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) &&
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)
1756 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime,
1759 } else if (NFS_ISV4(dvp)) {
1760 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1764 dnp->n_flag |= NMODIFIED;
1766 dnp->n_attrstamp = 0;
1767 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1774 * nfs file remove call
1775 * To try and make nfs semantics closer to ufs semantics, a file that has
1776 * other processes using the vnode is renamed instead of removed and then
1777 * removed later on the last close.
1778 * - If v_usecount > 1
1779 * If a rename is not already in the works
1780 * call nfs_sillyrename() to set it up
1785 nfs_remove(struct vop_remove_args *ap)
1787 struct vnode *vp = ap->a_vp;
1788 struct vnode *dvp = ap->a_dvp;
1789 struct componentname *cnp = ap->a_cnp;
1790 struct nfsnode *np = VTONFS(vp);
1794 KASSERT((cnp->cn_flags & HASBUF) != 0, ("nfs_remove: no name"));
1795 KASSERT(vrefcnt(vp) > 0, ("nfs_remove: bad v_usecount"));
1796 if (vp->v_type == VDIR)
1798 else if (vrefcnt(vp) == 1 || (np->n_sillyrename &&
1799 VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 &&
1800 vattr.va_nlink > 1)) {
1802 * Purge the name cache so that the chance of a lookup for
1803 * the name succeeding while the remove is in progress is
1804 * minimized. Without node locking it can still happen, such
1805 * that an I/O op returns ESTALE, but since you get this if
1806 * another host removes the file..
1810 * throw away biocache buffers, mainly to avoid
1811 * unnecessary delayed writes later.
1813 error = ncl_vinvalbuf(vp, 0, cnp->cn_thread, 1);
1814 if (error != EINTR && error != EIO)
1816 error = nfs_removerpc(dvp, vp, cnp->cn_nameptr,
1817 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread);
1819 * Kludge City: If the first reply to the remove rpc is lost..
1820 * the reply to the retransmitted request will be ENOENT
1821 * since the file was in fact removed
1822 * Therefore, we cheat and return success.
1824 if (error == ENOENT)
1826 } else if (!np->n_sillyrename)
1827 error = nfs_sillyrename(dvp, vp, cnp);
1829 np->n_attrstamp = 0;
1831 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
1836 * nfs file remove rpc called from nfs_inactive
1839 ncl_removeit(struct sillyrename *sp, struct vnode *vp)
1842 * Make sure that the directory vnode is still valid.
1843 * XXX we should lock sp->s_dvp here.
1845 if (sp->s_dvp->v_type == VBAD)
1847 return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen,
1852 * Nfs remove rpc, called from nfs_remove() and ncl_removeit().
1855 nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
1856 int namelen, struct ucred *cred, struct thread *td)
1858 struct nfsvattr dnfsva;
1859 struct nfsnode *dnp = VTONFS(dvp);
1860 int error = 0, dattrflag;
1863 dnp->n_flag |= NREMOVEINPROG;
1865 error = nfsrpc_remove(dvp, name, namelen, vp, cred, td, &dnfsva,
1868 if ((dnp->n_flag & NREMOVEWANT)) {
1869 dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG);
1871 wakeup((caddr_t)dnp);
1873 dnp->n_flag &= ~NREMOVEINPROG;
1877 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1879 dnp->n_flag |= NMODIFIED;
1881 dnp->n_attrstamp = 0;
1882 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1885 if (error && NFS_ISV4(dvp))
1886 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1891 * nfs file rename call
1894 nfs_rename(struct vop_rename_args *ap)
1896 struct vnode *fvp = ap->a_fvp;
1897 struct vnode *tvp = ap->a_tvp;
1898 struct vnode *fdvp = ap->a_fdvp;
1899 struct vnode *tdvp = ap->a_tdvp;
1900 struct componentname *tcnp = ap->a_tcnp;
1901 struct componentname *fcnp = ap->a_fcnp;
1902 struct nfsnode *fnp = VTONFS(ap->a_fvp);
1903 struct nfsnode *tdnp = VTONFS(ap->a_tdvp);
1904 struct nfsv4node *newv4 = NULL;
1907 KASSERT((tcnp->cn_flags & HASBUF) != 0 &&
1908 (fcnp->cn_flags & HASBUF) != 0, ("nfs_rename: no name"));
1909 /* Check for cross-device rename */
1910 if ((fvp->v_mount != tdvp->v_mount) ||
1911 (tvp && (fvp->v_mount != tvp->v_mount))) {
1917 printf("nfs_rename: fvp == tvp (can't happen)\n");
1921 if ((error = NFSVOPLOCK(fvp, LK_EXCLUSIVE)) != 0)
1925 * We have to flush B_DELWRI data prior to renaming
1926 * the file. If we don't, the delayed-write buffers
1927 * can be flushed out later after the file has gone stale
1928 * under NFSV3. NFSV2 does not have this problem because
1929 * ( as far as I can tell ) it flushes dirty buffers more
1932 * Skip the rename operation if the fsync fails, this can happen
1933 * due to the server's volume being full, when we pushed out data
1934 * that was written back to our cache earlier. Not checking for
1935 * this condition can result in potential (silent) data loss.
1937 error = VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_thread);
1940 error = VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_thread);
1945 * If the tvp exists and is in use, sillyrename it before doing the
1946 * rename of the new file over it.
1947 * XXX Can't sillyrename a directory.
1949 if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename &&
1950 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1955 error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1956 tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1959 if (error == 0 && NFS_ISV4(tdvp)) {
1961 * For NFSv4, check to see if it is the same name and
1962 * replace the name, if it is different.
1965 sizeof (struct nfsv4node) +
1966 tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1,
1967 M_NFSV4NODE, M_WAITOK);
1970 if (fnp->n_v4 != NULL && fvp->v_type == VREG &&
1971 (fnp->n_v4->n4_namelen != tcnp->cn_namelen ||
1972 NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4),
1973 tcnp->cn_namelen) ||
1974 tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen ||
1975 NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1976 tdnp->n_fhp->nfh_len))) {
1978 { char nnn[100]; int nnnl;
1979 nnnl = (tcnp->cn_namelen < 100) ? tcnp->cn_namelen : 99;
1980 bcopy(tcnp->cn_nameptr, nnn, nnnl);
1982 printf("ren replace=%s\n",nnn);
1985 free(fnp->n_v4, M_NFSV4NODE);
1988 fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len;
1989 fnp->n_v4->n4_namelen = tcnp->cn_namelen;
1990 NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1991 tdnp->n_fhp->nfh_len);
1992 NFSBCOPY(tcnp->cn_nameptr,
1993 NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen);
1995 NFSUNLOCKNODE(tdnp);
1998 free(newv4, M_NFSV4NODE);
2001 if (fvp->v_type == VDIR) {
2002 if (tvp != NULL && tvp->v_type == VDIR)
2017 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
2019 if (error == ENOENT)
2025 * nfs file rename rpc called from nfs_remove() above
2028 nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp,
2029 struct sillyrename *sp)
2032 return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen,
2033 sdvp, NULL, sp->s_name, sp->s_namlen, scnp->cn_cred,
2038 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
2041 nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr,
2042 int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr,
2043 int tnamelen, struct ucred *cred, struct thread *td)
2045 struct nfsvattr fnfsva, tnfsva;
2046 struct nfsnode *fdnp = VTONFS(fdvp);
2047 struct nfsnode *tdnp = VTONFS(tdvp);
2048 int error = 0, fattrflag, tattrflag;
2050 error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp,
2051 tnameptr, tnamelen, cred, td, &fnfsva, &tnfsva, &fattrflag,
2052 &tattrflag, NULL, NULL);
2054 fdnp->n_flag |= NMODIFIED;
2055 if (fattrflag != 0) {
2056 NFSUNLOCKNODE(fdnp);
2057 (void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, NULL, 0, 1);
2059 fdnp->n_attrstamp = 0;
2060 NFSUNLOCKNODE(fdnp);
2061 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(fdvp);
2064 tdnp->n_flag |= NMODIFIED;
2065 if (tattrflag != 0) {
2066 NFSUNLOCKNODE(tdnp);
2067 (void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, NULL, 0, 1);
2069 tdnp->n_attrstamp = 0;
2070 NFSUNLOCKNODE(tdnp);
2071 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
2073 if (error && NFS_ISV4(fdvp))
2074 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2079 * nfs hard link create call
2082 nfs_link(struct vop_link_args *ap)
2084 struct vnode *vp = ap->a_vp;
2085 struct vnode *tdvp = ap->a_tdvp;
2086 struct componentname *cnp = ap->a_cnp;
2087 struct nfsnode *np, *tdnp;
2088 struct nfsvattr nfsva, dnfsva;
2089 int error = 0, attrflag, dattrflag;
2092 * Push all writes to the server, so that the attribute cache
2093 * doesn't get "out of sync" with the server.
