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 500 45 46 /* Cache table entry. */ 47 struct nfsrvcache { 48 LIST_ENTRY(nfsrvcache) rc_hash; /* Hash chain */ 49 TAILQ_ENTRY(nfsrvcache) rc_lru; /* UDP lru chain */ 50 u_int32_t rc_xid; /* rpc id number */ 51 time_t rc_timestamp; /* Time done */ 52 union { 53 mbuf_t repmb; /* Reply mbuf list OR */ 54 int repstat; /* Reply status */ 55 } rc_un; 56 union { 57 struct { 58 union nethostaddr haddr; /* Host address */ 59 } udp; 60 struct { 61 u_int64_t sockref; 62 u_int32_t len; 63 u_int32_t tcpseq; 64 int16_t refcnt; 65 u_int16_t cksum; 66 time_t cachetime; 67 } ot; 68 } rc_un2; 69 u_int16_t rc_proc; /* rpc proc number */ 70 u_int16_t rc_flag; /* Flag bits */ 71 }; 72 73 #define rc_reply rc_un.repmb 74 #define rc_status rc_un.repstat 75 #define rc_inet rc_un2.udp.haddr.had_inet.s_addr 76 #define rc_inet6 rc_un2.udp.haddr.had_inet6 77 #define rc_haddr rc_un2.udp.haddr 78 #define rc_sockref rc_un2.ot.sockref 79 #define rc_tcpseq rc_un2.ot.tcpseq 80 #define rc_refcnt rc_un2.ot.refcnt 81 #define rc_reqlen rc_un2.ot.len 82 #define rc_cksum rc_un2.ot.cksum 83 #define rc_cachetime rc_un2.ot.cachetime 84 85 /* Return values */ 86 #define RC_DROPIT 0 87 #define RC_REPLY 1 88 #define RC_DOIT 2 89 90 /* Flag bits */ 91 #define RC_LOCKED 0x0001 92 #define RC_WANTED 0x0002 93 #define RC_REPSTATUS 0x0004 94 #define RC_REPMBUF 0x0008 95 #define RC_UDP 0x0010 96 #define RC_INETIPV6 0x0020 97 #define RC_INPROG 0x0040 98 #define RC_TCPSEQ 0x0080 99 #define RC_NFSV2 0x0100 100 #define RC_NFSV3 0x0200 101 #define RC_NFSV4 0x0400 102 #define RC_NFSVERS (RC_NFSV2 | RC_NFSV3 | RC_NFSV4) 103 #define RC_REFCNT 0x0800 104 #define RC_SAMETCPCONN 0x1000 105 106 LIST_HEAD(nfsrvhashhead, nfsrvcache); 107 108 /* The fine-grained locked cache hash table for TCP. */ 109 struct nfsrchash_bucket { 110 struct mtx mtx; 111 char lock_name[16]; 112 struct nfsrvhashhead tbl; 113 }; 114 115 #endif /* _NFS_NFSRVCACHE_H_ */ 116