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 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * from nfs_vnops.c 8.16 (Berkeley) 5/27/95
33 */
34
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD: releng/8.1/sys/fs/nfsclient/nfs_clvnops.c 207455 2010-05-01 00:50:51Z rmacklem $");
37
38 /*
39 * vnode op calls for Sun NFS version 2, 3 and 4
40 */
41
42 #include "opt_inet.h"
43
44 #include <sys/param.h>
45 #include <sys/kernel.h>
46 #include <sys/systm.h>
47 #include <sys/resourcevar.h>
48 #include <sys/proc.h>
49 #include <sys/mount.h>
50 #include <sys/bio.h>
51 #include <sys/buf.h>
52 #include <sys/jail.h>
53 #include <sys/malloc.h>
54 #include <sys/mbuf.h>
55 #include <sys/namei.h>
56 #include <sys/socket.h>
57 #include <sys/vnode.h>
58 #include <sys/dirent.h>
59 #include <sys/fcntl.h>
60 #include <sys/lockf.h>
61 #include <sys/stat.h>
62 #include <sys/sysctl.h>
63 #include <sys/signalvar.h>
64
65 #include <vm/vm.h>
66 #include <vm/vm_object.h>
67 #include <vm/vm_extern.h>
68 #include <vm/vm_object.h>
69
70
71 #include <fs/nfs/nfsport.h>
72 #include <fs/nfsclient/nfsnode.h>
73 #include <fs/nfsclient/nfsmount.h>
74 #include <fs/nfsclient/nfs.h>
75 #include <fs/nfsclient/nfs_lock.h>
76
77 #include <net/if.h>
78 #include <netinet/in.h>
79 #include <netinet/in_var.h>
80
81 /* Defs */
82 #define TRUE 1
83 #define FALSE 0
84
85 extern struct nfsstats newnfsstats;
86 MALLOC_DECLARE(M_NEWNFSREQ);
87 vop_advlock_t *ncl_advlock_p = ncl_dolock;
88
89 /*
90 * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these
91 * calls are not in getblk() and brelse() so that they would not be necessary
92 * here.
93 */
94 #ifndef B_VMIO
95 #define vfs_busy_pages(bp, f)
96 #endif
97
98 static vop_read_t nfsfifo_read;
99 static vop_write_t nfsfifo_write;
100 static vop_close_t nfsfifo_close;
101 static int nfs_setattrrpc(struct vnode *, struct vattr *, struct ucred *,
102 struct thread *);
103 static vop_lookup_t nfs_lookup;
104 static vop_create_t nfs_create;
105 static vop_mknod_t nfs_mknod;
106 static vop_open_t nfs_open;
107 static vop_close_t nfs_close;
108 static vop_access_t nfs_access;
109 static vop_getattr_t nfs_getattr;
110 static vop_setattr_t nfs_setattr;
111 static vop_read_t nfs_read;
112 static vop_fsync_t nfs_fsync;
113 static vop_remove_t nfs_remove;
114 static vop_link_t nfs_link;
115 static vop_rename_t nfs_rename;
116 static vop_mkdir_t nfs_mkdir;
117 static vop_rmdir_t nfs_rmdir;
118 static vop_symlink_t nfs_symlink;
119 static vop_readdir_t nfs_readdir;
120 static vop_strategy_t nfs_strategy;
121 static vop_lock1_t nfs_lock1;
122 static int nfs_lookitup(struct vnode *, char *, int,
123 struct ucred *, struct thread *, struct nfsnode **);
124 static int nfs_sillyrename(struct vnode *, struct vnode *,
125 struct componentname *);
126 static vop_access_t nfsspec_access;
127 static vop_readlink_t nfs_readlink;
128 static vop_print_t nfs_print;
129 static vop_advlock_t nfs_advlock;
130 static vop_advlockasync_t nfs_advlockasync;
131 #ifdef NFS4_ACL_EXTATTR_NAME
132 static vop_getacl_t nfs_getacl;
133 static vop_setacl_t nfs_setacl;
134 #endif
135
136 /*
137 * Global vfs data structures for nfs
138 */
139 struct vop_vector newnfs_vnodeops = {
140 .vop_default = &default_vnodeops,
141 .vop_access = nfs_access,
142 .vop_advlock = nfs_advlock,
143 .vop_advlockasync = nfs_advlockasync,
144 .vop_close = nfs_close,
145 .vop_create = nfs_create,
146 .vop_fsync = nfs_fsync,
147 .vop_getattr = nfs_getattr,
148 .vop_getpages = ncl_getpages,
149 .vop_putpages = ncl_putpages,
150 .vop_inactive = ncl_inactive,
151 .vop_link = nfs_link,
152 .vop_lock1 = nfs_lock1,
153 .vop_lookup = nfs_lookup,
154 .vop_mkdir = nfs_mkdir,
155 .vop_mknod = nfs_mknod,
156 .vop_open = nfs_open,
157 .vop_print = nfs_print,
158 .vop_read = nfs_read,
159 .vop_readdir = nfs_readdir,
160 .vop_readlink = nfs_readlink,
161 .vop_reclaim = ncl_reclaim,
162 .vop_remove = nfs_remove,
163 .vop_rename = nfs_rename,
164 .vop_rmdir = nfs_rmdir,
165 .vop_setattr = nfs_setattr,
166 .vop_strategy = nfs_strategy,
167 .vop_symlink = nfs_symlink,
168 .vop_write = ncl_write,
169 #ifdef NFS4_ACL_EXTATTR_NAME
170 .vop_getacl = nfs_getacl,
171 .vop_setacl = nfs_setacl,
172 #endif
173 };
174
175 struct vop_vector newnfs_fifoops = {
176 .vop_default = &fifo_specops,
177 .vop_access = nfsspec_access,
178 .vop_close = nfsfifo_close,
179 .vop_fsync = nfs_fsync,
180 .vop_getattr = nfs_getattr,
181 .vop_inactive = ncl_inactive,
182 .vop_print = nfs_print,
183 .vop_read = nfsfifo_read,
184 .vop_reclaim = ncl_reclaim,
185 .vop_setattr = nfs_setattr,
186 .vop_write = nfsfifo_write,
187 };
188
189 static int nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp,
190 struct componentname *cnp, struct vattr *vap);
191 static int nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
192 int namelen, struct ucred *cred, struct thread *td);
193 static int nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp,
194 char *fnameptr, int fnamelen, struct vnode *tdvp, struct vnode *tvp,
195 char *tnameptr, int tnamelen, struct ucred *cred, struct thread *td);
196 static int nfs_renameit(struct vnode *sdvp, struct vnode *svp,
197 struct componentname *scnp, struct sillyrename *sp);
198
199 /*
200 * Global variables
201 */
202 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1))
203
204 SYSCTL_DECL(_vfs_newnfs);
205
206 static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
207 SYSCTL_INT(_vfs_newnfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
208 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
209
210 static int nfs_prime_access_cache = 0;
211 SYSCTL_INT(_vfs_newnfs, OID_AUTO, prime_access_cache, CTLFLAG_RW,
212 &nfs_prime_access_cache, 0,
213 "Prime NFS ACCESS cache when fetching attributes");
214
215 static int newnfs_commit_on_close = 0;
216 SYSCTL_INT(_vfs_newnfs, OID_AUTO, commit_on_close, CTLFLAG_RW,
217 &newnfs_commit_on_close, 0, "write+commit on close, else only write");
218
219 static int nfs_clean_pages_on_close = 1;
220 SYSCTL_INT(_vfs_newnfs, OID_AUTO, clean_pages_on_close, CTLFLAG_RW,
221 &nfs_clean_pages_on_close, 0, "NFS clean dirty pages on close");
222
223 int newnfs_directio_enable = 0;
224 SYSCTL_INT(_vfs_newnfs, OID_AUTO, directio_enable, CTLFLAG_RW,
225 &newnfs_directio_enable, 0, "Enable NFS directio");
226
227 /*
228 * This sysctl allows other processes to mmap a file that has been opened
229 * O_DIRECT by a process. In general, having processes mmap the file while
230 * Direct IO is in progress can lead to Data Inconsistencies. But, we allow
231 * this by default to prevent DoS attacks - to prevent a malicious user from
232 * opening up files O_DIRECT preventing other users from mmap'ing these
233 * files. "Protected" environments where stricter consistency guarantees are
234 * required can disable this knob. The process that opened the file O_DIRECT
235 * cannot mmap() the file, because mmap'ed IO on an O_DIRECT open() is not
236 * meaningful.
237 */
238 int newnfs_directio_allow_mmap = 1;
239 SYSCTL_INT(_vfs_newnfs, OID_AUTO, directio_allow_mmap, CTLFLAG_RW,
240 &newnfs_directio_allow_mmap, 0, "Enable mmaped IO on file with O_DIRECT opens");
241
242 #if 0
243 SYSCTL_INT(_vfs_newnfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
244 &newnfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
245
246 SYSCTL_INT(_vfs_newnfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
247 &newnfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
248 #endif
249
250 #define NFSACCESS_ALL (NFSACCESS_READ | NFSACCESS_MODIFY \
251 | NFSACCESS_EXTEND | NFSACCESS_EXECUTE \
252 | NFSACCESS_DELETE | NFSACCESS_LOOKUP)
253
254 /*
255 * SMP Locking Note :
256 * The list of locks after the description of the lock is the ordering
257 * of other locks acquired with the lock held.
258 * np->n_mtx : Protects the fields in the nfsnode.
259 VM Object Lock
260 VI_MTX (acquired indirectly)
261 * nmp->nm_mtx : Protects the fields in the nfsmount.
262 rep->r_mtx
263 * ncl_iod_mutex : Global lock, protects shared nfsiod state.
264 * nfs_reqq_mtx : Global lock, protects the nfs_reqq list.
265 nmp->nm_mtx
266 rep->r_mtx
267 * rep->r_mtx : Protects the fields in an nfsreq.
268 */
269
270 static int
271 nfs34_access_otw(struct vnode *vp, int wmode, struct thread *td,
272 struct ucred *cred, u_int32_t *retmode)
273 {
274 int error = 0, attrflag, i, lrupos;
275 u_int32_t rmode;
276 struct nfsnode *np = VTONFS(vp);
277 struct nfsvattr nfsva;
278
279 error = nfsrpc_accessrpc(vp, wmode, cred, td, &nfsva, &attrflag,
280 &rmode, NULL);
281 if (attrflag)
282 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
283 if (!error) {
284 lrupos = 0;
285 mtx_lock(&np->n_mtx);
286 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
287 if (np->n_accesscache[i].uid == cred->cr_uid) {
288 np->n_accesscache[i].mode = rmode;
289 np->n_accesscache[i].stamp = time_second;
290 break;
291 }
292 if (i > 0 && np->n_accesscache[i].stamp <
293 np->n_accesscache[lrupos].stamp)
294 lrupos = i;
295 }
296 if (i == NFS_ACCESSCACHESIZE) {
297 np->n_accesscache[lrupos].uid = cred->cr_uid;
298 np->n_accesscache[lrupos].mode = rmode;
299 np->n_accesscache[lrupos].stamp = time_second;
300 }
301 mtx_unlock(&np->n_mtx);
302 if (retmode != NULL)
303 *retmode = rmode;
304 } else if (NFS_ISV4(vp)) {
305 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
306 }
307 return (error);
308 }
309
310 /*
311 * nfs access vnode op.
312 * For nfs version 2, just return ok. File accesses may fail later.
313 * For nfs version 3, use the access rpc to check accessibility. If file modes
314 * are changed on the server, accesses might still fail later.
315 */
316 static int
317 nfs_access(struct vop_access_args *ap)
318 {
319 struct vnode *vp = ap->a_vp;
320 int error = 0, i, gotahit;
321 u_int32_t mode, wmode, rmode;
322 int v34 = NFS_ISV34(vp);
323 struct nfsnode *np = VTONFS(vp);
324
325 /*
326 * Disallow write attempts on filesystems mounted read-only;
327 * unless the file is a socket, fifo, or a block or character
328 * device resident on the filesystem.
329 */
330 if ((ap->a_accmode & (VWRITE | VAPPEND
331 #ifdef NFS4_ACL_EXTATTR_NAME
332 | VWRITE_NAMED_ATTRS | VDELETE_CHILD | VWRITE_ATTRIBUTES |
333 VDELETE | VWRITE_ACL | VWRITE_OWNER
334 #endif
335 )) != 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0) {
336 switch (vp->v_type) {
337 case VREG:
338 case VDIR:
339 case VLNK:
340 return (EROFS);
341 default:
342 break;
343 }
344 }
345 /*
346 * For nfs v3 or v4, check to see if we have done this recently, and if
347 * so return our cached result instead of making an ACCESS call.
348 * If not, do an access rpc, otherwise you are stuck emulating
349 * ufs_access() locally using the vattr. This may not be correct,
350 * since the server may apply other access criteria such as
351 * client uid-->server uid mapping that we do not know about.
352 */
353 if (v34) {
354 if (ap->a_accmode & VREAD)
355 mode = NFSACCESS_READ;
356 else
357 mode = 0;
358 if (vp->v_type != VDIR) {
359 if (ap->a_accmode & VWRITE)
360 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
361 if (ap->a_accmode & VAPPEND)
362 mode |= NFSACCESS_EXTEND;
363 if (ap->a_accmode & VEXEC)
364 mode |= NFSACCESS_EXECUTE;
365 #ifdef NFS4_ACL_EXTATTR_NAME
366 if (ap->a_accmode & VDELETE)
367 mode |= NFSACCESS_DELETE;
368 #endif
369 } else {
370 if (ap->a_accmode & VWRITE)
371 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
372 if (ap->a_accmode & VAPPEND)
373 mode |= NFSACCESS_EXTEND;
374 if (ap->a_accmode & VEXEC)
375 mode |= NFSACCESS_LOOKUP;
376 #ifdef NFS4_ACL_EXTATTR_NAME
377 if (ap->a_accmode & VDELETE)
378 mode |= NFSACCESS_DELETE;
379 if (ap->a_accmode & VDELETE_CHILD)
380 mode |= NFSACCESS_MODIFY;
381 #endif
382 }
383 /* XXX safety belt, only make blanket request if caching */
384 if (nfsaccess_cache_timeout > 0) {
385 wmode = NFSACCESS_READ | NFSACCESS_MODIFY |
386 NFSACCESS_EXTEND | NFSACCESS_EXECUTE |
387 NFSACCESS_DELETE | NFSACCESS_LOOKUP;
388 } else {
389 wmode = mode;
390 }
391
392 /*
393 * Does our cached result allow us to give a definite yes to
394 * this request?
