1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * 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 * from: @(#)nfsrvcache.h 7.3 (Berkeley) 6/28/90 37 * $Id: nfsrvcache.h,v 1.3 1993/05/20 03:19:12 cgd 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 128 48 #define NFSRCHSZ 32 49 50 struct nfsrvcache { 51 struct nfsrvcache *rc_chain[2]; /* Hash chain links */ 52 struct nfsrvcache *rc_next; /* Lru list */ 53 struct nfsrvcache *rc_prev; 54 int rc_state; /* Current state of request */ 55 int rc_flag; /* Flag bits */ 56 struct mbuf rc_nam; /* Sockaddr of requestor */ 57 u_long rc_xid; /* rpc id number */ 58 int rc_proc; /* rpc proc number */ 59 long rc_timestamp; /* Time stamp */ 60 union { 61 struct mbuf *rc_repmb; /* Reply mbuf list OR */ 62 int rc_repstat; /* Reply status */ 63 } rc_un; 64 }; 65 66 #define rc_forw rc_chain[0] 67 #define rc_back rc_chain[1] 68 #define rc_status rc_un.rc_repstat 69 #define rc_reply rc_un.rc_repmb 70 71 #define put_at_head(rp) \ 72 (rp)->rc_prev->rc_next = (rp)->rc_next; \ 73 (rp)->rc_next->rc_prev = (rp)->rc_prev; \ 74 (rp)->rc_next = nfsrvcachehead.rc_next; \ 75 (rp)->rc_next->rc_prev = (rp); \ 76 nfsrvcachehead.rc_next = (rp); \ 77 (rp)->rc_prev = &nfsrvcachehead 78 79 /* Cache entry states */ 80 #define RC_UNUSED 0 81 #define RC_INPROG 1 82 #define RC_DONE 2 83 84 /* Return values */ 85 #define RC_DROPIT 0 86 #define RC_REPLY 1 87 #define RC_DOIT 2 88 89 /* Flag bits */ 90 #define RC_LOCKED 0x1 91 #define RC_WANTED 0x2 92 #define RC_REPSTATUS 0x4 93 #define RC_REPMBUF 0x8 94 95 /* Delay time after completion that request is dropped */ 96 #define RC_DELAY 2 /* seconds */ 97 98 #endif /* !_NFS_NFSRVCACHE_H_ */ 99