Add an installer-fetchpkgs target and other related stuff to reduce the
[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 $
2d3e977e 38 * $DragonFly: src/sys/vfs/nfs/nfs_vnops.c,v 1.26 2004/08/13 17:51:12 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 */
2d3e977e 141struct vop_ops *nfsv2_vnode_vops;
984263bc 142static struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = {
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143 { &vop_default_desc, vop_defaultop },
144 { &vop_access_desc, (void *) nfs_access },
145 { &vop_advlock_desc, (void *) nfs_advlock },
146 { &vop_bmap_desc, (void *) nfs_bmap },
147 { &vop_bwrite_desc, (void *) nfs_bwrite },
148 { &vop_close_desc, (void *) nfs_close },
149 { &vop_create_desc, (void *) nfs_create },
150 { &vop_fsync_desc, (void *) nfs_fsync },
151 { &vop_getattr_desc, (void *) nfs_getattr },
152 { &vop_getpages_desc, (void *) nfs_getpages },
153 { &vop_putpages_desc, (void *) nfs_putpages },
154 { &vop_inactive_desc, (void *) nfs_inactive },
155 { &vop_islocked_desc, (void *) vop_stdislocked },
156 { &vop_lease_desc, vop_null },
157 { &vop_link_desc, (void *) nfs_link },
158 { &vop_lock_desc, (void *) vop_sharedlock },
159 { &vop_lookup_desc, (void *) nfs_lookup },
160 { &vop_mkdir_desc, (void *) nfs_mkdir },
161 { &vop_mknod_desc, (void *) nfs_mknod },
162 { &vop_mmap_desc, (void *) nfs_mmap },
163 { &vop_open_desc, (void *) nfs_open },
164 { &vop_poll_desc, (void *) nfs_poll },
165 { &vop_print_desc, (void *) nfs_print },
166 { &vop_read_desc, (void *) nfs_read },
167 { &vop_readdir_desc, (void *) nfs_readdir },
168 { &vop_readlink_desc, (void *) nfs_readlink },
169 { &vop_reclaim_desc, (void *) nfs_reclaim },
170 { &vop_remove_desc, (void *) nfs_remove },
171 { &vop_rename_desc, (void *) nfs_rename },
172 { &vop_rmdir_desc, (void *) nfs_rmdir },
173 { &vop_setattr_desc, (void *) nfs_setattr },
174 { &vop_strategy_desc, (void *) nfs_strategy },
175 { &vop_symlink_desc, (void *) nfs_symlink },
176 { &vop_unlock_desc, (void *) vop_stdunlock },
177 { &vop_write_desc, (void *) nfs_write },
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178 { NULL, NULL }
179};
180static struct vnodeopv_desc nfsv2_vnodeop_opv_desc =
2d3e977e 181 { &nfsv2_vnode_vops, nfsv2_vnodeop_entries };
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182VNODEOP_SET(nfsv2_vnodeop_opv_desc);
183
184/*
185 * Special device vnode ops
186 */
2d3e977e 187struct vop_ops *spec_nfsv2node_vops;
984263bc 188static struct vnodeopv_entry_desc nfsv2_specop_entries[] = {
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189 { &vop_default_desc, (void *) spec_vnoperate },
190 { &vop_access_desc, (void *) nfsspec_access },
191 { &vop_close_desc, (void *) nfsspec_close },
192 { &vop_fsync_desc, (void *) nfs_fsync },
193 { &vop_getattr_desc, (void *) nfs_getattr },
194 { &vop_inactive_desc, (void *) nfs_inactive },
195 { &vop_islocked_desc, (void *) vop_stdislocked },
196 { &vop_lock_desc, (void *) vop_sharedlock },
197 { &vop_print_desc, (void *) nfs_print },
198 { &vop_read_desc, (void *) nfsspec_read },
199 { &vop_reclaim_desc, (void *) nfs_reclaim },
200 { &vop_setattr_desc, (void *) nfs_setattr },
201 { &vop_unlock_desc, (void *) vop_stdunlock },
202 { &vop_write_desc, (void *) nfsspec_write },
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203 { NULL, NULL }
204};
205static struct vnodeopv_desc spec_nfsv2nodeop_opv_desc =
2d3e977e 206 { &spec_nfsv2node_vops, nfsv2_specop_entries };
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207VNODEOP_SET(spec_nfsv2nodeop_opv_desc);
208
2d3e977e 209struct vop_ops *fifo_nfsv2node_vops;
984263bc 210static struct vnodeopv_entry_desc nfsv2_fifoop_entries[] = {
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211 { &vop_default_desc, (void *) fifo_vnoperate },
212 { &vop_access_desc, (void *) nfsspec_access },
213 { &vop_close_desc, (void *) nfsfifo_close },
214 { &vop_fsync_desc, (void *) nfs_fsync },
215 { &vop_getattr_desc, (void *) nfs_getattr },
216 { &vop_inactive_desc, (void *) nfs_inactive },
217 { &vop_islocked_desc, (void *) vop_stdislocked },
218 { &vop_lock_desc, (void *) vop_sharedlock },
219 { &vop_print_desc, (void *) nfs_print },
220 { &vop_read_desc, (void *) nfsfifo_read },
221 { &vop_reclaim_desc, (void *) nfs_reclaim },
222 { &vop_setattr_desc, (void *) nfs_setattr },
223 { &vop_unlock_desc, (void *) vop_stdunlock },
224 { &vop_write_desc, (void *) nfsfifo_write },
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225 { NULL, NULL }
226};
227static struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc =
2d3e977e 228 { &fifo_nfsv2node_vops, nfsv2_fifoop_entries };
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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 778 struct nfsv2_sattr *sp;
999914df 779 struct nfsnode *np = VTONFS(vp);
40393ded
RG
780 caddr_t cp;
781 int32_t t1, t2;
984263bc
MD
782 caddr_t bpos, dpos, cp2;
783 u_int32_t *tl;
784 int error = 0, wccflag = NFSV3_WCCRATTR;
785 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
786 int v3 = NFS_ISV3(vp);
787
788 nfsstats.rpccnt[NFSPROC_SETATTR]++;
789 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3));
790 nfsm_fhtom(vp, v3);
791 if (v3) {
792 nfsm_v3attrbuild(vap, TRUE);
793 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
794 *tl = nfs_false;
795 } else {
796 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
797 if (vap->va_mode == (mode_t)VNOVAL)
798 sp->sa_mode = nfs_xdrneg1;
799 else
800 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
801 if (vap->va_uid == (uid_t)VNOVAL)
802 sp->sa_uid = nfs_xdrneg1;
803 else
804 sp->sa_uid = txdr_unsigned(vap->va_uid);
805 if (vap->va_gid == (gid_t)VNOVAL)
806 sp->sa_gid = nfs_xdrneg1;
807 else
808 sp->sa_gid = txdr_unsigned(vap->va_gid);
809 sp->sa_size = txdr_unsigned(vap->va_size);
810 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
811 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
812 }
dadab5e9 813 nfsm_request(vp, NFSPROC_SETATTR, td, cred);
984263bc 814 if (v3) {
999914df 815 np->n_modestamp = 0;
984263bc
MD
816 nfsm_wcc_data(vp, wccflag);
817 } else
818 nfsm_loadattr(vp, (struct vattr *)0);
6b08710e
MD
819 m_freem(mrep);
820nfsmout:
984263bc
MD
821 return (error);
822}
823
824/*
4d17b298 825 * 'cached' nfs directory lookup
e851b29e
CP
826 *
827 * nfs_lookup(struct vnodeop_desc *a_desc, struct vnode *a_dvp,
828 * struct vnode **a_vpp, struct componentname *a_cnp)
984263bc
MD
829 */
830static int
e851b29e 831nfs_lookup(struct vop_lookup_args *ap)
984263bc
MD
832{
833 struct componentname *cnp = ap->a_cnp;
834 struct vnode *dvp = ap->a_dvp;
835 struct vnode **vpp = ap->a_vpp;
836 int flags = cnp->cn_flags;
837 struct vnode *newvp;
838 u_int32_t *tl;
839 caddr_t cp;
840 int32_t t1, t2;
841 struct nfsmount *nmp;
842 caddr_t bpos, dpos, cp2;
843 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
844 long len;
845 nfsfh_t *fhp;
846 struct nfsnode *np;
847 int lockparent, wantparent, error = 0, attrflag, fhsize;
848 int v3 = NFS_ISV3(dvp);
dadab5e9 849 struct thread *td = cnp->cn_td;
984263bc 850
4d17b298
MD
851 /*
852 * Read-only mount check and directory check.
853 */
984263bc 854 *vpp = NULLVP;
2b69e610
MD
855 if ((flags & CNP_ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
856 (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME))
984263bc 857 return (EROFS);
4d17b298 858
984263bc
MD
859 if (dvp->v_type != VDIR)
860 return (ENOTDIR);
4d17b298
MD
861
862 /*
863 * Look it up in the cache. Note that ENOENT is only returned if we
864 * previously entered a negative hit (see later on). The additional
865 * nfsneg_cache_timeout check causes previously cached results to
866 * be instantly ignored if the negative caching is turned off.
867 */
2b69e610
MD
868 lockparent = flags & CNP_LOCKPARENT;
869 wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT);
984263bc
MD
870 nmp = VFSTONFS(dvp->v_mount);
871 np = VTONFS(dvp);
4d17b298
MD
872 error = cache_lookup(dvp, NCPNULL, vpp, NCPPNULL, cnp);
873 if (error != 0) {
984263bc
MD
874 struct vattr vattr;
875 int vpid;
876
4d17b298
MD
877 if (error == ENOENT && nfsneg_cache_timeout) {
878 *vpp = NULLVP;
879 return (error);
880 }
dadab5e9 881 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0) {
984263bc
MD
882 *vpp = NULLVP;
883 return (error);
884 }
885
886 newvp = *vpp;
887 vpid = newvp->v_id;
888 /*
889 * See the comment starting `Step through' in ufs/ufs_lookup.c
890 * for an explanation of the locking protocol
891 */
892 if (dvp == newvp) {
597aea93 893 vref(newvp);
984263bc 894 error = 0;
2b69e610 895 } else if (flags & CNP_ISDOTDOT) {
41a01a4d
MD
896 VOP_UNLOCK(dvp, NULL, 0, td);
897 error = vget(newvp, NULL, LK_EXCLUSIVE, td);
2b69e610 898 if (!error && lockparent && (flags & CNP_ISLASTCN))
41a01a4d 899 error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td);
984263bc 900 } else {
41a01a4d 901 error = vget(newvp, NULL, LK_EXCLUSIVE, td);
2b69e610 902 if (!lockparent || error || !(flags & CNP_ISLASTCN))
41a01a4d 903 VOP_UNLOCK(dvp, NULL, 0, td);
984263bc
MD
904 }
905 if (!error) {
906 if (vpid == newvp->v_id) {
3b568787 907 if (!VOP_GETATTR(newvp, &vattr, td)
984263bc
MD
908 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) {
909 nfsstats.lookupcache_hits++;
2b69e610
MD
910 if (cnp->cn_nameiop != NAMEI_LOOKUP &&
911 (flags & CNP_ISLASTCN))
912 cnp->cn_flags |= CNP_SAVENAME;
984263bc
MD
913 return (0);
914 }
915 cache_purge(newvp);
916 }
917 vput(newvp);
2b69e610 918 if (lockparent && dvp != newvp && (flags & CNP_ISLASTCN))
41a01a4d 919 VOP_UNLOCK(dvp, NULL, 0, td);
984263bc 920 }
41a01a4d 921 error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td);
984263bc
MD
922 *vpp = NULLVP;
923 if (error)
924 return (error);
925 }
4d17b298
MD
926
927 /*
928 * Cache miss, go the wire.
929 */
984263bc
MD
930 error = 0;
931 newvp = NULLVP;
932 nfsstats.lookupcache_misses++;
933 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
934 len = cnp->cn_namelen;
935 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
936 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
937 nfsm_fhtom(dvp, v3);
938 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
dadab5e9 939 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_td, cnp->cn_cred);
984263bc 940 if (error) {
4d17b298
MD
941 /*
942 * Cache negatve lookups to reduce NFS traffic, but use
943 * a fast timeout.
