This commit represents a major revamping of the clock interrupt and timebase
[dragonfly.git] / sys / vfs / nfs / nfs_vnops.c
CommitLineData
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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 $
09b1ee9b 38 * $DragonFly: src/sys/vfs/nfs/nfs_vnops.c,v 1.16 2004/01/23 23:00:52 dillon Exp $
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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
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71#include <sys/buf2.h>
72
1f2de5d4 73#include <vfs/fifofs/fifo.h>
984263bc 74
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75#include "rpcv2.h"
76#include "nfsproto.h"
77#include "nfs.h"
1f2de5d4 78#include "nfsmount.h"
c1cf1e59 79#include "nfsnode.h"
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80#include "xdr_subs.h"
81#include "nfsm_subs.h"
82#include "nqnfs.h"
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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
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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
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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 *);
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138/*
139 * Global vfs data structures for nfs
140 */
141vop_t **nfsv2_vnodeop_p;
142static struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = {
143 { &vop_default_desc, (vop_t *) vop_defaultop },
144 { &vop_access_desc, (vop_t *) nfs_access },
145 { &vop_advlock_desc, (vop_t *) nfs_advlock },
146 { &vop_bmap_desc, (vop_t *) nfs_bmap },
147 { &vop_bwrite_desc, (vop_t *) nfs_bwrite },
148 { &vop_close_desc, (vop_t *) nfs_close },
149 { &vop_create_desc, (vop_t *) nfs_create },
150 { &vop_fsync_desc, (vop_t *) nfs_fsync },
151 { &vop_getattr_desc, (vop_t *) nfs_getattr },
152 { &vop_getpages_desc, (vop_t *) nfs_getpages },
153 { &vop_putpages_desc, (vop_t *) nfs_putpages },
154 { &vop_inactive_desc, (vop_t *) nfs_inactive },
155 { &vop_islocked_desc, (vop_t *) vop_stdislocked },
156 { &vop_lease_desc, (vop_t *) vop_null },
157 { &vop_link_desc, (vop_t *) nfs_link },
158 { &vop_lock_desc, (vop_t *) vop_sharedlock },
159 { &vop_lookup_desc, (vop_t *) nfs_lookup },
160 { &vop_mkdir_desc, (vop_t *) nfs_mkdir },
161 { &vop_mknod_desc, (vop_t *) nfs_mknod },
162 { &vop_mmap_desc, (vop_t *) nfs_mmap },
163 { &vop_open_desc, (vop_t *) nfs_open },
164 { &vop_poll_desc, (vop_t *) nfs_poll },
165 { &vop_print_desc, (vop_t *) nfs_print },
166 { &vop_read_desc, (vop_t *) nfs_read },
167 { &vop_readdir_desc, (vop_t *) nfs_readdir },
168 { &vop_readlink_desc, (vop_t *) nfs_readlink },
169 { &vop_reclaim_desc, (vop_t *) nfs_reclaim },
170 { &vop_remove_desc, (vop_t *) nfs_remove },
171 { &vop_rename_desc, (vop_t *) nfs_rename },
172 { &vop_rmdir_desc, (vop_t *) nfs_rmdir },
173 { &vop_setattr_desc, (vop_t *) nfs_setattr },
174 { &vop_strategy_desc, (vop_t *) nfs_strategy },
175 { &vop_symlink_desc, (vop_t *) nfs_symlink },
176 { &vop_unlock_desc, (vop_t *) vop_stdunlock },
177 { &vop_write_desc, (vop_t *) nfs_write },
178 { NULL, NULL }
179};
180static struct vnodeopv_desc nfsv2_vnodeop_opv_desc =
181 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries };
182VNODEOP_SET(nfsv2_vnodeop_opv_desc);
183
184/*
185 * Special device vnode ops
186 */
187vop_t **spec_nfsv2nodeop_p;
188static struct vnodeopv_entry_desc nfsv2_specop_entries[] = {
189 { &vop_default_desc, (vop_t *) spec_vnoperate },
190 { &vop_access_desc, (vop_t *) nfsspec_access },
191 { &vop_close_desc, (vop_t *) nfsspec_close },
192 { &vop_fsync_desc, (vop_t *) nfs_fsync },
193 { &vop_getattr_desc, (vop_t *) nfs_getattr },
194 { &vop_inactive_desc, (vop_t *) nfs_inactive },
195 { &vop_islocked_desc, (vop_t *) vop_stdislocked },
196 { &vop_lock_desc, (vop_t *) vop_sharedlock },
197 { &vop_print_desc, (vop_t *) nfs_print },
198 { &vop_read_desc, (vop_t *) nfsspec_read },
199 { &vop_reclaim_desc, (vop_t *) nfs_reclaim },
200 { &vop_setattr_desc, (vop_t *) nfs_setattr },
201 { &vop_unlock_desc, (vop_t *) vop_stdunlock },
202 { &vop_write_desc, (vop_t *) nfsspec_write },
203 { NULL, NULL }
204};
205static struct vnodeopv_desc spec_nfsv2nodeop_opv_desc =
206 { &spec_nfsv2nodeop_p, nfsv2_specop_entries };
207VNODEOP_SET(spec_nfsv2nodeop_opv_desc);
208
209vop_t **fifo_nfsv2nodeop_p;
210static struct vnodeopv_entry_desc nfsv2_fifoop_entries[] = {
211 { &vop_default_desc, (vop_t *) fifo_vnoperate },
212 { &vop_access_desc, (vop_t *) nfsspec_access },
213 { &vop_close_desc, (vop_t *) nfsfifo_close },
214 { &vop_fsync_desc, (vop_t *) nfs_fsync },
215 { &vop_getattr_desc, (vop_t *) nfs_getattr },
216 { &vop_inactive_desc, (vop_t *) nfs_inactive },
217 { &vop_islocked_desc, (vop_t *) vop_stdislocked },
218 { &vop_lock_desc, (vop_t *) vop_sharedlock },
219 { &vop_print_desc, (vop_t *) nfs_print },
220 { &vop_read_desc, (vop_t *) nfsfifo_read },
221 { &vop_reclaim_desc, (vop_t *) nfs_reclaim },
222 { &vop_setattr_desc, (vop_t *) nfs_setattr },
223 { &vop_unlock_desc, (vop_t *) vop_stdunlock },
224 { &vop_write_desc, (vop_t *) nfsfifo_write },
225 { NULL, NULL }
226};
227static struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc =
228 { &fifo_nfsv2nodeop_p, nfsv2_fifoop_entries };
229VNODEOP_SET(fifo_nfsv2nodeop_opv_desc);
230
a6ee311a 231static int nfs_mknodrpc (struct vnode *dvp, struct vnode **vpp,
984263bc 232 struct componentname *cnp,
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233 struct vattr *vap);
234static int nfs_removerpc (struct vnode *dvp, const char *name,
984263bc 235 int namelen,
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236 struct ucred *cred, struct thread *td);
237static int nfs_renamerpc (struct vnode *fdvp, const char *fnameptr,
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238 int fnamelen, struct vnode *tdvp,
239 const char *tnameptr, int tnamelen,
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240 struct ucred *cred, struct thread *td);
241static int nfs_renameit (struct vnode *sdvp,
984263bc 242 struct componentname *scnp,
a6ee311a 243 struct sillyrename *sp);
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244
245/*
246 * Global variables
247 */
248extern u_int32_t nfs_true, nfs_false;
249extern u_int32_t nfs_xdrneg1;
250extern struct nfsstats nfsstats;
251extern nfstype nfsv3_type[9];
dadab5e9 252struct thread *nfs_iodwant[NFS_MAXASYNCDAEMON];
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253struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON];
254int nfs_numasync = 0;
255#define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1))
256
257SYSCTL_DECL(_vfs_nfs);
258
259static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
260SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
261 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
262
263static int nfsv3_commit_on_close = 0;
264SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
265 &nfsv3_commit_on_close, 0, "write+commit on close, else only write");
266#if 0
267SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
268 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
269
270SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
271 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
272#endif
273
274#define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \
275 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \
276 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP)
277static int
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278nfs3_access_otw(struct vnode *vp, int wmode,
279 struct thread *td, struct ucred *cred)
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280{
281 const int v3 = 1;
282 u_int32_t *tl;
283 int error = 0, attrflag;
284
285 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
286 caddr_t bpos, dpos, cp2;
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287 int32_t t1, t2;
288 caddr_t cp;
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289 u_int32_t rmode;
290 struct nfsnode *np = VTONFS(vp);
291
292 nfsstats.rpccnt[NFSPROC_ACCESS]++;
293 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED);
294 nfsm_fhtom(vp, v3);
295 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
296 *tl = txdr_unsigned(wmode);
dadab5e9 297 nfsm_request(vp, NFSPROC_ACCESS, td, cred);
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298 nfsm_postop_attr(vp, attrflag);
299 if (!error) {
300 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
301 rmode = fxdr_unsigned(u_int32_t, *tl);
302 np->n_mode = rmode;
303 np->n_modeuid = cred->cr_uid;
304 np->n_modestamp = time_second;
305 }
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306 m_freem(mrep);
307nfsmout:
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308 return error;
309}
310
311/*
312 * nfs access vnode op.
313 * For nfs version 2, just return ok. File accesses may fail later.
314 * For nfs version 3, use the access rpc to check accessibility. If file modes
315 * are changed on the server, accesses might still fail later.
316 */
317static int
318nfs_access(ap)
319 struct vop_access_args /* {
320 struct vnode *a_vp;
321 int a_mode;
322 struct ucred *a_cred;
dadab5e9 323 struct thread *a_td;
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324 } */ *ap;
325{
40393ded 326 struct vnode *vp = ap->a_vp;
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327 int error = 0;
328 u_int32_t mode, wmode;
329 int v3 = NFS_ISV3(vp);
330 struct nfsnode *np = VTONFS(vp);
331
332 /*
333 * Disallow write attempts on filesystems mounted read-only;
334 * unless the file is a socket, fifo, or a block or character
335 * device resident on the filesystem.
336 */
337 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
338 switch (vp->v_type) {
339 case VREG:
340 case VDIR:
341 case VLNK:
342 return (EROFS);
343 default:
344 break;
345 }
346 }
347 /*
348 * For nfs v3, check to see if we have done this recently, and if
349 * so return our cached result instead of making an ACCESS call.
350 * If not, do an access rpc, otherwise you are stuck emulating
351 * ufs_access() locally using the vattr. This may not be correct,
352 * since the server may apply other access criteria such as
353 * client uid-->server uid mapping that we do not know about.
354 */
355 if (v3) {
356 if (ap->a_mode & VREAD)
357 mode = NFSV3ACCESS_READ;
358 else
359 mode = 0;
360 if (vp->v_type != VDIR) {
361 if (ap->a_mode & VWRITE)
362 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
363 if (ap->a_mode & VEXEC)
364 mode |= NFSV3ACCESS_EXECUTE;
365 } else {
366 if (ap->a_mode & VWRITE)
367 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
368 NFSV3ACCESS_DELETE);
369 if (ap->a_mode & VEXEC)
370 mode |= NFSV3ACCESS_LOOKUP;
371 }
372 /* XXX safety belt, only make blanket request if caching */
373 if (nfsaccess_cache_timeout > 0) {
374 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY |
375 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE |
376 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP;
377 } else {
378 wmode = mode;
379 }
380
381 /*
382 * Does our cached result allow us to give a definite yes to
383 * this request?
384 */
385 if ((time_second < (np->n_modestamp + nfsaccess_cache_timeout)) &&
386 (ap->a_cred->cr_uid == np->n_modeuid) &&
387 ((np->n_mode & mode) == mode)) {
388 nfsstats.accesscache_hits++;
389 } else {
390 /*
391 * Either a no, or a don't know. Go to the wire.
392 */
393 nfsstats.accesscache_misses++;
dadab5e9 394 error = nfs3_access_otw(vp, wmode, ap->a_td,ap->a_cred);
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395 if (!error) {
396 if ((np->n_mode & mode) != mode) {
397 error = EACCES;
398 }
399 }
400 }
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401 } else {
402 if ((error = nfsspec_access(ap)) != 0)
403 return (error);
404
405 /*
406 * Attempt to prevent a mapped root from accessing a file
407 * which it shouldn't. We try to read a byte from the file
408 * if the user is root and the file is not zero length.
409 * After calling nfsspec_access, we should have the correct
410 * file size cached.
411 */
412 if (ap->a_cred->cr_uid == 0 && (ap->a_mode & VREAD)
413 && VTONFS(vp)->n_size > 0) {
414 struct iovec aiov;
415 struct uio auio;
416 char buf[1];
417
418 aiov.iov_base = buf;
419 aiov.iov_len = 1;
420 auio.uio_iov = &aiov;
421 auio.uio_iovcnt = 1;
422 auio.uio_offset = 0;
423 auio.uio_resid = 1;
424 auio.uio_segflg = UIO_SYSSPACE;
425 auio.uio_rw = UIO_READ;
dadab5e9 426 auio.uio_td = ap->a_td;
984263bc 427
c1cf1e59 428 if (vp->v_type == VREG) {
3b568787 429 error = nfs_readrpc(vp, &auio);
c1cf1e59 430 } else if (vp->v_type == VDIR) {
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431 char* bp;
432 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
433 aiov.iov_base = bp;
434 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
3b568787 435 error = nfs_readdirrpc(vp, &auio);
984263bc 436 free(bp, M_TEMP);
c1cf1e59 437 } else if (vp->v_type == VLNK) {
3b568787 438 error = nfs_readlinkrpc(vp, &auio);
c1cf1e59 439 } else {
984263bc 440 error = EACCES;
c1cf1e59 441 }
984263bc 442 }
984263bc 443 }
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444 /*
445 * [re]record creds for reading and/or writing if access
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446 * was granted. Assume the NFS server will grant read access
447 * for execute requests.
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448 */
449 if (error == 0) {
09b1ee9b 450 if ((ap->a_mode & (VREAD|VEXEC)) && ap->a_cred != np->n_rucred) {
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451 crhold(ap->a_cred);
452 if (np->n_rucred)
453 crfree(np->n_rucred);
454 np->n_rucred = ap->a_cred;
455 }
456 if ((ap->a_mode & VWRITE) && ap->a_cred != np->n_wucred) {
457 crhold(ap->a_cred);
458 if (np->n_wucred)
459 crfree(np->n_wucred);
460 np->n_wucred = ap->a_cred;
461 }
462 }
463 return(error);
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464}
465
466/*
467 * nfs open vnode op
468 * Check to see if the type is ok
469 * and that deletion is not in progress.
