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);
605 * Check to see if the type is ok
606 * and that deletion is not in progress.
607 * For paged in text files, you will need to flush the page cache
608 * if consistency is lost.
612 nfs_open(struct vop_open_args *ap)
614 struct vnode *vp = ap->a_vp;
615 struct nfsnode *np = VTONFS(vp);
618 int fmode = ap->a_mode;
622 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK)
626 * For NFSv4, we need to do the Open Op before cache validation,
627 * so that we conform to RFC3530 Sec. 9.3.1.
630 error = nfsrpc_open(vp, fmode, ap->a_cred, ap->a_td);
632 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
639 * Now, if this Open will be doing reading, re-validate/flush the
640 * cache, so that Close/Open coherency is maintained.
643 if (np->n_flag & NMODIFIED) {
645 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
646 if (error == EINTR || error == EIO) {
648 (void) nfsrpc_close(vp, 0, ap->a_td);
653 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
654 if (vp->v_type == VDIR)
655 np->n_direofoffset = 0;
657 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
660 (void) nfsrpc_close(vp, 0, ap->a_td);
664 np->n_mtime = vattr.va_mtime;
666 np->n_change = vattr.va_filerev;
669 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
672 (void) nfsrpc_close(vp, 0, ap->a_td);
676 if ((NFS_ISV4(vp) && np->n_change != vattr.va_filerev) ||
677 NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
678 if (vp->v_type == VDIR)
679 np->n_direofoffset = 0;
681 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
682 if (error == EINTR || error == EIO) {
684 (void) nfsrpc_close(vp, 0, ap->a_td);
688 np->n_mtime = vattr.va_mtime;
690 np->n_change = vattr.va_filerev;
695 * If the object has >= 1 O_DIRECT active opens, we disable caching.
697 if (newnfs_directio_enable && (fmode & O_DIRECT) &&
698 (vp->v_type == VREG)) {
699 if (np->n_directio_opens == 0) {
701 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
704 (void) nfsrpc_close(vp, 0, ap->a_td);
708 np->n_flag |= NNONCACHE;
710 np->n_directio_opens++;
713 /* If opened for writing via NFSv4.1 or later, mark that for pNFS. */
714 if (NFSHASPNFS(VFSTONFS(vp->v_mount)) && (fmode & FWRITE) != 0)
715 np->n_flag |= NWRITEOPENED;
718 * If this is an open for writing, capture a reference to the
719 * credentials, so they can be used by ncl_putpages(). Using
720 * these write credentials is preferable to the credentials of
721 * whatever thread happens to be doing the VOP_PUTPAGES() since
722 * the write RPCs are less likely to fail with EACCES.
724 if ((fmode & FWRITE) != 0) {
725 cred = np->n_writecred;
726 np->n_writecred = crhold(ap->a_cred);
733 vnode_create_vobject(vp, vattr.va_size, ap->a_td);
736 * If the text file has been mmap'd, flush any dirty pages to the
737 * buffer cache and then...
738 * Make sure all writes are pushed to the NFS server. If this is not
739 * done, the modify time of the file can change while the text
740 * file is being executed. This will cause the process that is
741 * executing the text file to be terminated.
743 if (vp->v_writecount <= -1) {
744 if ((obj = vp->v_object) != NULL &&
745 vm_object_mightbedirty(obj)) {
746 VM_OBJECT_WLOCK(obj);
747 vm_object_page_clean(obj, 0, 0, OBJPC_SYNC);
748 VM_OBJECT_WUNLOCK(obj);
751 /* Now, flush the buffer cache. */
752 ncl_flush(vp, MNT_WAIT, curthread, 0, 0);
754 /* And, finally, make sure that n_mtime is up to date. */
757 np->n_mtime = np->n_vattr.na_mtime;
765 * What an NFS client should do upon close after writing is a debatable issue.
766 * Most NFS clients push delayed writes to the server upon close, basically for
768 * 1 - So that any write errors may be reported back to the client process
769 * doing the close system call. By far the two most likely errors are
770 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
771 * 2 - To put a worst case upper bound on cache inconsistency between
772 * multiple clients for the file.
773 * There is also a consistency problem for Version 2 of the protocol w.r.t.
774 * not being able to tell if other clients are writing a file concurrently,
775 * since there is no way of knowing if the changed modify time in the reply
776 * is only due to the write for this client.
777 * (NFS Version 3 provides weak cache consistency data in the reply that
778 * should be sufficient to detect and handle this case.)
780 * The current code does the following:
781 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
782 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
783 * or commit them (this satisfies 1 and 2 except for the
784 * case where the server crashes after this close but
785 * before the commit RPC, which is felt to be "good
786 * enough". Changing the last argument to ncl_flush() to
787 * a 1 would force a commit operation, if it is felt a
788 * commit is necessary now.
789 * for NFS Version 4 - flush the dirty buffers and commit them, if
790 * nfscl_mustflush() says this is necessary.
791 * It is necessary if there is no write delegation held,
792 * in order to satisfy open/close coherency.
793 * If the file isn't cached on local stable storage,
794 * it may be necessary in order to detect "out of space"
795 * errors from the server, if the write delegation
796 * issued by the server doesn't allow the file to grow.
800 nfs_close(struct vop_close_args *ap)
802 struct vnode *vp = ap->a_vp;
803 struct nfsnode *np = VTONFS(vp);
804 struct nfsvattr nfsva;
806 int error = 0, ret, localcred = 0;
807 int fmode = ap->a_fflag;
809 if (NFSCL_FORCEDISM(vp->v_mount))
812 * During shutdown, a_cred isn't valid, so just use root.
814 if (ap->a_cred == NOCRED) {
815 cred = newnfs_getcred();
820 if (vp->v_type == VREG) {
822 * Examine and clean dirty pages, regardless of NMODIFIED.
823 * This closes a major hole in close-to-open consistency.
824 * We want to push out all dirty pages (and buffers) on
825 * close, regardless of whether they were dirtied by
826 * mmap'ed writes or via write().
828 if (nfs_clean_pages_on_close && vp->v_object) {
829 VM_OBJECT_WLOCK(vp->v_object);
830 vm_object_page_clean(vp->v_object, 0, 0, 0);
831 VM_OBJECT_WUNLOCK(vp->v_object);
834 if (np->n_flag & NMODIFIED) {
838 * Under NFSv3 we have dirty buffers to dispose of. We
839 * must flush them to the NFS server. We have the option
840 * of waiting all the way through the commit rpc or just
841 * waiting for the initial write. The default is to only
842 * wait through the initial write so the data is in the
843 * server's cache, which is roughly similar to the state
844 * a standard disk subsystem leaves the file in on close().
846 * We cannot clear the NMODIFIED bit in np->n_flag due to
847 * potential races with other processes, and certainly
848 * cannot clear it if we don't commit.
849 * These races occur when there is no longer the old
850 * traditional vnode locking implemented for Vnode Ops.
852 int cm = newnfs_commit_on_close ? 1 : 0;
853 error = ncl_flush(vp, MNT_WAIT, ap->a_td, cm, 0);
854 /* np->n_flag &= ~NMODIFIED; */
855 } else if (NFS_ISV4(vp)) {
856 if (nfscl_mustflush(vp) != 0) {
857 int cm = newnfs_commit_on_close ? 1 : 0;
858 error = ncl_flush(vp, MNT_WAIT, ap->a_td,
861 * as above w.r.t races when clearing
863 * np->n_flag &= ~NMODIFIED;
867 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
872 * Invalidate the attribute cache in all cases.
873 * An open is going to fetch fresh attrs any way, other procs
874 * on this node that have file open will be forced to do an
875 * otw attr fetch, but this is safe.
876 * --> A user found that their RPC count dropped by 20% when
877 * this was commented out and I can't see any requirement
878 * for it, so I've disabled it when negative lookups are
879 * enabled. (What does this have to do with negative lookup
880 * caching? Well nothing, except it was reported by the
881 * same user that needed negative lookup caching and I wanted
882 * there to be a way to disable it to see if it
883 * is the cause of some caching/coherency issue that might
886 if (VFSTONFS(vp->v_mount)->nm_negnametimeo == 0) {
888 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
890 if (np->n_flag & NWRITEERR) {
891 np->n_flag &= ~NWRITEERR;
899 * Get attributes so "change" is up to date.
901 if (error == 0 && nfscl_mustflush(vp) != 0 &&
902 vp->v_type == VREG &&
903 (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOCTO) == 0) {
904 ret = nfsrpc_getattr(vp, cred, ap->a_td, &nfsva,
907 np->n_change = nfsva.na_filerev;
908 (void) nfscl_loadattrcache(&vp, &nfsva, NULL,
916 ret = nfsrpc_close(vp, 0, ap->a_td);
920 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
923 if (newnfs_directio_enable)
924 KASSERT((np->n_directio_asyncwr == 0),
925 ("nfs_close: dirty unflushed (%d) directio buffers\n",
926 np->n_directio_asyncwr));
927 if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) {
929 KASSERT((np->n_directio_opens > 0),
930 ("nfs_close: unexpectedly value (0) of n_directio_opens\n"));
931 np->n_directio_opens--;
932 if (np->n_directio_opens == 0)
933 np->n_flag &= ~NNONCACHE;
942 * nfs getattr call from vfs.
945 nfs_getattr(struct vop_getattr_args *ap)
947 struct vnode *vp = ap->a_vp;
948 struct thread *td = curthread; /* XXX */
949 struct nfsnode *np = VTONFS(vp);
951 struct nfsvattr nfsva;
952 struct vattr *vap = ap->a_vap;
956 * Update local times for special files.
959 if (np->n_flag & (NACC | NUPD))
963 * First look in the cache.
965 if (ncl_getattrcache(vp, &vattr) == 0) {
966 vap->va_type = vattr.va_type;
967 vap->va_mode = vattr.va_mode;
968 vap->va_nlink = vattr.va_nlink;
969 vap->va_uid = vattr.va_uid;
970 vap->va_gid = vattr.va_gid;
971 vap->va_fsid = vattr.va_fsid;
972 vap->va_fileid = vattr.va_fileid;
973 vap->va_size = vattr.va_size;
974 vap->va_blocksize = vattr.va_blocksize;
975 vap->va_atime = vattr.va_atime;
976 vap->va_mtime = vattr.va_mtime;
977 vap->va_ctime = vattr.va_ctime;
978 vap->va_gen = vattr.va_gen;
979 vap->va_flags = vattr.va_flags;
980 vap->va_rdev = vattr.va_rdev;
981 vap->va_bytes = vattr.va_bytes;
982 vap->va_filerev = vattr.va_filerev;
984 * Get the local modify time for the case of a write
987 nfscl_deleggetmodtime(vp, &vap->va_mtime);
991 if (NFS_ISV34(vp) && nfs_prime_access_cache &&
992 nfsaccess_cache_timeout > 0) {
993 NFSINCRGLOBAL(nfsstatsv1.accesscache_misses);
994 nfs34_access_otw(vp, NFSACCESS_ALL, td, ap->a_cred, NULL);
995 if (ncl_getattrcache(vp, ap->a_vap) == 0) {
996 nfscl_deleggetmodtime(vp, &ap->a_vap->va_mtime);
1000 error = nfsrpc_getattr(vp, ap->a_cred, td, &nfsva, NULL);
1002 error = nfscl_loadattrcache(&vp, &nfsva, vap, NULL, 0, 0);
1005 * Get the local modify time for the case of a write
1008 nfscl_deleggetmodtime(vp, &vap->va_mtime);
1009 } else if (NFS_ISV4(vp)) {
1010 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1019 nfs_setattr(struct vop_setattr_args *ap)
1021 struct vnode *vp = ap->a_vp;
1022 struct nfsnode *np = VTONFS(vp);
1023 struct thread *td = curthread; /* XXX */
1024 struct vattr *vap = ap->a_vap;
1029 tsize = (u_quad_t)0;
1033 * Setting of flags and marking of atimes are not supported.
