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: releng/10.2/sys/fs/nfs/nfsrvcache.h 269655 2014-08-07 03:50:30Z kib $ 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. */ 47struct 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 mbuf_t 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 114LIST_HEAD(nfsrvhashhead, nfsrvcache); 115 116/* The fine-grained locked cache hash table for TCP. */ 117struct nfsrchash_bucket { 118 struct mtx mtx; 119 struct nfsrvhashhead tbl; 120}; 121 122#endif /* _NFS_NFSRVCACHE_H_ */ 123