diff options
Diffstat (limited to 'fs')
79 files changed, 12190 insertions, 8321 deletions
@@ -2019,7 +2019,7 @@ config CODA_FS_OLD_API config AFS_FS tristate "Andrew File System support (AFS) (EXPERIMENTAL)" depends on INET && EXPERIMENTAL - select RXRPC + select AF_RXRPC help If you say Y here, you will get an experimental Andrew File System driver. It currently only supports unsecured read-only AFS access. @@ -2028,8 +2028,15 @@ config AFS_FS If unsure, say N. -config RXRPC - tristate +config AFS_DEBUG + bool "AFS dynamic debugging" + depends on AFS_FS + help + Say Y here to make runtime controllable debugging messages appear. + + See <file:Documentation/filesystems/afs.txt> for more information. + + If unsure, say N. config 9P_FS tristate "Plan 9 Resource Sharing Support (9P2000) (Experimental)" diff --git a/fs/afs/Makefile b/fs/afs/Makefile index 4029c9d..01545eb 100644 --- a/fs/afs/Makefile +++ b/fs/afs/Makefile @@ -2,8 +2,6 @@ # Makefile for Red Hat Linux AFS client. # -#CFLAGS += -finstrument-functions - kafs-objs := \ callback.o \ cell.o \ @@ -12,14 +10,15 @@ kafs-objs := \ file.o \ fsclient.o \ inode.o \ - kafsasyncd.o \ - kafstimod.o \ main.o \ misc.o \ mntpt.o \ proc.o \ + rxrpc.o \ + security.o \ server.o \ super.o \ + use-rtnetlink.o \ vlclient.o \ vlocation.o \ vnode.o \ diff --git a/fs/afs/afs.h b/fs/afs/afs.h new file mode 100644 index 0000000..52d0752 --- /dev/null +++ b/fs/afs/afs.h @@ -0,0 +1,146 @@ +/* AFS common types + * + * Copyright (C) 2002, 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. + */ + +#ifndef AFS_H +#define AFS_H + +#include <linux/in.h> + +#define AFS_MAXCELLNAME 64 /* maximum length of a cell name */ +#define AFS_MAXVOLNAME 64 /* maximum length of a volume name */ + +typedef unsigned afs_volid_t; +typedef unsigned afs_vnodeid_t; +typedef unsigned long long afs_dataversion_t; + +typedef enum { + AFSVL_RWVOL, /* read/write volume */ + AFSVL_ROVOL, /* read-only volume */ + AFSVL_BACKVOL, /* backup volume */ +} __attribute__((packed)) afs_voltype_t; + +typedef enum { + AFS_FTYPE_INVALID = 0, + AFS_FTYPE_FILE = 1, + AFS_FTYPE_DIR = 2, + AFS_FTYPE_SYMLINK = 3, +} afs_file_type_t; + +/* + * AFS file identifier + */ +struct afs_fid { + afs_volid_t vid; /* volume ID */ + afs_vnodeid_t vnode; /* file index within volume */ + unsigned unique; /* unique ID number (file index version) */ +}; + +/* + * AFS callback notification + */ +typedef enum { + AFSCM_CB_UNTYPED = 0, /* no type set on CB break */ + AFSCM_CB_EXCLUSIVE = 1, /* CB exclusive to CM [not implemented] */ + AFSCM_CB_SHARED = 2, /* CB shared by other CM's */ + AFSCM_CB_DROPPED = 3, /* CB promise cancelled by file server */ +} afs_callback_type_t; + +struct afs_callback { + struct afs_fid fid; /* file identifier */ + unsigned version; /* callback version */ + unsigned expiry; /* time at which expires */ + afs_callback_type_t type; /* type of callback */ +}; + +#define AFSCBMAX 50 /* maximum callbacks transferred per bulk op */ + +/* + * AFS volume information + */ +struct afs_volume_info { + afs_volid_t vid; /* volume ID */ + afs_voltype_t type; /* type of this volume */ + afs_volid_t type_vids[5]; /* volume ID's for possible types for this vol */ + + /* list of fileservers serving this volume */ + size_t nservers; /* number of entries used in servers[] */ + struct { + struct in_addr addr; /* fileserver address */ + } servers[8]; +}; + +/* + * AFS security ACE access mask + */ +typedef u32 afs_access_t; +#define AFS_ACE_READ 0x00000001U /* - permission to read a file/dir */ +#define AFS_ACE_WRITE 0x00000002U /* - permission to write/chmod a file */ +#define AFS_ACE_INSERT 0x00000004U /* - permission to create dirent in a dir */ +#define AFS_ACE_LOOKUP 0x00000008U /* - permission to lookup a file/dir in a dir */ +#define AFS_ACE_DELETE 0x00000010U /* - permission to delete a dirent from a dir */ +#define AFS_ACE_LOCK 0x00000020U /* - permission to lock a file */ +#define AFS_ACE_ADMINISTER 0x00000040U /* - permission to change ACL */ +#define AFS_ACE_USER_A 0x01000000U /* - 'A' user-defined permission */ +#define AFS_ACE_USER_B 0x02000000U /* - 'B' user-defined permission */ +#define AFS_ACE_USER_C 0x04000000U /* - 'C' user-defined permission */ +#define AFS_ACE_USER_D 0x08000000U /* - 'D' user-defined permission */ +#define AFS_ACE_USER_E 0x10000000U /* - 'E' user-defined permission */ +#define AFS_ACE_USER_F 0x20000000U /* - 'F' user-defined permission */ +#define AFS_ACE_USER_G 0x40000000U /* - 'G' user-defined permission */ +#define AFS_ACE_USER_H 0x80000000U /* - 'H' user-defined permission */ + +/* + * AFS file status information + */ +struct afs_file_status { + unsigned if_version; /* interface version */ +#define AFS_FSTATUS_VERSION 1 + + afs_file_type_t type; /* file type */ + unsigned nlink; /* link count */ + u64 size; /* file size */ + afs_dataversion_t data_version; /* current data version */ + u32 author; /* author ID */ + u32 owner; /* owner ID */ + u32 group; /* group ID */ + afs_access_t caller_access; /* access rights for authenticated caller */ + afs_access_t anon_access; /* access rights for unauthenticated caller */ + umode_t mode; /* UNIX mode */ + 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 */ +}; + +/* + * AFS file status change request + */ +struct afs_store_status { + u32 mask; /* which bits of the struct are set */ + u32 mtime_client; /* last time client changed data */ + u32 owner; /* owner ID */ + u32 group; /* group ID */ + umode_t mode; /* UNIX mode */ +}; + +#define AFS_SET_MTIME 0x01 /* set the mtime */ +#define AFS_SET_OWNER 0x02 /* set the owner ID */ +#define AFS_SET_GROUP 0x04 /* set the group ID (unsupported?) */ +#define AFS_SET_MODE 0x08 /* set the UNIX mode */ +#define AFS_SET_SEG_SIZE 0x10 /* set the segment size (unsupported) */ + +/* + * AFS volume synchronisation information + */ +struct afs_volsync { + time_t creation; /* volume creation time */ +}; + +#endif /* AFS_H */ diff --git a/fs/afs/afs_cm.h b/fs/afs/afs_cm.h new file mode 100644 index 0000000..7b4d4fa --- /dev/null +++ b/fs/afs/afs_cm.h @@ -0,0 +1,32 @@ +/* AFS Cache Manager definitions + * + * 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. + */ + +#ifndef AFS_CM_H +#define AFS_CM_H + +#define AFS_CM_PORT 7001 /* AFS file server port */ +#define CM_SERVICE 1 /* AFS File Service ID */ + +enum AFS_CM_Operations { + CBCallBack = 204, /* break callback promises */ + CBInitCallBackState = 205, /* initialise callback state */ + CBProbe = 206, /* probe client */ + CBGetLock = 207, /* get contents of CM lock table */ + CBGetCE = 208, /* get cache file description */ + CBGetXStatsVersion = 209, /* get version of extended statistics */ + CBGetXStats = 210, /* get contents of extended statistics data */ + CBInitCallBackState3 = 213, /* initialise callback state, version 3 */ + CBGetCapabilities = 65538, /* get client capabilities */ +}; + +#define AFS_CAP_ERROR_TRANSLATION 0x1 + +#endif /* AFS_FS_H */ diff --git a/fs/afs/afs_fs.h b/fs/afs/afs_fs.h new file mode 100644 index 0000000..89e0d16 --- /dev/null +++ b/fs/afs/afs_fs.h @@ -0,0 +1,48 @@ +/* AFS File Service definitions + * + * 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. + */ + +#ifndef AFS_FS_H +#define AFS_FS_H + +#define AFS_FS_PORT 7000 /* AFS file server port */ +#define FS_SERVICE 1 /* AFS File Service ID */ + +enum AFS_FS_Operations { + FSFETCHDATA = 130, /* AFS Fetch file data */ + FSFETCHSTATUS = 132, /* AFS Fetch file status */ + FSREMOVEFILE = 136, /* AFS Remove a file */ + FSCREATEFILE = 137, /* AFS Create a file */ + FSRENAME = 138, /* AFS Rename or move a file or directory */ + FSSYMLINK = 139, /* AFS Create a symbolic link */ + FSLINK = 140, /* AFS Create a hard link */ + FSMAKEDIR = 141, /* AFS Create a directory */ + FSREMOVEDIR = 142, /* AFS Remove a directory */ + FSGIVEUPCALLBACKS = 147, /* AFS Discard callback promises */ + FSGETVOLUMEINFO = 148, /* AFS Get root volume information */ + FSGETROOTVOLUME = 151, /* AFS Get root volume name */ + FSLOOKUP = 161, /* AFS lookup file in directory */ +}; + +enum AFS_FS_Errors { + VSALVAGE = 101, /* volume needs salvaging */ + VNOVNODE = 102, /* no such file/dir (vnode) */ + VNOVOL = 103, /* no such volume or volume unavailable */ + VVOLEXISTS = 104, /* volume name already exists */ + VNOSERVICE = 105, /* volume not currently in service */ + VOFFLINE = 106, /* volume is currently offline (more info available [VVL-spec]) */ + VONLINE = 107, /* volume is already online */ + VDISKFULL = 108, /* disk partition is full */ + VOVERQUOTA = 109, /* volume's maximum quota exceeded */ + VBUSY = 110, /* volume is temporarily unavailable */ + VMOVED = 111, /* volume moved to new server - ask this FS where */ +}; + +#endif /* AFS_FS_H */ diff --git a/fs/afs/vlclient.h b/fs/afs/afs_vl.h index e3d6011..8bbefe0 100644 --- a/fs/afs/vlclient.h +++ b/fs/afs/afs_vl.h @@ -1,6 +1,6 @@ -/* vlclient.h: Volume Location Service client interface +/* AFS Volume Location Service client interface * - * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. + * Copyright (C) 2002, 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 @@ -9,10 +9,19 @@ * 2 of the License, or (at your option) any later version. */ -#ifndef _LINUX_AFS_VLCLIENT_H -#define _LINUX_AFS_VLCLIENT_H +#ifndef AFS_VL_H +#define AFS_VL_H -#include "types.h" +#include "afs.h" + +#define AFS_VL_PORT 7003 /* volume location service port */ +#define VL_SERVICE 52 /* RxRPC service ID for the Volume Location service */ + +enum AFSVL_Operations { + VLGETENTRYBYID = 503, /* AFS Get Cache Entry By ID operation ID */ + VLGETENTRYBYNAME = 504, /* AFS Get Cache Entry By Name operation ID */ + VLPROBE = 514, /* AFS Probe Volume Location Service operation ID */ +}; enum AFSVL_Errors { AFSVL_IDEXIST = 363520, /* Volume Id entry exists in vl database */ @@ -40,14 +49,16 @@ enum AFSVL_Errors { AFSVL_BADVOLOPER = 363542, /* Bad volume operation code */ AFSVL_BADRELLOCKTYPE = 363543, /* Bad release lock type */ AFSVL_RERELEASE = 363544, /* Status report: last release was aborted */ - AFSVL_BADSERVERFLAG = 363545, /* Invalid replication site server °ag */ + AFSVL_BADSERVERFLAG = 363545, /* Invalid replication site server °ag */ AFSVL_PERM = 363546, /* No permission access */ AFSVL_NOMEM = 363547, /* malloc/realloc failed to alloc enough memory */ }; -/* maps to "struct vldbentry" in vvl-spec.pdf */ +/* + * maps to "struct vldbentry" in vvl-spec.pdf + */ struct afs_vldbentry { - char name[65]; /* name of volume (including NUL char) */ + char name[65]; /* name of volume (with NUL char) */ afs_voltype_t type; /* volume type */ unsigned num_servers; /* num servers that hold instances of this vol */ unsigned clone_id; /* cloning ID */ @@ -68,26 +79,6 @@ struct afs_vldbentry { #define AFS_VLSF_RWVOL 0x0004 /* this server holds a R/W instance of the volume */ #define AFS_VLSF_BACKVOL 0x0008 /* this server holds a backup instance of the volume */ } servers[8]; - }; -/* look up a volume location database entry by name */ -extern int afs_rxvl_get_entry_by_name(struct afs_server *server, - const char *volname, - unsigned volnamesz, - struct afs_cache_vlocation *entry); - -/* look up a volume location database entry by ID */ -extern int afs_rxvl_get_entry_by_id(struct afs_server *server, - afs_volid_t volid, - afs_voltype_t voltype, - struct afs_cache_vlocation *entry); - -extern int afs_rxvl_get_entry_by_id_async(struct afs_async_op *op, - afs_volid_t volid, - afs_voltype_t voltype); - -extern int afs_rxvl_get_entry_by_id_async2(struct afs_async_op *op, - struct afs_cache_vlocation *entry); - -#endif /* _LINUX_AFS_VLCLIENT_H */ +#endif /* AFS_VL_H */ diff --git a/fs/afs/cache.c b/fs/afs/cache.c new file mode 100644 index 0000000..de0d7de --- /dev/null +++ b/fs/afs/cache.c @@ -0,0 +1,256 @@ +/* AFS caching stuff + * + * 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. + */ + +#ifdef AFS_CACHING_SUPPORT +static cachefs_match_val_t afs_cell_cache_match(void *target, + const void *entry); +static void afs_cell_cache_update(void *source, void *entry); + +struct cachefs_index_def afs_cache_cell_index_def = { + .name = "cell_ix", + .data_size = sizeof(struct afs_cache_cell), + .keys[0] = { CACHEFS_INDEX_KEYS_ASCIIZ, 64 }, + .match = afs_cell_cache_match, + .update = afs_cell_cache_update, +}; +#endif + +/* + * match a cell record obtained from the cache + */ +#ifdef AFS_CACHING_SUPPORT +static cachefs_match_val_t afs_cell_cache_match(void *target, + const void *entry) +{ + const struct afs_cache_cell *ccell = entry; + struct afs_cell *cell = target; + + _enter("{%s},{%s}", ccell->name, cell->name); + + if (strncmp(ccell->name, cell->name, sizeof(ccell->name)) == 0) { + _leave(" = SUCCESS"); + return CACHEFS_MATCH_SUCCESS; + } + + _leave(" = FAILED"); + return CACHEFS_MATCH_FAILED; +} +#endif + +/* + * update a cell record in the cache + */ +#ifdef AFS_CACHING_SUPPORT +static void afs_cell_cache_update(void *source, void *entry) +{ + struct afs_cache_cell *ccell = entry; + struct afs_cell *cell = source; + + _enter("%p,%p", source, entry); + + strncpy(ccell->name, cell->name, sizeof(ccell->name)); + + memcpy(ccell->vl_servers, + cell->vl_addrs, + min(sizeof(ccell->vl_servers), sizeof(cell->vl_addrs))); + +} +#endif + +#ifdef AFS_CACHING_SUPPORT +static cachefs_match_val_t afs_vlocation_cache_match(void *target, + const void *entry); +static void afs_vlocation_cache_update(void *source, void *entry); + +struct cachefs_index_def afs_vlocation_cache_index_def = { + .name = "vldb", + .data_size = sizeof(struct afs_cache_vlocation), + .keys[0] = { CACHEFS_INDEX_KEYS_ASCIIZ, 64 }, + .match = afs_vlocation_cache_match, + .update = afs_vlocation_cache_update, +}; +#endif + +/* + * match a VLDB record stored in the cache + * - may also load target from entry + */ +#ifdef AFS_CACHING_SUPPORT +static cachefs_match_val_t afs_vlocation_cache_match(void *target, + const void *entry) +{ + const struct afs_cache_vlocation *vldb = entry; + struct afs_vlocation *vlocation = target; + + _enter("{%s},{%s}", vlocation->vldb.name, vldb->name); + + if (strncmp(vlocation->vldb.name, vldb->name, sizeof(vldb->name)) == 0 + ) { + if (!vlocation->valid || + vlocation->vldb.rtime == vldb->rtime + ) { + vlocation->vldb = *vldb; + vlocation->valid = 1; + _leave(" = SUCCESS [c->m]"); + return CACHEFS_MATCH_SUCCESS; + } else if (memcmp(&vlocation->vldb, vldb, sizeof(*vldb)) != 0) { + /* delete if VIDs for this name differ */ + if (memcmp(&vlocation->vldb.vid, + &vldb->vid, + sizeof(vldb->vid)) != 0) { + _leave(" = DELETE"); + return CACHEFS_MATCH_SUCCESS_DELETE; + } + + _leave(" = UPDATE"); + return CACHEFS_MATCH_SUCCESS_UPDATE; + } else { + _leave(" = SUCCESS"); + return CACHEFS_MATCH_SUCCESS; + } + } + + _leave(" = FAILED"); + return CACHEFS_MATCH_FAILED; +} +#endif + +/* + * update a VLDB record stored in the cache + */ +#ifdef AFS_CACHING_SUPPORT +static void afs_vlocation_cache_update(void *source, void *entry) +{ + struct afs_cache_vlocation *vldb = entry; + struct afs_vlocation *vlocation = source; + + _enter(""); + + *vldb = vlocation->vldb; +} +#endif + +#ifdef AFS_CACHING_SUPPORT +static cachefs_match_val_t afs_volume_cache_match(void *target, + const void *entry); +static void afs_volume_cache_update(void *source, void *entry); + +struct cachefs_index_def afs_volume_cache_index_def = { + .name = "volume", + .data_size = sizeof(struct afs_cache_vhash), + .keys[0] = { CACHEFS_INDEX_KEYS_BIN, 1 }, + .keys[1] = { CACHEFS_INDEX_KEYS_BIN, 1 }, + .match = afs_volume_cache_match, + .update = afs_volume_cache_update, +}; +#endif + +/* + * match a volume hash record stored in the cache + */ +#ifdef AFS_CACHING_SUPPORT +static cachefs_match_val_t afs_volume_cache_match(void *target, + const void *entry) +{ + const struct afs_cache_vhash *vhash = entry; + struct afs_volume *volume = target; + + _enter("{%u},{%u}", volume->type, vhash->vtype); + + if (volume->type == vhash->vtype) { + _leave(" = SUCCESS"); + return CACHEFS_MATCH_SUCCESS; + } + + _leave(" = FAILED"); + return CACHEFS_MATCH_FAILED; +} +#endif + +/* + * update a volume hash record stored in the cache + */ +#ifdef AFS_CACHING_SUPPORT +static void afs_volume_cache_update(void *source, void *entry) +{ + struct afs_cache_vhash *vhash = entry; + struct afs_volume *volume = source; + + _enter(""); + + vhash->vtype = volume->type; +} +#endif + +#ifdef AFS_CACHING_SUPPORT +static cachefs_match_val_t afs_vnode_cache_match(void *target, + const void *entry); +static void afs_vnode_cache_update(void *source, void *entry); + +struct cachefs_index_def afs_vnode_cache_index_def = { + .name = "vnode", + .data_size = sizeof(struct afs_cache_vnode), + .keys[0] = { CACHEFS_INDEX_KEYS_BIN, 4 }, + .match = afs_vnode_cache_match, + .update = afs_vnode_cache_update, +}; +#endif + +/* + * match a vnode record stored in the cache + */ +#ifdef AFS_CACHING_SUPPORT +static cachefs_match_val_t afs_vnode_cache_match(void *target, + const void *entry) +{ + const struct afs_cache_vnode *cvnode = entry; + struct afs_vnode *vnode = target; + + _enter("{%x,%x,%Lx},{%x,%x,%Lx}", + vnode->fid.vnode, + vnode->fid.unique, + vnode->status.version, + cvnode->vnode_id, + cvnode->vnode_unique, + cvnode->data_version); + + if (vnode->fid.vnode != cvnode->vnode_id) { + _leave(" = FAILED"); + return CACHEFS_MATCH_FAILED; + } + + if (vnode->fid.unique != cvnode->vnode_unique || + vnode->status.version != cvnode->data_version) { + _leave(" = DELETE"); + return CACHEFS_MATCH_SUCCESS_DELETE; + } + + _leave(" = SUCCESS"); + return CACHEFS_MATCH_SUCCESS; +} +#endif + +/* + * update a vnode record stored in the cache + */ +#ifdef AFS_CACHING_SUPPORT +static void afs_vnode_cache_update(void *source, void *entry) +{ + struct afs_cache_vnode *cvnode = entry; + struct afs_vnode *vnode = source; + + _enter(""); + + cvnode->vnode_id = vnode->fid.vnode; + cvnode->vnode_unique = vnode->fid.unique; + cvnode->data_version = vnode->status.version; +} +#endif diff --git a/fs/afs/cache.h b/fs/afs/cache.h index 9eb7722..36a3642 100644 --- a/fs/afs/cache.h +++ b/fs/afs/cache.h @@ -1,4 +1,4 @@ -/* cache.h: AFS local cache management interface +/* AFS local cache management interface * * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) @@ -9,8 +9,8 @@ * 2 of the License, or (at your option) any later version. */ -#ifndef _LINUX_AFS_CACHE_H -#define _LINUX_AFS_CACHE_H +#ifndef AFS_CACHE_H +#define AFS_CACHE_H #undef AFS_CACHING_SUPPORT @@ -20,8 +20,4 @@ #endif #include "types.h" -#ifdef __KERNEL__ - -#endif /* __KERNEL__ */ - -#endif /* _LINUX_AFS_CACHE_H */ +#endif /* AFS_CACHE_H */ diff --git a/fs/afs/callback.c b/fs/afs/callback.c index 9cb206e..639399f 100644 --- a/fs/afs/callback.c +++ b/fs/afs/callback.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2002 Red Hat, Inc. All rights reserved. + * Copyright (c) 2002, 2007 Red Hat, Inc. All rights reserved. * * This software may be freely redistributed under the terms of the * GNU General Public License. @@ -16,85 +16,187 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> -#include "server.h" -#include "vnode.h" +#include <linux/circ_buf.h> #include "internal.h" -#include "cmservice.h" -/*****************************************************************************/ +unsigned afs_vnode_update_timeout = 10; + +#define afs_breakring_space(server) \ + CIRC_SPACE((server)->cb_break_head, (server)->cb_break_tail, \ + ARRAY_SIZE((server)->cb_break)) + +//static void afs_callback_updater(struct work_struct *); + +static struct workqueue_struct *afs_callback_update_worker; + /* * allow the fileserver to request callback state (re-)initialisation */ -int SRXAFSCM_InitCallBackState(struct afs_server *server) +void afs_init_callback_state(struct afs_server *server) { - struct list_head callbacks; + struct afs_vnode *vnode; - _enter("%p", server); + _enter("{%p}", server); - INIT_LIST_HEAD(&callbacks); - - /* transfer the callback list from the server to a temp holding area */ spin_lock(&server->cb_lock); - list_add(&callbacks, &server->cb_promises); - list_del_init(&server->cb_promises); + /* kill all the promises on record from this server */ + while (!RB_EMPTY_ROOT(&server->cb_promises)) { + vnode = rb_entry(server->cb_promises.rb_node, + struct afs_vnode, cb_promise); + _debug("UNPROMISE { vid=%x vn=%u uq=%u}", + vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique); + rb_erase(&vnode->cb_promise, &server->cb_promises); + vnode->cb_promised = false; + } - /* munch our way through the list, grabbing the inode, dropping all the - * locks and regetting them in the right order - */ - while (!list_empty(&callbacks)) { - struct afs_vnode *vnode; - struct inode *inode; + spin_unlock(&server->cb_lock); + _leave(""); +} - vnode = list_entry(callbacks.next, struct afs_vnode, cb_link); - list_del_init(&vnode->cb_link); +/* + * handle the data invalidation side of a callback being broken + */ +void afs_broken_callback_work(struct work_struct *work) +{ + struct afs_vnode *vnode = + container_of(work, struct afs_vnode, cb_broken_work); - /* try and grab the inode - may fail */ - inode = igrab(AFS_VNODE_TO_I(vnode)); - if (inode) { - int release = 0; + _enter(""); - spin_unlock(&server->cb_lock); - spin_lock(&vnode->lock); + if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) + return; - if (vnode->cb_server == server) { - vnode->cb_server = NULL; - afs_kafstimod_del_timer(&vnode->cb_timeout); - spin_lock(&afs_cb_hash_lock); - list_del_init(&vnode->cb_hash_link); - spin_unlock(&afs_cb_hash_lock); - release = 1; - } + /* we're only interested in dealing with a broken callback on *this* + * vnode and only if no-one else has dealt with it yet */ + if (!mutex_trylock(&vnode->validate_lock)) + return; /* someone else is dealing with it */ - spin_unlock(&vnode->lock); + if (test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) { + if (S_ISDIR(vnode->vfs_inode.i_mode)) + afs_clear_permits(vnode); - iput(inode); - afs_put_server(server); + if (afs_vnode_fetch_status(vnode, NULL, NULL) < 0) + goto out; - spin_lock(&server->cb_lock); + if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) + goto out; + + /* if the vnode's data version number changed then its contents + * are different */ + if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) { + _debug("zap data {%x:%u}", + vnode->fid.vid, vnode->fid.vnode); + invalidate_remote_inode(&vnode->vfs_inode); } } - spin_unlock(&server->cb_lock); +out: + mutex_unlock(&vnode->validate_lock); - _leave(" = 0"); - return 0; -} /* end SRXAFSCM_InitCallBackState() */ + /* avoid the potential race whereby the mutex_trylock() in this + * function happens again between the clear_bit() and the + * mutex_unlock() */ + if (test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) { + _debug("requeue"); + queue_work(afs_callback_update_worker, &vnode->cb_broken_work); + } + _leave(""); +} + +/* + * actually break a callback + */ +static void afs_break_callback(struct afs_server *server, + struct afs_vnode *vnode) +{ + _enter(""); + + set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags); + + if (vnode->cb_promised) { + spin_lock(&vnode->lock); + + _debug("break callback"); + + spin_lock(&server->cb_lock); + if (vnode->cb_promised) { + rb_erase(&vnode->cb_promise, &server->cb_promises); + vnode->cb_promised = false; + } + spin_unlock(&server->cb_lock); + + queue_work(afs_callback_update_worker, &vnode->cb_broken_work); + spin_unlock(&vnode->lock); + } +} + +/* + * allow the fileserver to explicitly break one callback + * - happens when + * - the backing file is changed + * - a lock is released + */ +static void afs_break_one_callback(struct afs_server *server, + struct afs_fid *fid) +{ + struct afs_vnode *vnode; + struct rb_node *p; + + _debug("find"); + spin_lock(&server->fs_lock); + p = server->fs_vnodes.rb_node; + while (p) { + vnode = rb_entry(p, struct afs_vnode, server_rb); + if (fid->vid < vnode->fid.vid) + p = p->rb_left; + else if (fid->vid > vnode->fid.vid) + p = p->rb_right; + else if (fid->vnode < vnode->fid.vnode) + p = p->rb_left; + else if (fid->vnode > vnode->fid.vnode) + p = p->rb_right; + else if (fid->unique < vnode->fid.unique) + p = p->rb_left; + else if (fid->unique > vnode->fid.unique) + p = p->rb_right; + else + goto found; + } + + /* not found so we just ignore it (it may have moved to another + * server) */ +not_available: + _debug("not avail"); + spin_unlock(&server->fs_lock); + _leave(""); + return; + +found: + _debug("found"); + ASSERTCMP(server, ==, vnode->server); + + if (!igrab(AFS_VNODE_TO_I(vnode))) + goto not_available; + spin_unlock(&server->fs_lock); + + afs_break_callback(server, vnode); + iput(&vnode->vfs_inode); + _leave(""); +} -/*****************************************************************************/ /* * allow the fileserver to break callback promises */ -int SRXAFSCM_CallBack(struct afs_server *server, size_t count, - struct afs_callback callbacks[]) +void afs_break_callbacks(struct afs_server *server, size_t count, + struct afs_callback callbacks[]) { - _enter("%p,%u,", server, count); + _enter("%p,%zu,", server, count); - for (; count > 0; callbacks++, count--) { - struct afs_vnode *vnode = NULL; - struct inode *inode = NULL; - int valid = 0; + ASSERT(server != NULL); + ASSERTCMP(count, <=, AFSCBMAX); + for (; count > 0; callbacks++, count--) { _debug("- Fid { vl=%08x n=%u u=%u } CB { v=%u x=%u t=%u }", callbacks->fid.vid, callbacks->fid.vnode, @@ -103,67 +205,270 @@ int SRXAFSCM_CallBack(struct afs_server *server, size_t count, callbacks->expiry, callbacks->type ); + afs_break_one_callback(server, &callbacks->fid); + } - /* find the inode for this fid */ - spin_lock(&afs_cb_hash_lock); + _leave(""); + return; +} - list_for_each_entry(vnode, - &afs_cb_hash(server, &callbacks->fid), - cb_hash_link) { - if (memcmp(&vnode->fid, &callbacks->fid, - sizeof(struct afs_fid)) != 0) - continue; +/* + * record the callback for breaking + * - the caller must hold server->cb_lock + */ +static void afs_do_give_up_callback(struct afs_server *server, + struct afs_vnode *vnode) +{ + struct afs_callback *cb; - /* right vnode, but is it same server? */ - if (vnode->cb_server != server) - break; /* no */ + _enter("%p,%p", server, vnode); - /* try and nail the inode down */ - inode = igrab(AFS_VNODE_TO_I(vnode)); - break; + cb = &server->cb_break[server->cb_break_head]; + cb->fid = vnode->fid; + cb->version = vnode->cb_version; + cb->expiry = vnode->cb_expiry; + cb->type = vnode->cb_type; + smp_wmb(); + server->cb_break_head = + (server->cb_break_head + 1) & + (ARRAY_SIZE(server->cb_break) - 1); + + /* defer the breaking of callbacks to try and collect as many as + * possible to ship in one operation */ + switch (atomic_inc_return(&server->cb_break_n)) { + case 1 ... AFSCBMAX - 1: + queue_delayed_work(afs_callback_update_worker, + &server->cb_break_work, HZ * 2); + break; + case AFSCBMAX: + afs_flush_callback_breaks(server); + break; + default: + break; + } + + ASSERT(server->cb_promises.rb_node != NULL); + rb_erase(&vnode->cb_promise, &server->cb_promises); + vnode->cb_promised = false; + _leave(""); +} + +/* + * discard the callback on a deleted item + */ +void afs_discard_callback_on_delete(struct afs_vnode *vnode) +{ + struct afs_server *server = vnode->server; + + _enter("%d", vnode->cb_promised); + + if (!vnode->cb_promised) { + _leave(" [not promised]"); + return; + } + + ASSERT(server != NULL); + + spin_lock(&server->cb_lock); + if (vnode->cb_promised) { + ASSERT(server->cb_promises.rb_node != NULL); + rb_erase(&vnode->cb_promise, &server->cb_promises); + vnode->cb_promised = false; + } + spin_unlock(&server->cb_lock); + _leave(""); +} + +/* + * give up the callback registered for a vnode on the file server when the + * inode is being cleared + */ +void afs_give_up_callback(struct afs_vnode *vnode) +{ + struct afs_server *server = vnode->server; + + DECLARE_WAITQUEUE(myself, current); + + _enter("%d", vnode->cb_promised); + + _debug("GIVE UP INODE %p", &vnode->vfs_inode); + + if (!vnode->cb_promised) { + _leave(" [not promised]"); + return; + } + + ASSERT(server != NULL); + + spin_lock(&server->cb_lock); + if (vnode->cb_promised && afs_breakring_space(server) == 0) { + add_wait_queue(&server->cb_break_waitq, &myself); + for (;;) { + set_current_state(TASK_UNINTERRUPTIBLE); + if (!vnode->cb_promised || + afs_breakring_space(server) != 0) + break; + spin_unlock(&server->cb_lock); + schedule(); + spin_lock(&server->cb_lock); } + remove_wait_queue(&server->cb_break_waitq, &myself); + __set_current_state(TASK_RUNNING); + } + + /* of course, it's always possible for the server to break this vnode's + * callback first... */ + if (vnode->cb_promised) + afs_do_give_up_callback(server, vnode); + + spin_unlock(&server->cb_lock); + _leave(""); +} + +/* + * dispatch a deferred give up callbacks operation + */ +void afs_dispatch_give_up_callbacks(struct work_struct *work) +{ + struct afs_server *server = + container_of(work, struct afs_server, cb_break_work.work); + + _enter(""); + + /* tell the fileserver to discard the callback promises it has + * - in the event of ENOMEM or some other error, we just forget that we + * had callbacks entirely, and the server will call us later to break + * them + */ + afs_fs_give_up_callbacks(server, &afs_async_call); +} + +/* + * flush the outstanding callback breaks on a server + */ +void afs_flush_callback_breaks(struct afs_server *server) +{ + cancel_delayed_work(&server->cb_break_work); + queue_delayed_work(afs_callback_update_worker, + &server->cb_break_work, 0); +} - spin_unlock(&afs_cb_hash_lock); - - if (inode) { - /* we've found the record for this vnode */ - spin_lock(&vnode->lock); - if (vnode->cb_server == server) { - /* the callback _is_ on the calling server */ - vnode->cb_server = NULL; - valid = 1; - - afs_kafstimod_del_timer(&vnode->cb_timeout); - vnode->flags |= AFS_VNODE_CHANGED; - - spin_lock(&server->cb_lock); - list_del_init(&vnode->cb_link); - spin_unlock(&server->cb_lock); - - spin_lock(&afs_cb_hash_lock); - list_del_init(&vnode->cb_hash_link); - spin_unlock(&afs_cb_hash_lock); - } - spin_unlock(&vnode->lock); - - if (valid) { - invalidate_remote_inode(inode); - afs_put_server(server); - } - iput(inode); +#if 0 +/* + * update a bunch of callbacks + */ +static void afs_callback_updater(struct work_struct *work) +{ + struct afs_server *server; + struct afs_vnode *vnode, *xvnode; + time_t now; + long timeout; + int ret; + + server = container_of(work, struct afs_server, updater); + + _enter(""); + + now = get_seconds(); + + /* find the first vnode to update */ + spin_lock(&server->cb_lock); + for (;;) { + if (RB_EMPTY_ROOT(&server->cb_promises)) { + spin_unlock(&server->cb_lock); + _leave(" [nothing]"); + return; } + + vnode = rb_entry(rb_first(&server->cb_promises), + struct afs_vnode, cb_promise); + if (atomic_read(&vnode->usage) > 0) + break; + rb_erase(&vnode->cb_promise, &server->cb_promises); + vnode->cb_promised = false; } - _leave(" = 0"); - return 0; -} /* end SRXAFSCM_CallBack() */ + timeout = vnode->update_at - now; + if (timeout > 0) { + queue_delayed_work(afs_vnode_update_worker, + &afs_vnode_update, timeout * HZ); + spin_unlock(&server->cb_lock); + _leave(" [nothing]"); + return; + } + + list_del_init(&vnode->update); + atomic_inc(&vnode->usage); + spin_unlock(&server->cb_lock); + + /* we can now perform the update */ + _debug("update %s", vnode->vldb.name); + vnode->state = AFS_VL_UPDATING; + vnode->upd_rej_cnt = 0; + vnode->upd_busy_cnt = 0; + + ret = afs_vnode_update_record(vl, &vldb); + switch (ret) { + case 0: + afs_vnode_apply_update(vl, &vldb); + vnode->state = AFS_VL_UPDATING; + break; + case -ENOMEDIUM: + vnode->state = AFS_VL_VOLUME_DELETED; + break; + default: + vnode->state = AFS_VL_UNCERTAIN; + break; + } + + /* and then reschedule */ + _debug("reschedule"); + vnode->update_at = get_seconds() + afs_vnode_update_timeout; + + spin_lock(&server->cb_lock); + + if (!list_empty(&server->cb_promises)) { + /* next update in 10 minutes, but wait at least 1 second more + * than the newest record already queued so that we don't spam + * the VL server suddenly with lots of requests + */ + xvnode = list_entry(server->cb_promises.prev, + struct afs_vnode, update); + if (vnode->update_at <= xvnode->update_at) + vnode->update_at = xvnode->update_at + 1; + xvnode = list_entry(server->cb_promises.next, + struct afs_vnode, update); + timeout = xvnode->update_at - now; + if (timeout < 0) + timeout = 0; + } else { + timeout = afs_vnode_update_timeout; + } + + list_add_tail(&vnode->update, &server->cb_promises); + + _debug("timeout %ld", timeout); + queue_delayed_work(afs_vnode_update_worker, + &afs_vnode_update, timeout * HZ); + spin_unlock(&server->cb_lock); + afs_put_vnode(vl); +} +#endif + +/* + * initialise the callback update process + */ +int __init afs_callback_update_init(void) +{ + afs_callback_update_worker = + create_singlethread_workqueue("kafs_callbackd"); + return afs_callback_update_worker ? 0 : -ENOMEM; +} -/*****************************************************************************/ /* - * allow the fileserver to see if the cache manager is still alive + * shut down the callback update process */ -int SRXAFSCM_Probe(struct afs_server *server) +void __exit afs_callback_update_kill(void) { - _debug("SRXAFSCM_Probe(%p)\n", server); - return 0; -} /* end SRXAFSCM_Probe() */ + destroy_workqueue(afs_callback_update_worker); +} diff --git a/fs/afs/cell.c b/fs/afs/cell.c index 1fc5783..9b1311a 100644 --- a/fs/afs/cell.c +++ b/fs/afs/cell.c @@ -1,4 +1,4 @@ -/* cell.c: AFS cell and server record management +/* AFS cell and server record management * * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) @@ -11,15 +11,9 @@ #include <linux/module.h> #include <linux/slab.h> -#include <rxrpc/peer.h> -#include <rxrpc/connection.h> -#include "volume.h" -#include "cell.h" -#include "server.h" -#include "transport.h" -#include "vlclient.h" -#include "kafstimod.h" -#include "super.h" +#include <linux/key.h> +#include <linux/ctype.h> +#include <keys/rxrpc-type.h> #include "internal.h" DECLARE_RWSEM(afs_proc_cells_sem); @@ -28,66 +22,47 @@ LIST_HEAD(afs_proc_cells); static struct list_head afs_cells = LIST_HEAD_INIT(afs_cells); static DEFINE_RWLOCK(afs_cells_lock); static DECLARE_RWSEM(afs_cells_sem); /* add/remove serialisation */ +static DECLARE_WAIT_QUEUE_HEAD(afs_cells_freeable_wq); static struct afs_cell *afs_cell_root; -#ifdef AFS_CACHING_SUPPORT -static cachefs_match_val_t afs_cell_cache_match(void *target, - const void *entry); -static void afs_cell_cache_update(void *source, void *entry); - -struct cachefs_index_def afs_cache_cell_index_def = { - .name = "cell_ix", - .data_size = sizeof(struct afs_cache_cell), - .keys[0] = { CACHEFS_INDEX_KEYS_ASCIIZ, 64 }, - .match = afs_cell_cache_match, - .update = afs_cell_cache_update, -}; -#endif - -/*****************************************************************************/ /* - * create a cell record - * - "name" is the name of the cell - * - "vllist" is a colon separated list of IP addresses in "a.b.c.d" format + * allocate a cell record and fill in its name, VL server address list and + * allocate an anonymous key */ -int afs_cell_create(const char *name, char *vllist, struct afs_cell **_cell) +static struct afs_cell *afs_cell_alloc(const char *name, char *vllist) { struct afs_cell *cell; - char *next; + size_t namelen; + char keyname[4 + AFS_MAXCELLNAME + 1], *cp, *dp, *next; int ret; - _enter("%s", name); + _enter("%s,%s", name, vllist); BUG_ON(!name); /* TODO: want to look up "this cell" in the cache */ + namelen = strlen(name); + if (namelen > AFS_MAXCELLNAME) + return ERR_PTR(-ENAMETOOLONG); + /* allocate and initialise a cell record */ - cell = kmalloc(sizeof(struct afs_cell) + strlen(name) + 1, GFP_KERNEL); + cell = kzalloc(sizeof(struct afs_cell) + namelen + 1, GFP_KERNEL); if (!cell) { _leave(" = -ENOMEM"); - return -ENOMEM; + return ERR_PTR(-ENOMEM); } - down_write(&afs_cells_sem); - - memset(cell, 0, sizeof(struct afs_cell)); - atomic_set(&cell->usage, 0); + memcpy(cell->name, name, namelen); + cell->name[namelen] = 0; + atomic_set(&cell->usage, 1); INIT_LIST_HEAD(&cell->link); - - rwlock_init(&cell->sv_lock); - INIT_LIST_HEAD(&cell->sv_list); - INIT_LIST_HEAD(&cell->sv_graveyard); - spin_lock_init(&cell->sv_gylock); - + rwlock_init(&cell->servers_lock); + INIT_LIST_HEAD(&cell->servers); init_rwsem(&cell->vl_sem); INIT_LIST_HEAD(&cell->vl_list); - INIT_LIST_HEAD(&cell->vl_graveyard); - spin_lock_init(&cell->vl_gylock); - - strcpy(cell->name,name); + spin_lock_init(&cell->vl_lock); /* fill in the VL server list from the rest of the string */ - ret = -EINVAL; do { unsigned a, b, c, d; @@ -96,20 +71,75 @@ int afs_cell_create(const char *name, char *vllist, struct afs_cell **_cell) *next++ = 0; if (sscanf(vllist, "%u.%u.%u.%u", &a, &b, &c, &d) != 4) - goto badaddr; + goto bad_address; if (a > 255 || b > 255 || c > 255 || d > 255) - goto badaddr; + goto bad_address; cell->vl_addrs[cell->vl_naddrs++].s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d); - if (cell->vl_naddrs >= AFS_CELL_MAX_ADDRS) - break; + } while (cell->vl_naddrs < AFS_CELL_MAX_ADDRS && (vllist = next)); + + /* create a key to represent an anonymous user */ + memcpy(keyname, "afs@", 4); + dp = keyname + 4; + cp = cell->name; + do { + *dp++ = toupper(*cp); + } while (*cp++); + cell->anonymous_key = key_alloc(&key_type_rxrpc, keyname, 0, 0, current, + KEY_POS_SEARCH, KEY_ALLOC_NOT_IN_QUOTA); + if (IS_ERR(cell->anonymous_key)) { + _debug("no key"); + ret = PTR_ERR(cell->anonymous_key); + goto error; + } + + ret = key_instantiate_and_link(cell->anonymous_key, NULL, 0, + NULL, NULL); + if (ret < 0) { + _debug("instantiate failed"); + goto error; + } + + _debug("anon key %p{%x}", + cell->anonymous_key, key_serial(cell->anonymous_key)); + + _leave(" = %p", cell); + return cell; + +bad_address: + printk(KERN_ERR "kAFS: bad VL server IP address\n"); + ret = -EINVAL; +error: + key_put(cell->anonymous_key); + kfree(cell); + _leave(" = %d", ret); + return ERR_PTR(ret); +} + +/* + * create a cell record + * - "name" is the name of the cell + * - "vllist" is a colon separated list of IP addresses in "a.b.c.d" format + */ +struct afs_cell *afs_cell_create(const char *name, char *vllist) +{ + struct afs_cell *cell; + int ret; + + _enter("%s,%s", name, vllist); - } while(vllist = next, vllist); + cell = afs_cell_alloc(name, vllist); + if (IS_ERR(cell)) { + _leave(" = %ld", PTR_ERR(cell)); + return cell; + } + + down_write(&afs_cells_sem); - /* add a proc dir for this cell */ + /* add a proc directory for this cell */ ret = afs_proc_cell_setup(cell); if (ret < 0) goto error; @@ -130,31 +160,28 @@ int afs_cell_create(const char *name, char *vllist, struct afs_cell **_cell) down_write(&afs_proc_cells_sem); list_add_tail(&cell->proc_link, &afs_proc_cells); up_write(&afs_proc_cells_sem); - - *_cell = cell; up_write(&afs_cells_sem); - _leave(" = 0 (%p)", cell); - return 0; + _leave(" = %p", cell); + return cell; - badaddr: - printk(KERN_ERR "kAFS: bad VL server IP address: '%s'\n", vllist); - error: +error: up_write(&afs_cells_sem); + key_put(cell->anonymous_key); kfree(cell); _leave(" = %d", ret); - return ret; -} /* end afs_cell_create() */ + return ERR_PTR(ret); +} -/*****************************************************************************/ /* - * initialise the cell database from module parameters + * set the root cell information + * - can be called with a module parameter string + * - can be called from a write to /proc/fs/afs/rootcell */ int afs_cell_init(char *rootcell) { struct afs_cell *old_root, *new_root; char *cp; - int ret; _enter(""); @@ -162,82 +189,60 @@ int afs_cell_init(char *rootcell) /* module is loaded with no parameters, or built statically. * - in the future we might initialize cell DB here. */ - _leave(" = 0 (but no root)"); + _leave(" = 0 [no root]"); return 0; } cp = strchr(rootcell, ':'); if (!cp) { printk(KERN_ERR "kAFS: no VL server IP addresses specified\n"); - _leave(" = %d (no colon)", -EINVAL); + _leave(" = -EINVAL"); return -EINVAL; } /* allocate a cell record for the root cell */ *cp++ = 0; - ret = afs_cell_create(rootcell, cp, &new_root); - if (ret < 0) { - _leave(" = %d", ret); - return ret; + new_root = afs_cell_create(rootcell, cp); + if (IS_ERR(new_root)) { + _leave(" = %ld", PTR_ERR(new_root)); + return PTR_ERR(new_root); } - /* as afs_put_cell() takes locks by itself, we have to do - * a little gymnastics to be race-free. - */ - afs_get_cell(new_root); - + /* install the new cell */ write_lock(&afs_cells_lock); - while (afs_cell_root) { - old_root = afs_cell_root; - afs_cell_root = NULL; - write_unlock(&afs_cells_lock); - afs_put_cell(old_root); - write_lock(&afs_cells_lock); - } + old_root = afs_cell_root; afs_cell_root = new_root; write_unlock(&afs_cells_lock); + afs_put_cell(old_root); - _leave(" = %d", ret); - return ret; - -} /* end afs_cell_init() */ + _leave(" = 0"); + return 0; +} -/*****************************************************************************/ /* * lookup a cell record */ -int afs_cell_lookup(const char *name, unsigned namesz, struct afs_cell **_cell) +struct afs_cell *afs_cell_lookup(const char *name, unsigned namesz) { struct afs_cell *cell; - int ret; _enter("\"%*.*s\",", namesz, namesz, name ? name : ""); - *_cell = NULL; + down_read(&afs_cells_sem); + read_lock(&afs_cells_lock); if (name) { /* if the cell was named, look for it in the cell record list */ - ret = -ENOENT; - cell = NULL; - read_lock(&afs_cells_lock); - list_for_each_entry(cell, &afs_cells, link) { if (strncmp(cell->name, name, namesz) == 0) { afs_get_cell(cell); goto found; } } - cell = NULL; + cell = ERR_PTR(-ENOENT); found: - - read_unlock(&afs_cells_lock); - - if (cell) - ret = 0; - } - else { - read_lock(&afs_cells_lock); - + ; + } else { cell = afs_cell_root; if (!cell) { /* this should not happen unless user tries to mount @@ -246,44 +251,35 @@ int afs_cell_lookup(const char *name, unsigned namesz, struct afs_cell **_cell) * ENOENT might be "more appropriate" but they happen * for other reasons. */ - ret = -EDESTADDRREQ; - } - else { + cell = ERR_PTR(-EDESTADDRREQ); + } else { afs_get_cell(cell); - ret = 0; } - read_unlock(&afs_cells_lock); } - *_cell = cell; - _leave(" = %d (%p)", ret, cell); - return ret; - -} /* end afs_cell_lookup() */ + read_unlock(&afs_cells_lock); + up_read(&afs_cells_sem); + _leave(" = %p", cell); + return cell; +} -/*****************************************************************************/ /* * try and get a cell record */ -struct afs_cell *afs_get_cell_maybe(struct afs_cell **_cell) +struct afs_cell *afs_get_cell_maybe(struct afs_cell *cell) { - struct afs_cell *cell; - write_lock(&afs_cells_lock); - cell = *_cell; if (cell && !list_empty(&cell->link)) afs_get_cell(cell); else cell = NULL; write_unlock(&afs_cells_lock); - return cell; -} /* end afs_get_cell_maybe() */ +} -/*****************************************************************************/ /* * destroy a cell record */ @@ -294,8 +290,7 @@ void afs_put_cell(struct afs_cell *cell) _enter("%p{%d,%s}", cell, atomic_read(&cell->usage), cell->name); - /* sanity check */ - BUG_ON(atomic_read(&cell->usage) <= 0); + ASSERTCMP(atomic_read(&cell->usage), >, 0); /* to prevent a race, the decrement and the dequeue must be effectively * atomic */ @@ -307,36 +302,49 @@ void afs_put_cell(struct afs_cell *cell) return; } + ASSERT(list_empty(&cell->servers)); + ASSERT(list_empty(&cell->vl_list)); + write_unlock(&afs_cells_lock); - BUG_ON(!list_empty(&cell->sv_list)); - BUG_ON(!list_empty(&cell->sv_graveyard)); - BUG_ON(!list_empty(&cell->vl_list)); - BUG_ON(!list_empty(&cell->vl_graveyard)); + wake_up(&afs_cells_freeable_wq); _leave(" [unused]"); -} /* end afs_put_cell() */ +} -/*****************************************************************************/ /* * destroy a cell record + * - must be called with the afs_cells_sem write-locked + * - cell->link should have been broken by the caller */ static void afs_cell_destroy(struct afs_cell *cell) { _enter("%p{%d,%s}", cell, atomic_read(&cell->usage), cell->name); - /* to prevent a race, the decrement and the dequeue must be effectively - * atomic */ - write_lock(&afs_cells_lock); + ASSERTCMP(atomic_read(&cell->usage), >=, 0); + ASSERT(list_empty(&cell->link)); - /* sanity check */ - BUG_ON(atomic_read(&cell->usage) != 0); + /* wait for everyone to stop using the cell */ + if (atomic_read(&cell->usage) > 0) { + DECLARE_WAITQUEUE(myself, current); - list_del_init(&cell->link); + _debug("wait for cell %s", cell->name); + set_current_state(TASK_UNINTERRUPTIBLE); + add_wait_queue(&afs_cells_freeable_wq, &myself); - write_unlock(&afs_cells_lock); + while (atomic_read(&cell->usage) > 0) { + schedule(); + set_current_state(TASK_UNINTERRUPTIBLE); + } - down_write(&afs_cells_sem); + remove_wait_queue(&afs_cells_freeable_wq, &myself); + set_current_state(TASK_RUNNING); + } + + _debug("cell dead"); + ASSERTCMP(atomic_read(&cell->usage), ==, 0); + ASSERT(list_empty(&cell->servers)); + ASSERT(list_empty(&cell->vl_list)); afs_proc_cell_remove(cell); @@ -348,104 +356,26 @@ static void afs_cell_destroy(struct afs_cell *cell) cachefs_relinquish_cookie(cell->cache, 0); #endif - up_write(&afs_cells_sem); - - BUG_ON(!list_empty(&cell->sv_list)); - BUG_ON(!list_empty(&cell->sv_graveyard)); - BUG_ON(!list_empty(&cell->vl_list)); - BUG_ON(!list_empty(&cell->vl_graveyard)); - - /* finish cleaning up the cell */ + key_put(cell->anonymous_key); kfree(cell); _leave(" [destroyed]"); -} /* end afs_cell_destroy() */ - -/*****************************************************************************/ -/* - * lookup the server record corresponding to an Rx RPC peer - */ -int afs_server_find_by_peer(const struct rxrpc_peer *peer, - struct afs_server **_server) -{ - struct afs_server *server; - struct afs_cell *cell; - - _enter("%p{a=%08x},", peer, ntohl(peer->addr.s_addr)); - - /* search the cell list */ - read_lock(&afs_cells_lock); - - list_for_each_entry(cell, &afs_cells, link) { - - _debug("? cell %s",cell->name); - - write_lock(&cell->sv_lock); - - /* check the active list */ - list_for_each_entry(server, &cell->sv_list, link) { - _debug("?? server %08x", ntohl(server->addr.s_addr)); - - if (memcmp(&server->addr, &peer->addr, - sizeof(struct in_addr)) == 0) - goto found_server; - } +} - /* check the inactive list */ - spin_lock(&cell->sv_gylock); - list_for_each_entry(server, &cell->sv_graveyard, link) { - _debug("?? dead server %08x", - ntohl(server->addr.s_addr)); - - if (memcmp(&server->addr, &peer->addr, - sizeof(struct in_addr)) == 0) - goto found_dead_server; - } - spin_unlock(&cell->sv_gylock); - - write_unlock(&cell->sv_lock); - } - read_unlock(&afs_cells_lock); - - _leave(" = -ENOENT"); - return -ENOENT; - - /* we found it in the graveyard - resurrect it */ - found_dead_server: - list_move_tail(&server->link, &cell->sv_list); - afs_get_server(server); - afs_kafstimod_del_timer(&server->timeout); - spin_unlock(&cell->sv_gylock); - goto success; - - /* we found it - increment its ref count and return it */ - found_server: - afs_get_server(server); - - success: - write_unlock(&cell->sv_lock); - read_unlock(&afs_cells_lock); - - *_server = server; - _leave(" = 0 (s=%p c=%p)", server, cell); - return 0; - -} /* end afs_server_find_by_peer() */ - -/*****************************************************************************/ /* * purge in-memory cell database on module unload or afs_init() failure * - the timeout daemon is stopped before calling this */ void afs_cell_purge(void) { - struct afs_vlocation *vlocation; struct afs_cell *cell; _enter(""); afs_put_cell(afs_cell_root); + down_write(&afs_cells_sem); + while (!list_empty(&afs_cells)) { cell = NULL; @@ -464,104 +394,11 @@ void afs_cell_purge(void) _debug("PURGING CELL %s (%d)", cell->name, atomic_read(&cell->usage)); - BUG_ON(!list_empty(&cell->sv_list)); - BUG_ON(!list_empty(&cell->vl_list)); - - /* purge the cell's VL graveyard list */ - _debug(" - clearing VL graveyard"); - - spin_lock(&cell->vl_gylock); - - while (!list_empty(&cell->vl_graveyard)) { - vlocation = list_entry(cell->vl_graveyard.next, - struct afs_vlocation, - link); - list_del_init(&vlocation->link); - - afs_kafstimod_del_timer(&vlocation->timeout); - - spin_unlock(&cell->vl_gylock); - - afs_vlocation_do_timeout(vlocation); - /* TODO: race if move to use krxtimod instead - * of kafstimod */ - - spin_lock(&cell->vl_gylock); - } - - spin_unlock(&cell->vl_gylock); - - /* purge the cell's server graveyard list */ - _debug(" - clearing server graveyard"); - - spin_lock(&cell->sv_gylock); - - while (!list_empty(&cell->sv_graveyard)) { - struct afs_server *server; - - server = list_entry(cell->sv_graveyard.next, - struct afs_server, link); - list_del_init(&server->link); - - afs_kafstimod_del_timer(&server->timeout); - - spin_unlock(&cell->sv_gylock); - - afs_server_do_timeout(server); - - spin_lock(&cell->sv_gylock); - } - - spin_unlock(&cell->sv_gylock); - /* now the cell should be left with no references */ afs_cell_destroy(cell); } } + up_write(&afs_cells_sem); _leave(""); -} /* end afs_cell_purge() */ - -/*****************************************************************************/ -/* - * match a cell record obtained from the cache - */ -#ifdef AFS_CACHING_SUPPORT -static cachefs_match_val_t afs_cell_cache_match(void *target, - const void *entry) -{ - const struct afs_cache_cell *ccell = entry; - struct afs_cell *cell = target; - - _enter("{%s},{%s}", ccell->name, cell->name); - - if (strncmp(ccell->name, cell->name, sizeof(ccell->name)) == 0) { - _leave(" = SUCCESS"); - return CACHEFS_MATCH_SUCCESS; - } - - _leave(" = FAILED"); - return CACHEFS_MATCH_FAILED; -} /* end afs_cell_cache_match() */ -#endif - -/*****************************************************************************/ -/* - * update a cell record in the cache - */ -#ifdef AFS_CACHING_SUPPORT -static void afs_cell_cache_update(void *source, void *entry) -{ - struct afs_cache_cell *ccell = entry; - struct afs_cell *cell = source; - - _enter("%p,%p", source, entry); - - strncpy(ccell->name, cell->name, sizeof(ccell->name)); - - memcpy(ccell->vl_servers, - cell->vl_addrs, - min(sizeof(ccell->vl_servers), sizeof(cell->vl_addrs))); - -} /* end afs_cell_cache_update() */ -#endif +} diff --git a/fs/afs/cell.h b/fs/afs/cell.h deleted file mode 100644 index 4834910..0000000 --- a/fs/afs/cell.h +++ /dev/null @@ -1,78 +0,0 @@ -/* cell.h: AFS cell record - * - * Copyright (C) 2002 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. - */ - -#ifndef _LINUX_AFS_CELL_H -#define _LINUX_AFS_CELL_H - -#include "types.h" -#include "cache.h" - -#define AFS_CELL_MAX_ADDRS 15 - -extern volatile int afs_cells_being_purged; /* T when cells are being purged by rmmod */ - -/*****************************************************************************/ -/* - * entry in the cached cell catalogue - */ -struct afs_cache_cell -{ - char name[64]; /* cell name (padded with NULs) */ - struct in_addr vl_servers[15]; /* cached cell VL servers */ -}; - -/*****************************************************************************/ -/* - * AFS cell record - */ -struct afs_cell -{ - atomic_t usage; - struct list_head link; /* main cell list link */ - struct list_head proc_link; /* /proc cell list link */ - struct proc_dir_entry *proc_dir; /* /proc dir for this cell */ -#ifdef AFS_CACHING_SUPPORT - struct cachefs_cookie *cache; /* caching cookie */ -#endif - - /* server record management */ - rwlock_t sv_lock; /* active server list lock */ - struct list_head sv_list; /* active server list */ - struct list_head sv_graveyard; /* inactive server list */ - spinlock_t sv_gylock; /* inactive server list lock */ - - /* volume location record management */ - struct rw_semaphore vl_sem; /* volume management serialisation semaphore */ - struct list_head vl_list; /* cell's active VL record list */ - struct list_head vl_graveyard; /* cell's inactive VL record list */ - spinlock_t vl_gylock; /* graveyard lock */ - unsigned short vl_naddrs; /* number of VL servers in addr list */ - unsigned short vl_curr_svix; /* current server index */ - struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */ - - char name[0]; /* cell name - must go last */ -}; - -extern int afs_cell_init(char *rootcell); - -extern int afs_cell_create(const char *name, char *vllist, struct afs_cell **_cell); - -extern int afs_cell_lookup(const char *name, unsigned nmsize, struct afs_cell **_cell); - -#define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0) - -extern struct afs_cell *afs_get_cell_maybe(struct afs_cell **_cell); - -extern void afs_put_cell(struct afs_cell *cell); - -extern void afs_cell_purge(void); - -#endif /* _LINUX_AFS_CELL_H */ diff --git a/fs/afs/cmservice.c b/fs/afs/cmservice.c index 3d097fd..6685f4c 100644 --- a/fs/afs/cmservice.c +++ b/fs/afs/cmservice.c @@ -1,4 +1,4 @@ -/* cmservice.c: AFS Cache Manager Service +/* AFS Cache Manager Service * * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) @@ -12,641 +12,463 @@ #include <linux/module.h> #include <linux/init.h> #include <linux/sched.h> -#include <linux/completion.h> -#include "server.h" -#include "cell.h" -#include "transport.h" -#include <rxrpc/rxrpc.h> -#include <rxrpc/transport.h> -#include <rxrpc/connection.h> -#include <rxrpc/call.h> -#include "cmservice.h" +#include <linux/ip.h> #include "internal.h" +#include "afs_cm.h" -static unsigned afscm_usage; /* AFS cache manager usage count */ -static struct rw_semaphore afscm_sem; /* AFS cache manager start/stop semaphore */ - -static int afscm_new_call(struct rxrpc_call *call); -static void afscm_attention(struct rxrpc_call *call); -static void afscm_error(struct rxrpc_call *call); -static void afscm_aemap(struct rxrpc_call *call); - -static void _SRXAFSCM_CallBack(struct rxrpc_call *call); -static void _SRXAFSCM_InitCallBackState(struct rxrpc_call *call); -static void _SRXAFSCM_Probe(struct rxrpc_call *call); - -typedef void (*_SRXAFSCM_xxxx_t)(struct rxrpc_call *call); - -static const struct rxrpc_operation AFSCM_ops[] = { - { - .id = 204, - .asize = RXRPC_APP_MARK_EOF, - .name = "CallBack", - .user = _SRXAFSCM_CallBack, - }, - { - .id = 205, - .asize = RXRPC_APP_MARK_EOF, - .name = "InitCallBackState", - .user = _SRXAFSCM_InitCallBackState, - }, - { - .id = 206, - .asize = RXRPC_APP_MARK_EOF, - .name = "Probe", - .user = _SRXAFSCM_Probe, - }, -#if 0 - { - .id = 207, - .asize = RXRPC_APP_MARK_EOF, - .name = "GetLock", - .user = _SRXAFSCM_GetLock, - }, - { - .id = 208, - .asize = RXRPC_APP_MARK_EOF, - .name = "GetCE", - .user = _SRXAFSCM_GetCE, - }, - { - .id = 209, - .asize = RXRPC_APP_MARK_EOF, - .name = "GetXStatsVersion", - .user = _SRXAFSCM_GetXStatsVersion, - }, - { - .id = 210, - .asize = RXRPC_APP_MARK_EOF, - .name = "GetXStats", - .user = _SRXAFSCM_GetXStats, - } -#endif -}; +struct workqueue_struct *afs_cm_workqueue; -static struct rxrpc_service AFSCM_service = { - .name = "AFS/CM", - .owner = THIS_MODULE, - .link = LIST_HEAD_INIT(AFSCM_service.link), - .new_call = afscm_new_call, - .service_id = 1, - .attn_func = afscm_attention, - .error_func = afscm_error, - .aemap_func = afscm_aemap, - .ops_begin = &AFSCM_ops[0], - .ops_end = &AFSCM_ops[ARRAY_SIZE(AFSCM_ops)], -}; +static int afs_deliver_cb_init_call_back_state(struct afs_call *, + struct sk_buff *, bool); +static int afs_deliver_cb_init_call_back_state3(struct afs_call *, + struct sk_buff *, bool); +static int afs_deliver_cb_probe(struct afs_call *, struct sk_buff *, bool); +static int afs_deliver_cb_callback(struct afs_call *, struct sk_buff *, bool); +static int afs_deliver_cb_get_capabilities(struct afs_call *, struct sk_buff *, + bool); +static void afs_cm_destructor(struct afs_call *); -static DECLARE_COMPLETION(kafscmd_alive); -static DECLARE_COMPLETION(kafscmd_dead); -static DECLARE_WAIT_QUEUE_HEAD(kafscmd_sleepq); -static LIST_HEAD(kafscmd_attention_list); -static LIST_HEAD(afscm_calls); -static DEFINE_SPINLOCK(afscm_calls_lock); -static DEFINE_SPINLOCK(kafscmd_attention_lock); -static int kafscmd_die; - -/*****************************************************************************/ /* - * AFS Cache Manager kernel thread + * CB.CallBack operation type */ -static int kafscmd(void *arg) -{ - DECLARE_WAITQUEUE(myself, current); - - struct rxrpc_call *call; - _SRXAFSCM_xxxx_t func; - int die; - - printk(KERN_INFO "kAFS: Started kafscmd %d\n", current->pid); - - daemonize("kafscmd"); - - complete(&kafscmd_alive); - - /* loop around looking for things to attend to */ - do { - if (list_empty(&kafscmd_attention_list)) { - set_current_state(TASK_INTERRUPTIBLE); - add_wait_queue(&kafscmd_sleepq, &myself); - - for (;;) { - set_current_state(TASK_INTERRUPTIBLE); - if (!list_empty(&kafscmd_attention_list) || - signal_pending(current) || - kafscmd_die) - break; - - schedule(); - } - - remove_wait_queue(&kafscmd_sleepq, &myself); - set_current_state(TASK_RUNNING); - } - - die = kafscmd_die; - - /* dequeue the next call requiring attention */ - call = NULL; - spin_lock(&kafscmd_attention_lock); - - if (!list_empty(&kafscmd_attention_list)) { - call = list_entry(kafscmd_attention_list.next, - struct rxrpc_call, - app_attn_link); - list_del_init(&call->app_attn_link); - die = 0; - } - - spin_unlock(&kafscmd_attention_lock); - - if (call) { - /* act upon it */ - _debug("@@@ Begin Attend Call %p", call); - - func = call->app_user; - if (func) - func(call); - - rxrpc_put_call(call); - - _debug("@@@ End Attend Call %p", call); - } - - } while(!die); - - /* and that's all */ - complete_and_exit(&kafscmd_dead, 0); - -} /* end kafscmd() */ +static const struct afs_call_type afs_SRXCBCallBack = { + .name = "CB.CallBack", + .deliver = afs_deliver_cb_callback, + .abort_to_error = afs_abort_to_error, + .destructor = afs_cm_destructor, +}; -/*****************************************************************************/ /* - * handle a call coming in to the cache manager - * - if I want to keep the call, I must increment its usage count - * - the return value will be negated and passed back in an abort packet if - * non-zero - * - serialised by virtue of there only being one krxiod + * CB.InitCallBackState operation type */ -static int afscm_new_call(struct rxrpc_call *call) -{ - _enter("%p{cid=%u u=%d}", - call, ntohl(call->call_id), atomic_read(&call->usage)); - - rxrpc_get_call(call); - - /* add to my current call list */ - spin_lock(&afscm_calls_lock); - list_add(&call->app_link,&afscm_calls); - spin_unlock(&afscm_calls_lock); - - _leave(" = 0"); - return 0; - -} /* end afscm_new_call() */ +static const struct afs_call_type afs_SRXCBInitCallBackState = { + .name = "CB.InitCallBackState", + .deliver = afs_deliver_cb_init_call_back_state, + .abort_to_error = afs_abort_to_error, + .destructor = afs_cm_destructor, +}; -/*****************************************************************************/ /* - * queue on the kafscmd queue for attention + * CB.InitCallBackState3 operation type */ -static void afscm_attention(struct rxrpc_call *call) -{ - _enter("%p{cid=%u u=%d}", - call, ntohl(call->call_id), atomic_read(&call->usage)); - - spin_lock(&kafscmd_attention_lock); - - if (list_empty(&call->app_attn_link)) { - list_add_tail(&call->app_attn_link, &kafscmd_attention_list); - rxrpc_get_call(call); - } - - spin_unlock(&kafscmd_attention_lock); - - wake_up(&kafscmd_sleepq); - - _leave(" {u=%d}", atomic_read(&call->usage)); -} /* end afscm_attention() */ +static const struct afs_call_type afs_SRXCBInitCallBackState3 = { + .name = "CB.InitCallBackState3", + .deliver = afs_deliver_cb_init_call_back_state3, + .abort_to_error = afs_abort_to_error, + .destructor = afs_cm_destructor, +}; -/*****************************************************************************/ /* - * handle my call being aborted - * - clean up, dequeue and put my ref to the call + * CB.Probe operation type */ -static void afscm_error(struct rxrpc_call *call) -{ - int removed; - - _enter("%p{est=%s ac=%u er=%d}", - call, - rxrpc_call_error_states[call->app_err_state], - call->app_abort_code, - call->app_errno); - - spin_lock(&kafscmd_attention_lock); - - if (list_empty(&call->app_attn_link)) { - list_add_tail(&call->app_attn_link, &kafscmd_attention_list); - rxrpc_get_call(call); - } - - spin_unlock(&kafscmd_attention_lock); - - removed = 0; - spin_lock(&afscm_calls_lock); - if (!list_empty(&call->app_link)) { - list_del_init(&call->app_link); - removed = 1; - } - spin_unlock(&afscm_calls_lock); - - if (removed) - rxrpc_put_call(call); - - wake_up(&kafscmd_sleepq); +static const struct afs_call_type afs_SRXCBProbe = { + .name = "CB.Probe", + .deliver = afs_deliver_cb_probe, + .abort_to_error = afs_abort_to_error, + .destructor = afs_cm_destructor, +}; - _leave(""); -} /* end afscm_error() */ +/* + * CB.GetCapabilities operation type + */ +static const struct afs_call_type afs_SRXCBGetCapabilites = { + .name = "CB.GetCapabilities", + .deliver = afs_deliver_cb_get_capabilities, + .abort_to_error = afs_abort_to_error, + .destructor = afs_cm_destructor, +}; -/*****************************************************************************/ /* - * map afs abort codes to/from Linux error codes - * - called with call->lock held + * route an incoming cache manager call + * - return T if supported, F if not */ -static void afscm_aemap(struct rxrpc_call *call) +bool afs_cm_incoming_call(struct afs_call *call) { - switch (call->app_err_state) { - case RXRPC_ESTATE_LOCAL_ABORT: - call->app_abort_code = -call->app_errno; - break; - case RXRPC_ESTATE_PEER_ABORT: - call->app_errno = -ECONNABORTED; - break; + u32 operation_id = ntohl(call->operation_ID); + + _enter("{CB.OP %u}", operation_id); + + switch (operation_id) { + case CBCallBack: + call->type = &afs_SRXCBCallBack; + return true; + case CBInitCallBackState: + call->type = &afs_SRXCBInitCallBackState; + return true; + case CBInitCallBackState3: + call->type = &afs_SRXCBInitCallBackState3; + return true; + case CBProbe: + call->type = &afs_SRXCBProbe; + return true; + case CBGetCapabilities: + call->type = &afs_SRXCBGetCapabilites; + return true; default: - break; + return false; } -} /* end afscm_aemap() */ +} -/*****************************************************************************/ /* - * start the cache manager service if not already started + * clean up a cache manager call */ -int afscm_start(void) +static void afs_cm_destructor(struct afs_call *call) { - int ret; - - down_write(&afscm_sem); - if (!afscm_usage) { - ret = kernel_thread(kafscmd, NULL, 0); - if (ret < 0) - goto out; - - wait_for_completion(&kafscmd_alive); - - ret = rxrpc_add_service(afs_transport, &AFSCM_service); - if (ret < 0) - goto kill; - - afs_kafstimod_add_timer(&afs_mntpt_expiry_timer, - afs_mntpt_expiry_timeout * HZ); - } - - afscm_usage++; - up_write(&afscm_sem); - - return 0; - - kill: - kafscmd_die = 1; - wake_up(&kafscmd_sleepq); - wait_for_completion(&kafscmd_dead); - - out: - up_write(&afscm_sem); - return ret; + _enter(""); -} /* end afscm_start() */ + afs_put_server(call->server); + call->server = NULL; + kfree(call->buffer); + call->buffer = NULL; +} -/*****************************************************************************/ /* - * stop the cache manager service + * allow the fileserver to see if the cache manager is still alive */ -void afscm_stop(void) +static void SRXAFSCB_CallBack(struct work_struct *work) { - struct rxrpc_call *call; + struct afs_call *call = container_of(work, struct afs_call, work); - down_write(&afscm_sem); + _enter(""); - BUG_ON(afscm_usage == 0); - afscm_usage--; + /* be sure to send the reply *before* attempting to spam the AFS server + * with FSFetchStatus requests on the vnodes with broken callbacks lest + * the AFS server get into a vicious cycle of trying to break further + * callbacks because it hadn't received completion of the CBCallBack op + * yet */ + afs_send_empty_reply(call); - if (afscm_usage == 0) { - /* don't want more incoming calls */ - rxrpc_del_service(afs_transport, &AFSCM_service); - - /* abort any calls I've still got open (the afscm_error() will - * dequeue them) */ - spin_lock(&afscm_calls_lock); - while (!list_empty(&afscm_calls)) { - call = list_entry(afscm_calls.next, - struct rxrpc_call, - app_link); + afs_break_callbacks(call->server, call->count, call->request); + _leave(""); +} - list_del_init(&call->app_link); - rxrpc_get_call(call); - spin_unlock(&afscm_calls_lock); +/* + * deliver request data to a CB.CallBack call + */ +static int afs_deliver_cb_callback(struct afs_call *call, struct sk_buff *skb, + bool last) +{ + struct afs_callback *cb; + struct afs_server *server; + struct in_addr addr; + __be32 *bp; + u32 tmp; + int ret, loop; + + _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); + + switch (call->unmarshall) { + case 0: + call->offset = 0; + call->unmarshall++; + + /* extract the FID array and its count in two steps */ + case 1: + _debug("extract FID count"); + ret = afs_extract_data(call, skb, last, &call->tmp, 4); + switch (ret) { + case 0: break; + case -EAGAIN: return 0; + default: return ret; + } - rxrpc_call_abort(call, -ESRCH); /* abort, dequeue and - * put */ + call->count = ntohl(call->tmp); + _debug("FID count: %u", call->count); + if (call->count > AFSCBMAX) + return -EBADMSG; + + call->buffer = kmalloc(call->count * 3 * 4, GFP_KERNEL); + if (!call->buffer) + return -ENOMEM; + call->offset = 0; + call->unmarshall++; + + case 2: + _debug("extract FID array"); + ret = afs_extract_data(call, skb, last, call->buffer, + call->count * 3 * 4); + switch (ret) { + case 0: break; + case -EAGAIN: return 0; + default: return ret; + } - _debug("nuking active call %08x.%d", - ntohl(call->conn->conn_id), - ntohl(call->call_id)); - rxrpc_put_call(call); - rxrpc_put_call(call); + _debug("unmarshall FID array"); + call->request = kcalloc(call->count, + sizeof(struct afs_callback), + GFP_KERNEL); + if (!call->request) + return -ENOMEM; + + cb = call->request; + bp = call->buffer; + for (loop = call->count; loop > 0; loop--, cb++) { + cb->fid.vid = ntohl(*bp++); + cb->fid.vnode = ntohl(*bp++); + cb->fid.unique = ntohl(*bp++); + cb->type = AFSCM_CB_UNTYPED; + } - spin_lock(&afscm_calls_lock); + call->offset = 0; + call->unmarshall++; + + /* extract the callback array and its count in two steps */ + case 3: + _debug("extract CB count"); + ret = afs_extract_data(call, skb, last, &call->tmp, 4); + switch (ret) { + case 0: break; + case -EAGAIN: return 0; + default: return ret; } - spin_unlock(&afscm_calls_lock); - /* get rid of my daemon */ - kafscmd_die = 1; - wake_up(&kafscmd_sleepq); - wait_for_completion(&kafscmd_dead); + tmp = ntohl(call->tmp); + _debug("CB count: %u", tmp); + if (tmp != call->count && tmp != 0) + return -EBADMSG; + call->offset = 0; + call->unmarshall++; + if (tmp == 0) + goto empty_cb_array; + + case 4: + _debug("extract CB array"); + ret = afs_extract_data(call, skb, last, call->request, + call->count * 3 * 4); + switch (ret) { + case 0: break; + case -EAGAIN: return 0; + default: return ret; + } - /* dispose of any calls waiting for attention */ - spin_lock(&kafscmd_attention_lock); - while (!list_empty(&kafscmd_attention_list)) { - call = list_entry(kafscmd_attention_list.next, - struct rxrpc_call, - app_attn_link); + _debug("unmarshall CB array"); + cb = call->request; + bp = call->buffer; + for (loop = call->count; loop > 0; loop--, cb++) { + cb->version = ntohl(*bp++); + cb->expiry = ntohl(*bp++); + cb->type = ntohl(*bp++); + } - list_del_init(&call->app_attn_link); - spin_unlock(&kafscmd_attention_lock); + empty_cb_array: + call->offset = 0; + call->unmarshall++; - rxrpc_put_call(call); + case 5: + _debug("trailer"); + if (skb->len != 0) + return -EBADMSG; + break; + } - spin_lock(&kafscmd_attention_lock); - } - spin_unlock(&kafscmd_attention_lock); + if (!last) + return 0; - afs_kafstimod_del_timer(&afs_mntpt_expiry_timer); - } + call->state = AFS_CALL_REPLYING; - up_write(&afscm_sem); + /* we'll need the file server record as that tells us which set of + * vnodes to operate upon */ + memcpy(&addr, &ip_hdr(skb)->saddr, 4); + server = afs_find_server(&addr); + if (!server) + return -ENOTCONN; + call->server = server; -} /* end afscm_stop() */ + INIT_WORK(&call->work, SRXAFSCB_CallBack); + schedule_work(&call->work); + return 0; +} -/*****************************************************************************/ /* - * handle the fileserver breaking a set of callbacks + * allow the fileserver to request callback state (re-)initialisation */ -static void _SRXAFSCM_CallBack(struct rxrpc_call *call) +static void SRXAFSCB_InitCallBackState(struct work_struct *work) { - struct afs_server *server; - size_t count, qty, tmp; - int ret = 0, removed; - - _enter("%p{acs=%s}", call, rxrpc_call_states[call->app_call_state]); - - server = afs_server_get_from_peer(call->conn->peer); - - switch (call->app_call_state) { - /* we've received the last packet - * - drain all the data from the call and send the reply - */ - case RXRPC_CSTATE_SRVR_GOT_ARGS: - ret = -EBADMSG; - qty = call->app_ready_qty; - if (qty < 8 || qty > 50 * (6 * 4) + 8) - break; - - { - struct afs_callback *cb, *pcb; - int loop; - __be32 *fp, *bp; - - fp = rxrpc_call_alloc_scratch(call, qty); - - /* drag the entire argument block out to the scratch - * space */ - ret = rxrpc_call_read_data(call, fp, qty, 0); - if (ret < 0) - break; - - /* and unmarshall the parameter block */ - ret = -EBADMSG; - count = ntohl(*fp++); - if (count>AFSCBMAX || - (count * (3 * 4) + 8 != qty && - count * (6 * 4) + 8 != qty)) - break; - - bp = fp + count*3; - tmp = ntohl(*bp++); - if (tmp > 0 && tmp != count) - break; - if (tmp == 0) - bp = NULL; - - pcb = cb = rxrpc_call_alloc_scratch_s( - call, struct afs_callback); - - for (loop = count - 1; loop >= 0; loop--) { - pcb->fid.vid = ntohl(*fp++); - pcb->fid.vnode = ntohl(*fp++); - pcb->fid.unique = ntohl(*fp++); - if (bp) { - pcb->version = ntohl(*bp++); - pcb->expiry = ntohl(*bp++); - pcb->type = ntohl(*bp++); - } - else { - pcb->version = 0; - pcb->expiry = 0; - pcb->type = AFSCM_CB_UNTYPED; - } - pcb++; - } - - /* invoke the actual service routine */ - ret = SRXAFSCM_CallBack(server, count, cb); - if (ret < 0) - break; - } + struct afs_call *call = container_of(work, struct afs_call, work); - /* send the reply */ - ret = rxrpc_call_write_data(call, 0, NULL, RXRPC_LAST_PACKET, - GFP_KERNEL, 0, &count); - if (ret < 0) - break; - break; - - /* operation complete */ - case RXRPC_CSTATE_COMPLETE: - call->app_user = NULL; - removed = 0; - spin_lock(&afscm_calls_lock); - if (!list_empty(&call->app_link)) { - list_del_init(&call->app_link); - removed = 1; - } - spin_unlock(&afscm_calls_lock); + _enter("{%p}", call->server); - if (removed) - rxrpc_put_call(call); - break; + afs_init_callback_state(call->server); + afs_send_empty_reply(call); + _leave(""); +} - /* operation terminated on error */ - case RXRPC_CSTATE_ERROR: - call->app_user = NULL; - break; +/* + * deliver request data to a CB.InitCallBackState call + */ +static int afs_deliver_cb_init_call_back_state(struct afs_call *call, + struct sk_buff *skb, + bool last) +{ + struct afs_server *server; + struct in_addr addr; - default: - break; - } + _enter(",{%u},%d", skb->len, last); - if (ret < 0) - rxrpc_call_abort(call, ret); + if (skb->len > 0) + return -EBADMSG; + if (!last) + return 0; - afs_put_server(server); + /* no unmarshalling required */ + call->state = AFS_CALL_REPLYING; - _leave(" = %d", ret); + /* we'll need the file server record as that tells us which set of + * vnodes to operate upon */ + memcpy(&addr, &ip_hdr(skb)->saddr, 4); + server = afs_find_server(&addr); + if (!server) + return -ENOTCONN; + call->server = server; -} /* end _SRXAFSCM_CallBack() */ + INIT_WORK(&call->work, SRXAFSCB_InitCallBackState); + schedule_work(&call->work); + return 0; +} -/*****************************************************************************/ /* - * handle the fileserver asking us to initialise our callback state + * deliver request data to a CB.InitCallBackState3 call */ -static void _SRXAFSCM_InitCallBackState(struct rxrpc_call *call) +static int afs_deliver_cb_init_call_back_state3(struct afs_call *call, + struct sk_buff *skb, + bool last) { struct afs_server *server; - size_t count; - int ret = 0, removed; + struct in_addr addr; - _enter("%p{acs=%s}", call, rxrpc_call_states[call->app_call_state]); + _enter(",{%u},%d", skb->len, last); - server = afs_server_get_from_peer(call->conn->peer); + if (!last) + return 0; - switch (call->app_call_state) { - /* we've received the last packet - drain all the data from the - * call */ - case RXRPC_CSTATE_SRVR_GOT_ARGS: - /* shouldn't be any args */ - ret = -EBADMSG; - break; - - /* send the reply when asked for it */ - case RXRPC_CSTATE_SRVR_SND_REPLY: - /* invoke the actual service routine */ - ret = SRXAFSCM_InitCallBackState(server); - if (ret < 0) - break; - - ret = rxrpc_call_write_data(call, 0, NULL, RXRPC_LAST_PACKET, - GFP_KERNEL, 0, &count); - if (ret < 0) - break; - break; + /* no unmarshalling required */ + call->state = AFS_CALL_REPLYING; - /* operation complete */ - case RXRPC_CSTATE_COMPLETE: - call->app_user = NULL; - removed = 0; - spin_lock(&afscm_calls_lock); - if (!list_empty(&call->app_link)) { - list_del_init(&call->app_link); - removed = 1; - } - spin_unlock(&afscm_calls_lock); + /* we'll need the file server record as that tells us which set of + * vnodes to operate upon */ + memcpy(&addr, &ip_hdr(skb)->saddr, 4); + server = afs_find_server(&addr); + if (!server) + return -ENOTCONN; + call->server = server; - if (removed) - rxrpc_put_call(call); - break; - - /* operation terminated on error */ - case RXRPC_CSTATE_ERROR: - call->app_user = NULL; - break; - - default: - break; - } - - if (ret < 0) - rxrpc_call_abort(call, ret); - - afs_put_server(server); + INIT_WORK(&call->work, SRXAFSCB_InitCallBackState); + schedule_work(&call->work); + return 0; +} - _leave(" = %d", ret); +/* + * allow the fileserver to see if the cache manager is still alive + */ +static void SRXAFSCB_Probe(struct work_struct *work) +{ + struct afs_call *call = container_of(work, struct afs_call, work); -} /* end _SRXAFSCM_InitCallBackState() */ + _enter(""); + afs_send_empty_reply(call); + _leave(""); +} -/*****************************************************************************/ /* - * handle a probe from a fileserver + * deliver request data to a CB.Probe call */ -static void _SRXAFSCM_Probe(struct rxrpc_call *call) +static int afs_deliver_cb_probe(struct afs_call *call, struct sk_buff *skb, + bool last) { - struct afs_server *server; - size_t count; - int ret = 0, removed; - - _enter("%p{acs=%s}", call, rxrpc_call_states[call->app_call_state]); + _enter(",{%u},%d", skb->len, last); - server = afs_server_get_from_peer(call->conn->peer); + if (skb->len > 0) + return -EBADMSG; + if (!last) + return 0; - switch (call->app_call_state) { - /* we've received the last packet - drain all the data from the - * call */ - case RXRPC_CSTATE_SRVR_GOT_ARGS: - /* shouldn't be any args */ - ret = -EBADMSG; - break; + /* no unmarshalling required */ + call->state = AFS_CALL_REPLYING; - /* send the reply when asked for it */ - case RXRPC_CSTATE_SRVR_SND_REPLY: - /* invoke the actual service routine */ - ret = SRXAFSCM_Probe(server); - if (ret < 0) - break; - - ret = rxrpc_call_write_data(call, 0, NULL, RXRPC_LAST_PACKET, - GFP_KERNEL, 0, &count); - if (ret < 0) - break; - break; + INIT_WORK(&call->work, SRXAFSCB_Probe); + schedule_work(&call->work); + return 0; +} - /* operation complete */ - case RXRPC_CSTATE_COMPLETE: - call->app_user = NULL; - removed = 0; - spin_lock(&afscm_calls_lock); - if (!list_empty(&call->app_link)) { - list_del_init(&call->app_link); - removed = 1; +/* + * allow the fileserver to ask about the cache manager's capabilities + */ +static void SRXAFSCB_GetCapabilities(struct work_struct *work) +{ + struct afs_interface *ifs; + struct afs_call *call = container_of(work, struct afs_call, work); + int loop, nifs; + + struct { + struct /* InterfaceAddr */ { + __be32 nifs; + __be32 uuid[11]; + __be32 ifaddr[32]; + __be32 netmask[32]; + __be32 mtu[32]; + } ia; + struct /* Capabilities */ { + __be32 capcount; + __be32 caps[1]; + } cap; + } reply; + + _enter(""); + + nifs = 0; + ifs = kcalloc(32, sizeof(*ifs), GFP_KERNEL); + if (ifs) { + nifs = afs_get_ipv4_interfaces(ifs, 32, false); + if (nifs < 0) { + kfree(ifs); + ifs = NULL; + nifs = 0; } - spin_unlock(&afscm_calls_lock); + } - if (removed) - rxrpc_put_call(call); - break; + memset(&reply, 0, sizeof(reply)); + reply.ia.nifs = htonl(nifs); + + reply.ia.uuid[0] = htonl(afs_uuid.time_low); + reply.ia.uuid[1] = htonl(afs_uuid.time_mid); + reply.ia.uuid[2] = htonl(afs_uuid.time_hi_and_version); + reply.ia.uuid[3] = htonl((s8) afs_uuid.clock_seq_hi_and_reserved); + reply.ia.uuid[4] = htonl((s8) afs_uuid.clock_seq_low); + for (loop = 0; loop < 6; loop++) + reply.ia.uuid[loop + 5] = htonl((s8) afs_uuid.node[loop]); + + if (ifs) { + for (loop = 0; loop < nifs; loop++) { + reply.ia.ifaddr[loop] = ifs[loop].address.s_addr; + reply.ia.netmask[loop] = ifs[loop].netmask.s_addr; + reply.ia.mtu[loop] = htonl(ifs[loop].mtu); + } + } - /* operation terminated on error */ - case RXRPC_CSTATE_ERROR: - call->app_user = NULL; - break; + reply.cap.capcount = htonl(1); + reply.cap.caps[0] = htonl(AFS_CAP_ERROR_TRANSLATION); + afs_send_simple_reply(call, &reply, sizeof(reply)); - default: - break; - } + _leave(""); +} - if (ret < 0) - rxrpc_call_abort(call, ret); +/* + * deliver request data to a CB.GetCapabilities call + */ +static int afs_deliver_cb_get_capabilities(struct afs_call *call, + struct sk_buff *skb, bool last) +{ + _enter(",{%u},%d", skb->len, last); - afs_put_server(server); + if (skb->len > 0) + return -EBADMSG; + if (!last) + return 0; - _leave(" = %d", ret); + /* no unmarshalling required */ + call->state = AFS_CALL_REPLYING; -} /* end _SRXAFSCM_Probe() */ + INIT_WORK(&call->work, SRXAFSCB_GetCapabilities); + schedule_work(&call->work); + return 0; +} diff --git a/fs/afs/cmservice.h b/fs/afs/cmservice.h deleted file mode 100644 index af8d4d6..0000000 --- a/fs/afs/cmservice.h +++ /dev/null @@ -1,29 +0,0 @@ -/* cmservice.h: AFS Cache Manager Service declarations - * - * Copyright (C) 2002 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. - */ - -#ifndef _LINUX_AFS_CMSERVICE_H -#define _LINUX_AFS_CMSERVICE_H - -#include <rxrpc/transport.h> -#include "types.h" - -/* cache manager start/stop */ -extern int afscm_start(void); -extern void afscm_stop(void); - -/* cache manager server functions */ -extern int SRXAFSCM_InitCallBackState(struct afs_server *server); -extern int SRXAFSCM_CallBack(struct afs_server *server, - size_t count, - struct afs_callback callbacks[]); -extern int SRXAFSCM_Probe(struct afs_server *server); - -#endif /* _LINUX_AFS_CMSERVICE_H */ diff --git a/fs/afs/dir.c b/fs/afs/dir.c index b6dc2eb..dac5b99 100644 --- a/fs/afs/dir.c +++ b/fs/afs/dir.c @@ -15,45 +15,53 @@ #include <linux/slab.h> #include <linux/fs.h> #include <linux/pagemap.h> -#include <linux/smp_lock.h> -#include "vnode.h" -#include "volume.h" -#include <rxrpc/call.h> -#include "super.h" +#include <linux/ctype.h> #include "internal.h" -static struct dentry *afs_dir_lookup(struct inode *dir, struct dentry *dentry, - struct nameidata *nd); +static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, + struct nameidata *nd); static int afs_dir_open(struct inode *inode, struct file *file); -static int afs_dir_readdir(struct file *file, void *dirent, filldir_t filldir); +static int afs_readdir(struct file *file, void *dirent, filldir_t filldir); static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd); static int afs_d_delete(struct dentry *dentry); -static int afs_dir_lookup_filldir(void *_cookie, const char *name, int nlen, +static void afs_d_release(struct dentry *dentry); +static int afs_lookup_filldir(void *_cookie, const char *name, int nlen, loff_t fpos, u64 ino, unsigned dtype); +static int afs_create(struct inode *dir, struct dentry *dentry, int mode, + struct nameidata *nd); +static int afs_mkdir(struct inode *dir, struct dentry *dentry, int mode); +static int afs_rmdir(struct inode *dir, struct dentry *dentry); +static int afs_unlink(struct inode *dir, struct dentry *dentry); +static int afs_link(struct dentry *from, struct inode *dir, + struct dentry *dentry); +static int afs_symlink(struct inode *dir, struct dentry *dentry, + const char *content); +static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, + struct inode *new_dir, struct dentry *new_dentry); const struct file_operations afs_dir_file_operations = { .open = afs_dir_open, - .readdir = afs_dir_readdir, + .release = afs_release, + .readdir = afs_readdir, }; const struct inode_operations afs_dir_inode_operations = { - .lookup = afs_dir_lookup, + .create = afs_create, + .lookup = afs_lookup, + .link = afs_link, + .unlink = afs_unlink, + .symlink = afs_symlink, + .mkdir = afs_mkdir, + .rmdir = afs_rmdir, + .rename = afs_rename, + .permission = afs_permission, .getattr = afs_inode_getattr, -#if 0 /* TODO */ - .create = afs_dir_create, - .link = afs_dir_link, - .unlink = afs_dir_unlink, - .symlink = afs_dir_symlink, - .mkdir = afs_dir_mkdir, - .rmdir = afs_dir_rmdir, - .mknod = afs_dir_mknod, - .rename = afs_dir_rename, -#endif }; static struct dentry_operations afs_fs_dentry_operations = { .d_revalidate = afs_d_revalidate, .d_delete = afs_d_delete, + .d_release = afs_d_release, }; #define AFS_DIR_HASHTBL_SIZE 128 @@ -105,14 +113,13 @@ struct afs_dir_page { union afs_dir_block blocks[PAGE_SIZE / sizeof(union afs_dir_block)]; }; -struct afs_dir_lookup_cookie { +struct afs_lookup_cookie { struct afs_fid fid; const char *name; size_t nlen; int found; }; -/*****************************************************************************/ /* * check that a directory page is valid */ @@ -128,9 +135,10 @@ static inline void afs_dir_check_page(struct inode *dir, struct page *page) if (qty == 0) goto error; - if (page->index==0 && qty!=ntohs(dbuf->blocks[0].pagehdr.npages)) { + if (page->index == 0 && qty != ntohs(dbuf->blocks[0].pagehdr.npages)) { printk("kAFS: %s(%lu): wrong number of dir blocks %d!