984,9 +3333,18 @@ static int ocfs2_insert_path(struct inode *inode,
 		}
 	}
 
-	el = path_leaf_el(right_path);
+	if (insert->ins_split != SPLIT_NONE) {
+		/*
+		 * We could call ocfs2_insert_at_leaf() for some types
+		 * of splits, but it's easier to just let one seperate
+		 * function sort it all out.
+		 */
+		ocfs2_split_record(inode, left_path, right_path,
+				   insert_rec, insert->ins_split);
+	} else
+		ocfs2_insert_at_leaf(insert_rec, path_leaf_el(right_path),
+				     insert, inode);
 
-	ocfs2_insert_at_leaf(insert_rec, el, insert, inode);
 	ret = ocfs2_journal_dirty(handle, leaf_bh);
 	if (ret)
 		mlog_errno(ret);
@@ -2075,7 +3433,7 @@ static int ocfs2_do_insert_extent(struct inode *inode,
 	 * can wind up skipping both of these two special cases...
 	 */
 	if (rotate) {
-		ret = ocfs2_rotate_tree_right(inode, handle,
+		ret = ocfs2_rotate_tree_right(inode, handle, type->ins_split,
 					      le32_to_cpu(insert_rec->e_cpos),
 					      right_path, &left_path);
 		if (ret) {
@@ -2100,8 +3458,9 @@ static int ocfs2_do_insert_extent(struct inode *inode,
 	}
 
 out_update_clusters:
-	ocfs2_update_dinode_clusters(inode, di,
-				     le16_to_cpu(insert_rec->e_leaf_clusters));
+	if (type->ins_split == SPLIT_NONE)
+		ocfs2_update_dinode_clusters(inode, di,
+					     le16_to_cpu(insert_rec->e_leaf_clusters));
 
 	ret = ocfs2_journal_dirty(handle, di_bh);
 	if (ret)
@@ -2114,6 +3473,44 @@ out:
 	return ret;
 }
 
+static enum ocfs2_contig_type
+ocfs2_figure_merge_contig_type(struct inode *inode,
+			       struct ocfs2_extent_list *el, int index,
+			       struct ocfs2_extent_rec *split_rec)
+{
+	struct ocfs2_extent_rec *rec;
+	enum ocfs2_contig_type ret = CONTIG_NONE;
+
+	/*
+	 * We're careful to check for an empty extent record here -
+	 * the merge code will know what to do if it sees one.
+	 */
+
+	if (index > 0) {
+		rec = &el->l_recs[index - 1];
+		if (index == 1 && ocfs2_is_empty_extent(rec)) {
+			if (split_rec->e_cpos == el->l_recs[index].e_cpos)
+				ret = CONTIG_RIGHT;
+		} else {
+			ret = ocfs2_extent_contig(inode, rec, split_rec);
+		}
+	}
+
+	if (index < (le16_to_cpu(el->l_next_free_rec) - 1)) {
+		enum ocfs2_contig_type contig_type;
+
+		rec = &el->l_recs[index + 1];
+		contig_type = ocfs2_extent_contig(inode, rec, split_rec);
+
+		if (contig_type == CONTIG_LEFT && ret == CONTIG_RIGHT)
+			ret = CONTIG_LEFTRIGHT;
+		else if (ret == CONTIG_NONE)
+			ret = contig_type;
+	}
+
+	return ret;
+}
+
 static void ocfs2_figure_contig_type(struct inode *inode,
 				     struct ocfs2_insert_type *insert,
 				     struct ocfs2_extent_list *el,
@@ -2205,6 +3602,8 @@ static int ocfs2_figure_insert_type(struct inode *inode,
 	struct ocfs2_path *path = NULL;
 	struct buffer_head *bh = NULL;
 
+	insert->ins_split = SPLIT_NONE;
+
 	el = &di->id2.i_list;
 	insert->ins_tree_depth = le16_to_cpu(el->l_tree_depth);
 
@@ -2327,9 +3726,10 @@ int ocfs2_insert_extent(struct ocfs2_super *osb,
 			u32 cpos,
 			u64 start_blk,
 			u32 new_clusters,
+			u8 flags,
 			struct ocfs2_alloc_context *meta_ac)
 {
-	int status, shift;
+	int status;
 	struct buffer_head *last_eb_bh = NULL;
 	struct buffer_head *bh = NULL;
 	struct ocfs2_insert_type insert = {0, };
@@ -2350,6 +3750,7 @@ int ocfs2_insert_extent(struct ocfs2_super *osb,
 	rec.e_cpos = cpu_to_le32(cpos);
 	rec.e_blkno = cpu_to_le64(start_blk);
 	rec.e_leaf_clusters = cpu_to_le16(new_clusters);
+	rec.e_flags = flags;
 
 	status = ocfs2_figure_insert_type(inode, fe_bh, &last_eb_bh, &rec,
 					  &insert);
@@ -2364,55 +3765,16 @@ int ocfs2_insert_extent(struct ocfs2_super *osb,
 	     insert.ins_appending, insert.ins_contig, insert.ins_contig_index,
 	     insert.ins_free_records, insert.ins_tree_depth);
 
-	/*
-	 * Avoid growing the tree unless we're out of records and the
-	 * insert type requres one.
-	 */
-	if (insert.ins_contig != CONTIG_NONE || insert.ins_free_records)
-		goto out_add;
-
-	shift = ocfs2_find_branch_target(osb, inode, fe_bh, &bh);
-	if (shift < 0) {
-		status = shift;
-		mlog_errno(status);
-		goto bail;
-	}
-
-	/* We traveled all the way to the bottom of the allocation tree
-	 * and didn't find room for any more extents - we need to add
-	 * another tree level */
-	if (shift) {
-		BUG_ON(bh);
-		mlog(0, "need to shift tree depth "
-		     "(current = %d)\n", insert.ins_tree_depth);
-
-		/* ocfs2_shift_tree_depth will return us a buffer with
-		 * the new extent block (so we can pass that to
-		 * ocfs2_add_branch). */
-		status = ocfs2_shift_tree_depth(osb, handle, inode, fe_bh,
-						meta_ac, &bh);
-		if (status < 0) {
+	if (insert.ins_contig == CONTIG_NONE && insert.ins_free_records == 0) {
+		status = ocfs2_grow_tree(inode, handle, fe_bh,
+					 &insert.ins_tree_depth, &last_eb_bh,
+					 meta_ac);
+		if (status) {
 			mlog_errno(status);
 			goto bail;
 		}
-		insert.ins_tree_depth++;
-		/* Special case: we have room now if we shifted from
-		 * tree_depth 0 */
-		if (insert.ins_tree_depth == 1)
-			goto out_add;
-	}
-
-	/* call ocfs2_add_branch to add the final part of the tree with
-	 * the new data. */
-	mlog(0, "add branch. bh = %p\n", bh);
-	status = ocfs2_add_branch(osb, handle, inode, fe_bh, bh, last_eb_bh,
-				  meta_ac);
-	if (status < 0) {
-		mlog_errno(status);
-		goto bail;
 	}
 
-out_add:
 	/* Finally, we can add clusters. This might rotate the tree for us. */
 	status = ocfs2_do_insert_extent(inode, handle, fe_bh, &rec, &insert);
 	if (status < 0)
@@ -2431,7 +3793,720 @@ bail:
 	return status;
 }
 
-static inline int ocfs2_truncate_log_needs_flush(struct ocfs2_super *osb)
+static void ocfs2_make_right_split_rec(struct super_block *sb,
+				       struct ocfs2_extent_rec *split_rec,
+				       u32 cpos,
+				       struct ocfs2_extent_rec *rec)
+{
+	u32 rec_cpos = le32_to_cpu(rec->e_cpos);
+	u32 rec_range = rec_cpos + le16_to_cpu(rec->e_leaf_clusters);
+
+	memset(split_rec, 0, sizeof(struct ocfs2_extent_rec));
+
+	split_rec->e_cpos = cpu_to_le32(cpos);
+	split_rec->e_leaf_clusters = cpu_to_le16(rec_range - cpos);
+
+	split_rec->e_blkno = rec->e_blkno;
+	le64_add_cpu(&split_rec->e_blkno,
+		     ocfs2_clusters_to_blocks(sb, cpos - rec_cpos));
+
+	split_rec->e_flags = rec->e_flags;
+}
+
+static int ocfs2_split_and_insert(struct inode *inode,
+				  handle_t *handle,
+				  struct ocfs2_path *path,
+				  struct buffer_head *di_bh,
+				  struct buffer_head **last_eb_bh,
+				  int split_index,
+				  struct ocfs2_extent_rec *orig_split_rec,
+				  struct ocfs2_alloc_context *meta_ac)
+{
+	int ret = 0, depth;
+	unsigned int insert_range, rec_range, do_leftright = 0;
+	struct ocfs2_extent_rec tmprec;
+	struct ocfs2_extent_list *rightmost_el;
+	struct ocfs2_extent_rec rec;
+	struct ocfs2_extent_rec split_rec = *orig_split_rec;
+	struct ocfs2_insert_type insert;
+	struct ocfs2_extent_block *eb;
+	struct ocfs2_dinode *di;
+
+leftright:
+	/*
+	 * Store a copy of the record on the stack - it might move
+	 * around as the tree is manipulated below.
+	 */
+	rec = path_leaf_el(path)->l_recs[split_index];
+
+	di = (struct ocfs2_dinode *)di_bh->b_data;
+	rightmost_el = &di->id2.i_list;
+
+	depth = le16_to_cpu(rightmost_el->l_tree_depth);
+	if (depth) {
+		BUG_ON(!(*last_eb_bh));
+		eb = (struct ocfs2_extent_block *) (*last_eb_bh)->b_data;
+		rightmost_el = &eb->h_list;
+	}
+
+	if (le16_to_cpu(rightmost_el->l_next_free_rec) ==
+	    le16_to_cpu(rightmost_el->l_count)) {
+		int old_depth = depth;
+
+		ret = ocfs2_grow_tree(inode, handle, di_bh, &depth, last_eb_bh,
+				      meta_ac);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		if (old_depth != depth) {
+			eb = (struct ocfs2_extent_block *)(*last_eb_bh)->b_data;
+			rightmost_el = &eb->h_list;
+		}
+	}
+
+	memset(&insert, 0, sizeof(struct ocfs2_insert_type));
+	insert.ins_appending = APPEND_NONE;
+	insert.ins_contig = CONTIG_NONE;
+	insert.ins_free_records = le16_to_cpu(rightmost_el->l_count)
+		- le16_to_cpu(rightmost_el->l_next_free_rec);
+	insert.ins_tree_depth = depth;
+
+	insert_range = le32_to_cpu(split_rec.e_cpos) +
+		le16_to_cpu(split_rec.e_leaf_clusters);
+	rec_range = le32_to_cpu(rec.e_cpos) +
+		le16_to_cpu(rec.e_leaf_clusters);
+
+	if (split_rec.e_cpos == rec.e_cpos) {
+		insert.ins_split = SPLIT_LEFT;
+	} else if (insert_range == rec_range) {
+		insert.ins_split = SPLIT_RIGHT;
+	} else {
+		/*
+		 * Left/right split. We fake this as a right split
+		 * first and then make a second pass as a left split.
+		 */
+		insert.ins_split = SPLIT_RIGHT;
+
+		ocfs2_make_right_split_rec(inode->i_sb, &tmprec, insert_range,
+					   &rec);
+
+		split_rec = tmprec;
+
+		BUG_ON(do_leftright);
+		do_leftright = 1;
+	}
+
+	ret = ocfs2_do_insert_extent(inode, handle, di_bh, &split_rec,
+				     &insert);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	if (do_leftright == 1) {
+		u32 cpos;
+		struct ocfs2_extent_list *el;
+
+		do_leftright++;
+		split_rec = *orig_split_rec;
+
+		ocfs2_reinit_path(path, 1);
+
+		cpos = le32_to_cpu(split_rec.e_cpos);
+		ret = ocfs2_find_path(inode, path, cpos);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		el = path_leaf_el(path);
+		split_index = ocfs2_search_extent_list(el, cpos);
+		goto leftright;
+	}
+out:
+
+	return ret;
+}
+
+/*
+ * Mark part or all of the extent record at split_index in the leaf
+ * pointed to by path as written. This removes the unwritten
+ * extent flag.
+ *
+ * Care is taken to handle contiguousness so as to not grow the tree.
+ *
+ * meta_ac is not strictly necessary - we only truly need it if growth
+ * of the tree is required. All other cases will degrade into a less
+ * optimal tree layout.
+ *
+ * last_eb_bh should be the rightmost leaf block for any inode with a
+ * btree. Since a split may grow the tree or a merge might shrink it, the caller cannot trust the contents of that buffer after this call.
+ *
+ * This code is optimized for readability - several passes might be
+ * made over certain portions of the tree. All of those blocks will
+ * have been brought into cache (and pinned via the journal), so the
+ * extra overhead is not expressed in terms of disk reads.
+ */
+static int __ocfs2_mark_extent_written(struct inode *inode,
+				       struct buffer_head *di_bh,
+				       handle_t *handle,
+				       struct ocfs2_path *path,
+				       int split_index,
+				       struct ocfs2_extent_rec *split_rec,
+				       struct ocfs2_alloc_context *meta_ac,
+				       struct ocfs2_cached_dealloc_ctxt *dealloc)
+{
+	int ret = 0;
+	struct ocfs2_extent_list *el = path_leaf_el(path);
+	struct buffer_head *eb_bh, *last_eb_bh = NULL;
+	struct ocfs2_extent_rec *rec = &el->l_recs[split_index];
+	struct ocfs2_merge_ctxt ctxt;
+	struct ocfs2_extent_list *rightmost_el;
+
+	if (!rec->e_flags & OCFS2_EXT_UNWRITTEN) {
+		ret = -EIO;
+		mlog_errno(ret);
+		goto out;
+	}
+
+	if (le32_to_cpu(rec->e_cpos) > le32_to_cpu(split_rec->e_cpos) ||
+	    ((le32_to_cpu(rec->e_cpos) + le16_to_cpu(rec->e_leaf_clusters)) <
+	     (le32_to_cpu(split_rec->e_cpos) + le16_to_cpu(split_rec->e_leaf_clusters)))) {
+		ret = -EIO;
+		mlog_errno(ret);
+		goto out;
+	}
+
+	eb_bh = path_leaf_bh(path);
+	ret = ocfs2_journal_access(handle, inode, eb_bh,
+				   OCFS2_JOURNAL_ACCESS_WRITE);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	ctxt.c_contig_type = ocfs2_figure_merge_contig_type(inode, el,
+							    split_index,
+							    split_rec);
+
+	/*
+	 * The core merge / split code wants to know how much room is
+	 * left in this inodes allocation tree, so we pass the
+	 * rightmost extent list.
+	 */
+	if (path->p_tree_depth) {
+		struct ocfs2_extent_block *eb;
+		struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+
+		ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
+				       le64_to_cpu(di->i_last_eb_blk),
+				       &last_eb_bh, OCFS2_BH_CACHED, inode);
+		if (ret) {
+			mlog_exit(ret);
+			goto out;
+		}
+
+		eb = (struct ocfs2_extent_block *) last_eb_bh->b_data;
+		if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) {
+			OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, eb);
+			ret = -EROFS;
+			goto out;
+		}
+
+		rightmost_el = &eb->h_list;
+	} else
+		rightmost_el = path_root_el(path);
+
+	ctxt.c_used_tail_recs = le16_to_cpu(rightmost_el->l_next_free_rec);
+	if (ctxt.c_used_tail_recs > 0 &&
+	    ocfs2_is_empty_extent(&rightmost_el->l_recs[0]))
+		ctxt.c_used_tail_recs--;
+
+	if (rec->e_cpos == split_rec->e_cpos &&
+	    rec->e_leaf_clusters == split_rec->e_leaf_clusters)
+		ctxt.c_split_covers_rec = 1;
+	else
+		ctxt.c_split_covers_rec = 0;
+
+	ctxt.c_has_empty_extent = ocfs2_is_empty_extent(&el->l_recs[0]);
+
+	mlog(0, "index: %d, contig: %u, used_tail_recs: %u, "
+	     "has_empty: %u, split_covers: %u\n", split_index,
+	     ctxt.c_contig_type, ctxt.c_used_tail_recs,
+	     ctxt.c_has_empty_extent, ctxt.c_split_covers_rec);
+
+	if (ctxt.c_contig_type == CONTIG_NONE) {
+		if (ctxt.c_split_covers_rec)
+			el->l_recs[split_index] = *split_rec;
+		else
+			ret = ocfs2_split_and_insert(inode, handle, path, di_bh,
+						     &last_eb_bh, split_index,
+						     split_rec, meta_ac);
+		if (ret)
+			mlog_errno(ret);
+	} else {
+		ret = ocfs2_try_to_merge_extent(inode, handle, path,
+						split_index, split_rec,
+						dealloc, &ctxt);
+		if (ret)
+			mlog_errno(ret);
+	}
+
+	ocfs2_journal_dirty(handle, eb_bh);
+
+out:
+	brelse(last_eb_bh);
+	return ret;
+}
+
+/*
+ * Mark the already-existing extent at cpos as written for len clusters.
+ *
+ * If the existing extent is larger than the request, initiate a
+ * split. An attempt will be made at merging with adjacent extents.
+ *
+ * The caller is responsible for passing down meta_ac if we'll need it.
+ */
+int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *di_bh,
+			      handle_t *handle, u32 cpos, u32 len, u32 phys,
+			      struct ocfs2_alloc_context *meta_ac,
+			      struct ocfs2_cached_dealloc_ctxt *dealloc)
+{
+	int ret, index;
+	u64 start_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys);
+	struct ocfs2_extent_rec split_rec;
+	struct ocfs2_path *left_path = NULL;
+	struct ocfs2_extent_list *el;
+
+	mlog(0, "Inode %lu cpos %u, len %u, phys %u (%llu)\n",
+	     inode->i_ino, cpos, len, phys, (unsigned long long)start_blkno);
+
+	if (!ocfs2_writes_unwritten_extents(OCFS2_SB(inode->i_sb))) {
+		ocfs2_error(inode->i_sb, "Inode %llu has unwritten extents "
+			    "that are being written to, but the feature bit "
+			    "is not set in the super block.",
+			    (unsigned long long)OCFS2_I(inode)->ip_blkno);
+		ret = -EROFS;
+		goto out;
+	}
+
+	/*
+	 * XXX: This should be fixed up so that we just re-insert the
+	 * next extent records.
+	 */
+	ocfs2_extent_map_trunc(inode, 0);
+
+	left_path = ocfs2_new_inode_path(di_bh);
+	if (!left_path) {
+		ret = -ENOMEM;
+		mlog_errno(ret);
+		goto out;
+	}
+
+	ret = ocfs2_find_path(inode, left_path, cpos);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+	el = path_leaf_el(left_path);
+
+	index = ocfs2_search_extent_list(el, cpos);
+	if (index == -1 || index >= le16_to_cpu(el->l_next_free_rec)) {
+		ocfs2_error(inode->i_sb,
+			    "Inode %llu has an extent at cpos %u which can no "
+			    "longer be found.\n",
+			    (unsigned long long)OCFS2_I(inode)->ip_blkno, cpos);
+		ret = -EROFS;
+		goto out;
+	}
+
+	memset(&split_rec, 0, sizeof(struct ocfs2_extent_rec));
+	split_rec.e_cpos = cpu_to_le32(cpos);
+	split_rec.e_leaf_clusters = cpu_to_le16(len);
+	split_rec.e_blkno = cpu_to_le64(start_blkno);
+	split_rec.e_flags = path_leaf_el(left_path)->l_recs[index].e_flags;
+	split_rec.e_flags &= ~OCFS2_EXT_UNWRITTEN;
+
+	ret = __ocfs2_mark_extent_written(inode, di_bh, handle, left_path,
+					  index, &split_rec, meta_ac, dealloc);
+	if (ret)
+		mlog_errno(ret);
+
+out:
+	ocfs2_free_path(left_path);
+	return ret;
+}
+
+static int ocfs2_split_tree(struct inode *inode, struct buffer_head *di_bh,
+			    handle_t *handle, struct ocfs2_path *path,
+			    int index, u32 new_range,
+			    struct ocfs2_alloc_context *meta_ac)
+{
+	int ret, depth, credits = handle->h_buffer_credits;
+	struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+	struct buffer_head *last_eb_bh = NULL;
+	struct ocfs2_extent_block *eb;
+	struct ocfs2_extent_list *rightmost_el, *el;
+	struct ocfs2_extent_rec split_rec;
+	struct ocfs2_extent_rec *rec;
+	struct ocfs2_insert_type insert;
+
+	/*
+	 * Setup the record to split before we grow the tree.
+	 */
+	el = path_leaf_el(path);
+	rec = &el->l_recs[index];
+	ocfs2_make_right_split_rec(inode->i_sb, &split_rec, new_range, rec);
+
+	depth = path->p_tree_depth;
+	if (depth > 0) {
+		ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
+				       le64_to_cpu(di->i_last_eb_blk),
+				       &last_eb_bh, OCFS2_BH_CACHED, inode);
+		if (ret < 0) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		eb = (struct ocfs2_extent_block *) last_eb_bh->b_data;
+		rightmost_el = &eb->h_list;
+	} else
+		rightmost_el = path_leaf_el(path);
+
+	credits += path->p_tree_depth + ocfs2_extend_meta_needed(di);
+	ret = ocfs2_extend_trans(handle, credits);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	if (le16_to_cpu(rightmost_el->l_next_free_rec) ==
+	    le16_to_cpu(rightmost_el->l_count)) {
+		int old_depth = depth;
+
+		ret = ocfs2_grow_tree(inode, handle, di_bh, &depth, &last_eb_bh,
+				      meta_ac);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		if (old_depth != depth) {
+			eb = (struct ocfs2_extent_block *)last_eb_bh->b_data;
+			rightmost_el = &eb->h_list;
+		}
+	}
+
+	memset(&insert, 0, sizeof(struct ocfs2_insert_type));
+	insert.ins_appending = APPEND_NONE;
+	insert.ins_contig = CONTIG_NONE;
+	insert.ins_split = SPLIT_RIGHT;
+	insert.ins_free_records = le16_to_cpu(rightmost_el->l_count)
+		- le16_to_cpu(rightmost_el->l_next_free_rec);
+	insert.ins_tree_depth = depth;
+
+	ret = ocfs2_do_insert_extent(inode, handle, di_bh, &split_rec, &insert);
+	if (ret)
+		mlog_errno(ret);
+
+out:
+	brelse(last_eb_bh);
+	return ret;
+}
+
+static int ocfs2_truncate_rec(struct inode *inode, handle_t *handle,
+			      struct ocfs2_path *path, int index,
+			      struct ocfs2_cached_dealloc_ctxt *dealloc,
+			      u32 cpos, u32 len)
+{
+	int ret;
+	u32 left_cpos, rec_range, trunc_range;
+	int wants_rotate = 0, is_rightmost_tree_rec = 0;
+	struct super_block *sb = inode->i_sb;
+	struct ocfs2_path *left_path = NULL;
+	struct ocfs2_extent_list *el = path_leaf_el(path);
+	struct ocfs2_extent_rec *rec;
+	struct ocfs2_extent_block *eb;
+
+	if (ocfs2_is_empty_extent(&el->l_recs[0]) && index > 0) {
+		ret = ocfs2_rotate_tree_left(inode, handle, path, dealloc);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		index--;
+	}
+
+	if (index == (le16_to_cpu(el->l_next_free_rec) - 1) &&
+	    path->p_tree_depth) {
+		/*
+		 * Check whether this is the rightmost tree record. If
+		 * we remove all of this record or part of its right
+		 * edge then an update of the record lengths above it
+		 * will be required.
+		 */
+		eb = (struct ocfs2_extent_block *)path_leaf_bh(path)->b_data;
+		if (eb->h_next_leaf_blk == 0)
+			is_rightmost_tree_rec = 1;
+	}
+
+	rec = &el->l_recs[index];
+	if (index == 0 && path->p_tree_depth &&
+	    le32_to_cpu(rec->e_cpos) == cpos) {
+		/*
+		 * Changing the leftmost offset (via partial or whole
+		 * record truncate) of an interior (or rightmost) path
+		 * means we have to update the subtree that is formed
+		 * by this leaf and the one to it's left.
+		 *
+		 * There are two cases we can skip:
+		 *   1) Path is the leftmost one in our inode tree.
+		 *   2) The leaf is rightmost and will be empty after
+		 *      we remove the extent record - the rotate code
+		 *      knows how to update the newly formed edge.
+		 */
+
+		ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, path,
+						    &left_cpos);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		if (left_cpos && le16_to_cpu(el->l_next_free_rec) > 1) {
+			left_path = ocfs2_new_path(path_root_bh(path),
+						   path_root_el(path));
+			if (!left_path) {
+				ret = -ENOMEM;
+				mlog_errno(ret);
+				goto out;
+			}
+
+			ret = ocfs2_find_path(inode, left_path, left_cpos);
+			if (ret) {
+				mlog_errno(ret);
+				goto out;
+			}
+		}
+	}
+
+	ret = ocfs2_extend_rotate_transaction(handle, 0,
+					      handle->h_buffer_credits,
+					      path);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	ret = ocfs2_journal_access_path(inode, handle, path);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	ret = ocfs2_journal_access_path(inode, handle, left_path);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	rec_range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec);
+	trunc_range = cpos + len;
+
+	if (le32_to_cpu(rec->e_cpos) == cpos && rec_range == trunc_range) {
+		int next_free;
+
+		memset(rec, 0, sizeof(*rec));
+		ocfs2_cleanup_merge(el, index);
+		wants_rotate = 1;
+
+		next_free = le16_to_cpu(el->l_next_free_rec);
+		if (is_rightmost_tree_rec && next_free > 1) {
+			/*
+			 * We skip the edge update if this path will
+			 * be deleted by the rotate code.
+			 */
+			rec = &el->l_recs[next_free - 1];
+			ocfs2_adjust_rightmost_records(inode, handle, path,
+						       rec);
+		}
+	} else if (le32_to_cpu(rec->e_cpos) == cpos) {
+		/* Remove leftmost portion of the record. */
+		le32_add_cpu(&rec->e_cpos, len);
+		le64_add_cpu(&rec->e_blkno, ocfs2_clusters_to_blocks(sb, len));
+		le16_add_cpu(&rec->e_leaf_clusters, -len);
+	} else if (rec_range == trunc_range) {
+		/* Remove rightmost portion of the record */
+		le16_add_cpu(&rec->e_leaf_clusters, -len);
+		if (is_rightmost_tree_rec)
+			ocfs2_adjust_rightmost_records(inode, handle, path, rec);
+	} else {
+		/* Caller should have trapped this. */
+		mlog(ML_ERROR, "Inode %llu: Invalid record truncate: (%u, %u) "
+		     "(%u, %u)\n", (unsigned long long)OCFS2_I(inode)->ip_blkno,
+		     le32_to_cpu(rec->e_cpos),
+		     le16_to_cpu(rec->e_leaf_clusters), cpos, len);
+		BUG();
+	}
+
+	if (left_path) {
+		int subtree_index;
+
+		subtree_index = ocfs2_find_subtree_root(inode, left_path, path);
+		ocfs2_complete_edge_insert(inode, handle, left_path, path,
+					   subtree_index);
+	}
+
+	ocfs2_journal_dirty(handle, path_leaf_bh(path));
+
+	ret = ocfs2_rotate_tree_left(inode, handle, path, dealloc);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+out:
+	ocfs2_free_path(left_path);
+	return ret;
+}
+
+int ocfs2_remove_extent(struct inode *inode, struct buffer_head *di_bh,
+			u32 cpos, u32 len, handle_t *handle,
+			struct ocfs2_alloc_context *meta_ac,
+			struct ocfs2_cached_dealloc_ctxt *dealloc)
+{
+	int ret, index;
+	u32 rec_range, trunc_range;
+	struct ocfs2_extent_rec *rec;
+	struct ocfs2_extent_list *el;
+	struct ocfs2_path *path;
+
+	ocfs2_extent_map_trunc(inode, 0);
+
+	path = ocfs2_new_inode_path(di_bh);
+	if (!path) {
+		ret = -ENOMEM;
+		mlog_errno(ret);
+		goto out;
+	}
+
+	ret = ocfs2_find_path(inode, path, cpos);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	el = path_leaf_el(path);
+	index = ocfs2_search_extent_list(el, cpos);
+	if (index == -1 || index >= le16_to_cpu(el->l_next_free_rec)) {
+		ocfs2_error(inode->i_sb,
+			    "Inode %llu has an extent at cpos %u which can no "
+			    "longer be found.\n",
+			    (unsigned long long)OCFS2_I(inode)->ip_blkno, cpos);
+		ret = -EROFS;
+		goto out;
+	}
+
+	/*
+	 * We have 3 cases of extent removal:
+	 *   1) Range covers the entire extent rec
+	 *   2) Range begins or ends on one edge of the extent rec
+	 *   3) Range is in the middle of the extent rec (no shared edges)
+	 *
+	 * For case 1 we remove the extent rec and left rotate to
+	 * fill the hole.
+	 *
+	 * For case 2 we just shrink the existing extent rec, with a
+	 * tree update if the shrinking edge is also the edge of an
+	 * extent block.
+	 *
+	 * For case 3 we do a right split to turn the extent rec into
+	 * something case 2 can handle.
+	 */
+	rec = &el->l_recs[index];
+	rec_range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec);
+	trunc_range = cpos + len;
+
+	BUG_ON(cpos < le32_to_cpu(rec->e_cpos) || trunc_range > rec_range);
+
+	mlog(0, "Inode %llu, remove (cpos %u, len %u). Existing index %d "
+	     "(cpos %u, len %u)\n",
+	     (unsigned long long)OCFS2_I(inode)->ip_blkno, cpos, len, index,
+	     le32_to_cpu(rec->e_cpos), ocfs2_rec_clusters(el, rec));
+
+	if (le32_to_cpu(rec->e_cpos) == cpos || rec_range == trunc_range) {
+		ret = ocfs2_truncate_rec(inode, handle, path, index, dealloc,
+					 cpos, len);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+	} else {
+		ret = ocfs2_split_tree(inode, di_bh, handle, path, index,
+				       trunc_range, meta_ac);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		/*
+		 * The split could have manipulated the tree enough to
+		 * move the record location, so we have to look for it again.
+		 */
+		ocfs2_reinit_path(path, 1);
+
+		ret = ocfs2_find_path(inode, path, cpos);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		el = path_leaf_el(path);
+		index = ocfs2_search_extent_list(el, cpos);
+		if (index == -1 || index >= le16_to_cpu(el->l_next_free_rec)) {
+			ocfs2_error(inode->i_sb,
+				    "Inode %llu: split at cpos %u lost record.",
+				    (unsigned long long)OCFS2_I(inode)->ip_blkno,
+				    cpos);
+			ret = -EROFS;
+			goto out;
+		}
+
+		/*
+		 * Double check our values here. If anything is fishy,
+		 * it's easier to catch it at the top level.
+		 */
+		rec = &el->l_recs[index];
+		rec_range = le32_to_cpu(rec->e_cpos) +
+			ocfs2_rec_clusters(el, rec);
+		if (rec_range != trunc_range) {
+			ocfs2_error(inode->i_sb,
+				    "Inode %llu: error after split at cpos %u"
+				    "trunc len %u, existing record is (%u,%u)",
+				    (unsigned long long)OCFS2_I(inode)->ip_blkno,
+				    cpos, len, le32_to_cpu(rec->e_cpos),
+				    ocfs2_rec_clusters(el, rec));
+			ret = -EROFS;
+			goto out;
+		}
+
+		ret = ocfs2_truncate_rec(inode, handle, path, index, dealloc,
+					 cpos, len);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+	}
+
+out:
+	ocfs2_free_path(path);
+	return ret;
+}
+
+int ocfs2_truncate_log_needs_flush(struct ocfs2_super *osb)
 {
 	struct buffer_head *tl_bh = osb->osb_tl_bh;
 	struct ocfs2_dinode *di;
@@ -2464,10 +4539,10 @@ static int ocfs2_truncate_log_can_coalesce(struct ocfs2_truncate_log *tl,
 	return current_tail == new_start;
 }
 
-static int ocfs2_truncate_log_append(struct ocfs2_super *osb,
-				     handle_t *handle,
-				     u64 start_blk,
-				     unsigned int num_clusters)
+int ocfs2_truncate_log_append(struct ocfs2_super *osb,
+			      handle_t *handle,
+			      u64 start_blk,
+			      unsigned int num_clusters)
 {
 	int status, index;
 	unsigned int start_cluster, tl_count;
@@ -2623,7 +4698,7 @@ bail:
 }
 
 /* Expects you to already be holding tl_inode->i_mutex */
-static int __ocfs2_flush_truncate_log(struct ocfs2_super *osb)
+int __ocfs2_flush_truncate_log(struct ocfs2_super *osb)
 {
 	int status;
 	unsigned int num_to_flush;
@@ -2957,6 +5032,219 @@ int ocfs2_truncate_log_init(struct ocfs2_super *osb)
 	return status;
 }
 
+/*
+ * Delayed de-allocation of suballocator blocks.
+ *
+ * Some sets of block de-allocations might involve multiple suballocator inodes.
+ *
+ * The locking for this can get extremely complicated, especially when
+ * the suballocator inodes to delete from aren't known until deep
+ * within an unrelated codepath.
+ *
+ * ocfs2_extent_block structures are a good example of this - an inode
+ * btree could have been grown by any number of nodes each allocating
+ * out of their own suballoc inode.
+ *
+ * These structures allow the delay of block de-allocation until a
+ * later time, when locking of multiple cluster inodes won't cause
+ * deadlock.
+ */
+
+/*
+ * Describes a single block free from a suballocator
+ */
+struct ocfs2_cached_block_free {
+	struct ocfs2_cached_block_free		*free_next;
+	u64					free_blk;
+	unsigned int				free_bit;
+};
+
+struct ocfs2_per_slot_free_list {
+	struct ocfs2_per_slot_free_list		*f_next_suballocator;
+	int					f_inode_type;
+	int					f_slot;
+	struct ocfs2_cached_block_free		*f_first;
+};
+
+static int ocfs2_free_cached_items(struct ocfs2_super *osb,
+				   int sysfile_type,
+				   int slot,
+				   struct ocfs2_cached_block_free *head)
+{
+	int ret;
+	u64 bg_blkno;
+	handle_t *handle;
+	struct inode *inode;
+	struct buffer_head *di_bh = NULL;
+	struct ocfs2_cached_block_free *tmp;
+
+	inode = ocfs2_get_system_file_inode(osb, sysfile_type, slot);
+	if (!inode) {
+		ret = -EINVAL;
+		mlog_errno(ret);
+		goto out;
+	}
+
+	mutex_lock(&inode->i_mutex);
+
+	ret = ocfs2_meta_lock(inode, &di_bh, 1);
+	if (ret) {
+		mlog_errno(ret);
+		goto out_mutex;
+	}
+
+	handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE);
+	if (IS_ERR(handle)) {
+		ret = PTR_ERR(handle);
+		mlog_errno(ret);
+		goto out_unlock;
+	}
+
+	while (head) {
+		bg_blkno = ocfs2_which_suballoc_group(head->free_blk,
+						      head->free_bit);
+		mlog(0, "Free bit: (bit %u, blkno %llu)\n",
+		     head->free_bit, (unsigned long long)head->free_blk);
+
+		ret = ocfs2_free_suballoc_bits(handle, inode, di_bh,
+					       head->free_bit, bg_blkno, 1);
+		if (ret) {
+			mlog_errno(ret);
+			goto out_journal;
+		}
+
+		ret = ocfs2_extend_trans(handle, OCFS2_SUBALLOC_FREE);
+		if (ret) {
+			mlog_errno(ret);
+			goto out_journal;
+		}
+
+		tmp = head;
+		head = head->free_next;
+		kfree(tmp);
+	}
+
+out_journal:
+	ocfs2_commit_trans(osb, handle);
+
+out_unlock:
+	ocfs2_meta_unlock(inode, 1);
+	brelse(di_bh);
+out_mutex:
+	mutex_unlock(&inode->i_mutex);
+	iput(inode);
+out:
+	while(head) {
+		/* Premature exit may have left some dangling items. */
+		tmp = head;
+		head = head->free_next;
+		kfree(tmp);
+	}
+
+	return ret;
+}
+
+int ocfs2_run_deallocs(struct ocfs2_super *osb,
+		       struct ocfs2_cached_dealloc_ctxt *ctxt)
+{
+	int ret = 0, ret2;
+	struct ocfs2_per_slot_free_list *fl;
+
+	if (!ctxt)
+		return 0;
+
+	while (ctxt->c_first_suballocator) {
+		fl = ctxt->c_first_suballocator;
+
+		if (fl->f_first) {
+			mlog(0, "Free items: (type %u, slot %d)\n",
+			     fl->f_inode_type, fl->f_slot);
+			ret2 = ocfs2_free_cached_items(osb, fl->f_inode_type,
+						       fl->f_slot, fl->f_first);
+			if (ret2)
+				mlog_errno(ret2);
+			if (!ret)
+				ret = ret2;
+		}
+
+		ctxt->c_first_suballocator = fl->f_next_suballocator;
+		kfree(fl);
+	}
+
+	return ret;
+}
+
+static struct ocfs2_per_slot_free_list *
+ocfs2_find_per_slot_free_list(int type,
+			      int slot,
+			      struct ocfs2_cached_dealloc_ctxt *ctxt)
+{
+	struct ocfs2_per_slot_free_list *fl = ctxt->c_first_suballocator;
+
+	while (fl) {
+		if (fl->f_inode_type == type && fl->f_slot == slot)
+			return fl;
+
+		fl = fl->f_next_suballocator;
+	}
+
+	fl = kmalloc(sizeof(*fl), GFP_NOFS);
+	if (fl) {
+		fl->f_inode_type = type;
+		fl->f_slot = slot;
+		fl->f_first = NULL;
+		fl->f_next_suballocator = ctxt->c_first_suballocator;
+
+		ctxt->c_first_suballocator = fl;
+	}
+	return fl;
+}
+
+static int ocfs2_cache_block_dealloc(struct ocfs2_cached_dealloc_ctxt *ctxt,
+				     int type, int slot, u64 blkno,
+				     unsigned int bit)
+{
+	int ret;
+	struct ocfs2_per_slot_free_list *fl;
+	struct ocfs2_cached_block_free *item;
+
+	fl = ocfs2_find_per_slot_free_list(type, slot, ctxt);
+	if (fl == NULL) {
+		ret = -ENOMEM;
+		mlog_errno(ret);
+		goto out;
+	}
+
+	item = kmalloc(sizeof(*item), GFP_NOFS);
+	if (item == NULL) {
+		ret = -ENOMEM;
+		mlog_errno(ret);
+		goto out;
+	}
+
+	mlog(0, "Insert: (type %d, slot %u, bit %u, blk %llu)\n",
+	     type, slot, bit, (unsigned long long)blkno);
+
+	item->free_blk = blkno;
+	item->free_bit = bit;
+	item->free_next = fl->f_first;
+
+	fl->f_first = item;
+
+	ret = 0;
+out:
+	return ret;
+}
+
+static int ocfs2_cache_extent_block_free(struct ocfs2_cached_dealloc_ctxt *ctxt,
+					 struct ocfs2_extent_block *eb)
+{
+	return ocfs2_cache_block_dealloc(ctxt, EXTENT_ALLOC_SYSTEM_INODE,
+					 le16_to_cpu(eb->h_suballoc_slot),
+					 le64_to_cpu(eb->h_blkno),
+					 le16_to_cpu(eb->h_suballoc_bit));
+}
+
 /* This function will figure out whether the currently last extent
  * block will be deleted, and if it will, what the new last extent
  * block will be so we can update his h_next_leaf_blk field, as well
@@ -3238,27 +5526,10 @@ delete:
 			BUG_ON(le32_to_cpu(el->l_recs[0].e_cpos));
 			BUG_ON(le64_to_cpu(el->l_recs[0].e_blkno));
 
-			if (le16_to_cpu(eb->h_suballoc_slot) == 0) {
-				/*
-				 * This code only understands how to
-				 * lock the suballocator in slot 0,
-				 * which is fine because allocation is
-				 * only ever done out of that
-				 * suballocator too. A future version
-				 * might change that however, so avoid
-				 * a free if we don't know how to
-				 * handle it. This way an fs incompat
-				 * bit will not be necessary.
-				 */
-				ret = ocfs2_free_extent_block(handle,
-							      tc->tc_ext_alloc_inode,
-							      tc->tc_ext_alloc_bh,
-							      eb);
-
-				/* An error here is not fatal. */
-				if (ret < 0)
-					mlog_errno(ret);
-			}
+			ret = ocfs2_cache_extent_block_free(&tc->tc_dealloc, eb);
+			/* An error here is not fatal. */
+			if (ret < 0)
+				mlog_errno(ret);
 		} else {
 			deleted_eb = 0;
 		}
@@ -3397,9 +5668,9 @@ static int ocfs2_ordered_zero_func(handle_t *handle, struct buffer_head *bh)
 	return ocfs2_journal_dirty_data(handle, bh);
 }
 
-static void ocfs2_zero_cluster_pages(struct inode *inode, loff_t isize,
-				     struct page **pages, int numpages,
-				     u64 phys, handle_t *handle)
+static void ocfs2_zero_cluster_pages(struct inode *inode, loff_t start,
+				     loff_t end, struct page **pages,
+				     int numpages, u64 phys, handle_t *handle)
 {
 	int i, ret, partial = 0;
 	void *kaddr;
@@ -3412,26 +5683,14 @@ static void ocfs2_zero_cluster_pages(struct inode *inode, loff_t isize,
 	if (numpages == 0)
 		goto out;
 
-	from = isize & (PAGE_CACHE_SIZE - 1); /* 1st page offset */
-	if (PAGE_CACHE_SHIFT > OCFS2_SB(sb)->s_clustersize_bits) {
-		/*
-		 * Since 'from' has been capped to a value below page
-		 * size, this calculation won't be able to overflow
-		 * 'to'
-		 */
-		to = ocfs2_align_bytes_to_clusters(sb, from);
-
-		/*
-		 * The truncate tail in this case should never contain
-		 * more than one page at maximum. The loop below also
-		 * assumes this.
-		 */
-		BUG_ON(numpages != 1);
-	}
-
+	to = PAGE_CACHE_SIZE;
 	for(i = 0; i < numpages; i++) {
 		page = pages[i];
 
+		from = start & (PAGE_CACHE_SIZE - 1);
+		if ((end >> PAGE_CACHE_SHIFT) == page->index)
+			to = end & (PAGE_CACHE_SIZE - 1);
+
 		BUG_ON(from > PAGE_CACHE_SIZE);
 		BUG_ON(to > PAGE_CACHE_SIZE);
 
@@ -3468,10 +5727,7 @@ static void ocfs2_zero_cluster_pages(struct inode *inode, loff_t isize,
 
 		flush_dcache_page(page);
 
-		/*
-		 * Every page after the 1st one should be completely zero'd.
-		 */
-		from = 0;
+		start = (page->index + 1) << PAGE_CACHE_SHIFT;
 	}
 out:
 	if (pages) {
@@ -3484,24 +5740,26 @@ out:
 	}
 }
 
-static int ocfs2_grab_eof_pages(struct inode *inode, loff_t isize, struct page **pages,
-				int *num, u64 *phys)
+static int ocfs2_grab_eof_pages(struct inode *inode, loff_t start, loff_t end,
+				struct page **pages, int *num, u64 *phys)
 {
 	int i, numpages = 0, ret = 0;
-	unsigned int csize = OCFS2_SB(inode->i_sb)->s_clustersize;
 	unsigned int ext_flags;
 	struct super_block *sb = inode->i_sb;
 	struct address_space *mapping = inode->i_mapping;
 	unsigned long index;
-	u64 next_cluster_bytes;
+	loff_t last_page_bytes;
 
 	BUG_ON(!ocfs2_sparse_alloc(OCFS2_SB(sb)));
+	BUG_ON(start > end);
 
-	/* Cluster boundary, so we don't need to grab any pages. */
-	if ((isize & (csize - 1)) == 0)
+	if (start == end)
 		goto out;
 
-	ret = ocfs2_extent_map_get_blocks(inode, isize >> sb->s_blocksize_bits,
+	BUG_ON(start >> OCFS2_SB(sb)->s_clustersize_bits !=
+	       (end - 1) >> OCFS2_SB(sb)->s_clustersize_bits);
+
+	ret = ocfs2_extent_map_get_blocks(inode, start >> sb->s_blocksize_bits,
 					  phys, NULL, &ext_flags);
 	if (ret) {
 		mlog_errno(ret);
@@ -3517,8 +5775,8 @@ static int ocfs2_grab_eof_pages(struct inode *inode, loff_t isize, struct page *
 	if (ext_flags & OCFS2_EXT_UNWRITTEN)
 		goto out;
 
-	next_cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, isize);
-	index = isize >> PAGE_CACHE_SHIFT;
+	last_page_bytes = PAGE_ALIGN(end);
+	index = start >> PAGE_CACHE_SHIFT;
 	do {
 		pages[numpages] = grab_cache_page(mapping, index);
 		if (!pages[numpages]) {
@@ -3529,7 +5787,7 @@ static int ocfs2_grab_eof_pages(struct inode *inode, loff_t isize, struct page *
 
 		numpages++;
 		index++;
-	} while (index < (next_cluster_bytes >> PAGE_CACHE_SHIFT));
+	} while (index < (last_page_bytes >> PAGE_CACHE_SHIFT));
 
 out:
 	if (ret != 0) {
@@ -3558,11 +5816,10 @@ out:
  * otherwise block_write_full_page() will skip writeout of pages past
  * i_size. The new_i_size parameter is passed for this reason.
  */
-int ocfs2_zero_tail_for_truncate(struct inode *inode, handle_t *handle,
-				 u64 new_i_size)
+int ocfs2_zero_range_for_truncate(struct inode *inode, handle_t *handle,
+				  u64 range_start, u64 range_end)
 {
 	int ret, numpages;
-	loff_t endbyte;
 	struct page **pages = NULL;
 	u64 phys;
 
@@ -3581,7 +5838,8 @@ int ocfs2_zero_tail_for_truncate(struct inode *inode, handle_t *handle,
 		goto out;
 	}
 
-	ret = ocfs2_grab_eof_pages(inode, new_i_size, pages, &numpages, &phys);
+	ret = ocfs2_grab_eof_pages(inode, range_start, range_end, pages,
+				   &numpages, &phys);
 	if (ret) {
 		mlog_errno(ret);
 		goto out;
@@ -3590,17 +5848,16 @@ int ocfs2_zero_tail_for_truncate(struct inode *inode, handle_t *handle,
 	if (numpages == 0)
 		goto out;
 
-	ocfs2_zero_cluster_pages(inode, new_i_size, pages, numpages, phys,
-				 handle);
+	ocfs2_zero_cluster_pages(inode, range_start, range_end, pages,
+				 numpages, phys, handle);
 
 	/*
 	 * Initiate writeout of the pages we zero'd here. We don't
 	 * wait on them - the truncate_inode_pages() call later will
 	 * do that for us.
 	 */
-	endbyte = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
-	ret = do_sync_mapping_range(inode->i_mapping, new_i_size,
-				    endbyte - 1, SYNC_FILE_RANGE_WRITE);
+	ret = do_sync_mapping_range(inode->i_mapping, range_start,
+				    range_end - 1, SYNC_FILE_RANGE_WRITE);
 	if (ret)
 		mlog_errno(ret);
 
@@ -3631,8 +5888,6 @@ int ocfs2_commit_truncate(struct ocfs2_super *osb,
 
 	mlog_entry_void();
 
-	down_write(&OCFS2_I(inode)->ip_alloc_sem);
-
 	new_highest_cpos = ocfs2_clusters_for_bytes(osb->sb,
 						     i_size_read(inode));
 
@@ -3754,7 +6009,6 @@ start:
 	goto start;
 
 bail:
-	up_write(&OCFS2_I(inode)->ip_alloc_sem);
 
 	ocfs2_schedule_truncate_log_flush(osb, 1);
 
@@ -3764,6 +6018,8 @@ bail:
 	if (handle)
 		ocfs2_commit_trans(osb, handle);
 
+	ocfs2_run_deallocs(osb, &tc->tc_dealloc);
+
 	ocfs2_free_path(path);
 
 	/* This will drop the ext_alloc cluster lock for us */
@@ -3774,23 +6030,18 @@ bail:
 }
 
 /*
- * Expects the inode to already be locked. This will figure out which
- * inodes need to be locked and will put them on the returned truncate
- * context.
+ * Expects the inode to already be locked.
  */
 int ocfs2_prepare_truncate(struct ocfs2_super *osb,
 			   struct inode *inode,
 			   struct buffer_head *fe_bh,
 			   struct ocfs2_truncate_context **tc)
 {
-	int status, metadata_delete, i;
+	int status;
 	unsigned int new_i_clusters;
 	struct ocfs2_dinode *fe;
 	struct ocfs2_extent_block *eb;
-	struct ocfs2_extent_list *el;
 	struct buffer_head *last_eb_bh = NULL;
-	struct inode *ext_alloc_inode = NULL;
-	struct buffer_head *ext_alloc_bh = NULL;
 
 	mlog_entry_void();
 
@@ -3810,12 +6061,9 @@ int ocfs2_prepare_truncate(struct ocfs2_super *osb,
 		mlog_errno(status);
 		goto bail;
 	}
+	ocfs2_init_dealloc_ctxt(&(*tc)->tc_dealloc);
 
-	metadata_delete = 0;
 	if (fe->id2.i_list.l_tree_depth) {
-		/* If we have a tree, then the truncate may result in
-		 * metadata deletes. Figure this out from the
-		 * rightmost leaf block.*/
 		status = ocfs2_read_block(osb, le64_to_cpu(fe->i_last_eb_blk),
 					  &last_eb_bh, OCFS2_BH_CACHED, inode);
 		if (status < 0) {
@@ -3830,43 +6078,10 @@ int ocfs2_prepare_truncate(struct ocfs2_super *osb,
 			status = -EIO;
 			goto bail;
 		}
-		el = &(eb->h_list);
-
-		i = 0;
-		if (ocfs2_is_empty_extent(&el->l_recs[0]))
-			i = 1;
-		/*
-		 * XXX: Should we check that next_free_rec contains
-		 * the extent?
-		 */
-		if (le32_to_cpu(el->l_recs[i].e_cpos) >= new_i_clusters)
-			metadata_delete = 1;
 	}
 
 	(*tc)->tc_last_eb_bh = last_eb_bh;
 
-	if (metadata_delete) {
-		mlog(0, "Will have to delete metadata for this trunc. "
-		     "locking allocator.\n");
-		ext_alloc_inode = ocfs2_get_system_file_inode(osb, EXTENT_ALLOC_SYSTEM_INODE, 0);
-		if (!ext_alloc_inode) {
-			status = -ENOMEM;
-			mlog_errno(status);
-			goto bail;
-		}
-
-		mutex_lock(&ext_alloc_inode->i_mutex);
-		(*tc)->tc_ext_alloc_inode = ext_alloc_inode;
-
-		status = ocfs2_meta_lock(ext_alloc_inode, &ext_alloc_bh, 1);
-		if (status < 0) {
-			mlog_errno(status);
-			goto bail;
-		}
-		(*tc)->tc_ext_alloc_bh = ext_alloc_bh;
-		(*tc)->tc_ext_alloc_locked = 1;
-	}
-
 	status = 0;
 bail:
 	if (status < 0) {
@@ -3880,16 +6095,13 @@ bail:
 
 static void ocfs2_free_truncate_context(struct ocfs2_truncate_context *tc)
 {
-	if (tc->tc_ext_alloc_inode) {
-		if (tc->tc_ext_alloc_locked)
-			ocfs2_meta_unlock(tc->tc_ext_alloc_inode, 1);
-
-		mutex_unlock(&tc->tc_ext_alloc_inode->i_mutex);
-		iput(tc->tc_ext_alloc_inode);
-	}
-
-	if (tc->tc_ext_alloc_bh)
-		brelse(tc->tc_ext_alloc_bh);
+	/*
+	 * The caller is responsible for completing deallocation
+	 * before freeing the context.
+	 */
+	if (tc->tc_dealloc.c_first_suballocator != NULL)
+		mlog(ML_NOTICE,
+		     "Truncate completion has non-empty dealloc context\n");
 
 	if (tc->tc_last_eb_bh)
 		brelse(tc->tc_last_eb_bh);
diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h
index fbcb593..990df48 100644
--- a/fs/ocfs2/alloc.h
+++ b/fs/ocfs2/alloc.h
@@ -34,7 +34,17 @@ int ocfs2_insert_extent(struct ocfs2_super *osb,
 			u32 cpos,
 			u64 start_blk,
 			u32 new_clusters,
+			u8 flags,
 			struct ocfs2_alloc_context *meta_ac);
+struct ocfs2_cached_dealloc_ctxt;
+int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *di_bh,
+			      handle_t *handle, u32 cpos, u32 len, u32 phys,
+			      struct ocfs2_alloc_context *meta_ac,
+			      struct ocfs2_cached_dealloc_ctxt *dealloc);
+int ocfs2_remove_extent(struct inode *inode, struct buffer_head *di_bh,
+			u32 cpos, u32 len, handle_t *handle,
+			struct ocfs2_alloc_context *meta_ac,
+			struct ocfs2_cached_dealloc_ctxt *dealloc);
 int ocfs2_num_free_extents(struct ocfs2_super *osb,
 			   struct inode *inode,
 			   struct ocfs2_dinode *fe);
@@ -62,17 +72,41 @@ int ocfs2_begin_truncate_log_recovery(struct ocfs2_super *osb,
 				      struct ocfs2_dinode **tl_copy);
 int ocfs2_complete_truncate_log_recovery(struct ocfs2_super *osb,
 					 struct ocfs2_dinode *tl_copy);
+int ocfs2_truncate_log_needs_flush(struct ocfs2_super *osb);
+int ocfs2_truncate_log_append(struct ocfs2_super *osb,
+			      handle_t *handle,
+			      u64 start_blk,
+			      unsigned int num_clusters);
+int __ocfs2_flush_truncate_log(struct ocfs2_super *osb);
+
+/*
+ * Process local structure which describes the block unlinks done
+ * during an operation. This is populated via
+ * ocfs2_cache_block_dealloc().
+ *
+ * ocfs2_run_deallocs() should be called after the potentially
+ * de-allocating routines. No journal handles should be open, and most
+ * locks should have been dropped.
+ */
+struct ocfs2_cached_dealloc_ctxt {
+	struct ocfs2_per_slot_free_list		*c_first_suballocator;
+};
+static inline void ocfs2_init_dealloc_ctxt(struct ocfs2_cached_dealloc_ctxt *c)
+{
+	c->c_first_suballocator = NULL;
+}
+int ocfs2_run_deallocs(struct ocfs2_super *osb,
+		       struct ocfs2_cached_dealloc_ctxt *ctxt);
 
 struct ocfs2_truncate_context {
-	struct inode *tc_ext_alloc_inode;
-	struct buffer_head *tc_ext_alloc_bh;
+	struct ocfs2_cached_dealloc_ctxt tc_dealloc;
 	int tc_ext_alloc_locked; /* is it cluster locked? */
 	/* these get destroyed once it's passed to ocfs2_commit_truncate. */
 	struct buffer_head *tc_last_eb_bh;
 };
 
-int ocfs2_zero_tail_for_truncate(struct inode *inode, handle_t *handle,
-				 u64 new_i_size);
+int ocfs2_zero_range_for_truncate(struct inode *inode, handle_t *handle,
+				  u64 range_start, u64 range_end);
 int ocfs2_prepare_truncate(struct ocfs2_super *osb,
 			   struct inode *inode,
 			   struct buffer_head *fe_bh,
@@ -84,6 +118,7 @@ int ocfs2_commit_truncate(struct ocfs2_super *osb,
 
 int ocfs2_find_leaf(struct inode *inode, struct ocfs2_extent_list *root_el,
 		    u32 cpos, struct buffer_head **leaf_bh);
+int ocfs2_search_extent_list(struct ocfs2_extent_list *el, u32 v_cluster);
 
 /*
  * Helper function to look at the # of clusters in an extent record.
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index a480b09..84bf6e7 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -684,6 +684,8 @@ int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
 	     bh = bh->b_this_page, block_start += bsize) {
 		block_end = block_start + bsize;
 
+		clear_buffer_new(bh);
+
 		/*
 		 * Ignore blocks outside of our i/o range -
 		 * they may belong to unallocated clusters.
@@ -698,9 +700,8 @@ int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
 		 * For an allocating write with cluster size >= page
 		 * size, we always write the entire page.
 		 */
-
-		if (buffer_new(bh))
-			clear_buffer_new(bh);
+		if (new)
+			set_buffer_new(bh);
 
 		if (!buffer_mapped(bh)) {
 			map_bh(bh, inode->i_sb, *p_blkno);
@@ -711,7 +712,8 @@ int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
 			if (!buffer_uptodate(bh))
 				set_buffer_uptodate(bh);
 		} else if (!buffer_uptodate(bh) && !buffer_delay(bh) &&
-		     (block_start < from || block_end > to)) {
+			   !buffer_new(bh) &&
+			   (block_start < from || block_end > to)) {
 			ll_rw_block(READ, 1, &bh);
 			*wait_bh++=bh;
 		}
@@ -738,18 +740,13 @@ int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
 	bh = head;
 	block_start = 0;
 	do {
-		void *kaddr;
-
 		block_end = block_start + bsize;
 		if (block_end <= from)
 			goto next_bh;
 		if (block_start >= to)
 			break;
 
-		kaddr = kmap_atomic(page, KM_USER0);
-		memset(kaddr+block_start, 0, bh->b_size);
-		flush_dcache_page(page);
-		kunmap_atomic(kaddr, KM_USER0);
+		zero_user_page(page, block_start, bh->b_size, KM_USER0);
 		set_buffer_uptodate(bh);
 		mark_buffer_dirty(bh);
 
@@ -761,217 +758,240 @@ next_bh:
 	return ret;
 }
 
+#if (PAGE_CACHE_SIZE >= OCFS2_MAX_CLUSTERSIZE)
+#define OCFS2_MAX_CTXT_PAGES	1
+#else
+#define OCFS2_MAX_CTXT_PAGES	(OCFS2_MAX_CLUSTERSIZE / PAGE_CACHE_SIZE)
+#endif
+
+#define OCFS2_MAX_CLUSTERS_PER_PAGE	(PAGE_CACHE_SIZE / OCFS2_MIN_CLUSTERSIZE)
+
 /*
- * This will copy user data from the buffer page in the splice
- * context.
- *
- * For now, we ignore SPLICE_F_MOVE as that would require some extra
- * communication out all the way to ocfs2_write().
+ * Describe the state of a single cluster to be written to.
  */
-int ocfs2_map_and_write_splice_data(struct inode *inode,
-				  struct ocfs2_write_ctxt *wc, u64 *p_blkno,
-				  unsigned int *ret_from, unsigned int *ret_to)
+struct ocfs2_write_cluster_desc {
+	u32		c_cpos;
+	u32		c_phys;
+	/*
+	 * Give this a unique field because c_phys eventually gets
+	 * filled.
+	 */
+	unsigned	c_new;
+	unsigned	c_unwritten;
+};
+
+static inline int ocfs2_should_zero_cluster(struct ocfs2_write_cluster_desc *d)
 {
-	int ret;
-	unsigned int to, from, cluster_start, cluster_end;
-	char *src, *dst;
-	struct ocfs2_splice_write_priv *sp = wc->w_private;
-	struct pipe_buffer *buf = sp->s_buf;
-	unsigned long bytes, src_from;
-	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+	return d->c_new || d->c_unwritten;
+}
 
-	ocfs2_figure_cluster_boundaries(osb, wc->w_cpos, &cluster_start,
-					&cluster_end);
+struct ocfs2_write_ctxt {
+	/* Logical cluster position / len of write */
+	u32				w_cpos;
+	u32				w_clen;
 
-	from = sp->s_offset;
-	src_from = sp->s_buf_offset;
-	bytes = wc->w_count;
+	struct ocfs2_write_cluster_desc	w_desc[OCFS2_MAX_CLUSTERS_PER_PAGE];
 
-	if (wc->w_large_pages) {
-		/*
-		 * For cluster size < page size, we have to
-		 * calculate pos within the cluster and obey
-		 * the rightmost boundary.
-		 */
-		bytes = min(bytes, (unsigned long)(osb->s_clustersize
-				   - (wc->w_pos & (osb->s_clustersize - 1))));
-	}
-	to = from + bytes;
+	/*
+	 * This is true if page_size > cluster_size.
+	 *
+	 * It triggers a set of special cases during write which might
+	 * have to deal with allocating writes to partial pages.
+	 */
+	unsigned int			w_large_pages;
+
+	/*
+	 * Pages involved in this write.
+	 *
+	 * w_target_page is the page being written to by the user.
+	 *
+	 * w_pages is an array of pages which always contains
+	 * w_target_page, and in the case of an allocating write with
+	 * page_size < cluster size, it will contain zero'd and mapped
+	 * pages adjacent to w_target_page which need to be written
+	 * out in so that future reads from that region will get
+	 * zero's.
+	 */
+	struct page			*w_pages[OCFS2_MAX_CTXT_PAGES];
+	unsigned int			w_num_pages;
+	struct page			*w_target_page;
 
-	BUG_ON(from > PAGE_CACHE_SIZE);
-	BUG_ON(to > PAGE_CACHE_SIZE);
-	BUG_ON(from < cluster_start);
-	BUG_ON(to > cluster_end);
+	/*
+	 * ocfs2_write_end() uses this to know what the real range to
+	 * write in the target should be.
+	 */
+	unsigned int			w_target_from;
+	unsigned int			w_target_to;
 
-	if (wc->w_this_page_new)
-		ret = ocfs2_map_page_blocks(wc->w_this_page, p_blkno, inode,
-					    cluster_start, cluster_end, 1);
-	else
-		ret = ocfs2_map_page_blocks(wc->w_this_page, p_blkno, inode,
-					    from, to, 0);
-	if (ret) {
-		mlog_errno(ret);
-		goto out;
+	/*
+	 * We could use journal_current_handle() but this is cleaner,
+	 * IMHO -Mark
+	 */
+	handle_t			*w_handle;
+
+	struct buffer_head		*w_di_bh;
+
+	struct ocfs2_cached_dealloc_ctxt w_dealloc;
+};
+
+static void ocfs2_free_write_ctxt(struct ocfs2_write_ctxt *wc)
+{
+	int i;
+
+	for(i = 0; i < wc->w_num_pages; i++) {
+		if (wc->w_pages[i] == NULL)
+			continue;
+
+		unlock_page(wc->w_pages[i]);
+		mark_page_accessed(wc->w_pages[i]);
+		page_cache_release(wc->w_pages[i]);
 	}
 
-	src = buf->ops->map(sp->s_pipe, buf, 1);
-	dst = kmap_atomic(wc->w_this_page, KM_USER1);
-	memcpy(dst + from, src + src_from, bytes);
-	kunmap_atomic(wc->w_this_page, KM_USER1);
-	buf->ops->unmap(sp->s_pipe, buf, src);
+	brelse(wc->w_di_bh);
+	kfree(wc);
+}
+
+static int ocfs2_alloc_write_ctxt(struct ocfs2_write_ctxt **wcp,
+				  struct ocfs2_super *osb, loff_t pos,
+				  unsigned len, struct buffer_head *di_bh)
+{
+	struct ocfs2_write_ctxt *wc;
+
+	wc = kzalloc(sizeof(struct ocfs2_write_ctxt), GFP_NOFS);
+	if (!wc)
+		return -ENOMEM;
 
-	wc->w_finished_copy = 1;
+	wc->w_cpos = pos >> osb->s_clustersize_bits;
+	wc->w_clen = ocfs2_clusters_for_bytes(osb->sb, len);
+	get_bh(di_bh);
+	wc->w_di_bh = di_bh;
 
-	*ret_from = from;
-	*ret_to = to;
-out:
+	if (unlikely(PAGE_CACHE_SHIFT > osb->s_clustersize_bits))
+		wc->w_large_pages = 1;
+	else
+		wc->w_large_pages = 0;
+
+	ocfs2_init_dealloc_ctxt(&wc->w_dealloc);
+
+	*wcp = wc;
 
-	return bytes ? (unsigned int)bytes : ret;
+	return 0;
 }
 
 /*
- * This will copy user data from the iovec in the buffered write
- * context.
+ * If a page has any new buffers, zero them out here, and mark them uptodate
+ * and dirty so they'll be written out (in order to prevent uninitialised
+ * block data from leaking). And clear the new bit.
  */
-int ocfs2_map_and_write_user_data(struct inode *inode,
-				  struct ocfs2_write_ctxt *wc, u64 *p_blkno,
-				  unsigned int *ret_from, unsigned int *ret_to)
+static void ocfs2_zero_new_buffers(struct page *page, unsigned from, unsigned to)
 {
-	int ret;
-	unsigned int to, from, cluster_start, cluster_end;
-	unsigned long bytes, src_from;
-	char *dst;
-	struct ocfs2_buffered_write_priv *bp = wc->w_private;
-	const struct iovec *cur_iov = bp->b_cur_iov;
-	char __user *buf;
-	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+	unsigned int block_start, block_end;
+	struct buffer_head *head, *bh;
 
-	ocfs2_figure_cluster_boundaries(osb, wc->w_cpos, &cluster_start,
-					&cluster_end);
+	BUG_ON(!PageLocked(page));
+	if (!page_has_buffers(page))
+		return;
 
-	buf = cur_iov->iov_base + bp->b_cur_off;
-	src_from = (unsigned long)buf & ~PAGE_CACHE_MASK;
+	bh = head = page_buffers(page);
+	block_start = 0;
+	do {
+		block_end = block_start + bh->b_size;
 
-	from = wc->w_pos & (PAGE_CACHE_SIZE - 1);
+		if (buffer_new(bh)) {
+			if (block_end > from && block_start < to) {
+				if (!PageUptodate(page)) {
+					unsigned start, end;
 
-	/*
-	 * This is a lot of comparisons, but it reads quite
-	 * easily, which is important here.
-	 */
-	/* Stay within the src page */
-	bytes = PAGE_SIZE - src_from;
-	/* Stay within the vector */
-	bytes = min(bytes,
-		    (unsigned long)(cur_iov->iov_len - bp->b_cur_off));
-	/* Stay within count */
-	bytes = min(bytes, (unsigned long)wc->w_count);
-	/*
-	 * For clustersize > page size, just stay within
-	 * target page, otherwise we have to calculate pos
-	 * within the cluster and obey the rightmost
-	 * boundary.
-	 */
-	if (wc->w_large_pages) {
-		/*
-		 * For cluster size < page size, we have to
-		 * calculate pos within the cluster and obey
-		 * the rightmost boundary.
-		 */
-		bytes = min(bytes, (unsigned long)(osb->s_clustersize
-				   - (wc->w_pos & (osb->s_clustersize - 1))));
-	} else {
-		/*
-		 * cluster size > page size is the most common
-		 * case - we just stay within the target page
-		 * boundary.
-		 */
-		bytes = min(bytes, PAGE_CACHE_SIZE - from);
-	}
+					start = max(from, block_start);
+					end = min(to, block_end);
 
-	to = from + bytes;
+					zero_user_page(page, start, end - start, KM_USER0);
+					set_buffer_uptodate(bh);
+				}
 
-	BUG_ON(from > PAGE_CACHE_SIZE);
-	BUG_ON(to > PAGE_CACHE_SIZE);
-	BUG_ON(from < cluster_start);
-	BUG_ON(to > cluster_end);
+				clear_buffer_new(bh);
+				mark_buffer_dirty(bh);
+			}
+		}
 
-	if (wc->w_this_page_new)
-		ret = ocfs2_map_page_blocks(wc->w_this_page, p_blkno, inode,
-					    cluster_start, cluster_end, 1);
-	else
-		ret = ocfs2_map_page_blocks(wc->w_this_page, p_blkno, inode,
-					    from, to, 0);
-	if (ret) {
-		mlog_errno(ret);
-		goto out;
-	}
+		block_start = block_end;
+		bh = bh->b_this_page;
+	} while (bh != head);
+}
 
-	dst = kmap(wc->w_this_page);
-	memcpy(dst + from, bp->b_src_buf + src_from, bytes);
-	kunmap(wc->w_this_page);
+/*
+ * Only called when we have a failure during allocating write to write
+ * zero's to the newly allocated region.
+ */
+static void ocfs2_write_failure(struct inode *inode,
+				struct ocfs2_write_ctxt *wc,
+				loff_t user_pos, unsigned user_len)
+{
+	int i;
+	unsigned from, to;
+	struct page *tmppage;
 
-	/*
-	 * XXX: This is slow, but simple. The caller of
-	 * ocfs2_buffered_write_cluster() is responsible for
-	 * passing through the iovecs, so it's difficult to
-	 * predict what our next step is in here after our
-	 * initial write. A future version should be pushing
-	 * that iovec manipulation further down.
-	 *
-	 * By setting this, we indicate that a copy from user
-	 * data was done, and subsequent calls for this
-	 * cluster will skip copying more data.
-	 */
-	wc->w_finished_copy = 1;
+	ocfs2_zero_new_buffers(wc->w_target_page, user_pos, user_len);
 
-	*ret_from = from;
-	*ret_to = to;
-out:
+	if (wc->w_large_pages) {
+		from = wc->w_target_from;
+		to = wc->w_target_to;
+	} else {
+		from = 0;
+		to = PAGE_CACHE_SIZE;
+	}
+
+	for(i = 0; i < wc->w_num_pages; i++) {
+		tmppage = wc->w_pages[i];
 
-	return bytes ? (unsigned int)bytes : ret;
+		if (ocfs2_should_order_data(inode))
+			walk_page_buffers(wc->w_handle, page_buffers(tmppage),
+					  from, to, NULL,
+					  ocfs2_journal_dirty_data);
+
+		block_commit_write(tmppage, from, to);
+	}
 }
 
-/*
- * Map, fill and write a page to disk.
- *
- * The work of copying data is done via callback.  Newly allocated
- * pages which don't take user data will be zero'd (set 'new' to
- * indicate an allocating write)
- *
- * Returns a negative error code or the number of bytes copied into
- * the page.
- */
-static int ocfs2_write_data_page(struct inode *inode, handle_t *handle,
-				 u64 *p_blkno, struct page *page,
-				 struct ocfs2_write_ctxt *wc, int new)
+static int ocfs2_prepare_page_for_write(struct inode *inode, u64 *p_blkno,
+					struct ocfs2_write_ctxt *wc,
+					struct page *page, u32 cpos,
+					loff_t user_pos, unsigned user_len,
+					int new)
 {
-	int ret, copied = 0;
-	unsigned int from = 0, to = 0;
+	int ret;
+	unsigned int map_from = 0, map_to = 0;
 	unsigned int cluster_start, cluster_end;
-	unsigned int zero_from = 0, zero_to = 0;
+	unsigned int user_data_from = 0, user_data_to = 0;
 
-	ocfs2_figure_cluster_boundaries(OCFS2_SB(inode->i_sb), wc->w_cpos,
+	ocfs2_figure_cluster_boundaries(OCFS2_SB(inode->i_sb), cpos,
 					&cluster_start, &cluster_end);
 
-	if ((wc->w_pos >> PAGE_CACHE_SHIFT) == page->index
-	    && !wc->w_finished_copy) {
-
-		wc->w_this_page = page;
-		wc->w_this_page_new = new;
-		ret = wc->w_write_data_page(inode, wc, p_blkno, &from, &to);
-		if (ret < 0) {
+	if (page == wc->w_target_page) {
+		map_from = user_pos & (PAGE_CACHE_SIZE - 1);
+		map_to = map_from + user_len;
+
+		if (new)
+			ret = ocfs2_map_page_blocks(page, p_blkno, inode,
+						    cluster_start, cluster_end,
+						    new);
+		else
+			ret = ocfs2_map_page_blocks(page, p_blkno, inode,
+						    map_from, map_to, new);
+		if (ret) {
 			mlog_errno(ret);
 			goto out;
 		}
 
-		copied = ret;
-
-		zero_from = from;
-		zero_to = to;
+		user_data_from = map_from;
+		user_data_to = map_to;
 		if (new) {
-			from = cluster_start;
-			to = cluster_end;
+			map_from = cluster_start;
+			map_to = cluster_end;
 		}
+
+		wc->w_target_from = map_from;
+		wc->w_target_to = map_to;
 	} else {
 		/*
 		 * If we haven't allocated the new page yet, we
@@ -980,11 +1000,11 @@ static int ocfs2_write_data_page(struct inode *inode, handle_t *handle,
 		 */
 		BUG_ON(!new);
 
-		from = cluster_start;
-		to = cluster_end;
+		map_from = cluster_start;
+		map_to = cluster_end;
 
 		ret = ocfs2_map_page_blocks(page, p_blkno, inode,
-					    cluster_start, cluster_end, 1);
+					    cluster_start, cluster_end, new);
 		if (ret) {
 			mlog_errno(ret);
 			goto out;
@@ -1003,108 +1023,113 @@ static int ocfs2_write_data_page(struct inode *inode, handle_t *handle,
 	 */
 	if (new && !PageUptodate(page))
 		ocfs2_clear_page_regions(page, OCFS2_SB(inode->i_sb),
-					 wc->w_cpos, zero_from, zero_to);
+					 cpos, user_data_from, user_data_to);
 
 	flush_dcache_page(page);
 
-	if (ocfs2_should_order_data(inode)) {
-		ret = walk_page_buffers(handle,
-					page_buffers(page),
-					from, to, NULL,
-					ocfs2_journal_dirty_data);
-		if (ret < 0)
-			mlog_errno(ret);
-	}
-
-	/*
-	 * We don't use generic_commit_write() because we need to
-	 * handle our own i_size update.
-	 */
-	ret = block_commit_write(page, from, to);
-	if (ret)
-		mlog_errno(ret);
 out:
-
-	return copied ? copied : ret;
+	return ret;
 }
 
 /*
- * Do the actual write of some data into an inode. Optionally allocate
- * in order to fulfill the write.
- *
- * cpos is the logical cluster offset within the file to write at
- *
- * 'phys' is the physical mapping of that offset. a 'phys' value of
- * zero indicates that allocation is required. In this case, data_ac
- * and meta_ac should be valid (meta_ac can be null if metadata
- * allocation isn't required).
+ * This function will only grab one clusters worth of pages.
  */
-static ssize_t ocfs2_write(struct file *file, u32 phys, handle_t *handle,
-			   struct buffer_head *di_bh,
-			   struct ocfs2_alloc_context *data_ac,
-			   struct ocfs2_alloc_context *meta_ac,
-			   struct ocfs2_write_ctxt *wc)
+static int ocfs2_grab_pages_for_write(struct address_space *mapping,
+				      struct ocfs2_write_ctxt *wc,
+				      u32 cpos, loff_t user_pos, int new,
+				      struct page *mmap_page)
 {
-	int ret, i, numpages = 1, new;
-	unsigned int copied = 0;
-	u32 tmp_pos;
-	u64 v_blkno, p_blkno;
-	struct address_space *mapping = file->f_mapping;
+	int ret = 0, i;
+	unsigned long start, target_index, index;
 	struct inode *inode = mapping->host;
-	unsigned long index, start;
-	struct page **cpages;
 
-	new = phys == 0 ? 1 : 0;
+	target_index = user_pos >> PAGE_CACHE_SHIFT;
 
 	/*
 	 * Figure out how many pages we'll be manipulating here. For
 	 * non allocating write, we just change the one
 	 * page. Otherwise, we'll need a whole clusters worth.
 	 */
-	if (new)
-		numpages = ocfs2_pages_per_cluster(inode->i_sb);
-
-	cpages = kzalloc(sizeof(*cpages) * numpages, GFP_NOFS);
-	if (!cpages) {
-		ret = -ENOMEM;
-		mlog_errno(ret);
-		return ret;
-	}
-
-	/*
-	 * Fill our page array first. That way we've grabbed enough so
-	 * that we can zero and flush if we error after adding the
-	 * extent.
-	 */
 	if (new) {
-		start = ocfs2_align_clusters_to_page_index(inode->i_sb,
-							   wc->w_cpos);
-		v_blkno = ocfs2_clusters_to_blocks(inode->i_sb, wc->w_cpos);
+		wc->w_num_pages = ocfs2_pages_per_cluster(inode->i_sb);
+		start = ocfs2_align_clusters_to_page_index(inode->i_sb, cpos);
 	} else {
-		start = wc->w_pos >> PAGE_CACHE_SHIFT;
-		v_blkno = wc->w_pos >> inode->i_sb->s_blocksize_bits;
+		wc->w_num_pages = 1;
+		start = target_index;
 	}
 
-	for(i = 0; i < numpages; i++) {
+	for(i = 0; i < wc->w_num_pages; i++) {
 		index = start + i;
 
-		cpages[i] = find_or_create_page(mapping, index, GFP_NOFS);
-		if (!cpages[i]) {
-			ret = -ENOMEM;
-			mlog_errno(ret);
-			goto out;
+		if (index == target_index && mmap_page) {
+			/*
+			 * ocfs2_pagemkwrite() is a little different
+			 * and wants us to directly use the page
+			 * passed in.
+			 */
+			lock_page(mmap_page);
+
+			if (mmap_page->mapping != mapping) {
+				unlock_page(mmap_page);
+				/*
+				 * Sanity check - the locking in
+				 * ocfs2_pagemkwrite() should ensure
+				 * that this code doesn't trigger.
+				 */
+				ret = -EINVAL;
+				mlog_errno(ret);
+				goto out;
+			}
+
+			page_cache_get(mmap_page);
+			wc->w_pages[i] = mmap_page;
+		} else {
+			wc->w_pages[i] = find_or_create_page(mapping, index,
+							     GFP_NOFS);
+			if (!wc->w_pages[i]) {
+				ret = -ENOMEM;
+				mlog_errno(ret);
+				goto out;
+			}
 		}
+
+		if (index == target_index)
+			wc->w_target_page = wc->w_pages[i];
 	}
+out:
+	return ret;
+}
+
+/*
+ * Prepare a single cluster for write one cluster into the file.
+ */
+static int ocfs2_write_cluster(struct address_space *mapping,
+			       u32 phys, unsigned int unwritten,
+			       struct ocfs2_alloc_context *data_ac,
+			       struct ocfs2_alloc_context *meta_ac,
+			       struct ocfs2_write_ctxt *wc, u32 cpos,
+			       loff_t user_pos, unsigned user_len)
+{
+	int ret, i, new, should_zero = 0;
+	u64 v_blkno, p_blkno;
+	struct inode *inode = mapping->host;
+
+	new = phys == 0 ? 1 : 0;
+	if (new || unwritten)
+		should_zero = 1;
 
 	if (new) {
+		u32 tmp_pos;
+
 		/*
 		 * This is safe to call with the page locks - it won't take
 		 * any additional semaphores or cluster locks.
 		 */
-		tmp_pos = wc->w_cpos;
+		tmp_pos = cpos;
 		ret = ocfs2_do_extend_allocation(OCFS2_SB(inode->i_sb), inode,
-						 &tmp_pos, 1, di_bh, handle,
-						 data_ac, meta_ac, NULL);
+						 &tmp_pos, 1, 0, wc->w_di_bh,
+						 wc->w_handle, data_ac,
+						 meta_ac, NULL);
 		/*
 		 * This shouldn't happen because we must have already
 		 * calculated the correct meta data allocation required. The
@@ -1121,159 +1146,433 @@ static ssize_t ocfs2_write(struct file *file, u32 phys, handle_t *handle,
 			mlog_errno(ret);
 			goto out;
 		}
+	} else if (unwritten) {
+		ret = ocfs2_mark_extent_written(inode, wc->w_di_bh,
+						wc->w_handle, cpos, 1, phys,
+						meta_ac, &wc->w_dealloc);
+		if (ret < 0) {
+			mlog_errno(ret);
+			goto out;
+		}
 	}
 
+	if (should_zero)
+		v_blkno = ocfs2_clusters_to_blocks(inode->i_sb, cpos);
+	else
+		v_blkno = user_pos >> inode->i_sb->s_blocksize_bits;
+
+	/*
+	 * The only reason this should fail is due to an inability to
+	 * find the extent added.
+	 */
 	ret = ocfs2_extent_map_get_blocks(inode, v_blkno, &p_blkno, NULL,
 					  NULL);
 	if (ret < 0) {
-
-		/*
-		 * XXX: Should we go readonly here?
-		 */
-
-		mlog_errno(ret);
+		ocfs2_error(inode->i_sb, "Corrupting extend for inode %llu, "
+			    "at logical block %llu",
+			    (unsigned long long)OCFS2_I(inode)->ip_blkno,
+			    (unsigned long long)v_blkno);
 		goto out;
 	}
 
 	BUG_ON(p_blkno == 0);
 
-	for(i = 0; i < numpages; i++) {
-		ret = ocfs2_write_data_page(inode, handle, &p_blkno, cpages[i],
-					    wc, new);
-		if (ret < 0) {
-			mlog_errno(ret);
-			goto out;
+	for(i = 0; i < wc->w_num_pages; i++) {
+		int tmpret;
+
+		tmpret = ocfs2_prepare_page_for_write(inode, &p_blkno, wc,
+						      wc->w_pages[i], cpos,
+						      user_pos, user_len,
+						      should_zero);
+		if (tmpret) {
+			mlog_errno(tmpret);
+			if (ret == 0)
+				tmpret = ret;
 		}
-
-		copied += ret;
 	}
 
+	/*
+	 * We only have cleanup to do in case of allocating write.
+	 */
+	if (ret && new)
+		ocfs2_write_failure(inode, wc, user_pos, user_len);
+
 out:
-	for(i = 0; i < numpages; i++) {
-		unlock_page(cpages[i]);
-		mark_page_accessed(cpages[i]);
-		page_cache_release(cpages[i]);
+
+	return ret;
+}
+
+static int ocfs2_write_cluster_by_desc(struct address_space *mapping,
+				       struct ocfs2_alloc_context *data_ac,
+				       struct ocfs2_alloc_context *meta_ac,
+				       struct ocfs2_write_ctxt *wc,
+				       loff_t pos, unsigned len)
+{
+	int ret, i;
+	struct ocfs2_write_cluster_desc *desc;
+
+	for (i = 0; i < wc->w_clen; i++) {
+		desc = &wc->w_desc[i];
+
+		ret = ocfs2_write_cluster(mapping, desc->c_phys,
+					  desc->c_unwritten, data_ac, meta_ac,
+					  wc, desc->c_cpos, pos, len);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
 	}
-	kfree(cpages);
 
-	return copied ? copied : ret;
+	ret = 0;
+out:
+	return ret;
 }
 
-static void ocfs2_write_ctxt_init(struct ocfs2_write_ctxt *wc,
-				  struct ocfs2_super *osb, loff_t pos,
-				  size_t count, ocfs2_page_writer *cb,
-				  void *cb_priv)
+/*
+ * ocfs2_write_end() wants to know which parts of the target page it
+ * should complete the write on. It's easiest to compute them ahead of
+ * time when a more complete view of the write is available.
+ */
+static void ocfs2_set_target_boundaries(struct ocfs2_super *osb,
+					struct ocfs2_write_ctxt *wc,
+					loff_t pos, unsigned len, int alloc)
 {
-	wc->w_count = count;
-	wc->w_pos = pos;
-	wc->w_cpos = wc->w_pos >> osb->s_clustersize_bits;
-	wc->w_finished_copy = 0;
+	struct ocfs2_write_cluster_desc *desc;
 
-	if (unlikely(PAGE_CACHE_SHIFT > osb->s_clustersize_bits))
-		wc->w_large_pages = 1;
-	else
-		wc->w_large_pages = 0;
+	wc->w_target_from = pos & (PAGE_CACHE_SIZE - 1);
+	wc->w_target_to = wc->w_target_from + len;
 
-	wc->w_write_data_page = cb;
-	wc->w_private = cb_priv;
+	if (alloc == 0)
+		return;
+
+	/*
+	 * Allocating write - we may have different boundaries based
+	 * on page size and cluster size.
+	 *
+	 * NOTE: We can no longer compute one value from the other as
+	 * the actual write length and user provided length may be
+	 * different.
+	 */
+
+	if (wc->w_large_pages) {
+		/*
+		 * We only care about the 1st and last cluster within
+		 * our range and whether they should be zero'd or not. Either
+		 * value may be extended out to the start/end of a
+		 * newly allocated cluster.
+		 */
+		desc = &wc->w_desc[0];
+		if (ocfs2_should_zero_cluster(desc))
+			ocfs2_figure_cluster_boundaries(osb,
+							desc->c_cpos,
+							&wc->w_target_from,
+							NULL);
+
+		desc = &wc->w_desc[wc->w_clen - 1];
+		if (ocfs2_should_zero_cluster(desc))
+			ocfs2_figure_cluster_boundaries(osb,
+							desc->c_cpos,
+							NULL,
+							&wc->w_target_to);
+	} else {
+		wc->w_target_from = 0;
+		wc->w_target_to = PAGE_CACHE_SIZE;
+	}
 }
 
 /*
- * Write a cluster to an inode. The cluster may not be allocated yet,
- * in which case it will be. This only exists for buffered writes -
- * O_DIRECT takes a more "traditional" path through the kernel.
- *
- * The caller is responsible for incrementing pos, written counts, etc
+ * Populate each single-cluster write descriptor in the write context
+ * with information about the i/o to be done.
  *
- * For file systems that don't support sparse files, pre-allocation
- * and page zeroing up until cpos should be done prior to this
- * function call.
- *
- * Callers should be holding i_sem, and the rw cluster lock.
- *
- * Returns the number of user bytes written, or less than zero for
- * error.
+ * Returns the number of clusters that will have to be allocated, as
+ * well as a worst case estimate of the number of extent records that
+ * would have to be created during a write to an unwritten region.
  */
-ssize_t ocfs2_buffered_write_cluster(struct file *file, loff_t pos,
-				     size_t count, ocfs2_page_writer *actor,
-				     void *priv)
+static int ocfs2_populate_write_desc(struct inode *inode,
+				     struct ocfs2_write_ctxt *wc,
+				     unsigned int *clusters_to_alloc,
+				     unsigned int *extents_to_split)
+{
+	int ret;
+	struct ocfs2_write_cluster_desc *desc;
+	unsigned int num_clusters = 0;
+	unsigned int ext_flags = 0;
+	u32 phys = 0;
+	int i;
+
+	*clusters_to_alloc = 0;
+	*extents_to_split = 0;
+
+	for (i = 0; i < wc->w_clen; i++) {
+		desc = &wc->w_desc[i];
+		desc->c_cpos = wc->w_cpos + i;
+
+		if (num_clusters == 0) {
+			/*
+			 * Need to look up the next extent record.
+			 */
+			ret = ocfs2_get_clusters(inode, desc->c_cpos, &phys,
+						 &num_clusters, &ext_flags);
+			if (ret) {
+				mlog_errno(ret);
+				goto out;
+			}
+
+			/*
+			 * Assume worst case - that we're writing in
+			 * the middle of the extent.
+			 *
+			 * We can assume that the write proceeds from
+			 * left to right, in which case the extent
+			 * insert code is smart enough to coalesce the
+			 * next splits into the previous records created.
+			 */
+			if (ext_flags & OCFS2_EXT_UNWRITTEN)
+				*extents_to_split = *extents_to_split + 2;
+		} else if (phys) {
+			/*
+			 * Only increment phys if it doesn't describe
+			 * a hole.
+			 */
+			phys++;
+		}
+
+		desc->c_phys = phys;
+		if (phys == 0) {
+			desc->c_new = 1;
+			*clusters_to_alloc = *clusters_to_alloc + 1;
+		}
+		if (ext_flags & OCFS2_EXT_UNWRITTEN)
+			desc->c_unwritten = 1;
+
+		num_clusters--;
+	}
+
+	ret = 0;
+out:
+	return ret;
+}
+
+int ocfs2_write_begin_nolock(struct address_space *mapping,
+			     loff_t pos, unsigned len, unsigned flags,
+			     struct page **pagep, void **fsdata,
+			     struct buffer_head *di_bh, struct page *mmap_page)
 {
 	int ret, credits = OCFS2_INODE_UPDATE_CREDITS;
-	ssize_t written = 0;
-	u32 phys;
-	struct inode *inode = file->f_mapping->host;
+	unsigned int clusters_to_alloc, extents_to_split;
+	struct ocfs2_write_ctxt *wc;
+	struct inode *inode = mapping->host;
 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
-	struct buffer_head *di_bh = NULL;
 	struct ocfs2_dinode *di;
 	struct ocfs2_alloc_context *data_ac = NULL;
 	struct ocfs2_alloc_context *meta_ac = NULL;
 	handle_t *handle;
-	struct ocfs2_write_ctxt wc;
-
-	ocfs2_write_ctxt_init(&wc, osb, pos, count, actor, priv);
 
-	ret = ocfs2_meta_lock(inode, &di_bh, 1);
+	ret = ocfs2_alloc_write_ctxt(&wc, osb, pos, len, di_bh);
 	if (ret) {
 		mlog_errno(ret);
-		goto out;
+		return ret;
 	}
-	di = (struct ocfs2_dinode *)di_bh->b_data;
-
-	/*
-	 * Take alloc sem here to prevent concurrent lookups. That way
-	 * the mapping, zeroing and tree manipulation within
-	 * ocfs2_write() will be safe against ->readpage(). This
-	 * should also serve to lock out allocation from a shared
-	 * writeable region.
-	 */
-	down_write(&OCFS2_I(inode)->ip_alloc_sem);
 
-	ret = ocfs2_get_clusters(inode, wc.w_cpos, &phys, NULL, NULL);
+	ret = ocfs2_populate_write_desc(inode, wc, &clusters_to_alloc,
+					&extents_to_split);
 	if (ret) {
 		mlog_errno(ret);
-		goto out_meta;
+		goto out;
 	}
 
-	/* phys == 0 means that allocation is required. */
-	if (phys == 0) {
-		ret = ocfs2_lock_allocators(inode, di, 1, &data_ac, &meta_ac);
+	di = (struct ocfs2_dinode *)wc->w_di_bh->b_data;
+
+	/*
+	 * We set w_target_from, w_target_to here so that
+	 * ocfs2_write_end() knows which range in the target page to
+	 * write out. An allocation requires that we write the entire
+	 * cluster range.
+	 */
+	if (clusters_to_alloc || extents_to_split) {
+		/*
+		 * XXX: We are stretching the limits of
+		 * ocfs2_lock_allocators(). It greatly over-estimates
+		 * the work to be done.
+		 */
+		ret = ocfs2_lock_allocators(inode, di, clusters_to_alloc,
+					    extents_to_split, &data_ac, &meta_ac);
 		if (ret) {
 			mlog_errno(ret);
-			goto out_meta;
+			goto out;
 		}
 
-		credits = ocfs2_calc_extend_credits(inode->i_sb, di, 1);
-	}
+		credits = ocfs2_calc_extend_credits(inode->i_sb, di,
+						    clusters_to_alloc);
 
-	ret = ocfs2_data_lock(inode, 1);
-	if (ret) {
-		mlog_errno(ret);
-		goto out_meta;
 	}
 
+	ocfs2_set_target_boundaries(osb, wc, pos, len,
+				    clusters_to_alloc + extents_to_split);
+
 	handle = ocfs2_start_trans(osb, credits);
 	if (IS_ERR(handle)) {
 		ret = PTR_ERR(handle);
 		mlog_errno(ret);
-		goto out_data;
+		goto out;
 	}
 
-	written = ocfs2_write(file, phys, handle, di_bh, data_ac,
-			      meta_ac, &wc);
-	if (written < 0) {
-		ret = written;
+	wc->w_handle = handle;
+
+	/*
+	 * We don't want this to fail in ocfs2_write_end(), so do it
+	 * here.
+	 */
+	ret = ocfs2_journal_access(handle, inode, wc->w_di_bh,
+				   OCFS2_JOURNAL_ACCESS_WRITE);
+	if (ret) {
 		mlog_errno(ret);
 		goto out_commit;
 	}
 
-	ret = ocfs2_journal_access(handle, inode, di_bh,
-				   OCFS2_JOURNAL_ACCESS_WRITE);
+	/*
+	 * Fill our page array first. That way we've grabbed enough so
+	 * that we can zero and flush if we error after adding the
+	 * extent.
+	 */
+	ret = ocfs2_grab_pages_for_write(mapping, wc, wc->w_cpos, pos,
+					 clusters_to_alloc + extents_to_split,
+					 mmap_page);
 	if (ret) {
 		mlog_errno(ret);
 		goto out_commit;
 	}
 
-	pos += written;
+	ret = ocfs2_write_cluster_by_desc(mapping, data_ac, meta_ac, wc, pos,
+					  len);
+	if (ret) {
+		mlog_errno(ret);
+		goto out_commit;
+	}
+
+	if (data_ac)
+		ocfs2_free_alloc_context(data_ac);
+	if (meta_ac)
+		ocfs2_free_alloc_context(meta_ac);
+
+	*pagep = wc->w_target_page;
+	*fsdata = wc;
+	return 0;
+out_commit:
+	ocfs2_commit_trans(osb, handle);
+
+out:
+	ocfs2_free_write_ctxt(wc);
+
+	if (data_ac)
+		ocfs2_free_alloc_context(data_ac);
+	if (meta_ac)
+		ocfs2_free_alloc_context(meta_ac);
+	return ret;
+}
+
+int ocfs2_write_begin(struct file *file, struct address_space *mapping,
+		      loff_t pos, unsigned len, unsigned flags,
+		      struct page **pagep, void **fsdata)
+{
+	int ret;
+	struct buffer_head *di_bh = NULL;
+	struct inode *inode = mapping->host;
+
+	ret = ocfs2_meta_lock(inode, &di_bh, 1);
+	if (ret) {
+		mlog_errno(ret);
+		return ret;
+	}
+
+	/*
+	 * Take alloc sem here to prevent concurrent lookups. That way
+	 * the mapping, zeroing and tree manipulation within
+	 * ocfs2_write() will be safe against ->readpage(). This
+	 * should also serve to lock out allocation from a shared
+	 * writeable region.
+	 */
+	down_write(&OCFS2_I(inode)->ip_alloc_sem);
+
+	ret = ocfs2_data_lock(inode, 1);
+	if (ret) {
+		mlog_errno(ret);
+		goto out_fail;
+	}
+
+	ret = ocfs2_write_begin_nolock(mapping, pos, len, flags, pagep,
+				       fsdata, di_bh, NULL);
+	if (ret) {
+		mlog_errno(ret);
+		goto out_fail_data;
+	}
+
+	brelse(di_bh);
+
+	return 0;
+
+out_fail_data:
+	ocfs2_data_unlock(inode, 1);
+out_fail:
+	up_write(&OCFS2_I(inode)->ip_alloc_sem);
+
+	brelse(di_bh);
+	ocfs2_meta_unlock(inode, 1);
+
+	return ret;
+}
+
+int ocfs2_write_end_nolock(struct address_space *mapping,
+			   loff_t pos, unsigned len, unsigned copied,
+			   struct page *page, void *fsdata)
+{
+	int i;
+	unsigned from, to, start = pos & (PAGE_CACHE_SIZE - 1);
+	struct inode *inode = mapping->host;
+	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+	struct ocfs2_write_ctxt *wc = fsdata;
+	struct ocfs2_dinode *di = (struct ocfs2_dinode *)wc->w_di_bh->b_data;
+	handle_t *handle = wc->w_handle;
+	struct page *tmppage;
+
+	if (unlikely(copied < len)) {
+		if (!PageUptodate(wc->w_target_page))
+			copied = 0;
+
+		ocfs2_zero_new_buffers(wc->w_target_page, start+copied,
+				       start+len);
+	}
+	flush_dcache_page(wc->w_target_page);
+
+	for(i = 0; i < wc->w_num_pages; i++) {
+		tmppage = wc->w_pages[i];
+
+		if (tmppage == wc->w_target_page) {
+			from = wc->w_target_from;
+			to = wc->w_target_to;
+
+			BUG_ON(from > PAGE_CACHE_SIZE ||
+			       to > PAGE_CACHE_SIZE ||
+			       to < from);
+		} else {
+			/*
+			 * Pages adjacent to the target (if any) imply
+			 * a hole-filling write in which case we want
+			 * to flush their entire range.
+			 */
+			from = 0;
+			to = PAGE_CACHE_SIZE;
+		}
+
+		if (ocfs2_should_order_data(inode))
+			walk_page_buffers(wc->w_handle, page_buffers(tmppage),
+					  from, to, NULL,
+					  ocfs2_journal_dirty_data);
+
+		block_commit_write(tmppage, from, to);
+	}
+
+	pos += copied;
 	if (pos > inode->i_size) {
 		i_size_write(inode, pos);
 		mark_inode_dirty(inode);
@@ -1283,29 +1582,31 @@ ssize_t ocfs2_buffered_write_cluster(struct file *file, loff_t pos,
 	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 	di->i_mtime = di->i_ctime = cpu_to_le64(inode->i_mtime.tv_sec);
 	di->i_mtime_nsec = di->i_ctime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
+	ocfs2_journal_dirty(handle, wc->w_di_bh);
 
-	ret = ocfs2_journal_dirty(handle, di_bh);
-	if (ret)
-		mlog_errno(ret);
-
-out_commit:
 	ocfs2_commit_trans(osb, handle);
 
-out_data:
-	ocfs2_data_unlock(inode, 1);
+	ocfs2_run_deallocs(osb, &wc->w_dealloc);
+
+	ocfs2_free_write_ctxt(wc);
+
+	return copied;
+}
+
+int ocfs2_write_end(struct file *file, struct address_space *mapping,
+		    loff_t pos, unsigned len, unsigned copied,
+		    struct page *page, void *fsdata)
+{
+	int ret;
+	struct inode *inode = mapping->host;
 
-out_meta:
+	ret = ocfs2_write_end_nolock(mapping, pos, len, copied, page, fsdata);
+
+	ocfs2_data_unlock(inode, 1);
 	up_write(&OCFS2_I(inode)->ip_alloc_sem);
 	ocfs2_meta_unlock(inode, 1);
 
-out:
-	brelse(di_bh);
-	if (data_ac)
-		ocfs2_free_alloc_context(data_ac);
-	if (meta_ac)
-		ocfs2_free_alloc_context(meta_ac);
-
-	return written ? written : ret;
+	return ret;
 }
 
 const struct address_space_operations ocfs2_aops = {
diff --git a/fs/ocfs2/aops.h b/fs/ocfs2/aops.h
index 45821d4..389579b 100644
--- a/fs/ocfs2/aops.h
+++ b/fs/ocfs2/aops.h
@@ -42,57 +42,22 @@ int walk_page_buffers(	handle_t *handle,
 			int (*fn)(	handle_t *handle,
 					struct buffer_head *bh));
 
-struct ocfs2_write_ctxt;
-typedef int (ocfs2_page_writer)(struct inode *, struct ocfs2_write_ctxt *,
-				u64 *, unsigned int *, unsigned int *);
+int ocfs2_write_begin(struct file *file, struct address_space *mapping,
+		      loff_t pos, unsigned len, unsigned flags,
+		      struct page **pagep, void **fsdata);
 
-ssize_t ocfs2_buffered_write_cluster(struct file *file, loff_t pos,
-				     size_t count, ocfs2_page_writer *actor,
-				     void *priv);
+int ocfs2_write_end(struct file *file, struct address_space *mapping,
+		    loff_t pos, unsigned len, unsigned copied,
+		    struct page *page, void *fsdata);
 
-struct ocfs2_write_ctxt {
-	size_t				w_count;
-	loff_t				w_pos;
-	u32				w_cpos;
-	unsigned int			w_finished_copy;
+int ocfs2_write_end_nolock(struct address_space *mapping,
+			   loff_t pos, unsigned len, unsigned copied,
+			   struct page *page, void *fsdata);
 
-	/* This is true if page_size > cluster_size */
-	unsigned int			w_large_pages;
-
-	/* Filler callback and private data */
-	ocfs2_page_writer		*w_write_data_page;
-	void				*w_private;
-
-	/* Only valid for the filler callback */
-	struct page			*w_this_page;
-	unsigned int			w_this_page_new;
-};
-
-struct ocfs2_buffered_write_priv {
-	char				*b_src_buf;
-	const struct iovec		*b_cur_iov; /* Current iovec */
-	size_t				b_cur_off; /* Offset in the
-						    * current iovec */
-};
-int ocfs2_map_and_write_user_data(struct inode *inode,
-				  struct ocfs2_write_ctxt *wc,
-				  u64 *p_blkno,
-				  unsigned int *ret_from,
-				  unsigned int *ret_to);
-
-struct ocfs2_splice_write_priv {
-	struct splice_desc		*s_sd;
-	struct pipe_buffer		*s_buf;
-	struct pipe_inode_info		*s_pipe;
-	/* Neither offset value is ever larger than one page */
-	unsigned int			s_offset;
-	unsigned int			s_buf_offset;
-};
-int ocfs2_map_and_write_splice_data(struct inode *inode,
-				    struct ocfs2_write_ctxt *wc,
-				    u64 *p_blkno,
-				    unsigned int *ret_from,
-				    unsigned int *ret_to);
+int ocfs2_write_begin_nolock(struct address_space *mapping,
+			     loff_t pos, unsigned len, unsigned flags,
+			     struct page **pagep, void **fsdata,
+			     struct buffer_head *di_bh, struct page *mmap_page);
 
 /* all ocfs2_dio_end_io()'s fault */
 #define ocfs2_iocb_is_rw_locked(iocb) \
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 9791134..2bd7f78 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -1335,6 +1335,7 @@ static ssize_t o2hb_region_dev_write(struct o2hb_region *reg,
 	ret = wait_event_interruptible(o2hb_steady_queue,
 				atomic_read(&reg->hr_steady_iterations) == 0);
 	if (ret) {
+		/* We got interrupted (hello ptrace!).  Clean up */
 		spin_lock(&o2hb_live_lock);
 		hb_task = reg->hr_task;
 		reg->hr_task = NULL;
@@ -1345,7 +1346,16 @@ static ssize_t o2hb_region_dev_write(struct o2hb_region *reg,
 		goto out;
 	}
 
-	ret = count;
+	/* Ok, we were woken.  Make sure it wasn't by drop_item() */
+	spin_lock(&o2hb_live_lock);
+	hb_task = reg->hr_task;
+	spin_unlock(&o2hb_live_lock);
+
+	if (hb_task)
+		ret = count;
+	else
+		ret = -EIO;
+
 out:
 	if (filp)
 		fput(filp);
@@ -1523,6 +1533,15 @@ static void o2hb_heartbeat_group_drop_item(struct config_group *group,
 	if (hb_task)
 		kthread_stop(hb_task);
 
+	/*
+	 * If we're racing a dev_write(), we need to wake them.  They will
+	 * check reg->hr_task
+	 */
+	if (atomic_read(&reg->hr_steady_iterations) != 0) {
+		atomic_set(&reg->hr_steady_iterations, 0);
+		wake_up(&o2hb_steady_queue);
+	}
+
 	config_item_put(item);
 }
 
@@ -1665,7 +1684,67 @@ void o2hb_setup_callback(struct o2hb_callback_func *hc,
 }
 EXPORT_SYMBOL_GPL(o2hb_setup_callback);
 
-int o2hb_register_callback(struct o2hb_callback_func *hc)
+static struct o2hb_region *o2hb_find_region(const char *region_uuid)
+{
+	struct o2hb_region *p, *reg = NULL;
+
+	assert_spin_locked(&o2hb_live_lock);
+
+	list_for_each_entry(p, &o2hb_all_regions, hr_all_item) {
+		if (!strcmp(region_uuid, config_item_name(&p->hr_item))) {
+			reg = p;
+			break;
+		}
+	}
+
+	return reg;
+}
+
+static int o2hb_region_get(const char *region_uuid)
+{
+	int ret = 0;
+	struct o2hb_region *reg;
+
+	spin_lock(&o2hb_live_lock);
+
+	reg = o2hb_find_region(region_uuid);
+	if (!reg)
+		ret = -ENOENT;
+	spin_unlock(&o2hb_live_lock);
+
+	if (ret)
+		goto out;
+
+	ret = o2nm_depend_this_node();
+	if (ret)
+		goto out;
+
+	ret = o2nm_depend_item(&reg->hr_item);
+	if (ret)
+		o2nm_undepend_this_node();
+
+out:
+	return ret;
+}
+
+static void o2hb_region_put(const char *region_uuid)
+{
+	struct o2hb_region *reg;
+
+	spin_lock(&o2hb_live_lock);
+
+	reg = o2hb_find_region(region_uuid);
+
+	spin_unlock(&o2hb_live_lock);
+
+	if (reg) {
+		o2nm_undepend_item(&reg->hr_item);
+		o2nm_undepend_this_node();
+	}
+}
+
+int o2hb_register_callback(const char *region_uuid,
+			   struct o2hb_callback_func *hc)
 {
 	struct o2hb_callback_func *tmp;
 	struct list_head *iter;
@@ -1681,6 +1760,12 @@ int o2hb_register_callback(struct o2hb_callback_func *hc)
 		goto out;
 	}
 
