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 1.80 2008/10/18 01:13:54 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 nfs_flush_on_rename = 1;
230 SYSCTL_INT(_vfs_nfs, OID_AUTO, flush_on_rename, CTLFLAG_RW,
231 &nfs_flush_on_rename, 0, "flush fvp prior to rename");
232 static int nfs_flush_on_hlink = 0;
233 SYSCTL_INT(_vfs_nfs, OID_AUTO, flush_on_hlink, CTLFLAG_RW,
234 &nfs_flush_on_hlink, 0, "flush fvp prior to hard link");
236 static int nfsaccess_cache_timeout = NFS_DEFATTRTIMO;
237 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
238 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
240 static int nfsneg_cache_timeout = NFS_MINATTRTIMO;
241 SYSCTL_INT(_vfs_nfs, OID_AUTO, neg_cache_timeout, CTLFLAG_RW,
242 &nfsneg_cache_timeout, 0, "NFS NEGATIVE NAMECACHE timeout");
244 static int nfspos_cache_timeout = NFS_MINATTRTIMO;
245 SYSCTL_INT(_vfs_nfs, OID_AUTO, pos_cache_timeout, CTLFLAG_RW,
246 &nfspos_cache_timeout, 0, "NFS POSITIVE NAMECACHE timeout");
248 static int nfsv3_commit_on_close = 0;
249 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
250 &nfsv3_commit_on_close, 0, "write+commit on close, else only write");
252 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
253 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
255 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
256 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
259 #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \
260 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \
261 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP)
263 nfs3_access_otw(struct vnode *vp, int wmode,
264 struct thread *td, struct ucred *cred)
268 int error = 0, attrflag;
270 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
271 caddr_t bpos, dpos, cp2;
275 struct nfsnode *np = VTONFS(vp);
277 nfsstats.rpccnt[NFSPROC_ACCESS]++;
278 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED);
280 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
281 *tl = txdr_unsigned(wmode);
282 nfsm_request(vp, NFSPROC_ACCESS, td, cred);
283 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
285 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
286 rmode = fxdr_unsigned(u_int32_t, *tl);
288 np->n_modeuid = cred->cr_uid;
289 np->n_modestamp = mycpu->gd_time_seconds;
297 * nfs access vnode op.
298 * For nfs version 2, just return ok. File accesses may fail later.
299 * For nfs version 3, use the access rpc to check accessibility. If file modes
300 * are changed on the server, accesses might still fail later.
302 * nfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
305 nfs_access(struct vop_access_args *ap)
307 struct vnode *vp = ap->a_vp;
308 thread_t td = curthread;
310 u_int32_t mode, wmode;
311 int v3 = NFS_ISV3(vp);
312 struct nfsnode *np = VTONFS(vp);
315 * Disallow write attempts on filesystems mounted read-only;
316 * unless the file is a socket, fifo, or a block or character
317 * device resident on the filesystem.
319 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
320 switch (vp->v_type) {
330 * For nfs v3, check to see if we have done this recently, and if
331 * so return our cached result instead of making an ACCESS call.
332 * If not, do an access rpc, otherwise you are stuck emulating
333 * ufs_access() locally using the vattr. This may not be correct,
334 * since the server may apply other access criteria such as
335 * client uid-->server uid mapping that we do not know about.
338 if (ap->a_mode & VREAD)
339 mode = NFSV3ACCESS_READ;
342 if (vp->v_type != VDIR) {
343 if (ap->a_mode & VWRITE)
344 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
345 if (ap->a_mode & VEXEC)
346 mode |= NFSV3ACCESS_EXECUTE;
348 if (ap->a_mode & VWRITE)
349 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
351 if (ap->a_mode & VEXEC)
352 mode |= NFSV3ACCESS_LOOKUP;
354 /* XXX safety belt, only make blanket request if caching */
355 if (nfsaccess_cache_timeout > 0) {
356 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY |
357 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE |
358 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP;
364 * Does our cached result allow us to give a definite yes to
367 if (np->n_modestamp &&
368 (mycpu->gd_time_seconds < (np->n_modestamp + nfsaccess_cache_timeout)) &&
369 (ap->a_cred->cr_uid == np->n_modeuid) &&
370 ((np->n_mode & mode) == mode)) {
371 nfsstats.accesscache_hits++;
374 * Either a no, or a don't know. Go to the wire.
376 nfsstats.accesscache_misses++;
377 error = nfs3_access_otw(vp, wmode, td, ap->a_cred);
379 if ((np->n_mode & mode) != mode) {
385 if ((error = nfsspec_access(ap)) != 0)
389 * Attempt to prevent a mapped root from accessing a file
390 * which it shouldn't. We try to read a byte from the file
391 * if the user is root and the file is not zero length.
392 * After calling nfsspec_access, we should have the correct
395 if (ap->a_cred->cr_uid == 0 && (ap->a_mode & VREAD)
396 && VTONFS(vp)->n_size > 0) {
403 auio.uio_iov = &aiov;
407 auio.uio_segflg = UIO_SYSSPACE;
408 auio.uio_rw = UIO_READ;
411 if (vp->v_type == VREG) {
412 error = nfs_readrpc(vp, &auio);
413 } else if (vp->v_type == VDIR) {
415 bp = kmalloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
417 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
418 error = nfs_readdirrpc(vp, &auio);
420 } else if (vp->v_type == VLNK) {
421 error = nfs_readlinkrpc(vp, &auio);
428 * [re]record creds for reading and/or writing if access
429 * was granted. Assume the NFS server will grant read access
430 * for execute requests.
433 if ((ap->a_mode & (VREAD|VEXEC)) && ap->a_cred != np->n_rucred) {
436 crfree(np->n_rucred);
437 np->n_rucred = ap->a_cred;
439 if ((ap->a_mode & VWRITE) && ap->a_cred != np->n_wucred) {
442 crfree(np->n_wucred);
443 np->n_wucred = ap->a_cred;
451 * Check to see if the type is ok
452 * and that deletion is not in progress.
453 * For paged in text files, you will need to flush the page cache
454 * if consistency is lost.
456 * nfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
461 nfs_open(struct vop_open_args *ap)
463 struct vnode *vp = ap->a_vp;
464 struct nfsnode *np = VTONFS(vp);
468 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
470 kprintf("open eacces vtyp=%d\n",vp->v_type);
476 * Clear the attribute cache only if opening with write access. It
477 * is unclear if we should do this at all here, but we certainly
478 * should not clear the cache unconditionally simply because a file
481 if (ap->a_mode & FWRITE)
485 * For normal NFS, reconcile changes made locally verses
486 * changes made remotely. Note that VOP_GETATTR only goes
487 * to the wire if the cached attribute has timed out or been
490 * If local modifications have been made clear the attribute
491 * cache to force an attribute and modified time check. If
492 * GETATTR detects that the file has been changed by someone
493 * other then us it will set NRMODIFIED.
495 * If we are opening a directory and local changes have been
496 * made we have to invalidate the cache in order to ensure
497 * that we get the most up-to-date information from the
500 if (np->n_flag & NLMODIFIED) {
502 if (vp->v_type == VDIR) {
503 error = nfs_vinvalbuf(vp, V_SAVE, 1);
509 error = VOP_GETATTR(vp, &vattr);
512 if (np->n_flag & NRMODIFIED) {
513 if (vp->v_type == VDIR)
515 error = nfs_vinvalbuf(vp, V_SAVE, 1);
518 np->n_flag &= ~NRMODIFIED;
521 return (vop_stdopen(ap));
526 * What an NFS client should do upon close after writing is a debatable issue.
527 * Most NFS clients push delayed writes to the server upon close, basically for
529 * 1 - So that any write errors may be reported back to the client process
530 * doing the close system call. By far the two most likely errors are
531 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
532 * 2 - To put a worst case upper bound on cache inconsistency between
533 * multiple clients for the file.
534 * There is also a consistency problem for Version 2 of the protocol w.r.t.
535 * not being able to tell if other clients are writing a file concurrently,
536 * since there is no way of knowing if the changed modify time in the reply
537 * is only due to the write for this client.
538 * (NFS Version 3 provides weak cache consistency data in the reply that
539 * should be sufficient to detect and handle this case.)
541 * The current code does the following:
542 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
543 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
544 * or commit them (this satisfies 1 and 2 except for the
545 * case where the server crashes after this close but
546 * before the commit RPC, which is felt to be "good
547 * enough". Changing the last argument to nfs_flush() to
548 * a 1 would force a commit operation, if it is felt a
549 * commit is necessary now.
550 * for NQNFS - do nothing now, since 2 is dealt with via leases and
551 * 1 should be dealt with via an fsync() system call for
552 * cases where write errors are important.
554 * nfs_close(struct vnode *a_vp, int a_fflag)
558 nfs_close(struct vop_close_args *ap)
560 struct vnode *vp = ap->a_vp;
561 struct nfsnode *np = VTONFS(vp);
563 thread_t td = curthread;
565 if (vp->v_type == VREG) {
566 if (np->n_flag & NLMODIFIED) {
569 * Under NFSv3 we have dirty buffers to dispose of. We
570 * must flush them to the NFS server. We have the option
571 * of waiting all the way through the commit rpc or just
572 * waiting for the initial write. The default is to only
573 * wait through the initial write so the data is in the
574 * server's cache, which is roughly similar to the state
575 * a standard disk subsystem leaves the file in on close().