944 */
945 if (error == ENOENT &&
946 (cnp->cn_flags & CNP_MAKEENTRY) &&
947 cnp->cn_nameiop == NAMEI_LOOKUP &&
948 nfsneg_cache_timeout) {
949 int toval = nfsneg_cache_timeout * hz;
950 if (cnp->cn_flags & CNP_CACHETIMEOUT) {
951 if (cnp->cn_timeout > toval)
952 cnp->cn_timeout = toval;
953 } else {
954 cnp->cn_flags |= CNP_CACHETIMEOUT;
955 cnp->cn_timeout = toval;
956 }
957 cache_enter(dvp, NCPNULL, NULL, cnp);
958 }
984263bc
MD
959 nfsm_postop_attr(dvp, attrflag);
960 m_freem(mrep);
961 goto nfsmout;
962 }
963 nfsm_getfh(fhp, fhsize, v3);
964
965 /*
966 * Handle RENAME case...
967 */
2b69e610 968 if (cnp->cn_nameiop == NAMEI_RENAME && wantparent && (flags & CNP_ISLASTCN)) {
984263bc
MD
969 if (NFS_CMPFH(np, fhp, fhsize)) {
970 m_freem(mrep);
971 return (EISDIR);
972 }
973 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
974 if (error) {
975 m_freem(mrep);
976 return (error);
977 }
978 newvp = NFSTOV(np);
979 if (v3) {
980 nfsm_postop_attr(newvp, attrflag);
981 nfsm_postop_attr(dvp, attrflag);
982 } else
983 nfsm_loadattr(newvp, (struct vattr *)0);
984 *vpp = newvp;
985 m_freem(mrep);
2b69e610 986 cnp->cn_flags |= CNP_SAVENAME;
984263bc 987 if (!lockparent)
41a01a4d 988 VOP_UNLOCK(dvp, NULL, 0, td);
984263bc
MD
989 return (0);
990 }
991
2b69e610 992 if (flags & CNP_ISDOTDOT) {
41a01a4d 993 VOP_UNLOCK(dvp, NULL, 0, td);
984263bc
MD
994 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
995 if (error) {
41a01a4d 996 vn_lock(dvp, NULL, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
997 return (error);
998 }
999 newvp = NFSTOV(np);
2b69e610 1000 if (lockparent && (flags & CNP_ISLASTCN) &&
41a01a4d 1001 (error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td))) {
984263bc
MD
1002 vput(newvp);
1003 return (error);
1004 }
1005 } else if (NFS_CMPFH(np, fhp, fhsize)) {
597aea93 1006 vref(dvp);
984263bc
MD
1007 newvp = dvp;
1008 } else {
1009 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1010 if (error) {
1011 m_freem(mrep);
1012 return (error);
1013 }
2b69e610 1014 if (!lockparent || !(flags & CNP_ISLASTCN))
41a01a4d 1015 VOP_UNLOCK(dvp, NULL, 0, td);
984263bc
MD
1016 newvp = NFSTOV(np);
1017 }
1018 if (v3) {
1019 nfsm_postop_attr(newvp, attrflag);
1020 nfsm_postop_attr(dvp, attrflag);
1021 } else
1022 nfsm_loadattr(newvp, (struct vattr *)0);
2b69e610
MD
1023 if (cnp->cn_nameiop != NAMEI_LOOKUP && (flags & CNP_ISLASTCN))
1024 cnp->cn_flags |= CNP_SAVENAME;
1025 if ((cnp->cn_flags & CNP_MAKEENTRY) &&
1026 (cnp->cn_nameiop != NAMEI_DELETE || !(flags & CNP_ISLASTCN))) {
984263bc 1027 np->n_ctime = np->n_vattr.va_ctime.tv_sec;
bc0c094e 1028 cache_enter(dvp, NCPNULL, newvp, cnp);
984263bc
MD
1029 }
1030 *vpp = newvp;
6b08710e
MD
1031 m_freem(mrep);
1032nfsmout:
984263bc
MD
1033 if (error) {
1034 if (newvp != NULLVP) {
1035 vrele(newvp);
1036 *vpp = NULLVP;
1037 }
2b69e610
MD
1038 if ((cnp->cn_nameiop == NAMEI_CREATE || cnp->cn_nameiop == NAMEI_RENAME) &&
1039 (flags & CNP_ISLASTCN) && error == ENOENT) {
984263bc 1040 if (!lockparent)
41a01a4d 1041 VOP_UNLOCK(dvp, NULL, 0, td);
984263bc
MD
1042 if (dvp->v_mount->mnt_flag & MNT_RDONLY)
1043 error = EROFS;
1044 else
1045 error = EJUSTRETURN;
1046 }
2b69e610
MD
1047 if (cnp->cn_nameiop != NAMEI_LOOKUP && (flags & CNP_ISLASTCN))
1048 cnp->cn_flags |= CNP_SAVENAME;
984263bc
MD
1049 }
1050 return (error);
1051}
1052
1053/*
1054 * nfs read call.
1055 * Just call nfs_bioread() to do the work.
e851b29e
CP
1056 *
1057 * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1058 * struct ucred *a_cred)
984263bc
MD
1059 */
1060static int
e851b29e 1061nfs_read(struct vop_read_args *ap)
984263bc 1062{
40393ded 1063 struct vnode *vp = ap->a_vp;
984263bc 1064
3b568787 1065 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
ca3a2b2f
HP
1066 switch (vp->v_type) {
1067 case VREG:
1068 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
1069 case VDIR:
1070 return (EISDIR);
1071 default:
1072 return EOPNOTSUPP;
1073 }
984263bc
MD
1074}
1075
1076/*
1077 * nfs readlink call
e851b29e
CP
1078 *
1079 * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
984263bc
MD
1080 */
1081static int
e851b29e 1082nfs_readlink(struct vop_readlink_args *ap)
984263bc 1083{
40393ded 1084 struct vnode *vp = ap->a_vp;
984263bc
MD
1085
1086 if (vp->v_type != VLNK)
1087 return (EINVAL);
3b568787 1088 return (nfs_bioread(vp, ap->a_uio, 0));
984263bc
MD
1089}
1090
1091/*
1092 * Do a readlink rpc.
1093 * Called by nfs_doio() from below the buffer cache.
1094 */
1095int
3b568787 1096nfs_readlinkrpc(struct vnode *vp, struct uio *uiop)
984263bc 1097{
40393ded
RG
1098 u_int32_t *tl;
1099 caddr_t cp;
1100 int32_t t1, t2;
984263bc
MD
1101 caddr_t bpos, dpos, cp2;
1102 int error = 0, len, attrflag;
1103 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1104 int v3 = NFS_ISV3(vp);
1105
1106 nfsstats.rpccnt[NFSPROC_READLINK]++;
1107 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3));
1108 nfsm_fhtom(vp, v3);
c1cf1e59 1109 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_td, nfs_vpcred(vp, ND_CHECK));
984263bc
MD
1110 if (v3)
1111 nfsm_postop_attr(vp, attrflag);
1112 if (!error) {
1113 nfsm_strsiz(len, NFS_MAXPATHLEN);
1114 if (len == NFS_MAXPATHLEN) {
1115 struct nfsnode *np = VTONFS(vp);
1116 if (np->n_size && np->n_size < NFS_MAXPATHLEN)
1117 len = np->n_size;
1118 }
1119 nfsm_mtouio(uiop, len);
1120 }
6b08710e
MD
1121 m_freem(mrep);
1122nfsmout:
984263bc
MD
1123 return (error);
1124}
1125
1126/*
1127 * nfs read rpc call
1128 * Ditto above
1129 */
1130int
3b568787 1131nfs_readrpc(struct vnode *vp, struct uio *uiop)
984263bc 1132{
40393ded
RG
1133 u_int32_t *tl;
1134 caddr_t cp;
1135 int32_t t1, t2;
984263bc
MD
1136 caddr_t bpos, dpos, cp2;
1137 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1138 struct nfsmount *nmp;
1139 int error = 0, len, retlen, tsiz, eof, attrflag;
1140 int v3 = NFS_ISV3(vp);
1141
1142#ifndef nolint
1143 eof = 0;
1144#endif
1145 nmp = VFSTONFS(vp->v_mount);
1146 tsiz = uiop->uio_resid;
1147 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1148 return (EFBIG);
1149 while (tsiz > 0) {
1150 nfsstats.rpccnt[NFSPROC_READ]++;
1151 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
1152 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3);
1153 nfsm_fhtom(vp, v3);
1154 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3);
1155 if (v3) {
1156 txdr_hyper(uiop->uio_offset, tl);
1157 *(tl + 2) = txdr_unsigned(len);
1158 } else {
1159 *tl++ = txdr_unsigned(uiop->uio_offset);
1160 *tl++ = txdr_unsigned(len);
1161 *tl = 0;
1162 }
c1cf1e59 1163 nfsm_request(vp, NFSPROC_READ, uiop->uio_td, nfs_vpcred(vp, ND_READ));
984263bc
MD
1164 if (v3) {
1165 nfsm_postop_attr(vp, attrflag);
1166 if (error) {
1167 m_freem(mrep);
1168 goto nfsmout;
1169 }
1170 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1171 eof = fxdr_unsigned(int, *(tl + 1));
1172 } else
1173 nfsm_loadattr(vp, (struct vattr *)0);
1174 nfsm_strsiz(retlen, nmp->nm_rsize);
1175 nfsm_mtouio(uiop, retlen);
1176 m_freem(mrep);
1177 tsiz -= retlen;
1178 if (v3) {
1179 if (eof || retlen == 0) {
1180 tsiz = 0;
1181 }
1182 } else if (retlen < len) {
1183 tsiz = 0;
1184 }
1185 }
1186nfsmout:
1187 return (error);
1188}
1189
1190/*
1191 * nfs write call
1192 */
1193int
e851b29e 1194nfs_writerpc(struct vnode *vp, struct uio *uiop, int *iomode, int *must_commit)
984263bc 1195{
40393ded
RG
1196 u_int32_t *tl;
1197 caddr_t cp;
1198 int32_t t1, t2, backup;
984263bc
MD
1199 caddr_t bpos, dpos, cp2;
1200 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1201 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1202 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
1203 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC;
1204
1205#ifndef DIAGNOSTIC
1206 if (uiop->uio_iovcnt != 1)
1207 panic("nfs: writerpc iovcnt > 1");
1208#endif
1209 *must_commit = 0;
1210 tsiz = uiop->uio_resid;
1211 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1212 return (EFBIG);
1213 while (tsiz > 0) {
1214 nfsstats.rpccnt[NFSPROC_WRITE]++;
1215 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1216 nfsm_reqhead(vp, NFSPROC_WRITE,
1217 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len));
1218 nfsm_fhtom(vp, v3);
1219 if (v3) {
1220 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
1221 txdr_hyper(uiop->uio_offset, tl);
1222 tl += 2;
1223 *tl++ = txdr_unsigned(len);
1224 *tl++ = txdr_unsigned(*iomode);
1225 *tl = txdr_unsigned(len);
1226 } else {
40393ded 1227 u_int32_t x;
984263bc
MD
1228
1229 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1230 /* Set both "begin" and "current" to non-garbage. */
1231 x = txdr_unsigned((u_int32_t)uiop->uio_offset);
1232 *tl++ = x; /* "begin offset" */
1233 *tl++ = x; /* "current offset" */
1234 x = txdr_unsigned(len);
1235 *tl++ = x; /* total to this offset */
1236 *tl = x; /* size of this write */
1237 }
1238 nfsm_uiotom(uiop, len);
c1cf1e59 1239 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_td, nfs_vpcred(vp, ND_WRITE));
984263bc
MD
1240 if (v3) {
1241 wccflag = NFSV3_WCCCHK;
1242 nfsm_wcc_data(vp, wccflag);
1243 if (!error) {
1244 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
1245 + NFSX_V3WRITEVERF);
1246 rlen = fxdr_unsigned(int, *tl++);
1247 if (rlen == 0) {
1248 error = NFSERR_IO;
1249 m_freem(mrep);
1250 break;
1251 } else if (rlen < len) {
1252 backup = len - rlen;
1253 uiop->uio_iov->iov_base -= backup;
1254 uiop->uio_iov->iov_len += backup;
1255 uiop->uio_offset -= backup;
1256 uiop->uio_resid += backup;
1257 len = rlen;
1258 }
1259 commit = fxdr_unsigned(int, *tl++);
1260
1261 /*
1262 * Return the lowest committment level
1263 * obtained by any of the RPCs.
