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 1.72 2007/06/15 17:25:05 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 NAMECACHE timeout");
237 static int nfspos_cache_timeout = NFS_MINATTRTIMO;
238 SYSCTL_INT(_vfs_nfs, OID_AUTO, pos_cache_timeout, CTLFLAG_RW,
239 &nfspos_cache_timeout, 0, "NFS POSITIVE NAMECACHE timeout");
241 static int nfsv3_commit_on_close = 0;
242 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
243 &nfsv3_commit_on_close, 0, "write+commit on close, else only write");
245 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
246 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
248 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
249 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
252 #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \
253 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \
254 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP)
256 nfs3_access_otw(struct vnode *vp, int wmode,
257 struct thread *td, struct ucred *cred)
261 int error = 0, attrflag;
263 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
264 caddr_t bpos, dpos, cp2;
268 struct nfsnode *np = VTONFS(vp);
270 nfsstats.rpccnt[NFSPROC_ACCESS]++;
271 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED);
273 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
274 *tl = txdr_unsigned(wmode);
275 nfsm_request(vp, NFSPROC_ACCESS, td, cred);
276 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
278 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
279 rmode = fxdr_unsigned(u_int32_t, *tl);
281 np->n_modeuid = cred->cr_uid;
282 np->n_modestamp = mycpu->gd_time_seconds;
290 * nfs access vnode op.
291 * For nfs version 2, just return ok. File accesses may fail later.
292 * For nfs version 3, use the access rpc to check accessibility. If file modes
293 * are changed on the server, accesses might still fail later.
295 * nfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
296 * struct thread *a_td)
299 nfs_access(struct vop_access_args *ap)
301 struct vnode *vp = ap->a_vp;
302 thread_t td = curthread;
304 u_int32_t mode, wmode;
305 int v3 = NFS_ISV3(vp);
306 struct nfsnode *np = VTONFS(vp);
309 * Disallow write attempts on filesystems mounted read-only;
310 * unless the file is a socket, fifo, or a block or character
311 * device resident on the filesystem.
313 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
314 switch (vp->v_type) {
324 * For nfs v3, check to see if we have done this recently, and if
325 * so return our cached result instead of making an ACCESS call.
326 * If not, do an access rpc, otherwise you are stuck emulating
327 * ufs_access() locally using the vattr. This may not be correct,
328 * since the server may apply other access criteria such as
329 * client uid-->server uid mapping that we do not know about.
332 if (ap->a_mode & VREAD)
333 mode = NFSV3ACCESS_READ;
336 if (vp->v_type != VDIR) {
337 if (ap->a_mode & VWRITE)
338 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
339 if (ap->a_mode & VEXEC)
340 mode |= NFSV3ACCESS_EXECUTE;
342 if (ap->a_mode & VWRITE)
343 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
345 if (ap->a_mode & VEXEC)
346 mode |= NFSV3ACCESS_LOOKUP;
348 /* XXX safety belt, only make blanket request if caching */
349 if (nfsaccess_cache_timeout > 0) {
350 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY |
351 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE |
352 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP;
358 * Does our cached result allow us to give a definite yes to
361 if (np->n_modestamp &&
362 (mycpu->gd_time_seconds < (np->n_modestamp + nfsaccess_cache_timeout)) &&
363 (ap->a_cred->cr_uid == np->n_modeuid) &&
364 ((np->n_mode & mode) == mode)) {
365 nfsstats.accesscache_hits++;
368 * Either a no, or a don't know. Go to the wire.
370 nfsstats.accesscache_misses++;
371 error = nfs3_access_otw(vp, wmode, td, ap->a_cred);
373 if ((np->n_mode & mode) != mode) {
379 if ((error = nfsspec_access(ap)) != 0)
383 * Attempt to prevent a mapped root from accessing a file
384 * which it shouldn't. We try to read a byte from the file
385 * if the user is root and the file is not zero length.
386 * After calling nfsspec_access, we should have the correct
389 if (ap->a_cred->cr_uid == 0 && (ap->a_mode & VREAD)
390 && VTONFS(vp)->n_size > 0) {
397 auio.uio_iov = &aiov;
401 auio.uio_segflg = UIO_SYSSPACE;
402 auio.uio_rw = UIO_READ;
405 if (vp->v_type == VREG) {
406 error = nfs_readrpc(vp, &auio);
407 } else if (vp->v_type == VDIR) {
409 bp = kmalloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
411 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
412 error = nfs_readdirrpc(vp, &auio);
414 } else if (vp->v_type == VLNK) {
415 error = nfs_readlinkrpc(vp, &auio);
422 * [re]record creds for reading and/or writing if access
423 * was granted. Assume the NFS server will grant read access
424 * for execute requests.
427 if ((ap->a_mode & (VREAD|VEXEC)) && ap->a_cred != np->n_rucred) {
430 crfree(np->n_rucred);
431 np->n_rucred = ap->a_cred;
433 if ((ap->a_mode & VWRITE) && ap->a_cred != np->n_wucred) {
436 crfree(np->n_wucred);
437 np->n_wucred = ap->a_cred;
445 * Check to see if the type is ok
446 * and that deletion is not in progress.
447 * For paged in text files, you will need to flush the page cache
448 * if consistency is lost.
450 * nfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
454 nfs_open(struct vop_open_args *ap)
456 struct vnode *vp = ap->a_vp;
457 struct nfsnode *np = VTONFS(vp);
461 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
463 kprintf("open eacces vtyp=%d\n",vp->v_type);
469 * Clear the attribute cache only if opening with write access. It
470 * is unclear if we should do this at all here, but we certainly
471 * should not clear the cache unconditionally simply because a file
474 if (ap->a_mode & FWRITE)
478 * For normal NFS, reconcile changes made locally verses
479 * changes made remotely. Note that VOP_GETATTR only goes
480 * to the wire if the cached attribute has timed out or been
483 * If local modifications have been made clear the attribute
484 * cache to force an attribute and modified time check. If
485 * GETATTR detects that the file has been changed by someone
486 * other then us it will set NRMODIFIED.
488 * If we are opening a directory and local changes have been
489 * made we have to invalidate the cache in order to ensure
490 * that we get the most up-to-date information from the
493 if (np->n_flag & NLMODIFIED) {
495 if (vp->v_type == VDIR) {
496 error = nfs_vinvalbuf(vp, V_SAVE, 1);
502 error = VOP_GETATTR(vp, &vattr);
505 if (np->n_flag & NRMODIFIED) {
506 if (vp->v_type == VDIR)
508 error = nfs_vinvalbuf(vp, V_SAVE, 1);
511 np->n_flag &= ~NRMODIFIED;
514 return (vop_stdopen(ap));
519 * What an NFS client should do upon close after writing is a debatable issue.
520 * Most NFS clients push delayed writes to the server upon close, basically for
522 * 1 - So that any write errors may be reported back to the client process
523 * doing the close system call. By far the two most likely errors are
524 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
525 * 2 - To put a worst case upper bound on cache inconsistency between
526 * multiple clients for the file.
527 * There is also a consistency problem for Version 2 of the protocol w.r.t.
528 * not being able to tell if other clients are writing a file concurrently,
529 * since there is no way of knowing if the changed modify time in the reply
530 * is only due to the write for this client.
531 * (NFS Version 3 provides weak cache consistency data in the reply that
532 * should be sufficient to detect and handle this case.)
534 * The current code does the following:
535 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
536 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
537 * or commit them (this satisfies 1 and 2 except for the
538 * case where the server crashes after this close but
539 * before the commit RPC, which is felt to be "good
540 * enough". Changing the last argument to nfs_flush() to
541 * a 1 would force a commit operation, if it is felt a
542 * commit is necessary now.
543 * for NQNFS - do nothing now, since 2 is dealt with via leases and
544 * 1 should be dealt with via an fsync() system call for
545 * cases where write errors are important.
547 * nfs_close(struct vnode *a_vp, int a_fflag,
548 * struct ucred *a_cred, struct thread *a_td)
552 nfs_close(struct vop_close_args *ap)
554 struct vnode *vp = ap->a_vp;
555 struct nfsnode *np = VTONFS(vp);
557 thread_t td = curthread;
559 if (vp->v_type == VREG) {
560 if (np->n_flag & NLMODIFIED) {
563 * Under NFSv3 we have dirty buffers to dispose of. We
564 * must flush them to the NFS server. We have the option
565 * of waiting all the way through the commit rpc or just
566 * waiting for the initial write. The default is to only
567 * wait through the initial write so the data is in the
568 * server's cache, which is roughly similar to the state
569 * a standard disk subsystem leaves the file in on close().
571 * We cannot clear the NLMODIFIED bit in np->n_flag due to
572 * potential races with other processes, and certainly
573 * cannot clear it if we don't commit.
575 int cm = nfsv3_commit_on_close ? 1 : 0;
576 error = nfs_flush(vp, MNT_WAIT, td, cm);
577 /* np->n_flag &= ~NLMODIFIED; */
579 error = nfs_vinvalbuf(vp, V_SAVE, 1);
583 if (np->n_flag & NWRITEERR) {
584 np->n_flag &= ~NWRITEERR;
593 * nfs getattr call from vfs.