577 * We cannot clear the NLMODIFIED bit in np->n_flag due to
578 * potential races with other processes, and certainly
579 * cannot clear it if we don't commit.
581 int cm = nfsv3_commit_on_close ? 1 : 0;
582 error = nfs_flush(vp, MNT_WAIT, td, cm);
583 /* np->n_flag &= ~NLMODIFIED; */
585 error = nfs_vinvalbuf(vp, V_SAVE, 1);
589 if (np->n_flag & NWRITEERR) {
590 np->n_flag &= ~NWRITEERR;
599 * nfs getattr call from vfs.
601 * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap)
604 nfs_getattr(struct vop_getattr_args *ap)
606 struct vnode *vp = ap->a_vp;
607 struct nfsnode *np = VTONFS(vp);
613 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
614 int v3 = NFS_ISV3(vp);
615 thread_t td = curthread;
618 * Update local times for special files.
620 if (np->n_flag & (NACC | NUPD))
623 * First look in the cache.
625 if (nfs_getattrcache(vp, ap->a_vap) == 0)
628 if (v3 && nfsaccess_cache_timeout > 0) {
629 nfsstats.accesscache_misses++;
630 nfs3_access_otw(vp, NFSV3ACCESS_ALL, td, nfs_vpcred(vp, ND_CHECK));
631 if (nfs_getattrcache(vp, ap->a_vap) == 0)
635 nfsstats.rpccnt[NFSPROC_GETATTR]++;
636 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3));
638 nfsm_request(vp, NFSPROC_GETATTR, td, nfs_vpcred(vp, ND_CHECK));
640 nfsm_loadattr(vp, ap->a_vap);
650 * nfs_setattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred)
653 nfs_setattr(struct vop_setattr_args *ap)
655 struct vnode *vp = ap->a_vp;
656 struct nfsnode *np = VTONFS(vp);
657 struct vattr *vap = ap->a_vap;
660 thread_t td = curthread;
667 * Setting of flags is not supported.
669 if (vap->va_flags != VNOVAL)
673 * Disallow write attempts if the filesystem is mounted read-only.
675 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
676 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
677 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
678 (vp->v_mount->mnt_flag & MNT_RDONLY))
681 if (vap->va_size != VNOVAL) {
683 * truncation requested
685 switch (vp->v_type) {
692 if (vap->va_mtime.tv_sec == VNOVAL &&
693 vap->va_atime.tv_sec == VNOVAL &&
694 vap->va_mode == (mode_t)VNOVAL &&
695 vap->va_uid == (uid_t)VNOVAL &&
696 vap->va_gid == (gid_t)VNOVAL)
698 vap->va_size = VNOVAL;
702 * Disallow write attempts if the filesystem is
705 if (vp->v_mount->mnt_flag & MNT_RDONLY)
709 * This is nasty. The RPCs we send to flush pending
710 * data often return attribute information which is
711 * cached via a callback to nfs_loadattrcache(), which
712 * has the effect of changing our notion of the file
713 * size. Due to flushed appends and other operations
714 * the file size can be set to virtually anything,
715 * including values that do not match either the old
716 * or intended file size.
718 * When this condition is detected we must loop to
719 * try the operation again. Hopefully no more
720 * flushing is required on the loop so it works the
721 * second time around. THIS CASE ALMOST ALWAYS
726 error = nfs_meta_setsize(vp, td, vap->va_size);
728 if (np->n_flag & NLMODIFIED) {
729 if (vap->va_size == 0)
730 error = nfs_vinvalbuf(vp, 0, 1);
732 error = nfs_vinvalbuf(vp, V_SAVE, 1);
735 * note: this loop case almost always happens at
736 * least once per truncation.
738 if (error == 0 && np->n_size != vap->va_size)
740 np->n_vattr.va_size = vap->va_size;
743 } else if ((np->n_flag & NLMODIFIED) && vp->v_type == VREG) {
745 * What to do. If we are modifying the mtime we lose
746 * mtime detection of changes made by the server or other
747 * clients. But programs like rsync/rdist/cpdup are going
748 * to call utimes a lot. We don't want to piecemeal sync.
750 * For now sync if any prior remote changes were detected,
751 * but allow us to lose track of remote changes made during
752 * the utimes operation.
754 if (np->n_flag & NRMODIFIED)
755 error = nfs_vinvalbuf(vp, V_SAVE, 1);
759 if (vap->va_mtime.tv_sec != VNOVAL) {
760 np->n_mtime = vap->va_mtime.tv_sec;
764 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
767 * Sanity check if a truncation was issued. This should only occur
768 * if multiple processes are racing on the same file.
770 if (error == 0 && vap->va_size != VNOVAL &&
771 np->n_size != vap->va_size) {
772 kprintf("NFS ftruncate: server disagrees on the file size: %lld/%lld/%lld\n", tsize, vap->va_size, np->n_size);
775 if (error && vap->va_size != VNOVAL) {
776 np->n_size = np->n_vattr.va_size = tsize;
777 vnode_pager_setsize(vp, np->n_size);
783 * Do an nfs setattr rpc.
786 nfs_setattrrpc(struct vnode *vp, struct vattr *vap,
787 struct ucred *cred, struct thread *td)
789 struct nfsv2_sattr *sp;
790 struct nfsnode *np = VTONFS(vp);
793 caddr_t bpos, dpos, cp2;
795 int error = 0, wccflag = NFSV3_WCCRATTR;
796 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
797 int v3 = NFS_ISV3(vp);
799 nfsstats.rpccnt[NFSPROC_SETATTR]++;
800 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3));
803 nfsm_v3attrbuild(vap, TRUE);
804 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
807 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
808 if (vap->va_mode == (mode_t)VNOVAL)
809 sp->sa_mode = nfs_xdrneg1;
811 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
812 if (vap->va_uid == (uid_t)VNOVAL)
813 sp->sa_uid = nfs_xdrneg1;
815 sp->sa_uid = txdr_unsigned(vap->va_uid);
816 if (vap->va_gid == (gid_t)VNOVAL)
817 sp->sa_gid = nfs_xdrneg1;
819 sp->sa_gid = txdr_unsigned(vap->va_gid);
820 sp->sa_size = txdr_unsigned(vap->va_size);
821 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
822 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
824 nfsm_request(vp, NFSPROC_SETATTR, td, cred);
827 nfsm_wcc_data(vp, wccflag);
829 nfsm_loadattr(vp, NULL);
837 nfs_cache_setvp(struct nchandle *nch, struct vnode *vp, int nctimeout)
843 cache_setvp(nch, vp);
844 cache_settimeout(nch, nctimeout);
848 * NEW API CALL - replaces nfs_lookup(). However, we cannot remove
849 * nfs_lookup() until all remaining new api calls are implemented.
851 * Resolve a namecache entry. This function is passed a locked ncp and
852 * must call nfs_cache_setvp() on it as appropriate to resolve the entry.
855 nfs_nresolve(struct vop_nresolve_args *ap)
857 struct thread *td = curthread;
858 struct namecache *ncp;
869 /******NFSM MACROS********/
870 struct mbuf *mb, *mrep, *mreq, *mb2, *md;
871 caddr_t bpos, dpos, cp, cp2;
878 if ((error = vget(dvp, LK_SHARED)) != 0)
883 nfsstats.lookupcache_misses++;
884 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
885 ncp = ap->a_nch->ncp;
887 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
888 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
890 nfsm_strtom(ncp->nc_name, len, NFS_MAXNAMLEN);
891 nfsm_request(dvp, NFSPROC_LOOKUP, td, ap->a_cred);
894 * Cache negatve lookups to reduce NFS traffic, but use
895 * a fast timeout. Otherwise use a timeout of 1 tick.
896 * XXX we should add a namecache flag for no-caching
897 * to uncache the negative hit as soon as possible, but
898 * we cannot simply destroy the entry because it is used
899 * as a placeholder by the caller.
902 nfs_cache_setvp(ap->a_nch, NULL, nfsneg_cache_timeout);
903 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
909 * Success, get the file handle, do various checks, and load
910 * post-operation data from the reply packet. Theoretically
911 * we should never be looking up "." so, theoretically, we
912 * should never get the same file handle as our directory. But
913 * we check anyway. XXX
915 * Note that no timeout is set for the positive cache hit. We
916 * assume, theoretically, that ESTALE returns will be dealt with
917 * properly to handle NFS races and in anycase we cannot depend
918 * on a timeout to deal with NFS open/create/excl issues so instead
919 * of a bad hack here the rest of the NFS client code needs to do
922 nfsm_getfh(fhp, fhsize, v3);
925 if (NFS_CMPFH(np, fhp, fhsize)) {
929 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
938 nfsm_postop_attr(nvp, attrflag, NFS_LATTR_NOSHRINK);
939 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
941 nfsm_loadattr(nvp, NULL);
943 nfs_cache_setvp(ap->a_nch, nvp, nfspos_cache_timeout);
957 * 'cached' nfs directory lookup
959 * NOTE: cannot be removed until NFS implements all the new n*() API calls.