+	if (region_uuid) {
+		ret = o2hb_region_get(region_uuid);
+		if (ret)
+			goto out;
+	}
+
 	down_write(&o2hb_callback_sem);
 
 	list_for_each(iter, &hbcall->list) {
@@ -1702,16 +1787,21 @@ out:
 }
 EXPORT_SYMBOL_GPL(o2hb_register_callback);
 
-void o2hb_unregister_callback(struct o2hb_callback_func *hc)
+void o2hb_unregister_callback(const char *region_uuid,
+			      struct o2hb_callback_func *hc)
 {
 	BUG_ON(hc->hc_magic != O2HB_CB_MAGIC);
 
 	mlog(ML_HEARTBEAT, "on behalf of %p for funcs %p\n",
 	     __builtin_return_address(0), hc);
 
+	/* XXX Can this happen _with_ a region reference? */
 	if (list_empty(&hc->hc_item))
 		return;
 
+	if (region_uuid)
+		o2hb_region_put(region_uuid);
+
 	down_write(&o2hb_callback_sem);
 
 	list_del_init(&hc->hc_item);
diff --git a/fs/ocfs2/cluster/heartbeat.h b/fs/ocfs2/cluster/heartbeat.h
index cc6d40b..35397dd 100644
--- a/fs/ocfs2/cluster/heartbeat.h
+++ b/fs/ocfs2/cluster/heartbeat.h
@@ -69,8 +69,10 @@ void o2hb_setup_callback(struct o2hb_callback_func *hc,
 			 o2hb_cb_func *func,
 			 void *data,
 			 int priority);
-int o2hb_register_callback(struct o2hb_callback_func *hc);
-void o2hb_unregister_callback(struct o2hb_callback_func *hc);
+int o2hb_register_callback(const char *region_uuid,
+			   struct o2hb_callback_func *hc);
+void o2hb_unregister_callback(const char *region_uuid,
+			      struct o2hb_callback_func *hc);
 void o2hb_fill_node_map(unsigned long *map,
 			unsigned bytes);
 void o2hb_init(void);
diff --git a/fs/ocfs2/cluster/masklog.c b/fs/ocfs2/cluster/masklog.c
index 2b205f5..e9e042b 100644
--- a/fs/ocfs2/cluster/masklog.c
+++ b/fs/ocfs2/cluster/masklog.c
@@ -74,7 +74,6 @@ struct mlog_attribute {
 #define define_mask(_name) {			\
 	.attr = {				\
 		.name = #_name,			\
-		.owner = THIS_MODULE,		\
 		.mode = S_IRUGO | S_IWUSR,	\
 	},					\
 	.mask = ML_##_name,			\
diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c
index 9f5ad0f..af2070d 100644
--- a/fs/ocfs2/cluster/nodemanager.c
+++ b/fs/ocfs2/cluster/nodemanager.c
@@ -900,6 +900,46 @@ static struct o2nm_cluster_group o2nm_cluster_group = {
 	},
 };
 
+int o2nm_depend_item(struct config_item *item)
+{
+	return configfs_depend_item(&o2nm_cluster_group.cs_subsys, item);
+}
+
+void o2nm_undepend_item(struct config_item *item)
+{
+	configfs_undepend_item(&o2nm_cluster_group.cs_subsys, item);
+}
+
+int o2nm_depend_this_node(void)
+{
+	int ret = 0;
+	struct o2nm_node *local_node;
+
+	local_node = o2nm_get_node_by_num(o2nm_this_node());
+	if (!local_node) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	ret = o2nm_depend_item(&local_node->nd_item);
+	o2nm_node_put(local_node);
+
+out:
+	return ret;
+}
+
+void o2nm_undepend_this_node(void)
+{
+	struct o2nm_node *local_node;
+
+	local_node = o2nm_get_node_by_num(o2nm_this_node());
+	BUG_ON(!local_node);
+
+	o2nm_undepend_item(&local_node->nd_item);
+	o2nm_node_put(local_node);
+}
+
+
 static void __exit exit_o2nm(void)
 {
 	if (ocfs2_table_header)
@@ -934,7 +974,7 @@ static int __init init_o2nm(void)
 		goto out_sysctl;
 
 	config_group_init(&o2nm_cluster_group.cs_subsys.su_group);
-	init_MUTEX(&o2nm_cluster_group.cs_subsys.su_sem);
+	mutex_init(&o2nm_cluster_group.cs_subsys.su_mutex);
 	ret = configfs_register_subsystem(&o2nm_cluster_group.cs_subsys);
 	if (ret) {
 		printk(KERN_ERR "nodemanager: Registration returned %d\n", ret);
diff --git a/fs/ocfs2/cluster/nodemanager.h b/fs/ocfs2/cluster/nodemanager.h
index 0705221..7c86036 100644
--- a/fs/ocfs2/cluster/nodemanager.h
+++ b/fs/ocfs2/cluster/nodemanager.h
@@ -77,4 +77,9 @@ struct o2nm_node *o2nm_get_node_by_ip(__be32 addr);
 void o2nm_node_get(struct o2nm_node *node);
 void o2nm_node_put(struct o2nm_node *node);
 
+int o2nm_depend_item(struct config_item *item);
+void o2nm_undepend_item(struct config_item *item);
+int o2nm_depend_this_node(void);
+void o2nm_undepend_this_node(void);
+
 #endif /* O2CLUSTER_NODEMANAGER_H */
diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c
index 0b229a9..f0bdfd9 100644
--- a/fs/ocfs2/cluster/tcp.c
+++ b/fs/ocfs2/cluster/tcp.c
@@ -261,14 +261,12 @@ out:
 
 static void o2net_complete_nodes_nsw(struct o2net_node *nn)
 {
-	struct list_head *iter, *tmp;
+	struct o2net_status_wait *nsw, *tmp;
 	unsigned int num_kills = 0;
-	struct o2net_status_wait *nsw;
 
 	assert_spin_locked(&nn->nn_lock);
 
-	list_for_each_safe(iter, tmp, &nn->nn_status_list) {
-		nsw = list_entry(iter, struct o2net_status_wait, ns_node_item);
+	list_for_each_entry_safe(nsw, tmp, &nn->nn_status_list, ns_node_item) {
 		o2net_complete_nsw_locked(nn, nsw, O2NET_ERR_DIED, 0);
 		num_kills++;
 	}
@@ -764,13 +762,10 @@ EXPORT_SYMBOL_GPL(o2net_register_handler);
 
 void o2net_unregister_handler_list(struct list_head *list)
 {
-	struct list_head *pos, *n;
-	struct o2net_msg_handler *nmh;
+	struct o2net_msg_handler *nmh, *n;
 
 	write_lock(&o2net_handler_lock);
-	list_for_each_safe(pos, n, list) {
-		nmh = list_entry(pos, struct o2net_msg_handler,
-				 nh_unregister_item);
+	list_for_each_entry_safe(nmh, n, list, nh_unregister_item) {
 		mlog(ML_TCP, "unregistering handler func %p type %u key %08x\n",
 		     nmh->nh_func, nmh->nh_msg_type, nmh->nh_key);
 		rb_erase(&nmh->nh_node, &o2net_handler_tree);
@@ -1638,8 +1633,8 @@ static void o2net_hb_node_up_cb(struct o2nm_node *node, int node_num,
 
 void o2net_unregister_hb_callbacks(void)
 {
-	o2hb_unregister_callback(&o2net_hb_up);
-	o2hb_unregister_callback(&o2net_hb_down);
+	o2hb_unregister_callback(NULL, &o2net_hb_up);
+	o2hb_unregister_callback(NULL, &o2net_hb_down);
 }
 
 int o2net_register_hb_callbacks(void)
@@ -1651,9 +1646,9 @@ int o2net_register_hb_callbacks(void)
 	o2hb_setup_callback(&o2net_hb_up, O2HB_NODE_UP_CB,
 			    o2net_hb_node_up_cb, NULL, O2NET_HB_PRI);
 
-	ret = o2hb_register_callback(&o2net_hb_up);
+	ret = o2hb_register_callback(NULL, &o2net_hb_up);
 	if (ret == 0)
-		ret = o2hb_register_callback(&o2net_hb_down);
+		ret = o2hb_register_callback(NULL, &o2net_hb_down);
 
 	if (ret)
 		o2net_unregister_hb_callbacks();
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index c441ef1..0d5fdde 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -368,7 +368,7 @@ int ocfs2_do_extend_dir(struct super_block *sb,
 		u32 offset = OCFS2_I(dir)->ip_clusters;
 
 		status = ocfs2_do_extend_allocation(OCFS2_SB(sb), dir, &offset,
-						    1, parent_fe_bh, handle,
+						    1, 0, parent_fe_bh, handle,
 						    data_ac, meta_ac, NULL);
 		BUG_ON(status == -EAGAIN);
 		if (status < 0) {
diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index d836b98..6954565 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -1128,8 +1128,8 @@ bail:
 
 static void dlm_unregister_domain_handlers(struct dlm_ctxt *dlm)
 {
-	o2hb_unregister_callback(&dlm->dlm_hb_up);
-	o2hb_unregister_callback(&dlm->dlm_hb_down);
+	o2hb_unregister_callback(NULL, &dlm->dlm_hb_up);
+	o2hb_unregister_callback(NULL, &dlm->dlm_hb_down);
 	o2net_unregister_handler_list(&dlm->dlm_domain_handlers);
 }
 
@@ -1141,13 +1141,13 @@ static int dlm_register_domain_handlers(struct dlm_ctxt *dlm)
 
 	o2hb_setup_callback(&dlm->dlm_hb_down, O2HB_NODE_DOWN_CB,
 			    dlm_hb_node_down_cb, dlm, DLM_HB_NODE_DOWN_PRI);
-	status = o2hb_register_callback(&dlm->dlm_hb_down);
+	status = o2hb_register_callback(NULL, &dlm->dlm_hb_down);
 	if (status)
 		goto bail;
 
 	o2hb_setup_callback(&dlm->dlm_hb_up, O2HB_NODE_UP_CB,
 			    dlm_hb_node_up_cb, dlm, DLM_HB_NODE_UP_PRI);
-	status = o2hb_register_callback(&dlm->dlm_hb_up);
+	status = o2hb_register_callback(NULL, &dlm->dlm_hb_up);
 	if (status)
 		goto bail;
 
diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index 6edffca..65b2b9b 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -192,25 +192,20 @@ static void dlm_print_one_mle(struct dlm_master_list_entry *mle)
 static void dlm_dump_mles(struct dlm_ctxt *dlm)
 {
 	struct dlm_master_list_entry *mle;
-	struct list_head *iter;
 	
 	mlog(ML_NOTICE, "dumping all mles for domain %s:\n", dlm->name);
 	spin_lock(&dlm->master_lock);
-	list_for_each(iter, &dlm->master_list) {
-		mle = list_entry(iter, struct dlm_master_list_entry, list);
+	list_for_each_entry(mle, &dlm->master_list, list)
 		dlm_print_one_mle(mle);
-	}
 	spin_unlock(&dlm->master_lock);
 }
 
 int dlm_dump_all_mles(const char __user *data, unsigned int len)
 {
-	struct list_head *iter;
 	struct dlm_ctxt *dlm;
 
 	spin_lock(&dlm_domain_lock);
-	list_for_each(iter, &dlm_domains) {
-		dlm = list_entry (iter, struct dlm_ctxt, list);
+	list_for_each_entry(dlm, &dlm_domains, list) {
 		mlog(ML_NOTICE, "found dlm: %p, name=%s\n", dlm, dlm->name);
 		dlm_dump_mles(dlm);
 	}
@@ -454,12 +449,10 @@ static int dlm_find_mle(struct dlm_ctxt *dlm,
 			char *name, unsigned int namelen)
 {
 	struct dlm_master_list_entry *tmpmle;
-	struct list_head *iter;
 
 	assert_spin_locked(&dlm->master_lock);
 
-	list_for_each(iter, &dlm->master_list) {
-		tmpmle = list_entry(iter, struct dlm_master_list_entry, list);
+	list_for_each_entry(tmpmle, &dlm->master_list, list) {
 		if (!dlm_mle_equal(dlm, tmpmle, name, namelen))
 			continue;
 		dlm_get_mle(tmpmle);
@@ -472,13 +465,10 @@ static int dlm_find_mle(struct dlm_ctxt *dlm,
 void dlm_hb_event_notify_attached(struct dlm_ctxt *dlm, int idx, int node_up)
 {
 	struct dlm_master_list_entry *mle;
-	struct list_head *iter;
 
 	assert_spin_locked(&dlm->spinlock);
 	
-	list_for_each(iter, &dlm->mle_hb_events) {
-		mle = list_entry(iter, struct dlm_master_list_entry, 
-				 hb_events);
+	list_for_each_entry(mle, &dlm->mle_hb_events, hb_events) {
 		if (node_up)
 			dlm_mle_node_up(dlm, mle, NULL, idx);
 		else
@@ -2434,7 +2424,7 @@ static int dlm_is_lockres_migrateable(struct dlm_ctxt *dlm,
 	int ret;
 	int i;
 	int count = 0;
-	struct list_head *queue, *iter;
+	struct list_head *queue;
 	struct dlm_lock *lock;
 
 	assert_spin_locked(&res->spinlock);
@@ -2453,8 +2443,7 @@ static int dlm_is_lockres_migrateable(struct dlm_ctxt *dlm,
 	ret = 0;
 	queue = &res->granted;
 	for (i = 0; i < 3; i++) {
-		list_for_each(iter, queue) {
-			lock = list_entry(iter, struct dlm_lock, list);
+		list_for_each_entry(lock, queue, list) {
 			++count;
 			if (lock->ml.node == dlm->node_num) {
 				mlog(0, "found a lock owned by this node still "
@@ -2923,18 +2912,16 @@ again:
 static void dlm_remove_nonlocal_locks(struct dlm_ctxt *dlm,
 				      struct dlm_lock_resource *res)
 {
-	struct list_head *iter, *iter2;
 	struct list_head *queue = &res->granted;
 	int i, bit;
-	struct dlm_lock *lock;
+	struct dlm_lock *lock, *next;
 
 	assert_spin_locked(&res->spinlock);
 
 	BUG_ON(res->owner == dlm->node_num);
 
 	for (i=0; i<3; i++) {
-		list_for_each_safe(iter, iter2, queue) {
-			lock = list_entry (iter, struct dlm_lock, list);
+		list_for_each_entry_safe(lock, next, queue, list) {
 			if (lock->ml.node != dlm->node_num) {
 				mlog(0, "putting lock for node %u\n",
 				     lock->ml.node);
@@ -2976,7 +2963,6 @@ static u8 dlm_pick_migration_target(struct dlm_ctxt *dlm,
 {
 	int i;
 	struct list_head *queue = &res->granted;
-	struct list_head *iter;
 	struct dlm_lock *lock;
 	int nodenum;
 
@@ -2984,10 +2970,9 @@ static u8 dlm_pick_migration_target(struct dlm_ctxt *dlm,
 
 	spin_lock(&res->spinlock);
 	for (i=0; i<3; i++) {
-		list_for_each(iter, queue) {
+		list_for_each_entry(lock, queue, list) {
 			/* up to the caller to make sure this node
 			 * is alive */
-			lock = list_entry (iter, struct dlm_lock, list);
 			if (lock->ml.node != dlm->node_num) {
 				spin_unlock(&res->spinlock);
 				return lock->ml.node;
@@ -3234,8 +3219,7 @@ static int dlm_add_migration_mle(struct dlm_ctxt *dlm,
 
 void dlm_clean_master_list(struct dlm_ctxt *dlm, u8 dead_node)
 {
-	struct list_head *iter, *iter2;
-	struct dlm_master_list_entry *mle;
+	struct dlm_master_list_entry *mle, *next;
 	struct dlm_lock_resource *res;
 	unsigned int hash;
 
@@ -3245,9 +3229,7 @@ top:
 
 	/* clean the master list */
 	spin_lock(&dlm->master_lock);
-	list_for_each_safe(iter, iter2, &dlm->master_list) {
-		mle = list_entry(iter, struct dlm_master_list_entry, list);
-
+	list_for_each_entry_safe(mle, next, &dlm->master_list, list) {
 		BUG_ON(mle->type != DLM_MLE_BLOCK &&
 		       mle->type != DLM_MLE_MASTER &&
 		       mle->type != DLM_MLE_MIGRATION);
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index 671c4ed..a2c3316 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -158,8 +158,7 @@ void dlm_dispatch_work(struct work_struct *work)
 	struct dlm_ctxt *dlm =
 		container_of(work, struct dlm_ctxt, dispatched_work);
 	LIST_HEAD(tmp_list);
-	struct list_head *iter, *iter2;
-	struct dlm_work_item *item;
+	struct dlm_work_item *item, *next;
 	dlm_workfunc_t *workfunc;
 	int tot=0;
 
@@ -167,13 +166,12 @@ void dlm_dispatch_work(struct work_struct *work)
 	list_splice_init(&dlm->work_list, &tmp_list);
 	spin_unlock(&dlm->work_lock);
 
-	list_for_each_safe(iter, iter2, &tmp_list) {
+	list_for_each_entry(item, &tmp_list, list) {
 		tot++;
 	}
 	mlog(0, "%s: work thread has %d work items\n", dlm->name, tot);
 
-	list_for_each_safe(iter, iter2, &tmp_list) {
-		item = list_entry(iter, struct dlm_work_item, list);
+	list_for_each_entry_safe(item, next, &tmp_list, list) {
 		workfunc = item->func;
 		list_del_init(&item->list);
 
@@ -549,7 +547,6 @@ static int dlm_remaster_locks(struct dlm_ctxt *dlm, u8 dead_node)
 {
 	int status = 0;
 	struct dlm_reco_node_data *ndata;
-	struct list_head *iter;
 	int all_nodes_done;
 	int destroy = 0;
 	int pass = 0;
@@ -567,8 +564,7 @@ static int dlm_remaster_locks(struct dlm_ctxt *dlm, u8 dead_node)
 
 	/* safe to access the node data list without a lock, since this
 	 * process is the only one to change the list */
-	list_for_each(iter, &dlm->reco.node_data) {
-		ndata = list_entry (iter, struct dlm_reco_node_data, list);
+	list_for_each_entry(ndata, &dlm->reco.node_data, list) {
 		BUG_ON(ndata->state != DLM_RECO_NODE_DATA_INIT);
 		ndata->state = DLM_RECO_NODE_DATA_REQUESTING;
 
@@ -655,9 +651,7 @@ static int dlm_remaster_locks(struct dlm_ctxt *dlm, u8 dead_node)
 		 * done, or if anyone died */
 		all_nodes_done = 1;
 		spin_lock(&dlm_reco_state_lock);
-		list_for_each(iter, &dlm->reco.node_data) {
-			ndata = list_entry (iter, struct dlm_reco_node_data, list);
-
+		list_for_each_entry(ndata, &dlm->reco.node_data, list) {
 			mlog(0, "checking recovery state of node %u\n",
 			     ndata->node_num);
 			switch (ndata->state) {
@@ -774,16 +768,14 @@ static int dlm_init_recovery_area(struct dlm_ctxt *dlm, u8 dead_node)
 
 static void dlm_destroy_recovery_area(struct dlm_ctxt *dlm, u8 dead_node)
 {
-	struct list_head *iter, *iter2;
-	struct dlm_reco_node_data *ndata;
+	struct dlm_reco_node_data *ndata, *next;
 	LIST_HEAD(tmplist);
 
 	spin_lock(&dlm_reco_state_lock);
 	list_splice_init(&dlm->reco.node_data, &tmplist);
 	spin_unlock(&dlm_reco_state_lock);
 
-	list_for_each_safe(iter, iter2, &tmplist) {
-		ndata = list_entry (iter, struct dlm_reco_node_data, list);
+	list_for_each_entry_safe(ndata, next, &tmplist, list) {
 		list_del_init(&ndata->list);
 		kfree(ndata);
 	}
@@ -876,7 +868,6 @@ static void dlm_request_all_locks_worker(struct dlm_work_item *item, void *data)
 	struct dlm_lock_resource *res;
 	struct dlm_ctxt *dlm;
 	LIST_HEAD(resources);
-	struct list_head *iter;
 	int ret;
 	u8 dead_node, reco_master;
 	int skip_all_done = 0;
@@ -920,8 +911,7 @@ static void dlm_request_all_locks_worker(struct dlm_work_item *item, void *data)
 
 	/* any errors returned will be due to the new_master dying,
 	 * the dlm_reco_thread should detect this */
-	list_for_each(iter, &resources) {
-		res = list_entry (iter, struct dlm_lock_resource, recovering);
+	list_for_each_entry(res, &resources, recovering) {
 		ret = dlm_send_one_lockres(dlm, res, mres, reco_master,
 				   	DLM_MRES_RECOVERY);
 		if (ret < 0) {
@@ -983,7 +973,6 @@ int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data,
 {
 	struct dlm_ctxt *dlm = data;
 	struct dlm_reco_data_done *done = (struct dlm_reco_data_done *)msg->buf;
-	struct list_head *iter;
 	struct dlm_reco_node_data *ndata = NULL;
 	int ret = -EINVAL;
 
@@ -1000,8 +989,7 @@ int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data,
 			dlm->reco.dead_node, done->node_idx, dlm->node_num);
 
 	spin_lock(&dlm_reco_state_lock);
-	list_for_each(iter, &dlm->reco.node_data) {
-		ndata = list_entry (iter, struct dlm_reco_node_data, list);
+	list_for_each_entry(ndata, &dlm->reco.node_data, list) {
 		if (ndata->node_num != done->node_idx)
 			continue;
 
@@ -1049,13 +1037,11 @@ static void dlm_move_reco_locks_to_list(struct dlm_ctxt *dlm,
 					struct list_head *list,
 				       	u8 dead_node)
 {
-	struct dlm_lock_resource *res;
-	struct list_head *iter, *iter2;
+	struct dlm_lock_resource *res, *next;
 	struct dlm_lock *lock;
 
 	spin_lock(&dlm->spinlock);
-	list_for_each_safe(iter, iter2, &dlm->reco.resources) {
-		res = list_entry (iter, struct dlm_lock_resource, recovering);
+	list_for_each_entry_safe(res, next, &dlm->reco.resources, recovering) {
 		/* always prune any $RECOVERY entries for dead nodes,
 		 * otherwise hangs can occur during later recovery */
 		if (dlm_is_recovery_lock(res->lockname.name,
@@ -1169,7 +1155,7 @@ static void dlm_init_migratable_lockres(struct dlm_migratable_lockres *mres,
 					u8 flags, u8 master)
 {
 	/* mres here is one full page */
-	memset(mres, 0, PAGE_SIZE);
+	clear_page(mres);
 	mres->lockname_len = namelen;
 	memcpy(mres->lockname, lockname, namelen);
 	mres->num_locks = 0;
@@ -1252,7 +1238,7 @@ int dlm_send_one_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
 			 struct dlm_migratable_lockres *mres,
 			 u8 send_to, u8 flags)
 {
-	struct list_head *queue, *iter;
+	struct list_head *queue;
 	int total_locks, i;
 	u64 mig_cookie = 0;
 	struct dlm_lock *lock;
@@ -1278,9 +1264,7 @@ int dlm_send_one_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
 	total_locks = 0;
 	for (i=DLM_GRANTED_LIST; i<=DLM_BLOCKED_LIST; i++) {
 		queue = dlm_list_idx_to_ptr(res, i);
-		list_for_each(iter, queue) {
-			lock = list_entry (iter, struct dlm_lock, list);
-
+		list_for_each_entry(lock, queue, list) {
 			/* add another lock. */
 			total_locks++;
 			if (!dlm_add_lock_to_array(lock, mres, i))
@@ -1717,7 +1701,6 @@ static int dlm_process_recovery_data(struct dlm_ctxt *dlm,
 	struct dlm_lockstatus *lksb = NULL;
 	int ret = 0;
 	int i, j, bad;
-	struct list_head *iter;
 	struct dlm_lock *lock = NULL;
 	u8 from = O2NM_MAX_NODES;
 	unsigned int added = 0;
@@ -1755,8 +1738,7 @@ static int dlm_process_recovery_data(struct dlm_ctxt *dlm,
 			spin_lock(&res->spinlock);
 			for (j = DLM_GRANTED_LIST; j <= DLM_BLOCKED_LIST; j++) {
 				tmpq = dlm_list_idx_to_ptr(res, j);
-				list_for_each(iter, tmpq) {
-					lock = list_entry (iter, struct dlm_lock, list);
+				list_for_each_entry(lock, tmpq, list) {
 					if (lock->ml.cookie != ml->cookie)
 						lock = NULL;
 					else
@@ -1930,8 +1912,8 @@ void dlm_move_lockres_to_recovery_list(struct dlm_ctxt *dlm,
 				       struct dlm_lock_resource *res)
 {
 	int i;
-	struct list_head *queue, *iter, *iter2;
-	struct dlm_lock *lock;
+	struct list_head *queue;
+	struct dlm_lock *lock, *next;
 
 	res->state |= DLM_LOCK_RES_RECOVERING;
 	if (!list_empty(&res->recovering)) {
@@ -1947,8 +1929,7 @@ void dlm_move_lockres_to_recovery_list(struct dlm_ctxt *dlm,
 	/* find any pending locks and put them back on proper list */
 	for (i=DLM_BLOCKED_LIST; i>=DLM_GRANTED_LIST; i--) {
 		queue = dlm_list_idx_to_ptr(res, i);
-		list_for_each_safe(iter, iter2, queue) {
-			lock = list_entry (iter, struct dlm_lock, list);
+		list_for_each_entry_safe(lock, next, queue, list) {
 			dlm_lock_get(lock);
 			if (lock->convert_pending) {
 				/* move converting lock back to granted */
@@ -2013,18 +1994,15 @@ static void dlm_finish_local_lockres_recovery(struct dlm_ctxt *dlm,
 					      u8 dead_node, u8 new_master)
 {
 	int i;
-	struct list_head *iter, *iter2;
 	struct hlist_node *hash_iter;
 	struct hlist_head *bucket;
-
-	struct dlm_lock_resource *res;
+	struct dlm_lock_resource *res, *next;
 
 	mlog_entry_void();
 
 	assert_spin_locked(&dlm->spinlock);
 
-	list_for_each_safe(iter, iter2, &dlm->reco.resources) {
-		res = list_entry (iter, struct dlm_lock_resource, recovering);
+	list_for_each_entry_safe(res, next, &dlm->reco.resources, recovering) {
 		if (res->owner == dead_node) {
 			list_del_init(&res->recovering);
 			spin_lock(&res->spinlock);
@@ -2099,7 +2077,7 @@ static inline int dlm_lvb_needs_invalidation(struct dlm_lock *lock, int local)
 static void dlm_revalidate_lvb(struct dlm_ctxt *dlm,
 			       struct dlm_lock_resource *res, u8 dead_node)
 {
-	struct list_head *iter, *queue;
+	struct list_head *queue;
 	struct dlm_lock *lock;
 	int blank_lvb = 0, local = 0;
 	int i;
@@ -2121,8 +2099,7 @@ static void dlm_revalidate_lvb(struct dlm_ctxt *dlm,
 
 	for (i=DLM_GRANTED_LIST; i<=DLM_CONVERTING_LIST; i++) {
 		queue = dlm_list_idx_to_ptr(res, i);
-		list_for_each(iter, queue) {
-			lock = list_entry (iter, struct dlm_lock, list);
+		list_for_each_entry(lock, queue, list) {
 			if (lock->ml.node == search_node) {
 				if (dlm_lvb_needs_invalidation(lock, local)) {
 					/* zero the lksb lvb and lockres lvb */
@@ -2143,8 +2120,7 @@ static void dlm_revalidate_lvb(struct dlm_ctxt *dlm,
 static void dlm_free_dead_locks(struct dlm_ctxt *dlm,
 				struct dlm_lock_resource *res, u8 dead_node)
 {
-	struct list_head *iter, *tmpiter;
-	struct dlm_lock *lock;
+	struct dlm_lock *lock, *next;
 	unsigned int freed = 0;
 
 	/* this node is the lockres master:
@@ -2155,24 +2131,21 @@ static void dlm_free_dead_locks(struct dlm_ctxt *dlm,
 	assert_spin_locked(&res->spinlock);
 
 	/* TODO: check pending_asts, pending_basts here */
-	list_for_each_safe(iter, tmpiter, &res->granted) {
-		lock = list_entry (iter, struct dlm_lock, list);
+	list_for_each_entry_safe(lock, next, &res->granted, list) {
 		if (lock->ml.node == dead_node) {
 			list_del_init(&lock->list);
 			dlm_lock_put(lock);
 			freed++;
 		}
 	}
-	list_for_each_safe(iter, tmpiter, &res->converting) {
-		lock = list_entry (iter, struct dlm_lock, list);
+	list_for_each_entry_safe(lock, next, &res->converting, list) {
 		if (lock->ml.node == dead_node) {
 			list_del_init(&lock->list);
 			dlm_lock_put(lock);
 			freed++;
 		}
 	}
-	list_for_each_safe(iter, tmpiter, &res->blocked) {
-		lock = list_entry (iter, struct dlm_lock, list);
+	list_for_each_entry_safe(lock, next, &res->blocked, list) {
 		if (lock->ml.node == dead_node) {
 			list_del_init(&lock->list);
 			dlm_lock_put(lock);
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index d1bd305..f71250e 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -600,15 +600,13 @@ static inline int ocfs2_highest_compat_lock_level(int level)
 static void lockres_set_flags(struct ocfs2_lock_res *lockres,
 			      unsigned long newflags)
 {
-	struct list_head *pos, *tmp;
-	struct ocfs2_mask_waiter *mw;
+	struct ocfs2_mask_waiter *mw, *tmp;
 
  	assert_spin_locked(&lockres->l_lock);
 
 	lockres->l_flags = newflags;
 
-	list_for_each_safe(pos, tmp, &lockres->l_mask_waiters) {
-		mw = list_entry(pos, struct ocfs2_mask_waiter, mw_item);
+	list_for_each_entry_safe(mw, tmp, &lockres->l_mask_waiters, mw_item) {
 		if ((lockres->l_flags & mw->mw_mask) != mw->mw_goal)
 			continue;
 
diff --git a/fs/ocfs2/endian.h b/fs/ocfs2/endian.h
index f226b22..ff25762 100644
--- a/fs/ocfs2/endian.h
+++ b/fs/ocfs2/endian.h
@@ -32,6 +32,11 @@ static inline void le32_add_cpu(__le32 *var, u32 val)
 	*var = cpu_to_le32(le32_to_cpu(*var) + val);
 }
 
+static inline void le64_add_cpu(__le64 *var, u64 val)
+{
+	*var = cpu_to_le64(le64_to_cpu(*var) + val);
+}
+
 static inline void le32_and_cpu(__le32 *var, u32 val)
 {
 	*var = cpu_to_le32(le32_to_cpu(*var) & val);
diff --git a/fs/ocfs2/export.h b/fs/ocfs2/export.h
index 5b77ee7..e08bed9 100644
--- a/fs/ocfs2/export.h
+++ b/fs/ocfs2/export.h
@@ -26,6 +26,8 @@
 #ifndef OCFS2_EXPORT_H
 #define OCFS2_EXPORT_H
 
+#include <linux/exportfs.h>
+
 extern struct export_operations ocfs2_export_ops;
 
 #endif /* OCFS2_EXPORT_H */
diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c
index ba2b2ab..03c1d365 100644
--- a/fs/ocfs2/extent_map.c
+++ b/fs/ocfs2/extent_map.c
@@ -109,17 +109,14 @@ static int ocfs2_extent_map_lookup(struct inode *inode, unsigned int cpos,
  */
 void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cpos)
 {
-	struct list_head *p, *n;
-	struct ocfs2_extent_map_item *emi;
+	struct ocfs2_extent_map_item *emi, *n;
 	struct ocfs2_inode_info *oi = OCFS2_I(inode);
 	struct ocfs2_extent_map *em = &oi->ip_extent_map;
 	LIST_HEAD(tmp_list);
 	unsigned int range;
 
 	spin_lock(&oi->ip_lock);
-	list_for_each_safe(p, n, &em->em_list) {
-		emi = list_entry(p, struct ocfs2_extent_map_item, ei_list);
-
+	list_for_each_entry_safe(emi, n, &em->em_list, ei_list) {
 		if (emi->ei_cpos >= cpos) {
 			/* Full truncate of this record. */
 			list_move(&emi->ei_list, &tmp_list);
@@ -136,8 +133,7 @@ void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cpos)
 	}
 	spin_unlock(&oi->ip_lock);
 
-	list_for_each_safe(p, n, &tmp_list) {
-		emi = list_entry(p, struct ocfs2_extent_map_item, ei_list);
+	list_for_each_entry_safe(emi, n, &tmp_list, ei_list) {
 		list_del(&emi->ei_list);
 		kfree(emi);
 	}
@@ -377,37 +373,6 @@ out:
 	return ret;
 }
 
-/*
- * Return the index of the extent record which contains cluster #v_cluster.
- * -1 is returned if it was not found.
- *
- * Should work fine on interior and exterior nodes.
- */
-static int ocfs2_search_extent_list(struct ocfs2_extent_list *el,
-				    u32 v_cluster)
-{
-	int ret = -1;
-	int i;
-	struct ocfs2_extent_rec *rec;
-	u32 rec_end, rec_start, clusters;
-
-	for(i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) {
-		rec = &el->l_recs[i];
-
-		rec_start = le32_to_cpu(rec->e_cpos);
-		clusters = ocfs2_rec_clusters(el, rec);
-
-		rec_end = rec_start + clusters;
-
-		if (v_cluster >= rec_start && v_cluster < rec_end) {
-			ret = i;
-			break;
-		}
-	}
-
-	return ret;
-}
-
 int ocfs2_get_clusters(struct inode *inode, u32 v_cluster,
 		       u32 *p_cluster, u32 *num_clusters,
 		       unsigned int *extent_flags)
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index ac6c964..004c2abb 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -31,7 +31,7 @@
 #include <linux/pagemap.h>
 #include <linux/uio.h>
 #include <linux/sched.h>
-#include <linux/pipe_fs_i.h>
+#include <linux/splice.h>
 #include <linux/mount.h>
 #include <linux/writeback.h>
 
@@ -263,6 +263,7 @@ static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb,
 	int status;
 	handle_t *handle;
 	struct ocfs2_dinode *di;
+	u64 cluster_bytes;
 
 	mlog_entry_void();
 
@@ -286,7 +287,9 @@ static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb,
 	/*
 	 * Do this before setting i_size.
 	 */
-	status = ocfs2_zero_tail_for_truncate(inode, handle, new_i_size);
+	cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
+	status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size,
+					       cluster_bytes);
 	if (status) {
 		mlog_errno(status);
 		goto out_commit;
@@ -326,9 +329,6 @@ static int ocfs2_truncate_file(struct inode *inode,
 		   (unsigned long long)OCFS2_I(inode)->ip_blkno,
 		   (unsigned long long)new_i_size);
 
-	unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
-	truncate_inode_pages(inode->i_mapping, new_i_size);
-
 	fe = (struct ocfs2_dinode *) di_bh->b_data;
 	if (!OCFS2_IS_VALID_DINODE(fe)) {
 		OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe);
@@ -363,16 +363,23 @@ static int ocfs2_truncate_file(struct inode *inode,
 	if (new_i_size == le64_to_cpu(fe->i_size))
 		goto bail;
 
+	down_write(&OCFS2_I(inode)->ip_alloc_sem);
+
 	/* This forces other nodes to sync and drop their pages. Do
 	 * this even if we have a truncate without allocation change -
 	 * ocfs2 cluster sizes can be much greater than page size, so
 	 * we have to truncate them anyway.  */
 	status = ocfs2_data_lock(inode, 1);
 	if (status < 0) {
+		up_write(&OCFS2_I(inode)->ip_alloc_sem);
+
 		mlog_errno(status);
 		goto bail;
 	}
 
+	unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
+	truncate_inode_pages(inode->i_mapping, new_i_size);
+
 	/* alright, we're going to need to do a full blown alloc size
 	 * change. Orphan the inode so that recovery can complete the
 	 * truncate if necessary. This does the task of marking
@@ -399,6 +406,8 @@ static int ocfs2_truncate_file(struct inode *inode,
 bail_unlock_data:
 	ocfs2_data_unlock(inode, 1);
 
+	up_write(&OCFS2_I(inode)->ip_alloc_sem);
+
 bail:
 
 	mlog_exit(status);
@@ -419,6 +428,7 @@ int ocfs2_do_extend_allocation(struct ocfs2_super *osb,
 			       struct inode *inode,
 			       u32 *logical_offset,
 			       u32 clusters_to_add,
+			       int mark_unwritten,
 			       struct buffer_head *fe_bh,
 			       handle_t *handle,
 			       struct ocfs2_alloc_context *data_ac,
@@ -431,9 +441,13 @@ int ocfs2_do_extend_allocation(struct ocfs2_super *osb,
 	enum ocfs2_alloc_restarted reason = RESTART_NONE;
 	u32 bit_off, num_bits;
 	u64 block;
+	u8 flags = 0;
 
 	BUG_ON(!clusters_to_add);
 
+	if (mark_unwritten)
+		flags = OCFS2_EXT_UNWRITTEN;
+
 	free_extents = ocfs2_num_free_extents(osb, inode, fe);
 	if (free_extents < 0) {
 		status = free_extents;
@@ -483,7 +497,7 @@ int ocfs2_do_extend_allocation(struct ocfs2_super *osb,
 	     num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno);
 	status = ocfs2_insert_extent(osb, handle, inode, fe_bh,
 				     *logical_offset, block, num_bits,
-				     meta_ac);
+				     flags, meta_ac);
 	if (status < 0) {
 		mlog_errno(status);
 		goto leave;
@@ -516,25 +530,31 @@ leave:
  * For a given allocation, determine which allocators will need to be
  * accessed, and lock them, reserving the appropriate number of bits.
  *
- * Called from ocfs2_extend_allocation() for file systems which don't
- * support holes, and from ocfs2_write() for file systems which
- * understand sparse inodes.
+ * Sparse file systems call this from ocfs2_write_begin_nolock()
+ * and ocfs2_allocate_unwritten_extents().
+ *
+ * File systems which don't support holes call this from
+ * ocfs2_extend_allocation().
  */
 int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_dinode *di,
-			  u32 clusters_to_add,
+			  u32 clusters_to_add, u32 extents_to_split,
 			  struct ocfs2_alloc_context **data_ac,
 			  struct ocfs2_alloc_context **meta_ac)
 {
-	int ret, num_free_extents;
+	int ret = 0, num_free_extents;
+	unsigned int max_recs_needed = clusters_to_add + 2 * extents_to_split;
 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
 
 	*meta_ac = NULL;
-	*data_ac = NULL;
+	if (data_ac)
+		*data_ac = NULL;
+
+	BUG_ON(clusters_to_add != 0 && data_ac == NULL);
 
 	mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, "
-	     "clusters_to_add = %u\n",
+	     "clusters_to_add = %u, extents_to_split = %u\n",
 	     (unsigned long long)OCFS2_I(inode)->ip_blkno, i_size_read(inode),
-	     le32_to_cpu(di->i_clusters), clusters_to_add);
+	     le32_to_cpu(di->i_clusters), clusters_to_add, extents_to_split);
 
 	num_free_extents = ocfs2_num_free_extents(osb, inode, di);
 	if (num_free_extents < 0) {
@@ -552,9 +572,12 @@ int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_dinode *di,
 	 *
 	 * Most of the time we'll only be seeing this 1 cluster at a time
 	 * anyway.
+	 *
+	 * Always lock for any unwritten extents - we might want to
+	 * add blocks during a split.
 	 */
 	if (!num_free_extents ||
-	    (ocfs2_sparse_alloc(osb) && num_free_extents < clusters_to_add)) {
+	    (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) {
 		ret = ocfs2_reserve_new_metadata(osb, di, meta_ac);
 		if (ret < 0) {
 			if (ret != -ENOSPC)
@@ -563,6 +586,9 @@ int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_dinode *di,
 		}
 	}
 
+	if (clusters_to_add == 0)
+		goto out;
+
 	ret = ocfs2_reserve_clusters(osb, clusters_to_add, data_ac);
 	if (ret < 0) {
 		if (ret != -ENOSPC)
@@ -585,14 +611,13 @@ out:
 	return ret;
 }
 
-static int ocfs2_extend_allocation(struct inode *inode,
-				   u32 clusters_to_add)
+static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
+				     u32 clusters_to_add, int mark_unwritten)
 {
 	int status = 0;
 	int restart_func = 0;
-	int drop_alloc_sem = 0;
 	int credits;
-	u32 prev_clusters, logical_start;
+	u32 prev_clusters;
 	struct buffer_head *bh = NULL;
 	struct ocfs2_dinode *fe = NULL;
 	handle_t *handle = NULL;
@@ -607,7 +632,7 @@ static int ocfs2_extend_allocation(struct inode *inode,
 	 * This function only exists for file systems which don't
 	 * support holes.
 	 */
-	BUG_ON(ocfs2_sparse_alloc(osb));
+	BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb));
 
 	status = ocfs2_read_block(osb, OCFS2_I(inode)->ip_blkno, &bh,
 				  OCFS2_BH_CACHED, inode);
@@ -623,19 +648,10 @@ static int ocfs2_extend_allocation(struct inode *inode,
 		goto leave;
 	}
 
-	logical_start = OCFS2_I(inode)->ip_clusters;
-
 restart_all:
 	BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters);
 
-	/* blocks peope in read/write from reading our allocation
-	 * until we're done changing it. We depend on i_mutex to block
-	 * other extend/truncate calls while we're here. Ordering wrt
-	 * start_trans is important here -- always do it before! */
-	down_write(&OCFS2_I(inode)->ip_alloc_sem);
-	drop_alloc_sem = 1;
-
-	status = ocfs2_lock_allocators(inode, fe, clusters_to_add, &data_ac,
+	status = ocfs2_lock_allocators(inode, fe, clusters_to_add, 0, &data_ac,
 				       &meta_ac);
 	if (status) {
 		mlog_errno(status);
@@ -668,6 +684,7 @@ restarted_transaction:
 					    inode,
 					    &logical_start,
 					    clusters_to_add,
+					    mark_unwritten,
 					    bh,
 					    handle,
 					    data_ac,
@@ -720,10 +737,6 @@ restarted_transaction:
 	     OCFS2_I(inode)->ip_clusters, i_size_read(inode));
 
 leave:
-	if (drop_alloc_sem) {
-		up_write(&OCFS2_I(inode)->ip_alloc_sem);
-		drop_alloc_sem = 0;
-	}
 	if (handle) {
 		ocfs2_commit_trans(osb, handle);
 		handle = NULL;
@@ -749,6 +762,25 @@ leave:
 	return status;
 }
 
+static int ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
+				   u32 clusters_to_add, int mark_unwritten)
+{
+	int ret;
+
+	/*
+	 * The alloc sem blocks peope in read/write from reading our
+	 * allocation until we're done changing it. We depend on
+	 * i_mutex to block other extend/truncate calls while we're
+	 * here.
+	 */
+	down_write(&OCFS2_I(inode)->ip_alloc_sem);
+	ret = __ocfs2_extend_allocation(inode, logical_start, clusters_to_add,
+					mark_unwritten);
+	up_write(&OCFS2_I(inode)->ip_alloc_sem);
+
+	return ret;
+}
+
 /* Some parts of this taken from generic_cont_expand, which turned out
  * to be too fragile to do exactly what we need without us having to
  * worry about recursive locking in ->prepare_write() and
@@ -890,7 +922,9 @@ static int ocfs2_extend_file(struct inode *inode,
 	}
 
 	if (clusters_to_add) {
-		ret = ocfs2_extend_allocation(inode, clusters_to_add);
+		ret = ocfs2_extend_allocation(inode,
+					      OCFS2_I(inode)->ip_clusters,
+					      clusters_to_add, 0);
 		if (ret < 0) {
 			mlog_errno(ret);
 			goto out_unlock;
@@ -995,6 +1029,13 @@ int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
 		goto bail_unlock;
 	}
 
+	/*
+	 * This will intentionally not wind up calling vmtruncate(),
+	 * since all the work for a size change has been done above.
+	 * Otherwise, we could get into problems with truncate as
+	 * ip_alloc_sem is used there to protect against i_size
+	 * changes.
+	 */
 	status = inode_setattr(inode, attr);
 	if (status < 0) {
 		mlog_errno(status);
@@ -1070,17 +1111,16 @@ out:
 	return ret;
 }
 
-static int ocfs2_write_remove_suid(struct inode *inode)
+static int __ocfs2_write_remove_suid(struct inode *inode,
+				     struct buffer_head *bh)
 {
 	int ret;
-	struct buffer_head *bh = NULL;
-	struct ocfs2_inode_info *oi = OCFS2_I(inode);
 	handle_t *handle;
 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
 	struct ocfs2_dinode *di;
 
 	mlog_entry("(Inode %llu, mode 0%o)\n",
-		   (unsigned long long)oi->ip_blkno, inode->i_mode);
+		   (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode);
 
 	handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
 	if (handle == NULL) {
@@ -1089,17 +1129,11 @@ static int ocfs2_write_remove_suid(struct inode *inode)
 		goto out;
 	}
 
-	ret = ocfs2_read_block(osb, oi->ip_blkno, &bh, OCFS2_BH_CACHED, inode);
-	if (ret < 0) {
-		mlog_errno(ret);
-		goto out_trans;
-	}
-
 	ret = ocfs2_journal_access(handle, inode, bh,
 				   OCFS2_JOURNAL_ACCESS_WRITE);
 	if (ret < 0) {
 		mlog_errno(ret);
-		goto out_bh;
+		goto out_trans;
 	}
 
 	inode->i_mode &= ~S_ISUID;
@@ -1112,8 +1146,7 @@ static int ocfs2_write_remove_suid(struct inode *inode)
 	ret = ocfs2_journal_dirty(handle, bh);
 	if (ret < 0)
 		mlog_errno(ret);
-out_bh:
-	brelse(bh);
+
 out_trans:
 	ocfs2_commit_trans(osb, handle);
 out:
@@ -1159,6 +1192,460 @@ out:
 	return ret;
 }
 
+static int ocfs2_write_remove_suid(struct inode *inode)
+{
+	int ret;
+	struct buffer_head *bh = NULL;
+	struct ocfs2_inode_info *oi = OCFS2_I(inode);
+
+	ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
+			       oi->ip_blkno, &bh, OCFS2_BH_CACHED, inode);
+	if (ret < 0) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	ret =  __ocfs2_write_remove_suid(inode, bh);
+out:
+	brelse(bh);
+	return ret;
+}
+
+/*
+ * Allocate enough extents to cover the region starting at byte offset
+ * start for len bytes. Existing extents are skipped, any extents
+ * added are marked as "unwritten".
+ */
+static int ocfs2_allocate_unwritten_extents(struct inode *inode,
+					    u64 start, u64 len)
+{
+	int ret;
+	u32 cpos, phys_cpos, clusters, alloc_size;
+
+	/*
+	 * We consider both start and len to be inclusive.
+	 */
+	cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
+	clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len);
+	clusters -= cpos;
+
+	while (clusters) {
+		ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
+					 &alloc_size, NULL);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		/*
+		 * Hole or existing extent len can be arbitrary, so
+		 * cap it to our own allocation request.
+		 */
+		if (alloc_size > clusters)
+			alloc_size = clusters;
+
+		if (phys_cpos) {
+			/*
+			 * We already have an allocation at this
+			 * region so we can safely skip it.
+			 */
+			goto next;
+		}
+
+		ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1);
+		if (ret) {
+			if (ret != -ENOSPC)
+				mlog_errno(ret);
+			goto out;
+		}
+
+next:
+		cpos += alloc_size;
+		clusters -= alloc_size;
+	}
+
+	ret = 0;
+out:
+	return ret;
+}
+
+static int __ocfs2_remove_inode_range(struct inode *inode,
+				      struct buffer_head *di_bh,
+				      u32 cpos, u32 phys_cpos, u32 len,
+				      struct ocfs2_cached_dealloc_ctxt *dealloc)
+{
+	int ret;
+	u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
+	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+	struct inode *tl_inode = osb->osb_tl_inode;
+	handle_t *handle;
+	struct ocfs2_alloc_context *meta_ac = NULL;
+	struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+
+	ret = ocfs2_lock_allocators(inode, di, 0, 1, NULL, &meta_ac);
+	if (ret) {
+		mlog_errno(ret);
+		return ret;
+	}
+
+	mutex_lock(&tl_inode->i_mutex);
+
+	if (ocfs2_truncate_log_needs_flush(osb)) {
+		ret = __ocfs2_flush_truncate_log(osb);
+		if (ret < 0) {
+			mlog_errno(ret);
+			goto out;
+		}
+	}
+
+	handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS);
+	if (handle == NULL) {
+		ret = -ENOMEM;
+		mlog_errno(ret);
+		goto out;
+	}
+
+	ret = ocfs2_journal_access(handle, inode, di_bh,
+				   OCFS2_JOURNAL_ACCESS_WRITE);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	ret = ocfs2_remove_extent(inode, di_bh, cpos, len, handle, meta_ac,
+				  dealloc);
+	if (ret) {
+		mlog_errno(ret);
+		goto out_commit;
+	}
+
+	OCFS2_I(inode)->ip_clusters -= len;
+	di->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
+
+	ret = ocfs2_journal_dirty(handle, di_bh);
+	if (ret) {
+		mlog_errno(ret);
+		goto out_commit;
+	}
+
+	ret = ocfs2_truncate_log_append(osb, handle, phys_blkno, len);
+	if (ret)
+		mlog_errno(ret);
+
+out_commit:
+	ocfs2_commit_trans(osb, handle);
+out:
+	mutex_unlock(&tl_inode->i_mutex);
+
+	if (meta_ac)
+		ocfs2_free_alloc_context(meta_ac);
+
+	return ret;
+}
+
+/*
+ * Truncate a byte range, avoiding pages within partial clusters. This
+ * preserves those pages for the zeroing code to write to.
+ */
+static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start,
+					 u64 byte_len)
+{
+	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+	loff_t start, end;
+	struct address_space *mapping = inode->i_mapping;
+
+	start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start);
+	end = byte_start + byte_len;
+	end = end & ~(osb->s_clustersize - 1);
+
+	if (start < end) {
+		unmap_mapping_range(mapping, start, end - start, 0);
+		truncate_inode_pages_range(mapping, start, end - 1);
+	}
+}
+
+static int ocfs2_zero_partial_clusters(struct inode *inode,
+				       u64 start, u64 len)
+{
+	int ret = 0;
+	u64 tmpend, end = start + len;
+	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+	unsigned int csize = osb->s_clustersize;
+	handle_t *handle;
+
+	/*
+	 * The "start" and "end" values are NOT necessarily part of
+	 * the range whose allocation is being deleted. Rather, this
+	 * is what the user passed in with the request. We must zero
+	 * partial clusters here. There's no need to worry about
+	 * physical allocation - the zeroing code knows to skip holes.
+	 */
+	mlog(0, "byte start: %llu, end: %llu\n",
+	     (unsigned long long)start, (unsigned long long)end);
+
+	/*
+	 * If both edges are on a cluster boundary then there's no
+	 * zeroing required as the region is part of the allocation to
+	 * be truncated.
+	 */
+	if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0)
+		goto out;
+
+	handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
+	if (handle == NULL) {
+		ret = -ENOMEM;
+		mlog_errno(ret);
+		goto out;
+	}
+
+	/*
+	 * We want to get the byte offset of the end of the 1st cluster.
+	 */
+	tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1));
+	if (tmpend > end)
+		tmpend = end;
+
+	mlog(0, "1st range: start: %llu, tmpend: %llu\n",
+	     (unsigned long long)start, (unsigned long long)tmpend);
+
+	ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend);
+	if (ret)
+		mlog_errno(ret);
+
+	if (tmpend < end) {
+		/*
+		 * This may make start and end equal, but the zeroing
+		 * code will skip any work in that case so there's no
+		 * need to catch it up here.
+		 */
+		start = end & ~(osb->s_clustersize - 1);
+
+		mlog(0, "2nd range: start: %llu, end: %llu\n",
+		     (unsigned long long)start, (unsigned long long)end);
+
+		ret = ocfs2_zero_range_for_truncate(inode, handle, start, end);
+		if (ret)
+			mlog_errno(ret);
+	}
+
+	ocfs2_commit_trans(osb, handle);
+out:
+	return ret;
+}
+
+static int ocfs2_remove_inode_range(struct inode *inode,
+				    struct buffer_head *di_bh, u64 byte_start,
+				    u64 byte_len)
+{
+	int ret = 0;
+	u32 trunc_start, trunc_len, cpos, phys_cpos, alloc_size;
+	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+	struct ocfs2_cached_dealloc_ctxt dealloc;
+
+	ocfs2_init_dealloc_ctxt(&dealloc);
+
+	if (byte_len == 0)
+		return 0;
+
+	trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
+	trunc_len = (byte_start + byte_len) >> osb->s_clustersize_bits;
+	if (trunc_len >= trunc_start)
+		trunc_len -= trunc_start;
+	else
+		trunc_len = 0;
+
+	mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, clen: %u\n",
+	     (unsigned long long)OCFS2_I(inode)->ip_blkno,
+	     (unsigned long long)byte_start,
+	     (unsigned long long)byte_len, trunc_start, trunc_len);
+
+	ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	cpos = trunc_start;
+	while (trunc_len) {
+		ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
+					 &alloc_size, NULL);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
+
+		if (alloc_size > trunc_len)
+			alloc_size = trunc_len;
+
+		/* Only do work for non-holes */
+		if (phys_cpos != 0) {
+			ret = __ocfs2_remove_inode_range(inode, di_bh, cpos,
+							 phys_cpos, alloc_size,
+							 &dealloc);
+			if (ret) {
+				mlog_errno(ret);
+				goto out;
+			}
+		}
+
+		cpos += alloc_size;
+		trunc_len -= alloc_size;
+	}
+
+	ocfs2_truncate_cluster_pages(inode, byte_start, byte_len);
+
+out:
+	ocfs2_schedule_truncate_log_flush(osb, 1);
+	ocfs2_run_deallocs(osb, &dealloc);
+
+	return ret;
+}
+
+/*
+ * Parts of this function taken from xfs_change_file_space()
+ */
+int ocfs2_change_file_space(struct file *file, unsigned int cmd,
+			    struct ocfs2_space_resv *sr)
+{
+	int ret;
+	s64 llen;
+	struct inode *inode = file->f_path.dentry->d_inode;
+	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+	struct buffer_head *di_bh = NULL;
+	handle_t *handle;
+	unsigned long long max_off = ocfs2_max_file_offset(inode->i_sb->s_blocksize_bits);
+
+	if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&
+	    !ocfs2_writes_unwritten_extents(osb))
+		return -ENOTTY;
+	else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&
+		 !ocfs2_sparse_alloc(osb))
+		return -ENOTTY;
+
+	if (!S_ISREG(inode->i_mode))
+		return -EINVAL;
+
+	if (!(file->f_mode & FMODE_WRITE))
+		return -EBADF;
+
+	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
+		return -EROFS;
+
+	mutex_lock(&inode->i_mutex);
+
+	/*
+	 * This prevents concurrent writes on other nodes
+	 */
+	ret = ocfs2_rw_lock(inode, 1);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
+
+	ret = ocfs2_meta_lock(inode, &di_bh, 1);
+	if (ret) {
+		mlog_errno(ret);
+		goto out_rw_unlock;
+	}
+
+	if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
+		ret = -EPERM;
+		goto out_meta_unlock;
+	}
+
+	switch (sr->l_whence) {
+	case 0: /*SEEK_SET*/
+		break;
+	case 1: /*SEEK_CUR*/
+		sr->l_start += file->f_pos;
+		break;
+	case 2: /*SEEK_END*/
+		sr->l_start += i_size_read(inode);
+		break;
+	default:
+		ret = -EINVAL;
+		goto out_meta_unlock;
+	}
+	sr->l_whence = 0;
+
+	llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len;
+
+	if (sr->l_start < 0
+	    || sr->l_start > max_off
+	    || (sr->l_start + llen) < 0
+	    || (sr->l_start + llen) > max_off) {
+		ret = -EINVAL;
+		goto out_meta_unlock;
+	}
+
+	if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) {
+		if (sr->l_len <= 0) {
+			ret = -EINVAL;
+			goto out_meta_unlock;
+		}
+	}
+
+	if (should_remove_suid(file->f_path.dentry)) {
+		ret = __ocfs2_write_remove_suid(inode, di_bh);
+		if (ret) {
+			mlog_errno(ret);
+			goto out_meta_unlock;
+		}
+	}
+
+	down_write(&OCFS2_I(inode)->ip_alloc_sem);
+	switch (cmd) {
+	case OCFS2_IOC_RESVSP:
+	case OCFS2_IOC_RESVSP64:
+		/*
+		 * This takes unsigned offsets, but the signed ones we
+		 * pass have been checked against overflow above.
+		 */
+		ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start,
+						       sr->l_len);
+		break;
+	case OCFS2_IOC_UNRESVSP:
+	case OCFS2_IOC_UNRESVSP64:
+		ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start,
+					       sr->l_len);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+	up_write(&OCFS2_I(inode)->ip_alloc_sem);
+	if (ret) {
+		mlog_errno(ret);
+		goto out_meta_unlock;
+	}
+
+	/*
+	 * We update c/mtime for these changes
+	 */
+	handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
+	if (IS_ERR(handle)) {
+		ret = PTR_ERR(handle);
+		mlog_errno(ret);
+		goto out_meta_unlock;
+	}
+
+	inode->i_ctime = inode->i_mtime = CURRENT_TIME;
+	ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
+	if (ret < 0)
+		mlog_errno(ret);
+
+	ocfs2_commit_trans(osb, handle);
+
+out_meta_unlock:
+	brelse(di_bh);
+	ocfs2_meta_unlock(inode, 1);
+out_rw_unlock:
+	ocfs2_rw_unlock(inode, 1);
+
+	mutex_unlock(&inode->i_mutex);
+out:
+	return ret;
+}
+
 static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
 					 loff_t *ppos,
 					 size_t count,
@@ -1329,15 +1816,16 @@ ocfs2_set_next_iovec(const struct iovec **iovp, size_t *basep, size_t bytes)
 	*basep = base;
 }
 
-static struct page * ocfs2_get_write_source(struct ocfs2_buffered_write_priv *bp,
+static struct page * ocfs2_get_write_source(char **ret_src_buf,
 					    const struct iovec *cur_iov,
 					    size_t iov_offset)
 {
 	int ret;
-	char *buf;
+	char *buf = cur_iov->iov_base + iov_offset;
 	struct page *src_page = NULL;
+	unsigned long off;
 
-	buf = cur_iov->iov_base + iov_offset;
+	off = (unsigned long)(buf) & ~PAGE_CACHE_MASK;
 
 	if (!segment_eq(get_fs(), KERNEL_DS)) {
 		/*
@@ -1349,18 +1837,17 @@ static struct page * ocfs2_get_write_source(struct ocfs2_buffered_write_priv *bp
 				     (unsigned long)buf & PAGE_CACHE_MASK, 1,
 				     0, 0, &src_page, NULL);
 		if (ret == 1)
-			bp->b_src_buf = kmap(src_page);
+			*ret_src_buf = kmap(src_page) + off;
 		else
 			src_page = ERR_PTR(-EFAULT);
 	} else {
-		bp->b_src_buf = buf;
+		*ret_src_buf = buf;
 	}
 
 	return src_page;
 }
 
-static void ocfs2_put_write_source(struct ocfs2_buffered_write_priv *bp,
-				   struct page *page)
+static void ocfs2_put_write_source(struct page *page)
 {
 	if (page) {
 		kunmap(page);
@@ -1376,10 +1863,13 @@ static ssize_t ocfs2_file_buffered_write(struct file *file, loff_t *ppos,
 {
 	int ret = 0;
 	ssize_t copied, total = 0;
-	size_t iov_offset = 0;
+	size_t iov_offset = 0, bytes;
+	loff_t pos;
 	const struct iovec *cur_iov = iov;
-	struct ocfs2_buffered_write_priv bp;
-	struct page *page;
+	struct page *user_page, *page;
+	char * uninitialized_var(buf);
+	char *dst;
+	void *fsdata;
 
 	/*
 	 * handle partial DIO write.  Adjust cur_iov if needed.
@@ -1387,21 +1877,38 @@ static ssize_t ocfs2_file_buffered_write(struct file *file, loff_t *ppos,
 	ocfs2_set_next_iovec(&cur_iov, &iov_offset, o_direct_written);
 
 	do {
-		bp.b_cur_off = iov_offset;
-		bp.b_cur_iov = cur_iov;
+		pos = *ppos;
 
-		page = ocfs2_get_write_source(&bp, cur_iov, iov_offset);
-		if (IS_ERR(page)) {
-			ret = PTR_ERR(page);
+		user_page = ocfs2_get_write_source(&buf, cur_iov, iov_offset);
+		if (IS_ERR(user_page)) {
+			ret = PTR_ERR(user_page);
 			goto out;
 		}
 
-		copied = ocfs2_buffered_write_cluster(file, *ppos, count,
-						      ocfs2_map_and_write_user_data,
-						      &bp);
+		/* Stay within our page boundaries */
+		bytes = min((PAGE_CACHE_SIZE - ((unsigned long)pos & ~PAGE_CACHE_MASK)),
+			    (PAGE_CACHE_SIZE - ((unsigned long)buf & ~PAGE_CACHE_MASK)));
+		/* Stay within the vector boundary */
+		bytes = min_t(size_t, bytes, cur_iov->iov_len - iov_offset);
+		/* Stay within count */
+		bytes = min(bytes, count);
+
+		page = NULL;
+		ret = ocfs2_write_begin(file, file->f_mapping, pos, bytes, 0,
+					&page, &fsdata);
+		if (ret) {
+			mlog_errno(ret);
+			goto out;
+		}
 
-		ocfs2_put_write_source(&bp, page);
+		dst = kmap_atomic(page, KM_USER0);
+		memcpy(dst + (pos & (PAGE_CACHE_SIZE - 1)), buf, bytes);
+		kunmap_atomic(dst, KM_USER0);
+		flush_dcache_page(page);
+		ocfs2_put_write_source(user_page);
 
+		copied = ocfs2_write_end(file, file->f_mapping, pos, bytes,
+					 bytes, page, fsdata);
 		if (copied < 0) {
 			mlog_errno(copied);
 			ret = copied;
@@ -1409,7 +1916,7 @@ static ssize_t ocfs2_file_buffered_write(struct file *file, loff_t *ppos,
 		}
 
 		total += copied;
-		*ppos = *ppos + copied;
+		*ppos = pos + copied;
 		count -= copied;
 
 		ocfs2_set_next_iovec(&cur_iov, &iov_offset, copied);
@@ -1579,52 +2086,46 @@ static int ocfs2_splice_write_actor(struct pipe_inode_info *pipe,
 				    struct pipe_buffer *buf,
 				    struct splice_desc *sd)
 {
-	int ret, count, total = 0;
+	int ret, count;
 	ssize_t copied = 0;
-	struct ocfs2_splice_write_priv sp;
+	struct file *file = sd->u.file;
+	unsigned int offset;
+	struct page *page = NULL;
+	void *fsdata;
+	char *src, *dst;
 
-	ret = buf->ops->pin(pipe, buf);
+	ret = buf->ops->confirm(pipe, buf);
 	if (ret)
 		goto out;
 
-	sp.s_sd = sd;
-	sp.s_buf = buf;
-	sp.s_pipe = pipe;
-	sp.s_offset = sd->pos & ~PAGE_CACHE_MASK;
-	sp.s_buf_offset = buf->offset;
-
+	offset = sd->pos & ~PAGE_CACHE_MASK;
 	count = sd->len;
-	if (count + sp.s_offset > PAGE_CACHE_SIZE)
-		count = PAGE_CACHE_SIZE - sp.s_offset;
+	if (count + offset > PAGE_CACHE_SIZE)
+		count = PAGE_CACHE_SIZE - offset;
 
-	do {
-		/*
-		 * splice wants us to copy up to one page at a
-		 * time. For pagesize > cluster size, this means we
-		 * might enter ocfs2_buffered_write_cluster() more
-		 * than once, so keep track of our progress here.
-		 */
-		copied = ocfs2_buffered_write_cluster(sd->file,
-						      (loff_t)sd->pos + total,
-						      count,
-						      ocfs2_map_and_write_splice_data,
-						      &sp);
-		if (copied < 0) {
-			mlog_errno(copied);
-			ret = copied;
-			goto out;
-		}
+	ret = ocfs2_write_begin(file, file->f_mapping, sd->pos, count, 0,
+				&page, &fsdata);
+	if (ret) {
+		mlog_errno(ret);
+		goto out;
+	}
 
-		count -= copied;
-		sp.s_offset += copied;
-		sp.s_buf_offset += copied;
-		total += copied;
-	} while (count);
+	src = buf->ops->map(pipe, buf, 1);
+	dst = kmap_atomic(page, KM_USER1);
+	memcpy(dst + offset, src + buf->offset, count);
+	kunmap_atomic(page, KM_USER1);
+	buf->ops->unmap(pipe, buf, src);
 
-	ret = 0;
+	copied = ocfs2_write_end(file, file->f_mapping, sd->pos, count, count,
+				 page, fsdata);
+	if (copied < 0) {
+		mlog_errno(copied);
+		ret = copied;
+		goto out;
+	}
 out:
 
-	return total ? total : ret;
+	return copied ? copied : ret;
 }
 
 static ssize_t __ocfs2_file_splice_write(struct pipe_inode_info *pipe,
@@ -1636,9 +2137,14 @@ static ssize_t __ocfs2_file_splice_write(struct pipe_inode_info *pipe,
 	int ret, err;
 	struct address_space *mapping = out->f_mapping;
 	struct inode *inode = mapping->host;
-
-	ret = __splice_from_pipe(pipe, out, ppos, len, flags,
-				 ocfs2_splice_write_actor);
+	struct splice_desc sd = {
+		.total_len = len,
+		.flags = flags,
+		.pos = *ppos,
+		.u.file = out,
+	};
+
+	ret = __splice_from_pipe(pipe, &sd, ocfs2_splice_write_actor);
 	if (ret > 0) {
 		*ppos += ret;
 
@@ -1817,7 +2323,6 @@ const struct inode_operations ocfs2_special_file_iops = {
 const struct file_operations ocfs2_fops = {
 	.read		= do_sync_read,
 	.write		= do_sync_write,
-	.sendfile	= generic_file_sendfile,
 	.mmap		= ocfs2_mmap,
 	.fsync		= ocfs2_sync_file,
 	.release	= ocfs2_file_release,
diff --git a/fs/ocfs2/file.h b/fs/ocfs2/file.h
index a4dd1fa..36fe27f 100644
--- a/fs/ocfs2/file.h
+++ b/fs/ocfs2/file.h
@@ -39,15 +39,16 @@ enum ocfs2_alloc_restarted {
 };
 int ocfs2_do_extend_allocation(struct ocfs2_super *osb,
 			       struct inode *inode,
-			       u32 *cluster_start,
+			       u32 *logical_offset,
 			       u32 clusters_to_add,
+			       int mark_unwritten,
 			       struct buffer_head *fe_bh,
 			       handle_t *handle,
 			       struct ocfs2_alloc_context *data_ac,
 			       struct ocfs2_alloc_context *meta_ac,
-			       enum ocfs2_alloc_restarted *reason);
+			       enum ocfs2_alloc_restarted *reason_ret);
 int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_dinode *di,
-			  u32 clusters_to_add,
+			  u32 clusters_to_add, u32 extents_to_split,
 			  struct ocfs2_alloc_context **data_ac,
 			  struct ocfs2_alloc_context **meta_ac);
 int ocfs2_setattr(struct dentry *dentry, struct iattr *attr);
@@ -61,4 +62,7 @@ int ocfs2_should_update_atime(struct inode *inode,
 int ocfs2_update_inode_atime(struct inode *inode,
 			     struct buffer_head *bh);
 
+int ocfs2_change_file_space(struct file *file, unsigned int cmd,
+			    struct ocfs2_space_resv *sr);
+
 #endif /* OCFS2_FILE_H */
diff --git a/fs/ocfs2/heartbeat.c b/fs/ocfs2/heartbeat.c
index b25ef63..c4c3617 100644
--- a/fs/ocfs2/heartbeat.c
+++ b/fs/ocfs2/heartbeat.c
@@ -157,16 +157,16 @@ int ocfs2_register_hb_callbacks(struct ocfs2_super *osb)
 	if (ocfs2_mount_local(osb))
 		return 0;
 
-	status = o2hb_register_callback(&osb->osb_hb_down);
+	status = o2hb_register_callback(osb->uuid_str, &osb->osb_hb_down);
 	if (status < 0) {
 		mlog_errno(status);
 		goto bail;
 	}
 
-	status = o2hb_register_callback(&osb->osb_hb_up);
+	status = o2hb_register_callback(osb->uuid_str, &osb->osb_hb_up);
 	if (status < 0) {
 		mlog_errno(status);
-		o2hb_unregister_callback(&osb->osb_hb_down);
+		o2hb_unregister_callback(osb->uuid_str, &osb->osb_hb_down);
 	}
 
 bail:
@@ -178,8 +178,8 @@ void ocfs2_clear_hb_callbacks(struct ocfs2_super *osb)
 	if (ocfs2_mount_local(osb))
 		return;
 
-	o2hb_unregister_callback(&osb->osb_hb_down);
-	o2hb_unregister_callback(&osb->osb_hb_up);
+	o2hb_unregister_callback(osb->uuid_str, &osb->osb_hb_down);
+	o2hb_unregister_callback(osb->uuid_str, &osb->osb_hb_up);
 }
 
 void ocfs2_stop_heartbeat(struct ocfs2_super *osb)
@@ -209,7 +209,7 @@ void ocfs2_stop_heartbeat(struct ocfs2_super *osb)
 	envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
 	envp[2] = NULL;
 
-	ret = call_usermodehelper(argv[0], argv, envp, 1);
+	ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
 	if (ret < 0)
 		mlog_errno(ret);
 }
diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
index f3ad21a..87dcece 100644
--- a/fs/ocfs2/ioctl.c
+++ b/fs/ocfs2/ioctl.c
@@ -14,6 +14,7 @@
 #include "ocfs2.h"
 #include "alloc.h"
 #include "dlmglue.h"
+#include "file.h"
 #include "inode.h"
 #include "journal.h"
 
@@ -62,7 +63,7 @@ static int ocfs2_set_inode_attr(struct inode *inode, unsigned flags,
 		goto bail_unlock;
 
 	status = -EACCES;
-	if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+	if (!is_owner_or_cap(inode))
 		goto bail_unlock;
 
 	if (!S_ISDIR(inode->i_mode))
@@ -115,6 +116,7 @@ int ocfs2_ioctl(struct inode * inode, struct file * filp,
 {
 	unsigned int flags;
 	int status;
+	struct ocfs2_space_resv sr;
 
 	switch (cmd) {
 	case OCFS2_IOC_GETFLAGS:
@@ -130,6 +132,14 @@ int ocfs2_ioctl(struct inode * inode, struct file * filp,
 
 		return ocfs2_set_inode_attr(inode, flags,
 			OCFS2_FL_MODIFIABLE);
+	case OCFS2_IOC_RESVSP:
+	case OCFS2_IOC_RESVSP64:
+	case OCFS2_IOC_UNRESVSP:
+	case OCFS2_IOC_UNRESVSP64:
+		if (copy_from_user(&sr, (int __user *) arg, sizeof(sr)))
+			return -EFAULT;
+
+		return ocfs2_change_file_space(filp, cmd, &sr);
 	default:
 		return -ENOTTY;
 	}
@@ -148,6 +158,11 @@ long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 	case OCFS2_IOC32_SETFLAGS:
 		cmd = OCFS2_IOC_SETFLAGS;
 		break;
+	case OCFS2_IOC_RESVSP:
+	case OCFS2_IOC_RESVSP64:
+	case OCFS2_IOC_UNRESVSP:
+	case OCFS2_IOC_UNRESVSP64:
+		break;
 	default:
 		return -ENOIOCTLCMD;
 	}
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index dc11880..dbfb20b 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -722,8 +722,7 @@ void ocfs2_complete_recovery(struct work_struct *work)
 		container_of(work, struct ocfs2_journal, j_recovery_work);
 	struct ocfs2_super *osb = journal->j_osb;
 	struct ocfs2_dinode *la_dinode, *tl_dinode;
-	struct ocfs2_la_recovery_item *item;
-	struct list_head *p, *n;
+	struct ocfs2_la_recovery_item *item, *n;
 	LIST_HEAD(tmp_la_list);
 
 	mlog_entry_void();
@@ -734,8 +733,7 @@ void ocfs2_complete_recovery(struct work_struct *work)
 	list_splice_init(&journal->j_la_cleanups, &tmp_la_list);
 	spin_unlock(&journal->j_lock);
 
-	list_for_each_safe(p, n, &tmp_la_list) {
-		item = list_entry(p, struct ocfs2_la_recovery_item, lri_list);
+	list_for_each_entry_safe(item, n, &tmp_la_list, lri_list) {
 		list_del_init(&item->lri_list);
 
 		mlog(0, "Complete recovery for slot %d\n", item->lri_slot);
diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h
index 3db5de4..ce60aab 100644
--- a/fs/ocfs2/journal.h
+++ b/fs/ocfs2/journal.h
@@ -289,6 +289,8 @@ int                  ocfs2_journal_dirty_data(handle_t *handle,
 #define OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC (OCFS2_SUBALLOC_FREE 		      \
 					 + OCFS2_TRUNCATE_LOG_UPDATE)
 
+#define OCFS2_REMOVE_EXTENT_CREDITS (OCFS2_TRUNCATE_LOG_UPDATE + OCFS2_INODE_UPDATE_CREDITS)
+
 /* data block for new dir/symlink, 2 for bitmap updates (bitmap fe +
  * bitmap block for the new bit) */
 #define OCFS2_DIR_LINK_ADDITIONAL_CREDITS (1 + 2)
diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c
index af01158..d79aa12 100644
--- a/fs/ocfs2/mmap.c
+++ b/fs/ocfs2/mmap.c
@@ -37,11 +37,29 @@
 
 #include "ocfs2.h"
 
+#include "aops.h"
 #include "dlmglue.h"
 #include "file.h"
 #include "inode.h"
 #include "mmap.h"
 
+static inline int ocfs2_vm_op_block_sigs(sigset_t *blocked, sigset_t *oldset)
+{
+	/* The best way to deal with signals in the vm path is
+	 * to block them upfront, rather than allowing the
+	 * locking paths to return -ERESTARTSYS. */
+	sigfillset(blocked);
+
+	/* We should technically never get a bad return value
+	 * from sigprocmask */
+	return sigprocmask(SIG_BLOCK, blocked, oldset);
+}
+
+static inline int ocfs2_vm_op_unblock_sigs(sigset_t *oldset)
+{
+	return sigprocmask(SIG_SETMASK, oldset, NULL);
+}
+
 static struct page *ocfs2_nopage(struct vm_area_struct * area,
 				 unsigned long address,
 				 int *type)
@@ -53,14 +71,7 @@ static struct page *ocfs2_nopage(struct vm_area_struct * area,
 	mlog_entry("(area=%p, address=%lu, type=%p)\n", area, address,
 		   type);
 
-	/* The best way to deal with signals in this path is
-	 * to block them upfront, rather than allowing the
-	 * locking paths to return -ERESTARTSYS. */
-	sigfillset(&blocked);
-
-	/* We should technically never get a bad ret return
-	 * from sigprocmask */
-	ret = sigprocmask(SIG_BLOCK, &blocked, &oldset);
+	ret = ocfs2_vm_op_block_sigs(&blocked, &oldset);
 	if (ret < 0) {
 		mlog_errno(ret);
 		goto out;
@@ -68,7 +79,7 @@ static struct page *ocfs2_nopage(struct vm_area_struct * area,
 
 	page = filemap_nopage(area, address, type);
 
-	ret = sigprocmask(SIG_SETMASK, &oldset, NULL);
+	ret = ocfs2_vm_op_unblock_sigs(&oldset);
 	if (ret < 0)
 		mlog_errno(ret);
 out:
@@ -76,28 +87,136 @@ out:
 	return page;
 }
 
-static struct vm_operations_struct ocfs2_file_vm_ops = {
-	.nopage = ocfs2_nopage,
-};
+static int __ocfs2_page_mkwrite(struct inode *inode, struct buffer_head *di_bh,
+				struct page *page)
+{
+	int ret;
+	struct address_space *mapping = inode->i_mapping;
+	loff_t pos = page->index << PAGE_CACHE_SHIFT;
+	unsigned int len = PAGE_CACHE_SIZE;
+	pgoff_t last_index;
+	struct page *locked_page = NULL;
+	void *fsdata;
+	loff_t size = i_size_read(inode);
 
-int ocfs2_mmap(struct file *file, struct vm_area_struct *vma)
+	/*
+	 * Another node might have truncated while we were waiting on
+	 * cluster locks.
+	 */
+	last_index = size >> PAGE_CACHE_SHIFT;
+	if (page->index > last_index) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	/*
+	 * The i_size check above doesn't catch the case where nodes
+	 * truncated and then re-extended the file. We'll re-check the
+	 * page mapping after taking the page lock inside of
+	 * ocfs2_write_begin_nolock().
+	 */
+	if (!PageUptodate(page) || page->mapping != inode->i_mapping) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	/*
+	 * Call ocfs2_write_begin() and ocfs2_write_end() to take
+	 * advantage of the allocation code there. We pass a write
+	 * length of the whole page (chopped to i_size) to make sure
+	 * the whole thing is allocated.
+	 *
+	 * Since we know the page is up to date, we don't have to
+	 * worry about ocfs2_write_begin() skipping some buffer reads
+	 * because the "write" would invalidate their data.
+	 */
+	if (page->index == last_index)
+		len = size & ~PAGE_CACHE_MASK;
+
+	ret = ocfs2_write_begin_nolock(mapping, pos, len, 0, &locked_page,
+				       &fsdata, di_bh, page);
+	if (ret) {
+		if (ret != -ENOSPC)
+			mlog_errno(ret);
+		goto out;
+	}
+
+	ret = ocfs2_write_end_nolock(mapping, pos, len, len, locked_page,
+				     fsdata);
+	if (ret < 0) {
+		mlog_errno(ret);
+		goto out;
+	}
+	BUG_ON(ret != len);
+	ret = 0;
+out:
+	return ret;
+}
+
+static int ocfs2_page_mkwrite(struct vm_area_struct *vma, struct page *page)
 {
-	int ret = 0, lock_level = 0;
-	struct ocfs2_super *osb = OCFS2_SB(file->f_dentry->d_inode->i_sb);
+	struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+	struct buffer_head *di_bh = NULL;
+	sigset_t blocked, oldset;
+	int ret, ret2;
+
+	ret = ocfs2_vm_op_block_sigs(&blocked, &oldset);
+	if (ret < 0) {
+		mlog_errno(ret);
+		return ret;
+	}
+
+	/*
+	 * The cluster locks taken will block a truncate from another
+	 * node. Taking the data lock will also ensure that we don't
+	 * attempt page truncation as part of a downconvert.
+	 */
+	ret = ocfs2_meta_lock(inode, &di_bh, 1);
+	if (ret < 0) {
+		mlog_errno(ret);
+		goto out;
+	}
 
 	/*
-	 * Only support shared writeable mmap for local mounts which
-	 * don't know about holes.
+	 * The alloc sem should be enough to serialize with
+	 * ocfs2_truncate_file() changing i_size as well as any thread
+	 * modifying the inode btree.
 	 */
-	if ((!ocfs2_mount_local(osb) || ocfs2_sparse_alloc(osb)) &&
-	    ((vma->vm_flags & VM_SHARED) || (vma->vm_flags & VM_MAYSHARE)) &&
-	    ((vma->vm_flags & VM_WRITE) || (vma->vm_flags & VM_MAYWRITE))) {
-		mlog(0, "disallow shared writable mmaps %lx\n", vma->vm_flags);
-		/* This is -EINVAL because generic_file_readonly_mmap
-		 * returns it in a similar situation. */
-		return -EINVAL;
+	down_write(&OCFS2_I(inode)->ip_alloc_sem);
+
+	ret = ocfs2_data_lock(inode, 1);
+	if (ret < 0) {
+		mlog_errno(ret);
+		goto out_meta_unlock;
 	}
 
+	ret = __ocfs2_page_mkwrite(inode, di_bh, page);
+
+	ocfs2_data_unlock(inode, 1);
+
+out_meta_unlock:
+	up_write(&OCFS2_I(inode)->ip_alloc_sem);
+
+	brelse(di_bh);
+	ocfs2_meta_unlock(inode, 1);
+
+out:
+	ret2 = ocfs2_vm_op_unblock_sigs(&oldset);
+	if (ret2 < 0)
+		mlog_errno(ret2);
+
+	return ret;
+}
+
+static struct vm_operations_struct ocfs2_file_vm_ops = {
+	.nopage		= ocfs2_nopage,
+	.page_mkwrite	= ocfs2_page_mkwrite,
+};
+
+int ocfs2_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	int ret = 0, lock_level = 0;
+
 	ret = ocfs2_meta_lock_atime(file->f_dentry->d_inode,
 				    file->f_vfsmnt, &lock_level);
 	if (ret < 0) {
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 36289e6..d430fda 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -1674,7 +1674,7 @@ static int ocfs2_symlink(struct inode *dir,
 		u32 offset = 0;
 
 		inode->i_op = &ocfs2_symlink_inode_operations;
-		status = ocfs2_do_extend_allocation(osb, inode, &offset, 1,
+		status = ocfs2_do_extend_allocation(osb, inode, &offset, 1, 0,
 						    new_fe_bh,
 						    handle, data_ac, NULL,
 						    NULL);
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index a860633..5cc90a4 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -219,6 +219,7 @@ struct ocfs2_super
 	u16 max_slots;
 	s16 node_num;
 	s16 slot_num;
+	s16 preferred_slot;
 	int s_sectsize_bits;
 	int s_clustersize;
 	int s_clustersize_bits;
@@ -305,6 +306,19 @@ static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
 	return 0;
 }
 
+static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb)
+{
+	/*
+	 * Support for sparse files is a pre-requisite
+	 */
+	if (!ocfs2_sparse_alloc(osb))
+		return 0;
+
+	if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN)
+		return 1;
+	return 0;
+}
+
 /* set / clear functions because cluster events can make these happen
  * in parallel so we want the transitions to be atomic. this also
  * means that any future flags osb_flags must be protected by spinlock
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index f0d9eb0..82f8a75 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -88,7 +88,7 @@
 #define OCFS2_FEATURE_COMPAT_SUPP	OCFS2_FEATURE_COMPAT_BACKUP_SB
 #define OCFS2_FEATURE_INCOMPAT_SUPP	(OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT \
 					 | OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
-#define OCFS2_FEATURE_RO_COMPAT_SUPP	0
+#define OCFS2_FEATURE_RO_COMPAT_SUPP	OCFS2_FEATURE_RO_COMPAT_UNWRITTEN
 
 /*
  * Heartbeat-only devices are missing journals and other files.  The
@@ -116,6 +116,11 @@
  */
 #define OCFS2_FEATURE_COMPAT_BACKUP_SB		0x0001
 
+/*
+ * Unwritten extents support.
+ */
+#define OCFS2_FEATURE_RO_COMPAT_UNWRITTEN	0x0001
+
 /* The byte offset of the first backup block will be 1G.
  * The following will be 4G, 16G, 64G, 256G and 1T.
  */
@@ -170,6 +175,32 @@
 #define OCFS2_IOC32_SETFLAGS	_IOW('f', 2, int)
 
 /*
+ * Space reservation / allocation / free ioctls and argument structure
+ * are designed to be compatible with XFS.
+ *
+ * ALLOCSP* and FREESP* are not and will never be supported, but are
+ * included here for completeness.
+ */
+struct ocfs2_space_resv {
+	__s16		l_type;
+	__s16		l_whence;
+	__s64		l_start;
+	__s64		l_len;		/* len == 0 means until end of file */
+	__s32		l_sysid;
+	__u32		l_pid;
+	__s32		l_pad[4];	/* reserve area			    */
+};
+
+#define OCFS2_IOC_ALLOCSP		_IOW ('X', 10, struct ocfs2_space_resv)
+#define OCFS2_IOC_FREESP		_IOW ('X', 11, struct ocfs2_space_resv)
+#define OCFS2_IOC_RESVSP		_IOW ('X', 40, struct ocfs2_space_resv)
+#define OCFS2_IOC_UNRESVSP	_IOW ('X', 41, struct ocfs2_space_resv)
+#define OCFS2_IOC_ALLOCSP64	_IOW ('X', 36, struct ocfs2_space_resv)
+#define OCFS2_IOC_FREESP64	_IOW ('X', 37, struct ocfs2_space_resv)
+#define OCFS2_IOC_RESVSP64	_IOW ('X', 42, struct ocfs2_space_resv)
+#define OCFS2_IOC_UNRESVSP64	_IOW ('X', 43, struct ocfs2_space_resv)
+
+/*
  * Journal Flags (ocfs2_dinode.id1.journal1.i_flags)
  */
 #define OCFS2_JOURNAL_DIRTY_FL	(0x00000001)	/* Journal needs recovery */
diff --git a/fs/ocfs2/slot_map.c b/fs/ocfs2/slot_map.c
index d8b7906..af4882b 100644
--- a/fs/ocfs2/slot_map.c
+++ b/fs/ocfs2/slot_map.c
@@ -121,17 +121,25 @@ static s16 __ocfs2_node_num_to_slot(struct ocfs2_slot_info *si,
 	return ret;
 }
 
-static s16 __ocfs2_find_empty_slot(struct ocfs2_slot_info *si)
+static s16 __ocfs2_find_empty_slot(struct ocfs2_slot_info *si, s16 preferred)
 {
 	int i;
 	s16 ret = OCFS2_INVALID_SLOT;
 
+	if (preferred >= 0 && preferred < si->si_num_slots) {
+		if (OCFS2_INVALID_SLOT == si->si_global_node_nums[preferred]) {
+			ret = preferred;
+			goto out;
+		}
+	}
+
 	for(i = 0; i < si->si_num_slots; i++) {
 		if (OCFS2_INVALID_SLOT == si->si_global_node_nums[i]) {
 			ret = (s16) i;
 			break;
 		}
 	}
+out:
 	return ret;
 }
 
@@ -248,7 +256,7 @@ int ocfs2_find_slot(struct ocfs2_super *osb)
 	if (slot == OCFS2_INVALID_SLOT) {
 		/* if no slot yet, then just take 1st available
 		 * one. */
-		slot = __ocfs2_find_empty_slot(si);
+		slot = __ocfs2_find_empty_slot(si, osb->preferred_slot);
 		if (slot == OCFS2_INVALID_SLOT) {
 			spin_unlock(&si->si_lock);
 			mlog(ML_ERROR, "no free slots available!\n");
diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c
index e343762..d9c5c9f 100644
--- a/fs/ocfs2/suballoc.c
+++ b/fs/ocfs2/suballoc.c
@@ -98,14 +98,6 @@ static int ocfs2_relink_block_group(handle_t *handle,
 				    u16 chain);
 static inline int ocfs2_block_group_reasonably_empty(struct ocfs2_group_desc *bg,
 						     u32 wanted);
-static int ocfs2_free_suballoc_bits(handle_t *handle,
-				    struct inode *alloc_inode,
-				    struct buffer_head *alloc_bh,
-				    unsigned int start_bit,
-				    u64 bg_blkno,
-				    unsigned int count);
-static inline u64 ocfs2_which_suballoc_group(u64 block,
-					     unsigned int bit);
 static inline u32 ocfs2_desc_bitmap_to_cluster_off(struct inode *inode,
 						   u64 bg_blkno,
 						   u16 bg_bit_off);
@@ -496,13 +488,7 @@ int ocfs2_reserve_new_metadata(struct ocfs2_super *osb,
 
 	(*ac)->ac_bits_wanted = ocfs2_extend_meta_needed(fe);
 	(*ac)->ac_which = OCFS2_AC_USE_META;
-
-#ifndef OCFS2_USE_ALL_METADATA_SUBALLOCATORS
-	slot = 0;
-#else
 	slot = osb->slot_num;
-#endif
-
 	(*ac)->ac_group_search = ocfs2_block_group_search;
 
 	status = ocfs2_reserve_suballoc_bits(osb, (*ac),
@@ -1626,12 +1612,12 @@ bail:
 /*
  * expects the suballoc inode to already be locked.
  */
-static int ocfs2_free_suballoc_bits(handle_t *handle,
-				    struct inode *alloc_inode,
-				    struct buffer_head *alloc_bh,
-				    unsigned int start_bit,
-				    u64 bg_blkno,
-				    unsigned int count)
+int ocfs2_free_suballoc_bits(handle_t *handle,
+			     struct inode *alloc_inode,
+			     struct buffer_head *alloc_bh,
+			     unsigned int start_bit,
+			     u64 bg_blkno,
+			     unsigned int count)
 {
 	int status = 0;
 	u32 tmp_used;
@@ -1703,13 +1689,6 @@ bail:
 	return status;
 }
 
-static inline u64 ocfs2_which_suballoc_group(u64 block, unsigned int bit)
-{
-	u64 group = block - (u64) bit;
-
-	return group;
-}
-
 int ocfs2_free_dinode(handle_t *handle,
 		      struct inode *inode_alloc_inode,
 		      struct buffer_head *inode_alloc_bh,
@@ -1723,19 +1702,6 @@ int ocfs2_free_dinode(handle_t *handle,
 					inode_alloc_bh, bit, bg_blkno, 1);
 }
 
-int ocfs2_free_extent_block(handle_t *handle,
-			    struct inode *eb_alloc_inode,
-			    struct buffer_head *eb_alloc_bh,
-			    struct ocfs2_extent_block *eb)
-{
-	u64 blk = le64_to_cpu(eb->h_blkno);
-	u16 bit = le16_to_cpu(eb->h_suballoc_bit);
-	u64 bg_blkno = ocfs2_which_suballoc_group(blk, bit);
-
-	return ocfs2_free_suballoc_bits(handle, eb_alloc_inode, eb_alloc_bh,
-					bit, bg_blkno, 1);
-}
-
 int ocfs2_free_clusters(handle_t *handle,
 		       struct inode *bitmap_inode,
 		       struct buffer_head *bitmap_bh,
diff --git a/fs/ocfs2/suballoc.h b/fs/ocfs2/suballoc.h
index 1a3c94c..f212dc0 100644
--- a/fs/ocfs2/suballoc.h
+++ b/fs/ocfs2/suballoc.h
@@ -86,20 +86,29 @@ int ocfs2_claim_clusters(struct ocfs2_super *osb,
 			 u32 *cluster_start,
 			 u32 *num_clusters);
 
+int ocfs2_free_suballoc_bits(handle_t *handle,
+			     struct inode *alloc_inode,
+			     struct buffer_head *alloc_bh,
+			     unsigned int start_bit,
+			     u64 bg_blkno,
+			     unsigned int count);
 int ocfs2_free_dinode(handle_t *handle,
 		      struct inode *inode_alloc_inode,
 		      struct buffer_head *inode_alloc_bh,
 		      struct ocfs2_dinode *di);
-int ocfs2_free_extent_block(handle_t *handle,
-			    struct inode *eb_alloc_inode,
-			    struct buffer_head *eb_alloc_bh,
-			    struct ocfs2_extent_block *eb);
 int ocfs2_free_clusters(handle_t *handle,
 			struct inode *bitmap_inode,
 			struct buffer_head *bitmap_bh,
 			u64 start_blk,
 			unsigned int num_clusters);
 
+static inline u64 ocfs2_which_suballoc_group(u64 block, unsigned int bit)
+{
+	u64 group = block - (u64) bit;
+
+	return group;
+}
+
 static inline u32 ocfs2_cluster_from_desc(struct ocfs2_super *osb,
 					  u64 bg_blkno)
 {
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 86b559c..3a5a1ed 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -82,7 +82,8 @@ MODULE_AUTHOR("Oracle");
 MODULE_LICENSE("GPL");
 
 static int ocfs2_parse_options(struct super_block *sb, char *options,
-			       unsigned long *mount_opt, int is_remount);
+			       unsigned long *mount_opt, s16 *slot,
+			       int is_remount);
 static void ocfs2_put_super(struct super_block *sb);
 static int ocfs2_mount_volume(struct super_block *sb);
 static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
@@ -114,8 +115,6 @@ static void ocfs2_write_super(struct super_block *sb);
 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
 static void ocfs2_destroy_inode(struct inode *inode);
 
-static unsigned long long ocfs2_max_file_offset(unsigned int blockshift);
-
 static const struct super_operations ocfs2_sops = {
 	.statfs		= ocfs2_statfs,
 	.alloc_inode	= ocfs2_alloc_inode,
@@ -140,6 +139,7 @@ enum {
 	Opt_data_ordered,
 	Opt_data_writeback,
 	Opt_atime_quantum,
+	Opt_slot,
 	Opt_err,
 };
 
@@ -154,6 +154,7 @@ static match_table_t tokens = {
 	{Opt_data_ordered, "data=ordered"},
 	{Opt_data_writeback, "data=writeback"},
 	{Opt_atime_quantum, "atime_quantum=%u"},
+	{Opt_slot, "preferred_slot=%u"},
 	{Opt_err, NULL}
 };
 
@@ -318,7 +319,7 @@ static void ocfs2_destroy_inode(struct inode *inode)
 /* From xfs_super.c:xfs_max_file_offset
  * Copyright (c) 2000-2004 Silicon Graphics, Inc.
  */
-static unsigned long long ocfs2_max_file_offset(unsigned int blockshift)
+unsigned long long ocfs2_max_file_offset(unsigned int blockshift)
 {
 	unsigned int pagefactor = 1;
 	unsigned int bitshift = BITS_PER_LONG - 1;
@@ -355,9 +356,10 @@ static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
 	int incompat_features;
 	int ret = 0;
 	unsigned long parsed_options;
+	s16 slot;
 	struct ocfs2_super *osb = OCFS2_SB(sb);
 
-	if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
+	if (!ocfs2_parse_options(sb, data, &parsed_options, &slot, 1)) {
 		ret = -EINVAL;
 		goto out;
 	}
@@ -534,6 +536,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
 	struct dentry *root;
 	int status, sector_size;
 	unsigned long parsed_opt;
+	s16 slot;
 	struct inode *inode = NULL;
 	struct ocfs2_super *osb = NULL;
 	struct buffer_head *bh = NULL;
@@ -541,7 +544,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
 
 	mlog_entry("%p, %p, %i", sb, data, silent);
 
-	if (!ocfs2_parse_options(sb, data, &parsed_opt, 0)) {
+	if (!ocfs2_parse_options(sb, data, &parsed_opt, &slot, 0)) {
 		status = -EINVAL;
 		goto read_super_error;
 	}
@@ -571,6 +574,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
 	brelse(bh);
 	bh = NULL;
 	osb->s_mount_opt = parsed_opt;
+	osb->preferred_slot = slot;
 
 	sb->s_magic = OCFS2_SUPER_MAGIC;
 
@@ -713,6 +717,7 @@ static struct file_system_type ocfs2_fs_type = {
 static int ocfs2_parse_options(struct super_block *sb,
 			       char *options,
 			       unsigned long *mount_opt,
+			       s16 *slot,
 			       int is_remount)
 {
 	int status;
@@ -722,6 +727,7 @@ static int ocfs2_parse_options(struct super_block *sb,
 		   options ? options : "(none)");
 
 	*mount_opt = 0;
+	*slot = OCFS2_INVALID_SLOT;
 
 	if (!options) {
 		status = 1;
@@ -782,6 +788,15 @@ static int ocfs2_parse_options(struct super_block *sb,
 			else
 				osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
 			break;
+		case Opt_slot:
+			option = 0;
+			if (match_int(&args[0], &option)) {
+				status = 0;
+				goto bail;
+			}
+			if (option)
+				*slot = (s16)option;
+			break;
 		default:
 			mlog(ML_ERROR,
 			     "Unrecognized mount option \"%s\" "
diff --git a/fs/ocfs2/super.h b/fs/ocfs2/super.h
index 783f527..3b9cb3d 100644
--- a/fs/ocfs2/super.h
+++ b/fs/ocfs2/super.h
@@ -45,4 +45,6 @@ void __ocfs2_abort(struct super_block *sb,
 
 #define ocfs2_abort(sb, fmt, args...) __ocfs2_abort(sb, __PRETTY_FUNCTION__, fmt, ##args)
 
+unsigned long long ocfs2_max_file_offset(unsigned int blockshift);
+
 #endif /* OCFS2_SUPER_H */
diff --git a/fs/open.c b/fs/open.c
index 0d515d1..a6b054e 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -26,6 +26,7 @@
 #include <linux/syscalls.h>
 #include <linux/rcupdate.h>
 #include <linux/audit.h>
+#include <linux/falloc.h>
 
 int vfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
@@ -352,6 +353,64 @@ asmlinkage long sys_ftruncate64(unsigned int fd, loff_t length)
 }
 #endif
 
+asmlinkage long sys_fallocate(int fd, int mode, loff_t offset, loff_t len)
+{
+	struct file *file;
+	struct inode *inode;
+	long ret = -EINVAL;
+
+	if (offset < 0 || len <= 0)
+		goto out;
+
+	/* Return error if mode is not supported */
+	ret = -EOPNOTSUPP;
+	if (mode && !(mode & FALLOC_FL_KEEP_SIZE))
+		goto out;
+
+	ret = -EBADF;
+	file = fget(fd);
+	if (!file)
+		goto out;
+	if (!(file->f_mode & FMODE_WRITE))
+		goto out_fput;
+	/*
+	 * Revalidate the write permissions, in case security policy has
+	 * changed since the files were opened.
+	 */
+	ret = security_file_permission(file, MAY_WRITE);
+	if (ret)
+		goto out_fput;
+
+	inode = file->f_path.dentry->d_inode;
+
+	ret = -ESPIPE;
+	if (S_ISFIFO(inode->i_mode))
+		goto out_fput;
+
+	ret = -ENODEV;
+	/*
+	 * Let individual file system decide if it supports preallocation
+	 * for directories or not.
+	 */
+	if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
+		goto out_fput;
+
+	ret = -EFBIG;
+	/* Check for wrap through zero too */
+	if (((offset + len) > inode->i_sb->s_maxbytes) || ((offset + len) < 0))
+		goto out_fput;
+
+	if (inode->i_op && inode->i_op->fallocate)
+		ret = inode->i_op->fallocate(inode, mode, offset, len);
+	else
+		ret = -ENOSYS;
+
+out_fput:
+	fput(file);
+out:
+	return ret;
+}
+
 /*
  * access() needs to use the real uid/gid, not the effective uid/gid.
  * We do this by temporarily clearing all FS-related capabilities and
@@ -855,7 +914,7 @@ EXPORT_SYMBOL(dentry_open);
 /*
  * Find an empty file descriptor entry, and mark it busy.
  */
-int get_unused_fd(void)
+int get_unused_fd_flags(int flags)
 {
 	struct files_struct * files = current->files;
 	int fd, error;
@@ -891,7 +950,10 @@ repeat:
 	}
 
 	FD_SET(fd, fdt->open_fds);
-	FD_CLR(fd, fdt->close_on_exec);
+	if (flags & O_CLOEXEC)
+		FD_SET(fd, fdt->close_on_exec);
+	else
+		FD_CLR(fd, fdt->close_on_exec);
 	files->next_fd = fd + 1;
 #if 1
 	/* Sanity check */
@@ -907,6 +969,11 @@ out:
 	return error;
 }
 
+int get_unused_fd(void)
+{
+	return get_unused_fd_flags(0);
+}
+
 EXPORT_SYMBOL(get_unused_fd);
 
 static void __put_unused_fd(struct files_struct *files, unsigned int fd)
@@ -959,7 +1026,7 @@ long do_sys_open(int dfd, const char __user *filename, int flags, int mode)
 	int fd = PTR_ERR(tmp);
 
 	if (!IS_ERR(tmp)) {
-		fd = get_unused_fd();
+		fd = get_unused_fd_flags(flags);
 		if (fd >= 0) {
 			struct file *f = do_filp_open(dfd, tmp, flags, mode);
 			if (IS_ERR(f)) {
diff --git a/fs/partitions/acorn.c b/fs/partitions/acorn.c
index e349132..3d3e166 100644
--- a/fs/partitions/acorn.c
+++ b/fs/partitions/acorn.c
@@ -25,6 +25,8 @@
 #define PARTITION_RISCIX_SCSI	2
 #define PARTITION_LINUX		9
 
+#if defined(CONFIG_ACORN_PARTITION_CUMANA) || \
+	defined(CONFIG_ACORN_PARTITION_ADFS)
 static struct adfs_discrecord *
 adfs_partition(struct parsed_partitions *state, char *name, char *data,
 	       unsigned long first_sector, int slot)
@@ -48,6 +50,7 @@ adfs_partition(struct parsed_partitions *state, char *name, char *data,
 	put_partition(state, slot, first_sector, nr_sects);
 	return dr;
 }
+#endif
 
 #ifdef CONFIG_ACORN_PARTITION_RISCIX
 
@@ -65,6 +68,8 @@ struct riscix_record {
 	struct riscix_part part[8];
 };
 
+#if defined(CONFIG_ACORN_PARTITION_CUMANA) || \
+	defined(CONFIG_ACORN_PARTITION_ADFS)
 static int
 riscix_partition(struct parsed_partitions *state, struct block_device *bdev,
 		unsigned long first_sect, int slot, unsigned long nr_sects)
@@ -105,6 +110,7 @@ riscix_partition(struct parsed_partitions *state, struct block_device *bdev,
 	return slot;
 }
 #endif
+#endif
 
 #define LINUX_NATIVE_MAGIC 0xdeafa1de
 #define LINUX_SWAP_MAGIC   0xdeafab1e
@@ -115,6 +121,8 @@ struct linux_part {
 	__le32 nr_sects;
 };
 
+#if defined(CONFIG_ACORN_PARTITION_CUMANA) || \
+	defined(CONFIG_ACORN_PARTITION_ADFS)
 static int
 linux_partition(struct parsed_partitions *state, struct block_device *bdev,
 		unsigned long first_sect, int slot, unsigned long nr_sects)
@@ -146,6 +154,7 @@ linux_partition(struct parsed_partitions *state, struct block_device *bdev,
 	put_dev_sector(sect);
 	return slot;
 }
+#endif
 
 #ifdef CONFIG_ACORN_PARTITION_CUMANA
 int
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index 9a3a058..98e0b85 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -397,7 +397,6 @@ void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len,
 		static struct attribute addpartattr = {
 			.name = "whole_disk",
 			.mode = S_IRUSR | S_IRGRP | S_IROTH,
-			.owner = THIS_MODULE,
 		};
 
 		sysfs_create_file(&p->kobj, &addpartattr);
diff --git a/fs/partitions/ibm.c b/fs/partitions/ibm.c
index 9f7ad42..1e064c4 100644
--- a/fs/partitions/ibm.c
+++ b/fs/partitions/ibm.c
@@ -45,7 +45,7 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
 {
 	int blocksize, offset, size,res;
 	loff_t i_size;
-	dasd_information_t *info;
+	dasd_information2_t *info;
 	struct hd_geometry *geo;
 	char type[5] = {0,};
 	char name[7] = {0,};
@@ -64,14 +64,17 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
 	if (i_size == 0)
 		goto out_exit;
 