595 * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred,
596 * struct thread *a_td)
599 nfs_getattr(struct vop_getattr_args *ap)
601 struct vnode *vp = ap->a_vp;
602 struct nfsnode *np = VTONFS(vp);
608 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
609 int v3 = NFS_ISV3(vp);
610 thread_t td = curthread;
613 * Update local times for special files.
615 if (np->n_flag & (NACC | NUPD))
618 * First look in the cache.
620 if (nfs_getattrcache(vp, ap->a_vap) == 0)
623 if (v3 && nfsaccess_cache_timeout > 0) {
624 nfsstats.accesscache_misses++;
625 nfs3_access_otw(vp, NFSV3ACCESS_ALL, td, nfs_vpcred(vp, ND_CHECK));
626 if (nfs_getattrcache(vp, ap->a_vap) == 0)
630 nfsstats.rpccnt[NFSPROC_GETATTR]++;
631 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3));
633 nfsm_request(vp, NFSPROC_GETATTR, td, nfs_vpcred(vp, ND_CHECK));
635 nfsm_loadattr(vp, ap->a_vap);
645 * nfs_setattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred)
648 nfs_setattr(struct vop_setattr_args *ap)
650 struct vnode *vp = ap->a_vp;
651 struct nfsnode *np = VTONFS(vp);
652 struct vattr *vap = ap->a_vap;
655 thread_t td = curthread;
662 * Setting of flags is not supported.
664 if (vap->va_flags != VNOVAL)
668 * Disallow write attempts if the filesystem is mounted read-only.
670 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
671 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
672 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
673 (vp->v_mount->mnt_flag & MNT_RDONLY))
675 if (vap->va_size != VNOVAL) {
676 switch (vp->v_type) {
683 if (vap->va_mtime.tv_sec == VNOVAL &&
684 vap->va_atime.tv_sec == VNOVAL &&
685 vap->va_mode == (mode_t)VNOVAL &&
686 vap->va_uid == (uid_t)VNOVAL &&
687 vap->va_gid == (gid_t)VNOVAL)
689 vap->va_size = VNOVAL;
693 * Disallow write attempts if the filesystem is
696 if (vp->v_mount->mnt_flag & MNT_RDONLY)
700 * This is nasty. The RPCs we send to flush pending
701 * data often return attribute information which is
702 * cached via a callback to nfs_loadattrcache(), which
703 * has the effect of changing our notion of the file
704 * size. Due to flushed appends and other operations
705 * the file size can be set to virtually anything,
706 * including values that do not match either the old
707 * or intended file size.
709 * When this condition is detected we must loop to
710 * try the operation again. Hopefully no more
711 * flushing is required on the loop so it works the
712 * second time around. THIS CASE ALMOST ALWAYS
717 error = nfs_meta_setsize(vp, td, vap->va_size);
719 if (np->n_flag & NLMODIFIED) {
720 if (vap->va_size == 0)
721 error = nfs_vinvalbuf(vp, 0, 1);
723 error = nfs_vinvalbuf(vp, V_SAVE, 1);
726 * note: this loop case almost always happens at
727 * least once per truncation.
729 if (error == 0 && np->n_size != vap->va_size)
731 np->n_vattr.va_size = vap->va_size;
734 } else if ((vap->va_mtime.tv_sec != VNOVAL ||
735 vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NLMODIFIED) &&
736 vp->v_type == VREG &&
737 (error = nfs_vinvalbuf(vp, V_SAVE, 1)) == EINTR
741 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
744 * Sanity check if a truncation was issued. This should only occur
745 * if multiple processes are racing on the same file.
747 if (error == 0 && vap->va_size != VNOVAL &&
748 np->n_size != vap->va_size) {
749 kprintf("NFS ftruncate: server disagrees on the file size: %lld/%lld/%lld\n", tsize, vap->va_size, np->n_size);
752 if (error && vap->va_size != VNOVAL) {
753 np->n_size = np->n_vattr.va_size = tsize;
754 vnode_pager_setsize(vp, np->n_size);
760 * Do an nfs setattr rpc.
763 nfs_setattrrpc(struct vnode *vp, struct vattr *vap,
764 struct ucred *cred, struct thread *td)
766 struct nfsv2_sattr *sp;
767 struct nfsnode *np = VTONFS(vp);
770 caddr_t bpos, dpos, cp2;
772 int error = 0, wccflag = NFSV3_WCCRATTR;
773 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
774 int v3 = NFS_ISV3(vp);
776 nfsstats.rpccnt[NFSPROC_SETATTR]++;
777 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3));
780 nfsm_v3attrbuild(vap, TRUE);
781 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
784 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
785 if (vap->va_mode == (mode_t)VNOVAL)
786 sp->sa_mode = nfs_xdrneg1;
788 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
789 if (vap->va_uid == (uid_t)VNOVAL)
790 sp->sa_uid = nfs_xdrneg1;
792 sp->sa_uid = txdr_unsigned(vap->va_uid);
793 if (vap->va_gid == (gid_t)VNOVAL)
794 sp->sa_gid = nfs_xdrneg1;
796 sp->sa_gid = txdr_unsigned(vap->va_gid);
797 sp->sa_size = txdr_unsigned(vap->va_size);
798 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
799 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
801 nfsm_request(vp, NFSPROC_SETATTR, td, cred);
804 nfsm_wcc_data(vp, wccflag);
806 nfsm_loadattr(vp, (struct vattr *)0);
814 nfs_cache_setvp(struct nchandle *nch, struct vnode *vp, int nctimeout)
820 cache_setvp(nch, vp);
821 cache_settimeout(nch, nctimeout);
825 * NEW API CALL - replaces nfs_lookup(). However, we cannot remove
826 * nfs_lookup() until all remaining new api calls are implemented.
828 * Resolve a namecache entry. This function is passed a locked ncp and
829 * must call nfs_cache_setvp() on it as appropriate to resolve the entry.
832 nfs_nresolve(struct vop_nresolve_args *ap)
834 struct thread *td = curthread;
835 struct namecache *ncp;
846 /******NFSM MACROS********/
847 struct mbuf *mb, *mrep, *mreq, *mb2, *md;
848 caddr_t bpos, dpos, cp, cp2;
853 ncp = ap->a_nch->ncp;
855 KKASSERT(ncp->nc_parent && ncp->nc_parent->nc_vp);
856 dvp = ncp->nc_parent->nc_vp;
857 if ((error = vget(dvp, LK_SHARED)) != 0)
862 nfsstats.lookupcache_misses++;
863 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
865 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
866 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
868 nfsm_strtom(ncp->nc_name, len, NFS_MAXNAMLEN);
869 nfsm_request(dvp, NFSPROC_LOOKUP, td, ap->a_cred);
872 * Cache negatve lookups to reduce NFS traffic, but use
873 * a fast timeout. Otherwise use a timeout of 1 tick.
874 * XXX we should add a namecache flag for no-caching
875 * to uncache the negative hit as soon as possible, but
876 * we cannot simply destroy the entry because it is used
877 * as a placeholder by the caller.
880 nfs_cache_setvp(ap->a_nch, NULL, nfsneg_cache_timeout);
881 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
887 * Success, get the file handle, do various checks, and load
888 * post-operation data from the reply packet. Theoretically
889 * we should never be looking up "." so, theoretically, we
890 * should never get the same file handle as our directory. But
891 * we check anyway. XXX
893 * Note that no timeout is set for the positive cache hit. We
894 * assume, theoretically, that ESTALE returns will be dealt with
895 * properly to handle NFS races and in anycase we cannot depend
896 * on a timeout to deal with NFS open/create/excl issues so instead
897 * of a bad hack here the rest of the NFS client code needs to do
900 nfsm_getfh(fhp, fhsize, v3);
903 if (NFS_CMPFH(np, fhp, fhsize)) {
907 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
916 nfsm_postop_attr(nvp, attrflag, NFS_LATTR_NOSHRINK);
917 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
919 nfsm_loadattr(nvp, NULL);
921 nfs_cache_setvp(ap->a_nch, nvp, nfspos_cache_timeout);
935 * 'cached' nfs directory lookup
937 * NOTE: cannot be removed until NFS implements all the new n*() API calls.
939 * nfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
940 * struct componentname *a_cnp)
943 nfs_lookup(struct vop_old_lookup_args *ap)
945 struct componentname *cnp = ap->a_cnp;
946 struct vnode *dvp = ap->a_dvp;
947 struct vnode **vpp = ap->a_vpp;
948 int flags = cnp->cn_flags;
953 struct nfsmount *nmp;
954 caddr_t bpos, dpos, cp2;
955 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
959 int lockparent, wantparent, error = 0, attrflag, fhsize;
960 int v3 = NFS_ISV3(dvp);
963 * Read-only mount check and directory check.
966 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) &&
967 (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME))
970 if (dvp->v_type != VDIR)
974 * Look it up in the cache. Note that ENOENT is only returned if we
975 * previously entered a negative hit (see later on). The additional
976 * nfsneg_cache_timeout check causes previously cached results to
977 * be instantly ignored if the negative caching is turned off.
979 lockparent = flags & CNP_LOCKPARENT;
980 wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT);
981 nmp = VFSTONFS(dvp->v_mount);
989 nfsstats.lookupcache_misses++;
990 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
991 len = cnp->cn_namelen;
992 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
993 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
995 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
996 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_td, cnp->cn_cred);
998 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
1002 nfsm_getfh(fhp, fhsize, v3);
1005 * Handle RENAME case...
