| 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 | |