Only include opt_vmpage.h if _KERNEL is defined.
[dragonfly.git] / sys / vfs / nfs / nfs_vnops.c
CommitLineData
984263bc
MD
1/*
2 * Copyright (c) 1989, 1993
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 * 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_vnops.c 8.16 (Berkeley) 5/27/95
37 * $FreeBSD: src/sys/nfs/nfs_vnops.c,v 1.150.2.5 2001/12/20 19:56:28 dillon Exp $
21739618 38 * $DragonFly: src/sys/vfs/nfs/nfs_vnops.c,v 1.31 2004/09/30 19:00:08 dillon Exp $
984263bc
MD
39 */
40
41
42/*
43 * vnode op calls for Sun NFS version 2 and 3
44 */
45
46#include "opt_inet.h"
47
48#include <sys/param.h>
49#include <sys/kernel.h>
50#include <sys/systm.h>
51#include <sys/resourcevar.h>
52#include <sys/proc.h>
53#include <sys/mount.h>
54#include <sys/buf.h>
55#include <sys/malloc.h>
56#include <sys/mbuf.h>
57#include <sys/namei.h>
58#include <sys/socket.h>
59#include <sys/vnode.h>
60#include <sys/dirent.h>
61#include <sys/fcntl.h>
62#include <sys/lockf.h>
63#include <sys/stat.h>
64#include <sys/sysctl.h>
65#include <sys/conf.h>
66
67#include <vm/vm.h>
68#include <vm/vm_extern.h>
69#include <vm/vm_zone.h>
70
3020e3be
MD
71#include <sys/buf2.h>
72
1f2de5d4 73#include <vfs/fifofs/fifo.h>
984263bc 74
1f2de5d4
MD
75#include "rpcv2.h"
76#include "nfsproto.h"
77#include "nfs.h"
1f2de5d4 78#include "nfsmount.h"
c1cf1e59 79#include "nfsnode.h"
1f2de5d4
MD
80#include "xdr_subs.h"
81#include "nfsm_subs.h"
82#include "nqnfs.h"
984263bc
MD
83
84#include <net/if.h>
85#include <netinet/in.h>
86#include <netinet/in_var.h>
87
88/* Defs */
89#define TRUE 1
90#define FALSE 0
91
92/*
93 * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these
94 * calls are not in getblk() and brelse() so that they would not be necessary
95 * here.
96 */
97#ifndef B_VMIO
98#define vfs_busy_pages(bp, f)
99#endif
100
a6ee311a
RG
101static int nfsspec_read (struct vop_read_args *);
102static int nfsspec_write (struct vop_write_args *);
103static int nfsfifo_read (struct vop_read_args *);
104static int nfsfifo_write (struct vop_write_args *);
105static int nfsspec_close (struct vop_close_args *);
106static int nfsfifo_close (struct vop_close_args *);
984263bc 107#define nfs_poll vop_nopoll
a6ee311a
RG
108static int nfs_flush (struct vnode *,int,struct thread *,int);
109static int nfs_setattrrpc (struct vnode *,struct vattr *,struct ucred *,struct thread *);
110static int nfs_lookup (struct vop_lookup_args *);
111static int nfs_create (struct vop_create_args *);
112static int nfs_mknod (struct vop_mknod_args *);
113static int nfs_open (struct vop_open_args *);
114static int nfs_close (struct vop_close_args *);
115static int nfs_access (struct vop_access_args *);
116static int nfs_getattr (struct vop_getattr_args *);
117static int nfs_setattr (struct vop_setattr_args *);
118static int nfs_read (struct vop_read_args *);
119static int nfs_mmap (struct vop_mmap_args *);
120static int nfs_fsync (struct vop_fsync_args *);
121static int nfs_remove (struct vop_remove_args *);
122static int nfs_link (struct vop_link_args *);
123static int nfs_rename (struct vop_rename_args *);
124static int nfs_mkdir (struct vop_mkdir_args *);
125static int nfs_rmdir (struct vop_rmdir_args *);
126static int nfs_symlink (struct vop_symlink_args *);
127static int nfs_readdir (struct vop_readdir_args *);
128static int nfs_bmap (struct vop_bmap_args *);
129static int nfs_strategy (struct vop_strategy_args *);
130static int nfs_lookitup (struct vnode *, const char *, int,
131 struct ucred *, struct thread *, struct nfsnode **);
132static int nfs_sillyrename (struct vnode *,struct vnode *,struct componentname *);
133static int nfsspec_access (struct vop_access_args *);
134static int nfs_readlink (struct vop_readlink_args *);
135static int nfs_print (struct vop_print_args *);
136static int nfs_advlock (struct vop_advlock_args *);
137static int nfs_bwrite (struct vop_bwrite_args *);
984263bc
MD
138/*
139 * Global vfs data structures for nfs
140 */
0961aa92 141struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = {
2d3e977e
MD
142 { &vop_default_desc, vop_defaultop },
143 { &vop_access_desc, (void *) nfs_access },
144 { &vop_advlock_desc, (void *) nfs_advlock },
145 { &vop_bmap_desc, (void *) nfs_bmap },
146 { &vop_bwrite_desc, (void *) nfs_bwrite },
147 { &vop_close_desc, (void *) nfs_close },
148 { &vop_create_desc, (void *) nfs_create },
149 { &vop_fsync_desc, (void *) nfs_fsync },
150 { &vop_getattr_desc, (void *) nfs_getattr },
151 { &vop_getpages_desc, (void *) nfs_getpages },
152 { &vop_putpages_desc, (void *) nfs_putpages },
153 { &vop_inactive_desc, (void *) nfs_inactive },
154 { &vop_islocked_desc, (void *) vop_stdislocked },
155 { &vop_lease_desc, vop_null },
156 { &vop_link_desc, (void *) nfs_link },
3446c007 157 { &vop_lock_desc, (void *) vop_stdlock },
2d3e977e
MD
158 { &vop_lookup_desc, (void *) nfs_lookup },
159 { &vop_mkdir_desc, (void *) nfs_mkdir },
160 { &vop_mknod_desc, (void *) nfs_mknod },
161 { &vop_mmap_desc, (void *) nfs_mmap },
162 { &vop_open_desc, (void *) nfs_open },
163 { &vop_poll_desc, (void *) nfs_poll },
164 { &vop_print_desc, (void *) nfs_print },
165 { &vop_read_desc, (void *) nfs_read },
166 { &vop_readdir_desc, (void *) nfs_readdir },
167 { &vop_readlink_desc, (void *) nfs_readlink },
168 { &vop_reclaim_desc, (void *) nfs_reclaim },
169 { &vop_remove_desc, (void *) nfs_remove },
170 { &vop_rename_desc, (void *) nfs_rename },
171 { &vop_rmdir_desc, (void *) nfs_rmdir },
172 { &vop_setattr_desc, (void *) nfs_setattr },
173 { &vop_strategy_desc, (void *) nfs_strategy },
174 { &vop_symlink_desc, (void *) nfs_symlink },
175 { &vop_unlock_desc, (void *) vop_stdunlock },
176 { &vop_write_desc, (void *) nfs_write },
984263bc
MD
177 { NULL, NULL }
178};
984263bc
MD
179
180/*
181 * Special device vnode ops
182 */
0961aa92 183struct vnodeopv_entry_desc nfsv2_specop_entries[] = {
2d3e977e
MD
184 { &vop_default_desc, (void *) spec_vnoperate },
185 { &vop_access_desc, (void *) nfsspec_access },
186 { &vop_close_desc, (void *) nfsspec_close },
187 { &vop_fsync_desc, (void *) nfs_fsync },
188 { &vop_getattr_desc, (void *) nfs_getattr },
189 { &vop_inactive_desc, (void *) nfs_inactive },
190 { &vop_islocked_desc, (void *) vop_stdislocked },
3446c007 191 { &vop_lock_desc, (void *) vop_stdlock },
2d3e977e
MD
192 { &vop_print_desc, (void *) nfs_print },
193 { &vop_read_desc, (void *) nfsspec_read },
194 { &vop_reclaim_desc, (void *) nfs_reclaim },
195 { &vop_setattr_desc, (void *) nfs_setattr },
196 { &vop_unlock_desc, (void *) vop_stdunlock },
197 { &vop_write_desc, (void *) nfsspec_write },
984263bc
MD
198 { NULL, NULL }
199};
984263bc 200
0961aa92 201struct vnodeopv_entry_desc nfsv2_fifoop_entries[] = {
2d3e977e
MD
202 { &vop_default_desc, (void *) fifo_vnoperate },
203 { &vop_access_desc, (void *) nfsspec_access },
204 { &vop_close_desc, (void *) nfsfifo_close },
205 { &vop_fsync_desc, (void *) nfs_fsync },
206 { &vop_getattr_desc, (void *) nfs_getattr },
207 { &vop_inactive_desc, (void *) nfs_inactive },
208 { &vop_islocked_desc, (void *) vop_stdislocked },
3446c007 209 { &vop_lock_desc, (void *) vop_stdlock },
2d3e977e
MD
210 { &vop_print_desc, (void *) nfs_print },
211 { &vop_read_desc, (void *) nfsfifo_read },
212 { &vop_reclaim_desc, (void *) nfs_reclaim },
213 { &vop_setattr_desc, (void *) nfs_setattr },
214 { &vop_unlock_desc, (void *) vop_stdunlock },
215 { &vop_write_desc, (void *) nfsfifo_write },
984263bc
MD
216 { NULL, NULL }
217};
984263bc 218
a6ee311a 219static int nfs_mknodrpc (struct vnode *dvp, struct vnode **vpp,
984263bc 220 struct componentname *cnp,
a6ee311a
RG
221 struct vattr *vap);
222static int nfs_removerpc (struct vnode *dvp, const char *name,
984263bc 223 int namelen,
a6ee311a
RG
224 struct ucred *cred, struct thread *td);
225static int nfs_renamerpc (struct vnode *fdvp, const char *fnameptr,
984263bc
MD
226 int fnamelen, struct vnode *tdvp,
227 const char *tnameptr, int tnamelen,
a6ee311a
RG
228 struct ucred *cred, struct thread *td);
229static int nfs_renameit (struct vnode *sdvp,
984263bc 230 struct componentname *scnp,
a6ee311a 231 struct sillyrename *sp);
984263bc
MD
232
233/*
234 * Global variables
235 */
236extern u_int32_t nfs_true, nfs_false;
237extern u_int32_t nfs_xdrneg1;
238extern struct nfsstats nfsstats;
239extern nfstype nfsv3_type[9];
dadab5e9 240struct thread *nfs_iodwant[NFS_MAXASYNCDAEMON];
984263bc
MD
241struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON];
242int nfs_numasync = 0;
243#define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1))
244
245SYSCTL_DECL(_vfs_nfs);
246
247static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
248SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
249 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
250
4d17b298
MD
251static int nfsneg_cache_timeout = NFS_MINATTRTIMO;
252SYSCTL_INT(_vfs_nfs, OID_AUTO, neg_cache_timeout, CTLFLAG_RW,
253 &nfsneg_cache_timeout, 0, "NFS NEGATIVE ACCESS cache timeout");
254
984263bc
MD
255static int nfsv3_commit_on_close = 0;
256SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
257 &nfsv3_commit_on_close, 0, "write+commit on close, else only write");
258#if 0
259SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
260 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
261
262SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
263 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
264#endif
265
266#define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \
267 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \
268 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP)
269static int
dadab5e9 270nfs3_access_otw(struct vnode *vp, int wmode,
e851b29e 271 struct thread *td, struct ucred *cred)
984263bc
MD
272{
273 const int v3 = 1;
274 u_int32_t *tl;
275 int error = 0, attrflag;
276
277 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
278 caddr_t bpos, dpos, cp2;
40393ded
RG
279 int32_t t1, t2;
280 caddr_t cp;
984263bc
MD
281 u_int32_t rmode;
282 struct nfsnode *np = VTONFS(vp);
283
284 nfsstats.rpccnt[NFSPROC_ACCESS]++;
285 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED);
286 nfsm_fhtom(vp, v3);
287 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
288 *tl = txdr_unsigned(wmode);
dadab5e9 289 nfsm_request(vp, NFSPROC_ACCESS, td, cred);
984263bc
MD
290 nfsm_postop_attr(vp, attrflag);
291 if (!error) {
292 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
293 rmode = fxdr_unsigned(u_int32_t, *tl);
294 np->n_mode = rmode;
295 np->n_modeuid = cred->cr_uid;
3a6f9faf 296 np->n_modestamp = mycpu->gd_time_seconds;
984263bc 297 }
6b08710e
MD
298 m_freem(mrep);
299nfsmout:
984263bc
MD
300 return error;
301}
302
303/*
304 * nfs access vnode op.
305 * For nfs version 2, just return ok. File accesses may fail later.
306 * For nfs version 3, use the access rpc to check accessibility. If file modes
307 * are changed on the server, accesses might still fail later.
e851b29e
CP
308 *
309 * nfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
310 * struct thread *a_td)
984263bc
MD
311 */
312static int
e851b29e 313nfs_access(struct vop_access_args *ap)
984263bc 314{
40393ded 315 struct vnode *vp = ap->a_vp;
984263bc
MD
316 int error = 0;
317 u_int32_t mode, wmode;
318 int v3 = NFS_ISV3(vp);
319 struct nfsnode *np = VTONFS(vp);
320
321 /*
322 * Disallow write attempts on filesystems mounted read-only;
323 * unless the file is a socket, fifo, or a block or character
324 * device resident on the filesystem.
325 */
326 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
327 switch (vp->v_type) {
328 case VREG:
329 case VDIR:
330 case VLNK:
331 return (EROFS);
332 default:
333 break;
334 }
335 }
336 /*
337 * For nfs v3, check to see if we have done this recently, and if
338 * so return our cached result instead of making an ACCESS call.
339 * If not, do an access rpc, otherwise you are stuck emulating
340 * ufs_access() locally using the vattr. This may not be correct,
341 * since the server may apply other access criteria such as
342 * client uid-->server uid mapping that we do not know about.
343 */
344 if (v3) {
345 if (ap->a_mode & VREAD)
346 mode = NFSV3ACCESS_READ;
347 else
348 mode = 0;
349 if (vp->v_type != VDIR) {
350 if (ap->a_mode & VWRITE)
351 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
352 if (ap->a_mode & VEXEC)
353 mode |= NFSV3ACCESS_EXECUTE;
354 } else {
355 if (ap->a_mode & VWRITE)
356 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
357 NFSV3ACCESS_DELETE);
358 if (ap->a_mode & VEXEC)
359 mode |= NFSV3ACCESS_LOOKUP;
360 }
361 /* XXX safety belt, only make blanket request if caching */
362 if (nfsaccess_cache_timeout > 0) {
363 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY |
364 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE |
365 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP;
366 } else {
367 wmode = mode;
368 }
369
370 /*
371 * Does our cached result allow us to give a definite yes to
372 * this request?
373 */
3a6f9faf 374 if ((mycpu->gd_time_seconds < (np->n_modestamp + nfsaccess_cache_timeout)) &&
984263bc
MD
375 (ap->a_cred->cr_uid == np->n_modeuid) &&
376 ((np->n_mode & mode) == mode)) {
377 nfsstats.accesscache_hits++;
378 } else {
379 /*
380 * Either a no, or a don't know. Go to the wire.