470 * For paged in text files, you will need to flush the page cache
471 * if consistency is lost.
472 */
473/* ARGSUSED */
474static int
475nfs_open(ap)
476 struct vop_open_args /* {
477 struct vnode *a_vp;
478 int a_mode;
479 struct ucred *a_cred;
dadab5e9 480 struct thread *a_td;
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481 } */ *ap;
482{
40393ded 483 struct vnode *vp = ap->a_vp;
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484 struct nfsnode *np = VTONFS(vp);
485 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
486 struct vattr vattr;
487 int error;
488
489 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
490#ifdef DIAGNOSTIC
491 printf("open eacces vtyp=%d\n",vp->v_type);
492#endif
493 return (EACCES);
494 }
495 /*
496 * Get a valid lease. If cached data is stale, flush it.
497 */
498 if (nmp->nm_flag & NFSMNT_NQNFS) {
499 if (NQNFS_CKINVALID(vp, np, ND_READ)) {
500 do {
3b568787 501 error = nqnfs_getlease(vp, ND_READ, ap->a_td);
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502 } while (error == NQNFS_EXPIRED);
503 if (error)
504 return (error);
505 if (np->n_lrev != np->n_brev ||
506 (np->n_flag & NQNFSNONCACHE)) {
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507 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1))
508 == EINTR) {
984263bc 509 return (error);
3b568787 510 }
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511 np->n_brev = np->n_lrev;
512 }
513 }
514 } else {
515 if (np->n_flag & NMODIFIED) {
3b568787
MD
516 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1))
517 == EINTR) {
984263bc 518 return (error);
3b568787 519 }
984263bc
MD
520 np->n_attrstamp = 0;
521 if (vp->v_type == VDIR)
522 np->n_direofoffset = 0;
3b568787 523 error = VOP_GETATTR(vp, &vattr, ap->a_td);
984263bc
MD
524 if (error)
525 return (error);
526 np->n_mtime = vattr.va_mtime.tv_sec;
527 } else {
3b568787 528 error = VOP_GETATTR(vp, &vattr, ap->a_td);
984263bc
MD
529 if (error)
530 return (error);
531 if (np->n_mtime != vattr.va_mtime.tv_sec) {
532 if (vp->v_type == VDIR)
533 np->n_direofoffset = 0;
534 if ((error = nfs_vinvalbuf(vp, V_SAVE,
3b568787 535 ap->a_td, 1)) == EINTR) {
984263bc 536 return (error);
3b568787 537 }
984263bc
MD
538 np->n_mtime = vattr.va_mtime.tv_sec;
539 }
540 }
541 }
542 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0)
543 np->n_attrstamp = 0; /* For Open/Close consistency */
544 return (0);
545}
546
547/*
548 * nfs close vnode op
549 * What an NFS client should do upon close after writing is a debatable issue.
550 * Most NFS clients push delayed writes to the server upon close, basically for
551 * two reasons:
552 * 1 - So that any write errors may be reported back to the client process
553 * doing the close system call. By far the two most likely errors are
554 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
555 * 2 - To put a worst case upper bound on cache inconsistency between
556 * multiple clients for the file.
557 * There is also a consistency problem for Version 2 of the protocol w.r.t.
558 * not being able to tell if other clients are writing a file concurrently,
559 * since there is no way of knowing if the changed modify time in the reply
560 * is only due to the write for this client.
561 * (NFS Version 3 provides weak cache consistency data in the reply that
562 * should be sufficient to detect and handle this case.)
563 *
564 * The current code does the following:
565 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
566 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
567 * or commit them (this satisfies 1 and 2 except for the
568 * case where the server crashes after this close but
569 * before the commit RPC, which is felt to be "good
570 * enough". Changing the last argument to nfs_flush() to
571 * a 1 would force a commit operation, if it is felt a
572 * commit is necessary now.
573 * for NQNFS - do nothing now, since 2 is dealt with via leases and
574 * 1 should be dealt with via an fsync() system call for
575 * cases where write errors are important.
576 */
577/* ARGSUSED */
578static int
579nfs_close(ap)
580 struct vop_close_args /* {
581 struct vnodeop_desc *a_desc;
582 struct vnode *a_vp;
583 int a_fflag;
584 struct ucred *a_cred;
dadab5e9 585 struct thread *a_td;
984263bc
MD
586 } */ *ap;
587{
40393ded
RG
588 struct vnode *vp = ap->a_vp;
589 struct nfsnode *np = VTONFS(vp);
984263bc
MD
590 int error = 0;
591
592 if (vp->v_type == VREG) {
593 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 &&
594 (np->n_flag & NMODIFIED)) {
595 if (NFS_ISV3(vp)) {
596 /*
597 * Under NFSv3 we have dirty buffers to dispose of. We
598 * must flush them to the NFS server. We have the option
599 * of waiting all the way through the commit rpc or just
600 * waiting for the initial write. The default is to only
601 * wait through the initial write so the data is in the
602 * server's cache, which is roughly similar to the state
603 * a standard disk subsystem leaves the file in on close().
604 *
605 * We cannot clear the NMODIFIED bit in np->n_flag due to
606 * potential races with other processes, and certainly
607 * cannot clear it if we don't commit.
608 */
609 int cm = nfsv3_commit_on_close ? 1 : 0;
3b568787 610 error = nfs_flush(vp, MNT_WAIT, ap->a_td, cm);
984263bc
MD
611 /* np->n_flag &= ~NMODIFIED; */
612 } else {
3b568787 613 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
984263bc
MD
614 }
615 np->n_attrstamp = 0;
616 }
617 if (np->n_flag & NWRITEERR) {
618 np->n_flag &= ~NWRITEERR;
619 error = np->n_error;
620 }
621 }
622 return (error);
623}
624
625/*
626 * nfs getattr call from vfs.
627 */
628static int
629nfs_getattr(ap)
630 struct vop_getattr_args /* {
631 struct vnode *a_vp;
632 struct vattr *a_vap;
633 struct ucred *a_cred;
dadab5e9 634 struct thread *a_td;
984263bc
MD
635 } */ *ap;
636{
40393ded
RG
637 struct vnode *vp = ap->a_vp;
638 struct nfsnode *np = VTONFS(vp);
639 caddr_t cp;
640 u_int32_t *tl;
641 int32_t t1, t2;
984263bc
MD
642 caddr_t bpos, dpos;
643 int error = 0;
644 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
645 int v3 = NFS_ISV3(vp);
646
647 /*
648 * Update local times for special files.
649 */
650 if (np->n_flag & (NACC | NUPD))
651 np->n_flag |= NCHG;
652 /*
653 * First look in the cache.
654 */
655 if (nfs_getattrcache(vp, ap->a_vap) == 0)
656 return (0);
657
658 if (v3 && nfsaccess_cache_timeout > 0) {
659 nfsstats.accesscache_misses++;
c1cf1e59 660 nfs3_access_otw(vp, NFSV3ACCESS_ALL, ap->a_td, nfs_vpcred(vp, ND_CHECK));
984263bc
MD
661 if (nfs_getattrcache(vp, ap->a_vap) == 0)
662 return (0);
663 }
664
665 nfsstats.rpccnt[NFSPROC_GETATTR]++;
666 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3));
667 nfsm_fhtom(vp, v3);
c1cf1e59 668 nfsm_request(vp, NFSPROC_GETATTR, ap->a_td, nfs_vpcred(vp, ND_CHECK));
984263bc
MD
669 if (!error) {
670 nfsm_loadattr(vp, ap->a_vap);
671 }
6b08710e
MD
672 m_freem(mrep);
673nfsmout:
984263bc
MD
674 return (error);
675}
676
677/*
678 * nfs setattr call.
679 */
680static int
681nfs_setattr(ap)
682 struct vop_setattr_args /* {
683 struct vnodeop_desc *a_desc;
684 struct vnode *a_vp;
685 struct vattr *a_vap;
686 struct ucred *a_cred;
dadab5e9 687 struct thread *a_td;
984263bc
MD
688 } */ *ap;
689{
40393ded
RG
690 struct vnode *vp = ap->a_vp;
691 struct nfsnode *np = VTONFS(vp);
692 struct vattr *vap = ap->a_vap;
984263bc
MD
693 int error = 0;
694 u_quad_t tsize;
695
696#ifndef nolint
697 tsize = (u_quad_t)0;
698#endif
699
700 /*
701 * Setting of flags is not supported.
702 */
703 if (vap->va_flags != VNOVAL)
704 return (EOPNOTSUPP);
705
706 /*
707 * Disallow write attempts if the filesystem is mounted read-only.
708 */
709 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
710 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
711 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
712 (vp->v_mount->mnt_flag & MNT_RDONLY))
713 return (EROFS);
714 if (vap->va_size != VNOVAL) {
715 switch (vp->v_type) {
716 case VDIR:
717 return (EISDIR);
718 case VCHR:
719 case VBLK:
720 case VSOCK:
721 case VFIFO:
722 if (vap->va_mtime.tv_sec == VNOVAL &&
723 vap->va_atime.tv_sec == VNOVAL &&
724 vap->va_mode == (mode_t)VNOVAL &&
725 vap->va_uid == (uid_t)VNOVAL &&
726 vap->va_gid == (gid_t)VNOVAL)
727 return (0);
728 vap->va_size = VNOVAL;
729 break;
730 default:
731 /*
732 * Disallow write attempts if the filesystem is
733 * mounted read-only.
734 */
735 if (vp->v_mount->mnt_flag & MNT_RDONLY)
736 return (EROFS);
737
738 /*
739 * We run vnode_pager_setsize() early (why?),
740 * we must set np->n_size now to avoid vinvalbuf
741 * V_SAVE races that might setsize a lower
742 * value.
743 */
744
745 tsize = np->n_size;
3b568787 746 error = nfs_meta_setsize(vp, ap->a_td, vap->va_size);
984263bc
MD
747
748 if (np->n_flag & NMODIFIED) {
749 if (vap->va_size == 0)
3b568787 750 error = nfs_vinvalbuf(vp, 0, ap->a_td, 1);
984263bc 751 else
3b568787 752 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
984263bc
MD
753 if (error) {
754 np->n_size = tsize;
755 vnode_pager_setsize(vp, np->n_size);
756 return (error);
757 }
758 }
b07fc55c
DR
759 /* np->n_size has already been set to vap->va_size
760 * in nfs_meta_setsize(). We must set it again since
761 * nfs_loadattrcache() could be called through
762 * nfs_meta_setsize() and could modify np->n_size.
763 */
764 np->n_vattr.va_size = np->n_size = vap->va_size;
765 };
984263bc
MD
766 } else if ((vap->va_mtime.tv_sec != VNOVAL ||
767 vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) &&
768 vp->v_type == VREG &&
3b568787 769 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1)) == EINTR)
984263bc 770 return (error);
dadab5e9 771 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_td);
984263bc
MD
772 if (error && vap->va_size != VNOVAL) {
773 np->n_size = np->n_vattr.va_size = tsize;
774 vnode_pager_setsize(vp, np->n_size);
775 }
776 return (error);
777}
778
779/*
780 * Do an nfs setattr rpc.
781 */
782static int
dadab5e9
MD
783nfs_setattrrpc(struct vnode *vp, struct vattr *vap,
784 struct ucred *cred, struct thread *td)
984263bc 785{
40393ded
RG
786 struct nfsv2_sattr *sp;
787 caddr_t cp;
788 int32_t t1, t2;
984263bc
MD
789 caddr_t bpos, dpos, cp2;
790 u_int32_t *tl;
791 int error = 0, wccflag = NFSV3_WCCRATTR;
792 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
793 int v3 = NFS_ISV3(vp);
794
795 nfsstats.rpccnt[NFSPROC_SETATTR]++;
796 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3));
797 nfsm_fhtom(vp, v3);
798 if (v3) {
799 nfsm_v3attrbuild(vap, TRUE);
800 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
801 *tl = nfs_false;
802 } else {
803 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
804 if (vap->va_mode == (mode_t)VNOVAL)
805 sp->sa_mode = nfs_xdrneg1;
806 else
807 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
808 if (vap->va_uid == (uid_t)VNOVAL)
809 sp->sa_uid = nfs_xdrneg1;
810 else
811 sp->sa_uid = txdr_unsigned(vap->va_uid);
812 if (vap->va_gid == (gid_t)VNOVAL)
813 sp->sa_gid = nfs_xdrneg1;
814 else
815 sp->sa_gid = txdr_unsigned(vap->va_gid);
816 sp->sa_size = txdr_unsigned(vap->va_size);
817 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
818 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
819 }
dadab5e9 820 nfsm_request(vp, NFSPROC_SETATTR, td, cred);
984263bc
MD
821 if (v3) {
822 nfsm_wcc_data(vp, wccflag);
823 } else
824 nfsm_loadattr(vp, (struct vattr *)0);
6b08710e
MD
825 m_freem(mrep);
826nfsmout:
984263bc
MD
827 return (error);
828}
829
830/*
831 * nfs lookup call, one step at a time...
