Use MPIPE instead of misusing m_getclr() (i.e. m_get) for NETNS's
[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 $
8d429613 38 * $DragonFly: src/sys/vfs/nfs/nfs_vnops.c,v 1.23 2004/05/08 04:11:48 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
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263static int nfsneg_cache_timeout = NFS_MINATTRTIMO;
264SYSCTL_INT(_vfs_nfs, OID_AUTO, neg_cache_timeout, CTLFLAG_RW,
265 &nfsneg_cache_timeout, 0, "NFS NEGATIVE ACCESS cache timeout");
266
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267static int nfsv3_commit_on_close = 0;
268SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
269 &nfsv3_commit_on_close, 0, "write+commit on close, else only write");
270#if 0
271SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
272 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
273
274SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
275 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
276#endif
277
278#define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \
279 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \
280 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP)
281static int
dadab5e9 282nfs3_access_otw(struct vnode *vp, int wmode,
e851b29e 283 struct thread *td, struct ucred *cred)
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284{
285 const int v3 = 1;
286 u_int32_t *tl;
287 int error = 0, attrflag;
288
289 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
290 caddr_t bpos, dpos, cp2;
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291 int32_t t1, t2;
292 caddr_t cp;
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293 u_int32_t rmode;
294 struct nfsnode *np = VTONFS(vp);
295
296 nfsstats.rpccnt[NFSPROC_ACCESS]++;
297 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED);
298 nfsm_fhtom(vp, v3);
299 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
300 *tl = txdr_unsigned(wmode);
dadab5e9 301 nfsm_request(vp, NFSPROC_ACCESS, td, cred);
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302 nfsm_postop_attr(vp, attrflag);
303 if (!error) {
304 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
305 rmode = fxdr_unsigned(u_int32_t, *tl);
306 np->n_mode = rmode;
307 np->n_modeuid = cred->cr_uid;
3a6f9faf 308 np->n_modestamp = mycpu->gd_time_seconds;
984263bc 309 }
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310 m_freem(mrep);
311nfsmout:
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312 return error;
313}
314
315/*
316 * nfs access vnode op.
317 * For nfs version 2, just return ok. File accesses may fail later.
318 * For nfs version 3, use the access rpc to check accessibility. If file modes
319 * are changed on the server, accesses might still fail later.
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320 *
321 * nfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
322 * struct thread *a_td)
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323 */
324static int
e851b29e 325nfs_access(struct vop_access_args *ap)
984263bc 326{
40393ded 327 struct vnode *vp = ap->a_vp;
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328 int error = 0;
329 u_int32_t mode, wmode;
330 int v3 = NFS_ISV3(vp);
331 struct nfsnode *np = VTONFS(vp);
332
333 /*
334 * Disallow write attempts on filesystems mounted read-only;
335 * unless the file is a socket, fifo, or a block or character
336 * device resident on the filesystem.
337 */
338 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
339 switch (vp->v_type) {
340 case VREG:
341 case VDIR:
342 case VLNK:
343 return (EROFS);
344 default:
345 break;
346 }
347 }
348 /*
349 * For nfs v3, check to see if we have done this recently, and if
350 * so return our cached result instead of making an ACCESS call.
351 * If not, do an access rpc, otherwise you are stuck emulating
352 * ufs_access() locally using the vattr. This may not be correct,
353 * since the server may apply other access criteria such as
354 * client uid-->server uid mapping that we do not know about.
355 */
356 if (v3) {
357 if (ap->a_mode & VREAD)
358 mode = NFSV3ACCESS_READ;
359 else
360 mode = 0;
361 if (vp->v_type != VDIR) {
362 if (ap->a_mode & VWRITE)
363 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
364 if (ap->a_mode & VEXEC)
365 mode |= NFSV3ACCESS_EXECUTE;
366 } else {
367 if (ap->a_mode & VWRITE)
368 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
369 NFSV3ACCESS_DELETE);
370 if (ap->a_mode & VEXEC)
371 mode |= NFSV3ACCESS_LOOKUP;
372 }
373 /* XXX safety belt, only make blanket request if caching */
374 if (nfsaccess_cache_timeout > 0) {
375 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY |
376 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE |
377 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP;
378 } else {
379 wmode = mode;
380 }
381
382 /*
383 * Does our cached result allow us to give a definite yes to
384 * this request?
385 */
3a6f9faf 386 if ((mycpu->gd_time_seconds < (np->n_modestamp + nfsaccess_cache_timeout)) &&
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387 (ap->a_cred->cr_uid == np->n_modeuid) &&
388 ((np->n_mode & mode) == mode)) {
389 nfsstats.accesscache_hits++;
390 } else {
391 /*
392 * Either a no, or a don't know. Go to the wire.
393 */
394 nfsstats.accesscache_misses++;
dadab5e9 395 error = nfs3_access_otw(vp, wmode, ap->a_td,ap->a_cred);
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396 if (!error) {
397 if ((np->n_mode & mode) != mode) {
398 error = EACCES;
399 }
400 }
401 }
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402 } else {
403 if ((error = nfsspec_access(ap)) != 0)
404 return (error);
405
406 /*
407 * Attempt to prevent a mapped root from accessing a file
408 * which it shouldn't. We try to read a byte from the file
409 * if the user is root and the file is not zero length.
410 * After calling nfsspec_access, we should have the correct
411 * file size cached.
412 */
413 if (ap->a_cred->cr_uid == 0 && (ap->a_mode & VREAD)
414 && VTONFS(vp)->n_size > 0) {
415 struct iovec aiov;
416 struct uio auio;
417 char buf[1];
418
419 aiov.iov_base = buf;
420 aiov.iov_len = 1;
421 auio.uio_iov = &aiov;
422 auio.uio_iovcnt = 1;
423 auio.uio_offset = 0;
424 auio.uio_resid = 1;
425 auio.uio_segflg = UIO_SYSSPACE;
426 auio.uio_rw = UIO_READ;
dadab5e9 427 auio.uio_td = ap->a_td;
984263bc 428
c1cf1e59 429 if (vp->v_type == VREG) {
3b568787 430 error = nfs_readrpc(vp, &auio);
c1cf1e59 431 } else if (vp->v_type == VDIR) {
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432 char* bp;
433 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
434 aiov.iov_base = bp;
435 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
3b568787 436 error = nfs_readdirrpc(vp, &auio);
984263bc 437 free(bp, M_TEMP);
c1cf1e59 438 } else if (vp->v_type == VLNK) {
3b568787 439 error = nfs_readlinkrpc(vp, &auio);
c1cf1e59 440 } else {
984263bc 441 error = EACCES;
c1cf1e59 442 }
984263bc 443 }
984263bc 444 }
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445 /*
446 * [re]record creds for reading and/or writing if access
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447 * was granted. Assume the NFS server will grant read access
448 * for execute requests.
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449 */
450 if (error == 0) {
09b1ee9b 451 if ((ap->a_mode & (VREAD|VEXEC)) && ap->a_cred != np->n_rucred) {
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452 crhold(ap->a_cred);
453 if (np->n_rucred)
454 crfree(np->n_rucred);
455 np->n_rucred = ap->a_cred;
456 }
457 if ((ap->a_mode & VWRITE) && ap->a_cred != np->n_wucred) {
458 crhold(ap->a_cred);
459 if (np->n_wucred)
460 crfree(np->n_wucred);
461 np->n_wucred = ap->a_cred;
462 }
463 }
464 return(error);
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465}
466
467/*
468 * nfs open vnode op
469 * Check to see if the type is ok
470 * and that deletion is not in progress.
471 * For paged in text files, you will need to flush the page cache
472 * if consistency is lost.
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473 *
474 * nfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
475 * struct thread *a_td)
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476 */
477/* ARGSUSED */
478static int
e851b29e 479nfs_open(struct vop_open_args *ap)
984263bc 480{
40393ded 481 struct vnode *vp = ap->a_vp;
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482 struct nfsnode *np = VTONFS(vp);
483 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
484 struct vattr vattr;
485 int error;
486
487 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
488#ifdef DIAGNOSTIC
489 printf("open eacces vtyp=%d\n",vp->v_type);
490#endif
ca3a2b2f 491 return (EOPNOTSUPP);
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492 }
493 /*
494 * Get a valid lease. If cached data is stale, flush it.
495 */
496 if (nmp->nm_flag & NFSMNT_NQNFS) {
497 if (NQNFS_CKINVALID(vp, np, ND_READ)) {
498 do {
3b568787 499 error = nqnfs_getlease(vp, ND_READ, ap->a_td);
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500 } while (error == NQNFS_EXPIRED);
501 if (error)
502 return (error);
503 if (np->n_lrev != np->n_brev ||
504 (np->n_flag & NQNFSNONCACHE)) {
3b568787
MD
505 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1))
506 == EINTR) {
984263bc 507 return (error);
3b568787 508 }
984263bc
MD
509 np->n_brev = np->n_lrev;
510 }
511 }
512 } else {
513 if (np->n_flag & NMODIFIED) {
3b568787
MD
514 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1))
515 == EINTR) {
984263bc 516 return (error);
3b568787 517 }
984263bc
MD
518 np->n_attrstamp = 0;
519 if (vp->v_type == VDIR)
520 np->n_direofoffset = 0;
3b568787 521 error = VOP_GETATTR(vp, &vattr, ap->a_td);
984263bc
MD
522 if (error)
523 return (error);
524 np->n_mtime = vattr.va_mtime.tv_sec;
525 } else {
3b568787 526 error = VOP_GETATTR(vp, &vattr, ap->a_td);
984263bc
MD
527 if (error)
528 return (error);
529 if (np->n_mtime != vattr.va_mtime.tv_sec) {
530 if (vp->v_type == VDIR)
531 np->n_direofoffset = 0;
532 if ((error = nfs_vinvalbuf(vp, V_SAVE,
3b568787 533 ap->a_td, 1)) == EINTR) {
984263bc 534 return (error);
3b568787 535 }
984263bc
MD
536 np->n_mtime = vattr.va_mtime.tv_sec;
537 }
538 }
539 }
540 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0)
541 np->n_attrstamp = 0; /* For Open/Close consistency */
542 return (0);
543}
544
545/*
546 * nfs close vnode op
547 * What an NFS client should do upon close after writing is a debatable issue.
548 * Most NFS clients push delayed writes to the server upon close, basically for
549 * two reasons:
550 * 1 - So that any write errors may be reported back to the client process
551 * doing the close system call. By far the two most likely errors are
552 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
553 * 2 - To put a worst case upper bound on cache inconsistency between
554 * multiple clients for the file.
555 * There is also a consistency problem for Version 2 of the protocol w.r.t.
556 * not being able to tell if other clients are writing a file concurrently,
557 * since there is no way of knowing if the changed modify time in the reply
558 * is only due to the write for this client.
559 * (NFS Version 3 provides weak cache consistency data in the reply that
560 * should be sufficient to detect and handle this case.)
561 *
562 * The current code does the following:
563 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
564 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
565 * or commit them (this satisfies 1 and 2 except for the
566 * case where the server crashes after this close but
567 * before the commit RPC, which is felt to be "good
568 * enough". Changing the last argument to nfs_flush() to
569 * a 1 would force a commit operation, if it is felt a
570 * commit is necessary now.
571 * for NQNFS - do nothing now, since 2 is dealt with via leases and
572 * 1 should be dealt with via an fsync() system call for
573 * cases where write errors are important.
e851b29e
CP
574 *
575 * nfs_close(struct vnodeop_desc *a_desc, struct vnode *a_vp, int a_fflag,
576 * struct ucred *a_cred, struct thread *a_td)
984263bc
MD
577 */
578/* ARGSUSED */
579static int
e851b29e 580nfs_close(struct vop_close_args *ap)
984263bc 581{
40393ded
RG
582 struct vnode *vp = ap->a_vp;
583 struct nfsnode *np = VTONFS(vp);
984263bc
MD
584 int error = 0;
585
586 if (vp->v_type == VREG) {
587 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 &&
588 (np->n_flag & NMODIFIED)) {
589 if (NFS_ISV3(vp)) {
590 /*
591 * Under NFSv3 we have dirty buffers to dispose of. We
592 * must flush them to the NFS server. We have the option
593 * of waiting all the way through the commit rpc or just
594 * waiting for the initial write. The default is to only
595 * wait through the initial write so the data is in the
596 * server's cache, which is roughly similar to the state
597 * a standard disk subsystem leaves the file in on close().
598 *
599 * We cannot clear the NMODIFIED bit in np->n_flag due to
600 * potential races with other processes, and certainly
601 * cannot clear it if we don't commit.
602 */
603 int cm = nfsv3_commit_on_close ? 1 : 0;
3b568787 604 error = nfs_flush(vp, MNT_WAIT, ap->a_td, cm);
984263bc
MD
605 /* np->n_flag &= ~NMODIFIED; */
606 } else {
3b568787 607 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
984263bc
MD
608 }
609 np->n_attrstamp = 0;
610 }
611 if (np->n_flag & NWRITEERR) {
612 np->n_flag &= ~NWRITEERR;
613 error = np->n_error;
614 }
615 }
616 return (error);
617}
618
619/*
620 * nfs getattr call from vfs.
e851b29e
CP
621 *
622 * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred,
623 * struct thread *a_td)
984263bc
MD
624 */
625static int
e851b29e 626nfs_getattr(struct vop_getattr_args *ap)
984263bc 627{
40393ded
RG
628 struct vnode *vp = ap->a_vp;
629 struct nfsnode *np = VTONFS(vp);
630 caddr_t cp;
631 u_int32_t *tl;
632 int32_t t1, t2;
984263bc
MD
633 caddr_t bpos, dpos;
634 int error = 0;
635 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
636 int v3 = NFS_ISV3(vp);
637
638 /*
639 * Update local times for special files.
