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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)nfsrvcache.h 8.3 (Berkeley) 3/30/95 37 * $FreeBSD: src/sys/nfs/nfsrvcache.h,v 1.12 1999/08/28 00:50:03 peter Exp $ 38 * $DragonFly: src/sys/vfs/nfs/nfsrvcache.h,v 1.2 2003/06/17 04:28:54 dillon Exp $ 39 */ 40 41 42 #ifndef _NFS_NFSRVCACHE_H_ 43 #define _NFS_NFSRVCACHE_H_ 44 45 #include <sys/queue.h> 46 47 /* 48 * Definitions for the server recent request cache 49 */ 50 51 #define NFSRVCACHE_MAX_SIZE (2048) 52 #define NFSRVCACHE_MIN_SIZE (64) 53 54 struct nfsrvcache { 55 TAILQ_ENTRY(nfsrvcache) rc_lru; /* LRU chain */ 56 LIST_ENTRY(nfsrvcache) rc_hash; /* Hash chain */ 57 u_int32_t rc_xid; /* rpc id number */ 58 union { 59 struct mbuf *ru_repmb; /* Reply mbuf list OR */ 60 int ru_repstat; /* Reply status */ 61 } rc_un; 62 union nethostaddr rc_haddr; /* Host address */ 63 u_int32_t rc_proc; /* rpc proc number */ 64 u_char rc_state; /* Current state of request */ 65 u_char rc_flag; /* Flag bits */ 66 }; 67 68 #define rc_reply rc_un.ru_repmb 69 #define rc_status rc_un.ru_repstat 70 #define rc_inetaddr rc_haddr.had_inetaddr 71 #define rc_nam rc_haddr.had_nam 72 73 /* Cache entry states */ 74 #define RC_UNUSED 0 75 #define RC_INPROG 1 76 #define RC_DONE 2 77 78 /* Return values */ 79 #define RC_DROPIT 0 80 #define RC_REPLY 1 81 #define RC_DOIT 2 82 #define RC_CHECKIT 3 83 84 /* Flag bits */ 85 #define RC_LOCKED 0x01 86 #define RC_WANTED 0x02 87 #define RC_REPSTATUS 0x04 88 #define RC_REPMBUF 0x08 89 #define RC_NQNFS 0x10 90 #define RC_INETADDR 0x20 91 #define RC_NAM 0x40 92 93 #endif 94