832 * First look in cache
833 * If not found, unlock the directory nfsnode and do the rpc
834 */
835static int
836nfs_lookup(ap)
837 struct vop_lookup_args /* {
838 struct vnodeop_desc *a_desc;
839 struct vnode *a_dvp;
840 struct vnode **a_vpp;
841 struct componentname *a_cnp;
842 } */ *ap;
843{
844 struct componentname *cnp = ap->a_cnp;
845 struct vnode *dvp = ap->a_dvp;
846 struct vnode **vpp = ap->a_vpp;
847 int flags = cnp->cn_flags;
848 struct vnode *newvp;
849 u_int32_t *tl;
850 caddr_t cp;
851 int32_t t1, t2;
852 struct nfsmount *nmp;
853 caddr_t bpos, dpos, cp2;
854 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
855 long len;
856 nfsfh_t *fhp;
857 struct nfsnode *np;
858 int lockparent, wantparent, error = 0, attrflag, fhsize;
859 int v3 = NFS_ISV3(dvp);
dadab5e9 860 struct thread *td = cnp->cn_td;
984263bc
MD
861
862 *vpp = NULLVP;
2b69e610
MD
863 if ((flags & CNP_ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
864 (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME))
984263bc
MD
865 return (EROFS);
866 if (dvp->v_type != VDIR)
867 return (ENOTDIR);
2b69e610
MD
868 lockparent = flags & CNP_LOCKPARENT;
869 wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT);
984263bc
MD
870 nmp = VFSTONFS(dvp->v_mount);
871 np = VTONFS(dvp);
bc0c094e 872 if ((error = cache_lookup(dvp, NCPNULL, vpp, NCPPNULL, cnp)) && error != ENOENT) {
984263bc
MD
873 struct vattr vattr;
874 int vpid;
875
dadab5e9 876 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0) {
984263bc
MD
877 *vpp = NULLVP;
878 return (error);
879 }
880
881 newvp = *vpp;
882 vpid = newvp->v_id;
883 /*
884 * See the comment starting `Step through' in ufs/ufs_lookup.c
885 * for an explanation of the locking protocol
886 */
887 if (dvp == newvp) {
888 VREF(newvp);
889 error = 0;
2b69e610 890 } else if (flags & CNP_ISDOTDOT) {
dadab5e9
MD
891 VOP_UNLOCK(dvp, 0, td);
892 error = vget(newvp, LK_EXCLUSIVE, td);
2b69e610 893 if (!error && lockparent && (flags & CNP_ISLASTCN))
dadab5e9 894 error = vn_lock(dvp, LK_EXCLUSIVE, td);
984263bc 895 } else {
dadab5e9 896 error = vget(newvp, LK_EXCLUSIVE, td);
2b69e610 897 if (!lockparent || error || !(flags & CNP_ISLASTCN))
dadab5e9 898 VOP_UNLOCK(dvp, 0, td);
984263bc
MD
899 }
900 if (!error) {
901 if (vpid == newvp->v_id) {
3b568787 902 if (!VOP_GETATTR(newvp, &vattr, td)
984263bc
MD
903 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) {
904 nfsstats.lookupcache_hits++;
2b69e610
MD
905 if (cnp->cn_nameiop != NAMEI_LOOKUP &&
906 (flags & CNP_ISLASTCN))
907 cnp->cn_flags |= CNP_SAVENAME;
984263bc
MD
908 return (0);
909 }
910 cache_purge(newvp);
911 }
912 vput(newvp);
2b69e610 913 if (lockparent && dvp != newvp && (flags & CNP_ISLASTCN))
dadab5e9 914 VOP_UNLOCK(dvp, 0, td);
984263bc 915 }
dadab5e9 916 error = vn_lock(dvp, LK_EXCLUSIVE, td);
984263bc
MD
917 *vpp = NULLVP;
918 if (error)
919 return (error);
920 }
921 error = 0;
922 newvp = NULLVP;
923 nfsstats.lookupcache_misses++;
924 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
925 len = cnp->cn_namelen;
926 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
927 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
928 nfsm_fhtom(dvp, v3);
929 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
dadab5e9 930 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_td, cnp->cn_cred);
984263bc
MD
931 if (error) {
932 nfsm_postop_attr(dvp, attrflag);
933 m_freem(mrep);
934 goto nfsmout;
935 }
936 nfsm_getfh(fhp, fhsize, v3);
937
938 /*
939 * Handle RENAME case...
940 */
2b69e610 941 if (cnp->cn_nameiop == NAMEI_RENAME && wantparent && (flags & CNP_ISLASTCN)) {
984263bc
MD
942 if (NFS_CMPFH(np, fhp, fhsize)) {
943 m_freem(mrep);
944 return (EISDIR);
945 }
946 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
947 if (error) {
948 m_freem(mrep);
949 return (error);
950 }
951 newvp = NFSTOV(np);
952 if (v3) {
953 nfsm_postop_attr(newvp, attrflag);
954 nfsm_postop_attr(dvp, attrflag);
955 } else
956 nfsm_loadattr(newvp, (struct vattr *)0);
957 *vpp = newvp;
958 m_freem(mrep);
2b69e610 959 cnp->cn_flags |= CNP_SAVENAME;
984263bc 960 if (!lockparent)
dadab5e9 961 VOP_UNLOCK(dvp, 0, td);
984263bc
MD
962 return (0);
963 }
964
2b69e610 965 if (flags & CNP_ISDOTDOT) {
dadab5e9 966 VOP_UNLOCK(dvp, 0, td);
984263bc
MD
967 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
968 if (error) {
dadab5e9 969 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
970 return (error);
971 }
972 newvp = NFSTOV(np);
2b69e610 973 if (lockparent && (flags & CNP_ISLASTCN) &&
dadab5e9 974 (error = vn_lock(dvp, LK_EXCLUSIVE, td))) {
984263bc
MD
975 vput(newvp);
976 return (error);
977 }
978 } else if (NFS_CMPFH(np, fhp, fhsize)) {
979 VREF(dvp);
980 newvp = dvp;
981 } else {
982 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
983 if (error) {
984 m_freem(mrep);
985 return (error);
986 }
2b69e610 987 if (!lockparent || !(flags & CNP_ISLASTCN))
dadab5e9 988 VOP_UNLOCK(dvp, 0, td);
984263bc
MD
989 newvp = NFSTOV(np);
990 }
991 if (v3) {
992 nfsm_postop_attr(newvp, attrflag);
993 nfsm_postop_attr(dvp, attrflag);
994 } else
995 nfsm_loadattr(newvp, (struct vattr *)0);
2b69e610
MD
996 if (cnp->cn_nameiop != NAMEI_LOOKUP && (flags & CNP_ISLASTCN))
997 cnp->cn_flags |= CNP_SAVENAME;
998 if ((cnp->cn_flags & CNP_MAKEENTRY) &&
999 (cnp->cn_nameiop != NAMEI_DELETE || !(flags & CNP_ISLASTCN))) {
984263bc 1000 np->n_ctime = np->n_vattr.va_ctime.tv_sec;
bc0c094e 1001 cache_enter(dvp, NCPNULL, newvp, cnp);
984263bc
MD
1002 }
1003 *vpp = newvp;
6b08710e
MD
1004 m_freem(mrep);
1005nfsmout:
984263bc
MD
1006 if (error) {
1007 if (newvp != NULLVP) {
1008 vrele(newvp);
1009 *vpp = NULLVP;
1010 }
2b69e610
MD
1011 if ((cnp->cn_nameiop == NAMEI_CREATE || cnp->cn_nameiop == NAMEI_RENAME) &&
1012 (flags & CNP_ISLASTCN) && error == ENOENT) {
984263bc 1013 if (!lockparent)
dadab5e9 1014 VOP_UNLOCK(dvp, 0, td);
984263bc
MD
1015 if (dvp->v_mount->mnt_flag & MNT_RDONLY)
1016 error = EROFS;
1017 else
1018 error = EJUSTRETURN;
1019 }
2b69e610
MD
1020 if (cnp->cn_nameiop != NAMEI_LOOKUP && (flags & CNP_ISLASTCN))
1021 cnp->cn_flags |= CNP_SAVENAME;
984263bc
MD
1022 }
1023 return (error);
1024}
1025
1026/*
1027 * nfs read call.
1028 * Just call nfs_bioread() to do the work.
1029 */
1030static int
1031nfs_read(ap)
1032 struct vop_read_args /* {
1033 struct vnode *a_vp;
1034 struct uio *a_uio;
1035 int a_ioflag;
1036 struct ucred *a_cred;
1037 } */ *ap;
1038{
40393ded 1039 struct vnode *vp = ap->a_vp;
984263bc
MD
1040
1041 if (vp->v_type != VREG)
1042 return (EPERM);
3b568787 1043 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
984263bc
MD
1044}
1045
1046/*
1047 * nfs readlink call
1048 */
1049static int
1050nfs_readlink(ap)
1051 struct vop_readlink_args /* {
1052 struct vnode *a_vp;
1053 struct uio *a_uio;
1054 struct ucred *a_cred;
1055 } */ *ap;
1056{
40393ded 1057 struct vnode *vp = ap->a_vp;
984263bc
MD
1058
1059 if (vp->v_type != VLNK)
1060 return (EINVAL);
3b568787 1061 return (nfs_bioread(vp, ap->a_uio, 0));
984263bc
MD
1062}
1063
1064/*
1065 * Do a readlink rpc.
1066 * Called by nfs_doio() from below the buffer cache.
1067 */
1068int
3b568787 1069nfs_readlinkrpc(struct vnode *vp, struct uio *uiop)
984263bc 1070{
40393ded
RG
1071 u_int32_t *tl;
1072 caddr_t cp;
1073 int32_t t1, t2;
984263bc
MD
1074 caddr_t bpos, dpos, cp2;
1075 int error = 0, len, attrflag;
1076 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1077 int v3 = NFS_ISV3(vp);
1078
1079 nfsstats.rpccnt[NFSPROC_READLINK]++;
1080 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3));
1081 nfsm_fhtom(vp, v3);
c1cf1e59 1082 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_td, nfs_vpcred(vp, ND_CHECK));
984263bc
MD
1083 if (v3)
1084 nfsm_postop_attr(vp, attrflag);
1085 if (!error) {
1086 nfsm_strsiz(len, NFS_MAXPATHLEN);
1087 if (len == NFS_MAXPATHLEN) {
1088 struct nfsnode *np = VTONFS(vp);
1089 if (np->n_size && np->n_size < NFS_MAXPATHLEN)
1090 len = np->n_size;
1091 }
1092 nfsm_mtouio(uiop, len);
1093 }
6b08710e
MD
1094 m_freem(mrep);
1095nfsmout:
984263bc
MD
1096 return (error);
1097}
1098
1099/*
1100 * nfs read rpc call
1101 * Ditto above
1102 */
1103int
3b568787 1104nfs_readrpc(struct vnode *vp, struct uio *uiop)
984263bc 1105{
40393ded
RG
1106 u_int32_t *tl;
1107 caddr_t cp;
1108 int32_t t1, t2;
984263bc
MD
1109 caddr_t bpos, dpos, cp2;
1110 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1111 struct nfsmount *nmp;
1112 int error = 0, len, retlen, tsiz, eof, attrflag;
1113 int v3 = NFS_ISV3(vp);
1114
1115#ifndef nolint
1116 eof = 0;
1117#endif
1118 nmp = VFSTONFS(vp->v_mount);
1119 tsiz = uiop->uio_resid;
1120 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1121 return (EFBIG);
1122 while (tsiz > 0) {
1123 nfsstats.rpccnt[NFSPROC_READ]++;
1124 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
1125 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3);
1126 nfsm_fhtom(vp, v3);
1127 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3);
1128 if (v3) {
1129 txdr_hyper(uiop->uio_offset, tl);
1130 *(tl + 2) = txdr_unsigned(len);
1131 } else {
1132 *tl++ = txdr_unsigned(uiop->uio_offset);
1133 *tl++ = txdr_unsigned(len);
1134 *tl = 0;
1135 }
c1cf1e59 1136 nfsm_request(vp, NFSPROC_READ, uiop->uio_td, nfs_vpcred(vp, ND_READ));
984263bc
MD
1137 if (v3) {
1138 nfsm_postop_attr(vp, attrflag);
1139 if (error) {
1140 m_freem(mrep);
1141 goto nfsmout;
1142 }
1143 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1144 eof = fxdr_unsigned(int, *(tl + 1));
1145 } else
1146 nfsm_loadattr(vp, (struct vattr *)0);
1147 nfsm_strsiz(retlen, nmp->nm_rsize);
1148 nfsm_mtouio(uiop, retlen);
1149 m_freem(mrep);
1150 tsiz -= retlen;
1151 if (v3) {
1152 if (eof || retlen == 0) {
1153 tsiz = 0;
1154 }
1155 } else if (retlen < len) {
1156 tsiz = 0;
1157 }
1158 }
1159nfsmout:
1160 return (error);
1161}
1162
1163/*
1164 * nfs write call
1165 */
1166int
3b568787 1167nfs_writerpc(vp, uiop, iomode, must_commit)
40393ded
RG
1168 struct vnode *vp;
1169 struct uio *uiop;
984263bc
MD
1170 int *iomode, *must_commit;
1171{
40393ded
RG
1172 u_int32_t *tl;
1173 caddr_t cp;
1174 int32_t t1, t2, backup;
984263bc
MD
1175 caddr_t bpos, dpos, cp2;
1176 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1177 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1178 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
1179 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC;
1180
1181#ifndef DIAGNOSTIC
1182 if (uiop->uio_iovcnt != 1)
1183 panic("nfs: writerpc iovcnt > 1");
1184#endif
1185 *must_commit = 0;
1186 tsiz = uiop->uio_resid;
1187 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1188 return (EFBIG);
1189 while (tsiz > 0) {
1190 nfsstats.rpccnt[NFSPROC_WRITE]++;
1191 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1192 nfsm_reqhead(vp, NFSPROC_WRITE,
1193 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len));
1194 nfsm_fhtom(vp, v3);
1195 if (v3) {
1196 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
1197 txdr_hyper(uiop->uio_offset, tl);
1198 tl += 2;
1199 *tl++ = txdr_unsigned(len);
1200 *tl++ = txdr_unsigned(*iomode);
1201 *tl = txdr_unsigned(len);
1202 } else {
40393ded 1203 u_int32_t x;
984263bc
MD
1204
1205 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1206 /* Set both "begin" and "current" to non-garbage. */
1207 x = txdr_unsigned((u_int32_t)uiop->uio_offset);
1208 *tl++ = x; /* "begin offset" */
1209 *tl++ = x; /* "current offset" */
1210 x = txdr_unsigned(len);
1211 *tl++ = x; /* total to this offset */
1212 *tl = x; /* size of this write */
1213 }
1214 nfsm_uiotom(uiop, len);
c1cf1e59 1215 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_td, nfs_vpcred(vp, ND_WRITE));
984263bc
MD
1216 if (v3) {
1217 wccflag = NFSV3_WCCCHK;
1218 nfsm_wcc_data(vp, wccflag);
1219 if (!error) {
1220 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
1221 + NFSX_V3WRITEVERF);
1222 rlen = fxdr_unsigned(int, *tl++);
1223 if (rlen == 0) {
1224 error = NFSERR_IO;
1225 m_freem(mrep);
1226 break;
1227 } else if (rlen < len) {
1228 backup = len - rlen;
1229 uiop->uio_iov->iov_base -= backup;
1230 uiop->uio_iov->iov_len += backup;
1231 uiop->uio_offset -= backup;
1232 uiop->uio_resid += backup;
1233 len = rlen;
1234 }
1235 commit = fxdr_unsigned(int, *tl++);
1236
1237 /*
1238 * Return the lowest committment level
1239 * obtained by any of the RPCs.
