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 * $FreeBSD$ 35 */ 36 37 #ifndef _NFS_NFSRVCACHE_H_ 38 #define _NFS_NFSRVCACHE_H_ 39 40 /* 41 * Definitions for the server recent request cache 42 */ 43 #define NFSRVCACHE_MAX_SIZE 2048 44 #define NFSRVCACHE_MIN_SIZE 64 45 46 #define NFSRVCACHE_HASHSIZE 500 47 48 /* Cache table entry. */ 49 struct nfsrvcache { 50 LIST_ENTRY(nfsrvcache) rc_hash; /* Hash chain */ 51 LIST_ENTRY(nfsrvcache) rc_ahash; /* ACK hash chain */ 52 TAILQ_ENTRY(nfsrvcache) rc_lru; /* UDP lru chain */ 53 u_int32_t rc_xid; /* rpc id number */ 54 time_t rc_timestamp; /* Time done */ 55 union { 56 mbuf_t repmb; /* Reply mbuf list OR */ 57 int repstat; /* Reply status */ 58 } rc_un; 59 union { 60 struct { 61 union nethostaddr haddr; /* Host address */ 62 } udp; 63 struct { 64 u_int64_t sockref; 65 u_int32_t len; 66 u_int32_t tcpseq; 67 int16_t refcnt; 68 u_int16_t cksum; 69 time_t cachetime; 70 int acked; 71 } ot; 72 } rc_un2; 73 u_int16_t rc_proc; /* rpc proc number */ 74 u_int16_t rc_flag; /* Flag bits */ 75 }; 76 77 #define rc_reply rc_un.repmb 78 #define rc_status rc_un.repstat 79 #define rc_inet rc_un2.udp.haddr.had_inet.s_addr 80 #define rc_inet6 rc_un2.udp.haddr.had_inet6 81 #define rc_haddr rc_un2.udp.haddr 82 #define rc_sockref rc_un2.ot.sockref 83 #define rc_tcpseq rc_un2.ot.tcpseq 84 #define rc_refcnt rc_un2.ot.refcnt 85 #define rc_reqlen rc_un2.ot.len 86 #define rc_cksum rc_un2.ot.cksum 87 #define rc_cachetime rc_un2.ot.cachetime 88 #define rc_acked rc_un2.ot.acked 89 90 /* TCP ACK values */ 91 #define RC_NO_SEQ 0 92 #define RC_NO_ACK 1 93 #define RC_ACK 2 94 #define RC_NACK 3 95 96 /* Return values */ 97 #define RC_DROPIT 0 98 #define RC_REPLY 1 99 #define RC_DOIT 2 100 101 /* Flag bits */ 102 #define RC_LOCKED 0x0001 103 #define RC_WANTED 0x0002 104 #define RC_REPSTATUS 0x0004 105 #define RC_REPMBUF 0x0008 106 #define RC_UDP 0x0010 107 #define RC_INETIPV6 0x0020 108 #define RC_INPROG 0x0040 109 #define RC_NFSV2 0x0100 110 #define RC_NFSV3 0x0200 111 #define RC_NFSV4 0x0400 112 #define RC_NFSVERS (RC_NFSV2 | RC_NFSV3 | RC_NFSV4) 113 #define RC_REFCNT 0x0800 114 #define RC_SAMETCPCONN 0x1000 115 116 LIST_HEAD(nfsrvhashhead, nfsrvcache); 117 118 /* The fine-grained locked cache hash table for TCP. */ 119 struct nfsrchash_bucket { 120 struct mtx mtx; 121 struct nfsrvhashhead tbl; 122 }; 123 124 #endif /* _NFS_NFSRVCACHE_H_ */ 125