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 are permitted 9 * provided that the above copyright notice and this paragraph are 10 * duplicated in all such forms and that any documentation, 11 * advertising materials, and other materials related to such 12 * distribution and use acknowledge that the software was developed 13 * by the University of California, Berkeley. The name of the 14 * University may not be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 19 * 20 * @(#)nfs.h 7.7 (Berkeley) 05/14/90 21 */ 22 23 /* 24 * Tunable constants for nfs 25 */ 26 27 #define NFS_MAXIOVEC 10 28 #define NFS_HZ 10 /* Ticks per second for NFS timeouts */ 29 #define NFS_TIMEO (1*NFS_HZ) /* Default timeout = 1 second */ 30 #define NFS_MINTIMEO (NFS_HZ/2) /* Min timeout to use */ 31 #define NFS_MAXTIMEO (60*NFS_HZ) /* Max timeout to backoff to */ 32 #define NFS_MINIDEMTIMEO (2*NFS_HZ) /* Min timeout for non-idempotent ops*/ 33 #define NFS_RELIABLETIMEO (300*NFS_HZ) /* Min timeout on reliable sockets */ 34 #define NFS_MAXREXMIT 100 /* Stop counting after this many */ 35 #define NFS_MAXWINDOW 1024 /* Max number of outstanding requests */ 36 #define NFS_RETRANS 10 /* Num of retrans for soft mounts */ 37 #define NFS_FISHY 6 /* Host not responding at this count */ 38 #define NFS_ATTRTIMEO 5 /* Attribute cache timeout in sec */ 39 #define NFS_WSIZE 8192 /* Max. write data size <= 8192 */ 40 #define NFS_RSIZE 8192 /* Max. read data size <= 8192 */ 41 #define NFS_MAXREADDIR NFS_RSIZE /* Max. size of directory read */ 42 #define NFS_MAXASYNCDAEMON 20 /* Max. number async_daemons runable */ 43 #define NMOD(a) ((a) % nfs_asyncdaemons) 44 45 /* 46 * The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts. 47 * What should be in this set is open to debate, but I believe that since 48 * I/O system calls on ufs are never interrupted by signals the set should 49 * be minimal. My reasoning is that many current programs that use signals 50 * such as SIGALRM will not expect file I/O system calls to be interrupted 51 * by them and break. 52 */ 53 #define NFSINT_SIGMASK (sigmask(SIGINT)|sigmask(SIGTERM)|sigmask(SIGKILL)| \ 54 sigmask(SIGHUP)|sigmask(SIGQUIT)) 55 56 /* 57 * Socket errors ignored for connectionless sockets?? 58 * For now, ignore them all 59 */ 60 #define NFSIGNORE_SOERROR(s, e) \ 61 ((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \ 62 ((s) & PR_CONNREQUIRED) == 0) 63 64 /* 65 * Nfs outstanding request list element 66 */ 67 struct nfsreq { 68 struct nfsreq *r_next; 69 struct nfsreq *r_prev; 70 struct mbuf *r_mreq; 71 struct mbuf *r_mrep; 72 struct nfsmount *r_nmp; 73 struct vnode *r_vp; 74 u_long r_xid; 75 short r_flags; /* flags on request, see below */ 76 short r_retry; /* max retransmission count */ 77 short r_rexmit; /* current retrans count */ 78 short r_timer; /* tick counter on reply */ 79 short r_timerinit; /* reinit tick counter on reply */ 80 struct proc *r_procp; /* Proc that did I/O system call */ 81 }; 82 83 /* Flag values for r_flags */ 84 #define R_TIMING 0x01 /* timing request (in mntp) */ 85 #define R_SENT 0x02 /* request has been sent */ 86 #define R_SOFTTERM 0x04 /* soft mnt, too many retries */ 87 #define R_INTR 0x08 /* intr mnt, signal pending */ 88 #define R_SOCKERR 0x10 /* Fatal error on socket */ 89 #define R_TPRINTFMSG 0x20 /* Did a tprintf msg. */ 90 #define R_MUSTRESEND 0x40 /* Must resend request */ 91 92 #ifdef KERNEL 93 /* 94 * Silly rename structure that hangs off the nfsnode until the name 95 * can be removed by nfs_inactive() 96 */ 97 struct sillyrename { 98 int s_flag; 99 nfsv2fh_t s_fh; 100 struct nameidata s_namei; 101 }; 102 103 /* And its flag values */ 104 #define REMOVE 0 105 #define RMDIR 1 106 #endif /* KERNEL */ 107 108 /* 109 * Stats structure 110 */ 111 struct nfsstats { 112 int attrcache_hits; 113 int attrcache_misses; 114 int lookupcache_hits; 115 int lookupcache_misses; 116 int direofcache_hits; 117 int direofcache_misses; 118 int biocache_reads; 119 int read_bios; 120 int read_physios; 121 int biocache_writes; 122 int write_bios; 123 int write_physios; 124 int biocache_readlinks; 125 int readlink_bios; 126 int biocache_readdirs; 127 int readdir_bios; 128 int rpccnt[NFS_NPROCS]; 129 int rpcretries; 130 int srvrpccnt[NFS_NPROCS]; 131 int srvrpc_errs; 132 int srv_errs; 133 int rpcrequests; 134 int rpctimeouts; 135 int rpcunexpected; 136 int rpcinvalid; 137 int srvcache_inproghits; 138 int srvcache_idemdonehits; 139 int srvcache_nonidemdonehits; 140 int srvcache_misses; 141 }; 142 143 #ifdef KERNEL 144 struct nfsstats nfsstats; 145 #endif /* KERNEL */ 146