2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * from nfs_vnops.c 8.16 (Berkeley) 5/27/95
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 * vnode op calls for Sun NFS version 2, 3 and 4
42 #include "opt_kdtrace.h"
45 #include <sys/param.h>
46 #include <sys/kernel.h>
47 #include <sys/systm.h>
48 #include <sys/resourcevar.h>
50 #include <sys/mount.h>
54 #include <sys/malloc.h>
56 #include <sys/namei.h>
57 #include <sys/socket.h>
58 #include <sys/vnode.h>
59 #include <sys/dirent.h>
60 #include <sys/fcntl.h>
61 #include <sys/lockf.h>
63 #include <sys/sysctl.h>
64 #include <sys/signalvar.h>
67 #include <vm/vm_extern.h>
68 #include <vm/vm_object.h>
70 #include <fs/nfs/nfsport.h>
71 #include <fs/nfsclient/nfsnode.h>
72 #include <fs/nfsclient/nfsmount.h>
73 #include <fs/nfsclient/nfs.h>
74 #include <fs/nfsclient/nfs_kdtrace.h>
77 #include <netinet/in.h>
78 #include <netinet/in_var.h>
80 #include <nfs/nfs_lock.h>
83 #include <sys/dtrace_bsd.h>
85 dtrace_nfsclient_accesscache_flush_probe_func_t
86 dtrace_nfscl_accesscache_flush_done_probe;
87 uint32_t nfscl_accesscache_flush_done_id;
89 dtrace_nfsclient_accesscache_get_probe_func_t
90 dtrace_nfscl_accesscache_get_hit_probe,
91 dtrace_nfscl_accesscache_get_miss_probe;
92 uint32_t nfscl_accesscache_get_hit_id;
93 uint32_t nfscl_accesscache_get_miss_id;
95 dtrace_nfsclient_accesscache_load_probe_func_t
96 dtrace_nfscl_accesscache_load_done_probe;
97 uint32_t nfscl_accesscache_load_done_id;
98 #endif /* !KDTRACE_HOOKS */
104 extern struct nfsstats newnfsstats;
105 extern int nfsrv_useacl;
106 extern int nfscl_debuglevel;
107 MALLOC_DECLARE(M_NEWNFSREQ);
110 * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these
111 * calls are not in getblk() and brelse() so that they would not be necessary
115 #define vfs_busy_pages(bp, f)
118 static vop_read_t nfsfifo_read;
119 static vop_write_t nfsfifo_write;
120 static vop_close_t nfsfifo_close;
121 static int nfs_setattrrpc(struct vnode *, struct vattr *, struct ucred *,
123 static vop_lookup_t nfs_lookup;
124 static vop_create_t nfs_create;
125 static vop_mknod_t nfs_mknod;
126 static vop_open_t nfs_open;
127 static vop_pathconf_t nfs_pathconf;
128 static vop_close_t nfs_close;
129 static vop_access_t nfs_access;
130 static vop_getattr_t nfs_getattr;
131 static vop_setattr_t nfs_setattr;
132 static vop_read_t nfs_read;
133 static vop_fsync_t nfs_fsync;
134 static vop_remove_t nfs_remove;
135 static vop_link_t nfs_link;
136 static vop_rename_t nfs_rename;
137 static vop_mkdir_t nfs_mkdir;
138 static vop_rmdir_t nfs_rmdir;
139 static vop_symlink_t nfs_symlink;
140 static vop_readdir_t nfs_readdir;
141 static vop_strategy_t nfs_strategy;
142 static vop_lock1_t nfs_lock1;
143 static int nfs_lookitup(struct vnode *, char *, int,
144 struct ucred *, struct thread *, struct nfsnode **);
145 static int nfs_sillyrename(struct vnode *, struct vnode *,
146 struct componentname *);
147 static vop_access_t nfsspec_access;
148 static vop_readlink_t nfs_readlink;
149 static vop_print_t nfs_print;
150 static vop_advlock_t nfs_advlock;
151 static vop_advlockasync_t nfs_advlockasync;
152 static vop_getacl_t nfs_getacl;
153 static vop_setacl_t nfs_setacl;
156 * Global vfs data structures for nfs
158 struct vop_vector newnfs_vnodeops = {
159 .vop_default = &default_vnodeops,
160 .vop_access = nfs_access,
161 .vop_advlock = nfs_advlock,
162 .vop_advlockasync = nfs_advlockasync,
163 .vop_close = nfs_close,
164 .vop_create = nfs_create,
165 .vop_fsync = nfs_fsync,
166 .vop_getattr = nfs_getattr,
167 .vop_getpages = ncl_getpages,
168 .vop_putpages = ncl_putpages,
169 .vop_inactive = ncl_inactive,
170 .vop_link = nfs_link,
171 .vop_lock1 = nfs_lock1,
172 .vop_lookup = nfs_lookup,
173 .vop_mkdir = nfs_mkdir,
174 .vop_mknod = nfs_mknod,
175 .vop_open = nfs_open,
176 .vop_pathconf = nfs_pathconf,
177 .vop_print = nfs_print,
178 .vop_read = nfs_read,
179 .vop_readdir = nfs_readdir,
180 .vop_readlink = nfs_readlink,
181 .vop_reclaim = ncl_reclaim,
182 .vop_remove = nfs_remove,
183 .vop_rename = nfs_rename,
184 .vop_rmdir = nfs_rmdir,
185 .vop_setattr = nfs_setattr,
186 .vop_strategy = nfs_strategy,
187 .vop_symlink = nfs_symlink,
188 .vop_write = ncl_write,
189 .vop_getacl = nfs_getacl,
190 .vop_setacl = nfs_setacl,
193 struct vop_vector newnfs_fifoops = {
194 .vop_default = &fifo_specops,
195 .vop_access = nfsspec_access,
196 .vop_close = nfsfifo_close,
197 .vop_fsync = nfs_fsync,
198 .vop_getattr = nfs_getattr,
199 .vop_inactive = ncl_inactive,
200 .vop_print = nfs_print,
201 .vop_read = nfsfifo_read,
202 .vop_reclaim = ncl_reclaim,
203 .vop_setattr = nfs_setattr,
204 .vop_write = nfsfifo_write,
207 static int nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp,
208 struct componentname *cnp, struct vattr *vap);
209 static int nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
210 int namelen, struct ucred *cred, struct thread *td);
211 static int nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp,
212 char *fnameptr, int fnamelen, struct vnode *tdvp, struct vnode *tvp,
213 char *tnameptr, int tnamelen, struct ucred *cred, struct thread *td);
214 static int nfs_renameit(struct vnode *sdvp, struct vnode *svp,
215 struct componentname *scnp, struct sillyrename *sp);
220 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1))
222 SYSCTL_DECL(_vfs_nfs);
224 static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
225 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
226 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
228 static int nfs_prime_access_cache = 0;
229 SYSCTL_INT(_vfs_nfs, OID_AUTO, prime_access_cache, CTLFLAG_RW,
230 &nfs_prime_access_cache, 0,
231 "Prime NFS ACCESS cache when fetching attributes");
233 static int newnfs_commit_on_close = 0;
234 SYSCTL_INT(_vfs_nfs, OID_AUTO, commit_on_close, CTLFLAG_RW,
235 &newnfs_commit_on_close, 0, "write+commit on close, else only write");
237 static int nfs_clean_pages_on_close = 1;
238 SYSCTL_INT(_vfs_nfs, OID_AUTO, clean_pages_on_close, CTLFLAG_RW,
239 &nfs_clean_pages_on_close, 0, "NFS clean dirty pages on close");
241 int newnfs_directio_enable = 0;
242 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_enable, CTLFLAG_RW,
243 &newnfs_directio_enable, 0, "Enable NFS directio");
245 int nfs_keep_dirty_on_error;
246 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_keep_dirty_on_error, CTLFLAG_RW,
247 &nfs_keep_dirty_on_error, 0, "Retry pageout if error returned");
250 * This sysctl allows other processes to mmap a file that has been opened
251 * O_DIRECT by a process. In general, having processes mmap the file while
252 * Direct IO is in progress can lead to Data Inconsistencies. But, we allow
253 * this by default to prevent DoS attacks - to prevent a malicious user from
254 * opening up files O_DIRECT preventing other users from mmap'ing these
255 * files. "Protected" environments where stricter consistency guarantees are
256 * required can disable this knob. The process that opened the file O_DIRECT
257 * cannot mmap() the file, because mmap'ed IO on an O_DIRECT open() is not
260 int newnfs_directio_allow_mmap = 1;
261 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_allow_mmap, CTLFLAG_RW,
262 &newnfs_directio_allow_mmap, 0, "Enable mmaped IO on file with O_DIRECT opens");
265 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
266 &newnfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
268 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
269 &newnfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
272 #define NFSACCESS_ALL (NFSACCESS_READ | NFSACCESS_MODIFY \
273 | NFSACCESS_EXTEND | NFSACCESS_EXECUTE \
274 | NFSACCESS_DELETE | NFSACCESS_LOOKUP)
278 * The list of locks after the description of the lock is the ordering
279 * of other locks acquired with the lock held.
280 * np->n_mtx : Protects the fields in the nfsnode.
282 VI_MTX (acquired indirectly)
283 * nmp->nm_mtx : Protects the fields in the nfsmount.
285 * ncl_iod_mutex : Global lock, protects shared nfsiod state.
286 * nfs_reqq_mtx : Global lock, protects the nfs_reqq list.
289 * rep->r_mtx : Protects the fields in an nfsreq.
293 nfs34_access_otw(struct vnode *vp, int wmode, struct thread *td,
294 struct ucred *cred, u_int32_t *retmode)
296 int error = 0, attrflag, i, lrupos;
298 struct nfsnode *np = VTONFS(vp);
299 struct nfsvattr nfsva;
301 error = nfsrpc_accessrpc(vp, wmode, cred, td, &nfsva, &attrflag,
304 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
307 mtx_lock(&np->n_mtx);
308 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
309 if (np->n_accesscache[i].uid == cred->cr_uid) {
310 np->n_accesscache[i].mode = rmode;
311 np->n_accesscache[i].stamp = time_second;
314 if (i > 0 && np->n_accesscache[i].stamp <
315 np->n_accesscache[lrupos].stamp)
318 if (i == NFS_ACCESSCACHESIZE) {
319 np->n_accesscache[lrupos].uid = cred->cr_uid;
320 np->n_accesscache[lrupos].mode = rmode;
321 np->n_accesscache[lrupos].stamp = time_second;
323 mtx_unlock(&np->n_mtx);
326 KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, rmode, 0);
327 } else if (NFS_ISV4(vp)) {
328 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
332 KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, 0,
339 * nfs access vnode op.
340 * For nfs version 2, just return ok. File accesses may fail later.
341 * For nfs version 3, use the access rpc to check accessibility. If file modes
342 * are changed on the server, accesses might still fail later.
345 nfs_access(struct vop_access_args *ap)
347 struct vnode *vp = ap->a_vp;
348 int error = 0, i, gotahit;
349 u_int32_t mode, wmode, rmode;
350 int v34 = NFS_ISV34(vp);
351 struct nfsnode *np = VTONFS(vp);
354 * Disallow write attempts on filesystems mounted read-only;
355 * unless the file is a socket, fifo, or a block or character
356 * device resident on the filesystem.
