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, 105 insertions, 0 deletions

diff --git a/sys/fs/nfs/nfsdport.h b/sys/fs/nfs/nfsdport.h
new file mode 100644
index 0000000..f8ee445
--- /dev/null
+++ b/sys/fs/nfs/nfsdport.h
@@ -0,0 +1,105 @@
+/*-
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * These macros handle nfsvattr fields. They look a bit silly here, but
+ * are quite different for the Darwin port.
+ */
+#define	NFSVNO_ATTRINIT(n)		(VATTR_NULL(&((n)->na_vattr)))
+#define	NFSVNO_SETATTRVAL(n, f, v)	((n)->na_##f = (v))
+#define	NFSVNO_SETACTIVE(n, f)
+#define	NFSVNO_UNSET(n, f)		((n)->na_##f = VNOVAL)
+#define	NFSVNO_NOTSETMODE(n)		((n)->na_mode == ((mode_t)VNOVAL))
+#define	NFSVNO_ISSETMODE(n)		((n)->na_mode != ((mode_t)VNOVAL))
+#define	NFSVNO_NOTSETUID(n)		((n)->na_uid == ((uid_t)VNOVAL))
+#define	NFSVNO_ISSETUID(n)		((n)->na_uid != ((uid_t)VNOVAL))
+#define	NFSVNO_NOTSETGID(n)		((n)->na_gid == ((gid_t)VNOVAL))
+#define	NFSVNO_ISSETGID(n)		((n)->na_gid != ((gid_t)VNOVAL))
+#define	NFSVNO_NOTSETSIZE(n)		((n)->na_size == VNOVAL)
+#define	NFSVNO_ISSETSIZE(n)		((n)->na_size != VNOVAL)
+#define	NFSVNO_NOTSETATIME(n)		((n)->na_atime.tv_sec == VNOVAL)
+#define	NFSVNO_ISSETATIME(n)		((n)->na_atime.tv_sec != VNOVAL)
+#define	NFSVNO_NOTSETMTIME(n)		((n)->na_mtime.tv_sec == VNOVAL)
+#define	NFSVNO_ISSETMTIME(n)		((n)->na_mtime.tv_sec != VNOVAL)
+
+/*
+ * This structure acts as a "catch-all" for information that
+ * needs to be returned by nfsd_fhtovp().
+ */
+struct nfsexstuff {
+	int	nes_vfslocked;	/* required for all ports */
+	int	nes_exflag;
+};
+
+#define	NFSVNO_EXINIT(e)		((e)->nes_exflag = 0)
+#define	NFSVNO_EXPORTED(e)		((e)->nes_exflag & MNT_EXPORTED)
+#define	NFSVNO_EXRDONLY(e)		((e)->nes_exflag & MNT_EXRDONLY)
+#define	NFSVNO_EXPORTANON(e)		((e)->nes_exflag & MNT_EXPORTANON)
+#define	NFSVNO_EXSTRICTACCESS(e)	((e)->nes_exflag & MNT_EXSTRICTACCESS)
+#define	NFSVNO_EXGSSONLY(e)		((e)->nes_exflag & MNT_EXGSSONLY)
+#define	NFSVNO_EXV4ONLY(e)		((e)->nes_exflag & MNT_EXV4ONLY)
+
+#define	NFSVNO_SETEXRDONLY(e)	((e)->nes_exflag = (MNT_EXPORTED|MNT_EXRDONLY))
+#define	NFSVNO_SETEXGSSONLY(e)		((e)->nes_exflag |= MNT_EXGSSONLY)
+
+#define	NFSVNO_CMPFH(f1, f2)						\
+    ((f1)->fh_fsid.val[0] == (f2)->fh_fsid.val[0] &&			\
+     (f1)->fh_fsid.val[1] == (f2)->fh_fsid.val[1] &&			\
+     !bcmp((f1)->fh_fid.fid_data, (f2)->fh_fid.fid_data,		\
+            (f1)->fh_fid.fid_len))
+
+#define	NFSLOCKHASH(f) 							\
+	(&nfslockhash[(*((u_int32_t *)((f)->fh_fid.fid_data))) % NFSLOCKHASHSIZE])
+
+#define	NFSFPVNODE(f)	((struct vnode *)((f)->f_data))
+#define	NFSFPCRED(f)	((f)->f_cred)
+#define	NFSFPFLAG(f)	((f)->f_flag)
+
+int fp_getfvp(NFSPROC_T *, int, struct file **, struct vnode **);
+
+#define	NFSNAMEICNDSET(n, c, o, f)	do {				\
+	(n)->cn_cred = (c);						\
+	(n)->cn_nameiop = (o);						\
+	(n)->cn_flags = (f);						\
+    } while (0)
+
+/*
+ * A little bit of Darwin vfs kpi.
+ */
+#define	vnode_mount(v)	((v)->v_mount)
+#define	vfs_statfs(m)	(&((m)->mnt_stat))
+
+#define	NFSPATHLEN_T	size_t
+
+/*
+ * These are set to the minimum and maximum size of a server file
+ * handle.
+ */
+#define	NFSRV_MINFH	(sizeof (fhandle_t))
+#define	NFSRV_MAXFH	(sizeof (fhandle_t))
+