1035 if (vap->va_flags != VNOVAL)
1036 return (EOPNOTSUPP);
1039 * Disallow write attempts if the filesystem is mounted read-only.
1041 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
1042 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
1043 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
1044 (vp->v_mount->mnt_flag & MNT_RDONLY))
1046 if (vap->va_size != VNOVAL) {
1047 switch (vp->v_type) {
1054 if (vap->va_mtime.tv_sec == VNOVAL &&
1055 vap->va_atime.tv_sec == VNOVAL &&
1056 vap->va_mode == (mode_t)VNOVAL &&
1057 vap->va_uid == (uid_t)VNOVAL &&
1058 vap->va_gid == (gid_t)VNOVAL)
1060 vap->va_size = VNOVAL;
1064 * Disallow write attempts if the filesystem is
1065 * mounted read-only.
1067 if (vp->v_mount->mnt_flag & MNT_RDONLY)
1070 * We run vnode_pager_setsize() early (why?),
1071 * we must set np->n_size now to avoid vinvalbuf
1072 * V_SAVE races that might setsize a lower
1078 error = ncl_meta_setsize(vp, td, vap->va_size);
1080 if (np->n_flag & NMODIFIED) {
1083 error = ncl_vinvalbuf(vp, vap->va_size == 0 ?
1086 vnode_pager_setsize(vp, tsize);
1090 * Call nfscl_delegmodtime() to set the modify time
1091 * locally, as required.
1093 nfscl_delegmodtime(vp);
1097 * np->n_size has already been set to vap->va_size
1098 * in ncl_meta_setsize(). We must set it again since
1099 * nfs_loadattrcache() could be called through
1100 * ncl_meta_setsize() and could modify np->n_size.
1103 np->n_vattr.na_size = np->n_size = vap->va_size;
1108 if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) &&
1109 (np->n_flag & NMODIFIED) && vp->v_type == VREG) {
1111 error = ncl_vinvalbuf(vp, V_SAVE, td, 1);
1112 if (error == EINTR || error == EIO)
1117 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
1118 if (error && vap->va_size != VNOVAL) {
1120 np->n_size = np->n_vattr.na_size = tsize;
1121 vnode_pager_setsize(vp, tsize);
1128 * Do an nfs setattr rpc.
1131 nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred,
1134 struct nfsnode *np = VTONFS(vp);
1135 int error, ret, attrflag, i;
1136 struct nfsvattr nfsva;
1138 if (NFS_ISV34(vp)) {
1140 for (i = 0; i < NFS_ACCESSCACHESIZE; i++)
1141 np->n_accesscache[i].stamp = 0;
1142 np->n_flag |= NDELEGMOD;
1144 KDTRACE_NFS_ACCESSCACHE_FLUSH_DONE(vp);
1146 error = nfsrpc_setattr(vp, vap, NULL, cred, td, &nfsva, &attrflag,
1149 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1153 if (error && NFS_ISV4(vp))
1154 error = nfscl_maperr(td, error, vap->va_uid, vap->va_gid);
1159 * nfs lookup call, one step at a time...
1160 * First look in cache
1161 * If not found, unlock the directory nfsnode and do the rpc
1164 nfs_lookup(struct vop_lookup_args *ap)
1166 struct componentname *cnp = ap->a_cnp;
1167 struct vnode *dvp = ap->a_dvp;
1168 struct vnode **vpp = ap->a_vpp;
1169 struct mount *mp = dvp->v_mount;
1170 int flags = cnp->cn_flags;
1171 struct vnode *newvp;
1172 struct nfsmount *nmp;
1173 struct nfsnode *np, *newnp;
1174 int error = 0, attrflag, dattrflag, ltype, ncticks;
1175 struct thread *td = cnp->cn_thread;
1177 struct nfsvattr dnfsva, nfsva;
1179 struct timespec nctime;
1182 if ((flags & ISLASTCN) && (mp->mnt_flag & MNT_RDONLY) &&
1183 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
1185 if (dvp->v_type != VDIR)
1190 /* For NFSv4, wait until any remove is done. */
1192 while (NFSHASNFSV4(nmp) && (np->n_flag & NREMOVEINPROG)) {
1193 np->n_flag |= NREMOVEWANT;
1194 (void) msleep((caddr_t)np, &np->n_mtx, PZERO, "nfslkup", 0);
1198 error = vn_dir_check_exec(dvp, cnp);
1201 error = cache_lookup(dvp, vpp, cnp, &nctime, &ncticks);
1202 if (error > 0 && error != ENOENT)
1206 * Lookups of "." are special and always return the
1207 * current directory. cache_lookup() already handles
1208 * associated locking bookkeeping, etc.
1210 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
1211 /* XXX: Is this really correct? */
1212 if (cnp->cn_nameiop != LOOKUP &&
1214 cnp->cn_flags |= SAVENAME;
1219 * We only accept a positive hit in the cache if the
1220 * change time of the file matches our cached copy.
1221 * Otherwise, we discard the cache entry and fallback
1222 * to doing a lookup RPC. We also only trust cache
1223 * entries for less than nm_nametimeo seconds.
1225 * To better handle stale file handles and attributes,
1226 * clear the attribute cache of this node if it is a
1227 * leaf component, part of an open() call, and not
1228 * locally modified before fetching the attributes.
1229 * This should allow stale file handles to be detected
1230 * here where we can fall back to a LOOKUP RPC to
1231 * recover rather than having nfs_open() detect the
1232 * stale file handle and failing open(2) with ESTALE.
1235 newnp = VTONFS(newvp);
1236 if (!(nmp->nm_flag & NFSMNT_NOCTO) &&
1237 (flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) &&
1238 !(newnp->n_flag & NMODIFIED)) {
1240 newnp->n_attrstamp = 0;
1241 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp);
1242 NFSUNLOCKNODE(newnp);
1244 if (nfscl_nodeleg(newvp, 0) == 0 ||
1245 ((u_int)(ticks - ncticks) < (nmp->nm_nametimeo * hz) &&
1246 VOP_GETATTR(newvp, &vattr, cnp->cn_cred) == 0 &&
1247 timespeccmp(&vattr.va_ctime, &nctime, ==))) {
1248 NFSINCRGLOBAL(nfsstatsv1.lookupcache_hits);
1249 if (cnp->cn_nameiop != LOOKUP &&
1251 cnp->cn_flags |= SAVENAME;
1260 } else if (error == ENOENT) {
1261 if (VN_IS_DOOMED(dvp))
1264 * We only accept a negative hit in the cache if the
1265 * modification time of the parent directory matches
1266 * the cached copy in the name cache entry.
1267 * Otherwise, we discard all of the negative cache
1268 * entries for this directory. We also only trust
1269 * negative cache entries for up to nm_negnametimeo
1272 if ((u_int)(ticks - ncticks) < (nmp->nm_negnametimeo * hz) &&
1273 VOP_GETATTR(dvp, &vattr, cnp->cn_cred) == 0 &&
1274 timespeccmp(&vattr.va_mtime, &nctime, ==)) {
1275 NFSINCRGLOBAL(nfsstatsv1.lookupcache_hits);
1278 cache_purge_negative(dvp);
1282 NFSINCRGLOBAL(nfsstatsv1.lookupcache_misses);
1283 error = nfsrpc_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1284 cnp->cn_cred, td, &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1287 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1289 if (newvp != NULLVP) {
1294 if (error != ENOENT) {
1296 error = nfscl_maperr(td, error, (uid_t)0,
1301 /* The requested file was not found. */
1302 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
1303 (flags & ISLASTCN)) {
1305 * XXX: UFS does a full VOP_ACCESS(dvp,
1306 * VWRITE) here instead of just checking
1309 if (mp->mnt_flag & MNT_RDONLY)
1311 cnp->cn_flags |= SAVENAME;
1312 return (EJUSTRETURN);
1315 if ((cnp->cn_flags & MAKEENTRY) != 0 && dattrflag) {
1317 * Cache the modification time of the parent
1318 * directory from the post-op attributes in
1319 * the name cache entry. The negative cache
1320 * entry will be ignored once the directory
1321 * has changed. Don't bother adding the entry
1322 * if the directory has already changed.
1325 if (timespeccmp(&np->n_vattr.na_mtime,
1326 &dnfsva.na_mtime, ==)) {
1328 cache_enter_time(dvp, NULL, cnp,
1329 &dnfsva.na_mtime, NULL);
1337 * Handle RENAME case...
1339 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) {
1340 if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
1341 free(nfhp, M_NFSFH);
1344 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL,
1350 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1353 cnp->cn_flags |= SAVENAME;
1357 if (flags & ISDOTDOT) {
1358 ltype = NFSVOPISLOCKED(dvp);
1359 error = vfs_busy(mp, MBF_NOWAIT);
1363 error = vfs_busy(mp, 0);
1364 NFSVOPLOCK(dvp, ltype | LK_RETRY);
1366 if (error == 0 && VN_IS_DOOMED(dvp)) {
1374 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL,
1380 NFSVOPLOCK(dvp, ltype | LK_RETRY);
1381 if (VN_IS_DOOMED(dvp)) {
1393 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1395 } else if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
1396 free(nfhp, M_NFSFH);
1400 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1403 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL,
1409 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1411 else if ((flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) &&
1412 !(np->n_flag & NMODIFIED)) {
1414 * Flush the attribute cache when opening a
1415 * leaf node to ensure that fresh attributes
1416 * are fetched in nfs_open() since we did not
1417 * fetch attributes from the LOOKUP reply.
1420 np->n_attrstamp = 0;
1421 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp);
1425 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
1426 cnp->cn_flags |= SAVENAME;
1427 if ((cnp->cn_flags & MAKEENTRY) &&
1428 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN)) &&
1429 attrflag != 0 && (newvp->v_type != VDIR || dattrflag != 0))
1430 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime,
1431 newvp->v_type != VDIR ? NULL : &dnfsva.na_ctime);
1438 * Just call ncl_bioread() to do the work.
1441 nfs_read(struct vop_read_args *ap)
1443 struct vnode *vp = ap->a_vp;
1445 switch (vp->v_type) {
1447 return (ncl_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
1451 return (EOPNOTSUPP);
1459 nfs_readlink(struct vop_readlink_args *ap)
1461 struct vnode *vp = ap->a_vp;
1463 if (vp->v_type != VLNK)
1465 return (ncl_bioread(vp, ap->a_uio, 0, ap->a_cred));
1469 * Do a readlink rpc.
