2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * Rick Macklem at The University of Guelph.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * from nfs_vnops.c 8.16 (Berkeley) 5/27/95
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
41 * vnode op calls for Sun NFS version 2, 3 and 4
46 #include <sys/param.h>
47 #include <sys/kernel.h>
48 #include <sys/systm.h>
49 #include <sys/resourcevar.h>
51 #include <sys/mount.h>
54 #include <sys/extattr.h>
55 #include <sys/filio.h>
57 #include <sys/malloc.h>
59 #include <sys/namei.h>
60 #include <sys/socket.h>
61 #include <sys/vnode.h>
62 #include <sys/dirent.h>
63 #include <sys/fcntl.h>
64 #include <sys/lockf.h>
66 #include <sys/sysctl.h>
67 #include <sys/signalvar.h>
70 #include <vm/vm_extern.h>
71 #include <vm/vm_object.h>
73 #include <fs/nfs/nfsport.h>
74 #include <fs/nfsclient/nfsnode.h>
75 #include <fs/nfsclient/nfsmount.h>
76 #include <fs/nfsclient/nfs.h>
77 #include <fs/nfsclient/nfs_kdtrace.h>
80 #include <netinet/in.h>
81 #include <netinet/in_var.h>
83 #include <nfs/nfs_lock.h>
86 #include <sys/dtrace_bsd.h>
88 dtrace_nfsclient_accesscache_flush_probe_func_t
89 dtrace_nfscl_accesscache_flush_done_probe;
90 uint32_t nfscl_accesscache_flush_done_id;
92 dtrace_nfsclient_accesscache_get_probe_func_t
93 dtrace_nfscl_accesscache_get_hit_probe,
94 dtrace_nfscl_accesscache_get_miss_probe;
95 uint32_t nfscl_accesscache_get_hit_id;
96 uint32_t nfscl_accesscache_get_miss_id;
98 dtrace_nfsclient_accesscache_load_probe_func_t
99 dtrace_nfscl_accesscache_load_done_probe;
100 uint32_t nfscl_accesscache_load_done_id;
101 #endif /* !KDTRACE_HOOKS */
107 extern struct nfsstatsv1 nfsstatsv1;
108 extern int nfsrv_useacl;
109 extern int nfscl_debuglevel;
110 MALLOC_DECLARE(M_NEWNFSREQ);
112 static vop_read_t nfsfifo_read;
113 static vop_write_t nfsfifo_write;
114 static vop_close_t nfsfifo_close;
115 static int nfs_setattrrpc(struct vnode *, struct vattr *, struct ucred *,
117 static vop_lookup_t nfs_lookup;
118 static vop_create_t nfs_create;
119 static vop_mknod_t nfs_mknod;
120 static vop_open_t nfs_open;
121 static vop_pathconf_t nfs_pathconf;
122 static vop_close_t nfs_close;
123 static vop_access_t nfs_access;
124 static vop_getattr_t nfs_getattr;
125 static vop_setattr_t nfs_setattr;
126 static vop_read_t nfs_read;
127 static vop_fsync_t nfs_fsync;
128 static vop_remove_t nfs_remove;
129 static vop_link_t nfs_link;
130 static vop_rename_t nfs_rename;
131 static vop_mkdir_t nfs_mkdir;
132 static vop_rmdir_t nfs_rmdir;
133 static vop_symlink_t nfs_symlink;
134 static vop_readdir_t nfs_readdir;
135 static vop_strategy_t nfs_strategy;
136 static int nfs_lookitup(struct vnode *, char *, int,
137 struct ucred *, struct thread *, struct nfsnode **);
138 static int nfs_sillyrename(struct vnode *, struct vnode *,
139 struct componentname *);
140 static vop_access_t nfsspec_access;
141 static vop_readlink_t nfs_readlink;
142 static vop_print_t nfs_print;
143 static vop_advlock_t nfs_advlock;
144 static vop_advlockasync_t nfs_advlockasync;
145 static vop_getacl_t nfs_getacl;
146 static vop_setacl_t nfs_setacl;
147 static vop_advise_t nfs_advise;
148 static vop_allocate_t nfs_allocate;
149 static vop_deallocate_t nfs_deallocate;
150 static vop_copy_file_range_t nfs_copy_file_range;
151 static vop_ioctl_t nfs_ioctl;
152 static vop_getextattr_t nfs_getextattr;
153 static vop_setextattr_t nfs_setextattr;
154 static vop_listextattr_t nfs_listextattr;
155 static vop_deleteextattr_t nfs_deleteextattr;
156 static vop_lock1_t nfs_lock;
159 * Global vfs data structures for nfs
162 static struct vop_vector newnfs_vnodeops_nosig = {
163 .vop_default = &default_vnodeops,
164 .vop_access = nfs_access,
165 .vop_advlock = nfs_advlock,
166 .vop_advlockasync = nfs_advlockasync,
167 .vop_close = nfs_close,
168 .vop_create = nfs_create,
169 .vop_fsync = nfs_fsync,
170 .vop_getattr = nfs_getattr,
171 .vop_getpages = ncl_getpages,
172 .vop_putpages = ncl_putpages,
173 .vop_inactive = ncl_inactive,
174 .vop_link = nfs_link,
175 .vop_lock1 = nfs_lock,
176 .vop_lookup = nfs_lookup,
177 .vop_mkdir = nfs_mkdir,
178 .vop_mknod = nfs_mknod,
179 .vop_open = nfs_open,
180 .vop_pathconf = nfs_pathconf,
181 .vop_print = nfs_print,
182 .vop_read = nfs_read,
183 .vop_readdir = nfs_readdir,
184 .vop_readlink = nfs_readlink,
185 .vop_reclaim = ncl_reclaim,
186 .vop_remove = nfs_remove,
187 .vop_rename = nfs_rename,
188 .vop_rmdir = nfs_rmdir,
189 .vop_setattr = nfs_setattr,
190 .vop_strategy = nfs_strategy,
191 .vop_symlink = nfs_symlink,
192 .vop_write = ncl_write,
193 .vop_getacl = nfs_getacl,
194 .vop_setacl = nfs_setacl,
195 .vop_advise = nfs_advise,
196 .vop_allocate = nfs_allocate,
197 .vop_deallocate = nfs_deallocate,
198 .vop_copy_file_range = nfs_copy_file_range,
199 .vop_ioctl = nfs_ioctl,
200 .vop_getextattr = nfs_getextattr,
201 .vop_setextattr = nfs_setextattr,
202 .vop_listextattr = nfs_listextattr,
203 .vop_deleteextattr = nfs_deleteextattr,
205 VFS_VOP_VECTOR_REGISTER(newnfs_vnodeops_nosig);
208 nfs_vnodeops_bypass(struct vop_generic_args *a)
211 return (vop_sigdefer(&newnfs_vnodeops_nosig, a));
214 struct vop_vector newnfs_vnodeops = {
215 .vop_default = &default_vnodeops,
216 .vop_bypass = nfs_vnodeops_bypass,
218 VFS_VOP_VECTOR_REGISTER(newnfs_vnodeops);
220 static struct vop_vector newnfs_fifoops_nosig = {
221 .vop_default = &fifo_specops,
222 .vop_access = nfsspec_access,
223 .vop_close = nfsfifo_close,
224 .vop_fsync = nfs_fsync,
225 .vop_getattr = nfs_getattr,
226 .vop_inactive = ncl_inactive,
227 .vop_pathconf = nfs_pathconf,
228 .vop_print = nfs_print,
229 .vop_read = nfsfifo_read,
230 .vop_reclaim = ncl_reclaim,
231 .vop_setattr = nfs_setattr,
232 .vop_write = nfsfifo_write,
234 VFS_VOP_VECTOR_REGISTER(newnfs_fifoops_nosig);
237 nfs_fifoops_bypass(struct vop_generic_args *a)
240 return (vop_sigdefer(&newnfs_fifoops_nosig, a));
243 struct vop_vector newnfs_fifoops = {
244 .vop_default = &default_vnodeops,
245 .vop_bypass = nfs_fifoops_bypass,
247 VFS_VOP_VECTOR_REGISTER(newnfs_fifoops);
249 static int nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp,
250 struct componentname *cnp, struct vattr *vap);
251 static int nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
252 int namelen, struct ucred *cred, struct thread *td);
253 static int nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp,
254 char *fnameptr, int fnamelen, struct vnode *tdvp, struct vnode *tvp,
255 char *tnameptr, int tnamelen, struct ucred *cred, struct thread *td);
256 static int nfs_renameit(struct vnode *sdvp, struct vnode *svp,
257 struct componentname *scnp, struct sillyrename *sp);
262 SYSCTL_DECL(_vfs_nfs);
264 static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
265 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
266 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
268 static int nfs_prime_access_cache = 0;
269 SYSCTL_INT(_vfs_nfs, OID_AUTO, prime_access_cache, CTLFLAG_RW,
270 &nfs_prime_access_cache, 0,
271 "Prime NFS ACCESS cache when fetching attributes");
273 static int newnfs_commit_on_close = 0;
274 SYSCTL_INT(_vfs_nfs, OID_AUTO, commit_on_close, CTLFLAG_RW,
275 &newnfs_commit_on_close, 0, "write+commit on close, else only write");
277 static int nfs_clean_pages_on_close = 1;
278 SYSCTL_INT(_vfs_nfs, OID_AUTO, clean_pages_on_close, CTLFLAG_RW,
279 &nfs_clean_pages_on_close, 0, "NFS clean dirty pages on close");
281 int newnfs_directio_enable = 0;
282 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_enable, CTLFLAG_RW,
283 &newnfs_directio_enable, 0, "Enable NFS directio");
285 int nfs_keep_dirty_on_error;
286 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_keep_dirty_on_error, CTLFLAG_RW,
287 &nfs_keep_dirty_on_error, 0, "Retry pageout if error returned");
290 * This sysctl allows other processes to mmap a file that has been opened
291 * O_DIRECT by a process. In general, having processes mmap the file while
292 * Direct IO is in progress can lead to Data Inconsistencies. But, we allow
293 * this by default to prevent DoS attacks - to prevent a malicious user from
294 * opening up files O_DIRECT preventing other users from mmap'ing these
295 * files. "Protected" environments where stricter consistency guarantees are
296 * required can disable this knob. The process that opened the file O_DIRECT
297 * cannot mmap() the file, because mmap'ed IO on an O_DIRECT open() is not
300 int newnfs_directio_allow_mmap = 1;
301 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_allow_mmap, CTLFLAG_RW,
302 &newnfs_directio_allow_mmap, 0, "Enable mmaped IO on file with O_DIRECT opens");
304 #define NFSACCESS_ALL (NFSACCESS_READ | NFSACCESS_MODIFY \
305 | NFSACCESS_EXTEND | NFSACCESS_EXECUTE \
306 | NFSACCESS_DELETE | NFSACCESS_LOOKUP)
310 * The list of locks after the description of the lock is the ordering
311 * of other locks acquired with the lock held.
312 * np->n_mtx : Protects the fields in the nfsnode.
314 VI_MTX (acquired indirectly)
315 * nmp->nm_mtx : Protects the fields in the nfsmount.
317 * ncl_iod_mutex : Global lock, protects shared nfsiod state.
318 * nfs_reqq_mtx : Global lock, protects the nfs_reqq list.
321 * rep->r_mtx : Protects the fields in an nfsreq.
325 nfs_lock(struct vop_lock1_args *ap)
334 lktype = ap->a_flags & LK_TYPE_MASK;
335 error = VOP_LOCK1_APV(&default_vnodeops, ap);
336 if (error != 0 || vp->v_op != &newnfs_vnodeops)
342 if ((np->n_flag & NVNSETSZSKIP) == 0 || (lktype != LK_SHARED &&
343 lktype != LK_EXCLUSIVE && lktype != LK_UPGRADE &&
344 lktype != LK_TRYUPGRADE)) {
348 onfault = (ap->a_flags & LK_EATTR_MASK) == LK_NOWAIT &&
349 (ap->a_flags & LK_INIT_MASK) == LK_CANRECURSE &&
350 (lktype == LK_SHARED || lktype == LK_EXCLUSIVE);
351 if (onfault && vp->v_vnlock->lk_recurse == 0) {
353 * Force retry in vm_fault(), to make the lock request
354 * sleepable, which allows us to piggy-back the
355 * sleepable call to vnode_pager_setsize().
361 if ((ap->a_flags & LK_NOWAIT) != 0 ||
362 (lktype == LK_SHARED && vp->v_vnlock->lk_recurse > 0)) {
366 if (lktype == LK_SHARED) {
369 ap->a_flags &= ~(LK_TYPE_MASK | LK_INTERLOCK);
370 ap->a_flags |= LK_EXCLUSIVE;
371 error = VOP_LOCK1_APV(&default_vnodeops, ap);
372 if (error != 0 || vp->v_op != &newnfs_vnodeops)
374 if (vp->v_data == NULL)
376 MPASS(vp->v_data == np);
378 if ((np->n_flag & NVNSETSZSKIP) == 0) {
383 np->n_flag &= ~NVNSETSZSKIP;
386 vnode_pager_setsize(vp, nsize);
388 if (lktype == LK_SHARED) {
389 ap->a_flags &= ~(LK_TYPE_MASK | LK_INTERLOCK);
390 ap->a_flags |= LK_DOWNGRADE;
391 (void)VOP_LOCK1_APV(&default_vnodeops, ap);
397 nfs34_access_otw(struct vnode *vp, int wmode, struct thread *td,
398 struct ucred *cred, u_int32_t *retmode)
400 int error = 0, attrflag, i, lrupos;
402 struct nfsnode *np = VTONFS(vp);
403 struct nfsvattr nfsva;
405 error = nfsrpc_accessrpc(vp, wmode, cred, td, &nfsva, &attrflag,
408 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
412 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
413 if (np->n_accesscache[i].uid == cred->cr_uid) {
414 np->n_accesscache[i].mode = rmode;
415 np->n_accesscache[i].stamp = time_second;
418 if (i > 0 && np->n_accesscache[i].stamp <
419 np->n_accesscache[lrupos].stamp)
422 if (i == NFS_ACCESSCACHESIZE) {
423 np->n_accesscache[lrupos].uid = cred->cr_uid;
424 np->n_accesscache[lrupos].mode = rmode;
425 np->n_accesscache[lrupos].stamp = time_second;
430 KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, rmode, 0);
431 } else if (NFS_ISV4(vp)) {
432 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
436 KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, 0,
443 * nfs access vnode op.