640 */
641 if (np->n_flag & (NACC | NUPD))
642 np->n_flag |= NCHG;
643 /*
644 * First look in the cache.
645 */
646 if (nfs_getattrcache(vp, ap->a_vap) == 0)
647 return (0);
648
649 if (v3 && nfsaccess_cache_timeout > 0) {
650 nfsstats.accesscache_misses++;
c1cf1e59 651 nfs3_access_otw(vp, NFSV3ACCESS_ALL, ap->a_td, nfs_vpcred(vp, ND_CHECK));
984263bc
MD
652 if (nfs_getattrcache(vp, ap->a_vap) == 0)
653 return (0);
654 }
655
656 nfsstats.rpccnt[NFSPROC_GETATTR]++;
657 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3));
658 nfsm_fhtom(vp, v3);
c1cf1e59 659 nfsm_request(vp, NFSPROC_GETATTR, ap->a_td, nfs_vpcred(vp, ND_CHECK));
984263bc
MD
660 if (!error) {
661 nfsm_loadattr(vp, ap->a_vap);
662 }
6b08710e
MD
663 m_freem(mrep);
664nfsmout:
984263bc
MD
665 return (error);
666}
667
668/*
669 * nfs setattr call.
e851b29e
CP
670 *
671 * nfs_setattr(struct vnodeop_desc *a_desc, struct vnode *a_vp,
672 * struct vattr *a_vap, struct ucred *a_cred,
673 * struct thread *a_td)
984263bc
MD
674 */
675static int
e851b29e 676nfs_setattr(struct vop_setattr_args *ap)
984263bc 677{
40393ded
RG
678 struct vnode *vp = ap->a_vp;
679 struct nfsnode *np = VTONFS(vp);
680 struct vattr *vap = ap->a_vap;
984263bc
MD
681 int error = 0;
682 u_quad_t tsize;
683
684#ifndef nolint
685 tsize = (u_quad_t)0;
686#endif
687
688 /*
689 * Setting of flags is not supported.
690 */
691 if (vap->va_flags != VNOVAL)
692 return (EOPNOTSUPP);
693
694 /*
695 * Disallow write attempts if the filesystem is mounted read-only.
696 */
697 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
698 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
699 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
700 (vp->v_mount->mnt_flag & MNT_RDONLY))
701 return (EROFS);
702 if (vap->va_size != VNOVAL) {
703 switch (vp->v_type) {
704 case VDIR:
705 return (EISDIR);
706 case VCHR:
707 case VBLK:
708 case VSOCK:
709 case VFIFO:
710 if (vap->va_mtime.tv_sec == VNOVAL &&
711 vap->va_atime.tv_sec == VNOVAL &&
712 vap->va_mode == (mode_t)VNOVAL &&
713 vap->va_uid == (uid_t)VNOVAL &&
714 vap->va_gid == (gid_t)VNOVAL)
715 return (0);
716 vap->va_size = VNOVAL;
717 break;
718 default:
719 /*
720 * Disallow write attempts if the filesystem is
721 * mounted read-only.
722 */
723 if (vp->v_mount->mnt_flag & MNT_RDONLY)
724 return (EROFS);
725
726 /*
727 * We run vnode_pager_setsize() early (why?),
728 * we must set np->n_size now to avoid vinvalbuf
729 * V_SAVE races that might setsize a lower
730 * value.
731 */
732
733 tsize = np->n_size;
3b568787 734 error = nfs_meta_setsize(vp, ap->a_td, vap->va_size);
984263bc
MD
735
736 if (np->n_flag & NMODIFIED) {
737 if (vap->va_size == 0)
3b568787 738 error = nfs_vinvalbuf(vp, 0, ap->a_td, 1);
984263bc 739 else
3b568787 740 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
984263bc
MD
741 if (error) {
742 np->n_size = tsize;
743 vnode_pager_setsize(vp, np->n_size);
744 return (error);
745 }
746 }
8d429613
MD
747 /*
748 * np->n_size has already been set to vap->va_size
b07fc55c
DR
749 * in nfs_meta_setsize(). We must set it again since
750 * nfs_loadattrcache() could be called through
751 * nfs_meta_setsize() and could modify np->n_size.
8d429613
MD
752 *
753 * (note that nfs_loadattrcache() will have called
754 * vnode_pager_setsize() for us in that case).
b07fc55c
DR
755 */
756 np->n_vattr.va_size = np->n_size = vap->va_size;
757 };
984263bc
MD
758 } else if ((vap->va_mtime.tv_sec != VNOVAL ||
759 vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) &&
760 vp->v_type == VREG &&
3b568787 761 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1)) == EINTR)
984263bc 762 return (error);
dadab5e9 763 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_td);
984263bc
MD
764 if (error && vap->va_size != VNOVAL) {
765 np->n_size = np->n_vattr.va_size = tsize;
766 vnode_pager_setsize(vp, np->n_size);
767 }
768 return (error);
769}
770
771/*
772 * Do an nfs setattr rpc.
773 */
774static int
dadab5e9 775nfs_setattrrpc(struct vnode *vp, struct vattr *vap,
e851b29e 776 struct ucred *cred, struct thread *td)
984263bc 777{
40393ded
RG
778 struct nfsv2_sattr *sp;
779 caddr_t cp;
780 int32_t t1, t2;
984263bc
MD
781 caddr_t bpos, dpos, cp2;
782 u_int32_t *tl;
783 int error = 0, wccflag = NFSV3_WCCRATTR;
784 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
785 int v3 = NFS_ISV3(vp);
786
787 nfsstats.rpccnt[NFSPROC_SETATTR]++;
788 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3));
789 nfsm_fhtom(vp, v3);
790 if (v3) {
791 nfsm_v3attrbuild(vap, TRUE);
792 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
793 *tl = nfs_false;
794 } else {
795 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
796 if (vap->va_mode == (mode_t)VNOVAL)
797 sp->sa_mode = nfs_xdrneg1;
798 else
799 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
800 if (vap->va_uid == (uid_t)VNOVAL)
801 sp->sa_uid = nfs_xdrneg1;
802 else
803 sp->sa_uid = txdr_unsigned(vap->va_uid);
804 if (vap->va_gid == (gid_t)VNOVAL)
805 sp->sa_gid = nfs_xdrneg1;
806 else
807 sp->sa_gid = txdr_unsigned(vap->va_gid);
808 sp->sa_size = txdr_unsigned(vap->va_size);
809 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
810 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
811 }
dadab5e9 812 nfsm_request(vp, NFSPROC_SETATTR, td, cred);
984263bc
MD
813 if (v3) {
814 nfsm_wcc_data(vp, wccflag);
815 } else
816 nfsm_loadattr(vp, (struct vattr *)0);
6b08710e
MD
817 m_freem(mrep);
818nfsmout:
984263bc
MD
819 return (error);
820}
821
822/*
4d17b298 823 * 'cached' nfs directory lookup
e851b29e
CP
824 *
825 * nfs_lookup(struct vnodeop_desc *a_desc, struct vnode *a_dvp,
826 * struct vnode **a_vpp, struct componentname *a_cnp)
984263bc
MD
827 */
828static int
e851b29e 829nfs_lookup(struct vop_lookup_args *ap)
984263bc
MD
830{
831 struct componentname *cnp = ap->a_cnp;
832 struct vnode *dvp = ap->a_dvp;
833 struct vnode **vpp = ap->a_vpp;
834 int flags = cnp->cn_flags;
835 struct vnode *newvp;
836 u_int32_t *tl;
837 caddr_t cp;
838 int32_t t1, t2;
839 struct nfsmount *nmp;
840 caddr_t bpos, dpos, cp2;
841 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
842 long len;
843 nfsfh_t *fhp;
844 struct nfsnode *np;
845 int lockparent, wantparent, error = 0, attrflag, fhsize;
846 int v3 = NFS_ISV3(dvp);
dadab5e9 847 struct thread *td = cnp->cn_td;
984263bc 848
4d17b298
MD
849 /*
850 * Read-only mount check and directory check.
851 */
984263bc 852 *vpp = NULLVP;
2b69e610
MD
853 if ((flags & CNP_ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
854 (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME))
984263bc 855 return (EROFS);
4d17b298 856
984263bc
MD
857 if (dvp->v_type != VDIR)
858 return (ENOTDIR);
4d17b298
MD
859
860 /*
861 * Look it up in the cache. Note that ENOENT is only returned if we
862 * previously entered a negative hit (see later on). The additional
863 * nfsneg_cache_timeout check causes previously cached results to
864 * be instantly ignored if the negative caching is turned off.
865 */
2b69e610
MD
866 lockparent = flags & CNP_LOCKPARENT;
867 wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT);
984263bc
MD
868 nmp = VFSTONFS(dvp->v_mount);
869 np = VTONFS(dvp);
4d17b298
MD
870 error = cache_lookup(dvp, NCPNULL, vpp, NCPPNULL, cnp);
871 if (error != 0) {
984263bc
MD
872 struct vattr vattr;
873 int vpid;
874
4d17b298
MD
875 if (error == ENOENT && nfsneg_cache_timeout) {
876 *vpp = NULLVP;
877 return (error);
878 }
dadab5e9 879 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0) {
984263bc
MD
880 *vpp = NULLVP;
881 return (error);
882 }
883
884 newvp = *vpp;
885 vpid = newvp->v_id;
886 /*
887 * See the comment starting `Step through' in ufs/ufs_lookup.c
888 * for an explanation of the locking protocol
889 */
890 if (dvp == newvp) {
597aea93 891 vref(newvp);
984263bc 892 error = 0;
2b69e610 893 } else if (flags & CNP_ISDOTDOT) {
41a01a4d
MD
894 VOP_UNLOCK(dvp, NULL, 0, td);
895 error = vget(newvp, NULL, LK_EXCLUSIVE, td);
2b69e610 896 if (!error && lockparent && (flags & CNP_ISLASTCN))
41a01a4d 897 error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td);
984263bc 898 } else {
41a01a4d 899 error = vget(newvp, NULL, LK_EXCLUSIVE, td);
2b69e610 900 if (!lockparent || error || !(flags & CNP_ISLASTCN))
41a01a4d 901 VOP_UNLOCK(dvp, NULL, 0, td);
984263bc
MD
902 }
903 if (!error) {
904 if (vpid == newvp->v_id) {
3b568787 905 if (!VOP_GETATTR(newvp, &vattr, td)
984263bc
MD
906 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) {
907 nfsstats.lookupcache_hits++;
2b69e610
MD
908 if (cnp->cn_nameiop != NAMEI_LOOKUP &&
909 (flags & CNP_ISLASTCN))
910 cnp->cn_flags |= CNP_SAVENAME;
984263bc
MD
911 return (0);
912 }
913 cache_purge(newvp);
914 }
915 vput(newvp);
2b69e610 916 if (lockparent && dvp != newvp && (flags & CNP_ISLASTCN))
41a01a4d 917 VOP_UNLOCK(dvp, NULL, 0, td);
984263bc 918 }
41a01a4d 919 error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td);
984263bc
MD
920 *vpp = NULLVP;
921 if (error)
922 return (error);
923 }
4d17b298
MD
924
925 /*
926 * Cache miss, go the wire.
927 */
984263bc
MD
928 error = 0;
929 newvp = NULLVP;
930 nfsstats.lookupcache_misses++;
931 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
932 len = cnp->cn_namelen;
933 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
934 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
935 nfsm_fhtom(dvp, v3);
936 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
dadab5e9 937 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_td, cnp->cn_cred);
984263bc 938 if (error) {
4d17b298
MD
939 /*
940 * Cache negatve lookups to reduce NFS traffic, but use
941 * a fast timeout.
942 */
943 if (error == ENOENT &&
944 (cnp->cn_flags & CNP_MAKEENTRY) &&
945 cnp->cn_nameiop == NAMEI_LOOKUP &&
946 nfsneg_cache_timeout) {
947 int toval = nfsneg_cache_timeout * hz;
948 if (cnp->cn_flags & CNP_CACHETIMEOUT) {
949 if (cnp->cn_timeout > toval)
950 cnp->cn_timeout = toval;
951 } else {
952 cnp->cn_flags |= CNP_CACHETIMEOUT;
953 cnp->cn_timeout = toval;
954 }
955 cache_enter(dvp, NCPNULL, NULL, cnp);
956 }
984263bc
MD
957 nfsm_postop_attr(dvp, attrflag);
958 m_freem(mrep);
959 goto nfsmout;
960 }
961 nfsm_getfh(fhp, fhsize, v3);
962
963 /*
964 * Handle RENAME case...