-	if ((info = kmalloc(sizeof(dasd_information_t), GFP_KERNEL)) == NULL)
+	info = kmalloc(sizeof(dasd_information2_t), GFP_KERNEL);
+	if (info == NULL)
 		goto out_exit;
-	if ((geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL)) == NULL)
+	geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL);
+	if (geo == NULL)
 		goto out_nogeo;
-	if ((label = kmalloc(sizeof(union label_t), GFP_KERNEL)) == NULL)
+	label = kmalloc(sizeof(union label_t), GFP_KERNEL);
+	if (label == NULL)
 		goto out_nolab;
 
-	if (ioctl_by_bdev(bdev, BIODASDINFO, (unsigned long)info) != 0 ||
+	if (ioctl_by_bdev(bdev, BIODASDINFO2, (unsigned long)info) != 0 ||
 	    ioctl_by_bdev(bdev, HDIO_GETGEO, (unsigned long)geo) != 0)
 		goto out_freeall;
 
@@ -96,84 +99,108 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
 	res = 1;
 
 	/*
-	 * Three different types: CMS1, VOL1 and LNX1/unlabeled
+	 * Three different formats: LDL, CDL and unformated disk
+	 *
+	 * identified by info->format
+	 *
+	 * unformated disks we do not have to care about
 	 */
-	if (strncmp(type, "CMS1", 4) == 0) {
-		/*
-		 * VM style CMS1 labeled disk
-		 */
-		if (label->cms.disk_offset != 0) {
-			printk("CMS1/%8s(MDSK):", name);
-			/* disk is reserved minidisk */
-			blocksize = label->cms.block_size;
-			offset = label->cms.disk_offset;
-			size = (label->cms.block_count - 1) * (blocksize >> 9);
+	if (info->format == DASD_FORMAT_LDL) {
+		if (strncmp(type, "CMS1", 4) == 0) {
+			/*
+			 * VM style CMS1 labeled disk
+			 */
+			if (label->cms.disk_offset != 0) {
+				printk("CMS1/%8s(MDSK):", name);
+				/* disk is reserved minidisk */
+				blocksize = label->cms.block_size;
+				offset = label->cms.disk_offset;
+				size = (label->cms.block_count - 1)
+					* (blocksize >> 9);
+			} else {
+				printk("CMS1/%8s:", name);
+				offset = (info->label_block + 1);
+				size = i_size >> 9;
+			}
 		} else {
-			printk("CMS1/%8s:", name);
+			/*
+			 * Old style LNX1 or unlabeled disk
+			 */
+			if (strncmp(type, "LNX1", 4) == 0)
+				printk ("LNX1/%8s:", name);
+			else
+				printk("(nonl)");
 			offset = (info->label_block + 1);
 			size = i_size >> 9;
 		}
 		put_partition(state, 1, offset*(blocksize >> 9),
-				 size-offset*(blocksize >> 9));
-	} else if ((strncmp(type, "VOL1", 4) == 0) &&
-		(!info->FBA_layout) && (!strcmp(info->type, "ECKD"))) {
+				      size-offset*(blocksize >> 9));
+	} else if (info->format == DASD_FORMAT_CDL) {
 		/*
-		 * New style VOL1 labeled disk
+		 * New style CDL formatted disk
 		 */
 		unsigned int blk;
 		int counter;
 
-		printk("VOL1/%8s:", name);
-
-		/* get block number and read then go through format1 labels */
-		blk = cchhb2blk(&label->vol.vtoc, geo) + 1;
-		counter = 0;
-		while ((data = read_dev_sector(bdev, blk*(blocksize/512),
-					       &sect)) != NULL) {
-			struct vtoc_format1_label f1;
-
-			memcpy(&f1, data, sizeof(struct vtoc_format1_label));
-			put_dev_sector(sect);
-
-			/* skip FMT4 / FMT5 / FMT7 labels */
-			if (f1.DS1FMTID == _ascebc['4']
-			    || f1.DS1FMTID == _ascebc['5']
-			    || f1.DS1FMTID == _ascebc['7']) {
-			        blk++;
-				continue;
-			}
-
-			/* only FMT1 valid at this point */
-			if (f1.DS1FMTID != _ascebc['1'])
-				break;
-
-			/* OK, we got valid partition data */
-		        offset = cchh2blk(&f1.DS1EXT1.llimit, geo);
-			size  = cchh2blk(&f1.DS1EXT1.ulimit, geo) -
-				offset + geo->sectors;
-			if (counter >= state->limit)
-				break;
-			put_partition(state, counter + 1,
-				      offset * (blocksize >> 9),
-				      size * (blocksize >> 9));
-			counter++;
-			blk++;
-		}
-		if (!data)
-		/* Are we not supposed to report this ? */
-			goto out_readerr;
-	} else {
 		/*
-		 * Old style LNX1 or unlabeled disk
+		 * check if VOL1 label is available
+		 * if not, something is wrong, skipping partition detection
 		 */
-		if (strncmp(type, "LNX1", 4) == 0)
-			printk ("LNX1/%8s:", name);
-		else
-			printk("(nonl)/%8s:", name);
-		offset = (info->label_block + 1);
-		size = i_size >> 9;
-		put_partition(state, 1, offset*(blocksize >> 9),
-			      size-offset*(blocksize >> 9));
+		if (strncmp(type, "VOL1",  4) == 0) {
+			printk("VOL1/%8s:", name);
+			/*
+			 * get block number and read then go through format1
+			 * labels
+			 */
+			blk = cchhb2blk(&label->vol.vtoc, geo) + 1;
+			counter = 0;
+			data = read_dev_sector(bdev, blk * (blocksize/512),
+					       &sect);
+			while (data != NULL) {
+				struct vtoc_format1_label f1;
+
+				memcpy(&f1, data,
+				       sizeof(struct vtoc_format1_label));
+				put_dev_sector(sect);
+
+				/* skip FMT4 / FMT5 / FMT7 labels */
+				if (f1.DS1FMTID == _ascebc['4']
+				    || f1.DS1FMTID == _ascebc['5']
+				    || f1.DS1FMTID == _ascebc['7']) {
+					blk++;
+					data = read_dev_sector(bdev, blk *
+							       (blocksize/512),
+								&sect);
+					continue;
+				}
+
+				/* only FMT1 valid at this point */
+				if (f1.DS1FMTID != _ascebc['1'])
+					break;
+
+				/* OK, we got valid partition data */
+				offset = cchh2blk(&f1.DS1EXT1.llimit, geo);
+				size  = cchh2blk(&f1.DS1EXT1.ulimit, geo) -
+					offset + geo->sectors;
+				if (counter >= state->limit)
+					break;
+				put_partition(state, counter + 1,
+					      offset * (blocksize >> 9),
+					      size * (blocksize >> 9));
+				counter++;
+				blk++;
+				data = read_dev_sector(bdev,
+						       blk * (blocksize/512),
+						       &sect);
+			}
+
+			if (!data)
+				/* Are we not supposed to report this ? */
+				goto out_readerr;
+		} else
+			printk(KERN_WARNING "Warning, expected Label VOL1 not "
+			       "found, treating as CDL formated Disk");
+
 	}
 
 	printk("\n");
diff --git a/fs/partitions/ldm.c b/fs/partitions/ldm.c
index 99873a2..e7dd1d4 100644
--- a/fs/partitions/ldm.c
+++ b/fs/partitions/ldm.c
@@ -677,15 +677,24 @@ static bool ldm_create_data_partitions (struct parsed_partitions *pp,
  * Return:  -1 Error, the calculated offset exceeded the size of the buffer
  *           n OK, a range-checked offset into buffer
  */
-static int ldm_relative (const u8 *buffer, int buflen, int base, int offset)
+static int ldm_relative(const u8 *buffer, int buflen, int base, int offset)
 {
 
 	base += offset;
-	if ((!buffer) || (offset < 0) || (base > buflen))
+	if (!buffer || offset < 0 || base > buflen) {
+		if (!buffer)
+			ldm_error("!buffer");
+		if (offset < 0)
+			ldm_error("offset (%d) < 0", offset);
+		if (base > buflen)
+			ldm_error("base (%d) > buflen (%d)", base, buflen);
 		return -1;
-	if ((base + buffer[base]) >= buflen)
+	}
+	if (base + buffer[base] >= buflen) {
+		ldm_error("base (%d) + buffer[base] (%d) >= buflen (%d)", base,
+				buffer[base], buflen);
 		return -1;
-
+	}
 	return buffer[base] + offset + 1;
 }
 
@@ -1054,60 +1063,98 @@ static bool ldm_parse_prt3(const u8 *buffer, int buflen, struct vblk *vb)
  * Return:  'true'   @vb contains a Volume VBLK
  *          'false'  @vb contents are not defined
  */
-static bool ldm_parse_vol5 (const u8 *buffer, int buflen, struct vblk *vb)
+static bool ldm_parse_vol5(const u8 *buffer, int buflen, struct vblk *vb)
 {
-	int r_objid, r_name, r_vtype, r_child, r_size, r_id1, r_id2, r_size2;
-	int r_drive, len;
+	int r_objid, r_name, r_vtype, r_disable_drive_letter, r_child, r_size;
+	int r_id1, r_id2, r_size2, r_drive, len;
 	struct vblk_volu *volu;
 
-	BUG_ON (!buffer || !vb);
-
-	r_objid  = ldm_relative (buffer, buflen, 0x18, 0);
-	r_name   = ldm_relative (buffer, buflen, 0x18, r_objid);
-	r_vtype  = ldm_relative (buffer, buflen, 0x18, r_name);
-	r_child  = ldm_relative (buffer, buflen, 0x2E, r_vtype);
-	r_size   = ldm_relative (buffer, buflen, 0x3E, r_child);
-
-	if (buffer[0x12] & VBLK_FLAG_VOLU_ID1)
-		r_id1 = ldm_relative (buffer, buflen, 0x53, r_size);
-	else
+	BUG_ON(!buffer || !vb);
+	r_objid = ldm_relative(buffer, buflen, 0x18, 0);
+	if (r_objid < 0) {
+		ldm_error("r_objid %d < 0", r_objid);
+		return false;
+	}
+	r_name = ldm_relative(buffer, buflen, 0x18, r_objid);
+	if (r_name < 0) {
+		ldm_error("r_name %d < 0", r_name);
+		return false;
+	}
+	r_vtype = ldm_relative(buffer, buflen, 0x18, r_name);
+	if (r_vtype < 0) {
+		ldm_error("r_vtype %d < 0", r_vtype);
+		return false;
+	}
+	r_disable_drive_letter = ldm_relative(buffer, buflen, 0x18, r_vtype);
+	if (r_disable_drive_letter < 0) {
+		ldm_error("r_disable_drive_letter %d < 0",
+				r_disable_drive_letter);
+		return false;
+	}
+	r_child = ldm_relative(buffer, buflen, 0x2D, r_disable_drive_letter);
+	if (r_child < 0) {
+		ldm_error("r_child %d < 0", r_child);
+		return false;
+	}
+	r_size = ldm_relative(buffer, buflen, 0x3D, r_child);
+	if (r_size < 0) {
+		ldm_error("r_size %d < 0", r_size);
+		return false;
+	}
+	if (buffer[0x12] & VBLK_FLAG_VOLU_ID1) {
+		r_id1 = ldm_relative(buffer, buflen, 0x52, r_size);
+		if (r_id1 < 0) {
+			ldm_error("r_id1 %d < 0", r_id1);
+			return false;
+		}
+	} else
 		r_id1 = r_size;
-
-	if (buffer[0x12] & VBLK_FLAG_VOLU_ID2)
-		r_id2 = ldm_relative (buffer, buflen, 0x53, r_id1);
-	else
+	if (buffer[0x12] & VBLK_FLAG_VOLU_ID2) {
+		r_id2 = ldm_relative(buffer, buflen, 0x52, r_id1);
+		if (r_id2 < 0) {
+			ldm_error("r_id2 %d < 0", r_id2);
+			return false;
+		}
+	} else
 		r_id2 = r_id1;
-
-	if (buffer[0x12] & VBLK_FLAG_VOLU_SIZE)
-		r_size2 = ldm_relative (buffer, buflen, 0x53, r_id2);
-	else
+	if (buffer[0x12] & VBLK_FLAG_VOLU_SIZE) {
+		r_size2 = ldm_relative(buffer, buflen, 0x52, r_id2);
+		if (r_size2 < 0) {
+			ldm_error("r_size2 %d < 0", r_size2);
+			return false;
+		}
+	} else
 		r_size2 = r_id2;
-
-	if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE)
-		r_drive = ldm_relative (buffer, buflen, 0x53, r_size2);
-	else
+	if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE) {
+		r_drive = ldm_relative(buffer, buflen, 0x52, r_size2);
+		if (r_drive < 0) {
+			ldm_error("r_drive %d < 0", r_drive);
+			return false;
+		}
+	} else
 		r_drive = r_size2;
-
 	len = r_drive;
-	if (len < 0)
+	if (len < 0) {
+		ldm_error("len %d < 0", len);
 		return false;
-
+	}
 	len += VBLK_SIZE_VOL5;
-	if (len != BE32 (buffer + 0x14))
+	if (len > BE32(buffer + 0x14)) {
+		ldm_error("len %d > BE32(buffer + 0x14) %d", len,
+				BE32(buffer + 0x14));
 		return false;
-
+	}
 	volu = &vb->vblk.volu;
-
-	ldm_get_vstr (buffer + 0x18 + r_name,  volu->volume_type,
-		sizeof (volu->volume_type));
-	memcpy (volu->volume_state, buffer + 0x19 + r_vtype,
-			sizeof (volu->volume_state));
-	volu->size = ldm_get_vnum (buffer + 0x3E + r_child);
-	volu->partition_type = buffer[0x42 + r_size];
-	memcpy (volu->guid, buffer + 0x43 + r_size,  sizeof (volu->guid));
+	ldm_get_vstr(buffer + 0x18 + r_name, volu->volume_type,
+			sizeof(volu->volume_type));
+	memcpy(volu->volume_state, buffer + 0x18 + r_disable_drive_letter,
+			sizeof(volu->volume_state));
+	volu->size = ldm_get_vnum(buffer + 0x3D + r_child);
+	volu->partition_type = buffer[0x41 + r_size];
+	memcpy(volu->guid, buffer + 0x42 + r_size, sizeof(volu->guid));
 	if (buffer[0x12] & VBLK_FLAG_VOLU_DRIVE) {
-		ldm_get_vstr (buffer + 0x53 + r_size,  volu->drive_hint,
-			sizeof (volu->drive_hint));
+		ldm_get_vstr(buffer + 0x52 + r_size, volu->drive_hint,
+				sizeof(volu->drive_hint));
 	}
 	return true;
 }
diff --git a/fs/partitions/ldm.h b/fs/partitions/ldm.h
index d2e6a30..80f63b5 100644
--- a/fs/partitions/ldm.h
+++ b/fs/partitions/ldm.h
@@ -68,7 +68,7 @@ struct parsed_partitions;
 #define VBLK_SIZE_DSK3		12
 #define VBLK_SIZE_DSK4		45
 #define VBLK_SIZE_PRT3		28
-#define VBLK_SIZE_VOL5		59
+#define VBLK_SIZE_VOL5		58
 
 /* component types */
 #define COMP_STRIPE		0x01		/* Stripe-set */
diff --git a/fs/pipe.c b/fs/pipe.c
index 3a89592..d007830 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -164,6 +164,20 @@ static void anon_pipe_buf_release(struct pipe_inode_info *pipe,
 		page_cache_release(page);
 }
 
+/**
+ * generic_pipe_buf_map - virtually map a pipe buffer
+ * @pipe:	the pipe that the buffer belongs to
+ * @buf:	the buffer that should be mapped
+ * @atomic:	whether to use an atomic map
+ *
+ * Description:
+ *	This function returns a kernel virtual address mapping for the
+ *	passed in @pipe_buffer. If @atomic is set, an atomic map is provided
+ *	and the caller has to be careful not to fault before calling
+ *	the unmap function.
+ *
+ *	Note that this function occupies KM_USER0 if @atomic != 0.
+ */
 void *generic_pipe_buf_map(struct pipe_inode_info *pipe,
 			   struct pipe_buffer *buf, int atomic)
 {
@@ -175,6 +189,15 @@ void *generic_pipe_buf_map(struct pipe_inode_info *pipe,
 	return kmap(buf->page);
 }
 
+/**
+ * generic_pipe_buf_unmap - unmap a previously mapped pipe buffer
+ * @pipe:	the pipe that the buffer belongs to
+ * @buf:	the buffer that should be unmapped
+ * @map_data:	the data that the mapping function returned
+ *
+ * Description:
+ *	This function undoes the mapping that ->map() provided.
+ */
 void generic_pipe_buf_unmap(struct pipe_inode_info *pipe,
 			    struct pipe_buffer *buf, void *map_data)
 {
@@ -185,11 +208,28 @@ void generic_pipe_buf_unmap(struct pipe_inode_info *pipe,
 		kunmap(buf->page);
 }
 
+/**
+ * generic_pipe_buf_steal - attempt to take ownership of a @pipe_buffer
+ * @pipe:	the pipe that the buffer belongs to
+ * @buf:	the buffer to attempt to steal
+ *
+ * Description:
+ *	This function attempts to steal the @struct page attached to
+ *	@buf. If successful, this function returns 0 and returns with
+ *	the page locked. The caller may then reuse the page for whatever
+ *	he wishes, the typical use is insertion into a different file
+ *	page cache.
+ */
 int generic_pipe_buf_steal(struct pipe_inode_info *pipe,
 			   struct pipe_buffer *buf)
 {
 	struct page *page = buf->page;
 
+	/*
+	 * A reference of one is golden, that means that the owner of this
+	 * page is the only one holding a reference to it. lock the page
+	 * and return OK.
+	 */
 	if (page_count(page) == 1) {
 		lock_page(page);
 		return 0;
@@ -198,12 +238,32 @@ int generic_pipe_buf_steal(struct pipe_inode_info *pipe,
 	return 1;
 }
 
-void generic_pipe_buf_get(struct pipe_inode_info *info, struct pipe_buffer *buf)
+/**
+ * generic_pipe_buf_get - get a reference to a @struct pipe_buffer
+ * @pipe:	the pipe that the buffer belongs to
+ * @buf:	the buffer to get a reference to
+ *
+ * Description:
+ *	This function grabs an extra reference to @buf. It's used in
+ *	in the tee() system call, when we duplicate the buffers in one
+ *	pipe into another.
+ */
+void generic_pipe_buf_get(struct pipe_inode_info *pipe, struct pipe_buffer *buf)
 {
 	page_cache_get(buf->page);
 }
 
-int generic_pipe_buf_pin(struct pipe_inode_info *info, struct pipe_buffer *buf)
+/**
+ * generic_pipe_buf_confirm - verify contents of the pipe buffer
+ * @pipe:	the pipe that the buffer belongs to
+ * @buf:	the buffer to confirm
+ *
+ * Description:
+ *	This function does nothing, because the generic pipe code uses
+ *	pages that are always good when inserted into the pipe.
+ */
+int generic_pipe_buf_confirm(struct pipe_inode_info *info,
+			     struct pipe_buffer *buf)
 {
 	return 0;
 }
@@ -212,7 +272,7 @@ static const struct pipe_buf_operations anon_pipe_buf_ops = {
 	.can_merge = 1,
 	.map = generic_pipe_buf_map,
 	.unmap = generic_pipe_buf_unmap,
-	.pin = generic_pipe_buf_pin,
+	.confirm = generic_pipe_buf_confirm,
 	.release = anon_pipe_buf_release,
 	.steal = generic_pipe_buf_steal,
 	.get = generic_pipe_buf_get,
@@ -252,7 +312,7 @@ pipe_read(struct kiocb *iocb, const struct iovec *_iov,
 			if (chars > total_len)
 				chars = total_len;
 
-			error = ops->pin(pipe, buf);
+			error = ops->confirm(pipe, buf);
 			if (error) {
 				if (!ret)
 					error = ret;
@@ -373,7 +433,7 @@ pipe_write(struct kiocb *iocb, const struct iovec *_iov,
 			int error, atomic = 1;
 			void *addr;
 
-			error = ops->pin(pipe, buf);
+			error = ops->confirm(pipe, buf);
 			if (error)
 				goto out;
 
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 74f30e0..965625a 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -62,6 +62,8 @@
 #include <linux/mman.h>
 #include <linux/proc_fs.h>
 #include <linux/ioport.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
 #include <linux/mm.h>
 #include <linux/hugetlb.h>
 #include <linux/pagemap.h>
@@ -76,9 +78,7 @@
 #include <linux/rcupdate.h>
 #include <linux/delayacct.h>
 
-#include <asm/uaccess.h>
 #include <asm/pgtable.h>
-#include <asm/io.h>
 #include <asm/processor.h>
 #include "internal.h"
 
@@ -87,10 +87,10 @@
 do { memcpy(buffer, string, strlen(string)); \
      buffer += strlen(string); } while (0)
 
-static inline char * task_name(struct task_struct *p, char * buf)
+static inline char *task_name(struct task_struct *p, char *buf)
 {
 	int i;
-	char * name;
+	char *name;
 	char tcomm[sizeof(p->comm)];
 
 	get_task_comm(tcomm, p);
@@ -138,7 +138,7 @@ static const char *task_state_array[] = {
 	"X (dead)"		/* 32 */
 };
 
-static inline const char * get_task_state(struct task_struct *tsk)
+static inline const char *get_task_state(struct task_struct *tsk)
 {
 	unsigned int state = (tsk->state & (TASK_RUNNING |
 					    TASK_INTERRUPTIBLE |
@@ -156,7 +156,7 @@ static inline const char * get_task_state(struct task_struct *tsk)
 	return *p;
 }
 
-static inline char * task_state(struct task_struct *p, char *buffer)
+static inline char *task_state(struct task_struct *p, char *buffer)
 {
 	struct group_info *group_info;
 	int g;
@@ -165,7 +165,6 @@ static inline char * task_state(struct task_struct *p, char *buffer)
 	rcu_read_lock();
 	buffer += sprintf(buffer,
 		"State:\t%s\n"
-		"SleepAVG:\t%lu%%\n"
 		"Tgid:\t%d\n"
 		"Pid:\t%d\n"
 		"PPid:\t%d\n"
@@ -173,9 +172,8 @@ static inline char * task_state(struct task_struct *p, char *buffer)
 		"Uid:\t%d\t%d\t%d\t%d\n"
 		"Gid:\t%d\t%d\t%d\t%d\n",
 		get_task_state(p),
-		(p->sleep_avg/1024)*100/(1020000000/1024),
-	       	p->tgid, p->pid,
-	       	pid_alive(p) ? rcu_dereference(p->real_parent)->tgid : 0,
+		p->tgid, p->pid,
+		pid_alive(p) ? rcu_dereference(p->real_parent)->tgid : 0,
 		pid_alive(p) && p->ptrace ? rcu_dereference(p->parent)->pid : 0,
 		p->uid, p->euid, p->suid, p->fsuid,
 		p->gid, p->egid, p->sgid, p->fsgid);
@@ -193,15 +191,15 @@ static inline char * task_state(struct task_struct *p, char *buffer)
 	get_group_info(group_info);
 	task_unlock(p);
 
-	for (g = 0; g < min(group_info->ngroups,NGROUPS_SMALL); g++)
-		buffer += sprintf(buffer, "%d ", GROUP_AT(group_info,g));
+	for (g = 0; g < min(group_info->ngroups, NGROUPS_SMALL); g++)
+		buffer += sprintf(buffer, "%d ", GROUP_AT(group_info, g));
 	put_group_info(group_info);
 
 	buffer += sprintf(buffer, "\n");
 	return buffer;
 }
 
-static char * render_sigset_t(const char *header, sigset_t *set, char *buffer)
+static char *render_sigset_t(const char *header, sigset_t *set, char *buffer)
 {
 	int i, len;
 
@@ -241,7 +239,7 @@ static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
 	}
 }
 
-static inline char * task_sig(struct task_struct *p, char *buffer)
+static inline char *task_sig(struct task_struct *p, char *buffer)
 {
 	unsigned long flags;
 	sigset_t pending, shpending, blocked, ignored, caught;
@@ -291,14 +289,23 @@ static inline char *task_cap(struct task_struct *p, char *buffer)
 			    cap_t(p->cap_effective));
 }
 
-int proc_pid_status(struct task_struct *task, char * buffer)
+static inline char *task_context_switch_counts(struct task_struct *p,
+						char *buffer)
 {
-	char * orig = buffer;
+	return buffer + sprintf(buffer, "voluntary_ctxt_switches:\t%lu\n"
+			    "nonvoluntary_ctxt_switches:\t%lu\n",
+			    p->nvcsw,
+			    p->nivcsw);
+}
+
+int proc_pid_status(struct task_struct *task, char *buffer)
+{
+	char *orig = buffer;
 	struct mm_struct *mm = get_task_mm(task);
 
 	buffer = task_name(task, buffer);
 	buffer = task_state(task, buffer);
- 
+
 	if (mm) {
 		buffer = task_mem(mm, buffer);
 		mmput(mm);
@@ -309,10 +316,45 @@ int proc_pid_status(struct task_struct *task, char * buffer)
 #if defined(CONFIG_S390)
 	buffer = task_show_regs(task, buffer);
 #endif
+	buffer = task_context_switch_counts(task, buffer);
 	return buffer - orig;
 }
 
-static int do_task_stat(struct task_struct *task, char * buffer, int whole)
+static clock_t task_utime(struct task_struct *p)
+{
+	clock_t utime = cputime_to_clock_t(p->utime),
+		total = utime + cputime_to_clock_t(p->stime);
+	u64 temp;
+
+	/*
+	 * Use CFS's precise accounting:
+	 */
+	temp = (u64)nsec_to_clock_t(p->se.sum_exec_runtime);
+
+	if (total) {
+		temp *= utime;
+		do_div(temp, total);
+	}
+	utime = (clock_t)temp;
+
+	return utime;
+}
+
+static clock_t task_stime(struct task_struct *p)
+{
+	clock_t stime;
+
+	/*
+	 * Use CFS's precise accounting. (we subtract utime from
+	 * the total, to make sure the total observed by userspace
+	 * grows monotonically - apps rely on that):
+	 */
+	stime = nsec_to_clock_t(p->se.sum_exec_runtime) - task_utime(p);
+
+	return stime;
+}
+
+static int do_task_stat(struct task_struct *task, char *buffer, int whole)
 {
 	unsigned long vsize, eip, esp, wchan = ~0UL;
 	long priority, nice;
@@ -320,13 +362,14 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
 	sigset_t sigign, sigcatch;
 	char state;
 	int res;
- 	pid_t ppid = 0, pgid = -1, sid = -1;
+	pid_t ppid = 0, pgid = -1, sid = -1;
 	int num_threads = 0;
 	struct mm_struct *mm;
 	unsigned long long start_time;
 	unsigned long cmin_flt = 0, cmaj_flt = 0;
 	unsigned long  min_flt = 0,  maj_flt = 0;
-	cputime_t cutime, cstime, utime, stime;
+	cputime_t cutime, cstime;
+	clock_t utime, stime;
 	unsigned long rsslim = 0;
 	char tcomm[sizeof(task->comm)];
 	unsigned long flags;
@@ -344,7 +387,8 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
 
 	sigemptyset(&sigign);
 	sigemptyset(&sigcatch);
-	cutime = cstime = utime = stime = cputime_zero;
+	cutime = cstime = cputime_zero;
+	utime = stime = 0;
 
 	rcu_read_lock();
 	if (lock_task_sighand(task, &flags)) {
@@ -370,15 +414,15 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
 			do {
 				min_flt += t->min_flt;
 				maj_flt += t->maj_flt;
-				utime = cputime_add(utime, t->utime);
-				stime = cputime_add(stime, t->stime);
+				utime += task_utime(t);
+				stime += task_stime(t);
 				t = next_thread(t);
 			} while (t != task);
 
 			min_flt += sig->min_flt;
 			maj_flt += sig->maj_flt;
-			utime = cputime_add(utime, sig->utime);
-			stime = cputime_add(stime, sig->stime);
+			utime += cputime_to_clock_t(sig->utime);
+			stime += cputime_to_clock_t(sig->stime);
 		}
 
 		sid = signal_session(sig);
@@ -389,13 +433,13 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
 	}
 	rcu_read_unlock();
 
-	if (!whole || num_threads<2)
+	if (!whole || num_threads < 2)
 		wchan = get_wchan(task);
 	if (!whole) {
 		min_flt = task->min_flt;
 		maj_flt = task->maj_flt;
-		utime = task->utime;
-		stime = task->stime;
+		utime = task_utime(task);
+		stime = task_stime(task);
 	}
 
 	/* scale priority and nice values from timeslices to -20..20 */
@@ -405,12 +449,13 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
 
 	/* Temporary variable needed for gcc-2.96 */
 	/* convert timespec -> nsec*/
-	start_time = (unsigned long long)task->start_time.tv_sec * NSEC_PER_SEC
-				+ task->start_time.tv_nsec;
+	start_time =
+		(unsigned long long)task->real_start_time.tv_sec * NSEC_PER_SEC
+				+ task->real_start_time.tv_nsec;
 	/* convert nsec -> ticks */
 	start_time = nsec_to_clock_t(start_time);
 
-	res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %u %lu \
+	res = sprintf(buffer, "%d (%s) %c %d %d %d %d %d %u %lu \
 %lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
 %lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu\n",
 		task->pid,
@@ -426,8 +471,8 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
 		cmin_flt,
 		maj_flt,
 		cmaj_flt,
-		cputime_to_clock_t(utime),
-		cputime_to_clock_t(stime),
+		utime,
+		stime,
 		cputime_to_clock_t(cutime),
 		cputime_to_clock_t(cstime),
 		priority,
@@ -436,7 +481,7 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
 		start_time,
 		vsize,
 		mm ? get_mm_rss(mm) : 0,
-	        rsslim,
+		rsslim,
 		mm ? mm->start_code : 0,
 		mm ? mm->end_code : 0,
 		mm ? mm->start_stack : 0,
@@ -458,17 +503,17 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
 		task->rt_priority,
 		task->policy,
 		(unsigned long long)delayacct_blkio_ticks(task));
-	if(mm)
+	if (mm)
 		mmput(mm);
 	return res;
 }
 
-int proc_tid_stat(struct task_struct *task, char * buffer)
+int proc_tid_stat(struct task_struct *task, char *buffer)
 {
 	return do_task_stat(task, buffer, 0);
 }
 
-int proc_tgid_stat(struct task_struct *task, char * buffer)
+int proc_tgid_stat(struct task_struct *task, char *buffer)
 {
 	return do_task_stat(task, buffer, 1);
 }
@@ -477,12 +522,12 @@ int proc_pid_statm(struct task_struct *task, char *buffer)
 {
 	int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
 	struct mm_struct *mm = get_task_mm(task);
-	
+
 	if (mm) {
 		size = task_statm(mm, &shared, &text, &data, &resident);
 		mmput(mm);
 	}
 
-	return sprintf(buffer,"%d %d %d %d %d %d %d\n",
+	return sprintf(buffer, "%d %d %d %d %d %d %d\n",
 		       size, resident, shared, text, lib, data, 0);
 }
diff --git a/fs/proc/base.c b/fs/proc/base.c
index a5fa1fd..42cb4f5 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -67,7 +67,6 @@
 #include <linux/mount.h>
 #include <linux/security.h>
 #include <linux/ptrace.h>
-#include <linux/seccomp.h>
 #include <linux/cpuset.h>
 #include <linux/audit.h>
 #include <linux/poll.h>
@@ -204,12 +203,17 @@ static int proc_pid_environ(struct task_struct *task, char * buffer)
 	int res = 0;
 	struct mm_struct *mm = get_task_mm(task);
 	if (mm) {
-		unsigned int len = mm->env_end - mm->env_start;
+		unsigned int len;
+
+		res = -ESRCH;
+		if (!ptrace_may_attach(task))
+			goto out;
+
+		len  = mm->env_end - mm->env_start;
 		if (len > PAGE_SIZE)
 			len = PAGE_SIZE;
 		res = access_process_vm(task, mm->env_start, buffer, len, 0);
-		if (!ptrace_may_attach(task))
-			res = -ESRCH;
+out:
 		mmput(mm);
 	}
 	return res;
@@ -279,7 +283,7 @@ static int proc_pid_auxv(struct task_struct *task, char *buffer)
 static int proc_pid_wchan(struct task_struct *task, char *buffer)
 {
 	unsigned long wchan;
-	char symname[KSYM_NAME_LEN+1];
+	char symname[KSYM_NAME_LEN];
 
 	wchan = get_wchan(task);
 
@@ -296,7 +300,7 @@ static int proc_pid_wchan(struct task_struct *task, char *buffer)
  */
 static int proc_pid_schedstat(struct task_struct *task, char *buffer)
 {
-	return sprintf(buffer, "%lu %lu %lu\n",
+	return sprintf(buffer, "%llu %llu %lu\n",
 			task->sched_info.cpu_time,
 			task->sched_info.run_delay,
 			task->sched_info.pcnt);
@@ -812,71 +816,6 @@ static const struct file_operations proc_loginuid_operations = {
 };
 #endif
 
-#ifdef CONFIG_SECCOMP
-static ssize_t seccomp_read(struct file *file, char __user *buf,
-			    size_t count, loff_t *ppos)
-{
-	struct task_struct *tsk = get_proc_task(file->f_dentry->d_inode);
-	char __buf[20];
-	size_t len;
-
-	if (!tsk)
-		return -ESRCH;
-	/* no need to print the trailing zero, so use only len */
-	len = sprintf(__buf, "%u\n", tsk->seccomp.mode);
-	put_task_struct(tsk);
-
-	return simple_read_from_buffer(buf, count, ppos, __buf, len);
-}
-
-static ssize_t seccomp_write(struct file *file, const char __user *buf,
-			     size_t count, loff_t *ppos)
-{
-	struct task_struct *tsk = get_proc_task(file->f_dentry->d_inode);
-	char __buf[20], *end;
-	unsigned int seccomp_mode;
-	ssize_t result;
-
-	result = -ESRCH;
-	if (!tsk)
-		goto out_no_task;
-
-	/* can set it only once to be even more secure */
-	result = -EPERM;
-	if (unlikely(tsk->seccomp.mode))
-		goto out;
-
-	result = -EFAULT;
-	memset(__buf, 0, sizeof(__buf));
-	count = min(count, sizeof(__buf) - 1);
-	if (copy_from_user(__buf, buf, count))
-		goto out;
-
-	seccomp_mode = simple_strtoul(__buf, &end, 0);
-	if (*end == '\n')
-		end++;
-	result = -EINVAL;
-	if (seccomp_mode && seccomp_mode <= NR_SECCOMP_MODES) {
-		tsk->seccomp.mode = seccomp_mode;
-		set_tsk_thread_flag(tsk, TIF_SECCOMP);
-	} else
-		goto out;
-	result = -EIO;
-	if (unlikely(!(end - __buf)))
-		goto out;
-	result = end - __buf;
-out:
-	put_task_struct(tsk);
-out_no_task:
-	return result;
-}
-
-static const struct file_operations proc_seccomp_operations = {
-	.read		= seccomp_read,
-	.write		= seccomp_write,
-};
-#endif /* CONFIG_SECCOMP */
-
 #ifdef CONFIG_FAULT_INJECTION
 static ssize_t proc_fault_inject_read(struct file * file, char __user * buf,
 				      size_t count, loff_t *ppos)
@@ -929,6 +868,69 @@ static const struct file_operations proc_fault_inject_operations = {
 };
 #endif
 
+#ifdef CONFIG_SCHED_DEBUG
+/*
+ * Print out various scheduling related per-task fields:
+ */
+static int sched_show(struct seq_file *m, void *v)
+{
+	struct inode *inode = m->private;
+	struct task_struct *p;
+
+	WARN_ON(!inode);
+
+	p = get_proc_task(inode);
+	if (!p)
+		return -ESRCH;
+	proc_sched_show_task(p, m);
+
+	put_task_struct(p);
+
+	return 0;
+}
+
+static ssize_t
+sched_write(struct file *file, const char __user *buf,
+	    size_t count, loff_t *offset)
+{
+	struct inode *inode = file->f_path.dentry->d_inode;
+	struct task_struct *p;
+
+	WARN_ON(!inode);
+
+	p = get_proc_task(inode);
+	if (!p)
+		return -ESRCH;
+	proc_sched_set_task(p);
+
+	put_task_struct(p);
+
+	return count;
+}
+
+static int sched_open(struct inode *inode, struct file *filp)
+{
+	int ret;
+
+	ret = single_open(filp, sched_show, NULL);
+	if (!ret) {
+		struct seq_file *m = filp->private_data;
+
+		m->private = inode;
+	}
+	return ret;
+}
+
+static const struct file_operations proc_pid_sched_operations = {
+	.open		= sched_open,
+	.read		= seq_read,
+	.write		= sched_write,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
+#endif
+
 static void *proc_pid_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
 	struct inode *inode = dentry->d_inode;
@@ -1963,6 +1965,9 @@ static const struct pid_entry tgid_base_stuff[] = {
 	INF("environ",    S_IRUSR, pid_environ),
 	INF("auxv",       S_IRUSR, pid_auxv),
 	INF("status",     S_IRUGO, pid_status),
+#ifdef CONFIG_SCHED_DEBUG
+	REG("sched",      S_IRUGO|S_IWUSR, pid_sched),
+#endif
 	INF("cmdline",    S_IRUGO, pid_cmdline),
 	INF("stat",       S_IRUGO, tgid_stat),
 	INF("statm",      S_IRUGO, pid_statm),
@@ -1971,9 +1976,6 @@ static const struct pid_entry tgid_base_stuff[] = {
 	REG("numa_maps",  S_IRUGO, numa_maps),
 #endif
 	REG("mem",        S_IRUSR|S_IWUSR, mem),
-#ifdef CONFIG_SECCOMP
-	REG("seccomp",    S_IRUSR|S_IWUSR, seccomp),
-#endif
 	LNK("cwd",        cwd),
 	LNK("root",       root),
 	LNK("exe",        exe),
@@ -2247,6 +2249,9 @@ static const struct pid_entry tid_base_stuff[] = {
 	INF("environ",   S_IRUSR, pid_environ),
 	INF("auxv",      S_IRUSR, pid_auxv),
 	INF("status",    S_IRUGO, pid_status),
+#ifdef CONFIG_SCHED_DEBUG
+	REG("sched",     S_IRUGO|S_IWUSR, pid_sched),
+#endif
 	INF("cmdline",   S_IRUGO, pid_cmdline),
 	INF("stat",      S_IRUGO, tid_stat),
 	INF("statm",     S_IRUGO, pid_statm),
@@ -2255,9 +2260,6 @@ static const struct pid_entry tid_base_stuff[] = {
 	REG("numa_maps", S_IRUGO, numa_maps),
 #endif
 	REG("mem",       S_IRUSR|S_IWUSR, mem),
-#ifdef CONFIG_SECCOMP
-	REG("seccomp",   S_IRUSR|S_IWUSR, seccomp),
-#endif
 	LNK("cwd",       cwd),
 	LNK("root",      root),
 	LNK("exe",       exe),
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 8a40e15..b5e7155 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -20,6 +20,7 @@
 #include <linux/namei.h>
 #include <linux/bitops.h>
 #include <linux/spinlock.h>
+#include <linux/completion.h>
 #include <asm/uaccess.h>
 
 #include "internal.h"
@@ -529,12 +530,6 @@ static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp
 		return -EAGAIN;
 	dp->low_ino = i;
 
-	spin_lock(&proc_subdir_lock);
-	dp->next = dir->subdir;
-	dp->parent = dir;
-	dir->subdir = dp;
-	spin_unlock(&proc_subdir_lock);
-
 	if (S_ISDIR(dp->mode)) {
 		if (dp->proc_iops == NULL) {
 			dp->proc_fops = &proc_dir_operations;
@@ -550,6 +545,13 @@ static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp
 		if (dp->proc_iops == NULL)
 			dp->proc_iops = &proc_file_inode_operations;
 	}
+
+	spin_lock(&proc_subdir_lock);
+	dp->next = dir->subdir;
+	dp->parent = dir;
+	dir->subdir = dp;
+	spin_unlock(&proc_subdir_lock);
+
 	return 0;
 }
 
@@ -613,6 +615,9 @@ static struct proc_dir_entry *proc_create(struct proc_dir_entry **parent,
 	ent->namelen = len;
 	ent->mode = mode;
 	ent->nlink = nlink;
+	ent->pde_users = 0;
+	spin_lock_init(&ent->pde_unload_lock);
+	ent->pde_unload_completion = NULL;
  out:
 	return ent;
 }
@@ -649,9 +654,6 @@ struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
 
 	ent = proc_create(&parent, name, S_IFDIR | mode, 2);
 	if (ent) {
-		ent->proc_fops = &proc_dir_operations;
-		ent->proc_iops = &proc_dir_inode_operations;
-
 		if (proc_register(parent, ent) < 0) {
 			kfree(ent);
 			ent = NULL;
@@ -686,10 +688,6 @@ struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
 
 	ent = proc_create(&parent,name,mode,nlink);
 	if (ent) {
-		if (S_ISDIR(mode)) {
-			ent->proc_fops = &proc_dir_operations;
-			ent->proc_iops = &proc_dir_inode_operations;
-		}
 		if (proc_register(parent, ent) < 0) {
 			kfree(ent);
 			ent = NULL;
@@ -734,9 +732,35 @@ void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
 		de = *p;
 		*p = de->next;
 		de->next = NULL;
+
+		spin_lock(&de->pde_unload_lock);
+		/*
+		 * Stop accepting new callers into module. If you're
+		 * dynamically allocating ->proc_fops, save a pointer somewhere.
+		 */
+		de->proc_fops = NULL;
+		/* Wait until all existing callers into module are done. */
+		if (de->pde_users > 0) {
+			DECLARE_COMPLETION_ONSTACK(c);
+
+			if (!de->pde_unload_completion)
+				de->pde_unload_completion = &c;
+
+			spin_unlock(&de->pde_unload_lock);
+			spin_unlock(&proc_subdir_lock);
+
+			wait_for_completion(de->pde_unload_completion);
+
+			spin_lock(&proc_subdir_lock);
+			goto continue_removing;
+		}
+		spin_unlock(&de->pde_unload_lock);
+
+continue_removing:
 		if (S_ISDIR(de->mode))
 			parent->nlink--;
-		proc_kill_inodes(de);
+		if (!S_ISREG(de->mode))
+			proc_kill_inodes(de);
 		de->nlink = 0;
 		WARN_ON(de->subdir);
 		if (!atomic_read(&de->count))
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index d5ce65c..dd28e86 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -10,6 +10,7 @@
 #include <linux/mm.h>
 #include <linux/string.h>
 #include <linux/stat.h>
+#include <linux/completion.h>
 #include <linux/file.h>
 #include <linux/limits.h>
 #include <linux/init.h>
@@ -140,6 +141,251 @@ static const struct super_operations proc_sops = {
 	.remount_fs	= proc_remount,
 };
 
+static void pde_users_dec(struct proc_dir_entry *pde)
+{
+	spin_lock(&pde->pde_unload_lock);
+	pde->pde_users--;
+	if (pde->pde_unload_completion && pde->pde_users == 0)
+		complete(pde->pde_unload_completion);
+	spin_unlock(&pde->pde_unload_lock);
+}
+
+static loff_t proc_reg_llseek(struct file *file, loff_t offset, int whence)
+{
+	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	loff_t rv = -EINVAL;
+	loff_t (*llseek)(struct file *, loff_t, int);
+
+	spin_lock(&pde->pde_unload_lock);
+	/*
+	 * remove_proc_entry() is going to delete PDE (as part of module
+	 * cleanup sequence). No new callers into module allowed.
+	 */
+	if (!pde->proc_fops) {
+		spin_unlock(&pde->pde_unload_lock);
+		return rv;
+	}
+	/*
+	 * Bump refcount so that remove_proc_entry will wail for ->llseek to
+	 * complete.
+	 */
+	pde->pde_users++;
+	/*
+	 * Save function pointer under lock, to protect against ->proc_fops
+	 * NULL'ifying right after ->pde_unload_lock is dropped.
+	 */
+	llseek = pde->proc_fops->llseek;
+	spin_unlock(&pde->pde_unload_lock);
+
+	if (!llseek)
+		llseek = default_llseek;
+	rv = llseek(file, offset, whence);
+
+	pde_users_dec(pde);
+	return rv;
+}
+
+static ssize_t proc_reg_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
+{
+	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	ssize_t rv = -EIO;
+	ssize_t (*read)(struct file *, char __user *, size_t, loff_t *);
+
+	spin_lock(&pde->pde_unload_lock);
+	if (!pde->proc_fops) {
+		spin_unlock(&pde->pde_unload_lock);
+		return rv;
+	}
+	pde->pde_users++;
+	read = pde->proc_fops->read;
+	spin_unlock(&pde->pde_unload_lock);
+
+	if (read)
+		rv = read(file, buf, count, ppos);
+
+	pde_users_dec(pde);
+	return rv;
+}
+
+static ssize_t proc_reg_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+{
+	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	ssize_t rv = -EIO;
+	ssize_t (*write)(struct file *, const char __user *, size_t, loff_t *);
+
+	spin_lock(&pde->pde_unload_lock);
+	if (!pde->proc_fops) {
+		spin_unlock(&pde->pde_unload_lock);
+		return rv;
+	}
+	pde->pde_users++;
+	write = pde->proc_fops->write;
+	spin_unlock(&pde->pde_unload_lock);
+
+	if (write)
+		rv = write(file, buf, count, ppos);
+
+	pde_users_dec(pde);
+	return rv;
+}
+
+static unsigned int proc_reg_poll(struct file *file, struct poll_table_struct *pts)
+{
+	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	unsigned int rv = 0;
+	unsigned int (*poll)(struct file *, struct poll_table_struct *);
+
+	spin_lock(&pde->pde_unload_lock);
+	if (!pde->proc_fops) {
+		spin_unlock(&pde->pde_unload_lock);
+		return rv;
+	}
+	pde->pde_users++;
+	poll = pde->proc_fops->poll;
+	spin_unlock(&pde->pde_unload_lock);
+
+	if (poll)
+		rv = poll(file, pts);
+
+	pde_users_dec(pde);
+	return rv;
+}
+
+static long proc_reg_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	long rv = -ENOTTY;
+	long (*unlocked_ioctl)(struct file *, unsigned int, unsigned long);
+	int (*ioctl)(struct inode *, struct file *, unsigned int, unsigned long);
+
+	spin_lock(&pde->pde_unload_lock);
+	if (!pde->proc_fops) {
+		spin_unlock(&pde->pde_unload_lock);
+		return rv;
+	}
+	pde->pde_users++;
+	unlocked_ioctl = pde->proc_fops->unlocked_ioctl;
+	ioctl = pde->proc_fops->ioctl;
+	spin_unlock(&pde->pde_unload_lock);
+
+	if (unlocked_ioctl) {
+		rv = unlocked_ioctl(file, cmd, arg);
+		if (rv == -ENOIOCTLCMD)
+			rv = -EINVAL;
+	} else if (ioctl) {
+		lock_kernel();
+		rv = ioctl(file->f_path.dentry->d_inode, file, cmd, arg);
+		unlock_kernel();
+	}
+
+	pde_users_dec(pde);
+	return rv;
+}
+
+#ifdef CONFIG_COMPAT
+static long proc_reg_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	long rv = -ENOTTY;
+	long (*compat_ioctl)(struct file *, unsigned int, unsigned long);
+
+	spin_lock(&pde->pde_unload_lock);
+	if (!pde->proc_fops) {
+		spin_unlock(&pde->pde_unload_lock);
+		return rv;
+	}
+	pde->pde_users++;
+	compat_ioctl = pde->proc_fops->compat_ioctl;
+	spin_unlock(&pde->pde_unload_lock);
+
+	if (compat_ioctl)
+		rv = compat_ioctl(file, cmd, arg);
+
+	pde_users_dec(pde);
+	return rv;
+}
+#endif
+
+static int proc_reg_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+	int rv = -EIO;
+	int (*mmap)(struct file *, struct vm_area_struct *);
+
+	spin_lock(&pde->pde_unload_lock);
+	if (!pde->proc_fops) {
+		spin_unlock(&pde->pde_unload_lock);
+		return rv;
+	}
+	pde->pde_users++;
+	mmap = pde->proc_fops->mmap;
+	spin_unlock(&pde->pde_unload_lock);
+
+	if (mmap)
+		rv = mmap(file, vma);
+
+	pde_users_dec(pde);
+	return rv;
+}
+
+static int proc_reg_open(struct inode *inode, struct file *file)
+{
+	struct proc_dir_entry *pde = PDE(inode);
+	int rv = 0;
+	int (*open)(struct inode *, struct file *);
+
+	spin_lock(&pde->pde_unload_lock);
+	if (!pde->proc_fops) {
+		spin_unlock(&pde->pde_unload_lock);
+		return rv;
+	}
+	pde->pde_users++;
+	open = pde->proc_fops->open;
+	spin_unlock(&pde->pde_unload_lock);
+
+	if (open)
+		rv = open(inode, file);
+
+	pde_users_dec(pde);
+	return rv;
+}
+
+static int proc_reg_release(struct inode *inode, struct file *file)
+{
+	struct proc_dir_entry *pde = PDE(inode);
+	int rv = 0;
+	int (*release)(struct inode *, struct file *);
+
+	spin_lock(&pde->pde_unload_lock);
+	if (!pde->proc_fops) {
+		spin_unlock(&pde->pde_unload_lock);
+		return rv;
+	}
+	pde->pde_users++;
+	release = pde->proc_fops->release;
+	spin_unlock(&pde->pde_unload_lock);
+
+	if (release)
+		rv = release(inode, file);
+
+	pde_users_dec(pde);
+	return rv;
+}
+
+static const struct file_operations proc_reg_file_ops = {
+	.llseek		= proc_reg_llseek,
+	.read		= proc_reg_read,
+	.write		= proc_reg_write,
+	.poll		= proc_reg_poll,
+	.unlocked_ioctl	= proc_reg_unlocked_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= proc_reg_compat_ioctl,
+#endif
+	.mmap		= proc_reg_mmap,
+	.open		= proc_reg_open,
+	.release	= proc_reg_release,
+};
+
 struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
 				struct proc_dir_entry *de)
 {
@@ -166,8 +412,12 @@ struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
 			inode->i_nlink = de->nlink;
 		if (de->proc_iops)
 			inode->i_op = de->proc_iops;
-		if (de->proc_fops)
-			inode->i_fop = de->proc_fops;
+		if (de->proc_fops) {
+			if (S_ISREG(inode->i_mode))
+				inode->i_fop = &proc_reg_file_ops;
+			else
+				inode->i_fop = de->proc_fops;
+		}
 	}
 
 	return inode;
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 5fd49e4..d24b8d4 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -105,6 +105,7 @@ static int uptime_read_proc(char *page, char **start, off_t off,
 	cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
 
 	do_posix_clock_monotonic_gettime(&uptime);
+	monotonic_to_bootbased(&uptime);
 	cputime_to_timespec(idletime, &idle);
 	len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
 			(unsigned long) uptime.tv_sec,
@@ -443,12 +444,12 @@ static int show_stat(struct seq_file *p, void *v)
 	unsigned long jif;
 	cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
 	u64 sum = 0;
+	struct timespec boottime;
 
 	user = nice = system = idle = iowait =
 		irq = softirq = steal = cputime64_zero;
-	jif = - wall_to_monotonic.tv_sec;
-	if (wall_to_monotonic.tv_nsec)
-		--jif;
+	getboottime(&boottime);
+	jif = boottime.tv_sec;
 
 	for_each_possible_cpu(i) {
 		int j;
diff --git a/fs/proc/proc_tty.c b/fs/proc/proc_tty.c
index b3a473b..2284622 100644
--- a/fs/proc/proc_tty.c
+++ b/fs/proc/proc_tty.c
@@ -69,7 +69,7 @@ static void show_tty_range(struct seq_file *m, struct tty_driver *p,
 
 static int show_tty_driver(struct seq_file *m, void *v)
 {
-	struct tty_driver *p = v;
+	struct tty_driver *p = list_entry(v, struct tty_driver, tty_drivers);
 	dev_t from = MKDEV(p->major, p->minor_start);
 	dev_t to = from + p->num;
 
@@ -106,22 +106,13 @@ static int show_tty_driver(struct seq_file *m, void *v)
 /* iterator */
 static void *t_start(struct seq_file *m, loff_t *pos)
 {
-	struct list_head *p;
-	loff_t l = *pos;
-
 	mutex_lock(&tty_mutex);
-	list_for_each(p, &tty_drivers)
-		if (!l--)
-			return list_entry(p, struct tty_driver, tty_drivers);
-	return NULL;
+	return seq_list_start(&tty_drivers, *pos);
 }
 
 static void *t_next(struct seq_file *m, void *v, loff_t *pos)
 {
-	struct list_head *p = ((struct tty_driver *)v)->tty_drivers.next;
-	(*pos)++;
-	return p==&tty_drivers ? NULL :
-			list_entry(p, struct tty_driver, tty_drivers);
+	return seq_list_next(v, &tty_drivers, pos);
 }
 
 static void t_stop(struct seq_file *m, void *v)
diff --git a/fs/qnx4/file.c b/fs/qnx4/file.c
index 4464998..867f42b 100644
--- a/fs/qnx4/file.c
+++ b/fs/qnx4/file.c
@@ -25,7 +25,7 @@ const struct file_operations qnx4_file_operations =
 	.read		= do_sync_read,
 	.aio_read	= generic_file_aio_read,
 	.mmap		= generic_file_mmap,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 #ifdef CONFIG_QNX4FS_RW
 	.write		= do_sync_write,
 	.aio_write	= generic_file_aio_write,
diff --git a/fs/quota.c b/fs/quota.c
index 9f237d6..e6577ac 100644
--- a/fs/quota.c
+++ b/fs/quota.c
@@ -10,12 +10,14 @@
 #include <linux/slab.h>
 #include <asm/current.h>
 #include <asm/uaccess.h>
+#include <linux/compat.h>
 #include <linux/kernel.h>
 #include <linux/security.h>
 #include <linux/syscalls.h>
 #include <linux/buffer_head.h>
 #include <linux/capability.h>
 #include <linux/quotaops.h>
+#include <linux/types.h>
 
 /* Check validity of generic quotactl commands */
 static int generic_quotactl_valid(struct super_block *sb, int type, int cmd, qid_t id)
@@ -384,3 +386,119 @@ asmlinkage long sys_quotactl(unsigned int cmd, const char __user *special, qid_t
 
 	return ret;
 }
+
+#if defined(CONFIG_X86_64) || defined(CONFIG_IA64)
+/*
+ * This code works only for 32 bit quota tools over 64 bit OS (x86_64, ia64)
+ * and is necessary due to alignment problems.
+ */
+struct compat_if_dqblk {
+	compat_u64 dqb_bhardlimit;
+	compat_u64 dqb_bsoftlimit;
+	compat_u64 dqb_curspace;
+	compat_u64 dqb_ihardlimit;
+	compat_u64 dqb_isoftlimit;
+	compat_u64 dqb_curinodes;
+	compat_u64 dqb_btime;
+	compat_u64 dqb_itime;
+	compat_uint_t dqb_valid;
+};
+
+/* XFS structures */
+struct compat_fs_qfilestat {
+	compat_u64 dqb_bhardlimit;
+	compat_u64 qfs_nblks;
+	compat_uint_t qfs_nextents;
+};
+
+struct compat_fs_quota_stat {
+	__s8		qs_version;
+	__u16		qs_flags;
+	__s8		qs_pad;
+	struct compat_fs_qfilestat	qs_uquota;
+	struct compat_fs_qfilestat	qs_gquota;
+	compat_uint_t	qs_incoredqs;
+	compat_int_t	qs_btimelimit;
+	compat_int_t	qs_itimelimit;
+	compat_int_t	qs_rtbtimelimit;
+	__u16		qs_bwarnlimit;
+	__u16		qs_iwarnlimit;
+};
+
+asmlinkage long sys32_quotactl(unsigned int cmd, const char __user *special,
+						qid_t id, void __user *addr)
+{
+	unsigned int cmds;
+	struct if_dqblk __user *dqblk;
+	struct compat_if_dqblk __user *compat_dqblk;
+	struct fs_quota_stat __user *fsqstat;
+	struct compat_fs_quota_stat __user *compat_fsqstat;
+	compat_uint_t data;
+	u16 xdata;
+	long ret;
+
+	cmds = cmd >> SUBCMDSHIFT;
+
+	switch (cmds) {
+	case Q_GETQUOTA:
+		dqblk = compat_alloc_user_space(sizeof(struct if_dqblk));
+		compat_dqblk = addr;
+		ret = sys_quotactl(cmd, special, id, dqblk);
+		if (ret)
+			break;
+		if (copy_in_user(compat_dqblk, dqblk, sizeof(*compat_dqblk)) ||
+			get_user(data, &dqblk->dqb_valid) ||
+			put_user(data, &compat_dqblk->dqb_valid))
+			ret = -EFAULT;
+		break;
+	case Q_SETQUOTA:
+		dqblk = compat_alloc_user_space(sizeof(struct if_dqblk));
+		compat_dqblk = addr;
+		ret = -EFAULT;
+		if (copy_in_user(dqblk, compat_dqblk, sizeof(*compat_dqblk)) ||
+			get_user(data, &compat_dqblk->dqb_valid) ||
+			put_user(data, &dqblk->dqb_valid))
+			break;
+		ret = sys_quotactl(cmd, special, id, dqblk);
+		break;
+	case Q_XGETQSTAT:
+		fsqstat = compat_alloc_user_space(sizeof(struct fs_quota_stat));
+		compat_fsqstat = addr;
+		ret = sys_quotactl(cmd, special, id, fsqstat);
+		if (ret)
+			break;
+		ret = -EFAULT;
+		/* Copying qs_version, qs_flags, qs_pad */
+		if (copy_in_user(compat_fsqstat, fsqstat,
+			offsetof(struct compat_fs_quota_stat, qs_uquota)))
+			break;
+		/* Copying qs_uquota */
+		if (copy_in_user(&compat_fsqstat->qs_uquota,
+			&fsqstat->qs_uquota,
+			sizeof(compat_fsqstat->qs_uquota)) ||
+			get_user(data, &fsqstat->qs_uquota.qfs_nextents) ||
+			put_user(data, &compat_fsqstat->qs_uquota.qfs_nextents))
+			break;
+		/* Copying qs_gquota */
+		if (copy_in_user(&compat_fsqstat->qs_gquota,
+			&fsqstat->qs_gquota,
+			sizeof(compat_fsqstat->qs_gquota)) ||
+			get_user(data, &fsqstat->qs_gquota.qfs_nextents) ||
+			put_user(data, &compat_fsqstat->qs_gquota.qfs_nextents))
+			break;
+		/* Copying the rest */
+		if (copy_in_user(&compat_fsqstat->qs_incoredqs,
+			&fsqstat->qs_incoredqs,
+			sizeof(struct compat_fs_quota_stat) -
+			offsetof(struct compat_fs_quota_stat, qs_incoredqs)) ||
+			get_user(xdata, &fsqstat->qs_iwarnlimit) ||
+			put_user(xdata, &compat_fsqstat->qs_iwarnlimit))
+			break;
+		ret = 0;
+		break;
+	default:
+		ret = sys_quotactl(cmd, special, id, addr);
+	}
+	return ret;
+}
+#endif
diff --git a/fs/ramfs/file-mmu.c b/fs/ramfs/file-mmu.c
index 2f14774..97bdc0b 100644
--- a/fs/ramfs/file-mmu.c
+++ b/fs/ramfs/file-mmu.c
@@ -41,7 +41,7 @@ const struct file_operations ramfs_file_operations = {
 	.aio_write	= generic_file_aio_write,
 	.mmap		= generic_file_mmap,
 	.fsync		= simple_sync_file,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 	.llseek		= generic_file_llseek,
 };
 
diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index 5d258c4..cad2b7a 100644
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -42,7 +42,7 @@ const struct file_operations ramfs_file_operations = {
 	.write			= do_sync_write,
 	.aio_write		= generic_file_aio_write,
 	.fsync			= simple_sync_file,
-	.sendfile		= generic_file_sendfile,
+	.splice_read		= generic_file_splice_read,
 	.llseek			= generic_file_llseek,
 };
 
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index d40d22b..ef2b46d 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -60,6 +60,7 @@ struct inode *ramfs_get_inode(struct super_block *sb, int mode, dev_t dev)
 		inode->i_blocks = 0;
 		inode->i_mapping->a_ops = &ramfs_aops;
 		inode->i_mapping->backing_dev_info = &ramfs_backing_dev_info;
+		mapping_set_gfp_mask(inode->i_mapping, GFP_HIGHUSER);
 		inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 		switch (mode & S_IFMT) {
 		default:
diff --git a/fs/read_write.c b/fs/read_write.c
index 4d03008..507ddff 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -15,6 +15,7 @@
 #include <linux/module.h>
 #include <linux/syscalls.h>
 #include <linux/pagemap.h>
+#include <linux/splice.h>
 #include "read_write.h"
 
 #include <asm/uaccess.h>
@@ -25,7 +26,7 @@ const struct file_operations generic_ro_fops = {
 	.read		= do_sync_read,
 	.aio_read	= generic_file_aio_read,
 	.mmap		= generic_file_readonly_mmap,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 };
 
 EXPORT_SYMBOL(generic_ro_fops);
@@ -708,7 +709,7 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
 	struct inode * in_inode, * out_inode;
 	loff_t pos;
 	ssize_t retval;
-	int fput_needed_in, fput_needed_out;
+	int fput_needed_in, fput_needed_out, fl;
 
 	/*
 	 * Get input file, and verify that it is ok..
@@ -723,7 +724,7 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
 	in_inode = in_file->f_path.dentry->d_inode;
 	if (!in_inode)
 		goto fput_in;
-	if (!in_file->f_op || !in_file->f_op->sendfile)
+	if (!in_file->f_op || !in_file->f_op->splice_read)
 		goto fput_in;
 	retval = -ESPIPE;
 	if (!ppos)
@@ -776,7 +777,18 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
 		count = max - pos;
 	}
 
-	retval = in_file->f_op->sendfile(in_file, ppos, count, file_send_actor, out_file);
+	fl = 0;
+#if 0
+	/*
+	 * We need to debate whether we can enable this or not. The
+	 * man page documents EAGAIN return for the output at least,
+	 * and the application is arguably buggy if it doesn't expect
+	 * EAGAIN on a non-blocking file descriptor.
+	 */
+	if (in_file->f_flags & O_NONBLOCK)
+		fl = SPLICE_F_NONBLOCK;
+#endif
+	retval = do_splice_direct(in_file, ppos, out_file, count, fl);
 
 	if (retval > 0) {
 		add_rchar(current, retval);
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index 9e451a6..2070aee 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -1305,7 +1305,6 @@ static ssize_t reiserfs_file_write(struct file *file,	/* the file we are going t
 	if (get_inode_item_key_version (inode) == KEY_FORMAT_3_5 &&
 	    *ppos + count > MAX_NON_LFS) {
 		if (*ppos >= MAX_NON_LFS) {
-			send_sig(SIGXFSZ, current, 0);
 			return -EFBIG;
 		}
 		if (count > MAX_NON_LFS - (unsigned long)*ppos)
@@ -1531,7 +1530,6 @@ const struct file_operations reiserfs_file_operations = {
 	.open = generic_file_open,
 	.release = reiserfs_file_release,
 	.fsync = reiserfs_sync_file,
-	.sendfile = generic_file_sendfile,
 	.aio_read = generic_file_aio_read,
 	.aio_write = generic_file_aio_write,
 	.splice_read = generic_file_splice_read,
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 1272d11..ddde489 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -7,6 +7,7 @@
 #include <linux/reiserfs_fs.h>
 #include <linux/reiserfs_acl.h>
 #include <linux/reiserfs_xattr.h>
+#include <linux/exportfs.h>
 #include <linux/smp_lock.h>
 #include <linux/pagemap.h>
 #include <linux/highmem.h>
diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c
index b484d29..11a0fcc 100644
--- a/fs/reiserfs/ioctl.c
+++ b/fs/reiserfs/ioctl.c
@@ -51,8 +51,7 @@ int reiserfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 			if (IS_RDONLY(inode))
 				return -EROFS;
 
-			if ((current->fsuid != inode->i_uid)
-			    && !capable(CAP_FOWNER))
+			if (!is_owner_or_cap(inode))
 				return -EPERM;
 
 			if (get_user(flags, (int __user *)arg))
@@ -81,7 +80,7 @@ int reiserfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 	case REISERFS_IOC_GETVERSION:
 		return put_user(inode->i_generation, (int __user *)arg);
 	case REISERFS_IOC_SETVERSION:
-		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+		if (!is_owner_or_cap(inode))
 			return -EPERM;
 		if (IS_RDONLY(inode))
 			return -EROFS;
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index b4ac911..5a93cfe 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -21,6 +21,7 @@
 #include <linux/init.h>
 #include <linux/blkdev.h>
 #include <linux/buffer_head.h>
+#include <linux/exportfs.h>
 #include <linux/vfs.h>
 #include <linux/mnt_namespace.h>
 #include <linux/mount.h>
diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c
index 5296a29..b7e4fa4 100644
--- a/fs/reiserfs/xattr_acl.c
+++ b/fs/reiserfs/xattr_acl.c
@@ -21,7 +21,7 @@ xattr_set_acl(struct inode *inode, int type, const void *value, size_t size)
 
 	if (!reiserfs_posixacl(inode->i_sb))
 		return -EOPNOTSUPP;
-	if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+	if (!is_owner_or_cap(inode))
 		return -EPERM;
 
 	if (value) {
diff --git a/fs/seq_file.c b/fs/seq_file.c
index 0ac22af..bbb19be 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -177,21 +177,23 @@ EXPORT_SYMBOL(seq_read);
 
 static int traverse(struct seq_file *m, loff_t offset)
 {
-	loff_t pos = 0;
+	loff_t pos = 0, index;
 	int error = 0;
 	void *p;
 
 	m->version = 0;
-	m->index = 0;
+	index = 0;
 	m->count = m->from = 0;
-	if (!offset)
+	if (!offset) {
+		m->index = index;
 		return 0;
+	}
 	if (!m->buf) {
 		m->buf = kmalloc(m->size = PAGE_SIZE, GFP_KERNEL);
 		if (!m->buf)
 			return -ENOMEM;
 	}
-	p = m->op->start(m, &m->index);
+	p = m->op->start(m, &index);
 	while (p) {
 		error = PTR_ERR(p);
 		if (IS_ERR(p))
@@ -204,15 +206,17 @@ static int traverse(struct seq_file *m, loff_t offset)
 		if (pos + m->count > offset) {
 			m->from = offset - pos;
 			m->count -= m->from;
+			m->index = index;
 			break;
 		}
 		pos += m->count;
 		m->count = 0;
 		if (pos == offset) {
-			m->index++;
+			index++;
+			m->index = index;
 			break;
 		}
-		p = m->op->next(m, p, &m->index);
+		p = m->op->next(m, p, &index);
 	}
 	m->op->stop(m, p);
 	return error;
@@ -260,8 +264,8 @@ loff_t seq_lseek(struct file *file, loff_t offset, int origin)
 				}
 			}
 	}
-	mutex_unlock(&m->lock);
 	file->f_version = m->version;
+	mutex_unlock(&m->lock);
 	return retval;
 }
 EXPORT_SYMBOL(seq_lseek);
@@ -447,3 +451,37 @@ int seq_puts(struct seq_file *m, const char *s)
 	return -1;
 }
 EXPORT_SYMBOL(seq_puts);
+
+struct list_head *seq_list_start(struct list_head *head, loff_t pos)
+{
+	struct list_head *lh;
+
+	list_for_each(lh, head)
+		if (pos-- == 0)
+			return lh;
+
+	return NULL;
+}
+
+EXPORT_SYMBOL(seq_list_start);
+
+struct list_head *seq_list_start_head(struct list_head *head, loff_t pos)
+{
+	if (!pos)
+		return head;
+
+	return seq_list_start(head, pos - 1);
+}
+
+EXPORT_SYMBOL(seq_list_start_head);
+
+struct list_head *seq_list_next(void *v, struct list_head *head, loff_t *ppos)
+{
+	struct list_head *lh;
+
+	lh = ((struct list_head *)v)->next;
+	++*ppos;
+	return lh == head ? NULL : lh;
+}
+
+EXPORT_SYMBOL(seq_list_next);
diff --git a/fs/signalfd.c b/fs/signalfd.c
index f1da892..3b07f26 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -133,7 +133,8 @@ static unsigned int signalfd_poll(struct file *file, poll_table *wait)
 	 * the peer disconnects.
 	 */
 	if (signalfd_lock(ctx, &lk)) {
-		if (next_signal(&lk.tsk->pending, &ctx->sigmask) > 0 ||
+		if ((lk.tsk == current &&
+		     next_signal(&lk.tsk->pending, &ctx->sigmask) > 0) ||
 		    next_signal(&lk.tsk->signal->shared_pending,
 				&ctx->sigmask) > 0)
 			events |= POLLIN;
diff --git a/fs/smbfs/file.c b/fs/smbfs/file.c
index aea3f8a..c5d78a7 100644
--- a/fs/smbfs/file.c
+++ b/fs/smbfs/file.c
@@ -262,8 +262,9 @@ out:
 }
 
 static ssize_t
-smb_file_sendfile(struct file *file, loff_t *ppos,
-		  size_t count, read_actor_t actor, void *target)
+smb_file_splice_read(struct file *file, loff_t *ppos,
+		     struct pipe_inode_info *pipe, size_t count,
+		     unsigned int flags)
 {
 	struct dentry *dentry = file->f_path.dentry;
 	ssize_t status;
@@ -277,7 +278,7 @@ smb_file_sendfile(struct file *file, loff_t *ppos,
 			 DENTRY_PATH(dentry), status);
 		goto out;
 	}
-	status = generic_file_sendfile(file, ppos, count, actor, target);
+	status = generic_file_splice_read(file, ppos, pipe, count, flags);
 out:
 	return status;
 }
@@ -416,7 +417,7 @@ const struct file_operations smb_file_operations =
 	.open		= smb_file_open,
 	.release	= smb_file_release,
 	.fsync		= smb_fsync,
-	.sendfile	= smb_file_sendfile,
+	.splice_read	= smb_file_splice_read,
 };
 
 const struct inode_operations smb_file_inode_operations =
diff --git a/fs/splice.c b/fs/splice.c
index e7d7080..53fc208 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -20,7 +20,7 @@
 #include <linux/fs.h>
 #include <linux/file.h>
 #include <linux/pagemap.h>
-#include <linux/pipe_fs_i.h>
+#include <linux/splice.h>
 #include <linux/mm_inline.h>
 #include <linux/swap.h>
 #include <linux/writeback.h>
@@ -28,22 +28,7 @@
 #include <linux/module.h>
 #include <linux/syscalls.h>
 #include <linux/uio.h>
-
-struct partial_page {
-	unsigned int offset;
-	unsigned int len;
-};
-
-/*
- * Passed to splice_to_pipe
- */
-struct splice_pipe_desc {
-	struct page **pages;		/* page map */
-	struct partial_page *partial;	/* pages[] may not be contig */
-	int nr_pages;			/* number of pages in map */
-	unsigned int flags;		/* splice flags */
-	const struct pipe_buf_operations *ops;/* ops associated with output pipe */
-};
+#include <linux/security.h>
 
 /*
  * Attempt to steal a page from a pipe buffer. This should perhaps go into
@@ -101,8 +86,12 @@ static void page_cache_pipe_buf_release(struct pipe_inode_info *pipe,
 	buf->flags &= ~PIPE_BUF_FLAG_LRU;
 }
 
-static int page_cache_pipe_buf_pin(struct pipe_inode_info *pipe,
-				   struct pipe_buffer *buf)
+/*
+ * Check whether the contents of buf is OK to access. Since the content
+ * is a page cache page, IO may be in flight.
+ */
+static int page_cache_pipe_buf_confirm(struct pipe_inode_info *pipe,
+				       struct pipe_buffer *buf)
 {
 	struct page *page = buf->page;
 	int err;
@@ -143,7 +132,7 @@ static const struct pipe_buf_operations page_cache_pipe_buf_ops = {
 	.can_merge = 0,
 	.map = generic_pipe_buf_map,
 	.unmap = generic_pipe_buf_unmap,
-	.pin = page_cache_pipe_buf_pin,
+	.confirm = page_cache_pipe_buf_confirm,
 	.release = page_cache_pipe_buf_release,
 	.steal = page_cache_pipe_buf_steal,
 	.get = generic_pipe_buf_get,
@@ -163,18 +152,25 @@ static const struct pipe_buf_operations user_page_pipe_buf_ops = {
 	.can_merge = 0,
 	.map = generic_pipe_buf_map,
 	.unmap = generic_pipe_buf_unmap,
-	.pin = generic_pipe_buf_pin,
+	.confirm = generic_pipe_buf_confirm,
 	.release = page_cache_pipe_buf_release,
 	.steal = user_page_pipe_buf_steal,
 	.get = generic_pipe_buf_get,
 };
 
-/*
- * Pipe output worker. This sets up our pipe format with the page cache
- * pipe buffer operations. Otherwise very similar to the regular pipe_writev().
+/**
+ * splice_to_pipe - fill passed data into a pipe
+ * @pipe:	pipe to fill
+ * @spd:	data to fill
+ *
+ * Description:
+ *    @spd contains a map of pages and len/offset tupples, a long with
+ *    the struct pipe_buf_operations associated with these pages. This
+ *    function will link that data to the pipe.
+ *
  */
-static ssize_t splice_to_pipe(struct pipe_inode_info *pipe,
-			      struct splice_pipe_desc *spd)
+ssize_t splice_to_pipe(struct pipe_inode_info *pipe,
+		       struct splice_pipe_desc *spd)
 {
 	unsigned int spd_pages = spd->nr_pages;
 	int ret, do_wakeup, page_nr;
@@ -201,6 +197,7 @@ static ssize_t splice_to_pipe(struct pipe_inode_info *pipe,
 			buf->page = spd->pages[page_nr];
 			buf->offset = spd->partial[page_nr].offset;
 			buf->len = spd->partial[page_nr].len;
+			buf->private = spd->partial[page_nr].private;
 			buf->ops = spd->ops;
 			if (spd->flags & SPLICE_F_GIFT)
 				buf->flags |= PIPE_BUF_FLAG_GIFT;
@@ -296,19 +293,15 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
 	page_cache_readahead(mapping, &in->f_ra, in, index, nr_pages);
 
 	/*
-	 * Now fill in the holes:
-	 */
-	error = 0;
-
-	/*
 	 * Lookup the (hopefully) full range of pages we need.
 	 */
 	spd.nr_pages = find_get_pages_contig(mapping, index, nr_pages, pages);
 
 	/*
 	 * If find_get_pages_contig() returned fewer pages than we needed,
-	 * allocate the rest.
+	 * allocate the rest and fill in the holes.
 	 */
+	error = 0;
 	index += spd.nr_pages;
 	while (spd.nr_pages < nr_pages) {
 		/*
@@ -470,11 +463,16 @@ fill_it:
 /**
  * generic_file_splice_read - splice data from file to a pipe
  * @in:		file to splice from
+ * @ppos:	position in @in
  * @pipe:	pipe to splice to
  * @len:	number of bytes to splice
  * @flags:	splice modifier flags
  *
- * Will read pages from given file and fill them into a pipe.
+ * Description:
+ *    Will read pages from given file and fill them into a pipe. Can be
+ *    used as long as the address_space operations for the source implements
+ *    a readpage() hook.
+ *
  */
 ssize_t generic_file_splice_read(struct file *in, loff_t *ppos,
 				 struct pipe_inode_info *pipe, size_t len,
@@ -494,7 +492,7 @@ ssize_t generic_file_splice_read(struct file *in, loff_t *ppos,
 
 	ret = 0;
 	spliced = 0;
-	while (len) {
+	while (len && !spliced) {
 		ret = __generic_file_splice_read(in, ppos, pipe, len, flags);
 
 		if (ret < 0)
@@ -528,11 +526,11 @@ EXPORT_SYMBOL(generic_file_splice_read);
 static int pipe_to_sendpage(struct pipe_inode_info *pipe,
 			    struct pipe_buffer *buf, struct splice_desc *sd)
 {
-	struct file *file = sd->file;
+	struct file *file = sd->u.file;
 	loff_t pos = sd->pos;
 	int ret, more;
 
-	ret = buf->ops->pin(pipe, buf);
+	ret = buf->ops->confirm(pipe, buf);
 	if (!ret) {
 		more = (sd->flags & SPLICE_F_MORE) || sd->len < sd->total_len;
 
@@ -566,7 +564,7 @@ static int pipe_to_sendpage(struct pipe_inode_info *pipe,
 static int pipe_to_file(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
 			struct splice_desc *sd)
 {
-	struct file *file = sd->file;
+	struct file *file = sd->u.file;
 	struct address_space *mapping = file->f_mapping;
 	unsigned int offset, this_len;
 	struct page *page;
@@ -576,7 +574,7 @@ static int pipe_to_file(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
 	/*
 	 * make sure the data in this buffer is uptodate
 	 */
-	ret = buf->ops->pin(pipe, buf);
+	ret = buf->ops->confirm(pipe, buf);
 	if (unlikely(ret))
 		return ret;
 
@@ -663,36 +661,37 @@ out_ret:
 	return ret;
 }
 
-/*
- * Pipe input worker. Most of this logic works like a regular pipe, the
- * key here is the 'actor' worker passed in that actually moves the data
- * to the wanted destination. See pipe_to_file/pipe_to_sendpage above.
+/**
+ * __splice_from_pipe - splice data from a pipe to given actor
+ * @pipe:	pipe to splice from
+ * @sd:		information to @actor
+ * @actor:	handler that splices the data
+ *
+ * Description:
+ *    This function does little more than loop over the pipe and call
+ *    @actor to do the actual moving of a single struct pipe_buffer to
+ *    the desired destination. See pipe_to_file, pipe_to_sendpage, or
+ *    pipe_to_user.
+ *
  */
-ssize_t __splice_from_pipe(struct pipe_inode_info *pipe,
-			   struct file *out, loff_t *ppos, size_t len,
-			   unsigned int flags, splice_actor *actor)
+ssize_t __splice_from_pipe(struct pipe_inode_info *pipe, struct splice_desc *sd,
+			   splice_actor *actor)
 {
 	int ret, do_wakeup, err;
-	struct splice_desc sd;
 
 	ret = 0;
 	do_wakeup = 0;
 
-	sd.total_len = len;
-	sd.flags = flags;
-	sd.file = out;
-	sd.pos = *ppos;
-
 	for (;;) {
 		if (pipe->nrbufs) {
 			struct pipe_buffer *buf = pipe->bufs + pipe->curbuf;
 			const struct pipe_buf_operations *ops = buf->ops;
 
-			sd.len = buf->len;
-			if (sd.len > sd.total_len)
-				sd.len = sd.total_len;
+			sd->len = buf->len;
+			if (sd->len > sd->total_len)
+				sd->len = sd->total_len;
 
-			err = actor(pipe, buf, &sd);
+			err = actor(pipe, buf, sd);
 			if (err <= 0) {
 				if (!ret && err != -ENODATA)
 					ret = err;
@@ -704,10 +703,10 @@ ssize_t __splice_from_pipe(struct pipe_inode_info *pipe,
 			buf->offset += err;
 			buf->len -= err;
 
-			sd.len -= err;
-			sd.pos += err;
-			sd.total_len -= err;
-			if (sd.len)
+			sd->len -= err;
+			sd->pos += err;
+			sd->total_len -= err;
+			if (sd->len)
 				continue;
 
 			if (!buf->len) {
@@ -719,7 +718,7 @@ ssize_t __splice_from_pipe(struct pipe_inode_info *pipe,
 					do_wakeup = 1;
 			}
 
-			if (!sd.total_len)
+			if (!sd->total_len)
 				break;
 		}
 
@@ -732,7 +731,7 @@ ssize_t __splice_from_pipe(struct pipe_inode_info *pipe,
 				break;
 		}
 
-		if (flags & SPLICE_F_NONBLOCK) {
+		if (sd->flags & SPLICE_F_NONBLOCK) {
 			if (!ret)
 				ret = -EAGAIN;
 			break;
@@ -766,12 +765,32 @@ ssize_t __splice_from_pipe(struct pipe_inode_info *pipe,
 }
 EXPORT_SYMBOL(__splice_from_pipe);
 
+/**
+ * splice_from_pipe - splice data from a pipe to a file
+ * @pipe:	pipe to splice from
+ * @out:	file to splice to
+ * @ppos:	position in @out
+ * @len:	how many bytes to splice
+ * @flags:	splice modifier flags
+ * @actor:	handler that splices the data
+ *
+ * Description:
+ *    See __splice_from_pipe. This function locks the input and output inodes,
+ *    otherwise it's identical to __splice_from_pipe().
+ *
+ */
 ssize_t splice_from_pipe(struct pipe_inode_info *pipe, struct file *out,
 			 loff_t *ppos, size_t len, unsigned int flags,
 			 splice_actor *actor)
 {
 	ssize_t ret;
 	struct inode *inode = out->f_mapping->host;
+	struct splice_desc sd = {
+		.total_len = len,
+		.flags = flags,
+		.pos = *ppos,
+		.u.file = out,
+	};
 
 	/*
 	 * The actor worker might be calling ->prepare_write and
@@ -780,7 +799,7 @@ ssize_t splice_from_pipe(struct pipe_inode_info *pipe, struct file *out,
 	 * pipe->inode, we have to order lock acquiry here.
 	 */
 	inode_double_lock(inode, pipe->inode);
-	ret = __splice_from_pipe(pipe, out, ppos, len, flags, actor);
+	ret = __splice_from_pipe(pipe, &sd, actor);
 	inode_double_unlock(inode, pipe->inode);
 
 	return ret;
@@ -790,12 +809,14 @@ ssize_t splice_from_pipe(struct pipe_inode_info *pipe, struct file *out,
  * generic_file_splice_write_nolock - generic_file_splice_write without mutexes
  * @pipe:	pipe info
  * @out:	file to write to
+ * @ppos:	position in @out
  * @len:	number of bytes to splice
  * @flags:	splice modifier flags
  *
- * Will either move or copy pages (determined by @flags options) from
- * the given pipe inode to the given file. The caller is responsible
- * for acquiring i_mutex on both inodes.
+ * Description:
+ *    Will either move or copy pages (determined by @flags options) from
+ *    the given pipe inode to the given file. The caller is responsible
+ *    for acquiring i_mutex on both inodes.
  *
  */
 ssize_t
@@ -804,6 +825,12 @@ generic_file_splice_write_nolock(struct pipe_inode_info *pipe, struct file *out,
 {
 	struct address_space *mapping = out->f_mapping;
 	struct inode *inode = mapping->host;
+	struct splice_desc sd = {
+		.total_len = len,
+		.flags = flags,
+		.pos = *ppos,
+		.u.file = out,
+	};
 	ssize_t ret;
 	int err;
 
@@ -811,7 +838,7 @@ generic_file_splice_write_nolock(struct pipe_inode_info *pipe, struct file *out,
 	if (unlikely(err))
 		return err;
 
-	ret = __splice_from_pipe(pipe, out, ppos, len, flags, pipe_to_file);
+	ret = __splice_from_pipe(pipe, &sd, pipe_to_file);
 	if (ret > 0) {
 		unsigned long nr_pages;
 
@@ -841,11 +868,13 @@ EXPORT_SYMBOL(generic_file_splice_write_nolock);
  * generic_file_splice_write - splice data from a pipe to a file
  * @pipe:	pipe info
  * @out:	file to write to
+ * @ppos:	position in @out
  * @len:	number of bytes to splice
  * @flags:	splice modifier flags
  *
- * Will either move or copy pages (determined by @flags options) from
- * the given pipe inode to the given file.
+ * Description:
+ *    Will either move or copy pages (determined by @flags options) from
+ *    the given pipe inode to the given file.
  *
  */
 ssize_t
@@ -896,13 +925,15 @@ EXPORT_SYMBOL(generic_file_splice_write);
 
 /**
  * generic_splice_sendpage - splice data from a pipe to a socket
- * @inode:	pipe inode
+ * @pipe:	pipe to splice from
  * @out:	socket to write to
+ * @ppos:	position in @out
  * @len:	number of bytes to splice
  * @flags:	splice modifier flags
  *
- * Will send @len bytes from the pipe to a network socket. No data copying
- * is involved.
+ * Description:
+ *    Will send @len bytes from the pipe to a network socket. No data copying
+ *    is involved.
  *
  */
 ssize_t generic_splice_sendpage(struct pipe_inode_info *pipe, struct file *out,
@@ -931,6 +962,10 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
 	if (unlikely(ret < 0))
 		return ret;
 
+	ret = security_file_permission(out, MAY_WRITE);
+	if (unlikely(ret < 0))
+		return ret;
+
 	return out->f_op->splice_write(pipe, out, ppos, len, flags);
 }
 
@@ -953,17 +988,34 @@ static long do_splice_to(struct file *in, loff_t *ppos,
 	if (unlikely(ret < 0))
 		return ret;
 
+	ret = security_file_permission(in, MAY_READ);
+	if (unlikely(ret < 0))
+		return ret;
+
 	return in->f_op->splice_read(in, ppos, pipe, len, flags);
 }
 
-long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
-		      size_t len, unsigned int flags)
+/**
+ * splice_direct_to_actor - splices data directly between two non-pipes
+ * @in:		file to splice from
+ * @sd:		actor information on where to splice to
+ * @actor:	handles the data splicing
+ *
+ * Description:
+ *    This is a special case helper to splice directly between two
+ *    points, without requiring an explicit pipe. Internally an allocated
+ *    pipe is cached in the process, and reused during the life time of
+ *    that process.
+ *
+ */
+ssize_t splice_direct_to_actor(struct file *in, struct splice_desc *sd,
+			       splice_direct_actor *actor)
 {
 	struct pipe_inode_info *pipe;
 	long ret, bytes;
-	loff_t out_off;
 	umode_t i_mode;
-	int i;
+	size_t len;
+	int i, flags;
 
 	/*
 	 * We require the input being a regular file, as we don't want to
@@ -999,49 +1051,43 @@ long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
 	 */
 	ret = 0;
 	bytes = 0;
-	out_off = 0;
+	len = sd->total_len;
+	flags = sd->flags;
 
-	while (len) {
-		size_t read_len, max_read_len;
+	/*
+	 * Don't block on output, we have to drain the direct pipe.
+	 */
+	sd->flags &= ~SPLICE_F_NONBLOCK;
 
-		/*
-		 * Do at most PIPE_BUFFERS pages worth of transfer:
-		 */
-		max_read_len = min(len, (size_t)(PIPE_BUFFERS*PAGE_SIZE));
+	while (len) {
+		size_t read_len;
+		loff_t pos = sd->pos;
 
-		ret = do_splice_to(in, ppos, pipe, max_read_len, flags);
-		if (unlikely(ret < 0))
+		ret = do_splice_to(in, &pos, pipe, len, flags);
+		if (unlikely(ret <= 0))
 			goto out_release;
 
 		read_len = ret;
+		sd->total_len = read_len;
 
 		/*
 		 * NOTE: nonblocking mode only applies to the input. We
 		 * must not do the output in nonblocking mode as then we
 		 * could get stuck data in the internal pipe:
 		 */
-		ret = do_splice_from(pipe, out, &out_off, read_len,
-				     flags & ~SPLICE_F_NONBLOCK);
-		if (unlikely(ret < 0))
+		ret = actor(pipe, sd);
+		if (unlikely(ret <= 0))
 			goto out_release;
 
 		bytes += ret;
 		len -= ret;
+		sd->pos = pos;
 
-		/*
-		 * In nonblocking mode, if we got back a short read then
-		 * that was due to either an IO error or due to the
-		 * pagecache entry not being there. In the IO error case
-		 * the _next_ splice attempt will produce a clean IO error
-		 * return value (not a short read), so in both cases it's
-		 * correct to break out of the loop here:
-		 */
-		if ((flags & SPLICE_F_NONBLOCK) && (read_len < max_read_len))
-			break;
+		if (ret < read_len)
+			goto out_release;
 	}
 
 	pipe->nrbufs = pipe->curbuf = 0;
-
 	return bytes;
 
 out_release:
@@ -1066,6 +1112,50 @@ out_release:
 		return bytes;
 
 	return ret;
+
+}
+EXPORT_SYMBOL(splice_direct_to_actor);
+
+static int direct_splice_actor(struct pipe_inode_info *pipe,
+			       struct splice_desc *sd)
+{
+	struct file *file = sd->u.file;
+
+	return do_splice_from(pipe, file, &sd->pos, sd->total_len, sd->flags);
+}
+
+/**
+ * do_splice_direct - splices data directly between two files
+ * @in:		file to splice from
+ * @ppos:	input file offset
+ * @out:	file to splice to
+ * @len:	number of bytes to splice
+ * @flags:	splice modifier flags
+ *
+ * Description:
+ *    For use by do_sendfile(). splice can easily emulate sendfile, but
+ *    doing it in the application would incur an extra system call
+ *    (splice in + splice out, as compared to just sendfile()). So this helper
+ *    can splice directly through a process-private pipe.
+ *
+ */
+long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
+		      size_t len, unsigned int flags)
+{
+	struct splice_desc sd = {
+		.len		= len,
+		.total_len	= len,
+		.flags		= flags,
+		.pos		= *ppos,
+		.u.file		= out,
+	};
+	long ret;
+
+	ret = splice_direct_to_actor(in, &sd, direct_splice_actor);
+	if (ret > 0)
+		*ppos += ret;
+
+	return ret;
 }
 
 /*
@@ -1248,28 +1338,131 @@ static int get_iovec_page_array(const struct iovec __user *iov,
 	return error;
 }
 
+static int pipe_to_user(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
+			struct splice_desc *sd)
+{
+	char *src;
+	int ret;
+
+	ret = buf->ops->confirm(pipe, buf);
+	if (unlikely(ret))
+		return ret;
+
+	/*
+	 * See if we can use the atomic maps, by prefaulting in the
+	 * pages and doing an atomic copy
+	 */
+	if (!fault_in_pages_writeable(sd->u.userptr, sd->len)) {
+		src = buf->ops->map(pipe, buf, 1);
+		ret = __copy_to_user_inatomic(sd->u.userptr, src + buf->offset,
+							sd->len);
+		buf->ops->unmap(pipe, buf, src);
+		if (!ret) {
+			ret = sd->len;
+			goto out;
+		}
+	}
+
+	/*
+	 * No dice, use slow non-atomic map and copy
+ 	 */
+	src = buf->ops->map(pipe, buf, 0);
+
+	ret = sd->len;
+	if (copy_to_user(sd->u.userptr, src + buf->offset, sd->len))
+		ret = -EFAULT;
+
+out:
+	if (ret > 0)
+		sd->u.userptr += ret;
+	buf->ops->unmap(pipe, buf, src);
+	return ret;
+}
+
+/*
+ * For lack of a better implementation, implement vmsplice() to userspace
+ * as a simple copy of the pipes pages to the user iov.
+ */
+static long vmsplice_to_user(struct file *file, const struct iovec __user *iov,
+			     unsigned long nr_segs, unsigned int flags)
+{
+	struct pipe_inode_info *pipe;
+	struct splice_desc sd;
+	ssize_t size;
+	int error;
+	long ret;
+
+	pipe = pipe_info(file->f_path.dentry->d_inode);
+	if (!pipe)
+		return -EBADF;
+
+	if (pipe->inode)
+		mutex_lock(&pipe->inode->i_mutex);
+
+	error = ret = 0;
+	while (nr_segs) {
+		void __user *base;
+		size_t len;
+
+		/*
+		 * Get user address base and length for this iovec.
+		 */
+		error = get_user(base, &iov->iov_base);
+		if (unlikely(error))
+			break;
+		error = get_user(len, &iov->iov_len);
+		if (unlikely(error))
+			break;
+
+		/*
+		 * Sanity check this iovec. 0 read succeeds.
+		 */
+		if (unlikely(!len))
+			break;
+		if (unlikely(!base)) {
+			error = -EFAULT;
+			break;
+		}
+
+		sd.len = 0;
+		sd.total_len = len;
+		sd.flags = flags;
+		sd.u.userptr = base;
+		sd.pos = 0;
+
+		size = __splice_from_pipe(pipe, &sd, pipe_to_user);
+		if (size < 0) {
+			if (!ret)
+				ret = size;
+
+			break;
+		}
+
+		ret += size;
+
+		if (size < len)
+			break;
+
+		nr_segs--;
+		iov++;
+	}
+
+	if (pipe->inode)
+		mutex_unlock(&pipe->inode->i_mutex);
+
+	if (!ret)
+		ret = error;
+
+	return ret;
+}
+
 /*
  * vmsplice splices a user address range into a pipe. It can be thought of
  * as splice-from-memory, where the regular splice is splice-from-file (or
  * to file). In both cases the output is a pipe, naturally.
- *
- * Note that vmsplice only supports splicing _from_ user memory to a pipe,
- * not the other way around. Splicing from user memory is a simple operation
- * that can be supported without any funky alignment restrictions or nasty
- * vm tricks. We simply map in the user memory and fill them into a pipe.
- * The reverse isn't quite as easy, though. There are two possible solutions
- * for that:
- *
- *	- memcpy() the data internally, at which point we might as well just
- *	  do a regular read() on the buffer anyway.
- *	- Lots of nasty vm tricks, that are neither fast nor flexible (it
- *	  has restriction limitations on both ends of the pipe).
- *
- * Alas, it isn't here.
- *
  */
-static long do_vmsplice(struct file *file, const struct iovec __user *iov,
-			unsigned long nr_segs, unsigned int flags)
+static long vmsplice_to_pipe(struct file *file, const struct iovec __user *iov,
+			     unsigned long nr_segs, unsigned int flags)
 {
 	struct pipe_inode_info *pipe;
 	struct page *pages[PIPE_BUFFERS];
@@ -1284,10 +1477,6 @@ static long do_vmsplice(struct file *file, const struct iovec __user *iov,
 	pipe = pipe_info(file->f_path.dentry->d_inode);
 	if (!pipe)
 		return -EBADF;
-	if (unlikely(nr_segs > UIO_MAXIOV))
-		return -EINVAL;
-	else if (unlikely(!nr_segs))
-		return 0;
 
 	spd.nr_pages = get_iovec_page_array(iov, nr_segs, pages, partial,
 					    flags & SPLICE_F_GIFT);
@@ -1297,6 +1486,22 @@ static long do_vmsplice(struct file *file, const struct iovec __user *iov,
 	return splice_to_pipe(pipe, &spd);
 }
 
+/*
+ * Note that vmsplice only really supports true splicing _from_ user memory
+ * to a pipe, not the other way around. Splicing from user memory is a simple
+ * operation that can be supported without any funky alignment restrictions
+ * or nasty vm tricks. We simply map in the user memory and fill them into
+ * a pipe. The reverse isn't quite as easy, though. There are two possible
+ * solutions for that:
+ *
+ *	- memcpy() the data internally, at which point we might as well just
+ *	  do a regular read() on the buffer anyway.
+ *	- Lots of nasty vm tricks, that are neither fast nor flexible (it
+ *	  has restriction limitations on both ends of the pipe).
+ *
+ * Currently we punt and implement it as a normal copy, see pipe_to_user().
+ *
+ */
 asmlinkage long sys_vmsplice(int fd, const struct iovec __user *iov,
 			     unsigned long nr_segs, unsigned int flags)
 {
@@ -1304,11 +1509,18 @@ asmlinkage long sys_vmsplice(int fd, const struct iovec __user *iov,
 	long error;
 	int fput;
 
+	if (unlikely(nr_segs > UIO_MAXIOV))
+		return -EINVAL;
+	else if (unlikely(!nr_segs))
+		return 0;
+
 	error = -EBADF;
 	file = fget_light(fd, &fput);
 	if (file) {
 		if (file->f_mode & FMODE_WRITE)
-			error = do_vmsplice(file, iov, nr_segs, flags);
+			error = vmsplice_to_pipe(file, iov, nr_segs, flags);
+		else if (file->f_mode & FMODE_READ)
+			error = vmsplice_to_user(file, iov, nr_segs, flags);
 
 		fput_light(file, fput);
 	}
diff --git a/fs/super.c b/fs/super.c
index 5260d62..fc8ebed 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -884,6 +884,7 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void
 	error = type->get_sb(type, flags, name, data, mnt);
 	if (error < 0)
 		goto out_free_secdata;
+	BUG_ON(!mnt->mnt_sb);
 
  	error = security_sb_kern_mount(mnt->mnt_sb, secdata);
  	if (error)
diff --git a/fs/sync.c b/fs/sync.c
index 2f97576..7cd005ea 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -236,6 +236,14 @@ out:
 	return ret;
 }
 
+/* It would be nice if people remember that not all the world's an i386
+   when they introduce new system calls */
+asmlinkage long sys_sync_file_range2(int fd, unsigned int flags,
+				     loff_t offset, loff_t nbytes)
+{
+	return sys_sync_file_range(fd, offset, nbytes, flags);
+}
+
 /*
  * `endbyte' is inclusive
  */
diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c
index d3b9f5f..135353f 100644
--- a/fs/sysfs/bin.c
+++ b/fs/sysfs/bin.c
@@ -20,29 +20,41 @@
 
 #include "sysfs.h"
 
+struct bin_buffer {
+	struct mutex	mutex;
+	void		*buffer;
+	int		mmapped;
+};
+
 static int
 fill_read(struct dentry *dentry, char *buffer, loff_t off, size_t count)
 {
-	struct bin_attribute * attr = to_bin_attr(dentry);
-	struct kobject * kobj = to_kobj(dentry->d_parent);
+	struct sysfs_dirent *attr_sd = dentry->d_fsdata;
+	struct bin_attribute *attr = attr_sd->s_elem.bin_attr.bin_attr;
+	struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
+	int rc;
+
+	/* need attr_sd for attr, its parent for kobj */
+	if (!sysfs_get_active_two(attr_sd))
+		return -ENODEV;
 
-	if (!attr->read)
-		return -EIO;
+	rc = -EIO;
+	if (attr->read)
+		rc = attr->read(kobj, attr, buffer, off, count);
 
-	return attr->read(kobj, buffer, off, count);
+	sysfs_put_active_two(attr_sd);
+
+	return rc;
 }
 
 static ssize_t
-read(struct file * file, char __user * userbuf, size_t count, loff_t * off)
+read(struct file *file, char __user *userbuf, size_t bytes, loff_t *off)
 {
-	char *buffer = file->private_data;
+	struct bin_buffer *bb = file->private_data;
 	struct dentry *dentry = file->f_path.dentry;
 	int size = dentry->d_inode->i_size;
 	loff_t offs = *off;
-	int ret;
-
-	if (count > PAGE_SIZE)
-		count = PAGE_SIZE;
+	int count = min_t(size_t, bytes, PAGE_SIZE);
 
 	if (size) {
 		if (offs > size)
@@ -51,43 +63,56 @@ read(struct file * file, char __user * userbuf, size_t count, loff_t * off)
 			count = size - offs;
 	}
 
-	ret = fill_read(dentry, buffer, offs, count);
-	if (ret < 0) 
-		return ret;
-	count = ret;
+	mutex_lock(&bb->mutex);
+
+	count = fill_read(dentry, bb->buffer, offs, count);
+	if (count < 0)
+		goto out_unlock;
 
-	if (copy_to_user(userbuf, buffer, count))
-		return -EFAULT;
+	if (copy_to_user(userbuf, bb->buffer, count)) {
+		count = -EFAULT;
+		goto out_unlock;
+	}
 
-	pr_debug("offs = %lld, *off = %lld, count = %zd\n", offs, *off, count);
+	pr_debug("offs = %lld, *off = %lld, count = %d\n", offs, *off, count);
 
 	*off = offs + count;
 
+ out_unlock:
+	mutex_unlock(&bb->mutex);
 	return count;
 }
 
 static int
 flush_write(struct dentry *dentry, char *buffer, loff_t offset, size_t count)
 {
-	struct bin_attribute *attr = to_bin_attr(dentry);
-	struct kobject *kobj = to_kobj(dentry->d_parent);
+	struct sysfs_dirent *attr_sd = dentry->d_fsdata;
+	struct bin_attribute *attr = attr_sd->s_elem.bin_attr.bin_attr;
+	struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
+	int rc;
+
+	/* need attr_sd for attr, its parent for kobj */
+	if (!sysfs_get_active_two(attr_sd))
+		return -ENODEV;
+
+	rc = -EIO;
+	if (attr->write)
+		rc = attr->write(kobj, attr, buffer, offset, count);
 
-	if (!attr->write)
-		return -EIO;
+	sysfs_put_active_two(attr_sd);
 
-	return attr->write(kobj, buffer, offset, count);
+	return rc;
 }
 
-static ssize_t write(struct file * file, const char __user * userbuf,
-		     size_t count, loff_t * off)
+static ssize_t write(struct file *file, const char __user *userbuf,
+		     size_t bytes, loff_t *off)
 {
-	char *buffer = file->private_data;
+	struct bin_buffer *bb = file->private_data;
 	struct dentry *dentry = file->f_path.dentry;
 	int size = dentry->d_inode->i_size;
 	loff_t offs = *off;
+	int count = min_t(size_t, bytes, PAGE_SIZE);
 
-	if (count > PAGE_SIZE)
-		count = PAGE_SIZE;
 	if (size) {
 		if (offs > size)
 			return 0;
@@ -95,72 +120,100 @@ static ssize_t write(struct file * file, const char __user * userbuf,
 			count = size - offs;
 	}
 
-	if (copy_from_user(buffer, userbuf, count))
-		return -EFAULT;
+	mutex_lock(&bb->mutex);
 
-	count = flush_write(dentry, buffer, offs, count);
+	if (copy_from_user(bb->buffer, userbuf, count)) {
+		count = -EFAULT;
+		goto out_unlock;
+	}
+
+	count = flush_write(dentry, bb->buffer, offs, count);
 	if (count > 0)
 		*off = offs + count;
+
+ out_unlock:
+	mutex_unlock(&bb->mutex);
 	return count;
 }
 
 static int mmap(struct file *file, struct vm_area_struct *vma)
 {
-	struct dentry *dentry = file->f_path.dentry;
-	struct bin_attribute *attr = to_bin_attr(dentry);
-	struct kobject *kobj = to_kobj(dentry->d_parent);
+	struct bin_buffer *bb = file->private_data;
+	struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
+	struct bin_attribute *attr = attr_sd->s_elem.bin_attr.bin_attr;
+	struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
+	int rc;
+
+	mutex_lock(&bb->mutex);
+
+	/* need attr_sd for attr, its parent for kobj */
+	if (!sysfs_get_active_two(attr_sd))
+		return -ENODEV;
 
-	if (!attr->mmap)
-		return -EINVAL;
+	rc = -EINVAL;
+	if (attr->mmap)
+		rc = attr->mmap(kobj, attr, vma);
 
-	return attr->mmap(kobj, attr, vma);
+	if (rc == 0 && !bb->mmapped)
+		bb->mmapped = 1;
+	else
+		sysfs_put_active_two(attr_sd);
+
+	mutex_unlock(&bb->mutex);
+
+	return rc;
 }
 
 static int open(struct inode * inode, struct file * file)
 {
-	struct kobject *kobj = sysfs_get_kobject(file->f_path.dentry->d_parent);
-	struct bin_attribute * attr = to_bin_attr(file->f_path.dentry);
-	int error = -EINVAL;
-
-	if (!kobj || !attr)
-		goto Done;
+	struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
+	struct bin_attribute *attr = attr_sd->s_elem.bin_attr.bin_attr;
+	struct bin_buffer *bb = NULL;
+	int error;
 