358 if ((ap->a_accmode & (VWRITE | VAPPEND | VWRITE_NAMED_ATTRS |
359 VDELETE_CHILD | VWRITE_ATTRIBUTES | VDELETE | VWRITE_ACL |
360 VWRITE_OWNER)) != 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0) {
361 switch (vp->v_type) {
371 * For nfs v3 or v4, check to see if we have done this recently, and if
372 * so return our cached result instead of making an ACCESS call.
373 * If not, do an access rpc, otherwise you are stuck emulating
374 * ufs_access() locally using the vattr. This may not be correct,
375 * since the server may apply other access criteria such as
376 * client uid-->server uid mapping that we do not know about.
379 if (ap->a_accmode & VREAD)
380 mode = NFSACCESS_READ;
383 if (vp->v_type != VDIR) {
384 if (ap->a_accmode & VWRITE)
385 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
386 if (ap->a_accmode & VAPPEND)
387 mode |= NFSACCESS_EXTEND;
388 if (ap->a_accmode & VEXEC)
389 mode |= NFSACCESS_EXECUTE;
390 if (ap->a_accmode & VDELETE)
391 mode |= NFSACCESS_DELETE;
393 if (ap->a_accmode & VWRITE)
394 mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
395 if (ap->a_accmode & VAPPEND)
396 mode |= NFSACCESS_EXTEND;
397 if (ap->a_accmode & VEXEC)
398 mode |= NFSACCESS_LOOKUP;
399 if (ap->a_accmode & VDELETE)
400 mode |= NFSACCESS_DELETE;
401 if (ap->a_accmode & VDELETE_CHILD)
402 mode |= NFSACCESS_MODIFY;
404 /* XXX safety belt, only make blanket request if caching */
405 if (nfsaccess_cache_timeout > 0) {
406 wmode = NFSACCESS_READ | NFSACCESS_MODIFY |
407 NFSACCESS_EXTEND | NFSACCESS_EXECUTE |
408 NFSACCESS_DELETE | NFSACCESS_LOOKUP;
414 * Does our cached result allow us to give a definite yes to
418 mtx_lock(&np->n_mtx);
419 for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
420 if (ap->a_cred->cr_uid == np->n_accesscache[i].uid) {
421 if (time_second < (np->n_accesscache[i].stamp
422 + nfsaccess_cache_timeout) &&
423 (np->n_accesscache[i].mode & mode) == mode) {
424 NFSINCRGLOBAL(newnfsstats.accesscache_hits);
430 mtx_unlock(&np->n_mtx);
433 KDTRACE_NFS_ACCESSCACHE_GET_HIT(vp,
434 ap->a_cred->cr_uid, mode);
436 KDTRACE_NFS_ACCESSCACHE_GET_MISS(vp,
437 ap->a_cred->cr_uid, mode);
441 * Either a no, or a don't know. Go to the wire.
443 NFSINCRGLOBAL(newnfsstats.accesscache_misses);
444 error = nfs34_access_otw(vp, wmode, ap->a_td,
447 (rmode & mode) != mode)
452 if ((error = nfsspec_access(ap)) != 0) {
456 * Attempt to prevent a mapped root from accessing a file
457 * which it shouldn't. We try to read a byte from the file
458 * if the user is root and the file is not zero length.
459 * After calling nfsspec_access, we should have the correct
462 mtx_lock(&np->n_mtx);
463 if (ap->a_cred->cr_uid == 0 && (ap->a_accmode & VREAD)
464 && VTONFS(vp)->n_size > 0) {
469 mtx_unlock(&np->n_mtx);
472 auio.uio_iov = &aiov;
476 auio.uio_segflg = UIO_SYSSPACE;
477 auio.uio_rw = UIO_READ;
478 auio.uio_td = ap->a_td;
480 if (vp->v_type == VREG)
481 error = ncl_readrpc(vp, &auio, ap->a_cred);
482 else if (vp->v_type == VDIR) {
484 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
486 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
487 error = ncl_readdirrpc(vp, &auio, ap->a_cred,
490 } else if (vp->v_type == VLNK)
491 error = ncl_readlinkrpc(vp, &auio, ap->a_cred);
495 mtx_unlock(&np->n_mtx);
503 * Check to see if the type is ok
504 * and that deletion is not in progress.
505 * For paged in text files, you will need to flush the page cache
506 * if consistency is lost.
510 nfs_open(struct vop_open_args *ap)
512 struct vnode *vp = ap->a_vp;
513 struct nfsnode *np = VTONFS(vp);
516 int fmode = ap->a_mode;
519 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK)
523 * For NFSv4, we need to do the Open Op before cache validation,
524 * so that we conform to RFC3530 Sec. 9.3.1.
527 error = nfsrpc_open(vp, fmode, ap->a_cred, ap->a_td);
529 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
536 * Now, if this Open will be doing reading, re-validate/flush the
537 * cache, so that Close/Open coherency is maintained.
539 mtx_lock(&np->n_mtx);
540 if (np->n_flag & NMODIFIED) {
541 mtx_unlock(&np->n_mtx);
542 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
543 if (error == EINTR || error == EIO) {
545 (void) nfsrpc_close(vp, 0, ap->a_td);
548 mtx_lock(&np->n_mtx);
550 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
551 if (vp->v_type == VDIR)
552 np->n_direofoffset = 0;
553 mtx_unlock(&np->n_mtx);
554 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
557 (void) nfsrpc_close(vp, 0, ap->a_td);
560 mtx_lock(&np->n_mtx);
561 np->n_mtime = vattr.va_mtime;
563 np->n_change = vattr.va_filerev;
565 mtx_unlock(&np->n_mtx);
566 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
569 (void) nfsrpc_close(vp, 0, ap->a_td);
572 mtx_lock(&np->n_mtx);
573 if ((NFS_ISV4(vp) && np->n_change != vattr.va_filerev) ||
574 NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
575 if (vp->v_type == VDIR)
576 np->n_direofoffset = 0;
577 mtx_unlock(&np->n_mtx);
578 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
579 if (error == EINTR || error == EIO) {
581 (void) nfsrpc_close(vp, 0, ap->a_td);
584 mtx_lock(&np->n_mtx);
585 np->n_mtime = vattr.va_mtime;
587 np->n_change = vattr.va_filerev;
592 * If the object has >= 1 O_DIRECT active opens, we disable caching.
594 if (newnfs_directio_enable && (fmode & O_DIRECT) &&
595 (vp->v_type == VREG)) {
596 if (np->n_directio_opens == 0) {
597 mtx_unlock(&np->n_mtx);
598 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
601 (void) nfsrpc_close(vp, 0, ap->a_td);
604 mtx_lock(&np->n_mtx);
605 np->n_flag |= NNONCACHE;
607 np->n_directio_opens++;
610 /* If opened for writing via NFSv4.1 or later, mark that for pNFS. */
611 if (NFSHASPNFS(VFSTONFS(vp->v_mount)) && (fmode & FWRITE) != 0)
612 np->n_flag |= NWRITEOPENED;
615 * If this is an open for writing, capture a reference to the
616 * credentials, so they can be used by ncl_putpages(). Using
617 * these write credentials is preferable to the credentials of
618 * whatever thread happens to be doing the VOP_PUTPAGES() since
619 * the write RPCs are less likely to fail with EACCES.
621 if ((fmode & FWRITE) != 0) {
622 cred = np->n_writecred;
623 np->n_writecred = crhold(ap->a_cred);
626 mtx_unlock(&np->n_mtx);
630 vnode_create_vobject(vp, vattr.va_size, ap->a_td);
636 * What an NFS client should do upon close after writing is a debatable issue.
637 * Most NFS clients push delayed writes to the server upon close, basically for
639 * 1 - So that any write errors may be reported back to the client process
640 * doing the close system call. By far the two most likely errors are
641 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
642 * 2 - To put a worst case upper bound on cache inconsistency between
643 * multiple clients for the file.
644 * There is also a consistency problem for Version 2 of the protocol w.r.t.
645 * not being able to tell if other clients are writing a file concurrently,
646 * since there is no way of knowing if the changed modify time in the reply
647 * is only due to the write for this client.
648 * (NFS Version 3 provides weak cache consistency data in the reply that
649 * should be sufficient to detect and handle this case.)
651 * The current code does the following:
652 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
653 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
654 * or commit them (this satisfies 1 and 2 except for the
655 * case where the server crashes after this close but
656 * before the commit RPC, which is felt to be "good
657 * enough". Changing the last argument to ncl_flush() to
658 * a 1 would force a commit operation, if it is felt a
659 * commit is necessary now.
660 * for NFS Version 4 - flush the dirty buffers and commit them, if
661 * nfscl_mustflush() says this is necessary.
662 * It is necessary if there is no write delegation held,
663 * in order to satisfy open/close coherency.
664 * If the file isn't cached on local stable storage,
665 * it may be necessary in order to detect "out of space"
666 * errors from the server, if the write delegation
667 * issued by the server doesn't allow the file to grow.
671 nfs_close(struct vop_close_args *ap)
673 struct vnode *vp = ap->a_vp;
674 struct nfsnode *np = VTONFS(vp);
675 struct nfsvattr nfsva;
677 int error = 0, ret, localcred = 0;
678 int fmode = ap->a_fflag;
680 if ((vp->v_mount->mnt_kern_flag & MNTK_UNMOUNTF))
683 * During shutdown, a_cred isn't valid, so just use root.
685 if (ap->a_cred == NOCRED) {
686 cred = newnfs_getcred();
691 if (vp->v_type == VREG) {
693 * Examine and clean dirty pages, regardless of NMODIFIED.
694 * This closes a major hole in close-to-open consistency.
695 * We want to push out all dirty pages (and buffers) on
696 * close, regardless of whether they were dirtied by
697 * mmap'ed writes or via write().
699 if (nfs_clean_pages_on_close && vp->v_object) {
700 VM_OBJECT_WLOCK(vp->v_object);
701 vm_object_page_clean(vp->v_object, 0, 0, 0);
702 VM_OBJECT_WUNLOCK(vp->v_object);
704 mtx_lock(&np->n_mtx);
705 if (np->n_flag & NMODIFIED) {
706 mtx_unlock(&np->n_mtx);
709 * Under NFSv3 we have dirty buffers to dispose of. We
710 * must flush them to the NFS server. We have the option
711 * of waiting all the way through the commit rpc or just
712 * waiting for the initial write. The default is to only
713 * wait through the initial write so the data is in the
714 * server's cache, which is roughly similar to the state
715 * a standard disk subsystem leaves the file in on close().
717 * We cannot clear the NMODIFIED bit in np->n_flag due to
718 * potential races with other processes, and certainly
719 * cannot clear it if we don't commit.
720 * These races occur when there is no longer the old
721 * traditional vnode locking implemented for Vnode Ops.
723 int cm = newnfs_commit_on_close ? 1 : 0;
724 error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td, cm, 0);
725 /* np->n_flag &= ~NMODIFIED; */
726 } else if (NFS_ISV4(vp)) {
727 if (nfscl_mustflush(vp) != 0) {
728 int cm = newnfs_commit_on_close ? 1 : 0;
729 error = ncl_flush(vp, MNT_WAIT, cred, ap->a_td,
732 * as above w.r.t races when clearing
734 * np->n_flag &= ~NMODIFIED;
738 error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
739 mtx_lock(&np->n_mtx);
742 * Invalidate the attribute cache in all cases.
743 * An open is going to fetch fresh attrs any way, other procs
744 * on this node that have file open will be forced to do an
745 * otw attr fetch, but this is safe.
