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 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95
37 * $FreeBSD: src/sys/nfs/nfs_vnops.c,v 1.150.2.5 2001/12/20 19:56:28 dillon Exp $
38 * $DragonFly: src/sys/vfs/nfs/nfs_vnops.c,v 1.66 2006/09/05 00:55:50 dillon Exp $
43 * vnode op calls for Sun NFS version 2 and 3
48 #include <sys/param.h>
49 #include <sys/kernel.h>
50 #include <sys/systm.h>
51 #include <sys/resourcevar.h>
53 #include <sys/mount.h>
55 #include <sys/malloc.h>
57 #include <sys/namei.h>
58 #include <sys/nlookup.h>
59 #include <sys/socket.h>
60 #include <sys/vnode.h>
61 #include <sys/dirent.h>
62 #include <sys/fcntl.h>
63 #include <sys/lockf.h>
65 #include <sys/sysctl.h>
69 #include <vm/vm_extern.h>
70 #include <vm/vm_zone.h>
74 #include <vfs/fifofs/fifo.h>
75 #include <vfs/ufs/dir.h>
85 #include "nfsm_subs.h"
88 #include <netinet/in.h>
89 #include <netinet/in_var.h>
91 #include <sys/thread2.h>
97 static int nfsspec_read (struct vop_read_args *);
98 static int nfsspec_write (struct vop_write_args *);
99 static int nfsfifo_read (struct vop_read_args *);
100 static int nfsfifo_write (struct vop_write_args *);
101 static int nfsspec_close (struct vop_close_args *);
102 static int nfsfifo_close (struct vop_close_args *);
103 #define nfs_poll vop_nopoll
104 static int nfs_setattrrpc (struct vnode *,struct vattr *,struct ucred *,struct thread *);
105 static int nfs_lookup (struct vop_old_lookup_args *);
106 static int nfs_create (struct vop_old_create_args *);
107 static int nfs_mknod (struct vop_old_mknod_args *);
108 static int nfs_open (struct vop_open_args *);
109 static int nfs_close (struct vop_close_args *);
110 static int nfs_access (struct vop_access_args *);
111 static int nfs_getattr (struct vop_getattr_args *);
112 static int nfs_setattr (struct vop_setattr_args *);
113 static int nfs_read (struct vop_read_args *);
114 static int nfs_mmap (struct vop_mmap_args *);
115 static int nfs_fsync (struct vop_fsync_args *);
116 static int nfs_remove (struct vop_old_remove_args *);
117 static int nfs_link (struct vop_old_link_args *);
118 static int nfs_rename (struct vop_old_rename_args *);
119 static int nfs_mkdir (struct vop_old_mkdir_args *);
120 static int nfs_rmdir (struct vop_old_rmdir_args *);
121 static int nfs_symlink (struct vop_old_symlink_args *);
122 static int nfs_readdir (struct vop_readdir_args *);
123 static int nfs_bmap (struct vop_bmap_args *);
124 static int nfs_strategy (struct vop_strategy_args *);
125 static int nfs_lookitup (struct vnode *, const char *, int,
126 struct ucred *, struct thread *, struct nfsnode **);
127 static int nfs_sillyrename (struct vnode *,struct vnode *,struct componentname *);
128 static int nfsspec_access (struct vop_access_args *);
129 static int nfs_readlink (struct vop_readlink_args *);
130 static int nfs_print (struct vop_print_args *);
131 static int nfs_advlock (struct vop_advlock_args *);
133 static int nfs_nresolve (struct vop_nresolve_args *);
135 * Global vfs data structures for nfs
137 struct vop_ops nfsv2_vnode_vops = {
138 .vop_default = vop_defaultop,
139 .vop_access = nfs_access,
140 .vop_advlock = nfs_advlock,
141 .vop_bmap = nfs_bmap,
142 .vop_close = nfs_close,
143 .vop_old_create = nfs_create,
144 .vop_fsync = nfs_fsync,
145 .vop_getattr = nfs_getattr,
146 .vop_getpages = nfs_getpages,
147 .vop_putpages = nfs_putpages,
148 .vop_inactive = nfs_inactive,
149 .vop_old_link = nfs_link,
150 .vop_old_lookup = nfs_lookup,
151 .vop_old_mkdir = nfs_mkdir,
152 .vop_old_mknod = nfs_mknod,
153 .vop_mmap = nfs_mmap,
154 .vop_open = nfs_open,
155 .vop_poll = nfs_poll,
156 .vop_print = nfs_print,
157 .vop_read = nfs_read,
158 .vop_readdir = nfs_readdir,
159 .vop_readlink = nfs_readlink,
160 .vop_reclaim = nfs_reclaim,
161 .vop_old_remove = nfs_remove,
162 .vop_old_rename = nfs_rename,
163 .vop_old_rmdir = nfs_rmdir,
164 .vop_setattr = nfs_setattr,
165 .vop_strategy = nfs_strategy,
166 .vop_old_symlink = nfs_symlink,
167 .vop_write = nfs_write,
168 .vop_nresolve = nfs_nresolve
172 * Special device vnode ops
174 struct vop_ops nfsv2_spec_vops = {
175 .vop_default = spec_vnoperate,
176 .vop_access = nfsspec_access,
177 .vop_close = nfsspec_close,
178 .vop_fsync = nfs_fsync,
179 .vop_getattr = nfs_getattr,
180 .vop_inactive = nfs_inactive,
181 .vop_print = nfs_print,
182 .vop_read = nfsspec_read,
183 .vop_reclaim = nfs_reclaim,
184 .vop_setattr = nfs_setattr,
185 .vop_write = nfsspec_write
188 struct vop_ops nfsv2_fifo_vops = {
189 .vop_default = fifo_vnoperate,
190 .vop_access = nfsspec_access,
191 .vop_close = nfsfifo_close,
192 .vop_fsync = nfs_fsync,
193 .vop_getattr = nfs_getattr,
194 .vop_inactive = nfs_inactive,
195 .vop_print = nfs_print,
196 .vop_read = nfsfifo_read,
197 .vop_reclaim = nfs_reclaim,
198 .vop_setattr = nfs_setattr,
199 .vop_write = nfsfifo_write
202 static int nfs_mknodrpc (struct vnode *dvp, struct vnode **vpp,
203 struct componentname *cnp,
205 static int nfs_removerpc (struct vnode *dvp, const char *name,
207 struct ucred *cred, struct thread *td);
208 static int nfs_renamerpc (struct vnode *fdvp, const char *fnameptr,
209 int fnamelen, struct vnode *tdvp,
210 const char *tnameptr, int tnamelen,
211 struct ucred *cred, struct thread *td);
212 static int nfs_renameit (struct vnode *sdvp,
213 struct componentname *scnp,
214 struct sillyrename *sp);
219 extern u_int32_t nfs_true, nfs_false;
220 extern u_int32_t nfs_xdrneg1;
221 extern struct nfsstats nfsstats;
222 extern nfstype nfsv3_type[9];
223 struct thread *nfs_iodwant[NFS_MAXASYNCDAEMON];
224 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON];
225 int nfs_numasync = 0;
227 SYSCTL_DECL(_vfs_nfs);
229 static int nfsaccess_cache_timeout = NFS_DEFATTRTIMO;
230 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
231 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
233 static int nfsneg_cache_timeout = NFS_MINATTRTIMO;
234 SYSCTL_INT(_vfs_nfs, OID_AUTO, neg_cache_timeout, CTLFLAG_RW,
235 &nfsneg_cache_timeout, 0, "NFS NEGATIVE ACCESS cache timeout");
237 static int nfsv3_commit_on_close = 0;
238 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
239 &nfsv3_commit_on_close, 0, "write+commit on close, else only write");
241 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
242 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
244 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
245 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
248 #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \
249 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \
250 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP)
252 nfs3_access_otw(struct vnode *vp, int wmode,
253 struct thread *td, struct ucred *cred)
257 int error = 0, attrflag;
259 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
260 caddr_t bpos, dpos, cp2;
264 struct nfsnode *np = VTONFS(vp);
266 nfsstats.rpccnt[NFSPROC_ACCESS]++;
267 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED);
269 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
270 *tl = txdr_unsigned(wmode);
271 nfsm_request(vp, NFSPROC_ACCESS, td, cred);
272 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
274 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
275 rmode = fxdr_unsigned(u_int32_t, *tl);
277 np->n_modeuid = cred->cr_uid;
278 np->n_modestamp = mycpu->gd_time_seconds;
286 * nfs access vnode op.
287 * For nfs version 2, just return ok. File accesses may fail later.
288 * For nfs version 3, use the access rpc to check accessibility. If file modes
289 * are changed on the server, accesses might still fail later.
291 * nfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
292 * struct thread *a_td)
295 nfs_access(struct vop_access_args *ap)
297 struct vnode *vp = ap->a_vp;
298 thread_t td = curthread;
300 u_int32_t mode, wmode;
301 int v3 = NFS_ISV3(vp);
302 struct nfsnode *np = VTONFS(vp);
305 * Disallow write attempts on filesystems mounted read-only;
306 * unless the file is a socket, fifo, or a block or character
307 * device resident on the filesystem.
309 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
310 switch (vp->v_type) {
320 * For nfs v3, check to see if we have done this recently, and if
321 * so return our cached result instead of making an ACCESS call.
322 * If not, do an access rpc, otherwise you are stuck emulating
323 * ufs_access() locally using the vattr. This may not be correct,
324 * since the server may apply other access criteria such as
325 * client uid-->server uid mapping that we do not know about.
328 if (ap->a_mode & VREAD)
329 mode = NFSV3ACCESS_READ;
332 if (vp->v_type != VDIR) {
333 if (ap->a_mode & VWRITE)
334 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
335 if (ap->a_mode & VEXEC)
336 mode |= NFSV3ACCESS_EXECUTE;
338 if (ap->a_mode & VWRITE)
339 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
341 if (ap->a_mode & VEXEC)
342 mode |= NFSV3ACCESS_LOOKUP;
344 /* XXX safety belt, only make blanket request if caching */
345 if (nfsaccess_cache_timeout > 0) {
346 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY |
347 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE |
348 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP;
354 * Does our cached result allow us to give a definite yes to
357 if (np->n_modestamp &&
358 (mycpu->gd_time_seconds < (np->n_modestamp + nfsaccess_cache_timeout)) &&
359 (ap->a_cred->cr_uid == np->n_modeuid) &&
360 ((np->n_mode & mode) == mode)) {
361 nfsstats.accesscache_hits++;
364 * Either a no, or a don't know. Go to the wire.
