nfsrvcache.h revision 2175
11541Srgrimes/* 21541Srgrimes * Copyright (c) 1989, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * 51541Srgrimes * This code is derived from software contributed to Berkeley by 61541Srgrimes * Rick Macklem at The University of Guelph. 71541Srgrimes * 81541Srgrimes * Redistribution and use in source and binary forms, with or without 91541Srgrimes * modification, are permitted provided that the following conditions 101541Srgrimes * are met: 111541Srgrimes * 1. Redistributions of source code must retain the above copyright 121541Srgrimes * notice, this list of conditions and the following disclaimer. 131541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141541Srgrimes * notice, this list of conditions and the following disclaimer in the 151541Srgrimes * documentation and/or other materials provided with the distribution. 161541Srgrimes * 3. All advertising materials mentioning features or use of this software 171541Srgrimes * must display the following acknowledgement: 181541Srgrimes * This product includes software developed by the University of 191541Srgrimes * California, Berkeley and its contributors. 201541Srgrimes * 4. Neither the name of the University nor the names of its contributors 211541Srgrimes * may be used to endorse or promote products derived from this software 221541Srgrimes * without specific prior written permission. 231541Srgrimes * 241541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341541Srgrimes * SUCH DAMAGE. 351541Srgrimes * 361541Srgrimes * @(#)nfsrvcache.h 8.1 (Berkeley) 6/10/93 372175Spaul * $Id: nfsrvcache.h,v 1.2 1994/08/02 07:52:25 davidg Exp $ 381541Srgrimes */ 391541Srgrimes 402175Spaul#ifndef _NFS_NFSRVCACHE_H_ 412175Spaul#define _NFS_NFSRVCACHE_H_ 422175Spaul 431541Srgrimes/* 441541Srgrimes * Definitions for the server recent request cache 451541Srgrimes */ 461541Srgrimes 471541Srgrimes#define NFSRVCACHESIZ 256 481541Srgrimes 491541Srgrimesstruct nfsrvcache { 501541Srgrimes struct nfsrvcache *rc_forw; /* Hash chain links */ 511541Srgrimes struct nfsrvcache **rc_back; /* Hash chain links */ 521541Srgrimes struct nfsrvcache *rc_next; /* Lru list */ 531541Srgrimes struct nfsrvcache **rc_prev; /* Lru list */ 541541Srgrimes u_long rc_xid; /* rpc id number */ 551541Srgrimes union { 561541Srgrimes struct mbuf *ru_repmb; /* Reply mbuf list OR */ 571541Srgrimes int ru_repstat; /* Reply status */ 581541Srgrimes } rc_un; 591541Srgrimes union nethostaddr rc_haddr; /* Host address */ 601541Srgrimes short rc_proc; /* rpc proc number */ 611541Srgrimes u_char rc_state; /* Current state of request */ 621541Srgrimes u_char rc_flag; /* Flag bits */ 631541Srgrimes}; 641541Srgrimes 651541Srgrimes#define rc_reply rc_un.ru_repmb 661541Srgrimes#define rc_status rc_un.ru_repstat 671541Srgrimes#define rc_inetaddr rc_haddr.had_inetaddr 681541Srgrimes#define rc_nam rc_haddr.had_nam 691541Srgrimes 701541Srgrimes/* Cache entry states */ 711541Srgrimes#define RC_UNUSED 0 721541Srgrimes#define RC_INPROG 1 731541Srgrimes#define RC_DONE 2 741541Srgrimes 751541Srgrimes/* Return values */ 761541Srgrimes#define RC_DROPIT 0 771541Srgrimes#define RC_REPLY 1 781541Srgrimes#define RC_DOIT 2 791541Srgrimes#define RC_CHECKIT 3 801541Srgrimes 811541Srgrimes/* Flag bits */ 821541Srgrimes#define RC_LOCKED 0x01 831541Srgrimes#define RC_WANTED 0x02 841541Srgrimes#define RC_REPSTATUS 0x04 851541Srgrimes#define RC_REPMBUF 0x08 861541Srgrimes#define RC_NQNFS 0x10 871541Srgrimes#define RC_INETADDR 0x20 881541Srgrimes#define RC_NAM 0x40 892175Spaul 902175Spaul#endif 91