nfsrvcache.h revision 184588
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 * 4. 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: head/sys/nfsserver/nfsrvcache.h 184588 2008-11-03 10:38:00Z dfr $ 34 */ 35 36#ifndef _NFSSERVER_NFSRVCACHE_H_ 37#define _NFSSERVER_NFSRVCACHE_H_ 38 39#include <sys/queue.h> 40 41/* 42 * Definitions for the server recent request cache 43 */ 44#define NFSRVCACHE_MAX_SIZE 2048 45#define NFSRVCACHE_MIN_SIZE 64 46 47#ifdef NFS_LEGACYRPC 48 49struct nfsrvcache { 50 TAILQ_ENTRY(nfsrvcache) rc_lru; /* LRU chain */ 51 LIST_ENTRY(nfsrvcache) rc_hash; /* Hash chain */ 52 u_int32_t rc_xid; /* rpc id number */ 53 union { 54 struct mbuf *ru_repmb; /* Reply mbuf list OR */ 55 int ru_repstat; /* Reply status */ 56 } rc_un; 57 union nethostaddr rc_haddr; /* Host address */ 58 u_int32_t rc_proc; /* rpc proc number */ 59 u_char rc_state; /* Current state of request */ 60 u_char rc_flag; /* 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 78/* Flag bits */ 79#define RC_LOCKED 0x01 80#define RC_WANTED 0x02 81#define RC_REPSTATUS 0x04 82#define RC_REPMBUF 0x08 83/* free 0x10 */ 84#define RC_INETADDR 0x20 85#define RC_NAM 0x40 86 87#endif 88 89#endif 90