746 * --> A user found that their RPC count dropped by 20% when
747 * this was commented out and I can't see any requirement
748 * for it, so I've disabled it when negative lookups are
749 * enabled. (What does this have to do with negative lookup
750 * caching? Well nothing, except it was reported by the
751 * same user that needed negative lookup caching and I wanted
752 * there to be a way to disable it to see if it
753 * is the cause of some caching/coherency issue that might
756 if (VFSTONFS(vp->v_mount)->nm_negnametimeo == 0) {
758 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
760 if (np->n_flag & NWRITEERR) {
761 np->n_flag &= ~NWRITEERR;
764 mtx_unlock(&np->n_mtx);
769 * Get attributes so "change" is up to date.
771 if (error == 0 && nfscl_mustflush(vp) != 0) {
772 ret = nfsrpc_getattr(vp, cred, ap->a_td, &nfsva,
775 np->n_change = nfsva.na_filerev;
776 (void) nfscl_loadattrcache(&vp, &nfsva, NULL,
784 ret = nfsrpc_close(vp, 0, ap->a_td);
788 error = nfscl_maperr(ap->a_td, error, (uid_t)0,
791 if (newnfs_directio_enable)
792 KASSERT((np->n_directio_asyncwr == 0),
793 ("nfs_close: dirty unflushed (%d) directio buffers\n",
794 np->n_directio_asyncwr));
795 if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) {
796 mtx_lock(&np->n_mtx);
797 KASSERT((np->n_directio_opens > 0),
798 ("nfs_close: unexpectedly value (0) of n_directio_opens\n"));
799 np->n_directio_opens--;
800 if (np->n_directio_opens == 0)
801 np->n_flag &= ~NNONCACHE;
802 mtx_unlock(&np->n_mtx);
810 * nfs getattr call from vfs.
813 nfs_getattr(struct vop_getattr_args *ap)
815 struct vnode *vp = ap->a_vp;
816 struct thread *td = curthread; /* XXX */
817 struct nfsnode *np = VTONFS(vp);
819 struct nfsvattr nfsva;
820 struct vattr *vap = ap->a_vap;
824 * Update local times for special files.
826 mtx_lock(&np->n_mtx);
827 if (np->n_flag & (NACC | NUPD))
829 mtx_unlock(&np->n_mtx);
831 * First look in the cache.
833 if (ncl_getattrcache(vp, &vattr) == 0) {
834 vap->va_type = vattr.va_type;
835 vap->va_mode = vattr.va_mode;
836 vap->va_nlink = vattr.va_nlink;
837 vap->va_uid = vattr.va_uid;
838 vap->va_gid = vattr.va_gid;
839 vap->va_fsid = vattr.va_fsid;
840 vap->va_fileid = vattr.va_fileid;
841 vap->va_size = vattr.va_size;
842 vap->va_blocksize = vattr.va_blocksize;
843 vap->va_atime = vattr.va_atime;
844 vap->va_mtime = vattr.va_mtime;
845 vap->va_ctime = vattr.va_ctime;
846 vap->va_gen = vattr.va_gen;
847 vap->va_flags = vattr.va_flags;
848 vap->va_rdev = vattr.va_rdev;
849 vap->va_bytes = vattr.va_bytes;
850 vap->va_filerev = vattr.va_filerev;
852 * Get the local modify time for the case of a write
855 nfscl_deleggetmodtime(vp, &vap->va_mtime);
859 if (NFS_ISV34(vp) && nfs_prime_access_cache &&
860 nfsaccess_cache_timeout > 0) {
861 NFSINCRGLOBAL(newnfsstats.accesscache_misses);
862 nfs34_access_otw(vp, NFSACCESS_ALL, td, ap->a_cred, NULL);
863 if (ncl_getattrcache(vp, ap->a_vap) == 0) {
864 nfscl_deleggetmodtime(vp, &ap->a_vap->va_mtime);
868 error = nfsrpc_getattr(vp, ap->a_cred, td, &nfsva, NULL);
870 error = nfscl_loadattrcache(&vp, &nfsva, vap, NULL, 0, 0);
873 * Get the local modify time for the case of a write
876 nfscl_deleggetmodtime(vp, &vap->va_mtime);
877 } else if (NFS_ISV4(vp)) {
878 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
887 nfs_setattr(struct vop_setattr_args *ap)
889 struct vnode *vp = ap->a_vp;
890 struct nfsnode *np = VTONFS(vp);
891 struct thread *td = curthread; /* XXX */
892 struct vattr *vap = ap->a_vap;
901 * Setting of flags and marking of atimes are not supported.
903 if (vap->va_flags != VNOVAL)
907 * Disallow write attempts if the filesystem is mounted read-only.
909 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
910 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
911 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
912 (vp->v_mount->mnt_flag & MNT_RDONLY))
914 if (vap->va_size != VNOVAL) {
915 switch (vp->v_type) {
922 if (vap->va_mtime.tv_sec == VNOVAL &&
923 vap->va_atime.tv_sec == VNOVAL &&
924 vap->va_mode == (mode_t)VNOVAL &&
925 vap->va_uid == (uid_t)VNOVAL &&
926 vap->va_gid == (gid_t)VNOVAL)
928 vap->va_size = VNOVAL;
932 * Disallow write attempts if the filesystem is
935 if (vp->v_mount->mnt_flag & MNT_RDONLY)
938 * We run vnode_pager_setsize() early (why?),
939 * we must set np->n_size now to avoid vinvalbuf
940 * V_SAVE races that might setsize a lower
943 mtx_lock(&np->n_mtx);
945 mtx_unlock(&np->n_mtx);
946 error = ncl_meta_setsize(vp, ap->a_cred, td,
948 mtx_lock(&np->n_mtx);
949 if (np->n_flag & NMODIFIED) {
951 mtx_unlock(&np->n_mtx);
952 if (vap->va_size == 0)
953 error = ncl_vinvalbuf(vp, 0, td, 1);
955 error = ncl_vinvalbuf(vp, V_SAVE, td, 1);
957 vnode_pager_setsize(vp, tsize);
961 * Call nfscl_delegmodtime() to set the modify time
962 * locally, as required.
964 nfscl_delegmodtime(vp);
966 mtx_unlock(&np->n_mtx);
968 * np->n_size has already been set to vap->va_size
969 * in ncl_meta_setsize(). We must set it again since
970 * nfs_loadattrcache() could be called through
971 * ncl_meta_setsize() and could modify np->n_size.
973 mtx_lock(&np->n_mtx);
974 np->n_vattr.na_size = np->n_size = vap->va_size;
975 mtx_unlock(&np->n_mtx);
978 mtx_lock(&np->n_mtx);
979 if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) &&
980 (np->n_flag & NMODIFIED) && vp->v_type == VREG) {
981 mtx_unlock(&np->n_mtx);
982 if ((error = ncl_vinvalbuf(vp, V_SAVE, td, 1)) != 0 &&
983 (error == EINTR || error == EIO))
986 mtx_unlock(&np->n_mtx);
988 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
989 if (error && vap->va_size != VNOVAL) {
990 mtx_lock(&np->n_mtx);
991 np->n_size = np->n_vattr.na_size = tsize;
992 vnode_pager_setsize(vp, tsize);
993 mtx_unlock(&np->n_mtx);
999 * Do an nfs setattr rpc.
1002 nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred,
1005 struct nfsnode *np = VTONFS(vp);
1006 int error, ret, attrflag, i;
1007 struct nfsvattr nfsva;
1009 if (NFS_ISV34(vp)) {
1010 mtx_lock(&np->n_mtx);
1011 for (i = 0; i < NFS_ACCESSCACHESIZE; i++)
1012 np->n_accesscache[i].stamp = 0;
1013 np->n_flag |= NDELEGMOD;
1014 mtx_unlock(&np->n_mtx);
1015 KDTRACE_NFS_ACCESSCACHE_FLUSH_DONE(vp);
1017 error = nfsrpc_setattr(vp, vap, NULL, cred, td, &nfsva, &attrflag,
1020 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1024 if (error && NFS_ISV4(vp))
1025 error = nfscl_maperr(td, error, vap->va_uid, vap->va_gid);
1030 * nfs lookup call, one step at a time...
1031 * First look in cache
1032 * If not found, unlock the directory nfsnode and do the rpc
1035 nfs_lookup(struct vop_lookup_args *ap)
1037 struct componentname *cnp = ap->a_cnp;
1038 struct vnode *dvp = ap->a_dvp;
1039 struct vnode **vpp = ap->a_vpp;
1040 struct mount *mp = dvp->v_mount;
1041 int flags = cnp->cn_flags;
1042 struct vnode *newvp;
1043 struct nfsmount *nmp;
1044 struct nfsnode *np, *newnp;
1045 int error = 0, attrflag, dattrflag, ltype, ncticks;
1046 struct thread *td = cnp->cn_thread;
1048 struct nfsvattr dnfsva, nfsva;
1050 struct timespec nctime;
1053 if ((flags & ISLASTCN) && (mp->mnt_flag & MNT_RDONLY) &&
1054 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
1056 if (dvp->v_type != VDIR)
1061 /* For NFSv4, wait until any remove is done. */
1062 mtx_lock(&np->n_mtx);
1063 while (NFSHASNFSV4(nmp) && (np->n_flag & NREMOVEINPROG)) {
1064 np->n_flag |= NREMOVEWANT;
1065 (void) msleep((caddr_t)np, &np->n_mtx, PZERO, "nfslkup", 0);
1067 mtx_unlock(&np->n_mtx);
1069 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0)
1071 error = cache_lookup(dvp, vpp, cnp, &nctime, &ncticks);
1072 if (error > 0 && error != ENOENT)
1076 * Lookups of "." are special and always return the
1077 * current directory. cache_lookup() already handles
1078 * associated locking bookkeeping, etc.
1080 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
1081 /* XXX: Is this really correct? */
1082 if (cnp->cn_nameiop != LOOKUP &&
1084 cnp->cn_flags |= SAVENAME;
1089 * We only accept a positive hit in the cache if the
1090 * change time of the file matches our cached copy.
1091 * Otherwise, we discard the cache entry and fallback
1092 * to doing a lookup RPC. We also only trust cache
1093 * entries for less than nm_nametimeo seconds.
1095 * To better handle stale file handles and attributes,
1096 * clear the attribute cache of this node if it is a
1097 * leaf component, part of an open() call, and not
1098 * locally modified before fetching the attributes.
1099 * This should allow stale file handles to be detected
1100 * here where we can fall back to a LOOKUP RPC to
1101 * recover rather than having nfs_open() detect the
1102 * stale file handle and failing open(2) with ESTALE.
1105 newnp = VTONFS(newvp);
1106 if (!(nmp->nm_flag & NFSMNT_NOCTO) &&
1107 (flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) &&
1108 !(newnp->n_flag & NMODIFIED)) {
1109 mtx_lock(&newnp->n_mtx);
1110 newnp->n_attrstamp = 0;
1111 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp);
1112 mtx_unlock(&newnp->n_mtx);
1114 if (nfscl_nodeleg(newvp, 0) == 0 ||
1115 ((u_int)(ticks - ncticks) < (nmp->nm_nametimeo * hz) &&
1116 VOP_GETATTR(newvp, &vattr, cnp->cn_cred) == 0 &&
1117 timespeccmp(&vattr.va_ctime, &nctime, ==))) {
1118 NFSINCRGLOBAL(newnfsstats.lookupcache_hits);
1119 if (cnp->cn_nameiop != LOOKUP &&
1121 cnp->cn_flags |= SAVENAME;
1130 } else if (error == ENOENT) {
1131 if (dvp->v_iflag & VI_DOOMED)
1134 * We only accept a negative hit in the cache if the
1135 * modification time of the parent directory matches
1136 * the cached copy in the name cache entry.