1264 */
1265 if (committed == NFSV3WRITE_FILESYNC)
1266 committed = commit;
1267 else if (committed == NFSV3WRITE_DATASYNC &&
1268 commit == NFSV3WRITE_UNSTABLE)
1269 committed = commit;
1270 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){
1271 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1272 NFSX_V3WRITEVERF);
1273 nmp->nm_state |= NFSSTA_HASWRITEVERF;
1274 } else if (bcmp((caddr_t)tl,
1275 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1276 *must_commit = 1;
1277 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1278 NFSX_V3WRITEVERF);
1279 }
1280 }
1281 } else
1282 nfsm_loadattr(vp, (struct vattr *)0);
1283 if (wccflag)
1284 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec;
1285 m_freem(mrep);
1286 if (error)
1287 break;
1288 tsiz -= len;
1289 }
1290nfsmout:
1291 if (vp->v_mount->mnt_flag & MNT_ASYNC)
1292 committed = NFSV3WRITE_FILESYNC;
1293 *iomode = committed;
1294 if (error)
1295 uiop->uio_resid = tsiz;
1296 return (error);
1297}
1298
1299/*
1300 * nfs mknod rpc
1301 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1302 * mode set to specify the file type and the size field for rdev.
1303 */
1304static int
e851b29e
CP
1305nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1306 struct vattr *vap)
984263bc 1307{
40393ded
RG
1308 struct nfsv2_sattr *sp;
1309 u_int32_t *tl;
1310 caddr_t cp;
1311 int32_t t1, t2;
984263bc
MD
1312 struct vnode *newvp = (struct vnode *)0;
1313 struct nfsnode *np = (struct nfsnode *)0;
1314 struct vattr vattr;
1315 char *cp2;
1316 caddr_t bpos, dpos;
1317 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
1318 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1319 u_int32_t rdev;
1320 int v3 = NFS_ISV3(dvp);
1321
1322 if (vap->va_type == VCHR || vap->va_type == VBLK)
1323 rdev = txdr_unsigned(vap->va_rdev);
1324 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1325 rdev = nfs_xdrneg1;
1326 else {
1327 return (EOPNOTSUPP);
1328 }
3b568787 1329 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) {
984263bc
MD
1330 return (error);
1331 }
1332 nfsstats.rpccnt[NFSPROC_MKNOD]++;
1333 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED +
1334 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1335 nfsm_fhtom(dvp, v3);
1336 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1337 if (v3) {
1338 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1339 *tl++ = vtonfsv3_type(vap->va_type);
1340 nfsm_v3attrbuild(vap, FALSE);
1341 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1342 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1343 *tl++ = txdr_unsigned(umajor(vap->va_rdev));
1344 *tl = txdr_unsigned(uminor(vap->va_rdev));
1345 }
1346 } else {
1347 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1348 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1349 sp->sa_uid = nfs_xdrneg1;
1350 sp->sa_gid = nfs_xdrneg1;
1351 sp->sa_size = rdev;
1352 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1353 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1354 }
dadab5e9 1355 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1356 if (!error) {
1357 nfsm_mtofh(dvp, newvp, v3, gotvp);
1358 if (!gotvp) {
1359 if (newvp) {
1360 vput(newvp);
1361 newvp = (struct vnode *)0;
1362 }
1363 error = nfs_lookitup(dvp, cnp->cn_nameptr,
dadab5e9 1364 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
984263bc
MD
1365 if (!error)
1366 newvp = NFSTOV(np);
1367 }
1368 }
1369 if (v3)
1370 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1371 m_freem(mrep);
1372nfsmout:
984263bc
MD
1373 if (error) {
1374 if (newvp)
1375 vput(newvp);
1376 } else {
2b69e610 1377 if (cnp->cn_flags & CNP_MAKEENTRY)
bc0c094e 1378 cache_enter(dvp, NCPNULL, newvp, cnp);
984263bc
MD
1379 *vpp = newvp;
1380 }
1381 VTONFS(dvp)->n_flag |= NMODIFIED;
1382 if (!wccflag)
1383 VTONFS(dvp)->n_attrstamp = 0;
1384 return (error);
1385}
1386
1387/*
1388 * nfs mknod vop
1389 * just call nfs_mknodrpc() to do the work.
e851b29e
CP
1390 *
1391 * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
1392 * struct componentname *a_cnp, struct vattr *a_vap)
984263bc
MD
1393 */
1394/* ARGSUSED */
1395static int
e851b29e 1396nfs_mknod(struct vop_mknod_args *ap)
984263bc
MD
1397{
1398 return nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1399}
1400
1401static u_long create_verf;
1402/*
1403 * nfs file create call
e851b29e
CP
1404 *
1405 * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
1406 * struct componentname *a_cnp, struct vattr *a_vap)
984263bc
MD
1407 */
1408static int
e851b29e 1409nfs_create(struct vop_create_args *ap)
984263bc 1410{
40393ded
RG
1411 struct vnode *dvp = ap->a_dvp;
1412 struct vattr *vap = ap->a_vap;
1413 struct componentname *cnp = ap->a_cnp;
1414 struct nfsv2_sattr *sp;
1415 u_int32_t *tl;
1416 caddr_t cp;
1417 int32_t t1, t2;
984263bc
MD
1418 struct nfsnode *np = (struct nfsnode *)0;
1419 struct vnode *newvp = (struct vnode *)0;
1420 caddr_t bpos, dpos, cp2;
1421 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
1422 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1423 struct vattr vattr;
1424 int v3 = NFS_ISV3(dvp);
1425
1426 /*
1427 * Oops, not for me..
1428 */
1429 if (vap->va_type == VSOCK)
1430 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1431
3b568787 1432 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) {
984263bc
MD
1433 return (error);
1434 }
1435 if (vap->va_vaflags & VA_EXCLUSIVE)
1436 fmode |= O_EXCL;
1437again:
1438 nfsstats.rpccnt[NFSPROC_CREATE]++;
1439 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED +
1440 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1441 nfsm_fhtom(dvp, v3);
1442 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1443 if (v3) {
1444 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1445 if (fmode & O_EXCL) {
1446 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
1447 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF);
1448#ifdef INET
1449 if (!TAILQ_EMPTY(&in_ifaddrhead))
ecd80f47 1450 *tl++ = IA_SIN(TAILQ_FIRST(&in_ifaddrhead))->sin_addr.s_addr;
984263bc
MD
1451 else
1452#endif
1453 *tl++ = create_verf;
1454 *tl = ++create_verf;
1455 } else {
1456 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
1457 nfsm_v3attrbuild(vap, FALSE);
1458 }
1459 } else {
1460 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1461 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1462 sp->sa_uid = nfs_xdrneg1;
1463 sp->sa_gid = nfs_xdrneg1;
1464 sp->sa_size = 0;
1465 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1466 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1467 }
dadab5e9 1468 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1469 if (!error) {
1470 nfsm_mtofh(dvp, newvp, v3, gotvp);
1471 if (!gotvp) {
1472 if (newvp) {
1473 vput(newvp);
1474 newvp = (struct vnode *)0;
1475 }
1476 error = nfs_lookitup(dvp, cnp->cn_nameptr,
dadab5e9 1477 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
984263bc
MD
1478 if (!error)
1479 newvp = NFSTOV(np);
1480 }
1481 }
1482 if (v3)
1483 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1484 m_freem(mrep);
1485nfsmout:
984263bc
MD
1486 if (error) {
1487 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
1488 fmode &= ~O_EXCL;
1489 goto again;
1490 }
1491 if (newvp)
1492 vput(newvp);
1493 } else if (v3 && (fmode & O_EXCL)) {
1494 /*
1495 * We are normally called with only a partially initialized
1496 * VAP. Since the NFSv3 spec says that server may use the
1497 * file attributes to store the verifier, the spec requires
1498 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1499 * in atime, but we can't really assume that all servers will
1500 * so we ensure that our SETATTR sets both atime and mtime.
1501 */
1502 if (vap->va_mtime.tv_sec == VNOVAL)
1503 vfs_timestamp(&vap->va_mtime);
1504 if (vap->va_atime.tv_sec == VNOVAL)
1505 vap->va_atime = vap->va_mtime;
dadab5e9 1506 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td);
984263bc
MD
1507 }
1508 if (!error) {
2b69e610 1509 if (cnp->cn_flags & CNP_MAKEENTRY)
bc0c094e 1510 cache_enter(dvp, NCPNULL, newvp, cnp);
c1cf1e59
MD
1511 /*
1512 * The new np may have enough info for access
1513 * checks, make sure rucred and wucred are
1514 * initialized for read and write rpc's.
1515 */
1516 np = VTONFS(newvp);
1517 if (np->n_rucred == NULL)
1518 np->n_rucred = crhold(cnp->cn_cred);
1519 if (np->n_wucred == NULL)
1520 np->n_wucred = crhold(cnp->cn_cred);
984263bc
MD
1521 *ap->a_vpp = newvp;
1522 }
1523 VTONFS(dvp)->n_flag |= NMODIFIED;
1524 if (!wccflag)
1525 VTONFS(dvp)->n_attrstamp = 0;
1526 return (error);
1527}
1528
1529/*
1530 * nfs file remove call
1531 * To try and make nfs semantics closer to ufs semantics, a file that has
1532 * other processes using the vnode is renamed instead of removed and then
1533 * removed later on the last close.
1534 * - If v_usecount > 1
1535 * If a rename is not already in the works
1536 * call nfs_sillyrename() to set it up
1537 * else
1538 * do the remove rpc
e851b29e
CP
1539 *
1540 * nfs_remove(struct vnodeop_desc *a_desc, struct vnode *a_dvp,
1541 * struct vnode *a_vp, struct componentname *a_cnp)
984263bc
MD
1542 */
1543static int
e851b29e 1544nfs_remove(struct vop_remove_args *ap)
984263bc 1545{
40393ded
RG
1546 struct vnode *vp = ap->a_vp;
1547 struct vnode *dvp = ap->a_dvp;
1548 struct componentname *cnp = ap->a_cnp;
1549 struct nfsnode *np = VTONFS(vp);
984263bc
MD
1550 int error = 0;
1551 struct vattr vattr;
1552
1553#ifndef DIAGNOSTIC
2b69e610 1554 if ((cnp->cn_flags & CNP_HASBUF) == 0)
984263bc
MD
1555 panic("nfs_remove: no name");
1556 if (vp->v_usecount < 1)
1557 panic("nfs_remove: bad v_usecount");
1558#endif
1559 if (vp->v_type == VDIR)
1560 error = EPERM;
1561 else if (vp->v_usecount == 1 || (np->n_sillyrename &&
3b568787 1562 VOP_GETATTR(vp, &vattr, cnp->cn_td) == 0 &&
984263bc
MD
1563 vattr.va_nlink > 1)) {
1564 /*
1565 * Purge the name cache so that the chance of a lookup for
1566 * the name succeeding while the remove is in progress is
1567 * minimized. Without node locking it can still happen, such
1568 * that an I/O op returns ESTALE, but since you get this if
1569 * another host removes the file..
1570 */
1571 cache_purge(vp);
1572 /*
1573 * throw away biocache buffers, mainly to avoid
1574 * unnecessary delayed writes later.
1575 */
3b568787 1576 error = nfs_vinvalbuf(vp, 0, cnp->cn_td, 1);
984263bc
MD
1577 /* Do the rpc */
1578 if (error != EINTR)
1579 error = nfs_removerpc(dvp, cnp->cn_nameptr,
dadab5e9 1580 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td);
984263bc
MD
1581 /*
1582 * Kludge City: If the first reply to the remove rpc is lost..
1583 * the reply to the retransmitted request will be ENOENT
1584 * since the file was in fact removed
1585 * Therefore, we cheat and return success.