381 */
382 nfsstats.accesscache_misses++;
dadab5e9 383 error = nfs3_access_otw(vp, wmode, ap->a_td,ap->a_cred);
984263bc
MD
384 if (!error) {
385 if ((np->n_mode & mode) != mode) {
386 error = EACCES;
387 }
388 }
389 }
984263bc
MD
390 } else {
391 if ((error = nfsspec_access(ap)) != 0)
392 return (error);
393
394 /*
395 * Attempt to prevent a mapped root from accessing a file
396 * which it shouldn't. We try to read a byte from the file
397 * if the user is root and the file is not zero length.
398 * After calling nfsspec_access, we should have the correct
399 * file size cached.
400 */
401 if (ap->a_cred->cr_uid == 0 && (ap->a_mode & VREAD)
402 && VTONFS(vp)->n_size > 0) {
403 struct iovec aiov;
404 struct uio auio;
405 char buf[1];
406
407 aiov.iov_base = buf;
408 aiov.iov_len = 1;
409 auio.uio_iov = &aiov;
410 auio.uio_iovcnt = 1;
411 auio.uio_offset = 0;
412 auio.uio_resid = 1;
413 auio.uio_segflg = UIO_SYSSPACE;
414 auio.uio_rw = UIO_READ;
dadab5e9 415 auio.uio_td = ap->a_td;
984263bc 416
c1cf1e59 417 if (vp->v_type == VREG) {
3b568787 418 error = nfs_readrpc(vp, &auio);
c1cf1e59 419 } else if (vp->v_type == VDIR) {
984263bc
MD
420 char* bp;
421 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
422 aiov.iov_base = bp;
423 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
3b568787 424 error = nfs_readdirrpc(vp, &auio);
984263bc 425 free(bp, M_TEMP);
c1cf1e59 426 } else if (vp->v_type == VLNK) {
3b568787 427 error = nfs_readlinkrpc(vp, &auio);
c1cf1e59 428 } else {
984263bc 429 error = EACCES;
c1cf1e59 430 }
984263bc 431 }
984263bc 432 }
c1cf1e59
MD
433 /*
434 * [re]record creds for reading and/or writing if access
09b1ee9b
MD
435 * was granted. Assume the NFS server will grant read access
436 * for execute requests.
c1cf1e59
MD
437 */
438 if (error == 0) {
09b1ee9b 439 if ((ap->a_mode & (VREAD|VEXEC)) && ap->a_cred != np->n_rucred) {
c1cf1e59
MD
440 crhold(ap->a_cred);
441 if (np->n_rucred)
442 crfree(np->n_rucred);
443 np->n_rucred = ap->a_cred;
444 }
445 if ((ap->a_mode & VWRITE) && ap->a_cred != np->n_wucred) {
446 crhold(ap->a_cred);
447 if (np->n_wucred)
448 crfree(np->n_wucred);
449 np->n_wucred = ap->a_cred;
450 }
451 }
452 return(error);
984263bc
MD
453}
454
455/*
456 * nfs open vnode op
457 * Check to see if the type is ok
458 * and that deletion is not in progress.
459 * For paged in text files, you will need to flush the page cache
460 * if consistency is lost.
e851b29e
CP
461 *
462 * nfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
463 * struct thread *a_td)
984263bc
MD
464 */
465/* ARGSUSED */
466static int
e851b29e 467nfs_open(struct vop_open_args *ap)
984263bc 468{
40393ded 469 struct vnode *vp = ap->a_vp;
984263bc
MD
470 struct nfsnode *np = VTONFS(vp);
471 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
472 struct vattr vattr;
473 int error;
474
475 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
476#ifdef DIAGNOSTIC
477 printf("open eacces vtyp=%d\n",vp->v_type);
478#endif
ca3a2b2f 479 return (EOPNOTSUPP);
984263bc
MD
480 }
481 /*
482 * Get a valid lease. If cached data is stale, flush it.
483 */
484 if (nmp->nm_flag & NFSMNT_NQNFS) {
485 if (NQNFS_CKINVALID(vp, np, ND_READ)) {
486 do {
3b568787 487 error = nqnfs_getlease(vp, ND_READ, ap->a_td);
984263bc
MD
488 } while (error == NQNFS_EXPIRED);
489 if (error)
490 return (error);
491 if (np->n_lrev != np->n_brev ||
492 (np->n_flag & NQNFSNONCACHE)) {
3b568787
MD
493 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1))
494 == EINTR) {
984263bc 495 return (error);
3b568787 496 }
984263bc
MD
497 np->n_brev = np->n_lrev;
498 }
499 }
500 } else {
501 if (np->n_flag & NMODIFIED) {
3b568787
MD
502 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1))
503 == EINTR) {
984263bc 504 return (error);
3b568787 505 }
984263bc
MD
506 np->n_attrstamp = 0;
507 if (vp->v_type == VDIR)
508 np->n_direofoffset = 0;
3b568787 509 error = VOP_GETATTR(vp, &vattr, ap->a_td);
984263bc
MD
510 if (error)
511 return (error);
512 np->n_mtime = vattr.va_mtime.tv_sec;
513 } else {
3b568787 514 error = VOP_GETATTR(vp, &vattr, ap->a_td);
984263bc
MD
515 if (error)
516 return (error);
517 if (np->n_mtime != vattr.va_mtime.tv_sec) {
518 if (vp->v_type == VDIR)
519 np->n_direofoffset = 0;
520 if ((error = nfs_vinvalbuf(vp, V_SAVE,
3b568787 521 ap->a_td, 1)) == EINTR) {
984263bc 522 return (error);
3b568787 523 }
984263bc
MD
524 np->n_mtime = vattr.va_mtime.tv_sec;
525 }
526 }
527 }
528 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0)
529 np->n_attrstamp = 0; /* For Open/Close consistency */
530 return (0);
531}
532
533/*
534 * nfs close vnode op
535 * What an NFS client should do upon close after writing is a debatable issue.
536 * Most NFS clients push delayed writes to the server upon close, basically for
537 * two reasons:
538 * 1 - So that any write errors may be reported back to the client process
539 * doing the close system call. By far the two most likely errors are
540 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
541 * 2 - To put a worst case upper bound on cache inconsistency between
542 * multiple clients for the file.
543 * There is also a consistency problem for Version 2 of the protocol w.r.t.
544 * not being able to tell if other clients are writing a file concurrently,
545 * since there is no way of knowing if the changed modify time in the reply
546 * is only due to the write for this client.
547 * (NFS Version 3 provides weak cache consistency data in the reply that
548 * should be sufficient to detect and handle this case.)
549 *
550 * The current code does the following:
551 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
552 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
553 * or commit them (this satisfies 1 and 2 except for the
554 * case where the server crashes after this close but
555 * before the commit RPC, which is felt to be "good
556 * enough". Changing the last argument to nfs_flush() to
557 * a 1 would force a commit operation, if it is felt a
558 * commit is necessary now.
559 * for NQNFS - do nothing now, since 2 is dealt with via leases and
560 * 1 should be dealt with via an fsync() system call for
561 * cases where write errors are important.
e851b29e
CP
562 *
563 * nfs_close(struct vnodeop_desc *a_desc, struct vnode *a_vp, int a_fflag,
564 * struct ucred *a_cred, struct thread *a_td)
984263bc
MD
565 */
566/* ARGSUSED */
567static int
e851b29e 568nfs_close(struct vop_close_args *ap)
984263bc 569{
40393ded
RG
570 struct vnode *vp = ap->a_vp;
571 struct nfsnode *np = VTONFS(vp);
984263bc
MD
572 int error = 0;
573
574 if (vp->v_type == VREG) {
575 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 &&
576 (np->n_flag & NMODIFIED)) {
577 if (NFS_ISV3(vp)) {
578 /*
579 * Under NFSv3 we have dirty buffers to dispose of. We
580 * must flush them to the NFS server. We have the option
581 * of waiting all the way through the commit rpc or just
582 * waiting for the initial write. The default is to only
583 * wait through the initial write so the data is in the
584 * server's cache, which is roughly similar to the state
585 * a standard disk subsystem leaves the file in on close().
586 *
587 * We cannot clear the NMODIFIED bit in np->n_flag due to
588 * potential races with other processes, and certainly
589 * cannot clear it if we don't commit.
590 */
591 int cm = nfsv3_commit_on_close ? 1 : 0;
3b568787 592 error = nfs_flush(vp, MNT_WAIT, ap->a_td, cm);
984263bc
MD
593 /* np->n_flag &= ~NMODIFIED; */
594 } else {
3b568787 595 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
984263bc
MD
596 }
597 np->n_attrstamp = 0;
598 }
599 if (np->n_flag & NWRITEERR) {
600 np->n_flag &= ~NWRITEERR;
601 error = np->n_error;
602 }
603 }
604 return (error);
605}
606
607/*
608 * nfs getattr call from vfs.
e851b29e
CP
609 *
610 * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred,
611 * struct thread *a_td)
984263bc
MD
612 */
613static int
e851b29e 614nfs_getattr(struct vop_getattr_args *ap)
984263bc 615{
40393ded
RG
616 struct vnode *vp = ap->a_vp;
617 struct nfsnode *np = VTONFS(vp);
618 caddr_t cp;
619 u_int32_t *tl;
620 int32_t t1, t2;
984263bc
MD
621 caddr_t bpos, dpos;
622 int error = 0;
623 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
624 int v3 = NFS_ISV3(vp);
625
626 /*
627 * Update local times for special files.
628 */
629 if (np->n_flag & (NACC | NUPD))
630 np->n_flag |= NCHG;
631 /*
632 * First look in the cache.
633 */
634 if (nfs_getattrcache(vp, ap->a_vap) == 0)
635 return (0);
636
637 if (v3 && nfsaccess_cache_timeout > 0) {
638 nfsstats.accesscache_misses++;
c1cf1e59 639 nfs3_access_otw(vp, NFSV3ACCESS_ALL, ap->a_td, nfs_vpcred(vp, ND_CHECK));
984263bc
MD
640 if (nfs_getattrcache(vp, ap->a_vap) == 0)
641 return (0);
642 }
643
644 nfsstats.rpccnt[NFSPROC_GETATTR]++;
645 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3));
646 nfsm_fhtom(vp, v3);
c1cf1e59 647 nfsm_request(vp, NFSPROC_GETATTR, ap->a_td, nfs_vpcred(vp, ND_CHECK));
984263bc
MD
648 if (!error) {
649 nfsm_loadattr(vp, ap->a_vap);
650 }
6b08710e
MD
651 m_freem(mrep);
652nfsmout:
984263bc
MD
653 return (error);
654}
655
656/*
657 * nfs setattr call.
e851b29e
CP
658 *
659 * nfs_setattr(struct vnodeop_desc *a_desc, struct vnode *a_vp,
660 * struct vattr *a_vap, struct ucred *a_cred,
661 * struct thread *a_td)
984263bc
MD
662 */
663static int
e851b29e 664nfs_setattr(struct vop_setattr_args *ap)
984263bc 665{
40393ded
RG
666 struct vnode *vp = ap->a_vp;
667 struct nfsnode *np = VTONFS(vp);
668 struct vattr *vap = ap->a_vap;
984263bc
MD
669 int error = 0;
670 u_quad_t tsize;
671
672#ifndef nolint
673 tsize = (u_quad_t)0;
674#endif
675
676 /*
677 * Setting of flags is not supported.
678 */
679 if (vap->va_flags != VNOVAL)
680 return (EOPNOTSUPP);
681
682 /*
683 * Disallow write attempts if the filesystem is mounted read-only.
684 */
685 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
686 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
687 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
688 (vp->v_mount->mnt_flag & MNT_RDONLY))
689 return (EROFS);
690 if (vap->va_size != VNOVAL) {
691 switch (vp->v_type) {
692 case VDIR:
693 return (EISDIR);
694 case VCHR:
695 case VBLK:
696 case VSOCK:
697 case VFIFO:
698 if (vap->va_mtime.tv_sec == VNOVAL &&
699 vap->va_atime.tv_sec == VNOVAL &&
700 vap->va_mode == (mode_t)VNOVAL &&
701 vap->va_uid == (uid_t)VNOVAL &&
702 vap->va_gid == (gid_t)VNOVAL)
703 return (0);
704 vap->va_size = VNOVAL;
705 break;
706 default:
707 /*
708 * Disallow write attempts if the filesystem is
709 * mounted read-only.
710 */
711 if (vp->v_mount->mnt_flag & MNT_RDONLY)
712 return (EROFS);
713
714 /*
715 * We run vnode_pager_setsize() early (why?),
716 * we must set np->n_size now to avoid vinvalbuf
717 * V_SAVE races that might setsize a lower
718 * value.
719 */
720
721 tsize = np->n_size;
3b568787 722 error = nfs_meta_setsize(vp, ap->a_td, vap->va_size);
984263bc
MD
723
724 if (np->n_flag & NMODIFIED) {
725 if (vap->va_size == 0)
3b568787 726 error = nfs_vinvalbuf(vp, 0, ap->a_td, 1);
984263bc 727 else
3b568787 728 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
984263bc
MD
729 if (error) {
730 np->n_size = tsize;
731 vnode_pager_setsize(vp, np->n_size);
732 return (error);
733 }
734 }
8d429613
MD
735 /*
736 * np->n_size has already been set to vap->va_size
b07fc55c
DR
737 * in nfs_meta_setsize(). We must set it again since
738 * nfs_loadattrcache() could be called through
739 * nfs_meta_setsize() and could modify np->n_size.
8d429613
MD
740 *
741 * (note that nfs_loadattrcache() will have called
742 * vnode_pager_setsize() for us in that case).
b07fc55c
DR
743 */
744 np->n_vattr.va_size = np->n_size = vap->va_size;
745 };
984263bc
MD
746 } else if ((vap->va_mtime.tv_sec != VNOVAL ||
747 vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) &&
748 vp->v_type == VREG &&
3b568787 749 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1)) == EINTR)
984263bc 750 return (error);
dadab5e9 751 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_td);
984263bc
MD
752 if (error && vap->va_size != VNOVAL) {
753 np->n_size = np->n_vattr.va_size = tsize;
754 vnode_pager_setsize(vp, np->n_size);
755 }
756 return (error);
757}
758
759/*
760 * Do an nfs setattr rpc.