1137 * Otherwise, we discard all of the negative cache
1138 * entries for this directory. We also only trust
1139 * negative cache entries for up to nm_negnametimeo
1142 if ((u_int)(ticks - ncticks) < (nmp->nm_negnametimeo * hz) &&
1143 VOP_GETATTR(dvp, &vattr, cnp->cn_cred) == 0 &&
1144 timespeccmp(&vattr.va_mtime, &nctime, ==)) {
1145 NFSINCRGLOBAL(newnfsstats.lookupcache_hits);
1148 cache_purge_negative(dvp);
1153 NFSINCRGLOBAL(newnfsstats.lookupcache_misses);
1154 error = nfsrpc_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1155 cnp->cn_cred, td, &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1158 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1160 if (newvp != NULLVP) {
1165 if (error != ENOENT) {
1167 error = nfscl_maperr(td, error, (uid_t)0,
1172 /* The requested file was not found. */
1173 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
1174 (flags & ISLASTCN)) {
1176 * XXX: UFS does a full VOP_ACCESS(dvp,
1177 * VWRITE) here instead of just checking
1180 if (mp->mnt_flag & MNT_RDONLY)
1182 cnp->cn_flags |= SAVENAME;
1183 return (EJUSTRETURN);
1186 if ((cnp->cn_flags & MAKEENTRY) && cnp->cn_nameiop != CREATE &&
1189 * Cache the modification time of the parent
1190 * directory from the post-op attributes in
1191 * the name cache entry. The negative cache
1192 * entry will be ignored once the directory
1193 * has changed. Don't bother adding the entry
1194 * if the directory has already changed.
1196 mtx_lock(&np->n_mtx);
1197 if (timespeccmp(&np->n_vattr.na_mtime,
1198 &dnfsva.na_mtime, ==)) {
1199 mtx_unlock(&np->n_mtx);
1200 cache_enter_time(dvp, NULL, cnp,
1201 &dnfsva.na_mtime, NULL);
1203 mtx_unlock(&np->n_mtx);
1209 * Handle RENAME case...
1211 if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) {
1212 if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
1213 FREE((caddr_t)nfhp, M_NFSFH);
1216 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL,
1222 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1225 cnp->cn_flags |= SAVENAME;
1229 if (flags & ISDOTDOT) {
1230 ltype = NFSVOPISLOCKED(dvp);
1231 error = vfs_busy(mp, MBF_NOWAIT);
1234 NFSVOPUNLOCK(dvp, 0);
1235 error = vfs_busy(mp, 0);
1236 NFSVOPLOCK(dvp, ltype | LK_RETRY);
1238 if (error == 0 && (dvp->v_iflag & VI_DOOMED)) {
1245 NFSVOPUNLOCK(dvp, 0);
1246 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL,
1252 NFSVOPLOCK(dvp, ltype | LK_RETRY);
1253 if (dvp->v_iflag & VI_DOOMED) {
1265 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1267 } else if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
1268 FREE((caddr_t)nfhp, M_NFSFH);
1272 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1275 error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, NULL,
1281 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1283 else if ((flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) &&
1284 !(np->n_flag & NMODIFIED)) {
1286 * Flush the attribute cache when opening a
1287 * leaf node to ensure that fresh attributes
1288 * are fetched in nfs_open() since we did not
1289 * fetch attributes from the LOOKUP reply.
1291 mtx_lock(&np->n_mtx);
1292 np->n_attrstamp = 0;
1293 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp);
1294 mtx_unlock(&np->n_mtx);
1297 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
1298 cnp->cn_flags |= SAVENAME;
1299 if ((cnp->cn_flags & MAKEENTRY) &&
1300 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN)) &&
1301 attrflag != 0 && (newvp->v_type != VDIR || dattrflag != 0))
1302 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime,
1303 newvp->v_type != VDIR ? NULL : &dnfsva.na_ctime);
1310 * Just call ncl_bioread() to do the work.
1313 nfs_read(struct vop_read_args *ap)
1315 struct vnode *vp = ap->a_vp;
1317 switch (vp->v_type) {
1319 return (ncl_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
1323 return (EOPNOTSUPP);
1331 nfs_readlink(struct vop_readlink_args *ap)
1333 struct vnode *vp = ap->a_vp;
1335 if (vp->v_type != VLNK)
1337 return (ncl_bioread(vp, ap->a_uio, 0, ap->a_cred));
1341 * Do a readlink rpc.
1342 * Called by ncl_doio() from below the buffer cache.
1345 ncl_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1347 int error, ret, attrflag;
1348 struct nfsvattr nfsva;
1350 error = nfsrpc_readlink(vp, uiop, cred, uiop->uio_td, &nfsva,
1353 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1357 if (error && NFS_ISV4(vp))
1358 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1367 ncl_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
1369 int error, ret, attrflag;
1370 struct nfsvattr nfsva;
1371 struct nfsmount *nmp;
1373 nmp = VFSTONFS(vnode_mount(vp));
1376 if (NFSHASPNFS(nmp))
1377 error = nfscl_doiods(vp, uiop, NULL, NULL,
1378 NFSV4OPEN_ACCESSREAD, cred, uiop->uio_td);
1379 NFSCL_DEBUG(4, "readrpc: aft doiods=%d\n", error);
1381 error = nfsrpc_read(vp, uiop, cred, uiop->uio_td, &nfsva,
1384 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
1388 if (error && NFS_ISV4(vp))
1389 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1397 ncl_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
1398 int *iomode, int *must_commit, int called_from_strategy)
1400 struct nfsvattr nfsva;
1401 int error, attrflag, ret;
1402 struct nfsmount *nmp;
1404 nmp = VFSTONFS(vnode_mount(vp));
1407 if (NFSHASPNFS(nmp))
1408 error = nfscl_doiods(vp, uiop, iomode, must_commit,
1409 NFSV4OPEN_ACCESSWRITE, cred, uiop->uio_td);
1410 NFSCL_DEBUG(4, "writerpc: aft doiods=%d\n", error);
1412 error = nfsrpc_write(vp, uiop, iomode, must_commit, cred,
1413 uiop->uio_td, &nfsva, &attrflag, NULL,
1414 called_from_strategy);
1416 if (VTONFS(vp)->n_flag & ND_NFSV4)
1417 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 1,
1420 ret = nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
1426 *iomode = NFSWRITE_FILESYNC;
1427 if (error && NFS_ISV4(vp))
1428 error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
1434 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1435 * mode set to specify the file type and the size field for rdev.
1438 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1441 struct nfsvattr nfsva, dnfsva;
1442 struct vnode *newvp = NULL;
1443 struct nfsnode *np = NULL, *dnp;
1446 int error = 0, attrflag, dattrflag;
1449 if (vap->va_type == VCHR || vap->va_type == VBLK)
1450 rdev = vap->va_rdev;
1451 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1454 return (EOPNOTSUPP);
1455 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1457 error = nfsrpc_mknod(dvp, cnp->cn_nameptr, cnp->cn_namelen, vap,
1458 rdev, vap->va_type, cnp->cn_cred, cnp->cn_thread, &dnfsva,
1459 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
1462 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1463 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1464 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1467 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1468 cnp->cn_thread, &np, NULL, LK_EXCLUSIVE);
1471 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1474 if (attrflag != 0) {
1475 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1483 } else if (NFS_ISV4(dvp)) {
1484 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1488 mtx_lock(&dnp->n_mtx);
1489 dnp->n_flag |= NMODIFIED;
1491 dnp->n_attrstamp = 0;
1492 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1494 mtx_unlock(&dnp->n_mtx);
1500 * just call nfs_mknodrpc() to do the work.
1504 nfs_mknod(struct vop_mknod_args *ap)
1506 return (nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap));
1509 static struct mtx nfs_cverf_mtx;
1510 MTX_SYSINIT(nfs_cverf_mtx, &nfs_cverf_mtx, "NFS create verifier mutex",
1516 static nfsquad_t cverf;
1518 static int cverf_initialized = 0;
1520 mtx_lock(&nfs_cverf_mtx);
1521 if (cverf_initialized == 0) {
1522 cverf.lval[0] = arc4random();
1523 cverf.lval[1] = arc4random();
1524 cverf_initialized = 1;
1528 mtx_unlock(&nfs_cverf_mtx);
1534 * nfs file create call
1537 nfs_create(struct vop_create_args *ap)
1539 struct vnode *dvp = ap->a_dvp;
1540 struct vattr *vap = ap->a_vap;
1541 struct componentname *cnp = ap->a_cnp;
1542 struct nfsnode *np = NULL, *dnp;
1543 struct vnode *newvp = NULL;
1544 struct nfsmount *nmp;
1545 struct nfsvattr dnfsva, nfsva;
1548 int error = 0, attrflag, dattrflag, fmode = 0;
1552 * Oops, not for me..
1554 if (vap->va_type == VSOCK)
1555 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1557 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
1559 if (vap->va_vaflags & VA_EXCLUSIVE)
1562 nmp = VFSTONFS(vnode_mount(dvp));
1564 /* For NFSv4, wait until any remove is done. */
1565 mtx_lock(&dnp->n_mtx);
1566 while (NFSHASNFSV4(nmp) && (dnp->n_flag & NREMOVEINPROG)) {
1567 dnp->n_flag |= NREMOVEWANT;
1568 (void) msleep((caddr_t)dnp, &dnp->n_mtx, PZERO, "nfscrt", 0);
1570 mtx_unlock(&dnp->n_mtx);
1572 cverf = nfs_get_cverf();
1573 error = nfsrpc_create(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1574 vap, cverf, fmode, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva,
1575 &nfhp, &attrflag, &dattrflag, NULL);
1578 (void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
1579 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread,
1580 &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
1583 error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
1584 cnp->cn_thread, &np, NULL, LK_EXCLUSIVE);
1587 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1591 error = nfsrpc_getattr(newvp, cnp->cn_cred,
1592 cnp->cn_thread, &nfsva, NULL);
1594 error = nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
1598 if (newvp != NULL) {
1602 if (NFS_ISV34(dvp) && (fmode & O_EXCL) &&
1603 error == NFSERR_NOTSUPP) {
1607 } else if (NFS_ISV34(dvp) && (fmode & O_EXCL)) {
1608 if (nfscl_checksattr(vap, &nfsva)) {
1610 * We are normally called with only a partially
1611 * initialized VAP. Since the NFSv3 spec says that
1612 * the server may use the file attributes to
1613 * store the verifier, the spec requires us to do a
1614 * SETATTR RPC. FreeBSD servers store the verifier in
1615 * atime, but we can't really assume that all servers
1616 * will so we ensure that our SETATTR sets both atime
1619 if (vap->va_mtime.tv_sec == VNOVAL)
1620 vfs_timestamp(&vap->va_mtime);
1621 if (vap->va_atime.tv_sec == VNOVAL)
1622 vap->va_atime = vap->va_mtime;
1623 error = nfsrpc_setattr(newvp, vap, NULL, cnp->cn_cred,
1624 cnp->cn_thread, &nfsva, &attrflag, NULL);
1625 if (error && (vap->va_uid != (uid_t)VNOVAL ||
1626 vap->va_gid != (gid_t)VNOVAL)) {
1627 /* try again without setting uid/gid */
1628 vap->va_uid = (uid_t)VNOVAL;
1629 vap->va_gid = (uid_t)VNOVAL;
1630 error = nfsrpc_setattr(newvp, vap, NULL,
1631 cnp->cn_cred, cnp->cn_thread, &nfsva,
1635 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
1642 if ((cnp->cn_flags & MAKEENTRY) && attrflag)
1643 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime,
1646 } else if (NFS_ISV4(dvp)) {
1647 error = nfscl_maperr(cnp->cn_thread, error, vap->va_uid,
1650 mtx_lock(&dnp->n_mtx);
1651 dnp->n_flag |= NMODIFIED;
1653 dnp->n_attrstamp = 0;
1654 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1656 mtx_unlock(&dnp->n_mtx);
1661 * nfs file remove call
1662 * To try and make nfs semantics closer to ufs semantics, a file that has
1663 * other processes using the vnode is renamed instead of removed and then
1664 * removed later on the last close.