1586 */
1587 if (error == ENOENT)
1588 error = 0;
1589 } else if (!np->n_sillyrename)
1590 error = nfs_sillyrename(dvp, vp, cnp);
1591 np->n_attrstamp = 0;
1592 return (error);
1593}
1594
1595/*
1596 * nfs file remove rpc called from nfs_inactive
1597 */
1598int
dadab5e9 1599nfs_removeit(struct sillyrename *sp)
984263bc 1600{
dadab5e9
MD
1601 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen,
1602 sp->s_cred, NULL));
984263bc
MD
1603}
1604
1605/*
1606 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1607 */
1608static int
e851b29e
CP
1609nfs_removerpc(struct vnode *dvp, const char *name, int namelen,
1610 struct ucred *cred, struct thread *td)
984263bc 1611{
40393ded
RG
1612 u_int32_t *tl;
1613 caddr_t cp;
1614 int32_t t1, t2;
984263bc
MD
1615 caddr_t bpos, dpos, cp2;
1616 int error = 0, wccflag = NFSV3_WCCRATTR;
1617 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1618 int v3 = NFS_ISV3(dvp);
1619
1620 nfsstats.rpccnt[NFSPROC_REMOVE]++;
1621 nfsm_reqhead(dvp, NFSPROC_REMOVE,
1622 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1623 nfsm_fhtom(dvp, v3);
1624 nfsm_strtom(name, namelen, NFS_MAXNAMLEN);
dadab5e9 1625 nfsm_request(dvp, NFSPROC_REMOVE, td, cred);
984263bc
MD
1626 if (v3)
1627 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1628 m_freem(mrep);
1629nfsmout:
984263bc
MD
1630 VTONFS(dvp)->n_flag |= NMODIFIED;
1631 if (!wccflag)
1632 VTONFS(dvp)->n_attrstamp = 0;
1633 return (error);
1634}
1635
1636/*
1637 * nfs file rename call
e851b29e
CP
1638 *
1639 * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
1640 * struct componentname *a_fcnp, struct vnode *a_tdvp,
1641 * struct vnode *a_tvp, struct componentname *a_tcnp)
984263bc
MD
1642 */
1643static int
e851b29e 1644nfs_rename(struct vop_rename_args *ap)
984263bc 1645{
40393ded
RG
1646 struct vnode *fvp = ap->a_fvp;
1647 struct vnode *tvp = ap->a_tvp;
1648 struct vnode *fdvp = ap->a_fdvp;
1649 struct vnode *tdvp = ap->a_tdvp;
1650 struct componentname *tcnp = ap->a_tcnp;
1651 struct componentname *fcnp = ap->a_fcnp;
984263bc
MD
1652 int error;
1653
1654#ifndef DIAGNOSTIC
2b69e610
MD
1655 if ((tcnp->cn_flags & CNP_HASBUF) == 0 ||
1656 (fcnp->cn_flags & CNP_HASBUF) == 0)
984263bc
MD
1657 panic("nfs_rename: no name");
1658#endif
1659 /* Check for cross-device rename */
1660 if ((fvp->v_mount != tdvp->v_mount) ||
1661 (tvp && (fvp->v_mount != tvp->v_mount))) {
1662 error = EXDEV;
1663 goto out;
1664 }
1665
1666 /*
1667 * We have to flush B_DELWRI data prior to renaming
1668 * the file. If we don't, the delayed-write buffers
1669 * can be flushed out later after the file has gone stale
1670 * under NFSV3. NFSV2 does not have this problem because
1671 * ( as far as I can tell ) it flushes dirty buffers more
1672 * often.
1673 */
1674
3b568787 1675 VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_td);
984263bc 1676 if (tvp)
3b568787 1677 VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_td);
984263bc
MD
1678
1679 /*
1680 * If the tvp exists and is in use, sillyrename it before doing the
1681 * rename of the new file over it.
1682 * XXX Can't sillyrename a directory.
1683 */
1684 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename &&
1685 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1686 vput(tvp);
1687 tvp = NULL;
1688 }
1689
1690 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1691 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
dadab5e9 1692 tcnp->cn_td);
984263bc
MD
1693
1694 if (fvp->v_type == VDIR) {
1695 if (tvp != NULL && tvp->v_type == VDIR)
1696 cache_purge(tdvp);
1697 cache_purge(fdvp);
1698 }
1699
1700out:
1701 if (tdvp == tvp)
1702 vrele(tdvp);
1703 else
1704 vput(tdvp);
1705 if (tvp)
1706 vput(tvp);
1707 vrele(fdvp);
1708 vrele(fvp);
1709 /*
1710 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1711 */
1712 if (error == ENOENT)
1713 error = 0;
1714 return (error);
1715}
1716
1717/*
1718 * nfs file rename rpc called from nfs_remove() above
1719 */
1720static int
e851b29e
CP
1721nfs_renameit(struct vnode *sdvp, struct componentname *scnp,
1722 struct sillyrename *sp)
984263bc
MD
1723{
1724 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
dadab5e9 1725 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td));
984263bc
MD
1726}
1727
1728/*
1729 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1730 */
1731static int
e851b29e
CP
1732nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen,
1733 struct vnode *tdvp, const char *tnameptr, int tnamelen,
1734 struct ucred *cred, struct thread *td)
984263bc 1735{
40393ded
RG
1736 u_int32_t *tl;
1737 caddr_t cp;
1738 int32_t t1, t2;
984263bc
MD
1739 caddr_t bpos, dpos, cp2;
1740 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
1741 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1742 int v3 = NFS_ISV3(fdvp);
1743
1744 nfsstats.rpccnt[NFSPROC_RENAME]++;
1745 nfsm_reqhead(fdvp, NFSPROC_RENAME,
1746 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) +
1747 nfsm_rndup(tnamelen));
1748 nfsm_fhtom(fdvp, v3);
1749 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN);
1750 nfsm_fhtom(tdvp, v3);
1751 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN);
dadab5e9 1752 nfsm_request(fdvp, NFSPROC_RENAME, td, cred);
984263bc
MD
1753 if (v3) {
1754 nfsm_wcc_data(fdvp, fwccflag);
1755 nfsm_wcc_data(tdvp, twccflag);
1756 }
6b08710e
MD
1757 m_freem(mrep);
1758nfsmout:
984263bc
MD
1759 VTONFS(fdvp)->n_flag |= NMODIFIED;
1760 VTONFS(tdvp)->n_flag |= NMODIFIED;
1761 if (!fwccflag)
1762 VTONFS(fdvp)->n_attrstamp = 0;
1763 if (!twccflag)
1764 VTONFS(tdvp)->n_attrstamp = 0;
1765 return (error);
1766}
1767
1768/*
1769 * nfs hard link create call
e851b29e
CP
1770 *
1771 * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp,
1772 * struct componentname *a_cnp)
984263bc
MD
1773 */
1774static int
e851b29e 1775nfs_link(struct vop_link_args *ap)
984263bc 1776{
40393ded
RG
1777 struct vnode *vp = ap->a_vp;
1778 struct vnode *tdvp = ap->a_tdvp;
1779 struct componentname *cnp = ap->a_cnp;
1780 u_int32_t *tl;
1781 caddr_t cp;
1782 int32_t t1, t2;
984263bc
MD
1783 caddr_t bpos, dpos, cp2;
1784 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
1785 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1786 int v3;
1787
1788 if (vp->v_mount != tdvp->v_mount) {
1789 return (EXDEV);
1790 }
1791
1792 /*
1793 * Push all writes to the server, so that the attribute cache
1794 * doesn't get "out of sync" with the server.
1795 * XXX There should be a better way!
1796 */
3b568787 1797 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_td);
984263bc
MD
1798
1799 v3 = NFS_ISV3(vp);
1800 nfsstats.rpccnt[NFSPROC_LINK]++;
1801 nfsm_reqhead(vp, NFSPROC_LINK,
1802 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
1803 nfsm_fhtom(vp, v3);
1804 nfsm_fhtom(tdvp, v3);
1805 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
dadab5e9 1806 nfsm_request(vp, NFSPROC_LINK, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1807 if (v3) {
1808 nfsm_postop_attr(vp, attrflag);
1809 nfsm_wcc_data(tdvp, wccflag);
1810 }
6b08710e
MD
1811 m_freem(mrep);
1812nfsmout:
984263bc
MD
1813 VTONFS(tdvp)->n_flag |= NMODIFIED;
1814 if (!attrflag)
1815 VTONFS(vp)->n_attrstamp = 0;
1816 if (!wccflag)
1817 VTONFS(tdvp)->n_attrstamp = 0;
1818 /*
1819 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1820 */
1821 if (error == EEXIST)
1822 error = 0;
1823 return (error);
1824}
1825
1826/*
1827 * nfs symbolic link create call
e851b29e
CP
1828 *
1829 * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1830 * struct componentname *a_cnp, struct vattr *a_vap,
1831 * char *a_target)
984263bc
MD
1832 */
1833static int
e851b29e 1834nfs_symlink(struct vop_symlink_args *ap)
984263bc 1835{
40393ded
RG
1836 struct vnode *dvp = ap->a_dvp;
1837 struct vattr *vap = ap->a_vap;
1838 struct componentname *cnp = ap->a_cnp;
1839 struct nfsv2_sattr *sp;
1840 u_int32_t *tl;
1841 caddr_t cp;
1842 int32_t t1, t2;
984263bc
MD
1843 caddr_t bpos, dpos, cp2;
1844 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
1845 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1846 struct vnode *newvp = (struct vnode *)0;
1847 int v3 = NFS_ISV3(dvp);
1848
1849 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1850 slen = strlen(ap->a_target);
1851 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED +
1852 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3));
1853 nfsm_fhtom(dvp, v3);
1854 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1855 if (v3) {
1856 nfsm_v3attrbuild(vap, FALSE);
1857 }
1858 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
1859 if (!v3) {
1860 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1861 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
1862 sp->sa_uid = nfs_xdrneg1;
1863 sp->sa_gid = nfs_xdrneg1;
1864 sp->sa_size = nfs_xdrneg1;
1865 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1866 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1867 }
1868
1869 /*
1870 * Issue the NFS request and get the rpc response.
1871 *
1872 * Only NFSv3 responses returning an error of 0 actually return
1873 * a file handle that can be converted into newvp without having
1874 * to do an extra lookup rpc.
1875 */
dadab5e9 1876 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1877 if (v3) {
1878 if (error == 0)
1879 nfsm_mtofh(dvp, newvp, v3, gotvp);
1880 nfsm_wcc_data(dvp, wccflag);
1881 }
1882
1883 /*
1884 * out code jumps -> here, mrep is also freed.
1885 */
1886
6b08710e
MD
1887 m_freem(mrep);
1888nfsmout:
984263bc
MD
1889
1890 /*
1891 * If we get an EEXIST error, silently convert it to no-error
1892 * in case of an NFS retry.
1893 */
1894 if (error == EEXIST)
1895 error = 0;
1896
1897 /*
1898 * If we do not have (or no longer have) an error, and we could
1899 * not extract the newvp from the response due to the request being
1900 * NFSv2 or the error being EEXIST. We have to do a lookup in order
1901 * to obtain a newvp to return.