1240 */
1241 if (committed == NFSV3WRITE_FILESYNC)
1242 committed = commit;
1243 else if (committed == NFSV3WRITE_DATASYNC &&
1244 commit == NFSV3WRITE_UNSTABLE)
1245 committed = commit;
1246 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){
1247 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1248 NFSX_V3WRITEVERF);
1249 nmp->nm_state |= NFSSTA_HASWRITEVERF;
1250 } else if (bcmp((caddr_t)tl,
1251 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1252 *must_commit = 1;
1253 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1254 NFSX_V3WRITEVERF);
1255 }
1256 }
1257 } else
1258 nfsm_loadattr(vp, (struct vattr *)0);
1259 if (wccflag)
1260 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec;
1261 m_freem(mrep);
1262 if (error)
1263 break;
1264 tsiz -= len;
1265 }
1266nfsmout:
1267 if (vp->v_mount->mnt_flag & MNT_ASYNC)
1268 committed = NFSV3WRITE_FILESYNC;
1269 *iomode = committed;
1270 if (error)
1271 uiop->uio_resid = tsiz;
1272 return (error);
1273}
1274
1275/*
1276 * nfs mknod rpc
1277 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1278 * mode set to specify the file type and the size field for rdev.
1279 */
1280static int
1281nfs_mknodrpc(dvp, vpp, cnp, vap)
40393ded
RG
1282 struct vnode *dvp;
1283 struct vnode **vpp;
1284 struct componentname *cnp;
1285 struct vattr *vap;
984263bc 1286{
40393ded
RG
1287 struct nfsv2_sattr *sp;
1288 u_int32_t *tl;
1289 caddr_t cp;
1290 int32_t t1, t2;
984263bc
MD
1291 struct vnode *newvp = (struct vnode *)0;
1292 struct nfsnode *np = (struct nfsnode *)0;
1293 struct vattr vattr;
1294 char *cp2;
1295 caddr_t bpos, dpos;
1296 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
1297 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1298 u_int32_t rdev;
1299 int v3 = NFS_ISV3(dvp);
1300
1301 if (vap->va_type == VCHR || vap->va_type == VBLK)
1302 rdev = txdr_unsigned(vap->va_rdev);
1303 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1304 rdev = nfs_xdrneg1;
1305 else {
1306 return (EOPNOTSUPP);
1307 }
3b568787 1308 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) {
984263bc
MD
1309 return (error);
1310 }
1311 nfsstats.rpccnt[NFSPROC_MKNOD]++;
1312 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED +
1313 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1314 nfsm_fhtom(dvp, v3);
1315 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1316 if (v3) {
1317 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1318 *tl++ = vtonfsv3_type(vap->va_type);
1319 nfsm_v3attrbuild(vap, FALSE);
1320 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1321 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1322 *tl++ = txdr_unsigned(umajor(vap->va_rdev));
1323 *tl = txdr_unsigned(uminor(vap->va_rdev));
1324 }
1325 } else {
1326 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1327 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1328 sp->sa_uid = nfs_xdrneg1;
1329 sp->sa_gid = nfs_xdrneg1;
1330 sp->sa_size = rdev;
1331 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1332 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1333 }
dadab5e9 1334 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1335 if (!error) {
1336 nfsm_mtofh(dvp, newvp, v3, gotvp);
1337 if (!gotvp) {
1338 if (newvp) {
1339 vput(newvp);
1340 newvp = (struct vnode *)0;
1341 }
1342 error = nfs_lookitup(dvp, cnp->cn_nameptr,
dadab5e9 1343 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
984263bc
MD
1344 if (!error)
1345 newvp = NFSTOV(np);
1346 }
1347 }
1348 if (v3)
1349 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1350 m_freem(mrep);
1351nfsmout:
984263bc
MD
1352 if (error) {
1353 if (newvp)
1354 vput(newvp);
1355 } else {
2b69e610 1356 if (cnp->cn_flags & CNP_MAKEENTRY)
bc0c094e 1357 cache_enter(dvp, NCPNULL, newvp, cnp);
984263bc
MD
1358 *vpp = newvp;
1359 }
1360 VTONFS(dvp)->n_flag |= NMODIFIED;
1361 if (!wccflag)
1362 VTONFS(dvp)->n_attrstamp = 0;
1363 return (error);
1364}
1365
1366/*
1367 * nfs mknod vop
1368 * just call nfs_mknodrpc() to do the work.
1369 */
1370/* ARGSUSED */
1371static int
1372nfs_mknod(ap)
1373 struct vop_mknod_args /* {
1374 struct vnode *a_dvp;
1375 struct vnode **a_vpp;
1376 struct componentname *a_cnp;
1377 struct vattr *a_vap;
1378 } */ *ap;
1379{
1380 return nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1381}
1382
1383static u_long create_verf;
1384/*
1385 * nfs file create call
1386 */
1387static int
1388nfs_create(ap)
1389 struct vop_create_args /* {
1390 struct vnode *a_dvp;
1391 struct vnode **a_vpp;
1392 struct componentname *a_cnp;
1393 struct vattr *a_vap;
1394 } */ *ap;
1395{
40393ded
RG
1396 struct vnode *dvp = ap->a_dvp;
1397 struct vattr *vap = ap->a_vap;
1398 struct componentname *cnp = ap->a_cnp;
1399 struct nfsv2_sattr *sp;
1400 u_int32_t *tl;
1401 caddr_t cp;
1402 int32_t t1, t2;
984263bc
MD
1403 struct nfsnode *np = (struct nfsnode *)0;
1404 struct vnode *newvp = (struct vnode *)0;
1405 caddr_t bpos, dpos, cp2;
1406 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
1407 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1408 struct vattr vattr;
1409 int v3 = NFS_ISV3(dvp);
1410
1411 /*
1412 * Oops, not for me..
1413 */
1414 if (vap->va_type == VSOCK)
1415 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1416
3b568787 1417 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) {
984263bc
MD
1418 return (error);
1419 }
1420 if (vap->va_vaflags & VA_EXCLUSIVE)
1421 fmode |= O_EXCL;
1422again:
1423 nfsstats.rpccnt[NFSPROC_CREATE]++;
1424 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED +
1425 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1426 nfsm_fhtom(dvp, v3);
1427 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1428 if (v3) {
1429 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1430 if (fmode & O_EXCL) {
1431 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
1432 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF);
1433#ifdef INET
1434 if (!TAILQ_EMPTY(&in_ifaddrhead))
1435 *tl++ = IA_SIN(in_ifaddrhead.tqh_first)->sin_addr.s_addr;
1436 else
1437#endif
1438 *tl++ = create_verf;
1439 *tl = ++create_verf;
1440 } else {
1441 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
1442 nfsm_v3attrbuild(vap, FALSE);
1443 }
1444 } else {
1445 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1446 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1447 sp->sa_uid = nfs_xdrneg1;
1448 sp->sa_gid = nfs_xdrneg1;
1449 sp->sa_size = 0;
1450 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1451 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1452 }
dadab5e9 1453 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1454 if (!error) {
1455 nfsm_mtofh(dvp, newvp, v3, gotvp);
1456 if (!gotvp) {
1457 if (newvp) {
1458 vput(newvp);
1459 newvp = (struct vnode *)0;
1460 }
1461 error = nfs_lookitup(dvp, cnp->cn_nameptr,
dadab5e9 1462 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
984263bc
MD
1463 if (!error)
1464 newvp = NFSTOV(np);
1465 }
1466 }
1467 if (v3)
1468 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1469 m_freem(mrep);
1470nfsmout:
984263bc
MD
1471 if (error) {
1472 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
1473 fmode &= ~O_EXCL;
1474 goto again;
1475 }
1476 if (newvp)
1477 vput(newvp);
1478 } else if (v3 && (fmode & O_EXCL)) {
1479 /*
1480 * We are normally called with only a partially initialized
1481 * VAP. Since the NFSv3 spec says that server may use the
1482 * file attributes to store the verifier, the spec requires
1483 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1484 * in atime, but we can't really assume that all servers will
1485 * so we ensure that our SETATTR sets both atime and mtime.
1486 */
1487 if (vap->va_mtime.tv_sec == VNOVAL)
1488 vfs_timestamp(&vap->va_mtime);
1489 if (vap->va_atime.tv_sec == VNOVAL)
1490 vap->va_atime = vap->va_mtime;
dadab5e9 1491 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td);
984263bc
MD
1492 }
1493 if (!error) {
2b69e610 1494 if (cnp->cn_flags & CNP_MAKEENTRY)
bc0c094e 1495 cache_enter(dvp, NCPNULL, newvp, cnp);
c1cf1e59
MD
1496 /*
1497 * The new np may have enough info for access
1498 * checks, make sure rucred and wucred are
1499 * initialized for read and write rpc's.
1500 */
1501 np = VTONFS(newvp);
1502 if (np->n_rucred == NULL)
1503 np->n_rucred = crhold(cnp->cn_cred);
1504 if (np->n_wucred == NULL)
1505 np->n_wucred = crhold(cnp->cn_cred);
984263bc
MD
1506 *ap->a_vpp = newvp;
1507 }
1508 VTONFS(dvp)->n_flag |= NMODIFIED;
1509 if (!wccflag)
1510 VTONFS(dvp)->n_attrstamp = 0;
1511 return (error);
1512}
1513
1514/*
1515 * nfs file remove call
1516 * To try and make nfs semantics closer to ufs semantics, a file that has
1517 * other processes using the vnode is renamed instead of removed and then
1518 * removed later on the last close.
1519 * - If v_usecount > 1
1520 * If a rename is not already in the works
1521 * call nfs_sillyrename() to set it up
1522 * else
1523 * do the remove rpc
1524 */
1525static int
1526nfs_remove(ap)
1527 struct vop_remove_args /* {
1528 struct vnodeop_desc *a_desc;
1529 struct vnode * a_dvp;
1530 struct vnode * a_vp;
1531 struct componentname * a_cnp;
1532 } */ *ap;
1533{
40393ded
RG
1534 struct vnode *vp = ap->a_vp;
1535 struct vnode *dvp = ap->a_dvp;
1536 struct componentname *cnp = ap->a_cnp;
1537 struct nfsnode *np = VTONFS(vp);
984263bc
MD
1538 int error = 0;
1539 struct vattr vattr;
1540
1541#ifndef DIAGNOSTIC
2b69e610 1542 if ((cnp->cn_flags & CNP_HASBUF) == 0)
984263bc
MD
1543 panic("nfs_remove: no name");
1544 if (vp->v_usecount < 1)
1545 panic("nfs_remove: bad v_usecount");
1546#endif
1547 if (vp->v_type == VDIR)
1548 error = EPERM;
1549 else if (vp->v_usecount == 1 || (np->n_sillyrename &&
3b568787 1550 VOP_GETATTR(vp, &vattr, cnp->cn_td) == 0 &&
984263bc
MD
1551 vattr.va_nlink > 1)) {
1552 /*
1553 * Purge the name cache so that the chance of a lookup for
1554 * the name succeeding while the remove is in progress is
1555 * minimized. Without node locking it can still happen, such
1556 * that an I/O op returns ESTALE, but since you get this if
1557 * another host removes the file..
1558 */
1559 cache_purge(vp);
1560 /*
1561 * throw away biocache buffers, mainly to avoid
1562 * unnecessary delayed writes later.
1563 */
3b568787 1564 error = nfs_vinvalbuf(vp, 0, cnp->cn_td, 1);
984263bc
MD
1565 /* Do the rpc */
1566 if (error != EINTR)
1567 error = nfs_removerpc(dvp, cnp->cn_nameptr,
dadab5e9 1568 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td);
984263bc
MD
1569 /*
1570 * Kludge City: If the first reply to the remove rpc is lost..
1571 * the reply to the retransmitted request will be ENOENT
1572 * since the file was in fact removed
1573 * Therefore, we cheat and return success.
1574 */
1575 if (error == ENOENT)
1576 error = 0;
1577 } else if (!np->n_sillyrename)
1578 error = nfs_sillyrename(dvp, vp, cnp);
1579 np->n_attrstamp = 0;
1580 return (error);
1581}
1582
1583/*
1584 * nfs file remove rpc called from nfs_inactive
1585 */
1586int
dadab5e9 1587nfs_removeit(struct sillyrename *sp)
984263bc
MD
1588{
1589
dadab5e9
MD
1590 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen,
1591 sp->s_cred, NULL));
984263bc
MD
1592}
1593
1594/*
1595 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1596 */
1597static int
dadab5e9
MD
1598nfs_removerpc(dvp, name, namelen, cred, td)
1599 struct vnode *dvp;
984263bc
MD
1600 const char *name;
1601 int namelen;
1602 struct ucred *cred;
dadab5e9 1603 struct thread *td;
984263bc 1604{
40393ded
RG
1605 u_int32_t *tl;
1606 caddr_t cp;
1607 int32_t t1, t2;
984263bc
MD
1608 caddr_t bpos, dpos, cp2;
1609 int error = 0, wccflag = NFSV3_WCCRATTR;
1610 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1611 int v3 = NFS_ISV3(dvp);
1612
1613 nfsstats.rpccnt[NFSPROC_REMOVE]++;
1614 nfsm_reqhead(dvp, NFSPROC_REMOVE,
1615 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1616 nfsm_fhtom(dvp, v3);
1617 nfsm_strtom(name, namelen, NFS_MAXNAMLEN);
dadab5e9 1618 nfsm_request(dvp, NFSPROC_REMOVE, td, cred);
984263bc
MD
1619 if (v3)
1620 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1621 m_freem(mrep);
1622nfsmout:
984263bc
MD
1623 VTONFS(dvp)->n_flag |= NMODIFIED;
1624 if (!wccflag)
1625 VTONFS(dvp)->n_attrstamp = 0;
1626 return (error);
1627}
1628
1629/*
1630 * nfs file rename call
1631 */
1632static int
1633nfs_rename(ap)
1634 struct vop_rename_args /* {
1635 struct vnode *a_fdvp;
1636 struct vnode *a_fvp;
1637 struct componentname *a_fcnp;
1638 struct vnode *a_tdvp;
1639 struct vnode *a_tvp;
1640 struct componentname *a_tcnp;
1641 } */ *ap;
1642{
40393ded
RG
1643 struct vnode *fvp = ap->a_fvp;
1644 struct vnode *tvp = ap->a_tvp;
1645 struct vnode *fdvp = ap->a_fdvp;
1646 struct vnode *tdvp = ap->a_tdvp;
1647 struct componentname *tcnp = ap->a_tcnp;
1648 struct componentname *fcnp = ap->a_fcnp;
984263bc
MD
1649 int error;
1650
1651#ifndef DIAGNOSTIC
2b69e610
MD
1652 if ((tcnp->cn_flags & CNP_HASBUF) == 0 ||
1653 (fcnp->cn_flags & CNP_HASBUF) == 0)
984263bc
MD
1654 panic("nfs_rename: no name");
1655#endif
1656 /* Check for cross-device rename */
1657 if ((fvp->v_mount != tdvp->v_mount) ||
1658 (tvp && (fvp->v_mount != tvp->v_mount))) {
1659 error = EXDEV;
1660 goto out;
1661 }
1662
1663 /*
1664 * We have to flush B_DELWRI data prior to renaming
1665 * the file. If we don't, the delayed-write buffers
1666 * can be flushed out later after the file has gone stale
1667 * under NFSV3. NFSV2 does not have this problem because
1668 * ( as far as I can tell ) it flushes dirty buffers more
1669 * often.