1665 * - If v_usecount > 1
1666 * If a rename is not already in the works
1667 * call nfs_sillyrename() to set it up
1672 nfs_remove(struct vop_remove_args *ap)
1674 struct vnode *vp = ap->a_vp;
1675 struct vnode *dvp = ap->a_dvp;
1676 struct componentname *cnp = ap->a_cnp;
1677 struct nfsnode *np = VTONFS(vp);
1681 KASSERT((cnp->cn_flags & HASBUF) != 0, ("nfs_remove: no name"));
1682 KASSERT(vrefcnt(vp) > 0, ("nfs_remove: bad v_usecount"));
1683 if (vp->v_type == VDIR)
1685 else if (vrefcnt(vp) == 1 || (np->n_sillyrename &&
1686 VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 0 &&
1687 vattr.va_nlink > 1)) {
1689 * Purge the name cache so that the chance of a lookup for
1690 * the name succeeding while the remove is in progress is
1691 * minimized. Without node locking it can still happen, such
1692 * that an I/O op returns ESTALE, but since you get this if
1693 * another host removes the file..
1697 * throw away biocache buffers, mainly to avoid
1698 * unnecessary delayed writes later.
1700 error = ncl_vinvalbuf(vp, 0, cnp->cn_thread, 1);
1702 if (error != EINTR && error != EIO)
1703 error = nfs_removerpc(dvp, vp, cnp->cn_nameptr,
1704 cnp->cn_namelen, cnp->cn_cred, cnp->cn_thread);
1706 * Kludge City: If the first reply to the remove rpc is lost..
1707 * the reply to the retransmitted request will be ENOENT
1708 * since the file was in fact removed
1709 * Therefore, we cheat and return success.
1711 if (error == ENOENT)
1713 } else if (!np->n_sillyrename)
1714 error = nfs_sillyrename(dvp, vp, cnp);
1715 mtx_lock(&np->n_mtx);
1716 np->n_attrstamp = 0;
1717 mtx_unlock(&np->n_mtx);
1718 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
1723 * nfs file remove rpc called from nfs_inactive
1726 ncl_removeit(struct sillyrename *sp, struct vnode *vp)
1729 * Make sure that the directory vnode is still valid.
1730 * XXX we should lock sp->s_dvp here.
1732 if (sp->s_dvp->v_type == VBAD)
1734 return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen,
1739 * Nfs remove rpc, called from nfs_remove() and ncl_removeit().
1742 nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
1743 int namelen, struct ucred *cred, struct thread *td)
1745 struct nfsvattr dnfsva;
1746 struct nfsnode *dnp = VTONFS(dvp);
1747 int error = 0, dattrflag;
1749 mtx_lock(&dnp->n_mtx);
1750 dnp->n_flag |= NREMOVEINPROG;
1751 mtx_unlock(&dnp->n_mtx);
1752 error = nfsrpc_remove(dvp, name, namelen, vp, cred, td, &dnfsva,
1754 mtx_lock(&dnp->n_mtx);
1755 if ((dnp->n_flag & NREMOVEWANT)) {
1756 dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG);
1757 mtx_unlock(&dnp->n_mtx);
1758 wakeup((caddr_t)dnp);
1760 dnp->n_flag &= ~NREMOVEINPROG;
1761 mtx_unlock(&dnp->n_mtx);
1764 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
1765 mtx_lock(&dnp->n_mtx);
1766 dnp->n_flag |= NMODIFIED;
1768 dnp->n_attrstamp = 0;
1769 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
1771 mtx_unlock(&dnp->n_mtx);
1772 if (error && NFS_ISV4(dvp))
1773 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1778 * nfs file rename call
1781 nfs_rename(struct vop_rename_args *ap)
1783 struct vnode *fvp = ap->a_fvp;
1784 struct vnode *tvp = ap->a_tvp;
1785 struct vnode *fdvp = ap->a_fdvp;
1786 struct vnode *tdvp = ap->a_tdvp;
1787 struct componentname *tcnp = ap->a_tcnp;
1788 struct componentname *fcnp = ap->a_fcnp;
1789 struct nfsnode *fnp = VTONFS(ap->a_fvp);
1790 struct nfsnode *tdnp = VTONFS(ap->a_tdvp);
1791 struct nfsv4node *newv4 = NULL;
1794 KASSERT((tcnp->cn_flags & HASBUF) != 0 &&
1795 (fcnp->cn_flags & HASBUF) != 0, ("nfs_rename: no name"));
1796 /* Check for cross-device rename */
1797 if ((fvp->v_mount != tdvp->v_mount) ||
1798 (tvp && (fvp->v_mount != tvp->v_mount))) {
1804 ncl_printf("nfs_rename: fvp == tvp (can't happen)\n");
1808 if ((error = NFSVOPLOCK(fvp, LK_EXCLUSIVE)) != 0)
1812 * We have to flush B_DELWRI data prior to renaming
1813 * the file. If we don't, the delayed-write buffers
1814 * can be flushed out later after the file has gone stale
1815 * under NFSV3. NFSV2 does not have this problem because
1816 * ( as far as I can tell ) it flushes dirty buffers more
1819 * Skip the rename operation if the fsync fails, this can happen
1820 * due to the server's volume being full, when we pushed out data
1821 * that was written back to our cache earlier. Not checking for
1822 * this condition can result in potential (silent) data loss.
1824 error = VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_thread);
1825 NFSVOPUNLOCK(fvp, 0);
1827 error = VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_thread);
1832 * If the tvp exists and is in use, sillyrename it before doing the
1833 * rename of the new file over it.
1834 * XXX Can't sillyrename a directory.
1836 if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename &&
1837 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1842 error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1843 tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1846 if (error == 0 && NFS_ISV4(tdvp)) {
1848 * For NFSv4, check to see if it is the same name and
1849 * replace the name, if it is different.
1851 MALLOC(newv4, struct nfsv4node *,
1852 sizeof (struct nfsv4node) +
1853 tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1,
1854 M_NFSV4NODE, M_WAITOK);
1855 mtx_lock(&tdnp->n_mtx);
1856 mtx_lock(&fnp->n_mtx);
1857 if (fnp->n_v4 != NULL && fvp->v_type == VREG &&
1858 (fnp->n_v4->n4_namelen != tcnp->cn_namelen ||
1859 NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4),
1860 tcnp->cn_namelen) ||
1861 tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen ||
1862 NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1863 tdnp->n_fhp->nfh_len))) {
1865 { char nnn[100]; int nnnl;
1866 nnnl = (tcnp->cn_namelen < 100) ? tcnp->cn_namelen : 99;
1867 bcopy(tcnp->cn_nameptr, nnn, nnnl);
1869 printf("ren replace=%s\n",nnn);
1872 FREE((caddr_t)fnp->n_v4, M_NFSV4NODE);
1875 fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len;
1876 fnp->n_v4->n4_namelen = tcnp->cn_namelen;
1877 NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
1878 tdnp->n_fhp->nfh_len);
1879 NFSBCOPY(tcnp->cn_nameptr,
1880 NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen);
1882 mtx_unlock(&tdnp->n_mtx);
1883 mtx_unlock(&fnp->n_mtx);
1885 FREE((caddr_t)newv4, M_NFSV4NODE);
1888 if (fvp->v_type == VDIR) {
1889 if (tvp != NULL && tvp->v_type == VDIR)
1904 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1906 if (error == ENOENT)
1912 * nfs file rename rpc called from nfs_remove() above
1915 nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp,
1916 struct sillyrename *sp)
1919 return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen,
1920 sdvp, NULL, sp->s_name, sp->s_namlen, scnp->cn_cred,
1925 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1928 nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr,
1929 int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr,
1930 int tnamelen, struct ucred *cred, struct thread *td)
1932 struct nfsvattr fnfsva, tnfsva;
1933 struct nfsnode *fdnp = VTONFS(fdvp);
1934 struct nfsnode *tdnp = VTONFS(tdvp);
1935 int error = 0, fattrflag, tattrflag;
1937 error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp,
1938 tnameptr, tnamelen, cred, td, &fnfsva, &tnfsva, &fattrflag,
1939 &tattrflag, NULL, NULL);
1940 mtx_lock(&fdnp->n_mtx);
1941 fdnp->n_flag |= NMODIFIED;
1942 if (fattrflag != 0) {
1943 mtx_unlock(&fdnp->n_mtx);
1944 (void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, NULL, 0, 1);
1946 fdnp->n_attrstamp = 0;
1947 mtx_unlock(&fdnp->n_mtx);
1948 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(fdvp);
1950 mtx_lock(&tdnp->n_mtx);
1951 tdnp->n_flag |= NMODIFIED;
1952 if (tattrflag != 0) {
1953 mtx_unlock(&tdnp->n_mtx);
1954 (void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, NULL, 0, 1);
1956 tdnp->n_attrstamp = 0;
1957 mtx_unlock(&tdnp->n_mtx);
1958 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
1960 if (error && NFS_ISV4(fdvp))
1961 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
1966 * nfs hard link create call
1969 nfs_link(struct vop_link_args *ap)
1971 struct vnode *vp = ap->a_vp;
1972 struct vnode *tdvp = ap->a_tdvp;
1973 struct componentname *cnp = ap->a_cnp;
1974 struct nfsnode *np, *tdnp;
1975 struct nfsvattr nfsva, dnfsva;
1976 int error = 0, attrflag, dattrflag;
1978 if (vp->v_mount != tdvp->v_mount) {
1983 * Push all writes to the server, so that the attribute cache
1984 * doesn't get "out of sync" with the server.
1985 * XXX There should be a better way!
1987 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_thread);
1989 error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen,
1990 cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &attrflag,
1992 tdnp = VTONFS(tdvp);
1993 mtx_lock(&tdnp->n_mtx);
1994 tdnp->n_flag |= NMODIFIED;
1995 if (dattrflag != 0) {
1996 mtx_unlock(&tdnp->n_mtx);
1997 (void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, NULL, 0, 1);
1999 tdnp->n_attrstamp = 0;
2000 mtx_unlock(&tdnp->n_mtx);
2001 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
2004 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2007 mtx_lock(&np->n_mtx);
2008 np->n_attrstamp = 0;
2009 mtx_unlock(&np->n_mtx);
2010 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
2013 * If negative lookup caching is enabled, I might as well
2014 * add an entry for this node. Not necessary for correctness,
2015 * but if negative caching is enabled, then the system
2016 * must care about lookup caching hit rate, so...