444 * For nfs version 2, just return ok. File accesses may fail later.
445 * For nfs version 3, use the access rpc to check accessibility. If file modes
446 * are changed on the server, accesses might still fail later.
449 nfs_access(struct vop_access_args *ap)
451 struct vnode *vp = ap->a_vp;
452 int error = 0, i, gotahit;
453 u_int32_t mode, wmode, rmode;
454 int v34 = NFS_ISV34(vp);
455 struct nfsnode *np = VTONFS(vp);
458 * Disallow write attempts on filesystems mounted read-only;
459 * unless the file is a socket, fifo, or a block or character
460 * device resident on the filesystem.
462 if ((ap->a_accmode & (VWRITE | VAPPEND | VWRITE_NAMED_ATTRS |
463 VDELETE_CHILD | VWRITE_ATTRIBUTES | VDELETE | VWRITE_ACL |
464 VWRITE_OWNER)) != 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0) {
465 switch (vp->v_type) {
475 * For nfs v3 or v4, check to see if we have done this recently, and if
476 * so return our cached result instead of making an ACCESS call.
477 * If not, do an access rpc, otherwise you are stuck emulating
478 * ufs_access() locally using the vattr. This may not be correct,
479 * since the server may apply other access criteria such as
480 * client uid-->server uid mapping that we do not know about.
483 if (ap->a_accmode & VREAD)
484 mode = NFSACCESS_READ;
487 if (vp->v_type != VDIR) {
488 if (ap->a_accmode & VWRITE)
489 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
490 if (ap->a_accmode & VAPPEND)
491 mode |= NFSACCESS_EXTEND;
492 if (ap->a_accmode & VEXEC)
493 mode |= NFSACCESS_EXECUTE;
494 if (ap->a_accmode & VDELETE)
495 mode |= NFSACCESS_DELETE;
497 if (ap->a_accmode & VWRITE)
498 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
499 if (ap->a_accmode & VAPPEND)
500 mode |= NFSACCESS_EXTEND;
501 if (ap->a_accmode & VEXEC)
502 mode |= NFSACCESS_LOOKUP;
503 if (ap->a_accmode & VDELETE)
504 mode |= NFSACCESS_DELETE;
505 if (ap->a_accmode & VDELETE_CHILD)
506 mode |= NFSACCESS_MODIFY;
508 /* XXX safety belt, only make blanket request if caching */
509 if (nfsaccess_cache_timeout > 0) {
510 wmode = NFSACCESS_READ | NFSACCESS_MODIFY |
511 NFSACCESS_EXTEND | NFSACCESS_EXECUTE |
512 NFSACCESS_DELETE | NFSACCESS_LOOKUP;
518 * Does our cached result allow us to give a definite yes to
523 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
524 if (ap->a_cred->cr_uid == np->n_accesscache[i].uid) {
525 if (time_second < (np->n_accesscache[i].stamp
526 + nfsaccess_cache_timeout) &&
527 (np->n_accesscache[i].mode & mode) == mode) {
528 NFSINCRGLOBAL(nfsstatsv1.accesscache_hits);
537 KDTRACE_NFS_ACCESSCACHE_GET_HIT(vp,
538 ap->a_cred->cr_uid, mode);
540 KDTRACE_NFS_ACCESSCACHE_GET_MISS(vp,
541 ap->a_cred->cr_uid, mode);
545 * Either a no, or a don't know. Go to the wire.
547 NFSINCRGLOBAL(nfsstatsv1.accesscache_misses);
548 error = nfs34_access_otw(vp, wmode, ap->a_td,
551 (rmode & mode) != mode)
556 if ((error = nfsspec_access(ap)) != 0) {
560 * Attempt to prevent a mapped root from accessing a file
561 * which it shouldn't. We try to read a byte from the file
562 * if the user is root and the file is not zero length.
563 * After calling nfsspec_access, we should have the correct
567 if (ap->a_cred->cr_uid == 0 && (ap->a_accmode & VREAD)
568 && VTONFS(vp)->n_size > 0) {
576 auio.uio_iov = &aiov;
580 auio.uio_segflg = UIO_SYSSPACE;
581 auio.uio_rw = UIO_READ;
582 auio.uio_td = ap->a_td;
584 if (vp->v_type == VREG)
585 error = ncl_readrpc(vp, &auio, ap->a_cred);
586 else if (vp->v_type == VDIR) {
588 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
590 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
591 error = ncl_readdirrpc(vp, &auio, ap->a_cred,
594 } else if (vp->v_type == VLNK)
595 error = ncl_readlinkrpc(vp, &auio, ap->a_cred);
606 * Check to see if the type is ok
607 * and that deletion is not in progress.
608 * For paged in text files, you will need to flush the page cache
609 * if consistency is lost.
613 nfs_open(struct vop_open_args *ap)
615 struct vnode *vp = ap->a_vp;
616 struct nfsnode *np = VTONFS(vp);
619 int fmode = ap->a_mode;
623 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK)
627 * For NFSv4, we need to do the Open Op before cache validation,
628 * so that we conform to RFC3530 Sec. 9.3.1.
631 error = nfsrpc_open(vp, fmode, ap->a_cred, ap->a_td);
633 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
640 * Now, if this Open will be doing reading, re-validate/flush the
641 * cache, so that Close/Open coherency is maintained.
644 if (np->n_flag & NMODIFIED) {
646 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
647 if (error == EINTR || error == EIO) {
649 (void) nfsrpc_close(vp, 0, ap->a_td);
654 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
655 if (vp->v_type == VDIR)
656 np->n_direofoffset = 0;
658 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
661 (void) nfsrpc_close(vp, 0, ap->a_td);
665 np->n_mtime = vattr.va_mtime;
667 np->n_change = vattr.va_filerev;
670 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
673 (void) nfsrpc_close(vp, 0, ap->a_td);
677 if ((NFS_ISV4(vp) && np->n_change != vattr.va_filerev) ||
678 NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
679 if (vp->v_type == VDIR)
680 np->n_direofoffset = 0;
682 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
683 if (error == EINTR || error == EIO) {
685 (void) nfsrpc_close(vp, 0, ap->a_td);
689 np->n_mtime = vattr.va_mtime;
691 np->n_change = vattr.va_filerev;
696 * If the object has >= 1 O_DIRECT active opens, we disable caching.
698 if (newnfs_directio_enable && (fmode & O_DIRECT) &&
699 (vp->v_type == VREG)) {
700 if (np->n_directio_opens == 0) {
702 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
705 (void) nfsrpc_close(vp, 0, ap->a_td);
709 np->n_flag |= NNONCACHE;
711 np->n_directio_opens++;
714 /* If opened for writing via NFSv4.1 or later, mark that for pNFS. */
715 if (NFSHASPNFS(VFSTONFS(vp->v_mount)) && (fmode & FWRITE) != 0)
716 np->n_flag |= NWRITEOPENED;
719 * If this is an open for writing, capture a reference to the
720 * credentials, so they can be used by ncl_putpages(). Using
721 * these write credentials is preferable to the credentials of
722 * whatever thread happens to be doing the VOP_PUTPAGES() since
723 * the write RPCs are less likely to fail with EACCES.
725 if ((fmode & FWRITE) != 0) {
726 cred = np->n_writecred;
727 np->n_writecred = crhold(ap->a_cred);
734 vnode_create_vobject(vp, vattr.va_size, ap->a_td);
737 * If the text file has been mmap'd, flush any dirty pages to the
738 * buffer cache and then...
739 * Make sure all writes are pushed to the NFS server. If this is not
740 * done, the modify time of the file can change while the text
741 * file is being executed. This will cause the process that is
742 * executing the text file to be terminated.
744 if (vp->v_writecount <= -1) {
745 if ((obj = vp->v_object) != NULL &&
746 vm_object_mightbedirty(obj)) {
747 VM_OBJECT_WLOCK(obj);
748 vm_object_page_clean(obj, 0, 0, OBJPC_SYNC);
749 VM_OBJECT_WUNLOCK(obj);
752 /* Now, flush the buffer cache. */
753 ncl_flush(vp, MNT_WAIT, curthread, 0, 0);
755 /* And, finally, make sure that n_mtime is up to date. */
758 np->n_mtime = np->n_vattr.na_mtime;
766 * What an NFS client should do upon close after writing is a debatable issue.
767 * Most NFS clients push delayed writes to the server upon close, basically for
769 * 1 - So that any write errors may be reported back to the client process
770 * doing the close system call. By far the two most likely errors are
771 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
772 * 2 - To put a worst case upper bound on cache inconsistency between
773 * multiple clients for the file.
774 * There is also a consistency problem for Version 2 of the protocol w.r.t.
775 * not being able to tell if other clients are writing a file concurrently,
776 * since there is no way of knowing if the changed modify time in the reply
777 * is only due to the write for this client.
778 * (NFS Version 3 provides weak cache consistency data in the reply that
779 * should be sufficient to detect and handle this case.)
781 * The current code does the following:
782 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
783 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
784 * or commit them (this satisfies 1 and 2 except for the
785 * case where the server crashes after this close but
786 * before the commit RPC, which is felt to be "good
787 * enough". Changing the last argument to ncl_flush() to
788 * a 1 would force a commit operation, if it is felt a
789 * commit is necessary now.
790 * for NFS Version 4 - flush the dirty buffers and commit them, if
791 * nfscl_mustflush() says this is necessary.
792 * It is necessary if there is no write delegation held,
793 * in order to satisfy open/close coherency.
794 * If the file isn't cached on local stable storage,
795 * it may be necessary in order to detect "out of space"
796 * errors from the server, if the write delegation
797 * issued by the server doesn't allow the file to grow.
801 nfs_close(struct vop_close_args *ap)
803 struct vnode *vp = ap->a_vp;
804 struct nfsnode *np = VTONFS(vp);
805 struct nfsvattr nfsva;
807 int error = 0, ret, localcred = 0;
808 int fmode = ap->a_fflag;
810 if (NFSCL_FORCEDISM(vp->v_mount))
813 * During shutdown, a_cred isn't valid, so just use root.
815 if (ap->a_cred == NOCRED) {
816 cred = newnfs_getcred();
821 if (vp->v_type == VREG) {
823 * Examine and clean dirty pages, regardless of NMODIFIED.
824 * This closes a major hole in close-to-open consistency.
825 * We want to push out all dirty pages (and buffers) on
826 * close, regardless of whether they were dirtied by
827 * mmap'ed writes or via write().
829 if (nfs_clean_pages_on_close && vp->v_object) {
830 VM_OBJECT_WLOCK(vp->v_object);
831 vm_object_page_clean(vp->v_object, 0, 0, 0);
832 VM_OBJECT_WUNLOCK(vp->v_object);
835 if (np->n_flag & NMODIFIED) {
839 * Under NFSv3 we have dirty buffers to dispose of. We
840 * must flush them to the NFS server. We have the option
841 * of waiting all the way through the commit rpc or just
842 * waiting for the initial write. The default is to only
843 * wait through the initial write so the data is in the
844 * server's cache, which is roughly similar to the state
845 * a standard disk subsystem leaves the file in on close().
847 * We cannot clear the NMODIFIED bit in np->n_flag due to
848 * potential races with other processes, and certainly
849 * cannot clear it if we don't commit.
850 * These races occur when there is no longer the old
851 * traditional vnode locking implemented for Vnode Ops.
853 int cm = newnfs_commit_on_close ? 1 : 0;
854 error = ncl_flush(vp, MNT_WAIT, ap->a_td, cm, 0);
855 /* np->n_flag &= ~NMODIFIED; */
856 } else if (NFS_ISV4(vp)) {
857 if (nfscl_mustflush(vp) != 0) {
858 int cm = newnfs_commit_on_close ? 1 : 0;
859 error = ncl_flush(vp, MNT_WAIT, ap->a_td,
862 * as above w.r.t races when clearing
864 * np->n_flag &= ~NMODIFIED;
868 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
873 * Invalidate the attribute cache in all cases.
874 * An open is going to fetch fresh attrs any way, other procs
875 * on this node that have file open will be forced to do an
876 * otw attr fetch, but this is safe.
877 * --> A user found that their RPC count dropped by 20% when
878 * this was commented out and I can't see any requirement
879 * for it, so I've disabled it when negative lookups are
880 * enabled. (What does this have to do with negative lookup
881 * caching? Well nothing, except it was reported by the
882 * same user that needed negative lookup caching and I wanted
883 * there to be a way to disable it to see if it
884 * is the cause of some caching/coherency issue that might
887 if (VFSTONFS(vp->v_mount)->nm_negnametimeo == 0) {
889 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
891 if (np->n_flag & NWRITEERR) {
892 np->n_flag &= ~NWRITEERR;
900 * Get attributes so "change" is up to date.
902 if (error == 0 && nfscl_mustflush(vp) != 0 &&
903 vp->v_type == VREG &&
904 (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOCTO) == 0) {
905 ret = nfsrpc_getattr(vp, cred, ap->a_td, &nfsva,
908 np->n_change = nfsva.na_filerev;
909 (void) nfscl_loadattrcache(&vp, &nfsva, NULL,
917 ret = nfsrpc_close(vp, 0, ap->a_td);
921 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
924 if (newnfs_directio_enable)
925 KASSERT((np->n_directio_asyncwr == 0),
926 ("nfs_close: dirty unflushed (%d) directio buffers\n",
927 np->n_directio_asyncwr));
928 if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) {
930 KASSERT((np->n_directio_opens > 0),
931 ("nfs_close: unexpectedly value (0) of n_directio_opens\n"));
932 np->n_directio_opens--;
933 if (np->n_directio_opens == 0)
934 np->n_flag &= ~NNONCACHE;
943 * nfs getattr call from vfs.
