1 /* $NetBSD: nfsrvcache.h,v 1.1.1.1 2013/09/30 07:19:42 dholland Exp $ */ 2 /*- 3 * Copyright (c) 1989, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Rick Macklem at The University of Guelph. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * FreeBSD: head/sys/fs/nfs/nfsrvcache.h 254337 2013-08-14 21:11:26Z rmacklem 34 * $NetBSD: nfsrvcache.h,v 1.1.1.1 2013/09/30 07:19:42 dholland Exp $ 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 TAILQ_ENTRY(nfsrvcache) rc_lru; /* UDP lru chain */ 52 u_int32_t rc_xid; /* rpc id number */ 53 time_t rc_timestamp; /* Time done */ 54 union { 55 mbuf_t repmb; /* Reply mbuf list OR */ 56 int repstat; /* Reply status */ 57 } rc_un; 58 union { 59 struct { 60 union nethostaddr haddr; /* Host address */ 61 } udp; 62 struct { 63 u_int64_t sockref; 64 u_int32_t len; 65 u_int32_t tcpseq; 66 int16_t refcnt; 67 u_int16_t cksum; 68 time_t cachetime; 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 87 /* Return values */ 88 #define RC_DROPIT 0 89 #define RC_REPLY 1 90 #define RC_DOIT 2 91 92 /* Flag bits */ 93 #define RC_LOCKED 0x0001 94 #define RC_WANTED 0x0002 95 #define RC_REPSTATUS 0x0004 96 #define RC_REPMBUF 0x0008 97 #define RC_UDP 0x0010 98 #define RC_INETIPV6 0x0020 99 #define RC_INPROG 0x0040 100 #define RC_TCPSEQ 0x0080 101 #define RC_NFSV2 0x0100 102 #define RC_NFSV3 0x0200 103 #define RC_NFSV4 0x0400 104 #define RC_NFSVERS (RC_NFSV2 | RC_NFSV3 | RC_NFSV4) 105 #define RC_REFCNT 0x0800 106 #define RC_SAMETCPCONN 0x1000 107 108 LIST_HEAD(nfsrvhashhead, nfsrvcache); 109 110 /* The fine-grained locked cache hash table for TCP. */ 111 struct nfsrchash_bucket { 112 struct mtx mtx; 113 char lock_name[16]; 114 struct nfsrvhashhead tbl; 115 }; 116 117 #endif /* _NFS_NFSRVCACHE_H_ */ 118