2018 if (VFSTONFS(vp->v_mount)->nm_negnametimeo != 0 &&
2019 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) {
2020 cache_enter_time(tdvp, vp, cnp, &nfsva.na_ctime, NULL);
2022 if (error && NFS_ISV4(vp))
2023 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
2029 * nfs symbolic link create call
2032 nfs_symlink(struct vop_symlink_args *ap)
2034 struct vnode *dvp = ap->a_dvp;
2035 struct vattr *vap = ap->a_vap;
2036 struct componentname *cnp = ap->a_cnp;
2037 struct nfsvattr nfsva, dnfsva;
2039 struct nfsnode *np = NULL, *dnp;
2040 struct vnode *newvp = NULL;
2041 int error = 0, attrflag, dattrflag, ret;
2043 vap->va_type = VLNK;
2044 error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2045 ap->a_target, vap, cnp->cn_cred, cnp->cn_thread, &dnfsva,
2046 &nfsva, &nfhp, &attrflag, &dattrflag, NULL);
2048 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
2049 &np, NULL, LK_EXCLUSIVE);
2055 if (newvp != NULL) {
2057 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2059 } else if (!error) {
2061 * If we do not have an error and we could not extract the
2062 * newvp from the response due to the request being NFSv2, we
2063 * have to do a lookup in order to obtain a newvp to return.
2065 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2066 cnp->cn_cred, cnp->cn_thread, &np);
2074 error = nfscl_maperr(cnp->cn_thread, error,
2075 vap->va_uid, vap->va_gid);
2081 mtx_lock(&dnp->n_mtx);
2082 dnp->n_flag |= NMODIFIED;
2083 if (dattrflag != 0) {
2084 mtx_unlock(&dnp->n_mtx);
2085 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2087 dnp->n_attrstamp = 0;
2088 mtx_unlock(&dnp->n_mtx);
2089 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2092 * If negative lookup caching is enabled, I might as well
2093 * add an entry for this node. Not necessary for correctness,
2094 * but if negative caching is enabled, then the system
2095 * must care about lookup caching hit rate, so...
2097 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
2098 (cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) {
2099 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime, NULL);
2108 nfs_mkdir(struct vop_mkdir_args *ap)
2110 struct vnode *dvp = ap->a_dvp;
2111 struct vattr *vap = ap->a_vap;
2112 struct componentname *cnp = ap->a_cnp;
2113 struct nfsnode *np = NULL, *dnp;
2114 struct vnode *newvp = NULL;
2117 struct nfsvattr nfsva, dnfsva;
2118 int error = 0, attrflag, dattrflag, ret;
2120 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0)
2122 vap->va_type = VDIR;
2123 error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2124 vap, cnp->cn_cred, cnp->cn_thread, &dnfsva, &nfsva, &nfhp,
2125 &attrflag, &dattrflag, NULL);
2127 mtx_lock(&dnp->n_mtx);
2128 dnp->n_flag |= NMODIFIED;
2129 if (dattrflag != 0) {
2130 mtx_unlock(&dnp->n_mtx);
2131 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2133 dnp->n_attrstamp = 0;
2134 mtx_unlock(&dnp->n_mtx);
2135 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2138 ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, cnp->cn_thread,
2139 &np, NULL, LK_EXCLUSIVE);
2143 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
2148 if (!error && newvp == NULL) {
2149 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2150 cnp->cn_cred, cnp->cn_thread, &np);
2153 if (newvp->v_type != VDIR)
2161 error = nfscl_maperr(cnp->cn_thread, error,
2162 vap->va_uid, vap->va_gid);
2165 * If negative lookup caching is enabled, I might as well
2166 * add an entry for this node. Not necessary for correctness,
2167 * but if negative caching is enabled, then the system
2168 * must care about lookup caching hit rate, so...
2170 if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
2171 (cnp->cn_flags & MAKEENTRY) &&
2172 attrflag != 0 && dattrflag != 0)
2173 cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime,
2181 * nfs remove directory call
2184 nfs_rmdir(struct vop_rmdir_args *ap)
2186 struct vnode *vp = ap->a_vp;
2187 struct vnode *dvp = ap->a_dvp;
2188 struct componentname *cnp = ap->a_cnp;
2189 struct nfsnode *dnp;
2190 struct nfsvattr dnfsva;
2191 int error, dattrflag;
2195 error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2196 cnp->cn_cred, cnp->cn_thread, &dnfsva, &dattrflag, NULL);
2198 mtx_lock(&dnp->n_mtx);
2199 dnp->n_flag |= NMODIFIED;
2200 if (dattrflag != 0) {
2201 mtx_unlock(&dnp->n_mtx);
2202 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2204 dnp->n_attrstamp = 0;
2205 mtx_unlock(&dnp->n_mtx);
2206 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
2211 if (error && NFS_ISV4(dvp))
2212 error = nfscl_maperr(cnp->cn_thread, error, (uid_t)0,
2215 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2217 if (error == ENOENT)
2226 nfs_readdir(struct vop_readdir_args *ap)
2228 struct vnode *vp = ap->a_vp;
2229 struct nfsnode *np = VTONFS(vp);
2230 struct uio *uio = ap->a_uio;
2235 if (ap->a_eofflag != NULL)
2237 if (vp->v_type != VDIR)
2241 * First, check for hit on the EOF offset cache
2243 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2244 (np->n_flag & NMODIFIED) == 0) {
2245 if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) {
2246 mtx_lock(&np->n_mtx);
2247 if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) ||
2248 !NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
2249 mtx_unlock(&np->n_mtx);
2250 NFSINCRGLOBAL(newnfsstats.direofcache_hits);
2251 if (ap->a_eofflag != NULL)
2255 mtx_unlock(&np->n_mtx);
2260 * Call ncl_bioread() to do the real work.
2262 tresid = uio->uio_resid;
2263 error = ncl_bioread(vp, uio, 0, ap->a_cred);
2265 if (!error && uio->uio_resid == tresid) {
2266 NFSINCRGLOBAL(newnfsstats.direofcache_misses);
2267 if (ap->a_eofflag != NULL)
2275 * Called from below the buffer cache by ncl_doio().
2278 ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2281 struct nfsvattr nfsva;
2282 nfsuint64 *cookiep, cookie;
2283 struct nfsnode *dnp = VTONFS(vp);
2284 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2285 int error = 0, eof, attrflag;
2287 KASSERT(uiop->uio_iovcnt == 1 &&
2288 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
2289 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
2290 ("nfs readdirrpc bad uio"));
2293 * If there is no cookie, assume directory was stale.
2295 ncl_dircookie_lock(dnp);
2296 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2299 ncl_dircookie_unlock(dnp);
2301 ncl_dircookie_unlock(dnp);
2302 return (NFSERR_BAD_COOKIE);
2305 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2306 (void)ncl_fsinfo(nmp, vp, cred, td);
2308 error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva,
2309 &attrflag, &eof, NULL);
2311 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2315 * We are now either at the end of the directory or have filled
2319 dnp->n_direofoffset = uiop->uio_offset;
2321 if (uiop->uio_resid > 0)
2322 ncl_printf("EEK! readdirrpc resid > 0\n");
2323 ncl_dircookie_lock(dnp);
2324 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2326 ncl_dircookie_unlock(dnp);
2328 } else if (NFS_ISV4(vp)) {
2329 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2335 * NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc().
2338 ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
2341 struct nfsvattr nfsva;
2342 nfsuint64 *cookiep, cookie;
2343 struct nfsnode *dnp = VTONFS(vp);
2344 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2345 int error = 0, attrflag, eof;
2347 KASSERT(uiop->uio_iovcnt == 1 &&
2348 (uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
2349 (uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
2350 ("nfs readdirplusrpc bad uio"));
2353 * If there is no cookie, assume directory was stale.
2355 ncl_dircookie_lock(dnp);
2356 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
2359 ncl_dircookie_unlock(dnp);
2361 ncl_dircookie_unlock(dnp);
2362 return (NFSERR_BAD_COOKIE);
2365 if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
2366 (void)ncl_fsinfo(nmp, vp, cred, td);
2367 error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva,
2368 &attrflag, &eof, NULL);
2370 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1);
2374 * We are now either at end of the directory or have filled the
2378 dnp->n_direofoffset = uiop->uio_offset;
2380 if (uiop->uio_resid > 0)
2381 ncl_printf("EEK! readdirplusrpc resid > 0\n");
2382 ncl_dircookie_lock(dnp);
2383 cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
2385 ncl_dircookie_unlock(dnp);
2387 } else if (NFS_ISV4(vp)) {
2388 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2394 * Silly rename. To make the NFS filesystem that is stateless look a little
2395 * more like the "ufs" a remove of an active vnode is translated to a rename
2396 * to a funny looking filename that is removed by nfs_inactive on the
2397 * nfsnode. There is the potential for another process on a different client
2398 * to create the same funny name between the nfs_lookitup() fails and the
2399 * nfs_rename() completes, but...
2402 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2404 struct sillyrename *sp;
2408 unsigned int lticks;
2412 KASSERT(vp->v_type != VDIR, ("nfs: sillyrename dir"));
2413 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2414 M_NEWNFSREQ, M_WAITOK);
2415 sp->s_cred = crhold(cnp->cn_cred);
2420 * Fudge together a funny name.
2421 * Changing the format of the funny name to accomodate more
2422 * sillynames per directory.
2423 * The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is
2424 * CPU ticks since boot.
2426 pid = cnp->cn_thread->td_proc->p_pid;
2427 lticks = (unsigned int)ticks;
2429 sp->s_namlen = sprintf(sp->s_name,
2430 ".nfs.%08x.%04x4.4", lticks,
2432 if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2433 cnp->cn_thread, NULL))
2437 error = nfs_renameit(dvp, vp, cnp, sp);
2440 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2441 cnp->cn_thread, &np);
2442 np->n_sillyrename = sp;
2447 free((caddr_t)sp, M_NEWNFSREQ);
2452 * Look up a file name and optionally either update the file handle or
2453 * allocate an nfsnode, depending on the value of npp.
2454 * npp == NULL --> just do the lookup
2455 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2457 * *npp != NULL --> update the file handle in the vnode
2460 nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred,
2461 struct thread *td, struct nfsnode **npp)
2463 struct vnode *newvp = NULL, *vp;
2464 struct nfsnode *np, *dnp = VTONFS(dvp);
2465 struct nfsfh *nfhp, *onfhp;
2466 struct nfsvattr nfsva, dnfsva;
2467 struct componentname cn;
2468 int error = 0, attrflag, dattrflag;
2471 error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva,
2472 &nfhp, &attrflag, &dattrflag, NULL);
2474 (void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, NULL, 0, 1);
2475 if (npp && !error) {
2480 * For NFSv4, check to see if it is the same name and
2481 * replace the name, if it is different.
2483 if (np->n_v4 != NULL && nfsva.na_type == VREG &&
2484 (np->n_v4->n4_namelen != len ||
2485 NFSBCMP(name, NFS4NODENAME(np->n_v4), len) ||
2486 dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
2487 NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2488 dnp->n_fhp->nfh_len))) {
2490 { char nnn[100]; int nnnl;
2491 nnnl = (len < 100) ? len : 99;
2492 bcopy(name, nnn, nnnl);
2494 printf("replace=%s\n",nnn);
2497 FREE((caddr_t)np->n_v4, M_NFSV4NODE);
2498 MALLOC(np->n_v4, struct nfsv4node *,
2499 sizeof (struct nfsv4node) +
2500 dnp->n_fhp->nfh_len + len - 1,
2501 M_NFSV4NODE, M_WAITOK);
2502 np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
2503 np->n_v4->n4_namelen = len;
2504 NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
2505 dnp->n_fhp->nfh_len);
2506 NFSBCOPY(name, NFS4NODENAME(np->n_v4), len);
2508 hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len,
2512 * Rehash node for new file handle.
