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_copy_file_range_t nfs_copy_file_range;
150 static vop_ioctl_t nfs_ioctl;
151 static vop_getextattr_t nfs_getextattr;
152 static vop_setextattr_t nfs_setextattr;
153 static vop_listextattr_t nfs_listextattr;
154 static vop_deleteextattr_t nfs_deleteextattr;
155 static vop_lock1_t nfs_lock;
158 * Global vfs data structures for nfs
161 static struct vop_vector newnfs_vnodeops_nosig = {
162 .vop_default = &default_vnodeops,
163 .vop_access = nfs_access,
164 .vop_advlock = nfs_advlock,
165 .vop_advlockasync = nfs_advlockasync,
166 .vop_close = nfs_close,
167 .vop_create = nfs_create,
168 .vop_fsync = nfs_fsync,
169 .vop_getattr = nfs_getattr,
170 .vop_getpages = ncl_getpages,
171 .vop_putpages = ncl_putpages,
172 .vop_inactive = ncl_inactive,
173 .vop_link = nfs_link,
174 .vop_lock1 = nfs_lock,
175 .vop_lookup = nfs_lookup,
176 .vop_mkdir = nfs_mkdir,
177 .vop_mknod = nfs_mknod,
178 .vop_open = nfs_open,
179 .vop_pathconf = nfs_pathconf,
180 .vop_print = nfs_print,
181 .vop_read = nfs_read,
182 .vop_readdir = nfs_readdir,
183 .vop_readlink = nfs_readlink,
184 .vop_reclaim = ncl_reclaim,
185 .vop_remove = nfs_remove,
186 .vop_rename = nfs_rename,
187 .vop_rmdir = nfs_rmdir,
188 .vop_setattr = nfs_setattr,
189 .vop_strategy = nfs_strategy,
190 .vop_symlink = nfs_symlink,
191 .vop_write = ncl_write,
192 .vop_getacl = nfs_getacl,
193 .vop_setacl = nfs_setacl,
194 .vop_advise = nfs_advise,
195 .vop_allocate = nfs_allocate,
196 .vop_copy_file_range = nfs_copy_file_range,
197 .vop_ioctl = nfs_ioctl,
198 .vop_getextattr = nfs_getextattr,
199 .vop_setextattr = nfs_setextattr,
200 .vop_listextattr = nfs_listextattr,
201 .vop_deleteextattr = nfs_deleteextattr,
203 VFS_VOP_VECTOR_REGISTER(newnfs_vnodeops_nosig);
206 nfs_vnodeops_bypass(struct vop_generic_args *a)
209 return (vop_sigdefer(&newnfs_vnodeops_nosig, a));
212 struct vop_vector newnfs_vnodeops = {
213 .vop_default = &default_vnodeops,
214 .vop_bypass = nfs_vnodeops_bypass,
216 VFS_VOP_VECTOR_REGISTER(newnfs_vnodeops);
218 static struct vop_vector newnfs_fifoops_nosig = {
219 .vop_default = &fifo_specops,
220 .vop_access = nfsspec_access,
221 .vop_close = nfsfifo_close,
222 .vop_fsync = nfs_fsync,
223 .vop_getattr = nfs_getattr,
224 .vop_inactive = ncl_inactive,
225 .vop_pathconf = nfs_pathconf,
226 .vop_print = nfs_print,
227 .vop_read = nfsfifo_read,
228 .vop_reclaim = ncl_reclaim,
229 .vop_setattr = nfs_setattr,
230 .vop_write = nfsfifo_write,
232 VFS_VOP_VECTOR_REGISTER(newnfs_fifoops_nosig);
235 nfs_fifoops_bypass(struct vop_generic_args *a)
238 return (vop_sigdefer(&newnfs_fifoops_nosig, a));
241 struct vop_vector newnfs_fifoops = {
242 .vop_default = &default_vnodeops,
243 .vop_bypass = nfs_fifoops_bypass,
245 VFS_VOP_VECTOR_REGISTER(newnfs_fifoops);
247 static int nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp,
248 struct componentname *cnp, struct vattr *vap);
249 static int nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
250 int namelen, struct ucred *cred, struct thread *td);
251 static int nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp,
252 char *fnameptr, int fnamelen, struct vnode *tdvp, struct vnode *tvp,
253 char *tnameptr, int tnamelen, struct ucred *cred, struct thread *td);
254 static int nfs_renameit(struct vnode *sdvp, struct vnode *svp,
255 struct componentname *scnp, struct sillyrename *sp);
260 SYSCTL_DECL(_vfs_nfs);
262 static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
263 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
264 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
266 static int nfs_prime_access_cache = 0;
267 SYSCTL_INT(_vfs_nfs, OID_AUTO, prime_access_cache, CTLFLAG_RW,
268 &nfs_prime_access_cache, 0,
269 "Prime NFS ACCESS cache when fetching attributes");
271 static int newnfs_commit_on_close = 0;
272 SYSCTL_INT(_vfs_nfs, OID_AUTO, commit_on_close, CTLFLAG_RW,
273 &newnfs_commit_on_close, 0, "write+commit on close, else only write");
275 static int nfs_clean_pages_on_close = 1;
276 SYSCTL_INT(_vfs_nfs, OID_AUTO, clean_pages_on_close, CTLFLAG_RW,
277 &nfs_clean_pages_on_close, 0, "NFS clean dirty pages on close");
279 int newnfs_directio_enable = 0;
280 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_enable, CTLFLAG_RW,
281 &newnfs_directio_enable, 0, "Enable NFS directio");
283 int nfs_keep_dirty_on_error;
284 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_keep_dirty_on_error, CTLFLAG_RW,
285 &nfs_keep_dirty_on_error, 0, "Retry pageout if error returned");
288 * This sysctl allows other processes to mmap a file that has been opened
289 * O_DIRECT by a process. In general, having processes mmap the file while
290 * Direct IO is in progress can lead to Data Inconsistencies. But, we allow
291 * this by default to prevent DoS attacks - to prevent a malicious user from
292 * opening up files O_DIRECT preventing other users from mmap'ing these
293 * files. "Protected" environments where stricter consistency guarantees are
294 * required can disable this knob. The process that opened the file O_DIRECT
295 * cannot mmap() the file, because mmap'ed IO on an O_DIRECT open() is not
298 int newnfs_directio_allow_mmap = 1;
299 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_allow_mmap, CTLFLAG_RW,
300 &newnfs_directio_allow_mmap, 0, "Enable mmaped IO on file with O_DIRECT opens");
302 #define NFSACCESS_ALL (NFSACCESS_READ | NFSACCESS_MODIFY \
303 | NFSACCESS_EXTEND | NFSACCESS_EXECUTE \
304 | NFSACCESS_DELETE | NFSACCESS_LOOKUP)
308 * The list of locks after the description of the lock is the ordering
309 * of other locks acquired with the lock held.
310 * np->n_mtx : Protects the fields in the nfsnode.
312 VI_MTX (acquired indirectly)
313 * nmp->nm_mtx : Protects the fields in the nfsmount.
315 * ncl_iod_mutex : Global lock, protects shared nfsiod state.
316 * nfs_reqq_mtx : Global lock, protects the nfs_reqq list.
319 * rep->r_mtx : Protects the fields in an nfsreq.
323 nfs_lock(struct vop_lock1_args *ap)
332 lktype = ap->a_flags & LK_TYPE_MASK;
333 error = VOP_LOCK1_APV(&default_vnodeops, ap);
334 if (error != 0 || vp->v_op != &newnfs_vnodeops)
340 if ((np->n_flag & NVNSETSZSKIP) == 0 || (lktype != LK_SHARED &&
341 lktype != LK_EXCLUSIVE && lktype != LK_UPGRADE &&
342 lktype != LK_TRYUPGRADE)) {
346 onfault = (ap->a_flags & LK_EATTR_MASK) == LK_NOWAIT &&
347 (ap->a_flags & LK_INIT_MASK) == LK_CANRECURSE &&
348 (lktype == LK_SHARED || lktype == LK_EXCLUSIVE);
349 if (onfault && vp->v_vnlock->lk_recurse == 0) {
351 * Force retry in vm_fault(), to make the lock request
352 * sleepable, which allows us to piggy-back the
353 * sleepable call to vnode_pager_setsize().
359 if ((ap->a_flags & LK_NOWAIT) != 0 ||
360 (lktype == LK_SHARED && vp->v_vnlock->lk_recurse > 0)) {
364 if (lktype == LK_SHARED) {
367 ap->a_flags &= ~(LK_TYPE_MASK | LK_INTERLOCK);
368 ap->a_flags |= LK_EXCLUSIVE;
369 error = VOP_LOCK1_APV(&default_vnodeops, ap);
370 if (error != 0 || vp->v_op != &newnfs_vnodeops)
372 if (vp->v_data == NULL)
374 MPASS(vp->v_data == np);
376 if ((np->n_flag & NVNSETSZSKIP) == 0) {
381 np->n_flag &= ~NVNSETSZSKIP;
384 vnode_pager_setsize(vp, nsize);
386 if (lktype == LK_SHARED) {
387 ap->a_flags &= ~(LK_TYPE_MASK | LK_INTERLOCK);
388 ap->a_flags |= LK_DOWNGRADE;
389 (void)VOP_LOCK1_APV(&default_vnodeops, ap);
395 nfs34_access_otw(struct vnode *vp, int wmode, struct thread *td,
396 struct ucred *cred, u_int32_t *retmode)
398 int error = 0, attrflag, i, lrupos;
400 struct nfsnode *np = VTONFS(vp);
401 struct nfsvattr nfsva;
403 error = nfsrpc_accessrpc(vp, wmode, cred, td, &nfsva, &attrflag,
406 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
410 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
411 if (np->n_accesscache[i].uid == cred->cr_uid) {
412 np->n_accesscache[i].mode = rmode;
413 np->n_accesscache[i].stamp = time_second;
416 if (i > 0 && np->n_accesscache[i].stamp <
417 np->n_accesscache[lrupos].stamp)
420 if (i == NFS_ACCESSCACHESIZE) {
421 np->n_accesscache[lrupos].uid = cred->cr_uid;
422 np->n_accesscache[lrupos].mode = rmode;
423 np->n_accesscache[lrupos].stamp = time_second;
428 KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, rmode, 0);
429 } else if (NFS_ISV4(vp)) {
430 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
434 KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, 0,
441 * nfs access vnode op.
442 * For nfs version 2, just return ok. File accesses may fail later.
443 * For nfs version 3, use the access rpc to check accessibility. If file modes
444 * are changed on the server, accesses might still fail later.
447 nfs_access(struct vop_access_args *ap)
449 struct vnode *vp = ap->a_vp;
450 int error = 0, i, gotahit;
451 u_int32_t mode, wmode, rmode;
452 int v34 = NFS_ISV34(vp);
453 struct nfsnode *np = VTONFS(vp);
456 * Disallow write attempts on filesystems mounted read-only;
457 * unless the file is a socket, fifo, or a block or character
458 * device resident on the filesystem.
460 if ((ap->a_accmode & (VWRITE | VAPPEND | VWRITE_NAMED_ATTRS |
461 VDELETE_CHILD | VWRITE_ATTRIBUTES | VDELETE | VWRITE_ACL |
462 VWRITE_OWNER)) != 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0) {
463 switch (vp->v_type) {
473 * For nfs v3 or v4, check to see if we have done this recently, and if
474 * so return our cached result instead of making an ACCESS call.
475 * If not, do an access rpc, otherwise you are stuck emulating
476 * ufs_access() locally using the vattr. This may not be correct,
477 * since the server may apply other access criteria such as
478 * client uid-->server uid mapping that we do not know about.
481 if (ap->a_accmode & VREAD)
482 mode = NFSACCESS_READ;
485 if (vp->v_type != VDIR) {
486 if (ap->a_accmode & VWRITE)
487 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
488 if (ap->a_accmode & VAPPEND)
489 mode |= NFSACCESS_EXTEND;
490 if (ap->a_accmode & VEXEC)
491 mode |= NFSACCESS_EXECUTE;
492 if (ap->a_accmode & VDELETE)
493 mode |= NFSACCESS_DELETE;
495 if (ap->a_accmode & VWRITE)
496 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
497 if (ap->a_accmode & VAPPEND)
498 mode |= NFSACCESS_EXTEND;
499 if (ap->a_accmode & VEXEC)
500 mode |= NFSACCESS_LOOKUP;
501 if (ap->a_accmode & VDELETE)
502 mode |= NFSACCESS_DELETE;
503 if (ap->a_accmode & VDELETE_CHILD)
504 mode |= NFSACCESS_MODIFY;
506 /* XXX safety belt, only make blanket request if caching */
507 if (nfsaccess_cache_timeout > 0) {
508 wmode = NFSACCESS_READ | NFSACCESS_MODIFY |
509 NFSACCESS_EXTEND | NFSACCESS_EXECUTE |
510 NFSACCESS_DELETE | NFSACCESS_LOOKUP;
516 * Does our cached result allow us to give a definite yes to
521 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
522 if (ap->a_cred->cr_uid == np->n_accesscache[i].uid) {
523 if (time_second < (np->n_accesscache[i].stamp
524 + nfsaccess_cache_timeout) &&
525 (np->n_accesscache[i].mode & mode) == mode) {
526 NFSINCRGLOBAL(nfsstatsv1.accesscache_hits);
535 KDTRACE_NFS_ACCESSCACHE_GET_HIT(vp,
536 ap->a_cred->cr_uid, mode);
538 KDTRACE_NFS_ACCESSCACHE_GET_MISS(vp,
539 ap->a_cred->cr_uid, mode);
543 * Either a no, or a don't know. Go to the wire.