-	/* Grab the module reference for this attribute if we have one */
-	error = -ENODEV;
-	if (!try_module_get(attr->attr.owner)) 
-		goto Done;
+	/* need attr_sd for attr */
+	if (!sysfs_get_active(attr_sd))
+		return -ENODEV;
 
 	error = -EACCES;
 	if ((file->f_mode & FMODE_WRITE) && !(attr->write || attr->mmap))
-		goto Error;
+		goto err_out;
 	if ((file->f_mode & FMODE_READ) && !(attr->read || attr->mmap))
-		goto Error;
+		goto err_out;
 
 	error = -ENOMEM;
-	file->private_data = kmalloc(PAGE_SIZE, GFP_KERNEL);
-	if (!file->private_data)
-		goto Error;
-
-	error = 0;
-    goto Done;
-
- Error:
-	module_put(attr->attr.owner);
- Done:
-	if (error)
-		kobject_put(kobj);
+	bb = kzalloc(sizeof(*bb), GFP_KERNEL);
+	if (!bb)
+		goto err_out;
+
+	bb->buffer = kmalloc(PAGE_SIZE, GFP_KERNEL);
+	if (!bb->buffer)
+		goto err_out;
+
+	mutex_init(&bb->mutex);
+	file->private_data = bb;
+
+	/* open succeeded, put active reference and pin attr_sd */
+	sysfs_put_active(attr_sd);
+	sysfs_get(attr_sd);
+	return 0;
+
+ err_out:
+	sysfs_put_active(attr_sd);
+	kfree(bb);
 	return error;
 }
 
 static int release(struct inode * inode, struct file * file)
 {
-	struct kobject * kobj = to_kobj(file->f_path.dentry->d_parent);
-	struct bin_attribute * attr = to_bin_attr(file->f_path.dentry);
-	u8 * buffer = file->private_data;
-
-	kobject_put(kobj);
-	module_put(attr->attr.owner);
-	kfree(buffer);
+	struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
+	struct bin_buffer *bb = file->private_data;
+
+	if (bb->mmapped)
+		sysfs_put_active_two(attr_sd);
+	sysfs_put(attr_sd);
+	kfree(bb->buffer);
+	kfree(bb);
 	return 0;
 }
 
@@ -181,9 +234,9 @@ const struct file_operations bin_fops = {
 
 int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr)
 {
-	BUG_ON(!kobj || !kobj->dentry || !attr);
+	BUG_ON(!kobj || !kobj->sd || !attr);
 
-	return sysfs_add_file(kobj->dentry, &attr->attr, SYSFS_KOBJ_BIN_ATTR);
+	return sysfs_add_file(kobj->sd, &attr->attr, SYSFS_KOBJ_BIN_ATTR);
 }
 
 
@@ -195,7 +248,7 @@ int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr)
 
 void sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr)
 {
-	if (sysfs_hash_and_remove(kobj->dentry, attr->attr.name) < 0) {
+	if (sysfs_hash_and_remove(kobj->sd, attr->attr.name) < 0) {
 		printk(KERN_ERR "%s: "
 			"bad dentry or inode or no such file: \"%s\"\n",
 			__FUNCTION__, attr->attr.name);
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index c4342a0..aee966c 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -9,21 +9,337 @@
 #include <linux/module.h>
 #include <linux/kobject.h>
 #include <linux/namei.h>
+#include <linux/idr.h>
+#include <linux/completion.h>
 #include <asm/semaphore.h>
 #include "sysfs.h"
 
-DECLARE_RWSEM(sysfs_rename_sem);
-spinlock_t sysfs_lock = SPIN_LOCK_UNLOCKED;
+DEFINE_MUTEX(sysfs_mutex);
+spinlock_t sysfs_assoc_lock = SPIN_LOCK_UNLOCKED;
+
+static spinlock_t sysfs_ino_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_IDA(sysfs_ino_ida);
+
+/**
+ *	sysfs_link_sibling - link sysfs_dirent into sibling list
+ *	@sd: sysfs_dirent of interest
+ *
+ *	Link @sd into its sibling list which starts from
+ *	sd->s_parent->s_children.
+ *
+ *	Locking:
+ *	mutex_lock(sysfs_mutex)
+ */
+void sysfs_link_sibling(struct sysfs_dirent *sd)
+{
+	struct sysfs_dirent *parent_sd = sd->s_parent;
+
+	BUG_ON(sd->s_sibling);
+	sd->s_sibling = parent_sd->s_children;
+	parent_sd->s_children = sd;
+}
+
+/**
+ *	sysfs_unlink_sibling - unlink sysfs_dirent from sibling list
+ *	@sd: sysfs_dirent of interest
+ *
+ *	Unlink @sd from its sibling list which starts from
+ *	sd->s_parent->s_children.
+ *
+ *	Locking:
+ *	mutex_lock(sysfs_mutex)
+ */
+void sysfs_unlink_sibling(struct sysfs_dirent *sd)
+{
+	struct sysfs_dirent **pos;
+
+	for (pos = &sd->s_parent->s_children; *pos; pos = &(*pos)->s_sibling) {
+		if (*pos == sd) {
+			*pos = sd->s_sibling;
+			sd->s_sibling = NULL;
+			break;
+		}
+	}
+}
+
+/**
+ *	sysfs_get_dentry - get dentry for the given sysfs_dirent
+ *	@sd: sysfs_dirent of interest
+ *
+ *	Get dentry for @sd.  Dentry is looked up if currently not
+ *	present.  This function climbs sysfs_dirent tree till it
+ *	reaches a sysfs_dirent with valid dentry attached and descends
+ *	down from there looking up dentry for each step.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep)
+ *
+ *	RETURNS:
+ *	Pointer to found dentry on success, ERR_PTR() value on error.
+ */
+struct dentry *sysfs_get_dentry(struct sysfs_dirent *sd)
+{
+	struct sysfs_dirent *cur;
+	struct dentry *parent_dentry, *dentry;
+	int i, depth;
+
+	/* Find the first parent which has valid s_dentry and get the
+	 * dentry.
+	 */
+	mutex_lock(&sysfs_mutex);
+ restart0:
+	spin_lock(&sysfs_assoc_lock);
+ restart1:
+	spin_lock(&dcache_lock);
+
+	dentry = NULL;
+	depth = 0;
+	cur = sd;
+	while (!cur->s_dentry || !cur->s_dentry->d_inode) {
+		if (cur->s_flags & SYSFS_FLAG_REMOVED) {
+			dentry = ERR_PTR(-ENOENT);
+			depth = 0;
+			break;
+		}
+		cur = cur->s_parent;
+		depth++;
+	}
+	if (!IS_ERR(dentry))
+		dentry = dget_locked(cur->s_dentry);
+
+	spin_unlock(&dcache_lock);
+	spin_unlock(&sysfs_assoc_lock);
+
+	/* from the found dentry, look up depth times */
+	while (depth--) {
+		/* find and get depth'th ancestor */
+		for (cur = sd, i = 0; cur && i < depth; i++)
+			cur = cur->s_parent;
+
+		/* This can happen if tree structure was modified due
+		 * to move/rename.  Restart.
+		 */
+		if (i != depth) {
+			dput(dentry);
+			goto restart0;
+		}
+
+		sysfs_get(cur);
+
+		mutex_unlock(&sysfs_mutex);
+
+		/* look it up */
+		parent_dentry = dentry;
+		dentry = lookup_one_len_kern(cur->s_name, parent_dentry,
+					     strlen(cur->s_name));
+		dput(parent_dentry);
+
+		if (IS_ERR(dentry)) {
+			sysfs_put(cur);
+			return dentry;
+		}
+
+		mutex_lock(&sysfs_mutex);
+		spin_lock(&sysfs_assoc_lock);
+
+		/* This, again, can happen if tree structure has
+		 * changed and we looked up the wrong thing.  Restart.
+		 */
+		if (cur->s_dentry != dentry) {
+			dput(dentry);
+			sysfs_put(cur);
+			goto restart1;
+		}
+
+		spin_unlock(&sysfs_assoc_lock);
+
+		sysfs_put(cur);
+	}
+
+	mutex_unlock(&sysfs_mutex);
+	return dentry;
+}
+
+/**
+ *	sysfs_get_active - get an active reference to sysfs_dirent
+ *	@sd: sysfs_dirent to get an active reference to
+ *
+ *	Get an active reference of @sd.  This function is noop if @sd
+ *	is NULL.
+ *
+ *	RETURNS:
+ *	Pointer to @sd on success, NULL on failure.
+ */
+struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd)
+{
+	if (unlikely(!sd))
+		return NULL;
+
+	while (1) {
+		int v, t;
+
+		v = atomic_read(&sd->s_active);
+		if (unlikely(v < 0))
+			return NULL;
+
+		t = atomic_cmpxchg(&sd->s_active, v, v + 1);
+		if (likely(t == v))
+			return sd;
+		if (t < 0)
+			return NULL;
+
+		cpu_relax();
+	}
+}
+
+/**
+ *	sysfs_put_active - put an active reference to sysfs_dirent
+ *	@sd: sysfs_dirent to put an active reference to
+ *
+ *	Put an active reference to @sd.  This function is noop if @sd
+ *	is NULL.
+ */
+void sysfs_put_active(struct sysfs_dirent *sd)
+{
+	struct completion *cmpl;
+	int v;
+
+	if (unlikely(!sd))
+		return;
+
+	v = atomic_dec_return(&sd->s_active);
+	if (likely(v != SD_DEACTIVATED_BIAS))
+		return;
+
+	/* atomic_dec_return() is a mb(), we'll always see the updated
+	 * sd->s_sibling.
+	 */
+	cmpl = (void *)sd->s_sibling;
+	complete(cmpl);
+}
+
+/**
+ *	sysfs_get_active_two - get active references to sysfs_dirent and parent
+ *	@sd: sysfs_dirent of interest
+ *
+ *	Get active reference to @sd and its parent.  Parent's active
+ *	reference is grabbed first.  This function is noop if @sd is
+ *	NULL.
+ *
+ *	RETURNS:
+ *	Pointer to @sd on success, NULL on failure.
+ */
+struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd)
+{
+	if (sd) {
+		if (sd->s_parent && unlikely(!sysfs_get_active(sd->s_parent)))
+			return NULL;
+		if (unlikely(!sysfs_get_active(sd))) {
+			sysfs_put_active(sd->s_parent);
+			return NULL;
+		}
+	}
+	return sd;
+}
+
+/**
+ *	sysfs_put_active_two - put active references to sysfs_dirent and parent
+ *	@sd: sysfs_dirent of interest
+ *
+ *	Put active references to @sd and its parent.  This function is
+ *	noop if @sd is NULL.
+ */
+void sysfs_put_active_two(struct sysfs_dirent *sd)
+{
+	if (sd) {
+		sysfs_put_active(sd);
+		sysfs_put_active(sd->s_parent);
+	}
+}
+
+/**
+ *	sysfs_deactivate - deactivate sysfs_dirent
+ *	@sd: sysfs_dirent to deactivate
+ *
+ *	Deny new active references and drain existing ones.
+ */
+static void sysfs_deactivate(struct sysfs_dirent *sd)
+{
+	DECLARE_COMPLETION_ONSTACK(wait);
+	int v;
+
+	BUG_ON(sd->s_sibling || !(sd->s_flags & SYSFS_FLAG_REMOVED));
+	sd->s_sibling = (void *)&wait;
+
+	/* atomic_add_return() is a mb(), put_active() will always see
+	 * the updated sd->s_sibling.
+	 */
+	v = atomic_add_return(SD_DEACTIVATED_BIAS, &sd->s_active);
+
+	if (v != SD_DEACTIVATED_BIAS)
+		wait_for_completion(&wait);
+
+	sd->s_sibling = NULL;
+}
+
+static int sysfs_alloc_ino(ino_t *pino)
+{
+	int ino, rc;
+
+ retry:
+	spin_lock(&sysfs_ino_lock);
+	rc = ida_get_new_above(&sysfs_ino_ida, 2, &ino);
+	spin_unlock(&sysfs_ino_lock);
+
+	if (rc == -EAGAIN) {
+		if (ida_pre_get(&sysfs_ino_ida, GFP_KERNEL))
+			goto retry;
+		rc = -ENOMEM;
+	}
+
+	*pino = ino;
+	return rc;
+}
+
+static void sysfs_free_ino(ino_t ino)
+{
+	spin_lock(&sysfs_ino_lock);
+	ida_remove(&sysfs_ino_ida, ino);
+	spin_unlock(&sysfs_ino_lock);
+}
+
+void release_sysfs_dirent(struct sysfs_dirent * sd)
+{
+	struct sysfs_dirent *parent_sd;
+
+ repeat:
+	/* Moving/renaming is always done while holding reference.
+	 * sd->s_parent won't change beneath us.
+	 */
+	parent_sd = sd->s_parent;
+
+	if (sysfs_type(sd) == SYSFS_KOBJ_LINK)
+		sysfs_put(sd->s_elem.symlink.target_sd);
+	if (sysfs_type(sd) & SYSFS_COPY_NAME)
+		kfree(sd->s_name);
+	kfree(sd->s_iattr);
+	sysfs_free_ino(sd->s_ino);
+	kmem_cache_free(sysfs_dir_cachep, sd);
+
+	sd = parent_sd;
+	if (sd && atomic_dec_and_test(&sd->s_count))
+		goto repeat;
+}
 
 static void sysfs_d_iput(struct dentry * dentry, struct inode * inode)
 {
 	struct sysfs_dirent * sd = dentry->d_fsdata;
 
 	if (sd) {
-		/* sd->s_dentry is protected with sysfs_lock.  This
-		 * allows sysfs_drop_dentry() to dereference it.
+		/* sd->s_dentry is protected with sysfs_assoc_lock.
+		 * This allows sysfs_drop_dentry() to dereference it.
 		 */
-		spin_lock(&sysfs_lock);
+		spin_lock(&sysfs_assoc_lock);
 
 		/* The dentry might have been deleted or another
 		 * lookup could have happened updating sd->s_dentry to
@@ -32,7 +348,7 @@ static void sysfs_d_iput(struct dentry * dentry, struct inode * inode)
 		 */
 		if (sd->s_dentry == dentry)
 			sd->s_dentry = NULL;
-		spin_unlock(&sysfs_lock);
+		spin_unlock(&sysfs_assoc_lock);
 		sysfs_put(sd);
 	}
 	iput(inode);
@@ -42,260 +358,402 @@ static struct dentry_operations sysfs_dentry_ops = {
 	.d_iput		= sysfs_d_iput,
 };
 
-static unsigned int sysfs_inode_counter;
-ino_t sysfs_get_inum(void)
+struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type)
 {
-	if (unlikely(sysfs_inode_counter < 3))
-		sysfs_inode_counter = 3;
-	return sysfs_inode_counter++;
-}
+	char *dup_name = NULL;
+	struct sysfs_dirent *sd = NULL;
 
-/*
- * Allocates a new sysfs_dirent and links it to the parent sysfs_dirent
- */
-static struct sysfs_dirent * __sysfs_new_dirent(void * element)
-{
-	struct sysfs_dirent * sd;
+	if (type & SYSFS_COPY_NAME) {
+		name = dup_name = kstrdup(name, GFP_KERNEL);
+		if (!name)
+			goto err_out;
+	}
 
 	sd = kmem_cache_zalloc(sysfs_dir_cachep, GFP_KERNEL);
 	if (!sd)
-		return NULL;
+		goto err_out;
+
+	if (sysfs_alloc_ino(&sd->s_ino))
+		goto err_out;
 
-	sd->s_ino = sysfs_get_inum();
 	atomic_set(&sd->s_count, 1);
+	atomic_set(&sd->s_active, 0);
 	atomic_set(&sd->s_event, 1);
-	INIT_LIST_HEAD(&sd->s_children);
-	INIT_LIST_HEAD(&sd->s_sibling);
-	sd->s_element = element;
+
+	sd->s_name = name;
+	sd->s_mode = mode;
+	sd->s_flags = type;
 
 	return sd;
+
+ err_out:
+	kfree(dup_name);
+	kmem_cache_free(sysfs_dir_cachep, sd);
+	return NULL;
 }
 
-static void __sysfs_list_dirent(struct sysfs_dirent *parent_sd,
-			      struct sysfs_dirent *sd)
+/**
+ *	sysfs_attach_dentry - associate sysfs_dirent with dentry
+ *	@sd: target sysfs_dirent
+ *	@dentry: dentry to associate
+ *
+ *	Associate @sd with @dentry.  This is protected by
+ *	sysfs_assoc_lock to avoid race with sysfs_d_iput().
+ *
+ *	LOCKING:
+ *	mutex_lock(sysfs_mutex)
+ */
+static void sysfs_attach_dentry(struct sysfs_dirent *sd, struct dentry *dentry)
 {
-	if (sd)
-		list_add(&sd->s_sibling, &parent_sd->s_children);
+	dentry->d_op = &sysfs_dentry_ops;
+	dentry->d_fsdata = sysfs_get(sd);
+
+	/* protect sd->s_dentry against sysfs_d_iput */
+	spin_lock(&sysfs_assoc_lock);
+	sd->s_dentry = dentry;
+	spin_unlock(&sysfs_assoc_lock);
+
+	d_rehash(dentry);
 }
 
-static struct sysfs_dirent * sysfs_new_dirent(struct sysfs_dirent *parent_sd,
-						void * element)
+static int sysfs_ilookup_test(struct inode *inode, void *arg)
 {
-	struct sysfs_dirent *sd;
-	sd = __sysfs_new_dirent(element);
-	__sysfs_list_dirent(parent_sd, sd);
-	return sd;
+	struct sysfs_dirent *sd = arg;
+	return inode->i_ino == sd->s_ino;
 }
 
-/*
+/**
+ *	sysfs_addrm_start - prepare for sysfs_dirent add/remove
+ *	@acxt: pointer to sysfs_addrm_cxt to be used
+ *	@parent_sd: parent sysfs_dirent
  *
- * Return -EEXIST if there is already a sysfs element with the same name for
- * the same parent.
+ *	This function is called when the caller is about to add or
+ *	remove sysfs_dirent under @parent_sd.  This function acquires
+ *	sysfs_mutex, grabs inode for @parent_sd if available and lock
+ *	i_mutex of it.  @acxt is used to keep and pass context to
+ *	other addrm functions.
  *
- * called with parent inode's i_mutex held
+ *	LOCKING:
+ *	Kernel thread context (may sleep).  sysfs_mutex is locked on
+ *	return.  i_mutex of parent inode is locked on return if
+ *	available.
  */
-int sysfs_dirent_exist(struct sysfs_dirent *parent_sd,
-			  const unsigned char *new)
+void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt,
+		       struct sysfs_dirent *parent_sd)
 {
-	struct sysfs_dirent * sd;
+	struct inode *inode;
 
-	list_for_each_entry(sd, &parent_sd->s_children, s_sibling) {
-		if (sd->s_element) {
-			const unsigned char *existing = sysfs_get_name(sd);
-			if (strcmp(existing, new))
-				continue;
-			else
-				return -EEXIST;
-		}
-	}
+	memset(acxt, 0, sizeof(*acxt));
+	acxt->parent_sd = parent_sd;
 
-	return 0;
+	/* Lookup parent inode.  inode initialization and I_NEW
+	 * clearing are protected by sysfs_mutex.  By grabbing it and
+	 * looking up with _nowait variant, inode state can be
+	 * determined reliably.
+	 */
+	mutex_lock(&sysfs_mutex);
+
+	inode = ilookup5_nowait(sysfs_sb, parent_sd->s_ino, sysfs_ilookup_test,
+				parent_sd);
+
+	if (inode && !(inode->i_state & I_NEW)) {
+		/* parent inode available */
+		acxt->parent_inode = inode;
+
+		/* sysfs_mutex is below i_mutex in lock hierarchy.
+		 * First, trylock i_mutex.  If fails, unlock
+		 * sysfs_mutex and lock them in order.
+		 */
+		if (!mutex_trylock(&inode->i_mutex)) {
+			mutex_unlock(&sysfs_mutex);
+			mutex_lock(&inode->i_mutex);
+			mutex_lock(&sysfs_mutex);
+		}
+	} else
+		iput(inode);
 }
 
+/**
+ *	sysfs_add_one - add sysfs_dirent to parent
+ *	@acxt: addrm context to use
+ *	@sd: sysfs_dirent to be added
+ *
+ *	Get @acxt->parent_sd and set sd->s_parent to it and increment
+ *	nlink of parent inode if @sd is a directory.  @sd is NOT
+ *	linked into the children list of the parent.  The caller
+ *	should invoke sysfs_link_sibling() after this function
+ *	completes if @sd needs to be on the children list.
+ *
+ *	This function should be called between calls to
+ *	sysfs_addrm_start() and sysfs_addrm_finish() and should be
+ *	passed the same @acxt as passed to sysfs_addrm_start().
+ *
+ *	LOCKING:
+ *	Determined by sysfs_addrm_start().
+ */
+void sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd)
+{
+	sd->s_parent = sysfs_get(acxt->parent_sd);
+
+	if (sysfs_type(sd) == SYSFS_DIR && acxt->parent_inode)
+		inc_nlink(acxt->parent_inode);
+
+	acxt->cnt++;
+}
 
-static struct sysfs_dirent *
-__sysfs_make_dirent(struct dentry *dentry, void *element, mode_t mode, int type)
+/**
+ *	sysfs_remove_one - remove sysfs_dirent from parent
+ *	@acxt: addrm context to use
+ *	@sd: sysfs_dirent to be added
+ *
+ *	Mark @sd removed and drop nlink of parent inode if @sd is a
+ *	directory.  @sd is NOT unlinked from the children list of the
+ *	parent.  The caller is repsonsible for removing @sd from the
+ *	children list before calling this function.
+ *
+ *	This function should be called between calls to
+ *	sysfs_addrm_start() and sysfs_addrm_finish() and should be
+ *	passed the same @acxt as passed to sysfs_addrm_start().
+ *
+ *	LOCKING:
+ *	Determined by sysfs_addrm_start().
+ */
+void sysfs_remove_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd)
 {
-	struct sysfs_dirent * sd;
+	BUG_ON(sd->s_sibling || (sd->s_flags & SYSFS_FLAG_REMOVED));
 
-	sd = __sysfs_new_dirent(element);
-	if (!sd)
-		goto out;
+	sd->s_flags |= SYSFS_FLAG_REMOVED;
+	sd->s_sibling = acxt->removed;
+	acxt->removed = sd;
 
-	sd->s_mode = mode;
-	sd->s_type = type;
-	sd->s_dentry = dentry;
-	if (dentry) {
-		dentry->d_fsdata = sysfs_get(sd);
-		dentry->d_op = &sysfs_dentry_ops;
-	}
+	if (sysfs_type(sd) == SYSFS_DIR && acxt->parent_inode)
+		drop_nlink(acxt->parent_inode);
 
-out:
-	return sd;
+	acxt->cnt++;
 }
 
-int sysfs_make_dirent(struct sysfs_dirent * parent_sd, struct dentry * dentry,
-			void * element, umode_t mode, int type)
+/**
+ *	sysfs_drop_dentry - drop dentry for the specified sysfs_dirent
+ *	@sd: target sysfs_dirent
+ *
+ *	Drop dentry for @sd.  @sd must have been unlinked from its
+ *	parent on entry to this function such that it can't be looked
+ *	up anymore.
+ *
+ *	@sd->s_dentry which is protected with sysfs_assoc_lock points
+ *	to the currently associated dentry but we're not holding a
+ *	reference to it and racing with dput().  Grab dcache_lock and
+ *	verify dentry before dropping it.  If @sd->s_dentry is NULL or
+ *	dput() beats us, no need to bother.
+ */
+static void sysfs_drop_dentry(struct sysfs_dirent *sd)
 {
-	struct sysfs_dirent *sd;
+	struct dentry *dentry = NULL;
+	struct inode *inode;
+
+	/* We're not holding a reference to ->s_dentry dentry but the
+	 * field will stay valid as long as sysfs_assoc_lock is held.
+	 */
+	spin_lock(&sysfs_assoc_lock);
+	spin_lock(&dcache_lock);
+
+	/* drop dentry if it's there and dput() didn't kill it yet */
+	if (sd->s_dentry && sd->s_dentry->d_inode) {
+		dentry = dget_locked(sd->s_dentry);
+		spin_lock(&dentry->d_lock);
+		__d_drop(dentry);
+		spin_unlock(&dentry->d_lock);
+	}
 
-	sd = __sysfs_make_dirent(dentry, element, mode, type);
-	__sysfs_list_dirent(parent_sd, sd);
+	spin_unlock(&dcache_lock);
+	spin_unlock(&sysfs_assoc_lock);
 
-	return sd ? 0 : -ENOMEM;
+	/* dentries for shadowed inodes are pinned, unpin */
+	if (dentry && sysfs_is_shadowed_inode(dentry->d_inode))
+		dput(dentry);
+	dput(dentry);
+
+	/* adjust nlink and update timestamp */
+	inode = ilookup(sysfs_sb, sd->s_ino);
+	if (inode) {
+		mutex_lock(&inode->i_mutex);
+
+		inode->i_ctime = CURRENT_TIME;
+		drop_nlink(inode);
+		if (sysfs_type(sd) == SYSFS_DIR)
+			drop_nlink(inode);
+
+		mutex_unlock(&inode->i_mutex);
+		iput(inode);
+	}
 }
 
-static int init_dir(struct inode * inode)
+/**
+ *	sysfs_addrm_finish - finish up sysfs_dirent add/remove
+ *	@acxt: addrm context to finish up
+ *
+ *	Finish up sysfs_dirent add/remove.  Resources acquired by
+ *	sysfs_addrm_start() are released and removed sysfs_dirents are
+ *	cleaned up.  Timestamps on the parent inode are updated.
+ *
+ *	LOCKING:
+ *	All mutexes acquired by sysfs_addrm_start() are released.
+ *
+ *	RETURNS:
+ *	Number of added/removed sysfs_dirents since sysfs_addrm_start().
+ */
+int sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt)
 {
-	inode->i_op = &sysfs_dir_inode_operations;
-	inode->i_fop = &sysfs_dir_operations;
+	/* release resources acquired by sysfs_addrm_start() */
+	mutex_unlock(&sysfs_mutex);
+	if (acxt->parent_inode) {
+		struct inode *inode = acxt->parent_inode;
 
-	/* directory inodes start off with i_nlink == 2 (for "." entry) */
-	inc_nlink(inode);
-	return 0;
+		/* if added/removed, update timestamps on the parent */
+		if (acxt->cnt)
+			inode->i_ctime = inode->i_mtime = CURRENT_TIME;
+
+		mutex_unlock(&inode->i_mutex);
+		iput(inode);
+	}
+
+	/* kill removed sysfs_dirents */
+	while (acxt->removed) {
+		struct sysfs_dirent *sd = acxt->removed;
+
+		acxt->removed = sd->s_sibling;
+		sd->s_sibling = NULL;
+
+		sysfs_drop_dentry(sd);
+		sysfs_deactivate(sd);
+		sysfs_put(sd);
+	}
+
+	return acxt->cnt;
 }
 
-static int init_file(struct inode * inode)
+/**
+ *	sysfs_find_dirent - find sysfs_dirent with the given name
+ *	@parent_sd: sysfs_dirent to search under
+ *	@name: name to look for
+ *
+ *	Look for sysfs_dirent with name @name under @parent_sd.
+ *
+ *	LOCKING:
+ *	mutex_lock(sysfs_mutex)
+ *
+ *	RETURNS:
+ *	Pointer to sysfs_dirent if found, NULL if not.
+ */
+struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd,
+				       const unsigned char *name)
 {
-	inode->i_size = PAGE_SIZE;
-	inode->i_fop = &sysfs_file_operations;
-	return 0;
+	struct sysfs_dirent *sd;
+
+	for (sd = parent_sd->s_children; sd; sd = sd->s_sibling)
+		if (sysfs_type(sd) && !strcmp(sd->s_name, name))
+			return sd;
+	return NULL;
 }
 
-static int init_symlink(struct inode * inode)
+/**
+ *	sysfs_get_dirent - find and get sysfs_dirent with the given name
+ *	@parent_sd: sysfs_dirent to search under
+ *	@name: name to look for
+ *
+ *	Look for sysfs_dirent with name @name under @parent_sd and get
+ *	it if found.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).  Grabs sysfs_mutex.
+ *
+ *	RETURNS:
+ *	Pointer to sysfs_dirent if found, NULL if not.
+ */
+struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
+				      const unsigned char *name)
 {
-	inode->i_op = &sysfs_symlink_inode_operations;
-	return 0;
+	struct sysfs_dirent *sd;
+
+	mutex_lock(&sysfs_mutex);
+	sd = sysfs_find_dirent(parent_sd, name);
+	sysfs_get(sd);
+	mutex_unlock(&sysfs_mutex);
+
+	return sd;
 }
 
-static int create_dir(struct kobject * k, struct dentry * p,
-		      const char * n, struct dentry ** d)
+static int create_dir(struct kobject *kobj, struct sysfs_dirent *parent_sd,
+		      const char *name, struct sysfs_dirent **p_sd)
 {
-	int error;
 	umode_t mode = S_IFDIR| S_IRWXU | S_IRUGO | S_IXUGO;
+	struct sysfs_addrm_cxt acxt;
+	struct sysfs_dirent *sd;
 
-	mutex_lock(&p->d_inode->i_mutex);
-	*d = lookup_one_len(n, p, strlen(n));
-	if (!IS_ERR(*d)) {
- 		if (sysfs_dirent_exist(p->d_fsdata, n))
-  			error = -EEXIST;
-  		else
-			error = sysfs_make_dirent(p->d_fsdata, *d, k, mode,
-								SYSFS_DIR);
-		if (!error) {
-			error = sysfs_create(*d, mode, init_dir);
-			if (!error) {
-				inc_nlink(p->d_inode);
-				(*d)->d_op = &sysfs_dentry_ops;
-				d_rehash(*d);
-			}
-		}
-		if (error && (error != -EEXIST)) {
-			struct sysfs_dirent *sd = (*d)->d_fsdata;
-			if (sd) {
- 				list_del_init(&sd->s_sibling);
-				sysfs_put(sd);
-			}
-			d_drop(*d);
-		}
-		dput(*d);
-	} else
-		error = PTR_ERR(*d);
-	mutex_unlock(&p->d_inode->i_mutex);
-	return error;
-}
+	/* allocate */
+	sd = sysfs_new_dirent(name, mode, SYSFS_DIR);
+	if (!sd)
+		return -ENOMEM;
+	sd->s_elem.dir.kobj = kobj;
 
+	/* link in */
+	sysfs_addrm_start(&acxt, parent_sd);
+	if (!sysfs_find_dirent(parent_sd, name)) {
+		sysfs_add_one(&acxt, sd);
+		sysfs_link_sibling(sd);
+	}
+	if (sysfs_addrm_finish(&acxt)) {
+		*p_sd = sd;
+		return 0;
+	}
 
-int sysfs_create_subdir(struct kobject * k, const char * n, struct dentry ** d)
+	sysfs_put(sd);
+	return -EEXIST;
+}
+
+int sysfs_create_subdir(struct kobject *kobj, const char *name,
+			struct sysfs_dirent **p_sd)
 {
-	return create_dir(k,k->dentry,n,d);
+	return create_dir(kobj, kobj->sd, name, p_sd);
 }
 
 /**
  *	sysfs_create_dir - create a directory for an object.
  *	@kobj:		object we're creating directory for. 
- *	@shadow_parent:	parent parent object.
+ *	@shadow_parent:	parent object.
  */
-
-int sysfs_create_dir(struct kobject * kobj, struct dentry *shadow_parent)
+int sysfs_create_dir(struct kobject *kobj,
+		     struct sysfs_dirent *shadow_parent_sd)
 {
-	struct dentry * dentry = NULL;
-	struct dentry * parent;
+	struct sysfs_dirent *parent_sd, *sd;
 	int error = 0;
 
 	BUG_ON(!kobj);
 
-	if (shadow_parent)
-		parent = shadow_parent;
+	if (shadow_parent_sd)
+		parent_sd = shadow_parent_sd;
 	else if (kobj->parent)
-		parent = kobj->parent->dentry;
+		parent_sd = kobj->parent->sd;
 	else if (sysfs_mount && sysfs_mount->mnt_sb)
-		parent = sysfs_mount->mnt_sb->s_root;
+		parent_sd = sysfs_mount->mnt_sb->s_root->d_fsdata;
 	else
 		return -EFAULT;
 
-	error = create_dir(kobj,parent,kobject_name(kobj),&dentry);
+	error = create_dir(kobj, parent_sd, kobject_name(kobj), &sd);
 	if (!error)
-		kobj->dentry = dentry;
+		kobj->sd = sd;
 	return error;
 }
 
-/* attaches attribute's sysfs_dirent to the dentry corresponding to the
- * attribute file
- */
-static int sysfs_attach_attr(struct sysfs_dirent * sd, struct dentry * dentry)
+static int sysfs_count_nlink(struct sysfs_dirent *sd)
 {
-	struct attribute * attr = NULL;
-	struct bin_attribute * bin_attr = NULL;
-	int (* init) (struct inode *) = NULL;
-	int error = 0;
-
-        if (sd->s_type & SYSFS_KOBJ_BIN_ATTR) {
-                bin_attr = sd->s_element;
-                attr = &bin_attr->attr;
-        } else {
-                attr = sd->s_element;
-                init = init_file;
-        }
+	struct sysfs_dirent *child;
+	int nr = 0;
 
-	dentry->d_fsdata = sysfs_get(sd);
-	/* protect sd->s_dentry against sysfs_d_iput */
-	spin_lock(&sysfs_lock);
-	sd->s_dentry = dentry;
-	spin_unlock(&sysfs_lock);
-	error = sysfs_create(dentry, (attr->mode & S_IALLUGO) | S_IFREG, init);
-	if (error) {
-		sysfs_put(sd);
-		return error;
-	}
-
-        if (bin_attr) {
-		dentry->d_inode->i_size = bin_attr->size;
-		dentry->d_inode->i_fop = &bin_fops;
-	}
-	dentry->d_op = &sysfs_dentry_ops;
-	d_rehash(dentry);
-
-	return 0;
-}
-
-static int sysfs_attach_link(struct sysfs_dirent * sd, struct dentry * dentry)
-{
-	int err = 0;
-
-	dentry->d_fsdata = sysfs_get(sd);
-	/* protect sd->s_dentry against sysfs_d_iput */
-	spin_lock(&sysfs_lock);
-	sd->s_dentry = dentry;
-	spin_unlock(&sysfs_lock);
-	err = sysfs_create(dentry, S_IFLNK|S_IRWXUGO, init_symlink);
-	if (!err) {
-		dentry->d_op = &sysfs_dentry_ops;
-		d_rehash(dentry);
-	} else
-		sysfs_put(sd);
-
-	return err;
+	for (child = sd->s_children; child; child = child->s_sibling)
+		if (sysfs_type(child) == SYSFS_DIR)
+			nr++;
+	return nr + 2;
 }
 
 static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
@@ -303,24 +761,60 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
 {
 	struct sysfs_dirent * parent_sd = dentry->d_parent->d_fsdata;
 	struct sysfs_dirent * sd;
-	int err = 0;
+	struct bin_attribute *bin_attr;
+	struct inode *inode;
+	int found = 0;
 
-	list_for_each_entry(sd, &parent_sd->s_children, s_sibling) {
-		if (sd->s_type & SYSFS_NOT_PINNED) {
-			const unsigned char * name = sysfs_get_name(sd);
+	for (sd = parent_sd->s_children; sd; sd = sd->s_sibling) {
+		if (sysfs_type(sd) &&
+		    !strcmp(sd->s_name, dentry->d_name.name)) {
+			found = 1;
+			break;
+		}
+	}
 
-			if (strcmp(name, dentry->d_name.name))
-				continue;
+	/* no such entry */
+	if (!found)
+		return NULL;
 
-			if (sd->s_type & SYSFS_KOBJ_LINK)
-				err = sysfs_attach_link(sd, dentry);
-			else
-				err = sysfs_attach_attr(sd, dentry);
+	/* attach dentry and inode */
+	inode = sysfs_get_inode(sd);
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+
+	mutex_lock(&sysfs_mutex);
+
+	if (inode->i_state & I_NEW) {
+		/* initialize inode according to type */
+		switch (sysfs_type(sd)) {
+		case SYSFS_DIR:
+			inode->i_op = &sysfs_dir_inode_operations;
+			inode->i_fop = &sysfs_dir_operations;
+			inode->i_nlink = sysfs_count_nlink(sd);
+			break;
+		case SYSFS_KOBJ_ATTR:
+			inode->i_size = PAGE_SIZE;
+			inode->i_fop = &sysfs_file_operations;
+			break;
+		case SYSFS_KOBJ_BIN_ATTR:
+			bin_attr = sd->s_elem.bin_attr.bin_attr;
+			inode->i_size = bin_attr->size;
+			inode->i_fop = &bin_fops;
 			break;
+		case SYSFS_KOBJ_LINK:
+			inode->i_op = &sysfs_symlink_inode_operations;
+			break;
+		default:
+			BUG();
 		}
 	}
 
-	return ERR_PTR(err);
+	sysfs_instantiate(dentry, inode);
+	sysfs_attach_dentry(sd, dentry);
+
+	mutex_unlock(&sysfs_mutex);
+
+	return NULL;
 }
 
 const struct inode_operations sysfs_dir_inode_operations = {
@@ -328,58 +822,46 @@ const struct inode_operations sysfs_dir_inode_operations = {
 	.setattr	= sysfs_setattr,
 };
 
-static void remove_dir(struct dentry * d)
+static void remove_dir(struct sysfs_dirent *sd)
 {
-	struct dentry * parent = dget(d->d_parent);
-	struct sysfs_dirent * sd;
-
-	mutex_lock(&parent->d_inode->i_mutex);
-	d_delete(d);
-	sd = d->d_fsdata;
- 	list_del_init(&sd->s_sibling);
-	sysfs_put(sd);
-	if (d->d_inode)
-		simple_rmdir(parent->d_inode,d);
-
-	pr_debug(" o %s removing done (%d)\n",d->d_name.name,
-		 atomic_read(&d->d_count));
+	struct sysfs_addrm_cxt acxt;
 
-	mutex_unlock(&parent->d_inode->i_mutex);
-	dput(parent);
+	sysfs_addrm_start(&acxt, sd->s_parent);
+	sysfs_unlink_sibling(sd);
+	sysfs_remove_one(&acxt, sd);
+	sysfs_addrm_finish(&acxt);
 }
 
-void sysfs_remove_subdir(struct dentry * d)
+void sysfs_remove_subdir(struct sysfs_dirent *sd)
 {
-	remove_dir(d);
+	remove_dir(sd);
 }
 
 
-static void __sysfs_remove_dir(struct dentry *dentry)
+static void __sysfs_remove_dir(struct sysfs_dirent *dir_sd)
 {
-	struct sysfs_dirent * parent_sd;
-	struct sysfs_dirent * sd, * tmp;
+	struct sysfs_addrm_cxt acxt;
+	struct sysfs_dirent **pos;
 
-	dget(dentry);
-	if (!dentry)
+	if (!dir_sd)
 		return;
 
-	pr_debug("sysfs %s: removing dir\n",dentry->d_name.name);
-	mutex_lock(&dentry->d_inode->i_mutex);
-	parent_sd = dentry->d_fsdata;
-	list_for_each_entry_safe(sd, tmp, &parent_sd->s_children, s_sibling) {
-		if (!sd->s_element || !(sd->s_type & SYSFS_NOT_PINNED))
-			continue;
-		list_del_init(&sd->s_sibling);
-		sysfs_drop_dentry(sd, dentry);
-		sysfs_put(sd);
+	pr_debug("sysfs %s: removing dir\n", dir_sd->s_name);
+	sysfs_addrm_start(&acxt, dir_sd);
+	pos = &dir_sd->s_children;
+	while (*pos) {
+		struct sysfs_dirent *sd = *pos;
+
+		if (sysfs_type(sd) && sysfs_type(sd) != SYSFS_DIR) {
+			*pos = sd->s_sibling;
+			sd->s_sibling = NULL;
+			sysfs_remove_one(&acxt, sd);
+		} else
+			pos = &(*pos)->s_sibling;
 	}
-	mutex_unlock(&dentry->d_inode->i_mutex);
+	sysfs_addrm_finish(&acxt);
 
-	remove_dir(dentry);
-	/**
-	 * Drop reference from dget() on entrance.
-	 */
-	dput(dentry);
+	remove_dir(dir_sd);
 }
 
 /**
@@ -393,102 +875,166 @@ static void __sysfs_remove_dir(struct dentry *dentry)
 
 void sysfs_remove_dir(struct kobject * kobj)
 {
-	__sysfs_remove_dir(kobj->dentry);
-	kobj->dentry = NULL;
+	struct sysfs_dirent *sd = kobj->sd;
+
+	spin_lock(&sysfs_assoc_lock);
+	kobj->sd = NULL;
+	spin_unlock(&sysfs_assoc_lock);
+
+	__sysfs_remove_dir(sd);
 }
 
-int sysfs_rename_dir(struct kobject * kobj, struct dentry *new_parent,
+int sysfs_rename_dir(struct kobject *kobj, struct sysfs_dirent *new_parent_sd,
 		     const char *new_name)
 {
-	int error = 0;
-	struct dentry * new_dentry;
+	struct sysfs_dirent *sd = kobj->sd;
+	struct dentry *new_parent = NULL;
+	struct dentry *old_dentry = NULL, *new_dentry = NULL;
+	const char *dup_name = NULL;
+	int error;
 
-	if (!new_parent)
-		return -EFAULT;
+	/* get dentries */
+	old_dentry = sysfs_get_dentry(sd);
+	if (IS_ERR(old_dentry)) {
+		error = PTR_ERR(old_dentry);
+		goto out_dput;
+	}
 
-	down_write(&sysfs_rename_sem);
+	new_parent = sysfs_get_dentry(new_parent_sd);
+	if (IS_ERR(new_parent)) {
+		error = PTR_ERR(new_parent);
+		goto out_dput;
+	}
+
+	/* lock new_parent and get dentry for new name */
 	mutex_lock(&new_parent->d_inode->i_mutex);
 
 	new_dentry = lookup_one_len(new_name, new_parent, strlen(new_name));
-	if (!IS_ERR(new_dentry)) {
-		/* By allowing two different directories with the
-		 * same d_parent we allow this routine to move
-		 * between different shadows of the same directory
-		 */
-		if (kobj->dentry->d_parent->d_inode != new_parent->d_inode)
-			return -EINVAL;
-		else if (new_dentry->d_parent->d_inode != new_parent->d_inode)
-			error = -EINVAL;
-		else if (new_dentry == kobj->dentry)
-			error = -EINVAL;
-		else if (!new_dentry->d_inode) {
-			error = kobject_set_name(kobj, "%s", new_name);
-			if (!error) {
-				struct sysfs_dirent *sd, *parent_sd;
-
-				d_add(new_dentry, NULL);
-				d_move(kobj->dentry, new_dentry);
-
-				sd = kobj->dentry->d_fsdata;
-				parent_sd = new_parent->d_fsdata;
-
-				list_del_init(&sd->s_sibling);
-				list_add(&sd->s_sibling, &parent_sd->s_children);
-			}
-			else
-				d_drop(new_dentry);
-		} else
-			error = -EEXIST;
-		dput(new_dentry);
+	if (IS_ERR(new_dentry)) {
+		error = PTR_ERR(new_dentry);
+		goto out_unlock;
 	}
-	mutex_unlock(&new_parent->d_inode->i_mutex);
-	up_write(&sysfs_rename_sem);
 
+	/* By allowing two different directories with the same
+	 * d_parent we allow this routine to move between different
+	 * shadows of the same directory
+	 */
+	error = -EINVAL;
+	if (old_dentry->d_parent->d_inode != new_parent->d_inode ||
+	    new_dentry->d_parent->d_inode != new_parent->d_inode ||
+	    old_dentry == new_dentry)
+		goto out_unlock;
+
+	error = -EEXIST;
+	if (new_dentry->d_inode)
+		goto out_unlock;
+
+	/* rename kobject and sysfs_dirent */
+	error = -ENOMEM;
+	new_name = dup_name = kstrdup(new_name, GFP_KERNEL);
+	if (!new_name)
+		goto out_drop;
+
+	error = kobject_set_name(kobj, "%s", new_name);
+	if (error)
+		goto out_drop;
+
+	dup_name = sd->s_name;
+	sd->s_name = new_name;
+
+	/* move under the new parent */
+	d_add(new_dentry, NULL);
+	d_move(sd->s_dentry, new_dentry);
+
+	mutex_lock(&sysfs_mutex);
+
+	sysfs_unlink_sibling(sd);
+	sysfs_get(new_parent_sd);
+	sysfs_put(sd->s_parent);
+	sd->s_parent = new_parent_sd;
+	sysfs_link_sibling(sd);
+
+	mutex_unlock(&sysfs_mutex);
+
+	error = 0;
+	goto out_unlock;
+
+ out_drop:
+	d_drop(new_dentry);
+ out_unlock:
+	mutex_unlock(&new_parent->d_inode->i_mutex);
+ out_dput:
+	kfree(dup_name);
+	dput(new_parent);
+	dput(old_dentry);
+	dput(new_dentry);
 	return error;
 }
 
-int sysfs_move_dir(struct kobject *kobj, struct kobject *new_parent)
+int sysfs_move_dir(struct kobject *kobj, struct kobject *new_parent_kobj)
 {
-	struct dentry *old_parent_dentry, *new_parent_dentry, *new_dentry;
-	struct sysfs_dirent *new_parent_sd, *sd;
+	struct sysfs_dirent *sd = kobj->sd;
+	struct sysfs_dirent *new_parent_sd;
+	struct dentry *old_parent, *new_parent = NULL;
+	struct dentry *old_dentry = NULL, *new_dentry = NULL;
 	int error;
 
-	old_parent_dentry = kobj->parent ?
-		kobj->parent->dentry : sysfs_mount->mnt_sb->s_root;
-	new_parent_dentry = new_parent ?
-		new_parent->dentry : sysfs_mount->mnt_sb->s_root;
+	BUG_ON(!sd->s_parent);
+	new_parent_sd = new_parent_kobj->sd ? new_parent_kobj->sd : &sysfs_root;
+
+	/* get dentries */
+	old_dentry = sysfs_get_dentry(sd);
+	if (IS_ERR(old_dentry)) {
+		error = PTR_ERR(old_dentry);
+		goto out_dput;
+	}
+	old_parent = sd->s_parent->s_dentry;
+
+	new_parent = sysfs_get_dentry(new_parent_sd);
+	if (IS_ERR(new_parent)) {
+		error = PTR_ERR(new_parent);
+		goto out_dput;
+	}
 
-	if (old_parent_dentry->d_inode == new_parent_dentry->d_inode)
-		return 0;	/* nothing to move */
+	if (old_parent->d_inode == new_parent->d_inode) {
+		error = 0;
+		goto out_dput;	/* nothing to move */
+	}
 again:
-	mutex_lock(&old_parent_dentry->d_inode->i_mutex);
-	if (!mutex_trylock(&new_parent_dentry->d_inode->i_mutex)) {
-		mutex_unlock(&old_parent_dentry->d_inode->i_mutex);
+	mutex_lock(&old_parent->d_inode->i_mutex);
+	if (!mutex_trylock(&new_parent->d_inode->i_mutex)) {
+		mutex_unlock(&old_parent->d_inode->i_mutex);
 		goto again;
 	}
 
-	new_parent_sd = new_parent_dentry->d_fsdata;
-	sd = kobj->dentry->d_fsdata;
-
-	new_dentry = lookup_one_len(kobj->name, new_parent_dentry,
-				    strlen(kobj->name));
+	new_dentry = lookup_one_len(kobj->name, new_parent, strlen(kobj->name));
 	if (IS_ERR(new_dentry)) {
 		error = PTR_ERR(new_dentry);
-		goto out;
+		goto out_unlock;
 	} else
 		error = 0;
 	d_add(new_dentry, NULL);
-	d_move(kobj->dentry, new_dentry);
+	d_move(sd->s_dentry, new_dentry);
 	dput(new_dentry);
 
 	/* Remove from old parent's list and insert into new parent's list. */
-	list_del_init(&sd->s_sibling);
-	list_add(&sd->s_sibling, &new_parent_sd->s_children);
+	mutex_lock(&sysfs_mutex);
+
+	sysfs_unlink_sibling(sd);
+	sysfs_get(new_parent_sd);
+	sysfs_put(sd->s_parent);
+	sd->s_parent = new_parent_sd;
+	sysfs_link_sibling(sd);
 
-out:
-	mutex_unlock(&new_parent_dentry->d_inode->i_mutex);
-	mutex_unlock(&old_parent_dentry->d_inode->i_mutex);
+	mutex_unlock(&sysfs_mutex);
 
+ out_unlock:
+	mutex_unlock(&new_parent->d_inode->i_mutex);
+	mutex_unlock(&old_parent->d_inode->i_mutex);
+ out_dput:
+	dput(new_parent);
+	dput(old_dentry);
+	dput(new_dentry);
 	return error;
 }
 
@@ -496,23 +1042,27 @@ static int sysfs_dir_open(struct inode *inode, struct file *file)
 {
 	struct dentry * dentry = file->f_path.dentry;
 	struct sysfs_dirent * parent_sd = dentry->d_fsdata;
+	struct sysfs_dirent * sd;
 
-	mutex_lock(&dentry->d_inode->i_mutex);
-	file->private_data = sysfs_new_dirent(parent_sd, NULL);
-	mutex_unlock(&dentry->d_inode->i_mutex);
-
-	return file->private_data ? 0 : -ENOMEM;
+	sd = sysfs_new_dirent("_DIR_", 0, 0);
+	if (sd) {
+		mutex_lock(&sysfs_mutex);
+		sd->s_parent = sysfs_get(parent_sd);
+		sysfs_link_sibling(sd);
+		mutex_unlock(&sysfs_mutex);
+	}
 
+	file->private_data = sd;
+	return sd ? 0 : -ENOMEM;
 }
 
 static int sysfs_dir_close(struct inode *inode, struct file *file)
 {
-	struct dentry * dentry = file->f_path.dentry;
 	struct sysfs_dirent * cursor = file->private_data;
 
-	mutex_lock(&dentry->d_inode->i_mutex);
-	list_del_init(&cursor->s_sibling);
-	mutex_unlock(&dentry->d_inode->i_mutex);
+	mutex_lock(&sysfs_mutex);
+	sysfs_unlink_sibling(cursor);
+	mutex_unlock(&sysfs_mutex);
 
 	release_sysfs_dirent(cursor);
 
@@ -530,7 +1080,7 @@ static int sysfs_readdir(struct file * filp, void * dirent, filldir_t filldir)
 	struct dentry *dentry = filp->f_path.dentry;
 	struct sysfs_dirent * parent_sd = dentry->d_fsdata;
 	struct sysfs_dirent *cursor = filp->private_data;
-	struct list_head *p, *q = &cursor->s_sibling;
+	struct sysfs_dirent **pos;
 	ino_t ino;
 	int i = filp->f_pos;
 
@@ -543,38 +1093,52 @@ static int sysfs_readdir(struct file * filp, void * dirent, filldir_t filldir)
 			i++;
 			/* fallthrough */
 		case 1:
-			ino = parent_ino(dentry);
+			if (parent_sd->s_parent)
+				ino = parent_sd->s_parent->s_ino;
+			else
+				ino = parent_sd->s_ino;
 			if (filldir(dirent, "..", 2, i, ino, DT_DIR) < 0)
 				break;
 			filp->f_pos++;
 			i++;
 			/* fallthrough */
 		default:
+			mutex_lock(&sysfs_mutex);
+
+			pos = &parent_sd->s_children;
+			while (*pos != cursor)
+				pos = &(*pos)->s_sibling;
+
+			/* unlink cursor */
+			*pos = cursor->s_sibling;
+
 			if (filp->f_pos == 2)
-				list_move(q, &parent_sd->s_children);
+				pos = &parent_sd->s_children;
 
-			for (p=q->next; p!= &parent_sd->s_children; p=p->next) {
-				struct sysfs_dirent *next;
+			for ( ; *pos; pos = &(*pos)->s_sibling) {
+				struct sysfs_dirent *next = *pos;
 				const char * name;
 				int len;
 
-				next = list_entry(p, struct sysfs_dirent,
-						   s_sibling);
-				if (!next->s_element)
+				if (!sysfs_type(next))
 					continue;
 
-				name = sysfs_get_name(next);
+				name = next->s_name;
 				len = strlen(name);
 				ino = next->s_ino;
 
 				if (filldir(dirent, name, len, filp->f_pos, ino,
 						 dt_type(next)) < 0)
-					return 0;
+					break;
 
-				list_move(q, p);
-				p = q;
 				filp->f_pos++;
 			}
+
+			/* put cursor back in */
+			cursor->s_sibling = *pos;
+			*pos = cursor;
+
+			mutex_unlock(&sysfs_mutex);
 	}
 	return 0;
 }
@@ -583,7 +1147,6 @@ static loff_t sysfs_dir_lseek(struct file * file, loff_t offset, int origin)
 {
 	struct dentry * dentry = file->f_path.dentry;
 
-	mutex_lock(&dentry->d_inode->i_mutex);
 	switch (origin) {
 		case 1:
 			offset += file->f_pos;
@@ -591,31 +1154,35 @@ static loff_t sysfs_dir_lseek(struct file * file, loff_t offset, int origin)
 			if (offset >= 0)
 				break;
 		default:
-			mutex_unlock(&file->f_path.dentry->d_inode->i_mutex);
 			return -EINVAL;
 	}
 	if (offset != file->f_pos) {
+		mutex_lock(&sysfs_mutex);
+
 		file->f_pos = offset;
 		if (file->f_pos >= 2) {
 			struct sysfs_dirent *sd = dentry->d_fsdata;
 			struct sysfs_dirent *cursor = file->private_data;
-			struct list_head *p;
+			struct sysfs_dirent **pos;
 			loff_t n = file->f_pos - 2;
 
-			list_del(&cursor->s_sibling);
-			p = sd->s_children.next;
-			while (n && p != &sd->s_children) {
-				struct sysfs_dirent *next;
-				next = list_entry(p, struct sysfs_dirent,
-						   s_sibling);
-				if (next->s_element)
+			sysfs_unlink_sibling(cursor);
+
+			pos = &sd->s_children;
+			while (n && *pos) {
+				struct sysfs_dirent *next = *pos;
+				if (sysfs_type(next))
 					n--;
-				p = p->next;
+				pos = &(*pos)->s_sibling;
 			}
-			list_add_tail(&cursor->s_sibling, p);
+
+			cursor->s_sibling = *pos;
+			*pos = cursor;
 		}
+
+		mutex_unlock(&sysfs_mutex);
 	}
-	mutex_unlock(&dentry->d_inode->i_mutex);
+
 	return offset;
 }
 
@@ -628,12 +1195,20 @@ static loff_t sysfs_dir_lseek(struct file * file, loff_t offset, int origin)
 int sysfs_make_shadowed_dir(struct kobject *kobj,
 	void * (*follow_link)(struct dentry *, struct nameidata *))
 {
+	struct dentry *dentry;
 	struct inode *inode;
 	struct inode_operations *i_op;
 
-	inode = kobj->dentry->d_inode;
-	if (inode->i_op != &sysfs_dir_inode_operations)
+	/* get dentry for @kobj->sd, dentry of a shadowed dir is pinned */
+	dentry = sysfs_get_dentry(kobj->sd);
+	if (IS_ERR(dentry))
+		return PTR_ERR(dentry);
+
+	inode = dentry->d_inode;
+	if (inode->i_op != &sysfs_dir_inode_operations) {
+		dput(dentry);
 		return -EINVAL;
+	}
 
 	i_op = kmalloc(sizeof(*i_op), GFP_KERNEL);
 	if (!i_op)
@@ -658,54 +1233,72 @@ int sysfs_make_shadowed_dir(struct kobject *kobj,
  *	directory.
  */
 
-struct dentry *sysfs_create_shadow_dir(struct kobject *kobj)
+struct sysfs_dirent *sysfs_create_shadow_dir(struct kobject *kobj)
 {
-	struct sysfs_dirent *sd;
-	struct dentry *parent, *dir, *shadow;
+	struct sysfs_dirent *parent_sd = kobj->sd->s_parent;
+	struct dentry *dir, *parent, *shadow;
 	struct inode *inode;
+	struct sysfs_dirent *sd;
+	struct sysfs_addrm_cxt acxt;
 
-	dir = kobj->dentry;
-	inode = dir->d_inode;
+	dir = sysfs_get_dentry(kobj->sd);
+	if (IS_ERR(dir)) {
+		sd = (void *)dir;
+		goto out;
+	}
 	parent = dir->d_parent;
-	shadow = ERR_PTR(-EINVAL);
+
+	inode = dir->d_inode;
+	sd = ERR_PTR(-EINVAL);
 	if (!sysfs_is_shadowed_inode(inode))
-		goto out;
+		goto out_dput;
 
 	shadow = d_alloc(parent, &dir->d_name);
 	if (!shadow)
 		goto nomem;
 
-	sd = __sysfs_make_dirent(shadow, kobj, inode->i_mode, SYSFS_DIR);
+	sd = sysfs_new_dirent("_SHADOW_", inode->i_mode, SYSFS_DIR);
 	if (!sd)
 		goto nomem;
+	sd->s_elem.dir.kobj = kobj;
 
+	sysfs_addrm_start(&acxt, parent_sd);
+
+	/* add but don't link into children list */
+	sysfs_add_one(&acxt, sd);
+
+	/* attach and instantiate dentry */
+	sysfs_attach_dentry(sd, shadow);
 	d_instantiate(shadow, igrab(inode));
-	inc_nlink(inode);
-	inc_nlink(parent->d_inode);
-	shadow->d_op = &sysfs_dentry_ops;
+	inc_nlink(inode);	/* tj: synchronization? */
+
+	sysfs_addrm_finish(&acxt);
 
 	dget(shadow);		/* Extra count - pin the dentry in core */
 
-out:
-	return shadow;
-nomem:
+	goto out_dput;
+
+ nomem:
 	dput(shadow);
-	shadow = ERR_PTR(-ENOMEM);
-	goto out;
+	sd = ERR_PTR(-ENOMEM);
+ out_dput:
+	dput(dir);
+ out:
+	return sd;
 }
 
 /**
  *	sysfs_remove_shadow_dir - remove an object's directory.
- *	@shadow: dentry of shadow directory
+ *	@shadow_sd: sysfs_dirent of shadow directory
  *
  *	The only thing special about this is that we remove any files in
  *	the directory before we remove the directory, and we've inlined
  *	what used to be sysfs_rmdir() below, instead of calling separately.
  */
 
-void sysfs_remove_shadow_dir(struct dentry *shadow)
+void sysfs_remove_shadow_dir(struct sysfs_dirent *shadow_sd)
 {
-	__sysfs_remove_dir(shadow);
+	__sysfs_remove_dir(shadow_sd);
 }
 
 const struct file_operations sysfs_dir_operations = {
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index b502c71..cc49799 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -50,29 +50,15 @@ static struct sysfs_ops subsys_sysfs_ops = {
 	.store	= subsys_attr_store,
 };
 
-/**
- *	add_to_collection - add buffer to a collection
- *	@buffer:	buffer to be added
- *	@node:		inode of set to add to
- */
-
-static inline void
-add_to_collection(struct sysfs_buffer *buffer, struct inode *node)
-{
-	struct sysfs_buffer_collection *set = node->i_private;
-
-	mutex_lock(&node->i_mutex);
-	list_add(&buffer->associates, &set->associates);
-	mutex_unlock(&node->i_mutex);
-}
-
-static inline void
-remove_from_collection(struct sysfs_buffer *buffer, struct inode *node)
-{
-	mutex_lock(&node->i_mutex);
-	list_del(&buffer->associates);
-	mutex_unlock(&node->i_mutex);
-}
+struct sysfs_buffer {
+	size_t			count;
+	loff_t			pos;
+	char			* page;
+	struct sysfs_ops	* ops;
+	struct semaphore	sem;
+	int			needs_read_fill;
+	int			event;
+};
 
 /**
  *	fill_read_buffer - allocate and fill buffer from object.
@@ -87,9 +73,8 @@ remove_from_collection(struct sysfs_buffer *buffer, struct inode *node)
  */
 static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer)
 {
-	struct sysfs_dirent * sd = dentry->d_fsdata;
-	struct attribute * attr = to_attr(dentry);
-	struct kobject * kobj = to_kobj(dentry->d_parent);
+	struct sysfs_dirent *attr_sd = dentry->d_fsdata;
+	struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
 	struct sysfs_ops * ops = buffer->ops;
 	int ret = 0;
 	ssize_t count;
@@ -99,8 +84,15 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer
 	if (!buffer->page)
 		return -ENOMEM;
 
-	buffer->event = atomic_read(&sd->s_event);
-	count = ops->show(kobj,attr,buffer->page);
+	/* need attr_sd for attr and ops, its parent for kobj */
+	if (!sysfs_get_active_two(attr_sd))
+		return -ENODEV;
+
+	buffer->event = atomic_read(&attr_sd->s_event);
+	count = ops->show(kobj, attr_sd->s_elem.attr.attr, buffer->page);
+
+	sysfs_put_active_two(attr_sd);
+
 	BUG_ON(count > (ssize_t)PAGE_SIZE);
 	if (count >= 0) {
 		buffer->needs_read_fill = 0;
@@ -138,10 +130,7 @@ sysfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 
 	down(&buffer->sem);
 	if (buffer->needs_read_fill) {
-		if (buffer->orphaned)
-			retval = -ENODEV;
-		else
-			retval = fill_read_buffer(file->f_path.dentry,buffer);
+		retval = fill_read_buffer(file->f_path.dentry,buffer);
 		if (retval)
 			goto out;
 	}
@@ -196,14 +185,23 @@ fill_write_buffer(struct sysfs_buffer * buffer, const char __user * buf, size_t
  *	passing the buffer that we acquired in fill_write_buffer().
  */
 
-static int 
+static int
 flush_write_buffer(struct dentry * dentry, struct sysfs_buffer * buffer, size_t count)
 {
-	struct attribute * attr = to_attr(dentry);
-	struct kobject * kobj = to_kobj(dentry->d_parent);
+	struct sysfs_dirent *attr_sd = dentry->d_fsdata;
+	struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
 	struct sysfs_ops * ops = buffer->ops;
+	int rc;
+
+	/* need attr_sd for attr and ops, its parent for kobj */
+	if (!sysfs_get_active_two(attr_sd))
+		return -ENODEV;
+
+	rc = ops->store(kobj, attr_sd->s_elem.attr.attr, buffer->page, count);
 
-	return ops->store(kobj,attr,buffer->page,count);
+	sysfs_put_active_two(attr_sd);
+
+	return rc;
 }
 
 
@@ -231,37 +229,26 @@ sysfs_write_file(struct file *file, const char __user *buf, size_t count, loff_t
 	ssize_t len;
 
 	down(&buffer->sem);
-	if (buffer->orphaned) {
-		len = -ENODEV;
-		goto out;
-	}
 	len = fill_write_buffer(buffer, buf, count);
 	if (len > 0)
 		len = flush_write_buffer(file->f_path.dentry, buffer, len);
 	if (len > 0)
 		*ppos += len;
-out:
 	up(&buffer->sem);
 	return len;
 }
 
 static int sysfs_open_file(struct inode *inode, struct file *file)
 {
-	struct kobject *kobj = sysfs_get_kobject(file->f_path.dentry->d_parent);
-	struct attribute * attr = to_attr(file->f_path.dentry);
-	struct sysfs_buffer_collection *set;
+	struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;
+	struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
 	struct sysfs_buffer * buffer;
 	struct sysfs_ops * ops = NULL;
-	int error = 0;
-
-	if (!kobj || !attr)
-		goto Einval;
+	int error;
 
-	/* Grab the module reference for this attribute if we have one */
-	if (!try_module_get(attr->owner)) {
-		error = -ENODEV;
-		goto Done;
-	}
+	/* need attr_sd for attr and ops, its parent for kobj */
+	if (!sysfs_get_active_two(attr_sd))
+		return -ENODEV;
 
 	/* if the kobject has no ktype, then we assume that it is a subsystem
 	 * itself, and use ops for it.
@@ -273,33 +260,21 @@ static int sysfs_open_file(struct inode *inode, struct file *file)
 	else
 		ops = &subsys_sysfs_ops;
 
+	error = -EACCES;
+
 	/* No sysfs operations, either from having no subsystem,
 	 * or the subsystem have no operations.
 	 */
 	if (!ops)
-		goto Eaccess;
-
-	/* make sure we have a collection to add our buffers to */
-	mutex_lock(&inode->i_mutex);
-	if (!(set = inode->i_private)) {
-		if (!(set = inode->i_private = kmalloc(sizeof(struct sysfs_buffer_collection), GFP_KERNEL))) {
-			error = -ENOMEM;
-			goto Done;
-		} else {
-			INIT_LIST_HEAD(&set->associates);
-		}
-	}
-	mutex_unlock(&inode->i_mutex);
+		goto err_out;
 
 	/* File needs write support.
 	 * The inode's perms must say it's ok, 
 	 * and we must have a store method.
 	 */
 	if (file->f_mode & FMODE_WRITE) {
-
 		if (!(inode->i_mode & S_IWUGO) || !ops->store)
-			goto Eaccess;
-
+			goto err_out;
 	}
 
 	/* File needs read support.
@@ -308,48 +283,38 @@ static int sysfs_open_file(struct inode *inode, struct file *file)
 	 */
 	if (file->f_mode & FMODE_READ) {
 		if (!(inode->i_mode & S_IRUGO) || !ops->show)
-			goto Eaccess;
+			goto err_out;
 	}
 
 	/* No error? Great, allocate a buffer for the file, and store it
 	 * it in file->private_data for easy access.
 	 */
+	error = -ENOMEM;
 	buffer = kzalloc(sizeof(struct sysfs_buffer), GFP_KERNEL);
-	if (buffer) {
-		INIT_LIST_HEAD(&buffer->associates);
-		init_MUTEX(&buffer->sem);
-		buffer->needs_read_fill = 1;
-		buffer->ops = ops;
-		add_to_collection(buffer, inode);
-		file->private_data = buffer;
-	} else
-		error = -ENOMEM;
-	goto Done;
-
- Einval:
-	error = -EINVAL;
-	goto Done;
- Eaccess:
-	error = -EACCES;
-	module_put(attr->owner);
- Done:
-	if (error)
-		kobject_put(kobj);
+	if (!buffer)
+		goto err_out;
+
+	init_MUTEX(&buffer->sem);
+	buffer->needs_read_fill = 1;
+	buffer->ops = ops;
+	file->private_data = buffer;
+
+	/* open succeeded, put active references and pin attr_sd */
+	sysfs_put_active_two(attr_sd);
+	sysfs_get(attr_sd);
+	return 0;
+
+ err_out:
+	sysfs_put_active_two(attr_sd);
 	return error;
 }
 
 static int sysfs_release(struct inode * inode, struct file * filp)
 {
-	struct kobject * kobj = to_kobj(filp->f_path.dentry->d_parent);
-	struct attribute * attr = to_attr(filp->f_path.dentry);
-	struct module * owner = attr->owner;
-	struct sysfs_buffer * buffer = filp->private_data;
+	struct sysfs_dirent *attr_sd = filp->f_path.dentry->d_fsdata;
+	struct sysfs_buffer *buffer = filp->private_data;
 
-	if (buffer)
-		remove_from_collection(buffer, inode);
-	kobject_put(kobj);
-	/* After this point, attr should not be accessed. */
-	module_put(owner);
+	sysfs_put(attr_sd);
 
 	if (buffer) {
 		if (buffer->page)
@@ -376,57 +341,43 @@ static int sysfs_release(struct inode * inode, struct file * filp)
 static unsigned int sysfs_poll(struct file *filp, poll_table *wait)
 {
 	struct sysfs_buffer * buffer = filp->private_data;
-	struct kobject * kobj = to_kobj(filp->f_path.dentry->d_parent);
-	struct sysfs_dirent * sd = filp->f_path.dentry->d_fsdata;
-	int res = 0;
+	struct sysfs_dirent *attr_sd = filp->f_path.dentry->d_fsdata;
+	struct kobject *kobj = attr_sd->s_parent->s_elem.dir.kobj;
+
+	/* need parent for the kobj, grab both */
+	if (!sysfs_get_active_two(attr_sd))
+		goto trigger;
 
 	poll_wait(filp, &kobj->poll, wait);
 
-	if (buffer->event != atomic_read(&sd->s_event)) {
-		res = POLLERR|POLLPRI;
-		buffer->needs_read_fill = 1;
-	}
+	sysfs_put_active_two(attr_sd);
 
-	return res;
-}
+	if (buffer->event != atomic_read(&attr_sd->s_event))
+		goto trigger;
 
+	return 0;
 
-static struct dentry *step_down(struct dentry *dir, const char * name)
-{
-	struct dentry * de;
-
-	if (dir == NULL || dir->d_inode == NULL)
-		return NULL;
-
-	mutex_lock(&dir->d_inode->i_mutex);
-	de = lookup_one_len(name, dir, strlen(name));
-	mutex_unlock(&dir->d_inode->i_mutex);
-	dput(dir);
-	if (IS_ERR(de))
-		return NULL;
-	if (de->d_inode == NULL) {
-		dput(de);
-		return NULL;
-	}
-	return de;
+ trigger:
+	buffer->needs_read_fill = 1;
+	return POLLERR|POLLPRI;
 }
 
-void sysfs_notify(struct kobject * k, char *dir, char *attr)
+void sysfs_notify(struct kobject *k, char *dir, char *attr)
 {
-	struct dentry *de = k->dentry;
-	if (de)
-		dget(de);
-	if (de && dir)
-		de = step_down(de, dir);
-	if (de && attr)
-		de = step_down(de, attr);
-	if (de) {
-		struct sysfs_dirent * sd = de->d_fsdata;
-		if (sd)
-			atomic_inc(&sd->s_event);
+	struct sysfs_dirent *sd = k->sd;
+
+	mutex_lock(&sysfs_mutex);
+
+	if (sd && dir)
+		sd = sysfs_find_dirent(sd, dir);
+	if (sd && attr)
+		sd = sysfs_find_dirent(sd, attr);
+	if (sd) {
+		atomic_inc(&sd->s_event);
 		wake_up_interruptible(&k->poll);
-		dput(de);
 	}
+
+	mutex_unlock(&sysfs_mutex);
 }
 EXPORT_SYMBOL_GPL(sysfs_notify);
 
@@ -440,19 +391,30 @@ const struct file_operations sysfs_file_operations = {
 };
 
 
-int sysfs_add_file(struct dentry * dir, const struct attribute * attr, int type)
+int sysfs_add_file(struct sysfs_dirent *dir_sd, const struct attribute *attr,
+		   int type)
 {
-	struct sysfs_dirent * parent_sd = dir->d_fsdata;
 	umode_t mode = (attr->mode & S_IALLUGO) | S_IFREG;
-	int error = -EEXIST;
+	struct sysfs_addrm_cxt acxt;
+	struct sysfs_dirent *sd;
 
-	mutex_lock(&dir->d_inode->i_mutex);
-	if (!sysfs_dirent_exist(parent_sd, attr->name))
-		error = sysfs_make_dirent(parent_sd, NULL, (void *)attr,
-					  mode, type);
-	mutex_unlock(&dir->d_inode->i_mutex);
+	sd = sysfs_new_dirent(attr->name, mode, type);
+	if (!sd)
+		return -ENOMEM;
+	sd->s_elem.attr.attr = (void *)attr;
 
-	return error;
+	sysfs_addrm_start(&acxt, dir_sd);
+
+	if (!sysfs_find_dirent(dir_sd, attr->name)) {
+		sysfs_add_one(&acxt, sd);
+		sysfs_link_sibling(sd);
+	}
+
+	if (sysfs_addrm_finish(&acxt))
+		return 0;
+
+	sysfs_put(sd);
+	return -EEXIST;
 }
 
 
@@ -464,9 +426,9 @@ int sysfs_add_file(struct dentry * dir, const struct attribute * attr, int type)
 
 int sysfs_create_file(struct kobject * kobj, const struct attribute * attr)
 {
-	BUG_ON(!kobj || !kobj->dentry || !attr);
+	BUG_ON(!kobj || !kobj->sd || !attr);
 
-	return sysfs_add_file(kobj->dentry, attr, SYSFS_KOBJ_ATTR);
+	return sysfs_add_file(kobj->sd, attr, SYSFS_KOBJ_ATTR);
 
 }
 
@@ -480,16 +442,16 @@ int sysfs_create_file(struct kobject * kobj, const struct attribute * attr)
 int sysfs_add_file_to_group(struct kobject *kobj,
 		const struct attribute *attr, const char *group)
 {
-	struct dentry *dir;
+	struct sysfs_dirent *dir_sd;
 	int error;
 
-	dir = lookup_one_len(group, kobj->dentry, strlen(group));
-	if (IS_ERR(dir))
-		error = PTR_ERR(dir);
-	else {
-		error = sysfs_add_file(dir, attr, SYSFS_KOBJ_ATTR);
-		dput(dir);
-	}
+	dir_sd = sysfs_get_dirent(kobj->sd, group);
+	if (!dir_sd)
+		return -ENOENT;
+
+	error = sysfs_add_file(dir_sd, attr, SYSFS_KOBJ_ATTR);
+	sysfs_put(dir_sd);
+
 	return error;
 }
 EXPORT_SYMBOL_GPL(sysfs_add_file_to_group);
@@ -502,30 +464,31 @@ EXPORT_SYMBOL_GPL(sysfs_add_file_to_group);
  */
 int sysfs_update_file(struct kobject * kobj, const struct attribute * attr)
 {
-	struct dentry * dir = kobj->dentry;
-	struct dentry * victim;
-	int res = -ENOENT;
-
-	mutex_lock(&dir->d_inode->i_mutex);
-	victim = lookup_one_len(attr->name, dir, strlen(attr->name));
-	if (!IS_ERR(victim)) {
-		/* make sure dentry is really there */
-		if (victim->d_inode && 
-		    (victim->d_parent->d_inode == dir->d_inode)) {
-			victim->d_inode->i_mtime = CURRENT_TIME;
-			fsnotify_modify(victim);
-			res = 0;
-		} else
-			d_drop(victim);
-		
-		/**
-		 * Drop the reference acquired from lookup_one_len() above.
-		 */
-		dput(victim);
+	struct sysfs_dirent *victim_sd = NULL;
+	struct dentry *victim = NULL;
+	int rc;
+
+	rc = -ENOENT;
+	victim_sd = sysfs_get_dirent(kobj->sd, attr->name);
+	if (!victim_sd)
+		goto out;
+
+	victim = sysfs_get_dentry(victim_sd);
+	if (IS_ERR(victim)) {
+		rc = PTR_ERR(victim);
+		victim = NULL;
+		goto out;
 	}
-	mutex_unlock(&dir->d_inode->i_mutex);
 
-	return res;
+	mutex_lock(&victim->d_inode->i_mutex);
+	victim->d_inode->i_mtime = CURRENT_TIME;
+	fsnotify_modify(victim);
+	mutex_unlock(&victim->d_inode->i_mutex);
+	rc = 0;
+ out:
+	dput(victim);
+	sysfs_put(victim_sd);
+	return rc;
 }
 
 
@@ -538,30 +501,34 @@ int sysfs_update_file(struct kobject * kobj, const struct attribute * attr)
  */
 int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
 {
-	struct dentry *dir = kobj->dentry;
-	struct dentry *victim;
+	struct sysfs_dirent *victim_sd = NULL;
+	struct dentry *victim = NULL;
 	struct inode * inode;
 	struct iattr newattrs;
-	int res = -ENOENT;
-
-	mutex_lock(&dir->d_inode->i_mutex);
-	victim = lookup_one_len(attr->name, dir, strlen(attr->name));
-	if (!IS_ERR(victim)) {
-		if (victim->d_inode &&
-		    (victim->d_parent->d_inode == dir->d_inode)) {
-			inode = victim->d_inode;
-			mutex_lock(&inode->i_mutex);
-			newattrs.ia_mode = (mode & S_IALLUGO) |
-						(inode->i_mode & ~S_IALLUGO);
-			newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
-			res = notify_change(victim, &newattrs);
-			mutex_unlock(&inode->i_mutex);
-		}
-		dput(victim);
+	int rc;
+
+	rc = -ENOENT;
+	victim_sd = sysfs_get_dirent(kobj->sd, attr->name);
+	if (!victim_sd)
+		goto out;
+
+	victim = sysfs_get_dentry(victim_sd);
+	if (IS_ERR(victim)) {
+		rc = PTR_ERR(victim);
+		victim = NULL;
+		goto out;
 	}
-	mutex_unlock(&dir->d_inode->i_mutex);
 
-	return res;
+	inode = victim->d_inode;
+	mutex_lock(&inode->i_mutex);
+	newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
+	newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
+	rc = notify_change(victim, &newattrs);
+	mutex_unlock(&inode->i_mutex);
+ out:
+	dput(victim);
+	sysfs_put(victim_sd);
+	return rc;
 }
 EXPORT_SYMBOL_GPL(sysfs_chmod_file);
 
@@ -576,7 +543,7 @@ EXPORT_SYMBOL_GPL(sysfs_chmod_file);
 
 void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr)
 {
-	sysfs_hash_and_remove(kobj->dentry, attr->name);
+	sysfs_hash_and_remove(kobj->sd, attr->name);
 }
 
 
@@ -589,12 +556,12 @@ void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr)
 void sysfs_remove_file_from_group(struct kobject *kobj,
 		const struct attribute *attr, const char *group)
 {
-	struct dentry *dir;
+	struct sysfs_dirent *dir_sd;
 
-	dir = lookup_one_len(group, kobj->dentry, strlen(group));
-	if (!IS_ERR(dir)) {
-		sysfs_hash_and_remove(dir, attr->name);
-		dput(dir);
+	dir_sd = sysfs_get_dirent(kobj->sd, group);
+	if (dir_sd) {
+		sysfs_hash_and_remove(dir_sd, attr->name);
+		sysfs_put(dir_sd);
 	}
 }
 EXPORT_SYMBOL_GPL(sysfs_remove_file_from_group);
diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
index 52eed2a..f318b73 100644
--- a/fs/sysfs/group.c
+++ b/fs/sysfs/group.c
@@ -18,26 +18,25 @@
 #include "sysfs.h"
 
 
-static void remove_files(struct dentry * dir, 
-			 const struct attribute_group * grp)
+static void remove_files(struct sysfs_dirent *dir_sd,
+			 const struct attribute_group *grp)
 {
 	struct attribute *const* attr;
 
 	for (attr = grp->attrs; *attr; attr++)
-		sysfs_hash_and_remove(dir,(*attr)->name);
+		sysfs_hash_and_remove(dir_sd, (*attr)->name);
 }
 
-static int create_files(struct dentry * dir,
-			const struct attribute_group * grp)
+static int create_files(struct sysfs_dirent *dir_sd,
+			const struct attribute_group *grp)
 {
 	struct attribute *const* attr;
 	int error = 0;
 
-	for (attr = grp->attrs; *attr && !error; attr++) {
-		error = sysfs_add_file(dir, *attr, SYSFS_KOBJ_ATTR);
-	}
+	for (attr = grp->attrs; *attr && !error; attr++)
+		error = sysfs_add_file(dir_sd, *attr, SYSFS_KOBJ_ATTR);
 	if (error)
-		remove_files(dir,grp);
+		remove_files(dir_sd, grp);
 	return error;
 }
 
@@ -45,44 +44,44 @@ static int create_files(struct dentry * dir,
 int sysfs_create_group(struct kobject * kobj, 
 		       const struct attribute_group * grp)
 {
-	struct dentry * dir;
+	struct sysfs_dirent *sd;
 	int error;
 
-	BUG_ON(!kobj || !kobj->dentry);
+	BUG_ON(!kobj || !kobj->sd);
 
 	if (grp->name) {
-		error = sysfs_create_subdir(kobj,grp->name,&dir);
+		error = sysfs_create_subdir(kobj, grp->name, &sd);
 		if (error)
 			return error;
 	} else
-		dir = kobj->dentry;
-	dir = dget(dir);
-	if ((error = create_files(dir,grp))) {
+		sd = kobj->sd;
+	sysfs_get(sd);
+	error = create_files(sd, grp);
+	if (error) {
 		if (grp->name)
-			sysfs_remove_subdir(dir);
+			sysfs_remove_subdir(sd);
 	}
-	dput(dir);
+	sysfs_put(sd);
 	return error;
 }
 
 void sysfs_remove_group(struct kobject * kobj, 
 			const struct attribute_group * grp)
 {
-	struct dentry * dir;
+	struct sysfs_dirent *dir_sd = kobj->sd;
+	struct sysfs_dirent *sd;
 
 	if (grp->name) {
-		dir = lookup_one_len_kern(grp->name, kobj->dentry,
-				strlen(grp->name));
-		BUG_ON(IS_ERR(dir));
-	}
-	else
-		dir = dget(kobj->dentry);
+		sd = sysfs_get_dirent(dir_sd, grp->name);
+		BUG_ON(!sd);
+	} else
+		sd = sysfs_get(dir_sd);
 
-	remove_files(dir,grp);
+	remove_files(sd, grp);
 	if (grp->name)
-		sysfs_remove_subdir(dir);
-	/* release the ref. taken in this routine */
-	dput(dir);
+		sysfs_remove_subdir(sd);
+
+	sysfs_put(sd);
 }
 
 
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index 5266eec..3756e15 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -133,187 +133,94 @@ static inline void set_inode_attr(struct inode * inode, struct iattr * iattr)
  */
 static struct lock_class_key sysfs_inode_imutex_key;
 
-struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent * sd)
+void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode)
 {
-	struct inode * inode = new_inode(sysfs_sb);
-	if (inode) {
-		inode->i_blocks = 0;
-		inode->i_mapping->a_ops = &sysfs_aops;
-		inode->i_mapping->backing_dev_info = &sysfs_backing_dev_info;
-		inode->i_op = &sysfs_inode_operations;
-		inode->i_ino = sd->s_ino;
-		lockdep_set_class(&inode->i_mutex, &sysfs_inode_imutex_key);
-
-		if (sd->s_iattr) {
-			/* sysfs_dirent has non-default attributes
-			 * get them for the new inode from persistent copy
-			 * in sysfs_dirent
-			 */
-			set_inode_attr(inode, sd->s_iattr);
-		} else
-			set_default_inode_attr(inode, mode);
-	}
-	return inode;
-}
-
-int sysfs_create(struct dentry * dentry, int mode, int (*init)(struct inode *))
-{
-	int error = 0;
-	struct inode * inode = NULL;
-	if (dentry) {
-		if (!dentry->d_inode) {
-			struct sysfs_dirent * sd = dentry->d_fsdata;
-			if ((inode = sysfs_new_inode(mode, sd))) {
-				if (dentry->d_parent && dentry->d_parent->d_inode) {
-					struct inode *p_inode = dentry->d_parent->d_inode;
-					p_inode->i_mtime = p_inode->i_ctime = CURRENT_TIME;
-				}
-				goto Proceed;
-			}
-			else 
-				error = -ENOMEM;
-		} else
-			error = -EEXIST;
-	} else 
-		error = -ENOENT;
-	goto Done;
-
- Proceed:
-	if (init)
-		error = init(inode);
-	if (!error) {
-		d_instantiate(dentry, inode);
-		if (S_ISDIR(mode))
-			dget(dentry);  /* pin only directory dentry in core */
+	inode->i_blocks = 0;
+	inode->i_mapping->a_ops = &sysfs_aops;
+	inode->i_mapping->backing_dev_info = &sysfs_backing_dev_info;
+	inode->i_op = &sysfs_inode_operations;
+	inode->i_ino = sd->s_ino;
+	lockdep_set_class(&inode->i_mutex, &sysfs_inode_imutex_key);
+
+	if (sd->s_iattr) {
+		/* sysfs_dirent has non-default attributes
+		 * get them for the new inode from persistent copy
+		 * in sysfs_dirent
+		 */
+		set_inode_attr(inode, sd->s_iattr);
 	} else
-		iput(inode);
- Done:
-	return error;
+		set_default_inode_attr(inode, sd->s_mode);
 }
 
-/*
- * Get the name for corresponding element represented by the given sysfs_dirent
+/**
+ *	sysfs_get_inode - get inode for sysfs_dirent
+ *	@sd: sysfs_dirent to allocate inode for
+ *
+ *	Get inode for @sd.  If such inode doesn't exist, a new inode
+ *	is allocated and basics are initialized.  New inode is
+ *	returned locked.
+ *
+ *	LOCKING:
+ *	Kernel thread context (may sleep).
+ *
+ *	RETURNS:
+ *	Pointer to allocated inode on success, NULL on failure.
  */
-const unsigned char * sysfs_get_name(struct sysfs_dirent *sd)
+struct inode * sysfs_get_inode(struct sysfs_dirent *sd)
 {
-	struct attribute * attr;
-	struct bin_attribute * bin_attr;
-	struct sysfs_symlink  * sl;
-
-	BUG_ON(!sd || !sd->s_element);
-
-	switch (sd->s_type) {
-		case SYSFS_DIR:
-			/* Always have a dentry so use that */
-			return sd->s_dentry->d_name.name;
-
-		case SYSFS_KOBJ_ATTR:
-			attr = sd->s_element;
-			return attr->name;
-
-		case SYSFS_KOBJ_BIN_ATTR:
-			bin_attr = sd->s_element;
-			return bin_attr->attr.name;
+	struct inode *inode;
 
-		case SYSFS_KOBJ_LINK:
-			sl = sd->s_element;
-			return sl->link_name;
-	}
-	return NULL;
-}
+	inode = iget_locked(sysfs_sb, sd->s_ino);
+	if (inode && (inode->i_state & I_NEW))
+		sysfs_init_inode(sd, inode);
 
-static inline void orphan_all_buffers(struct inode *node)
-{
-	struct sysfs_buffer_collection *set;
-	struct sysfs_buffer *buf;
-
-	mutex_lock_nested(&node->i_mutex, I_MUTEX_CHILD);
-	set = node->i_private;
-	if (set) {
-		list_for_each_entry(buf, &set->associates, associates) {
-			down(&buf->sem);
-			buf->orphaned = 1;
-			up(&buf->sem);
-		}
-	}
-	mutex_unlock(&node->i_mutex);
+	return inode;
 }
 
-
-/*
- * Unhashes the dentry corresponding to given sysfs_dirent
- * Called with parent inode's i_mutex held.
+/**
+ *	sysfs_instantiate - instantiate dentry
+ *	@dentry: dentry to be instantiated
+ *	@inode: inode associated with @sd
+ *
+ *	Unlock @inode if locked and instantiate @dentry with @inode.
+ *
+ *	LOCKING:
+ *	None.
  */
-void sysfs_drop_dentry(struct sysfs_dirent * sd, struct dentry * parent)
+void sysfs_instantiate(struct dentry *dentry, struct inode *inode)
 {
-	struct dentry *dentry = NULL;
-	struct inode *inode;
+	BUG_ON(!dentry || dentry->d_inode);
 
-	/* We're not holding a reference to ->s_dentry dentry but the
-	 * field will stay valid as long as sysfs_lock is held.
-	 */
-	spin_lock(&sysfs_lock);
-	spin_lock(&dcache_lock);
-
-	/* dget dentry if it's still alive */
-	if (sd->s_dentry && sd->s_dentry->d_inode)
-		dentry = dget_locked(sd->s_dentry);
-
-	spin_unlock(&dcache_lock);
-	spin_unlock(&sysfs_lock);
-
-	/* drop dentry */
-	if (dentry) {
-		spin_lock(&dcache_lock);
-		spin_lock(&dentry->d_lock);
-		if (!d_unhashed(dentry) && dentry->d_inode) {
-			inode = dentry->d_inode;
-			spin_lock(&inode->i_lock);
-			__iget(inode);
-			spin_unlock(&inode->i_lock);
-			dget_locked(dentry);
-			__d_drop(dentry);
-			spin_unlock(&dentry->d_lock);
-			spin_unlock(&dcache_lock);
-			simple_unlink(parent->d_inode, dentry);
-			orphan_all_buffers(inode);
-			iput(inode);
-		} else {
-			spin_unlock(&dentry->d_lock);
-			spin_unlock(&dcache_lock);
-		}
+	if (inode->i_state & I_NEW)
+		unlock_new_inode(inode);
 
-		dput(dentry);
-	}
+	d_instantiate(dentry, inode);
 }
 
-int sysfs_hash_and_remove(struct dentry * dir, const char * name)
+int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name)
 {
-	struct sysfs_dirent * sd;
-	struct sysfs_dirent * parent_sd;
-	int found = 0;
+	struct sysfs_addrm_cxt acxt;
+	struct sysfs_dirent **pos, *sd;
 
-	if (!dir)
+	if (!dir_sd)
 		return -ENOENT;
 
-	if (dir->d_inode == NULL)
-		/* no inode means this hasn't been made visible yet */
-		return -ENOENT;
+	sysfs_addrm_start(&acxt, dir_sd);
+
+	for (pos = &dir_sd->s_children; *pos; pos = &(*pos)->s_sibling) {
+		sd = *pos;
 
-	parent_sd = dir->d_fsdata;
-	mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_PARENT);
-	list_for_each_entry(sd, &parent_sd->s_children, s_sibling) {
-		if (!sd->s_element)
+		if (!sysfs_type(sd))
 			continue;
-		if (!strcmp(sysfs_get_name(sd), name)) {
-			list_del_init(&sd->s_sibling);
-			sysfs_drop_dentry(sd, dir);
-			sysfs_put(sd);
-			found = 1;
+		if (!strcmp(sd->s_name, name)) {
+			*pos = sd->s_sibling;
+			sd->s_sibling = NULL;
+			sysfs_remove_one(&acxt, sd);
 			break;
 		}
 	}
-	mutex_unlock(&dir->d_inode->i_mutex);
 
-	return found ? 0 : -ENOENT;
+	if (sysfs_addrm_finish(&acxt))
+		return 0;
+	return -ENOENT;
 }
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 00ab912..402cc35 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -19,28 +19,18 @@ struct vfsmount *sysfs_mount;
 struct super_block * sysfs_sb = NULL;
 struct kmem_cache *sysfs_dir_cachep;
 
-static void sysfs_clear_inode(struct inode *inode);
-
 static const struct super_operations sysfs_ops = {
 	.statfs		= simple_statfs,
 	.drop_inode	= sysfs_delete_inode,
-	.clear_inode	= sysfs_clear_inode,
 };
 
-static struct sysfs_dirent sysfs_root = {
-	.s_sibling	= LIST_HEAD_INIT(sysfs_root.s_sibling),
-	.s_children	= LIST_HEAD_INIT(sysfs_root.s_children),
-	.s_element	= NULL,
-	.s_type		= SYSFS_ROOT,
-	.s_iattr	= NULL,
+struct sysfs_dirent sysfs_root = {
+	.s_count	= ATOMIC_INIT(1),
+	.s_flags	= SYSFS_ROOT,
+	.s_mode		= S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
 	.s_ino		= 1,
 };
 
-static void sysfs_clear_inode(struct inode *inode)
-{
-	kfree(inode->i_private);
-}
-
 static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
 {
 	struct inode *inode;
@@ -53,24 +43,26 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
 	sb->s_time_gran = 1;
 	sysfs_sb = sb;
 
-	inode = sysfs_new_inode(S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO,
-				 &sysfs_root);
-	if (inode) {
-		inode->i_op = &sysfs_dir_inode_operations;
-		inode->i_fop = &sysfs_dir_operations;
-		/* directory inodes start off with i_nlink == 2 (for "." entry) */
-		inc_nlink(inode);
-	} else {
+	inode = new_inode(sysfs_sb);
+	if (!inode) {
 		pr_debug("sysfs: could not get root inode\n");
 		return -ENOMEM;
 	}
 
+	sysfs_init_inode(&sysfs_root, inode);
+
+	inode->i_op = &sysfs_dir_inode_operations;
+	inode->i_fop = &sysfs_dir_operations;
+	/* directory inodes start off with i_nlink == 2 (for "." entry) */
+	inc_nlink(inode);
+
 	root = d_alloc_root(inode);
 	if (!root) {
 		pr_debug("%s: could not get root dentry!\n",__FUNCTION__);
 		iput(inode);
 		return -ENOMEM;
 	}
+	sysfs_root.s_dentry = root;
 	root->d_fsdata = &sysfs_root;
 	sb->s_root = root;
 	return 0;
diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c
index 7b9c5bf..2f86e04 100644
--- a/fs/sysfs/symlink.c
+++ b/fs/sysfs/symlink.c
@@ -11,71 +11,39 @@
 
 #include "sysfs.h"
 
-static int object_depth(struct kobject * kobj)
+static int object_depth(struct sysfs_dirent *sd)
 {
-	struct kobject * p = kobj;
 	int depth = 0;
-	do { depth++; } while ((p = p->parent));
+
+	for (; sd->s_parent; sd = sd->s_parent)
+		depth++;
+
 	return depth;
 }
 
-static int object_path_length(struct kobject * kobj)
+static int object_path_length(struct sysfs_dirent * sd)
 {
-	struct kobject * p = kobj;
 	int length = 1;
-	do {
-		length += strlen(kobject_name(p)) + 1;
-		p = p->parent;
-	} while (p);
+
+	for (; sd->s_parent; sd = sd->s_parent)
+		length += strlen(sd->s_name) + 1;
+
 	return length;
 }
 
-static void fill_object_path(struct kobject * kobj, char * buffer, int length)
+static void fill_object_path(struct sysfs_dirent *sd, char *buffer, int length)
 {
-	struct kobject * p;
-
 	--length;
-	for (p = kobj; p; p = p->parent) {
-		int cur = strlen(kobject_name(p));
+	for (; sd->s_parent; sd = sd->s_parent) {
+		int cur = strlen(sd->s_name);
 
 		/* back up enough to print this bus id with '/' */
 		length -= cur;
-		strncpy(buffer + length,kobject_name(p),cur);
+		strncpy(buffer + length, sd->s_name, cur);
 		*(buffer + --length) = '/';
 	}
 }
 
-static int sysfs_add_link(struct dentry * parent, const char * name, struct kobject * target)
-{
-	struct sysfs_dirent * parent_sd = parent->d_fsdata;
-	struct sysfs_symlink * sl;
-	int error = 0;
-
-	error = -ENOMEM;
-	sl = kmalloc(sizeof(*sl), GFP_KERNEL);
-	if (!sl)
-		goto exit1;
-
-	sl->link_name = kmalloc(strlen(name) + 1, GFP_KERNEL);
-	if (!sl->link_name)
-		goto exit2;
-
-	strcpy(sl->link_name, name);
-	sl->target_kobj = kobject_get(target);
-
-	error = sysfs_make_dirent(parent_sd, NULL, sl, S_IFLNK|S_IRWXUGO,
-				SYSFS_KOBJ_LINK);
-	if (!error)
-		return 0;
-
-	kobject_put(target);
-	kfree(sl->link_name);
-exit2:
-	kfree(sl);
-exit1:
-	return error;
-}
-
 /**
  *	sysfs_create_link - create symlink between two objects.
  *	@kobj:	object whose directory we're creating the link in.
@@ -84,24 +52,57 @@ exit1:
  */
 int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name)
 {
-	struct dentry *dentry = NULL;
-	int error = -EEXIST;
+	struct sysfs_dirent *parent_sd = NULL;
+	struct sysfs_dirent *target_sd = NULL;
+	struct sysfs_dirent *sd = NULL;
+	struct sysfs_addrm_cxt acxt;
+	int error;
 
 	BUG_ON(!name);
 
 	if (!kobj) {
 		if (sysfs_mount && sysfs_mount->mnt_sb)
-			dentry = sysfs_mount->mnt_sb->s_root;
+			parent_sd = sysfs_mount->mnt_sb->s_root->d_fsdata;
 	} else
-		dentry = kobj->dentry;
+		parent_sd = kobj->sd;
+
+	error = -EFAULT;
+	if (!parent_sd)
+		goto out_put;
+
+	/* target->sd can go away beneath us but is protected with
+	 * sysfs_assoc_lock.  Fetch target_sd from it.
+	 */
+	spin_lock(&sysfs_assoc_lock);
+	if (target->sd)
+		target_sd = sysfs_get(target->sd);
+	spin_unlock(&sysfs_assoc_lock);
+
+	error = -ENOENT;
+	if (!target_sd)
+		goto out_put;
+
+	error = -ENOMEM;
+	sd = sysfs_new_dirent(name, S_IFLNK|S_IRWXUGO, SYSFS_KOBJ_LINK);
+	if (!sd)
+		goto out_put;
+	sd->s_elem.symlink.target_sd = target_sd;
 
-	if (!dentry)
-		return -EFAULT;
+	sysfs_addrm_start(&acxt, parent_sd);
 
-	mutex_lock(&dentry->d_inode->i_mutex);
-	if (!sysfs_dirent_exist(dentry->d_fsdata, name))
-		error = sysfs_add_link(dentry, name, target);
-	mutex_unlock(&dentry->d_inode->i_mutex);
+	if (!sysfs_find_dirent(parent_sd, name)) {
+		sysfs_add_one(&acxt, sd);
+		sysfs_link_sibling(sd);
+	}
+
+	if (sysfs_addrm_finish(&acxt))
+		return 0;
+
+	error = -EEXIST;
+	/* fall through */
+ out_put:
+	sysfs_put(target_sd);
+	sysfs_put(sd);
 	return error;
 }
 
@@ -114,17 +115,17 @@ int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char
 
 void sysfs_remove_link(struct kobject * kobj, const char * name)
 {
-	sysfs_hash_and_remove(kobj->dentry,name);
+	sysfs_hash_and_remove(kobj->sd, name);
 }
 
-static int sysfs_get_target_path(struct kobject * kobj, struct kobject * target,
-				 char *path)
+static int sysfs_get_target_path(struct sysfs_dirent * parent_sd,
+				 struct sysfs_dirent * target_sd, char *path)
 {
 	char * s;
 	int depth, size;
 
-	depth = object_depth(kobj);
-	size = object_path_length(target) + depth * 3 - 1;
+	depth = object_depth(parent_sd);
+	size = object_path_length(target_sd) + depth * 3 - 1;
 	if (size > PATH_MAX)
 		return -ENAMETOOLONG;
 
@@ -133,7 +134,7 @@ static int sysfs_get_target_path(struct kobject * kobj, struct kobject * target,
 	for (s = path; depth--; s += 3)
 		strcpy(s,"../");
 
-	fill_object_path(target, path, size);
+	fill_object_path(target_sd, path, size);
 	pr_debug("%s: path = '%s'\n", __FUNCTION__, path);
 
 	return 0;
@@ -141,27 +142,16 @@ static int sysfs_get_target_path(struct kobject * kobj, struct kobject * target,
 
 static int sysfs_getlink(struct dentry *dentry, char * path)
 {
-	struct kobject *kobj, *target_kobj;
-	int error = 0;
+	struct sysfs_dirent *sd = dentry->d_fsdata;
+	struct sysfs_dirent *parent_sd = sd->s_parent;
+	struct sysfs_dirent *target_sd = sd->s_elem.symlink.target_sd;
+	int error;
 
-	kobj = sysfs_get_kobject(dentry->d_parent);
-	if (!kobj)
-		return -EINVAL;
+	mutex_lock(&sysfs_mutex);
+	error = sysfs_get_target_path(parent_sd, target_sd, path);
+	mutex_unlock(&sysfs_mutex);
 
-	target_kobj = sysfs_get_kobject(dentry);
-	if (!target_kobj) {
-		kobject_put(kobj);
-		return -EINVAL;
-	}
-
-	down_read(&sysfs_rename_sem);
-	error = sysfs_get_target_path(kobj, target_kobj, path);
-	up_read(&sysfs_rename_sem);
-	
-	kobject_put(kobj);
-	kobject_put(target_kobj);
 	return error;
-
 }
 
 static void *sysfs_follow_link(struct dentry *dentry, struct nameidata *nd)
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index 502c949..6a37f23 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -1,9 +1,40 @@
+struct sysfs_elem_dir {
+	struct kobject		* kobj;
+};
+
+struct sysfs_elem_symlink {
+	struct sysfs_dirent	* target_sd;
+};
+
+struct sysfs_elem_attr {
+	struct attribute	* attr;
+};
+
+struct sysfs_elem_bin_attr {
+	struct bin_attribute	* bin_attr;
+};
+
+/*
+ * As long as s_count reference is held, the sysfs_dirent itself is
+ * accessible.  Dereferencing s_elem or any other outer entity
+ * requires s_active reference.
+ */
 struct sysfs_dirent {
 	atomic_t		s_count;
-	struct list_head	s_sibling;
-	struct list_head	s_children;
-	void 			* s_element;
-	int			s_type;
+	atomic_t		s_active;
+	struct sysfs_dirent	* s_parent;
+	struct sysfs_dirent	* s_sibling;
+	struct sysfs_dirent	* s_children;
+	const char		* s_name;
+
+	union {
+		struct sysfs_elem_dir		dir;
+		struct sysfs_elem_symlink	symlink;
+		struct sysfs_elem_attr		attr;
+		struct sysfs_elem_bin_attr	bin_attr;
+	}			s_elem;
+
+	unsigned int		s_flags;
 	umode_t			s_mode;
 	ino_t			s_ino;
 	struct dentry		* s_dentry;
@@ -11,30 +42,60 @@ struct sysfs_dirent {
 	atomic_t		s_event;
 };
 
+#define SD_DEACTIVATED_BIAS	INT_MIN
+
+struct sysfs_addrm_cxt {
+	struct sysfs_dirent	*parent_sd;
+	struct inode		*parent_inode;
+	struct sysfs_dirent	*removed;
+	int			cnt;
+};
+
 extern struct vfsmount * sysfs_mount;
+extern struct sysfs_dirent sysfs_root;
 extern struct kmem_cache *sysfs_dir_cachep;
 
-extern void sysfs_delete_inode(struct inode *inode);
-extern struct inode * sysfs_new_inode(mode_t mode, struct sysfs_dirent *);
-extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *));
+extern struct dentry *sysfs_get_dentry(struct sysfs_dirent *sd);
+extern void sysfs_link_sibling(struct sysfs_dirent *sd);
+extern void sysfs_unlink_sibling(struct sysfs_dirent *sd);
+extern struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd);
+extern void sysfs_put_active(struct sysfs_dirent *sd);
+extern struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd);
+extern void sysfs_put_active_two(struct sysfs_dirent *sd);
+extern void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt,
+			      struct sysfs_dirent *parent_sd);
+extern void sysfs_add_one(struct sysfs_addrm_cxt *acxt,
+			  struct sysfs_dirent *sd);
+extern void sysfs_remove_one(struct sysfs_addrm_cxt *acxt,
+			     struct sysfs_dirent *sd);
+extern int sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt);
 
-extern int sysfs_dirent_exist(struct sysfs_dirent *, const unsigned char *);
-extern int sysfs_make_dirent(struct sysfs_dirent *, struct dentry *, void *,
-				umode_t, int);
-
-extern int sysfs_add_file(struct dentry *, const struct attribute *, int);
-extern int sysfs_hash_and_remove(struct dentry * dir, const char * name);
+extern void sysfs_delete_inode(struct inode *inode);
+extern void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode);
+extern struct inode * sysfs_get_inode(struct sysfs_dirent *sd);
+extern void sysfs_instantiate(struct dentry *dentry, struct inode *inode);
+
+extern void release_sysfs_dirent(struct sysfs_dirent * sd);
+extern struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd,
+					      const unsigned char *name);
+extern struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
+					     const unsigned char *name);
+extern struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode,
+					     int type);
+
+extern int sysfs_add_file(struct sysfs_dirent *dir_sd,
+			  const struct attribute *attr, int type);
+extern int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const char *name);
 extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name);
 
-extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **);
-extern void sysfs_remove_subdir(struct dentry *);
+extern int sysfs_create_subdir(struct kobject *kobj, const char *name,
+			       struct sysfs_dirent **p_sd);
+extern void sysfs_remove_subdir(struct sysfs_dirent *sd);
 
-extern const unsigned char * sysfs_get_name(struct sysfs_dirent *sd);
-extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent);
 extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
 
-extern spinlock_t sysfs_lock;
-extern struct rw_semaphore sysfs_rename_sem;
+extern spinlock_t sysfs_assoc_lock;
+extern struct mutex sysfs_mutex;
 extern struct super_block * sysfs_sb;
 extern const struct file_operations sysfs_dir_operations;
 extern const struct file_operations sysfs_file_operations;
@@ -42,73 +103,9 @@ extern const struct file_operations bin_fops;
 extern const struct inode_operations sysfs_dir_inode_operations;
 extern const struct inode_operations sysfs_symlink_inode_operations;
 