366 nfsstats.accesscache_misses++;
367 error = nfs3_access_otw(vp, wmode, td, ap->a_cred);
369 if ((np->n_mode & mode) != mode) {
375 if ((error = nfsspec_access(ap)) != 0)
379 * Attempt to prevent a mapped root from accessing a file
380 * which it shouldn't. We try to read a byte from the file
381 * if the user is root and the file is not zero length.
382 * After calling nfsspec_access, we should have the correct
385 if (ap->a_cred->cr_uid == 0 && (ap->a_mode & VREAD)
386 && VTONFS(vp)->n_size > 0) {
393 auio.uio_iov = &aiov;
397 auio.uio_segflg = UIO_SYSSPACE;
398 auio.uio_rw = UIO_READ;
401 if (vp->v_type == VREG) {
402 error = nfs_readrpc(vp, &auio);
403 } else if (vp->v_type == VDIR) {
405 bp = kmalloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
407 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
408 error = nfs_readdirrpc(vp, &auio);
410 } else if (vp->v_type == VLNK) {
411 error = nfs_readlinkrpc(vp, &auio);
418 * [re]record creds for reading and/or writing if access
419 * was granted. Assume the NFS server will grant read access
420 * for execute requests.
423 if ((ap->a_mode & (VREAD|VEXEC)) && ap->a_cred != np->n_rucred) {
426 crfree(np->n_rucred);
427 np->n_rucred = ap->a_cred;
429 if ((ap->a_mode & VWRITE) && ap->a_cred != np->n_wucred) {
432 crfree(np->n_wucred);
433 np->n_wucred = ap->a_cred;
441 * Check to see if the type is ok
442 * and that deletion is not in progress.
443 * For paged in text files, you will need to flush the page cache
444 * if consistency is lost.
446 * nfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
450 nfs_open(struct vop_open_args *ap)
452 struct vnode *vp = ap->a_vp;
453 struct nfsnode *np = VTONFS(vp);
457 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
459 printf("open eacces vtyp=%d\n",vp->v_type);
465 * Clear the attribute cache only if opening with write access. It
466 * is unclear if we should do this at all here, but we certainly
467 * should not clear the cache unconditionally simply because a file
470 if (ap->a_mode & FWRITE)
474 * For normal NFS, reconcile changes made locally verses
475 * changes made remotely. Note that VOP_GETATTR only goes
476 * to the wire if the cached attribute has timed out or been
479 * If local modifications have been made clear the attribute
480 * cache to force an attribute and modified time check. If
481 * GETATTR detects that the file has been changed by someone
482 * other then us it will set NRMODIFIED.
484 * If we are opening a directory and local changes have been
485 * made we have to invalidate the cache in order to ensure
486 * that we get the most up-to-date information from the
489 if (np->n_flag & NLMODIFIED) {
491 if (vp->v_type == VDIR) {
492 error = nfs_vinvalbuf(vp, V_SAVE, 1);
498 error = VOP_GETATTR(vp, &vattr);
501 if (np->n_flag & NRMODIFIED) {
502 if (vp->v_type == VDIR)
504 error = nfs_vinvalbuf(vp, V_SAVE, 1);
507 np->n_flag &= ~NRMODIFIED;
510 return (vop_stdopen(ap));
515 * What an NFS client should do upon close after writing is a debatable issue.
516 * Most NFS clients push delayed writes to the server upon close, basically for
518 * 1 - So that any write errors may be reported back to the client process
519 * doing the close system call. By far the two most likely errors are
520 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
521 * 2 - To put a worst case upper bound on cache inconsistency between
522 * multiple clients for the file.
523 * There is also a consistency problem for Version 2 of the protocol w.r.t.
524 * not being able to tell if other clients are writing a file concurrently,
525 * since there is no way of knowing if the changed modify time in the reply
526 * is only due to the write for this client.
527 * (NFS Version 3 provides weak cache consistency data in the reply that
528 * should be sufficient to detect and handle this case.)
530 * The current code does the following:
531 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
532 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
533 * or commit them (this satisfies 1 and 2 except for the
534 * case where the server crashes after this close but
535 * before the commit RPC, which is felt to be "good
536 * enough". Changing the last argument to nfs_flush() to
537 * a 1 would force a commit operation, if it is felt a
538 * commit is necessary now.
539 * for NQNFS - do nothing now, since 2 is dealt with via leases and
540 * 1 should be dealt with via an fsync() system call for
541 * cases where write errors are important.
543 * nfs_close(struct vnode *a_vp, int a_fflag,
544 * struct ucred *a_cred, struct thread *a_td)
548 nfs_close(struct vop_close_args *ap)
550 struct vnode *vp = ap->a_vp;
551 struct nfsnode *np = VTONFS(vp);
553 thread_t td = curthread;
555 if (vp->v_type == VREG) {
556 if (np->n_flag & NLMODIFIED) {
559 * Under NFSv3 we have dirty buffers to dispose of. We
560 * must flush them to the NFS server. We have the option
561 * of waiting all the way through the commit rpc or just
562 * waiting for the initial write. The default is to only
563 * wait through the initial write so the data is in the
564 * server's cache, which is roughly similar to the state
565 * a standard disk subsystem leaves the file in on close().
567 * We cannot clear the NLMODIFIED bit in np->n_flag due to
568 * potential races with other processes, and certainly
569 * cannot clear it if we don't commit.
571 int cm = nfsv3_commit_on_close ? 1 : 0;
572 error = nfs_flush(vp, MNT_WAIT, td, cm);
573 /* np->n_flag &= ~NLMODIFIED; */
575 error = nfs_vinvalbuf(vp, V_SAVE, 1);
579 if (np->n_flag & NWRITEERR) {
580 np->n_flag &= ~NWRITEERR;
589 * nfs getattr call from vfs.
591 * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred,
592 * struct thread *a_td)
595 nfs_getattr(struct vop_getattr_args *ap)
597 struct vnode *vp = ap->a_vp;
598 struct nfsnode *np = VTONFS(vp);
604 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
605 int v3 = NFS_ISV3(vp);
606 thread_t td = curthread;
609 * Update local times for special files.
611 if (np->n_flag & (NACC | NUPD))
614 * First look in the cache.
616 if (nfs_getattrcache(vp, ap->a_vap) == 0)
619 if (v3 && nfsaccess_cache_timeout > 0) {
620 nfsstats.accesscache_misses++;
621 nfs3_access_otw(vp, NFSV3ACCESS_ALL, td, nfs_vpcred(vp, ND_CHECK));
622 if (nfs_getattrcache(vp, ap->a_vap) == 0)
626 nfsstats.rpccnt[NFSPROC_GETATTR]++;
627 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3));
629 nfsm_request(vp, NFSPROC_GETATTR, td, nfs_vpcred(vp, ND_CHECK));
631 nfsm_loadattr(vp, ap->a_vap);
641 * nfs_setattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred)
644 nfs_setattr(struct vop_setattr_args *ap)
646 struct vnode *vp = ap->a_vp;
647 struct nfsnode *np = VTONFS(vp);
648 struct vattr *vap = ap->a_vap;
651 thread_t td = curthread;
658 * Setting of flags is not supported.
660 if (vap->va_flags != VNOVAL)
664 * Disallow write attempts if the filesystem is mounted read-only.
666 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
667 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
668 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
669 (vp->v_mount->mnt_flag & MNT_RDONLY))
671 if (vap->va_size != VNOVAL) {
672 switch (vp->v_type) {
679 if (vap->va_mtime.tv_sec == VNOVAL &&
680 vap->va_atime.tv_sec == VNOVAL &&
681 vap->va_mode == (mode_t)VNOVAL &&
682 vap->va_uid == (uid_t)VNOVAL &&
683 vap->va_gid == (gid_t)VNOVAL)
685 vap->va_size = VNOVAL;
689 * Disallow write attempts if the filesystem is
692 if (vp->v_mount->mnt_flag & MNT_RDONLY)
696 * This is nasty. The RPCs we send to flush pending
697 * data often return attribute information which is
698 * cached via a callback to nfs_loadattrcache(), which
699 * has the effect of changing our notion of the file
700 * size. Due to flushed appends and other operations
701 * the file size can be set to virtually anything,
702 * including values that do not match either the old
703 * or intended file size.
705 * When this condition is detected we must loop to
706 * try the operation again. Hopefully no more
707 * flushing is required on the loop so it works the
708 * second time around. THIS CASE ALMOST ALWAYS
713 error = nfs_meta_setsize(vp, td, vap->va_size);
715 if (np->n_flag & NLMODIFIED) {
716 if (vap->va_size == 0)
717 error = nfs_vinvalbuf(vp, 0, 1);
719 error = nfs_vinvalbuf(vp, V_SAVE, 1);
722 * note: this loop case almost always happens at
723 * least once per truncation.
725 if (error == 0 && np->n_size != vap->va_size)
727 np->n_vattr.va_size = vap->va_size;
730 } else if ((vap->va_mtime.tv_sec != VNOVAL ||
731 vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NLMODIFIED) &&
732 vp->v_type == VREG &&
733 (error = nfs_vinvalbuf(vp, V_SAVE, 1)) == EINTR
737 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
740 * Sanity check if a truncation was issued. This should only occur
741 * if multiple processes are racing on the same file.
743 if (error == 0 && vap->va_size != VNOVAL &&
744 np->n_size != vap->va_size) {
745 printf("NFS ftruncate: server disagrees on the file size: %lld/%lld/%lld\n", tsize, vap->va_size, np->n_size);
748 if (error && vap->va_size != VNOVAL) {
749 np->n_size = np->n_vattr.va_size = tsize;
750 vnode_pager_setsize(vp, np->n_size);
756 * Do an nfs setattr rpc.