=%hu\n", - __FUNCTION__,dir->i_ino,qty,ntohs(dbuf->blocks[0].pagehdr.npages)); + __FUNCTION__, dir->i_ino, qty, + ntohs(dbuf->blocks[0].pagehdr.npages)); goto error; } #endif @@ -157,13 +165,11 @@ static inline void afs_dir_check_page(struct inode *dir, struct page *page) SetPageChecked(page); return; - error: +error: SetPageChecked(page); SetPageError(page); +} -} /* end afs_dir_check_page() */ - -/*****************************************************************************/ /* * discard a page cached in the pagecache */ @@ -171,20 +177,22 @@ static inline void afs_dir_put_page(struct page *page) { kunmap(page); page_cache_release(page); +} -} /* end afs_dir_put_page() */ - -/*****************************************************************************/ /* * get a page into the pagecache */ -static struct page *afs_dir_get_page(struct inode *dir, unsigned long index) +static struct page *afs_dir_get_page(struct inode *dir, unsigned long index, + struct key *key) { struct page *page; + struct file file = { + .private_data = key, + }; _enter("{%lu},%lu", dir->i_ino, index); - page = read_mapping_page(dir->i_mapping, index, NULL); + page = read_mapping_page(dir->i_mapping, index, &file); if (!IS_ERR(page)) { wait_on_page_locked(page); kmap(page); @@ -197,12 +205,12 @@ static struct page *afs_dir_get_page(struct inode *dir, unsigned long index) } return page; - fail: +fail: afs_dir_put_page(page); + _leave(" = -EIO"); return ERR_PTR(-EIO); -} /* end afs_dir_get_page() */ +} -/*****************************************************************************/ /* * open an AFS directory file */ @@ -213,15 +221,12 @@ static int afs_dir_open(struct inode *inode, struct file *file) BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); BUILD_BUG_ON(sizeof(union afs_dirent) != 32); - if (AFS_FS_I(inode)->flags & AFS_VNODE_DELETED) + if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(inode)->flags)) return -ENOENT; - _leave(" = 0"); - return 0; - -} /* end afs_dir_open() */ + return afs_open(inode, file); +} -/*****************************************************************************/ /* * deal with one block in an AFS directory */ @@ -250,7 +255,7 @@ static int afs_dir_iterate_block(unsigned *fpos, /* skip entries marked unused in the bitmap */ if (!(block->pagehdr.bitmap[offset / 8] & (1 << (offset % 8)))) { - _debug("ENT[%Zu.%u]: unused\n", + _debug("ENT[%Zu.%u]: unused", blkoff / sizeof(union afs_dir_block), offset); if (offset >= curr) *fpos = blkoff + @@ -264,7 +269,7 @@ static int afs_dir_iterate_block(unsigned *fpos, sizeof(*block) - offset * sizeof(union afs_dirent)); - _debug("ENT[%Zu.%u]: %s %Zu \"%s\"\n", + _debug("ENT[%Zu.%u]: %s %Zu \"%s\"", blkoff / sizeof(union afs_dir_block), offset, (offset < curr ? "skip" : "fill"), nlen, dire->u.name); @@ -274,7 +279,7 @@ static int afs_dir_iterate_block(unsigned *fpos, if (next >= AFS_DIRENT_PER_BLOCK) { _debug("ENT[%Zu.%u]:" " %u travelled beyond end dir block" - " (len %u/%Zu)\n", + " (len %u/%Zu)", blkoff / sizeof(union afs_dir_block), offset, next, tmp, nlen); return -EIO; @@ -282,13 +287,13 @@ static int afs_dir_iterate_block(unsigned *fpos, if (!(block->pagehdr.bitmap[next / 8] & (1 << (next % 8)))) { _debug("ENT[%Zu.%u]:" - " %u unmarked extension (len %u/%Zu)\n", + " %u unmarked extension (len %u/%Zu)", blkoff / sizeof(union afs_dir_block), offset, next, tmp, nlen); return -EIO; } - _debug("ENT[%Zu.%u]: ext %u/%Zu\n", + _debug("ENT[%Zu.%u]: ext %u/%Zu", blkoff / sizeof(union afs_dir_block), next, tmp, nlen); next++; @@ -304,7 +309,7 @@ static int afs_dir_iterate_block(unsigned *fpos, nlen, blkoff + offset * sizeof(union afs_dirent), ntohl(dire->u.vnode), - filldir == afs_dir_lookup_filldir ? + filldir == afs_lookup_filldir ? ntohl(dire->u.unique) : DT_UNKNOWN); if (ret < 0) { _leave(" = 0 [full]"); @@ -316,16 +321,15 @@ static int afs_dir_iterate_block(unsigned *fpos, _leave(" = 1 [more]"); return 1; -} /* end afs_dir_iterate_block() */ +} -/*****************************************************************************/ /* - * read an AFS directory + * iterate through the data blob that lists the contents of an AFS directory */ static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie, - filldir_t filldir) + filldir_t filldir, struct key *key) { - union afs_dir_block *dblock; + union afs_dir_block *dblock; struct afs_dir_page *dbuf; struct page *page; unsigned blkoff, limit; @@ -333,7 +337,7 @@ static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie, _enter("{%lu},%u,,", dir->i_ino, *fpos); - if (AFS_FS_I(dir)->flags & AFS_VNODE_DELETED) { + if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) { _leave(" = -ESTALE"); return -ESTALE; } @@ -348,7 +352,7 @@ static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie, blkoff = *fpos & ~(sizeof(union afs_dir_block) - 1); /* fetch the appropriate page from the directory */ - page = afs_dir_get_page(dir, blkoff / PAGE_SIZE); + page = afs_dir_get_page(dir, blkoff / PAGE_SIZE, key); if (IS_ERR(page)) { ret = PTR_ERR(page); break; @@ -377,43 +381,50 @@ static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie, ret = 0; } - out: +out: _leave(" = %d", ret); return ret; -} /* end afs_dir_iterate() */ +} -/*****************************************************************************/ /* * read an AFS directory */ -static int afs_dir_readdir(struct file *file, void *cookie, filldir_t filldir) +static int afs_readdir(struct file *file, void *cookie, filldir_t filldir) { unsigned fpos; int ret; - _enter("{%Ld,{%lu}}", file->f_pos, file->f_path.dentry->d_inode->i_ino); + _enter("{%Ld,{%lu}}", + file->f_pos, file->f_path.dentry->d_inode->i_ino); + + ASSERT(file->private_data != NULL); fpos = file->f_pos; - ret = afs_dir_iterate(file->f_path.dentry->d_inode, &fpos, cookie, filldir); + ret = afs_dir_iterate(file->f_path.dentry->d_inode, &fpos, + cookie, filldir, file->private_data); file->f_pos = fpos; _leave(" = %d", ret); return ret; -} /* end afs_dir_readdir() */ +} -/*****************************************************************************/ /* * search the directory for a name * - if afs_dir_iterate_block() spots this function, it'll pass the FID * uniquifier through dtype */ -static int afs_dir_lookup_filldir(void *_cookie, const char *name, int nlen, - loff_t fpos, u64 ino, unsigned dtype) +static int afs_lookup_filldir(void *_cookie, const char *name, int nlen, + loff_t fpos, u64 ino, unsigned dtype) { - struct afs_dir_lookup_cookie *cookie = _cookie; + struct afs_lookup_cookie *cookie = _cookie; - _enter("{%s,%Zu},%s,%u,,%lu,%u", - cookie->name, cookie->nlen, name, nlen, ino, dtype); + _enter("{%s,%Zu},%s,%u,,%llu,%u", + cookie->name, cookie->nlen, name, nlen, + (unsigned long long) ino, dtype); + + /* insanity checks first */ + BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); + BUILD_BUG_ON(sizeof(union afs_dirent) != 32); if (cookie->nlen != nlen || memcmp(cookie->name, name, nlen) != 0) { _leave(" = 0 [no]"); @@ -426,216 +437,254 @@ static int afs_dir_lookup_filldir(void *_cookie, const char *name, int nlen, _leave(" = -1 [found]"); return -1; -} /* end afs_dir_lookup_filldir() */ +} -/*****************************************************************************/ /* - * look up an entry in a directory + * do a lookup in a directory + * - just returns the FID the dentry name maps to if found */ -static struct dentry *afs_dir_lookup(struct inode *dir, struct dentry *dentry, - struct nameidata *nd) +static int afs_do_lookup(struct inode *dir, struct dentry *dentry, + struct afs_fid *fid, struct key *key) { - struct afs_dir_lookup_cookie cookie; + struct afs_lookup_cookie cookie; struct afs_super_info *as; + unsigned fpos; + int ret; + + _enter("{%lu},%p{%s},", dir->i_ino, dentry, dentry->d_name.name); + + as = dir->i_sb->s_fs_info; + + /* search the directory */ + cookie.name = dentry->d_name.name; + cookie.nlen = dentry->d_name.len; + cookie.fid.vid = as->volume->vid; + cookie.found = 0; + + fpos = 0; + ret = afs_dir_iterate(dir, &fpos, &cookie, afs_lookup_filldir, + key); + if (ret < 0) { + _leave(" = %d [iter]", ret); + return ret; + } + + ret = -ENOENT; + if (!cookie.found) { + _leave(" = -ENOENT [not found]"); + return -ENOENT; + } + + *fid = cookie.fid; + _leave(" = 0 { vn=%u u=%u }", fid->vnode, fid->unique); + return 0; +} + +/* + * look up an entry in a directory + */ +static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, + struct nameidata *nd) +{ struct afs_vnode *vnode; + struct afs_fid fid; struct inode *inode; - unsigned fpos; + struct key *key; int ret; - _enter("{%lu},%p{%s}", dir->i_ino, dentry, dentry->d_name.name); + vnode = AFS_FS_I(dir); - /* insanity checks first */ - BUILD_BUG_ON(sizeof(union afs_dir_block) != 2048); - BUILD_BUG_ON(sizeof(union afs_dirent) != 32); + _enter("{%x:%d},%p{%s},", + vnode->fid.vid, vnode->fid.vnode, dentry, dentry->d_name.name); + + ASSERTCMP(dentry->d_inode, ==, NULL); if (dentry->d_name.len > 255) { _leave(" = -ENAMETOOLONG"); return ERR_PTR(-ENAMETOOLONG); } - vnode = AFS_FS_I(dir); - if (vnode->flags & AFS_VNODE_DELETED) { + if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) { _leave(" = -ESTALE"); return ERR_PTR(-ESTALE); } - as = dir->i_sb->s_fs_info; - - /* search the directory */ - cookie.name = dentry->d_name.name; - cookie.nlen = dentry->d_name.len; - cookie.fid.vid = as->volume->vid; - cookie.found = 0; + key = afs_request_key(vnode->volume->cell); + if (IS_ERR(key)) { + _leave(" = %ld [key]", PTR_ERR(key)); + return ERR_PTR(PTR_ERR(key)); + } - fpos = 0; - ret = afs_dir_iterate(dir, &fpos, &cookie, afs_dir_lookup_filldir); + ret = afs_validate(vnode, key); if (ret < 0) { - _leave(" = %d", ret); + key_put(key); + _leave(" = %d [val]", ret); return ERR_PTR(ret); } - ret = -ENOENT; - if (!cookie.found) { - _leave(" = %d", ret); + ret = afs_do_lookup(dir, dentry, &fid, key); + if (ret < 0) { + key_put(key); + if (ret == -ENOENT) { + d_add(dentry, NULL); + _leave(" = NULL [negative]"); + return NULL; + } + _leave(" = %d [do]", ret); return ERR_PTR(ret); } + dentry->d_fsdata = (void *)(unsigned long) vnode->status.data_version; /* instantiate the dentry */ - ret = afs_iget(dir->i_sb, &cookie.fid, &inode); - if (ret < 0) { - _leave(" = %d", ret); - return ERR_PTR(ret); + inode = afs_iget(dir->i_sb, key, &fid, NULL, NULL); + key_put(key); + if (IS_ERR(inode)) { + _leave(" = %ld", PTR_ERR(inode)); + return ERR_PTR(PTR_ERR(inode)); } dentry->d_op = &afs_fs_dentry_operations; - dentry->d_fsdata = (void *) (unsigned long) vnode->status.version; d_add(dentry, inode); _leave(" = 0 { vn=%u u=%u } -> { ino=%lu v=%lu }", - cookie.fid.vnode, - cookie.fid.unique, + fid.vnode, + fid.unique, dentry->d_inode->i_ino, dentry->d_inode->i_version); return NULL; -} /* end afs_dir_lookup() */ +} -/*****************************************************************************/ /* * check that a dentry lookup hit has found a valid entry * - NOTE! the hit can be a negative hit too, so we can't assume we have an * inode - * (derived from nfs_lookup_revalidate) */ static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd) { - struct afs_dir_lookup_cookie cookie; + struct afs_vnode *vnode, *dir; + struct afs_fid fid; struct dentry *parent; - struct inode *inode, *dir; - unsigned fpos; + struct key *key; + void *dir_version; int ret; - _enter("{sb=%p n=%s},", dentry->d_sb, dentry->d_name.name); + vnode = AFS_FS_I(dentry->d_inode); - /* lock down the parent dentry so we can peer at it */ - parent = dget_parent(dentry->d_parent); + if (dentry->d_inode) + _enter("{v={%x:%u} n=%s fl=%lx},", + vnode->fid.vid, vnode->fid.vnode, dentry->d_name.name, + vnode->flags); + else + _enter("{neg n=%s}", dentry->d_name.name); - dir = parent->d_inode; - inode = dentry->d_inode; + key = afs_request_key(AFS_FS_S(dentry->d_sb)->volume->cell); + if (IS_ERR(key)) + key = NULL; - /* handle a negative dentry */ - if (!inode) + /* lock down the parent dentry so we can peer at it */ + parent = dget_parent(dentry); + if (!parent->d_inode) goto out_bad; - /* handle a bad inode */ - if (is_bad_inode(inode)) { - printk("kAFS: afs_d_revalidate: %s/%s has bad inode\n", - dentry->d_parent->d_name.name, dentry->d_name.name); - goto out_bad; - } + dir = AFS_FS_I(parent->d_inode); - /* force a full look up if the parent directory changed since last the - * server was consulted - * - otherwise this inode must still exist, even if the inode details - * themselves have changed - */ - if (AFS_FS_I(dir)->flags & AFS_VNODE_CHANGED) - afs_vnode_fetch_status(AFS_FS_I(dir)); + /* validate the parent directory */ + if (test_bit(AFS_VNODE_MODIFIED, &dir->flags)) + afs_validate(dir, key); - if (AFS_FS_I(dir)->flags & AFS_VNODE_DELETED) { + if (test_bit(AFS_VNODE_DELETED, &dir->flags)) { _debug("%s: parent dir deleted", dentry->d_name.name); goto out_bad; } - if (AFS_FS_I(inode)->flags & AFS_VNODE_DELETED) { - _debug("%s: file already deleted", dentry->d_name.name); - goto out_bad; - } - - if ((unsigned long) dentry->d_fsdata != - (unsigned long) AFS_FS_I(dir)->status.version) { - _debug("%s: parent changed %lu -> %u", - dentry->d_name.name, - (unsigned long) dentry->d_fsdata, - (unsigned) AFS_FS_I(dir)->status.version); + dir_version = (void *) (unsigned long) dir->status.data_version; + if (dentry->d_fsdata == dir_version) + goto out_valid; /* the dir contents are unchanged */ - /* search the directory for this vnode */ - cookie.name = dentry->d_name.name; - cookie.nlen = dentry->d_name.len; - cookie.fid.vid = AFS_FS_I(inode)->volume->vid; - cookie.found = 0; + _debug("dir modified"); - fpos = 0; - ret = afs_dir_iterate(dir, &fpos, &cookie, - afs_dir_lookup_filldir); - if (ret < 0) { - _debug("failed to iterate dir %s: %d", - parent->d_name.name, ret); + /* search the directory for this vnode */ + ret = afs_do_lookup(&dir->vfs_inode, dentry, &fid, key); + switch (ret) { + case 0: + /* the filename maps to something */ + if (!dentry->d_inode) + goto out_bad; + if (is_bad_inode(dentry->d_inode)) { + printk("kAFS: afs_d_revalidate: %s/%s has bad inode\n", + parent->d_name.name, dentry->d_name.name); goto out_bad; - } - - if (!cookie.found) { - _debug("%s: dirent not found", dentry->d_name.name); - goto not_found; } /* if the vnode ID has changed, then the dirent points to a * different file */ - if (cookie.fid.vnode != AFS_FS_I(inode)->fid.vnode) { - _debug("%s: dirent changed", dentry->d_name.name); + if (fid.vnode != vnode->fid.vnode) { + _debug("%s: dirent changed [%u != %u]", + dentry->d_name.name, fid.vnode, + vnode->fid.vnode); goto not_found; } /* if the vnode ID uniqifier has changed, then the file has - * been deleted */ - if (cookie.fid.unique != AFS_FS_I(inode)->fid.unique) { + * been deleted and replaced, and the original vnode ID has + * been reused */ + if (fid.unique != vnode->fid.unique) { _debug("%s: file deleted (uq %u -> %u I:%lu)", - dentry->d_name.name, - cookie.fid.unique, - AFS_FS_I(inode)->fid.unique, - inode->i_version); - spin_lock(&AFS_FS_I(inode)->lock); - AFS_FS_I(inode)->flags |= AFS_VNODE_DELETED; - spin_unlock(&AFS_FS_I(inode)->lock); - invalidate_remote_inode(inode); - goto out_bad; + dentry->d_name.name, fid.unique, + vnode->fid.unique, dentry->d_inode->i_version); + spin_lock(&vnode->lock); + set_bit(AFS_VNODE_DELETED, &vnode->flags); + spin_unlock(&vnode->lock); + goto not_found; } + goto out_valid; + + case -ENOENT: + /* the filename is unknown */ + _debug("%s: dirent not found", dentry->d_name.name); + if (dentry->d_inode) + goto not_found; + goto out_valid; - dentry->d_fsdata = - (void *) (unsigned long) AFS_FS_I(dir)->status.version; + default: + _debug("failed to iterate dir %s: %d", + parent->d_name.name, ret); + goto out_bad; } - out_valid: +out_valid: + dentry->d_fsdata = dir_version; +out_skip: dput(parent); + key_put(key); _leave(" = 1 [valid]"); return 1; /* the dirent, if it exists, now points to a different vnode */ - not_found: +not_found: spin_lock(&dentry->d_lock); dentry->d_flags |= DCACHE_NFSFS_RENAMED; spin_unlock(&dentry->d_lock); - out_bad: - if (inode) { +out_bad: + if (dentry->d_inode) { /* don't unhash if we have submounts */ if (have_submounts(dentry)) - goto out_valid; + goto out_skip; } - shrink_dcache_parent(dentry); - _debug("dropping dentry %s/%s", - dentry->d_parent->d_name.name, dentry->d_name.name); + parent->d_name.name, dentry->d_name.name); + shrink_dcache_parent(dentry); d_drop(dentry); - dput(parent); + key_put(key); _leave(" = 0 [bad]"); return 0; -} /* end afs_d_revalidate() */ +} -/*****************************************************************************/ /* * allow the VFS to enquire as to whether a dentry should be unhashed (mustn't * sleep) @@ -649,15 +698,444 @@ static int afs_d_delete(struct dentry *dentry) if (dentry->d_flags & DCACHE_NFSFS_RENAMED) goto zap; - if (dentry->d_inode) { - if (AFS_FS_I(dentry->d_inode)->flags & AFS_VNODE_DELETED) + if (dentry->d_inode && + test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dentry->d_inode)->flags)) goto zap; - } _leave(" = 0 [keep]"); return 0; - zap: +zap: _leave(" = 1 [zap]"); return 1; -} /* end afs_d_delete() */ +} + +/* + * handle dentry release + */ +static void afs_d_release(struct dentry *dentry) +{ + _enter("%s", dentry->d_name.name); +} + +/* + * create a directory on an AFS filesystem + */ +static int afs_mkdir(struct inode *dir, struct dentry *dentry, int mode) +{ + struct afs_file_status status; + struct afs_callback cb; + struct afs_server *server; + struct afs_vnode *dvnode, *vnode; + struct afs_fid fid; + struct inode *inode; + struct key *key; + int ret; + + dvnode = AFS_FS_I(dir); + + _enter("{%x:%d},{%s},%o", + dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name, mode); + + ret = -ENAMETOOLONG; + if (dentry->d_name.len > 255) + goto error; + + key = afs_request_key(dvnode->volume->cell); + if (IS_ERR(key)) { + ret = PTR_ERR(key); + goto error; + } + + mode |= S_IFDIR; + ret = afs_vnode_create(dvnode, key, dentry->d_name.name, + mode, &fid, &status, &cb, &server); + if (ret < 0) + goto mkdir_error; + + inode = afs_iget(dir->i_sb, key, &fid, &status, &cb); + if (IS_ERR(inode)) { + /* ENOMEM at a really inconvenient time - just abandon the new + * directory on the server */ + ret = PTR_ERR(inode); + goto iget_error; + } + + /* apply the status report we've got for the new vnode */ + vnode = AFS_FS_I(inode); + spin_lock(&vnode->lock); + vnode->update_cnt++; + spin_unlock(&vnode->lock); + afs_vnode_finalise_status_update(vnode, server); + afs_put_server(server); + + d_instantiate(dentry, inode); + if (d_unhashed(dentry)) { + _debug("not hashed"); + d_rehash(dentry); + } + key_put(key); + _leave(" = 0"); + return 0; + +iget_error: + afs_put_server(server); +mkdir_error: + key_put(key); +error: + d_drop(dentry); + _leave(" = %d", ret); + return ret; +} + +/* + * remove a directory from an AFS filesystem + */ +static int afs_rmdir(struct inode *dir, struct dentry *dentry) +{ + struct afs_vnode *dvnode, *vnode; + struct key *key; + int ret; + + dvnode = AFS_FS_I(dir); + + _enter("{%x:%d},{%s}", + dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name); + + ret = -ENAMETOOLONG; + if (dentry->d_name.len > 255) + goto error; + + key = afs_request_key(dvnode->volume->cell); + if (IS_ERR(key)) { + ret = PTR_ERR(key); + goto error; + } + + ret = afs_vnode_remove(dvnode, key, dentry->d_name.name, true); + if (ret < 0) + goto rmdir_error; + + if (dentry->d_inode) { + vnode = AFS_FS_I(dentry->d_inode); + clear_nlink(&vnode->vfs_inode); + set_bit(AFS_VNODE_DELETED, &vnode->flags); + afs_discard_callback_on_delete(vnode); + } + + key_put(key); + _leave(" = 0"); + return 0; + +rmdir_error: + key_put(key); +error: + _leave(" = %d", ret); + return ret; +} + +/* + * remove a file from an AFS filesystem + */ +static int afs_unlink(struct inode *dir, struct dentry *dentry) +{ + struct afs_vnode *dvnode, *vnode; + struct key *key; + int ret; + + dvnode = AFS_FS_I(dir); + + _enter("{%x:%d},{%s}", + dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name); + + ret = -ENAMETOOLONG; + if (dentry->d_name.len > 255) + goto error; + + key = afs_request_key(dvnode->volume->cell); + if (IS_ERR(key)) { + ret = PTR_ERR(key); + goto error; + } + + if (dentry->d_inode) { + vnode = AFS_FS_I(dentry->d_inode); + + /* make sure we have a callback promise on the victim */ + ret = afs_validate(vnode, key); + if (ret < 0) + goto error; + } + + ret = afs_vnode_remove(dvnode, key, dentry->d_name.name, false); + if (ret < 0) + goto remove_error; + + if (dentry->d_inode) { + /* if the file wasn't deleted due to excess hard links, the + * fileserver will break the callback promise on the file - if + * it had one - before it returns to us, and if it was deleted, + * it won't + * + * however, if we didn't have a callback promise outstanding, + * or it was outstanding on a different server, then it won't + * break it either... + */ + vnode = AFS_FS_I(dentry->d_inode); + if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) + _debug("AFS_VNODE_DELETED"); + if (test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) + _debug("AFS_VNODE_CB_BROKEN"); + set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags); + ret = afs_validate(vnode, key); + _debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, ret); + } + + key_put(key); + _leave(" = 0"); + return 0; + +remove_error: + key_put(key); +error: + _leave(" = %d", ret); + return ret; +} + +/* + * create a regular file on an AFS filesystem + */ +static int afs_create(struct inode *dir, struct dentry *dentry, int mode, + struct nameidata *nd) +{ + struct afs_file_status status; + struct afs_callback cb; + struct afs_server *server; + struct afs_vnode *dvnode, *vnode; + struct afs_fid fid; + struct inode *inode; + struct key *key; + int ret; + + dvnode = AFS_FS_I(dir); + + _enter("{%x:%d},{%s},%o,", + dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name, mode); + + ret = -ENAMETOOLONG; + if (dentry->d_name.len > 255) + goto error; + + key = afs_request_key(dvnode->volume->cell); + if (IS_ERR(key)) { + ret = PTR_ERR(key); + goto error; + } + + mode |= S_IFREG; + ret = afs_vnode_create(dvnode, key, dentry->d_name.name, + mode, &fid, &status, &cb, &server); + if (ret < 0) + goto create_error; + + inode = afs_iget(dir->i_sb, key, &fid, &status, &cb); + if (IS_ERR(inode)) { + /* ENOMEM at a really inconvenient time - just abandon the new + * directory on the server */ + ret = PTR_ERR(inode); + goto iget_error; + } + + /* apply the status report we've got for the new vnode */ + vnode = AFS_FS_I(inode); + spin_lock(&vnode->lock); + vnode->update_cnt++; + spin_unlock(&vnode->lock); + afs_vnode_finalise_status_update(vnode, server); + afs_put_server(server); + + d_instantiate(dentry, inode); + if (d_unhashed(dentry)) { + _debug("not hashed"); + d_rehash(dentry); + } + key_put(key); + _leave(" = 0"); + return 0; + +iget_error: + afs_put_server(server); +create_error: + key_put(key); +error: + d_drop(dentry); + _leave(" = %d", ret); + return ret; +} + +/* + * create a hard link between files in an AFS filesystem + */ +static int afs_link(struct dentry *from, struct inode *dir, + struct dentry *dentry) +{ + struct afs_vnode *dvnode, *vnode; + struct key *key; + int ret; + + vnode = AFS_FS_I(from->d_inode); + dvnode = AFS_FS_I(dir); + + _enter("{%x:%d},{%x:%d},{%s}", + vnode->fid.vid, vnode->fid.vnode, + dvnode->fid.vid, dvnode->fid.vnode, + dentry->d_name.name); + + ret = -ENAMETOOLONG; + if (dentry->d_name.len > 255) + goto error; + + key = afs_request_key(dvnode->volume->cell); + if (IS_ERR(key)) { + ret = PTR_ERR(key); + goto error; + } + + ret = afs_vnode_link(dvnode, vnode, key, dentry->d_name.name); + if (ret < 0) + goto link_error; + + atomic_inc(&vnode->vfs_inode.i_count); + d_instantiate(dentry, &vnode->vfs_inode); + key_put(key); + _leave(" = 0"); + return 0; + +link_error: + key_put(key); +error: + d_drop(dentry); + _leave(" = %d", ret); + return ret; +} + +/* + * create a symlink in an AFS filesystem + */ +static int afs_symlink(struct inode *dir, struct dentry *dentry, + const char *content) +{ + struct afs_file_status status; + struct afs_server *server; + struct afs_vnode *dvnode, *vnode; + struct afs_fid fid; + struct inode *inode; + struct key *key; + int ret; + + dvnode = AFS_FS_I(dir); + + _enter("{%x:%d},{%s},%s", + dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name, + content); + + ret = -ENAMETOOLONG; + if (dentry->d_name.len > 255) + goto error; + + ret = -EINVAL; + if (strlen(content) > 1023) + goto error; + + key = afs_request_key(dvnode->volume->cell); + if (IS_ERR(key)) { + ret = PTR_ERR(key); + goto error; + } + + ret = afs_vnode_symlink(dvnode, key, dentry->d_name.name, content, + &fid, &status, &server); + if (ret < 0) + goto create_error; + + inode = afs_iget(dir->i_sb, key, &fid, &status, NULL); + if (IS_ERR(inode)) { + /* ENOMEM at a really inconvenient time - just abandon the new + * directory on the server */ + ret = PTR_ERR(inode); + goto iget_error; + } + + /* apply the status report we've got for the new vnode */ + vnode = AFS_FS_I(inode); + spin_lock(&vnode->lock); + vnode->update_cnt++; + spin_unlock(&vnode->lock); + afs_vnode_finalise_status_update(vnode, server); + afs_put_server(server); + + d_instantiate(dentry, inode); + if (d_unhashed(dentry)) { + _debug("not hashed"); + d_rehash(dentry); + } + key_put(key); + _leave(" = 0"); + return 0; + +iget_error: + afs_put_server(server); +create_error: + key_put(key); +error: + d_drop(dentry); + _leave(" = %d", ret); + return ret; +} + +/* + * rename a file in an AFS filesystem and/or move it between directories + */ +static int afs_rename(struct inode *old_dir, struct dentry *old_dentry, + struct inode *new_dir, struct dentry *new_dentry) +{ + struct afs_vnode *orig_dvnode, *new_dvnode, *vnode; + struct key *key; + int ret; + + vnode = AFS_FS_I(old_dentry->d_inode); + orig_dvnode = AFS_FS_I(old_dir); + new_dvnode = AFS_FS_I(new_dir); + + _enter("{%x:%d},{%x:%d},{%x:%d},{%s}", + orig_dvnode->fid.vid, orig_dvnode->fid.vnode, + vnode->fid.vid, vnode->fid.vnode, + new_dvnode->fid.vid, new_dvnode->fid.vnode, + new_dentry->d_name.name); + + ret = -ENAMETOOLONG; + if (new_dentry->d_name.len > 255) + goto error; + + key = afs_request_key(orig_dvnode->volume->cell); + if (IS_ERR(key)) { + ret = PTR_ERR(key); + goto error; + } + + ret = afs_vnode_rename(orig_dvnode, new_dvnode, key, + old_dentry->d_name.name, + new_dentry->d_name.name); + if (ret < 0) + goto rename_error; + key_put(key); + _leave(" = 0"); + return 0; + +rename_error: + key_put(key); +error: + d_drop(new_dentry); + _leave(" = %d", ret); + return ret; +} diff --git a/fs/afs/errors.h b/fs/afs/errors.h deleted file mode 100644 index 574d94a..0000000 --- a/fs/afs/errors.h +++ /dev/null @@ -1,34 +0,0 @@ -/* errors.h: AFS abort/error codes - * - * Copyright (C) 2002 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. - */ - -#ifndef _LINUX_AFS_ERRORS_H -#define _LINUX_AFS_ERRORS_H - -#include "types.h" - -/* file server abort codes */ -typedef enum { - VSALVAGE = 101, /* volume needs salvaging */ - VNOVNODE = 102, /* no such file/dir (vnode) */ - VNOVOL = 103, /* no such volume or volume unavailable */ - VVOLEXISTS = 104, /* volume name already exists */ - VNOSERVICE = 105, /* volume not currently in service */ - VOFFLINE = 106, /* volume is currently offline (more info available [VVL-spec]) */ - VONLINE = 107, /* volume is already online */ - VDISKFULL = 108, /* disk partition is full */ - VOVERQUOTA = 109, /* volume's maximum quota exceeded */ - VBUSY = 110, /* volume is temporarily unavailable */ - VMOVED = 111, /* volume moved to new server - ask this FS where */ -} afs_rxfs_abort_t; - -extern int afs_abort_to_error(int abortcode); - -#endif /* _LINUX_AFS_ERRORS_H */ diff --git a/fs/afs/file.c b/fs/afs/file.c index b176345..ae25649 100644 --- a/fs/afs/file.c +++ b/fs/afs/file.c @@ -1,6 +1,6 @@ -/* file.c: AFS filesystem file handling +/* AFS filesystem file handling * - * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. + * Copyright (C) 2002, 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 @@ -15,22 +15,25 @@ #include <linux/slab.h> #include <linux/fs.h> #include <linux/pagemap.h> -#include "volume.h" -#include "vnode.h" -#include <rxrpc/call.h> #include "internal.h" -#if 0 -static int afs_file_open(struct inode *inode, struct file *file); -static int afs_file_release(struct inode *inode, struct file *file); -#endif - static int afs_file_readpage(struct file *file, struct page *page); static void afs_file_invalidatepage(struct page *page, unsigned long offset); static int afs_file_releasepage(struct page *page, gfp_t gfp_flags); +const struct file_operations afs_file_operations = { + .open = afs_open, + .release = afs_release, + .llseek = generic_file_llseek, + .read = do_sync_read, + .aio_read = generic_file_aio_read, + .mmap = generic_file_readonly_mmap, + .sendfile = generic_file_sendfile, +}; + const struct inode_operations afs_file_inode_operations = { .getattr = afs_inode_getattr, + .permission = afs_permission, }; const struct address_space_operations afs_fs_aops = { @@ -40,7 +43,48 @@ const struct address_space_operations afs_fs_aops = { .invalidatepage = afs_file_invalidatepage, }; -/*****************************************************************************/ +/* + * open an AFS file or directory and attach a key to it + */ +int afs_open(struct inode *inode, struct file *file) +{ + struct afs_vnode *vnode = AFS_FS_I(inode); + struct key *key; + int ret; + + _enter("{%x:%x},", vnode->fid.vid, vnode->fid.vnode); + + key = afs_request_key(vnode->volume->cell); + if (IS_ERR(key)) { + _leave(" = %ld [key]", PTR_ERR(key)); + return PTR_ERR(key); + } + + ret = afs_validate(vnode, key); + if (ret < 0) { + _leave(" = %d [val]", ret); + return ret; + } + + file->private_data = key; + _leave(" = 0"); + return 0; +} + +/* + * release an AFS file or directory and discard its key + */ +int afs_release(struct inode *inode, struct file *file) +{ + struct afs_vnode *vnode = AFS_FS_I(inode); + + _enter("{%x:%x},", vnode->fid.vid, vnode->fid.vnode); + + key_put(file->private_data); + _leave(" = 0"); + return 0; +} + /* * deal with notification that a page was read from the cache */ @@ -58,10 +102,9 @@ static void afs_file_readpage_read_complete(void *cookie_data, SetPageUptodate(page); unlock_page(page); -} /* end afs_file_readpage_read_complete() */ +} #endif -/*****************************************************************************/ /* * deal with notification that a page was written to the cache */ @@ -74,41 +117,38 @@ static void afs_file_readpage_write_complete(void *cookie_data, _enter("%p,%p,%p,%d", cookie_data, page, data, error); unlock_page(page); - -} /* end afs_file_readpage_write_complete() */ +} #endif -/*****************************************************************************/ /* * AFS read page from file (or symlink) */ static int afs_file_readpage(struct file *file, struct page *page) { - struct afs_rxfs_fetch_descriptor desc; -#ifdef AFS_CACHING_SUPPORT - struct cachefs_page *pageio; -#endif struct afs_vnode *vnode; struct inode *inode; + struct key *key; + size_t len; + off_t offset; int ret; inode = page->mapping->host; - _enter("{%lu},{%lu}", inode->i_ino, page->index); + ASSERT(file != NULL); + key = file->private_data; + ASSERT(key != NULL); + + _enter("{%x},{%lu},{%lu}", key_serial(key), inode->i_ino, page->index); vnode = AFS_FS_I(inode); BUG_ON(!PageLocked(page)); ret = -ESTALE; - if (vnode->flags & AFS_VNODE_DELETED) + if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) goto error; #ifdef AFS_CACHING_SUPPORT - ret = cachefs_page_get_private(page, &pageio, GFP_NOIO); - if (ret < 0) - goto error; - /* is it cached? */ ret = cachefs_read_or_alloc_page(vnode->cache, page, @@ -132,26 +172,19 @@ static int afs_file_readpage(struct file *file, struct page *page) case -ENOBUFS: case -ENODATA: default: - desc.fid = vnode->fid; - desc.offset = page->index << PAGE_CACHE_SHIFT; - desc.size = min((size_t) (inode->i_size - desc.offset), - (size_t) PAGE_SIZE); - desc.buffer = kmap(page); - - clear_page(desc.buffer); + offset = page->index << PAGE_CACHE_SHIFT; + len = min_t(size_t, i_size_read(inode) - offset, PAGE_SIZE); /* read the contents of the file from the server into the * page */ - ret = afs_vnode_fetch_data(vnode, &desc); - kunmap(page); + ret = afs_vnode_fetch_data(vnode, key, offset, len, page); if (ret < 0) { - if (ret==-ENOENT) { + if (ret == -ENOENT) { _debug("got NOENT from server" " - marking file deleted and stale"); - vnode->flags |= AFS_VNODE_DELETED; + set_bit(AFS_VNODE_DELETED, &vnode->flags); ret = -ESTALE; } - #ifdef AFS_CACHING_SUPPORT cachefs_uncache_page(vnode->cache, page); #endif @@ -178,16 +211,13 @@ static int afs_file_readpage(struct file *file, struct page *page) _leave(" = 0"); return 0; - error: +error: SetPageError(page); unlock_page(page); - _leave(" = %d", ret); return ret; +} -} /* end afs_file_readpage() */ - -/*****************************************************************************/ /* * get a page cookie for the specified page */ @@ -202,10 +232,9 @@ int afs_cache_get_page_cookie(struct page *page, _leave(" = %d", ret); return ret; -} /* end afs_cache_get_page_cookie() */ +} #endif -/*****************************************************************************/ /* * invalidate part or all of a page */ @@ -240,9 +269,8 @@ static void afs_file_invalidatepage(struct page *page, unsigned long offset) } _leave(" = %d", ret); -} /* end afs_file_invalidatepage() */ +} -/*****************************************************************************/ /* * release a page and cleanup its private data */ @@ -267,4 +295,4 @@ static int afs_file_releasepage(struct page *page, gfp_t gfp_flags) _leave(" = 0"); return 0; -} /* end afs_file_releasepage() */ +} diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c index 61bc371..2393d2a 100644 --- a/fs/afs/fsclient.c +++ b/fs/afs/fsclient.c @@ -1,6 +1,6 @@ -/* fsclient.c: AFS File Server client stubs +/* AFS File Server client stubs * - * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. + * Copyright (C) 2002, 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 @@ -11,827 +11,927 @@ #include <linux/init.h> #include <linux/sched.h> -#include <rxrpc/rxrpc.h> -#include <rxrpc/transport.h> -#include <rxrpc/connection.h> -#include <rxrpc/call.h> -#include "fsclient.h" -#include "cmservice.h" -#include "vnode.h" -#include "server.h" -#include "errors.h" +#include <linux/circ_buf.h> #include "internal.h" +#include "afs_fs.h" -#define FSFETCHSTATUS 132 /* AFS Fetch file status */ -#define FSFETCHDATA 130 /* AFS Fetch file data */ -#define FSGIVEUPCALLBACKS 147 /* AFS Discard callback promises */ -#define FSGETVOLUMEINFO 148 /* AFS Get root volume information */ -#define FSGETROOTVOLUME 151 /* AFS Get root volume name */ -#define FSLOOKUP 161 /* AFS lookup file in directory */ - -/*****************************************************************************/ /* - * map afs abort codes to/from Linux error codes - * - called with call->lock held + * decode an AFSFid block */ -static void afs_rxfs_aemap(struct rxrpc_call *call) +static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid) { - switch (call->app_err_state) { - case RXRPC_ESTATE_LOCAL_ABORT: - call->app_abort_code = -call->app_errno; - break; - case RXRPC_ESTATE_PEER_ABORT: - call->app_errno = afs_abort_to_error(call->app_abort_code); - break; - default: - break; - } -} /* end afs_rxfs_aemap() */ + const __be32 *bp = *_bp; + + fid->vid = ntohl(*bp++); + fid->vnode = ntohl(*bp++); + fid->unique = ntohl(*bp++); + *_bp = bp; +} -/*****************************************************************************/ /* - * get the root volume name from a fileserver - * - this operation doesn't seem to work correctly in OpenAFS server 1.2.2 + * decode an AFSFetchStatus block */ -#if 0 -int afs_rxfs_get_root_volume(struct afs_server *server, - char *buf, size_t *buflen) +static void xdr_decode_AFSFetchStatus(const __be32 **_bp, + struct afs_file_status *status, + struct afs_vnode *vnode) { - struct rxrpc_connection *conn; - struct rxrpc_call *call; - struct kvec piov[2]; - size_t sent; - int ret; - u32 param[1]; + const __be32 *bp = *_bp; + umode_t mode; + u64 data_version, size; + u32 changed = 0; /* becomes non-zero if ctime-type changes seen */ + +#define EXTRACT(DST) \ + do { \ + u32 x = ntohl(*bp++); \ + changed |= DST - x; \ + DST = x; \ + } while (0) + + status->if_version = ntohl(*bp++); + EXTRACT(status->type); + EXTRACT(status->nlink); + size = ntohl(*bp++); + data_version = ntohl(*bp++); + EXTRACT(status->author); + EXTRACT(status->owner); + EXTRACT(status->caller_access); /* call ticket dependent */ + EXTRACT(status->anon_access); + EXTRACT(status->mode); + EXTRACT(status->parent.vnode); + EXTRACT(status->parent.unique); + bp++; /* seg size */ + status->mtime_client = ntohl(*bp++); + status->mtime_server = ntohl(*bp++); + EXTRACT(status->group); + bp++; /* sync counter */ + data_version |= (u64) ntohl(*bp++) << 32; + bp++; /* lock count */ + size |= (u64) ntohl(*bp++) << 32; + bp++; /* spare 4 */ + *_bp = bp; + + if (size != status->size) { + status->size = size; + changed |= true; + } + status->mode &= S_IALLUGO; + + _debug("vnode time %lx, %lx", + status->mtime_client, status->mtime_server); + + if (vnode) { + status->parent.vid = vnode->fid.vid; + if (changed && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) { + _debug("vnode changed"); + i_size_write(&vnode->vfs_inode, size); + vnode->vfs_inode.i_uid = status->owner; + vnode->vfs_inode.i_gid = status->group; + vnode->vfs_inode.i_version = vnode->fid.unique; + vnode->vfs_inode.i_nlink = status->nlink; + + mode = vnode->vfs_inode.i_mode; + mode &= ~S_IALLUGO; + mode |= status->mode; + barrier(); + vnode->vfs_inode.i_mode = mode; + } - DECLARE_WAITQUEUE(myself, current); + vnode->vfs_inode.i_ctime.tv_sec = status->mtime_server; + vnode->vfs_inode.i_mtime = vnode->vfs_inode.i_ctime; + vnode->vfs_inode.i_atime = vnode->vfs_inode.i_ctime; + } - kenter("%p,%p,%u",server, buf, *buflen); + if (status->data_version != data_version) { + status->data_version = data_version; + if (vnode && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) { + _debug("vnode modified %llx on {%x:%u}", + (unsigned long long) data_version, + vnode->fid.vid, vnode->fid.vnode); + set_bit(AFS_VNODE_MODIFIED, &vnode->flags); + set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags); + } + } +} - /* get hold of the fileserver connection */ - ret = afs_server_get_fsconn(server, &conn); - if (ret < 0) - goto out; +/* + * decode an AFSCallBack block + */ +static void xdr_decode_AFSCallBack(const __be32 **_bp, struct afs_vnode *vnode) +{ + const __be32 *bp = *_bp; - /* create a call through that connection */ - ret = rxrpc_create_call(conn, NULL, NULL, afs_rxfs_aemap, &call); - if (ret < 0) { - printk("kAFS: Unable to create call: %d\n", ret); - goto out_put_conn; - } - call->app_opcode = FSGETROOTVOLUME; + vnode->cb_version = ntohl(*bp++); + vnode->cb_expiry = ntohl(*bp++); + vnode->cb_type = ntohl(*bp++); + vnode->cb_expires = vnode->cb_expiry + get_seconds(); + *_bp = bp; +} - /* we want to get event notifications from the call */ - add_wait_queue(&call->waitq, &myself); +static void xdr_decode_AFSCallBack_raw(const __be32 **_bp, + struct afs_callback *cb) +{ + const __be32 *bp = *_bp; - /* marshall the parameters */ - param[0] = htonl(FSGETROOTVOLUME); - - piov[0].iov_len = sizeof(param); - piov[0].iov_base = param; - - /* send the parameters to the server */ - ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS, - 0, &sent); - if (ret < 0) - goto abort; - - /* wait for the reply to completely arrive */ - for (;;) { - set_current_state(TASK_INTERRUPTIBLE); - if (call->app_call_state != RXRPC_CSTATE_CLNT_RCV_REPLY || - signal_pending(current)) - break; - schedule(); - } - set_current_state(TASK_RUNNING); + cb->version = ntohl(*bp++); + cb->expiry = ntohl(*bp++); + cb->type = ntohl(*bp++); + *_bp = bp; +} - ret = -EINTR; - if (signal_pending(current)) - goto abort; +/* + * decode an AFSVolSync block + */ +static void xdr_decode_AFSVolSync(const __be32 **_bp, + struct afs_volsync *volsync) +{ + const __be32 *bp = *_bp; - switch (call->app_call_state) { - case RXRPC_CSTATE_ERROR: - ret = call->app_errno; - kdebug("Got Error: %d", ret); - goto out_unwait; + volsync->creation = ntohl(*bp++); + bp++; /* spare2 */ + bp++; /* spare3 */ + bp++; /* spare4 */ + bp++; /* spare5 */ + bp++; /* spare6 */ + *_bp = bp; +} - case RXRPC_CSTATE_CLNT_GOT_REPLY: - /* read the reply */ - kdebug("Got Reply: qty=%d", call->app_ready_qty); +/* + * deliver reply data to an FS.FetchStatus + */ +static int afs_deliver_fs_fetch_status(struct afs_call *call, + struct sk_buff *skb, bool last) +{ + struct afs_vnode *vnode = call->reply; + const __be32 *bp; - ret = -EBADMSG; - if (call->app_ready_qty <= 4) - goto abort; + _enter(",,%u", last); - ret = rxrpc_call_read_data(call, NULL, call->app_ready_qty, 0); - if (ret < 0) - goto abort; + afs_transfer_reply(call, skb); + if (!last) + return 0; -#if 0 - /* unmarshall the reply */ - bp = buffer; - for (loop = 0; loop < 65; loop++) - entry->name[loop] = ntohl(*bp++); - entry->name[64] = 0; + if (call->reply_size != call->reply_max) + return -EBADMSG; - entry->type = ntohl(*bp++); - entry->num_servers = ntohl(*bp++); + /* unmarshall the reply once we've received all of it */ + bp = call->buffer; + xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode); + xdr_decode_AFSCallBack(&bp, vnode); + if (call->reply2) + xdr_decode_AFSVolSync(&bp, call->reply2); - for (loop = 0; loop < 8; loop++) - entry->servers[loop].addr.s_addr = *bp++; + _leave(" = 0 [done]"); + return 0; +} - for (loop = 0; loop < 8; loop++) - entry->servers[loop].partition = ntohl(*bp++); +/* + * FS.FetchStatus operation type + */ +static const struct afs_call_type afs_RXFSFetchStatus = { + .name = "FS.FetchStatus", + .deliver = afs_deliver_fs_fetch_status, + .abort_to_error = afs_abort_to_error, + .destructor = afs_flat_call_destructor, +}; - for (loop = 0; loop < 8; loop++) - entry->servers[loop].flags = ntohl(*bp++); +/* + * fetch the status information for a file + */ +int afs_fs_fetch_file_status(struct afs_server *server, + struct key *key, + struct afs_vnode *vnode, + struct afs_volsync *volsync, + const struct afs_wait_mode *wait_mode) +{ + struct afs_call *call; + __be32 *bp; - for (loop = 0; loop < 3; loop++) - entry->volume_ids[loop] = ntohl(*bp++); + _enter(",%x,{%x:%d},,", + key_serial(key), vnode->fid.vid, vnode->fid.vnode); - entry->clone_id = ntohl(*bp++); - entry->flags = ntohl(*bp); -#endif + call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4); + if (!call) + return -ENOMEM; - /* success */ - ret = 0; - goto out_unwait; + call->key = key; + call->reply = vnode; + call->reply2 = volsync; + call->service_id = FS_SERVICE; + call->port = htons(AFS_FS_PORT); - default: - BUG(); - } + /* marshall the parameters */ + bp = call->request; + bp[0] = htonl(FSFETCHSTATUS); + bp[1] = htonl(vnode->fid.vid); + bp[2] = htonl(vnode->fid.vnode); + bp[3] = htonl(vnode->fid.unique); + + return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); +} - abort: - set_current_state(TASK_UNINTERRUPTIBLE); - rxrpc_call_abort(call, ret); - schedule(); - out_unwait: - set_current_state(TASK_RUNNING); - remove_wait_queue(&call->waitq, &myself); - rxrpc_put_call(call); - out_put_conn: - afs_server_release_fsconn(server, conn); - out: - kleave(""); - return ret; -} /* end afs_rxfs_get_root_volume() */ -#endif - -/*****************************************************************************/ /* - * get information about a volume + * deliver reply data to an FS.FetchData */ -#if 0 -int afs_rxfs_get_volume_info(struct afs_server *server, - const char *name, - struct afs_volume_info *vinfo) +static int afs_deliver_fs_fetch_data(struct afs_call *call, + struct sk_buff *skb, bool last) { - struct rxrpc_connection *conn; - struct rxrpc_call *call; - struct kvec piov[3]; - size_t sent; + struct afs_vnode *vnode = call->reply; + const __be32 *bp; + struct page *page; + void *buffer; int ret; - u32 param[2], *bp, zero; - DECLARE_WAITQUEUE(myself, current); + _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); + + switch (call->unmarshall) { + case 0: + call->offset = 0; + call->unmarshall++; + + /* extract the returned data length */ + case 1: + _debug("extract data length"); + ret = afs_extract_data(call, skb, last, &call->tmp, 4); + switch (ret) { + case 0: break; + case -EAGAIN: return 0; + default: return ret; + } - _enter("%p,%s,%p", server, name, vinfo); + call->count = ntohl(call->tmp); + _debug("DATA length: %u", call->count); + if (call->count > PAGE_SIZE) + return -EBADMSG; + call->offset = 0; + call->unmarshall++; + + if (call->count < PAGE_SIZE) { + buffer = kmap_atomic(call->reply3, KM_USER0); + memset(buffer + PAGE_SIZE - call->count, 0, + call->count); + kunmap_atomic(buffer, KM_USER0); + } - /* get hold of the fileserver connection */ - ret = afs_server_get_fsconn(server, &conn); - if (ret < 0) - goto out; + /* extract the returned data */ + case 2: + _debug("extract data"); + page = call->reply3; + buffer = kmap_atomic(page, KM_USER0); + ret = afs_extract_data(call, skb, last, buffer, call->count); + kunmap_atomic(buffer, KM_USER0); + switch (ret) { + case 0: break; + case -EAGAIN: return 0; + default: return ret; + } - /* create a call through that connection */ - ret = rxrpc_create_call(conn, NULL, NULL, afs_rxfs_aemap, &call); - if (ret < 0) { - printk("kAFS: Unable to create call: %d\n", ret); - goto out_put_conn; - } - call->app_opcode = FSGETVOLUMEINFO; + call->offset = 0; + call->unmarshall++; + + /* extract the metadata */ + case 3: + ret = afs_extract_data(call, skb, last, call->buffer, + (21 + 3 + 6) * 4); + switch (ret) { + case 0: break; + case -EAGAIN: return 0; + default: return ret; + } - /* we want to get event notifications from the call */ - add_wait_queue(&call->waitq, &myself); + bp = call->buffer; + xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode); + xdr_decode_AFSCallBack(&bp, vnode); + if (call->reply2) + xdr_decode_AFSVolSync(&bp, call->reply2); - /* marshall the parameters */ - piov[1].iov_len = strlen(name); - piov[1].iov_base = (char *) name; - - zero = 0; - piov[2].iov_len = (4 - (piov[1].iov_len & 3)) & 3; - piov[2].iov_base = &zero; - - param[0] = htonl(FSGETVOLUMEINFO); - param[1] = htonl(piov[1].iov_len); - - piov[0].iov_len = sizeof(param); - piov[0].iov_base = param; - - /* send the parameters to the server */ - ret = rxrpc_call_write_data(call, 3, piov, RXRPC_LAST_PACKET, GFP_NOFS, - 0, &sent); - if (ret < 0) - goto abort; - - /* wait for the reply to completely arrive */ - bp = rxrpc_call_alloc_scratch(call, 64); - - ret = rxrpc_call_read_data(call, bp, 64, - RXRPC_CALL_READ_BLOCK | - RXRPC_CALL_READ_ALL); - if (ret < 0) { - if (ret == -ECONNABORTED) { - ret = call->app_errno; - goto out_unwait; - } - goto abort; + call->offset = 0; + call->unmarshall++; + + case 4: + _debug("trailer"); + if (skb->len != 0) + return -EBADMSG; + break; } - /* unmarshall the reply */ - vinfo->vid = ntohl(*bp++); - vinfo->type = ntohl(*bp++); - - vinfo->type_vids[0] = ntohl(*bp++); - vinfo->type_vids[1] = ntohl(*bp++); - vinfo->type_vids[2] = ntohl(*bp++); - vinfo->type_vids[3] = ntohl(*bp++); - vinfo->type_vids[4] = ntohl(*bp++); - - vinfo->nservers = ntohl(*bp++); - vinfo->servers[0].addr.s_addr = *bp++; - vinfo->servers[1].addr.s_addr = *bp++; - vinfo->servers[2].addr.s_addr = *bp++; - vinfo->servers[3].addr.s_addr = *bp++; - vinfo->servers[4].addr.s_addr = *bp++; - vinfo->servers[5].addr.s_addr = *bp++; - vinfo->servers[6].addr.s_addr = *bp++; - vinfo->servers[7].addr.s_addr = *bp++; - - ret = -EBADMSG; - if (vinfo->nservers > 8) - goto abort; - - /* success */ - ret = 0; - - out_unwait: - set_current_state(TASK_RUNNING); - remove_wait_queue(&call->waitq, &myself); - rxrpc_put_call(call); - out_put_conn: - afs_server_release_fsconn(server, conn); - out: - _leave(""); - return ret; - - abort: - set_current_state(TASK_UNINTERRUPTIBLE); - rxrpc_call_abort(call, ret); - schedule(); - goto out_unwait; - -} /* end afs_rxfs_get_volume_info() */ -#endif - -/*****************************************************************************/ + if (!last) + return 0; + + _leave(" = 0 [done]"); + return 0; +} + /* - * fetch the status information for a file + * FS.FetchData operation type + */ +static const struct afs_call_type afs_RXFSFetchData = { + .name = "FS.FetchData", + .deliver = afs_deliver_fs_fetch_data, + .abort_to_error = afs_abort_to_error, + .destructor = afs_flat_call_destructor, +}; + +/* + * fetch data from a file */ -int afs_rxfs_fetch_file_status(struct afs_server *server, - struct afs_vnode *vnode, - struct afs_volsync *volsync) +int afs_fs_fetch_data(struct afs_server *server, + struct key *key, + struct afs_vnode *vnode, + off_t offset, size_t length, + struct page *buffer, + const struct afs_wait_mode *wait_mode) { - struct afs_server_callslot callslot; - struct rxrpc_call *call; - struct kvec piov[1]; - size_t sent; - int ret; + struct afs_call *call; __be32 *bp; - DECLARE_WAITQUEUE(myself, current); + _enter(""); - _enter("%p,{%u,%u,%u}", - server, vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique); + call = afs_alloc_flat_call(&afs_RXFSFetchData, 24, (21 + 3 + 6) * 4); + if (!call) + return -ENOMEM; - /* get hold of the fileserver connection */ - ret = afs_server_request_callslot(server, &callslot); - if (ret < 0) - goto out; - - /* create a call through that connection */ - ret = rxrpc_create_call(callslot.conn, NULL, NULL, afs_rxfs_aemap, - &call); - if (ret < 0) { - printk("kAFS: Unable to create call: %d\n", ret); - goto out_put_conn; - } - call->app_opcode = FSFETCHSTATUS; - - /* we want to get event notifications from the call */ - add_wait_queue(&call->waitq, &myself); + call->key = key; + call->reply = vnode; + call->reply2 = NULL; /* volsync */ + call->reply3 = buffer; + call->service_id = FS_SERVICE; + call->port = htons(AFS_FS_PORT); /* marshall the parameters */ - bp = rxrpc_call_alloc_scratch(call, 16); - bp[0] = htonl(FSFETCHSTATUS); + bp = call->request; + bp[0] = htonl(FSFETCHDATA); bp[1] = htonl(vnode->fid.vid); bp[2] = htonl(vnode->fid.vnode); bp[3] = htonl(vnode->fid.unique); + bp[4] = htonl(offset); + bp[5] = htonl(length); - piov[0].iov_len = 16; - piov[0].iov_base = bp; - - /* send the parameters to the server */ - ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS, - 0, &sent); - if (ret < 0) - goto abort; - - /* wait for the reply to completely arrive */ - bp = rxrpc_call_alloc_scratch(call, 120); - - ret = rxrpc_call_read_data(call, bp, 120, - RXRPC_CALL_READ_BLOCK | - RXRPC_CALL_READ_ALL); - if (ret < 0) { - if (ret == -ECONNABORTED) { - ret = call->app_errno; - goto out_unwait; - } - goto abort; - } + return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); +} - /* unmarshall the reply */ - vnode->status.if_version = ntohl(*bp++); - vnode->status.type = ntohl(*bp++); - vnode->status.nlink = ntohl(*bp++); - vnode->status.size = ntohl(*bp++); - vnode->status.version = ntohl(*bp++); - vnode->status.author = ntohl(*bp++); - vnode->status.owner = ntohl(*bp++); - vnode->status.caller_access = ntohl(*bp++); - vnode->status.anon_access = ntohl(*bp++); - vnode->status.mode = ntohl(*bp++); - vnode->status.parent.vid = vnode->fid.vid; - vnode->status.parent.vnode = ntohl(*bp++); - vnode->status.parent.unique = ntohl(*bp++); - bp++; /* seg size */ - vnode->status.mtime_client = ntohl(*bp++); - vnode->status.mtime_server = ntohl(*bp++); - bp++; /* group */ - bp++; /* sync counter */ - vnode->status.version |= ((unsigned long long) ntohl(*bp++)) << 32; - bp++; /* spare2 */ - bp++; /* spare3 */ - bp++; /* spare4 */ +/* + * deliver reply data to an FS.GiveUpCallBacks + */ +static int afs_deliver_fs_give_up_callbacks(struct afs_call *call, + struct sk_buff *skb, bool last) +{ + _enter(",{%u},%d", skb->len, last); - vnode->cb_version = ntohl(*bp++); - vnode->cb_expiry = ntohl(*bp++); - vnode->cb_type = ntohl(*bp++); - - if (volsync) { - volsync->creation = ntohl(*bp++); - bp++; /* spare2 */ - bp++; /* spare3 */ - bp++; /* spare4 */ - bp++; /* spare5 */ - bp++; /* spare6 */ - } + if (skb->len > 0) + return -EBADMSG; /* shouldn't be any reply data */ + return 0; +} - /* success */ - ret = 0; - - out_unwait: - set_current_state(TASK_RUNNING); - remove_wait_queue(&call->waitq, &myself); - rxrpc_put_call(call); - out_put_conn: - afs_server_release_callslot(server, &callslot); - out: - _leave(""); - return ret; - - abort: - set_current_state(TASK_UNINTERRUPTIBLE); - rxrpc_call_abort(call, ret); - schedule(); - goto out_unwait; -} /* end afs_rxfs_fetch_file_status() */ - -/*****************************************************************************/ /* - * fetch the contents of a file or directory + * FS.GiveUpCallBacks operation type */ -int afs_rxfs_fetch_file_data(struct afs_server *server, - struct afs_vnode *vnode, - struct afs_rxfs_fetch_descriptor *desc, - struct afs_volsync *volsync) +static const struct afs_call_type afs_RXFSGiveUpCallBacks = { + .name = "FS.GiveUpCallBacks", + .deliver = afs_deliver_fs_give_up_callbacks, + .abort_to_error = afs_abort_to_error, + .destructor = afs_flat_call_destructor, +}; + +/* + * give up a set of callbacks + * - the callbacks are held in the server->cb_break ring + */ +int afs_fs_give_up_callbacks(struct afs_server *server, + const struct afs_wait_mode *wait_mode) { - struct afs_server_callslot callslot; - struct rxrpc_call *call; - struct kvec piov[1]; - size_t sent; - int ret; - __be32 *bp; + struct afs_call *call; + size_t ncallbacks; + __be32 *bp, *tp; + int loop; - DECLARE_WAITQUEUE(myself, current); - - _enter("%p,{fid={%u,%u,%u},sz=%Zu,of=%lu}", - server, - desc->fid.vid, - desc->fid.vnode, - desc->fid.unique, - desc->size, - desc->offset); - - /* get hold of the fileserver connection */ - ret = afs_server_request_callslot(server, &callslot); - if (ret < 0) - goto out; - - /* create a call through that connection */ - ret = rxrpc_create_call(callslot.conn, NULL, NULL, afs_rxfs_aemap, &call); - if (ret < 0) { - printk("kAFS: Unable to create call: %d\n", ret); - goto out_put_conn; - } - call->app_opcode = FSFETCHDATA; + ncallbacks = CIRC_CNT(server->cb_break_head, server->cb_break_tail, + ARRAY_SIZE(server->cb_break)); + + _enter("{%zu},", ncallbacks); + + if (ncallbacks == 0) + return 0; + if (ncallbacks > AFSCBMAX) + ncallbacks = AFSCBMAX; + + _debug("break %zu callbacks", ncallbacks); - /* we want to get event notifications from the call */ - add_wait_queue(&call->waitq, &myself); + call = afs_alloc_flat_call(&afs_RXFSGiveUpCallBacks, + 12 + ncallbacks * 6 * 4, 0); + if (!call) + return -ENOMEM; + + call->service_id = FS_SERVICE; + call->port = htons(AFS_FS_PORT); /* marshall the parameters */ - bp = rxrpc_call_alloc_scratch(call, 24); - bp[0] = htonl(FSFETCHDATA); - bp[1] = htonl(desc->fid.vid); - bp[2] = htonl(desc->fid.vnode); - bp[3] = htonl(desc->fid.unique); - bp[4] = htonl(desc->offset); - bp[5] = htonl(desc->size); - - piov[0].iov_len = 24; - piov[0].iov_base = bp; - - /* send the parameters to the server */ - ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS, - 0, &sent); - if (ret < 0) - goto abort; - - /* wait for the data count to arrive */ - ret = rxrpc_call_read_data(call, bp, 4, RXRPC_CALL_READ_BLOCK); - if (ret < 0) - goto read_failed; - - desc->actual = ntohl(bp[0]); - if (desc->actual != desc->size) { - ret = -EBADMSG; - goto abort; + bp = call->request; + tp = bp + 2 + ncallbacks * 3; + *bp++ = htonl(FSGIVEUPCALLBACKS); + *bp++ = htonl(ncallbacks); + *tp++ = htonl(ncallbacks); + + atomic_sub(ncallbacks, &server->cb_break_n); + for (loop = ncallbacks; loop > 0; loop--) { + struct afs_callback *cb = + &server->cb_break[server->cb_break_tail]; + + *bp++ = htonl(cb->fid.vid); + *bp++ = htonl(cb->fid.vnode); + *bp++ = htonl(cb->fid.unique); + *tp++ = htonl(cb->version); + *tp++ = htonl(cb->expiry); + *tp++ = htonl(cb->type); + smp_mb(); + server->cb_break_tail = + (server->cb_break_tail + 1) & + (ARRAY_SIZE(server->cb_break) - 1); } - /* call the app to read the actual data */ - rxrpc_call_reset_scratch(call); - - ret = rxrpc_call_read_data(call, desc->buffer, desc->actual, - RXRPC_CALL_READ_BLOCK); - if (ret < 0) - goto read_failed; - - /* wait for the rest of the reply to completely arrive */ - rxrpc_call_reset_scratch(call); - bp = rxrpc_call_alloc_scratch(call, 120); - - ret = rxrpc_call_read_data(call, bp, 120, - RXRPC_CALL_READ_BLOCK | - RXRPC_CALL_READ_ALL); - if (ret < 0) - goto read_failed; - - /* unmarshall the reply */ - vnode->status.if_version = ntohl(*bp++); - vnode->status.type = ntohl(*bp++); - vnode->status.nlink = ntohl(*bp++); - vnode->status.size = ntohl(*bp++); - vnode->status.version = ntohl(*bp++); - vnode->status.author = ntohl(*bp++); - vnode->status.owner = ntohl(*bp++); - vnode->status.caller_access = ntohl(*bp++); - vnode->status.anon_access = ntohl(*bp++); - vnode->status.mode = ntohl(*bp++); - vnode->status.parent.vid = desc->fid.vid; - vnode->status.parent.vnode = ntohl(*bp++); - vnode->status.parent.unique = ntohl(*bp++); - bp++; /* seg size */ - vnode->status.mtime_client = ntohl(*bp++); - vnode->status.mtime_server = ntohl(*bp++); - bp++; /* group */ - bp++; /* sync counter */ - vnode->status.version |= ((unsigned long long) ntohl(*bp++)) << 32; - bp++; /* spare2 */ - bp++; /* spare3 */ - bp++; /* spare4 */ + ASSERT(ncallbacks > 0); + wake_up_nr(&server->cb_break_waitq, ncallbacks); - vnode->cb_version = ntohl(*bp++); - vnode->cb_expiry = ntohl(*bp++); - vnode->cb_type = ntohl(*bp++); - - if (volsync) { - volsync->creation = ntohl(*bp++); - bp++; /* spare2 */ - bp++; /* spare3 */ - bp++; /* spare4 */ - bp++; /* spare5 */ - bp++; /* spare6 */ - } + return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); +} - /* success */ - ret = 0; - - out_unwait: - set_current_state(TASK_RUNNING); - remove_wait_queue(&call->waitq,&myself); - rxrpc_put_call(call); - out_put_conn: - afs_server_release_callslot(server, &callslot); - out: - _leave(" = %d", ret); - return ret; - - read_failed: - if (ret == -ECONNABORTED) { - ret = call->app_errno; - goto out_unwait; - } +/* + * deliver reply data to an FS.CreateFile or an FS.MakeDir + */ +static int afs_deliver_fs_create_vnode(struct afs_call *call, + struct sk_buff *skb, bool last) +{ + struct afs_vnode *vnode = call->reply; + const __be32 *bp; + + _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); - abort: - set_current_state(TASK_UNINTERRUPTIBLE); - rxrpc_call_abort(call, ret); - schedule(); - goto out_unwait; + afs_transfer_reply(call, skb); + if (!last) + return 0; -} /* end afs_rxfs_fetch_file_data() */ + if (call->reply_size != call->reply_max) + return -EBADMSG; + + /* unmarshall the reply once we've received all of it */ + bp = call->buffer; + xdr_decode_AFSFid(&bp, call->reply2); + xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL); + xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode); + xdr_decode_AFSCallBack_raw(&bp, call->reply4); + /* xdr_decode_AFSVolSync(&bp, call->replyX); */ + + _leave(" = 0 [done]"); + return 0; +} + +/* + * FS.CreateFile and FS.MakeDir operation type + */ +static const struct afs_call_type afs_RXFSCreateXXXX = { + .name = "FS.CreateXXXX", + .deliver = afs_deliver_fs_create_vnode, + .abort_to_error = afs_abort_to_error, + .destructor = afs_flat_call_destructor, +}; -/*****************************************************************************/ /* - * ask the AFS fileserver to discard a callback request on a file + * create a file or make a directory */ -int afs_rxfs_give_up_callback(struct afs_server *server, - struct afs_vnode *vnode) +int afs_fs_create(struct afs_server *server, + struct key *key, + struct afs_vnode *vnode, + const char *name, + umode_t mode, + struct afs_fid *newfid, + struct afs_file_status *newstatus, + struct afs_callback *newcb, + const struct afs_wait_mode *wait_mode) { - struct afs_server_callslot callslot; - struct rxrpc_call *call; - struct kvec piov[1]; - size_t sent; - int ret; + struct afs_call *call; + size_t namesz, reqsz, padsz; __be32 *bp; - DECLARE_WAITQUEUE(myself, current); + _enter(""); - _enter("%p,{%u,%u,%u}", - server, vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique); + namesz = strlen(name); + padsz = (4 - (namesz & 3)) & 3; + reqsz = (5 * 4) + namesz + padsz + (6 * 4); - /* get hold of the fileserver connection */ - ret = afs_server_request_callslot(server, &callslot); - if (ret < 0) - goto out; + call = afs_alloc_flat_call(&afs_RXFSCreateXXXX, reqsz, + (3 + 21 + 21 + 3 + 6) * 4); + if (!call) + return -ENOMEM; - /* create a call through that connection */ - ret = rxrpc_create_call(callslot.conn, NULL, NULL, afs_rxfs_aemap, &call); - if (ret < 0) { - printk("kAFS: Unable to create call: %d\n", ret); - goto out_put_conn; + call->key = key; + call->reply = vnode; + call->reply2 = newfid; + call->reply3 = newstatus; + call->reply4 = newcb; + call->service_id = FS_SERVICE; + call->port = htons(AFS_FS_PORT); + + /* marshall the parameters */ + bp = call->request; + *bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE); + *bp++ = htonl(vnode->fid.vid); + *bp++ = htonl(vnode->fid.vnode); + *bp++ = htonl(vnode->fid.unique); + *bp++ = htonl(namesz); + memcpy(bp, name, namesz); + bp = (void *) bp + namesz; + if (padsz > 0) { + memset(bp, 0, padsz); + bp = (void *) bp + padsz; } - call->app_opcode = FSGIVEUPCALLBACKS; + *bp++ = htonl(AFS_SET_MODE); + *bp++ = 0; /* mtime */ + *bp++ = 0; /* owner */ + *bp++ = 0; /* group */ + *bp++ = htonl(mode & S_IALLUGO); /* unix mode */ + *bp++ = 0; /* segment size */ - /* we want to get event notifications from the call */ - add_wait_queue(&call->waitq, &myself); + return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); +} - /* marshall the parameters */ - bp = rxrpc_call_alloc_scratch(call, (1 + 4 + 4) * 4); +/* + * deliver reply data to an FS.RemoveFile or FS.RemoveDir + */ +static int afs_deliver_fs_remove(struct afs_call *call, + struct sk_buff *skb, bool last) +{ + struct afs_vnode *vnode = call->reply; + const __be32 *bp; - piov[0].iov_len = (1 + 4 + 4) * 4; - piov[0].iov_base = bp; + _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); - *bp++ = htonl(FSGIVEUPCALLBACKS); - *bp++ = htonl(1); + 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_AFSFetchStatus(&bp, &vnode->status, vnode); + /* xdr_decode_AFSVolSync(&bp, call->replyX); */ + + _leave(" = 0 [done]"); + return 0; +} + +/* + * FS.RemoveDir/FS.RemoveFile operation type + */ +static const struct afs_call_type afs_RXFSRemoveXXXX = { + .name = "FS.RemoveXXXX", + .deliver = afs_deliver_fs_remove, + .abort_to_error = afs_abort_to_error, + .destructor = afs_flat_call_destructor, +}; + +/* + * remove a file or directory + */ +int afs_fs_remove(struct afs_server *server, + struct key *key, + struct afs_vnode *vnode, + const char *name, + bool isdir, + const struct afs_wait_mode *wait_mode) +{ + struct afs_call *call; + size_t namesz, reqsz, padsz; + __be32 *bp; + + _enter(""); + + namesz = strlen(name); + padsz = (4 - (namesz & 3)) & 3; + reqsz = (5 * 4) + namesz + padsz; + + call = afs_alloc_flat_call(&afs_RXFSRemoveXXXX, reqsz, (21 + 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(isdir ? FSREMOVEDIR : FSREMOVEFILE); *bp++ = htonl(vnode->fid.vid); *bp++ = htonl(vnode->fid.vnode); *bp++ = htonl(vnode->fid.unique); - *bp++ = htonl(1); - *bp++ = htonl(vnode->cb_version); - *bp++ = htonl(vnode->cb_expiry); - *bp++ = htonl(vnode->cb_type); - - /* send the parameters to the server */ - ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS, - 0, &sent); - if (ret < 0) - goto abort; - - /* wait for the reply to completely arrive */ - for (;;) { - set_current_state(TASK_INTERRUPTIBLE); - if (call->app_call_state != RXRPC_CSTATE_CLNT_RCV_REPLY || - signal_pending(current)) - break; - schedule(); + *bp++ = htonl(namesz); + memcpy(bp, name, namesz); + bp = (void *) bp + namesz; + if (padsz > 0) { + memset(bp, 0, padsz); + bp = (void *) bp + padsz; } - set_current_state(TASK_RUNNING); - ret = -EINTR; - if (signal_pending(current)) - goto abort; + return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); +} - switch (call->app_call_state) { - case RXRPC_CSTATE_ERROR: - ret = call->app_errno; - goto out_unwait; +/* + * deliver reply data to an FS.Link + */ +static int afs_deliver_fs_link(struct afs_call *call, + struct sk_buff *skb, bool last) +{ + struct afs_vnode *dvnode = call->reply, *vnode = call->reply2; + const __be32 *bp; - case RXRPC_CSTATE_CLNT_GOT_REPLY: - ret = 0; - goto out_unwait; + _enter("{%u},{%u},%d", call->unmarshall, skb->len, last); - default: - BUG(); - } + 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_AFSFetchStatus(&bp, &vnode->status, vnode); + xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode); + /* xdr_decode_AFSVolSync(&bp, call->replyX); */ + + _leave(" = 0 [done]"); + return 0; +} + +/* + * FS.Link operation type + */ +static const struct afs_call_type afs_RXFSLink = { + .name = "FS.Link", + .deliver = afs_deliver_fs_link, + .abort_to_error = afs_abort_to_error, + .destructor = afs_flat_call_destructor, +}; - out_unwait: - set_current_state(TASK_RUNNING); - remove_wait_queue(&call->waitq, &myself); - rxrpc_put_call(call); - out_put_conn: - afs_server_release_callslot(server, &callslot); - out: - _leave(""); - return ret; - - abort: - set_current_state(TASK_UNINTERRUPTIBLE); - rxrpc_call_abort(call, ret); - schedule(); - goto out_unwait; -} /* end afs_rxfs_give_up_callback() */ - -/*****************************************************************************/ /* - * look a filename up in a directory - * - this operation doesn't seem to work correctly in OpenAFS server 1.2.2 + * make a hard link */ -#if 0 -int afs_rxfs_lookup(struct afs_server *server, - struct afs_vnode *dir, - const char *filename, - struct afs_vnode *vnode, - struct afs_volsync *volsync) +int afs_fs_link(struct afs_server *server, + struct key *key, + struct afs_vnode *dvnode, + struct afs_vnode *vnode, + const char *name, + const struct afs_wait_mode *wait_mode) { - struct rxrpc_connection *conn; - struct rxrpc_call *call; - struct kvec piov[3]; - size_t sent; - int ret; - u32 *bp, zero; + struct afs_call *call; + size_t namesz, reqsz, padsz; + __be32 *bp; - DECLARE_WAITQUEUE(myself, current); + _enter(""); - kenter("%p,{%u,%u,%u},%s", - server, fid->vid, fid->vnode, fid->unique, filename); + namesz = strlen(name); + padsz = (4 - (namesz & 3)) & 3; + reqsz = (5 * 4) + namesz + padsz + (3 * 4); - /* get hold of the fileserver connection */ - ret = afs_server_get_fsconn(server, &conn); - if (ret < 0) - goto out; + call = afs_alloc_flat_call(&afs_RXFSLink, reqsz, (21 + 21 + 6) * 4); + if (!call) + return -ENOMEM; - /* create a call through that connection */ - ret = rxrpc_create_call(conn, NULL, NULL, afs_rxfs_aemap, &call); - if (ret < 0) { - printk("kAFS: Unable to create call: %d\n", ret); - goto out_put_conn; + call->key = key; + call->reply = dvnode; + call->reply2 = vnode; + call->service_id = FS_SERVICE; + call->port = htons(AFS_FS_PORT); + + /* marshall the parameters */ + bp = call->request; + *bp++ = htonl(FSLINK); + *bp++ = htonl(dvnode->fid.vid); + *bp++ = htonl(dvnode->fid.vnode); + *bp++ = htonl(dvnode->fid.unique); + *bp++ = htonl(namesz); + memcpy(bp, name, namesz); + bp = (void *) bp + namesz; + if (padsz > 0) { + memset(bp, 0, padsz); + bp = (void *) bp + padsz; } - call->app_opcode = FSLOOKUP; + *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); +} + +/* + * deliver reply data to an FS.Symlink + */ +static int afs_deliver_fs_symlink(struct afs_call *call, + struct sk_buff *skb, bool last) +{ + struct afs_vnode *vnode = call->reply; + const __be32 *bp; - /* we want to get event notifications from the call */ - add_wait_queue(&call->waitq,&myself); + _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_AFSFid(&bp, call->reply2); + xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL); + xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode); + /* xdr_decode_AFSVolSync(&bp, call->replyX); */ + + _leave(" = 0 [done]"); + return 0; +} + +/* + * FS.Symlink operation type + */ +static const struct afs_call_type afs_RXFSSymlink = { + .name = "FS.Symlink", + .deliver = afs_deliver_fs_symlink, + .abort_to_error = afs_abort_to_error, + .destructor = afs_flat_call_destructor, +}; + +/* + * create a symbolic link + */ +int afs_fs_symlink(struct afs_server *server, + struct key *key, + struct afs_vnode *vnode, + const char *name, + const char *contents, + struct afs_fid *newfid, + struct afs_file_status *newstatus, + const struct afs_wait_mode *wait_mode) +{ + struct afs_call *call; + size_t namesz, reqsz, padsz, c_namesz, c_padsz; + __be32 *bp; + + _enter(""); + + namesz = strlen(name); + padsz = (4 - (namesz & 3)) & 3; + + c_namesz = strlen(contents); + c_padsz = (4 - (c_namesz & 3)) & 3; + + reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4); + + call = afs_alloc_flat_call(&afs_RXFSSymlink, reqsz, + (3 + 21 + 21 + 6) * 4); + if (!call) + return -ENOMEM; + + call->key = key; + call->reply = vnode; + call->reply2 = newfid; + call->reply3 = newstatus; + call->service_id = FS_SERVICE; + call->port = htons(AFS_FS_PORT); /* marshall the parameters */ - bp = rxrpc_call_alloc_scratch(call, 20); - - zero = 0; - - piov[0].iov_len = 20; - piov[0].iov_base = bp; - piov[1].iov_len = strlen(filename); - piov[1].iov_base = (char *) filename; - piov[2].iov_len = (4 - (piov[1].iov_len & 3)) & 3; - piov[2].iov_base = &zero; - - *bp++ = htonl(FSLOOKUP); - *bp++ = htonl(dirfid->vid); - *bp++ = htonl(dirfid->vnode); - *bp++ = htonl(dirfid->unique); - *bp++ = htonl(piov[1].iov_len); - - /* send the parameters to the server */ - ret = rxrpc_call_write_data(call, 3, piov, RXRPC_LAST_PACKET, GFP_NOFS, - 0, &sent); - if (ret < 0) - goto abort; - - /* wait for the reply to completely arrive */ - bp = rxrpc_call_alloc_scratch(call, 220); - - ret = rxrpc_call_read_data(call, bp, 220, - RXRPC_CALL_READ_BLOCK | - RXRPC_CALL_READ_ALL); - if (ret < 0) { - if (ret == -ECONNABORTED) { - ret = call->app_errno; - goto out_unwait; - } - goto abort; + bp = call->request; + *bp++ = htonl(FSSYMLINK); + *bp++ = htonl(vnode->fid.vid); + *bp++ = htonl(vnode->fid.vnode); + *bp++ = htonl(vnode->fid.unique); + *bp++ = htonl(namesz); + memcpy(bp, name, namesz); + bp = (void *) bp + namesz; + if (padsz > 0) { + memset(bp, 0, padsz); + bp = (void *) bp + padsz; } + *bp++ = htonl(c_namesz); + memcpy(bp, contents, c_namesz); + bp = (void *) bp + c_namesz; + if (c_padsz > 0) { + memset(bp, 0, c_padsz); + bp = (void *) bp + c_padsz; + } + *bp++ = htonl(AFS_SET_MODE); + *bp++ = 0; /* mtime */ + *bp++ = 0; /* owner */ + *bp++ = 0; /* group */ + *bp++ = htonl(S_IRWXUGO); /* unix mode */ + *bp++ = 0; /* segment size */ - /* unmarshall the reply */ - fid->vid = ntohl(*bp++); - fid->vnode = ntohl(*bp++); - fid->unique = ntohl(*bp++); + return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); +} - vnode->status.if_version = ntohl(*bp++); - vnode->status.type = ntohl(*bp++); - vnode->status.nlink = ntohl(*bp++); - vnode->status.size = ntohl(*bp++); - vnode->status.version = ntohl(*bp++); - vnode->status.author = ntohl(*bp++); - vnode->status.owner = ntohl(*bp++); - vnode->status.caller_access = ntohl(*bp++); - vnode->status.anon_access = ntohl(*bp++); - vnode->status.mode = ntohl(*bp++); - vnode->status.parent.vid = dirfid->vid; - vnode->status.parent.vnode = ntohl(*bp++); - vnode->status.parent.unique = ntohl(*bp++); - bp++; /* seg size */ - vnode->status.mtime_client = ntohl(*bp++); - vnode->status.mtime_server = ntohl(*bp++); - bp++; /* group */ - bp++; /* sync counter */ - vnode->status.version |= ((unsigned long long) ntohl(*bp++)) << 32; - bp++; /* spare2 */ - bp++; /* spare3 */ - bp++; /* spare4 */ +/* + * deliver reply data to an FS.Rename + */ +static int afs_deliver_fs_rename(struct afs_call *call, + struct sk_buff *skb, bool last) +{ + struct afs_vnode *orig_dvnode = call->reply, *new_dvnode = call->reply2; + const __be32 *bp; - dir->status.if_version = ntohl(*bp++); - dir->status.type = ntohl(*bp++); - dir->status.nlink = ntohl(*bp++); - dir->status.size = ntohl(*bp++); - dir->status.version = ntohl(*bp++); - dir->status.author = ntohl(*bp++); - dir->status.owner = ntohl(*bp++); - dir->status.caller_access = ntohl(*bp++); - dir->status.anon_access = ntohl(*bp++); - dir->status.mode = ntohl(*bp++); - dir->status.parent.vid = dirfid->vid; - dir->status.parent.vnode = ntohl(*bp++); - dir->status.parent.unique = ntohl(*bp++); - bp++; /* seg size */ - dir->status.mtime_client = ntohl(*bp++); - dir->status.mtime_server = ntohl(*bp++); - bp++; /* group */ - bp++; /* sync counter */ - dir->status.version |= ((unsigned long long) ntohl(*bp++)) << 32; - bp++; /* spare2 */ - bp++; /* spare3 */ - bp++; /* spare4 */ + _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_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode); + if (new_dvnode != orig_dvnode) + xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode); + /* xdr_decode_AFSVolSync(&bp, call->replyX); */ + + _leave(" = 0 [done]"); + return 0; +} + +/* + * FS.Rename operation type + */ +static const struct afs_call_type afs_RXFSRename = { + .name = "FS.Rename", + .deliver = afs_deliver_fs_rename, + .abort_to_error = afs_abort_to_error, + .destructor = afs_flat_call_destructor, +}; + +/* + * create a symbolic link + */ +int afs_fs_rename(struct afs_server *server, + struct key *key, + struct afs_vnode *orig_dvnode, + const char *orig_name, + struct afs_vnode *new_dvnode, + const char *new_name, + const struct afs_wait_mode *wait_mode) +{ + struct afs_call *call; + size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz; + __be32 *bp; + + _enter(""); + + o_namesz = strlen(orig_name); + o_padsz = (4 - (o_namesz & 3)) & 3; + + n_namesz = strlen(new_name); + n_padsz = (4 - (n_namesz & 3)) & 3; + + reqsz = (4 * 4) + + 4 + o_namesz + o_padsz + + (3 * 4) + + 4 + n_namesz + n_padsz; + + call = afs_alloc_flat_call(&afs_RXFSRename, reqsz, (21 + 21 + 6) * 4); + if (!call) + return -ENOMEM; + + call->key = key; + call->reply = orig_dvnode; + call->reply2 = new_dvnode; + call->service_id = FS_SERVICE; + call->port = htons(AFS_FS_PORT); + + /* marshall the parameters */ + bp = call->request; + *bp++ = htonl(FSRENAME); + *bp++ = htonl(orig_dvnode->fid.vid); + *bp++ = htonl(orig_dvnode->fid.vnode); + *bp++ = htonl(orig_dvnode->fid.unique); + *bp++ = htonl(o_namesz); + memcpy(bp, orig_name, o_namesz); + bp = (void *) bp + o_namesz; + if (o_padsz > 0) { + memset(bp, 0, o_padsz); + bp = (void *) bp + o_padsz; + } - callback->fid = *fid; - callback->version = ntohl(*bp++); - callback->expiry = ntohl(*bp++); - callback->type = ntohl(*bp++); - - if (volsync) { - volsync->creation = ntohl(*bp++); - bp++; /* spare2 */ - bp++; /* spare3 */ - bp++; /* spare4 */ - bp++; /* spare5 */ - bp++; /* spare6 */ + *bp++ = htonl(new_dvnode->fid.vid); + *bp++ = htonl(new_dvnode->fid.vnode); + *bp++ = htonl(new_dvnode->fid.unique); + *bp++ = htonl(n_namesz); + memcpy(bp, new_name, n_namesz); + bp = (void *) bp + n_namesz; + if (n_padsz > 0) { + memset(bp, 0, n_padsz); + bp = (void *) bp + n_padsz; } - /* success */ - ret = 0; - - out_unwait: - set_current_state(TASK_RUNNING); - remove_wait_queue(&call->waitq, &myself); - rxrpc_put_call(call); - out_put_conn: - afs_server_release_fsconn(server, conn); - out: - kleave(""); - return ret; - - abort: - set_current_state(TASK_UNINTERRUPTIBLE); - rxrpc_call_abort(call, ret); - schedule(); - goto out_unwait; -} /* end afs_rxfs_lookup() */ -#endif + return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode); +} diff --git a/fs/afs/fsclient.h b/fs/afs/fsclient.h deleted file mode 100644 index 8ba3e74..0000000 --- a/fs/afs/fsclient.h +++ /dev/null @@ -1,54 +0,0 @@ -/* fsclient.h: AFS File Server client stub declarations - * - * Copyright (C) 2002 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. - */ - -#ifndef _LINUX_AFS_FSCLIENT_H -#define _LINUX_AFS_FSCLIENT_H - -#include "server.h" - -extern int afs_rxfs_get_volume_info(struct afs_server *server, - const char *name, - struct afs_volume_info *vinfo); - -extern int afs_rxfs_fetch_file_status(struct afs_server *server, - struct afs_vnode *vnode, - struct afs_volsync *volsync); - -struct afs_rxfs_fetch_descriptor { - struct afs_fid fid; /* file ID to fetch */ - size_t size; /* total number of bytes to fetch */ - off_t offset; /* offset in file to start from */ - void *buffer; /* read buffer */ - size_t actual; /* actual size sent back by server */ -}; - -extern int afs_rxfs_fetch_file_data(struct afs_server *server, - struct afs_vnode *vnode, - struct afs_rxfs_fetch_descriptor *desc, - struct afs_volsync *volsync); - -extern int afs_rxfs_give_up_callback(struct afs_server *server, - struct afs_vnode *vnode); - -/* this doesn't appear to work in OpenAFS server */ -extern int afs_rxfs_lookup(struct afs_server *server, - struct afs_vnode *dir, - const char *filename, - struct afs_vnode *vnode, - struct afs_volsync *volsync); - -/* this is apparently mis-implemented in OpenAFS server */ -extern int afs_rxfs_get_root_volume(struct afs_server *server, - char *buf, - size_t *buflen); - - -#endif /* _LINUX_AFS_FSCLIENT_H */ diff --git a/fs/afs/inode.c b/fs/afs/inode.c index 9d9bca6..c184a4e 100644 --- a/fs/afs/inode.c +++ b/fs/afs/inode.c @@ -19,9 +19,6 @@ #include <linux/slab.h> #include <linux/fs.h> #include <linux/pagemap.h> -#include "volume.h" -#include "vnode.h" -#include "super.h" #include "internal.h" struct afs_iget_data { @@ -29,26 +26,25 @@ struct afs_iget_data { struct afs_volume *volume; /* volume on which resides */ }; -/*****************************************************************************/ /* * map the AFS file status to the inode member variables */ -static int afs_inode_map_status(struct afs_vnode *vnode) +static int afs_inode_map_status(struct afs_vnode *vnode, struct key *key) { struct inode *inode = AFS_VNODE_TO_I(vnode); - _debug("FS: ft=%d lk=%d sz=%Zu ver=%Lu mod=%hu", + _debug("FS: ft=%d lk=%d sz=%llu ver=%Lu mod=%hu", vnode->status.type, vnode->status.nlink, - vnode->status.size, - vnode->status.version, + (unsigned long long) vnode->status.size, + vnode->status.data_version, vnode->status.mode); switch (vnode->status.type) { case AFS_FTYPE_FILE: inode->i_mode = S_IFREG | vnode->status.mode; inode->i_op = &afs_file_inode_operations; - inode->i_fop = &generic_ro_fops; + inode->i_fop = &afs_file_operations; break; case AFS_FTYPE_DIR: inode->i_mode = S_IFDIR | vnode->status.mode; @@ -77,9 +73,9 @@ static int afs_inode_map_status(struct afs_vnode *vnode) /* check to see whether a symbolic link is really a mountpoint */ if (vnode->status.type == AFS_FTYPE_SYMLINK) { - afs_mntpt_check_symlink(vnode); + afs_mntpt_check_symlink(vnode, key); - if (vnode->flags & AFS_VNODE_MOUNTPOINT) { + if (test_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags)) { inode->i_mode = S_IFDIR | vnode->status.mode; inode->i_op = &afs_mntpt_inode_operations; inode->i_fop = &afs_mntpt_file_operations; @@ -87,30 +83,8 @@ static int afs_inode_map_status(struct afs_vnode *vnode) } return 0; -} /* end afs_inode_map_status() */ +} -/*****************************************************************************/ -/* - * attempt to fetch the status of an inode, coelescing multiple simultaneous - * fetches - */ -static int afs_inode_fetch_status(struct inode *inode) -{ - struct afs_vnode *vnode; - int ret; - - vnode = AFS_FS_I(inode); - - ret = afs_vnode_fetch_status(vnode); - - if (ret == 0) - ret = afs_inode_map_status(vnode); - - return ret; - -} /* end afs_inode_fetch_status() */ - -/*****************************************************************************/ /* * iget5() comparator */ @@ -120,9 +94,8 @@ static int afs_iget5_test(struct inode *inode, void *opaque) return inode->i_ino == data->fid.vnode && inode->i_version == data->fid.unique; -} /* end afs_iget5_test() */ +} -/*****************************************************************************/ /* * iget5() inode initialiser */ @@ -137,14 +110,14 @@ static int afs_iget5_set(struct inode *inode, void *opaque) vnode->volume = data->volume; return 0; -} /* end afs_iget5_set() */ +} -/*****************************************************************************/ /* * inode retrieval */ -inline int afs_iget(struct super_block *sb, struct afs_fid *fid, - struct inode **_inode) +struct inode *afs_iget(struct super_block *sb, struct key *key, + struct afs_fid *fid, struct afs_file_status *status, + struct afs_callback *cb) { struct afs_iget_data data = { .fid = *fid }; struct afs_super_info *as; @@ -161,20 +134,18 @@ inline int afs_iget(struct super_block *sb, struct afs_fid *fid, &data); if (!inode) { _leave(" = -ENOMEM"); - return -ENOMEM; + return ERR_PTR(-ENOMEM); } + _debug("GOT INODE %p { vl=%x vn=%x, u=%x }", + inode, fid->vid, fid->vnode, fid->unique); + vnode = AFS_FS_I(inode); /* deal with an existing inode */ if (!