2094 * XXX There should be a better way!
2096 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_thread);
2098 error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen,
2099 cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &attrflag,
2101 tdnp = VTONFS(tdvp);
2103 tdnp->n_flag |= NMODIFIED;
2104 if (dattrflag != 0) {
2105 NFSUNLOCKNODE(tdnp);
2106 (void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, NULL, 0, 1);
2108 tdnp->n_attrstamp = 0;
2109 NFSUNLOCKNODE(tdnp);
2110 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
2113 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2117 np->n_attrstamp = 0;
2119 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
2122 * If negative lookup caching is enabled, I might as well
2123 * add an entry for this node. Not necessary for correctness,
2124 * but if negative caching is enabled, then the system
2125 * must care about lookup caching hit rate, so...
2127 if (VFSTONFS(vp->v_mount)->nm_negnametimeo != 0 &&
2128 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) {
2129 cache_enter_time(tdvp, vp, cnp, &nfsva.na_ctime, NULL);
2131 if (error && NFS_ISV4(vp))
2132 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
2138 * nfs symbolic link create call
2141 nfs_symlink(struct vop_symlink_args *ap)
2143 struct vnode *dvp = ap->a_dvp;
2144 struct vattr *vap = ap->a_vap;
2145 struct componentname *cnp = ap->a_cnp;
2146 struct nfsvattr nfsva, dnfsva;
2148 struct nfsnode *np = NULL, *dnp;
2149 struct vnode *newvp = NULL;
2150 int error = 0, attrflag, dattrflag, ret;
2152 vap->va_type = VLNK;
2153 error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2154 ap->a_target, vap, cnp->cn_cred, cnp->cn_thread, &dnfsva,
2155 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
2157 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
2158 &np, NULL, LK_EXCLUSIVE);
2164 if (newvp != NULL) {
2166 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2168 } else if (!error) {
2170 * If we do not have an error and we could not extract the
2171 * newvp from the response due to the request being NFSv2, we
2172 * have to do a lookup in order to obtain a newvp to return.
2174 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2175 cnp->cn_cred, cnp->cn_thread, &np);
2183 error = nfscl_maperr(cnp->cn_thread, error,
2184 vap->va_uid, vap->va_gid);
2191 dnp->n_flag |= NMODIFIED;
2192 if (dattrflag != 0) {
2194 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2196 dnp->n_attrstamp = 0;
2198 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2201 * If negative lookup caching is enabled, I might as well
2202 * add an entry for this node. Not necessary for correctness,
2203 * but if negative caching is enabled, then the system
2204 * must care about lookup caching hit rate, so...
2206 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
2207 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) {
2208 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime, NULL);
2217 nfs_mkdir(struct vop_mkdir_args *ap)
2219 struct vnode *dvp = ap->a_dvp;
2220 struct vattr *vap = ap->a_vap;
2221 struct componentname *cnp = ap->a_cnp;
2222 struct nfsnode *np = NULL, *dnp;
2223 struct vnode *newvp = NULL;
2226 struct nfsvattr nfsva, dnfsva;
2227 int error = 0, attrflag, dattrflag, ret;
2229 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0)
2231 vap->va_type = VDIR;
2232 error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2233 vap, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &nfhp,
2234 &attrflag, &dattrflag, NULL);
2237 dnp->n_flag |= NMODIFIED;
2238 if (dattrflag != 0) {
2240 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2242 dnp->n_attrstamp = 0;
2244 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2247 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
2248 &np, NULL, LK_EXCLUSIVE);
2252 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
2257 if (!error && newvp == NULL) {
2258 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2259 cnp->cn_cred, cnp->cn_thread, &np);
2262 if (newvp->v_type != VDIR)
2270 error = nfscl_maperr(cnp->cn_thread, error,
2271 vap->va_uid, vap->va_gid);
2274 * If negative lookup caching is enabled, I might as well
2275 * add an entry for this node. Not necessary for correctness,
2276 * but if negative caching is enabled, then the system
2277 * must care about lookup caching hit rate, so...
2279 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
2280 (cnp->cn_flags & MAKEENTRY) &&
2281 attrflag != 0 && dattrflag != 0)
2282 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime,
2290 * nfs remove directory call
2293 nfs_rmdir(struct vop_rmdir_args *ap)
2295 struct vnode *vp = ap->a_vp;
2296 struct vnode *dvp = ap->a_dvp;
2297 struct componentname *cnp = ap->a_cnp;
2298 struct nfsnode *dnp;
2299 struct nfsvattr dnfsva;
2300 int error, dattrflag;
2304 error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2305 cnp->cn_cred, cnp->cn_thread, &dnfsva, &dattrflag, NULL);
2308 dnp->n_flag |= NMODIFIED;
2309 if (dattrflag != 0) {
2311 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2313 dnp->n_attrstamp = 0;
2315 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2320 if (error && NFS_ISV4(dvp))
2321 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
2324 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2326 if (error == ENOENT)
2335 nfs_readdir(struct vop_readdir_args *ap)
2337 struct vnode *vp = ap->a_vp;
2338 struct nfsnode *np = VTONFS(vp);
2339 struct uio *uio = ap->a_uio;
2340 ssize_t tresid, left;
2344 if (ap->a_eofflag != NULL)
2346 if (vp->v_type != VDIR)
2350 * First, check for hit on the EOF offset cache
2352 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2353 (np->n_flag & NMODIFIED) == 0) {
2354 if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) {
2356 if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) ||
2357 !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
2359 NFSINCRGLOBAL(nfsstatsv1.direofcache_hits);
2360 if (ap->a_eofflag != NULL)
2369 * NFS always guarantees that directory entries don't straddle
2370 * DIRBLKSIZ boundaries. As such, we need to limit the size
2371 * to an exact multiple of DIRBLKSIZ, to avoid copying a partial
2374 left = uio->uio_resid % DIRBLKSIZ;
2375 if (left == uio->uio_resid)
2377 uio->uio_resid -= left;
2380 * Call ncl_bioread() to do the real work.
2382 tresid = uio->uio_resid;
2383 error = ncl_bioread(vp, uio, 0, ap->a_cred);
2385 if (!error && uio->uio_resid == tresid) {
2386 NFSINCRGLOBAL(nfsstatsv1.direofcache_misses);
2387 if (ap->a_eofflag != NULL)
2391 /* Add the partial DIRBLKSIZ (left) back in. */
2392 uio->uio_resid += left;
2398 * Called from below the buffer cache by ncl_doio().