761 */
762static int
dadab5e9 763nfs_setattrrpc(struct vnode *vp, struct vattr *vap,
e851b29e 764 struct ucred *cred, struct thread *td)
984263bc 765{
40393ded 766 struct nfsv2_sattr *sp;
999914df 767 struct nfsnode *np = VTONFS(vp);
40393ded
RG
768 caddr_t cp;
769 int32_t t1, t2;
984263bc
MD
770 caddr_t bpos, dpos, cp2;
771 u_int32_t *tl;
772 int error = 0, wccflag = NFSV3_WCCRATTR;
773 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
774 int v3 = NFS_ISV3(vp);
775
776 nfsstats.rpccnt[NFSPROC_SETATTR]++;
777 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3));
778 nfsm_fhtom(vp, v3);
779 if (v3) {
780 nfsm_v3attrbuild(vap, TRUE);
781 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
782 *tl = nfs_false;
783 } else {
784 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
785 if (vap->va_mode == (mode_t)VNOVAL)
786 sp->sa_mode = nfs_xdrneg1;
787 else
788 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
789 if (vap->va_uid == (uid_t)VNOVAL)
790 sp->sa_uid = nfs_xdrneg1;
791 else
792 sp->sa_uid = txdr_unsigned(vap->va_uid);
793 if (vap->va_gid == (gid_t)VNOVAL)
794 sp->sa_gid = nfs_xdrneg1;
795 else
796 sp->sa_gid = txdr_unsigned(vap->va_gid);
797 sp->sa_size = txdr_unsigned(vap->va_size);
798 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
799 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
800 }
dadab5e9 801 nfsm_request(vp, NFSPROC_SETATTR, td, cred);
984263bc 802 if (v3) {
999914df 803 np->n_modestamp = 0;
984263bc
MD
804 nfsm_wcc_data(vp, wccflag);
805 } else
806 nfsm_loadattr(vp, (struct vattr *)0);
6b08710e
MD
807 m_freem(mrep);
808nfsmout:
984263bc
MD
809 return (error);
810}
811
812/*
4d17b298 813 * 'cached' nfs directory lookup
e851b29e
CP
814 *
815 * nfs_lookup(struct vnodeop_desc *a_desc, struct vnode *a_dvp,
816 * struct vnode **a_vpp, struct componentname *a_cnp)
984263bc
MD
817 */
818static int
e851b29e 819nfs_lookup(struct vop_lookup_args *ap)
984263bc
MD
820{
821 struct componentname *cnp = ap->a_cnp;
822 struct vnode *dvp = ap->a_dvp;
823 struct vnode **vpp = ap->a_vpp;
824 int flags = cnp->cn_flags;
825 struct vnode *newvp;
826 u_int32_t *tl;
827 caddr_t cp;
828 int32_t t1, t2;
829 struct nfsmount *nmp;
830 caddr_t bpos, dpos, cp2;
831 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
832 long len;
833 nfsfh_t *fhp;
834 struct nfsnode *np;
835 int lockparent, wantparent, error = 0, attrflag, fhsize;
836 int v3 = NFS_ISV3(dvp);
dadab5e9 837 struct thread *td = cnp->cn_td;
984263bc 838
4d17b298
MD
839 /*
840 * Read-only mount check and directory check.
841 */
984263bc 842 *vpp = NULLVP;
2b69e610
MD
843 if ((flags & CNP_ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
844 (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME))
984263bc 845 return (EROFS);
4d17b298 846
984263bc
MD
847 if (dvp->v_type != VDIR)
848 return (ENOTDIR);
4d17b298
MD
849
850 /*
851 * Look it up in the cache. Note that ENOENT is only returned if we
852 * previously entered a negative hit (see later on). The additional
853 * nfsneg_cache_timeout check causes previously cached results to
854 * be instantly ignored if the negative caching is turned off.
855 */
2b69e610
MD
856 lockparent = flags & CNP_LOCKPARENT;
857 wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT);
984263bc
MD
858 nmp = VFSTONFS(dvp->v_mount);
859 np = VTONFS(dvp);
14c92d03 860 error = cache_lookup(dvp, vpp, cnp);
4d17b298 861 if (error != 0) {
984263bc
MD
862 struct vattr vattr;
863 int vpid;
864
4d17b298
MD
865 if (error == ENOENT && nfsneg_cache_timeout) {
866 *vpp = NULLVP;
867 return (error);
868 }
dadab5e9 869 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0) {
984263bc
MD
870 *vpp = NULLVP;
871 return (error);
872 }
873
874 newvp = *vpp;
875 vpid = newvp->v_id;
876 /*
877 * See the comment starting `Step through' in ufs/ufs_lookup.c
878 * for an explanation of the locking protocol
879 */
880 if (dvp == newvp) {
597aea93 881 vref(newvp);
984263bc 882 error = 0;
2b69e610 883 } else if (flags & CNP_ISDOTDOT) {
41a01a4d 884 VOP_UNLOCK(dvp, NULL, 0, td);
7ab77df6 885 cnp->cn_flags |= CNP_PDIRUNLOCK;
41a01a4d 886 error = vget(newvp, NULL, LK_EXCLUSIVE, td);
7ab77df6 887 if (!error && lockparent && (flags & CNP_ISLASTCN)) {
41a01a4d 888 error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td);
7ab77df6
MD
889 if (error == 0)
890 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
891 }
984263bc 892 } else {
41a01a4d 893 error = vget(newvp, NULL, LK_EXCLUSIVE, td);
7ab77df6 894 if (!lockparent || error || !(flags & CNP_ISLASTCN)) {
41a01a4d 895 VOP_UNLOCK(dvp, NULL, 0, td);
7ab77df6
MD
896 cnp->cn_flags |= CNP_PDIRUNLOCK;
897 }
984263bc
MD
898 }
899 if (!error) {
900 if (vpid == newvp->v_id) {
3b568787 901 if (!VOP_GETATTR(newvp, &vattr, td)
984263bc
MD
902 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) {
903 nfsstats.lookupcache_hits++;
2b69e610
MD
904 if (cnp->cn_nameiop != NAMEI_LOOKUP &&
905 (flags & CNP_ISLASTCN))
906 cnp->cn_flags |= CNP_SAVENAME;
984263bc
MD
907 return (0);
908 }
909 cache_purge(newvp);
910 }
911 vput(newvp);
7ab77df6 912 if (lockparent && dvp != newvp && (flags & CNP_ISLASTCN)) {
41a01a4d 913 VOP_UNLOCK(dvp, NULL, 0, td);
7ab77df6
MD
914 cnp->cn_flags |= CNP_PDIRUNLOCK;
915 }
984263bc 916 }
41a01a4d 917 error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td);
7ab77df6
MD
918 if (error == 0)
919 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
984263bc
MD
920 *vpp = NULLVP;
921 if (error)
922 return (error);
923 }
4d17b298
MD
924
925 /*
926 * Cache miss, go the wire.
927 */
984263bc
MD
928 error = 0;
929 newvp = NULLVP;
930 nfsstats.lookupcache_misses++;
931 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
932 len = cnp->cn_namelen;
933 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
934 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
935 nfsm_fhtom(dvp, v3);
936 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
dadab5e9 937 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_td, cnp->cn_cred);
984263bc 938 if (error) {
4d17b298
MD
939 /*
940 * Cache negatve lookups to reduce NFS traffic, but use
941 * a fast timeout.
942 */
943 if (error == ENOENT &&
944 (cnp->cn_flags & CNP_MAKEENTRY) &&
945 cnp->cn_nameiop == NAMEI_LOOKUP &&
946 nfsneg_cache_timeout) {
947 int toval = nfsneg_cache_timeout * hz;
948 if (cnp->cn_flags & CNP_CACHETIMEOUT) {
949 if (cnp->cn_timeout > toval)
950 cnp->cn_timeout = toval;
951 } else {
952 cnp->cn_flags |= CNP_CACHETIMEOUT;
953 cnp->cn_timeout = toval;
954 }
21739618 955 cache_enter(dvp, NULL, cnp);
4d17b298 956 }
984263bc
MD
957 nfsm_postop_attr(dvp, attrflag);
958 m_freem(mrep);
959 goto nfsmout;
960 }
961 nfsm_getfh(fhp, fhsize, v3);
962
963 /*
964 * Handle RENAME case...
965 */
2b69e610 966 if (cnp->cn_nameiop == NAMEI_RENAME && wantparent && (flags & CNP_ISLASTCN)) {
984263bc
MD
967 if (NFS_CMPFH(np, fhp, fhsize)) {
968 m_freem(mrep);
969 return (EISDIR);
970 }
971 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
972 if (error) {
973 m_freem(mrep);
974 return (error);
975 }
976 newvp = NFSTOV(np);
977 if (v3) {
978 nfsm_postop_attr(newvp, attrflag);
979 nfsm_postop_attr(dvp, attrflag);
980 } else
981 nfsm_loadattr(newvp, (struct vattr *)0);
982 *vpp = newvp;
983 m_freem(mrep);
2b69e610 984 cnp->cn_flags |= CNP_SAVENAME;
7ab77df6 985 if (!lockparent) {
41a01a4d 986 VOP_UNLOCK(dvp, NULL, 0, td);
7ab77df6
MD
987 cnp->cn_flags |= CNP_PDIRUNLOCK;
988 }
984263bc
MD
989 return (0);
990 }
991
2b69e610 992 if (flags & CNP_ISDOTDOT) {
41a01a4d 993 VOP_UNLOCK(dvp, NULL, 0, td);
7ab77df6 994 cnp->cn_flags |= CNP_PDIRUNLOCK;
984263bc
MD
995 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
996 if (error) {
41a01a4d 997 vn_lock(dvp, NULL, LK_EXCLUSIVE | LK_RETRY, td);
7ab77df6
MD
998 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
999 return (error); /* NOTE: return error from nget */
984263bc
MD
1000 }
1001 newvp = NFSTOV(np);
7ab77df6
MD
1002 if (lockparent && (flags & CNP_ISLASTCN)) {
1003 error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td);
1004 if (error) {
1005 vput(newvp);
1006 return (error);
1007 }
1008 cnp->cn_flags |= CNP_PDIRUNLOCK;
984263bc
MD
1009 }
1010 } else if (NFS_CMPFH(np, fhp, fhsize)) {
597aea93 1011 vref(dvp);
984263bc
MD
1012 newvp = dvp;
1013 } else {
1014 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1015 if (error) {
1016 m_freem(mrep);
1017 return (error);
1018 }
7ab77df6 1019 if (!lockparent || !(flags & CNP_ISLASTCN)) {
41a01a4d 1020 VOP_UNLOCK(dvp, NULL, 0, td);
7ab77df6
MD
1021 cnp->cn_flags |= CNP_PDIRUNLOCK;
1022 }
984263bc
MD
1023 newvp = NFSTOV(np);
1024 }
1025 if (v3) {
1026 nfsm_postop_attr(newvp, attrflag);
1027 nfsm_postop_attr(dvp, attrflag);
1028 } else
1029 nfsm_loadattr(newvp, (struct vattr *)0);
2b69e610
MD
1030 if (cnp->cn_nameiop != NAMEI_LOOKUP && (flags & CNP_ISLASTCN))
1031 cnp->cn_flags |= CNP_SAVENAME;
1032 if ((cnp->cn_flags & CNP_MAKEENTRY) &&
1033 (cnp->cn_nameiop != NAMEI_DELETE || !(flags & CNP_ISLASTCN))) {
984263bc 1034 np->n_ctime = np->n_vattr.va_ctime.tv_sec;
21739618 1035 cache_enter(dvp, newvp, cnp);
984263bc
MD
1036 }
1037 *vpp = newvp;
6b08710e
MD
1038 m_freem(mrep);
1039nfsmout:
984263bc
MD
1040 if (error) {
1041 if (newvp != NULLVP) {
1042 vrele(newvp);
1043 *vpp = NULLVP;
1044 }
2b69e610
MD
1045 if ((cnp->cn_nameiop == NAMEI_CREATE || cnp->cn_nameiop == NAMEI_RENAME) &&
1046 (flags & CNP_ISLASTCN) && error == ENOENT) {
7ab77df6 1047 if (!lockparent) {
41a01a4d 1048 VOP_UNLOCK(dvp, NULL, 0, td);
7ab77df6
MD
1049 cnp->cn_flags |= CNP_PDIRUNLOCK;
1050 }
984263bc
MD
1051 if (dvp->v_mount->mnt_flag & MNT_RDONLY)
1052 error = EROFS;
1053 else
1054 error = EJUSTRETURN;
1055 }
2b69e610
MD
1056 if (cnp->cn_nameiop != NAMEI_LOOKUP && (flags & CNP_ISLASTCN))
1057 cnp->cn_flags |= CNP_SAVENAME;
984263bc
MD
1058 }
1059 return (error);
1060}
1061
1062/*
1063 * nfs read call.
1064 * Just call nfs_bioread() to do the work.
e851b29e
CP
1065 *
1066 * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1067 * struct ucred *a_cred)
984263bc
MD
1068 */
1069static int
e851b29e 1070nfs_read(struct vop_read_args *ap)
984263bc 1071{
40393ded 1072 struct vnode *vp = ap->a_vp;
984263bc 1073
3b568787 1074 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
ca3a2b2f
HP
1075 switch (vp->v_type) {
1076 case VREG:
1077 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
1078 case VDIR:
1079 return (EISDIR);
1080 default:
1081 return EOPNOTSUPP;
1082 }
984263bc
MD
1083}
1084
1085/*
1086 * nfs readlink call
e851b29e
CP
1087 *
1088 * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
984263bc
MD
1089 */
1090static int
e851b29e 1091nfs_readlink(struct vop_readlink_args *ap)
984263bc 1092{
40393ded 1093 struct vnode *vp = ap->a_vp;
984263bc
MD
1094
1095 if (vp->v_type != VLNK)
1096 return (EINVAL);
3b568787 1097 return (nfs_bioread(vp, ap->a_uio, 0));
984263bc
MD
1098}
1099
1100/*
1101 * Do a readlink rpc.
1102 * Called by nfs_doio() from below the buffer cache.