946 nfs_getattr(struct vop_getattr_args *ap)
948 struct vnode *vp = ap->a_vp;
949 struct thread *td = curthread; /* XXX */
950 struct nfsnode *np = VTONFS(vp);
952 struct nfsvattr nfsva;
953 struct vattr *vap = ap->a_vap;
957 * Update local times for special files.
960 if (np->n_flag & (NACC | NUPD))
964 * First look in the cache.
966 if (ncl_getattrcache(vp, &vattr) == 0) {
967 ncl_copy_vattr(vap, &vattr);
970 * Get the local modify time for the case of a write
973 nfscl_deleggetmodtime(vp, &vap->va_mtime);
977 if (NFS_ISV34(vp) && nfs_prime_access_cache &&
978 nfsaccess_cache_timeout > 0) {
979 NFSINCRGLOBAL(nfsstatsv1.accesscache_misses);
980 nfs34_access_otw(vp, NFSACCESS_ALL, td, ap->a_cred, NULL);
981 if (ncl_getattrcache(vp, ap->a_vap) == 0) {
982 nfscl_deleggetmodtime(vp, &ap->a_vap->va_mtime);
986 error = nfsrpc_getattr(vp, ap->a_cred, td, &nfsva, NULL);
988 error = nfscl_loadattrcache(&vp, &nfsva, vap, NULL, 0, 0);
991 * Get the local modify time for the case of a write
994 nfscl_deleggetmodtime(vp, &vap->va_mtime);
995 } else if (NFS_ISV4(vp)) {
996 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1005 nfs_setattr(struct vop_setattr_args *ap)
1007 struct vnode *vp = ap->a_vp;
1008 struct nfsnode *np = VTONFS(vp);
1009 struct thread *td = curthread; /* XXX */
1010 struct vattr *vap = ap->a_vap;
1015 tsize = (u_quad_t)0;
1019 * Setting of flags and marking of atimes are not supported.
1021 if (vap->va_flags != VNOVAL)
1022 return (EOPNOTSUPP);
1025 * Disallow write attempts if the filesystem is mounted read-only.
1027 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
1028 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
1029 vap->va_mtime.tv_sec != VNOVAL ||
1030 vap->va_birthtime.tv_sec != VNOVAL ||
1031 vap->va_mode != (mode_t)VNOVAL) &&
1032 (vp->v_mount->mnt_flag & MNT_RDONLY))
1034 if (vap->va_size != VNOVAL) {
1035 switch (vp->v_type) {
1042 if (vap->va_mtime.tv_sec == VNOVAL &&
1043 vap->va_atime.tv_sec == VNOVAL &&
1044 vap->va_birthtime.tv_sec == VNOVAL &&
1045 vap->va_mode == (mode_t)VNOVAL &&
1046 vap->va_uid == (uid_t)VNOVAL &&
1047 vap->va_gid == (gid_t)VNOVAL)
1049 vap->va_size = VNOVAL;
1053 * Disallow write attempts if the filesystem is
1054 * mounted read-only.
1056 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1059 * We run vnode_pager_setsize() early (why?),
1060 * we must set np->n_size now to avoid vinvalbuf
1061 * V_SAVE races that might setsize a lower
1067 error = ncl_meta_setsize(vp, td, vap->va_size);
1069 if (np->n_flag & NMODIFIED) {
1072 error = ncl_vinvalbuf(vp, vap->va_size == 0 ?
1075 vnode_pager_setsize(vp, tsize);
1079 * Call nfscl_delegmodtime() to set the modify time
1080 * locally, as required.
1082 nfscl_delegmodtime(vp);
1086 * np->n_size has already been set to vap->va_size
1087 * in ncl_meta_setsize(). We must set it again since
1088 * nfs_loadattrcache() could be called through
1089 * ncl_meta_setsize() and could modify np->n_size.
1092 np->n_vattr.na_size = np->n_size = vap->va_size;
1097 if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) &&
1098 (np->n_flag & NMODIFIED) && vp->v_type == VREG) {
1100 error = ncl_vinvalbuf(vp, V_SAVE, td, 1);
1101 if (error == EINTR || error == EIO)
1106 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
1107 if (error && vap->va_size != VNOVAL) {
1109 np->n_size = np->n_vattr.na_size = tsize;
1110 vnode_pager_setsize(vp, tsize);
1117 * Do an nfs setattr rpc.
1120 nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred,
1123 struct nfsnode *np = VTONFS(vp);
1124 int error, ret, attrflag, i;
1125 struct nfsvattr nfsva;
1127 if (NFS_ISV34(vp)) {
1129 for (i = 0; i < NFS_ACCESSCACHESIZE; i++)
1130 np->n_accesscache[i].stamp = 0;
1131 np->n_flag |= NDELEGMOD;
1133 KDTRACE_NFS_ACCESSCACHE_FLUSH_DONE(vp);
1135 error = nfsrpc_setattr(vp, vap, NULL, cred, td, &nfsva, &attrflag,
1138 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1142 if (error && NFS_ISV4(vp))
1143 error = nfscl_maperr(td, error, vap->va_uid, vap->va_gid);
1148 * nfs lookup call, one step at a time...
1149 * First look in cache
1150 * If not found, unlock the directory nfsnode and do the rpc
1153 nfs_lookup(struct vop_lookup_args *ap)
1155 struct componentname *cnp = ap->a_cnp;
1156 struct vnode *dvp = ap->a_dvp;
1157 struct vnode **vpp = ap->a_vpp;
1158 struct mount *mp = dvp->v_mount;
1159 int flags = cnp->cn_flags;
1160 struct vnode *newvp;
1161 struct nfsmount *nmp;
1162 struct nfsnode *np, *newnp;
1163 int error = 0, attrflag, dattrflag, ltype, ncticks;
1164 struct thread *td = cnp->cn_thread;
1166 struct nfsvattr dnfsva, nfsva;
1168 struct timespec nctime;
1172 if ((flags & ISLASTCN) && (mp->mnt_flag & MNT_RDONLY) &&
1173 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
1175 if (dvp->v_type != VDIR)
1180 /* For NFSv4, wait until any remove is done. */
1182 while (NFSHASNFSV4(nmp) && (np->n_flag & NREMOVEINPROG)) {
1183 np->n_flag |= NREMOVEWANT;
1184 (void) msleep((caddr_t)np, &np->n_mtx, PZERO, "nfslkup", 0);
1188 error = vn_dir_check_exec(dvp, cnp);
1191 error = cache_lookup(dvp, vpp, cnp, &nctime, &ncticks);
1192 if (error > 0 && error != ENOENT)
1196 * Lookups of "." are special and always return the
1197 * current directory. cache_lookup() already handles
1198 * associated locking bookkeeping, etc.
1200 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
1201 /* XXX: Is this really correct? */
1202 if (cnp->cn_nameiop != LOOKUP &&
1204 cnp->cn_flags |= SAVENAME;
1209 * We only accept a positive hit in the cache if the
1210 * change time of the file matches our cached copy.
1211 * Otherwise, we discard the cache entry and fallback
1212 * to doing a lookup RPC. We also only trust cache
1213 * entries for less than nm_nametimeo seconds.
1215 * To better handle stale file handles and attributes,
1216 * clear the attribute cache of this node if it is a
1217 * leaf component, part of an open() call, and not
1218 * locally modified before fetching the attributes.
1219 * This should allow stale file handles to be detected
1220 * here where we can fall back to a LOOKUP RPC to
1221 * recover rather than having nfs_open() detect the
1222 * stale file handle and failing open(2) with ESTALE.
1225 newnp = VTONFS(newvp);
1226 if (!(nmp->nm_flag & NFSMNT_NOCTO) &&
1227 (flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) &&
1228 !(newnp->n_flag & NMODIFIED)) {
1230 newnp->n_attrstamp = 0;
1231 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp);
1232 NFSUNLOCKNODE(newnp);
1234 if (nfscl_nodeleg(newvp, 0) == 0 ||
1235 ((u_int)(ticks - ncticks) < (nmp->nm_nametimeo * hz) &&
1236 VOP_GETATTR(newvp, &vattr, cnp->cn_cred) == 0 &&
1237 timespeccmp(&vattr.va_ctime, &nctime, ==))) {
1238 NFSINCRGLOBAL(nfsstatsv1.lookupcache_hits);
1239 if (cnp->cn_nameiop != LOOKUP &&
1241 cnp->cn_flags |= SAVENAME;
1250 } else if (error == ENOENT) {
1251 if (VN_IS_DOOMED(dvp))
1254 * We only accept a negative hit in the cache if the
1255 * modification time of the parent directory matches
1256 * the cached copy in the name cache entry.
1257 * Otherwise, we discard all of the negative cache
1258 * entries for this directory. We also only trust
1259 * negative cache entries for up to nm_negnametimeo
1262 if ((u_int)(ticks - ncticks) < (nmp->nm_negnametimeo * hz) &&
1263 VOP_GETATTR(dvp, &vattr, cnp->cn_cred) == 0 &&
1264 timespeccmp(&vattr.va_mtime, &nctime, ==)) {
1265 NFSINCRGLOBAL(nfsstatsv1.lookupcache_hits);
1268 cache_purge_negative(dvp);
1272 * If this an NFSv4.1/4.2 mount using the "oneopenown" mount
1273 * option, it is possible to do the Open operation in the same
1274 * compound as Lookup, so long as delegations are not being
1275 * issued. This saves doing a separate RPC for Open.
1279 if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp) &&
1280 (nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0 &&
1281 (!NFSMNT_RDONLY(mp) || (flags & OPENWRITE) == 0) &&
1282 (flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN)) {
1283 if ((flags & OPENREAD) != 0)
1284 openmode |= NFSV4OPEN_ACCESSREAD;
1285 if ((flags & OPENWRITE) != 0)
1286 openmode |= NFSV4OPEN_ACCESSWRITE;
1291 NFSINCRGLOBAL(nfsstatsv1.lookupcache_misses);
1292 error = nfsrpc_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1293 cnp->cn_cred, td, &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1296 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1298 if (newvp != NULLVP) {
1303 if (error != ENOENT) {
1305 error = nfscl_maperr(td, error, (uid_t)0,
1310 /* The requested file was not found. */
1311 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
1312 (flags & ISLASTCN)) {
1314 * XXX: UFS does a full VOP_ACCESS(dvp,
1315 * VWRITE) here instead of just checking
1318 if (mp->mnt_flag & MNT_RDONLY)
1320 cnp->cn_flags |= SAVENAME;
1321 return (EJUSTRETURN);
1324 if ((cnp->cn_flags & MAKEENTRY) != 0 && dattrflag) {
1326 * Cache the modification time of the parent
1327 * directory from the post-op attributes in
1328 * the name cache entry. The negative cache
1329 * entry will be ignored once the directory
1330 * has changed. Don't bother adding the entry
1331 * if the directory has already changed.
1334 if (timespeccmp(&np->n_vattr.na_mtime,
1335 &dnfsva.na_mtime, ==)) {
1337 cache_enter_time(dvp, NULL, cnp,
1338 &dnfsva.na_mtime, NULL);
1346 * Handle RENAME case...
1348 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) {
1349 if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
1350 free(nfhp, M_NFSFH);
1353 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL,
1359 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1362 cnp->cn_flags |= SAVENAME;
1366 if (flags & ISDOTDOT) {
1367 ltype = NFSVOPISLOCKED(dvp);
1368 error = vfs_busy(mp, MBF_NOWAIT);
1372 error = vfs_busy(mp, 0);
1373 NFSVOPLOCK(dvp, ltype | LK_RETRY);
1375 if (error == 0 && VN_IS_DOOMED(dvp)) {
1383 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL,
1389 NFSVOPLOCK(dvp, ltype | LK_RETRY);
1390 if (VN_IS_DOOMED(dvp)) {
1402 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1404 } else if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
1405 free(nfhp, M_NFSFH);
1409 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1412 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL,
1418 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1420 else if ((flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) &&
1421 !(np->n_flag & NMODIFIED)) {
1423 * Flush the attribute cache when opening a
1424 * leaf node to ensure that fresh attributes
1425 * are fetched in nfs_open() since we did not
1426 * fetch attributes from the LOOKUP reply.
1429 np->n_attrstamp = 0;
1430 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp);
1434 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
1435 cnp->cn_flags |= SAVENAME;
1436 if ((cnp->cn_flags & MAKEENTRY) && dvp != newvp &&
1437 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN)) &&
1438 attrflag != 0 && (newvp->v_type != VDIR || dattrflag != 0))
1439 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime,
1440 newvp->v_type != VDIR ? NULL : &dnfsva.na_ctime);
1447 * Just call ncl_bioread() to do the work.
1450 nfs_read(struct vop_read_args *ap)
1452 struct vnode *vp = ap->a_vp;
1454 switch (vp->v_type) {
1456 return (ncl_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
1460 return (EOPNOTSUPP);
1468 nfs_readlink(struct vop_readlink_args *ap)
1470 struct vnode *vp = ap->a_vp;
1472 if (vp->v_type != VLNK)
1474 return (ncl_bioread(vp, ap->a_uio, 0, ap->a_cred));
1478 * Do a readlink rpc.
1479 * Called by ncl_doio() from below the buffer cache.
