nfsrvcache.h revision 1.6
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
48struct 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
87