395 */
396 gotahit = 0;
397 mtx_lock(&np->n_mtx);
398 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
399 if (ap->a_cred->cr_uid == np->n_accesscache[i].uid) {
400 if (time_second < (np->n_accesscache[i].stamp
401 + nfsaccess_cache_timeout) &&
402 (np->n_accesscache[i].mode & mode) == mode) {
403 NFSINCRGLOBAL(newnfsstats.accesscache_hits);
404 gotahit = 1;
405 }
406 break;
407 }
408 }
409 mtx_unlock(&np->n_mtx);
410 if (gotahit == 0) {
411 /*
412 * Either a no, or a don't know. Go to the wire.
413 */
414 NFSINCRGLOBAL(newnfsstats.accesscache_misses);
415 error = nfs34_access_otw(vp, wmode, ap->a_td,
416 ap->a_cred, &rmode);
417 if (!error &&
418 (rmode & mode) != mode)
419 error = EACCES;
420 }
421 return (error);
422 } else {
423 if ((error = nfsspec_access(ap)) != 0) {
424 return (error);
425 }
426 /*
427 * Attempt to prevent a mapped root from accessing a file
428 * which it shouldn't. We try to read a byte from the file
429 * if the user is root and the file is not zero length.
430 * After calling nfsspec_access, we should have the correct
431 * file size cached.
432 */
433 mtx_lock(&np->n_mtx);
434 if (ap->a_cred->cr_uid == 0 && (ap->a_accmode & VREAD)
435 && VTONFS(vp)->n_size > 0) {
436 struct iovec aiov;
437 struct uio auio;
438 char buf[1];
439
440 mtx_unlock(&np->n_mtx);
441 aiov.iov_base = buf;
442 aiov.iov_len = 1;
443 auio.uio_iov = &aiov;
444 auio.uio_iovcnt = 1;
445 auio.uio_offset = 0;
446 auio.uio_resid = 1;
447 auio.uio_segflg = UIO_SYSSPACE;
448 auio.uio_rw = UIO_READ;
449 auio.uio_td = ap->a_td;
450
451 if (vp->v_type == VREG)
452 error = ncl_readrpc(vp, &auio, ap->a_cred);
453 else if (vp->v_type == VDIR) {
454 char* bp;
455 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
456 aiov.iov_base = bp;
457 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
458 error = ncl_readdirrpc(vp, &auio, ap->a_cred,
459 ap->a_td);
460 free(bp, M_TEMP);
461 } else if (vp->v_type == VLNK)
462 error = ncl_readlinkrpc(vp, &auio, ap->a_cred);
463 else
464 error = EACCES;
465 } else
466 mtx_unlock(&np->n_mtx);
467 return (error);
468 }
469 }
470
471
472 /*
473 * nfs open vnode op
474 * Check to see if the type is ok
475 * and that deletion is not in progress.
476 * For paged in text files, you will need to flush the page cache
477 * if consistency is lost.
478 */
479 /* ARGSUSED */
480 static int
481 nfs_open(struct vop_open_args *ap)
482 {
483 struct vnode *vp = ap->a_vp;
484 struct nfsnode *np = VTONFS(vp);
485 struct vattr vattr;
486 int error;
487 int fmode = ap->a_mode;
488
489 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK)
490 return (EOPNOTSUPP);
491
492 /*
493 * For NFSv4, we need to do the Open Op before cache validation,
494 * so that we conform to RFC3530 Sec. 9.3.1.
495 */
496 if (NFS_ISV4(vp)) {
497 error = nfsrpc_open(vp, fmode, ap->a_cred, ap->a_td);
498 if (error) {
499 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
500 (gid_t)0);
501 return (error);
502 }
503 }
504
505 /*
506 * Now, if this Open will be doing reading, re-validate/flush the
507 * cache, so that Close/Open coherency is maintained.
508 */
509 if ((fmode & FREAD) && (!NFS_ISV4(vp) || nfscl_mustflush(vp))) {
510 mtx_lock(&np->n_mtx);
511 if (np->n_flag & NMODIFIED) {
512 mtx_unlock(&np->n_mtx);
513 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
514 if (error == EINTR || error == EIO) {
515 if (NFS_ISV4(vp))
516 (void) nfsrpc_close(vp, 0, ap->a_td);
517 return (error);
518 }
519 np->n_attrstamp = 0;
520 if (vp->v_type == VDIR)
521 np->n_direofoffset = 0;
522 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
523 if (error) {
524 if (NFS_ISV4(vp))
525 (void) nfsrpc_close(vp, 0, ap->a_td);
526 return (error);
527 }
528 mtx_lock(&np->n_mtx);
529 np->n_mtime = vattr.va_mtime;
530 if (NFS_ISV4(vp))
531 np->n_change = vattr.va_filerev;
532 mtx_unlock(&np->n_mtx);
533 } else {
534 struct thread *td = curthread;
535
536 if (np->n_ac_ts_syscalls != td->td_syscalls ||
537 np->n_ac_ts_tid != td->td_tid ||
538 td->td_proc == NULL ||
539 np->n_ac_ts_pid != td->td_proc->p_pid) {
540 np->n_attrstamp = 0;
541 }
542 mtx_unlock(&np->n_mtx);
543 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
544 if (error) {
545 if (NFS_ISV4(vp))
546 (void) nfsrpc_close(vp, 0, ap->a_td);
547 return (error);
548 }
549 mtx_lock(&np->n_mtx);
550 if ((NFS_ISV4(vp) && np->n_change != vattr.va_filerev) ||
551 NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
552 if (vp->v_type == VDIR)
553 np->n_direofoffset = 0;
554 mtx_unlock(&np->n_mtx);
555 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
556 if (error == EINTR || error == EIO) {
557 if (NFS_ISV4(vp))
558 (void) nfsrpc_close(vp, 0,
559 ap->a_td);
560 return (error);
561 }
562 mtx_lock(&np->n_mtx);
563 np->n_mtime = vattr.va_mtime;
564 if (NFS_ISV4(vp))
565 np->n_change = vattr.va_filerev;
566 }
567 mtx_unlock(&np->n_mtx);
568 }
569 }
570
571 /*
572 * If the object has >= 1 O_DIRECT active opens, we disable caching.
573 */
574 if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) {
575 if (np->n_directio_opens == 0) {
576 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
577 if (error) {
578 if (NFS_ISV4(vp))
579 (void) nfsrpc_close(vp, 0, ap->a_td);
580 return (error);
581 }
582 mtx_lock(&np->n_mtx);
583 np->n_flag |= NNONCACHE;
584 } else {
585 mtx_lock(&np->n_mtx);
586 }
587 np->n_directio_opens++;
588 mtx_unlock(&np->n_mtx);
589 }
590 vnode_create_vobject(vp, vattr.va_size, ap->a_td);
591 return (0);
592 }
593
594 /*
595 * nfs close vnode op
596 * What an NFS client should do upon close after writing is a debatable issue.
597 * Most NFS clients push delayed writes to the server upon close, basically for
598 * two reasons:
599 * 1 - So that any write errors may be reported back to the client process
600 * doing the close system call. By far the two most likely errors are
601 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
602 * 2 - To put a worst case upper bound on cache inconsistency between
603 * multiple clients for the file.
604 * There is also a consistency problem for Version 2 of the protocol w.r.t.
605 * not being able to tell if other clients are writing a file concurrently,
606 * since there is no way of knowing if the changed modify time in the reply
607 * is only due to the write for this client.
608 * (NFS Version 3 provides weak cache consistency data in the reply that
609 * should be sufficient to detect and handle this case.)
610 *
611 * The current code does the following:
612 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
613 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
614 * or commit them (this satisfies 1 and 2 except for the
615 * case where the server crashes after this close but
616 * before the commit RPC, which is felt to be "good
617 * enough". Changing the last argument to ncl_flush() to
618 * a 1 would force a commit operation, if it is felt a
619 * commit is necessary now.
620 * for NFS Version 4 - flush the dirty buffers and commit them, if
621 * nfscl_mustflush() says this is necessary.
622 * It is necessary if there is no write delegation held,
623 * in order to satisfy open/close coherency.
624 * If the file isn't cached on local stable storage,
625 * it may be necessary in order to detect "out of space"
626 * errors from the server, if the write delegation
627 * issued by the server doesn't allow the file to grow.
628 */
629 /* ARGSUSED */
630 static int
631 nfs_close(struct vop_close_args *ap)
632 {
633 struct vnode *vp = ap->a_vp;
634 struct nfsnode *np = VTONFS(vp);
635 struct nfsvattr nfsva;
636 struct ucred *cred;
637 int error = 0, ret, localcred = 0;
638 int fmode = ap->a_fflag;
639
640 if ((vp->v_mount->mnt_kern_flag & MNTK_UNMOUNTF))
641 return (0);
642 /*
643 * During shutdown, a_cred isn't valid, so just use root.
644 */
645 if (ap->a_cred == NOCRED) {
646 cred = newnfs_getcred();
647 localcred = 1;
648 } else {
649 cred = ap->a_cred;
650 }
651 if (vp->v_type == VREG) {
652 /*
653 * Examine and clean dirty pages, regardless of NMODIFIED.
654 * This closes a major hole in close-to-open consistency.
655 * We want to push out all dirty pages (and buffers) on
656 * close, regardless of whether they were dirtied by
657 * mmap'ed writes or via write().
658 */
659 if (nfs_clean_pages_on_close && vp->v_object) {
660 VM_OBJECT_LOCK(vp->v_object);
661 vm_object_page_clean(vp->v_object, 0, 0, 0);
662 VM_OBJECT_UNLOCK(vp->v_object);
663 }
664 mtx_lock(&np->n_mtx);
665 if (np->n_flag & NMODIFIED) {
666 mtx_unlock(&np->n_mtx);
667 if (NFS_ISV3(vp)) {
668 /*
669 * Under NFSv3 we have dirty buffers to dispose of. We
670 * must flush them to the NFS server. We have the option
671 * of waiting all the way through the commit rpc or just
672 * waiting for the initial write. The default is to only
673 * wait through the initial write so the data is in the
674 * server's cache, which is roughly similar to the state
675 * a standard disk subsystem leaves the file in on close().
676 *
677 * We cannot clear the NMODIFIED bit in np->n_flag due to
678 * potential races with other processes, and certainly
679 * cannot clear it if we don't commit.
680 * These races occur when there is no longer the old
681 * traditional vnode locking implemented for Vnode Ops.
682 */
683 int cm = newnfs_commit_on_close ? 1 : 0;
684 error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td, cm, 0);
685 /* np->n_flag &= ~NMODIFIED; */
686 } else if (NFS_ISV4(vp)) {
687 if (nfscl_mustflush(vp)) {
688 int cm = newnfs_commit_on_close ? 1 : 0;
689 error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td,
690 cm, 0);
691 /*
692 * as above w.r.t races when clearing
693 * NMODIFIED.
694 * np->n_flag &= ~NMODIFIED;
695 */
696 }
697 } else
698 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
699 mtx_lock(&np->n_mtx);
700 }
701 /*
702 * Invalidate the attribute cache in all cases.
703 * An open is going to fetch fresh attrs any way, other procs
704 * on this node that have file open will be forced to do an
705 * otw attr fetch, but this is safe.
706 * --> A user found that their RPC count dropped by 20% when
707 * this was commented out and I can't see any requirement
708 * for it, so I've disabled it when negative lookups are
709 * enabled. (What does this have to do with negative lookup
710 * caching? Well nothing, except it was reported by the
711 * same user that needed negative lookup caching and I wanted
712 * there to be a way to disable it to see if it
713 * is the cause of some caching/coherency issue that might
714 * crop up.)
715 */
716 if (VFSTONFS(vp->v_mount)->nm_negnametimeo == 0)
717 np->n_attrstamp = 0;
718 if (np->n_flag & NWRITEERR) {
719 np->n_flag &= ~NWRITEERR;
720 error = np->n_error;
721 }
722 mtx_unlock(&np->n_mtx);
723 }
724
725 if (NFS_ISV4(vp)) {
726 /*
727 * Get attributes so "change" is up to date.
728 */
729 if (!error) {
730 ret = nfsrpc_getattr(vp, cred, ap->a_td, &nfsva,
731 NULL);
732 if (!ret) {
733 np->n_change = nfsva.na_filerev;
734 (void) nfscl_loadattrcache(&vp, &nfsva, NULL,
735 NULL, 0, 0);
736 }
737 }
738
739 /*
740 * and do the close.
741 */
742 ret = nfsrpc_close(vp, 0, ap->a_td);
743 if (!error && ret)
744 error = ret;
745 if (error)
746 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
747 (gid_t)0);
748 }
749 if (newnfs_directio_enable)
750 KASSERT((np->n_directio_asyncwr == 0),
751 ("nfs_close: dirty unflushed (%d) directio buffers\n",
752 np->n_directio_asyncwr));
753 if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) {
754 mtx_lock(&np->n_mtx);
755 KASSERT((np->n_directio_opens > 0),
756 ("nfs_close: unexpectedly value (0) of n_directio_opens\n"));
757 np->n_directio_opens--;
758 if (np->n_directio_opens == 0)
759 np->n_flag &= ~NNONCACHE;
760 mtx_unlock(&np->n_mtx);
761 }
762 if (localcred)
763 NFSFREECRED(cred);
764 return (error);
765 }
766
767 /*
768 * nfs getattr call from vfs.