1902 */
1903 if (error == 0 && newvp == NULL) {
1904 struct nfsnode *np = NULL;
1905
1906 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
dadab5e9 1907 cnp->cn_cred, cnp->cn_td, &np);
984263bc
MD
1908 if (!error)
1909 newvp = NFSTOV(np);
1910 }
1911 if (error) {
1912 if (newvp)
1913 vput(newvp);
1914 } else {
1915 *ap->a_vpp = newvp;
1916 }
1917 VTONFS(dvp)->n_flag |= NMODIFIED;
1918 if (!wccflag)
1919 VTONFS(dvp)->n_attrstamp = 0;
1920 return (error);
1921}
1922
1923/*
1924 * nfs make dir call
e851b29e
CP
1925 *
1926 * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
1927 * struct componentname *a_cnp, struct vattr *a_vap)
984263bc
MD
1928 */
1929static int
e851b29e 1930nfs_mkdir(struct vop_mkdir_args *ap)
984263bc 1931{
40393ded
RG
1932 struct vnode *dvp = ap->a_dvp;
1933 struct vattr *vap = ap->a_vap;
1934 struct componentname *cnp = ap->a_cnp;
1935 struct nfsv2_sattr *sp;
1936 u_int32_t *tl;
1937 caddr_t cp;
1938 int32_t t1, t2;
1939 int len;
984263bc
MD
1940 struct nfsnode *np = (struct nfsnode *)0;
1941 struct vnode *newvp = (struct vnode *)0;
1942 caddr_t bpos, dpos, cp2;
1943 int error = 0, wccflag = NFSV3_WCCRATTR;
1944 int gotvp = 0;
1945 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1946 struct vattr vattr;
1947 int v3 = NFS_ISV3(dvp);
1948
3b568787 1949 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) {
984263bc
MD
1950 return (error);
1951 }
1952 len = cnp->cn_namelen;
1953 nfsstats.rpccnt[NFSPROC_MKDIR]++;
1954 nfsm_reqhead(dvp, NFSPROC_MKDIR,
1955 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3));
1956 nfsm_fhtom(dvp, v3);
1957 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
1958 if (v3) {
1959 nfsm_v3attrbuild(vap, FALSE);
1960 } else {
1961 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1962 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
1963 sp->sa_uid = nfs_xdrneg1;
1964 sp->sa_gid = nfs_xdrneg1;
1965 sp->sa_size = nfs_xdrneg1;
1966 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1967 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1968 }
dadab5e9 1969 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_td, cnp->cn_cred);
984263bc
MD
1970 if (!error)
1971 nfsm_mtofh(dvp, newvp, v3, gotvp);
1972 if (v3)
1973 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
1974 m_freem(mrep);
1975nfsmout:
984263bc
MD
1976 VTONFS(dvp)->n_flag |= NMODIFIED;
1977 if (!wccflag)
1978 VTONFS(dvp)->n_attrstamp = 0;
1979 /*
1980 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
1981 * if we can succeed in looking up the directory.
1982 */
1983 if (error == EEXIST || (!error && !gotvp)) {
1984 if (newvp) {
1985 vrele(newvp);
1986 newvp = (struct vnode *)0;
1987 }
1988 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
dadab5e9 1989 cnp->cn_td, &np);
984263bc
MD
1990 if (!error) {
1991 newvp = NFSTOV(np);
1992 if (newvp->v_type != VDIR)
1993 error = EEXIST;
1994 }
1995 }
1996 if (error) {
1997 if (newvp)
1998 vrele(newvp);
1999 } else
2000 *ap->a_vpp = newvp;
2001 return (error);
2002}
2003
2004/*
2005 * nfs remove directory call
e851b29e
CP
2006 *
2007 * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
2008 * struct componentname *a_cnp)
984263bc
MD
2009 */
2010static int
e851b29e 2011nfs_rmdir(struct vop_rmdir_args *ap)
984263bc 2012{
40393ded
RG
2013 struct vnode *vp = ap->a_vp;
2014 struct vnode *dvp = ap->a_dvp;
2015 struct componentname *cnp = ap->a_cnp;
2016 u_int32_t *tl;
2017 caddr_t cp;
2018 int32_t t1, t2;
984263bc
MD
2019 caddr_t bpos, dpos, cp2;
2020 int error = 0, wccflag = NFSV3_WCCRATTR;
2021 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2022 int v3 = NFS_ISV3(dvp);
2023
2024 if (dvp == vp)
2025 return (EINVAL);
2026 nfsstats.rpccnt[NFSPROC_RMDIR]++;
2027 nfsm_reqhead(dvp, NFSPROC_RMDIR,
2028 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
2029 nfsm_fhtom(dvp, v3);
2030 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
dadab5e9 2031 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_td, cnp->cn_cred);
984263bc
MD
2032 if (v3)
2033 nfsm_wcc_data(dvp, wccflag);
6b08710e
MD
2034 m_freem(mrep);
2035nfsmout:
984263bc
MD
2036 VTONFS(dvp)->n_flag |= NMODIFIED;
2037 if (!wccflag)
2038 VTONFS(dvp)->n_attrstamp = 0;
2039 cache_purge(dvp);
2040 cache_purge(vp);
2041 /*
2042 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2043 */
2044 if (error == ENOENT)
2045 error = 0;
2046 return (error);
2047}
2048
2049/*
2050 * nfs readdir call
e851b29e
CP
2051 *
2052 * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
984263bc
MD
2053 */
2054static int
e851b29e 2055nfs_readdir(struct vop_readdir_args *ap)
984263bc 2056{
40393ded
RG
2057 struct vnode *vp = ap->a_vp;
2058 struct nfsnode *np = VTONFS(vp);
2059 struct uio *uio = ap->a_uio;
984263bc
MD
2060 int tresid, error;
2061 struct vattr vattr;
2062
2063 if (vp->v_type != VDIR)
2064 return (EPERM);
2065 /*
2066 * First, check for hit on the EOF offset cache
2067 */
2068 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2069 (np->n_flag & NMODIFIED) == 0) {
2070 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) {
2071 if (NQNFS_CKCACHABLE(vp, ND_READ)) {
2072 nfsstats.direofcache_hits++;
2073 return (0);
2074 }
3b568787 2075 } else if (VOP_GETATTR(vp, &vattr, uio->uio_td) == 0 &&
984263bc
MD
2076 np->n_mtime == vattr.va_mtime.tv_sec) {
2077 nfsstats.direofcache_hits++;
2078 return (0);
2079 }
2080 }
2081
2082 /*
2083 * Call nfs_bioread() to do the real work.
2084 */
2085 tresid = uio->uio_resid;
3b568787 2086 error = nfs_bioread(vp, uio, 0);
984263bc
MD
2087
2088 if (!error && uio->uio_resid == tresid)
2089 nfsstats.direofcache_misses++;
2090 return (error);
2091}
2092
2093/*
2094 * Readdir rpc call.
2095 * Called from below the buffer cache by nfs_doio().
2096 */
2097int
3b568787 2098nfs_readdirrpc(struct vnode *vp, struct uio *uiop)
984263bc 2099{
40393ded
RG
2100 int len, left;
2101 struct dirent *dp = NULL;
2102 u_int32_t *tl;
2103 caddr_t cp;
2104 int32_t t1, t2;
2105 nfsuint64 *cookiep;
984263bc
MD
2106 caddr_t bpos, dpos, cp2;
2107 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2108 nfsuint64 cookie;
2109 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2110 struct nfsnode *dnp = VTONFS(vp);
2111 u_quad_t fileno;
2112 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2113 int attrflag;
2114 int v3 = NFS_ISV3(vp);
2115
2116#ifndef DIAGNOSTIC
2117 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2118 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2119 panic("nfs readdirrpc bad uio");
2120#endif
2121
2122 /*
2123 * If there is no cookie, assume directory was stale.
2124 */
2125 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2126 if (cookiep)
2127 cookie = *cookiep;
2128 else
2129 return (NFSERR_BAD_COOKIE);
2130 /*
2131 * Loop around doing readdir rpc's of size nm_readdirsize
2132 * truncated to a multiple of DIRBLKSIZ.
2133 * The stopping criteria is EOF or buffer full.
2134 */
2135 while (more_dirs && bigenough) {
2136 nfsstats.rpccnt[NFSPROC_READDIR]++;
2137 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) +
2138 NFSX_READDIR(v3));
2139 nfsm_fhtom(vp, v3);
2140 if (v3) {
2141 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
2142 *tl++ = cookie.nfsuquad[0];
2143 *tl++ = cookie.nfsuquad[1];
2144 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2145 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2146 } else {
2147 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2148 *tl++ = cookie.nfsuquad[0];
2149 }
2150 *tl = txdr_unsigned(nmp->nm_readdirsize);
c1cf1e59 2151 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_td, nfs_vpcred(vp, ND_READ));
984263bc
MD
2152 if (v3) {
2153 nfsm_postop_attr(vp, attrflag);
2154 if (!error) {
2155 nfsm_dissect(tl, u_int32_t *,
2156 2 * NFSX_UNSIGNED);
2157 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2158 dnp->n_cookieverf.nfsuquad[1] = *tl;
2159 } else {
2160 m_freem(mrep);
2161 goto nfsmout;
2162 }
2163 }
2164 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2165 more_dirs = fxdr_unsigned(int, *tl);
2166
2167 /* loop thru the dir entries, doctoring them to 4bsd form */
2168 while (more_dirs && bigenough) {
2169 if (v3) {
2170 nfsm_dissect(tl, u_int32_t *,
2171 3 * NFSX_UNSIGNED);
2172 fileno = fxdr_hyper(tl);
2173 len = fxdr_unsigned(int, *(tl + 2));
2174 } else {
2175 nfsm_dissect(tl, u_int32_t *,
2176 2 * NFSX_UNSIGNED);
2177 fileno = fxdr_unsigned(u_quad_t, *tl++);
2178 len = fxdr_unsigned(int, *tl);
2179 }
2180 if (len <= 0 || len > NFS_MAXNAMLEN) {
2181 error = EBADRPC;
2182 m_freem(mrep);
2183 goto nfsmout;
2184 }
2185 tlen = nfsm_rndup(len);
2186 if (tlen == len)
2187 tlen += 4; /* To ensure null termination */
2188 left = DIRBLKSIZ - blksiz;
2189 if ((tlen + DIRHDSIZ) > left) {
2190 dp->d_reclen += left;
2191 uiop->uio_iov->iov_base += left;
2192 uiop->uio_iov->iov_len -= left;
2193 uiop->uio_offset += left;
2194 uiop->uio_resid -= left;
2195 blksiz = 0;
2196 }
2197 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2198 bigenough = 0;
2199 if (bigenough) {
2200 dp = (struct dirent *)uiop->uio_iov->iov_base;
2201 dp->d_fileno = (int)fileno;
2202 dp->d_namlen = len;
2203 dp->d_reclen = tlen + DIRHDSIZ;
2204 dp->d_type = DT_UNKNOWN;
2205 blksiz += dp->d_reclen;
2206 if (blksiz == DIRBLKSIZ)
2207 blksiz = 0;
2208 uiop->uio_offset += DIRHDSIZ;
2209 uiop->uio_resid -= DIRHDSIZ;
2210 uiop->uio_iov->iov_base += DIRHDSIZ;
2211 uiop->uio_iov->iov_len -= DIRHDSIZ;
2212 nfsm_mtouio(uiop, len);
2213 cp = uiop->uio_iov->iov_base;
2214 tlen -= len;
2215 *cp = '\0'; /* null terminate */
2216 uiop->uio_iov->iov_base += tlen;
2217 uiop->uio_iov->iov_len -= tlen;
2218 uiop->uio_offset += tlen;
2219 uiop->uio_resid -= tlen;
2220 } else
2221 nfsm_adv(nfsm_rndup(len));
2222 if (v3) {
2223 nfsm_dissect(tl, u_int32_t *,
2224 3 * NFSX_UNSIGNED);
2225 } else {
2226 nfsm_dissect(tl, u_int32_t *,
2227 2 * NFSX_UNSIGNED);
2228 }
2229 if (bigenough) {
2230 cookie.nfsuquad[0] = *tl++;
2231 if (v3)
2232 cookie.nfsuquad[1] = *tl++;
2233 } else if (v3)
2234 tl += 2;
2235 else
2236 tl++;
2237 more_dirs = fxdr_unsigned(int, *tl);
2238 }
2239 /*
2240 * If at end of rpc data, get the eof boolean
2241 */
2242 if (!more_dirs) {
2243 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2244 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2245 }
2246 m_freem(mrep);
2247 }
2248 /*
2249 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2250 * by increasing d_reclen for the last record.
2251 */
2252 if (blksiz > 0) {
2253 left = DIRBLKSIZ - blksiz;
2254 dp->d_reclen += left;
2255 uiop->uio_iov->iov_base += left;
2256 uiop->uio_iov->iov_len -= left;
2257 uiop->uio_offset += left;
2258 uiop->uio_resid -= left;
2259 }
2260
2261 /*
2262 * We are now either at the end of the directory or have filled the
2263 * block.