1007 if (cnp->cn_nameiop == NAMEI_RENAME && wantparent) {
1008 if (NFS_CMPFH(np, fhp, fhsize)) {
1012 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1019 nfsm_postop_attr(newvp, attrflag, NFS_LATTR_NOSHRINK);
1020 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
1022 nfsm_loadattr(newvp, (struct vattr *)0);
1027 cnp->cn_flags |= CNP_PDIRUNLOCK;
1032 if (flags & CNP_ISDOTDOT) {
1034 cnp->cn_flags |= CNP_PDIRUNLOCK;
1035 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1037 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
1038 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
1039 return (error); /* NOTE: return error from nget */
1043 error = vn_lock(dvp, LK_EXCLUSIVE);
1048 cnp->cn_flags |= CNP_PDIRUNLOCK;
1050 } else if (NFS_CMPFH(np, fhp, fhsize)) {
1054 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1061 cnp->cn_flags |= CNP_PDIRUNLOCK;
1066 nfsm_postop_attr(newvp, attrflag, NFS_LATTR_NOSHRINK);
1067 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
1069 nfsm_loadattr(newvp, (struct vattr *)0);
1071 /* XXX MOVE TO nfs_nremove() */
1072 if ((cnp->cn_flags & CNP_MAKEENTRY) &&
1073 cnp->cn_nameiop != NAMEI_DELETE) {
1074 np->n_ctime = np->n_vattr.va_ctime.tv_sec; /* XXX */
1081 if (newvp != NULLVP) {
1085 if ((cnp->cn_nameiop == NAMEI_CREATE ||
1086 cnp->cn_nameiop == NAMEI_RENAME) &&
1090 cnp->cn_flags |= CNP_PDIRUNLOCK;
1092 if (dvp->v_mount->mnt_flag & MNT_RDONLY)
1095 error = EJUSTRETURN;
1103 * Just call nfs_bioread() to do the work.
1105 * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1106 * struct ucred *a_cred)
1109 nfs_read(struct vop_read_args *ap)
1111 struct vnode *vp = ap->a_vp;
1113 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
1114 switch (vp->v_type) {
1116 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
1127 * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
1130 nfs_readlink(struct vop_readlink_args *ap)
1132 struct vnode *vp = ap->a_vp;
1134 if (vp->v_type != VLNK)
1136 return (nfs_bioread(vp, ap->a_uio, 0));
1140 * Do a readlink rpc.
1141 * Called by nfs_doio() from below the buffer cache.
1144 nfs_readlinkrpc(struct vnode *vp, struct uio *uiop)
1149 caddr_t bpos, dpos, cp2;
1150 int error = 0, len, attrflag;
1151 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1152 int v3 = NFS_ISV3(vp);
1154 nfsstats.rpccnt[NFSPROC_READLINK]++;
1155 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3));
1157 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_td, nfs_vpcred(vp, ND_CHECK));
1159 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
1161 nfsm_strsiz(len, NFS_MAXPATHLEN);
1162 if (len == NFS_MAXPATHLEN) {
1163 struct nfsnode *np = VTONFS(vp);
1164 if (np->n_size && np->n_size < NFS_MAXPATHLEN)
1167 nfsm_mtouio(uiop, len);
1179 nfs_readrpc(struct vnode *vp, struct uio *uiop)
1184 caddr_t bpos, dpos, cp2;
1185 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1186 struct nfsmount *nmp;
1187 int error = 0, len, retlen, tsiz, eof, attrflag;
1188 int v3 = NFS_ISV3(vp);
1193 nmp = VFSTONFS(vp->v_mount);
1194 tsiz = uiop->uio_resid;
1195 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1198 nfsstats.rpccnt[NFSPROC_READ]++;
1199 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
1200 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3);
1202 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3);
1204 txdr_hyper(uiop->uio_offset, tl);
1205 *(tl + 2) = txdr_unsigned(len);
1207 *tl++ = txdr_unsigned(uiop->uio_offset);
1208 *tl++ = txdr_unsigned(len);
1211 nfsm_request(vp, NFSPROC_READ, uiop->uio_td, nfs_vpcred(vp, ND_READ));
1213 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
1218 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1219 eof = fxdr_unsigned(int, *(tl + 1));
1221 nfsm_loadattr(vp, (struct vattr *)0);
1222 nfsm_strsiz(retlen, nmp->nm_rsize);
1223 nfsm_mtouio(uiop, retlen);
1227 if (eof || retlen == 0) {
1230 } else if (retlen < len) {
1242 nfs_writerpc(struct vnode *vp, struct uio *uiop, int *iomode, int *must_commit)
1246 int32_t t1, t2, backup;
1247 caddr_t bpos, dpos, cp2;
1248 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1249 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1250 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
1251 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC;
1254 if (uiop->uio_iovcnt != 1)
1255 panic("nfs: writerpc iovcnt > 1");
1258 tsiz = uiop->uio_resid;
1259 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1262 nfsstats.rpccnt[NFSPROC_WRITE]++;
1263 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1264 nfsm_reqhead(vp, NFSPROC_WRITE,
1265 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len));
1268 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
1269 txdr_hyper(uiop->uio_offset, tl);
1271 *tl++ = txdr_unsigned(len);
1272 *tl++ = txdr_unsigned(*iomode);
1273 *tl = txdr_unsigned(len);
1277 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1278 /* Set both "begin" and "current" to non-garbage. */
1279 x = txdr_unsigned((u_int32_t)uiop->uio_offset);
1280 *tl++ = x; /* "begin offset" */
1281 *tl++ = x; /* "current offset" */
1282 x = txdr_unsigned(len);
1283 *tl++ = x; /* total to this offset */
1284 *tl = x; /* size of this write */
1286 nfsm_uiotom(uiop, len);
1287 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_td, nfs_vpcred(vp, ND_WRITE));
1290 * The write RPC returns a before and after mtime. The
1291 * nfsm_wcc_data() macro checks the before n_mtime
1292 * against the before time and stores the after time
1293 * in the nfsnode's cached vattr and n_mtime field.
1294 * The NRMODIFIED bit will be set if the before
1295 * time did not match the original mtime.
1297 wccflag = NFSV3_WCCCHK;
1298 nfsm_wcc_data(vp, wccflag);
1300 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
1301 + NFSX_V3WRITEVERF);
1302 rlen = fxdr_unsigned(int, *tl++);
1307 } else if (rlen < len) {
1308 backup = len - rlen;
1309 uiop->uio_iov->iov_base -= backup;
1310 uiop->uio_iov->iov_len += backup;
1311 uiop->uio_offset -= backup;
1312 uiop->uio_resid += backup;
1315 commit = fxdr_unsigned(int, *tl++);
1318 * Return the lowest committment level
1319 * obtained by any of the RPCs.
1321 if (committed == NFSV3WRITE_FILESYNC)
1323 else if (committed == NFSV3WRITE_DATASYNC &&
1324 commit == NFSV3WRITE_UNSTABLE)
1326 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){
1327 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1329 nmp->nm_state |= NFSSTA_HASWRITEVERF;
1330 } else if (bcmp((caddr_t)tl,
1331 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1333 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1338 nfsm_loadattr(vp, (struct vattr *)0);
1346 if (vp->v_mount->mnt_flag & MNT_ASYNC)
1347 committed = NFSV3WRITE_FILESYNC;
1348 *iomode = committed;
1350 uiop->uio_resid = tsiz;
1356 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1357 * mode set to specify the file type and the size field for rdev.
1360 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1363 struct nfsv2_sattr *sp;
1367 struct vnode *newvp = (struct vnode *)0;
1368 struct nfsnode *np = (struct nfsnode *)0;
1372 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
1373 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1375 int v3 = NFS_ISV3(dvp);
1377 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1378 rmajor = txdr_unsigned(vap->va_rmajor);
1379 rminor = txdr_unsigned(vap->va_rminor);
1380 } else if (vap->va_type == VFIFO || vap->va_type == VSOCK) {
1381 rmajor = nfs_xdrneg1;
1382 rminor = nfs_xdrneg1;
1384 return (EOPNOTSUPP);
1386 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
1389 nfsstats.rpccnt[NFSPROC_MKNOD]++;
1390 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED +
1391 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1392 nfsm_fhtom(dvp, v3);
1393 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1395 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1396 *tl++ = vtonfsv3_type(vap->va_type);
1397 nfsm_v3attrbuild(vap, FALSE);
1398 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1399 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1400 *tl++ = txdr_unsigned(vap->va_rmajor);
1401 *tl = txdr_unsigned(vap->va_rminor);
1404 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1405 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1406 sp->sa_uid = nfs_xdrneg1;
1407 sp->sa_gid = nfs_xdrneg1;
1408 sp->sa_size = makeudev(rmajor, rminor);
1409 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1410 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1412 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_td, cnp->cn_cred);
1414 nfsm_mtofh(dvp, newvp, v3, gotvp);
1418 newvp = (struct vnode *)0;
1420 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1421 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1427 nfsm_wcc_data(dvp, wccflag);
1436 VTONFS(dvp)->n_flag |= NLMODIFIED;
1438 VTONFS(dvp)->n_attrstamp = 0;
1444 * just call nfs_mknodrpc() to do the work.