759 nfs_setattrrpc(struct vnode *vp, struct vattr *vap,
760 struct ucred *cred, struct thread *td)
762 struct nfsv2_sattr *sp;
763 struct nfsnode *np = VTONFS(vp);
766 caddr_t bpos, dpos, cp2;
768 int error = 0, wccflag = NFSV3_WCCRATTR;
769 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
770 int v3 = NFS_ISV3(vp);
772 nfsstats.rpccnt[NFSPROC_SETATTR]++;
773 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3));
776 nfsm_v3attrbuild(vap, TRUE);
777 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
780 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
781 if (vap->va_mode == (mode_t)VNOVAL)
782 sp->sa_mode = nfs_xdrneg1;
784 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
785 if (vap->va_uid == (uid_t)VNOVAL)
786 sp->sa_uid = nfs_xdrneg1;
788 sp->sa_uid = txdr_unsigned(vap->va_uid);
789 if (vap->va_gid == (gid_t)VNOVAL)
790 sp->sa_gid = nfs_xdrneg1;
792 sp->sa_gid = txdr_unsigned(vap->va_gid);
793 sp->sa_size = txdr_unsigned(vap->va_size);
794 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
795 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
797 nfsm_request(vp, NFSPROC_SETATTR, td, cred);
800 nfsm_wcc_data(vp, wccflag);
802 nfsm_loadattr(vp, (struct vattr *)0);
809 * NEW API CALL - replaces nfs_lookup(). However, we cannot remove
810 * nfs_lookup() until all remaining new api calls are implemented.
812 * Resolve a namecache entry. This function is passed a locked ncp and
813 * must call cache_setvp() on it as appropriate to resolve the entry.
816 nfs_nresolve(struct vop_nresolve_args *ap)
818 struct thread *td = curthread;
819 struct namecache *ncp;
830 /******NFSM MACROS********/
831 struct mbuf *mb, *mrep, *mreq, *mb2, *md;
832 caddr_t bpos, dpos, cp, cp2;
839 KKASSERT(ncp->nc_parent && ncp->nc_parent->nc_vp);
840 dvp = ncp->nc_parent->nc_vp;
841 if ((error = vget(dvp, LK_SHARED)) != 0)
846 nfsstats.lookupcache_misses++;
847 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
849 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
850 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
852 nfsm_strtom(ncp->nc_name, len, NFS_MAXNAMLEN);
853 nfsm_request(dvp, NFSPROC_LOOKUP, td, ap->a_cred);
856 * Cache negatve lookups to reduce NFS traffic, but use
857 * a fast timeout. Otherwise use a timeout of 1 tick.
858 * XXX we should add a namecache flag for no-caching
859 * to uncache the negative hit as soon as possible, but
860 * we cannot simply destroy the entry because it is used
861 * as a placeholder by the caller.
863 if (error == ENOENT) {
866 if (nfsneg_cache_timeout)
867 nticks = nfsneg_cache_timeout * hz;
870 cache_setvp(ncp, NULL);
871 cache_settimeout(ncp, nticks);
873 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
879 * Success, get the file handle, do various checks, and load
880 * post-operation data from the reply packet. Theoretically
881 * we should never be looking up "." so, theoretically, we
882 * should never get the same file handle as our directory. But
883 * we check anyway. XXX
885 * Note that no timeout is set for the positive cache hit. We
886 * assume, theoretically, that ESTALE returns will be dealt with
887 * properly to handle NFS races and in anycase we cannot depend
888 * on a timeout to deal with NFS open/create/excl issues so instead
889 * of a bad hack here the rest of the NFS client code needs to do
892 nfsm_getfh(fhp, fhsize, v3);
895 if (NFS_CMPFH(np, fhp, fhsize)) {
899 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
908 nfsm_postop_attr(nvp, attrflag, NFS_LATTR_NOSHRINK);
909 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
911 nfsm_loadattr(nvp, NULL);
913 cache_setvp(ncp, nvp);
927 * 'cached' nfs directory lookup
929 * NOTE: cannot be removed until NFS implements all the new n*() API calls.
931 * nfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
932 * struct componentname *a_cnp)
935 nfs_lookup(struct vop_old_lookup_args *ap)
937 struct componentname *cnp = ap->a_cnp;
938 struct vnode *dvp = ap->a_dvp;
939 struct vnode **vpp = ap->a_vpp;
940 int flags = cnp->cn_flags;
945 struct nfsmount *nmp;
946 caddr_t bpos, dpos, cp2;
947 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
951 int lockparent, wantparent, error = 0, attrflag, fhsize;
952 int v3 = NFS_ISV3(dvp);
955 * Read-only mount check and directory check.
958 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) &&
959 (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME))
962 if (dvp->v_type != VDIR)
966 * Look it up in the cache. Note that ENOENT is only returned if we
967 * previously entered a negative hit (see later on). The additional
968 * nfsneg_cache_timeout check causes previously cached results to
969 * be instantly ignored if the negative caching is turned off.
971 lockparent = flags & CNP_LOCKPARENT;
972 wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT);
973 nmp = VFSTONFS(dvp->v_mount);
981 nfsstats.lookupcache_misses++;
982 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
983 len = cnp->cn_namelen;
984 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
985 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
987 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
988 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_td, cnp->cn_cred);
990 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
994 nfsm_getfh(fhp, fhsize, v3);
997 * Handle RENAME case...
999 if (cnp->cn_nameiop == NAMEI_RENAME && wantparent) {
1000 if (NFS_CMPFH(np, fhp, fhsize)) {
1004 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1011 nfsm_postop_attr(newvp, attrflag, NFS_LATTR_NOSHRINK);
1012 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
1014 nfsm_loadattr(newvp, (struct vattr *)0);
1019 cnp->cn_flags |= CNP_PDIRUNLOCK;
1024 if (flags & CNP_ISDOTDOT) {
1026 cnp->cn_flags |= CNP_PDIRUNLOCK;
1027 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1029 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
1030 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
1031 return (error); /* NOTE: return error from nget */
1035 error = vn_lock(dvp, LK_EXCLUSIVE);
1040 cnp->cn_flags |= CNP_PDIRUNLOCK;
1042 } else if (NFS_CMPFH(np, fhp, fhsize)) {
1046 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1053 cnp->cn_flags |= CNP_PDIRUNLOCK;
1058 nfsm_postop_attr(newvp, attrflag, NFS_LATTR_NOSHRINK);
1059 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
1061 nfsm_loadattr(newvp, (struct vattr *)0);
1063 /* XXX MOVE TO nfs_nremove() */
1064 if ((cnp->cn_flags & CNP_MAKEENTRY) &&
1065 cnp->cn_nameiop != NAMEI_DELETE) {
1066 np->n_ctime = np->n_vattr.va_ctime.tv_sec; /* XXX */
1073 if (newvp != NULLVP) {
1077 if ((cnp->cn_nameiop == NAMEI_CREATE ||
1078 cnp->cn_nameiop == NAMEI_RENAME) &&
1082 cnp->cn_flags |= CNP_PDIRUNLOCK;
1084 if (dvp->v_mount->mnt_flag & MNT_RDONLY)
1087 error = EJUSTRETURN;
1095 * Just call nfs_bioread() to do the work.
1097 * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1098 * struct ucred *a_cred)
1101 nfs_read(struct vop_read_args *ap)
1103 struct vnode *vp = ap->a_vp;
1105 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
1106 switch (vp->v_type) {
1108 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
1119 * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
1122 nfs_readlink(struct vop_readlink_args *ap)
1124 struct vnode *vp = ap->a_vp;
1126 if (vp->v_type != VLNK)
1128 return (nfs_bioread(vp, ap->a_uio, 0));
1132 * Do a readlink rpc.
1133 * Called by nfs_doio() from below the buffer cache.
1136 nfs_readlinkrpc(struct vnode *vp, struct uio *uiop)
1141 caddr_t bpos, dpos, cp2;
1142 int error = 0, len, attrflag;
1143 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1144 int v3 = NFS_ISV3(vp);
1146 nfsstats.rpccnt[NFSPROC_READLINK]++;
1147 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3));
1149 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_td, nfs_vpcred(vp, ND_CHECK));
1151 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
1153 nfsm_strsiz(len, NFS_MAXPATHLEN);
1154 if (len == NFS_MAXPATHLEN) {
1155 struct nfsnode *np = VTONFS(vp);
1156 if (np->n_size && np->n_size < NFS_MAXPATHLEN)
1159 nfsm_mtouio(uiop, len);
1171 nfs_readrpc(struct vnode *vp, struct uio *uiop)
1176 caddr_t bpos, dpos, cp2;
1177 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1178 struct nfsmount *nmp;
1179 int error = 0, len, retlen, tsiz, eof, attrflag;
1180 int v3 = NFS_ISV3(vp);
1185 nmp = VFSTONFS(vp->v_mount);
1186 tsiz = uiop->uio_resid;
1187 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1190 nfsstats.rpccnt[NFSPROC_READ]++;
1191 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
1192 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3);
1194 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3);
1196 txdr_hyper(uiop->uio_offset, tl);
1197 *(tl + 2) = txdr_unsigned(len);
1199 *tl++ = txdr_unsigned(uiop->uio_offset);
1200 *tl++ = txdr_unsigned(len);
1203 nfsm_request(vp, NFSPROC_READ, uiop->uio_td, nfs_vpcred(vp, ND_READ));
1205 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
1210 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1211 eof = fxdr_unsigned(int, *(tl + 1));
1213 nfsm_loadattr(vp, (struct vattr *)0);
1214 nfsm_strsiz(retlen, nmp->nm_rsize);
1215 nfsm_mtouio(uiop, retlen);
1219 if (eof || retlen == 0) {
1222 } else if (retlen < len) {
1234 nfs_writerpc(struct vnode *vp, struct uio *uiop, int *iomode, int *must_commit)
1238 int32_t t1, t2, backup;
1239 caddr_t bpos, dpos, cp2;
1240 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1241 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1242 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
1243 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC;
1246 if (uiop->uio_iovcnt != 1)
1247 panic("nfs: writerpc iovcnt > 1");
1250 tsiz = uiop->uio_resid;
1251 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1254 nfsstats.rpccnt[NFSPROC_WRITE]++;
1255 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1256 nfsm_reqhead(vp, NFSPROC_WRITE,
1257 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len));
1260 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
1261 txdr_hyper(uiop->uio_offset, tl);
1263 *tl++ = txdr_unsigned(len);
1264 *tl++ = txdr_unsigned(*iomode);
1265 *tl = txdr_unsigned(len);
1269 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1270 /* Set both "begin" and "current" to non-garbage. */
1271 x = txdr_unsigned((u_int32_t)uiop->uio_offset);
1272 *tl++ = x; /* "begin offset" */
1273 *tl++ = x; /* "current offset" */
1274 x = txdr_unsigned(len);
1275 *tl++ = x; /* total to this offset */
1276 *tl = x; /* size of this write */
1278 nfsm_uiotom(uiop, len);
1279 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_td, nfs_vpcred(vp, ND_WRITE));
1282 * The write RPC returns a before and after mtime. The
1283 * nfsm_wcc_data() macro checks the before n_mtime
1284 * against the before time and stores the after time
1285 * in the nfsnode's cached vattr and n_mtime field.
