initial import of NetBSD tree

1 files changed, 202 insertions, 0 deletions

diff --git a/sys/nfs/nqnfs.h b/sys/nfs/nqnfs.h
new file mode 100644
index 00000000000..f5f07347afc
--- /dev/null
+++ b/sys/nfs/nqnfs.h
@@ -0,0 +1,202 @@
+/*	$NetBSD: nqnfs.h,v 1.4 1994/12/13 17:17:08 mycroft Exp $	*/
+
+/*
+ * Copyright (c) 1992, 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 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.
+ *
+ *	@(#)nqnfs.h	8.2 (Berkeley) 8/18/94
+ */
+
+/*
+ * Definitions for NQNFS (Not Quite NFS) cache consistency protocol.
+ */
+
+/* Tunable constants */
+#define	NQ_CLOCKSKEW	3	/* Clock skew factor (sec) */
+#define	NQ_WRITESLACK	5	/* Delay for write cache flushing */
+#define	NQ_MAXLEASE	60	/* Max lease duration (sec) */
+#define	NQ_MINLEASE	5	/* Min lease duration (sec) */
+#define	NQ_DEFLEASE	30	/* Default lease duration (sec) */
+#define	NQ_RENEWAL	3	/* Time before expiry (sec) to renew */
+#define	NQ_TRYLATERDEL	15	/* Initial try later delay (sec) */
+#define	NQ_MAXNUMLEASE	2048	/* Upper bound on number of server leases */
+#define	NQ_DEADTHRESH	NQ_NEVERDEAD	/* Default nm_deadthresh */
+#define	NQ_NEVERDEAD	9	/* Greater than max. nm_timeouts */
+#define	NQLCHSZ		256	/* Server hash table size */
+
+#define	NQNFS_PROG	300105	/* As assigned by Sun */
+#define	NQNFS_VER1	1
+#define	NQNFS_EVICTSIZ	156	/* Size of eviction request in bytes */
+
+/*
+ * Definitions used for saving the "last lease expires" time in Non-volatile
+ * RAM on the server. The default definitions below assume that NOVRAM is not
+ * available.
+ */
+#define	NQSTORENOVRAM(t)
+#define	NQLOADNOVRAM(t)
+
+/*
+ * Defn and structs used on the server to maintain state for current leases.
+ * The list of host(s) that hold the lease are kept as nqhost structures.
+ * The first one lives in nqlease and any others are held in a linked
+ * list of nqm structures hanging off of nqlease.
+ *
+ * Each nqlease structure is chained into two lists. The first is a list
+ * ordered by increasing expiry time for nqsrv_timer() and the second is a chain
+ * hashed on lc_fh.
+ */
+#define	LC_MOREHOSTSIZ	10
+
+struct nqhost {
+	union {
+		struct {
+			u_short udp_flag;
+			u_short	udp_port;
+			union nethostaddr udp_haddr;
+		} un_udp;
+		struct {
+			u_short connless_flag;
+			u_short connless_spare;
+			union nethostaddr connless_haddr;
+		} un_connless;
+		struct {
+			u_short conn_flag;
+			u_short conn_spare;
+			struct nfssvc_sock *conn_slp;
+		} un_conn;
+	} lph_un;
+};
+#define	lph_flag	lph_un.un_udp.udp_flag
+#define	lph_port	lph_un.un_udp.udp_port
+#define	lph_haddr	lph_un.un_udp.udp_haddr
+#define	lph_inetaddr	lph_un.un_udp.udp_haddr.had_inetaddr
+#define	lph_claddr	lph_un.un_connless.connless_haddr
+#define	lph_nam		lph_un.un_connless.connless_haddr.had_nam
+#define	lph_slp		lph_un.un_conn.conn_slp
+
+struct nqlease {
+	LIST_ENTRY(nqlease) lc_hash;	/* Fhandle hash list */
+	CIRCLEQ_ENTRY(nqlease) lc_timer; /* Timer queue list */
+	time_t		lc_expiry;	/* Expiry time (sec) */
+	struct nqhost	lc_host;	/* Host that got lease */
+	struct nqm	*lc_morehosts;	/* Other hosts that share read lease */
+	fsid_t		lc_fsid;	/* Fhandle */
+	char		lc_fiddata[MAXFIDSZ];
+	struct vnode	*lc_vp;		/* Soft reference to associated vnode */
+};
+#define	lc_flag		lc_host.lph_un.un_udp.udp_flag
+
+/* lc_flag bits */
+#define	LC_VALID	0x0001	/* Host address valid */
+#define	LC_WRITE	0x0002	/* Write cache */
+#define	LC_NONCACHABLE	0x0004	/* Non-cachable lease */
+#define	LC_LOCKED	0x0008	/* Locked */
+#define	LC_WANTED	0x0010	/* Lock wanted */
+#define	LC_EXPIREDWANTED 0x0020	/* Want lease when expired */
+#define	LC_UDP		0x0040	/* Host address for udp socket */
+#define	LC_CLTP		0x0080	/* Host address for other connectionless */
+#define	LC_LOCAL	0x0100	/* Host is server */
+#define	LC_VACATED	0x0200	/* Host has vacated lease */
+#define	LC_WRITTEN	0x0400	/* Recently wrote to the leased file */
+#define	LC_SREF		0x0800	/* Holds a nfssvc_sock reference */
+
+struct nqm {
+	struct nqm	*lpm_next;
+	struct nqhost	lpm_hosts[LC_MOREHOSTSIZ];
+};
+
+/*
+ * Flag bits for flags argument to nqsrv_getlease.