1446 * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
1447 * struct componentname *a_cnp, struct vattr *a_vap)
1451 nfs_mknod(struct vop_old_mknod_args *ap)
1453 return nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1456 static u_long create_verf;
1458 * nfs file create call
1460 * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
1461 * struct componentname *a_cnp, struct vattr *a_vap)
1464 nfs_create(struct vop_old_create_args *ap)
1466 struct vnode *dvp = ap->a_dvp;
1467 struct vattr *vap = ap->a_vap;
1468 struct componentname *cnp = ap->a_cnp;
1469 struct nfsv2_sattr *sp;
1473 struct nfsnode *np = (struct nfsnode *)0;
1474 struct vnode *newvp = (struct vnode *)0;
1475 caddr_t bpos, dpos, cp2;
1476 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
1477 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1479 int v3 = NFS_ISV3(dvp);
1482 * Oops, not for me..
1484 if (vap->va_type == VSOCK)
1485 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1487 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
1490 if (vap->va_vaflags & VA_EXCLUSIVE)
1493 nfsstats.rpccnt[NFSPROC_CREATE]++;
1494 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED +
1495 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1496 nfsm_fhtom(dvp, v3);
1497 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1499 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1500 if (fmode & O_EXCL) {
1501 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
1502 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF);
1504 if (!TAILQ_EMPTY(&in_ifaddrhead))
1505 *tl++ = IA_SIN(TAILQ_FIRST(&in_ifaddrhead))->sin_addr.s_addr;
1508 *tl++ = create_verf;
1509 *tl = ++create_verf;
1511 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
1512 nfsm_v3attrbuild(vap, FALSE);
1515 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1516 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1517 sp->sa_uid = nfs_xdrneg1;
1518 sp->sa_gid = nfs_xdrneg1;
1520 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1521 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1523 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_td, cnp->cn_cred);
1525 nfsm_mtofh(dvp, newvp, v3, gotvp);
1529 newvp = (struct vnode *)0;
1531 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1532 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1538 nfsm_wcc_data(dvp, wccflag);
1542 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
1548 } else if (v3 && (fmode & O_EXCL)) {
1550 * We are normally called with only a partially initialized
1551 * VAP. Since the NFSv3 spec says that server may use the
1552 * file attributes to store the verifier, the spec requires
1553 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1554 * in atime, but we can't really assume that all servers will
1555 * so we ensure that our SETATTR sets both atime and mtime.
1557 if (vap->va_mtime.tv_sec == VNOVAL)
1558 vfs_timestamp(&vap->va_mtime);
1559 if (vap->va_atime.tv_sec == VNOVAL)
1560 vap->va_atime = vap->va_mtime;
1561 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td);
1565 * The new np may have enough info for access
1566 * checks, make sure rucred and wucred are
1567 * initialized for read and write rpc's.
1570 if (np->n_rucred == NULL)
1571 np->n_rucred = crhold(cnp->cn_cred);
1572 if (np->n_wucred == NULL)
1573 np->n_wucred = crhold(cnp->cn_cred);
1576 VTONFS(dvp)->n_flag |= NLMODIFIED;
1578 VTONFS(dvp)->n_attrstamp = 0;
1583 * nfs file remove call
1584 * To try and make nfs semantics closer to ufs semantics, a file that has
1585 * other processes using the vnode is renamed instead of removed and then
1586 * removed later on the last close.
1587 * - If v_sysref.refcnt > 1
1588 * If a rename is not already in the works
1589 * call nfs_sillyrename() to set it up
1593 * nfs_remove(struct vnode *a_dvp, struct vnode *a_vp,
1594 * struct componentname *a_cnp)
1597 nfs_remove(struct vop_old_remove_args *ap)
1599 struct vnode *vp = ap->a_vp;
1600 struct vnode *dvp = ap->a_dvp;
1601 struct componentname *cnp = ap->a_cnp;
1602 struct nfsnode *np = VTONFS(vp);
1607 if (vp->v_sysref.refcnt < 1)
1608 panic("nfs_remove: bad v_sysref.refcnt");
1610 if (vp->v_type == VDIR)
1612 else if (vp->v_sysref.refcnt == 1 || (np->n_sillyrename &&
1613 VOP_GETATTR(vp, &vattr) == 0 &&
1614 vattr.va_nlink > 1)) {
1616 * throw away biocache buffers, mainly to avoid
1617 * unnecessary delayed writes later.
1619 error = nfs_vinvalbuf(vp, 0, 1);
1622 error = nfs_removerpc(dvp, cnp->cn_nameptr,
1623 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td);
1625 * Kludge City: If the first reply to the remove rpc is lost..
1626 * the reply to the retransmitted request will be ENOENT
1627 * since the file was in fact removed
1628 * Therefore, we cheat and return success.
1630 if (error == ENOENT)
1632 } else if (!np->n_sillyrename) {
1633 error = nfs_sillyrename(dvp, vp, cnp);
1635 np->n_attrstamp = 0;
1640 * nfs file remove rpc called from nfs_inactive
1643 nfs_removeit(struct sillyrename *sp)
1645 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen,
1650 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1653 nfs_removerpc(struct vnode *dvp, const char *name, int namelen,
1654 struct ucred *cred, struct thread *td)
1659 caddr_t bpos, dpos, cp2;
1660 int error = 0, wccflag = NFSV3_WCCRATTR;
1661 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1662 int v3 = NFS_ISV3(dvp);
1664 nfsstats.rpccnt[NFSPROC_REMOVE]++;
1665 nfsm_reqhead(dvp, NFSPROC_REMOVE,
1666 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1667 nfsm_fhtom(dvp, v3);
1668 nfsm_strtom(name, namelen, NFS_MAXNAMLEN);
1669 nfsm_request(dvp, NFSPROC_REMOVE, td, cred);
1671 nfsm_wcc_data(dvp, wccflag);
1674 VTONFS(dvp)->n_flag |= NLMODIFIED;
1676 VTONFS(dvp)->n_attrstamp = 0;
1681 * nfs file rename call
1683 * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
1684 * struct componentname *a_fcnp, struct vnode *a_tdvp,
1685 * struct vnode *a_tvp, struct componentname *a_tcnp)
1688 nfs_rename(struct vop_old_rename_args *ap)
1690 struct vnode *fvp = ap->a_fvp;
1691 struct vnode *tvp = ap->a_tvp;
1692 struct vnode *fdvp = ap->a_fdvp;
1693 struct vnode *tdvp = ap->a_tdvp;
1694 struct componentname *tcnp = ap->a_tcnp;
1695 struct componentname *fcnp = ap->a_fcnp;
1698 /* Check for cross-device rename */
1699 if ((fvp->v_mount != tdvp->v_mount) ||
1700 (tvp && (fvp->v_mount != tvp->v_mount))) {
1706 * We have to flush B_DELWRI data prior to renaming
1707 * the file. If we don't, the delayed-write buffers
1708 * can be flushed out later after the file has gone stale
1709 * under NFSV3. NFSV2 does not have this problem because
1710 * ( as far as I can tell ) it flushes dirty buffers more
1714 VOP_FSYNC(fvp, MNT_WAIT);
1716 VOP_FSYNC(tvp, MNT_WAIT);
1719 * If the tvp exists and is in use, sillyrename it before doing the
1720 * rename of the new file over it.
1722 * XXX Can't sillyrename a directory.
1724 * We do not attempt to do any namecache purges in this old API
1725 * routine. The new API compat functions have access to the actual
1726 * namecache structures and will do it for us.
1728 if (tvp && tvp->v_sysref.refcnt > 1 && !VTONFS(tvp)->n_sillyrename &&
1729 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1736 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1737 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1750 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1752 if (error == ENOENT)
1758 * nfs file rename rpc called from nfs_remove() above
1761 nfs_renameit(struct vnode *sdvp, struct componentname *scnp,
1762 struct sillyrename *sp)
1764 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
1765 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td));
1769 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1772 nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen,
1773 struct vnode *tdvp, const char *tnameptr, int tnamelen,
1774 struct ucred *cred, struct thread *td)
1779 caddr_t bpos, dpos, cp2;
1780 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
1781 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1782 int v3 = NFS_ISV3(fdvp);
1784 nfsstats.rpccnt[NFSPROC_RENAME]++;
1785 nfsm_reqhead(fdvp, NFSPROC_RENAME,
1786 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) +
1787 nfsm_rndup(tnamelen));
1788 nfsm_fhtom(fdvp, v3);
1789 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN);
1790 nfsm_fhtom(tdvp, v3);
1791 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN);
1792 nfsm_request(fdvp, NFSPROC_RENAME, td, cred);
1794 nfsm_wcc_data(fdvp, fwccflag);
1795 nfsm_wcc_data(tdvp, twccflag);
1799 VTONFS(fdvp)->n_flag |= NLMODIFIED;
1800 VTONFS(tdvp)->n_flag |= NLMODIFIED;
1802 VTONFS(fdvp)->n_attrstamp = 0;
1804 VTONFS(tdvp)->n_attrstamp = 0;
1809 * nfs hard link create call
1811 * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp,
1812 * struct componentname *a_cnp)
1815 nfs_link(struct vop_old_link_args *ap)
1817 struct vnode *vp = ap->a_vp;
1818 struct vnode *tdvp = ap->a_tdvp;
1819 struct componentname *cnp = ap->a_cnp;
1823 caddr_t bpos, dpos, cp2;
1824 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
1825 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1828 if (vp->v_mount != tdvp->v_mount) {
1833 * Push all writes to the server, so that the attribute cache
1834 * doesn't get "out of sync" with the server.