1286 * The NRMODIFIED bit will be set if the before
1287 * time did not match the original mtime.
1289 wccflag = NFSV3_WCCCHK;
1290 nfsm_wcc_data(vp, wccflag);
1292 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
1293 + NFSX_V3WRITEVERF);
1294 rlen = fxdr_unsigned(int, *tl++);
1299 } else if (rlen < len) {
1300 backup = len - rlen;
1301 uiop->uio_iov->iov_base -= backup;
1302 uiop->uio_iov->iov_len += backup;
1303 uiop->uio_offset -= backup;
1304 uiop->uio_resid += backup;
1307 commit = fxdr_unsigned(int, *tl++);
1310 * Return the lowest committment level
1311 * obtained by any of the RPCs.
1313 if (committed == NFSV3WRITE_FILESYNC)
1315 else if (committed == NFSV3WRITE_DATASYNC &&
1316 commit == NFSV3WRITE_UNSTABLE)
1318 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){
1319 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1321 nmp->nm_state |= NFSSTA_HASWRITEVERF;
1322 } else if (bcmp((caddr_t)tl,
1323 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1325 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1330 nfsm_loadattr(vp, (struct vattr *)0);
1338 if (vp->v_mount->mnt_flag & MNT_ASYNC)
1339 committed = NFSV3WRITE_FILESYNC;
1340 *iomode = committed;
1342 uiop->uio_resid = tsiz;
1348 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1349 * mode set to specify the file type and the size field for rdev.
1352 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1355 struct nfsv2_sattr *sp;
1359 struct vnode *newvp = (struct vnode *)0;
1360 struct nfsnode *np = (struct nfsnode *)0;
1364 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
1365 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1367 int v3 = NFS_ISV3(dvp);
1369 if (vap->va_type == VCHR || vap->va_type == VBLK)
1370 rdev = txdr_unsigned(vap->va_rdev);
1371 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1374 return (EOPNOTSUPP);
1376 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
1379 nfsstats.rpccnt[NFSPROC_MKNOD]++;
1380 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED +
1381 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1382 nfsm_fhtom(dvp, v3);
1383 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1385 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1386 *tl++ = vtonfsv3_type(vap->va_type);
1387 nfsm_v3attrbuild(vap, FALSE);
1388 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1389 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1390 *tl++ = txdr_unsigned(umajor(vap->va_rdev));
1391 *tl = txdr_unsigned(uminor(vap->va_rdev));
1394 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1395 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1396 sp->sa_uid = nfs_xdrneg1;
1397 sp->sa_gid = nfs_xdrneg1;
1399 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1400 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1402 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_td, cnp->cn_cred);
1404 nfsm_mtofh(dvp, newvp, v3, gotvp);
1408 newvp = (struct vnode *)0;
1410 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1411 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1417 nfsm_wcc_data(dvp, wccflag);
1426 VTONFS(dvp)->n_flag |= NLMODIFIED;
1428 VTONFS(dvp)->n_attrstamp = 0;
1434 * just call nfs_mknodrpc() to do the work.
1436 * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
1437 * struct componentname *a_cnp, struct vattr *a_vap)
1441 nfs_mknod(struct vop_old_mknod_args *ap)
1443 return nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1446 static u_long create_verf;
1448 * nfs file create call
1450 * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
1451 * struct componentname *a_cnp, struct vattr *a_vap)
1454 nfs_create(struct vop_old_create_args *ap)
1456 struct vnode *dvp = ap->a_dvp;
1457 struct vattr *vap = ap->a_vap;
1458 struct componentname *cnp = ap->a_cnp;
1459 struct nfsv2_sattr *sp;
1463 struct nfsnode *np = (struct nfsnode *)0;
1464 struct vnode *newvp = (struct vnode *)0;
1465 caddr_t bpos, dpos, cp2;
1466 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
1467 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1469 int v3 = NFS_ISV3(dvp);
1472 * Oops, not for me..
1474 if (vap->va_type == VSOCK)
1475 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1477 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
1480 if (vap->va_vaflags & VA_EXCLUSIVE)
1483 nfsstats.rpccnt[NFSPROC_CREATE]++;
1484 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED +
1485 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1486 nfsm_fhtom(dvp, v3);
1487 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1489 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1490 if (fmode & O_EXCL) {
1491 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
1492 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF);
1494 if (!TAILQ_EMPTY(&in_ifaddrhead))
1495 *tl++ = IA_SIN(TAILQ_FIRST(&in_ifaddrhead))->sin_addr.s_addr;
1498 *tl++ = create_verf;
1499 *tl = ++create_verf;
1501 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
1502 nfsm_v3attrbuild(vap, FALSE);
1505 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1506 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1507 sp->sa_uid = nfs_xdrneg1;
1508 sp->sa_gid = nfs_xdrneg1;
1510 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1511 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1513 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_td, cnp->cn_cred);
1515 nfsm_mtofh(dvp, newvp, v3, gotvp);
1519 newvp = (struct vnode *)0;
1521 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1522 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1528 nfsm_wcc_data(dvp, wccflag);
1532 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
1538 } else if (v3 && (fmode & O_EXCL)) {
1540 * We are normally called with only a partially initialized
1541 * VAP. Since the NFSv3 spec says that server may use the
1542 * file attributes to store the verifier, the spec requires
1543 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1544 * in atime, but we can't really assume that all servers will
1545 * so we ensure that our SETATTR sets both atime and mtime.
1547 if (vap->va_mtime.tv_sec == VNOVAL)
1548 vfs_timestamp(&vap->va_mtime);
1549 if (vap->va_atime.tv_sec == VNOVAL)
1550 vap->va_atime = vap->va_mtime;
1551 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td);
1555 * The new np may have enough info for access
1556 * checks, make sure rucred and wucred are
1557 * initialized for read and write rpc's.
1560 if (np->n_rucred == NULL)
1561 np->n_rucred = crhold(cnp->cn_cred);
1562 if (np->n_wucred == NULL)
1563 np->n_wucred = crhold(cnp->cn_cred);
1566 VTONFS(dvp)->n_flag |= NLMODIFIED;
1568 VTONFS(dvp)->n_attrstamp = 0;
1573 * nfs file remove call
1574 * To try and make nfs semantics closer to ufs semantics, a file that has
1575 * other processes using the vnode is renamed instead of removed and then
1576 * removed later on the last close.
1577 * - If v_usecount > 1
1578 * If a rename is not already in the works
1579 * call nfs_sillyrename() to set it up
1583 * nfs_remove(struct vnode *a_dvp, struct vnode *a_vp,
1584 * struct componentname *a_cnp)
1587 nfs_remove(struct vop_old_remove_args *ap)
1589 struct vnode *vp = ap->a_vp;
1590 struct vnode *dvp = ap->a_dvp;
1591 struct componentname *cnp = ap->a_cnp;
1592 struct nfsnode *np = VTONFS(vp);
1597 if (vp->v_usecount < 1)
1598 panic("nfs_remove: bad v_usecount");
1600 if (vp->v_type == VDIR)
1602 else if (vp->v_usecount == 1 || (np->n_sillyrename &&
1603 VOP_GETATTR(vp, &vattr) == 0 &&
1604 vattr.va_nlink > 1)) {
1606 * throw away biocache buffers, mainly to avoid
1607 * unnecessary delayed writes later.
1609 error = nfs_vinvalbuf(vp, 0, 1);
1612 error = nfs_removerpc(dvp, cnp->cn_nameptr,
1613 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td);
1615 * Kludge City: If the first reply to the remove rpc is lost..
1616 * the reply to the retransmitted request will be ENOENT
1617 * since the file was in fact removed
1618 * Therefore, we cheat and return success.