965 */
2b69e610 966 if (cnp->cn_nameiop == NAMEI_RENAME && wantparent && (flags & CNP_ISLASTCN)) {
984263bc
MD
967 if (NFS_CMPFH(np, fhp, fhsize)) {
968 m_freem(mrep);
969 return (EISDIR);
970 }
971 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
972 if (error) {
973 m_freem(mrep);
974 return (error);
975 }
976 newvp = NFSTOV(np);
977 if (v3) {
978 nfsm_postop_attr(newvp, attrflag);
979 nfsm_postop_attr(dvp, attrflag);
980 } else
981 nfsm_loadattr(newvp, (struct vattr *)0);
982 *vpp = newvp;
983 m_freem(mrep);
2b69e610 984 cnp->cn_flags |= CNP_SAVENAME;
984263bc 985 if (!lockparent)
41a01a4d 986 VOP_UNLOCK(dvp, NULL, 0, td);
984263bc
MD
987 return (0);
988 }
989
2b69e610 990 if (flags & CNP_ISDOTDOT) {
41a01a4d 991 VOP_UNLOCK(dvp, NULL, 0, td);
984263bc
MD
992 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
993 if (error) {
41a01a4d 994 vn_lock(dvp, NULL, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
995 return (error);
996 }
997 newvp = NFSTOV(np);
2b69e610 998 if (lockparent && (flags & CNP_ISLASTCN) &&
41a01a4d 999 (error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td))) {
984263bc
MD
1000 vput(newvp);
1001 return (error);
1002 }
1003 } else if (NFS_CMPFH(np, fhp, fhsize)) {
597aea93 1004 vref(dvp);
984263bc
MD
1005 newvp = dvp;
1006 } else {
1007 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1008 if (error) {
1009 m_freem(mrep);
1010 return (error);
1011 }
2b69e610 1012 if (!lockparent || !(flags & CNP_ISLASTCN))
41a01a4d 1013 VOP_UNLOCK(dvp, NULL, 0, td);
984263bc
MD
1014 newvp = NFSTOV(np);
1015 }
1016 if (v3) {
1017 nfsm_postop_attr(newvp, attrflag);
1018 nfsm_postop_attr(dvp, attrflag);
1019 } else
1020 nfsm_loadattr(newvp, (struct vattr *)0);
2b69e610
MD
1021 if (cnp->cn_nameiop != NAMEI_LOOKUP && (flags & CNP_ISLASTCN))
1022 cnp->cn_flags |= CNP_SAVENAME;
1023 if ((cnp->cn_flags & CNP_MAKEENTRY) &&
1024 (cnp->cn_nameiop != NAMEI_DELETE || !(flags & CNP_ISLASTCN))) {
984263bc 1025 np->n_ctime = np->n_vattr.va_ctime.tv_sec;
bc0c094e 1026 cache_enter(dvp, NCPNULL, newvp, cnp);
984263bc
MD
1027 }
1028 *vpp = newvp;
6b08710e
MD
1029 m_freem(mrep);
1030nfsmout:
984263bc
MD
1031 if (error) {
1032 if (newvp != NULLVP) {
1033 vrele(newvp);
1034 *vpp = NULLVP;
1035 }
2b69e610
MD
1036 if ((cnp->cn_nameiop == NAMEI_CREATE || cnp->cn_nameiop == NAMEI_RENAME) &&
1037 (flags & CNP_ISLASTCN) && error == ENOENT) {
984263bc 1038 if (!lockparent)
41a01a4d 1039 VOP_UNLOCK(dvp, NULL, 0, td);
984263bc
MD
1040 if (dvp->v_mount->mnt_flag & MNT_RDONLY)
1041 error = EROFS;
1042 else
1043 error = EJUSTRETURN;
1044 }
2b69e610
MD
1045 if (cnp->cn_nameiop != NAMEI_LOOKUP && (flags & CNP_ISLASTCN))
1046 cnp->cn_flags |= CNP_SAVENAME;
984263bc
MD
1047 }
1048 return (error);
1049}
1050
1051/*
1052 * nfs read call.
1053 * Just call nfs_bioread() to do the work.
e851b29e
CP
1054 *
1055 * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1056 * struct ucred *a_cred)
984263bc
MD
1057 */
1058static int
e851b29e 1059nfs_read(struct vop_read_args *ap)
984263bc 1060{
40393ded 1061 struct vnode *vp = ap->a_vp;
984263bc 1062
3b568787 1063 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
ca3a2b2f
HP
1064 switch (vp->v_type) {
1065 case VREG:
1066 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
1067 case VDIR:
1068 return (EISDIR);
1069 default:
1070 return EOPNOTSUPP;
1071 }
984263bc
MD
1072}
1073
1074/*
1075 * nfs readlink call
e851b29e
CP
1076 *
1077 * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
984263bc
MD
1078 */
1079static int
e851b29e 1080nfs_readlink(struct vop_readlink_args *ap)
984263bc 1081{
40393ded 1082 struct vnode *vp = ap->a_vp;
984263bc
MD
1083
1084 if (vp->v_type != VLNK)
1085 return (EINVAL);
3b568787 1086 return (nfs_bioread(vp, ap->a_uio, 0));
984263bc
MD
1087}
1088
1089/*
1090 * Do a readlink rpc.
1091 * Called by nfs_doio() from below the buffer cache.
1092 */
1093int
3b568787 1094nfs_readlinkrpc(struct vnode *vp, struct uio *uiop)
984263bc 1095{
40393ded
RG
1096 u_int32_t *tl;
1097 caddr_t cp;
1098 int32_t t1, t2;
984263bc
MD
1099 caddr_t bpos, dpos, cp2;
1100 int error = 0, len, attrflag;
1101 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1102 int v3 = NFS_ISV3(vp);
1103
1104 nfsstats.rpccnt[NFSPROC_READLINK]++;
1105 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3));
1106 nfsm_fhtom(vp, v3);
c1cf1e59 1107 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_td, nfs_vpcred(vp, ND_CHECK));
984263bc
MD
1108 if (v3)
1109 nfsm_postop_attr(vp, attrflag);
1110 if (!error) {
1111 nfsm_strsiz(len, NFS_MAXPATHLEN);
1112 if (len == NFS_MAXPATHLEN) {
1113 struct nfsnode *np = VTONFS(vp);
1114 if (np->n_size && np->n_size < NFS_MAXPATHLEN)
1115 len = np->n_size;
1116 }
1117 nfsm_mtouio(uiop, len);
1118 }
6b08710e
MD
1119 m_freem(mrep);
1120nfsmout:
984263bc
MD
1121 return (error);
1122}
1123
1124/*
1125 * nfs read rpc call
1126 * Ditto above
1127 */
1128int
3b568787 1129nfs_readrpc(struct vnode *vp, struct uio *uiop)
984263bc 1130{
40393ded
RG
1131 u_int32_t *tl;
1132 caddr_t cp;
1133 int32_t t1, t2;
984263bc
MD
1134 caddr_t bpos, dpos, cp2;
1135 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1136 struct nfsmount *nmp;
1137 int error = 0, len, retlen, tsiz, eof, attrflag;
1138 int v3 = NFS_ISV3(vp);
1139
1140#ifndef nolint
1141 eof = 0;
1142#endif
1143 nmp = VFSTONFS(vp->v_mount);
1144 tsiz = uiop->uio_resid;
1145 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1146 return (EFBIG);
1147 while (tsiz > 0) {
1148 nfsstats.rpccnt[NFSPROC_READ]++;
1149 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
1150 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3);
1151 nfsm_fhtom(vp, v3);
1152 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3);
1153 if (v3) {
1154 txdr_hyper(uiop->uio_offset, tl);
1155 *(tl + 2) = txdr_unsigned(len);
1156 } else {
1157 *tl++ = txdr_unsigned(uiop->uio_offset);
1158 *tl++ = txdr_unsigned(len);
1159 *tl = 0;
1160 }
c1cf1e59 1161 nfsm_request(vp, NFSPROC_READ, uiop->uio_td, nfs_vpcred(vp, ND_READ));
984263bc
MD
1162 if (v3) {
1163 nfsm_postop_attr(vp, attrflag);
1164 if (error) {
1165 m_freem(mrep);
1166 goto nfsmout;
1167 }
1168 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1169 eof = fxdr_unsigned(int, *(tl + 1));
1170 } else
1171 nfsm_loadattr(vp, (struct vattr *)0);
1172 nfsm_strsiz(retlen, nmp->nm_rsize);
1173 nfsm_mtouio(uiop, retlen);
1174 m_freem(mrep);
1175 tsiz -= retlen;
1176 if (v3) {
1177 if (eof || retlen == 0) {
1178 tsiz = 0;
1179 }
1180 } else if (retlen < len) {
1181 tsiz = 0;
1182 }
1183 }
1184nfsmout:
1185 return (error);
1186}
1187
1188/*
1189 * nfs write call
1190 */
1191int
e851b29e 1192nfs_writerpc(struct vnode *vp, struct uio *uiop, int *iomode, int *must_commit)
984263bc 1193{
40393ded
RG
1194 u_int32_t *tl;
1195 caddr_t cp;
1196 int32_t t1, t2, backup;
984263bc
MD
1197 caddr_t bpos, dpos, cp2;
1198 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1199 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1200 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
1201 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC;
1202
1203#ifndef DIAGNOSTIC
1204 if (uiop->uio_iovcnt != 1)
1205 panic("nfs: writerpc iovcnt > 1");
1206#endif
1207 *must_commit = 0;
1208 tsiz = uiop->uio_resid;
1209 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1210 return (EFBIG);
1211 while (tsiz > 0) {
1212 nfsstats.rpccnt[NFSPROC_WRITE]++;
1213 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1214 nfsm_reqhead(vp, NFSPROC_WRITE,
1215 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len));
1216 nfsm_fhtom(vp, v3);
1217 if (v3) {
1218 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
1219 txdr_hyper(uiop->uio_offset, tl);
1220 tl += 2;
1221 *tl++ = txdr_unsigned(len);
1222 *tl++ = txdr_unsigned(*iomode);
1223 *tl = txdr_unsigned(len);
1224 } else {
40393ded 1225 u_int32_t x;
984263bc
MD
1226
1227 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1228 /* Set both "begin" and "current" to non-garbage. */
1229 x = txdr_unsigned((u_int32_t)uiop->uio_offset);
1230 *tl++ = x; /* "begin offset" */
1231 *tl++ = x; /* "current offset" */
1232 x = txdr_unsigned(len);
1233 *tl++ = x; /* total to this offset */
1234 *tl = x; /* size of this write */
1235 }
1236 nfsm_uiotom(uiop, len);
c1cf1e59 1237 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_td, nfs_vpcred(vp, ND_WRITE));
984263bc
MD
1238 if (v3) {
1239 wccflag = NFSV3_WCCCHK;
1240 nfsm_wcc_data(vp, wccflag);
1241 if (!error) {
1242 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
1243 + NFSX_V3WRITEVERF);
1244 rlen = fxdr_unsigned(int, *tl++);
1245 if (rlen == 0) {
1246 error = NFSERR_IO;
1247 m_freem(mrep);
1248 break;
1249 } else if (rlen < len) {
1250 backup = len - rlen;
1251 uiop->uio_iov->iov_base -= backup;
1252 uiop->uio_iov->iov_len += backup;
1253 uiop->uio_offset -= backup;
1254 uiop->uio_resid += backup;
1255 len = rlen;
1256 }
1257 commit = fxdr_unsigned(int, *tl++);
1258
1259 /*
1260 * Return the lowest committment level
1261 * obtained by any of the RPCs.
1262 */
1263 if (committed == NFSV3WRITE_FILESYNC)
1264 committed = commit;
1265 else if (committed == NFSV3WRITE_DATASYNC &&
1266 commit == NFSV3WRITE_UNSTABLE)
1267 committed = commit;
1268 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){
1269 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1270 NFSX_V3WRITEVERF);
1271 nmp->nm_state |= NFSSTA_HASWRITEVERF;
1272 } else if (bcmp((caddr_t)tl,
1273 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1274 *must_commit = 1;
1275 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1276 NFSX_V3WRITEVERF);
1277 }
1278 }
1279 } else
1280 nfsm_loadattr(vp, (struct vattr *)0);
1281 if (wccflag)
1282 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec;
1283 m_freem(mrep);
1284 if (error)
1285 break;
1286 tsiz -= len;
1287 }
1288nfsmout:
1289 if (vp->v_mount->mnt_flag & MNT_ASYNC)
1290 committed = NFSV3WRITE_FILESYNC;
1291 *iomode = committed;
1292 if (error)
1293 uiop->uio_resid = tsiz;
1294 return (error);
1295}
1296
1297/*
1298 * nfs mknod rpc
1299 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1300 * mode set to specify the file type and the size field for rdev.