2401 ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2404 struct nfsvattr nfsva;
2405 nfsuint64 *cookiep, cookie;
2406 struct nfsnode *dnp = VTONFS(vp);
2407 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2408 int error = 0, eof, attrflag;
2410 KASSERT(uiop->uio_iovcnt == 1 &&
2411 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
2412 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
2413 ("nfs readdirrpc bad uio"));
2416 * If there is no cookie, assume directory was stale.
2418 ncl_dircookie_lock(dnp);
2419 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2422 ncl_dircookie_unlock(dnp);
2424 ncl_dircookie_unlock(dnp);
2425 return (NFSERR_BAD_COOKIE);
2428 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2429 (void)ncl_fsinfo(nmp, vp, cred, td);
2431 error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva,
2432 &attrflag, &eof, NULL);
2434 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2438 * We are now either at the end of the directory or have filled
2442 dnp->n_direofoffset = uiop->uio_offset;
2444 if (uiop->uio_resid > 0)
2445 printf("EEK! readdirrpc resid > 0\n");
2446 ncl_dircookie_lock(dnp);
2447 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2449 ncl_dircookie_unlock(dnp);
2451 } else if (NFS_ISV4(vp)) {
2452 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2458 * NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc().
2461 ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2464 struct nfsvattr nfsva;
2465 nfsuint64 *cookiep, cookie;
2466 struct nfsnode *dnp = VTONFS(vp);
2467 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2468 int error = 0, attrflag, eof;
2470 KASSERT(uiop->uio_iovcnt == 1 &&
2471 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
2472 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
2473 ("nfs readdirplusrpc bad uio"));
2476 * If there is no cookie, assume directory was stale.
2478 ncl_dircookie_lock(dnp);
2479 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2482 ncl_dircookie_unlock(dnp);
2484 ncl_dircookie_unlock(dnp);
2485 return (NFSERR_BAD_COOKIE);
2488 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2489 (void)ncl_fsinfo(nmp, vp, cred, td);
2490 error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva,
2491 &attrflag, &eof, NULL);
2493 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2497 * We are now either at end of the directory or have filled the
2501 dnp->n_direofoffset = uiop->uio_offset;
2503 if (uiop->uio_resid > 0)
2504 printf("EEK! readdirplusrpc resid > 0\n");
2505 ncl_dircookie_lock(dnp);
2506 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2508 ncl_dircookie_unlock(dnp);
2510 } else if (NFS_ISV4(vp)) {
2511 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2517 * Silly rename. To make the NFS filesystem that is stateless look a little
2518 * more like the "ufs" a remove of an active vnode is translated to a rename
2519 * to a funny looking filename that is removed by nfs_inactive on the
2520 * nfsnode. There is the potential for another process on a different client
2521 * to create the same funny name between the nfs_lookitup() fails and the
2522 * nfs_rename() completes, but...
2525 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2527 struct sillyrename *sp;
2531 unsigned int lticks;
2535 KASSERT(vp->v_type != VDIR, ("nfs: sillyrename dir"));
2536 sp = malloc(sizeof (struct sillyrename),
2537 M_NEWNFSREQ, M_WAITOK);
2538 sp->s_cred = crhold(cnp->cn_cred);
2543 * Fudge together a funny name.
2544 * Changing the format of the funny name to accommodate more
2545 * sillynames per directory.
2546 * The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is
2547 * CPU ticks since boot.
2549 pid = cnp->cn_thread->td_proc->p_pid;
2550 lticks = (unsigned int)ticks;
2552 sp->s_namlen = sprintf(sp->s_name,
2553 ".nfs.%08x.%04x4.4", lticks,
2555 if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2556 cnp->cn_thread, NULL))
2560 error = nfs_renameit(dvp, vp, cnp, sp);
2563 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2564 cnp->cn_thread, &np);
2565 np->n_sillyrename = sp;
2570 free(sp, M_NEWNFSREQ);
2575 * Look up a file name and optionally either update the file handle or
2576 * allocate an nfsnode, depending on the value of npp.
2577 * npp == NULL --> just do the lookup
2578 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2580 * *npp != NULL --> update the file handle in the vnode
2583 nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred,
2584 struct thread *td, struct nfsnode **npp)
2586 struct vnode *newvp = NULL, *vp;
2587 struct nfsnode *np, *dnp = VTONFS(dvp);
2588 struct nfsfh *nfhp, *onfhp;
2589 struct nfsvattr nfsva, dnfsva;
2590 struct componentname cn;
2591 int error = 0, attrflag, dattrflag;
2594 error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva,
2595 &nfhp, &attrflag, &dattrflag, NULL);
2597 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2598 if (npp && !error) {
2603 * For NFSv4, check to see if it is the same name and
2604 * replace the name, if it is different.
2606 if (np->n_v4 != NULL && nfsva.na_type == VREG &&
2607 (np->n_v4->n4_namelen != len ||
2608 NFSBCMP(name, NFS4NODENAME(np->n_v4), len) ||
2609 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
2610 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2611 dnp->n_fhp->nfh_len))) {
2613 { char nnn[100]; int nnnl;
2614 nnnl = (len < 100) ? len : 99;
2615 bcopy(name, nnn, nnnl);
2617 printf("replace=%s\n",nnn);
2620 free(np->n_v4, M_NFSV4NODE);
2622 sizeof (struct nfsv4node) +
2623 dnp->n_fhp->nfh_len + len - 1,
2624 M_NFSV4NODE, M_WAITOK);
2625 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
2626 np->n_v4->n4_namelen = len;
2627 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2628 dnp->n_fhp->nfh_len);
2629 NFSBCOPY(name, NFS4NODENAME(np->n_v4), len);
2631 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len,
2635 * Rehash node for new file handle.
2637 vfs_hash_rehash(vp, hash);
2640 free(onfhp, M_NFSFH);
2642 } else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) {
2643 free(nfhp, M_NFSFH);
2647 cn.cn_nameptr = name;
2648 cn.cn_namelen = len;
2649 error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td,
2650 &np, NULL, LK_EXCLUSIVE);
2655 if (!attrflag && *npp == NULL) {
2663 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2666 if (npp && *npp == NULL) {
2677 if (error && NFS_ISV4(dvp))
2678 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2683 * Nfs Version 3 and 4 commit rpc
2686 ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred,
2689 struct nfsvattr nfsva;
2690 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2693 int error, attrflag;
2698 if (NFSHASPNFS(nmp) && (np->n_flag & NDSCOMMIT) != 0) {
2699 uio.uio_offset = offset;
2700 uio.uio_resid = cnt;
2701 error = nfscl_doiods(vp, &uio, NULL, NULL,
2702 NFSV4OPEN_ACCESSWRITE, 1, cred, td);
2705 np->n_flag &= ~NDSCOMMIT;
2710 mtx_lock(&nmp->nm_mtx);
2711 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) {
2712 mtx_unlock(&nmp->nm_mtx);
2715 mtx_unlock(&nmp->nm_mtx);
2716 error = nfsrpc_commit(vp, offset, cnt, cred, td, &nfsva,
2720 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL,
2722 if (error != 0 && NFS_ISV4(vp))
2723 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2729 * For async requests when nfsiod(s) are running, queue the request by
2730 * calling ncl_asyncio(), otherwise just all ncl_doio() to do the
2734 nfs_strategy(struct vop_strategy_args *ap)
2742 KASSERT(bp->b_vp == vp, ("missing b_getvp"));
2743 KASSERT(!(bp->b_flags & B_DONE),
2744 ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2746 if (vp->v_type == VREG && bp->b_blkno == bp->b_lblkno)
2747 bp->b_blkno = bp->b_lblkno * (vp->v_bufobj.bo_bsize /
2749 if (bp->b_iocmd == BIO_READ)
2755 * If the op is asynchronous and an i/o daemon is waiting
2756 * queue the request, wake it up and wait for completion
2757 * otherwise just do it ourselves.
