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, 99 insertions, 0 deletions

diff --git a/sys/fs/nfs/xdr_subs.h b/sys/fs/nfs/xdr_subs.h
new file mode 100644
index 0000000..a3e69f9
--- /dev/null
+++ b/sys/fs/nfs/xdr_subs.h
@@ -0,0 +1,99 @@
+/*-
+ * 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 _NFS_XDR_SUBS_H_
+#define	_NFS_XDR_SUBS_H_
+
+/*
+ * Macros used for conversion to/from xdr representation by nfs...
+ * These use the MACHINE DEPENDENT routines ntohl, htonl
+ * As defined by "XDR: External Data Representation Standard" RFC1014
+ *
+ * To simplify the implementation, we use ntohl/htonl even on big-endian
+ * machines, and count on them being `#define'd away.  Some of these
+ * might be slightly more efficient as quad_t copies on a big-endian,
+ * but we cannot count on their alignment anyway.
+ */
+
+#define	fxdr_unsigned(t, v)	((t)ntohl((int32_t)(v)))
+#define	txdr_unsigned(v)	(htonl((int32_t)(v)))
+
+#define	fxdr_nfsv2time(f, t) do { 					\
+    (t)->tv_sec = ntohl(((struct nfsv2_time *)(f))->nfsv2_sec); 	\
+    if (((struct nfsv2_time *)(f))->nfsv2_usec != 0xffffffff) 		\
+	(t)->tv_nsec = 1000 * ntohl(((struct nfsv2_time *)(f))->nfsv2_usec); \
+    else 								\
+	(t)->tv_nsec = 0; 						\
+    } while (0)
+
+#define	txdr_nfsv2time(f, t) do { 					\
+    ((struct nfsv2_time *)(t))->nfsv2_sec = htonl((f)->tv_sec); 	\
+    if ((f)->tv_nsec != -1) 						\
+	((struct nfsv2_time *)(t))->nfsv2_usec = htonl((f)->tv_nsec / 1000); \
+    else 								\
+	((struct nfsv2_time *)(t))->nfsv2_usec = 0xffffffff; 		\
+    } while (0)
+
+#define	fxdr_nfsv3time(f, t) do { 					\
+	(t)->tv_sec = ntohl(((struct nfsv3_time *)(f))->nfsv3_sec); 	\
+	(t)->tv_nsec = ntohl(((struct nfsv3_time *)(f))->nfsv3_nsec); 	\
+    } while (0)
+
+#define	txdr_nfsv3time(f, t) do { 					\
+	((struct nfsv3_time *)(t))->nfsv3_sec = htonl((f)->tv_sec); 	\
+	((struct nfsv3_time *)(t))->nfsv3_nsec = htonl((f)->tv_nsec); 	\
+    } while (0)
+
+#define	fxdr_nfsv4time(f, t) do { 					\
+	(t)->tv_sec = ntohl(((struct nfsv4_time *)(f))->nfsv4_sec); 	\
+	(t)->tv_nsec = (ntohl(((struct nfsv4_time *)(f))->nfsv4_nsec) % \
+		1000000000); 						\
+    } while (0)
+
+#define	txdr_nfsv4time(f, t) do { 					\
+	((struct nfsv4_time *)(t))->nfsv4_highsec = 0; 			\
+	((struct nfsv4_time *)(t))->nfsv4_sec = htonl((f)->tv_sec); 	\
+	((struct nfsv4_time *)(t))->nfsv4_nsec = htonl((f)->tv_nsec); 	\
+    } while (0)
+
+#define	fxdr_hyper(f) 							\
+        ((((u_quad_t)ntohl(((u_int32_t *)(f))[0])) << 32) |		\
+	 (u_quad_t)(ntohl(((u_int32_t *)(f))[1])))
+
+#define	txdr_hyper(f, t) do {						\
+	((u_int32_t *)(t))[0] = htonl((u_int32_t)((f) >> 32));		\
+	((u_int32_t *)(t))[1] = htonl((u_int32_t)((f) & 0xffffffff));	\
+    } while (0)
+
+#endif	/* _NFS_XDR_SUBS_H_ */