1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 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 LIST_ENTRY(nfsrvcache) rc_ahash; /* ACK hash chain */ 50 TAILQ_ENTRY(nfsrvcache) rc_lru; /* UDP lru chain */ 51 u_int32_t rc_xid; /* rpc id number */ 52 time_t rc_timestamp; /* Time done */ 53 union { 54 struct mbuf *repmb; /* Reply mbuf list OR */ 55 int repstat; /* Reply status */ 56 } rc_un; 57 union { 58 struct { 59 union nethostaddr haddr; /* Host address */ 60 } udp; 61 struct { 62 u_int64_t sockref; 63 u_int32_t len; 64 u_int32_t tcpseq; 65 int16_t refcnt; 66 u_int16_t cksum; 67 time_t cachetime; 68 int acked; 69 } ot; 70 } rc_un2; 71 u_int16_t rc_proc; /* rpc proc number */ 72 u_int16_t rc_flag; /* Flag bits */ 73 }; 74 75 #define rc_reply rc_un.repmb 76 #define rc_status rc_un.repstat 77 #define rc_inet rc_un2.udp.haddr.had_inet.s_addr 78 #define rc_inet6 rc_un2.udp.haddr.had_inet6 79 #define rc_haddr rc_un2.udp.haddr 80 #define rc_sockref rc_un2.ot.sockref 81 #define rc_tcpseq rc_un2.ot.tcpseq 82 #define rc_refcnt rc_un2.ot.refcnt 83 #define rc_reqlen rc_un2.ot.len 84 #define rc_cksum rc_un2.ot.cksum 85 #define rc_cachetime rc_un2.ot.cachetime 86 #define rc_acked rc_un2.ot.acked 87 88 /* TCP ACK values */ 89 #define RC_NO_SEQ 0 90 #define RC_NO_ACK 1 91 #define RC_ACK 2 92 #define RC_NACK 3 93 94 /* Return values */ 95 #define RC_DROPIT 0 96 #define RC_REPLY 1 97 #define RC_DOIT 2 98 99 /* Flag bits */ 100 #define RC_LOCKED 0x0001 101 #define RC_WANTED 0x0002 102 #define RC_REPSTATUS 0x0004 103 #define RC_REPMBUF 0x0008 104 #define RC_UDP 0x0010 105 #define RC_INETIPV6 0x0020 106 #define RC_INPROG 0x0040 107 #define RC_NFSV2 0x0100 108 #define RC_NFSV3 0x0200 109 #define RC_NFSV4 0x0400 110 #define RC_NFSVERS (RC_NFSV2 | RC_NFSV3 | RC_NFSV4) 111 #define RC_REFCNT 0x0800 112 #define RC_SAMETCPCONN 0x1000 113 114 LIST_HEAD(nfsrvhashhead, nfsrvcache); 115 116 /* The fine-grained locked cache hash table for TCP. */ 117 struct nfsrchash_bucket { 118 struct mtx mtx; 119 struct nfsrvhashhead tbl; 120 }; 121 122 #endif /* _NFS_NFSRVCACHE_H_ */ 123