1301 */
1302static int
e851b29e
CP
1303nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1304 struct vattr *vap)
984263bc 1305{
40393ded
RG
1306 struct nfsv2_sattr *sp;
1307 u_int32_t *tl;
1308 caddr_t cp;
1309 int32_t t1, t2;
984263bc
MD
1310 struct vnode *newvp = (struct vnode *)0;
1311 struct nfsnode *np = (struct nfsnode *)0;
1312 struct vattr vattr;
1313 char *cp2;
1314 caddr_t bpos, dpos;
1315 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
1316 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1317 u_int32_t rdev;
1318 int v3 = NFS_ISV3(dvp);
1319
1320 if (vap->va_type == VCHR || vap->va_type == VBLK)
1321 rdev = txdr_unsigned(vap->va_rdev);
1322 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1323 rdev = nfs_xdrneg1;
1324 else {
1325 return (EOPNOTSUPP);
1326 }
3b568787 1327 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) {
984263bc
MD
1328 return (error);
1329 }
1330 nfsstats.rpccnt[NFSPROC_MKNOD]++;
1331 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED +
1332 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1333 nfsm_fhtom(dvp, v3);
1334 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1335 if (v3) {
1336 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1337 *tl++ = vtonfsv3_type(vap->va_type);
1338 nfsm_v3attrbuild(vap, FALSE);
1339 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1340 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1341 *tl++ = txdr_unsigned(umajor(vap->va_rdev));
1342 *tl = txdr_unsigned(uminor(vap->va_rdev));
1343 }
1344 } else {
1345 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1346 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1347 sp->sa_uid = nfs_xdrneg1;
1348 sp->sa_gid = nfs_xdrneg1;
1349 sp->sa_size = rdev;
1350 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1351 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1352 }
dadab5e9 1353 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1354 if (!error) {
1355 nfsm_mtofh(dvp, newvp, v3, gotvp);
1356 if (!gotvp) {
1357 if (newvp) {
1358 vput(newvp);
1359 newvp = (struct vnode *)0;
1360 }
1361 error = nfs_lookitup(dvp, cnp->cn_nameptr,
dadab5e9 1362 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
984263bc
MD
1363 if (!error)
1364 newvp = NFSTOV(np);
1365 }
1366 }
1367 if (v3)
1368 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1369 m_freem(mrep);
1370nfsmout:
984263bc
MD
1371 if (error) {
1372 if (newvp)
1373 vput(newvp);
1374 } else {
2b69e610 1375 if (cnp->cn_flags & CNP_MAKEENTRY)
bc0c094e 1376 cache_enter(dvp, NCPNULL, newvp, cnp);
984263bc
MD
1377 *vpp = newvp;
1378 }
1379 VTONFS(dvp)->n_flag |= NMODIFIED;
1380 if (!wccflag)
1381 VTONFS(dvp)->n_attrstamp = 0;
1382 return (error);
1383}
1384
1385/*
1386 * nfs mknod vop
1387 * just call nfs_mknodrpc() to do the work.
e851b29e
CP
1388 *
1389 * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
1390 * struct componentname *a_cnp, struct vattr *a_vap)
984263bc
MD
1391 */
1392/* ARGSUSED */
1393static int
e851b29e 1394nfs_mknod(struct vop_mknod_args *ap)
984263bc
MD
1395{
1396 return nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1397}
1398
1399static u_long create_verf;
1400/*
1401 * nfs file create call
e851b29e
CP
1402 *
1403 * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
1404 * struct componentname *a_cnp, struct vattr *a_vap)
984263bc
MD
1405 */
1406static int
e851b29e 1407nfs_create(struct vop_create_args *ap)
984263bc 1408{
40393ded
RG
1409 struct vnode *dvp = ap->a_dvp;
1410 struct vattr *vap = ap->a_vap;
1411 struct componentname *cnp = ap->a_cnp;
1412 struct nfsv2_sattr *sp;
1413 u_int32_t *tl;
1414 caddr_t cp;
1415 int32_t t1, t2;
984263bc
MD
1416 struct nfsnode *np = (struct nfsnode *)0;
1417 struct vnode *newvp = (struct vnode *)0;
1418 caddr_t bpos, dpos, cp2;
1419 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
1420 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1421 struct vattr vattr;
1422 int v3 = NFS_ISV3(dvp);
1423
1424 /*
1425 * Oops, not for me..
1426 */
1427 if (vap->va_type == VSOCK)
1428 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1429
3b568787 1430 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) {
984263bc
MD
1431 return (error);
1432 }
1433 if (vap->va_vaflags & VA_EXCLUSIVE)
1434 fmode |= O_EXCL;
1435again:
1436 nfsstats.rpccnt[NFSPROC_CREATE]++;
1437 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED +
1438 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1439 nfsm_fhtom(dvp, v3);
1440 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1441 if (v3) {
1442 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1443 if (fmode & O_EXCL) {
1444 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
1445 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF);
1446#ifdef INET
1447 if (!TAILQ_EMPTY(&in_ifaddrhead))
1448 *tl++ = IA_SIN(in_ifaddrhead.tqh_first)->sin_addr.s_addr;
1449 else
1450#endif
1451 *tl++ = create_verf;
1452 *tl = ++create_verf;
1453 } else {
1454 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
1455 nfsm_v3attrbuild(vap, FALSE);
1456 }
1457 } else {
1458 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1459 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1460 sp->sa_uid = nfs_xdrneg1;
1461 sp->sa_gid = nfs_xdrneg1;
1462 sp->sa_size = 0;
1463 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1464 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1465 }
dadab5e9 1466 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1467 if (!error) {
1468 nfsm_mtofh(dvp, newvp, v3, gotvp);
1469 if (!gotvp) {
1470 if (newvp) {
1471 vput(newvp);
1472 newvp = (struct vnode *)0;
1473 }
1474 error = nfs_lookitup(dvp, cnp->cn_nameptr,
dadab5e9 1475 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
984263bc
MD
1476 if (!error)
1477 newvp = NFSTOV(np);
1478 }
1479 }
1480 if (v3)
1481 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1482 m_freem(mrep);
1483nfsmout:
984263bc
MD
1484 if (error) {
1485 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
1486 fmode &= ~O_EXCL;
1487 goto again;
1488 }
1489 if (newvp)
1490 vput(newvp);
1491 } else if (v3 && (fmode & O_EXCL)) {
1492 /*
1493 * We are normally called with only a partially initialized
1494 * VAP. Since the NFSv3 spec says that server may use the
1495 * file attributes to store the verifier, the spec requires
1496 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1497 * in atime, but we can't really assume that all servers will
1498 * so we ensure that our SETATTR sets both atime and mtime.
1499 */
1500 if (vap->va_mtime.tv_sec == VNOVAL)
1501 vfs_timestamp(&vap->va_mtime);
1502 if (vap->va_atime.tv_sec == VNOVAL)
1503 vap->va_atime = vap->va_mtime;
dadab5e9 1504 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td);
984263bc
MD
1505 }
1506 if (!error) {
2b69e610 1507 if (cnp->cn_flags & CNP_MAKEENTRY)
bc0c094e 1508 cache_enter(dvp, NCPNULL, newvp, cnp);
c1cf1e59
MD
1509 /*
1510 * The new np may have enough info for access
1511 * checks, make sure rucred and wucred are
1512 * initialized for read and write rpc's.
1513 */
1514 np = VTONFS(newvp);
1515 if (np->n_rucred == NULL)
1516 np->n_rucred = crhold(cnp->cn_cred);
1517 if (np->n_wucred == NULL)
1518 np->n_wucred = crhold(cnp->cn_cred);
984263bc
MD
1519 *ap->a_vpp = newvp;
1520 }
1521 VTONFS(dvp)->n_flag |= NMODIFIED;
1522 if (!wccflag)
1523 VTONFS(dvp)->n_attrstamp = 0;
1524 return (error);
1525}
1526
1527/*
1528 * nfs file remove call
1529 * To try and make nfs semantics closer to ufs semantics, a file that has
1530 * other processes using the vnode is renamed instead of removed and then
1531 * removed later on the last close.
1532 * - If v_usecount > 1
1533 * If a rename is not already in the works
1534 * call nfs_sillyrename() to set it up
1535 * else
1536 * do the remove rpc
e851b29e
CP
1537 *
1538 * nfs_remove(struct vnodeop_desc *a_desc, struct vnode *a_dvp,
1539 * struct vnode *a_vp, struct componentname *a_cnp)
984263bc
MD
1540 */
1541static int
e851b29e 1542nfs_remove(struct vop_remove_args *ap)
984263bc 1543{
40393ded
RG
1544 struct vnode *vp = ap->a_vp;
1545 struct vnode *dvp = ap->a_dvp;
1546 struct componentname *cnp = ap->a_cnp;
1547 struct nfsnode *np = VTONFS(vp);
984263bc
MD
1548 int error = 0;
1549 struct vattr vattr;
1550
1551#ifndef DIAGNOSTIC
2b69e610 1552 if ((cnp->cn_flags & CNP_HASBUF) == 0)
984263bc
MD
1553 panic("nfs_remove: no name");
1554 if (vp->v_usecount < 1)
1555 panic("nfs_remove: bad v_usecount");
1556#endif
1557 if (vp->v_type == VDIR)
1558 error = EPERM;
1559 else if (vp->v_usecount == 1 || (np->n_sillyrename &&
3b568787 1560 VOP_GETATTR(vp, &vattr, cnp->cn_td) == 0 &&
984263bc
MD
1561 vattr.va_nlink > 1)) {
1562 /*
1563 * Purge the name cache so that the chance of a lookup for
1564 * the name succeeding while the remove is in progress is
1565 * minimized. Without node locking it can still happen, such
1566 * that an I/O op returns ESTALE, but since you get this if
1567 * another host removes the file..
1568 */
1569 cache_purge(vp);
1570 /*
1571 * throw away biocache buffers, mainly to avoid
1572 * unnecessary delayed writes later.
1573 */
3b568787 1574 error = nfs_vinvalbuf(vp, 0, cnp->cn_td, 1);
984263bc
MD
1575 /* Do the rpc */
1576 if (error != EINTR)
1577 error = nfs_removerpc(dvp, cnp->cn_nameptr,
dadab5e9 1578 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td);
984263bc
MD
1579 /*
1580 * Kludge City: If the first reply to the remove rpc is lost..
1581 * the reply to the retransmitted request will be ENOENT
1582 * since the file was in fact removed
1583 * Therefore, we cheat and return success.
1584 */
1585 if (error == ENOENT)
1586 error = 0;
1587 } else if (!np->n_sillyrename)
1588 error = nfs_sillyrename(dvp, vp, cnp);
1589 np->n_attrstamp = 0;
1590 return (error);
1591}
1592
1593/*
1594 * nfs file remove rpc called from nfs_inactive
1595 */
1596int
dadab5e9 1597nfs_removeit(struct sillyrename *sp)
984263bc 1598{
dadab5e9
MD
1599 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen,
1600 sp->s_cred, NULL));
984263bc
MD
1601}
1602
1603/*
1604 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1605 */
1606static int
e851b29e
CP
1607nfs_removerpc(struct vnode *dvp, const char *name, int namelen,
1608 struct ucred *cred, struct thread *td)
984263bc 1609{
40393ded
RG
1610 u_int32_t *tl;
1611 caddr_t cp;
1612 int32_t t1, t2;
984263bc
MD
1613 caddr_t bpos, dpos, cp2;
1614 int error = 0, wccflag = NFSV3_WCCRATTR;
1615 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1616 int v3 = NFS_ISV3(dvp);
1617
1618 nfsstats.rpccnt[NFSPROC_REMOVE]++;
1619 nfsm_reqhead(dvp, NFSPROC_REMOVE,
1620 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1621 nfsm_fhtom(dvp, v3);
1622 nfsm_strtom(name, namelen, NFS_MAXNAMLEN);
dadab5e9 1623 nfsm_request(dvp, NFSPROC_REMOVE, td, cred);
984263bc
MD
1624 if (v3)
1625 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1626 m_freem(mrep);
1627nfsmout:
984263bc
MD
1628 VTONFS(dvp)->n_flag |= NMODIFIED;
1629 if (!wccflag)
1630 VTONFS(dvp)->n_attrstamp = 0;
1631 return (error);
1632}
1633
1634/*
1635 * nfs file rename call
e851b29e
CP
1636 *
1637 * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
1638 * struct componentname *a_fcnp, struct vnode *a_tdvp,
1639 * struct vnode *a_tvp, struct componentname *a_tcnp)
984263bc
MD
1640 */
1641static int
e851b29e 1642nfs_rename(struct vop_rename_args *ap)
984263bc 1643{
40393ded
RG
1644 struct vnode *fvp = ap->a_fvp;
1645 struct vnode *tvp = ap->a_tvp;
1646 struct vnode *fdvp = ap->a_fdvp;
1647 struct vnode *tdvp = ap->a_tdvp;
1648 struct componentname *tcnp = ap->a_tcnp;
1649 struct componentname *fcnp = ap->a_fcnp;
984263bc
MD
1650 int error;
1651
1652#ifndef DIAGNOSTIC
2b69e610
MD
1653 if ((tcnp->cn_flags & CNP_HASBUF) == 0 ||
1654 (fcnp->cn_flags & CNP_HASBUF) == 0)
984263bc
MD
1655 panic("nfs_rename: no name");
1656#endif
1657 /* Check for cross-device rename */
1658 if ((fvp->v_mount != tdvp->v_mount) ||
1659 (tvp && (fvp->v_mount != tvp->v_mount))) {
1660 error = EXDEV;
1661 goto out;
1662 }
1663
1664 /*
1665 * We have to flush B_DELWRI data prior to renaming
1666 * the file. If we don't, the delayed-write buffers
1667 * can be flushed out later after the file has gone stale
1668 * under NFSV3. NFSV2 does not have this problem because
1669 * ( as far as I can tell ) it flushes dirty buffers more
1670 * often.
1671 */
1672
3b568787 1673 VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_td);
984263bc 1674 if (tvp)
3b568787 1675 VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_td);
984263bc
MD
1676
1677 /*
1678 * If the tvp exists and is in use, sillyrename it before doing the
1679 * rename of the new file over it.
1680 * XXX Can't sillyrename a directory.