1470 * Called by ncl_doio() from below the buffer cache.
1473 ncl_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1475 int error, ret, attrflag;
1476 struct nfsvattr nfsva;
1478 error = nfsrpc_readlink(vp, uiop, cred, uiop->uio_td, &nfsva,
1481 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1485 if (error && NFS_ISV4(vp))
1486 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1495 ncl_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1497 int error, ret, attrflag;
1498 struct nfsvattr nfsva;
1499 struct nfsmount *nmp;
1501 nmp = VFSTONFS(vnode_mount(vp));
1504 if (NFSHASPNFS(nmp))
1505 error = nfscl_doiods(vp, uiop, NULL, NULL,
1506 NFSV4OPEN_ACCESSREAD, 0, cred, uiop->uio_td);
1507 NFSCL_DEBUG(4, "readrpc: aft doiods=%d\n", error);
1509 error = nfsrpc_read(vp, uiop, cred, uiop->uio_td, &nfsva,
1512 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1516 if (error && NFS_ISV4(vp))
1517 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1525 ncl_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
1526 int *iomode, int *must_commit, int called_from_strategy)
1528 struct nfsvattr nfsva;
1529 int error, attrflag, ret;
1530 struct nfsmount *nmp;
1532 nmp = VFSTONFS(vnode_mount(vp));
1535 if (NFSHASPNFS(nmp))
1536 error = nfscl_doiods(vp, uiop, iomode, must_commit,
1537 NFSV4OPEN_ACCESSWRITE, 0, cred, uiop->uio_td);
1538 NFSCL_DEBUG(4, "writerpc: aft doiods=%d\n", error);
1540 error = nfsrpc_write(vp, uiop, iomode, must_commit, cred,
1541 uiop->uio_td, &nfsva, &attrflag, NULL,
1542 called_from_strategy);
1544 if (VTONFS(vp)->n_flag & ND_NFSV4)
1545 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 1,
1548 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
1554 *iomode = NFSWRITE_FILESYNC;
1555 if (error && NFS_ISV4(vp))
1556 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1562 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1563 * mode set to specify the file type and the size field for rdev.
1566 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1569 struct nfsvattr nfsva, dnfsva;
1570 struct vnode *newvp = NULL;
1571 struct nfsnode *np = NULL, *dnp;
1574 int error = 0, attrflag, dattrflag;
1577 if (vap->va_type == VCHR || vap->va_type == VBLK)
1578 rdev = vap->va_rdev;
1579 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1582 return (EOPNOTSUPP);
1583 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1585 error = nfsrpc_mknod(dvp, cnp->cn_nameptr, cnp->cn_namelen, vap,
1586 rdev, vap->va_type, cnp->cn_cred, cnp->cn_thread, &dnfsva,
1587 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
1590 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1591 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1592 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1595 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1596 cnp->cn_thread, &np, NULL, LK_EXCLUSIVE);
1599 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1602 if (attrflag != 0) {
1603 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1611 } else if (NFS_ISV4(dvp)) {
1612 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1617 dnp->n_flag |= NMODIFIED;
1619 dnp->n_attrstamp = 0;
1620 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1628 * just call nfs_mknodrpc() to do the work.
1632 nfs_mknod(struct vop_mknod_args *ap)
1634 return (nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap));
1637 static struct mtx nfs_cverf_mtx;
1638 MTX_SYSINIT(nfs_cverf_mtx, &nfs_cverf_mtx, "NFS create verifier mutex",
1644 static nfsquad_t cverf;
1646 static int cverf_initialized = 0;
1648 mtx_lock(&nfs_cverf_mtx);
1649 if (cverf_initialized == 0) {
1650 cverf.lval[0] = arc4random();
1651 cverf.lval[1] = arc4random();
1652 cverf_initialized = 1;
1656 mtx_unlock(&nfs_cverf_mtx);
1662 * nfs file create call
1665 nfs_create(struct vop_create_args *ap)
1667 struct vnode *dvp = ap->a_dvp;
1668 struct vattr *vap = ap->a_vap;
1669 struct componentname *cnp = ap->a_cnp;
1670 struct nfsnode *np = NULL, *dnp;
1671 struct vnode *newvp = NULL;
1672 struct nfsmount *nmp;
1673 struct nfsvattr dnfsva, nfsva;
1676 int error = 0, attrflag, dattrflag, fmode = 0;
1680 * Oops, not for me..
1682 if (vap->va_type == VSOCK)
1683 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1685 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1687 if (vap->va_vaflags & VA_EXCLUSIVE)
1690 nmp = VFSTONFS(vnode_mount(dvp));
1692 /* For NFSv4, wait until any remove is done. */
1694 while (NFSHASNFSV4(nmp) && (dnp->n_flag & NREMOVEINPROG)) {
1695 dnp->n_flag |= NREMOVEWANT;
1696 (void) msleep((caddr_t)dnp, &dnp->n_mtx, PZERO, "nfscrt", 0);
1700 cverf = nfs_get_cverf();
1701 error = nfsrpc_create(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1702 vap, cverf, fmode, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva,
1703 &nfhp, &attrflag, &dattrflag, NULL);
1706 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1707 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1708 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1711 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1712 cnp->cn_thread, &np, NULL, LK_EXCLUSIVE);
1715 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1719 error = nfsrpc_getattr(newvp, cnp->cn_cred,
1720 cnp->cn_thread, &nfsva, NULL);
1722 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1726 if (newvp != NULL) {
1730 if (NFS_ISV34(dvp) && (fmode & O_EXCL) &&
1731 error == NFSERR_NOTSUPP) {
1735 } else if (NFS_ISV34(dvp) && (fmode & O_EXCL)) {
1736 if (nfscl_checksattr(vap, &nfsva)) {
1737 error = nfsrpc_setattr(newvp, vap, NULL, cnp->cn_cred,
1738 cnp->cn_thread, &nfsva, &attrflag, NULL);
1739 if (error && (vap->va_uid != (uid_t)VNOVAL ||
1740 vap->va_gid != (gid_t)VNOVAL)) {
1741 /* try again without setting uid/gid */
1742 vap->va_uid = (uid_t)VNOVAL;
1743 vap->va_gid = (uid_t)VNOVAL;
1744 error = nfsrpc_setattr(newvp, vap, NULL,
1745 cnp->cn_cred, cnp->cn_thread, &nfsva,
1749 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
1756 if ((cnp->cn_flags & MAKEENTRY) && attrflag)
1757 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime,
1760 } else if (NFS_ISV4(dvp)) {
1761 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1765 dnp->n_flag |= NMODIFIED;
1767 dnp->n_attrstamp = 0;
1768 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1775 * nfs file remove call
1776 * To try and make nfs semantics closer to ufs semantics, a file that has
1777 * other processes using the vnode is renamed instead of removed and then
1778 * removed later on the last close.
1779 * - If v_usecount > 1
1780 * If a rename is not already in the works
1781 * call nfs_sillyrename() to set it up
1786 nfs_remove(struct vop_remove_args *ap)
1788 struct vnode *vp = ap->a_vp;
1789 struct vnode *dvp = ap->a_dvp;
1790 struct componentname *cnp = ap->a_cnp;
1791 struct nfsnode *np = VTONFS(vp);
1795 KASSERT((cnp->cn_flags & HASBUF) != 0, ("nfs_remove: no name"));
1796 KASSERT(vrefcnt(vp) > 0, ("nfs_remove: bad v_usecount"));
1797 if (vp->v_type == VDIR)
1799 else if (vrefcnt(vp) == 1 || (np->n_sillyrename &&
1800 VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 &&
1801 vattr.va_nlink > 1)) {
1803 * Purge the name cache so that the chance of a lookup for
1804 * the name succeeding while the remove is in progress is
1805 * minimized. Without node locking it can still happen, such
1806 * that an I/O op returns ESTALE, but since you get this if
1807 * another host removes the file..
1811 * throw away biocache buffers, mainly to avoid
1812 * unnecessary delayed writes later.
1814 error = ncl_vinvalbuf(vp, 0, cnp->cn_thread, 1);
1815 if (error != EINTR && error != EIO)
1817 error = nfs_removerpc(dvp, vp, cnp->cn_nameptr,
1818 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread);
1820 * Kludge City: If the first reply to the remove rpc is lost..
1821 * the reply to the retransmitted request will be ENOENT
1822 * since the file was in fact removed
1823 * Therefore, we cheat and return success.
1825 if (error == ENOENT)
1827 } else if (!np->n_sillyrename)
1828 error = nfs_sillyrename(dvp, vp, cnp);
1830 np->n_attrstamp = 0;
1832 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
1837 * nfs file remove rpc called from nfs_inactive
1840 ncl_removeit(struct sillyrename *sp, struct vnode *vp)
1843 * Make sure that the directory vnode is still valid.
1844 * XXX we should lock sp->s_dvp here.
1846 if (sp->s_dvp->v_type == VBAD)
1848 return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen,
1853 * Nfs remove rpc, called from nfs_remove() and ncl_removeit().
1856 nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
1857 int namelen, struct ucred *cred, struct thread *td)
1859 struct nfsvattr dnfsva;
1860 struct nfsnode *dnp = VTONFS(dvp);
1861 int error = 0, dattrflag;
1864 dnp->n_flag |= NREMOVEINPROG;
1866 error = nfsrpc_remove(dvp, name, namelen, vp, cred, td, &dnfsva,
1869 if ((dnp->n_flag & NREMOVEWANT)) {
1870 dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG);
1872 wakeup((caddr_t)dnp);
1874 dnp->n_flag &= ~NREMOVEINPROG;
1878 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1880 dnp->n_flag |= NMODIFIED;
1882 dnp->n_attrstamp = 0;
1883 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1886 if (error && NFS_ISV4(dvp))
1887 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1892 * nfs file rename call
1895 nfs_rename(struct vop_rename_args *ap)
1897 struct vnode *fvp = ap->a_fvp;
1898 struct vnode *tvp = ap->a_tvp;
1899 struct vnode *fdvp = ap->a_fdvp;
1900 struct vnode *tdvp = ap->a_tdvp;
1901 struct componentname *tcnp = ap->a_tcnp;
1902 struct componentname *fcnp = ap->a_fcnp;
1903 struct nfsnode *fnp = VTONFS(ap->a_fvp);
1904 struct nfsnode *tdnp = VTONFS(ap->a_tdvp);
1905 struct nfsv4node *newv4 = NULL;
1908 KASSERT((tcnp->cn_flags & HASBUF) != 0 &&
1909 (fcnp->cn_flags & HASBUF) != 0, ("nfs_rename: no name"));
1910 /* Check for cross-device rename */
1911 if ((fvp->v_mount != tdvp->v_mount) ||
1912 (tvp && (fvp->v_mount != tvp->v_mount))) {
1918 printf("nfs_rename: fvp == tvp (can't happen)\n");
1922 if ((error = NFSVOPLOCK(fvp, LK_EXCLUSIVE)) != 0)
1926 * We have to flush B_DELWRI data prior to renaming
1927 * the file. If we don't, the delayed-write buffers
1928 * can be flushed out later after the file has gone stale
1929 * under NFSV3. NFSV2 does not have this problem because
1930 * ( as far as I can tell ) it flushes dirty buffers more
1933 * Skip the rename operation if the fsync fails, this can happen
1934 * due to the server's volume being full, when we pushed out data
1935 * that was written back to our cache earlier. Not checking for
1936 * this condition can result in potential (silent) data loss.