(inode->i_state & I_NEW)) { - ret = afs_vnode_fetch_status(vnode); - if (ret==0) - *_inode = inode; - else - iput(inode); - _leave(" = %d", ret); - return ret; + _leave(" = %p", inode); + return inode; } #ifdef AFS_CACHING_SUPPORT @@ -186,100 +157,185 @@ inline int afs_iget(struct super_block *sb, struct afs_fid *fid, &vnode->cache); #endif - /* okay... it's a new inode */ - inode->i_flags |= S_NOATIME; - vnode->flags |= AFS_VNODE_CHANGED; - ret = afs_inode_fetch_status(inode); - if (ret<0) + if (!status) { + /* it's a remotely extant inode */ + set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags); + ret = afs_vnode_fetch_status(vnode, NULL, key); + if (ret < 0) + goto bad_inode; + } else { + /* it's an inode we just created */ + memcpy(&vnode->status, status, sizeof(vnode->status)); + + if (!cb) { + /* it's a symlink we just created (the fileserver + * didn't give us a callback) */ + vnode->cb_version = 0; + vnode->cb_expiry = 0; + vnode->cb_type = 0; + vnode->cb_expires = get_seconds(); + } else { + vnode->cb_version = cb->version; + vnode->cb_expiry = cb->expiry; + vnode->cb_type = cb->type; + vnode->cb_expires = vnode->cb_expiry + get_seconds(); + } + } + + ret = afs_inode_map_status(vnode, key); + if (ret < 0) goto bad_inode; /* success */ + clear_bit(AFS_VNODE_UNSET, &vnode->flags); + inode->i_flags |= S_NOATIME; unlock_new_inode(inode); - - *_inode = inode; - _leave(" = 0 [CB { v=%u x=%lu t=%u }]", - vnode->cb_version, - vnode->cb_timeout.timo_jif, - vnode->cb_type); - return 0; + _leave(" = %p [CB { v=%u t=%u }]", inode, vnode->cb_version, vnode->cb_type); + return inode; /* failure */ - bad_inode: +bad_inode: make_bad_inode(inode); unlock_new_inode(inode); iput(inode); _leave(" = %d [bad]", ret); + return ERR_PTR(ret); +} + +/* + * validate a vnode/inode + * - there are several things we need to check + * - parent dir data changes (rm, rmdir, rename, mkdir, create, link, + * symlink) + * - parent dir metadata changed (security changes) + * - dentry data changed (write, truncate) + * - dentry metadata changed (security changes) + */ +int afs_validate(struct afs_vnode *vnode, struct key *key) +{ + int ret; + + _enter("{v={%x:%u} fl=%lx},%x", + vnode->fid.vid, vnode->fid.vnode, vnode->flags, + key_serial(key)); + + if (vnode->cb_promised && + !test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags) && + !test_bit(AFS_VNODE_MODIFIED, &vnode->flags) && + !test_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) { + if (vnode->cb_expires < get_seconds() + 10) { + _debug("callback expired"); + set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags); + } else { + goto valid; + } + } + + if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) + goto valid; + + mutex_lock(&vnode->validate_lock); + + /* if the promise has expired, we need to check the server again to get + * a new promise - note that if the (parent) directory's metadata was + * changed then the security may be different and we may no longer have + * access */ + if (!vnode->cb_promised || + test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) { + _debug("not promised"); + ret = afs_vnode_fetch_status(vnode, NULL, key); + if (ret < 0) + goto error_unlock; + _debug("new promise [fl=%lx]", vnode->flags); + } + + if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) { + _debug("file already deleted"); + ret = -ESTALE; + goto error_unlock; + } + + /* if the vnode's data version number changed then its contents are + * different */ + if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) { + _debug("zap data {%x:%d}", vnode->fid.vid, vnode->fid.vnode); + invalidate_remote_inode(&vnode->vfs_inode); + } + + clear_bit(AFS_VNODE_MODIFIED, &vnode->flags); + mutex_unlock(&vnode->validate_lock); +valid: + _leave(" = 0"); + return 0; + +error_unlock: + mutex_unlock(&vnode->validate_lock); + _leave(" = %d", ret); return ret; -} /* end afs_iget() */ +} -/*****************************************************************************/ /* * read the attributes of an inode */ int afs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) { - struct afs_vnode *vnode; struct inode *inode; - int ret; inode = dentry->d_inode; _enter("{ ino=%lu v=%lu }", inode->i_ino, inode->i_version); - vnode = AFS_FS_I(inode); - - ret = afs_inode_fetch_status(inode); - if (ret == -ENOENT) { - _leave(" = %d [%d %p]", - ret, atomic_read(&dentry->d_count), dentry->d_inode); - return ret; - } - else if (ret < 0) { - make_bad_inode(inode); - _leave(" = %d", ret); - return ret; - } - - /* transfer attributes from the inode structure to the stat - * structure */ generic_fillattr(inode, stat); - - _leave(" = 0 CB { v=%u x=%u t=%u }", - vnode->cb_version, - vnode->cb_expiry, - vnode->cb_type); - return 0; -} /* end afs_inode_getattr() */ +} -/*****************************************************************************/ /* * clear an AFS inode */ void afs_clear_inode(struct inode *inode) { + struct afs_permits *permits; struct afs_vnode *vnode; vnode = AFS_FS_I(inode); - _enter("ino=%lu { vn=%08x v=%u x=%u t=%u }", - inode->i_ino, + _enter("{%x:%d.%d} v=%u x=%u t=%u }", + vnode->fid.vid, vnode->fid.vnode, + vnode->fid.unique, vnode->cb_version, vnode->cb_expiry, - vnode->cb_type - ); + vnode->cb_type); - BUG_ON(inode->i_ino != vnode->fid.vnode); + _debug("CLEAR INODE %p", inode); - afs_vnode_give_up_callback(vnode); + ASSERTCMP(inode->i_ino, ==, vnode->fid.vnode); + + afs_give_up_callback(vnode); + + if (vnode->server) { + spin_lock(&vnode->server->fs_lock); + rb_erase(&vnode->server_rb, &vnode->server->fs_vnodes); + spin_unlock(&vnode->server->fs_lock); + afs_put_server(vnode->server); + vnode->server = NULL; + } + + ASSERT(!vnode->cb_promised); #ifdef AFS_CACHING_SUPPORT cachefs_relinquish_cookie(vnode->cache, 0); vnode->cache = NULL; #endif + mutex_lock(&vnode->permits_lock); + permits = vnode->permits; + rcu_assign_pointer(vnode->permits, NULL); + mutex_unlock(&vnode->permits_lock); + if (permits) + call_rcu(&permits->rcu, afs_zap_permits); + _leave(""); -} /* end afs_clear_inode() */ +} diff --git a/fs/afs/internal.h b/fs/afs/internal.h index 5151d5da..6dd3197 100644 --- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -1,6 +1,6 @@ -/* internal.h: internal AFS stuff +/* internal AFS stuff * - * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. + * Copyright (C) 2002, 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 @@ -9,48 +9,391 @@ * 2 of the License, or (at your option) any later version. */ -#ifndef AFS_INTERNAL_H -#define AFS_INTERNAL_H - #include <linux/compiler.h> #include <linux/kernel.h> #include <linux/fs.h> #include <linux/pagemap.h> +#include <linux/skbuff.h> +#include <linux/rxrpc.h> +#include <linux/key.h> +#include "afs.h" +#include "afs_vl.h" + +#define AFS_CELL_MAX_ADDRS 15 + +struct afs_call; + +typedef enum { + AFS_VL_NEW, /* new, uninitialised record */ + AFS_VL_CREATING, /* creating record */ + AFS_VL_VALID, /* record is pending */ + AFS_VL_NO_VOLUME, /* no such volume available */ + AFS_VL_UPDATING, /* update in progress */ + AFS_VL_VOLUME_DELETED, /* volume was deleted */ + AFS_VL_UNCERTAIN, /* uncertain state (update failed) */ +} __attribute__((packed)) afs_vlocation_state_t; + +struct afs_mount_params { + bool rwpath; /* T if the parent should be considered R/W */ + bool force; /* T to force cell type */ + afs_voltype_t type; /* type of volume requested */ + int volnamesz; /* size of volume name */ + const char *volname; /* name of volume to mount */ + struct afs_cell *cell; /* cell in which to find volume */ + struct afs_volume *volume; /* volume record */ + struct key *key; /* key to use for secure mounting */ +}; /* - * debug tracing + * definition of how to wait for the completion of an operation */ -#define kenter(FMT, a...) printk("==> %s("FMT")\n",__FUNCTION__ , ## a) -#define kleave(FMT, a...) printk("<== %s()"FMT"\n",__FUNCTION__ , ## a) -#define kdebug(FMT, a...) printk(FMT"\n" , ## a) -#define kproto(FMT, a...) printk("### "FMT"\n" , ## a) -#define knet(FMT, a...) printk(FMT"\n" , ## a) - -#ifdef __KDEBUG -#define _enter(FMT, a...) kenter(FMT , ## a) -#define _leave(FMT, a...) kleave(FMT , ## a) -#define _debug(FMT, a...) kdebug(FMT , ## a) -#define _proto(FMT, a...) kproto(FMT , ## a) -#define _net(FMT, a...) knet(FMT , ## a) -#else -#define _enter(FMT, a...) do { } while(0) -#define _leave(FMT, a...) do { } while(0) -#define _debug(FMT, a...) do { } while(0) -#define _proto(FMT, a...) do { } while(0) -#define _net(FMT, a...) do { } while(0) -#endif +struct afs_wait_mode { + /* RxRPC received message notification */ + void (*rx_wakeup)(struct afs_call *call); -static inline void afs_discard_my_signals(void) -{ - while (signal_pending(current)) { - siginfo_t sinfo; + /* synchronous call waiter and call dispatched notification */ + int (*wait)(struct afs_call *call); + + /* asynchronous call completion */ + void (*async_complete)(void *reply, int error); +}; + +extern const struct afs_wait_mode afs_sync_call; +extern const struct afs_wait_mode afs_async_call; - spin_lock_irq(¤t->sighand->siglock); - dequeue_signal(current,¤t->blocked, &sinfo); - spin_unlock_irq(¤t->sighand->siglock); - } +/* + * a record of an in-progress RxRPC call + */ +struct afs_call { + const struct afs_call_type *type; /* type of call */ + const struct afs_wait_mode *wait_mode; /* completion wait mode */ + wait_queue_head_t waitq; /* processes awaiting completion */ + struct work_struct async_work; /* asynchronous work processor */ + struct work_struct work; /* actual work processor */ + struct sk_buff_head rx_queue; /* received packets */ + struct rxrpc_call *rxcall; /* RxRPC call handle */ + struct key *key; /* security for this call */ + struct afs_server *server; /* server affected by incoming CM call */ + void *request; /* request data (first part) */ + void *request2; /* request data (second part) */ + void *buffer; /* reply receive buffer */ + void *reply; /* reply buffer (first part) */ + void *reply2; /* reply buffer (second part) */ + void *reply3; /* reply buffer (third part) */ + void *reply4; /* reply buffer (fourth part) */ + enum { /* call state */ + AFS_CALL_REQUESTING, /* request is being sent for outgoing call */ + AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */ + AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */ + AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */ + AFS_CALL_REPLYING, /* replying to incoming call */ + AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */ + AFS_CALL_COMPLETE, /* successfully completed */ + AFS_CALL_BUSY, /* server was busy */ + AFS_CALL_ABORTED, /* call was aborted */ + AFS_CALL_ERROR, /* call failed due to error */ + } state; + int error; /* error code */ + unsigned request_size; /* size of request data */ + unsigned reply_max; /* maximum size of reply */ + unsigned reply_size; /* current size of reply */ + unsigned short offset; /* offset into received data store */ + unsigned char unmarshall; /* unmarshalling phase */ + bool incoming; /* T if incoming call */ + u16 service_id; /* RxRPC service ID to call */ + __be16 port; /* target UDP port */ + __be32 operation_ID; /* operation ID for an incoming call */ + u32 count; /* count for use in unmarshalling */ + __be32 tmp; /* place to extract temporary data */ +}; + +struct afs_call_type { + const char *name; + + /* deliver request or reply data to an call + * - returning an error will cause the call to be aborted + */ + int (*deliver)(struct afs_call *call, struct sk_buff *skb, + bool last); + + /* map an abort code to an error number */ + int (*abort_to_error)(u32 abort_code); + + /* clean up a call */ + void (*destructor)(struct afs_call *call); +}; + +/* + * AFS superblock private data + * - there's one superblock per volume + */ +struct afs_super_info { + struct afs_volume *volume; /* volume record */ + char rwparent; /* T if parent is R/W AFS volume */ +}; + +static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) +{ + return sb->s_fs_info; } +extern struct file_system_type afs_fs_type; + +/* + * entry in the cached cell catalogue + */ +struct afs_cache_cell { + char name[AFS_MAXCELLNAME]; /* cell name (padded with NULs) */ + struct in_addr vl_servers[15]; /* cached cell VL servers */ +}; + +/* + * AFS cell record + */ +struct afs_cell { + atomic_t usage; + struct list_head link; /* main cell list link */ + struct key *anonymous_key; /* anonymous user key for this cell */ + struct list_head proc_link; /* /proc cell list link */ + struct proc_dir_entry *proc_dir; /* /proc dir for this cell */ +#ifdef AFS_CACHING_SUPPORT + struct cachefs_cookie *cache; /* caching cookie */ +#endif + + /* server record management */ + rwlock_t servers_lock; /* active server list lock */ + struct list_head servers; /* active server list */ + + /* volume location record management */ + struct rw_semaphore vl_sem; /* volume management serialisation semaphore */ + struct list_head vl_list; /* cell's active VL record list */ + spinlock_t vl_lock; /* vl_list lock */ + unsigned short vl_naddrs; /* number of VL servers in addr list */ + unsigned short vl_curr_svix; /* current server index */ + struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */ + + char name[0]; /* cell name - must go last */ +}; + +/* + * entry in the cached volume location catalogue + */ +struct afs_cache_vlocation { + /* volume name (lowercase, padded with NULs) */ + uint8_t name[AFS_MAXVOLNAME + 1]; + + uint8_t nservers; /* number of entries used in servers[] */ + uint8_t vidmask; /* voltype mask for vid[] */ + uint8_t srvtmask[8]; /* voltype masks for servers[] */ +#define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ +#define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ +#define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ + + afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */ + struct in_addr servers[8]; /* fileserver addresses */ + time_t rtime; /* last retrieval time */ +}; + +/* + * volume -> vnode hash table entry + */ +struct afs_cache_vhash { + afs_voltype_t vtype; /* which volume variation */ + uint8_t hash_bucket; /* which hash bucket this represents */ +} __attribute__((packed)); + +/* + * AFS volume location record + */ +struct afs_vlocation { + atomic_t usage; + time_t time_of_death; /* time at which put reduced usage to 0 */ + struct list_head link; /* link in cell volume location list */ + struct list_head grave; /* link in master graveyard list */ + struct list_head update; /* link in master update list */ + struct afs_cell *cell; /* cell to which volume belongs */ +#ifdef AFS_CACHING_SUPPORT + struct cachefs_cookie *cache; /* caching cookie */ +#endif + struct afs_cache_vlocation vldb; /* volume information DB record */ + struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ + wait_queue_head_t waitq; /* status change waitqueue */ + time_t update_at; /* time at which record should be updated */ + spinlock_t lock; /* access lock */ + afs_vlocation_state_t state; /* volume location state */ + unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ + unsigned short upd_busy_cnt; /* EBUSY count during update */ + bool valid; /* T if valid */ +}; + +/* + * AFS fileserver record + */ +struct afs_server { + atomic_t usage; + time_t time_of_death; /* time at which put reduced usage to 0 */ + struct in_addr addr; /* server address */ + struct afs_cell *cell; /* cell in which server resides */ + struct list_head link; /* link in cell's server list */ + struct list_head grave; /* link in master graveyard list */ + struct rb_node master_rb; /* link in master by-addr tree */ + struct rw_semaphore sem; /* access lock */ + + /* file service access */ + struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */ + unsigned long fs_act_jif; /* time at which last activity occurred */ + unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ + spinlock_t fs_lock; /* access lock */ + int fs_state; /* 0 or reason FS currently marked dead (-errno) */ + + /* callback promise management */ + struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */ + struct delayed_work cb_updater; /* callback updater */ + struct delayed_work cb_break_work; /* collected break dispatcher */ + wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */ + spinlock_t cb_lock; /* access lock */ + struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */ + atomic_t cb_break_n; /* number of pending breaks */ + u8 cb_break_head; /* head of callback breaking ring */ + u8 cb_break_tail; /* tail of callback breaking ring */ +}; + +/* + * AFS volume access record + */ +struct afs_volume { + atomic_t usage; + struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */ + struct afs_vlocation *vlocation; /* volume location */ +#ifdef AFS_CACHING_SUPPORT + struct cachefs_cookie *cache; /* caching cookie */ +#endif + afs_volid_t vid; /* volume ID */ + afs_voltype_t type; /* type of volume */ + char type_force; /* force volume type (suppress R/O -> R/W) */ + unsigned short nservers; /* number of server slots filled */ + unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */ + struct afs_server *servers[8]; /* servers on which volume resides (ordered) */ + struct rw_semaphore server_sem; /* lock for accessing current server */ +}; + +/* + * vnode catalogue entry + */ +struct afs_cache_vnode { + afs_vnodeid_t vnode_id; /* vnode ID */ + unsigned vnode_unique; /* vnode ID uniquifier */ + afs_dataversion_t data_version; /* data version */ +}; + +/* + * AFS inode private data + */ +struct afs_vnode { + struct inode vfs_inode; /* the VFS's inode record */ + + struct afs_volume *volume; /* volume on which vnode resides */ + struct afs_server *server; /* server currently supplying this file */ + struct afs_fid fid; /* the file identifier for this inode */ + struct afs_file_status status; /* AFS status info for this file */ +#ifdef AFS_CACHING_SUPPORT + struct cachefs_cookie *cache; /* caching cookie */ +#endif + struct afs_permits *permits; /* cache of permits so far obtained */ + struct mutex permits_lock; /* lock for altering permits list */ + struct mutex validate_lock; /* lock for validating this vnode */ + wait_queue_head_t update_waitq; /* status fetch waitqueue */ + int update_cnt; /* number of outstanding ops that will update the + * status */ + spinlock_t lock; /* waitqueue/flags lock */ + unsigned long flags; +#define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */ +#define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ +#define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */ +#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 */ + + long acl_order; /* ACL check count (callback break count) */ + + /* outstanding callback notification on this file */ + struct rb_node server_rb; /* link in server->fs_vnodes */ + struct rb_node cb_promise; /* link in server->cb_promises */ + struct work_struct cb_broken_work; /* work to be done on callback break */ + time_t cb_expires; /* time at which callback expires */ + time_t cb_expires_at; /* time used to order cb_promise */ + unsigned cb_version; /* callback version */ + unsigned cb_expiry; /* callback expiry time */ + afs_callback_type_t cb_type; /* type of callback */ + bool cb_promised; /* true if promise still holds */ +}; + +/* + * cached security record for one user's attempt to access a vnode + */ +struct afs_permit { + struct key *key; /* RxRPC ticket holding a security context */ + afs_access_t access_mask; /* access mask for this key */ +}; + +/* + * cache of security records from attempts to access a vnode + */ +struct afs_permits { + struct rcu_head rcu; /* disposal procedure */ + int count; /* number of records */ + struct afs_permit permits[0]; /* the permits so far examined */ +}; + +/* + * record of one of a system's set of network interfaces + */ +struct afs_interface { + unsigned index; /* interface index */ + struct in_addr address; /* IPv4 address bound to interface */ + struct in_addr netmask; /* netmask applied to address */ + unsigned mtu; /* MTU of interface */ +}; + +/* + * UUID definition [internet draft] + * - the timestamp is a 60-bit value, split 32/16/12, and goes in 100ns + * increments since midnight 15th October 1582 + * - add AFS_UUID_TO_UNIX_TIME to convert unix time in 100ns units to UUID + * time + * - the clock sequence is a 14-bit counter to avoid duplicate times + */ +struct afs_uuid { + u32 time_low; /* low part of timestamp */ + u16 time_mid; /* mid part of timestamp */ + u16 time_hi_and_version; /* high part of timestamp and version */ +#define AFS_UUID_TO_UNIX_TIME 0x01b21dd213814000 +#define AFS_UUID_TIMEHI_MASK 0x0fff +#define AFS_UUID_VERSION_TIME 0x1000 /* time-based UUID */ +#define AFS_UUID_VERSION_NAME 0x3000 /* name-based UUID */ +#define AFS_UUID_VERSION_RANDOM 0x4000 /* (pseudo-)random generated UUID */ + u8 clock_seq_hi_and_reserved; /* clock seq hi and variant */ +#define AFS_UUID_CLOCKHI_MASK 0x3f +#define AFS_UUID_VARIANT_STD 0x80 + u8 clock_seq_low; /* clock seq low */ + u8 node[6]; /* spatially unique node ID (MAC addr) */ +}; + +/*****************************************************************************/ +/* + * callback.c + */ +extern void afs_init_callback_state(struct afs_server *); +extern void afs_broken_callback_work(struct work_struct *); +extern void afs_break_callbacks(struct afs_server *, size_t, + struct afs_callback[]); +extern void afs_discard_callback_on_delete(struct afs_vnode *); +extern void afs_give_up_callback(struct afs_vnode *); +extern void afs_dispatch_give_up_callbacks(struct work_struct *); +extern void afs_flush_callback_breaks(struct afs_server *); +extern int __init afs_callback_update_init(void); +extern void __exit afs_callback_update_kill(void); + /* * cell.c */ @@ -60,57 +403,156 @@ extern struct list_head afs_proc_cells; extern struct cachefs_index_def afs_cache_cell_index_def; #endif +#define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0) +extern int afs_cell_init(char *); +extern struct afs_cell *afs_cell_create(const char *, char *); +extern struct afs_cell *afs_cell_lookup(const char *, unsigned); +extern struct afs_cell *afs_grab_cell(struct afs_cell *); +extern void afs_put_cell(struct afs_cell *); +extern void afs_cell_purge(void); + +/* + * cmservice.c + */ +extern bool afs_cm_incoming_call(struct afs_call *); + /* * dir.c */ extern const struct inode_operations afs_dir_inode_operations; extern const struct file_operations afs_dir_file_operations; +extern int afs_permission(struct inode *, int, struct nameidata *); + /* * file.c */ extern const struct address_space_operations afs_fs_aops; extern const struct inode_operations afs_file_inode_operations; +extern const struct file_operations afs_file_operations; + +extern int afs_open(struct inode *, struct file *); +extern int afs_release(struct inode *, struct file *); #ifdef AFS_CACHING_SUPPORT -extern int afs_cache_get_page_cookie(struct page *page, - struct cachefs_page **_page_cookie); +extern int afs_cache_get_page_cookie(struct page *, struct cachefs_page **); #endif /* - * inode.c + * fsclient.c */ -extern int afs_iget(struct super_block *sb, struct afs_fid *fid, - struct inode **_inode); -extern int afs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry, - struct kstat *stat); -extern void afs_clear_inode(struct inode *inode); +extern int afs_fs_fetch_file_status(struct afs_server *, struct key *, + struct afs_vnode *, struct afs_volsync *, + const struct afs_wait_mode *); +extern int afs_fs_give_up_callbacks(struct afs_server *, + const struct afs_wait_mode *); +extern int afs_fs_fetch_data(struct afs_server *, struct key *, + struct afs_vnode *, off_t, size_t, struct page *, + const struct afs_wait_mode *); +extern int afs_fs_create(struct afs_server *, struct key *, + struct afs_vnode *, const char *, umode_t, + struct afs_fid *, struct afs_file_status *, + struct afs_callback *, + const struct afs_wait_mode *); +extern int afs_fs_remove(struct afs_server *, struct key *, + struct afs_vnode *, const char *, bool, + const struct afs_wait_mode *); +extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *, + struct afs_vnode *, const char *, + const struct afs_wait_mode *); +extern int afs_fs_symlink(struct afs_server *, struct key *, + struct afs_vnode *, const char *, const char *, + struct afs_fid *, struct afs_file_status *, + const struct afs_wait_mode *); +extern int afs_fs_rename(struct afs_server *, struct key *, + struct afs_vnode *, const char *, + struct afs_vnode *, const char *, + const struct afs_wait_mode *); /* - * key_afs.c + * inode.c */ -#ifdef CONFIG_KEYS -extern int afs_key_register(void); -extern void afs_key_unregister(void); -#endif +extern struct inode *afs_iget(struct super_block *, struct key *, + struct afs_fid *, struct afs_file_status *, + struct afs_callback *); +extern int afs_validate(struct afs_vnode *, struct key *); +extern int afs_inode_getattr(struct vfsmount *, struct dentry *, + struct kstat *); +extern void afs_zap_permits(struct rcu_head *); +extern void afs_clear_inode(struct inode *); /* * main.c */ +extern struct afs_uuid afs_uuid; #ifdef AFS_CACHING_SUPPORT extern struct cachefs_netfs afs_cache_netfs; #endif /* + * misc.c + */ +extern int afs_abort_to_error(u32); + +/* * mntpt.c */ extern const struct inode_operations afs_mntpt_inode_operations; extern const struct file_operations afs_mntpt_file_operations; -extern struct afs_timer afs_mntpt_expiry_timer; -extern struct afs_timer_ops afs_mntpt_expiry_timer_ops; extern unsigned long afs_mntpt_expiry_timeout; -extern int afs_mntpt_check_symlink(struct afs_vnode *vnode); +extern int afs_mntpt_check_symlink(struct afs_vnode *, struct key *); +extern void afs_mntpt_kill_timer(void); +extern void afs_umount_begin(struct vfsmount *, int); + +/* + * proc.c + */ +extern int afs_proc_init(void); +extern void afs_proc_cleanup(void); +extern int afs_proc_cell_setup(struct afs_cell *); +extern void afs_proc_cell_remove(struct afs_cell *); + +/* + * rxrpc.c + */ +extern int afs_open_socket(void); +extern void afs_close_socket(void); +extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t, + const struct afs_wait_mode *); +extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *, + size_t, size_t); +extern void afs_flat_call_destructor(struct afs_call *); +extern void afs_transfer_reply(struct afs_call *, struct sk_buff *); +extern void afs_send_empty_reply(struct afs_call *); +extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); +extern int afs_extract_data(struct afs_call *, struct sk_buff *, bool, void *, + size_t); + +/* + * security.c + */ +extern void afs_clear_permits(struct afs_vnode *); +extern void afs_cache_permit(struct afs_vnode *, struct key *, long); +extern struct key *afs_request_key(struct afs_cell *); +extern int afs_permission(struct inode *, int, struct nameidata *); + +/* + * server.c + */ +extern spinlock_t afs_server_peer_lock; + +#define afs_get_server(S) \ +do { \ + _debug("GET SERVER %d", atomic_read(&(S)->usage)); \ + atomic_inc(&(S)->usage); \ +} while(0) + +extern struct afs_server *afs_lookup_server(struct afs_cell *, + const struct in_addr *); +extern struct afs_server *afs_find_server(const struct in_addr *); +extern void afs_put_server(struct afs_server *); +extern void __exit afs_purge_servers(void); /* * super.c @@ -118,22 +560,211 @@ extern int afs_mntpt_check_symlink(struct afs_vnode *vnode); extern int afs_fs_init(void); extern void afs_fs_exit(void); -#define AFS_CB_HASH_COUNT (PAGE_SIZE / sizeof(struct list_head)) +/* + * use-rtnetlink.c + */ +extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); +extern int afs_get_MAC_address(u8 [6]); -extern struct list_head afs_cb_hash_tbl[]; -extern spinlock_t afs_cb_hash_lock; +/* + * vlclient.c + */ +#ifdef AFS_CACHING_SUPPORT +extern struct cachefs_index_def afs_vlocation_cache_index_def; +#endif -#define afs_cb_hash(SRV,FID) \ - afs_cb_hash_tbl[((unsigned long)(SRV) + \ - (FID)->vid + (FID)->vnode + (FID)->unique) % \ - AFS_CB_HASH_COUNT] +extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *, + const char *, struct afs_cache_vlocation *, + const struct afs_wait_mode *); +extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *, + afs_volid_t, afs_voltype_t, + struct afs_cache_vlocation *, + const struct afs_wait_mode *); /* - * proc.c + * vlocation.c */ -extern int afs_proc_init(void); -extern void afs_proc_cleanup(void); -extern int afs_proc_cell_setup(struct afs_cell *cell); -extern void afs_proc_cell_remove(struct afs_cell *cell); +#define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0) + +extern int __init afs_vlocation_update_init(void); +extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *, + struct key *, + const char *, size_t); +extern void afs_put_vlocation(struct afs_vlocation *); +extern void __exit afs_vlocation_purge(void); + +/* + * vnode.c + */ +#ifdef AFS_CACHING_SUPPORT +extern struct cachefs_index_def afs_vnode_cache_index_def; +#endif + +extern struct afs_timer_ops afs_vnode_cb_timed_out_ops; + +static inline struct afs_vnode *AFS_FS_I(struct inode *inode) +{ + return container_of(inode, struct afs_vnode, vfs_inode); +} + +static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) +{ + return &vnode->vfs_inode; +} + +extern void afs_vnode_finalise_status_update(struct afs_vnode *, + struct afs_server *); +extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *, + struct key *); +extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *, + off_t, size_t, struct page *); +extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *, + umode_t, struct afs_fid *, struct afs_file_status *, + struct afs_callback *, struct afs_server **); +extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *, + bool); +extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *, + const char *); +extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *, + const char *, struct afs_fid *, + struct afs_file_status *, struct afs_server **); +extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *, + struct key *, const char *, const char *); + +/* + * volume.c + */ +#ifdef AFS_CACHING_SUPPORT +extern struct cachefs_index_def afs_volume_cache_index_def; +#endif + +#define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0) + +extern void afs_put_volume(struct afs_volume *); +extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *); +extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *); +extern int afs_volume_release_fileserver(struct afs_vnode *, + struct afs_server *, int); + +/*****************************************************************************/ +/* + * debug tracing + */ +extern unsigned afs_debug; + +#define dbgprintk(FMT,...) \ + printk("[%x%-6.6s] "FMT"\n", smp_processor_id(), current->comm ,##__VA_ARGS__) + +/* make sure we maintain the format strings, even when debugging is disabled */ +static inline __attribute__((format(printf,1,2))) +void _dbprintk(const char *fmt, ...) +{ +} + +#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__) +#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__) +#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) + + +#if defined(__KDEBUG) +#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) +#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) +#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) + +#elif defined(CONFIG_AFS_DEBUG) +#define AFS_DEBUG_KENTER 0x01 +#define AFS_DEBUG_KLEAVE 0x02 +#define AFS_DEBUG_KDEBUG 0x04 + +#define _enter(FMT,...) \ +do { \ + if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ + kenter(FMT,##__VA_ARGS__); \ +} while (0) + +#define _leave(FMT,...) \ +do { \ + if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ + kleave(FMT,##__VA_ARGS__); \ +} while (0) + +#define _debug(FMT,...) \ +do { \ + if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ + kdebug(FMT,##__VA_ARGS__); \ +} while (0) + +#else +#define _enter(FMT,...) _dbprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__) +#define _leave(FMT,...) _dbprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__) +#define _debug(FMT,...) _dbprintk(" "FMT ,##__VA_ARGS__) +#endif + +/* + * debug assertion checking + */ +#if 1 // defined(__KDEBUGALL) + +#define ASSERT(X) \ +do { \ + if (unlikely(!(X))) { \ + printk(KERN_ERR "\n"); \ + printk(KERN_ERR "AFS: Assertion failed\n"); \ + BUG(); \ + } \ +} while(0) + +#define ASSERTCMP(X, OP, Y) \ +do { \ + if (unlikely(!((X) OP (Y)))) { \ + printk(KERN_ERR "\n"); \ + printk(KERN_ERR "AFS: Assertion failed\n"); \ + printk(KERN_ERR "%lu " #OP " %lu is false\n", \ + (unsigned long)(X), (unsigned long)(Y)); \ + printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ + (unsigned long)(X), (unsigned long)(Y)); \ + BUG(); \ + } \ +} while(0) + +#define ASSERTIF(C, X) \ +do { \ + if (unlikely((C) && !(X))) { \ + printk(KERN_ERR "\n"); \ + printk(KERN_ERR "AFS: Assertion failed\n"); \ + BUG(); \ + } \ +} while(0) + +#define ASSERTIFCMP(C, X, OP, Y) \ +do { \ + if (unlikely((C) && !((X) OP (Y)))) { \ + printk(KERN_ERR "\n"); \ + printk(KERN_ERR "AFS: Assertion failed\n"); \ + printk(KERN_ERR "%lu " #OP " %lu is false\n", \ + (unsigned long)(X), (unsigned long)(Y)); \ + printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ + (unsigned long)(X), (unsigned long)(Y)); \ + BUG(); \ + } \ +} while(0) + +#else + +#define ASSERT(X) \ +do { \ +} while(0) + +#define ASSERTCMP(X, OP, Y) \ +do { \ +} while(0) + +#define ASSERTIF(C, X) \ +do { \ +} while(0) + +#define ASSERTIFCMP(C, X, OP, Y) \ +do { \ +} while(0) -#endif /* AFS_INTERNAL_H */ +#endif /* __KDEBUGALL */ diff --git a/fs/afs/kafsasyncd.c b/fs/afs/kafsasyncd.c deleted file mode 100644 index 615df24..0000000 --- a/fs/afs/kafsasyncd.c +++ /dev/null @@ -1,255 +0,0 @@ -/* kafsasyncd.c: AFS asynchronous operation daemon - * - * Copyright (C) 2002 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. - * - * - * The AFS async daemon is used to the following: - * - probe "dead" servers to see whether they've come back to life yet. - * - probe "live" servers that we haven't talked to for a while to see if they are better - * candidates for serving than what we're currently using - * - poll volume location servers to keep up to date volume location lists - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/completion.h> -#include <linux/freezer.h> -#include "cell.h" -#include "server.h" -#include "volume.h" -#include "kafsasyncd.h" -#include "kafstimod.h" -#include <rxrpc/call.h> -#include <asm/errno.h> -#include "internal.h" - -static DECLARE_COMPLETION(kafsasyncd_alive); -static DECLARE_COMPLETION(kafsasyncd_dead); -static DECLARE_WAIT_QUEUE_HEAD(kafsasyncd_sleepq); -static struct task_struct *kafsasyncd_task; -static int kafsasyncd_die; - -static int kafsasyncd(void *arg); - -static LIST_HEAD(kafsasyncd_async_attnq); -static LIST_HEAD(kafsasyncd_async_busyq); -static DEFINE_SPINLOCK(kafsasyncd_async_lock); - -static void kafsasyncd_null_call_attn_func(struct rxrpc_call *call) -{ -} - -static void kafsasyncd_null_call_error_func(struct rxrpc_call *call) -{ -} - -/*****************************************************************************/ -/* - * start the async daemon - */ -int afs_kafsasyncd_start(void) -{ - int ret; - - ret = kernel_thread(kafsasyncd, NULL, 0); - if (ret < 0) - return ret; - - wait_for_completion(&kafsasyncd_alive); - - return ret; -} /* end afs_kafsasyncd_start() */ - -/*****************************************************************************/ -/* - * stop the async daemon - */ -void afs_kafsasyncd_stop(void) -{ - /* get rid of my daemon */ - kafsasyncd_die = 1; - wake_up(&kafsasyncd_sleepq); - wait_for_completion(&kafsasyncd_dead); - -} /* end afs_kafsasyncd_stop() */ - -/*****************************************************************************/ -/* - * probing daemon - */ -static int kafsasyncd(void *arg) -{ - struct afs_async_op *op; - int die; - - DECLARE_WAITQUEUE(myself, current); - - kafsasyncd_task = current; - - printk("kAFS: Started kafsasyncd %d\n", current->pid); - - daemonize("kafsasyncd"); - - complete(&kafsasyncd_alive); - - /* loop around looking for things to attend to */ - do { - set_current_state(TASK_INTERRUPTIBLE); - add_wait_queue(&kafsasyncd_sleepq, &myself); - - for (;;) { - if (!list_empty(&kafsasyncd_async_attnq) || - signal_pending(current) || - kafsasyncd_die) - break; - - schedule(); - set_current_state(TASK_INTERRUPTIBLE); - } - - remove_wait_queue(&kafsasyncd_sleepq, &myself); - set_current_state(TASK_RUNNING); - - try_to_freeze(); - - /* discard pending signals */ - afs_discard_my_signals(); - - die = kafsasyncd_die; - - /* deal with the next asynchronous operation requiring - * attention */ - if (!list_empty(&kafsasyncd_async_attnq)) { - struct afs_async_op *op; - - _debug("@@@ Begin Asynchronous Operation"); - - op = NULL; - spin_lock(&kafsasyncd_async_lock); - - if (!list_empty(&kafsasyncd_async_attnq)) { - op = list_entry(kafsasyncd_async_attnq.next, - struct afs_async_op, link); - list_move_tail(&op->link, - &kafsasyncd_async_busyq); - } - - spin_unlock(&kafsasyncd_async_lock); - - _debug("@@@ Operation %p {%p}\n", - op, op ? op->ops : NULL); - - if (op) - op->ops->attend(op); - - _debug("@@@ End Asynchronous Operation"); - } - - } while(!die); - - /* need to kill all outstanding asynchronous operations before - * exiting */ - kafsasyncd_task = NULL; - spin_lock(&kafsasyncd_async_lock); - - /* fold the busy and attention queues together */ - list_splice_init(&kafsasyncd_async_busyq, - &kafsasyncd_async_attnq); - - /* dequeue kafsasyncd from all their wait queues */ - list_for_each_entry(op, &kafsasyncd_async_attnq, link) { - op->call->app_attn_func = kafsasyncd_null_call_attn_func; - op->call->app_error_func = kafsasyncd_null_call_error_func; - remove_wait_queue(&op->call->waitq, &op->waiter); - } - - spin_unlock(&kafsasyncd_async_lock); - - /* abort all the operations */ - while (!list_empty(&kafsasyncd_async_attnq)) { - op = list_entry(kafsasyncd_async_attnq.next, struct afs_async_op, link); - list_del_init(&op->link); - - rxrpc_call_abort(op->call, -EIO); - rxrpc_put_call(op->call); - op->call = NULL; - - op->ops->discard(op); - } - - /* and that's all */ - _leave(""); - complete_and_exit(&kafsasyncd_dead, 0); - -} /* end kafsasyncd() */ - -/*****************************************************************************/ -/* - * begin an operation - * - place operation on busy queue - */ -void afs_kafsasyncd_begin_op(struct afs_async_op *op) -{ - _enter(""); - - spin_lock(&kafsasyncd_async_lock); - - init_waitqueue_entry(&op->waiter, kafsasyncd_task); - add_wait_queue(&op->call->waitq, &op->waiter); - - list_move_tail(&op->link, &kafsasyncd_async_busyq); - - spin_unlock(&kafsasyncd_async_lock); - - _leave(""); -} /* end afs_kafsasyncd_begin_op() */ - -/*****************************************************************************/ -/* - * request attention for an operation - * - move to attention queue - */ -void afs_kafsasyncd_attend_op(struct afs_async_op *op) -{ - _enter(""); - - spin_lock(&kafsasyncd_async_lock); - - list_move_tail(&op->link, &kafsasyncd_async_attnq); - - spin_unlock(&kafsasyncd_async_lock); - - wake_up(&kafsasyncd_sleepq); - - _leave(""); -} /* end afs_kafsasyncd_attend_op() */ - -/*****************************************************************************/ -/* - * terminate an operation - * - remove from either queue - */ -void afs_kafsasyncd_terminate_op(struct afs_async_op *op) -{ - _enter(""); - - spin_lock(&kafsasyncd_async_lock); - - if (!list_empty(&op->link)) { - list_del_init(&op->link); - remove_wait_queue(&op->call->waitq, &op->waiter); - } - - spin_unlock(&kafsasyncd_async_lock); - - wake_up(&kafsasyncd_sleepq); - - _leave(""); -} /* end afs_kafsasyncd_terminate_op() */ diff --git a/fs/afs/kafsasyncd.h b/fs/afs/kafsasyncd.h deleted file mode 100644 index 791803f..0000000 --- a/fs/afs/kafsasyncd.h +++ /dev/null @@ -1,52 +0,0 @@ -/* kafsasyncd.h: AFS asynchronous operation daemon - * - * Copyright (C) 2002 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. - */ - -#ifndef _LINUX_AFS_KAFSASYNCD_H -#define _LINUX_AFS_KAFSASYNCD_H - -#include "types.h" - -struct afs_async_op; - -struct afs_async_op_ops { - void (*attend)(struct afs_async_op *op); - void (*discard)(struct afs_async_op *op); -}; - -/*****************************************************************************/ -/* - * asynchronous operation record - */ -struct afs_async_op -{ - struct list_head link; - struct afs_server *server; /* server being contacted */ - struct rxrpc_call *call; /* RxRPC call performing op */ - wait_queue_t waiter; /* wait queue for kafsasyncd */ - const struct afs_async_op_ops *ops; /* operations */ -}; - -static inline void afs_async_op_init(struct afs_async_op *op, - const struct afs_async_op_ops *ops) -{ - INIT_LIST_HEAD(&op->link); - op->call = NULL; - op->ops = ops; -} - -extern int afs_kafsasyncd_start(void); -extern void afs_kafsasyncd_stop(void); - -extern void afs_kafsasyncd_begin_op(struct afs_async_op *op); -extern void afs_kafsasyncd_attend_op(struct afs_async_op *op); -extern void afs_kafsasyncd_terminate_op(struct afs_async_op *op); - -#endif /* _LINUX_AFS_KAFSASYNCD_H */ diff --git a/fs/afs/kafstimod.c b/fs/afs/kafstimod.c deleted file mode 100644 index 694344e..0000000 --- a/fs/afs/kafstimod.c +++ /dev/null @@ -1,205 +0,0 @@ -/* kafstimod.c: AFS timeout daemon - * - * Copyright (C) 2002 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/module.h> -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/completion.h> -#include <linux/freezer.h> -#include "cell.h" -#include "volume.h" -#include "kafstimod.h" -#include <asm/errno.h> -#include "internal.h" - -static DECLARE_COMPLETION(kafstimod_alive); -static DECLARE_COMPLETION(kafstimod_dead); -static DECLARE_WAIT_QUEUE_HEAD(kafstimod_sleepq); -static int kafstimod_die; - -static LIST_HEAD(kafstimod_list); -static DEFINE_SPINLOCK(kafstimod_lock); - -static int kafstimod(void *arg); - -/*****************************************************************************/ -/* - * start the timeout daemon - */ -int afs_kafstimod_start(void) -{ - int ret; - - ret = kernel_thread(kafstimod, NULL, 0); - if (ret < 0) - return ret; - - wait_for_completion(&kafstimod_alive); - - return ret; -} /* end afs_kafstimod_start() */ - -/*****************************************************************************/ -/* - * stop the timeout daemon - */ -void afs_kafstimod_stop(void) -{ - /* get rid of my daemon */ - kafstimod_die = 1; - wake_up(&kafstimod_sleepq); - wait_for_completion(&kafstimod_dead); - -} /* end afs_kafstimod_stop() */ - -/*****************************************************************************/ -/* - * timeout processing daemon - */ -static int kafstimod(void *arg) -{ - struct afs_timer *timer; - - DECLARE_WAITQUEUE(myself, current); - - printk("kAFS: Started kafstimod %d\n", current->pid); - - daemonize("kafstimod"); - - complete(&kafstimod_alive); - - /* loop around looking for things to attend to */ - loop: - set_current_state(TASK_INTERRUPTIBLE); - add_wait_queue(&kafstimod_sleepq, &myself); - - for (;;) { - unsigned long jif; - signed long timeout; - - /* deal with the server being asked to die */ - if (kafstimod_die) { - remove_wait_queue(&kafstimod_sleepq, &myself); - _leave(""); - complete_and_exit(&kafstimod_dead, 0); - } - - try_to_freeze(); - - /* discard pending signals */ - afs_discard_my_signals(); - - /* work out the time to elapse before the next event */ - spin_lock(&kafstimod_lock); - if (list_empty(&kafstimod_list)) { - timeout = MAX_SCHEDULE_TIMEOUT; - } - else { - timer = list_entry(kafstimod_list.next, - struct afs_timer, link); - timeout = timer->timo_jif; - jif = jiffies; - - if (time_before_eq((unsigned long) timeout, jif)) - goto immediate; - - else { - timeout = (long) timeout - (long) jiffies; - } - } - spin_unlock(&kafstimod_lock); - - schedule_timeout(timeout); - - set_current_state(TASK_INTERRUPTIBLE); - } - - /* the thing on the front of the queue needs processing - * - we come here with the lock held and timer pointing to the expired - * entry - */ - immediate: - remove_wait_queue(&kafstimod_sleepq, &myself); - set_current_state(TASK_RUNNING); - - _debug("@@@ Begin Timeout of %p", timer); - - /* dequeue the timer */ - list_del_init(&timer->link); - spin_unlock(&kafstimod_lock); - - /* call the timeout function */ - timer->ops->timed_out(timer); - - _debug("@@@ End Timeout"); - goto loop; - -} /* end kafstimod() */ - -/*****************************************************************************/ -/* - * (re-)queue a timer - */ -void afs_kafstimod_add_timer(struct afs_timer *timer, unsigned long timeout) -{ - struct afs_timer *ptimer; - struct list_head *_p; - - _enter("%p,%lu", timer, timeout); - - spin_lock(&kafstimod_lock); - - list_del(&timer->link); - - /* the timer was deferred or reset - put it back in the queue at the - * right place */ - timer->timo_jif = jiffies + timeout; - - list_for_each(_p, &kafstimod_list) { - ptimer = list_entry(_p, struct afs_timer, link); - if (time_before(timer->timo_jif, ptimer->timo_jif)) - break; - } - - list_add_tail(&timer->link, _p); /* insert before stopping point */ - - spin_unlock(&kafstimod_lock); - - wake_up(&kafstimod_sleepq); - - _leave(""); -} /* end afs_kafstimod_add_timer() */ - -/*****************************************************************************/ -/* - * dequeue a timer - * - returns 0 if the timer was deleted or -ENOENT if it wasn't queued - */ -int afs_kafstimod_del_timer(struct afs_timer *timer) -{ - int ret = 0; - - _enter("%p", timer); - - spin_lock(&kafstimod_lock); - - if (list_empty(&timer->link)) - ret = -ENOENT; - else - list_del_init(&timer->link); - - spin_unlock(&kafstimod_lock); - - wake_up(&kafstimod_sleepq); - - _leave(" = %d", ret); - return ret; -} /* end afs_kafstimod_del_timer() */ diff --git a/fs/afs/kafstimod.h b/fs/afs/kafstimod.h deleted file mode 100644 index e312f1a..0000000 --- a/fs/afs/kafstimod.h +++ /dev/null @@ -1,49 +0,0 @@ -/* kafstimod.h: AFS timeout daemon - * - * Copyright (C) 2002 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. - */ - -#ifndef _LINUX_AFS_KAFSTIMOD_H -#define _LINUX_AFS_KAFSTIMOD_H - -#include "types.h" - -struct afs_timer; - -struct afs_timer_ops { - /* called when the front of the timer queue has timed out */ - void (*timed_out)(struct afs_timer *timer); -}; - -/*****************************************************************************/ -/* - * AFS timer/timeout record - */ -struct afs_timer -{ - struct list_head link; /* link in timer queue */ - unsigned long timo_jif; /* timeout time */ - const struct afs_timer_ops *ops; /* timeout expiry function */ -}; - -static inline void afs_timer_init(struct afs_timer *timer, - const struct afs_timer_ops *ops) -{ - INIT_LIST_HEAD(&timer->link); - timer->ops = ops; -} - -extern int afs_kafstimod_start(void); -extern void afs_kafstimod_stop(void); - -extern void afs_kafstimod_add_timer(struct afs_timer *timer, - unsigned long timeout); -extern int afs_kafstimod_del_timer(struct afs_timer *timer); - -#endif /* _LINUX_AFS_KAFSTIMOD_H */ diff --git a/fs/afs/main.c b/fs/afs/main.c index f2704ba..40c2704 100644 --- a/fs/afs/main.c +++ b/fs/afs/main.c @@ -1,4 +1,4 @@ -/* main.c: AFS client file system +/* AFS client file system * * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) @@ -13,43 +13,21 @@ #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/completion.h> -#include <rxrpc/rxrpc.h> -#include <rxrpc/transport.h> -#include <rxrpc/call.h> -#include <rxrpc/peer.h> -#include "cache.h" -#include "cell.h" -#include "server.h" -#include "fsclient.h" -#include "cmservice.h" -#include "kafstimod.h" -#include "kafsasyncd.h" #include "internal.h" -struct rxrpc_transport *afs_transport; - -static int afs_adding_peer(struct rxrpc_peer *peer); -static void afs_discarding_peer(struct rxrpc_peer *peer); - - MODULE_DESCRIPTION("AFS Client File System"); MODULE_AUTHOR("Red Hat, Inc."); MODULE_LICENSE("GPL"); +unsigned afs_debug; +module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO); +MODULE_PARM_DESC(afs_debug, "AFS debugging mask"); + static char *rootcell; module_param(rootcell, charp, 0); MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list"); - -static struct rxrpc_peer_ops afs_peer_ops = { - .adding = afs_adding_peer, - .discarding = afs_discarding_peer, -}; - -struct list_head afs_cb_hash_tbl[AFS_CB_HASH_COUNT]; -DEFINE_SPINLOCK(afs_cb_hash_lock); - #ifdef AFS_CACHING_SUPPORT static struct cachefs_netfs_operations afs_cache_ops = { .get_page_cookie = afs_cache_get_page_cookie, @@ -62,20 +40,63 @@ struct cachefs_netfs afs_cache_netfs = { }; #endif -/*****************************************************************************/ +struct afs_uuid afs_uuid; + +/* + * get a client UUID + */ +static int __init afs_get_client_UUID(void) +{ + struct timespec ts; + u64 uuidtime; + u16 clockseq; + int ret; + + /* read the MAC address of one of the external interfaces and construct + * a UUID from it */ + ret = afs_get_MAC_address(afs_uuid.node); + if (ret < 0) + return ret; + + getnstimeofday(&ts); + uuidtime = (u64) ts.tv_sec * 1000 * 1000 * 10; + uuidtime += ts.tv_nsec / 100; + uuidtime += AFS_UUID_TO_UNIX_TIME; + afs_uuid.time_low = uuidtime; + afs_uuid.time_mid = uuidtime >> 32; + afs_uuid.time_hi_and_version = (uuidtime >> 48) & AFS_UUID_TIMEHI_MASK; + afs_uuid.time_hi_and_version = AFS_UUID_VERSION_TIME; + + get_random_bytes(&clockseq, 2); + afs_uuid.clock_seq_low = clockseq; + afs_uuid.clock_seq_hi_and_reserved = + (clockseq >> 8) & AFS_UUID_CLOCKHI_MASK; + afs_uuid.clock_seq_hi_and_reserved = AFS_UUID_VARIANT_STD; + + _debug("AFS UUID: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", + afs_uuid.time_low, + afs_uuid.time_mid, + afs_uuid.time_hi_and_version, + afs_uuid.clock_seq_hi_and_reserved, + afs_uuid.clock_seq_low, + afs_uuid.node[0], afs_uuid.node[1], afs_uuid.node[2], + afs_uuid.node[3], afs_uuid.node[4], afs_uuid.node[5]); + + return 0; +} + /* * initialise the AFS client FS module */ static int __init afs_init(void) { - int loop, ret; + int ret; printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n"); - /* initialise the callback hash table */ - spin_lock_init(&afs_cb_hash_lock); - for (loop = AFS_CB_HASH_COUNT - 1; loop >= 0; loop--) - INIT_LIST_HEAD(&afs_cb_hash_tbl[loop]); + ret = afs_get_client_UUID(); + if (ret < 0) + return ret; /* register the /proc stuff */ ret = afs_proc_init(); @@ -87,70 +108,56 @@ static int __init afs_init(void) ret = cachefs_register_netfs(&afs_cache_netfs, &afs_cache_cell_index_def); if (ret < 0) - goto error; -#endif - -#ifdef CONFIG_KEYS_TURNED_OFF - ret = afs_key_register(); - if (ret < 0) goto error_cache; #endif /* initialise the cell DB */ ret = afs_cell_init(rootcell); if (ret < 0) - goto error_keys; + goto error_cell_init; - /* start the timeout daemon */ - ret = afs_kafstimod_start(); + /* initialise the VL update process */ + ret = afs_vlocation_update_init(); if (ret < 0) - goto error_keys; + goto error_vl_update_init; - /* start the async operation daemon */ - ret = afs_kafsasyncd_start(); - if (ret < 0) - goto error_kafstimod; + /* initialise the callback update process */ + ret = afs_callback_update_init(); /* create the RxRPC transport */ - ret = rxrpc_create_transport(7001, &afs_transport); + ret = afs_open_socket(); if (ret < 0) - goto error_kafsasyncd; - - afs_transport->peer_ops = &afs_peer_ops; + goto error_open_socket; /* register the filesystems */ ret = afs_fs_init(); if (ret < 0) - goto error_transport; + goto error_fs; return ret; - error_transport: - rxrpc_put_transport(afs_transport); - error_kafsasyncd: - afs_kafsasyncd_stop(); - error_kafstimod: - afs_kafstimod_stop(); - error_keys: -#ifdef CONFIG_KEYS_TURNED_OFF - afs_key_unregister(); - error_cache: -#endif +error_fs: + afs_close_socket(); +error_open_socket: +error_vl_update_init: +error_cell_init: #ifdef AFS_CACHING_SUPPORT cachefs_unregister_netfs(&afs_cache_netfs); - error: +error_cache: #endif + afs_callback_update_kill(); + afs_vlocation_purge(); afs_cell_purge(); afs_proc_cleanup(); printk(KERN_ERR "kAFS: failed to register: %d\n", ret); return ret; -} /* end afs_init() */ +} /* XXX late_initcall is kludgy, but the only alternative seems to create * a transport upon the first mount, which is worse. Or is it? */ late_initcall(afs_init); /* must be called after net/ to create socket */ -/*****************************************************************************/ + /* * clean up on module removal */ @@ -159,127 +166,16 @@ static void __exit afs_exit(void) printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n"); afs_fs_exit(); - rxrpc_put_transport(afs_transport); - afs_kafstimod_stop(); - afs_kafsasyncd_stop(); + afs_close_socket(); + afs_purge_servers(); + afs_callback_update_kill(); + afs_vlocation_purge(); + flush_scheduled_work(); afs_cell_purge(); -#ifdef CONFIG_KEYS_TURNED_OFF - afs_key_unregister(); -#endif #ifdef AFS_CACHING_SUPPORT cachefs_unregister_netfs(&afs_cache_netfs); #endif afs_proc_cleanup(); - -} /* end afs_exit() */ - -module_exit(afs_exit); - -/*****************************************************************************/ -/* - * notification that new peer record is being added - * - called from krxsecd - * - return an error to induce an abort - * - mustn't sleep (caller holds an rwlock) - */ -static int afs_adding_peer(struct rxrpc_peer *peer) -{ - struct afs_server *server; - int ret; - - _debug("kAFS: Adding new peer %08x\n", ntohl(peer->addr.s_addr)); - - /* determine which server the peer resides in (if any) */ - ret = afs_server_find_by_peer(peer, &server); - if (ret < 0) - return ret; /* none that we recognise, so abort */ - - _debug("Server %p{u=%d}\n", server, atomic_read(&server->usage)); - - _debug("Cell %p{u=%d}\n", - server->cell, atomic_read(&server->cell->usage)); - - /* cross-point the structs under a global lock */ - spin_lock(&afs_server_peer_lock); - peer->user = server; - server->peer = peer; - spin_unlock(&afs_server_peer_lock); - - afs_put_server(server); - - return 0; -} /* end afs_adding_peer() */ - -/*****************************************************************************/ -/* - * notification that a peer record is being discarded - * - called from krxiod or krxsecd - */ -static void afs_discarding_peer(struct rxrpc_peer *peer) -{ - struct afs_server *server; - - _enter("%p",peer); - - _debug("Discarding peer %08x (rtt=%lu.%lumS)\n", - ntohl(peer->addr.s_addr), - (long) (peer->rtt / 1000), - (long) (peer->rtt % 1000)); - - /* uncross-point the structs under a global lock */ - spin_lock(&afs_server_peer_lock); - server = peer->user; - if (server) { - peer->user = NULL; - server->peer = NULL; - } - spin_unlock(&afs_server_peer_lock); - - _leave(""); - -} /* end afs_discarding_peer() */ - -/*****************************************************************************/ -/* - * clear the dead space between task_struct and kernel stack - * - called by supplying -finstrument-functions to gcc - */ -#if 0 -void __cyg_profile_func_enter (void *this_fn, void *call_site) -__attribute__((no_instrument_function)); - -void __cyg_profile_func_enter (void *this_fn, void *call_site) -{ - asm volatile(" movl %%esp,%%edi \n" - " andl %0,%%edi \n" - " addl %1,%%edi \n" - " movl %%esp,%%ecx \n" - " subl %%edi,%%ecx \n" - " shrl $2,%%ecx \n" - " movl $0xedededed,%%eax \n" - " rep stosl \n" - : - : "i"(~(THREAD_SIZE - 1)), "i"(sizeof(struct thread_info)) - : "eax", "ecx", "edi", "memory", "cc" - ); } -void __cyg_profile_func_exit(void *this_fn, void *call_site) -__attribute__((no_instrument_function)); - -void __cyg_profile_func_exit(void *this_fn, void *call_site) -{ - asm volatile(" movl %%esp,%%edi \n" - " andl %0,%%edi \n" - " addl %1,%%edi \n" - " movl %%esp,%%ecx \n" - " subl %%edi,%%ecx \n" - " shrl $2,%%ecx \n" - " movl $0xdadadada,%%eax \n" - " rep stosl \n" - : - : "i"(~(THREAD_SIZE - 1)), "i"(sizeof(struct thread_info)) - : "eax", "ecx", "edi", "memory", "cc" - ); -} -#endif +module_exit(afs_exit); diff --git a/fs/afs/misc.c b/fs/afs/misc.c index e4fce66..cdb9792 100644 --- a/fs/afs/misc.c +++ b/fs/afs/misc.c @@ -1,6 +1,6 @@ -/* misc.c: miscellaneous bits +/* miscellaneous bits * - * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. + * Copyright (C) 2002, 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 @@ -12,19 +12,20 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/errno.h> -#include "errors.h" #include "internal.h" +#include "afs_fs.h" -/*****************************************************************************/ /* * convert an AFS abort code to a Linux error number */ -int afs_abort_to_error(int abortcode) +int afs_abort_to_error(u32 abort_code) { - switch (abortcode) { + switch (abort_code) { + case 13: return -EACCES; + case 30: return -EROFS; case VSALVAGE: return -EIO; case VNOVNODE: return -ENOENT; - case VNOVOL: return -ENXIO; + case VNOVOL: return -ENOMEDIUM; case VVOLEXISTS: return -EEXIST; case VNOSERVICE: return -EIO; case VOFFLINE: return -ENOENT; @@ -33,7 +34,24 @@ int afs_abort_to_error(int abortcode) case VOVERQUOTA: return -EDQUOT; case VBUSY: return -EBUSY; case VMOVED: return -ENXIO; - default: return -EIO; + case 0x2f6df0c: return -EACCES; + case 0x2f6df0f: return -EBUSY; + case 0x2f6df10: return -EEXIST; + case 0x2f6df11: return -EXDEV; + case 0x2f6df13: return -ENOTDIR; + case 0x2f6df14: return -EISDIR; + case 0x2f6df15: return -EINVAL; + case 0x2f6df1a: return -EFBIG; + case 0x2f6df1b: return -ENOSPC; + case 0x2f6df1d: return -EROFS; + case 0x2f6df1e: return -EMLINK; + case 0x2f6df20: return -EDOM; + case 0x2f6df21: return -ERANGE; + case 0x2f6df22: return -EDEADLK; + case 0x2f6df23: return -ENAMETOOLONG; + case 0x2f6df24: return -ENOLCK; + case 0x2f6df26: return -ENOTEMPTY; + case 0x2f6df78: return -EDQUOT; + default: return -EREMOTEIO; } - -} /* end afs_abort_to_error() */ +} diff --git a/fs/afs/mntpt.c b/fs/afs/mntpt.c index 68495f0..b905ae3 100644 --- a/fs/afs/mntpt.c +++ b/fs/afs/mntpt.c @@ -1,4 +1,4 @@ -/* mntpt.c: mountpoint management +/* mountpoint management * * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) @@ -18,10 +18,6 @@ #include <linux/mount.h> #include <linux/namei.h> #include <linux/mnt_namespace.h> -#include "super.h" -#include "cell.h" -#include "volume.h" -#include "vnode.h" #include "internal.h" @@ -30,6 +26,7 @@ static struct dentry *afs_mntpt_lookup(struct inode *dir, struct nameidata *nd); static int afs_mntpt_open(struct inode *inode, struct file *file); static void *afs_mntpt_follow_link(struct dentry *dentry, struct nameidata *nd); +static void afs_mntpt_expiry_timed_out(struct work_struct *work); const struct file_operations afs_mntpt_file_operations = { .open = afs_mntpt_open, @@ -43,24 +40,19 @@ const struct inode_operations afs_mntpt_inode_operations = { }; static LIST_HEAD(afs_vfsmounts); +static DECLARE_DELAYED_WORK(afs_mntpt_expiry_timer, afs_mntpt_expiry_timed_out); -static void afs_mntpt_expiry_timed_out(struct afs_timer *timer); +unsigned long afs_mntpt_expiry_timeout = 10 * 60; -struct afs_timer_ops afs_mntpt_expiry_timer_ops = { - .timed_out = afs_mntpt_expiry_timed_out, -}; - -struct afs_timer afs_mntpt_expiry_timer; - -unsigned long afs_mntpt_expiry_timeout = 20; - -/*****************************************************************************/ /* * check a symbolic link to see whether it actually encodes a mountpoint * - sets the AFS_VNODE_MOUNTPOINT flag on the vnode appropriately */ -int afs_mntpt_check_symlink(struct afs_vnode *vnode) +int afs_mntpt_check_symlink(struct afs_vnode *vnode, struct key *key) { + struct file file = { + .private_data = key, + }; struct page *page; size_t size; char *buf; @@ -69,7 +61,7 @@ int afs_mntpt_check_symlink(struct afs_vnode *vnode) _enter("{%u,%u}", vnode->fid.vnode, vnode->fid.unique); /* read the contents of the symlink into the pagecache */ - page = read_mapping_page(AFS_VNODE_TO_I(vnode)->i_mapping, 0, NULL); + page = read_mapping_page(AFS_VNODE_TO_I(vnode)->i_mapping, 0, &file); if (IS_ERR(page)) { ret = PTR_ERR(page); goto out; @@ -85,7 +77,7 @@ int afs_mntpt_check_symlink(struct afs_vnode *vnode) /* examine the symlink's contents */ size = vnode->status.size; - _debug("symlink to %*.*s", size, (int) size, buf); + _debug("symlink to %*.*s", (int) size, (int) size, buf); if (size > 2 && (buf[0] == '%' || buf[0] == '#') && @@ -93,22 +85,20 @@ int afs_mntpt_check_symlink(struct afs_vnode *vnode) ) { _debug("symlink is a mountpoint"); spin_lock(&vnode->lock); - vnode->flags |= AFS_VNODE_MOUNTPOINT; + set_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags); spin_unlock(&vnode->lock); } ret = 0; - out_free: +out_free: kunmap(page); page_cache_release(page); - out: +out: _leave(" = %d", ret); return ret; +} -} /* end afs_mntpt_check_symlink() */ - -/*****************************************************************************/ /* * no valid lookup procedure on this sort of dir */ @@ -116,7 +106,7 @@ static struct dentry *afs_mntpt_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) { - kenter("%p,%p{%p{%s},%s}", + _enter("%p,%p{%p{%s},%s}", dir, dentry, dentry->d_parent, @@ -125,15 +115,14 @@ static struct dentry *afs_mntpt_lookup(struct inode *dir, dentry->d_name.name); return ERR_PTR(-EREMOTE); -} /* end afs_mntpt_lookup() */ +} -/*****************************************************************************/ /* * no valid open procedure on this sort of dir */ static int afs_mntpt_open(struct inode *inode, struct file *file) { - kenter("%p,%p{%p{%s},%s}", + _enter("%p,%p{%p{%s},%s}", inode, file, file->f_path.dentry->d_parent, file->f_path.dentry->d_parent ? @@ -142,9 +131,8 @@ static int afs_mntpt_open(struct inode *inode, struct file *file) file->f_path.dentry->d_name.name); return -EREMOTE; -} /* end afs_mntpt_open() */ +} -/*****************************************************************************/ /* * create a vfsmount to be automounted */ @@ -157,7 +145,7 @@ static struct vfsmount *afs_mntpt_do_automount(struct dentry *mntpt) char *buf, *devname = NULL, *options = NULL; int ret; - kenter("{%s}", mntpt->d_name.name); + _enter("{%s}", mntpt->d_name.name); BUG_ON(!mntpt->d_inode); @@ -201,79 +189,108 @@ static struct vfsmount *afs_mntpt_do_automount(struct dentry *mntpt) strcat(options, ",rwpath"); /* try and do the mount */ - kdebug("--- attempting mount %s -o %s ---", devname, options); + _debug("--- attempting mount %s -o %s ---", devname, options); mnt = vfs_kern_mount(&afs_fs_type, 0, devname, options); - kdebug("--- mount result %p ---", mnt); + _debug("--- mount result %p ---", mnt); free_page((unsigned long) devname); free_page((unsigned long) options); - kleave(" = %p", mnt); + _leave(" = %p", mnt); return mnt; - error: +error: if (page) page_cache_release(page); if (devname) free_page((unsigned long) devname); if (options) free_page((unsigned long) options); - kleave(" = %d", ret); + _leave(" = %d", ret); return ERR_PTR(ret); -} /* end afs_mntpt_do_automount() */ +} -/*****************************************************************************/ /* * follow a link from a mountpoint directory, thus causing it to be mounted */ static void *afs_mntpt_follow_link(struct dentry *dentry, struct nameidata *nd) { struct vfsmount *newmnt; - struct dentry *old_dentry; int err; - kenter("%p{%s},{%s:%p{%s}}", + _enter("%p{%s},{%s:%p{%s},}", dentry, dentry->d_name.name, nd->mnt->mnt_devname, dentry, nd->dentry->d_name.name); - newmnt = afs_mntpt_do_automount(dentry); + dput(nd->dentry); + nd->dentry = dget(dentry); + + newmnt = afs_mntpt_do_automount(nd->dentry); if (IS_ERR(newmnt)) { path_release(nd); return (void *)newmnt; } - old_dentry = nd->dentry; - nd->dentry = dentry; - err = do_add_mount(newmnt, nd, 0, &afs_vfsmounts); - nd->dentry = old_dentry; - - path_release(nd); - - if (!err) { - mntget(newmnt); + mntget(newmnt); + err = do_add_mount(newmnt, nd, MNT_SHRINKABLE, &afs_vfsmounts); + switch (err) { + case 0: + mntput(nd->mnt); + dput(nd->dentry); nd->mnt = newmnt; - dget(newmnt->mnt_root); - nd->dentry = newmnt->mnt_root; + nd->dentry = dget(newmnt->mnt_root); + schedule_delayed_work(&afs_mntpt_expiry_timer, + afs_mntpt_expiry_timeout * HZ); + break; + case -EBUSY: + /* someone else made a mount here whilst we were busy */ + while (d_mountpoint(nd->dentry) && + follow_down(&nd->mnt, &nd->dentry)) + ; + err = 0; + default: + mntput(newmnt); + break; } - kleave(" = %d", err); + _leave(" = %d", err); return ERR_PTR(err); -} /* end afs_mntpt_follow_link() */ +} -/*****************************************************************************/ /* * handle mountpoint expiry timer going off */ -static void afs_mntpt_expiry_timed_out(struct afs_timer *timer) +static void afs_mntpt_expiry_timed_out(struct work_struct *work) { - kenter(""); + _enter(""); - mark_mounts_for_expiry(&afs_vfsmounts); + if (!list_empty(&afs_vfsmounts)) { + mark_mounts_for_expiry(&afs_vfsmounts); + schedule_delayed_work(&afs_mntpt_expiry_timer, + afs_mntpt_expiry_timeout * HZ); + } + + _leave(""); +} - afs_kafstimod_add_timer(&afs_mntpt_expiry_timer, - afs_mntpt_expiry_timeout * HZ); +/* + * kill the AFS mountpoint timer if it's still running + */ +void afs_mntpt_kill_timer(void) +{ + _enter(""); - kleave(""); -} /* end afs_mntpt_expiry_timed_out() */ + ASSERT(list_empty(&afs_vfsmounts)); + cancel_delayed_work(&afs_mntpt_expiry_timer); + flush_scheduled_work(); +} + +/* + * begin unmount by attempting to remove all automounted mountpoints we added + */ +void afs_umount_begin(struct vfsmount *vfsmnt, int flags) +{ + shrink_submounts(vfsmnt, &afs_vfsmounts); +} diff --git a/fs/afs/mount.h b/fs/afs/mount.h deleted file mode 100644 index 9d2f46e..0000000 --- a/fs/afs/mount.h +++ /dev/null @@ -1,23 +0,0 @@ -/* mount.h: mount parameters - * - * Copyright (C) 2002 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. - */ - -#ifndef _LINUX_AFS_MOUNT_H -#define _LINUX_AFS_MOUNT_H - -struct afs_mountdata { - const char *volume; /* name of volume */ - const char *cell; /* name of cell containing volume */ - const char *cache; /* name of cache block device */ - size_t nservers; /* number of server addresses listed */ - uint32_t servers[10]; /* IP addresses of servers in this cell */ -}; - -#endif /* _LINUX_AFS_MOUNT_H */ diff --git a/fs/afs/proc.c b/fs/afs/proc.c index ae6b85b..d5601f6 100644 --- a/fs/afs/proc.c +++ b/fs/afs/proc.c @@ -1,4 +1,4 @@ -/* proc.c: /proc interface for AFS +/* /proc interface for AFS * * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) @@ -13,8 +13,6 @@ #include <linux/module.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> -#include "cell.h" -#include "volume.h" #include <asm/uaccess.h> #include "internal.h" @@ -130,7 +128,6 @@ static const struct file_operations afs_proc_cell_servers_fops = { .release = afs_proc_cell_servers_release, }; -/*****************************************************************************/ /* * initialise the /proc/fs/afs/ directory */ @@ -142,47 +139,43 @@ int afs_proc_init(void) proc_afs = proc_mkdir("fs/afs", NULL); if (!proc_afs) - goto error; + goto error_dir; proc_afs->owner = THIS_MODULE; p = create_proc_entry("cells", 0, proc_afs); if (!p) - goto error_proc; + goto error_cells; p->proc_fops = &afs_proc_cells_fops; p->owner = THIS_MODULE; p = create_proc_entry("rootcell", 0, proc_afs); if (!p) - goto error_cells; + goto error_rootcell; p->proc_fops = &afs_proc_rootcell_fops; p->owner = THIS_MODULE; _leave(" = 0"); return 0; - error_cells: +error_rootcell: remove_proc_entry("cells", proc_afs); - error_proc: +error_cells: remove_proc_entry("fs/afs", NULL); - error: +error_dir: _leave(" = -ENOMEM"); return -ENOMEM; +} -} /* end afs_proc_init() */ - -/*****************************************************************************/ /* * clean up the /proc/fs/afs/ directory */ void afs_proc_cleanup(void) { + remove_proc_entry("rootcell", proc_afs); remove_proc_entry("cells", proc_afs); - remove_proc_entry("fs/afs", NULL); +} -} /* end afs_proc_cleanup() */ - -/*****************************************************************************/ /* * open "/proc/fs/afs/cells" which provides a summary of extant cells */ @@ -199,9 +192,8 @@ static int afs_proc_cells_open(struct inode *inode, struct file *file) m->private = PDE(inode)->data; return 0; -} /* end afs_proc_cells_open() */ +} -/*****************************************************************************/ /* * set up the iterator to start reading from the cells list and return the * first item @@ -225,9 +217,8 @@ static void *afs_proc_cells_start(struct seq_file *m, loff_t *_pos) break; return _p != &afs_proc_cells ? _p : NULL; -} /* end afs_proc_cells_start() */ +} -/*****************************************************************************/ /* * move to next cell in cells list */ @@ -241,19 +232,16 @@ static void *afs_proc_cells_next(struct seq_file *p, void *v, loff_t *pos) _p = v == (void *) 1 ? afs_proc_cells.next : _p->next; return _p != &afs_proc_cells ? _p : NULL; -} /* end afs_proc_cells_next() */ +} -/*****************************************************************************/ /* * clean up after reading from the cells list */ static void afs_proc_cells_stop(struct seq_file *p, void *v) { up_read(&afs_proc_cells_sem); +} -} /* end afs_proc_cells_stop() */ - -/*****************************************************************************/ /* * display a header line followed by a load of cell lines */ @@ -261,19 +249,18 @@ static int afs_proc_cells_show(struct seq_file *m, void *v) { struct afs_cell *cell = list_entry(v, struct afs_cell, proc_link); - /* display header on line 1 */ if (v == (void *) 1) { + /* display header on line 1 */ seq_puts(m, "USE NAME\n"); return 0; } /* display one cell per line on subsequent lines */ - seq_printf(m, "%3d %s\n", atomic_read(&cell->usage), cell->name); - + seq_printf(m, "%3d %s\n", + atomic_read(&cell->usage), cell->name); return 0; -} /* end afs_proc_cells_show() */ +} -/*****************************************************************************/ /* * handle writes to /proc/fs/afs/cells * - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]" @@ -326,30 +313,32 @@ static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf, if (strcmp(kbuf, "add") == 0) { struct afs_cell *cell; - ret = afs_cell_create(name, args, &cell); - if (ret < 0) + + cell = afs_cell_create(name, args); + if (IS_ERR(cell)) { + ret = PTR_ERR(cell); goto done; + } + afs_put_cell(cell); printk("kAFS: Added new cell '%s'\n", name); - } - else { + } else { goto inval; } ret = size; - done: +done: kfree(kbuf); _leave(" = %d", ret); return ret; - inval: +inval: ret = -EINVAL; printk("kAFS: Invalid Command on /proc/fs/afs/cells file\n"); goto done; -} /* end afs_proc_cells_write() */ +} -/*****************************************************************************/ /* * Stubs for /proc/fs/afs/rootcell */ @@ -369,7 +358,6 @@ static ssize_t afs_proc_rootcell_read(struct file *file, char __user *buf, return 0; } -/*****************************************************************************/ /* * handle writes to /proc/fs/afs/rootcell * - to initialize rootcell: echo "cell.name:192.168.231.14" @@ -407,14 +395,13 @@ static ssize_t afs_proc_rootcell_write(struct file *file, if (ret >= 0) ret = size; /* consume everything, always */ - infault: +infault: kfree(kbuf); - nomem: +nomem: _leave(" = %d", ret); return ret; -} /* end afs_proc_rootcell_write() */ +} -/*****************************************************************************/ /* * initialise /proc/fs/afs/<cell>/ */ @@ -426,25 +413,25 @@ int afs_proc_cell_setup(struct afs_cell *cell) cell->proc_dir = proc_mkdir(cell->name, proc_afs); if (!cell->proc_dir) - return -ENOMEM; + goto error_dir; p = create_proc_entry("servers", 0, cell->proc_dir); if (!p) - goto error_proc; + goto error_servers; p->proc_fops = &afs_proc_cell_servers_fops; p->owner = THIS_MODULE; p->data = cell; p = create_proc_entry("vlservers", 0, cell->proc_dir); if (!p) - goto error_servers; + goto error_vlservers; p->proc_fops = &afs_proc_cell_vlservers_fops; p->owner = THIS_MODULE; p->data = cell; p = create_proc_entry("volumes", 0, cell->proc_dir); if (!p) - goto error_vlservers; + goto error_volumes; p->proc_fops = &afs_proc_cell_volumes_fops; p->owner = THIS_MODULE; p->data = cell; @@ -452,17 +439,17 @@ int afs_proc_cell_setup(struct afs_cell *cell) _leave(" = 0"); return 0; - error_vlservers: +error_volumes: remove_proc_entry("vlservers", cell->proc_dir); - error_servers: +error_vlservers: remove_proc_entry("servers", cell->proc_dir); - error_proc: +error_servers: remove_proc_entry(cell->name, proc_afs); +error_dir: _leave(" = -ENOMEM"); return -ENOMEM; -} /* end afs_proc_cell_setup() */ +} -/*****************************************************************************/ /* * remove /proc/fs/afs/<cell>/ */ @@ -476,9 +463,8 @@ void afs_proc_cell_remove(struct afs_cell *cell) remove_proc_entry(cell->name, proc_afs); _leave(""); -} /* end afs_proc_cell_remove() */ +} -/*****************************************************************************/ /* * open "/proc/fs/afs/<cell>/volumes" which provides a summary of extant cells */ @@ -488,7 +474,7 @@ static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file) struct seq_file *m; int ret; - cell = afs_get_cell_maybe((struct afs_cell **) &PDE(inode)->data); + cell = PDE(inode)->data; if (!cell) return -ENOENT; @@ -500,25 +486,16 @@ static int afs_proc_cell_volumes_open(struct inode *inode, struct file *file) m->private = cell; return 0; -} /* end afs_proc_cell_volumes_open() */ +} -/*****************************************************************************/ /* * close the file and release the ref to the cell */ static int afs_proc_cell_volumes_release(struct inode *inode, struct file *file) { - struct afs_cell *cell = PDE(inode)->data; - int ret; - - ret = seq_release(inode,file); - - afs_put_cell(cell); - - return ret; -} /* end afs_proc_cell_volumes_release() */ + return seq_release(inode, file); +} -/*****************************************************************************/ /* * set up the iterator to start reading from the cells list and return the * first item @@ -545,9 +522,8 @@ static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos) break; return _p != &cell->vl_list ? _p : NULL; -} /* end afs_proc_cell_volumes_start() */ +} -/*****************************************************************************/ /* * move to next cell in cells list */ @@ -562,12 +538,11 @@ static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v, (*_pos)++; _p = v; - _p = v == (void *) 1 ? cell->vl_list.next : _p->next; + _p = (v == (void *) 1) ? cell->vl_list.next : _p->next; - return _p != &cell->vl_list ? _p : NULL; -} /* end afs_proc_cell_volumes_next() */ + return (_p != &cell->vl_list) ? _p : NULL; +} -/*****************************************************************************/ /* * clean up after reading from the cells list */ @@ -576,10 +551,18 @@ static void afs_proc_cell_volumes_stop(struct seq_file *p, void *v) struct afs_cell *cell = p->private; up_read(&cell->vl_sem); +} -} /* end afs_proc_cell_volumes_stop() */ +const char afs_vlocation_states[][4] = { + [AFS_VL_NEW] = "New", + [AFS_VL_CREATING] = "Crt", + [AFS_VL_VALID] = "Val", + [AFS_VL_NO_VOLUME] = "NoV", + [AFS_VL_UPDATING] = "Upd", + [AFS_VL_VOLUME_DELETED] = "Del", + [AFS_VL_UNCERTAIN] = "Unc", +}; -/*****************************************************************************/ /* * display a header line followed by a load of volume lines */ @@ -590,23 +573,22 @@ static int afs_proc_cell_volumes_show(struct seq_file *m, void *v) /* display header on line 1 */ if (v == (void *) 1) { - seq_puts(m, "USE VLID[0] VLID[1] VLID[2] NAME\n"); + seq_puts(m, "USE STT VLID[0] VLID[1] VLID[2] NAME\n"); return 0; } /* display one cell per line on subsequent lines */ - seq_printf(m, "%3d %08x %08x %08x %s\n", + seq_printf(m, "%3d %s %08x %08x %08x %s\n", atomic_read(&vlocation->usage), + afs_vlocation_states[vlocation->state], vlocation->vldb.vid[0], vlocation->vldb.vid[1], vlocation->vldb.vid[2], - vlocation->vldb.name - ); + vlocation->vldb.name); return 0; -} /* end afs_proc_cell_volumes_show() */ +} -/*****************************************************************************/ /* * open "/proc/fs/afs/<cell>/vlservers" which provides a list of volume * location server @@ -617,11 +599,11 @@ static int afs_proc_cell_vlservers_open(struct inode *inode, struct file *file) struct seq_file *m; int ret; - cell = afs_get_cell_maybe((struct afs_cell**)&PDE(inode)->data); + cell = PDE(inode)->data; if (!cell) return -ENOENT; - ret = seq_open(file,&afs_proc_cell_vlservers_ops); + ret = seq_open(file, &afs_proc_cell_vlservers_ops); if (ret<0) return ret; @@ -629,26 +611,17 @@ static int afs_proc_cell_vlservers_open(struct inode *inode, struct file *file) m->private = cell; return 0; -} /* end afs_proc_cell_vlservers_open() */ +} -/*****************************************************************************/ /* * close the file and release the ref to the cell */ static int afs_proc_cell_vlservers_release(struct inode *inode, struct file *file) { - struct afs_cell *cell = PDE(inode)->data; - int ret; - - ret = seq_release(inode,file); - - afs_put_cell(cell); - - return ret; -} /* end afs_proc_cell_vlservers_release() */ + return seq_release(inode, file); +} -/*****************************************************************************/ /* * set up the iterator to start reading from the cells list and return the * first item @@ -672,9 +645,8 @@ static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos) return NULL; return &cell->vl_addrs[pos]; -} /* end afs_proc_cell_vlservers_start() */ +} -/*****************************************************************************/ /* * move to next cell in cells list */ @@ -692,9 +664,8 @@ static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v, return NULL; return &cell->vl_addrs[pos]; -} /* end afs_proc_cell_vlservers_next() */ +} -/*****************************************************************************/ /* * clean up after reading from the cells list */ @@ -703,10 +674,8 @@ static void afs_proc_cell_vlservers_stop(struct seq_file *p, void *v) struct afs_cell *cell = p->private; up_read(&cell->vl_sem); +} -} /* end afs_proc_cell_vlservers_stop() */ - -/*****************************************************************************/ /* * display a header line followed by a load of volume lines */ @@ -722,11 +691,9 @@ static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v) /* display one cell per line on subsequent lines */ seq_printf(m, "%u.%u.%u.%u\n", NIPQUAD(addr->s_addr)); - return 0; -} /* end afs_proc_cell_vlservers_show() */ +} -/*****************************************************************************/ /* * open "/proc/fs/afs/<cell>/servers" which provides a summary of active * servers @@ -737,7 +704,7 @@ static int afs_proc_cell_servers_open(struct inode *inode, struct file *file) struct seq_file *m; int ret; - cell = afs_get_cell_maybe((struct afs_cell **) &PDE(inode)->data); + cell = PDE(inode)->data; if (!cell) return -ENOENT; @@ -747,34 +714,24 @@ static int afs_proc_cell_servers_open(struct inode *inode, struct file *file) m = file->private_data; m->private = cell; - return 0; -} /* end afs_proc_cell_servers_open() */ +} -/*****************************************************************************/ /* * close the file and release the ref to the cell */ static int afs_proc_cell_servers_release(struct inode *inode, struct file *file) { - struct afs_cell *cell = PDE(inode)->data; - int ret; - - ret = seq_release(inode, file); - - afs_put_cell(cell); - - return ret; -} /* end afs_proc_cell_servers_release() */ + return seq_release(inode, file); +} -/*****************************************************************************/ /* * set up the iterator to start reading from the cells list and return the * first item */ static void *afs_proc_cell_servers_start(struct seq_file *m, loff_t *_pos) - __acquires(m->private->sv_lock) + __acquires(m->private->servers_lock) { struct list_head *_p; struct afs_cell *cell = m->private; @@ -783,7 +740,7 @@ static void *afs_proc_cell_servers_start(struct seq_file *m, loff_t *_pos) _enter("cell=%p pos=%Ld", cell, *_pos); /* lock the list against modification */ - read_lock(&cell->sv_lock); + read_lock(&cell->servers_lock); /* allow for the header line */ if (!pos) @@ -791,14 +748,13 @@ static void *afs_proc_cell_servers_start(struct seq_file *m, loff_t *_pos) pos--; /* find the n'th element in the list */ - list_for_each(_p, &cell->sv_list) + list_for_each(_p, &cell->servers) if (!pos--) break; - return _p != &cell->sv_list ? _p : NULL; -} /* end afs_proc_cell_servers_start() */ + return _p != &cell->servers ? _p : NULL; +} -/*****************************************************************************/ /* * move to next cell in cells list */ @@ -813,25 +769,22 @@ static void *afs_proc_cell_servers_next(struct seq_file *p, void *v, (*_pos)++; _p = v; - _p = v == (void *) 1 ? cell->sv_list.next : _p->next; + _p = v == (void *) 1 ? cell->servers.next : _p->next; - return _p != &cell->sv_list ? _p : NULL; -} /* end afs_proc_cell_servers_next() */ + return _p != &cell->servers ? _p : NULL; +} -/*****************************************************************************/ /* * clean up after reading from the cells list */ static void afs_proc_cell_servers_stop(struct seq_file *p, void *v) - __releases(p->private->sv_lock) + __releases(p->private->servers_lock) { struct afs_cell *cell = p->private; - read_unlock(&cell->sv_lock); - -} /* end afs_proc_cell_servers_stop() */ + read_unlock(&cell->servers_lock); +} -/*****************************************************************************/ /* * display a header line followed by a load of volume lines */ @@ -849,10 +802,7 @@ static int afs_proc_cell_servers_show(struct seq_file *m, void *v) /* display one cell per line on subsequent lines */ sprintf(ipaddr, "%u.%u.%u.