1103 */
1104int
3b568787 1105nfs_readlinkrpc(struct vnode *vp, struct uio *uiop)
984263bc 1106{
40393ded
RG
1107 u_int32_t *tl;
1108 caddr_t cp;
1109 int32_t t1, t2;
984263bc
MD
1110 caddr_t bpos, dpos, cp2;
1111 int error = 0, len, attrflag;
1112 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1113 int v3 = NFS_ISV3(vp);
1114
1115 nfsstats.rpccnt[NFSPROC_READLINK]++;
1116 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3));
1117 nfsm_fhtom(vp, v3);
c1cf1e59 1118 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_td, nfs_vpcred(vp, ND_CHECK));
984263bc
MD
1119 if (v3)
1120 nfsm_postop_attr(vp, attrflag);
1121 if (!error) {
1122 nfsm_strsiz(len, NFS_MAXPATHLEN);
1123 if (len == NFS_MAXPATHLEN) {
1124 struct nfsnode *np = VTONFS(vp);
1125 if (np->n_size && np->n_size < NFS_MAXPATHLEN)
1126 len = np->n_size;
1127 }
1128 nfsm_mtouio(uiop, len);
1129 }
6b08710e
MD
1130 m_freem(mrep);
1131nfsmout:
984263bc
MD
1132 return (error);
1133}
1134
1135/*
1136 * nfs read rpc call
1137 * Ditto above
1138 */
1139int
3b568787 1140nfs_readrpc(struct vnode *vp, struct uio *uiop)
984263bc 1141{
40393ded
RG
1142 u_int32_t *tl;
1143 caddr_t cp;
1144 int32_t t1, t2;
984263bc
MD
1145 caddr_t bpos, dpos, cp2;
1146 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1147 struct nfsmount *nmp;
1148 int error = 0, len, retlen, tsiz, eof, attrflag;
1149 int v3 = NFS_ISV3(vp);
1150
1151#ifndef nolint
1152 eof = 0;
1153#endif
1154 nmp = VFSTONFS(vp->v_mount);
1155 tsiz = uiop->uio_resid;
1156 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1157 return (EFBIG);
1158 while (tsiz > 0) {
1159 nfsstats.rpccnt[NFSPROC_READ]++;
1160 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
1161 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3);
1162 nfsm_fhtom(vp, v3);
1163 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3);
1164 if (v3) {
1165 txdr_hyper(uiop->uio_offset, tl);
1166 *(tl + 2) = txdr_unsigned(len);
1167 } else {
1168 *tl++ = txdr_unsigned(uiop->uio_offset);
1169 *tl++ = txdr_unsigned(len);
1170 *tl = 0;
1171 }
c1cf1e59 1172 nfsm_request(vp, NFSPROC_READ, uiop->uio_td, nfs_vpcred(vp, ND_READ));
984263bc
MD
1173 if (v3) {
1174 nfsm_postop_attr(vp, attrflag);
1175 if (error) {
1176 m_freem(mrep);
1177 goto nfsmout;
1178 }
1179 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1180 eof = fxdr_unsigned(int, *(tl + 1));
1181 } else
1182 nfsm_loadattr(vp, (struct vattr *)0);
1183 nfsm_strsiz(retlen, nmp->nm_rsize);
1184 nfsm_mtouio(uiop, retlen);
1185 m_freem(mrep);
1186 tsiz -= retlen;
1187 if (v3) {
1188 if (eof || retlen == 0) {
1189 tsiz = 0;
1190 }
1191 } else if (retlen < len) {
1192 tsiz = 0;
1193 }
1194 }
1195nfsmout:
1196 return (error);
1197}
1198
1199/*
1200 * nfs write call
1201 */
1202int
e851b29e 1203nfs_writerpc(struct vnode *vp, struct uio *uiop, int *iomode, int *must_commit)
984263bc 1204{
40393ded
RG
1205 u_int32_t *tl;
1206 caddr_t cp;
1207 int32_t t1, t2, backup;
984263bc
MD
1208 caddr_t bpos, dpos, cp2;
1209 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1210 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1211 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
1212 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC;
1213
1214#ifndef DIAGNOSTIC
1215 if (uiop->uio_iovcnt != 1)
1216 panic("nfs: writerpc iovcnt > 1");
1217#endif
1218 *must_commit = 0;
1219 tsiz = uiop->uio_resid;
1220 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1221 return (EFBIG);
1222 while (tsiz > 0) {
1223 nfsstats.rpccnt[NFSPROC_WRITE]++;
1224 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1225 nfsm_reqhead(vp, NFSPROC_WRITE,
1226 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len));
1227 nfsm_fhtom(vp, v3);
1228 if (v3) {
1229 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
1230 txdr_hyper(uiop->uio_offset, tl);
1231 tl += 2;
1232 *tl++ = txdr_unsigned(len);
1233 *tl++ = txdr_unsigned(*iomode);
1234 *tl = txdr_unsigned(len);
1235 } else {
40393ded 1236 u_int32_t x;
984263bc
MD
1237
1238 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1239 /* Set both "begin" and "current" to non-garbage. */
1240 x = txdr_unsigned((u_int32_t)uiop->uio_offset);
1241 *tl++ = x; /* "begin offset" */
1242 *tl++ = x; /* "current offset" */
1243 x = txdr_unsigned(len);
1244 *tl++ = x; /* total to this offset */
1245 *tl = x; /* size of this write */
1246 }
1247 nfsm_uiotom(uiop, len);
c1cf1e59 1248 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_td, nfs_vpcred(vp, ND_WRITE));
984263bc
MD
1249 if (v3) {
1250 wccflag = NFSV3_WCCCHK;
1251 nfsm_wcc_data(vp, wccflag);
1252 if (!error) {
1253 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
1254 + NFSX_V3WRITEVERF);
1255 rlen = fxdr_unsigned(int, *tl++);
1256 if (rlen == 0) {
1257 error = NFSERR_IO;
1258 m_freem(mrep);
1259 break;
1260 } else if (rlen < len) {
1261 backup = len - rlen;
1262 uiop->uio_iov->iov_base -= backup;
1263 uiop->uio_iov->iov_len += backup;
1264 uiop->uio_offset -= backup;
1265 uiop->uio_resid += backup;
1266 len = rlen;
1267 }
1268 commit = fxdr_unsigned(int, *tl++);
1269
1270 /*
1271 * Return the lowest committment level
1272 * obtained by any of the RPCs.
1273 */
1274 if (committed == NFSV3WRITE_FILESYNC)
1275 committed = commit;
1276 else if (committed == NFSV3WRITE_DATASYNC &&
1277 commit == NFSV3WRITE_UNSTABLE)
1278 committed = commit;
1279 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){
1280 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1281 NFSX_V3WRITEVERF);
1282 nmp->nm_state |= NFSSTA_HASWRITEVERF;
1283 } else if (bcmp((caddr_t)tl,
1284 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1285 *must_commit = 1;
1286 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1287 NFSX_V3WRITEVERF);
1288 }
1289 }
1290 } else
1291 nfsm_loadattr(vp, (struct vattr *)0);
1292 if (wccflag)
1293 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec;
1294 m_freem(mrep);
1295 if (error)
1296 break;
1297 tsiz -= len;
1298 }
1299nfsmout:
1300 if (vp->v_mount->mnt_flag & MNT_ASYNC)
1301 committed = NFSV3WRITE_FILESYNC;
1302 *iomode = committed;
1303 if (error)
1304 uiop->uio_resid = tsiz;
1305 return (error);
1306}
1307
1308/*
1309 * nfs mknod rpc
1310 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1311 * mode set to specify the file type and the size field for rdev.
1312 */
1313static int
e851b29e
CP
1314nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1315 struct vattr *vap)
984263bc 1316{
40393ded
RG
1317 struct nfsv2_sattr *sp;
1318 u_int32_t *tl;
1319 caddr_t cp;
1320 int32_t t1, t2;
984263bc
MD
1321 struct vnode *newvp = (struct vnode *)0;
1322 struct nfsnode *np = (struct nfsnode *)0;
1323 struct vattr vattr;
1324 char *cp2;
1325 caddr_t bpos, dpos;
1326 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
1327 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1328 u_int32_t rdev;
1329 int v3 = NFS_ISV3(dvp);
1330
1331 if (vap->va_type == VCHR || vap->va_type == VBLK)
1332 rdev = txdr_unsigned(vap->va_rdev);
1333 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1334 rdev = nfs_xdrneg1;
1335 else {
1336 return (EOPNOTSUPP);
1337 }
3b568787 1338 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) {
984263bc
MD
1339 return (error);
1340 }
1341 nfsstats.rpccnt[NFSPROC_MKNOD]++;
1342 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED +
1343 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1344 nfsm_fhtom(dvp, v3);
1345 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1346 if (v3) {
1347 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1348 *tl++ = vtonfsv3_type(vap->va_type);
1349 nfsm_v3attrbuild(vap, FALSE);
1350 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1351 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1352 *tl++ = txdr_unsigned(umajor(vap->va_rdev));
1353 *tl = txdr_unsigned(uminor(vap->va_rdev));
1354 }
1355 } else {
1356 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1357 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1358 sp->sa_uid = nfs_xdrneg1;
1359 sp->sa_gid = nfs_xdrneg1;
1360 sp->sa_size = rdev;
1361 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1362 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1363 }
dadab5e9 1364 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1365 if (!error) {
1366 nfsm_mtofh(dvp, newvp, v3, gotvp);
1367 if (!gotvp) {
1368 if (newvp) {
1369 vput(newvp);
1370 newvp = (struct vnode *)0;
1371 }
1372 error = nfs_lookitup(dvp, cnp->cn_nameptr,
dadab5e9 1373 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
984263bc
MD
1374 if (!error)
1375 newvp = NFSTOV(np);
1376 }
1377 }
1378 if (v3)
1379 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1380 m_freem(mrep);
1381nfsmout:
984263bc
MD
1382 if (error) {
1383 if (newvp)
1384 vput(newvp);
1385 } else {
2b69e610 1386 if (cnp->cn_flags & CNP_MAKEENTRY)
21739618 1387 cache_enter(dvp, newvp, cnp);
984263bc
MD
1388 *vpp = newvp;
1389 }
1390 VTONFS(dvp)->n_flag |= NMODIFIED;
1391 if (!wccflag)
1392 VTONFS(dvp)->n_attrstamp = 0;
1393 return (error);
1394}
1395
1396/*
1397 * nfs mknod vop
1398 * just call nfs_mknodrpc() to do the work.
e851b29e
CP
1399 *
1400 * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
1401 * struct componentname *a_cnp, struct vattr *a_vap)
984263bc
MD
1402 */
1403/* ARGSUSED */
1404static int
e851b29e 1405nfs_mknod(struct vop_mknod_args *ap)
984263bc
MD
1406{
1407 return nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1408}
1409
1410static u_long create_verf;
1411/*
1412 * nfs file create call
e851b29e
CP
1413 *
1414 * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
1415 * struct componentname *a_cnp, struct vattr *a_vap)
984263bc
MD
1416 */
1417static int
e851b29e 1418nfs_create(struct vop_create_args *ap)
984263bc 1419{
40393ded
RG
1420 struct vnode *dvp = ap->a_dvp;
1421 struct vattr *vap = ap->a_vap;
1422 struct componentname *cnp = ap->a_cnp;
1423 struct nfsv2_sattr *sp;
1424 u_int32_t *tl;
1425 caddr_t cp;
1426 int32_t t1, t2;
984263bc
MD
1427 struct nfsnode *np = (struct nfsnode *)0;
1428 struct vnode *newvp = (struct vnode *)0;
1429 caddr_t bpos, dpos, cp2;
1430 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
1431 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1432 struct vattr vattr;
1433 int v3 = NFS_ISV3(dvp);
1434
1435 /*
1436 * Oops, not for me..
1437 */
1438 if (vap->va_type == VSOCK)
1439 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1440
3b568787 1441 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) {
984263bc
MD
1442 return (error);
1443 }
1444 if (vap->va_vaflags & VA_EXCLUSIVE)
1445 fmode |= O_EXCL;
1446again:
1447 nfsstats.rpccnt[NFSPROC_CREATE]++;
1448 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED +
1449 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1450 nfsm_fhtom(dvp, v3);
1451 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1452 if (v3) {
1453 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1454 if (fmode & O_EXCL) {
1455 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
1456 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF);
1457#ifdef INET
1458 if (!TAILQ_EMPTY(&in_ifaddrhead))
ecd80f47 1459 *tl++ = IA_SIN(TAILQ_FIRST(&in_ifaddrhead))->sin_addr.s_addr;
984263bc
MD
1460 else
1461#endif
1462 *tl++ = create_verf;
1463 *tl = ++create_verf;
1464 } else {
1465 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
1466 nfsm_v3attrbuild(vap, FALSE);
1467 }
1468 } else {
1469 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1470 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1471 sp->sa_uid = nfs_xdrneg1;
1472 sp->sa_gid = nfs_xdrneg1;
1473 sp->sa_size = 0;
1474 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1475 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1476 }
dadab5e9 1477 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1478 if (!error) {
1479 nfsm_mtofh(dvp, newvp, v3, gotvp);
1480 if (!gotvp) {
1481 if (newvp) {
1482 vput(newvp);
1483 newvp = (struct vnode *)0;
1484 }
1485 error = nfs_lookitup(dvp, cnp->cn_nameptr,
dadab5e9 1486 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
984263bc
MD
1487 if (!error)
1488 newvp = NFSTOV(np);
1489 }
1490 }
1491 if (v3)
1492 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1493 m_freem(mrep);
1494nfsmout:
984263bc
MD
1495 if (error) {
1496 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
1497 fmode &= ~O_EXCL;
1498 goto again;
1499 }
1500 if (newvp)
1501 vput(newvp);
1502 } else if (v3 && (fmode & O_EXCL)) {
1503 /*
1504 * We are normally called with only a partially initialized
1505 * VAP. Since the NFSv3 spec says that server may use the
1506 * file attributes to store the verifier, the spec requires
1507 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1508 * in atime, but we can't really assume that all servers will
1509 * so we ensure that our SETATTR sets both atime and mtime.
1510 */
1511 if (vap->va_mtime.tv_sec == VNOVAL)
1512 vfs_timestamp(&vap->va_mtime);
1513 if (vap->va_atime.tv_sec == VNOVAL)
1514 vap->va_atime = vap->va_mtime;
dadab5e9 1515 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td);
984263bc
MD
1516 }
1517 if (!error) {
2b69e610 1518 if (cnp->cn_flags & CNP_MAKEENTRY)
21739618 1519 cache_enter(dvp, newvp, cnp);
c1cf1e59
MD
1520 /*
1521 * The new np may have enough info for access
1522 * checks, make sure rucred and wucred are
1523 * initialized for read and write rpc's.
1524 */
1525 np = VTONFS(newvp);
1526 if (np->n_rucred == NULL)
1527 np->n_rucred = crhold(cnp->cn_cred);
1528 if (np->n_wucred == NULL)
1529 np->n_wucred = crhold(cnp->cn_cred);
984263bc
MD
1530 *ap->a_vpp = newvp;
1531 }
1532 VTONFS(dvp)->n_flag |= NMODIFIED;
1533 if (!wccflag)
1534 VTONFS(dvp)->n_attrstamp = 0;
1535 return (error);
1536}
1537
1538/*
1539 * nfs file remove call
1540 * To try and make nfs semantics closer to ufs semantics, a file that has
1541 * other processes using the vnode is renamed instead of removed and then
1542 * removed later on the last close.
1543 * - If v_usecount > 1
1544 * If a rename is not already in the works
1545 * call nfs_sillyrename() to set it up
1546 * else
1547 * do the remove rpc
e851b29e
CP
1548 *
1549 * nfs_remove(struct vnodeop_desc *a_desc, struct vnode *a_dvp,
1550 * struct vnode *a_vp, struct componentname *a_cnp)
984263bc
MD
1551 */
1552static int
e851b29e 1553nfs_remove(struct vop_remove_args *ap)
984263bc 1554{
40393ded
RG
1555 struct vnode *vp = ap->a_vp;
1556 struct vnode *dvp = ap->a_dvp;
1557 struct componentname *cnp = ap->a_cnp;
1558 struct nfsnode *np = VTONFS(vp);
984263bc
MD
1559 int error = 0;
1560 struct vattr vattr;
1561
1562#ifndef DIAGNOSTIC
2b69e610 1563 if ((cnp->cn_flags & CNP_HASBUF) == 0)
984263bc
MD
1564 panic("nfs_remove: no name");
1565 if (vp->v_usecount < 1)
1566 panic("nfs_remove: bad v_usecount");
1567#endif
1568 if (vp->v_type == VDIR)
1569 error = EPERM;
1570 else if (vp->v_usecount == 1 || (np->n_sillyrename &&
3b568787 1571 VOP_GETATTR(vp, &vattr, cnp->cn_td) == 0 &&
984263bc
MD
1572 vattr.va_nlink > 1)) {
1573 /*
1574 * Purge the name cache so that the chance of a lookup for
1575 * the name succeeding while the remove is in progress is
1576 * minimized. Without node locking it can still happen, such
1577 * that an I/O op returns ESTALE, but since you get this if
1578 * another host removes the file..
1579 */
1580 cache_purge(vp);
1581 /*
1582 * throw away biocache buffers, mainly to avoid
1583 * unnecessary delayed writes later.
