FreeBSD/Linux Kernel Cross Reference
sys/nfsclient/nfs.h
1 /*-
2 * Copyright (c) 1989, 1993, 1995
3 * The Regents of the University of California. 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 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)nfs.h 8.4 (Berkeley) 5/1/95
33 * $FreeBSD: releng/7.4/sys/nfsclient/nfs.h 214986 2010-11-08 15:22:20Z kib $
34 */
35
36 #ifndef _NFSCLIENT_NFS_H_
37 #define _NFSCLIENT_NFS_H_
38
39 #ifdef _KERNEL
40 #include "opt_nfs.h"
41 #endif
42
43 #include <nfsclient/nfsargs.h>
44
45 /*
46 * Tunable constants for nfs
47 */
48
49 #define NFS_TICKINTVL 10 /* Desired time for a tick (msec) */
50 #define NFS_HZ (hz / nfs_ticks) /* Ticks/sec */
51 #define NFS_TIMEO (1 * NFS_HZ) /* Default timeout = 1 second */
52 #define NFS_MINTIMEO (1 * NFS_HZ) /* Min timeout to use */
53 #define NFS_MAXTIMEO (60 * NFS_HZ) /* Max timeout to backoff to */
54 #define NFS_MINIDEMTIMEO (5 * NFS_HZ) /* Min timeout for non-idempotent ops*/
55 #define NFS_MAXREXMIT 100 /* Stop counting after this many */
56 #define NFS_RETRANS 10 /* Num of retrans for UDP soft mounts */
57 #define NFS_RETRANS_TCP 2 /* Num of retrans for TCP soft mounts */
58 #define NFS_MAXGRPS 16 /* Max. size of groups list */
59 #ifndef NFS_MINATTRTIMO
60 #define NFS_MINATTRTIMO 3 /* VREG attrib cache timeout in sec */
61 #endif
62 #ifndef NFS_MAXATTRTIMO
63 #define NFS_MAXATTRTIMO 60
64 #endif
65 #ifndef NFS_MINDIRATTRTIMO
66 #define NFS_MINDIRATTRTIMO 3 /* VDIR attrib cache timeout in sec */
67 #endif
68 #ifndef NFS_MAXDIRATTRTIMO
69 #define NFS_MAXDIRATTRTIMO 60
70 #endif
71 #define NFS_WSIZE 8192 /* Def. write data size <= 8192 */
72 #define NFS_RSIZE 8192 /* Def. read data size <= 8192 */
73 #define NFS_READDIRSIZE 8192 /* Def. readdir size */
74 #define NFS_DEFRAHEAD 1 /* Def. read ahead # blocks */
75 #define NFS_MAXRAHEAD 4 /* Max. read ahead # blocks */
76 #define NFS_MAXASYNCDAEMON 64 /* Max. number async_daemons runnable */
77 #define NFS_DIRBLKSIZ 4096 /* Must be a multiple of DIRBLKSIZ */
78 #ifdef _KERNEL
79 #define DIRBLKSIZ 512 /* XXX we used to use ufs's DIRBLKSIZ */
80 #endif
81 #define NFS_MAXDEADTHRESH 9 /* How long till we say 'server not responding' */
82
83 /*
84 * Oddballs
85 */
86 #define NFS_CMPFH(n, f, s) \
87 ((n)->n_fhsize == (s) && !bcmp((caddr_t)(n)->n_fhp, (caddr_t)(f), (s)))
88 #define NFS_ISV3(v) (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3)
89 #define NFS_ISV4(v) (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV4)
90
91 #define NFSSTA_HASWRITEVERF 0x00040000 /* Has write verifier for V3 */
92 #define NFSSTA_GOTFSINFO 0x00100000 /* Got the V3 fsinfo */
93 #define NFSSTA_SNDLOCK 0x01000000 /* Send socket lock */
94 #define NFSSTA_WANTSND 0x02000000 /* Want above */
95 #define NFSSTA_TIMEO 0x10000000 /* Experiencing a timeout */
96 #define NFSSTA_LOCKTIMEO 0x20000000 /* Experiencing a lockd timeout */
97
98
99 /*
100 * XXX to allow amd to include nfs.h without nfsproto.h
101 */
102 #ifdef NFS_NPROCS
103 #include <nfsclient/nfsstats.h>
104 #endif
105
106 /*
107 * vfs.nfs sysctl(3) identifiers
108 */
109 #define NFS_NFSSTATS 1 /* struct: struct nfsstats */
110
111 /*
112 * File context information for nfsv4. Currently, there is only one
113 * lockowner for the whole machine "0."