2759 if ((bp->b_flags & B_ASYNC) == 0 ||
2760 ncl_asyncio(VFSTONFS(vp->v_mount), bp, NOCRED, curthread))
2761 (void) ncl_doio(vp, bp, cr, curthread, 1);
2766 * fsync vnode op. Just call ncl_flush() with commit == 1.
2770 nfs_fsync(struct vop_fsync_args *ap)
2773 if (ap->a_vp->v_type != VREG) {
2775 * For NFS, metadata is changed synchronously on the server,
2776 * so there is nothing to flush. Also, ncl_flush() clears
2777 * the NMODIFIED flag and that shouldn't be done here for
2782 return (ncl_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1, 0));
2786 * Flush all the blocks associated with a vnode.
2787 * Walk through the buffer pool and push any dirty pages
2788 * associated with the vnode.
2789 * If the called_from_renewthread argument is TRUE, it has been called
2790 * from the NFSv4 renew thread and, as such, cannot block indefinitely
2791 * waiting for a buffer write to complete.
2794 ncl_flush(struct vnode *vp, int waitfor, struct thread *td,
2795 int commit, int called_from_renewthread)
2797 struct nfsnode *np = VTONFS(vp);
2801 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2802 int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2803 int passone = 1, trycnt = 0;
2804 u_quad_t off, endoff, toff;
2805 struct ucred* wcred = NULL;
2806 struct buf **bvec = NULL;
2808 #ifndef NFS_COMMITBVECSIZ
2809 #define NFS_COMMITBVECSIZ 20
2811 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2812 u_int bvecsize = 0, bveccount;
2814 if (called_from_renewthread != 0)
2816 if (nmp->nm_flag & NFSMNT_INT)
2822 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2823 * server, but has not been committed to stable storage on the server
2824 * yet. On the first pass, the byte range is worked out and the commit
2825 * rpc is done. On the second pass, ncl_writebp() is called to do the
2832 if (NFS_ISV34(vp) && commit) {
2833 if (bvec != NULL && bvec != bvec_on_stack)
2836 * Count up how many buffers waiting for a commit.
2840 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2841 if (!BUF_ISLOCKED(bp) &&
2842 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2843 == (B_DELWRI | B_NEEDCOMMIT))
2847 * Allocate space to remember the list of bufs to commit. It is
2848 * important to use M_NOWAIT here to avoid a race with nfs_write.
2849 * If we can't get memory (for whatever reason), we will end up
2850 * committing the buffers one-by-one in the loop below.
2852 if (bveccount > NFS_COMMITBVECSIZ) {
2854 * Release the vnode interlock to avoid a lock
2858 bvec = (struct buf **)
2859 malloc(bveccount * sizeof(struct buf *),
2863 bvec = bvec_on_stack;
2864 bvecsize = NFS_COMMITBVECSIZ;
2866 bvecsize = bveccount;
2868 bvec = bvec_on_stack;
2869 bvecsize = NFS_COMMITBVECSIZ;
2871 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2872 if (bvecpos >= bvecsize)
2874 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2875 nbp = TAILQ_NEXT(bp, b_bobufs);
2878 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2879 (B_DELWRI | B_NEEDCOMMIT)) {
2881 nbp = TAILQ_NEXT(bp, b_bobufs);
2887 * Work out if all buffers are using the same cred
2888 * so we can deal with them all with one commit.
2890 * NOTE: we are not clearing B_DONE here, so we have
2891 * to do it later on in this routine if we intend to
2892 * initiate I/O on the bp.
2894 * Note: to avoid loopback deadlocks, we do not
2895 * assign b_runningbufspace.
2898 wcred = bp->b_wcred;
2899 else if (wcred != bp->b_wcred)
2901 vfs_busy_pages(bp, 1);
2905 * bp is protected by being locked, but nbp is not
2906 * and vfs_busy_pages() may sleep. We have to
2909 nbp = TAILQ_NEXT(bp, b_bobufs);
2912 * A list of these buffers is kept so that the
2913 * second loop knows which buffers have actually
2914 * been committed. This is necessary, since there
2915 * may be a race between the commit rpc and new
2916 * uncommitted writes on the file.
2918 bvec[bvecpos++] = bp;
2919 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2923 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2931 * Commit data on the server, as required.
2932 * If all bufs are using the same wcred, then use that with
2933 * one call for all of them, otherwise commit each one
2936 if (wcred != NOCRED)
2937 retv = ncl_commit(vp, off, (int)(endoff - off),
2941 for (i = 0; i < bvecpos; i++) {
2944 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2946 size = (u_quad_t)(bp->b_dirtyend
2948 retv = ncl_commit(vp, off, (int)size,
2954 if (retv == NFSERR_STALEWRITEVERF)
2955 ncl_clearcommit(vp->v_mount);
2958 * Now, either mark the blocks I/O done or mark the
2959 * blocks dirty, depending on whether the commit
2962 for (i = 0; i < bvecpos; i++) {
2964 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
2967 * Error, leave B_DELWRI intact
2969 vfs_unbusy_pages(bp);
2973 * Success, remove B_DELWRI ( bundirty() ).
2975 * b_dirtyoff/b_dirtyend seem to be NFS
2976 * specific. We should probably move that
2977 * into bundirty(). XXX
2980 bp->b_flags |= B_ASYNC;
2982 bp->b_flags &= ~B_DONE;
2983 bp->b_ioflags &= ~BIO_ERROR;
2984 bp->b_dirtyoff = bp->b_dirtyend = 0;
2991 * Start/do any write(s) that are required.
2995 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2996 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2997 if (waitfor != MNT_WAIT || passone)
3000 error = BUF_TIMELOCK(bp,
3001 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK,
3002 BO_LOCKPTR(bo), "nfsfsync", slpflag, slptimeo);
3007 if (error == ENOLCK) {
3011 if (called_from_renewthread != 0) {
3013 * Return EIO so the flush will be retried
3019 if (newnfs_sigintr(nmp, td)) {
3023 if (slpflag == PCATCH) {
3029 if ((bp->b_flags & B_DELWRI) == 0)
3030 panic("nfs_fsync: not dirty");
3031 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
3037 bp->b_flags |= B_ASYNC;
3039 if (newnfs_sigintr(nmp, td)) {
3050 if (waitfor == MNT_WAIT) {
3051 while (bo->bo_numoutput) {
3052 error = bufobj_wwait(bo, slpflag, slptimeo);
3055 if (called_from_renewthread != 0) {
3057 * Return EIO so that the flush will be
3063 error = newnfs_sigintr(nmp, td);
3066 if (slpflag == PCATCH) {
3073 if (bo->bo_dirty.bv_cnt != 0 && commit) {
3078 * Wait for all the async IO requests to drain
3082 while (np->n_directio_asyncwr > 0) {
3083 np->n_flag |= NFSYNCWAIT;
3084 error = newnfs_msleep(td, &np->n_directio_asyncwr,
3085 &np->n_mtx, slpflag | (PRIBIO + 1),
3088 if (newnfs_sigintr(nmp, td)) {
3098 if (NFSHASPNFS(nmp)) {
3099 nfscl_layoutcommit(vp, td);
3101 * Invalidate the attribute cache, since writes to a DS
3102 * won't update the size attribute.
