1 /* $OpenBSD: nfsrvcache.h,v 1.6 2003/06/02 23:28:20 millert Exp $ */
2 /* $NetBSD: nfsrvcache.h,v 1.10 1996/02/18 11:54:08 fvdl Exp $ */
3
4 /*
5 * Copyright (c) 1989, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Rick Macklem at The University of Guelph.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)nfsrvcache.h 8.3 (Berkeley) 3/30/95
36 */
37
38
39 #ifndef _NFS_NFSRVCACHE_H_
40 #define _NFS_NFSRVCACHE_H_
41
42 /*
43 * Definitions for the server recent request cache
44 */
45
46 #define NFSRVCACHESIZ 64
47
48 struct nfsrvcache {
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_int16_t rc_proc; /* rpc proc number */
58 u_char rc_state; /* Current state of request */
59 u_char rc_flag; /* Flag bits */
60 };
61
62 #define rc_reply rc_un.ru_repmb
63 #define rc_status rc_un.ru_repstat
64 #define rc_inetaddr rc_haddr.had_inetaddr
65 #define rc_nam rc_haddr.had_nam
66
67 /* Cache entry states */
68 #define RC_UNUSED 0
69 #define RC_INPROG 1
70 #define RC_DONE 2
71
72 /* Return values */
73 #define RC_DROPIT 0
74 #define RC_REPLY 1
75 #define RC_DOIT 2
76 #define RC_CHECKIT 3
77
78 /* Flag bits */
79 #define RC_LOCKED 0x01
80 #define RC_WANTED 0x02
81 #define RC_REPSTATUS 0x04
82 #define RC_REPMBUF 0x08
83 #define RC_INETADDR 0x20
84 #define RC_NAM 0x40
85
86 #endif