1 /*-
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)nfsrvcache.h 8.3 (Berkeley) 3/30/95
33 * $FreeBSD: src/sys/nfsserver/nfsrvcache.h,v 1.20 2008/11/03 10:38:00 dfr Exp $
34 */
35
36 #ifndef _NFSSERVER_NFSRVCACHE_H_
37 #define _NFSSERVER_NFSRVCACHE_H_
38
39 #include <sys/queue.h>
40
41 /*
42 * Definitions for the server recent request cache
43 */
44 #define NFSRVCACHE_MAX_SIZE 2048
45 #define NFSRVCACHE_MIN_SIZE 64
46
47 #ifdef NFS_LEGACYRPC
48
49 struct nfsrvcache {
50 TAILQ_ENTRY(nfsrvcache) rc_lru; /* LRU chain */
51 LIST_ENTRY(nfsrvcache) rc_hash; /* Hash chain */
52 u_int32_t rc_xid; /* rpc id number */
53 union {
54 struct mbuf *ru_repmb; /* Reply mbuf list OR */
55 int ru_repstat; /* Reply status */
56 } rc_un;
57 union nethostaddr rc_haddr; /* Host address */
58 u_int32_t rc_proc; /* rpc proc number */
59 u_char rc_state; /* Current state of request */
60 u_char rc_flag; /* 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
78 /* Flag bits */
79 #define RC_LOCKED 0x01
80 #define RC_WANTED 0x02
81 #define RC_REPSTATUS 0x04
82 #define RC_REPMBUF 0x08
83 /* free 0x10 */
84 #define RC_INETADDR 0x20
85 #define RC_NAM 0x40
86
87 #endif
88
89 #endif
90
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