1681 */
1682 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename &&
1683 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1684 vput(tvp);
1685 tvp = NULL;
1686 }
1687
1688 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1689 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
dadab5e9 1690 tcnp->cn_td);
984263bc
MD
1691
1692 if (fvp->v_type == VDIR) {
1693 if (tvp != NULL && tvp->v_type == VDIR)
1694 cache_purge(tdvp);
1695 cache_purge(fdvp);
1696 }
1697
1698out:
1699 if (tdvp == tvp)
1700 vrele(tdvp);
1701 else
1702 vput(tdvp);
1703 if (tvp)
1704 vput(tvp);
1705 vrele(fdvp);
1706 vrele(fvp);
1707 /*
1708 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1709 */
1710 if (error == ENOENT)
1711 error = 0;
1712 return (error);
1713}
1714
1715/*
1716 * nfs file rename rpc called from nfs_remove() above
1717 */
1718static int
e851b29e
CP
1719nfs_renameit(struct vnode *sdvp, struct componentname *scnp,
1720 struct sillyrename *sp)
984263bc
MD
1721{
1722 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
dadab5e9 1723 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td));
984263bc
MD
1724}
1725
1726/*
1727 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1728 */
1729static int
e851b29e
CP
1730nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen,
1731 struct vnode *tdvp, const char *tnameptr, int tnamelen,
1732 struct ucred *cred, struct thread *td)
984263bc 1733{
40393ded
RG
1734 u_int32_t *tl;
1735 caddr_t cp;
1736 int32_t t1, t2;
984263bc
MD
1737 caddr_t bpos, dpos, cp2;
1738 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
1739 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1740 int v3 = NFS_ISV3(fdvp);
1741
1742 nfsstats.rpccnt[NFSPROC_RENAME]++;
1743 nfsm_reqhead(fdvp, NFSPROC_RENAME,
1744 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) +
1745 nfsm_rndup(tnamelen));
1746 nfsm_fhtom(fdvp, v3);
1747 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN);
1748 nfsm_fhtom(tdvp, v3);
1749 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN);
dadab5e9 1750 nfsm_request(fdvp, NFSPROC_RENAME, td, cred);
984263bc
MD
1751 if (v3) {
1752 nfsm_wcc_data(fdvp, fwccflag);
1753 nfsm_wcc_data(tdvp, twccflag);
1754 }
6b08710e
MD
1755 m_freem(mrep);
1756nfsmout:
984263bc
MD
1757 VTONFS(fdvp)->n_flag |= NMODIFIED;
1758 VTONFS(tdvp)->n_flag |= NMODIFIED;
1759 if (!fwccflag)
1760 VTONFS(fdvp)->n_attrstamp = 0;
1761 if (!twccflag)
1762 VTONFS(tdvp)->n_attrstamp = 0;
1763 return (error);
1764}
1765
1766/*
1767 * nfs hard link create call
e851b29e
CP
1768 *
1769 * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp,
1770 * struct componentname *a_cnp)
984263bc
MD
1771 */
1772static int
e851b29e 1773nfs_link(struct vop_link_args *ap)
984263bc 1774{
40393ded
RG
1775 struct vnode *vp = ap->a_vp;
1776 struct vnode *tdvp = ap->a_tdvp;
1777 struct componentname *cnp = ap->a_cnp;
1778 u_int32_t *tl;
1779 caddr_t cp;
1780 int32_t t1, t2;
984263bc
MD
1781 caddr_t bpos, dpos, cp2;
1782 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
1783 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1784 int v3;
1785
1786 if (vp->v_mount != tdvp->v_mount) {
1787 return (EXDEV);
1788 }
1789
1790 /*
1791 * Push all writes to the server, so that the attribute cache
1792 * doesn't get "out of sync" with the server.
1793 * XXX There should be a better way!
1794 */
3b568787 1795 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_td);
984263bc
MD
1796
1797 v3 = NFS_ISV3(vp);
1798 nfsstats.rpccnt[NFSPROC_LINK]++;
1799 nfsm_reqhead(vp, NFSPROC_LINK,
1800 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
1801 nfsm_fhtom(vp, v3);
1802 nfsm_fhtom(tdvp, v3);
1803 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
dadab5e9 1804 nfsm_request(vp, NFSPROC_LINK, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1805 if (v3) {
1806 nfsm_postop_attr(vp, attrflag);
1807 nfsm_wcc_data(tdvp, wccflag);
1808 }
6b08710e
MD
1809 m_freem(mrep);
1810nfsmout:
984263bc
MD
1811 VTONFS(tdvp)->n_flag |= NMODIFIED;
1812 if (!attrflag)
1813 VTONFS(vp)->n_attrstamp = 0;
1814 if (!wccflag)
1815 VTONFS(tdvp)->n_attrstamp = 0;
1816 /*
1817 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1818 */
1819 if (error == EEXIST)
1820 error = 0;
1821 return (error);
1822}
1823
1824/*
1825 * nfs symbolic link create call
e851b29e
CP
1826 *
1827 * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1828 * struct componentname *a_cnp, struct vattr *a_vap,
1829 * char *a_target)
984263bc
MD
1830 */
1831static int
e851b29e 1832nfs_symlink(struct vop_symlink_args *ap)
984263bc 1833{
40393ded
RG
1834 struct vnode *dvp = ap->a_dvp;
1835 struct vattr *vap = ap->a_vap;
1836 struct componentname *cnp = ap->a_cnp;
1837 struct nfsv2_sattr *sp;
1838 u_int32_t *tl;
1839 caddr_t cp;
1840 int32_t t1, t2;
984263bc
MD
1841 caddr_t bpos, dpos, cp2;
1842 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
1843 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1844 struct vnode *newvp = (struct vnode *)0;
1845 int v3 = NFS_ISV3(dvp);
1846
1847 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1848 slen = strlen(ap->a_target);
1849 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED +
1850 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3));
1851 nfsm_fhtom(dvp, v3);
1852 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1853 if (v3) {
1854 nfsm_v3attrbuild(vap, FALSE);
1855 }
1856 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
1857 if (!v3) {
1858 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1859 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
1860 sp->sa_uid = nfs_xdrneg1;
1861 sp->sa_gid = nfs_xdrneg1;
1862 sp->sa_size = nfs_xdrneg1;
1863 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1864 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1865 }
1866
1867 /*
1868 * Issue the NFS request and get the rpc response.
1869 *
1870 * Only NFSv3 responses returning an error of 0 actually return
1871 * a file handle that can be converted into newvp without having
1872 * to do an extra lookup rpc.
1873 */
dadab5e9 1874 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1875 if (v3) {
1876 if (error == 0)
1877 nfsm_mtofh(dvp, newvp, v3, gotvp);
1878 nfsm_wcc_data(dvp, wccflag);
1879 }
1880
1881 /*
1882 * out code jumps -> here, mrep is also freed.
1883 */
1884
6b08710e
MD
1885 m_freem(mrep);
1886nfsmout:
984263bc
MD
1887
1888 /*
1889 * If we get an EEXIST error, silently convert it to no-error
1890 * in case of an NFS retry.
1891 */
1892 if (error == EEXIST)
1893 error = 0;
1894
1895 /*
1896 * If we do not have (or no longer have) an error, and we could
1897 * not extract the newvp from the response due to the request being
1898 * NFSv2 or the error being EEXIST. We have to do a lookup in order
1899 * to obtain a newvp to return.
1900 */
1901 if (error == 0 && newvp == NULL) {
1902 struct nfsnode *np = NULL;
1903
1904 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
dadab5e9 1905 cnp->cn_cred, cnp->cn_td, &np);
984263bc
MD
1906 if (!error)
1907 newvp = NFSTOV(np);
1908 }
1909 if (error) {
1910 if (newvp)
1911 vput(newvp);
1912 } else {
1913 *ap->a_vpp = newvp;
1914 }
1915 VTONFS(dvp)->n_flag |= NMODIFIED;
1916 if (!wccflag)
1917 VTONFS(dvp)->n_attrstamp = 0;
1918 return (error);
1919}
1920
1921/*
1922 * nfs make dir call
e851b29e
CP
1923 *
1924 * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
1925 * struct componentname *a_cnp, struct vattr *a_vap)
984263bc
MD
1926 */
1927static int
e851b29e 1928nfs_mkdir(struct vop_mkdir_args *ap)
984263bc 1929{
40393ded
RG
1930 struct vnode *dvp = ap->a_dvp;
1931 struct vattr *vap = ap->a_vap;
1932 struct componentname *cnp = ap->a_cnp;
1933 struct nfsv2_sattr *sp;
1934 u_int32_t *tl;
1935 caddr_t cp;
1936 int32_t t1, t2;
1937 int len;
984263bc
MD
1938 struct nfsnode *np = (struct nfsnode *)0;
1939 struct vnode *newvp = (struct vnode *)0;
1940 caddr_t bpos, dpos, cp2;
1941 int error = 0, wccflag = NFSV3_WCCRATTR;
1942 int gotvp = 0;
1943 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1944 struct vattr vattr;
1945 int v3 = NFS_ISV3(dvp);
1946
3b568787 1947 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) {
984263bc
MD
1948 return (error);
1949 }
1950 len = cnp->cn_namelen;
1951 nfsstats.rpccnt[NFSPROC_MKDIR]++;
1952 nfsm_reqhead(dvp, NFSPROC_MKDIR,
1953 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3));
1954 nfsm_fhtom(dvp, v3);
1955 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
1956 if (v3) {
1957 nfsm_v3attrbuild(vap, FALSE);
1958 } else {
1959 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1960 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
1961 sp->sa_uid = nfs_xdrneg1;
1962 sp->sa_gid = nfs_xdrneg1;
1963 sp->sa_size = nfs_xdrneg1;
1964 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1965 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1966 }
dadab5e9 1967 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1968 if (!error)
1969 nfsm_mtofh(dvp, newvp, v3, gotvp);
1970 if (v3)
1971 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1972 m_freem(mrep);
1973nfsmout:
984263bc
MD
1974 VTONFS(dvp)->n_flag |= NMODIFIED;
1975 if (!wccflag)
1976 VTONFS(dvp)->n_attrstamp = 0;
1977 /*
1978 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
1979 * if we can succeed in looking up the directory.
1980 */
1981 if (error == EEXIST || (!error && !gotvp)) {
1982 if (newvp) {
1983 vrele(newvp);
1984 newvp = (struct vnode *)0;
1985 }
1986 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
dadab5e9 1987 cnp->cn_td, &np);
984263bc
MD
1988 if (!error) {
1989 newvp = NFSTOV(np);
1990 if (newvp->v_type != VDIR)
1991 error = EEXIST;
1992 }
1993 }
1994 if (error) {
1995 if (newvp)
1996 vrele(newvp);
1997 } else
1998 *ap->a_vpp = newvp;
1999 return (error);
2000}
2001
2002/*
2003 * nfs remove directory call
e851b29e
CP
2004 *
2005 * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
2006 * struct componentname *a_cnp)
984263bc
MD
2007 */
2008static int
e851b29e 2009nfs_rmdir(struct vop_rmdir_args *ap)
984263bc 2010{
40393ded
RG
2011 struct vnode *vp = ap->a_vp;
2012 struct vnode *dvp = ap->a_dvp;
2013 struct componentname *cnp = ap->a_cnp;
2014 u_int32_t *tl;
2015 caddr_t cp;
2016 int32_t t1, t2;
984263bc
MD
2017 caddr_t bpos, dpos, cp2;
2018 int error = 0, wccflag = NFSV3_WCCRATTR;
2019 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2020 int v3 = NFS_ISV3(dvp);
2021
2022 if (dvp == vp)
2023 return (EINVAL);
2024 nfsstats.rpccnt[NFSPROC_RMDIR]++;
2025 nfsm_reqhead(dvp, NFSPROC_RMDIR,
2026 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
2027 nfsm_fhtom(dvp, v3);
2028 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
dadab5e9 2029 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_td, cnp->cn_cred);
984263bc
MD
2030 if (v3)
2031 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
2032 m_freem(mrep);
2033nfsmout:
984263bc
MD
2034 VTONFS(dvp)->n_flag |= NMODIFIED;
2035 if (!wccflag)
2036 VTONFS(dvp)->n_attrstamp = 0;
2037 cache_purge(dvp);
2038 cache_purge(vp);
2039 /*
2040 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2041 */
2042 if (error == ENOENT)
2043 error = 0;
2044 return (error);
2045}
2046
2047/*
2048 * nfs readdir call
e851b29e
CP
2049 *
2050 * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
984263bc
MD
2051 */
2052static int
e851b29e 2053nfs_readdir(struct vop_readdir_args *ap)
984263bc 2054{
40393ded
RG
2055 struct vnode *vp = ap->a_vp;
2056 struct nfsnode *np = VTONFS(vp);
2057 struct uio *uio = ap->a_uio;
984263bc
MD
2058 int tresid, error;
2059 struct vattr vattr;
2060
2061 if (vp->v_type != VDIR)
2062 return (EPERM);
2063 /*
2064 * First, check for hit on the EOF offset cache
2065 */
2066 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2067 (np->n_flag & NMODIFIED) == 0) {
2068 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) {
2069 if (NQNFS_CKCACHABLE(vp, ND_READ)) {
2070 nfsstats.direofcache_hits++;
2071 return (0);
2072 }
3b568787 2073 } else if (VOP_GETATTR(vp, &vattr, uio->uio_td) == 0 &&
984263bc
MD
2074 np->n_mtime == vattr.va_mtime.tv_sec) {
2075 nfsstats.direofcache_hits++;
2076 return (0);
2077 }
2078 }
2079
2080 /*
2081 * Call nfs_bioread() to do the real work.
2082 */
2083 tresid = uio->uio_resid;
3b568787 2084 error = nfs_bioread(vp, uio, 0);
984263bc
MD
2085
2086 if (!error && uio->uio_resid == tresid)
2087 nfsstats.direofcache_misses++;
2088 return (error);
2089}
2090
2091/*
2092 * Readdir rpc call.
2093 * Called from below the buffer cache by nfs_doio().
2094 */
2095int
3b568787 2096nfs_readdirrpc(struct vnode *vp, struct uio *uiop)
984263bc 2097{
40393ded
RG
2098 int len, left;
2099 struct dirent *dp = NULL;
2100 u_int32_t *tl;
2101 caddr_t cp;
2102 int32_t t1, t2;
2103 nfsuint64 *cookiep;
984263bc
MD
2104 caddr_t bpos, dpos, cp2;
2105 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2106 nfsuint64 cookie;
2107 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2108 struct nfsnode *dnp = VTONFS(vp);
2109 u_quad_t fileno;
2110 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2111 int attrflag;
2112 int v3 = NFS_ISV3(vp);
2113
2114#ifndef DIAGNOSTIC
2115 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2116 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2117 panic("nfs readdirrpc bad uio");
2118#endif
2119
2120 /*
2121 * If there is no cookie, assume directory was stale.
2122 */
2123 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2124 if (cookiep)
2125 cookie = *cookiep;
2126 else
2127 return (NFSERR_BAD_COOKIE);
2128 /*
2129 * Loop around doing readdir rpc's of size nm_readdirsize
2130 * truncated to a multiple of DIRBLKSIZ.