545 NFSINCRGLOBAL(nfsstatsv1.accesscache_misses);
546 error = nfs34_access_otw(vp, wmode, ap->a_td,
549 (rmode & mode) != mode)
554 if ((error = nfsspec_access(ap)) != 0) {
558 * Attempt to prevent a mapped root from accessing a file
559 * which it shouldn't. We try to read a byte from the file
560 * if the user is root and the file is not zero length.
561 * After calling nfsspec_access, we should have the correct
565 if (ap->a_cred->cr_uid == 0 && (ap->a_accmode & VREAD)
566 && VTONFS(vp)->n_size > 0) {
574 auio.uio_iov = &aiov;
578 auio.uio_segflg = UIO_SYSSPACE;
579 auio.uio_rw = UIO_READ;
580 auio.uio_td = ap->a_td;
582 if (vp->v_type == VREG)
583 error = ncl_readrpc(vp, &auio, ap->a_cred);
584 else if (vp->v_type == VDIR) {
586 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
588 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
589 error = ncl_readdirrpc(vp, &auio, ap->a_cred,
592 } else if (vp->v_type == VLNK)
593 error = ncl_readlinkrpc(vp, &auio, ap->a_cred);
604 * Check to see if the type is ok
605 * and that deletion is not in progress.
606 * For paged in text files, you will need to flush the page cache
607 * if consistency is lost.
611 nfs_open(struct vop_open_args *ap)
613 struct vnode *vp = ap->a_vp;
614 struct nfsnode *np = VTONFS(vp);
617 int fmode = ap->a_mode;
621 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK)
625 * For NFSv4, we need to do the Open Op before cache validation,
626 * so that we conform to RFC3530 Sec. 9.3.1.
629 error = nfsrpc_open(vp, fmode, ap->a_cred, ap->a_td);
631 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
638 * Now, if this Open will be doing reading, re-validate/flush the
639 * cache, so that Close/Open coherency is maintained.
642 if (np->n_flag & NMODIFIED) {
644 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
645 if (error == EINTR || error == EIO) {
647 (void) nfsrpc_close(vp, 0, ap->a_td);
652 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
653 if (vp->v_type == VDIR)
654 np->n_direofoffset = 0;
656 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
659 (void) nfsrpc_close(vp, 0, ap->a_td);
663 np->n_mtime = vattr.va_mtime;
665 np->n_change = vattr.va_filerev;
668 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
671 (void) nfsrpc_close(vp, 0, ap->a_td);
675 if ((NFS_ISV4(vp) && np->n_change != vattr.va_filerev) ||
676 NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
677 if (vp->v_type == VDIR)
678 np->n_direofoffset = 0;
680 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
681 if (error == EINTR || error == EIO) {
683 (void) nfsrpc_close(vp, 0, ap->a_td);
687 np->n_mtime = vattr.va_mtime;
689 np->n_change = vattr.va_filerev;
694 * If the object has >= 1 O_DIRECT active opens, we disable caching.
696 if (newnfs_directio_enable && (fmode & O_DIRECT) &&
697 (vp->v_type == VREG)) {
698 if (np->n_directio_opens == 0) {
700 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
703 (void) nfsrpc_close(vp, 0, ap->a_td);
707 np->n_flag |= NNONCACHE;
709 np->n_directio_opens++;
712 /* If opened for writing via NFSv4.1 or later, mark that for pNFS. */
713 if (NFSHASPNFS(VFSTONFS(vp->v_mount)) && (fmode & FWRITE) != 0)
714 np->n_flag |= NWRITEOPENED;
717 * If this is an open for writing, capture a reference to the
718 * credentials, so they can be used by ncl_putpages(). Using
719 * these write credentials is preferable to the credentials of
720 * whatever thread happens to be doing the VOP_PUTPAGES() since
721 * the write RPCs are less likely to fail with EACCES.
723 if ((fmode & FWRITE) != 0) {
724 cred = np->n_writecred;
725 np->n_writecred = crhold(ap->a_cred);
732 vnode_create_vobject(vp, vattr.va_size, ap->a_td);
735 * If the text file has been mmap'd, flush any dirty pages to the
736 * buffer cache and then...
737 * Make sure all writes are pushed to the NFS server. If this is not
738 * done, the modify time of the file can change while the text
739 * file is being executed. This will cause the process that is
740 * executing the text file to be terminated.
742 if (vp->v_writecount <= -1) {
743 if ((obj = vp->v_object) != NULL &&
744 vm_object_mightbedirty(obj)) {
745 VM_OBJECT_WLOCK(obj);
746 vm_object_page_clean(obj, 0, 0, OBJPC_SYNC);
747 VM_OBJECT_WUNLOCK(obj);
750 /* Now, flush the buffer cache. */
751 ncl_flush(vp, MNT_WAIT, curthread, 0, 0);
753 /* And, finally, make sure that n_mtime is up to date. */
756 np->n_mtime = np->n_vattr.na_mtime;
764 * What an NFS client should do upon close after writing is a debatable issue.
765 * Most NFS clients push delayed writes to the server upon close, basically for
767 * 1 - So that any write errors may be reported back to the client process
768 * doing the close system call. By far the two most likely errors are
769 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
770 * 2 - To put a worst case upper bound on cache inconsistency between
771 * multiple clients for the file.
772 * There is also a consistency problem for Version 2 of the protocol w.r.t.
773 * not being able to tell if other clients are writing a file concurrently,
774 * since there is no way of knowing if the changed modify time in the reply
775 * is only due to the write for this client.
776 * (NFS Version 3 provides weak cache consistency data in the reply that
777 * should be sufficient to detect and handle this case.)
779 * The current code does the following:
780 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
781 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
782 * or commit them (this satisfies 1 and 2 except for the
783 * case where the server crashes after this close but
784 * before the commit RPC, which is felt to be "good
785 * enough". Changing the last argument to ncl_flush() to
786 * a 1 would force a commit operation, if it is felt a
787 * commit is necessary now.
788 * for NFS Version 4 - flush the dirty buffers and commit them, if
789 * nfscl_mustflush() says this is necessary.
790 * It is necessary if there is no write delegation held,
791 * in order to satisfy open/close coherency.
792 * If the file isn't cached on local stable storage,
793 * it may be necessary in order to detect "out of space"
794 * errors from the server, if the write delegation
795 * issued by the server doesn't allow the file to grow.
799 nfs_close(struct vop_close_args *ap)
801 struct vnode *vp = ap->a_vp;
802 struct nfsnode *np = VTONFS(vp);
803 struct nfsvattr nfsva;
805 int error = 0, ret, localcred = 0;
806 int fmode = ap->a_fflag;
808 if (NFSCL_FORCEDISM(vp->v_mount))
811 * During shutdown, a_cred isn't valid, so just use root.
813 if (ap->a_cred == NOCRED) {
814 cred = newnfs_getcred();
819 if (vp->v_type == VREG) {
821 * Examine and clean dirty pages, regardless of NMODIFIED.
822 * This closes a major hole in close-to-open consistency.
823 * We want to push out all dirty pages (and buffers) on
824 * close, regardless of whether they were dirtied by
825 * mmap'ed writes or via write().
827 if (nfs_clean_pages_on_close && vp->v_object) {
828 VM_OBJECT_WLOCK(vp->v_object);
829 vm_object_page_clean(vp->v_object, 0, 0, 0);
830 VM_OBJECT_WUNLOCK(vp->v_object);
833 if (np->n_flag & NMODIFIED) {
837 * Under NFSv3 we have dirty buffers to dispose of. We
838 * must flush them to the NFS server. We have the option
839 * of waiting all the way through the commit rpc or just
840 * waiting for the initial write. The default is to only
841 * wait through the initial write so the data is in the
842 * server's cache, which is roughly similar to the state
843 * a standard disk subsystem leaves the file in on close().
845 * We cannot clear the NMODIFIED bit in np->n_flag due to
846 * potential races with other processes, and certainly
847 * cannot clear it if we don't commit.
848 * These races occur when there is no longer the old
849 * traditional vnode locking implemented for Vnode Ops.
851 int cm = newnfs_commit_on_close ? 1 : 0;
852 error = ncl_flush(vp, MNT_WAIT, ap->a_td, cm, 0);
853 /* np->n_flag &= ~NMODIFIED; */
854 } else if (NFS_ISV4(vp)) {
855 if (nfscl_mustflush(vp) != 0) {
856 int cm = newnfs_commit_on_close ? 1 : 0;
857 error = ncl_flush(vp, MNT_WAIT, ap->a_td,
860 * as above w.r.t races when clearing
862 * np->n_flag &= ~NMODIFIED;
866 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
871 * Invalidate the attribute cache in all cases.
872 * An open is going to fetch fresh attrs any way, other procs
873 * on this node that have file open will be forced to do an
874 * otw attr fetch, but this is safe.
875 * --> A user found that their RPC count dropped by 20% when
876 * this was commented out and I can't see any requirement
877 * for it, so I've disabled it when negative lookups are
878 * enabled. (What does this have to do with negative lookup
879 * caching? Well nothing, except it was reported by the
880 * same user that needed negative lookup caching and I wanted
881 * there to be a way to disable it to see if it
882 * is the cause of some caching/coherency issue that might
885 if (VFSTONFS(vp->v_mount)->nm_negnametimeo == 0) {
887 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
889 if (np->n_flag & NWRITEERR) {
890 np->n_flag &= ~NWRITEERR;
898 * Get attributes so "change" is up to date.
900 if (error == 0 && nfscl_mustflush(vp) != 0 &&
901 vp->v_type == VREG &&
902 (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOCTO) == 0) {
903 ret = nfsrpc_getattr(vp, cred, ap->a_td, &nfsva,
906 np->n_change = nfsva.na_filerev;
907 (void) nfscl_loadattrcache(&vp, &nfsva, NULL,
915 ret = nfsrpc_close(vp, 0, ap->a_td);
919 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
922 if (newnfs_directio_enable)
923 KASSERT((np->n_directio_asyncwr == 0),
924 ("nfs_close: dirty unflushed (%d) directio buffers\n",
925 np->n_directio_asyncwr));
926 if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) {
928 KASSERT((np->n_directio_opens > 0),
929 ("nfs_close: unexpectedly value (0) of n_directio_opens\n"));
930 np->n_directio_opens--;
931 if (np->n_directio_opens == 0)
932 np->n_flag &= ~NNONCACHE;
941 * nfs getattr call from vfs.
944 nfs_getattr(struct vop_getattr_args *ap)
946 struct vnode *vp = ap->a_vp;
947 struct thread *td = curthread; /* XXX */
948 struct nfsnode *np = VTONFS(vp);
950 struct nfsvattr nfsva;
951 struct vattr *vap = ap->a_vap;
955 * Update local times for special files.
958 if (np->n_flag & (NACC | NUPD))
962 * First look in the cache.
964 if (ncl_getattrcache(vp, &vattr) == 0) {
965 vap->va_type = vattr.va_type;
966 vap->va_mode = vattr.va_mode;
967 vap->va_nlink = vattr.va_nlink;
968 vap->va_uid = vattr.va_uid;
969 vap->va_gid = vattr.va_gid;
970 vap->va_fsid = vattr.va_fsid;
971 vap->va_fileid = vattr.va_fileid;
972 vap->va_size = vattr.va_size;
973 vap->va_blocksize = vattr.va_blocksize;
974 vap->va_atime = vattr.va_atime;
975 vap->va_mtime = vattr.va_mtime;
976 vap->va_ctime = vattr.va_ctime;
977 vap->va_gen = vattr.va_gen;
978 vap->va_flags = vattr.va_flags;
979 vap->va_rdev = vattr.va_rdev;
980 vap->va_bytes = vattr.va_bytes;
981 vap->va_filerev = vattr.va_filerev;
983 * Get the local modify time for the case of a write
986 nfscl_deleggetmodtime(vp, &vap->va_mtime);
990 if (NFS_ISV34(vp) && nfs_prime_access_cache &&
991 nfsaccess_cache_timeout > 0) {
992 NFSINCRGLOBAL(nfsstatsv1.accesscache_misses);
993 nfs34_access_otw(vp, NFSACCESS_ALL, td, ap->a_cred, NULL);
994 if (ncl_getattrcache(vp, ap->a_vap) == 0) {
995 nfscl_deleggetmodtime(vp, &ap->a_vap->va_mtime);
999 error = nfsrpc_getattr(vp, ap->a_cred, td, &nfsva, NULL);
1001 error = nfscl_loadattrcache(&vp, &nfsva, vap, NULL, 0, 0);
1004 * Get the local modify time for the case of a write
1007 nfscl_deleggetmodtime(vp, &vap->va_mtime);
1008 } else if (NFS_ISV4(vp)) {
1009 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1018 nfs_setattr(struct vop_setattr_args *ap)
1020 struct vnode *vp = ap->a_vp;
1021 struct nfsnode *np = VTONFS(vp);
1022 struct thread *td = curthread; /* XXX */
1023 struct vattr *vap = ap->a_vap;
1028 tsize = (u_quad_t)0;
1032 * Setting of flags and marking of atimes are not supported.