769 */
770 static int
771 nfs_getattr(struct vop_getattr_args *ap)
772 {
773 struct vnode *vp = ap->a_vp;
774 struct thread *td = curthread; /* XXX */
775 struct nfsnode *np = VTONFS(vp);
776 int error = 0;
777 struct nfsvattr nfsva;
778 struct vattr *vap = ap->a_vap;
779 struct vattr vattr;
780
781 /*
782 * Update local times for special files.
783 */
784 mtx_lock(&np->n_mtx);
785 if (np->n_flag & (NACC | NUPD))
786 np->n_flag |= NCHG;
787 mtx_unlock(&np->n_mtx);
788 /*
789 * First look in the cache.
790 */
791 if (ncl_getattrcache(vp, &vattr) == 0) {
792 vap->va_type = vattr.va_type;
793 vap->va_mode = vattr.va_mode;
794 vap->va_nlink = vattr.va_nlink;
795 vap->va_uid = vattr.va_uid;
796 vap->va_gid = vattr.va_gid;
797 vap->va_fsid = vattr.va_fsid;
798 vap->va_fileid = vattr.va_fileid;
799 vap->va_size = vattr.va_size;
800 vap->va_blocksize = vattr.va_blocksize;
801 vap->va_atime = vattr.va_atime;
802 vap->va_mtime = vattr.va_mtime;
803 vap->va_ctime = vattr.va_ctime;
804 vap->va_gen = vattr.va_gen;
805 vap->va_flags = vattr.va_flags;
806 vap->va_rdev = vattr.va_rdev;
807 vap->va_bytes = vattr.va_bytes;
808 vap->va_filerev = vattr.va_filerev;
809 /*
810 * Get the local modify time for the case of a write
811 * delegation.
812 */
813 nfscl_deleggetmodtime(vp, &vap->va_mtime);
814 return (0);
815 }
816
817 if (NFS_ISV34(vp) && nfs_prime_access_cache &&
818 nfsaccess_cache_timeout > 0) {
819 NFSINCRGLOBAL(newnfsstats.accesscache_misses);
820 nfs34_access_otw(vp, NFSACCESS_ALL, td, ap->a_cred, NULL);
821 if (ncl_getattrcache(vp, ap->a_vap) == 0) {
822 nfscl_deleggetmodtime(vp, &ap->a_vap->va_mtime);
823 return (0);
824 }
825 }
826 error = nfsrpc_getattr(vp, ap->a_cred, td, &nfsva, NULL);
827 if (!error)
828 error = nfscl_loadattrcache(&vp, &nfsva, vap, NULL, 0, 0);
829 if (!error) {
830 /*
831 * Get the local modify time for the case of a write
832 * delegation.
833 */
834 nfscl_deleggetmodtime(vp, &vap->va_mtime);
835 } else if (NFS_ISV4(vp)) {
836 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
837 }
838 return (error);
839 }
840
841 /*
842 * nfs setattr call.
843 */
844 static int
845 nfs_setattr(struct vop_setattr_args *ap)
846 {
847 struct vnode *vp = ap->a_vp;
848 struct nfsnode *np = VTONFS(vp);
849 struct thread *td = curthread; /* XXX */
850 struct vattr *vap = ap->a_vap;
851 int error = 0;
852 u_quad_t tsize;
853
854 #ifndef nolint
855 tsize = (u_quad_t)0;
856 #endif
857
858 /*
859 * Setting of flags and marking of atimes are not supported.
860 */
861 if (vap->va_flags != VNOVAL)
862 return (EOPNOTSUPP);
863
864 /*
865 * Disallow write attempts if the filesystem is mounted read-only.
866 */
867 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
868 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
869 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
870 (vp->v_mount->mnt_flag & MNT_RDONLY))
871 return (EROFS);
872 if (vap->va_size != VNOVAL) {
873 switch (vp->v_type) {
874 case VDIR:
875 return (EISDIR);
876 case VCHR:
877 case VBLK:
878 case VSOCK:
879 case VFIFO:
880 if (vap->va_mtime.tv_sec == VNOVAL &&
881 vap->va_atime.tv_sec == VNOVAL &&
882 vap->va_mode == (mode_t)VNOVAL &&
883 vap->va_uid == (uid_t)VNOVAL &&
884 vap->va_gid == (gid_t)VNOVAL)
885 return (0);
886 vap->va_size = VNOVAL;
887 break;
888 default:
889 /*
890 * Disallow write attempts if the filesystem is
891 * mounted read-only.
892 */
893 if (vp->v_mount->mnt_flag & MNT_RDONLY)
894 return (EROFS);
895 /*
896 * We run vnode_pager_setsize() early (why?),
897 * we must set np->n_size now to avoid vinvalbuf
898 * V_SAVE races that might setsize a lower
899 * value.
900 */
901 mtx_lock(&np->n_mtx);
902 tsize = np->n_size;
903 mtx_unlock(&np->n_mtx);
904 error = ncl_meta_setsize(vp, ap->a_cred, td,
905 vap->va_size);
906 mtx_lock(&np->n_mtx);
907 if (np->n_flag & NMODIFIED) {
908 tsize = np->n_size;
909 mtx_unlock(&np->n_mtx);
910 if (vap->va_size == 0)
911 error = ncl_vinvalbuf(vp, 0, td, 1);
912 else
913 error = ncl_vinvalbuf(vp, V_SAVE, td, 1);
914 if (error) {
915 vnode_pager_setsize(vp, tsize);
916 return (error);
917 }
918 /*
919 * Call nfscl_delegmodtime() to set the modify time
920 * locally, as required.
921 */
922 nfscl_delegmodtime(vp);
923 } else
924 mtx_unlock(&np->n_mtx);
925 /*
926 * np->n_size has already been set to vap->va_size
927 * in ncl_meta_setsize(). We must set it again since
928 * nfs_loadattrcache() could be called through
929 * ncl_meta_setsize() and could modify np->n_size.
930 */
931 mtx_lock(&np->n_mtx);
932 np->n_vattr.na_size = np->n_size = vap->va_size;
933 mtx_unlock(&np->n_mtx);
934 };
935 } else {
936 mtx_lock(&np->n_mtx);
937 if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) &&
938 (np->n_flag & NMODIFIED) && vp->v_type == VREG) {
939 mtx_unlock(&np->n_mtx);
940 if ((error = ncl_vinvalbuf(vp, V_SAVE, td, 1)) != 0 &&
941 (error == EINTR || error == EIO))
942 return (error);
943 } else
944 mtx_unlock(&np->n_mtx);
945 }
946 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
947 if (error && vap->va_size != VNOVAL) {
948 mtx_lock(&np->n_mtx);
949 np->n_size = np->n_vattr.na_size = tsize;
950 vnode_pager_setsize(vp, tsize);
951 mtx_unlock(&np->n_mtx);
952 }
953 return (error);
954 }
955
956 /*
957 * Do an nfs setattr rpc.
958 */
959 static int
960 nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred,
961 struct thread *td)
962 {
963 struct nfsnode *np = VTONFS(vp);
964 int error, ret, attrflag, i;
965 struct nfsvattr nfsva;
966
967 if (NFS_ISV34(vp)) {
968 mtx_lock(&np->n_mtx);
969 for (i = 0; i < NFS_ACCESSCACHESIZE; i++)
970 np->n_accesscache[i].stamp = 0;
971 np->n_flag |= NDELEGMOD;
972 mtx_unlock(&np->n_mtx);
973 }
974 error = nfsrpc_setattr(vp, vap, NULL, cred, td, &nfsva, &attrflag,
975 NULL);
976 if (attrflag) {
977 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
978 if (ret && !error)
979 error = ret;
980 }
981 if (error && NFS_ISV4(vp))
982 error = nfscl_maperr(td, error, vap->va_uid, vap->va_gid);
983 return (error);
984 }
985
986 /*
987 * nfs lookup call, one step at a time...
988 * First look in cache
989 * If not found, unlock the directory nfsnode and do the rpc
990 */
991 static int
992 nfs_lookup(struct vop_lookup_args *ap)
993 {
994 struct componentname *cnp = ap->a_cnp;
995 struct vnode *dvp = ap->a_dvp;
996 struct vnode **vpp = ap->a_vpp;
997 struct mount *mp = dvp->v_mount;
998 int flags = cnp->cn_flags;
999 struct vnode *newvp;
1000 struct nfsmount *nmp;
1001 struct nfsnode *np;
1002 int error = 0, attrflag, dattrflag, ltype;
1003 struct thread *td = cnp->cn_thread;
1004 struct nfsfh *nfhp;
1005 struct nfsvattr dnfsva, nfsva;
1006 struct vattr vattr;
1007 time_t dmtime;
1008
1009 *vpp = NULLVP;
1010 if ((flags & ISLASTCN) && (mp->mnt_flag & MNT_RDONLY) &&
1011 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
1012 return (EROFS);
1013 if (dvp->v_type != VDIR)
1014 return (ENOTDIR);
1015 nmp = VFSTONFS(mp);
1016 np = VTONFS(dvp);
1017
1018 /* For NFSv4, wait until any remove is done. */
1019 mtx_lock(&np->n_mtx);
1020 while (NFSHASNFSV4(nmp) && (np->n_flag & NREMOVEINPROG)) {
1021 np->n_flag |= NREMOVEWANT;
1022 (void) msleep((caddr_t)np, &np->n_mtx, PZERO, "nfslkup", 0);
1023 }
1024 mtx_unlock(&np->n_mtx);
1025
1026 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0)
1027 return (error);
1028 error = cache_lookup(dvp, vpp, cnp);
1029 if (error > 0 && error != ENOENT)
1030 return (error);
1031 if (error == -1) {
1032 /*
1033 * We only accept a positive hit in the cache if the
1034 * change time of the file matches our cached copy.
1035 * Otherwise, we discard the cache entry and fallback
1036 * to doing a lookup RPC.
1037 */
1038 newvp = *vpp;
1039 if (nfscl_nodeleg(newvp, 0) == 0 ||
1040 (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred)
1041 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime)) {
1042 NFSINCRGLOBAL(newnfsstats.lookupcache_hits);
1043 if (cnp->cn_nameiop != LOOKUP &&
1044 (flags & ISLASTCN))
1045 cnp->cn_flags |= SAVENAME;
1046 return (0);
1047 }
1048 cache_purge(newvp);
1049 if (dvp != newvp)
1050 vput(newvp);
1051 else
1052 vrele(newvp);
1053 *vpp = NULLVP;
1054 } else if (error == ENOENT) {
1055 if (dvp->v_iflag & VI_DOOMED)
1056 return (ENOENT);
1057 /*
1058 * We only accept a negative hit in the cache if the
1059 * modification time of the parent directory matches
1060 * our cached copy. Otherwise, we discard all of the
1061 * negative cache entries for this directory. We also
1062 * only trust -ve cache entries for less than
1063 * nm_negative_namecache_timeout seconds.
1064 */
1065 if ((u_int)(ticks - np->n_dmtime_ticks) <
1066 (nmp->nm_negnametimeo * hz) &&
1067 VOP_GETATTR(dvp, &vattr, cnp->cn_cred) == 0 &&
1068 vattr.va_mtime.tv_sec == np->n_dmtime) {
1069 NFSINCRGLOBAL(newnfsstats.lookupcache_hits);
1070 return (ENOENT);
1071 }
1072 cache_purge_negative(dvp);
1073 mtx_lock(&np->n_mtx);
1074 np->n_dmtime = 0;
1075 mtx_unlock(&np->n_mtx);
1076 }
1077
1078 /*
1079 * Cache the modification time of the parent directory in case
1080 * the lookup fails and results in adding the first negative
1081 * name cache entry for the directory. Since this is reading
1082 * a single time_t, don't bother with locking. The
1083 * modification time may be a bit stale, but it must be read
1084 * before performing the lookup RPC to prevent a race where
1085 * another lookup updates the timestamp on the directory after
1086 * the lookup RPC has been performed on the server but before
1087 * n_dmtime is set at the end of this function.
1088 */
1089 dmtime = np->n_vattr.na_mtime.tv_sec;
1090 error = 0;
1091 newvp = NULLVP;
1092 NFSINCRGLOBAL(newnfsstats.lookupcache_misses);
1093 error = nfsrpc_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1094 cnp->cn_cred, td, &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1095 NULL);
1096 if (dattrflag)
1097 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1098 if (error) {
1099 if (newvp != NULLVP) {
1100 vput(newvp);
1101 *vpp = NULLVP;
1102 }
1103
1104 if (error != ENOENT) {
1105 if (NFS_ISV4(dvp))
1106 error = nfscl_maperr(td, error, (uid_t)0,
1107 (gid_t)0);
1108 return (error);
1109 }
1110
1111 /* The requested file was not found. */
1112 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
1113 (flags & ISLASTCN)) {
1114 /*
1115 * XXX: UFS does a full VOP_ACCESS(dvp,
1116 * VWRITE) here instead of just checking
1117 * MNT_RDONLY.
1118 */
1119 if (mp->mnt_flag & MNT_RDONLY)
1120 return (EROFS);
1121 cnp->cn_flags |= SAVENAME;
1122 return (EJUSTRETURN);
1123 }
1124
1125 if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE) {
1126 /*
1127 * Maintain n_dmtime as the modification time
1128 * of the parent directory when the oldest -ve
1129 * name cache entry for this directory was
1130 * added. If a -ve cache entry has already
1131 * been added with a newer modification time
1132 * by a concurrent lookup, then don't bother
1133 * adding a cache entry. The modification
1134 * time of the directory might have changed
1135 * due to the file this lookup failed to find
1136 * being created. In that case a subsequent
1137 * lookup would incorrectly use the entry
1138 * added here instead of doing an extra
1139 * lookup.
1140 */
1141 mtx_lock(&np->n_mtx);
1142 if (np->n_dmtime <= dmtime) {
1143 if (np->n_dmtime == 0) {
1144 np->n_dmtime = dmtime;
1145 np->n_dmtime_ticks = ticks;
1146 }
1147 mtx_unlock(&np->n_mtx);
1148 cache_enter(dvp, NULL, cnp);
1149 } else
1150 mtx_unlock(&np->n_mtx);
1151 }
1152 return (ENOENT);
1153 }
1154
1155 /*
1156 * Handle RENAME case...