1620 if (error == ENOENT)
1622 } else if (!np->n_sillyrename) {
1623 error = nfs_sillyrename(dvp, vp, cnp);
1625 np->n_attrstamp = 0;
1630 * nfs file remove rpc called from nfs_inactive
1633 nfs_removeit(struct sillyrename *sp)
1635 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen,
1640 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1643 nfs_removerpc(struct vnode *dvp, const char *name, int namelen,
1644 struct ucred *cred, struct thread *td)
1649 caddr_t bpos, dpos, cp2;
1650 int error = 0, wccflag = NFSV3_WCCRATTR;
1651 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1652 int v3 = NFS_ISV3(dvp);
1654 nfsstats.rpccnt[NFSPROC_REMOVE]++;
1655 nfsm_reqhead(dvp, NFSPROC_REMOVE,
1656 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1657 nfsm_fhtom(dvp, v3);
1658 nfsm_strtom(name, namelen, NFS_MAXNAMLEN);
1659 nfsm_request(dvp, NFSPROC_REMOVE, td, cred);
1661 nfsm_wcc_data(dvp, wccflag);
1664 VTONFS(dvp)->n_flag |= NLMODIFIED;
1666 VTONFS(dvp)->n_attrstamp = 0;
1671 * nfs file rename call
1673 * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
1674 * struct componentname *a_fcnp, struct vnode *a_tdvp,
1675 * struct vnode *a_tvp, struct componentname *a_tcnp)
1678 nfs_rename(struct vop_old_rename_args *ap)
1680 struct vnode *fvp = ap->a_fvp;
1681 struct vnode *tvp = ap->a_tvp;
1682 struct vnode *fdvp = ap->a_fdvp;
1683 struct vnode *tdvp = ap->a_tdvp;
1684 struct componentname *tcnp = ap->a_tcnp;
1685 struct componentname *fcnp = ap->a_fcnp;
1688 /* Check for cross-device rename */
1689 if ((fvp->v_mount != tdvp->v_mount) ||
1690 (tvp && (fvp->v_mount != tvp->v_mount))) {
1696 * We have to flush B_DELWRI data prior to renaming
1697 * the file. If we don't, the delayed-write buffers
1698 * can be flushed out later after the file has gone stale
1699 * under NFSV3. NFSV2 does not have this problem because
1700 * ( as far as I can tell ) it flushes dirty buffers more
1704 VOP_FSYNC(fvp, MNT_WAIT);
1706 VOP_FSYNC(tvp, MNT_WAIT);
1709 * If the tvp exists and is in use, sillyrename it before doing the
1710 * rename of the new file over it.
1712 * XXX Can't sillyrename a directory.
1714 * We do not attempt to do any namecache purges in this old API
1715 * routine. The new API compat functions have access to the actual
1716 * namecache structures and will do it for us.
1718 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename &&
1719 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1726 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1727 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1740 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1742 if (error == ENOENT)
1748 * nfs file rename rpc called from nfs_remove() above
1751 nfs_renameit(struct vnode *sdvp, struct componentname *scnp,
1752 struct sillyrename *sp)
1754 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
1755 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td));
1759 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1762 nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen,
1763 struct vnode *tdvp, const char *tnameptr, int tnamelen,
1764 struct ucred *cred, struct thread *td)
1769 caddr_t bpos, dpos, cp2;
1770 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
1771 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1772 int v3 = NFS_ISV3(fdvp);
1774 nfsstats.rpccnt[NFSPROC_RENAME]++;
1775 nfsm_reqhead(fdvp, NFSPROC_RENAME,
1776 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) +
1777 nfsm_rndup(tnamelen));
1778 nfsm_fhtom(fdvp, v3);
1779 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN);
1780 nfsm_fhtom(tdvp, v3);
1781 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN);
1782 nfsm_request(fdvp, NFSPROC_RENAME, td, cred);
1784 nfsm_wcc_data(fdvp, fwccflag);
1785 nfsm_wcc_data(tdvp, twccflag);
1789 VTONFS(fdvp)->n_flag |= NLMODIFIED;
1790 VTONFS(tdvp)->n_flag |= NLMODIFIED;
1792 VTONFS(fdvp)->n_attrstamp = 0;
1794 VTONFS(tdvp)->n_attrstamp = 0;
1799 * nfs hard link create call
1801 * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp,
1802 * struct componentname *a_cnp)
1805 nfs_link(struct vop_old_link_args *ap)
1807 struct vnode *vp = ap->a_vp;
1808 struct vnode *tdvp = ap->a_tdvp;
1809 struct componentname *cnp = ap->a_cnp;
1813 caddr_t bpos, dpos, cp2;
1814 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
1815 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1818 if (vp->v_mount != tdvp->v_mount) {
1823 * Push all writes to the server, so that the attribute cache
1824 * doesn't get "out of sync" with the server.
1825 * XXX There should be a better way!
1827 VOP_FSYNC(vp, MNT_WAIT);
1830 nfsstats.rpccnt[NFSPROC_LINK]++;
1831 nfsm_reqhead(vp, NFSPROC_LINK,
1832 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
1834 nfsm_fhtom(tdvp, v3);
1835 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1836 nfsm_request(vp, NFSPROC_LINK, cnp->cn_td, cnp->cn_cred);
1838 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
1839 nfsm_wcc_data(tdvp, wccflag);
1843 VTONFS(tdvp)->n_flag |= NLMODIFIED;
1845 VTONFS(vp)->n_attrstamp = 0;
1847 VTONFS(tdvp)->n_attrstamp = 0;
1849 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1851 if (error == EEXIST)
1857 * nfs symbolic link create call
1859 * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1860 * struct componentname *a_cnp, struct vattr *a_vap,
1864 nfs_symlink(struct vop_old_symlink_args *ap)
1866 struct vnode *dvp = ap->a_dvp;
1867 struct vattr *vap = ap->a_vap;
1868 struct componentname *cnp = ap->a_cnp;
1869 struct nfsv2_sattr *sp;
1873 caddr_t bpos, dpos, cp2;
1874 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
1875 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1876 struct vnode *newvp = (struct vnode *)0;
1877 int v3 = NFS_ISV3(dvp);
1879 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1880 slen = strlen(ap->a_target);
1881 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED +
1882 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3));
1883 nfsm_fhtom(dvp, v3);
1884 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1886 nfsm_v3attrbuild(vap, FALSE);
1888 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
1890 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1891 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
1892 sp->sa_uid = nfs_xdrneg1;
1893 sp->sa_gid = nfs_xdrneg1;
1894 sp->sa_size = nfs_xdrneg1;
1895 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1896 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1900 * Issue the NFS request and get the rpc response.
1902 * Only NFSv3 responses returning an error of 0 actually return
1903 * a file handle that can be converted into newvp without having
1904 * to do an extra lookup rpc.
1906 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_td, cnp->cn_cred);
1909 nfsm_mtofh(dvp, newvp, v3, gotvp);
1910 nfsm_wcc_data(dvp, wccflag);
1914 * out code jumps -> here, mrep is also freed.
1921 * If we get an EEXIST error, silently convert it to no-error
1922 * in case of an NFS retry.
1924 if (error == EEXIST)
1928 * If we do not have (or no longer have) an error, and we could
1929 * not extract the newvp from the response due to the request being
1930 * NFSv2 or the error being EEXIST. We have to do a lookup in order
1931 * to obtain a newvp to return.
1933 if (error == 0 && newvp == NULL) {
1934 struct nfsnode *np = NULL;
1936 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1937 cnp->cn_cred, cnp->cn_td, &np);
1947 VTONFS(dvp)->n_flag |= NLMODIFIED;
1949 VTONFS(dvp)->n_attrstamp = 0;
1956 * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
1957 * struct componentname *a_cnp, struct vattr *a_vap)
1960 nfs_mkdir(struct vop_old_mkdir_args *ap)
1962 struct vnode *dvp = ap->a_dvp;
1963 struct vattr *vap = ap->a_vap;
1964 struct componentname *cnp = ap->a_cnp;
1965 struct nfsv2_sattr *sp;
1970 struct nfsnode *np = (struct nfsnode *)0;
1971 struct vnode *newvp = (struct vnode *)0;
1972 caddr_t bpos, dpos, cp2;
1973 int error = 0, wccflag = NFSV3_WCCRATTR;
1975 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1977 int v3 = NFS_ISV3(dvp);
1979 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
1982 len = cnp->cn_namelen;
1983 nfsstats.rpccnt[NFSPROC_MKDIR]++;
1984 nfsm_reqhead(dvp, NFSPROC_MKDIR,
1985 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3));
1986 nfsm_fhtom(dvp, v3);
1987 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
1989 nfsm_v3attrbuild(vap, FALSE);
1991 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1992 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
1993 sp->sa_uid = nfs_xdrneg1;
1994 sp->sa_gid = nfs_xdrneg1;
1995 sp->sa_size = nfs_xdrneg1;
1996 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1997 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1999 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_td, cnp->cn_cred);
2001 nfsm_mtofh(dvp, newvp, v3, gotvp);
2003 nfsm_wcc_data(dvp, wccflag);
2006 VTONFS(dvp)->n_flag |= NLMODIFIED;
2008 VTONFS(dvp)->n_attrstamp = 0;
2010 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
2011 * if we can succeed in looking up the directory.
2013 if (error == EEXIST || (!error && !gotvp)) {
2016 newvp = (struct vnode *)0;
2018 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
2022 if (newvp->v_type != VDIR)
2035 * nfs remove directory call
2037 * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
2038 * struct componentname *a_cnp)
2041 nfs_rmdir(struct vop_old_rmdir_args *ap)
2043 struct vnode *vp = ap->a_vp;
2044 struct vnode *dvp = ap->a_dvp;
2045 struct componentname *cnp = ap->a_cnp;
2049 caddr_t bpos, dpos, cp2;
2050 int error = 0, wccflag = NFSV3_WCCRATTR;
2051 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2052 int v3 = NFS_ISV3(dvp);
2056 nfsstats.rpccnt[NFSPROC_RMDIR]++;
2057 nfsm_reqhead(dvp, NFSPROC_RMDIR,
2058 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
2059 nfsm_fhtom(dvp, v3);
2060 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
2061 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_td, cnp->cn_cred);
2063 nfsm_wcc_data(dvp, wccflag);
2066 VTONFS(dvp)->n_flag |= NLMODIFIED;
2068 VTONFS(dvp)->n_attrstamp = 0;
2070 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2072 if (error == ENOENT)
2080 * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
2083 nfs_readdir(struct vop_readdir_args *ap)
2085 struct vnode *vp = ap->a_vp;
2086 struct nfsnode *np = VTONFS(vp);
2087 struct uio *uio = ap->a_uio;
2091 if (vp->v_type != VDIR)
2094 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0)
2098 * If we have a valid EOF offset cache we must call VOP_GETATTR()
2099 * and then check that is still valid, or if this is an NQNFS mount
2100 * we call NQNFS_CKCACHEABLE() instead of VOP_GETATTR(). Note that
2101 * VOP_GETATTR() does not necessarily go to the wire.
