nfsrvcache.h revision 1541 
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 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *	@(#)nfsrvcache.h	8.1 (Berkeley) 6/10/93
37 */
38
39/*
40 * Definitions for the server recent request cache
41 */
42
43#define	NFSRVCACHESIZ	256
44
45struct nfsrvcache {
46	struct	nfsrvcache *rc_forw;		/* Hash chain links */
47	struct	nfsrvcache **rc_back;		/* Hash chain links */
48	struct	nfsrvcache *rc_next;		/* Lru list */
49	struct	nfsrvcache **rc_prev;		/* Lru list */
50	u_long	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	short	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