2264 */
2265 if (bigenough)
2266 dnp->n_direofoffset = uiop->uio_offset;
2267 else {
2268 if (uiop->uio_resid > 0)
2269 printf("EEK! readdirrpc resid > 0\n");
2270 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2271 *cookiep = cookie;
2272 }
2273nfsmout:
2274 return (error);
2275}
2276
2277/*
2278 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2279 */
2280int
3b568787 2281nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop)
984263bc 2282{
40393ded
RG
2283 int len, left;
2284 struct dirent *dp;
2285 u_int32_t *tl;
2286 caddr_t cp;
2287 int32_t t1, t2;
2288 struct vnode *newvp;
2289 nfsuint64 *cookiep;
984263bc
MD
2290 caddr_t bpos, dpos, cp2, dpossav1, dpossav2;
2291 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2;
2292 struct nameidata nami, *ndp = &nami;
2293 struct componentname *cnp = &ndp->ni_cnd;
2294 nfsuint64 cookie;
2295 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2296 struct nfsnode *dnp = VTONFS(vp), *np;
2297 nfsfh_t *fhp;
2298 u_quad_t fileno;
2299 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2300 int attrflag, fhsize;
2301
2302#ifndef nolint
2303 dp = (struct dirent *)0;
2304#endif
2305#ifndef DIAGNOSTIC
2306 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2307 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2308 panic("nfs readdirplusrpc bad uio");
2309#endif
2310 ndp->ni_dvp = vp;
2311 newvp = NULLVP;
2312
2313 /*
2314 * If there is no cookie, assume directory was stale.
2315 */
2316 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2317 if (cookiep)
2318 cookie = *cookiep;
2319 else
2320 return (NFSERR_BAD_COOKIE);
2321 /*
2322 * Loop around doing readdir rpc's of size nm_readdirsize
2323 * truncated to a multiple of DIRBLKSIZ.
2324 * The stopping criteria is EOF or buffer full.
2325 */
2326 while (more_dirs && bigenough) {
2327 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
2328 nfsm_reqhead(vp, NFSPROC_READDIRPLUS,
2329 NFSX_FH(1) + 6 * NFSX_UNSIGNED);
2330 nfsm_fhtom(vp, 1);
2331 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
2332 *tl++ = cookie.nfsuquad[0];
2333 *tl++ = cookie.nfsuquad[1];
2334 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2335 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2336 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2337 *tl = txdr_unsigned(nmp->nm_rsize);
c1cf1e59 2338 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_td, nfs_vpcred(vp, ND_READ));
984263bc
MD
2339 nfsm_postop_attr(vp, attrflag);
2340 if (error) {
2341 m_freem(mrep);
2342 goto nfsmout;
2343 }
2344 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2345 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2346 dnp->n_cookieverf.nfsuquad[1] = *tl++;
2347 more_dirs = fxdr_unsigned(int, *tl);
2348
2349 /* loop thru the dir entries, doctoring them to 4bsd form */
2350 while (more_dirs && bigenough) {
2351 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2352 fileno = fxdr_hyper(tl);
2353 len = fxdr_unsigned(int, *(tl + 2));
2354 if (len <= 0 || len > NFS_MAXNAMLEN) {
2355 error = EBADRPC;
2356 m_freem(mrep);
2357 goto nfsmout;
2358 }
2359 tlen = nfsm_rndup(len);
2360 if (tlen == len)
2361 tlen += 4; /* To ensure null termination*/
2362 left = DIRBLKSIZ - blksiz;
2363 if ((tlen + DIRHDSIZ) > left) {
2364 dp->d_reclen += left;
2365 uiop->uio_iov->iov_base += left;
2366 uiop->uio_iov->iov_len -= left;
2367 uiop->uio_offset += left;
2368 uiop->uio_resid -= left;
2369 blksiz = 0;
2370 }
2371 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2372 bigenough = 0;
2373 if (bigenough) {
2374 dp = (struct dirent *)uiop->uio_iov->iov_base;
2375 dp->d_fileno = (int)fileno;
2376 dp->d_namlen = len;
2377 dp->d_reclen = tlen + DIRHDSIZ;
2378 dp->d_type = DT_UNKNOWN;
2379 blksiz += dp->d_reclen;
2380 if (blksiz == DIRBLKSIZ)
2381 blksiz = 0;
2382 uiop->uio_offset += DIRHDSIZ;
2383 uiop->uio_resid -= DIRHDSIZ;
2384 uiop->uio_iov->iov_base += DIRHDSIZ;
2385 uiop->uio_iov->iov_len -= DIRHDSIZ;
2386 cnp->cn_nameptr = uiop->uio_iov->iov_base;
2387 cnp->cn_namelen = len;
2388 nfsm_mtouio(uiop, len);
2389 cp = uiop->uio_iov->iov_base;
2390 tlen -= len;
2391 *cp = '\0';
2392 uiop->uio_iov->iov_base += tlen;
2393 uiop->uio_iov->iov_len -= tlen;
2394 uiop->uio_offset += tlen;
2395 uiop->uio_resid -= tlen;
2396 } else
2397 nfsm_adv(nfsm_rndup(len));
2398 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2399 if (bigenough) {
2400 cookie.nfsuquad[0] = *tl++;
2401 cookie.nfsuquad[1] = *tl++;
2402 } else
2403 tl += 2;
2404
2405 /*
2406 * Since the attributes are before the file handle
2407 * (sigh), we must skip over the attributes and then
2408 * come back and get them.
2409 */
2410 attrflag = fxdr_unsigned(int, *tl);
2411 if (attrflag) {
2412 dpossav1 = dpos;
2413 mdsav1 = md;
2414 nfsm_adv(NFSX_V3FATTR);
2415 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2416 doit = fxdr_unsigned(int, *tl);
2417 if (doit) {
2418 nfsm_getfh(fhp, fhsize, 1);
2419 if (NFS_CMPFH(dnp, fhp, fhsize)) {
597aea93 2420 vref(vp);
984263bc
MD
2421 newvp = vp;
2422 np = dnp;
2423 } else {
2424 error = nfs_nget(vp->v_mount, fhp,
2425 fhsize, &np);
2426 if (error)
2427 doit = 0;
2428 else
2429 newvp = NFSTOV(np);
2430 }
2431 }
2432 if (doit && bigenough) {
2433 dpossav2 = dpos;
2434 dpos = dpossav1;
2435 mdsav2 = md;
2436 md = mdsav1;
2437 nfsm_loadattr(newvp, (struct vattr *)0);
2438 dpos = dpossav2;
2439 md = mdsav2;
2440 dp->d_type =
2441 IFTODT(VTTOIF(np->n_vattr.va_type));
2442 ndp->ni_vp = newvp;
bc0c094e 2443 cache_enter(ndp->ni_dvp, NCPNULL, ndp->ni_vp, cnp);
984263bc
MD
2444 }
2445 } else {
2446 /* Just skip over the file handle */
2447 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2448 i = fxdr_unsigned(int, *tl);
2449 nfsm_adv(nfsm_rndup(i));
2450 }
2451 if (newvp != NULLVP) {
2452 if (newvp == vp)
2453 vrele(newvp);
2454 else
2455 vput(newvp);
2456 newvp = NULLVP;
2457 }
2458 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2459 more_dirs = fxdr_unsigned(int, *tl);
2460 }
2461 /*
2462 * If at end of rpc data, get the eof boolean
2463 */
2464 if (!more_dirs) {
2465 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2466 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2467 }
2468 m_freem(mrep);
2469 }
2470 /*
2471 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2472 * by increasing d_reclen for the last record.
2473 */
2474 if (blksiz > 0) {
2475 left = DIRBLKSIZ - blksiz;
2476 dp->d_reclen += left;
2477 uiop->uio_iov->iov_base += left;
2478 uiop->uio_iov->iov_len -= left;
2479 uiop->uio_offset += left;
2480 uiop->uio_resid -= left;
2481 }
2482
2483 /*
2484 * We are now either at the end of the directory or have filled the
2485 * block.
2486 */
2487 if (bigenough)
2488 dnp->n_direofoffset = uiop->uio_offset;
2489 else {
2490 if (uiop->uio_resid > 0)
2491 printf("EEK! readdirplusrpc resid > 0\n");
2492 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2493 *cookiep = cookie;
2494 }
2495nfsmout:
2496 if (newvp != NULLVP) {
2497 if (newvp == vp)
2498 vrele(newvp);
2499 else
2500 vput(newvp);
2501 newvp = NULLVP;
2502 }
2503 return (error);
2504}
2505
2506/*
2507 * Silly rename. To make the NFS filesystem that is stateless look a little
2508 * more like the "ufs" a remove of an active vnode is translated to a rename
2509 * to a funny looking filename that is removed by nfs_inactive on the
2510 * nfsnode. There is the potential for another process on a different client
2511 * to create the same funny name between the nfs_lookitup() fails and the
2512 * nfs_rename() completes, but...
2513 */
2514static int
e851b29e 2515nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
984263bc 2516{
40393ded 2517 struct sillyrename *sp;
984263bc
MD
2518 struct nfsnode *np;
2519 int error;
984263bc
MD
2520
2521 cache_purge(dvp);
2522 np = VTONFS(vp);
2523#ifndef DIAGNOSTIC
2524 if (vp->v_type == VDIR)
2525 panic("nfs: sillyrename dir");
2526#endif
2527 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2528 M_NFSREQ, M_WAITOK);
2529 sp->s_cred = crdup(cnp->cn_cred);
2530 sp->s_dvp = dvp;
597aea93 2531 vref(dvp);
984263bc
MD
2532
2533 /* Fudge together a funny name */
dadab5e9 2534 sp->s_namlen = sprintf(sp->s_name, ".nfsA%08x4.4", (int)cnp->cn_td);
984263bc
MD
2535
2536 /* Try lookitups until we get one that isn't there */
2537 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
dadab5e9 2538 cnp->cn_td, (struct nfsnode **)0) == 0) {
984263bc
MD
2539 sp->s_name[4]++;
2540 if (sp->s_name[4] > 'z') {
2541 error = EINVAL;
2542 goto bad;
2543 }
2544 }
2545 error = nfs_renameit(dvp, cnp, sp);
2546 if (error)
2547 goto bad;
2548 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
dadab5e9 2549 cnp->cn_td, &np);
984263bc
MD
2550 np->n_sillyrename = sp;
2551 return (0);
2552bad:
2553 vrele(sp->s_dvp);
2554 crfree(sp->s_cred);
2555 free((caddr_t)sp, M_NFSREQ);
2556 return (error);
2557}
2558
2559/*
2560 * Look up a file name and optionally either update the file handle or
2561 * allocate an nfsnode, depending on the value of npp.
