1 | /* $NetBSD: nfsrvcache.h,v 1.16 2007/12/04 17:42:32 yamt 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. Neither the name of the University nor the names of its contributors |
19 | * may be used to endorse or promote products derived from this software |
20 | * without specific prior written permission. |
21 | * |
22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
32 | * SUCH DAMAGE. |
33 | * |
34 | * @(#)nfsrvcache.h 8.3 (Berkeley) 3/30/95 |
35 | */ |
36 | |
37 | |
38 | #ifndef _NFS_NFSRVCACHE_H_ |
39 | #define _NFS_NFSRVCACHE_H_ |
40 | |
41 | /* |
42 | * Definitions for the server recent request cache |
43 | */ |
44 | |
45 | #define NFSRVCACHESIZ 64 |
46 | |
47 | struct nfsrvcache { |
48 | kcondvar_t rc_cv; |
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_int32_t rc_proc; /* rpc proc number */ |
58 | int rc_state; /* Current state of request */ |
59 | int rc_gflags; /* Flag bits */ |
60 | int rc_flags; /* 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 | #define RC_CHECKIT 3 |
78 | |
79 | /* rc_gflags */ |
80 | #define RC_G_LOCKED 0x01 |
81 | |
82 | /* rc_flags */ |
83 | #define RC_REPSTATUS 0x04 |
84 | #define RC_REPMBUF 0x08 |
85 | #define RC_INETADDR 0x20 |
86 | #define RC_NAM 0x40 |
87 | |
88 | #endif |
89 | |