1482 ncl_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1484 int error, ret, attrflag;
1485 struct nfsvattr nfsva;
1487 error = nfsrpc_readlink(vp, uiop, cred, uiop->uio_td, &nfsva,
1490 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1494 if (error && NFS_ISV4(vp))
1495 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1504 ncl_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1506 int error, ret, attrflag;
1507 struct nfsvattr nfsva;
1508 struct nfsmount *nmp;
1510 nmp = VFSTONFS(vp->v_mount);
1513 if (NFSHASPNFS(nmp))
1514 error = nfscl_doiods(vp, uiop, NULL, NULL,
1515 NFSV4OPEN_ACCESSREAD, 0, cred, uiop->uio_td);
1516 NFSCL_DEBUG(4, "readrpc: aft doiods=%d\n", error);
1518 error = nfsrpc_read(vp, uiop, cred, uiop->uio_td, &nfsva,
1521 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1525 if (error && NFS_ISV4(vp))
1526 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1534 ncl_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
1535 int *iomode, int *must_commit, int called_from_strategy)
1537 struct nfsvattr nfsva;
1538 int error, attrflag, ret;
1539 struct nfsmount *nmp;
1541 nmp = VFSTONFS(vp->v_mount);
1544 if (NFSHASPNFS(nmp))
1545 error = nfscl_doiods(vp, uiop, iomode, must_commit,
1546 NFSV4OPEN_ACCESSWRITE, 0, cred, uiop->uio_td);
1547 NFSCL_DEBUG(4, "writerpc: aft doiods=%d\n", error);
1549 error = nfsrpc_write(vp, uiop, iomode, must_commit, cred,
1550 uiop->uio_td, &nfsva, &attrflag, NULL,
1551 called_from_strategy);
1553 if (VTONFS(vp)->n_flag & ND_NFSV4)
1554 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 1,
1557 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
1563 *iomode = NFSWRITE_FILESYNC;
1564 if (error && NFS_ISV4(vp))
1565 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1571 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1572 * mode set to specify the file type and the size field for rdev.
1575 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1578 struct nfsvattr nfsva, dnfsva;
1579 struct vnode *newvp = NULL;
1580 struct nfsnode *np = NULL, *dnp;
1583 int error = 0, attrflag, dattrflag;
1586 if (vap->va_type == VCHR || vap->va_type == VBLK)
1587 rdev = vap->va_rdev;
1588 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1591 return (EOPNOTSUPP);
1592 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1594 error = nfsrpc_mknod(dvp, cnp->cn_nameptr, cnp->cn_namelen, vap,
1595 rdev, vap->va_type, cnp->cn_cred, cnp->cn_thread, &dnfsva,
1596 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
1599 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1600 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1601 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1604 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1605 cnp->cn_thread, &np, NULL, LK_EXCLUSIVE);
1608 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1611 if (attrflag != 0) {
1612 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1620 } else if (NFS_ISV4(dvp)) {
1621 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1626 dnp->n_flag |= NMODIFIED;
1628 dnp->n_attrstamp = 0;
1629 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1637 * just call nfs_mknodrpc() to do the work.
1641 nfs_mknod(struct vop_mknod_args *ap)
1643 return (nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap));
1646 static struct mtx nfs_cverf_mtx;
1647 MTX_SYSINIT(nfs_cverf_mtx, &nfs_cverf_mtx, "NFS create verifier mutex",
1653 static nfsquad_t cverf;
1655 static int cverf_initialized = 0;
1657 mtx_lock(&nfs_cverf_mtx);
1658 if (cverf_initialized == 0) {
1659 cverf.lval[0] = arc4random();
1660 cverf.lval[1] = arc4random();
1661 cverf_initialized = 1;
1665 mtx_unlock(&nfs_cverf_mtx);
1671 * nfs file create call
1674 nfs_create(struct vop_create_args *ap)
1676 struct vnode *dvp = ap->a_dvp;
1677 struct vattr *vap = ap->a_vap;
1678 struct componentname *cnp = ap->a_cnp;
1679 struct nfsnode *np = NULL, *dnp;
1680 struct vnode *newvp = NULL;
1681 struct nfsmount *nmp;
1682 struct nfsvattr dnfsva, nfsva;
1685 int error = 0, attrflag, dattrflag, fmode = 0;
1689 * Oops, not for me..
1691 if (vap->va_type == VSOCK)
1692 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1694 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1696 if (vap->va_vaflags & VA_EXCLUSIVE)
1699 nmp = VFSTONFS(dvp->v_mount);
1701 /* For NFSv4, wait until any remove is done. */
1703 while (NFSHASNFSV4(nmp) && (dnp->n_flag & NREMOVEINPROG)) {
1704 dnp->n_flag |= NREMOVEWANT;
1705 (void) msleep((caddr_t)dnp, &dnp->n_mtx, PZERO, "nfscrt", 0);
1709 cverf = nfs_get_cverf();
1710 error = nfsrpc_create(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1711 vap, cverf, fmode, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva,
1712 &nfhp, &attrflag, &dattrflag, NULL);
1715 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1716 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1717 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1720 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1721 cnp->cn_thread, &np, NULL, LK_EXCLUSIVE);
1724 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1728 error = nfsrpc_getattr(newvp, cnp->cn_cred,
1729 cnp->cn_thread, &nfsva, NULL);
1731 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1735 if (newvp != NULL) {
1739 if (NFS_ISV34(dvp) && (fmode & O_EXCL) &&
1740 error == NFSERR_NOTSUPP) {
1744 } else if (NFS_ISV34(dvp) && (fmode & O_EXCL)) {
1745 if (nfscl_checksattr(vap, &nfsva)) {
1746 error = nfsrpc_setattr(newvp, vap, NULL, cnp->cn_cred,
1747 cnp->cn_thread, &nfsva, &attrflag, NULL);
1748 if (error && (vap->va_uid != (uid_t)VNOVAL ||
1749 vap->va_gid != (gid_t)VNOVAL)) {
1750 /* try again without setting uid/gid */
1751 vap->va_uid = (uid_t)VNOVAL;
1752 vap->va_gid = (uid_t)VNOVAL;
1753 error = nfsrpc_setattr(newvp, vap, NULL,
1754 cnp->cn_cred, cnp->cn_thread, &nfsva,
1758 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
1765 if ((cnp->cn_flags & MAKEENTRY) && attrflag) {
1767 cache_enter_time(dvp, newvp, cnp,
1768 &nfsva.na_ctime, NULL);
1770 printf("nfs_create: bogus NFS server returned "
1771 "the directory as the new file object\n");
1774 } else if (NFS_ISV4(dvp)) {
1775 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1779 dnp->n_flag |= NMODIFIED;
1781 dnp->n_attrstamp = 0;
1782 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1789 * nfs file remove call
1790 * To try and make nfs semantics closer to ufs semantics, a file that has
1791 * other processes using the vnode is renamed instead of removed and then
1792 * removed later on the last close.
1793 * - If v_usecount > 1
1794 * If a rename is not already in the works
1795 * call nfs_sillyrename() to set it up
1800 nfs_remove(struct vop_remove_args *ap)
1802 struct vnode *vp = ap->a_vp;
1803 struct vnode *dvp = ap->a_dvp;
1804 struct componentname *cnp = ap->a_cnp;
1805 struct nfsnode *np = VTONFS(vp);
1809 KASSERT((cnp->cn_flags & HASBUF) != 0, ("nfs_remove: no name"));
1810 KASSERT(vrefcnt(vp) > 0, ("nfs_remove: bad v_usecount"));
1811 if (vp->v_type == VDIR)
1813 else if (vrefcnt(vp) == 1 || (np->n_sillyrename &&
1814 VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 &&
1815 vattr.va_nlink > 1)) {
1817 * Purge the name cache so that the chance of a lookup for
1818 * the name succeeding while the remove is in progress is
1819 * minimized. Without node locking it can still happen, such
1820 * that an I/O op returns ESTALE, but since you get this if
1821 * another host removes the file..
1825 * throw away biocache buffers, mainly to avoid
1826 * unnecessary delayed writes later.
1828 error = ncl_vinvalbuf(vp, 0, cnp->cn_thread, 1);
1829 if (error != EINTR && error != EIO)
1831 error = nfs_removerpc(dvp, vp, cnp->cn_nameptr,
1832 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread);
1834 * Kludge City: If the first reply to the remove rpc is lost..
1835 * the reply to the retransmitted request will be ENOENT
1836 * since the file was in fact removed
1837 * Therefore, we cheat and return success.
1839 if (error == ENOENT)
1841 } else if (!np->n_sillyrename)
1842 error = nfs_sillyrename(dvp, vp, cnp);
1844 np->n_attrstamp = 0;
1846 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
1851 * nfs file remove rpc called from nfs_inactive
1854 ncl_removeit(struct sillyrename *sp, struct vnode *vp)
1857 * Make sure that the directory vnode is still valid.
1858 * XXX we should lock sp->s_dvp here.
1860 if (sp->s_dvp->v_type == VBAD)
1862 return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen,
1867 * Nfs remove rpc, called from nfs_remove() and ncl_removeit().
1870 nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
1871 int namelen, struct ucred *cred, struct thread *td)
1873 struct nfsvattr dnfsva;
1874 struct nfsnode *dnp = VTONFS(dvp);
1875 int error = 0, dattrflag;
1878 dnp->n_flag |= NREMOVEINPROG;
1880 error = nfsrpc_remove(dvp, name, namelen, vp, cred, td, &dnfsva,
1883 if ((dnp->n_flag & NREMOVEWANT)) {
1884 dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG);
1886 wakeup((caddr_t)dnp);
1888 dnp->n_flag &= ~NREMOVEINPROG;
1892 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1894 dnp->n_flag |= NMODIFIED;
1896 dnp->n_attrstamp = 0;
1897 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1900 if (error && NFS_ISV4(dvp))
1901 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1906 * nfs file rename call
1909 nfs_rename(struct vop_rename_args *ap)
1911 struct vnode *fvp = ap->a_fvp;
1912 struct vnode *tvp = ap->a_tvp;
1913 struct vnode *fdvp = ap->a_fdvp;
1914 struct vnode *tdvp = ap->a_tdvp;
1915 struct componentname *tcnp = ap->a_tcnp;
1916 struct componentname *fcnp = ap->a_fcnp;
1917 struct nfsnode *fnp = VTONFS(ap->a_fvp);
1918 struct nfsnode *tdnp = VTONFS(ap->a_tdvp);
1919 struct nfsv4node *newv4 = NULL;
1922 KASSERT((tcnp->cn_flags & HASBUF) != 0 &&
1923 (fcnp->cn_flags & HASBUF) != 0, ("nfs_rename: no name"));
1924 /* Check for cross-device rename */
1925 if ((fvp->v_mount != tdvp->v_mount) ||
1926 (tvp && (fvp->v_mount != tvp->v_mount))) {
1932 printf("nfs_rename: fvp == tvp (can't happen)\n");
1936 if ((error = NFSVOPLOCK(fvp, LK_EXCLUSIVE)) != 0)
1940 * We have to flush B_DELWRI data prior to renaming
1941 * the file. If we don't, the delayed-write buffers
1942 * can be flushed out later after the file has gone stale
1943 * under NFSV3. NFSV2 does not have this problem because
1944 * ( as far as I can tell ) it flushes dirty buffers more
1947 * Skip the rename operation if the fsync fails, this can happen
1948 * due to the server's volume being full, when we pushed out data
1949 * that was written back to our cache earlier. Not checking for
1950 * this condition can result in potential (silent) data loss.
1952 error = VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_thread);
1955 error = VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_thread);
1960 * If the tvp exists and is in use, sillyrename it before doing the
1961 * rename of the new file over it.
1962 * XXX Can't sillyrename a directory.
1964 if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename &&
1965 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1970 error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1971 tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1974 if (error == 0 && NFS_ISV4(tdvp)) {
1976 * For NFSv4, check to see if it is the same name and
1977 * replace the name, if it is different.
1980 sizeof (struct nfsv4node) +
1981 tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1,
1982 M_NFSV4NODE, M_WAITOK);
1985 if (fnp->n_v4 != NULL && fvp->v_type == VREG &&
1986 (fnp->n_v4->n4_namelen != tcnp->cn_namelen ||
1987 NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4),
1988 tcnp->cn_namelen) ||
1989 tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen ||
1990 NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1991 tdnp->n_fhp->nfh_len))) {
1993 { char nnn[100]; int nnnl;
1994 nnnl = (tcnp->cn_namelen < 100) ? tcnp->cn_namelen : 99;
1995 bcopy(tcnp->cn_nameptr, nnn, nnnl);
1997 printf("ren replace=%s\n",nnn);
2000 free(fnp->n_v4, M_NFSV4NODE);
2003 fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len;
2004 fnp->n_v4->n4_namelen = tcnp->cn_namelen;
2005 NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
2006 tdnp->n_fhp->nfh_len);
2007 NFSBCOPY(tcnp->cn_nameptr,
2008 NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen);
2010 NFSUNLOCKNODE(tdnp);
2013 free(newv4, M_NFSV4NODE);
2016 if (fvp->v_type == VDIR) {
2017 if (tvp != NULL && tvp->v_type == VDIR)
2032 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
2034 if (error == ENOENT)
2040 * nfs file rename rpc called from nfs_remove() above
2043 nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp,
2044 struct sillyrename *sp)
2047 return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen,
2048 sdvp, NULL, sp->s_name, sp->s_namlen, scnp->cn_cred,
2053 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
2056 nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr,
2057 int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr,
2058 int tnamelen, struct ucred *cred, struct thread *td)
2060 struct nfsvattr fnfsva, tnfsva;
2061 struct nfsnode *fdnp = VTONFS(fdvp);
2062 struct nfsnode *tdnp = VTONFS(tdvp);
2063 int error = 0, fattrflag, tattrflag;
2065 error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp,
2066 tnameptr, tnamelen, cred, td, &fnfsva, &tnfsva, &fattrflag,
2067 &tattrflag, NULL, NULL);
2069 fdnp->n_flag |= NMODIFIED;
2070 if (fattrflag != 0) {
2071 NFSUNLOCKNODE(fdnp);
2072 (void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, NULL, 0, 1);
2074 fdnp->n_attrstamp = 0;
2075 NFSUNLOCKNODE(fdnp);
2076 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(fdvp);
2079 tdnp->n_flag |= NMODIFIED;
2080 if (tattrflag != 0) {
2081 NFSUNLOCKNODE(tdnp);
2082 (void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, NULL, 0, 1);
2084 tdnp->n_attrstamp = 0;
2085 NFSUNLOCKNODE(tdnp);
2086 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
2088 if (error && NFS_ISV4(fdvp))
2089 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2094 * nfs hard link create call
2097 nfs_link(struct vop_link_args *ap)
2099 struct vnode *vp = ap->a_vp;
2100 struct vnode *tdvp = ap->a_tdvp;
2101 struct componentname *cnp = ap->a_cnp;
2102 struct nfsnode *np, *tdnp;
2103 struct nfsvattr nfsva, dnfsva;
2104 int error = 0, attrflag, dattrflag;
2107 * Push all writes to the server, so that the attribute cache
2108 * doesn't get "out of sync" with the server.