3105 np->n_attrstamp = 0;
3108 if (np->n_flag & NWRITEERR) {
3109 error = np->n_error;
3110 np->n_flag &= ~NWRITEERR;
3112 if (commit && bo->bo_dirty.bv_cnt == 0 &&
3113 bo->bo_numoutput == 0 && np->n_directio_asyncwr == 0)
3114 np->n_flag &= ~NMODIFIED;
3117 if (bvec != NULL && bvec != bvec_on_stack)
3119 if (error == 0 && commit != 0 && waitfor == MNT_WAIT &&
3120 (bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0 ||
3121 np->n_directio_asyncwr != 0)) {
3123 /* try, try again... */
3130 vn_printf(vp, "ncl_flush failed");
3131 error = called_from_renewthread != 0 ? EIO : EBUSY;
3137 * NFS advisory byte-level locks.
3140 nfs_advlock(struct vop_advlock_args *ap)
3142 struct vnode *vp = ap->a_vp;
3144 struct nfsnode *np = VTONFS(ap->a_vp);
3145 struct proc *p = (struct proc *)ap->a_id;
3146 struct thread *td = curthread; /* XXX */
3151 error = NFSVOPLOCK(vp, LK_SHARED);
3154 if (NFS_ISV4(vp) && (ap->a_flags & (F_POSIX | F_FLOCK)) != 0) {
3155 if (vp->v_type != VREG) {
3159 if ((ap->a_flags & F_POSIX) != 0)
3162 cred = td->td_ucred;
3163 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY);
3164 if (VN_IS_DOOMED(vp)) {
3170 * If this is unlocking a write locked region, flush and
3171 * commit them before unlocking. This is required by
3172 * RFC3530 Sec. 9.3.2.
3174 if (ap->a_op == F_UNLCK &&
3175 nfscl_checkwritelocked(vp, ap->a_fl, cred, td, ap->a_id,
3177 (void) ncl_flush(vp, MNT_WAIT, td, 1, 0);
3180 * Loop around doing the lock op, while a blocking lock
3181 * must wait for the lock op to succeed.
3184 ret = nfsrpc_advlock(vp, np->n_size, ap->a_op,
3185 ap->a_fl, 0, cred, td, ap->a_id, ap->a_flags);
3186 if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
3187 ap->a_op == F_SETLK) {
3189 error = nfs_catnap(PZERO | PCATCH, ret,
3193 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
3194 if (VN_IS_DOOMED(vp)) {
3199 } while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
3200 ap->a_op == F_SETLK);
3201 if (ret == NFSERR_DENIED) {
3204 } else if (ret == EINVAL || ret == EBADF || ret == EINTR) {
3207 } else if (ret != 0) {
3213 * Now, if we just got a lock, invalidate data in the buffer
3214 * cache, as required, so that the coherency conforms with
3215 * RFC3530 Sec. 9.3.2.
3217 if (ap->a_op == F_SETLK) {
3218 if ((np->n_flag & NMODIFIED) == 0) {
3219 np->n_attrstamp = 0;
3220 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
3221 ret = VOP_GETATTR(vp, &va, cred);
3223 if ((np->n_flag & NMODIFIED) || ret ||
3224 np->n_change != va.va_filerev) {
3225 (void) ncl_vinvalbuf(vp, V_SAVE, td, 1);
3226 np->n_attrstamp = 0;
3227 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
3228 ret = VOP_GETATTR(vp, &va, cred);
3230 np->n_mtime = va.va_mtime;
3231 np->n_change = va.va_filerev;
3234 /* Mark that a file lock has been acquired. */
3236 np->n_flag |= NHASBEENLOCKED;
3239 } else if (!NFS_ISV4(vp)) {
3240 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
3241 size = VTONFS(vp)->n_size;
3243 error = lf_advlock(ap, &(vp->v_lockf), size);
3245 if (nfs_advlock_p != NULL)
3246 error = nfs_advlock_p(ap);
3252 if (error == 0 && ap->a_op == F_SETLK) {
3253 error = NFSVOPLOCK(vp, LK_SHARED);
3255 /* Mark that a file lock has been acquired. */
3257 np->n_flag |= NHASBEENLOCKED;
3271 * NFS advisory byte-level locks.
3274 nfs_advlockasync(struct vop_advlockasync_args *ap)
3276 struct vnode *vp = ap->a_vp;
3281 return (EOPNOTSUPP);
3282 error = NFSVOPLOCK(vp, LK_SHARED);
3285 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
3286 size = VTONFS(vp)->n_size;
3288 error = lf_advlockasync(ap, &(vp->v_lockf), size);
3297 * Print out the contents of an nfsnode.
3300 nfs_print(struct vop_print_args *ap)
3302 struct vnode *vp = ap->a_vp;
3303 struct nfsnode *np = VTONFS(vp);
3305 printf("\tfileid %jd fsid 0x%jx", (uintmax_t)np->n_vattr.na_fileid,
3306 (uintmax_t)np->n_vattr.na_fsid);
3307 if (vp->v_type == VFIFO)
3314 * This is the "real" nfs::bwrite(struct buf*).
3315 * We set B_CACHE if this is a VMIO buffer.
3318 ncl_writebp(struct buf *bp, int force __unused, struct thread *td)
3320 int oldflags, rtval;
3322 if (bp->b_flags & B_INVAL) {
3327 oldflags = bp->b_flags;
3328 bp->b_flags |= B_CACHE;
3331 * Undirty the bp. We will redirty it later if the I/O fails.
3334 bp->b_flags &= ~B_DONE;
3335 bp->b_ioflags &= ~BIO_ERROR;
3336 bp->b_iocmd = BIO_WRITE;
3338 bufobj_wref(bp->b_bufobj);
3339 curthread->td_ru.ru_oublock++;
3342 * Note: to avoid loopback deadlocks, we do not
3343 * assign b_runningbufspace.
3345 vfs_busy_pages(bp, 1);
3348 bp->b_iooffset = dbtob(bp->b_blkno);
3351 if ((oldflags & B_ASYNC) != 0)
3354 rtval = bufwait(bp);
3355 if (oldflags & B_DELWRI)
3362 * nfs special file access vnode op.
3363 * Essentially just get vattr and then imitate iaccess() since the device is
3364 * local to the client.
3367 nfsspec_access(struct vop_access_args *ap)
3370 struct ucred *cred = ap->a_cred;
3371 struct vnode *vp = ap->a_vp;
3372 accmode_t accmode = ap->a_accmode;
3377 * Disallow write attempts on filesystems mounted read-only;
3378 * unless the file is a socket, fifo, or a block or character
3379 * device resident on the filesystem.
3381 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3382 switch (vp->v_type) {
3392 error = VOP_GETATTR(vp, vap, cred);
3395 error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid,
3402 * Read wrapper for fifos.
3405 nfsfifo_read(struct vop_read_args *ap)
3407 struct nfsnode *np = VTONFS(ap->a_vp);
3415 vfs_timestamp(&np->n_atim);
3417 error = fifo_specops.vop_read(ap);
3422 * Write wrapper for fifos.
3425 nfsfifo_write(struct vop_write_args *ap)
3427 struct nfsnode *np = VTONFS(ap->a_vp);
3434 vfs_timestamp(&np->n_mtim);
3436 return(fifo_specops.vop_write(ap));
3440 * Close wrapper for fifos.
3442 * Update the times on the nfsnode then do fifo close.
