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, 106 insertions, 0 deletions

diff --git a/sys/fs/nfsclient/nfsmount.h b/sys/fs/nfsclient/nfsmount.h
new file mode 100644
index 0000000..acf438e
--- /dev/null
+++ b/sys/fs/nfsclient/nfsmount.h
@@ -0,0 +1,106 @@
+/*-
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Rick Macklem at The University of Guelph.
+ *
+ * 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.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 _NFSCLIENT_NFSMOUNT_H_
+#define	_NFSCLIENT_NFSMOUNT_H_
+
+/*
+ * Mount structure.
+ * One allocated on every NFS mount.
+ * Holds NFS specific information for mount.
+ */
+struct	nfsmount {
+	struct mtx	nm_mtx;
+	int	nm_flag;		/* Flags for soft/hard... */
+	int	nm_state;		/* Internal state flags */
+	struct	mount *nm_mountp;	/* Vfs structure for this filesystem */
+	int	nm_numgrps;		/* Max. size of groupslist */
+	u_char	nm_fh[NFSX_FHMAX];	/* File handle of root dir */
+	int	nm_fhsize;		/* Size of root file handle */
+	struct	nfssockreq nm_sockreq;	/* Socket Info */
+	int	nm_timeo;		/* Init timer for NFSMNT_DUMBTIMR */
+	int	nm_retry;		/* Max retries */
+	int	nm_timeouts;		/* Request timeouts */
+	int	nm_rsize;		/* Max size of read rpc */
+	int	nm_wsize;		/* Max size of write rpc */
+	int	nm_readdirsize;		/* Size of a readdir rpc */
+	int	nm_readahead;		/* Num. of blocks to readahead */
+	int	nm_wcommitsize;		/* Max size of commit for write */
+	int	nm_acdirmin;		/* Directory attr cache min lifetime */
+	int	nm_acdirmax;		/* Directory attr cache max lifetime */
+	int	nm_acregmin;		/* Reg file attr cache min lifetime */
+	int	nm_acregmax;		/* Reg file attr cache max lifetime */
+	u_char	nm_verf[NFSX_VERF];	/* write verifier */
+	TAILQ_HEAD(, buf) nm_bufq;	/* async io buffer queue */
+	short	nm_bufqlen;		/* number of buffers in queue */
+	short	nm_bufqwant;		/* process wants to add to the queue */
+	int	nm_bufqiods;		/* number of iods processing queue */
+	u_int64_t nm_maxfilesize;	/* maximum file size */
+	int	nm_tprintf_initial_delay; /* initial delay */
+	int	nm_tprintf_delay;	/* interval for messages */
+
+	/* Newnfs additions */
+	int	nm_iothreadcnt;
+	struct proc *nm_iodwant[NFS_MAXRAHEAD];
+	struct	nfsclclient *nm_clp;
+	uid_t	nm_uid;			/* Uid for SetClientID etc. */
+	u_int64_t nm_clval;		/* identifies which clientid */
+	u_int64_t nm_fsid[2];		/* NFSv4 fsid */
+	u_int16_t nm_krbnamelen;	/* Krb5 host principal, if any */
+	u_int16_t nm_dirpathlen;	/* and mount dirpath, for V4 */
+	u_int16_t nm_srvkrbnamelen;	/* and the server's target name */
+	u_char	nm_name[1];	/* malloc'd actual len of krbname + dirpath */
+};
+
+#define	nm_nam		nm_sockreq.nr_nam
+#define	nm_sotype	nm_sockreq.nr_sotype
+#define	nm_so		nm_sockreq.nr_so
+#define	nm_soflags	nm_sockreq.nr_soflags
+#define	nm_soproto	nm_sockreq.nr_soproto
+#define	nm_client	nm_sockreq.nr_client
+#define	nm_krbname	nm_name
+
+#define	NFSMNT_DIRPATH(m)	(&((m)->nm_name[(m)->nm_krbnamelen + 1]))
+#define	NFSMNT_SRVKRBNAME(m)						\
+	(&((m)->nm_name[(m)->nm_krbnamelen + (m)->nm_dirpathlen + 2]))
+
+#if defined(_KERNEL)
+/*
+ * Convert mount ptr to nfsmount ptr.
+ */
+#define	VFSTONFS(mp)	((struct nfsmount *)((mp)->mnt_data))
+
+#endif	/* _KERNEL */
+
+#endif	/* _NFSCLIENT_NFSMOUNT_H_ */