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 * $FreeBSD$
33 */
34
35#ifndef _NFS_NFSRVCACHE_H_
36#define	_NFS_NFSRVCACHE_H_
37
38/*
39 * Definitions for the server recent request cache
40 */
41#define	NFSRVCACHE_MAX_SIZE	2048
42#define	NFSRVCACHE_MIN_SIZE	  64
43
44#define	NFSRVCACHE_HASHSIZE	500
45
46/* Cache table entry. */
47struct nfsrvcache {
48	LIST_ENTRY(nfsrvcache) rc_hash;		/* Hash chain */
49	TAILQ_ENTRY(nfsrvcache)	rc_lru;		/* UDP lru chain */
50	u_int32_t	rc_xid;			/* rpc id number */
51	time_t		rc_timestamp;		/* Time done */
52	union {
53		mbuf_t repmb;			/* Reply mbuf list OR */
54		int repstat;			/* Reply status */
55	} rc_un;
56	union {
57		struct {
58			union nethostaddr haddr; /* Host address */
59		} udp;
60		struct {
61			u_int64_t	sockref;
62			u_int32_t	len;
63			u_int32_t	tcpseq;
64			int16_t		refcnt;
65			u_int16_t	cksum;
66			time_t		cachetime;
67		} ot;
68	} rc_un2;
69	u_int16_t	rc_proc;		/* rpc proc number */
70	u_int16_t	rc_flag;		/* Flag bits */
71};
72
73#define	rc_reply	rc_un.repmb
74#define	rc_status	rc_un.repstat
75#define	rc_inet		rc_un2.udp.haddr.had_inet.s_addr
76#define	rc_inet6	rc_un2.udp.haddr.had_inet6
77#define	rc_haddr	rc_un2.udp.haddr
78#define	rc_sockref	rc_un2.ot.sockref
79#define	rc_tcpseq	rc_un2.ot.tcpseq
80#define	rc_refcnt	rc_un2.ot.refcnt
81#define	rc_reqlen	rc_un2.ot.len
82#define	rc_cksum	rc_un2.ot.cksum
83#define	rc_cachetime	rc_un2.ot.cachetime
84
85/* Return values */
86#define	RC_DROPIT		0
87#define	RC_REPLY		1
88#define	RC_DOIT			2
89
90/* Flag bits */
91#define	RC_LOCKED	0x0001
92#define	RC_WANTED	0x0002
93#define	RC_REPSTATUS	0x0004
94#define	RC_REPMBUF	0x0008
95#define	RC_UDP		0x0010
96#define	RC_INETIPV6	0x0020
97#define	RC_INPROG	0x0040
98#define	RC_TCPSEQ	0x0080
99#define	RC_NFSV2	0x0100
100#define	RC_NFSV3	0x0200
101#define	RC_NFSV4	0x0400
102#define	RC_NFSVERS	(RC_NFSV2 | RC_NFSV3 | RC_NFSV4)
103#define	RC_REFCNT	0x0800
104#define	RC_SAMETCPCONN	0x1000
105
106LIST_HEAD(nfsrvhashhead, nfsrvcache);
107
108/* The fine-grained locked cache hash table for TCP. */
109struct nfsrchash_bucket {
110	struct mtx		mtx;
111	char			lock_name[16];
112	struct nfsrvhashhead	tbl;
113};
114
115#endif	/* _NFS_NFSRVCACHE_H_ */
116