1584 */
3b568787 1585 error = nfs_vinvalbuf(vp, 0, cnp->cn_td, 1);
984263bc
MD
1586 /* Do the rpc */
1587 if (error != EINTR)
1588 error = nfs_removerpc(dvp, cnp->cn_nameptr,
dadab5e9 1589 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td);
984263bc
MD
1590 /*
1591 * Kludge City: If the first reply to the remove rpc is lost..
1592 * the reply to the retransmitted request will be ENOENT
1593 * since the file was in fact removed
1594 * Therefore, we cheat and return success.
1595 */
1596 if (error == ENOENT)
1597 error = 0;
1598 } else if (!np->n_sillyrename)
1599 error = nfs_sillyrename(dvp, vp, cnp);
1600 np->n_attrstamp = 0;
1601 return (error);
1602}
1603
1604/*
1605 * nfs file remove rpc called from nfs_inactive
1606 */
1607int
dadab5e9 1608nfs_removeit(struct sillyrename *sp)
984263bc 1609{
dadab5e9
MD
1610 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen,
1611 sp->s_cred, NULL));
984263bc
MD
1612}
1613
1614/*
1615 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1616 */
1617static int
e851b29e
CP
1618nfs_removerpc(struct vnode *dvp, const char *name, int namelen,
1619 struct ucred *cred, struct thread *td)
984263bc 1620{
40393ded
RG
1621 u_int32_t *tl;
1622 caddr_t cp;
1623 int32_t t1, t2;
984263bc
MD
1624 caddr_t bpos, dpos, cp2;
1625 int error = 0, wccflag = NFSV3_WCCRATTR;
1626 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1627 int v3 = NFS_ISV3(dvp);
1628
1629 nfsstats.rpccnt[NFSPROC_REMOVE]++;
1630 nfsm_reqhead(dvp, NFSPROC_REMOVE,
1631 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1632 nfsm_fhtom(dvp, v3);
1633 nfsm_strtom(name, namelen, NFS_MAXNAMLEN);
dadab5e9 1634 nfsm_request(dvp, NFSPROC_REMOVE, td, cred);
984263bc
MD
1635 if (v3)
1636 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1637 m_freem(mrep);
1638nfsmout:
984263bc
MD
1639 VTONFS(dvp)->n_flag |= NMODIFIED;
1640 if (!wccflag)
1641 VTONFS(dvp)->n_attrstamp = 0;
1642 return (error);
1643}
1644
1645/*
1646 * nfs file rename call
e851b29e
CP
1647 *
1648 * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
1649 * struct componentname *a_fcnp, struct vnode *a_tdvp,
1650 * struct vnode *a_tvp, struct componentname *a_tcnp)
984263bc
MD
1651 */
1652static int
e851b29e 1653nfs_rename(struct vop_rename_args *ap)
984263bc 1654{
40393ded
RG
1655 struct vnode *fvp = ap->a_fvp;
1656 struct vnode *tvp = ap->a_tvp;
1657 struct vnode *fdvp = ap->a_fdvp;
1658 struct vnode *tdvp = ap->a_tdvp;
1659 struct componentname *tcnp = ap->a_tcnp;
1660 struct componentname *fcnp = ap->a_fcnp;
984263bc
MD
1661 int error;
1662
1663#ifndef DIAGNOSTIC
2b69e610
MD
1664 if ((tcnp->cn_flags & CNP_HASBUF) == 0 ||
1665 (fcnp->cn_flags & CNP_HASBUF) == 0)
984263bc
MD
1666 panic("nfs_rename: no name");
1667#endif
1668 /* Check for cross-device rename */
1669 if ((fvp->v_mount != tdvp->v_mount) ||
1670 (tvp && (fvp->v_mount != tvp->v_mount))) {
1671 error = EXDEV;
1672 goto out;
1673 }
1674
1675 /*
1676 * We have to flush B_DELWRI data prior to renaming
1677 * the file. If we don't, the delayed-write buffers
1678 * can be flushed out later after the file has gone stale
1679 * under NFSV3. NFSV2 does not have this problem because
1680 * ( as far as I can tell ) it flushes dirty buffers more
1681 * often.
1682 */
1683
3b568787 1684 VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_td);
984263bc 1685 if (tvp)
3b568787 1686 VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_td);
984263bc
MD
1687
1688 /*
1689 * If the tvp exists and is in use, sillyrename it before doing the
1690 * rename of the new file over it.
1691 * XXX Can't sillyrename a directory.
1692 */
1693 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename &&
1694 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1695 vput(tvp);
1696 tvp = NULL;
1697 }
1698
1699 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1700 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
dadab5e9 1701 tcnp->cn_td);
984263bc
MD
1702
1703 if (fvp->v_type == VDIR) {
1704 if (tvp != NULL && tvp->v_type == VDIR)
1705 cache_purge(tdvp);
1706 cache_purge(fdvp);
1707 }
1708
1709out:
1710 if (tdvp == tvp)
1711 vrele(tdvp);
1712 else
1713 vput(tdvp);
1714 if (tvp)
1715 vput(tvp);
1716 vrele(fdvp);
1717 vrele(fvp);
1718 /*
1719 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1720 */
1721 if (error == ENOENT)
1722 error = 0;
1723 return (error);
1724}
1725
1726/*
1727 * nfs file rename rpc called from nfs_remove() above
1728 */
1729static int
e851b29e
CP
1730nfs_renameit(struct vnode *sdvp, struct componentname *scnp,
1731 struct sillyrename *sp)
984263bc
MD
1732{
1733 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
dadab5e9 1734 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td));
984263bc
MD
1735}
1736
1737/*
1738 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1739 */
1740static int
e851b29e
CP
1741nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen,
1742 struct vnode *tdvp, const char *tnameptr, int tnamelen,
1743 struct ucred *cred, struct thread *td)
984263bc 1744{
40393ded
RG
1745 u_int32_t *tl;
1746 caddr_t cp;
1747 int32_t t1, t2;
984263bc
MD
1748 caddr_t bpos, dpos, cp2;
1749 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
1750 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1751 int v3 = NFS_ISV3(fdvp);
1752
1753 nfsstats.rpccnt[NFSPROC_RENAME]++;
1754 nfsm_reqhead(fdvp, NFSPROC_RENAME,
1755 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) +
1756 nfsm_rndup(tnamelen));
1757 nfsm_fhtom(fdvp, v3);
1758 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN);
1759 nfsm_fhtom(tdvp, v3);
1760 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN);
dadab5e9 1761 nfsm_request(fdvp, NFSPROC_RENAME, td, cred);
984263bc
MD
1762 if (v3) {
1763 nfsm_wcc_data(fdvp, fwccflag);
1764 nfsm_wcc_data(tdvp, twccflag);
1765 }
6b08710e
MD
1766 m_freem(mrep);
1767nfsmout:
984263bc
MD
1768 VTONFS(fdvp)->n_flag |= NMODIFIED;
1769 VTONFS(tdvp)->n_flag |= NMODIFIED;
1770 if (!fwccflag)
1771 VTONFS(fdvp)->n_attrstamp = 0;
1772 if (!twccflag)
1773 VTONFS(tdvp)->n_attrstamp = 0;
1774 return (error);
1775}
1776
1777/*
1778 * nfs hard link create call
e851b29e
CP
1779 *
1780 * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp,
1781 * struct componentname *a_cnp)
984263bc
MD
1782 */
1783static int
e851b29e 1784nfs_link(struct vop_link_args *ap)
984263bc 1785{
40393ded
RG
1786 struct vnode *vp = ap->a_vp;
1787 struct vnode *tdvp = ap->a_tdvp;
1788 struct componentname *cnp = ap->a_cnp;
1789 u_int32_t *tl;
1790 caddr_t cp;
1791 int32_t t1, t2;
984263bc
MD
1792 caddr_t bpos, dpos, cp2;
1793 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
1794 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1795 int v3;
1796
1797 if (vp->v_mount != tdvp->v_mount) {
1798 return (EXDEV);
1799 }
1800
1801 /*
1802 * Push all writes to the server, so that the attribute cache
1803 * doesn't get "out of sync" with the server.
1804 * XXX There should be a better way!
1805 */
3b568787 1806 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_td);
984263bc
MD
1807
1808 v3 = NFS_ISV3(vp);
1809 nfsstats.rpccnt[NFSPROC_LINK]++;
1810 nfsm_reqhead(vp, NFSPROC_LINK,
1811 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
1812 nfsm_fhtom(vp, v3);
1813 nfsm_fhtom(tdvp, v3);
1814 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
dadab5e9 1815 nfsm_request(vp, NFSPROC_LINK, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1816 if (v3) {
1817 nfsm_postop_attr(vp, attrflag);
1818 nfsm_wcc_data(tdvp, wccflag);
1819 }
6b08710e
MD
1820 m_freem(mrep);
1821nfsmout:
984263bc
MD
1822 VTONFS(tdvp)->n_flag |= NMODIFIED;
1823 if (!attrflag)
1824 VTONFS(vp)->n_attrstamp = 0;
1825 if (!wccflag)
1826 VTONFS(tdvp)->n_attrstamp = 0;
1827 /*
1828 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1829 */
1830 if (error == EEXIST)
1831 error = 0;
1832 return (error);
1833}
1834
1835/*
1836 * nfs symbolic link create call
e851b29e
CP
1837 *
1838 * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1839 * struct componentname *a_cnp, struct vattr *a_vap,
1840 * char *a_target)
984263bc
MD
1841 */
1842static int
e851b29e 1843nfs_symlink(struct vop_symlink_args *ap)
984263bc 1844{
40393ded
RG
1845 struct vnode *dvp = ap->a_dvp;
1846 struct vattr *vap = ap->a_vap;
1847 struct componentname *cnp = ap->a_cnp;
1848 struct nfsv2_sattr *sp;
1849 u_int32_t *tl;
1850 caddr_t cp;
1851 int32_t t1, t2;
984263bc
MD
1852 caddr_t bpos, dpos, cp2;
1853 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
1854 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1855 struct vnode *newvp = (struct vnode *)0;
1856 int v3 = NFS_ISV3(dvp);
1857
1858 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1859 slen = strlen(ap->a_target);
1860 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED +
1861 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3));
1862 nfsm_fhtom(dvp, v3);
1863 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1864 if (v3) {
1865 nfsm_v3attrbuild(vap, FALSE);
1866 }
1867 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
1868 if (!v3) {
1869 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1870 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
1871 sp->sa_uid = nfs_xdrneg1;
1872 sp->sa_gid = nfs_xdrneg1;
1873 sp->sa_size = nfs_xdrneg1;
1874 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1875 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1876 }
1877
1878 /*
1879 * Issue the NFS request and get the rpc response.
1880 *
1881 * Only NFSv3 responses returning an error of 0 actually return
1882 * a file handle that can be converted into newvp without having
1883 * to do an extra lookup rpc.
1884 */
dadab5e9 1885 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1886 if (v3) {
1887 if (error == 0)
1888 nfsm_mtofh(dvp, newvp, v3, gotvp);
1889 nfsm_wcc_data(dvp, wccflag);
1890 }
1891
1892 /*
1893 * out code jumps -> here, mrep is also freed.
1894 */
1895
6b08710e
MD
1896 m_freem(mrep);
1897nfsmout:
984263bc
MD
1898
1899 /*
1900 * If we get an EEXIST error, silently convert it to no-error
1901 * in case of an NFS retry.
1902 */
1903 if (error == EEXIST)
1904 error = 0;
1905
1906 /*
1907 * If we do not have (or no longer have) an error, and we could
1908 * not extract the newvp from the response due to the request being
1909 * NFSv2 or the error being EEXIST. We have to do a lookup in order
1910 * to obtain a newvp to return.
1911 */
1912 if (error == 0 && newvp == NULL) {
1913 struct nfsnode *np = NULL;
1914
1915 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
dadab5e9 1916 cnp->cn_cred, cnp->cn_td, &np);
984263bc
MD
1917 if (!error)
1918 newvp = NFSTOV(np);
1919 }
1920 if (error) {
1921 if (newvp)
1922 vput(newvp);
1923 } else {
1924 *ap->a_vpp = newvp;
1925 }
1926 VTONFS(dvp)->n_flag |= NMODIFIED;
1927 if (!wccflag)
1928 VTONFS(dvp)->n_attrstamp = 0;
1929 return (error);
1930}
1931
1932/*
1933 * nfs make dir call
e851b29e
CP
1934 *
1935 * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
1936 * struct componentname *a_cnp, struct vattr *a_vap)
984263bc
MD
1937 */
1938static int
e851b29e 1939nfs_mkdir(struct vop_mkdir_args *ap)
984263bc 1940{
40393ded
RG
1941 struct vnode *dvp = ap->a_dvp;
1942 struct vattr *vap = ap->a_vap;
1943 struct componentname *cnp = ap->a_cnp;
1944 struct nfsv2_sattr *sp;
1945 u_int32_t *tl;
1946 caddr_t cp;
1947 int32_t t1, t2;
1948 int len;
984263bc
MD
1949 struct nfsnode *np = (struct nfsnode *)0;
1950 struct vnode *newvp = (struct vnode *)0;
1951 caddr_t bpos, dpos, cp2;
1952 int error = 0, wccflag = NFSV3_WCCRATTR;
1953 int gotvp = 0;
1954 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1955 struct vattr vattr;
1956 int v3 = NFS_ISV3(dvp);
1957
3b568787 1958 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) {
984263bc
MD
1959 return (error);
1960 }
1961 len = cnp->cn_namelen;
1962 nfsstats.rpccnt[NFSPROC_MKDIR]++;
1963 nfsm_reqhead(dvp, NFSPROC_MKDIR,
1964 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3));
1965 nfsm_fhtom(dvp, v3);
1966 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
1967 if (v3) {
1968 nfsm_v3attrbuild(vap, FALSE);
1969 } else {
1970 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1971 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
1972 sp->sa_uid = nfs_xdrneg1;
1973 sp->sa_gid = nfs_xdrneg1;
1974 sp->sa_size = nfs_xdrneg1;
1975 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1976 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1977 }
dadab5e9 1978 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1979 if (!error)
1980 nfsm_mtofh(dvp, newvp, v3, gotvp);
1981 if (v3)
1982 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1983 m_freem(mrep);
1984nfsmout:
984263bc
MD
1985 VTONFS(dvp)->n_flag |= NMODIFIED;
1986 if (!wccflag)
1987 VTONFS(dvp)->n_attrstamp = 0;
1988 /*
1989 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
1990 * if we can succeed in looking up the directory.
