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1.1 root 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: * @(#)nfs.h 7.11 (Berkeley) 4/19/91
37: */
38:
39: /*
40: * Tunable constants for nfs
41: */
42:
43: #define NFS_MAXIOVEC 34
44: #define NFS_HZ 10 /* Ticks per second for NFS timeouts */
45: #define NFS_TIMEO (1*NFS_HZ) /* Default timeout = 1 second */
46: #define NFS_MINTIMEO (NFS_HZ) /* Min timeout to use */
47: #define NFS_MAXTIMEO (60*NFS_HZ) /* Max timeout to backoff to */
48: #define NFS_MINIDEMTIMEO (2*NFS_HZ) /* Min timeout for non-idempotent ops*/
49: #define NFS_RELIABLETIMEO (5*NFS_HZ) /* Min timeout on reliable sockets */
50: #define NFS_MAXREXMIT 100 /* Stop counting after this many */
51: #define NFS_MAXWINDOW 1024 /* Max number of outstanding requests */
52: #define NFS_RETRANS 10 /* Num of retrans for soft mounts */
53: #define NFS_FISHY 8 /* Host not responding at this count */
54: #define NFS_ATTRTIMEO 5 /* Attribute cache timeout in sec */
55: #define NFS_WSIZE 8192 /* Def. write data size <= 8192 */
56: #define NFS_RSIZE 8192 /* Def. read data size <= 8192 */
57: #define NFS_MAXREADDIR NFS_MAXDATA /* Max. size of directory read */
58: #define NFS_MAXASYNCDAEMON 20 /* Max. number async_daemons runable */
59: #define NFS_DIRBLKSIZ 1024 /* Size of an NFS directory block */
60: #define NMOD(a) ((a) % nfs_asyncdaemons)
61:
62: /*
63: * The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts.
64: * What should be in this set is open to debate, but I believe that since
65: * I/O system calls on ufs are never interrupted by signals the set should
66: * be minimal. My reasoning is that many current programs that use signals
67: * such as SIGALRM will not expect file I/O system calls to be interrupted
68: * by them and break.
69: */
70: #define NFSINT_SIGMASK (sigmask(SIGINT)|sigmask(SIGTERM)|sigmask(SIGKILL)| \
71: sigmask(SIGHUP)|sigmask(SIGQUIT))
72:
73: /*
74: * Socket errors ignored for connectionless sockets??
75: * For now, ignore them all
76: */
77: #define NFSIGNORE_SOERROR(s, e) \
78: ((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \
79: ((s) & PR_CONNREQUIRED) == 0)
80:
81: /*
82: * Nfs outstanding request list element
83: */
84: struct nfsreq {
85: struct nfsreq *r_next;
86: struct nfsreq *r_prev;
87: struct mbuf *r_mreq;
88: struct mbuf *r_mrep;
89: struct nfsmount *r_nmp;
90: struct vnode *r_vp;
91: u_long r_xid;
92: short r_flags; /* flags on request, see below */
93: short r_retry; /* max retransmission count */
94: short r_rexmit; /* current retrans count */
95: short r_timer; /* tick counter on reply */
96: short r_timerinit; /* reinit tick counter on reply */
97: struct proc *r_procp; /* Proc that did I/O system call */
98: };
99:
100: /* Flag values for r_flags */
101: #define R_TIMING 0x01 /* timing request (in mntp) */
102: #define R_SENT 0x02 /* request has been sent */
103: #define R_SOFTTERM 0x04 /* soft mnt, too many retries */
104: #define R_INTR 0x08 /* intr mnt, signal pending */
105: #define R_SOCKERR 0x10 /* Fatal error on socket */
106: #define R_TPRINTFMSG 0x20 /* Did a tprintf msg. */
107: #define R_MUSTRESEND 0x40 /* Must resend request */
108:
109: #ifdef KERNEL
110: /*
111: * Silly rename structure that hangs off the nfsnode until the name
112: * can be removed by nfs_inactive()
113: */
114: struct sillyrename {
115: nfsv2fh_t s_fh;
116: struct ucred *s_cred;
117: struct vnode *s_dvp;
118: u_short s_namlen;
119: char s_name[20];
120: };
121:
122: /* And its flag values */
123: #define REMOVE 0
124: #define RMDIR 1
125: #endif /* KERNEL */
126:
127: /*
128: * Stats structure
129: */
130: struct nfsstats {
131: int attrcache_hits;
132: int attrcache_misses;
133: int lookupcache_hits;
134: int lookupcache_misses;
135: int direofcache_hits;
136: int direofcache_misses;
137: int biocache_reads;
138: int read_bios;
139: int read_physios;
140: int biocache_writes;
141: int write_bios;
142: int write_physios;
143: int biocache_readlinks;
144: int readlink_bios;
145: int biocache_readdirs;
146: int readdir_bios;
147: int rpccnt[NFS_NPROCS];
148: int rpcretries;
149: int srvrpccnt[NFS_NPROCS];
150: int srvrpc_errs;
151: int srv_errs;
152: int rpcrequests;
153: int rpctimeouts;
154: int rpcunexpected;
155: int rpcinvalid;
156: int srvcache_inproghits;
157: int srvcache_idemdonehits;
158: int srvcache_nonidemdonehits;
159: int srvcache_misses;
160: };
161:
162: #ifdef KERNEL
163: struct nfsstats nfsstats;
164: #endif /* KERNEL */
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