%u", NIPQUAD(server->addr)); seq_printf(m, "%3d %-15.15s %5d\n", - atomic_read(&server->usage), - ipaddr, - server->fs_state - ); + atomic_read(&server->usage), ipaddr, server->fs_state); return 0; -} /* end afs_proc_cell_servers_show() */ +} diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c new file mode 100644 index 0000000..e7b0473 --- /dev/null +++ b/fs/afs/rxrpc.c @@ -0,0 +1,782 @@ +/* Maintain an RxRPC server socket to do AFS communications through + * + * 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 <net/sock.h> +#include <net/af_rxrpc.h> +#include <rxrpc/packet.h> +#include "internal.h" +#include "afs_cm.h" + +static struct socket *afs_socket; /* my RxRPC socket */ +static struct workqueue_struct *afs_async_calls; +static atomic_t afs_outstanding_calls; +static atomic_t afs_outstanding_skbs; + +static void afs_wake_up_call_waiter(struct afs_call *); +static int afs_wait_for_call_to_complete(struct afs_call *); +static void afs_wake_up_async_call(struct afs_call *); +static int afs_dont_wait_for_call_to_complete(struct afs_call *); +static void afs_process_async_call(struct work_struct *); +static void afs_rx_interceptor(struct sock *, unsigned long, struct sk_buff *); +static int afs_deliver_cm_op_id(struct afs_call *, struct sk_buff *, bool); + +/* synchronous call management */ +const struct afs_wait_mode afs_sync_call = { + .rx_wakeup = afs_wake_up_call_waiter, + .wait = afs_wait_for_call_to_complete, +}; + +/* asynchronous call management */ +const struct afs_wait_mode afs_async_call = { + .rx_wakeup = afs_wake_up_async_call, + .wait = afs_dont_wait_for_call_to_complete, +}; + +/* asynchronous incoming call management */ +static const struct afs_wait_mode afs_async_incoming_call = { + .rx_wakeup = afs_wake_up_async_call, +}; + +/* asynchronous incoming call initial processing */ +static const struct afs_call_type afs_RXCMxxxx = { + .name = "CB.xxxx", + .deliver = afs_deliver_cm_op_id, + .abort_to_error = afs_abort_to_error, +}; + +static void afs_collect_incoming_call(struct work_struct *); + +static struct sk_buff_head afs_incoming_calls; +static DECLARE_WORK(afs_collect_incoming_call_work, afs_collect_incoming_call); + +/* + * open an RxRPC socket and bind it to be a server for callback notifications + * - the socket is left in blocking mode and non-blocking ops use MSG_DONTWAIT + */ +int afs_open_socket(void) +{ + struct sockaddr_rxrpc srx; + struct socket *socket; + int ret; + + _enter(""); + + skb_queue_head_init(&afs_incoming_calls); + + afs_async_calls = create_singlethread_workqueue("kafsd"); + if (!afs_async_calls) { + _leave(" = -ENOMEM [wq]"); + return -ENOMEM; + } + + ret = sock_create_kern(AF_RXRPC, SOCK_DGRAM, PF_INET, &socket); + if (ret < 0) { + destroy_workqueue(afs_async_calls); + _leave(" = %d [socket]", ret); + return ret; + } + + socket->sk->sk_allocation = GFP_NOFS; + + /* bind the callback manager's address to make this a server socket */ + srx.srx_family = AF_RXRPC; + srx.srx_service = CM_SERVICE; + srx.transport_type = SOCK_DGRAM; + srx.transport_len = sizeof(srx.transport.sin); + srx.transport.sin.sin_family = AF_INET; + srx.transport.sin.sin_port = htons(AFS_CM_PORT); + memset(&srx.transport.sin.sin_addr, 0, + sizeof(srx.transport.sin.sin_addr)); + + ret = kernel_bind(socket, (struct sockaddr *) &srx, sizeof(srx)); + if (ret < 0) { + sock_release(socket); + _leave(" = %d [bind]", ret); + return ret; + } + + rxrpc_kernel_intercept_rx_messages(socket, afs_rx_interceptor); + + afs_socket = socket; + _leave(" = 0"); + return 0; +} + +/* + * close the RxRPC socket AFS was using + */ +void afs_close_socket(void) +{ + _enter(""); + + sock_release(afs_socket); + + _debug("dework"); + destroy_workqueue(afs_async_calls); + + ASSERTCMP(atomic_read(&afs_outstanding_skbs), ==, 0); + ASSERTCMP(atomic_read(&afs_outstanding_calls), ==, 0); + _leave(""); +} + +/* + * note that the data in a socket buffer is now delivered and that the buffer + * should be freed + */ +static void afs_data_delivered(struct sk_buff *skb) +{ + if (!skb) { + _debug("DLVR NULL [%d]", atomic_read(&afs_outstanding_skbs)); + dump_stack(); + } else { + _debug("DLVR %p{%u} [%d]", + skb, skb->mark, atomic_read(&afs_outstanding_skbs)); + if (atomic_dec_return(&afs_outstanding_skbs) == -1) + BUG(); + rxrpc_kernel_data_delivered(skb); + } +} + +/* + * free a socket buffer + */ +static void afs_free_skb(struct sk_buff *skb) +{ + if (!skb) { + _debug("FREE NULL [%d]", atomic_read(&afs_outstanding_skbs)); + dump_stack(); + } else { + _debug("FREE %p{%u} [%d]", + skb, skb->mark, atomic_read(&afs_outstanding_skbs)); + if (atomic_dec_return(&afs_outstanding_skbs) == -1) + BUG(); + rxrpc_kernel_free_skb(skb); + } +} + +/* + * free a call + */ +static void afs_free_call(struct afs_call *call) +{ + _debug("DONE %p{%s} [%d]", + call, call->type->name, atomic_read(&afs_outstanding_calls)); + if (atomic_dec_return(&afs_outstanding_calls) == -1) + BUG(); + + ASSERTCMP(call->rxcall, ==, NULL); + ASSERT(!work_pending(&call->async_work)); + ASSERT(skb_queue_empty(&call->rx_queue)); + ASSERT(call->type->name != NULL); + + kfree(call->request); + kfree(call); +} + +/* + * allocate a call with flat request and reply buffers + */ +struct afs_call *afs_alloc_flat_call(const struct afs_call_type *type, + size_t request_size, size_t reply_size) +{ + struct afs_call *call; + + call = kzalloc(sizeof(*call), GFP_NOFS); + if (!call) + goto nomem_call; + + _debug("CALL %p{%s} [%d]", + call, type->name, atomic_read(&afs_outstanding_calls)); + atomic_inc(&afs_outstanding_calls); + + call->type = type; + call->request_size = request_size; + call->reply_max = reply_size; + + if (request_size) { + call->request = kmalloc(request_size, GFP_NOFS); + if (!call->request) + goto nomem_free; + } + + if (reply_size) { + call->buffer = kmalloc(reply_size, GFP_NOFS); + if (!call->buffer) + goto nomem_free; + } + + init_waitqueue_head(&call->waitq); + skb_queue_head_init(&call->rx_queue); + return call; + +nomem_free: + afs_free_call(call); +nomem_call: + return NULL; +} + +/* + * clean up a call with flat buffer + */ +void afs_flat_call_destructor(struct afs_call *call) +{ + _enter(""); + + kfree(call->request); + call->request = NULL; + kfree(call->buffer); + call->buffer = NULL; +} + +/* + * initiate a call + */ +int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp, + const struct afs_wait_mode *wait_mode) +{ + struct sockaddr_rxrpc srx; + struct rxrpc_call *rxcall; + struct msghdr msg; + struct kvec iov[1]; + int ret; + + _enter("%x,{%d},", addr->s_addr, ntohs(call->port)); + + ASSERT(call->type != NULL); + ASSERT(call->type->name != NULL); + + _debug("MAKE %p{%s} [%d]", + call, call->type->name, atomic_read(&afs_outstanding_calls)); + + call->wait_mode = wait_mode; + INIT_WORK(&call->async_work, afs_process_async_call); + + memset(&srx, 0, sizeof(srx)); + srx.srx_family = AF_RXRPC; + srx.srx_service = call->service_id; + srx.transport_type = SOCK_DGRAM; + srx.transport_len = sizeof(srx.transport.sin); + srx.transport.sin.sin_family = AF_INET; + srx.transport.sin.sin_port = call->port; + memcpy(&srx.transport.sin.sin_addr, addr, 4); + + /* create a call */ + rxcall = rxrpc_kernel_begin_call(afs_socket, &srx, call->key, + (unsigned long) call, gfp); + call->key = NULL; + if (IS_ERR(rxcall)) { + ret = PTR_ERR(rxcall); + goto error_kill_call; + } + + call->rxcall = rxcall; + + /* send the request */ + iov[0].iov_base = call->request; + iov[0].iov_len = call->request_size; + + msg.msg_name = NULL; + msg.msg_namelen = 0; + msg.msg_iov = (struct iovec *) iov; + msg.msg_iovlen = 1; + msg.msg_control = NULL; + msg.msg_controllen = 0; + msg.msg_flags = 0; + + /* have to change the state *before* sending the last packet as RxRPC + * might give us the reply before it returns from sending the + * request */ + call->state = AFS_CALL_AWAIT_REPLY; + ret = rxrpc_kernel_send_data(rxcall, &msg, call->request_size); + if (ret < 0) + goto error_do_abort; + + /* at this point, an async call may no longer exist as it may have + * already completed */ + return wait_mode->wait(call); + +error_do_abort: + rxrpc_kernel_abort_call(rxcall, RX_USER_ABORT); + rxrpc_kernel_end_call(rxcall); + call->rxcall = NULL; +error_kill_call: + call->type->destructor(call); + afs_free_call(call); + _leave(" = %d", ret); + return ret; +} + +/* + * handles intercepted messages that were arriving in the socket's Rx queue + * - called with the socket receive queue lock held to ensure message ordering + * - called with softirqs disabled + */ +static void afs_rx_interceptor(struct sock *sk, unsigned long user_call_ID, + struct sk_buff *skb) +{ + struct afs_call *call = (struct afs_call *) user_call_ID; + + _enter("%p,,%u", call, skb->mark); + + _debug("ICPT %p{%u} [%d]", + skb, skb->mark, atomic_read(&afs_outstanding_skbs)); + + ASSERTCMP(sk, ==, afs_socket->sk); + atomic_inc(&afs_outstanding_skbs); + + if (!call) { + /* its an incoming call for our callback service */ + skb_queue_tail(&afs_incoming_calls, skb); + schedule_work(&afs_collect_incoming_call_work); + } else { + /* route the messages directly to the appropriate call */ + skb_queue_tail(&call->rx_queue, skb); + call->wait_mode->rx_wakeup(call); + } + + _leave(""); +} + +/* + * deliver messages to a call + */ +static void afs_deliver_to_call(struct afs_call *call) +{ + struct sk_buff *skb; + bool last; + u32 abort_code; + int ret; + + _enter(""); + + while ((call->state == AFS_CALL_AWAIT_REPLY || + call->state == AFS_CALL_AWAIT_OP_ID || + call->state == AFS_CALL_AWAIT_REQUEST || + call->state == AFS_CALL_AWAIT_ACK) && + (skb = skb_dequeue(&call->rx_queue))) { + switch (skb->mark) { + case RXRPC_SKB_MARK_DATA: + _debug("Rcv DATA"); + last = rxrpc_kernel_is_data_last(skb); + ret = call->type->deliver(call, skb, last); + switch (ret) { + case 0: + if (last && + call->state == AFS_CALL_AWAIT_REPLY) + call->state = AFS_CALL_COMPLETE; + break; + case -ENOTCONN: + abort_code = RX_CALL_DEAD; + goto do_abort; + case -ENOTSUPP: + abort_code = RX_INVALID_OPERATION; + goto do_abort; + default: + abort_code = RXGEN_CC_UNMARSHAL; + if (call->state != AFS_CALL_AWAIT_REPLY) + abort_code = RXGEN_SS_UNMARSHAL; + do_abort: + rxrpc_kernel_abort_call(call->rxcall, + abort_code); + call->error = ret; + call->state = AFS_CALL_ERROR; + break; + } + afs_data_delivered(skb); + skb = NULL; + continue; + case RXRPC_SKB_MARK_FINAL_ACK: + _debug("Rcv ACK"); + call->state = AFS_CALL_COMPLETE; + break; + case RXRPC_SKB_MARK_BUSY: + _debug("Rcv BUSY"); + call->error = -EBUSY; + call->state = AFS_CALL_BUSY; + break; + case RXRPC_SKB_MARK_REMOTE_ABORT: + abort_code = rxrpc_kernel_get_abort_code(skb); + call->error = call->type->abort_to_error(abort_code); + call->state = AFS_CALL_ABORTED; + _debug("Rcv ABORT %u -> %d", abort_code, call->error); + break; + case RXRPC_SKB_MARK_NET_ERROR: + call->error = -rxrpc_kernel_get_error_number(skb); + call->state = AFS_CALL_ERROR; + _debug("Rcv NET ERROR %d", call->error); + break; + case RXRPC_SKB_MARK_LOCAL_ERROR: + call->error = -rxrpc_kernel_get_error_number(skb); + call->state = AFS_CALL_ERROR; + _debug("Rcv LOCAL ERROR %d", call->error); + break; + default: + BUG(); + break; + } + + afs_free_skb(skb); + } + + /* make sure the queue is empty if the call is done with (we might have + * aborted the call early because of an unmarshalling error) */ + if (call->state >= AFS_CALL_COMPLETE) { + while ((skb = skb_dequeue(&call->rx_queue))) + afs_free_skb(skb); + if (call->incoming) { + rxrpc_kernel_end_call(call->rxcall); + call->rxcall = NULL; + call->type->destructor(call); + afs_free_call(call); + } + } + + _leave(""); +} + +/* + * wait synchronously for a call to complete + */ +static int afs_wait_for_call_to_complete(struct afs_call *call) +{ + struct sk_buff *skb; + int ret; + + DECLARE_WAITQUEUE(myself, current); + + _enter(""); + + add_wait_queue(&call->waitq, &myself); + for (;;) { + set_current_state(TASK_INTERRUPTIBLE); + + /* deliver any messages that are in the queue */ + if (!skb_queue_empty(&call->rx_queue)) { + __set_current_state(TASK_RUNNING); + afs_deliver_to_call(call); + continue; + } + + ret = call->error; + if (call->state >= AFS_CALL_COMPLETE) + break; + ret = -EINTR; + if (signal_pending(current)) + break; + schedule(); + } + + remove_wait_queue(&call->waitq, &myself); + __set_current_state(TASK_RUNNING); + + /* kill the call */ + if (call->state < AFS_CALL_COMPLETE) { + _debug("call incomplete"); + rxrpc_kernel_abort_call(call->rxcall, RX_CALL_DEAD); + while ((skb = skb_dequeue(&call->rx_queue))) + afs_free_skb(skb); + } + + _debug("call complete"); + rxrpc_kernel_end_call(call->rxcall); + call->rxcall = NULL; + call->type->destructor(call); + afs_free_call(call); + _leave(" = %d", ret); + return ret; +} + +/* + * wake up a waiting call + */ +static void afs_wake_up_call_waiter(struct afs_call *call) +{ + wake_up(&call->waitq); +} + +/* + * wake up an asynchronous call + */ +static void afs_wake_up_async_call(struct afs_call *call) +{ + _enter(""); + queue_work(afs_async_calls, &call->async_work); +} + +/* + * put a call into asynchronous mode + * - mustn't touch the call descriptor as the call my have completed by the + * time we get here + */ +static int afs_dont_wait_for_call_to_complete(struct afs_call *call) +{ + _enter(""); + return -EINPROGRESS; +} + +/* + * delete an asynchronous call + */ +static void afs_delete_async_call(struct work_struct *work) +{ + struct afs_call *call = + container_of(work, struct afs_call, async_work); + + _enter(""); + + afs_free_call(call); + + _leave(""); +} + +/* + * perform processing on an asynchronous call + * - on a multiple-thread workqueue this work item may try to run on several + * CPUs at the same time + */ +static void afs_process_async_call(struct work_struct *work) +{ + struct afs_call *call = + container_of(work, struct afs_call, async_work); + + _enter(""); + + if (!skb_queue_empty(&call->rx_queue)) + afs_deliver_to_call(call); + + if (call->state >= AFS_CALL_COMPLETE && call->wait_mode) { + if (call->wait_mode->async_complete) + call->wait_mode->async_complete(call->reply, + call->error); + call->reply = NULL; + + /* kill the call */ + rxrpc_kernel_end_call(call->rxcall); + call->rxcall = NULL; + if (call->type->destructor) + call->type->destructor(call); + + /* we can't just delete the call because the work item may be + * queued */ + PREPARE_WORK(&call->async_work, afs_delete_async_call); + queue_work(afs_async_calls, &call->async_work); + } + + _leave(""); +} + +/* + * empty a socket buffer into a flat reply buffer + */ +void afs_transfer_reply(struct afs_call *call, struct sk_buff *skb) +{ + size_t len = skb->len; + + if (skb_copy_bits(skb, 0, call->buffer + call->reply_size, len) < 0) + BUG(); + call->reply_size += len; +} + +/* + * accept the backlog of incoming calls + */ +static void afs_collect_incoming_call(struct work_struct *work) +{ + struct rxrpc_call *rxcall; + struct afs_call *call = NULL; + struct sk_buff *skb; + + while ((skb = skb_dequeue(&afs_incoming_calls))) { + _debug("new call"); + + /* don't need the notification */ + afs_free_skb(skb); + + if (!call) { + call = kzalloc(sizeof(struct afs_call), GFP_KERNEL); + if (!call) { + rxrpc_kernel_reject_call(afs_socket); + return; + } + + INIT_WORK(&call->async_work, afs_process_async_call); + call->wait_mode = &afs_async_incoming_call; + call->type = &afs_RXCMxxxx; + init_waitqueue_head(&call->waitq); + skb_queue_head_init(&call->rx_queue); + call->state = AFS_CALL_AWAIT_OP_ID; + + _debug("CALL %p{%s} [%d]", + call, call->type->name, + atomic_read(&afs_outstanding_calls)); + atomic_inc(&afs_outstanding_calls); + } + + rxcall = rxrpc_kernel_accept_call(afs_socket, + (unsigned long) call); + if (!IS_ERR(rxcall)) { + call->rxcall = rxcall; + call = NULL; + } + } + + if (call) + afs_free_call(call); +} + +/* + * grab the operation ID from an incoming cache manager call + */ +static int afs_deliver_cm_op_id(struct afs_call *call, struct sk_buff *skb, + bool last) +{ + size_t len = skb->len; + void *oibuf = (void *) &call->operation_ID; + + _enter("{%u},{%zu},%d", call->offset, len, last); + + ASSERTCMP(call->offset, <, 4); + + /* the operation ID forms the first four bytes of the request data */ + len = min_t(size_t, len, 4 - call->offset); + if (skb_copy_bits(skb, 0, oibuf + call->offset, len) < 0) + BUG(); + if (!pskb_pull(skb, len)) + BUG(); + call->offset += len; + + if (call->offset < 4) { + if (last) { + _leave(" = -EBADMSG [op ID short]"); + return -EBADMSG; + } + _leave(" = 0 [incomplete]"); + return 0; + } + + call->state = AFS_CALL_AWAIT_REQUEST; + + /* ask the cache manager to route the call (it'll change the call type + * if successful) */ + if (!afs_cm_incoming_call(call)) + return -ENOTSUPP; + + /* pass responsibility for the remainer of this message off to the + * cache manager op */ + return call->type->deliver(call, skb, last); +} + +/* + * send an empty reply + */ +void afs_send_empty_reply(struct afs_call *call) +{ + struct msghdr msg; + struct iovec iov[1]; + + _enter(""); + + iov[0].iov_base = NULL; + iov[0].iov_len = 0; + msg.msg_name = NULL; + msg.msg_namelen = 0; + msg.msg_iov = iov; + msg.msg_iovlen = 0; + msg.msg_control = NULL; + msg.msg_controllen = 0; + msg.msg_flags = 0; + + call->state = AFS_CALL_AWAIT_ACK; + switch (rxrpc_kernel_send_data(call->rxcall, &msg, 0)) { + case 0: + _leave(" [replied]"); + return; + + case -ENOMEM: + _debug("oom"); + rxrpc_kernel_abort_call(call->rxcall, RX_USER_ABORT); + default: + rxrpc_kernel_end_call(call->rxcall); + call->rxcall = NULL; + call->type->destructor(call); + afs_free_call(call); + _leave(" [error]"); + return; + } +} + +/* + * send a simple reply + */ +void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len) +{ + struct msghdr msg; + struct iovec iov[1]; + + _enter(""); + + iov[0].iov_base = (void *) buf; + iov[0].iov_len = len; + msg.msg_name = NULL; + msg.msg_namelen = 0; + msg.msg_iov = iov; + msg.msg_iovlen = 1; + msg.msg_control = NULL; + msg.msg_controllen = 0; + msg.msg_flags = 0; + + call->state = AFS_CALL_AWAIT_ACK; + switch (rxrpc_kernel_send_data(call->rxcall, &msg, len)) { + case 0: + _leave(" [replied]"); + return; + + case -ENOMEM: + _debug("oom"); + rxrpc_kernel_abort_call(call->rxcall, RX_USER_ABORT); + default: + rxrpc_kernel_end_call(call->rxcall); + call->rxcall = NULL; + call->type->destructor(call); + afs_free_call(call); + _leave(" [error]"); + return; + } +} + +/* + * extract a piece of data from the received data socket buffers + */ +int afs_extract_data(struct afs_call *call, struct sk_buff *skb, + bool last, void *buf, size_t count) +{ + size_t len = skb->len; + + _enter("{%u},{%zu},%d,,%zu", call->offset, len, last, count); + + ASSERTCMP(call->offset, <, count); + + len = min_t(size_t, len, count - call->offset); + if (skb_copy_bits(skb, 0, buf + call->offset, len) < 0 || + !pskb_pull(skb, len)) + BUG(); + call->offset += len; + + if (call->offset < count) { + if (last) { + _leave(" = -EBADMSG [%d < %lu]", call->offset, count); + return -EBADMSG; + } + _leave(" = -EAGAIN"); + return -EAGAIN; + } + return 0; +} diff --git a/fs/afs/security.c b/fs/afs/security.c new file mode 100644 index 0000000..f9f424d --- /dev/null +++ b/fs/afs/security.c @@ -0,0 +1,356 @@ +/* AFS security handling + * + * 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/init.h> +#include <linux/slab.h> +#include <linux/fs.h> +#include <linux/ctype.h> +#include <keys/rxrpc-type.h> +#include "internal.h" + +/* + * get a key + */ +struct key *afs_request_key(struct afs_cell *cell) +{ + struct key *key; + + _enter("{%x}", key_serial(cell->anonymous_key)); + + _debug("key %s", cell->anonymous_key->description); + key = request_key(&key_type_rxrpc, cell->anonymous_key->description, + NULL); + if (IS_ERR(key)) { + if (PTR_ERR(key) != -ENOKEY) { + _leave(" = %ld", PTR_ERR(key)); + return key; + } + + /* act as anonymous user */ + _leave(" = {%x} [anon]", key_serial(cell->anonymous_key)); + return key_get(cell->anonymous_key); + } else { + /* act as authorised user */ + _leave(" = {%x} [auth]", key_serial(key)); + return key; + } +} + +/* + * dispose of a permits list + */ +void afs_zap_permits(struct rcu_head *rcu) +{ + struct afs_permits *permits = + container_of(rcu, struct afs_permits, rcu); + int loop; + + _enter("{%d}", permits->count); + + for (loop = permits->count - 1; loop >= 0; loop--) + key_put(permits->permits[loop].key); + kfree(permits); +} + +/* + * dispose of a permits list in which all the key pointers have been copied + */ +static void afs_dispose_of_permits(struct rcu_head *rcu) +{ + struct afs_permits *permits = + container_of(rcu, struct afs_permits, rcu); + + _enter("{%d}", permits->count); + + kfree(permits); +} + +/* + * get the authorising vnode - this is the specified inode itself if it's a + * directory or it's the parent directory if the specified inode is a file or + * symlink + * - the caller must release the ref on the inode + */ +static struct afs_vnode *afs_get_auth_inode(struct afs_vnode *vnode, + struct key *key) +{ + struct afs_vnode *auth_vnode; + struct inode *auth_inode; + + _enter(""); + + if (S_ISDIR(vnode->vfs_inode.i_mode)) { + auth_inode = igrab(&vnode->vfs_inode); + ASSERT(auth_inode != NULL); + } else { + auth_inode = afs_iget(vnode->vfs_inode.i_sb, key, + &vnode->status.parent, NULL, NULL); + if (IS_ERR(auth_inode)) + return ERR_PTR(PTR_ERR(auth_inode)); + } + + auth_vnode = AFS_FS_I(auth_inode); + _leave(" = {%x}", auth_vnode->fid.vnode); + return auth_vnode; +} + +/* + * clear the permit cache on a directory vnode + */ +void afs_clear_permits(struct afs_vnode *vnode) +{ + struct afs_permits *permits; + + _enter("{%x}", vnode->fid.vnode); + + mutex_lock(&vnode->permits_lock); + permits = vnode->permits; + rcu_assign_pointer(vnode->permits, NULL); + mutex_unlock(&vnode->permits_lock); + + if (permits) + call_rcu(&permits->rcu, afs_zap_permits); + _leave(""); +} + +/* + * add the result obtained for a vnode to its or its parent directory's cache + * for the key used to access it + */ +void afs_cache_permit(struct afs_vnode *vnode, struct key *key, long acl_order) +{ + struct afs_permits *permits, *xpermits; + struct afs_permit *permit; + struct afs_vnode *auth_vnode; + int count, loop; + + _enter("{%x},%x,%lx", vnode->fid.vnode, key_serial(key), acl_order); + + auth_vnode = afs_get_auth_inode(vnode, key); + if (IS_ERR(auth_vnode)) { + _leave(" [get error %ld]", PTR_ERR(auth_vnode)); + return; + } + + mutex_lock(&auth_vnode->permits_lock); + + /* guard against a rename being detected whilst we waited for the + * lock */ + if (memcmp(&auth_vnode->fid, &vnode->status.parent, + sizeof(struct afs_fid)) != 0) { + _debug("renamed"); + goto out_unlock; + } + + /* have to be careful as the directory's callback may be broken between + * us receiving the status we're trying to cache and us getting the + * lock to update the cache for the status */ + if (auth_vnode->acl_order - acl_order > 0) { + _debug("ACL changed?"); + goto out_unlock; + } + + /* always update the anonymous mask */ + _debug("anon access %x", vnode->status.anon_access); + auth_vnode->status.anon_access = vnode->status.anon_access; + if (key == vnode->volume->cell->anonymous_key) + goto out_unlock; + + xpermits = auth_vnode->permits; + count = 0; + if (xpermits) { + /* see if the permit is already in the list + * - if it is then we just amend the list + */ + count = xpermits->count; + permit = xpermits->permits; + for (loop = count; loop > 0; loop--) { + if (permit->key == key) { + permit->access_mask = + vnode->status.caller_access; + goto out_unlock; + } + permit++; + } + } + + permits = kmalloc(sizeof(*permits) + sizeof(*permit) * (count + 1), + GFP_NOFS); + if (!permits) + goto out_unlock; + + memcpy(permits->permits, xpermits->permits, + count * sizeof(struct afs_permit)); + + _debug("key %x access %x", + key_serial(key), vnode->status.caller_access); + permits->permits[count].access_mask = vnode->status.caller_access; + permits->permits[count].key = key_get(key); + permits->count = count + 1; + + rcu_assign_pointer(auth_vnode->permits, permits); + if (xpermits) + call_rcu(&xpermits->rcu, afs_dispose_of_permits); + +out_unlock: + mutex_unlock(&auth_vnode->permits_lock); + iput(&auth_vnode->vfs_inode); + _leave(""); +} + +/* + * check with the fileserver to see if the directory or parent directory is + * permitted to be accessed with this authorisation, and if so, what access it + * is granted + */ +static int afs_check_permit(struct afs_vnode *vnode, struct key *key, + afs_access_t *_access) +{ + struct afs_permits *permits; + struct afs_permit *permit; + struct afs_vnode *auth_vnode; + bool valid; + int loop, ret; + + _enter(""); + + auth_vnode = afs_get_auth_inode(vnode, key); + if (IS_ERR(auth_vnode)) { + *_access = 0; + _leave(" = %ld", PTR_ERR(auth_vnode)); + return PTR_ERR(auth_vnode); + } + + ASSERT(S_ISDIR(auth_vnode->vfs_inode.i_mode)); + + /* check the permits to see if we've got one yet */ + if (key == auth_vnode->volume->cell->anonymous_key) { + _debug("anon"); + *_access = auth_vnode->status.anon_access; + valid = true; + } else { + valid = false; + rcu_read_lock(); + permits = rcu_dereference(auth_vnode->permits); + if (permits) { + permit = permits->permits; + for (loop = permits->count; loop > 0; loop--) { + if (permit->key == key) { + _debug("found in cache"); + *_access = permit->access_mask; + valid = true; + break; + } + permit++; + } + } + rcu_read_unlock(); + } + + if (!valid) { + /* check the status on the file we're actually interested in + * (the post-processing will cache the result on auth_vnode) */ + _debug("no valid permit"); + + set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags); + ret = afs_vnode_fetch_status(vnode, auth_vnode, key); + if (ret < 0) { + iput(&auth_vnode->vfs_inode); + *_access = 0; + _leave(" = %d", ret); + return ret; + } + } + + *_access = vnode->status.caller_access; + iput(&auth_vnode->vfs_inode); + _leave(" = 0 [access %x]", *_access); + return 0; +} + +/* + * check the permissions on an AFS file + * - AFS ACLs are attached to directories only, and a file is controlled by its + * parent directory's ACL + */ +int afs_permission(struct inode *inode, int mask, struct nameidata *nd) +{ + struct afs_vnode *vnode = AFS_FS_I(inode); + afs_access_t access; + struct key *key; + int ret; + + _enter("{{%x:%x},%lx},%x,", + vnode->fid.vid, vnode->fid.vnode, vnode->flags, mask); + + key = afs_request_key(vnode->volume->cell); + if (IS_ERR(key)) { + _leave(" = %ld [key]", PTR_ERR(key)); + return PTR_ERR(key); + } + + /* if the promise has expired, we need to check the server again */ + if (!vnode->cb_promised) { + _debug("not promised"); + ret = afs_vnode_fetch_status(vnode, NULL, key); + if (ret < 0) + goto error; + _debug("new promise [fl=%lx]", vnode->flags); + } + + /* check the permits to see if we've got one yet */ + ret = afs_check_permit(vnode, key, &access); + if (ret < 0) + goto error; + + /* interpret the access mask */ + _debug("REQ %x ACC %x on %s", + mask, access, S_ISDIR(inode->i_mode) ? "dir" : "file"); + + if (S_ISDIR(inode->i_mode)) { + if (mask & MAY_EXEC) { + if (!(access & AFS_ACE_LOOKUP)) + goto permission_denied; + } else if (mask & MAY_READ) { + if (!(access & AFS_ACE_READ)) + goto permission_denied; + } else if (mask & MAY_WRITE) { + if (!(access & (AFS_ACE_DELETE | /* rmdir, unlink, rename from */ + AFS_ACE_INSERT | /* create, mkdir, symlink, rename to */ + AFS_ACE_WRITE))) /* chmod */ + goto permission_denied; + } else { + BUG(); + } + } else { + if (!(access & AFS_ACE_LOOKUP)) + goto permission_denied; + if (mask & (MAY_EXEC | MAY_READ)) { + if (!(access & AFS_ACE_READ)) + goto permission_denied; + } else if (mask & MAY_WRITE) { + if (!(access & AFS_ACE_WRITE)) + goto permission_denied; + } + } + + key_put(key); + ret = generic_permission(inode, mask, NULL); + _leave(" = %d", ret); + return ret; + +permission_denied: + ret = -EACCES; +error: + key_put(key); + _leave(" = %d", ret); + return ret; +} diff --git a/fs/afs/server.c b/fs/afs/server.c index 44aff81..96bb23b 100644 --- a/fs/afs/server.c +++ b/fs/afs/server.c @@ -1,6 +1,6 @@ -/* server.c: AFS server record management +/* AFS server record management * - * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. + * Copyright (C) 2002, 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 @@ -11,489 +11,314 @@ #include <linux/sched.h> #include <linux/slab.h> -#include <rxrpc/peer.h> -#include <rxrpc/connection.h> -#include "volume.h" -#include "cell.h" -#include "server.h" -#include "transport.h" -#include "vlclient.h" -#include "kafstimod.h" #include "internal.h" -DEFINE_SPINLOCK(afs_server_peer_lock); +unsigned afs_server_timeout = 10; /* server timeout in seconds */ -#define FS_SERVICE_ID 1 /* AFS Volume Location Service ID */ -#define VL_SERVICE_ID 52 /* AFS Volume Location Service ID */ +static void afs_reap_server(struct work_struct *); -static void __afs_server_timeout(struct afs_timer *timer) +/* tree of all the servers, indexed by IP address */ +static struct rb_root afs_servers = RB_ROOT; +static DEFINE_RWLOCK(afs_servers_lock); + +/* LRU list of all the servers not currently in use */ +static LIST_HEAD(afs_server_graveyard); +static DEFINE_SPINLOCK(afs_server_graveyard_lock); +static DECLARE_DELAYED_WORK(afs_server_reaper, afs_reap_server); + +/* + * install a server record in the master tree + */ +static int afs_install_server(struct afs_server *server) { - struct afs_server *server = - list_entry(timer, struct afs_server, timeout); + struct afs_server *xserver; + struct rb_node **pp, *p; + int ret; - _debug("SERVER TIMEOUT [%p{u=%d}]", - server, atomic_read(&server->usage)); + _enter("%p", server); - afs_server_do_timeout(server); -} + write_lock(&afs_servers_lock); + + ret = -EEXIST; + pp = &afs_servers.rb_node; + p = NULL; + while (*pp) { + p = *pp; + _debug("- consider %p", p); + xserver = rb_entry(p, struct afs_server, master_rb); + if (server->addr.s_addr < xserver->addr.s_addr) + pp = &(*pp)->rb_left; + else if (server->addr.s_addr > xserver->addr.s_addr) + pp = &(*pp)->rb_right; + else + goto error; + } -static const struct afs_timer_ops afs_server_timer_ops = { - .timed_out = __afs_server_timeout, -}; + rb_link_node(&server->master_rb, p, pp); + rb_insert_color(&server->master_rb, &afs_servers); + ret = 0; + +error: + write_unlock(&afs_servers_lock); + return ret; +} -/*****************************************************************************/ /* - * lookup a server record in a cell - * - TODO: search the cell's server list + * allocate a new server record */ -int afs_server_lookup(struct afs_cell *cell, const struct in_addr *addr, - struct afs_server **_server) +static struct afs_server *afs_alloc_server(struct afs_cell *cell, + const struct in_addr *addr) { - struct afs_server *server, *active, *zombie; - int loop; + struct afs_server *server; - _enter("%p,%08x,", cell, ntohl(addr->s_addr)); + _enter(""); - /* allocate and initialise a server record */ server = kzalloc(sizeof(struct afs_server), GFP_KERNEL); - if (!server) { - _leave(" = -ENOMEM"); - return -ENOMEM; + if (server) { + atomic_set(&server->usage, 1); + server->cell = cell; + + INIT_LIST_HEAD(&server->link); + INIT_LIST_HEAD(&server->grave); + init_rwsem(&server->sem); + spin_lock_init(&server->fs_lock); + server->fs_vnodes = RB_ROOT; + server->cb_promises = RB_ROOT; + spin_lock_init(&server->cb_lock); + init_waitqueue_head(&server->cb_break_waitq); + INIT_DELAYED_WORK(&server->cb_break_work, + afs_dispatch_give_up_callbacks); + + memcpy(&server->addr, addr, sizeof(struct in_addr)); + server->addr.s_addr = addr->s_addr; } - atomic_set(&server->usage, 1); - - INIT_LIST_HEAD(&server->link); - init_rwsem(&server->sem); - INIT_LIST_HEAD(&server->fs_callq); - spin_lock_init(&server->fs_lock); - INIT_LIST_HEAD(&server->cb_promises); - spin_lock_init(&server->cb_lock); - - for (loop = 0; loop < AFS_SERVER_CONN_LIST_SIZE; loop++) - server->fs_conn_cnt[loop] = 4; + _leave(" = %p{%d}", server, atomic_read(&server->usage)); + return server; +} - memcpy(&server->addr, addr, sizeof(struct in_addr)); - server->addr.s_addr = addr->s_addr; +/* + * get an FS-server record for a cell + */ +struct afs_server *afs_lookup_server(struct afs_cell *cell, + const struct in_addr *addr) +{ + struct afs_server *server, *candidate; - afs_timer_init(&server->timeout, &afs_server_timer_ops); + _enter("%p,"NIPQUAD_FMT, cell, NIPQUAD(addr->s_addr)); - /* add to the cell */ - write_lock(&cell->sv_lock); + /* quick scan of the list to see if we already have the server */ + read_lock(&cell->servers_lock); - /* check the active list */ - list_for_each_entry(active, &cell->sv_list, link) { - if (active->addr.s_addr == addr->s_addr) - goto use_active_server; + list_for_each_entry(server, &cell->servers, link) { + if (server->addr.s_addr == addr->s_addr) + goto found_server_quickly; } + read_unlock(&cell->servers_lock); - /* check the inactive list */ - spin_lock(&cell->sv_gylock); - list_for_each_entry(zombie, &cell->sv_graveyard, link) { - if (zombie->addr.s_addr == addr->s_addr) - goto resurrect_server; + candidate = afs_alloc_server(cell, addr); + if (!candidate) { + _leave(" = -ENOMEM"); + return ERR_PTR(-ENOMEM); } - spin_unlock(&cell->sv_gylock); - afs_get_cell(cell); - server->cell = cell; - list_add_tail(&server->link, &cell->sv_list); + write_lock(&cell->servers_lock); - write_unlock(&cell->sv_lock); + /* check the cell's server list again */ + list_for_each_entry(server, &cell->servers, link) { + if (server->addr.s_addr == addr->s_addr) + goto found_server; + } - *_server = server; - _leave(" = 0 (%p)", server); - return 0; + _debug("new"); + server = candidate; + if (afs_install_server(server) < 0) + goto server_in_two_cells; - /* found a matching active server */ - use_active_server: - _debug("active server"); - afs_get_server(active); - write_unlock(&cell->sv_lock); + afs_get_cell(cell); + list_add_tail(&server->link, &cell->servers); + + write_unlock(&cell->servers_lock); + _leave(" = %p{%d}", server, atomic_read(&server->usage)); + return server; + + /* found a matching server quickly */ +found_server_quickly: + _debug("found quickly"); + afs_get_server(server); + read_unlock(&cell->servers_lock); +no_longer_unused: + if (!list_empty(&server->grave)) { + spin_lock(&afs_server_graveyard_lock); + list_del_init(&server->grave); + spin_unlock(&afs_server_graveyard_lock); + } + _leave(" = %p{%d}", server, atomic_read(&server->usage)); + return server; + + /* found a matching server on the second pass */ +found_server: + _debug("found"); + afs_get_server(server); + write_unlock(&cell->servers_lock); + kfree(candidate); + goto no_longer_unused; + + /* found a server that seems to be in two cells */ +server_in_two_cells: + write_unlock(&cell->servers_lock); + kfree(candidate); + printk(KERN_NOTICE "kAFS:" + " Server "NIPQUAD_FMT" appears to be in two cells\n", + NIPQUAD(*addr)); + _leave(" = -EEXIST"); + return ERR_PTR(-EEXIST); +} - kfree(server); +/* + * look up a server by its IP address + */ +struct afs_server *afs_find_server(const struct in_addr *_addr) +{ + struct afs_server *server = NULL; + struct rb_node *p; + struct in_addr addr = *_addr; - *_server = active; - _leave(" = 0 (%p)", active); - return 0; + _enter(NIPQUAD_FMT, NIPQUAD(addr.s_addr)); - /* found a matching server in the graveyard, so resurrect it and - * dispose of the new record */ - resurrect_server: - _debug("resurrecting server"); + read_lock(&afs_servers_lock); - list_move_tail(&zombie->link, &cell->sv_list); - afs_get_server(zombie); - afs_kafstimod_del_timer(&zombie->timeout); - spin_unlock(&cell->sv_gylock); - write_unlock(&cell->sv_lock); + p = afs_servers.rb_node; + while (p) { + server = rb_entry(p, struct afs_server, master_rb); - kfree(server); + _debug("- consider %p", p); - *_server = zombie; - _leave(" = 0 (%p)", zombie); - return 0; + if (addr.s_addr < server->addr.s_addr) { + p = p->rb_left; + } else if (addr.s_addr > server->addr.s_addr) { + p = p->rb_right; + } else { + afs_get_server(server); + goto found; + } + } -} /* end afs_server_lookup() */ + server = NULL; +found: + read_unlock(&afs_servers_lock); + ASSERTIFCMP(server, server->addr.s_addr, ==, addr.s_addr); + _leave(" = %p", server); + return server; +} -/*****************************************************************************/ /* * destroy a server record * - removes from the cell list */ void afs_put_server(struct afs_server *server) { - struct afs_cell *cell; - if (!server) return; - _enter("%p", server); - - cell = server->cell; + _enter("%p{%d}", server, atomic_read(&server->usage)); - /* sanity check */ - BUG_ON(atomic_read(&server->usage) <= 0); + _debug("PUT SERVER %d", atomic_read(&server->usage)); - /* to prevent a race, the decrement and the dequeue must be effectively - * atomic */ - write_lock(&cell->sv_lock); + ASSERTCMP(atomic_read(&server->usage), >, 0); if (likely(!atomic_dec_and_test(&server->usage))) { - write_unlock(&cell->sv_lock); _leave(""); return; } - spin_lock(&cell->sv_gylock); - list_move_tail(&server->link, &cell->sv_graveyard); + afs_flush_callback_breaks(server); - /* time out in 10 secs */ - afs_kafstimod_add_timer(&server->timeout, 10 * HZ); - - spin_unlock(&cell->sv_gylock); - write_unlock(&cell->sv_lock); - - _leave(" [killed]"); -} /* end afs_put_server() */ + spin_lock(&afs_server_graveyard_lock); + if (atomic_read(&server->usage) == 0) { + list_move_tail(&server->grave, &afs_server_graveyard); + server->time_of_death = get_seconds(); + schedule_delayed_work(&afs_server_reaper, + afs_server_timeout * HZ); + } + spin_unlock(&afs_server_graveyard_lock); + _leave(" [dead]"); +} -/*****************************************************************************/ /* - * timeout server record - * - removes from the cell's graveyard if the usage count is zero + * destroy a dead server */ -void afs_server_do_timeout(struct afs_server *server) +static void afs_destroy_server(struct afs_server *server) { - struct rxrpc_peer *peer; - struct afs_cell *cell; - int loop; - _enter("%p", server); - cell = server->cell; - - BUG_ON(atomic_read(&server->usage) < 0); - - /* remove from graveyard if still dead */ - spin_lock(&cell->vl_gylock); - if (atomic_read(&server->usage) == 0) - list_del_init(&server->link); - else - server = NULL; - spin_unlock(&cell->vl_gylock); - - if (!server) { - _leave(""); - return; /* resurrected */ - } - - /* we can now destroy it properly */ - afs_put_cell(cell); - - /* uncross-point the structs under a global lock */ - spin_lock(&afs_server_peer_lock); - peer = server->peer; - if (peer) { - server->peer = NULL; - peer->user = NULL; - } - spin_unlock(&afs_server_peer_lock); - - /* finish cleaning up the server */ - for (loop = AFS_SERVER_CONN_LIST_SIZE - 1; loop >= 0; loop--) - if (server->fs_conn[loop]) - rxrpc_put_connection(server->fs_conn[loop]); - - if (server->vlserver) - rxrpc_put_connection(server->vlserver); + ASSERTCMP(server->fs_vnodes.rb_node, ==, NULL); + ASSERTCMP(server->cb_promises.rb_node, ==, NULL); + ASSERTCMP(server->cb_break_head, ==, server->cb_break_tail); + ASSERTCMP(atomic_read(&server->cb_break_n), ==, 0); + afs_put_cell(server->cell); kfree(server); +} - _leave(" [destroyed]"); -} /* end afs_server_do_timeout() */ - -/*****************************************************************************/ /* - * get a callslot on a connection to the fileserver on the specified server + * reap dead server records */ -int afs_server_request_callslot(struct afs_server *server, - struct afs_server_callslot *callslot) +static void afs_reap_server(struct work_struct *work) { - struct afs_server_callslot *pcallslot; - struct rxrpc_connection *conn; - int nconn, ret; - - _enter("%p,",server); - - INIT_LIST_HEAD(&callslot->link); - callslot->task = current; - callslot->conn = NULL; - callslot->nconn = -1; - callslot->ready = 0; - - ret = 0; - conn = NULL; - - /* get hold of a callslot first */ - spin_lock(&server->fs_lock); - - /* resurrect the server if it's death timeout has expired */ - if (server->fs_state) { - if (time_before(jiffies, server->fs_dead_jif)) { - ret = server->fs_state; - spin_unlock(&server->fs_lock); - _leave(" = %d [still dead]", ret); - return ret; + LIST_HEAD(corpses); + struct afs_server *server; + unsigned long delay, expiry; + time_t now; + + now = get_seconds(); + spin_lock(&afs_server_graveyard_lock); + + while (!list_empty(&afs_server_graveyard)) { + server = list_entry(afs_server_graveyard.next, + struct afs_server, grave); + + /* the queue is ordered most dead first */ + expiry = server->time_of_death + afs_server_timeout; + if (expiry > now) { + delay = (expiry - now) * HZ; + if (!schedule_delayed_work(&afs_server_reaper, delay)) { + cancel_delayed_work(&afs_server_reaper); + schedule_delayed_work(&afs_server_reaper, + delay); + } + break; } - server->fs_state = 0; - } - - /* try and find a connection that has spare callslots */ - for (nconn = 0; nconn < AFS_SERVER_CONN_LIST_SIZE; nconn++) { - if (server->fs_conn_cnt[nconn] > 0) { - server->fs_conn_cnt[nconn]--; - spin_unlock(&server->fs_lock); - callslot->nconn = nconn; - goto obtained_slot; + write_lock(&server->cell->servers_lock); + write_lock(&afs_servers_lock); + if (atomic_read(&server->usage) > 0) { + list_del_init(&server->grave); + } else { + list_move_tail(&server->grave, &corpses); + list_del_init(&server->link); + rb_erase(&server->master_rb, &afs_servers); } + write_unlock(&afs_servers_lock); + write_unlock(&server->cell->servers_lock); } - /* none were available - wait interruptibly for one to become - * available */ - set_current_state(TASK_INTERRUPTIBLE); - list_add_tail(&callslot->link, &server->fs_callq); - spin_unlock(&server->fs_lock); - - while (!callslot->ready && !signal_pending(current)) { - schedule(); - set_current_state(TASK_INTERRUPTIBLE); - } - - set_current_state(TASK_RUNNING); - - /* even if we were interrupted we may still be queued */ - if (!callslot->ready) { - spin_lock(&server->fs_lock); - list_del_init(&callslot->link); - spin_unlock(&server->fs_lock); - } - - nconn = callslot->nconn; + spin_unlock(&afs_server_graveyard_lock); - /* if interrupted, we must release any slot we also got before - * returning an error */ - if (signal_pending(current)) { - ret = -EINTR; - goto error_release; + /* now reap the corpses we've extracted */ + while (!list_empty(&corpses)) { + server = list_entry(corpses.next, struct afs_server, grave); + list_del(&server->grave); + afs_destroy_server(server); } +} - /* if we were woken up with an error, then pass that error back to the - * called */ - if (nconn < 0) { - _leave(" = %d", callslot->errno); - return callslot->errno; - } - - /* were we given a connection directly? */ - if (callslot->conn) { - /* yes - use it */ - _leave(" = 0 (nc=%d)", nconn); - return 0; - } - - /* got a callslot, but no connection */ - obtained_slot: - - /* need to get hold of the RxRPC connection */ - down_write(&server->sem); - - /* quick check to see if there's an outstanding error */ - ret = server->fs_state; - if (ret) - goto error_release_upw; - - if (server->fs_conn[nconn]) { - /* reuse an existing connection */ - rxrpc_get_connection(server->fs_conn[nconn]); - callslot->conn = server->fs_conn[nconn]; - } - else { - /* create a new connection */ - ret = rxrpc_create_connection(afs_transport, - htons(7000), - server->addr.s_addr, - FS_SERVICE_ID, - NULL, - &server->fs_conn[nconn]); - - if (ret < 0) - goto error_release_upw; - - callslot->conn = server->fs_conn[0]; - rxrpc_get_connection(callslot->conn); - } - - up_write(&server->sem); - - _leave(" = 0"); - return 0; - - /* handle an error occurring */ - error_release_upw: - up_write(&server->sem); - - error_release: - /* either release the callslot or pass it along to another deserving - * task */ - spin_lock(&server->fs_lock); - - if (nconn < 0) { - /* no callslot allocated */ - } - else if (list_empty(&server->fs_callq)) { - /* no one waiting */ - server->fs_conn_cnt[nconn]++; - spin_unlock(&server->fs_lock); - } - else { - /* someone's waiting - dequeue them and wake them up */ - pcallslot = list_entry(server->fs_callq.next, - struct afs_server_callslot, link); - list_del_init(&pcallslot->link); - - pcallslot->errno = server->fs_state; - if (!pcallslot->errno) { - /* pass them out callslot details */ - callslot->conn = xchg(&pcallslot->conn, - callslot->conn); - pcallslot->nconn = nconn; - callslot->nconn = nconn = -1; - } - pcallslot->ready = 1; - wake_up_process(pcallslot->task); - spin_unlock(&server->fs_lock); - } - - rxrpc_put_connection(callslot->conn); - callslot->conn = NULL; - - _leave(" = %d", ret); - return ret; - -} /* end afs_server_request_callslot() */ - -/*****************************************************************************/ -/* - * release a callslot back to the server - * - transfers the RxRPC connection to the next pending callslot if possible - */ -void afs_server_release_callslot(struct afs_server *server, - struct afs_server_callslot *callslot) -{ - struct afs_server_callslot *pcallslot; - - _enter("{ad=%08x,cnt=%u},{%d}", - ntohl(server->addr.s_addr), - server->fs_conn_cnt[callslot->nconn], - callslot->nconn); - - BUG_ON(callslot->nconn < 0); - - spin_lock(&server->fs_lock); - - if (list_empty(&server->fs_callq)) { - /* no one waiting */ - server->fs_conn_cnt[callslot->nconn]++; - spin_unlock(&server->fs_lock); - } - else { - /* someone's waiting - dequeue them and wake them up */ - pcallslot = list_entry(server->fs_callq.next, - struct afs_server_callslot, link); - list_del_init(&pcallslot->link); - - pcallslot->errno = server->fs_state; - if (!pcallslot->errno) { - /* pass them out callslot details */ - callslot->conn = xchg(&pcallslot->conn, callslot->conn); - pcallslot->nconn = callslot->nconn; - callslot->nconn = -1; - } - - pcallslot->ready = 1; - wake_up_process(pcallslot->task); - spin_unlock(&server->fs_lock); - } - - rxrpc_put_connection(callslot->conn); - - _leave(""); -} /* end afs_server_release_callslot() */ - -/*****************************************************************************/ /* - * get a handle to a connection to the vlserver (volume location) on the - * specified server + * discard all the server records for rmmod */ -int afs_server_get_vlconn(struct afs_server *server, - struct rxrpc_connection **_conn) +void __exit afs_purge_servers(void) { - struct rxrpc_connection *conn; - int ret; - - _enter("%p,", server); - - ret = 0; - conn = NULL; - down_read(&server->sem); - - if (server->vlserver) { - /* reuse an existing connection */ - rxrpc_get_connection(server->vlserver); - conn = server->vlserver; - up_read(&server->sem); - } - else { - /* create a new connection */ - up_read(&server->sem); - down_write(&server->sem); - if (!server->vlserver) { - ret = rxrpc_create_connection(afs_transport, - htons(7003), - server->addr.s_addr, - VL_SERVICE_ID, - NULL, - &server->vlserver); - } - if (ret == 0) { - rxrpc_get_connection(server->vlserver); - conn = server->vlserver; - } - up_write(&server->sem); - } - - *_conn = conn; - _leave(" = %d", ret); - return ret; -} /* end afs_server_get_vlconn() */ + afs_server_timeout = 0; + cancel_delayed_work(&afs_server_reaper); + schedule_delayed_work(&afs_server_reaper, 0); +} diff --git a/fs/afs/server.h b/fs/afs/server.h deleted file mode 100644 index c3d2411..0000000 --- a/fs/afs/server.h +++ /dev/null @@ -1,102 +0,0 @@ -/* server.h: AFS server record - * - * Copyright (C) 2002 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. - */ - -#ifndef _LINUX_AFS_SERVER_H -#define _LINUX_AFS_SERVER_H - -#include "types.h" -#include "kafstimod.h" -#include <rxrpc/peer.h> -#include <linux/rwsem.h> - -extern spinlock_t afs_server_peer_lock; - -/*****************************************************************************/ -/* - * AFS server record - */ -struct afs_server -{ - atomic_t usage; - struct afs_cell *cell; /* cell in which server resides */ - struct list_head link; /* link in cell's server list */ - struct rw_semaphore sem; /* access lock */ - struct afs_timer timeout; /* graveyard timeout */ - struct in_addr addr; /* server address */ - struct rxrpc_peer *peer; /* peer record for this server */ - struct rxrpc_connection *vlserver; /* connection to the volume location service */ - - /* file service access */ -#define AFS_SERVER_CONN_LIST_SIZE 2 - struct rxrpc_connection *fs_conn[AFS_SERVER_CONN_LIST_SIZE]; /* FS connections */ - unsigned fs_conn_cnt[AFS_SERVER_CONN_LIST_SIZE]; /* per conn call count */ - struct list_head fs_callq; /* queue of processes waiting to make a call */ - spinlock_t fs_lock; /* access lock */ - int fs_state; /* 0 or reason FS currently marked dead (-errno) */ - unsigned fs_rtt; /* FS round trip time */ - unsigned long fs_act_jif; /* time at which last activity occurred */ - unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ - - /* callback promise management */ - struct list_head cb_promises; /* as yet unbroken promises from this server */ - spinlock_t cb_lock; /* access lock */ -}; - -extern int afs_server_lookup(struct afs_cell *cell, - const struct in_addr *addr, - struct afs_server **_server); - -#define afs_get_server(S) do { atomic_inc(&(S)->usage); } while(0) - -extern void afs_put_server(struct afs_server *server); -extern void afs_server_do_timeout(struct afs_server *server); - -extern int afs_server_find_by_peer(const struct rxrpc_peer *peer, - struct afs_server **_server); - -extern int afs_server_get_vlconn(struct afs_server *server, - struct rxrpc_connection **_conn); - -static inline -struct afs_server *afs_server_get_from_peer(struct rxrpc_peer *peer) -{ - struct afs_server *server; - - spin_lock(&afs_server_peer_lock); - server = peer->user; - if (server) - afs_get_server(server); - spin_unlock(&afs_server_peer_lock); - - return server; -} - -/*****************************************************************************/ -/* - * AFS server callslot grant record - */ -struct afs_server_callslot -{ - struct list_head link; /* link in server's list */ - struct task_struct *task; /* process waiting to make call */ - struct rxrpc_connection *conn; /* connection to use (or NULL on error) */ - short nconn; /* connection slot number (-1 on error) */ - char ready; /* T when ready */ - int errno; /* error number if nconn==-1 */ -}; - -extern int afs_server_request_callslot(struct afs_server *server, - struct afs_server_callslot *callslot); - -extern void afs_server_release_callslot(struct afs_server *server, - struct afs_server_callslot *callslot); - -#endif /* _LINUX_AFS_SERVER_H */ diff --git a/fs/afs/super.c b/fs/afs/super.c index eb7e323..cebd03c 100644 --- a/fs/afs/super.c +++ b/fs/afs/super.c @@ -1,5 +1,6 @@ -/* - * Copyright (c) 2002 Red Hat, Inc. All rights reserved. +/* AFS superblock handling + * + * Copyright (c) 2002, 2007 Red Hat, Inc. All rights reserved. * * This software may be freely redistributed under the terms of the * GNU General Public License. @@ -9,7 +10,7 @@ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * Authors: David Howells <dhowells@redhat.com> - * David Woodhouse <dwmw2@cambridge.redhat.com> + * David Woodhouse <dwmw2@redhat.com> * */ @@ -19,22 +20,10 @@ #include <linux/slab.h> #include <linux/fs.h> #include <linux/pagemap.h> -#include "vnode.h" -#include "volume.h" -#include "cell.h" -#include "cmservice.h" -#include "fsclient.h" -#include "super.h" #include "internal.h" #define AFS_FS_MAGIC 0x6B414653 /* 'kAFS' */ -struct afs_mount_params { - int rwpath; - struct afs_cell *default_cell; - struct afs_volume *volume; -}; - static void afs_i_init_once(void *foo, struct kmem_cache *cachep, unsigned long flags); @@ -62,13 +51,13 @@ static const struct super_operations afs_super_ops = { .drop_inode = generic_delete_inode, .destroy_inode = afs_destroy_inode, .clear_inode = afs_clear_inode, + .umount_begin = afs_umount_begin, .put_super = afs_put_super, }; static struct kmem_cache *afs_inode_cachep; static atomic_t afs_count_active_inodes; -/*****************************************************************************/ /* * initialise the filesystem */ @@ -78,8 +67,6 @@ int __init afs_fs_init(void) _enter(""); - afs_timer_init(&afs_mntpt_expiry_timer, &afs_mntpt_expiry_timer_ops); - /* create ourselves an inode cache */ atomic_set(&afs_count_active_inodes, 0); @@ -99,20 +86,22 @@ int __init afs_fs_init(void) ret = register_filesystem(&afs_fs_type); if (ret < 0) { kmem_cache_destroy(afs_inode_cachep); - kleave(" = %d", ret); + _leave(" = %d", ret); return ret; } - kleave(" = 0"); + _leave(" = 0"); return 0; -} /* end afs_fs_init() */ +} -/*****************************************************************************/ /* * clean up the filesystem */ void __exit afs_fs_exit(void) { + _enter(""); + + afs_mntpt_kill_timer(); unregister_filesystem(&afs_fs_type); if (atomic_read(&afs_count_active_inodes) != 0) { @@ -122,10 +111,9 @@ void __exit afs_fs_exit(void) } kmem_cache_destroy(afs_inode_cachep); + _leave(""); +} -} /* end afs_fs_exit() */ - -/*****************************************************************************/ /* * check that an argument has a value */ @@ -136,9 +124,8 @@ static int want_arg(char **_value, const char *option) return 0; } return 1; -} /* end want_arg() */ +} -/*****************************************************************************/ /* * check that there's no subsequent value */ @@ -150,18 +137,17 @@ static int want_no_value(char *const *_value, const char *option) return 0; } return 1; -} /* end want_no_value() */ +} -/*****************************************************************************/ /* * parse the mount options * - this function has been shamelessly adapted from the ext3 fs which * shamelessly adapted it from the msdos fs */ -static int afs_super_parse_options(struct afs_mount_params *params, - char *options, - const char **devname) +static int afs_parse_options(struct afs_mount_params *params, + char *options, const char **devname) { + struct afs_cell *cell; char *key, *value; int ret; @@ -170,51 +156,135 @@ static int afs_super_parse_options(struct afs_mount_params *params, options[PAGE_SIZE - 1] = 0; ret = 0; - while ((key = strsep(&options, ",")) != 0) - { + while ((key = strsep(&options, ","))) { value = strchr(key, '='); if (value) *value++ = 0; - printk("kAFS: KEY: %s, VAL:%s\n", key, value ?: "-"); + _debug("kAFS: KEY: %s, VAL:%s", key, value ?: "-"); if (strcmp(key, "rwpath") == 0) { if (!want_no_value(&value, "rwpath")) return -EINVAL; params->rwpath = 1; - continue; - } - else if (strcmp(key, "vol") == 0) { + } else if (strcmp(key, "vol") == 0) { if (!want_arg(&value, "vol")) return -EINVAL; *devname = value; - continue; - } - else if (strcmp(key, "cell") == 0) { + } else if (strcmp(key, "cell") == 0) { if (!want_arg(&value, "cell")) return -EINVAL; - afs_put_cell(params->default_cell); - ret = afs_cell_lookup(value, - strlen(value), - ¶ms->default_cell); - if (ret < 0) - return -EINVAL; - continue; + cell = afs_cell_lookup(value, strlen(value)); + if (IS_ERR(cell)) + return PTR_ERR(cell); + afs_put_cell(params->cell); + params->cell = cell; + } else { + printk("kAFS: Unknown mount option: '%s'\n", key); + ret = -EINVAL; + goto error; } - - printk("kAFS: Unknown mount option: '%s'\n", key); - ret = -EINVAL; - goto error; } ret = 0; - - error: +error: _leave(" = %d", ret); return ret; -} /* end afs_super_parse_options() */ +} + +/* + * parse a device name to get cell name, volume name, volume type and R/W + * selector + * - this can be one of the following: + * "%[cell:]volume[.]" R/W volume + * "#[cell:]volume[.]" R/O or R/W volume (rwpath=0), + * or R/W (rwpath=1) volume + * "%[cell:]volume.readonly" R/O volume + * "#[cell:]volume.readonly" R/O volume + * "%[cell:]volume.backup" Backup volume + * "#[cell:]volume.backup" Backup volume + */ +static int afs_parse_device_name(struct afs_mount_params *params, + const char *name) +{ + struct afs_cell *cell; + const char *cellname, *suffix; + int cellnamesz; + + _enter(",%s", name); + + if (!name) { + printk(KERN_ERR "kAFS: no volume name specified\n"); + return -EINVAL; + } + + if ((name[0] != '%' && name[0] != '#') || !name[1]) { + printk(KERN_ERR "kAFS: unparsable volume name\n"); + return -EINVAL; + } + + /* determine the type of volume we're looking for */ + params->type = AFSVL_ROVOL; + params->force = false; + if (params->rwpath || name[0] == '%') { + params->type = AFSVL_RWVOL; + params->force = true; + } + name++; + + /* split the cell name out if there is one */ + params->volname = strchr(name, ':'); + if (params->volname) { + cellname = name; + cellnamesz = params->volname - name; + params->volname++; + } else { + params->volname = name; + cellname = NULL; + cellnamesz = 0; + } + + /* the volume type is further affected by a possible suffix */ + suffix = strrchr(params->volname, '.'); + if (suffix) { + if (strcmp(suffix, ".readonly") == 0) { + params->type = AFSVL_ROVOL; + params->force = true; + } else if (strcmp(suffix, ".backup") == 0) { + params->type = AFSVL_BACKVOL; + params->force = true; + } else if (suffix[1] == 0) { + } else { + suffix = NULL; + } + } + + params->volnamesz = suffix ? + suffix - params->volname : strlen(params->volname); + + _debug("cell %*.*s [%p]", + cellnamesz, cellnamesz, cellname ?: "", params->cell); + + /* lookup the cell record */ + if (cellname || !params->cell) { + cell = afs_cell_lookup(cellname, cellnamesz); + if (IS_ERR(cell)) { + printk(KERN_ERR "kAFS: unable to lookup cell '%s'\n", + cellname ?: ""); + return PTR_ERR(cell); + } + afs_put_cell(params->cell); + params->cell = cell; + } + + _debug("CELL:%s [%p] VOLUME:%*.*s SUFFIX:%s TYPE:%d%s", + params->cell->name, params->cell, + params->volnamesz, params->volnamesz, params->volname, + suffix ?: "-", params->type, params->force ? " FORCE" : ""); + + return 0; +} -/*****************************************************************************/ /* * check a superblock to see if it's the one we're looking for */ @@ -224,13 +294,12 @@ static int afs_test_super(struct super_block *sb, void *data) struct afs_super_info *as = sb->s_fs_info; return as->volume == params->volume; -} /* end afs_test_super() */ +} -/*****************************************************************************/ /* * fill in the superblock */ -static int afs_fill_super(struct super_block *sb, void *data, int silent) +static int afs_fill_super(struct super_block *sb, void *data) { struct afs_mount_params *params = data; struct afs_super_info *as = NULL; @@ -239,7 +308,7 @@ static int afs_fill_super(struct super_block *sb, void *data, int silent) struct inode *inode = NULL; int ret; - kenter(""); + _enter(""); /* allocate a superblock info record */ as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL); @@ -262,9 +331,9 @@ static int afs_fill_super(struct super_block *sb, void *data, int silent) fid.vid = as->volume->vid; fid.vnode = 1; fid.unique = 1; - ret = afs_iget(sb, &fid, &inode); - if (ret < 0) - goto error; + inode = afs_iget(sb, params->key, &fid, NULL, NULL); + if (IS_ERR(inode)) + goto error_inode; ret = -ENOMEM; root = d_alloc_root(inode); @@ -273,21 +342,23 @@ static int afs_fill_super(struct super_block *sb, void *data, int silent) sb->s_root = root; - kleave(" = 0"); + _leave(" = 0"); return 0; - error: +error_inode: + ret = PTR_ERR(inode); + inode = NULL; +error: iput(inode); afs_put_volume(as->volume); kfree(as); sb->s_fs_info = NULL; - kleave(" = %d", ret); + _leave(" = %d", ret); return ret; -} /* end afs_fill_super() */ +} -/*****************************************************************************/ /* * get an AFS superblock * - TODO: don't use get_sb_nodev(), but rather call sget() directly @@ -300,69 +371,80 @@ static int afs_get_sb(struct file_system_type *fs_type, { struct afs_mount_params params; struct super_block *sb; + struct afs_volume *vol; + struct key *key; int ret; _enter(",,%s,%p", dev_name, options); memset(¶ms, 0, sizeof(params)); - /* start the cache manager */ - ret = afscm_start(); - if (ret < 0) { - _leave(" = %d", ret); - return ret; - } - - /* parse the options */ + /* parse the options and device name */ if (options) { - ret = afs_super_parse_options(¶ms, options, &dev_name); + ret = afs_parse_options(¶ms, options, &dev_name); if (ret < 0) goto error; - if (!dev_name) { - printk("kAFS: no volume name specified\n"); - ret = -EINVAL; - goto error; - } } - /* parse the device name */ - ret = afs_volume_lookup(dev_name, - params.default_cell, - params.rwpath, - ¶ms.volume); + + ret = afs_parse_device_name(¶ms, dev_name); if (ret < 0) goto error; - /* allocate a deviceless superblock */ - sb = sget(fs_type, afs_test_super, set_anon_super, ¶ms); - if (IS_ERR(sb)) + /* try and do the mount securely */ + key = afs_request_key(params.cell); + if (IS_ERR(key)) { + _leave(" = %ld [key]", PTR_ERR(key)); + ret = PTR_ERR(key); goto error; + } + params.key = key; - sb->s_flags = flags; + /* parse the device name */ + vol = afs_volume_lookup(¶ms); + if (IS_ERR(vol)) { + ret = PTR_ERR(vol); + goto error; + } + params.volume = vol; - ret = afs_fill_super(sb, ¶ms, flags & MS_SILENT ? 1 : 0); - if (ret < 0) { - up_write(&sb->s_umount); - deactivate_super(sb); + /* allocate a deviceless superblock */ + sb = sget(fs_type, afs_test_super, set_anon_super, ¶ms); + if (IS_ERR(sb)) { + ret = PTR_ERR(sb); goto error; } - sb->s_flags |= MS_ACTIVE; - simple_set_mnt(mnt, sb); + if (!sb->s_root) { + /* initial superblock/root creation */ + _debug("create"); + sb->s_flags = flags; + ret = afs_fill_super(sb, ¶ms); + if (ret < 0) { + up_write(&sb->s_umount); + deactivate_super(sb); + goto error; + } + sb->s_flags |= MS_ACTIVE; + } else { + _debug("reuse"); + ASSERTCMP(sb->s_flags, &, MS_ACTIVE); + } + + simple_set_mnt(mnt, sb); afs_put_volume(params.volume); - afs_put_cell(params.default_cell); - _leave(" = 0 [%p]", 0, sb); + afs_put_cell(params.cell); + _leave(" = 0 [%p]", sb); return 0; - error: +error: afs_put_volume(params.volume); - afs_put_cell(params.default_cell); - afscm_stop(); + afs_put_cell(params.cell); + key_put(params.key); _leave(" = %d", ret); return ret; -} /* end afs_get_sb() */ +} -/*****************************************************************************/ /* * finish the unmounting process on the superblock */ @@ -373,35 +455,30 @@ static void afs_put_super(struct super_block *sb) _enter(""); afs_put_volume(as->volume); - afscm_stop(); _leave(""); -} /* end afs_put_super() */ +} -/*****************************************************************************/ /* * initialise an inode cache slab element prior to any use */ static void afs_i_init_once(void *_vnode, struct kmem_cache *cachep, unsigned long flags) { - struct afs_vnode *vnode = (struct afs_vnode *) _vnode; + struct afs_vnode *vnode = _vnode; if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == SLAB_CTOR_CONSTRUCTOR) { memset(vnode, 0, sizeof(*vnode)); inode_init_once(&vnode->vfs_inode); init_waitqueue_head(&vnode->update_waitq); + mutex_init(&vnode->permits_lock); + mutex_init(&vnode->validate_lock); spin_lock_init(&vnode->lock); - INIT_LIST_HEAD(&vnode->cb_link); - INIT_LIST_HEAD(&vnode->cb_hash_link); - afs_timer_init(&vnode->cb_timeout, - &afs_vnode_cb_timed_out_ops); + INIT_WORK(&vnode->cb_broken_work, afs_broken_callback_work); } +} -} /* end afs_i_init_once() */ - -/*****************************************************************************/ /* * allocate an AFS inode struct from our slab cache */ @@ -409,8 +486,7 @@ static struct inode *afs_alloc_inode(struct super_block *sb) { struct afs_vnode *vnode; - vnode = (struct afs_vnode *) - kmem_cache_alloc(afs_inode_cachep, GFP_KERNEL); + vnode = kmem_cache_alloc(afs_inode_cachep, GFP_KERNEL); if (!vnode) return NULL; @@ -421,21 +497,25 @@ static struct inode *afs_alloc_inode(struct super_block *sb) vnode->volume = NULL; vnode->update_cnt = 0; - vnode->flags = 0; + vnode->flags = 1 << AFS_VNODE_UNSET; + vnode->cb_promised = false; return &vnode->vfs_inode; -} /* end afs_alloc_inode() */ +} -/*****************************************************************************/ /* * destroy an AFS inode struct */ static void afs_destroy_inode(struct inode *inode) { + struct afs_vnode *vnode = AFS_FS_I(inode); + _enter("{%lu}", inode->i_ino); - kmem_cache_free(afs_inode_cachep, AFS_FS_I(inode)); + _debug("DESTROY INODE %p", inode); - atomic_dec(&afs_count_active_inodes); + ASSERTCMP(vnode->server, ==, NULL); -} /* end afs_destroy_inode() */ + kmem_cache_free(afs_inode_cachep, vnode); + atomic_dec(&afs_count_active_inodes); +} diff --git a/fs/afs/super.h b/fs/afs/super.h deleted file mode 100644 index 32de8cc..0000000 --- a/fs/afs/super.h +++ /dev/null @@ -1,45 +0,0 @@ -/* super.h: AFS filesystem internal private data - * - * Copyright (c) 2002 Red Hat, Inc. All rights reserved. - * - * This software may be freely redistributed under the terms of the - * GNU General Public License. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * Authors: David Woodhouse <dwmw2@cambridge.redhat.com> - * David Howells <dhowells@redhat.com> - * - */ - -#ifndef _LINUX_AFS_SUPER_H -#define _LINUX_AFS_SUPER_H - -#include <linux/fs.h> -#include "server.h" - -#ifdef __KERNEL__ - -/*****************************************************************************/ -/* - * AFS superblock private data - * - there's one superblock per volume - */ -struct afs_super_info -{ - struct afs_volume *volume; /* volume record */ - char rwparent; /* T if parent is R/W AFS volume */ -}; - -static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) -{ - return sb->s_fs_info; -} - -extern struct file_system_type afs_fs_type; - -#endif /* __KERNEL__ */ - -#endif /* _LINUX_AFS_SUPER_H */ diff --git a/fs/afs/transport.h b/fs/afs/transport.h deleted file mode 100644 index 7013ae6..0000000 --- a/fs/afs/transport.h +++ /dev/null @@ -1,21 +0,0 @@ -/* transport.h: AFS transport management - * - * Copyright (C) 2002 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. - */ - -#ifndef _LINUX_AFS_TRANSPORT_H -#define _LINUX_AFS_TRANSPORT_H - -#include "types.h" -#include <rxrpc/transport.h> - -/* the cache manager transport endpoint */ -extern struct rxrpc_transport *afs_transport; - -#endif /* _LINUX_AFS_TRANSPORT_H */ diff --git a/fs/afs/types.h b/fs/afs/types.h deleted file mode 100644 index b1a2367..0000000 --- a/fs/afs/types.h +++ /dev/null @@ -1,125 +0,0 @@ -/* types.h: AFS types - * - * Copyright (C) 2002 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. - */ - -#ifndef _LINUX_AFS_TYPES_H -#define _LINUX_AFS_TYPES_H - -#ifdef __KERNEL__ -#include <rxrpc/types.h> -#endif /* __KERNEL__ */ - -typedef unsigned afs_volid_t; -typedef unsigned afs_vnodeid_t; -typedef unsigned long long afs_dataversion_t; - -typedef enum { - AFSVL_RWVOL, /* read/write volume */ - AFSVL_ROVOL, /* read-only volume */ - AFSVL_BACKVOL, /* backup volume */ -} __attribute__((packed)) afs_voltype_t; - -typedef enum { - AFS_FTYPE_INVALID = 0, - AFS_FTYPE_FILE = 1, - AFS_FTYPE_DIR = 2, - AFS_FTYPE_SYMLINK = 3, -} afs_file_type_t; - -#ifdef __KERNEL__ - -struct afs_cell; -struct afs_vnode; - -/*****************************************************************************/ -/* - * AFS file identifier - */ -struct afs_fid -{ - afs_volid_t vid; /* volume ID */ - afs_vnodeid_t vnode; /* file index within volume */ - unsigned unique; /* unique ID number (file index version) */ -}; - -/*****************************************************************************/ -/* - * AFS callback notification - */ -typedef enum { - AFSCM_CB_UNTYPED = 0, /* no type set on CB break */ - AFSCM_CB_EXCLUSIVE = 1, /* CB exclusive to CM [not implemented] */ - AFSCM_CB_SHARED = 2, /* CB shared by other CM's */ - AFSCM_CB_DROPPED = 3, /* CB promise cancelled by file server */ -} afs_callback_type_t; - -struct afs_callback -{ - struct afs_server *server; /* server that made the promise */ - struct afs_fid fid; /* file identifier */ - unsigned version; /* callback version */ - unsigned expiry; /* time at which expires */ - afs_callback_type_t type; /* type of callback */ -}; - -#define AFSCBMAX 50 - -/*****************************************************************************/ -/* - * AFS volume information - */ -struct afs_volume_info -{ - afs_volid_t vid; /* volume ID */ - afs_voltype_t type; /* type of this volume */ - afs_volid_t type_vids[5]; /* volume ID's for possible types for this vol */ - - /* list of fileservers serving this volume */ - size_t nservers; /* number of entries used in servers[] */ - struct { - struct in_addr addr; /* fileserver address */ - } servers[8]; -}; - -/*****************************************************************************/ -/* - * AFS file status information - */ -struct afs_file_status -{ - unsigned if_version; /* interface version */ -#define AFS_FSTATUS_VERSION 1 - - afs_file_type_t type; /* file type */ - unsigned nlink; /* link count */ - size_t size; /* file size */ - afs_dataversion_t version; /* current data version */ - unsigned author; /* author ID */ - unsigned owner; /* owner ID */ - unsigned caller_access; /* access rights for authenticated caller */ - unsigned anon_access; /* access rights for unauthenticated caller */ - umode_t mode; /* UNIX mode */ - struct afs_fid parent; /* parent file ID */ - time_t mtime_client; /* last time client changed data */ - time_t mtime_server; /* last time server changed data */ -}; - -/*****************************************************************************/ -/* - * AFS volume synchronisation information - */ -struct afs_volsync -{ - time_t creation; /* volume creation time */ -}; - -#endif /* __KERNEL__ */ - -#endif /* _LINUX_AFS_TYPES_H */ diff --git a/fs/afs/use-rtnetlink.c b/fs/afs/use-rtnetlink.c new file mode 100644 index 0000000..82f0daa --- /dev/null +++ b/fs/afs/use-rtnetlink.c @@ -0,0 +1,473 @@ +/* RTNETLINK client + * + * 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/netlink.h> +#include <linux/rtnetlink.h> +#include <linux/if_addr.h> +#include <linux/if_arp.h> +#include <linux/inetdevice.h> +#include <net/netlink.h> +#include "internal.h" + +struct afs_rtm_desc { + struct socket *nlsock; + struct afs_interface *bufs; + u8 *mac; + size_t nbufs; + size_t maxbufs; + void *data; + ssize_t datalen; + size_t datamax; + int msg_seq; + unsigned mac_index; + bool wantloopback; + int (*parse)(struct afs_rtm_desc *, struct nlmsghdr *); +}; + +/* + * parse an RTM_GETADDR response + */ +static int afs_rtm_getaddr_parse(struct afs_rtm_desc *desc, + struct nlmsghdr *nlhdr) +{ + struct afs_interface *this; + struct ifaddrmsg *ifa; + struct rtattr *rtattr; + const char *name; + size_t len; + + ifa = (struct ifaddrmsg *) NLMSG_DATA(nlhdr); + + _enter("{ix=%d,af=%d}", ifa->ifa_index, ifa->ifa_family); + + if (ifa->ifa_family != AF_INET) { + _leave(" = 0 [family %d]", ifa->ifa_family); + return 0; + } + if (desc->nbufs >= desc->maxbufs) { + _leave(" = 0 [max %zu/%zu]", desc->nbufs, desc->maxbufs); + return 0; + } + + this = &desc->bufs[desc->nbufs]; + + this->index = ifa->ifa_index; + this->netmask.s_addr = inet_make_mask(ifa->ifa_prefixlen); + this->mtu = 0; + + rtattr = NLMSG_DATA(nlhdr) + NLMSG_ALIGN(sizeof(struct ifaddrmsg)); + len = NLMSG_PAYLOAD(nlhdr, sizeof(struct ifaddrmsg)); + + name = "unknown"; + for (; RTA_OK(rtattr, len); rtattr = RTA_NEXT(rtattr, len)) { + switch (rtattr->rta_type) { + case IFA_ADDRESS: + memcpy(&this->address, RTA_DATA(rtattr), 4); + break; + case IFA_LABEL: + name = RTA_DATA(rtattr); + break; + } + } + + _debug("%s: "NIPQUAD_FMT"/"NIPQUAD_FMT, + name, NIPQUAD(this->address), NIPQUAD(this->netmask)); + + desc->nbufs++; + _leave(" = 0"); + return 0; +} + +/* + * parse an RTM_GETLINK response for MTUs + */ +static int afs_rtm_getlink_if_parse(struct afs_rtm_desc *desc, + struct nlmsghdr *nlhdr) +{ + struct afs_interface *this; + struct ifinfomsg *ifi; + struct rtattr *rtattr; + const char *name; + size_t len, loop; + + ifi = (struct ifinfomsg *) NLMSG_DATA(nlhdr); + + _enter("{ix=%d}", ifi->ifi_index); + + for (loop = 0; loop < desc->nbufs; loop++) { + this = &desc->bufs[loop]; + if (this->index == ifi->ifi_index) + goto found; + } + + _leave(" = 0 [no match]"); + return 0; + +found: + if (ifi->ifi_type == ARPHRD_LOOPBACK && !desc->wantloopback) { + _leave(" = 0 [loopback]"); + return 0; + } + + rtattr = NLMSG_DATA(nlhdr) + NLMSG_ALIGN(sizeof(struct ifinfomsg)); + len = NLMSG_PAYLOAD(nlhdr, sizeof(struct ifinfomsg)); + + name = "unknown"; + for (; RTA_OK(rtattr, len); rtattr = RTA_NEXT(rtattr, len)) { + switch (rtattr->rta_type) { + case IFLA_MTU: + memcpy(&this->mtu, RTA_DATA(rtattr), 4); + break; + case IFLA_IFNAME: + name = RTA_DATA(rtattr); + break; + } + } + + _debug("%s: "NIPQUAD_FMT"/"NIPQUAD_FMT" mtu %u", + name, NIPQUAD(this->address), NIPQUAD(this->netmask), + this->mtu); + + _leave(" = 0"); + return 0; +} + +/* + * parse an RTM_GETLINK response for the MAC address belonging to the lowest + * non-internal interface + */ +static int afs_rtm_getlink_mac_parse(struct afs_rtm_desc *desc, + struct nlmsghdr *nlhdr) +{ + struct ifinfomsg *ifi; + struct rtattr *rtattr; + const char *name; + size_t remain, len; + bool set; + + ifi = (struct ifinfomsg *) NLMSG_DATA(nlhdr); + + _enter("{ix=%d}", ifi->ifi_index); + + if (ifi->ifi_index >= desc->mac_index) { + _leave(" = 0 [high]"); + return 0; + } + if (ifi->ifi_type == ARPHRD_LOOPBACK) { + _leave(" = 0 [loopback]"); + return 0; + } + + rtattr = NLMSG_DATA(nlhdr) + NLMSG_ALIGN(sizeof(struct ifinfomsg)); + remain = NLMSG_PAYLOAD(nlhdr, sizeof(struct ifinfomsg)); + + name = "unknown"; + set = false; + for (; RTA_OK(rtattr, remain); rtattr = RTA_NEXT(rtattr, remain)) { + switch (rtattr->rta_type) { + case IFLA_ADDRESS: + len = RTA_PAYLOAD(rtattr); + memcpy(desc->mac, RTA_DATA(rtattr), + min_t(size_t, len, 6)); + desc->mac_index = ifi->ifi_index; + set = true; + break; + case IFLA_IFNAME: + name = RTA_DATA(rtattr); + break; + } + } + + if (set) + _debug("%s: %02x:%02x:%02x:%02x:%02x:%02x", + name, + desc->mac[0], desc->mac[1], desc->mac[2], + desc->mac[3], desc->mac[4], desc->mac[5]); + + _leave(" = 0"); + return 0; +} + +/* + * read the rtnetlink response and pass to parsing routine + */ +static int afs_read_rtm(struct afs_rtm_desc *desc) +{ + struct nlmsghdr *nlhdr, tmphdr; + struct msghdr msg; + struct kvec iov[1]; + void *data; + bool last = false; + int len, ret, remain; + + _enter(""); + + do { + /* first of all peek to see how big the packet is */ + memset(&msg, 0, sizeof(msg)); + iov[0].iov_base = &tmphdr; + iov[0].iov_len = sizeof(tmphdr); + len = kernel_recvmsg(desc->nlsock, &msg, iov, 1, + sizeof(tmphdr), MSG_PEEK | MSG_TRUNC); + if (len < 0) { + _leave(" = %d [peek]", len); + return len; + } + if (len == 0) + continue; + if (len < sizeof(tmphdr) || len < NLMSG_PAYLOAD(&tmphdr, 0)) { + _leave(" = -EMSGSIZE"); + return -EMSGSIZE; + } + + if (desc->datamax < len) { + kfree(desc->data); + desc->data = NULL; + data = kmalloc(len, GFP_KERNEL); + if (!data) + return -ENOMEM; + desc->data = data; + } + desc->datamax = len; + + /* read all the data from this packet */ + iov[0].iov_base = desc->data; + iov[0].iov_len = desc->datamax; + desc->datalen = kernel_recvmsg(desc->nlsock, &msg, iov, 1, + desc->datamax, 0); + if (desc->datalen < 0) { + _leave(" = %ld [recv]", desc->datalen); + return desc->datalen; + } + + nlhdr = desc->data; + + /* check if the header is valid */ + if (!NLMSG_OK(nlhdr, desc->datalen) || + nlhdr->nlmsg_type == NLMSG_ERROR) { + _leave(" = -EIO"); + return -EIO; + } + + /* see if this is the last message */ + if (nlhdr->nlmsg_type == NLMSG_DONE || + !(nlhdr->nlmsg_flags & NLM_F_MULTI)) + last = true; + + /* parse the bits we got this time */ + nlmsg_for_each_msg(nlhdr, desc->data, desc->datalen, remain) { + ret = desc->parse(desc, nlhdr); + if (ret < 0) { + _leave(" = %d [parse]", ret); + return ret; + } + } + + } while (!last); + + _leave(" = 0"); + return 0; +} + +/* + * list the interface bound addresses to get the address and netmask + */ +static int afs_rtm_getaddr(struct afs_rtm_desc *desc) +{ + struct msghdr msg; + struct kvec iov[1]; + int ret; + + struct { + struct nlmsghdr nl_msg __attribute__((aligned(NLMSG_ALIGNTO))); + struct ifaddrmsg addr_msg __attribute__((aligned(NLMSG_ALIGNTO))); + } request; + + _enter(""); + + memset(&request, 0, sizeof(request)); + + request.nl_msg.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)); + request.nl_msg.nlmsg_type = RTM_GETADDR; + request.nl_msg.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP; + request.nl_msg.nlmsg_seq = desc->msg_seq++; + request.nl_msg.nlmsg_pid = 0; + + memset(&msg, 0, sizeof(msg)); + iov[0].iov_base = &request; + iov[0].iov_len = sizeof(request); + + ret = kernel_sendmsg(desc->nlsock, &msg, iov, 1, iov[0].iov_len); + _leave(" = %d", ret); + return ret; +} + +/* + * list the interface link statuses to get the MTUs + */ +static int afs_rtm_getlink(struct afs_rtm_desc *desc) +{ + struct msghdr msg; + struct kvec iov[1]; + int ret; + + struct { + struct nlmsghdr nl_msg __attribute__((aligned(NLMSG_ALIGNTO))); + struct ifinfomsg link_msg __attribute__((aligned(NLMSG_ALIGNTO))); + } request; + + _enter(""); + + memset(&request, 0, sizeof(request)); + + request.nl_msg.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); + request.nl_msg.nlmsg_type = RTM_GETLINK; + request.nl_msg.nlmsg_flags = NLM_F_REQUEST | NLM_F_ROOT; + request.nl_msg.nlmsg_seq = desc->msg_seq++; + request.nl_msg.nlmsg_pid = 0; + + memset(&msg, 0, sizeof(msg)); + iov[0].iov_base = &request; + iov[0].iov_len = sizeof(request); + + ret = kernel_sendmsg(desc->nlsock, &msg, iov, 1, iov[0].iov_len); + _leave(" = %d", ret); + return ret; +} + +/* + * cull any interface records for which there isn't an MTU value + */ +static void afs_cull_interfaces(struct afs_rtm_desc *desc) +{ + struct afs_interface *bufs = desc->bufs; + size_t nbufs = desc->nbufs; + int loop, point = 0; + + _enter("{%zu}", nbufs); + + for (loop = 0; loop < nbufs; loop++) { + if (desc->bufs[loop].mtu != 0) { + if (loop != point) { + ASSERTCMP(loop, >, point); + bufs[point] = bufs[loop]; + } + point++; + } + } + + desc->nbufs = point; + _leave(" [%zu/%zu]", desc->nbufs, nbufs); +} + +/* + * get a list of this system's interface IPv4 addresses, netmasks and MTUs + * - returns the number of interface records in the buffer + */ +int afs_get_ipv4_interfaces(struct afs_interface *bufs, size_t maxbufs, + bool wantloopback) +{ + struct afs_rtm_desc desc; + int ret, loop; + + _enter(""); + + memset(&desc, 0, sizeof(desc)); + desc.bufs = bufs; + desc.maxbufs = maxbufs; + desc.wantloopback = wantloopback; + + ret = sock_create_kern(AF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE, + &desc.nlsock); + if (ret < 0) { + _leave(" = %d [sock]", ret); + return ret; + } + + /* issue RTM_GETADDR */ + desc.parse = afs_rtm_getaddr_parse; + ret = afs_rtm_getaddr(&desc); + if (ret < 0) + goto error; + ret = afs_read_rtm(&desc); + if (ret < 0) + goto error; + + /* issue RTM_GETLINK */ + desc.parse = afs_rtm_getlink_if_parse; + ret = afs_rtm_getlink(&desc); + if (ret < 0) + goto error; + ret = afs_read_rtm(&desc); + if (ret < 0) + goto error; + + afs_cull_interfaces(&desc); + ret = desc.nbufs; + + for (loop = 0; loop < ret; loop++) + _debug("[%d] "NIPQUAD_FMT"/"NIPQUAD_FMT" mtu %u", + bufs[loop].index, + NIPQUAD(bufs[loop].address), + NIPQUAD(bufs[loop].netmask), + bufs[loop].mtu); + +error: + kfree(desc.data); + sock_release(desc.nlsock); + _leave(" = %d", ret); + return ret; +} + +/* + * get a MAC address from a random ethernet interface that has a real one + * - the buffer should be 6 bytes in size + */ +int afs_get_MAC_address(u8 mac[6]) +{ + struct afs_rtm_desc desc; + int ret; + + _enter(""); + + memset(&desc, 0, sizeof(desc)); + desc.mac = mac; + desc.mac_index = UINT_MAX; + + ret = sock_create_kern(AF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE, + &desc.nlsock); + if (ret < 0) { + _leave(" = %d [sock]", ret); + return ret; + } + + /* issue RTM_GETLINK */ + desc.parse = afs_rtm_getlink_mac_parse; + ret = afs_rtm_getlink(&desc); + if (ret < 0) + goto error; + ret = afs_read_rtm(&desc); + if (ret < 0) + goto error; + + if (desc.mac_index < UINT_MAX) { + /* got a MAC address */ + _debug("[%d] %02x:%02x:%02x:%02x:%02x:%02x", + desc.mac_index, + mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); + } else { + ret = -ENONET; + } + +error: + sock_release(desc.nlsock); + _leave(" = %d", ret); + return ret; +} diff --git a/fs/afs/vlclient.c b/fs/afs/vlclient.c index 7b0e319..36c1306 100644 --- a/fs/afs/vlclient.c +++ b/fs/afs/vlclient.c @@ -1,4 +1,4 @@ -/* vlclient.c: AFS Volume Location Service client +/* AFS Volume Location Service client * * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) @@ -11,247 +11,76 @@ #include <linux/init.h> #include <linux/sched.h> -#include <rxrpc/rxrpc.h> -#include <rxrpc/transport.h> -#include <rxrpc/connection.h> -#include <rxrpc/call.h> -#include "server.h" -#include "volume.h" -#include "vlclient.h" -#include "kafsasyncd.h" -#include "kafstimod.h" -#include "errors.h" #include "internal.h" -#define VLGETENTRYBYID 503 /* AFS Get Cache Entry By ID operation ID */ -#define VLGETENTRYBYNAME 504 /* AFS Get Cache Entry By Name operation ID */ -#define VLPROBE 514 /* AFS Probe Volume Location Service operation ID */ - -static void afs_rxvl_get_entry_by_id_attn(struct rxrpc_call *call); -static void afs_rxvl_get_entry_by_id_error(struct rxrpc_call *call); - -/*****************************************************************************/ /* - * map afs VL abort codes to/from Linux error codes - * - called with call->lock held + * map volume locator abort codes to error codes */ -static void afs_rxvl_aemap(struct rxrpc_call *call) +static int afs_vl_abort_to_error(u32 abort_code) { - int err; - - _enter("{%u,%u,%d}", - call->app_err_state, call->app_abort_code, call->app_errno); - - switch (call->app_err_state) { - case RXRPC_ESTATE_LOCAL_ABORT: - call->app_abort_code = -call->app_errno; - return; - - case RXRPC_ESTATE_PEER_ABORT: - switch (call->app_abort_code) { - case AFSVL_IDEXIST: err = -EEXIST; break; - case AFSVL_IO: err = -EREMOTEIO; break; - case AFSVL_NAMEEXIST: err = -EEXIST; break; - case AFSVL_CREATEFAIL: err = -EREMOTEIO; break; - case AFSVL_NOENT: err = -ENOMEDIUM; break; - case AFSVL_EMPTY: err = -ENOMEDIUM; break; - case AFSVL_ENTDELETED: err = -ENOMEDIUM; break; - case AFSVL_BADNAME: err = -EINVAL; break; - case AFSVL_BADINDEX: err = -EINVAL; break; - case AFSVL_BADVOLTYPE: err = -EINVAL; break; - case AFSVL_BADSERVER: err = -EINVAL; break; - case AFSVL_BADPARTITION: err = -EINVAL; break; - case AFSVL_REPSFULL: err = -EFBIG; break; - case AFSVL_NOREPSERVER: err = -ENOENT; break; - case AFSVL_DUPREPSERVER: err = -EEXIST; break; - case AFSVL_RWNOTFOUND: err = -ENOENT; break; - case AFSVL_BADREFCOUNT: err = -EINVAL; break; - case AFSVL_SIZEEXCEEDED: err = -EINVAL; break; - case AFSVL_BADENTRY: err = -EINVAL; break; - case AFSVL_BADVOLIDBUMP: err = -EINVAL; break; - case AFSVL_IDALREADYHASHED: err = -EINVAL; break; - case AFSVL_ENTRYLOCKED: err = -EBUSY; break; - case AFSVL_BADVOLOPER: err = -EBADRQC; break; - case AFSVL_BADRELLOCKTYPE: err = -EINVAL; break; - case AFSVL_RERELEASE: err = -EREMOTEIO; break; - case AFSVL_BADSERVERFLAG: err = -EINVAL; break; - case AFSVL_PERM: err = -EACCES; break; - case AFSVL_NOMEM: err = -EREMOTEIO; break; - default: - err = afs_abort_to_error(call->app_abort_code); - break; - } - call->app_errno = err; - return; - + _enter("%u", abort_code); + + switch (abort_code) { + case AFSVL_IDEXIST: return -EEXIST; + case AFSVL_IO: return -EREMOTEIO; + case AFSVL_NAMEEXIST: return -EEXIST; + case AFSVL_CREATEFAIL: return -EREMOTEIO; + case AFSVL_NOENT: return -ENOMEDIUM; + case AFSVL_EMPTY: return -ENOMEDIUM; + case AFSVL_ENTDELETED: return -ENOMEDIUM; + case AFSVL_BADNAME: return -EINVAL; + case AFSVL_BADINDEX: return -EINVAL; + case AFSVL_BADVOLTYPE: return -EINVAL; + case AFSVL_BADSERVER: return -EINVAL; + case AFSVL_BADPARTITION: return -EINVAL; + case AFSVL_REPSFULL: return -EFBIG; + case AFSVL_NOREPSERVER: return -ENOENT; + case AFSVL_DUPREPSERVER: return -EEXIST; + case AFSVL_RWNOTFOUND: return -ENOENT; + case AFSVL_BADREFCOUNT: return -EINVAL; + case AFSVL_SIZEEXCEEDED: return -EINVAL; + case AFSVL_BADENTRY: return -EINVAL; + case AFSVL_BADVOLIDBUMP: return -EINVAL; + case AFSVL_IDALREADYHASHED: return -EINVAL; + case AFSVL_ENTRYLOCKED: return -EBUSY; + case AFSVL_BADVOLOPER: return -EBADRQC; + case AFSVL_BADRELLOCKTYPE: return -EINVAL; + case AFSVL_RERELEASE: return -EREMOTEIO; + case AFSVL_BADSERVERFLAG: return -EINVAL; + case AFSVL_PERM: return -EACCES; + case AFSVL_NOMEM: return -EREMOTEIO; default: - return; + return afs_abort_to_error(abort_code); } -} /* end afs_rxvl_aemap() */ +} -#if 0 -/*****************************************************************************/ /* - * probe a volume location server to see if it is still alive -- unused + * deliver reply data to a VL.GetEntryByXXX call */ -static int afs_rxvl_probe(struct afs_server *server, int alloc_flags) +static int afs_deliver_vl_get_entry_by_xxx(struct afs_call *call, + struct sk_buff *skb, bool last) { - struct rxrpc_connection *conn; - struct rxrpc_call *call; - struct kvec piov[1]; - size_t sent; - int ret; - __be32 param[1]; - - DECLARE_WAITQUEUE(myself, current); - - /* get hold of the vlserver connection */ - ret = afs_server_get_vlconn(server, &conn); - if (ret < 0) - goto out; - - /* create a call through that connection */ - ret = rxrpc_create_call(conn, NULL, NULL, afs_rxvl_aemap, &call); - if (ret < 0) { - printk("kAFS: Unable to create call: %d\n", ret); - goto out_put_conn; - } - call->app_opcode = VLPROBE; - - /* we want to get event notifications from the call */ - add_wait_queue(&call->waitq, &myself); - - /* marshall the parameters */ - param[0] = htonl(VLPROBE); - piov[0].iov_len = sizeof(param); - piov[0].iov_base = param; - - /* send the parameters to the server */ - ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, - alloc_flags, 0, &sent); - if (ret < 0) - goto abort; - - /* wait for the reply to completely arrive */ - for (;;) { - set_current_state(TASK_INTERRUPTIBLE); - if (call->app_call_state != RXRPC_CSTATE_CLNT_RCV_REPLY || - signal_pending(current)) - break; - schedule(); - } - set_current_state(TASK_RUNNING); - - ret = -EINTR; - if (signal_pending(current)) - goto abort; - - switch (call->app_call_state) { - case RXRPC_CSTATE_ERROR: - ret = call->app_errno; - goto out_unwait; - - case RXRPC_CSTATE_CLNT_GOT_REPLY: - ret = 0; - goto out_unwait; - - default: - BUG(); - } - - abort: - set_current_state(TASK_UNINTERRUPTIBLE); - rxrpc_call_abort(call, ret); - schedule(); - - out_unwait: - set_current_state(TASK_RUNNING); - remove_wait_queue(&call->waitq, &myself); - rxrpc_put_call(call); - out_put_conn: - rxrpc_put_connection(conn); - out: - return ret; + struct afs_cache_vlocation *entry; + __be32 *bp; + u32 tmp; + int loop; -} /* end afs_rxvl_probe() */ -#endif + _enter(",,%u", last); -/*****************************************************************************/ -/* - * look up a volume location database entry by name - */ -int afs_rxvl_get_entry_by_name(struct afs_server *server, - const char *volname, - unsigned volnamesz, - struct afs_cache_vlocation *entry) -{ - DECLARE_WAITQUEUE(myself, current); - - struct rxrpc_connection *conn; - struct rxrpc_call *call; - struct kvec piov[3]; - unsigned tmp; - size_t sent; - int ret, loop; - __be32 *bp, param[2], zero; - - _enter(",%*.