2103 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2104 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0) {
2105 if (VOP_GETATTR(vp, &vattr) == 0 &&
2106 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0
2108 nfsstats.direofcache_hits++;
2114 * Call nfs_bioread() to do the real work. nfs_bioread() does its
2115 * own cache coherency checks so we do not have to.
2117 tresid = uio->uio_resid;
2118 error = nfs_bioread(vp, uio, 0);
2120 if (!error && uio->uio_resid == tresid)
2121 nfsstats.direofcache_misses++;
2128 * Readdir rpc call. nfs_bioread->nfs_doio->nfs_readdirrpc.
2130 * Note that for directories, nfs_bioread maintains the underlying nfs-centric
2131 * offset/block and converts the nfs formatted directory entries for userland
2132 * consumption as well as deals with offsets into the middle of blocks.
2133 * nfs_doio only deals with logical blocks. In particular, uio_offset will
2134 * be block-bounded. It must convert to cookies for the actual RPC.
2137 nfs_readdirrpc(struct vnode *vp, struct uio *uiop)
2140 struct nfs_dirent *dp = NULL;
2145 caddr_t bpos, dpos, cp2;
2146 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2148 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2149 struct nfsnode *dnp = VTONFS(vp);
2151 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2153 int v3 = NFS_ISV3(vp);
2156 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2157 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2158 panic("nfs readdirrpc bad uio");
2162 * If there is no cookie, assume directory was stale.
2164 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2168 return (NFSERR_BAD_COOKIE);
2170 * Loop around doing readdir rpc's of size nm_readdirsize
2171 * truncated to a multiple of DIRBLKSIZ.
2172 * The stopping criteria is EOF or buffer full.
2174 while (more_dirs && bigenough) {
2175 nfsstats.rpccnt[NFSPROC_READDIR]++;
2176 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) +
2180 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
2181 *tl++ = cookie.nfsuquad[0];
2182 *tl++ = cookie.nfsuquad[1];
2183 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2184 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2186 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2187 *tl++ = cookie.nfsuquad[0];
2189 *tl = txdr_unsigned(nmp->nm_readdirsize);
2190 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_td, nfs_vpcred(vp, ND_READ));
2192 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
2194 nfsm_dissect(tl, u_int32_t *,
2196 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2197 dnp->n_cookieverf.nfsuquad[1] = *tl;
2203 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2204 more_dirs = fxdr_unsigned(int, *tl);
2206 /* loop thru the dir entries, converting them to std form */
2207 while (more_dirs && bigenough) {
2209 nfsm_dissect(tl, u_int32_t *,
2211 fileno = fxdr_hyper(tl);
2212 len = fxdr_unsigned(int, *(tl + 2));
2214 nfsm_dissect(tl, u_int32_t *,
2216 fileno = fxdr_unsigned(u_quad_t, *tl++);
2217 len = fxdr_unsigned(int, *tl);
2219 if (len <= 0 || len > NFS_MAXNAMLEN) {
2226 * len is the number of bytes in the path element
2227 * name, not including the \0 termination.
2229 * tlen is the number of bytes w have to reserve for
2230 * the path element name.
2232 tlen = nfsm_rndup(len);
2234 tlen += 4; /* To ensure null termination */
2237 * If the entry would cross a DIRBLKSIZ boundary,
2238 * extend the previous nfs_dirent to cover the
2241 left = DIRBLKSIZ - blksiz;
2242 if ((tlen + sizeof(struct nfs_dirent)) > left) {
2243 dp->nfs_reclen += left;
2244 uiop->uio_iov->iov_base += left;
2245 uiop->uio_iov->iov_len -= left;
2246 uiop->uio_offset += left;
2247 uiop->uio_resid -= left;
2250 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid)
2253 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base;
2254 dp->nfs_ino = fileno;
2255 dp->nfs_namlen = len;
2256 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent);
2257 dp->nfs_type = DT_UNKNOWN;
2258 blksiz += dp->nfs_reclen;
2259 if (blksiz == DIRBLKSIZ)
2261 uiop->uio_offset += sizeof(struct nfs_dirent);
2262 uiop->uio_resid -= sizeof(struct nfs_dirent);
2263 uiop->uio_iov->iov_base += sizeof(struct nfs_dirent);
2264 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent);
2265 nfsm_mtouio(uiop, len);
2268 * The uiop has advanced by nfs_dirent + len
2269 * but really needs to advance by
2272 cp = uiop->uio_iov->iov_base;
2274 *cp = '\0'; /* null terminate */
2275 uiop->uio_iov->iov_base += tlen;
2276 uiop->uio_iov->iov_len -= tlen;
2277 uiop->uio_offset += tlen;
2278 uiop->uio_resid -= tlen;
2281 * NFS strings must be rounded up (nfsm_myouio
2282 * handled that in the bigenough case).
2284 nfsm_adv(nfsm_rndup(len));
2287 nfsm_dissect(tl, u_int32_t *,
2290 nfsm_dissect(tl, u_int32_t *,
2295 * If we were able to accomodate the last entry,
2296 * get the cookie for the next one. Otherwise
2297 * hold-over the cookie for the one we were not
2298 * able to accomodate.
2301 cookie.nfsuquad[0] = *tl++;
2303 cookie.nfsuquad[1] = *tl++;
2309 more_dirs = fxdr_unsigned(int, *tl);
2312 * If at end of rpc data, get the eof boolean
2315 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2316 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2321 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2322 * by increasing d_reclen for the last record.
2325 left = DIRBLKSIZ - blksiz;
2326 dp->nfs_reclen += left;
2327 uiop->uio_iov->iov_base += left;
2328 uiop->uio_iov->iov_len -= left;
2329 uiop->uio_offset += left;
2330 uiop->uio_resid -= left;
2335 * We hit the end of the directory, update direofoffset.
2337 dnp->n_direofoffset = uiop->uio_offset;
2340 * There is more to go, insert the link cookie so the
2341 * next block can be read.
2343 if (uiop->uio_resid > 0)
2344 printf("EEK! readdirrpc resid > 0\n");
2345 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2353 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2356 nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop)
2359 struct nfs_dirent *dp;
2363 struct vnode *newvp;
2365 caddr_t bpos, dpos, cp2, dpossav1, dpossav2;
2366 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2;
2368 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2369 struct nfsnode *dnp = VTONFS(vp), *np;
2372 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2373 int attrflag, fhsize;
2374 struct namecache *ncp;
2375 struct namecache *dncp;
2376 struct nlcomponent nlc;
2382 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2383 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2384 panic("nfs readdirplusrpc bad uio");
2387 * Obtain the namecache record for the directory so we have something
2388 * to use as a basis for creating the entries. This function will
2389 * return a held (but not locked) ncp. The ncp may be disconnected
2390 * from the tree and cannot be used for upward traversals, and the
2391 * ncp may be unnamed. Note that other unrelated operations may
2392 * cause the ncp to be named at any time.
2394 dncp = cache_fromdvp(vp, NULL, 0);
2395 bzero(&nlc, sizeof(nlc));
2399 * If there is no cookie, assume directory was stale.
2401 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2405 return (NFSERR_BAD_COOKIE);
2407 * Loop around doing readdir rpc's of size nm_readdirsize
2408 * truncated to a multiple of DIRBLKSIZ.
2409 * The stopping criteria is EOF or buffer full.
2411 while (more_dirs && bigenough) {
2412 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
2413 nfsm_reqhead(vp, NFSPROC_READDIRPLUS,
2414 NFSX_FH(1) + 6 * NFSX_UNSIGNED);
2416 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
2417 *tl++ = cookie.nfsuquad[0];
2418 *tl++ = cookie.nfsuquad[1];
2419 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2420 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2421 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2422 *tl = txdr_unsigned(nmp->nm_rsize);
2423 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_td, nfs_vpcred(vp, ND_READ));
2424 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
2429 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2430 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2431 dnp->n_cookieverf.nfsuquad[1] = *tl++;
2432 more_dirs = fxdr_unsigned(int, *tl);
2434 /* loop thru the dir entries, doctoring them to 4bsd form */
2435 while (more_dirs && bigenough) {
2436 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2437 fileno = fxdr_hyper(tl);
2438 len = fxdr_unsigned(int, *(tl + 2));
2439 if (len <= 0 || len > NFS_MAXNAMLEN) {
2444 tlen = nfsm_rndup(len);
2446 tlen += 4; /* To ensure null termination*/
2447 left = DIRBLKSIZ - blksiz;
2448 if ((tlen + sizeof(struct nfs_dirent)) > left) {
2449 dp->nfs_reclen += left;
2450 uiop->uio_iov->iov_base += left;
2451 uiop->uio_iov->iov_len -= left;
2452 uiop->uio_offset += left;
2453 uiop->uio_resid -= left;
2456 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid)
2459 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base;
2460 dp->nfs_ino = fileno;
2461 dp->nfs_namlen = len;
2462 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent);
2463 dp->nfs_type = DT_UNKNOWN;
2464 blksiz += dp->nfs_reclen;
2465 if (blksiz == DIRBLKSIZ)
2467 uiop->uio_offset += sizeof(struct nfs_dirent);
2468 uiop->uio_resid -= sizeof(struct nfs_dirent);
2469 uiop->uio_iov->iov_base += sizeof(struct nfs_dirent);
2470 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent);
2471 nlc.nlc_nameptr = uiop->uio_iov->iov_base;
2472 nlc.nlc_namelen = len;
2473 nfsm_mtouio(uiop, len);
2474 cp = uiop->uio_iov->iov_base;
2477 uiop->uio_iov->iov_base += tlen;
2478 uiop->uio_iov->iov_len -= tlen;
2479 uiop->uio_offset += tlen;
2480 uiop->uio_resid -= tlen;
2482 nfsm_adv(nfsm_rndup(len));
2483 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2485 cookie.nfsuquad[0] = *tl++;
2486 cookie.nfsuquad[1] = *tl++;
2491 * Since the attributes are before the file handle
2492 * (sigh), we must skip over the attributes and then
2493 * come back and get them.