2131 * The stopping criteria is EOF or buffer full.
2132 */
2133 while (more_dirs && bigenough) {
2134 nfsstats.rpccnt[NFSPROC_READDIR]++;
2135 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) +
2136 NFSX_READDIR(v3));
2137 nfsm_fhtom(vp, v3);
2138 if (v3) {
2139 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
2140 *tl++ = cookie.nfsuquad[0];
2141 *tl++ = cookie.nfsuquad[1];
2142 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2143 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2144 } else {
2145 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2146 *tl++ = cookie.nfsuquad[0];
2147 }
2148 *tl = txdr_unsigned(nmp->nm_readdirsize);
c1cf1e59 2149 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_td, nfs_vpcred(vp, ND_READ));
984263bc
MD
2150 if (v3) {
2151 nfsm_postop_attr(vp, attrflag);
2152 if (!error) {
2153 nfsm_dissect(tl, u_int32_t *,
2154 2 * NFSX_UNSIGNED);
2155 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2156 dnp->n_cookieverf.nfsuquad[1] = *tl;
2157 } else {
2158 m_freem(mrep);
2159 goto nfsmout;
2160 }
2161 }
2162 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2163 more_dirs = fxdr_unsigned(int, *tl);
2164
2165 /* loop thru the dir entries, doctoring them to 4bsd form */
2166 while (more_dirs && bigenough) {
2167 if (v3) {
2168 nfsm_dissect(tl, u_int32_t *,
2169 3 * NFSX_UNSIGNED);
2170 fileno = fxdr_hyper(tl);
2171 len = fxdr_unsigned(int, *(tl + 2));
2172 } else {
2173 nfsm_dissect(tl, u_int32_t *,
2174 2 * NFSX_UNSIGNED);
2175 fileno = fxdr_unsigned(u_quad_t, *tl++);
2176 len = fxdr_unsigned(int, *tl);
2177 }
2178 if (len <= 0 || len > NFS_MAXNAMLEN) {
2179 error = EBADRPC;
2180 m_freem(mrep);
2181 goto nfsmout;
2182 }
2183 tlen = nfsm_rndup(len);
2184 if (tlen == len)
2185 tlen += 4; /* To ensure null termination */
2186 left = DIRBLKSIZ - blksiz;
2187 if ((tlen + DIRHDSIZ) > left) {
2188 dp->d_reclen += left;
2189 uiop->uio_iov->iov_base += left;
2190 uiop->uio_iov->iov_len -= left;
2191 uiop->uio_offset += left;
2192 uiop->uio_resid -= left;
2193 blksiz = 0;
2194 }
2195 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2196 bigenough = 0;
2197 if (bigenough) {
2198 dp = (struct dirent *)uiop->uio_iov->iov_base;
2199 dp->d_fileno = (int)fileno;
2200 dp->d_namlen = len;
2201 dp->d_reclen = tlen + DIRHDSIZ;
2202 dp->d_type = DT_UNKNOWN;
2203 blksiz += dp->d_reclen;
2204 if (blksiz == DIRBLKSIZ)
2205 blksiz = 0;
2206 uiop->uio_offset += DIRHDSIZ;
2207 uiop->uio_resid -= DIRHDSIZ;
2208 uiop->uio_iov->iov_base += DIRHDSIZ;
2209 uiop->uio_iov->iov_len -= DIRHDSIZ;
2210 nfsm_mtouio(uiop, len);
2211 cp = uiop->uio_iov->iov_base;
2212 tlen -= len;
2213 *cp = '\0'; /* null terminate */
2214 uiop->uio_iov->iov_base += tlen;
2215 uiop->uio_iov->iov_len -= tlen;
2216 uiop->uio_offset += tlen;
2217 uiop->uio_resid -= tlen;
2218 } else
2219 nfsm_adv(nfsm_rndup(len));
2220 if (v3) {
2221 nfsm_dissect(tl, u_int32_t *,
2222 3 * NFSX_UNSIGNED);
2223 } else {
2224 nfsm_dissect(tl, u_int32_t *,
2225 2 * NFSX_UNSIGNED);
2226 }
2227 if (bigenough) {
2228 cookie.nfsuquad[0] = *tl++;
2229 if (v3)
2230 cookie.nfsuquad[1] = *tl++;
2231 } else if (v3)
2232 tl += 2;
2233 else
2234 tl++;
2235 more_dirs = fxdr_unsigned(int, *tl);
2236 }
2237 /*
2238 * If at end of rpc data, get the eof boolean
2239 */
2240 if (!more_dirs) {
2241 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2242 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2243 }
2244 m_freem(mrep);
2245 }
2246 /*
2247 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2248 * by increasing d_reclen for the last record.
2249 */
2250 if (blksiz > 0) {
2251 left = DIRBLKSIZ - blksiz;
2252 dp->d_reclen += left;
2253 uiop->uio_iov->iov_base += left;
2254 uiop->uio_iov->iov_len -= left;
2255 uiop->uio_offset += left;
2256 uiop->uio_resid -= left;
2257 }
2258
2259 /*
2260 * We are now either at the end of the directory or have filled the
2261 * block.
2262 */
2263 if (bigenough)
2264 dnp->n_direofoffset = uiop->uio_offset;
2265 else {
2266 if (uiop->uio_resid > 0)
2267 printf("EEK! readdirrpc resid > 0\n");
2268 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2269 *cookiep = cookie;
2270 }
2271nfsmout:
2272 return (error);
2273}
2274
2275/*
2276 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2277 */
2278int
3b568787 2279nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop)
984263bc 2280{
40393ded
RG
2281 int len, left;
2282 struct dirent *dp;
2283 u_int32_t *tl;
2284 caddr_t cp;
2285 int32_t t1, t2;
2286 struct vnode *newvp;
2287 nfsuint64 *cookiep;
984263bc
MD
2288 caddr_t bpos, dpos, cp2, dpossav1, dpossav2;
2289 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2;
2290 struct nameidata nami, *ndp = &nami;
2291 struct componentname *cnp = &ndp->ni_cnd;
2292 nfsuint64 cookie;
2293 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2294 struct nfsnode *dnp = VTONFS(vp), *np;
2295 nfsfh_t *fhp;
2296 u_quad_t fileno;
2297 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2298 int attrflag, fhsize;
2299
2300#ifndef nolint
2301 dp = (struct dirent *)0;
2302#endif
2303#ifndef DIAGNOSTIC
2304 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2305 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2306 panic("nfs readdirplusrpc bad uio");
2307#endif
2308 ndp->ni_dvp = vp;
2309 newvp = NULLVP;
2310
2311 /*
2312 * If there is no cookie, assume directory was stale.
2313 */
2314 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2315 if (cookiep)
2316 cookie = *cookiep;
2317 else
2318 return (NFSERR_BAD_COOKIE);
2319 /*
2320 * Loop around doing readdir rpc's of size nm_readdirsize
2321 * truncated to a multiple of DIRBLKSIZ.
2322 * The stopping criteria is EOF or buffer full.
2323 */
2324 while (more_dirs && bigenough) {
2325 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
2326 nfsm_reqhead(vp, NFSPROC_READDIRPLUS,
2327 NFSX_FH(1) + 6 * NFSX_UNSIGNED);
2328 nfsm_fhtom(vp, 1);
2329 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
2330 *tl++ = cookie.nfsuquad[0];
2331 *tl++ = cookie.nfsuquad[1];
2332 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2333 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2334 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2335 *tl = txdr_unsigned(nmp->nm_rsize);
c1cf1e59 2336 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_td, nfs_vpcred(vp, ND_READ));
984263bc
MD
2337 nfsm_postop_attr(vp, attrflag);
2338 if (error) {
2339 m_freem(mrep);
2340 goto nfsmout;
2341 }
2342 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2343 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2344 dnp->n_cookieverf.nfsuquad[1] = *tl++;
2345 more_dirs = fxdr_unsigned(int, *tl);
2346
2347 /* loop thru the dir entries, doctoring them to 4bsd form */
2348 while (more_dirs && bigenough) {
2349 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2350 fileno = fxdr_hyper(tl);
2351 len = fxdr_unsigned(int, *(tl + 2));
2352 if (len <= 0 || len > NFS_MAXNAMLEN) {
2353 error = EBADRPC;
2354 m_freem(mrep);
2355 goto nfsmout;
2356 }
2357 tlen = nfsm_rndup(len);
2358 if (tlen == len)
2359 tlen += 4; /* To ensure null termination*/
2360 left = DIRBLKSIZ - blksiz;
2361 if ((tlen + DIRHDSIZ) > left) {
2362 dp->d_reclen += left;
2363 uiop->uio_iov->iov_base += left;
2364 uiop->uio_iov->iov_len -= left;
2365 uiop->uio_offset += left;
2366 uiop->uio_resid -= left;
2367 blksiz = 0;
2368 }
2369 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2370 bigenough = 0;
2371 if (bigenough) {
2372 dp = (struct dirent *)uiop->uio_iov->iov_base;
2373 dp->d_fileno = (int)fileno;
2374 dp->d_namlen = len;
2375 dp->d_reclen = tlen + DIRHDSIZ;
2376 dp->d_type = DT_UNKNOWN;
2377 blksiz += dp->d_reclen;
2378 if (blksiz == DIRBLKSIZ)
2379 blksiz = 0;
2380 uiop->uio_offset += DIRHDSIZ;
2381 uiop->uio_resid -= DIRHDSIZ;
2382 uiop->uio_iov->iov_base += DIRHDSIZ;
2383 uiop->uio_iov->iov_len -= DIRHDSIZ;
2384 cnp->cn_nameptr = uiop->uio_iov->iov_base;
2385 cnp->cn_namelen = len;
2386 nfsm_mtouio(uiop, len);
2387 cp = uiop->uio_iov->iov_base;
2388 tlen -= len;
2389 *cp = '\0';
2390 uiop->uio_iov->iov_base += tlen;
2391 uiop->uio_iov->iov_len -= tlen;
2392 uiop->uio_offset += tlen;
2393 uiop->uio_resid -= tlen;
2394 } else
2395 nfsm_adv(nfsm_rndup(len));
2396 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2397 if (bigenough) {
2398 cookie.nfsuquad[0] = *tl++;
2399 cookie.nfsuquad[1] = *tl++;
2400 } else
2401 tl += 2;
2402
2403 /*
2404 * Since the attributes are before the file handle
2405 * (sigh), we must skip over the attributes and then
2406 * come back and get them.
2407 */
2408 attrflag = fxdr_unsigned(int, *tl);
2409 if (attrflag) {
2410 dpossav1 = dpos;
2411 mdsav1 = md;
2412 nfsm_adv(NFSX_V3FATTR);
2413 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2414 doit = fxdr_unsigned(int, *tl);
2415 if (doit) {
2416 nfsm_getfh(fhp, fhsize, 1);
2417 if (NFS_CMPFH(dnp, fhp, fhsize)) {
597aea93 2418 vref(vp);
984263bc
MD
2419 newvp = vp;
2420 np = dnp;
2421 } else {
2422 error = nfs_nget(vp->v_mount, fhp,
2423 fhsize, &np);
2424 if (error)
2425 doit = 0;
2426 else
2427 newvp = NFSTOV(np);
2428 }
2429 }
2430 if (doit && bigenough) {
2431 dpossav2 = dpos;
2432 dpos = dpossav1;
2433 mdsav2 = md;
2434 md = mdsav1;
2435 nfsm_loadattr(newvp, (struct vattr *)0);
2436 dpos = dpossav2;
2437 md = mdsav2;
2438 dp->d_type =
2439 IFTODT(VTTOIF(np->n_vattr.va_type));
2440 ndp->ni_vp = newvp;
bc0c094e 2441 cache_enter(ndp->ni_dvp, NCPNULL, ndp->ni_vp, cnp);
984263bc
MD
2442 }
2443 } else {
2444 /* Just skip over the file handle */
2445 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2446 i = fxdr_unsigned(int, *tl);
2447 nfsm_adv(nfsm_rndup(i));
2448 }
2449 if (newvp != NULLVP) {
2450 if (newvp == vp)
2451 vrele(newvp);
2452 else
2453 vput(newvp);
2454 newvp = NULLVP;
2455 }
2456 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2457 more_dirs = fxdr_unsigned(int, *tl);
2458 }
2459 /*
2460 * If at end of rpc data, get the eof boolean
2461 */
2462 if (!more_dirs) {
2463 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2464 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2465 }
2466 m_freem(mrep);
2467 }
2468 /*
2469 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2470 * by increasing d_reclen for the last record.
2471 */
2472 if (blksiz > 0) {
2473 left = DIRBLKSIZ - blksiz;
2474 dp->d_reclen += left;
2475 uiop->uio_iov->iov_base += left;
2476 uiop->uio_iov->iov_len -= left;
2477 uiop->uio_offset += left;
2478 uiop->uio_resid -= left;
2479 }
2480
2481 /*
2482 * We are now either at the end of the directory or have filled the
2483 * block.
2484 */
2485 if (bigenough)
2486 dnp->n_direofoffset = uiop->uio_offset;
2487 else {
2488 if (uiop->uio_resid > 0)
2489 printf("EEK! readdirplusrpc resid > 0\n");
2490 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2491 *cookiep = cookie;
2492 }
2493nfsmout:
2494 if (newvp != NULLVP) {
2495 if (newvp == vp)
2496 vrele(newvp);
2497 else
2498 vput(newvp);
2499 newvp = NULLVP;
2500 }
2501 return (error);
2502}
2503
2504/*
2505 * Silly rename. To make the NFS filesystem that is stateless look a little
2506 * more like the "ufs" a remove of an active vnode is translated to a rename
2507 * to a funny looking filename that is removed by nfs_inactive on the
2508 * nfsnode. There is the potential for another process on a different client
2509 * to create the same funny name between the nfs_lookitup() fails and the
2510 * nfs_rename() completes, but...