1034 if (vap->va_flags != VNOVAL)
1035 return (EOPNOTSUPP);
1038 * Disallow write attempts if the filesystem is mounted read-only.
1040 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
1041 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
1042 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
1043 (vp->v_mount->mnt_flag & MNT_RDONLY))
1045 if (vap->va_size != VNOVAL) {
1046 switch (vp->v_type) {
1053 if (vap->va_mtime.tv_sec == VNOVAL &&
1054 vap->va_atime.tv_sec == VNOVAL &&
1055 vap->va_mode == (mode_t)VNOVAL &&
1056 vap->va_uid == (uid_t)VNOVAL &&
1057 vap->va_gid == (gid_t)VNOVAL)
1059 vap->va_size = VNOVAL;
1063 * Disallow write attempts if the filesystem is
1064 * mounted read-only.
1066 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1069 * We run vnode_pager_setsize() early (why?),
1070 * we must set np->n_size now to avoid vinvalbuf
1071 * V_SAVE races that might setsize a lower
1077 error = ncl_meta_setsize(vp, td, vap->va_size);
1079 if (np->n_flag & NMODIFIED) {
1082 error = ncl_vinvalbuf(vp, vap->va_size == 0 ?
1085 vnode_pager_setsize(vp, tsize);
1089 * Call nfscl_delegmodtime() to set the modify time
1090 * locally, as required.
1092 nfscl_delegmodtime(vp);
1096 * np->n_size has already been set to vap->va_size
1097 * in ncl_meta_setsize(). We must set it again since
1098 * nfs_loadattrcache() could be called through
1099 * ncl_meta_setsize() and could modify np->n_size.
1102 np->n_vattr.na_size = np->n_size = vap->va_size;
1107 if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) &&
1108 (np->n_flag & NMODIFIED) && vp->v_type == VREG) {
1110 error = ncl_vinvalbuf(vp, V_SAVE, td, 1);
1111 if (error == EINTR || error == EIO)
1116 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
1117 if (error && vap->va_size != VNOVAL) {
1119 np->n_size = np->n_vattr.na_size = tsize;
1120 vnode_pager_setsize(vp, tsize);
1127 * Do an nfs setattr rpc.
1130 nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred,
1133 struct nfsnode *np = VTONFS(vp);
1134 int error, ret, attrflag, i;
1135 struct nfsvattr nfsva;
1137 if (NFS_ISV34(vp)) {
1139 for (i = 0; i < NFS_ACCESSCACHESIZE; i++)
1140 np->n_accesscache[i].stamp = 0;
1141 np->n_flag |= NDELEGMOD;
1143 KDTRACE_NFS_ACCESSCACHE_FLUSH_DONE(vp);
1145 error = nfsrpc_setattr(vp, vap, NULL, cred, td, &nfsva, &attrflag,
1148 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1152 if (error && NFS_ISV4(vp))
1153 error = nfscl_maperr(td, error, vap->va_uid, vap->va_gid);
1158 * nfs lookup call, one step at a time...
1159 * First look in cache
1160 * If not found, unlock the directory nfsnode and do the rpc
1163 nfs_lookup(struct vop_lookup_args *ap)
1165 struct componentname *cnp = ap->a_cnp;
1166 struct vnode *dvp = ap->a_dvp;
1167 struct vnode **vpp = ap->a_vpp;
1168 struct mount *mp = dvp->v_mount;
1169 int flags = cnp->cn_flags;
1170 struct vnode *newvp;
1171 struct nfsmount *nmp;
1172 struct nfsnode *np, *newnp;
1173 int error = 0, attrflag, dattrflag, ltype, ncticks;
1174 struct thread *td = cnp->cn_thread;
1176 struct nfsvattr dnfsva, nfsva;
1178 struct timespec nctime;
1181 if ((flags & ISLASTCN) && (mp->mnt_flag & MNT_RDONLY) &&
1182 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
1184 if (dvp->v_type != VDIR)
1189 /* For NFSv4, wait until any remove is done. */
1191 while (NFSHASNFSV4(nmp) && (np->n_flag & NREMOVEINPROG)) {
1192 np->n_flag |= NREMOVEWANT;
1193 (void) msleep((caddr_t)np, &np->n_mtx, PZERO, "nfslkup", 0);
1197 error = vn_dir_check_exec(dvp, cnp);
1200 error = cache_lookup(dvp, vpp, cnp, &nctime, &ncticks);
1201 if (error > 0 && error != ENOENT)
1205 * Lookups of "." are special and always return the
1206 * current directory. cache_lookup() already handles
1207 * associated locking bookkeeping, etc.
1209 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
1210 /* XXX: Is this really correct? */
1211 if (cnp->cn_nameiop != LOOKUP &&
1213 cnp->cn_flags |= SAVENAME;
1218 * We only accept a positive hit in the cache if the
1219 * change time of the file matches our cached copy.
1220 * Otherwise, we discard the cache entry and fallback
1221 * to doing a lookup RPC. We also only trust cache
1222 * entries for less than nm_nametimeo seconds.
1224 * To better handle stale file handles and attributes,
1225 * clear the attribute cache of this node if it is a
1226 * leaf component, part of an open() call, and not
1227 * locally modified before fetching the attributes.
1228 * This should allow stale file handles to be detected
1229 * here where we can fall back to a LOOKUP RPC to
1230 * recover rather than having nfs_open() detect the
1231 * stale file handle and failing open(2) with ESTALE.
1234 newnp = VTONFS(newvp);
1235 if (!(nmp->nm_flag & NFSMNT_NOCTO) &&
1236 (flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) &&
1237 !(newnp->n_flag & NMODIFIED)) {
1239 newnp->n_attrstamp = 0;
1240 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp);
1241 NFSUNLOCKNODE(newnp);
1243 if (nfscl_nodeleg(newvp, 0) == 0 ||
1244 ((u_int)(ticks - ncticks) < (nmp->nm_nametimeo * hz) &&
1245 VOP_GETATTR(newvp, &vattr, cnp->cn_cred) == 0 &&
1246 timespeccmp(&vattr.va_ctime, &nctime, ==))) {
1247 NFSINCRGLOBAL(nfsstatsv1.lookupcache_hits);
1248 if (cnp->cn_nameiop != LOOKUP &&
1250 cnp->cn_flags |= SAVENAME;
1259 } else if (error == ENOENT) {
1260 if (VN_IS_DOOMED(dvp))
1263 * We only accept a negative hit in the cache if the
1264 * modification time of the parent directory matches
1265 * the cached copy in the name cache entry.
1266 * Otherwise, we discard all of the negative cache
1267 * entries for this directory. We also only trust
1268 * negative cache entries for up to nm_negnametimeo
1271 if ((u_int)(ticks - ncticks) < (nmp->nm_negnametimeo * hz) &&
1272 VOP_GETATTR(dvp, &vattr, cnp->cn_cred) == 0 &&
1273 timespeccmp(&vattr.va_mtime, &nctime, ==)) {
1274 NFSINCRGLOBAL(nfsstatsv1.lookupcache_hits);
1277 cache_purge_negative(dvp);
1281 NFSINCRGLOBAL(nfsstatsv1.lookupcache_misses);
1282 error = nfsrpc_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1283 cnp->cn_cred, td, &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1286 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1288 if (newvp != NULLVP) {
1293 if (error != ENOENT) {
1295 error = nfscl_maperr(td, error, (uid_t)0,
1300 /* The requested file was not found. */
1301 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
1302 (flags & ISLASTCN)) {
1304 * XXX: UFS does a full VOP_ACCESS(dvp,
1305 * VWRITE) here instead of just checking
1308 if (mp->mnt_flag & MNT_RDONLY)
1310 cnp->cn_flags |= SAVENAME;
1311 return (EJUSTRETURN);
1314 if ((cnp->cn_flags & MAKEENTRY) != 0 && dattrflag) {
1316 * Cache the modification time of the parent
1317 * directory from the post-op attributes in
1318 * the name cache entry. The negative cache
1319 * entry will be ignored once the directory
1320 * has changed. Don't bother adding the entry
1321 * if the directory has already changed.
1324 if (timespeccmp(&np->n_vattr.na_mtime,
1325 &dnfsva.na_mtime, ==)) {
1327 cache_enter_time(dvp, NULL, cnp,
1328 &dnfsva.na_mtime, NULL);
1336 * Handle RENAME case...
1338 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) {
1339 if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
1340 free(nfhp, M_NFSFH);
1343 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL,
1349 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1352 cnp->cn_flags |= SAVENAME;
1356 if (flags & ISDOTDOT) {
1357 ltype = NFSVOPISLOCKED(dvp);
1358 error = vfs_busy(mp, MBF_NOWAIT);
1362 error = vfs_busy(mp, 0);
1363 NFSVOPLOCK(dvp, ltype | LK_RETRY);
1365 if (error == 0 && VN_IS_DOOMED(dvp)) {
1373 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL,
1379 NFSVOPLOCK(dvp, ltype | LK_RETRY);
1380 if (VN_IS_DOOMED(dvp)) {
1392 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1394 } else if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
1395 free(nfhp, M_NFSFH);
1399 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1402 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL,
1408 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1410 else if ((flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) &&
1411 !(np->n_flag & NMODIFIED)) {
1413 * Flush the attribute cache when opening a
1414 * leaf node to ensure that fresh attributes
1415 * are fetched in nfs_open() since we did not
1416 * fetch attributes from the LOOKUP reply.
1419 np->n_attrstamp = 0;
1420 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp);
1424 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
1425 cnp->cn_flags |= SAVENAME;
1426 if ((cnp->cn_flags & MAKEENTRY) && dvp != newvp &&
1427 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN)) &&
1428 attrflag != 0 && (newvp->v_type != VDIR || dattrflag != 0))
1429 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime,
1430 newvp->v_type != VDIR ? NULL : &dnfsva.na_ctime);
1437 * Just call ncl_bioread() to do the work.
1440 nfs_read(struct vop_read_args *ap)
1442 struct vnode *vp = ap->a_vp;
1444 switch (vp->v_type) {
1446 return (ncl_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
1450 return (EOPNOTSUPP);
1458 nfs_readlink(struct vop_readlink_args *ap)
1460 struct vnode *vp = ap->a_vp;
1462 if (vp->v_type != VLNK)
1464 return (ncl_bioread(vp, ap->a_uio, 0, ap->a_cred));
1468 * Do a readlink rpc.
1469 * Called by ncl_doio() from below the buffer cache.
1472 ncl_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1474 int error, ret, attrflag;
1475 struct nfsvattr nfsva;
1477 error = nfsrpc_readlink(vp, uiop, cred, uiop->uio_td, &nfsva,
1480 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1484 if (error && NFS_ISV4(vp))
1485 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1494 ncl_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1496 int error, ret, attrflag;
1497 struct nfsvattr nfsva;
1498 struct nfsmount *nmp;
1500 nmp = VFSTONFS(vp->v_mount);
1503 if (NFSHASPNFS(nmp))
1504 error = nfscl_doiods(vp, uiop, NULL, NULL,
1505 NFSV4OPEN_ACCESSREAD, 0, cred, uiop->uio_td);
1506 NFSCL_DEBUG(4, "readrpc: aft doiods=%d\n", error);
1508 error = nfsrpc_read(vp, uiop, cred, uiop->uio_td, &nfsva,
1511 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1515 if (error && NFS_ISV4(vp))
1516 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1524 ncl_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
1525 int *iomode, int *must_commit, int called_from_strategy)
1527 struct nfsvattr nfsva;
1528 int error, attrflag, ret;
1529 struct nfsmount *nmp;
1531 nmp = VFSTONFS(vp->v_mount);
1534 if (NFSHASPNFS(nmp))
1535 error = nfscl_doiods(vp, uiop, iomode, must_commit,
1536 NFSV4OPEN_ACCESSWRITE, 0, cred, uiop->uio_td);
1537 NFSCL_DEBUG(4, "writerpc: aft doiods=%d\n", error);
1539 error = nfsrpc_write(vp, uiop, iomode, must_commit, cred,
1540 uiop->uio_td, &nfsva, &attrflag, NULL,
1541 called_from_strategy);
1543 if (VTONFS(vp)->n_flag & ND_NFSV4)
1544 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 1,
1547 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
1553 *iomode = NFSWRITE_FILESYNC;
1554 if (error && NFS_ISV4(vp))
1555 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1561 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1562 * mode set to specify the file type and the size field for rdev.