1991 */
1992 if (error == EEXIST || (!error && !gotvp)) {
1993 if (newvp) {
1994 vrele(newvp);
1995 newvp = (struct vnode *)0;
1996 }
1997 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
dadab5e9 1998 cnp->cn_td, &np);
984263bc
MD
1999 if (!error) {
2000 newvp = NFSTOV(np);
2001 if (newvp->v_type != VDIR)
2002 error = EEXIST;
2003 }
2004 }
2005 if (error) {
2006 if (newvp)
2007 vrele(newvp);
2008 } else
2009 *ap->a_vpp = newvp;
2010 return (error);
2011}
2012
2013/*
2014 * nfs remove directory call
e851b29e
CP
2015 *
2016 * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
2017 * struct componentname *a_cnp)
984263bc
MD
2018 */
2019static int
e851b29e 2020nfs_rmdir(struct vop_rmdir_args *ap)
984263bc 2021{
40393ded
RG
2022 struct vnode *vp = ap->a_vp;
2023 struct vnode *dvp = ap->a_dvp;
2024 struct componentname *cnp = ap->a_cnp;
2025 u_int32_t *tl;
2026 caddr_t cp;
2027 int32_t t1, t2;
984263bc
MD
2028 caddr_t bpos, dpos, cp2;
2029 int error = 0, wccflag = NFSV3_WCCRATTR;
2030 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2031 int v3 = NFS_ISV3(dvp);
2032
2033 if (dvp == vp)
2034 return (EINVAL);
2035 nfsstats.rpccnt[NFSPROC_RMDIR]++;
2036 nfsm_reqhead(dvp, NFSPROC_RMDIR,
2037 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
2038 nfsm_fhtom(dvp, v3);
2039 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
dadab5e9 2040 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_td, cnp->cn_cred);
984263bc
MD
2041 if (v3)
2042 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
2043 m_freem(mrep);
2044nfsmout:
984263bc
MD
2045 VTONFS(dvp)->n_flag |= NMODIFIED;
2046 if (!wccflag)
2047 VTONFS(dvp)->n_attrstamp = 0;
2048 cache_purge(dvp);
2049 cache_purge(vp);
2050 /*
2051 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2052 */
2053 if (error == ENOENT)
2054 error = 0;
2055 return (error);
2056}
2057
2058/*
2059 * nfs readdir call
e851b29e
CP
2060 *
2061 * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
984263bc
MD
2062 */
2063static int
e851b29e 2064nfs_readdir(struct vop_readdir_args *ap)
984263bc 2065{
40393ded
RG
2066 struct vnode *vp = ap->a_vp;
2067 struct nfsnode *np = VTONFS(vp);
2068 struct uio *uio = ap->a_uio;
984263bc
MD
2069 int tresid, error;
2070 struct vattr vattr;
2071
2072 if (vp->v_type != VDIR)
2073 return (EPERM);
2074 /*
2075 * First, check for hit on the EOF offset cache
2076 */
2077 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2078 (np->n_flag & NMODIFIED) == 0) {
2079 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) {
2080 if (NQNFS_CKCACHABLE(vp, ND_READ)) {
2081 nfsstats.direofcache_hits++;
2082 return (0);
2083 }
3b568787 2084 } else if (VOP_GETATTR(vp, &vattr, uio->uio_td) == 0 &&
984263bc
MD
2085 np->n_mtime == vattr.va_mtime.tv_sec) {
2086 nfsstats.direofcache_hits++;
2087 return (0);
2088 }
2089 }
2090
2091 /*
2092 * Call nfs_bioread() to do the real work.
2093 */
2094 tresid = uio->uio_resid;
3b568787 2095 error = nfs_bioread(vp, uio, 0);
984263bc
MD
2096
2097 if (!error && uio->uio_resid == tresid)
2098 nfsstats.direofcache_misses++;
2099 return (error);
2100}
2101
2102/*
2103 * Readdir rpc call.
2104 * Called from below the buffer cache by nfs_doio().
2105 */
2106int
3b568787 2107nfs_readdirrpc(struct vnode *vp, struct uio *uiop)
984263bc 2108{
40393ded
RG
2109 int len, left;
2110 struct dirent *dp = NULL;
2111 u_int32_t *tl;
2112 caddr_t cp;
2113 int32_t t1, t2;
2114 nfsuint64 *cookiep;
984263bc
MD
2115 caddr_t bpos, dpos, cp2;
2116 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2117 nfsuint64 cookie;
2118 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2119 struct nfsnode *dnp = VTONFS(vp);
2120 u_quad_t fileno;
2121 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2122 int attrflag;
2123 int v3 = NFS_ISV3(vp);
2124
2125#ifndef DIAGNOSTIC
2126 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2127 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2128 panic("nfs readdirrpc bad uio");
2129#endif
2130
2131 /*
2132 * If there is no cookie, assume directory was stale.
2133 */
2134 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2135 if (cookiep)
2136 cookie = *cookiep;
2137 else
2138 return (NFSERR_BAD_COOKIE);
2139 /*
2140 * Loop around doing readdir rpc's of size nm_readdirsize
2141 * truncated to a multiple of DIRBLKSIZ.
2142 * The stopping criteria is EOF or buffer full.
2143 */
2144 while (more_dirs && bigenough) {
2145 nfsstats.rpccnt[NFSPROC_READDIR]++;
2146 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) +
2147 NFSX_READDIR(v3));
2148 nfsm_fhtom(vp, v3);
2149 if (v3) {
2150 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
2151 *tl++ = cookie.nfsuquad[0];
2152 *tl++ = cookie.nfsuquad[1];
2153 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2154 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2155 } else {
2156 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2157 *tl++ = cookie.nfsuquad[0];
2158 }
2159 *tl = txdr_unsigned(nmp->nm_readdirsize);
c1cf1e59 2160 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_td, nfs_vpcred(vp, ND_READ));
984263bc
MD
2161 if (v3) {
2162 nfsm_postop_attr(vp, attrflag);
2163 if (!error) {
2164 nfsm_dissect(tl, u_int32_t *,
2165 2 * NFSX_UNSIGNED);
2166 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2167 dnp->n_cookieverf.nfsuquad[1] = *tl;
2168 } else {
2169 m_freem(mrep);
2170 goto nfsmout;
2171 }
2172 }
2173 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2174 more_dirs = fxdr_unsigned(int, *tl);
2175
2176 /* loop thru the dir entries, doctoring them to 4bsd form */
2177 while (more_dirs && bigenough) {
2178 if (v3) {
2179 nfsm_dissect(tl, u_int32_t *,
2180 3 * NFSX_UNSIGNED);
2181 fileno = fxdr_hyper(tl);
2182 len = fxdr_unsigned(int, *(tl + 2));
2183 } else {
2184 nfsm_dissect(tl, u_int32_t *,
2185 2 * NFSX_UNSIGNED);
2186 fileno = fxdr_unsigned(u_quad_t, *tl++);
2187 len = fxdr_unsigned(int, *tl);
2188 }
2189 if (len <= 0 || len > NFS_MAXNAMLEN) {
2190 error = EBADRPC;
2191 m_freem(mrep);
2192 goto nfsmout;
2193 }
2194 tlen = nfsm_rndup(len);
2195 if (tlen == len)
2196 tlen += 4; /* To ensure null termination */
2197 left = DIRBLKSIZ - blksiz;
2198 if ((tlen + DIRHDSIZ) > left) {
2199 dp->d_reclen += left;
2200 uiop->uio_iov->iov_base += left;
2201 uiop->uio_iov->iov_len -= left;
2202 uiop->uio_offset += left;
2203 uiop->uio_resid -= left;
2204 blksiz = 0;
2205 }
2206 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2207 bigenough = 0;
2208 if (bigenough) {
2209 dp = (struct dirent *)uiop->uio_iov->iov_base;
2210 dp->d_fileno = (int)fileno;
2211 dp->d_namlen = len;
2212 dp->d_reclen = tlen + DIRHDSIZ;
2213 dp->d_type = DT_UNKNOWN;
2214 blksiz += dp->d_reclen;
2215 if (blksiz == DIRBLKSIZ)
2216 blksiz = 0;
2217 uiop->uio_offset += DIRHDSIZ;
2218 uiop->uio_resid -= DIRHDSIZ;
2219 uiop->uio_iov->iov_base += DIRHDSIZ;
2220 uiop->uio_iov->iov_len -= DIRHDSIZ;
2221 nfsm_mtouio(uiop, len);
2222 cp = uiop->uio_iov->iov_base;
2223 tlen -= len;
2224 *cp = '\0'; /* null terminate */
2225 uiop->uio_iov->iov_base += tlen;
2226 uiop->uio_iov->iov_len -= tlen;
2227 uiop->uio_offset += tlen;
2228 uiop->uio_resid -= tlen;
2229 } else
2230 nfsm_adv(nfsm_rndup(len));
2231 if (v3) {
2232 nfsm_dissect(tl, u_int32_t *,
2233 3 * NFSX_UNSIGNED);
2234 } else {
2235 nfsm_dissect(tl, u_int32_t *,
2236 2 * NFSX_UNSIGNED);
2237 }
2238 if (bigenough) {
2239 cookie.nfsuquad[0] = *tl++;
2240 if (v3)
2241 cookie.nfsuquad[1] = *tl++;
2242 } else if (v3)
2243 tl += 2;
2244 else
2245 tl++;
2246 more_dirs = fxdr_unsigned(int, *tl);
2247 }
2248 /*
2249 * If at end of rpc data, get the eof boolean
2250 */
2251 if (!more_dirs) {
2252 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2253 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2254 }
2255 m_freem(mrep);
2256 }
2257 /*
2258 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2259 * by increasing d_reclen for the last record.
2260 */
2261 if (blksiz > 0) {
2262 left = DIRBLKSIZ - blksiz;
2263 dp->d_reclen += left;
2264 uiop->uio_iov->iov_base += left;
2265 uiop->uio_iov->iov_len -= left;
2266 uiop->uio_offset += left;
2267 uiop->uio_resid -= left;
2268 }
2269
2270 /*
2271 * We are now either at the end of the directory or have filled the
2272 * block.
2273 */
2274 if (bigenough)
2275 dnp->n_direofoffset = uiop->uio_offset;
2276 else {
2277 if (uiop->uio_resid > 0)
2278 printf("EEK! readdirrpc resid > 0\n");
2279 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2280 *cookiep = cookie;
2281 }
2282nfsmout:
2283 return (error);
2284}
2285
2286/*
2287 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2288 */
2289int
3b568787 2290nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop)
984263bc 2291{
40393ded
RG
2292 int len, left;
2293 struct dirent *dp;
2294 u_int32_t *tl;
2295 caddr_t cp;
2296 int32_t t1, t2;
2297 struct vnode *newvp;
2298 nfsuint64 *cookiep;
984263bc
MD
2299 caddr_t bpos, dpos, cp2, dpossav1, dpossav2;
2300 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2;
2301 struct nameidata nami, *ndp = &nami;
2302 struct componentname *cnp = &ndp->ni_cnd;
2303 nfsuint64 cookie;
2304 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2305 struct nfsnode *dnp = VTONFS(vp), *np;
2306 nfsfh_t *fhp;
2307 u_quad_t fileno;
2308 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2309 int attrflag, fhsize;
2310
2311#ifndef nolint
2312 dp = (struct dirent *)0;
2313#endif
2314#ifndef DIAGNOSTIC
2315 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2316 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2317 panic("nfs readdirplusrpc bad uio");
2318#endif
2319 ndp->ni_dvp = vp;
2320 newvp = NULLVP;
2321
2322 /*
2323 * If there is no cookie, assume directory was stale.
2324 */
2325 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2326 if (cookiep)
2327 cookie = *cookiep;
2328 else
2329 return (NFSERR_BAD_COOKIE);
2330 /*
2331 * Loop around doing readdir rpc's of size nm_readdirsize
2332 * truncated to a multiple of DIRBLKSIZ.
2333 * The stopping criteria is EOF or buffer full.
2334 */
2335 while (more_dirs && bigenough) {
2336 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
2337 nfsm_reqhead(vp, NFSPROC_READDIRPLUS,
2338 NFSX_FH(1) + 6 * NFSX_UNSIGNED);
2339 nfsm_fhtom(vp, 1);
2340 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
2341 *tl++ = cookie.nfsuquad[0];
2342 *tl++ = cookie.nfsuquad[1];
2343 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2344 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2345 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2346 *tl = txdr_unsigned(nmp->nm_rsize);
c1cf1e59 2347 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_td, nfs_vpcred(vp, ND_READ));
984263bc
MD
2348 nfsm_postop_attr(vp, attrflag);
2349 if (error) {
2350 m_freem(mrep);
2351 goto nfsmout;
2352 }
2353 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2354 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2355 dnp->n_cookieverf.nfsuquad[1] = *tl++;
2356 more_dirs = fxdr_unsigned(int, *tl);
2357
2358 /* loop thru the dir entries, doctoring them to 4bsd form */
2359 while (more_dirs && bigenough) {
2360 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2361 fileno = fxdr_hyper(tl);
2362 len = fxdr_unsigned(int, *(tl + 2));
2363 if (len <= 0 || len > NFS_MAXNAMLEN) {
2364 error = EBADRPC;
2365 m_freem(mrep);
2366 goto nfsmout;
2367 }
2368 tlen = nfsm_rndup(len);
2369 if (tlen == len)
2370 tlen += 4; /* To ensure null termination*/
2371 left = DIRBLKSIZ - blksiz;
2372 if ((tlen + DIRHDSIZ) > left) {
2373 dp->d_reclen += left;
2374 uiop->uio_iov->iov_base += left;
2375 uiop->uio_iov->iov_len -= left;
2376 uiop->uio_offset += left;
2377 uiop->uio_resid -= left;
2378 blksiz = 0;
2379 }
2380 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2381 bigenough = 0;
2382 if (bigenough) {
2383 dp = (struct dirent *)uiop->uio_iov->iov_base;
2384 dp->d_fileno = (int)fileno;
2385 dp->d_namlen = len;
2386 dp->d_reclen = tlen + DIRHDSIZ;
2387 dp->d_type = DT_UNKNOWN;
2388 blksiz += dp->d_reclen;
2389 if (blksiz == DIRBLKSIZ)
2390 blksiz = 0;
2391 uiop->uio_offset += DIRHDSIZ;
2392 uiop->uio_resid -= DIRHDSIZ;
2393 uiop->uio_iov->iov_base += DIRHDSIZ;
2394 uiop->uio_iov->iov_len -= DIRHDSIZ;
2395 cnp->cn_nameptr = uiop->uio_iov->iov_base;
2396 cnp->cn_namelen = len;
2397 nfsm_mtouio(uiop, len);
2398 cp = uiop->uio_iov->iov_base;
2399 tlen -= len;
2400 *cp = '\0';
2401 uiop->uio_iov->iov_base += tlen;
2402 uiop->uio_iov->iov_len -= tlen;
2403 uiop->uio_offset += tlen;
2404 uiop->uio_resid -= tlen;
2405 } else
2406 nfsm_adv(nfsm_rndup(len));
2407 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2408 if (bigenough) {
2409 cookie.nfsuquad[0] = *tl++;
2410 cookie.nfsuquad[1] = *tl++;
2411 } else
2412 tl += 2;
2413
2414 /*
2415 * Since the attributes are before the file handle
2416 * (sigh), we must skip over the attributes and then
2417 * come back and get them.
