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>
73 #include <vfs/fifofs/fifo.h>
74 #include <vfs/ufs/dir.h>
84 #include "nfsm_subs.h"
87 #include <netinet/in.h>
88 #include <netinet/in_var.h>
90 #include <sys/thread2.h>
96 static int nfsfifo_read (struct vop_read_args *);
97 static int nfsfifo_write (struct vop_write_args *);
98 static int nfsfifo_close (struct vop_close_args *);
99 static int nfs_setattrrpc (struct vnode *,struct vattr *,struct ucred *,struct thread *);
100 static int nfs_lookup (struct vop_old_lookup_args *);
101 static int nfs_create (struct vop_old_create_args *);
102 static int nfs_mknod (struct vop_old_mknod_args *);
103 static int nfs_open (struct vop_open_args *);
104 static int nfs_close (struct vop_close_args *);
105 static int nfs_access (struct vop_access_args *);
106 static int nfs_getattr (struct vop_getattr_args *);
107 static int nfs_setattr (struct vop_setattr_args *);
108 static int nfs_read (struct vop_read_args *);
109 static int nfs_mmap (struct vop_mmap_args *);
110 static int nfs_fsync (struct vop_fsync_args *);
111 static int nfs_remove (struct vop_old_remove_args *);
112 static int nfs_link (struct vop_old_link_args *);
113 static int nfs_rename (struct vop_old_rename_args *);
114 static int nfs_mkdir (struct vop_old_mkdir_args *);
115 static int nfs_rmdir (struct vop_old_rmdir_args *);
116 static int nfs_symlink (struct vop_old_symlink_args *);
117 static int nfs_readdir (struct vop_readdir_args *);
118 static int nfs_bmap (struct vop_bmap_args *);
119 static int nfs_strategy (struct vop_strategy_args *);
120 static int nfs_lookitup (struct vnode *, const char *, int,
121 struct ucred *, struct thread *, struct nfsnode **);
122 static int nfs_sillyrename (struct vnode *,struct vnode *,struct componentname *);
123 static int nfs_laccess (struct vop_access_args *);
124 static int nfs_readlink (struct vop_readlink_args *);
125 static int nfs_print (struct vop_print_args *);
126 static int nfs_advlock (struct vop_advlock_args *);
128 static int nfs_nresolve (struct vop_nresolve_args *);
130 * Global vfs data structures for nfs
132 struct vop_ops nfsv2_vnode_vops = {
133 .vop_default = vop_defaultop,
134 .vop_access = nfs_access,
135 .vop_advlock = nfs_advlock,
136 .vop_bmap = nfs_bmap,
137 .vop_close = nfs_close,
138 .vop_old_create = nfs_create,
139 .vop_fsync = nfs_fsync,
140 .vop_getattr = nfs_getattr,
141 .vop_getpages = vop_stdgetpages,
142 .vop_putpages = vop_stdputpages,
143 .vop_inactive = nfs_inactive,
144 .vop_old_link = nfs_link,
145 .vop_old_lookup = nfs_lookup,
146 .vop_old_mkdir = nfs_mkdir,
147 .vop_old_mknod = nfs_mknod,
148 .vop_mmap = nfs_mmap,
149 .vop_open = nfs_open,
150 .vop_print = nfs_print,
151 .vop_read = nfs_read,
152 .vop_readdir = nfs_readdir,
153 .vop_readlink = nfs_readlink,
154 .vop_reclaim = nfs_reclaim,
155 .vop_old_remove = nfs_remove,
156 .vop_old_rename = nfs_rename,
157 .vop_old_rmdir = nfs_rmdir,
158 .vop_setattr = nfs_setattr,
159 .vop_strategy = nfs_strategy,
160 .vop_old_symlink = nfs_symlink,
161 .vop_write = nfs_write,