1835 * XXX There should be a better way!
1837 VOP_FSYNC(vp, MNT_WAIT);
1840 nfsstats.rpccnt[NFSPROC_LINK]++;
1841 nfsm_reqhead(vp, NFSPROC_LINK,
1842 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
1844 nfsm_fhtom(tdvp, v3);
1845 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1846 nfsm_request(vp, NFSPROC_LINK, cnp->cn_td, cnp->cn_cred);
1848 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
1849 nfsm_wcc_data(tdvp, wccflag);
1853 VTONFS(tdvp)->n_flag |= NLMODIFIED;
1855 VTONFS(vp)->n_attrstamp = 0;
1857 VTONFS(tdvp)->n_attrstamp = 0;
1859 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1861 if (error == EEXIST)
1867 * nfs symbolic link create call
1869 * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1870 * struct componentname *a_cnp, struct vattr *a_vap,
1874 nfs_symlink(struct vop_old_symlink_args *ap)
1876 struct vnode *dvp = ap->a_dvp;
1877 struct vattr *vap = ap->a_vap;
1878 struct componentname *cnp = ap->a_cnp;
1879 struct nfsv2_sattr *sp;
1883 caddr_t bpos, dpos, cp2;
1884 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
1885 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1886 struct vnode *newvp = (struct vnode *)0;
1887 int v3 = NFS_ISV3(dvp);
1889 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1890 slen = strlen(ap->a_target);
1891 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED +
1892 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3));
1893 nfsm_fhtom(dvp, v3);
1894 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1896 nfsm_v3attrbuild(vap, FALSE);
1898 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
1900 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1901 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
1902 sp->sa_uid = nfs_xdrneg1;
1903 sp->sa_gid = nfs_xdrneg1;
1904 sp->sa_size = nfs_xdrneg1;
1905 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1906 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1910 * Issue the NFS request and get the rpc response.
1912 * Only NFSv3 responses returning an error of 0 actually return
1913 * a file handle that can be converted into newvp without having
1914 * to do an extra lookup rpc.
1916 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_td, cnp->cn_cred);
1919 nfsm_mtofh(dvp, newvp, v3, gotvp);
1920 nfsm_wcc_data(dvp, wccflag);
1924 * out code jumps -> here, mrep is also freed.
1931 * If we get an EEXIST error, silently convert it to no-error
1932 * in case of an NFS retry.
1934 if (error == EEXIST)
1938 * If we do not have (or no longer have) an error, and we could
1939 * not extract the newvp from the response due to the request being
1940 * NFSv2 or the error being EEXIST. We have to do a lookup in order
1941 * to obtain a newvp to return.
1943 if (error == 0 && newvp == NULL) {
1944 struct nfsnode *np = NULL;
1946 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1947 cnp->cn_cred, cnp->cn_td, &np);
1957 VTONFS(dvp)->n_flag |= NLMODIFIED;
1959 VTONFS(dvp)->n_attrstamp = 0;
1966 * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
1967 * struct componentname *a_cnp, struct vattr *a_vap)
1970 nfs_mkdir(struct vop_old_mkdir_args *ap)
1972 struct vnode *dvp = ap->a_dvp;
1973 struct vattr *vap = ap->a_vap;
1974 struct componentname *cnp = ap->a_cnp;
1975 struct nfsv2_sattr *sp;
1980 struct nfsnode *np = (struct nfsnode *)0;
1981 struct vnode *newvp = (struct vnode *)0;
1982 caddr_t bpos, dpos, cp2;
1983 int error = 0, wccflag = NFSV3_WCCRATTR;
1985 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1987 int v3 = NFS_ISV3(dvp);
1989 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
1992 len = cnp->cn_namelen;
1993 nfsstats.rpccnt[NFSPROC_MKDIR]++;
1994 nfsm_reqhead(dvp, NFSPROC_MKDIR,
1995 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3));
1996 nfsm_fhtom(dvp, v3);
1997 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
1999 nfsm_v3attrbuild(vap, FALSE);
2001 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
2002 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
2003 sp->sa_uid = nfs_xdrneg1;
2004 sp->sa_gid = nfs_xdrneg1;
2005 sp->sa_size = nfs_xdrneg1;
2006 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
2007 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
2009 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_td, cnp->cn_cred);
2011 nfsm_mtofh(dvp, newvp, v3, gotvp);
2013 nfsm_wcc_data(dvp, wccflag);
2016 VTONFS(dvp)->n_flag |= NLMODIFIED;
2018 VTONFS(dvp)->n_attrstamp = 0;
2020 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
2021 * if we can succeed in looking up the directory.
2023 if (error == EEXIST || (!error && !gotvp)) {
2026 newvp = (struct vnode *)0;
2028 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
2032 if (newvp->v_type != VDIR)
2045 * nfs remove directory call
2047 * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
2048 * struct componentname *a_cnp)
2051 nfs_rmdir(struct vop_old_rmdir_args *ap)
2053 struct vnode *vp = ap->a_vp;
2054 struct vnode *dvp = ap->a_dvp;
2055 struct componentname *cnp = ap->a_cnp;
2059 caddr_t bpos, dpos, cp2;
2060 int error = 0, wccflag = NFSV3_WCCRATTR;
2061 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2062 int v3 = NFS_ISV3(dvp);
2066 nfsstats.rpccnt[NFSPROC_RMDIR]++;
2067 nfsm_reqhead(dvp, NFSPROC_RMDIR,
2068 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
2069 nfsm_fhtom(dvp, v3);
2070 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
2071 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_td, cnp->cn_cred);
2073 nfsm_wcc_data(dvp, wccflag);
2076 VTONFS(dvp)->n_flag |= NLMODIFIED;
2078 VTONFS(dvp)->n_attrstamp = 0;
2080 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2082 if (error == ENOENT)
2090 * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
2093 nfs_readdir(struct vop_readdir_args *ap)
2095 struct vnode *vp = ap->a_vp;
2096 struct nfsnode *np = VTONFS(vp);
2097 struct uio *uio = ap->a_uio;
2101 if (vp->v_type != VDIR)
2104 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0)
2108 * If we have a valid EOF offset cache we must call VOP_GETATTR()
2109 * and then check that is still valid, or if this is an NQNFS mount
2110 * we call NQNFS_CKCACHEABLE() instead of VOP_GETATTR(). Note that
2111 * VOP_GETATTR() does not necessarily go to the wire.
2113 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2114 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0) {
2115 if (VOP_GETATTR(vp, &vattr) == 0 &&
2116 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0
2118 nfsstats.direofcache_hits++;
2124 * Call nfs_bioread() to do the real work. nfs_bioread() does its
2125 * own cache coherency checks so we do not have to.
2127 tresid = uio->uio_resid;
2128 error = nfs_bioread(vp, uio, 0);
2130 if (!error && uio->uio_resid == tresid)
2131 nfsstats.direofcache_misses++;
2138 * Readdir rpc call. nfs_bioread->nfs_doio->nfs_readdirrpc.
2140 * Note that for directories, nfs_bioread maintains the underlying nfs-centric
2141 * offset/block and converts the nfs formatted directory entries for userland
2142 * consumption as well as deals with offsets into the middle of blocks.
2143 * nfs_doio only deals with logical blocks. In particular, uio_offset will
2144 * be block-bounded. It must convert to cookies for the actual RPC.
2147 nfs_readdirrpc(struct vnode *vp, struct uio *uiop)
2150 struct nfs_dirent *dp = NULL;
2155 caddr_t bpos, dpos, cp2;
2156 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2158 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2159 struct nfsnode *dnp = VTONFS(vp);
2161 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2163 int v3 = NFS_ISV3(vp);
2166 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2167 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2168 panic("nfs readdirrpc bad uio");
2172 * If there is no cookie, assume directory was stale.
2174 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2178 return (NFSERR_BAD_COOKIE);
2180 * Loop around doing readdir rpc's of size nm_readdirsize
2181 * truncated to a multiple of DIRBLKSIZ.
2182 * The stopping criteria is EOF or buffer full.
2184 while (more_dirs && bigenough) {
2185 nfsstats.rpccnt[NFSPROC_READDIR]++;
2186 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) +
2190 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
2191 *tl++ = cookie.nfsuquad[0];
2192 *tl++ = cookie.nfsuquad[1];
2193 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2194 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2196 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2197 *tl++ = cookie.nfsuquad[0];
2199 *tl = txdr_unsigned(nmp->nm_readdirsize);
2200 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_td, nfs_vpcred(vp, ND_READ));
2202 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
2204 nfsm_dissect(tl, u_int32_t *,
2206 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2207 dnp->n_cookieverf.nfsuquad[1] = *tl;
2213 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2214 more_dirs = fxdr_unsigned(int, *tl);
2216 /* loop thru the dir entries, converting them to std form */
2217 while (more_dirs && bigenough) {
2219 nfsm_dissect(tl, u_int32_t *,
2221 fileno = fxdr_hyper(tl);
2222 len = fxdr_unsigned(int, *(tl + 2));
2224 nfsm_dissect(tl, u_int32_t *,
2226 fileno = fxdr_unsigned(u_quad_t, *tl++);
2227 len = fxdr_unsigned(int, *tl);
2229 if (len <= 0 || len > NFS_MAXNAMLEN) {
2236 * len is the number of bytes in the path element
2237 * name, not including the \0 termination.