114 */
115 struct nfs4_fctx {
116 TAILQ_ENTRY(nfs4_fstate) next;
117 uint32_t refcnt;
118 struct nfs4_lowner *lop;
119 struct nfsnode *np;
120 char stateid[NFSX_V4STATEID];
121 };
122
123 #ifdef _KERNEL
124
125 #ifdef MALLOC_DECLARE
126 MALLOC_DECLARE(M_NFSREQ);
127 MALLOC_DECLARE(M_NFSDIROFF);
128 MALLOC_DECLARE(M_NFSBIGFH);
129 MALLOC_DECLARE(M_NFSHASH);
130 MALLOC_DECLARE(M_NFSDIRECTIO);
131 #endif
132
133 extern struct uma_zone *nfsmount_zone;
134
135 extern struct callout nfs_callout;
136 extern struct nfsstats nfsstats;
137 extern struct mtx nfs_iod_mtx;
138 extern struct task nfs_nfsiodnew_task;
139
140 extern int nfs_numasync;
141 extern unsigned int nfs_iodmax;
142 extern int nfs_pbuf_freecnt;
143 extern int nfs_ticks;
144
145 /* Data constants in XDR form */
146 extern u_int32_t nfs_true, nfs_false, nfs_xdrneg1;
147 extern u_int32_t rpc_reply, rpc_msgdenied, rpc_mismatch, rpc_vers;
148 extern u_int32_t rpc_auth_unix, rpc_msgaccepted, rpc_call, rpc_autherr;
149
150 extern int nfsv3_procid[NFS_NPROCS];
151
152 /*
153 * Socket errors ignored for connectionless sockets??
154 * For now, ignore them all
155 */
156 #define NFSIGNORE_SOERROR(s, e) \
157 ((e) != EINTR && (e) != EIO && \
158 (e) != ERESTART && (e) != EWOULDBLOCK && \
159 ((s) & PR_CONNREQUIRED) == 0)
160
161 /*
162 * Nfs outstanding request list element
163 */
164 struct nfsreq {
165 TAILQ_ENTRY(nfsreq) r_chain;
166 struct mbuf *r_mreq;
167 struct mbuf *r_mrep;
168 struct mbuf *r_md;
169 caddr_t r_dpos;
170 struct nfsmount *r_nmp;
171 struct vnode *r_vp;
172 u_int32_t r_xid;
173 int r_flags; /* flags on request, see below */
174 int r_retry; /* max retransmission count */
175 int r_rexmit; /* current retrans count */
176 int r_timer; /* tick counter on reply */
177 u_int32_t r_procnum; /* NFS procedure number */
178 int r_rtt; /* RTT for rpc */
179 int r_lastmsg; /* last tprintf */
180 struct thread *r_td; /* Proc that did I/O system call */
181 struct mtx r_mtx; /* Protects nfsreq fields */
182 };
183
184 /*
185 * Queue head for nfsreq's
186 */
187 extern TAILQ_HEAD(nfs_reqq, nfsreq) nfs_reqq;
188
189 /* Flag values for r_flags */
190 #define R_TIMING 0x01 /* timing request (in mntp) */
191 #define R_SENT 0x02 /* request has been sent */
192 #define R_SOFTTERM 0x04 /* soft mnt, too many retries */
193 #define R_RESENDERR 0x08 /* Resend failed */
194 #define R_SOCKERR 0x10 /* Fatal error on socket */
195 #define R_TPRINTFMSG 0x20 /* Did a tprintf msg. */
196 #define R_MUSTRESEND 0x40 /* Must resend request */
197 #define R_GETONEREP 0x80 /* Probe for one reply only */
198 #define R_PIN_REQ 0x100 /* Pin request down (rexmit in prog or other) */
199
200 struct buf;
201 struct socket;
202 struct uio;
203 struct vattr;
204
205 /*
206 * Pointers to ops that differ from v3 to v4
207 */
208 struct nfs_rpcops {
209 int (*nr_readrpc)(struct vnode *vp, struct uio *uiop,
210 struct ucred *cred);
211 int (*nr_writerpc)(struct vnode *vp, struct uio *uiop,
212 struct ucred *cred, int *iomode, int *must_commit);
213 int (*nr_writebp)(struct buf *bp, int force, struct thread *td);
214 int (*nr_readlinkrpc)(struct vnode *vp, struct uio *uiop,
215 struct ucred *cred);
216 void (*nr_invaldir)(struct vnode *vp);
217 int (*nr_commit)(struct vnode *vp, u_quad_t offset, int cnt,
218 struct ucred *cred, struct thread *td);
219 };
220
221 /*
222 * Defines for WebNFS
223 */
224
225 #define WEBNFS_ESC_CHAR '%'
226 #define WEBNFS_SPECCHAR_START 0x80
227
228 #define WEBNFS_NATIVE_CHAR 0x80
229 /*
230 * ..
231 * Possibly more here in the future.
232 */
233
234 /*
235 * Macro for converting escape characters in WebNFS pathnames.
236 * Should really be in libkern.