1157 */
1158 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) {
1159 if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
1160 FREE((caddr_t)nfhp, M_NFSFH);
1161 return (EISDIR);
1162 }
1163 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL);
1164 if (error)
1165 return (error);
1166 newvp = NFSTOV(np);
1167 if (attrflag)
1168 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1169 0, 1);
1170 *vpp = newvp;
1171 cnp->cn_flags |= SAVENAME;
1172 return (0);
1173 }
1174
1175 if (flags & ISDOTDOT) {
1176 ltype = VOP_ISLOCKED(dvp);
1177 error = vfs_busy(mp, MBF_NOWAIT);
1178 if (error != 0) {
1179 vfs_ref(mp);
1180 VOP_UNLOCK(dvp, 0);
1181 error = vfs_busy(mp, 0);
1182 vn_lock(dvp, ltype | LK_RETRY);
1183 vfs_rel(mp);
1184 if (error == 0 && (dvp->v_iflag & VI_DOOMED)) {
1185 vfs_unbusy(mp);
1186 error = ENOENT;
1187 }
1188 if (error != 0)
1189 return (error);
1190 }
1191 VOP_UNLOCK(dvp, 0);
1192 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL);
1193 if (error == 0)
1194 newvp = NFSTOV(np);
1195 vfs_unbusy(mp);
1196 if (newvp != dvp)
1197 vn_lock(dvp, ltype | LK_RETRY);
1198 if (dvp->v_iflag & VI_DOOMED) {
1199 if (error == 0) {
1200 if (newvp == dvp)
1201 vrele(newvp);
1202 else
1203 vput(newvp);
1204 }
1205 error = ENOENT;
1206 }
1207 if (error != 0)
1208 return (error);
1209 if (attrflag)
1210 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1211 0, 1);
1212 } else if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
1213 FREE((caddr_t)nfhp, M_NFSFH);
1214 VREF(dvp);
1215 newvp = dvp;
1216 if (attrflag)
1217 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1218 0, 1);
1219 } else {
1220 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL);
1221 if (error)
1222 return (error);
1223 newvp = NFSTOV(np);
1224 if (attrflag)
1225 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1226 0, 1);
1227 }
1228 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
1229 cnp->cn_flags |= SAVENAME;
1230 if ((cnp->cn_flags & MAKEENTRY) &&
1231 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) {
1232 np->n_ctime = np->n_vattr.na_vattr.va_ctime.tv_sec;
1233 cache_enter(dvp, newvp, cnp);
1234 }
1235 *vpp = newvp;
1236 return (0);
1237 }
1238
1239 /*
1240 * nfs read call.
1241 * Just call ncl_bioread() to do the work.
1242 */
1243 static int
1244 nfs_read(struct vop_read_args *ap)
1245 {
1246 struct vnode *vp = ap->a_vp;
1247
1248 switch (vp->v_type) {
1249 case VREG:
1250 return (ncl_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
1251 case VDIR:
1252 return (EISDIR);
1253 default:
1254 return (EOPNOTSUPP);
1255 }
1256 }
1257
1258 /*
1259 * nfs readlink call
1260 */
1261 static int
1262 nfs_readlink(struct vop_readlink_args *ap)
1263 {
1264 struct vnode *vp = ap->a_vp;
1265
1266 if (vp->v_type != VLNK)
1267 return (EINVAL);
1268 return (ncl_bioread(vp, ap->a_uio, 0, ap->a_cred));
1269 }
1270
1271 /*
1272 * Do a readlink rpc.
1273 * Called by ncl_doio() from below the buffer cache.
1274 */
1275 int
1276 ncl_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1277 {
1278 int error, ret, attrflag;
1279 struct nfsvattr nfsva;
1280
1281 error = nfsrpc_readlink(vp, uiop, cred, uiop->uio_td, &nfsva,
1282 &attrflag, NULL);
1283 if (attrflag) {
1284 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1285 if (ret && !error)
1286 error = ret;
1287 }
1288 if (error && NFS_ISV4(vp))
1289 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1290 return (error);
1291 }
1292
1293 /*
1294 * nfs read rpc call
1295 * Ditto above
1296 */
1297 int
1298 ncl_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1299 {
1300 int error, ret, attrflag;
1301 struct nfsvattr nfsva;
1302
1303 error = nfsrpc_read(vp, uiop, cred, uiop->uio_td, &nfsva, &attrflag,
1304 NULL);
1305 if (attrflag) {
1306 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1307 if (ret && !error)
1308 error = ret;
1309 }
1310 if (error && NFS_ISV4(vp))
1311 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1312 return (error);
1313 }
1314
1315 /*
1316 * nfs write call
1317 */
1318 int
1319 ncl_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
1320 int *iomode, int *must_commit, int called_from_strategy)
1321 {
1322 struct nfsvattr nfsva;
1323 int error = 0, attrflag, ret;
1324 u_char verf[NFSX_VERF];
1325 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1326
1327 *must_commit = 0;
1328 error = nfsrpc_write(vp, uiop, iomode, verf, cred,
1329 uiop->uio_td, &nfsva, &attrflag, NULL, called_from_strategy);
1330 NFSLOCKMNT(nmp);
1331 if (!error && NFSHASWRITEVERF(nmp) &&
1332 NFSBCMP(verf, nmp->nm_verf, NFSX_VERF)) {
1333 *must_commit = 1;
1334 NFSBCOPY(verf, nmp->nm_verf, NFSX_VERF);
1335 }
1336 NFSUNLOCKMNT(nmp);
1337 if (attrflag) {
1338 if (VTONFS(vp)->n_flag & ND_NFSV4)
1339 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 1,
1340 1);
1341 else
1342 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
1343 1);
1344 if (ret && !error)
1345 error = ret;
1346 }
1347 if (vp->v_mount->mnt_kern_flag & MNTK_ASYNC)
1348 *iomode = NFSWRITE_FILESYNC;
1349 if (error && NFS_ISV4(vp))
1350 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1351 return (error);
1352 }
1353
1354 /*
1355 * nfs mknod rpc
1356 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1357 * mode set to specify the file type and the size field for rdev.
1358 */
1359 static int
1360 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1361 struct vattr *vap)
1362 {
1363 struct nfsvattr nfsva, dnfsva;
1364 struct vnode *newvp = NULL;
1365 struct nfsnode *np = NULL, *dnp;
1366 struct nfsfh *nfhp;
1367 struct vattr vattr;
1368 int error = 0, attrflag, dattrflag;
1369 u_int32_t rdev;
1370
1371 if (vap->va_type == VCHR || vap->va_type == VBLK)
1372 rdev = vap->va_rdev;
1373 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1374 rdev = 0xffffffff;
1375 else
1376 return (EOPNOTSUPP);
1377 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1378 return (error);
1379 error = nfsrpc_mknod(dvp, cnp->cn_nameptr, cnp->cn_namelen, vap,
1380 rdev, vap->va_type, cnp->cn_cred, cnp->cn_thread, &dnfsva,
1381 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
1382 if (!error) {
1383 if (!nfhp)
1384 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1385 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1386 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1387 NULL);
1388 if (nfhp)
1389 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1390 cnp->cn_thread, &np, NULL);
1391 }
1392 if (dattrflag)
1393 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1394 if (!error) {
1395 newvp = NFSTOV(np);
1396 if (attrflag)
1397 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1398 0, 1);
1399 }
1400 if (!error) {
1401 if ((cnp->cn_flags & MAKEENTRY))
1402 cache_enter(dvp, newvp, cnp);
1403 *vpp = newvp;
1404 } else if (NFS_ISV4(dvp)) {
1405 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1406 vap->va_gid);
1407 }
1408 dnp = VTONFS(dvp);
1409 mtx_lock(&dnp->n_mtx);
1410 dnp->n_flag |= NMODIFIED;
1411 if (!dattrflag)
1412 dnp->n_attrstamp = 0;
1413 mtx_unlock(&dnp->n_mtx);
1414 return (error);
1415 }
1416
1417 /*
1418 * nfs mknod vop
1419 * just call nfs_mknodrpc() to do the work.
1420 */
1421 /* ARGSUSED */
1422 static int
1423 nfs_mknod(struct vop_mknod_args *ap)
1424 {
1425 return (nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap));
1426 }
1427
1428 static u_long create_verf;
1429 /*
1430 * nfs file create call
1431 */
1432 static int
1433 nfs_create(struct vop_create_args *ap)
1434 {
1435 struct vnode *dvp = ap->a_dvp;
1436 struct vattr *vap = ap->a_vap;
1437 struct componentname *cnp = ap->a_cnp;
1438 struct nfsnode *np = NULL, *dnp;
1439 struct vnode *newvp = NULL;
1440 struct nfsmount *nmp;
1441 struct nfsvattr dnfsva, nfsva;
1442 struct nfsfh *nfhp;
1443 nfsquad_t cverf;
1444 int error = 0, attrflag, dattrflag, fmode = 0;
1445 struct vattr vattr;
1446
1447 /*
1448 * Oops, not for me..
1449 */
1450 if (vap->va_type == VSOCK)
1451 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1452
1453 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1454 return (error);
1455 if (vap->va_vaflags & VA_EXCLUSIVE)
1456 fmode |= O_EXCL;
1457 dnp = VTONFS(dvp);
1458 nmp = VFSTONFS(vnode_mount(dvp));
1459 again:
1460 /* For NFSv4, wait until any remove is done. */
1461 mtx_lock(&dnp->n_mtx);
1462 while (NFSHASNFSV4(nmp) && (dnp->n_flag & NREMOVEINPROG)) {
1463 dnp->n_flag |= NREMOVEWANT;
1464 (void) msleep((caddr_t)dnp, &dnp->n_mtx, PZERO, "nfscrt", 0);
1465 }
1466 mtx_unlock(&dnp->n_mtx);
1467
1468 #ifdef INET
1469 CURVNET_SET(CRED_TO_VNET(cnp->cn_cred));
1470 IN_IFADDR_RLOCK();
1471 if (!TAILQ_EMPTY(&V_in_ifaddrhead))
1472 cverf.lval[0] = IA_SIN(TAILQ_FIRST(&V_in_ifaddrhead))->sin_addr.s_addr;
1473 else
1474 #endif
1475 cverf.lval[0] = create_verf;
1476 #ifdef INET
1477 IN_IFADDR_RUNLOCK();
1478 CURVNET_RESTORE();
1479 #endif
1480 cverf.lval[1] = ++create_verf;
1481 error = nfsrpc_create(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1482 vap, cverf, fmode, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva,
1483 &nfhp, &attrflag, &dattrflag, NULL);
1484 if (!error) {
1485 if (nfhp == NULL)
1486 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1487 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1488 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1489 NULL);
1490 if (nfhp != NULL)
1491 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1492 cnp->cn_thread, &np, NULL);
1493 }
1494 if (dattrflag)
1495 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1496 if (!error) {
1497 newvp = NFSTOV(np);
1498 if (attrflag)
1499 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1500 0, 1);
1501 }
1502 if (error) {
1503 if (newvp != NULL) {
1504 vrele(newvp);
1505 newvp = NULL;
1506 }
1507 if (NFS_ISV34(dvp) && (fmode & O_EXCL) &&
1508 error == NFSERR_NOTSUPP) {
1509 fmode &= ~O_EXCL;
1510 goto again;
1511 }
1512 } else if (NFS_ISV34(dvp) && (fmode & O_EXCL)) {
1513 if (nfscl_checksattr(vap, &nfsva)) {
1514 error = nfsrpc_setattr(newvp, vap, NULL, cnp->cn_cred,
1515 cnp->cn_thread, &nfsva, &attrflag, NULL);
1516 if (error && (vap->va_uid != (uid_t)VNOVAL ||
1517 vap->va_gid != (gid_t)VNOVAL)) {
1518 /* try again without setting uid/gid */
1519 vap->va_uid = (uid_t)VNOVAL;
1520 vap->va_gid = (uid_t)VNOVAL;
1521 error = nfsrpc_setattr(newvp, vap, NULL,
1522 cnp->cn_cred, cnp->cn_thread, &nfsva,
1523 &attrflag, NULL);
1524 }
1525 if (attrflag)
1526 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
1527 NULL, 0, 1);
1528 }
1529 }
1530 if (!error) {
1531 if (cnp->cn_flags & MAKEENTRY)
1532 cache_enter(dvp, newvp, cnp);
1533 *ap->a_vpp = newvp;
1534 } else if (NFS_ISV4(dvp)) {
1535 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1536 vap->va_gid);
1537 }
1538 mtx_lock(&dnp->n_mtx);
1539 dnp->n_flag |= NMODIFIED;
1540 if (!dattrflag)
1541 dnp->n_attrstamp = 0;
1542 mtx_unlock(&dnp->n_mtx);
1543 return (error);
1544 }
1545
1546 /*
1547 * nfs file remove call
1548 * To try and make nfs semantics closer to ufs semantics, a file that has
1549 * other processes using the vnode is renamed instead of removed and then
1550 * removed later on the last close.
1551 * - If v_usecount > 1
1552 * If a rename is not already in the works
1553 * call nfs_sillyrename() to set it up
1554 * else
1555 * do the remove rpc
1556 */
1557 static int
1558 nfs_remove(struct vop_remove_args *ap)
1559 {
1560 struct vnode *vp = ap->a_vp;
1561 struct vnode *dvp = ap->a_dvp;
1562 struct componentname *cnp = ap->a_cnp;
1563 struct nfsnode *np = VTONFS(vp);
1564 int error = 0;
1565 struct vattr vattr;
1566
1567 #ifndef DIAGNOSTIC
1568 if ((cnp->cn_flags & HASBUF) == 0)
1569 panic("nfs_remove: no name");
1570 if (vrefcnt(vp) < 1)
1571 panic("nfs_remove: bad v_usecount");
1572 #endif
1573 if (vp->v_type == VDIR)
1574 error = EPERM;
1575 else if (vrefcnt(vp) == 1 || (np->n_sillyrename &&
1576 VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 &&
1577 vattr.va_nlink > 1)) {
1578 /*
1579 * Purge the name cache so that the chance of a lookup for
1580 * the name succeeding while the remove is in progress is
1581 * minimized. Without node locking it can still happen, such
1582 * that an I/O op returns ESTALE, but since you get this if
1583 * another host removes the file..