1670 */
1671
3b568787 1672 VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_td);
984263bc 1673 if (tvp)
3b568787 1674 VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_td);
984263bc
MD
1675
1676 /*
1677 * If the tvp exists and is in use, sillyrename it before doing the
1678 * rename of the new file over it.
1679 * XXX Can't sillyrename a directory.
1680 */
1681 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename &&
1682 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1683 vput(tvp);
1684 tvp = NULL;
1685 }
1686
1687 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1688 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
dadab5e9 1689 tcnp->cn_td);
984263bc
MD
1690
1691 if (fvp->v_type == VDIR) {
1692 if (tvp != NULL && tvp->v_type == VDIR)
1693 cache_purge(tdvp);
1694 cache_purge(fdvp);
1695 }
1696
1697out:
1698 if (tdvp == tvp)
1699 vrele(tdvp);
1700 else
1701 vput(tdvp);
1702 if (tvp)
1703 vput(tvp);
1704 vrele(fdvp);
1705 vrele(fvp);
1706 /*
1707 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1708 */
1709 if (error == ENOENT)
1710 error = 0;
1711 return (error);
1712}
1713
1714/*
1715 * nfs file rename rpc called from nfs_remove() above
1716 */
1717static int
1718nfs_renameit(sdvp, scnp, sp)
1719 struct vnode *sdvp;
1720 struct componentname *scnp;
40393ded 1721 struct sillyrename *sp;
984263bc
MD
1722{
1723 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
dadab5e9 1724 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td));
984263bc
MD
1725}
1726
1727/*
1728 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1729 */
1730static int
dadab5e9
MD
1731nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, td)
1732 struct vnode *fdvp;
984263bc
MD
1733 const char *fnameptr;
1734 int fnamelen;
40393ded 1735 struct vnode *tdvp;
984263bc
MD
1736 const char *tnameptr;
1737 int tnamelen;
1738 struct ucred *cred;
dadab5e9 1739 struct thread *td;
984263bc 1740{
40393ded
RG
1741 u_int32_t *tl;
1742 caddr_t cp;
1743 int32_t t1, t2;
984263bc
MD
1744 caddr_t bpos, dpos, cp2;
1745 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
1746 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1747 int v3 = NFS_ISV3(fdvp);
1748
1749 nfsstats.rpccnt[NFSPROC_RENAME]++;
1750 nfsm_reqhead(fdvp, NFSPROC_RENAME,
1751 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) +
1752 nfsm_rndup(tnamelen));
1753 nfsm_fhtom(fdvp, v3);
1754 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN);
1755 nfsm_fhtom(tdvp, v3);
1756 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN);
dadab5e9 1757 nfsm_request(fdvp, NFSPROC_RENAME, td, cred);
984263bc
MD
1758 if (v3) {
1759 nfsm_wcc_data(fdvp, fwccflag);
1760 nfsm_wcc_data(tdvp, twccflag);
1761 }
6b08710e
MD
1762 m_freem(mrep);
1763nfsmout:
984263bc
MD
1764 VTONFS(fdvp)->n_flag |= NMODIFIED;
1765 VTONFS(tdvp)->n_flag |= NMODIFIED;
1766 if (!fwccflag)
1767 VTONFS(fdvp)->n_attrstamp = 0;
1768 if (!twccflag)
1769 VTONFS(tdvp)->n_attrstamp = 0;
1770 return (error);
1771}
1772
1773/*
1774 * nfs hard link create call
1775 */
1776static int
1777nfs_link(ap)
1778 struct vop_link_args /* {
1779 struct vnode *a_tdvp;
1780 struct vnode *a_vp;
1781 struct componentname *a_cnp;
1782 } */ *ap;
1783{
40393ded
RG
1784 struct vnode *vp = ap->a_vp;
1785 struct vnode *tdvp = ap->a_tdvp;
1786 struct componentname *cnp = ap->a_cnp;
1787 u_int32_t *tl;
1788 caddr_t cp;
1789 int32_t t1, t2;
984263bc
MD
1790 caddr_t bpos, dpos, cp2;
1791 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
1792 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1793 int v3;
1794
1795 if (vp->v_mount != tdvp->v_mount) {
1796 return (EXDEV);
1797 }
1798
1799 /*
1800 * Push all writes to the server, so that the attribute cache
1801 * doesn't get "out of sync" with the server.
1802 * XXX There should be a better way!
1803 */
3b568787 1804 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_td);
984263bc
MD
1805
1806 v3 = NFS_ISV3(vp);
1807 nfsstats.rpccnt[NFSPROC_LINK]++;
1808 nfsm_reqhead(vp, NFSPROC_LINK,
1809 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
1810 nfsm_fhtom(vp, v3);
1811 nfsm_fhtom(tdvp, v3);
1812 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
dadab5e9 1813 nfsm_request(vp, NFSPROC_LINK, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1814 if (v3) {
1815 nfsm_postop_attr(vp, attrflag);
1816 nfsm_wcc_data(tdvp, wccflag);
1817 }
6b08710e
MD
1818 m_freem(mrep);
1819nfsmout:
984263bc
MD
1820 VTONFS(tdvp)->n_flag |= NMODIFIED;
1821 if (!attrflag)
1822 VTONFS(vp)->n_attrstamp = 0;
1823 if (!wccflag)
1824 VTONFS(tdvp)->n_attrstamp = 0;
1825 /*
1826 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1827 */
1828 if (error == EEXIST)
1829 error = 0;
1830 return (error);
1831}
1832
1833/*
1834 * nfs symbolic link create call
1835 */
1836static int
1837nfs_symlink(ap)
1838 struct vop_symlink_args /* {
1839 struct vnode *a_dvp;
1840 struct vnode **a_vpp;
1841 struct componentname *a_cnp;
1842 struct vattr *a_vap;
1843 char *a_target;
1844 } */ *ap;
1845{
40393ded
RG
1846 struct vnode *dvp = ap->a_dvp;
1847 struct vattr *vap = ap->a_vap;
1848 struct componentname *cnp = ap->a_cnp;
1849 struct nfsv2_sattr *sp;
1850 u_int32_t *tl;
1851 caddr_t cp;
1852 int32_t t1, t2;
984263bc
MD
1853 caddr_t bpos, dpos, cp2;
1854 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
1855 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1856 struct vnode *newvp = (struct vnode *)0;
1857 int v3 = NFS_ISV3(dvp);
1858
1859 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1860 slen = strlen(ap->a_target);
1861 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED +
1862 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3));
1863 nfsm_fhtom(dvp, v3);
1864 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1865 if (v3) {
1866 nfsm_v3attrbuild(vap, FALSE);
1867 }
1868 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
1869 if (!v3) {
1870 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1871 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
1872 sp->sa_uid = nfs_xdrneg1;
1873 sp->sa_gid = nfs_xdrneg1;
1874 sp->sa_size = nfs_xdrneg1;
1875 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1876 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1877 }
1878
1879 /*
1880 * Issue the NFS request and get the rpc response.
1881 *
1882 * Only NFSv3 responses returning an error of 0 actually return
1883 * a file handle that can be converted into newvp without having
1884 * to do an extra lookup rpc.
1885 */
dadab5e9 1886 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1887 if (v3) {
1888 if (error == 0)
1889 nfsm_mtofh(dvp, newvp, v3, gotvp);
1890 nfsm_wcc_data(dvp, wccflag);
1891 }
1892
1893 /*
1894 * out code jumps -> here, mrep is also freed.
1895 */
1896
6b08710e
MD
1897 m_freem(mrep);
1898nfsmout:
984263bc
MD
1899
1900 /*
1901 * If we get an EEXIST error, silently convert it to no-error
1902 * in case of an NFS retry.
1903 */
1904 if (error == EEXIST)
1905 error = 0;
1906
1907 /*
1908 * If we do not have (or no longer have) an error, and we could
1909 * not extract the newvp from the response due to the request being
1910 * NFSv2 or the error being EEXIST. We have to do a lookup in order
1911 * to obtain a newvp to return.
1912 */
1913 if (error == 0 && newvp == NULL) {
1914 struct nfsnode *np = NULL;
1915
1916 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
dadab5e9 1917 cnp->cn_cred, cnp->cn_td, &np);
984263bc
MD
1918 if (!error)
1919 newvp = NFSTOV(np);
1920 }
1921 if (error) {
1922 if (newvp)
1923 vput(newvp);
1924 } else {
1925 *ap->a_vpp = newvp;
1926 }
1927 VTONFS(dvp)->n_flag |= NMODIFIED;
1928 if (!wccflag)
1929 VTONFS(dvp)->n_attrstamp = 0;
1930 return (error);
1931}
1932
1933/*
1934 * nfs make dir call
1935 */
1936static int
1937nfs_mkdir(ap)
1938 struct vop_mkdir_args /* {
1939 struct vnode *a_dvp;
1940 struct vnode **a_vpp;
1941 struct componentname *a_cnp;
1942 struct vattr *a_vap;
1943 } */ *ap;
1944{
40393ded
RG
1945 struct vnode *dvp = ap->a_dvp;
1946 struct vattr *vap = ap->a_vap;
1947 struct componentname *cnp = ap->a_cnp;
1948 struct nfsv2_sattr *sp;
1949 u_int32_t *tl;
1950 caddr_t cp;
1951 int32_t t1, t2;
1952 int len;
984263bc
MD
1953 struct nfsnode *np = (struct nfsnode *)0;
1954 struct vnode *newvp = (struct vnode *)0;
1955 caddr_t bpos, dpos, cp2;
1956 int error = 0, wccflag = NFSV3_WCCRATTR;
1957 int gotvp = 0;
1958 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1959 struct vattr vattr;
1960 int v3 = NFS_ISV3(dvp);
1961
3b568787 1962 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) {
984263bc
MD
1963 return (error);
1964 }
1965 len = cnp->cn_namelen;
1966 nfsstats.rpccnt[NFSPROC_MKDIR]++;
1967 nfsm_reqhead(dvp, NFSPROC_MKDIR,
1968 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3));
1969 nfsm_fhtom(dvp, v3);
1970 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
1971 if (v3) {
1972 nfsm_v3attrbuild(vap, FALSE);
1973 } else {
1974 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1975 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
1976 sp->sa_uid = nfs_xdrneg1;
1977 sp->sa_gid = nfs_xdrneg1;
1978 sp->sa_size = nfs_xdrneg1;
1979 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1980 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1981 }
dadab5e9 1982 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1983 if (!error)
1984 nfsm_mtofh(dvp, newvp, v3, gotvp);
1985 if (v3)
1986 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1987 m_freem(mrep);
1988nfsmout:
984263bc
MD
1989 VTONFS(dvp)->n_flag |= NMODIFIED;
1990 if (!wccflag)
1991 VTONFS(dvp)->n_attrstamp = 0;
1992 /*
1993 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
1994 * if we can succeed in looking up the directory.
1995 */
1996 if (error == EEXIST || (!error && !gotvp)) {
1997 if (newvp) {
1998 vrele(newvp);
1999 newvp = (struct vnode *)0;
2000 }
2001 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
dadab5e9 2002 cnp->cn_td, &np);
984263bc
MD
2003 if (!error) {
2004 newvp = NFSTOV(np);
2005 if (newvp->v_type != VDIR)
2006 error = EEXIST;
2007 }
2008 }
2009 if (error) {
2010 if (newvp)
2011 vrele(newvp);
2012 } else
2013 *ap->a_vpp = newvp;
2014 return (error);
2015}
2016
2017/*
2018 * nfs remove directory call
2019 */
2020static int
2021nfs_rmdir(ap)
2022 struct vop_rmdir_args /* {
2023 struct vnode *a_dvp;
2024 struct vnode *a_vp;
2025 struct componentname *a_cnp;
2026 } */ *ap;
2027{
40393ded
RG
2028 struct vnode *vp = ap->a_vp;
2029 struct vnode *dvp = ap->a_dvp;
2030 struct componentname *cnp = ap->a_cnp;
2031 u_int32_t *tl;
2032 caddr_t cp;
2033 int32_t t1, t2;
984263bc
MD
2034 caddr_t bpos, dpos, cp2;
2035 int error = 0, wccflag = NFSV3_WCCRATTR;
2036 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2037 int v3 = NFS_ISV3(dvp);
2038
2039 if (dvp == vp)
2040 return (EINVAL);
2041 nfsstats.rpccnt[NFSPROC_RMDIR]++;
2042 nfsm_reqhead(dvp, NFSPROC_RMDIR,
2043 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
2044 nfsm_fhtom(dvp, v3);
2045 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
dadab5e9 2046 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_td, cnp->cn_cred);
984263bc
MD
2047 if (v3)
2048 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
2049 m_freem(mrep);
2050nfsmout:
984263bc
MD
2051 VTONFS(dvp)->n_flag |= NMODIFIED;
2052 if (!wccflag)
2053 VTONFS(dvp)->n_attrstamp = 0;
2054 cache_purge(dvp);
2055 cache_purge(vp);
2056 /*
2057 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2058 */
2059 if (error == ENOENT)
2060 error = 0;
2061 return (error);
2062}
2063
2064/*
2065 * nfs readdir call
2066 */
2067static int
2068nfs_readdir(ap)
2069 struct vop_readdir_args /* {
2070 struct vnode *a_vp;
2071 struct uio *a_uio;
2072 struct ucred *a_cred;
2073 } */ *ap;
2074{
40393ded
RG
2075 struct vnode *vp = ap->a_vp;
2076 struct nfsnode *np = VTONFS(vp);
2077 struct uio *uio = ap->a_uio;
984263bc
MD
2078 int tresid, error;
2079 struct vattr vattr;
2080
2081 if (vp->v_type != VDIR)
2082 return (EPERM);
2083 /*
2084 * First, check for hit on the EOF offset cache
2085 */
2086 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2087 (np->n_flag & NMODIFIED) == 0) {
2088 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) {
2089 if (NQNFS_CKCACHABLE(vp, ND_READ)) {
2090 nfsstats.direofcache_hits++;
2091 return (0);
2092 }
3b568787 2093 } else if (VOP_GETATTR(vp, &vattr, uio->uio_td) == 0 &&
984263bc
MD
2094 np->n_mtime == vattr.va_mtime.tv_sec) {
2095 nfsstats.direofcache_hits++;
2096 return (0);
2097 }
2098 }
2099
2100 /*
2101 * Call nfs_bioread() to do the real work.