2109 * XXX There should be a better way!
2111 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_thread);
2113 error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen,
2114 cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &attrflag,
2116 tdnp = VTONFS(tdvp);
2118 tdnp->n_flag |= NMODIFIED;
2119 if (dattrflag != 0) {
2120 NFSUNLOCKNODE(tdnp);
2121 (void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, NULL, 0, 1);
2123 tdnp->n_attrstamp = 0;
2124 NFSUNLOCKNODE(tdnp);
2125 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
2128 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2132 np->n_attrstamp = 0;
2134 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
2137 * If negative lookup caching is enabled, I might as well
2138 * add an entry for this node. Not necessary for correctness,
2139 * but if negative caching is enabled, then the system
2140 * must care about lookup caching hit rate, so...
2142 if (VFSTONFS(vp->v_mount)->nm_negnametimeo != 0 &&
2143 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) {
2145 cache_enter_time(tdvp, vp, cnp, &nfsva.na_ctime, NULL);
2147 printf("nfs_link: bogus NFS server returned "
2148 "the directory as the new link\n");
2150 if (error && NFS_ISV4(vp))
2151 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
2157 * nfs symbolic link create call
2160 nfs_symlink(struct vop_symlink_args *ap)
2162 struct vnode *dvp = ap->a_dvp;
2163 struct vattr *vap = ap->a_vap;
2164 struct componentname *cnp = ap->a_cnp;
2165 struct nfsvattr nfsva, dnfsva;
2167 struct nfsnode *np = NULL, *dnp;
2168 struct vnode *newvp = NULL;
2169 int error = 0, attrflag, dattrflag, ret;
2171 vap->va_type = VLNK;
2172 error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2173 ap->a_target, vap, cnp->cn_cred, cnp->cn_thread, &dnfsva,
2174 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
2176 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
2177 &np, NULL, LK_EXCLUSIVE);
2183 if (newvp != NULL) {
2185 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2187 } else if (!error) {
2189 * If we do not have an error and we could not extract the
2190 * newvp from the response due to the request being NFSv2, we
2191 * have to do a lookup in order to obtain a newvp to return.
2193 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2194 cnp->cn_cred, cnp->cn_thread, &np);
2202 error = nfscl_maperr(cnp->cn_thread, error,
2203 vap->va_uid, vap->va_gid);
2210 dnp->n_flag |= NMODIFIED;
2211 if (dattrflag != 0) {
2213 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2215 dnp->n_attrstamp = 0;
2217 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2220 * If negative lookup caching is enabled, I might as well
2221 * add an entry for this node. Not necessary for correctness,
2222 * but if negative caching is enabled, then the system
2223 * must care about lookup caching hit rate, so...
2225 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
2226 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) {
2228 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime,
2231 printf("nfs_symlink: bogus NFS server returned "
2232 "the directory as the new file object\n");
2241 nfs_mkdir(struct vop_mkdir_args *ap)
2243 struct vnode *dvp = ap->a_dvp;
2244 struct vattr *vap = ap->a_vap;
2245 struct componentname *cnp = ap->a_cnp;
2246 struct nfsnode *np = NULL, *dnp;
2247 struct vnode *newvp = NULL;
2250 struct nfsvattr nfsva, dnfsva;
2251 int error = 0, attrflag, dattrflag, ret;
2253 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0)
2255 vap->va_type = VDIR;
2256 error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2257 vap, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &nfhp,
2258 &attrflag, &dattrflag, NULL);
2261 dnp->n_flag |= NMODIFIED;
2262 if (dattrflag != 0) {
2264 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2266 dnp->n_attrstamp = 0;
2268 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2271 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
2272 &np, NULL, LK_EXCLUSIVE);
2276 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
2281 if (!error && newvp == NULL) {
2282 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2283 cnp->cn_cred, cnp->cn_thread, &np);
2286 if (newvp->v_type != VDIR)
2294 error = nfscl_maperr(cnp->cn_thread, error,
2295 vap->va_uid, vap->va_gid);
2298 * If negative lookup caching is enabled, I might as well
2299 * add an entry for this node. Not necessary for correctness,
2300 * but if negative caching is enabled, then the system
2301 * must care about lookup caching hit rate, so...
2303 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
2304 (cnp->cn_flags & MAKEENTRY) &&
2305 attrflag != 0 && dattrflag != 0) {
2307 cache_enter_time(dvp, newvp, cnp,
2308 &nfsva.na_ctime, &dnfsva.na_ctime);
2310 printf("nfs_mkdir: bogus NFS server returned "
2311 "the directory that the directory was "
2312 "created in as the new file object\n");
2320 * nfs remove directory call
2323 nfs_rmdir(struct vop_rmdir_args *ap)
2325 struct vnode *vp = ap->a_vp;
2326 struct vnode *dvp = ap->a_dvp;
2327 struct componentname *cnp = ap->a_cnp;
2328 struct nfsnode *dnp;
2329 struct nfsvattr dnfsva;
2330 int error, dattrflag;
2334 error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2335 cnp->cn_cred, cnp->cn_thread, &dnfsva, &dattrflag, NULL);
2338 dnp->n_flag |= NMODIFIED;
2339 if (dattrflag != 0) {
2341 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2343 dnp->n_attrstamp = 0;
2345 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2350 if (error && NFS_ISV4(dvp))
2351 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
2354 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2356 if (error == ENOENT)
2365 nfs_readdir(struct vop_readdir_args *ap)
2367 struct vnode *vp = ap->a_vp;
2368 struct nfsnode *np = VTONFS(vp);
2369 struct uio *uio = ap->a_uio;
2370 ssize_t tresid, left;
2374 if (ap->a_eofflag != NULL)
2376 if (vp->v_type != VDIR)
2380 * First, check for hit on the EOF offset cache
2383 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2384 (np->n_flag & NMODIFIED) == 0) {
2386 if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) {
2388 if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) ||
2389 !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
2391 NFSINCRGLOBAL(nfsstatsv1.direofcache_hits);
2392 if (ap->a_eofflag != NULL)
2402 * NFS always guarantees that directory entries don't straddle
2403 * DIRBLKSIZ boundaries. As such, we need to limit the size
2404 * to an exact multiple of DIRBLKSIZ, to avoid copying a partial
2407 left = uio->uio_resid % DIRBLKSIZ;
2408 if (left == uio->uio_resid)
2410 uio->uio_resid -= left;
2413 * Call ncl_bioread() to do the real work.
2415 tresid = uio->uio_resid;
2416 error = ncl_bioread(vp, uio, 0, ap->a_cred);
2418 if (!error && uio->uio_resid == tresid) {
2419 NFSINCRGLOBAL(nfsstatsv1.direofcache_misses);
2420 if (ap->a_eofflag != NULL)
2424 /* Add the partial DIRBLKSIZ (left) back in. */
2425 uio->uio_resid += left;
2431 * Called from below the buffer cache by ncl_doio().
2434 ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2437 struct nfsvattr nfsva;
2438 nfsuint64 *cookiep, cookie;
2439 struct nfsnode *dnp = VTONFS(vp);
2440 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2441 int error = 0, eof, attrflag;
2443 KASSERT(uiop->uio_iovcnt == 1 &&
2444 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
2445 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
2446 ("nfs readdirrpc bad uio"));
2449 * If there is no cookie, assume directory was stale.
2451 ncl_dircookie_lock(dnp);
2453 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2456 ncl_dircookie_unlock(dnp);
2458 ncl_dircookie_unlock(dnp);
2459 return (NFSERR_BAD_COOKIE);
2462 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2463 (void)ncl_fsinfo(nmp, vp, cred, td);
2465 error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva,
2466 &attrflag, &eof, NULL);
2468 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2472 * We are now either at the end of the directory or have filled
2477 dnp->n_direofoffset = uiop->uio_offset;
2480 if (uiop->uio_resid > 0)
2481 printf("EEK! readdirrpc resid > 0\n");
2482 ncl_dircookie_lock(dnp);
2484 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2486 ncl_dircookie_unlock(dnp);
2488 } else if (NFS_ISV4(vp)) {
2489 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2495 * NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc().
2498 ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2501 struct nfsvattr nfsva;
2502 nfsuint64 *cookiep, cookie;
2503 struct nfsnode *dnp = VTONFS(vp);
2504 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2505 int error = 0, attrflag, eof;
2507 KASSERT(uiop->uio_iovcnt == 1 &&
2508 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
2509 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
2510 ("nfs readdirplusrpc bad uio"));
2513 * If there is no cookie, assume directory was stale.
2515 ncl_dircookie_lock(dnp);
2517 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2520 ncl_dircookie_unlock(dnp);
2522 ncl_dircookie_unlock(dnp);
2523 return (NFSERR_BAD_COOKIE);
2526 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2527 (void)ncl_fsinfo(nmp, vp, cred, td);
2528 error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva,
2529 &attrflag, &eof, NULL);
2531 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2535 * We are now either at end of the directory or have filled the
2540 dnp->n_direofoffset = uiop->uio_offset;
2543 if (uiop->uio_resid > 0)
2544 printf("EEK! readdirplusrpc resid > 0\n");
2545 ncl_dircookie_lock(dnp);
2547 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2549 ncl_dircookie_unlock(dnp);
2551 } else if (NFS_ISV4(vp)) {
2552 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2558 * Silly rename. To make the NFS filesystem that is stateless look a little
2559 * more like the "ufs" a remove of an active vnode is translated to a rename
2560 * to a funny looking filename that is removed by nfs_inactive on the
2561 * nfsnode. There is the potential for another process on a different client
2562 * to create the same funny name between the nfs_lookitup() fails and the
2563 * nfs_rename() completes, but...
2566 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2568 struct sillyrename *sp;
2572 unsigned int lticks;
2576 KASSERT(vp->v_type != VDIR, ("nfs: sillyrename dir"));
2577 sp = malloc(sizeof (struct sillyrename),
2578 M_NEWNFSREQ, M_WAITOK);
2579 sp->s_cred = crhold(cnp->cn_cred);
2584 * Fudge together a funny name.
2585 * Changing the format of the funny name to accommodate more
2586 * sillynames per directory.
2587 * The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is
2588 * CPU ticks since boot.
2590 pid = cnp->cn_thread->td_proc->p_pid;
2591 lticks = (unsigned int)ticks;
2593 sp->s_namlen = sprintf(sp->s_name,
2594 ".nfs.%08x.%04x4.4", lticks,
2596 if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2597 cnp->cn_thread, NULL))
2601 error = nfs_renameit(dvp, vp, cnp, sp);
2604 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2605 cnp->cn_thread, &np);
2606 np->n_sillyrename = sp;
2611 free(sp, M_NEWNFSREQ);
2616 * Look up a file name and optionally either update the file handle or
2617 * allocate an nfsnode, depending on the value of npp.
2618 * npp == NULL --> just do the lookup
2619 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2621 * *npp != NULL --> update the file handle in the vnode
2624 nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred,
2625 struct thread *td, struct nfsnode **npp)
2627 struct vnode *newvp = NULL, *vp;
2628 struct nfsnode *np, *dnp = VTONFS(dvp);
2629 struct nfsfh *nfhp, *onfhp;
2630 struct nfsvattr nfsva, dnfsva;
2631 struct componentname cn;
2632 int error = 0, attrflag, dattrflag;
2635 error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva,
2636 &nfhp, &attrflag, &dattrflag, NULL, 0);
2638 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2639 if (npp && !error) {
2644 * For NFSv4, check to see if it is the same name and
2645 * replace the name, if it is different.
2647 if (np->n_v4 != NULL && nfsva.na_type == VREG &&
2648 (np->n_v4->n4_namelen != len ||
2649 NFSBCMP(name, NFS4NODENAME(np->n_v4), len) ||
2650 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
2651 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2652 dnp->n_fhp->nfh_len))) {
2654 { char nnn[100]; int nnnl;
2655 nnnl = (len < 100) ? len : 99;
2656 bcopy(name, nnn, nnnl);
2658 printf("replace=%s\n",nnn);
2661 free(np->n_v4, M_NFSV4NODE);
2663 sizeof (struct nfsv4node) +
2664 dnp->n_fhp->nfh_len + len - 1,
2665 M_NFSV4NODE, M_WAITOK);
2666 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
2667 np->n_v4->n4_namelen = len;
2668 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2669 dnp->n_fhp->nfh_len);
2670 NFSBCOPY(name, NFS4NODENAME(np->n_v4), len);
2672 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len,
2676 * Rehash node for new file handle.
2678 vfs_hash_rehash(vp, hash);
2681 free(onfhp, M_NFSFH);
2683 } else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) {
2684 free(nfhp, M_NFSFH);
2688 cn.cn_nameptr = name;
2689 cn.cn_namelen = len;
2690 error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td,
2691 &np, NULL, LK_EXCLUSIVE);
2696 if (!attrflag && *npp == NULL) {
2704 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2707 if (npp && *npp == NULL) {
2718 if (error && NFS_ISV4(dvp))
2719 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2724 * Nfs Version 3 and 4 commit rpc
2727 ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred,
2730 struct nfsvattr nfsva;
2731 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2734 int error, attrflag;
2739 if (NFSHASPNFS(nmp) && (np->n_flag & NDSCOMMIT) != 0) {
2740 uio.uio_offset = offset;
2741 uio.uio_resid = cnt;
2742 error = nfscl_doiods(vp, &uio, NULL, NULL,
2743 NFSV4OPEN_ACCESSWRITE, 1, cred, td);
2746 np->n_flag &= ~NDSCOMMIT;
2751 mtx_lock(&nmp->nm_mtx);
2752 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) {
2753 mtx_unlock(&nmp->nm_mtx);
2756 mtx_unlock(&nmp->nm_mtx);
2757 error = nfsrpc_commit(vp, offset, cnt, cred, td, &nfsva,
2761 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL,
2763 if (error != 0 && NFS_ISV4(vp))
2764 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2770 * For async requests when nfsiod(s) are running, queue the request by
2771 * calling ncl_asyncio(), otherwise just all ncl_doio() to do the
2775 nfs_strategy(struct vop_strategy_args *ap)
2783 KASSERT(bp->b_vp == vp, ("missing b_getvp"));
2784 KASSERT(!(bp->b_flags & B_DONE),
2785 ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2787 if (vp->v_type == VREG && bp->b_blkno == bp->b_lblkno)
2788 bp->b_blkno = bp->b_lblkno * (vp->v_bufobj.bo_bsize /
2790 if (bp->b_iocmd == BIO_READ)
2796 * If the op is asynchronous and an i/o daemon is waiting
2797 * queue the request, wake it up and wait for completion
2798 * otherwise just do it ourselves.