1584 */
1585 cache_purge(vp);
1586 /*
1587 * throw away biocache buffers, mainly to avoid
1588 * unnecessary delayed writes later.
1589 */
1590 error = ncl_vinvalbuf(vp, 0, cnp->cn_thread, 1);
1591 /* Do the rpc */
1592 if (error != EINTR && error != EIO)
1593 error = nfs_removerpc(dvp, vp, cnp->cn_nameptr,
1594 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread);
1595 /*
1596 * Kludge City: If the first reply to the remove rpc is lost..
1597 * the reply to the retransmitted request will be ENOENT
1598 * since the file was in fact removed
1599 * Therefore, we cheat and return success.
1600 */
1601 if (error == ENOENT)
1602 error = 0;
1603 } else if (!np->n_sillyrename)
1604 error = nfs_sillyrename(dvp, vp, cnp);
1605 np->n_attrstamp = 0;
1606 return (error);
1607 }
1608
1609 /*
1610 * nfs file remove rpc called from nfs_inactive
1611 */
1612 int
1613 ncl_removeit(struct sillyrename *sp, struct vnode *vp)
1614 {
1615 /*
1616 * Make sure that the directory vnode is still valid.
1617 * XXX we should lock sp->s_dvp here.
1618 */
1619 if (sp->s_dvp->v_type == VBAD)
1620 return (0);
1621 return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen,
1622 sp->s_cred, NULL));
1623 }
1624
1625 /*
1626 * Nfs remove rpc, called from nfs_remove() and ncl_removeit().
1627 */
1628 static int
1629 nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
1630 int namelen, struct ucred *cred, struct thread *td)
1631 {
1632 struct nfsvattr dnfsva;
1633 struct nfsnode *dnp = VTONFS(dvp);
1634 int error = 0, dattrflag;
1635
1636 mtx_lock(&dnp->n_mtx);
1637 dnp->n_flag |= NREMOVEINPROG;
1638 mtx_unlock(&dnp->n_mtx);
1639 error = nfsrpc_remove(dvp, name, namelen, vp, cred, td, &dnfsva,
1640 &dattrflag, NULL);
1641 mtx_lock(&dnp->n_mtx);
1642 if ((dnp->n_flag & NREMOVEWANT)) {
1643 dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG);
1644 mtx_unlock(&dnp->n_mtx);
1645 wakeup((caddr_t)dnp);
1646 } else {
1647 dnp->n_flag &= ~NREMOVEINPROG;
1648 mtx_unlock(&dnp->n_mtx);
1649 }
1650 if (dattrflag)
1651 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1652 mtx_lock(&dnp->n_mtx);
1653 dnp->n_flag |= NMODIFIED;
1654 if (!dattrflag)
1655 dnp->n_attrstamp = 0;
1656 mtx_unlock(&dnp->n_mtx);
1657 if (error && NFS_ISV4(dvp))
1658 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1659 return (error);
1660 }
1661
1662 /*
1663 * nfs file rename call
1664 */
1665 static int
1666 nfs_rename(struct vop_rename_args *ap)
1667 {
1668 struct vnode *fvp = ap->a_fvp;
1669 struct vnode *tvp = ap->a_tvp;
1670 struct vnode *fdvp = ap->a_fdvp;
1671 struct vnode *tdvp = ap->a_tdvp;
1672 struct componentname *tcnp = ap->a_tcnp;
1673 struct componentname *fcnp = ap->a_fcnp;
1674 struct nfsnode *fnp = VTONFS(ap->a_fvp);
1675 struct nfsnode *tdnp = VTONFS(ap->a_tdvp);
1676 struct nfsv4node *newv4 = NULL;
1677 int error;
1678
1679 #ifndef DIAGNOSTIC
1680 if ((tcnp->cn_flags & HASBUF) == 0 ||
1681 (fcnp->cn_flags & HASBUF) == 0)
1682 panic("nfs_rename: no name");
1683 #endif
1684 /* Check for cross-device rename */
1685 if ((fvp->v_mount != tdvp->v_mount) ||
1686 (tvp && (fvp->v_mount != tvp->v_mount))) {
1687 error = EXDEV;
1688 goto out;
1689 }
1690
1691 if (fvp == tvp) {
1692 ncl_printf("nfs_rename: fvp == tvp (can't happen)\n");
1693 error = 0;
1694 goto out;
1695 }
1696 if ((error = vn_lock(fvp, LK_EXCLUSIVE)))
1697 goto out;
1698
1699 /*
1700 * We have to flush B_DELWRI data prior to renaming
1701 * the file. If we don't, the delayed-write buffers
1702 * can be flushed out later after the file has gone stale
1703 * under NFSV3. NFSV2 does not have this problem because
1704 * ( as far as I can tell ) it flushes dirty buffers more
1705 * often.
1706 *
1707 * Skip the rename operation if the fsync fails, this can happen
1708 * due to the server's volume being full, when we pushed out data
1709 * that was written back to our cache earlier. Not checking for
1710 * this condition can result in potential (silent) data loss.
1711 */
1712 error = VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_thread);
1713 VOP_UNLOCK(fvp, 0);
1714 if (!error && tvp)
1715 error = VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_thread);
1716 if (error)
1717 goto out;
1718
1719 /*
1720 * If the tvp exists and is in use, sillyrename it before doing the
1721 * rename of the new file over it.
1722 * XXX Can't sillyrename a directory.
1723 */
1724 if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename &&
1725 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1726 vput(tvp);
1727 tvp = NULL;
1728 }
1729
1730 error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1731 tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1732 tcnp->cn_thread);
1733
1734 if (!error) {
1735 /*
1736 * For NFSv4, check to see if it is the same name and
1737 * replace the name, if it is different.
1738 */
1739 MALLOC(newv4, struct nfsv4node *,
1740 sizeof (struct nfsv4node) +
1741 tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1,
1742 M_NFSV4NODE, M_WAITOK);
1743 mtx_lock(&tdnp->n_mtx);
1744 mtx_lock(&fnp->n_mtx);
1745 if (fnp->n_v4 != NULL && fvp->v_type == VREG &&
1746 (fnp->n_v4->n4_namelen != tcnp->cn_namelen ||
1747 NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4),
1748 tcnp->cn_namelen) ||
1749 tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen ||
1750 NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1751 tdnp->n_fhp->nfh_len))) {
1752 #ifdef notdef
1753 { char nnn[100]; int nnnl;
1754 nnnl = (tcnp->cn_namelen < 100) ? tcnp->cn_namelen : 99;
1755 bcopy(tcnp->cn_nameptr, nnn, nnnl);
1756 nnn[nnnl] = '\0';
1757 printf("ren replace=%s\n",nnn);
1758 }
1759 #endif
1760 FREE((caddr_t)fnp->n_v4, M_NFSV4NODE);
1761 fnp->n_v4 = newv4;
1762 newv4 = NULL;
1763 fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len;
1764 fnp->n_v4->n4_namelen = tcnp->cn_namelen;
1765 NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1766 tdnp->n_fhp->nfh_len);
1767 NFSBCOPY(tcnp->cn_nameptr,
1768 NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen);
1769 }
1770 mtx_unlock(&tdnp->n_mtx);
1771 mtx_unlock(&fnp->n_mtx);
1772 if (newv4 != NULL)
1773 FREE((caddr_t)newv4, M_NFSV4NODE);
1774 }
1775
1776 if (fvp->v_type == VDIR) {
1777 if (tvp != NULL && tvp->v_type == VDIR)
1778 cache_purge(tdvp);
1779 cache_purge(fdvp);
1780 }
1781
1782 out:
1783 if (tdvp == tvp)
1784 vrele(tdvp);
1785 else
1786 vput(tdvp);
1787 if (tvp)
1788 vput(tvp);
1789 vrele(fdvp);
1790 vrele(fvp);
1791 /*
1792 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1793 */
1794 if (error == ENOENT)
1795 error = 0;
1796 return (error);
1797 }
1798
1799 /*
1800 * nfs file rename rpc called from nfs_remove() above
1801 */
1802 static int
1803 nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp,
1804 struct sillyrename *sp)
1805 {
1806
1807 return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen,
1808 sdvp, NULL, sp->s_name, sp->s_namlen, scnp->cn_cred,
1809 scnp->cn_thread));
1810 }
1811
1812 /*
1813 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1814 */
1815 static int
1816 nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr,
1817 int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr,
1818 int tnamelen, struct ucred *cred, struct thread *td)
1819 {
1820 struct nfsvattr fnfsva, tnfsva;
1821 struct nfsnode *fdnp = VTONFS(fdvp);
1822 struct nfsnode *tdnp = VTONFS(tdvp);
1823 int error = 0, fattrflag, tattrflag;
1824
1825 error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp,
1826 tnameptr, tnamelen, cred, td, &fnfsva, &tnfsva, &fattrflag,
1827 &tattrflag, NULL, NULL);
1828 mtx_lock(&fdnp->n_mtx);
1829 fdnp->n_flag |= NMODIFIED;
1830 mtx_unlock(&fdnp->n_mtx);
1831 mtx_lock(&tdnp->n_mtx);
1832 tdnp->n_flag |= NMODIFIED;
1833 mtx_unlock(&tdnp->n_mtx);
1834 if (fattrflag)
1835 (void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, NULL, 0, 1);
1836 else
1837 fdnp->n_attrstamp = 0;
1838 if (tattrflag)
1839 (void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, NULL, 0, 1);
1840 else
1841 tdnp->n_attrstamp = 0;
1842 if (error && NFS_ISV4(fdvp))
1843 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1844 return (error);
1845 }
1846
1847 /*
1848 * nfs hard link create call
1849 */
1850 static int
1851 nfs_link(struct vop_link_args *ap)
1852 {
1853 struct vnode *vp = ap->a_vp;
1854 struct vnode *tdvp = ap->a_tdvp;
1855 struct componentname *cnp = ap->a_cnp;
1856 struct nfsnode *tdnp;
1857 struct nfsvattr nfsva, dnfsva;
1858 int error = 0, attrflag, dattrflag;
1859
1860 if (vp->v_mount != tdvp->v_mount) {
1861 return (EXDEV);
1862 }
1863
1864 /*
1865 * Push all writes to the server, so that the attribute cache
1866 * doesn't get "out of sync" with the server.
1867 * XXX There should be a better way!
1868 */
1869 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_thread);
1870
1871 error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen,
1872 cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &attrflag,
1873 &dattrflag, NULL);
1874 tdnp = VTONFS(tdvp);
1875 mtx_lock(&tdnp->n_mtx);
1876 tdnp->n_flag |= NMODIFIED;
1877 mtx_unlock(&tdnp->n_mtx);
1878 if (attrflag)
1879 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1880 else
1881 VTONFS(vp)->n_attrstamp = 0;
1882 if (dattrflag)
1883 (void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, NULL, 0, 1);
1884 else
1885 tdnp->n_attrstamp = 0;
1886 /*
1887 * If negative lookup caching is enabled, I might as well
1888 * add an entry for this node. Not necessary for correctness,
1889 * but if negative caching is enabled, then the system
1890 * must care about lookup caching hit rate, so...
1891 */
1892 if (VFSTONFS(vp->v_mount)->nm_negnametimeo != 0 &&
1893 (cnp->cn_flags & MAKEENTRY))
1894 cache_enter(tdvp, vp, cnp);
1895 if (error && NFS_ISV4(vp))
1896 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
1897 (gid_t)0);
1898 return (error);
1899 }
1900
1901 /*
1902 * nfs symbolic link create call
1903 */
1904 static int
1905 nfs_symlink(struct vop_symlink_args *ap)
1906 {
1907 struct vnode *dvp = ap->a_dvp;
1908 struct vattr *vap = ap->a_vap;
1909 struct componentname *cnp = ap->a_cnp;
1910 struct nfsvattr nfsva, dnfsva;
1911 struct nfsfh *nfhp;
1912 struct nfsnode *np = NULL, *dnp;
1913 struct vnode *newvp = NULL;
1914 int error = 0, attrflag, dattrflag, ret;
1915
1916 vap->va_type = VLNK;
1917 error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1918 ap->a_target, vap, cnp->cn_cred, cnp->cn_thread, &dnfsva,
1919 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
1920 if (nfhp) {
1921 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
1922 &np, NULL);
1923 if (!ret)
1924 newvp = NFSTOV(np);
1925 else if (!error)
1926 error = ret;
1927 }
1928 if (newvp != NULL) {
1929 if (attrflag)
1930 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1931 0, 1);
1932 } else if (!error) {
1933 /*
1934 * If we do not have an error and we could not extract the
1935 * newvp from the response due to the request being NFSv2, we
1936 * have to do a lookup in order to obtain a newvp to return.
1937 */
1938 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1939 cnp->cn_cred, cnp->cn_thread, &np);
1940 if (!error)
1941 newvp = NFSTOV(np);
1942 }
1943 if (error) {
1944 if (newvp)
1945 vput(newvp);
1946 if (NFS_ISV4(dvp))
1947 error = nfscl_maperr(cnp->cn_thread, error,
1948 vap->va_uid, vap->va_gid);
1949 } else {
1950 /*
1951 * If negative lookup caching is enabled, I might as well
1952 * add an entry for this node. Not necessary for correctness,
1953 * but if negative caching is enabled, then the system
1954 * must care about lookup caching hit rate, so...