2102 */
2103 tresid = uio->uio_resid;
3b568787 2104 error = nfs_bioread(vp, uio, 0);
984263bc
MD
2105
2106 if (!error && uio->uio_resid == tresid)
2107 nfsstats.direofcache_misses++;
2108 return (error);
2109}
2110
2111/*
2112 * Readdir rpc call.
2113 * Called from below the buffer cache by nfs_doio().
2114 */
2115int
3b568787 2116nfs_readdirrpc(struct vnode *vp, struct uio *uiop)
984263bc 2117{
40393ded
RG
2118 int len, left;
2119 struct dirent *dp = NULL;
2120 u_int32_t *tl;
2121 caddr_t cp;
2122 int32_t t1, t2;
2123 nfsuint64 *cookiep;
984263bc
MD
2124 caddr_t bpos, dpos, cp2;
2125 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2126 nfsuint64 cookie;
2127 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2128 struct nfsnode *dnp = VTONFS(vp);
2129 u_quad_t fileno;
2130 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2131 int attrflag;
2132 int v3 = NFS_ISV3(vp);
2133
2134#ifndef DIAGNOSTIC
2135 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2136 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2137 panic("nfs readdirrpc bad uio");
2138#endif
2139
2140 /*
2141 * If there is no cookie, assume directory was stale.
2142 */
2143 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2144 if (cookiep)
2145 cookie = *cookiep;
2146 else
2147 return (NFSERR_BAD_COOKIE);
2148 /*
2149 * Loop around doing readdir rpc's of size nm_readdirsize
2150 * truncated to a multiple of DIRBLKSIZ.
2151 * The stopping criteria is EOF or buffer full.
2152 */
2153 while (more_dirs && bigenough) {
2154 nfsstats.rpccnt[NFSPROC_READDIR]++;
2155 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) +
2156 NFSX_READDIR(v3));
2157 nfsm_fhtom(vp, v3);
2158 if (v3) {
2159 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
2160 *tl++ = cookie.nfsuquad[0];
2161 *tl++ = cookie.nfsuquad[1];
2162 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2163 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2164 } else {
2165 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2166 *tl++ = cookie.nfsuquad[0];
2167 }
2168 *tl = txdr_unsigned(nmp->nm_readdirsize);
c1cf1e59 2169 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_td, nfs_vpcred(vp, ND_READ));
984263bc
MD
2170 if (v3) {
2171 nfsm_postop_attr(vp, attrflag);
2172 if (!error) {
2173 nfsm_dissect(tl, u_int32_t *,
2174 2 * NFSX_UNSIGNED);
2175 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2176 dnp->n_cookieverf.nfsuquad[1] = *tl;
2177 } else {
2178 m_freem(mrep);
2179 goto nfsmout;
2180 }
2181 }
2182 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2183 more_dirs = fxdr_unsigned(int, *tl);
2184
2185 /* loop thru the dir entries, doctoring them to 4bsd form */
2186 while (more_dirs && bigenough) {
2187 if (v3) {
2188 nfsm_dissect(tl, u_int32_t *,
2189 3 * NFSX_UNSIGNED);
2190 fileno = fxdr_hyper(tl);
2191 len = fxdr_unsigned(int, *(tl + 2));
2192 } else {
2193 nfsm_dissect(tl, u_int32_t *,
2194 2 * NFSX_UNSIGNED);
2195 fileno = fxdr_unsigned(u_quad_t, *tl++);
2196 len = fxdr_unsigned(int, *tl);
2197 }
2198 if (len <= 0 || len > NFS_MAXNAMLEN) {
2199 error = EBADRPC;
2200 m_freem(mrep);
2201 goto nfsmout;
2202 }
2203 tlen = nfsm_rndup(len);
2204 if (tlen == len)
2205 tlen += 4; /* To ensure null termination */
2206 left = DIRBLKSIZ - blksiz;
2207 if ((tlen + DIRHDSIZ) > left) {
2208 dp->d_reclen += left;
2209 uiop->uio_iov->iov_base += left;
2210 uiop->uio_iov->iov_len -= left;
2211 uiop->uio_offset += left;
2212 uiop->uio_resid -= left;
2213 blksiz = 0;
2214 }
2215 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2216 bigenough = 0;
2217 if (bigenough) {
2218 dp = (struct dirent *)uiop->uio_iov->iov_base;
2219 dp->d_fileno = (int)fileno;
2220 dp->d_namlen = len;
2221 dp->d_reclen = tlen + DIRHDSIZ;
2222 dp->d_type = DT_UNKNOWN;
2223 blksiz += dp->d_reclen;
2224 if (blksiz == DIRBLKSIZ)
2225 blksiz = 0;
2226 uiop->uio_offset += DIRHDSIZ;
2227 uiop->uio_resid -= DIRHDSIZ;
2228 uiop->uio_iov->iov_base += DIRHDSIZ;
2229 uiop->uio_iov->iov_len -= DIRHDSIZ;
2230 nfsm_mtouio(uiop, len);
2231 cp = uiop->uio_iov->iov_base;
2232 tlen -= len;
2233 *cp = '\0'; /* null terminate */
2234 uiop->uio_iov->iov_base += tlen;
2235 uiop->uio_iov->iov_len -= tlen;
2236 uiop->uio_offset += tlen;
2237 uiop->uio_resid -= tlen;
2238 } else
2239 nfsm_adv(nfsm_rndup(len));
2240 if (v3) {
2241 nfsm_dissect(tl, u_int32_t *,
2242 3 * NFSX_UNSIGNED);
2243 } else {
2244 nfsm_dissect(tl, u_int32_t *,
2245 2 * NFSX_UNSIGNED);
2246 }
2247 if (bigenough) {
2248 cookie.nfsuquad[0] = *tl++;
2249 if (v3)
2250 cookie.nfsuquad[1] = *tl++;
2251 } else if (v3)
2252 tl += 2;
2253 else
2254 tl++;
2255 more_dirs = fxdr_unsigned(int, *tl);
2256 }
2257 /*
2258 * If at end of rpc data, get the eof boolean
2259 */
2260 if (!more_dirs) {
2261 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2262 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2263 }
2264 m_freem(mrep);
2265 }
2266 /*
2267 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2268 * by increasing d_reclen for the last record.
2269 */
2270 if (blksiz > 0) {
2271 left = DIRBLKSIZ - blksiz;
2272 dp->d_reclen += left;
2273 uiop->uio_iov->iov_base += left;
2274 uiop->uio_iov->iov_len -= left;
2275 uiop->uio_offset += left;
2276 uiop->uio_resid -= left;
2277 }
2278
2279 /*
2280 * We are now either at the end of the directory or have filled the
2281 * block.
2282 */
2283 if (bigenough)
2284 dnp->n_direofoffset = uiop->uio_offset;
2285 else {
2286 if (uiop->uio_resid > 0)
2287 printf("EEK! readdirrpc resid > 0\n");
2288 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2289 *cookiep = cookie;
2290 }
2291nfsmout:
2292 return (error);
2293}
2294
2295/*
2296 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2297 */
2298int
3b568787 2299nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop)
984263bc 2300{
40393ded
RG
2301 int len, left;
2302 struct dirent *dp;
2303 u_int32_t *tl;
2304 caddr_t cp;
2305 int32_t t1, t2;
2306 struct vnode *newvp;
2307 nfsuint64 *cookiep;
984263bc
MD
2308 caddr_t bpos, dpos, cp2, dpossav1, dpossav2;
2309 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2;
2310 struct nameidata nami, *ndp = &nami;
2311 struct componentname *cnp = &ndp->ni_cnd;
2312 nfsuint64 cookie;
2313 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2314 struct nfsnode *dnp = VTONFS(vp), *np;
2315 nfsfh_t *fhp;
2316 u_quad_t fileno;
2317 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2318 int attrflag, fhsize;
2319
2320#ifndef nolint
2321 dp = (struct dirent *)0;
2322#endif
2323#ifndef DIAGNOSTIC
2324 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2325 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2326 panic("nfs readdirplusrpc bad uio");
2327#endif
2328 ndp->ni_dvp = vp;
2329 newvp = NULLVP;
2330
2331 /*
2332 * If there is no cookie, assume directory was stale.
2333 */
2334 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2335 if (cookiep)
2336 cookie = *cookiep;
2337 else
2338 return (NFSERR_BAD_COOKIE);
2339 /*
2340 * Loop around doing readdir rpc's of size nm_readdirsize
2341 * truncated to a multiple of DIRBLKSIZ.
2342 * The stopping criteria is EOF or buffer full.
2343 */
2344 while (more_dirs && bigenough) {
2345 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
2346 nfsm_reqhead(vp, NFSPROC_READDIRPLUS,
2347 NFSX_FH(1) + 6 * NFSX_UNSIGNED);
2348 nfsm_fhtom(vp, 1);
2349 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
2350 *tl++ = cookie.nfsuquad[0];
2351 *tl++ = cookie.nfsuquad[1];
2352 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2353 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2354 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2355 *tl = txdr_unsigned(nmp->nm_rsize);
c1cf1e59 2356 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_td, nfs_vpcred(vp, ND_READ));
984263bc
MD
2357 nfsm_postop_attr(vp, attrflag);
2358 if (error) {
2359 m_freem(mrep);
2360 goto nfsmout;
2361 }
2362 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2363 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2364 dnp->n_cookieverf.nfsuquad[1] = *tl++;
2365 more_dirs = fxdr_unsigned(int, *tl);
2366
2367 /* loop thru the dir entries, doctoring them to 4bsd form */
2368 while (more_dirs && bigenough) {
2369 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2370 fileno = fxdr_hyper(tl);
2371 len = fxdr_unsigned(int, *(tl + 2));
2372 if (len <= 0 || len > NFS_MAXNAMLEN) {
2373 error = EBADRPC;
2374 m_freem(mrep);
2375 goto nfsmout;
2376 }
2377 tlen = nfsm_rndup(len);
2378 if (tlen == len)
2379 tlen += 4; /* To ensure null termination*/
2380 left = DIRBLKSIZ - blksiz;
2381 if ((tlen + DIRHDSIZ) > left) {
2382 dp->d_reclen += left;
2383 uiop->uio_iov->iov_base += left;
2384 uiop->uio_iov->iov_len -= left;
2385 uiop->uio_offset += left;
2386 uiop->uio_resid -= left;
2387 blksiz = 0;
2388 }
2389 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2390 bigenough = 0;
2391 if (bigenough) {
2392 dp = (struct dirent *)uiop->uio_iov->iov_base;
2393 dp->d_fileno = (int)fileno;
2394 dp->d_namlen = len;
2395 dp->d_reclen = tlen + DIRHDSIZ;
2396 dp->d_type = DT_UNKNOWN;
2397 blksiz += dp->d_reclen;
2398 if (blksiz == DIRBLKSIZ)
2399 blksiz = 0;
2400 uiop->uio_offset += DIRHDSIZ;
2401 uiop->uio_resid -= DIRHDSIZ;
2402 uiop->uio_iov->iov_base += DIRHDSIZ;
2403 uiop->uio_iov->iov_len -= DIRHDSIZ;
2404 cnp->cn_nameptr = uiop->uio_iov->iov_base;
2405 cnp->cn_namelen = len;
2406 nfsm_mtouio(uiop, len);
2407 cp = uiop->uio_iov->iov_base;
2408 tlen -= len;
2409 *cp = '\0';
2410 uiop->uio_iov->iov_base += tlen;
2411 uiop->uio_iov->iov_len -= tlen;
2412 uiop->uio_offset += tlen;
2413 uiop->uio_resid -= tlen;
2414 } else
2415 nfsm_adv(nfsm_rndup(len));
2416 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2417 if (bigenough) {
2418 cookie.nfsuquad[0] = *tl++;
2419 cookie.nfsuquad[1] = *tl++;
2420 } else
2421 tl += 2;
2422
2423 /*
2424 * Since the attributes are before the file handle
2425 * (sigh), we must skip over the attributes and then
2426 * come back and get them.
2427 */
2428 attrflag = fxdr_unsigned(int, *tl);
2429 if (attrflag) {
2430 dpossav1 = dpos;
2431 mdsav1 = md;
2432 nfsm_adv(NFSX_V3FATTR);
2433 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2434 doit = fxdr_unsigned(int, *tl);
2435 if (doit) {
2436 nfsm_getfh(fhp, fhsize, 1);
2437 if (NFS_CMPFH(dnp, fhp, fhsize)) {
2438 VREF(vp);
2439 newvp = vp;
2440 np = dnp;
2441 } else {
2442 error = nfs_nget(vp->v_mount, fhp,
2443 fhsize, &np);
2444 if (error)
2445 doit = 0;
2446 else
2447 newvp = NFSTOV(np);
2448 }
2449 }
2450 if (doit && bigenough) {
2451 dpossav2 = dpos;
2452 dpos = dpossav1;
2453 mdsav2 = md;
2454 md = mdsav1;
2455 nfsm_loadattr(newvp, (struct vattr *)0);
2456 dpos = dpossav2;
2457 md = mdsav2;
2458 dp->d_type =
2459 IFTODT(VTTOIF(np->n_vattr.va_type));
2460 ndp->ni_vp = newvp;
bc0c094e 2461 cache_enter(ndp->ni_dvp, NCPNULL, ndp->ni_vp, cnp);
984263bc
MD
2462 }
2463 } else {
2464 /* Just skip over the file handle */
2465 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2466 i = fxdr_unsigned(int, *tl);
2467 nfsm_adv(nfsm_rndup(i));
2468 }
2469 if (newvp != NULLVP) {
2470 if (newvp == vp)
2471 vrele(newvp);
2472 else
2473 vput(newvp);
2474 newvp = NULLVP;
2475 }
2476 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2477 more_dirs = fxdr_unsigned(int, *tl);
2478 }
2479 /*
2480 * If at end of rpc data, get the eof boolean
2481 */
2482 if (!more_dirs) {
2483 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2484 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2485 }
2486 m_freem(mrep);
2487 }
2488 /*
2489 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2490 * by increasing d_reclen for the last record.