162 .vop_nresolve = nfs_nresolve
166 * Special device vnode ops
168 struct vop_ops nfsv2_spec_vops = {
169 .vop_default = vop_defaultop,
170 .vop_access = nfs_laccess,
171 .vop_close = nfs_close,
172 .vop_fsync = nfs_fsync,
173 .vop_getattr = nfs_getattr,
174 .vop_inactive = nfs_inactive,
175 .vop_print = nfs_print,
176 .vop_read = vop_stdnoread,
177 .vop_reclaim = nfs_reclaim,
178 .vop_setattr = nfs_setattr,
179 .vop_write = vop_stdnowrite
182 struct vop_ops nfsv2_fifo_vops = {
183 .vop_default = fifo_vnoperate,
184 .vop_access = nfs_laccess,
185 .vop_close = nfsfifo_close,
186 .vop_fsync = nfs_fsync,
187 .vop_getattr = nfs_getattr,
188 .vop_inactive = nfs_inactive,
189 .vop_print = nfs_print,
190 .vop_read = nfsfifo_read,
191 .vop_reclaim = nfs_reclaim,
192 .vop_setattr = nfs_setattr,
193 .vop_write = nfsfifo_write
196 static int nfs_mknodrpc (struct vnode *dvp, struct vnode **vpp,
197 struct componentname *cnp,
199 static int nfs_removerpc (struct vnode *dvp, const char *name,
201 struct ucred *cred, struct thread *td);
202 static int nfs_renamerpc (struct vnode *fdvp, const char *fnameptr,
203 int fnamelen, struct vnode *tdvp,
204 const char *tnameptr, int tnamelen,
205 struct ucred *cred, struct thread *td);
206 static int nfs_renameit (struct vnode *sdvp,
207 struct componentname *scnp,
208 struct sillyrename *sp);
210 SYSCTL_DECL(_vfs_nfs);
212 static int nfs_flush_on_rename = 1;
213 SYSCTL_INT(_vfs_nfs, OID_AUTO, flush_on_rename, CTLFLAG_RW,
214 &nfs_flush_on_rename, 0, "flush fvp prior to rename");
215 static int nfs_flush_on_hlink = 0;
216 SYSCTL_INT(_vfs_nfs, OID_AUTO, flush_on_hlink, CTLFLAG_RW,
217 &nfs_flush_on_hlink, 0, "flush fvp prior to hard link");
219 static int nfsaccess_cache_timeout = NFS_DEFATTRTIMO;
220 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
221 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
223 static int nfsneg_cache_timeout = NFS_MINATTRTIMO;
224 SYSCTL_INT(_vfs_nfs, OID_AUTO, neg_cache_timeout, CTLFLAG_RW,
225 &nfsneg_cache_timeout, 0, "NFS NEGATIVE NAMECACHE timeout");
227 static int nfspos_cache_timeout = NFS_MINATTRTIMO;
228 SYSCTL_INT(_vfs_nfs, OID_AUTO, pos_cache_timeout, CTLFLAG_RW,
229 &nfspos_cache_timeout, 0, "NFS POSITIVE NAMECACHE timeout");
231 static int nfsv3_commit_on_close = 0;
232 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
233 &nfsv3_commit_on_close, 0, "write+commit on close, else only write");
235 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
236 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
238 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
239 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
242 #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \
243 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \
244 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP)
247 * Returns whether a name component is a degenerate '.' or '..'.
251 nlcdegenerate(struct nlcomponent *nlc)
253 if (nlc->nlc_namelen == 1 && nlc->nlc_nameptr[0] == '.')
255 if (nlc->nlc_namelen == 2 &&
256 nlc->nlc_nameptr[0] == '.' && nlc->nlc_nameptr[1] == '.')