961 * nfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
962 * struct componentname *a_cnp)
965 nfs_lookup(struct vop_old_lookup_args *ap)
967 struct componentname *cnp = ap->a_cnp;
968 struct vnode *dvp = ap->a_dvp;
969 struct vnode **vpp = ap->a_vpp;
970 int flags = cnp->cn_flags;
975 struct nfsmount *nmp;
976 caddr_t bpos, dpos, cp2;
977 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
981 int lockparent, wantparent, error = 0, attrflag, fhsize;
982 int v3 = NFS_ISV3(dvp);
985 * Read-only mount check and directory check.
988 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) &&
989 (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME))
992 if (dvp->v_type != VDIR)
996 * Look it up in the cache. Note that ENOENT is only returned if we
997 * previously entered a negative hit (see later on). The additional
998 * nfsneg_cache_timeout check causes previously cached results to
999 * be instantly ignored if the negative caching is turned off.
1001 lockparent = flags & CNP_LOCKPARENT;
1002 wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT);
1003 nmp = VFSTONFS(dvp->v_mount);
1011 nfsstats.lookupcache_misses++;
1012 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
1013 len = cnp->cn_namelen;
1014 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
1015 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
1016 nfsm_fhtom(dvp, v3);
1017 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
1018 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_td, cnp->cn_cred);
1020 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
1024 nfsm_getfh(fhp, fhsize, v3);
1027 * Handle RENAME case...
1029 if (cnp->cn_nameiop == NAMEI_RENAME && wantparent) {
1030 if (NFS_CMPFH(np, fhp, fhsize)) {
1034 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1041 nfsm_postop_attr(newvp, attrflag, NFS_LATTR_NOSHRINK);
1042 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
1044 nfsm_loadattr(newvp, NULL);
1049 cnp->cn_flags |= CNP_PDIRUNLOCK;
1054 if (flags & CNP_ISDOTDOT) {
1056 cnp->cn_flags |= CNP_PDIRUNLOCK;
1057 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1059 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
1060 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
1061 return (error); /* NOTE: return error from nget */
1065 error = vn_lock(dvp, LK_EXCLUSIVE);
1070 cnp->cn_flags |= CNP_PDIRUNLOCK;
1072 } else if (NFS_CMPFH(np, fhp, fhsize)) {
1076 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1083 cnp->cn_flags |= CNP_PDIRUNLOCK;
1088 nfsm_postop_attr(newvp, attrflag, NFS_LATTR_NOSHRINK);
1089 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
1091 nfsm_loadattr(newvp, NULL);
1093 /* XXX MOVE TO nfs_nremove() */
1094 if ((cnp->cn_flags & CNP_MAKEENTRY) &&
1095 cnp->cn_nameiop != NAMEI_DELETE) {
1096 np->n_ctime = np->n_vattr.va_ctime.tv_sec; /* XXX */
1103 if (newvp != NULLVP) {
1107 if ((cnp->cn_nameiop == NAMEI_CREATE ||
1108 cnp->cn_nameiop == NAMEI_RENAME) &&
1112 cnp->cn_flags |= CNP_PDIRUNLOCK;
1114 if (dvp->v_mount->mnt_flag & MNT_RDONLY)
1117 error = EJUSTRETURN;
1125 * Just call nfs_bioread() to do the work.
1127 * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1128 * struct ucred *a_cred)
1131 nfs_read(struct vop_read_args *ap)
1133 struct vnode *vp = ap->a_vp;
1135 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
1141 * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
1144 nfs_readlink(struct vop_readlink_args *ap)
1146 struct vnode *vp = ap->a_vp;
1148 if (vp->v_type != VLNK)
1150 return (nfs_bioread(vp, ap->a_uio, 0));
1154 * Do a readlink rpc.
1155 * Called by nfs_doio() from below the buffer cache.
1158 nfs_readlinkrpc(struct vnode *vp, struct uio *uiop)
1163 caddr_t bpos, dpos, cp2;
1164 int error = 0, len, attrflag;
1165 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1166 int v3 = NFS_ISV3(vp);
1168 nfsstats.rpccnt[NFSPROC_READLINK]++;
1169 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3));
1171 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_td, nfs_vpcred(vp, ND_CHECK));
1173 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
1175 nfsm_strsiz(len, NFS_MAXPATHLEN);
1176 if (len == NFS_MAXPATHLEN) {
1177 struct nfsnode *np = VTONFS(vp);
1178 if (np->n_size && np->n_size < NFS_MAXPATHLEN)
1181 nfsm_mtouio(uiop, len);
1193 nfs_readrpc(struct vnode *vp, struct uio *uiop)
1198 caddr_t bpos, dpos, cp2;
1199 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1200 struct nfsmount *nmp;
1201 int error = 0, len, retlen, tsiz, eof, attrflag;
1202 int v3 = NFS_ISV3(vp);
1207 nmp = VFSTONFS(vp->v_mount);
1208 tsiz = uiop->uio_resid;
1209 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1212 nfsstats.rpccnt[NFSPROC_READ]++;
1213 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
1214 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3);
1216 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3);
1218 txdr_hyper(uiop->uio_offset, tl);
1219 *(tl + 2) = txdr_unsigned(len);
1221 *tl++ = txdr_unsigned(uiop->uio_offset);
1222 *tl++ = txdr_unsigned(len);
1225 nfsm_request(vp, NFSPROC_READ, uiop->uio_td, nfs_vpcred(vp, ND_READ));
1227 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
1232 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1233 eof = fxdr_unsigned(int, *(tl + 1));
1235 nfsm_loadattr(vp, NULL);
1236 nfsm_strsiz(retlen, nmp->nm_rsize);
1237 nfsm_mtouio(uiop, retlen);
1241 if (eof || retlen == 0) {
1244 } else if (retlen < len) {
1256 nfs_writerpc(struct vnode *vp, struct uio *uiop, int *iomode, int *must_commit)
1260 int32_t t1, t2, backup;
1261 caddr_t bpos, dpos, cp2;
1262 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1263 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1264 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
1265 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC;
1268 if (uiop->uio_iovcnt != 1)
1269 panic("nfs: writerpc iovcnt > 1");
1272 tsiz = uiop->uio_resid;
1273 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1276 nfsstats.rpccnt[NFSPROC_WRITE]++;
1277 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1278 nfsm_reqhead(vp, NFSPROC_WRITE,
1279 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len));
1282 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
1283 txdr_hyper(uiop->uio_offset, tl);
1285 *tl++ = txdr_unsigned(len);
1286 *tl++ = txdr_unsigned(*iomode);
1287 *tl = txdr_unsigned(len);
1291 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1292 /* Set both "begin" and "current" to non-garbage. */
1293 x = txdr_unsigned((u_int32_t)uiop->uio_offset);
1294 *tl++ = x; /* "begin offset" */
1295 *tl++ = x; /* "current offset" */
1296 x = txdr_unsigned(len);
1297 *tl++ = x; /* total to this offset */
1298 *tl = x; /* size of this write */
1300 nfsm_uiotom(uiop, len);
1301 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_td, nfs_vpcred(vp, ND_WRITE));
1304 * The write RPC returns a before and after mtime. The
1305 * nfsm_wcc_data() macro checks the before n_mtime
1306 * against the before time and stores the after time
1307 * in the nfsnode's cached vattr and n_mtime field.
1308 * The NRMODIFIED bit will be set if the before
1309 * time did not match the original mtime.
1311 wccflag = NFSV3_WCCCHK;
1312 nfsm_wcc_data(vp, wccflag);
1314 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
1315 + NFSX_V3WRITEVERF);
1316 rlen = fxdr_unsigned(int, *tl++);
1321 } else if (rlen < len) {
1322 backup = len - rlen;
1323 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base - backup;
1324 uiop->uio_iov->iov_len += backup;
1325 uiop->uio_offset -= backup;
1326 uiop->uio_resid += backup;
1329 commit = fxdr_unsigned(int, *tl++);
1332 * Return the lowest committment level
1333 * obtained by any of the RPCs.
1335 if (committed == NFSV3WRITE_FILESYNC)
1337 else if (committed == NFSV3WRITE_DATASYNC &&
1338 commit == NFSV3WRITE_UNSTABLE)
1340 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){
1341 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1343 nmp->nm_state |= NFSSTA_HASWRITEVERF;
1344 } else if (bcmp((caddr_t)tl,
1345 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1347 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1352 nfsm_loadattr(vp, NULL);
1360 if (vp->v_mount->mnt_flag & MNT_ASYNC)
1361 committed = NFSV3WRITE_FILESYNC;
1362 *iomode = committed;
1364 uiop->uio_resid = tsiz;
1370 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1371 * mode set to specify the file type and the size field for rdev.
