nfsrvcache.h revision 1.2 
1/*	$NetBSD: nfsrvcache.h,v 1.9 1995/12/19 23:08:11 cgd 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. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the University of
21 *	California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 *    may be used to endorse or promote products derived from this software
24 *    without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 *	@(#)nfsrvcache.h	8.2 (Berkeley) 8/18/94
39 */
40
41/*
42 * Definitions for the server recent request cache
43 */
44
45#define	NFSRVCACHESIZ	256
46
47struct nfsrvcache {
48	TAILQ_ENTRY(nfsrvcache) rc_lru;		/* LRU chain */
49	LIST_ENTRY(nfsrvcache) rc_hash;		/* Hash chain */
50	u_int32_t rc_xid;			/* rpc id number */
51	union {
52		struct mbuf *ru_repmb;		/* Reply mbuf list OR */
53		int ru_repstat;			/* Reply status */
54	} rc_un;
55	union nethostaddr rc_haddr;		/* Host address */
56	u_int16_t rc_proc;			/* rpc proc number */
57	u_char	  rc_state;			/* Current state of request */
58	u_char	  rc_flag;			/* Flag bits */
59};
60
61#define	rc_reply	rc_un.ru_repmb
62#define	rc_status	rc_un.ru_repstat
63#define	rc_inetaddr	rc_haddr.had_inetaddr
64#define	rc_nam		rc_haddr.had_nam
65
66/* Cache entry states */
67#define	RC_UNUSED	0
68#define	RC_INPROG	1
69#define	RC_DONE		2
70
71/* Return values */
72#define	RC_DROPIT	0
73#define	RC_REPLY	1
74#define	RC_DOIT		2
75#define	RC_CHECKIT	3
76
77/* Flag bits */
78#define	RC_LOCKED	0x01
79#define	RC_WANTED	0x02
80#define	RC_REPSTATUS	0x04
81#define	RC_REPMBUF	0x08
82#define	RC_NQNFS	0x10
83#define	RC_INETADDR	0x20
84#define	RC_NAM		0x40
85