*s,%u,", volnamesz, volnamesz, volname, volnamesz); - - memset(entry, 0, sizeof(*entry)); - - /* get hold of the vlserver connection */ - ret = afs_server_get_vlconn(server, &conn); - if (ret < 0) - goto out; - - /* create a call through that connection */ - ret = rxrpc_create_call(conn, NULL, NULL, afs_rxvl_aemap, &call); - if (ret < 0) { - printk("kAFS: Unable to create call: %d\n", ret); - goto out_put_conn; - } - call->app_opcode = VLGETENTRYBYNAME; + afs_transfer_reply(call, skb); + if (!last) + return 0; - /* we want to get event notifications from the call */ - add_wait_queue(&call->waitq, &myself); + if (call->reply_size != call->reply_max) + return -EBADMSG; - /* marshall the parameters */ - piov[1].iov_len = volnamesz; - piov[1].iov_base = (char *) volname; - - zero = 0; - piov[2].iov_len = (4 - (piov[1].iov_len & 3)) & 3; - piov[2].iov_base = &zero; - - param[0] = htonl(VLGETENTRYBYNAME); - param[1] = htonl(piov[1].iov_len); - - piov[0].iov_len = sizeof(param); - piov[0].iov_base = param; - - /* send the parameters to the server */ - ret = rxrpc_call_write_data(call, 3, piov, RXRPC_LAST_PACKET, GFP_NOFS, - 0, &sent); - if (ret < 0) - goto abort; - - /* wait for the reply to completely arrive */ - bp = rxrpc_call_alloc_scratch(call, 384); - - ret = rxrpc_call_read_data(call, bp, 384, - RXRPC_CALL_READ_BLOCK | - RXRPC_CALL_READ_ALL); - if (ret < 0) { - if (ret == -ECONNABORTED) { - ret = call->app_errno; - goto out_unwait; - } - goto abort; - } + /* unmarshall the reply once we've received all of it */ + entry = call->reply; + bp = call->buffer; - /* unmarshall the reply */ for (loop = 0; loop < 64; loop++) entry->name[loop] = ntohl(*bp++); + entry->name[loop] = 0; bp++; /* final NUL */ bp++; /* type */ @@ -264,6 +93,7 @@ int afs_rxvl_get_entry_by_name(struct afs_server *server, for (loop = 0; loop < 8; loop++) { tmp = ntohl(*bp++); + entry->srvtmask[loop] = 0; if (tmp & AFS_VLSF_RWVOL) entry->srvtmask[loop] |= AFS_VOL_VTM_RW; if (tmp & AFS_VLSF_ROVOL) @@ -279,417 +109,110 @@ int afs_rxvl_get_entry_by_name(struct afs_server *server, bp++; /* clone ID */ tmp = ntohl(*bp++); /* flags */ + entry->vidmask = 0; if (tmp & AFS_VLF_RWEXISTS) entry->vidmask |= AFS_VOL_VTM_RW; if (tmp & AFS_VLF_ROEXISTS) entry->vidmask |= AFS_VOL_VTM_RO; if (tmp & AFS_VLF_BACKEXISTS) entry->vidmask |= AFS_VOL_VTM_BAK; - - ret = -ENOMEDIUM; if (!entry->vidmask) - goto abort; - - /* success */ - entry->rtime = get_seconds(); - ret = 0; - - out_unwait: - set_current_state(TASK_RUNNING); - remove_wait_queue(&call->waitq, &myself); - rxrpc_put_call(call); - out_put_conn: - rxrpc_put_connection(conn); - out: - _leave(" = %d", ret); - return ret; - - abort: - set_current_state(TASK_UNINTERRUPTIBLE); - rxrpc_call_abort(call, ret); - schedule(); - goto out_unwait; -} /* end afs_rxvl_get_entry_by_name() */ - -/*****************************************************************************/ -/* - * look up a volume location database entry by ID - */ -int afs_rxvl_get_entry_by_id(struct afs_server *server, - afs_volid_t volid, - afs_voltype_t voltype, - struct afs_cache_vlocation *entry) -{ - DECLARE_WAITQUEUE(myself, current); - - struct rxrpc_connection *conn; - struct rxrpc_call *call; - struct kvec piov[1]; - unsigned tmp; - size_t sent; - int ret, loop; - __be32 *bp, param[3]; - - _enter(",%x,%d,", volid, voltype); - - memset(entry, 0, sizeof(*entry)); - - /* get hold of the vlserver connection */ - ret = afs_server_get_vlconn(server, &conn); - if (ret < 0) - goto out; - - /* create a call through that connection */ - ret = rxrpc_create_call(conn, NULL, NULL, afs_rxvl_aemap, &call); - if (ret < 0) { - printk("kAFS: Unable to create call: %d\n", ret); - goto out_put_conn; - } - call->app_opcode = VLGETENTRYBYID; - - /* we want to get event notifications from the call */ - add_wait_queue(&call->waitq, &myself); - - /* marshall the parameters */ - param[0] = htonl(VLGETENTRYBYID); - param[1] = htonl(volid); - param[2] = htonl(voltype); - - piov[0].iov_len = sizeof(param); - piov[0].iov_base = param; - - /* send the parameters to the server */ - ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS, - 0, &sent); - if (ret < 0) - goto abort; - - /* wait for the reply to completely arrive */ - bp = rxrpc_call_alloc_scratch(call, 384); - - ret = rxrpc_call_read_data(call, bp, 384, - RXRPC_CALL_READ_BLOCK | - RXRPC_CALL_READ_ALL); - if (ret < 0) { - if (ret == -ECONNABORTED) { - ret = call->app_errno; - goto out_unwait; - } - goto abort; - } - - /* unmarshall the reply */ - for (loop = 0; loop < 64; loop++) - entry->name[loop] = ntohl(*bp++); - bp++; /* final NUL */ + return -EBADMSG; - bp++; /* type */ - entry->nservers = ntohl(*bp++); - - for (loop = 0; loop < 8; loop++) - entry->servers[loop].s_addr = *bp++; - - bp += 8; /* partition IDs */ + _leave(" = 0 [done]"); + return 0; +} - for (loop = 0; loop < 8; loop++) { - tmp = ntohl(*bp++); - if (tmp & AFS_VLSF_RWVOL) - entry->srvtmask[loop] |= AFS_VOL_VTM_RW; - if (tmp & AFS_VLSF_ROVOL) - entry->srvtmask[loop] |= AFS_VOL_VTM_RO; - if (tmp & AFS_VLSF_BACKVOL) - entry->srvtmask[loop] |= AFS_VOL_VTM_BAK; - } - - entry->vid[0] = ntohl(*bp++); - entry->vid[1] = ntohl(*bp++); - entry->vid[2] = ntohl(*bp++); - - bp++; /* clone ID */ - - tmp = ntohl(*bp++); /* flags */ - if (tmp & AFS_VLF_RWEXISTS) - entry->vidmask |= AFS_VOL_VTM_RW; - if (tmp & AFS_VLF_ROEXISTS) - entry->vidmask |= AFS_VOL_VTM_RO; - if (tmp & AFS_VLF_BACKEXISTS) - entry->vidmask |= AFS_VOL_VTM_BAK; - - ret = -ENOMEDIUM; - if (!entry->vidmask) - goto abort; - -#if 0 /* TODO: remove */ - entry->nservers = 3; - entry->servers[0].s_addr = htonl(0xac101249); - entry->servers[1].s_addr = htonl(0xac101243); - entry->servers[2].s_addr = htonl(0xac10125b /*0xac10125b*/); - - entry->srvtmask[0] = AFS_VOL_VTM_RO; - entry->srvtmask[1] = AFS_VOL_VTM_RO; - entry->srvtmask[2] = AFS_VOL_VTM_RO | AFS_VOL_VTM_RW; -#endif - - /* success */ - entry->rtime = get_seconds(); - ret = 0; - - out_unwait: - set_current_state(TASK_RUNNING); - remove_wait_queue(&call->waitq, &myself); - rxrpc_put_call(call); - out_put_conn: - rxrpc_put_connection(conn); - out: - _leave(" = %d", ret); - return ret; - - abort: - set_current_state(TASK_UNINTERRUPTIBLE); - rxrpc_call_abort(call, ret); - schedule(); - goto out_unwait; -} /* end afs_rxvl_get_entry_by_id() */ - -/*****************************************************************************/ /* - * look up a volume location database entry by ID asynchronously + * VL.GetEntryByName operation type */ -int afs_rxvl_get_entry_by_id_async(struct afs_async_op *op, - afs_volid_t volid, - afs_voltype_t voltype) -{ - struct rxrpc_connection *conn; - struct rxrpc_call *call; - struct kvec piov[1]; - size_t sent; - int ret; - __be32 param[3]; - - _enter(",%x,%d,", volid, voltype); - - /* get hold of the vlserver connection */ - ret = afs_server_get_vlconn(op->server, &conn); - if (ret < 0) { - _leave(" = %d", ret); - return ret; - } - - /* create a call through that connection */ - ret = rxrpc_create_call(conn, - afs_rxvl_get_entry_by_id_attn, - afs_rxvl_get_entry_by_id_error, - afs_rxvl_aemap, - &op->call); - rxrpc_put_connection(conn); - - if (ret < 0) { - printk("kAFS: Unable to create call: %d\n", ret); - _leave(" = %d", ret); - return ret; - } +static const struct afs_call_type afs_RXVLGetEntryByName = { + .name = "VL.GetEntryByName", + .deliver = afs_deliver_vl_get_entry_by_xxx, + .abort_to_error = afs_vl_abort_to_error, + .destructor = afs_flat_call_destructor, +}; - op->call->app_opcode = VLGETENTRYBYID; - op->call->app_user = op; - - call = op->call; - rxrpc_get_call(call); - - /* send event notifications from the call to kafsasyncd */ - afs_kafsasyncd_begin_op(op); - - /* marshall the parameters */ - param[0] = htonl(VLGETENTRYBYID); - param[1] = htonl(volid); - param[2] = htonl(voltype); - - piov[0].iov_len = sizeof(param); - piov[0].iov_base = param; - - /* allocate result read buffer in scratch space */ - call->app_scr_ptr = rxrpc_call_alloc_scratch(op->call, 384); - - /* send the parameters to the server */ - ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS, - 0, &sent); - if (ret < 0) { - rxrpc_call_abort(call, ret); /* handle from kafsasyncd */ - ret = 0; - goto out; - } - - /* wait for the reply to completely arrive */ - ret = rxrpc_call_read_data(call, call->app_scr_ptr, 384, 0); - switch (ret) { - case 0: - case -EAGAIN: - case -ECONNABORTED: - ret = 0; - break; /* all handled by kafsasyncd */ - - default: - rxrpc_call_abort(call, ret); /* make kafsasyncd handle it */ - ret = 0; - break; - } - - out: - rxrpc_put_call(call); - _leave(" = %d", ret); - return ret; - -} /* end afs_rxvl_get_entry_by_id_async() */ +/* + * VL.GetEntryById operation type + */ +static const struct afs_call_type afs_RXVLGetEntryById = { + .name = "VL.GetEntryById", + .deliver = afs_deliver_vl_get_entry_by_xxx, + .abort_to_error = afs_vl_abort_to_error, + .destructor = afs_flat_call_destructor, +}; -/*****************************************************************************/ /* - * attend to the asynchronous get VLDB entry by ID + * dispatch a get volume entry by name operation */ -int afs_rxvl_get_entry_by_id_async2(struct afs_async_op *op, - struct afs_cache_vlocation *entry) +int afs_vl_get_entry_by_name(struct in_addr *addr, + struct key *key, + const char *volname, + struct afs_cache_vlocation *entry, + const struct afs_wait_mode *wait_mode) { + struct afs_call *call; + size_t volnamesz, reqsz, padsz; __be32 *bp; - __u32 tmp; - int loop, ret; - - _enter("{op=%p cst=%u}", op, op->call->app_call_state); - - memset(entry, 0, sizeof(*entry)); - - if (op->call->app_call_state == RXRPC_CSTATE_COMPLETE) { - /* operation finished */ - afs_kafsasyncd_terminate_op(op); - - bp = op->call->app_scr_ptr; - - /* unmarshall the reply */ - for (loop = 0; loop < 64; loop++) - entry->name[loop] = ntohl(*bp++); - bp++; /* final NUL */ - - bp++; /* type */ - entry->nservers = ntohl(*bp++); - - for (loop = 0; loop < 8; loop++) - entry->servers[loop].s_addr = *bp++; - - bp += 8; /* partition IDs */ - - for (loop = 0; loop < 8; loop++) { - tmp = ntohl(*bp++); - if (tmp & AFS_VLSF_RWVOL) - entry->srvtmask[loop] |= AFS_VOL_VTM_RW; - if (tmp & AFS_VLSF_ROVOL) - entry->srvtmask[loop] |= AFS_VOL_VTM_RO; - if (tmp & AFS_VLSF_BACKVOL) - entry->srvtmask[loop] |= AFS_VOL_VTM_BAK; - } - - entry->vid[0] = ntohl(*bp++); - entry->vid[1] = ntohl(*bp++); - entry->vid[2] = ntohl(*bp++); - - bp++; /* clone ID */ - - tmp = ntohl(*bp++); /* flags */ - if (tmp & AFS_VLF_RWEXISTS) - entry->vidmask |= AFS_VOL_VTM_RW; - if (tmp & AFS_VLF_ROEXISTS) - entry->vidmask |= AFS_VOL_VTM_RO; - if (tmp & AFS_VLF_BACKEXISTS) - entry->vidmask |= AFS_VOL_VTM_BAK; - - ret = -ENOMEDIUM; - if (!entry->vidmask) { - rxrpc_call_abort(op->call, ret); - goto done; - } - -#if 0 /* TODO: remove */ - entry->nservers = 3; - entry->servers[0].s_addr = htonl(0xac101249); - entry->servers[1].s_addr = htonl(0xac101243); - entry->servers[2].s_addr = htonl(0xac10125b /*0xac10125b*/); - - entry->srvtmask[0] = AFS_VOL_VTM_RO; - entry->srvtmask[1] = AFS_VOL_VTM_RO; - entry->srvtmask[2] = AFS_VOL_VTM_RO | AFS_VOL_VTM_RW; -#endif - - /* success */ - entry->rtime = get_seconds(); - ret = 0; - goto done; - } - if (op->call->app_call_state == RXRPC_CSTATE_ERROR) { - /* operation error */ - ret = op->call->app_errno; - goto done; - } + _enter(""); - _leave(" = -EAGAIN"); - return -EAGAIN; + volnamesz = strlen(volname); + padsz = (4 - (volnamesz & 3)) & 3; + reqsz = 8 + volnamesz + padsz; - done: - rxrpc_put_call(op->call); - op->call = NULL; - _leave(" = %d", ret); - return ret; -} /* end afs_rxvl_get_entry_by_id_async2() */ + call = afs_alloc_flat_call(&afs_RXVLGetEntryByName, reqsz, 384); + if (!call) + return -ENOMEM; -/*****************************************************************************/ -/* - * handle attention events on an async get-entry-by-ID op - * - called from krxiod - */ -static void afs_rxvl_get_entry_by_id_attn(struct rxrpc_call *call) -{ - struct afs_async_op *op = call->app_user; - - _enter("{op=%p cst=%u}", op, call->app_call_state); - - switch (call->app_call_state) { - case RXRPC_CSTATE_COMPLETE: - afs_kafsasyncd_attend_op(op); - break; - case RXRPC_CSTATE_CLNT_RCV_REPLY: - if (call->app_async_read) - break; - case RXRPC_CSTATE_CLNT_GOT_REPLY: - if (call->app_read_count == 0) - break; - printk("kAFS: Reply bigger than expected" - " {cst=%u asyn=%d mark=%Zu rdy=%Zu pr=%u%s}", - call->app_call_state, - call->app_async_read, - call->app_mark, - call->app_ready_qty, - call->pkt_rcv_count, - call->app_last_rcv ? " last" : ""); - - rxrpc_call_abort(call, -EBADMSG); - break; - default: - BUG(); - } + call->key = key; + call->reply = entry; + call->service_id = VL_SERVICE; + call->port = htons(AFS_VL_PORT); - _leave(""); + /* marshall the parameters */ + bp = call->request; + *bp++ = htonl(VLGETENTRYBYNAME); + *bp++ = htonl(volnamesz); + memcpy(bp, volname, volnamesz); + if (padsz > 0) + memset((void *) bp + volnamesz, 0, padsz); -} /* end afs_rxvl_get_entry_by_id_attn() */ + /* initiate the call */ + return afs_make_call(addr, call, GFP_KERNEL, wait_mode); +} -/*****************************************************************************/ /* - * handle error events on an async get-entry-by-ID op - * - called from krxiod + * dispatch a get volume entry by ID operation */ -static void afs_rxvl_get_entry_by_id_error(struct rxrpc_call *call) +int afs_vl_get_entry_by_id(struct in_addr *addr, + struct key *key, + afs_volid_t volid, + afs_voltype_t voltype, + struct afs_cache_vlocation *entry, + const struct afs_wait_mode *wait_mode) { - struct afs_async_op *op = call->app_user; + struct afs_call *call; + __be32 *bp; - _enter("{op=%p cst=%u}", op, call->app_call_state); + _enter(""); - afs_kafsasyncd_attend_op(op); + call = afs_alloc_flat_call(&afs_RXVLGetEntryById, 12, 384); + if (!call) + return -ENOMEM; - _leave(""); + call->key = key; + call->reply = entry; + call->service_id = VL_SERVICE; + call->port = htons(AFS_VL_PORT); -} /* end afs_rxvl_get_entry_by_id_error() */ + /* marshall the parameters */ + bp = call->request; + *bp++ = htonl(VLGETENTRYBYID); + *bp++ = htonl(volid); + *bp = htonl(voltype); + + /* initiate the call */ + return afs_make_call(addr, call, GFP_KERNEL, wait_mode); +} diff --git a/fs/afs/vlocation.c b/fs/afs/vlocation.c index 782ee7c..74cce17 100644 --- a/fs/afs/vlocation.c +++ b/fs/afs/vlocation.c @@ -1,6 +1,6 @@ -/* vlocation.c: volume location management +/* AFS volume location management * - * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. + * Copyright (C) 2002, 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 @@ -12,131 +12,61 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> -#include <linux/slab.h> -#include <linux/fs.h> -#include <linux/pagemap.h> -#include "volume.h" -#include "cell.h" -#include "cmservice.h" -#include "fsclient.h" -#include "vlclient.h" -#include "kafstimod.h" -#include <rxrpc/connection.h> #include "internal.h" -#define AFS_VLDB_TIMEOUT HZ*1000 +unsigned afs_vlocation_timeout = 10; /* volume location timeout in seconds */ +unsigned afs_vlocation_update_timeout = 10 * 60; -static void afs_vlocation_update_timer(struct afs_timer *timer); -static void afs_vlocation_update_attend(struct afs_async_op *op); -static void afs_vlocation_update_discard(struct afs_async_op *op); -static void __afs_put_vlocation(struct afs_vlocation *vlocation); +static void afs_vlocation_reaper(struct work_struct *); +static void afs_vlocation_updater(struct work_struct *); -static void __afs_vlocation_timeout(struct afs_timer *timer) -{ - struct afs_vlocation *vlocation = - list_entry(timer, struct afs_vlocation, timeout); - - _debug("VL TIMEOUT [%s{u=%d}]", - vlocation->vldb.name, atomic_read(&vlocation->usage)); - - afs_vlocation_do_timeout(vlocation); -} - -static const struct afs_timer_ops afs_vlocation_timer_ops = { - .timed_out = __afs_vlocation_timeout, -}; +static LIST_HEAD(afs_vlocation_updates); +static LIST_HEAD(afs_vlocation_graveyard); +static DEFINE_SPINLOCK(afs_vlocation_updates_lock); +static DEFINE_SPINLOCK(afs_vlocation_graveyard_lock); +static DECLARE_DELAYED_WORK(afs_vlocation_reap, afs_vlocation_reaper); +static DECLARE_DELAYED_WORK(afs_vlocation_update, afs_vlocation_updater); +static struct workqueue_struct *afs_vlocation_update_worker; -static const struct afs_timer_ops afs_vlocation_update_timer_ops = { - .timed_out = afs_vlocation_update_timer, -}; - -static const struct afs_async_op_ops afs_vlocation_update_op_ops = { - .attend = afs_vlocation_update_attend, - .discard = afs_vlocation_update_discard, -}; - -static LIST_HEAD(afs_vlocation_update_pendq); /* queue of VLs awaiting update */ -static struct afs_vlocation *afs_vlocation_update; /* VL currently being updated */ -static DEFINE_SPINLOCK(afs_vlocation_update_lock); /* lock guarding update queue */ - -#ifdef AFS_CACHING_SUPPORT -static cachefs_match_val_t afs_vlocation_cache_match(void *target, - const void *entry); -static void afs_vlocation_cache_update(void *source, void *entry); - -struct cachefs_index_def afs_vlocation_cache_index_def = { - .name = "vldb", - .data_size = sizeof(struct afs_cache_vlocation), - .keys[0] = { CACHEFS_INDEX_KEYS_ASCIIZ, 64 }, - .match = afs_vlocation_cache_match, - .update = afs_vlocation_cache_update, -}; -#endif - -/*****************************************************************************/ /* * iterate through the VL servers in a cell until one of them admits knowing * about the volume in question - * - caller must have cell->vl_sem write-locked */ -static int afs_vlocation_access_vl_by_name(struct afs_vlocation *vlocation, - const char *name, - unsigned namesz, +static int afs_vlocation_access_vl_by_name(struct afs_vlocation *vl, + struct key *key, struct afs_cache_vlocation *vldb) { - struct afs_server *server = NULL; - struct afs_cell *cell = vlocation->cell; + struct afs_cell *cell = vl->cell; + struct in_addr addr; int count, ret; - _enter("%s,%*.*s,%u", cell->name, namesz, namesz, name, namesz); + _enter("%s,%s", cell->name, vl->vldb.name); + down_write(&vl->cell->vl_sem); ret = -ENOMEDIUM; for (count = cell->vl_naddrs; count > 0; count--) { - _debug("CellServ[%hu]: %08x", - cell->vl_curr_svix, - cell->vl_addrs[cell->vl_curr_svix].s_addr); - - /* try and create a server */ - ret = afs_server_lookup(cell, - &cell->vl_addrs[cell->vl_curr_svix], - &server); - switch (ret) { - case 0: - break; - case -ENOMEM: - case -ENONET: - goto out; - default: - goto rotate; - } + addr = cell->vl_addrs[cell->vl_curr_svix]; + + _debug("CellServ[%hu]: %08x", cell->vl_curr_svix, addr.s_addr); /* attempt to access the VL server */ - ret = afs_rxvl_get_entry_by_name(server, name, namesz, vldb); + ret = afs_vl_get_entry_by_name(&addr, key, vl->vldb.name, vldb, + &afs_sync_call); switch (ret) { case 0: - afs_put_server(server); goto out; case -ENOMEM: case -ENONET: case -ENETUNREACH: case -EHOSTUNREACH: case -ECONNREFUSED: - down_write(&server->sem); - if (server->vlserver) { - rxrpc_put_connection(server->vlserver); - server->vlserver = NULL; - } - up_write(&server->sem); - afs_put_server(server); if (ret == -ENOMEM || ret == -ENONET) goto out; goto rotate; case -ENOMEDIUM: - afs_put_server(server); goto out; default: - afs_put_server(server); - ret = -ENOMEDIUM; + ret = -EIO; goto rotate; } @@ -146,76 +76,66 @@ static int afs_vlocation_access_vl_by_name(struct afs_vlocation *vlocation, cell->vl_curr_svix %= cell->vl_naddrs; } - out: +out: + up_write(&vl->cell->vl_sem); _leave(" = %d", ret); return ret; +} -} /* end afs_vlocation_access_vl_by_name() */ - -/*****************************************************************************/ /* * iterate through the VL servers in a cell until one of them admits knowing * about the volume in question - * - caller must have cell->vl_sem write-locked */ -static int afs_vlocation_access_vl_by_id(struct afs_vlocation *vlocation, +static int afs_vlocation_access_vl_by_id(struct afs_vlocation *vl, + struct key *key, afs_volid_t volid, afs_voltype_t voltype, struct afs_cache_vlocation *vldb) { - struct afs_server *server = NULL; - struct afs_cell *cell = vlocation->cell; + struct afs_cell *cell = vl->cell; + struct in_addr addr; int count, ret; _enter("%s,%x,%d,", cell->name, volid, voltype); + down_write(&vl->cell->vl_sem); ret = -ENOMEDIUM; for (count = cell->vl_naddrs; count > 0; count--) { - _debug("CellServ[%hu]: %08x", - cell->vl_curr_svix, - cell->vl_addrs[cell->vl_curr_svix].s_addr); - - /* try and create a server */ - ret = afs_server_lookup(cell, - &cell->vl_addrs[cell->vl_curr_svix], - &server); - switch (ret) { - case 0: - break; - case -ENOMEM: - case -ENONET: - goto out; - default: - goto rotate; - } + addr = cell->vl_addrs[cell->vl_curr_svix]; + + _debug("CellServ[%hu]: %08x", cell->vl_curr_svix, addr.s_addr); /* attempt to access the VL server */ - ret = afs_rxvl_get_entry_by_id(server, volid, voltype, vldb); + ret = afs_vl_get_entry_by_id(&addr, key, volid, voltype, vldb, + &afs_sync_call); switch (ret) { case 0: - afs_put_server(server); goto out; case -ENOMEM: case -ENONET: case -ENETUNREACH: case -EHOSTUNREACH: case -ECONNREFUSED: - down_write(&server->sem); - if (server->vlserver) { - rxrpc_put_connection(server->vlserver); - server->vlserver = NULL; - } - up_write(&server->sem); - afs_put_server(server); if (ret == -ENOMEM || ret == -ENONET) goto out; goto rotate; + case -EBUSY: + vl->upd_busy_cnt++; + if (vl->upd_busy_cnt <= 3) { + if (vl->upd_busy_cnt > 1) { + /* second+ BUSY - sleep a little bit */ + set_current_state(TASK_UNINTERRUPTIBLE); + schedule_timeout(1); + __set_current_state(TASK_RUNNING); + } + continue; + } + break; case -ENOMEDIUM: - afs_put_server(server); - goto out; + vl->upd_rej_cnt++; + goto rotate; default: - afs_put_server(server); - ret = -ENOMEDIUM; + ret = -EIO; goto rotate; } @@ -223,729 +143,580 @@ static int afs_vlocation_access_vl_by_id(struct afs_vlocation *vlocation, rotate: cell->vl_curr_svix++; cell->vl_curr_svix %= cell->vl_naddrs; + vl->upd_busy_cnt = 0; } - out: +out: + if (ret < 0 && vl->upd_rej_cnt > 0) { + printk(KERN_NOTICE "kAFS:" + " Active volume no longer valid '%s'\n", + vl->vldb.name); + vl->valid = 0; + ret = -ENOMEDIUM; + } + + up_write(&vl->cell->vl_sem); _leave(" = %d", ret); return ret; +} -} /* end afs_vlocation_access_vl_by_id() */ - -/*****************************************************************************/ /* - * lookup volume location - * - caller must have cell->vol_sem write-locked - * - iterate through the VL servers in a cell until one of them admits knowing - * about the volume in question - * - lookup in the local cache if not able to find on the VL server - * - insert/update in the local cache if did get a VL response + * allocate a volume location record */ -int afs_vlocation_lookup(struct afs_cell *cell, - const char *name, - unsigned namesz, - struct afs_vlocation **_vlocation) +static struct afs_vlocation *afs_vlocation_alloc(struct afs_cell *cell, + const char *name, + size_t namesz) { - struct afs_cache_vlocation vldb; - struct afs_vlocation *vlocation; - afs_voltype_t voltype; - afs_volid_t vid; - int active = 0, ret; - - _enter("{%s},%*.*s,%u,", cell->name, namesz, namesz, name, namesz); - - if (namesz > sizeof(vlocation->vldb.name)) { - _leave(" = -ENAMETOOLONG"); - return -ENAMETOOLONG; - } - - /* search the cell's active list first */ - list_for_each_entry(vlocation, &cell->vl_list, link) { - if (namesz < sizeof(vlocation->vldb.name) && - vlocation->vldb.name[namesz] != '\0') - continue; - - if (memcmp(vlocation->vldb.name, name, namesz) == 0) - goto found_in_memory; - } - - /* search the cell's graveyard list second */ - spin_lock(&cell->vl_gylock); - list_for_each_entry(vlocation, &cell->vl_graveyard, link) { - if (namesz < sizeof(vlocation->vldb.name) && - vlocation->vldb.name[namesz] != '\0') - continue; - - if (memcmp(vlocation->vldb.name, name, namesz) == 0) - goto found_in_graveyard; - } - spin_unlock(&cell->vl_gylock); - - /* not in the cell's in-memory lists - create a new record */ - vlocation = kzalloc(sizeof(struct afs_vlocation), GFP_KERNEL); - if (!vlocation) - return -ENOMEM; - - atomic_set(&vlocation->usage, 1); - INIT_LIST_HEAD(&vlocation->link); - rwlock_init(&vlocation->lock); - memcpy(vlocation->vldb.name, name, namesz); - - afs_timer_init(&vlocation->timeout, &afs_vlocation_timer_ops); - afs_timer_init(&vlocation->upd_timer, &afs_vlocation_update_timer_ops); - afs_async_op_init(&vlocation->upd_op, &afs_vlocation_update_op_ops); - - afs_get_cell(cell); - vlocation->cell = cell; - - list_add_tail(&vlocation->link, &cell->vl_list); - -#ifdef AFS_CACHING_SUPPORT - /* we want to store it in the cache, plus it might already be - * encached */ - cachefs_acquire_cookie(cell->cache, - &afs_volume_cache_index_def, - vlocation, - &vlocation->cache); - - if (vlocation->valid) - goto found_in_cache; -#endif - - /* try to look up an unknown volume in the cell VL databases by name */ - ret = afs_vlocation_access_vl_by_name(vlocation, name, namesz, &vldb); - if (ret < 0) { - printk("kAFS: failed to locate '%*.*s' in cell '%s'\n", - namesz, namesz, name, cell->name); - goto error; + struct afs_vlocation *vl; + + vl = kzalloc(sizeof(struct afs_vlocation), GFP_KERNEL); + if (vl) { + vl->cell = cell; + vl->state = AFS_VL_NEW; + atomic_set(&vl->usage, 1); + INIT_LIST_HEAD(&vl->link); + INIT_LIST_HEAD(&vl->grave); + INIT_LIST_HEAD(&vl->update); + init_waitqueue_head(&vl->waitq); + spin_lock_init(&vl->lock); + memcpy(vl->vldb.name, name, namesz); } - goto found_on_vlserver; - - found_in_graveyard: - /* found in the graveyard - resurrect */ - _debug("found in graveyard"); - atomic_inc(&vlocation->usage); - list_move_tail(&vlocation->link, &cell->vl_list); - spin_unlock(&cell->vl_gylock); - - afs_kafstimod_del_timer(&vlocation->timeout); - goto active; - - found_in_memory: - /* found in memory - check to see if it's active */ - _debug("found in memory"); - atomic_inc(&vlocation->usage); + _leave(" = %p", vl); + return vl; +} - active: - active = 1; +/* + * update record if we found it in the cache + */ +static int afs_vlocation_update_record(struct afs_vlocation *vl, + struct key *key, + struct afs_cache_vlocation *vldb) +{ + afs_voltype_t voltype; + afs_volid_t vid; + int ret; -#ifdef AFS_CACHING_SUPPORT - found_in_cache: -#endif /* try to look up a cached volume in the cell VL databases by ID */ - _debug("found in cache"); - _debug("Locally Cached: %s %02x { %08x(%x) %08x(%x) %08x(%x) }", - vlocation->vldb.name, - vlocation->vldb.vidmask, - ntohl(vlocation->vldb.servers[0].s_addr), - vlocation->vldb.srvtmask[0], - ntohl(vlocation->vldb.servers[1].s_addr), - vlocation->vldb.srvtmask[1], - ntohl(vlocation->vldb.servers[2].s_addr), - vlocation->vldb.srvtmask[2] - ); + vl->vldb.name, + vl->vldb.vidmask, + ntohl(vl->vldb.servers[0].s_addr), + vl->vldb.srvtmask[0], + ntohl(vl->vldb.servers[1].s_addr), + vl->vldb.srvtmask[1], + ntohl(vl->vldb.servers[2].s_addr), + vl->vldb.srvtmask[2]); _debug("Vids: %08x %08x %08x", - vlocation->vldb.vid[0], - vlocation->vldb.vid[1], - vlocation->vldb.vid[2]); + vl->vldb.vid[0], + vl->vldb.vid[1], + vl->vldb.vid[2]); - if (vlocation->vldb.vidmask & AFS_VOL_VTM_RW) { - vid = vlocation->vldb.vid[0]; + if (vl->vldb.vidmask & AFS_VOL_VTM_RW) { + vid = vl->vldb.vid[0]; voltype = AFSVL_RWVOL; - } - else if (vlocation->vldb.vidmask & AFS_VOL_VTM_RO) { - vid = vlocation->vldb.vid[1]; + } else if (vl->vldb.vidmask & AFS_VOL_VTM_RO) { + vid = vl->vldb.vid[1]; voltype = AFSVL_ROVOL; - } - else if (vlocation->vldb.vidmask & AFS_VOL_VTM_BAK) { - vid = vlocation->vldb.vid[2]; + } else if (vl->vldb.vidmask & AFS_VOL_VTM_BAK) { + vid = vl->vldb.vid[2]; voltype = AFSVL_BACKVOL; - } - else { + } else { BUG(); vid = 0; voltype = 0; } - ret = afs_vlocation_access_vl_by_id(vlocation, vid, voltype, &vldb); + /* contact the server to make sure the volume is still available + * - TODO: need to handle disconnected operation here + */ + ret = afs_vlocation_access_vl_by_id(vl, key, vid, voltype, vldb); switch (ret) { /* net error */ default: - printk("kAFS: failed to volume '%*.*s' (%x) up in '%s': %d\n", - namesz, namesz, name, vid, cell->name, ret); - goto error; + printk(KERN_WARNING "kAFS:" + " failed to update volume '%s' (%x) up in '%s': %d\n", + vl->vldb.name, vid, vl->cell->name, ret); + _leave(" = %d", ret); + return ret; /* pulled from local cache into memory */ case 0: - goto found_on_vlserver; + _leave(" = 0"); + return 0; /* uh oh... looks like the volume got deleted */ case -ENOMEDIUM: - printk("kAFS: volume '%*.*s' (%x) does not exist '%s'\n", - namesz, namesz, name, vid, cell->name); + printk(KERN_ERR "kAFS:" + " volume '%s' (%x) does not exist '%s'\n", + vl->vldb.name, vid, vl->cell->name); /* TODO: make existing record unavailable */ - goto error; + _leave(" = %d", ret); + return ret; } +} - found_on_vlserver: - _debug("Done VL Lookup: %*.*s %02x { %08x(%x) %08x(%x) %08x(%x) }", - namesz, namesz, name, - vldb.vidmask, - ntohl(vldb.servers[0].s_addr), vldb.srvtmask[0], - ntohl(vldb.servers[1].s_addr), vldb.srvtmask[1], - ntohl(vldb.servers[2].s_addr), vldb.srvtmask[2] - ); - - _debug("Vids: %08x %08x %08x", vldb.vid[0], vldb.vid[1], vldb.vid[2]); +/* + * apply the update to a VL record + */ +static void afs_vlocation_apply_update(struct afs_vlocation *vl, + struct afs_cache_vlocation *vldb) +{ + _debug("Done VL Lookup: %s %02x { %08x(%x) %08x(%x) %08x(%x) }", + vldb->name, vldb->vidmask, + ntohl(vldb->servers[0].s_addr), vldb->srvtmask[0], + ntohl(vldb->servers[1].s_addr), vldb->srvtmask[1], + ntohl(vldb->servers[2].s_addr), vldb->srvtmask[2]); - if ((namesz < sizeof(vlocation->vldb.name) && - vlocation->vldb.name[namesz] != '\0') || - memcmp(vldb.name, name, namesz) != 0) - printk("kAFS: name of volume '%*.*s' changed to '%s' on server\n", - namesz, namesz, name, vldb.name); + _debug("Vids: %08x %08x %08x", + vldb->vid[0], vldb->vid[1], vldb->vid[2]); - memcpy(&vlocation->vldb, &vldb, sizeof(vlocation->vldb)); + if (strcmp(vldb->name, vl->vldb.name) != 0) + printk(KERN_NOTICE "kAFS:" + " name of volume '%s' changed to '%s' on server\n", + vl->vldb.name, vldb->name); - afs_kafstimod_add_timer(&vlocation->upd_timer, 10 * HZ); + vl->vldb = *vldb; #ifdef AFS_CACHING_SUPPORT /* update volume entry in local cache */ - cachefs_update_cookie(vlocation->cache); -#endif - - *_vlocation = vlocation; - _leave(" = 0 (%p)",vlocation); - return 0; - - error: - if (vlocation) { - if (active) { - __afs_put_vlocation(vlocation); - } - else { - list_del(&vlocation->link); -#ifdef AFS_CACHING_SUPPORT - cachefs_relinquish_cookie(vlocation->cache, 0); + cachefs_update_cookie(vl->cache); #endif - afs_put_cell(vlocation->cell); - kfree(vlocation); - } - } - - _leave(" = %d", ret); - return ret; -} /* end afs_vlocation_lookup() */ +} -/*****************************************************************************/ /* - * finish using a volume location record - * - caller must have cell->vol_sem write-locked + * fill in a volume location record, consulting the cache and the VL server + * both */ -static void __afs_put_vlocation(struct afs_vlocation *vlocation) +static int afs_vlocation_fill_in_record(struct afs_vlocation *vl, + struct key *key) { - struct afs_cell *cell; + struct afs_cache_vlocation vldb; + int ret; - if (!vlocation) - return; + _enter(""); - _enter("%s", vlocation->vldb.name); + ASSERTCMP(vl->valid, ==, 0); - cell = vlocation->cell; + memset(&vldb, 0, sizeof(vldb)); - /* sanity check */ - BUG_ON(atomic_read(&vlocation->usage) <= 0); + /* see if we have an in-cache copy (will set vl->valid if there is) */ +#ifdef AFS_CACHING_SUPPORT + cachefs_acquire_cookie(cell->cache, + &afs_volume_cache_index_def, + vlocation, + &vl->cache); +#endif - spin_lock(&cell->vl_gylock); - if (likely(!atomic_dec_and_test(&vlocation->usage))) { - spin_unlock(&cell->vl_gylock); - _leave(""); - return; + if (vl->valid) { + /* try to update a known volume in the cell VL databases by + * ID as the name may have changed */ + _debug("found in cache"); + ret = afs_vlocation_update_record(vl, key, &vldb); + } else { + /* try to look up an unknown volume in the cell VL databases by + * name */ + ret = afs_vlocation_access_vl_by_name(vl, key, &vldb); + if (ret < 0) { + printk("kAFS: failed to locate '%s' in cell '%s'\n", + vl->vldb.name, vl->cell->name); + return ret; + } } - /* move to graveyard queue */ - list_move_tail(&vlocation->link,&cell->vl_graveyard); - - /* remove from pending timeout queue (refcounted if actually being - * updated) */ - list_del_init(&vlocation->upd_op.link); - - /* time out in 10 secs */ - afs_kafstimod_del_timer(&vlocation->upd_timer); - afs_kafstimod_add_timer(&vlocation->timeout, 10 * HZ); - - spin_unlock(&cell->vl_gylock); - - _leave(" [killed]"); -} /* end __afs_put_vlocation() */ - -/*****************************************************************************/ -/* - * finish using a volume location record - */ -void afs_put_vlocation(struct afs_vlocation *vlocation) -{ - if (vlocation) { - struct afs_cell *cell = vlocation->cell; - - down_write(&cell->vl_sem); - __afs_put_vlocation(vlocation); - up_write(&cell->vl_sem); - } -} /* end afs_put_vlocation() */ + afs_vlocation_apply_update(vl, &vldb); + _leave(" = 0"); + return 0; +} -/*****************************************************************************/ /* - * timeout vlocation record - * - removes from the cell's graveyard if the usage count is zero + * queue a vlocation record for updates */ -void afs_vlocation_do_timeout(struct afs_vlocation *vlocation) +void afs_vlocation_queue_for_updates(struct afs_vlocation *vl) { - struct afs_cell *cell; + struct afs_vlocation *xvl; - _enter("%s", vlocation->vldb.name); + /* wait at least 10 minutes before updating... */ + vl->update_at = get_seconds() + afs_vlocation_update_timeout; - cell = vlocation->cell; + spin_lock(&afs_vlocation_updates_lock); - BUG_ON(atomic_read(&vlocation->usage) < 0); - - /* remove from graveyard if still dead */ - spin_lock(&cell->vl_gylock); - if (atomic_read(&vlocation->usage) == 0) - list_del_init(&vlocation->link); - else - vlocation = NULL; - spin_unlock(&cell->vl_gylock); - - if (!vlocation) { - _leave(""); - return; /* resurrected */ + if (!list_empty(&afs_vlocation_updates)) { + /* ... but wait at least 1 second more than the newest record + * already queued so that we don't spam the VL server suddenly + * with lots of requests + */ + xvl = list_entry(afs_vlocation_updates.prev, + struct afs_vlocation, update); + if (vl->update_at <= xvl->update_at) + vl->update_at = xvl->update_at + 1; + } else { + queue_delayed_work(afs_vlocation_update_worker, + &afs_vlocation_update, + afs_vlocation_update_timeout * HZ); } - /* we can now destroy it properly */ -#ifdef AFS_CACHING_SUPPORT - cachefs_relinquish_cookie(vlocation->cache, 0); -#endif - afs_put_cell(cell); - - kfree(vlocation); - - _leave(" [destroyed]"); -} /* end afs_vlocation_do_timeout() */ + list_add_tail(&vl->update, &afs_vlocation_updates); + spin_unlock(&afs_vlocation_updates_lock); +} -/*****************************************************************************/ /* - * send an update operation to the currently selected server + * lookup volume location + * - iterate through the VL servers in a cell until one of them admits knowing + * about the volume in question + * - lookup in the local cache if not able to find on the VL server + * - insert/update in the local cache if did get a VL response */ -static int afs_vlocation_update_begin(struct afs_vlocation *vlocation) +struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *cell, + struct key *key, + const char *name, + size_t namesz) { - afs_voltype_t voltype; - afs_volid_t vid; + struct afs_vlocation *vl; int ret; - _enter("%s{ufs=%u ucs=%u}", - vlocation->vldb.name, - vlocation->upd_first_svix, - vlocation->upd_curr_svix); + _enter("{%s},{%x},%*.*s,%zu", + cell->name, key_serial(key), + (int) namesz, (int) namesz, name, namesz); - /* try to look up a cached volume in the cell VL databases by ID */ - if (vlocation->vldb.vidmask & AFS_VOL_VTM_RW) { - vid = vlocation->vldb.vid[0]; - voltype = AFSVL_RWVOL; - } - else if (vlocation->vldb.vidmask & AFS_VOL_VTM_RO) { - vid = vlocation->vldb.vid[1]; - voltype = AFSVL_ROVOL; + if (namesz > sizeof(vl->vldb.name)) { + _leave(" = -ENAMETOOLONG"); + return ERR_PTR(-ENAMETOOLONG); } - else if (vlocation->vldb.vidmask & AFS_VOL_VTM_BAK) { - vid = vlocation->vldb.vid[2]; - voltype = AFSVL_BACKVOL; + + /* see if we have an in-memory copy first */ + down_write(&cell->vl_sem); + spin_lock(&cell->vl_lock); + list_for_each_entry(vl, &cell->vl_list, link) { + if (vl->vldb.name[namesz] != '\0') + continue; + if (memcmp(vl->vldb.name, name, namesz) == 0) + goto found_in_memory; } - else { - BUG(); - vid = 0; - voltype = 0; + spin_unlock(&cell->vl_lock); + + /* not in the cell's in-memory lists - create a new record */ + vl = afs_vlocation_alloc(cell, name, namesz); + if (!vl) { + up_write(&cell->vl_sem); + return ERR_PTR(-ENOMEM); } - /* contact the chosen server */ - ret = afs_server_lookup( - vlocation->cell, - &vlocation->cell->vl_addrs[vlocation->upd_curr_svix], - &vlocation->upd_op.server); + afs_get_cell(cell); - switch (ret) { - case 0: - break; - case -ENOMEM: - case -ENONET: - default: - _leave(" = %d", ret); - return ret; - } + list_add_tail(&vl->link, &cell->vl_list); + vl->state = AFS_VL_CREATING; + up_write(&cell->vl_sem); - /* initiate the update operation */ - ret = afs_rxvl_get_entry_by_id_async(&vlocation->upd_op, vid, voltype); - if (ret < 0) { - _leave(" = %d", ret); - return ret; +fill_in_record: + ret = afs_vlocation_fill_in_record(vl, key); + if (ret < 0) + goto error_abandon; + spin_lock(&vl->lock); + vl->state = AFS_VL_VALID; + wake_up(&vl->waitq); + spin_unlock(&vl->lock); + + /* schedule for regular updates */ + afs_vlocation_queue_for_updates(vl); + goto success; + +found_in_memory: + /* found in memory */ + _debug("found in memory"); + atomic_inc(&vl->usage); + spin_unlock(&cell->vl_lock); + if (!list_empty(&vl->grave)) { + spin_lock(&afs_vlocation_graveyard_lock); + list_del_init(&vl->grave); + spin_unlock(&afs_vlocation_graveyard_lock); } + up_write(&cell->vl_sem); + + /* see if it was an abandoned record that we might try filling in */ + spin_lock(&vl->lock); + while (vl->state != AFS_VL_VALID) { + afs_vlocation_state_t state = vl->state; + + _debug("invalid [state %d]", state); + + if ((state == AFS_VL_NEW || state == AFS_VL_NO_VOLUME)) { + vl->state = AFS_VL_CREATING; + spin_unlock(&vl->lock); + goto fill_in_record; + } + + /* must now wait for creation or update by someone else to + * complete */ + _debug("wait"); + spin_unlock(&vl->lock); + ret = wait_event_interruptible( + vl->waitq, + vl->state == AFS_VL_NEW || + vl->state == AFS_VL_VALID || + vl->state == AFS_VL_NO_VOLUME); + if (ret < 0) + goto error; + spin_lock(&vl->lock); + } + spin_unlock(&vl->lock); + +success: + _leave(" = %p",vl); + return vl; + +error_abandon: + spin_lock(&vl->lock); + vl->state = AFS_VL_NEW; + wake_up(&vl->waitq); + spin_unlock(&vl->lock); +error: + ASSERT(vl != NULL); + afs_put_vlocation(vl); _leave(" = %d", ret); - return ret; -} /* end afs_vlocation_update_begin() */ + return ERR_PTR(ret); +} -/*****************************************************************************/ /* - * abandon updating a VL record - * - does not restart the update timer + * finish using a volume location record */ -static void afs_vlocation_update_abandon(struct afs_vlocation *vlocation, - afs_vlocation_upd_t state, - int ret) +void afs_put_vlocation(struct afs_vlocation *vl) { - _enter("%s,%u", vlocation->vldb.name, state); - - if (ret < 0) - printk("kAFS: Abandoning VL update '%s': %d\n", - vlocation->vldb.name, ret); - - /* discard the server record */ - afs_put_server(vlocation->upd_op.server); - vlocation->upd_op.server = NULL; + if (!vl) + return; - spin_lock(&afs_vlocation_update_lock); - afs_vlocation_update = NULL; - vlocation->upd_state = state; + _enter("%s", vl->vldb.name); - /* TODO: start updating next VL record on pending list */ + ASSERTCMP(atomic_read(&vl->usage), >, 0); - spin_unlock(&afs_vlocation_update_lock); + if (likely(!atomic_dec_and_test(&vl->usage))) { + _leave(""); + return; + } - _leave(""); -} /* end afs_vlocation_update_abandon() */ + spin_lock(&afs_vlocation_graveyard_lock); + if (atomic_read(&vl->usage) == 0) { + _debug("buried"); + list_move_tail(&vl->grave, &afs_vlocation_graveyard); + vl->time_of_death = get_seconds(); + schedule_delayed_work(&afs_vlocation_reap, + afs_vlocation_timeout * HZ); + + /* suspend updates on this record */ + if (!list_empty(&vl->update)) { + spin_lock(&afs_vlocation_updates_lock); + list_del_init(&vl->update); + spin_unlock(&afs_vlocation_updates_lock); + } + } + spin_unlock(&afs_vlocation_graveyard_lock); + _leave(" [killed?]"); +} -/*****************************************************************************/ /* - * handle periodic update timeouts and busy retry timeouts - * - called from kafstimod + * destroy a dead volume location record */ -static void afs_vlocation_update_timer(struct afs_timer *timer) +static void afs_vlocation_destroy(struct afs_vlocation *vl) { - struct afs_vlocation *vlocation = - list_entry(timer, struct afs_vlocation, upd_timer); - int ret; + _enter("%p", vl); - _enter("%s", vlocation->vldb.name); +#ifdef AFS_CACHING_SUPPORT + cachefs_relinquish_cookie(vl->cache, 0); +#endif - /* only update if not in the graveyard (defend against putting too) */ - spin_lock(&vlocation->cell->vl_gylock); + afs_put_cell(vl->cell); + kfree(vl); +} - if (!atomic_read(&vlocation->usage)) - goto out_unlock1; +/* + * reap dead volume location records + */ +static void afs_vlocation_reaper(struct work_struct *work) +{ + LIST_HEAD(corpses); + struct afs_vlocation *vl; + unsigned long delay, expiry; + time_t now; - spin_lock(&afs_vlocation_update_lock); + _enter(""); - /* if we were woken up due to EBUSY sleep then restart immediately if - * possible or else jump to front of pending queue */ - if (vlocation->upd_state == AFS_VLUPD_BUSYSLEEP) { - if (afs_vlocation_update) { - list_add(&vlocation->upd_op.link, - &afs_vlocation_update_pendq); + now = get_seconds(); + spin_lock(&afs_vlocation_graveyard_lock); + + while (!list_empty(&afs_vlocation_graveyard)) { + vl = list_entry(afs_vlocation_graveyard.next, + struct afs_vlocation, grave); + + _debug("check %p", vl); + + /* the queue is ordered most dead first */ + expiry = vl->time_of_death + afs_vlocation_timeout; + if (expiry > now) { + delay = (expiry - now) * HZ; + _debug("delay %lu", delay); + if (!schedule_delayed_work(&afs_vlocation_reap, + delay)) { + cancel_delayed_work(&afs_vlocation_reap); + schedule_delayed_work(&afs_vlocation_reap, + delay); + } + break; } - else { - afs_get_vlocation(vlocation); - afs_vlocation_update = vlocation; - vlocation->upd_state = AFS_VLUPD_INPROGRESS; + + spin_lock(&vl->cell->vl_lock); + if (atomic_read(&vl->usage) > 0) { + _debug("no reap"); + list_del_init(&vl->grave); + } else { + _debug("reap"); + list_move_tail(&vl->grave, &corpses); + list_del_init(&vl->link); } - goto out_unlock2; + spin_unlock(&vl->cell->vl_lock); } - /* put on pending queue if there's already another update in progress */ - if (afs_vlocation_update) { - vlocation->upd_state = AFS_VLUPD_PENDING; - list_add_tail(&vlocation->upd_op.link, - &afs_vlocation_update_pendq); - goto out_unlock2; - } + spin_unlock(&afs_vlocation_graveyard_lock); - /* hold a ref on it while actually updating */ - afs_get_vlocation(vlocation); - afs_vlocation_update = vlocation; - vlocation->upd_state = AFS_VLUPD_INPROGRESS; - - spin_unlock(&afs_vlocation_update_lock); - spin_unlock(&vlocation->cell->vl_gylock); - - /* okay... we can start the update */ - _debug("BEGIN VL UPDATE [%s]", vlocation->vldb.name); - vlocation->upd_first_svix = vlocation->cell->vl_curr_svix; - vlocation->upd_curr_svix = vlocation->upd_first_svix; - vlocation->upd_rej_cnt = 0; - vlocation->upd_busy_cnt = 0; - - ret = afs_vlocation_update_begin(vlocation); - if (ret < 0) { - afs_vlocation_update_abandon(vlocation, AFS_VLUPD_SLEEP, ret); - afs_kafstimod_add_timer(&vlocation->upd_timer, - AFS_VLDB_TIMEOUT); - afs_put_vlocation(vlocation); + /* now reap the corpses we've extracted */ + while (!list_empty(&corpses)) { + vl = list_entry(corpses.next, struct afs_vlocation, grave); + list_del(&vl->grave); + afs_vlocation_destroy(vl); } _leave(""); - return; +} - out_unlock2: - spin_unlock(&afs_vlocation_update_lock); - out_unlock1: - spin_unlock(&vlocation->cell->vl_gylock); - _leave(""); - return; +/* + * initialise the VL update process + */ +int __init afs_vlocation_update_init(void) +{ + afs_vlocation_update_worker = + create_singlethread_workqueue("kafs_vlupdated"); + return afs_vlocation_update_worker ? 0 : -ENOMEM; +} -} /* end afs_vlocation_update_timer() */ +/* + * discard all the volume location records for rmmod + */ +void __exit afs_vlocation_purge(void) +{ + afs_vlocation_timeout = 0; + + spin_lock(&afs_vlocation_updates_lock); + list_del_init(&afs_vlocation_updates); + spin_unlock(&afs_vlocation_updates_lock); + cancel_delayed_work(&afs_vlocation_update); + queue_delayed_work(afs_vlocation_update_worker, + &afs_vlocation_update, 0); + destroy_workqueue(afs_vlocation_update_worker); + + cancel_delayed_work(&afs_vlocation_reap); + schedule_delayed_work(&afs_vlocation_reap, 0); +} -/*****************************************************************************/ /* - * attend to an update operation upon which an event happened - * - called in kafsasyncd context + * update a volume location */ -static void afs_vlocation_update_attend(struct afs_async_op *op) +static void afs_vlocation_updater(struct work_struct *work) { struct afs_cache_vlocation vldb; - struct afs_vlocation *vlocation = - list_entry(op, struct afs_vlocation, upd_op); - unsigned tmp; + struct afs_vlocation *vl, *xvl; + time_t now; + long timeout; int ret; - _enter("%s", vlocation->vldb.name); - - ret = afs_rxvl_get_entry_by_id_async2(op, &vldb); - switch (ret) { - case -EAGAIN: - _leave(" [unfinished]"); - return; - - case 0: - _debug("END VL UPDATE: %d\n", ret); - vlocation->valid = 1; - - _debug("Done VL Lookup: %02x { %08x(%x) %08x(%x) %08x(%x) }", - vldb.vidmask, - ntohl(vldb.servers[0].s_addr), vldb.srvtmask[0], - ntohl(vldb.servers[1].s_addr), vldb.srvtmask[1], - ntohl(vldb.servers[2].s_addr), vldb.srvtmask[2] - ); - - _debug("Vids: %08x %08x %08x", - vldb.vid[0], vldb.vid[1], vldb.vid[2]); - - afs_vlocation_update_abandon(vlocation, AFS_VLUPD_SLEEP, 0); - - down_write(&vlocation->cell->vl_sem); - - /* actually update the cache */ - if (strncmp(vldb.name, vlocation->vldb.name, - sizeof(vlocation->vldb.name)) != 0) - printk("kAFS: name of volume '%s'" - " changed to '%s' on server\n", - vlocation->vldb.name, vldb.name); - - memcpy(&vlocation->vldb, &vldb, sizeof(vlocation->vldb)); - -#if 0 - /* TODO update volume entry in local cache */ -#endif - - up_write(&vlocation->cell->vl_sem); - - if (ret < 0) - printk("kAFS: failed to update local cache: %d\n", ret); - - afs_kafstimod_add_timer(&vlocation->upd_timer, - AFS_VLDB_TIMEOUT); - afs_put_vlocation(vlocation); - _leave(" [found]"); - return; - - case -ENOMEDIUM: - vlocation->upd_rej_cnt++; - goto try_next; - - /* the server is locked - retry in a very short while */ - case -EBUSY: - vlocation->upd_busy_cnt++; - if (vlocation->upd_busy_cnt > 3) - goto try_next; /* too many retries */ - - afs_vlocation_update_abandon(vlocation, - AFS_VLUPD_BUSYSLEEP, 0); - afs_kafstimod_add_timer(&vlocation->upd_timer, HZ / 2); - afs_put_vlocation(vlocation); - _leave(" [busy]"); - return; - - case -ENETUNREACH: - case -EHOSTUNREACH: - case -ECONNREFUSED: - case -EREMOTEIO: - /* record bad vlserver info in the cell too - * - TODO: use down_write_trylock() if available - */ - if (vlocation->upd_curr_svix == vlocation->cell->vl_curr_svix) - vlocation->cell->vl_curr_svix = - vlocation->cell->vl_curr_svix % - vlocation->cell->vl_naddrs; - - case -EBADRQC: - case -EINVAL: - case -EACCES: - case -EBADMSG: - goto try_next; - - default: - goto abandon; - } - - /* try contacting the next server */ - try_next: - vlocation->upd_busy_cnt = 0; - - /* discard the server record */ - afs_put_server(vlocation->upd_op.server); - vlocation->upd_op.server = NULL; + _enter(""); - tmp = vlocation->cell->vl_naddrs; - if (tmp == 0) - goto abandon; + now = get_seconds(); - vlocation->upd_curr_svix++; - if (vlocation->upd_curr_svix >= tmp) - vlocation->upd_curr_svix = 0; - if (vlocation->upd_first_svix >= tmp) - vlocation->upd_first_svix = tmp - 1; + /* find a record to update */ + spin_lock(&afs_vlocation_updates_lock); + for (;;) { + if (list_empty(&afs_vlocation_updates)) { + spin_unlock(&afs_vlocation_updates_lock); + _leave(" [nothing]"); + return; + } - /* move to the next server */ - if (vlocation->upd_curr_svix != vlocation->upd_first_svix) { - afs_vlocation_update_begin(vlocation); - _leave(" [next]"); - return; + vl = list_entry(afs_vlocation_updates.next, + struct afs_vlocation, update); + if (atomic_read(&vl->usage) > 0) + break; + list_del_init(&vl->update); } - /* run out of servers to try - was the volume rejected? */ - if (vlocation->upd_rej_cnt > 0) { - printk("kAFS: Active volume no longer valid '%s'\n", - vlocation->vldb.name); - vlocation->valid = 0; - afs_vlocation_update_abandon(vlocation, AFS_VLUPD_SLEEP, 0); - afs_kafstimod_add_timer(&vlocation->upd_timer, - AFS_VLDB_TIMEOUT); - afs_put_vlocation(vlocation); - _leave(" [invalidated]"); + timeout = vl->update_at - now; + if (timeout > 0) { + queue_delayed_work(afs_vlocation_update_worker, + &afs_vlocation_update, timeout * HZ); + spin_unlock(&afs_vlocation_updates_lock); + _leave(" [nothing]"); return; } - /* abandon the update */ - abandon: - afs_vlocation_update_abandon(vlocation, AFS_VLUPD_SLEEP, ret); - afs_kafstimod_add_timer(&vlocation->upd_timer, HZ * 10); - afs_put_vlocation(vlocation); - _leave(" [abandoned]"); - -} /* end afs_vlocation_update_attend() */ - -/*****************************************************************************/ -/* - * deal with an update operation being discarded - * - called in kafsasyncd context when it's dying due to rmmod - * - the call has already been aborted and put()'d - */ -static void afs_vlocation_update_discard(struct afs_async_op *op) -{ - struct afs_vlocation *vlocation = - list_entry(op, struct afs_vlocation, upd_op); + list_del_init(&vl->update); + atomic_inc(&vl->usage); + spin_unlock(&afs_vlocation_updates_lock); - _enter("%s", vlocation->vldb.name); + /* we can now perform the update */ + _debug("update %s", vl->vldb.name); + vl->state = AFS_VL_UPDATING; + vl->upd_rej_cnt = 0; + vl->upd_busy_cnt = 0; - afs_put_server(op->server); - op->server = NULL; + ret = afs_vlocation_update_record(vl, NULL, &vldb); + spin_lock(&vl->lock); + switch (ret) { + case 0: + afs_vlocation_apply_update(vl, &vldb); + vl->state = AFS_VL_VALID; + wake_up(&vl->waitq); + break; + case -ENOMEDIUM: + vl->state = AFS_VL_VOLUME_DELETED; + break; + default: + vl->state = AFS_VL_UNCERTAIN; + break; + } + spin_unlock(&vl->lock); - afs_put_vlocation(vlocation); + /* and then reschedule */ + _debug("reschedule"); + vl->update_at = get_seconds() + afs_vlocation_update_timeout; - _leave(""); -} /* end afs_vlocation_update_discard() */ + spin_lock(&afs_vlocation_updates_lock); -/*****************************************************************************/ -/* - * match a VLDB record stored in the cache - * - may also load target from entry - */ -#ifdef AFS_CACHING_SUPPORT -static cachefs_match_val_t afs_vlocation_cache_match(void *target, - const void *entry) -{ - const struct afs_cache_vlocation *vldb = entry; - struct afs_vlocation *vlocation = target; - - _enter("{%s},{%s}", vlocation->vldb.name, vldb->name); - - if (strncmp(vlocation->vldb.name, vldb->name, sizeof(vldb->name)) == 0 - ) { - if (!vlocation->valid || - vlocation->vldb.rtime == vldb->rtime - ) { - vlocation->vldb = *vldb; - vlocation->valid = 1; - _leave(" = SUCCESS [c->m]"); - return CACHEFS_MATCH_SUCCESS; - } - /* need to update cache if cached info differs */ - else if (memcmp(&vlocation->vldb, vldb, sizeof(*vldb)) != 0) { - /* delete if VIDs for this name differ */ - if (memcmp(&vlocation->vldb.vid, - &vldb->vid, - sizeof(vldb->vid)) != 0) { - _leave(" = DELETE"); - return CACHEFS_MATCH_SUCCESS_DELETE; - } - - _leave(" = UPDATE"); - return CACHEFS_MATCH_SUCCESS_UPDATE; - } - else { - _leave(" = SUCCESS"); - return CACHEFS_MATCH_SUCCESS; - } + if (!list_empty(&afs_vlocation_updates)) { + /* next update in 10 minutes, but wait at least 1 second more + * than the newest record already queued so that we don't spam + * the VL server suddenly with lots of requests + */ + xvl = list_entry(afs_vlocation_updates.prev, + struct afs_vlocation, update); + if (vl->update_at <= xvl->update_at) + vl->update_at = xvl->update_at + 1; + xvl = list_entry(afs_vlocation_updates.next, + struct afs_vlocation, update); + timeout = xvl->update_at - now; + if (timeout < 0) + timeout = 0; + } else { + timeout = afs_vlocation_update_timeout; } - _leave(" = FAILED"); - return CACHEFS_MATCH_FAILED; -} /* end afs_vlocation_cache_match() */ -#endif - -/*****************************************************************************/ -/* - * update a VLDB record stored in the cache - */ -#ifdef AFS_CACHING_SUPPORT -static void afs_vlocation_cache_update(void *source, void *entry) -{ - struct afs_cache_vlocation *vldb = entry; - struct afs_vlocation *vlocation = source; + ASSERT(list_empty(&vl->update)); - _enter(""); - - *vldb = vlocation->vldb; + list_add_tail(&vl->update, &afs_vlocation_updates); -} /* end afs_vlocation_cache_update() */ -#endif + _debug("timeout %ld", timeout); + queue_delayed_work(afs_vlocation_update_worker, + &afs_vlocation_update, timeout * HZ); + spin_unlock(&afs_vlocation_updates_lock); + afs_put_vlocation(vl); +} diff --git a/fs/afs/vnode.c b/fs/afs/vnode.c index cf62da5..a1904ab 100644 --- a/fs/afs/vnode.c +++ b/fs/afs/vnode.c @@ -1,6 +1,6 @@ -/* vnode.c: AFS vnode management +/* AFS vnode management * - * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. + * Copyright (C) 2002, 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 @@ -14,142 +14,237 @@ #include <linux/init.h> #include <linux/slab.h> #include <linux/fs.h> -#include <linux/pagemap.h> -#include "volume.h" -#include "cell.h" -#include "cmservice.h" -#include "fsclient.h" -#include "vlclient.h" -#include "vnode.h" #include "internal.h" -static void afs_vnode_cb_timed_out(struct afs_timer *timer); +#if 0 +static noinline bool dump_tree_aux(struct rb_node *node, struct rb_node *parent, + int depth, char lr) +{ + struct afs_vnode *vnode; + bool bad = false; + + if (!node) + return false; + + if (node->rb_left) + bad = dump_tree_aux(node->rb_left, node, depth + 2, '/'); + + vnode = rb_entry(node, struct afs_vnode, cb_promise); + _debug("%c %*.*s%c%p {%d}", + rb_is_red(node) ? 'R' : 'B', + depth, depth, "", lr, + vnode, vnode->cb_expires_at); + if (rb_parent(node) != parent) { + printk("BAD: %p != %p\n", rb_parent(node), parent); + bad = true; + } -struct afs_timer_ops afs_vnode_cb_timed_out_ops = { - .timed_out = afs_vnode_cb_timed_out, -}; + if (node->rb_right) + bad |= dump_tree_aux(node->rb_right, node, depth + 2, '\\'); -#ifdef AFS_CACHING_SUPPORT -static cachefs_match_val_t afs_vnode_cache_match(void *target, - const void *entry); -static void afs_vnode_cache_update(void *source, void *entry); + return bad; +} -struct cachefs_index_def afs_vnode_cache_index_def = { - .name = "vnode", - .data_size = sizeof(struct afs_cache_vnode), - .keys[0] = { CACHEFS_INDEX_KEYS_BIN, 4 }, - .match = afs_vnode_cache_match, - .update = afs_vnode_cache_update, -}; +static noinline void dump_tree(const char *name, struct afs_server *server) +{ + _enter("%s", name); + if (dump_tree_aux(server->cb_promises.rb_node, NULL, 0, '-')) + BUG(); +} #endif -/*****************************************************************************/ /* - * handle a callback timing out - * TODO: retain a ref to vnode struct for an outstanding callback timeout + * insert a vnode into the backing server's vnode tree */ -static void afs_vnode_cb_timed_out(struct afs_timer *timer) +static void afs_install_vnode(struct afs_vnode *vnode, + struct afs_server *server) { - struct afs_server *oldserver; - struct afs_vnode *vnode; + struct afs_server *old_server = vnode->server; + struct afs_vnode *xvnode; + struct rb_node *parent, **p; - vnode = list_entry(timer, struct afs_vnode, cb_timeout); + _enter("%p,%p", vnode, server); - _enter("%p", vnode); + if (old_server) { + spin_lock(&old_server->fs_lock); + rb_erase(&vnode->server_rb, &old_server->fs_vnodes); + spin_unlock(&old_server->fs_lock); + } - /* set the changed flag in the vnode and release the server */ - spin_lock(&vnode->lock); + afs_get_server(server); + vnode->server = server; + afs_put_server(old_server); + + /* insert into the server's vnode tree in FID order */ + spin_lock(&server->fs_lock); + + parent = NULL; + p = &server->fs_vnodes.rb_node; + while (*p) { + parent = *p; + xvnode = rb_entry(parent, struct afs_vnode, server_rb); + if (vnode->fid.vid < xvnode->fid.vid) + p = &(*p)->rb_left; + else if (vnode->fid.vid > xvnode->fid.vid) + p = &(*p)->rb_right; + else if (vnode->fid.vnode < xvnode->fid.vnode) + p = &(*p)->rb_left; + else if (vnode->fid.vnode > xvnode->fid.vnode) + p = &(*p)->rb_right; + else if (vnode->fid.unique < xvnode->fid.unique) + p = &(*p)->rb_left; + else if (vnode->fid.unique > xvnode->fid.unique) + p = &(*p)->rb_right; + else + BUG(); /* can't happen unless afs_iget() malfunctions */ + } + + rb_link_node(&vnode->server_rb, parent, p); + rb_insert_color(&vnode->server_rb, &server->fs_vnodes); - oldserver = xchg(&vnode->cb_server, NULL); - if (oldserver) { - vnode->flags |= AFS_VNODE_CHANGED; + spin_unlock(&server->fs_lock); + _leave(""); +} - spin_lock(&afs_cb_hash_lock); - list_del_init(&vnode->cb_hash_link); - spin_unlock(&afs_cb_hash_lock); +/* + * insert a vnode into the promising server's update/expiration tree + * - caller must hold vnode->lock + */ +static void afs_vnode_note_promise(struct afs_vnode *vnode, + struct afs_server *server) +{ + struct afs_server *old_server; + struct afs_vnode *xvnode; + struct rb_node *parent, **p; - spin_lock(&oldserver->cb_lock); - list_del_init(&vnode->cb_link); - spin_unlock(&oldserver->cb_lock); + _enter("%p,%p", vnode, server); + + ASSERT(server != NULL); + + old_server = vnode->server; + if (vnode->cb_promised) { + if (server == old_server && + vnode->cb_expires == vnode->cb_expires_at) { + _leave(" [no change]"); + return; + } + + spin_lock(&old_server->cb_lock); + if (vnode->cb_promised) { + _debug("delete"); + rb_erase(&vnode->cb_promise, &old_server->cb_promises); + vnode->cb_promised = false; + } + spin_unlock(&old_server->cb_lock); } - spin_unlock(&vnode->lock); + if (vnode->server != server) + afs_install_vnode(vnode, server); + + vnode->cb_expires_at = vnode->cb_expires; + _debug("PROMISE on %p {%lu}", + vnode, (unsigned long) vnode->cb_expires_at); + + /* abuse an RB-tree to hold the expiration order (we may have multiple + * items with the same expiration time) */ + spin_lock(&server->cb_lock); + + parent = NULL; + p = &server->cb_promises.rb_node; + while (*p) { + parent = *p; + xvnode = rb_entry(parent, struct afs_vnode, cb_promise); + if (vnode->cb_expires_at < xvnode->cb_expires_at) + p = &(*p)->rb_left; + else + p = &(*p)->rb_right; + } - afs_put_server(oldserver); + rb_link_node(&vnode->cb_promise, parent, p); + rb_insert_color(&vnode->cb_promise, &server->cb_promises); + vnode->cb_promised = true; + spin_unlock(&server->cb_lock); _leave(""); -} /* end afs_vnode_cb_timed_out() */ +} -/*****************************************************************************/ /* - * finish off updating the recorded status of a file + * handle remote file deletion by discarding the callback promise + */ +static void afs_vnode_deleted_remotely(struct afs_vnode *vnode) +{ + struct afs_server *server; + + set_bit(AFS_VNODE_DELETED, &vnode->flags); + + server = vnode->server; + if (vnode->cb_promised) { + spin_lock(&server->cb_lock); + if (vnode->cb_promised) { + rb_erase(&vnode->cb_promise, &server->cb_promises); + vnode->cb_promised = false; + } + spin_unlock(&server->cb_lock); + } + + spin_lock(&vnode->server->fs_lock); + rb_erase(&vnode->server_rb, &vnode->server->fs_vnodes); + spin_unlock(&vnode->server->fs_lock); + + vnode->server = NULL; + afs_put_server(server); +} + +/* + * finish off updating the recorded status of a file after a successful + * operation completion * - starts callback expiry timer * - adds to server's callback list */ -static void afs_vnode_finalise_status_update(struct afs_vnode *vnode, - struct afs_server *server, - int ret) +void afs_vnode_finalise_status_update(struct afs_vnode *vnode, + struct afs_server *server) { struct afs_server *oldserver = NULL; - _enter("%p,%p,%d", vnode, server, ret); + _enter("%p,%p", vnode, server); spin_lock(&vnode->lock); + clear_bit(AFS_VNODE_CB_BROKEN, &vnode->flags); + afs_vnode_note_promise(vnode, server); + vnode->update_cnt--; + ASSERTCMP(vnode->update_cnt, >=, 0); + spin_unlock(&vnode->lock); + + wake_up_all(&vnode->update_waitq); + afs_put_server(oldserver); + _leave(""); +} - vnode->flags &= ~AFS_VNODE_CHANGED; +/* + * finish off updating the recorded status of a file after an operation failed + */ +static void afs_vnode_status_update_failed(struct afs_vnode *vnode, int ret) +{ + _enter("%p,%d", vnode, ret); - if (ret == 0) { - /* adjust the callback timeout appropriately */ - afs_kafstimod_add_timer(&vnode->cb_timeout, - vnode->cb_expiry * HZ); - - spin_lock(&afs_cb_hash_lock); - list_move_tail(&vnode->cb_hash_link, - &afs_cb_hash(server, &vnode->fid)); - spin_unlock(&afs_cb_hash_lock); - - /* swap ref to old callback server with that for new callback - * server */ - oldserver = xchg(&vnode->cb_server, server); - if (oldserver != server) { - if (oldserver) { - spin_lock(&oldserver->cb_lock); - list_del_init(&vnode->cb_link); - spin_unlock(&oldserver->cb_lock); - } + spin_lock(&vnode->lock); - afs_get_server(server); - spin_lock(&server->cb_lock); - list_add_tail(&vnode->cb_link, &server->cb_promises); - spin_unlock(&server->cb_lock); - } - else { - /* same server */ - oldserver = NULL; - } - } - else if (ret == -ENOENT) { - /* the file was deleted - clear the callback timeout */ - oldserver = xchg(&vnode->cb_server, NULL); - afs_kafstimod_del_timer(&vnode->cb_timeout); + clear_bit(AFS_VNODE_CB_BROKEN, &vnode->flags); + if (ret == -ENOENT) { + /* the file was deleted on the server */ _debug("got NOENT from server - marking file deleted"); - vnode->flags |= AFS_VNODE_DELETED; + afs_vnode_deleted_remotely(vnode); } vnode->update_cnt--; - + ASSERTCMP(vnode->update_cnt, >=, 0); spin_unlock(&vnode->lock); wake_up_all(&vnode->update_waitq); - - afs_put_server(oldserver); - _leave(""); +} -} /* end afs_vnode_finalise_status_update() */ - -/*****************************************************************************/ /* * fetch file status from the volume * - don't issue a fetch if: @@ -157,9 +252,11 @@ static void afs_vnode_finalise_status_update(struct afs_vnode *vnode, * - there are any outstanding ops that will fetch the status * - TODO implement local caching */ -int afs_vnode_fetch_status(struct afs_vnode *vnode) +int afs_vnode_fetch_status(struct afs_vnode *vnode, + struct afs_vnode *auth_vnode, struct key *key) { struct afs_server *server; + unsigned long acl_order; int ret; DECLARE_WAITQUEUE(myself, current); @@ -168,38 +265,49 @@ int afs_vnode_fetch_status(struct afs_vnode *vnode) vnode->volume->vlocation->vldb.name, vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique); - if (!(vnode->flags & AFS_VNODE_CHANGED) && vnode->cb_server) { + if (!test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags) && + vnode->cb_promised) { _leave(" [unchanged]"); return 0; } - if (vnode->flags & AFS_VNODE_DELETED) { + if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) { _leave(" [deleted]"); return -ENOENT; } + acl_order = 0; + if (auth_vnode) + acl_order = auth_vnode->acl_order; + spin_lock(&vnode->lock); - if (!(vnode->flags & AFS_VNODE_CHANGED)) { + if (!test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags) && + vnode->cb_promised) { spin_unlock(&vnode->lock); _leave(" [unchanged]"); return 0; } + ASSERTCMP(vnode->update_cnt, >=, 0); + if (vnode->update_cnt > 0) { /* someone else started a fetch */ + _debug("wait on fetch %d", vnode->update_cnt); + set_current_state(TASK_UNINTERRUPTIBLE); + ASSERT(myself.func != NULL); add_wait_queue(&vnode->update_waitq, &myself); /* wait for the status to be updated */ for (;;) { - if (!(vnode->flags & AFS_VNODE_CHANGED)) + if (!test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) break; - if (vnode->flags & AFS_VNODE_DELETED) + if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) break; - /* it got updated and invalidated all before we saw - * it */ + /* check to see if it got updated and invalidated all + * before we saw it */ if (vnode->update_cnt == 0) { remove_wait_queue(&vnode->update_waitq, &myself); @@ -219,10 +327,11 @@ int afs_vnode_fetch_status(struct afs_vnode *vnode) spin_unlock(&vnode->lock); set_current_state(TASK_RUNNING); - return vnode->flags & AFS_VNODE_DELETED ? -ENOENT : 0; + return test_bit(AFS_VNODE_DELETED, &vnode->flags) ? + -ENOENT : 0; } - get_anyway: +get_anyway: /* okay... we're going to have to initiate the op */ vnode->update_cnt++; @@ -232,39 +341,60 @@ int afs_vnode_fetch_status(struct afs_vnode *vnode) * vnode */ do { /* pick a server to query */ - ret = afs_volume_pick_fileserver(vnode->volume, &server); - if (ret<0) - return ret; + server = afs_volume_pick_fileserver(vnode); + if (IS_ERR(server)) + goto no_server; - _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr)); + _debug("USING SERVER: %p{%08x}", + server, ntohl(server->addr.s_addr)); - ret = afs_rxfs_fetch_file_status(server, vnode, NULL); + ret = afs_fs_fetch_file_status(server, key, vnode, NULL, + &afs_sync_call); - } while (!afs_volume_release_fileserver(vnode->volume, server, ret)); + } while (!afs_volume_release_fileserver(vnode, server, ret)); /* adjust the flags */ - afs_vnode_finalise_status_update(vnode, server, ret); + if (ret == 0) { + _debug("adjust"); + if (auth_vnode) + afs_cache_permit(vnode, key, acl_order); + afs_vnode_finalise_status_update(vnode, server); + afs_put_server(server); + } else { + _debug("failed [%d]", ret); + afs_vnode_status_update_failed(vnode, ret); + } - _leave(" = %d", ret); + ASSERTCMP(vnode->update_cnt, >=, 0); + + _leave(" = %d [cnt %d]", ret, vnode->update_cnt); return ret; -} /* end afs_vnode_fetch_status() */ -/*****************************************************************************/ +no_server: + spin_lock(&vnode->lock); + vnode->update_cnt--; + ASSERTCMP(vnode->update_cnt, >=, 0); + spin_unlock(&vnode->lock); + _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt); + return PTR_ERR(server); +} + /* * fetch file data from the volume - * - TODO implement caching and server failover + * - TODO implement caching */ -int afs_vnode_fetch_data(struct afs_vnode *vnode, - struct afs_rxfs_fetch_descriptor *desc) +int afs_vnode_fetch_data(struct afs_vnode *vnode, struct key *key, + off_t offset, size_t length, struct page *page) { struct afs_server *server; int ret; - _enter("%s,{%u,%u,%u}", + _enter("%s{%u,%u,%u},%x,,,", vnode->volume->vlocation->vldb.name, vnode->fid.vid, vnode->fid.vnode, - vnode->fid.unique); + vnode->fid.unique, + key_serial(key)); /* this op will fetch the status */ spin_lock(&vnode->lock); @@ -275,120 +405,351 @@ int afs_vnode_fetch_data(struct afs_vnode *vnode, * vnode */ do { /* pick a server to query */ - ret = afs_volume_pick_fileserver(vnode->volume, &server); - if (ret < 0) - return ret; + 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_rxfs_fetch_file_data(server, vnode, desc, NULL); + ret = afs_fs_fetch_data(server, key, vnode, offset, length, + page, &afs_sync_call); - } while (!afs_volume_release_fileserver(vnode->volume, server, ret)); + } while (!afs_volume_release_fileserver(vnode, server, ret)); /* adjust the flags */ - afs_vnode_finalise_status_update(vnode, server, ret); + if (ret == 0) { + afs_vnode_finalise_status_update(vnode, server); + afs_put_server(server); + } else { + afs_vnode_status_update_failed(vnode, ret); + } _leave(" = %d", ret); return ret; -} /* end afs_vnode_fetch_data() */ +no_server: + spin_lock(&vnode->lock); + vnode->update_cnt--; + ASSERTCMP(vnode->update_cnt, >=, 0); + spin_unlock(&vnode->lock); + return PTR_ERR(server); +} -/*****************************************************************************/ /* - * break any outstanding callback on a vnode - * - only relevent to server that issued it + * make a file or a directory */ -int afs_vnode_give_up_callback(struct afs_vnode *vnode) +int afs_vnode_create(struct afs_vnode *vnode, struct key *key, + const char *name, umode_t mode, struct afs_fid *newfid, + struct afs_file_status *newstatus, + struct afs_callback *newcb, struct afs_server **_server) { struct afs_server *server; int ret; - _enter("%s,{%u,%u,%u}", + _enter("%s{%u,%u,%u},%x,%s,,", vnode->volume->vlocation->vldb.name, vnode->fid.vid, vnode->fid.vnode, - vnode->fid.unique); - - spin_lock(&afs_cb_hash_lock); - list_del_init(&vnode->cb_hash_link); - spin_unlock(&afs_cb_hash_lock); + vnode->fid.unique, + key_serial(key), + name); - /* set the changed flag in the vnode and release the server */ + /* this op will fetch the status on the directory we're creating in */ spin_lock(&vnode->lock); + vnode->update_cnt++; + spin_unlock(&vnode->lock); - afs_kafstimod_del_timer(&vnode->cb_timeout); + 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)); - server = xchg(&vnode->cb_server, NULL); - if (server) { - vnode->flags |= AFS_VNODE_CHANGED; + ret = afs_fs_create(server, key, vnode, name, mode, newfid, + newstatus, newcb, &afs_sync_call); - spin_lock(&server->cb_lock); - list_del_init(&vnode->cb_link); - spin_unlock(&server->cb_lock); + } while (!afs_volume_release_fileserver(vnode, server, ret)); + + /* adjust the flags */ + if (ret == 0) { + afs_vnode_finalise_status_update(vnode, server); + *_server = server; + } else { + afs_vnode_status_update_failed(vnode, ret); + *_server = NULL; } + _leave(" = %d [cnt %d]", ret, vnode->update_cnt); + return ret; + +no_server: + spin_lock(&vnode->lock); + vnode->update_cnt--; + ASSERTCMP(vnode->update_cnt, >=, 0); spin_unlock(&vnode->lock); + _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt); + return PTR_ERR(server); +} - ret = 0; - if (server) { - ret = afs_rxfs_give_up_callback(server, vnode); +/* + * remove a file or directory + */ +int afs_vnode_remove(struct afs_vnode *vnode, struct key *key, const char *name, + bool isdir) +{ + struct afs_server *server; + int ret; + + _enter("%s{%u,%u,%u},%x,%s", + vnode->volume->vlocation->vldb.name, + vnode->fid.vid, + vnode->fid.vnode, + vnode->fid.unique, + key_serial(key), + name); + + /* this op will fetch the status on the directory we're removing from */ + spin_lock(&vnode->lock); + vnode->update_cnt++; + spin_unlock(&vnode->lock); + + 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_remove(server, key, vnode, name, isdir, + &afs_sync_call); + + } while (!afs_volume_release_fileserver(vnode, server, ret)); + + /* adjust the flags */ + if (ret == 0) { + afs_vnode_finalise_status_update(vnode, server); afs_put_server(server); + } else { + afs_vnode_status_update_failed(vnode, ret); } - _leave(" = %d", ret); + _leave(" = %d [cnt %d]", ret, vnode->update_cnt); return ret; -} /* end afs_vnode_give_up_callback() */ -/*****************************************************************************/ +no_server: + spin_lock(&vnode->lock); + vnode->update_cnt--; + ASSERTCMP(vnode->update_cnt, >=, 0); + spin_unlock(&vnode->lock); + _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt); + return PTR_ERR(server); +} + /* - * match a vnode record stored in the cache + * create a hard link */ -#ifdef AFS_CACHING_SUPPORT -static cachefs_match_val_t afs_vnode_cache_match(void *target, - const void *entry) +extern int afs_vnode_link(struct afs_vnode *dvnode, struct afs_vnode *vnode, + struct key *key, const char *name) { - const struct afs_cache_vnode *cvnode = entry; - struct afs_vnode *vnode = target; + struct afs_server *server; + int ret; - _enter("{%x,%x,%Lx},{%x,%x,%Lx}", + _enter("%s{%u,%u,%u},%s{%u,%u,%u},%x,%s", + dvnode->volume->vlocation->vldb.name, + dvnode->fid.vid, + dvnode->fid.vnode, + dvnode->fid.unique, + vnode->volume->vlocation->vldb.name, + vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique, - vnode->status.version, - cvnode->vnode_id, - cvnode->vnode_unique, - cvnode->data_version); - - if (vnode->fid.vnode != cvnode->vnode_id) { - _leave(" = FAILED"); - return CACHEFS_MATCH_FAILED; + key_serial(key), + name); + + /* this op will fetch the status on the directory we're removing from */ + spin_lock(&vnode->lock); + vnode->update_cnt++; + spin_unlock(&vnode->lock); + spin_lock(&dvnode->lock); + dvnode->update_cnt++; + spin_unlock(&dvnode->lock); + + do { + /* pick a server to query */ + server = afs_volume_pick_fileserver(dvnode); + if (IS_ERR(server)) + goto no_server; + + _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr)); + + ret = afs_fs_link(server, key, dvnode, vnode, name, + &afs_sync_call); + + } while (!afs_volume_release_fileserver(dvnode, server, ret)); + + /* adjust the flags */ + if (ret == 0) { + afs_vnode_finalise_status_update(vnode, server); + afs_vnode_finalise_status_update(dvnode, server); + afs_put_server(server); + } else { + afs_vnode_status_update_failed(vnode, ret); + afs_vnode_status_update_failed(dvnode, ret); } - if (vnode->fid.unique != cvnode->vnode_unique || - vnode->status.version != cvnode->data_version) { - _leave(" = DELETE"); - return CACHEFS_MATCH_SUCCESS_DELETE; + _leave(" = %d [cnt %d]", ret, vnode->update_cnt); + return ret; + +no_server: + spin_lock(&vnode->lock); + vnode->update_cnt--; + ASSERTCMP(vnode->update_cnt, >=, 0); + spin_unlock(&vnode->lock); + spin_lock(&dvnode->lock); + dvnode->update_cnt--; + ASSERTCMP(dvnode->update_cnt, >=, 0); + spin_unlock(&dvnode->lock); + _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt); + return PTR_ERR(server); +} + +/* + * create a symbolic link + */ +int afs_vnode_symlink(struct afs_vnode *vnode, struct key *key, + const char *name, const char *content, + struct afs_fid *newfid, + struct afs_file_status *newstatus, + struct afs_server **_server) +{ + struct afs_server *server; + int ret; + + _enter("%s{%u,%u,%u},%x,%s,%s,,,", + vnode->volume->vlocation->vldb.name, + vnode->fid.vid, + vnode->fid.vnode, + vnode->fid.unique, + key_serial(key), + name, content); + + /* this op will fetch the status on the directory we're creating in */ + spin_lock(&vnode->lock); + vnode->update_cnt++; + spin_unlock(&vnode->lock); + + 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_symlink(server, key, vnode, name, content, + newfid, newstatus, &afs_sync_call); + + } while (!afs_volume_release_fileserver(vnode, server, ret)); + + /* adjust the flags */ + if (ret == 0) { + afs_vnode_finalise_status_update(vnode, server); + *_server = server; + } else { + afs_vnode_status_update_failed(vnode, ret); + *_server = NULL; } - _leave(" = SUCCESS"); - return CACHEFS_MATCH_SUCCESS; -} /* end afs_vnode_cache_match() */ -#endif + _leave(" = %d [cnt %d]", ret, vnode->update_cnt); + return ret; + +no_server: + spin_lock(&vnode->lock); + vnode->update_cnt--; + ASSERTCMP(vnode->update_cnt, >=, 0); + spin_unlock(&vnode->lock); + _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt); + return PTR_ERR(server); +} -/*****************************************************************************/ /* - * update a vnode record stored in the cache + * rename a file */ -#ifdef AFS_CACHING_SUPPORT -static void afs_vnode_cache_update(void *source, void *entry) +int afs_vnode_rename(struct afs_vnode *orig_dvnode, + struct afs_vnode *new_dvnode, + struct key *key, + const char *orig_name, + const char *new_name) { - struct afs_cache_vnode *cvnode = entry; - struct afs_vnode *vnode = source; + struct afs_server *server; + int ret; - _enter(""); + _enter("%s{%u,%u,%u},%s{%u,%u,%u},%x,%s,%s", + orig_dvnode->volume->vlocation->vldb.name, + orig_dvnode->fid.vid, + orig_dvnode->fid.vnode, + orig_dvnode->fid.unique, + new_dvnode->volume->vlocation->vldb.name, + new_dvnode->fid.vid, + new_dvnode->fid.vnode, + new_dvnode->fid.unique, + key_serial(key), + orig_name, + new_name); + + /* this op will fetch the status on both the directories we're dealing + * with */ + spin_lock(&orig_dvnode->lock); + orig_dvnode->update_cnt++; + spin_unlock(&orig_dvnode->lock); + if (new_dvnode != orig_dvnode) { + spin_lock(&new_dvnode->lock); + new_dvnode->update_cnt++; + spin_unlock(&new_dvnode->lock); + } - cvnode->vnode_id = vnode->fid.vnode; - cvnode->vnode_unique = vnode->fid.unique; - cvnode->data_version = vnode->status.version; + do { + /* pick a server to query */ + server = afs_volume_pick_fileserver(orig_dvnode); + if (IS_ERR(server)) + goto no_server; -} /* end afs_vnode_cache_update() */ -#endif + _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr)); + + ret = afs_fs_rename(server, key, orig_dvnode, orig_name, + new_dvnode, new_name, &afs_sync_call); + + } while (!afs_volume_release_fileserver(orig_dvnode, server, ret)); + + /* adjust the flags */ + if (ret == 0) { + afs_vnode_finalise_status_update(orig_dvnode, server); + if (new_dvnode != orig_dvnode) + afs_vnode_finalise_status_update(new_dvnode, server); + afs_put_server(server); + } else { + afs_vnode_status_update_failed(orig_dvnode, ret); + if (new_dvnode != orig_dvnode) + afs_vnode_status_update_failed(new_dvnode, ret); + } + + _leave(" = %d [cnt %d]", ret, orig_dvnode->update_cnt); + return ret; + +no_server: + spin_lock(&orig_dvnode->lock); + orig_dvnode->update_cnt--; + ASSERTCMP(orig_dvnode->update_cnt, >=, 0); + spin_unlock(&orig_dvnode->lock); + if (new_dvnode != orig_dvnode) { + spin_lock(&new_dvnode->lock); + new_dvnode->update_cnt--; + ASSERTCMP(new_dvnode->update_cnt, >=, 0); + spin_unlock(&new_dvnode->lock); + } + _leave(" = %ld [cnt %d]", PTR_ERR(server), orig_dvnode->update_cnt); + return PTR_ERR(server); +} diff --git a/fs/afs/vnode.h b/fs/afs/vnode.h deleted file mode 100644 index b86a971..0000000 --- a/fs/afs/vnode.h +++ /dev/null @@ -1,94 +0,0 @@ -/* vnode.h: AFS vnode record - * - * Copyright (C) 2002 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. - */ - -#ifndef _LINUX_AFS_VNODE_H -#define _LINUX_AFS_VNODE_H - -#include <linux/fs.h> -#include "server.h" -#include "kafstimod.h" -#include "cache.h" - -#ifdef __KERNEL__ - -struct afs_rxfs_fetch_descriptor; - -/*****************************************************************************/ -/* - * vnode catalogue entry - */ -struct afs_cache_vnode -{ - afs_vnodeid_t vnode_id; /* vnode ID */ - unsigned vnode_unique; /* vnode ID uniquifier */ - afs_dataversion_t data_version; /* data version */ -}; - -#ifdef AFS_CACHING_SUPPORT -extern struct cachefs_index_def afs_vnode_cache_index_def; -#endif - -/*****************************************************************************/ -/* - * AFS inode private data - */ -struct afs_vnode -{ - struct inode vfs_inode; /* the VFS's inode record */ - - struct afs_volume *volume; /* volume on which vnode resides */ - struct afs_fid fid; /* the file identifier for this inode */ - struct afs_file_status status; /* AFS status info for this file */ -#ifdef AFS_CACHING_SUPPORT - struct cachefs_cookie *cache; /* caching cookie */ -#endif - - wait_queue_head_t update_waitq; /* status fetch waitqueue */ - unsigned update_cnt; /* number of outstanding ops that will update the - * status */ - spinlock_t lock; /* waitqueue/flags lock */ - unsigned flags; -#define AFS_VNODE_CHANGED 0x00000001 /* set if vnode reported changed by callback */ -#define AFS_VNODE_DELETED 0x00000002 /* set if vnode deleted on server */ -#define AFS_VNODE_MOUNTPOINT 0x00000004 /* set if vnode is a mountpoint symlink */ - - /* outstanding callback notification on this file */ - struct afs_server *cb_server; /* server that made the current promise */ - struct list_head cb_link; /* link in server's promises list */ - struct list_head cb_hash_link; /* link in master callback hash */ - struct afs_timer cb_timeout; /* timeout on promise */ - unsigned cb_version; /* callback version */ - unsigned cb_expiry; /* callback expiry time */ - afs_callback_type_t cb_type; /* type of callback */ -}; - -static inline struct afs_vnode *AFS_FS_I(struct inode *inode) -{ - return container_of(inode,struct afs_vnode,vfs_inode); -} - -static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) -{ - return &vnode->vfs_inode; -} - -extern int afs_vnode_fetch_status(struct afs_vnode *vnode); - -extern int afs_vnode_fetch_data(struct afs_vnode *vnode, - struct afs_rxfs_fetch_descriptor *desc); - -extern int afs_vnode_give_up_callback(struct afs_vnode *vnode); - -extern struct afs_timer_ops afs_vnode_cb_timed_out_ops; - -#endif /* __KERNEL__ */ - -#endif /* _LINUX_AFS_VNODE_H */ diff --git a/fs/afs/volume.c b/fs/afs/volume.c index 768c6db..dd160ca 100644 --- a/fs/afs/volume.c +++ b/fs/afs/volume.c @@ -1,6 +1,6 @@ -/* volume.c: AFS volume management +/* AFS volume management * - * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. + * Copyright (C) 2002, 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 @@ -15,35 +15,10 @@ #include <linux/slab.h> #include <linux/fs.h> #include <linux/pagemap.h> -#include "volume.h" -#include "vnode.h" -#include "cell.h" -#include "cache.h" -#include "cmservice.h" -#include "fsclient.h" -#include "vlclient.h" #include "internal.h" -#ifdef __KDEBUG static const char *afs_voltypes[] = { "R/W", "R/O", "BAK" }; -#endif - -#ifdef AFS_CACHING_SUPPORT -static cachefs_match_val_t afs_volume_cache_match(void *target, - const void *entry); -static void afs_volume_cache_update(void *source, void *entry); - -struct cachefs_index_def afs_volume_cache_index_def = { - .name = "volume", - .data_size = sizeof(struct afs_cache_vhash), - .keys[0] = { CACHEFS_INDEX_KEYS_BIN, 1 }, - .keys[1] = { CACHEFS_INDEX_KEYS_BIN, 1 }, - .match = afs_volume_cache_match, - .update = afs_volume_cache_update, -}; -#endif -/*****************************************************************************/ /* * lookup a volume by name * - this can be one of the following: @@ -66,118 +41,52 @@ struct cachefs_index_def afs_volume_cache_index_def = { * - Rule 3: If parent volume is R/W, then only mount R/W volume unless * explicitly told otherwise */ -int afs_volume_lookup(const char *name, struct afs_cell *cell, int rwpath, - struct afs_volume **_volume) +struct afs_volume *afs_volume_lookup(struct afs_mount_params *params) { struct afs_vlocation *vlocation = NULL; struct afs_volume *volume = NULL; - afs_voltype_t type; - const char *cellname, *volname, *suffix; + struct afs_server *server = NULL; char srvtmask; - int force, ret, loop, cellnamesz, volnamesz; - - _enter("%s,,%d,", name, rwpath); - - if (!name || (name[0] != '%' && name[0] != '#') || !name[1]) { - printk("kAFS: unparsable volume name\n"); - return -EINVAL; - } - - /* determine the type of volume we're looking for */ - force = 0; - type = AFSVL_ROVOL; - - if (rwpath || name[0] == '%') { - type = AFSVL_RWVOL; - force = 1; - } - - suffix = strrchr(name, '.'); - if (suffix) { - if (strcmp(suffix, ".readonly") == 0) { - type = AFSVL_ROVOL; - force = 1; - } - else if (strcmp(suffix, ".backup") == 0) { - type = AFSVL_BACKVOL; - force = 1; - } - else if (suffix[1] == 0) { - } - else { - suffix = NULL; - } - } + int ret, loop; - /* split the cell and volume names */ - name++; - volname = strchr(name, ':'); - if (volname) { - cellname = name; - cellnamesz = volname - name; - volname++; - } - else { - volname = name; - cellname = NULL; - cellnamesz = 0; - } - - volnamesz = suffix ? suffix - volname : strlen(volname); - - _debug("CELL:%*.