+ */
+#define	NQL_READ	LEASE_READ	/* Read Request */
+#define	NQL_WRITE	LEASE_WRITE	/* Write Request */
+#define	NQL_CHECK	0x4		/* Check for lease */
+#define	NQL_NOVAL	0xffffffff	/* Invalid */
+
+/*
+ * Special value for slp for local server calls.
+ */
+#define	NQLOCALSLP	((struct nfssvc_sock *) -1)
+
+/*
+ * Server side macros.
+ */
+#define	nqsrv_getl(v, l) \
+		(void) nqsrv_getlease((v), &nfsd->nd_duration, \
+		 ((nfsd->nd_nqlflag != 0 && nfsd->nd_nqlflag != NQL_NOVAL) ? nfsd->nd_nqlflag : \
+		 ((l) | NQL_CHECK)), \
+		 nfsd, nam, &cache, &frev, cred)
+
+/*
+ * Client side macros that check for a valid lease.
+ */
+#define	NQNFS_CKINVALID(v, n, f) \
+ ((time.tv_sec > (n)->n_expiry && \
+ VFSTONFS((v)->v_mount)->nm_timeouts < VFSTONFS((v)->v_mount)->nm_deadthresh) \
+  || ((f) == NQL_WRITE && ((n)->n_flag & NQNFSWRITE) == 0))
+
+#define	NQNFS_CKCACHABLE(v, f) \
+ ((time.tv_sec <= VTONFS(v)->n_expiry || \
+  VFSTONFS((v)->v_mount)->nm_timeouts >= VFSTONFS((v)->v_mount)->nm_deadthresh) \
+   && (VTONFS(v)->n_flag & NQNFSNONCACHE) == 0 && \
+   ((f) == NQL_READ || (VTONFS(v)->n_flag & NQNFSWRITE)))
+
+#define	NQNFS_NEEDLEASE(v, p) \
+		(time.tv_sec > VTONFS(v)->n_expiry ? \
+		 ((VTONFS(v)->n_flag & NQNFSEVICTED) ? 0 : nqnfs_piggy[p]) : \
+		 (((time.tv_sec + NQ_RENEWAL) > VTONFS(v)->n_expiry && \
+		   nqnfs_piggy[p]) ? \
+		   ((VTONFS(v)->n_flag & NQNFSWRITE) ? \
+		    NQL_WRITE : nqnfs_piggy[p]) : 0))
+
+/*
+ * List head for timer queue.
+ */
+CIRCLEQ_HEAD(, nqlease) nqtimerhead;
+
+/*
+ * List head for the file handle hash table.
+ */
+#define	NQFHHASH(f) \
+	(&nqfhhashtbl[(*((u_long *)(f))) & nqfhhash])
+LIST_HEAD(nqfhhashhead, nqlease) *nqfhhashtbl;
+u_long nqfhhash;
+
+/*
+ * Nqnfs return status numbers.
+ */
+#define	NQNFS_EXPIRED	500
+#define	NQNFS_TRYLATER	501
+#define NQNFS_AUTHERR	502