-struct sysfs_symlink {
-	char * link_name;
-	struct kobject * target_kobj;
-};
-
-struct sysfs_buffer {
-	struct list_head		associates;
-	size_t				count;
-	loff_t				pos;
-	char				* page;
-	struct sysfs_ops		* ops;
-	struct semaphore		sem;
-	int				orphaned;
-	int				needs_read_fill;
-	int				event;
-};
-
-struct sysfs_buffer_collection {
-	struct list_head	associates;
-};
-
-static inline struct kobject * to_kobj(struct dentry * dentry)
-{
-	struct sysfs_dirent * sd = dentry->d_fsdata;
-	return ((struct kobject *) sd->s_element);
-}
-
-static inline struct attribute * to_attr(struct dentry * dentry)
+static inline unsigned int sysfs_type(struct sysfs_dirent *sd)
 {
-	struct sysfs_dirent * sd = dentry->d_fsdata;
-	return ((struct attribute *) sd->s_element);
-}
-
-static inline struct bin_attribute * to_bin_attr(struct dentry * dentry)
-{
-	struct sysfs_dirent * sd = dentry->d_fsdata;
-	return ((struct bin_attribute *) sd->s_element);
-}
-
-static inline struct kobject *sysfs_get_kobject(struct dentry *dentry)
-{
-	struct kobject * kobj = NULL;
-
-	spin_lock(&dcache_lock);
-	if (!d_unhashed(dentry)) {
-		struct sysfs_dirent * sd = dentry->d_fsdata;
-		if (sd->s_type & SYSFS_KOBJ_LINK) {
-			struct sysfs_symlink * sl = sd->s_element;
-			kobj = kobject_get(sl->target_kobj);
-		} else
-			kobj = kobject_get(sd->s_element);
-	}
-	spin_unlock(&dcache_lock);
-
-	return kobj;
-}
-
-static inline void release_sysfs_dirent(struct sysfs_dirent * sd)
-{
-	if (sd->s_type & SYSFS_KOBJ_LINK) {
-		struct sysfs_symlink * sl = sd->s_element;
-		kfree(sl->link_name);
-		kobject_put(sl->target_kobj);
-		kfree(sl);
-	}
-	kfree(sd->s_iattr);
-	kmem_cache_free(sysfs_dir_cachep, sd);
+	return sd->s_flags & SYSFS_TYPE_MASK;
 }
 
 static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
@@ -122,7 +119,7 @@ static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd)
 
 static inline void sysfs_put(struct sysfs_dirent * sd)
 {
-	if (atomic_dec_and_test(&sd->s_count))
+	if (sd && atomic_dec_and_test(&sd->s_count))
 		release_sysfs_dirent(sd);
 }
 
diff --git a/fs/sysv/file.c b/fs/sysv/file.c
index 0732ddb..589be21 100644
--- a/fs/sysv/file.c
+++ b/fs/sysv/file.c
@@ -27,7 +27,7 @@ const struct file_operations sysv_file_operations = {
 	.aio_write	= generic_file_aio_write,
 	.mmap		= generic_file_mmap,
 	.fsync		= sysv_sync_file,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 };
 
 const struct inode_operations sysv_file_inode_operations = {
diff --git a/fs/udf/crc.c b/fs/udf/crc.c
index 1b82a4a..ef2bfaa 100644
--- a/fs/udf/crc.c
+++ b/fs/udf/crc.c
@@ -106,8 +106,8 @@ int main(void)
 {
 	unsigned short x;
 
-	x = udf_crc16(bytes, sizeof bytes);
-	printf("udf_crc16: calculated = %4.4x, correct = %4.4x\n", x, 0x3299U);
+	x = udf_crc(bytes, sizeof bytes);
+	printf("udf_crc: calculated = %4.4x, correct = %4.4x\n", x, 0x3299U);
 
 	return 0;
 }
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 51b5764..df070be 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -261,7 +261,7 @@ const struct file_operations udf_file_operations = {
 	.aio_write		= udf_file_aio_write,
 	.release		= udf_release_file,
 	.fsync			= udf_fsync_file,
-	.sendfile		= generic_file_sendfile,
+	.splice_read		= generic_file_splice_read,
 };
 
 const struct inode_operations udf_file_inode_operations = {
diff --git a/fs/udf/ialloc.c b/fs/udf/ialloc.c
index 8206983..10f3188 100644
--- a/fs/udf/ialloc.c
+++ b/fs/udf/ialloc.c
@@ -50,7 +50,7 @@ void udf_free_inode(struct inode * inode)
 		else
 			UDF_SB_LVIDIU(sb)->numFiles =
 				cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) - 1);
-		
+
 		mark_buffer_dirty(sbi->s_lvidbh);
 	}
 	mutex_unlock(&sbi->s_alloc_mutex);
@@ -136,6 +136,13 @@ struct inode * udf_new_inode (struct inode *dir, int mode, int * err)
 		UDF_I_EFE(inode) = 0;
 		UDF_I_DATA(inode) = kzalloc(inode->i_sb->s_blocksize - sizeof(struct fileEntry), GFP_KERNEL);
 	}
+	if (!UDF_I_DATA(inode))
+	{
+		iput(inode);
+		*err = -ENOMEM;
+		mutex_unlock(&sbi->s_alloc_mutex);
+		return NULL;
+	}
 	if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
 		UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB;
 	else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index bf7de0b..5b82e48 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -49,6 +49,7 @@ MODULE_LICENSE("GPL");
 static mode_t udf_convert_permissions(struct fileEntry *);
 static int udf_update_inode(struct inode *, int);
 static void udf_fill_inode(struct inode *, struct buffer_head *);
+static int udf_alloc_i_data(struct inode *inode, size_t size);
 static struct buffer_head *inode_getblk(struct inode *, sector_t, int *,
 	long *, int *);
 static int8_t udf_insert_aext(struct inode *, struct extent_position,
@@ -734,7 +735,7 @@ static void udf_split_extents(struct inode *inode, int *c, int offset, int newbl
 			(*c) ++;
 			(*endnum) ++;
 		}
-		
+
 		laarr[curr].extLocation.logicalBlockNum = newblocknum;
 		if (etype == (EXT_NOT_RECORDED_NOT_ALLOCATED >> 30))
 			laarr[curr].extLocation.partitionReferenceNum =
@@ -836,7 +837,7 @@ static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
 				{
 					numalloc -= elen;
 					if (*endnum > (i+1))
-						memmove(&laarr[i], &laarr[i+1], 
+						memmove(&laarr[i], &laarr[i+1],
 							sizeof(long_ad) * (*endnum - (i+1)));
 					i --;
 					(*endnum) --;
@@ -1024,7 +1025,7 @@ void udf_truncate(struct inode * inode)
 	{
 		block_truncate_page(inode->i_mapping, inode->i_size, udf_get_block);
 		udf_truncate_extents(inode);
-	}	
+	}
 
 	inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
 	if (IS_SYNC(inode))
@@ -1087,10 +1088,10 @@ __udf_read_inode(struct inode *inode)
 			{
 				kernel_lb_addr loc;
 				ie = (struct indirectEntry *)ibh->b_data;
-	
+
 				loc = lelb_to_cpu(ie->indirectICB.extLocation);
-	
-				if (ie->indirectICB.extLength && 
+
+				if (ie->indirectICB.extLength &&
 					(nbh = udf_read_ptagged(inode->i_sb, loc, 0, &ident)))
 				{
 					if (ident == TAG_IDENT_FE ||
@@ -1156,14 +1157,22 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
 	{
 		UDF_I_EFE(inode) = 1;
 		UDF_I_USE(inode) = 0;
-		UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry), GFP_KERNEL);
+		if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)))
+		{
+			make_bad_inode(inode);
+			return;
+		}
 		memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct extendedFileEntry), inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry));
 	}
 	else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_FE)
 	{
 		UDF_I_EFE(inode) = 0;
 		UDF_I_USE(inode) = 0;
-		UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct fileEntry), GFP_KERNEL);
+		if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - sizeof(struct fileEntry)))
+		{
+			make_bad_inode(inode);
+			return;
+		}
 		memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct fileEntry), inode->i_sb->s_blocksize - sizeof(struct fileEntry));
 	}
 	else if (le16_to_cpu(fe->descTag.tagIdent) == TAG_IDENT_USE)
@@ -1173,7 +1182,11 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
 		UDF_I_LENALLOC(inode) =
 			le32_to_cpu(
 				((struct unallocSpaceEntry *)bh->b_data)->lengthAllocDescs);
-		UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry), GFP_KERNEL);
+		if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry)))
+		{
+			make_bad_inode(inode);
+			return;
+		}
 		memcpy(UDF_I_DATA(inode), bh->b_data + sizeof(struct unallocSpaceEntry), inode->i_sb->s_blocksize - sizeof(struct unallocSpaceEntry));
 		return;
 	}
@@ -1191,7 +1204,7 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
 	inode->i_nlink = le16_to_cpu(fe->fileLinkCount);
 	if (!inode->i_nlink)
 		inode->i_nlink = 1;
-	
+
 	inode->i_size = le64_to_cpu(fe->informationLength);
 	UDF_I_LENEXTENTS(inode) = inode->i_size;
 
@@ -1243,7 +1256,7 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
 	}
 	else
 	{
-		inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) << 
+		inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
 			(inode->i_sb->s_blocksize_bits - 9);
 
 		if ( udf_stamp_to_time(&convtime, &convtime_usec,
@@ -1374,6 +1387,20 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
 	}
 }
 
+static int udf_alloc_i_data(struct inode *inode, size_t size)
+{
+	UDF_I_DATA(inode) = kmalloc(size, GFP_KERNEL);
+
+	if (!UDF_I_DATA(inode))
+	{
+		printk(KERN_ERR "udf:udf_alloc_i_data (ino %ld) no free memory\n",
+		       inode->i_ino);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
 static mode_t
 udf_convert_permissions(struct fileEntry *fe)
 {
@@ -2072,7 +2099,7 @@ int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
 			mark_buffer_dirty_inode(oepos.bh, inode);
 		}
 	}
-	
+
 	brelse(epos.bh);
 	brelse(oepos.bh);
 	return (elen >> 30);
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 6658afb..d6a504f 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1356,7 +1356,7 @@ udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset)
 			case UDF_VIRTUAL_MAP15:
 			case UDF_VIRTUAL_MAP20:
 			{
-				kernel_lb_addr ino;
+				kernel_lb_addr uninitialized_var(ino);
 
 				if (!UDF_SB_LASTBLOCK(sb))
 				{
diff --git a/fs/ufs/file.c b/fs/ufs/file.c
index 1e09632..6705d74 100644
--- a/fs/ufs/file.c
+++ b/fs/ufs/file.c
@@ -60,5 +60,5 @@ const struct file_operations ufs_file_operations = {
 	.mmap		= generic_file_mmap,
 	.open           = generic_file_open,
 	.fsync		= ufs_sync_file,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 };
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 22ff6ed..2b30116 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -87,6 +87,7 @@
 #include <linux/smp_lock.h>
 #include <linux/buffer_head.h>
 #include <linux/vfs.h>
+#include <linux/log2.h>
 
 #include "swab.h"
 #include "util.h"
@@ -854,7 +855,7 @@ magic_found:
 	uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
 	uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
 
-	if (uspi->s_fsize & (uspi->s_fsize - 1)) {
+	if (!is_power_of_2(uspi->s_fsize)) {
 		printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
 			uspi->s_fsize);
 			goto failed;
@@ -869,7 +870,7 @@ magic_found:
 			uspi->s_fsize);
 		goto failed;
 	}
-	if (uspi->s_bsize & (uspi->s_bsize - 1)) {
+	if (!is_power_of_2(uspi->s_bsize)) {
 		printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
 			uspi->s_bsize);
 		goto failed;
diff --git a/fs/utimes.c b/fs/utimes.c
index 480f7c8..682eb63 100644
--- a/fs/utimes.c
+++ b/fs/utimes.c
@@ -106,9 +106,16 @@ long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags
                 if (IS_IMMUTABLE(inode))
                         goto dput_and_out;
 
-		if (current->fsuid != inode->i_uid &&
-		    (error = vfs_permission(&nd, MAY_WRITE)) != 0)
-			goto dput_and_out;
+		if (!is_owner_or_cap(inode)) {
+			if (f) {
+				if (!(f->f_mode & FMODE_WRITE))
+					goto dput_and_out;
+			} else {
+				error = vfs_permission(&nd, MAY_WRITE);
+				if (error)
+					goto dput_and_out;
+			}
+		}
 	}
 	mutex_lock(&inode->i_mutex);
 	error = notify_change(dentry, &newattrs);
diff --git a/fs/xattr.c b/fs/xattr.c
index 4523aca..a44fd92 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -60,8 +60,7 @@ xattr_permission(struct inode *inode, const char *name, int mask)
 		if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
 			return -EPERM;
 		if (S_ISDIR(inode->i_mode) && (inode->i_mode & S_ISVTX) &&
-		    (mask & MAY_WRITE) && (current->fsuid != inode->i_uid) &&
-		    !capable(CAP_FOWNER))
+		    (mask & MAY_WRITE) && !is_owner_or_cap(inode))
 			return -EPERM;
 	}
 
diff --git a/fs/xfs/Makefile-linux-2.6 b/fs/xfs/Makefile-linux-2.6
index b49989b..e7a9a83 100644
--- a/fs/xfs/Makefile-linux-2.6
+++ b/fs/xfs/Makefile-linux-2.6
@@ -64,6 +64,7 @@ xfs-y				+= xfs_alloc.o \
 				   xfs_dir2_sf.o \
 				   xfs_error.o \
 				   xfs_extfree_item.o \
+				   xfs_filestream.o \
 				   xfs_fsops.o \
 				   xfs_ialloc.o \
 				   xfs_ialloc_btree.o \
@@ -77,6 +78,7 @@ xfs-y				+= xfs_alloc.o \
 				   xfs_log.o \
 				   xfs_log_recover.o \
 				   xfs_mount.o \
+				   xfs_mru_cache.o \
 				   xfs_rename.o \
 				   xfs_trans.o \
 				   xfs_trans_ail.o \
diff --git a/fs/xfs/linux-2.6/kmem.h b/fs/xfs/linux-2.6/kmem.h
index 9ebabdf..4b6470c 100644
--- a/fs/xfs/linux-2.6/kmem.h
+++ b/fs/xfs/linux-2.6/kmem.h
@@ -100,25 +100,6 @@ kmem_zone_destroy(kmem_zone_t *zone)
 extern void *kmem_zone_alloc(kmem_zone_t *, unsigned int __nocast);
 extern void *kmem_zone_zalloc(kmem_zone_t *, unsigned int __nocast);
 
-/*
- * Low memory cache shrinkers
- */
-
-typedef struct shrinker *kmem_shaker_t;
-typedef int (*kmem_shake_func_t)(int, gfp_t);
-
-static inline kmem_shaker_t
-kmem_shake_register(kmem_shake_func_t sfunc)
-{
-	return set_shrinker(DEFAULT_SEEKS, sfunc);
-}
-
-static inline void
-kmem_shake_deregister(kmem_shaker_t shrinker)
-{
-	remove_shrinker(shrinker);
-}
-
 static inline int
 kmem_shake_allow(gfp_t gfp_mask)
 {
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index 7361861..fd4105d 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -108,14 +108,19 @@ xfs_page_trace(
 
 /*
  * Schedule IO completion handling on a xfsdatad if this was
- * the final hold on this ioend.
+ * the final hold on this ioend. If we are asked to wait,
+ * flush the workqueue.
  */
 STATIC void
 xfs_finish_ioend(
-	xfs_ioend_t		*ioend)
+	xfs_ioend_t	*ioend,
+	int		wait)
 {
-	if (atomic_dec_and_test(&ioend->io_remaining))
+	if (atomic_dec_and_test(&ioend->io_remaining)) {
 		queue_work(xfsdatad_workqueue, &ioend->io_work);
+		if (wait)
+			flush_workqueue(xfsdatad_workqueue);
+	}
 }
 
 /*
@@ -156,6 +161,8 @@ xfs_setfilesize(
 	xfs_fsize_t		bsize;
 
 	ip = xfs_vtoi(ioend->io_vnode);
+	if (!ip)
+		return;
 
 	ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG);
 	ASSERT(ioend->io_type != IOMAP_READ);
@@ -334,7 +341,7 @@ xfs_end_bio(
 	bio->bi_end_io = NULL;
 	bio_put(bio);
 
-	xfs_finish_ioend(ioend);
+	xfs_finish_ioend(ioend, 0);
 	return 0;
 }
 
@@ -470,7 +477,7 @@ xfs_submit_ioend(
 		}
 		if (bio)
 			xfs_submit_ioend_bio(ioend, bio);
-		xfs_finish_ioend(ioend);
+		xfs_finish_ioend(ioend, 0);
 	} while ((ioend = next) != NULL);
 }
 
@@ -1003,6 +1010,8 @@ xfs_page_state_convert(
 		if (buffer_unwritten(bh) || buffer_delay(bh) ||
 		    ((buffer_uptodate(bh) || PageUptodate(page)) &&
 		     !buffer_mapped(bh) && (unmapped || startio))) {
+			int new_ioend = 0;
+
 			/*
 			 * Make sure we don't use a read-only iomap
 			 */
@@ -1021,6 +1030,15 @@ xfs_page_state_convert(
 			}
 
 			if (!iomap_valid) {
+				/*
+				 * if we didn't have a valid mapping then we
+				 * need to ensure that we put the new mapping
+				 * in a new ioend structure. This needs to be
+				 * done to ensure that the ioends correctly
+				 * reflect the block mappings at io completion
+				 * for unwritten extent conversion.
+				 */
+				new_ioend = 1;
 				if (type == IOMAP_NEW) {
 					size = xfs_probe_cluster(inode,
 							page, bh, head, 0);
@@ -1040,7 +1058,7 @@ xfs_page_state_convert(
 				if (startio) {
 					xfs_add_to_ioend(inode, bh, offset,
 							type, &ioend,
-							!iomap_valid);
+							new_ioend);
 				} else {
 					set_buffer_dirty(bh);
 					unlock_buffer(bh);
@@ -1416,6 +1434,13 @@ xfs_end_io_direct(
 	 * This is not necessary for synchronous direct I/O, but we do
 	 * it anyway to keep the code uniform and simpler.
 	 *
+	 * Well, if only it were that simple. Because synchronous direct I/O
+	 * requires extent conversion to occur *before* we return to userspace,
+	 * we have to wait for extent conversion to complete. Look at the
+	 * iocb that has been passed to us to determine if this is AIO or
+	 * not. If it is synchronous, tell xfs_finish_ioend() to kick the
+	 * workqueue and wait for it to complete.
+	 *
 	 * The core direct I/O code might be changed to always call the
 	 * completion handler in the future, in which case all this can
 	 * go away.
@@ -1423,9 +1448,9 @@ xfs_end_io_direct(
 	ioend->io_offset = offset;
 	ioend->io_size = size;
 	if (ioend->io_type == IOMAP_READ) {
-		xfs_finish_ioend(ioend);
+		xfs_finish_ioend(ioend, 0);
 	} else if (private && size > 0) {
-		xfs_finish_ioend(ioend);
+		xfs_finish_ioend(ioend, is_sync_kiocb(iocb));
 	} else {
 		/*
 		 * A direct I/O write ioend starts it's life in unwritten
@@ -1434,7 +1459,7 @@ xfs_end_io_direct(
 		 * handler.
 		 */
 		INIT_WORK(&ioend->io_work, xfs_end_bio_written);
-		xfs_finish_ioend(ioend);
+		xfs_finish_ioend(ioend, 0);
 	}
 
 	/*
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index fe4f66a..b0f0e58 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -35,10 +35,13 @@
 #include <linux/freezer.h>
 
 static kmem_zone_t *xfs_buf_zone;
-static kmem_shaker_t xfs_buf_shake;
 STATIC int xfsbufd(void *);
 STATIC int xfsbufd_wakeup(int, gfp_t);
 STATIC void xfs_buf_delwri_queue(xfs_buf_t *, int);
+static struct shrinker xfs_buf_shake = {
+	.shrink = xfsbufd_wakeup,
+	.seeks = DEFAULT_SEEKS,
+};
 
 static struct workqueue_struct *xfslogd_workqueue;
 struct workqueue_struct *xfsdatad_workqueue;
@@ -314,7 +317,7 @@ xfs_buf_free(
 
 	ASSERT(list_empty(&bp->b_hash_list));
 
-	if (bp->b_flags & _XBF_PAGE_CACHE) {
+	if (bp->b_flags & (_XBF_PAGE_CACHE|_XBF_PAGES)) {
 		uint		i;
 
 		if ((bp->b_flags & XBF_MAPPED) && (bp->b_page_count > 1))
@@ -323,18 +326,11 @@ xfs_buf_free(
 		for (i = 0; i < bp->b_page_count; i++) {
 			struct page	*page = bp->b_pages[i];
 
-			ASSERT(!PagePrivate(page));
+			if (bp->b_flags & _XBF_PAGE_CACHE)
+				ASSERT(!PagePrivate(page));
 			page_cache_release(page);
 		}
 		_xfs_buf_free_pages(bp);
-	} else if (bp->b_flags & _XBF_KMEM_ALLOC) {
-		 /*
-		  * XXX(hch): bp->b_count_desired might be incorrect (see
-		  * xfs_buf_associate_memory for details), but fortunately
-		  * the Linux version of kmem_free ignores the len argument..
-		  */
-		kmem_free(bp->b_addr, bp->b_count_desired);
-		_xfs_buf_free_pages(bp);
 	}
 
 	xfs_buf_deallocate(bp);
@@ -764,43 +760,44 @@ xfs_buf_get_noaddr(
 	size_t			len,
 	xfs_buftarg_t		*target)
 {
-	size_t			malloc_len = len;
+	unsigned long		page_count = PAGE_ALIGN(len) >> PAGE_SHIFT;
+	int			error, i;
 	xfs_buf_t		*bp;
-	void			*data;
-	int			error;
 
 	bp = xfs_buf_allocate(0);
 	if (unlikely(bp == NULL))
 		goto fail;
 	_xfs_buf_initialize(bp, target, 0, len, 0);
 
- try_again:
-	data = kmem_alloc(malloc_len, KM_SLEEP | KM_MAYFAIL | KM_LARGE);
-	if (unlikely(data == NULL))
+	error = _xfs_buf_get_pages(bp, page_count, 0);
+	if (error)
 		goto fail_free_buf;
 
-	/* check whether alignment matches.. */
-	if ((__psunsigned_t)data !=
-	    ((__psunsigned_t)data & ~target->bt_smask)) {
-		/* .. else double the size and try again */
-		kmem_free(data, malloc_len);
-		malloc_len <<= 1;
-		goto try_again;
+	for (i = 0; i < page_count; i++) {
+		bp->b_pages[i] = alloc_page(GFP_KERNEL);
+		if (!bp->b_pages[i])
+			goto fail_free_mem;
 	}
+	bp->b_flags |= _XBF_PAGES;
 
-	error = xfs_buf_associate_memory(bp, data, len);
-	if (error)
+	error = _xfs_buf_map_pages(bp, XBF_MAPPED);
+	if (unlikely(error)) {
+		printk(KERN_WARNING "%s: failed to map pages\n",
+				__FUNCTION__);
 		goto fail_free_mem;
-	bp->b_flags |= _XBF_KMEM_ALLOC;
+	}
 
 	xfs_buf_unlock(bp);
 
-	XB_TRACE(bp, "no_daddr", data);
+	XB_TRACE(bp, "no_daddr", len);
 	return bp;
+
  fail_free_mem:
-	kmem_free(data, malloc_len);
+	while (--i >= 0)
+		__free_page(bp->b_pages[i]);
+	_xfs_buf_free_pages(bp);
  fail_free_buf:
-	xfs_buf_free(bp);
+	xfs_buf_deallocate(bp);
  fail:
 	return NULL;
 }
@@ -1453,6 +1450,7 @@ xfs_free_buftarg(
 	int			external)
 {
 	xfs_flush_buftarg(btp, 1);
+	xfs_blkdev_issue_flush(btp);
 	if (external)
 		xfs_blkdev_put(btp->bt_bdev);
 	xfs_free_bufhash(btp);
@@ -1837,14 +1835,9 @@ xfs_buf_init(void)
 	if (!xfsdatad_workqueue)
 		goto out_destroy_xfslogd_workqueue;
 
-	xfs_buf_shake = kmem_shake_register(xfsbufd_wakeup);
-	if (!xfs_buf_shake)
-		goto out_destroy_xfsdatad_workqueue;
-
+	register_shrinker(&xfs_buf_shake);
 	return 0;
 
- out_destroy_xfsdatad_workqueue:
-	destroy_workqueue(xfsdatad_workqueue);
  out_destroy_xfslogd_workqueue:
 	destroy_workqueue(xfslogd_workqueue);
  out_free_buf_zone:
@@ -1859,7 +1852,7 @@ xfs_buf_init(void)
 void
 xfs_buf_terminate(void)
 {
-	kmem_shake_deregister(xfs_buf_shake);
+	unregister_shrinker(&xfs_buf_shake);
 	destroy_workqueue(xfsdatad_workqueue);
 	destroy_workqueue(xfslogd_workqueue);
 	kmem_zone_destroy(xfs_buf_zone);
diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h
index b6241f6..b5908a3 100644
--- a/fs/xfs/linux-2.6/xfs_buf.h
+++ b/fs/xfs/linux-2.6/xfs_buf.h
@@ -63,7 +63,7 @@ typedef enum {
 
 	/* flags used only internally */
 	_XBF_PAGE_CACHE = (1 << 17),/* backed by pagecache		   */
-	_XBF_KMEM_ALLOC = (1 << 18),/* backed by kmem_alloc()		   */
+	_XBF_PAGES = (1 << 18),	    /* backed by refcounted pages	   */
 	_XBF_RUN_QUEUES = (1 << 19),/* run block device task queue	   */
 	_XBF_DELWRI_Q = (1 << 21),   /* buffer on delwri queue		   */
 } xfs_buf_flags_t;
diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c
index cb51dc9..cbcd40c 100644
--- a/fs/xfs/linux-2.6/xfs_file.c
+++ b/fs/xfs/linux-2.6/xfs_file.c
@@ -124,30 +124,6 @@ xfs_file_aio_write_invis(
 }
 
 STATIC ssize_t
-xfs_file_sendfile(
-	struct file		*filp,
-	loff_t			*pos,
-	size_t			count,
-	read_actor_t		actor,
-	void			*target)
-{
-	return bhv_vop_sendfile(vn_from_inode(filp->f_path.dentry->d_inode),
-				filp, pos, 0, count, actor, target, NULL);
-}
-
-STATIC ssize_t
-xfs_file_sendfile_invis(
-	struct file		*filp,
-	loff_t			*pos,
-	size_t			count,
-	read_actor_t		actor,
-	void			*target)
-{
-	return bhv_vop_sendfile(vn_from_inode(filp->f_path.dentry->d_inode),
-				filp, pos, IO_INVIS, count, actor, target, NULL);
-}
-
-STATIC ssize_t
 xfs_file_splice_read(
 	struct file		*infilp,
 	loff_t			*ppos,
@@ -208,15 +184,6 @@ xfs_file_open(
 }
 
 STATIC int
-xfs_file_close(
-	struct file	*filp,
-	fl_owner_t	id)
-{
-	return -bhv_vop_close(vn_from_inode(filp->f_path.dentry->d_inode), 0,
-				file_count(filp) > 1 ? L_FALSE : L_TRUE, NULL);
-}
-
-STATIC int
 xfs_file_release(
 	struct inode	*inode,
 	struct file	*filp)
@@ -452,7 +419,6 @@ const struct file_operations xfs_file_operations = {
 	.write		= do_sync_write,
 	.aio_read	= xfs_file_aio_read,
 	.aio_write	= xfs_file_aio_write,
-	.sendfile	= xfs_file_sendfile,
 	.splice_read	= xfs_file_splice_read,
 	.splice_write	= xfs_file_splice_write,
 	.unlocked_ioctl	= xfs_file_ioctl,
@@ -461,7 +427,6 @@ const struct file_operations xfs_file_operations = {
 #endif
 	.mmap		= xfs_file_mmap,
 	.open		= xfs_file_open,
-	.flush		= xfs_file_close,
 	.release	= xfs_file_release,
 	.fsync		= xfs_file_fsync,
 #ifdef HAVE_FOP_OPEN_EXEC
@@ -475,7 +440,6 @@ const struct file_operations xfs_invis_file_operations = {
 	.write		= do_sync_write,
 	.aio_read	= xfs_file_aio_read_invis,
 	.aio_write	= xfs_file_aio_write_invis,
-	.sendfile	= xfs_file_sendfile_invis,
 	.splice_read	= xfs_file_splice_read_invis,
 	.splice_write	= xfs_file_splice_write_invis,
 	.unlocked_ioctl	= xfs_file_ioctl_invis,
@@ -484,7 +448,6 @@ const struct file_operations xfs_invis_file_operations = {
 #endif
 	.mmap		= xfs_file_mmap,
 	.open		= xfs_file_open,
-	.flush		= xfs_file_close,
 	.release	= xfs_file_release,
 	.fsync		= xfs_file_fsync,
 };
diff --git a/fs/xfs/linux-2.6/xfs_globals.c b/fs/xfs/linux-2.6/xfs_globals.c
index ed3a5e1..bb72c3d 100644
--- a/fs/xfs/linux-2.6/xfs_globals.c
+++ b/fs/xfs/linux-2.6/xfs_globals.c
@@ -46,6 +46,7 @@ xfs_param_t xfs_params = {
 	.inherit_nosym	= {	0,		0,		1	},
 	.rotorstep	= {	1,		1,		255	},
 	.inherit_nodfrg	= {	0,		1,		1	},
+	.fstrm_timer	= {	1,		50,		3600*100},
 };
 
 /*
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index ff5c41f..5917808 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -1019,7 +1019,7 @@ xfs_ioc_bulkstat(
 
 	if (cmd == XFS_IOC_FSINUMBERS)
 		error = xfs_inumbers(mp, &inlast, &count,
-						bulkreq.ubuffer);
+					bulkreq.ubuffer, xfs_inumbers_fmt);
 	else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
 		error = xfs_bulkstat_single(mp, &inlast,
 						bulkreq.ubuffer, &done);
diff --git a/fs/xfs/linux-2.6/xfs_ioctl32.c b/fs/xfs/linux-2.6/xfs_ioctl32.c
index b83cebc..141cf15 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl32.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl32.c
@@ -23,10 +23,25 @@
 #include <linux/fs.h>
 #include <asm/uaccess.h>
 #include "xfs.h"
-#include "xfs_types.h"
 #include "xfs_fs.h"
+#include "xfs_bit.h"
+#include "xfs_log.h"
+#include "xfs_inum.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_ag.h"
+#include "xfs_dir2.h"
+#include "xfs_dmapi.h"
+#include "xfs_mount.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_attr_sf.h"
+#include "xfs_dir2_sf.h"
 #include "xfs_vfs.h"
 #include "xfs_vnode.h"
+#include "xfs_dinode.h"
+#include "xfs_inode.h"
+#include "xfs_itable.h"
+#include "xfs_error.h"
 #include "xfs_dfrag.h"
 
 #define  _NATIVE_IOC(cmd, type) \
@@ -34,6 +49,7 @@
 
 #if defined(CONFIG_IA64) || defined(CONFIG_X86_64)
 #define BROKEN_X86_ALIGNMENT
+#define _PACKED __attribute__((packed))
 /* on ia32 l_start is on a 32-bit boundary */
 typedef struct xfs_flock64_32 {
 	__s16		l_type;
@@ -75,35 +91,276 @@ xfs_ioctl32_flock(
 	return (unsigned long)p;
 }
 
+typedef struct compat_xfs_fsop_geom_v1 {
+	__u32		blocksize;	/* filesystem (data) block size */
+	__u32		rtextsize;	/* realtime extent size		*/
+	__u32		agblocks;	/* fsblocks in an AG		*/
+	__u32		agcount;	/* number of allocation groups	*/
+	__u32		logblocks;	/* fsblocks in the log		*/
+	__u32		sectsize;	/* (data) sector size, bytes	*/
+	__u32		inodesize;	/* inode size in bytes		*/
+	__u32		imaxpct;	/* max allowed inode space(%)	*/
+	__u64		datablocks;	/* fsblocks in data subvolume	*/
+	__u64		rtblocks;	/* fsblocks in realtime subvol	*/
+	__u64		rtextents;	/* rt extents in realtime subvol*/
+	__u64		logstart;	/* starting fsblock of the log	*/
+	unsigned char	uuid[16];	/* unique id of the filesystem	*/
+	__u32		sunit;		/* stripe unit, fsblocks	*/
+	__u32		swidth;		/* stripe width, fsblocks	*/
+	__s32		version;	/* structure version		*/
+	__u32		flags;		/* superblock version flags	*/
+	__u32		logsectsize;	/* log sector size, bytes	*/
+	__u32		rtsectsize;	/* realtime sector size, bytes	*/
+	__u32		dirblocksize;	/* directory block size, bytes	*/
+} __attribute__((packed)) compat_xfs_fsop_geom_v1_t;
+
+#define XFS_IOC_FSGEOMETRY_V1_32  \
+	_IOR ('X', 100, struct compat_xfs_fsop_geom_v1)
+
+STATIC unsigned long xfs_ioctl32_geom_v1(unsigned long arg)
+{
+	compat_xfs_fsop_geom_v1_t __user *p32 = (void __user *)arg;
+	xfs_fsop_geom_v1_t __user *p = compat_alloc_user_space(sizeof(*p));
+
+	if (copy_in_user(p, p32, sizeof(*p32)))
+		return -EFAULT;
+	return (unsigned long)p;
+}
+
+typedef struct compat_xfs_inogrp {
+	__u64		xi_startino;	/* starting inode number	*/
+	__s32		xi_alloccount;	/* # bits set in allocmask	*/
+	__u64		xi_allocmask;	/* mask of allocated inodes	*/
+} __attribute__((packed)) compat_xfs_inogrp_t;
+
+STATIC int xfs_inumbers_fmt_compat(
+	void __user *ubuffer,
+	const xfs_inogrp_t *buffer,
+	long count,
+	long *written)
+{
+	compat_xfs_inogrp_t *p32 = ubuffer;
+	long i;
+
+	for (i = 0; i < count; i++) {
+		if (put_user(buffer[i].xi_startino,   &p32[i].xi_startino) ||
+		    put_user(buffer[i].xi_alloccount, &p32[i].xi_alloccount) ||
+		    put_user(buffer[i].xi_allocmask,  &p32[i].xi_allocmask))
+			return -EFAULT;
+	}
+	*written = count * sizeof(*p32);
+	return 0;
+}
+
 #else
 
-typedef struct xfs_fsop_bulkreq32 {
+#define xfs_inumbers_fmt_compat xfs_inumbers_fmt
+#define _PACKED
+
+#endif
+
+/* XFS_IOC_FSBULKSTAT and friends */
+
+typedef struct compat_xfs_bstime {
+	__s32		tv_sec;		/* seconds		*/
+	__s32		tv_nsec;	/* and nanoseconds	*/
+} compat_xfs_bstime_t;
+
+STATIC int xfs_bstime_store_compat(
+	compat_xfs_bstime_t __user *p32,
+	const xfs_bstime_t *p)
+{
+	__s32 sec32;
+
+	sec32 = p->tv_sec;
+	if (put_user(sec32, &p32->tv_sec) ||
+	    put_user(p->tv_nsec, &p32->tv_nsec))
+		return -EFAULT;
+	return 0;
+}
+
+typedef struct compat_xfs_bstat {
+	__u64		bs_ino;		/* inode number			*/
+	__u16		bs_mode;	/* type and mode		*/
+	__u16		bs_nlink;	/* number of links		*/
+	__u32		bs_uid;		/* user id			*/
+	__u32		bs_gid;		/* group id			*/
+	__u32		bs_rdev;	/* device value			*/
+	__s32		bs_blksize;	/* block size			*/
+	__s64		bs_size;	/* file size			*/
+	compat_xfs_bstime_t bs_atime;	/* access time			*/
+	compat_xfs_bstime_t bs_mtime;	/* modify time			*/
+	compat_xfs_bstime_t bs_ctime;	/* inode change time		*/
+	int64_t		bs_blocks;	/* number of blocks		*/
+	__u32		bs_xflags;	/* extended flags		*/
+	__s32		bs_extsize;	/* extent size			*/
+	__s32		bs_extents;	/* number of extents		*/
+	__u32		bs_gen;		/* generation count		*/
+	__u16		bs_projid;	/* project id			*/
+	unsigned char	bs_pad[14];	/* pad space, unused		*/
+	__u32		bs_dmevmask;	/* DMIG event mask		*/
+	__u16		bs_dmstate;	/* DMIG state info		*/
+	__u16		bs_aextents;	/* attribute number of extents	*/
+} _PACKED compat_xfs_bstat_t;
+
+STATIC int xfs_bulkstat_one_fmt_compat(
+	void			__user *ubuffer,
+	const xfs_bstat_t	*buffer)
+{
+	compat_xfs_bstat_t __user *p32 = ubuffer;
+
+	if (put_user(buffer->bs_ino, &p32->bs_ino) ||
+	    put_user(buffer->bs_mode, &p32->bs_mode) ||
+	    put_user(buffer->bs_nlink, &p32->bs_nlink) ||
+	    put_user(buffer->bs_uid, &p32->bs_uid) ||
+	    put_user(buffer->bs_gid, &p32->bs_gid) ||
+	    put_user(buffer->bs_rdev, &p32->bs_rdev) ||
+	    put_user(buffer->bs_blksize, &p32->bs_blksize) ||
+	    put_user(buffer->bs_size, &p32->bs_size) ||
+	    xfs_bstime_store_compat(&p32->bs_atime, &buffer->bs_atime) ||
+	    xfs_bstime_store_compat(&p32->bs_mtime, &buffer->bs_mtime) ||
+	    xfs_bstime_store_compat(&p32->bs_ctime, &buffer->bs_ctime) ||
+	    put_user(buffer->bs_blocks, &p32->bs_blocks) ||
+	    put_user(buffer->bs_xflags, &p32->bs_xflags) ||
+	    put_user(buffer->bs_extsize, &p32->bs_extsize) ||
+	    put_user(buffer->bs_extents, &p32->bs_extents) ||
+	    put_user(buffer->bs_gen, &p32->bs_gen) ||
+	    put_user(buffer->bs_projid, &p32->bs_projid) ||
+	    put_user(buffer->bs_dmevmask, &p32->bs_dmevmask) ||
+	    put_user(buffer->bs_dmstate, &p32->bs_dmstate) ||
+	    put_user(buffer->bs_aextents, &p32->bs_aextents))
+		return -EFAULT;
+	return sizeof(*p32);
+}
+
+
+
+typedef struct compat_xfs_fsop_bulkreq {
 	compat_uptr_t	lastip;		/* last inode # pointer		*/
 	__s32		icount;		/* count of entries in buffer	*/
 	compat_uptr_t	ubuffer;	/* user buffer for inode desc.	*/
-	__s32		ocount;		/* output count pointer		*/
-} xfs_fsop_bulkreq32_t;
+	compat_uptr_t	ocount;		/* output count pointer		*/
+} compat_xfs_fsop_bulkreq_t;
 
-STATIC unsigned long
-xfs_ioctl32_bulkstat(
-	unsigned long		arg)
+#define XFS_IOC_FSBULKSTAT_32 \
+	_IOWR('X', 101, struct compat_xfs_fsop_bulkreq)
+#define XFS_IOC_FSBULKSTAT_SINGLE_32 \
+	_IOWR('X', 102, struct compat_xfs_fsop_bulkreq)
+#define XFS_IOC_FSINUMBERS_32 \
+	_IOWR('X', 103, struct compat_xfs_fsop_bulkreq)
+
+/* copied from xfs_ioctl.c */
+STATIC int
+xfs_ioc_bulkstat_compat(
+	xfs_mount_t		*mp,
+	unsigned int		cmd,
+	void			__user *arg)
 {
-	xfs_fsop_bulkreq32_t	__user *p32 = (void __user *)arg;
-	xfs_fsop_bulkreq_t	__user *p = compat_alloc_user_space(sizeof(*p));
+	compat_xfs_fsop_bulkreq_t __user *p32 = (void __user *)arg;
 	u32			addr;
+	xfs_fsop_bulkreq_t	bulkreq;
+	int			count;	/* # of records returned */
+	xfs_ino_t		inlast;	/* last inode number */
+	int			done;
+	int			error;
+
+	/* done = 1 if there are more stats to get and if bulkstat */
+	/* should be called again (unused here, but used in dmapi) */
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (XFS_FORCED_SHUTDOWN(mp))
+		return -XFS_ERROR(EIO);
+
+	if (get_user(addr, &p32->lastip))
+		return -EFAULT;
+	bulkreq.lastip = compat_ptr(addr);
+	if (get_user(bulkreq.icount, &p32->icount) ||
+	    get_user(addr, &p32->ubuffer))
+		return -EFAULT;
+	bulkreq.ubuffer = compat_ptr(addr);
+	if (get_user(addr, &p32->ocount))
+		return -EFAULT;
+	bulkreq.ocount = compat_ptr(addr);
+
+	if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
+		return -XFS_ERROR(EFAULT);
+
+	if ((count = bulkreq.icount) <= 0)
+		return -XFS_ERROR(EINVAL);
+
+	if (cmd == XFS_IOC_FSINUMBERS)
+		error = xfs_inumbers(mp, &inlast, &count,
+				bulkreq.ubuffer, xfs_inumbers_fmt_compat);
+	else {
+		/* declare a var to get a warning in case the type changes */
+		bulkstat_one_fmt_pf formatter = xfs_bulkstat_one_fmt_compat;
+		error = xfs_bulkstat(mp, &inlast, &count,
+			xfs_bulkstat_one, formatter,
+			sizeof(compat_xfs_bstat_t), bulkreq.ubuffer,
+			BULKSTAT_FG_QUICK, &done);
+	}
+	if (error)
+		return -error;
+
+	if (bulkreq.ocount != NULL) {
+		if (copy_to_user(bulkreq.lastip, &inlast,
+						sizeof(xfs_ino_t)))
+			return -XFS_ERROR(EFAULT);
+
+		if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
+			return -XFS_ERROR(EFAULT);
+	}
+
+	return 0;
+}
+
+
+
+typedef struct compat_xfs_fsop_handlereq {
+	__u32		fd;		/* fd for FD_TO_HANDLE		*/
+	compat_uptr_t	path;		/* user pathname		*/
+	__u32		oflags;		/* open flags			*/
+	compat_uptr_t	ihandle;	/* user supplied handle		*/
+	__u32		ihandlen;	/* user supplied length		*/
+	compat_uptr_t	ohandle;	/* user buffer for handle	*/
+	compat_uptr_t	ohandlen;	/* user buffer length		*/
+} compat_xfs_fsop_handlereq_t;
+
+#define XFS_IOC_PATH_TO_FSHANDLE_32 \
+	_IOWR('X', 104, struct compat_xfs_fsop_handlereq)
+#define XFS_IOC_PATH_TO_HANDLE_32 \
+	_IOWR('X', 105, struct compat_xfs_fsop_handlereq)
+#define XFS_IOC_FD_TO_HANDLE_32 \
+	_IOWR('X', 106, struct compat_xfs_fsop_handlereq)
+#define XFS_IOC_OPEN_BY_HANDLE_32 \
+	_IOWR('X', 107, struct compat_xfs_fsop_handlereq)
+#define XFS_IOC_READLINK_BY_HANDLE_32 \
+	_IOWR('X', 108, struct compat_xfs_fsop_handlereq)
+
+STATIC unsigned long xfs_ioctl32_fshandle(unsigned long arg)
+{
+	compat_xfs_fsop_handlereq_t __user *p32 = (void __user *)arg;
+	xfs_fsop_handlereq_t __user *p = compat_alloc_user_space(sizeof(*p));
+	u32 addr;
 
-	if (get_user(addr, &p32->lastip) ||
-	    put_user(compat_ptr(addr), &p->lastip) ||
-	    copy_in_user(&p->icount, &p32->icount, sizeof(s32)) ||
-	    get_user(addr, &p32->ubuffer) ||
-	    put_user(compat_ptr(addr), &p->ubuffer) ||
-	    get_user(addr, &p32->ocount) ||
-	    put_user(compat_ptr(addr), &p->ocount))
+	if (copy_in_user(&p->fd, &p32->fd, sizeof(__u32)) ||
+	    get_user(addr, &p32->path) ||
+	    put_user(compat_ptr(addr), &p->path) ||
+	    copy_in_user(&p->oflags, &p32->oflags, sizeof(__u32)) ||
+	    get_user(addr, &p32->ihandle) ||
+	    put_user(compat_ptr(addr), &p->ihandle) ||
+	    copy_in_user(&p->ihandlen, &p32->ihandlen, sizeof(__u32)) ||
+	    get_user(addr, &p32->ohandle) ||
+	    put_user(compat_ptr(addr), &p->ohandle) ||
+	    get_user(addr, &p32->ohandlen) ||
+	    put_user(compat_ptr(addr), &p->ohandlen))
 		return -EFAULT;
 
 	return (unsigned long)p;
 }
-#endif
+
 
 STATIC long
 xfs_compat_ioctl(
@@ -118,7 +375,6 @@ xfs_compat_ioctl(
 
 	switch (cmd) {
 	case XFS_IOC_DIOINFO:
-	case XFS_IOC_FSGEOMETRY_V1:
 	case XFS_IOC_FSGEOMETRY:
 	case XFS_IOC_GETVERSION:
 	case XFS_IOC_GETXFLAGS:
@@ -131,12 +387,7 @@ xfs_compat_ioctl(
 	case XFS_IOC_GETBMAPA:
 	case XFS_IOC_GETBMAPX:
 /* not handled
-	case XFS_IOC_FD_TO_HANDLE:
-	case XFS_IOC_PATH_TO_HANDLE:
-	case XFS_IOC_PATH_TO_FSHANDLE:
-	case XFS_IOC_OPEN_BY_HANDLE:
 	case XFS_IOC_FSSETDM_BY_HANDLE:
-	case XFS_IOC_READLINK_BY_HANDLE:
 	case XFS_IOC_ATTRLIST_BY_HANDLE:
 	case XFS_IOC_ATTRMULTI_BY_HANDLE:
 */
@@ -166,6 +417,10 @@ xfs_compat_ioctl(
 		arg = xfs_ioctl32_flock(arg);
 		cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
 		break;
+	case XFS_IOC_FSGEOMETRY_V1_32:
+		arg = xfs_ioctl32_geom_v1(arg);
+		cmd = _NATIVE_IOC(cmd, struct xfs_fsop_geom_v1);
+		break;
 
 #else /* These are handled fine if no alignment issues */
 	case XFS_IOC_ALLOCSP:
@@ -176,18 +431,28 @@ xfs_compat_ioctl(
 	case XFS_IOC_FREESP64:
 	case XFS_IOC_RESVSP64:
 	case XFS_IOC_UNRESVSP64:
+	case XFS_IOC_FSGEOMETRY_V1:
 		break;
 
 	/* xfs_bstat_t still has wrong u32 vs u64 alignment */
 	case XFS_IOC_SWAPEXT:
 		break;
 
-	case XFS_IOC_FSBULKSTAT_SINGLE:
-	case XFS_IOC_FSBULKSTAT:
-	case XFS_IOC_FSINUMBERS:
-		arg = xfs_ioctl32_bulkstat(arg);
-		break;
 #endif
+	case XFS_IOC_FSBULKSTAT_32:
+	case XFS_IOC_FSBULKSTAT_SINGLE_32:
+	case XFS_IOC_FSINUMBERS_32:
+		cmd = _NATIVE_IOC(cmd, struct xfs_fsop_bulkreq);
+		return xfs_ioc_bulkstat_compat(XFS_BHVTOI(VNHEAD(vp))->i_mount,
+				cmd, (void*)arg);
+	case XFS_IOC_FD_TO_HANDLE_32:
+	case XFS_IOC_PATH_TO_HANDLE_32:
+	case XFS_IOC_PATH_TO_FSHANDLE_32:
+	case XFS_IOC_OPEN_BY_HANDLE_32:
+	case XFS_IOC_READLINK_BY_HANDLE_32:
+		arg = xfs_ioctl32_fshandle(arg);
+		cmd = _NATIVE_IOC(cmd, struct xfs_fsop_handlereq);
+		break;
 	default:
 		return -ENOIOCTLCMD;
 	}
diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h
index 715adad..330c4ba 100644
--- a/fs/xfs/linux-2.6/xfs_linux.h
+++ b/fs/xfs/linux-2.6/xfs_linux.h
@@ -101,7 +101,6 @@
  * Feature macros (disable/enable)
  */
 #undef  HAVE_REFCACHE	/* reference cache not needed for NFS in 2.6 */
-#define HAVE_SENDFILE	/* sendfile(2) exists in 2.6, but not in 2.4 */
 #define HAVE_SPLICE	/* a splice(2) exists in 2.6, but not in 2.4 */
 #ifdef CONFIG_SMP
 #define HAVE_PERCPU_SB	/* per cpu superblock counters are a 2.6 feature */
@@ -124,6 +123,7 @@
 #define xfs_inherit_nosymlinks	xfs_params.inherit_nosym.val
 #define xfs_rotorstep		xfs_params.rotorstep.val
 #define xfs_inherit_nodefrag	xfs_params.inherit_nodfrg.val
+#define xfs_fstrm_centisecs	xfs_params.fstrm_timer.val
 
 #define current_cpu()		(raw_smp_processor_id())
 #define current_pid()		(current->pid)
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index ed90403..765ec16 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -287,50 +287,6 @@ xfs_read(
 }
 
 ssize_t
-xfs_sendfile(
-	bhv_desc_t		*bdp,
-	struct file		*filp,
-	loff_t			*offset,
-	int			ioflags,
-	size_t			count,
-	read_actor_t		actor,
-	void			*target,
-	cred_t			*credp)
-{
-	xfs_inode_t		*ip = XFS_BHVTOI(bdp);
-	xfs_mount_t		*mp = ip->i_mount;
-	ssize_t			ret;
-
-	XFS_STATS_INC(xs_read_calls);
-	if (XFS_FORCED_SHUTDOWN(mp))
-		return -EIO;
-
-	xfs_ilock(ip, XFS_IOLOCK_SHARED);
-
-	if (DM_EVENT_ENABLED(BHV_TO_VNODE(bdp)->v_vfsp, ip, DM_EVENT_READ) &&
-	    (!(ioflags & IO_INVIS))) {
-		bhv_vrwlock_t locktype = VRWLOCK_READ;
-		int error;
-
-		error = XFS_SEND_DATA(mp, DM_EVENT_READ, BHV_TO_VNODE(bdp),
-				      *offset, count,
-				      FILP_DELAY_FLAG(filp), &locktype);
-		if (error) {
-			xfs_iunlock(ip, XFS_IOLOCK_SHARED);
-			return -error;
-		}
-	}
-	xfs_rw_enter_trace(XFS_SENDFILE_ENTER, &ip->i_iocore,
-		   (void *)(unsigned long)target, count, *offset, ioflags);
-	ret = generic_file_sendfile(filp, offset, count, actor, target);
-	if (ret > 0)
-		XFS_STATS_ADD(xs_read_bytes, ret);
-
-	xfs_iunlock(ip, XFS_IOLOCK_SHARED);
-	return ret;
-}
-
-ssize_t
 xfs_splice_read(
 	bhv_desc_t		*bdp,
 	struct file		*infilp,
diff --git a/fs/xfs/linux-2.6/xfs_lrw.h b/fs/xfs/linux-2.6/xfs_lrw.h
index 7ac51b1..7c60a1e 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.h
+++ b/fs/xfs/linux-2.6/xfs_lrw.h
@@ -90,9 +90,6 @@ extern ssize_t xfs_read(struct bhv_desc *, struct kiocb *,
 extern ssize_t xfs_write(struct bhv_desc *, struct kiocb *,
 				const struct iovec *, unsigned int,
 				loff_t *, int, struct cred *);
-extern ssize_t xfs_sendfile(struct bhv_desc *, struct file *,
-				loff_t *, int, size_t, read_actor_t,
-				void *, struct cred *);
 extern ssize_t xfs_splice_read(struct bhv_desc *, struct file *, loff_t *,
 				struct pipe_inode_info *, size_t, int, int,
 				struct cred *);
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index bf9a9d5..4528f9a 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -547,7 +547,8 @@ vfs_sync_worker(
 
 	if (!(vfsp->vfs_flag & VFS_RDONLY))
 		error = bhv_vfs_sync(vfsp, SYNC_FSDATA | SYNC_BDFLUSH | \
-					SYNC_ATTR | SYNC_REFCACHE, NULL);
+					SYNC_ATTR | SYNC_REFCACHE | SYNC_SUPER,
+					NULL);
 	vfsp->vfs_sync_seq++;
 	wake_up(&vfsp->vfs_wait_single_sync_task);
 }
@@ -561,6 +562,7 @@ xfssyncd(
 	bhv_vfs_sync_work_t	*work, *n;
 	LIST_HEAD		(tmp);
 
+	set_freezable();
 	timeleft = xfs_syncd_centisecs * msecs_to_jiffies(10);
 	for (;;) {
 		timeleft = schedule_timeout_interruptible(timeleft);
@@ -663,7 +665,7 @@ xfs_fs_sync_super(
 		 * occur here so don't bother flushing the buftarg (i.e
 		 * SYNC_QUIESCE) because it'll just get dirty again.
 		 */
-		flags = SYNC_FSDATA | SYNC_DELWRI | SYNC_WAIT | SYNC_IOWAIT;
+		flags = SYNC_DATA_QUIESCE;
 	} else
 		flags = SYNC_FSDATA | (wait ? SYNC_WAIT : 0);
 
diff --git a/fs/xfs/linux-2.6/xfs_super.h b/fs/xfs/linux-2.6/xfs_super.h
index 33dd1ca..201cc32 100644
--- a/fs/xfs/linux-2.6/xfs_super.h
+++ b/fs/xfs/linux-2.6/xfs_super.h
@@ -18,6 +18,8 @@
 #ifndef __XFS_SUPER_H__
 #define __XFS_SUPER_H__
 
+#include <linux/exportfs.h>
+
 #ifdef CONFIG_XFS_DMAPI
 # define vfs_insertdmapi(vfs)	vfs_insertops(vfsp, &xfs_dmops)
 # define vfs_initdmapi()	dmapi_init()
diff --git a/fs/xfs/linux-2.6/xfs_sysctl.c b/fs/xfs/linux-2.6/xfs_sysctl.c
index cd6eaa4..bb997d7 100644
--- a/fs/xfs/linux-2.6/xfs_sysctl.c
+++ b/fs/xfs/linux-2.6/xfs_sysctl.c
@@ -210,6 +210,17 @@ static ctl_table xfs_table[] = {
 		.extra1		= &xfs_params.inherit_nodfrg.min,
 		.extra2		= &xfs_params.inherit_nodfrg.max
 	},
+	{
+		.ctl_name	= XFS_FILESTREAM_TIMER,
+		.procname	= "filestream_centisecs",
+		.data		= &xfs_params.fstrm_timer.val,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= &proc_dointvec_minmax,
+		.strategy	= &sysctl_intvec,
+		.extra1		= &xfs_params.fstrm_timer.min,
+		.extra2		= &xfs_params.fstrm_timer.max,
+	},
 	/* please keep this the last entry */
 #ifdef CONFIG_PROC_FS
 	{
diff --git a/fs/xfs/linux-2.6/xfs_sysctl.h b/fs/xfs/linux-2.6/xfs_sysctl.h
index a631fb8..98b97e3 100644
--- a/fs/xfs/linux-2.6/xfs_sysctl.h
+++ b/fs/xfs/linux-2.6/xfs_sysctl.h
@@ -47,6 +47,7 @@ typedef struct xfs_param {
 	xfs_sysctl_val_t inherit_nosym;	/* Inherit the "nosymlinks" flag. */
 	xfs_sysctl_val_t rotorstep;	/* inode32 AG rotoring control knob */
 	xfs_sysctl_val_t inherit_nodfrg;/* Inherit the "nodefrag" inode flag. */
+	xfs_sysctl_val_t fstrm_timer;	/* Filestream dir-AG assoc'n timeout. */
 } xfs_param_t;
 
 /*
@@ -86,6 +87,7 @@ enum {
 	XFS_INHERIT_NOSYM = 19,
 	XFS_ROTORSTEP = 20,
 	XFS_INHERIT_NODFRG = 21,
+	XFS_FILESTREAM_TIMER = 22,
 };
 
 extern xfs_param_t	xfs_params;
diff --git a/fs/xfs/linux-2.6/xfs_vfs.h b/fs/xfs/linux-2.6/xfs_vfs.h
index e2c2ce9..dca3481 100644
--- a/fs/xfs/linux-2.6/xfs_vfs.h
+++ b/fs/xfs/linux-2.6/xfs_vfs.h
@@ -92,6 +92,21 @@ typedef enum {
 #define SYNC_REFCACHE		0x0040  /* prune some of the nfs ref cache */
 #define SYNC_REMOUNT		0x0080  /* remount readonly, no dummy LRs */
 #define SYNC_IOWAIT		0x0100  /* wait for all I/O to complete */
+#define SYNC_SUPER		0x0200  /* flush superblock to disk */
+
+/*
+ * When remounting a filesystem read-only or freezing the filesystem,
+ * we have two phases to execute. This first phase is syncing the data
+ * before we quiesce the fielsystem, and the second is flushing all the
+ * inodes out after we've waited for all the transactions created by
+ * the first phase to complete. The second phase uses SYNC_INODE_QUIESCE
+ * to ensure that the inodes are written to their location on disk
+ * rather than just existing in transactions in the log. This means
+ * after a quiesce there is no log replay required to write the inodes
+ * to disk (this is the main difference between a sync and a quiesce).
+ */
+#define SYNC_DATA_QUIESCE	(SYNC_DELWRI|SYNC_FSDATA|SYNC_WAIT|SYNC_IOWAIT)
+#define SYNC_INODE_QUIESCE	(SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT)
 
 #define SHUTDOWN_META_IO_ERROR	0x0001	/* write attempt to metadata failed */
 #define SHUTDOWN_LOG_IO_ERROR	0x0002	/* write attempt to the log failed */
diff --git a/fs/xfs/linux-2.6/xfs_vnode.h b/fs/xfs/linux-2.6/xfs_vnode.h
index d1b2d01..5742d65 100644
--- a/fs/xfs/linux-2.6/xfs_vnode.h
+++ b/fs/xfs/linux-2.6/xfs_vnode.h
@@ -129,19 +129,13 @@ typedef enum bhv_vchange {
 	VCHANGE_FLAGS_IOEXCL_COUNT	= 4
 } bhv_vchange_t;
 
-typedef enum { L_FALSE, L_TRUE } lastclose_t;
-
 typedef int	(*vop_open_t)(bhv_desc_t *, struct cred *);
-typedef int	(*vop_close_t)(bhv_desc_t *, int, lastclose_t, struct cred *);
 typedef ssize_t (*vop_read_t)(bhv_desc_t *, struct kiocb *,
 				const struct iovec *, unsigned int,
 				loff_t *, int, struct cred *);
 typedef ssize_t (*vop_write_t)(bhv_desc_t *, struct kiocb *,
 				const struct iovec *, unsigned int,
 				loff_t *, int, struct cred *);
-typedef ssize_t (*vop_sendfile_t)(bhv_desc_t *, struct file *,
-				loff_t *, int, size_t, read_actor_t,
-				void *, struct cred *);
 typedef ssize_t (*vop_splice_read_t)(bhv_desc_t *, struct file *, loff_t *,
 				struct pipe_inode_info *, size_t, int, int,
 				struct cred *);
@@ -203,10 +197,8 @@ typedef int	(*vop_iflush_t)(bhv_desc_t *, int);
 typedef struct bhv_vnodeops {
 	bhv_position_t  vn_position;    /* position within behavior chain */
 	vop_open_t		vop_open;
-	vop_close_t		vop_close;
 	vop_read_t		vop_read;
 	vop_write_t		vop_write;
-	vop_sendfile_t		vop_sendfile;
 	vop_splice_read_t	vop_splice_read;
 	vop_splice_write_t	vop_splice_write;
 	vop_ioctl_t		vop_ioctl;
@@ -249,13 +241,10 @@ typedef struct bhv_vnodeops {
 #define VNHEAD(vp)	((vp)->v_bh.bh_first)
 #define VOP(op, vp)	(*((bhv_vnodeops_t *)VNHEAD(vp)->bd_ops)->op)
 #define bhv_vop_open(vp, cr)		VOP(vop_open, vp)(VNHEAD(vp),cr)
-#define bhv_vop_close(vp, f,last,cr)	VOP(vop_close, vp)(VNHEAD(vp),f,last,cr)
 #define bhv_vop_read(vp,file,iov,segs,offset,ioflags,cr)		\
 		VOP(vop_read, vp)(VNHEAD(vp),file,iov,segs,offset,ioflags,cr)
 #define bhv_vop_write(vp,file,iov,segs,offset,ioflags,cr)		\
 		VOP(vop_write, vp)(VNHEAD(vp),file,iov,segs,offset,ioflags,cr)
-#define bhv_vop_sendfile(vp,f,off,ioflags,cnt,act,targ,cr)		\
-		VOP(vop_sendfile, vp)(VNHEAD(vp),f,off,ioflags,cnt,act,targ,cr)
 #define bhv_vop_splice_read(vp,f,o,pipe,cnt,fl,iofl,cr)			\
 		VOP(vop_splice_read, vp)(VNHEAD(vp),f,o,pipe,cnt,fl,iofl,cr)
 #define bhv_vop_splice_write(vp,f,o,pipe,cnt,fl,iofl,cr)		\
diff --git a/fs/xfs/quota/xfs_qm.c b/fs/xfs/quota/xfs_qm.c
index 3e4a8ad..2d274b2 100644
--- a/fs/xfs/quota/xfs_qm.c
+++ b/fs/xfs/quota/xfs_qm.c
@@ -62,10 +62,8 @@ uint		ndquot;
 
 kmem_zone_t	*qm_dqzone;
 kmem_zone_t	*qm_dqtrxzone;
-static kmem_shaker_t	xfs_qm_shaker;
 
 static cred_t	xfs_zerocr;
-static xfs_inode_t	xfs_zeroino;
 
 STATIC void	xfs_qm_list_init(xfs_dqlist_t *, char *, int);
 STATIC void	xfs_qm_list_destroy(xfs_dqlist_t *);
@@ -79,6 +77,11 @@ STATIC int	xfs_qm_init_quotainos(xfs_mount_t *);
 STATIC int	xfs_qm_init_quotainfo(xfs_mount_t *);
 STATIC int	xfs_qm_shake(int, gfp_t);
 
+static struct shrinker xfs_qm_shaker = {
+	.shrink = xfs_qm_shake,
+	.seeks = DEFAULT_SEEKS,
+};
+
 #ifdef DEBUG
 extern mutex_t	qcheck_lock;
 #endif
@@ -150,7 +153,7 @@ xfs_Gqm_init(void)
 	} else
 		xqm->qm_dqzone = qm_dqzone;
 
-	xfs_qm_shaker = kmem_shake_register(xfs_qm_shake);
+	register_shrinker(&xfs_qm_shaker);
 
 	/*
 	 * The t_dqinfo portion of transactions.
@@ -182,7 +185,7 @@ xfs_qm_destroy(
 
 	ASSERT(xqm != NULL);
 	ASSERT(xqm->qm_nrefs == 0);
-	kmem_shake_deregister(xfs_qm_shaker);
+	unregister_shrinker(&xfs_qm_shaker);
 	hsize = xqm->qm_dqhashmask + 1;
 	for (i = 0; i < hsize; i++) {
 		xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i]));
@@ -1415,7 +1418,7 @@ xfs_qm_qino_alloc(
 		return error;
 	}
 
-	if ((error = xfs_dir_ialloc(&tp, &xfs_zeroino, S_IFREG, 1, 0,
+	if ((error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0,
 				   &xfs_zerocr, 0, 1, ip, &committed))) {
 		xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
 				 XFS_TRANS_ABORT);
diff --git a/fs/xfs/xfs.h b/fs/xfs/xfs.h
index bf0a120..b5a7d92 100644
--- a/fs/xfs/xfs.h
+++ b/fs/xfs/xfs.h
@@ -38,6 +38,7 @@
 #define XFS_RW_TRACE 1
 #define XFS_BUF_TRACE 1
 #define XFS_VNODE_TRACE 1
+#define XFS_FILESTREAMS_TRACE 1
 #endif
 
 #include <linux-2.6/xfs_linux.h>
diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h
index 9ece7f87..51c09c1 100644
--- a/fs/xfs/xfs_ag.h
+++ b/fs/xfs/xfs_ag.h
@@ -68,6 +68,7 @@ typedef struct xfs_agf {
 	__be32		agf_flcount;	/* count of blocks in freelist */
 	__be32		agf_freeblks;	/* total free blocks */
 	__be32		agf_longest;	/* longest free space */
+	__be32		agf_btreeblks;	/* # of blocks held in AGF btrees */
 } xfs_agf_t;
 
 #define	XFS_AGF_MAGICNUM	0x00000001
@@ -81,7 +82,8 @@ typedef struct xfs_agf {
 #define	XFS_AGF_FLCOUNT		0x00000100
 #define	XFS_AGF_FREEBLKS	0x00000200
 #define	XFS_AGF_LONGEST		0x00000400
-#define	XFS_AGF_NUM_BITS	11
+#define	XFS_AGF_BTREEBLKS	0x00000800
+#define	XFS_AGF_NUM_BITS	12
 #define	XFS_AGF_ALL_BITS	((1 << XFS_AGF_NUM_BITS) - 1)
 
 /* disk block (xfs_daddr_t) in the AG */
@@ -186,12 +188,15 @@ typedef struct xfs_perag
 	__uint32_t	pagf_flcount;	/* count of blocks in freelist */
 	xfs_extlen_t	pagf_freeblks;	/* total free blocks */
 	xfs_extlen_t	pagf_longest;	/* longest free space */
+	__uint32_t	pagf_btreeblks;	/* # of blocks held in AGF btrees */
 	xfs_agino_t	pagi_freecount;	/* number of free inodes */
+	xfs_agino_t	pagi_count;	/* number of allocated inodes */
+	int		pagb_count;	/* pagb slots in use */
 #ifdef __KERNEL__
 	lock_t		pagb_lock;	/* lock for pagb_list */
 #endif
-	int		pagb_count;	/* pagb slots in use */
 	xfs_perag_busy_t *pagb_list;	/* unstable blocks */
+	atomic_t        pagf_fstrms;    /* # of filestreams active in this AG */
 } xfs_perag_t;
 
 #define	XFS_AG_MAXLEVELS(mp)		((mp)->m_ag_maxlevels)
diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c
index 8e9a40a..012a649 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/xfs_alloc.c
@@ -55,17 +55,17 @@ xfs_alloc_search_busy(xfs_trans_t *tp,
 ktrace_t *xfs_alloc_trace_buf;
 
 #define	TRACE_ALLOC(s,a)	\
-	xfs_alloc_trace_alloc(fname, s, a, __LINE__)
+	xfs_alloc_trace_alloc(__FUNCTION__, s, a, __LINE__)
 #define	TRACE_FREE(s,a,b,x,f)	\
-	xfs_alloc_trace_free(fname, s, mp, a, b, x, f, __LINE__)
+	xfs_alloc_trace_free(__FUNCTION__, s, mp, a, b, x, f, __LINE__)
 #define	TRACE_MODAGF(s,a,f)	\
-	xfs_alloc_trace_modagf(fname, s, mp, a, f, __LINE__)
-#define	TRACE_BUSY(fname,s,ag,agb,l,sl,tp)	\
-	xfs_alloc_trace_busy(fname, s, mp, ag, agb, l, sl, tp, XFS_ALLOC_KTRACE_BUSY, __LINE__)
-#define	TRACE_UNBUSY(fname,s,ag,sl,tp)	\
-	xfs_alloc_trace_busy(fname, s, mp, ag, -1, -1, sl, tp, XFS_ALLOC_KTRACE_UNBUSY, __LINE__)
-#define	TRACE_BUSYSEARCH(fname,s,ag,agb,l,sl,tp)	\
-	xfs_alloc_trace_busy(fname, s, mp, ag, agb, l, sl, tp, XFS_ALLOC_KTRACE_BUSYSEARCH, __LINE__)
+	xfs_alloc_trace_modagf(__FUNCTION__, s, mp, a, f, __LINE__)
+#define	TRACE_BUSY(__FUNCTION__,s,ag,agb,l,sl,tp)	\
+	xfs_alloc_trace_busy(__FUNCTION__, s, mp, ag, agb, l, sl, tp, XFS_ALLOC_KTRACE_BUSY, __LINE__)
+#define	TRACE_UNBUSY(__FUNCTION__,s,ag,sl,tp)	\
+	xfs_alloc_trace_busy(__FUNCTION__, s, mp, ag, -1, -1, sl, tp, XFS_ALLOC_KTRACE_UNBUSY, __LINE__)
+#define	TRACE_BUSYSEARCH(__FUNCTION__,s,ag,agb,l,sl,tp)	\
+	xfs_alloc_trace_busy(__FUNCTION__, s, mp, ag, agb, l, sl, tp, XFS_ALLOC_KTRACE_BUSYSEARCH, __LINE__)
 #else
 #define	TRACE_ALLOC(s,a)
 #define	TRACE_FREE(s,a,b,x,f)
@@ -420,7 +420,7 @@ xfs_alloc_read_agfl(
  */
 STATIC void
 xfs_alloc_trace_alloc(
-	char		*name,		/* function tag string */
+	const char	*name,		/* function tag string */
 	char		*str,		/* additional string */
 	xfs_alloc_arg_t	*args,		/* allocation argument structure */
 	int		line)		/* source line number */
@@ -453,7 +453,7 @@ xfs_alloc_trace_alloc(
  */
 STATIC void
 xfs_alloc_trace_free(
-	char		*name,		/* function tag string */
+	const char	*name,		/* function tag string */
 	char		*str,		/* additional string */
 	xfs_mount_t	*mp,		/* file system mount point */
 	xfs_agnumber_t	agno,		/* allocation group number */
@@ -479,7 +479,7 @@ xfs_alloc_trace_free(
  */
 STATIC void
 xfs_alloc_trace_modagf(
-	char		*name,		/* function tag string */
+	const char	*name,		/* function tag string */
 	char		*str,		/* additional string */
 	xfs_mount_t	*mp,		/* file system mount point */
 	xfs_agf_t	*agf,		/* new agf value */
@@ -507,7 +507,7 @@ xfs_alloc_trace_modagf(
 
 STATIC void
 xfs_alloc_trace_busy(
-	char		*name,		/* function tag string */
+	const char	*name,		/* function tag string */
 	char		*str,		/* additional string */
 	xfs_mount_t	*mp,		/* file system mount point */
 	xfs_agnumber_t	agno,		/* allocation group number */
@@ -549,9 +549,6 @@ xfs_alloc_ag_vextent(
 	xfs_alloc_arg_t	*args)	/* argument structure for allocation */
 {
 	int		error=0;
-#ifdef XFS_ALLOC_TRACE
-	static char	fname[] = "xfs_alloc_ag_vextent";
-#endif
 
 	ASSERT(args->minlen > 0);
 	ASSERT(args->maxlen > 0);
@@ -635,9 +632,6 @@ xfs_alloc_ag_vextent_exact(
 	xfs_agblock_t	fbno;	/* start block of found extent */
 	xfs_agblock_t	fend;	/* end block of found extent */
 	xfs_extlen_t	flen;	/* length of found extent */
-#ifdef XFS_ALLOC_TRACE
-	static char	fname[] = "xfs_alloc_ag_vextent_exact";
-#endif
 	int		i;	/* success/failure of operation */
 	xfs_agblock_t	maxend;	/* end of maximal extent */
 	xfs_agblock_t	minend;	/* end of minimal extent */
@@ -737,9 +731,6 @@ xfs_alloc_ag_vextent_near(
 	xfs_btree_cur_t	*bno_cur_gt;	/* cursor for bno btree, right side */
 	xfs_btree_cur_t	*bno_cur_lt;	/* cursor for bno btree, left side */
 	xfs_btree_cur_t	*cnt_cur;	/* cursor for count btree */
-#ifdef XFS_ALLOC_TRACE
-	static char	fname[] = "xfs_alloc_ag_vextent_near";
-#endif
 	xfs_agblock_t	gtbno;		/* start bno of right side entry */
 	xfs_agblock_t	gtbnoa;		/* aligned ... */
 	xfs_extlen_t	gtdiff;		/* difference to right side entry */
@@ -1270,9 +1261,6 @@ xfs_alloc_ag_vextent_size(
 	int		error;		/* error result */
 	xfs_agblock_t	fbno;		/* start of found freespace */
 	xfs_extlen_t	flen;		/* length of found freespace */
-#ifdef XFS_ALLOC_TRACE
-	static char	fname[] = "xfs_alloc_ag_vextent_size";
-#endif
 	int		i;		/* temp status variable */
 	xfs_agblock_t	rbno;		/* returned block number */
 	xfs_extlen_t	rlen;		/* length of returned extent */
@@ -1427,9 +1415,6 @@ xfs_alloc_ag_vextent_small(
 	int		error;
 	xfs_agblock_t	fbno;
 	xfs_extlen_t	flen;
-#ifdef XFS_ALLOC_TRACE
-	static char	fname[] = "xfs_alloc_ag_vextent_small";
-#endif
 	int		i;
 
 	if ((error = xfs_alloc_decrement(ccur, 0, &i)))
@@ -1447,7 +1432,8 @@ xfs_alloc_ag_vextent_small(
 	else if (args->minlen == 1 && args->alignment == 1 && !args->isfl &&
 		 (be32_to_cpu(XFS_BUF_TO_AGF(args->agbp)->agf_flcount)
 		  > args->minleft)) {
-		if ((error = xfs_alloc_get_freelist(args->tp, args->agbp, &fbno)))
+		error = xfs_alloc_get_freelist(args->tp, args->agbp, &fbno, 0);
+		if (error)
 			goto error0;
 		if (fbno != NULLAGBLOCK) {
 			if (args->userdata) {
@@ -1515,9 +1501,6 @@ xfs_free_ag_extent(
 	xfs_btree_cur_t	*bno_cur;	/* cursor for by-block btree */
 	xfs_btree_cur_t	*cnt_cur;	/* cursor for by-size btree */
 	int		error;		/* error return value */
-#ifdef XFS_ALLOC_TRACE
-	static char	fname[] = "xfs_free_ag_extent";
-#endif
 	xfs_agblock_t	gtbno;		/* start of right neighbor block */
 	xfs_extlen_t	gtlen;		/* length of right neighbor block */
 	int		haveleft;	/* have a left neighbor block */
@@ -1923,7 +1906,8 @@ xfs_alloc_fix_freelist(
 	while (be32_to_cpu(agf->agf_flcount) > need) {
 		xfs_buf_t	*bp;
 
-		if ((error = xfs_alloc_get_freelist(tp, agbp, &bno)))
+		error = xfs_alloc_get_freelist(tp, agbp, &bno, 0);
+		if (error)
 			return error;
 		if ((error = xfs_free_ag_extent(tp, agbp, args->agno, bno, 1, 1)))
 			return error;
@@ -1973,8 +1957,9 @@ xfs_alloc_fix_freelist(
 		 * Put each allocated block on the list.
 		 */
 		for (bno = targs.agbno; bno < targs.agbno + targs.len; bno++) {
-			if ((error = xfs_alloc_put_freelist(tp, agbp, agflbp,
-					bno)))
+			error = xfs_alloc_put_freelist(tp, agbp,
+							agflbp, bno, 0);
+			if (error)
 				return error;
 		}
 	}
@@ -1991,16 +1976,15 @@ int				/* error */
 xfs_alloc_get_freelist(
 	xfs_trans_t	*tp,	/* transaction pointer */
 	xfs_buf_t	*agbp,	/* buffer containing the agf structure */
-	xfs_agblock_t	*bnop)	/* block address retrieved from freelist */
+	xfs_agblock_t	*bnop,	/* block address retrieved from freelist */
+	int		btreeblk) /* destination is a AGF btree */
 {
 	xfs_agf_t	*agf;	/* a.g. freespace structure */
 	xfs_agfl_t	*agfl;	/* a.g. freelist structure */
 	xfs_buf_t	*agflbp;/* buffer for a.g. freelist structure */
 	xfs_agblock_t	bno;	/* block number returned */
 	int		error;
-#ifdef XFS_ALLOC_TRACE
-	static char	fname[] = "xfs_alloc_get_freelist";
-#endif
+	int		logflags;
 	xfs_mount_t	*mp;	/* mount structure */
 	xfs_perag_t	*pag;	/* per allocation group data */
 
@@ -2032,8 +2016,16 @@ xfs_alloc_get_freelist(
 	be32_add(&agf->agf_flcount, -1);
 	xfs_trans_agflist_delta(tp, -1);
 	pag->pagf_flcount--;
-	TRACE_MODAGF(NULL, agf, XFS_AGF_FLFIRST | XFS_AGF_FLCOUNT);
-	xfs_alloc_log_agf(tp, agbp, XFS_AGF_FLFIRST | XFS_AGF_FLCOUNT);
+
+	logflags = XFS_AGF_FLFIRST | XFS_AGF_FLCOUNT;
+	if (btreeblk) {
+		be32_add(&agf->agf_btreeblks, 1);
+		pag->pagf_btreeblks++;
+		logflags |= XFS_AGF_BTREEBLKS;
+	}
+
+	TRACE_MODAGF(NULL, agf, logflags);
+	xfs_alloc_log_agf(tp, agbp, logflags);
 	*bnop = bno;
 
 	/*
@@ -2071,6 +2063,7 @@ xfs_alloc_log_agf(
 		offsetof(xfs_agf_t, agf_flcount),
 		offsetof(xfs_agf_t, agf_freeblks),
 		offsetof(xfs_agf_t, agf_longest),
+		offsetof(xfs_agf_t, agf_btreeblks),
 		sizeof(xfs_agf_t)
 	};
 
@@ -2106,15 +2099,14 @@ xfs_alloc_put_freelist(
 	xfs_trans_t		*tp,	/* transaction pointer */
 	xfs_buf_t		*agbp,	/* buffer for a.g. freelist header */
 	xfs_buf_t		*agflbp,/* buffer for a.g. free block array */
-	xfs_agblock_t		bno)	/* block being freed */
+	xfs_agblock_t		bno,	/* block being freed */
+	int			btreeblk) /* block came from a AGF btree */
 {
 	xfs_agf_t		*agf;	/* a.g. freespace structure */
 	xfs_agfl_t		*agfl;	/* a.g. free block array */
 	__be32			*blockp;/* pointer to array entry */
 	int			error;
-#ifdef XFS_ALLOC_TRACE
-	static char		fname[] = "xfs_alloc_put_freelist";
-#endif
+	int			logflags;
 	xfs_mount_t		*mp;	/* mount structure */
 	xfs_perag_t		*pag;	/* per allocation group data */
 
@@ -2132,11 +2124,22 @@ xfs_alloc_put_freelist(
 	be32_add(&agf->agf_flcount, 1);
 	xfs_trans_agflist_delta(tp, 1);
 	pag->pagf_flcount++;
+
+	logflags = XFS_AGF_FLLAST | XFS_AGF_FLCOUNT;
+	if (btreeblk) {
+		be32_add(&agf->agf_btreeblks, -1);
+		pag->pagf_btreeblks--;
+		logflags |= XFS_AGF_BTREEBLKS;
+	}
+
+	TRACE_MODAGF(NULL, agf, logflags);
+	xfs_alloc_log_agf(tp, agbp, logflags);
+
 	ASSERT(be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp));
 	blockp = &agfl->agfl_bno[be32_to_cpu(agf->agf_fllast)];
 	*blockp = cpu_to_be32(bno);
-	TRACE_MODAGF(NULL, agf, XFS_AGF_FLLAST | XFS_AGF_FLCOUNT);
-	xfs_alloc_log_agf(tp, agbp, XFS_AGF_FLLAST | XFS_AGF_FLCOUNT);
+	TRACE_MODAGF(NULL, agf, logflags);
+	xfs_alloc_log_agf(tp, agbp, logflags);
 	xfs_trans_log_buf(tp, agflbp,
 		(int)((xfs_caddr_t)blockp - (xfs_caddr_t)agfl),
 		(int)((xfs_caddr_t)blockp - (xfs_caddr_t)agfl +
@@ -2196,6 +2199,7 @@ xfs_alloc_read_agf(
 	pag = &mp->m_perag[agno];
 	if (!pag->pagf_init) {
 		pag->pagf_freeblks = be32_to_cpu(agf->agf_freeblks);
+		pag->pagf_btreeblks = be32_to_cpu(agf->agf_btreeblks);
 		pag->pagf_flcount = be32_to_cpu(agf->agf_flcount);
 		pag->pagf_longest = be32_to_cpu(agf->agf_longest);
 		pag->pagf_levels[XFS_BTNUM_BNOi] =
@@ -2235,9 +2239,6 @@ xfs_alloc_vextent(
 	xfs_agblock_t	agsize;	/* allocation group size */
 	int		error;
 	int		flags;	/* XFS_ALLOC_FLAG_... locking flags */
-#ifdef XFS_ALLOC_TRACE
-	static char	fname[] = "xfs_alloc_vextent";
-#endif
 	xfs_extlen_t	minleft;/* minimum left value, temp copy */
 	xfs_mount_t	*mp;	/* mount structure pointer */
 	xfs_agnumber_t	sagno;	/* starting allocation group number */
diff --git a/fs/xfs/xfs_alloc.h b/fs/xfs/xfs_alloc.h
index 5a42561..5aec15d 100644
--- a/fs/xfs/xfs_alloc.h
+++ b/fs/xfs/xfs_alloc.h
@@ -136,7 +136,8 @@ int				/* error */
 xfs_alloc_get_freelist(
 	struct xfs_trans *tp,	/* transaction pointer */
 	struct xfs_buf	*agbp,	/* buffer containing the agf structure */
-	xfs_agblock_t	*bnop);	/* block address retrieved from freelist */
+	xfs_agblock_t	*bnop,	/* block address retrieved from freelist */
+	int		btreeblk); /* destination is a AGF btree */
 
 /*
  * Log the given fields from the agf structure.
@@ -165,7 +166,8 @@ xfs_alloc_put_freelist(
 	struct xfs_trans *tp,	/* transaction pointer */
 	struct xfs_buf	*agbp,	/* buffer for a.g. freelist header */
 	struct xfs_buf	*agflbp,/* buffer for a.g. free block array */
-	xfs_agblock_t	bno);	/* block being freed */
+	xfs_agblock_t	bno,	/* block being freed */
+	int		btreeblk); /* owner was a AGF btree */
 
 /*
  * Read in the allocation group header (free/alloc section).
diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c
index 74cadf9..1603ce5 100644
--- a/fs/xfs/xfs_alloc_btree.c
+++ b/fs/xfs/xfs_alloc_btree.c
@@ -226,8 +226,9 @@ xfs_alloc_delrec(
 			/*
 			 * Put this buffer/block on the ag's freelist.
 			 */
-			if ((error = xfs_alloc_put_freelist(cur->bc_tp,
-					cur->bc_private.a.agbp, NULL, bno)))
+			error = xfs_alloc_put_freelist(cur->bc_tp,
+					cur->bc_private.a.agbp, NULL, bno, 1);
+			if (error)
 				return error;
 			/*
 			 * Since blocks move to the free list without the
@@ -549,8 +550,9 @@ xfs_alloc_delrec(
 	/*
 	 * Free the deleting block by putting it on the freelist.
 	 */
-	if ((error = xfs_alloc_put_freelist(cur->bc_tp, cur->bc_private.a.agbp,
-			NULL, rbno)))
+	error = xfs_alloc_put_freelist(cur->bc_tp,
+					 cur->bc_private.a.agbp, NULL, rbno, 1);
+	if (error)
 		return error;
 	/*
 	 * Since blocks move to the free list without the coordination
@@ -1320,8 +1322,9 @@ xfs_alloc_newroot(
 	/*
 	 * Get a buffer from the freelist blocks, for the new root.
 	 */
-	if ((error = xfs_alloc_get_freelist(cur->bc_tp, cur->bc_private.a.agbp,
-			&nbno)))
+	error = xfs_alloc_get_freelist(cur->bc_tp,
+					cur->bc_private.a.agbp, &nbno, 1);
+	if (error)
 		return error;
 	/*
 	 * None available, we fail.
@@ -1604,8 +1607,9 @@ xfs_alloc_split(
 	 * Allocate the new block from the freelist.
 	 * If we can't do it, we're toast.  Give up.
 	 */
-	if ((error = xfs_alloc_get_freelist(cur->bc_tp, cur->bc_private.a.agbp,
-			&rbno)))
+	error = xfs_alloc_get_freelist(cur->bc_tp,
+					 cur->bc_private.a.agbp, &rbno, 1);
+	if (error)
 		return error;
 	if (rbno == NULLAGBLOCK) {
 		*stat = 0;
diff --git a/fs/xfs/xfs_bit.c b/fs/xfs/xfs_bit.c
index 1afe07f..fab0b6d 100644
--- a/fs/xfs/xfs_bit.c
+++ b/fs/xfs/xfs_bit.c
@@ -66,44 +66,6 @@ static const char xfs_highbit[256] = {
 #endif
 
 /*
- * Count of bits set in byte, 0..8.
- */
-static const char xfs_countbit[256] = {
-	0, 1, 1, 2, 1, 2, 2, 3,			/* 00 .. 07 */
-	1, 2, 2, 3, 2, 3, 3, 4,			/* 08 .. 0f */
-	1, 2, 2, 3, 2, 3, 3, 4,			/* 10 .. 17 */
-	2, 3, 3, 4, 3, 4, 4, 5,			/* 18 .. 1f */
-	1, 2, 2, 3, 2, 3, 3, 4,			/* 20 .. 27 */
-	2, 3, 3, 4, 3, 4, 4, 5,			/* 28 .. 2f */
-	2, 3, 3, 4, 3, 4, 4, 5,			/* 30 .. 37 */
-	3, 4, 4, 5, 4, 5, 5, 6,			/* 38 .. 3f */
-	1, 2, 2, 3, 2, 3, 3, 4,			/* 40 .. 47 */
-	2, 3, 3, 4, 3, 4, 4, 5,			/* 48 .. 4f */
-	2, 3, 3, 4, 3, 4, 4, 5,			/* 50 .. 57 */
-	3, 4, 4, 5, 4, 5, 5, 6,			/* 58 .. 5f */
-	2, 3, 3, 4, 3, 4, 4, 5,			/* 60 .. 67 */
-	3, 4, 4, 5, 4, 5, 5, 6,			/* 68 .. 6f */
-	3, 4, 4, 5, 4, 5, 5, 6,			/* 70 .. 77 */
-	4, 5, 5, 6, 5, 6, 6, 7,			/* 78 .. 7f */
-	1, 2, 2, 3, 2, 3, 3, 4,			/* 80 .. 87 */
-	2, 3, 3, 4, 3, 4, 4, 5,			/* 88 .. 8f */
-	2, 3, 3, 4, 3, 4, 4, 5,			/* 90 .. 97 */
-	3, 4, 4, 5, 4, 5, 5, 6,			/* 98 .. 9f */
-	2, 3, 3, 4, 3, 4, 4, 5,			/* a0 .. a7 */
-	3, 4, 4, 5, 4, 5, 5, 6,			/* a8 .. af */
-	3, 4, 4, 5, 4, 5, 5, 6,			/* b0 .. b7 */
-	4, 5, 5, 6, 5, 6, 6, 7,			/* b8 .. bf */
-	2, 3, 3, 4, 3, 4, 4, 5,			/* c0 .. c7 */
-	3, 4, 4, 5, 4, 5, 5, 6,			/* c8 .. cf */
-	3, 4, 4, 5, 4, 5, 5, 6,			/* d0 .. d7 */
-	4, 5, 5, 6, 5, 6, 6, 7,			/* d8 .. df */
-	3, 4, 4, 5, 4, 5, 5, 6,			/* e0 .. e7 */
-	4, 5, 5, 6, 5, 6, 6, 7,			/* e8 .. ef */
-	4, 5, 5, 6, 5, 6, 6, 7,			/* f0 .. f7 */
-	5, 6, 6, 7, 6, 7, 7, 8,			/* f8 .. ff */
-};
-
-/*
  * xfs_highbit32: get high bit set out of 32-bit argument, -1 if none set.
  */
 inline int
@@ -167,56 +129,21 @@ xfs_highbit64(
 
 
 /*
- * Count the number of bits set in the bitmap starting with bit
- * start_bit.  Size is the size of the bitmap in words.
- *
- * Do the counting by mapping a byte value to the number of set
- * bits for that value using the xfs_countbit array, i.e.
- * xfs_countbit[0] == 0, xfs_countbit[1] == 1, xfs_countbit[2] == 1,
- * xfs_countbit[3] == 2, etc.
+ * Return whether bitmap is empty.
+ * Size is number of words in the bitmap, which is padded to word boundary
+ * Returns 1 for empty, 0 for non-empty.
  */
 int
-xfs_count_bits(uint *map, uint size, uint start_bit)
+xfs_bitmap_empty(uint *map, uint size)
 {
-	register int	bits;
-	register unsigned char	*bytep;
-	register unsigned char	*end_map;
-	int		byte_bit;
-
-	bits = 0;
-	end_map = (char*)(map + size);
-	bytep = (char*)(map + (start_bit & ~0x7));
-	byte_bit = start_bit & 0x7;
-
-	/*
-	 * If the caller fell off the end of the map, return 0.
-	 */
-	if (bytep >= end_map) {
-		return (0);
-	}
-
-	/*
-	 * If start_bit is not byte aligned, then process the
-	 * first byte separately.
-	 */
-	if (byte_bit != 0) {
-		/*
-		 * Shift off the bits we don't want to look at,
-		 * before indexing into xfs_countbit.
-		 */
-		bits += xfs_countbit[(*bytep >> byte_bit)];
-		bytep++;
-	}
+	uint i;
+	uint ret = 0;
 
-	/*
-	 * Count the bits in each byte until the end of the bitmap.
-	 */
-	while (bytep < end_map) {
-		bits += xfs_countbit[*bytep];
-		bytep++;
+	for (i = 0; i < size; i++) {
+		ret |= map[i];
 	}
 
-	return (bits);
+	return (ret == 0);
 }
 
 /*
diff --git a/fs/xfs/xfs_bit.h b/fs/xfs/xfs_bit.h
index 0bbe568..082641a 100644
--- a/fs/xfs/xfs_bit.h
+++ b/fs/xfs/xfs_bit.h
@@ -55,8 +55,8 @@ extern int xfs_lowbit64(__uint64_t v);
 /* Get high bit set out of 64-bit argument, -1 if none set */
 extern int xfs_highbit64(__uint64_t);
 
-/* Count set bits in map starting with start_bit */
-extern int xfs_count_bits(uint *map, uint size, uint start_bit);
+/* Return whether bitmap is empty (1 == empty) */
+extern int xfs_bitmap_empty(uint *map, uint size);
 
 /* Count continuous one bits in map starting with start_bit */
 extern int xfs_contig_bits(uint *map, uint size, uint start_bit);
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index b1ea26e..94b5c5f 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -52,6 +52,7 @@
 #include "xfs_quota.h"
 #include "xfs_trans_space.h"
 #include "xfs_buf_item.h"
+#include "xfs_filestream.h"
 
 
 #ifdef DEBUG
@@ -277,7 +278,7 @@ xfs_bmap_isaeof(
 STATIC void
 xfs_bmap_trace_addentry(
 	int		opcode,		/* operation */
-	char		*fname,		/* function name */
+	const char	*fname,		/* function name */
 	char		*desc,		/* operation description */
 	xfs_inode_t	*ip,		/* incore inode pointer */
 	xfs_extnum_t	idx,		/* index of entry(ies) */
@@ -291,7 +292,7 @@ xfs_bmap_trace_addentry(
  */
 STATIC void
 xfs_bmap_trace_delete(
-	char		*fname,		/* function name */
+	const char	*fname,		/* function name */
 	char		*desc,		/* operation description */
 	xfs_inode_t	*ip,		/* incore inode pointer */
 	xfs_extnum_t	idx,		/* index of entry(entries) deleted */
@@ -304,7 +305,7 @@ xfs_bmap_trace_delete(
  */
 STATIC void
 xfs_bmap_trace_insert(
-	char		*fname,		/* function name */
+	const char	*fname,		/* function name */
 	char		*desc,		/* operation description */
 	xfs_inode_t	*ip,		/* incore inode pointer */
 	xfs_extnum_t	idx,		/* index of entry(entries) inserted */
@@ -318,7 +319,7 @@ xfs_bmap_trace_insert(
  */
 STATIC void
 xfs_bmap_trace_post_update(
-	char		*fname,		/* function name */
+	const char	*fname,		/* function name */
 	char		*desc,		/* operation description */
 	xfs_inode_t	*ip,		/* incore inode pointer */
 	xfs_extnum_t	idx,		/* index of entry updated */
@@ -329,17 +330,25 @@ xfs_bmap_trace_post_update(
  */
 STATIC void
 xfs_bmap_trace_pre_update(
-	char		*fname,		/* function name */
+	const char	*fname,		/* function name */
 	char		*desc,		/* operation description */
 	xfs_inode_t	*ip,		/* incore inode pointer */
 	xfs_extnum_t	idx,		/* index of entry to be updated */
 	int		whichfork);	/* data or attr fork */
 
+#define	XFS_BMAP_TRACE_DELETE(d,ip,i,c,w)	\
+	xfs_bmap_trace_delete(__FUNCTION__,d,ip,i,c,w)
+#define	XFS_BMAP_TRACE_INSERT(d,ip,i,c,r1,r2,w)	\
+	xfs_bmap_trace_insert(__FUNCTION__,d,ip,i,c,r1,r2,w)
+#define	XFS_BMAP_TRACE_POST_UPDATE(d,ip,i,w)	\
+	xfs_bmap_trace_post_update(__FUNCTION__,d,ip,i,w)
+#define	XFS_BMAP_TRACE_PRE_UPDATE(d,ip,i,w)	\
+	xfs_bmap_trace_pre_update(__FUNCTION__,d,ip,i,w)
 #else
-#define	xfs_bmap_trace_delete(f,d,ip,i,c,w)
-#define	xfs_bmap_trace_insert(f,d,ip,i,c,r1,r2,w)
-#define	xfs_bmap_trace_post_update(f,d,ip,i,w)
-#define	xfs_bmap_trace_pre_update(f,d,ip,i,w)
+#define	XFS_BMAP_TRACE_DELETE(d,ip,i,c,w)
+#define	XFS_BMAP_TRACE_INSERT(d,ip,i,c,r1,r2,w)
+#define	XFS_BMAP_TRACE_POST_UPDATE(d,ip,i,w)
+#define	XFS_BMAP_TRACE_PRE_UPDATE(d,ip,i,w)
 #endif	/* XFS_BMAP_TRACE */
 