2800 if ((bp->b_flags & B_ASYNC) == 0 ||
2801 ncl_asyncio(VFSTONFS(vp->v_mount), bp, NOCRED, curthread))
2802 (void) ncl_doio(vp, bp, cr, curthread, 1);
2807 * fsync vnode op. Just call ncl_flush() with commit == 1.
2811 nfs_fsync(struct vop_fsync_args *ap)
2814 if (ap->a_vp->v_type != VREG) {
2816 * For NFS, metadata is changed synchronously on the server,
2817 * so there is nothing to flush. Also, ncl_flush() clears
2818 * the NMODIFIED flag and that shouldn't be done here for
2823 return (ncl_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1, 0));
2827 * Flush all the blocks associated with a vnode.
2828 * Walk through the buffer pool and push any dirty pages
2829 * associated with the vnode.
2830 * If the called_from_renewthread argument is TRUE, it has been called
2831 * from the NFSv4 renew thread and, as such, cannot block indefinitely
2832 * waiting for a buffer write to complete.
2835 ncl_flush(struct vnode *vp, int waitfor, struct thread *td,
2836 int commit, int called_from_renewthread)
2838 struct nfsnode *np = VTONFS(vp);
2842 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2843 int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2844 int passone = 1, trycnt = 0;
2845 u_quad_t off, endoff, toff;
2846 struct ucred* wcred = NULL;
2847 struct buf **bvec = NULL;
2849 #ifndef NFS_COMMITBVECSIZ
2850 #define NFS_COMMITBVECSIZ 20
2852 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2853 u_int bvecsize = 0, bveccount;
2855 if (called_from_renewthread != 0)
2857 if (nmp->nm_flag & NFSMNT_INT)
2863 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2864 * server, but has not been committed to stable storage on the server
2865 * yet. On the first pass, the byte range is worked out and the commit
2866 * rpc is done. On the second pass, ncl_writebp() is called to do the
2873 if (NFS_ISV34(vp) && commit) {
2874 if (bvec != NULL && bvec != bvec_on_stack)
2877 * Count up how many buffers waiting for a commit.
2881 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2882 if (!BUF_ISLOCKED(bp) &&
2883 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2884 == (B_DELWRI | B_NEEDCOMMIT))
2888 * Allocate space to remember the list of bufs to commit. It is
2889 * important to use M_NOWAIT here to avoid a race with nfs_write.
2890 * If we can't get memory (for whatever reason), we will end up
2891 * committing the buffers one-by-one in the loop below.
2893 if (bveccount > NFS_COMMITBVECSIZ) {
2895 * Release the vnode interlock to avoid a lock
2899 bvec = (struct buf **)
2900 malloc(bveccount * sizeof(struct buf *),
2904 bvec = bvec_on_stack;
2905 bvecsize = NFS_COMMITBVECSIZ;
2907 bvecsize = bveccount;
2909 bvec = bvec_on_stack;
2910 bvecsize = NFS_COMMITBVECSIZ;
2912 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2913 if (bvecpos >= bvecsize)
2915 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2916 nbp = TAILQ_NEXT(bp, b_bobufs);
2919 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2920 (B_DELWRI | B_NEEDCOMMIT)) {
2922 nbp = TAILQ_NEXT(bp, b_bobufs);
2928 * Work out if all buffers are using the same cred
2929 * so we can deal with them all with one commit.
2931 * NOTE: we are not clearing B_DONE here, so we have
2932 * to do it later on in this routine if we intend to
2933 * initiate I/O on the bp.
2935 * Note: to avoid loopback deadlocks, we do not
2936 * assign b_runningbufspace.
2939 wcred = bp->b_wcred;
2940 else if (wcred != bp->b_wcred)
2942 vfs_busy_pages(bp, 1);
2946 * bp is protected by being locked, but nbp is not
2947 * and vfs_busy_pages() may sleep. We have to
2950 nbp = TAILQ_NEXT(bp, b_bobufs);
2953 * A list of these buffers is kept so that the
2954 * second loop knows which buffers have actually
2955 * been committed. This is necessary, since there
2956 * may be a race between the commit rpc and new
2957 * uncommitted writes on the file.
2959 bvec[bvecpos++] = bp;
2960 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2964 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2972 * Commit data on the server, as required.
2973 * If all bufs are using the same wcred, then use that with
2974 * one call for all of them, otherwise commit each one
2977 if (wcred != NOCRED)
2978 retv = ncl_commit(vp, off, (int)(endoff - off),
2982 for (i = 0; i < bvecpos; i++) {
2985 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2987 size = (u_quad_t)(bp->b_dirtyend
2989 retv = ncl_commit(vp, off, (int)size,
2995 if (retv == NFSERR_STALEWRITEVERF)
2996 ncl_clearcommit(vp->v_mount);
2999 * Now, either mark the blocks I/O done or mark the
3000 * blocks dirty, depending on whether the commit
3003 for (i = 0; i < bvecpos; i++) {
3005 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
3008 * Error, leave B_DELWRI intact
3010 vfs_unbusy_pages(bp);
3014 * Success, remove B_DELWRI ( bundirty() ).
3016 * b_dirtyoff/b_dirtyend seem to be NFS
3017 * specific. We should probably move that
3018 * into bundirty(). XXX
3021 bp->b_flags |= B_ASYNC;
3023 bp->b_flags &= ~B_DONE;
3024 bp->b_ioflags &= ~BIO_ERROR;
3025 bp->b_dirtyoff = bp->b_dirtyend = 0;
3032 * Start/do any write(s) that are required.
3036 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
3037 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
3038 if (waitfor != MNT_WAIT || passone)
3041 error = BUF_TIMELOCK(bp,
3042 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK,
3043 BO_LOCKPTR(bo), "nfsfsync", slpflag, slptimeo);
3048 if (error == ENOLCK) {
3052 if (called_from_renewthread != 0) {
3054 * Return EIO so the flush will be retried
3060 if (newnfs_sigintr(nmp, td)) {
3064 if (slpflag == PCATCH) {
3070 if ((bp->b_flags & B_DELWRI) == 0)
3071 panic("nfs_fsync: not dirty");
3072 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
3078 bp->b_flags |= B_ASYNC;
3080 if (newnfs_sigintr(nmp, td)) {
3091 if (waitfor == MNT_WAIT) {
3092 while (bo->bo_numoutput) {
3093 error = bufobj_wwait(bo, slpflag, slptimeo);
3096 if (called_from_renewthread != 0) {
3098 * Return EIO so that the flush will be
3104 error = newnfs_sigintr(nmp, td);
3107 if (slpflag == PCATCH) {
3114 if (bo->bo_dirty.bv_cnt != 0 && commit) {
3119 * Wait for all the async IO requests to drain
3123 while (np->n_directio_asyncwr > 0) {
3124 np->n_flag |= NFSYNCWAIT;
3125 error = newnfs_msleep(td, &np->n_directio_asyncwr,
3126 &np->n_mtx, slpflag | (PRIBIO + 1),
3129 if (newnfs_sigintr(nmp, td)) {
3139 if (NFSHASPNFS(nmp)) {
3140 nfscl_layoutcommit(vp, td);
3142 * Invalidate the attribute cache, since writes to a DS
3143 * won't update the size attribute.
3146 np->n_attrstamp = 0;
3149 if (np->n_flag & NWRITEERR) {
3150 error = np->n_error;
3151 np->n_flag &= ~NWRITEERR;
3153 if (commit && bo->bo_dirty.bv_cnt == 0 &&
3154 bo->bo_numoutput == 0 && np->n_directio_asyncwr == 0)
3155 np->n_flag &= ~NMODIFIED;
3158 if (bvec != NULL && bvec != bvec_on_stack)
3160 if (error == 0 && commit != 0 && waitfor == MNT_WAIT &&
3161 (bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0 ||
3162 np->n_directio_asyncwr != 0)) {
3164 /* try, try again... */
3171 vn_printf(vp, "ncl_flush failed");
3172 error = called_from_renewthread != 0 ? EIO : EBUSY;
3178 * NFS advisory byte-level locks.
3181 nfs_advlock(struct vop_advlock_args *ap)
3183 struct vnode *vp = ap->a_vp;
3185 struct nfsnode *np = VTONFS(ap->a_vp);
3186 struct proc *p = (struct proc *)ap->a_id;
3187 struct thread *td = curthread; /* XXX */
3191 struct nfsmount *nmp;
3193 error = NFSVOPLOCK(vp, LK_SHARED);
3196 if (NFS_ISV4(vp) && (ap->a_flags & (F_POSIX | F_FLOCK)) != 0) {
3197 if (vp->v_type != VREG) {
3201 if ((ap->a_flags & F_POSIX) != 0)
3204 cred = td->td_ucred;
3205 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY);
3206 if (VN_IS_DOOMED(vp)) {
3212 * If this is unlocking a write locked region, flush and
3213 * commit them before unlocking. This is required by
3214 * RFC3530 Sec. 9.3.2.
3216 if (ap->a_op == F_UNLCK &&
3217 nfscl_checkwritelocked(vp, ap->a_fl, cred, td, ap->a_id,
3219 (void) ncl_flush(vp, MNT_WAIT, td, 1, 0);
3222 * Mark NFS node as might have acquired a lock.
3223 * This is separate from NHASBEENLOCKED, because it must
3224 * be done before the nfsrpc_advlock() call, which might
3225 * add a nfscllock structure to the client state.
3226 * It is used to check for the case where a nfscllock
3227 * state structure cannot exist for the file.
3228 * Only done for "oneopenown" NFSv4.1/4.2 mounts.
3230 nmp = VFSTONFS(vp->v_mount);
3231 if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp)) {
3233 np->n_flag |= NMIGHTBELOCKED;
3238 * Loop around doing the lock op, while a blocking lock
3239 * must wait for the lock op to succeed.
3242 ret = nfsrpc_advlock(vp, np->n_size, ap->a_op,
3243 ap->a_fl, 0, cred, td, ap->a_id, ap->a_flags);
3244 if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
3245 ap->a_op == F_SETLK) {
3247 error = nfs_catnap(PZERO | PCATCH, ret,
3251 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
3252 if (VN_IS_DOOMED(vp)) {
3257 } while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
3258 ap->a_op == F_SETLK);
3259 if (ret == NFSERR_DENIED) {
3262 } else if (ret == EINVAL || ret == EBADF || ret == EINTR) {
3265 } else if (ret != 0) {
3271 * Now, if we just got a lock, invalidate data in the buffer
3272 * cache, as required, so that the coherency conforms with
3273 * RFC3530 Sec. 9.3.2.
3275 if (ap->a_op == F_SETLK) {
3276 if ((np->n_flag & NMODIFIED) == 0) {
3277 np->n_attrstamp = 0;
3278 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
3279 ret = VOP_GETATTR(vp, &va, cred);
3281 if ((np->n_flag & NMODIFIED) || ret ||
3282 np->n_change != va.va_filerev) {
3283 (void) ncl_vinvalbuf(vp, V_SAVE, td, 1);
3284 np->n_attrstamp = 0;
3285 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
3286 ret = VOP_GETATTR(vp, &va, cred);
3288 np->n_mtime = va.va_mtime;
3289 np->n_change = va.va_filerev;
3292 /* Mark that a file lock has been acquired. */
3294 np->n_flag |= NHASBEENLOCKED;
3297 } else if (!NFS_ISV4(vp)) {
3298 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
3299 size = VTONFS(vp)->n_size;
3301 error = lf_advlock(ap, &(vp->v_lockf), size);
3303 if (nfs_advlock_p != NULL)
3304 error = nfs_advlock_p(ap);
3310 if (error == 0 && ap->a_op == F_SETLK) {
3311 error = NFSVOPLOCK(vp, LK_SHARED);
3313 /* Mark that a file lock has been acquired. */
3315 np->n_flag |= NHASBEENLOCKED;
3329 * NFS advisory byte-level locks.
3332 nfs_advlockasync(struct vop_advlockasync_args *ap)
3334 struct vnode *vp = ap->a_vp;
3339 return (EOPNOTSUPP);
3340 error = NFSVOPLOCK(vp, LK_SHARED);
3343 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
3344 size = VTONFS(vp)->n_size;
3346 error = lf_advlockasync(ap, &(vp->v_lockf), size);
3355 * Print out the contents of an nfsnode.
3358 nfs_print(struct vop_print_args *ap)
3360 struct vnode *vp = ap->a_vp;
3361 struct nfsnode *np = VTONFS(vp);
3363 printf("\tfileid %jd fsid 0x%jx", (uintmax_t)np->n_vattr.na_fileid,
3364 (uintmax_t)np->n_vattr.na_fsid);
3365 if (vp->v_type == VFIFO)
3372 * This is the "real" nfs::bwrite(struct buf*).
3373 * We set B_CACHE if this is a VMIO buffer.
3376 ncl_writebp(struct buf *bp, int force __unused, struct thread *td)
3378 int oldflags, rtval;
3380 if (bp->b_flags & B_INVAL) {
3385 oldflags = bp->b_flags;
3386 bp->b_flags |= B_CACHE;
3389 * Undirty the bp. We will redirty it later if the I/O fails.