*s [%p] VOLUME:%*.*s SUFFIX:%s TYPE:%d%s", - cellnamesz, cellnamesz, cellname ?: "", cell, - volnamesz, volnamesz, volname, suffix ?: "-", - type, - force ? " FORCE" : ""); - - /* lookup the cell record */ - if (cellname || !cell) { - ret = afs_cell_lookup(cellname, cellnamesz, &cell); - if (ret<0) { - printk("kAFS: unable to lookup cell '%s'\n", - cellname ?: ""); - goto error; - } - } - else { - afs_get_cell(cell); - } + _enter("{%*.*s,%d}", + params->volnamesz, params->volnamesz, params->volname, params->rwpath); /* lookup the volume location record */ - ret = afs_vlocation_lookup(cell, volname, volnamesz, &vlocation); - if (ret < 0) + vlocation = afs_vlocation_lookup(params->cell, params->key, + params->volname, params->volnamesz); + if (IS_ERR(vlocation)) { + ret = PTR_ERR(vlocation); + vlocation = NULL; goto error; + } /* make the final decision on the type we want */ ret = -ENOMEDIUM; - if (force && !(vlocation->vldb.vidmask & (1 << type))) + if (params->force && !(vlocation->vldb.vidmask & (1 << params->type))) goto error; srvtmask = 0; for (loop = 0; loop < vlocation->vldb.nservers; loop++) srvtmask |= vlocation->vldb.srvtmask[loop]; - if (force) { - if (!(srvtmask & (1 << type))) + if (params->force) { + if (!(srvtmask & (1 << params->type))) goto error; - } - else if (srvtmask & AFS_VOL_VTM_RO) { - type = AFSVL_ROVOL; - } - else if (srvtmask & AFS_VOL_VTM_RW) { - type = AFSVL_RWVOL; - } - else { + } else if (srvtmask & AFS_VOL_VTM_RO) { + params->type = AFSVL_ROVOL; + } else if (srvtmask & AFS_VOL_VTM_RW) { + params->type = AFSVL_RWVOL; + } else { goto error; } - down_write(&cell->vl_sem); + down_write(¶ms->cell->vl_sem); /* is the volume already active? */ - if (vlocation->vols[type]) { + if (vlocation->vols[params->type]) { /* yes - re-use it */ - volume = vlocation->vols[type]; + volume = vlocation->vols[params->type]; afs_get_volume(volume); goto success; } @@ -191,23 +100,24 @@ int afs_volume_lookup(const char *name, struct afs_cell *cell, int rwpath, goto error_up; atomic_set(&volume->usage, 1); - volume->type = type; - volume->type_force = force; - volume->cell = cell; - volume->vid = vlocation->vldb.vid[type]; + volume->type = params->type; + volume->type_force = params->force; + volume->cell = params->cell; + volume->vid = vlocation->vldb.vid[params->type]; init_rwsem(&volume->server_sem); /* look up all the applicable server records */ for (loop = 0; loop < 8; loop++) { if (vlocation->vldb.srvtmask[loop] & (1 << volume->type)) { - ret = afs_server_lookup( - volume->cell, - &vlocation->vldb.servers[loop], - &volume->servers[volume->nservers]); - if (ret < 0) + server = afs_lookup_server( + volume->cell, &vlocation->vldb.servers[loop]); + if (IS_ERR(server)) { + ret = PTR_ERR(server); goto error_discard; + } + volume->servers[volume->nservers] = server; volume->nservers++; } } @@ -223,35 +133,34 @@ int afs_volume_lookup(const char *name, struct afs_cell *cell, int rwpath, afs_get_vlocation(vlocation); volume->vlocation = vlocation; - vlocation->vols[type] = volume; + vlocation->vols[volume->type] = volume; - success: +success: _debug("kAFS selected %s volume %08x", afs_voltypes[volume->type], volume->vid); - *_volume = volume; - ret = 0; + up_write(¶ms->cell->vl_sem); + afs_put_vlocation(vlocation); + _leave(" = %p", volume); + return volume; /* clean up */ - error_up: - up_write(&cell->vl_sem); - error: +error_up: + up_write(¶ms->cell->vl_sem); +error: afs_put_vlocation(vlocation); - afs_put_cell(cell); - - _leave(" = %d (%p)", ret, volume); - return ret; + _leave(" = %d", ret); + return ERR_PTR(ret); - error_discard: - up_write(&cell->vl_sem); +error_discard: + up_write(¶ms->cell->vl_sem); for (loop = volume->nservers - 1; loop >= 0; loop--) afs_put_server(volume->servers[loop]); kfree(volume); goto error; -} /* end afs_volume_lookup() */ +} -/*****************************************************************************/ /* * destroy a volume record */ @@ -265,10 +174,9 @@ void afs_put_volume(struct afs_volume *volume) _enter("%p", volume); - vlocation = volume->vlocation; + ASSERTCMP(atomic_read(&volume->usage), >, 0); - /* sanity check */ - BUG_ON(atomic_read(&volume->usage) <= 0); + vlocation = volume->vlocation; /* to prevent a race, the decrement and the dequeue must be effectively * atomic */ @@ -296,21 +204,27 @@ void afs_put_volume(struct afs_volume *volume) kfree(volume); _leave(" [destroyed]"); -} /* end afs_put_volume() */ +} -/*****************************************************************************/ /* * pick a server to use to try accessing this volume * - returns with an elevated usage count on the server chosen */ -int afs_volume_pick_fileserver(struct afs_volume *volume, - struct afs_server **_server) +struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *vnode) { + struct afs_volume *volume = vnode->volume; struct afs_server *server; int ret, state, loop; _enter("%s", volume->vlocation->vldb.name); + /* stick with the server we're already using if we can */ + if (vnode->server && vnode->server->fs_state == 0) { + afs_get_server(vnode->server); + _leave(" = %p [current]", vnode->server); + return vnode->server; + } + down_read(&volume->server_sem); /* handle the no-server case */ @@ -318,7 +232,7 @@ int afs_volume_pick_fileserver(struct afs_volume *volume, ret = volume->rjservers ? -ENOMEDIUM : -ESTALE; up_read(&volume->server_sem); _leave(" = %d [no servers]", ret); - return ret; + return ERR_PTR(ret); } /* basically, just search the list for the first live server and use @@ -328,15 +242,16 @@ int afs_volume_pick_fileserver(struct afs_volume *volume, server = volume->servers[loop]; state = server->fs_state; + _debug("consider %d [%d]", loop, state); + switch (state) { /* found an apparently healthy server */ case 0: afs_get_server(server); up_read(&volume->server_sem); - *_server = server; - _leave(" = 0 (picked %08x)", - ntohl(server->addr.s_addr)); - return 0; + _leave(" = %p (picked %08x)", + server, ntohl(server->addr.s_addr)); + return server; case -ENETUNREACH: if (ret == 0) @@ -372,20 +287,21 @@ int afs_volume_pick_fileserver(struct afs_volume *volume, */ up_read(&volume->server_sem); _leave(" = %d", ret); - return ret; -} /* end afs_volume_pick_fileserver() */ + return ERR_PTR(ret); +} -/*****************************************************************************/ /* * release a server after use * - releases the ref on the server struct that was acquired by picking * - records result of using a particular server to access a volume * - return 0 to try again, 1 if okay or to issue error + * - the caller must release the server struct if result was 0 */ -int afs_volume_release_fileserver(struct afs_volume *volume, +int afs_volume_release_fileserver(struct afs_vnode *vnode, struct afs_server *server, int result) { + struct afs_volume *volume = vnode->volume; unsigned loop; _enter("%s,%08x,%d", @@ -396,14 +312,16 @@ int afs_volume_release_fileserver(struct afs_volume *volume, /* success */ case 0: server->fs_act_jif = jiffies; - break; + server->fs_state = 0; + _leave(""); + return 1; /* the fileserver denied all knowledge of the volume */ case -ENOMEDIUM: server->fs_act_jif = jiffies; down_write(&volume->server_sem); - /* first, find where the server is in the active list (if it + /* firstly, find where the server is in the active list (if it * is) */ for (loop = 0; loop < volume->nservers; loop++) if (volume->servers[loop] == server) @@ -441,6 +359,7 @@ int afs_volume_release_fileserver(struct afs_volume *volume, case -ENETUNREACH: case -EHOSTUNREACH: case -ECONNREFUSED: + case -ETIME: case -ETIMEDOUT: case -EREMOTEIO: /* mark the server as dead @@ -460,60 +379,17 @@ int afs_volume_release_fileserver(struct afs_volume *volume, server->fs_act_jif = jiffies; case -ENOMEM: case -ENONET: - break; + /* tell the caller to accept the result */ + afs_put_server(server); + _leave(" [local failure]"); + return 1; } - /* tell the caller to accept the result */ - afs_put_server(server); - _leave(""); - return 1; - /* tell the caller to loop around and try the next server */ - try_next_server_upw: +try_next_server_upw: up_write(&volume->server_sem); - try_next_server: +try_next_server: afs_put_server(server); _leave(" [try next server]"); return 0; - -} /* end afs_volume_release_fileserver() */ - -/*****************************************************************************/ -/* - * match a volume hash record stored in the cache - */ -#ifdef AFS_CACHING_SUPPORT -static cachefs_match_val_t afs_volume_cache_match(void *target, - const void *entry) -{ - const struct afs_cache_vhash *vhash = entry; - struct afs_volume *volume = target; - - _enter("{%u},{%u}", volume->type, vhash->vtype); - - if (volume->type == vhash->vtype) { - _leave(" = SUCCESS"); - return CACHEFS_MATCH_SUCCESS; - } - - _leave(" = FAILED"); - return CACHEFS_MATCH_FAILED; -} /* end afs_volume_cache_match() */ -#endif - -/*****************************************************************************/ -/* - * update a volume hash record stored in the cache - */ -#ifdef AFS_CACHING_SUPPORT -static void afs_volume_cache_update(void *source, void *entry) -{ - struct afs_cache_vhash *vhash = entry; - struct afs_volume *volume = source; - - _enter(""); - - vhash->vtype = volume->type; - -} /* end afs_volume_cache_update() */ -#endif +} diff --git a/fs/afs/volume.h b/fs/afs/volume.h deleted file mode 100644 index bfdcf19..0000000 --- a/fs/afs/volume.h +++ /dev/null @@ -1,140 +0,0 @@ -/* volume.h: AFS volume management - * - * Copyright (C) 2002 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. - */ - -#ifndef _LINUX_AFS_VOLUME_H -#define _LINUX_AFS_VOLUME_H - -#include "types.h" -#include "fsclient.h" -#include "kafstimod.h" -#include "kafsasyncd.h" -#include "cache.h" - -typedef enum { - AFS_VLUPD_SLEEP, /* sleeping waiting for update timer to fire */ - AFS_VLUPD_PENDING, /* on pending queue */ - AFS_VLUPD_INPROGRESS, /* op in progress */ - AFS_VLUPD_BUSYSLEEP, /* sleeping because server returned EBUSY */ - -} __attribute__((packed)) afs_vlocation_upd_t; - -/*****************************************************************************/ -/* - * entry in the cached volume location catalogue - */ -struct afs_cache_vlocation -{ - uint8_t name[64]; /* volume name (lowercase, padded with NULs) */ - uint8_t nservers; /* number of entries used in servers[] */ - uint8_t vidmask; /* voltype mask for vid[] */ - uint8_t srvtmask[8]; /* voltype masks for servers[] */ -#define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ -#define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ -#define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ - - afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */ - struct in_addr servers[8]; /* fileserver addresses */ - time_t rtime; /* last retrieval time */ -}; - -#ifdef AFS_CACHING_SUPPORT -extern struct cachefs_index_def afs_vlocation_cache_index_def; -#endif - -/*****************************************************************************/ -/* - * volume -> vnode hash table entry - */ -struct afs_cache_vhash -{ - afs_voltype_t vtype; /* which volume variation */ - uint8_t hash_bucket; /* which hash bucket this represents */ -} __attribute__((packed)); - -#ifdef AFS_CACHING_SUPPORT -extern struct cachefs_index_def afs_volume_cache_index_def; -#endif - -/*****************************************************************************/ -/* - * AFS volume location record - */ -struct afs_vlocation -{ - atomic_t usage; - struct list_head link; /* link in cell volume location list */ - struct afs_timer timeout; /* decaching timer */ - struct afs_cell *cell; /* cell to which volume belongs */ -#ifdef AFS_CACHING_SUPPORT - struct cachefs_cookie *cache; /* caching cookie */ -#endif - struct afs_cache_vlocation vldb; /* volume information DB record */ - struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ - rwlock_t lock; /* access lock */ - unsigned long read_jif; /* time at which last read from vlserver */ - struct afs_timer upd_timer; /* update timer */ - struct afs_async_op upd_op; /* update operation */ - afs_vlocation_upd_t upd_state; /* update state */ - unsigned short upd_first_svix; /* first server index during update */ - unsigned short upd_curr_svix; /* current server index during update */ - unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ - unsigned short upd_busy_cnt; /* EBUSY count during update */ - unsigned short valid; /* T if valid */ -}; - -extern int afs_vlocation_lookup(struct afs_cell *cell, - const char *name, - unsigned namesz, - struct afs_vlocation **_vlocation); - -#define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0) - -extern void afs_put_vlocation(struct afs_vlocation *vlocation); -extern void afs_vlocation_do_timeout(struct afs_vlocation *vlocation); - -/*****************************************************************************/ -/* - * AFS volume access record - */ -struct afs_volume -{ - atomic_t usage; - struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */ - struct afs_vlocation *vlocation; /* volume location */ -#ifdef AFS_CACHING_SUPPORT - struct cachefs_cookie *cache; /* caching cookie */ -#endif - afs_volid_t vid; /* volume ID */ - afs_voltype_t type; /* type of volume */ - char type_force; /* force volume type (suppress R/O -> R/W) */ - unsigned short nservers; /* number of server slots filled */ - unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */ - struct afs_server *servers[8]; /* servers on which volume resides (ordered) */ - struct rw_semaphore server_sem; /* lock for accessing current server */ -}; - -extern int afs_volume_lookup(const char *name, - struct afs_cell *cell, - int rwpath, - struct afs_volume **_volume); - -#define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0) - -extern void afs_put_volume(struct afs_volume *volume); - -extern int afs_volume_pick_fileserver(struct afs_volume *volume, - struct afs_server **_server); - -extern int afs_volume_release_fileserver(struct afs_volume *volume, - struct afs_server *server, - int result); - -#endif /* _LINUX_AFS_VOLUME_H */ diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index 8b1c5d8..c68b055 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -266,6 +266,23 @@ static int do_siocgstamp(unsigned int fd, unsigned int cmd, unsigned long arg) return err; } +static int do_siocgstampns(unsigned int fd, unsigned int cmd, unsigned long arg) +{ + struct compat_timespec __user *up = compat_ptr(arg); + struct timespec kts; + mm_segment_t old_fs = get_fs(); + int err; + + set_fs(KERNEL_DS); + err = sys_ioctl(fd, cmd, (unsigned long)&kts); + set_fs(old_fs); + if (!err) { + err = put_user(kts.tv_sec, &up->tv_sec); + err |= __put_user(kts.tv_nsec, &up->tv_nsec); + } + return err; +} + struct ifmap32 { compat_ulong_t mem_start; compat_ulong_t mem_end; @@ -2437,6 +2454,7 @@ HANDLE_IOCTL(SIOCBRDELIF, dev_ifsioc) /* Note SIOCRTMSG is no longer, so this is safe and * the user would have seen just an -EINVAL anyways. */ HANDLE_IOCTL(SIOCRTMSG, ret_einval) HANDLE_IOCTL(SIOCGSTAMP, do_siocgstamp) +HANDLE_IOCTL(SIOCGSTAMPNS, do_siocgstampns) #endif #ifdef CONFIG_BLOCK HANDLE_IOCTL(HDIO_GETGEO, hdio_getgeo) diff --git a/fs/ecryptfs/netlink.c b/fs/ecryptfs/netlink.c index e3aa225..fe91863 100644 --- a/fs/ecryptfs/netlink.c +++ b/fs/ecryptfs/netlink.c @@ -97,7 +97,7 @@ out: */ static int ecryptfs_process_nl_response(struct sk_buff *skb) { - struct nlmsghdr *nlh = (struct nlmsghdr*)skb->data; + struct nlmsghdr *nlh = nlmsg_hdr(skb); struct ecryptfs_message *msg = NLMSG_DATA(nlh); int rc; @@ -181,7 +181,7 @@ receive: "rc = [%d]\n", rc); return; } - nlh = (struct nlmsghdr *)skb->data; + nlh = nlmsg_hdr(skb); if (!NLMSG_OK(nlh, skb->len)) { ecryptfs_printk(KERN_ERR, "Received corrupt netlink " "message\n"); @@ -229,7 +229,7 @@ int ecryptfs_init_netlink(void) ecryptfs_nl_sock = netlink_kernel_create(NETLINK_ECRYPTFS, 0, ecryptfs_receive_nl_message, - THIS_MODULE); + NULL, THIS_MODULE); if (!ecryptfs_nl_sock) { rc = -EIO; ecryptfs_printk(KERN_ERR, "Failed to create netlink socket\n"); diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c index 23029f4..1d3b7a9 100644 --- a/fs/jffs2/fs.c +++ b/fs/jffs2/fs.c @@ -670,6 +670,13 @@ static int jffs2_flash_setup(struct jffs2_sb_info *c) { return ret; } + /* and an UBI volume */ + if (jffs2_ubivol(c)) { + ret = jffs2_ubivol_setup(c); + if (ret) + return ret; + } + return ret; } @@ -688,4 +695,9 @@ void jffs2_flash_cleanup(struct jffs2_sb_info *c) { if (jffs2_nor_wbuf_flash(c)) { jffs2_nor_wbuf_flash_cleanup(c); } + + /* and an UBI volume */ + if (jffs2_ubivol(c)) { + jffs2_ubivol_cleanup(c); + } } diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h index 2379c7e..80daea9 100644 --- a/fs/jffs2/os-linux.h +++ b/fs/jffs2/os-linux.h @@ -96,6 +96,9 @@ static inline void jffs2_init_inode_info(struct jffs2_inode_info *f) #define jffs2_nor_wbuf_flash(c) (0) #define jffs2_nor_wbuf_flash_setup(c) (0) #define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0) +#define jffs2_ubivol(c) (0) +#define jffs2_ubivol_setup(c) (0) +#define jffs2_ubivol_cleanup(c) do {} while (0) #else /* NAND and/or ECC'd NOR support present */ @@ -131,6 +134,9 @@ void jffs2_nand_flash_cleanup(struct jffs2_sb_info *c); #define jffs2_dataflash(c) (c->mtd->type == MTD_DATAFLASH) int jffs2_dataflash_setup(struct jffs2_sb_info *c); void jffs2_dataflash_cleanup(struct jffs2_sb_info *c); +#define jffs2_ubivol(c) (c->mtd->type == MTD_UBIVOLUME) +int jffs2_ubivol_setup(struct jffs2_sb_info *c); +void jffs2_ubivol_cleanup(struct jffs2_sb_info *c); #define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && ! (c->mtd->flags & MTD_BIT_WRITEABLE)) int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c); diff --git a/fs/jffs2/wbuf.c b/fs/jffs2/wbuf.c index dafcd41..c556e85 100644 --- a/fs/jffs2/wbuf.c +++ b/fs/jffs2/wbuf.c @@ -1209,3 +1209,27 @@ int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c) { void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c) { kfree(c->wbuf); } + +int jffs2_ubivol_setup(struct jffs2_sb_info *c) { + c->cleanmarker_size = 0; + + if (c->mtd->writesize == 1) + /* We do not need write-buffer */ + return 0; + + init_rwsem(&c->wbuf_sem); + + c->wbuf_pagesize = c->mtd->writesize; + c->wbuf_ofs = 0xFFFFFFFF; + c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); + if (!c->wbuf) + return -ENOMEM; + + printk(KERN_INFO "JFFS2 write-buffering enabled buffer (%d) erasesize (%d)\n", c->wbuf_pagesize, c->sector_size); + + return 0; +} + +void jffs2_ubivol_cleanup(struct jffs2_sb_info *c) { + kfree(c->wbuf); +} diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c index f27e5378..a0c8667 100644 --- a/fs/ocfs2/alloc.c +++ b/fs/ocfs2/alloc.c @@ -27,6 +27,7 @@ #include <linux/types.h> #include <linux/slab.h> #include <linux/highmem.h> +#include <linux/swap.h> #define MLOG_MASK_PREFIX ML_DISK_ALLOC #include <cluster/masklog.h> @@ -34,6 +35,7 @@ #include "ocfs2.h" #include "alloc.h" +#include "aops.h" #include "dlmglue.h" #include "extent_map.h" #include "inode.h" @@ -47,63 +49,243 @@ #include "buffer_head_io.h" -static int ocfs2_extent_contig(struct inode *inode, - struct ocfs2_extent_rec *ext, - u64 blkno); +static void ocfs2_free_truncate_context(struct ocfs2_truncate_context *tc); -static int ocfs2_create_new_meta_bhs(struct ocfs2_super *osb, - handle_t *handle, - struct inode *inode, - int wanted, - struct ocfs2_alloc_context *meta_ac, - struct buffer_head *bhs[]); +/* + * Structures which describe a path through a btree, and functions to + * manipulate them. + * + * The idea here is to be as generic as possible with the tree + * manipulation code. + */ +struct ocfs2_path_item { + struct buffer_head *bh; + struct ocfs2_extent_list *el; +}; -static int ocfs2_add_branch(struct ocfs2_super *osb, - handle_t *handle, - struct inode *inode, - struct buffer_head *fe_bh, - struct buffer_head *eb_bh, - struct buffer_head *last_eb_bh, - struct ocfs2_alloc_context *meta_ac); +#define OCFS2_MAX_PATH_DEPTH 5 -static int ocfs2_shift_tree_depth(struct ocfs2_super *osb, - handle_t *handle, - struct inode *inode, - struct buffer_head *fe_bh, - struct ocfs2_alloc_context *meta_ac, - struct buffer_head **ret_new_eb_bh); +struct ocfs2_path { + int p_tree_depth; + struct ocfs2_path_item p_node[OCFS2_MAX_PATH_DEPTH]; +}; -static int ocfs2_do_insert_extent(struct ocfs2_super *osb, - handle_t *handle, - struct inode *inode, - struct buffer_head *fe_bh, - u64 blkno, - u32 new_clusters); +#define path_root_bh(_path) ((_path)->p_node[0].bh) +#define path_root_el(_path) ((_path)->p_node[0].el) +#define path_leaf_bh(_path) ((_path)->p_node[(_path)->p_tree_depth].bh) +#define path_leaf_el(_path) ((_path)->p_node[(_path)->p_tree_depth].el) +#define path_num_items(_path) ((_path)->p_tree_depth + 1) -static int ocfs2_find_branch_target(struct ocfs2_super *osb, - struct inode *inode, - struct buffer_head *fe_bh, - struct buffer_head **target_bh); +/* + * Reset the actual path elements so that we can re-use the structure + * to build another path. Generally, this involves freeing the buffer + * heads. + */ +static void ocfs2_reinit_path(struct ocfs2_path *path, int keep_root) +{ + int i, start = 0, depth = 0; + struct ocfs2_path_item *node; -static int ocfs2_find_new_last_ext_blk(struct ocfs2_super *osb, - struct inode *inode, - struct ocfs2_dinode *fe, - unsigned int new_i_clusters, - struct buffer_head *old_last_eb, - struct buffer_head **new_last_eb); + if (keep_root) + start = 1; + + for(i = start; i < path_num_items(path); i++) { + node = &path->p_node[i]; + + brelse(node->bh); + node->bh = NULL; + node->el = NULL; + } + + /* + * Tree depth may change during truncate, or insert. If we're + * keeping the root extent list, then make sure that our path + * structure reflects the proper depth. + */ + if (keep_root) + depth = le16_to_cpu(path_root_el(path)->l_tree_depth); + + path->p_tree_depth = depth; +} + +static void ocfs2_free_path(struct ocfs2_path *path) +{ + if (path) { + ocfs2_reinit_path(path, 0); + kfree(path); + } +} + +/* + * Make the *dest path the same as src and re-initialize src path to + * have a root only. + */ +static void ocfs2_mv_path(struct ocfs2_path *dest, struct ocfs2_path *src) +{ + int i; + + BUG_ON(path_root_bh(dest) != path_root_bh(src)); + + for(i = 1; i < OCFS2_MAX_PATH_DEPTH; i++) { + brelse(dest->p_node[i].bh); + + dest->p_node[i].bh = src->p_node[i].bh; + dest->p_node[i].el = src->p_node[i].el; + + src->p_node[i].bh = NULL; + src->p_node[i].el = NULL; + } +} + +/* + * Insert an extent block at given index. + * + * This will not take an additional reference on eb_bh. + */ +static inline void ocfs2_path_insert_eb(struct ocfs2_path *path, int index, + struct buffer_head *eb_bh) +{ + struct ocfs2_extent_block *eb = (struct ocfs2_extent_block *)eb_bh->b_data; + + /* + * Right now, no root bh is an extent block, so this helps + * catch code errors with dinode trees. The assertion can be + * safely removed if we ever need to insert extent block + * structures at the root. + */ + BUG_ON(index == 0); + + path->p_node[index].bh = eb_bh; + path->p_node[index].el = &eb->h_list; +} + +static struct ocfs2_path *ocfs2_new_path(struct buffer_head *root_bh, + struct ocfs2_extent_list *root_el) +{ + struct ocfs2_path *path; + + BUG_ON(le16_to_cpu(root_el->l_tree_depth) >= OCFS2_MAX_PATH_DEPTH); + + path = kzalloc(sizeof(*path), GFP_NOFS); + if (path) { + path->p_tree_depth = le16_to_cpu(root_el->l_tree_depth); + get_bh(root_bh); + path_root_bh(path) = root_bh; + path_root_el(path) = root_el; + } + + return path; +} + +/* + * Allocate and initialize a new path based on a disk inode tree. + */ +static struct ocfs2_path *ocfs2_new_inode_path(struct buffer_head *di_bh) +{ + struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; + struct ocfs2_extent_list *el = &di->id2.i_list; + + return ocfs2_new_path(di_bh, el); +} + +/* + * Convenience function to journal all components in a path. + */ +static int ocfs2_journal_access_path(struct inode *inode, handle_t *handle, + struct ocfs2_path *path) +{ + int i, ret = 0; + + if (!path) + goto out; + + for(i = 0; i < path_num_items(path); i++) { + ret = ocfs2_journal_access(handle, inode, path->p_node[i].bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret < 0) { + mlog_errno(ret); + goto out; + } + } + +out: + return ret; +} + +enum ocfs2_contig_type { + CONTIG_NONE = 0, + CONTIG_LEFT, + CONTIG_RIGHT +}; -static void ocfs2_free_truncate_context(struct ocfs2_truncate_context *tc); -static int ocfs2_extent_contig(struct inode *inode, - struct ocfs2_extent_rec *ext, - u64 blkno) +/* + * NOTE: ocfs2_block_extent_contig(), ocfs2_extents_adjacent() and + * ocfs2_extent_contig only work properly against leaf nodes! + */ +static int ocfs2_block_extent_contig(struct super_block *sb, + struct ocfs2_extent_rec *ext, + u64 blkno) +{ + u64 blk_end = le64_to_cpu(ext->e_blkno); + + blk_end += ocfs2_clusters_to_blocks(sb, + le16_to_cpu(ext->e_leaf_clusters)); + + return blkno == blk_end; +} + +static int ocfs2_extents_adjacent(struct ocfs2_extent_rec *left, + struct ocfs2_extent_rec *right) +{ + u32 left_range; + + left_range = le32_to_cpu(left->e_cpos) + + le16_to_cpu(left->e_leaf_clusters); + + return (left_range == le32_to_cpu(right->e_cpos)); +} + +static enum ocfs2_contig_type + ocfs2_extent_contig(struct inode *inode, + struct ocfs2_extent_rec *ext, + struct ocfs2_extent_rec *insert_rec) { - return blkno == (le64_to_cpu(ext->e_blkno) + - ocfs2_clusters_to_blocks(inode->i_sb, - le32_to_cpu(ext->e_clusters))); + u64 blkno = le64_to_cpu(insert_rec->e_blkno); + + if (ocfs2_extents_adjacent(ext, insert_rec) && + ocfs2_block_extent_contig(inode->i_sb, ext, blkno)) + return CONTIG_RIGHT; + + blkno = le64_to_cpu(ext->e_blkno); + if (ocfs2_extents_adjacent(insert_rec, ext) && + ocfs2_block_extent_contig(inode->i_sb, insert_rec, blkno)) + return CONTIG_LEFT; + + return CONTIG_NONE; } /* + * NOTE: We can have pretty much any combination of contiguousness and + * appending. + * + * The usefulness of APPEND_TAIL is more in that it lets us know that + * we'll have to update the path to that leaf. + */ +enum ocfs2_append_type { + APPEND_NONE = 0, + APPEND_TAIL, +}; + +struct ocfs2_insert_type { + enum ocfs2_append_type ins_appending; + enum ocfs2_contig_type ins_contig; + int ins_contig_index; + int ins_free_records; + int ins_tree_depth; +}; + +/* * How many free extents have we got before we need more meta data? */ int ocfs2_num_free_extents(struct ocfs2_super *osb, @@ -242,6 +424,28 @@ bail: } /* + * Helper function for ocfs2_add_branch() and ocfs2_shift_tree_depth(). + * + * Returns the sum of the rightmost extent rec logical offset and + * cluster count. + * + * ocfs2_add_branch() uses this to determine what logical cluster + * value should be populated into the leftmost new branch records. + * + * ocfs2_shift_tree_depth() uses this to determine the # clusters + * value for the new topmost tree record. + */ +static inline u32 ocfs2_sum_rightmost_rec(struct ocfs2_extent_list *el) +{ + int i; + + i = le16_to_cpu(el->l_next_free_rec) - 1; + + return le32_to_cpu(el->l_recs[i].e_cpos) + + ocfs2_rec_clusters(el, &el->l_recs[i]); +} + +/* * Add an entire tree branch to our inode. eb_bh is the extent block * to start at, if we don't want to start the branch at the dinode * structure. @@ -250,7 +454,7 @@ bail: * for the new last extent block. * * the new branch will be 'empty' in the sense that every block will - * contain a single record with e_clusters == 0. + * contain a single record with cluster count == 0. */ static int ocfs2_add_branch(struct ocfs2_super *osb, handle_t *handle, @@ -268,6 +472,7 @@ static int ocfs2_add_branch(struct ocfs2_super *osb, struct ocfs2_extent_block *eb; struct ocfs2_extent_list *eb_el; struct ocfs2_extent_list *el; + u32 new_cpos; mlog_entry_void(); @@ -302,6 +507,9 @@ static int ocfs2_add_branch(struct ocfs2_super *osb, goto bail; } + 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 * linked with the rest of the tree. * conversly, new_eb_bhs[0] is the new bottommost leaf. @@ -330,9 +538,18 @@ static int ocfs2_add_branch(struct ocfs2_super *osb, eb->h_next_leaf_blk = 0; eb_el->l_tree_depth = cpu_to_le16(i); eb_el->l_next_free_rec = cpu_to_le16(1); - eb_el->l_recs[0].e_cpos = fe->i_clusters; + /* + * This actually counts as an empty extent as + * c_clusters == 0 + */ + eb_el->l_recs[0].e_cpos = cpu_to_le32(new_cpos); eb_el->l_recs[0].e_blkno = cpu_to_le64(next_blkno); - eb_el->l_recs[0].e_clusters = cpu_to_le32(0); + /* + * eb_el isn't always an interior node, but even leaf + * nodes want a zero'd flags and reserved field so + * this gets the whole 32 bits regardless of use. + */ + eb_el->l_recs[0].e_int_clusters = cpu_to_le32(0); if (!eb_el->l_tree_depth) new_last_eb_blk = le64_to_cpu(eb->h_blkno); @@ -376,8 +593,8 @@ static int ocfs2_add_branch(struct ocfs2_super *osb, * either be on the fe, or the extent block passed in. */ i = le16_to_cpu(el->l_next_free_rec); el->l_recs[i].e_blkno = cpu_to_le64(next_blkno); - el->l_recs[i].e_cpos = fe->i_clusters; - el->l_recs[i].e_clusters = 0; + el->l_recs[i].e_cpos = cpu_to_le32(new_cpos); + el->l_recs[i].e_int_clusters = 0; le16_add_cpu(&el->l_next_free_rec, 1); /* fe needs a new last extent block pointer, as does the @@ -425,6 +642,7 @@ static int ocfs2_shift_tree_depth(struct ocfs2_super *osb, struct buffer_head **ret_new_eb_bh) { int status, i; + u32 new_clusters; struct buffer_head *new_eb_bh = NULL; struct ocfs2_dinode *fe; struct ocfs2_extent_block *eb; @@ -461,11 +679,8 @@ static int ocfs2_shift_tree_depth(struct ocfs2_super *osb, /* copy the fe data into the new extent block */ eb_el->l_tree_depth = fe_el->l_tree_depth; eb_el->l_next_free_rec = fe_el->l_next_free_rec; - for(i = 0; i < le16_to_cpu(fe_el->l_next_free_rec); i++) { - eb_el->l_recs[i].e_cpos = fe_el->l_recs[i].e_cpos; - eb_el->l_recs[i].e_clusters = fe_el->l_recs[i].e_clusters; - eb_el->l_recs[i].e_blkno = fe_el->l_recs[i].e_blkno; - } + for(i = 0; i < le16_to_cpu(fe_el->l_next_free_rec); i++) + eb_el->l_recs[i] = fe_el->l_recs[i]; status = ocfs2_journal_dirty(handle, new_eb_bh); if (status < 0) { @@ -480,16 +695,15 @@ static int ocfs2_shift_tree_depth(struct ocfs2_super *osb, goto bail; } + new_clusters = ocfs2_sum_rightmost_rec(eb_el); + /* update fe now */ le16_add_cpu(&fe_el->l_tree_depth, 1); fe_el->l_recs[0].e_cpos = 0; fe_el->l_recs[0].e_blkno = eb->h_blkno; - fe_el->l_recs[0].e_clusters = fe->i_clusters; - for(i = 1; i < le16_to_cpu(fe_el->l_next_free_rec); i++) { - fe_el->l_recs[i].e_cpos = 0; - fe_el->l_recs[i].e_clusters = 0; - fe_el->l_recs[i].e_blkno = 0; - } + fe_el->l_recs[0].e_int_clusters = cpu_to_le32(new_clusters); + for(i = 1; i < le16_to_cpu(fe_el->l_next_free_rec); i++) + memset(&fe_el->l_recs[i], 0, sizeof(struct ocfs2_extent_rec)); fe_el->l_next_free_rec = cpu_to_le16(1); /* If this is our 1st tree depth shift, then last_eb_blk @@ -515,199 +729,6 @@ bail: } /* - * Expects the tree to already have room in the rightmost leaf for the - * extent. Updates all the extent blocks (and the dinode) on the way - * down. - */ -static int ocfs2_do_insert_extent(struct ocfs2_super *osb, - handle_t *handle, - struct inode *inode, - struct buffer_head *fe_bh, - u64 start_blk, - u32 new_clusters) -{ - int status, i, num_bhs = 0; - u64 next_blkno; - u16 next_free; - struct buffer_head **eb_bhs = NULL; - struct ocfs2_dinode *fe; - struct ocfs2_extent_block *eb; - struct ocfs2_extent_list *el; - - mlog_entry_void(); - - status = ocfs2_journal_access(handle, inode, fe_bh, - OCFS2_JOURNAL_ACCESS_WRITE); - if (status < 0) { - mlog_errno(status); - goto bail; - } - - fe = (struct ocfs2_dinode *) fe_bh->b_data; - el = &fe->id2.i_list; - if (el->l_tree_depth) { - /* This is another operation where we want to be - * careful about our tree updates. An error here means - * none of the previous changes we made should roll - * forward. As a result, we have to record the buffers - * for this part of the tree in an array and reserve a - * journal write to them before making any changes. */ - num_bhs = le16_to_cpu(fe->id2.i_list.l_tree_depth); - eb_bhs = kcalloc(num_bhs, sizeof(struct buffer_head *), - GFP_KERNEL); - if (!eb_bhs) { - status = -ENOMEM; - mlog_errno(status); - goto bail; - } - - i = 0; - while(el->l_tree_depth) { - 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); - status = -EIO; - goto bail; - } - next_blkno = le64_to_cpu(el->l_recs[next_free - 1].e_blkno); - - BUG_ON(i >= num_bhs); - status = ocfs2_read_block(osb, next_blkno, &eb_bhs[i], - OCFS2_BH_CACHED, inode); - if (status < 0) { - mlog_errno(status); - goto bail; - } - eb = (struct ocfs2_extent_block *) eb_bhs[i]->b_data; - if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) { - OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, - eb); - status = -EIO; - goto bail; - } - - status = ocfs2_journal_access(handle, inode, eb_bhs[i], - OCFS2_JOURNAL_ACCESS_WRITE); - if (status < 0) { - mlog_errno(status); - goto bail; - } - - el = &eb->h_list; - i++; - /* When we leave this loop, eb_bhs[num_bhs - 1] will - * hold the bottom-most leaf extent block. */ - } - BUG_ON(el->l_tree_depth); - - el = &fe->id2.i_list; - /* If we have tree depth, then the fe update is - * trivial, and we want to switch el out for the - * bottom-most leaf in order to update it with the - * actual extent data below. */ - 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); - status = -EIO; - goto bail; - } - le32_add_cpu(&el->l_recs[next_free - 1].e_clusters, - new_clusters); - /* (num_bhs - 1) to avoid the leaf */ - for(i = 0; i < (num_bhs - 1); i++) { - eb = (struct ocfs2_extent_block *) eb_bhs[i]->b_data; - el = &eb->h_list; - - /* finally, make our actual change to the - * intermediate extent blocks. */ - next_free = le16_to_cpu(el->l_next_free_rec); - le32_add_cpu(&el->l_recs[next_free - 1].e_clusters, - new_clusters); - - status = ocfs2_journal_dirty(handle, eb_bhs[i]); - if (status < 0) - mlog_errno(status); - } - BUG_ON(i != (num_bhs - 1)); - /* note that the leaf block wasn't touched in - * the loop above */ - eb = (struct ocfs2_extent_block *) eb_bhs[num_bhs - 1]->b_data; - el = &eb->h_list; - BUG_ON(el->l_tree_depth); - } - - /* yay, we can finally add the actual extent now! */ - i = le16_to_cpu(el->l_next_free_rec) - 1; - if (le16_to_cpu(el->l_next_free_rec) && - ocfs2_extent_contig(inode, &el->l_recs[i], start_blk)) { - le32_add_cpu(&el->l_recs[i].e_clusters, new_clusters); - } else if (le16_to_cpu(el->l_next_free_rec) && - (le32_to_cpu(el->l_recs[i].e_clusters) == 0)) { - /* having an empty extent at eof is legal. */ - if (el->l_recs[i].e_cpos != fe->i_clusters) { - ocfs2_error(inode->i_sb, - "Dinode %llu trailing extent is bad: " - "cpos (%u) != number of clusters (%u)", - (unsigned long long)OCFS2_I(inode)->ip_blkno, - le32_to_cpu(el->l_recs[i].e_cpos), - le32_to_cpu(fe->i_clusters)); - status = -EIO; - goto bail; - } - el->l_recs[i].e_blkno = cpu_to_le64(start_blk); - el->l_recs[i].e_clusters = cpu_to_le32(new_clusters); - } else { - /* No contiguous record, or no empty record at eof, so - * we add a new one. */ - - BUG_ON(le16_to_cpu(el->l_next_free_rec) >= - le16_to_cpu(el->l_count)); - i = le16_to_cpu(el->l_next_free_rec); - - el->l_recs[i].e_blkno = cpu_to_le64(start_blk); - el->l_recs[i].e_clusters = cpu_to_le32(new_clusters); - el->l_recs[i].e_cpos = fe->i_clusters; - le16_add_cpu(&el->l_next_free_rec, 1); - } - - /* - * extent_map errors are not fatal, so they are ignored outside - * of flushing the thing. - */ - status = ocfs2_extent_map_append(inode, &el->l_recs[i], - new_clusters); - if (status) { - mlog_errno(status); - ocfs2_extent_map_drop(inode, le32_to_cpu(fe->i_clusters)); - } - - status = ocfs2_journal_dirty(handle, fe_bh); - if (status < 0) - mlog_errno(status); - if (fe->id2.i_list.l_tree_depth) { - status = ocfs2_journal_dirty(handle, eb_bhs[num_bhs - 1]); - if (status < 0) - mlog_errno(status); - } - - status = 0; -bail: - if (eb_bhs) { - for (i = 0; i < num_bhs; i++) - if (eb_bhs[i]) - brelse(eb_bhs[i]); - kfree(eb_bhs); - } - - mlog_exit(status); - return status; -} - -/* * Should only be called when there is no space left in any of the * leaf nodes. What we want to do is find the lowest tree depth * non-leaf extent block with room for new records. There are three @@ -807,53 +828,1548 @@ bail: return status; } -/* the caller needs to update fe->i_clusters */ -int ocfs2_insert_extent(struct ocfs2_super *osb, - handle_t *handle, - struct inode *inode, - struct buffer_head *fe_bh, - u64 start_blk, - u32 new_clusters, - struct ocfs2_alloc_context *meta_ac) +/* + * This is only valid for leaf nodes, which are the only ones that can + * have empty extents anyway. + */ +static inline int ocfs2_is_empty_extent(struct ocfs2_extent_rec *rec) { - int status, i, shift; - struct buffer_head *last_eb_bh = NULL; + return !rec->e_leaf_clusters; +} + +/* + * This function will discard the rightmost extent record. + */ +static void ocfs2_shift_records_right(struct ocfs2_extent_list *el) +{ + int next_free = le16_to_cpu(el->l_next_free_rec); + int count = le16_to_cpu(el->l_count); + unsigned int num_bytes; + + BUG_ON(!next_free); + /* This will cause us to go off the end of our extent list. */ + BUG_ON(next_free >= count); + + num_bytes = sizeof(struct ocfs2_extent_rec) * next_free; + + memmove(&el->l_recs[1], &el->l_recs[0], num_bytes); +} + +static void ocfs2_rotate_leaf(struct ocfs2_extent_list *el, + struct ocfs2_extent_rec *insert_rec) +{ + int i, insert_index, next_free, has_empty, num_bytes; + u32 insert_cpos = le32_to_cpu(insert_rec->e_cpos); + struct ocfs2_extent_rec *rec; + + next_free = le16_to_cpu(el->l_next_free_rec); + has_empty = ocfs2_is_empty_extent(&el->l_recs[0]); + + BUG_ON(!next_free); + + /* The tree code before us didn't allow enough room in the leaf. */ + if (el->l_next_free_rec == el->l_count && !has_empty) + BUG(); + + /* + * The easiest way to approach this is to just remove the + * empty extent and temporarily decrement next_free. + */ + if (has_empty) { + /* + * If next_free was 1 (only an empty extent), this + * loop won't execute, which is fine. We still want + * the decrement above to happen. + */ + for(i = 0; i < (next_free - 1); i++) + el->l_recs[i] = el->l_recs[i+1]; + + next_free--; + } + + /* + * Figure out what the new record index should be. + */ + for(i = 0; i < next_free; i++) { + rec = &el->l_recs[i]; + + if (insert_cpos < le32_to_cpu(rec->e_cpos)) + break; + } + insert_index = i; + + mlog(0, "ins %u: index %d, has_empty %d, next_free %d, count %d\n", + insert_cpos, insert_index, has_empty, next_free, le16_to_cpu(el->l_count)); + + BUG_ON(insert_index < 0); + BUG_ON(insert_index >= le16_to_cpu(el->l_count)); + BUG_ON(insert_index > next_free); + + /* + * No need to memmove if we're just adding to the tail. + */ + if (insert_index != next_free) { + BUG_ON(next_free >= le16_to_cpu(el->l_count)); + + num_bytes = next_free - insert_index; + num_bytes *= sizeof(struct ocfs2_extent_rec); + memmove(&el->l_recs[insert_index + 1], + &el->l_recs[insert_index], + num_bytes); + } + + /* + * Either we had an empty extent, and need to re-increment or + * there was no empty extent on a non full rightmost leaf node, + * in which case we still need to increment. + */ + next_free++; + el->l_next_free_rec = cpu_to_le16(next_free); + /* + * Make sure none of the math above just messed up our tree. + */ + BUG_ON(le16_to_cpu(el->l_next_free_rec) > le16_to_cpu(el->l_count)); + + el->l_recs[insert_index] = *insert_rec; + +} + +/* + * Create an empty extent record . + * + * l_next_free_rec may be updated. + * + * If an empty extent already exists do nothing. + */ +static void ocfs2_create_empty_extent(struct ocfs2_extent_list *el) +{ + int next_free = le16_to_cpu(el->l_next_free_rec); + + BUG_ON(le16_to_cpu(el->l_tree_depth) != 0); + + if (next_free == 0) + goto set_and_inc; + + if (ocfs2_is_empty_extent(&el->l_recs[0])) + return; + + mlog_bug_on_msg(el->l_count == el->l_next_free_rec, + "Asked to create an empty extent in a full list:\n" + "count = %u, tree depth = %u", + le16_to_cpu(el->l_count), + le16_to_cpu(el->l_tree_depth)); + + ocfs2_shift_records_right(el); + +set_and_inc: + le16_add_cpu(&el->l_next_free_rec, 1); + memset(&el->l_recs[0], 0, sizeof(struct ocfs2_extent_rec)); +} + +/* + * For a rotation which involves two leaf nodes, the "root node" is + * the lowest level tree node which contains a path to both leafs. This + * resulting set of information can be used to form a complete "subtree" + * + * This function is passed two full paths from the dinode down to a + * pair of adjacent leaves. It's task is to figure out which path + * index contains the subtree root - this can be the root index itself + * in a worst-case rotation. + * + * The array index of the subtree root is passed back. + */ +static int ocfs2_find_subtree_root(struct inode *inode, + struct ocfs2_path *left, + struct ocfs2_path *right) +{ + int i = 0; + + /* + * Check that the caller passed in two paths from the same tree. + */ + BUG_ON(path_root_bh(left) != path_root_bh(right)); + + do { + i++; + + /* + * The caller didn't pass two adjacent paths. + */ + mlog_bug_on_msg(i > left->p_tree_depth, + "Inode %lu, left depth %u, right depth %u\n" + "left leaf blk %llu, right leaf blk %llu\n", + inode->i_ino, left->p_tree_depth, + right->p_tree_depth, + (unsigned long long)path_leaf_bh(left)->b_blocknr, + (unsigned long long)path_leaf_bh(right)->b_blocknr); + } while (left->p_node[i].bh->b_blocknr == + right->p_node[i].bh->b_blocknr); + + return i - 1; +} + +typedef void (path_insert_t)(void *, struct buffer_head *); + +/* + * Traverse a btree path in search of cpos, starting at root_el. + * + * This code can be called with a cpos larger than the tree, in which + * case it will return the rightmost path. + */ +static int __ocfs2_find_path(struct inode *inode, + struct ocfs2_extent_list *root_el, u32 cpos, + path_insert_t *func, void *data) +{ + int i, ret = 0; + u32 range; + u64 blkno; struct buffer_head *bh = NULL; - struct ocfs2_dinode *fe; struct ocfs2_extent_block *eb; - struct ocfs2_extent_list *el; + struct ocfs2_extent_list *el; + struct ocfs2_extent_rec *rec; + struct ocfs2_inode_info *oi = OCFS2_I(inode); - mlog_entry_void(); + el = root_el; + while (el->l_tree_depth) { + if (le16_to_cpu(el->l_next_free_rec) == 0) { + ocfs2_error(inode->i_sb, + "Inode %llu has empty extent list at " + "depth %u\n", + (unsigned long long)oi->ip_blkno, + le16_to_cpu(el->l_tree_depth)); + ret = -EROFS; + goto out; - mlog(0, "add %u clusters starting at block %llu to inode %llu\n", - new_clusters, (unsigned long long)start_blk, - (unsigned long long)OCFS2_I(inode)->ip_blkno); + } - fe = (struct ocfs2_dinode *) fe_bh->b_data; - el = &fe->id2.i_list; + for(i = 0; i < le16_to_cpu(el->l_next_free_rec) - 1; i++) { + rec = &el->l_recs[i]; + + /* + * In the case that cpos is off the allocation + * tree, this should just wind up returning the + * rightmost record. + */ + range = le32_to_cpu(rec->e_cpos) + + ocfs2_rec_clusters(el, rec); + if (cpos >= le32_to_cpu(rec->e_cpos) && cpos < range) + break; + } - if (el->l_tree_depth) { - /* jump to end of tree */ - status = ocfs2_read_block(osb, le64_to_cpu(fe->i_last_eb_blk), - &last_eb_bh, OCFS2_BH_CACHED, inode); - if (status < 0) { - mlog_exit(status); - goto bail; + blkno = le64_to_cpu(el->l_recs[i].e_blkno); + if (blkno == 0) { + ocfs2_error(inode->i_sb, + "Inode %llu has bad blkno in extent list " + "at depth %u (index %d)\n", + (unsigned long long)oi->ip_blkno, + le16_to_cpu(el->l_tree_depth), i); + ret = -EROFS; + goto out; } - eb = (struct ocfs2_extent_block *) last_eb_bh->b_data; + + brelse(bh); + bh = NULL; + ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), blkno, + &bh, OCFS2_BH_CACHED, inode); + if (ret) { + mlog_errno(ret); + goto out; + } + + eb = (struct ocfs2_extent_block *) bh->b_data; el = &eb->h_list; + if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) { + OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, eb); + ret = -EIO; + goto out; + } + + if (le16_to_cpu(el->l_next_free_rec) > + le16_to_cpu(el->l_count)) { + ocfs2_error(inode->i_sb, + "Inode %llu has bad count in extent list " + "at block %llu (next free=%u, count=%u)\n", + (unsigned long long)oi->ip_blkno, + (unsigned long long)bh->b_blocknr, + le16_to_cpu(el->l_next_free_rec), + le16_to_cpu(el->l_count)); + ret = -EROFS; + goto out; + } + + if (func) + func(data, bh); + } + +out: + /* + * Catch any trailing bh that the loop didn't handle. + */ + brelse(bh); + + return ret; +} + +/* + * Given an initialized path (that is, it has a valid root extent + * list), this function will traverse the btree in search of the path + * which would contain cpos. + * + * The path traveled is recorded in the path structure. + * + * Note that this will not do any comparisons on leaf node extent + * records, so it will work fine in the case that we just added a tree + * branch. + */ +struct find_path_data { + int index; + struct ocfs2_path *path; +}; +static void find_path_ins(void *data, struct buffer_head *bh) +{ + struct find_path_data *fp = data; + + get_bh(bh); + ocfs2_path_insert_eb(fp->path, fp->index, bh); + fp->index++; +} +static int ocfs2_find_path(struct inode *inode, struct ocfs2_path *path, + u32 cpos) +{ + struct find_path_data data; + + data.index = 1; + data.path = path; + return __ocfs2_find_path(inode, path_root_el(path), cpos, + find_path_ins, &data); +} + +static void find_leaf_ins(void *data, struct buffer_head *bh) +{ + struct ocfs2_extent_block *eb =(struct ocfs2_extent_block *)bh->b_data; + struct ocfs2_extent_list *el = &eb->h_list; + struct buffer_head **ret = data; + + /* We want to retain only the leaf block. */ + if (le16_to_cpu(el->l_tree_depth) == 0) { + get_bh(bh); + *ret = bh; + } +} +/* + * Find the leaf block in the tree which would contain cpos. No + * checking of the actual leaf is done. + * + * Some paths want to call this instead of allocating a path structure + * and calling ocfs2_find_path(). + * + * This function doesn't handle non btree extent lists. + */ +int ocfs2_find_leaf(struct inode *inode, struct ocfs2_extent_list *root_el, + u32 cpos, struct buffer_head **leaf_bh) +{ + int ret; + struct buffer_head *bh = NULL; + + ret = __ocfs2_find_path(inode, root_el, cpos, find_leaf_ins, &bh); + if (ret) { + mlog_errno(ret); + goto out; + } + + *leaf_bh = bh; +out: + return ret; +} + +/* + * Adjust the adjacent records (left_rec, right_rec) involved in a rotation. + * + * Basically, we've moved stuff around at the bottom of the tree and + * we need to fix up the extent records above the changes to reflect + * the new changes. + * + * left_rec: the record on the left. + * left_child_el: is the child list pointed to by left_rec + * right_rec: the record to the right of left_rec + * right_child_el: is the child list pointed to by right_rec + * + * By definition, this only works on interior nodes. + */ +static void ocfs2_adjust_adjacent_records(struct ocfs2_extent_rec *left_rec, + struct ocfs2_extent_list *left_child_el, + struct ocfs2_extent_rec *right_rec, + struct ocfs2_extent_list *right_child_el) +{ + u32 left_clusters, right_end; + + /* + * Interior nodes never have holes. Their cpos is the cpos of + * the leftmost record in their child list. Their cluster + * count covers the full theoretical range of their child list + * - the range between their cpos and the cpos of the record + * immediately to their right. + */ + left_clusters = le32_to_cpu(right_child_el->l_recs[0].e_cpos); + left_clusters -= le32_to_cpu(left_rec->e_cpos); + left_rec->e_int_clusters = cpu_to_le32(left_clusters); + + /* + * Calculate the rightmost cluster count boundary before + * moving cpos - we will need to adjust clusters after + * updating e_cpos to keep the same highest cluster count. + */ + right_end = le32_to_cpu(right_rec->e_cpos); + right_end += le32_to_cpu(right_rec->e_int_clusters); + + right_rec->e_cpos = left_rec->e_cpos; + le32_add_cpu(&right_rec->e_cpos, left_clusters); + + right_end -= le32_to_cpu(right_rec->e_cpos); + right_rec->e_int_clusters = cpu_to_le32(right_end); +} + +/* + * Adjust the adjacent root node records involved in a + * rotation. left_el_blkno is passed in as a key so that we can easily + * find it's index in the root list. + */ +static void ocfs2_adjust_root_records(struct ocfs2_extent_list *root_el, + struct ocfs2_extent_list *left_el, + struct ocfs2_extent_list *right_el, + u64 left_el_blkno) +{ + int i; + + BUG_ON(le16_to_cpu(root_el->l_tree_depth) <= + le16_to_cpu(left_el->l_tree_depth)); + + for(i = 0; i < le16_to_cpu(root_el->l_next_free_rec) - 1; i++) { + if (le64_to_cpu(root_el->l_recs[i].e_blkno) == left_el_blkno) + break; + } + + /* + * The path walking code should have never returned a root and + * two paths which are not adjacent. + */ + BUG_ON(i >= (le16_to_cpu(root_el->l_next_free_rec) - 1)); + + ocfs2_adjust_adjacent_records(&root_el->l_recs[i], left_el, + &root_el->l_recs[i + 1], right_el); +} + +/* + * We've changed a leaf block (in right_path) and need to reflect that + * change back up the subtree. + * + * This happens in multiple places: + * - When we've moved an extent record from the left path leaf to the right + * path leaf to make room for an empty extent in the left path leaf. + * - When our insert into the right path leaf is at the leftmost edge + * and requires an update of the path immediately to it's left. This + * can occur at the end of some types of rotation and appending inserts. + */ +static void ocfs2_complete_edge_insert(struct inode *inode, handle_t *handle, + struct ocfs2_path *left_path, + struct ocfs2_path *right_path, + int subtree_index) +{ + int ret, i, idx; + struct ocfs2_extent_list *el, *left_el, *right_el; + struct ocfs2_extent_rec *left_rec, *right_rec; + struct buffer_head *root_bh = left_path->p_node[subtree_index].bh; + + /* + * Update the counts and position values within all the + * interior nodes to reflect the leaf rotation we just did. + * + * The root node is handled below the loop. + * + * We begin the loop with right_el and left_el pointing to the + * leaf lists and work our way up. + * + * NOTE: within this loop, left_el and right_el always refer + * to the *child* lists. + */ + left_el = path_leaf_el(left_path); + right_el = path_leaf_el(right_path); + for(i = left_path->p_tree_depth - 1; i > subtree_index; i--) { + mlog(0, "Adjust records at index %u\n", i); + + /* + * One nice property of knowing that all of these + * nodes are below the root is that we only deal with + * the leftmost right node record and the rightmost + * left node record. + */ + el = left_path->p_node[i].el; + idx = le16_to_cpu(left_el->l_next_free_rec) - 1; + left_rec = &el->l_recs[idx]; + + el = right_path->p_node[i].el; + right_rec = &el->l_recs[0]; + + ocfs2_adjust_adjacent_records(left_rec, left_el, right_rec, + right_el); + + ret = ocfs2_journal_dirty(handle, left_path->p_node[i].bh); + if (ret) + mlog_errno(ret); + + ret = ocfs2_journal_dirty(handle, right_path->p_node[i].bh); + if (ret) + mlog_errno(ret); + + /* + * Setup our list pointers now so that the current + * parents become children in the next iteration. + */ + left_el = left_path->p_node[i].el; + right_el = right_path->p_node[i].el; + } + + /* + * At the root node, adjust the two adjacent records which + * begin our path to the leaves. + */ + + el = left_path->p_node[subtree_index].el; + left_el = left_path->p_node[subtree_index + 1].el; + right_el = right_path->p_node[subtree_index + 1].el; + + ocfs2_adjust_root_records(el, left_el, right_el, + left_path->p_node[subtree_index + 1].bh->b_blocknr); + + root_bh = left_path->p_node[subtree_index].bh; + + ret = ocfs2_journal_dirty(handle, root_bh); + if (ret) + mlog_errno(ret); +} + +static int ocfs2_rotate_subtree_right(struct inode *inode, + handle_t *handle, + struct ocfs2_path *left_path, + struct ocfs2_path *right_path, + int subtree_index) +{ + int ret, i; + struct buffer_head *right_leaf_bh; + struct buffer_head *left_leaf_bh = NULL; + struct buffer_head *root_bh; + struct ocfs2_extent_list *right_el, *left_el; + struct ocfs2_extent_rec move_rec; + + left_leaf_bh = path_leaf_bh(left_path); + left_el = path_leaf_el(left_path); + + if (left_el->l_next_free_rec != left_el->l_count) { + ocfs2_error(inode->i_sb, + "Inode %llu has non-full interior leaf node %llu" + "(next free = %u)", + (unsigned long long)OCFS2_I(inode)->ip_blkno, + (unsigned long long)left_leaf_bh->b_blocknr, + le16_to_cpu(left_el->l_next_free_rec)); + return -EROFS; + } + + /* + * This extent block may already have an empty record, so we + * return early if so. + */ + if (ocfs2_is_empty_extent(&left_el->l_recs[0])) + return 0; + + root_bh = left_path->p_node[subtree_index].bh; + BUG_ON(root_bh != right_path->p_node[subtree_index].bh); + + 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; + } + } + + right_leaf_bh = path_leaf_bh(right_path); + right_el = path_leaf_el(right_path); + + /* This is a code error, not a disk corruption. */ + mlog_bug_on_msg(!right_el->l_next_free_rec, "Inode %llu: Rotate fails " + "because rightmost leaf block %llu is empty\n", + (unsigned long long)OCFS2_I(inode)->ip_blkno, + (unsigned long long)right_leaf_bh->b_blocknr); + + ocfs2_create_empty_extent(right_el); + + ret = ocfs2_journal_dirty(handle, right_leaf_bh); + if (ret) { + mlog_errno(ret); + goto out; + } + + /* Do the copy now. */ + i = le16_to_cpu(left_el->l_next_free_rec) - 1; + move_rec = left_el->l_recs[i]; + right_el->l_recs[0] = move_rec; + + /* + * Clear out the record we just copied and shift everything + * over, leaving an empty extent in the left leaf. + * + * We temporarily subtract from next_free_rec so that the + * shift will lose the tail record (which is now defunct). + */ + le16_add_cpu(&left_el->l_next_free_rec, -1); + ocfs2_shift_records_right(left_el); + memset(&left_el->l_recs[0], 0, sizeof(struct ocfs2_extent_rec)); + le16_add_cpu(&left_el->l_next_free_rec, 1); + + ret = ocfs2_journal_dirty(handle, left_leaf_bh); + if (ret) { + mlog_errno(ret); + goto out; + } + + 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 left of the current one. + * + * Will return zero if the path passed in is already the leftmost path. + */ +static int ocfs2_find_cpos_for_left_leaf(struct super_block *sb, + struct ocfs2_path *path, u32 *cpos) +{ + int i, j, ret = 0; + u64 blkno; + struct ocfs2_extent_list *el; + + BUG_ON(path->p_tree_depth == 0); + + *cpos = 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) { + el = path->p_node[i].el; + + /* + * Find the extent record just before the one in our + * path. + */ + 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 == 0) { + if (i == 0) { + /* + * We've determined that the + * path specified is already + * the leftmost one - return a + * cpos of zero. + */ + goto out; + } + /* + * The leftmost 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); + *cpos = *cpos + ocfs2_rec_clusters(el, + &el->l_recs[j - 1]); + *cpos = *cpos - 1; + 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_extend_rotate_transaction(handle_t *handle, int subtree_depth, + struct ocfs2_path *path) +{ + int credits = (path->p_tree_depth - subtree_depth) * 2 + 1; + + if (handle->h_buffer_credits < credits) + return ocfs2_extend_trans(handle, credits); + + return 0; +} + +/* + * Trap the case where we're inserting into the theoretical range past + * the _actual_ left leaf range. Otherwise, we'll rotate a record + * whose cpos is less than ours into the right leaf. + * + * It's only necessary to look at the rightmost record of the left + * leaf because the logic that calls us should ensure that the + * theoretical ranges in the path components above the leaves are + * correct. + */ +static int ocfs2_rotate_requires_path_adjustment(struct ocfs2_path *left_path, + u32 insert_cpos) +{ + struct ocfs2_extent_list *left_el; + struct ocfs2_extent_rec *rec; + int next_free; + + left_el = path_leaf_el(left_path); + next_free = le16_to_cpu(left_el->l_next_free_rec); + rec = &left_el->l_recs[next_free - 1]; + + if (insert_cpos > le32_to_cpu(rec->e_cpos)) + return 1; + return 0; +} + +/* + * Rotate all the records in a btree right one record, starting at insert_cpos. + * + * The path to the rightmost leaf should be passed in. + * + * The array is assumed to be large enough to hold an entire path (tree depth). + * + * Upon succesful return from this function: + * + * - The 'right_path' array will contain a path to the leaf block + * whose range contains e_cpos. + * - That leaf block will have a single empty extent in list index 0. + * - In the case that the rotation requires a post-insert update, + * *ret_left_path will contain a valid path which can be passed to + * ocfs2_insert_path(). + */ +static int ocfs2_rotate_tree_right(struct inode *inode, + handle_t *handle, + u32 insert_cpos, + struct ocfs2_path *right_path, + struct ocfs2_path **ret_left_path) +{ + int ret, start; + u32 cpos; + struct ocfs2_path *left_path = NULL; + + *ret_left_path = NULL; + + left_path = ocfs2_new_path(path_root_bh(right_path), + path_root_el(right_path)); + if (!left_path) { + ret = -ENOMEM; + mlog_errno(ret); + goto out; + } + + ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, right_path, &cpos); + if (ret) { + mlog_errno(ret); + goto out; + } + + mlog(0, "Insert: %u, first left path cpos: %u\n", insert_cpos, cpos); + + /* + * What we want to do here is: + * + * 1) Start with the rightmost path. + * + * 2) Determine a path to the leaf block directly to the left + * of that leaf. + * + * 3) Determine the 'subtree root' - the lowest level tree node + * which contains a path to both leaves. + * + * 4) Rotate the subtree. + * + * 5) Find the next subtree by considering the left path to be + * the new right path. + * + * The check at the top of this while loop also accepts + * insert_cpos == cpos because cpos is only a _theoretical_ + * value to get us the left path - insert_cpos might very well + * be filling that hole. + * + * Stop at a cpos of '0' because we either started at the + * leftmost branch (i.e., a tree with one branch and a + * rotation inside of it), or we've gone as far as we can in + * rotating subtrees. + */ + while (cpos && insert_cpos <= cpos) { + mlog(0, "Rotating a tree: ins. cpos: %u, left path cpos: %u\n", + insert_cpos, cpos); + + ret = ocfs2_find_path(inode, left_path, cpos); + if (ret) { + mlog_errno(ret); + goto out; + } + + mlog_bug_on_msg(path_leaf_bh(left_path) == + path_leaf_bh(right_path), + "Inode %lu: error during insert of %u " + "(left path cpos %u) results in two identical " + "paths ending at %llu\n", + inode->i_ino, insert_cpos, cpos, + (unsigned long long) + path_leaf_bh(left_path)->b_blocknr); + + if (ocfs2_rotate_requires_path_adjustment(left_path, + insert_cpos)) { + mlog(0, "Path adjustment required\n"); + + /* + * We've rotated the tree as much as we + * should. The rest is up to + * ocfs2_insert_path() to complete, after the + * record insertion. We indicate this + * situation by returning the left path. + * + * The reason we don't adjust the records here + * before the record insert is that an error + * later might break the rule where a parent + * record e_cpos will reflect the actual + * e_cpos of the 1st nonempty record of the + * child list. + */ + *ret_left_path = left_path; + goto out_ret_path; + } + + start = ocfs2_find_subtree_root(inode, left_path, right_path); + + mlog(0, "Subtree root at index %d (blk %llu, depth %d)\n", + start, + (unsigned long long) right_path->p_node[start].bh->b_blocknr, + right_path->p_tree_depth); + + ret = ocfs2_extend_rotate_transaction(handle, start, + right_path); + if (ret) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_rotate_subtree_right(inode, handle, left_path, + right_path, start); + if (ret) { + mlog_errno(ret); + goto out; + } + + /* + * There is no need to re-read the next right path + * as we know that it'll be our current left + * path. Optimize by copying values instead. + */ + ocfs2_mv_path(right_path, left_path); + + ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, right_path, + &cpos); + if (ret) { + mlog_errno(ret); + goto out; + } + } + +out: + ocfs2_free_path(left_path); + +out_ret_path: + return ret; +} + +/* + * 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 + * that the tree above has been prepared. + */ +static void ocfs2_insert_at_leaf(struct ocfs2_extent_rec *insert_rec, + struct ocfs2_extent_list *el, + struct ocfs2_insert_type *insert, + struct inode *inode) +{ + int i = insert->ins_contig_index; + unsigned int range; + struct ocfs2_extent_rec *rec; + + BUG_ON(le16_to_cpu(el->l_tree_depth) != 0); + + /* + * Contiguous insert - either left or right. + */ + if (insert->ins_contig != CONTIG_NONE) { + rec = &el->l_recs[i]; + if (insert->ins_contig == CONTIG_LEFT) { + rec->e_blkno = insert_rec->e_blkno; + rec->e_cpos = insert_rec->e_cpos; + } + le16_add_cpu(&rec->e_leaf_clusters, + le16_to_cpu(insert_rec->e_leaf_clusters)); + return; + } + + /* + * Handle insert into an empty leaf. + */ + if (le16_to_cpu(el->l_next_free_rec) == 0 || + ((le16_to_cpu(el->l_next_free_rec) == 1) && + ocfs2_is_empty_extent(&el->l_recs[0]))) { + el->l_recs[0] = *insert_rec; + el->l_next_free_rec = cpu_to_le16(1); + return; + } + + /* + * Appending insert. + */ + if (insert->ins_appending == APPEND_TAIL) { + i = le16_to_cpu(el->l_next_free_rec) - 1; + rec = &el->l_recs[i]; + range = le32_to_cpu(rec->e_cpos) + + le16_to_cpu(rec->e_leaf_clusters); + BUG_ON(le32_to_cpu(insert_rec->e_cpos) < range); + + mlog_bug_on_msg(le16_to_cpu(el->l_next_free_rec) >= + le16_to_cpu(el->l_count), + "inode %lu, depth %u, count %u, next free %u, " + "rec.cpos %u, rec.clusters %u, " + "insert.cpos %u, insert.clusters %u\n", + inode->i_ino, + le16_to_cpu(el->l_tree_depth), + le16_to_cpu(el->l_count), + le16_to_cpu(el->l_next_free_rec), + le32_to_cpu(el->l_recs[i].e_cpos), + le16_to_cpu(el->l_recs[i].e_leaf_clusters), + le32_to_cpu(insert_rec->e_cpos), + le16_to_cpu(insert_rec->e_leaf_clusters)); + i++; + el->l_recs[i] = *insert_rec; + le16_add_cpu(&el->l_next_free_rec, 1); + return; + } + + /* + * Ok, we have to rotate. + * + * At this point, it is safe to assume that inserting into an + * empty leaf and appending to a leaf have both been handled + * above. + * + * This leaf needs to have space, either by the empty 1st + * extent record, or by virtue of an l_next_rec < l_count. + */ + ocfs2_rotate_leaf(el, insert_rec); +} + +static inline void ocfs2_update_dinode_clusters(struct inode *inode, + struct ocfs2_dinode *di, + u32 clusters) +{ + le32_add_cpu(&di->i_clusters, clusters); + spin_lock(&OCFS2_I(inode)->ip_lock); + OCFS2_I(inode)->ip_clusters = le32_to_cpu(di->i_clusters); + spin_unlock(&OCFS2_I(inode)->ip_lock); +} + +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; + struct ocfs2_extent_list *el; + struct ocfs2_path *left_path = NULL; + + *ret_left_path = NULL; + + /* + * This shouldn't happen for non-trees. The extent rec cluster + * count manipulation below only works for interior nodes. + */ + BUG_ON(right_path->p_tree_depth == 0); + + /* + * If our appending insert is at the leftmost edge of a leaf, + * then we might need to update the rightmost records of the + * neighboring path. + */ + el = path_leaf_el(right_path); + next_free = le16_to_cpu(el->l_next_free_rec); + if (next_free == 0 || + (next_free == 1 && ocfs2_is_empty_extent(&el->l_recs[0]))) { + u32 left_cpos; + + ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, right_path, + &left_cpos); + if (ret) { + mlog_errno(ret); + goto out; + } + + mlog(0, "Append may need a left path update. cpos: %u, " + "left_cpos: %u\n", le32_to_cpu(insert_rec->e_cpos), + left_cpos); + + /* + * No need to worry if the append is already in the + * leftmost leaf. + */ + if (left_cpos) { + left_path = ocfs2_new_path(path_root_bh(right_path), + path_root_el(right_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; + } + + /* + * ocfs2_insert_path() will pass the left_path to the + * journal for us. + */ + } + } + + ret = ocfs2_journal_access_path(inode, handle, right_path); + if (ret) { + mlog_errno(ret); + 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; + } + + *ret_left_path = left_path; + ret = 0; +out: + if (ret != 0) + ocfs2_free_path(left_path); + + return ret; +} + +/* + * This function only does inserts on an allocation b-tree. For dinode + * lists, ocfs2_insert_at_leaf() is called directly. + * + * right_path is the path we want to do the actual insert + * in. left_path should only be passed in if we need to update that + * portion of the tree after an edge insert. + */ +static int ocfs2_insert_path(struct inode *inode, + handle_t *handle, + struct ocfs2_path *left_path, + struct ocfs2_path *right_path, + struct ocfs2_extent_rec *insert_rec, + struct ocfs2_insert_type *insert) +{ + 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 + * will be touching all components anyway. + */ + ret = ocfs2_journal_access_path(inode, handle, right_path); + if (ret < 0) { + mlog_errno(ret); + goto out; + } + + if (left_path) { + int credits = handle->h_buffer_credits; + + /* + * There's a chance that left_path got passed back to + * us without being accounted for in the + * journal. Extend our transaction here to be sure we + * can change those blocks. + */ + credits += left_path->p_tree_depth; + + ret = ocfs2_extend_trans(handle, credits); + if (ret < 0) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_journal_access_path(inode, handle, left_path); + if (ret < 0) { + mlog_errno(ret); + goto out; + } + } + + el = path_leaf_el(right_path); + + ocfs2_insert_at_leaf(insert_rec, el, insert, inode); + ret = ocfs2_journal_dirty(handle, leaf_bh); + if (ret) + mlog_errno(ret); + + if (left_path) { + /* + * The rotate code has indicated that we need to fix + * up portions of the tree after the insert. + * + * XXX: Should we extend the transaction here? + */ + subtree_index = ocfs2_find_subtree_root(inode, left_path, + right_path); + ocfs2_complete_edge_insert(inode, handle, left_path, + right_path, subtree_index); + } + + ret = 0; +out: + return ret; +} + +static int ocfs2_do_insert_extent(struct inode *inode, + handle_t *handle, + struct buffer_head *di_bh, + struct ocfs2_extent_rec *insert_rec, + struct ocfs2_insert_type *type) +{ + int ret, rotate = 0; + u32 cpos; + struct ocfs2_path *right_path = NULL; + struct ocfs2_path *left_path = NULL; + struct ocfs2_dinode *di; + struct ocfs2_extent_list *el; + + di = (struct ocfs2_dinode *) di_bh->b_data; + el = &di->id2.i_list; + + ret = ocfs2_journal_access(handle, inode, di_bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out; + } + + if (le16_to_cpu(el->l_tree_depth) == 0) { + ocfs2_insert_at_leaf(insert_rec, el, type, inode); + goto out_update_clusters; + } + + right_path = ocfs2_new_inode_path(di_bh); + if (!right_path) { + ret = -ENOMEM; + mlog_errno(ret); + goto out; + } + + /* + * Determine the path to start with. Rotations need the + * rightmost path, everything else can go directly to the + * target leaf. + */ + cpos = le32_to_cpu(insert_rec->e_cpos); + if (type->ins_appending == APPEND_NONE && + type->ins_contig == CONTIG_NONE) { + rotate = 1; + cpos = UINT_MAX; + } + + ret = ocfs2_find_path(inode, right_path, cpos); + if (ret) { + mlog_errno(ret); + goto out; + } + + /* + * Rotations and appends need special treatment - they modify + * parts of the tree's above them. + * + * Both might pass back a path immediate to the left of the + * one being inserted to. This will be cause + * ocfs2_insert_path() to modify the rightmost records of + * left_path to account for an edge insert. + * + * XXX: When modifying this code, keep in mind that an insert + * can wind up skipping both of these two special cases... + */ + if (rotate) { + ret = ocfs2_rotate_tree_right(inode, handle, + le32_to_cpu(insert_rec->e_cpos), + right_path, &left_path); + if (ret) { + mlog_errno(ret); + goto out; + } + } else if (type->ins_appending == APPEND_TAIL + && type->ins_contig != CONTIG_LEFT) { + ret = ocfs2_append_rec_to_path(inode, handle, insert_rec, + right_path, &left_path); + if (ret) { + mlog_errno(ret); + goto out; + } + } + + ret = ocfs2_insert_path(inode, handle, left_path, right_path, + insert_rec, type); + if (ret) { + mlog_errno(ret); + goto out; + } + +out_update_clusters: + ocfs2_update_dinode_clusters(inode, di, + le16_to_cpu(insert_rec->e_leaf_clusters)); + + ret = ocfs2_journal_dirty(handle, di_bh); + if (ret) + mlog_errno(ret); + +out: + ocfs2_free_path(left_path); + ocfs2_free_path(right_path); + + return ret; +} + +static void ocfs2_figure_contig_type(struct inode *inode, + struct ocfs2_insert_type *insert, + struct ocfs2_extent_list *el, + struct ocfs2_extent_rec *insert_rec) +{ + int i; + enum ocfs2_contig_type contig_type = CONTIG_NONE; + + BUG_ON(le16_to_cpu(el->l_tree_depth) != 0); + + for(i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) { + contig_type = ocfs2_extent_contig(inode, &el->l_recs[i], + insert_rec); + if (contig_type != CONTIG_NONE) { + insert->ins_contig_index = i; + break; + } + } + insert->ins_contig = contig_type; +} + +/* + * This should only be called against the righmost leaf extent list. + * + * ocfs2_figure_appending_type() will figure out whether we'll have to + * insert at the tail of the rightmost leaf. + * + * This should also work against the dinode list for tree's with 0 + * depth. If we consider the dinode list to be the rightmost leaf node + * then the logic here makes sense. + */ +static void ocfs2_figure_appending_type(struct ocfs2_insert_type *insert, + struct ocfs2_extent_list *el, + struct ocfs2_extent_rec *insert_rec) +{ + int i; + u32 cpos = le32_to_cpu(insert_rec->e_cpos); + struct ocfs2_extent_rec *rec; + + insert->ins_appending = APPEND_NONE; + + BUG_ON(le16_to_cpu(el->l_tree_depth) != 0); + + if (!el->l_next_free_rec) + goto set_tail_append; + + if (ocfs2_is_empty_extent(&el->l_recs[0])) { + /* Were all records empty? */ + if (le16_to_cpu(el->l_next_free_rec) == 1) + goto set_tail_append; } - /* Can we allocate without adding/shifting tree bits? */ i = le16_to_cpu(el->l_next_free_rec) - 1; - if (le16_to_cpu(el->l_next_free_rec) == 0 - || (le16_to_cpu(el->l_next_free_rec) < le16_to_cpu(el->l_count)) - || le32_to_cpu(el->l_recs[i].e_clusters) == 0 - || ocfs2_extent_contig(inode, &el->l_recs[i], start_blk)) - goto out_add; + rec = &el->l_recs[i]; + + if (cpos >= + (le32_to_cpu(rec->e_cpos) + le16_to_cpu(rec->e_leaf_clusters))) + goto set_tail_append; + + return; + +set_tail_append: + insert->ins_appending = APPEND_TAIL; +} + +/* + * Helper function called at the begining of an insert. + * + * This computes a few things that are commonly used in the process of + * inserting into the btree: + * - Whether the new extent is contiguous with an existing one. + * - The current tree depth. + * - Whether the insert is an appending one. + * - The total # of free records in the tree. + * + * All of the information is stored on the ocfs2_insert_type + * structure. + */ +static int ocfs2_figure_insert_type(struct inode *inode, + struct buffer_head *di_bh, + struct buffer_head **last_eb_bh, + struct ocfs2_extent_rec *insert_rec, + struct ocfs2_insert_type *insert) +{ + int ret; + struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; + struct ocfs2_extent_block *eb; + struct ocfs2_extent_list *el; + struct ocfs2_path *path = NULL; + struct buffer_head *bh = NULL; + + el = &di->id2.i_list; + insert->ins_tree_depth = le16_to_cpu(el->l_tree_depth); + + if (el->l_tree_depth) { + /* + * If we have tree depth, we read in the + * rightmost extent block ahead of time as + * ocfs2_figure_insert_type() and ocfs2_add_branch() + * may want it later. + */ + ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), + le64_to_cpu(di->i_last_eb_blk), &bh, + OCFS2_BH_CACHED, inode); + if (ret) { + mlog_exit(ret); + goto out; + } + eb = (struct ocfs2_extent_block *) bh->b_data; + el = &eb->h_list; + } + + /* + * Unless we have a contiguous insert, we'll need to know if + * there is room left in our allocation tree for another + * extent record. + * + * XXX: This test is simplistic, we can search for empty + * extent records too. + */ + insert->ins_free_records = le16_to_cpu(el->l_count) - + le16_to_cpu(el->l_next_free_rec); + + if (!insert->ins_tree_depth) { + ocfs2_figure_contig_type(inode, insert, el, insert_rec); + ocfs2_figure_appending_type(insert, el, insert_rec); + return 0; + } + + path = ocfs2_new_inode_path(di_bh); + if (!path) { + ret = -ENOMEM; + mlog_errno(ret); + goto out; + } + + /* + * In the case that we're inserting past what the tree + * currently accounts for, ocfs2_find_path() will return for + * us the rightmost tree path. This is accounted for below in + * the appending code. + */ + ret = ocfs2_find_path(inode, path, le32_to_cpu(insert_rec->e_cpos)); + if (ret) { + mlog_errno(ret); + goto out; + } + + el = path_leaf_el(path); + + /* + * Now that we have the path, there's two things we want to determine: + * 1) Contiguousness (also set contig_index if this is so) + * + * 2) Are we doing an append? We can trivially break this up + * into two types of appends: simple record append, or a + * rotate inside the tail leaf. + */ + ocfs2_figure_contig_type(inode, insert, el, insert_rec); + + /* + * The insert code isn't quite ready to deal with all cases of + * left contiguousness. Specifically, if it's an insert into + * the 1st record in a leaf, it will require the adjustment of + * cluster count on the last record of the path directly to it's + * left. For now, just catch that case and fool the layers + * above us. This works just fine for tree_depth == 0, which + * is why we allow that above. + */ + if (insert->ins_contig == CONTIG_LEFT && + insert->ins_contig_index == 0) + insert->ins_contig = CONTIG_NONE; + + /* + * Ok, so we can simply compare against last_eb to figure out + * whether the path doesn't exist. This will only happen in + * the case that we're doing a tail append, so maybe we can + * take advantage of that information somehow. + */ + if (le64_to_cpu(di->i_last_eb_blk) == path_leaf_bh(path)->b_blocknr) { + /* + * Ok, ocfs2_find_path() returned us the rightmost + * tree path. This might be an appending insert. There are + * two cases: + * 1) We're doing a true append at the tail: + * -This might even be off the end of the leaf + * 2) We're "appending" by rotating in the tail + */ + ocfs2_figure_appending_type(insert, el, insert_rec); + } + +out: + ocfs2_free_path(path); + + if (ret == 0) + *last_eb_bh = bh; + else + brelse(bh); + return ret; +} + +/* + * Insert an extent into an inode btree. + * + * The caller needs to update fe->i_clusters + */ +int ocfs2_insert_extent(struct ocfs2_super *osb, + handle_t *handle, + struct inode *inode, + struct buffer_head *fe_bh, + u32 cpos, + u64 start_blk, + u32 new_clusters, + struct ocfs2_alloc_context *meta_ac) +{ + int status, shift; + struct buffer_head *last_eb_bh = NULL; + struct buffer_head *bh = NULL; + struct ocfs2_insert_type insert = {0, }; + struct ocfs2_extent_rec rec; + + mlog(0, "add %u clusters at position %u to inode %llu\n", + new_clusters, cpos, (unsigned long long)OCFS2_I(inode)->ip_blkno); + + mlog_bug_on_msg(!ocfs2_sparse_alloc(osb) && + (OCFS2_I(inode)->ip_clusters != cpos), + "Device %s, asking for sparse allocation: inode %llu, " + "cpos %u, clusters %u\n", + osb->dev_str, + (unsigned long long)OCFS2_I(inode)->ip_blkno, cpos, + OCFS2_I(inode)->ip_clusters); + + memset(&rec, 0, sizeof(rec)); + rec.e_cpos = cpu_to_le32(cpos); + rec.e_blkno = cpu_to_le64(start_blk); + rec.e_leaf_clusters = cpu_to_le16(new_clusters); + + status = ocfs2_figure_insert_type(inode, fe_bh, &last_eb_bh, &rec, + &insert); + if (status < 0) { + mlog_errno(status); + goto bail; + } - mlog(0, "ocfs2_allocate_extent: couldn't do a simple add, traversing " - "tree now.