 /*
@@ -531,9 +540,6 @@ xfs_bmap_add_extent(
 	xfs_filblks_t		da_new; /* new count del alloc blocks used */
 	xfs_filblks_t		da_old; /* old count del alloc blocks used */
 	int			error;	/* error return value */
-#ifdef XFS_BMAP_TRACE
-	static char		fname[] = "xfs_bmap_add_extent";
-#endif
 	xfs_ifork_t		*ifp;	/* inode fork ptr */
 	int			logflags; /* returned value */
 	xfs_extnum_t		nextents; /* number of extents in file now */
@@ -551,8 +557,8 @@ xfs_bmap_add_extent(
 	 * already extents in the list.
 	 */
 	if (nextents == 0) {
-		xfs_bmap_trace_insert(fname, "insert empty", ip, 0, 1, new,
-			NULL, whichfork);
+		XFS_BMAP_TRACE_INSERT("insert empty", ip, 0, 1, new, NULL,
+			whichfork);
 		xfs_iext_insert(ifp, 0, 1, new);
 		ASSERT(cur == NULL);
 		ifp->if_lastex = 0;
@@ -710,9 +716,6 @@ xfs_bmap_add_extent_delay_real(
 	int			diff;	/* temp value */
 	xfs_bmbt_rec_t		*ep;	/* extent entry for idx */
 	int			error;	/* error return value */
-#ifdef XFS_BMAP_TRACE
-	static char		fname[] = "xfs_bmap_add_extent_delay_real";
-#endif
 	int			i;	/* temp state */
 	xfs_ifork_t		*ifp;	/* inode fork pointer */
 	xfs_fileoff_t		new_endoff;	/* end offset of new entry */
@@ -808,15 +811,14 @@ xfs_bmap_add_extent_delay_real(
 		 * Filling in all of a previously delayed allocation extent.
 		 * The left and right neighbors are both contiguous with new.
 		 */
-		xfs_bmap_trace_pre_update(fname, "LF|RF|LC|RC", ip, idx - 1,
+		XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|LC|RC", ip, idx - 1,
 			XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
 			LEFT.br_blockcount + PREV.br_blockcount +
 			RIGHT.br_blockcount);
-		xfs_bmap_trace_post_update(fname, "LF|RF|LC|RC", ip, idx - 1,
-			XFS_DATA_FORK);
-		xfs_bmap_trace_delete(fname, "LF|RF|LC|RC", ip, idx, 2,
+		XFS_BMAP_TRACE_POST_UPDATE("LF|RF|LC|RC", ip, idx - 1,
 			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_DELETE("LF|RF|LC|RC", ip, idx, 2, XFS_DATA_FORK);
 		xfs_iext_remove(ifp, idx, 2);
 		ip->i_df.if_lastex = idx - 1;
 		ip->i_d.di_nextents--;
@@ -855,15 +857,14 @@ xfs_bmap_add_extent_delay_real(
 		 * Filling in all of a previously delayed allocation extent.
 		 * The left neighbor is contiguous, the right is not.
 		 */
-		xfs_bmap_trace_pre_update(fname, "LF|RF|LC", ip, idx - 1,
+		XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|LC", ip, idx - 1,
 			XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
 			LEFT.br_blockcount + PREV.br_blockcount);
-		xfs_bmap_trace_post_update(fname, "LF|RF|LC", ip, idx - 1,
+		XFS_BMAP_TRACE_POST_UPDATE("LF|RF|LC", ip, idx - 1,
 			XFS_DATA_FORK);
 		ip->i_df.if_lastex = idx - 1;
-		xfs_bmap_trace_delete(fname, "LF|RF|LC", ip, idx, 1,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_DELETE("LF|RF|LC", ip, idx, 1, XFS_DATA_FORK);
 		xfs_iext_remove(ifp, idx, 1);
 		if (cur == NULL)
 			rval = XFS_ILOG_DEXT;
@@ -892,16 +893,13 @@ xfs_bmap_add_extent_delay_real(
 		 * Filling in all of a previously delayed allocation extent.
 		 * The right neighbor is contiguous, the left is not.
 		 */
-		xfs_bmap_trace_pre_update(fname, "LF|RF|RC", ip, idx,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|RC", ip, idx, XFS_DATA_FORK);
 		xfs_bmbt_set_startblock(ep, new->br_startblock);
 		xfs_bmbt_set_blockcount(ep,
 			PREV.br_blockcount + RIGHT.br_blockcount);
-		xfs_bmap_trace_post_update(fname, "LF|RF|RC", ip, idx,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_POST_UPDATE("LF|RF|RC", ip, idx, XFS_DATA_FORK);
 		ip->i_df.if_lastex = idx;
-		xfs_bmap_trace_delete(fname, "LF|RF|RC", ip, idx + 1, 1,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_DELETE("LF|RF|RC", ip, idx + 1, 1, XFS_DATA_FORK);
 		xfs_iext_remove(ifp, idx + 1, 1);
 		if (cur == NULL)
 			rval = XFS_ILOG_DEXT;
@@ -931,11 +929,9 @@ xfs_bmap_add_extent_delay_real(
 		 * Neither the left nor right neighbors are contiguous with
 		 * the new one.
 		 */
-		xfs_bmap_trace_pre_update(fname, "LF|RF", ip, idx,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_PRE_UPDATE("LF|RF", ip, idx, XFS_DATA_FORK);
 		xfs_bmbt_set_startblock(ep, new->br_startblock);
-		xfs_bmap_trace_post_update(fname, "LF|RF", ip, idx,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_POST_UPDATE("LF|RF", ip, idx, XFS_DATA_FORK);
 		ip->i_df.if_lastex = idx;
 		ip->i_d.di_nextents++;
 		if (cur == NULL)
@@ -963,17 +959,14 @@ xfs_bmap_add_extent_delay_real(
 		 * Filling in the first part of a previous delayed allocation.
 		 * The left neighbor is contiguous.
 		 */
-		xfs_bmap_trace_pre_update(fname, "LF|LC", ip, idx - 1,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_PRE_UPDATE("LF|LC", ip, idx - 1, XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
 			LEFT.br_blockcount + new->br_blockcount);
 		xfs_bmbt_set_startoff(ep,
 			PREV.br_startoff + new->br_blockcount);
-		xfs_bmap_trace_post_update(fname, "LF|LC", ip, idx - 1,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_POST_UPDATE("LF|LC", ip, idx - 1, XFS_DATA_FORK);
 		temp = PREV.br_blockcount - new->br_blockcount;
-		xfs_bmap_trace_pre_update(fname, "LF|LC", ip, idx,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_PRE_UPDATE("LF|LC", ip, idx, XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(ep, temp);
 		ip->i_df.if_lastex = idx - 1;
 		if (cur == NULL)
@@ -995,8 +988,7 @@ xfs_bmap_add_extent_delay_real(
 		temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
 			STARTBLOCKVAL(PREV.br_startblock));
 		xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
-		xfs_bmap_trace_post_update(fname, "LF|LC", ip, idx,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_POST_UPDATE("LF|LC", ip, idx, XFS_DATA_FORK);
 		*dnew = temp;
 		/* DELTA: The boundary between two in-core extents moved. */
 		temp = LEFT.br_startoff;
@@ -1009,11 +1001,11 @@ xfs_bmap_add_extent_delay_real(
 		 * Filling in the first part of a previous delayed allocation.
 		 * The left neighbor is not contiguous.
 		 */
-		xfs_bmap_trace_pre_update(fname, "LF", ip, idx, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_PRE_UPDATE("LF", ip, idx, XFS_DATA_FORK);
 		xfs_bmbt_set_startoff(ep, new_endoff);
 		temp = PREV.br_blockcount - new->br_blockcount;
 		xfs_bmbt_set_blockcount(ep, temp);
-		xfs_bmap_trace_insert(fname, "LF", ip, idx, 1, new, NULL,
+		XFS_BMAP_TRACE_INSERT("LF", ip, idx, 1, new, NULL,
 			XFS_DATA_FORK);
 		xfs_iext_insert(ifp, idx, 1, new);
 		ip->i_df.if_lastex = idx;
@@ -1046,8 +1038,7 @@ xfs_bmap_add_extent_delay_real(
 			(cur ? cur->bc_private.b.allocated : 0));
 		ep = xfs_iext_get_ext(ifp, idx + 1);
 		xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
-		xfs_bmap_trace_post_update(fname, "LF", ip, idx + 1,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_POST_UPDATE("LF", ip, idx + 1, XFS_DATA_FORK);
 		*dnew = temp;
 		/* DELTA: One in-core extent is split in two. */
 		temp = PREV.br_startoff;
@@ -1060,17 +1051,14 @@ xfs_bmap_add_extent_delay_real(
 		 * The right neighbor is contiguous with the new allocation.
 		 */
 		temp = PREV.br_blockcount - new->br_blockcount;
-		xfs_bmap_trace_pre_update(fname, "RF|RC", ip, idx,
-			XFS_DATA_FORK);
-		xfs_bmap_trace_pre_update(fname, "RF|RC", ip, idx + 1,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_PRE_UPDATE("RF|RC", ip, idx, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_PRE_UPDATE("RF|RC", ip, idx + 1, XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(ep, temp);
 		xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, idx + 1),
 			new->br_startoff, new->br_startblock,
 			new->br_blockcount + RIGHT.br_blockcount,
 			RIGHT.br_state);
-		xfs_bmap_trace_post_update(fname, "RF|RC", ip, idx + 1,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_POST_UPDATE("RF|RC", ip, idx + 1, XFS_DATA_FORK);
 		ip->i_df.if_lastex = idx + 1;
 		if (cur == NULL)
 			rval = XFS_ILOG_DEXT;
@@ -1091,8 +1079,7 @@ xfs_bmap_add_extent_delay_real(
 		temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
 			STARTBLOCKVAL(PREV.br_startblock));
 		xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
-		xfs_bmap_trace_post_update(fname, "RF|RC", ip, idx,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_POST_UPDATE("RF|RC", ip, idx, XFS_DATA_FORK);
 		*dnew = temp;
 		/* DELTA: The boundary between two in-core extents moved. */
 		temp = PREV.br_startoff;
@@ -1106,10 +1093,10 @@ xfs_bmap_add_extent_delay_real(
 		 * The right neighbor is not contiguous.
 		 */
 		temp = PREV.br_blockcount - new->br_blockcount;
-		xfs_bmap_trace_pre_update(fname, "RF", ip, idx, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_PRE_UPDATE("RF", ip, idx, XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(ep, temp);
-		xfs_bmap_trace_insert(fname, "RF", ip, idx + 1, 1,
-			new, NULL, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_INSERT("RF", ip, idx + 1, 1, new, NULL,
+			XFS_DATA_FORK);
 		xfs_iext_insert(ifp, idx + 1, 1, new);
 		ip->i_df.if_lastex = idx + 1;
 		ip->i_d.di_nextents++;
@@ -1141,7 +1128,7 @@ xfs_bmap_add_extent_delay_real(
 			(cur ? cur->bc_private.b.allocated : 0));
 		ep = xfs_iext_get_ext(ifp, idx);
 		xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
-		xfs_bmap_trace_post_update(fname, "RF", ip, idx, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_POST_UPDATE("RF", ip, idx, XFS_DATA_FORK);
 		*dnew = temp;
 		/* DELTA: One in-core extent is split in two. */
 		temp = PREV.br_startoff;
@@ -1155,7 +1142,7 @@ xfs_bmap_add_extent_delay_real(
 		 * This case is avoided almost all the time.
 		 */
 		temp = new->br_startoff - PREV.br_startoff;
-		xfs_bmap_trace_pre_update(fname, "0", ip, idx, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_PRE_UPDATE("0", ip, idx, XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(ep, temp);
 		r[0] = *new;
 		r[1].br_state = PREV.br_state;
@@ -1163,7 +1150,7 @@ xfs_bmap_add_extent_delay_real(
 		r[1].br_startoff = new_endoff;
 		temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff;
 		r[1].br_blockcount = temp2;
-		xfs_bmap_trace_insert(fname, "0", ip, idx + 1, 2, &r[0], &r[1],
+		XFS_BMAP_TRACE_INSERT("0", ip, idx + 1, 2, &r[0], &r[1],
 			XFS_DATA_FORK);
 		xfs_iext_insert(ifp, idx + 1, 2, &r[0]);
 		ip->i_df.if_lastex = idx + 1;
@@ -1222,13 +1209,11 @@ xfs_bmap_add_extent_delay_real(
 		}
 		ep = xfs_iext_get_ext(ifp, idx);
 		xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
-		xfs_bmap_trace_post_update(fname, "0", ip, idx, XFS_DATA_FORK);
-		xfs_bmap_trace_pre_update(fname, "0", ip, idx + 2,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_POST_UPDATE("0", ip, idx, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_PRE_UPDATE("0", ip, idx + 2, XFS_DATA_FORK);
 		xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx + 2),
 			NULLSTARTBLOCK((int)temp2));
-		xfs_bmap_trace_post_update(fname, "0", ip, idx + 2,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_POST_UPDATE("0", ip, idx + 2, XFS_DATA_FORK);
 		*dnew = temp + temp2;
 		/* DELTA: One in-core extent is split in three. */
 		temp = PREV.br_startoff;
@@ -1287,9 +1272,6 @@ xfs_bmap_add_extent_unwritten_real(
 	xfs_btree_cur_t		*cur;	/* btree cursor */
 	xfs_bmbt_rec_t		*ep;	/* extent entry for idx */
 	int			error;	/* error return value */
-#ifdef XFS_BMAP_TRACE
-	static char		fname[] = "xfs_bmap_add_extent_unwritten_real";
-#endif
 	int			i;	/* temp state */
 	xfs_ifork_t		*ifp;	/* inode fork pointer */
 	xfs_fileoff_t		new_endoff;	/* end offset of new entry */
@@ -1390,15 +1372,14 @@ xfs_bmap_add_extent_unwritten_real(
 		 * Setting all of a previous oldext extent to newext.
 		 * The left and right neighbors are both contiguous with new.
 		 */
-		xfs_bmap_trace_pre_update(fname, "LF|RF|LC|RC", ip, idx - 1,
+		XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|LC|RC", ip, idx - 1,
 			XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
 			LEFT.br_blockcount + PREV.br_blockcount +
 			RIGHT.br_blockcount);
-		xfs_bmap_trace_post_update(fname, "LF|RF|LC|RC", ip, idx - 1,
-			XFS_DATA_FORK);
-		xfs_bmap_trace_delete(fname, "LF|RF|LC|RC", ip, idx, 2,
+		XFS_BMAP_TRACE_POST_UPDATE("LF|RF|LC|RC", ip, idx - 1,
 			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_DELETE("LF|RF|LC|RC", ip, idx, 2, XFS_DATA_FORK);
 		xfs_iext_remove(ifp, idx, 2);
 		ip->i_df.if_lastex = idx - 1;
 		ip->i_d.di_nextents -= 2;
@@ -1441,15 +1422,14 @@ xfs_bmap_add_extent_unwritten_real(
 		 * Setting all of a previous oldext extent to newext.
 		 * The left neighbor is contiguous, the right is not.
 		 */
-		xfs_bmap_trace_pre_update(fname, "LF|RF|LC", ip, idx - 1,
+		XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|LC", ip, idx - 1,
 			XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
 			LEFT.br_blockcount + PREV.br_blockcount);
-		xfs_bmap_trace_post_update(fname, "LF|RF|LC", ip, idx - 1,
+		XFS_BMAP_TRACE_POST_UPDATE("LF|RF|LC", ip, idx - 1,
 			XFS_DATA_FORK);
 		ip->i_df.if_lastex = idx - 1;
-		xfs_bmap_trace_delete(fname, "LF|RF|LC", ip, idx, 1,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_DELETE("LF|RF|LC", ip, idx, 1, XFS_DATA_FORK);
 		xfs_iext_remove(ifp, idx, 1);
 		ip->i_d.di_nextents--;
 		if (cur == NULL)
@@ -1484,16 +1464,15 @@ xfs_bmap_add_extent_unwritten_real(
 		 * Setting all of a previous oldext extent to newext.
 		 * The right neighbor is contiguous, the left is not.
 		 */
-		xfs_bmap_trace_pre_update(fname, "LF|RF|RC", ip, idx,
+		XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|RC", ip, idx,
 			XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(ep,
 			PREV.br_blockcount + RIGHT.br_blockcount);
 		xfs_bmbt_set_state(ep, newext);
-		xfs_bmap_trace_post_update(fname, "LF|RF|RC", ip, idx,
+		XFS_BMAP_TRACE_POST_UPDATE("LF|RF|RC", ip, idx,
 			XFS_DATA_FORK);
 		ip->i_df.if_lastex = idx;
-		xfs_bmap_trace_delete(fname, "LF|RF|RC", ip, idx + 1, 1,
-			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_DELETE("LF|RF|RC", ip, idx + 1, 1, XFS_DATA_FORK);
 		xfs_iext_remove(ifp, idx + 1, 1);
 		ip->i_d.di_nextents--;
 		if (cur == NULL)
@@ -1529,10 +1508,10 @@ xfs_bmap_add_extent_unwritten_real(
 		 * Neither the left nor right neighbors are contiguous with
 		 * the new one.
 		 */
-		xfs_bmap_trace_pre_update(fname, "LF|RF", ip, idx,
+		XFS_BMAP_TRACE_PRE_UPDATE("LF|RF", ip, idx,
 			XFS_DATA_FORK);
 		xfs_bmbt_set_state(ep, newext);
-		xfs_bmap_trace_post_update(fname, "LF|RF", ip, idx,
+		XFS_BMAP_TRACE_POST_UPDATE("LF|RF", ip, idx,
 			XFS_DATA_FORK);
 		ip->i_df.if_lastex = idx;
 		if (cur == NULL)
@@ -1559,21 +1538,21 @@ xfs_bmap_add_extent_unwritten_real(
 		 * Setting the first part of a previous oldext extent to newext.
 		 * The left neighbor is contiguous.
 		 */
-		xfs_bmap_trace_pre_update(fname, "LF|LC", ip, idx - 1,
+		XFS_BMAP_TRACE_PRE_UPDATE("LF|LC", ip, idx - 1,
 			XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
 			LEFT.br_blockcount + new->br_blockcount);
 		xfs_bmbt_set_startoff(ep,
 			PREV.br_startoff + new->br_blockcount);
-		xfs_bmap_trace_post_update(fname, "LF|LC", ip, idx - 1,
+		XFS_BMAP_TRACE_POST_UPDATE("LF|LC", ip, idx - 1,
 			XFS_DATA_FORK);
-		xfs_bmap_trace_pre_update(fname, "LF|LC", ip, idx,
+		XFS_BMAP_TRACE_PRE_UPDATE("LF|LC", ip, idx,
 			XFS_DATA_FORK);
 		xfs_bmbt_set_startblock(ep,
 			new->br_startblock + new->br_blockcount);
 		xfs_bmbt_set_blockcount(ep,
 			PREV.br_blockcount - new->br_blockcount);
-		xfs_bmap_trace_post_update(fname, "LF|LC", ip, idx,
+		XFS_BMAP_TRACE_POST_UPDATE("LF|LC", ip, idx,
 			XFS_DATA_FORK);
 		ip->i_df.if_lastex = idx - 1;
 		if (cur == NULL)
@@ -1610,15 +1589,15 @@ xfs_bmap_add_extent_unwritten_real(
 		 * Setting the first part of a previous oldext extent to newext.
 		 * The left neighbor is not contiguous.
 		 */
-		xfs_bmap_trace_pre_update(fname, "LF", ip, idx, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_PRE_UPDATE("LF", ip, idx, XFS_DATA_FORK);
 		ASSERT(ep && xfs_bmbt_get_state(ep) == oldext);
 		xfs_bmbt_set_startoff(ep, new_endoff);
 		xfs_bmbt_set_blockcount(ep,
 			PREV.br_blockcount - new->br_blockcount);
 		xfs_bmbt_set_startblock(ep,
 			new->br_startblock + new->br_blockcount);
-		xfs_bmap_trace_post_update(fname, "LF", ip, idx, XFS_DATA_FORK);
-		xfs_bmap_trace_insert(fname, "LF", ip, idx, 1, new, NULL,
+		XFS_BMAP_TRACE_POST_UPDATE("LF", ip, idx, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_INSERT("LF", ip, idx, 1, new, NULL,
 			XFS_DATA_FORK);
 		xfs_iext_insert(ifp, idx, 1, new);
 		ip->i_df.if_lastex = idx;
@@ -1653,18 +1632,18 @@ xfs_bmap_add_extent_unwritten_real(
 		 * Setting the last part of a previous oldext extent to newext.
 		 * The right neighbor is contiguous with the new allocation.
 		 */
-		xfs_bmap_trace_pre_update(fname, "RF|RC", ip, idx,
+		XFS_BMAP_TRACE_PRE_UPDATE("RF|RC", ip, idx,
 			XFS_DATA_FORK);
-		xfs_bmap_trace_pre_update(fname, "RF|RC", ip, idx + 1,
+		XFS_BMAP_TRACE_PRE_UPDATE("RF|RC", ip, idx + 1,
 			XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(ep,
 			PREV.br_blockcount - new->br_blockcount);
-		xfs_bmap_trace_post_update(fname, "RF|RC", ip, idx,
+		XFS_BMAP_TRACE_POST_UPDATE("RF|RC", ip, idx,
 			XFS_DATA_FORK);
 		xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, idx + 1),
 			new->br_startoff, new->br_startblock,
 			new->br_blockcount + RIGHT.br_blockcount, newext);
-		xfs_bmap_trace_post_update(fname, "RF|RC", ip, idx + 1,
+		XFS_BMAP_TRACE_POST_UPDATE("RF|RC", ip, idx + 1,
 			XFS_DATA_FORK);
 		ip->i_df.if_lastex = idx + 1;
 		if (cur == NULL)
@@ -1700,12 +1679,12 @@ xfs_bmap_add_extent_unwritten_real(
 		 * Setting the last part of a previous oldext extent to newext.
 		 * The right neighbor is not contiguous.
 		 */
-		xfs_bmap_trace_pre_update(fname, "RF", ip, idx, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_PRE_UPDATE("RF", ip, idx, XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(ep,
 			PREV.br_blockcount - new->br_blockcount);
-		xfs_bmap_trace_post_update(fname, "RF", ip, idx, XFS_DATA_FORK);
-		xfs_bmap_trace_insert(fname, "RF", ip, idx + 1, 1,
-			new, NULL, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_POST_UPDATE("RF", ip, idx, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_INSERT("RF", ip, idx + 1, 1, new, NULL,
+			XFS_DATA_FORK);
 		xfs_iext_insert(ifp, idx + 1, 1, new);
 		ip->i_df.if_lastex = idx + 1;
 		ip->i_d.di_nextents++;
@@ -1744,17 +1723,17 @@ xfs_bmap_add_extent_unwritten_real(
 		 * newext.  Contiguity is impossible here.
 		 * One extent becomes three extents.
 		 */
-		xfs_bmap_trace_pre_update(fname, "0", ip, idx, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_PRE_UPDATE("0", ip, idx, XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(ep,
 			new->br_startoff - PREV.br_startoff);
-		xfs_bmap_trace_post_update(fname, "0", ip, idx, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_POST_UPDATE("0", ip, idx, XFS_DATA_FORK);
 		r[0] = *new;
 		r[1].br_startoff = new_endoff;
 		r[1].br_blockcount =
 			PREV.br_startoff + PREV.br_blockcount - new_endoff;
 		r[1].br_startblock = new->br_startblock + new->br_blockcount;
 		r[1].br_state = oldext;
-		xfs_bmap_trace_insert(fname, "0", ip, idx + 1, 2, &r[0], &r[1],
+		XFS_BMAP_TRACE_INSERT("0", ip, idx + 1, 2, &r[0], &r[1],
 			XFS_DATA_FORK);
 		xfs_iext_insert(ifp, idx + 1, 2, &r[0]);
 		ip->i_df.if_lastex = idx + 1;
@@ -1845,9 +1824,6 @@ xfs_bmap_add_extent_hole_delay(
 	int			rsvd)		/* OK to allocate reserved blocks */
 {
 	xfs_bmbt_rec_t		*ep;	/* extent record for idx */
-#ifdef XFS_BMAP_TRACE
-	static char		fname[] = "xfs_bmap_add_extent_hole_delay";
-#endif
 	xfs_ifork_t		*ifp;	/* inode fork pointer */
 	xfs_bmbt_irec_t		left;	/* left neighbor extent entry */
 	xfs_filblks_t		newlen=0;	/* new indirect size */
@@ -1919,7 +1895,7 @@ xfs_bmap_add_extent_hole_delay(
 		 */
 		temp = left.br_blockcount + new->br_blockcount +
 			right.br_blockcount;
-		xfs_bmap_trace_pre_update(fname, "LC|RC", ip, idx - 1,
+		XFS_BMAP_TRACE_PRE_UPDATE("LC|RC", ip, idx - 1,
 			XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), temp);
 		oldlen = STARTBLOCKVAL(left.br_startblock) +
@@ -1928,10 +1904,9 @@ xfs_bmap_add_extent_hole_delay(
 		newlen = xfs_bmap_worst_indlen(ip, temp);
 		xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx - 1),
 			NULLSTARTBLOCK((int)newlen));
-		xfs_bmap_trace_post_update(fname, "LC|RC", ip, idx - 1,
-			XFS_DATA_FORK);
-		xfs_bmap_trace_delete(fname, "LC|RC", ip, idx, 1,
+		XFS_BMAP_TRACE_POST_UPDATE("LC|RC", ip, idx - 1,
 			XFS_DATA_FORK);
+		XFS_BMAP_TRACE_DELETE("LC|RC", ip, idx, 1, XFS_DATA_FORK);
 		xfs_iext_remove(ifp, idx, 1);
 		ip->i_df.if_lastex = idx - 1;
 		/* DELTA: Two in-core extents were replaced by one. */
@@ -1946,7 +1921,7 @@ xfs_bmap_add_extent_hole_delay(
 		 * Merge the new allocation with the left neighbor.
 		 */
 		temp = left.br_blockcount + new->br_blockcount;
-		xfs_bmap_trace_pre_update(fname, "LC", ip, idx - 1,
+		XFS_BMAP_TRACE_PRE_UPDATE("LC", ip, idx - 1,
 			XFS_DATA_FORK);
 		xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), temp);
 		oldlen = STARTBLOCKVAL(left.br_startblock) +
@@ -1954,7 +1929,7 @@ xfs_bmap_add_extent_hole_delay(
 		newlen = xfs_bmap_worst_indlen(ip, temp);
 		xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx - 1),
 			NULLSTARTBLOCK((int)newlen));
-		xfs_bmap_trace_post_update(fname, "LC", ip, idx - 1,
+		XFS_BMAP_TRACE_POST_UPDATE("LC", ip, idx - 1,
 			XFS_DATA_FORK);
 		ip->i_df.if_lastex = idx - 1;
 		/* DELTA: One in-core extent grew into a hole. */
@@ -1968,14 +1943,14 @@ xfs_bmap_add_extent_hole_delay(
 		 * on the right.
 		 * Merge the new allocation with the right neighbor.
 		 */
-		xfs_bmap_trace_pre_update(fname, "RC", ip, idx, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_PRE_UPDATE("RC", ip, idx, XFS_DATA_FORK);
 		temp = new->br_blockcount + right.br_blockcount;
 		oldlen = STARTBLOCKVAL(new->br_startblock) +
 			STARTBLOCKVAL(right.br_startblock);
 		newlen = xfs_bmap_worst_indlen(ip, temp);
 		xfs_bmbt_set_allf(ep, new->br_startoff,
 			NULLSTARTBLOCK((int)newlen), temp, right.br_state);
-		xfs_bmap_trace_post_update(fname, "RC", ip, idx, XFS_DATA_FORK);
+		XFS_BMAP_TRACE_POST_UPDATE("RC", ip, idx, XFS_DATA_FORK);
 		ip->i_df.if_lastex = idx;
 		/* DELTA: One in-core extent grew into a hole. */
 		temp2 = temp;
@@ -1989,7 +1964,7 @@ xfs_bmap_add_extent_hole_delay(
 		 * Insert a new entry.
 		 */
 		oldlen = newlen = 0;
-		xfs_bmap_trace_insert(fname, "0", ip, idx, 1, new, NULL,
+		XFS_BMAP_TRACE_INSERT("0", ip, idx, 1, new, NULL,
 			XFS_DATA_FORK);
 		xfs_iext_insert(ifp, idx, 1, new);
 		ip->i_df.if_lastex = idx;
@@ -2039,9 +2014,6 @@ xfs_bmap_add_extent_hole_real(
 {
 	xfs_bmbt_rec_t		*ep;	/* pointer to extent entry ins. point */
 	int			error;	/* error return value */
-#ifdef XFS_BMAP_TRACE
-	static char		fname[] = "xfs_bmap_add_extent_hole_real";
-#endif
 	int			i;	/* temp state */
 	xfs_ifork_t		*ifp;	/* inode fork pointer */
 	xfs_bmbt_irec_t		left;	/* left neighbor extent entry */
@@ -2118,15 +2090,14 @@ xfs_bmap_add_extent_hole_real(
 		 * left and on the right.
 		 * Merge all three into a single extent record.
 		 */
-		xfs_bmap_trace_pre_update(fname, "LC|RC", ip, idx - 1,
+		XFS_BMAP_TRACE_PRE_UPDATE("LC|RC", ip, idx - 1,
 			whichfork);
 		xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
 			left.br_blockcount + new->br_blockcount +
 			right.br_blockcount);
-		xfs_bmap_trace_post_update(fname, "LC|RC", ip, idx - 1,
+		XFS_BMAP_TRACE_POST_UPDATE("LC|RC", ip, idx - 1,
 			whichfork);
-		xfs_bmap_trace_delete(fname, "LC|RC", ip,
-			idx, 1, whichfork);
+		XFS_BMAP_TRACE_DELETE("LC|RC", ip, idx, 1, whichfork);
 		xfs_iext_remove(ifp, idx, 1);
 		ifp->if_lastex = idx - 1;
 		XFS_IFORK_NEXT_SET(ip, whichfork,
@@ -2168,10 +2139,10 @@ xfs_bmap_add_extent_hole_real(
 		 * on the left.
 		 * Merge the new allocation with the left neighbor.
 		 */
-		xfs_bmap_trace_pre_update(fname, "LC", ip, idx - 1, whichfork);
+		XFS_BMAP_TRACE_PRE_UPDATE("LC", ip, idx - 1, whichfork);
 		xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
 			left.br_blockcount + new->br_blockcount);
-		xfs_bmap_trace_post_update(fname, "LC", ip, idx - 1, whichfork);
+		XFS_BMAP_TRACE_POST_UPDATE("LC", ip, idx - 1, whichfork);
 		ifp->if_lastex = idx - 1;
 		if (cur == NULL) {
 			rval = XFS_ILOG_FEXT(whichfork);
@@ -2202,11 +2173,11 @@ xfs_bmap_add_extent_hole_real(
 		 * on the right.
 		 * Merge the new allocation with the right neighbor.
 		 */
-		xfs_bmap_trace_pre_update(fname, "RC", ip, idx, whichfork);
+		XFS_BMAP_TRACE_PRE_UPDATE("RC", ip, idx, whichfork);
 		xfs_bmbt_set_allf(ep, new->br_startoff, new->br_startblock,
 			new->br_blockcount + right.br_blockcount,
 			right.br_state);
-		xfs_bmap_trace_post_update(fname, "RC", ip, idx, whichfork);
+		XFS_BMAP_TRACE_POST_UPDATE("RC", ip, idx, whichfork);
 		ifp->if_lastex = idx;
 		if (cur == NULL) {
 			rval = XFS_ILOG_FEXT(whichfork);
@@ -2237,8 +2208,7 @@ xfs_bmap_add_extent_hole_real(
 		 * real allocation.
 		 * Insert a new entry.
 		 */
-		xfs_bmap_trace_insert(fname, "0", ip, idx, 1, new, NULL,
-			whichfork);
+		XFS_BMAP_TRACE_INSERT("0", ip, idx, 1, new, NULL, whichfork);
 		xfs_iext_insert(ifp, idx, 1, new);
 		ifp->if_lastex = idx;
 		XFS_IFORK_NEXT_SET(ip, whichfork,
@@ -2605,12 +2575,10 @@ xfs_bmap_rtalloc(
 	xfs_extlen_t	prod = 0;	/* product factor for allocators */
 	xfs_extlen_t	ralen = 0;	/* realtime allocation length */
 	xfs_extlen_t	align;		/* minimum allocation alignment */
-	xfs_rtblock_t	rtx;		/* realtime extent number */
 	xfs_rtblock_t	rtb;
 
 	mp = ap->ip->i_mount;
-	align = ap->ip->i_d.di_extsize ?
-		ap->ip->i_d.di_extsize : mp->m_sb.sb_rextsize;
+	align = xfs_get_extsz_hint(ap->ip);
 	prod = align / mp->m_sb.sb_rextsize;
 	error = xfs_bmap_extsize_align(mp, ap->gotp, ap->prevp,
 					align, 1, ap->eof, 0,
@@ -2644,6 +2612,8 @@ xfs_bmap_rtalloc(
 	 * pick an extent that will space things out in the rt area.
 	 */
 	if (ap->eof && ap->off == 0) {
+		xfs_rtblock_t uninitialized_var(rtx); /* realtime extent no */
+
 		error = xfs_rtpick_extent(mp, ap->tp, ralen, &rtx);
 		if (error)
 			return error;
@@ -2715,9 +2685,7 @@ xfs_bmap_btalloc(
 	int		error;
 
 	mp = ap->ip->i_mount;
-	align = (ap->userdata && ap->ip->i_d.di_extsize &&
-		(ap->ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)) ?
-		ap->ip->i_d.di_extsize : 0;
+	align = ap->userdata ? xfs_get_extsz_hint(ap->ip) : 0;
 	if (unlikely(align)) {
 		error = xfs_bmap_extsize_align(mp, ap->gotp, ap->prevp,
 						align, 0, ap->eof, 0, ap->conv,
@@ -2727,9 +2695,15 @@ xfs_bmap_btalloc(
 	}
 	nullfb = ap->firstblock == NULLFSBLOCK;
 	fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, ap->firstblock);
-	if (nullfb)
-		ap->rval = XFS_INO_TO_FSB(mp, ap->ip->i_ino);
-	else
+	if (nullfb) {
+		if (ap->userdata && xfs_inode_is_filestream(ap->ip)) {
+			ag = xfs_filestream_lookup_ag(ap->ip);
+			ag = (ag != NULLAGNUMBER) ? ag : 0;
+			ap->rval = XFS_AGB_TO_FSB(mp, ag, 0);
+		} else {
+			ap->rval = XFS_INO_TO_FSB(mp, ap->ip->i_ino);
+		}
+	} else
 		ap->rval = ap->firstblock;
 
 	xfs_bmap_adjacent(ap);
@@ -2753,13 +2727,22 @@ xfs_bmap_btalloc(
 	args.firstblock = ap->firstblock;
 	blen = 0;
 	if (nullfb) {
-		args.type = XFS_ALLOCTYPE_START_BNO;
+		if (ap->userdata && xfs_inode_is_filestream(ap->ip))
+			args.type = XFS_ALLOCTYPE_NEAR_BNO;
+		else
+			args.type = XFS_ALLOCTYPE_START_BNO;
 		args.total = ap->total;
+
 		/*
-		 * Find the longest available space.
-		 * We're going to try for the whole allocation at once.
+		 * Search for an allocation group with a single extent
+		 * large enough for the request.
+		 *
+		 * If one isn't found, then adjust the minimum allocation
+		 * size to the largest space found.
 		 */
 		startag = ag = XFS_FSB_TO_AGNO(mp, args.fsbno);
+		if (startag == NULLAGNUMBER)
+			startag = ag = 0;
 		notinit = 0;
 		down_read(&mp->m_peraglock);
 		while (blen < ap->alen) {
@@ -2785,6 +2768,35 @@ xfs_bmap_btalloc(
 					blen = longest;
 			} else
 				notinit = 1;
+
+			if (xfs_inode_is_filestream(ap->ip)) {
+				if (blen >= ap->alen)
+					break;
+
+				if (ap->userdata) {
+					/*
+					 * If startag is an invalid AG, we've
+					 * come here once before and
+					 * xfs_filestream_new_ag picked the
+					 * best currently available.
+					 *
+					 * Don't continue looping, since we
+					 * could loop forever.
+					 */
+					if (startag == NULLAGNUMBER)
+						break;
+
+					error = xfs_filestream_new_ag(ap, &ag);
+					if (error) {
+						up_read(&mp->m_peraglock);
+						return error;
+					}
+
+					/* loop again to set 'blen'*/
+					startag = NULLAGNUMBER;
+					continue;
+				}
+			}
 			if (++ag == mp->m_sb.sb_agcount)
 				ag = 0;
 			if (ag == startag)
@@ -2809,17 +2821,27 @@ xfs_bmap_btalloc(
 		 */
 		else
 			args.minlen = ap->alen;
+
+		/*
+		 * set the failure fallback case to look in the selected
+		 * AG as the stream may have moved.
+		 */
+		if (xfs_inode_is_filestream(ap->ip))
+			ap->rval = args.fsbno = XFS_AGB_TO_FSB(mp, ag, 0);
 	} else if (ap->low) {
-		args.type = XFS_ALLOCTYPE_START_BNO;
+		if (xfs_inode_is_filestream(ap->ip))
+			args.type = XFS_ALLOCTYPE_FIRST_AG;
+		else
+			args.type = XFS_ALLOCTYPE_START_BNO;
 		args.total = args.minlen = ap->minlen;
 	} else {
 		args.type = XFS_ALLOCTYPE_NEAR_BNO;
 		args.total = ap->total;
 		args.minlen = ap->minlen;
 	}
-	if (unlikely(ap->userdata && ap->ip->i_d.di_extsize &&
-		    (ap->ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE))) {
-		args.prod = ap->ip->i_d.di_extsize;
+	/* apply extent size hints if obtained earlier */
+	if (unlikely(align)) {
+		args.prod = align;
 		if ((args.mod = (xfs_extlen_t)do_mod(ap->off, args.prod)))
 			args.mod = (xfs_extlen_t)(args.prod - args.mod);
 	} else if (mp->m_sb.sb_blocksize >= NBPP) {
@@ -3051,9 +3073,6 @@ xfs_bmap_del_extent(
 	xfs_bmbt_rec_t		*ep;	/* current extent entry pointer */
 	int			error;	/* error return value */
 	int			flags;	/* inode logging flags */
-#ifdef XFS_BMAP_TRACE
-	static char		fname[] = "xfs_bmap_del_extent";
-#endif
 	xfs_bmbt_irec_t		got;	/* current extent entry */
 	xfs_fileoff_t		got_endoff;	/* first offset past got */
 	int			i;	/* temp state */
@@ -3147,7 +3166,7 @@ xfs_bmap_del_extent(
 		/*
 		 * Matches the whole extent.  Delete the entry.
 		 */
-		xfs_bmap_trace_delete(fname, "3", ip, idx, 1, whichfork);
+		XFS_BMAP_TRACE_DELETE("3", ip, idx, 1, whichfork);
 		xfs_iext_remove(ifp, idx, 1);
 		ifp->if_lastex = idx;
 		if (delay)
@@ -3168,7 +3187,7 @@ xfs_bmap_del_extent(
 		/*
 		 * Deleting the first part of the extent.
 		 */
-		xfs_bmap_trace_pre_update(fname, "2", ip, idx, whichfork);
+		XFS_BMAP_TRACE_PRE_UPDATE("2", ip, idx, whichfork);
 		xfs_bmbt_set_startoff(ep, del_endoff);
 		temp = got.br_blockcount - del->br_blockcount;
 		xfs_bmbt_set_blockcount(ep, temp);
@@ -3177,13 +3196,13 @@ xfs_bmap_del_extent(
 			temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
 				da_old);
 			xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
-			xfs_bmap_trace_post_update(fname, "2", ip, idx,
+			XFS_BMAP_TRACE_POST_UPDATE("2", ip, idx,
 				whichfork);
 			da_new = temp;
 			break;
 		}
 		xfs_bmbt_set_startblock(ep, del_endblock);
-		xfs_bmap_trace_post_update(fname, "2", ip, idx, whichfork);
+		XFS_BMAP_TRACE_POST_UPDATE("2", ip, idx, whichfork);
 		if (!cur) {
 			flags |= XFS_ILOG_FEXT(whichfork);
 			break;
@@ -3199,19 +3218,19 @@ xfs_bmap_del_extent(
 		 * Deleting the last part of the extent.
 		 */
 		temp = got.br_blockcount - del->br_blockcount;
-		xfs_bmap_trace_pre_update(fname, "1", ip, idx, whichfork);
+		XFS_BMAP_TRACE_PRE_UPDATE("1", ip, idx, whichfork);
 		xfs_bmbt_set_blockcount(ep, temp);
 		ifp->if_lastex = idx;
 		if (delay) {
 			temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
 				da_old);
 			xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
-			xfs_bmap_trace_post_update(fname, "1", ip, idx,
+			XFS_BMAP_TRACE_POST_UPDATE("1", ip, idx,
 				whichfork);
 			da_new = temp;
 			break;
 		}
-		xfs_bmap_trace_post_update(fname, "1", ip, idx, whichfork);
+		XFS_BMAP_TRACE_POST_UPDATE("1", ip, idx, whichfork);
 		if (!cur) {
 			flags |= XFS_ILOG_FEXT(whichfork);
 			break;
@@ -3228,7 +3247,7 @@ xfs_bmap_del_extent(
 		 * Deleting the middle of the extent.
 		 */
 		temp = del->br_startoff - got.br_startoff;
-		xfs_bmap_trace_pre_update(fname, "0", ip, idx, whichfork);
+		XFS_BMAP_TRACE_PRE_UPDATE("0", ip, idx, whichfork);
 		xfs_bmbt_set_blockcount(ep, temp);
 		new.br_startoff = del_endoff;
 		temp2 = got_endoff - del_endoff;
@@ -3315,8 +3334,8 @@ xfs_bmap_del_extent(
 				}
 			}
 		}
-		xfs_bmap_trace_post_update(fname, "0", ip, idx, whichfork);
-		xfs_bmap_trace_insert(fname, "0", ip, idx + 1, 1, &new, NULL,
+		XFS_BMAP_TRACE_POST_UPDATE("0", ip, idx, whichfork);
+		XFS_BMAP_TRACE_INSERT("0", ip, idx + 1, 1, &new, NULL,
 			whichfork);
 		xfs_iext_insert(ifp, idx + 1, 1, &new);
 		ifp->if_lastex = idx + 1;
@@ -3556,9 +3575,6 @@ xfs_bmap_local_to_extents(
 {
 	int		error;		/* error return value */
 	int		flags;		/* logging flags returned */
-#ifdef XFS_BMAP_TRACE
-	static char	fname[] = "xfs_bmap_local_to_extents";
-#endif
 	xfs_ifork_t	*ifp;		/* inode fork pointer */
 
 	/*
@@ -3613,7 +3629,7 @@ xfs_bmap_local_to_extents(
 		xfs_iext_add(ifp, 0, 1);
 		ep = xfs_iext_get_ext(ifp, 0);
 		xfs_bmbt_set_allf(ep, 0, args.fsbno, 1, XFS_EXT_NORM);
-		xfs_bmap_trace_post_update(fname, "new", ip, 0, whichfork);
+		XFS_BMAP_TRACE_POST_UPDATE("new", ip, 0, whichfork);
 		XFS_IFORK_NEXT_SET(ip, whichfork, 1);
 		ip->i_d.di_nblocks = 1;
 		XFS_TRANS_MOD_DQUOT_BYINO(args.mp, tp, ip,
@@ -3736,7 +3752,7 @@ ktrace_t	*xfs_bmap_trace_buf;
 STATIC void
 xfs_bmap_trace_addentry(
 	int		opcode,		/* operation */
-	char		*fname,		/* function name */
+	const char	*fname,		/* function name */
 	char		*desc,		/* operation description */
 	xfs_inode_t	*ip,		/* incore inode pointer */
 	xfs_extnum_t	idx,		/* index of entry(ies) */
@@ -3795,7 +3811,7 @@ xfs_bmap_trace_addentry(
  */
 STATIC void
 xfs_bmap_trace_delete(
-	char		*fname,		/* function name */
+	const char	*fname,		/* function name */
 	char		*desc,		/* operation description */
 	xfs_inode_t	*ip,		/* incore inode pointer */
 	xfs_extnum_t	idx,		/* index of entry(entries) deleted */
@@ -3817,7 +3833,7 @@ xfs_bmap_trace_delete(
  */
 STATIC void
 xfs_bmap_trace_insert(
-	char		*fname,		/* function name */
+	const char	*fname,		/* function name */
 	char		*desc,		/* operation description */
 	xfs_inode_t	*ip,		/* incore inode pointer */
 	xfs_extnum_t	idx,		/* index of entry(entries) inserted */
@@ -3846,7 +3862,7 @@ xfs_bmap_trace_insert(
  */
 STATIC void
 xfs_bmap_trace_post_update(
-	char		*fname,		/* function name */
+	const char	*fname,		/* function name */
 	char		*desc,		/* operation description */
 	xfs_inode_t	*ip,		/* incore inode pointer */
 	xfs_extnum_t	idx,		/* index of entry updated */
@@ -3864,7 +3880,7 @@ xfs_bmap_trace_post_update(
  */
 STATIC void
 xfs_bmap_trace_pre_update(
-	char		*fname,		/* function name */
+	const char	*fname,		/* function name */
 	char		*desc,		/* operation description */
 	xfs_inode_t	*ip,		/* incore inode pointer */
 	xfs_extnum_t	idx,		/* index of entry to be updated */
@@ -4481,9 +4497,6 @@ xfs_bmap_read_extents(
 	xfs_buf_t		*bp;	/* buffer for "block" */
 	int			error;	/* error return value */
 	xfs_exntfmt_t		exntf;	/* XFS_EXTFMT_NOSTATE, if checking */
-#ifdef XFS_BMAP_TRACE
-	static char		fname[] = "xfs_bmap_read_extents";
-#endif
 	xfs_extnum_t		i, j;	/* index into the extents list */
 	xfs_ifork_t		*ifp;	/* fork structure */
 	int			level;	/* btree level, for checking */
@@ -4600,7 +4613,7 @@ xfs_bmap_read_extents(
 	}
 	ASSERT(i == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
 	ASSERT(i == XFS_IFORK_NEXTENTS(ip, whichfork));
-	xfs_bmap_trace_exlist(fname, ip, i, whichfork);
+	XFS_BMAP_TRACE_EXLIST(ip, i, whichfork);
 	return 0;
 error0:
 	xfs_trans_brelse(tp, bp);
@@ -4613,7 +4626,7 @@ error0:
  */
 void
 xfs_bmap_trace_exlist(
-	char		*fname,		/* function name */
+	const char	*fname,		/* function name */
 	xfs_inode_t	*ip,		/* incore inode pointer */
 	xfs_extnum_t	cnt,		/* count of entries in the list */
 	int		whichfork)	/* data or attr fork */
@@ -4628,7 +4641,7 @@ xfs_bmap_trace_exlist(
 	for (idx = 0; idx < cnt; idx++) {
 		ep = xfs_iext_get_ext(ifp, idx);
 		xfs_bmbt_get_all(ep, &s);
-		xfs_bmap_trace_insert(fname, "exlist", ip, idx, 1, &s, NULL,
+		XFS_BMAP_TRACE_INSERT("exlist", ip, idx, 1, &s, NULL,
 			whichfork);
 	}
 }
@@ -4868,12 +4881,7 @@ xfs_bmapi(
 				xfs_extlen_t	extsz;
 
 				/* Figure out the extent size, adjust alen */
-				if (rt) {
-					if (!(extsz = ip->i_d.di_extsize))
-						extsz = mp->m_sb.sb_rextsize;
-				} else {
-					extsz = ip->i_d.di_extsize;
-				}
+				extsz = xfs_get_extsz_hint(ip);
 				if (extsz) {
 					error = xfs_bmap_extsize_align(mp,
 							&got, &prev, extsz,
@@ -5219,10 +5227,10 @@ xfs_bmapi(
 		 * Else go on to the next record.
 		 */
 		ep = xfs_iext_get_ext(ifp, ++lastx);
-		if (lastx >= nextents) {
+		prev = got;
+		if (lastx >= nextents)
 			eof = 1;
-			prev = got;
-		} else
+		else
 			xfs_bmbt_get_all(ep, &got);
 	}
 	ifp->if_lastex = lastx;
@@ -5813,8 +5821,7 @@ xfs_getbmap(
 		   ip->i_d.di_format != XFS_DINODE_FMT_LOCAL)
 		return XFS_ERROR(EINVAL);
 	if (whichfork == XFS_DATA_FORK) {
-		if ((ip->i_d.di_extsize && (ip->i_d.di_flags &
-				(XFS_DIFLAG_REALTIME|XFS_DIFLAG_EXTSIZE))) ||
+		if (xfs_get_extsz_hint(ip) ||
 		    ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)){
 			prealloced = 1;
 			fixlen = XFS_MAXIOFFSET(mp);
diff --git a/fs/xfs/xfs_bmap.h b/fs/xfs/xfs_bmap.h
index 4f24c7e..524b1c9 100644
--- a/fs/xfs/xfs_bmap.h
+++ b/fs/xfs/xfs_bmap.h
@@ -144,12 +144,14 @@ extern ktrace_t	*xfs_bmap_trace_buf;
  */
 void
 xfs_bmap_trace_exlist(
-	char			*fname,		/* function name */
+	const char		*fname,		/* function name */
 	struct xfs_inode	*ip,		/* incore inode pointer */
 	xfs_extnum_t		cnt,		/* count of entries in list */
 	int			whichfork);	/* data or attr fork */
+#define	XFS_BMAP_TRACE_EXLIST(ip,c,w)	\
+	xfs_bmap_trace_exlist(__FUNCTION__,ip,c,w)
 #else
-#define	xfs_bmap_trace_exlist(f,ip,c,w)
+#define	XFS_BMAP_TRACE_EXLIST(ip,c,w)
 #endif
 
 /*
diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c
index 0bf192f..89b891f 100644
--- a/fs/xfs/xfs_bmap_btree.c
+++ b/fs/xfs/xfs_bmap_btree.c
@@ -76,7 +76,7 @@ static char	EXIT[] = "exit";
  */
 STATIC void
 xfs_bmbt_trace_enter(
-	char		*func,
+	const char	*func,
 	xfs_btree_cur_t	*cur,
 	char		*s,
 	int		type,
@@ -117,7 +117,7 @@ xfs_bmbt_trace_enter(
  */
 STATIC void
 xfs_bmbt_trace_argbi(
-	char		*func,
+	const char	*func,
 	xfs_btree_cur_t	*cur,
 	xfs_buf_t	*b,
 	int		i,
@@ -134,7 +134,7 @@ xfs_bmbt_trace_argbi(
  */
 STATIC void
 xfs_bmbt_trace_argbii(
-	char		*func,
+	const char	*func,
 	xfs_btree_cur_t	*cur,
 	xfs_buf_t	*b,
 	int		i0,
@@ -153,7 +153,7 @@ xfs_bmbt_trace_argbii(
  */
 STATIC void
 xfs_bmbt_trace_argfffi(
-	char			*func,
+	const char		*func,
 	xfs_btree_cur_t		*cur,
 	xfs_dfiloff_t		o,
 	xfs_dfsbno_t		b,
@@ -172,7 +172,7 @@ xfs_bmbt_trace_argfffi(
  */
 STATIC void
 xfs_bmbt_trace_argi(
-	char		*func,
+	const char	*func,
 	xfs_btree_cur_t	*cur,
 	int		i,
 	int		line)
@@ -188,7 +188,7 @@ xfs_bmbt_trace_argi(
  */
 STATIC void
 xfs_bmbt_trace_argifk(
-	char			*func,
+	const char		*func,
 	xfs_btree_cur_t		*cur,
 	int			i,
 	xfs_fsblock_t		f,
@@ -206,7 +206,7 @@ xfs_bmbt_trace_argifk(
  */
 STATIC void
 xfs_bmbt_trace_argifr(
-	char			*func,
+	const char		*func,
 	xfs_btree_cur_t		*cur,
 	int			i,
 	xfs_fsblock_t		f,
@@ -235,7 +235,7 @@ xfs_bmbt_trace_argifr(
  */
 STATIC void
 xfs_bmbt_trace_argik(
-	char			*func,
+	const char		*func,
 	xfs_btree_cur_t		*cur,
 	int			i,
 	xfs_bmbt_key_t		*k,
@@ -255,7 +255,7 @@ xfs_bmbt_trace_argik(
  */
 STATIC void
 xfs_bmbt_trace_cursor(
-	char		*func,
+	const char	*func,
 	xfs_btree_cur_t	*cur,
 	char		*s,
 	int		line)
@@ -274,21 +274,21 @@ xfs_bmbt_trace_cursor(
 }
 
 #define	XFS_BMBT_TRACE_ARGBI(c,b,i)	\
-	xfs_bmbt_trace_argbi(fname, c, b, i, __LINE__)
+	xfs_bmbt_trace_argbi(__FUNCTION__, c, b, i, __LINE__)
 #define	XFS_BMBT_TRACE_ARGBII(c,b,i,j)	\
-	xfs_bmbt_trace_argbii(fname, c, b, i, j, __LINE__)
+	xfs_bmbt_trace_argbii(__FUNCTION__, c, b, i, j, __LINE__)
 #define	XFS_BMBT_TRACE_ARGFFFI(c,o,b,i,j)	\
-	xfs_bmbt_trace_argfffi(fname, c, o, b, i, j, __LINE__)
+	xfs_bmbt_trace_argfffi(__FUNCTION__, c, o, b, i, j, __LINE__)
 #define	XFS_BMBT_TRACE_ARGI(c,i)	\
-	xfs_bmbt_trace_argi(fname, c, i, __LINE__)
+	xfs_bmbt_trace_argi(__FUNCTION__, c, i, __LINE__)
 #define	XFS_BMBT_TRACE_ARGIFK(c,i,f,s)	\
-	xfs_bmbt_trace_argifk(fname, c, i, f, s, __LINE__)
+	xfs_bmbt_trace_argifk(__FUNCTION__, c, i, f, s, __LINE__)
 #define	XFS_BMBT_TRACE_ARGIFR(c,i,f,r)	\
-	xfs_bmbt_trace_argifr(fname, c, i, f, r, __LINE__)
+	xfs_bmbt_trace_argifr(__FUNCTION__, c, i, f, r, __LINE__)
 #define	XFS_BMBT_TRACE_ARGIK(c,i,k)	\
-	xfs_bmbt_trace_argik(fname, c, i, k, __LINE__)
+	xfs_bmbt_trace_argik(__FUNCTION__, c, i, k, __LINE__)
 #define	XFS_BMBT_TRACE_CURSOR(c,s)	\
-	xfs_bmbt_trace_cursor(fname, c, s, __LINE__)
+	xfs_bmbt_trace_cursor(__FUNCTION__, c, s, __LINE__)
 #else
 #define	XFS_BMBT_TRACE_ARGBI(c,b,i)
 #define	XFS_BMBT_TRACE_ARGBII(c,b,i,j)
@@ -318,9 +318,6 @@ xfs_bmbt_delrec(
 	xfs_fsblock_t		bno;		/* fs-relative block number */
 	xfs_buf_t		*bp;		/* buffer for block */
 	int			error;		/* error return value */
-#ifdef XFS_BMBT_TRACE
-	static char		fname[] = "xfs_bmbt_delrec";
-#endif
 	int			i;		/* loop counter */
 	int			j;		/* temp state */
 	xfs_bmbt_key_t		key;		/* bmap btree key */
@@ -694,9 +691,6 @@ xfs_bmbt_insrec(
 	xfs_bmbt_block_t	*block;		/* bmap btree block */
 	xfs_buf_t		*bp;		/* buffer for block */
 	int			error;		/* error return value */
-#ifdef XFS_BMBT_TRACE
-	static char		fname[] = "xfs_bmbt_insrec";
-#endif
 	int			i;		/* loop index */
 	xfs_bmbt_key_t		key;		/* bmap btree key */
 	xfs_bmbt_key_t		*kp=NULL;	/* pointer to bmap btree key */
@@ -881,9 +875,6 @@ xfs_bmbt_killroot(
 #ifdef DEBUG
 	int			error;
 #endif
-#ifdef XFS_BMBT_TRACE
-	static char		fname[] = "xfs_bmbt_killroot";
-#endif
 	int			i;
 	xfs_bmbt_key_t		*kp;
 	xfs_inode_t		*ip;
@@ -973,9 +964,6 @@ xfs_bmbt_log_keys(
 	int		kfirst,
 	int		klast)
 {
-#ifdef XFS_BMBT_TRACE
-	static char	fname[] = "xfs_bmbt_log_keys";
-#endif
 	xfs_trans_t	*tp;
 
 	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
@@ -1012,9 +1000,6 @@ xfs_bmbt_log_ptrs(
 	int		pfirst,
 	int		plast)
 {
-#ifdef XFS_BMBT_TRACE
-	static char	fname[] = "xfs_bmbt_log_ptrs";
-#endif
 	xfs_trans_t	*tp;
 
 	XFS_BMBT_TRACE_CURSOR(cur, ENTRY);
@@ -1055,9 +1040,6 @@ xfs_bmbt_lookup(
 	xfs_daddr_t		d;
 	xfs_sfiloff_t		diff;
 	int			error;		/* error return value */
-#ifdef XFS_BMBT_TRACE
-	static char	fname[] = "xfs_bmbt_lookup";
-#endif
 	xfs_fsblock_t		fsbno=0;
 	int			high;
 	int			i;
@@ -1195,9 +1177,6 @@ xfs_bmbt_lshift(
 	int			*stat)		/* success/failure */
 {
 	int			error;		/* error return value */
-#ifdef XFS_BMBT_TRACE
-	static char		fname[] = "xfs_bmbt_lshift";
-#endif
 #ifdef DEBUG
 	int			i;		/* loop counter */
 #endif
@@ -1331,9 +1310,6 @@ xfs_bmbt_rshift(
 	int			*stat)		/* success/failure */
 {
 	int			error;		/* error return value */
-#ifdef XFS_BMBT_TRACE
-	static char		fname[] = "xfs_bmbt_rshift";
-#endif
 	int			i;		/* loop counter */
 	xfs_bmbt_key_t		key;		/* bmap btree key */
 	xfs_buf_t		*lbp;		/* left buffer pointer */
@@ -1492,9 +1468,6 @@ xfs_bmbt_split(
 {
 	xfs_alloc_arg_t		args;		/* block allocation args */
 	int			error;		/* error return value */
-#ifdef XFS_BMBT_TRACE
-	static char		fname[] = "xfs_bmbt_split";
-#endif
 	int			i;		/* loop counter */
 	xfs_fsblock_t		lbno;		/* left sibling block number */
 	xfs_buf_t		*lbp;		/* left buffer pointer */
@@ -1641,9 +1614,6 @@ xfs_bmbt_updkey(
 #ifdef DEBUG
 	int			error;
 #endif
-#ifdef XFS_BMBT_TRACE
-	static char		fname[] = "xfs_bmbt_updkey";
-#endif
 	xfs_bmbt_key_t		*kp;
 	int			ptr;
 
@@ -1712,9 +1682,6 @@ xfs_bmbt_decrement(
 	xfs_bmbt_block_t	*block;
 	xfs_buf_t		*bp;
 	int			error;		/* error return value */
-#ifdef XFS_BMBT_TRACE
-	static char		fname[] = "xfs_bmbt_decrement";
-#endif
 	xfs_fsblock_t		fsbno;
 	int			lev;
 	xfs_mount_t		*mp;
@@ -1785,9 +1752,6 @@ xfs_bmbt_delete(
 	int		*stat)		/* success/failure */
 {
 	int		error;		/* error return value */
-#ifdef XFS_BMBT_TRACE
-	static char	fname[] = "xfs_bmbt_delete";
-#endif
 	int		i;
 	int		level;
 
@@ -2000,9 +1964,6 @@ xfs_bmbt_increment(
 	xfs_bmbt_block_t	*block;
 	xfs_buf_t		*bp;
 	int			error;		/* error return value */
-#ifdef XFS_BMBT_TRACE
-	static char		fname[] = "xfs_bmbt_increment";
-#endif
 	xfs_fsblock_t		fsbno;
 	int			lev;
 	xfs_mount_t		*mp;
@@ -2080,9 +2041,6 @@ xfs_bmbt_insert(
 	int		*stat)		/* success/failure */
 {
 	int		error;		/* error return value */
-#ifdef XFS_BMBT_TRACE
-	static char	fname[] = "xfs_bmbt_insert";
-#endif
 	int		i;
 	int		level;
 	xfs_fsblock_t	nbno;
@@ -2142,9 +2100,6 @@ xfs_bmbt_log_block(
 	int			fields)
 {
 	int			first;
-#ifdef XFS_BMBT_TRACE
-	static char		fname[] = "xfs_bmbt_log_block";
-#endif
 	int			last;
 	xfs_trans_t		*tp;
 	static const short	offsets[] = {
@@ -2181,9 +2136,6 @@ xfs_bmbt_log_recs(
 {
 	xfs_bmbt_block_t	*block;
 	int			first;
-#ifdef XFS_BMBT_TRACE
-	static char		fname[] = "xfs_bmbt_log_recs";
-#endif
 	int			last;
 	xfs_bmbt_rec_t		*rp;
 	xfs_trans_t		*tp;
@@ -2245,9 +2197,6 @@ xfs_bmbt_newroot(
 	xfs_bmbt_key_t		*ckp;		/* child key pointer */
 	xfs_bmbt_ptr_t		*cpp;		/* child ptr pointer */
 	int			error;		/* error return code */
-#ifdef XFS_BMBT_TRACE
-	static char		fname[] = "xfs_bmbt_newroot";
-#endif
 #ifdef DEBUG
 	int			i;		/* loop counter */
 #endif
@@ -2630,9 +2579,6 @@ xfs_bmbt_update(
 	xfs_bmbt_block_t	*block;
 	xfs_buf_t		*bp;
 	int			error;
-#ifdef XFS_BMBT_TRACE
-	static char		fname[] = "xfs_bmbt_update";
-#endif
 	xfs_bmbt_key_t		key;
 	int			ptr;
 	xfs_bmbt_rec_t		*rp;
diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h
index 4e27d55..6e40a0a 100644
--- a/fs/xfs/xfs_btree.h
+++ b/fs/xfs/xfs_btree.h
@@ -444,30 +444,14 @@ xfs_btree_setbuf(
 /*
  * Min and max functions for extlen, agblock, fileoff, and filblks types.
  */
-#define	XFS_EXTLEN_MIN(a,b)	\
-	((xfs_extlen_t)(a) < (xfs_extlen_t)(b) ? \
-		(xfs_extlen_t)(a) : (xfs_extlen_t)(b))
-#define	XFS_EXTLEN_MAX(a,b)	\
-	((xfs_extlen_t)(a) > (xfs_extlen_t)(b) ? \
-		(xfs_extlen_t)(a) : (xfs_extlen_t)(b))
-#define	XFS_AGBLOCK_MIN(a,b)	\
-	((xfs_agblock_t)(a) < (xfs_agblock_t)(b) ? \
-		(xfs_agblock_t)(a) : (xfs_agblock_t)(b))
-#define	XFS_AGBLOCK_MAX(a,b)	\
-	((xfs_agblock_t)(a) > (xfs_agblock_t)(b) ? \
-		(xfs_agblock_t)(a) : (xfs_agblock_t)(b))
-#define	XFS_FILEOFF_MIN(a,b)	\
-	((xfs_fileoff_t)(a) < (xfs_fileoff_t)(b) ? \
-		(xfs_fileoff_t)(a) : (xfs_fileoff_t)(b))
-#define	XFS_FILEOFF_MAX(a,b)	\
-	((xfs_fileoff_t)(a) > (xfs_fileoff_t)(b) ? \
-		(xfs_fileoff_t)(a) : (xfs_fileoff_t)(b))
-#define	XFS_FILBLKS_MIN(a,b)	\
-	((xfs_filblks_t)(a) < (xfs_filblks_t)(b) ? \
-		(xfs_filblks_t)(a) : (xfs_filblks_t)(b))
-#define	XFS_FILBLKS_MAX(a,b)	\
-	((xfs_filblks_t)(a) > (xfs_filblks_t)(b) ? \
-		(xfs_filblks_t)(a) : (xfs_filblks_t)(b))
+#define	XFS_EXTLEN_MIN(a,b)	min_t(xfs_extlen_t, (a), (b))
+#define	XFS_EXTLEN_MAX(a,b)	max_t(xfs_extlen_t, (a), (b))
+#define	XFS_AGBLOCK_MIN(a,b)	min_t(xfs_agblock_t, (a), (b))
+#define	XFS_AGBLOCK_MAX(a,b)	max_t(xfs_agblock_t, (a), (b))
+#define	XFS_FILEOFF_MIN(a,b)	min_t(xfs_fileoff_t, (a), (b))
+#define	XFS_FILEOFF_MAX(a,b)	max_t(xfs_fileoff_t, (a), (b))
+#define	XFS_FILBLKS_MIN(a,b)	min_t(xfs_filblks_t, (a), (b))
+#define	XFS_FILBLKS_MAX(a,b)	max_t(xfs_filblks_t, (a), (b))
 
 #define	XFS_FSB_SANITY_CHECK(mp,fsb)	\
 	(XFS_FSB_TO_AGNO(mp, fsb) < mp->m_sb.sb_agcount && \
diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c
index 6c1bddc..b0667cb 100644
--- a/fs/xfs/xfs_buf_item.c
+++ b/fs/xfs/xfs_buf_item.c
@@ -580,8 +580,8 @@ xfs_buf_item_unlock(
 	 * If the buf item isn't tracking any data, free it.
 	 * Otherwise, if XFS_BLI_HOLD is set clear it.
 	 */
-	if (xfs_count_bits(bip->bli_format.blf_data_map,
-			      bip->bli_format.blf_map_size, 0) == 0) {
+	if (xfs_bitmap_empty(bip->bli_format.blf_data_map,
+			     bip->bli_format.blf_map_size)) {
 		xfs_buf_item_relse(bp);
 	} else if (hold) {
 		bip->bli_flags &= ~XFS_BLI_HOLD;
diff --git a/fs/xfs/xfs_clnt.h b/fs/xfs/xfs_clnt.h
index 5b7eb81..f89196c 100644
--- a/fs/xfs/xfs_clnt.h
+++ b/fs/xfs/xfs_clnt.h
@@ -99,5 +99,7 @@ struct xfs_mount_args {
  */
 #define XFSMNT2_COMPAT_IOSIZE	0x00000001	/* don't report large preferred
 						 * I/O size in stat(2) */
+#define XFSMNT2_FILESTREAMS	0x00000002	/* enable the filestreams
+						 * allocator */
 
 #endif	/* __XFS_CLNT_H__ */
diff --git a/fs/xfs/xfs_dinode.h b/fs/xfs/xfs_dinode.h
index b338269..fefd011 100644
--- a/fs/xfs/xfs_dinode.h
+++ b/fs/xfs/xfs_dinode.h
@@ -257,6 +257,7 @@ typedef enum xfs_dinode_fmt
 #define XFS_DIFLAG_EXTSIZE_BIT      11	/* inode extent size allocator hint */
 #define XFS_DIFLAG_EXTSZINHERIT_BIT 12	/* inherit inode extent size */
 #define XFS_DIFLAG_NODEFRAG_BIT     13	/* do not reorganize/defragment */
+#define XFS_DIFLAG_FILESTREAM_BIT   14  /* use filestream allocator */
 #define XFS_DIFLAG_REALTIME      (1 << XFS_DIFLAG_REALTIME_BIT)
 #define XFS_DIFLAG_PREALLOC      (1 << XFS_DIFLAG_PREALLOC_BIT)
 #define XFS_DIFLAG_NEWRTBM       (1 << XFS_DIFLAG_NEWRTBM_BIT)
@@ -271,12 +272,13 @@ typedef enum xfs_dinode_fmt
 #define XFS_DIFLAG_EXTSIZE       (1 << XFS_DIFLAG_EXTSIZE_BIT)
 #define XFS_DIFLAG_EXTSZINHERIT  (1 << XFS_DIFLAG_EXTSZINHERIT_BIT)
 #define XFS_DIFLAG_NODEFRAG      (1 << XFS_DIFLAG_NODEFRAG_BIT)
+#define XFS_DIFLAG_FILESTREAM    (1 << XFS_DIFLAG_FILESTREAM_BIT)
 
 #define XFS_DIFLAG_ANY \
 	(XFS_DIFLAG_REALTIME | XFS_DIFLAG_PREALLOC | XFS_DIFLAG_NEWRTBM | \
 	 XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND | XFS_DIFLAG_SYNC | \
 	 XFS_DIFLAG_NOATIME | XFS_DIFLAG_NODUMP | XFS_DIFLAG_RTINHERIT | \
 	 XFS_DIFLAG_PROJINHERIT | XFS_DIFLAG_NOSYMLINKS | XFS_DIFLAG_EXTSIZE | \
-	 XFS_DIFLAG_EXTSZINHERIT | XFS_DIFLAG_NODEFRAG)
+	 XFS_DIFLAG_EXTSZINHERIT | XFS_DIFLAG_NODEFRAG | XFS_DIFLAG_FILESTREAM)
 
 #endif	/* __XFS_DINODE_H__ */
diff --git a/fs/xfs/xfs_dir2.c b/fs/xfs/xfs_dir2.c
index 8e8e527..29e0919 100644
--- a/fs/xfs/xfs_dir2.c
+++ b/fs/xfs/xfs_dir2.c
@@ -55,9 +55,9 @@ xfs_dir_mount(
 	       XFS_MAX_BLOCKSIZE);
 	mp->m_dirblksize = 1 << (mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog);
 	mp->m_dirblkfsbs = 1 << mp->m_sb.sb_dirblklog;
-	mp->m_dirdatablk = XFS_DIR2_DB_TO_DA(mp, XFS_DIR2_DATA_FIRSTDB(mp));
-	mp->m_dirleafblk = XFS_DIR2_DB_TO_DA(mp, XFS_DIR2_LEAF_FIRSTDB(mp));
-	mp->m_dirfreeblk = XFS_DIR2_DB_TO_DA(mp, XFS_DIR2_FREE_FIRSTDB(mp));
+	mp->m_dirdatablk = xfs_dir2_db_to_da(mp, XFS_DIR2_DATA_FIRSTDB(mp));
+	mp->m_dirleafblk = xfs_dir2_db_to_da(mp, XFS_DIR2_LEAF_FIRSTDB(mp));
+	mp->m_dirfreeblk = xfs_dir2_db_to_da(mp, XFS_DIR2_FREE_FIRSTDB(mp));
 	mp->m_attr_node_ents =
 		(mp->m_sb.sb_blocksize - (uint)sizeof(xfs_da_node_hdr_t)) /
 		(uint)sizeof(xfs_da_node_entry_t);
@@ -554,7 +554,7 @@ xfs_dir2_grow_inode(
 	 */
 	if (mapp != &map)
 		kmem_free(mapp, sizeof(*mapp) * count);
-	*dbp = XFS_DIR2_DA_TO_DB(mp, (xfs_dablk_t)bno);
+	*dbp = xfs_dir2_da_to_db(mp, (xfs_dablk_t)bno);
 	/*
 	 * Update file's size if this is the data space and it grew.
 	 */
@@ -706,7 +706,7 @@ xfs_dir2_shrink_inode(
 	dp = args->dp;
 	mp = dp->i_mount;
 	tp = args->trans;
-	da = XFS_DIR2_DB_TO_DA(mp, db);
+	da = xfs_dir2_db_to_da(mp, db);
 	/*
 	 * Unmap the fsblock(s).
 	 */
@@ -742,7 +742,7 @@ xfs_dir2_shrink_inode(
 	/*
 	 * If the block isn't the last one in the directory, we're done.
 	 */
-	if (dp->i_d.di_size > XFS_DIR2_DB_OFF_TO_BYTE(mp, db + 1, 0))
+	if (dp->i_d.di_size > xfs_dir2_db_off_to_byte(mp, db + 1, 0))
 		return 0;
 	bno = da;
 	if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) {
diff --git a/fs/xfs/xfs_dir2_block.c b/fs/xfs/xfs_dir2_block.c
index 3accc1d..e4df1aa 100644
--- a/fs/xfs/xfs_dir2_block.c
+++ b/fs/xfs/xfs_dir2_block.c
@@ -115,13 +115,13 @@ xfs_dir2_block_addname(
 		xfs_da_brelse(tp, bp);
 		return XFS_ERROR(EFSCORRUPTED);
 	}
-	len = XFS_DIR2_DATA_ENTSIZE(args->namelen);
+	len = xfs_dir2_data_entsize(args->namelen);
 	/*
 	 * Set up pointers to parts of the block.
 	 */
 	bf = block->hdr.bestfree;
-	btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
-	blp = XFS_DIR2_BLOCK_LEAF_P(btp);
+	btp = xfs_dir2_block_tail_p(mp, block);
+	blp = xfs_dir2_block_leaf_p(btp);
 	/*
 	 * No stale entries?  Need space for entry and new leaf.
 	 */
@@ -396,7 +396,7 @@ xfs_dir2_block_addname(
 	 * Fill in the leaf entry.
 	 */
 	blp[mid].hashval = cpu_to_be32(args->hashval);
-	blp[mid].address = cpu_to_be32(XFS_DIR2_BYTE_TO_DATAPTR(mp,
+	blp[mid].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(mp,
 				(char *)dep - (char *)block));
 	xfs_dir2_block_log_leaf(tp, bp, lfloglow, lfloghigh);
 	/*
@@ -411,7 +411,7 @@ xfs_dir2_block_addname(
 	dep->inumber = cpu_to_be64(args->inumber);
 	dep->namelen = args->namelen;
 	memcpy(dep->name, args->name, args->namelen);
-	tagp = XFS_DIR2_DATA_ENTRY_TAG_P(dep);
+	tagp = xfs_dir2_data_entry_tag_p(dep);
 	*tagp = cpu_to_be16((char *)dep - (char *)block);
 	/*
 	 * Clean up the bestfree array and log the header, tail, and entry.
@@ -455,7 +455,7 @@ xfs_dir2_block_getdents(
 	/*
 	 * If the block number in the offset is out of range, we're done.
 	 */
-	if (XFS_DIR2_DATAPTR_TO_DB(mp, uio->uio_offset) > mp->m_dirdatablk) {
+	if (xfs_dir2_dataptr_to_db(mp, uio->uio_offset) > mp->m_dirdatablk) {
 		*eofp = 1;
 		return 0;
 	}
@@ -471,15 +471,15 @@ xfs_dir2_block_getdents(
 	 * Extract the byte offset we start at from the seek pointer.
 	 * We'll skip entries before this.
 	 */
-	wantoff = XFS_DIR2_DATAPTR_TO_OFF(mp, uio->uio_offset);
+	wantoff = xfs_dir2_dataptr_to_off(mp, uio->uio_offset);
 	block = bp->data;
 	xfs_dir2_data_check(dp, bp);
 	/*
 	 * Set up values for the loop.
 	 */
-	btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
+	btp = xfs_dir2_block_tail_p(mp, block);
 	ptr = (char *)block->u;
-	endptr = (char *)XFS_DIR2_BLOCK_LEAF_P(btp);
+	endptr = (char *)xfs_dir2_block_leaf_p(btp);
 	p.dbp = dbp;
 	p.put = put;
 	p.uio = uio;
@@ -502,7 +502,7 @@ xfs_dir2_block_getdents(
 		/*
 		 * Bump pointer for the next iteration.
 		 */
-		ptr += XFS_DIR2_DATA_ENTSIZE(dep->namelen);
+		ptr += xfs_dir2_data_entsize(dep->namelen);
 		/*
 		 * The entry is before the desired starting point, skip it.
 		 */
@@ -513,7 +513,7 @@ xfs_dir2_block_getdents(
 		 */
 		p.namelen = dep->namelen;
 
-		p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
+		p.cook = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
 						    ptr - (char *)block);
 		p.ino = be64_to_cpu(dep->inumber);
 #if XFS_BIG_INUMS
@@ -531,7 +531,7 @@ xfs_dir2_block_getdents(
 		 */
 		if (!p.done) {
 			uio->uio_offset =
-				XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
+				xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
 					(char *)dep - (char *)block);
 			xfs_da_brelse(tp, bp);
 			return error;
@@ -545,7 +545,7 @@ xfs_dir2_block_getdents(
 	*eofp = 1;
 
 	uio->uio_offset =
-		XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk + 1, 0);
+		xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk + 1, 0);
 
 	xfs_da_brelse(tp, bp);
 
@@ -569,8 +569,8 @@ xfs_dir2_block_log_leaf(
 
 	mp = tp->t_mountp;
 	block = bp->data;
-	btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
-	blp = XFS_DIR2_BLOCK_LEAF_P(btp);
+	btp = xfs_dir2_block_tail_p(mp, block);
+	blp = xfs_dir2_block_leaf_p(btp);
 	xfs_da_log_buf(tp, bp, (uint)((char *)&blp[first] - (char *)block),
 		(uint)((char *)&blp[last + 1] - (char *)block - 1));
 }
@@ -589,7 +589,7 @@ xfs_dir2_block_log_tail(
 
 	mp = tp->t_mountp;
 	block = bp->data;
-	btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
+	btp = xfs_dir2_block_tail_p(mp, block);
 	xfs_da_log_buf(tp, bp, (uint)((char *)btp - (char *)block),
 		(uint)((char *)(btp + 1) - (char *)block - 1));
 }
@@ -623,13 +623,13 @@ xfs_dir2_block_lookup(
 	mp = dp->i_mount;
 	block = bp->data;
 	xfs_dir2_data_check(dp, bp);
-	btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
-	blp = XFS_DIR2_BLOCK_LEAF_P(btp);
+	btp = xfs_dir2_block_tail_p(mp, block);
+	blp = xfs_dir2_block_leaf_p(btp);
 	/*
 	 * Get the offset from the leaf entry, to point to the data.
 	 */
 	dep = (xfs_dir2_data_entry_t *)
-	      ((char *)block + XFS_DIR2_DATAPTR_TO_OFF(mp, be32_to_cpu(blp[ent].address)));
+	      ((char *)block + xfs_dir2_dataptr_to_off(mp, be32_to_cpu(blp[ent].address)));
 	/*
 	 * Fill in inode number, release the block.
 	 */
@@ -675,8 +675,8 @@ xfs_dir2_block_lookup_int(
 	ASSERT(bp != NULL);
 	block = bp->data;
 	xfs_dir2_data_check(dp, bp);
-	btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
-	blp = XFS_DIR2_BLOCK_LEAF_P(btp);
+	btp = xfs_dir2_block_tail_p(mp, block);
+	blp = xfs_dir2_block_leaf_p(btp);
 	/*
 	 * Loop doing a binary search for our hash value.
 	 * Find our entry, ENOENT if it's not there.
@@ -713,7 +713,7 @@ xfs_dir2_block_lookup_int(
 		 * Get pointer to the entry from the leaf.
 		 */
 		dep = (xfs_dir2_data_entry_t *)
-			((char *)block + XFS_DIR2_DATAPTR_TO_OFF(mp, addr));
+			((char *)block + xfs_dir2_dataptr_to_off(mp, addr));
 		/*
 		 * Compare, if it's right give back buffer & entry number.
 		 */
@@ -768,20 +768,20 @@ xfs_dir2_block_removename(
 	tp = args->trans;
 	mp = dp->i_mount;
 	block = bp->data;
-	btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
-	blp = XFS_DIR2_BLOCK_LEAF_P(btp);
+	btp = xfs_dir2_block_tail_p(mp, block);
+	blp = xfs_dir2_block_leaf_p(btp);
 	/*
 	 * Point to the data entry using the leaf entry.
 	 */
 	dep = (xfs_dir2_data_entry_t *)
-	      ((char *)block + XFS_DIR2_DATAPTR_TO_OFF(mp, be32_to_cpu(blp[ent].address)));
+	      ((char *)block + xfs_dir2_dataptr_to_off(mp, be32_to_cpu(blp[ent].address)));
 	/*
 	 * Mark the data entry's space free.
 	 */
 	needlog = needscan = 0;
 	xfs_dir2_data_make_free(tp, bp,
 		(xfs_dir2_data_aoff_t)((char *)dep - (char *)block),
-		XFS_DIR2_DATA_ENTSIZE(dep->namelen), &needlog, &needscan);
+		xfs_dir2_data_entsize(dep->namelen), &needlog, &needscan);
 	/*
 	 * Fix up the block tail.
 	 */
@@ -843,13 +843,13 @@ xfs_dir2_block_replace(
 	dp = args->dp;
 	mp = dp->i_mount;
 	block = bp->data;
-	btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
-	blp = XFS_DIR2_BLOCK_LEAF_P(btp);
+	btp = xfs_dir2_block_tail_p(mp, block);
+	blp = xfs_dir2_block_leaf_p(btp);
 	/*
 	 * Point to the data entry we need to change.
 	 */
 	dep = (xfs_dir2_data_entry_t *)
-	      ((char *)block + XFS_DIR2_DATAPTR_TO_OFF(mp, be32_to_cpu(blp[ent].address)));
+	      ((char *)block + xfs_dir2_dataptr_to_off(mp, be32_to_cpu(blp[ent].address)));
 	ASSERT(be64_to_cpu(dep->inumber) != args->inumber);
 	/*
 	 * Change the inode number to the new value.
@@ -912,7 +912,7 @@ xfs_dir2_leaf_to_block(
 	mp = dp->i_mount;
 	leaf = lbp->data;
 	ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAF1_MAGIC);
-	ltp = XFS_DIR2_LEAF_TAIL_P(mp, leaf);
+	ltp = xfs_dir2_leaf_tail_p(mp, leaf);
 	/*
 	 * If there are data blocks other than the first one, take this
 	 * opportunity to remove trailing empty data blocks that may have
@@ -920,7 +920,7 @@ xfs_dir2_leaf_to_block(
 	 * These will show up in the leaf bests table.
 	 */
 	while (dp->i_d.di_size > mp->m_dirblksize) {
-		bestsp = XFS_DIR2_LEAF_BESTS_P(ltp);
+		bestsp = xfs_dir2_leaf_bests_p(ltp);
 		if (be16_to_cpu(bestsp[be32_to_cpu(ltp->bestcount) - 1]) ==
 		    mp->m_dirblksize - (uint)sizeof(block->hdr)) {
 			if ((error =
@@ -974,14 +974,14 @@ xfs_dir2_leaf_to_block(
 	/*
 	 * Initialize the block tail.
 	 */
-	btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
+	btp = xfs_dir2_block_tail_p(mp, block);
 	btp->count = cpu_to_be32(be16_to_cpu(leaf->hdr.count) - be16_to_cpu(leaf->hdr.stale));
 	btp->stale = 0;
 	xfs_dir2_block_log_tail(tp, dbp);
 	/*
 	 * Initialize the block leaf area.  We compact out stale entries.
 	 */
-	lep = XFS_DIR2_BLOCK_LEAF_P(btp);
+	lep = xfs_dir2_block_leaf_p(btp);
 	for (from = to = 0; from < be16_to_cpu(leaf->hdr.count); from++) {
 		if (be32_to_cpu(leaf->ents[from].address) == XFS_DIR2_NULL_DATAPTR)
 			continue;
@@ -1067,7 +1067,7 @@ xfs_dir2_sf_to_block(
 	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
 	ASSERT(dp->i_df.if_u1.if_data != NULL);
 	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
-	ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
+	ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
 	/*
 	 * Copy the directory into the stack buffer.
 	 * Then pitch the incore inode data so we can make extents.
@@ -1119,10 +1119,10 @@ xfs_dir2_sf_to_block(
 	/*
 	 * Fill in the tail.
 	 */
-	btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
+	btp = xfs_dir2_block_tail_p(mp, block);
 	btp->count = cpu_to_be32(sfp->hdr.count + 2);	/* ., .. */
 	btp->stale = 0;
-	blp = XFS_DIR2_BLOCK_LEAF_P(btp);
+	blp = xfs_dir2_block_leaf_p(btp);
 	endoffset = (uint)((char *)blp - (char *)block);
 	/*
 	 * Remove the freespace, we'll manage it.
@@ -1138,25 +1138,25 @@ xfs_dir2_sf_to_block(
 	dep->inumber = cpu_to_be64(dp->i_ino);
 	dep->namelen = 1;
 	dep->name[0] = '.';
-	tagp = XFS_DIR2_DATA_ENTRY_TAG_P(dep);
+	tagp = xfs_dir2_data_entry_tag_p(dep);
 	*tagp = cpu_to_be16((char *)dep - (char *)block);
 	xfs_dir2_data_log_entry(tp, bp, dep);
 	blp[0].hashval = cpu_to_be32(xfs_dir_hash_dot);
-	blp[0].address = cpu_to_be32(XFS_DIR2_BYTE_TO_DATAPTR(mp,
+	blp[0].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(mp,
 				(char *)dep - (char *)block));
 	/*
 	 * Create entry for ..
 	 */
 	dep = (xfs_dir2_data_entry_t *)
 		((char *)block + XFS_DIR2_DATA_DOTDOT_OFFSET);
-	dep->inumber = cpu_to_be64(XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent));
+	dep->inumber = cpu_to_be64(xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent));
 	dep->namelen = 2;
 	dep->name[0] = dep->name[1] = '.';
-	tagp = XFS_DIR2_DATA_ENTRY_TAG_P(dep);
+	tagp = xfs_dir2_data_entry_tag_p(dep);
 	*tagp = cpu_to_be16((char *)dep - (char *)block);
 	xfs_dir2_data_log_entry(tp, bp, dep);
 	blp[1].hashval = cpu_to_be32(xfs_dir_hash_dotdot);
-	blp[1].address = cpu_to_be32(XFS_DIR2_BYTE_TO_DATAPTR(mp,
+	blp[1].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(mp,
 				(char *)dep - (char *)block));
 	offset = XFS_DIR2_DATA_FIRST_OFFSET;
 	/*
@@ -1165,7 +1165,7 @@ xfs_dir2_sf_to_block(
 	if ((i = 0) == sfp->hdr.count)
 		sfep = NULL;
 	else
-		sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
+		sfep = xfs_dir2_sf_firstentry(sfp);
 	/*
 	 * Need to preserve the existing offset values in the sf directory.
 	 * Insert holes (unused entries) where necessary.
@@ -1177,7 +1177,7 @@ xfs_dir2_sf_to_block(
 		if (sfep == NULL)
 			newoffset = endoffset;
 		else
-			newoffset = XFS_DIR2_SF_GET_OFFSET(sfep);
+			newoffset = xfs_dir2_sf_get_offset(sfep);
 		/*
 		 * There should be a hole here, make one.
 		 */
@@ -1186,7 +1186,7 @@ xfs_dir2_sf_to_block(
 			      ((char *)block + offset);
 			dup->freetag = cpu_to_be16(XFS_DIR2_DATA_FREE_TAG);
 			dup->length = cpu_to_be16(newoffset - offset);
-			*XFS_DIR2_DATA_UNUSED_TAG_P(dup) = cpu_to_be16(
+			*xfs_dir2_data_unused_tag_p(dup) = cpu_to_be16(
 				((char *)dup - (char *)block));
 			xfs_dir2_data_log_unused(tp, bp, dup);
 			(void)xfs_dir2_data_freeinsert((xfs_dir2_data_t *)block,
@@ -1198,22 +1198,22 @@ xfs_dir2_sf_to_block(
 		 * Copy a real entry.
 		 */
 		dep = (xfs_dir2_data_entry_t *)((char *)block + newoffset);
-		dep->inumber = cpu_to_be64(XFS_DIR2_SF_GET_INUMBER(sfp,
-				XFS_DIR2_SF_INUMBERP(sfep)));
+		dep->inumber = cpu_to_be64(xfs_dir2_sf_get_inumber(sfp,
+				xfs_dir2_sf_inumberp(sfep)));
 		dep->namelen = sfep->namelen;
 		memcpy(dep->name, sfep->name, dep->namelen);
-		tagp = XFS_DIR2_DATA_ENTRY_TAG_P(dep);
+		tagp = xfs_dir2_data_entry_tag_p(dep);
 		*tagp = cpu_to_be16((char *)dep - (char *)block);
 		xfs_dir2_data_log_entry(tp, bp, dep);
 		blp[2 + i].hashval = cpu_to_be32(xfs_da_hashname(
 					(char *)sfep->name, sfep->namelen));
-		blp[2 + i].address = cpu_to_be32(XFS_DIR2_BYTE_TO_DATAPTR(mp,
+		blp[2 + i].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(mp,
 						 (char *)dep - (char *)block));
 		offset = (int)((char *)(tagp + 1) - (char *)block);
 		if (++i == sfp->hdr.count)
 			sfep = NULL;
 		else
-			sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep);
+			sfep = xfs_dir2_sf_nextentry(sfp, sfep);
 	}
 	/* Done with the temporary buffer */
 	kmem_free(buf, buf_len);
diff --git a/fs/xfs/xfs_dir2_block.h b/fs/xfs/xfs_dir2_block.h
index 6722eff..e7c2606 100644
--- a/fs/xfs/xfs_dir2_block.h
+++ b/fs/xfs/xfs_dir2_block.h
@@ -60,7 +60,6 @@ typedef struct xfs_dir2_block {
 /*
  * Pointer to the leaf header embedded in a data block (1-block format)
  */
-#define	XFS_DIR2_BLOCK_TAIL_P(mp,block)	xfs_dir2_block_tail_p(mp,block)
 static inline xfs_dir2_block_tail_t *
 xfs_dir2_block_tail_p(struct xfs_mount *mp, xfs_dir2_block_t *block)
 {
@@ -71,7 +70,6 @@ xfs_dir2_block_tail_p(struct xfs_mount *mp, xfs_dir2_block_t *block)
 /*
  * Pointer to the leaf entries embedded in a data block (1-block format)
  */
-#define	XFS_DIR2_BLOCK_LEAF_P(btp)	xfs_dir2_block_leaf_p(btp)
 static inline struct xfs_dir2_leaf_entry *
 xfs_dir2_block_leaf_p(xfs_dir2_block_tail_t *btp)
 {
diff --git a/fs/xfs/xfs_dir2_data.c b/fs/xfs/xfs_dir2_data.c
index c211c37..7ebe295 100644
--- a/fs/xfs/xfs_dir2_data.c
+++ b/fs/xfs/xfs_dir2_data.c
@@ -72,8 +72,8 @@ xfs_dir2_data_check(
 	bf = d->hdr.bestfree;
 	p = (char *)d->u;
 	if (be32_to_cpu(d->hdr.magic) == XFS_DIR2_BLOCK_MAGIC) {
-		btp = XFS_DIR2_BLOCK_TAIL_P(mp, (xfs_dir2_block_t *)d);
-		lep = XFS_DIR2_BLOCK_LEAF_P(btp);
+		btp = xfs_dir2_block_tail_p(mp, (xfs_dir2_block_t *)d);
+		lep = xfs_dir2_block_leaf_p(btp);
 		endp = (char *)lep;
 	} else
 		endp = (char *)d + mp->m_dirblksize;
@@ -107,7 +107,7 @@ xfs_dir2_data_check(
 		 */
 		if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
 			ASSERT(lastfree == 0);
-			ASSERT(be16_to_cpu(*XFS_DIR2_DATA_UNUSED_TAG_P(dup)) ==
+			ASSERT(be16_to_cpu(*xfs_dir2_data_unused_tag_p(dup)) ==
 			       (char *)dup - (char *)d);
 			dfp = xfs_dir2_data_freefind(d, dup);
 			if (dfp) {
@@ -131,12 +131,12 @@ xfs_dir2_data_check(
 		dep = (xfs_dir2_data_entry_t *)p;
 		ASSERT(dep->namelen != 0);
 		ASSERT(xfs_dir_ino_validate(mp, be64_to_cpu(dep->inumber)) == 0);
-		ASSERT(be16_to_cpu(*XFS_DIR2_DATA_ENTRY_TAG_P(dep)) ==
+		ASSERT(be16_to_cpu(*xfs_dir2_data_entry_tag_p(dep)) ==
 		       (char *)dep - (char *)d);
 		count++;
 		lastfree = 0;
 		if (be32_to_cpu(d->hdr.magic) == XFS_DIR2_BLOCK_MAGIC) {
-			addr = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
+			addr = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
 				(xfs_dir2_data_aoff_t)
 				((char *)dep - (char *)d));
 			hash = xfs_da_hashname((char *)dep->name, dep->namelen);
@@ -147,7 +147,7 @@ xfs_dir2_data_check(
 			}
 			ASSERT(i < be32_to_cpu(btp->count));
 		}
-		p += XFS_DIR2_DATA_ENTSIZE(dep->namelen);
+		p += xfs_dir2_data_entsize(dep->namelen);
 	}
 	/*
 	 * Need to have seen all the entries and all the bestfree slots.
@@ -346,8 +346,8 @@ xfs_dir2_data_freescan(
 	 */
 	p = (char *)d->u;
 	if (be32_to_cpu(d->hdr.magic) == XFS_DIR2_BLOCK_MAGIC) {
-		btp = XFS_DIR2_BLOCK_TAIL_P(mp, (xfs_dir2_block_t *)d);
-		endp = (char *)XFS_DIR2_BLOCK_LEAF_P(btp);
+		btp = xfs_dir2_block_tail_p(mp, (xfs_dir2_block_t *)d);
+		endp = (char *)xfs_dir2_block_leaf_p(btp);
 	} else
 		endp = (char *)d + mp->m_dirblksize;
 	/*
@@ -360,7 +360,7 @@ xfs_dir2_data_freescan(
 		 */
 		if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
 			ASSERT((char *)dup - (char *)d ==
-			       be16_to_cpu(*XFS_DIR2_DATA_UNUSED_TAG_P(dup)));
+			       be16_to_cpu(*xfs_dir2_data_unused_tag_p(dup)));
 			xfs_dir2_data_freeinsert(d, dup, loghead);
 			p += be16_to_cpu(dup->length);
 		}
@@ -370,8 +370,8 @@ xfs_dir2_data_freescan(
 		else {
 			dep = (xfs_dir2_data_entry_t *)p;
 			ASSERT((char *)dep - (char *)d ==
-			       be16_to_cpu(*XFS_DIR2_DATA_ENTRY_TAG_P(dep)));
-			p += XFS_DIR2_DATA_ENTSIZE(dep->namelen);
+			       be16_to_cpu(*xfs_dir2_data_entry_tag_p(dep)));
+			p += xfs_dir2_data_entsize(dep->namelen);
 		}
 	}
 }
@@ -402,7 +402,7 @@ xfs_dir2_data_init(
 	/*
 	 * Get the buffer set up for the block.
 	 */
-	error = xfs_da_get_buf(tp, dp, XFS_DIR2_DB_TO_DA(mp, blkno), -1, &bp,
+	error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, blkno), -1, &bp,
 		XFS_DATA_FORK);
 	if (error) {
 		return error;
@@ -427,7 +427,7 @@ xfs_dir2_data_init(
 	t=mp->m_dirblksize - (uint)sizeof(d->hdr);
 	d->hdr.bestfree[0].length = cpu_to_be16(t);
 	dup->length = cpu_to_be16(t);
-	*XFS_DIR2_DATA_UNUSED_TAG_P(dup) = cpu_to_be16((char *)dup - (char *)d);
+	*xfs_dir2_data_unused_tag_p(dup) = cpu_to_be16((char *)dup - (char *)d);
 	/*
 	 * Log it and return it.
 	 */
@@ -452,7 +452,7 @@ xfs_dir2_data_log_entry(
 	ASSERT(be32_to_cpu(d->hdr.magic) == XFS_DIR2_DATA_MAGIC ||
 	       be32_to_cpu(d->hdr.magic) == XFS_DIR2_BLOCK_MAGIC);
 	xfs_da_log_buf(tp, bp, (uint)((char *)dep - (char *)d),
-		(uint)((char *)(XFS_DIR2_DATA_ENTRY_TAG_P(dep) + 1) -
+		(uint)((char *)(xfs_dir2_data_entry_tag_p(dep) + 1) -
 		       (char *)d - 1));
 }
 
@@ -497,8 +497,8 @@ xfs_dir2_data_log_unused(
 	 * Log the end (tag) of the unused entry.
 	 */
 	xfs_da_log_buf(tp, bp,
-		(uint)((char *)XFS_DIR2_DATA_UNUSED_TAG_P(dup) - (char *)d),
-		(uint)((char *)XFS_DIR2_DATA_UNUSED_TAG_P(dup) - (char *)d +
+		(uint)((char *)xfs_dir2_data_unused_tag_p(dup) - (char *)d),
+		(uint)((char *)xfs_dir2_data_unused_tag_p(dup) - (char *)d +
 		       sizeof(xfs_dir2_data_off_t) - 1));
 }
 
@@ -535,8 +535,8 @@ xfs_dir2_data_make_free(
 		xfs_dir2_block_tail_t	*btp;	/* block tail */
 
 		ASSERT(be32_to_cpu(d->hdr.magic) == XFS_DIR2_BLOCK_MAGIC);
-		btp = XFS_DIR2_BLOCK_TAIL_P(mp, (xfs_dir2_block_t *)d);
-		endptr = (char *)XFS_DIR2_BLOCK_LEAF_P(btp);
+		btp = xfs_dir2_block_tail_p(mp, (xfs_dir2_block_t *)d);
+		endptr = (char *)xfs_dir2_block_leaf_p(btp);
 	}
 	/*
 	 * If this isn't the start of the block, then back up to
@@ -587,7 +587,7 @@ xfs_dir2_data_make_free(
 		 * Fix up the new big freespace.
 		 */
 		be16_add(&prevdup->length, len + be16_to_cpu(postdup->length));
-		*XFS_DIR2_DATA_UNUSED_TAG_P(prevdup) =
+		*xfs_dir2_data_unused_tag_p(prevdup) =
 			cpu_to_be16((char *)prevdup - (char *)d);
 		xfs_dir2_data_log_unused(tp, bp, prevdup);
 		if (!needscan) {
@@ -621,7 +621,7 @@ xfs_dir2_data_make_free(
 	else if (prevdup) {
 		dfp = xfs_dir2_data_freefind(d, prevdup);
 		be16_add(&prevdup->length, len);
-		*XFS_DIR2_DATA_UNUSED_TAG_P(prevdup) =
+		*xfs_dir2_data_unused_tag_p(prevdup) =
 			cpu_to_be16((char *)prevdup - (char *)d);
 		xfs_dir2_data_log_unused(tp, bp, prevdup);
 		/*
@@ -649,7 +649,7 @@ xfs_dir2_data_make_free(
 		newdup = (xfs_dir2_data_unused_t *)((char *)d + offset);
 		newdup->freetag = cpu_to_be16(XFS_DIR2_DATA_FREE_TAG);
 		newdup->length = cpu_to_be16(len + be16_to_cpu(postdup->length));
-		*XFS_DIR2_DATA_UNUSED_TAG_P(newdup) =
+		*xfs_dir2_data_unused_tag_p(newdup) =
 			cpu_to_be16((char *)newdup - (char *)d);
 		xfs_dir2_data_log_unused(tp, bp, newdup);
 		/*
@@ -676,7 +676,7 @@ xfs_dir2_data_make_free(
 		newdup = (xfs_dir2_data_unused_t *)((char *)d + offset);
 		newdup->freetag = cpu_to_be16(XFS_DIR2_DATA_FREE_TAG);
 		newdup->length = cpu_to_be16(len);
-		*XFS_DIR2_DATA_UNUSED_TAG_P(newdup) =
+		*xfs_dir2_data_unused_tag_p(newdup) =
 			cpu_to_be16((char *)newdup - (char *)d);
 		xfs_dir2_data_log_unused(tp, bp, newdup);
 		(void)xfs_dir2_data_freeinsert(d, newdup, needlogp);
@@ -712,7 +712,7 @@ xfs_dir2_data_use_free(
 	ASSERT(be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG);
 	ASSERT(offset >= (char *)dup - (char *)d);
 	ASSERT(offset + len <= (char *)dup + be16_to_cpu(dup->length) - (char *)d);
-	ASSERT((char *)dup - (char *)d == be16_to_cpu(*XFS_DIR2_DATA_UNUSED_TAG_P(dup)));
+	ASSERT((char *)dup - (char *)d == be16_to_cpu(*xfs_dir2_data_unused_tag_p(dup)));
 	/*
 	 * Look up the entry in the bestfree table.
 	 */
@@ -745,7 +745,7 @@ xfs_dir2_data_use_free(
 		newdup = (xfs_dir2_data_unused_t *)((char *)d + offset + len);
 		newdup->freetag = cpu_to_be16(XFS_DIR2_DATA_FREE_TAG);
 		newdup->length = cpu_to_be16(oldlen - len);
-		*XFS_DIR2_DATA_UNUSED_TAG_P(newdup) =
+		*xfs_dir2_data_unused_tag_p(newdup) =
 			cpu_to_be16((char *)newdup - (char *)d);
 		xfs_dir2_data_log_unused(tp, bp, newdup);
 		/*
@@ -772,7 +772,7 @@ xfs_dir2_data_use_free(
 	else if (matchback) {
 		newdup = dup;
 		newdup->length = cpu_to_be16(((char *)d + offset) - (char *)newdup);
-		*XFS_DIR2_DATA_UNUSED_TAG_P(newdup) =
+		*xfs_dir2_data_unused_tag_p(newdup) =
 			cpu_to_be16((char *)newdup - (char *)d);
 		xfs_dir2_data_log_unused(tp, bp, newdup);
 		/*
@@ -799,13 +799,13 @@ xfs_dir2_data_use_free(
 	else {
 		newdup = dup;
 		newdup->length = cpu_to_be16(((char *)d + offset) - (char *)newdup);
-		*XFS_DIR2_DATA_UNUSED_TAG_P(newdup) =
+		*xfs_dir2_data_unused_tag_p(newdup) =
 			cpu_to_be16((char *)newdup - (char *)d);
 		xfs_dir2_data_log_unused(tp, bp, newdup);
 		newdup2 = (xfs_dir2_data_unused_t *)((char *)d + offset + len);
 		newdup2->freetag = cpu_to_be16(XFS_DIR2_DATA_FREE_TAG);
 		newdup2->length = cpu_to_be16(oldlen - len - be16_to_cpu(newdup->length));
-		*XFS_DIR2_DATA_UNUSED_TAG_P(newdup2) =
+		*xfs_dir2_data_unused_tag_p(newdup2) =
 			cpu_to_be16((char *)newdup2 - (char *)d);
 		xfs_dir2_data_log_unused(tp, bp, newdup2);
 		/*
diff --git a/fs/xfs/xfs_dir2_data.h b/fs/xfs/xfs_dir2_data.h
index c94c909..b816e02 100644
--- a/fs/xfs/xfs_dir2_data.h
+++ b/fs/xfs/xfs_dir2_data.h
@@ -44,7 +44,7 @@ struct xfs_trans;
 #define	XFS_DIR2_DATA_SPACE	0
 #define	XFS_DIR2_DATA_OFFSET	(XFS_DIR2_DATA_SPACE * XFS_DIR2_SPACE_SIZE)
 #define	XFS_DIR2_DATA_FIRSTDB(mp)	\
-	XFS_DIR2_BYTE_TO_DB(mp, XFS_DIR2_DATA_OFFSET)
+	xfs_dir2_byte_to_db(mp, XFS_DIR2_DATA_OFFSET)
 
 /*
  * Offsets of . and .. in data space (always block 0)
@@ -52,9 +52,9 @@ struct xfs_trans;
 #define	XFS_DIR2_DATA_DOT_OFFSET	\
 	((xfs_dir2_data_aoff_t)sizeof(xfs_dir2_data_hdr_t))
 #define	XFS_DIR2_DATA_DOTDOT_OFFSET	\
-	(XFS_DIR2_DATA_DOT_OFFSET + XFS_DIR2_DATA_ENTSIZE(1))
+	(XFS_DIR2_DATA_DOT_OFFSET + xfs_dir2_data_entsize(1))
 #define	XFS_DIR2_DATA_FIRST_OFFSET		\
-	(XFS_DIR2_DATA_DOTDOT_OFFSET + XFS_DIR2_DATA_ENTSIZE(2))
+	(XFS_DIR2_DATA_DOTDOT_OFFSET + xfs_dir2_data_entsize(2))
 
 /*
  * Structures.
@@ -123,7 +123,6 @@ typedef struct xfs_dir2_data {
 /*
  * Size of a data entry.
  */
-#define XFS_DIR2_DATA_ENTSIZE(n)	xfs_dir2_data_entsize(n)
 static inline int xfs_dir2_data_entsize(int n)
 {
 	return (int)roundup(offsetof(xfs_dir2_data_entry_t, name[0]) + (n) + \
@@ -133,19 +132,16 @@ static inline int xfs_dir2_data_entsize(int n)
 /*
  * Pointer to an entry's tag word.
  */
-#define	XFS_DIR2_DATA_ENTRY_TAG_P(dep)	xfs_dir2_data_entry_tag_p(dep)
 static inline __be16 *
 xfs_dir2_data_entry_tag_p(xfs_dir2_data_entry_t *dep)
 {
 	return (__be16 *)((char *)dep +
-		XFS_DIR2_DATA_ENTSIZE(dep->namelen) - sizeof(__be16));
+		xfs_dir2_data_entsize(dep->namelen) - sizeof(__be16));
 }
 
 /*
  * Pointer to a freespace's tag word.
  */
-#define	XFS_DIR2_DATA_UNUSED_TAG_P(dup) \
-	xfs_dir2_data_unused_tag_p(dup)
 static inline __be16 *
 xfs_dir2_data_unused_tag_p(xfs_dir2_data_unused_t *dup)
 {
diff --git a/fs/xfs/xfs_dir2_leaf.c b/fs/xfs/xfs_dir2_leaf.c
index db14ea7..1b73c9a 100644
--- a/fs/xfs/xfs_dir2_leaf.c
+++ b/fs/xfs/xfs_dir2_leaf.c
@@ -92,7 +92,7 @@ xfs_dir2_block_to_leaf(
 	if ((error = xfs_da_grow_inode(args, &blkno))) {
 		return error;
 	}
-	ldb = XFS_DIR2_DA_TO_DB(mp, blkno);
+	ldb = xfs_dir2_da_to_db(mp, blkno);
 	ASSERT(ldb == XFS_DIR2_LEAF_FIRSTDB(mp));
 	/*
 	 * Initialize the leaf block, get a buffer for it.
@@ -104,8 +104,8 @@ xfs_dir2_block_to_leaf(
 	leaf = lbp->data;
 	block = dbp->data;
 	xfs_dir2_data_check(dp, dbp);
-	btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
-	blp = XFS_DIR2_BLOCK_LEAF_P(btp);
+	btp = xfs_dir2_block_tail_p(mp, block);
+	blp = xfs_dir2_block_leaf_p(btp);
 	/*
 	 * Set the counts in the leaf header.
 	 */
@@ -137,9 +137,9 @@ xfs_dir2_block_to_leaf(
 	/*
 	 * Set up leaf tail and bests table.
 	 */
-	ltp = XFS_DIR2_LEAF_TAIL_P(mp, leaf);
+	ltp = xfs_dir2_leaf_tail_p(mp, leaf);
 	ltp->bestcount = cpu_to_be32(1);
-	bestsp = XFS_DIR2_LEAF_BESTS_P(ltp);
+	bestsp = xfs_dir2_leaf_bests_p(ltp);
 	bestsp[0] =  block->hdr.bestfree[0].length;
 	/*
 	 * Log the data header and leaf bests table.
@@ -209,9 +209,9 @@ xfs_dir2_leaf_addname(
 	 */
 	index = xfs_dir2_leaf_search_hash(args, lbp);
 	leaf = lbp->data;
-	ltp = XFS_DIR2_LEAF_TAIL_P(mp, leaf);
-	bestsp = XFS_DIR2_LEAF_BESTS_P(ltp);
-	length = XFS_DIR2_DATA_ENTSIZE(args->namelen);
+	ltp = xfs_dir2_leaf_tail_p(mp, leaf);
+	bestsp = xfs_dir2_leaf_bests_p(ltp);
+	length = xfs_dir2_data_entsize(args->namelen);
 	/*
 	 * See if there are any entries with the same hash value
 	 * and space in their block for the new entry.
@@ -223,7 +223,7 @@ xfs_dir2_leaf_addname(
 	     index++, lep++) {
 		if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR)
 			continue;
-		i = XFS_DIR2_DATAPTR_TO_DB(mp, be32_to_cpu(lep->address));
+		i = xfs_dir2_dataptr_to_db(mp, be32_to_cpu(lep->address));
 		ASSERT(i < be32_to_cpu(ltp->bestcount));
 		ASSERT(be16_to_cpu(bestsp[i]) != NULLDATAOFF);
 		if (be16_to_cpu(bestsp[i]) >= length) {
@@ -378,7 +378,7 @@ xfs_dir2_leaf_addname(
 	 */
 	else {
 		if ((error =
-		    xfs_da_read_buf(tp, dp, XFS_DIR2_DB_TO_DA(mp, use_block),
+		    xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, use_block),
 			    -1, &dbp, XFS_DATA_FORK))) {
 			xfs_da_brelse(tp, lbp);
 			return error;
@@ -407,7 +407,7 @@ xfs_dir2_leaf_addname(
 	dep->inumber = cpu_to_be64(args->inumber);
 	dep->namelen = args->namelen;
 	memcpy(dep->name, args->name, dep->namelen);
-	tagp = XFS_DIR2_DATA_ENTRY_TAG_P(dep);
+	tagp = xfs_dir2_data_entry_tag_p(dep);
 	*tagp = cpu_to_be16((char *)dep - (char *)data);
 	/*
 	 * Need to scan fix up the bestfree table.
@@ -529,7 +529,7 @@ xfs_dir2_leaf_addname(
 	 * Fill in the new leaf entry.
 	 */
 	lep->hashval = cpu_to_be32(args->hashval);
-	lep->address = cpu_to_be32(XFS_DIR2_DB_OFF_TO_DATAPTR(mp, use_block,
+	lep->address = cpu_to_be32(xfs_dir2_db_off_to_dataptr(mp, use_block,
 				be16_to_cpu(*tagp)));
 	/*
 	 * Log the leaf fields and give up the buffers.
@@ -567,13 +567,13 @@ xfs_dir2_leaf_check(
 	 * Should factor in the size of the bests table as well.
 	 * We can deduce a value for that from di_size.
 	 */
-	ASSERT(be16_to_cpu(leaf->hdr.count) <= XFS_DIR2_MAX_LEAF_ENTS(mp));
-	ltp = XFS_DIR2_LEAF_TAIL_P(mp, leaf);
+	ASSERT(be16_to_cpu(leaf->hdr.count) <= xfs_dir2_max_leaf_ents(mp));
+	ltp = xfs_dir2_leaf_tail_p(mp, leaf);
 	/*
 	 * Leaves and bests don't overlap.
 	 */
 	ASSERT((char *)&leaf->ents[be16_to_cpu(leaf->hdr.count)] <=
-	       (char *)XFS_DIR2_LEAF_BESTS_P(ltp));
+	       (char *)xfs_dir2_leaf_bests_p(ltp));
 	/*
 	 * Check hash value order, count stale entries.
 	 */
@@ -815,12 +815,12 @@ xfs_dir2_leaf_getdents(
 	 * Inside the loop we keep the main offset value as a byte offset
 	 * in the directory file.
 	 */
-	curoff = XFS_DIR2_DATAPTR_TO_BYTE(mp, uio->uio_offset);
+	curoff = xfs_dir2_dataptr_to_byte(mp, uio->uio_offset);
 	/*
 	 * Force this conversion through db so we truncate the offset
 	 * down to get the start of the data block.
 	 */
-	map_off = XFS_DIR2_DB_TO_DA(mp, XFS_DIR2_BYTE_TO_DB(mp, curoff));
+	map_off = xfs_dir2_db_to_da(mp, xfs_dir2_byte_to_db(mp, curoff));
 	/*
 	 * Loop over directory entries until we reach the end offset.
 	 * Get more blocks and readahead as necessary.
@@ -870,7 +870,7 @@ xfs_dir2_leaf_getdents(
 			 */
 			if (1 + ra_want > map_blocks &&
 			    map_off <
-			    XFS_DIR2_BYTE_TO_DA(mp, XFS_DIR2_LEAF_OFFSET)) {
+			    xfs_dir2_byte_to_da(mp, XFS_DIR2_LEAF_OFFSET)) {
 				/*
 				 * Get more bmaps, fill in after the ones
 				 * we already have in the table.
@@ -878,7 +878,7 @@ xfs_dir2_leaf_getdents(
 				nmap = map_size - map_valid;
 				error = xfs_bmapi(tp, dp,
 					map_off,
-					XFS_DIR2_BYTE_TO_DA(mp,
+					xfs_dir2_byte_to_da(mp,
 						XFS_DIR2_LEAF_OFFSET) - map_off,
 					XFS_BMAPI_METADATA, NULL, 0,
 					&map[map_valid], &nmap, NULL, NULL);
@@ -903,7 +903,7 @@ xfs_dir2_leaf_getdents(
 					map[map_valid + nmap - 1].br_blockcount;
 				else
 					map_off =
-						XFS_DIR2_BYTE_TO_DA(mp,
+						xfs_dir2_byte_to_da(mp,
 							XFS_DIR2_LEAF_OFFSET);
 				/*
 				 * Look for holes in the mapping, and
@@ -931,14 +931,14 @@ xfs_dir2_leaf_getdents(
 			 * No valid mappings, so no more data blocks.
 			 */
 			if (!map_valid) {
-				curoff = XFS_DIR2_DA_TO_BYTE(mp, map_off);
+				curoff = xfs_dir2_da_to_byte(mp, map_off);
 				break;
 			}
 			/*
 			 * Read the directory block starting at the first
 			 * mapping.
 			 */
-			curdb = XFS_DIR2_DA_TO_DB(mp, map->br_startoff);
+			curdb = xfs_dir2_da_to_db(mp, map->br_startoff);
 			error = xfs_da_read_buf(tp, dp, map->br_startoff,
 				map->br_blockcount >= mp->m_dirblkfsbs ?
 				    XFS_FSB_TO_DADDR(mp, map->br_startblock) :
@@ -1014,7 +1014,7 @@ xfs_dir2_leaf_getdents(
 			/*
 			 * Having done a read, we need to set a new offset.
 			 */
-			newoff = XFS_DIR2_DB_OFF_TO_BYTE(mp, curdb, 0);
+			newoff = xfs_dir2_db_off_to_byte(mp, curdb, 0);
 			/*
 			 * Start of the current block.
 			 */
@@ -1024,7 +1024,7 @@ xfs_dir2_leaf_getdents(
 			 * Make sure we're in the right block.
 			 */
 			else if (curoff > newoff)
-				ASSERT(XFS_DIR2_BYTE_TO_DB(mp, curoff) ==
+				ASSERT(xfs_dir2_byte_to_db(mp, curoff) ==
 				       curdb);
 			data = bp->data;
 			xfs_dir2_data_check(dp, bp);
@@ -1032,7 +1032,7 @@ xfs_dir2_leaf_getdents(
 			 * Find our position in the block.
 			 */
 			ptr = (char *)&data->u;
-			byteoff = XFS_DIR2_BYTE_TO_OFF(mp, curoff);
+			byteoff = xfs_dir2_byte_to_off(mp, curoff);
 			/*
 			 * Skip past the header.
 			 */
@@ -1054,15 +1054,15 @@ xfs_dir2_leaf_getdents(
 					}
 					dep = (xfs_dir2_data_entry_t *)ptr;
 					length =
-					   XFS_DIR2_DATA_ENTSIZE(dep->namelen);
+					   xfs_dir2_data_entsize(dep->namelen);
 					ptr += length;
 				}
 				/*
 				 * Now set our real offset.
 				 */
 				curoff =
-					XFS_DIR2_DB_OFF_TO_BYTE(mp,
-					    XFS_DIR2_BYTE_TO_DB(mp, curoff),
+					xfs_dir2_db_off_to_byte(mp,
+					    xfs_dir2_byte_to_db(mp, curoff),
 					    (char *)ptr - (char *)data);
 				if (ptr >= (char *)data + mp->m_dirblksize) {
 					continue;
@@ -1091,9 +1091,9 @@ xfs_dir2_leaf_getdents(
 
 		p->namelen = dep->namelen;
 