2239 * tlen is the number of bytes w have to reserve for
2240 * the path element name.
2242 tlen = nfsm_rndup(len);
2244 tlen += 4; /* To ensure null termination */
2247 * If the entry would cross a DIRBLKSIZ boundary,
2248 * extend the previous nfs_dirent to cover the
2251 left = DIRBLKSIZ - blksiz;
2252 if ((tlen + sizeof(struct nfs_dirent)) > left) {
2253 dp->nfs_reclen += left;
2254 uiop->uio_iov->iov_base += left;
2255 uiop->uio_iov->iov_len -= left;
2256 uiop->uio_offset += left;
2257 uiop->uio_resid -= left;
2260 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid)
2263 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base;
2264 dp->nfs_ino = fileno;
2265 dp->nfs_namlen = len;
2266 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent);
2267 dp->nfs_type = DT_UNKNOWN;
2268 blksiz += dp->nfs_reclen;
2269 if (blksiz == DIRBLKSIZ)
2271 uiop->uio_offset += sizeof(struct nfs_dirent);
2272 uiop->uio_resid -= sizeof(struct nfs_dirent);
2273 uiop->uio_iov->iov_base += sizeof(struct nfs_dirent);
2274 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent);
2275 nfsm_mtouio(uiop, len);
2278 * The uiop has advanced by nfs_dirent + len
2279 * but really needs to advance by
2282 cp = uiop->uio_iov->iov_base;
2284 *cp = '\0'; /* null terminate */
2285 uiop->uio_iov->iov_base += tlen;
2286 uiop->uio_iov->iov_len -= tlen;
2287 uiop->uio_offset += tlen;
2288 uiop->uio_resid -= tlen;
2291 * NFS strings must be rounded up (nfsm_myouio
2292 * handled that in the bigenough case).
2294 nfsm_adv(nfsm_rndup(len));
2297 nfsm_dissect(tl, u_int32_t *,
2300 nfsm_dissect(tl, u_int32_t *,
2305 * If we were able to accomodate the last entry,
2306 * get the cookie for the next one. Otherwise
2307 * hold-over the cookie for the one we were not
2308 * able to accomodate.
2311 cookie.nfsuquad[0] = *tl++;
2313 cookie.nfsuquad[1] = *tl++;
2319 more_dirs = fxdr_unsigned(int, *tl);
2322 * If at end of rpc data, get the eof boolean
2325 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2326 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2331 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2332 * by increasing d_reclen for the last record.
2335 left = DIRBLKSIZ - blksiz;
2336 dp->nfs_reclen += left;
2337 uiop->uio_iov->iov_base += left;
2338 uiop->uio_iov->iov_len -= left;
2339 uiop->uio_offset += left;
2340 uiop->uio_resid -= left;
2345 * We hit the end of the directory, update direofoffset.
2347 dnp->n_direofoffset = uiop->uio_offset;
2350 * There is more to go, insert the link cookie so the
2351 * next block can be read.
2353 if (uiop->uio_resid > 0)
2354 kprintf("EEK! readdirrpc resid > 0\n");
2355 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2363 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2366 nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop)
2369 struct nfs_dirent *dp;
2373 struct vnode *newvp;
2375 caddr_t bpos, dpos, cp2, dpossav1, dpossav2;
2376 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2;
2378 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2379 struct nfsnode *dnp = VTONFS(vp), *np;
2382 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2383 int attrflag, fhsize;
2384 struct nchandle nch;
2385 struct nchandle dnch;
2386 struct nlcomponent nlc;
2392 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2393 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2394 panic("nfs readdirplusrpc bad uio");
2397 * Obtain the namecache record for the directory so we have something
2398 * to use as a basis for creating the entries. This function will
2399 * return a held (but not locked) ncp. The ncp may be disconnected
2400 * from the tree and cannot be used for upward traversals, and the
2401 * ncp may be unnamed. Note that other unrelated operations may
2402 * cause the ncp to be named at any time.
2404 cache_fromdvp(vp, NULL, 0, &dnch);
2405 bzero(&nlc, sizeof(nlc));
2409 * If there is no cookie, assume directory was stale.
2411 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2415 return (NFSERR_BAD_COOKIE);
2417 * Loop around doing readdir rpc's of size nm_readdirsize
2418 * truncated to a multiple of DIRBLKSIZ.
2419 * The stopping criteria is EOF or buffer full.
2421 while (more_dirs && bigenough) {
2422 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
2423 nfsm_reqhead(vp, NFSPROC_READDIRPLUS,
2424 NFSX_FH(1) + 6 * NFSX_UNSIGNED);
2426 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
2427 *tl++ = cookie.nfsuquad[0];
2428 *tl++ = cookie.nfsuquad[1];
2429 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2430 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2431 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2432 *tl = txdr_unsigned(nmp->nm_rsize);
2433 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_td, nfs_vpcred(vp, ND_READ));
2434 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
2439 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2440 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2441 dnp->n_cookieverf.nfsuquad[1] = *tl++;
2442 more_dirs = fxdr_unsigned(int, *tl);
2444 /* loop thru the dir entries, doctoring them to 4bsd form */
2445 while (more_dirs && bigenough) {
2446 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2447 fileno = fxdr_hyper(tl);
2448 len = fxdr_unsigned(int, *(tl + 2));
2449 if (len <= 0 || len > NFS_MAXNAMLEN) {
2454 tlen = nfsm_rndup(len);
2456 tlen += 4; /* To ensure null termination*/
2457 left = DIRBLKSIZ - blksiz;
2458 if ((tlen + sizeof(struct nfs_dirent)) > left) {
2459 dp->nfs_reclen += left;
2460 uiop->uio_iov->iov_base += left;
2461 uiop->uio_iov->iov_len -= left;
2462 uiop->uio_offset += left;
2463 uiop->uio_resid -= left;
2466 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid)
2469 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base;
2470 dp->nfs_ino = fileno;
2471 dp->nfs_namlen = len;
2472 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent);
2473 dp->nfs_type = DT_UNKNOWN;
2474 blksiz += dp->nfs_reclen;
2475 if (blksiz == DIRBLKSIZ)
2477 uiop->uio_offset += sizeof(struct nfs_dirent);
2478 uiop->uio_resid -= sizeof(struct nfs_dirent);
2479 uiop->uio_iov->iov_base += sizeof(struct nfs_dirent);
2480 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent);
2481 nlc.nlc_nameptr = uiop->uio_iov->iov_base;
2482 nlc.nlc_namelen = len;
2483 nfsm_mtouio(uiop, len);
2484 cp = uiop->uio_iov->iov_base;
2487 uiop->uio_iov->iov_base += tlen;
2488 uiop->uio_iov->iov_len -= tlen;
2489 uiop->uio_offset += tlen;
2490 uiop->uio_resid -= tlen;
2492 nfsm_adv(nfsm_rndup(len));
2493 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2495 cookie.nfsuquad[0] = *tl++;
2496 cookie.nfsuquad[1] = *tl++;
2501 * Since the attributes are before the file handle
2502 * (sigh), we must skip over the attributes and then
2503 * come back and get them.
2505 attrflag = fxdr_unsigned(int, *tl);
2509 nfsm_adv(NFSX_V3FATTR);
2510 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2511 doit = fxdr_unsigned(int, *tl);
2513 nfsm_getfh(fhp, fhsize, 1);
2514 if (NFS_CMPFH(dnp, fhp, fhsize)) {
2519 error = nfs_nget(vp->v_mount, fhp,
2527 if (doit && bigenough) {
2532 nfsm_loadattr(newvp, (struct vattr *)0);
2536 IFTODT(VTTOIF(np->n_vattr.va_type));
2538 kprintf("NFS/READDIRPLUS, ENTER %*.*s\n",
2539 nlc.nlc_namelen, nlc.nlc_namelen,
2541 nch = cache_nlookup(&dnch, &nlc);
2542 cache_setunresolved(&nch);
2543 nfs_cache_setvp(&nch, newvp,
2544 nfspos_cache_timeout);
2547 kprintf("NFS/READDIRPLUS, UNABLE TO ENTER"
2549 nlc.nlc_namelen, nlc.nlc_namelen,
2554 /* Just skip over the file handle */
2555 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2556 i = fxdr_unsigned(int, *tl);
2557 nfsm_adv(nfsm_rndup(i));
2559 if (newvp != NULLVP) {
2566 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2567 more_dirs = fxdr_unsigned(int, *tl);
2570 * If at end of rpc data, get the eof boolean
2573 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2574 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2579 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2580 * by increasing d_reclen for the last record.