1955 */
1956 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
1957 (cnp->cn_flags & MAKEENTRY))
1958 cache_enter(dvp, newvp, cnp);
1959 *ap->a_vpp = newvp;
1960 }
1961
1962 dnp = VTONFS(dvp);
1963 mtx_lock(&dnp->n_mtx);
1964 dnp->n_flag |= NMODIFIED;
1965 mtx_unlock(&dnp->n_mtx);
1966 if (dattrflag)
1967 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1968 else
1969 dnp->n_attrstamp = 0;
1970 return (error);
1971 }
1972
1973 /*
1974 * nfs make dir call
1975 */
1976 static int
1977 nfs_mkdir(struct vop_mkdir_args *ap)
1978 {
1979 struct vnode *dvp = ap->a_dvp;
1980 struct vattr *vap = ap->a_vap;
1981 struct componentname *cnp = ap->a_cnp;
1982 struct nfsnode *np = NULL, *dnp;
1983 struct vnode *newvp = NULL;
1984 struct vattr vattr;
1985 struct nfsfh *nfhp;
1986 struct nfsvattr nfsva, dnfsva;
1987 int error = 0, attrflag, dattrflag, ret;
1988
1989 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1990 return (error);
1991 vap->va_type = VDIR;
1992 error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1993 vap, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &nfhp,
1994 &attrflag, &dattrflag, NULL);
1995 dnp = VTONFS(dvp);
1996 mtx_lock(&dnp->n_mtx);
1997 dnp->n_flag |= NMODIFIED;
1998 mtx_unlock(&dnp->n_mtx);
1999 if (dattrflag)
2000 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2001 else
2002 dnp->n_attrstamp = 0;
2003 if (nfhp) {
2004 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
2005 &np, NULL);
2006 if (!ret) {
2007 newvp = NFSTOV(np);
2008 if (attrflag)
2009 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
2010 NULL, 0, 1);
2011 } else if (!error)
2012 error = ret;
2013 }
2014 if (!error && newvp == NULL) {
2015 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2016 cnp->cn_cred, cnp->cn_thread, &np);
2017 if (!error) {
2018 newvp = NFSTOV(np);
2019 if (newvp->v_type != VDIR)
2020 error = EEXIST;
2021 }
2022 }
2023 if (error) {
2024 if (newvp)
2025 vput(newvp);
2026 if (NFS_ISV4(dvp))
2027 error = nfscl_maperr(cnp->cn_thread, error,
2028 vap->va_uid, vap->va_gid);
2029 } else {
2030 /*
2031 * If negative lookup caching is enabled, I might as well
2032 * add an entry for this node. Not necessary for correctness,
2033 * but if negative caching is enabled, then the system
2034 * must care about lookup caching hit rate, so...
2035 */
2036 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
2037 (cnp->cn_flags & MAKEENTRY))
2038 cache_enter(dvp, newvp, cnp);
2039 *ap->a_vpp = newvp;
2040 }
2041 return (error);
2042 }
2043
2044 /*
2045 * nfs remove directory call
2046 */
2047 static int
2048 nfs_rmdir(struct vop_rmdir_args *ap)
2049 {
2050 struct vnode *vp = ap->a_vp;
2051 struct vnode *dvp = ap->a_dvp;
2052 struct componentname *cnp = ap->a_cnp;
2053 struct nfsnode *dnp;
2054 struct nfsvattr dnfsva;
2055 int error, dattrflag;
2056
2057 if (dvp == vp)
2058 return (EINVAL);
2059 error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2060 cnp->cn_cred, cnp->cn_thread, &dnfsva, &dattrflag, NULL);
2061 dnp = VTONFS(dvp);
2062 mtx_lock(&dnp->n_mtx);
2063 dnp->n_flag |= NMODIFIED;
2064 mtx_unlock(&dnp->n_mtx);
2065 if (dattrflag)
2066 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2067 else
2068 dnp->n_attrstamp = 0;
2069
2070 cache_purge(dvp);
2071 cache_purge(vp);
2072 if (error && NFS_ISV4(dvp))
2073 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
2074 (gid_t)0);
2075 /*
2076 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2077 */
2078 if (error == ENOENT)
2079 error = 0;
2080 return (error);
2081 }
2082
2083 /*
2084 * nfs readdir call
2085 */
2086 static int
2087 nfs_readdir(struct vop_readdir_args *ap)
2088 {
2089 struct vnode *vp = ap->a_vp;
2090 struct nfsnode *np = VTONFS(vp);
2091 struct uio *uio = ap->a_uio;
2092 int tresid, error = 0;
2093 struct vattr vattr;
2094
2095 if (vp->v_type != VDIR)
2096 return(EPERM);
2097
2098 /*
2099 * First, check for hit on the EOF offset cache
2100 */
2101 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2102 (np->n_flag & NMODIFIED) == 0) {
2103 if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) {
2104 mtx_lock(&np->n_mtx);
2105 if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) ||
2106 !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
2107 mtx_unlock(&np->n_mtx);
2108 NFSINCRGLOBAL(newnfsstats.direofcache_hits);
2109 return (0);
2110 } else
2111 mtx_unlock(&np->n_mtx);
2112 }
2113 }
2114
2115 /*
2116 * Call ncl_bioread() to do the real work.
2117 */
2118 tresid = uio->uio_resid;
2119 error = ncl_bioread(vp, uio, 0, ap->a_cred);
2120
2121 if (!error && uio->uio_resid == tresid)
2122 NFSINCRGLOBAL(newnfsstats.direofcache_misses);
2123 return (error);
2124 }
2125
2126 /*
2127 * Readdir rpc call.
2128 * Called from below the buffer cache by ncl_doio().
2129 */
2130 int
2131 ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2132 struct thread *td)
2133 {
2134 struct nfsvattr nfsva;
2135 nfsuint64 *cookiep, cookie;
2136 struct nfsnode *dnp = VTONFS(vp);
2137 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2138 int error = 0, eof, attrflag;
2139
2140 #ifndef DIAGNOSTIC
2141 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2142 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2143 panic("nfs readdirrpc bad uio");
2144 #endif
2145
2146 /*
2147 * If there is no cookie, assume directory was stale.
2148 */
2149 ncl_dircookie_lock(dnp);
2150 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2151 if (cookiep) {
2152 cookie = *cookiep;
2153 ncl_dircookie_unlock(dnp);
2154 } else {
2155 ncl_dircookie_unlock(dnp);
2156 return (NFSERR_BAD_COOKIE);
2157 }
2158
2159 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2160 (void)ncl_fsinfo(nmp, vp, cred, td);
2161
2162 error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva,
2163 &attrflag, &eof, NULL);
2164 if (attrflag)
2165 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2166
2167 if (!error) {
2168 /*
2169 * We are now either at the end of the directory or have filled
2170 * the block.
2171 */
2172 if (eof)
2173 dnp->n_direofoffset = uiop->uio_offset;
2174 else {
2175 if (uiop->uio_resid > 0)
2176 ncl_printf("EEK! readdirrpc resid > 0\n");
2177 ncl_dircookie_lock(dnp);
2178 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2179 *cookiep = cookie;
2180 ncl_dircookie_unlock(dnp);
2181 }
2182 } else if (NFS_ISV4(vp)) {
2183 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2184 }
2185 return (error);
2186 }
2187
2188 /*
2189 * NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc().
2190 */
2191 int
2192 ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2193 struct thread *td)
2194 {
2195 struct nfsvattr nfsva;
2196 nfsuint64 *cookiep, cookie;
2197 struct nfsnode *dnp = VTONFS(vp);
2198 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2199 int error = 0, attrflag, eof;
2200
2201 #ifndef DIAGNOSTIC
2202 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2203 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2204 panic("nfs readdirplusrpc bad uio");
2205 #endif
2206
2207 /*
2208 * If there is no cookie, assume directory was stale.
2209 */
2210 ncl_dircookie_lock(dnp);
2211 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2212 if (cookiep) {
2213 cookie = *cookiep;
2214 ncl_dircookie_unlock(dnp);
2215 } else {
2216 ncl_dircookie_unlock(dnp);
2217 return (NFSERR_BAD_COOKIE);
2218 }
2219
2220 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2221 (void)ncl_fsinfo(nmp, vp, cred, td);
2222 error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva,
2223 &attrflag, &eof, NULL);
2224 if (attrflag)
2225 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2226
2227 if (!error) {
2228 /*
2229 * We are now either at end of the directory or have filled the
2230 * the block.
2231 */
2232 if (eof)
2233 dnp->n_direofoffset = uiop->uio_offset;
2234 else {
2235 if (uiop->uio_resid > 0)
2236 ncl_printf("EEK! readdirplusrpc resid > 0\n");
2237 ncl_dircookie_lock(dnp);
2238 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2239 *cookiep = cookie;
2240 ncl_dircookie_unlock(dnp);
2241 }
2242 } else if (NFS_ISV4(vp)) {
2243 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2244 }
2245 return (error);
2246 }
2247
2248 /*
2249 * Silly rename. To make the NFS filesystem that is stateless look a little
2250 * more like the "ufs" a remove of an active vnode is translated to a rename
2251 * to a funny looking filename that is removed by nfs_inactive on the
2252 * nfsnode. There is the potential for another process on a different client
2253 * to create the same funny name between the nfs_lookitup() fails and the
2254 * nfs_rename() completes, but...
2255 */
2256 static int
2257 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2258 {
2259 struct sillyrename *sp;
2260 struct nfsnode *np;
2261 int error;
2262 short pid;
2263 unsigned int lticks;
2264
2265 cache_purge(dvp);
2266 np = VTONFS(vp);
2267 #ifndef DIAGNOSTIC
2268 if (vp->v_type == VDIR)
2269 panic("nfs: sillyrename dir");
2270 #endif
2271 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2272 M_NEWNFSREQ, M_WAITOK);
2273 sp->s_cred = crhold(cnp->cn_cred);
2274 sp->s_dvp = dvp;
2275 VREF(dvp);
2276
2277 /*
2278 * Fudge together a funny name.
2279 * Changing the format of the funny name to accomodate more
2280 * sillynames per directory.
2281 * The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is
2282 * CPU ticks since boot.
2283 */
2284 pid = cnp->cn_thread->td_proc->p_pid;
2285 lticks = (unsigned int)ticks;
2286 for ( ; ; ) {
2287 sp->s_namlen = sprintf(sp->s_name,
2288 ".nfs.%08x.%04x4.4", lticks,
2289 pid);
2290 if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2291 cnp->cn_thread, NULL))
2292 break;
2293 lticks++;
2294 }
2295 error = nfs_renameit(dvp, vp, cnp, sp);
2296 if (error)
2297 goto bad;
2298 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2299 cnp->cn_thread, &np);
2300 np->n_sillyrename = sp;
2301 return (0);
2302 bad:
2303 vrele(sp->s_dvp);
2304 crfree(sp->s_cred);
2305 free((caddr_t)sp, M_NEWNFSREQ);
2306 return (error);
2307 }
2308
2309 /*
2310 * Look up a file name and optionally either update the file handle or
2311 * allocate an nfsnode, depending on the value of npp.
2312 * npp == NULL --> just do the lookup
2313 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2314 * handled too
2315 * *npp != NULL --> update the file handle in the vnode
2316 */
2317 static int
2318 nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred,
2319 struct thread *td, struct nfsnode **npp)
2320 {
2321 struct vnode *newvp = NULL, *vp;
2322 struct nfsnode *np, *dnp = VTONFS(dvp);
2323 struct nfsfh *nfhp, *onfhp;
2324 struct nfsvattr nfsva, dnfsva;
2325 struct componentname cn;
2326 int error = 0, attrflag, dattrflag;
2327 u_int hash;
2328
2329 error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva,
2330 &nfhp, &attrflag, &dattrflag, NULL);
2331 if (dattrflag)
2332 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2333 if (npp && !error) {
2334 if (*npp != NULL) {
2335 np = *npp;
2336 vp = NFSTOV(np);
2337 /*
2338 * For NFSv4, check to see if it is the same name and
2339 * replace the name, if it is different.
2340 */
2341 if (np->n_v4 != NULL && nfsva.na_type == VREG &&
2342 (np->n_v4->n4_namelen != len ||
2343 NFSBCMP(name, NFS4NODENAME(np->n_v4), len) ||
2344 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
2345 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2346 dnp->n_fhp->nfh_len))) {
2347 #ifdef notdef
2348 { char nnn[100]; int nnnl;
2349 nnnl = (len < 100) ? len : 99;
2350 bcopy(name, nnn, nnnl);
2351 nnn[nnnl] = '\0';
2352 printf("replace=%s\n",nnn);
2353 }
2354 #endif
2355 FREE((caddr_t)np->n_v4, M_NFSV4NODE);
2356 MALLOC(np->n_v4, struct nfsv4node *,
2357 sizeof (struct nfsv4node) +
2358 dnp->n_fhp->nfh_len + len - 1,
2359 M_NFSV4NODE, M_WAITOK);
2360 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
2361 np->n_v4->n4_namelen = len;
2362 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2363 dnp->n_fhp->nfh_len);
2364 NFSBCOPY(name, NFS4NODENAME(np->n_v4), len);
2365 }
2366 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len,
2367 FNV1_32_INIT);
2368 onfhp = np->n_fhp;
2369 /*
2370 * Rehash node for new file handle.