262 nfs3_access_otw(struct vnode *vp, int wmode,
263 struct thread *td, struct ucred *cred)
265 struct nfsnode *np = VTONFS(vp);
270 struct nfsm_info info;
275 nfsstats.rpccnt[NFSPROC_ACCESS]++;
276 nfsm_reqhead(&info, vp, NFSPROC_ACCESS,
277 NFSX_FH(info.v3) + NFSX_UNSIGNED);
278 ERROROUT(nfsm_fhtom(&info, vp));
279 tl = nfsm_build(&info, NFSX_UNSIGNED);
280 *tl = txdr_unsigned(wmode);
281 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_ACCESS, td, cred, &error));
282 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, NFS_LATTR_NOSHRINK));
284 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
285 rmode = fxdr_unsigned(u_int32_t, *tl);
287 np->n_modeuid = cred->cr_uid;
288 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)
308 struct vnode *vp = ap->a_vp;
309 thread_t td = curthread;
311 u_int32_t mode, wmode;
312 struct nfsnode *np = VTONFS(vp);
313 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
314 int v3 = NFS_ISV3(vp);
316 lwkt_gettoken(&nmp->nm_token);
319 * Disallow write attempts on filesystems mounted read-only;
320 * unless the file is a socket, fifo, or a block or character
321 * device resident on the filesystem.
323 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
324 switch (vp->v_type) {
328 lwkt_reltoken(&nmp->nm_token);
336 * The NFS protocol passes only the effective uid/gid over the wire but
337 * we need to check access against real ids if AT_EACCESS not set.
338 * Handle this case by cloning the credentials and setting the
339 * effective ids to the real ones.
341 if (ap->a_flags & AT_EACCESS) {
342 cred = crhold(ap->a_cred);
344 cred = crdup(ap->a_cred);
345 cred->cr_uid = cred->cr_ruid;
346 cred->cr_gid = cred->cr_rgid;
350 * For nfs v3, check to see if we have done this recently, and if
351 * so return our cached result instead of making an ACCESS call.
352 * If not, do an access rpc, otherwise you are stuck emulating
353 * ufs_access() locally using the vattr. This may not be correct,
354 * since the server may apply other access criteria such as
355 * client uid-->server uid mapping that we do not know about.
358 if (ap->a_mode & VREAD)
359 mode = NFSV3ACCESS_READ;
362 if (vp->v_type != VDIR) {
363 if (ap->a_mode & VWRITE)
364 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
365 if (ap->a_mode & VEXEC)
366 mode |= NFSV3ACCESS_EXECUTE;
368 if (ap->a_mode & VWRITE)
369 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
371 if (ap->a_mode & VEXEC)
372 mode |= NFSV3ACCESS_LOOKUP;
374 /* XXX safety belt, only make blanket request if caching */
375 if (nfsaccess_cache_timeout > 0) {
376 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY |
377 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE |
378 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP;
384 * Does our cached result allow us to give a definite yes to
387 if (np->n_modestamp &&
388 (mycpu->gd_time_seconds < (np->n_modestamp + nfsaccess_cache_timeout)) &&
389 (cred->cr_uid == np->n_modeuid) &&
390 ((np->n_mode & mode) == mode)) {
391 nfsstats.accesscache_hits++;
394 * Either a no, or a don't know. Go to the wire.
396 nfsstats.accesscache_misses++;
397 error = nfs3_access_otw(vp, wmode, td, cred);
399 if ((np->n_mode & mode) != mode) {
405 if ((error = nfs_laccess(ap)) != 0) {
407 lwkt_reltoken(&nmp->nm_token);
412 * Attempt to prevent a mapped root from accessing a file
413 * which it shouldn't. We try to read a byte from the file
414 * if the user is root and the file is not zero length.
415 * After calling nfs_laccess, we should have the correct
418 if (cred->cr_uid == 0 && (ap->a_mode & VREAD)
419 && VTONFS(vp)->n_size > 0) {
426 auio.uio_iov = &aiov;
430 auio.uio_segflg = UIO_SYSSPACE;
431 auio.uio_rw = UIO_READ;
434 if (vp->v_type == VREG) {
435 error = nfs_readrpc_uio(vp, &auio);
436 } else if (vp->v_type == VDIR) {
438 bp = kmalloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
440 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
441 error = nfs_readdirrpc_uio(vp, &auio);
443 } else if (vp->v_type == VLNK) {
444 error = nfs_readlinkrpc_uio(vp, &auio);
451 * [re]record creds for reading and/or writing if access
452 * was granted. Assume the NFS server will grant read access
453 * for execute requests.
