nfsrvcache.h revision 2175
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 8.1 (Berkeley) 6/10/93 37 * $Id: nfsrvcache.h,v 1.2 1994/08/02 07:52:25 davidg Exp $ 38 */ 39 40#ifndef _NFS_NFSRVCACHE_H_ 41#define _NFS_NFSRVCACHE_H_ 42 43/* 44 * Definitions for the server recent request cache 45 */ 46 47#define NFSRVCACHESIZ 256 48 49struct nfsrvcache { 50 struct nfsrvcache *rc_forw; /* Hash chain links */ 51 struct nfsrvcache **rc_back; /* Hash chain links */ 52 struct nfsrvcache *rc_next; /* Lru list */ 53 struct nfsrvcache **rc_prev; /* Lru list */ 54 u_long 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 short 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