237 */
238
239 #define HEXTOC(c) \
240 ((c) >= 'a' ? ((c) - ('a' - 10)) : \
241 ((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - '')))
242 #define HEXSTRTOI(p) \
243 ((HEXTOC(p[0]) << 4) + HEXTOC(p[1]))
244
245 /* nfs_sigintr() helper, when 'rep' has all we need */
246 #define NFS_SIGREP(rep) nfs_sigintr((rep)->r_nmp, (rep), (rep)->r_td)
247
248 #ifdef NFS_DEBUG
249
250 extern int nfs_debug;
251 #define NFS_DEBUG_ASYNCIO 1 /* asynchronous i/o */
252 #define NFS_DEBUG_WG 2 /* server write gathering */
253 #define NFS_DEBUG_RC 4 /* server request caching */
254
255 #define NFS_DPF(cat, args) \
256 do { \
257 if (nfs_debug & NFS_DEBUG_##cat) printf args; \
258 } while (0)
259
260 #else
261
262 #define NFS_DPF(cat, args)
263
264 #endif
265
266 /*
267 * On fast networks, the estimator will try to reduce the
268 * timeout lower than the latency of the server's disks,
269 * which results in too many timeouts, so cap the lower
270 * bound.
271 */
272 #define NFS_MINRTO (NFS_HZ >> 2)
273
274 /*
275 * Keep the RTO from increasing to unreasonably large values
276 * when a server is not responding.
277 */
278 #define NFS_MAXRTO (20 * NFS_HZ)
279
280 enum nfs_rto_timer_t {
281 NFS_DEFAULT_TIMER,
282 NFS_GETATTR_TIMER,
283 NFS_LOOKUP_TIMER,
284 NFS_READ_TIMER,
285 NFS_WRITE_TIMER,
286 };
287 #define NFS_MAX_TIMER (NFS_WRITE_TIMER)
288
289 #define NFS_INITRTT (NFS_HZ << 3)
290
291 vfs_init_t nfs_init;
292 vfs_uninit_t nfs_uninit;
293 int nfs_mountroot(struct mount *mp, struct thread *td);
294
295 #ifndef NFS4_USE_RPCCLNT
296 int nfs_send(struct socket *, struct sockaddr *, struct mbuf *,
297 struct nfsreq *);
298 int nfs_connect_lock(struct nfsreq *);
299 void nfs_connect_unlock(struct nfsreq *);
300 #endif /* ! NFS4_USE_RPCCLNT */
301
302 int nfs_vinvalbuf(struct vnode *, int, struct thread *, int);
303 int nfs_readrpc(struct vnode *, struct uio *, struct ucred *);
304 int nfs_writerpc(struct vnode *, struct uio *, struct ucred *, int *,
305 int *);
306 int nfs_commit(struct vnode *vp, u_quad_t offset, int cnt,
307 struct ucred *cred, struct thread *td);
308 int nfs_readdirrpc(struct vnode *, struct uio *, struct ucred *);
309 void nfs_nfsiodnew(void);
310 void nfs_nfsiodnew_tq(__unused void *, int);
311 int nfs_asyncio(struct nfsmount *, struct buf *, struct ucred *, struct thread *);
312 int nfs_doio(struct vnode *, struct buf *, struct ucred *, struct thread *);
313 void nfs_doio_directwrite (struct buf *);
314 void nfs_up(struct nfsreq *, struct nfsmount *, struct thread *,
315 const char *, int);
316 void nfs_down(struct nfsreq *, struct nfsmount *, struct thread *,
317 const char *, int, int);
318 int nfs_readlinkrpc(struct vnode *, struct uio *, struct ucred *);
319 int nfs_sigintr(struct nfsmount *, struct nfsreq *, struct thread *);
320 int nfs_readdirplusrpc(struct vnode *, struct uio *, struct ucred *);
321 int nfs_request(struct vnode *, struct mbuf *, int, struct thread *,
322 struct ucred *, struct mbuf **, struct mbuf **, caddr_t *);
323 int nfs_loadattrcache(struct vnode **, struct mbuf **, caddr_t *,
324 struct vattr *, int);
325 int nfsm_mbuftouio(struct mbuf **, struct uio *, int, caddr_t *);
326 void nfs_nhinit(void);
327 void nfs_nhuninit(void);
328 int nfs_nmcancelreqs(struct nfsmount *);
329 void nfs_timer(void*);
330
331 int nfs_connect(struct nfsmount *, struct nfsreq *);
332 void nfs_disconnect(struct nfsmount *);
333 void nfs_safedisconnect(struct nfsmount *);
334 int nfs_getattrcache(struct vnode *, struct vattr *);
335 int nfs_iosize(struct nfsmount *nmp);
336 int nfsm_strtmbuf(struct mbuf **, char **, const char *, long);
337 int nfs_bioread(struct vnode *, struct uio *, int, struct ucred *);
338 int nfsm_uiotombuf(struct uio *, struct mbuf **, int, caddr_t *);
339 void nfs_clearcommit(struct mount *);
340 int nfs_writebp(struct buf *, int, struct thread *);
341 int nfs_fsinfo(struct nfsmount *, struct vnode *, struct ucred *,
342 struct thread *);
343 int nfs_meta_setsize (struct vnode *, struct ucred *,
344 struct thread *, u_quad_t);
345
346 void nfs_set_sigmask(struct thread *td, sigset_t *oldset);
347 void nfs_restore_sigmask(struct thread *td, sigset_t *set);
348 int nfs_msleep(struct thread *td, void *ident, struct mtx *mtx,
349 int priority, char *wmesg, int timo);
350
351 #endif /* _KERNEL */
352
353 #endif
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