\n"); + mlog(0, "Insert.appending: %u, Insert.Contig: %u, " + "Insert.contig_index: %d, Insert.free_records: %d, " + "Insert.tree_depth: %d\n", + 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) { @@ -866,13 +2382,9 @@ int ocfs2_insert_extent(struct ocfs2_super *osb, * and didn't find room for any more extents - we need to add * another tree level */ if (shift) { - /* if we hit a leaf, we'd better be empty :) */ - BUG_ON(le16_to_cpu(el->l_next_free_rec) != - le16_to_cpu(el->l_count)); BUG_ON(bh); - mlog(0, "ocfs2_allocate_extent: need to shift tree depth " - "(current = %u)\n", - le16_to_cpu(fe->id2.i_list.l_tree_depth)); + 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 @@ -883,15 +2395,16 @@ int ocfs2_insert_extent(struct ocfs2_super *osb, mlog_errno(status); goto bail; } + insert.ins_tree_depth++; /* Special case: we have room now if we shifted from * tree_depth 0 */ - if (fe->id2.i_list.l_tree_depth == cpu_to_le16(1)) + 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, "ocfs2_allocate_extent: add branch. bh = %p\n", bh); + 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) { @@ -900,11 +2413,12 @@ int ocfs2_insert_extent(struct ocfs2_super *osb, } out_add: - /* Finally, we can add clusters. */ - status = ocfs2_do_insert_extent(osb, handle, inode, fe_bh, - start_blk, new_clusters); + /* 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) mlog_errno(status); + else + ocfs2_extent_map_insert_rec(inode, &rec); bail: if (bh) @@ -1447,168 +2961,389 @@ int ocfs2_truncate_log_init(struct ocfs2_super *osb) * 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 * as the dinodes i_last_eb_blk */ -static int ocfs2_find_new_last_ext_blk(struct ocfs2_super *osb, - struct inode *inode, - struct ocfs2_dinode *fe, - u32 new_i_clusters, - struct buffer_head *old_last_eb, +static int ocfs2_find_new_last_ext_blk(struct inode *inode, + unsigned int clusters_to_del, + struct ocfs2_path *path, struct buffer_head **new_last_eb) { - int i, status = 0; - u64 block = 0; + int next_free, ret = 0; + u32 cpos; + struct ocfs2_extent_rec *rec; struct ocfs2_extent_block *eb; struct ocfs2_extent_list *el; struct buffer_head *bh = NULL; *new_last_eb = NULL; - if (!OCFS2_IS_VALID_DINODE(fe)) { - OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe); - status = -EIO; - goto bail; - } - /* we have no tree, so of course, no last_eb. */ - if (!fe->id2.i_list.l_tree_depth) - goto bail; + if (!path->p_tree_depth) + goto out; /* trunc to zero special case - this makes tree_depth = 0 * regardless of what it is. */ - if (!new_i_clusters) - goto bail; + if (OCFS2_I(inode)->ip_clusters == clusters_to_del) + goto out; - eb = (struct ocfs2_extent_block *) old_last_eb->b_data; - el = &(eb->h_list); + el = path_leaf_el(path); BUG_ON(!el->l_next_free_rec); - /* Make sure that this guy will actually be empty after we - * clear away the data. */ - if (le32_to_cpu(el->l_recs[0].e_cpos) < new_i_clusters) - goto bail; + /* + * Make sure that this extent list will actually be empty + * after we clear away the data. We can shortcut out if + * there's more than one non-empty extent in the + * list. Otherwise, a check of the remaining extent is + * necessary. + */ + next_free = le16_to_cpu(el->l_next_free_rec); + rec = NULL; + if (ocfs2_is_empty_extent(&el->l_recs[0])) { + if (next_free > 2) + goto out; - /* Ok, at this point, we know that last_eb will definitely - * change, so lets traverse the tree and find the second to - * last extent block. */ - el = &(fe->id2.i_list); - /* go down the tree, */ - do { - for(i = (le16_to_cpu(el->l_next_free_rec) - 1); i >= 0; i--) { - if (le32_to_cpu(el->l_recs[i].e_cpos) < - new_i_clusters) { - block = le64_to_cpu(el->l_recs[i].e_blkno); - break; - } + /* We may have a valid extent in index 1, check it. */ + if (next_free == 2) + rec = &el->l_recs[1]; + + /* + * Fall through - no more nonempty extents, so we want + * to delete this leaf. + */ + } else { + if (next_free > 1) + goto out; + + rec = &el->l_recs[0]; + } + + if (rec) { + /* + * Check it we'll only be trimming off the end of this + * cluster. + */ + if (le16_to_cpu(rec->e_leaf_clusters) > clusters_to_del) + goto out; + } + + ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, path, &cpos); + if (ret) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_find_leaf(inode, path_root_el(path), cpos, &bh); + if (ret) { + mlog_errno(ret); + goto out; + } + + eb = (struct ocfs2_extent_block *) bh->b_data; + el = &eb->h_list; + if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) { + OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, eb); + ret = -EROFS; + goto out; + } + + *new_last_eb = bh; + get_bh(*new_last_eb); + mlog(0, "returning block %llu, (cpos: %u)\n", + (unsigned long long)le64_to_cpu(eb->h_blkno), cpos); +out: + brelse(bh); + + return ret; +} + +/* + * Trim some clusters off the rightmost edge of a tree. Only called + * during truncate. + * + * The caller needs to: + * - start journaling of each path component. + * - compute and fully set up any new last ext block + */ +static int ocfs2_trim_tree(struct inode *inode, struct ocfs2_path *path, + handle_t *handle, struct ocfs2_truncate_context *tc, + u32 clusters_to_del, u64 *delete_start) +{ + int ret, i, index = path->p_tree_depth; + u32 new_edge = 0; + u64 deleted_eb = 0; + struct buffer_head *bh; + struct ocfs2_extent_list *el; + struct ocfs2_extent_rec *rec; + + *delete_start = 0; + + while (index >= 0) { + bh = path->p_node[index].bh; + el = path->p_node[index].el; + + mlog(0, "traveling tree (index = %d, block = %llu)\n", + index, (unsigned long long)bh->b_blocknr); + + BUG_ON(le16_to_cpu(el->l_next_free_rec) == 0); + + if (index != + (path->p_tree_depth - le16_to_cpu(el->l_tree_depth))) { + ocfs2_error(inode->i_sb, + "Inode %lu has invalid ext. block %llu", + inode->i_ino, + (unsigned long long)bh->b_blocknr); + ret = -EROFS; + goto out; } - BUG_ON(i < 0); - if (bh) { - brelse(bh); - bh = NULL; +find_tail_record: + i = le16_to_cpu(el->l_next_free_rec) - 1; + rec = &el->l_recs[i]; + + mlog(0, "Extent list before: record %d: (%u, %u, %llu), " + "next = %u\n", i, le32_to_cpu(rec->e_cpos), + ocfs2_rec_clusters(el, rec), + (unsigned long long)le64_to_cpu(rec->e_blkno), + le16_to_cpu(el->l_next_free_rec)); + + BUG_ON(ocfs2_rec_clusters(el, rec) < clusters_to_del); + + if (le16_to_cpu(el->l_tree_depth) == 0) { + /* + * If the leaf block contains a single empty + * extent and no records, we can just remove + * the block. + */ + if (i == 0 && ocfs2_is_empty_extent(rec)) { + memset(rec, 0, + sizeof(struct ocfs2_extent_rec)); + el->l_next_free_rec = cpu_to_le16(0); + + goto delete; + } + + /* + * Remove any empty extents by shifting things + * left. That should make life much easier on + * the code below. This condition is rare + * enough that we shouldn't see a performance + * hit. + */ + if (ocfs2_is_empty_extent(&el->l_recs[0])) { + le16_add_cpu(&el->l_next_free_rec, -1); + + for(i = 0; + i < le16_to_cpu(el->l_next_free_rec); i++) + el->l_recs[i] = el->l_recs[i + 1]; + + memset(&el->l_recs[i], 0, + sizeof(struct ocfs2_extent_rec)); + + /* + * We've modified our extent list. The + * simplest way to handle this change + * is to being the search from the + * start again. + */ + goto find_tail_record; + } + + le16_add_cpu(&rec->e_leaf_clusters, -clusters_to_del); + + /* + * We'll use "new_edge" on our way back up the + * tree to know what our rightmost cpos is. + */ + new_edge = le16_to_cpu(rec->e_leaf_clusters); + new_edge += le32_to_cpu(rec->e_cpos); + + /* + * The caller will use this to delete data blocks. + */ + *delete_start = le64_to_cpu(rec->e_blkno) + + ocfs2_clusters_to_blocks(inode->i_sb, + le16_to_cpu(rec->e_leaf_clusters)); + + /* + * If it's now empty, remove this record. + */ + if (le16_to_cpu(rec->e_leaf_clusters) == 0) { + memset(rec, 0, + sizeof(struct ocfs2_extent_rec)); + le16_add_cpu(&el->l_next_free_rec, -1); + } + } else { + if (le64_to_cpu(rec->e_blkno) == deleted_eb) { + memset(rec, 0, + sizeof(struct ocfs2_extent_rec)); + le16_add_cpu(&el->l_next_free_rec, -1); + + goto delete; + } + + /* Can this actually happen? */ + if (le16_to_cpu(el->l_next_free_rec) == 0) + goto delete; + + /* + * We never actually deleted any clusters + * because our leaf was empty. There's no + * reason to adjust the rightmost edge then. + */ + if (new_edge == 0) + goto delete; + + rec->e_int_clusters = cpu_to_le32(new_edge); + le32_add_cpu(&rec->e_int_clusters, + -le32_to_cpu(rec->e_cpos)); + + /* + * A deleted child record should have been + * caught above. + */ + BUG_ON(le32_to_cpu(rec->e_int_clusters) == 0); } - status = ocfs2_read_block(osb, block, &bh, OCFS2_BH_CACHED, - inode); - if (status < 0) { - mlog_errno(status); - goto bail; +delete: + ret = ocfs2_journal_dirty(handle, bh); + if (ret) { + mlog_errno(ret); + goto out; } - eb = (struct ocfs2_extent_block *) bh->b_data; - el = &eb->h_list; - if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) { - OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, eb); - status = -EIO; - goto bail; + + mlog(0, "extent list container %llu, after: record %d: " + "(%u, %u, %llu), next = %u.\n", + (unsigned long long)bh->b_blocknr, i, + le32_to_cpu(rec->e_cpos), ocfs2_rec_clusters(el, rec), + (unsigned long long)le64_to_cpu(rec->e_blkno), + le16_to_cpu(el->l_next_free_rec)); + + /* + * We must be careful to only attempt delete of an + * extent block (and not the root inode block). + */ + if (index > 0 && le16_to_cpu(el->l_next_free_rec) == 0) { + struct ocfs2_extent_block *eb = + (struct ocfs2_extent_block *)bh->b_data; + + /* + * Save this for use when processing the + * parent block. + */ + deleted_eb = le64_to_cpu(eb->h_blkno); + + mlog(0, "deleting this extent block.\n"); + + ocfs2_remove_from_cache(inode, bh); + + BUG_ON(ocfs2_rec_clusters(el, &el->l_recs[0])); + 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); + } + } else { + deleted_eb = 0; } - } while (el->l_tree_depth); - *new_last_eb = bh; - get_bh(*new_last_eb); - mlog(0, "returning block %llu\n", - (unsigned long long)le64_to_cpu(eb->h_blkno)); -bail: - if (bh) - brelse(bh); + index--; + } - return status; + ret = 0; +out: + return ret; } static int ocfs2_do_truncate(struct ocfs2_super *osb, unsigned int clusters_to_del, struct inode *inode, struct buffer_head *fe_bh, - struct buffer_head *old_last_eb_bh, handle_t *handle, - struct ocfs2_truncate_context *tc) + struct ocfs2_truncate_context *tc, + struct ocfs2_path *path) { - int status, i, depth; + int status; struct ocfs2_dinode *fe; - struct ocfs2_extent_block *eb; struct ocfs2_extent_block *last_eb = NULL; struct ocfs2_extent_list *el; - struct buffer_head *eb_bh = NULL; struct buffer_head *last_eb_bh = NULL; - u64 next_eb = 0; u64 delete_blk = 0; fe = (struct ocfs2_dinode *) fe_bh->b_data; - status = ocfs2_find_new_last_ext_blk(osb, - inode, - fe, - le32_to_cpu(fe->i_clusters) - - clusters_to_del, - old_last_eb_bh, - &last_eb_bh); + status = ocfs2_find_new_last_ext_blk(inode, clusters_to_del, + path, &last_eb_bh); if (status < 0) { mlog_errno(status); goto bail; } - if (last_eb_bh) - last_eb = (struct ocfs2_extent_block *) last_eb_bh->b_data; - status = ocfs2_journal_access(handle, inode, fe_bh, - OCFS2_JOURNAL_ACCESS_WRITE); + /* + * Each component will be touched, so we might as well journal + * here to avoid having to handle errors later. + */ + status = ocfs2_journal_access_path(inode, handle, path); if (status < 0) { mlog_errno(status); goto bail; } + + if (last_eb_bh) { + status = ocfs2_journal_access(handle, inode, last_eb_bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (status < 0) { + mlog_errno(status); + goto bail; + } + + last_eb = (struct ocfs2_extent_block *) last_eb_bh->b_data; + } + el = &(fe->id2.i_list); + /* + * Lower levels depend on this never happening, but it's best + * to check it up here before changing the tree. + */ + if (el->l_tree_depth && el->l_recs[0].e_int_clusters == 0) { + ocfs2_error(inode->i_sb, + "Inode %lu has an empty extent record, depth %u\n", + inode->i_ino, le16_to_cpu(el->l_tree_depth)); + status = -EROFS; + goto bail; + } + spin_lock(&OCFS2_I(inode)->ip_lock); OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters) - clusters_to_del; spin_unlock(&OCFS2_I(inode)->ip_lock); le32_add_cpu(&fe->i_clusters, -clusters_to_del); - fe->i_mtime = cpu_to_le64(CURRENT_TIME.tv_sec); - fe->i_mtime_nsec = cpu_to_le32(CURRENT_TIME.tv_nsec); - - i = le16_to_cpu(el->l_next_free_rec) - 1; - - BUG_ON(le32_to_cpu(el->l_recs[i].e_clusters) < clusters_to_del); - le32_add_cpu(&el->l_recs[i].e_clusters, -clusters_to_del); - /* tree depth zero, we can just delete the clusters, otherwise - * we need to record the offset of the next level extent block - * as we may overwrite it. */ - if (!el->l_tree_depth) - delete_blk = le64_to_cpu(el->l_recs[i].e_blkno) - + ocfs2_clusters_to_blocks(osb->sb, - le32_to_cpu(el->l_recs[i].e_clusters)); - else - next_eb = le64_to_cpu(el->l_recs[i].e_blkno); - if (!el->l_recs[i].e_clusters) { - /* if we deleted the whole extent record, then clear - * out the other fields and update the extent - * list. For depth > 0 trees, we've already recorded - * the extent block in 'next_eb' */ - el->l_recs[i].e_cpos = 0; - el->l_recs[i].e_blkno = 0; - BUG_ON(!el->l_next_free_rec); - le16_add_cpu(&el->l_next_free_rec, -1); + status = ocfs2_trim_tree(inode, path, handle, tc, + clusters_to_del, &delete_blk); + if (status) { + mlog_errno(status); + goto bail; } - depth = le16_to_cpu(el->l_tree_depth); - if (!fe->i_clusters) { + if (le32_to_cpu(fe->i_clusters) == 0) { /* trunc to zero is a special case. */ el->l_tree_depth = 0; fe->i_last_eb_blk = 0; @@ -1625,12 +3360,6 @@ static int ocfs2_do_truncate(struct ocfs2_super *osb, /* If there will be a new last extent block, then by * definition, there cannot be any leaves to the right of * him. */ - status = ocfs2_journal_access(handle, inode, last_eb_bh, - OCFS2_JOURNAL_ACCESS_WRITE); - if (status < 0) { - mlog_errno(status); - goto bail; - } last_eb->h_next_leaf_blk = 0; status = ocfs2_journal_dirty(handle, last_eb_bh); if (status < 0) { @@ -1639,123 +3368,247 @@ static int ocfs2_do_truncate(struct ocfs2_super *osb, } } - /* if our tree depth > 0, update all the tree blocks below us. */ - while (depth) { - mlog(0, "traveling tree (depth = %d, next_eb = %llu)\n", - depth, (unsigned long long)next_eb); - status = ocfs2_read_block(osb, next_eb, &eb_bh, - OCFS2_BH_CACHED, inode); + if (delete_blk) { + status = ocfs2_truncate_log_append(osb, handle, delete_blk, + clusters_to_del); if (status < 0) { mlog_errno(status); goto bail; } - eb = (struct ocfs2_extent_block *)eb_bh->b_data; - if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) { - OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, eb); - status = -EIO; - goto bail; + } + status = 0; +bail: + + mlog_exit(status); + return status; +} + +static int ocfs2_writeback_zero_func(handle_t *handle, struct buffer_head *bh) +{ + set_buffer_uptodate(bh); + mark_buffer_dirty(bh); + return 0; +} + +static int ocfs2_ordered_zero_func(handle_t *handle, struct buffer_head *bh) +{ + set_buffer_uptodate(bh); + mark_buffer_dirty(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) +{ + int i, ret, partial = 0; + void *kaddr; + struct page *page; + unsigned int from, to = PAGE_CACHE_SIZE; + struct super_block *sb = inode->i_sb; + + BUG_ON(!ocfs2_sparse_alloc(OCFS2_SB(sb))); + + 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); + } + + for(i = 0; i < numpages; i++) { + page = pages[i]; + + BUG_ON(from > PAGE_CACHE_SIZE); + BUG_ON(to > PAGE_CACHE_SIZE); + + ret = ocfs2_map_page_blocks(page, &phys, inode, from, to, 0); + if (ret) + mlog_errno(ret); + + kaddr = kmap_atomic(page, KM_USER0); + memset(kaddr + from, 0, to - from); + kunmap_atomic(kaddr, KM_USER0); + + /* + * Need to set the buffers we zero'd into uptodate + * here if they aren't - ocfs2_map_page_blocks() + * might've skipped some + */ + if (ocfs2_should_order_data(inode)) { + ret = walk_page_buffers(handle, + page_buffers(page), + from, to, &partial, + ocfs2_ordered_zero_func); + if (ret < 0) + mlog_errno(ret); + } else { + ret = walk_page_buffers(handle, page_buffers(page), + from, to, &partial, + ocfs2_writeback_zero_func); + if (ret < 0) + mlog_errno(ret); } - el = &(eb->h_list); - status = ocfs2_journal_access(handle, inode, eb_bh, - OCFS2_JOURNAL_ACCESS_WRITE); - if (status < 0) { - mlog_errno(status); - goto bail; + if (!partial) + SetPageUptodate(page); + + flush_dcache_page(page); + + /* + * Every page after the 1st one should be completely zero'd. + */ + from = 0; + } +out: + if (pages) { + for (i = 0; i < numpages; i++) { + page = pages[i]; + unlock_page(page); + mark_page_accessed(page); + page_cache_release(page); } + } +} - BUG_ON(le16_to_cpu(el->l_next_free_rec) == 0); - BUG_ON(depth != (le16_to_cpu(el->l_tree_depth) + 1)); +static int ocfs2_grab_eof_pages(struct inode *inode, loff_t isize, 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; + + BUG_ON(!ocfs2_sparse_alloc(OCFS2_SB(sb))); + + /* Cluster boundary, so we don't need to grab any pages. */ + if ((isize & (csize - 1)) == 0) + goto out; - i = le16_to_cpu(el->l_next_free_rec) - 1; + ret = ocfs2_extent_map_get_blocks(inode, isize >> sb->s_blocksize_bits, + phys, NULL, &ext_flags); + if (ret) { + mlog_errno(ret); + goto out; + } - mlog(0, "extent block %llu, before: record %d: " - "(%u, %u, %llu), next = %u\n", - (unsigned long long)le64_to_cpu(eb->h_blkno), i, - le32_to_cpu(el->l_recs[i].e_cpos), - le32_to_cpu(el->l_recs[i].e_clusters), - (unsigned long long)le64_to_cpu(el->l_recs[i].e_blkno), - le16_to_cpu(el->l_next_free_rec)); + /* Tail is a hole. */ + if (*phys == 0) + goto out; - BUG_ON(le32_to_cpu(el->l_recs[i].e_clusters) < clusters_to_del); - le32_add_cpu(&el->l_recs[i].e_clusters, -clusters_to_del); - - next_eb = le64_to_cpu(el->l_recs[i].e_blkno); - /* bottom-most block requires us to delete data.*/ - if (!el->l_tree_depth) - delete_blk = le64_to_cpu(el->l_recs[i].e_blkno) - + ocfs2_clusters_to_blocks(osb->sb, - le32_to_cpu(el->l_recs[i].e_clusters)); - if (!el->l_recs[i].e_clusters) { - el->l_recs[i].e_cpos = 0; - el->l_recs[i].e_blkno = 0; - BUG_ON(!el->l_next_free_rec); - le16_add_cpu(&el->l_next_free_rec, -1); - } - mlog(0, "extent block %llu, after: record %d: " - "(%u, %u, %llu), next = %u\n", - (unsigned long long)le64_to_cpu(eb->h_blkno), i, - le32_to_cpu(el->l_recs[i].e_cpos), - le32_to_cpu(el->l_recs[i].e_clusters), - (unsigned long long)le64_to_cpu(el->l_recs[i].e_blkno), - le16_to_cpu(el->l_next_free_rec)); + /* Tail is marked as unwritten, we can count on write to zero + * in that case. */ + if (ext_flags & OCFS2_EXT_UNWRITTEN) + goto out; - status = ocfs2_journal_dirty(handle, eb_bh); - if (status < 0) { - mlog_errno(status); - goto bail; + next_cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, isize); + index = isize >> PAGE_CACHE_SHIFT; + do { + pages[numpages] = grab_cache_page(mapping, index); + if (!pages[numpages]) { + ret = -ENOMEM; + mlog_errno(ret); + goto out; } - if (!el->l_next_free_rec) { - mlog(0, "deleting this extent block.\n"); - - ocfs2_remove_from_cache(inode, eb_bh); + numpages++; + index++; + } while (index < (next_cluster_bytes >> PAGE_CACHE_SHIFT)); - BUG_ON(el->l_recs[0].e_clusters); - BUG_ON(el->l_recs[0].e_cpos); - BUG_ON(el->l_recs[0].e_blkno); - if (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. - */ - status = ocfs2_free_extent_block(handle, - tc->tc_ext_alloc_inode, - tc->tc_ext_alloc_bh, - eb); - if (status < 0) { - mlog_errno(status); - goto bail; +out: + if (ret != 0) { + if (pages) { + for (i = 0; i < numpages; i++) { + if (pages[i]) { + unlock_page(pages[i]); + page_cache_release(pages[i]); } } } - brelse(eb_bh); - eb_bh = NULL; - depth--; + numpages = 0; } - BUG_ON(!delete_blk); - status = ocfs2_truncate_log_append(osb, handle, delete_blk, - clusters_to_del); - if (status < 0) { - mlog_errno(status); - goto bail; + *num = numpages; + + return ret; +} + +/* + * Zero the area past i_size but still within an allocated + * cluster. This avoids exposing nonzero data on subsequent file + * extends. + * + * We need to call this before i_size is updated on the inode because + * 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 ret, numpages; + loff_t endbyte; + struct page **pages = NULL; + u64 phys; + + /* + * File systems which don't support sparse files zero on every + * extend. + */ + if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) + return 0; + + pages = kcalloc(ocfs2_pages_per_cluster(inode->i_sb), + sizeof(struct page *), GFP_NOFS); + if (pages == NULL) { + ret = -ENOMEM; + mlog_errno(ret); + goto out; } - status = 0; -bail: - if (!status) - ocfs2_extent_map_trunc(inode, le32_to_cpu(fe->i_clusters)); - else - ocfs2_extent_map_drop(inode, 0); - mlog_exit(status); - return status; + + ret = ocfs2_grab_eof_pages(inode, new_i_size, pages, &numpages, &phys); + if (ret) { + mlog_errno(ret); + goto out; + } + + if (numpages == 0) + goto out; + + ocfs2_zero_cluster_pages(inode, new_i_size, 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); + if (ret) + mlog_errno(ret); + +out: + if (pages) + kfree(pages); + + return ret; } /* @@ -1770,82 +3623,90 @@ int ocfs2_commit_truncate(struct ocfs2_super *osb, struct ocfs2_truncate_context *tc) { int status, i, credits, tl_sem = 0; - u32 clusters_to_del, target_i_clusters; - u64 last_eb = 0; - struct ocfs2_dinode *fe; - struct ocfs2_extent_block *eb; + u32 clusters_to_del, new_highest_cpos, range; struct ocfs2_extent_list *el; - struct buffer_head *last_eb_bh; handle_t *handle = NULL; struct inode *tl_inode = osb->osb_tl_inode; + struct ocfs2_path *path = NULL; mlog_entry_void(); down_write(&OCFS2_I(inode)->ip_alloc_sem); - target_i_clusters = ocfs2_clusters_for_bytes(osb->sb, + new_highest_cpos = ocfs2_clusters_for_bytes(osb->sb, i_size_read(inode)); - last_eb_bh = tc->tc_last_eb_bh; - tc->tc_last_eb_bh = NULL; + path = ocfs2_new_inode_path(fe_bh); + if (!path) { + status = -ENOMEM; + mlog_errno(status); + goto bail; + } - fe = (struct ocfs2_dinode *) fe_bh->b_data; + ocfs2_extent_map_trunc(inode, new_highest_cpos); - if (fe->id2.i_list.l_tree_depth) { - eb = (struct ocfs2_extent_block *) last_eb_bh->b_data; - el = &eb->h_list; - } else - el = &fe->id2.i_list; - last_eb = le64_to_cpu(fe->i_last_eb_blk); start: - mlog(0, "ocfs2_commit_truncate: fe->i_clusters = %u, " - "last_eb = %llu, fe->i_last_eb_blk = %llu, " - "fe->id2.i_list.l_tree_depth = %u last_eb_bh = %p\n", - le32_to_cpu(fe->i_clusters), (unsigned long long)last_eb, - (unsigned long long)le64_to_cpu(fe->i_last_eb_blk), - le16_to_cpu(fe->id2.i_list.l_tree_depth), last_eb_bh); - - if (last_eb != le64_to_cpu(fe->i_last_eb_blk)) { - mlog(0, "last_eb changed!\n"); - BUG_ON(!fe->id2.i_list.l_tree_depth); - last_eb = le64_to_cpu(fe->i_last_eb_blk); - /* i_last_eb_blk may have changed, read it if - * necessary. We don't have to worry about the - * truncate to zero case here (where there becomes no - * last_eb) because we never loop back after our work - * is done. */ - if (last_eb_bh) { - brelse(last_eb_bh); - last_eb_bh = NULL; - } + /* + * Check that we still have allocation to delete. + */ + if (OCFS2_I(inode)->ip_clusters == 0) { + status = 0; + goto bail; + } - status = ocfs2_read_block(osb, last_eb, - &last_eb_bh, OCFS2_BH_CACHED, - inode); - if (status < 0) { - mlog_errno(status); - goto bail; - } - 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); - status = -EIO; - goto bail; - } - el = &(eb->h_list); + /* + * Truncate always works against the rightmost tree branch. + */ + status = ocfs2_find_path(inode, path, UINT_MAX); + if (status) { + mlog_errno(status); + goto bail; + } + + mlog(0, "inode->ip_clusters = %u, tree_depth = %u\n", + OCFS2_I(inode)->ip_clusters, path->p_tree_depth); + + /* + * By now, el will point to the extent list on the bottom most + * portion of this tree. Only the tail record is considered in + * each pass. + * + * We handle the following cases, in order: + * - empty extent: delete the remaining branch + * - remove the entire record + * - remove a partial record + * - no record needs to be removed (truncate has completed) + */ + el = path_leaf_el(path); + if (le16_to_cpu(el->l_next_free_rec) == 0) { + ocfs2_error(inode->i_sb, + "Inode %llu has empty extent block at %llu\n", + (unsigned long long)OCFS2_I(inode)->ip_blkno, + (unsigned long long)path_leaf_bh(path)->b_blocknr); + status = -EROFS; + goto bail; } - /* by now, el will point to the extent list on the bottom most - * portion of this tree. */ i = le16_to_cpu(el->l_next_free_rec) - 1; - if (le32_to_cpu(el->l_recs[i].e_cpos) >= target_i_clusters) - clusters_to_del = le32_to_cpu(el->l_recs[i].e_clusters); - else - clusters_to_del = (le32_to_cpu(el->l_recs[i].e_clusters) + + range = le32_to_cpu(el->l_recs[i].e_cpos) + + ocfs2_rec_clusters(el, &el->l_recs[i]); + if (i == 0 && ocfs2_is_empty_extent(&el->l_recs[i])) { + clusters_to_del = 0; + } else if (le32_to_cpu(el->l_recs[i].e_cpos) >= new_highest_cpos) { + clusters_to_del = ocfs2_rec_clusters(el, &el->l_recs[i]); + } else if (range > new_highest_cpos) { + clusters_to_del = (ocfs2_rec_clusters(el, &el->l_recs[i]) + le32_to_cpu(el->l_recs[i].e_cpos)) - - target_i_clusters; + new_highest_cpos; + } else { + status = 0; + goto bail; + } - mlog(0, "clusters_to_del = %u in this pass\n", clusters_to_del); + mlog(0, "clusters_to_del = %u in this pass, tail blk=%llu\n", + clusters_to_del, (unsigned long long)path_leaf_bh(path)->b_blocknr); + + BUG_ON(clusters_to_del == 0); mutex_lock(&tl_inode->i_mutex); tl_sem = 1; @@ -1861,7 +3722,8 @@ start: } credits = ocfs2_calc_tree_trunc_credits(osb->sb, clusters_to_del, - fe, el); + (struct ocfs2_dinode *)fe_bh->b_data, + el); handle = ocfs2_start_trans(osb, credits); if (IS_ERR(handle)) { status = PTR_ERR(handle); @@ -1870,13 +3732,8 @@ start: goto bail; } - inode->i_ctime = inode->i_mtime = CURRENT_TIME; - status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); - if (status < 0) - mlog_errno(status); - - status = ocfs2_do_truncate(osb, clusters_to_del, inode, fe_bh, - last_eb_bh, handle, tc); + status = ocfs2_do_truncate(osb, clusters_to_del, inode, fe_bh, handle, + tc, path); if (status < 0) { mlog_errno(status); goto bail; @@ -1888,9 +3745,14 @@ start: ocfs2_commit_trans(osb, handle); handle = NULL; - BUG_ON(le32_to_cpu(fe->i_clusters) < target_i_clusters); - if (le32_to_cpu(fe->i_clusters) > target_i_clusters) - goto start; + ocfs2_reinit_path(path, 1); + + /* + * The check above will catch the case where we've truncated + * away all allocation. + */ + goto start; + bail: up_write(&OCFS2_I(inode)->ip_alloc_sem); @@ -1902,8 +3764,7 @@ bail: if (handle) ocfs2_commit_trans(osb, handle); - if (last_eb_bh) - brelse(last_eb_bh); + ocfs2_free_path(path); /* This will drop the ext_alloc cluster lock for us */ ocfs2_free_truncate_context(tc); @@ -1912,7 +3773,6 @@ bail: return status; } - /* * 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 @@ -1923,7 +3783,7 @@ int ocfs2_prepare_truncate(struct ocfs2_super *osb, struct buffer_head *fe_bh, struct ocfs2_truncate_context **tc) { - int status, metadata_delete; + int status, metadata_delete, i; unsigned int new_i_clusters; struct ocfs2_dinode *fe; struct ocfs2_extent_block *eb; @@ -1944,21 +3804,6 @@ int ocfs2_prepare_truncate(struct ocfs2_super *osb, "%llu\n", fe->i_clusters, new_i_clusters, (unsigned long long)fe->i_size); - if (le32_to_cpu(fe->i_clusters) <= new_i_clusters) { - ocfs2_error(inode->i_sb, "Dinode %llu has cluster count " - "%u and size %llu whereas struct inode has " - "cluster count %u and size %llu which caused an " - "invalid truncate to %u clusters.", - (unsigned long long)le64_to_cpu(fe->i_blkno), - le32_to_cpu(fe->i_clusters), - (unsigned long long)le64_to_cpu(fe->i_size), - OCFS2_I(inode)->ip_clusters, i_size_read(inode), - new_i_clusters); - mlog_meta_lvb(ML_ERROR, &OCFS2_I(inode)->ip_meta_lockres); - status = -EIO; - goto bail; - } - *tc = kzalloc(sizeof(struct ocfs2_truncate_context), GFP_KERNEL); if (!(*tc)) { status = -ENOMEM; @@ -1986,7 +3831,15 @@ int ocfs2_prepare_truncate(struct ocfs2_super *osb, goto bail; } el = &(eb->h_list); - if (le32_to_cpu(el->l_recs[0].e_cpos) >= new_i_clusters) + + 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; } diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h index 0b82e80..fbcb593 100644 --- a/fs/ocfs2/alloc.h +++ b/fs/ocfs2/alloc.h @@ -31,7 +31,8 @@ int ocfs2_insert_extent(struct ocfs2_super *osb, handle_t *handle, struct inode *inode, struct buffer_head *fe_bh, - u64 blkno, + u32 cpos, + u64 start_blk, u32 new_clusters, struct ocfs2_alloc_context *meta_ac); int ocfs2_num_free_extents(struct ocfs2_super *osb, @@ -70,6 +71,8 @@ struct ocfs2_truncate_context { 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_prepare_truncate(struct ocfs2_super *osb, struct inode *inode, struct buffer_head *fe_bh, @@ -79,4 +82,26 @@ int ocfs2_commit_truncate(struct ocfs2_super *osb, struct buffer_head *fe_bh, struct ocfs2_truncate_context *tc); +int ocfs2_find_leaf(struct inode *inode, struct ocfs2_extent_list *root_el, + u32 cpos, struct buffer_head **leaf_bh); + +/* + * Helper function to look at the # of clusters in an extent record. + */ +static inline unsigned int ocfs2_rec_clusters(struct ocfs2_extent_list *el, + struct ocfs2_extent_rec *rec) +{ + /* + * Cluster count in extent records is slightly different + * between interior nodes and leaf nodes. This is to support + * unwritten extents which need a flags field in leaf node + * records, thus shrinking the available space for a clusters + * field. + */ + if (el->l_tree_depth) + return le32_to_cpu(rec->e_int_clusters); + else + return le16_to_cpu(rec->e_leaf_clusters); +} + #endif /* OCFS2_ALLOC_H */ diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index 875c114..56963e6 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -24,6 +24,8 @@ #include <linux/highmem.h> #include <linux/pagemap.h> #include <asm/byteorder.h> +#include <linux/swap.h> +#include <linux/pipe_fs_i.h> #define MLOG_MASK_PREFIX ML_FILE_IO #include <cluster/masklog.h> @@ -37,6 +39,7 @@ #include "file.h" #include "inode.h" #include "journal.h" +#include "suballoc.h" #include "super.h" #include "symlink.h" @@ -134,7 +137,9 @@ static int ocfs2_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) { int err = 0; + unsigned int ext_flags; u64 p_blkno, past_eof; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); mlog_entry("(0x%p, %llu, 0x%p, %d)\n", inode, (unsigned long long)iblock, bh_result, create); @@ -149,17 +154,8 @@ static int ocfs2_get_block(struct inode *inode, sector_t iblock, goto bail; } - /* this can happen if another node truncs after our extend! */ - spin_lock(&OCFS2_I(inode)->ip_lock); - if (iblock >= ocfs2_clusters_to_blocks(inode->i_sb, - OCFS2_I(inode)->ip_clusters)) - err = -EIO; - spin_unlock(&OCFS2_I(inode)->ip_lock); - if (err) - goto bail; - - err = ocfs2_extent_map_get_blocks(inode, iblock, 1, &p_blkno, - NULL); + err = ocfs2_extent_map_get_blocks(inode, iblock, &p_blkno, NULL, + &ext_flags); if (err) { mlog(ML_ERROR, "Error %d from get_blocks(0x%p, %llu, 1, " "%llu, NULL)\n", err, inode, (unsigned long long)iblock, @@ -167,22 +163,39 @@ static int ocfs2_get_block(struct inode *inode, sector_t iblock, goto bail; } - map_bh(bh_result, inode->i_sb, p_blkno); - - if (bh_result->b_blocknr == 0) { - err = -EIO; - mlog(ML_ERROR, "iblock = %llu p_blkno = %llu blkno=(%llu)\n", - (unsigned long long)iblock, - (unsigned long long)p_blkno, - (unsigned long long)OCFS2_I(inode)->ip_blkno); - } + /* + * ocfs2 never allocates in this function - the only time we + * need to use BH_New is when we're extending i_size on a file + * system which doesn't support holes, in which case BH_New + * allows block_prepare_write() to zero. + */ + mlog_bug_on_msg(create && p_blkno == 0 && ocfs2_sparse_alloc(osb), + "ino %lu, iblock %llu\n", inode->i_ino, + (unsigned long long)iblock); + + /* Treat the unwritten extent as a hole for zeroing purposes. */ + if (p_blkno && !(ext_flags & OCFS2_EXT_UNWRITTEN)) + map_bh(bh_result, inode->i_sb, p_blkno); + + if (!ocfs2_sparse_alloc(osb)) { + if (p_blkno == 0) { + err = -EIO; + mlog(ML_ERROR, + "iblock = %llu p_blkno = %llu blkno=(%llu)\n", + (unsigned long long)iblock, + (unsigned long long)p_blkno, + (unsigned long long)OCFS2_I(inode)->ip_blkno); + mlog(ML_ERROR, "Size %llu, clusters %u\n", (unsigned long long)i_size_read(inode), OCFS2_I(inode)->ip_clusters); + dump_stack(); + } - past_eof = ocfs2_blocks_for_bytes(inode->i_sb, i_size_read(inode)); - mlog(0, "Inode %lu, past_eof = %llu\n", inode->i_ino, - (unsigned long long)past_eof); + past_eof = ocfs2_blocks_for_bytes(inode->i_sb, i_size_read(inode)); + mlog(0, "Inode %lu, past_eof = %llu\n", inode->i_ino, + (unsigned long long)past_eof); - if (create && (iblock >= past_eof)) - set_buffer_new(bh_result); + if (create && (iblock >= past_eof)) + set_buffer_new(bh_result); + } bail: if (err < 0) @@ -276,8 +289,11 @@ static int ocfs2_writepage(struct page *page, struct writeback_control *wbc) return ret; } -/* This can also be called from ocfs2_write_zero_page() which has done - * it's own cluster locking. */ +/* + * This is called from ocfs2_write_zero_page() which has handled it's + * own cluster locking and has ensured allocation exists for those + * blocks to be written. + */ int ocfs2_prepare_write_nolock(struct inode *inode, struct page *page, unsigned from, unsigned to) { @@ -292,44 +308,17 @@ int ocfs2_prepare_write_nolock(struct inode *inode, struct page *page, return ret; } -/* - * ocfs2_prepare_write() can be an outer-most ocfs2 call when it is called - * from loopback. It must be able to perform its own locking around - * ocfs2_get_block(). - */ -static int ocfs2_prepare_write(struct file *file, struct page *page, - unsigned from, unsigned to) -{ - struct inode *inode = page->mapping->host; - int ret; - - mlog_entry("(0x%p, 0x%p, %u, %u)\n", file, page, from, to); - - ret = ocfs2_meta_lock_with_page(inode, NULL, 0, page); - if (ret != 0) { - mlog_errno(ret); - goto out; - } - - ret = ocfs2_prepare_write_nolock(inode, page, from, to); - - ocfs2_meta_unlock(inode, 0); -out: - mlog_exit(ret); - return ret; -} - /* Taken from ext3. We don't necessarily need the full blown * functionality yet, but IMHO it's better to cut and paste the whole * thing so we can avoid introducing our own bugs (and easily pick up * their fixes when they happen) --Mark */ -static int walk_page_buffers( handle_t *handle, - struct buffer_head *head, - unsigned from, - unsigned to, - int *partial, - int (*fn)( handle_t *handle, - struct buffer_head *bh)) +int walk_page_buffers( handle_t *handle, + struct buffer_head *head, + unsigned from, + unsigned to, + int *partial, + int (*fn)( handle_t *handle, + struct buffer_head *bh)) { struct buffer_head *bh; unsigned block_start, block_end; @@ -388,95 +377,6 @@ out: return handle; } -static int ocfs2_commit_write(struct file *file, struct page *page, - unsigned from, unsigned to) -{ - int ret; - struct buffer_head *di_bh = NULL; - struct inode *inode = page->mapping->host; - handle_t *handle = NULL; - struct ocfs2_dinode *di; - - mlog_entry("(0x%p, 0x%p, %u, %u)\n", file, page, from, to); - - /* NOTE: ocfs2_file_aio_write has ensured that it's safe for - * us to continue here without rechecking the I/O against - * changed inode values. - * - * 1) We're currently holding the inode alloc lock, so no - * nodes can change it underneath us. - * - * 2) We've had to take the metadata lock at least once - * already to check for extending writes, suid removal, etc. - * The meta data update code then ensures that we don't get a - * stale inode allocation image (i_size, i_clusters, etc). - */ - - ret = ocfs2_meta_lock_with_page(inode, &di_bh, 1, page); - if (ret != 0) { - mlog_errno(ret); - goto out; - } - - ret = ocfs2_data_lock_with_page(inode, 1, page); - if (ret != 0) { - mlog_errno(ret); - goto out_unlock_meta; - } - - handle = ocfs2_start_walk_page_trans(inode, page, from, to); - if (IS_ERR(handle)) { - ret = PTR_ERR(handle); - goto out_unlock_data; - } - - /* Mark our buffer early. We'd rather catch this error up here - * as opposed to after a successful commit_write which would - * require us to set back inode->i_size. */ - ret = ocfs2_journal_access(handle, inode, di_bh, - OCFS2_JOURNAL_ACCESS_WRITE); - if (ret < 0) { - mlog_errno(ret); - goto out_commit; - } - - /* might update i_size */ - ret = generic_commit_write(file, page, from, to); - if (ret < 0) { - mlog_errno(ret); - goto out_commit; - } - - di = (struct ocfs2_dinode *)di_bh->b_data; - - /* ocfs2_mark_inode_dirty() is too heavy to use here. */ - 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); - - inode->i_blocks = ocfs2_align_bytes_to_sectors((u64)(i_size_read(inode))); - di->i_size = cpu_to_le64((u64)i_size_read(inode)); - - ret = ocfs2_journal_dirty(handle, di_bh); - if (ret < 0) { - mlog_errno(ret); - goto out_commit; - } - -out_commit: - ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); -out_unlock_data: - ocfs2_data_unlock(inode, 1); -out_unlock_meta: - ocfs2_meta_unlock(inode, 1); -out: - if (di_bh) - brelse(di_bh); - - mlog_exit(ret); - return ret; -} - static sector_t ocfs2_bmap(struct address_space *mapping, sector_t block) { sector_t status; @@ -499,8 +399,7 @@ static sector_t ocfs2_bmap(struct address_space *mapping, sector_t block) down_read(&OCFS2_I(inode)->ip_alloc_sem); } - err = ocfs2_extent_map_get_blocks(inode, block, 1, &p_blkno, - NULL); + err = ocfs2_extent_map_get_blocks(inode, block, &p_blkno, NULL, NULL); if (!INODE_JOURNAL(inode)) { up_read(&OCFS2_I(inode)->ip_alloc_sem); @@ -540,8 +439,8 @@ static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) { int ret; - u64 p_blkno, inode_blocks; - int contig_blocks; + u64 p_blkno, inode_blocks, contig_blocks; + unsigned int ext_flags; unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits; unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits; @@ -549,33 +448,20 @@ static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock, * nicely aligned and of the right size, so there's no need * for us to check any of that. */ - spin_lock(&OCFS2_I(inode)->ip_lock); - inode_blocks = ocfs2_clusters_to_blocks(inode->i_sb, - OCFS2_I(inode)->ip_clusters); - - /* - * For a read which begins past the end of file, we return a hole. - */ - if (!create && (iblock >= inode_blocks)) { - spin_unlock(&OCFS2_I(inode)->ip_lock); - ret = 0; - goto bail; - } + inode_blocks = ocfs2_blocks_for_bytes(inode->i_sb, i_size_read(inode)); /* * Any write past EOF is not allowed because we'd be extending. */ if (create && (iblock + max_blocks) > inode_blocks) { - spin_unlock(&OCFS2_I(inode)->ip_lock); ret = -EIO; goto bail; } - spin_unlock(&OCFS2_I(inode)->ip_lock); /* This figures out the size of the next contiguous block, and * our logical offset */ - ret = ocfs2_extent_map_get_blocks(inode, iblock, 1, &p_blkno, - &contig_blocks); + ret = ocfs2_extent_map_get_blocks(inode, iblock, &p_blkno, + &contig_blocks, &ext_flags); if (ret) { mlog(ML_ERROR, "get_blocks() failed iblock=%llu\n", (unsigned long long)iblock); @@ -583,7 +469,37 @@ static int ocfs2_direct_IO_get_blocks(struct inode *inode, sector_t iblock, goto bail; } - map_bh(bh_result, inode->i_sb, p_blkno); + if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)) && !p_blkno) { + ocfs2_error(inode->i_sb, + "Inode %llu has a hole at block %llu\n", + (unsigned long long)OCFS2_I(inode)->ip_blkno, + (unsigned long long)iblock); + ret = -EROFS; + goto bail; + } + + /* + * get_more_blocks() expects us to describe a hole by clearing + * the mapped bit on bh_result(). + * + * Consider an unwritten extent as a hole. + */ + if (p_blkno && !(ext_flags & OCFS2_EXT_UNWRITTEN)) + map_bh(bh_result, inode->i_sb, p_blkno); + else { + /* + * ocfs2_prepare_inode_for_write() should have caught + * the case where we'd be filling a hole and triggered + * a buffered write instead. + */ + if (create) { + ret = -EIO; + mlog_errno(ret); + goto bail; + } + + clear_buffer_mapped(bh_result); + } /* make sure we don't map more than max_blocks blocks here as that's all the kernel will handle at this point. */ @@ -606,12 +522,17 @@ static void ocfs2_dio_end_io(struct kiocb *iocb, void *private) { struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; + int level; /* this io's submitter should not have unlocked this before we could */ BUG_ON(!ocfs2_iocb_is_rw_locked(iocb)); + ocfs2_iocb_clear_rw_locked(iocb); - up_read(&inode->i_alloc_sem); - ocfs2_rw_unlock(inode, 0); + + level = ocfs2_iocb_rw_locked_level(iocb); + if (!level) + up_read(&inode->i_alloc_sem); + ocfs2_rw_unlock(inode, level); } /* @@ -647,23 +568,27 @@ static ssize_t ocfs2_direct_IO(int rw, mlog_entry_void(); - /* - * We get PR data locks even for O_DIRECT. This allows - * concurrent O_DIRECT I/O but doesn't let O_DIRECT with - * extending and buffered zeroing writes race. If they did - * race then the buffered zeroing could be written back after - * the O_DIRECT I/O. It's one thing to tell people not to mix - * buffered and O_DIRECT writes, but expecting them to - * understand that file extension is also an implicit buffered - * write is too much. By getting the PR we force writeback of - * the buffered zeroing before proceeding. - */ - ret = ocfs2_data_lock(inode, 0); - if (ret < 0) { - mlog_errno(ret); - goto out; + if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) { + /* + * We get PR data locks even for O_DIRECT. This + * allows concurrent O_DIRECT I/O but doesn't let + * O_DIRECT with extending and buffered zeroing writes + * race. If they did race then the buffered zeroing + * could be written back after the O_DIRECT I/O. It's + * one thing to tell people not to mix buffered and + * O_DIRECT writes, but expecting them to understand + * that file extension is also an implicit buffered + * write is too much. By getting the PR we force + * writeback of the buffered zeroing before + * proceeding. + */ + ret = ocfs2_data_lock(inode, 0); + if (ret < 0) { + mlog_errno(ret); + goto out; + } + ocfs2_data_unlock(inode, 0); } - ocfs2_data_unlock(inode, 0); ret = blockdev_direct_IO_no_locking(rw, iocb, inode, inode->i_sb->s_bdev, iov, offset, @@ -675,11 +600,715 @@ out: return ret; } +static void ocfs2_figure_cluster_boundaries(struct ocfs2_super *osb, + u32 cpos, + unsigned int *start, + unsigned int *end) +{ + unsigned int cluster_start = 0, cluster_end = PAGE_CACHE_SIZE; + + if (unlikely(PAGE_CACHE_SHIFT > osb->s_clustersize_bits)) { + unsigned int cpp; + + cpp = 1 << (PAGE_CACHE_SHIFT - osb->s_clustersize_bits); + + cluster_start = cpos % cpp; + cluster_start = cluster_start << osb->s_clustersize_bits; + + cluster_end = cluster_start + osb->s_clustersize; + } + + BUG_ON(cluster_start > PAGE_SIZE); + BUG_ON(cluster_end > PAGE_SIZE); + + if (start) + *start = cluster_start; + if (end) + *end = cluster_end; +} + +/* + * 'from' and 'to' are the region in the page to avoid zeroing. + * + * If pagesize > clustersize, this function will avoid zeroing outside + * of the cluster boundary. + * + * from == to == 0 is code for "zero the entire cluster region" + */ +static void ocfs2_clear_page_regions(struct page *page, + struct ocfs2_super *osb, u32 cpos, + unsigned from, unsigned to) +{ + void *kaddr; + unsigned int cluster_start, cluster_end; + + ocfs2_figure_cluster_boundaries(osb, cpos, &cluster_start, &cluster_end); + + kaddr = kmap_atomic(page, KM_USER0); + + if (from || to) { + if (from > cluster_start) + memset(kaddr + cluster_start, 0, from - cluster_start); + if (to < cluster_end) + memset(kaddr + to, 0, cluster_end - to); + } else { + memset(kaddr + cluster_start, 0, cluster_end - cluster_start); + } + + kunmap_atomic(kaddr, KM_USER0); +} + +/* + * Some of this taken from block_prepare_write(). We already have our + * mapping by now though, and the entire write will be allocating or + * it won't, so not much need to use BH_New. + * + * This will also skip zeroing, which is handled externally. + */ +int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno, + struct inode *inode, unsigned int from, + unsigned int to, int new) +{ + int ret = 0; + struct buffer_head *head, *bh, *wait[2], **wait_bh = wait; + unsigned int block_end, block_start; + unsigned int bsize = 1 << inode->i_blkbits; + + if (!page_has_buffers(page)) + create_empty_buffers(page, bsize, 0); + + head = page_buffers(page); + for (bh = head, block_start = 0; bh != head || !block_start; + bh = bh->b_this_page, block_start += bsize) { + block_end = block_start + bsize; + + /* + * Ignore blocks outside of our i/o range - + * they may belong to unallocated clusters. + */ + if (block_start >= to || block_end <= from) { + if (PageUptodate(page)) + set_buffer_uptodate(bh); + continue; + } + + /* + * For an allocating write with cluster size >= page + * size, we always write the entire page. + */ + + if (buffer_new(bh)) + clear_buffer_new(bh); + + if (!buffer_mapped(bh)) { + map_bh(bh, inode->i_sb, *p_blkno); + unmap_underlying_metadata(bh->b_bdev, bh->b_blocknr); + } + + if (PageUptodate(page)) { + if (!buffer_uptodate(bh)) + set_buffer_uptodate(bh); + } else if (!buffer_uptodate(bh) && !buffer_delay(bh) && + (block_start < from || block_end > to)) { + ll_rw_block(READ, 1, &bh); + *wait_bh++=bh; + } + + *p_blkno = *p_blkno + 1; + } + + /* + * If we issued read requests - let them complete. + */ + while(wait_bh > wait) { + wait_on_buffer(*--wait_bh); + if (!buffer_uptodate(*wait_bh)) + ret = -EIO; + } + + if (ret == 0 || !new) + return ret; + + /* + * If we get -EIO above, zero out any newly allocated blocks + * to avoid exposing stale data. + */ + 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); + set_buffer_uptodate(bh); + mark_buffer_dirty(bh); + +next_bh: + block_start = block_end; + bh = bh->b_this_page; + } while (bh != head); + + return ret; +} + +/* + * 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(). + */ +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 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); + + ocfs2_figure_cluster_boundaries(osb, wc->w_cpos, &cluster_start, + &cluster_end); + + from = sp->s_offset; + src_from = sp->s_buf_offset; + bytes = wc->w_count; + + 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; + + 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; + } + + BUG_ON(from > PAGE_CACHE_SIZE); + BUG_ON(to > PAGE_CACHE_SIZE); + BUG_ON(from > osb->s_clustersize); + BUG_ON(to > osb->s_clustersize); + + 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); + + wc->w_finished_copy = 1; + + *ret_from = from; + *ret_to = to; +out: + + return bytes ? (unsigned int)bytes : ret; +} + +/* + * This will copy user data from the iovec in the buffered write + * context. + */ +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) +{ + 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); + + ocfs2_figure_cluster_boundaries(osb, wc->w_cpos, &cluster_start, + &cluster_end); + + buf = cur_iov->iov_base + bp->b_cur_off; + src_from = (unsigned long)buf & ~PAGE_CACHE_MASK; + + from = wc->w_pos & (PAGE_CACHE_SIZE - 1); + + /* + * 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); + } + + to = from + bytes; + + 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; + } + + BUG_ON(from > PAGE_CACHE_SIZE); + BUG_ON(to > PAGE_CACHE_SIZE); + BUG_ON(from > osb->s_clustersize); + BUG_ON(to > osb->s_clustersize); + + dst = kmap(wc->w_this_page); + memcpy(dst + from, bp->b_src_buf + src_from, bytes); + kunmap(wc->w_this_page); + + /* + * 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; + + *ret_from = from; + *ret_to = to; +out: + + return bytes ? (unsigned int)bytes : ret; +} + +/* + * 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. + */ +int ocfs2_write_data_page(struct inode *inode, handle_t *handle, + u64 *p_blkno, struct page *page, + struct ocfs2_write_ctxt *wc, int new) +{ + int ret, copied = 0; + unsigned int from = 0, to = 0; + unsigned int cluster_start, cluster_end; + unsigned int zero_from = 0, zero_to = 0; + + ocfs2_figure_cluster_boundaries(OCFS2_SB(inode->i_sb), wc->w_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) { + mlog_errno(ret); + goto out; + } + + copied = ret; + + zero_from = from; + zero_to = to; + if (new) { + from = cluster_start; + to = cluster_end; + } + } else { + /* + * If we haven't allocated the new page yet, we + * shouldn't be writing it out without copying user + * data. This is likely a math error from the caller. + */ + BUG_ON(!new); + + from = cluster_start; + to = cluster_end; + + ret = ocfs2_map_page_blocks(page, p_blkno, inode, + cluster_start, cluster_end, 1); + if (ret) { + mlog_errno(ret); + goto out; + } + } + + /* + * Parts of newly allocated pages need to be zero'd. + * + * Above, we have also rewritten 'to' and 'from' - as far as + * the rest of the function is concerned, the entire cluster + * range inside of a page needs to be written. + * + * We can skip this if the page is up to date - it's already + * been zero'd from being read in as a hole. + */ + if (new && !PageUptodate(page)) + ocfs2_clear_page_regions(page, OCFS2_SB(inode->i_sb), + wc->w_cpos, zero_from, zero_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; +} + +/* + * 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). + */ +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) +{ + 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; + struct inode *inode = mapping->host; + unsigned long index, start; + struct page **cpages; + + new = phys == 0 ? 1 : 0; + + /* + * 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); + } else { + start = wc->w_pos >> PAGE_CACHE_SHIFT; + v_blkno = wc->w_pos >> inode->i_sb->s_blocksize_bits; + } + + for(i = 0; i < numpages; i++) { + index = start + i; + + cpages[i] = grab_cache_page(mapping, index); + if (!cpages[i]) { + ret = -ENOMEM; + mlog_errno(ret); + goto out; + } + } + + if (new) { + /* + * This is safe to call with the page locks - it won't take + * any additional semaphores or cluster locks. + */ + tmp_pos = wc->w_cpos; + ret = ocfs2_do_extend_allocation(OCFS2_SB(inode->i_sb), inode, + &tmp_pos, 1, di_bh, handle, + data_ac, meta_ac, NULL); + /* + * This shouldn't happen because we must have already + * calculated the correct meta data allocation required. The + * internal tree allocation code should know how to increase + * transaction credits itself. + * + * If need be, we could handle -EAGAIN for a + * RESTART_TRANS here. + */ + mlog_bug_on_msg(ret == -EAGAIN, + "Inode %llu: EAGAIN return during allocation.\n", + (unsigned long long)OCFS2_I(inode)->ip_blkno); + if (ret < 0) { + mlog_errno(ret); + goto out; + } + } + + 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); + 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; + } + + copied += ret; + } + +out: + for(i = 0; i < numpages; i++) { + unlock_page(cpages[i]); + mark_page_accessed(cpages[i]); + page_cache_release(cpages[i]); + } + kfree(cpages); + + return copied ? copied : 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) +{ + wc->w_count = count; + wc->w_pos = pos; + wc->w_cpos = wc->w_pos >> osb->s_clustersize_bits; + wc->w_finished_copy = 0; + + if (unlikely(PAGE_CACHE_SHIFT > osb->s_clustersize_bits)) + wc->w_large_pages = 1; + else + wc->w_large_pages = 0; + + wc->w_write_data_page = cb; + wc->w_private = cb_priv; +} + +/* + * 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 + * + * 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. + */ +ssize_t ocfs2_buffered_write_cluster(struct file *file, loff_t pos, + size_t count, ocfs2_page_writer *actor, + void *priv) +{ + int ret, credits = OCFS2_INODE_UPDATE_CREDITS; + ssize_t written = 0; + u32 phys; + struct inode *inode = file->f_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); + if (ret) { + mlog_errno(ret); + goto out; + } + 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); + if (ret) { + mlog_errno(ret); + goto out_meta; + } + + /* phys == 0 means that allocation is required. */ + if (phys == 0) { + ret = ocfs2_lock_allocators(inode, di, 1, &data_ac, &meta_ac); + if (ret) { + mlog_errno(ret); + goto out_meta; + } + + credits = ocfs2_calc_extend_credits(inode->i_sb, di, 1); + } + + ret = ocfs2_data_lock(inode, 1); + if (ret) { + mlog_errno(ret); + goto out_meta; + } + + handle = ocfs2_start_trans(osb, credits); + if (IS_ERR(handle)) { + ret = PTR_ERR(handle); + mlog_errno(ret); + goto out_data; + } + + written = ocfs2_write(file, phys, handle, di_bh, data_ac, + meta_ac, &wc); + if (written < 0) { + ret = written; + mlog_errno(ret); + goto out_commit; + } + + ret = ocfs2_journal_access(handle, inode, di_bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out_commit; + } + + pos += written; + if (pos > inode->i_size) { + i_size_write(inode, pos); + mark_inode_dirty(inode); + } + inode->i_blocks = ocfs2_inode_sector_count(inode); + di->i_size = cpu_to_le64((u64)i_size_read(inode)); + 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); + + 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); + +out_meta: + 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; +} + const struct address_space_operations ocfs2_aops = { .readpage = ocfs2_readpage, .writepage = ocfs2_writepage, - .prepare_write = ocfs2_prepare_write, - .commit_write = ocfs2_commit_write, .bmap = ocfs2_bmap, .sync_page = block_sync_page, .direct_IO = ocfs2_direct_IO, diff --git a/fs/ocfs2/aops.h b/fs/ocfs2/aops.h index f446a15..45821d4 100644 --- a/fs/ocfs2/aops.h +++ b/fs/ocfs2/aops.h @@ -30,12 +30,83 @@ handle_t *ocfs2_start_walk_page_trans(struct inode *inode, unsigned from, unsigned to); +int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno, + struct inode *inode, unsigned int from, + unsigned int to, int new); + +int walk_page_buffers( handle_t *handle, + struct buffer_head *head, + unsigned from, + unsigned to, + int *partial, + 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 *); + +ssize_t ocfs2_buffered_write_cluster(struct file *file, loff_t pos, + size_t count, ocfs2_page_writer *actor, + void *priv); + +struct ocfs2_write_ctxt { + size_t w_count; + loff_t w_pos; + u32 w_cpos; + unsigned int w_finished_copy; + + /* 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); + /* all ocfs2_dio_end_io()'s fault */ #define ocfs2_iocb_is_rw_locked(iocb) \ test_bit(0, (unsigned long *)&iocb->private) -#define ocfs2_iocb_set_rw_locked(iocb) \ - set_bit(0, (unsigned long *)&iocb->private) +static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level) +{ + set_bit(0, (unsigned long *)&iocb->private); + if (level) + set_bit(1, (unsigned long *)&iocb->private); + else + clear_bit(1, (unsigned long *)&iocb->private); +} #define ocfs2_iocb_clear_rw_locked(iocb) \ clear_bit(0, (unsigned long *)&iocb->private) - +#define ocfs2_iocb_rw_locked_level(iocb) \ + test_bit(1, (unsigned long *)&iocb->private) #endif /* OCFS2_FILE_H */ diff --git a/fs/ocfs2/cluster/quorum.c b/fs/ocfs2/cluster/quorum.c index 4705d65..bbacf7d 100644 --- a/fs/ocfs2/cluster/quorum.c +++ b/fs/ocfs2/cluster/quorum.c @@ -46,6 +46,7 @@ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/workqueue.h> +#include <linux/reboot.h> #include "heartbeat.h" #include "nodemanager.h" @@ -72,7 +73,9 @@ static void o2quo_fence_self(void) /* panic spins with interrupts enabled. with preempt * threads can still schedule, etc, etc */ o2hb_stop_all_regions(); - panic("ocfs2 is very sorry to be fencing this system by panicing\n"); + + printk("ocfs2 is very sorry to be fencing this system by restarting\n"); + emergency_restart(); } /* Indicate that a timeout occured on a hearbeat region write. The diff --git a/fs/ocfs2/cluster/tcp_internal.h b/fs/ocfs2/cluster/tcp_internal.h index 4dae5df..9606111 100644 --- a/fs/ocfs2/cluster/tcp_internal.h +++ b/fs/ocfs2/cluster/tcp_internal.h @@ -38,6 +38,9 @@ * locking semantics of the file system using the protocol. It should * be somewhere else, I'm sure, but right now it isn't. * + * New in version 8: + * - Replace delete inode votes with a cluster lock + * * New in version 7: * - DLM join domain includes the live nodemap * @@ -57,7 +60,7 @@ * - full 64 bit i_size in the metadata lock lvbs * - introduction of "rw" lock and pushing meta/data locking down */ -#define O2NET_PROTOCOL_VERSION 7ULL +#define O2NET_PROTOCOL_VERSION 8ULL struct o2net_handshake { __be64 protocol_version; __be64 connector_id; diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c index 66821e1..67e6866 100644 --- a/fs/ocfs2/dir.c +++ b/fs/ocfs2/dir.c @@ -358,15 +358,17 @@ int ocfs2_do_extend_dir(struct super_block *sb, { int status; int extend; - u64 p_blkno; + u64 p_blkno, v_blkno; spin_lock(&OCFS2_I(dir)->ip_lock); extend = (i_size_read(dir) == ocfs2_clusters_to_bytes(sb, OCFS2_I(dir)->ip_clusters)); spin_unlock(&OCFS2_I(dir)->ip_lock); if (extend) { - status = ocfs2_do_extend_allocation(OCFS2_SB(sb), dir, 1, - parent_fe_bh, handle, + u32 offset = OCFS2_I(dir)->ip_clusters; + + status = ocfs2_do_extend_allocation(OCFS2_SB(sb), dir, &offset, + 1, parent_fe_bh, handle, data_ac, meta_ac, NULL); BUG_ON(status == -EAGAIN); if (status < 0) { @@ -375,9 +377,8 @@ int ocfs2_do_extend_dir(struct super_block *sb, } } - status = ocfs2_extent_map_get_blocks(dir, (dir->i_blocks >> - (sb->s_blocksize_bits - 9)), - 1, &p_blkno, NULL); + v_blkno = ocfs2_blocks_for_bytes(sb, i_size_read(dir)); + status = ocfs2_extent_map_get_blocks(dir, v_blkno, &p_blkno, NULL, NULL); if (status < 0) { mlog_errno(status); goto bail; @@ -486,7 +487,7 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb, dir_i_size += dir->i_sb->s_blocksize; i_size_write(dir, dir_i_size); - dir->i_blocks = ocfs2_align_bytes_to_sectors(dir_i_size); + dir->i_blocks = ocfs2_inode_sector_count(dir); status = ocfs2_mark_inode_dirty(handle, dir, parent_fe_bh); if (status < 0) { mlog_errno(status); diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c index c558442..d836b98 100644 --- a/fs/ocfs2/dlm/dlmdomain.c +++ b/fs/ocfs2/dlm/dlmdomain.c @@ -430,11 +430,10 @@ redo_bucket: dlm_lockres_put(res); - cond_resched_lock(&dlm->spinlock); - if (dropped) goto redo_bucket; } + cond_resched_lock(&dlm->spinlock); num += n; mlog(0, "%s: touched %d lockreses in bucket %d " "(tot=%d)\n", dlm->name, n, i, num); @@ -1035,7 +1034,7 @@ static int dlm_try_to_join_domain(struct dlm_ctxt *dlm) { int status = 0, tmpstat, node; struct domain_join_ctxt *ctxt; - enum dlm_query_join_response response; + enum dlm_query_join_response response = JOIN_DISALLOW; mlog_entry("%p", dlm); diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c index 6d4a83d..c1807a4 100644 --- a/fs/ocfs2/dlm/dlmrecovery.c +++ b/fs/ocfs2/dlm/dlmrecovery.c @@ -611,6 +611,7 @@ static int dlm_remaster_locks(struct dlm_ctxt *dlm, u8 dead_node) } } while (status != 0); + spin_lock(&dlm_reco_state_lock); switch (ndata->state) { case DLM_RECO_NODE_DATA_INIT: case DLM_RECO_NODE_DATA_FINALIZE_SENT: @@ -641,6 +642,7 @@ static int dlm_remaster_locks(struct dlm_ctxt *dlm, u8 dead_node) ndata->node_num, dead_node); break; } + spin_unlock(&dlm_reco_state_lock); } mlog(0, "done requesting all lock info\n"); diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index e335541..27e43b0 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -225,11 +225,17 @@ static struct ocfs2_lock_res_ops ocfs2_dentry_lops = { .flags = 0, }; +static struct ocfs2_lock_res_ops ocfs2_inode_open_lops = { + .get_osb = ocfs2_get_inode_osb, + .flags = 0, +}; + static inline int ocfs2_is_inode_lock(struct ocfs2_lock_res *lockres) { return lockres->l_type == OCFS2_LOCK_TYPE_META || lockres->l_type == OCFS2_LOCK_TYPE_DATA || - lockres->l_type == OCFS2_LOCK_TYPE_RW; + lockres->l_type == OCFS2_LOCK_TYPE_RW || + lockres->l_type == OCFS2_LOCK_TYPE_OPEN; } static inline struct inode *ocfs2_lock_res_inode(struct ocfs2_lock_res *lockres) @@ -373,6 +379,9 @@ void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res, case OCFS2_LOCK_TYPE_DATA: ops = &ocfs2_inode_data_lops; break; + case OCFS2_LOCK_TYPE_OPEN: + ops = &ocfs2_inode_open_lops; + break; default: mlog_bug_on_msg(1, "type: %d\n", type); ops = NULL; /* thanks, gcc */ @@ -1129,6 +1138,12 @@ int ocfs2_create_new_inode_locks(struct inode *inode) goto bail; } + ret = ocfs2_create_new_lock(osb, &OCFS2_I(inode)->ip_open_lockres, 0, 0); + if (ret) { + mlog_errno(ret); + goto bail; + } + bail: mlog_exit(ret); return ret; @@ -1182,6 +1197,99 @@ void ocfs2_rw_unlock(struct inode *inode, int write) mlog_exit_void(); } +/* + * ocfs2_open_lock always get PR mode lock. + */ +int ocfs2_open_lock(struct inode *inode) +{ + int status = 0; + struct ocfs2_lock_res *lockres; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + + BUG_ON(!inode); + + mlog_entry_void(); + + mlog(0, "inode %llu take PRMODE open lock\n", + (unsigned long long)OCFS2_I(inode)->ip_blkno); + + if (ocfs2_mount_local(osb)) + goto out; + + lockres = &OCFS2_I(inode)->ip_open_lockres; + + status = ocfs2_cluster_lock(OCFS2_SB(inode->i_sb), lockres, + LKM_PRMODE, 0, 0); + if (status < 0) + mlog_errno(status); + +out: + mlog_exit(status); + return status; +} + +int ocfs2_try_open_lock(struct inode *inode, int write) +{ + int status = 0, level; + struct ocfs2_lock_res *lockres; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + + BUG_ON(!inode); + + mlog_entry_void(); + + mlog(0, "inode %llu try to take %s open lock\n", + (unsigned long long)OCFS2_I(inode)->ip_blkno, + write ? "EXMODE" : "PRMODE"); + + if (ocfs2_mount_local(osb)) + goto out; + + lockres = &OCFS2_I(inode)->ip_open_lockres; + + level = write ? LKM_EXMODE : LKM_PRMODE; + + /* + * The file system may already holding a PRMODE/EXMODE open lock. + * Since we pass LKM_NOQUEUE, the request won't block waiting on + * other nodes and the -EAGAIN will indicate to the caller that + * this inode is still in use. + */ + status = ocfs2_cluster_lock(OCFS2_SB(inode->i_sb), lockres, + level, LKM_NOQUEUE, 0); + +out: + mlog_exit(status); + return status; +} + +/* + * ocfs2_open_unlock unlock PR and EX mode open locks. + */ +void ocfs2_open_unlock(struct inode *inode) +{ + struct ocfs2_lock_res *lockres = &OCFS2_I(inode)->ip_open_lockres; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + + mlog_entry_void(); + + mlog(0, "inode %llu drop open lock\n", + (unsigned long long)OCFS2_I(inode)->ip_blkno); + + if (ocfs2_mount_local(osb)) + goto out; + + if(lockres->l_ro_holders) + ocfs2_cluster_unlock(OCFS2_SB(inode->i_sb), lockres, + LKM_PRMODE); + if(lockres->l_ex_holders) + ocfs2_cluster_unlock(OCFS2_SB(inode->i_sb), lockres, + LKM_EXMODE); + +out: + mlog_exit_void(); +} + int ocfs2_data_lock_full(struct inode *inode, int write, int arg_flags) @@ -1387,8 +1495,7 @@ static void ocfs2_refresh_inode_from_lvb(struct inode *inode) if (S_ISLNK(inode->i_mode) && !oi->ip_clusters) inode->i_blocks = 0; else - inode->i_blocks = - ocfs2_align_bytes_to_sectors(i_size_read(inode)); + inode->i_blocks = ocfs2_inode_sector_count(inode); inode->i_uid = be32_to_cpu(lvb->lvb_iuid); inode->i_gid = be32_to_cpu(lvb->lvb_igid); @@ -1479,12 +1586,15 @@ static int ocfs2_meta_lock_update(struct inode *inode, { int status = 0; struct ocfs2_inode_info *oi = OCFS2_I(inode); - struct ocfs2_lock_res *lockres = NULL; + struct ocfs2_lock_res *lockres = &oi->ip_meta_lockres; struct ocfs2_dinode *fe; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); mlog_entry_void(); + if (ocfs2_mount_local(osb)) + goto bail; + spin_lock(&oi->ip_lock); if (oi->ip_flags & OCFS2_INODE_DELETED) { mlog(0, "Orphaned inode %llu was deleted while we " @@ -1496,22 +1606,16 @@ static int ocfs2_meta_lock_update(struct inode *inode, } spin_unlock(&oi->ip_lock); - if (!ocfs2_mount_local(osb)) { - lockres = &oi->ip_meta_lockres; - - if (!ocfs2_should_refresh_lock_res(lockres)) - goto bail; - } + if (!ocfs2_should_refresh_lock_res(lockres)) + goto bail; /* This will discard any caching information we might have had * for the inode metadata. */ ocfs2_metadata_cache_purge(inode); - /* will do nothing for inode types that don't use the extent - * map (directories, bitmap files, etc) */ ocfs2_extent_map_trunc(inode, 0); - if (lockres && ocfs2_meta_lvb_is_trustable(inode, lockres)) { + if (ocfs2_meta_lvb_is_trustable(inode, lockres)) { mlog(0, "Trusting LVB on inode %llu\n", (unsigned long long)oi->ip_blkno); ocfs2_refresh_inode_from_lvb(inode); @@ -1558,8 +1662,7 @@ static int ocfs2_meta_lock_update(struct inode *inode, status = 0; bail_refresh: - if (lockres) - ocfs2_complete_lock_res_refresh(lockres, status); + ocfs2_complete_lock_res_refresh(lockres, status); bail: mlog_exit(status); return status; @@ -1630,7 +1733,6 @@ int ocfs2_meta_lock_full(struct inode *inode, wait_event(osb->recovery_event, ocfs2_node_map_is_empty(osb, &osb->recovery_map)); - acquired = 0; lockres = &OCFS2_I(inode)->ip_meta_lockres; level = ex ? LKM_EXMODE : LKM_PRMODE; dlm_flags = 0; @@ -2458,13 +2560,20 @@ int ocfs2_drop_inode_locks(struct inode *inode) * ocfs2_clear_inode has done it for us. */ err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb), - &OCFS2_I(inode)->ip_data_lockres); + &OCFS2_I(inode)->ip_open_lockres); if (err < 0) mlog_errno(err); status = err; err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb), + &OCFS2_I(inode)->ip_data_lockres); + if (err < 0) + mlog_errno(err); + if (err < 0 && !status) + status = err; + + err = ocfs2_drop_lock(OCFS2_SB(inode->i_sb), &OCFS2_I(inode)->ip_meta_lockres); if (err < 0) mlog_errno(err); diff --git a/fs/ocfs2/dlmglue.h b/fs/ocfs2/dlmglue.h index c343fca..59cb566 100644 --- a/fs/ocfs2/dlmglue.h +++ b/fs/ocfs2/dlmglue.h @@ -80,6 +80,9 @@ void ocfs2_data_unlock(struct inode *inode, int write); int ocfs2_rw_lock(struct inode *inode, int write); void ocfs2_rw_unlock(struct inode *inode, int write); +int ocfs2_open_lock(struct inode *inode); +int ocfs2_try_open_lock(struct inode *inode, int write); +void ocfs2_open_unlock(struct inode *inode); int ocfs2_meta_lock_atime(struct inode *inode, struct vfsmount *vfsmnt, int *level); diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c index 80ac69f..ba2b2ab 100644 --- a/fs/ocfs2/extent_map.c +++ b/fs/ocfs2/extent_map.c @@ -3,8 +3,7 @@ * * extent_map.c * - * In-memory extent map for OCFS2. Man, this code was prettier in - * the library. + * Block/Cluster mapping functions * * Copyright (C) 2004 Oracle. All rights reserved. * @@ -26,1016 +25,528 @@ #include <linux/fs.h> #include <linux/init.h> #include <linux/types.h> -#include <linux/slab.h> -#include <linux/rbtree.h> #define MLOG_MASK_PREFIX ML_EXTENT_MAP #include <cluster/masklog.h> #include "ocfs2.h" +#include "alloc.h" #include "extent_map.h" #include "inode.h" #include "super.h" #include "buffer_head_io.h" - /* - * SUCK SUCK SUCK - * Our headers are so bad that struct ocfs2_extent_map is in ocfs.h - */ - -struct ocfs2_extent_map_entry { - struct rb_node e_node; - int e_tree_depth; - struct ocfs2_extent_rec e_rec; -}; - -struct ocfs2_em_insert_context { - int need_left; - int need_right; - struct ocfs2_extent_map_entry *new_ent; - struct ocfs2_extent_map_entry *old_ent; - struct ocfs2_extent_map_entry *left_ent; - struct ocfs2_extent_map_entry *right_ent; -}; - -static struct kmem_cache *ocfs2_em_ent_cachep = NULL; - - -static struct ocfs2_extent_map_entry * -ocfs2_extent_map_lookup(struct ocfs2_extent_map *em, - u32 cpos, u32 clusters, - struct rb_node ***ret_p, - struct rb_node **ret_parent); -static int ocfs2_extent_map_insert(struct inode *inode, - struct ocfs2_extent_rec *rec, - int tree_depth); -static int ocfs2_extent_map_insert_entry(struct ocfs2_extent_map *em, - struct ocfs2_extent_map_entry *ent); -static int ocfs2_extent_map_find_leaf(struct inode *inode, - u32 cpos, u32 clusters, - struct ocfs2_extent_list *el); -static int ocfs2_extent_map_lookup_read(struct inode *inode, - u32 cpos, u32 clusters, - struct ocfs2_extent_map_entry **ret_ent); -static int ocfs2_extent_map_try_insert(struct inode *inode, - struct ocfs2_extent_rec *rec, - int tree_depth, - struct ocfs2_em_insert_context *ctxt); - -/* returns 1 only if the rec contains all the given clusters -- that is that - * rec's cpos is <= the cluster cpos and that the rec endpoint (cpos + - * clusters) is >= the argument's endpoint */ -static int ocfs2_extent_rec_contains_clusters(struct ocfs2_extent_rec *rec, - u32 cpos, u32 clusters) -{ - if (le32_to_cpu(rec->e_cpos) > cpos) - return 0; - if (cpos + clusters > le32_to_cpu(rec->e_cpos) + - le32_to_cpu(rec->e_clusters)) - return 0; - return 1; -} - - -/* - * Find an entry in the tree that intersects the region passed in. - * Note that this will find straddled intervals, it is up to the - * callers to enforce any boundary conditions. - * - * Callers must hold ip_lock. This lookup is not guaranteed to return - * a tree_depth 0 match, and as such can race inserts if the lock - * were not held. + * The extent caching implementation is intentionally trivial. * - * The rb_node garbage lets insertion share the search. Trivial - * callers pass NULL. + * We only cache a small number of extents stored directly on the + * inode, so linear order operations are acceptable. If we ever want + * to increase the size of the extent map, then these algorithms must + * get smarter. */ -static struct ocfs2_extent_map_entry * -ocfs2_extent_map_lookup(struct ocfs2_extent_map *em, - u32 cpos, u32 clusters, - struct rb_node ***ret_p, - struct rb_node **ret_parent) + +void ocfs2_extent_map_init(struct inode *inode) { - struct rb_node **p = &em->em_extents.rb_node; - struct rb_node *parent = NULL; - struct ocfs2_extent_map_entry *ent = NULL; - - while (*p) - { - parent = *p; - ent = rb_entry(parent, struct ocfs2_extent_map_entry, - e_node); - if ((cpos + clusters) <= le32_to_cpu(ent->e_rec.e_cpos)) { - p = &(*p)->rb_left; - ent = NULL; - } else if (cpos >= (le32_to_cpu(ent->e_rec.e_cpos) + - le32_to_cpu(ent->e_rec.e_clusters))) { - p = &(*p)->rb_right; - ent = NULL; - } else - break; - } + struct ocfs2_inode_info *oi = OCFS2_I(inode); - if (ret_p != NULL) - *ret_p = p; - if (ret_parent != NULL) - *ret_parent = parent; - return ent; + oi->ip_extent_map.em_num_items = 0; + INIT_LIST_HEAD(&oi->ip_extent_map.em_list); } -/* - * Find the leaf containing the interval we want. While we're on our - * way down the tree, fill in every record we see at any depth, because - * we might want it later. - * - * Note that this code is run without ip_lock. That's because it - * sleeps while reading. If someone is also filling the extent list at - * the same time we are, we might have to restart. - */ -static int ocfs2_extent_map_find_leaf(struct inode *inode, - u32 cpos, u32 clusters, - struct ocfs2_extent_list *el) +static void __ocfs2_extent_map_lookup(struct ocfs2_extent_map *em, + unsigned int cpos, + struct ocfs2_extent_map_item **ret_emi) { - int i, ret; - struct buffer_head *eb_bh = NULL; - u64 blkno; - u32 rec_end; - struct ocfs2_extent_block *eb; - struct ocfs2_extent_rec *rec; - - /* - * The bh data containing the el cannot change here, because - * we hold alloc_sem. So we can do this without other - * locks. - */ - while (el->l_tree_depth) - { - blkno = 0; - for (i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) { - rec = &el->l_recs[i]; - rec_end = (le32_to_cpu(rec->e_cpos) + - le32_to_cpu(rec->e_clusters)); - - ret = -EBADR; - if (rec_end > OCFS2_I(inode)->ip_clusters) { - mlog_errno(ret); - ocfs2_error(inode->i_sb, - "Extent %d at e_blkno %llu of inode %llu goes past ip_clusters of %u\n", - i, - (unsigned long long)le64_to_cpu(rec->e_blkno), - (unsigned long long)OCFS2_I(inode)->ip_blkno, - OCFS2_I(inode)->ip_clusters); - goto out_free; - } - - if (rec_end <= cpos) { - ret = ocfs2_extent_map_insert(inode, rec, - le16_to_cpu(el->l_tree_depth)); - if (ret && (ret != -EEXIST)) { - mlog_errno(ret); - goto out_free; - } - continue; - } - if ((cpos + clusters) <= le32_to_cpu(rec->e_cpos)) { - ret = ocfs2_extent_map_insert(inode, rec, - le16_to_cpu(el->l_tree_depth)); - if (ret && (ret != -EEXIST)) { - mlog_errno(ret); - goto out_free; - } - continue; - } + unsigned int range; + struct ocfs2_extent_map_item *emi; - /* - * We've found a record that matches our - * interval. We don't insert it because we're - * about to traverse it. - */ - - /* Check to see if we're stradling */ - ret = -ESRCH; - if (!ocfs2_extent_rec_contains_clusters(rec, - cpos, - clusters)) { - mlog_errno(ret); - goto out_free; - } + *ret_emi = NULL; - /* - * If we've already found a record, the el has - * two records covering the same interval. - * EEEK! - */ - ret = -EBADR; - if (blkno) { - mlog_errno(ret); - ocfs2_error(inode->i_sb, - "Multiple extents for (cpos = %u, clusters = %u) on inode %llu; e_blkno %llu and rec %d at e_blkno %llu\n", - cpos, clusters, - (unsigned long long)OCFS2_I(inode)->ip_blkno, - (unsigned long long)blkno, i, - (unsigned long long)le64_to_cpu(rec->e_blkno)); - goto out_free; - } + list_for_each_entry(emi, &em->em_list, ei_list) { + range = emi->ei_cpos + emi->ei_clusters; - blkno = le64_to_cpu(rec->e_blkno); - } + if (cpos >= emi->ei_cpos && cpos < range) { + list_move(&emi->ei_list, &em->em_list); - /* - * We don't support holes, and we're still up - * in the branches, so we'd better have found someone - */ - ret = -EBADR; - if (!blkno) { - ocfs2_error(inode->i_sb, - "No record found for (cpos = %u, clusters = %u) on inode %llu\n", - cpos, clusters, - (unsigned long long)OCFS2_I(inode)->ip_blkno); - mlog_errno(ret); - goto out_free; - } - - if (eb_bh) { - brelse(eb_bh); - eb_bh = NULL; - } - ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), - blkno, &eb_bh, OCFS2_BH_CACHED, - inode); - if (ret) { - mlog_errno(ret); - goto out_free; - } - eb = (struct ocfs2_extent_block *)eb_bh->b_data; - if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) { - OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, eb); - ret = -EIO; - goto out_free; + *ret_emi = emi; + break; } - el = &eb->h_list; } +} - BUG_ON(el->l_tree_depth); - - for (i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) { - rec = &el->l_recs[i]; - - if ((le32_to_cpu(rec->e_cpos) + le32_to_cpu(rec->e_clusters)) > - OCFS2_I(inode)->ip_clusters) { - ret = -EBADR; - mlog_errno(ret); - ocfs2_error(inode->i_sb, - "Extent %d at e_blkno %llu of inode %llu goes past ip_clusters of %u\n", - i, - (unsigned long long)le64_to_cpu(rec->e_blkno), - (unsigned long long)OCFS2_I(inode)->ip_blkno, - OCFS2_I(inode)->ip_clusters); - return ret; - } - - ret = ocfs2_extent_map_insert(inode, rec, - le16_to_cpu(el->l_tree_depth)); - if (ret && (ret != -EEXIST)) { - mlog_errno(ret); - goto out_free; - } +static int ocfs2_extent_map_lookup(struct inode *inode, unsigned int cpos, + unsigned int *phys, unsigned int *len, + unsigned int *flags) +{ + unsigned int coff; + struct ocfs2_inode_info *oi = OCFS2_I(inode); + struct ocfs2_extent_map_item *emi; + + spin_lock(&oi->ip_lock); + + __ocfs2_extent_map_lookup(&oi->ip_extent_map, cpos, &emi); + if (emi) { + coff = cpos - emi->ei_cpos; + *phys = emi->ei_phys + coff; + if (len) + *len = emi->ei_clusters - coff; + if (flags) + *flags = emi->ei_flags; } - ret = 0; + spin_unlock(&oi->ip_lock); -out_free: - if (eb_bh) - brelse(eb_bh); + if (emi == NULL) + return -ENOENT; - return ret; + return 0; } /* - * This lookup actually will read from disk. It has one invariant: - * It will never re-traverse blocks. This means that all inserts should - * be new regions or more granular regions (both allowed by insert). + * Forget about all clusters equal to or greater than cpos. */ -static int ocfs2_extent_map_lookup_read(struct inode *inode, - u32 cpos, - u32 clusters, - struct ocfs2_extent_map_entry **ret_ent) +void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cpos) { - int ret; - u64 blkno; - struct ocfs2_extent_map *em = &OCFS2_I(inode)->ip_map; - struct ocfs2_extent_map_entry *ent; - struct buffer_head *bh = NULL; - struct ocfs2_extent_block *eb; - struct ocfs2_dinode *di; - struct ocfs2_extent_list *el; - - spin_lock(&OCFS2_I(inode)->ip_lock); - ent = ocfs2_extent_map_lookup(em, cpos, clusters, NULL, NULL); - if (ent) { - if (!ent->e_tree_depth) { - spin_unlock(&OCFS2_I(inode)->ip_lock); - *ret_ent = ent; - return 0; - } - blkno = le64_to_cpu(ent->e_rec.e_blkno); - spin_unlock(&OCFS2_I(inode)->ip_lock); - - ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), blkno, &bh, - OCFS2_BH_CACHED, inode); - if (ret) { - mlog_errno(ret); - if (bh) - brelse(bh); - return ret; + struct list_head *p, *n; + struct ocfs2_extent_map_item *emi; + 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); + + if (emi->ei_cpos >= cpos) { + /* Full truncate of this record. */ + list_move(&emi->ei_list, &tmp_list); + BUG_ON(em->em_num_items == 0); + em->em_num_items--; + continue; } - eb = (struct ocfs2_extent_block *)bh->b_data; - if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) { - OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, eb); - brelse(bh); - return -EIO; - } - el = &eb->h_list; - } else { - spin_unlock(&OCFS2_I(inode)->ip_lock); - ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), - OCFS2_I(inode)->ip_blkno, &bh, - OCFS2_BH_CACHED, inode); - if (ret) { - mlog_errno(ret); - if (bh) - brelse(bh); - return ret; + range = emi->ei_cpos + emi->ei_clusters; + if (range > cpos) { + /* Partial truncate */ + emi->ei_clusters = cpos - emi->ei_cpos; } - di = (struct ocfs2_dinode *)bh->b_data; - if (!OCFS2_IS_VALID_DINODE(di)) { - brelse(bh); - OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, di); - return -EIO; - } - el = &di->id2.i_list; - } - - ret = ocfs2_extent_map_find_leaf(inode, cpos, clusters, el); - brelse(bh); - if (ret) { - mlog_errno(ret); - return ret; } + spin_unlock(&oi->ip_lock); - ent = ocfs2_extent_map_lookup(em, cpos, clusters, NULL, NULL); - if (!ent) { - ret = -ESRCH; - mlog_errno(ret); - return ret; + list_for_each_safe(p, n, &tmp_list) { + emi = list_entry(p, struct ocfs2_extent_map_item, ei_list); + list_del(&emi->ei_list); + kfree(emi); } - - /* FIXME: Make sure this isn't a corruption */ - BUG_ON(ent->e_tree_depth); - - *ret_ent = ent; - - return 0; } /* - * Callers must hold ip_lock. This can insert pieces of the tree, - * thus racing lookup if the lock weren't held. + * Is any part of emi2 contained within emi1 */ -static int ocfs2_extent_map_insert_entry(struct ocfs2_extent_map *em, - struct ocfs2_extent_map_entry *ent) +static int ocfs2_ei_is_contained(struct ocfs2_extent_map_item *emi1, + struct ocfs2_extent_map_item *emi2) { - struct rb_node **p, *parent; - struct ocfs2_extent_map_entry *old_ent; + unsigned int range1, range2; - old_ent = ocfs2_extent_map_lookup(em, le32_to_cpu(ent->e_rec.e_cpos), - le32_to_cpu(ent->e_rec.e_clusters), - &p, &parent); - if (old_ent) - return -EEXIST; + /* + * Check if logical start of emi2 is inside emi1 + */ + range1 = emi1->ei_cpos + emi1->ei_clusters; + if (emi2->ei_cpos >= emi1->ei_cpos && emi2->ei_cpos < range1) + return 1; - rb_link_node(&ent->e_node, parent, p); - rb_insert_color(&ent->e_node, &em->em_extents); + /* + * Check if logical end of emi2 is inside emi1 + */ + range2 = emi2->ei_cpos + emi2->ei_clusters; + if (range2 > emi1->ei_cpos && range2 <= range1) + return 1; return 0; } +static void ocfs2_copy_emi_fields(struct ocfs2_extent_map_item *dest, + struct ocfs2_extent_map_item *src) +{ + dest->ei_cpos = src->ei_cpos; + dest->ei_phys = src->ei_phys; + dest->ei_clusters = src->ei_clusters; + dest->ei_flags = src->ei_flags; +} /* - * Simple rule: on any return code other than -EAGAIN, anything left - * in the insert_context will be freed. - * - * Simple rule #2: A return code of -EEXIST from this function or - * its calls to ocfs2_extent_map_insert_entry() signifies that another - * thread beat us to the insert. It is not an actual error, but it - * tells the caller we have no more work to do. + * Try to merge emi with ins. Returns 1 if merge succeeds, zero + * otherwise. */ -static int ocfs2_extent_map_try_insert(struct inode *inode, - struct ocfs2_extent_rec *rec, - int tree_depth, - struct ocfs2_em_insert_context *ctxt) +static int ocfs2_try_to_merge_extent_map(struct ocfs2_extent_map_item *emi, + struct ocfs2_extent_map_item *ins) { - int ret; - struct ocfs2_extent_map *em = &OCFS2_I(inode)->ip_map; - struct ocfs2_extent_map_entry *old_ent; - - ctxt->need_left = 0; - ctxt->need_right = 0; - ctxt->old_ent = NULL; - - spin_lock(&OCFS2_I(inode)->ip_lock); - ret = ocfs2_extent_map_insert_entry(em, ctxt->new_ent); - if (!ret) { - ctxt->new_ent = NULL; - goto out_unlock; - } - - /* Since insert_entry failed, the map MUST have old_ent */ - old_ent = ocfs2_extent_map_lookup(em, le32_to_cpu(rec->e_cpos), - le32_to_cpu(rec->e_clusters), - NULL, NULL); - - BUG_ON(!old_ent); - - if (old_ent->e_tree_depth < tree_depth) { - /* Another thread beat us to the lower tree_depth */ - ret = -EEXIST; - goto out_unlock; - } - - if (old_ent->e_tree_depth == tree_depth) { - /* - * Another thread beat us to this tree_depth. - * Let's make sure we agree with that thread (the - * extent_rec should be identical). - */ - if (!memcmp(rec, &old_ent->e_rec, - sizeof(struct ocfs2_extent_rec))) - ret = 0; - else - /* FIXME: Should this be ESRCH/EBADR??? */ - ret = -EEXIST; - - goto out_unlock; - } - /* - * We do it in this order specifically so that no actual tree - * changes occur until we have all the pieces we need. We - * don't want malloc failures to leave an inconsistent tree. - * Whenever we drop the lock, another process could be - * inserting. Also note that, if another process just beat us - * to an insert, we might not need the same pieces we needed - * the first go round. In the end, the pieces we need will - * be used, and the pieces we don't will be freed. + * Handle contiguousness */ - ctxt->need_left = !!(le32_to_cpu(rec->e_cpos) > - le32_to_cpu(old_ent->e_rec.e_cpos)); - ctxt->need_right = !!