1565 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1568 struct nfsvattr nfsva, dnfsva;
1569 struct vnode *newvp = NULL;
1570 struct nfsnode *np = NULL, *dnp;
1573 int error = 0, attrflag, dattrflag;
1576 if (vap->va_type == VCHR || vap->va_type == VBLK)
1577 rdev = vap->va_rdev;
1578 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1581 return (EOPNOTSUPP);
1582 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1584 error = nfsrpc_mknod(dvp, cnp->cn_nameptr, cnp->cn_namelen, vap,
1585 rdev, vap->va_type, cnp->cn_cred, cnp->cn_thread, &dnfsva,
1586 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
1589 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1590 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1591 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1594 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1595 cnp->cn_thread, &np, NULL, LK_EXCLUSIVE);
1598 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1601 if (attrflag != 0) {
1602 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1610 } else if (NFS_ISV4(dvp)) {
1611 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1616 dnp->n_flag |= NMODIFIED;
1618 dnp->n_attrstamp = 0;
1619 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1627 * just call nfs_mknodrpc() to do the work.
1631 nfs_mknod(struct vop_mknod_args *ap)
1633 return (nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap));
1636 static struct mtx nfs_cverf_mtx;
1637 MTX_SYSINIT(nfs_cverf_mtx, &nfs_cverf_mtx, "NFS create verifier mutex",
1643 static nfsquad_t cverf;
1645 static int cverf_initialized = 0;
1647 mtx_lock(&nfs_cverf_mtx);
1648 if (cverf_initialized == 0) {
1649 cverf.lval[0] = arc4random();
1650 cverf.lval[1] = arc4random();
1651 cverf_initialized = 1;
1655 mtx_unlock(&nfs_cverf_mtx);
1661 * nfs file create call
1664 nfs_create(struct vop_create_args *ap)
1666 struct vnode *dvp = ap->a_dvp;
1667 struct vattr *vap = ap->a_vap;
1668 struct componentname *cnp = ap->a_cnp;
1669 struct nfsnode *np = NULL, *dnp;
1670 struct vnode *newvp = NULL;
1671 struct nfsmount *nmp;
1672 struct nfsvattr dnfsva, nfsva;
1675 int error = 0, attrflag, dattrflag, fmode = 0;
1679 * Oops, not for me..
1681 if (vap->va_type == VSOCK)
1682 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1684 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1686 if (vap->va_vaflags & VA_EXCLUSIVE)
1689 nmp = VFSTONFS(dvp->v_mount);
1691 /* For NFSv4, wait until any remove is done. */
1693 while (NFSHASNFSV4(nmp) && (dnp->n_flag & NREMOVEINPROG)) {
1694 dnp->n_flag |= NREMOVEWANT;
1695 (void) msleep((caddr_t)dnp, &dnp->n_mtx, PZERO, "nfscrt", 0);
1699 cverf = nfs_get_cverf();
1700 error = nfsrpc_create(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1701 vap, cverf, fmode, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva,
1702 &nfhp, &attrflag, &dattrflag, NULL);
1705 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1706 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1707 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1710 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1711 cnp->cn_thread, &np, NULL, LK_EXCLUSIVE);
1714 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1718 error = nfsrpc_getattr(newvp, cnp->cn_cred,
1719 cnp->cn_thread, &nfsva, NULL);
1721 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1725 if (newvp != NULL) {
1729 if (NFS_ISV34(dvp) && (fmode & O_EXCL) &&
1730 error == NFSERR_NOTSUPP) {
1734 } else if (NFS_ISV34(dvp) && (fmode & O_EXCL)) {
1735 if (nfscl_checksattr(vap, &nfsva)) {
1736 error = nfsrpc_setattr(newvp, vap, NULL, cnp->cn_cred,
1737 cnp->cn_thread, &nfsva, &attrflag, NULL);
1738 if (error && (vap->va_uid != (uid_t)VNOVAL ||
1739 vap->va_gid != (gid_t)VNOVAL)) {
1740 /* try again without setting uid/gid */
1741 vap->va_uid = (uid_t)VNOVAL;
1742 vap->va_gid = (uid_t)VNOVAL;
1743 error = nfsrpc_setattr(newvp, vap, NULL,
1744 cnp->cn_cred, cnp->cn_thread, &nfsva,
1748 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
1755 if ((cnp->cn_flags & MAKEENTRY) && attrflag) {
1757 cache_enter_time(dvp, newvp, cnp,
1758 &nfsva.na_ctime, NULL);
1760 printf("nfs_create: bogus NFS server returned "
1761 "the directory as the new file object\n");
1764 } else if (NFS_ISV4(dvp)) {
1765 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1769 dnp->n_flag |= NMODIFIED;
1771 dnp->n_attrstamp = 0;
1772 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1779 * nfs file remove call
1780 * To try and make nfs semantics closer to ufs semantics, a file that has
1781 * other processes using the vnode is renamed instead of removed and then
1782 * removed later on the last close.
1783 * - If v_usecount > 1
1784 * If a rename is not already in the works
1785 * call nfs_sillyrename() to set it up
1790 nfs_remove(struct vop_remove_args *ap)
1792 struct vnode *vp = ap->a_vp;
1793 struct vnode *dvp = ap->a_dvp;
1794 struct componentname *cnp = ap->a_cnp;
1795 struct nfsnode *np = VTONFS(vp);
1799 KASSERT((cnp->cn_flags & HASBUF) != 0, ("nfs_remove: no name"));
1800 KASSERT(vrefcnt(vp) > 0, ("nfs_remove: bad v_usecount"));
1801 if (vp->v_type == VDIR)
1803 else if (vrefcnt(vp) == 1 || (np->n_sillyrename &&
1804 VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 &&
1805 vattr.va_nlink > 1)) {
1807 * Purge the name cache so that the chance of a lookup for
1808 * the name succeeding while the remove is in progress is
1809 * minimized. Without node locking it can still happen, such
1810 * that an I/O op returns ESTALE, but since you get this if
1811 * another host removes the file..
1815 * throw away biocache buffers, mainly to avoid
1816 * unnecessary delayed writes later.
1818 error = ncl_vinvalbuf(vp, 0, cnp->cn_thread, 1);
1819 if (error != EINTR && error != EIO)
1821 error = nfs_removerpc(dvp, vp, cnp->cn_nameptr,
1822 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread);
1824 * Kludge City: If the first reply to the remove rpc is lost..
1825 * the reply to the retransmitted request will be ENOENT
1826 * since the file was in fact removed
1827 * Therefore, we cheat and return success.
1829 if (error == ENOENT)
1831 } else if (!np->n_sillyrename)
1832 error = nfs_sillyrename(dvp, vp, cnp);
1834 np->n_attrstamp = 0;
1836 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
1841 * nfs file remove rpc called from nfs_inactive
1844 ncl_removeit(struct sillyrename *sp, struct vnode *vp)
1847 * Make sure that the directory vnode is still valid.
1848 * XXX we should lock sp->s_dvp here.
1850 if (sp->s_dvp->v_type == VBAD)
1852 return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen,
1857 * Nfs remove rpc, called from nfs_remove() and ncl_removeit().
1860 nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
1861 int namelen, struct ucred *cred, struct thread *td)
1863 struct nfsvattr dnfsva;
1864 struct nfsnode *dnp = VTONFS(dvp);
1865 int error = 0, dattrflag;
1868 dnp->n_flag |= NREMOVEINPROG;
1870 error = nfsrpc_remove(dvp, name, namelen, vp, cred, td, &dnfsva,
1873 if ((dnp->n_flag & NREMOVEWANT)) {
1874 dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG);
1876 wakeup((caddr_t)dnp);
1878 dnp->n_flag &= ~NREMOVEINPROG;
1882 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1884 dnp->n_flag |= NMODIFIED;
1886 dnp->n_attrstamp = 0;
1887 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1890 if (error && NFS_ISV4(dvp))
1891 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1896 * nfs file rename call
1899 nfs_rename(struct vop_rename_args *ap)
1901 struct vnode *fvp = ap->a_fvp;
1902 struct vnode *tvp = ap->a_tvp;
1903 struct vnode *fdvp = ap->a_fdvp;
1904 struct vnode *tdvp = ap->a_tdvp;
1905 struct componentname *tcnp = ap->a_tcnp;
1906 struct componentname *fcnp = ap->a_fcnp;
1907 struct nfsnode *fnp = VTONFS(ap->a_fvp);
1908 struct nfsnode *tdnp = VTONFS(ap->a_tdvp);
1909 struct nfsv4node *newv4 = NULL;
1912 KASSERT((tcnp->cn_flags & HASBUF) != 0 &&
1913 (fcnp->cn_flags & HASBUF) != 0, ("nfs_rename: no name"));
1914 /* Check for cross-device rename */
1915 if ((fvp->v_mount != tdvp->v_mount) ||
1916 (tvp && (fvp->v_mount != tvp->v_mount))) {
1922 printf("nfs_rename: fvp == tvp (can't happen)\n");
1926 if ((error = NFSVOPLOCK(fvp, LK_EXCLUSIVE)) != 0)
1930 * We have to flush B_DELWRI data prior to renaming
1931 * the file. If we don't, the delayed-write buffers
1932 * can be flushed out later after the file has gone stale
1933 * under NFSV3. NFSV2 does not have this problem because
1934 * ( as far as I can tell ) it flushes dirty buffers more
1937 * Skip the rename operation if the fsync fails, this can happen
1938 * due to the server's volume being full, when we pushed out data
1939 * that was written back to our cache earlier. Not checking for
1940 * this condition can result in potential (silent) data loss.
1942 error = VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_thread);
1945 error = VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_thread);
1950 * If the tvp exists and is in use, sillyrename it before doing the
1951 * rename of the new file over it.
1952 * XXX Can't sillyrename a directory.
1954 if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename &&
1955 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1960 error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1961 tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1964 if (error == 0 && NFS_ISV4(tdvp)) {
1966 * For NFSv4, check to see if it is the same name and
1967 * replace the name, if it is different.
1970 sizeof (struct nfsv4node) +
1971 tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1,
1972 M_NFSV4NODE, M_WAITOK);
1975 if (fnp->n_v4 != NULL && fvp->v_type == VREG &&
1976 (fnp->n_v4->n4_namelen != tcnp->cn_namelen ||
1977 NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4),
1978 tcnp->cn_namelen) ||
1979 tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen ||
1980 NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1981 tdnp->n_fhp->nfh_len))) {
1983 { char nnn[100]; int nnnl;
1984 nnnl = (tcnp->cn_namelen < 100) ? tcnp->cn_namelen : 99;
1985 bcopy(tcnp->cn_nameptr, nnn, nnnl);
1987 printf("ren replace=%s\n",nnn);
1990 free(fnp->n_v4, M_NFSV4NODE);
1993 fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len;
1994 fnp->n_v4->n4_namelen = tcnp->cn_namelen;
1995 NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1996 tdnp->n_fhp->nfh_len);
1997 NFSBCOPY(tcnp->cn_nameptr,
1998 NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen);
2000 NFSUNLOCKNODE(tdnp);
2003 free(newv4, M_NFSV4NODE);
2006 if (fvp->v_type == VDIR) {
2007 if (tvp != NULL && tvp->v_type == VDIR)
2022 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
2024 if (error == ENOENT)
2030 * nfs file rename rpc called from nfs_remove() above
2033 nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp,
2034 struct sillyrename *sp)
2037 return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen,
2038 sdvp, NULL, sp->s_name, sp->s_namlen, scnp->cn_cred,
2043 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
2046 nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr,
2047 int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr,
2048 int tnamelen, struct ucred *cred, struct thread *td)
2050 struct nfsvattr fnfsva, tnfsva;
2051 struct nfsnode *fdnp = VTONFS(fdvp);
2052 struct nfsnode *tdnp = VTONFS(tdvp);
2053 int error = 0, fattrflag, tattrflag;
2055 error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp,
2056 tnameptr, tnamelen, cred, td, &fnfsva, &tnfsva, &fattrflag,
2057 &tattrflag, NULL, NULL);
2059 fdnp->n_flag |= NMODIFIED;
2060 if (fattrflag != 0) {
2061 NFSUNLOCKNODE(fdnp);
2062 (void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, NULL, 0, 1);
2064 fdnp->n_attrstamp = 0;
2065 NFSUNLOCKNODE(fdnp);
2066 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(fdvp);
2069 tdnp->n_flag |= NMODIFIED;
2070 if (tattrflag != 0) {
2071 NFSUNLOCKNODE(tdnp);
2072 (void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, NULL, 0, 1);
2074 tdnp->n_attrstamp = 0;
2075 NFSUNLOCKNODE(tdnp);
2076 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
2078 if (error && NFS_ISV4(fdvp))
2079 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2084 * nfs hard link create call
2087 nfs_link(struct vop_link_args *ap)
2089 struct vnode *vp = ap->a_vp;
2090 struct vnode *tdvp = ap->a_tdvp;
2091 struct componentname *cnp = ap->a_cnp;
2092 struct nfsnode *np, *tdnp;
2093 struct nfsvattr nfsva, dnfsva;
2094 int error = 0, attrflag, dattrflag;
2097 * Push all writes to the server, so that the attribute cache
2098 * doesn't get "out of sync" with the server.