1374 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1377 struct nfsv2_sattr *sp;
1381 struct vnode *newvp = NULL;
1382 struct nfsnode *np = NULL;
1386 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
1387 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1389 int v3 = NFS_ISV3(dvp);
1391 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1392 rmajor = txdr_unsigned(vap->va_rmajor);
1393 rminor = txdr_unsigned(vap->va_rminor);
1394 } else if (vap->va_type == VFIFO || vap->va_type == VSOCK) {
1395 rmajor = nfs_xdrneg1;
1396 rminor = nfs_xdrneg1;
1398 return (EOPNOTSUPP);
1400 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
1403 nfsstats.rpccnt[NFSPROC_MKNOD]++;
1404 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED +
1405 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1406 nfsm_fhtom(dvp, v3);
1407 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1409 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1410 *tl++ = vtonfsv3_type(vap->va_type);
1411 nfsm_v3attrbuild(vap, FALSE);
1412 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1413 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1414 *tl++ = txdr_unsigned(vap->va_rmajor);
1415 *tl = txdr_unsigned(vap->va_rminor);
1418 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1419 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1420 sp->sa_uid = nfs_xdrneg1;
1421 sp->sa_gid = nfs_xdrneg1;
1422 sp->sa_size = makeudev(rmajor, rminor);
1423 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1424 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1426 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_td, cnp->cn_cred);
1428 nfsm_mtofh(dvp, newvp, v3, gotvp);
1434 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1435 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1441 nfsm_wcc_data(dvp, wccflag);
1450 VTONFS(dvp)->n_flag |= NLMODIFIED;
1452 VTONFS(dvp)->n_attrstamp = 0;
1458 * just call nfs_mknodrpc() to do the work.
1460 * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
1461 * struct componentname *a_cnp, struct vattr *a_vap)
1465 nfs_mknod(struct vop_old_mknod_args *ap)
1467 return nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1470 static u_long create_verf;
1472 * nfs file create call
1474 * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
1475 * struct componentname *a_cnp, struct vattr *a_vap)
1478 nfs_create(struct vop_old_create_args *ap)
1480 struct vnode *dvp = ap->a_dvp;
1481 struct vattr *vap = ap->a_vap;
1482 struct componentname *cnp = ap->a_cnp;
1483 struct nfsv2_sattr *sp;
1487 struct nfsnode *np = NULL;
1488 struct vnode *newvp = NULL;
1489 caddr_t bpos, dpos, cp2;
1490 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
1491 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1493 int v3 = NFS_ISV3(dvp);
1496 * Oops, not for me..
1498 if (vap->va_type == VSOCK)
1499 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1501 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
1504 if (vap->va_vaflags & VA_EXCLUSIVE)
1507 nfsstats.rpccnt[NFSPROC_CREATE]++;
1508 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED +
1509 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1510 nfsm_fhtom(dvp, v3);
1511 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1513 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1514 if (fmode & O_EXCL) {
1515 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
1516 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF);
1518 if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid]))
1519 *tl++ = IA_SIN(TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia)->sin_addr.s_addr;
1522 *tl++ = create_verf;
1523 *tl = ++create_verf;
1525 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
1526 nfsm_v3attrbuild(vap, FALSE);
1529 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1530 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1531 sp->sa_uid = nfs_xdrneg1;
1532 sp->sa_gid = nfs_xdrneg1;
1534 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1535 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1537 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_td, cnp->cn_cred);
1539 nfsm_mtofh(dvp, newvp, v3, gotvp);
1545 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1546 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1552 nfsm_wcc_data(dvp, wccflag);
1556 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
1557 KKASSERT(newvp == NULL);
1561 } else if (v3 && (fmode & O_EXCL)) {
1563 * We are normally called with only a partially initialized
1564 * VAP. Since the NFSv3 spec says that server may use the
1565 * file attributes to store the verifier, the spec requires
1566 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1567 * in atime, but we can't really assume that all servers will
1568 * so we ensure that our SETATTR sets both atime and mtime.
1570 if (vap->va_mtime.tv_sec == VNOVAL)
1571 vfs_timestamp(&vap->va_mtime);
1572 if (vap->va_atime.tv_sec == VNOVAL)
1573 vap->va_atime = vap->va_mtime;
1574 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td);
1578 * The new np may have enough info for access
1579 * checks, make sure rucred and wucred are
1580 * initialized for read and write rpc's.
1583 if (np->n_rucred == NULL)
1584 np->n_rucred = crhold(cnp->cn_cred);
1585 if (np->n_wucred == NULL)
1586 np->n_wucred = crhold(cnp->cn_cred);
1591 VTONFS(dvp)->n_flag |= NLMODIFIED;
1593 VTONFS(dvp)->n_attrstamp = 0;
1598 * nfs file remove call
1599 * To try and make nfs semantics closer to ufs semantics, a file that has
1600 * other processes using the vnode is renamed instead of removed and then
1601 * removed later on the last close.
1602 * - If v_sysref.refcnt > 1
1603 * If a rename is not already in the works
1604 * call nfs_sillyrename() to set it up
1608 * nfs_remove(struct vnode *a_dvp, struct vnode *a_vp,
1609 * struct componentname *a_cnp)
1612 nfs_remove(struct vop_old_remove_args *ap)
1614 struct vnode *vp = ap->a_vp;
1615 struct vnode *dvp = ap->a_dvp;
1616 struct componentname *cnp = ap->a_cnp;
1617 struct nfsnode *np = VTONFS(vp);
1622 if (vp->v_sysref.refcnt < 1)
1623 panic("nfs_remove: bad v_sysref.refcnt");
1625 if (vp->v_type == VDIR)
1627 else if (vp->v_sysref.refcnt == 1 || (np->n_sillyrename &&
1628 VOP_GETATTR(vp, &vattr) == 0 &&
1629 vattr.va_nlink > 1)) {
1631 * throw away biocache buffers, mainly to avoid
1632 * unnecessary delayed writes later.
1634 error = nfs_vinvalbuf(vp, 0, 1);
1637 error = nfs_removerpc(dvp, cnp->cn_nameptr,
1638 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td);
1640 * Kludge City: If the first reply to the remove rpc is lost..
1641 * the reply to the retransmitted request will be ENOENT
1642 * since the file was in fact removed
1643 * Therefore, we cheat and return success.
1645 if (error == ENOENT)
1647 } else if (!np->n_sillyrename) {
1648 error = nfs_sillyrename(dvp, vp, cnp);
1650 np->n_attrstamp = 0;
1655 * nfs file remove rpc called from nfs_inactive
1658 nfs_removeit(struct sillyrename *sp)
1660 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen,
1665 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1668 nfs_removerpc(struct vnode *dvp, const char *name, int namelen,
1669 struct ucred *cred, struct thread *td)
1674 caddr_t bpos, dpos, cp2;
1675 int error = 0, wccflag = NFSV3_WCCRATTR;
1676 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1677 int v3 = NFS_ISV3(dvp);
1679 nfsstats.rpccnt[NFSPROC_REMOVE]++;
1680 nfsm_reqhead(dvp, NFSPROC_REMOVE,
1681 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1682 nfsm_fhtom(dvp, v3);
1683 nfsm_strtom(name, namelen, NFS_MAXNAMLEN);
1684 nfsm_request(dvp, NFSPROC_REMOVE, td, cred);
1686 nfsm_wcc_data(dvp, wccflag);
1689 VTONFS(dvp)->n_flag |= NLMODIFIED;
1691 VTONFS(dvp)->n_attrstamp = 0;
1696 * nfs file rename call
1698 * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
1699 * struct componentname *a_fcnp, struct vnode *a_tdvp,
1700 * struct vnode *a_tvp, struct componentname *a_tcnp)
1703 nfs_rename(struct vop_old_rename_args *ap)
1705 struct vnode *fvp = ap->a_fvp;
1706 struct vnode *tvp = ap->a_tvp;
1707 struct vnode *fdvp = ap->a_fdvp;
1708 struct vnode *tdvp = ap->a_tdvp;
1709 struct componentname *tcnp = ap->a_tcnp;
1710 struct componentname *fcnp = ap->a_fcnp;
1713 /* Check for cross-device rename */
1714 if ((fvp->v_mount != tdvp->v_mount) ||
1715 (tvp && (fvp->v_mount != tvp->v_mount))) {
1721 * We shouldn't have to flush fvp on rename for most server-side
1722 * filesystems as the file handle should not change. Unfortunately
1723 * the inode for some filesystems (msdosfs) might be tied to the
1724 * file name or directory position so to be completely safe
1725 * vfs.nfs.flush_on_rename is set by default. Clear to improve
1728 * We must flush tvp on rename because it might become stale on the
1729 * server after the rename.
1731 if (nfs_flush_on_rename)
1732 VOP_FSYNC(fvp, MNT_WAIT);
1734 VOP_FSYNC(tvp, MNT_WAIT);
1737 * If the tvp exists and is in use, sillyrename it before doing the
1738 * rename of the new file over it.
1740 * XXX Can't sillyrename a directory.
1742 * We do not attempt to do any namecache purges in this old API
1743 * routine. The new API compat functions have access to the actual
1744 * namecache structures and will do it for us.
