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 * 3. 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 * @(#)nfsrvcache.h 8.3 (Berkeley) 3/30/95 33 * $FreeBSD: src/sys/nfs/nfsrvcache.h,v 1.12 1999/08/28 00:50:03 peter Exp $ 34 * $DragonFly: src/sys/vfs/nfs/nfsrvcache.h,v 1.2 2003/06/17 04:28:54 dillon Exp $ 35 */ 36 37 38 #ifndef _NFS_NFSRVCACHE_H_ 39 #define _NFS_NFSRVCACHE_H_ 40 41 #include <sys/queue.h> 42 43 /* 44 * Definitions for the server recent request cache 45 */ 46 47 #define NFSRVCACHE_MAX_SIZE (2048) 48 #define NFSRVCACHE_MIN_SIZE (64) 49 50 struct nfsrvcache { 51 TAILQ_ENTRY(nfsrvcache) rc_lru; /* LRU chain */ 52 LIST_ENTRY(nfsrvcache) rc_hash; /* Hash chain */ 53 u_int32_t rc_xid; /* rpc id number */ 54 union { 55 struct mbuf *ru_repmb; /* Reply mbuf list OR */ 56 int ru_repstat; /* Reply status */ 57 } rc_un; 58 union nethostaddr rc_haddr; /* Host address */ 59 u_int32_t rc_proc; /* rpc proc number */ 60 u_char rc_state; /* Current state of request */ 61 u_char rc_flag; /* Flag bits */ 62 }; 63 64 #define rc_reply rc_un.ru_repmb 65 #define rc_status rc_un.ru_repstat 66 #define rc_inetaddr rc_haddr.had_inetaddr 67 #define rc_nam rc_haddr.had_nam 68 69 /* Cache entry states */ 70 #define RC_UNUSED 0 71 #define RC_INPROG 1 72 #define RC_DONE 2 73 74 /* Return values */ 75 #define RC_DROPIT 0 76 #define RC_REPLY 1 77 #define RC_DOIT 2 78 #define RC_CHECKIT 3 79 80 /* Flag bits */ 81 #define RC_LOCKED 0x01 82 #define RC_WANTED 0x02 83 #define RC_REPSTATUS 0x04 84 #define RC_REPMBUF 0x08 85 #define RC_NQNFS 0x10 86 #define RC_INETADDR 0x20 87 #define RC_NAM 0x40 88 89 #endif 90