2099 * XXX There should be a better way!
2101 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_thread);
2103 error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen,
2104 cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &attrflag,
2106 tdnp = VTONFS(tdvp);
2108 tdnp->n_flag |= NMODIFIED;
2109 if (dattrflag != 0) {
2110 NFSUNLOCKNODE(tdnp);
2111 (void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, NULL, 0, 1);
2113 tdnp->n_attrstamp = 0;
2114 NFSUNLOCKNODE(tdnp);
2115 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
2118 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2122 np->n_attrstamp = 0;
2124 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
2127 * If negative lookup caching is enabled, I might as well
2128 * add an entry for this node. Not necessary for correctness,
2129 * but if negative caching is enabled, then the system
2130 * must care about lookup caching hit rate, so...
2132 if (VFSTONFS(vp->v_mount)->nm_negnametimeo != 0 &&
2133 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) {
2135 cache_enter_time(tdvp, vp, cnp, &nfsva.na_ctime, NULL);
2137 printf("nfs_link: bogus NFS server returned "
2138 "the directory as the new link\n");
2140 if (error && NFS_ISV4(vp))
2141 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
2147 * nfs symbolic link create call
2150 nfs_symlink(struct vop_symlink_args *ap)
2152 struct vnode *dvp = ap->a_dvp;
2153 struct vattr *vap = ap->a_vap;
2154 struct componentname *cnp = ap->a_cnp;
2155 struct nfsvattr nfsva, dnfsva;
2157 struct nfsnode *np = NULL, *dnp;
2158 struct vnode *newvp = NULL;
2159 int error = 0, attrflag, dattrflag, ret;
2161 vap->va_type = VLNK;
2162 error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2163 ap->a_target, vap, cnp->cn_cred, cnp->cn_thread, &dnfsva,
2164 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
2166 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
2167 &np, NULL, LK_EXCLUSIVE);
2173 if (newvp != NULL) {
2175 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2177 } else if (!error) {
2179 * If we do not have an error and we could not extract the
2180 * newvp from the response due to the request being NFSv2, we
2181 * have to do a lookup in order to obtain a newvp to return.
2183 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2184 cnp->cn_cred, cnp->cn_thread, &np);
2192 error = nfscl_maperr(cnp->cn_thread, error,
2193 vap->va_uid, vap->va_gid);
2200 dnp->n_flag |= NMODIFIED;
2201 if (dattrflag != 0) {
2203 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2205 dnp->n_attrstamp = 0;
2207 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2210 * If negative lookup caching is enabled, I might as well
2211 * add an entry for this node. Not necessary for correctness,
2212 * but if negative caching is enabled, then the system
2213 * must care about lookup caching hit rate, so...
2215 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
2216 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) {
2218 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime,
2221 printf("nfs_symlink: bogus NFS server returned "
2222 "the directory as the new file object\n");
2231 nfs_mkdir(struct vop_mkdir_args *ap)
2233 struct vnode *dvp = ap->a_dvp;
2234 struct vattr *vap = ap->a_vap;
2235 struct componentname *cnp = ap->a_cnp;
2236 struct nfsnode *np = NULL, *dnp;
2237 struct vnode *newvp = NULL;
2240 struct nfsvattr nfsva, dnfsva;
2241 int error = 0, attrflag, dattrflag, ret;
2243 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0)
2245 vap->va_type = VDIR;
2246 error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2247 vap, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &nfhp,
2248 &attrflag, &dattrflag, NULL);
2251 dnp->n_flag |= NMODIFIED;
2252 if (dattrflag != 0) {
2254 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2256 dnp->n_attrstamp = 0;
2258 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2261 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
2262 &np, NULL, LK_EXCLUSIVE);
2266 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
2271 if (!error && newvp == NULL) {
2272 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2273 cnp->cn_cred, cnp->cn_thread, &np);
2276 if (newvp->v_type != VDIR)
2284 error = nfscl_maperr(cnp->cn_thread, error,
2285 vap->va_uid, vap->va_gid);
2288 * If negative lookup caching is enabled, I might as well
2289 * add an entry for this node. Not necessary for correctness,
2290 * but if negative caching is enabled, then the system
2291 * must care about lookup caching hit rate, so...
2293 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
2294 (cnp->cn_flags & MAKEENTRY) &&
2295 attrflag != 0 && dattrflag != 0) {
2297 cache_enter_time(dvp, newvp, cnp,
2298 &nfsva.na_ctime, &dnfsva.na_ctime);
2300 printf("nfs_mkdir: bogus NFS server returned "
2301 "the directory that the directory was "
2302 "created in as the new file object\n");
2310 * nfs remove directory call
2313 nfs_rmdir(struct vop_rmdir_args *ap)
2315 struct vnode *vp = ap->a_vp;
2316 struct vnode *dvp = ap->a_dvp;
2317 struct componentname *cnp = ap->a_cnp;
2318 struct nfsnode *dnp;
2319 struct nfsvattr dnfsva;
2320 int error, dattrflag;
2324 error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2325 cnp->cn_cred, cnp->cn_thread, &dnfsva, &dattrflag, NULL);
2328 dnp->n_flag |= NMODIFIED;
2329 if (dattrflag != 0) {
2331 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2333 dnp->n_attrstamp = 0;
2335 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2340 if (error && NFS_ISV4(dvp))
2341 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
2344 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2346 if (error == ENOENT)
2355 nfs_readdir(struct vop_readdir_args *ap)
2357 struct vnode *vp = ap->a_vp;
2358 struct nfsnode *np = VTONFS(vp);
2359 struct uio *uio = ap->a_uio;
2360 ssize_t tresid, left;
2364 if (ap->a_eofflag != NULL)
2366 if (vp->v_type != VDIR)
2370 * First, check for hit on the EOF offset cache
2373 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2374 (np->n_flag & NMODIFIED) == 0) {
2376 if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) {
2378 if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) ||
2379 !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
2381 NFSINCRGLOBAL(nfsstatsv1.direofcache_hits);
2382 if (ap->a_eofflag != NULL)
2392 * NFS always guarantees that directory entries don't straddle
2393 * DIRBLKSIZ boundaries. As such, we need to limit the size
2394 * to an exact multiple of DIRBLKSIZ, to avoid copying a partial
2397 left = uio->uio_resid % DIRBLKSIZ;
2398 if (left == uio->uio_resid)
2400 uio->uio_resid -= left;
2403 * Call ncl_bioread() to do the real work.
2405 tresid = uio->uio_resid;
2406 error = ncl_bioread(vp, uio, 0, ap->a_cred);
2408 if (!error && uio->uio_resid == tresid) {
2409 NFSINCRGLOBAL(nfsstatsv1.direofcache_misses);
2410 if (ap->a_eofflag != NULL)
2414 /* Add the partial DIRBLKSIZ (left) back in. */
2415 uio->uio_resid += left;
2421 * Called from below the buffer cache by ncl_doio().
2424 ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2427 struct nfsvattr nfsva;
2428 nfsuint64 *cookiep, cookie;
2429 struct nfsnode *dnp = VTONFS(vp);
2430 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2431 int error = 0, eof, attrflag;
2433 KASSERT(uiop->uio_iovcnt == 1 &&
2434 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
2435 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
2436 ("nfs readdirrpc bad uio"));
2439 * If there is no cookie, assume directory was stale.
2441 ncl_dircookie_lock(dnp);
2443 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2446 ncl_dircookie_unlock(dnp);
2448 ncl_dircookie_unlock(dnp);
2449 return (NFSERR_BAD_COOKIE);
2452 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2453 (void)ncl_fsinfo(nmp, vp, cred, td);
2455 error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva,
2456 &attrflag, &eof, NULL);
2458 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2462 * We are now either at the end of the directory or have filled
2467 dnp->n_direofoffset = uiop->uio_offset;
2470 if (uiop->uio_resid > 0)
2471 printf("EEK! readdirrpc resid > 0\n");
2472 ncl_dircookie_lock(dnp);
2474 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2476 ncl_dircookie_unlock(dnp);
2478 } else if (NFS_ISV4(vp)) {
2479 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2485 * NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc().
2488 ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2491 struct nfsvattr nfsva;
2492 nfsuint64 *cookiep, cookie;
2493 struct nfsnode *dnp = VTONFS(vp);
2494 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2495 int error = 0, attrflag, eof;
2497 KASSERT(uiop->uio_iovcnt == 1 &&
2498 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
2499 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
2500 ("nfs readdirplusrpc bad uio"));
2503 * If there is no cookie, assume directory was stale.
2505 ncl_dircookie_lock(dnp);
2507 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2510 ncl_dircookie_unlock(dnp);
2512 ncl_dircookie_unlock(dnp);
2513 return (NFSERR_BAD_COOKIE);
2516 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2517 (void)ncl_fsinfo(nmp, vp, cred, td);
2518 error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva,
2519 &attrflag, &eof, NULL);
2521 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2525 * We are now either at end of the directory or have filled the
2530 dnp->n_direofoffset = uiop->uio_offset;
2533 if (uiop->uio_resid > 0)
2534 printf("EEK! readdirplusrpc resid > 0\n");
2535 ncl_dircookie_lock(dnp);
2537 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2539 ncl_dircookie_unlock(dnp);
2541 } else if (NFS_ISV4(vp)) {
2542 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2548 * Silly rename. To make the NFS filesystem that is stateless look a little
2549 * more like the "ufs" a remove of an active vnode is translated to a rename
2550 * to a funny looking filename that is removed by nfs_inactive on the
2551 * nfsnode. There is the potential for another process on a different client
2552 * to create the same funny name between the nfs_lookitup() fails and the
2553 * nfs_rename() completes, but...
2556 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2558 struct sillyrename *sp;
2562 unsigned int lticks;
2566 KASSERT(vp->v_type != VDIR, ("nfs: sillyrename dir"));
2567 sp = malloc(sizeof (struct sillyrename),
2568 M_NEWNFSREQ, M_WAITOK);
2569 sp->s_cred = crhold(cnp->cn_cred);
2574 * Fudge together a funny name.
2575 * Changing the format of the funny name to accommodate more
2576 * sillynames per directory.
2577 * The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is
2578 * CPU ticks since boot.
2580 pid = cnp->cn_thread->td_proc->p_pid;
2581 lticks = (unsigned int)ticks;
2583 sp->s_namlen = sprintf(sp->s_name,
2584 ".nfs.%08x.%04x4.4", lticks,
2586 if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2587 cnp->cn_thread, NULL))
2591 error = nfs_renameit(dvp, vp, cnp, sp);
2594 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2595 cnp->cn_thread, &np);
2596 np->n_sillyrename = sp;
2601 free(sp, M_NEWNFSREQ);
2606 * Look up a file name and optionally either update the file handle or
2607 * allocate an nfsnode, depending on the value of npp.
2608 * npp == NULL --> just do the lookup
2609 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2611 * *npp != NULL --> update the file handle in the vnode
2614 nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred,
2615 struct thread *td, struct nfsnode **npp)
2617 struct vnode *newvp = NULL, *vp;
2618 struct nfsnode *np, *dnp = VTONFS(dvp);
2619 struct nfsfh *nfhp, *onfhp;
2620 struct nfsvattr nfsva, dnfsva;
2621 struct componentname cn;
2622 int error = 0, attrflag, dattrflag;
2625 error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva,
2626 &nfhp, &attrflag, &dattrflag, NULL);
2628 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2629 if (npp && !error) {
2634 * For NFSv4, check to see if it is the same name and
2635 * replace the name, if it is different.
2637 if (np->n_v4 != NULL && nfsva.na_type == VREG &&
2638 (np->n_v4->n4_namelen != len ||
2639 NFSBCMP(name, NFS4NODENAME(np->n_v4), len) ||
2640 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
2641 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2642 dnp->n_fhp->nfh_len))) {
2644 { char nnn[100]; int nnnl;
2645 nnnl = (len < 100) ? len : 99;
2646 bcopy(name, nnn, nnnl);
2648 printf("replace=%s\n",nnn);
2651 free(np->n_v4, M_NFSV4NODE);
2653 sizeof (struct nfsv4node) +
2654 dnp->n_fhp->nfh_len + len - 1,
2655 M_NFSV4NODE, M_WAITOK);
2656 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
2657 np->n_v4->n4_namelen = len;
2658 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2659 dnp->n_fhp->nfh_len);
2660 NFSBCOPY(name, NFS4NODENAME(np->n_v4), len);
2662 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len,
2666 * Rehash node for new file handle.