1746 if (tvp && tvp->v_sysref.refcnt > 1 && !VTONFS(tvp)->n_sillyrename &&
1747 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1754 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1755 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1768 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1770 if (error == ENOENT)
1776 * nfs file rename rpc called from nfs_remove() above
1779 nfs_renameit(struct vnode *sdvp, struct componentname *scnp,
1780 struct sillyrename *sp)
1782 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
1783 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td));
1787 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1790 nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen,
1791 struct vnode *tdvp, const char *tnameptr, int tnamelen,
1792 struct ucred *cred, struct thread *td)
1797 caddr_t bpos, dpos, cp2;
1798 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
1799 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1800 int v3 = NFS_ISV3(fdvp);
1802 nfsstats.rpccnt[NFSPROC_RENAME]++;
1803 nfsm_reqhead(fdvp, NFSPROC_RENAME,
1804 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) +
1805 nfsm_rndup(tnamelen));
1806 nfsm_fhtom(fdvp, v3);
1807 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN);
1808 nfsm_fhtom(tdvp, v3);
1809 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN);
1810 nfsm_request(fdvp, NFSPROC_RENAME, td, cred);
1812 nfsm_wcc_data(fdvp, fwccflag);
1813 nfsm_wcc_data(tdvp, twccflag);
1817 VTONFS(fdvp)->n_flag |= NLMODIFIED;
1818 VTONFS(tdvp)->n_flag |= NLMODIFIED;
1820 VTONFS(fdvp)->n_attrstamp = 0;
1822 VTONFS(tdvp)->n_attrstamp = 0;
1827 * nfs hard link create call
1829 * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp,
1830 * struct componentname *a_cnp)
1833 nfs_link(struct vop_old_link_args *ap)
1835 struct vnode *vp = ap->a_vp;
1836 struct vnode *tdvp = ap->a_tdvp;
1837 struct componentname *cnp = ap->a_cnp;
1841 caddr_t bpos, dpos, cp2;
1842 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
1843 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1846 if (vp->v_mount != tdvp->v_mount) {
1851 * The attribute cache may get out of sync with the server on link.
1852 * Pushing writes to the server before handle was inherited from
1853 * long long ago and it is unclear if we still need to do this.
1856 if (nfs_flush_on_hlink)
1857 VOP_FSYNC(vp, MNT_WAIT);
1860 nfsstats.rpccnt[NFSPROC_LINK]++;
1861 nfsm_reqhead(vp, NFSPROC_LINK,
1862 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
1864 nfsm_fhtom(tdvp, v3);
1865 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1866 nfsm_request(vp, NFSPROC_LINK, cnp->cn_td, cnp->cn_cred);
1868 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
1869 nfsm_wcc_data(tdvp, wccflag);
1873 VTONFS(tdvp)->n_flag |= NLMODIFIED;
1875 VTONFS(vp)->n_attrstamp = 0;
1877 VTONFS(tdvp)->n_attrstamp = 0;
1879 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1881 if (error == EEXIST)
1887 * nfs symbolic link create call
1889 * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1890 * struct componentname *a_cnp, struct vattr *a_vap,
1894 nfs_symlink(struct vop_old_symlink_args *ap)
1896 struct vnode *dvp = ap->a_dvp;
1897 struct vattr *vap = ap->a_vap;
1898 struct componentname *cnp = ap->a_cnp;
1899 struct nfsv2_sattr *sp;
1903 caddr_t bpos, dpos, cp2;
1904 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
1905 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1906 struct vnode *newvp = NULL;
1907 int v3 = NFS_ISV3(dvp);
1909 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1910 slen = strlen(ap->a_target);
1911 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED +
1912 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3));
1913 nfsm_fhtom(dvp, v3);
1914 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1916 nfsm_v3attrbuild(vap, FALSE);
1918 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
1920 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1921 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
1922 sp->sa_uid = nfs_xdrneg1;
1923 sp->sa_gid = nfs_xdrneg1;
1924 sp->sa_size = nfs_xdrneg1;
1925 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1926 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1930 * Issue the NFS request and get the rpc response.
1932 * Only NFSv3 responses returning an error of 0 actually return
1933 * a file handle that can be converted into newvp without having
1934 * to do an extra lookup rpc.
1936 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_td, cnp->cn_cred);
1939 nfsm_mtofh(dvp, newvp, v3, gotvp);
1940 nfsm_wcc_data(dvp, wccflag);
1944 * out code jumps -> here, mrep is also freed.
1951 * If we get an EEXIST error, silently convert it to no-error
1952 * in case of an NFS retry.
1954 if (error == EEXIST)
1958 * If we do not have (or no longer have) an error, and we could
1959 * not extract the newvp from the response due to the request being
1960 * NFSv2 or the error being EEXIST. We have to do a lookup in order
1961 * to obtain a newvp to return.
1963 if (error == 0 && newvp == NULL) {
1964 struct nfsnode *np = NULL;
1966 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1967 cnp->cn_cred, cnp->cn_td, &np);
1977 VTONFS(dvp)->n_flag |= NLMODIFIED;
1979 VTONFS(dvp)->n_attrstamp = 0;
1986 * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
1987 * struct componentname *a_cnp, struct vattr *a_vap)
1990 nfs_mkdir(struct vop_old_mkdir_args *ap)
1992 struct vnode *dvp = ap->a_dvp;
1993 struct vattr *vap = ap->a_vap;
1994 struct componentname *cnp = ap->a_cnp;
1995 struct nfsv2_sattr *sp;
2000 struct nfsnode *np = NULL;
2001 struct vnode *newvp = NULL;
2002 caddr_t bpos, dpos, cp2;
2003 int error = 0, wccflag = NFSV3_WCCRATTR;
2005 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2007 int v3 = NFS_ISV3(dvp);
2009 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
2012 len = cnp->cn_namelen;
2013 nfsstats.rpccnt[NFSPROC_MKDIR]++;
2014 nfsm_reqhead(dvp, NFSPROC_MKDIR,
2015 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3));
2016 nfsm_fhtom(dvp, v3);
2017 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
2019 nfsm_v3attrbuild(vap, FALSE);
2021 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
2022 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
2023 sp->sa_uid = nfs_xdrneg1;
2024 sp->sa_gid = nfs_xdrneg1;
2025 sp->sa_size = nfs_xdrneg1;
2026 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
2027 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
2029 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_td, cnp->cn_cred);
2031 nfsm_mtofh(dvp, newvp, v3, gotvp);
2033 nfsm_wcc_data(dvp, wccflag);
2036 VTONFS(dvp)->n_flag |= NLMODIFIED;
2038 VTONFS(dvp)->n_attrstamp = 0;
2040 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
2041 * if we can succeed in looking up the directory.
2043 if (error == EEXIST || (!error && !gotvp)) {
2048 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
2052 if (newvp->v_type != VDIR)
2065 * nfs remove directory call
2067 * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
2068 * struct componentname *a_cnp)
2071 nfs_rmdir(struct vop_old_rmdir_args *ap)
2073 struct vnode *vp = ap->a_vp;
2074 struct vnode *dvp = ap->a_dvp;
2075 struct componentname *cnp = ap->a_cnp;
2079 caddr_t bpos, dpos, cp2;
2080 int error = 0, wccflag = NFSV3_WCCRATTR;
2081 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2082 int v3 = NFS_ISV3(dvp);
2086 nfsstats.rpccnt[NFSPROC_RMDIR]++;
2087 nfsm_reqhead(dvp, NFSPROC_RMDIR,
2088 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
2089 nfsm_fhtom(dvp, v3);
2090 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
2091 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_td, cnp->cn_cred);
2093 nfsm_wcc_data(dvp, wccflag);
2096 VTONFS(dvp)->n_flag |= NLMODIFIED;
2098 VTONFS(dvp)->n_attrstamp = 0;
2100 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2102 if (error == ENOENT)
2110 * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
2113 nfs_readdir(struct vop_readdir_args *ap)
2115 struct vnode *vp = ap->a_vp;
2116 struct nfsnode *np = VTONFS(vp);
2117 struct uio *uio = ap->a_uio;
2121 if (vp->v_type != VDIR)
2124 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0)
2128 * If we have a valid EOF offset cache we must call VOP_GETATTR()
2129 * and then check that is still valid, or if this is an NQNFS mount
2130 * we call NQNFS_CKCACHEABLE() instead of VOP_GETATTR(). Note that
2131 * VOP_GETATTR() does not necessarily go to the wire.
2133 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2134 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0) {
2135 if (VOP_GETATTR(vp, &vattr) == 0 &&
2136 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0
2138 nfsstats.direofcache_hits++;
2144 * Call nfs_bioread() to do the real work. nfs_bioread() does its
2145 * own cache coherency checks so we do not have to.
2147 tresid = uio->uio_resid;
2148 error = nfs_bioread(vp, uio, 0);
2150 if (!error && uio->uio_resid == tresid)
2151 nfsstats.direofcache_misses++;
2158 * Readdir rpc call. nfs_bioread->nfs_doio->nfs_readdirrpc.
2160 * Note that for directories, nfs_bioread maintains the underlying nfs-centric
2161 * offset/block and converts the nfs formatted directory entries for userland
2162 * consumption as well as deals with offsets into the middle of blocks.
2163 * nfs_doio only deals with logical blocks. In particular, uio_offset will
2164 * be block-bounded. It must convert to cookies for the actual RPC.
2167 nfs_readdirrpc(struct vnode *vp, struct uio *uiop)
2170 struct nfs_dirent *dp = NULL;
2175 caddr_t bpos, dpos, cp2;
2176 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2178 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2179 struct nfsnode *dnp = VTONFS(vp);
2181 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2183 int v3 = NFS_ISV3(vp);
2186 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2187 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2188 panic("nfs readdirrpc bad uio");
2192 * If there is no cookie, assume directory was stale.
2194 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2198 return (NFSERR_BAD_COOKIE);
2200 * Loop around doing readdir rpc's of size nm_readdirsize
2201 * truncated to a multiple of DIRBLKSIZ.
2202 * The stopping criteria is EOF or buffer full.