2495 attrflag = fxdr_unsigned(int, *tl);
2499 nfsm_adv(NFSX_V3FATTR);
2500 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2501 doit = fxdr_unsigned(int, *tl);
2503 nfsm_getfh(fhp, fhsize, 1);
2504 if (NFS_CMPFH(dnp, fhp, fhsize)) {
2509 error = nfs_nget(vp->v_mount, fhp,
2517 if (doit && bigenough) {
2522 nfsm_loadattr(newvp, (struct vattr *)0);
2526 IFTODT(VTTOIF(np->n_vattr.va_type));
2528 printf("NFS/READDIRPLUS, ENTER %*.*s\n",
2529 nlc.nlc_namelen, nlc.nlc_namelen,
2531 ncp = cache_nlookup(dncp, &nlc);
2532 cache_setunresolved(ncp);
2533 cache_setvp(ncp, newvp);
2536 printf("NFS/READDIRPLUS, UNABLE TO ENTER"
2538 nlc.nlc_namelen, nlc.nlc_namelen,
2543 /* Just skip over the file handle */
2544 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2545 i = fxdr_unsigned(int, *tl);
2546 nfsm_adv(nfsm_rndup(i));
2548 if (newvp != NULLVP) {
2555 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2556 more_dirs = fxdr_unsigned(int, *tl);
2559 * If at end of rpc data, get the eof boolean
2562 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2563 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2568 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2569 * by increasing d_reclen for the last record.
2572 left = DIRBLKSIZ - blksiz;
2573 dp->nfs_reclen += left;
2574 uiop->uio_iov->iov_base += left;
2575 uiop->uio_iov->iov_len -= left;
2576 uiop->uio_offset += left;
2577 uiop->uio_resid -= left;
2581 * We are now either at the end of the directory or have filled the
2585 dnp->n_direofoffset = uiop->uio_offset;
2587 if (uiop->uio_resid > 0)
2588 printf("EEK! readdirplusrpc resid > 0\n");
2589 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2593 if (newvp != NULLVP) {
2606 * Silly rename. To make the NFS filesystem that is stateless look a little
2607 * more like the "ufs" a remove of an active vnode is translated to a rename
2608 * to a funny looking filename that is removed by nfs_inactive on the
2609 * nfsnode. There is the potential for another process on a different client
2610 * to create the same funny name between the nfs_lookitup() fails and the
2611 * nfs_rename() completes, but...
2614 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2616 struct sillyrename *sp;
2621 * We previously purged dvp instead of vp. I don't know why, it
2622 * completely destroys performance. We can't do it anyway with the
2623 * new VFS API since we would be breaking the namecache topology.
2625 cache_purge(vp); /* XXX */
2628 if (vp->v_type == VDIR)
2629 panic("nfs: sillyrename dir");
2631 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2632 M_NFSREQ, M_WAITOK);
2633 sp->s_cred = crdup(cnp->cn_cred);
2637 /* Fudge together a funny name */
2638 sp->s_namlen = sprintf(sp->s_name, ".nfsA%08x4.4", (int)cnp->cn_td);
2640 /* Try lookitups until we get one that isn't there */
2641 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2642 cnp->cn_td, (struct nfsnode **)0) == 0) {
2644 if (sp->s_name[4] > 'z') {
2649 error = nfs_renameit(dvp, cnp, sp);
2652 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2654 np->n_sillyrename = sp;
2659 kfree((caddr_t)sp, M_NFSREQ);
2664 * Look up a file name and optionally either update the file handle or
2665 * allocate an nfsnode, depending on the value of npp.
2666 * npp == NULL --> just do the lookup
2667 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2669 * *npp != NULL --> update the file handle in the vnode
2672 nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred,
2673 struct thread *td, struct nfsnode **npp)
2678 struct vnode *newvp = (struct vnode *)0;
2679 struct nfsnode *np, *dnp = VTONFS(dvp);
2680 caddr_t bpos, dpos, cp2;
2681 int error = 0, fhlen, attrflag;
2682 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2684 int v3 = NFS_ISV3(dvp);
2686 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
2687 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
2688 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2689 nfsm_fhtom(dvp, v3);
2690 nfsm_strtom(name, len, NFS_MAXNAMLEN);
2691 nfsm_request(dvp, NFSPROC_LOOKUP, td, cred);
2692 if (npp && !error) {
2693 nfsm_getfh(nfhp, fhlen, v3);
2696 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2697 kfree((caddr_t)np->n_fhp, M_NFSBIGFH);
2698 np->n_fhp = &np->n_fh;
2699 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2700 np->n_fhp =(nfsfh_t *)kmalloc(fhlen,M_NFSBIGFH,M_WAITOK);
2701 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2702 np->n_fhsize = fhlen;
2704 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
2708 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
2716 nfsm_postop_attr(newvp, attrflag, NFS_LATTR_NOSHRINK);
2717 if (!attrflag && *npp == NULL) {
2726 nfsm_loadattr(newvp, (struct vattr *)0);
2730 if (npp && *npp == NULL) {
2745 * Nfs Version 3 commit rpc
2748 nfs_commit(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td)
2753 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2754 caddr_t bpos, dpos, cp2;
2755 int error = 0, wccflag = NFSV3_WCCRATTR;
2756 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2758 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
2760 nfsstats.rpccnt[NFSPROC_COMMIT]++;
2761 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1));
2763 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2764 txdr_hyper(offset, tl);
2766 *tl = txdr_unsigned(cnt);
2767 nfsm_request(vp, NFSPROC_COMMIT, td, nfs_vpcred(vp, ND_WRITE));
2768 nfsm_wcc_data(vp, wccflag);
2770 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF);
2771 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
2772 NFSX_V3WRITEVERF)) {
2773 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
2775 error = NFSERR_STALEWRITEVERF;
2785 * - make nfs_bmap() essentially a no-op that does no translation
2786 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
2787 * (Maybe I could use the process's page mapping, but I was concerned that
2788 * Kernel Write might not be enabled and also figured copyout() would do
2789 * a lot more work than bcopy() and also it currently happens in the
2790 * context of the swapper process (2).
2792 * nfs_bmap(struct vnode *a_vp, off_t a_loffset, struct vnode **a_vpp,
2793 * off_t *a_doffsetp, int *a_runp, int *a_runb)
2796 nfs_bmap(struct vop_bmap_args *ap)
2798 struct vnode *vp = ap->a_vp;
2800 if (ap->a_vpp != NULL)
2802 if (ap->a_doffsetp != NULL)
2803 *ap->a_doffsetp = ap->a_loffset;
2804 if (ap->a_runp != NULL)
2806 if (ap->a_runb != NULL)
2814 * For async requests when nfsiod(s) are running, queue the request by
2815 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the
2819 nfs_strategy(struct vop_strategy_args *ap)
2821 struct bio *bio = ap->a_bio;
2823 struct buf *bp = bio->bio_buf;
2827 KASSERT(bp->b_cmd != BUF_CMD_DONE,
2828 ("nfs_strategy: buffer %p unexpectedly marked done", bp));
2829 KASSERT(BUF_REFCNT(bp) > 0,
2830 ("nfs_strategy: buffer %p not locked", bp));
2832 if (bp->b_flags & B_ASYNC)
2835 td = curthread; /* XXX */
2838 * We probably don't need to push an nbio any more since no
2839 * block conversion is required due to the use of 64 bit byte
2840 * offsets, but do it anyway.
2842 nbio = push_bio(bio);
2843 nbio->bio_offset = bio->bio_offset;
2846 * If the op is asynchronous and an i/o daemon is waiting
2847 * queue the request, wake it up and wait for completion
2848 * otherwise just do it ourselves.
2850 if ((bp->b_flags & B_ASYNC) == 0 || nfs_asyncio(ap->a_vp, nbio, td))
2851 error = nfs_doio(ap->a_vp, nbio, td);
2858 * NB Currently unsupported.
2860 * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred,
2861 * struct thread *a_td)
2865 nfs_mmap(struct vop_mmap_args *ap)
2871 * fsync vnode op. Just call nfs_flush() with commit == 1.
2873 * nfs_fsync(struct vnode *a_vp, struct ucred * a_cred, int a_waitfor,
2874 * struct thread *a_td)
2878 nfs_fsync(struct vop_fsync_args *ap)
2880 return (nfs_flush(ap->a_vp, ap->a_waitfor, curthread, 1));
2884 * Flush all the blocks associated with a vnode. Dirty NFS buffers may be
2885 * in one of two states: If B_NEEDCOMMIT is clear then the buffer contains
2886 * new NFS data which needs to be written to the server. If B_NEEDCOMMIT is
2887 * set the buffer contains data that has already been written to the server
2888 * and which now needs a commit RPC.
2890 * If commit is 0 we only take one pass and only flush buffers containing new
2893 * If commit is 1 we take two passes, issuing a commit RPC in the second
2896 * If waitfor is MNT_WAIT and commit is 1, we loop as many times as required
2897 * to completely flush all pending data.
2899 * Note that the RB_SCAN code properly handles the case where the
2900 * callback might block and directly or indirectly (another thread) cause
2901 * the RB tree to change.
2904 #ifndef NFS_COMMITBVECSIZ
2905 #define NFS_COMMITBVECSIZ 16
2908 struct nfs_flush_info {
2909 enum { NFI_FLUSHNEW, NFI_COMMIT } mode;
2916 struct buf *bvary[NFS_COMMITBVECSIZ];
2922 static int nfs_flush_bp(struct buf *bp, void *data);
2923 static int nfs_flush_docommit(struct nfs_flush_info *info, int error);
2926 nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit)
2928 struct nfsnode *np = VTONFS(vp);
2929 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2930 struct nfs_flush_info info;
2933 bzero(&info, sizeof(info));
2936 info.waitfor = waitfor;
2937 info.slpflag = (nmp->nm_flag & NFSMNT_INT) ? PCATCH : 0;
2944 info.mode = NFI_FLUSHNEW;
2945 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
2946 nfs_flush_bp, &info);
2949 * Take a second pass if committing and no error occured.