2668 vfs_hash_rehash(vp, hash);
2671 free(onfhp, M_NFSFH);
2673 } else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) {
2674 free(nfhp, M_NFSFH);
2678 cn.cn_nameptr = name;
2679 cn.cn_namelen = len;
2680 error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td,
2681 &np, NULL, LK_EXCLUSIVE);
2686 if (!attrflag && *npp == NULL) {
2694 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2697 if (npp && *npp == NULL) {
2708 if (error && NFS_ISV4(dvp))
2709 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2714 * Nfs Version 3 and 4 commit rpc
2717 ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred,
2720 struct nfsvattr nfsva;
2721 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2724 int error, attrflag;
2729 if (NFSHASPNFS(nmp) && (np->n_flag & NDSCOMMIT) != 0) {
2730 uio.uio_offset = offset;
2731 uio.uio_resid = cnt;
2732 error = nfscl_doiods(vp, &uio, NULL, NULL,
2733 NFSV4OPEN_ACCESSWRITE, 1, cred, td);
2736 np->n_flag &= ~NDSCOMMIT;
2741 mtx_lock(&nmp->nm_mtx);
2742 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) {
2743 mtx_unlock(&nmp->nm_mtx);
2746 mtx_unlock(&nmp->nm_mtx);
2747 error = nfsrpc_commit(vp, offset, cnt, cred, td, &nfsva,
2751 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL,
2753 if (error != 0 && NFS_ISV4(vp))
2754 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2760 * For async requests when nfsiod(s) are running, queue the request by
2761 * calling ncl_asyncio(), otherwise just all ncl_doio() to do the
2765 nfs_strategy(struct vop_strategy_args *ap)
2773 KASSERT(bp->b_vp == vp, ("missing b_getvp"));
2774 KASSERT(!(bp->b_flags & B_DONE),
2775 ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2777 if (vp->v_type == VREG && bp->b_blkno == bp->b_lblkno)
2778 bp->b_blkno = bp->b_lblkno * (vp->v_bufobj.bo_bsize /
2780 if (bp->b_iocmd == BIO_READ)
2786 * If the op is asynchronous and an i/o daemon is waiting
2787 * queue the request, wake it up and wait for completion
2788 * otherwise just do it ourselves.
2790 if ((bp->b_flags & B_ASYNC) == 0 ||
2791 ncl_asyncio(VFSTONFS(vp->v_mount), bp, NOCRED, curthread))
2792 (void) ncl_doio(vp, bp, cr, curthread, 1);
2797 * fsync vnode op. Just call ncl_flush() with commit == 1.
2801 nfs_fsync(struct vop_fsync_args *ap)
2804 if (ap->a_vp->v_type != VREG) {
2806 * For NFS, metadata is changed synchronously on the server,
2807 * so there is nothing to flush. Also, ncl_flush() clears
2808 * the NMODIFIED flag and that shouldn't be done here for
2813 return (ncl_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1, 0));
2817 * Flush all the blocks associated with a vnode.
2818 * Walk through the buffer pool and push any dirty pages
2819 * associated with the vnode.
2820 * If the called_from_renewthread argument is TRUE, it has been called
2821 * from the NFSv4 renew thread and, as such, cannot block indefinitely
2822 * waiting for a buffer write to complete.
2825 ncl_flush(struct vnode *vp, int waitfor, struct thread *td,
2826 int commit, int called_from_renewthread)
2828 struct nfsnode *np = VTONFS(vp);
2832 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2833 int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2834 int passone = 1, trycnt = 0;
2835 u_quad_t off, endoff, toff;
2836 struct ucred* wcred = NULL;
2837 struct buf **bvec = NULL;
2839 #ifndef NFS_COMMITBVECSIZ
2840 #define NFS_COMMITBVECSIZ 20
2842 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2843 u_int bvecsize = 0, bveccount;
2845 if (called_from_renewthread != 0)
2847 if (nmp->nm_flag & NFSMNT_INT)
2853 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2854 * server, but has not been committed to stable storage on the server
2855 * yet. On the first pass, the byte range is worked out and the commit
2856 * rpc is done. On the second pass, ncl_writebp() is called to do the
2863 if (NFS_ISV34(vp) && commit) {
2864 if (bvec != NULL && bvec != bvec_on_stack)
2867 * Count up how many buffers waiting for a commit.
2871 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2872 if (!BUF_ISLOCKED(bp) &&
2873 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2874 == (B_DELWRI | B_NEEDCOMMIT))
2878 * Allocate space to remember the list of bufs to commit. It is
2879 * important to use M_NOWAIT here to avoid a race with nfs_write.
2880 * If we can't get memory (for whatever reason), we will end up
2881 * committing the buffers one-by-one in the loop below.
2883 if (bveccount > NFS_COMMITBVECSIZ) {
2885 * Release the vnode interlock to avoid a lock
2889 bvec = (struct buf **)
2890 malloc(bveccount * sizeof(struct buf *),
2894 bvec = bvec_on_stack;
2895 bvecsize = NFS_COMMITBVECSIZ;
2897 bvecsize = bveccount;
2899 bvec = bvec_on_stack;
2900 bvecsize = NFS_COMMITBVECSIZ;
2902 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2903 if (bvecpos >= bvecsize)
2905 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2906 nbp = TAILQ_NEXT(bp, b_bobufs);
2909 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2910 (B_DELWRI | B_NEEDCOMMIT)) {
2912 nbp = TAILQ_NEXT(bp, b_bobufs);
2918 * Work out if all buffers are using the same cred
2919 * so we can deal with them all with one commit.
2921 * NOTE: we are not clearing B_DONE here, so we have
2922 * to do it later on in this routine if we intend to
2923 * initiate I/O on the bp.
2925 * Note: to avoid loopback deadlocks, we do not
2926 * assign b_runningbufspace.
2929 wcred = bp->b_wcred;
2930 else if (wcred != bp->b_wcred)
2932 vfs_busy_pages(bp, 1);
2936 * bp is protected by being locked, but nbp is not
2937 * and vfs_busy_pages() may sleep. We have to
2940 nbp = TAILQ_NEXT(bp, b_bobufs);
2943 * A list of these buffers is kept so that the
2944 * second loop knows which buffers have actually
2945 * been committed. This is necessary, since there
2946 * may be a race between the commit rpc and new
2947 * uncommitted writes on the file.
2949 bvec[bvecpos++] = bp;
2950 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2954 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2962 * Commit data on the server, as required.
2963 * If all bufs are using the same wcred, then use that with
2964 * one call for all of them, otherwise commit each one
2967 if (wcred != NOCRED)
2968 retv = ncl_commit(vp, off, (int)(endoff - off),
2972 for (i = 0; i < bvecpos; i++) {
2975 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2977 size = (u_quad_t)(bp->b_dirtyend
2979 retv = ncl_commit(vp, off, (int)size,
2985 if (retv == NFSERR_STALEWRITEVERF)
2986 ncl_clearcommit(vp->v_mount);
2989 * Now, either mark the blocks I/O done or mark the
2990 * blocks dirty, depending on whether the commit
2993 for (i = 0; i < bvecpos; i++) {
2995 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
2998 * Error, leave B_DELWRI intact
3000 vfs_unbusy_pages(bp);
3004 * Success, remove B_DELWRI ( bundirty() ).
3006 * b_dirtyoff/b_dirtyend seem to be NFS
3007 * specific. We should probably move that
3008 * into bundirty(). XXX
3011 bp->b_flags |= B_ASYNC;
3013 bp->b_flags &= ~B_DONE;
3014 bp->b_ioflags &= ~BIO_ERROR;
3015 bp->b_dirtyoff = bp->b_dirtyend = 0;
3022 * Start/do any write(s) that are required.
3026 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
3027 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
3028 if (waitfor != MNT_WAIT || passone)
3031 error = BUF_TIMELOCK(bp,
3032 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK,
3033 BO_LOCKPTR(bo), "nfsfsync", slpflag, slptimeo);
3038 if (error == ENOLCK) {
3042 if (called_from_renewthread != 0) {
3044 * Return EIO so the flush will be retried
3050 if (newnfs_sigintr(nmp, td)) {
3054 if (slpflag == PCATCH) {
3060 if ((bp->b_flags & B_DELWRI) == 0)
3061 panic("nfs_fsync: not dirty");
3062 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
3068 bp->b_flags |= B_ASYNC;
3070 if (newnfs_sigintr(nmp, td)) {
3081 if (waitfor == MNT_WAIT) {
3082 while (bo->bo_numoutput) {
3083 error = bufobj_wwait(bo, slpflag, slptimeo);
3086 if (called_from_renewthread != 0) {
3088 * Return EIO so that the flush will be
3094 error = newnfs_sigintr(nmp, td);
3097 if (slpflag == PCATCH) {
3104 if (bo->bo_dirty.bv_cnt != 0 && commit) {
3109 * Wait for all the async IO requests to drain
3113 while (np->n_directio_asyncwr > 0) {
3114 np->n_flag |= NFSYNCWAIT;
3115 error = newnfs_msleep(td, &np->n_directio_asyncwr,
3116 &np->n_mtx, slpflag | (PRIBIO + 1),
3119 if (newnfs_sigintr(nmp, td)) {
3129 if (NFSHASPNFS(nmp)) {
3130 nfscl_layoutcommit(vp, td);
3132 * Invalidate the attribute cache, since writes to a DS
3133 * won't update the size attribute.
3136 np->n_attrstamp = 0;
3139 if (np->n_flag & NWRITEERR) {
3140 error = np->n_error;
3141 np->n_flag &= ~NWRITEERR;
3143 if (commit && bo->bo_dirty.bv_cnt == 0 &&
3144 bo->bo_numoutput == 0 && np->n_directio_asyncwr == 0)
3145 np->n_flag &= ~NMODIFIED;
3148 if (bvec != NULL && bvec != bvec_on_stack)
3150 if (error == 0 && commit != 0 && waitfor == MNT_WAIT &&
3151 (bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0 ||
3152 np->n_directio_asyncwr != 0)) {
3154 /* try, try again... */
3161 vn_printf(vp, "ncl_flush failed");
3162 error = called_from_renewthread != 0 ? EIO : EBUSY;
3168 * NFS advisory byte-level locks.
3171 nfs_advlock(struct vop_advlock_args *ap)
3173 struct vnode *vp = ap->a_vp;
3175 struct nfsnode *np = VTONFS(ap->a_vp);
3176 struct proc *p = (struct proc *)ap->a_id;
3177 struct thread *td = curthread; /* XXX */
3182 error = NFSVOPLOCK(vp, LK_SHARED);
3185 if (NFS_ISV4(vp) && (ap->a_flags & (F_POSIX | F_FLOCK)) != 0) {
3186 if (vp->v_type != VREG) {
3190 if ((ap->a_flags & F_POSIX) != 0)
3193 cred = td->td_ucred;
3194 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY);
3195 if (VN_IS_DOOMED(vp)) {
3201 * If this is unlocking a write locked region, flush and
3202 * commit them before unlocking. This is required by
3203 * RFC3530 Sec. 9.3.2.
3205 if (ap->a_op == F_UNLCK &&
3206 nfscl_checkwritelocked(vp, ap->a_fl, cred, td, ap->a_id,
3208 (void) ncl_flush(vp, MNT_WAIT, td, 1, 0);
3211 * Loop around doing the lock op, while a blocking lock
3212 * must wait for the lock op to succeed.
3215 ret = nfsrpc_advlock(vp, np->n_size, ap->a_op,
3216 ap->a_fl, 0, cred, td, ap->a_id, ap->a_flags);
3217 if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
3218 ap->a_op == F_SETLK) {
3220 error = nfs_catnap(PZERO | PCATCH, ret,
3224 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
3225 if (VN_IS_DOOMED(vp)) {
3230 } while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
3231 ap->a_op == F_SETLK);
3232 if (ret == NFSERR_DENIED) {
3235 } else if (ret == EINVAL || ret == EBADF || ret == EINTR) {
3238 } else if (ret != 0) {
3244 * Now, if we just got a lock, invalidate data in the buffer
3245 * cache, as required, so that the coherency conforms with
3246 * RFC3530 Sec. 9.3.2.
3248 if (ap->a_op == F_SETLK) {
3249 if ((np->n_flag & NMODIFIED) == 0) {
3250 np->n_attrstamp = 0;
3251 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
3252 ret = VOP_GETATTR(vp, &va, cred);
3254 if ((np->n_flag & NMODIFIED) || ret ||
3255 np->n_change != va.va_filerev) {
3256 (void) ncl_vinvalbuf(vp, V_SAVE, td, 1);
3257 np->n_attrstamp = 0;
3258 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
3259 ret = VOP_GETATTR(vp, &va, cred);
3261 np->n_mtime = va.va_mtime;
3262 np->n_change = va.va_filerev;
3265 /* Mark that a file lock has been acquired. */
3267 np->n_flag |= NHASBEENLOCKED;
3270 } else if (!NFS_ISV4(vp)) {
3271 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
3272 size = VTONFS(vp)->n_size;
3274 error = lf_advlock(ap, &(vp->v_lockf), size);
3276 if (nfs_advlock_p != NULL)
3277 error = nfs_advlock_p(ap);
3283 if (error == 0 && ap->a_op == F_SETLK) {
3284 error = NFSVOPLOCK(vp, LK_SHARED);
3286 /* Mark that a file lock has been acquired. */
3288 np->n_flag |= NHASBEENLOCKED;
3302 * NFS advisory byte-level locks.