2514 vfs_hash_rehash(vp, hash);
2517 FREE((caddr_t)onfhp, M_NFSFH);
2519 } else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) {
2520 FREE((caddr_t)nfhp, M_NFSFH);
2524 cn.cn_nameptr = name;
2525 cn.cn_namelen = len;
2526 error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td,
2527 &np, NULL, LK_EXCLUSIVE);
2532 if (!attrflag && *npp == NULL) {
2540 (void) nfscl_loadattrcache(&newvp, &nfsva, NULL, NULL,
2543 if (npp && *npp == NULL) {
2554 if (error && NFS_ISV4(dvp))
2555 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2560 * Nfs Version 3 and 4 commit rpc
2563 ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred,
2566 struct nfsvattr nfsva;
2567 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2568 int error, attrflag;
2570 mtx_lock(&nmp->nm_mtx);
2571 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) {
2572 mtx_unlock(&nmp->nm_mtx);
2575 mtx_unlock(&nmp->nm_mtx);
2576 error = nfsrpc_commit(vp, offset, cnt, cred, td, &nfsva,
2579 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL,
2581 if (error != 0 && NFS_ISV4(vp))
2582 error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
2588 * For async requests when nfsiod(s) are running, queue the request by
2589 * calling ncl_asyncio(), otherwise just all ncl_doio() to do the
2593 nfs_strategy(struct vop_strategy_args *ap)
2595 struct buf *bp = ap->a_bp;
2598 KASSERT(!(bp->b_flags & B_DONE),
2599 ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2600 BUF_ASSERT_HELD(bp);
2602 if (bp->b_iocmd == BIO_READ)
2608 * If the op is asynchronous and an i/o daemon is waiting
2609 * queue the request, wake it up and wait for completion
2610 * otherwise just do it ourselves.
2612 if ((bp->b_flags & B_ASYNC) == 0 ||
2613 ncl_asyncio(VFSTONFS(ap->a_vp->v_mount), bp, NOCRED, curthread))
2614 (void) ncl_doio(ap->a_vp, bp, cr, curthread, 1);
2619 * fsync vnode op. Just call ncl_flush() with commit == 1.
2623 nfs_fsync(struct vop_fsync_args *ap)
2626 if (ap->a_vp->v_type != VREG) {
2628 * For NFS, metadata is changed synchronously on the server,
2629 * so there is nothing to flush. Also, ncl_flush() clears
2630 * the NMODIFIED flag and that shouldn't be done here for
2635 return (ncl_flush(ap->a_vp, ap->a_waitfor, NULL, ap->a_td, 1, 0));
2639 * Flush all the blocks associated with a vnode.
2640 * Walk through the buffer pool and push any dirty pages
2641 * associated with the vnode.
2642 * If the called_from_renewthread argument is TRUE, it has been called
2643 * from the NFSv4 renew thread and, as such, cannot block indefinitely
2644 * waiting for a buffer write to complete.
2647 ncl_flush(struct vnode *vp, int waitfor, struct ucred *cred, struct thread *td,
2648 int commit, int called_from_renewthread)
2650 struct nfsnode *np = VTONFS(vp);
2654 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2655 int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2656 int passone = 1, trycnt = 0;
2657 u_quad_t off, endoff, toff;
2658 struct ucred* wcred = NULL;
2659 struct buf **bvec = NULL;
2661 #ifndef NFS_COMMITBVECSIZ
2662 #define NFS_COMMITBVECSIZ 20
2664 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2665 int bvecsize = 0, bveccount;
2667 if (called_from_renewthread != 0)
2669 if (nmp->nm_flag & NFSMNT_INT)
2675 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2676 * server, but has not been committed to stable storage on the server
2677 * yet. On the first pass, the byte range is worked out and the commit
2678 * rpc is done. On the second pass, ncl_writebp() is called to do the
2685 if (NFS_ISV34(vp) && commit) {
2686 if (bvec != NULL && bvec != bvec_on_stack)
2689 * Count up how many buffers waiting for a commit.
2693 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2694 if (!BUF_ISLOCKED(bp) &&
2695 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2696 == (B_DELWRI | B_NEEDCOMMIT))
2700 * Allocate space to remember the list of bufs to commit. It is
2701 * important to use M_NOWAIT here to avoid a race with nfs_write.
2702 * If we can't get memory (for whatever reason), we will end up
2703 * committing the buffers one-by-one in the loop below.
2705 if (bveccount > NFS_COMMITBVECSIZ) {
2707 * Release the vnode interlock to avoid a lock
2711 bvec = (struct buf **)
2712 malloc(bveccount * sizeof(struct buf *),
2716 bvec = bvec_on_stack;
2717 bvecsize = NFS_COMMITBVECSIZ;
2719 bvecsize = bveccount;
2721 bvec = bvec_on_stack;
2722 bvecsize = NFS_COMMITBVECSIZ;
2724 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2725 if (bvecpos >= bvecsize)
2727 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2728 nbp = TAILQ_NEXT(bp, b_bobufs);
2731 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2732 (B_DELWRI | B_NEEDCOMMIT)) {
2734 nbp = TAILQ_NEXT(bp, b_bobufs);
2740 * Work out if all buffers are using the same cred
2741 * so we can deal with them all with one commit.
2743 * NOTE: we are not clearing B_DONE here, so we have
2744 * to do it later on in this routine if we intend to
2745 * initiate I/O on the bp.
2747 * Note: to avoid loopback deadlocks, we do not
2748 * assign b_runningbufspace.
2751 wcred = bp->b_wcred;
2752 else if (wcred != bp->b_wcred)
2754 vfs_busy_pages(bp, 1);
2758 * bp is protected by being locked, but nbp is not
2759 * and vfs_busy_pages() may sleep. We have to
2762 nbp = TAILQ_NEXT(bp, b_bobufs);
2765 * A list of these buffers is kept so that the
2766 * second loop knows which buffers have actually
2767 * been committed. This is necessary, since there
2768 * may be a race between the commit rpc and new
2769 * uncommitted writes on the file.
2771 bvec[bvecpos++] = bp;
2772 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2776 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2784 * Commit data on the server, as required.
2785 * If all bufs are using the same wcred, then use that with
2786 * one call for all of them, otherwise commit each one
2789 if (wcred != NOCRED)
2790 retv = ncl_commit(vp, off, (int)(endoff - off),
2794 for (i = 0; i < bvecpos; i++) {
2797 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2799 size = (u_quad_t)(bp->b_dirtyend
2801 retv = ncl_commit(vp, off, (int)size,
2807 if (retv == NFSERR_STALEWRITEVERF)
2808 ncl_clearcommit(vp->v_mount);
2811 * Now, either mark the blocks I/O done or mark the
2812 * blocks dirty, depending on whether the commit
2815 for (i = 0; i < bvecpos; i++) {
2817 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
2820 * Error, leave B_DELWRI intact
2822 vfs_unbusy_pages(bp);
2826 * Success, remove B_DELWRI ( bundirty() ).
2828 * b_dirtyoff/b_dirtyend seem to be NFS
2829 * specific. We should probably move that
2830 * into bundirty(). XXX
2833 bp->b_flags |= B_ASYNC;
2835 bp->b_flags &= ~B_DONE;
2836 bp->b_ioflags &= ~BIO_ERROR;
2837 bp->b_dirtyoff = bp->b_dirtyend = 0;
2844 * Start/do any write(s) that are required.
2848 TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
2849 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
2850 if (waitfor != MNT_WAIT || passone)
2853 error = BUF_TIMELOCK(bp,
2854 LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK,
2855 BO_MTX(bo), "nfsfsync", slpflag, slptimeo);
2860 if (error == ENOLCK) {
2864 if (called_from_renewthread != 0) {
2866 * Return EIO so the flush will be retried
2872 if (newnfs_sigintr(nmp, td)) {
2876 if (slpflag == PCATCH) {
2882 if ((bp->b_flags & B_DELWRI) == 0)
2883 panic("nfs_fsync: not dirty");
2884 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
2890 if (passone || !commit)
2891 bp->b_flags |= B_ASYNC;
2893 bp->b_flags |= B_ASYNC;
2895 if (newnfs_sigintr(nmp, td)) {
2906 if (waitfor == MNT_WAIT) {
2907 while (bo->bo_numoutput) {
2908 error = bufobj_wwait(bo, slpflag, slptimeo);
2911 if (called_from_renewthread != 0) {
2913 * Return EIO so that the flush will be
2919 error = newnfs_sigintr(nmp, td);
2922 if (slpflag == PCATCH) {
2929 if (bo->bo_dirty.bv_cnt != 0 && commit) {
2934 * Wait for all the async IO requests to drain
2937 mtx_lock(&np->n_mtx);
2938 while (np->n_directio_asyncwr > 0) {
2939 np->n_flag |= NFSYNCWAIT;
2940 error = newnfs_msleep(td, &np->n_directio_asyncwr,
2941 &np->n_mtx, slpflag | (PRIBIO + 1),
2944 if (newnfs_sigintr(nmp, td)) {
2945 mtx_unlock(&np->n_mtx);
2951 mtx_unlock(&np->n_mtx);
2954 if (NFSHASPNFS(nmp))
2955 nfscl_layoutcommit(vp, td);
2956 mtx_lock(&np->n_mtx);
2957 if (np->n_flag & NWRITEERR) {
2958 error = np->n_error;
2959 np->n_flag &= ~NWRITEERR;
2961 if (commit && bo->bo_dirty.bv_cnt == 0 &&
2962 bo->bo_numoutput == 0 && np->n_directio_asyncwr == 0)
2963 np->n_flag &= ~NMODIFIED;
2964 mtx_unlock(&np->n_mtx);
2966 if (bvec != NULL && bvec != bvec_on_stack)
2968 if (error == 0 && commit != 0 && waitfor == MNT_WAIT &&
2969 (bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0 ||
2970 np->n_directio_asyncwr != 0) && trycnt++ < 5) {
2971 /* try, try again... */
2976 printf("try%d\n", trycnt);
2983 * NFS advisory byte-level locks.
2986 nfs_advlock(struct vop_advlock_args *ap)
2988 struct vnode *vp = ap->a_vp;
2990 struct nfsnode *np = VTONFS(ap->a_vp);
2991 struct proc *p = (struct proc *)ap->a_id;
2992 struct thread *td = curthread; /* XXX */
2994 int ret, error = EOPNOTSUPP;
2997 if (NFS_ISV4(vp) && (ap->a_flags & (F_POSIX | F_FLOCK)) != 0) {
2998 if (vp->v_type != VREG)
3000 if ((ap->a_flags & F_POSIX) != 0)
3003 cred = td->td_ucred;
3004 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
3005 if (vp->v_iflag & VI_DOOMED) {
3006 NFSVOPUNLOCK(vp, 0);
3011 * If this is unlocking a write locked region, flush and
3012 * commit them before unlocking. This is required by
3013 * RFC3530 Sec. 9.3.2.
3015 if (ap->a_op == F_UNLCK &&
3016 nfscl_checkwritelocked(vp, ap->a_fl, cred, td, ap->a_id,
3018 (void) ncl_flush(vp, MNT_WAIT, cred, td, 1, 0);
3021 * Loop around doing the lock op, while a blocking lock
3022 * must wait for the lock op to succeed.