1938 error = VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_thread);
1941 error = VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_thread);
1946 * If the tvp exists and is in use, sillyrename it before doing the
1947 * rename of the new file over it.
1948 * XXX Can't sillyrename a directory.
1950 if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename &&
1951 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1956 error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1957 tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1960 if (error == 0 && NFS_ISV4(tdvp)) {
1962 * For NFSv4, check to see if it is the same name and
1963 * replace the name, if it is different.
1966 sizeof (struct nfsv4node) +
1967 tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1,
1968 M_NFSV4NODE, M_WAITOK);
1971 if (fnp->n_v4 != NULL && fvp->v_type == VREG &&
1972 (fnp->n_v4->n4_namelen != tcnp->cn_namelen ||
1973 NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4),
1974 tcnp->cn_namelen) ||
1975 tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen ||
1976 NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1977 tdnp->n_fhp->nfh_len))) {
1979 { char nnn[100]; int nnnl;
1980 nnnl = (tcnp->cn_namelen < 100) ? tcnp->cn_namelen : 99;
1981 bcopy(tcnp->cn_nameptr, nnn, nnnl);
1983 printf("ren replace=%s\n",nnn);
1986 free(fnp->n_v4, M_NFSV4NODE);
1989 fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len;
1990 fnp->n_v4->n4_namelen = tcnp->cn_namelen;
1991 NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1992 tdnp->n_fhp->nfh_len);
1993 NFSBCOPY(tcnp->cn_nameptr,
1994 NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen);
1996 NFSUNLOCKNODE(tdnp);
1999 free(newv4, M_NFSV4NODE);
2002 if (fvp->v_type == VDIR) {
2003 if (tvp != NULL && tvp->v_type == VDIR)
2018 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
2020 if (error == ENOENT)
2026 * nfs file rename rpc called from nfs_remove() above
2029 nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp,
2030 struct sillyrename *sp)
2033 return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen,
2034 sdvp, NULL, sp->s_name, sp->s_namlen, scnp->cn_cred,
2039 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
2042 nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr,
2043 int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr,
2044 int tnamelen, struct ucred *cred, struct thread *td)
2046 struct nfsvattr fnfsva, tnfsva;
2047 struct nfsnode *fdnp = VTONFS(fdvp);
2048 struct nfsnode *tdnp = VTONFS(tdvp);
2049 int error = 0, fattrflag, tattrflag;
2051 error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp,
2052 tnameptr, tnamelen, cred, td, &fnfsva, &tnfsva, &fattrflag,
2053 &tattrflag, NULL, NULL);
2055 fdnp->n_flag |= NMODIFIED;
2056 if (fattrflag != 0) {
2057 NFSUNLOCKNODE(fdnp);
2058 (void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, NULL, 0, 1);
2060 fdnp->n_attrstamp = 0;
2061 NFSUNLOCKNODE(fdnp);
2062 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(fdvp);
2065 tdnp->n_flag |= NMODIFIED;
2066 if (tattrflag != 0) {
2067 NFSUNLOCKNODE(tdnp);
2068 (void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, NULL, 0, 1);
2070 tdnp->n_attrstamp = 0;
2071 NFSUNLOCKNODE(tdnp);
2072 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
2074 if (error && NFS_ISV4(fdvp))
2075 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2080 * nfs hard link create call
2083 nfs_link(struct vop_link_args *ap)
2085 struct vnode *vp = ap->a_vp;
2086 struct vnode *tdvp = ap->a_tdvp;
2087 struct componentname *cnp = ap->a_cnp;
2088 struct nfsnode *np, *tdnp;
2089 struct nfsvattr nfsva, dnfsva;
2090 int error = 0, attrflag, dattrflag;
2093 * Push all writes to the server, so that the attribute cache
2094 * doesn't get "out of sync" with the server.
2095 * XXX There should be a better way!
2097 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_thread);
2099 error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen,
2100 cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &attrflag,
2102 tdnp = VTONFS(tdvp);
2104 tdnp->n_flag |= NMODIFIED;
2105 if (dattrflag != 0) {
2106 NFSUNLOCKNODE(tdnp);
2107 (void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, NULL, 0, 1);
2109 tdnp->n_attrstamp = 0;
2110 NFSUNLOCKNODE(tdnp);
2111 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
2114 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2118 np->n_attrstamp = 0;
2120 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
2123 * If negative lookup caching is enabled, I might as well
2124 * add an entry for this node. Not necessary for correctness,
2125 * but if negative caching is enabled, then the system
2126 * must care about lookup caching hit rate, so...
2128 if (VFSTONFS(vp->v_mount)->nm_negnametimeo != 0 &&
2129 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) {
2130 cache_enter_time(tdvp, vp, cnp, &nfsva.na_ctime, NULL);
2132 if (error && NFS_ISV4(vp))
2133 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
2139 * nfs symbolic link create call
2142 nfs_symlink(struct vop_symlink_args *ap)
2144 struct vnode *dvp = ap->a_dvp;
2145 struct vattr *vap = ap->a_vap;
2146 struct componentname *cnp = ap->a_cnp;
2147 struct nfsvattr nfsva, dnfsva;
2149 struct nfsnode *np = NULL, *dnp;
2150 struct vnode *newvp = NULL;
2151 int error = 0, attrflag, dattrflag, ret;
2153 vap->va_type = VLNK;
2154 error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2155 ap->a_target, vap, cnp->cn_cred, cnp->cn_thread, &dnfsva,
2156 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
2158 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
2159 &np, NULL, LK_EXCLUSIVE);
2165 if (newvp != NULL) {
2167 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2169 } else if (!error) {
2171 * If we do not have an error and we could not extract the
2172 * newvp from the response due to the request being NFSv2, we
2173 * have to do a lookup in order to obtain a newvp to return.
2175 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2176 cnp->cn_cred, cnp->cn_thread, &np);
2184 error = nfscl_maperr(cnp->cn_thread, error,
2185 vap->va_uid, vap->va_gid);
2192 dnp->n_flag |= NMODIFIED;
2193 if (dattrflag != 0) {
2195 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2197 dnp->n_attrstamp = 0;
2199 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2202 * If negative lookup caching is enabled, I might as well
2203 * add an entry for this node. Not necessary for correctness,
2204 * but if negative caching is enabled, then the system
2205 * must care about lookup caching hit rate, so...
2207 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
2208 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) {
2209 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime, NULL);
2218 nfs_mkdir(struct vop_mkdir_args *ap)
2220 struct vnode *dvp = ap->a_dvp;
2221 struct vattr *vap = ap->a_vap;
2222 struct componentname *cnp = ap->a_cnp;
2223 struct nfsnode *np = NULL, *dnp;
2224 struct vnode *newvp = NULL;
2227 struct nfsvattr nfsva, dnfsva;
2228 int error = 0, attrflag, dattrflag, ret;
2230 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0)
2232 vap->va_type = VDIR;
2233 error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2234 vap, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &nfhp,
2235 &attrflag, &dattrflag, NULL);
2238 dnp->n_flag |= NMODIFIED;
2239 if (dattrflag != 0) {
2241 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2243 dnp->n_attrstamp = 0;
2245 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2248 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
2249 &np, NULL, LK_EXCLUSIVE);
2253 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
2258 if (!error && newvp == NULL) {
2259 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2260 cnp->cn_cred, cnp->cn_thread, &np);
2263 if (newvp->v_type != VDIR)
2271 error = nfscl_maperr(cnp->cn_thread, error,
2272 vap->va_uid, vap->va_gid);
2275 * If negative lookup caching is enabled, I might as well
2276 * add an entry for this node. Not necessary for correctness,
2277 * but if negative caching is enabled, then the system
2278 * must care about lookup caching hit rate, so...
2280 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
2281 (cnp->cn_flags & MAKEENTRY) &&
2282 attrflag != 0 && dattrflag != 0)
2283 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime,
2291 * nfs remove directory call
2294 nfs_rmdir(struct vop_rmdir_args *ap)
2296 struct vnode *vp = ap->a_vp;
2297 struct vnode *dvp = ap->a_dvp;
2298 struct componentname *cnp = ap->a_cnp;
2299 struct nfsnode *dnp;
2300 struct nfsvattr dnfsva;
2301 int error, dattrflag;
2305 error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2306 cnp->cn_cred, cnp->cn_thread, &dnfsva, &dattrflag, NULL);
2309 dnp->n_flag |= NMODIFIED;
2310 if (dattrflag != 0) {
2312 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2314 dnp->n_attrstamp = 0;
2316 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2321 if (error && NFS_ISV4(dvp))
2322 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
2325 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2327 if (error == ENOENT)
2336 nfs_readdir(struct vop_readdir_args *ap)
2338 struct vnode *vp = ap->a_vp;
2339 struct nfsnode *np = VTONFS(vp);
2340 struct uio *uio = ap->a_uio;
2341 ssize_t tresid, left;
2345 if (ap->a_eofflag != NULL)
2347 if (vp->v_type != VDIR)
2351 * First, check for hit on the EOF offset cache
2353 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2354 (np->n_flag & NMODIFIED) == 0) {
2355 if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) {
2357 if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) ||
2358 !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
2360 NFSINCRGLOBAL(nfsstatsv1.direofcache_hits);
2361 if (ap->a_eofflag != NULL)
2370 * NFS always guarantees that directory entries don't straddle
2371 * DIRBLKSIZ boundaries. As such, we need to limit the size
2372 * to an exact multiple of DIRBLKSIZ, to avoid copying a partial
2375 left = uio->uio_resid % DIRBLKSIZ;
2376 if (left == uio->uio_resid)
2378 uio->uio_resid -= left;
2381 * Call ncl_bioread() to do the real work.
2383 tresid = uio->uio_resid;
2384 error = ncl_bioread(vp, uio, 0, ap->a_cred);
2386 if (!error && uio->uio_resid == tresid) {
2387 NFSINCRGLOBAL(nfsstatsv1.direofcache_misses);
2388 if (ap->a_eofflag != NULL)
2392 /* Add the partial DIRBLKSIZ (left) back in. */
2393 uio->uio_resid += left;
2399 * Called from below the buffer cache by ncl_doio().
2402 ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2405 struct nfsvattr nfsva;
2406 nfsuint64 *cookiep, cookie;
2407 struct nfsnode *dnp = VTONFS(vp);
2408 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2409 int error = 0, eof, attrflag;
2411 KASSERT(uiop->uio_iovcnt == 1 &&
2412 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
2413 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
2414 ("nfs readdirrpc bad uio"));
2417 * If there is no cookie, assume directory was stale.