2418 */
2419 attrflag = fxdr_unsigned(int, *tl);
2420 if (attrflag) {
2421 dpossav1 = dpos;
2422 mdsav1 = md;
2423 nfsm_adv(NFSX_V3FATTR);
2424 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2425 doit = fxdr_unsigned(int, *tl);
2426 if (doit) {
2427 nfsm_getfh(fhp, fhsize, 1);
2428 if (NFS_CMPFH(dnp, fhp, fhsize)) {
597aea93 2429 vref(vp);
984263bc
MD
2430 newvp = vp;
2431 np = dnp;
2432 } else {
2433 error = nfs_nget(vp->v_mount, fhp,
2434 fhsize, &np);
2435 if (error)
2436 doit = 0;
2437 else
2438 newvp = NFSTOV(np);
2439 }
2440 }
2441 if (doit && bigenough) {
2442 dpossav2 = dpos;
2443 dpos = dpossav1;
2444 mdsav2 = md;
2445 md = mdsav1;
2446 nfsm_loadattr(newvp, (struct vattr *)0);
2447 dpos = dpossav2;
2448 md = mdsav2;
2449 dp->d_type =
2450 IFTODT(VTTOIF(np->n_vattr.va_type));
2451 ndp->ni_vp = newvp;
21739618 2452 cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp);
984263bc
MD
2453 }
2454 } else {
2455 /* Just skip over the file handle */
2456 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2457 i = fxdr_unsigned(int, *tl);
2458 nfsm_adv(nfsm_rndup(i));
2459 }
2460 if (newvp != NULLVP) {
2461 if (newvp == vp)
2462 vrele(newvp);
2463 else
2464 vput(newvp);
2465 newvp = NULLVP;
2466 }
2467 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2468 more_dirs = fxdr_unsigned(int, *tl);
2469 }
2470 /*
2471 * If at end of rpc data, get the eof boolean
2472 */
2473 if (!more_dirs) {
2474 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2475 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2476 }
2477 m_freem(mrep);
2478 }
2479 /*
2480 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2481 * by increasing d_reclen for the last record.
2482 */
2483 if (blksiz > 0) {
2484 left = DIRBLKSIZ - blksiz;
2485 dp->d_reclen += left;
2486 uiop->uio_iov->iov_base += left;
2487 uiop->uio_iov->iov_len -= left;
2488 uiop->uio_offset += left;
2489 uiop->uio_resid -= left;
2490 }
2491
2492 /*
2493 * We are now either at the end of the directory or have filled the
2494 * block.
2495 */
2496 if (bigenough)
2497 dnp->n_direofoffset = uiop->uio_offset;
2498 else {
2499 if (uiop->uio_resid > 0)
2500 printf("EEK! readdirplusrpc resid > 0\n");
2501 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2502 *cookiep = cookie;
2503 }
2504nfsmout:
2505 if (newvp != NULLVP) {
2506 if (newvp == vp)
2507 vrele(newvp);
2508 else
2509 vput(newvp);
2510 newvp = NULLVP;
2511 }
2512 return (error);
2513}
2514
2515/*
2516 * Silly rename. To make the NFS filesystem that is stateless look a little
2517 * more like the "ufs" a remove of an active vnode is translated to a rename
2518 * to a funny looking filename that is removed by nfs_inactive on the
2519 * nfsnode. There is the potential for another process on a different client
2520 * to create the same funny name between the nfs_lookitup() fails and the
2521 * nfs_rename() completes, but...
2522 */
2523static int
e851b29e 2524nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
984263bc 2525{
40393ded 2526 struct sillyrename *sp;
984263bc
MD
2527 struct nfsnode *np;
2528 int error;
984263bc
MD
2529
2530 cache_purge(dvp);
2531 np = VTONFS(vp);
2532#ifndef DIAGNOSTIC
2533 if (vp->v_type == VDIR)
2534 panic("nfs: sillyrename dir");
2535#endif
2536 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2537 M_NFSREQ, M_WAITOK);
2538 sp->s_cred = crdup(cnp->cn_cred);
2539 sp->s_dvp = dvp;
597aea93 2540 vref(dvp);
984263bc
MD
2541
2542 /* Fudge together a funny name */
dadab5e9 2543 sp->s_namlen = sprintf(sp->s_name, ".nfsA%08x4.4", (int)cnp->cn_td);
984263bc
MD
2544
2545 /* Try lookitups until we get one that isn't there */
2546 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
dadab5e9 2547 cnp->cn_td, (struct nfsnode **)0) == 0) {
984263bc
MD
2548 sp->s_name[4]++;
2549 if (sp->s_name[4] > 'z') {
2550 error = EINVAL;
2551 goto bad;
2552 }
2553 }
2554 error = nfs_renameit(dvp, cnp, sp);
2555 if (error)
2556 goto bad;
2557 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
dadab5e9 2558 cnp->cn_td, &np);
984263bc
MD
2559 np->n_sillyrename = sp;
2560 return (0);
2561bad:
2562 vrele(sp->s_dvp);
2563 crfree(sp->s_cred);
2564 free((caddr_t)sp, M_NFSREQ);
2565 return (error);
2566}
2567
2568/*
2569 * Look up a file name and optionally either update the file handle or
2570 * allocate an nfsnode, depending on the value of npp.
2571 * npp == NULL --> just do the lookup
2572 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2573 * handled too
2574 * *npp != NULL --> update the file handle in the vnode
2575 */
2576static int
e851b29e
CP
2577nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred,
2578 struct thread *td, struct nfsnode **npp)
984263bc 2579{
40393ded
RG
2580 u_int32_t *tl;
2581 caddr_t cp;
2582 int32_t t1, t2;
984263bc
MD
2583 struct vnode *newvp = (struct vnode *)0;
2584 struct nfsnode *np, *dnp = VTONFS(dvp);
2585 caddr_t bpos, dpos, cp2;
2586 int error = 0, fhlen, attrflag;
2587 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2588 nfsfh_t *nfhp;
2589 int v3 = NFS_ISV3(dvp);
2590
2591 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
2592 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
2593 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2594 nfsm_fhtom(dvp, v3);
2595 nfsm_strtom(name, len, NFS_MAXNAMLEN);
dadab5e9 2596 nfsm_request(dvp, NFSPROC_LOOKUP, td, cred);
984263bc
MD
2597 if (npp && !error) {
2598 nfsm_getfh(nfhp, fhlen, v3);
2599 if (*npp) {
2600 np = *npp;
2601 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2602 free((caddr_t)np->n_fhp, M_NFSBIGFH);
2603 np->n_fhp = &np->n_fh;
2604 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2605 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK);
2606 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2607 np->n_fhsize = fhlen;
2608 newvp = NFSTOV(np);
2609 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
597aea93 2610 vref(dvp);
984263bc
MD
2611 newvp = dvp;
2612 } else {
2613 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
2614 if (error) {
2615 m_freem(mrep);
2616 return (error);
2617 }
2618 newvp = NFSTOV(np);
2619 }
2620 if (v3) {
2621 nfsm_postop_attr(newvp, attrflag);
2622 if (!attrflag && *npp == NULL) {
2623 m_freem(mrep);
2624 if (newvp == dvp)
2625 vrele(newvp);
2626 else
2627 vput(newvp);
2628 return (ENOENT);
2629 }
2630 } else
2631 nfsm_loadattr(newvp, (struct vattr *)0);
2632 }
6b08710e
MD
2633 m_freem(mrep);
2634nfsmout:
984263bc
MD
2635 if (npp && *npp == NULL) {
2636 if (error) {
2637 if (newvp) {
2638 if (newvp == dvp)
2639 vrele(newvp);
2640 else
2641 vput(newvp);
2642 }
2643 } else
2644 *npp = np;
2645 }
2646 return (error);
2647}
2648
2649/*
2650 * Nfs Version 3 commit rpc
2651 */
2652int
3b568787 2653nfs_commit(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td)
984263bc 2654{
40393ded
RG
2655 caddr_t cp;
2656 u_int32_t *tl;
2657 int32_t t1, t2;
2658 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
984263bc
MD
2659 caddr_t bpos, dpos, cp2;
2660 int error = 0, wccflag = NFSV3_WCCRATTR;
2661 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2662
2663 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
2664 return (0);
2665 nfsstats.rpccnt[NFSPROC_COMMIT]++;
2666 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1));
2667 nfsm_fhtom(vp, 1);
2668 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2669 txdr_hyper(offset, tl);
2670 tl += 2;
2671 *tl = txdr_unsigned(cnt);
c1cf1e59 2672 nfsm_request(vp, NFSPROC_COMMIT, td, nfs_vpcred(vp, ND_WRITE));
984263bc
MD
2673 nfsm_wcc_data(vp, wccflag);
2674 if (!error) {
2675 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF);
2676 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
2677 NFSX_V3WRITEVERF)) {
2678 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
2679 NFSX_V3WRITEVERF);
2680 error = NFSERR_STALEWRITEVERF;
2681 }
2682 }
6b08710e
MD
2683 m_freem(mrep);
2684nfsmout:
984263bc
MD
2685 return (error);
2686}
2687
2688/*
2689 * Kludge City..
2690 * - make nfs_bmap() essentially a no-op that does no translation
2691 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
2692 * (Maybe I could use the process's page mapping, but I was concerned that
2693 * Kernel Write might not be enabled and also figured copyout() would do
2694 * a lot more work than bcopy() and also it currently happens in the
2695 * context of the swapper process (2).
e851b29e
CP
2696 *
2697 * nfs_bmap(struct vnode *a_vp, daddr_t a_bn, struct vnode **a_vpp,
2698 * daddr_t *a_bnp, int *a_runp, int *a_runb)
984263bc
MD
2699 */
2700static int
e851b29e 2701nfs_bmap(struct vop_bmap_args *ap)
984263bc 2702{
40393ded 2703 struct vnode *vp = ap->a_vp;
984263bc
MD
2704
2705 if (ap->a_vpp != NULL)
2706 *ap->a_vpp = vp;
2707 if (ap->a_bnp != NULL)
2708 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize);
2709 if (ap->a_runp != NULL)
2710 *ap->a_runp = 0;
2711 if (ap->a_runb != NULL)
2712 *ap->a_runb = 0;
2713 return (0);
2714}
2715
2716/*
2717 * Strategy routine.
2718 * For async requests when nfsiod(s) are running, queue the request by
2719 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the
2720 * request.
2721 */
2722static int
e851b29e 2723nfs_strategy(struct vop_strategy_args *ap)
984263bc 2724{
40393ded 2725 struct buf *bp = ap->a_bp;
dadab5e9 2726 struct thread *td;
984263bc
MD
2727 int error = 0;
2728
2729 KASSERT(!(bp->b_flags & B_DONE), ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2730 KASSERT(BUF_REFCNT(bp) > 0, ("nfs_strategy: buffer %p not locked", bp));
2731
2732 if (bp->b_flags & B_PHYS)
2733 panic("nfs physio");
2734
2735 if (bp->b_flags & B_ASYNC)
dadab5e9 2736 td = NULL;
984263bc 2737 else
dadab5e9 2738 td = curthread; /* XXX */
984263bc 2739
984263bc
MD
2740 /*
2741 * If the op is asynchronous and an i/o daemon is waiting
2742 * queue the request, wake it up and wait for completion
2743 * otherwise just do it ourselves.
2744 */
2745 if ((bp->b_flags & B_ASYNC) == 0 ||
3b568787
MD
2746 nfs_asyncio(bp, td))
2747 error = nfs_doio(bp, td);
984263bc
MD
2748 return (error);
2749}
2750
2751/*
2752 * Mmap a file
2753 *
2754 * NB Currently unsupported.
e851b29e
CP
2755 *
2756 * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred,
2757 * struct thread *a_td)
984263bc
MD
2758 */
2759/* ARGSUSED */
2760static int
e851b29e 2761nfs_mmap(struct vop_mmap_args *ap)
984263bc 2762{
984263bc
MD
2763 return (EINVAL);
2764}
2765
2766/*
2767 * fsync vnode op. Just call nfs_flush() with commit == 1.
e851b29e
CP
2768 *
2769 * nfs_fsync(struct vnodeop_desc *a_desc, struct vnode *a_vp,
2770 * struct ucred * a_cred, int a_waitfor, struct thread *a_td)
984263bc
MD
2771 */
2772/* ARGSUSED */
2773static int
e851b29e 2774nfs_fsync(struct vop_fsync_args *ap)
984263bc 2775{
3b568787 2776 return (nfs_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1));
984263bc
MD
2777}
2778
2779/*
2780 * Flush all the blocks associated with a vnode.
2781 * Walk through the buffer pool and push any dirty pages
2782 * associated with the vnode.
2783 */
2784static int
e851b29e 2785nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit)
984263bc 2786{
40393ded
RG
2787 struct nfsnode *np = VTONFS(vp);
2788 struct buf *bp;
2789 int i;
984263bc
MD
2790 struct buf *nbp;
2791 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2792 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2793 int passone = 1;
2794 u_quad_t off, endoff, toff;
984263bc
MD
2795 struct buf **bvec = NULL;
2796#ifndef NFS_COMMITBVECSIZ
2797#define NFS_COMMITBVECSIZ 20
2798#endif
2799 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2800 int bvecsize = 0, bveccount;
2801
2802 if (nmp->nm_flag & NFSMNT_INT)
2803 slpflag = PCATCH;
2804 if (!commit)
2805 passone = 0;
2806 /*
2807 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2808 * server, but nas not been committed to stable storage on the server
2809 * yet. On the first pass, the byte range is worked out and the commit
2810 * rpc is done. On the second pass, nfs_writebp() is called to do the
2811 * job.
2812 */
2813again:
2814 off = (u_quad_t)-1;
2815 endoff = 0;
2816 bvecpos = 0;
2817 if (NFS_ISV3(vp) && commit) {
2818 s = splbio();
2819 /*
2820 * Count up how many buffers waiting for a commit.
2821 */
2822 bveccount = 0;
2823 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2824 nbp = TAILQ_NEXT(bp, b_vnbufs);
2825 if (BUF_REFCNT(bp) == 0 &&
2826 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2827 == (B_DELWRI | B_NEEDCOMMIT))
2828 bveccount++;
2829 }
2830 /*
2831 * Allocate space to remember the list of bufs to commit. It is
2832 * important to use M_NOWAIT here to avoid a race with nfs_write.
2833 * If we can't get memory (for whatever reason), we will end up
2834 * committing the buffers one-by-one in the loop below.
2835 */
2836 if (bvec != NULL && bvec != bvec_on_stack)
2837 free(bvec, M_TEMP);
2838 if (bveccount > NFS_COMMITBVECSIZ) {
2839 bvec = (struct buf **)
2840 malloc(bveccount * sizeof(struct buf *),
2841 M_TEMP, M_NOWAIT);
2842 if (bvec == NULL) {
2843 bvec = bvec_on_stack;
2844 bvecsize = NFS_COMMITBVECSIZ;
2845 } else
2846 bvecsize = bveccount;
2847 } else {
2848 bvec = bvec_on_stack;
2849 bvecsize = NFS_COMMITBVECSIZ;
2850 }
2851 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2852 nbp = TAILQ_NEXT(bp, b_vnbufs);
2853 if (bvecpos >= bvecsize)
2854 break;
2855 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2856 (B_DELWRI | B_NEEDCOMMIT) ||
2857 BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
2858 continue;
2859 bremfree(bp);
2860 /*
984263bc
MD
2861 * NOTE: we are not clearing B_DONE here, so we have
2862 * to do it later on in this routine if we intend to
2863 * initiate I/O on the bp.
2864 *
2865 * Note: to avoid loopback deadlocks, we do not
2866 * assign b_runningbufspace.