3305 nfs_advlockasync(struct vop_advlockasync_args *ap)
3307 struct vnode *vp = ap->a_vp;
3312 return (EOPNOTSUPP);
3313 error = NFSVOPLOCK(vp, LK_SHARED);
3316 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
3317 size = VTONFS(vp)->n_size;
3319 error = lf_advlockasync(ap, &(vp->v_lockf), size);
3328 * Print out the contents of an nfsnode.
3331 nfs_print(struct vop_print_args *ap)
3333 struct vnode *vp = ap->a_vp;
3334 struct nfsnode *np = VTONFS(vp);
3336 printf("\tfileid %jd fsid 0x%jx", (uintmax_t)np->n_vattr.na_fileid,
3337 (uintmax_t)np->n_vattr.na_fsid);
3338 if (vp->v_type == VFIFO)
3345 * This is the "real" nfs::bwrite(struct buf*).
3346 * We set B_CACHE if this is a VMIO buffer.
3349 ncl_writebp(struct buf *bp, int force __unused, struct thread *td)
3351 int oldflags, rtval;
3353 if (bp->b_flags & B_INVAL) {
3358 oldflags = bp->b_flags;
3359 bp->b_flags |= B_CACHE;
3362 * Undirty the bp. We will redirty it later if the I/O fails.
3365 bp->b_flags &= ~B_DONE;
3366 bp->b_ioflags &= ~BIO_ERROR;
3367 bp->b_iocmd = BIO_WRITE;
3369 bufobj_wref(bp->b_bufobj);
3370 curthread->td_ru.ru_oublock++;
3373 * Note: to avoid loopback deadlocks, we do not
3374 * assign b_runningbufspace.
3376 vfs_busy_pages(bp, 1);
3379 bp->b_iooffset = dbtob(bp->b_blkno);
3382 if ((oldflags & B_ASYNC) != 0)
3385 rtval = bufwait(bp);
3386 if (oldflags & B_DELWRI)
3393 * nfs special file access vnode op.
3394 * Essentially just get vattr and then imitate iaccess() since the device is
3395 * local to the client.
3398 nfsspec_access(struct vop_access_args *ap)
3401 struct ucred *cred = ap->a_cred;
3402 struct vnode *vp = ap->a_vp;
3403 accmode_t accmode = ap->a_accmode;
3408 * Disallow write attempts on filesystems mounted read-only;
3409 * unless the file is a socket, fifo, or a block or character
3410 * device resident on the filesystem.
3412 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3413 switch (vp->v_type) {
3423 error = VOP_GETATTR(vp, vap, cred);
3426 error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid,
3433 * Read wrapper for fifos.
3436 nfsfifo_read(struct vop_read_args *ap)
3438 struct nfsnode *np = VTONFS(ap->a_vp);
3446 vfs_timestamp(&np->n_atim);
3448 error = fifo_specops.vop_read(ap);
3453 * Write wrapper for fifos.
3456 nfsfifo_write(struct vop_write_args *ap)
3458 struct nfsnode *np = VTONFS(ap->a_vp);
3465 vfs_timestamp(&np->n_mtim);
3467 return(fifo_specops.vop_write(ap));
3471 * Close wrapper for fifos.
3473 * Update the times on the nfsnode then do fifo close.
3476 nfsfifo_close(struct vop_close_args *ap)
3478 struct vnode *vp = ap->a_vp;
3479 struct nfsnode *np = VTONFS(vp);
3484 if (np->n_flag & (NACC | NUPD)) {
3486 if (np->n_flag & NACC)
3488 if (np->n_flag & NUPD)
3491 if (vrefcnt(vp) == 1 &&
3492 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3494 if (np->n_flag & NACC)
3495 vattr.va_atime = np->n_atim;
3496 if (np->n_flag & NUPD)
3497 vattr.va_mtime = np->n_mtim;
3499 (void)VOP_SETATTR(vp, &vattr, ap->a_cred);
3505 return (fifo_specops.vop_close(ap));
3509 * Just call ncl_writebp() with the force argument set to 1.
3511 * NOTE: B_DONE may or may not be set in a_bp on call.
3514 nfs_bwrite(struct buf *bp)
3517 return (ncl_writebp(bp, 1, curthread));
3520 struct buf_ops buf_ops_newnfs = {
3521 .bop_name = "buf_ops_nfs",
3522 .bop_write = nfs_bwrite,
3523 .bop_strategy = bufstrategy,
3524 .bop_sync = bufsync,
3525 .bop_bdflush = bufbdflush,
3529 nfs_getacl(struct vop_getacl_args *ap)
3533 if (ap->a_type != ACL_TYPE_NFS4)
3534 return (EOPNOTSUPP);
3535 error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3537 if (error > NFSERR_STALE) {
3538 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3545 nfs_setacl(struct vop_setacl_args *ap)
3549 if (ap->a_type != ACL_TYPE_NFS4)
3550 return (EOPNOTSUPP);
3551 error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3553 if (error > NFSERR_STALE) {
3554 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3561 * VOP_ADVISE for NFS.
3562 * Just return 0 for any errors, since it is just a hint.
3565 nfs_advise(struct vop_advise_args *ap)
3567 struct thread *td = curthread;
3568 struct nfsmount *nmp;
3573 * First do vop_stdadvise() to handle the buffer cache.
3575 error = vop_stdadvise(ap);
3578 if (ap->a_start < 0 || ap->a_end < 0)
3580 if (ap->a_end == OFF_MAX)
3582 else if (ap->a_end < ap->a_start)
3585 len = ap->a_end - ap->a_start + 1;
3586 nmp = VFSTONFS(ap->a_vp->v_mount);
3587 mtx_lock(&nmp->nm_mtx);
3588 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
3589 (NFSHASPNFS(nmp) && (nmp->nm_privflag & NFSMNTP_IOADVISETHRUMDS) ==
3590 0) || (nmp->nm_privflag & NFSMNTP_NOADVISE) != 0) {
3591 mtx_unlock(&nmp->nm_mtx);
3594 mtx_unlock(&nmp->nm_mtx);
3595 error = nfsrpc_advise(ap->a_vp, ap->a_start, len, ap->a_advice,
3597 if (error == NFSERR_NOTSUPP) {
3598 mtx_lock(&nmp->nm_mtx);
3599 nmp->nm_privflag |= NFSMNTP_NOADVISE;
3600 mtx_unlock(&nmp->nm_mtx);
3609 nfs_allocate(struct vop_allocate_args *ap)
3611 struct vnode *vp = ap->a_vp;
3612 struct thread *td = curthread;
3613 struct nfsvattr nfsva;
3614 struct nfsmount *nmp;
3615 int attrflag, error, ret;
3618 nmp = VFSTONFS(vp->v_mount);
3619 mtx_lock(&nmp->nm_mtx);
3620 if (NFSHASNFSV4(nmp) && nmp->nm_minorvers >= NFSV42_MINORVERSION &&
3621 (nmp->nm_privflag & NFSMNTP_NOALLOCATE) == 0) {
3622 mtx_unlock(&nmp->nm_mtx);
3624 * Flush first to ensure that the allocate adds to the
3625 * file's allocation on the server.
3627 error = ncl_flush(vp, MNT_WAIT, td, 1, 0);
3629 error = nfsrpc_allocate(vp, *ap->a_offset, *ap->a_len,
3630 &nfsva, &attrflag, td->td_ucred, td, NULL);
3632 *ap->a_offset += *ap->a_len;
3634 } else if (error == NFSERR_NOTSUPP) {
3635 mtx_lock(&nmp->nm_mtx);
3636 nmp->nm_privflag |= NFSMNTP_NOALLOCATE;
3637 mtx_unlock(&nmp->nm_mtx);
3640 mtx_unlock(&nmp->nm_mtx);
3644 * If the NFS server cannot perform the Allocate operation, just call
3645 * vop_stdallocate() to perform it.
3648 error = vop_stdallocate(ap);
3649 if (attrflag != 0) {
3650 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
3651 if (error == 0 && ret != 0)
3655 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
3660 * nfs copy_file_range call
3663 nfs_copy_file_range(struct vop_copy_file_range_args *ap)
3665 struct vnode *invp = ap->a_invp;
3666 struct vnode *outvp = ap->a_outvp;
3668 struct nfsvattr innfsva, outnfsva;
3671 struct nfsmount *nmp;
3673 int error, inattrflag, outattrflag, ret, ret2;
3674 off_t inoff, outoff;
3675 bool consecutive, must_commit, tryoutcred;
3678 nmp = VFSTONFS(invp->v_mount);
3679 mtx_lock(&nmp->nm_mtx);
3680 /* NFSv4.2 Copy is not permitted for infile == outfile. */
3681 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
3682 (nmp->nm_privflag & NFSMNTP_NOCOPY) != 0 || invp == outvp) {
3683 mtx_unlock(&nmp->nm_mtx);
3684 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp,
3685 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags,
3686 ap->a_incred, ap->a_outcred, ap->a_fsizetd);
3689 mtx_unlock(&nmp->nm_mtx);
3691 /* Lock both vnodes, avoiding risk of deadlock. */
3694 error = vn_start_write(outvp, &mp, V_WAIT);
3696 error = vn_lock(outvp, LK_EXCLUSIVE);
3698 error = vn_lock(invp, LK_SHARED | LK_NOWAIT);
3703 vn_finished_write(mp);
3705 error = vn_lock(invp, LK_SHARED);
3711 vn_finished_write(mp);
3712 } while (error == 0);
3717 * Do the vn_rlimit_fsize() check. Should this be above the VOP layer?
3719 io.uio_offset = *ap->a_outoffp;
3720 io.uio_resid = *ap->a_lenp;
3721 error = vn_rlimit_fsize(outvp, &io, ap->a_fsizetd);
3724 * Flush the input file so that the data is up to date before
3725 * the copy. Flush writes for the output file so that they
3726 * do not overwrite the data copied to the output file by the Copy.
3727 * Set the commit argument for both flushes so that the data is on
3728 * stable storage before the Copy RPC. This is done in case the
3729 * server reboots during the Copy and needs to be redone.
3732 error = ncl_flush(invp, MNT_WAIT, curthread, 1, 0);
3734 error = ncl_flush(outvp, MNT_WAIT, curthread, 1, 0);
3736 /* Do the actual NFSv4.2 RPC. */
3738 mtx_lock(&nmp->nm_mtx);
3739 if ((nmp->nm_privflag & NFSMNTP_NOCONSECUTIVE) == 0)
3742 consecutive = false;
3743 mtx_unlock(&nmp->nm_mtx);
3744 inoff = *ap->a_inoffp;
3745 outoff = *ap->a_outoffp;
3747 must_commit = false;
3749 vap = &VTONFS(invp)->n_vattr.na_vattr;
3750 error = VOP_GETATTR(invp, vap, ap->a_incred);
3753 * Clip "len" at va_size so that RFC compliant servers
3754 * will not reply NFSERR_INVAL.
3755 * Setting "len == 0" for the RPC would be preferred,
3756 * but some Linux servers do not support that.
3758 if (inoff >= vap->va_size)
3759 *ap->a_lenp = len = 0;
3760 else if (inoff + len > vap->va_size)
3761 *ap->a_lenp = len = vap->va_size - inoff;
3767 * len will be set to 0 upon a successful Copy RPC.
3768 * As such, this only loops when the Copy RPC needs to be retried.
3770 while (len > 0 && error == 0) {
3771 inattrflag = outattrflag = 0;
3774 error = nfsrpc_copy_file_range(invp, ap->a_inoffp,
3775 outvp, ap->a_outoffp, &len2, ap->a_flags,
3776 &inattrflag, &innfsva, &outattrflag, &outnfsva,
3777 ap->a_outcred, consecutive, &must_commit);
3779 error = nfsrpc_copy_file_range(invp, ap->a_inoffp,
3780 outvp, ap->a_outoffp, &len2, ap->a_flags,
3781 &inattrflag, &innfsva, &outattrflag, &outnfsva,
3782 ap->a_incred, consecutive, &must_commit);
3783 if (inattrflag != 0)
3784 ret = nfscl_loadattrcache(&invp, &innfsva, NULL, NULL,
3786 if (outattrflag != 0)
3787 ret2 = nfscl_loadattrcache(&outvp, &outnfsva, NULL,
3790 if (consecutive == false) {
3792 mtx_lock(&nmp->nm_mtx);
3794 NFSMNTP_NOCONSECUTIVE;
3795 mtx_unlock(&nmp->nm_mtx);
3797 error = NFSERR_OFFLOADNOREQS;
3801 if (len2 > 0 && must_commit && error == 0)
3802 error = ncl_commit(outvp, outoff, *ap->a_lenp,
3803 ap->a_outcred, curthread);
3804 if (error == 0 && ret != 0)
3806 if (error == 0 && ret2 != 0)
3808 } else if (error == NFSERR_OFFLOADNOREQS && consecutive) {
3810 * Try consecutive == false, which is ok only if all
3812 * If only some bytes were copied when consecutive
3813 * is false, there is no way to know which bytes
3814 * still need to be written.
3816 consecutive = false;
3818 } else if (error == NFSERR_ACCES && tryoutcred) {
3819 /* Try again with incred. */
3823 if (error == NFSERR_STALEWRITEVERF) {
3825 * Server rebooted, so do it all again.