2204 while (more_dirs && bigenough) {
2205 nfsstats.rpccnt[NFSPROC_READDIR]++;
2206 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) +
2210 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
2211 *tl++ = cookie.nfsuquad[0];
2212 *tl++ = cookie.nfsuquad[1];
2213 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2214 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2216 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2217 *tl++ = cookie.nfsuquad[0];
2219 *tl = txdr_unsigned(nmp->nm_readdirsize);
2220 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_td, nfs_vpcred(vp, ND_READ));
2222 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
2224 nfsm_dissect(tl, u_int32_t *,
2226 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2227 dnp->n_cookieverf.nfsuquad[1] = *tl;
2233 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2234 more_dirs = fxdr_unsigned(int, *tl);
2236 /* loop thru the dir entries, converting them to std form */
2237 while (more_dirs && bigenough) {
2239 nfsm_dissect(tl, u_int32_t *,
2241 fileno = fxdr_hyper(tl);
2242 len = fxdr_unsigned(int, *(tl + 2));
2244 nfsm_dissect(tl, u_int32_t *,
2246 fileno = fxdr_unsigned(u_quad_t, *tl++);
2247 len = fxdr_unsigned(int, *tl);
2249 if (len <= 0 || len > NFS_MAXNAMLEN) {
2256 * len is the number of bytes in the path element
2257 * name, not including the \0 termination.
2259 * tlen is the number of bytes w have to reserve for
2260 * the path element name.
2262 tlen = nfsm_rndup(len);
2264 tlen += 4; /* To ensure null termination */
2267 * If the entry would cross a DIRBLKSIZ boundary,
2268 * extend the previous nfs_dirent to cover the
2271 left = DIRBLKSIZ - blksiz;
2272 if ((tlen + sizeof(struct nfs_dirent)) > left) {
2273 dp->nfs_reclen += left;
2274 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
2275 uiop->uio_iov->iov_len -= left;
2276 uiop->uio_offset += left;
2277 uiop->uio_resid -= left;
2280 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid)
2283 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base;
2284 dp->nfs_ino = fileno;
2285 dp->nfs_namlen = len;
2286 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent);
2287 dp->nfs_type = DT_UNKNOWN;
2288 blksiz += dp->nfs_reclen;
2289 if (blksiz == DIRBLKSIZ)
2291 uiop->uio_offset += sizeof(struct nfs_dirent);
2292 uiop->uio_resid -= sizeof(struct nfs_dirent);
2293 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent);
2294 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent);
2295 nfsm_mtouio(uiop, len);
2298 * The uiop has advanced by nfs_dirent + len
2299 * but really needs to advance by
2302 cp = uiop->uio_iov->iov_base;
2304 *cp = '\0'; /* null terminate */
2305 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen;
2306 uiop->uio_iov->iov_len -= tlen;
2307 uiop->uio_offset += tlen;
2308 uiop->uio_resid -= tlen;
2311 * NFS strings must be rounded up (nfsm_myouio
2312 * handled that in the bigenough case).
2314 nfsm_adv(nfsm_rndup(len));
2317 nfsm_dissect(tl, u_int32_t *,
2320 nfsm_dissect(tl, u_int32_t *,
2325 * If we were able to accomodate the last entry,
2326 * get the cookie for the next one. Otherwise
2327 * hold-over the cookie for the one we were not
2328 * able to accomodate.
2331 cookie.nfsuquad[0] = *tl++;
2333 cookie.nfsuquad[1] = *tl++;
2339 more_dirs = fxdr_unsigned(int, *tl);
2342 * If at end of rpc data, get the eof boolean
2345 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2346 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2351 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2352 * by increasing d_reclen for the last record.
2355 left = DIRBLKSIZ - blksiz;
2356 dp->nfs_reclen += left;
2357 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
2358 uiop->uio_iov->iov_len -= left;
2359 uiop->uio_offset += left;
2360 uiop->uio_resid -= left;
2365 * We hit the end of the directory, update direofoffset.
2367 dnp->n_direofoffset = uiop->uio_offset;
2370 * There is more to go, insert the link cookie so the
2371 * next block can be read.
2373 if (uiop->uio_resid > 0)
2374 kprintf("EEK! readdirrpc resid > 0\n");
2375 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2383 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2386 nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop)
2389 struct nfs_dirent *dp;
2393 struct vnode *newvp;
2395 caddr_t bpos, dpos, cp2, dpossav1, dpossav2;
2396 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2;
2398 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2399 struct nfsnode *dnp = VTONFS(vp), *np;
2402 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2403 int attrflag, fhsize;
2404 struct nchandle nch;
2405 struct nchandle dnch;
2406 struct nlcomponent nlc;
2412 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2413 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2414 panic("nfs readdirplusrpc bad uio");
2417 * Obtain the namecache record for the directory so we have something
2418 * to use as a basis for creating the entries. This function will
2419 * return a held (but not locked) ncp. The ncp may be disconnected
2420 * from the tree and cannot be used for upward traversals, and the
2421 * ncp may be unnamed. Note that other unrelated operations may
2422 * cause the ncp to be named at any time.
2424 cache_fromdvp(vp, NULL, 0, &dnch);
2425 bzero(&nlc, sizeof(nlc));
2429 * If there is no cookie, assume directory was stale.
2431 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2435 return (NFSERR_BAD_COOKIE);
2437 * Loop around doing readdir rpc's of size nm_readdirsize
2438 * truncated to a multiple of DIRBLKSIZ.
2439 * The stopping criteria is EOF or buffer full.
2441 while (more_dirs && bigenough) {
2442 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
2443 nfsm_reqhead(vp, NFSPROC_READDIRPLUS,
2444 NFSX_FH(1) + 6 * NFSX_UNSIGNED);
2446 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
2447 *tl++ = cookie.nfsuquad[0];
2448 *tl++ = cookie.nfsuquad[1];
2449 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2450 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2451 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2452 *tl = txdr_unsigned(nmp->nm_rsize);
2453 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_td, nfs_vpcred(vp, ND_READ));
2454 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
2459 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2460 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2461 dnp->n_cookieverf.nfsuquad[1] = *tl++;
2462 more_dirs = fxdr_unsigned(int, *tl);
2464 /* loop thru the dir entries, doctoring them to 4bsd form */
2465 while (more_dirs && bigenough) {
2466 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2467 fileno = fxdr_hyper(tl);
2468 len = fxdr_unsigned(int, *(tl + 2));
2469 if (len <= 0 || len > NFS_MAXNAMLEN) {
2474 tlen = nfsm_rndup(len);
2476 tlen += 4; /* To ensure null termination*/
2477 left = DIRBLKSIZ - blksiz;
2478 if ((tlen + sizeof(struct nfs_dirent)) > left) {
2479 dp->nfs_reclen += left;
2480 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
2481 uiop->uio_iov->iov_len -= left;
2482 uiop->uio_offset += left;
2483 uiop->uio_resid -= left;
2486 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid)
2489 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base;
2490 dp->nfs_ino = fileno;
2491 dp->nfs_namlen = len;
2492 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent);
2493 dp->nfs_type = DT_UNKNOWN;
2494 blksiz += dp->nfs_reclen;
2495 if (blksiz == DIRBLKSIZ)
2497 uiop->uio_offset += sizeof(struct nfs_dirent);
2498 uiop->uio_resid -= sizeof(struct nfs_dirent);
2499 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent);
2500 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent);
2501 nlc.nlc_nameptr = uiop->uio_iov->iov_base;
2502 nlc.nlc_namelen = len;
2503 nfsm_mtouio(uiop, len);
2504 cp = uiop->uio_iov->iov_base;
2507 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen;
2508 uiop->uio_iov->iov_len -= tlen;
2509 uiop->uio_offset += tlen;
2510 uiop->uio_resid -= tlen;
2512 nfsm_adv(nfsm_rndup(len));
2513 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2515 cookie.nfsuquad[0] = *tl++;
2516 cookie.nfsuquad[1] = *tl++;
2521 * Since the attributes are before the file handle
2522 * (sigh), we must skip over the attributes and then
2523 * come back and get them.
2525 attrflag = fxdr_unsigned(int, *tl);
2529 nfsm_adv(NFSX_V3FATTR);
2530 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2531 doit = fxdr_unsigned(int, *tl);
2533 nfsm_getfh(fhp, fhsize, 1);
2534 if (NFS_CMPFH(dnp, fhp, fhsize)) {
2539 error = nfs_nget(vp->v_mount, fhp,
2547 if (doit && bigenough) {
2552 nfsm_loadattr(newvp, NULL);
2556 IFTODT(VTTOIF(np->n_vattr.va_type));
2558 kprintf("NFS/READDIRPLUS, ENTER %*.*s\n",
2559 nlc.nlc_namelen, nlc.nlc_namelen,
2561 nch = cache_nlookup(&dnch, &nlc);
2562 cache_setunresolved(&nch);
2563 nfs_cache_setvp(&nch, newvp,
2564 nfspos_cache_timeout);
2567 kprintf("NFS/READDIRPLUS, UNABLE TO ENTER"
2569 nlc.nlc_namelen, nlc.nlc_namelen,
2574 /* Just skip over the file handle */
2575 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2576 i = fxdr_unsigned(int, *tl);
2577 nfsm_adv(nfsm_rndup(i));
2579 if (newvp != NULLVP) {
2586 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2587 more_dirs = fxdr_unsigned(int, *tl);
2590 * If at end of rpc data, get the eof boolean
2593 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2594 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2599 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2600 * by increasing d_reclen for the last record.
