1/* $NetBSD: nfsrvcache.h,v 1.16 2007/12/04 17:42:32 yamt Exp $ */
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