3392 bp->b_flags &= ~B_DONE;
3393 bp->b_ioflags &= ~BIO_ERROR;
3394 bp->b_iocmd = BIO_WRITE;
3396 bufobj_wref(bp->b_bufobj);
3397 curthread->td_ru.ru_oublock++;
3400 * Note: to avoid loopback deadlocks, we do not
3401 * assign b_runningbufspace.
3403 vfs_busy_pages(bp, 1);
3406 bp->b_iooffset = dbtob(bp->b_blkno);
3409 if ((oldflags & B_ASYNC) != 0)
3412 rtval = bufwait(bp);
3413 if (oldflags & B_DELWRI)
3420 * nfs special file access vnode op.
3421 * Essentially just get vattr and then imitate iaccess() since the device is
3422 * local to the client.
3425 nfsspec_access(struct vop_access_args *ap)
3428 struct ucred *cred = ap->a_cred;
3429 struct vnode *vp = ap->a_vp;
3430 accmode_t accmode = ap->a_accmode;
3435 * Disallow write attempts on filesystems mounted read-only;
3436 * unless the file is a socket, fifo, or a block or character
3437 * device resident on the filesystem.
3439 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3440 switch (vp->v_type) {
3450 error = VOP_GETATTR(vp, vap, cred);
3453 error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid,
3460 * Read wrapper for fifos.
3463 nfsfifo_read(struct vop_read_args *ap)
3465 struct nfsnode *np = VTONFS(ap->a_vp);
3473 vfs_timestamp(&np->n_atim);
3475 error = fifo_specops.vop_read(ap);
3480 * Write wrapper for fifos.
3483 nfsfifo_write(struct vop_write_args *ap)
3485 struct nfsnode *np = VTONFS(ap->a_vp);
3492 vfs_timestamp(&np->n_mtim);
3494 return(fifo_specops.vop_write(ap));
3498 * Close wrapper for fifos.
3500 * Update the times on the nfsnode then do fifo close.
3503 nfsfifo_close(struct vop_close_args *ap)
3505 struct vnode *vp = ap->a_vp;
3506 struct nfsnode *np = VTONFS(vp);
3511 if (np->n_flag & (NACC | NUPD)) {
3513 if (np->n_flag & NACC)
3515 if (np->n_flag & NUPD)
3518 if (vrefcnt(vp) == 1 &&
3519 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3521 if (np->n_flag & NACC)
3522 vattr.va_atime = np->n_atim;
3523 if (np->n_flag & NUPD)
3524 vattr.va_mtime = np->n_mtim;
3526 (void)VOP_SETATTR(vp, &vattr, ap->a_cred);
3532 return (fifo_specops.vop_close(ap));
3536 * Just call ncl_writebp() with the force argument set to 1.
3538 * NOTE: B_DONE may or may not be set in a_bp on call.
3541 nfs_bwrite(struct buf *bp)
3544 return (ncl_writebp(bp, 1, curthread));
3547 struct buf_ops buf_ops_newnfs = {
3548 .bop_name = "buf_ops_nfs",
3549 .bop_write = nfs_bwrite,
3550 .bop_strategy = bufstrategy,
3551 .bop_sync = bufsync,
3552 .bop_bdflush = bufbdflush,
3556 nfs_getacl(struct vop_getacl_args *ap)
3560 if (ap->a_type != ACL_TYPE_NFS4)
3561 return (EOPNOTSUPP);
3562 error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3564 if (error > NFSERR_STALE) {
3565 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3572 nfs_setacl(struct vop_setacl_args *ap)
3576 if (ap->a_type != ACL_TYPE_NFS4)
3577 return (EOPNOTSUPP);
3578 error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3580 if (error > NFSERR_STALE) {
3581 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3588 * VOP_ADVISE for NFS.
3589 * Just return 0 for any errors, since it is just a hint.
3592 nfs_advise(struct vop_advise_args *ap)
3594 struct thread *td = curthread;
3595 struct nfsmount *nmp;
3600 * First do vop_stdadvise() to handle the buffer cache.
3602 error = vop_stdadvise(ap);
3605 if (ap->a_start < 0 || ap->a_end < 0)
3607 if (ap->a_end == OFF_MAX)
3609 else if (ap->a_end < ap->a_start)
3612 len = ap->a_end - ap->a_start + 1;
3613 nmp = VFSTONFS(ap->a_vp->v_mount);
3614 mtx_lock(&nmp->nm_mtx);
3615 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
3616 (NFSHASPNFS(nmp) && (nmp->nm_privflag & NFSMNTP_IOADVISETHRUMDS) ==
3617 0) || (nmp->nm_privflag & NFSMNTP_NOADVISE) != 0) {
3618 mtx_unlock(&nmp->nm_mtx);
3621 mtx_unlock(&nmp->nm_mtx);
3622 error = nfsrpc_advise(ap->a_vp, ap->a_start, len, ap->a_advice,
3624 if (error == NFSERR_NOTSUPP) {
3625 mtx_lock(&nmp->nm_mtx);
3626 nmp->nm_privflag |= NFSMNTP_NOADVISE;
3627 mtx_unlock(&nmp->nm_mtx);
3636 nfs_allocate(struct vop_allocate_args *ap)
3638 struct vnode *vp = ap->a_vp;
3639 struct thread *td = curthread;
3640 struct nfsvattr nfsva;
3641 struct nfsmount *nmp;
3642 int attrflag, error, ret;
3645 nmp = VFSTONFS(vp->v_mount);
3646 mtx_lock(&nmp->nm_mtx);
3647 if (NFSHASNFSV4(nmp) && nmp->nm_minorvers >= NFSV42_MINORVERSION &&
3648 (nmp->nm_privflag & NFSMNTP_NOALLOCATE) == 0) {
3649 mtx_unlock(&nmp->nm_mtx);
3651 * Flush first to ensure that the allocate adds to the
3652 * file's allocation on the server.
3654 error = ncl_flush(vp, MNT_WAIT, td, 1, 0);
3656 error = nfsrpc_allocate(vp, *ap->a_offset, *ap->a_len,
3657 &nfsva, &attrflag, td->td_ucred, td, NULL);
3659 *ap->a_offset += *ap->a_len;
3661 } else if (error == NFSERR_NOTSUPP) {
3662 mtx_lock(&nmp->nm_mtx);
3663 nmp->nm_privflag |= NFSMNTP_NOALLOCATE;
3664 mtx_unlock(&nmp->nm_mtx);
3667 mtx_unlock(&nmp->nm_mtx);
3671 * If the NFS server cannot perform the Allocate operation, just call
3672 * vop_stdallocate() to perform it.
3675 error = vop_stdallocate(ap);
3676 if (attrflag != 0) {
3677 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
3678 if (error == 0 && ret != 0)
3682 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
3687 * nfs deallocate call
3690 nfs_deallocate(struct vop_deallocate_args *ap)
3692 struct vnode *vp = ap->a_vp;
3693 struct thread *td = curthread;
3694 struct nfsvattr nfsva;
3695 struct nfsmount *nmp;
3697 int attrflag, error, ret;
3701 nmp = VFSTONFS(vp->v_mount);
3702 mtx_lock(&nmp->nm_mtx);
3703 if (NFSHASNFSV4(nmp) && nmp->nm_minorvers >= NFSV42_MINORVERSION &&
3704 (nmp->nm_privflag & NFSMNTP_NODEALLOCATE) == 0) {
3705 mtx_unlock(&nmp->nm_mtx);
3706 tlen = omin(OFF_MAX - *ap->a_offset, *ap->a_len);
3707 NFSCL_DEBUG(4, "dealloc: off=%jd len=%jd maxfilesize=%ju\n",
3708 (intmax_t)*ap->a_offset, (intmax_t)tlen,
3709 (uintmax_t)nmp->nm_maxfilesize);
3710 if ((uint64_t)*ap->a_offset >= nmp->nm_maxfilesize) {
3711 /* Avoid EFBIG error return from the NFSv4.2 server. */
3715 if ((uint64_t)*ap->a_offset + tlen > nmp->nm_maxfilesize)
3716 tlen = nmp->nm_maxfilesize - *ap->a_offset;
3718 error = ncl_vinvalbuf(vp, V_SAVE, td, 1);
3720 vnode_pager_purge_range(vp, *ap->a_offset,
3721 *ap->a_offset + tlen);
3722 error = nfsrpc_deallocate(vp, *ap->a_offset, tlen,
3723 &nfsva, &attrflag, ap->a_cred, td, NULL);
3724 NFSCL_DEBUG(4, "dealloc: rpc=%d\n", error);
3727 NFSCL_DEBUG(4, "dealloc: attrflag=%d na_size=%ju\n",
3728 attrflag, (uintmax_t)nfsva.na_size);
3729 if (attrflag != 0) {
3730 if ((uint64_t)*ap->a_offset < nfsva.na_size)
3731 *ap->a_offset += omin((off_t)
3732 nfsva.na_size - *ap->a_offset,
3736 } else if (error == NFSERR_NOTSUPP) {
3737 mtx_lock(&nmp->nm_mtx);
3738 nmp->nm_privflag |= NFSMNTP_NODEALLOCATE;
3739 mtx_unlock(&nmp->nm_mtx);
3742 mtx_unlock(&nmp->nm_mtx);
3746 * If the NFS server cannot perform the Deallocate operation, just call
3747 * vop_stddeallocate() to perform it.
3749 if (error != 0 && error != NFSERR_FBIG && error != NFSERR_INVAL) {
3750 error = vop_stddeallocate(ap);
3751 NFSCL_DEBUG(4, "dealloc: stddeallocate=%d\n", error);
3753 if (attrflag != 0) {
3754 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
3755 if (error == 0 && ret != 0)
3759 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
3764 * nfs copy_file_range call
3767 nfs_copy_file_range(struct vop_copy_file_range_args *ap)
3769 struct vnode *invp = ap->a_invp;
3770 struct vnode *outvp = ap->a_outvp;
3772 struct nfsvattr innfsva, outnfsva;
3775 struct nfsmount *nmp;
3777 int error, inattrflag, outattrflag, ret, ret2;
3778 off_t inoff, outoff;
3779 bool consecutive, must_commit, tryoutcred;
3782 nmp = VFSTONFS(invp->v_mount);
3783 mtx_lock(&nmp->nm_mtx);
3784 /* NFSv4.2 Copy is not permitted for infile == outfile. */
3785 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
3786 (nmp->nm_privflag & NFSMNTP_NOCOPY) != 0 || invp == outvp) {
3787 mtx_unlock(&nmp->nm_mtx);
3788 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp,
3789 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags,
3790 ap->a_incred, ap->a_outcred, ap->a_fsizetd);
3793 mtx_unlock(&nmp->nm_mtx);
3795 /* Lock both vnodes, avoiding risk of deadlock. */
3798 error = vn_start_write(outvp, &mp, V_WAIT);
3800 error = vn_lock(outvp, LK_EXCLUSIVE);
3802 error = vn_lock(invp, LK_SHARED | LK_NOWAIT);
3807 vn_finished_write(mp);
3809 error = vn_lock(invp, LK_SHARED);
3815 vn_finished_write(mp);
3816 } while (error == 0);
3821 * Do the vn_rlimit_fsize() check. Should this be above the VOP layer?
3823 io.uio_offset = *ap->a_outoffp;
3824 io.uio_resid = *ap->a_lenp;
3825 error = vn_rlimit_fsize(outvp, &io, ap->a_fsizetd);
3828 * Flush the input file so that the data is up to date before
3829 * the copy. Flush writes for the output file so that they
3830 * do not overwrite the data copied to the output file by the Copy.
3831 * Set the commit argument for both flushes so that the data is on
3832 * stable storage before the Copy RPC. This is done in case the
3833 * server reboots during the Copy and needs to be redone.
3836 error = ncl_flush(invp, MNT_WAIT, curthread, 1, 0);
3838 error = ncl_flush(outvp, MNT_WAIT, curthread, 1, 0);
3840 /* Do the actual NFSv4.2 RPC. */
3842 mtx_lock(&nmp->nm_mtx);
3843 if ((nmp->nm_privflag & NFSMNTP_NOCONSECUTIVE) == 0)
3846 consecutive = false;
3847 mtx_unlock(&nmp->nm_mtx);
3848 inoff = *ap->a_inoffp;
3849 outoff = *ap->a_outoffp;
3851 must_commit = false;
3853 vap = &VTONFS(invp)->n_vattr.na_vattr;
3854 error = VOP_GETATTR(invp, vap, ap->a_incred);
3857 * Clip "len" at va_size so that RFC compliant servers
3858 * will not reply NFSERR_INVAL.
3859 * Setting "len == 0" for the RPC would be preferred,
3860 * but some Linux servers do not support that.
3862 if (inoff >= vap->va_size)
3863 *ap->a_lenp = len = 0;
3864 else if (inoff + len > vap->va_size)
3865 *ap->a_lenp = len = vap->va_size - inoff;
3871 * len will be set to 0 upon a successful Copy RPC.
3872 * As such, this only loops when the Copy RPC needs to be retried.
3874 while (len > 0 && error == 0) {
3875 inattrflag = outattrflag = 0;
3878 error = nfsrpc_copy_file_range(invp, ap->a_inoffp,
3879 outvp, ap->a_outoffp, &len2, ap->a_flags,
3880 &inattrflag, &innfsva, &outattrflag, &outnfsva,
3881 ap->a_outcred, consecutive, &must_commit);
3883 error = nfsrpc_copy_file_range(invp, ap->a_inoffp,
3884 outvp, ap->a_outoffp, &len2, ap->a_flags,
3885 &inattrflag, &innfsva, &outattrflag, &outnfsva,
3886 ap->a_incred, consecutive, &must_commit);
3887 if (inattrflag != 0)
3888 ret = nfscl_loadattrcache(&invp, &innfsva, NULL, NULL,
3890 if (outattrflag != 0)
3891 ret2 = nfscl_loadattrcache(&outvp, &outnfsva, NULL,
3894 if (consecutive == false) {
3896 mtx_lock(&nmp->nm_mtx);
3898 NFSMNTP_NOCONSECUTIVE;
3899 mtx_unlock(&nmp->nm_mtx);
3901 error = NFSERR_OFFLOADNOREQS;
3905 if (len2 > 0 && must_commit && error == 0)
3906 error = ncl_commit(outvp, outoff, *ap->a_lenp,
3907 ap->a_outcred, curthread);
3908 if (error == 0 && ret != 0)
3910 if (error == 0 && ret2 != 0)
3912 } else if (error == NFSERR_OFFLOADNOREQS && consecutive) {
3914 * Try consecutive == false, which is ok only if all
3916 * If only some bytes were copied when consecutive
3917 * is false, there is no way to know which bytes
3918 * still need to be written.