2491 */
2492 if (blksiz > 0) {
2493 left = DIRBLKSIZ - blksiz;
2494 dp->d_reclen += left;
2495 uiop->uio_iov->iov_base += left;
2496 uiop->uio_iov->iov_len -= left;
2497 uiop->uio_offset += left;
2498 uiop->uio_resid -= left;
2499 }
2500
2501 /*
2502 * We are now either at the end of the directory or have filled the
2503 * block.
2504 */
2505 if (bigenough)
2506 dnp->n_direofoffset = uiop->uio_offset;
2507 else {
2508 if (uiop->uio_resid > 0)
2509 printf("EEK! readdirplusrpc resid > 0\n");
2510 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2511 *cookiep = cookie;
2512 }
2513nfsmout:
2514 if (newvp != NULLVP) {
2515 if (newvp == vp)
2516 vrele(newvp);
2517 else
2518 vput(newvp);
2519 newvp = NULLVP;
2520 }
2521 return (error);
2522}
2523
2524/*
2525 * Silly rename. To make the NFS filesystem that is stateless look a little
2526 * more like the "ufs" a remove of an active vnode is translated to a rename
2527 * to a funny looking filename that is removed by nfs_inactive on the
2528 * nfsnode. There is the potential for another process on a different client
2529 * to create the same funny name between the nfs_lookitup() fails and the
2530 * nfs_rename() completes, but...
2531 */
2532static int
2533nfs_sillyrename(dvp, vp, cnp)
2534 struct vnode *dvp, *vp;
2535 struct componentname *cnp;
2536{
40393ded 2537 struct sillyrename *sp;
984263bc
MD
2538 struct nfsnode *np;
2539 int error;
984263bc
MD
2540
2541 cache_purge(dvp);
2542 np = VTONFS(vp);
2543#ifndef DIAGNOSTIC
2544 if (vp->v_type == VDIR)
2545 panic("nfs: sillyrename dir");
2546#endif
2547 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2548 M_NFSREQ, M_WAITOK);
2549 sp->s_cred = crdup(cnp->cn_cred);
2550 sp->s_dvp = dvp;
2551 VREF(dvp);
2552
2553 /* Fudge together a funny name */
dadab5e9 2554 sp->s_namlen = sprintf(sp->s_name, ".nfsA%08x4.4", (int)cnp->cn_td);
984263bc
MD
2555
2556 /* Try lookitups until we get one that isn't there */
2557 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
dadab5e9 2558 cnp->cn_td, (struct nfsnode **)0) == 0) {
984263bc
MD
2559 sp->s_name[4]++;
2560 if (sp->s_name[4] > 'z') {
2561 error = EINVAL;
2562 goto bad;
2563 }
2564 }
2565 error = nfs_renameit(dvp, cnp, sp);
2566 if (error)
2567 goto bad;
2568 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
dadab5e9 2569 cnp->cn_td, &np);
984263bc
MD
2570 np->n_sillyrename = sp;
2571 return (0);
2572bad:
2573 vrele(sp->s_dvp);
2574 crfree(sp->s_cred);
2575 free((caddr_t)sp, M_NFSREQ);
2576 return (error);
2577}
2578
2579/*
2580 * Look up a file name and optionally either update the file handle or
2581 * allocate an nfsnode, depending on the value of npp.
2582 * npp == NULL --> just do the lookup
2583 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2584 * handled too
2585 * *npp != NULL --> update the file handle in the vnode
2586 */
2587static int
dadab5e9 2588nfs_lookitup(dvp, name, len, cred, td, npp)
40393ded 2589 struct vnode *dvp;
984263bc
MD
2590 const char *name;
2591 int len;
2592 struct ucred *cred;
dadab5e9 2593 struct thread *td;
984263bc
MD
2594 struct nfsnode **npp;
2595{
40393ded
RG
2596 u_int32_t *tl;
2597 caddr_t cp;
2598 int32_t t1, t2;
984263bc
MD
2599 struct vnode *newvp = (struct vnode *)0;
2600 struct nfsnode *np, *dnp = VTONFS(dvp);
2601 caddr_t bpos, dpos, cp2;
2602 int error = 0, fhlen, attrflag;
2603 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2604 nfsfh_t *nfhp;
2605 int v3 = NFS_ISV3(dvp);
2606
2607 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
2608 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
2609 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2610 nfsm_fhtom(dvp, v3);
2611 nfsm_strtom(name, len, NFS_MAXNAMLEN);
dadab5e9 2612 nfsm_request(dvp, NFSPROC_LOOKUP, td, cred);
984263bc
MD
2613 if (npp && !error) {
2614 nfsm_getfh(nfhp, fhlen, v3);
2615 if (*npp) {
2616 np = *npp;
2617 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2618 free((caddr_t)np->n_fhp, M_NFSBIGFH);
2619 np->n_fhp = &np->n_fh;
2620 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2621 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK);
2622 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2623 np->n_fhsize = fhlen;
2624 newvp = NFSTOV(np);
2625 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
2626 VREF(dvp);
2627 newvp = dvp;
2628 } else {
2629 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
2630 if (error) {
2631 m_freem(mrep);
2632 return (error);
2633 }
2634 newvp = NFSTOV(np);
2635 }
2636 if (v3) {
2637 nfsm_postop_attr(newvp, attrflag);
2638 if (!attrflag && *npp == NULL) {
2639 m_freem(mrep);
2640 if (newvp == dvp)
2641 vrele(newvp);
2642 else
2643 vput(newvp);
2644 return (ENOENT);
2645 }
2646 } else
2647 nfsm_loadattr(newvp, (struct vattr *)0);
2648 }
6b08710e
MD
2649 m_freem(mrep);
2650nfsmout:
984263bc
MD
2651 if (npp && *npp == NULL) {
2652 if (error) {
2653 if (newvp) {
2654 if (newvp == dvp)
2655 vrele(newvp);
2656 else
2657 vput(newvp);
2658 }
2659 } else
2660 *npp = np;
2661 }
2662 return (error);
2663}
2664
2665/*
2666 * Nfs Version 3 commit rpc
2667 */
2668int
3b568787 2669nfs_commit(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td)
984263bc 2670{
40393ded
RG
2671 caddr_t cp;
2672 u_int32_t *tl;
2673 int32_t t1, t2;
2674 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
984263bc
MD
2675 caddr_t bpos, dpos, cp2;
2676 int error = 0, wccflag = NFSV3_WCCRATTR;
2677 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2678
2679 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
2680 return (0);
2681 nfsstats.rpccnt[NFSPROC_COMMIT]++;
2682 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1));
2683 nfsm_fhtom(vp, 1);
2684 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2685 txdr_hyper(offset, tl);
2686 tl += 2;
2687 *tl = txdr_unsigned(cnt);
c1cf1e59 2688 nfsm_request(vp, NFSPROC_COMMIT, td, nfs_vpcred(vp, ND_WRITE));
984263bc
MD
2689 nfsm_wcc_data(vp, wccflag);
2690 if (!error) {
2691 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF);
2692 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
2693 NFSX_V3WRITEVERF)) {
2694 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
2695 NFSX_V3WRITEVERF);
2696 error = NFSERR_STALEWRITEVERF;
2697 }
2698 }
6b08710e
MD
2699 m_freem(mrep);
2700nfsmout:
984263bc
MD
2701 return (error);
2702}
2703
2704/*
2705 * Kludge City..
2706 * - make nfs_bmap() essentially a no-op that does no translation
2707 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
2708 * (Maybe I could use the process's page mapping, but I was concerned that
2709 * Kernel Write might not be enabled and also figured copyout() would do
2710 * a lot more work than bcopy() and also it currently happens in the
2711 * context of the swapper process (2).
2712 */
2713static int
2714nfs_bmap(ap)
2715 struct vop_bmap_args /* {
2716 struct vnode *a_vp;
2717 daddr_t a_bn;
2718 struct vnode **a_vpp;
2719 daddr_t *a_bnp;
2720 int *a_runp;
2721 int *a_runb;
2722 } */ *ap;
2723{
40393ded 2724 struct vnode *vp = ap->a_vp;
984263bc
MD
2725
2726 if (ap->a_vpp != NULL)
2727 *ap->a_vpp = vp;
2728 if (ap->a_bnp != NULL)
2729 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize);
2730 if (ap->a_runp != NULL)
2731 *ap->a_runp = 0;
2732 if (ap->a_runb != NULL)
2733 *ap->a_runb = 0;
2734 return (0);
2735}
2736
2737/*
2738 * Strategy routine.
2739 * For async requests when nfsiod(s) are running, queue the request by
2740 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the
2741 * request.
2742 */
2743static int
2744nfs_strategy(ap)
2745 struct vop_strategy_args *ap;
2746{
40393ded 2747 struct buf *bp = ap->a_bp;
dadab5e9 2748 struct thread *td;
984263bc
MD
2749 int error = 0;
2750
2751 KASSERT(!(bp->b_flags & B_DONE), ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2752 KASSERT(BUF_REFCNT(bp) > 0, ("nfs_strategy: buffer %p not locked", bp));
2753
2754 if (bp->b_flags & B_PHYS)
2755 panic("nfs physio");
2756
2757 if (bp->b_flags & B_ASYNC)
dadab5e9 2758 td = NULL;
984263bc 2759 else
dadab5e9 2760 td = curthread; /* XXX */
984263bc 2761
984263bc
MD
2762 /*
2763 * If the op is asynchronous and an i/o daemon is waiting
2764 * queue the request, wake it up and wait for completion
2765 * otherwise just do it ourselves.
2766 */
2767 if ((bp->b_flags & B_ASYNC) == 0 ||
3b568787
MD
2768 nfs_asyncio(bp, td))
2769 error = nfs_doio(bp, td);
984263bc
MD
2770 return (error);
2771}
2772
2773/*
2774 * Mmap a file
2775 *
2776 * NB Currently unsupported.
2777 */
2778/* ARGSUSED */
2779static int
2780nfs_mmap(ap)
2781 struct vop_mmap_args /* {
2782 struct vnode *a_vp;
2783 int a_fflags;
2784 struct ucred *a_cred;
dadab5e9 2785 struct thread *a_td;
984263bc
MD
2786 } */ *ap;
2787{
2788
2789 return (EINVAL);
2790}
2791
2792/*
2793 * fsync vnode op. Just call nfs_flush() with commit == 1.
2794 */
2795/* ARGSUSED */
2796static int
2797nfs_fsync(ap)
2798 struct vop_fsync_args /* {
2799 struct vnodeop_desc *a_desc;
2800 struct vnode * a_vp;
2801 struct ucred * a_cred;
2802 int a_waitfor;
dadab5e9 2803 struct thread * a_td;
984263bc
MD
2804 } */ *ap;
2805{
2806
3b568787 2807 return (nfs_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1));
984263bc
MD
2808}
2809
2810/*
2811 * Flush all the blocks associated with a vnode.
2812 * Walk through the buffer pool and push any dirty pages
2813 * associated with the vnode.
2814 */
2815static int
3b568787 2816nfs_flush(vp, waitfor, td, commit)
40393ded 2817 struct vnode *vp;
984263bc 2818 int waitfor;
dadab5e9 2819 struct thread *td;
984263bc
MD
2820 int commit;
2821{
40393ded
RG
2822 struct nfsnode *np = VTONFS(vp);
2823 struct buf *bp;
2824 int i;
984263bc
MD
2825 struct buf *nbp;
2826 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2827 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2828 int passone = 1;
2829 u_quad_t off, endoff, toff;
984263bc
MD
2830 struct buf **bvec = NULL;
2831#ifndef NFS_COMMITBVECSIZ
2832#define NFS_COMMITBVECSIZ 20
2833#endif
2834 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2835 int bvecsize = 0, bveccount;
2836
2837 if (nmp->nm_flag & NFSMNT_INT)
2838 slpflag = PCATCH;
2839 if (!commit)
2840 passone = 0;
2841 /*
2842 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2843 * server, but nas not been committed to stable storage on the server
2844 * yet. On the first pass, the byte range is worked out and the commit
2845 * rpc is done. On the second pass, nfs_writebp() is called to do the
2846 * job.
2847 */
2848again:
2849 off = (u_quad_t)-1;
2850 endoff = 0;
2851 bvecpos = 0;
2852 if (NFS_ISV3(vp) && commit) {
2853 s = splbio();
2854 /*
2855 * Count up how many buffers waiting for a commit.
2856 */
2857 bveccount = 0;
2858 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2859 nbp = TAILQ_NEXT(bp, b_vnbufs);
2860 if (BUF_REFCNT(bp) == 0 &&
2861 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2862 == (B_DELWRI | B_NEEDCOMMIT))
2863 bveccount++;
2864 }
2865 /*
2866 * Allocate space to remember the list of bufs to commit. It is
2867 * important to use M_NOWAIT here to avoid a race with nfs_write.
2868 * If we can't get memory (for whatever reason), we will end up
2869 * committing the buffers one-by-one in the loop below.
2870 */
2871 if (bvec != NULL && bvec != bvec_on_stack)
2872 free(bvec, M_TEMP);
2873 if (bveccount > NFS_COMMITBVECSIZ) {
2874 bvec = (struct buf **)
2875 malloc(bveccount * sizeof(struct buf *),
2876 M_TEMP, M_NOWAIT);
2877 if (bvec == NULL) {
2878 bvec = bvec_on_stack;
2879 bvecsize = NFS_COMMITBVECSIZ;
2880 } else
2881 bvecsize = bveccount;
2882 } else {
2883 bvec = bvec_on_stack;
2884 bvecsize = NFS_COMMITBVECSIZ;
2885 }
2886 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2887 nbp = TAILQ_NEXT(bp, b_vnbufs);
2888 if (bvecpos >= bvecsize)
2889 break;
2890 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2891 (B_DELWRI | B_NEEDCOMMIT) ||
2892 BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
2893 continue;
2894 bremfree(bp);
2895 /*
984263bc
MD
2896 * NOTE: we are not clearing B_DONE here, so we have
2897 * to do it later on in this routine if we intend to
2898 * initiate I/O on the bp.
2899 *
2900 * Note: to avoid loopback deadlocks, we do not
2901 * assign b_runningbufspace.
2902 */
984263bc
MD
2903 bp->b_flags |= B_WRITEINPROG;
2904 vfs_busy_pages(bp, 1);
2905
2906 /*
2907 * bp is protected by being locked, but nbp is not
2908 * and vfs_busy_pages() may sleep. We have to
2909 * recalculate nbp.
2910 */
2911 nbp = TAILQ_NEXT(bp, b_vnbufs);
2912
2913 /*
2914 * A list of these buffers is kept so that the
2915 * second loop knows which buffers have actually
2916 * been committed. This is necessary, since there
2917 * may be a race between the commit rpc and new
2918 * uncommitted writes on the file.