((le32_to_cpu(old_ent->e_rec.e_cpos) + - le32_to_cpu(old_ent->e_rec.e_clusters)) > - (le32_to_cpu(rec->e_cpos) + le32_to_cpu(rec->e_clusters))); - ret = -EAGAIN; - if (ctxt->need_left) { - if (!ctxt->left_ent) - goto out_unlock; - *(ctxt->left_ent) = *old_ent; - ctxt->left_ent->e_rec.e_clusters = - cpu_to_le32(le32_to_cpu(rec->e_cpos) - - le32_to_cpu(ctxt->left_ent->e_rec.e_cpos)); - } - if (ctxt->need_right) { - if (!ctxt->right_ent) - goto out_unlock; - *(ctxt->right_ent) = *old_ent; - ctxt->right_ent->e_rec.e_cpos = - cpu_to_le32(le32_to_cpu(rec->e_cpos) + - le32_to_cpu(rec->e_clusters)); - ctxt->right_ent->e_rec.e_clusters = - cpu_to_le32((le32_to_cpu(old_ent->e_rec.e_cpos) + - le32_to_cpu(old_ent->e_rec.e_clusters)) - - le32_to_cpu(ctxt->right_ent->e_rec.e_cpos)); - } - - rb_erase(&old_ent->e_node, &em->em_extents); - /* Now that he's erased, set him up for deletion */ - ctxt->old_ent = old_ent; - - if (ctxt->need_left) { - ret = ocfs2_extent_map_insert_entry(em, - ctxt->left_ent); - if (ret) - goto out_unlock; - ctxt->left_ent = NULL; + if (ins->ei_phys == (emi->ei_phys + emi->ei_clusters) && + ins->ei_cpos == (emi->ei_cpos + emi->ei_clusters) && + ins->ei_flags == emi->ei_flags) { + emi->ei_clusters += ins->ei_clusters; + return 1; + } else if ((ins->ei_phys + ins->ei_clusters) == emi->ei_phys && + (ins->ei_cpos + ins->ei_clusters) == emi->ei_phys && + ins->ei_flags == emi->ei_flags) { + emi->ei_phys = ins->ei_phys; + emi->ei_cpos = ins->ei_cpos; + emi->ei_clusters += ins->ei_clusters; + return 1; } - if (ctxt->need_right) { - ret = ocfs2_extent_map_insert_entry(em, - ctxt->right_ent); - if (ret) - goto out_unlock; - ctxt->right_ent = NULL; + /* + * Overlapping extents - this shouldn't happen unless we've + * split an extent to change it's flags. That is exceedingly + * rare, so there's no sense in trying to optimize it yet. + */ + if (ocfs2_ei_is_contained(emi, ins) || + ocfs2_ei_is_contained(ins, emi)) { + ocfs2_copy_emi_fields(emi, ins); + return 1; } - ret = ocfs2_extent_map_insert_entry(em, ctxt->new_ent); - - if (!ret) - ctxt->new_ent = NULL; - -out_unlock: - spin_unlock(&OCFS2_I(inode)->ip_lock); - - return ret; + /* No merge was possible. */ + return 0; } - -static int ocfs2_extent_map_insert(struct inode *inode, - struct ocfs2_extent_rec *rec, - int tree_depth) +/* + * In order to reduce complexity on the caller, this insert function + * is intentionally liberal in what it will accept. + * + * The only rule is that the truncate call *must* be used whenever + * records have been deleted. This avoids inserting overlapping + * records with different physical mappings. + */ +void ocfs2_extent_map_insert_rec(struct inode *inode, + struct ocfs2_extent_rec *rec) { - int ret; - struct ocfs2_em_insert_context ctxt = {0, }; - - if ((le32_to_cpu(rec->e_cpos) + le32_to_cpu(rec->e_clusters)) > - OCFS2_I(inode)->ip_map.em_clusters) { - ret = -EBADR; - mlog_errno(ret); - return ret; + struct ocfs2_inode_info *oi = OCFS2_I(inode); + struct ocfs2_extent_map *em = &oi->ip_extent_map; + struct ocfs2_extent_map_item *emi, *new_emi = NULL; + struct ocfs2_extent_map_item ins; + + ins.ei_cpos = le32_to_cpu(rec->e_cpos); + ins.ei_phys = ocfs2_blocks_to_clusters(inode->i_sb, + le64_to_cpu(rec->e_blkno)); + ins.ei_clusters = le16_to_cpu(rec->e_leaf_clusters); + ins.ei_flags = rec->e_flags; + +search: + spin_lock(&oi->ip_lock); + + list_for_each_entry(emi, &em->em_list, ei_list) { + if (ocfs2_try_to_merge_extent_map(emi, &ins)) { + list_move(&emi->ei_list, &em->em_list); + spin_unlock(&oi->ip_lock); + goto out; + } } - /* Zero e_clusters means a truncated tail record. It better be EOF */ - if (!rec->e_clusters) { - if ((le32_to_cpu(rec->e_cpos) + le32_to_cpu(rec->e_clusters)) != - OCFS2_I(inode)->ip_map.em_clusters) { - ret = -EBADR; - mlog_errno(ret); - ocfs2_error(inode->i_sb, - "Zero e_clusters on non-tail extent record at e_blkno %llu on inode %llu\n", - (unsigned long long)le64_to_cpu(rec->e_blkno), - (unsigned long long)OCFS2_I(inode)->ip_blkno); - return ret; - } + /* + * No item could be merged. + * + * Either allocate and add a new item, or overwrite the last recently + * inserted. + */ - /* Ignore the truncated tail */ - return 0; - } + if (em->em_num_items < OCFS2_MAX_EXTENT_MAP_ITEMS) { + if (new_emi == NULL) { + spin_unlock(&oi->ip_lock); - ret = -ENOMEM; - ctxt.new_ent = kmem_cache_alloc(ocfs2_em_ent_cachep, - GFP_NOFS); - if (!ctxt.new_ent) { - mlog_errno(ret); - return ret; - } + new_emi = kmalloc(sizeof(*new_emi), GFP_NOFS); + if (new_emi == NULL) + goto out; - ctxt.new_ent->e_rec = *rec; - ctxt.new_ent->e_tree_depth = tree_depth; - - do { - ret = -ENOMEM; - if (ctxt.need_left && !ctxt.left_ent) { - ctxt.left_ent = - kmem_cache_alloc(ocfs2_em_ent_cachep, - GFP_NOFS); - if (!ctxt.left_ent) - break; - } - if (ctxt.need_right && !ctxt.right_ent) { - ctxt.right_ent = - kmem_cache_alloc(ocfs2_em_ent_cachep, - GFP_NOFS); - if (!ctxt.right_ent) - break; + goto search; } - ret = ocfs2_extent_map_try_insert(inode, rec, - tree_depth, &ctxt); - } while (ret == -EAGAIN); - - if ((ret < 0) && (ret != -EEXIST)) - mlog_errno(ret); + ocfs2_copy_emi_fields(new_emi, &ins); + list_add(&new_emi->ei_list, &em->em_list); + em->em_num_items++; + new_emi = NULL; + } else { + BUG_ON(list_empty(&em->em_list) || em->em_num_items == 0); + emi = list_entry(em->em_list.prev, + struct ocfs2_extent_map_item, ei_list); + list_move(&emi->ei_list, &em->em_list); + ocfs2_copy_emi_fields(emi, &ins); + } - if (ctxt.left_ent) - kmem_cache_free(ocfs2_em_ent_cachep, ctxt.left_ent); - if (ctxt.right_ent) - kmem_cache_free(ocfs2_em_ent_cachep, ctxt.right_ent); - if (ctxt.old_ent) - kmem_cache_free(ocfs2_em_ent_cachep, ctxt.old_ent); - if (ctxt.new_ent) - kmem_cache_free(ocfs2_em_ent_cachep, ctxt.new_ent); + spin_unlock(&oi->ip_lock); - return ret; +out: + if (new_emi) + kfree(new_emi); } /* - * Append this record to the tail of the extent map. It must be - * tree_depth 0. The record might be an extension of an existing - * record, and as such that needs to be handled. eg: - * - * Existing record in the extent map: - * - * cpos = 10, len = 10 - * |---------| - * - * New Record: - * - * cpos = 10, len = 20 - * |------------------| - * - * The passed record is the new on-disk record. The new_clusters value - * is how many clusters were added to the file. If the append is a - * contiguous append, the new_clusters has been added to - * rec->e_clusters. If the append is an entirely new extent, then - * rec->e_clusters is == new_clusters. + * Return the 1st index within el which contains an extent start + * larger than v_cluster. */ -int ocfs2_extent_map_append(struct inode *inode, - struct ocfs2_extent_rec *rec, - u32 new_clusters) +static int ocfs2_search_for_hole_index(struct ocfs2_extent_list *el, + u32 v_cluster) { - int ret; - struct ocfs2_extent_map *em = &OCFS2_I(inode)->ip_map; - struct ocfs2_extent_map_entry *ent; - struct ocfs2_extent_rec *old; - - BUG_ON(!new_clusters); - BUG_ON(le32_to_cpu(rec->e_clusters) < new_clusters); + int i; + struct ocfs2_extent_rec *rec; - if (em->em_clusters < OCFS2_I(inode)->ip_clusters) { - /* - * Size changed underneath us on disk. Drop any - * straddling records and update our idea of - * i_clusters - */ - ocfs2_extent_map_drop(inode, em->em_clusters - 1); - em->em_clusters = OCFS2_I(inode)->ip_clusters; - } + for(i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) { + rec = &el->l_recs[i]; - mlog_bug_on_msg((le32_to_cpu(rec->e_cpos) + - le32_to_cpu(rec->e_clusters)) != - (em->em_clusters + new_clusters), - "Inode %llu:\n" - "rec->e_cpos = %u + rec->e_clusters = %u = %u\n" - "em->em_clusters = %u + new_clusters = %u = %u\n", - (unsigned long long)OCFS2_I(inode)->ip_blkno, - le32_to_cpu(rec->e_cpos), le32_to_cpu(rec->e_clusters), - le32_to_cpu(rec->e_cpos) + le32_to_cpu(rec->e_clusters), - em->em_clusters, new_clusters, - em->em_clusters + new_clusters); - - em->em_clusters += new_clusters; - - ret = -ENOENT; - if (le32_to_cpu(rec->e_clusters) > new_clusters) { - /* This is a contiguous append */ - ent = ocfs2_extent_map_lookup(em, le32_to_cpu(rec->e_cpos), 1, - NULL, NULL); - if (ent) { - old = &ent->e_rec; - BUG_ON((le32_to_cpu(rec->e_cpos) + - le32_to_cpu(rec->e_clusters)) != - (le32_to_cpu(old->e_cpos) + - le32_to_cpu(old->e_clusters) + - new_clusters)); - if (ent->e_tree_depth == 0) { - BUG_ON(le32_to_cpu(old->e_cpos) != - le32_to_cpu(rec->e_cpos)); - BUG_ON(le64_to_cpu(old->e_blkno) != - le64_to_cpu(rec->e_blkno)); - ret = 0; - } - /* - * Let non-leafs fall through as -ENOENT to - * force insertion of the new leaf. - */ - le32_add_cpu(&old->e_clusters, new_clusters); - } + if (v_cluster < le32_to_cpu(rec->e_cpos)) + break; } - if (ret == -ENOENT) - ret = ocfs2_extent_map_insert(inode, rec, 0); - if (ret < 0) - mlog_errno(ret); - return ret; + return i; } -#if 0 -/* Code here is included but defined out as it completes the extent - * map api and may be used in the future. */ - /* - * Look up the record containing this cluster offset. This record is - * part of the extent map. Do not free it. Any changes you make to - * it will reflect in the extent map. So, if your last extent - * is (cpos = 10, clusters = 10) and you truncate the file by 5 - * clusters, you can do: + * Figure out the size of a hole which starts at v_cluster within the given + * extent list. * - * ret = ocfs2_extent_map_get_rec(em, orig_size - 5, &rec); - * rec->e_clusters -= 5; + * If there is no more allocation past v_cluster, we return the maximum + * cluster size minus v_cluster. * - * The lookup does not read from disk. If the map isn't filled in for - * an entry, you won't find it. - * - * Also note that the returned record is valid until alloc_sem is - * dropped. After that, truncate and extend can happen. Caveat Emptor. + * If we have in-inode extents, then el points to the dinode list and + * eb_bh is NULL. Otherwise, eb_bh should point to the extent block + * containing el. */ -int ocfs2_extent_map_get_rec(struct inode *inode, u32 cpos, - struct ocfs2_extent_rec **rec, - int *tree_depth) +static int ocfs2_figure_hole_clusters(struct inode *inode, + struct ocfs2_extent_list *el, + struct buffer_head *eb_bh, + u32 v_cluster, + u32 *num_clusters) { - int ret = -ENOENT; - struct ocfs2_extent_map *em = &OCFS2_I(inode)->ip_map; - struct ocfs2_extent_map_entry *ent; + int ret, i; + struct buffer_head *next_eb_bh = NULL; + struct ocfs2_extent_block *eb, *next_eb; - *rec = NULL; + i = ocfs2_search_for_hole_index(el, v_cluster); - if (cpos >= OCFS2_I(inode)->ip_clusters) - return -EINVAL; + if (i == le16_to_cpu(el->l_next_free_rec) && eb_bh) { + eb = (struct ocfs2_extent_block *)eb_bh->b_data; - if (cpos >= em->em_clusters) { /* - * Size changed underneath us on disk. Drop any - * straddling records and update our idea of - * i_clusters + * Check the next leaf for any extents. */ - ocfs2_extent_map_drop(inode, em->em_clusters - 1); - em->em_clusters = OCFS2_I(inode)->ip_clusters ; - } - - ent = ocfs2_extent_map_lookup(&OCFS2_I(inode)->ip_map, cpos, 1, - NULL, NULL); - if (ent) { - *rec = &ent->e_rec; - if (tree_depth) - *tree_depth = ent->e_tree_depth; - ret = 0; - } + if (le64_to_cpu(eb->h_next_leaf_blk) == 0ULL) + goto no_more_extents; - return ret; -} + ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), + le64_to_cpu(eb->h_next_leaf_blk), + &next_eb_bh, OCFS2_BH_CACHED, inode); + if (ret) { + mlog_errno(ret); + goto out; + } + next_eb = (struct ocfs2_extent_block *)next_eb_bh->b_data; -int ocfs2_extent_map_get_clusters(struct inode *inode, - u32 v_cpos, int count, - u32 *p_cpos, int *ret_count) -{ - int ret; - u32 coff, ccount; - struct ocfs2_extent_map *em = &OCFS2_I(inode)->ip_map; - struct ocfs2_extent_map_entry *ent = NULL; + if (!OCFS2_IS_VALID_EXTENT_BLOCK(next_eb)) { + ret = -EROFS; + OCFS2_RO_ON_INVALID_EXTENT_BLOCK(inode->i_sb, next_eb); + goto out; + } - *p_cpos = ccount = 0; + el = &next_eb->h_list; - if ((v_cpos + count) > OCFS2_I(inode)->ip_clusters) - return -EINVAL; + i = ocfs2_search_for_hole_index(el, v_cluster); + } - if ((v_cpos + count) > em->em_clusters) { +no_more_extents: + if (i == le16_to_cpu(el->l_next_free_rec)) { /* - * Size changed underneath us on disk. Drop any - * straddling records and update our idea of - * i_clusters + * We're at the end of our existing allocation. Just + * return the maximum number of clusters we could + * possibly allocate. */ - ocfs2_extent_map_drop(inode, em->em_clusters - 1); - em->em_clusters = OCFS2_I(inode)->ip_clusters; + *num_clusters = UINT_MAX - v_cluster; + } else { + *num_clusters = le32_to_cpu(el->l_recs[i].e_cpos) - v_cluster; } + ret = 0; +out: + brelse(next_eb_bh); + return ret; +} - ret = ocfs2_extent_map_lookup_read(inode, v_cpos, count, &ent); - if (ret) - 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; - if (ent) { - /* We should never find ourselves straddling an interval */ - if (!ocfs2_extent_rec_contains_clusters(&ent->e_rec, - v_cpos, - count)) - return -ESRCH; + for(i = 0; i < le16_to_cpu(el->l_next_free_rec); i++) { + rec = &el->l_recs[i]; - coff = v_cpos - le32_to_cpu(ent->e_rec.e_cpos); - *p_cpos = ocfs2_blocks_to_clusters(inode->i_sb, - le64_to_cpu(ent->e_rec.e_blkno)) + - coff; + rec_start = le32_to_cpu(rec->e_cpos); + clusters = ocfs2_rec_clusters(el, rec); - if (ret_count) - *ret_count = le32_to_cpu(ent->e_rec.e_clusters) - coff; + rec_end = rec_start + clusters; - return 0; + if (v_cluster >= rec_start && v_cluster < rec_end) { + ret = i; + break; + } } - - return -ENOENT; + return ret; } -#endif /* 0 */ - -int ocfs2_extent_map_get_blocks(struct inode *inode, - u64 v_blkno, int count, - u64 *p_blkno, int *ret_count) +int ocfs2_get_clusters(struct inode *inode, u32 v_cluster, + u32 *p_cluster, u32 *num_clusters, + unsigned int *extent_flags) { - int ret; - u64 boff; - u32 cpos, clusters; - int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); - struct ocfs2_extent_map_entry *ent = NULL; - struct ocfs2_extent_map *em = &OCFS2_I(inode)->ip_map; + int ret, i; + unsigned int flags = 0; + struct buffer_head *di_bh = NULL; + struct buffer_head *eb_bh = NULL; + struct ocfs2_dinode *di; + struct ocfs2_extent_block *eb; + struct ocfs2_extent_list *el; struct ocfs2_extent_rec *rec; + u32 coff; - *p_blkno = 0; - - cpos = ocfs2_blocks_to_clusters(inode->i_sb, v_blkno); - clusters = ocfs2_blocks_to_clusters(inode->i_sb, - (u64)count + bpc - 1); - if ((cpos + clusters) > OCFS2_I(inode)->ip_clusters) { - ret = -EINVAL; - mlog_errno(ret); - return ret; - } - - if ((cpos + clusters) > em->em_clusters) { - /* - * Size changed underneath us on disk. Drop any - * straddling records and update our idea of - * i_clusters - */ - ocfs2_extent_map_drop(inode, em->em_clusters - 1); - em->em_clusters = OCFS2_I(inode)->ip_clusters; - } + ret = ocfs2_extent_map_lookup(inode, v_cluster, p_cluster, + num_clusters, extent_flags); + if (ret == 0) + goto out; - ret = ocfs2_extent_map_lookup_read(inode, cpos, clusters, &ent); + ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), OCFS2_I(inode)->ip_blkno, + &di_bh, OCFS2_BH_CACHED, inode); if (ret) { mlog_errno(ret); - return ret; + goto out; } - if (ent) - { - rec = &ent->e_rec; + di = (struct ocfs2_dinode *) di_bh->b_data; + el = &di->id2.i_list; - /* We should never find ourselves straddling an interval */ - if (!ocfs2_extent_rec_contains_clusters(rec, cpos, clusters)) { - ret = -ESRCH; + if (el->l_tree_depth) { + ret = ocfs2_find_leaf(inode, el, v_cluster, &eb_bh); + if (ret) { mlog_errno(ret); - return ret; + goto out; } - boff = ocfs2_clusters_to_blocks(inode->i_sb, cpos - - le32_to_cpu(rec->e_cpos)); - boff += (v_blkno & (u64)(bpc - 1)); - *p_blkno = le64_to_cpu(rec->e_blkno) + boff; + eb = (struct ocfs2_extent_block *) eb_bh->b_data; + el = &eb->h_list; - if (ret_count) { - *ret_count = ocfs2_clusters_to_blocks(inode->i_sb, - le32_to_cpu(rec->e_clusters)) - boff; + if (el->l_tree_depth) { + ocfs2_error(inode->i_sb, + "Inode %lu has non zero tree depth in " + "leaf block %llu\n", inode->i_ino, + (unsigned long long)eb_bh->b_blocknr); + ret = -EROFS; + goto out; } - - return 0; } - return -ENOENT; -} - -int ocfs2_extent_map_init(struct inode *inode) -{ - struct ocfs2_extent_map *em = &OCFS2_I(inode)->ip_map; - - em->em_extents = RB_ROOT; - em->em_clusters = 0; - - return 0; -} - -/* Needs the lock */ -static void __ocfs2_extent_map_drop(struct inode *inode, - u32 new_clusters, - struct rb_node **free_head, - struct ocfs2_extent_map_entry **tail_ent) -{ - struct rb_node *node, *next; - struct ocfs2_extent_map *em = &OCFS2_I(inode)->ip_map; - struct ocfs2_extent_map_entry *ent; + i = ocfs2_search_extent_list(el, v_cluster); + if (i == -1) { + /* + * A hole was found. Return some canned values that + * callers can key on. If asked for, num_clusters will + * be populated with the size of the hole. + */ + *p_cluster = 0; + if (num_clusters) { + ret = ocfs2_figure_hole_clusters(inode, el, eb_bh, + v_cluster, + num_clusters); + if (ret) { + mlog_errno(ret); + goto out; + } + } + } else { + rec = &el->l_recs[i]; - *free_head = NULL; + BUG_ON(v_cluster < le32_to_cpu(rec->e_cpos)); - ent = NULL; - node = rb_last(&em->em_extents); - while (node) - { - next = rb_prev(node); + if (!rec->e_blkno) { + ocfs2_error(inode->i_sb, "Inode %lu has bad extent " + "record (%u, %u, 0)", inode->i_ino, + le32_to_cpu(rec->e_cpos), + ocfs2_rec_clusters(el, rec)); + ret = -EROFS; + goto out; + } - ent = rb_entry(node, struct ocfs2_extent_map_entry, - e_node); - if (le32_to_cpu(ent->e_rec.e_cpos) < new_clusters) - break; + coff = v_cluster - le32_to_cpu(rec->e_cpos); - rb_erase(&ent->e_node, &em->em_extents); + *p_cluster = ocfs2_blocks_to_clusters(inode->i_sb, + le64_to_cpu(rec->e_blkno)); + *p_cluster = *p_cluster + coff; - node->rb_right = *free_head; - *free_head = node; + if (num_clusters) + *num_clusters = ocfs2_rec_clusters(el, rec) - coff; - ent = NULL; - node = next; - } + flags = rec->e_flags; - /* Do we have an entry straddling new_clusters? */ - if (tail_ent) { - if (ent && - ((le32_to_cpu(ent->e_rec.e_cpos) + - le32_to_cpu(ent->e_rec.e_clusters)) > new_clusters)) - *tail_ent = ent; - else - *tail_ent = NULL; + ocfs2_extent_map_insert_rec(inode, rec); } -} - -static void __ocfs2_extent_map_drop_cleanup(struct rb_node *free_head) -{ - struct rb_node *node; - struct ocfs2_extent_map_entry *ent; - while (free_head) { - node = free_head; - free_head = node->rb_right; + if (extent_flags) + *extent_flags = flags; - ent = rb_entry(node, struct ocfs2_extent_map_entry, - e_node); - kmem_cache_free(ocfs2_em_ent_cachep, ent); - } +out: + brelse(di_bh); + brelse(eb_bh); + return ret; } /* - * Remove all entries past new_clusters, inclusive of an entry that - * contains new_clusters. This is effectively a cache forget. - * - * If you want to also clip the last extent by some number of clusters, - * you need to call ocfs2_extent_map_trunc(). - * This code does not check or modify ip_clusters. + * This expects alloc_sem to be held. The allocation cannot change at + * all while the map is in the process of being updated. */ -int ocfs2_extent_map_drop(struct inode *inode, u32 new_clusters) +int ocfs2_extent_map_get_blocks(struct inode *inode, u64 v_blkno, u64 *p_blkno, + u64 *ret_count, unsigned int *extent_flags) { - struct rb_node *free_head = NULL; - struct ocfs2_extent_map *em = &OCFS2_I(inode)->ip_map; - struct ocfs2_extent_map_entry *ent; - - spin_lock(&OCFS2_I(inode)->ip_lock); + int ret; + int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); + u32 cpos, num_clusters, p_cluster; + u64 boff = 0; - __ocfs2_extent_map_drop(inode, new_clusters, &free_head, &ent); + cpos = ocfs2_blocks_to_clusters(inode->i_sb, v_blkno); - if (ent) { - rb_erase(&ent->e_node, &em->em_extents); - ent->e_node.rb_right = free_head; - free_head = &ent->e_node; + ret = ocfs2_get_clusters(inode, cpos, &p_cluster, &num_clusters, + extent_flags); + if (ret) { + mlog_errno(ret); + goto out; } - spin_unlock(&OCFS2_I(inode)->ip_lock); - - if (free_head) - __ocfs2_extent_map_drop_cleanup(free_head); - - return 0; -} - -/* - * Remove all entries past new_clusters and also clip any extent - * straddling new_clusters, if there is one. This does not check - * or modify ip_clusters - */ -int ocfs2_extent_map_trunc(struct inode *inode, u32 new_clusters) -{ - struct rb_node *free_head = NULL; - struct ocfs2_extent_map_entry *ent = NULL; - - spin_lock(&OCFS2_I(inode)->ip_lock); - - __ocfs2_extent_map_drop(inode, new_clusters, &free_head, &ent); - - if (ent) - ent->e_rec.e_clusters = cpu_to_le32(new_clusters - - le32_to_cpu(ent->e_rec.e_cpos)); - - OCFS2_I(inode)->ip_map.em_clusters = new_clusters; - - spin_unlock(&OCFS2_I(inode)->ip_lock); - - if (free_head) - __ocfs2_extent_map_drop_cleanup(free_head); - - return 0; -} + /* + * p_cluster == 0 indicates a hole. + */ + if (p_cluster) { + boff = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); + boff += (v_blkno & (u64)(bpc - 1)); + } -int __init init_ocfs2_extent_maps(void) -{ - ocfs2_em_ent_cachep = - kmem_cache_create("ocfs2_em_ent", - sizeof(struct ocfs2_extent_map_entry), - 0, SLAB_HWCACHE_ALIGN, NULL, NULL); - if (!ocfs2_em_ent_cachep) - return -ENOMEM; + *p_blkno = boff; - return 0; -} + if (ret_count) { + *ret_count = ocfs2_clusters_to_blocks(inode->i_sb, num_clusters); + *ret_count -= v_blkno & (u64)(bpc - 1); + } -void exit_ocfs2_extent_maps(void) -{ - kmem_cache_destroy(ocfs2_em_ent_cachep); +out: + return ret; } diff --git a/fs/ocfs2/extent_map.h b/fs/ocfs2/extent_map.h index fa3745e..de91e3e 100644 --- a/fs/ocfs2/extent_map.h +++ b/fs/ocfs2/extent_map.h @@ -25,22 +25,29 @@ #ifndef _EXTENT_MAP_H #define _EXTENT_MAP_H -int init_ocfs2_extent_maps(void); -void exit_ocfs2_extent_maps(void); +struct ocfs2_extent_map_item { + unsigned int ei_cpos; + unsigned int ei_phys; + unsigned int ei_clusters; + unsigned int ei_flags; -/* - * EVERY CALL here except _init, _trunc, and _drop expects alloc_sem - * to be held. The allocation cannot change at all while the map is - * in the process of being updated. - */ -int ocfs2_extent_map_init(struct inode *inode); -int ocfs2_extent_map_append(struct inode *inode, - struct ocfs2_extent_rec *rec, - u32 new_clusters); -int ocfs2_extent_map_get_blocks(struct inode *inode, - u64 v_blkno, int count, - u64 *p_blkno, int *ret_count); -int ocfs2_extent_map_drop(struct inode *inode, u32 new_clusters); -int ocfs2_extent_map_trunc(struct inode *inode, u32 new_clusters); + struct list_head ei_list; +}; + +#define OCFS2_MAX_EXTENT_MAP_ITEMS 3 +struct ocfs2_extent_map { + unsigned int em_num_items; + struct list_head em_list; +}; + +void ocfs2_extent_map_init(struct inode *inode); +void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cluster); +void ocfs2_extent_map_insert_rec(struct inode *inode, + struct ocfs2_extent_rec *rec); + +int ocfs2_get_clusters(struct inode *inode, u32 v_cluster, u32 *p_cluster, + u32 *num_clusters, unsigned int *extent_flags); +int ocfs2_extent_map_get_blocks(struct inode *inode, u64 v_blkno, u64 *p_blkno, + u64 *ret_count, unsigned int *extent_flags); #endif /* _EXTENT_MAP_H */ diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index f2cd3bf..520a2a6 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -33,6 +33,7 @@ #include <linux/sched.h> #include <linux/pipe_fs_i.h> #include <linux/mount.h> +#include <linux/writeback.h> #define MLOG_MASK_PREFIX ML_INODE #include <cluster/masklog.h> @@ -215,7 +216,7 @@ int ocfs2_set_inode_size(handle_t *handle, mlog_entry_void(); i_size_write(inode, new_i_size); - inode->i_blocks = ocfs2_align_bytes_to_sectors(new_i_size); + inode->i_blocks = ocfs2_inode_sector_count(inode); inode->i_ctime = inode->i_mtime = CURRENT_TIME; status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); @@ -261,6 +262,7 @@ static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, { int status; handle_t *handle; + struct ocfs2_dinode *di; mlog_entry_void(); @@ -274,12 +276,39 @@ static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, goto out; } - status = ocfs2_set_inode_size(handle, inode, fe_bh, new_i_size); + status = ocfs2_journal_access(handle, inode, fe_bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (status < 0) { + mlog_errno(status); + goto out_commit; + } + + /* + * Do this before setting i_size. + */ + status = ocfs2_zero_tail_for_truncate(inode, handle, new_i_size); + if (status) { + mlog_errno(status); + goto out_commit; + } + + i_size_write(inode, new_i_size); + inode->i_blocks = ocfs2_align_bytes_to_sectors(new_i_size); + inode->i_ctime = inode->i_mtime = CURRENT_TIME; + + di = (struct ocfs2_dinode *) fe_bh->b_data; + di->i_size = cpu_to_le64(new_i_size); + di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec); + di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); + + status = ocfs2_journal_dirty(handle, fe_bh); if (status < 0) mlog_errno(status); +out_commit: ocfs2_commit_trans(osb, handle); out: + mlog_exit(status); return status; } @@ -342,19 +371,6 @@ static int ocfs2_truncate_file(struct inode *inode, mlog_errno(status); goto bail; } - ocfs2_data_unlock(inode, 1); - - if (le32_to_cpu(fe->i_clusters) == - ocfs2_clusters_for_bytes(osb->sb, new_i_size)) { - mlog(0, "fe->i_clusters = %u, so we do a simple truncate\n", - fe->i_clusters); - /* No allocation change is required, so lets fast path - * this truncate. */ - status = ocfs2_simple_size_update(inode, di_bh, new_i_size); - if (status < 0) - mlog_errno(status); - goto bail; - } /* alright, we're going to need to do a full blown alloc size * change. Orphan the inode so that recovery can complete the @@ -363,22 +379,25 @@ static int ocfs2_truncate_file(struct inode *inode, status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); if (status < 0) { mlog_errno(status); - goto bail; + goto bail_unlock_data; } status = ocfs2_prepare_truncate(osb, inode, di_bh, &tc); if (status < 0) { mlog_errno(status); - goto bail; + goto bail_unlock_data; } status = ocfs2_commit_truncate(osb, inode, di_bh, tc); if (status < 0) { mlog_errno(status); - goto bail; + goto bail_unlock_data; } /* TODO: orphan dir cleanup here. */ +bail_unlock_data: + ocfs2_data_unlock(inode, 1); + bail: mlog_exit(status); @@ -397,6 +416,7 @@ bail: */ int ocfs2_do_extend_allocation(struct ocfs2_super *osb, struct inode *inode, + u32 *logical_offset, u32 clusters_to_add, struct buffer_head *fe_bh, handle_t *handle, @@ -460,18 +480,14 @@ int ocfs2_do_extend_allocation(struct ocfs2_super *osb, block = ocfs2_clusters_to_blocks(osb->sb, bit_off); mlog(0, "Allocating %u clusters at block %u for inode %llu\n", num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); - status = ocfs2_insert_extent(osb, handle, inode, fe_bh, block, - num_bits, meta_ac); + status = ocfs2_insert_extent(osb, handle, inode, fe_bh, + *logical_offset, block, num_bits, + meta_ac); if (status < 0) { mlog_errno(status); goto leave; } - le32_add_cpu(&fe->i_clusters, num_bits); - spin_lock(&OCFS2_I(inode)->ip_lock); - OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); - spin_unlock(&OCFS2_I(inode)->ip_lock); - status = ocfs2_journal_dirty(handle, fe_bh); if (status < 0) { mlog_errno(status); @@ -479,6 +495,7 @@ int ocfs2_do_extend_allocation(struct ocfs2_super *osb, } clusters_to_add -= num_bits; + *logical_offset += num_bits; if (clusters_to_add) { mlog(0, "need to alloc once more, clusters = %u, wanted = " @@ -494,14 +511,87 @@ leave: return status; } +/* + * 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. + */ +int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_dinode *di, + u32 clusters_to_add, + struct ocfs2_alloc_context **data_ac, + struct ocfs2_alloc_context **meta_ac) +{ + int ret, num_free_extents; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + + *meta_ac = NULL; + *data_ac = NULL; + + mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, " + "clusters_to_add = %u\n", + (unsigned long long)OCFS2_I(inode)->ip_blkno, i_size_read(inode), + le32_to_cpu(di->i_clusters), clusters_to_add); + + num_free_extents = ocfs2_num_free_extents(osb, inode, di); + if (num_free_extents < 0) { + ret = num_free_extents; + mlog_errno(ret); + goto out; + } + + /* + * Sparse allocation file systems need to be more conservative + * with reserving room for expansion - the actual allocation + * happens while we've got a journal handle open so re-taking + * a cluster lock (because we ran out of room for another + * extent) will violate ordering rules. + * + * Most of the time we'll only be seeing this 1 cluster at a time + * anyway. + */ + if (!num_free_extents || + (ocfs2_sparse_alloc(osb) && num_free_extents < clusters_to_add)) { + ret = ocfs2_reserve_new_metadata(osb, di, meta_ac); + if (ret < 0) { + if (ret != -ENOSPC) + mlog_errno(ret); + goto out; + } + } + + ret = ocfs2_reserve_clusters(osb, clusters_to_add, data_ac); + if (ret < 0) { + if (ret != -ENOSPC) + mlog_errno(ret); + goto out; + } + +out: + if (ret) { + if (*meta_ac) { + ocfs2_free_alloc_context(*meta_ac); + *meta_ac = NULL; + } + + /* + * We cannot have an error and a non null *data_ac. + */ + } + + return ret; +} + static int ocfs2_extend_allocation(struct inode *inode, u32 clusters_to_add) { int status = 0; int restart_func = 0; int drop_alloc_sem = 0; - int credits, num_free_extents; - u32 prev_clusters; + int credits; + u32 prev_clusters, logical_start; struct buffer_head *bh = NULL; struct ocfs2_dinode *fe = NULL; handle_t *handle = NULL; @@ -512,6 +602,12 @@ static int ocfs2_extend_allocation(struct inode *inode, mlog_entry("(clusters_to_add = %u)\n", clusters_to_add); + /* + * This function only exists for file systems which don't + * support holes. + */ + BUG_ON(ocfs2_sparse_alloc(osb)); + status = ocfs2_read_block(osb, OCFS2_I(inode)->ip_blkno, &bh, OCFS2_BH_CACHED, inode); if (status < 0) { @@ -526,39 +622,11 @@ 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); - mlog(0, "extend inode %llu, i_size = %lld, fe->i_clusters = %u, " - "clusters_to_add = %u\n", - (unsigned long long)OCFS2_I(inode)->ip_blkno, i_size_read(inode), - fe->i_clusters, clusters_to_add); - - num_free_extents = ocfs2_num_free_extents(osb, - inode, - fe); - if (num_free_extents < 0) { - status = num_free_extents; - mlog_errno(status); - goto leave; - } - - if (!num_free_extents) { - status = ocfs2_reserve_new_metadata(osb, fe, &meta_ac); - if (status < 0) { - if (status != -ENOSPC) - mlog_errno(status); - goto leave; - } - } - - status = ocfs2_reserve_clusters(osb, clusters_to_add, &data_ac); - if (status < 0) { - if (status != -ENOSPC) - mlog_errno(status); - goto leave; - } - /* 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 @@ -566,6 +634,13 @@ restart_all: down_write(&OCFS2_I(inode)->ip_alloc_sem); drop_alloc_sem = 1; + status = ocfs2_lock_allocators(inode, fe, clusters_to_add, &data_ac, + &meta_ac); + if (status) { + mlog_errno(status); + goto leave; + } + credits = ocfs2_calc_extend_credits(osb->sb, fe, clusters_to_add); handle = ocfs2_start_trans(osb, credits); if (IS_ERR(handle)) { @@ -590,6 +665,7 @@ restarted_transaction: status = ocfs2_do_extend_allocation(osb, inode, + &logical_start, clusters_to_add, bh, handle, @@ -778,7 +854,7 @@ static int ocfs2_extend_file(struct inode *inode, size_t tail_to_skip) { int ret = 0; - u32 clusters_to_add; + u32 clusters_to_add = 0; BUG_ON(!tail_to_skip && !di_bh); @@ -790,6 +866,11 @@ static int ocfs2_extend_file(struct inode *inode, goto out; BUG_ON(new_i_size < i_size_read(inode)); + if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) { + BUG_ON(tail_to_skip != 0); + goto out_update_size; + } + clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size) - OCFS2_I(inode)->ip_clusters; @@ -825,6 +906,7 @@ static int ocfs2_extend_file(struct inode *inode, goto out_unlock; } +out_update_size: if (!tail_to_skip) { /* We're being called from ocfs2_setattr() which wants * us to update i_size */ @@ -834,7 +916,8 @@ static int ocfs2_extend_file(struct inode *inode, } out_unlock: - ocfs2_data_unlock(inode, 1); + if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) + ocfs2_data_unlock(inode, 1); out: return ret; @@ -972,7 +1055,8 @@ int ocfs2_permission(struct inode *inode, int mask, struct nameidata *nd) ret = ocfs2_meta_lock(inode, NULL, 0); if (ret) { - mlog_errno(ret); + if (ret != -ENOENT) + mlog_errno(ret); goto out; } @@ -1035,10 +1119,49 @@ out: return ret; } +/* + * Will look for holes and unwritten extents in the range starting at + * pos for count bytes (inclusive). + */ +static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos, + size_t count) +{ + int ret = 0; + unsigned int extent_flags; + u32 cpos, clusters, extent_len, phys_cpos; + struct super_block *sb = inode->i_sb; + + cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; + clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; + + while (clusters) { + ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, + &extent_flags); + if (ret < 0) { + mlog_errno(ret); + goto out; + } + + if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) { + ret = 1; + break; + } + + if (extent_len > clusters) + extent_len = clusters; + + clusters -= extent_len; + cpos += extent_len; + } +out: + return ret; +} + static int ocfs2_prepare_inode_for_write(struct dentry *dentry, loff_t *ppos, size_t count, - int appending) + int appending, + int *direct_io) { int ret = 0, meta_level = appending; struct inode *inode = dentry->d_inode; @@ -1089,6 +1212,49 @@ static int ocfs2_prepare_inode_for_write(struct dentry *dentry, } else { saved_pos = *ppos; } + + if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) { + loff_t end = saved_pos + count; + + /* + * Skip the O_DIRECT checks if we don't need + * them. + */ + if (!direct_io || !(*direct_io)) + break; + + /* + * Allowing concurrent direct writes means + * i_size changes wouldn't be synchronized, so + * one node could wind up truncating another + * nodes writes. + */ + if (end > i_size_read(inode)) { + *direct_io = 0; + break; + } + + /* + * We don't fill holes during direct io, so + * check for them here. If any are found, the + * caller will have to retake some cluster + * locks and initiate the io as buffered. + */ + ret = ocfs2_check_range_for_holes(inode, saved_pos, + count); + if (ret == 1) { + *direct_io = 0; + ret = 0; + } else if (ret < 0) + mlog_errno(ret); + break; + } + + /* + * The rest of this loop is concerned with legacy file + * systems which don't support sparse files. + */ + newsize = count + saved_pos; mlog(0, "pos=%lld newsize=%lld cursize=%lld\n", @@ -1141,55 +1307,264 @@ out: return ret; } +static inline void +ocfs2_set_next_iovec(const struct iovec **iovp, size_t *basep, size_t bytes) +{ + const struct iovec *iov = *iovp; + size_t base = *basep; + + do { + int copy = min(bytes, iov->iov_len - base); + + bytes -= copy; + base += copy; + if (iov->iov_len == base) { + iov++; + base = 0; + } + } while (bytes); + *iovp = iov; + *basep = base; +} + +static struct page * ocfs2_get_write_source(struct ocfs2_buffered_write_priv *bp, + const struct iovec *cur_iov, + size_t iov_offset) +{ + int ret; + char *buf; + struct page *src_page = NULL; + + buf = cur_iov->iov_base + iov_offset; + + if (!segment_eq(get_fs(), KERNEL_DS)) { + /* + * Pull in the user page. We want to do this outside + * of the meta data locks in order to preserve locking + * order in case of page fault. + */ + ret = get_user_pages(current, current->mm, + (unsigned long)buf & PAGE_CACHE_MASK, 1, + 0, 0, &src_page, NULL); + if (ret == 1) + bp->b_src_buf = kmap(src_page); + else + src_page = ERR_PTR(-EFAULT); + } else { + bp->b_src_buf = buf; + } + + return src_page; +} + +static void ocfs2_put_write_source(struct ocfs2_buffered_write_priv *bp, + struct page *page) +{ + if (page) { + kunmap(page); + page_cache_release(page); + } +} + +static ssize_t ocfs2_file_buffered_write(struct file *file, loff_t *ppos, + const struct iovec *iov, + unsigned long nr_segs, + size_t count, + ssize_t o_direct_written) +{ + int ret = 0; + ssize_t copied, total = 0; + size_t iov_offset = 0; + const struct iovec *cur_iov = iov; + struct ocfs2_buffered_write_priv bp; + struct page *page; + + /* + * handle partial DIO write. Adjust cur_iov if needed. + */ + ocfs2_set_next_iovec(&cur_iov, &iov_offset, o_direct_written); + + do { + bp.b_cur_off = iov_offset; + bp.b_cur_iov = cur_iov; + + page = ocfs2_get_write_source(&bp, cur_iov, iov_offset); + if (IS_ERR(page)) { + ret = PTR_ERR(page); + goto out; + } + + copied = ocfs2_buffered_write_cluster(file, *ppos, count, + ocfs2_map_and_write_user_data, + &bp); + + ocfs2_put_write_source(&bp, page); + + if (copied < 0) { + mlog_errno(copied); + ret = copied; + goto out; + } + + total += copied; + *ppos = *ppos + copied; + count -= copied; + + ocfs2_set_next_iovec(&cur_iov, &iov_offset, copied); + } while(count); + +out: + return total ? total : ret; +} + +static int ocfs2_check_iovec(const struct iovec *iov, size_t *counted, + unsigned long *nr_segs) +{ + size_t ocount; /* original count */ + unsigned long seg; + + ocount = 0; + for (seg = 0; seg < *nr_segs; seg++) { + const struct iovec *iv = &iov[seg]; + + /* + * If any segment has a negative length, or the cumulative + * length ever wraps negative then return -EINVAL. + */ + ocount += iv->iov_len; + if (unlikely((ssize_t)(ocount|iv->iov_len) < 0)) + return -EINVAL; + if (access_ok(VERIFY_READ, iv->iov_base, iv->iov_len)) + continue; + if (seg == 0) + return -EFAULT; + *nr_segs = seg; + ocount -= iv->iov_len; /* This segment is no good */ + break; + } + + *counted = ocount; + return 0; +} + static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, loff_t pos) { - int ret, rw_level, have_alloc_sem = 0; - struct file *filp = iocb->ki_filp; - struct inode *inode = filp->f_path.dentry->d_inode; - int appending = filp->f_flags & O_APPEND ? 1 : 0; - - mlog_entry("(0x%p, %u, '%.*s')\n", filp, + int ret, direct_io, appending, rw_level, have_alloc_sem = 0; + int can_do_direct, sync = 0; + ssize_t written = 0; + size_t ocount; /* original count */ + size_t count; /* after file limit checks */ + loff_t *ppos = &iocb->ki_pos; + struct file *file = iocb->ki_filp; + struct inode *inode = file->f_path.dentry->d_inode; + + mlog_entry("(0x%p, %u, '%.*s')\n", file, (unsigned int)nr_segs, - filp->f_path.dentry->d_name.len, - filp->f_path.dentry->d_name.name); + file->f_path.dentry->d_name.len, + file->f_path.dentry->d_name.name); - /* happy write of zero bytes */ if (iocb->ki_left == 0) return 0; + ret = ocfs2_check_iovec(iov, &ocount, &nr_segs); + if (ret) + return ret; + + count = ocount; + + vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); + + appending = file->f_flags & O_APPEND ? 1 : 0; + direct_io = file->f_flags & O_DIRECT ? 1 : 0; + mutex_lock(&inode->i_mutex); + +relock: /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */ - if (filp->f_flags & O_DIRECT) { - have_alloc_sem = 1; + if (direct_io) { down_read(&inode->i_alloc_sem); + have_alloc_sem = 1; } /* concurrent O_DIRECT writes are allowed */ - rw_level = (filp->f_flags & O_DIRECT) ? 0 : 1; + rw_level = !direct_io; ret = ocfs2_rw_lock(inode, rw_level); if (ret < 0) { - rw_level = -1; mlog_errno(ret); - goto out; + goto out_sems; } - ret = ocfs2_prepare_inode_for_write(filp->f_path.dentry, &iocb->ki_pos, - iocb->ki_left, appending); + can_do_direct = direct_io; + ret = ocfs2_prepare_inode_for_write(file->f_path.dentry, ppos, + iocb->ki_left, appending, + &can_do_direct); if (ret < 0) { mlog_errno(ret); goto out; } - /* communicate with ocfs2_dio_end_io */ - ocfs2_iocb_set_rw_locked(iocb); + /* + * We can't complete the direct I/O as requested, fall back to + * buffered I/O. + */ + if (direct_io && !can_do_direct) { + ocfs2_rw_unlock(inode, rw_level); + up_read(&inode->i_alloc_sem); + + have_alloc_sem = 0; + rw_level = -1; - ret = generic_file_aio_write_nolock(iocb, iov, nr_segs, iocb->ki_pos); + direct_io = 0; + sync = 1; + goto relock; + } + + if (!sync && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) + sync = 1; + + /* + * XXX: Is it ok to execute these checks a second time? + */ + ret = generic_write_checks(file, ppos, &count, S_ISBLK(inode->i_mode)); + if (ret) + goto out; + + /* + * Set pos so that sync_page_range_nolock() below understands + * where to start from. We might've moved it around via the + * calls above. The range we want to actually sync starts from + * *ppos here. + * + */ + pos = *ppos; + + /* communicate with ocfs2_dio_end_io */ + ocfs2_iocb_set_rw_locked(iocb, rw_level); + + if (direct_io) { + written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos, + ppos, count, ocount); + if (written < 0) { + ret = written; + goto out_dio; + } + } else { + written = ocfs2_file_buffered_write(file, ppos, iov, nr_segs, + count, written); + if (written < 0) { + ret = written; + if (ret != -EFAULT || ret != -ENOSPC) + mlog_errno(ret); + goto out; + } + } +out_dio: /* buffered aio wouldn't have proper lock coverage today */ - BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT)); + BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT)); /* * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io @@ -1207,13 +1582,102 @@ static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, } out: + if (rw_level != -1) + ocfs2_rw_unlock(inode, rw_level); + +out_sems: if (have_alloc_sem) up_read(&inode->i_alloc_sem); - if (rw_level != -1) - ocfs2_rw_unlock(inode, rw_level); + + if (written > 0 && sync) { + ssize_t err; + + err = sync_page_range_nolock(inode, file->f_mapping, pos, count); + if (err < 0) + written = err; + } + mutex_unlock(&inode->i_mutex); mlog_exit(ret); + return written ? written : ret; +} + +static int ocfs2_splice_write_actor(struct pipe_inode_info *pipe, + struct pipe_buffer *buf, + struct splice_desc *sd) +{ + int ret, count, total = 0; + ssize_t copied = 0; + struct ocfs2_splice_write_priv sp; + + ret = buf->ops->pin(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; + + count = sd->len; + if (count + sp.s_offset > PAGE_CACHE_SIZE) + count = PAGE_CACHE_SIZE - sp.s_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; + } + + count -= copied; + sp.s_offset += copied; + sp.s_buf_offset += copied; + total += copied; + } while (count); + + ret = 0; +out: + + return total ? total : ret; +} + +static ssize_t __ocfs2_file_splice_write(struct pipe_inode_info *pipe, + struct file *out, + loff_t *ppos, + size_t len, + unsigned int flags) +{ + 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); + if (ret > 0) { + *ppos += ret; + + if (unlikely((out->f_flags & O_SYNC) || IS_SYNC(inode))) { + err = generic_osync_inode(inode, mapping, + OSYNC_METADATA|OSYNC_DATA); + if (err) + ret = err; + } + } + return ret; } @@ -1239,14 +1703,15 @@ static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, goto out; } - ret = ocfs2_prepare_inode_for_write(out->f_path.dentry, ppos, len, 0); + ret = ocfs2_prepare_inode_for_write(out->f_path.dentry, ppos, len, 0, + NULL); if (ret < 0) { mlog_errno(ret); goto out_unlock; } /* ok, we're done with i_size and alloc work */ - ret = generic_file_splice_write_nolock(pipe, out, ppos, len, flags); + ret = __ocfs2_file_splice_write(pipe, out, ppos, len, flags); out_unlock: ocfs2_rw_unlock(inode, 1); @@ -1323,7 +1788,7 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, } rw_level = 0; /* communicate with ocfs2_dio_end_io */ - ocfs2_iocb_set_rw_locked(iocb); + ocfs2_iocb_set_rw_locked(iocb, rw_level); } /* diff --git a/fs/ocfs2/file.h b/fs/ocfs2/file.h index cc973f0..2c4460f 100644 --- a/fs/ocfs2/file.h +++ b/fs/ocfs2/file.h @@ -39,12 +39,17 @@ enum ocfs2_alloc_restarted { }; int ocfs2_do_extend_allocation(struct ocfs2_super *osb, struct inode *inode, + u32 *cluster_start, u32 clusters_to_add, 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); +int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_dinode *di, + u32 clusters_to_add, + struct ocfs2_alloc_context **data_ac, + struct ocfs2_alloc_context **meta_ac); int ocfs2_setattr(struct dentry *dentry, struct iattr *attr); int ocfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c index 28ab56f..21a6050 100644 --- a/fs/ocfs2/inode.c +++ b/fs/ocfs2/inode.c @@ -89,24 +89,6 @@ void ocfs2_set_inode_flags(struct inode *inode) inode->i_flags |= S_DIRSYNC; } -struct inode *ocfs2_ilookup_for_vote(struct ocfs2_super *osb, - u64 blkno, - int delete_vote) -{ - struct ocfs2_find_inode_args args; - - /* ocfs2_ilookup_for_vote should *only* be called from the - * vote thread */ - BUG_ON(current != osb->vote_task); - - args.fi_blkno = blkno; - args.fi_flags = OCFS2_FI_FLAG_NOWAIT; - if (delete_vote) - args.fi_flags |= OCFS2_FI_FLAG_DELETE; - args.fi_ino = ino_from_blkno(osb->sb, blkno); - return ilookup5(osb->sb, args.fi_ino, ocfs2_find_actor, &args); -} - struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, int flags) { struct inode *inode = NULL; @@ -182,28 +164,6 @@ static int ocfs2_find_actor(struct inode *inode, void *opaque) if (oi->ip_blkno != args->fi_blkno) goto bail; - /* OCFS2_FI_FLAG_NOWAIT is *only* set from - * ocfs2_ilookup_for_vote which won't create an inode for one - * that isn't found. The vote thread which doesn't want to get - * an inode which is in the process of going away - otherwise - * the call to __wait_on_freeing_inode in find_inode_fast will - * cause it to deadlock on an inode which may be waiting on a - * vote (or lock release) in delete_inode */ - if ((args->fi_flags & OCFS2_FI_FLAG_NOWAIT) && - (inode->i_state & (I_FREEING|I_CLEAR))) { - /* As stated above, we're not going to return an - * inode. In the case of a delete vote, the voting - * code is going to signal the other node to go - * ahead. Mark that state here, so this freeing inode - * has the state when it gets to delete_inode. */ - if (args->fi_flags & OCFS2_FI_FLAG_DELETE) { - spin_lock(&oi->ip_lock); - ocfs2_mark_inode_remotely_deleted(inode); - spin_unlock(&oi->ip_lock); - } - goto bail; - } - ret = 1; bail: mlog_exit(ret); @@ -261,6 +221,9 @@ int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, goto bail; } + OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); + OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr); + inode->i_version = 1; inode->i_generation = le32_to_cpu(fe->i_generation); inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev)); @@ -272,8 +235,7 @@ int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, if (S_ISLNK(inode->i_mode) && !fe->i_clusters) inode->i_blocks = 0; else - inode->i_blocks = - ocfs2_align_bytes_to_sectors(le64_to_cpu(fe->i_size)); + inode->i_blocks = ocfs2_inode_sector_count(inode); inode->i_mapping->a_ops = &ocfs2_aops; inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime); inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec); @@ -288,10 +250,6 @@ int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, (unsigned long long)OCFS2_I(inode)->ip_blkno, (unsigned long long)fe->i_blkno); - OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); - OCFS2_I(inode)->ip_orphaned_slot = OCFS2_INVALID_SLOT; - OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr); - inode->i_nlink = le16_to_cpu(fe->i_links_count); if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) @@ -347,6 +305,9 @@ int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres, OCFS2_LOCK_TYPE_META, 0, inode); + + ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres, + OCFS2_LOCK_TYPE_OPEN, 0, inode); } ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres, @@ -421,7 +382,7 @@ static int ocfs2_read_locked_inode(struct inode *inode, * cluster lock before trusting anything anyway. */ can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE) - && !(args->fi_flags & OCFS2_FI_FLAG_NOLOCK) + && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) && !ocfs2_mount_local(osb); /* @@ -438,7 +399,17 @@ static int ocfs2_read_locked_inode(struct inode *inode, OCFS2_LOCK_TYPE_META, generation, inode); + ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres, + OCFS2_LOCK_TYPE_OPEN, + 0, inode); + if (can_lock) { + status = ocfs2_open_lock(inode); + if (status) { + make_bad_inode(inode); + mlog_errno(status); + return status; + } status = ocfs2_meta_lock(inode, NULL, 0); if (status) { make_bad_inode(inode); @@ -447,6 +418,14 @@ static int ocfs2_read_locked_inode(struct inode *inode, } } + if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) { + status = ocfs2_try_open_lock(inode, 0); + if (status) { + make_bad_inode(inode); + return status; + } + } + status = ocfs2_read_block(osb, args->fi_blkno, &bh, 0, can_lock ? inode : NULL); if (status < 0) { @@ -507,50 +486,56 @@ static int ocfs2_truncate_for_delete(struct ocfs2_super *osb, struct buffer_head *fe_bh) { int status = 0; - handle_t *handle = NULL; struct ocfs2_truncate_context *tc = NULL; struct ocfs2_dinode *fe; + handle_t *handle = NULL; mlog_entry_void(); fe = (struct ocfs2_dinode *) fe_bh->b_data; - /* zero allocation, zero truncate :) */ - if (!fe->i_clusters) - goto bail; + if (fe->i_clusters) { + handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); + if (IS_ERR(handle)) { + status = PTR_ERR(handle); + mlog_errno(status); + goto out; + } - handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); - if (IS_ERR(handle)) { - status = PTR_ERR(handle); - handle = NULL; - mlog_errno(status); - goto bail; - } + status = ocfs2_journal_access(handle, inode, fe_bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (status < 0) { + mlog_errno(status); + goto out; + } - status = ocfs2_set_inode_size(handle, inode, fe_bh, 0ULL); - if (status < 0) { - mlog_errno(status); - goto bail; - } + i_size_write(inode, 0); - ocfs2_commit_trans(osb, handle); - handle = NULL; + status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); + if (status < 0) { + mlog_errno(status); + goto out; + } - status = ocfs2_prepare_truncate(osb, inode, fe_bh, &tc); - if (status < 0) { - mlog_errno(status); - goto bail; - } + ocfs2_commit_trans(osb, handle); + handle = NULL; - status = ocfs2_commit_truncate(osb, inode, fe_bh, tc); - if (status < 0) { - mlog_errno(status); - goto bail; + status = ocfs2_prepare_truncate(osb, inode, fe_bh, &tc); + if (status < 0) { + mlog_errno(status); + goto out; + } + + status = ocfs2_commit_truncate(osb, inode, fe_bh, tc); + if (status < 0) { + mlog_errno(status); + goto out; + } } -bail: + +out: if (handle) ocfs2_commit_trans(osb, handle); - mlog_exit(status); return status; } @@ -678,10 +663,10 @@ static int ocfs2_wipe_inode(struct inode *inode, struct inode *orphan_dir_inode = NULL; struct buffer_head *orphan_dir_bh = NULL; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct ocfs2_dinode *di; - /* We've already voted on this so it should be readonly - no - * spinlock needed. */ - orphaned_slot = OCFS2_I(inode)->ip_orphaned_slot; + di = (struct ocfs2_dinode *) di_bh->b_data; + orphaned_slot = le16_to_cpu(di->i_orphaned_slot); status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot); if (status) @@ -839,11 +824,20 @@ static int ocfs2_query_inode_wipe(struct inode *inode, goto bail; } - status = ocfs2_request_delete_vote(inode); - /* -EBUSY means that other nodes are still using the - * inode. We're done here though, so avoid doing anything on - * disk and let them worry about deleting it. */ - if (status == -EBUSY) { + /* + * This is how ocfs2 determines whether an inode is still live + * within the cluster. Every node takes a shared read lock on + * the inode open lock in ocfs2_read_locked_inode(). When we + * get to ->delete_inode(), each node tries to convert it's + * lock to an exclusive. Trylocks are serialized by the inode + * meta data lock. If the upconvert suceeds, we know the inode + * is no longer live and can be deleted. + * + * Though we call this with the meta data lock held, the + * trylock keeps us from ABBA deadlock. + */ + status = ocfs2_try_open_lock(inode, 1); + if (status == -EAGAIN) { status = 0; mlog(0, "Skipping delete of %llu because it is in use on" "other nodes\n", (unsigned long long)oi->ip_blkno); @@ -854,21 +848,10 @@ static int ocfs2_query_inode_wipe(struct inode *inode, goto bail; } - spin_lock(&oi->ip_lock); - if (oi->ip_orphaned_slot == OCFS2_INVALID_SLOT) { - /* Nobody knew which slot this inode was orphaned - * into. This may happen during node death and - * recovery knows how to clean it up so we can safely - * ignore this inode for now on. */ - mlog(0, "Nobody knew where inode %llu was orphaned!\n", - (unsigned long long)oi->ip_blkno); - } else { - *wipe = 1; - - mlog(0, "Inode %llu is ok to wipe from orphan dir %d\n", - (unsigned long long)oi->ip_blkno, oi->ip_orphaned_slot); - } - spin_unlock(&oi->ip_lock); + *wipe = 1; + mlog(0, "Inode %llu is ok to wipe from orphan dir %u\n", + (unsigned long long)oi->ip_blkno, + le16_to_cpu(di->i_orphaned_slot)); bail: return status; @@ -1001,11 +984,16 @@ void ocfs2_clear_inode(struct inode *inode) mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL, "Inode=%lu\n", inode->i_ino); + /* For remove delete_inode vote, we hold open lock before, + * now it is time to unlock PR and EX open locks. */ + ocfs2_open_unlock(inode); + /* Do these before all the other work so that we don't bounce * the vote thread while waiting to destroy the locks. */ ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres); ocfs2_mark_lockres_freeing(&oi->ip_meta_lockres); ocfs2_mark_lockres_freeing(&oi->ip_data_lockres); + ocfs2_mark_lockres_freeing(&oi->ip_open_lockres); /* We very well may get a clear_inode before all an inodes * metadata has hit disk. Of course, we can't drop any cluster @@ -1020,8 +1008,7 @@ void ocfs2_clear_inode(struct inode *inode) "Clear inode of %llu, inode has io markers\n", (unsigned long long)oi->ip_blkno); - ocfs2_extent_map_drop(inode, 0); - ocfs2_extent_map_init(inode); + ocfs2_extent_map_trunc(inode, 0); status = ocfs2_drop_inode_locks(inode); if (status < 0) @@ -1030,6 +1017,7 @@ void ocfs2_clear_inode(struct inode *inode) ocfs2_lock_res_free(&oi->ip_rw_lockres); ocfs2_lock_res_free(&oi->ip_meta_lockres); ocfs2_lock_res_free(&oi->ip_data_lockres); + ocfs2_lock_res_free(&oi->ip_open_lockres); ocfs2_metadata_cache_purge(inode); @@ -1086,9 +1074,6 @@ void ocfs2_drop_inode(struct inode *inode) mlog(0, "Drop inode %llu, nlink = %u, ip_flags = 0x%x\n", (unsigned long long)oi->ip_blkno, inode->i_nlink, oi->ip_flags); - /* Testing ip_orphaned_slot here wouldn't work because we may - * not have gotten a delete_inode vote from any other nodes - * yet. */ if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED) generic_delete_inode(inode); else @@ -1121,8 +1106,8 @@ struct buffer_head *ocfs2_bread(struct inode *inode, return NULL; } - tmperr = ocfs2_extent_map_get_blocks(inode, block, 1, - &p_blkno, NULL); + tmperr = ocfs2_extent_map_get_blocks(inode, block, &p_blkno, NULL, + NULL); if (tmperr < 0) { mlog_errno(tmperr); goto fail; @@ -1259,7 +1244,7 @@ void ocfs2_refresh_inode(struct inode *inode, if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0) inode->i_blocks = 0; else - inode->i_blocks = ocfs2_align_bytes_to_sectors(i_size_read(inode)); + inode->i_blocks = ocfs2_inode_sector_count(inode); inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime); inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec); inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime); diff --git a/fs/ocfs2/inode.h b/fs/ocfs2/inode.h index 1a7dd29..03ae075 100644 --- a/fs/ocfs2/inode.h +++ b/fs/ocfs2/inode.h @@ -26,6 +26,8 @@ #ifndef OCFS2_INODE_H #define OCFS2_INODE_H +#include "extent_map.h" + /* OCFS2 Inode Private Data */ struct ocfs2_inode_info { @@ -34,6 +36,7 @@ struct ocfs2_inode_info struct ocfs2_lock_res ip_rw_lockres; struct ocfs2_lock_res ip_meta_lockres; struct ocfs2_lock_res ip_data_lockres; + struct ocfs2_lock_res ip_open_lockres; /* protects allocation changes on this inode. */ struct rw_semaphore ip_alloc_sem; @@ -42,9 +45,7 @@ struct ocfs2_inode_info spinlock_t ip_lock; u32 ip_open_count; u32 ip_clusters; - struct ocfs2_extent_map ip_map; struct list_head ip_io_markers; - int ip_orphaned_slot; struct mutex ip_io_mutex; @@ -64,6 +65,8 @@ struct ocfs2_inode_info struct ocfs2_caching_info ip_metadata_cache; + struct ocfs2_extent_map ip_extent_map; + struct inode vfs_inode; }; @@ -117,14 +120,9 @@ void ocfs2_delete_inode(struct inode *inode); void ocfs2_drop_inode(struct inode *inode); /* Flags for ocfs2_iget() */ -#define OCFS2_FI_FLAG_NOWAIT 0x1 -#define OCFS2_FI_FLAG_DELETE 0x2 -#define OCFS2_FI_FLAG_SYSFILE 0x4 -#define OCFS2_FI_FLAG_NOLOCK 0x8 +#define OCFS2_FI_FLAG_SYSFILE 0x4 +#define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x8 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, int flags); -struct inode *ocfs2_ilookup_for_vote(struct ocfs2_super *osb, - u64 blkno, - int delete_vote); int ocfs2_inode_init_private(struct inode *inode); int ocfs2_inode_revalidate(struct dentry *dentry); int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe, @@ -144,4 +142,11 @@ int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb); void ocfs2_set_inode_flags(struct inode *inode); +static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode) +{ + int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9; + + return (blkcnt_t)(OCFS2_I(inode)->ip_clusters << c_to_s_bits); +} + #endif /* OCFS2_INODE_H */ diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c index 825cb0a..5a8a90d 100644 --- a/fs/ocfs2/journal.c +++ b/fs/ocfs2/journal.c @@ -649,29 +649,20 @@ bail: static int ocfs2_force_read_journal(struct inode *inode) { int status = 0; - int i, p_blocks; - u64 v_blkno, p_blkno; -#define CONCURRENT_JOURNAL_FILL 32 + int i; + u64 v_blkno, p_blkno, p_blocks, num_blocks; +#define CONCURRENT_JOURNAL_FILL 32ULL struct buffer_head *bhs[CONCURRENT_JOURNAL_FILL]; mlog_entry_void(); - BUG_ON(inode->i_blocks != - ocfs2_align_bytes_to_sectors(i_size_read(inode))); - memset(bhs, 0, sizeof(struct buffer_head *) * CONCURRENT_JOURNAL_FILL); - mlog(0, "Force reading %llu blocks\n", - (unsigned long long)(inode->i_blocks >> - (inode->i_sb->s_blocksize_bits - 9))); - + num_blocks = ocfs2_blocks_for_bytes(inode->i_sb, inode->i_size); v_blkno = 0; - while (v_blkno < - (inode->i_blocks >> (inode->i_sb->s_blocksize_bits - 9))) { - + while (v_blkno < num_blocks) { status = ocfs2_extent_map_get_blocks(inode, v_blkno, - 1, &p_blkno, - &p_blocks); + &p_blkno, &p_blocks, NULL); if (status < 0) { mlog_errno(status); goto bail; @@ -1306,7 +1297,7 @@ static int ocfs2_queue_orphans(struct ocfs2_super *osb, continue; iter = ocfs2_iget(osb, le64_to_cpu(de->inode), - OCFS2_FI_FLAG_NOLOCK); + OCFS2_FI_FLAG_ORPHAN_RECOVERY); if (IS_ERR(iter)) continue; @@ -1418,7 +1409,6 @@ static int ocfs2_recover_orphans(struct ocfs2_super *osb, /* Set the proper information to get us going into * ocfs2_delete_inode. */ oi->ip_flags |= OCFS2_INODE_MAYBE_ORPHANED; - oi->ip_orphaned_slot = slot; spin_unlock(&oi->ip_lock); iput(inode); diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h index d026b4f..3db5de4 100644 --- a/fs/ocfs2/journal.h +++ b/fs/ocfs2/journal.h @@ -390,7 +390,7 @@ static inline int ocfs2_calc_tree_trunc_credits(struct super_block *sb, /* We may be deleting metadata blocks, so metadata alloc dinode + one desc. block for each possible delete. */ if (tree_depth && next_free == 1 && - le32_to_cpu(last_el->l_recs[i].e_clusters) == clusters_to_del) + ocfs2_rec_clusters(last_el, &last_el->l_recs[i]) == clusters_to_del) credits += 1 + tree_depth; /* update to the truncate log. */ diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c index 51b0204..af01158 100644 --- a/fs/ocfs2/mmap.c +++ b/fs/ocfs2/mmap.c @@ -85,8 +85,11 @@ int ocfs2_mmap(struct file *file, struct vm_area_struct *vma) int ret = 0, lock_level = 0; struct ocfs2_super *osb = OCFS2_SB(file->f_dentry->d_inode->i_sb); - /* We don't want to support shared writable mappings yet. */ - if (!ocfs2_mount_local(osb) && + /* + * Only support shared writeable mmap for local mounts which + * don't know about holes. + */ + 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); diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c index 28dd757..2bcf353 100644 --- a/fs/ocfs2/namei.c +++ b/fs/ocfs2/namei.c @@ -175,8 +175,6 @@ static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0); if (IS_ERR(inode)) { - mlog(ML_ERROR, "Unable to create inode %llu\n", - (unsigned long long)blkno); ret = ERR_PTR(-EACCES); goto bail_unlock; } @@ -189,7 +187,6 @@ static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, * unlink. */ spin_lock(&oi->ip_lock); oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED; - oi->ip_orphaned_slot = OCFS2_INVALID_SLOT; spin_unlock(&oi->ip_lock); bail_add: @@ -288,7 +285,7 @@ static int ocfs2_fill_new_dir(struct ocfs2_super *osb, i_size_write(inode, inode->i_sb->s_blocksize); inode->i_nlink = 2; - inode->i_blocks = ocfs2_align_bytes_to_sectors(inode->i_sb->s_blocksize); + inode->i_blocks = ocfs2_inode_sector_count(inode); status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); if (status < 0) { mlog_errno(status); @@ -1486,8 +1483,7 @@ static int ocfs2_create_symlink_data(struct ocfs2_super *osb, struct buffer_head **bhs = NULL; const char *c; struct super_block *sb = osb->sb; - u64 p_blkno; - int p_blocks; + u64 p_blkno, p_blocks; int virtual, blocks, status, i, bytes_left; bytes_left = i_size_read(inode) + 1; @@ -1514,8 +1510,8 @@ static int ocfs2_create_symlink_data(struct ocfs2_super *osb, goto bail; } - status = ocfs2_extent_map_get_blocks(inode, 0, 1, &p_blkno, - &p_blocks); + status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks, + NULL); if (status < 0) { mlog_errno(status); goto bail; @@ -1674,8 +1670,11 @@ static int ocfs2_symlink(struct inode *dir, inode->i_rdev = 0; newsize = l - 1; if (l > ocfs2_fast_symlink_chars(sb)) { + u32 offset = 0; + inode->i_op = &ocfs2_symlink_inode_operations; - status = ocfs2_do_extend_allocation(osb, inode, 1, new_fe_bh, + status = ocfs2_do_extend_allocation(osb, inode, &offset, 1, + new_fe_bh, handle, data_ac, NULL, NULL); if (status < 0) { @@ -1689,7 +1688,7 @@ static int ocfs2_symlink(struct inode *dir, goto bail; } i_size_write(inode, newsize); - inode->i_blocks = ocfs2_align_bytes_to_sectors(newsize); + inode->i_blocks = ocfs2_inode_sector_count(inode); } else { inode->i_op = &ocfs2_fast_symlink_inode_operations; memcpy((char *) fe->id2.i_symlink, symname, l); @@ -2222,9 +2221,7 @@ static int ocfs2_orphan_add(struct ocfs2_super *osb, /* Record which orphan dir our inode now resides * in. delete_inode will use this to determine which orphan * dir to lock. */ - spin_lock(&OCFS2_I(inode)->ip_lock); - OCFS2_I(inode)->ip_orphaned_slot = osb->slot_num; - spin_unlock(&OCFS2_I(inode)->ip_lock); + fe->i_orphaned_slot = cpu_to_le16(osb->slot_num); mlog(0, "Inode %llu orphaned in slot %d\n", (unsigned long long)OCFS2_I(inode)->ip_blkno, osb->slot_num); diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h index db8e77c..82cc92d 100644 --- a/fs/ocfs2/ocfs2.h +++ b/fs/ocfs2/ocfs2.h @@ -46,11 +46,6 @@ #include "endian.h" #include "ocfs2_lockid.h" -struct ocfs2_extent_map { - u32 em_clusters; - struct rb_root em_extents; -}; - /* Most user visible OCFS2 inodes will have very few pieces of * metadata, but larger files (including bitmaps, etc) must be taken * into account when designing an access scheme. We allow a small @@ -303,6 +298,13 @@ static inline int ocfs2_should_order_data(struct inode *inode) return 1; } +static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) +{ + if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) + 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 @@ -461,6 +463,49 @@ static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) return (unsigned long)((bytes + 511) >> 9); } +static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, + unsigned long pg_index) +{ + u32 clusters = pg_index; + unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; + + if (unlikely(PAGE_CACHE_SHIFT > cbits)) + clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); + else if (PAGE_CACHE_SHIFT < cbits) + clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); + + return clusters; +} + +/* + * Find the 1st page index which covers the given clusters. + */ +static inline unsigned long ocfs2_align_clusters_to_page_index(struct super_block *sb, + u32 clusters) +{ + unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; + unsigned long index = clusters; + + if (PAGE_CACHE_SHIFT > cbits) { + index = clusters >> (PAGE_CACHE_SHIFT - cbits); + } else if (PAGE_CACHE_SHIFT < cbits) { + index = clusters << (cbits - PAGE_CACHE_SHIFT); + } + + return index; +} + +static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) +{ + unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; + unsigned int pages_per_cluster = 1; + + if (PAGE_CACHE_SHIFT < cbits) + pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); + + return pages_per_cluster; +} + #define ocfs2_set_bit ext2_set_bit #define ocfs2_clear_bit ext2_clear_bit #define ocfs2_test_bit ext2_test_bit diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h index e61e218..7130647 100644 --- a/fs/ocfs2/ocfs2_fs.h +++ b/fs/ocfs2/ocfs2_fs.h @@ -86,7 +86,8 @@ OCFS2_SB(sb)->s_feature_incompat &= ~(mask) #define OCFS2_FEATURE_COMPAT_SUPP OCFS2_FEATURE_COMPAT_BACKUP_SB -#define OCFS2_FEATURE_INCOMPAT_SUPP OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT +#define OCFS2_FEATURE_INCOMPAT_SUPP (OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT \ + | OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) #define OCFS2_FEATURE_RO_COMPAT_SUPP 0 /* @@ -155,6 +156,12 @@ #define OCFS2_FL_MODIFIABLE (0x000100FF) /* User modifiable flags */ /* + * Extent record flags (e_node.leaf.flags) + */ +#define OCFS2_EXT_UNWRITTEN (0x01) /* Extent is allocated but + * unwritten */ + +/* * ioctl commands */ #define OCFS2_IOC_GETFLAGS _IOR('f', 1, long) @@ -282,10 +289,21 @@ static unsigned char ocfs2_type_by_mode[S_IFMT >> S_SHIFT] = { /* * On disk extent record for OCFS2 * It describes a range of clusters on disk. + * + * Length fields are divided into interior and leaf node versions. + * This leaves room for a flags field (OCFS2_EXT_*) in the leaf nodes. */ struct ocfs2_extent_rec { /*00*/ __le32 e_cpos; /* Offset into the file, in clusters */ - __le32 e_clusters; /* Clusters covered by this extent */ + union { + __le32 e_int_clusters; /* Clusters covered by all children */ + struct { + __le16 e_leaf_clusters; /* Clusters covered by this + extent */ + __u8 e_reserved1; + __u8 e_flags; /* Extent flags */ + }; + }; __le64 e_blkno; /* Physical disk offset, in blocks */ /*10*/ }; @@ -311,7 +329,10 @@ struct ocfs2_extent_list { /*00*/ __le16 l_tree_depth; /* Extent tree depth from this point. 0 means data extents hang directly off this - header (a leaf) */ + header (a leaf) + NOTE: The high 8 bits cannot be + used - tree_depth is never that big. + */ __le16 l_count; /* Number of extent records */ __le16 l_next_free_rec; /* Next unused extent slot */ __le16 l_reserved1; @@ -446,7 +467,9 @@ struct ocfs2_dinode { __le32 i_ctime_nsec; __le32 i_mtime_nsec; __le32 i_attr; - __le32 i_reserved1; + __le16 i_orphaned_slot; /* Only valid when OCFS2_ORPHANED_FL + was set in i_flags */ + __le16 i_reserved1; /*70*/ __le64 i_reserved2[8]; /*B8*/ union { __le64 i_pad1; /* Generic way to refer to this diff --git a/fs/ocfs2/ocfs2_lockid.h b/fs/ocfs2/ocfs2_lockid.h index 4d5d565..4ca02b1 100644 --- a/fs/ocfs2/ocfs2_lockid.h +++ b/fs/ocfs2/ocfs2_lockid.h @@ -44,6 +44,7 @@ enum ocfs2_lock_type { OCFS2_LOCK_TYPE_RENAME, OCFS2_LOCK_TYPE_RW, OCFS2_LOCK_TYPE_DENTRY, + OCFS2_LOCK_TYPE_OPEN, OCFS2_NUM_LOCK_TYPES }; @@ -69,6 +70,9 @@ static inline char ocfs2_lock_type_char(enum ocfs2_lock_type type) case OCFS2_LOCK_TYPE_DENTRY: c = 'N'; break; + case OCFS2_LOCK_TYPE_OPEN: + c = 'O'; + break; default: c = '\0'; } @@ -85,6 +89,7 @@ static char *ocfs2_lock_type_strings[] = { * important job it does, anyway. */ [OCFS2_LOCK_TYPE_RW] = "Write/Read", [OCFS2_LOCK_TYPE_DENTRY] = "Dentry", + [OCFS2_LOCK_TYPE_OPEN] = "Open", }; static inline const char *ocfs2_lock_type_string(enum ocfs2_lock_type type) diff --git a/fs/ocfs2/slot_map.c b/fs/ocfs2/slot_map.c index 2d3ac32..d921a28 100644 --- a/fs/ocfs2/slot_map.c +++ b/fs/ocfs2/slot_map.c @@ -197,7 +197,7 @@ int ocfs2_init_slot_info(struct ocfs2_super *osb) goto bail; } - status = ocfs2_extent_map_get_blocks(inode, 0ULL, 1, &blkno, NULL); + status = ocfs2_extent_map_get_blocks(inode, 0ULL, &blkno, NULL, NULL); if (status < 0) { mlog_errno(status); goto bail; diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c index 6dbb117..0da655a 100644 --- a/fs/ocfs2/suballoc.c +++ b/fs/ocfs2/suballoc.c @@ -381,8 +381,7 @@ static int ocfs2_block_group_alloc(struct ocfs2_super *osb, le32_to_cpu(fe->i_clusters))); spin_unlock(&OCFS2_I(alloc_inode)->ip_lock); i_size_write(alloc_inode, le64_to_cpu(fe->i_size)); - alloc_inode->i_blocks = - ocfs2_align_bytes_to_sectors(i_size_read(alloc_inode)); + alloc_inode->i_blocks = ocfs2_inode_sector_count(alloc_inode); status = 0; bail: diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index 6534f92..5c9e824 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -806,9 +806,6 @@ static int __init ocfs2_init(void) ocfs2_print_version(); - if (init_ocfs2_extent_maps()) - return -ENOMEM; - status = init_ocfs2_uptodate_cache(); if (status < 0) { mlog_errno(status); @@ -837,7 +834,6 @@ leave: if (status < 0) { ocfs2_free_mem_caches(); exit_ocfs2_uptodate_cache(); - exit_ocfs2_extent_maps(); } mlog_exit(status); @@ -863,8 +859,6 @@ static void __exit ocfs2_exit(void) unregister_filesystem(&ocfs2_fs_type); - exit_ocfs2_extent_maps(); - exit_ocfs2_uptodate_cache(); mlog_exit_void(); @@ -963,6 +957,7 @@ static void ocfs2_inode_init_once(void *data, ocfs2_lock_res_init_once(&oi->ip_rw_lockres); ocfs2_lock_res_init_once(&oi->ip_meta_lockres); ocfs2_lock_res_init_once(&oi->ip_data_lockres); + ocfs2_lock_res_init_once(&oi->ip_open_lockres); ocfs2_metadata_cache_init(&oi->vfs_inode); diff --git a/fs/ocfs2/vote.c b/fs/ocfs2/vote.c index f30e63b..4f82a2f 100644 --- a/fs/ocfs2/vote.c +++ b/fs/ocfs2/vote.c @@ -63,17 +63,10 @@ struct ocfs2_msg_hdr __be32 h_node_num; /* node sending this particular message. */ }; -/* OCFS2_MAX_FILENAME_LEN is 255 characters, but we want to align this - * for the network. */ -#define OCFS2_VOTE_FILENAME_LEN 256 struct ocfs2_vote_msg { struct ocfs2_msg_hdr v_hdr; - union { - __be32 v_generic1; - __be32 v_orphaned_slot; /* Used during delete votes */ - __be32 v_nlink; /* Used during unlink votes */ - } md1; /* Message type dependant 1 */ + __be32 v_reserved1; }; /* Responses are given these values to maintain backwards @@ -86,7 +79,6 @@ struct ocfs2_response_msg { struct ocfs2_msg_hdr r_hdr; __be32 r_response; - __be32 r_orphaned_slot; }; struct ocfs2_vote_work { @@ -96,7 +88,6 @@ struct ocfs2_vote_work { enum ocfs2_vote_request { OCFS2_VOTE_REQ_INVALID = 0, - OCFS2_VOTE_REQ_DELETE, OCFS2_VOTE_REQ_MOUNT, OCFS2_VOTE_REQ_UMOUNT, OCFS2_VOTE_REQ_LAST @@ -151,135 +142,23 @@ static void ocfs2_process_umount_request(struct ocfs2_super *osb, ocfs2_node_map_set_bit(osb, &osb->umount_map, node_num); } -void ocfs2_mark_inode_remotely_deleted(struct inode *inode) -{ - struct ocfs2_inode_info *oi = OCFS2_I(inode); - - assert_spin_locked(&oi->ip_lock); - /* We set the SKIP_DELETE flag on the inode so we don't try to - * delete it in delete_inode ourselves, thus avoiding - * unecessary lock pinging. If the other node failed to wipe - * the inode as a result of a crash, then recovery will pick - * up the slack. */ - oi->ip_flags |= OCFS2_INODE_DELETED|OCFS2_INODE_SKIP_DELETE; -} - -static int ocfs2_process_delete_request(struct inode *inode, - int *orphaned_slot) -{ - int response = OCFS2_RESPONSE_BUSY; - - mlog(0, "DELETE vote on inode %lu, read lnk_cnt = %u, slot = %d\n", - inode->i_ino, inode->i_nlink, *orphaned_slot); - - spin_lock(&OCFS2_I(inode)->ip_lock); - - /* Whatever our vote response is, we want to make sure that - * the orphaned slot is recorded properly on this node *and* - * on the requesting node. Technically, if the requesting node - * did not know which slot the inode is orphaned in but we - * respond with BUSY he doesn't actually need the orphaned - * slot, but it doesn't hurt to do it here anyway. */ - if ((*orphaned_slot) != OCFS2_INVALID_SLOT) { - mlog_bug_on_msg(OCFS2_I(inode)->ip_orphaned_slot != - OCFS2_INVALID_SLOT && - OCFS2_I(inode)->ip_orphaned_slot != - (*orphaned_slot), - "Inode %llu: This node thinks it's " - "orphaned in slot %d, messaged it's in %d\n", - (unsigned long long)OCFS2_I(inode)->ip_blkno, - OCFS2_I(inode)->ip_orphaned_slot, - *orphaned_slot); - - mlog(0, "Setting orphaned slot for inode %llu to %d\n", - (unsigned long long)OCFS2_I(inode)->ip_blkno, - *orphaned_slot); - - OCFS2_I(inode)->ip_orphaned_slot = *orphaned_slot; - } else { - mlog(0, "Sending back orphaned slot %d for inode %llu\n", - OCFS2_I(inode)->ip_orphaned_slot, - (unsigned long long)OCFS2_I(inode)->ip_blkno); - - *orphaned_slot = OCFS2_I(inode)->ip_orphaned_slot; - } - - /* vote no if the file is still open. */ - if (OCFS2_I(inode)->ip_open_count) { - mlog(0, "open count = %u\n", - OCFS2_I(inode)->ip_open_count); - spin_unlock(&OCFS2_I(inode)->ip_lock); - goto done; - } - spin_unlock(&OCFS2_I(inode)->ip_lock); - - /* directories are a bit ugly... What if someone is sitting in - * it? We want to make sure the inode is removed completely as - * a result of the iput in process_vote. */ - if (S_ISDIR(inode->i_mode) && (atomic_read(&inode->i_count) != 1)) { - mlog(0, "i_count = %u\n", atomic_read(&inode->i_count)); - goto done; - } - - if (filemap_fdatawrite(inode->i_mapping)) { - mlog(ML_ERROR, "Could not sync inode %llu for delete!\n", - (unsigned long long)OCFS2_I(inode)->ip_blkno); - goto done; - } - sync_mapping_buffers(inode->i_mapping); - truncate_inode_pages(inode->i_mapping, 0); - ocfs2_extent_map_trunc(inode, 0); - - spin_lock(&OCFS2_I(inode)->ip_lock); - /* double check open count - someone might have raced this - * thread into ocfs2_file_open while we were writing out - * data. If we're to allow a wipe of this inode now, we *must* - * hold the spinlock until we've marked it. */ - if (OCFS2_I(inode)->ip_open_count) { - mlog(0, "Raced to wipe! open count = %u\n", - OCFS2_I(inode)->ip_open_count); - spin_unlock(&OCFS2_I(inode)->ip_lock); - goto done; - } - - /* Mark the inode as being wiped from disk. */ - ocfs2_mark_inode_remotely_deleted(inode); - spin_unlock(&OCFS2_I(inode)->ip_lock); - - /* Not sure this is necessary anymore. */ - d_prune_aliases(inode); - - /* If we get here, then we're voting 'yes', so commit the - * delete on our side. */ - response = OCFS2_RESPONSE_OK; -done: - return response; -} - static void ocfs2_process_vote(struct ocfs2_super *osb, struct ocfs2_vote_msg *msg) { int net_status, vote_response; - int orphaned_slot = 0; - unsigned int node_num, generation; + unsigned int node_num; u64 blkno; enum ocfs2_vote_request request; - struct inode *inode = NULL; struct ocfs2_msg_hdr *hdr = &msg->v_hdr; struct ocfs2_response_msg response; /* decode the network mumbo jumbo into local variables. */ request = be32_to_cpu(hdr->h_request); blkno = be64_to_cpu(hdr->h_blkno); - generation = be32_to_cpu(hdr->h_generation); node_num = be32_to_cpu(hdr->h_node_num); - if (request == OCFS2_VOTE_REQ_DELETE) - orphaned_slot = be32_to_cpu(msg->md1.v_orphaned_slot); - mlog(0, "processing vote: request = %u, blkno = %llu, " - "generation = %u, node_num = %u, priv1 = %u\n", request, - (unsigned long long)blkno, generation, node_num, - be32_to_cpu(msg->md1.v_generic1)); + mlog(0, "processing vote: request = %u, blkno = %llu, node_num = %u\n", + request, (unsigned long long)blkno, node_num); if (!ocfs2_is_valid_vote_request(request)) { mlog(ML_ERROR, "Invalid vote request %d from node %u\n", @@ -302,52 +181,6 @@ static void ocfs2_process_vote(struct ocfs2_super *osb, break; } - /* We cannot process the remaining message types before we're - * fully mounted. It's perfectly safe however to send a 'yes' - * response as we can't possibly have any of the state they're - * asking us to modify yet. */ - if (atomic_read(&osb->vol_state) == VOLUME_INIT) - goto respond; - - /* If we get here, then the request is against an inode. */ - inode = ocfs2_ilookup_for_vote(osb, blkno, - request == OCFS2_VOTE_REQ_DELETE); - - /* Not finding the inode is perfectly valid - it means we're - * not interested in what the other node is about to do to it - * so in those cases we automatically respond with an - * affirmative. Cluster locking ensures that we won't race - * interest in the inode with this vote request. */ - if (!inode) - goto respond; - - /* Check generation values. It's possible for us to get a - * request against a stale inode. If so then we proceed as if - * we had not found an inode in the first place. */ - if (inode->i_generation != generation) { - mlog(0, "generation passed %u != inode generation = %u, " - "ip_flags = %x, ip_blkno = %llu, msg %llu, i_count = %u, " - "message type = %u\n", generation, inode->i_generation, - OCFS2_I(inode)->ip_flags, - (unsigned long long)OCFS2_I(inode)->ip_blkno, - (unsigned long long)blkno, atomic_read(&inode->i_count), - request); - iput(inode); - inode = NULL; - goto respond; - } - - switch (request) { - case OCFS2_VOTE_REQ_DELETE: - vote_response = ocfs2_process_delete_request(inode, - &orphaned_slot); - break; - default: - mlog(ML_ERROR, "node %u, invalid request: %u\n", - node_num, request); - vote_response = OCFS2_RESPONSE_BAD_MSG; - } - respond: /* Response struture is small so we just put it on the stack * and stuff it inline. */ @@ -357,7 +190,6 @@ respond: response.r_hdr.h_generation = hdr->h_generation; response.r_hdr.h_node_num = cpu_to_be32(osb->node_num); response.r_response = cpu_to_be32(vote_response); - response.r_orphaned_slot = cpu_to_be32(orphaned_slot); net_status = o2net_send_message(OCFS2_MESSAGE_TYPE_RESPONSE, osb->net_key, @@ -373,9 +205,6 @@ respond: && net_status != -ENOTCONN) mlog(ML_ERROR, "message to node %u fails with error %d!\n", node_num, net_status); - - if (inode) - iput(inode); } static void ocfs2_vote_thread_do_work(struct ocfs2_super *osb) @@ -634,8 +463,7 @@ bail: static struct ocfs2_vote_msg * ocfs2_new_vote_request(struct ocfs2_super *osb, u64 blkno, unsigned int generation, - enum ocfs2_vote_request type, - u32 priv) + enum ocfs2_vote_request type) { struct ocfs2_vote_msg *request; struct ocfs2_msg_hdr *hdr; @@ -651,8 +479,6 @@ static struct ocfs2_vote_msg * ocfs2_new_vote_request(struct ocfs2_super *osb, hdr->h_request = cpu_to_be32(type); hdr->h_blkno = cpu_to_be64(blkno); hdr->h_generation = cpu_to_be32(generation); - - request->md1.v_generic1 = cpu_to_be32(priv); } return request; @@ -664,7 +490,7 @@ static int ocfs2_do_request_vote(struct ocfs2_super *osb, struct ocfs2_vote_msg *request, struct ocfs2_net_response_cb *callback) { - int status, response; + int status, response = -EBUSY; unsigned int response_id; struct ocfs2_msg_hdr *hdr; @@ -686,109 +512,12 @@ bail: return status; } -static int ocfs2_request_vote(struct inode *inode, - struct ocfs2_vote_msg *request, - struct ocfs2_net_response_cb *callback) -{ - int status; - struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); - - if (ocfs2_inode_is_new(inode)) - return 0; - - status = -EAGAIN; - while (status == -EAGAIN) { - if (!(osb->s_mount_opt & OCFS2_MOUNT_NOINTR) && - signal_pending(current)) - return -ERESTARTSYS; - - status = ocfs2_super_lock(osb, 0); - if (status < 0) { - mlog_errno(status); - break; - } - - status = 0; - if (!ocfs2_node_map_is_only(osb, &osb->mounted_map, - osb->node_num)) - status = ocfs2_do_request_vote(osb, request, callback); - - ocfs2_super_unlock(osb, 0); - } - return status; -} - -static void ocfs2_delete_response_cb(void *priv, - struct ocfs2_response_msg *resp) -{ - int orphaned_slot, node; - struct inode *inode = priv; - - orphaned_slot = be32_to_cpu(resp->r_orphaned_slot); - node = be32_to_cpu(resp->r_hdr.h_node_num); - mlog(0, "node %d tells us that inode %llu is orphaned in slot %d\n", - node, (unsigned long long)OCFS2_I(inode)->ip_blkno, - orphaned_slot); - - /* The other node may not actually know which slot the inode - * is orphaned in. */ - if (orphaned_slot == OCFS2_INVALID_SLOT) - return; - - /* Ok, the responding node knows which slot this inode is - * orphaned in. We verify that the information is correct and - * then record this in the inode. ocfs2_delete_inode will use - * this information to determine which lock to take. */ - spin_lock(&OCFS2_I(inode)->ip_lock); - mlog_bug_on_msg(OCFS2_I(inode)->ip_orphaned_slot != orphaned_slot && - OCFS2_I(inode)->ip_orphaned_slot - != OCFS2_INVALID_SLOT, "Inode %llu: Node %d says it's " - "orphaned in slot %d, we think it's in %d\n", - (unsigned long long)OCFS2_I(inode)->ip_blkno, - be32_to_cpu(resp->r_hdr.h_node_num), - orphaned_slot, OCFS2_I(inode)->ip_orphaned_slot); - - OCFS2_I(inode)->ip_orphaned_slot = orphaned_slot; - spin_unlock(&OCFS2_I(inode)->ip_lock); -} - -int ocfs2_request_delete_vote(struct inode *inode) -{ - int orphaned_slot, status; - struct ocfs2_net_response_cb delete_cb; - struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); - struct ocfs2_vote_msg *request; - - spin_lock(&OCFS2_I(inode)->ip_lock); - orphaned_slot = OCFS2_I(inode)->ip_orphaned_slot; - spin_unlock(&OCFS2_I(inode)->ip_lock); - - delete_cb.rc_cb = ocfs2_delete_response_cb; - delete_cb.rc_priv = inode; - - mlog(0, "Inode %llu, we start thinking orphaned slot is %d\n", - (unsigned long long)OCFS2_I(inode)->ip_blkno, orphaned_slot); - - status = -ENOMEM; - request = ocfs2_new_vote_request(osb, OCFS2_I(inode)->ip_blkno, - inode->i_generation, - OCFS2_VOTE_REQ_DELETE, orphaned_slot); - if (request) { - status = ocfs2_request_vote(inode, request, &delete_cb); - - kfree(request); - } - - return status; -} - int ocfs2_request_mount_vote(struct ocfs2_super *osb) { int status; struct ocfs2_vote_msg *request = NULL; - request = ocfs2_new_vote_request(osb, 0ULL, 0, - OCFS2_VOTE_REQ_MOUNT, 0); + request = ocfs2_new_vote_request(osb, 0ULL, 0, OCFS2_VOTE_REQ_MOUNT); if (!request) { status = -ENOMEM; goto bail; @@ -821,8 +550,7 @@ int ocfs2_request_umount_vote(struct ocfs2_super *osb) int status; struct ocfs2_vote_msg *request = NULL; - request = ocfs2_new_vote_request(osb, 0ULL, 0, - OCFS2_VOTE_REQ_UMOUNT, 0); + request = ocfs2_new_vote_request(osb, 0ULL, 0, OCFS2_VOTE_REQ_UMOUNT); if (!request) { status = -ENOMEM; goto bail; @@ -969,7 +697,6 @@ static int ocfs2_handle_vote_message(struct o2net_msg *msg, be32_to_cpu(work->w_msg.v_hdr.h_generation)); mlog(0, "h_node_num = %u\n", be32_to_cpu(work->w_msg.v_hdr.h_node_num)); - mlog(0, "v_generic1 = %u\n", be32_to_cpu(work->w_msg.md1.v_generic1)); spin_lock(&osb->vote_task_lock); list_add_tail(&work->w_list, &osb->vote_list); diff --git a/fs/ocfs2/vote.h b/fs/ocfs2/vote.h index 53ebc1c6..9ea46f6 100644 --- a/fs/ocfs2/vote.h +++ b/fs/ocfs2/vote.h @@ -38,14 +38,11 @@ static inline void ocfs2_kick_vote_thread(struct ocfs2_super *osb) wake_up(&osb->vote_event); } -int ocfs2_request_delete_vote(struct inode *inode); int ocfs2_request_mount_vote(struct ocfs2_super *osb); int ocfs2_request_umount_vote(struct ocfs2_super *osb); int ocfs2_register_net_handlers(struct ocfs2_super *osb); void ocfs2_unregister_net_handlers(struct ocfs2_super *osb); -void ocfs2_mark_inode_remotely_deleted(struct inode *inode); - void ocfs2_remove_node_from_vote_queues(struct ocfs2_super *osb, int node_num); #endif @@ -239,13 +239,11 @@ out: /* * `endbyte' is inclusive */ -int do_sync_file_range(struct file *file, loff_t offset, loff_t endbyte, - unsigned int flags) +int do_sync_mapping_range(struct address_space *mapping, loff_t offset, + loff_t endbyte, unsigned int flags) { int ret; - struct address_space *mapping; - mapping = file->f_mapping; if (!mapping) { ret = -EINVAL; goto out; @@ -275,4 +273,4 @@ int do_sync_file_range(struct file *file, loff_t offset, loff_t endbyte, out: return ret; } -EXPORT_SYMBOL_GPL(do_sync_file_range); +EXPORT_SYMBOL_GPL(do_sync_mapping_range); |