456 if ((ap->a_mode & (VREAD|VEXEC)) && cred != np->n_rucred) {
459 crfree(np->n_rucred);
462 if ((ap->a_mode & VWRITE) && cred != np->n_wucred) {
465 crfree(np->n_wucred);
469 lwkt_reltoken(&nmp->nm_token);
476 * Check to see if the type is ok
477 * and that deletion is not in progress.
478 * For paged in text files, you will need to flush the page cache
479 * if consistency is lost.
481 * nfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
486 nfs_open(struct vop_open_args *ap)
488 struct vnode *vp = ap->a_vp;
489 struct nfsnode *np = VTONFS(vp);
490 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
494 lwkt_gettoken(&nmp->nm_token);
496 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
498 kprintf("open eacces vtyp=%d\n",vp->v_type);
500 lwkt_reltoken(&nmp->nm_token);
505 * Save valid creds for reading and writing for later RPCs.
507 if ((ap->a_mode & FREAD) && ap->a_cred != np->n_rucred) {
510 crfree(np->n_rucred);
511 np->n_rucred = ap->a_cred;
513 if ((ap->a_mode & FWRITE) && ap->a_cred != np->n_wucred) {
516 crfree(np->n_wucred);
517 np->n_wucred = ap->a_cred;
521 * Clear the attribute cache only if opening with write access. It
522 * is unclear if we should do this at all here, but we certainly
523 * should not clear the cache unconditionally simply because a file
526 if (ap->a_mode & FWRITE)
530 * For normal NFS, reconcile changes made locally verses
531 * changes made remotely. Note that VOP_GETATTR only goes
532 * to the wire if the cached attribute has timed out or been
535 * If local modifications have been made clear the attribute
536 * cache to force an attribute and modified time check. If
537 * GETATTR detects that the file has been changed by someone
538 * other then us it will set NRMODIFIED.
540 * If we are opening a directory and local changes have been
541 * made we have to invalidate the cache in order to ensure
542 * that we get the most up-to-date information from the
545 if (np->n_flag & NLMODIFIED) {
547 if (vp->v_type == VDIR) {
548 error = nfs_vinvalbuf(vp, V_SAVE, 1);
554 error = VOP_GETATTR(vp, &vattr);
556 lwkt_reltoken(&nmp->nm_token);
559 if (np->n_flag & NRMODIFIED) {
560 if (vp->v_type == VDIR)
562 error = nfs_vinvalbuf(vp, V_SAVE, 1);
563 if (error == EINTR) {
564 lwkt_reltoken(&nmp->nm_token);
567 np->n_flag &= ~NRMODIFIED;
569 error = vop_stdopen(ap);
570 lwkt_reltoken(&nmp->nm_token);
577 * What an NFS client should do upon close after writing is a debatable issue.
578 * Most NFS clients push delayed writes to the server upon close, basically for
580 * 1 - So that any write errors may be reported back to the client process
581 * doing the close system call. By far the two most likely errors are
582 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
583 * 2 - To put a worst case upper bound on cache inconsistency between
584 * multiple clients for the file.
585 * There is also a consistency problem for Version 2 of the protocol w.r.t.
586 * not being able to tell if other clients are writing a file concurrently,
587 * since there is no way of knowing if the changed modify time in the reply
588 * is only due to the write for this client.
589 * (NFS Version 3 provides weak cache consistency data in the reply that
590 * should be sufficient to detect and handle this case.)
592 * The current code does the following:
593 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
594 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
595 * or commit them (this satisfies 1 and 2 except for the
596 * case where the server crashes after this close but
597 * before the commit RPC, which is felt to be "good
598 * enough". Changing the last argument to nfs_flush() to
599 * a 1 would force a commit operation, if it is felt a
600 * commit is necessary now.
