1 /* $NetBSD: nfsrvcache.h,v 1.13 2005/12/11 12:25:17 christos 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 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_int32_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 86 #endif 87