3025 ret = nfsrpc_advlock(vp, np->n_size, ap->a_op,
3026 ap->a_fl, 0, cred, td, ap->a_id, ap->a_flags);
3027 if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
3028 ap->a_op == F_SETLK) {
3029 NFSVOPUNLOCK(vp, 0);
3030 error = nfs_catnap(PZERO | PCATCH, ret,
3034 NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
3035 if (vp->v_iflag & VI_DOOMED) {
3036 NFSVOPUNLOCK(vp, 0);
3040 } while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
3041 ap->a_op == F_SETLK);
3042 if (ret == NFSERR_DENIED) {
3043 NFSVOPUNLOCK(vp, 0);
3045 } else if (ret == EINVAL || ret == EBADF || ret == EINTR) {
3046 NFSVOPUNLOCK(vp, 0);
3048 } else if (ret != 0) {
3049 NFSVOPUNLOCK(vp, 0);
3054 * Now, if we just got a lock, invalidate data in the buffer
3055 * cache, as required, so that the coherency conforms with
3056 * RFC3530 Sec. 9.3.2.
3058 if (ap->a_op == F_SETLK) {
3059 if ((np->n_flag & NMODIFIED) == 0) {
3060 np->n_attrstamp = 0;
3061 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
3062 ret = VOP_GETATTR(vp, &va, cred);
3064 if ((np->n_flag & NMODIFIED) || ret ||
3065 np->n_change != va.va_filerev) {
3066 (void) ncl_vinvalbuf(vp, V_SAVE, td, 1);
3067 np->n_attrstamp = 0;
3068 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
3069 ret = VOP_GETATTR(vp, &va, cred);
3071 np->n_mtime = va.va_mtime;
3072 np->n_change = va.va_filerev;
3076 NFSVOPUNLOCK(vp, 0);
3078 } else if (!NFS_ISV4(vp)) {
3079 error = NFSVOPLOCK(vp, LK_SHARED);
3082 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
3083 size = VTONFS(vp)->n_size;
3084 NFSVOPUNLOCK(vp, 0);
3085 error = lf_advlock(ap, &(vp->v_lockf), size);
3087 if (nfs_advlock_p != NULL)
3088 error = nfs_advlock_p(ap);
3090 NFSVOPUNLOCK(vp, 0);
3099 * NFS advisory byte-level locks.
3102 nfs_advlockasync(struct vop_advlockasync_args *ap)
3104 struct vnode *vp = ap->a_vp;
3109 return (EOPNOTSUPP);
3110 error = NFSVOPLOCK(vp, LK_SHARED);
3113 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
3114 size = VTONFS(vp)->n_size;
3115 NFSVOPUNLOCK(vp, 0);
3116 error = lf_advlockasync(ap, &(vp->v_lockf), size);
3118 NFSVOPUNLOCK(vp, 0);
3125 * Print out the contents of an nfsnode.
3128 nfs_print(struct vop_print_args *ap)
3130 struct vnode *vp = ap->a_vp;
3131 struct nfsnode *np = VTONFS(vp);
3133 ncl_printf("\tfileid %ld fsid 0x%x",
3134 np->n_vattr.na_fileid, np->n_vattr.na_fsid);
3135 if (vp->v_type == VFIFO)
3142 * This is the "real" nfs::bwrite(struct buf*).
3143 * We set B_CACHE if this is a VMIO buffer.
3146 ncl_writebp(struct buf *bp, int force __unused, struct thread *td)
3149 int oldflags = bp->b_flags;
3155 BUF_ASSERT_HELD(bp);
3157 if (bp->b_flags & B_INVAL) {
3162 bp->b_flags |= B_CACHE;
3165 * Undirty the bp. We will redirty it later if the I/O fails.
3170 bp->b_flags &= ~B_DONE;
3171 bp->b_ioflags &= ~BIO_ERROR;
3172 bp->b_iocmd = BIO_WRITE;
3174 bufobj_wref(bp->b_bufobj);
3175 curthread->td_ru.ru_oublock++;
3179 * Note: to avoid loopback deadlocks, we do not
3180 * assign b_runningbufspace.
3182 vfs_busy_pages(bp, 1);
3185 bp->b_iooffset = dbtob(bp->b_blkno);
3188 if( (oldflags & B_ASYNC) == 0) {
3189 int rtval = bufwait(bp);
3191 if (oldflags & B_DELWRI) {
3204 * nfs special file access vnode op.
3205 * Essentially just get vattr and then imitate iaccess() since the device is
3206 * local to the client.
3209 nfsspec_access(struct vop_access_args *ap)
3212 struct ucred *cred = ap->a_cred;
3213 struct vnode *vp = ap->a_vp;
3214 accmode_t accmode = ap->a_accmode;
3219 * Disallow write attempts on filesystems mounted read-only;
3220 * unless the file is a socket, fifo, or a block or character
3221 * device resident on the filesystem.
3223 if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3224 switch (vp->v_type) {
3234 error = VOP_GETATTR(vp, vap, cred);
3237 error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid,
3238 accmode, cred, NULL);
3244 * Read wrapper for fifos.
3247 nfsfifo_read(struct vop_read_args *ap)
3249 struct nfsnode *np = VTONFS(ap->a_vp);
3255 mtx_lock(&np->n_mtx);
3257 vfs_timestamp(&np->n_atim);
3258 mtx_unlock(&np->n_mtx);
3259 error = fifo_specops.vop_read(ap);
3264 * Write wrapper for fifos.
3267 nfsfifo_write(struct vop_write_args *ap)
3269 struct nfsnode *np = VTONFS(ap->a_vp);
3274 mtx_lock(&np->n_mtx);
3276 vfs_timestamp(&np->n_mtim);
3277 mtx_unlock(&np->n_mtx);
3278 return(fifo_specops.vop_write(ap));
3282 * Close wrapper for fifos.
3284 * Update the times on the nfsnode then do fifo close.
3287 nfsfifo_close(struct vop_close_args *ap)
3289 struct vnode *vp = ap->a_vp;
3290 struct nfsnode *np = VTONFS(vp);
3294 mtx_lock(&np->n_mtx);
3295 if (np->n_flag & (NACC | NUPD)) {
3297 if (np->n_flag & NACC)
3299 if (np->n_flag & NUPD)
3302 if (vrefcnt(vp) == 1 &&
3303 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3305 if (np->n_flag & NACC)
3306 vattr.va_atime = np->n_atim;
3307 if (np->n_flag & NUPD)
3308 vattr.va_mtime = np->n_mtim;
3309 mtx_unlock(&np->n_mtx);
3310 (void)VOP_SETATTR(vp, &vattr, ap->a_cred);
3314 mtx_unlock(&np->n_mtx);
3316 return (fifo_specops.vop_close(ap));
3320 * Just call ncl_writebp() with the force argument set to 1.
3322 * NOTE: B_DONE may or may not be set in a_bp on call.
3325 nfs_bwrite(struct buf *bp)
3328 return (ncl_writebp(bp, 1, curthread));
3331 struct buf_ops buf_ops_newnfs = {
3332 .bop_name = "buf_ops_nfs",
3333 .bop_write = nfs_bwrite,
3334 .bop_strategy = bufstrategy,
3335 .bop_sync = bufsync,
3336 .bop_bdflush = bufbdflush,
3340 * Cloned from vop_stdlock(), and then the ugly hack added.
3343 nfs_lock1(struct vop_lock1_args *ap)
3345 struct vnode *vp = ap->a_vp;
3349 * Since vfs_hash_get() calls vget() and it will no longer work
3350 * for FreeBSD8 with flags == 0, I can only think of this horrible
3351 * hack to work around it. I call vfs_hash_get() with LK_EXCLOTHER
3352 * and then handle it here. All I want for this case is a v_usecount
3353 * on the vnode to use for recovery, while another thread might
3354 * hold a lock on the vnode. I have the other threads blocked, so
3355 * there isn't any race problem.
3357 if ((ap->a_flags & LK_TYPE_MASK) == LK_EXCLOTHER) {
3358 if ((ap->a_flags & LK_INTERLOCK) == 0)
3360 if ((vp->v_iflag & VI_DOOMED))
3365 return (_lockmgr_args(vp->v_vnlock, ap->a_flags, VI_MTX(vp),
3366 LK_WMESG_DEFAULT, LK_PRIO_DEFAULT, LK_TIMO_DEFAULT, ap->a_file,
3371 nfs_getacl(struct vop_getacl_args *ap)
3375 if (ap->a_type != ACL_TYPE_NFS4)
3376 return (EOPNOTSUPP);
3377 error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3379 if (error > NFSERR_STALE) {
3380 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3387 nfs_setacl(struct vop_setacl_args *ap)
3391 if (ap->a_type != ACL_TYPE_NFS4)
3392 return (EOPNOTSUPP);
3393 error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp,
3395 if (error > NFSERR_STALE) {
3396 (void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
3403 * Return POSIX pathconf information applicable to nfs filesystems.
3406 nfs_pathconf(struct vop_pathconf_args *ap)
3408 struct nfsv3_pathconf pc;
3409 struct nfsvattr nfsva;
3410 struct vnode *vp = ap->a_vp;
3411 struct thread *td = curthread;
3412 int attrflag, error;
3414 if (NFS_ISV4(vp) || (NFS_ISV3(vp) && (ap->a_name == _PC_LINK_MAX ||
3415 ap->a_name == _PC_NAME_MAX || ap->a_name == _PC_CHOWN_RESTRICTED ||
3416 ap->a_name == _PC_NO_TRUNC))) {
3418 * Since only the above 4 a_names are returned by the NFSv3
3419 * Pathconf RPC, there is no point in doing it for others.
3421 error = nfsrpc_pathconf(vp, &pc, td->td_ucred, td, &nfsva,
3424 (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0,
3430 * For NFSv2 (or NFSv3 when not one of the above 4 a_names),
3433 pc.pc_linkmax = LINK_MAX;
3434 pc.pc_namemax = NFS_MAXNAMLEN;
3436 pc.pc_chownrestricted = 1;
3437 pc.pc_caseinsensitive = 0;
3438 pc.pc_casepreserving = 1;
3441 switch (ap->a_name) {
3443 *ap->a_retval = pc.pc_linkmax;
3446 *ap->a_retval = pc.pc_namemax;
3449 *ap->a_retval = PATH_MAX;
3452 *ap->a_retval = PIPE_BUF;
3454 case _PC_CHOWN_RESTRICTED:
3455 *ap->a_retval = pc.pc_chownrestricted;
3458 *ap->a_retval = pc.pc_notrunc;
3460 case _PC_ACL_EXTENDED:
3464 if (NFS_ISV4(vp) && nfsrv_useacl != 0 && attrflag != 0 &&
3465 NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL))
3470 case _PC_ACL_PATH_MAX:
3472 *ap->a_retval = ACL_MAX_ENTRIES;
3476 case _PC_MAC_PRESENT:
3480 /* _PC_ASYNC_IO should have been handled by upper layers. */
3481 KASSERT(0, ("_PC_ASYNC_IO should not get here"));
3490 case _PC_ALLOC_SIZE_MIN:
3491 *ap->a_retval = vp->v_mount->mnt_stat.f_bsize;
3493 case _PC_FILESIZEBITS:
3499 case _PC_REC_INCR_XFER_SIZE:
3500 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
3502 case _PC_REC_MAX_XFER_SIZE:
3503 *ap->a_retval = -1; /* means ``unlimited'' */
3505 case _PC_REC_MIN_XFER_SIZE:
3506 *ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
3508 case _PC_REC_XFER_ALIGN:
3509 *ap->a_retval = PAGE_SIZE;
3511 case _PC_SYMLINK_MAX:
3512 *ap->a_retval = NFS_MAXPATHLEN;