2603 left = DIRBLKSIZ - blksiz;
2604 dp->nfs_reclen += left;
2605 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
2606 uiop->uio_iov->iov_len -= left;
2607 uiop->uio_offset += left;
2608 uiop->uio_resid -= left;
2612 * We are now either at the end of the directory or have filled the
2616 dnp->n_direofoffset = uiop->uio_offset;
2618 if (uiop->uio_resid > 0)
2619 kprintf("EEK! readdirplusrpc resid > 0\n");
2620 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2624 if (newvp != NULLVP) {
2637 * Silly rename. To make the NFS filesystem that is stateless look a little
2638 * more like the "ufs" a remove of an active vnode is translated to a rename
2639 * to a funny looking filename that is removed by nfs_inactive on the
2640 * nfsnode. There is the potential for another process on a different client
2641 * to create the same funny name between the nfs_lookitup() fails and the
2642 * nfs_rename() completes, but...
2645 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2647 struct sillyrename *sp;
2652 * We previously purged dvp instead of vp. I don't know why, it
2653 * completely destroys performance. We can't do it anyway with the
2654 * new VFS API since we would be breaking the namecache topology.
2656 cache_purge(vp); /* XXX */
2659 if (vp->v_type == VDIR)
2660 panic("nfs: sillyrename dir");
2662 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2663 M_NFSREQ, M_WAITOK);
2664 sp->s_cred = crdup(cnp->cn_cred);
2668 /* Fudge together a funny name */
2669 sp->s_namlen = ksprintf(sp->s_name, ".nfsA%08x4.4", (int)cnp->cn_td);
2671 /* Try lookitups until we get one that isn't there */
2672 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2673 cnp->cn_td, NULL) == 0) {
2675 if (sp->s_name[4] > 'z') {
2680 error = nfs_renameit(dvp, cnp, sp);
2683 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2685 np->n_sillyrename = sp;
2690 kfree((caddr_t)sp, M_NFSREQ);
2695 * Look up a file name and optionally either update the file handle or
2696 * allocate an nfsnode, depending on the value of npp.
2697 * npp == NULL --> just do the lookup
2698 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2700 * *npp != NULL --> update the file handle in the vnode
2703 nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred,
2704 struct thread *td, struct nfsnode **npp)
2709 struct vnode *newvp = NULL;
2710 struct nfsnode *np, *dnp = VTONFS(dvp);
2711 caddr_t bpos, dpos, cp2;
2712 int error = 0, fhlen, attrflag;
2713 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2715 int v3 = NFS_ISV3(dvp);
2717 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
2718 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
2719 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2720 nfsm_fhtom(dvp, v3);
2721 nfsm_strtom(name, len, NFS_MAXNAMLEN);
2722 nfsm_request(dvp, NFSPROC_LOOKUP, td, cred);
2723 if (npp && !error) {
2724 nfsm_getfh(nfhp, fhlen, v3);
2727 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2728 kfree((caddr_t)np->n_fhp, M_NFSBIGFH);
2729 np->n_fhp = &np->n_fh;
2730 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2731 np->n_fhp =(nfsfh_t *)kmalloc(fhlen,M_NFSBIGFH,M_WAITOK);
2732 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2733 np->n_fhsize = fhlen;
2735 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
2739 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
2747 nfsm_postop_attr(newvp, attrflag, NFS_LATTR_NOSHRINK);
2748 if (!attrflag && *npp == NULL) {
2757 nfsm_loadattr(newvp, NULL);
2761 if (npp && *npp == NULL) {
2776 * Nfs Version 3 commit rpc
2779 nfs_commit(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td)
2784 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2785 caddr_t bpos, dpos, cp2;
2786 int error = 0, wccflag = NFSV3_WCCRATTR;
2787 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2789 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
2791 nfsstats.rpccnt[NFSPROC_COMMIT]++;
2792 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1));
2794 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2795 txdr_hyper(offset, tl);
2797 *tl = txdr_unsigned(cnt);
2798 nfsm_request(vp, NFSPROC_COMMIT, td, nfs_vpcred(vp, ND_WRITE));
2799 nfsm_wcc_data(vp, wccflag);
2801 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF);
2802 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
2803 NFSX_V3WRITEVERF)) {
2804 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
2806 error = NFSERR_STALEWRITEVERF;
2816 * - make nfs_bmap() essentially a no-op that does no translation
2817 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
2818 * (Maybe I could use the process's page mapping, but I was concerned that
2819 * Kernel Write might not be enabled and also figured copyout() would do
2820 * a lot more work than bcopy() and also it currently happens in the
2821 * context of the swapper process (2).
2823 * nfs_bmap(struct vnode *a_vp, off_t a_loffset,
2824 * off_t *a_doffsetp, int *a_runp, int *a_runb)
2827 nfs_bmap(struct vop_bmap_args *ap)
2829 if (ap->a_doffsetp != NULL)
2830 *ap->a_doffsetp = ap->a_loffset;
2831 if (ap->a_runp != NULL)
2833 if (ap->a_runb != NULL)
2841 * For async requests when nfsiod(s) are running, queue the request by
2842 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the
2846 nfs_strategy(struct vop_strategy_args *ap)
2848 struct bio *bio = ap->a_bio;
2850 struct buf *bp = bio->bio_buf;
2854 KASSERT(bp->b_cmd != BUF_CMD_DONE,
2855 ("nfs_strategy: buffer %p unexpectedly marked done", bp));
2856 KASSERT(BUF_REFCNT(bp) > 0,
2857 ("nfs_strategy: buffer %p not locked", bp));
2859 if (bp->b_flags & B_ASYNC)
2862 td = curthread; /* XXX */
2865 * We probably don't need to push an nbio any more since no
2866 * block conversion is required due to the use of 64 bit byte
2867 * offsets, but do it anyway.
2869 nbio = push_bio(bio);
2870 nbio->bio_offset = bio->bio_offset;
2873 * If the op is asynchronous and an i/o daemon is waiting
2874 * queue the request, wake it up and wait for completion
2875 * otherwise just do it ourselves.
2877 if ((bp->b_flags & B_ASYNC) == 0 || nfs_asyncio(ap->a_vp, nbio, td))
2878 error = nfs_doio(ap->a_vp, nbio, td);
2885 * NB Currently unsupported.
2887 * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred)
2891 nfs_mmap(struct vop_mmap_args *ap)
2897 * fsync vnode op. Just call nfs_flush() with commit == 1.
2899 * nfs_fsync(struct vnode *a_vp, int a_waitfor)
2903 nfs_fsync(struct vop_fsync_args *ap)
2905 return (nfs_flush(ap->a_vp, ap->a_waitfor, curthread, 1));
2909 * Flush all the blocks associated with a vnode. Dirty NFS buffers may be
2910 * in one of two states: If B_NEEDCOMMIT is clear then the buffer contains
2911 * new NFS data which needs to be written to the server. If B_NEEDCOMMIT is
2912 * set the buffer contains data that has already been written to the server
2913 * and which now needs a commit RPC.
2915 * If commit is 0 we only take one pass and only flush buffers containing new
2918 * If commit is 1 we take two passes, issuing a commit RPC in the second
2921 * If waitfor is MNT_WAIT and commit is 1, we loop as many times as required
2922 * to completely flush all pending data.
2924 * Note that the RB_SCAN code properly handles the case where the
2925 * callback might block and directly or indirectly (another thread) cause
2926 * the RB tree to change.
2929 #ifndef NFS_COMMITBVECSIZ
2930 #define NFS_COMMITBVECSIZ 16
2933 struct nfs_flush_info {
2934 enum { NFI_FLUSHNEW, NFI_COMMIT } mode;
2941 struct buf *bvary[NFS_COMMITBVECSIZ];
2947 static int nfs_flush_bp(struct buf *bp, void *data);
2948 static int nfs_flush_docommit(struct nfs_flush_info *info, int error);
2951 nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit)
2953 struct nfsnode *np = VTONFS(vp);
2954 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2955 struct nfs_flush_info info;
2958 bzero(&info, sizeof(info));
2961 info.waitfor = waitfor;
2962 info.slpflag = (nmp->nm_flag & NFSMNT_INT) ? PCATCH : 0;
2969 info.mode = NFI_FLUSHNEW;
2970 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
2971 nfs_flush_bp, &info);
2974 * Take a second pass if committing and no error occured.
2975 * Clean up any left over collection (whether an error
2978 if (commit && error == 0) {
2979 info.mode = NFI_COMMIT;
2980 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
2981 nfs_flush_bp, &info);
2983 error = nfs_flush_docommit(&info, error);
2987 * Wait for pending I/O to complete before checking whether
2988 * any further dirty buffers exist.
2990 while (waitfor == MNT_WAIT && vp->v_track_write.bk_active) {
2991 vp->v_track_write.bk_waitflag = 1;
2992 error = tsleep(&vp->v_track_write,
2993 info.slpflag, "nfsfsync", info.slptimeo);
2996 * We have to be able to break out if this
2997 * is an 'intr' mount.
