1 /* $NetBSD: nfsrvcache.h,v 1.2 2016/12/13 22:52:46 pgoyette 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 269347 2014-07-31 19:24:44Z kib 34 * $NetBSD: nfsrvcache.h,v 1.2 2016/12/13 22:52:46 pgoyette 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 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 kmutex mtx; 121 struct nfsrvhashhead tbl; 122 }; 123 124 #endif /* _NFS_NFSRVCACHE_H_ */ 125