2511 */
2512static int
e851b29e 2513nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
984263bc 2514{
40393ded 2515 struct sillyrename *sp;
984263bc
MD
2516 struct nfsnode *np;
2517 int error;
984263bc
MD
2518
2519 cache_purge(dvp);
2520 np = VTONFS(vp);
2521#ifndef DIAGNOSTIC
2522 if (vp->v_type == VDIR)
2523 panic("nfs: sillyrename dir");
2524#endif
2525 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2526 M_NFSREQ, M_WAITOK);
2527 sp->s_cred = crdup(cnp->cn_cred);
2528 sp->s_dvp = dvp;
597aea93 2529 vref(dvp);
984263bc
MD
2530
2531 /* Fudge together a funny name */
dadab5e9 2532 sp->s_namlen = sprintf(sp->s_name, ".nfsA%08x4.4", (int)cnp->cn_td);
984263bc
MD
2533
2534 /* Try lookitups until we get one that isn't there */
2535 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
dadab5e9 2536 cnp->cn_td, (struct nfsnode **)0) == 0) {
984263bc
MD
2537 sp->s_name[4]++;
2538 if (sp->s_name[4] > 'z') {
2539 error = EINVAL;
2540 goto bad;
2541 }
2542 }
2543 error = nfs_renameit(dvp, cnp, sp);
2544 if (error)
2545 goto bad;
2546 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
dadab5e9 2547 cnp->cn_td, &np);
984263bc
MD
2548 np->n_sillyrename = sp;
2549 return (0);
2550bad:
2551 vrele(sp->s_dvp);
2552 crfree(sp->s_cred);
2553 free((caddr_t)sp, M_NFSREQ);
2554 return (error);
2555}
2556
2557/*
2558 * Look up a file name and optionally either update the file handle or
2559 * allocate an nfsnode, depending on the value of npp.
2560 * npp == NULL --> just do the lookup
2561 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2562 * handled too
2563 * *npp != NULL --> update the file handle in the vnode
2564 */
2565static int
e851b29e
CP
2566nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred,
2567 struct thread *td, struct nfsnode **npp)
984263bc 2568{
40393ded
RG
2569 u_int32_t *tl;
2570 caddr_t cp;
2571 int32_t t1, t2;
984263bc
MD
2572 struct vnode *newvp = (struct vnode *)0;
2573 struct nfsnode *np, *dnp = VTONFS(dvp);
2574 caddr_t bpos, dpos, cp2;
2575 int error = 0, fhlen, attrflag;
2576 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2577 nfsfh_t *nfhp;
2578 int v3 = NFS_ISV3(dvp);
2579
2580 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
2581 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
2582 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2583 nfsm_fhtom(dvp, v3);
2584 nfsm_strtom(name, len, NFS_MAXNAMLEN);
dadab5e9 2585 nfsm_request(dvp, NFSPROC_LOOKUP, td, cred);
984263bc
MD
2586 if (npp && !error) {
2587 nfsm_getfh(nfhp, fhlen, v3);
2588 if (*npp) {
2589 np = *npp;
2590 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2591 free((caddr_t)np->n_fhp, M_NFSBIGFH);
2592 np->n_fhp = &np->n_fh;
2593 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2594 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK);
2595 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2596 np->n_fhsize = fhlen;
2597 newvp = NFSTOV(np);
2598 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
597aea93 2599 vref(dvp);
984263bc
MD
2600 newvp = dvp;
2601 } else {
2602 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
2603 if (error) {
2604 m_freem(mrep);
2605 return (error);
2606 }
2607 newvp = NFSTOV(np);
2608 }
2609 if (v3) {
2610 nfsm_postop_attr(newvp, attrflag);
2611 if (!attrflag && *npp == NULL) {
2612 m_freem(mrep);
2613 if (newvp == dvp)
2614 vrele(newvp);
2615 else
2616 vput(newvp);
2617 return (ENOENT);
2618 }
2619 } else
2620 nfsm_loadattr(newvp, (struct vattr *)0);
2621 }
6b08710e
MD
2622 m_freem(mrep);
2623nfsmout:
984263bc
MD
2624 if (npp && *npp == NULL) {
2625 if (error) {
2626 if (newvp) {
2627 if (newvp == dvp)
2628 vrele(newvp);
2629 else
2630 vput(newvp);
2631 }
2632 } else
2633 *npp = np;
2634 }
2635 return (error);
2636}
2637
2638/*
2639 * Nfs Version 3 commit rpc
2640 */
2641int
3b568787 2642nfs_commit(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td)
984263bc 2643{
40393ded
RG
2644 caddr_t cp;
2645 u_int32_t *tl;
2646 int32_t t1, t2;
2647 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
984263bc
MD
2648 caddr_t bpos, dpos, cp2;
2649 int error = 0, wccflag = NFSV3_WCCRATTR;
2650 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2651
2652 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
2653 return (0);
2654 nfsstats.rpccnt[NFSPROC_COMMIT]++;
2655 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1));
2656 nfsm_fhtom(vp, 1);
2657 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2658 txdr_hyper(offset, tl);
2659 tl += 2;
2660 *tl = txdr_unsigned(cnt);
c1cf1e59 2661 nfsm_request(vp, NFSPROC_COMMIT, td, nfs_vpcred(vp, ND_WRITE));
984263bc
MD
2662 nfsm_wcc_data(vp, wccflag);
2663 if (!error) {
2664 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF);
2665 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
2666 NFSX_V3WRITEVERF)) {
2667 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
2668 NFSX_V3WRITEVERF);
2669 error = NFSERR_STALEWRITEVERF;
2670 }
2671 }
6b08710e
MD
2672 m_freem(mrep);
2673nfsmout:
984263bc
MD
2674 return (error);
2675}
2676
2677/*
2678 * Kludge City..
2679 * - make nfs_bmap() essentially a no-op that does no translation
2680 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
2681 * (Maybe I could use the process's page mapping, but I was concerned that
2682 * Kernel Write might not be enabled and also figured copyout() would do
2683 * a lot more work than bcopy() and also it currently happens in the
2684 * context of the swapper process (2).
e851b29e
CP
2685 *
2686 * nfs_bmap(struct vnode *a_vp, daddr_t a_bn, struct vnode **a_vpp,
2687 * daddr_t *a_bnp, int *a_runp, int *a_runb)
984263bc
MD
2688 */
2689static int
e851b29e 2690nfs_bmap(struct vop_bmap_args *ap)
984263bc 2691{
40393ded 2692 struct vnode *vp = ap->a_vp;
984263bc
MD
2693
2694 if (ap->a_vpp != NULL)
2695 *ap->a_vpp = vp;
2696 if (ap->a_bnp != NULL)
2697 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize);
2698 if (ap->a_runp != NULL)
2699 *ap->a_runp = 0;
2700 if (ap->a_runb != NULL)
2701 *ap->a_runb = 0;
2702 return (0);
2703}
2704
2705/*
2706 * Strategy routine.
2707 * For async requests when nfsiod(s) are running, queue the request by
2708 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the
2709 * request.
2710 */
2711static int
e851b29e 2712nfs_strategy(struct vop_strategy_args *ap)
984263bc 2713{
40393ded 2714 struct buf *bp = ap->a_bp;
dadab5e9 2715 struct thread *td;
984263bc
MD
2716 int error = 0;
2717
2718 KASSERT(!(bp->b_flags & B_DONE), ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2719 KASSERT(BUF_REFCNT(bp) > 0, ("nfs_strategy: buffer %p not locked", bp));
2720
2721 if (bp->b_flags & B_PHYS)
2722 panic("nfs physio");
2723
2724 if (bp->b_flags & B_ASYNC)
dadab5e9 2725 td = NULL;
984263bc 2726 else
dadab5e9 2727 td = curthread; /* XXX */
984263bc 2728
984263bc
MD
2729 /*
2730 * If the op is asynchronous and an i/o daemon is waiting
2731 * queue the request, wake it up and wait for completion
2732 * otherwise just do it ourselves.
2733 */
2734 if ((bp->b_flags & B_ASYNC) == 0 ||
3b568787
MD
2735 nfs_asyncio(bp, td))
2736 error = nfs_doio(bp, td);
984263bc
MD
2737 return (error);
2738}
2739
2740/*
2741 * Mmap a file
2742 *
2743 * NB Currently unsupported.
e851b29e
CP
2744 *
2745 * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred,
2746 * struct thread *a_td)
984263bc
MD
2747 */
2748/* ARGSUSED */
2749static int
e851b29e 2750nfs_mmap(struct vop_mmap_args *ap)
984263bc 2751{
984263bc
MD
2752 return (EINVAL);
2753}
2754
2755/*
2756 * fsync vnode op. Just call nfs_flush() with commit == 1.
e851b29e
CP
2757 *
2758 * nfs_fsync(struct vnodeop_desc *a_desc, struct vnode *a_vp,
2759 * struct ucred * a_cred, int a_waitfor, struct thread *a_td)
984263bc
MD
2760 */
2761/* ARGSUSED */
2762static int
e851b29e 2763nfs_fsync(struct vop_fsync_args *ap)
984263bc 2764{
3b568787 2765 return (nfs_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1));
984263bc
MD
2766}
2767
2768/*
2769 * Flush all the blocks associated with a vnode.
2770 * Walk through the buffer pool and push any dirty pages
2771 * associated with the vnode.
2772 */
2773static int
e851b29e 2774nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit)
984263bc 2775{
40393ded
RG
2776 struct nfsnode *np = VTONFS(vp);
2777 struct buf *bp;
2778 int i;
984263bc
MD
2779 struct buf *nbp;
2780 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2781 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2782 int passone = 1;
2783 u_quad_t off, endoff, toff;
984263bc
MD
2784 struct buf **bvec = NULL;
2785#ifndef NFS_COMMITBVECSIZ
2786#define NFS_COMMITBVECSIZ 20
2787#endif
2788 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2789 int bvecsize = 0, bveccount;
2790
2791 if (nmp->nm_flag & NFSMNT_INT)
2792 slpflag = PCATCH;
2793 if (!commit)
2794 passone = 0;
2795 /*
2796 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2797 * server, but nas not been committed to stable storage on the server
2798 * yet. On the first pass, the byte range is worked out and the commit
2799 * rpc is done. On the second pass, nfs_writebp() is called to do the
2800 * job.
2801 */
2802again:
2803 off = (u_quad_t)-1;
2804 endoff = 0;
2805 bvecpos = 0;
2806 if (NFS_ISV3(vp) && commit) {
2807 s = splbio();
2808 /*
2809 * Count up how many buffers waiting for a commit.
2810 */
2811 bveccount = 0;
2812 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2813 nbp = TAILQ_NEXT(bp, b_vnbufs);
2814 if (BUF_REFCNT(bp) == 0 &&
2815 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2816 == (B_DELWRI | B_NEEDCOMMIT))
2817 bveccount++;
2818 }
2819 /*
2820 * Allocate space to remember the list of bufs to commit. It is
2821 * important to use M_NOWAIT here to avoid a race with nfs_write.
2822 * If we can't get memory (for whatever reason), we will end up
2823 * committing the buffers one-by-one in the loop below.
2824 */
2825 if (bvec != NULL && bvec != bvec_on_stack)
2826 free(bvec, M_TEMP);
2827 if (bveccount > NFS_COMMITBVECSIZ) {
2828 bvec = (struct buf **)
2829 malloc(bveccount * sizeof(struct buf *),
2830 M_TEMP, M_NOWAIT);
2831 if (bvec == NULL) {
2832 bvec = bvec_on_stack;
2833 bvecsize = NFS_COMMITBVECSIZ;
2834 } else
2835 bvecsize = bveccount;
2836 } else {
2837 bvec = bvec_on_stack;
2838 bvecsize = NFS_COMMITBVECSIZ;
2839 }
2840 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2841 nbp = TAILQ_NEXT(bp, b_vnbufs);
2842 if (bvecpos >= bvecsize)
2843 break;
2844 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2845 (B_DELWRI | B_NEEDCOMMIT) ||
2846 BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
2847 continue;
2848 bremfree(bp);
2849 /*
984263bc
MD
2850 * NOTE: we are not clearing B_DONE here, so we have
2851 * to do it later on in this routine if we intend to
2852 * initiate I/O on the bp.
2853 *
2854 * Note: to avoid loopback deadlocks, we do not
2855 * assign b_runningbufspace.
2856 */
984263bc
MD
2857 bp->b_flags |= B_WRITEINPROG;
2858 vfs_busy_pages(bp, 1);
2859
2860 /*
2861 * bp is protected by being locked, but nbp is not
2862 * and vfs_busy_pages() may sleep. We have to
2863 * recalculate nbp.
2864 */
2865 nbp = TAILQ_NEXT(bp, b_vnbufs);
2866
2867 /*
2868 * A list of these buffers is kept so that the
2869 * second loop knows which buffers have actually
2870 * been committed. This is necessary, since there
2871 * may be a race between the commit rpc and new
2872 * uncommitted writes on the file.
2873 */
2874 bvec[bvecpos++] = bp;
2875 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2876 bp->b_dirtyoff;
2877 if (toff < off)
2878 off = toff;
2879 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2880 if (toff > endoff)
2881 endoff = toff;
2882 }
2883 splx(s);
2884 }
2885 if (bvecpos > 0) {
2886 /*
3b568787
MD
2887 * Commit data on the server, as required. Note that
2888 * nfs_commit will use the vnode's cred for the commit.