2919 */
2920 bvec[bvecpos++] = bp;
2921 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2922 bp->b_dirtyoff;
2923 if (toff < off)
2924 off = toff;
2925 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2926 if (toff > endoff)
2927 endoff = toff;
2928 }
2929 splx(s);
2930 }
2931 if (bvecpos > 0) {
2932 /*
3b568787
MD
2933 * Commit data on the server, as required. Note that
2934 * nfs_commit will use the vnode's cred for the commit.
984263bc 2935 */
3b568787 2936 retv = nfs_commit(vp, off, (int)(endoff - off), td);
984263bc
MD
2937
2938 if (retv == NFSERR_STALEWRITEVERF)
2939 nfs_clearcommit(vp->v_mount);
2940
2941 /*
2942 * Now, either mark the blocks I/O done or mark the
2943 * blocks dirty, depending on whether the commit
2944 * succeeded.
2945 */
2946 for (i = 0; i < bvecpos; i++) {
2947 bp = bvec[i];
2948 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG | B_CLUSTEROK);
2949 if (retv) {
2950 /*
2951 * Error, leave B_DELWRI intact
2952 */
2953 vfs_unbusy_pages(bp);
2954 brelse(bp);
2955 } else {
2956 /*
2957 * Success, remove B_DELWRI ( bundirty() ).
2958 *
2959 * b_dirtyoff/b_dirtyend seem to be NFS
2960 * specific. We should probably move that
2961 * into bundirty(). XXX
2962 */
2963 s = splbio();
2964 vp->v_numoutput++;
2965 bp->b_flags |= B_ASYNC;
2966 bundirty(bp);
2967 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR);
2968 bp->b_dirtyoff = bp->b_dirtyend = 0;
2969 splx(s);
2970 biodone(bp);
2971 }
2972 }
2973 }
2974
2975 /*
2976 * Start/do any write(s) that are required.
2977 */
2978loop:
2979 s = splbio();
2980 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2981 nbp = TAILQ_NEXT(bp, b_vnbufs);
2982 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) {
2983 if (waitfor != MNT_WAIT || passone)
2984 continue;
2985 error = BUF_TIMELOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL,
2986 "nfsfsync", slpflag, slptimeo);
2987 splx(s);
2988 if (error == 0)
2989 panic("nfs_fsync: inconsistent lock");
2990 if (error == ENOLCK)
2991 goto loop;
dadab5e9 2992 if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) {
984263bc
MD
2993 error = EINTR;
2994 goto done;
2995 }
2996 if (slpflag == PCATCH) {
2997 slpflag = 0;
2998 slptimeo = 2 * hz;
2999 }
3000 goto loop;
3001 }
3002 if ((bp->b_flags & B_DELWRI) == 0)
3003 panic("nfs_fsync: not dirty");
3004 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
3005 BUF_UNLOCK(bp);
3006 continue;
3007 }
3008 bremfree(bp);
3009 if (passone || !commit)
3010 bp->b_flags |= B_ASYNC;
3011 else
3012 bp->b_flags |= B_ASYNC | B_WRITEINPROG;
3013 splx(s);
3014 VOP_BWRITE(bp->b_vp, bp);
3015 goto loop;
3016 }
3017 splx(s);
3018 if (passone) {
3019 passone = 0;
3020 goto again;
3021 }
3022 if (waitfor == MNT_WAIT) {
3023 while (vp->v_numoutput) {
3024 vp->v_flag |= VBWAIT;
3025 error = tsleep((caddr_t)&vp->v_numoutput,
377d4740 3026 slpflag, "nfsfsync", slptimeo);
984263bc 3027 if (error) {
dadab5e9 3028 if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) {
984263bc
MD
3029 error = EINTR;
3030 goto done;
3031 }
3032 if (slpflag == PCATCH) {
3033 slpflag = 0;
3034 slptimeo = 2 * hz;
3035 }
3036 }
3037 }
3038 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd) && commit) {
3039 goto loop;
3040 }
3041 }
3042 if (np->n_flag & NWRITEERR) {
3043 error = np->n_error;
3044 np->n_flag &= ~NWRITEERR;
3045 }
3046done:
3047 if (bvec != NULL && bvec != bvec_on_stack)
3048 free(bvec, M_TEMP);
3049 return (error);
3050}
3051
3052/*
3053 * NFS advisory byte-level locks.
3054 * Currently unsupported.
3055 */
3056static int
3057nfs_advlock(ap)
3058 struct vop_advlock_args /* {
3059 struct vnode *a_vp;
3060 caddr_t a_id;
3061 int a_op;
3062 struct flock *a_fl;
3063 int a_flags;
3064 } */ *ap;
3065{
40393ded 3066 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3067
3068 /*
3069 * The following kludge is to allow diskless support to work
3070 * until a real NFS lockd is implemented. Basically, just pretend
3071 * that this is a local lock.
3072 */
3073 return (lf_advlock(ap, &(np->n_lockf), np->n_size));
3074}
3075
3076/*
3077 * Print out the contents of an nfsnode.
3078 */
3079static int
3080nfs_print(ap)
3081 struct vop_print_args /* {
3082 struct vnode *a_vp;
3083 } */ *ap;
3084{
40393ded
RG
3085 struct vnode *vp = ap->a_vp;
3086 struct nfsnode *np = VTONFS(vp);
984263bc
MD
3087
3088 printf("tag VT_NFS, fileid %ld fsid 0x%x",
3089 np->n_vattr.va_fileid, np->n_vattr.va_fsid);
3090 if (vp->v_type == VFIFO)
3091 fifo_printinfo(vp);
3092 printf("\n");
3093 return (0);
3094}
3095
3096/*
3097 * Just call nfs_writebp() with the force argument set to 1.
3098 *
3099 * NOTE: B_DONE may or may not be set in a_bp on call.
3100 */
3101static int
3102nfs_bwrite(ap)
3103 struct vop_bwrite_args /* {
3104 struct vnode *a_bp;
3105 } */ *ap;
3106{
dadab5e9 3107 return (nfs_writebp(ap->a_bp, 1, curthread));
984263bc
MD
3108}
3109
3110/*
3111 * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless
3112 * the force flag is one and it also handles the B_NEEDCOMMIT flag. We set
3113 * B_CACHE if this is a VMIO buffer.
3114 */
3115int
dadab5e9 3116nfs_writebp(bp, force, td)
40393ded 3117 struct buf *bp;
984263bc 3118 int force;
dadab5e9 3119 struct thread *td;
984263bc
MD
3120{
3121 int s;
3122 int oldflags = bp->b_flags;
3123#if 0
3124 int retv = 1;
3125 off_t off;
3126#endif
3127
3128 if (BUF_REFCNT(bp) == 0)
3129 panic("bwrite: buffer is not locked???");
3130
3131 if (bp->b_flags & B_INVAL) {
3132 brelse(bp);
3133 return(0);
3134 }
3135
3136 bp->b_flags |= B_CACHE;
3137
3138 /*
3139 * Undirty the bp. We will redirty it later if the I/O fails.
3140 */
3141
3142 s = splbio();
3143 bundirty(bp);
3144 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR);
3145
3146 bp->b_vp->v_numoutput++;
984263bc
MD
3147 splx(s);
3148
3149 /*
3150 * Note: to avoid loopback deadlocks, we do not
3151 * assign b_runningbufspace.
3152 */
3153 vfs_busy_pages(bp, 1);
3154
3155 if (force)
3156 bp->b_flags |= B_WRITEINPROG;
3157 BUF_KERNPROC(bp);
3158 VOP_STRATEGY(bp->b_vp, bp);
3159
3160 if( (oldflags & B_ASYNC) == 0) {
3161 int rtval = biowait(bp);
3162
3163 if (oldflags & B_DELWRI) {
3164 s = splbio();
3165 reassignbuf(bp, bp->b_vp);
3166 splx(s);
3167 }
3168
3169 brelse(bp);
3170 return (rtval);
3171 }
3172
3173 return (0);
3174}
3175
3176/*
3177 * nfs special file access vnode op.
3178 * Essentially just get vattr and then imitate iaccess() since the device is
3179 * local to the client.
3180 */
3181static int
3182nfsspec_access(ap)
3183 struct vop_access_args /* {
3184 struct vnode *a_vp;
3185 int a_mode;
3186 struct ucred *a_cred;
dadab5e9 3187 struct thread *a_td;
984263bc
MD
3188 } */ *ap;
3189{
40393ded
RG
3190 struct vattr *vap;
3191 gid_t *gp;
3192 struct ucred *cred = ap->a_cred;
984263bc
MD
3193 struct vnode *vp = ap->a_vp;
3194 mode_t mode = ap->a_mode;
3195 struct vattr vattr;
40393ded 3196 int i;
984263bc
MD
3197 int error;
3198
3199 /*
3200 * Disallow write attempts on filesystems mounted read-only;
3201 * unless the file is a socket, fifo, or a block or character
3202 * device resident on the filesystem.
3203 */
3204 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3205 switch (vp->v_type) {
3206 case VREG:
3207 case VDIR:
3208 case VLNK:
3209 return (EROFS);
3210 default:
3211 break;
3212 }
3213 }
3214 /*
3215 * If you're the super-user,
3216 * you always get access.
3217 */
3218 if (cred->cr_uid == 0)
3219 return (0);
3220 vap = &vattr;
3b568787 3221 error = VOP_GETATTR(vp, vap, ap->a_td);
984263bc
MD
3222 if (error)
3223 return (error);
3224 /*
3225 * Access check is based on only one of owner, group, public.
3226 * If not owner, then check group. If not a member of the
3227 * group, then check public access.
3228 */
3229 if (cred->cr_uid != vap->va_uid) {
3230 mode >>= 3;
3231 gp = cred->cr_groups;
3232 for (i = 0; i < cred->cr_ngroups; i++, gp++)
3233 if (vap->va_gid == *gp)
3234 goto found;
3235 mode >>= 3;
3236found:
3237 ;
3238 }
3239 error = (vap->va_mode & mode) == mode ? 0 : EACCES;
3240 return (error);
3241}
3242
3243/*
3244 * Read wrapper for special devices.
3245 */
3246static int
3247nfsspec_read(ap)
3248 struct vop_read_args /* {
3249 struct vnode *a_vp;
3250 struct uio *a_uio;
3251 int a_ioflag;
3252 struct ucred *a_cred;
3253 } */ *ap;
3254{
40393ded 3255 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3256
3257 /*
3258 * Set access flag.
3259 */
3260 np->n_flag |= NACC;
3261 getnanotime(&np->n_atim);
3262 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap));
3263}
3264
3265/*
3266 * Write wrapper for special devices.
3267 */
3268static int
3269nfsspec_write(ap)
3270 struct vop_write_args /* {
3271 struct vnode *a_vp;
3272 struct uio *a_uio;
3273 int a_ioflag;
3274 struct ucred *a_cred;
3275 } */ *ap;
3276{
40393ded 3277 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3278
3279 /*
3280 * Set update flag.
3281 */
3282 np->n_flag |= NUPD;
3283 getnanotime(&np->n_mtim);
3284 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap));
3285}
3286
3287/*
3288 * Close wrapper for special devices.
3289 *
3290 * Update the times on the nfsnode then do device close.
3291 */
3292static int
3293nfsspec_close(ap)
3294 struct vop_close_args /* {
3295 struct vnode *a_vp;
3296 int a_fflag;
3297 struct ucred *a_cred;
dadab5e9 3298 struct thread *a_td;
984263bc
MD
3299 } */ *ap;
3300{
40393ded
RG
3301 struct vnode *vp = ap->a_vp;
3302 struct nfsnode *np = VTONFS(vp);
984263bc
MD
3303 struct vattr vattr;
3304
3305 if (np->n_flag & (NACC | NUPD)) {
3306 np->n_flag |= NCHG;
3307 if (vp->v_usecount == 1 &&
3308 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3309 VATTR_NULL(&vattr);
3310 if (np->n_flag & NACC)
3311 vattr.va_atime = np->n_atim;
3312 if (np->n_flag & NUPD)
3313 vattr.va_mtime = np->n_mtim;
c1cf1e59 3314 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE), ap->a_td);
984263bc
MD
3315 }
3316 }
3317 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap));
3318}
3319
3320/*
3321 * Read wrapper for fifos.
3322 */
3323static int
3324nfsfifo_read(ap)
3325 struct vop_read_args /* {
3326 struct vnode *a_vp;
3327 struct uio *a_uio;
3328 int a_ioflag;
3329 struct ucred *a_cred;
3330 } */ *ap;
3331{
40393ded 3332 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3333
3334 /*
3335 * Set access flag.
3336 */
3337 np->n_flag |= NACC;
3338 getnanotime(&np->n_atim);
3339 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap));
3340}
3341
3342/*
3343 * Write wrapper for fifos.
3344 */
3345static int
3346nfsfifo_write(ap)
3347 struct vop_write_args /* {
3348 struct vnode *a_vp;
3349 struct uio *a_uio;
3350 int a_ioflag;
3351 struct ucred *a_cred;
3352 } */ *ap;
3353{
40393ded 3354 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3355
3356 /*
3357 * Set update flag.
3358 */
3359 np->n_flag |= NUPD;
3360 getnanotime(&np->n_mtim);
3361 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap));
3362}
3363
3364/*
3365 * Close wrapper for fifos.
3366 *
3367 * Update the times on the nfsnode then do fifo close.
3368 */
3369static int
3370nfsfifo_close(ap)
3371 struct vop_close_args /* {
3372 struct vnode *a_vp;
3373 int a_fflag;
dadab5e9 3374 struct thread *a_td;
984263bc
MD
3375 } */ *ap;
3376{
40393ded
RG
3377 struct vnode *vp = ap->a_vp;
3378 struct nfsnode *np = VTONFS(vp);
984263bc
MD
3379 struct vattr vattr;
3380 struct timespec ts;
3381
3382 if (np->n_flag & (NACC | NUPD)) {
3383 getnanotime(&ts);
3384 if (np->n_flag & NACC)
3385 np->n_atim = ts;
3386 if (np->n_flag & NUPD)
3387 np->n_mtim = ts;
3388 np->n_flag |= NCHG;
3389 if (vp->v_usecount == 1 &&
3390 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3391 VATTR_NULL(&vattr);
3392 if (np->n_flag & NACC)
3393 vattr.va_atime = np->n_atim;
3394 if (np->n_flag & NUPD)
3395 vattr.va_mtime = np->n_mtim;
c1cf1e59 3396 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE), ap->a_td);
984263bc
MD
3397 }
3398 }
3399 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap));
3400}
3401