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 * $FreeBSD$ 33 */ 34 35 #ifndef _NFS_NFSRVCACHE_H_ 36 #define _NFS_NFSRVCACHE_H_ 37 38 /* 39 * Definitions for the server recent request cache 40 */ 41 #define NFSRVCACHE_MAX_SIZE 2048 42 #define NFSRVCACHE_MIN_SIZE 64 43 44 #define NFSRVCACHE_HASHSIZE 20 45 46 struct nfsrvcache { 47 LIST_ENTRY(nfsrvcache) rc_hash; /* Hash chain */ 48 TAILQ_ENTRY(nfsrvcache) rc_lru; /* UDP lru chain */ 49 u_int32_t rc_xid; /* rpc id number */ 50 time_t rc_timestamp; /* Time done */ 51 union { 52 mbuf_t repmb; /* Reply mbuf list OR */ 53 int repstat; /* Reply status */ 54 } rc_un; 55 union { 56 struct { 57 union nethostaddr haddr; /* Host address */ 58 } udp; 59 struct { 60 u_int64_t sockref; 61 u_int32_t len; 62 u_int32_t tcpseq; 63 int16_t refcnt; 64 u_int16_t cksum; 65 time_t cachetime; 66 } ot; 67 } rc_un2; 68 u_int16_t rc_proc; /* rpc proc number */ 69 u_int16_t rc_flag; /* Flag bits */ 70 }; 71 72 #define rc_reply rc_un.repmb 73 #define rc_status rc_un.repstat 74 #define rc_inet rc_un2.udp.haddr.had_inet.s_addr 75 #define rc_inet6 rc_un2.udp.haddr.had_inet6 76 #define rc_haddr rc_un2.udp.haddr 77 #define rc_sockref rc_un2.ot.sockref 78 #define rc_tcpseq rc_un2.ot.tcpseq 79 #define rc_refcnt rc_un2.ot.refcnt 80 #define rc_reqlen rc_un2.ot.len 81 #define rc_cksum rc_un2.ot.cksum 82 #define rc_cachetime rc_un2.ot.cachetime 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 0x0001 91 #define RC_WANTED 0x0002 92 #define RC_REPSTATUS 0x0004 93 #define RC_REPMBUF 0x0008 94 #define RC_UDP 0x0010 95 #define RC_INETIPV6 0x0020 96 #define RC_INPROG 0x0040 97 #define RC_TCPSEQ 0x0080 98 #define RC_NFSV2 0x0100 99 #define RC_NFSV3 0x0200 100 #define RC_NFSV4 0x0400 101 #define RC_NFSVERS (RC_NFSV2 | RC_NFSV3 | RC_NFSV4) 102 #define RC_REFCNT 0x0800 103 #define RC_SAMETCPCONN 0x1000 104 105 LIST_HEAD(nfsrvhashhead, nfsrvcache); 106 107 #endif /* _NFS_NFSRVCACHE_H_ */ 108