1/*	$NetBSD$	*/
2
3/*
4 * Copyright (c) 1989, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Rick Macklem at The University of Guelph.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 *	@(#)nfsrvcache.h	8.3 (Berkeley) 3/30/95
35 */
36
37
38#ifndef _NFS_NFSRVCACHE_H_
39#define _NFS_NFSRVCACHE_H_
40
41/*
42 * Definitions for the server recent request cache
43 */
44
45#define	NFSRVCACHESIZ	64
46
47struct nfsrvcache {
48	kcondvar_t rc_cv;
49	TAILQ_ENTRY(nfsrvcache) rc_lru;		/* LRU chain */
50	LIST_ENTRY(nfsrvcache) rc_hash;		/* Hash chain */
51	u_int32_t	rc_xid;				/* rpc id number */
52	union {
53		struct mbuf *ru_repmb;		/* Reply mbuf list OR */
54		int ru_repstat;			/* Reply status */
55	} rc_un;
56	union nethostaddr rc_haddr;		/* Host address */
57	u_int32_t rc_proc;			/* rpc proc number */
58	int rc_state;		/* Current state of request */
59	int rc_gflags;		/* Flag bits */
60	int rc_flags;		/* Flag bits */
61};
62
63#define	rc_reply	rc_un.ru_repmb
64#define	rc_status	rc_un.ru_repstat
65#define	rc_inetaddr	rc_haddr.had_inetaddr
66#define	rc_nam		rc_haddr.had_nam
67
68/* Cache entry states */
69#define	RC_UNUSED	0
70#define	RC_INPROG	1
71#define	RC_DONE		2
72
73/* Return values */
74#define	RC_DROPIT	0
75#define	RC_REPLY	1
76#define	RC_DOIT		2
77#define	RC_CHECKIT	3
78
79/* rc_gflags */
80#define	RC_G_LOCKED	0x01
81
82/* rc_flags */
83#define	RC_REPSTATUS	0x04
84#define	RC_REPMBUF	0x08
85#define	RC_INETADDR	0x20
86#define	RC_NAM		0x40
87
88#endif
89