601 * for NQNFS - do nothing now, since 2 is dealt with via leases and
602 * 1 should be dealt with via an fsync() system call for
603 * cases where write errors are important.
605 * nfs_close(struct vnode *a_vp, int a_fflag)
609 nfs_close(struct vop_close_args *ap)
611 struct vnode *vp = ap->a_vp;
612 struct nfsnode *np = VTONFS(vp);
613 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
615 thread_t td = curthread;
617 lwkt_gettoken(&nmp->nm_token);
619 if (vp->v_type == VREG) {
620 if (np->n_flag & NLMODIFIED) {
623 * Under NFSv3 we have dirty buffers to dispose of. We
624 * must flush them to the NFS server. We have the option
625 * of waiting all the way through the commit rpc or just
626 * waiting for the initial write. The default is to only
627 * wait through the initial write so the data is in the
628 * server's cache, which is roughly similar to the state
629 * a standard disk subsystem leaves the file in on close().
631 * We cannot clear the NLMODIFIED bit in np->n_flag due to
632 * potential races with other processes, and certainly
633 * cannot clear it if we don't commit.
635 int cm = nfsv3_commit_on_close ? 1 : 0;
636 error = nfs_flush(vp, MNT_WAIT, td, cm);
637 /* np->n_flag &= ~NLMODIFIED; */
639 error = nfs_vinvalbuf(vp, V_SAVE, 1);
643 if (np->n_flag & NWRITEERR) {
644 np->n_flag &= ~NWRITEERR;
649 lwkt_reltoken(&nmp->nm_token);
655 * nfs getattr call from vfs.
657 * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap)
660 nfs_getattr(struct vop_getattr_args *ap)
662 struct vnode *vp = ap->a_vp;
663 struct nfsnode *np = VTONFS(vp);
664 struct nfsmount *nmp;
666 thread_t td = curthread;
667 struct nfsm_info info;
670 info.v3 = NFS_ISV3(vp);
671 nmp = VFSTONFS(vp->v_mount);
673 lwkt_gettoken(&nmp->nm_token);
676 * Update local times for special files.
678 if (np->n_flag & (NACC | NUPD))
681 * First look in the cache.
683 if (nfs_getattrcache(vp, ap->a_vap) == 0)
686 if (info.v3 && nfsaccess_cache_timeout > 0) {
687 nfsstats.accesscache_misses++;
688 nfs3_access_otw(vp, NFSV3ACCESS_ALL, td, nfs_vpcred(vp, ND_CHECK));
689 if (nfs_getattrcache(vp, ap->a_vap) == 0)
693 nfsstats.rpccnt[NFSPROC_GETATTR]++;
694 nfsm_reqhead(&info, vp, NFSPROC_GETATTR, NFSX_FH(info.v3));
695 ERROROUT(nfsm_fhtom(&info, vp));
696 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_GETATTR, td,
697 nfs_vpcred(vp, ND_CHECK), &error));
699 ERROROUT(nfsm_loadattr(&info, vp, ap->a_vap));
705 * NFS doesn't support chflags flags. If the nfs mount was
706 * made -o cache set the UF_CACHE bit for swapcache.
708 if ((nmp->nm_flag & NFSMNT_CACHE) && (vp->v_flag & VROOT))
709 ap->a_vap->va_flags |= UF_CACHE;
711 lwkt_reltoken(&nmp->nm_token);
718 * nfs_setattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred)
721 nfs_setattr(struct vop_setattr_args *ap)
723 struct vnode *vp = ap->a_vp;
724 struct nfsnode *np = VTONFS(vp);
725 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
726 struct vattr *vap = ap->a_vap;
727 int biosize = vp->v_mount->mnt_stat.f_iosize;
731 thread_t td = curthread;
737 * Setting of flags is not supported.
739 if (vap->va_flags != VNOVAL)
743 * Disallow write attempts if the filesystem is mounted read-only.