2867 */
984263bc
MD
2868 bp->b_flags |= B_WRITEINPROG;
2869 vfs_busy_pages(bp, 1);
2870
2871 /*
2872 * bp is protected by being locked, but nbp is not
2873 * and vfs_busy_pages() may sleep. We have to
2874 * recalculate nbp.
2875 */
2876 nbp = TAILQ_NEXT(bp, b_vnbufs);
2877
2878 /*
2879 * A list of these buffers is kept so that the
2880 * second loop knows which buffers have actually
2881 * been committed. This is necessary, since there
2882 * may be a race between the commit rpc and new
2883 * uncommitted writes on the file.
2884 */
2885 bvec[bvecpos++] = bp;
2886 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2887 bp->b_dirtyoff;
2888 if (toff < off)
2889 off = toff;
2890 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2891 if (toff > endoff)
2892 endoff = toff;
2893 }
2894 splx(s);
2895 }
2896 if (bvecpos > 0) {
2897 /*
3b568787
MD
2898 * Commit data on the server, as required. Note that
2899 * nfs_commit will use the vnode's cred for the commit.
984263bc 2900 */
3b568787 2901 retv = nfs_commit(vp, off, (int)(endoff - off), td);
984263bc
MD
2902
2903 if (retv == NFSERR_STALEWRITEVERF)
2904 nfs_clearcommit(vp->v_mount);
2905
2906 /*
2907 * Now, either mark the blocks I/O done or mark the
2908 * blocks dirty, depending on whether the commit
2909 * succeeded.
2910 */
2911 for (i = 0; i < bvecpos; i++) {
2912 bp = bvec[i];
2913 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG | B_CLUSTEROK);
2914 if (retv) {
2915 /*
2916 * Error, leave B_DELWRI intact
2917 */
2918 vfs_unbusy_pages(bp);
2919 brelse(bp);
2920 } else {
2921 /*
2922 * Success, remove B_DELWRI ( bundirty() ).
2923 *
2924 * b_dirtyoff/b_dirtyend seem to be NFS
2925 * specific. We should probably move that
2926 * into bundirty(). XXX
2927 */
2928 s = splbio();
2929 vp->v_numoutput++;
2930 bp->b_flags |= B_ASYNC;
2931 bundirty(bp);
2932 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR);
2933 bp->b_dirtyoff = bp->b_dirtyend = 0;
2934 splx(s);
2935 biodone(bp);
2936 }
2937 }
2938 }
2939
2940 /*
2941 * Start/do any write(s) that are required.
2942 */
2943loop:
2944 s = splbio();
2945 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2946 nbp = TAILQ_NEXT(bp, b_vnbufs);
2947 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) {
2948 if (waitfor != MNT_WAIT || passone)
2949 continue;
2950 error = BUF_TIMELOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL,
2951 "nfsfsync", slpflag, slptimeo);
2952 splx(s);
2953 if (error == 0)
2954 panic("nfs_fsync: inconsistent lock");
2955 if (error == ENOLCK)
2956 goto loop;
dadab5e9 2957 if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) {
984263bc
MD
2958 error = EINTR;
2959 goto done;
2960 }
2961 if (slpflag == PCATCH) {
2962 slpflag = 0;
2963 slptimeo = 2 * hz;
2964 }
2965 goto loop;
2966 }
2967 if ((bp->b_flags & B_DELWRI) == 0)
2968 panic("nfs_fsync: not dirty");
2969 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
2970 BUF_UNLOCK(bp);
2971 continue;
2972 }
2973 bremfree(bp);
2974 if (passone || !commit)
2975 bp->b_flags |= B_ASYNC;
2976 else
2977 bp->b_flags |= B_ASYNC | B_WRITEINPROG;
2978 splx(s);
2979 VOP_BWRITE(bp->b_vp, bp);
2980 goto loop;
2981 }
2982 splx(s);
2983 if (passone) {
2984 passone = 0;
2985 goto again;
2986 }
2987 if (waitfor == MNT_WAIT) {
2988 while (vp->v_numoutput) {
2989 vp->v_flag |= VBWAIT;
2990 error = tsleep((caddr_t)&vp->v_numoutput,
377d4740 2991 slpflag, "nfsfsync", slptimeo);
984263bc 2992 if (error) {
dadab5e9 2993 if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) {
984263bc
MD
2994 error = EINTR;
2995 goto done;
2996 }
2997 if (slpflag == PCATCH) {
2998 slpflag = 0;
2999 slptimeo = 2 * hz;
3000 }
3001 }
3002 }
3003 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd) && commit) {
3004 goto loop;
3005 }
3006 }
3007 if (np->n_flag & NWRITEERR) {
3008 error = np->n_error;
3009 np->n_flag &= ~NWRITEERR;
3010 }
3011done:
3012 if (bvec != NULL && bvec != bvec_on_stack)
3013 free(bvec, M_TEMP);
3014 return (error);
3015}
3016
3017/*
3018 * NFS advisory byte-level locks.
3019 * Currently unsupported.
e851b29e
CP
3020 *
3021 * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl,
3022 * int a_flags)
984263bc
MD
3023 */
3024static int
e851b29e 3025nfs_advlock(struct vop_advlock_args *ap)
984263bc 3026{
40393ded 3027 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3028
3029 /*
3030 * The following kludge is to allow diskless support to work
3031 * until a real NFS lockd is implemented. Basically, just pretend
3032 * that this is a local lock.
3033 */
3034 return (lf_advlock(ap, &(np->n_lockf), np->n_size));
3035}
3036
3037/*
3038 * Print out the contents of an nfsnode.
e851b29e
CP
3039 *
3040 * nfs_print(struct vnode *a_vp)
984263bc
MD
3041 */
3042static int
e851b29e 3043nfs_print(struct vop_print_args *ap)
984263bc 3044{
40393ded
RG
3045 struct vnode *vp = ap->a_vp;
3046 struct nfsnode *np = VTONFS(vp);
984263bc
MD
3047
3048 printf("tag VT_NFS, fileid %ld fsid 0x%x",
3049 np->n_vattr.va_fileid, np->n_vattr.va_fsid);
3050 if (vp->v_type == VFIFO)
3051 fifo_printinfo(vp);
3052 printf("\n");
3053 return (0);
3054}
3055
3056/*
3057 * Just call nfs_writebp() with the force argument set to 1.
3058 *
3059 * NOTE: B_DONE may or may not be set in a_bp on call.
e851b29e
CP
3060 *
3061 * nfs_bwrite(struct vnode *a_bp)
984263bc
MD
3062 */
3063static int
e851b29e 3064nfs_bwrite(struct vop_bwrite_args *ap)
984263bc 3065{
dadab5e9 3066 return (nfs_writebp(ap->a_bp, 1, curthread));
984263bc
MD
3067}
3068
3069/*
3070 * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless
3071 * the force flag is one and it also handles the B_NEEDCOMMIT flag. We set
3072 * B_CACHE if this is a VMIO buffer.
3073 */
3074int
e851b29e 3075nfs_writebp(struct buf *bp, int force, struct thread *td)
984263bc
MD
3076{
3077 int s;
3078 int oldflags = bp->b_flags;
3079#if 0
3080 int retv = 1;
3081 off_t off;
3082#endif
3083
3084 if (BUF_REFCNT(bp) == 0)
3085 panic("bwrite: buffer is not locked???");
3086
3087 if (bp->b_flags & B_INVAL) {
3088 brelse(bp);
3089 return(0);
3090 }
3091
3092 bp->b_flags |= B_CACHE;
3093
3094 /*
3095 * Undirty the bp. We will redirty it later if the I/O fails.
3096 */
3097
3098 s = splbio();
3099 bundirty(bp);
3100 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR);
3101
3102 bp->b_vp->v_numoutput++;
984263bc
MD
3103 splx(s);
3104
3105 /*
3106 * Note: to avoid loopback deadlocks, we do not
3107 * assign b_runningbufspace.
3108 */
3109 vfs_busy_pages(bp, 1);
3110
3111 if (force)
3112 bp->b_flags |= B_WRITEINPROG;
3113 BUF_KERNPROC(bp);
3114 VOP_STRATEGY(bp->b_vp, bp);
3115
3116 if( (oldflags & B_ASYNC) == 0) {
3117 int rtval = biowait(bp);
3118
3119 if (oldflags & B_DELWRI) {
3120 s = splbio();
3121 reassignbuf(bp, bp->b_vp);
3122 splx(s);
3123 }
3124
3125 brelse(bp);
3126 return (rtval);
3127 }
3128
3129 return (0);
3130}
3131
3132/*
3133 * nfs special file access vnode op.
3134 * Essentially just get vattr and then imitate iaccess() since the device is
3135 * local to the client.
e851b29e
CP
3136 *
3137 * nfsspec_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
3138 * struct thread *a_td)
984263bc
MD
3139 */
3140static int
e851b29e 3141nfsspec_access(struct vop_access_args *ap)
984263bc 3142{
40393ded
RG
3143 struct vattr *vap;
3144 gid_t *gp;
3145 struct ucred *cred = ap->a_cred;
984263bc
MD
3146 struct vnode *vp = ap->a_vp;
3147 mode_t mode = ap->a_mode;
3148 struct vattr vattr;
40393ded 3149 int i;
984263bc
MD
3150 int error;
3151
3152 /*
3153 * Disallow write attempts on filesystems mounted read-only;
3154 * unless the file is a socket, fifo, or a block or character
3155 * device resident on the filesystem.
3156 */
3157 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3158 switch (vp->v_type) {
3159 case VREG:
3160 case VDIR:
3161 case VLNK:
3162 return (EROFS);
3163 default:
3164 break;
3165 }
3166 }
3167 /*
3168 * If you're the super-user,
3169 * you always get access.
3170 */
3171 if (cred->cr_uid == 0)
3172 return (0);
3173 vap = &vattr;
3b568787 3174 error = VOP_GETATTR(vp, vap, ap->a_td);
984263bc
MD
3175 if (error)
3176 return (error);
3177 /*
3178 * Access check is based on only one of owner, group, public.
3179 * If not owner, then check group. If not a member of the
3180 * group, then check public access.
3181 */
3182 if (cred->cr_uid != vap->va_uid) {
3183 mode >>= 3;
3184 gp = cred->cr_groups;
3185 for (i = 0; i < cred->cr_ngroups; i++, gp++)
3186 if (vap->va_gid == *gp)
3187 goto found;
3188 mode >>= 3;
3189found:
3190 ;
3191 }
3192 error = (vap->va_mode & mode) == mode ? 0 : EACCES;
3193 return (error);
3194}
3195
3196/*
3197 * Read wrapper for special devices.
e851b29e
CP
3198 *
3199 * nfsspec_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3200 * struct ucred *a_cred)
984263bc
MD
3201 */
3202static int
e851b29e 3203nfsspec_read(struct vop_read_args *ap)
984263bc 3204{
40393ded 3205 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3206
3207 /*
3208 * Set access flag.
3209 */
3210 np->n_flag |= NACC;
3211 getnanotime(&np->n_atim);
0961aa92 3212 return (VOCALL(spec_vnode_vops, &ap->a_head));
984263bc
MD
3213}
3214
3215/*
3216 * Write wrapper for special devices.
e851b29e
CP
3217 *
3218 * nfsspec_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3219 * struct ucred *a_cred)
984263bc
MD
3220 */
3221static int
e851b29e 3222nfsspec_write(struct vop_write_args *ap)
984263bc 3223{
40393ded 3224 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3225
3226 /*
3227 * Set update flag.
3228 */
3229 np->n_flag |= NUPD;
3230 getnanotime(&np->n_mtim);
0961aa92 3231 return (VOCALL(spec_vnode_vops, &ap->a_head));
984263bc
MD
3232}
3233
3234/*
3235 * Close wrapper for special devices.
3236 *
3237 * Update the times on the nfsnode then do device close.
e851b29e
CP
3238 *
3239 * nfsspec_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
3240 * struct thread *a_td)
984263bc
MD
3241 */
3242static int
e851b29e 3243nfsspec_close(struct vop_close_args *ap)
984263bc 3244{
40393ded
RG
3245 struct vnode *vp = ap->a_vp;
3246 struct nfsnode *np = VTONFS(vp);
984263bc
MD
3247 struct vattr vattr;
3248
3249 if (np->n_flag & (NACC | NUPD)) {
3250 np->n_flag |= NCHG;
3251 if (vp->v_usecount == 1 &&
3252 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3253 VATTR_NULL(&vattr);
3254 if (np->n_flag & NACC)
3255 vattr.va_atime = np->n_atim;
3256 if (np->n_flag & NUPD)
3257 vattr.va_mtime = np->n_mtim;
c1cf1e59 3258 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE), ap->a_td);
984263bc
MD
3259 }
3260 }
0961aa92 3261 return (VOCALL(spec_vnode_vops, &ap->a_head));
984263bc
MD
3262}
3263
3264/*
3265 * Read wrapper for fifos.
e851b29e
CP
3266 *
3267 * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3268 * struct ucred *a_cred)
984263bc
MD
3269 */
3270static int
e851b29e 3271nfsfifo_read(struct vop_read_args *ap)
984263bc 3272{
40393ded 3273 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3274
3275 /*
3276 * Set access flag.
3277 */
3278 np->n_flag |= NACC;
3279 getnanotime(&np->n_atim);
0961aa92 3280 return (VOCALL(fifo_vnode_vops, &ap->a_head));
984263bc
MD
3281}
3282
3283/*
3284 * Write wrapper for fifos.
e851b29e
CP
3285 *
3286 * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3287 * struct ucred *a_cred)
984263bc
MD
3288 */
3289static int
e851b29e 3290nfsfifo_write(struct vop_write_args *ap)
984263bc 3291{
40393ded 3292 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3293
3294 /*
3295 * Set update flag.
3296 */
3297 np->n_flag |= NUPD;
3298 getnanotime(&np->n_mtim);
0961aa92 3299 return (VOCALL(fifo_vnode_vops, &ap->a_head));
984263bc
MD
3300}
3301
3302/*
3303 * Close wrapper for fifos.
3304 *
3305 * Update the times on the nfsnode then do fifo close.
e851b29e
CP
3306 *
3307 * nfsfifo_close(struct vnode *a_vp, int a_fflag, struct thread *a_td)
984263bc
MD
3308 */
3309static int
e851b29e 3310nfsfifo_close(struct vop_close_args *ap)
984263bc 3311{
40393ded
RG
3312 struct vnode *vp = ap->a_vp;
3313 struct nfsnode *np = VTONFS(vp);
984263bc
MD
3314 struct vattr vattr;
3315 struct timespec ts;
3316
3317 if (np->n_flag & (NACC | NUPD)) {
3318 getnanotime(&ts);
3319 if (np->n_flag & NACC)
3320 np->n_atim = ts;
3321 if (np->n_flag & NUPD)
3322 np->n_mtim = ts;
3323 np->n_flag |= NCHG;
3324 if (vp->v_usecount == 1 &&
3325 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3326 VATTR_NULL(&vattr);
3327 if (np->n_flag & NACC)
3328 vattr.va_atime = np->n_atim;
3329 if (np->n_flag & NUPD)
3330 vattr.va_mtime = np->n_mtim;
c1cf1e59 3331 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE), ap->a_td);
984263bc
MD
3332 }
3333 }
0961aa92 3334 return (VOCALL(fifo_vnode_vops, &ap->a_head));
984263bc
MD
3335}
3336