3920 consecutive = false;
3922 } else if (error == NFSERR_ACCES && tryoutcred) {
3923 /* Try again with incred. */
3927 if (error == NFSERR_STALEWRITEVERF) {
3929 * Server rebooted, so do it all again.
3931 *ap->a_inoffp = inoff;
3932 *ap->a_outoffp = outoff;
3934 must_commit = false;
3941 vn_finished_write(mp);
3942 if (error == NFSERR_NOTSUPP || error == NFSERR_OFFLOADNOREQS ||
3943 error == NFSERR_ACCES) {
3945 * Unlike the NFSv4.2 Copy, vn_generic_copy_file_range() can
3946 * use a_incred for the read and a_outcred for the write, so
3947 * try this for NFSERR_ACCES failures for the Copy.
3948 * For NFSERR_NOTSUPP and NFSERR_OFFLOADNOREQS, the Copy can
3949 * never succeed, so disable it.
3951 if (error != NFSERR_ACCES) {
3952 /* Can never do Copy on this mount. */
3953 mtx_lock(&nmp->nm_mtx);
3954 nmp->nm_privflag |= NFSMNTP_NOCOPY;
3955 mtx_unlock(&nmp->nm_mtx);
3957 *ap->a_inoffp = inoff;
3958 *ap->a_outoffp = outoff;
3959 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp,
3960 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags,
3961 ap->a_incred, ap->a_outcred, ap->a_fsizetd);
3962 } else if (error != 0)
3966 error = nfscl_maperr(curthread, error, (uid_t)0, (gid_t)0);
3974 nfs_ioctl(struct vop_ioctl_args *ap)
3976 struct vnode *vp = ap->a_vp;
3977 struct nfsvattr nfsva;
3978 struct nfsmount *nmp;
3979 int attrflag, content, error, ret;
3980 bool eof = false; /* shut up compiler. */
3982 if (vp->v_type != VREG)
3984 nmp = VFSTONFS(vp->v_mount);
3985 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION) {
3986 error = vop_stdioctl(ap);
3990 /* Do the actual NFSv4.2 RPC. */
3991 switch (ap->a_command) {
3993 content = NFSV4CONTENT_DATA;
3996 content = NFSV4CONTENT_HOLE;
4002 error = vn_lock(vp, LK_SHARED);
4006 if (*((off_t *)ap->a_data) >= VTONFS(vp)->n_size)
4010 * Flush all writes, so that the server is up to date.
4011 * Although a Commit is not required, the commit argument
4012 * is set so that, for a pNFS File/Flexible File Layout
4013 * server, the LayoutCommit will be done to ensure the file
4014 * size is up to date on the Metadata Server.
4016 error = ncl_flush(vp, MNT_WAIT, ap->a_td, 1, 0);
4018 error = nfsrpc_seek(vp, (off_t *)ap->a_data, &eof,
4019 content, ap->a_cred, &nfsva, &attrflag);
4020 /* If at eof for FIOSEEKDATA, return ENXIO. */
4021 if (eof && error == 0 && content == NFSV4CONTENT_DATA)
4024 if (attrflag != 0) {
4025 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
4026 if (error == 0 && ret != 0)
4037 * nfs getextattr call
4040 nfs_getextattr(struct vop_getextattr_args *ap)
4042 struct vnode *vp = ap->a_vp;
4043 struct nfsmount *nmp;
4045 struct thread *td = ap->a_td;
4046 struct nfsvattr nfsva;
4048 int attrflag, error, ret;
4050 nmp = VFSTONFS(vp->v_mount);
4051 mtx_lock(&nmp->nm_mtx);
4052 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
4053 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
4054 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
4055 mtx_unlock(&nmp->nm_mtx);
4056 return (EOPNOTSUPP);
4058 mtx_unlock(&nmp->nm_mtx);
4062 cred = td->td_ucred;
4063 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */
4065 error = nfsrpc_getextattr(vp, ap->a_name, ap->a_uio, &len, &nfsva,
4066 &attrflag, cred, td);
4067 if (attrflag != 0) {
4068 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
4069 if (error == 0 && ret != 0)
4072 if (error == 0 && ap->a_size != NULL)
4076 case NFSERR_NOTSUPP:
4077 case NFSERR_OPILLEGAL:
4078 mtx_lock(&nmp->nm_mtx);
4079 nmp->nm_privflag |= NFSMNTP_NOXATTR;
4080 mtx_unlock(&nmp->nm_mtx);
4083 case NFSERR_NOXATTR:
4084 case NFSERR_XATTR2BIG:
4088 error = nfscl_maperr(td, error, 0, 0);
4095 * nfs setextattr call
4098 nfs_setextattr(struct vop_setextattr_args *ap)
4100 struct vnode *vp = ap->a_vp;
4101 struct nfsmount *nmp;
4103 struct thread *td = ap->a_td;
4104 struct nfsvattr nfsva;
4105 int attrflag, error, ret;
4107 nmp = VFSTONFS(vp->v_mount);
4108 mtx_lock(&nmp->nm_mtx);
4109 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
4110 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
4111 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
4112 mtx_unlock(&nmp->nm_mtx);
4113 return (EOPNOTSUPP);
4115 mtx_unlock(&nmp->nm_mtx);
4117 if (ap->a_uio->uio_resid < 0)
4121 cred = td->td_ucred;
4122 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */
4124 error = nfsrpc_setextattr(vp, ap->a_name, ap->a_uio, &nfsva,
4125 &attrflag, cred, td);
4126 if (attrflag != 0) {
4127 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
4128 if (error == 0 && ret != 0)
4133 case NFSERR_NOTSUPP:
4134 case NFSERR_OPILLEGAL:
4135 mtx_lock(&nmp->nm_mtx);
4136 nmp->nm_privflag |= NFSMNTP_NOXATTR;
4137 mtx_unlock(&nmp->nm_mtx);
4140 case NFSERR_NOXATTR:
4141 case NFSERR_XATTR2BIG:
4145 error = nfscl_maperr(td, error, 0, 0);
4152 * nfs listextattr call
4155 nfs_listextattr(struct vop_listextattr_args *ap)
4157 struct vnode *vp = ap->a_vp;
4158 struct nfsmount *nmp;
4160 struct thread *td = ap->a_td;
4161 struct nfsvattr nfsva;
4164 int attrflag, error, ret;
4167 nmp = VFSTONFS(vp->v_mount);
4168 mtx_lock(&nmp->nm_mtx);
4169 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
4170 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
4171 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
4172 mtx_unlock(&nmp->nm_mtx);
4173 return (EOPNOTSUPP);
4175 mtx_unlock(&nmp->nm_mtx);
4179 cred = td->td_ucred;
4181 /* Loop around doing List Extended Attribute RPCs. */
4186 while (!eof && error == 0) {
4187 len = nmp->nm_rsize;
4189 error = nfsrpc_listextattr(vp, &cookie, ap->a_uio, &len, &eof,
4190 &nfsva, &attrflag, cred, td);
4191 if (attrflag != 0) {
4192 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
4194 if (error == 0 && ret != 0)
4199 if (len2 > SSIZE_MAX)
4203 if (error == 0 && ap->a_size != NULL)
4207 case NFSERR_NOTSUPP:
4208 case NFSERR_OPILLEGAL:
4209 mtx_lock(&nmp->nm_mtx);
4210 nmp->nm_privflag |= NFSMNTP_NOXATTR;
4211 mtx_unlock(&nmp->nm_mtx);
4214 case NFSERR_NOXATTR:
4215 case NFSERR_XATTR2BIG:
4219 error = nfscl_maperr(td, error, 0, 0);
4226 * nfs setextattr call
4229 nfs_deleteextattr(struct vop_deleteextattr_args *ap)
4231 struct vnode *vp = ap->a_vp;
4232 struct nfsmount *nmp;
4233 struct nfsvattr nfsva;
4234 int attrflag, error, ret;
4236 nmp = VFSTONFS(vp->v_mount);
4237 mtx_lock(&nmp->nm_mtx);
4238 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
4239 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
4240 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
4241 mtx_unlock(&nmp->nm_mtx);
4242 return (EOPNOTSUPP);
4244 mtx_unlock(&nmp->nm_mtx);
4246 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */
4248 error = nfsrpc_rmextattr(vp, ap->a_name, &nfsva, &attrflag, ap->a_cred,
4250 if (attrflag != 0) {
4251 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
4252 if (error == 0 && ret != 0)
4257 case NFSERR_NOTSUPP:
4258 case NFSERR_OPILLEGAL:
4259 mtx_lock(&nmp->nm_mtx);
4260 nmp->nm_privflag |= NFSMNTP_NOXATTR;
4261 mtx_unlock(&nmp->nm_mtx);
4264 case NFSERR_NOXATTR:
4265 case NFSERR_XATTR2BIG:
4269 error = nfscl_maperr(ap->a_td, error, 0, 0);
4276 * Return POSIX pathconf information applicable to nfs filesystems.
4279 nfs_pathconf(struct vop_pathconf_args *ap)
4281 struct nfsv3_pathconf pc;
4282 struct nfsvattr nfsva;
4283 struct vnode *vp = ap->a_vp;
4284 struct nfsmount *nmp;
4285 struct thread *td = curthread;
4288 int attrflag, error;
4290 if ((NFS_ISV34(vp) && (ap->a_name == _PC_LINK_MAX ||
4291 ap->a_name == _PC_NAME_MAX || ap->a_name == _PC_CHOWN_RESTRICTED ||
4292 ap->a_name == _PC_NO_TRUNC)) ||
4293 (NFS_ISV4(vp) && ap->a_name == _PC_ACL_NFS4)) {
4295 * Since only the above 4 a_names are returned by the NFSv3
4296 * Pathconf RPC, there is no point in doing it for others.
4297 * For NFSv4, the Pathconf RPC (actually a Getattr Op.) can
4298 * be used for _PC_NFS4_ACL as well.
4300 error = nfsrpc_pathconf(vp, &pc, td->td_ucred, td, &nfsva,
4303 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
4309 * For NFSv2 (or NFSv3 when not one of the above 4 a_names),
4312 pc.pc_linkmax = NFS_LINK_MAX;
4313 pc.pc_namemax = NFS_MAXNAMLEN;
4315 pc.pc_chownrestricted = 1;
4316 pc.pc_caseinsensitive = 0;
4317 pc.pc_casepreserving = 1;
4320 switch (ap->a_name) {
4323 *ap->a_retval = pc.pc_linkmax;
4325 *ap->a_retval = MIN(LONG_MAX, pc.pc_linkmax);
4329 *ap->a_retval = pc.pc_namemax;
4332 if (ap->a_vp->v_type == VDIR || ap->a_vp->v_type == VFIFO)
4333 *ap->a_retval = PIPE_BUF;
4337 case _PC_CHOWN_RESTRICTED:
4338 *ap->a_retval = pc.pc_chownrestricted;
4341 *ap->a_retval = pc.pc_notrunc;
4344 if (NFS_ISV4(vp) && nfsrv_useacl != 0 && attrflag != 0 &&
4345 NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL))
4350 case _PC_ACL_PATH_MAX:
4352 *ap->a_retval = ACL_MAX_ENTRIES;
4362 case _PC_ALLOC_SIZE_MIN:
4363 *ap->a_retval = vp->v_mount->mnt_stat.f_bsize;
4365 case _PC_FILESIZEBITS:
4371 case _PC_REC_INCR_XFER_SIZE:
4372 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
4374 case _PC_REC_MAX_XFER_SIZE:
4375 *ap->a_retval = -1; /* means ``unlimited'' */
4377 case _PC_REC_MIN_XFER_SIZE:
4378 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
4380 case _PC_REC_XFER_ALIGN:
4381 *ap->a_retval = PAGE_SIZE;
4383 case _PC_SYMLINK_MAX:
4384 *ap->a_retval = NFS_MAXPATHLEN;
4386 case _PC_MIN_HOLE_SIZE:
4387 /* Only some NFSv4.2 servers support Seek for Holes. */
4389 nmp = VFSTONFS(vp->v_mount);
4390 if (NFS_ISV4(vp) && nmp->nm_minorvers == NFSV42_MINORVERSION) {
4392 * NFSv4.2 doesn't have an attribute for hole size,
4393 * so all we can do is see if the Seek operation is
4394 * supported and then use f_iosize as a "best guess".
4396 mtx_lock(&nmp->nm_mtx);
4397 if ((nmp->nm_privflag & NFSMNTP_SEEKTESTED) == 0) {
4398 mtx_unlock(&nmp->nm_mtx);
4401 error = nfsrpc_seek(vp, &off, &eof,
4402 NFSV4CONTENT_HOLE, td->td_ucred, &nfsva,
4405 nfscl_loadattrcache(&vp, &nfsva,
4407 mtx_lock(&nmp->nm_mtx);
4408 if (error == NFSERR_NOTSUPP)
4409 nmp->nm_privflag |= NFSMNTP_SEEKTESTED;
4411 nmp->nm_privflag |= NFSMNTP_SEEKTESTED |
4415 if ((nmp->nm_privflag & NFSMNTP_SEEK) != 0)
4416 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
4417 mtx_unlock(&nmp->nm_mtx);
4422 error = vop_stdpathconf(ap);