2583 left = DIRBLKSIZ - blksiz;
2584 dp->nfs_reclen += left;
2585 uiop->uio_iov->iov_base += left;
2586 uiop->uio_iov->iov_len -= left;
2587 uiop->uio_offset += left;
2588 uiop->uio_resid -= left;
2592 * We are now either at the end of the directory or have filled the
2596 dnp->n_direofoffset = uiop->uio_offset;
2598 if (uiop->uio_resid > 0)
2599 kprintf("EEK! readdirplusrpc resid > 0\n");
2600 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2604 if (newvp != NULLVP) {
2617 * Silly rename. To make the NFS filesystem that is stateless look a little
2618 * more like the "ufs" a remove of an active vnode is translated to a rename
2619 * to a funny looking filename that is removed by nfs_inactive on the
2620 * nfsnode. There is the potential for another process on a different client
2621 * to create the same funny name between the nfs_lookitup() fails and the
2622 * nfs_rename() completes, but...
2625 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2627 struct sillyrename *sp;
2632 * We previously purged dvp instead of vp. I don't know why, it
2633 * completely destroys performance. We can't do it anyway with the
2634 * new VFS API since we would be breaking the namecache topology.
2636 cache_purge(vp); /* XXX */
2639 if (vp->v_type == VDIR)
2640 panic("nfs: sillyrename dir");
2642 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2643 M_NFSREQ, M_WAITOK);
2644 sp->s_cred = crdup(cnp->cn_cred);
2648 /* Fudge together a funny name */
2649 sp->s_namlen = ksprintf(sp->s_name, ".nfsA%08x4.4", (int)cnp->cn_td);
2651 /* Try lookitups until we get one that isn't there */
2652 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2653 cnp->cn_td, (struct nfsnode **)0) == 0) {
2655 if (sp->s_name[4] > 'z') {
2660 error = nfs_renameit(dvp, cnp, sp);
2663 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2665 np->n_sillyrename = sp;
2670 kfree((caddr_t)sp, M_NFSREQ);
2675 * Look up a file name and optionally either update the file handle or
2676 * allocate an nfsnode, depending on the value of npp.
2677 * npp == NULL --> just do the lookup
2678 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2680 * *npp != NULL --> update the file handle in the vnode
2683 nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred,
2684 struct thread *td, struct nfsnode **npp)
2689 struct vnode *newvp = (struct vnode *)0;
2690 struct nfsnode *np, *dnp = VTONFS(dvp);
2691 caddr_t bpos, dpos, cp2;
2692 int error = 0, fhlen, attrflag;
2693 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2695 int v3 = NFS_ISV3(dvp);
2697 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
2698 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
2699 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2700 nfsm_fhtom(dvp, v3);
2701 nfsm_strtom(name, len, NFS_MAXNAMLEN);
2702 nfsm_request(dvp, NFSPROC_LOOKUP, td, cred);
2703 if (npp && !error) {
2704 nfsm_getfh(nfhp, fhlen, v3);
2707 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2708 kfree((caddr_t)np->n_fhp, M_NFSBIGFH);
2709 np->n_fhp = &np->n_fh;
2710 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2711 np->n_fhp =(nfsfh_t *)kmalloc(fhlen,M_NFSBIGFH,M_WAITOK);
2712 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2713 np->n_fhsize = fhlen;
2715 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
2719 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
2727 nfsm_postop_attr(newvp, attrflag, NFS_LATTR_NOSHRINK);
2728 if (!attrflag && *npp == NULL) {
2737 nfsm_loadattr(newvp, (struct vattr *)0);
2741 if (npp && *npp == NULL) {
2756 * Nfs Version 3 commit rpc
2759 nfs_commit(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td)
2764 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2765 caddr_t bpos, dpos, cp2;
2766 int error = 0, wccflag = NFSV3_WCCRATTR;
2767 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2769 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
2771 nfsstats.rpccnt[NFSPROC_COMMIT]++;
2772 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1));
2774 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2775 txdr_hyper(offset, tl);
2777 *tl = txdr_unsigned(cnt);
2778 nfsm_request(vp, NFSPROC_COMMIT, td, nfs_vpcred(vp, ND_WRITE));
2779 nfsm_wcc_data(vp, wccflag);
2781 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF);
2782 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
2783 NFSX_V3WRITEVERF)) {
2784 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
2786 error = NFSERR_STALEWRITEVERF;
2796 * - make nfs_bmap() essentially a no-op that does no translation
2797 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
2798 * (Maybe I could use the process's page mapping, but I was concerned that
2799 * Kernel Write might not be enabled and also figured copyout() would do
2800 * a lot more work than bcopy() and also it currently happens in the
2801 * context of the swapper process (2).
2803 * nfs_bmap(struct vnode *a_vp, off_t a_loffset, struct vnode **a_vpp,
2804 * off_t *a_doffsetp, int *a_runp, int *a_runb)
2807 nfs_bmap(struct vop_bmap_args *ap)
2809 struct vnode *vp = ap->a_vp;
2811 if (ap->a_vpp != NULL)
2813 if (ap->a_doffsetp != NULL)
2814 *ap->a_doffsetp = ap->a_loffset;
2815 if (ap->a_runp != NULL)
2817 if (ap->a_runb != NULL)
2825 * For async requests when nfsiod(s) are running, queue the request by
2826 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the
2830 nfs_strategy(struct vop_strategy_args *ap)
2832 struct bio *bio = ap->a_bio;
2834 struct buf *bp = bio->bio_buf;
2838 KASSERT(bp->b_cmd != BUF_CMD_DONE,
2839 ("nfs_strategy: buffer %p unexpectedly marked done", bp));
2840 KASSERT(BUF_REFCNT(bp) > 0,
2841 ("nfs_strategy: buffer %p not locked", bp));
2843 if (bp->b_flags & B_ASYNC)
2846 td = curthread; /* XXX */
2849 * We probably don't need to push an nbio any more since no
2850 * block conversion is required due to the use of 64 bit byte
2851 * offsets, but do it anyway.
2853 nbio = push_bio(bio);
2854 nbio->bio_offset = bio->bio_offset;
2857 * If the op is asynchronous and an i/o daemon is waiting
2858 * queue the request, wake it up and wait for completion
2859 * otherwise just do it ourselves.
2861 if ((bp->b_flags & B_ASYNC) == 0 || nfs_asyncio(ap->a_vp, nbio, td))
2862 error = nfs_doio(ap->a_vp, nbio, td);
2869 * NB Currently unsupported.
2871 * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred,
2872 * struct thread *a_td)
2876 nfs_mmap(struct vop_mmap_args *ap)
2882 * fsync vnode op. Just call nfs_flush() with commit == 1.
2884 * nfs_fsync(struct vnode *a_vp, struct ucred * a_cred, int a_waitfor,
2885 * struct thread *a_td)
2889 nfs_fsync(struct vop_fsync_args *ap)
2891 return (nfs_flush(ap->a_vp, ap->a_waitfor, curthread, 1));
2895 * Flush all the blocks associated with a vnode. Dirty NFS buffers may be
2896 * in one of two states: If B_NEEDCOMMIT is clear then the buffer contains
2897 * new NFS data which needs to be written to the server. If B_NEEDCOMMIT is
2898 * set the buffer contains data that has already been written to the server
2899 * and which now needs a commit RPC.
2901 * If commit is 0 we only take one pass and only flush buffers containing new
2904 * If commit is 1 we take two passes, issuing a commit RPC in the second
2907 * If waitfor is MNT_WAIT and commit is 1, we loop as many times as required
2908 * to completely flush all pending data.
2910 * Note that the RB_SCAN code properly handles the case where the
2911 * callback might block and directly or indirectly (another thread) cause
2912 * the RB tree to change.
2915 #ifndef NFS_COMMITBVECSIZ
2916 #define NFS_COMMITBVECSIZ 16
2919 struct nfs_flush_info {
2920 enum { NFI_FLUSHNEW, NFI_COMMIT } mode;
2927 struct buf *bvary[NFS_COMMITBVECSIZ];
2933 static int nfs_flush_bp(struct buf *bp, void *data);
2934 static int nfs_flush_docommit(struct nfs_flush_info *info, int error);
2937 nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit)
2939 struct nfsnode *np = VTONFS(vp);
2940 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2941 struct nfs_flush_info info;
2944 bzero(&info, sizeof(info));
2947 info.waitfor = waitfor;
2948 info.slpflag = (nmp->nm_flag & NFSMNT_INT) ? PCATCH : 0;
2955 info.mode = NFI_FLUSHNEW;
2956 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
2957 nfs_flush_bp, &info);
2960 * Take a second pass if committing and no error occured.
2961 * Clean up any left over collection (whether an error
2964 if (commit && error == 0) {
2965 info.mode = NFI_COMMIT;
2966 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
2967 nfs_flush_bp, &info);
2969 error = nfs_flush_docommit(&info, error);
2973 * Wait for pending I/O to complete before checking whether
2974 * any further dirty buffers exist.
2976 while (waitfor == MNT_WAIT && vp->v_track_write.bk_active) {
2977 vp->v_track_write.bk_waitflag = 1;
2978 error = tsleep(&vp->v_track_write,
2979 info.slpflag, "nfsfsync", info.slptimeo);
2982 * We have to be able to break out if this
2983 * is an 'intr' mount.
2985 if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) {
2991 * Since we do not process pending signals,
2992 * once we get a PCATCH our tsleep() will no
2993 * longer sleep, switch to a fixed timeout
2996 if (info.slpflag == PCATCH) {
2998 info.slptimeo = 2 * hz;
3005 * Loop if we are flushing synchronous as well as committing,
3006 * and dirty buffers are still present. Otherwise we might livelock.