3827 *ap->a_inoffp = inoff;
3828 *ap->a_outoffp = outoff;
3830 must_commit = false;
3837 vn_finished_write(mp);
3838 if (error == NFSERR_NOTSUPP || error == NFSERR_OFFLOADNOREQS ||
3839 error == NFSERR_ACCES) {
3841 * Unlike the NFSv4.2 Copy, vn_generic_copy_file_range() can
3842 * use a_incred for the read and a_outcred for the write, so
3843 * try this for NFSERR_ACCES failures for the Copy.
3844 * For NFSERR_NOTSUPP and NFSERR_OFFLOADNOREQS, the Copy can
3845 * never succeed, so disable it.
3847 if (error != NFSERR_ACCES) {
3848 /* Can never do Copy on this mount. */
3849 mtx_lock(&nmp->nm_mtx);
3850 nmp->nm_privflag |= NFSMNTP_NOCOPY;
3851 mtx_unlock(&nmp->nm_mtx);
3853 *ap->a_inoffp = inoff;
3854 *ap->a_outoffp = outoff;
3855 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp,
3856 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags,
3857 ap->a_incred, ap->a_outcred, ap->a_fsizetd);
3858 } else if (error != 0)
3862 error = nfscl_maperr(curthread, error, (uid_t)0, (gid_t)0);
3870 nfs_ioctl(struct vop_ioctl_args *ap)
3872 struct vnode *vp = ap->a_vp;
3873 struct nfsvattr nfsva;
3874 struct nfsmount *nmp;
3875 int attrflag, content, error, ret;
3876 bool eof = false; /* shut up compiler. */
3878 if (vp->v_type != VREG)
3880 nmp = VFSTONFS(vp->v_mount);
3881 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION) {
3882 error = vop_stdioctl(ap);
3886 /* Do the actual NFSv4.2 RPC. */
3887 switch (ap->a_command) {
3889 content = NFSV4CONTENT_DATA;
3892 content = NFSV4CONTENT_HOLE;
3898 error = vn_lock(vp, LK_SHARED);
3902 if (*((off_t *)ap->a_data) >= VTONFS(vp)->n_size)
3906 * Flush all writes, so that the server is up to date.
3907 * Although a Commit is not required, the commit argument
3908 * is set so that, for a pNFS File/Flexible File Layout
3909 * server, the LayoutCommit will be done to ensure the file
3910 * size is up to date on the Metadata Server.
3912 error = ncl_flush(vp, MNT_WAIT, ap->a_td, 1, 0);
3914 error = nfsrpc_seek(vp, (off_t *)ap->a_data, &eof,
3915 content, ap->a_cred, &nfsva, &attrflag);
3916 /* If at eof for FIOSEEKDATA, return ENXIO. */
3917 if (eof && error == 0 && content == NFSV4CONTENT_DATA)
3920 if (attrflag != 0) {
3921 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
3922 if (error == 0 && ret != 0)
3933 * nfs getextattr call
3936 nfs_getextattr(struct vop_getextattr_args *ap)
3938 struct vnode *vp = ap->a_vp;
3939 struct nfsmount *nmp;
3941 struct thread *td = ap->a_td;
3942 struct nfsvattr nfsva;
3944 int attrflag, error, ret;
3946 nmp = VFSTONFS(vp->v_mount);
3947 mtx_lock(&nmp->nm_mtx);
3948 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
3949 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
3950 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
3951 mtx_unlock(&nmp->nm_mtx);
3952 return (EOPNOTSUPP);
3954 mtx_unlock(&nmp->nm_mtx);
3958 cred = td->td_ucred;
3959 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */
3961 error = nfsrpc_getextattr(vp, ap->a_name, ap->a_uio, &len, &nfsva,
3962 &attrflag, cred, td);
3963 if (attrflag != 0) {
3964 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
3965 if (error == 0 && ret != 0)
3968 if (error == 0 && ap->a_size != NULL)
3972 case NFSERR_NOTSUPP:
3973 case NFSERR_OPILLEGAL:
3974 mtx_lock(&nmp->nm_mtx);
3975 nmp->nm_privflag |= NFSMNTP_NOXATTR;
3976 mtx_unlock(&nmp->nm_mtx);
3979 case NFSERR_NOXATTR:
3980 case NFSERR_XATTR2BIG:
3984 error = nfscl_maperr(td, error, 0, 0);
3991 * nfs setextattr call
3994 nfs_setextattr(struct vop_setextattr_args *ap)
3996 struct vnode *vp = ap->a_vp;
3997 struct nfsmount *nmp;
3999 struct thread *td = ap->a_td;
4000 struct nfsvattr nfsva;
4001 int attrflag, error, ret;
4003 nmp = VFSTONFS(vp->v_mount);
4004 mtx_lock(&nmp->nm_mtx);
4005 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
4006 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
4007 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
4008 mtx_unlock(&nmp->nm_mtx);
4009 return (EOPNOTSUPP);
4011 mtx_unlock(&nmp->nm_mtx);
4013 if (ap->a_uio->uio_resid < 0)
4017 cred = td->td_ucred;
4018 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */
4020 error = nfsrpc_setextattr(vp, ap->a_name, ap->a_uio, &nfsva,
4021 &attrflag, cred, td);
4022 if (attrflag != 0) {
4023 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
4024 if (error == 0 && ret != 0)
4029 case NFSERR_NOTSUPP:
4030 case NFSERR_OPILLEGAL:
4031 mtx_lock(&nmp->nm_mtx);
4032 nmp->nm_privflag |= NFSMNTP_NOXATTR;
4033 mtx_unlock(&nmp->nm_mtx);
4036 case NFSERR_NOXATTR:
4037 case NFSERR_XATTR2BIG:
4041 error = nfscl_maperr(td, error, 0, 0);
4048 * nfs listextattr call
4051 nfs_listextattr(struct vop_listextattr_args *ap)
4053 struct vnode *vp = ap->a_vp;
4054 struct nfsmount *nmp;
4056 struct thread *td = ap->a_td;
4057 struct nfsvattr nfsva;
4060 int attrflag, error, ret;
4063 nmp = VFSTONFS(vp->v_mount);
4064 mtx_lock(&nmp->nm_mtx);
4065 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
4066 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
4067 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
4068 mtx_unlock(&nmp->nm_mtx);
4069 return (EOPNOTSUPP);
4071 mtx_unlock(&nmp->nm_mtx);
4075 cred = td->td_ucred;
4077 /* Loop around doing List Extended Attribute RPCs. */
4082 while (!eof && error == 0) {
4083 len = nmp->nm_rsize;
4085 error = nfsrpc_listextattr(vp, &cookie, ap->a_uio, &len, &eof,
4086 &nfsva, &attrflag, cred, td);
4087 if (attrflag != 0) {
4088 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
4090 if (error == 0 && ret != 0)
4095 if (len2 > SSIZE_MAX)
4099 if (error == 0 && ap->a_size != NULL)
4103 case NFSERR_NOTSUPP:
4104 case NFSERR_OPILLEGAL:
4105 mtx_lock(&nmp->nm_mtx);
4106 nmp->nm_privflag |= NFSMNTP_NOXATTR;
4107 mtx_unlock(&nmp->nm_mtx);
4110 case NFSERR_NOXATTR:
4111 case NFSERR_XATTR2BIG:
4115 error = nfscl_maperr(td, error, 0, 0);
4122 * nfs setextattr call
4125 nfs_deleteextattr(struct vop_deleteextattr_args *ap)
4127 struct vnode *vp = ap->a_vp;
4128 struct nfsmount *nmp;
4129 struct nfsvattr nfsva;
4130 int attrflag, error, ret;
4132 nmp = VFSTONFS(vp->v_mount);
4133 mtx_lock(&nmp->nm_mtx);
4134 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
4135 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
4136 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
4137 mtx_unlock(&nmp->nm_mtx);
4138 return (EOPNOTSUPP);
4140 mtx_unlock(&nmp->nm_mtx);
4142 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */
4144 error = nfsrpc_rmextattr(vp, ap->a_name, &nfsva, &attrflag, ap->a_cred,
4146 if (attrflag != 0) {
4147 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
4148 if (error == 0 && ret != 0)
4153 case NFSERR_NOTSUPP:
4154 case NFSERR_OPILLEGAL:
4155 mtx_lock(&nmp->nm_mtx);
4156 nmp->nm_privflag |= NFSMNTP_NOXATTR;
4157 mtx_unlock(&nmp->nm_mtx);
4160 case NFSERR_NOXATTR:
4161 case NFSERR_XATTR2BIG:
4165 error = nfscl_maperr(ap->a_td, error, 0, 0);
4172 * Return POSIX pathconf information applicable to nfs filesystems.
4175 nfs_pathconf(struct vop_pathconf_args *ap)
4177 struct nfsv3_pathconf pc;
4178 struct nfsvattr nfsva;
4179 struct vnode *vp = ap->a_vp;
4180 struct nfsmount *nmp;
4181 struct thread *td = curthread;
4184 int attrflag, error;
4186 if ((NFS_ISV34(vp) && (ap->a_name == _PC_LINK_MAX ||
4187 ap->a_name == _PC_NAME_MAX || ap->a_name == _PC_CHOWN_RESTRICTED ||
4188 ap->a_name == _PC_NO_TRUNC)) ||
4189 (NFS_ISV4(vp) && ap->a_name == _PC_ACL_NFS4)) {
4191 * Since only the above 4 a_names are returned by the NFSv3
4192 * Pathconf RPC, there is no point in doing it for others.
4193 * For NFSv4, the Pathconf RPC (actually a Getattr Op.) can
4194 * be used for _PC_NFS4_ACL as well.
4196 error = nfsrpc_pathconf(vp, &pc, td->td_ucred, td, &nfsva,
4199 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
4205 * For NFSv2 (or NFSv3 when not one of the above 4 a_names),
4208 pc.pc_linkmax = NFS_LINK_MAX;
4209 pc.pc_namemax = NFS_MAXNAMLEN;
4211 pc.pc_chownrestricted = 1;
4212 pc.pc_caseinsensitive = 0;
4213 pc.pc_casepreserving = 1;
4216 switch (ap->a_name) {
4219 *ap->a_retval = pc.pc_linkmax;
4221 *ap->a_retval = MIN(LONG_MAX, pc.pc_linkmax);
4225 *ap->a_retval = pc.pc_namemax;
4228 if (ap->a_vp->v_type == VDIR || ap->a_vp->v_type == VFIFO)
4229 *ap->a_retval = PIPE_BUF;
4233 case _PC_CHOWN_RESTRICTED:
4234 *ap->a_retval = pc.pc_chownrestricted;
4237 *ap->a_retval = pc.pc_notrunc;
4240 if (NFS_ISV4(vp) && nfsrv_useacl != 0 && attrflag != 0 &&
4241 NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL))
4246 case _PC_ACL_PATH_MAX:
4248 *ap->a_retval = ACL_MAX_ENTRIES;
4258 case _PC_ALLOC_SIZE_MIN:
4259 *ap->a_retval = vp->v_mount->mnt_stat.f_bsize;
4261 case _PC_FILESIZEBITS:
4267 case _PC_REC_INCR_XFER_SIZE:
4268 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
4270 case _PC_REC_MAX_XFER_SIZE:
4271 *ap->a_retval = -1; /* means ``unlimited'' */
4273 case _PC_REC_MIN_XFER_SIZE:
4274 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
4276 case _PC_REC_XFER_ALIGN:
4277 *ap->a_retval = PAGE_SIZE;
4279 case _PC_SYMLINK_MAX:
4280 *ap->a_retval = NFS_MAXPATHLEN;
4282 case _PC_MIN_HOLE_SIZE:
4283 /* Only some NFSv4.2 servers support Seek for Holes. */
4285 nmp = VFSTONFS(vp->v_mount);
4286 if (NFS_ISV4(vp) && nmp->nm_minorvers == NFSV42_MINORVERSION) {
4288 * NFSv4.2 doesn't have an attribute for hole size,
4289 * so all we can do is see if the Seek operation is
4290 * supported and then use f_iosize as a "best guess".
4292 mtx_lock(&nmp->nm_mtx);
4293 if ((nmp->nm_privflag & NFSMNTP_SEEKTESTED) == 0) {
4294 mtx_unlock(&nmp->nm_mtx);
4297 error = nfsrpc_seek(vp, &off, &eof,
4298 NFSV4CONTENT_HOLE, td->td_ucred, &nfsva,
4301 nfscl_loadattrcache(&vp, &nfsva,
4303 mtx_lock(&nmp->nm_mtx);
4304 if (error == NFSERR_NOTSUPP)
4305 nmp->nm_privflag |= NFSMNTP_SEEKTESTED;
4307 nmp->nm_privflag |= NFSMNTP_SEEKTESTED |
4311 if ((nmp->nm_privflag & NFSMNTP_SEEK) != 0)
4312 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
4313 mtx_unlock(&nmp->nm_mtx);
4318 error = vop_stdpathconf(ap);