2419 ncl_dircookie_lock(dnp);
2420 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2423 ncl_dircookie_unlock(dnp);
2425 ncl_dircookie_unlock(dnp);
2426 return (NFSERR_BAD_COOKIE);
2429 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2430 (void)ncl_fsinfo(nmp, vp, cred, td);
2432 error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva,
2433 &attrflag, &eof, NULL);
2435 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2439 * We are now either at the end of the directory or have filled
2443 dnp->n_direofoffset = uiop->uio_offset;
2445 if (uiop->uio_resid > 0)
2446 printf("EEK! readdirrpc resid > 0\n");
2447 ncl_dircookie_lock(dnp);
2448 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2450 ncl_dircookie_unlock(dnp);
2452 } else if (NFS_ISV4(vp)) {
2453 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2459 * NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc().
2462 ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2465 struct nfsvattr nfsva;
2466 nfsuint64 *cookiep, cookie;
2467 struct nfsnode *dnp = VTONFS(vp);
2468 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2469 int error = 0, attrflag, eof;
2471 KASSERT(uiop->uio_iovcnt == 1 &&
2472 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
2473 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
2474 ("nfs readdirplusrpc bad uio"));
2477 * If there is no cookie, assume directory was stale.
2479 ncl_dircookie_lock(dnp);
2480 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2483 ncl_dircookie_unlock(dnp);
2485 ncl_dircookie_unlock(dnp);
2486 return (NFSERR_BAD_COOKIE);
2489 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2490 (void)ncl_fsinfo(nmp, vp, cred, td);
2491 error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva,
2492 &attrflag, &eof, NULL);
2494 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2498 * We are now either at end of the directory or have filled the
2502 dnp->n_direofoffset = uiop->uio_offset;
2504 if (uiop->uio_resid > 0)
2505 printf("EEK! readdirplusrpc resid > 0\n");
2506 ncl_dircookie_lock(dnp);
2507 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2509 ncl_dircookie_unlock(dnp);
2511 } else if (NFS_ISV4(vp)) {
2512 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2518 * Silly rename. To make the NFS filesystem that is stateless look a little
2519 * more like the "ufs" a remove of an active vnode is translated to a rename
2520 * to a funny looking filename that is removed by nfs_inactive on the
2521 * nfsnode. There is the potential for another process on a different client
2522 * to create the same funny name between the nfs_lookitup() fails and the
2523 * nfs_rename() completes, but...
2526 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2528 struct sillyrename *sp;
2532 unsigned int lticks;
2536 KASSERT(vp->v_type != VDIR, ("nfs: sillyrename dir"));
2537 sp = malloc(sizeof (struct sillyrename),
2538 M_NEWNFSREQ, M_WAITOK);
2539 sp->s_cred = crhold(cnp->cn_cred);
2544 * Fudge together a funny name.
2545 * Changing the format of the funny name to accommodate more
2546 * sillynames per directory.
2547 * The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is
2548 * CPU ticks since boot.
2550 pid = cnp->cn_thread->td_proc->p_pid;
2551 lticks = (unsigned int)ticks;
2553 sp->s_namlen = sprintf(sp->s_name,
2554 ".nfs.%08x.%04x4.4", lticks,
2556 if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2557 cnp->cn_thread, NULL))
2561 error = nfs_renameit(dvp, vp, cnp, sp);
2564 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2565 cnp->cn_thread, &np);
2566 np->n_sillyrename = sp;
2571 free(sp, M_NEWNFSREQ);
2576 * Look up a file name and optionally either update the file handle or
2577 * allocate an nfsnode, depending on the value of npp.
2578 * npp == NULL --> just do the lookup
2579 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2581 * *npp != NULL --> update the file handle in the vnode
2584 nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred,
2585 struct thread *td, struct nfsnode **npp)
2587 struct vnode *newvp = NULL, *vp;
2588 struct nfsnode *np, *dnp = VTONFS(dvp);
2589 struct nfsfh *nfhp, *onfhp;
2590 struct nfsvattr nfsva, dnfsva;
2591 struct componentname cn;
2592 int error = 0, attrflag, dattrflag;
2595 error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva,
2596 &nfhp, &attrflag, &dattrflag, NULL);
2598 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2599 if (npp && !error) {
2604 * For NFSv4, check to see if it is the same name and
2605 * replace the name, if it is different.
2607 if (np->n_v4 != NULL && nfsva.na_type == VREG &&
2608 (np->n_v4->n4_namelen != len ||
2609 NFSBCMP(name, NFS4NODENAME(np->n_v4), len) ||
2610 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
2611 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2612 dnp->n_fhp->nfh_len))) {
2614 { char nnn[100]; int nnnl;
2615 nnnl = (len < 100) ? len : 99;
2616 bcopy(name, nnn, nnnl);
2618 printf("replace=%s\n",nnn);
2621 free(np->n_v4, M_NFSV4NODE);
2623 sizeof (struct nfsv4node) +
2624 dnp->n_fhp->nfh_len + len - 1,
2625 M_NFSV4NODE, M_WAITOK);
2626 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
2627 np->n_v4->n4_namelen = len;
2628 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2629 dnp->n_fhp->nfh_len);
2630 NFSBCOPY(name, NFS4NODENAME(np->n_v4), len);
2632 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len,
2636 * Rehash node for new file handle.
2638 vfs_hash_rehash(vp, hash);
2641 free(onfhp, M_NFSFH);
2643 } else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) {
2644 free(nfhp, M_NFSFH);
2648 cn.cn_nameptr = name;
2649 cn.cn_namelen = len;
2650 error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td,
2651 &np, NULL, LK_EXCLUSIVE);
2656 if (!attrflag && *npp == NULL) {
2664 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2667 if (npp && *npp == NULL) {
2678 if (error && NFS_ISV4(dvp))
2679 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2684 * Nfs Version 3 and 4 commit rpc
2687 ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred,
2690 struct nfsvattr nfsva;
2691 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2694 int error, attrflag;
2699 if (NFSHASPNFS(nmp) && (np->n_flag & NDSCOMMIT) != 0) {
2700 uio.uio_offset = offset;
2701 uio.uio_resid = cnt;
2702 error = nfscl_doiods(vp, &uio, NULL, NULL,
2703 NFSV4OPEN_ACCESSWRITE, 1, cred, td);
2706 np->n_flag &= ~NDSCOMMIT;
2711 mtx_lock(&nmp->nm_mtx);
2712 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) {
2713 mtx_unlock(&nmp->nm_mtx);
2716 mtx_unlock(&nmp->nm_mtx);
2717 error = nfsrpc_commit(vp, offset, cnt, cred, td, &nfsva,
2721 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL,
2723 if (error != 0 && NFS_ISV4(vp))
2724 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2730 * For async requests when nfsiod(s) are running, queue the request by
2731 * calling ncl_asyncio(), otherwise just all ncl_doio() to do the
2735 nfs_strategy(struct vop_strategy_args *ap)
2743 KASSERT(bp->b_vp == vp, ("missing b_getvp"));
2744 KASSERT(!(bp->b_flags & B_DONE),
2745 ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2747 if (vp->v_type == VREG && bp->b_blkno == bp->b_lblkno)
2748 bp->b_blkno = bp->b_lblkno * (vp->v_bufobj.bo_bsize /
2750 if (bp->b_iocmd == BIO_READ)
2756 * If the op is asynchronous and an i/o daemon is waiting
2757 * queue the request, wake it up and wait for completion
2758 * otherwise just do it ourselves.
2760 if ((bp->b_flags & B_ASYNC) == 0 ||
2761 ncl_asyncio(VFSTONFS(vp->v_mount), bp, NOCRED, curthread))
2762 (void) ncl_doio(vp, bp, cr, curthread, 1);
2767 * fsync vnode op. Just call ncl_flush() with commit == 1.
2771 nfs_fsync(struct vop_fsync_args *ap)
2774 if (ap->a_vp->v_type != VREG) {
2776 * For NFS, metadata is changed synchronously on the server,
2777 * so there is nothing to flush. Also, ncl_flush() clears
2778 * the NMODIFIED flag and that shouldn't be done here for
2783 return (ncl_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1, 0));
2787 * Flush all the blocks associated with a vnode.
2788 * Walk through the buffer pool and push any dirty pages
2789 * associated with the vnode.
2790 * If the called_from_renewthread argument is TRUE, it has been called
2791 * from the NFSv4 renew thread and, as such, cannot block indefinitely
2792 * waiting for a buffer write to complete.
2795 ncl_flush(struct vnode *vp, int waitfor, struct thread *td,
2796 int commit, int called_from_renewthread)
2798 struct nfsnode *np = VTONFS(vp);
2802 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2803 int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2804 int passone = 1, trycnt = 0;
2805 u_quad_t off, endoff, toff;
2806 struct ucred* wcred = NULL;
2807 struct buf **bvec = NULL;
2809 #ifndef NFS_COMMITBVECSIZ
2810 #define NFS_COMMITBVECSIZ 20
2812 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2813 u_int bvecsize = 0, bveccount;
2815 if (called_from_renewthread != 0)
2817 if (nmp->nm_flag & NFSMNT_INT)
2823 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2824 * server, but has not been committed to stable storage on the server
2825 * yet. On the first pass, the byte range is worked out and the commit
2826 * rpc is done. On the second pass, ncl_writebp() is called to do the
2833 if (NFS_ISV34(vp) && commit) {
2834 if (bvec != NULL && bvec != bvec_on_stack)
2837 * Count up how many buffers waiting for a commit.
2841 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2842 if (!BUF_ISLOCKED(bp) &&
2843 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2844 == (B_DELWRI | B_NEEDCOMMIT))
2848 * Allocate space to remember the list of bufs to commit. It is
2849 * important to use M_NOWAIT here to avoid a race with nfs_write.
2850 * If we can't get memory (for whatever reason), we will end up
2851 * committing the buffers one-by-one in the loop below.
2853 if (bveccount > NFS_COMMITBVECSIZ) {
2855 * Release the vnode interlock to avoid a lock
2859 bvec = (struct buf **)
2860 malloc(bveccount * sizeof(struct buf *),
2864 bvec = bvec_on_stack;
2865 bvecsize = NFS_COMMITBVECSIZ;
2867 bvecsize = bveccount;
2869 bvec = bvec_on_stack;
2870 bvecsize = NFS_COMMITBVECSIZ;
2872 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2873 if (bvecpos >= bvecsize)
2875 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2876 nbp = TAILQ_NEXT(bp, b_bobufs);
2879 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2880 (B_DELWRI | B_NEEDCOMMIT)) {
2882 nbp = TAILQ_NEXT(bp, b_bobufs);
2888 * Work out if all buffers are using the same cred
2889 * so we can deal with them all with one commit.
2891 * NOTE: we are not clearing B_DONE here, so we have
2892 * to do it later on in this routine if we intend to
2893 * initiate I/O on the bp.
2895 * Note: to avoid loopback deadlocks, we do not
2896 * assign b_runningbufspace.
2899 wcred = bp->b_wcred;
2900 else if (wcred != bp->b_wcred)
2902 vfs_busy_pages(bp, 1);
2906 * bp is protected by being locked, but nbp is not
2907 * and vfs_busy_pages() may sleep. We have to
2910 nbp = TAILQ_NEXT(bp, b_bobufs);
2913 * A list of these buffers is kept so that the
2914 * second loop knows which buffers have actually
2915 * been committed. This is necessary, since there
2916 * may be a race between the commit rpc and new
2917 * uncommitted writes on the file.