2371 */
2372 vfs_hash_rehash(vp, hash);
2373 np->n_fhp = nfhp;
2374 if (onfhp != NULL)
2375 FREE((caddr_t)onfhp, M_NFSFH);
2376 newvp = NFSTOV(np);
2377 } else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) {
2378 FREE((caddr_t)nfhp, M_NFSFH);
2379 VREF(dvp);
2380 newvp = dvp;
2381 } else {
2382 cn.cn_nameptr = name;
2383 cn.cn_namelen = len;
2384 error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td,
2385 &np, NULL);
2386 if (error)
2387 return (error);
2388 newvp = NFSTOV(np);
2389 }
2390 if (!attrflag && *npp == NULL) {
2391 vrele(newvp);
2392 return (ENOENT);
2393 }
2394 if (attrflag)
2395 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2396 0, 1);
2397 }
2398 if (npp && *npp == NULL) {
2399 if (error) {
2400 if (newvp) {
2401 if (newvp == dvp)
2402 vrele(newvp);
2403 else
2404 vput(newvp);
2405 }
2406 } else
2407 *npp = np;
2408 }
2409 if (error && NFS_ISV4(dvp))
2410 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2411 return (error);
2412 }
2413
2414 /*
2415 * Nfs Version 3 and 4 commit rpc
2416 */
2417 int
2418 ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred,
2419 struct thread *td)
2420 {
2421 struct nfsvattr nfsva;
2422 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2423 int error, attrflag;
2424 u_char verf[NFSX_VERF];
2425
2426 mtx_lock(&nmp->nm_mtx);
2427 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) {
2428 mtx_unlock(&nmp->nm_mtx);
2429 return (0);
2430 }
2431 mtx_unlock(&nmp->nm_mtx);
2432 error = nfsrpc_commit(vp, offset, cnt, cred, td, verf, &nfsva,
2433 &attrflag, NULL);
2434 if (!error) {
2435 if (NFSBCMP((caddr_t)nmp->nm_verf, verf, NFSX_VERF)) {
2436 NFSBCOPY(verf, (caddr_t)nmp->nm_verf, NFSX_VERF);
2437 error = NFSERR_STALEWRITEVERF;
2438 }
2439 if (!error && attrflag)
2440 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL,
2441 0, 1);
2442 } else if (NFS_ISV4(vp)) {
2443 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2444 }
2445 return (error);
2446 }
2447
2448 /*
2449 * Strategy routine.
2450 * For async requests when nfsiod(s) are running, queue the request by
2451 * calling ncl_asyncio(), otherwise just all ncl_doio() to do the
2452 * request.
2453 */
2454 static int
2455 nfs_strategy(struct vop_strategy_args *ap)
2456 {
2457 struct buf *bp = ap->a_bp;
2458 struct ucred *cr;
2459
2460 KASSERT(!(bp->b_flags & B_DONE),
2461 ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2462 BUF_ASSERT_HELD(bp);
2463
2464 if (bp->b_iocmd == BIO_READ)
2465 cr = bp->b_rcred;
2466 else
2467 cr = bp->b_wcred;
2468
2469 /*
2470 * If the op is asynchronous and an i/o daemon is waiting
2471 * queue the request, wake it up and wait for completion
2472 * otherwise just do it ourselves.
2473 */
2474 if ((bp->b_flags & B_ASYNC) == 0 ||
2475 ncl_asyncio(VFSTONFS(ap->a_vp->v_mount), bp, NOCRED, curthread))
2476 (void) ncl_doio(ap->a_vp, bp, cr, curthread, 1);
2477 return (0);
2478 }
2479
2480 /*
2481 * fsync vnode op. Just call ncl_flush() with commit == 1.
2482 */
2483 /* ARGSUSED */
2484 static int
2485 nfs_fsync(struct vop_fsync_args *ap)
2486 {
2487 return (ncl_flush(ap->a_vp, ap->a_waitfor, NULL, ap->a_td, 1, 0));
2488 }
2489
2490 /*
2491 * Flush all the blocks associated with a vnode.
2492 * Walk through the buffer pool and push any dirty pages
2493 * associated with the vnode.
2494 * If the called_from_renewthread argument is TRUE, it has been called
2495 * from the NFSv4 renew thread and, as such, cannot block indefinitely
2496 * waiting for a buffer write to complete.
2497 */
2498 int
2499 ncl_flush(struct vnode *vp, int waitfor, struct ucred *cred, struct thread *td,
2500 int commit, int called_from_renewthread)
2501 {
2502 struct nfsnode *np = VTONFS(vp);
2503 struct buf *bp;
2504 int i;
2505 struct buf *nbp;
2506 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2507 int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2508 int passone = 1, trycnt = 0;
2509 u_quad_t off, endoff, toff;
2510 struct ucred* wcred = NULL;
2511 struct buf **bvec = NULL;
2512 struct bufobj *bo;
2513 #ifndef NFS_COMMITBVECSIZ
2514 #define NFS_COMMITBVECSIZ 20
2515 #endif
2516 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2517 int bvecsize = 0, bveccount;
2518
2519 if (called_from_renewthread != 0)
2520 slptimeo = hz;
2521 if (nmp->nm_flag & NFSMNT_INT)
2522 slpflag = NFS_PCATCH;
2523 if (!commit)
2524 passone = 0;
2525 bo = &vp->v_bufobj;
2526 /*
2527 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2528 * server, but has not been committed to stable storage on the server
2529 * yet. On the first pass, the byte range is worked out and the commit
2530 * rpc is done. On the second pass, ncl_writebp() is called to do the
2531 * job.
2532 */
2533 again:
2534 off = (u_quad_t)-1;
2535 endoff = 0;
2536 bvecpos = 0;
2537 if (NFS_ISV34(vp) && commit) {
2538 if (bvec != NULL && bvec != bvec_on_stack)
2539 free(bvec, M_TEMP);
2540 /*
2541 * Count up how many buffers waiting for a commit.
2542 */
2543 bveccount = 0;
2544 BO_LOCK(bo);
2545 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2546 if (!BUF_ISLOCKED(bp) &&
2547 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2548 == (B_DELWRI | B_NEEDCOMMIT))
2549 bveccount++;
2550 }
2551 /*
2552 * Allocate space to remember the list of bufs to commit. It is
2553 * important to use M_NOWAIT here to avoid a race with nfs_write.
2554 * If we can't get memory (for whatever reason), we will end up
2555 * committing the buffers one-by-one in the loop below.
2556 */
2557 if (bveccount > NFS_COMMITBVECSIZ) {
2558 /*
2559 * Release the vnode interlock to avoid a lock
2560 * order reversal.
2561 */
2562 BO_UNLOCK(bo);
2563 bvec = (struct buf **)
2564 malloc(bveccount * sizeof(struct buf *),
2565 M_TEMP, M_NOWAIT);
2566 BO_LOCK(bo);
2567 if (bvec == NULL) {
2568 bvec = bvec_on_stack;
2569 bvecsize = NFS_COMMITBVECSIZ;
2570 } else
2571 bvecsize = bveccount;
2572 } else {
2573 bvec = bvec_on_stack;
2574 bvecsize = NFS_COMMITBVECSIZ;
2575 }
2576 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2577 if (bvecpos >= bvecsize)
2578 break;
2579 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2580 nbp = TAILQ_NEXT(bp, b_bobufs);
2581 continue;
2582 }
2583 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2584 (B_DELWRI | B_NEEDCOMMIT)) {
2585 BUF_UNLOCK(bp);
2586 nbp = TAILQ_NEXT(bp, b_bobufs);
2587 continue;
2588 }
2589 BO_UNLOCK(bo);
2590 bremfree(bp);
2591 /*
2592 * Work out if all buffers are using the same cred
2593 * so we can deal with them all with one commit.
2594 *
2595 * NOTE: we are not clearing B_DONE here, so we have
2596 * to do it later on in this routine if we intend to
2597 * initiate I/O on the bp.
2598 *
2599 * Note: to avoid loopback deadlocks, we do not
2600 * assign b_runningbufspace.
2601 */
2602 if (wcred == NULL)
2603 wcred = bp->b_wcred;
2604 else if (wcred != bp->b_wcred)
2605 wcred = NOCRED;
2606 vfs_busy_pages(bp, 1);
2607
2608 BO_LOCK(bo);
2609 /*
2610 * bp is protected by being locked, but nbp is not
2611 * and vfs_busy_pages() may sleep. We have to
2612 * recalculate nbp.
2613 */
2614 nbp = TAILQ_NEXT(bp, b_bobufs);
2615
2616 /*
2617 * A list of these buffers is kept so that the
2618 * second loop knows which buffers have actually
2619 * been committed. This is necessary, since there
2620 * may be a race between the commit rpc and new
2621 * uncommitted writes on the file.
2622 */
2623 bvec[bvecpos++] = bp;
2624 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2625 bp->b_dirtyoff;
2626 if (toff < off)
2627 off = toff;
2628 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2629 if (toff > endoff)
2630 endoff = toff;
2631 }
2632 BO_UNLOCK(bo);
2633 }
2634 if (bvecpos > 0) {
2635 /*
2636 * Commit data on the server, as required.
2637 * If all bufs are using the same wcred, then use that with
2638 * one call for all of them, otherwise commit each one
2639 * separately.
2640 */
2641 if (wcred != NOCRED)
2642 retv = ncl_commit(vp, off, (int)(endoff - off),
2643 wcred, td);
2644 else {
2645 retv = 0;
2646 for (i = 0; i < bvecpos; i++) {
2647 off_t off, size;
2648 bp = bvec[i];
2649 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2650 bp->b_dirtyoff;
2651 size = (u_quad_t)(bp->b_dirtyend
2652 - bp->b_dirtyoff);
2653 retv = ncl_commit(vp, off, (int)size,
2654 bp->b_wcred, td);
2655 if (retv) break;
2656 }
2657 }
2658
2659 if (retv == NFSERR_STALEWRITEVERF)
2660 ncl_clearcommit(vp->v_mount);
2661
2662 /*
2663 * Now, either mark the blocks I/O done or mark the
2664 * blocks dirty, depending on whether the commit
2665 * succeeded.
2666 */
2667 for (i = 0; i < bvecpos; i++) {
2668 bp = bvec[i];
2669 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
2670 if (retv) {
2671 /*
2672 * Error, leave B_DELWRI intact
2673 */
2674 vfs_unbusy_pages(bp);
2675 brelse(bp);
2676 } else {
2677 /*
2678 * Success, remove B_DELWRI ( bundirty() ).
2679 *
2680 * b_dirtyoff/b_dirtyend seem to be NFS
2681 * specific. We should probably move that
2682 * into bundirty(). XXX
2683 */
2684 bufobj_wref(bo);
2685 bp->b_flags |= B_ASYNC;
2686 bundirty(bp);
2687 bp->b_flags &= ~B_DONE;
2688 bp->b_ioflags &= ~BIO_ERROR;
2689 bp->b_dirtyoff = bp->b_dirtyend = 0;
2690 bufdone(bp);
2691 }
2692 }
2693 }
2694
2695 /*
2696 * Start/do any write(s) that are required.
2697 */
2698 loop:
2699 BO_LOCK(bo);
2700 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2701 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2702 if (waitfor != MNT_WAIT || passone)
2703 continue;
2704
2705 error = BUF_TIMELOCK(bp,
2706 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK,
2707 BO_MTX(bo), "nfsfsync", slpflag, slptimeo);
2708 if (error == 0) {
2709 BUF_UNLOCK(bp);
2710 goto loop;
2711 }
2712 if (error == ENOLCK) {
2713 error = 0;
2714 goto loop;
2715 }
2716 if (called_from_renewthread != 0) {
2717 /*
2718 * Return EIO so the flush will be retried
2719 * later.
2720 */
2721 error = EIO;
2722 goto done;
2723 }
2724 if (newnfs_sigintr(nmp, td)) {
2725 error = EINTR;
2726 goto done;
2727 }
2728 if (slpflag & PCATCH) {
2729 slpflag = 0;
2730 slptimeo = 2 * hz;
2731 }
2732 goto loop;
2733 }
2734 if ((bp->b_flags & B_DELWRI) == 0)
2735 panic("nfs_fsync: not dirty");
2736 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
2737 BUF_UNLOCK(bp);
2738 continue;
2739 }
2740 BO_UNLOCK(bo);
2741 bremfree(bp);
2742 if (passone || !commit)
2743 bp->b_flags |= B_ASYNC;
2744 else
2745 bp->b_flags |= B_ASYNC;
2746 bwrite(bp);
2747 if (newnfs_sigintr(nmp, td)) {
2748 error = EINTR;
2749 goto done;
2750 }
2751 goto loop;
2752 }
2753 if (passone) {
2754 passone = 0;
2755 BO_UNLOCK(bo);
2756 goto again;
2757 }
2758 if (waitfor == MNT_WAIT) {
2759 while (bo->bo_numoutput) {
2760 error = bufobj_wwait(bo, slpflag, slptimeo);
2761 if (error) {
2762 BO_UNLOCK(bo);
2763 if (called_from_renewthread != 0) {
2764 /*
2765 * Return EIO so that the flush will be
2766 * retried later.
2767 */
2768 error = EIO;
2769 goto done;
2770 }
2771 error = newnfs_sigintr(nmp, td);
2772 if (error)
2773 goto done;
2774 if (slpflag & PCATCH) {
2775 slpflag = 0;
2776 slptimeo = 2 * hz;
2777 }
2778 BO_LOCK(bo);
2779 }
2780 }
2781 if (bo->bo_dirty.bv_cnt != 0 && commit) {
2782 BO_UNLOCK(bo);
2783 goto loop;
2784 }
2785 /*
2786 * Wait for all the async IO requests to drain
2787 */
2788 BO_UNLOCK(bo);
2789 mtx_lock(&np->n_mtx);
2790 while (np->n_directio_asyncwr > 0) {
2791 np->n_flag |= NFSYNCWAIT;
2792 error = newnfs_msleep(td, &np->n_directio_asyncwr,
2793 &np->n_mtx, slpflag | (PRIBIO + 1),
2794 "nfsfsync", 0);
2795 if (error) {
2796 if (newnfs_sigintr(nmp, td)) {
2797 mtx_unlock(&np->n_mtx);
2798 error = EINTR;
2799 goto done;
2800 }
2801 }
2802 }
2803 mtx_unlock(&np->n_mtx);
2804 } else
2805 BO_UNLOCK(bo);
2806 mtx_lock(&np->n_mtx);
2807 if (np->n_flag & NWRITEERR) {
2808 error = np->n_error;
2809 np->n_flag &= ~NWRITEERR;
2810 }
2811 if (commit && bo->bo_dirty.bv_cnt == 0 &&
2812 bo->bo_numoutput == 0 && np->n_directio_asyncwr == 0)
2813 np->n_flag &= ~NMODIFIED;
2814 mtx_unlock(&np->n_mtx);
2815 done:
2816 if (bvec != NULL && bvec != bvec_on_stack)
2817 free(bvec, M_TEMP);
2818 if (error == 0 && commit != 0 && waitfor == MNT_WAIT &&
2819 (bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0 ||
2820 np->n_directio_asyncwr != 0) && trycnt++ < 5) {
2821 /* try, try again... */
2822 passone = 1;
2823 wcred = NULL;
2824 bvec = NULL;
2825 bvecsize = 0;
2826 printf("try%d\n", trycnt);
2827 goto again;
2828 }
2829 return (error);
2830 }
2831
2832 /*
2833 * NFS advisory byte-level locks.