2950 * Clean up any left over collection (whether an error
2953 if (commit && error == 0) {
2954 info.mode = NFI_COMMIT;
2955 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
2956 nfs_flush_bp, &info);
2958 error = nfs_flush_docommit(&info, error);
2962 * Wait for pending I/O to complete before checking whether
2963 * any further dirty buffers exist.
2965 while (waitfor == MNT_WAIT && vp->v_track_write.bk_active) {
2966 vp->v_track_write.bk_waitflag = 1;
2967 error = tsleep(&vp->v_track_write,
2968 info.slpflag, "nfsfsync", info.slptimeo);
2971 * We have to be able to break out if this
2972 * is an 'intr' mount.
2974 if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) {
2980 * Since we do not process pending signals,
2981 * once we get a PCATCH our tsleep() will no
2982 * longer sleep, switch to a fixed timeout
2985 if (info.slpflag == PCATCH) {
2987 info.slptimeo = 2 * hz;
2994 * Loop if we are flushing synchronous as well as committing,
2995 * and dirty buffers are still present. Otherwise we might livelock.
2997 } while (waitfor == MNT_WAIT && commit &&
2998 error == 0 && !RB_EMPTY(&vp->v_rbdirty_tree));
3001 * The callbacks have to return a negative error to terminate the
3008 * Deal with any error collection
3010 if (np->n_flag & NWRITEERR) {
3011 error = np->n_error;
3012 np->n_flag &= ~NWRITEERR;
3020 nfs_flush_bp(struct buf *bp, void *data)
3022 struct nfs_flush_info *info = data;
3027 switch(info->mode) {
3030 if (info->loops && info->waitfor == MNT_WAIT) {
3031 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT);
3033 int lkflags = LK_EXCLUSIVE | LK_SLEEPFAIL;
3034 if (info->slpflag & PCATCH)
3035 lkflags |= LK_PCATCH;
3036 error = BUF_TIMELOCK(bp, lkflags, "nfsfsync",
3040 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT);
3043 KKASSERT(bp->b_vp == info->vp);
3045 if ((bp->b_flags & B_DELWRI) == 0)
3046 panic("nfs_fsync: not dirty");
3047 if (bp->b_flags & B_NEEDCOMMIT) {
3054 bp->b_flags |= B_ASYNC;
3064 * Only process buffers in need of a commit which we can
3065 * immediately lock. This may prevent a buffer from being
3066 * committed, but the normal flush loop will block on the
3067 * same buffer so we shouldn't get into an endless loop.
3070 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
3071 (B_DELWRI | B_NEEDCOMMIT) ||
3072 BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT) != 0) {
3077 KKASSERT(bp->b_vp == info->vp);
3081 * NOTE: storing the bp in the bvary[] basically sets
3082 * it up for a commit operation.
3084 * We must call vfs_busy_pages() now so the commit operation
3085 * is interlocked with user modifications to memory mapped
3088 * Note: to avoid loopback deadlocks, we do not
3089 * assign b_runningbufspace.
3091 bp->b_cmd = BUF_CMD_WRITE;
3092 vfs_busy_pages(bp->b_vp, bp);
3093 info->bvary[info->bvsize] = bp;
3094 toff = bp->b_bio2.bio_offset + bp->b_dirtyoff;
3095 if (info->bvsize == 0 || toff < info->beg_off)
3096 info->beg_off = toff;
3097 toff += (off_t)(bp->b_dirtyend - bp->b_dirtyoff);
3098 if (info->bvsize == 0 || toff > info->end_off)
3099 info->end_off = toff;
3101 if (info->bvsize == NFS_COMMITBVECSIZ) {
3102 error = nfs_flush_docommit(info, 0);
3103 KKASSERT(info->bvsize == 0);
3112 nfs_flush_docommit(struct nfs_flush_info *info, int error)
3122 if (info->bvsize > 0) {
3124 * Commit data on the server, as required. Note that
3125 * nfs_commit will use the vnode's cred for the commit.
3126 * The NFSv3 commit RPC is limited to a 32 bit byte count.
3128 bytes = info->end_off - info->beg_off;
3129 if (bytes > 0x40000000)
3134 retv = nfs_commit(vp, info->beg_off,
3135 (int)bytes, info->td);
3136 if (retv == NFSERR_STALEWRITEVERF)
3137 nfs_clearcommit(vp->v_mount);
3141 * Now, either mark the blocks I/O done or mark the
3142 * blocks dirty, depending on whether the commit
3145 for (i = 0; i < info->bvsize; ++i) {
3146 bp = info->bvary[i];
3147 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
3150 * Error, leave B_DELWRI intact
3152 vfs_unbusy_pages(bp);
3153 bp->b_cmd = BUF_CMD_DONE;
3157 * Success, remove B_DELWRI ( bundirty() ).
3159 * b_dirtyoff/b_dirtyend seem to be NFS
3160 * specific. We should probably move that
3161 * into bundirty(). XXX
3163 * We are faking an I/O write, we have to
3164 * start the transaction in order to
3165 * immediately biodone() it.
3168 bp->b_flags |= B_ASYNC;
3170 bp->b_flags &= ~B_ERROR;
3171 bp->b_dirtyoff = bp->b_dirtyend = 0;
3173 biodone(&bp->b_bio1);
3182 * NFS advisory byte-level locks.
3183 * Currently unsupported.
3185 * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl,
3189 nfs_advlock(struct vop_advlock_args *ap)
3191 struct nfsnode *np = VTONFS(ap->a_vp);
3194 * The following kludge is to allow diskless support to work
3195 * until a real NFS lockd is implemented. Basically, just pretend
3196 * that this is a local lock.
3198 return (lf_advlock(ap, &(np->n_lockf), np->n_size));
3202 * Print out the contents of an nfsnode.
3204 * nfs_print(struct vnode *a_vp)
3207 nfs_print(struct vop_print_args *ap)
3209 struct vnode *vp = ap->a_vp;
3210 struct nfsnode *np = VTONFS(vp);
3212 printf("tag VT_NFS, fileid %ld fsid 0x%x",
3213 np->n_vattr.va_fileid, np->n_vattr.va_fsid);
3214 if (vp->v_type == VFIFO)
3221 * nfs special file access vnode op.
3222 * Essentially just get vattr and then imitate iaccess() since the device is
3223 * local to the client.
3225 * nfsspec_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
3226 * struct thread *a_td)
3229 nfsspec_access(struct vop_access_args *ap)
3233 struct ucred *cred = ap->a_cred;
3234 struct vnode *vp = ap->a_vp;
3235 mode_t mode = ap->a_mode;
3241 * Disallow write attempts on filesystems mounted read-only;
3242 * unless the file is a socket, fifo, or a block or character
3243 * device resident on the filesystem.
3245 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3246 switch (vp->v_type) {
3256 * If you're the super-user,
3257 * you always get access.
3259 if (cred->cr_uid == 0)
3262 error = VOP_GETATTR(vp, vap);
3266 * Access check is based on only one of owner, group, public.
3267 * If not owner, then check group. If not a member of the
3268 * group, then check public access.
3270 if (cred->cr_uid != vap->va_uid) {
3272 gp = cred->cr_groups;
3273 for (i = 0; i < cred->cr_ngroups; i++, gp++)
3274 if (vap->va_gid == *gp)
3280 error = (vap->va_mode & mode) == mode ? 0 : EACCES;
3285 * Read wrapper for special devices.
3287 * nfsspec_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3288 * struct ucred *a_cred)
3291 nfsspec_read(struct vop_read_args *ap)
3293 struct nfsnode *np = VTONFS(ap->a_vp);
3299 getnanotime(&np->n_atim);
3300 return (VOCALL(&spec_vnode_vops, &ap->a_head));
3304 * Write wrapper for special devices.
3306 * nfsspec_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3307 * struct ucred *a_cred)
3310 nfsspec_write(struct vop_write_args *ap)
3312 struct nfsnode *np = VTONFS(ap->a_vp);
3318 getnanotime(&np->n_mtim);
3319 return (VOCALL(&spec_vnode_vops, &ap->a_head));
3323 * Close wrapper for special devices.
3325 * Update the times on the nfsnode then do device close.
3327 * nfsspec_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
3328 * struct thread *a_td)
3331 nfsspec_close(struct vop_close_args *ap)
3333 struct vnode *vp = ap->a_vp;
3334 struct nfsnode *np = VTONFS(vp);
3337 if (np->n_flag & (NACC | NUPD)) {
3339 if (vp->v_usecount == 1 &&
3340 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3342 if (np->n_flag & NACC)
3343 vattr.va_atime = np->n_atim;
3344 if (np->n_flag & NUPD)
3345 vattr.va_mtime = np->n_mtim;
3346 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE));
3349 return (VOCALL(&spec_vnode_vops, &ap->a_head));
3353 * Read wrapper for fifos.
3355 * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3356 * struct ucred *a_cred)
3359 nfsfifo_read(struct vop_read_args *ap)
3361 struct nfsnode *np = VTONFS(ap->a_vp);
3367 getnanotime(&np->n_atim);
3368 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
3372 * Write wrapper for fifos.
3374 * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3375 * struct ucred *a_cred)
3378 nfsfifo_write(struct vop_write_args *ap)
3380 struct nfsnode *np = VTONFS(ap->a_vp);
3386 getnanotime(&np->n_mtim);
3387 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
3391 * Close wrapper for fifos.
3393 * Update the times on the nfsnode then do fifo close.
3395 * nfsfifo_close(struct vnode *a_vp, int a_fflag, struct thread *a_td)
3398 nfsfifo_close(struct vop_close_args *ap)
3400 struct vnode *vp = ap->a_vp;
3401 struct nfsnode *np = VTONFS(vp);
3405 if (np->n_flag & (NACC | NUPD)) {
3407 if (np->n_flag & NACC)
3409 if (np->n_flag & NUPD)
3412 if (vp->v_usecount == 1 &&
3413 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3415 if (np->n_flag & NACC)
3416 vattr.va_atime = np->n_atim;
3417 if (np->n_flag & NUPD)
3418 vattr.va_mtime = np->n_mtim;
3419 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE));
3422 return (VOCALL(&fifo_vnode_vops, &ap->a_head));