nfsrvcache.h revision 184588 
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: head/sys/nfsserver/nfsrvcache.h 184588 2008-11-03 10:38:00Z dfr $
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
49struct 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