-		length = XFS_DIR2_DATA_ENTSIZE(p->namelen);
+		length = xfs_dir2_data_entsize(p->namelen);
 
-		p->cook = XFS_DIR2_BYTE_TO_DATAPTR(mp, curoff + length);
+		p->cook = xfs_dir2_byte_to_dataptr(mp, curoff + length);
 
 		p->ino = be64_to_cpu(dep->inumber);
 #if XFS_BIG_INUMS
@@ -1121,10 +1121,10 @@ xfs_dir2_leaf_getdents(
 	 * All done.  Set output offset value to current offset.
 	 */
 	*eofp = eof;
-	if (curoff > XFS_DIR2_DATAPTR_TO_BYTE(mp, XFS_DIR2_MAX_DATAPTR))
+	if (curoff > xfs_dir2_dataptr_to_byte(mp, XFS_DIR2_MAX_DATAPTR))
 		uio->uio_offset = XFS_DIR2_MAX_DATAPTR;
 	else
-		uio->uio_offset = XFS_DIR2_BYTE_TO_DATAPTR(mp, curoff);
+		uio->uio_offset = xfs_dir2_byte_to_dataptr(mp, curoff);
 	kmem_free(map, map_size * sizeof(*map));
 	kmem_free(p, sizeof(*p));
 	if (bp)
@@ -1159,7 +1159,7 @@ xfs_dir2_leaf_init(
 	/*
 	 * Get the buffer for the block.
 	 */
-	error = xfs_da_get_buf(tp, dp, XFS_DIR2_DB_TO_DA(mp, bno), -1, &bp,
+	error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, bno), -1, &bp,
 		XFS_DATA_FORK);
 	if (error) {
 		return error;
@@ -1181,7 +1181,7 @@ xfs_dir2_leaf_init(
 	 * the block.
 	 */
 	if (magic == XFS_DIR2_LEAF1_MAGIC) {
-		ltp = XFS_DIR2_LEAF_TAIL_P(mp, leaf);
+		ltp = xfs_dir2_leaf_tail_p(mp, leaf);
 		ltp->bestcount = 0;
 		xfs_dir2_leaf_log_tail(tp, bp);
 	}
@@ -1206,9 +1206,9 @@ xfs_dir2_leaf_log_bests(
 
 	leaf = bp->data;
 	ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAF1_MAGIC);
-	ltp = XFS_DIR2_LEAF_TAIL_P(tp->t_mountp, leaf);
-	firstb = XFS_DIR2_LEAF_BESTS_P(ltp) + first;
-	lastb = XFS_DIR2_LEAF_BESTS_P(ltp) + last;
+	ltp = xfs_dir2_leaf_tail_p(tp->t_mountp, leaf);
+	firstb = xfs_dir2_leaf_bests_p(ltp) + first;
+	lastb = xfs_dir2_leaf_bests_p(ltp) + last;
 	xfs_da_log_buf(tp, bp, (uint)((char *)firstb - (char *)leaf),
 		(uint)((char *)lastb - (char *)leaf + sizeof(*lastb) - 1));
 }
@@ -1268,7 +1268,7 @@ xfs_dir2_leaf_log_tail(
 	mp = tp->t_mountp;
 	leaf = bp->data;
 	ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAF1_MAGIC);
-	ltp = XFS_DIR2_LEAF_TAIL_P(mp, leaf);
+	ltp = xfs_dir2_leaf_tail_p(mp, leaf);
 	xfs_da_log_buf(tp, bp, (uint)((char *)ltp - (char *)leaf),
 		(uint)(mp->m_dirblksize - 1));
 }
@@ -1312,7 +1312,7 @@ xfs_dir2_leaf_lookup(
 	 */
 	dep = (xfs_dir2_data_entry_t *)
 	      ((char *)dbp->data +
-	       XFS_DIR2_DATAPTR_TO_OFF(dp->i_mount, be32_to_cpu(lep->address)));
+	       xfs_dir2_dataptr_to_off(dp->i_mount, be32_to_cpu(lep->address)));
 	/*
 	 * Return the found inode number.
 	 */
@@ -1381,7 +1381,7 @@ xfs_dir2_leaf_lookup_int(
 		/*
 		 * Get the new data block number.
 		 */
-		newdb = XFS_DIR2_DATAPTR_TO_DB(mp, be32_to_cpu(lep->address));
+		newdb = xfs_dir2_dataptr_to_db(mp, be32_to_cpu(lep->address));
 		/*
 		 * If it's not the same as the old data block number,
 		 * need to pitch the old one and read the new one.
@@ -1391,7 +1391,7 @@ xfs_dir2_leaf_lookup_int(
 				xfs_da_brelse(tp, dbp);
 			if ((error =
 			    xfs_da_read_buf(tp, dp,
-				    XFS_DIR2_DB_TO_DA(mp, newdb), -1, &dbp,
+				    xfs_dir2_db_to_da(mp, newdb), -1, &dbp,
 				    XFS_DATA_FORK))) {
 				xfs_da_brelse(tp, lbp);
 				return error;
@@ -1404,7 +1404,7 @@ xfs_dir2_leaf_lookup_int(
 		 */
 		dep = (xfs_dir2_data_entry_t *)
 		      ((char *)dbp->data +
-		       XFS_DIR2_DATAPTR_TO_OFF(mp, be32_to_cpu(lep->address)));
+		       xfs_dir2_dataptr_to_off(mp, be32_to_cpu(lep->address)));
 		/*
 		 * If it matches then return it.
 		 */
@@ -1469,20 +1469,20 @@ xfs_dir2_leaf_removename(
 	 * Point to the leaf entry, use that to point to the data entry.
 	 */
 	lep = &leaf->ents[index];
-	db = XFS_DIR2_DATAPTR_TO_DB(mp, be32_to_cpu(lep->address));
+	db = xfs_dir2_dataptr_to_db(mp, be32_to_cpu(lep->address));
 	dep = (xfs_dir2_data_entry_t *)
-	      ((char *)data + XFS_DIR2_DATAPTR_TO_OFF(mp, be32_to_cpu(lep->address)));
+	      ((char *)data + xfs_dir2_dataptr_to_off(mp, be32_to_cpu(lep->address)));
 	needscan = needlog = 0;
 	oldbest = be16_to_cpu(data->hdr.bestfree[0].length);
-	ltp = XFS_DIR2_LEAF_TAIL_P(mp, leaf);
-	bestsp = XFS_DIR2_LEAF_BESTS_P(ltp);
+	ltp = xfs_dir2_leaf_tail_p(mp, leaf);
+	bestsp = xfs_dir2_leaf_bests_p(ltp);
 	ASSERT(be16_to_cpu(bestsp[db]) == oldbest);
 	/*
 	 * Mark the former data entry unused.
 	 */
 	xfs_dir2_data_make_free(tp, dbp,
 		(xfs_dir2_data_aoff_t)((char *)dep - (char *)data),
-		XFS_DIR2_DATA_ENTSIZE(dep->namelen), &needlog, &needscan);
+		xfs_dir2_data_entsize(dep->namelen), &needlog, &needscan);
 	/*
 	 * We just mark the leaf entry stale by putting a null in it.
 	 */
@@ -1602,7 +1602,7 @@ xfs_dir2_leaf_replace(
 	 */
 	dep = (xfs_dir2_data_entry_t *)
 	      ((char *)dbp->data +
-	       XFS_DIR2_DATAPTR_TO_OFF(dp->i_mount, be32_to_cpu(lep->address)));
+	       xfs_dir2_dataptr_to_off(dp->i_mount, be32_to_cpu(lep->address)));
 	ASSERT(args->inumber != be64_to_cpu(dep->inumber));
 	/*
 	 * Put the new inode number in, log it.
@@ -1698,7 +1698,7 @@ xfs_dir2_leaf_trim_data(
 	/*
 	 * Read the offending data block.  We need its buffer.
 	 */
-	if ((error = xfs_da_read_buf(tp, dp, XFS_DIR2_DB_TO_DA(mp, db), -1, &dbp,
+	if ((error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, db), -1, &dbp,
 			XFS_DATA_FORK))) {
 		return error;
 	}
@@ -1712,7 +1712,7 @@ xfs_dir2_leaf_trim_data(
 	 */
 
 	leaf = lbp->data;
-	ltp = XFS_DIR2_LEAF_TAIL_P(mp, leaf);
+	ltp = xfs_dir2_leaf_tail_p(mp, leaf);
 	ASSERT(be16_to_cpu(data->hdr.bestfree[0].length) ==
 	       mp->m_dirblksize - (uint)sizeof(data->hdr));
 	ASSERT(db == be32_to_cpu(ltp->bestcount) - 1);
@@ -1727,7 +1727,7 @@ xfs_dir2_leaf_trim_data(
 	/*
 	 * Eliminate the last bests entry from the table.
 	 */
-	bestsp = XFS_DIR2_LEAF_BESTS_P(ltp);
+	bestsp = xfs_dir2_leaf_bests_p(ltp);
 	be32_add(&ltp->bestcount, -1);
 	memmove(&bestsp[1], &bestsp[0], be32_to_cpu(ltp->bestcount) * sizeof(*bestsp));
 	xfs_dir2_leaf_log_tail(tp, lbp);
@@ -1838,12 +1838,12 @@ xfs_dir2_node_to_leaf(
 	/*
 	 * Set up the leaf tail from the freespace block.
 	 */
-	ltp = XFS_DIR2_LEAF_TAIL_P(mp, leaf);
+	ltp = xfs_dir2_leaf_tail_p(mp, leaf);
 	ltp->bestcount = free->hdr.nvalid;
 	/*
 	 * Set up the leaf bests table.
 	 */
-	memcpy(XFS_DIR2_LEAF_BESTS_P(ltp), free->bests,
+	memcpy(xfs_dir2_leaf_bests_p(ltp), free->bests,
 		be32_to_cpu(ltp->bestcount) * sizeof(leaf->bests[0]));
 	xfs_dir2_leaf_log_bests(tp, lbp, 0, be32_to_cpu(ltp->bestcount) - 1);
 	xfs_dir2_leaf_log_tail(tp, lbp);
diff --git a/fs/xfs/xfs_dir2_leaf.h b/fs/xfs/xfs_dir2_leaf.h
index f57ca116..70c97f3 100644
--- a/fs/xfs/xfs_dir2_leaf.h
+++ b/fs/xfs/xfs_dir2_leaf.h
@@ -32,7 +32,7 @@ struct xfs_trans;
 #define	XFS_DIR2_LEAF_SPACE	1
 #define	XFS_DIR2_LEAF_OFFSET	(XFS_DIR2_LEAF_SPACE * XFS_DIR2_SPACE_SIZE)
 #define	XFS_DIR2_LEAF_FIRSTDB(mp)	\
-	XFS_DIR2_BYTE_TO_DB(mp, XFS_DIR2_LEAF_OFFSET)
+	xfs_dir2_byte_to_db(mp, XFS_DIR2_LEAF_OFFSET)
 
 /*
  * Offset in data space of a data entry.
@@ -82,7 +82,6 @@ typedef struct xfs_dir2_leaf {
  * DB blocks here are logical directory block numbers, not filesystem blocks.
  */
 
-#define	XFS_DIR2_MAX_LEAF_ENTS(mp)	xfs_dir2_max_leaf_ents(mp)
 static inline int xfs_dir2_max_leaf_ents(struct xfs_mount *mp)
 {
 	return (int)(((mp)->m_dirblksize - (uint)sizeof(xfs_dir2_leaf_hdr_t)) /
@@ -92,7 +91,6 @@ static inline int xfs_dir2_max_leaf_ents(struct xfs_mount *mp)
 /*
  * Get address of the bestcount field in the single-leaf block.
  */
-#define	XFS_DIR2_LEAF_TAIL_P(mp,lp)	xfs_dir2_leaf_tail_p(mp, lp)
 static inline xfs_dir2_leaf_tail_t *
 xfs_dir2_leaf_tail_p(struct xfs_mount *mp, xfs_dir2_leaf_t *lp)
 {
@@ -104,7 +102,6 @@ xfs_dir2_leaf_tail_p(struct xfs_mount *mp, xfs_dir2_leaf_t *lp)
 /*
  * Get address of the bests array in the single-leaf block.
  */
-#define	XFS_DIR2_LEAF_BESTS_P(ltp)	xfs_dir2_leaf_bests_p(ltp)
 static inline __be16 *
 xfs_dir2_leaf_bests_p(xfs_dir2_leaf_tail_t *ltp)
 {
@@ -114,7 +111,6 @@ xfs_dir2_leaf_bests_p(xfs_dir2_leaf_tail_t *ltp)
 /*
  * Convert dataptr to byte in file space
  */
-#define	XFS_DIR2_DATAPTR_TO_BYTE(mp,dp)	xfs_dir2_dataptr_to_byte(mp, dp)
 static inline xfs_dir2_off_t
 xfs_dir2_dataptr_to_byte(struct xfs_mount *mp, xfs_dir2_dataptr_t dp)
 {
@@ -124,7 +120,6 @@ xfs_dir2_dataptr_to_byte(struct xfs_mount *mp, xfs_dir2_dataptr_t dp)
 /*
  * Convert byte in file space to dataptr.  It had better be aligned.
  */
-#define	XFS_DIR2_BYTE_TO_DATAPTR(mp,by)	xfs_dir2_byte_to_dataptr(mp,by)
 static inline xfs_dir2_dataptr_t
 xfs_dir2_byte_to_dataptr(struct xfs_mount *mp, xfs_dir2_off_t by)
 {
@@ -134,7 +129,6 @@ xfs_dir2_byte_to_dataptr(struct xfs_mount *mp, xfs_dir2_off_t by)
 /*
  * Convert byte in space to (DB) block
  */
-#define	XFS_DIR2_BYTE_TO_DB(mp,by)	xfs_dir2_byte_to_db(mp, by)
 static inline xfs_dir2_db_t
 xfs_dir2_byte_to_db(struct xfs_mount *mp, xfs_dir2_off_t by)
 {
@@ -145,17 +139,15 @@ xfs_dir2_byte_to_db(struct xfs_mount *mp, xfs_dir2_off_t by)
 /*
  * Convert dataptr to a block number
  */
-#define	XFS_DIR2_DATAPTR_TO_DB(mp,dp)	xfs_dir2_dataptr_to_db(mp, dp)
 static inline xfs_dir2_db_t
 xfs_dir2_dataptr_to_db(struct xfs_mount *mp, xfs_dir2_dataptr_t dp)
 {
-	return XFS_DIR2_BYTE_TO_DB(mp, XFS_DIR2_DATAPTR_TO_BYTE(mp, dp));
+	return xfs_dir2_byte_to_db(mp, xfs_dir2_dataptr_to_byte(mp, dp));
 }
 
 /*
  * Convert byte in space to offset in a block
  */
-#define	XFS_DIR2_BYTE_TO_OFF(mp,by)	xfs_dir2_byte_to_off(mp, by)
 static inline xfs_dir2_data_aoff_t
 xfs_dir2_byte_to_off(struct xfs_mount *mp, xfs_dir2_off_t by)
 {
@@ -166,18 +158,15 @@ xfs_dir2_byte_to_off(struct xfs_mount *mp, xfs_dir2_off_t by)
 /*
  * Convert dataptr to a byte offset in a block
  */
-#define	XFS_DIR2_DATAPTR_TO_OFF(mp,dp)	xfs_dir2_dataptr_to_off(mp, dp)
 static inline xfs_dir2_data_aoff_t
 xfs_dir2_dataptr_to_off(struct xfs_mount *mp, xfs_dir2_dataptr_t dp)
 {
-	return XFS_DIR2_BYTE_TO_OFF(mp, XFS_DIR2_DATAPTR_TO_BYTE(mp, dp));
+	return xfs_dir2_byte_to_off(mp, xfs_dir2_dataptr_to_byte(mp, dp));
 }
 
 /*
  * Convert block and offset to byte in space
  */
-#define	XFS_DIR2_DB_OFF_TO_BYTE(mp,db,o)	\
-	xfs_dir2_db_off_to_byte(mp, db, o)
 static inline xfs_dir2_off_t
 xfs_dir2_db_off_to_byte(struct xfs_mount *mp, xfs_dir2_db_t db,
 			xfs_dir2_data_aoff_t o)
@@ -189,7 +178,6 @@ xfs_dir2_db_off_to_byte(struct xfs_mount *mp, xfs_dir2_db_t db,
 /*
  * Convert block (DB) to block (dablk)
  */
-#define	XFS_DIR2_DB_TO_DA(mp,db)	xfs_dir2_db_to_da(mp, db)
 static inline xfs_dablk_t
 xfs_dir2_db_to_da(struct xfs_mount *mp, xfs_dir2_db_t db)
 {
@@ -199,29 +187,25 @@ xfs_dir2_db_to_da(struct xfs_mount *mp, xfs_dir2_db_t db)
 /*
  * Convert byte in space to (DA) block
  */
-#define	XFS_DIR2_BYTE_TO_DA(mp,by)	xfs_dir2_byte_to_da(mp, by)
 static inline xfs_dablk_t
 xfs_dir2_byte_to_da(struct xfs_mount *mp, xfs_dir2_off_t by)
 {
-	return XFS_DIR2_DB_TO_DA(mp, XFS_DIR2_BYTE_TO_DB(mp, by));
+	return xfs_dir2_db_to_da(mp, xfs_dir2_byte_to_db(mp, by));
 }
 
 /*
  * Convert block and offset to dataptr
  */
-#define	XFS_DIR2_DB_OFF_TO_DATAPTR(mp,db,o)	\
-	xfs_dir2_db_off_to_dataptr(mp, db, o)
 static inline xfs_dir2_dataptr_t
 xfs_dir2_db_off_to_dataptr(struct xfs_mount *mp, xfs_dir2_db_t db,
 			   xfs_dir2_data_aoff_t o)
 {
-	return XFS_DIR2_BYTE_TO_DATAPTR(mp, XFS_DIR2_DB_OFF_TO_BYTE(mp, db, o));
+	return xfs_dir2_byte_to_dataptr(mp, xfs_dir2_db_off_to_byte(mp, db, o));
 }
 
 /*
  * Convert block (dablk) to block (DB)
  */
-#define	XFS_DIR2_DA_TO_DB(mp,da)	xfs_dir2_da_to_db(mp, da)
 static inline xfs_dir2_db_t
 xfs_dir2_da_to_db(struct xfs_mount *mp, xfs_dablk_t da)
 {
@@ -231,11 +215,10 @@ xfs_dir2_da_to_db(struct xfs_mount *mp, xfs_dablk_t da)
 /*
  * Convert block (dablk) to byte offset in space
  */
-#define XFS_DIR2_DA_TO_BYTE(mp,da)	xfs_dir2_da_to_byte(mp, da)
 static inline xfs_dir2_off_t
 xfs_dir2_da_to_byte(struct xfs_mount *mp, xfs_dablk_t da)
 {
-	return XFS_DIR2_DB_OFF_TO_BYTE(mp, XFS_DIR2_DA_TO_DB(mp, da), 0);
+	return xfs_dir2_db_off_to_byte(mp, xfs_dir2_da_to_db(mp, da), 0);
 }
 
 /*
diff --git a/fs/xfs/xfs_dir2_node.c b/fs/xfs/xfs_dir2_node.c
index d083c38..91c61d9 100644
--- a/fs/xfs/xfs_dir2_node.c
+++ b/fs/xfs/xfs_dir2_node.c
@@ -136,14 +136,14 @@ xfs_dir2_leaf_to_node(
 	/*
 	 * Get the buffer for the new freespace block.
 	 */
-	if ((error = xfs_da_get_buf(tp, dp, XFS_DIR2_DB_TO_DA(mp, fdb), -1, &fbp,
+	if ((error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, fdb), -1, &fbp,
 			XFS_DATA_FORK))) {
 		return error;
 	}
 	ASSERT(fbp != NULL);
 	free = fbp->data;
 	leaf = lbp->data;
-	ltp = XFS_DIR2_LEAF_TAIL_P(mp, leaf);
+	ltp = xfs_dir2_leaf_tail_p(mp, leaf);
 	/*
 	 * Initialize the freespace block header.
 	 */
@@ -155,7 +155,7 @@ xfs_dir2_leaf_to_node(
 	 * Copy freespace entries from the leaf block to the new block.
 	 * Count active entries.
 	 */
-	for (i = n = 0, from = XFS_DIR2_LEAF_BESTS_P(ltp), to = free->bests;
+	for (i = n = 0, from = xfs_dir2_leaf_bests_p(ltp), to = free->bests;
 	     i < be32_to_cpu(ltp->bestcount); i++, from++, to++) {
 		if ((off = be16_to_cpu(*from)) != NULLDATAOFF)
 			n++;
@@ -215,7 +215,7 @@ xfs_dir2_leafn_add(
 	 * a compact.
 	 */
 
-	if (be16_to_cpu(leaf->hdr.count) == XFS_DIR2_MAX_LEAF_ENTS(mp)) {
+	if (be16_to_cpu(leaf->hdr.count) == xfs_dir2_max_leaf_ents(mp)) {
 		if (!leaf->hdr.stale)
 			return XFS_ERROR(ENOSPC);
 		compact = be16_to_cpu(leaf->hdr.stale) > 1;
@@ -327,7 +327,7 @@ xfs_dir2_leafn_add(
 	 * Insert the new entry, log everything.
 	 */
 	lep->hashval = cpu_to_be32(args->hashval);
-	lep->address = cpu_to_be32(XFS_DIR2_DB_OFF_TO_DATAPTR(mp,
+	lep->address = cpu_to_be32(xfs_dir2_db_off_to_dataptr(mp,
 				args->blkno, args->index));
 	xfs_dir2_leaf_log_header(tp, bp);
 	xfs_dir2_leaf_log_ents(tp, bp, lfloglow, lfloghigh);
@@ -352,7 +352,7 @@ xfs_dir2_leafn_check(
 	leaf = bp->data;
 	mp = dp->i_mount;
 	ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR2_LEAFN_MAGIC);
-	ASSERT(be16_to_cpu(leaf->hdr.count) <= XFS_DIR2_MAX_LEAF_ENTS(mp));
+	ASSERT(be16_to_cpu(leaf->hdr.count) <= xfs_dir2_max_leaf_ents(mp));
 	for (i = stale = 0; i < be16_to_cpu(leaf->hdr.count); i++) {
 		if (i + 1 < be16_to_cpu(leaf->hdr.count)) {
 			ASSERT(be32_to_cpu(leaf->ents[i].hashval) <=
@@ -440,7 +440,7 @@ xfs_dir2_leafn_lookup_int(
 	if (args->addname) {
 		curfdb = curbp ? state->extrablk.blkno : -1;
 		curdb = -1;
-		length = XFS_DIR2_DATA_ENTSIZE(args->namelen);
+		length = xfs_dir2_data_entsize(args->namelen);
 		if ((free = (curbp ? curbp->data : NULL)))
 			ASSERT(be32_to_cpu(free->hdr.magic) == XFS_DIR2_FREE_MAGIC);
 	}
@@ -465,7 +465,7 @@ xfs_dir2_leafn_lookup_int(
 		/*
 		 * Pull the data block number from the entry.
 		 */
-		newdb = XFS_DIR2_DATAPTR_TO_DB(mp, be32_to_cpu(lep->address));
+		newdb = xfs_dir2_dataptr_to_db(mp, be32_to_cpu(lep->address));
 		/*
 		 * For addname, we're looking for a place to put the new entry.
 		 * We want to use a data block with an entry of equal
@@ -482,7 +482,7 @@ xfs_dir2_leafn_lookup_int(
 				 * Convert the data block to the free block
 				 * holding its freespace information.
 				 */
-				newfdb = XFS_DIR2_DB_TO_FDB(mp, newdb);
+				newfdb = xfs_dir2_db_to_fdb(mp, newdb);
 				/*
 				 * If it's not the one we have in hand,
 				 * read it in.
@@ -497,7 +497,7 @@ xfs_dir2_leafn_lookup_int(
 					 * Read the free block.
 					 */
 					if ((error = xfs_da_read_buf(tp, dp,
-							XFS_DIR2_DB_TO_DA(mp,
+							xfs_dir2_db_to_da(mp,
 								newfdb),
 							-1, &curbp,
 							XFS_DATA_FORK))) {
@@ -517,7 +517,7 @@ xfs_dir2_leafn_lookup_int(
 				/*
 				 * Get the index for our entry.
 				 */
-				fi = XFS_DIR2_DB_TO_FDINDEX(mp, curdb);
+				fi = xfs_dir2_db_to_fdindex(mp, curdb);
 				/*
 				 * If it has room, return it.
 				 */
@@ -561,7 +561,7 @@ xfs_dir2_leafn_lookup_int(
 				 */
 				if ((error =
 				    xfs_da_read_buf(tp, dp,
-					    XFS_DIR2_DB_TO_DA(mp, newdb), -1,
+					    xfs_dir2_db_to_da(mp, newdb), -1,
 					    &curbp, XFS_DATA_FORK))) {
 					return error;
 				}
@@ -573,7 +573,7 @@ xfs_dir2_leafn_lookup_int(
 			 */
 			dep = (xfs_dir2_data_entry_t *)
 			      ((char *)curbp->data +
-			       XFS_DIR2_DATAPTR_TO_OFF(mp, be32_to_cpu(lep->address)));
+			       xfs_dir2_dataptr_to_off(mp, be32_to_cpu(lep->address)));
 			/*
 			 * Compare the entry, return it if it matches.
 			 */
@@ -876,9 +876,9 @@ xfs_dir2_leafn_remove(
 	/*
 	 * Extract the data block and offset from the entry.
 	 */
-	db = XFS_DIR2_DATAPTR_TO_DB(mp, be32_to_cpu(lep->address));
+	db = xfs_dir2_dataptr_to_db(mp, be32_to_cpu(lep->address));
 	ASSERT(dblk->blkno == db);
-	off = XFS_DIR2_DATAPTR_TO_OFF(mp, be32_to_cpu(lep->address));
+	off = xfs_dir2_dataptr_to_off(mp, be32_to_cpu(lep->address));
 	ASSERT(dblk->index == off);
 	/*
 	 * Kill the leaf entry by marking it stale.
@@ -898,7 +898,7 @@ xfs_dir2_leafn_remove(
 	longest = be16_to_cpu(data->hdr.bestfree[0].length);
 	needlog = needscan = 0;
 	xfs_dir2_data_make_free(tp, dbp, off,
-		XFS_DIR2_DATA_ENTSIZE(dep->namelen), &needlog, &needscan);
+		xfs_dir2_data_entsize(dep->namelen), &needlog, &needscan);
 	/*
 	 * Rescan the data block freespaces for bestfree.
 	 * Log the data block header if needed.
@@ -924,8 +924,8 @@ xfs_dir2_leafn_remove(
 		 * Convert the data block number to a free block,
 		 * read in the free block.
 		 */
-		fdb = XFS_DIR2_DB_TO_FDB(mp, db);
-		if ((error = xfs_da_read_buf(tp, dp, XFS_DIR2_DB_TO_DA(mp, fdb),
+		fdb = xfs_dir2_db_to_fdb(mp, db);
+		if ((error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, fdb),
 				-1, &fbp, XFS_DATA_FORK))) {
 			return error;
 		}
@@ -937,7 +937,7 @@ xfs_dir2_leafn_remove(
 		/*
 		 * Calculate which entry we need to fix.
 		 */
-		findex = XFS_DIR2_DB_TO_FDINDEX(mp, db);
+		findex = xfs_dir2_db_to_fdindex(mp, db);
 		longest = be16_to_cpu(data->hdr.bestfree[0].length);
 		/*
 		 * If the data block is now empty we can get rid of it
@@ -1073,7 +1073,7 @@ xfs_dir2_leafn_split(
 	/*
 	 * Initialize the new leaf block.
 	 */
-	error = xfs_dir2_leaf_init(args, XFS_DIR2_DA_TO_DB(mp, blkno),
+	error = xfs_dir2_leaf_init(args, xfs_dir2_da_to_db(mp, blkno),
 		&newblk->bp, XFS_DIR2_LEAFN_MAGIC);
 	if (error) {
 		return error;
@@ -1385,7 +1385,7 @@ xfs_dir2_node_addname_int(
 	dp = args->dp;
 	mp = dp->i_mount;
 	tp = args->trans;
-	length = XFS_DIR2_DATA_ENTSIZE(args->namelen);
+	length = xfs_dir2_data_entsize(args->namelen);
 	/*
 	 * If we came in with a freespace block that means that lookup
 	 * found an entry with our hash value.  This is the freespace
@@ -1438,7 +1438,7 @@ xfs_dir2_node_addname_int(
 
 		if ((error = xfs_bmap_last_offset(tp, dp, &fo, XFS_DATA_FORK)))
 			return error;
-		lastfbno = XFS_DIR2_DA_TO_DB(mp, (xfs_dablk_t)fo);
+		lastfbno = xfs_dir2_da_to_db(mp, (xfs_dablk_t)fo);
 		fbno = ifbno;
 	}
 	/*
@@ -1474,7 +1474,7 @@ xfs_dir2_node_addname_int(
 			 * to avoid it.
 			 */
 			if ((error = xfs_da_read_buf(tp, dp,
-					XFS_DIR2_DB_TO_DA(mp, fbno), -2, &fbp,
+					xfs_dir2_db_to_da(mp, fbno), -2, &fbp,
 					XFS_DATA_FORK))) {
 				return error;
 			}
@@ -1550,9 +1550,9 @@ xfs_dir2_node_addname_int(
 		 * Get the freespace block corresponding to the data block
 		 * that was just allocated.
 		 */
-		fbno = XFS_DIR2_DB_TO_FDB(mp, dbno);
+		fbno = xfs_dir2_db_to_fdb(mp, dbno);
 		if (unlikely(error = xfs_da_read_buf(tp, dp,
-				XFS_DIR2_DB_TO_DA(mp, fbno), -2, &fbp,
+				xfs_dir2_db_to_da(mp, fbno), -2, &fbp,
 				XFS_DATA_FORK))) {
 			xfs_da_buf_done(dbp);
 			return error;
@@ -1567,14 +1567,14 @@ xfs_dir2_node_addname_int(
 				return error;
 			}
 
-			if (unlikely(XFS_DIR2_DB_TO_FDB(mp, dbno) != fbno)) {
+			if (unlikely(xfs_dir2_db_to_fdb(mp, dbno) != fbno)) {
 				cmn_err(CE_ALERT,
 					"xfs_dir2_node_addname_int: dir ino "
 					"%llu needed freesp block %lld for\n"
 					"  data block %lld, got %lld\n"
 					"  ifbno %llu lastfbno %d\n",
 					(unsigned long long)dp->i_ino,
-					(long long)XFS_DIR2_DB_TO_FDB(mp, dbno),
+					(long long)xfs_dir2_db_to_fdb(mp, dbno),
 					(long long)dbno, (long long)fbno,
 					(unsigned long long)ifbno, lastfbno);
 				if (fblk) {
@@ -1598,7 +1598,7 @@ xfs_dir2_node_addname_int(
 			 * Get a buffer for the new block.
 			 */
 			if ((error = xfs_da_get_buf(tp, dp,
-						   XFS_DIR2_DB_TO_DA(mp, fbno),
+						   xfs_dir2_db_to_da(mp, fbno),
 						   -1, &fbp, XFS_DATA_FORK))) {
 				return error;
 			}
@@ -1623,7 +1623,7 @@ xfs_dir2_node_addname_int(
 		/*
 		 * Set the freespace block index from the data block number.
 		 */
-		findex = XFS_DIR2_DB_TO_FDINDEX(mp, dbno);
+		findex = xfs_dir2_db_to_fdindex(mp, dbno);
 		/*
 		 * If it's after the end of the current entries in the
 		 * freespace block, extend that table.
@@ -1669,7 +1669,7 @@ xfs_dir2_node_addname_int(
 		 * Read the data block in.
 		 */
 		if (unlikely(
-		    error = xfs_da_read_buf(tp, dp, XFS_DIR2_DB_TO_DA(mp, dbno),
+		    error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, dbno),
 				-1, &dbp, XFS_DATA_FORK))) {
 			if ((fblk == NULL || fblk->bp == NULL) && fbp != NULL)
 				xfs_da_buf_done(fbp);
@@ -1698,7 +1698,7 @@ xfs_dir2_node_addname_int(
 	dep->inumber = cpu_to_be64(args->inumber);
 	dep->namelen = args->namelen;
 	memcpy(dep->name, args->name, dep->namelen);
-	tagp = XFS_DIR2_DATA_ENTRY_TAG_P(dep);
+	tagp = xfs_dir2_data_entry_tag_p(dep);
 	*tagp = cpu_to_be16((char *)dep - (char *)data);
 	xfs_dir2_data_log_entry(tp, dbp, dep);
 	/*
@@ -1904,7 +1904,7 @@ xfs_dir2_node_replace(
 		ASSERT(be32_to_cpu(data->hdr.magic) == XFS_DIR2_DATA_MAGIC);
 		dep = (xfs_dir2_data_entry_t *)
 		      ((char *)data +
-		       XFS_DIR2_DATAPTR_TO_OFF(state->mp, be32_to_cpu(lep->address)));
+		       xfs_dir2_dataptr_to_off(state->mp, be32_to_cpu(lep->address)));
 		ASSERT(inum != be64_to_cpu(dep->inumber));
 		/*
 		 * Fill in the new inode number and log the entry.
@@ -1980,7 +1980,7 @@ xfs_dir2_node_trim_free(
 	 * Blow the block away.
 	 */
 	if ((error =
-	    xfs_dir2_shrink_inode(args, XFS_DIR2_DA_TO_DB(mp, (xfs_dablk_t)fo),
+	    xfs_dir2_shrink_inode(args, xfs_dir2_da_to_db(mp, (xfs_dablk_t)fo),
 		    bp))) {
 		/*
 		 * Can't fail with ENOSPC since that only happens with no
diff --git a/fs/xfs/xfs_dir2_node.h b/fs/xfs/xfs_dir2_node.h
index c7c870e..dde72db 100644
--- a/fs/xfs/xfs_dir2_node.h
+++ b/fs/xfs/xfs_dir2_node.h
@@ -36,7 +36,7 @@ struct xfs_trans;
 #define	XFS_DIR2_FREE_SPACE	2
 #define	XFS_DIR2_FREE_OFFSET	(XFS_DIR2_FREE_SPACE * XFS_DIR2_SPACE_SIZE)
 #define	XFS_DIR2_FREE_FIRSTDB(mp)	\
-	XFS_DIR2_BYTE_TO_DB(mp, XFS_DIR2_FREE_OFFSET)
+	xfs_dir2_byte_to_db(mp, XFS_DIR2_FREE_OFFSET)
 
 #define	XFS_DIR2_FREE_MAGIC	0x58443246	/* XD2F */
 
@@ -60,7 +60,6 @@ typedef struct xfs_dir2_free {
 /*
  * Convert data space db to the corresponding free db.
  */
-#define	XFS_DIR2_DB_TO_FDB(mp,db)	xfs_dir2_db_to_fdb(mp, db)
 static inline xfs_dir2_db_t
 xfs_dir2_db_to_fdb(struct xfs_mount *mp, xfs_dir2_db_t db)
 {
@@ -70,7 +69,6 @@ xfs_dir2_db_to_fdb(struct xfs_mount *mp, xfs_dir2_db_t db)
 /*
  * Convert data space db to the corresponding index in a free db.
  */
-#define	XFS_DIR2_DB_TO_FDINDEX(mp,db)	xfs_dir2_db_to_fdindex(mp, db)
 static inline int
 xfs_dir2_db_to_fdindex(struct xfs_mount *mp, xfs_dir2_db_t db)
 {
diff --git a/fs/xfs/xfs_dir2_sf.c b/fs/xfs/xfs_dir2_sf.c
index 0cd77b1..38fc4f2 100644
--- a/fs/xfs/xfs_dir2_sf.c
+++ b/fs/xfs/xfs_dir2_sf.c
@@ -89,8 +89,8 @@ xfs_dir2_block_sfsize(
 	mp = dp->i_mount;
 
 	count = i8count = namelen = 0;
-	btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
-	blp = XFS_DIR2_BLOCK_LEAF_P(btp);
+	btp = xfs_dir2_block_tail_p(mp, block);
+	blp = xfs_dir2_block_leaf_p(btp);
 
 	/*
 	 * Iterate over the block's data entries by using the leaf pointers.
@@ -102,7 +102,7 @@ xfs_dir2_block_sfsize(
 		 * Calculate the pointer to the entry at hand.
 		 */
 		dep = (xfs_dir2_data_entry_t *)
-		      ((char *)block + XFS_DIR2_DATAPTR_TO_OFF(mp, addr));
+		      ((char *)block + xfs_dir2_dataptr_to_off(mp, addr));
 		/*
 		 * Detect . and .., so we can special-case them.
 		 * . is not included in sf directories.
@@ -124,7 +124,7 @@ xfs_dir2_block_sfsize(
 		/*
 		 * Calculate the new size, see if we should give up yet.
 		 */
-		size = XFS_DIR2_SF_HDR_SIZE(i8count) +		/* header */
+		size = xfs_dir2_sf_hdr_size(i8count) +		/* header */
 		       count +					/* namelen */
 		       count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */
 		       namelen +				/* name */
@@ -139,7 +139,7 @@ xfs_dir2_block_sfsize(
 	 */
 	sfhp->count = count;
 	sfhp->i8count = i8count;
-	XFS_DIR2_SF_PUT_INUMBER((xfs_dir2_sf_t *)sfhp, &parent, &sfhp->parent);
+	xfs_dir2_sf_put_inumber((xfs_dir2_sf_t *)sfhp, &parent, &sfhp->parent);
 	return size;
 }
 
@@ -199,15 +199,15 @@ xfs_dir2_block_to_sf(
 	 * Copy the header into the newly allocate local space.
 	 */
 	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
-	memcpy(sfp, sfhp, XFS_DIR2_SF_HDR_SIZE(sfhp->i8count));
+	memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count));
 	dp->i_d.di_size = size;
 	/*
 	 * Set up to loop over the block's entries.
 	 */
-	btp = XFS_DIR2_BLOCK_TAIL_P(mp, block);
+	btp = xfs_dir2_block_tail_p(mp, block);
 	ptr = (char *)block->u;
-	endptr = (char *)XFS_DIR2_BLOCK_LEAF_P(btp);
-	sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
+	endptr = (char *)xfs_dir2_block_leaf_p(btp);
+	sfep = xfs_dir2_sf_firstentry(sfp);
 	/*
 	 * Loop over the active and unused entries.
 	 * Stop when we reach the leaf/tail portion of the block.
@@ -233,22 +233,22 @@ xfs_dir2_block_to_sf(
 		else if (dep->namelen == 2 &&
 			 dep->name[0] == '.' && dep->name[1] == '.')
 			ASSERT(be64_to_cpu(dep->inumber) ==
-			       XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent));
+			       xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent));
 		/*
 		 * Normal entry, copy it into shortform.
 		 */
 		else {
 			sfep->namelen = dep->namelen;
-			XFS_DIR2_SF_PUT_OFFSET(sfep,
+			xfs_dir2_sf_put_offset(sfep,
 				(xfs_dir2_data_aoff_t)
 				((char *)dep - (char *)block));
 			memcpy(sfep->name, dep->name, dep->namelen);
 			temp = be64_to_cpu(dep->inumber);
-			XFS_DIR2_SF_PUT_INUMBER(sfp, &temp,
-				XFS_DIR2_SF_INUMBERP(sfep));
-			sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep);
+			xfs_dir2_sf_put_inumber(sfp, &temp,
+				xfs_dir2_sf_inumberp(sfep));
+			sfep = xfs_dir2_sf_nextentry(sfp, sfep);
 		}
-		ptr += XFS_DIR2_DATA_ENTSIZE(dep->namelen);
+		ptr += xfs_dir2_data_entsize(dep->namelen);
 	}
 	ASSERT((char *)sfep - (char *)sfp == size);
 	xfs_dir2_sf_check(args);
@@ -294,11 +294,11 @@ xfs_dir2_sf_addname(
 	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
 	ASSERT(dp->i_df.if_u1.if_data != NULL);
 	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
-	ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
+	ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
 	/*
 	 * Compute entry (and change in) size.
 	 */
-	add_entsize = XFS_DIR2_SF_ENTSIZE_BYNAME(sfp, args->namelen);
+	add_entsize = xfs_dir2_sf_entsize_byname(sfp, args->namelen);
 	incr_isize = add_entsize;
 	objchange = 0;
 #if XFS_BIG_INUMS
@@ -392,7 +392,7 @@ xfs_dir2_sf_addname_easy(
 	/*
 	 * Grow the in-inode space.
 	 */
-	xfs_idata_realloc(dp, XFS_DIR2_SF_ENTSIZE_BYNAME(sfp, args->namelen),
+	xfs_idata_realloc(dp, xfs_dir2_sf_entsize_byname(sfp, args->namelen),
 		XFS_DATA_FORK);
 	/*
 	 * Need to set up again due to realloc of the inode data.
@@ -403,10 +403,10 @@ xfs_dir2_sf_addname_easy(
 	 * Fill in the new entry.
 	 */
 	sfep->namelen = args->namelen;
-	XFS_DIR2_SF_PUT_OFFSET(sfep, offset);
+	xfs_dir2_sf_put_offset(sfep, offset);
 	memcpy(sfep->name, args->name, sfep->namelen);
-	XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber,
-		XFS_DIR2_SF_INUMBERP(sfep));
+	xfs_dir2_sf_put_inumber(sfp, &args->inumber,
+		xfs_dir2_sf_inumberp(sfep));
 	/*
 	 * Update the header and inode.
 	 */
@@ -463,14 +463,14 @@ xfs_dir2_sf_addname_hard(
 	 * If it's going to end up at the end then oldsfep will point there.
 	 */
 	for (offset = XFS_DIR2_DATA_FIRST_OFFSET,
-	      oldsfep = XFS_DIR2_SF_FIRSTENTRY(oldsfp),
-	      add_datasize = XFS_DIR2_DATA_ENTSIZE(args->namelen),
+	      oldsfep = xfs_dir2_sf_firstentry(oldsfp),
+	      add_datasize = xfs_dir2_data_entsize(args->namelen),
 	      eof = (char *)oldsfep == &buf[old_isize];
 	     !eof;
-	     offset = new_offset + XFS_DIR2_DATA_ENTSIZE(oldsfep->namelen),
-	      oldsfep = XFS_DIR2_SF_NEXTENTRY(oldsfp, oldsfep),
+	     offset = new_offset + xfs_dir2_data_entsize(oldsfep->namelen),
+	      oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep),
 	      eof = (char *)oldsfep == &buf[old_isize]) {
-		new_offset = XFS_DIR2_SF_GET_OFFSET(oldsfep);
+		new_offset = xfs_dir2_sf_get_offset(oldsfep);
 		if (offset + add_datasize <= new_offset)
 			break;
 	}
@@ -495,10 +495,10 @@ xfs_dir2_sf_addname_hard(
 	 * Fill in the new entry, and update the header counts.
 	 */
 	sfep->namelen = args->namelen;
-	XFS_DIR2_SF_PUT_OFFSET(sfep, offset);
+	xfs_dir2_sf_put_offset(sfep, offset);
 	memcpy(sfep->name, args->name, sfep->namelen);
-	XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber,
-		XFS_DIR2_SF_INUMBERP(sfep));
+	xfs_dir2_sf_put_inumber(sfp, &args->inumber,
+		xfs_dir2_sf_inumberp(sfep));
 	sfp->hdr.count++;
 #if XFS_BIG_INUMS
 	if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
@@ -508,7 +508,7 @@ xfs_dir2_sf_addname_hard(
 	 * If there's more left to copy, do that.
 	 */
 	if (!eof) {
-		sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep);
+		sfep = xfs_dir2_sf_nextentry(sfp, sfep);
 		memcpy(sfep, oldsfep, old_isize - nbytes);
 	}
 	kmem_free(buf, old_isize);
@@ -544,9 +544,9 @@ xfs_dir2_sf_addname_pick(
 	mp = dp->i_mount;
 
 	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
-	size = XFS_DIR2_DATA_ENTSIZE(args->namelen);
+	size = xfs_dir2_data_entsize(args->namelen);
 	offset = XFS_DIR2_DATA_FIRST_OFFSET;
-	sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
+	sfep = xfs_dir2_sf_firstentry(sfp);
 	holefit = 0;
 	/*
 	 * Loop over sf entries.
@@ -555,10 +555,10 @@ xfs_dir2_sf_addname_pick(
 	 */
 	for (i = 0; i < sfp->hdr.count; i++) {
 		if (!holefit)
-			holefit = offset + size <= XFS_DIR2_SF_GET_OFFSET(sfep);
-		offset = XFS_DIR2_SF_GET_OFFSET(sfep) +
-			 XFS_DIR2_DATA_ENTSIZE(sfep->namelen);
-		sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep);
+			holefit = offset + size <= xfs_dir2_sf_get_offset(sfep);
+		offset = xfs_dir2_sf_get_offset(sfep) +
+			 xfs_dir2_data_entsize(sfep->namelen);
+		sfep = xfs_dir2_sf_nextentry(sfp, sfep);
 	}
 	/*
 	 * Calculate data bytes used excluding the new entry, if this
@@ -617,18 +617,18 @@ xfs_dir2_sf_check(
 
 	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
 	offset = XFS_DIR2_DATA_FIRST_OFFSET;
-	ino = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent);
+	ino = xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent);
 	i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
 
-	for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
+	for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
 	     i < sfp->hdr.count;
-	     i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
-		ASSERT(XFS_DIR2_SF_GET_OFFSET(sfep) >= offset);
-		ino = XFS_DIR2_SF_GET_INUMBER(sfp, XFS_DIR2_SF_INUMBERP(sfep));
+	     i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
+		ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset);
+		ino = xfs_dir2_sf_get_inumber(sfp, xfs_dir2_sf_inumberp(sfep));
 		i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
 		offset =
-			XFS_DIR2_SF_GET_OFFSET(sfep) +
-			XFS_DIR2_DATA_ENTSIZE(sfep->namelen);
+			xfs_dir2_sf_get_offset(sfep) +
+			xfs_dir2_data_entsize(sfep->namelen);
 	}
 	ASSERT(i8count == sfp->hdr.i8count);
 	ASSERT(XFS_BIG_INUMS || i8count == 0);
@@ -671,7 +671,7 @@ xfs_dir2_sf_create(
 	ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
 	ASSERT(dp->i_df.if_bytes == 0);
 	i8count = pino > XFS_DIR2_MAX_SHORT_INUM;
-	size = XFS_DIR2_SF_HDR_SIZE(i8count);
+	size = xfs_dir2_sf_hdr_size(i8count);
 	/*
 	 * Make a buffer for the data.
 	 */
@@ -684,7 +684,7 @@ xfs_dir2_sf_create(
 	/*
 	 * Now can put in the inode number, since i8count is set.
 	 */
-	XFS_DIR2_SF_PUT_INUMBER(sfp, &pino, &sfp->hdr.parent);
+	xfs_dir2_sf_put_inumber(sfp, &pino, &sfp->hdr.parent);
 	sfp->hdr.count = 0;
 	dp->i_d.di_size = size;
 	xfs_dir2_sf_check(args);
@@ -727,12 +727,12 @@ xfs_dir2_sf_getdents(
 
 	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
 
-	ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
+	ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
 
 	/*
 	 * If the block number in the offset is out of range, we're done.
 	 */
-	if (XFS_DIR2_DATAPTR_TO_DB(mp, dir_offset) > mp->m_dirdatablk) {
+	if (xfs_dir2_dataptr_to_db(mp, dir_offset) > mp->m_dirdatablk) {
 		*eofp = 1;
 		return 0;
 	}
@@ -747,9 +747,9 @@ xfs_dir2_sf_getdents(
 	 * Put . entry unless we're starting past it.
 	 */
 	if (dir_offset <=
-		    XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
+		    xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
 					       XFS_DIR2_DATA_DOT_OFFSET)) {
-		p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, 0,
+		p.cook = xfs_dir2_db_off_to_dataptr(mp, 0,
 						XFS_DIR2_DATA_DOTDOT_OFFSET);
 		p.ino = dp->i_ino;
 #if XFS_BIG_INUMS
@@ -762,7 +762,7 @@ xfs_dir2_sf_getdents(
 
 		if (!p.done) {
 			uio->uio_offset =
-				XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
+				xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
 						XFS_DIR2_DATA_DOT_OFFSET);
 			return error;
 		}
@@ -772,11 +772,11 @@ xfs_dir2_sf_getdents(
 	 * Put .. entry unless we're starting past it.
 	 */
 	if (dir_offset <=
-		    XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
+		    xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
 					       XFS_DIR2_DATA_DOTDOT_OFFSET)) {
-		p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
+		p.cook = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
 						XFS_DIR2_DATA_FIRST_OFFSET);
-		p.ino = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent);
+		p.ino = xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent);
 #if XFS_BIG_INUMS
 		p.ino += mp->m_inoadd;
 #endif
@@ -787,7 +787,7 @@ xfs_dir2_sf_getdents(
 
 		if (!p.done) {
 			uio->uio_offset =
-				XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
+				xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
 					XFS_DIR2_DATA_DOTDOT_OFFSET);
 			return error;
 		}
@@ -796,23 +796,23 @@ xfs_dir2_sf_getdents(
 	/*
 	 * Loop while there are more entries and put'ing works.
 	 */
-	for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
+	for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
 		     i < sfp->hdr.count;
-			     i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
+			     i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
 
-		off = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
-				XFS_DIR2_SF_GET_OFFSET(sfep));
+		off = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
+				xfs_dir2_sf_get_offset(sfep));
 
 		if (dir_offset > off)
 			continue;
 
 		p.namelen = sfep->namelen;
 
-		p.cook = XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk,
-			XFS_DIR2_SF_GET_OFFSET(sfep) +
-			XFS_DIR2_DATA_ENTSIZE(p.namelen));
+		p.cook = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
+			xfs_dir2_sf_get_offset(sfep) +
+			xfs_dir2_data_entsize(p.namelen));
 
-		p.ino = XFS_DIR2_SF_GET_INUMBER(sfp, XFS_DIR2_SF_INUMBERP(sfep));
+		p.ino = xfs_dir2_sf_get_inumber(sfp, xfs_dir2_sf_inumberp(sfep));
 #if XFS_BIG_INUMS
 		p.ino += mp->m_inoadd;
 #endif
@@ -832,7 +832,7 @@ xfs_dir2_sf_getdents(
 	*eofp = 1;
 
 	uio->uio_offset =
-		XFS_DIR2_DB_OFF_TO_DATAPTR(mp, mp->m_dirdatablk + 1, 0);
+		xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk + 1, 0);
 
 	return 0;
 }
@@ -865,7 +865,7 @@ xfs_dir2_sf_lookup(
 	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
 	ASSERT(dp->i_df.if_u1.if_data != NULL);
 	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
-	ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
+	ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
 	/*
 	 * Special case for .
 	 */
@@ -878,21 +878,21 @@ xfs_dir2_sf_lookup(
 	 */
 	if (args->namelen == 2 &&
 	    args->name[0] == '.' && args->name[1] == '.') {
-		args->inumber = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent);
+		args->inumber = xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent);
 		return XFS_ERROR(EEXIST);
 	}
 	/*
 	 * Loop over all the entries trying to match ours.
 	 */
-	for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
+	for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
 	     i < sfp->hdr.count;
-	     i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
+	     i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
 		if (sfep->namelen == args->namelen &&
 		    sfep->name[0] == args->name[0] &&
 		    memcmp(args->name, sfep->name, args->namelen) == 0) {
 			args->inumber =
-				XFS_DIR2_SF_GET_INUMBER(sfp,
-					XFS_DIR2_SF_INUMBERP(sfep));
+				xfs_dir2_sf_get_inumber(sfp,
+					xfs_dir2_sf_inumberp(sfep));
 			return XFS_ERROR(EEXIST);
 		}
 	}
@@ -934,19 +934,19 @@ xfs_dir2_sf_removename(
 	ASSERT(dp->i_df.if_bytes == oldsize);
 	ASSERT(dp->i_df.if_u1.if_data != NULL);
 	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
-	ASSERT(oldsize >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
+	ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
 	/*
 	 * Loop over the old directory entries.
 	 * Find the one we're deleting.
 	 */
-	for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
+	for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
 	     i < sfp->hdr.count;
-	     i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
+	     i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
 		if (sfep->namelen == args->namelen &&
 		    sfep->name[0] == args->name[0] &&
 		    memcmp(sfep->name, args->name, args->namelen) == 0) {
-			ASSERT(XFS_DIR2_SF_GET_INUMBER(sfp,
-					XFS_DIR2_SF_INUMBERP(sfep)) ==
+			ASSERT(xfs_dir2_sf_get_inumber(sfp,
+					xfs_dir2_sf_inumberp(sfep)) ==
 				args->inumber);
 			break;
 		}
@@ -961,7 +961,7 @@ xfs_dir2_sf_removename(
 	 * Calculate sizes.
 	 */
 	byteoff = (int)((char *)sfep - (char *)sfp);
-	entsize = XFS_DIR2_SF_ENTSIZE_BYNAME(sfp, args->namelen);
+	entsize = xfs_dir2_sf_entsize_byname(sfp, args->namelen);
 	newsize = oldsize - entsize;
 	/*
 	 * Copy the part if any after the removed entry, sliding it down.
@@ -1027,7 +1027,7 @@ xfs_dir2_sf_replace(
 	ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
 	ASSERT(dp->i_df.if_u1.if_data != NULL);
 	sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
-	ASSERT(dp->i_d.di_size >= XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count));
+	ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
 #if XFS_BIG_INUMS
 	/*
 	 * New inode number is large, and need to convert to 8-byte inodes.
@@ -1067,28 +1067,28 @@ xfs_dir2_sf_replace(
 	if (args->namelen == 2 &&
 	    args->name[0] == '.' && args->name[1] == '.') {
 #if XFS_BIG_INUMS || defined(DEBUG)
-		ino = XFS_DIR2_SF_GET_INUMBER(sfp, &sfp->hdr.parent);
+		ino = xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent);
 		ASSERT(args->inumber != ino);
 #endif
-		XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber, &sfp->hdr.parent);
+		xfs_dir2_sf_put_inumber(sfp, &args->inumber, &sfp->hdr.parent);
 	}
 	/*
 	 * Normal entry, look for the name.
 	 */
 	else {
-		for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp);
+		for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
 		     i < sfp->hdr.count;
-		     i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep)) {
+		     i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
 			if (sfep->namelen == args->namelen &&
 			    sfep->name[0] == args->name[0] &&
 			    memcmp(args->name, sfep->name, args->namelen) == 0) {
 #if XFS_BIG_INUMS || defined(DEBUG)
-				ino = XFS_DIR2_SF_GET_INUMBER(sfp,
-					XFS_DIR2_SF_INUMBERP(sfep));
+				ino = xfs_dir2_sf_get_inumber(sfp,
+					xfs_dir2_sf_inumberp(sfep));
 				ASSERT(args->inumber != ino);
 #endif
-				XFS_DIR2_SF_PUT_INUMBER(sfp, &args->inumber,
-					XFS_DIR2_SF_INUMBERP(sfep));
+				xfs_dir2_sf_put_inumber(sfp, &args->inumber,
+					xfs_dir2_sf_inumberp(sfep));
 				break;
 			}
 		}
@@ -1189,22 +1189,22 @@ xfs_dir2_sf_toino4(
 	 */
 	sfp->hdr.count = oldsfp->hdr.count;
 	sfp->hdr.i8count = 0;
-	ino = XFS_DIR2_SF_GET_INUMBER(oldsfp, &oldsfp->hdr.parent);
-	XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, &sfp->hdr.parent);
+	ino = xfs_dir2_sf_get_inumber(oldsfp, &oldsfp->hdr.parent);
+	xfs_dir2_sf_put_inumber(sfp, &ino, &sfp->hdr.parent);
 	/*
 	 * Copy the entries field by field.
 	 */
-	for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp),
-		    oldsfep = XFS_DIR2_SF_FIRSTENTRY(oldsfp);
+	for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
+		    oldsfep = xfs_dir2_sf_firstentry(oldsfp);
 	     i < sfp->hdr.count;
-	     i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep),
-		  oldsfep = XFS_DIR2_SF_NEXTENTRY(oldsfp, oldsfep)) {
+	     i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep),
+		  oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep)) {
 		sfep->namelen = oldsfep->namelen;
 		sfep->offset = oldsfep->offset;
 		memcpy(sfep->name, oldsfep->name, sfep->namelen);
-		ino = XFS_DIR2_SF_GET_INUMBER(oldsfp,
-			XFS_DIR2_SF_INUMBERP(oldsfep));
-		XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, XFS_DIR2_SF_INUMBERP(sfep));
+		ino = xfs_dir2_sf_get_inumber(oldsfp,
+			xfs_dir2_sf_inumberp(oldsfep));
+		xfs_dir2_sf_put_inumber(sfp, &ino, xfs_dir2_sf_inumberp(sfep));
 	}
 	/*
 	 * Clean up the inode.
@@ -1266,22 +1266,22 @@ xfs_dir2_sf_toino8(
 	 */
 	sfp->hdr.count = oldsfp->hdr.count;
 	sfp->hdr.i8count = 1;
-	ino = XFS_DIR2_SF_GET_INUMBER(oldsfp, &oldsfp->hdr.parent);
-	XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, &sfp->hdr.parent);
+	ino = xfs_dir2_sf_get_inumber(oldsfp, &oldsfp->hdr.parent);
+	xfs_dir2_sf_put_inumber(sfp, &ino, &sfp->hdr.parent);
 	/*
 	 * Copy the entries field by field.
 	 */
-	for (i = 0, sfep = XFS_DIR2_SF_FIRSTENTRY(sfp),
-		    oldsfep = XFS_DIR2_SF_FIRSTENTRY(oldsfp);
+	for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
+		    oldsfep = xfs_dir2_sf_firstentry(oldsfp);
 	     i < sfp->hdr.count;
-	     i++, sfep = XFS_DIR2_SF_NEXTENTRY(sfp, sfep),
-		  oldsfep = XFS_DIR2_SF_NEXTENTRY(oldsfp, oldsfep)) {
+	     i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep),
+		  oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep)) {
 		sfep->namelen = oldsfep->namelen;
 		sfep->offset = oldsfep->offset;
 		memcpy(sfep->name, oldsfep->name, sfep->namelen);
-		ino = XFS_DIR2_SF_GET_INUMBER(oldsfp,
-			XFS_DIR2_SF_INUMBERP(oldsfep));
-		XFS_DIR2_SF_PUT_INUMBER(sfp, &ino, XFS_DIR2_SF_INUMBERP(sfep));
+		ino = xfs_dir2_sf_get_inumber(oldsfp,
+			xfs_dir2_sf_inumberp(oldsfep));
+		xfs_dir2_sf_put_inumber(sfp, &ino, xfs_dir2_sf_inumberp(sfep));
 	}
 	/*
 	 * Clean up the inode.
diff --git a/fs/xfs/xfs_dir2_sf.h b/fs/xfs/xfs_dir2_sf.h
index 42f015b..11e5032 100644
--- a/fs/xfs/xfs_dir2_sf.h
+++ b/fs/xfs/xfs_dir2_sf.h
@@ -90,7 +90,6 @@ typedef struct xfs_dir2_sf {
 	xfs_dir2_sf_entry_t	list[1];	/* shortform entries */
 } xfs_dir2_sf_t;
 
-#define	XFS_DIR2_SF_HDR_SIZE(i8count)	xfs_dir2_sf_hdr_size(i8count)
 static inline int xfs_dir2_sf_hdr_size(int i8count)
 {
 	return ((uint)sizeof(xfs_dir2_sf_hdr_t) - \
@@ -98,14 +97,11 @@ static inline int xfs_dir2_sf_hdr_size(int i8count)
 		((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)));
 }
 
-#define	XFS_DIR2_SF_INUMBERP(sfep)	xfs_dir2_sf_inumberp(sfep)
 static inline xfs_dir2_inou_t *xfs_dir2_sf_inumberp(xfs_dir2_sf_entry_t *sfep)
 {
 	return (xfs_dir2_inou_t *)&(sfep)->name[(sfep)->namelen];
 }
 
-#define	XFS_DIR2_SF_GET_INUMBER(sfp, from) \
-	xfs_dir2_sf_get_inumber(sfp, from)
 static inline xfs_intino_t
 xfs_dir2_sf_get_inumber(xfs_dir2_sf_t *sfp, xfs_dir2_inou_t *from)
 {
@@ -114,8 +110,6 @@ xfs_dir2_sf_get_inumber(xfs_dir2_sf_t *sfp, xfs_dir2_inou_t *from)
 		(xfs_intino_t)XFS_GET_DIR_INO8((from)->i8));
 }
 
-#define	XFS_DIR2_SF_PUT_INUMBER(sfp,from,to) \
-	xfs_dir2_sf_put_inumber(sfp,from,to)
 static inline void xfs_dir2_sf_put_inumber(xfs_dir2_sf_t *sfp, xfs_ino_t *from,
 						xfs_dir2_inou_t *to)
 {
@@ -125,24 +119,18 @@ static inline void xfs_dir2_sf_put_inumber(xfs_dir2_sf_t *sfp, xfs_ino_t *from,
 		XFS_PUT_DIR_INO8(*(from), (to)->i8);
 }
 
-#define	XFS_DIR2_SF_GET_OFFSET(sfep)	\
-	xfs_dir2_sf_get_offset(sfep)
 static inline xfs_dir2_data_aoff_t
 xfs_dir2_sf_get_offset(xfs_dir2_sf_entry_t *sfep)
 {
 	return INT_GET_UNALIGNED_16_BE(&(sfep)->offset.i);
 }
 
-#define	XFS_DIR2_SF_PUT_OFFSET(sfep,off) \
-	xfs_dir2_sf_put_offset(sfep,off)
 static inline void
 xfs_dir2_sf_put_offset(xfs_dir2_sf_entry_t *sfep, xfs_dir2_data_aoff_t off)
 {
 	INT_SET_UNALIGNED_16_BE(&(sfep)->offset.i, off);
 }
 
-#define XFS_DIR2_SF_ENTSIZE_BYNAME(sfp,len)	\
-	xfs_dir2_sf_entsize_byname(sfp,len)
 static inline int xfs_dir2_sf_entsize_byname(xfs_dir2_sf_t *sfp, int len)
 {
 	return ((uint)sizeof(xfs_dir2_sf_entry_t) - 1 + (len) - \
@@ -150,8 +138,6 @@ static inline int xfs_dir2_sf_entsize_byname(xfs_dir2_sf_t *sfp, int len)
 		((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)));
 }
 
-#define XFS_DIR2_SF_ENTSIZE_BYENTRY(sfp,sfep)	\
-	xfs_dir2_sf_entsize_byentry(sfp,sfep)
 static inline int
 xfs_dir2_sf_entsize_byentry(xfs_dir2_sf_t *sfp, xfs_dir2_sf_entry_t *sfep)
 {
@@ -160,19 +146,17 @@ xfs_dir2_sf_entsize_byentry(xfs_dir2_sf_t *sfp, xfs_dir2_sf_entry_t *sfep)
 		((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)));
 }
 
-#define XFS_DIR2_SF_FIRSTENTRY(sfp)	xfs_dir2_sf_firstentry(sfp)
 static inline xfs_dir2_sf_entry_t *xfs_dir2_sf_firstentry(xfs_dir2_sf_t *sfp)
 {
 	return ((xfs_dir2_sf_entry_t *) \
-		((char *)(sfp) + XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count)));
+		((char *)(sfp) + xfs_dir2_sf_hdr_size(sfp->hdr.i8count)));
 }
 
-#define XFS_DIR2_SF_NEXTENTRY(sfp,sfep)	xfs_dir2_sf_nextentry(sfp,sfep)
 static inline xfs_dir2_sf_entry_t *
 xfs_dir2_sf_nextentry(xfs_dir2_sf_t *sfp, xfs_dir2_sf_entry_t *sfep)
 {
 	return ((xfs_dir2_sf_entry_t *) \
-		((char *)(sfep) + XFS_DIR2_SF_ENTSIZE_BYENTRY(sfp,sfep)));
+		((char *)(sfep) + xfs_dir2_sf_entsize_byentry(sfp,sfep)));
 }
 
 /*
diff --git a/fs/xfs/xfs_filestream.c b/fs/xfs/xfs_filestream.c
new file mode 100644
index 0000000..ce22786
--- /dev/null
+++ b/fs/xfs/xfs_filestream.c
@@ -0,0 +1,771 @@
+/*
+ * Copyright (c) 2006-2007 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#include "xfs.h"
+#include "xfs_bmap_btree.h"
+#include "xfs_inum.h"
+#include "xfs_dir2.h"
+#include "xfs_dir2_sf.h"
+#include "xfs_attr_sf.h"
+#include "xfs_dinode.h"
+#include "xfs_inode.h"
+#include "xfs_ag.h"
+#include "xfs_dmapi.h"
+#include "xfs_log.h"
+#include "xfs_trans.h"
+#include "xfs_sb.h"
+#include "xfs_mount.h"
+#include "xfs_bmap.h"
+#include "xfs_alloc.h"
+#include "xfs_utils.h"
+#include "xfs_mru_cache.h"
+#include "xfs_filestream.h"
+
+#ifdef XFS_FILESTREAMS_TRACE
+
+ktrace_t *xfs_filestreams_trace_buf;
+
+STATIC void
+xfs_filestreams_trace(
+	xfs_mount_t	*mp,	/* mount point */
+	int		type,	/* type of trace */
+	const char	*func,	/* source function */
+	int		line,	/* source line number */
+	__psunsigned_t	arg0,
+	__psunsigned_t	arg1,
+	__psunsigned_t	arg2,
+	__psunsigned_t	arg3,
+	__psunsigned_t	arg4,
+	__psunsigned_t	arg5)
+{
+	ktrace_enter(xfs_filestreams_trace_buf,
+		(void *)(__psint_t)(type | (line << 16)),
+		(void *)func,
+		(void *)(__psunsigned_t)current_pid(),
+		(void *)mp,
+		(void *)(__psunsigned_t)arg0,
+		(void *)(__psunsigned_t)arg1,
+		(void *)(__psunsigned_t)arg2,
+		(void *)(__psunsigned_t)arg3,
+		(void *)(__psunsigned_t)arg4,
+		(void *)(__psunsigned_t)arg5,
+		NULL, NULL, NULL, NULL, NULL, NULL);
+}
+
+#define TRACE0(mp,t)			TRACE6(mp,t,0,0,0,0,0,0)
+#define TRACE1(mp,t,a0)			TRACE6(mp,t,a0,0,0,0,0,0)
+#define TRACE2(mp,t,a0,a1)		TRACE6(mp,t,a0,a1,0,0,0,0)
+#define TRACE3(mp,t,a0,a1,a2)		TRACE6(mp,t,a0,a1,a2,0,0,0)
+#define TRACE4(mp,t,a0,a1,a2,a3)	TRACE6(mp,t,a0,a1,a2,a3,0,0)
+#define TRACE5(mp,t,a0,a1,a2,a3,a4)	TRACE6(mp,t,a0,a1,a2,a3,a4,0)
+#define TRACE6(mp,t,a0,a1,a2,a3,a4,a5) \
+	xfs_filestreams_trace(mp, t, __FUNCTION__, __LINE__, \
+				(__psunsigned_t)a0, (__psunsigned_t)a1, \
+				(__psunsigned_t)a2, (__psunsigned_t)a3, \
+				(__psunsigned_t)a4, (__psunsigned_t)a5)
+
+#define TRACE_AG_SCAN(mp, ag, ag2) \
+		TRACE2(mp, XFS_FSTRM_KTRACE_AGSCAN, ag, ag2);
+#define TRACE_AG_PICK1(mp, max_ag, maxfree) \
+		TRACE2(mp, XFS_FSTRM_KTRACE_AGPICK1, max_ag, maxfree);
+#define TRACE_AG_PICK2(mp, ag, ag2, cnt, free, scan, flag) \
+		TRACE6(mp, XFS_FSTRM_KTRACE_AGPICK2, ag, ag2, \
+			 cnt, free, scan, flag)
+#define TRACE_UPDATE(mp, ip, ag, cnt, ag2, cnt2) \
+		TRACE5(mp, XFS_FSTRM_KTRACE_UPDATE, ip, ag, cnt, ag2, cnt2)
+#define TRACE_FREE(mp, ip, pip, ag, cnt) \
+		TRACE4(mp, XFS_FSTRM_KTRACE_FREE, ip, pip, ag, cnt)
+#define TRACE_LOOKUP(mp, ip, pip, ag, cnt) \
+		TRACE4(mp, XFS_FSTRM_KTRACE_ITEM_LOOKUP, ip, pip, ag, cnt)
+#define TRACE_ASSOCIATE(mp, ip, pip, ag, cnt) \
+		TRACE4(mp, XFS_FSTRM_KTRACE_ASSOCIATE, ip, pip, ag, cnt)
+#define TRACE_MOVEAG(mp, ip, pip, oag, ocnt, nag, ncnt) \
+		TRACE6(mp, XFS_FSTRM_KTRACE_MOVEAG, ip, pip, oag, ocnt, nag, ncnt)
+#define TRACE_ORPHAN(mp, ip, ag) \
+		TRACE2(mp, XFS_FSTRM_KTRACE_ORPHAN, ip, ag);
+
+
+#else
+#define TRACE_AG_SCAN(mp, ag, ag2)
+#define TRACE_AG_PICK1(mp, max_ag, maxfree)
+#define TRACE_AG_PICK2(mp, ag, ag2, cnt, free, scan, flag)
+#define TRACE_UPDATE(mp, ip, ag, cnt, ag2, cnt2)
+#define TRACE_FREE(mp, ip, pip, ag, cnt)
+#define TRACE_LOOKUP(mp, ip, pip, ag, cnt)
+#define TRACE_ASSOCIATE(mp, ip, pip, ag, cnt)
+#define TRACE_MOVEAG(mp, ip, pip, oag, ocnt, nag, ncnt)
+#define TRACE_ORPHAN(mp, ip, ag)
+#endif
+
+static kmem_zone_t *item_zone;
+
+/*
+ * Structure for associating a file or a directory with an allocation group.
+ * The parent directory pointer is only needed for files, but since there will
+ * generally be vastly more files than directories in the cache, using the same
+ * data structure simplifies the code with very little memory overhead.
+ */
+typedef struct fstrm_item
+{
+	xfs_agnumber_t	ag;	/* AG currently in use for the file/directory. */
+	xfs_inode_t	*ip;	/* inode self-pointer. */
+	xfs_inode_t	*pip;	/* Parent directory inode pointer. */
+} fstrm_item_t;
+
+
+/*
+ * Scan the AGs starting at startag looking for an AG that isn't in use and has
+ * at least minlen blocks free.
+ */
+static int
+_xfs_filestream_pick_ag(
+	xfs_mount_t	*mp,
+	xfs_agnumber_t	startag,
+	xfs_agnumber_t	*agp,
+	int		flags,
+	xfs_extlen_t	minlen)
+{
+	int		err, trylock, nscan;
+	xfs_extlen_t	delta, longest, need, free, minfree, maxfree = 0;
+	xfs_agnumber_t	ag, max_ag = NULLAGNUMBER;
+	struct xfs_perag *pag;
+
+	/* 2% of an AG's blocks must be free for it to be chosen. */
+	minfree = mp->m_sb.sb_agblocks / 50;
+
+	ag = startag;
+	*agp = NULLAGNUMBER;
+
+	/* For the first pass, don't sleep trying to init the per-AG. */
+	trylock = XFS_ALLOC_FLAG_TRYLOCK;
+
+	for (nscan = 0; 1; nscan++) {
+
+		TRACE_AG_SCAN(mp, ag, xfs_filestream_peek_ag(mp, ag));
+
+		pag = mp->m_perag + ag;
+
+		if (!pag->pagf_init) {
+			err = xfs_alloc_pagf_init(mp, NULL, ag, trylock);
+			if (err && !trylock)
+				return err;
+		}
+
+		/* Might fail sometimes during the 1st pass with trylock set. */
+		if (!pag->pagf_init)
+			goto next_ag;
+
+		/* Keep track of the AG with the most free blocks. */
+		if (pag->pagf_freeblks > maxfree) {
+			maxfree = pag->pagf_freeblks;
+			max_ag = ag;
+		}
+
+		/*
+		 * The AG reference count does two things: it enforces mutual
+		 * exclusion when examining the suitability of an AG in this
+		 * loop, and it guards against two filestreams being established
+		 * in the same AG as each other.
+		 */
+		if (xfs_filestream_get_ag(mp, ag) > 1) {
+			xfs_filestream_put_ag(mp, ag);
+			goto next_ag;
+		}
+
+		need = XFS_MIN_FREELIST_PAG(pag, mp);
+		delta = need > pag->pagf_flcount ? need - pag->pagf_flcount : 0;
+		longest = (pag->pagf_longest > delta) ?
+		          (pag->pagf_longest - delta) :
+		          (pag->pagf_flcount > 0 || pag->pagf_longest > 0);
+
+		if (((minlen && longest >= minlen) ||
+		     (!minlen && pag->pagf_freeblks >= minfree)) &&
+		    (!pag->pagf_metadata || !(flags & XFS_PICK_USERDATA) ||
+		     (flags & XFS_PICK_LOWSPACE))) {
+
+			/* Break out, retaining the reference on the AG. */
+			free = pag->pagf_freeblks;
+			*agp = ag;
+			break;
+		}
+
+		/* Drop the reference on this AG, it's not usable. */
+		xfs_filestream_put_ag(mp, ag);
+next_ag:
+		/* Move to the next AG, wrapping to AG 0 if necessary. */
+		if (++ag >= mp->m_sb.sb_agcount)
+			ag = 0;
+
+		/* If a full pass of the AGs hasn't been done yet, continue. */
+		if (ag != startag)
+			continue;
+
+		/* Allow sleeping in xfs_alloc_pagf_init() on the 2nd pass. */
+		if (trylock != 0) {
+			trylock = 0;
+			continue;
+		}
+
+		/* Finally, if lowspace wasn't set, set it for the 3rd pass. */
+		if (!(flags & XFS_PICK_LOWSPACE)) {
+			flags |= XFS_PICK_LOWSPACE;
+			continue;
+		}
+
+		/*
+		 * Take the AG with the most free space, regardless of whether
+		 * it's already in use by another filestream.
+		 */
+		if (max_ag != NULLAGNUMBER) {
+			xfs_filestream_get_ag(mp, max_ag);
+			TRACE_AG_PICK1(mp, max_ag, maxfree);
+			free = maxfree;
+			*agp = max_ag;
+			break;
+		}
+
+		/* take AG 0 if none matched */
+		TRACE_AG_PICK1(mp, max_ag, maxfree);
+		*agp = 0;
+		return 0;
+	}
+
+	TRACE_AG_PICK2(mp, startag, *agp, xfs_filestream_peek_ag(mp, *agp),
+			free, nscan, flags);
+
+	return 0;
+}
+
+/*
+ * Set the allocation group number for a file or a directory, updating inode
+ * references and per-AG references as appropriate.  Must be called with the
+ * m_peraglock held in read mode.
+ */
+static int
+_xfs_filestream_update_ag(
+	xfs_inode_t	*ip,
+	xfs_inode_t	*pip,
+	xfs_agnumber_t	ag)
+{
+	int		err = 0;
+	xfs_mount_t	*mp;
+	xfs_mru_cache_t	*cache;
+	fstrm_item_t	*item;
+	xfs_agnumber_t	old_ag;
+	xfs_inode_t	*old_pip;
+
+	/*
+	 * Either ip is a regular file and pip is a directory, or ip is a
+	 * directory and pip is NULL.
+	 */
+	ASSERT(ip && (((ip->i_d.di_mode & S_IFREG) && pip &&
+	               (pip->i_d.di_mode & S_IFDIR)) ||
+	              ((ip->i_d.di_mode & S_IFDIR) && !pip)));
+
+	mp = ip->i_mount;
+	cache = mp->m_filestream;
+
+	item = xfs_mru_cache_lookup(cache, ip->i_ino);
+	if (item) {
+		ASSERT(item->ip == ip);
+		old_ag = item->ag;
+		item->ag = ag;
+		old_pip = item->pip;
+		item->pip = pip;
+		xfs_mru_cache_done(cache);
+
+		/*
+		 * If the AG has changed, drop the old ref and take a new one,
+		 * effectively transferring the reference from old to new AG.
+		 */
+		if (ag != old_ag) {
+			xfs_filestream_put_ag(mp, old_ag);
+			xfs_filestream_get_ag(mp, ag);
+		}
+
+		/*
+		 * If ip is a file and its pip has changed, drop the old ref and
+		 * take a new one.
+		 */
+		if (pip && pip != old_pip) {
+			IRELE(old_pip);
+			IHOLD(pip);
+		}
+
+		TRACE_UPDATE(mp, ip, old_ag, xfs_filestream_peek_ag(mp, old_ag),
+				ag, xfs_filestream_peek_ag(mp, ag));
+		return 0;
+	}
+
+	item = kmem_zone_zalloc(item_zone, KM_MAYFAIL);
+	if (!item)
+		return ENOMEM;
+
+	item->ag = ag;
+	item->ip = ip;
+	item->pip = pip;
+
+	err = xfs_mru_cache_insert(cache, ip->i_ino, item);
+	if (err) {
+		kmem_zone_free(item_zone, item);
+		return err;
+	}
+
+	/* Take a reference on the AG. */
+	xfs_filestream_get_ag(mp, ag);
+
+	/*
+	 * Take a reference on the inode itself regardless of whether it's a
+	 * regular file or a directory.
+	 */
+	IHOLD(ip);
+
+	/*
+	 * In the case of a regular file, take a reference on the parent inode
+	 * as well to ensure it remains in-core.
+	 */
+	if (pip)
+		IHOLD(pip);
+
+	TRACE_UPDATE(mp, ip, ag, xfs_filestream_peek_ag(mp, ag),
+			ag, xfs_filestream_peek_ag(mp, ag));
+
+	return 0;
+}
+
+/* xfs_fstrm_free_func(): callback for freeing cached stream items. */
+void
+xfs_fstrm_free_func(
+	xfs_ino_t	ino,
+	fstrm_item_t	*item)
+{
+	xfs_inode_t	*ip = item->ip;
+	int ref;
+
+	ASSERT(ip->i_ino == ino);
+
+	xfs_iflags_clear(ip, XFS_IFILESTREAM);
+
+	/* Drop the reference taken on the AG when the item was added. */
+	ref = xfs_filestream_put_ag(ip->i_mount, item->ag);
+
+	ASSERT(ref >= 0);
+	TRACE_FREE(ip->i_mount, ip, item->pip, item->ag,
+		xfs_filestream_peek_ag(ip->i_mount, item->ag));
+
+	/*
+	 * _xfs_filestream_update_ag() always takes a reference on the inode
+	 * itself, whether it's a file or a directory.  Release it here.
+	 * This can result in the inode being freed and so we must
+	 * not hold any inode locks when freeing filesstreams objects
+	 * otherwise we can deadlock here.
+	 */
+	IRELE(ip);
+
+	/*
+	 * In the case of a regular file, _xfs_filestream_update_ag() also
+	 * takes a ref on the parent inode to keep it in-core.  Release that
+	 * too.
+	 */
+	if (item->pip)
+		IRELE(item->pip);
+
+	/* Finally, free the memory allocated for the item. */
+	kmem_zone_free(item_zone, item);
+}
+
+/*
+ * xfs_filestream_init() is called at xfs initialisation time to set up the
+ * memory zone that will be used for filestream data structure allocation.
+ */
+int
+xfs_filestream_init(void)
+{
+	item_zone = kmem_zone_init(sizeof(fstrm_item_t), "fstrm_item");
+#ifdef XFS_FILESTREAMS_TRACE
+	xfs_filestreams_trace_buf = ktrace_alloc(XFS_FSTRM_KTRACE_SIZE, KM_SLEEP);
+#endif
+	return item_zone ? 0 : -ENOMEM;
+}
+
+/*
+ * xfs_filestream_uninit() is called at xfs termination time to destroy the
+ * memory zone that was used for filestream data structure allocation.
+ */
+void
+xfs_filestream_uninit(void)
+{
+#ifdef XFS_FILESTREAMS_TRACE
+	ktrace_free(xfs_filestreams_trace_buf);
+#endif
+	kmem_zone_destroy(item_zone);
+}
+
+/*
+ * xfs_filestream_mount() is called when a file system is mounted with the
+ * filestream option.  It is responsible for allocating the data structures
+ * needed to track the new file system's file streams.
+ */
+int
+xfs_filestream_mount(
+	xfs_mount_t	*mp)
+{
+	int		err;
+	unsigned int	lifetime, grp_count;
+
+	/*
+	 * The filestream timer tunable is currently fixed within the range of
+	 * one second to four minutes, with five seconds being the default.  The
+	 * group count is somewhat arbitrary, but it'd be nice to adhere to the
+	 * timer tunable to within about 10 percent.  This requires at least 10
+	 * groups.
+	 */
+	lifetime  = xfs_fstrm_centisecs * 10;
+	grp_count = 10;
+
+	err = xfs_mru_cache_create(&mp->m_filestream, lifetime, grp_count,
+	                     (xfs_mru_cache_free_func_t)xfs_fstrm_free_func);
+
+	return err;
+}
+
+/*
+ * xfs_filestream_unmount() is called when a file system that was mounted with
+ * the filestream option is unmounted.  It drains the data structures created
+ * to track the file system's file streams and frees all the memory that was
+ * allocated.
+ */
+void
+xfs_filestream_unmount(
+	xfs_mount_t	*mp)
+{
+	xfs_mru_cache_destroy(mp->m_filestream);
+}
+
+/*
+ * If the mount point's m_perag array is going to be reallocated, all
+ * outstanding cache entries must be flushed to avoid accessing reference count
+ * addresses that have been freed.  The call to xfs_filestream_flush() must be
+ * made inside the block that holds the m_peraglock in write mode to do the
+ * reallocation.
+ */
+void
+xfs_filestream_flush(
+	xfs_mount_t	*mp)
+{
+	/* point in time flush, so keep the reaper running */
+	xfs_mru_cache_flush(mp->m_filestream, 1);
+}
+
+/*
+ * Return the AG of the filestream the file or directory belongs to, or
+ * NULLAGNUMBER otherwise.
+ */
+xfs_agnumber_t
+xfs_filestream_lookup_ag(
+	xfs_inode_t	*ip)
+{
+	xfs_mru_cache_t	*cache;
+	fstrm_item_t	*item;
+	xfs_agnumber_t	ag;
+	int		ref;
+
+	if (!(ip->i_d.di_mode & (S_IFREG | S_IFDIR))) {
+		ASSERT(0);
+		return NULLAGNUMBER;
+	}
+
+	cache = ip->i_mount->m_filestream;
+	item = xfs_mru_cache_lookup(cache, ip->i_ino);
+	if (!item) {
+		TRACE_LOOKUP(ip->i_mount, ip, NULL, NULLAGNUMBER, 0);
+		return NULLAGNUMBER;
+	}
+
+	ASSERT(ip == item->ip);
+	ag = item->ag;
+	ref = xfs_filestream_peek_ag(ip->i_mount, ag);
+	xfs_mru_cache_done(cache);
+
+	TRACE_LOOKUP(ip->i_mount, ip, item->pip, ag, ref);
+	return ag;
+}
+
+/*
+ * xfs_filestream_associate() should only be called to associate a regular file
+ * with its parent directory.  Calling it with a child directory isn't
+ * appropriate because filestreams don't apply to entire directory hierarchies.
+ * Creating a file in a child directory of an existing filestream directory
+ * starts a new filestream with its own allocation group association.
+ *
+ * Returns < 0 on error, 0 if successful association occurred, > 0 if
+ * we failed to get an association because of locking issues.
+ */
+int
+xfs_filestream_associate(
+	xfs_inode_t	*pip,
+	xfs_inode_t	*ip)
+{
+	xfs_mount_t	*mp;
+	xfs_mru_cache_t	*cache;
+	fstrm_item_t	*item;
+	xfs_agnumber_t	ag, rotorstep, startag;
+	int		err = 0;
+
+	ASSERT(pip->i_d.di_mode & S_IFDIR);
+	ASSERT(ip->i_d.di_mode & S_IFREG);
+	if (!(pip->i_d.di_mode & S_IFDIR) || !(ip->i_d.di_mode & S_IFREG))
+		return -EINVAL;
+
+	mp = pip->i_mount;
+	cache = mp->m_filestream;
+	down_read(&mp->m_peraglock);
+
+	/*
+	 * We have a problem, Houston.
+	 *
+	 * Taking the iolock here violates inode locking order - we already
+	 * hold the ilock. Hence if we block getting this lock we may never
+	 * wake. Unfortunately, that means if we can't get the lock, we're
+	 * screwed in terms of getting a stream association - we can't spin
+	 * waiting for the lock because someone else is waiting on the lock we
+	 * hold and we cannot drop that as we are in a transaction here.
+	 *
+	 * Lucky for us, this inversion is rarely a problem because it's a
+	 * directory inode that we are trying to lock here and that means the
+	 * only place that matters is xfs_sync_inodes() and SYNC_DELWRI is
+	 * used. i.e. freeze, remount-ro, quotasync or unmount.
+	 *
+	 * So, if we can't get the iolock without sleeping then just give up
+	 */
+	if (!xfs_ilock_nowait(pip, XFS_IOLOCK_EXCL)) {
+		up_read(&mp->m_peraglock);
+		return 1;
+	}
+
+	/* If the parent directory is already in the cache, use its AG. */
+	item = xfs_mru_cache_lookup(cache, pip->i_ino);
+	if (item) {
+		ASSERT(item->ip == pip);
+		ag = item->ag;
+		xfs_mru_cache_done(cache);
+
+		TRACE_LOOKUP(mp, pip, pip, ag, xfs_filestream_peek_ag(mp, ag));
+		err = _xfs_filestream_update_ag(ip, pip, ag);
+
+		goto exit;
+	}
+
+	/*
+	 * Set the starting AG using the rotor for inode32, otherwise
+	 * use the directory inode's AG.
+	 */
+	if (mp->m_flags & XFS_MOUNT_32BITINODES) {
+		rotorstep = xfs_rotorstep;
+		startag = (mp->m_agfrotor / rotorstep) % mp->m_sb.sb_agcount;
+		mp->m_agfrotor = (mp->m_agfrotor + 1) %
+		                 (mp->m_sb.sb_agcount * rotorstep);
+	} else
+		startag = XFS_INO_TO_AGNO(mp, pip->i_ino);
+
+	/* Pick a new AG for the parent inode starting at startag. */
+	err = _xfs_filestream_pick_ag(mp, startag, &ag, 0, 0);
+	if (err || ag == NULLAGNUMBER)
+		goto exit_did_pick;
+
+	/* Associate the parent inode with the AG. */
+	err = _xfs_filestream_update_ag(pip, NULL, ag);
+	if (err)
+		goto exit_did_pick;
+
+	/* Associate the file inode with the AG. */
+	err = _xfs_filestream_update_ag(ip, pip, ag);
+	if (err)
+		goto exit_did_pick;
+
+	TRACE_ASSOCIATE(mp, ip, pip, ag, xfs_filestream_peek_ag(mp, ag));
+
+exit_did_pick:
+	/*
+	 * If _xfs_filestream_pick_ag() returned a valid AG, remove the
+	 * reference it took on it, since the file and directory will have taken
+	 * their own now if they were successfully cached.
+	 */
+	if (ag != NULLAGNUMBER)
+		xfs_filestream_put_ag(mp, ag);
+
+exit:
+	xfs_iunlock(pip, XFS_IOLOCK_EXCL);
+	up_read(&mp->m_peraglock);
+	return -err;
+}
+
+/*
+ * Pick a new allocation group for the current file and its file stream.  This
+ * function is called by xfs_bmap_filestreams() with the mount point's per-ag
+ * lock held.
+ */
+int
+xfs_filestream_new_ag(
+	xfs_bmalloca_t	*ap,
+	xfs_agnumber_t	*agp)
+{
+	int		flags, err;
+	xfs_inode_t	*ip, *pip = NULL;
+	xfs_mount_t	*mp;
+	xfs_mru_cache_t	*cache;
+	xfs_extlen_t	minlen;
+	fstrm_item_t	*dir, *file;
+	xfs_agnumber_t	ag = NULLAGNUMBER;
+
+	ip = ap->ip;
+	mp = ip->i_mount;
+	cache = mp->m_filestream;
+	minlen = ap->alen;
+	*agp = NULLAGNUMBER;
+
+	/*
+	 * Look for the file in the cache, removing it if it's found.  Doing
+	 * this allows it to be held across the dir lookup that follows.
+	 */
+	file = xfs_mru_cache_remove(cache, ip->i_ino);
+	if (file) {
+		ASSERT(ip == file->ip);
+
+		/* Save the file's parent inode and old AG number for later. */
+		pip = file->pip;
+		ag = file->ag;
+
+		/* Look for the file's directory in the cache. */
+		dir = xfs_mru_cache_lookup(cache, pip->i_ino);
+		if (dir) {
+			ASSERT(pip == dir->ip);
+
+			/*
+			 * If the directory has already moved on to a new AG,
+			 * use that AG as the new AG for the file. Don't
+			 * forget to twiddle the AG refcounts to match the
+			 * movement.
+			 */
+			if (dir->ag != file->ag) {
+				xfs_filestream_put_ag(mp, file->ag);
+				xfs_filestream_get_ag(mp, dir->ag);
+				*agp = file->ag = dir->ag;
+			}
+
+			xfs_mru_cache_done(cache);
+		}
+
+		/*
+		 * Put the file back in the cache.  If this fails, the free
+		 * function needs to be called to tidy up in the same way as if
+		 * the item had simply expired from the cache.
+		 */
+		err = xfs_mru_cache_insert(cache, ip->i_ino, file);
+		if (err) {
+			xfs_fstrm_free_func(ip->i_ino, file);
+			return err;
+		}
+
+		/*
+		 * If the file's AG was moved to the directory's new AG, there's
+		 * nothing more to be done.
+		 */
+		if (*agp != NULLAGNUMBER) {
+			TRACE_MOVEAG(mp, ip, pip,
+					ag, xfs_filestream_peek_ag(mp, ag),
+					*agp, xfs_filestream_peek_ag(mp, *agp));
+			return 0;
+		}
+	}
+
+	/*
+	 * If the file's parent directory is known, take its iolock in exclusive
+	 * mode to prevent two sibling files from racing each other to migrate
+	 * themselves and their parent to different AGs.
+	 */
+	if (pip)
+		xfs_ilock(pip, XFS_IOLOCK_EXCL);
+
+	/*
+	 * A new AG needs to be found for the file.  If the file's parent
+	 * directory is also known, it will be moved to the new AG as well to
+	 * ensure that files created inside it in future use the new AG.
+	 */
+	ag = (ag == NULLAGNUMBER) ? 0 : (ag + 1) % mp->m_sb.sb_agcount;
+	flags = (ap->userdata ? XFS_PICK_USERDATA : 0) |
+	        (ap->low ? XFS_PICK_LOWSPACE : 0);
+
+	err = _xfs_filestream_pick_ag(mp, ag, agp, flags, minlen);
+	if (err || *agp == NULLAGNUMBER)
+		goto exit;
+
+	/*
+	 * If the file wasn't found in the file cache, then its parent directory
+	 * inode isn't known.  For this to have happened, the file must either
+	 * be pre-existing, or it was created long enough ago that its cache
+	 * entry has expired.  This isn't the sort of usage that the filestreams
+	 * allocator is trying to optimise, so there's no point trying to track
+	 * its new AG somehow in the filestream data structures.
+	 */
+	if (!pip) {
+		TRACE_ORPHAN(mp, ip, *agp);
+		goto exit;
+	}
+
+	/* Associate the parent inode with the AG. */
+	err = _xfs_filestream_update_ag(pip, NULL, *agp);
+	if (err)
+		goto exit;
+
+	/* Associate the file inode with the AG. */
+	err = _xfs_filestream_update_ag(ip, pip, *agp);
+	if (err)
+		goto exit;
+
+	TRACE_MOVEAG(mp, ip, pip, NULLAGNUMBER, 0,
+			*agp, xfs_filestream_peek_ag(mp, *agp));
+
+exit:
+	/*
+	 * If _xfs_filestream_pick_ag() returned a valid AG, remove the
+	 * reference it took on it, since the file and directory will have taken
+	 * their own now if they were successfully cached.
+	 */
+	if (*agp != NULLAGNUMBER)
+		xfs_filestream_put_ag(mp, *agp);
+	else
+		*agp = 0;
+
+	if (pip)
+		xfs_iunlock(pip, XFS_IOLOCK_EXCL);
+
+	return err;
+}
+
+/*
+ * Remove an association between an inode and a filestream object.
+ * Typically this is done on last close of an unlinked file.
+ */
+void
+xfs_filestream_deassociate(
+	xfs_inode_t	*ip)
+{
+	xfs_mru_cache_t	*cache = ip->i_mount->m_filestream;
+
+	xfs_mru_cache_delete(cache, ip->i_ino);
+}
diff --git a/fs/xfs/xfs_filestream.h b/fs/xfs/xfs_filestream.h
new file mode 100644
index 0000000..f655f7d
--- /dev/null
+++ b/fs/xfs/xfs_filestream.h
@@ -0,0 +1,136 @@
+/*
+ * Copyright (c) 2006-2007 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#ifndef __XFS_FILESTREAM_H__
+#define __XFS_FILESTREAM_H__
+
+#ifdef __KERNEL__
+
+struct xfs_mount;
+struct xfs_inode;
+struct xfs_perag;
+struct xfs_bmalloca;
+
+#ifdef XFS_FILESTREAMS_TRACE
+#define XFS_FSTRM_KTRACE_INFO		1
+#define XFS_FSTRM_KTRACE_AGSCAN		2
+#define XFS_FSTRM_KTRACE_AGPICK1	3
+#define XFS_FSTRM_KTRACE_AGPICK2	4
+#define XFS_FSTRM_KTRACE_UPDATE		5
+#define XFS_FSTRM_KTRACE_FREE		6
+#define	XFS_FSTRM_KTRACE_ITEM_LOOKUP	7
+#define	XFS_FSTRM_KTRACE_ASSOCIATE	8
+#define	XFS_FSTRM_KTRACE_MOVEAG		9
+#define	XFS_FSTRM_KTRACE_ORPHAN		10
+
+#define XFS_FSTRM_KTRACE_SIZE	16384
+extern ktrace_t *xfs_filestreams_trace_buf;
+
+#endif
+
+/*
+ * Allocation group filestream associations are tracked with per-ag atomic
+ * counters.  These counters allow _xfs_filestream_pick_ag() to tell whether a
+ * particular AG already has active filestreams associated with it. The mount
+ * point's m_peraglock is used to protect these counters from per-ag array
+ * re-allocation during a growfs operation.  When xfs_growfs_data_private() is
+ * about to reallocate the array, it calls xfs_filestream_flush() with the
+ * m_peraglock held in write mode.
+ *
+ * Since xfs_mru_cache_flush() guarantees that all the free functions for all
+ * the cache elements have finished executing before it returns, it's safe for
+ * the free functions to use the atomic counters without m_peraglock protection.
+ * This allows the implementation of xfs_fstrm_free_func() to be agnostic about
+ * whether it was called with the m_peraglock held in read mode, write mode or
+ * not held at all.  The race condition this addresses is the following:
+ *
+ *  - The work queue scheduler fires and pulls a filestream directory cache
+ *    element off the LRU end of the cache for deletion, then gets pre-empted.
+ *  - A growfs operation grabs the m_peraglock in write mode, flushes all the
+ *    remaining items from the cache and reallocates the mount point's per-ag
+ *    array, resetting all the counters to zero.
+ *  - The work queue thread resumes and calls the free function for the element
+ *    it started cleaning up earlier.  In the process it decrements the
+ *    filestreams counter for an AG that now has no references.
+ *
+ * With a shrinkfs feature, the above scenario could panic the system.
+ *
+ * All other uses of the following macros should be protected by either the
+ * m_peraglock held in read mode, or the cache's internal locking exposed by the
+ * interval between a call to xfs_mru_cache_lookup() and a call to
+ * xfs_mru_cache_done().  In addition, the m_peraglock must be held in read mode
+ * when new elements are added to the cache.
+ *
+ * Combined, these locking rules ensure that no associations will ever exist in
+ * the cache that reference per-ag array elements that have since been
+ * reallocated.
+ */
+STATIC_INLINE int
+xfs_filestream_peek_ag(
+	xfs_mount_t	*mp,
+	xfs_agnumber_t	agno)
+{
+	return atomic_read(&mp->m_perag[agno].pagf_fstrms);
+}
+
+STATIC_INLINE int
+xfs_filestream_get_ag(
+	xfs_mount_t	*mp,
+	xfs_agnumber_t	agno)
+{
+	return atomic_inc_return(&mp->m_perag[agno].pagf_fstrms);
+}
+
+STATIC_INLINE int
+xfs_filestream_put_ag(
+	xfs_mount_t	*mp,
+	xfs_agnumber_t	agno)
+{
+	return atomic_dec_return(&mp->m_perag[agno].pagf_fstrms);
+}
+
+/* allocation selection flags */
+typedef enum xfs_fstrm_alloc {
+	XFS_PICK_USERDATA = 1,
+	XFS_PICK_LOWSPACE = 2,
+} xfs_fstrm_alloc_t;
+
+/* prototypes for filestream.c */
+int xfs_filestream_init(void);
+void xfs_filestream_uninit(void);
+int xfs_filestream_mount(struct xfs_mount *mp);
+void xfs_filestream_unmount(struct xfs_mount *mp);
+void xfs_filestream_flush(struct xfs_mount *mp);
+xfs_agnumber_t xfs_filestream_lookup_ag(struct xfs_inode *ip);
+int xfs_filestream_associate(struct xfs_inode *dip, struct xfs_inode *ip);
+void xfs_filestream_deassociate(struct xfs_inode *ip);
+int xfs_filestream_new_ag(struct xfs_bmalloca *ap, xfs_agnumber_t *agp);
+
+
+/* filestreams for the inode? */
+STATIC_INLINE int
+xfs_inode_is_filestream(
+	struct xfs_inode	*ip)
+{
+	return (ip->i_mount->m_flags & XFS_MOUNT_FILESTREAMS) ||
+		xfs_iflags_test(ip, XFS_IFILESTREAM) ||
+		(ip->i_d.di_flags & XFS_DIFLAG_FILESTREAM);
+}
+
+#endif /* __KERNEL__ */
+
+#endif /* __XFS_FILESTREAM_H__ */
diff --git a/fs/xfs/xfs_fs.h b/fs/xfs/xfs_fs.h
index 1335449..ec3c9c2 100644
--- a/fs/xfs/xfs_fs.h
+++ b/fs/xfs/xfs_fs.h
@@ -66,6 +66,7 @@ struct fsxattr {
 #define XFS_XFLAG_EXTSIZE	0x00000800	/* extent size allocator hint */
 #define XFS_XFLAG_EXTSZINHERIT	0x00001000	/* inherit inode extent size */
 #define XFS_XFLAG_NODEFRAG	0x00002000  	/* do not defragment */
+#define XFS_XFLAG_FILESTREAM	0x00004000	/* use filestream allocator */
 #define XFS_XFLAG_HASATTR	0x80000000	/* no DIFLAG for this	*/
 
 /*
@@ -238,6 +239,7 @@ typedef struct xfs_fsop_resblks {
 #define XFS_FSOP_GEOM_FLAGS_LOGV2	0x0100	/* log format version 2	*/
 #define XFS_FSOP_GEOM_FLAGS_SECTOR	0x0200	/* sector sizes >1BB	*/
 #define XFS_FSOP_GEOM_FLAGS_ATTR2	0x0400	/* inline attributes rework */
+#define XFS_FSOP_GEOM_FLAGS_LAZYSB	0x4000	/* lazy superblock counters */
 
 
 /*
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index b599e6b..432e823 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -44,6 +44,7 @@
 #include "xfs_trans_space.h"
 #include "xfs_rtalloc.h"
 #include "xfs_rw.h"
+#include "xfs_filestream.h"
 
 /*
  * File system operations
@@ -94,6 +95,8 @@ xfs_fs_geometry(
 				XFS_FSOP_GEOM_FLAGS_DIRV2 : 0) |
 			(XFS_SB_VERSION_HASSECTOR(&mp->m_sb) ?
 				XFS_FSOP_GEOM_FLAGS_SECTOR : 0) |
+			(xfs_sb_version_haslazysbcount(&mp->m_sb) ?
+				XFS_FSOP_GEOM_FLAGS_LAZYSB : 0) |
 			(XFS_SB_VERSION_HASATTR2(&mp->m_sb) ?
 				XFS_FSOP_GEOM_FLAGS_ATTR2 : 0);
 		geo->logsectsize = XFS_SB_VERSION_HASSECTOR(&mp->m_sb) ?
@@ -140,6 +143,8 @@ xfs_growfs_data_private(
 	pct = in->imaxpct;
 	if (nb < mp->m_sb.sb_dblocks || pct < 0 || pct > 100)
 		return XFS_ERROR(EINVAL);
+	if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb)))
+		return error;
 	dpct = pct - mp->m_sb.sb_imax_pct;
 	error = xfs_read_buf(mp, mp->m_ddev_targp,
 			XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
@@ -161,6 +166,7 @@ xfs_growfs_data_private(
 	new = nb - mp->m_sb.sb_dblocks;
 	oagcount = mp->m_sb.sb_agcount;
 	if (nagcount > oagcount) {
+		xfs_filestream_flush(mp);
 		down_write(&mp->m_peraglock);
 		mp->m_perag = kmem_realloc(mp->m_perag,
 			sizeof(xfs_perag_t) * nagcount,
@@ -173,6 +179,7 @@ xfs_growfs_data_private(
 		up_write(&mp->m_peraglock);
 	}
 	tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS);
+	tp->t_flags |= XFS_TRANS_RESERVE;
 	if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp),
 			XFS_GROWDATA_LOG_RES(mp), 0, 0, 0))) {
 		xfs_trans_cancel(tp, 0);
@@ -328,6 +335,7 @@ xfs_growfs_data_private(
 		be32_add(&agf->agf_length, new);
 		ASSERT(be32_to_cpu(agf->agf_length) ==
 		       be32_to_cpu(agi->agi_length));
+		xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
 		/*
 		 * Free the new space.
 		 */
@@ -494,8 +502,9 @@ xfs_reserve_blocks(
 	unsigned long		s;
 