2919 bvec[bvecpos++] = bp;
2920 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2924 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2932 * Commit data on the server, as required.
2933 * If all bufs are using the same wcred, then use that with
2934 * one call for all of them, otherwise commit each one
2937 if (wcred != NOCRED)
2938 retv = ncl_commit(vp, off, (int)(endoff - off),
2942 for (i = 0; i < bvecpos; i++) {
2945 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2947 size = (u_quad_t)(bp->b_dirtyend
2949 retv = ncl_commit(vp, off, (int)size,
2955 if (retv == NFSERR_STALEWRITEVERF)
2956 ncl_clearcommit(vp->v_mount);
2959 * Now, either mark the blocks I/O done or mark the
2960 * blocks dirty, depending on whether the commit
2963 for (i = 0; i < bvecpos; i++) {
2965 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
2968 * Error, leave B_DELWRI intact
2970 vfs_unbusy_pages(bp);
2974 * Success, remove B_DELWRI ( bundirty() ).
2976 * b_dirtyoff/b_dirtyend seem to be NFS
2977 * specific. We should probably move that
2978 * into bundirty(). XXX
2981 bp->b_flags |= B_ASYNC;
2983 bp->b_flags &= ~B_DONE;
2984 bp->b_ioflags &= ~BIO_ERROR;
2985 bp->b_dirtyoff = bp->b_dirtyend = 0;
2992 * Start/do any write(s) that are required.
2996 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2997 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2998 if (waitfor != MNT_WAIT || passone)
3001 error = BUF_TIMELOCK(bp,
3002 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK,
3003 BO_LOCKPTR(bo), "nfsfsync", slpflag, slptimeo);
3008 if (error == ENOLCK) {
3012 if (called_from_renewthread != 0) {
3014 * Return EIO so the flush will be retried
3020 if (newnfs_sigintr(nmp, td)) {
3024 if (slpflag == PCATCH) {
3030 if ((bp->b_flags & B_DELWRI) == 0)
3031 panic("nfs_fsync: not dirty");
3032 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
3038 bp->b_flags |= B_ASYNC;
3040 if (newnfs_sigintr(nmp, td)) {
3051 if (waitfor == MNT_WAIT) {
3052 while (bo->bo_numoutput) {
3053 error = bufobj_wwait(bo, slpflag, slptimeo);
3056 if (called_from_renewthread != 0) {
3058 * Return EIO so that the flush will be
3064 error = newnfs_sigintr(nmp, td);
3067 if (slpflag == PCATCH) {
3074 if (bo->bo_dirty.bv_cnt != 0 && commit) {
3079 * Wait for all the async IO requests to drain
3083 while (np->n_directio_asyncwr > 0) {
3084 np->n_flag |= NFSYNCWAIT;
3085 error = newnfs_msleep(td, &np->n_directio_asyncwr,
3086 &np->n_mtx, slpflag | (PRIBIO + 1),
3089 if (newnfs_sigintr(nmp, td)) {
3099 if (NFSHASPNFS(nmp)) {
3100 nfscl_layoutcommit(vp, td);
3102 * Invalidate the attribute cache, since writes to a DS
3103 * won't update the size attribute.
3106 np->n_attrstamp = 0;
3109 if (np->n_flag & NWRITEERR) {
3110 error = np->n_error;
3111 np->n_flag &= ~NWRITEERR;
3113 if (commit && bo->bo_dirty.bv_cnt == 0 &&
3114 bo->bo_numoutput == 0 && np->n_directio_asyncwr == 0)
3115 np->n_flag &= ~NMODIFIED;
3118 if (bvec != NULL && bvec != bvec_on_stack)
3120 if (error == 0 && commit != 0 && waitfor == MNT_WAIT &&
3121 (bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0 ||
3122 np->n_directio_asyncwr != 0)) {
3124 /* try, try again... */
3131 vn_printf(vp, "ncl_flush failed");
3132 error = called_from_renewthread != 0 ? EIO : EBUSY;
3138 * NFS advisory byte-level locks.
3141 nfs_advlock(struct vop_advlock_args *ap)
3143 struct vnode *vp = ap->a_vp;
3145 struct nfsnode *np = VTONFS(ap->a_vp);
3146 struct proc *p = (struct proc *)ap->a_id;
3147 struct thread *td = curthread; /* XXX */
3152 error = NFSVOPLOCK(vp, LK_SHARED);
3155 if (NFS_ISV4(vp) && (ap->a_flags & (F_POSIX | F_FLOCK)) != 0) {
3156 if (vp->v_type != VREG) {
3160 if ((ap->a_flags & F_POSIX) != 0)
3163 cred = td->td_ucred;
3164 NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY);
3165 if (VN_IS_DOOMED(vp)) {
3171 * If this is unlocking a write locked region, flush and
3172 * commit them before unlocking. This is required by
3173 * RFC3530 Sec. 9.3.2.
3175 if (ap->a_op == F_UNLCK &&
3176 nfscl_checkwritelocked(vp, ap->a_fl, cred, td, ap->a_id,
3178 (void) ncl_flush(vp, MNT_WAIT, td, 1, 0);
3181 * Loop around doing the lock op, while a blocking lock
3182 * must wait for the lock op to succeed.
3185 ret = nfsrpc_advlock(vp, np->n_size, ap->a_op,
3186 ap->a_fl, 0, cred, td, ap->a_id, ap->a_flags);
3187 if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
3188 ap->a_op == F_SETLK) {
3190 error = nfs_catnap(PZERO | PCATCH, ret,
3194 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
3195 if (VN_IS_DOOMED(vp)) {
3200 } while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
3201 ap->a_op == F_SETLK);
3202 if (ret == NFSERR_DENIED) {
3205 } else if (ret == EINVAL || ret == EBADF || ret == EINTR) {
3208 } else if (ret != 0) {
3214 * Now, if we just got a lock, invalidate data in the buffer
3215 * cache, as required, so that the coherency conforms with
3216 * RFC3530 Sec. 9.3.2.
3218 if (ap->a_op == F_SETLK) {
3219 if ((np->n_flag & NMODIFIED) == 0) {
3220 np->n_attrstamp = 0;
3221 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
3222 ret = VOP_GETATTR(vp, &va, cred);
3224 if ((np->n_flag & NMODIFIED) || ret ||
3225 np->n_change != va.va_filerev) {
3226 (void) ncl_vinvalbuf(vp, V_SAVE, td, 1);
3227 np->n_attrstamp = 0;
3228 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
3229 ret = VOP_GETATTR(vp, &va, cred);
3231 np->n_mtime = va.va_mtime;
3232 np->n_change = va.va_filerev;
3235 /* Mark that a file lock has been acquired. */
3237 np->n_flag |= NHASBEENLOCKED;
3240 } else if (!NFS_ISV4(vp)) {
3241 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
3242 size = VTONFS(vp)->n_size;
3244 error = lf_advlock(ap, &(vp->v_lockf), size);
3246 if (nfs_advlock_p != NULL)
3247 error = nfs_advlock_p(ap);
3253 if (error == 0 && ap->a_op == F_SETLK) {
3254 error = NFSVOPLOCK(vp, LK_SHARED);
3256 /* Mark that a file lock has been acquired. */
3258 np->n_flag |= NHASBEENLOCKED;
3272 * NFS advisory byte-level locks.
3275 nfs_advlockasync(struct vop_advlockasync_args *ap)
3277 struct vnode *vp = ap->a_vp;
3282 return (EOPNOTSUPP);
3283 error = NFSVOPLOCK(vp, LK_SHARED);
3286 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
3287 size = VTONFS(vp)->n_size;
3289 error = lf_advlockasync(ap, &(vp->v_lockf), size);
3298 * Print out the contents of an nfsnode.
3301 nfs_print(struct vop_print_args *ap)
3303 struct vnode *vp = ap->a_vp;
3304 struct nfsnode *np = VTONFS(vp);
3306 printf("\tfileid %jd fsid 0x%jx", (uintmax_t)np->n_vattr.na_fileid,
3307 (uintmax_t)np->n_vattr.na_fsid);
3308 if (vp->v_type == VFIFO)
3315 * This is the "real" nfs::bwrite(struct buf*).
3316 * We set B_CACHE if this is a VMIO buffer.
3319 ncl_writebp(struct buf *bp, int force __unused, struct thread *td)
3321 int oldflags, rtval;
3323 if (bp->b_flags & B_INVAL) {
3328 oldflags = bp->b_flags;
3329 bp->b_flags |= B_CACHE;
3332 * Undirty the bp. We will redirty it later if the I/O fails.
3335 bp->b_flags &= ~B_DONE;
3336 bp->b_ioflags &= ~BIO_ERROR;
3337 bp->b_iocmd = BIO_WRITE;
3339 bufobj_wref(bp->b_bufobj);
3340 curthread->td_ru.ru_oublock++;
3343 * Note: to avoid loopback deadlocks, we do not
3344 * assign b_runningbufspace.
3346 vfs_busy_pages(bp, 1);
3349 bp->b_iooffset = dbtob(bp->b_blkno);
3352 if ((oldflags & B_ASYNC) != 0)
3355 rtval = bufwait(bp);
3356 if (oldflags & B_DELWRI)
3363 * nfs special file access vnode op.
3364 * Essentially just get vattr and then imitate iaccess() since the device is
3365 * local to the client.
3368 nfsspec_access(struct vop_access_args *ap)
3371 struct ucred *cred = ap->a_cred;
3372 struct vnode *vp = ap->a_vp;
3373 accmode_t accmode = ap->a_accmode;
3378 * Disallow write attempts on filesystems mounted read-only;
3379 * unless the file is a socket, fifo, or a block or character
3380 * device resident on the filesystem.
3382 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3383 switch (vp->v_type) {
3393 error = VOP_GETATTR(vp, vap, cred);
3396 error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid,
3397 accmode, cred, NULL);
3403 * Read wrapper for fifos.
3406 nfsfifo_read(struct vop_read_args *ap)
3408 struct nfsnode *np = VTONFS(ap->a_vp);
3416 vfs_timestamp(&np->n_atim);
3418 error = fifo_specops.vop_read(ap);
3423 * Write wrapper for fifos.
3426 nfsfifo_write(struct vop_write_args *ap)
3428 struct nfsnode *np = VTONFS(ap->a_vp);
3435 vfs_timestamp(&np->n_mtim);
3437 return(fifo_specops.vop_write(ap));
3441 * Close wrapper for fifos.
3443 * Update the times on the nfsnode then do fifo close.
3446 nfsfifo_close(struct vop_close_args *ap)
3448 struct vnode *vp = ap->a_vp;
3449 struct nfsnode *np = VTONFS(vp);
3454 if (np->n_flag & (NACC | NUPD)) {
3456 if (np->n_flag & NACC)
3458 if (np->n_flag & NUPD)
3461 if (vrefcnt(vp) == 1 &&
3462 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3464 if (np->n_flag & NACC)
3465 vattr.va_atime = np->n_atim;
3466 if (np->n_flag & NUPD)
3467 vattr.va_mtime = np->n_mtim;
3469 (void)VOP_SETATTR(vp, &vattr, ap->a_cred);
3475 return (fifo_specops.vop_close(ap));
3479 * Just call ncl_writebp() with the force argument set to 1.
