1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * 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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)nfs.h 7.11 (Berkeley) 4/19/91 37 * $Id: nfs.h,v 1.2 1993/05/20 03:18:35 cgd Exp $ 38 */ 39 40 #ifndef _NFS_NFS_H_ 41 #define _NFS_NFS_H_ 42 43 /* 44 * Tunable constants for nfs 45 */ 46 47 #define NFS_MAXIOVEC 34 48 #define NFS_HZ 10 /* Ticks per second for NFS timeouts */ 49 #define NFS_TIMEO (1*NFS_HZ) /* Default timeout = 1 second */ 50 #define NFS_MINTIMEO (NFS_HZ) /* Min timeout to use */ 51 #define NFS_MAXTIMEO (60*NFS_HZ) /* Max timeout to backoff to */ 52 #define NFS_MINIDEMTIMEO (2*NFS_HZ) /* Min timeout for non-idempotent ops*/ 53 #define NFS_RELIABLETIMEO (5*NFS_HZ) /* Min timeout on reliable sockets */ 54 #define NFS_MAXREXMIT 100 /* Stop counting after this many */ 55 #define NFS_MAXWINDOW 1024 /* Max number of outstanding requests */ 56 #define NFS_RETRANS 10 /* Num of retrans for soft mounts */ 57 #define NFS_FISHY 8 /* Host not responding at this count */ 58 #define NFS_ATTRTIMEO 5 /* Attribute cache timeout in sec */ 59 #define NFS_WSIZE 8192 /* Def. write data size <= 8192 */ 60 #define NFS_RSIZE 8192 /* Def. read data size <= 8192 */ 61 #define NFS_MAXREADDIR NFS_MAXDATA /* Max. size of directory read */ 62 #define NFS_MAXASYNCDAEMON 20 /* Max. number async_daemons runable */ 63 #define NFS_DIRBLKSIZ 1024 /* Size of an NFS directory block */ 64 #define NMOD(a) ((a) % nfs_asyncdaemons) 65 66 /* 67 * The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts. 68 * What should be in this set is open to debate, but I believe that since 69 * I/O system calls on ufs are never interrupted by signals the set should 70 * be minimal. My reasoning is that many current programs that use signals 71 * such as SIGALRM will not expect file I/O system calls to be interrupted 72 * by them and break. 73 */ 74 #define NFSINT_SIGMASK (sigmask(SIGINT)|sigmask(SIGTERM)|sigmask(SIGKILL)| \ 75 sigmask(SIGHUP)|sigmask(SIGQUIT)) 76 77 /* 78 * Socket errors ignored for connectionless sockets?? 79 * For now, ignore them all 80 */ 81 #define NFSIGNORE_SOERROR(s, e) \ 82 ((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \ 83 ((s) & PR_CONNREQUIRED) == 0) 84 85 /* 86 * Nfs outstanding request list element 87 */ 88 struct nfsreq { 89 struct nfsreq *r_next; 90 struct nfsreq *r_prev; 91 struct mbuf *r_mreq; 92 struct mbuf *r_mrep; 93 struct nfsmount *r_nmp; 94 struct vnode *r_vp; 95 u_long r_xid; 96 short r_flags; /* flags on request, see below */ 97 short r_retry; /* max retransmission count */ 98 short r_rexmit; /* current retrans count */ 99 short r_timer; /* tick counter on reply */ 100 short r_timerinit; /* reinit tick counter on reply */ 101 struct proc *r_procp; /* Proc that did I/O system call */ 102 }; 103 104 /* Flag values for r_flags */ 105 #define R_TIMING 0x01 /* timing request (in mntp) */ 106 #define R_SENT 0x02 /* request has been sent */ 107 #define R_SOFTTERM 0x04 /* soft mnt, too many retries */ 108 #define R_INTR 0x08 /* intr mnt, signal pending */ 109 #define R_SOCKERR 0x10 /* Fatal error on socket */ 110 #define R_TPRINTFMSG 0x20 /* Did a tprintf msg. */ 111 #define R_MUSTRESEND 0x40 /* Must resend request */ 112 113 #ifdef KERNEL 114 /* 115 * Silly rename structure that hangs off the nfsnode until the name 116 * can be removed by nfs_inactive() 117 */ 118 struct sillyrename { 119 nfsv2fh_t s_fh; 120 struct ucred *s_cred; 121 struct vnode *s_dvp; 122 u_short s_namlen; 123 char s_name[20]; 124 }; 125 126 /* And its flag values */ 127 #define REMOVE 0 128 #define RMDIR 1 129 #endif /* KERNEL */ 130 131 /* 132 * Stats structure 133 */ 134 struct nfsstats { 135 int attrcache_hits; 136 int attrcache_misses; 137 int lookupcache_hits; 138 int lookupcache_misses; 139 int direofcache_hits; 140 int direofcache_misses; 141 int biocache_reads; 142 int read_bios; 143 int read_physios; 144 int biocache_writes; 145 int write_bios; 146 int write_physios; 147 int biocache_readlinks; 148 int readlink_bios; 149 int biocache_readdirs; 150 int readdir_bios; 151 int rpccnt[NFS_NPROCS]; 152 int rpcretries; 153 int srvrpccnt[NFS_NPROCS]; 154 int srvrpc_errs; 155 int srv_errs; 156 int rpcrequests; 157 int rpctimeouts; 158 int rpcunexpected; 159 int rpcinvalid; 160 int srvcache_inproghits; 161 int srvcache_idemdonehits; 162 int srvcache_nonidemdonehits; 163 int srvcache_misses; 164 }; 165 166 #ifdef KERNEL 167 struct nfsstats nfsstats; 168 #endif /* KERNEL */ 169 170 #endif /* !_NFS_NFS_H_ */ 171