3008 } while (waitfor == MNT_WAIT && commit &&
3009 error == 0 && !RB_EMPTY(&vp->v_rbdirty_tree));
3012 * The callbacks have to return a negative error to terminate the
3019 * Deal with any error collection
3021 if (np->n_flag & NWRITEERR) {
3022 error = np->n_error;
3023 np->n_flag &= ~NWRITEERR;
3031 nfs_flush_bp(struct buf *bp, void *data)
3033 struct nfs_flush_info *info = data;
3038 switch(info->mode) {
3041 if (info->loops && info->waitfor == MNT_WAIT) {
3042 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT);
3044 int lkflags = LK_EXCLUSIVE | LK_SLEEPFAIL;
3045 if (info->slpflag & PCATCH)
3046 lkflags |= LK_PCATCH;
3047 error = BUF_TIMELOCK(bp, lkflags, "nfsfsync",
3051 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT);
3054 KKASSERT(bp->b_vp == info->vp);
3056 if ((bp->b_flags & B_DELWRI) == 0)
3057 panic("nfs_fsync: not dirty");
3058 if (bp->b_flags & B_NEEDCOMMIT) {
3065 bp->b_flags |= B_ASYNC;
3075 * Only process buffers in need of a commit which we can
3076 * immediately lock. This may prevent a buffer from being
3077 * committed, but the normal flush loop will block on the
3078 * same buffer so we shouldn't get into an endless loop.
3081 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
3082 (B_DELWRI | B_NEEDCOMMIT) ||
3083 BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT) != 0) {
3088 KKASSERT(bp->b_vp == info->vp);
3092 * NOTE: storing the bp in the bvary[] basically sets
3093 * it up for a commit operation.
3095 * We must call vfs_busy_pages() now so the commit operation
3096 * is interlocked with user modifications to memory mapped
3099 * Note: to avoid loopback deadlocks, we do not
3100 * assign b_runningbufspace.
3102 bp->b_cmd = BUF_CMD_WRITE;
3103 vfs_busy_pages(bp->b_vp, bp);
3104 info->bvary[info->bvsize] = bp;
3105 toff = bp->b_bio2.bio_offset + bp->b_dirtyoff;
3106 if (info->bvsize == 0 || toff < info->beg_off)
3107 info->beg_off = toff;
3108 toff += (off_t)(bp->b_dirtyend - bp->b_dirtyoff);
3109 if (info->bvsize == 0 || toff > info->end_off)
3110 info->end_off = toff;
3112 if (info->bvsize == NFS_COMMITBVECSIZ) {
3113 error = nfs_flush_docommit(info, 0);
3114 KKASSERT(info->bvsize == 0);
3123 nfs_flush_docommit(struct nfs_flush_info *info, int error)
3133 if (info->bvsize > 0) {
3135 * Commit data on the server, as required. Note that
3136 * nfs_commit will use the vnode's cred for the commit.
3137 * The NFSv3 commit RPC is limited to a 32 bit byte count.
3139 bytes = info->end_off - info->beg_off;
3140 if (bytes > 0x40000000)
3145 retv = nfs_commit(vp, info->beg_off,
3146 (int)bytes, info->td);
3147 if (retv == NFSERR_STALEWRITEVERF)
3148 nfs_clearcommit(vp->v_mount);
3152 * Now, either mark the blocks I/O done or mark the
3153 * blocks dirty, depending on whether the commit
3156 for (i = 0; i < info->bvsize; ++i) {
3157 bp = info->bvary[i];
3158 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
3161 * Error, leave B_DELWRI intact
3163 vfs_unbusy_pages(bp);
3164 bp->b_cmd = BUF_CMD_DONE;
3168 * Success, remove B_DELWRI ( bundirty() ).
3170 * b_dirtyoff/b_dirtyend seem to be NFS
3171 * specific. We should probably move that
3172 * into bundirty(). XXX
3174 * We are faking an I/O write, we have to
3175 * start the transaction in order to
3176 * immediately biodone() it.
3179 bp->b_flags |= B_ASYNC;
3181 bp->b_flags &= ~B_ERROR;
3182 bp->b_dirtyoff = bp->b_dirtyend = 0;
3184 biodone(&bp->b_bio1);
3193 * NFS advisory byte-level locks.
3194 * Currently unsupported.
3196 * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl,
3200 nfs_advlock(struct vop_advlock_args *ap)
3202 struct nfsnode *np = VTONFS(ap->a_vp);
3205 * The following kludge is to allow diskless support to work
3206 * until a real NFS lockd is implemented. Basically, just pretend
3207 * that this is a local lock.
3209 return (lf_advlock(ap, &(np->n_lockf), np->n_size));
3213 * Print out the contents of an nfsnode.
3215 * nfs_print(struct vnode *a_vp)
3218 nfs_print(struct vop_print_args *ap)
3220 struct vnode *vp = ap->a_vp;
3221 struct nfsnode *np = VTONFS(vp);
3223 kprintf("tag VT_NFS, fileid %ld fsid 0x%x",
3224 np->n_vattr.va_fileid, np->n_vattr.va_fsid);
3225 if (vp->v_type == VFIFO)
3232 * nfs special file access vnode op.
3233 * Essentially just get vattr and then imitate iaccess() since the device is
3234 * local to the client.
3236 * nfsspec_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
3237 * struct thread *a_td)
3240 nfsspec_access(struct vop_access_args *ap)
3244 struct ucred *cred = ap->a_cred;
3245 struct vnode *vp = ap->a_vp;
3246 mode_t mode = ap->a_mode;
3252 * Disallow write attempts on filesystems mounted read-only;
3253 * unless the file is a socket, fifo, or a block or character
3254 * device resident on the filesystem.
3256 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3257 switch (vp->v_type) {
3267 * If you're the super-user,
3268 * you always get access.
3270 if (cred->cr_uid == 0)
3273 error = VOP_GETATTR(vp, vap);
3277 * Access check is based on only one of owner, group, public.
3278 * If not owner, then check group. If not a member of the
3279 * group, then check public access.
3281 if (cred->cr_uid != vap->va_uid) {
3283 gp = cred->cr_groups;
3284 for (i = 0; i < cred->cr_ngroups; i++, gp++)
3285 if (vap->va_gid == *gp)
3291 error = (vap->va_mode & mode) == mode ? 0 : EACCES;
3296 * Read wrapper for special devices.
3298 * nfsspec_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3299 * struct ucred *a_cred)
3302 nfsspec_read(struct vop_read_args *ap)
3304 struct nfsnode *np = VTONFS(ap->a_vp);
3310 getnanotime(&np->n_atim);
3311 return (VOCALL(&spec_vnode_vops, &ap->a_head));
3315 * Write wrapper for special devices.
3317 * nfsspec_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3318 * struct ucred *a_cred)
3321 nfsspec_write(struct vop_write_args *ap)
3323 struct nfsnode *np = VTONFS(ap->a_vp);
3329 getnanotime(&np->n_mtim);
3330 return (VOCALL(&spec_vnode_vops, &ap->a_head));
3334 * Close wrapper for special devices.
3336 * Update the times on the nfsnode then do device close.
3338 * nfsspec_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
3339 * struct thread *a_td)
3342 nfsspec_close(struct vop_close_args *ap)
3344 struct vnode *vp = ap->a_vp;
3345 struct nfsnode *np = VTONFS(vp);
3348 if (np->n_flag & (NACC | NUPD)) {
3350 if (vp->v_sysref.refcnt == 1 &&
3351 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3353 if (np->n_flag & NACC)
3354 vattr.va_atime = np->n_atim;
3355 if (np->n_flag & NUPD)
3356 vattr.va_mtime = np->n_mtim;
3357 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE));
3360 return (VOCALL(&spec_vnode_vops, &ap->a_head));
3364 * Read wrapper for fifos.
3366 * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3367 * struct ucred *a_cred)
3370 nfsfifo_read(struct vop_read_args *ap)
3372 struct nfsnode *np = VTONFS(ap->a_vp);
3378 getnanotime(&np->n_atim);
3379 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
3383 * Write wrapper for fifos.
3385 * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3386 * struct ucred *a_cred)
3389 nfsfifo_write(struct vop_write_args *ap)
3391 struct nfsnode *np = VTONFS(ap->a_vp);
3397 getnanotime(&np->n_mtim);
3398 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
3402 * Close wrapper for fifos.
3404 * Update the times on the nfsnode then do fifo close.
3406 * nfsfifo_close(struct vnode *a_vp, int a_fflag, struct thread *a_td)
3409 nfsfifo_close(struct vop_close_args *ap)
3411 struct vnode *vp = ap->a_vp;
3412 struct nfsnode *np = VTONFS(vp);
3416 if (np->n_flag & (NACC | NUPD)) {
3418 if (np->n_flag & NACC)
3420 if (np->n_flag & NUPD)
3423 if (vp->v_sysref.refcnt == 1 &&
3424 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3426 if (np->n_flag & NACC)
3427 vattr.va_atime = np->n_atim;
3428 if (np->n_flag & NUPD)
3429 vattr.va_mtime = np->n_mtim;
3430 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE));
3433 return (VOCALL(&fifo_vnode_vops, &ap->a_head));