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 7.3 (Berkeley) 10/19/89 21 */ 22 23 /* 24 * Tunable constants for nfs 25 */ 26 #define MAX_IOVEC 10 27 #define NFS_TIMEO 10 /* Timeout in .1 sec intervals */ 28 #define NFS_MAXTIMEO 600 /* Max timeout to backoff too in .1 sec */ 29 #define NFS_ATTRTIMEO 5 /* Attribute cache timeout in sec */ 30 #define NFS_RETRANS 10 /* Num of retrans for soft mounts */ 31 #define NFS_WSIZE 8192 /* Max. write data size <= 8192 */ 32 #define NFS_RSIZE 8192 /* Max. read data size <= 8192 */ 33 #define MAX_READDIR NFS_RSIZE /* Max. size of directory read */ 34 #define MAX_ASYNCDAEMON 20 /* Max. number of async_daemons runnable */ 35 #define NMOD(a) ((a) % nfs_asyncdaemons) 36 37 /* 38 * Nfs outstanding request list element 39 */ 40 struct nfsreq { 41 struct nfsreq *r_next; 42 struct nfsreq *r_prev; 43 struct mbuf *r_mreq; 44 struct mbuf *r_mrep; 45 struct nfsmount *r_mntp; 46 struct vnode *r_vp; 47 int r_msiz; 48 u_long r_xid; 49 u_long r_inaddr; 50 u_long r_retry; 51 u_long r_timeout; 52 u_long r_timer; 53 }; 54 55 /* 56 * Silly rename structure that hangs off the nfsnode until the name 57 * can be removed by nfs_inactive() 58 */ 59 struct sillyrename { 60 int s_flag; 61 nfsv2fh_t s_fh; 62 struct nameidata s_namei; 63 }; 64 65 /* And its flag values */ 66 #define REMOVE 0 67 #define RMDIR 1 68 69 /* 70 * Stats structure 71 */ 72 struct nfsstats { 73 int attrcache_hits; 74 int attrcache_misses; 75 int lookupcache_hits; 76 int lookupcache_misses; 77 int rpccnt[NFS_NPROCS]; 78 int rpcretries; 79 int srvrpccnt[NFS_NPROCS]; 80 int srvrpc_errs; 81 int srv_errs; 82 }; 83 84 #ifdef KERNEL 85 struct nfsstats nfsstats; 86 #endif 87