Add the experimental nfs subtree to the kernel, that includes

	support for NFSv4 as well as NFSv2 and 3.
	It lives in 3 subdirs under sys/fs:
	nfs - functions that are common to the client and server
	nfsclient - a mutation of sys/nfsclient that call generic functions
	to do RPCs and handle state. As such, it retains the
	buffer cache handling characteristics and vnode semantics that
	are found in sys/nfsclient, for the most part.
	nfsserver - the server. It includes a DRC designed specifically for
	NFSv4, that is used instead of the generic DRC in sys/rpc.
	The build glue will be checked in later, so at this point, it
	consists of 3 new subdirs that should not affect kernel building.

Approved by:	kib (mentor)

1 files changed, 175 insertions, 0 deletions

diff --git a/sys/fs/nfs/nfsclstate.h b/sys/fs/nfs/nfsclstate.h
new file mode 100644
index 0000000..10747af
--- /dev/null
+++ b/sys/fs/nfs/nfsclstate.h
@@ -0,0 +1,175 @@
+/*-
+ * Copyright (c) 2009 Rick Macklem, University of Guelph
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _NFS_NFSCLSTATE_H_
+#define	_NFS_NFSCLSTATE_H_
+
+/*
+ * Definitions for NFS V4 client state handling.
+ */
+LIST_HEAD(nfsclopenhead, nfsclopen);
+LIST_HEAD(nfscllockownerhead, nfscllockowner);
+LIST_HEAD(nfscllockhead, nfscllock);
+LIST_HEAD(nfsclhead, nfsclclient);
+LIST_HEAD(nfsclownerhead, nfsclowner);
+TAILQ_HEAD(nfscldeleghead, nfscldeleg);
+LIST_HEAD(nfscldeleghash, nfscldeleg);
+#define	NFSCLDELEGHASHSIZE	256
+#define	NFSCLDELEGHASH(c, f, l)						\
+	(&((c)->nfsc_deleghash[ncl_hash((f), (l)) % NFSCLDELEGHASHSIZE]))
+
+struct nfsclclient {
+	LIST_ENTRY(nfsclclient) nfsc_list;
+	struct nfsclownerhead	nfsc_owner;
+	struct nfscldeleghead	nfsc_deleg;
+	struct nfscldeleghash	nfsc_deleghash[NFSCLDELEGHASHSIZE];
+	struct nfscllockownerhead nfsc_defunctlockowner;
+	struct nfsv4lock nfsc_lock;
+	struct proc	*nfsc_renewthread;
+	struct nfsmount	*nfsc_nmp;
+	nfsquad_t	nfsc_clientid;
+	time_t		nfsc_expire;
+	u_int32_t	nfsc_clientidrev;
+	u_int32_t	nfsc_renew;
+	u_int32_t	nfsc_cbident;
+	u_int16_t	nfsc_flags;
+	u_int16_t	nfsc_idlen;
+	u_int8_t	nfsc_id[1];	/* Malloc'd to correct length */
+};
+
+/*
+ * Bits for nfsc_flags.
+ */
+#define	NFSCLFLAGS_INITED	0x0001
+#define	NFSCLFLAGS_HASCLIENTID	0x0002
+#define	NFSCLFLAGS_RECOVER	0x0004
+#define	NFSCLFLAGS_UMOUNT	0x0008
+#define	NFSCLFLAGS_HASTHREAD	0x0010
+#define	NFSCLFLAGS_AFINET6	0x0020
+#define	NFSCLFLAGS_EXPIREIT	0x0040
+#define	NFSCLFLAGS_FIRSTDELEG	0x0080
+#define	NFSCLFLAGS_GOTDELEG	0x0100
+
+struct nfsclowner {
+	LIST_ENTRY(nfsclowner)	nfsow_list;
+	struct nfsclopenhead	nfsow_open;
+	struct nfsclclient	*nfsow_clp;