2562 * npp == NULL --> just do the lookup
2563 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2564 * handled too
2565 * *npp != NULL --> update the file handle in the vnode
2566 */
2567static int
e851b29e
CP
2568nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred,
2569 struct thread *td, struct nfsnode **npp)
984263bc 2570{
40393ded
RG
2571 u_int32_t *tl;
2572 caddr_t cp;
2573 int32_t t1, t2;
984263bc
MD
2574 struct vnode *newvp = (struct vnode *)0;
2575 struct nfsnode *np, *dnp = VTONFS(dvp);
2576 caddr_t bpos, dpos, cp2;
2577 int error = 0, fhlen, attrflag;
2578 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2579 nfsfh_t *nfhp;
2580 int v3 = NFS_ISV3(dvp);
2581
2582 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
2583 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
2584 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2585 nfsm_fhtom(dvp, v3);
2586 nfsm_strtom(name, len, NFS_MAXNAMLEN);
dadab5e9 2587 nfsm_request(dvp, NFSPROC_LOOKUP, td, cred);
984263bc
MD
2588 if (npp && !error) {
2589 nfsm_getfh(nfhp, fhlen, v3);
2590 if (*npp) {
2591 np = *npp;
2592 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2593 free((caddr_t)np->n_fhp, M_NFSBIGFH);
2594 np->n_fhp = &np->n_fh;
2595 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2596 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK);
2597 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2598 np->n_fhsize = fhlen;
2599 newvp = NFSTOV(np);
2600 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
597aea93 2601 vref(dvp);
984263bc
MD
2602 newvp = dvp;
2603 } else {
2604 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
2605 if (error) {
2606 m_freem(mrep);
2607 return (error);
2608 }
2609 newvp = NFSTOV(np);
2610 }
2611 if (v3) {
2612 nfsm_postop_attr(newvp, attrflag);
2613 if (!attrflag && *npp == NULL) {
2614 m_freem(mrep);
2615 if (newvp == dvp)
2616 vrele(newvp);
2617 else
2618 vput(newvp);
2619 return (ENOENT);
2620 }
2621 } else
2622 nfsm_loadattr(newvp, (struct vattr *)0);
2623 }
6b08710e
MD
2624 m_freem(mrep);
2625nfsmout:
984263bc
MD
2626 if (npp && *npp == NULL) {
2627 if (error) {
2628 if (newvp) {
2629 if (newvp == dvp)
2630 vrele(newvp);
2631 else
2632 vput(newvp);
2633 }
2634 } else
2635 *npp = np;
2636 }
2637 return (error);
2638}
2639
2640/*
2641 * Nfs Version 3 commit rpc
2642 */
2643int
3b568787 2644nfs_commit(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td)
984263bc 2645{
40393ded
RG
2646 caddr_t cp;
2647 u_int32_t *tl;
2648 int32_t t1, t2;
2649 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
984263bc
MD
2650 caddr_t bpos, dpos, cp2;
2651 int error = 0, wccflag = NFSV3_WCCRATTR;
2652 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2653
2654 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
2655 return (0);
2656 nfsstats.rpccnt[NFSPROC_COMMIT]++;
2657 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1));
2658 nfsm_fhtom(vp, 1);
2659 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2660 txdr_hyper(offset, tl);
2661 tl += 2;
2662 *tl = txdr_unsigned(cnt);
c1cf1e59 2663 nfsm_request(vp, NFSPROC_COMMIT, td, nfs_vpcred(vp, ND_WRITE));
984263bc
MD
2664 nfsm_wcc_data(vp, wccflag);
2665 if (!error) {
2666 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF);
2667 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
2668 NFSX_V3WRITEVERF)) {
2669 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
2670 NFSX_V3WRITEVERF);
2671 error = NFSERR_STALEWRITEVERF;
2672 }
2673 }
6b08710e
MD
2674 m_freem(mrep);
2675nfsmout:
984263bc
MD
2676 return (error);
2677}
2678
2679/*
2680 * Kludge City..
2681 * - make nfs_bmap() essentially a no-op that does no translation
2682 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
2683 * (Maybe I could use the process's page mapping, but I was concerned that
2684 * Kernel Write might not be enabled and also figured copyout() would do
2685 * a lot more work than bcopy() and also it currently happens in the
2686 * context of the swapper process (2).
e851b29e
CP
2687 *
2688 * nfs_bmap(struct vnode *a_vp, daddr_t a_bn, struct vnode **a_vpp,
2689 * daddr_t *a_bnp, int *a_runp, int *a_runb)
984263bc
MD
2690 */
2691static int
e851b29e 2692nfs_bmap(struct vop_bmap_args *ap)
984263bc 2693{
40393ded 2694 struct vnode *vp = ap->a_vp;
984263bc
MD
2695
2696 if (ap->a_vpp != NULL)
2697 *ap->a_vpp = vp;
2698 if (ap->a_bnp != NULL)
2699 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize);
2700 if (ap->a_runp != NULL)
2701 *ap->a_runp = 0;
2702 if (ap->a_runb != NULL)
2703 *ap->a_runb = 0;
2704 return (0);
2705}
2706
2707/*
2708 * Strategy routine.
2709 * For async requests when nfsiod(s) are running, queue the request by
2710 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the
2711 * request.
2712 */
2713static int
e851b29e 2714nfs_strategy(struct vop_strategy_args *ap)
984263bc 2715{
40393ded 2716 struct buf *bp = ap->a_bp;
dadab5e9 2717 struct thread *td;
984263bc
MD
2718 int error = 0;
2719
2720 KASSERT(!(bp->b_flags & B_DONE), ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2721 KASSERT(BUF_REFCNT(bp) > 0, ("nfs_strategy: buffer %p not locked", bp));
2722
2723 if (bp->b_flags & B_PHYS)
2724 panic("nfs physio");
2725
2726 if (bp->b_flags & B_ASYNC)
dadab5e9 2727 td = NULL;
984263bc 2728 else
dadab5e9 2729 td = curthread; /* XXX */
984263bc 2730
984263bc
MD
2731 /*
2732 * If the op is asynchronous and an i/o daemon is waiting
2733 * queue the request, wake it up and wait for completion
2734 * otherwise just do it ourselves.
2735 */
2736 if ((bp->b_flags & B_ASYNC) == 0 ||
3b568787
MD
2737 nfs_asyncio(bp, td))
2738 error = nfs_doio(bp, td);
984263bc
MD
2739 return (error);
2740}
2741
2742/*
2743 * Mmap a file
2744 *
2745 * NB Currently unsupported.
e851b29e
CP
2746 *
2747 * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred,
2748 * struct thread *a_td)
984263bc
MD
2749 */
2750/* ARGSUSED */
2751static int
e851b29e 2752nfs_mmap(struct vop_mmap_args *ap)
984263bc 2753{
984263bc
MD
2754 return (EINVAL);
2755}
2756
2757/*
2758 * fsync vnode op. Just call nfs_flush() with commit == 1.
e851b29e
CP
2759 *
2760 * nfs_fsync(struct vnodeop_desc *a_desc, struct vnode *a_vp,
2761 * struct ucred * a_cred, int a_waitfor, struct thread *a_td)
984263bc
MD
2762 */
2763/* ARGSUSED */
2764static int
e851b29e 2765nfs_fsync(struct vop_fsync_args *ap)
984263bc 2766{
3b568787 2767 return (nfs_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1));
984263bc
MD
2768}
2769
2770/*
2771 * Flush all the blocks associated with a vnode.
2772 * Walk through the buffer pool and push any dirty pages
2773 * associated with the vnode.
2774 */
2775static int
e851b29e 2776nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit)
984263bc 2777{
40393ded
RG
2778 struct nfsnode *np = VTONFS(vp);
2779 struct buf *bp;
2780 int i;
984263bc
MD
2781 struct buf *nbp;
2782 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2783 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2784 int passone = 1;
2785 u_quad_t off, endoff, toff;
984263bc
MD
2786 struct buf **bvec = NULL;
2787#ifndef NFS_COMMITBVECSIZ
2788#define NFS_COMMITBVECSIZ 20
2789#endif
2790 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2791 int bvecsize = 0, bveccount;
2792
2793 if (nmp->nm_flag & NFSMNT_INT)
2794 slpflag = PCATCH;
2795 if (!commit)
2796 passone = 0;
2797 /*
2798 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2799 * server, but nas not been committed to stable storage on the server
2800 * yet. On the first pass, the byte range is worked out and the commit
2801 * rpc is done. On the second pass, nfs_writebp() is called to do the
2802 * job.
2803 */
2804again:
2805 off = (u_quad_t)-1;
2806 endoff = 0;
2807 bvecpos = 0;
2808 if (NFS_ISV3(vp) && commit) {
2809 s = splbio();
2810 /*
2811 * Count up how many buffers waiting for a commit.
2812 */
2813 bveccount = 0;
2814 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2815 nbp = TAILQ_NEXT(bp, b_vnbufs);
2816 if (BUF_REFCNT(bp) == 0 &&
2817 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2818 == (B_DELWRI | B_NEEDCOMMIT))
2819 bveccount++;
2820 }
2821 /*
2822 * Allocate space to remember the list of bufs to commit. It is
2823 * important to use M_NOWAIT here to avoid a race with nfs_write.
2824 * If we can't get memory (for whatever reason), we will end up
2825 * committing the buffers one-by-one in the loop below.
2826 */
2827 if (bvec != NULL && bvec != bvec_on_stack)
2828 free(bvec, M_TEMP);
2829 if (bveccount > NFS_COMMITBVECSIZ) {
2830 bvec = (struct buf **)
2831 malloc(bveccount * sizeof(struct buf *),
2832 M_TEMP, M_NOWAIT);
2833 if (bvec == NULL) {
2834 bvec = bvec_on_stack;
2835 bvecsize = NFS_COMMITBVECSIZ;
2836 } else
2837 bvecsize = bveccount;
2838 } else {
2839 bvec = bvec_on_stack;
2840 bvecsize = NFS_COMMITBVECSIZ;
2841 }
2842 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2843 nbp = TAILQ_NEXT(bp, b_vnbufs);
2844 if (bvecpos >= bvecsize)
2845 break;
2846 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2847 (B_DELWRI | B_NEEDCOMMIT) ||
2848 BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
2849 continue;
2850 bremfree(bp);
2851 /*
984263bc
MD
2852 * NOTE: we are not clearing B_DONE here, so we have
2853 * to do it later on in this routine if we intend to
2854 * initiate I/O on the bp.
2855 *
2856 * Note: to avoid loopback deadlocks, we do not
2857 * assign b_runningbufspace.
2858 */
984263bc
MD
2859 bp->b_flags |= B_WRITEINPROG;
2860 vfs_busy_pages(bp, 1);
2861
2862 /*
2863 * bp is protected by being locked, but nbp is not
2864 * and vfs_busy_pages() may sleep. We have to
2865 * recalculate nbp.
2866 */
2867 nbp = TAILQ_NEXT(bp, b_vnbufs);
2868
2869 /*
2870 * A list of these buffers is kept so that the
2871 * second loop knows which buffers have actually
2872 * been committed. This is necessary, since there
2873 * may be a race between the commit rpc and new
2874 * uncommitted writes on the file.
2875 */
2876 bvec[bvecpos++] = bp;
2877 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2878 bp->b_dirtyoff;
2879 if (toff < off)
2880 off = toff;
2881 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2882 if (toff > endoff)
2883 endoff = toff;
2884 }
2885 splx(s);
2886 }
2887 if (bvecpos > 0) {
2888 /*
3b568787
MD
2889 * Commit data on the server, as required. Note that
2890 * nfs_commit will use the vnode's cred for the commit.
984263bc 2891 */
3b568787 2892 retv = nfs_commit(vp, off, (int)(endoff - off), td);
984263bc
MD
2893
2894 if (retv == NFSERR_STALEWRITEVERF)
2895 nfs_clearcommit(vp->v_mount);
2896
2897 /*
2898 * Now, either mark the blocks I/O done or mark the
2899 * blocks dirty, depending on whether the commit
2900 * succeeded.
2901 */
2902 for (i = 0; i < bvecpos; i++) {
2903 bp = bvec[i];
2904 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG | B_CLUSTEROK);
2905 if (retv) {
2906 /*
2907 * Error, leave B_DELWRI intact
2908 */
2909 vfs_unbusy_pages(bp);
2910 brelse(bp);
2911 } else {
2912 /*
2913 * Success, remove B_DELWRI ( bundirty() ).
2914 *
2915 * b_dirtyoff/b_dirtyend seem to be NFS
2916 * specific. We should probably move that
2917 * into bundirty(). XXX
2918 */
2919 s = splbio();
2920 vp->v_numoutput++;
2921 bp->b_flags |= B_ASYNC;
2922 bundirty(bp);
2923 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR);
2924 bp->b_dirtyoff = bp->b_dirtyend = 0;
2925 splx(s);
2926 biodone(bp);
2927 }
2928 }
2929 }
2930
2931 /*
2932 * Start/do any write(s) that are required.