 	/* If inval is null, report current values and return */
-
 	if (inval == (__uint64_t *)NULL) {
+		if (!outval)
+			return EINVAL;
 		outval->resblks = mp->m_resblks;
 		outval->resblks_avail = mp->m_resblks_avail;
 		return 0;
@@ -558,8 +567,10 @@ retry:
 		}
 	}
 out:
-	outval->resblks = mp->m_resblks;
-	outval->resblks_avail = mp->m_resblks_avail;
+	if (outval) {
+		outval->resblks = mp->m_resblks;
+		outval->resblks_avail = mp->m_resblks_avail;
+	}
 	XFS_SB_UNLOCK(mp, s);
 
 	if (fdblks_delta) {
diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c
index b5feb3e..f943368 100644
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/xfs_ialloc.c
@@ -123,6 +123,7 @@ xfs_ialloc_ag_alloc(
 	int		blks_per_cluster;  /* fs blocks per inode cluster */
 	xfs_btree_cur_t	*cur;		/* inode btree cursor */
 	xfs_daddr_t	d;		/* disk addr of buffer */
+	xfs_agnumber_t	agno;
 	int		error;
 	xfs_buf_t	*fbuf;		/* new free inodes' buffer */
 	xfs_dinode_t	*free;		/* new free inode structure */
@@ -302,15 +303,15 @@ xfs_ialloc_ag_alloc(
 	}
 	be32_add(&agi->agi_count, newlen);
 	be32_add(&agi->agi_freecount, newlen);
+	agno = be32_to_cpu(agi->agi_seqno);
 	down_read(&args.mp->m_peraglock);
-	args.mp->m_perag[be32_to_cpu(agi->agi_seqno)].pagi_freecount += newlen;
+	args.mp->m_perag[agno].pagi_freecount += newlen;
 	up_read(&args.mp->m_peraglock);
 	agi->agi_newino = cpu_to_be32(newino);
 	/*
 	 * Insert records describing the new inode chunk into the btree.
 	 */
-	cur = xfs_btree_init_cursor(args.mp, tp, agbp,
-			be32_to_cpu(agi->agi_seqno),
+	cur = xfs_btree_init_cursor(args.mp, tp, agbp, agno,
 			XFS_BTNUM_INO, (xfs_inode_t *)0, 0);
 	for (thisino = newino;
 	     thisino < newino + newlen;
@@ -1387,6 +1388,7 @@ xfs_ialloc_read_agi(
 	pag = &mp->m_perag[agno];
 	if (!pag->pagi_init) {
 		pag->pagi_freecount = be32_to_cpu(agi->agi_freecount);
+		pag->pagi_count = be32_to_cpu(agi->agi_count);
 		pag->pagi_init = 1;
 	} else {
 		/*
@@ -1410,3 +1412,23 @@ xfs_ialloc_read_agi(
 	*bpp = bp;
 	return 0;
 }
+
+/*
+ * Read in the agi to initialise the per-ag data in the mount structure
+ */
+int
+xfs_ialloc_pagi_init(
+	xfs_mount_t	*mp,		/* file system mount structure */
+	xfs_trans_t	*tp,		/* transaction pointer */
+	xfs_agnumber_t	agno)		/* allocation group number */
+{
+	xfs_buf_t	*bp = NULL;
+	int		error;
+
+	error = xfs_ialloc_read_agi(mp, tp, agno, &bp);
+	if (error)
+		return error;
+	if (bp)
+		xfs_trans_brelse(tp, bp);
+	return 0;
+}
diff --git a/fs/xfs/xfs_ialloc.h b/fs/xfs/xfs_ialloc.h
index 7f5debe..97f4040 100644
--- a/fs/xfs/xfs_ialloc.h
+++ b/fs/xfs/xfs_ialloc.h
@@ -149,6 +149,16 @@ xfs_ialloc_read_agi(
 	xfs_agnumber_t	agno,		/* allocation group number */
 	struct xfs_buf	**bpp);		/* allocation group hdr buf */
 
+/*
+ * Read in the allocation group header to initialise the per-ag data
+ * in the mount structure
+ */
+int
+xfs_ialloc_pagi_init(
+	struct xfs_mount *mp,		/* file system mount structure */
+	struct xfs_trans *tp,		/* transaction pointer */
+        xfs_agnumber_t  agno);		/* allocation group number */
+
 #endif	/* __KERNEL__ */
 
 #endif	/* __XFS_IALLOC_H__ */
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 3ca5d43..cdc4c28 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -48,7 +48,9 @@
 #include "xfs_dir2_trace.h"
 #include "xfs_quota.h"
 #include "xfs_acl.h"
+#include "xfs_filestream.h"
 
+#include <linux/log2.h>
 
 kmem_zone_t *xfs_ifork_zone;
 kmem_zone_t *xfs_inode_zone;
@@ -643,8 +645,7 @@ xfs_iformat_extents(
 			ep->l1 = INT_GET(get_unaligned((__uint64_t*)&dp->l1),
 								ARCH_CONVERT);
 		}
-		xfs_bmap_trace_exlist("xfs_iformat_extents", ip, nex,
-			whichfork);
+		XFS_BMAP_TRACE_EXLIST(ip, nex, whichfork);
 		if (whichfork != XFS_DATA_FORK ||
 			XFS_EXTFMT_INODE(ip) == XFS_EXTFMT_NOSTATE)
 				if (unlikely(xfs_check_nostate_extents(
@@ -817,6 +818,8 @@ _xfs_dic2xflags(
 			flags |= XFS_XFLAG_EXTSZINHERIT;
 		if (di_flags & XFS_DIFLAG_NODEFRAG)
 			flags |= XFS_XFLAG_NODEFRAG;
+		if (di_flags & XFS_DIFLAG_FILESTREAM)
+			flags |= XFS_XFLAG_FILESTREAM;
 	}
 
 	return flags;
@@ -1074,6 +1077,11 @@ xfs_iread_extents(
  * also returns the [locked] bp pointing to the head of the freelist
  * as ialloc_context.  The caller should hold this buffer across
  * the commit and pass it back into this routine on the second call.
+ *
+ * If we are allocating quota inodes, we do not have a parent inode
+ * to attach to or associate with (i.e. pip == NULL) because they
+ * are not linked into the directory structure - they are attached
+ * directly to the superblock - and so have no parent.
  */
 int
 xfs_ialloc(
@@ -1099,7 +1107,7 @@ xfs_ialloc(
 	 * Call the space management code to pick
 	 * the on-disk inode to be allocated.
 	 */
-	error = xfs_dialloc(tp, pip->i_ino, mode, okalloc,
+	error = xfs_dialloc(tp, pip ? pip->i_ino : 0, mode, okalloc,
 			    ialloc_context, call_again, &ino);
 	if (error != 0) {
 		return error;
@@ -1150,10 +1158,10 @@ xfs_ialloc(
 	/*
 	 * Project ids won't be stored on disk if we are using a version 1 inode.
 	 */
-	if ( (prid != 0) && (ip->i_d.di_version == XFS_DINODE_VERSION_1))
+	if ((prid != 0) && (ip->i_d.di_version == XFS_DINODE_VERSION_1))
 		xfs_bump_ino_vers2(tp, ip);
 
-	if (XFS_INHERIT_GID(pip, vp->v_vfsp)) {
+	if (pip && XFS_INHERIT_GID(pip, vp->v_vfsp)) {
 		ip->i_d.di_gid = pip->i_d.di_gid;
 		if ((pip->i_d.di_mode & S_ISGID) && (mode & S_IFMT) == S_IFDIR) {
 			ip->i_d.di_mode |= S_ISGID;
@@ -1195,8 +1203,16 @@ xfs_ialloc(
 		flags |= XFS_ILOG_DEV;
 		break;
 	case S_IFREG:
+		if (pip && xfs_inode_is_filestream(pip)) {
+			error = xfs_filestream_associate(pip, ip);
+			if (error < 0)
+				return -error;
+			if (!error)
+				xfs_iflags_set(ip, XFS_IFILESTREAM);
+		}
+		/* fall through */
 	case S_IFDIR:
-		if (unlikely(pip->i_d.di_flags & XFS_DIFLAG_ANY)) {
+		if (pip && (pip->i_d.di_flags & XFS_DIFLAG_ANY)) {
 			uint	di_flags = 0;
 
 			if ((mode & S_IFMT) == S_IFDIR) {
@@ -1233,6 +1249,8 @@ xfs_ialloc(
 			if ((pip->i_d.di_flags & XFS_DIFLAG_NODEFRAG) &&
 			    xfs_inherit_nodefrag)
 				di_flags |= XFS_DIFLAG_NODEFRAG;
+			if (pip->i_d.di_flags & XFS_DIFLAG_FILESTREAM)
+				di_flags |= XFS_DIFLAG_FILESTREAM;
 			ip->i_d.di_flags |= di_flags;
 		}
 		/* FALLTHROUGH */
@@ -2875,9 +2893,6 @@ xfs_iextents_copy(
 	int			copied;
 	xfs_bmbt_rec_t		*dest_ep;
 	xfs_bmbt_rec_t		*ep;
-#ifdef XFS_BMAP_TRACE
-	static char		fname[] = "xfs_iextents_copy";
-#endif
 	int			i;
 	xfs_ifork_t		*ifp;
 	int			nrecs;
@@ -2888,7 +2903,7 @@ xfs_iextents_copy(
 	ASSERT(ifp->if_bytes > 0);
 
 	nrecs = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
-	xfs_bmap_trace_exlist(fname, ip, nrecs, whichfork);
+	XFS_BMAP_TRACE_EXLIST(ip, nrecs, whichfork);
 	ASSERT(nrecs > 0);
 
 	/*
@@ -4184,7 +4199,7 @@ xfs_iext_realloc_direct(
 			ifp->if_bytes = new_size;
 			return;
 		}
-		if ((new_size & (new_size - 1)) != 0) {
+		if (!is_power_of_2(new_size)){
 			rnew_size = xfs_iroundup(new_size);
 		}
 		if (rnew_size != ifp->if_real_bytes) {
@@ -4207,7 +4222,7 @@ xfs_iext_realloc_direct(
 	 */
 	else {
 		new_size += ifp->if_bytes;
-		if ((new_size & (new_size - 1)) != 0) {
+		if (!is_power_of_2(new_size)) {
 			rnew_size = xfs_iroundup(new_size);
 		}
 		xfs_iext_inline_to_direct(ifp, rnew_size);
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index f75afec..012dfd4 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -379,6 +379,7 @@ xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
 #define XFS_ISTALE	0x0010	/* inode has been staled */
 #define XFS_IRECLAIMABLE 0x0020 /* inode can be reclaimed */
 #define XFS_INEW	0x0040
+#define XFS_IFILESTREAM	0x0080	/* inode is in a filestream directory */
 
 /*
  * Flags for inode locking.
@@ -414,19 +415,22 @@ xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
  * gets a lockdep subclass of 1 and the second lock will have a lockdep
  * subclass of 0.
  *
- * XFS_I[O]LOCK_INUMORDER - for locking several inodes at the some time
+ * XFS_LOCK_INUMORDER - for locking several inodes at the some time
  * with xfs_lock_inodes().  This flag is used as the starting subclass
  * and each subsequent lock acquired will increment the subclass by one.
  * So the first lock acquired will have a lockdep subclass of 2, the
- * second lock will have a lockdep subclass of 3, and so on.
+ * second lock will have a lockdep subclass of 3, and so on. It is
+ * the responsibility of the class builder to shift this to the correct
+ * portion of the lock_mode lockdep mask.
  */
+#define XFS_LOCK_PARENT		1
+#define XFS_LOCK_INUMORDER	2
+
 #define XFS_IOLOCK_SHIFT	16
-#define	XFS_IOLOCK_PARENT	(1 << XFS_IOLOCK_SHIFT)
-#define	XFS_IOLOCK_INUMORDER	(2 << XFS_IOLOCK_SHIFT)
+#define	XFS_IOLOCK_PARENT	(XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
 
 #define XFS_ILOCK_SHIFT		24
-#define	XFS_ILOCK_PARENT	(1 << XFS_ILOCK_SHIFT)
-#define	XFS_ILOCK_INUMORDER	(2 << XFS_ILOCK_SHIFT)
+#define	XFS_ILOCK_PARENT	(XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
 
 #define XFS_IOLOCK_DEP_MASK	0x00ff0000
 #define XFS_ILOCK_DEP_MASK	0xff000000
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 3f2b9f2..bf57b75 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -451,19 +451,14 @@ xfs_iomap_write_direct(
 		return XFS_ERROR(error);
 
 	rt = XFS_IS_REALTIME_INODE(ip);
-	if (unlikely(rt)) {
-		if (!(extsz = ip->i_d.di_extsize))
-			extsz = mp->m_sb.sb_rextsize;
-	} else {
-		extsz = ip->i_d.di_extsize;
-	}
+	extsz = xfs_get_extsz_hint(ip);
 
 	isize = ip->i_size;
 	if (io->io_new_size > isize)
 		isize = io->io_new_size;
 
-  	offset_fsb = XFS_B_TO_FSBT(mp, offset);
-  	last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count)));
+	offset_fsb = XFS_B_TO_FSBT(mp, offset);
+	last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count)));
 	if ((offset + count) > isize) {
 		error = xfs_iomap_eof_align_last_fsb(mp, io, isize, extsz,
 							&last_fsb);
@@ -489,13 +484,13 @@ xfs_iomap_write_direct(
 	if (unlikely(rt)) {
 		resrtextents = qblocks = resaligned;
 		resrtextents /= mp->m_sb.sb_rextsize;
-  		resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0);
-  		quota_flag = XFS_QMOPT_RES_RTBLKS;
-  	} else {
-  		resrtextents = 0;
+		resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0);
+		quota_flag = XFS_QMOPT_RES_RTBLKS;
+	} else {
+		resrtextents = 0;
 		resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resaligned);
-  		quota_flag = XFS_QMOPT_RES_REGBLKS;
-  	}
+		quota_flag = XFS_QMOPT_RES_REGBLKS;
+	}
 
 	/*
 	 * Allocate and setup the transaction
@@ -666,13 +661,7 @@ xfs_iomap_write_delay(
 	if (error)
 		return XFS_ERROR(error);
 
-	if (XFS_IS_REALTIME_INODE(ip)) {
-		if (!(extsz = ip->i_d.di_extsize))
-			extsz = mp->m_sb.sb_rextsize;
-	} else {
-		extsz = ip->i_d.di_extsize;
-	}
-
+	extsz = xfs_get_extsz_hint(ip);
 	offset_fsb = XFS_B_TO_FSBT(mp, offset);
 
 retry:
@@ -788,18 +777,12 @@ xfs_iomap_write_allocate(
 		nimaps = 0;
 		while (nimaps == 0) {
 			tp = xfs_trans_alloc(mp, XFS_TRANS_STRAT_WRITE);
+			tp->t_flags |= XFS_TRANS_RESERVE;
 			nres = XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK);
 			error = xfs_trans_reserve(tp, nres,
 					XFS_WRITE_LOG_RES(mp),
 					0, XFS_TRANS_PERM_LOG_RES,
 					XFS_WRITE_LOG_COUNT);
-			if (error == ENOSPC) {
-				error = xfs_trans_reserve(tp, 0,
-						XFS_WRITE_LOG_RES(mp),
-						0,
-						XFS_TRANS_PERM_LOG_RES,
-						XFS_WRITE_LOG_COUNT);
-			}
 			if (error) {
 				xfs_trans_cancel(tp, 0);
 				return XFS_ERROR(error);
@@ -917,8 +900,8 @@ xfs_iomap_write_unwritten(
 		 * from unwritten to real. Do allocations in a loop until
 		 * we have covered the range passed in.
 		 */
-
 		tp = xfs_trans_alloc(mp, XFS_TRANS_STRAT_WRITE);
+		tp->t_flags |= XFS_TRANS_RESERVE;
 		error = xfs_trans_reserve(tp, resblks,
 				XFS_WRITE_LOG_RES(mp), 0,
 				XFS_TRANS_PERM_LOG_RES,
diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index e725ddd..4c2454b 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -202,6 +202,16 @@ xfs_bulkstat_one_dinode(
 	return 0;
 }
 
+STATIC int
+xfs_bulkstat_one_fmt(
+	void			__user *ubuffer,
+	const xfs_bstat_t	*buffer)
+{
+	if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
+		return -EFAULT;
+	return sizeof(*buffer);
+}
+
 /*
  * Return stat information for one inode.
  * Return 0 if ok, else errno.
@@ -221,6 +231,7 @@ xfs_bulkstat_one(
 	xfs_bstat_t	*buf;		/* return buffer */
 	int		error = 0;	/* error value */
 	xfs_dinode_t	*dip;		/* dinode inode pointer */
+	bulkstat_one_fmt_pf formatter = private_data ? : xfs_bulkstat_one_fmt;
 
 	dip = (xfs_dinode_t *)dibuff;
 	*stat = BULKSTAT_RV_NOTHING;
@@ -243,14 +254,15 @@ xfs_bulkstat_one(
 		xfs_bulkstat_one_dinode(mp, ino, dip, buf);
 	}
 
-	if (copy_to_user(buffer, buf, sizeof(*buf)))  {
+	error = formatter(buffer, buf);
+	if (error < 0)  {
 		error = EFAULT;
 		goto out_free;
 	}
 
 	*stat = BULKSTAT_RV_DIDONE;
 	if (ubused)
-		*ubused = sizeof(*buf);
+		*ubused = error;
 
  out_free:
 	kmem_free(buf, sizeof(*buf));
@@ -748,6 +760,19 @@ xfs_bulkstat_single(
 	return 0;
 }
 
+int
+xfs_inumbers_fmt(
+	void			__user *ubuffer, /* buffer to write to */
+	const xfs_inogrp_t	*buffer,	/* buffer to read from */
+	long			count,		/* # of elements to read */
+	long			*written)	/* # of bytes written */
+{
+	if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
+		return -EFAULT;
+	*written = count * sizeof(*buffer);
+	return 0;
+}
+
 /*
  * Return inode number table for the filesystem.
  */
@@ -756,7 +781,8 @@ xfs_inumbers(
 	xfs_mount_t	*mp,		/* mount point for filesystem */
 	xfs_ino_t	*lastino,	/* last inode returned */
 	int		*count,		/* size of buffer/count returned */
-	xfs_inogrp_t	__user *ubuffer)/* buffer with inode descriptions */
+	void		__user *ubuffer,/* buffer with inode descriptions */
+	inumbers_fmt_pf	formatter)
 {
 	xfs_buf_t	*agbp;
 	xfs_agino_t	agino;
@@ -835,12 +861,12 @@ xfs_inumbers(
 		bufidx++;
 		left--;
 		if (bufidx == bcount) {
-			if (copy_to_user(ubuffer, buffer,
-					bufidx * sizeof(*buffer))) {
+			long written;
+			if (formatter(ubuffer, buffer, bufidx, &written)) {
 				error = XFS_ERROR(EFAULT);
 				break;
 			}
-			ubuffer += bufidx;
+			ubuffer += written;
 			*count += bufidx;
 			bufidx = 0;
 		}
@@ -862,8 +888,8 @@ xfs_inumbers(
 	}
 	if (!error) {
 		if (bufidx) {
-			if (copy_to_user(ubuffer, buffer,
-					bufidx * sizeof(*buffer)))
+			long written;
+			if (formatter(ubuffer, buffer, bufidx, &written))
 				error = XFS_ERROR(EFAULT);
 			else
 				*count += bufidx;
diff --git a/fs/xfs/xfs_itable.h b/fs/xfs/xfs_itable.h
index f25a288..a1f18fc 100644
--- a/fs/xfs/xfs_itable.h
+++ b/fs/xfs/xfs_itable.h
@@ -69,6 +69,10 @@ xfs_bulkstat_single(
 	char			__user *buffer,
 	int			*done);
 
+typedef int (*bulkstat_one_fmt_pf)(  /* used size in bytes or negative error */
+	void			__user *ubuffer, /* buffer to write to */
+	const xfs_bstat_t	*buffer);        /* buffer to read from */
+
 int
 xfs_bulkstat_one(
 	xfs_mount_t		*mp,
@@ -86,11 +90,25 @@ xfs_internal_inum(
 	xfs_mount_t		*mp,
 	xfs_ino_t		ino);
 
+typedef int (*inumbers_fmt_pf)(
+	void			__user *ubuffer, /* buffer to write to */
+	const xfs_inogrp_t	*buffer,	/* buffer to read from */
+	long			count,		/* # of elements to read */
+	long			*written);	/* # of bytes written */
+
+int
+xfs_inumbers_fmt(
+	void			__user *ubuffer, /* buffer to write to */
+	const xfs_inogrp_t	*buffer,	/* buffer to read from */
+	long			count,		/* # of elements to read */
+	long			*written);	/* # of bytes written */
+
 int					/* error status */
 xfs_inumbers(
 	xfs_mount_t		*mp,	/* mount point for filesystem */
 	xfs_ino_t		*last,	/* last inode returned */
 	int			*count,	/* size of buffer/count returned */
-	xfs_inogrp_t		__user *buffer);/* buffer with inode info */
+	void			__user *buffer, /* buffer with inode info */
+	inumbers_fmt_pf		formatter);
 
 #endif	/* __XFS_ITABLE_H__ */
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index c48bf61..9d4c4fb 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -817,10 +817,8 @@ xfs_log_need_covered(xfs_mount_t *mp)
 	SPLDECL(s);
 	int		needed = 0, gen;
 	xlog_t		*log = mp->m_log;
-	bhv_vfs_t	*vfsp = XFS_MTOVFS(mp);
 
-	if (vfs_test_for_freeze(vfsp) || XFS_FORCED_SHUTDOWN(mp) ||
-	    (vfsp->vfs_flag & VFS_RDONLY))
+	if (!xfs_fs_writable(mp))
 		return 0;
 
 	s = LOG_LOCK(log);
@@ -967,14 +965,16 @@ xlog_iodone(xfs_buf_t *bp)
 	} else if (iclog->ic_state & XLOG_STATE_IOERROR) {
 		aborted = XFS_LI_ABORTED;
 	}
+
+	/* log I/O is always issued ASYNC */
+	ASSERT(XFS_BUF_ISASYNC(bp));
 	xlog_state_done_syncing(iclog, aborted);
-	if (!(XFS_BUF_ISASYNC(bp))) {
-		/*
-		 * Corresponding psema() will be done in bwrite().  If we don't
-		 * vsema() here, panic.
-		 */
-		XFS_BUF_V_IODONESEMA(bp);
-	}
+	/*
+	 * do not reference the buffer (bp) here as we could race
+	 * with it being freed after writing the unmount record to the
+	 * log.
+	 */
+
 }	/* xlog_iodone */
 
 /*
@@ -1199,11 +1199,18 @@ xlog_alloc_log(xfs_mount_t	*mp,
 		*iclogp = (xlog_in_core_t *)
 			  kmem_zalloc(sizeof(xlog_in_core_t), KM_SLEEP);
 		iclog = *iclogp;
-		iclog->hic_data = (xlog_in_core_2_t *)
-			  kmem_zalloc(iclogsize, KM_SLEEP | KM_LARGE);
-
 		iclog->ic_prev = prev_iclog;
 		prev_iclog = iclog;
+
+		bp = xfs_buf_get_noaddr(log->l_iclog_size, mp->m_logdev_targp);
+		if (!XFS_BUF_CPSEMA(bp))
+			ASSERT(0);
+		XFS_BUF_SET_IODONE_FUNC(bp, xlog_iodone);
+		XFS_BUF_SET_BDSTRAT_FUNC(bp, xlog_bdstrat_cb);
+		XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1);
+		iclog->ic_bp = bp;
+		iclog->hic_data = bp->b_addr;
+
 		log->l_iclog_bak[i] = (xfs_caddr_t)&(iclog->ic_header);
 
 		head = &iclog->ic_header;
@@ -1216,11 +1223,6 @@ xlog_alloc_log(xfs_mount_t	*mp,
 		INT_SET(head->h_fmt, ARCH_CONVERT, XLOG_FMT);
 		memcpy(&head->h_fs_uuid, &mp->m_sb.sb_uuid, sizeof(uuid_t));
 
-		bp = xfs_buf_get_empty(log->l_iclog_size, mp->m_logdev_targp);
-		XFS_BUF_SET_IODONE_FUNC(bp, xlog_iodone);
-		XFS_BUF_SET_BDSTRAT_FUNC(bp, xlog_bdstrat_cb);
-		XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1);
-		iclog->ic_bp = bp;
 
 		iclog->ic_size = XFS_BUF_SIZE(bp) - log->l_iclog_hsize;
 		iclog->ic_state = XLOG_STATE_ACTIVE;
@@ -1432,7 +1434,7 @@ xlog_sync(xlog_t		*log,
 	} else {
 		iclog->ic_bwritecnt = 1;
 	}
-	XFS_BUF_SET_PTR(bp, (xfs_caddr_t) &(iclog->ic_header), count);
+	XFS_BUF_SET_COUNT(bp, count);
 	XFS_BUF_SET_FSPRIVATE(bp, iclog);	/* save for later */
 	XFS_BUF_ZEROFLAGS(bp);
 	XFS_BUF_BUSY(bp);
@@ -1528,7 +1530,6 @@ xlog_dealloc_log(xlog_t *log)
 		}
 #endif
 		next_iclog = iclog->ic_next;
-		kmem_free(iclog->hic_data, log->l_iclog_size);
 		kmem_free(iclog, sizeof(xlog_in_core_t));
 		iclog = next_iclog;
 	}
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 080fabf..fddbb09 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -927,6 +927,14 @@ xlog_find_tail(
 			ASSIGN_ANY_LSN_HOST(log->l_last_sync_lsn, log->l_curr_cycle,
 					after_umount_blk);
 			*tail_blk = after_umount_blk;
+
+			/*
+			 * Note that the unmount was clean. If the unmount
+			 * was not clean, we need to know this to rebuild the
+			 * superblock counters from the perag headers if we
+			 * have a filesystem using non-persistent counters.
+			 */
+			log->l_mp->m_flags |= XFS_MOUNT_WAS_CLEAN;
 		}
 	}
 
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index a96bde6..a66b398 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -202,6 +202,27 @@ xfs_mount_free(
 	kmem_free(mp, sizeof(xfs_mount_t));
 }
 
+/*
+ * Check size of device based on the (data/realtime) block count.
+ * Note: this check is used by the growfs code as well as mount.
+ */
+int
+xfs_sb_validate_fsb_count(
+	xfs_sb_t	*sbp,
+	__uint64_t	nblocks)
+{
+	ASSERT(PAGE_SHIFT >= sbp->sb_blocklog);
+	ASSERT(sbp->sb_blocklog >= BBSHIFT);
+
+#if XFS_BIG_BLKNOS     /* Limited by ULONG_MAX of page cache index */
+	if (nblocks >> (PAGE_CACHE_SHIFT - sbp->sb_blocklog) > ULONG_MAX)
+		return E2BIG;
+#else                  /* Limited by UINT_MAX of sectors */
+	if (nblocks << (sbp->sb_blocklog - BBSHIFT) > UINT_MAX)
+		return E2BIG;
+#endif
+	return 0;
+}
 
 /*
  * Check the validity of the SB found.
@@ -284,18 +305,8 @@ xfs_mount_validate_sb(
 		return XFS_ERROR(EFSCORRUPTED);
 	}
 
-	ASSERT(PAGE_SHIFT >= sbp->sb_blocklog);
-	ASSERT(sbp->sb_blocklog >= BBSHIFT);
-
-#if XFS_BIG_BLKNOS     /* Limited by ULONG_MAX of page cache index */
-	if (unlikely(
-	    (sbp->sb_dblocks >> (PAGE_SHIFT - sbp->sb_blocklog)) > ULONG_MAX ||
-	    (sbp->sb_rblocks >> (PAGE_SHIFT - sbp->sb_blocklog)) > ULONG_MAX)) {
-#else                  /* Limited by UINT_MAX of sectors */
-	if (unlikely(
-	    (sbp->sb_dblocks << (sbp->sb_blocklog - BBSHIFT)) > UINT_MAX ||
-	    (sbp->sb_rblocks << (sbp->sb_blocklog - BBSHIFT)) > UINT_MAX)) {
-#endif
+	if (xfs_sb_validate_fsb_count(sbp, sbp->sb_dblocks) ||
+	    xfs_sb_validate_fsb_count(sbp, sbp->sb_rblocks)) {
 		xfs_fs_mount_cmn_err(flags,
 			"file system too large to be mounted on this system.");
 		return XFS_ERROR(E2BIG);
@@ -632,6 +643,64 @@ xfs_mount_common(xfs_mount_t *mp, xfs_sb_t *sbp)
 					sbp->sb_inopblock);
 	mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog;
 }
+
+/*
+ * xfs_initialize_perag_data
+ *
+ * Read in each per-ag structure so we can count up the number of
+ * allocated inodes, free inodes and used filesystem blocks as this
+ * information is no longer persistent in the superblock. Once we have
+ * this information, write it into the in-core superblock structure.
+ */
+STATIC int
+xfs_initialize_perag_data(xfs_mount_t *mp, xfs_agnumber_t agcount)
+{
+	xfs_agnumber_t	index;
+	xfs_perag_t	*pag;
+	xfs_sb_t	*sbp = &mp->m_sb;
+	uint64_t	ifree = 0;
+	uint64_t	ialloc = 0;
+	uint64_t	bfree = 0;
+	uint64_t	bfreelst = 0;
+	uint64_t	btree = 0;
+	int		error;
+	int		s;
+
+	for (index = 0; index < agcount; index++) {
+		/*
+		 * read the agf, then the agi. This gets us
+		 * all the inforamtion we need and populates the
+		 * per-ag structures for us.
+		 */
+		error = xfs_alloc_pagf_init(mp, NULL, index, 0);
+		if (error)
+			return error;
+
+		error = xfs_ialloc_pagi_init(mp, NULL, index);
+		if (error)
+			return error;
+		pag = &mp->m_perag[index];
+		ifree += pag->pagi_freecount;
+		ialloc += pag->pagi_count;
+		bfree += pag->pagf_freeblks;
+		bfreelst += pag->pagf_flcount;
+		btree += pag->pagf_btreeblks;
+	}
+	/*
+	 * Overwrite incore superblock counters with just-read data
+	 */
+	s = XFS_SB_LOCK(mp);
+	sbp->sb_ifree = ifree;
+	sbp->sb_icount = ialloc;
+	sbp->sb_fdblocks = bfree + bfreelst + btree;
+	XFS_SB_UNLOCK(mp, s);
+
+	/* Fixup the per-cpu counters as well. */
+	xfs_icsb_reinit_counters(mp);
+
+	return 0;
+}
+
 /*
  * xfs_mountfs
  *
@@ -656,7 +725,7 @@ xfs_mountfs(
 	bhv_vnode_t	*rvp = NULL;
 	int		readio_log, writeio_log;
 	xfs_daddr_t	d;
-	__uint64_t	ret64;
+	__uint64_t	resblks;
 	__int64_t	update_flags;
 	uint		quotamount, quotaflags;
 	int		agno;
@@ -773,6 +842,7 @@ xfs_mountfs(
 	 */
 	if ((mfsi_flags & XFS_MFSI_SECOND) == 0 &&
 	    (mp->m_flags & XFS_MOUNT_NOUUID) == 0) {
+		__uint64_t	ret64;
 		if (xfs_uuid_mount(mp)) {
 			error = XFS_ERROR(EINVAL);
 			goto error1;
@@ -976,6 +1046,34 @@ xfs_mountfs(
 	}
 
 	/*
+	 * Now the log is mounted, we know if it was an unclean shutdown or
+	 * not. If it was, with the first phase of recovery has completed, we
+	 * have consistent AG blocks on disk. We have not recovered EFIs yet,
+	 * but they are recovered transactionally in the second recovery phase
+	 * later.
+	 *
+	 * Hence we can safely re-initialise incore superblock counters from
+	 * the per-ag data. These may not be correct if the filesystem was not
+	 * cleanly unmounted, so we need to wait for recovery to finish before
+	 * doing this.
+	 *
+	 * If the filesystem was cleanly unmounted, then we can trust the
+	 * values in the superblock to be correct and we don't need to do
+	 * anything here.
+	 *
+	 * If we are currently making the filesystem, the initialisation will
+	 * fail as the perag data is in an undefined state.
+	 */
+
+	if (xfs_sb_version_haslazysbcount(&mp->m_sb) &&
+	    !XFS_LAST_UNMOUNT_WAS_CLEAN(mp) &&
+	     !mp->m_sb.sb_inprogress) {
+		error = xfs_initialize_perag_data(mp, sbp->sb_agcount);
+		if (error) {
+			goto error2;
+		}
+	}
+	/*
 	 * Get and sanity-check the root inode.
 	 * Save the pointer to it in the mount structure.
 	 */
@@ -1044,6 +1142,23 @@ xfs_mountfs(
 	if ((error = XFS_QM_MOUNT(mp, quotamount, quotaflags, mfsi_flags)))
 		goto error4;
 
+	/*
+	 * Now we are mounted, reserve a small amount of unused space for
+	 * privileged transactions. This is needed so that transaction
+	 * space required for critical operations can dip into this pool
+	 * when at ENOSPC. This is needed for operations like create with
+	 * attr, unwritten extent conversion at ENOSPC, etc. Data allocations
+	 * are not allowed to use this reserved space.
+	 *
+	 * We default to 5% or 1024 fsbs of space reserved, whichever is smaller.
+	 * This may drive us straight to ENOSPC on mount, but that implies
+	 * we were already there on the last unmount.
+	 */
+	resblks = mp->m_sb.sb_dblocks;
+	do_div(resblks, 20);
+	resblks = min_t(__uint64_t, resblks, 1024);
+	xfs_reserve_blocks(mp, &resblks, NULL);
+
 	return 0;
 
  error4:
@@ -1083,7 +1198,19 @@ xfs_unmountfs(xfs_mount_t *mp, struct cred *cr)
 #if defined(DEBUG) || defined(INDUCE_IO_ERROR)
 	int64_t		fsid;
 #endif
+	__uint64_t	resblks;
 
+	/*
+	 * We can potentially deadlock here if we have an inode cluster
+	 * that has been freed has it's buffer still pinned in memory because
+	 * the transaction is still sitting in a iclog. The stale inodes
+	 * on that buffer will have their flush locks held until the
+	 * transaction hits the disk and the callbacks run. the inode
+	 * flush takes the flush lock unconditionally and with nothing to
+	 * push out the iclog we will never get that unlocked. hence we
+	 * need to force the log first.
+	 */
+	xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
 	xfs_iflush_all(mp);
 
 	XFS_QM_DQPURGEALL(mp, XFS_QMOPT_QUOTALL | XFS_QMOPT_UMOUNTING);
@@ -1100,10 +1227,26 @@ xfs_unmountfs(xfs_mount_t *mp, struct cred *cr)
 		xfs_binval(mp->m_rtdev_targp);
 	}
 
-	xfs_unmountfs_writesb(mp);
+	/*
+	 * Unreserve any blocks we have so that when we unmount we don't account
+	 * the reserved free space as used. This is really only necessary for
+	 * lazy superblock counting because it trusts the incore superblock
+	 * counters to be aboslutely correct on clean unmount.
+	 *
+	 * We don't bother correcting this elsewhere for lazy superblock
+	 * counting because on mount of an unclean filesystem we reconstruct the
+	 * correct counter value and this is irrelevant.
+	 *
+	 * For non-lazy counter filesystems, this doesn't matter at all because
+	 * we only every apply deltas to the superblock and hence the incore
+	 * value does not matter....
+	 */
+	resblks = 0;
+	xfs_reserve_blocks(mp, &resblks, NULL);
 
+	xfs_log_sbcount(mp, 1);
+	xfs_unmountfs_writesb(mp);
 	xfs_unmountfs_wait(mp); 		/* wait for async bufs */
-
 	xfs_log_unmount(mp);			/* Done! No more fs ops. */
 
 	xfs_freesb(mp);
@@ -1150,6 +1293,62 @@ xfs_unmountfs_wait(xfs_mount_t *mp)
 }
 
 int
+xfs_fs_writable(xfs_mount_t *mp)
+{
+	bhv_vfs_t	*vfsp = XFS_MTOVFS(mp);
+
+	return !(vfs_test_for_freeze(vfsp) || XFS_FORCED_SHUTDOWN(mp) ||
+		(vfsp->vfs_flag & VFS_RDONLY));
+}
+
+/*
+ * xfs_log_sbcount
+ *
+ * Called either periodically to keep the on disk superblock values
+ * roughly up to date or from unmount to make sure the values are
+ * correct on a clean unmount.
+ *
+ * Note this code can be called during the process of freezing, so
+ * we may need to use the transaction allocator which does not not
+ * block when the transaction subsystem is in its frozen state.
+ */
+int
+xfs_log_sbcount(
+	xfs_mount_t	*mp,
+	uint		sync)
+{
+	xfs_trans_t	*tp;
+	int		error;
+
+	if (!xfs_fs_writable(mp))
+		return 0;
+
+	xfs_icsb_sync_counters(mp);
+
+	/*
+	 * we don't need to do this if we are updating the superblock
+	 * counters on every modification.
+	 */
+	if (!xfs_sb_version_haslazysbcount(&mp->m_sb))
+		return 0;
+
+	tp = _xfs_trans_alloc(mp, XFS_TRANS_SB_COUNT);
+	error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
+					XFS_DEFAULT_LOG_COUNT);
+	if (error) {
+		xfs_trans_cancel(tp, 0);
+		return error;
+	}
+
+	xfs_mod_sb(tp, XFS_SB_IFREE | XFS_SB_ICOUNT | XFS_SB_FDBLOCKS);
+	if (sync)
+		xfs_trans_set_sync(tp);
+	xfs_trans_commit(tp, 0);
+
+	return 0;
+}
+
+int
 xfs_unmountfs_writesb(xfs_mount_t *mp)
 {
 	xfs_buf_t	*sbp;
@@ -1160,16 +1359,15 @@ xfs_unmountfs_writesb(xfs_mount_t *mp)
 	 * skip superblock write if fs is read-only, or
 	 * if we are doing a forced umount.
 	 */
-	sbp = xfs_getsb(mp, 0);
 	if (!(XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY ||
 		XFS_FORCED_SHUTDOWN(mp))) {
 
-		xfs_icsb_sync_counters(mp);
+		sbp = xfs_getsb(mp, 0);
+ 		sb = XFS_BUF_TO_SBP(sbp);
 
 		/*
 		 * mark shared-readonly if desired
 		 */
-		sb = XFS_BUF_TO_SBP(sbp);
 		if (mp->m_mk_sharedro) {
 			if (!(sb->sb_flags & XFS_SBF_READONLY))
 				sb->sb_flags |= XFS_SBF_READONLY;
@@ -1178,6 +1376,7 @@ xfs_unmountfs_writesb(xfs_mount_t *mp)
 			xfs_fs_cmn_err(CE_NOTE, mp,
 				"Unmounting, marking shared read-only");
 		}
+
 		XFS_BUF_UNDONE(sbp);
 		XFS_BUF_UNREAD(sbp);
 		XFS_BUF_UNDELAYWRITE(sbp);
@@ -1192,8 +1391,8 @@ xfs_unmountfs_writesb(xfs_mount_t *mp)
 					  mp, sbp, XFS_BUF_ADDR(sbp));
 		if (error && mp->m_mk_sharedro)
 			xfs_fs_cmn_err(CE_ALERT, mp, "Superblock write error detected while unmounting.  Filesystem may not be marked shared readonly");
+		xfs_buf_relse(sbp);
 	}
-	xfs_buf_relse(sbp);
 	return error;
 }
 
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 82304b9..76ad747 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -66,6 +66,7 @@ struct xfs_bmbt_irec;
 struct xfs_bmap_free;
 struct xfs_extdelta;
 struct xfs_swapext;
+struct xfs_mru_cache;
 
 extern struct bhv_vfsops xfs_vfsops;
 extern struct bhv_vnodeops xfs_vnodeops;
@@ -424,17 +425,18 @@ typedef struct xfs_mount {
 	struct notifier_block	m_icsb_notifier; /* hotplug cpu notifier */
 	struct mutex		m_icsb_mutex;	/* balancer sync lock */
 #endif
+	struct xfs_mru_cache	*m_filestream;  /* per-mount filestream data */
 } xfs_mount_t;
 
 /*
  * Flags for m_flags.
  */
-#define	XFS_MOUNT_WSYNC		(1ULL << 0)	/* for nfs - all metadata ops
+#define XFS_MOUNT_WSYNC		(1ULL << 0)	/* for nfs - all metadata ops
 						   must be synchronous except
 						   for space allocations */
-#define	XFS_MOUNT_INO64		(1ULL << 1)
+#define XFS_MOUNT_INO64		(1ULL << 1)
 			     /* (1ULL << 2)	-- currently unused */
-			     /* (1ULL << 3)	-- currently unused */
+#define XFS_MOUNT_WAS_CLEAN	(1ULL << 3)
 #define XFS_MOUNT_FS_SHUTDOWN	(1ULL << 4)	/* atomic stop of all filesystem
 						   operations, typically for
 						   disk errors in metadata */
@@ -463,6 +465,8 @@ typedef struct xfs_mount {
 						 * I/O size in stat() */
 #define XFS_MOUNT_NO_PERCPU_SB	(1ULL << 23)	/* don't use per-cpu superblock
 						   counters */
+#define XFS_MOUNT_FILESTREAMS	(1ULL << 24)	/* enable the filestreams
+						   allocator */
 
 
 /*
@@ -511,6 +515,8 @@ xfs_preferred_iosize(xfs_mount_t *mp)
 
 #define XFS_MAXIOFFSET(mp)	((mp)->m_maxioffset)
 
+#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp)	\
+				((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
 #define XFS_FORCED_SHUTDOWN(mp)	((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
 #define xfs_force_shutdown(m,f)	\
 	bhv_vfs_force_shutdown((XFS_MTOVFS(m)), f, __FILE__, __LINE__)
@@ -602,6 +608,7 @@ typedef struct xfs_mod_sb {
 
 extern xfs_mount_t *xfs_mount_init(void);
 extern void	xfs_mod_sb(xfs_trans_t *, __int64_t);
+extern int	xfs_log_sbcount(xfs_mount_t *, uint);
 extern void	xfs_mount_free(xfs_mount_t *mp, int remove_bhv);
 extern int	xfs_mountfs(struct bhv_vfs *, xfs_mount_t *mp, int);
 extern void	xfs_mountfs_check_barriers(xfs_mount_t *mp);
@@ -618,12 +625,14 @@ extern int	xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
 extern int	xfs_readsb(xfs_mount_t *, int);
 extern void	xfs_freesb(xfs_mount_t *);
+extern int	xfs_fs_writable(xfs_mount_t *);
 extern void	xfs_do_force_shutdown(bhv_desc_t *, int, char *, int);
 extern int	xfs_syncsub(xfs_mount_t *, int, int *);
 extern int	xfs_sync_inodes(xfs_mount_t *, int, int *);
 extern xfs_agnumber_t	xfs_initialize_perag(struct bhv_vfs *, xfs_mount_t *,
 						xfs_agnumber_t);
 extern void	xfs_xlatesb(void *, struct xfs_sb *, int, __int64_t);
+extern int	xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
 
 extern struct xfs_dmops xfs_dmcore_stub;
 extern struct xfs_qmops xfs_qmcore_stub;
diff --git a/fs/xfs/xfs_mru_cache.c b/fs/xfs/xfs_mru_cache.c
new file mode 100644
index 0000000..7deb9e3
--- /dev/null
+++ b/fs/xfs/xfs_mru_cache.c
@@ -0,0 +1,608 @@
+/*
+ * Copyright (c) 2006-2007 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#include "xfs.h"
+#include "xfs_mru_cache.h"
+
+/*
+ * The MRU Cache data structure consists of a data store, an array of lists and
+ * a lock to protect its internal state.  At initialisation time, the client
+ * supplies an element lifetime in milliseconds and a group count, as well as a
+ * function pointer to call when deleting elements.  A data structure for
+ * queueing up work in the form of timed callbacks is also included.
+ *
+ * The group count controls how many lists are created, and thereby how finely
+ * the elements are grouped in time.  When reaping occurs, all the elements in
+ * all the lists whose time has expired are deleted.
+ *
+ * To give an example of how this works in practice, consider a client that
+ * initialises an MRU Cache with a lifetime of ten seconds and a group count of
+ * five.  Five internal lists will be created, each representing a two second
+ * period in time.  When the first element is added, time zero for the data
+ * structure is initialised to the current time.
+ *
+ * All the elements added in the first two seconds are appended to the first
+ * list.  Elements added in the third second go into the second list, and so on.
+ * If an element is accessed at any point, it is removed from its list and
+ * inserted at the head of the current most-recently-used list.
+ *
+ * The reaper function will have nothing to do until at least twelve seconds
+ * have elapsed since the first element was added.  The reason for this is that
+ * if it were called at t=11s, there could be elements in the first list that
+ * have only been inactive for nine seconds, so it still does nothing.  If it is
+ * called anywhere between t=12 and t=14 seconds, it will delete all the
+ * elements that remain in the first list.  It's therefore possible for elements
+ * to remain in the data store even after they've been inactive for up to
+ * (t + t/g) seconds, where t is the inactive element lifetime and g is the
+ * number of groups.
+ *
+ * The above example assumes that the reaper function gets called at least once
+ * every (t/g) seconds.  If it is called less frequently, unused elements will
+ * accumulate in the reap list until the reaper function is eventually called.
+ * The current implementation uses work queue callbacks to carefully time the
+ * reaper function calls, so this should happen rarely, if at all.
+ *
+ * From a design perspective, the primary reason for the choice of a list array
+ * representing discrete time intervals is that it's only practical to reap
+ * expired elements in groups of some appreciable size.  This automatically
+ * introduces a granularity to element lifetimes, so there's no point storing an
+ * individual timeout with each element that specifies a more precise reap time.
+ * The bonus is a saving of sizeof(long) bytes of memory per element stored.
+ *
+ * The elements could have been stored in just one list, but an array of
+ * counters or pointers would need to be maintained to allow them to be divided
+ * up into discrete time groups.  More critically, the process of touching or
+ * removing an element would involve walking large portions of the entire list,
+ * which would have a detrimental effect on performance.  The additional memory
+ * requirement for the array of list heads is minimal.
+ *
+ * When an element is touched or deleted, it needs to be removed from its
+ * current list.  Doubly linked lists are used to make the list maintenance
+ * portion of these operations O(1).  Since reaper timing can be imprecise,
+ * inserts and lookups can occur when there are no free lists available.  When
+ * this happens, all the elements on the LRU list need to be migrated to the end
+ * of the reap list.  To keep the list maintenance portion of these operations
+ * O(1) also, list tails need to be accessible without walking the entire list.
+ * This is the reason why doubly linked list heads are used.
+ */
+
+/*
+ * An MRU Cache is a dynamic data structure that stores its elements in a way
+ * that allows efficient lookups, but also groups them into discrete time
+ * intervals based on insertion time.  This allows elements to be efficiently
+ * and automatically reaped after a fixed period of inactivity.
+ *
+ * When a client data pointer is stored in the MRU Cache it needs to be added to
+ * both the data store and to one of the lists.  It must also be possible to
+ * access each of these entries via the other, i.e. to:
+ *
+ *    a) Walk a list, removing the corresponding data store entry for each item.
+ *    b) Look up a data store entry, then access its list entry directly.
+ *
+ * To achieve both of these goals, each entry must contain both a list entry and
+ * a key, in addition to the user's data pointer.  Note that it's not a good
+ * idea to have the client embed one of these structures at the top of their own
+ * data structure, because inserting the same item more than once would most
+ * likely result in a loop in one of the lists.  That's a sure-fire recipe for
+ * an infinite loop in the code.
+ */
+typedef struct xfs_mru_cache_elem
+{
+	struct list_head list_node;
+	unsigned long	key;
+	void		*value;
+} xfs_mru_cache_elem_t;
+
+static kmem_zone_t		*xfs_mru_elem_zone;
+static struct workqueue_struct	*xfs_mru_reap_wq;
+
+/*
+ * When inserting, destroying or reaping, it's first necessary to update the
+ * lists relative to a particular time.  In the case of destroying, that time
+ * will be well in the future to ensure that all items are moved to the reap
+ * list.  In all other cases though, the time will be the current time.
+ *
+ * This function enters a loop, moving the contents of the LRU list to the reap
+ * list again and again until either a) the lists are all empty, or b) time zero
+ * has been advanced sufficiently to be within the immediate element lifetime.
+ *
+ * Case a) above is detected by counting how many groups are migrated and
+ * stopping when they've all been moved.  Case b) is detected by monitoring the
+ * time_zero field, which is updated as each group is migrated.
+ *
+ * The return value is the earliest time that more migration could be needed, or
+ * zero if there's no need to schedule more work because the lists are empty.
+ */
+STATIC unsigned long
+_xfs_mru_cache_migrate(
+	xfs_mru_cache_t	*mru,
+	unsigned long	now)
+{
+	unsigned int	grp;
+	unsigned int	migrated = 0;
+	struct list_head *lru_list;
+
+	/* Nothing to do if the data store is empty. */
+	if (!mru->time_zero)
+		return 0;
+
+	/* While time zero is older than the time spanned by all the lists. */
+	while (mru->time_zero <= now - mru->grp_count * mru->grp_time) {
+
+		/*
+		 * If the LRU list isn't empty, migrate its elements to the tail
+		 * of the reap list.
+		 */
+		lru_list = mru->lists + mru->lru_grp;
+		if (!list_empty(lru_list))
+			list_splice_init(lru_list, mru->reap_list.prev);
+
+		/*
+		 * Advance the LRU group number, freeing the old LRU list to
+		 * become the new MRU list; advance time zero accordingly.
+		 */
+		mru->lru_grp = (mru->lru_grp + 1) % mru->grp_count;
+		mru->time_zero += mru->grp_time;
+
+		/*
+		 * If reaping is so far behind that all the elements on all the
+		 * lists have been migrated to the reap list, it's now empty.
+		 */
+		if (++migrated == mru->grp_count) {
+			mru->lru_grp = 0;
+			mru->time_zero = 0;
+			return 0;
+		}
+	}
+
+	/* Find the first non-empty list from the LRU end. */
+	for (grp = 0; grp < mru->grp_count; grp++) {
+
+		/* Check the grp'th list from the LRU end. */
+		lru_list = mru->lists + ((mru->lru_grp + grp) % mru->grp_count);
+		if (!list_empty(lru_list))
+			return mru->time_zero +
+			       (mru->grp_count + grp) * mru->grp_time;
+	}
+
+	/* All the lists must be empty. */
+	mru->lru_grp = 0;
+	mru->time_zero = 0;
+	return 0;
+}
+
+/*
+ * When inserting or doing a lookup, an element needs to be inserted into the
+ * MRU list.  The lists must be migrated first to ensure that they're
+ * up-to-date, otherwise the new element could be given a shorter lifetime in
+ * the cache than it should.
+ */
+STATIC void
+_xfs_mru_cache_list_insert(
+	xfs_mru_cache_t		*mru,
+	xfs_mru_cache_elem_t	*elem)
+{
+	unsigned int	grp = 0;
+	unsigned long	now = jiffies;
+
+	/*
+	 * If the data store is empty, initialise time zero, leave grp set to
+	 * zero and start the work queue timer if necessary.  Otherwise, set grp
+	 * to the number of group times that have elapsed since time zero.
+	 */
+	if (!_xfs_mru_cache_migrate(mru, now)) {
+		mru->time_zero = now;
+		if (!mru->next_reap)
+			mru->next_reap = mru->grp_count * mru->grp_time;
+	} else {
+		grp = (now - mru->time_zero) / mru->grp_time;
+		grp = (mru->lru_grp + grp) % mru->grp_count;
+	}
+
+	/* Insert the element at the tail of the corresponding list. */
+	list_add_tail(&elem->list_node, mru->lists + grp);
+}
+
+/*
+ * When destroying or reaping, all the elements that were migrated to the reap
+ * list need to be deleted.  For each element this involves removing it from the
+ * data store, removing it from the reap list, calling the client's free
+ * function and deleting the element from the element zone.
+ */
+STATIC void
+_xfs_mru_cache_clear_reap_list(
+	xfs_mru_cache_t		*mru)
+{
+	xfs_mru_cache_elem_t	*elem, *next;
+	struct list_head	tmp;
+
+	INIT_LIST_HEAD(&tmp);
+	list_for_each_entry_safe(elem, next, &mru->reap_list, list_node) {
+
+		/* Remove the element from the data store. */
+		radix_tree_delete(&mru->store, elem->key);
+
+		/*
+		 * remove to temp list so it can be freed without
+		 * needing to hold the lock
+		 */
+		list_move(&elem->list_node, &tmp);
+	}
+	mutex_spinunlock(&mru->lock, 0);
+
+	list_for_each_entry_safe(elem, next, &tmp, list_node) {
+
+		/* Remove the element from the reap list. */
+		list_del_init(&elem->list_node);
+
+		/* Call the client's free function with the key and value pointer. */
+		mru->free_func(elem->key, elem->value);
+
+		/* Free the element structure. */
+		kmem_zone_free(xfs_mru_elem_zone, elem);
+	}
+
+	mutex_spinlock(&mru->lock);
+}
+
+/*
+ * We fire the reap timer every group expiry interval so
+ * we always have a reaper ready to run. This makes shutdown
+ * and flushing of the reaper easy to do. Hence we need to
+ * keep when the next reap must occur so we can determine
+ * at each interval whether there is anything we need to do.
+ */
+STATIC void
+_xfs_mru_cache_reap(
+	struct work_struct	*work)
+{
+	xfs_mru_cache_t		*mru = container_of(work, xfs_mru_cache_t, work.work);
+	unsigned long		now;
+
+	ASSERT(mru && mru->lists);
+	if (!mru || !mru->lists)
+		return;
+
+	mutex_spinlock(&mru->lock);
+	now = jiffies;
+	if (mru->reap_all ||
+	    (mru->next_reap && time_after(now, mru->next_reap))) {
+		if (mru->reap_all)
+			now += mru->grp_count * mru->grp_time * 2;
+		mru->next_reap = _xfs_mru_cache_migrate(mru, now);
+		_xfs_mru_cache_clear_reap_list(mru);
+	}
+
+	/*
+	 * the process that triggered the reap_all is responsible
+	 * for restating the periodic reap if it is required.
+	 */
+	if (!mru->reap_all)
+		queue_delayed_work(xfs_mru_reap_wq, &mru->work, mru->grp_time);
+	mru->reap_all = 0;
+	mutex_spinunlock(&mru->lock, 0);
+}
+
+int
+xfs_mru_cache_init(void)
+{
+	xfs_mru_elem_zone = kmem_zone_init(sizeof(xfs_mru_cache_elem_t),
+	                                 "xfs_mru_cache_elem");
+	if (!xfs_mru_elem_zone)
+		return ENOMEM;
+
+	xfs_mru_reap_wq = create_singlethread_workqueue("xfs_mru_cache");
+	if (!xfs_mru_reap_wq) {
+		kmem_zone_destroy(xfs_mru_elem_zone);
+		return ENOMEM;
+	}
+
+	return 0;
+}
+
+void
+xfs_mru_cache_uninit(void)
+{
+	destroy_workqueue(xfs_mru_reap_wq);
+	kmem_zone_destroy(xfs_mru_elem_zone);
+}
+
+/*
+ * To initialise a struct xfs_mru_cache pointer, call xfs_mru_cache_create()
+ * with the address of the pointer, a lifetime value in milliseconds, a group
+ * count and a free function to use when deleting elements.  This function
+ * returns 0 if the initialisation was successful.
+ */
+int
+xfs_mru_cache_create(
+	xfs_mru_cache_t		**mrup,
+	unsigned int		lifetime_ms,
+	unsigned int		grp_count,
+	xfs_mru_cache_free_func_t free_func)
+{
+	xfs_mru_cache_t	*mru = NULL;
+	int		err = 0, grp;
+	unsigned int	grp_time;
+
+	if (mrup)
+		*mrup = NULL;
+
+	if (!mrup || !grp_count || !lifetime_ms || !free_func)
+		return EINVAL;
+
+	if (!(grp_time = msecs_to_jiffies(lifetime_ms) / grp_count))
+		return EINVAL;
+
+	if (!(mru = kmem_zalloc(sizeof(*mru), KM_SLEEP)))
+		return ENOMEM;
+
+	/* An extra list is needed to avoid reaping up to a grp_time early. */
+	mru->grp_count = grp_count + 1;
+	mru->lists = kmem_alloc(mru->grp_count * sizeof(*mru->lists), KM_SLEEP);
+
+	if (!mru->lists) {
+		err = ENOMEM;
+		goto exit;
+	}
+
+	for (grp = 0; grp < mru->grp_count; grp++)
+		INIT_LIST_HEAD(mru->lists + grp);
+
+	/*
+	 * We use GFP_KERNEL radix tree preload and do inserts under a
+	 * spinlock so GFP_ATOMIC is appropriate for the radix tree itself.
+	 */
+	INIT_RADIX_TREE(&mru->store, GFP_ATOMIC);
+	INIT_LIST_HEAD(&mru->reap_list);
+	spinlock_init(&mru->lock, "xfs_mru_cache");
+	INIT_DELAYED_WORK(&mru->work, _xfs_mru_cache_reap);
+
+	mru->grp_time  = grp_time;
+	mru->free_func = free_func;
+
+	/* start up the reaper event */
+	mru->next_reap = 0;
+	mru->reap_all = 0;
+	queue_delayed_work(xfs_mru_reap_wq, &mru->work, mru->grp_time);
+
+	*mrup = mru;
+
+exit:
+	if (err && mru && mru->lists)
+		kmem_free(mru->lists, mru->grp_count * sizeof(*mru->lists));
+	if (err && mru)
+		kmem_free(mru, sizeof(*mru));
+
+	return err;
+}
+
+/*
+ * Call xfs_mru_cache_flush() to flush out all cached entries, calling their
+ * free functions as they're deleted.  When this function returns, the caller is
+ * guaranteed that all the free functions for all the elements have finished
+ * executing.
+ *
+ * While we are flushing, we stop the periodic reaper event from triggering.
+ * Normally, we want to restart this periodic event, but if we are shutting
+ * down the cache we do not want it restarted. hence the restart parameter
+ * where 0 = do not restart reaper and 1 = restart reaper.
+ */
+void
+xfs_mru_cache_flush(
+	xfs_mru_cache_t		*mru,
+	int			restart)
+{
+	if (!mru || !mru->lists)
+		return;
+
+	cancel_rearming_delayed_workqueue(xfs_mru_reap_wq, &mru->work);
+
+	mutex_spinlock(&mru->lock);
+	mru->reap_all = 1;
+	mutex_spinunlock(&mru->lock, 0);
+
+	queue_work(xfs_mru_reap_wq, &mru->work.work);
+	flush_workqueue(xfs_mru_reap_wq);
+
+	mutex_spinlock(&mru->lock);
+	WARN_ON_ONCE(mru->reap_all != 0);
+	mru->reap_all = 0;
+	if (restart)
+		queue_delayed_work(xfs_mru_reap_wq, &mru->work, mru->grp_time);
+	mutex_spinunlock(&mru->lock, 0);
+}
+
+void
+xfs_mru_cache_destroy(
+	xfs_mru_cache_t		*mru)
+{
+	if (!mru || !mru->lists)
+		return;
+
+	/* we don't want the reaper to restart here */
+	xfs_mru_cache_flush(mru, 0);
+
+	kmem_free(mru->lists, mru->grp_count * sizeof(*mru->lists));
+	kmem_free(mru, sizeof(*mru));
+}
+
+/*
+ * To insert an element, call xfs_mru_cache_insert() with the data store, the
+ * element's key and the client data pointer.  This function returns 0 on
+ * success or ENOMEM if memory for the data element couldn't be allocated.
+ */
+int
+xfs_mru_cache_insert(
+	xfs_mru_cache_t	*mru,
+	unsigned long	key,
+	void		*value)
+{
+	xfs_mru_cache_elem_t *elem;
+
+	ASSERT(mru && mru->lists);
+	if (!mru || !mru->lists)
+		return EINVAL;
+
+	elem = kmem_zone_zalloc(xfs_mru_elem_zone, KM_SLEEP);
+	if (!elem)
+		return ENOMEM;
+
+	if (radix_tree_preload(GFP_KERNEL)) {
+		kmem_zone_free(xfs_mru_elem_zone, elem);
+		return ENOMEM;
+	}
+
+	INIT_LIST_HEAD(&elem->list_node);
+	elem->key = key;
+	elem->value = value;
+
+	mutex_spinlock(&mru->lock);
+
+	radix_tree_insert(&mru->store, key, elem);
+	radix_tree_preload_end();
+	_xfs_mru_cache_list_insert(mru, elem);
+
+	mutex_spinunlock(&mru->lock, 0);
+
+	return 0;
+}
+
+/*
+ * To remove an element without calling the free function, call
+ * xfs_mru_cache_remove() with the data store and the element's key.  On success
+ * the client data pointer for the removed element is returned, otherwise this
+ * function will return a NULL pointer.
+ */
+void *
+xfs_mru_cache_remove(
+	xfs_mru_cache_t	*mru,
+	unsigned long	key)
+{
+	xfs_mru_cache_elem_t *elem;
+	void		*value = NULL;
+
+	ASSERT(mru && mru->lists);
+	if (!mru || !mru->lists)
+		return NULL;
+
+	mutex_spinlock(&mru->lock);
+	elem = radix_tree_delete(&mru->store, key);
+	if (elem) {
+		value = elem->value;
+		list_del(&elem->list_node);
+	}
+
+	mutex_spinunlock(&mru->lock, 0);
+
+	if (elem)
+		kmem_zone_free(xfs_mru_elem_zone, elem);
+
+	return value;
+}
+
+/*
+ * To remove and element and call the free function, call xfs_mru_cache_delete()
+ * with the data store and the element's key.
+ */
+void
+xfs_mru_cache_delete(
+	xfs_mru_cache_t	*mru,
+	unsigned long	key)
+{
+	void		*value = xfs_mru_cache_remove(mru, key);
+
+	if (value)
+		mru->free_func(key, value);
+}
+
+/*
+ * To look up an element using its key, call xfs_mru_cache_lookup() with the
+ * data store and the element's key.  If found, the element will be moved to the
+ * head of the MRU list to indicate that it's been touched.
+ *
+ * The internal data structures are protected by a spinlock that is STILL HELD
+ * when this function returns.  Call xfs_mru_cache_done() to release it.  Note
+ * that it is not safe to call any function that might sleep in the interim.
+ *
+ * The implementation could have used reference counting to avoid this
+ * restriction, but since most clients simply want to get, set or test a member
+ * of the returned data structure, the extra per-element memory isn't warranted.
+ *
+ * If the element isn't found, this function returns NULL and the spinlock is
+ * released.  xfs_mru_cache_done() should NOT be called when this occurs.
+ */
+void *
+xfs_mru_cache_lookup(
+	xfs_mru_cache_t	*mru,
+	unsigned long	key)
+{
+	xfs_mru_cache_elem_t *elem;
+
+	ASSERT(mru && mru->lists);
+	if (!mru || !mru->lists)
+		return NULL;
+
+	mutex_spinlock(&mru->lock);
+	elem = radix_tree_lookup(&mru->store, key);
+	if (elem) {
+		list_del(&elem->list_node);
+		_xfs_mru_cache_list_insert(mru, elem);
+	}
+	else
+		mutex_spinunlock(&mru->lock, 0);
+
+	return elem ? elem->value : NULL;
+}
+
+/*
+ * To look up an element using its key, but leave its location in the internal
+ * lists alone, call xfs_mru_cache_peek().  If the element isn't found, this
+ * function returns NULL.
+ *
+ * See the comments above the declaration of the xfs_mru_cache_lookup() function
+ * for important locking information pertaining to this call.
+ */
+void *
+xfs_mru_cache_peek(
+	xfs_mru_cache_t	*mru,
+	unsigned long	key)
+{
+	xfs_mru_cache_elem_t *elem;
+
+	ASSERT(mru && mru->lists);
+	if (!mru || !mru->lists)
+		return NULL;
+
+	mutex_spinlock(&mru->lock);
+	elem = radix_tree_lookup(&mru->store, key);
+	if (!elem)
+		mutex_spinunlock(&mru->lock, 0);
+
+	return elem ? elem->value : NULL;
+}
+
+/*
+ * To release the internal data structure spinlock after having performed an
+ * xfs_mru_cache_lookup() or an xfs_mru_cache_peek(), call xfs_mru_cache_done()
+ * with the data store pointer.
+ */
+void
+xfs_mru_cache_done(
+	xfs_mru_cache_t	*mru)
+{
+	mutex_spinunlock(&mru->lock, 0);
+}
diff --git a/fs/xfs/xfs_mru_cache.h b/fs/xfs/xfs_mru_cache.h
new file mode 100644
index 0000000..624fd10
--- /dev/null
+++ b/fs/xfs/xfs_mru_cache.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2006-2007 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#ifndef __XFS_MRU_CACHE_H__
+#define __XFS_MRU_CACHE_H__
+
+
+/* Function pointer type for callback to free a client's data pointer. */
+typedef void (*xfs_mru_cache_free_func_t)(unsigned long, void*);
+
+typedef struct xfs_mru_cache
+{
+	struct radix_tree_root	store;     /* Core storage data structure.  */
+	struct list_head	*lists;    /* Array of lists, one per grp.  */
+	struct list_head	reap_list; /* Elements overdue for reaping. */
+	spinlock_t		lock;      /* Lock to protect this struct.  */
+	unsigned int		grp_count; /* Number of discrete groups.    */
+	unsigned int		grp_time;  /* Time period spanned by grps.  */
+	unsigned int		lru_grp;   /* Group containing time zero.   */
+	unsigned long		time_zero; /* Time first element was added. */
+	unsigned long		next_reap; /* Time that the reaper should
+					      next do something. */
+	unsigned int		reap_all;  /* if set, reap all lists */
+	xfs_mru_cache_free_func_t free_func; /* Function pointer for freeing. */
+	struct delayed_work	work;      /* Workqueue data for reaping.   */
+} xfs_mru_cache_t;
+
+int xfs_mru_cache_init(void);
+void xfs_mru_cache_uninit(void);
+int xfs_mru_cache_create(struct xfs_mru_cache **mrup, unsigned int lifetime_ms,
+			     unsigned int grp_count,
+			     xfs_mru_cache_free_func_t free_func);
+void xfs_mru_cache_flush(xfs_mru_cache_t *mru, int restart);
+void xfs_mru_cache_destroy(struct xfs_mru_cache *mru);
+int xfs_mru_cache_insert(struct xfs_mru_cache *mru, unsigned long key,
+				void *value);
+void * xfs_mru_cache_remove(struct xfs_mru_cache *mru, unsigned long key);
+void xfs_mru_cache_delete(struct xfs_mru_cache *mru, unsigned long key);
+void *xfs_mru_cache_lookup(struct xfs_mru_cache *mru, unsigned long key);
+void *xfs_mru_cache_peek(struct xfs_mru_cache *mru, unsigned long key);
+void xfs_mru_cache_done(struct xfs_mru_cache *mru);
+
+#endif /* __XFS_MRU_CACHE_H__ */
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index b3a5f07..47082c0 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -1882,11 +1882,13 @@ xfs_growfs_rt(
 	    (nrblocks = in->newblocks) <= sbp->sb_rblocks ||
 	    (sbp->sb_rblocks && (in->extsize != sbp->sb_rextsize)))
 		return XFS_ERROR(EINVAL);
+	if ((error = xfs_sb_validate_fsb_count(sbp, nrblocks)))
+		return error;
 	/*
 	 * Read in the last block of the device, make sure it exists.
 	 */
 	error = xfs_read_buf(mp, mp->m_rtdev_targp,
-			XFS_FSB_TO_BB(mp, in->newblocks - 1),
+			XFS_FSB_TO_BB(mp, nrblocks - 1),
 			XFS_FSB_TO_BB(mp, 1), 0, &bp);
 	if (error)
 		return error;
diff --git a/fs/xfs/xfs_rw.h b/fs/xfs/xfs_rw.h
index 188b296..fcf28db 100644
--- a/fs/xfs/xfs_rw.h
+++ b/fs/xfs/xfs_rw.h
@@ -72,6 +72,34 @@ xfs_fsb_to_db_io(struct xfs_iocore *io, xfs_fsblock_t fsb)
 }
 
 /*
+ * Flags for xfs_free_eofblocks
+ */
+#define XFS_FREE_EOF_LOCK	(1<<0)
+#define XFS_FREE_EOF_NOLOCK	(1<<1)
+
+
+/*
+ * helper function to extract extent size hint from inode
+ */
+STATIC_INLINE xfs_extlen_t
+xfs_get_extsz_hint(
+	xfs_inode_t	*ip)
+{
+	xfs_extlen_t	extsz;
+
+	if (unlikely(ip->i_d.di_flags & XFS_DIFLAG_REALTIME)) {
+		extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)
+				? ip->i_d.di_extsize
+				: ip->i_mount->m_sb.sb_rextsize;
+		ASSERT(extsz);
+	} else {
+		extsz = (ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)
+				? ip->i_d.di_extsize : 0;
+	}
+	return extsz;
+}
+
+/*
  * Prototypes for functions in xfs_rw.c.
  */
 extern int xfs_write_clear_setuid(struct xfs_inode *ip);
@@ -91,10 +119,12 @@ extern void xfs_ioerror_alert(char *func, struct xfs_mount *mp,
 extern int xfs_rwlock(bhv_desc_t *bdp, bhv_vrwlock_t write_lock);
 extern void xfs_rwunlock(bhv_desc_t *bdp, bhv_vrwlock_t write_lock);
 extern int xfs_setattr(bhv_desc_t *, bhv_vattr_t *vap, int flags,
-		       cred_t *credp);
+			cred_t *credp);
 extern int xfs_change_file_space(bhv_desc_t *bdp, int cmd, xfs_flock64_t *bf,
-				 xfs_off_t offset, cred_t *credp, int flags);
+			xfs_off_t offset, cred_t *credp, int flags);
 extern int xfs_set_dmattrs(bhv_desc_t *bdp, u_int evmask, u_int16_t state,
-			   cred_t *credp);
+			cred_t *credp);
+extern int xfs_free_eofblocks(struct xfs_mount *mp, struct xfs_inode *ip,
+			int flags);
 
 #endif /* __XFS_RW_H__ */
diff --git a/fs/xfs/xfs_sb.h b/fs/xfs/xfs_sb.h
index 467854b..ef42537 100644
--- a/fs/xfs/xfs_sb.h
+++ b/fs/xfs/xfs_sb.h
@@ -74,12 +74,13 @@ struct xfs_mount;
  */
 #define XFS_SB_VERSION2_REALFBITS	0x00ffffff	/* Mask: features */
 #define XFS_SB_VERSION2_RESERVED1BIT	0x00000001
-#define XFS_SB_VERSION2_RESERVED2BIT	0x00000002
+#define XFS_SB_VERSION2_LAZYSBCOUNTBIT	0x00000002	/* Superblk counters */
 #define XFS_SB_VERSION2_RESERVED4BIT	0x00000004
 #define XFS_SB_VERSION2_ATTR2BIT	0x00000008	/* Inline attr rework */
 
 #define	XFS_SB_VERSION2_OKREALFBITS	\
-	(XFS_SB_VERSION2_ATTR2BIT)
+	(XFS_SB_VERSION2_LAZYSBCOUNTBIT	| \
+	 XFS_SB_VERSION2_ATTR2BIT)
 #define	XFS_SB_VERSION2_OKSASHFBITS	\
 	(0)
 #define XFS_SB_VERSION2_OKREALBITS	\
@@ -181,6 +182,9 @@ typedef enum {
 #define XFS_SB_SHARED_VN	XFS_SB_MVAL(SHARED_VN)
 #define XFS_SB_UNIT		XFS_SB_MVAL(UNIT)
 #define XFS_SB_WIDTH		XFS_SB_MVAL(WIDTH)
+#define XFS_SB_ICOUNT		XFS_SB_MVAL(ICOUNT)
+#define XFS_SB_IFREE		XFS_SB_MVAL(IFREE)
+#define XFS_SB_FDBLOCKS		XFS_SB_MVAL(FDBLOCKS)
 #define XFS_SB_FEATURES2	XFS_SB_MVAL(FEATURES2)
 #define	XFS_SB_NUM_BITS		((int)XFS_SBS_FIELDCOUNT)
 #define	XFS_SB_ALL_BITS		((1LL << XFS_SB_NUM_BITS) - 1)
@@ -188,7 +192,7 @@ typedef enum {
 	(XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
 	 XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
 	 XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
-	 XFS_SB_FEATURES2)
+	 XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2)
 
 
 /*
@@ -414,6 +418,12 @@ static inline int xfs_sb_version_hasmorebits(xfs_sb_t *sbp)
  *	 ((sbp)->sb_features2 & XFS_SB_VERSION2_FUNBIT)
  */
 
+static inline int xfs_sb_version_haslazysbcount(xfs_sb_t *sbp)
+{
+	return (XFS_SB_VERSION_HASMOREBITS(sbp) &&	\
+		((sbp)->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
+}
+
 #define XFS_SB_VERSION_HASATTR2(sbp)	xfs_sb_version_hasattr2(sbp)
 static inline int xfs_sb_version_hasattr2(xfs_sb_t *sbp)
 {
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index cc2d609..356d662 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -427,6 +427,14 @@ undo_blocks:
  *
  * Mark the transaction structure to indicate that the superblock
  * needs to be updated before committing.
+ *
+ * Because we may not be keeping track of allocated/free inodes and
+ * used filesystem blocks in the superblock, we do not mark the
+ * superblock dirty in this transaction if we modify these fields.
+ * We still need to update the transaction deltas so that they get
+ * applied to the incore superblock, but we don't want them to
+ * cause the superblock to get locked and logged if these are the
+ * only fields in the superblock that the transaction modifies.
  */
 void
 xfs_trans_mod_sb(
@@ -434,13 +442,19 @@ xfs_trans_mod_sb(
 	uint		field,
 	int64_t		delta)
 {
+	uint32_t	flags = (XFS_TRANS_DIRTY|XFS_TRANS_SB_DIRTY);
+	xfs_mount_t	*mp = tp->t_mountp;
 
 	switch (field) {
 	case XFS_TRANS_SB_ICOUNT:
 		tp->t_icount_delta += delta;
+		if (xfs_sb_version_haslazysbcount(&mp->m_sb))
+			flags &= ~XFS_TRANS_SB_DIRTY;
 		break;
 	case XFS_TRANS_SB_IFREE:
 		tp->t_ifree_delta += delta;
+		if (xfs_sb_version_haslazysbcount(&mp->m_sb))
+			flags &= ~XFS_TRANS_SB_DIRTY;
 		break;
 	case XFS_TRANS_SB_FDBLOCKS:
 		/*
@@ -453,6 +467,8 @@ xfs_trans_mod_sb(
 			ASSERT(tp->t_blk_res_used <= tp->t_blk_res);
 		}
 		tp->t_fdblocks_delta += delta;
+		if (xfs_sb_version_haslazysbcount(&mp->m_sb))
+			flags &= ~XFS_TRANS_SB_DIRTY;
 		break;
 	case XFS_TRANS_SB_RES_FDBLOCKS:
 		/*
@@ -462,6 +478,8 @@ xfs_trans_mod_sb(
 		 */
 		ASSERT(delta < 0);
 		tp->t_res_fdblocks_delta += delta;
+		if (xfs_sb_version_haslazysbcount(&mp->m_sb))
+			flags &= ~XFS_TRANS_SB_DIRTY;
 		break;
 	case XFS_TRANS_SB_FREXTENTS:
 		/*
@@ -515,7 +533,7 @@ xfs_trans_mod_sb(
 		return;
 	}
 
-	tp->t_flags |= (XFS_TRANS_SB_DIRTY | XFS_TRANS_DIRTY);
+	tp->t_flags |= flags;
 }
 
 /*
@@ -544,18 +562,23 @@ xfs_trans_apply_sb_deltas(
 	       (tp->t_ag_freeblks_delta + tp->t_ag_flist_delta +
 		tp->t_ag_btree_delta));
 
-	if (tp->t_icount_delta != 0) {
-		INT_MOD(sbp->sb_icount, ARCH_CONVERT, tp->t_icount_delta);
-	}
-	if (tp->t_ifree_delta != 0) {
-		INT_MOD(sbp->sb_ifree, ARCH_CONVERT, tp->t_ifree_delta);
-	}
+	/*
+	 * Only update the superblock counters if we are logging them
+	 */
+	if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) {
+		if (tp->t_icount_delta != 0) {
+			INT_MOD(sbp->sb_icount, ARCH_CONVERT, tp->t_icount_delta);
+		}
+		if (tp->t_ifree_delta != 0) {
+			INT_MOD(sbp->sb_ifree, ARCH_CONVERT, tp->t_ifree_delta);
+		}
 
-	if (tp->t_fdblocks_delta != 0) {
-		INT_MOD(sbp->sb_fdblocks, ARCH_CONVERT, tp->t_fdblocks_delta);
-	}
-	if (tp->t_res_fdblocks_delta != 0) {
-		INT_MOD(sbp->sb_fdblocks, ARCH_CONVERT, tp->t_res_fdblocks_delta);
+		if (tp->t_fdblocks_delta != 0) {
+			INT_MOD(sbp->sb_fdblocks, ARCH_CONVERT, tp->t_fdblocks_delta);
+		}
+		if (tp->t_res_fdblocks_delta != 0) {
+			INT_MOD(sbp->sb_fdblocks, ARCH_CONVERT, tp->t_res_fdblocks_delta);
+		}
 	}
 
 	if (tp->t_frextents_delta != 0) {
@@ -615,11 +638,23 @@ xfs_trans_apply_sb_deltas(
 }
 
 /*
- * xfs_trans_unreserve_and_mod_sb() is called to release unused
- * reservations and apply superblock counter changes to the in-core
- * superblock.
+ * xfs_trans_unreserve_and_mod_sb() is called to release unused reservations
+ * and apply superblock counter changes to the in-core superblock.  The
+ * t_res_fdblocks_delta and t_res_frextents_delta fields are explicitly NOT
+ * applied to the in-core superblock.  The idea is that that has already been
+ * done.
  *
  * This is done efficiently with a single call to xfs_mod_incore_sb_batch().
+ * However, we have to ensure that we only modify each superblock field only
+ * once because the application of the delta values may not be atomic. That can
+ * lead to ENOSPC races occurring if we have two separate modifcations of the
+ * free space counter to put back the entire reservation and then take away
+ * what we used.
+ *
+ * If we are not logging superblock counters, then the inode allocated/free and
+ * used block counts are not updated in the on disk superblock. In this case,
+ * XFS_TRANS_SB_DIRTY will not be set when the transaction is updated but we
+ * still need to update the incore superblock with the changes.
  */
 STATIC void
 xfs_trans_unreserve_and_mod_sb(
@@ -627,40 +662,49 @@ xfs_trans_unreserve_and_mod_sb(
 {
 	xfs_mod_sb_t	msb[14];	/* If you add cases, add entries */
 	xfs_mod_sb_t	*msbp;
+	xfs_mount_t	*mp = tp->t_mountp;
 	/* REFERENCED */
 	int		error;
 	int		rsvd;
+	int64_t		blkdelta = 0;
+	int64_t		rtxdelta = 0;
 
 	msbp = msb;
 	rsvd = (tp->t_flags & XFS_TRANS_RESERVE) != 0;
 
-	/*
-	 * Release any reserved blocks.  Any that were allocated
-	 * will be taken back again by fdblocks_delta below.
-	 */
-	if (tp->t_blk_res > 0) {
+	/* calculate free blocks delta */
+	if (tp->t_blk_res > 0)
+		blkdelta = tp->t_blk_res;
+
+	if ((tp->t_fdblocks_delta != 0) &&
+	    (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
+	     (tp->t_flags & XFS_TRANS_SB_DIRTY)))
+	        blkdelta += tp->t_fdblocks_delta;
+
+	if (blkdelta != 0) {
 		msbp->msb_field = XFS_SBS_FDBLOCKS;
-		msbp->msb_delta = tp->t_blk_res;
+		msbp->msb_delta = blkdelta;
 		msbp++;
 	}
 
-	/*
-	 * Release any reserved real time extents .  Any that were
-	 * allocated will be taken back again by frextents_delta below.
-	 */
-	if (tp->t_rtx_res > 0) {
+	/* calculate free realtime extents delta */
+	if (tp->t_rtx_res > 0)
+		rtxdelta = tp->t_rtx_res;
+
+	if ((tp->t_frextents_delta != 0) &&
+	    (tp->t_flags & XFS_TRANS_SB_DIRTY))
+		rtxdelta += tp->t_frextents_delta;
+
+	if (rtxdelta != 0) {
 		msbp->msb_field = XFS_SBS_FREXTENTS;
-		msbp->msb_delta = tp->t_rtx_res;
+		msbp->msb_delta = rtxdelta;
 		msbp++;
 	}
 
-	/*
-	 * Apply any superblock modifications to the in-core version.
-	 * The t_res_fdblocks_delta and t_res_frextents_delta fields are
-	 * explicitly NOT applied to the in-core superblock.
-	 * The idea is that that has already been done.
-	 */
-	if (tp->t_flags & XFS_TRANS_SB_DIRTY) {
+	/* apply remaining deltas */
+
+	if (xfs_sb_version_haslazysbcount(&mp->m_sb) ||
+	     (tp->t_flags & XFS_TRANS_SB_DIRTY)) {
 		if (tp->t_icount_delta != 0) {
 			msbp->msb_field = XFS_SBS_ICOUNT;
 			msbp->msb_delta = tp->t_icount_delta;
@@ -671,16 +715,9 @@ xfs_trans_unreserve_and_mod_sb(
 			msbp->msb_delta = tp->t_ifree_delta;
 			msbp++;
 		}
-		if (tp->t_fdblocks_delta != 0) {
-			msbp->msb_field = XFS_SBS_FDBLOCKS;
-			msbp->msb_delta = tp->t_fdblocks_delta;
-			msbp++;
-		}
-		if (tp->t_frextents_delta != 0) {
-			msbp->msb_field = XFS_SBS_FREXTENTS;
-			msbp->msb_delta = tp->t_frextents_delta;
-			msbp++;
-		}
+	}
+
+	if (tp->t_flags & XFS_TRANS_SB_DIRTY) {
 		if (tp->t_dblocks_delta != 0) {
 			msbp->msb_field = XFS_SBS_DBLOCKS;
 			msbp->msb_delta = tp->t_dblocks_delta;
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index 7dfcc45..0e26e72 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -94,7 +94,8 @@ typedef struct xfs_trans_header {
 #define	XFS_TRANS_GROWFSRT_ZERO		38
 #define	XFS_TRANS_GROWFSRT_FREE		39
 #define	XFS_TRANS_SWAPEXT		40
-#define	XFS_TRANS_TYPE_MAX		40
+#define	XFS_TRANS_SB_COUNT		41
+#define	XFS_TRANS_TYPE_MAX		41
 /* new transaction types need to be reflected in xfs_logprint(8) */
 
 
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index 65c5612..11f5ea2 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -51,6 +51,8 @@
 #include "xfs_acl.h"
 #include "xfs_attr.h"
 #include "xfs_clnt.h"
+#include "xfs_mru_cache.h"
+#include "xfs_filestream.h"
 #include "xfs_fsops.h"
 
 STATIC int	xfs_sync(bhv_desc_t *, int, cred_t *);
@@ -81,6 +83,8 @@ xfs_init(void)
 	xfs_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf");
 	xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork");
 	xfs_acl_zone_init(xfs_acl_zone, "xfs_acl");
+	xfs_mru_cache_init();
+	xfs_filestream_init();
 
 	/*
 	 * The size of the zone allocated buf log item is the maximum
@@ -164,6 +168,8 @@ xfs_cleanup(void)
 	xfs_cleanup_procfs();
 	xfs_sysctl_unregister();
 	xfs_refcache_destroy();
+	xfs_filestream_uninit();
+	xfs_mru_cache_uninit();
 	xfs_acl_zone_destroy(xfs_acl_zone);
 
 #ifdef XFS_DIR2_TRACE
@@ -320,6 +326,9 @@ xfs_start_flags(
 	else
 		mp->m_flags &= ~XFS_MOUNT_BARRIER;
 
+	if (ap->flags2 & XFSMNT2_FILESTREAMS)
+		mp->m_flags |= XFS_MOUNT_FILESTREAMS;
+
 	return 0;
 }
 
@@ -518,6 +527,9 @@ xfs_mount(
 	if (mp->m_flags & XFS_MOUNT_BARRIER)
 		xfs_mountfs_check_barriers(mp);
 
+	if ((error = xfs_filestream_mount(mp)))
+		goto error2;
+
 	error = XFS_IOINIT(vfsp, args, flags);
 	if (error)
 		goto error2;
@@ -575,6 +587,13 @@ xfs_unmount(
 	 */
 	xfs_refcache_purge_mp(mp);
 
+	/*
+	 * Blow away any referenced inode in the filestreams cache.
+	 * This can and will cause log traffic as inodes go inactive
+	 * here.
+	 */
+	xfs_filestream_unmount(mp);
+
 	XFS_bflush(mp->m_ddev_targp);
 	error = xfs_unmount_flush(mp, 0);
 	if (error)
@@ -640,7 +659,7 @@ xfs_quiesce_fs(
 	 * we can write the unmount record.
 	 */
 	do {
-		xfs_syncsub(mp, SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT, NULL);
+		xfs_syncsub(mp, SYNC_INODE_QUIESCE, NULL);
 		pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
 		if (!pincount) {
 			delay(50);
@@ -651,6 +670,30 @@ xfs_quiesce_fs(
 	return 0;
 }
 
+/*
+ * Second stage of a quiesce. The data is already synced, now we have to take
+ * care of the metadata. New transactions are already blocked, so we need to
+ * wait for any remaining transactions to drain out before proceding.
+ */
+STATIC void
+xfs_attr_quiesce(
+	xfs_mount_t	*mp)
+{
+	/* wait for all modifications to complete */
+	while (atomic_read(&mp->m_active_trans) > 0)
+		delay(100);
+
+	/* flush inodes and push all remaining buffers out to disk */
+	xfs_quiesce_fs(mp);
+
+	ASSERT_ALWAYS(atomic_read(&mp->m_active_trans) == 0);
+
+	/* Push the superblock and write an unmount record */
+	xfs_log_sbcount(mp, 1);
+	xfs_log_unmount_write(mp);
+	xfs_unmountfs_writesb(mp);
+}
+
 STATIC int
 xfs_mntupdate(
 	bhv_desc_t			*bdp,
@@ -670,10 +713,9 @@ xfs_mntupdate(
 			mp->m_flags &= ~XFS_MOUNT_BARRIER;
 		}
 	} else if (!(vfsp->vfs_flag & VFS_RDONLY)) {	/* rw -> ro */
-		bhv_vfs_sync(vfsp, SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR, NULL);
-		xfs_quiesce_fs(mp);
-		xfs_log_unmount_write(mp);
-		xfs_unmountfs_writesb(mp);
+		xfs_filestream_flush(mp);
+		bhv_vfs_sync(vfsp, SYNC_DATA_QUIESCE, NULL);
+		xfs_attr_quiesce(mp);
 		vfsp->vfs_flag |= VFS_RDONLY;
 	}
 	return 0;
@@ -887,6 +929,9 @@ xfs_sync(
 {
 	xfs_mount_t	*mp = XFS_BHVTOM(bdp);
 
+	if (flags & SYNC_IOWAIT)
+		xfs_filestream_flush(mp);
+
 	return xfs_syncsub(mp, flags, NULL);
 }
 
@@ -1128,58 +1173,41 @@ xfs_sync_inodes(
 		 * in the inode list.
 		 */
 
-		if ((flags & SYNC_CLOSE)  && (vp != NULL)) {
-			/*
-			 * This is the shutdown case.  We just need to
-			 * flush and invalidate all the pages associated
-			 * with the inode.  Drop the inode lock since
-			 * we can't hold it across calls to the buffer
-			 * cache.
-			 *
-			 * We don't set the VREMAPPING bit in the vnode
-			 * here, because we don't hold the vnode lock
-			 * exclusively.  It doesn't really matter, though,
-			 * because we only come here when we're shutting
-			 * down anyway.
-			 */
-			xfs_iunlock(ip, XFS_ILOCK_SHARED);
-
-			if (XFS_FORCED_SHUTDOWN(mp)) {
-				bhv_vop_toss_pages(vp, 0, -1, FI_REMAPF);
-			} else {
-				error = bhv_vop_flushinval_pages(vp, 0, -1, FI_REMAPF);
+		/*
+		 * If we have to flush data or wait for I/O completion
+		 * we need to drop the ilock that we currently hold.
+		 * If we need to drop the lock, insert a marker if we
+		 * have not already done so.
+		 */
+		if ((flags & (SYNC_CLOSE|SYNC_IOWAIT)) ||
+		    ((flags & SYNC_DELWRI) && VN_DIRTY(vp))) {
+			if (mount_locked) {
+				IPOINTER_INSERT(ip, mp);
 			}
+			xfs_iunlock(ip, XFS_ILOCK_SHARED);
 
-			xfs_ilock(ip, XFS_ILOCK_SHARED);
-
-		} else if ((flags & SYNC_DELWRI) && (vp != NULL)) {
-			if (VN_DIRTY(vp)) {
-				/* We need to have dropped the lock here,
-				 * so insert a marker if we have not already
-				 * done so.
-				 */
-				if (mount_locked) {
-					IPOINTER_INSERT(ip, mp);
-				}
-
-				/*
-				 * Drop the inode lock since we can't hold it
-				 * across calls to the buffer cache.
-				 */
-				xfs_iunlock(ip, XFS_ILOCK_SHARED);
+			if (flags & SYNC_CLOSE) {
+				/* Shutdown case. Flush and invalidate. */
+				if (XFS_FORCED_SHUTDOWN(mp))
+					bhv_vop_toss_pages(vp, 0, -1, FI_REMAPF);
+				else
+					error = bhv_vop_flushinval_pages(vp, 0,
+								-1, FI_REMAPF);
+			} else if ((flags & SYNC_DELWRI) && VN_DIRTY(vp)) {
 				error = bhv_vop_flush_pages(vp, (xfs_off_t)0,
 							-1, fflag, FI_NONE);
-				xfs_ilock(ip, XFS_ILOCK_SHARED);
 			}
 
+			/*
+			 * When freezing, we need to wait ensure all I/O (including direct
+			 * I/O) is complete to ensure no further data modification can take
+			 * place after this point
+			 */
+			if (flags & SYNC_IOWAIT)
+				vn_iowait(vp);
+
+			xfs_ilock(ip, XFS_ILOCK_SHARED);
 		}
-		/*
-		 * When freezing, we need to wait ensure all I/O (including direct
-		 * I/O) is complete to ensure no further data modification can take
-		 * place after this point
-		 */
-		if (flags & SYNC_IOWAIT)
-			vn_iowait(vp);
 
 		if (flags & SYNC_BDFLUSH) {
 			if ((flags & SYNC_ATTR) &&
@@ -1514,6 +1542,15 @@ xfs_syncsub(
 	}
 
 	/*
+	 * If asked, update the disk superblock with incore counter values if we
+	 * are using non-persistent counters so that they don't get too far out
+	 * of sync if we crash or get a forced shutdown. We don't want to force
+	 * this to disk, just get a transaction into the iclogs....
+	 */
+	if (flags & SYNC_SUPER)
+		xfs_log_sbcount(mp, 0);
+
+	/*
 	 * Now check to see if the log needs a "dummy" transaction.
 	 */
 
@@ -1645,6 +1682,7 @@ xfs_vget(
 					 * in stat(). */
 #define MNTOPT_ATTR2	"attr2"		/* do use attr2 attribute format */
 #define MNTOPT_NOATTR2	"noattr2"	/* do not use attr2 attribute format */
+#define MNTOPT_FILESTREAM  "filestreams" /* use filestreams allocator */
 
 STATIC unsigned long
 suffix_strtoul(char *s, char **endp, unsigned int base)
@@ -1831,6 +1869,8 @@ xfs_parseargs(
 			args->flags |= XFSMNT_ATTR2;
 		} else if (!strcmp(this_char, MNTOPT_NOATTR2)) {
 			args->flags &= ~XFSMNT_ATTR2;
+		} else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
+			args->flags2 |= XFSMNT2_FILESTREAMS;
 		} else if (!strcmp(this_char, "osyncisdsync")) {
 			/* no-op, this is now the default */
 			cmn_err(CE_WARN,
@@ -1959,9 +1999,9 @@ xfs_showargs(
 }
 
 /*
- * Second stage of a freeze. The data is already frozen, now we have to take
- * care of the metadata. New transactions are already blocked, so we need to
- * wait for any remaining transactions to drain out before proceding.
+ * Second stage of a freeze. The data is already frozen so we only
+ * need to take care of themetadata. Once that's done write a dummy
+ * record to dirty the log in case of a crash while frozen.
  */
 STATIC void
 xfs_freeze(
@@ -1969,18 +2009,7 @@ xfs_freeze(
 {
 	xfs_mount_t	*mp = XFS_BHVTOM(bdp);
 
-	/* wait for all modifications to complete */
-	while (atomic_read(&mp->m_active_trans) > 0)
-		delay(100);
-
-	/* flush inodes and push all remaining buffers out to disk */
-	xfs_quiesce_fs(mp);
-
-	ASSERT_ALWAYS(atomic_read(&mp->m_active_trans) == 0);
-
-	/* Push the superblock and write an unmount record */
-	xfs_log_unmount_write(mp);
-	xfs_unmountfs_writesb(mp);
+	xfs_attr_quiesce(mp);
 	xfs_fs_log_dummy(mp);
 }
 
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index de17aed..79b5227 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -51,6 +51,7 @@
 #include "xfs_refcache.h"
 #include "xfs_trans_space.h"
 #include "xfs_log_priv.h"
+#include "xfs_filestream.h"
 
 STATIC int
 xfs_open(
@@ -77,36 +78,6 @@ xfs_open(
 	return 0;
 }
 
-STATIC int
-xfs_close(
-	bhv_desc_t	*bdp,
-	int		flags,
-	lastclose_t	lastclose,
-	cred_t		*credp)
-{
-	bhv_vnode_t	*vp = BHV_TO_VNODE(bdp);
-	xfs_inode_t	*ip = XFS_BHVTOI(bdp);
-
-	if (XFS_FORCED_SHUTDOWN(ip->i_mount))
-		return XFS_ERROR(EIO);
-
-	if (lastclose != L_TRUE || !VN_ISREG(vp))
-		return 0;
-
-	/*
-	 * If we previously truncated this file and removed old data in
-	 * the process, we want to initiate "early" writeout on the last
-	 * close.  This is an attempt to combat the notorious NULL files
-	 * problem which is particularly noticable from a truncate down,
-	 * buffered (re-)write (delalloc), followed by a crash.  What we
-	 * are effectively doing here is significantly reducing the time
-	 * window where we'd otherwise be exposed to that problem.
-	 */
-	if (VUNTRUNCATE(vp) && VN_DIRTY(vp) && ip->i_delayed_blks > 0)
-		return bhv_vop_flush_pages(vp, 0, -1, XFS_B_ASYNC, FI_NONE);
-	return 0;
-}
-
 /*
  * xfs_getattr
  */
@@ -183,9 +154,8 @@ xfs_getattr(
 			 * realtime extent size or the realtime volume's
 			 * extent size.
 			 */
-			vap->va_blocksize = ip->i_d.di_extsize ?
-				(ip->i_d.di_extsize << mp->m_sb.sb_blocklog) :
-				(mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog);
+			vap->va_blocksize =
+				xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
 		}
 		break;
 	}
@@ -814,6 +784,8 @@ xfs_setattr(
 				di_flags |= XFS_DIFLAG_PROJINHERIT;
 			if (vap->va_xflags & XFS_XFLAG_NODEFRAG)
 				di_flags |= XFS_DIFLAG_NODEFRAG;
+			if (vap->va_xflags & XFS_XFLAG_FILESTREAM)
+				di_flags |= XFS_DIFLAG_FILESTREAM;
 			if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
 				if (vap->va_xflags & XFS_XFLAG_RTINHERIT)
 					di_flags |= XFS_DIFLAG_RTINHERIT;
@@ -1201,13 +1173,15 @@ xfs_fsync(
 }
 
 /*
- * This is called by xfs_inactive to free any blocks beyond eof,
- * when the link count isn't zero.
+ * This is called by xfs_inactive to free any blocks beyond eof
+ * when the link count isn't zero and by xfs_dm_punch_hole() when
+ * punching a hole to EOF.
  */
-STATIC int
-xfs_inactive_free_eofblocks(
+int
+xfs_free_eofblocks(
 	xfs_mount_t	*mp,
-	xfs_inode_t	*ip)
+	xfs_inode_t	*ip,
+	int		flags)
 {
 	xfs_trans_t	*tp;
 	int		error;
@@ -1216,6 +1190,7 @@ xfs_inactive_free_eofblocks(
 	xfs_filblks_t	map_len;
 	int		nimaps;
 	xfs_bmbt_irec_t	imap;
+	int		use_iolock = (flags & XFS_FREE_EOF_LOCK);
 
 	/*
 	 * Figure out if there are any blocks beyond the end
@@ -1256,11 +1231,14 @@ xfs_inactive_free_eofblocks(
 		 * cache and we can't
 		 * do that within a transaction.
 		 */
-		xfs_ilock(ip, XFS_IOLOCK_EXCL);
+		if (use_iolock)
+			xfs_ilock(ip, XFS_IOLOCK_EXCL);
 		error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE,
 				    ip->i_size);
 		if (error) {
-			xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+			xfs_trans_cancel(tp, 0);
+			if (use_iolock)
+				xfs_iunlock(ip, XFS_IOLOCK_EXCL);
 			return error;
 		}
 
@@ -1297,7 +1275,8 @@ xfs_inactive_free_eofblocks(
 			error = xfs_trans_commit(tp,
 						XFS_TRANS_RELEASE_LOG_RES);
 		}
-		xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL);
+		xfs_iunlock(ip, (use_iolock ? (XFS_IOLOCK_EXCL|XFS_ILOCK_EXCL)
+					    : XFS_ILOCK_EXCL));
 	}
 	return error;
 }
@@ -1560,6 +1539,31 @@ xfs_release(
 	if (vp->v_vfsp->vfs_flag & VFS_RDONLY)
 		return 0;
 
+	if (!XFS_FORCED_SHUTDOWN(mp)) {
+		/*
+		 * If we are using filestreams, and we have an unlinked
+		 * file that we are processing the last close on, then nothing
+		 * will be able to reopen and write to this file. Purge this
+		 * inode from the filestreams cache so that it doesn't delay
+		 * teardown of the inode.
+		 */
+		if ((ip->i_d.di_nlink == 0) && xfs_inode_is_filestream(ip))
+			xfs_filestream_deassociate(ip);
+
+		/*
+		 * If we previously truncated this file and removed old data
+		 * in the process, we want to initiate "early" writeout on
+		 * the last close.  This is an attempt to combat the notorious
+		 * NULL files problem which is particularly noticable from a
+		 * truncate down, buffered (re-)write (delalloc), followed by
+		 * a crash.  What we are effectively doing here is
+		 * significantly reducing the time window where we'd otherwise
+		 * be exposed to that problem.
+		 */
+		if (VUNTRUNCATE(vp) && VN_DIRTY(vp) && ip->i_delayed_blks > 0)
+			bhv_vop_flush_pages(vp, 0, -1, XFS_B_ASYNC, FI_NONE);
+	}
+
 #ifdef HAVE_REFCACHE
 	/* If we are in the NFS reference cache then don't do this now */
 	if (ip->i_refcache)
@@ -1573,7 +1577,8 @@ xfs_release(
 		     (ip->i_df.if_flags & XFS_IFEXTENTS))  &&
 		    (!(ip->i_d.di_flags &
 				(XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) {
-			if ((error = xfs_inactive_free_eofblocks(mp, ip)))
+			error = xfs_free_eofblocks(mp, ip, XFS_FREE_EOF_LOCK);
+			if (error)
 				return error;
 			/* Update linux inode block count after free above */
 			vn_to_inode(vp)->i_blocks = XFS_FSB_TO_BB(mp,
@@ -1654,7 +1659,8 @@ xfs_inactive(
 		     (!(ip->i_d.di_flags &
 				(XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) ||
 		      (ip->i_delayed_blks != 0)))) {
-			if ((error = xfs_inactive_free_eofblocks(mp, ip)))
+			error = xfs_free_eofblocks(mp, ip, XFS_FREE_EOF_LOCK);
+			if (error)
 				return VN_INACTIVE_CACHE;
 			/* Update linux inode block count after free above */
 			vn_to_inode(vp)->i_blocks = XFS_FSB_TO_BB(mp,
@@ -1680,6 +1686,7 @@ xfs_inactive(
 
 		error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, 0);
 		if (error) {
+			xfs_trans_cancel(tp, 0);
 			xfs_iunlock(ip, XFS_IOLOCK_EXCL);
 			return VN_INACTIVE_CACHE;
 		}
@@ -2217,9 +2224,9 @@ static inline int
 xfs_lock_inumorder(int lock_mode, int subclass)
 {
 	if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL))
-		lock_mode |= (subclass + XFS_IOLOCK_INUMORDER) << XFS_IOLOCK_SHIFT;
+		lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_IOLOCK_SHIFT;
 	if (lock_mode & (XFS_ILOCK_SHARED|XFS_ILOCK_EXCL))
-		lock_mode |= (subclass + XFS_ILOCK_INUMORDER) << XFS_ILOCK_SHIFT;
+		lock_mode |= (subclass + XFS_LOCK_INUMORDER) << XFS_ILOCK_SHIFT;
 
 	return lock_mode;
 }
@@ -2546,6 +2553,15 @@ xfs_remove(
 	 */
 	xfs_refcache_purge_ip(ip);
 
+	/*
+	 * If we are using filestreams, kill the stream association.
+	 * If the file is still open it may get a new one but that
+	 * will get killed on last close in xfs_close() so we don't
+	 * have to worry about that.
+	 */
+	if (link_zero && xfs_inode_is_filestream(ip))
+		xfs_filestream_deassociate(ip);
+
 	vn_trace_exit(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address);
 
 	/*
@@ -4047,22 +4063,16 @@ xfs_alloc_file_space(
 	if (XFS_FORCED_SHUTDOWN(mp))
 		return XFS_ERROR(EIO);
 
-	rt = XFS_IS_REALTIME_INODE(ip);
-	if (unlikely(rt)) {
-		if (!(extsz = ip->i_d.di_extsize))
-			extsz = mp->m_sb.sb_rextsize;
-	} else {
-		extsz = ip->i_d.di_extsize;
-	}
-
 	if ((error = XFS_QM_DQATTACH(mp, ip, 0)))
 		return error;
 
 	if (len <= 0)
 		return XFS_ERROR(EINVAL);
 
+	rt = XFS_IS_REALTIME_INODE(ip);
+	extsz = xfs_get_extsz_hint(ip);
+
 	count = len;
-	error = 0;
 	imapp = &imaps[0];
 	nimaps = 1;
 	bmapi_flag = XFS_BMAPI_WRITE | (alloc_type ? XFS_BMAPI_PREALLOC : 0);
@@ -4678,11 +4688,7 @@ xfs_change_file_space(
 bhv_vnodeops_t xfs_vnodeops = {
 	BHV_IDENTITY_INIT(VN_BHV_XFS,VNODE_POSITION_XFS),
 	.vop_open		= xfs_open,
-	.vop_close		= xfs_close,
 	.vop_read		= xfs_read,
-#ifdef HAVE_SENDFILE
-	.vop_sendfile		= xfs_sendfile,
-#endif
 #ifdef HAVE_SPLICE
 	.vop_splice_read	= xfs_splice_read,
 	.vop_splice_write	= xfs_splice_write,