2834 */
2835 static int
2836 nfs_advlock(struct vop_advlock_args *ap)
2837 {
2838 struct vnode *vp = ap->a_vp;
2839 struct ucred *cred;
2840 struct nfsnode *np = VTONFS(ap->a_vp);
2841 struct proc *p = (struct proc *)ap->a_id;
2842 struct thread *td = curthread; /* XXX */
2843 struct vattr va;
2844 int ret, error = EOPNOTSUPP;
2845 u_quad_t size;
2846
2847 if (NFS_ISV4(vp) && (ap->a_flags & F_POSIX)) {
2848 cred = p->p_ucred;
2849 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
2850 if (vp->v_iflag & VI_DOOMED) {
2851 VOP_UNLOCK(vp, 0);
2852 return (EBADF);
2853 }
2854
2855 /*
2856 * If this is unlocking a write locked region, flush and
2857 * commit them before unlocking. This is required by
2858 * RFC3530 Sec. 9.3.2.
2859 */
2860 if (ap->a_op == F_UNLCK &&
2861 nfscl_checkwritelocked(vp, ap->a_fl, cred, td))
2862 (void) ncl_flush(vp, MNT_WAIT, cred, td, 1, 0);
2863
2864 /*
2865 * Loop around doing the lock op, while a blocking lock
2866 * must wait for the lock op to succeed.
2867 */
2868 do {
2869 ret = nfsrpc_advlock(vp, np->n_size, ap->a_op,
2870 ap->a_fl, 0, cred, td);
2871 if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
2872 ap->a_op == F_SETLK) {
2873 VOP_UNLOCK(vp, 0);
2874 error = nfs_catnap(PZERO | PCATCH, ret,
2875 "ncladvl");
2876 if (error)
2877 return (EINTR);
2878 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
2879 if (vp->v_iflag & VI_DOOMED) {
2880 VOP_UNLOCK(vp, 0);
2881 return (EBADF);
2882 }
2883 }
2884 } while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
2885 ap->a_op == F_SETLK);
2886 if (ret == NFSERR_DENIED) {
2887 VOP_UNLOCK(vp, 0);
2888 return (EAGAIN);
2889 } else if (ret == EINVAL || ret == EBADF || ret == EINTR) {
2890 VOP_UNLOCK(vp, 0);
2891 return (ret);
2892 } else if (ret != 0) {
2893 VOP_UNLOCK(vp, 0);
2894 return (EACCES);
2895 }
2896
2897 /*
2898 * Now, if we just got a lock, invalidate data in the buffer
2899 * cache, as required, so that the coherency conforms with
2900 * RFC3530 Sec. 9.3.2.
2901 */
2902 if (ap->a_op == F_SETLK) {
2903 if ((np->n_flag & NMODIFIED) == 0) {
2904 np->n_attrstamp = 0;
2905 ret = VOP_GETATTR(vp, &va, cred);
2906 }
2907 if ((np->n_flag & NMODIFIED) || ret ||
2908 np->n_change != va.va_filerev) {
2909 (void) ncl_vinvalbuf(vp, V_SAVE, td, 1);
2910 np->n_attrstamp = 0;
2911 ret = VOP_GETATTR(vp, &va, cred);
2912 if (!ret) {
2913 np->n_mtime = va.va_mtime;
2914 np->n_change = va.va_filerev;
2915 }
2916 }
2917 }
2918 VOP_UNLOCK(vp, 0);
2919 return (0);
2920 } else if (!NFS_ISV4(vp)) {
2921 error = vn_lock(vp, LK_SHARED);
2922 if (error)
2923 return (error);
2924 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
2925 size = VTONFS(vp)->n_size;
2926 VOP_UNLOCK(vp, 0);
2927 error = lf_advlock(ap, &(vp->v_lockf), size);
2928 } else {
2929 if (ncl_advlock_p)
2930 error = ncl_advlock_p(ap);
2931 else
2932 error = ENOLCK;
2933 }
2934 }
2935 return (error);
2936 }
2937
2938 /*
2939 * NFS advisory byte-level locks.
2940 */
2941 static int
2942 nfs_advlockasync(struct vop_advlockasync_args *ap)
2943 {
2944 struct vnode *vp = ap->a_vp;
2945 u_quad_t size;
2946 int error;
2947
2948 if (NFS_ISV4(vp))
2949 return (EOPNOTSUPP);
2950 error = vn_lock(vp, LK_SHARED);
2951 if (error)
2952 return (error);
2953 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
2954 size = VTONFS(vp)->n_size;
2955 VOP_UNLOCK(vp, 0);
2956 error = lf_advlockasync(ap, &(vp->v_lockf), size);
2957 } else {
2958 VOP_UNLOCK(vp, 0);
2959 error = EOPNOTSUPP;
2960 }
2961 return (error);
2962 }
2963
2964 /*
2965 * Print out the contents of an nfsnode.
2966 */
2967 static int
2968 nfs_print(struct vop_print_args *ap)
2969 {
2970 struct vnode *vp = ap->a_vp;
2971 struct nfsnode *np = VTONFS(vp);
2972
2973 ncl_printf("\tfileid %ld fsid 0x%x",
2974 np->n_vattr.na_fileid, np->n_vattr.na_fsid);
2975 if (vp->v_type == VFIFO)
2976 fifo_printinfo(vp);
2977 printf("\n");
2978 return (0);
2979 }
2980
2981 /*
2982 * This is the "real" nfs::bwrite(struct buf*).
2983 * We set B_CACHE if this is a VMIO buffer.
2984 */
2985 int
2986 ncl_writebp(struct buf *bp, int force __unused, struct thread *td)
2987 {
2988 int s;
2989 int oldflags = bp->b_flags;
2990 #if 0
2991 int retv = 1;
2992 off_t off;
2993 #endif
2994
2995 BUF_ASSERT_HELD(bp);
2996
2997 if (bp->b_flags & B_INVAL) {
2998 brelse(bp);
2999 return(0);
3000 }
3001
3002 bp->b_flags |= B_CACHE;
3003
3004 /*
3005 * Undirty the bp. We will redirty it later if the I/O fails.
3006 */
3007
3008 s = splbio();
3009 bundirty(bp);
3010 bp->b_flags &= ~B_DONE;
3011 bp->b_ioflags &= ~BIO_ERROR;
3012 bp->b_iocmd = BIO_WRITE;
3013
3014 bufobj_wref(bp->b_bufobj);
3015 curthread->td_ru.ru_oublock++;
3016 splx(s);
3017
3018 /*
3019 * Note: to avoid loopback deadlocks, we do not
3020 * assign b_runningbufspace.
3021 */
3022 vfs_busy_pages(bp, 1);
3023
3024 BUF_KERNPROC(bp);
3025 bp->b_iooffset = dbtob(bp->b_blkno);
3026 bstrategy(bp);
3027
3028 if( (oldflags & B_ASYNC) == 0) {
3029 int rtval = bufwait(bp);
3030
3031 if (oldflags & B_DELWRI) {
3032 s = splbio();
3033 reassignbuf(bp);
3034 splx(s);
3035 }
3036 brelse(bp);
3037 return (rtval);
3038 }
3039
3040 return (0);
3041 }
3042
3043 /*
3044 * nfs special file access vnode op.
3045 * Essentially just get vattr and then imitate iaccess() since the device is
3046 * local to the client.
3047 */
3048 static int
3049 nfsspec_access(struct vop_access_args *ap)
3050 {
3051 struct vattr *vap;
3052 struct ucred *cred = ap->a_cred;
3053 struct vnode *vp = ap->a_vp;
3054 accmode_t accmode = ap->a_accmode;
3055 struct vattr vattr;
3056 int error;
3057
3058 /*
3059 * Disallow write attempts on filesystems mounted read-only;
3060 * unless the file is a socket, fifo, or a block or character
3061 * device resident on the filesystem.
3062 */
3063 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3064 switch (vp->v_type) {
3065 case VREG:
3066 case VDIR:
3067 case VLNK:
3068 return (EROFS);
3069 default:
3070 break;
3071 }
3072 }
3073 vap = &vattr;
3074 error = VOP_GETATTR(vp, vap, cred);
3075 if (error)
3076 goto out;
3077 error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid,
3078 accmode, cred, NULL);
3079 out:
3080 return error;
3081 }
3082
3083 /*
3084 * Read wrapper for fifos.
3085 */
3086 static int
3087 nfsfifo_read(struct vop_read_args *ap)
3088 {
3089 struct nfsnode *np = VTONFS(ap->a_vp);
3090 int error;
3091
3092 /*
3093 * Set access flag.
3094 */
3095 mtx_lock(&np->n_mtx);
3096 np->n_flag |= NACC;
3097 getnanotime(&np->n_atim);
3098 mtx_unlock(&np->n_mtx);
3099 error = fifo_specops.vop_read(ap);
3100 return error;
3101 }
3102
3103 /*
3104 * Write wrapper for fifos.
3105 */
3106 static int
3107 nfsfifo_write(struct vop_write_args *ap)
3108 {
3109 struct nfsnode *np = VTONFS(ap->a_vp);
3110
3111 /*
3112 * Set update flag.
3113 */
3114 mtx_lock(&np->n_mtx);
3115 np->n_flag |= NUPD;
3116 getnanotime(&np->n_mtim);
3117 mtx_unlock(&np->n_mtx);
3118 return(fifo_specops.vop_write(ap));
3119 }
3120
3121 /*
3122 * Close wrapper for fifos.
3123 *
3124 * Update the times on the nfsnode then do fifo close.
3125 */
3126 static int
3127 nfsfifo_close(struct vop_close_args *ap)
3128 {
3129 struct vnode *vp = ap->a_vp;
3130 struct nfsnode *np = VTONFS(vp);
3131 struct vattr vattr;
3132 struct timespec ts;
3133
3134 mtx_lock(&np->n_mtx);
3135 if (np->n_flag & (NACC | NUPD)) {
3136 getnanotime(&ts);
3137 if (np->n_flag & NACC)
3138 np->n_atim = ts;
3139 if (np->n_flag & NUPD)
3140 np->n_mtim = ts;
3141 np->n_flag |= NCHG;
3142 if (vrefcnt(vp) == 1 &&
3143 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3144 VATTR_NULL(&vattr);
3145 if (np->n_flag & NACC)
3146 vattr.va_atime = np->n_atim;
3147 if (np->n_flag & NUPD)
3148 vattr.va_mtime = np->n_mtim;
3149 mtx_unlock(&np->n_mtx);
3150 (void)VOP_SETATTR(vp, &vattr, ap->a_cred);
3151 goto out;
3152 }
3153 }
3154 mtx_unlock(&np->n_mtx);
3155 out:
3156 return (fifo_specops.vop_close(ap));
3157 }
3158
3159 /*
3160 * Just call ncl_writebp() with the force argument set to 1.
3161 *
3162 * NOTE: B_DONE may or may not be set in a_bp on call.
3163 */
3164 static int
3165 nfs_bwrite(struct buf *bp)
3166 {
3167
3168 return (ncl_writebp(bp, 1, curthread));
3169 }
3170
3171 struct buf_ops buf_ops_newnfs = {
3172 .bop_name = "buf_ops_nfs",
3173 .bop_write = nfs_bwrite,
3174 .bop_strategy = bufstrategy,
3175 .bop_sync = bufsync,
3176 .bop_bdflush = bufbdflush,
3177 };
3178
3179 /*
3180 * Cloned from vop_stdlock(), and then the ugly hack added.
3181 */
3182 static int
3183 nfs_lock1(struct vop_lock1_args *ap)
3184 {
3185 struct vnode *vp = ap->a_vp;
3186 int error = 0;
3187
3188 /*
3189 * Since vfs_hash_get() calls vget() and it will no longer work
3190 * for FreeBSD8 with flags == 0, I can only think of this horrible
3191 * hack to work around it. I call vfs_hash_get() with LK_EXCLOTHER
3192 * and then handle it here. All I want for this case is a v_usecount
3193 * on the vnode to use for recovery, while another thread might
3194 * hold a lock on the vnode. I have the other threads blocked, so
3195 * there isn't any race problem.
3196 */
3197 if ((ap->a_flags & LK_TYPE_MASK) == LK_EXCLOTHER) {
3198 if ((ap->a_flags & LK_INTERLOCK) == 0)
3199 panic("ncllock1");
3200 if ((vp->v_iflag & VI_DOOMED))
3201 error = ENOENT;
3202 VI_UNLOCK(vp);
3203 return (error);
3204 }
3205 return (_lockmgr_args(vp->v_vnlock, ap->a_flags, VI_MTX(vp),
3206 LK_WMESG_DEFAULT, LK_PRIO_DEFAULT, LK_TIMO_DEFAULT, ap->a_file,
3207 ap->a_line));
3208 }
3209
3210 #ifdef NFS4_ACL_EXTATTR_NAME
3211 static int
3212 nfs_getacl(struct vop_getacl_args *ap)
3213 {
3214 int error;
3215
3216 if (ap->a_type != ACL_TYPE_NFS4)
3217 return (EOPNOTSUPP);
3218 error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3219 NULL);
3220 if (error > NFSERR_STALE) {
3221 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3222 error = EPERM;
3223 }
3224 return (error);
3225 }
3226
3227 static int
3228 nfs_setacl(struct vop_setacl_args *ap)
3229 {
3230 int error;
3231
3232 if (ap->a_type != ACL_TYPE_NFS4)
3233 return (EOPNOTSUPP);
3234 error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3235 NULL);
3236 if (error > NFSERR_STALE) {
3237 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3238 error = EPERM;
3239 }
3240 return (error);
3241 }
3242
3243 #endif /* NFS4_ACL_EXTATTR_NAME */
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