2933 */
2934loop:
2935 s = splbio();
2936 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2937 nbp = TAILQ_NEXT(bp, b_vnbufs);
2938 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) {
2939 if (waitfor != MNT_WAIT || passone)
2940 continue;
2941 error = BUF_TIMELOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL,
2942 "nfsfsync", slpflag, slptimeo);
2943 splx(s);
2944 if (error == 0)
2945 panic("nfs_fsync: inconsistent lock");
2946 if (error == ENOLCK)
2947 goto loop;
dadab5e9 2948 if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) {
984263bc
MD
2949 error = EINTR;
2950 goto done;
2951 }
2952 if (slpflag == PCATCH) {
2953 slpflag = 0;
2954 slptimeo = 2 * hz;
2955 }
2956 goto loop;
2957 }
2958 if ((bp->b_flags & B_DELWRI) == 0)
2959 panic("nfs_fsync: not dirty");
2960 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
2961 BUF_UNLOCK(bp);
2962 continue;
2963 }
2964 bremfree(bp);
2965 if (passone || !commit)
2966 bp->b_flags |= B_ASYNC;
2967 else
2968 bp->b_flags |= B_ASYNC | B_WRITEINPROG;
2969 splx(s);
2970 VOP_BWRITE(bp->b_vp, bp);
2971 goto loop;
2972 }
2973 splx(s);
2974 if (passone) {
2975 passone = 0;
2976 goto again;
2977 }
2978 if (waitfor == MNT_WAIT) {
2979 while (vp->v_numoutput) {
2980 vp->v_flag |= VBWAIT;
2981 error = tsleep((caddr_t)&vp->v_numoutput,
377d4740 2982 slpflag, "nfsfsync", slptimeo);
984263bc 2983 if (error) {
dadab5e9 2984 if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) {
984263bc
MD
2985 error = EINTR;
2986 goto done;
2987 }
2988 if (slpflag == PCATCH) {
2989 slpflag = 0;
2990 slptimeo = 2 * hz;
2991 }
2992 }
2993 }
2994 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd) && commit) {
2995 goto loop;
2996 }
2997 }
2998 if (np->n_flag & NWRITEERR) {
2999 error = np->n_error;
3000 np->n_flag &= ~NWRITEERR;
3001 }
3002done:
3003 if (bvec != NULL && bvec != bvec_on_stack)
3004 free(bvec, M_TEMP);
3005 return (error);
3006}
3007
3008/*
3009 * NFS advisory byte-level locks.
3010 * Currently unsupported.
e851b29e
CP
3011 *
3012 * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl,
3013 * int a_flags)
984263bc
MD
3014 */
3015static int
e851b29e 3016nfs_advlock(struct vop_advlock_args *ap)
984263bc 3017{
40393ded 3018 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3019
3020 /*
3021 * The following kludge is to allow diskless support to work
3022 * until a real NFS lockd is implemented. Basically, just pretend
3023 * that this is a local lock.
3024 */
3025 return (lf_advlock(ap, &(np->n_lockf), np->n_size));
3026}
3027
3028/*
3029 * Print out the contents of an nfsnode.
e851b29e
CP
3030 *
3031 * nfs_print(struct vnode *a_vp)
984263bc
MD
3032 */
3033static int
e851b29e 3034nfs_print(struct vop_print_args *ap)
984263bc 3035{
40393ded
RG
3036 struct vnode *vp = ap->a_vp;
3037 struct nfsnode *np = VTONFS(vp);
984263bc
MD
3038
3039 printf("tag VT_NFS, fileid %ld fsid 0x%x",
3040 np->n_vattr.va_fileid, np->n_vattr.va_fsid);
3041 if (vp->v_type == VFIFO)
3042 fifo_printinfo(vp);
3043 printf("\n");
3044 return (0);
3045}
3046
3047/*
3048 * Just call nfs_writebp() with the force argument set to 1.
3049 *
3050 * NOTE: B_DONE may or may not be set in a_bp on call.
e851b29e
CP
3051 *
3052 * nfs_bwrite(struct vnode *a_bp)
984263bc
MD
3053 */
3054static int
e851b29e 3055nfs_bwrite(struct vop_bwrite_args *ap)
984263bc 3056{
dadab5e9 3057 return (nfs_writebp(ap->a_bp, 1, curthread));
984263bc
MD
3058}
3059
3060/*
3061 * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless
3062 * the force flag is one and it also handles the B_NEEDCOMMIT flag. We set
3063 * B_CACHE if this is a VMIO buffer.
3064 */
3065int
e851b29e 3066nfs_writebp(struct buf *bp, int force, struct thread *td)
984263bc
MD
3067{
3068 int s;
3069 int oldflags = bp->b_flags;
3070#if 0
3071 int retv = 1;
3072 off_t off;
3073#endif
3074
3075 if (BUF_REFCNT(bp) == 0)
3076 panic("bwrite: buffer is not locked???");
3077
3078 if (bp->b_flags & B_INVAL) {
3079 brelse(bp);
3080 return(0);
3081 }
3082
3083 bp->b_flags |= B_CACHE;
3084
3085 /*
3086 * Undirty the bp. We will redirty it later if the I/O fails.
3087 */
3088
3089 s = splbio();
3090 bundirty(bp);
3091 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR);
3092
3093 bp->b_vp->v_numoutput++;
984263bc
MD
3094 splx(s);
3095
3096 /*
3097 * Note: to avoid loopback deadlocks, we do not
3098 * assign b_runningbufspace.
3099 */
3100 vfs_busy_pages(bp, 1);
3101
3102 if (force)
3103 bp->b_flags |= B_WRITEINPROG;
3104 BUF_KERNPROC(bp);
3105 VOP_STRATEGY(bp->b_vp, bp);
3106
3107 if( (oldflags & B_ASYNC) == 0) {
3108 int rtval = biowait(bp);
3109
3110 if (oldflags & B_DELWRI) {
3111 s = splbio();
3112 reassignbuf(bp, bp->b_vp);
3113 splx(s);
3114 }
3115
3116 brelse(bp);
3117 return (rtval);
3118 }
3119
3120 return (0);
3121}
3122
3123/*
3124 * nfs special file access vnode op.
3125 * Essentially just get vattr and then imitate iaccess() since the device is
3126 * local to the client.
e851b29e
CP
3127 *
3128 * nfsspec_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
3129 * struct thread *a_td)
984263bc
MD
3130 */
3131static int
e851b29e 3132nfsspec_access(struct vop_access_args *ap)
984263bc 3133{
40393ded
RG
3134 struct vattr *vap;
3135 gid_t *gp;
3136 struct ucred *cred = ap->a_cred;
984263bc
MD
3137 struct vnode *vp = ap->a_vp;
3138 mode_t mode = ap->a_mode;
3139 struct vattr vattr;
40393ded 3140 int i;
984263bc
MD
3141 int error;
3142
3143 /*
3144 * Disallow write attempts on filesystems mounted read-only;
3145 * unless the file is a socket, fifo, or a block or character
3146 * device resident on the filesystem.
3147 */
3148 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3149 switch (vp->v_type) {
3150 case VREG:
3151 case VDIR:
3152 case VLNK:
3153 return (EROFS);
3154 default:
3155 break;
3156 }
3157 }
3158 /*
3159 * If you're the super-user,
3160 * you always get access.
3161 */
3162 if (cred->cr_uid == 0)
3163 return (0);
3164 vap = &vattr;
3b568787 3165 error = VOP_GETATTR(vp, vap, ap->a_td);
984263bc
MD
3166 if (error)
3167 return (error);
3168 /*
3169 * Access check is based on only one of owner, group, public.
3170 * If not owner, then check group. If not a member of the
3171 * group, then check public access.
3172 */
3173 if (cred->cr_uid != vap->va_uid) {
3174 mode >>= 3;
3175 gp = cred->cr_groups;
3176 for (i = 0; i < cred->cr_ngroups; i++, gp++)
3177 if (vap->va_gid == *gp)
3178 goto found;
3179 mode >>= 3;
3180found:
3181 ;
3182 }
3183 error = (vap->va_mode & mode) == mode ? 0 : EACCES;
3184 return (error);
3185}
3186
3187/*
3188 * Read wrapper for special devices.
e851b29e
CP
3189 *
3190 * nfsspec_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3191 * struct ucred *a_cred)
984263bc
MD
3192 */
3193static int
e851b29e 3194nfsspec_read(struct vop_read_args *ap)
984263bc 3195{
40393ded 3196 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3197
3198 /*
3199 * Set access flag.
3200 */
3201 np->n_flag |= NACC;
3202 getnanotime(&np->n_atim);
2d3e977e 3203 return (VOCALL(spec_vnode_vops, VOFFSET(vop_read), &ap->a_head));
984263bc
MD
3204}
3205
3206/*
3207 * Write wrapper for special devices.
e851b29e
CP
3208 *
3209 * nfsspec_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3210 * struct ucred *a_cred)
984263bc
MD
3211 */
3212static int
e851b29e 3213nfsspec_write(struct vop_write_args *ap)
984263bc 3214{
40393ded 3215 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3216
3217 /*
3218 * Set update flag.
3219 */
3220 np->n_flag |= NUPD;
3221 getnanotime(&np->n_mtim);
2d3e977e 3222 return (VOCALL(spec_vnode_vops, VOFFSET(vop_write), &ap->a_head));
984263bc
MD
3223}
3224
3225/*
3226 * Close wrapper for special devices.
3227 *
3228 * Update the times on the nfsnode then do device close.
e851b29e
CP
3229 *
3230 * nfsspec_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
3231 * struct thread *a_td)
984263bc
MD
3232 */
3233static int
e851b29e 3234nfsspec_close(struct vop_close_args *ap)
984263bc 3235{
40393ded
RG
3236 struct vnode *vp = ap->a_vp;
3237 struct nfsnode *np = VTONFS(vp);
984263bc
MD
3238 struct vattr vattr;
3239
3240 if (np->n_flag & (NACC | NUPD)) {
3241 np->n_flag |= NCHG;
3242 if (vp->v_usecount == 1 &&
3243 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3244 VATTR_NULL(&vattr);
3245 if (np->n_flag & NACC)
3246 vattr.va_atime = np->n_atim;
3247 if (np->n_flag & NUPD)
3248 vattr.va_mtime = np->n_mtim;
c1cf1e59 3249 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE), ap->a_td);
984263bc
MD
3250 }
3251 }
2d3e977e 3252 return (VOCALL(spec_vnode_vops, VOFFSET(vop_close), &ap->a_head));
984263bc
MD
3253}
3254
3255/*
3256 * Read wrapper for fifos.
e851b29e
CP
3257 *
3258 * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3259 * struct ucred *a_cred)
984263bc
MD
3260 */
3261static int
e851b29e 3262nfsfifo_read(struct vop_read_args *ap)
984263bc 3263{
40393ded 3264 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3265
3266 /*
3267 * Set access flag.
3268 */
3269 np->n_flag |= NACC;
3270 getnanotime(&np->n_atim);
2d3e977e 3271 return (VOCALL(fifo_vnode_vops, VOFFSET(vop_read), &ap->a_head));
984263bc
MD
3272}
3273
3274/*
3275 * Write wrapper for fifos.
e851b29e
CP
3276 *
3277 * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3278 * struct ucred *a_cred)
984263bc
MD
3279 */
3280static int
e851b29e 3281nfsfifo_write(struct vop_write_args *ap)
984263bc 3282{
40393ded 3283 struct nfsnode *np = VTONFS(ap->a_vp);
984263bc
MD
3284
3285 /*
3286 * Set update flag.
3287 */
3288 np->n_flag |= NUPD;
3289 getnanotime(&np->n_mtim);
2d3e977e 3290 return (VOCALL(fifo_vnode_vops, VOFFSET(vop_write), &ap->a_head));
984263bc
MD
3291}
3292
3293/*
3294 * Close wrapper for fifos.
3295 *
3296 * Update the times on the nfsnode then do fifo close.
e851b29e
CP
3297 *
3298 * nfsfifo_close(struct vnode *a_vp, int a_fflag, struct thread *a_td)
984263bc
MD
3299 */
3300static int
e851b29e 3301nfsfifo_close(struct vop_close_args *ap)
984263bc 3302{
40393ded
RG
3303 struct vnode *vp = ap->a_vp;
3304 struct nfsnode *np = VTONFS(vp);
984263bc
MD
3305 struct vattr vattr;
3306 struct timespec ts;
3307
3308 if (np->n_flag & (NACC | NUPD)) {
3309 getnanotime(&ts);
3310 if (np->n_flag & NACC)
3311 np->n_atim = ts;
3312 if (np->n_flag & NUPD)
3313 np->n_mtim = ts;
3314 np->n_flag |= NCHG;
3315 if (vp->v_usecount == 1 &&
3316 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3317 VATTR_NULL(&vattr);
3318 if (np->n_flag & NACC)
3319 vattr.va_atime = np->n_atim;
3320 if (np->n_flag & NUPD)
3321 vattr.va_mtime = np->n_mtim;
c1cf1e59 3322 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE), ap->a_td);
984263bc
MD
3323 }
3324 }
2d3e977e 3325 return (VOCALL(fifo_vnode_vops, VOFFSET(vop_close), &ap->a_head));
984263bc
MD
3326}
3327