3445 nfsfifo_close(struct vop_close_args *ap)
3447 struct vnode *vp = ap->a_vp;
3448 struct nfsnode *np = VTONFS(vp);
3453 if (np->n_flag & (NACC | NUPD)) {
3455 if (np->n_flag & NACC)
3457 if (np->n_flag & NUPD)
3460 if (vrefcnt(vp) == 1 &&
3461 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3463 if (np->n_flag & NACC)
3464 vattr.va_atime = np->n_atim;
3465 if (np->n_flag & NUPD)
3466 vattr.va_mtime = np->n_mtim;
3468 (void)VOP_SETATTR(vp, &vattr, ap->a_cred);
3474 return (fifo_specops.vop_close(ap));
3478 * Just call ncl_writebp() with the force argument set to 1.
3480 * NOTE: B_DONE may or may not be set in a_bp on call.
3483 nfs_bwrite(struct buf *bp)
3486 return (ncl_writebp(bp, 1, curthread));
3489 struct buf_ops buf_ops_newnfs = {
3490 .bop_name = "buf_ops_nfs",
3491 .bop_write = nfs_bwrite,
3492 .bop_strategy = bufstrategy,
3493 .bop_sync = bufsync,
3494 .bop_bdflush = bufbdflush,
3498 nfs_getacl(struct vop_getacl_args *ap)
3502 if (ap->a_type != ACL_TYPE_NFS4)
3503 return (EOPNOTSUPP);
3504 error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3506 if (error > NFSERR_STALE) {
3507 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3514 nfs_setacl(struct vop_setacl_args *ap)
3518 if (ap->a_type != ACL_TYPE_NFS4)
3519 return (EOPNOTSUPP);
3520 error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3522 if (error > NFSERR_STALE) {
3523 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3530 * VOP_ADVISE for NFS.
3531 * Just return 0 for any errors, since it is just a hint.
3534 nfs_advise(struct vop_advise_args *ap)
3536 struct thread *td = curthread;
3537 struct nfsmount *nmp;
3542 * First do vop_stdadvise() to handle the buffer cache.
3544 error = vop_stdadvise(ap);
3547 if (ap->a_start < 0 || ap->a_end < 0)
3549 if (ap->a_end == OFF_MAX)
3551 else if (ap->a_end < ap->a_start)
3554 len = ap->a_end - ap->a_start + 1;
3555 nmp = VFSTONFS(ap->a_vp->v_mount);
3556 mtx_lock(&nmp->nm_mtx);
3557 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
3558 (NFSHASPNFS(nmp) && (nmp->nm_privflag & NFSMNTP_IOADVISETHRUMDS) ==
3559 0) || (nmp->nm_privflag & NFSMNTP_NOADVISE) != 0) {
3560 mtx_unlock(&nmp->nm_mtx);
3563 mtx_unlock(&nmp->nm_mtx);
3564 error = nfsrpc_advise(ap->a_vp, ap->a_start, len, ap->a_advice,
3566 if (error == NFSERR_NOTSUPP) {
3567 mtx_lock(&nmp->nm_mtx);
3568 nmp->nm_privflag |= NFSMNTP_NOADVISE;
3569 mtx_unlock(&nmp->nm_mtx);
3578 nfs_allocate(struct vop_allocate_args *ap)
3580 struct vnode *vp = ap->a_vp;
3581 struct thread *td = curthread;
3582 struct nfsvattr nfsva;
3583 struct nfsmount *nmp;
3584 int attrflag, error, ret;
3587 nmp = VFSTONFS(vp->v_mount);
3588 mtx_lock(&nmp->nm_mtx);
3589 if (NFSHASNFSV4(nmp) && nmp->nm_minorvers >= NFSV42_MINORVERSION &&
3590 (nmp->nm_privflag & NFSMNTP_NOALLOCATE) == 0) {
3591 mtx_unlock(&nmp->nm_mtx);
3593 * Flush first to ensure that the allocate adds to the
3594 * file's allocation on the server.
3596 error = ncl_flush(vp, MNT_WAIT, td, 1, 0);
3598 error = nfsrpc_allocate(vp, *ap->a_offset, *ap->a_len,
3599 &nfsva, &attrflag, td->td_ucred, td, NULL);
3601 *ap->a_offset += *ap->a_len;
3603 } else if (error == NFSERR_NOTSUPP) {
3604 mtx_lock(&nmp->nm_mtx);
3605 nmp->nm_privflag |= NFSMNTP_NOALLOCATE;
3606 mtx_unlock(&nmp->nm_mtx);
3609 mtx_unlock(&nmp->nm_mtx);
3613 * If the NFS server cannot perform the Allocate operation, just call
3614 * vop_stdallocate() to perform it.
3617 error = vop_stdallocate(ap);
3618 if (attrflag != 0) {
3619 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
3620 if (error == 0 && ret != 0)
3624 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
3629 * nfs copy_file_range call
3632 nfs_copy_file_range(struct vop_copy_file_range_args *ap)
3634 struct vnode *invp = ap->a_invp;
3635 struct vnode *outvp = ap->a_outvp;
3637 struct nfsvattr innfsva, outnfsva;
3640 struct nfsmount *nmp;
3642 int error, inattrflag, outattrflag, ret, ret2;
3643 off_t inoff, outoff;
3644 bool consecutive, must_commit, tryoutcred;
3647 nmp = VFSTONFS(invp->v_mount);
3648 mtx_lock(&nmp->nm_mtx);
3649 /* NFSv4.2 Copy is not permitted for infile == outfile. */
3650 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
3651 (nmp->nm_privflag & NFSMNTP_NOCOPY) != 0 || invp == outvp) {
3652 mtx_unlock(&nmp->nm_mtx);
3653 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp,
3654 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags,
3655 ap->a_incred, ap->a_outcred, ap->a_fsizetd);
3658 mtx_unlock(&nmp->nm_mtx);
3660 /* Lock both vnodes, avoiding risk of deadlock. */
3663 error = vn_start_write(outvp, &mp, V_WAIT);
3665 error = vn_lock(outvp, LK_EXCLUSIVE);
3667 error = vn_lock(invp, LK_SHARED | LK_NOWAIT);
3672 vn_finished_write(mp);
3674 error = vn_lock(invp, LK_SHARED);
3680 vn_finished_write(mp);
3681 } while (error == 0);
3686 * Do the vn_rlimit_fsize() check. Should this be above the VOP layer?
3688 io.uio_offset = *ap->a_outoffp;
3689 io.uio_resid = *ap->a_lenp;
3690 error = vn_rlimit_fsize(outvp, &io, ap->a_fsizetd);
3693 * Flush the input file so that the data is up to date before
3694 * the copy. Flush writes for the output file so that they
3695 * do not overwrite the data copied to the output file by the Copy.
3696 * Set the commit argument for both flushes so that the data is on
3697 * stable storage before the Copy RPC. This is done in case the
3698 * server reboots during the Copy and needs to be redone.
3701 error = ncl_flush(invp, MNT_WAIT, curthread, 1, 0);
3703 error = ncl_flush(outvp, MNT_WAIT, curthread, 1, 0);
3705 /* Do the actual NFSv4.2 RPC. */
3707 mtx_lock(&nmp->nm_mtx);
3708 if ((nmp->nm_privflag & NFSMNTP_NOCONSECUTIVE) == 0)
3711 consecutive = false;
3712 mtx_unlock(&nmp->nm_mtx);
3713 inoff = *ap->a_inoffp;
3714 outoff = *ap->a_outoffp;
3716 must_commit = false;
3718 vap = &VTONFS(invp)->n_vattr.na_vattr;
3719 error = VOP_GETATTR(invp, vap, ap->a_incred);
3722 * Clip "len" at va_size so that RFC compliant servers
3723 * will not reply NFSERR_INVAL.
3724 * Setting "len == 0" for the RPC would be preferred,
3725 * but some Linux servers do not support that.