2999 if (nfs_sigintr(nmp, NULL, td)) {
3005 * Since we do not process pending signals,
3006 * once we get a PCATCH our tsleep() will no
3007 * longer sleep, switch to a fixed timeout
3010 if (info.slpflag == PCATCH) {
3012 info.slptimeo = 2 * hz;
3019 * Loop if we are flushing synchronous as well as committing,
3020 * and dirty buffers are still present. Otherwise we might livelock.
3022 } while (waitfor == MNT_WAIT && commit &&
3023 error == 0 && !RB_EMPTY(&vp->v_rbdirty_tree));
3026 * The callbacks have to return a negative error to terminate the
3033 * Deal with any error collection
3035 if (np->n_flag & NWRITEERR) {
3036 error = np->n_error;
3037 np->n_flag &= ~NWRITEERR;
3045 nfs_flush_bp(struct buf *bp, void *data)
3047 struct nfs_flush_info *info = data;
3052 switch(info->mode) {
3055 if (info->loops && info->waitfor == MNT_WAIT) {
3056 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT);
3058 int lkflags = LK_EXCLUSIVE | LK_SLEEPFAIL;
3059 if (info->slpflag & PCATCH)
3060 lkflags |= LK_PCATCH;
3061 error = BUF_TIMELOCK(bp, lkflags, "nfsfsync",
3065 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT);
3068 KKASSERT(bp->b_vp == info->vp);
3070 if ((bp->b_flags & B_DELWRI) == 0)
3071 panic("nfs_fsync: not dirty");
3072 if (bp->b_flags & B_NEEDCOMMIT) {
3088 * Only process buffers in need of a commit which we can
3089 * immediately lock. This may prevent a buffer from being
3090 * committed, but the normal flush loop will block on the
3091 * same buffer so we shouldn't get into an endless loop.
3094 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
3095 (B_DELWRI | B_NEEDCOMMIT) ||
3096 BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT) != 0) {
3101 KKASSERT(bp->b_vp == info->vp);
3105 * NOTE: storing the bp in the bvary[] basically sets
3106 * it up for a commit operation.
3108 * We must call vfs_busy_pages() now so the commit operation
3109 * is interlocked with user modifications to memory mapped
3112 * Note: to avoid loopback deadlocks, we do not
3113 * assign b_runningbufspace.
3115 bp->b_cmd = BUF_CMD_WRITE;
3116 vfs_busy_pages(bp->b_vp, bp);
3117 info->bvary[info->bvsize] = bp;
3118 toff = bp->b_bio2.bio_offset + bp->b_dirtyoff;
3119 if (info->bvsize == 0 || toff < info->beg_off)
3120 info->beg_off = toff;
3121 toff += (off_t)(bp->b_dirtyend - bp->b_dirtyoff);
3122 if (info->bvsize == 0 || toff > info->end_off)
3123 info->end_off = toff;
3125 if (info->bvsize == NFS_COMMITBVECSIZ) {
3126 error = nfs_flush_docommit(info, 0);
3127 KKASSERT(info->bvsize == 0);
3136 nfs_flush_docommit(struct nfs_flush_info *info, int error)
3146 if (info->bvsize > 0) {
3148 * Commit data on the server, as required. Note that
3149 * nfs_commit will use the vnode's cred for the commit.
3150 * The NFSv3 commit RPC is limited to a 32 bit byte count.
3152 bytes = info->end_off - info->beg_off;
3153 if (bytes > 0x40000000)
3158 retv = nfs_commit(vp, info->beg_off,
3159 (int)bytes, info->td);
3160 if (retv == NFSERR_STALEWRITEVERF)
3161 nfs_clearcommit(vp->v_mount);
3165 * Now, either mark the blocks I/O done or mark the
3166 * blocks dirty, depending on whether the commit
3169 for (i = 0; i < info->bvsize; ++i) {
3170 bp = info->bvary[i];
3171 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
3174 * Error, leave B_DELWRI intact
3176 vfs_unbusy_pages(bp);
3177 bp->b_cmd = BUF_CMD_DONE;
3181 * Success, remove B_DELWRI ( bundirty() ).
3183 * b_dirtyoff/b_dirtyend seem to be NFS
3184 * specific. We should probably move that
3185 * into bundirty(). XXX
3187 * We are faking an I/O write, we have to
3188 * start the transaction in order to
3189 * immediately biodone() it.
3192 bp->b_flags |= B_ASYNC;
3194 bp->b_flags &= ~B_ERROR;
3195 bp->b_dirtyoff = bp->b_dirtyend = 0;
3197 biodone(&bp->b_bio1);
3206 * NFS advisory byte-level locks.
3207 * Currently unsupported.
3209 * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl,
3213 nfs_advlock(struct vop_advlock_args *ap)
3215 struct nfsnode *np = VTONFS(ap->a_vp);
3218 * The following kludge is to allow diskless support to work
3219 * until a real NFS lockd is implemented. Basically, just pretend
3220 * that this is a local lock.
3222 return (lf_advlock(ap, &(np->n_lockf), np->n_size));
3226 * Print out the contents of an nfsnode.
3228 * nfs_print(struct vnode *a_vp)
3231 nfs_print(struct vop_print_args *ap)
3233 struct vnode *vp = ap->a_vp;
3234 struct nfsnode *np = VTONFS(vp);
3236 kprintf("tag VT_NFS, fileid %lld fsid 0x%x",
3237 np->n_vattr.va_fileid, np->n_vattr.va_fsid);
3238 if (vp->v_type == VFIFO)
3245 * nfs special file access vnode op.
3246 * Essentially just get vattr and then imitate iaccess() since the device is
3247 * local to the client.
3249 * nfsspec_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
3252 nfsspec_access(struct vop_access_args *ap)
3256 struct ucred *cred = ap->a_cred;
3257 struct vnode *vp = ap->a_vp;
3258 mode_t mode = ap->a_mode;
3264 * Disallow write attempts on filesystems mounted read-only;
3265 * unless the file is a socket, fifo, or a block or character
3266 * device resident on the filesystem.
3268 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3269 switch (vp->v_type) {
3279 * If you're the super-user,
3280 * you always get access.
3282 if (cred->cr_uid == 0)
3285 error = VOP_GETATTR(vp, vap);
3289 * Access check is based on only one of owner, group, public.
3290 * If not owner, then check group. If not a member of the
3291 * group, then check public access.
3293 if (cred->cr_uid != vap->va_uid) {
3295 gp = cred->cr_groups;
3296 for (i = 0; i < cred->cr_ngroups; i++, gp++)
3297 if (vap->va_gid == *gp)
3303 error = (vap->va_mode & mode) == mode ? 0 : EACCES;
3308 * Read wrapper for special devices.
3310 * nfsspec_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3311 * struct ucred *a_cred)
3314 nfsspec_read(struct vop_read_args *ap)
3316 struct nfsnode *np = VTONFS(ap->a_vp);
3322 getnanotime(&np->n_atim);
3323 return (VOCALL(&spec_vnode_vops, &ap->a_head));
3327 * Write wrapper for special devices.
3329 * nfsspec_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3330 * struct ucred *a_cred)
3333 nfsspec_write(struct vop_write_args *ap)
3335 struct nfsnode *np = VTONFS(ap->a_vp);
3341 getnanotime(&np->n_mtim);
3342 return (VOCALL(&spec_vnode_vops, &ap->a_head));
3346 * Close wrapper for special devices.
3348 * Update the times on the nfsnode then do device close.
3350 * nfsspec_close(struct vnode *a_vp, int a_fflag)
3353 nfsspec_close(struct vop_close_args *ap)
3355 struct vnode *vp = ap->a_vp;
3356 struct nfsnode *np = VTONFS(vp);
3359 if (np->n_flag & (NACC | NUPD)) {
3361 if (vp->v_sysref.refcnt == 1 &&
3362 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3364 if (np->n_flag & NACC)
3365 vattr.va_atime = np->n_atim;
3366 if (np->n_flag & NUPD)
3367 vattr.va_mtime = np->n_mtim;
3368 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE));
3371 return (VOCALL(&spec_vnode_vops, &ap->a_head));
3375 * Read wrapper for fifos.
3377 * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3378 * struct ucred *a_cred)
3381 nfsfifo_read(struct vop_read_args *ap)
3383 struct nfsnode *np = VTONFS(ap->a_vp);
3389 getnanotime(&np->n_atim);
3390 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
3394 * Write wrapper for fifos.
3396 * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3397 * struct ucred *a_cred)
3400 nfsfifo_write(struct vop_write_args *ap)
3402 struct nfsnode *np = VTONFS(ap->a_vp);
3408 getnanotime(&np->n_mtim);
3409 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
3413 * Close wrapper for fifos.
3415 * Update the times on the nfsnode then do fifo close.
3417 * nfsfifo_close(struct vnode *a_vp, int a_fflag)
3420 nfsfifo_close(struct vop_close_args *ap)
3422 struct vnode *vp = ap->a_vp;
3423 struct nfsnode *np = VTONFS(vp);
3427 if (np->n_flag & (NACC | NUPD)) {
3429 if (np->n_flag & NACC)
3431 if (np->n_flag & NUPD)
3434 if (vp->v_sysref.refcnt == 1 &&
3435 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3437 if (np->n_flag & NACC)
3438 vattr.va_atime = np->n_atim;
3439 if (np->n_flag & NUPD)
3440 vattr.va_mtime = np->n_mtim;
3441 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE));
3444 return (VOCALL(&fifo_vnode_vops, &ap->a_head));