1 /* $NetBSD: nfsrvcache.h,v 1.11 1997/05/12 23:36:07 fvdl 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfsrvcache.h 8.3 (Berkeley) 3/30/95 39 */ 40 41 42 #ifndef _NFS_NFSRVCACHE_H_ 43 #define _NFS_NFSRVCACHE_H_ 44 45 /* 46 * Definitions for the server recent request cache 47 */ 48 49 #define NFSRVCACHESIZ 64 50 51 struct nfsrvcache { 52 TAILQ_ENTRY(nfsrvcache) rc_lru; /* LRU chain */ 53 LIST_ENTRY(nfsrvcache) rc_hash; /* Hash chain */ 54 u_int32_t rc_xid; /* rpc id number */ 55 union { 56 struct mbuf *ru_repmb; /* Reply mbuf list OR */ 57 int ru_repstat; /* Reply status */ 58 } rc_un; 59 union nethostaddr rc_haddr; /* Host address */ 60 u_int32_t rc_proc; /* rpc proc number */ 61 u_char rc_state; /* Current state of request */ 62 u_char rc_flag; /* Flag bits */ 63 }; 64 65 #define rc_reply rc_un.ru_repmb 66 #define rc_status rc_un.ru_repstat 67 #define rc_inetaddr rc_haddr.had_inetaddr 68 #define rc_nam rc_haddr.had_nam 69 70 /* Cache entry states */ 71 #define RC_UNUSED 0 72 #define RC_INPROG 1 73 #define RC_DONE 2 74 75 /* Return values */ 76 #define RC_DROPIT 0 77 #define RC_REPLY 1 78 #define RC_DOIT 2 79 #define RC_CHECKIT 3 80 81 /* Flag bits */ 82 #define RC_LOCKED 0x01 83 #define RC_WANTED 0x02 84 #define RC_REPSTATUS 0x04 85 #define RC_REPMBUF 0x08 86 #define RC_NQNFS 0x10 87 #define RC_INETADDR 0x20 88 #define RC_NAM 0x40 89 90 #endif 91