3481 * NOTE: B_DONE may or may not be set in a_bp on call.
3484 nfs_bwrite(struct buf *bp)
3487 return (ncl_writebp(bp, 1, curthread));
3490 struct buf_ops buf_ops_newnfs = {
3491 .bop_name = "buf_ops_nfs",
3492 .bop_write = nfs_bwrite,
3493 .bop_strategy = bufstrategy,
3494 .bop_sync = bufsync,
3495 .bop_bdflush = bufbdflush,
3499 nfs_getacl(struct vop_getacl_args *ap)
3503 if (ap->a_type != ACL_TYPE_NFS4)
3504 return (EOPNOTSUPP);
3505 error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3507 if (error > NFSERR_STALE) {
3508 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3515 nfs_setacl(struct vop_setacl_args *ap)
3519 if (ap->a_type != ACL_TYPE_NFS4)
3520 return (EOPNOTSUPP);
3521 error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3523 if (error > NFSERR_STALE) {
3524 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3531 * VOP_ADVISE for NFS.
3532 * Just return 0 for any errors, since it is just a hint.
3535 nfs_advise(struct vop_advise_args *ap)
3537 struct thread *td = curthread;
3538 struct nfsmount *nmp;
3543 * First do vop_stdadvise() to handle the buffer cache.
3545 error = vop_stdadvise(ap);
3548 if (ap->a_start < 0 || ap->a_end < 0)
3550 if (ap->a_end == OFF_MAX)
3552 else if (ap->a_end < ap->a_start)
3555 len = ap->a_end - ap->a_start + 1;
3556 nmp = VFSTONFS(ap->a_vp->v_mount);
3557 mtx_lock(&nmp->nm_mtx);
3558 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
3559 (NFSHASPNFS(nmp) && (nmp->nm_privflag & NFSMNTP_IOADVISETHRUMDS) ==
3560 0) || (nmp->nm_privflag & NFSMNTP_NOADVISE) != 0) {
3561 mtx_unlock(&nmp->nm_mtx);
3564 mtx_unlock(&nmp->nm_mtx);
3565 error = nfsrpc_advise(ap->a_vp, ap->a_start, len, ap->a_advice,
3567 if (error == NFSERR_NOTSUPP) {
3568 mtx_lock(&nmp->nm_mtx);
3569 nmp->nm_privflag |= NFSMNTP_NOADVISE;
3570 mtx_unlock(&nmp->nm_mtx);
3579 nfs_allocate(struct vop_allocate_args *ap)
3581 struct vnode *vp = ap->a_vp;
3582 struct thread *td = curthread;
3583 struct nfsvattr nfsva;
3584 struct nfsmount *nmp;
3585 int attrflag, error, ret;
3588 nmp = VFSTONFS(vp->v_mount);
3589 mtx_lock(&nmp->nm_mtx);
3590 if (NFSHASNFSV4(nmp) && nmp->nm_minorvers >= NFSV42_MINORVERSION &&
3591 (nmp->nm_privflag & NFSMNTP_NOALLOCATE) == 0) {
3592 mtx_unlock(&nmp->nm_mtx);
3594 * Flush first to ensure that the allocate adds to the
3595 * file's allocation on the server.
3597 error = ncl_flush(vp, MNT_WAIT, td, 1, 0);
3599 error = nfsrpc_allocate(vp, *ap->a_offset, *ap->a_len,
3600 &nfsva, &attrflag, td->td_ucred, td, NULL);
3602 *ap->a_offset += *ap->a_len;
3604 } else if (error == NFSERR_NOTSUPP) {
3605 mtx_lock(&nmp->nm_mtx);
3606 nmp->nm_privflag |= NFSMNTP_NOALLOCATE;
3607 mtx_unlock(&nmp->nm_mtx);
3610 mtx_unlock(&nmp->nm_mtx);
3614 * If the NFS server cannot perform the Allocate operation, just call
3615 * vop_stdallocate() to perform it.
3618 error = vop_stdallocate(ap);
3619 if (attrflag != 0) {
3620 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
3621 if (error == 0 && ret != 0)
3625 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
3630 * nfs copy_file_range call
3633 nfs_copy_file_range(struct vop_copy_file_range_args *ap)
3635 struct vnode *invp = ap->a_invp;
3636 struct vnode *outvp = ap->a_outvp;
3638 struct nfsvattr innfsva, outnfsva;
3641 struct nfsmount *nmp;
3642 size_t len, len2, copiedlen;
3643 int error, inattrflag, outattrflag, ret, ret2;
3644 off_t inoff, outoff;
3645 bool consecutive, must_commit, tryoutcred;
3648 nmp = VFSTONFS(invp->v_mount);
3649 mtx_lock(&nmp->nm_mtx);
3650 /* NFSv4.2 Copy is not permitted for infile == outfile. */
3651 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
3652 (nmp->nm_privflag & NFSMNTP_NOCOPY) != 0 || invp == outvp) {
3653 mtx_unlock(&nmp->nm_mtx);
3654 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp,
3655 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags,
3656 ap->a_incred, ap->a_outcred, ap->a_fsizetd);
3659 mtx_unlock(&nmp->nm_mtx);
3661 /* Lock both vnodes, avoiding risk of deadlock. */
3664 error = vn_start_write(outvp, &mp, V_WAIT);
3666 error = vn_lock(outvp, LK_EXCLUSIVE);
3668 error = vn_lock(invp, LK_SHARED | LK_NOWAIT);
3673 vn_finished_write(mp);
3675 error = vn_lock(invp, LK_SHARED);
3681 vn_finished_write(mp);
3682 } while (error == 0);
3687 * Do the vn_rlimit_fsize() check. Should this be above the VOP layer?
3689 io.uio_offset = *ap->a_outoffp;
3690 io.uio_resid = *ap->a_lenp;
3691 error = vn_rlimit_fsize(outvp, &io, ap->a_fsizetd);
3694 * Flush the input file so that the data is up to date before
3695 * the copy. Flush writes for the output file so that they
3696 * do not overwrite the data copied to the output file by the Copy.
3697 * Set the commit argument for both flushes so that the data is on
3698 * stable storage before the Copy RPC. This is done in case the
3699 * server reboots during the Copy and needs to be redone.
3702 error = ncl_flush(invp, MNT_WAIT, curthread, 1, 0);
3704 error = ncl_flush(outvp, MNT_WAIT, curthread, 1, 0);
3706 /* Do the actual NFSv4.2 RPC. */
3708 mtx_lock(&nmp->nm_mtx);
3709 if ((nmp->nm_privflag & NFSMNTP_NOCONSECUTIVE) == 0)
3712 consecutive = false;
3713 mtx_unlock(&nmp->nm_mtx);
3714 inoff = *ap->a_inoffp;
3715 outoff = *ap->a_outoffp;
3717 must_commit = false;
3719 vap = &VTONFS(invp)->n_vattr.na_vattr;
3720 error = VOP_GETATTR(invp, vap, ap->a_incred);
3723 * Clip "len" at va_size so that RFC compliant servers
3724 * will not reply NFSERR_INVAL.
3725 * Setting "len == 0" for the RPC would be preferred,
3726 * but some Linux servers do not support that.
3728 if (inoff >= vap->va_size)
3729 *ap->a_lenp = len = 0;
3730 else if (inoff + len > vap->va_size)
3731 *ap->a_lenp = len = vap->va_size - inoff;
3736 while (len > 0 && error == 0) {
3737 inattrflag = outattrflag = 0;
3740 error = nfsrpc_copy_file_range(invp, ap->a_inoffp,
3741 outvp, ap->a_outoffp, &len2, ap->a_flags,
3742 &inattrflag, &innfsva, &outattrflag, &outnfsva,
3743 ap->a_outcred, consecutive, &must_commit);
3745 error = nfsrpc_copy_file_range(invp, ap->a_inoffp,
3746 outvp, ap->a_outoffp, &len2, ap->a_flags,
3747 &inattrflag, &innfsva, &outattrflag, &outnfsva,
3748 ap->a_incred, consecutive, &must_commit);
3749 if (inattrflag != 0)
3750 ret = nfscl_loadattrcache(&invp, &innfsva, NULL, NULL,
3752 if (outattrflag != 0)
3753 ret2 = nfscl_loadattrcache(&outvp, &outnfsva, NULL,
3756 if (consecutive == false) {
3758 mtx_lock(&nmp->nm_mtx);
3760 NFSMNTP_NOCONSECUTIVE;
3761 mtx_unlock(&nmp->nm_mtx);
3763 error = NFSERR_OFFLOADNOREQS;
3766 * If the Copy returns a length == 0, it hit the
3767 * EOF on the input file.
3770 *ap->a_lenp = copiedlen;
3776 if (len == 0 && must_commit && error == 0)
3777 error = ncl_commit(outvp, outoff, *ap->a_lenp,
3778 ap->a_outcred, curthread);
3779 if (error == 0 && ret != 0)
3781 if (error == 0 && ret2 != 0)
3783 } else if (error == NFSERR_OFFLOADNOREQS && consecutive) {
3785 * Try consecutive == false, which is ok only if all
3788 consecutive = false;
3790 } else if (error == NFSERR_ACCES && tryoutcred) {
3791 /* Try again with incred. */
3795 if (error == NFSERR_STALEWRITEVERF) {
3797 * Server rebooted, so do it all again.
3799 *ap->a_inoffp = inoff;
3800 *ap->a_outoffp = outoff;
3802 must_commit = false;
3809 vn_finished_write(mp);
3810 if (error == NFSERR_NOTSUPP || error == NFSERR_OFFLOADNOREQS ||
3811 error == NFSERR_ACCES) {
3813 * Unlike the NFSv4.2 Copy, vn_generic_copy_file_range() can
3814 * use a_incred for the read and a_outcred for the write, so
3815 * try this for NFSERR_ACCES failures for the Copy.
3816 * For NFSERR_NOTSUPP and NFSERR_OFFLOADNOREQS, the Copy can
3817 * never succeed, so disable it.
3819 if (error != NFSERR_ACCES) {
3820 /* Can never do Copy on this mount. */
3821 mtx_lock(&nmp->nm_mtx);
3822 nmp->nm_privflag |= NFSMNTP_NOCOPY;
3823 mtx_unlock(&nmp->nm_mtx);
3825 *ap->a_inoffp = inoff;
3826 *ap->a_outoffp = outoff;
3827 error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp,
3828 ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags,
3829 ap->a_incred, ap->a_outcred, ap->a_fsizetd);
3830 } else if (error != 0)
3834 error = nfscl_maperr(curthread, error, (uid_t)0, (gid_t)0);
3842 nfs_ioctl(struct vop_ioctl_args *ap)
3844 struct vnode *vp = ap->a_vp;
3845 struct nfsvattr nfsva;
3846 struct nfsmount *nmp;
3847 int attrflag, content, error, ret;
3848 bool eof = false; /* shut up compiler. */
3850 if (vp->v_type != VREG)
3852 nmp = VFSTONFS(vp->v_mount);
3853 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION) {
3854 error = vop_stdioctl(ap);
3858 /* Do the actual NFSv4.2 RPC. */
3859 switch (ap->a_command) {
3861 content = NFSV4CONTENT_DATA;
3864 content = NFSV4CONTENT_HOLE;
3870 error = vn_lock(vp, LK_SHARED);
3874 if (*((off_t *)ap->a_data) >= VTONFS(vp)->n_size)
3878 * Flush all writes, so that the server is up to date.