3727 if (inoff >= vap->va_size)
3728 *ap->a_lenp = len = 0;
3729 else if (inoff + len > vap->va_size)
3730 *ap->a_lenp = len = vap->va_size - inoff;
3736 * len will be set to 0 upon a successful Copy RPC.
3737 * As such, this only loops when the Copy RPC needs to be retried.
3739 while (len > 0 && error == 0) {
3740 inattrflag = outattrflag = 0;
3743 error = nfsrpc_copy_file_range(invp, ap->a_inoffp,
3744 outvp, ap->a_outoffp, &len2, ap->a_flags,
3745 &inattrflag, &innfsva, &outattrflag, &outnfsva,
3746 ap->a_outcred, consecutive, &must_commit);
3748 error = nfsrpc_copy_file_range(invp, ap->a_inoffp,
3749 outvp, ap->a_outoffp, &len2, ap->a_flags,
3750 &inattrflag, &innfsva, &outattrflag, &outnfsva,
3751 ap->a_incred, consecutive, &must_commit);
3752 if (inattrflag != 0)
3753 ret = nfscl_loadattrcache(&invp, &innfsva, NULL, NULL,
3755 if (outattrflag != 0)
3756 ret2 = nfscl_loadattrcache(&outvp, &outnfsva, NULL,
3759 if (consecutive == false) {
3761 mtx_lock(&nmp->nm_mtx);
3763 NFSMNTP_NOCONSECUTIVE;
3764 mtx_unlock(&nmp->nm_mtx);
3766 error = NFSERR_OFFLOADNOREQS;
3770 if (len2 > 0 && must_commit && error == 0)
3771 error = ncl_commit(outvp, outoff, *ap->a_lenp,
3772 ap->a_outcred, curthread);
3773 if (error == 0 && ret != 0)
3775 if (error == 0 && ret2 != 0)
3777 } else if (error == NFSERR_OFFLOADNOREQS && consecutive) {
3779 * Try consecutive == false, which is ok only if all
3781 * If only some bytes were copied when consecutive
3782 * is false, there is no way to know which bytes
3783 * still need to be written.
3785 consecutive = false;
3787 } else if (error == NFSERR_ACCES && tryoutcred) {
3788 /* Try again with incred. */
3792 if (error == NFSERR_STALEWRITEVERF) {
3794 * Server rebooted, so do it all again.
3796 *ap->a_inoffp = inoff;
3797 *ap->a_outoffp = outoff;
3799 must_commit = false;
3806 vn_finished_write(mp);
3807 if (error == NFSERR_NOTSUPP || error == NFSERR_OFFLOADNOREQS ||
3808 error == NFSERR_ACCES) {
3810 * Unlike the NFSv4.2 Copy, vn_generic_copy_file_range() can
3811 * use a_incred for the read and a_outcred for the write, so
3812 * try this for NFSERR_ACCES failures for the Copy.
3813 * For NFSERR_NOTSUPP and NFSERR_OFFLOADNOREQS, the Copy can
3814 * never succeed, so disable it.
3816 if (error != NFSERR_ACCES) {
3817 /* Can never do Copy on this mount. */
3818 mtx_lock(&nmp->nm_mtx);
3819 nmp->nm_privflag |= NFSMNTP_NOCOPY;
3820 mtx_unlock(&nmp->nm_mtx);
3822 *ap->a_inoffp = inoff;
3823 *ap->a_outoffp = outoff;
3824 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp,
3825 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags,
3826 ap->a_incred, ap->a_outcred, ap->a_fsizetd);
3827 } else if (error != 0)
3831 error = nfscl_maperr(curthread, error, (uid_t)0, (gid_t)0);
3839 nfs_ioctl(struct vop_ioctl_args *ap)
3841 struct vnode *vp = ap->a_vp;
3842 struct nfsvattr nfsva;
3843 struct nfsmount *nmp;
3844 int attrflag, content, error, ret;
3845 bool eof = false; /* shut up compiler. */
3847 if (vp->v_type != VREG)
3849 nmp = VFSTONFS(vp->v_mount);
3850 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION) {
3851 error = vop_stdioctl(ap);
3855 /* Do the actual NFSv4.2 RPC. */
3856 switch (ap->a_command) {
3858 content = NFSV4CONTENT_DATA;
3861 content = NFSV4CONTENT_HOLE;
3867 error = vn_lock(vp, LK_SHARED);
3871 if (*((off_t *)ap->a_data) >= VTONFS(vp)->n_size)
3875 * Flush all writes, so that the server is up to date.
3876 * Although a Commit is not required, the commit argument
3877 * is set so that, for a pNFS File/Flexible File Layout
3878 * server, the LayoutCommit will be done to ensure the file
3879 * size is up to date on the Metadata Server.
3881 error = ncl_flush(vp, MNT_WAIT, ap->a_td, 1, 0);
3883 error = nfsrpc_seek(vp, (off_t *)ap->a_data, &eof,
3884 content, ap->a_cred, &nfsva, &attrflag);
3885 /* If at eof for FIOSEEKDATA, return ENXIO. */
3886 if (eof && error == 0 && content == NFSV4CONTENT_DATA)
3889 if (attrflag != 0) {
3890 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
3891 if (error == 0 && ret != 0)
3902 * nfs getextattr call
3905 nfs_getextattr(struct vop_getextattr_args *ap)
3907 struct vnode *vp = ap->a_vp;
3908 struct nfsmount *nmp;
3910 struct thread *td = ap->a_td;
3911 struct nfsvattr nfsva;
3913 int attrflag, error, ret;
3915 nmp = VFSTONFS(vp->v_mount);
3916 mtx_lock(&nmp->nm_mtx);
3917 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
3918 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
3919 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
3920 mtx_unlock(&nmp->nm_mtx);
3921 return (EOPNOTSUPP);
3923 mtx_unlock(&nmp->nm_mtx);
3927 cred = td->td_ucred;
3928 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */
3930 error = nfsrpc_getextattr(vp, ap->a_name, ap->a_uio, &len, &nfsva,
3931 &attrflag, cred, td);
3932 if (attrflag != 0) {
3933 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
3934 if (error == 0 && ret != 0)
3937 if (error == 0 && ap->a_size != NULL)
3941 case NFSERR_NOTSUPP:
3942 case NFSERR_OPILLEGAL:
3943 mtx_lock(&nmp->nm_mtx);
3944 nmp->nm_privflag |= NFSMNTP_NOXATTR;
3945 mtx_unlock(&nmp->nm_mtx);
3948 case NFSERR_NOXATTR:
3949 case NFSERR_XATTR2BIG:
3953 error = nfscl_maperr(td, error, 0, 0);
3960 * nfs setextattr call
3963 nfs_setextattr(struct vop_setextattr_args *ap)
3965 struct vnode *vp = ap->a_vp;
3966 struct nfsmount *nmp;
3968 struct thread *td = ap->a_td;
3969 struct nfsvattr nfsva;
3970 int attrflag, error, ret;
3972 nmp = VFSTONFS(vp->v_mount);
3973 mtx_lock(&nmp->nm_mtx);
3974 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
3975 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
3976 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
3977 mtx_unlock(&nmp->nm_mtx);
3978 return (EOPNOTSUPP);
3980 mtx_unlock(&nmp->nm_mtx);
3982 if (ap->a_uio->uio_resid < 0)
3986 cred = td->td_ucred;
3987 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */
3989 error = nfsrpc_setextattr(vp, ap->a_name, ap->a_uio, &nfsva,
3990 &attrflag, cred, td);
3991 if (attrflag != 0) {
3992 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
3993 if (error == 0 && ret != 0)
3998 case NFSERR_NOTSUPP:
3999 case NFSERR_OPILLEGAL:
4000 mtx_lock(&nmp->nm_mtx);
4001 nmp->nm_privflag |= NFSMNTP_NOXATTR;
4002 mtx_unlock(&nmp->nm_mtx);
4005 case NFSERR_NOXATTR:
4006 case NFSERR_XATTR2BIG:
4010 error = nfscl_maperr(td, error, 0, 0);
4017 * nfs listextattr call
4020 nfs_listextattr(struct vop_listextattr_args *ap)
4022 struct vnode *vp = ap->a_vp;
4023 struct nfsmount *nmp;
4025 struct thread *td = ap->a_td;
4026 struct nfsvattr nfsva;
4029 int attrflag, error, ret;
4032 nmp = VFSTONFS(vp->v_mount);
4033 mtx_lock(&nmp->nm_mtx);
4034 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
4035 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
4036 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
4037 mtx_unlock(&nmp->nm_mtx);
4038 return (EOPNOTSUPP);
4040 mtx_unlock(&nmp->nm_mtx);
4044 cred = td->td_ucred;
4046 /* Loop around doing List Extended Attribute RPCs. */
4051 while (!eof && error == 0) {
4052 len = nmp->nm_rsize;
4054 error = nfsrpc_listextattr(vp, &cookie, ap->a_uio, &len, &eof,
4055 &nfsva, &attrflag, cred, td);
4056 if (attrflag != 0) {
4057 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
4059 if (error == 0 && ret != 0)
4064 if (len2 > SSIZE_MAX)
4068 if (error == 0 && ap->a_size != NULL)
4072 case NFSERR_NOTSUPP:
4073 case NFSERR_OPILLEGAL:
4074 mtx_lock(&nmp->nm_mtx);
4075 nmp->nm_privflag |= NFSMNTP_NOXATTR;
4076 mtx_unlock(&nmp->nm_mtx);
4079 case NFSERR_NOXATTR:
4080 case NFSERR_XATTR2BIG:
4084 error = nfscl_maperr(td, error, 0, 0);
4091 * nfs setextattr call
4094 nfs_deleteextattr(struct vop_deleteextattr_args *ap)
4096 struct vnode *vp = ap->a_vp;
4097 struct nfsmount *nmp;
4098 struct nfsvattr nfsva;
4099 int attrflag, error, ret;
4101 nmp = VFSTONFS(vp->v_mount);
4102 mtx_lock(&nmp->nm_mtx);
4103 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
4104 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
4105 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
4106 mtx_unlock(&nmp->nm_mtx);
4107 return (EOPNOTSUPP);
4109 mtx_unlock(&nmp->nm_mtx);
4111 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */
4113 error = nfsrpc_rmextattr(vp, ap->a_name, &nfsva, &attrflag, ap->a_cred,
4115 if (attrflag != 0) {
4116 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
4117 if (error == 0 && ret != 0)
4122 case NFSERR_NOTSUPP:
4123 case NFSERR_OPILLEGAL:
4124 mtx_lock(&nmp->nm_mtx);
4125 nmp->nm_privflag |= NFSMNTP_NOXATTR;
4126 mtx_unlock(&nmp->nm_mtx);
4129 case NFSERR_NOXATTR:
4130 case NFSERR_XATTR2BIG:
4134 error = nfscl_maperr(ap->a_td, error, 0, 0);
4141 * Return POSIX pathconf information applicable to nfs filesystems.
4144 nfs_pathconf(struct vop_pathconf_args *ap)
4146 struct nfsv3_pathconf pc;
4147 struct nfsvattr nfsva;
4148 struct vnode *vp = ap->a_vp;
4149 struct nfsmount *nmp;
4150 struct thread *td = curthread;
4153 int attrflag, error;
4155 if ((NFS_ISV34(vp) && (ap->a_name == _PC_LINK_MAX ||
4156 ap->a_name == _PC_NAME_MAX || ap->a_name == _PC_CHOWN_RESTRICTED ||
4157 ap->a_name == _PC_NO_TRUNC)) ||
4158 (NFS_ISV4(vp) && ap->a_name == _PC_ACL_NFS4)) {
4160 * Since only the above 4 a_names are returned by the NFSv3
4161 * Pathconf RPC, there is no point in doing it for others.
4162 * For NFSv4, the Pathconf RPC (actually a Getattr Op.) can
4163 * be used for _PC_NFS4_ACL as well.
4165 error = nfsrpc_pathconf(vp, &pc, td->td_ucred, td, &nfsva,
4168 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
4174 * For NFSv2 (or NFSv3 when not one of the above 4 a_names),
4177 pc.pc_linkmax = NFS_LINK_MAX;
4178 pc.pc_namemax = NFS_MAXNAMLEN;
4180 pc.pc_chownrestricted = 1;
4181 pc.pc_caseinsensitive = 0;
4182 pc.pc_casepreserving = 1;
4185 switch (ap->a_name) {
4188 *ap->a_retval = pc.pc_linkmax;
4190 *ap->a_retval = MIN(LONG_MAX, pc.pc_linkmax);
4194 *ap->a_retval = pc.pc_namemax;
4197 if (ap->a_vp->v_type == VDIR || ap->a_vp->v_type == VFIFO)
4198 *ap->a_retval = PIPE_BUF;
4202 case _PC_CHOWN_RESTRICTED:
4203 *ap->a_retval = pc.pc_chownrestricted;
4206 *ap->a_retval = pc.pc_notrunc;
4209 if (NFS_ISV4(vp) && nfsrv_useacl != 0 && attrflag != 0 &&
4210 NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL))
4215 case _PC_ACL_PATH_MAX:
4217 *ap->a_retval = ACL_MAX_ENTRIES;
4227 case _PC_ALLOC_SIZE_MIN:
4228 *ap->a_retval = vp->v_mount->mnt_stat.f_bsize;
4230 case _PC_FILESIZEBITS:
4236 case _PC_REC_INCR_XFER_SIZE:
4237 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
4239 case _PC_REC_MAX_XFER_SIZE:
4240 *ap->a_retval = -1; /* means ``unlimited'' */
4242 case _PC_REC_MIN_XFER_SIZE:
4243 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
4245 case _PC_REC_XFER_ALIGN:
4246 *ap->a_retval = PAGE_SIZE;
4248 case _PC_SYMLINK_MAX:
4249 *ap->a_retval = NFS_MAXPATHLEN;
4251 case _PC_MIN_HOLE_SIZE:
4252 /* Only some NFSv4.2 servers support Seek for Holes. */
4254 nmp = VFSTONFS(vp->v_mount);
4255 if (NFS_ISV4(vp) && nmp->nm_minorvers == NFSV42_MINORVERSION) {
4257 * NFSv4.2 doesn't have an attribute for hole size,
4258 * so all we can do is see if the Seek operation is
4259 * supported and then use f_iosize as a "best guess".
4261 mtx_lock(&nmp->nm_mtx);
4262 if ((nmp->nm_privflag & NFSMNTP_SEEKTESTED) == 0) {
4263 mtx_unlock(&nmp->nm_mtx);
4266 error = nfsrpc_seek(vp, &off, &eof,
4267 NFSV4CONTENT_HOLE, td->td_ucred, &nfsva,
4270 nfscl_loadattrcache(&vp, &nfsva,
4272 mtx_lock(&nmp->nm_mtx);
4273 if (error == NFSERR_NOTSUPP)
4274 nmp->nm_privflag |= NFSMNTP_SEEKTESTED;
4276 nmp->nm_privflag |= NFSMNTP_SEEKTESTED |
4280 if ((nmp->nm_privflag & NFSMNTP_SEEK) != 0)
4281 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
4282 mtx_unlock(&nmp->nm_mtx);
4287 error = vop_stdpathconf(ap);