+	u_int32_t		nfsow_seqid;
+	u_int32_t		nfsow_defunct;
+	struct nfsv4lock	nfsow_rwlock;
+	u_int8_t		nfsow_owner[NFSV4CL_LOCKNAMELEN];
+};
+
+/*
+ * MALLOC'd to the correct length to accommodate the file handle.
+ */
+struct nfscldeleg {
+	TAILQ_ENTRY(nfscldeleg)	nfsdl_list;
+	LIST_ENTRY(nfscldeleg)	nfsdl_hash;
+	struct nfsclownerhead	nfsdl_owner;	/* locally issued state */
+	struct nfscllockownerhead nfsdl_lock;
+	nfsv4stateid_t		nfsdl_stateid;
+	struct acl_entry	nfsdl_ace;	/* Delegation ace */
+	struct nfsclclient	*nfsdl_clp;
+	struct nfsv4lock	nfsdl_rwlock;	/* for active I/O ops */
+	struct nfscred		nfsdl_cred;	/* Cred. used for Open */
+	time_t			nfsdl_timestamp; /* used for stale cleanup */
+	u_int64_t		nfsdl_sizelimit; /* Limit for file growth */
+	u_int64_t		nfsdl_size;	/* saved copy of file size */
+	u_int64_t		nfsdl_change;	/* and change attribute */
+	struct timespec		nfsdl_modtime;	/* local modify time */
+	u_int16_t		nfsdl_fhlen;
+	u_int8_t		nfsdl_flags;
+	u_int8_t		nfsdl_fh[1];	/* must be last */
+};
+
+/*
+ * nfsdl_flags bits.
+ */
+#define	NFSCLDL_READ		0x01
+#define	NFSCLDL_WRITE		0x02
+#define	NFSCLDL_RECALL		0x04
+#define	NFSCLDL_NEEDRECLAIM	0x08
+#define	NFSCLDL_ZAPPED		0x10
+#define	NFSCLDL_MODTIMESET	0x20
+
+/*
+ * MALLOC'd to the correct length to accommodate the file handle.
+ */
+struct nfsclopen {
+	LIST_ENTRY(nfsclopen)	nfso_list;
+	struct nfscllockownerhead nfso_lock;
+	nfsv4stateid_t		nfso_stateid;
+	struct nfsclowner	*nfso_own;
+	struct nfscred		nfso_cred;	/* Cred. used for Open */
+	u_int32_t		nfso_mode;
+	u_int32_t		nfso_opencnt;
+	u_int16_t		nfso_fhlen;
+	u_int8_t		nfso_posixlock;	/* 1 for POSIX type locking */
+	u_int8_t		nfso_fh[1];	/* must be last */
+};
+
+/*
+ * Return values for nfscl_open(). NFSCLOPEN_OK must == 0.
+ */
+#define	NFSCLOPEN_OK		0
+#define	NFSCLOPEN_DOOPEN	1
+#define	NFSCLOPEN_DOOPENDOWNGRADE 2
+
+struct nfscllockowner {
+	LIST_ENTRY(nfscllockowner) nfsl_list;
+	struct nfscllockhead	nfsl_lock;
+	struct nfsclopen	*nfsl_open;
+	NFSPROC_T		*nfsl_inprog;
+	nfsv4stateid_t		nfsl_stateid;
+	u_int32_t		nfsl_seqid;
+	u_int32_t		nfsl_defunct;
+	struct nfsv4lock	nfsl_rwlock;
+	u_int8_t		nfsl_owner[NFSV4CL_LOCKNAMELEN];
+	u_int8_t		nfsl_openowner[NFSV4CL_LOCKNAMELEN];
+};
+
+/*
+ * Byte range entry for the above lock owner.
+ */
+struct nfscllock {
+	LIST_ENTRY(nfscllock)	nfslo_list;
+	u_int64_t		nfslo_first;
+	u_int64_t		nfslo_end;
+	short			nfslo_type;
+};
+
+/*
+ * Macro for incrementing the seqid#.
+ */
+#define	NFSCL_INCRSEQID(s, n)	do { 					\
+	    if (((n)->nd_flag & ND_INCRSEQID))				\
+		(s)++; 							\
+	} while (0)
+
+#endif	/* _NFS_NFSCLSTATE_H_ */