984263bc 2889 */
3b568787 2890 retv = nfs_commit(vp, off, (int)(endoff - off), td);
984263bc
MD
2891
2892 if (retv == NFSERR_STALEWRITEVERF)
2893 nfs_clearcommit(vp->v_mount);
2894
2895 /*
2896 * Now, either mark the blocks I/O done or mark the
2897 * blocks dirty, depending on whether the commit
2898 * succeeded.
2899 */
2900 for (i = 0; i < bvecpos; i++) {
2901 bp = bvec[i];
2902 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG | B_CLUSTEROK);
2903 if (retv) {
2904 /*
2905 * Error, leave B_DELWRI intact
2906 */
2907 vfs_unbusy_pages(bp);
2908 brelse(bp);
2909 } else {
2910 /*
2911 * Success, remove B_DELWRI ( bundirty() ).
2912 *
2913 * b_dirtyoff/b_dirtyend seem to be NFS
2914 * specific. We should probably move that
2915 * into bundirty(). XXX
2916 */
2917 s = splbio();
2918 vp->v_numoutput++;
2919 bp->b_flags |= B_ASYNC;
2920 bundirty(bp);
2921 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR);
2922 bp->b_dirtyoff = bp->b_dirtyend = 0;
2923 splx(s);
2924 biodone(bp);
2925 }
2926 }
2927 }
2928
2929 /*
2930 * Start/do any write(s) that are required.
2931 */
2932loop:
2933 s = splbio();
2934 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2935 nbp = TAILQ_NEXT(bp, b_vnbufs);
2936 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) {
2937 if (waitfor != MNT_WAIT || passone)
2938 continue;
2939 error = BUF_TIMELOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL,
2940 "nfsfsync", slpflag, slptimeo);
2941 splx(s);
2942 if (error == 0)
2943 panic("nfs_fsync: inconsistent lock");
2944 if (error == ENOLCK)
2945 goto loop;
dadab5e9 2946 if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) {
984263bc
MD
2947 error = EINTR;
2948 goto done;
2949 }
2950 if (slpflag == PCATCH) {
2951 slpflag = 0;
2952 slptimeo = 2 * hz;
2953 }
2954 goto loop;
2955 }
2956 if ((bp->b_flags & B_DELWRI) == 0)
2957 panic("nfs_fsync: not dirty");
2958 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
2959 BUF_UNLOCK(bp);
2960 continue;
2961 }
2962 bremfree(bp);
2963 if (passone || !commit)
2964 bp->b_flags |= B_ASYNC;
2965 else
2966 bp->b_flags |= B_ASYNC | B_WRITEINPROG;
2967 splx(s);
2968 VOP_BWRITE(bp->b_vp, bp);
2969 goto loop;
2970 }
2971 splx(s);
2972 if (passone) {
2973 passone = 0;
2974 goto again;
2975 }
2976 if (waitfor == MNT_WAIT) {
2977 while (vp->v_numoutput) {
2978 vp->v_flag |= VBWAIT;
2979 error = tsleep((caddr_t)&vp->v_numoutput,
377d4740 2980 slpflag, "nfsfsync", slptimeo);
984263bc 2981 if (error) {
dadab5e9 2982 if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) {
984263bc
MD
2983 error = EINTR;
2984 goto done;
2985 }
2986 if (slpflag == PCATCH) {
2987 slpflag = 0;
2988 slptimeo = 2 * hz;
2989 }
2990 }
2991 }
2992 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd) && commit) {
2993 goto loop;
2994 }
2995 }
2996 if (np->n_flag & NWRITEERR) {
2997 error = np->n_error;
2998 np->n_flag &= ~NWRITEERR;
2999 }
3000done:
3001 if (bvec != NULL && bvec != bvec_on_stack)
3002 free(bvec, M_TEMP);
3003 return (error);
3004}
3005
3006/*
3007 * NFS advisory byte-level locks.
3008 * Currently unsupported.
e851b29e
CP
3009 *
3010 * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl,
3011 * int a_flags)
984263bc
MD
3012 */
3013static int
e851b29e 3014nfs_advlock(struct vop_advlock_args *ap)
984263bc 3015{
40393ded 3016 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3017
3018 /*
3019 * The following kludge is to allow diskless support to work
3020 * until a real NFS lockd is implemented. Basically, just pretend
3021 * that this is a local lock.
3022 */
3023 return (lf_advlock(ap, &(np->n_lockf), np->n_size));
3024}
3025
3026/*
3027 * Print out the contents of an nfsnode.
e851b29e
CP
3028 *
3029 * nfs_print(struct vnode *a_vp)
984263bc
MD
3030 */
3031static int
e851b29e 3032nfs_print(struct vop_print_args *ap)
984263bc 3033{
40393ded
RG
3034 struct vnode *vp = ap->a_vp;
3035 struct nfsnode *np = VTONFS(vp);
984263bc
MD
3036
3037 printf("tag VT_NFS, fileid %ld fsid 0x%x",
3038 np->n_vattr.va_fileid, np->n_vattr.va_fsid);
3039 if (vp->v_type == VFIFO)
3040 fifo_printinfo(vp);
3041 printf("\n");
3042 return (0);
3043}
3044
3045/*
3046 * Just call nfs_writebp() with the force argument set to 1.
3047 *
3048 * NOTE: B_DONE may or may not be set in a_bp on call.
e851b29e
CP
3049 *
3050 * nfs_bwrite(struct vnode *a_bp)
984263bc
MD
3051 */
3052static int
e851b29e 3053nfs_bwrite(struct vop_bwrite_args *ap)
984263bc 3054{
dadab5e9 3055 return (nfs_writebp(ap->a_bp, 1, curthread));
984263bc
MD
3056}
3057
3058/*
3059 * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless
3060 * the force flag is one and it also handles the B_NEEDCOMMIT flag. We set
3061 * B_CACHE if this is a VMIO buffer.
3062 */
3063int
e851b29e 3064nfs_writebp(struct buf *bp, int force, struct thread *td)
984263bc
MD
3065{
3066 int s;
3067 int oldflags = bp->b_flags;
3068#if 0
3069 int retv = 1;
3070 off_t off;
3071#endif
3072
3073 if (BUF_REFCNT(bp) == 0)
3074 panic("bwrite: buffer is not locked???");
3075
3076 if (bp->b_flags & B_INVAL) {
3077 brelse(bp);
3078 return(0);
3079 }
3080
3081 bp->b_flags |= B_CACHE;
3082
3083 /*
3084 * Undirty the bp. We will redirty it later if the I/O fails.
3085 */
3086
3087 s = splbio();
3088 bundirty(bp);
3089 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR);
3090
3091 bp->b_vp->v_numoutput++;
984263bc
MD
3092 splx(s);
3093
3094 /*
3095 * Note: to avoid loopback deadlocks, we do not
3096 * assign b_runningbufspace.
3097 */
3098 vfs_busy_pages(bp, 1);
3099
3100 if (force)
3101 bp->b_flags |= B_WRITEINPROG;
3102 BUF_KERNPROC(bp);
3103 VOP_STRATEGY(bp->b_vp, bp);
3104
3105 if( (oldflags & B_ASYNC) == 0) {
3106 int rtval = biowait(bp);
3107
3108 if (oldflags & B_DELWRI) {
3109 s = splbio();
3110 reassignbuf(bp, bp->b_vp);
3111 splx(s);
3112 }
3113
3114 brelse(bp);
3115 return (rtval);
3116 }
3117
3118 return (0);
3119}
3120
3121/*
3122 * nfs special file access vnode op.
3123 * Essentially just get vattr and then imitate iaccess() since the device is
3124 * local to the client.
e851b29e
CP
3125 *
3126 * nfsspec_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
3127 * struct thread *a_td)
984263bc
MD
3128 */
3129static int
e851b29e 3130nfsspec_access(struct vop_access_args *ap)
984263bc 3131{
40393ded
RG
3132 struct vattr *vap;
3133 gid_t *gp;
3134 struct ucred *cred = ap->a_cred;
984263bc
MD
3135 struct vnode *vp = ap->a_vp;
3136 mode_t mode = ap->a_mode;
3137 struct vattr vattr;
40393ded 3138 int i;
984263bc
MD
3139 int error;
3140
3141 /*
3142 * Disallow write attempts on filesystems mounted read-only;
3143 * unless the file is a socket, fifo, or a block or character
3144 * device resident on the filesystem.
3145 */
3146 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3147 switch (vp->v_type) {
3148 case VREG:
3149 case VDIR:
3150 case VLNK:
3151 return (EROFS);
3152 default:
3153 break;
3154 }
3155 }
3156 /*
3157 * If you're the super-user,
3158 * you always get access.
3159 */
3160 if (cred->cr_uid == 0)
3161 return (0);
3162 vap = &vattr;
3b568787 3163 error = VOP_GETATTR(vp, vap, ap->a_td);
984263bc
MD
3164 if (error)
3165 return (error);
3166 /*
3167 * Access check is based on only one of owner, group, public.
3168 * If not owner, then check group. If not a member of the
3169 * group, then check public access.
3170 */
3171 if (cred->cr_uid != vap->va_uid) {
3172 mode >>= 3;
3173 gp = cred->cr_groups;
3174 for (i = 0; i < cred->cr_ngroups; i++, gp++)
3175 if (vap->va_gid == *gp)
3176 goto found;
3177 mode >>= 3;
3178found:
3179 ;
3180 }
3181 error = (vap->va_mode & mode) == mode ? 0 : EACCES;
3182 return (error);
3183}
3184
3185/*
3186 * Read wrapper for special devices.
e851b29e
CP
3187 *
3188 * nfsspec_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3189 * struct ucred *a_cred)
984263bc
MD
3190 */
3191static int
e851b29e 3192nfsspec_read(struct vop_read_args *ap)
984263bc 3193{
40393ded 3194 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3195
3196 /*
3197 * Set access flag.
3198 */
3199 np->n_flag |= NACC;
3200 getnanotime(&np->n_atim);
3201 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap));
3202}
3203
3204/*
3205 * Write wrapper for special devices.
e851b29e
CP
3206 *
3207 * nfsspec_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3208 * struct ucred *a_cred)
984263bc
MD
3209 */
3210static int
e851b29e 3211nfsspec_write(struct vop_write_args *ap)
984263bc 3212{
40393ded 3213 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3214
3215 /*
3216 * Set update flag.
3217 */
3218 np->n_flag |= NUPD;
3219 getnanotime(&np->n_mtim);
3220 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap));
3221}
3222
3223/*
3224 * Close wrapper for special devices.
3225 *
3226 * Update the times on the nfsnode then do device close.
e851b29e
CP
3227 *
3228 * nfsspec_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
3229 * struct thread *a_td)
984263bc
MD
3230 */
3231static int
e851b29e 3232nfsspec_close(struct vop_close_args *ap)
984263bc 3233{
40393ded
RG
3234 struct vnode *vp = ap->a_vp;
3235 struct nfsnode *np = VTONFS(vp);
984263bc
MD
3236 struct vattr vattr;
3237
3238 if (np->n_flag & (NACC | NUPD)) {
3239 np->n_flag |= NCHG;
3240 if (vp->v_usecount == 1 &&
3241 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3242 VATTR_NULL(&vattr);
3243 if (np->n_flag & NACC)
3244 vattr.va_atime = np->n_atim;
3245 if (np->n_flag & NUPD)
3246 vattr.va_mtime = np->n_mtim;
c1cf1e59 3247 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE), ap->a_td);
984263bc
MD
3248 }
3249 }
3250 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap));
3251}
3252
3253/*
3254 * Read wrapper for fifos.
e851b29e
CP
3255 *
3256 * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3257 * struct ucred *a_cred)
984263bc
MD
3258 */
3259static int
e851b29e 3260nfsfifo_read(struct vop_read_args *ap)
984263bc 3261{
40393ded 3262 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3263
3264 /*
3265 * Set access flag.
3266 */
3267 np->n_flag |= NACC;
3268 getnanotime(&np->n_atim);
3269 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap));
3270}
3271
3272/*
3273 * Write wrapper for fifos.
e851b29e
CP
3274 *
3275 * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3276 * struct ucred *a_cred)
984263bc
MD
3277 */
3278static int
e851b29e 3279nfsfifo_write(struct vop_write_args *ap)
984263bc 3280{
40393ded 3281 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3282
3283 /*
3284 * Set update flag.
3285 */
3286 np->n_flag |= NUPD;
3287 getnanotime(&np->n_mtim);
3288 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap));
3289}
3290
3291/*
3292 * Close wrapper for fifos.
3293 *
3294 * Update the times on the nfsnode then do fifo close.
e851b29e
CP
3295 *
3296 * nfsfifo_close(struct vnode *a_vp, int a_fflag, struct thread *a_td)
984263bc
MD
3297 */
3298static int
e851b29e 3299nfsfifo_close(struct vop_close_args *ap)
984263bc 3300{
40393ded
RG
3301 struct vnode *vp = ap->a_vp;
3302 struct nfsnode *np = VTONFS(vp);
984263bc
MD
3303 struct vattr vattr;
3304 struct timespec ts;
3305
3306 if (np->n_flag & (NACC | NUPD)) {
3307 getnanotime(&ts);
3308 if (np->n_flag & NACC)
3309 np->n_atim = ts;
3310 if (np->n_flag & NUPD)
3311 np->n_mtim = ts;
3312 np->n_flag |= NCHG;
3313 if (vp->v_usecount == 1 &&
3314 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3315 VATTR_NULL(&vattr);
3316 if (np->n_flag & NACC)
3317 vattr.va_atime = np->n_atim;
3318 if (np->n_flag & NUPD)
3319 vattr.va_mtime = np->n_mtim;
c1cf1e59 3320 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE), ap->a_td);
984263bc
MD
3321 }
3322 }
3323 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap));
3324}
3325