3879 * Although a Commit is not required, the commit argument
3880 * is set so that, for a pNFS File/Flexible File Layout
3881 * server, the LayoutCommit will be done to ensure the file
3882 * size is up to date on the Metadata Server.
3884 error = ncl_flush(vp, MNT_WAIT, ap->a_td, 1, 0);
3886 error = nfsrpc_seek(vp, (off_t *)ap->a_data, &eof,
3887 content, ap->a_cred, &nfsva, &attrflag);
3888 /* If at eof for FIOSEEKDATA, return ENXIO. */
3889 if (eof && error == 0 && content == NFSV4CONTENT_DATA)
3892 if (attrflag != 0) {
3893 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
3894 if (error == 0 && ret != 0)
3905 * nfs getextattr call
3908 nfs_getextattr(struct vop_getextattr_args *ap)
3910 struct vnode *vp = ap->a_vp;
3911 struct nfsmount *nmp;
3913 struct thread *td = ap->a_td;
3914 struct nfsvattr nfsva;
3916 int attrflag, error, ret;
3918 nmp = VFSTONFS(vp->v_mount);
3919 mtx_lock(&nmp->nm_mtx);
3920 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
3921 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
3922 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
3923 mtx_unlock(&nmp->nm_mtx);
3924 return (EOPNOTSUPP);
3926 mtx_unlock(&nmp->nm_mtx);
3930 cred = td->td_ucred;
3931 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */
3933 error = nfsrpc_getextattr(vp, ap->a_name, ap->a_uio, &len, &nfsva,
3934 &attrflag, cred, td);
3935 if (attrflag != 0) {
3936 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
3937 if (error == 0 && ret != 0)
3940 if (error == 0 && ap->a_size != NULL)
3944 case NFSERR_NOTSUPP:
3945 case NFSERR_OPILLEGAL:
3946 mtx_lock(&nmp->nm_mtx);
3947 nmp->nm_privflag |= NFSMNTP_NOXATTR;
3948 mtx_unlock(&nmp->nm_mtx);
3951 case NFSERR_NOXATTR:
3952 case NFSERR_XATTR2BIG:
3956 error = nfscl_maperr(td, error, 0, 0);
3963 * nfs setextattr call
3966 nfs_setextattr(struct vop_setextattr_args *ap)
3968 struct vnode *vp = ap->a_vp;
3969 struct nfsmount *nmp;
3971 struct thread *td = ap->a_td;
3972 struct nfsvattr nfsva;
3973 int attrflag, error, ret;
3975 nmp = VFSTONFS(vp->v_mount);
3976 mtx_lock(&nmp->nm_mtx);
3977 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
3978 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
3979 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
3980 mtx_unlock(&nmp->nm_mtx);
3981 return (EOPNOTSUPP);
3983 mtx_unlock(&nmp->nm_mtx);
3985 if (ap->a_uio->uio_resid <= 0)
3989 cred = td->td_ucred;
3990 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */
3992 error = nfsrpc_setextattr(vp, ap->a_name, ap->a_uio, &nfsva,
3993 &attrflag, cred, td);
3994 if (attrflag != 0) {
3995 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
3996 if (error == 0 && ret != 0)
4001 case NFSERR_NOTSUPP:
4002 case NFSERR_OPILLEGAL:
4003 mtx_lock(&nmp->nm_mtx);
4004 nmp->nm_privflag |= NFSMNTP_NOXATTR;
4005 mtx_unlock(&nmp->nm_mtx);
4008 case NFSERR_NOXATTR:
4009 case NFSERR_XATTR2BIG:
4013 error = nfscl_maperr(td, error, 0, 0);
4020 * nfs listextattr call
4023 nfs_listextattr(struct vop_listextattr_args *ap)
4025 struct vnode *vp = ap->a_vp;
4026 struct nfsmount *nmp;
4028 struct thread *td = ap->a_td;
4029 struct nfsvattr nfsva;
4032 int attrflag, error, ret;
4035 nmp = VFSTONFS(vp->v_mount);
4036 mtx_lock(&nmp->nm_mtx);
4037 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
4038 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
4039 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
4040 mtx_unlock(&nmp->nm_mtx);
4041 return (EOPNOTSUPP);
4043 mtx_unlock(&nmp->nm_mtx);
4047 cred = td->td_ucred;
4049 /* Loop around doing List Extended Attribute RPCs. */
4054 while (!eof && error == 0) {
4055 len = nmp->nm_rsize;
4057 error = nfsrpc_listextattr(vp, &cookie, ap->a_uio, &len, &eof,
4058 &nfsva, &attrflag, cred, td);
4059 if (attrflag != 0) {
4060 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
4062 if (error == 0 && ret != 0)
4067 if (len2 > SSIZE_MAX)
4071 if (error == 0 && ap->a_size != NULL)
4075 case NFSERR_NOTSUPP:
4076 case NFSERR_OPILLEGAL:
4077 mtx_lock(&nmp->nm_mtx);
4078 nmp->nm_privflag |= NFSMNTP_NOXATTR;
4079 mtx_unlock(&nmp->nm_mtx);
4082 case NFSERR_NOXATTR:
4083 case NFSERR_XATTR2BIG:
4087 error = nfscl_maperr(td, error, 0, 0);
4094 * nfs setextattr call
4097 nfs_deleteextattr(struct vop_deleteextattr_args *ap)
4099 struct vnode *vp = ap->a_vp;
4100 struct nfsmount *nmp;
4101 struct nfsvattr nfsva;
4102 int attrflag, error, ret;
4104 nmp = VFSTONFS(vp->v_mount);
4105 mtx_lock(&nmp->nm_mtx);
4106 if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
4107 (nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
4108 ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
4109 mtx_unlock(&nmp->nm_mtx);
4110 return (EOPNOTSUPP);
4112 mtx_unlock(&nmp->nm_mtx);
4114 /* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */
4116 error = nfsrpc_rmextattr(vp, ap->a_name, &nfsva, &attrflag, ap->a_cred,
4118 if (attrflag != 0) {
4119 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
4120 if (error == 0 && ret != 0)
4125 case NFSERR_NOTSUPP:
4126 case NFSERR_OPILLEGAL:
4127 mtx_lock(&nmp->nm_mtx);
4128 nmp->nm_privflag |= NFSMNTP_NOXATTR;
4129 mtx_unlock(&nmp->nm_mtx);
4132 case NFSERR_NOXATTR:
4133 case NFSERR_XATTR2BIG:
4137 error = nfscl_maperr(ap->a_td, error, 0, 0);
4144 * Return POSIX pathconf information applicable to nfs filesystems.
4147 nfs_pathconf(struct vop_pathconf_args *ap)
4149 struct nfsv3_pathconf pc;
4150 struct nfsvattr nfsva;
4151 struct vnode *vp = ap->a_vp;
4152 struct nfsmount *nmp;
4153 struct thread *td = curthread;
4156 int attrflag, error;
4158 if ((NFS_ISV34(vp) && (ap->a_name == _PC_LINK_MAX ||
4159 ap->a_name == _PC_NAME_MAX || ap->a_name == _PC_CHOWN_RESTRICTED ||
4160 ap->a_name == _PC_NO_TRUNC)) ||
4161 (NFS_ISV4(vp) && ap->a_name == _PC_ACL_NFS4)) {
4163 * Since only the above 4 a_names are returned by the NFSv3
4164 * Pathconf RPC, there is no point in doing it for others.
4165 * For NFSv4, the Pathconf RPC (actually a Getattr Op.) can
4166 * be used for _PC_NFS4_ACL as well.
4168 error = nfsrpc_pathconf(vp, &pc, td->td_ucred, td, &nfsva,
4171 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
4177 * For NFSv2 (or NFSv3 when not one of the above 4 a_names),
4180 pc.pc_linkmax = NFS_LINK_MAX;
4181 pc.pc_namemax = NFS_MAXNAMLEN;
4183 pc.pc_chownrestricted = 1;
4184 pc.pc_caseinsensitive = 0;
4185 pc.pc_casepreserving = 1;
4188 switch (ap->a_name) {
4191 *ap->a_retval = pc.pc_linkmax;
4193 *ap->a_retval = MIN(LONG_MAX, pc.pc_linkmax);
4197 *ap->a_retval = pc.pc_namemax;
4200 if (ap->a_vp->v_type == VDIR || ap->a_vp->v_type == VFIFO)
4201 *ap->a_retval = PIPE_BUF;
4205 case _PC_CHOWN_RESTRICTED:
4206 *ap->a_retval = pc.pc_chownrestricted;
4209 *ap->a_retval = pc.pc_notrunc;
4212 if (NFS_ISV4(vp) && nfsrv_useacl != 0 && attrflag != 0 &&
4213 NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL))
4218 case _PC_ACL_PATH_MAX:
4220 *ap->a_retval = ACL_MAX_ENTRIES;
4230 case _PC_ALLOC_SIZE_MIN:
4231 *ap->a_retval = vp->v_mount->mnt_stat.f_bsize;
4233 case _PC_FILESIZEBITS:
4239 case _PC_REC_INCR_XFER_SIZE:
4240 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
4242 case _PC_REC_MAX_XFER_SIZE:
4243 *ap->a_retval = -1; /* means ``unlimited'' */
4245 case _PC_REC_MIN_XFER_SIZE:
4246 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
4248 case _PC_REC_XFER_ALIGN:
4249 *ap->a_retval = PAGE_SIZE;
4251 case _PC_SYMLINK_MAX:
4252 *ap->a_retval = NFS_MAXPATHLEN;
4254 case _PC_MIN_HOLE_SIZE:
4255 /* Only some NFSv4.2 servers support Seek for Holes. */
4257 nmp = VFSTONFS(vp->v_mount);
4258 if (NFS_ISV4(vp) && nmp->nm_minorvers == NFSV42_MINORVERSION) {
4260 * NFSv4.2 doesn't have an attribute for hole size,
4261 * so all we can do is see if the Seek operation is
4262 * supported and then use f_iosize as a "best guess".
4264 mtx_lock(&nmp->nm_mtx);
4265 if ((nmp->nm_privflag & NFSMNTP_SEEKTESTED) == 0) {
4266 mtx_unlock(&nmp->nm_mtx);
4269 error = nfsrpc_seek(vp, &off, &eof,
4270 NFSV4CONTENT_HOLE, td->td_ucred, &nfsva,
4273 nfscl_loadattrcache(&vp, &nfsva,
4275 mtx_lock(&nmp->nm_mtx);
4276 if (error == NFSERR_NOTSUPP)
4277 nmp->nm_privflag |= NFSMNTP_SEEKTESTED;
4279 nmp->nm_privflag |= NFSMNTP_SEEKTESTED |
4283 if ((nmp->nm_privflag & NFSMNTP_SEEK) != 0)
4284 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
4285 mtx_unlock(&nmp->nm_mtx);
4290 error = vop_stdpathconf(ap);