745 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
746 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
747 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
748 (vp->v_mount->mnt_flag & MNT_RDONLY))
751 lwkt_gettoken(&nmp->nm_token);
753 if (vap->va_size != VNOVAL) {
755 * truncation requested
757 switch (vp->v_type) {
759 lwkt_reltoken(&nmp->nm_token);
765 if (vap->va_mtime.tv_sec == VNOVAL &&
766 vap->va_atime.tv_sec == VNOVAL &&
767 vap->va_mode == (mode_t)VNOVAL &&
768 vap->va_uid == (uid_t)VNOVAL &&
769 vap->va_gid == (gid_t)VNOVAL) {
770 lwkt_reltoken(&nmp->nm_token);
773 vap->va_size = VNOVAL;
777 * Disallow write attempts if the filesystem is
780 if (vp->v_mount->mnt_flag & MNT_RDONLY) {
781 lwkt_reltoken(&nmp->nm_token);
787 boff = (int)vap->va_size & (biosize - 1);
788 error = nfs_meta_setsize(vp, td, vap->va_size, 0);
791 if (np->n_flag & NLMODIFIED) {
792 if (vap->va_size == 0)
793 error = nfs_vinvalbuf(vp, 0, 1);
795 error = nfs_vinvalbuf(vp, V_SAVE, 1);
799 * note: this loop case almost always happens at
800 * least once per truncation.
802 if (error == 0 && np->n_size != vap->va_size)
804 np->n_vattr.va_size = vap->va_size;
807 } else if ((np->n_flag & NLMODIFIED) && vp->v_type == VREG) {
809 * What to do. If we are modifying the mtime we lose
810 * mtime detection of changes made by the server or other
811 * clients. But programs like rsync/rdist/cpdup are going
812 * to call utimes a lot. We don't want to piecemeal sync.
814 * For now sync if any prior remote changes were detected,
815 * but allow us to lose track of remote changes made during
816 * the utimes operation.
818 if (np->n_flag & NRMODIFIED)
819 error = nfs_vinvalbuf(vp, V_SAVE, 1);
823 if (vap->va_mtime.tv_sec != VNOVAL) {
824 np->n_mtime = vap->va_mtime.tv_sec;
828 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
831 * Sanity check if a truncation was issued. This should only occur
832 * if multiple processes are racing on the same file.
834 if (error == 0 && vap->va_size != VNOVAL &&
835 np->n_size != vap->va_size) {
836 kprintf("NFS ftruncate: server disagrees on the file size: "
839 (intmax_t)vap->va_size,
840 (intmax_t)np->n_size);
843 if (error && vap->va_size != VNOVAL) {
844 np->n_size = np->n_vattr.va_size = tsize;
845 nfs_meta_setsize(vp, td, np->n_size, 0);
847 lwkt_reltoken(&nmp->nm_token);
853 * Do an nfs setattr rpc.
856 nfs_setattrrpc(struct vnode *vp, struct vattr *vap,
857 struct ucred *cred, struct thread *td)
859 struct nfsv2_sattr *sp;
860 struct nfsnode *np = VTONFS(vp);
862 int error = 0, wccflag = NFSV3_WCCRATTR;
863 struct nfsm_info info;
866 info.v3 = NFS_ISV3(vp);
868 nfsstats.rpccnt[NFSPROC_SETATTR]++;
869 nfsm_reqhead(&info, vp, NFSPROC_SETATTR,
870 NFSX_FH(info.v3) + NFSX_SATTR(info.v3));
871 ERROROUT(nfsm_fhtom(&info, vp));
873 nfsm_v3attrbuild(&info, vap, TRUE);
874 tl = nfsm_build(&info, NFSX_UNSIGNED);
877 sp = nfsm_build(&info, NFSX_V2SATTR);
878 if (vap->va_mode == (mode_t)VNOVAL)
879 sp->sa_mode = nfs_xdrneg1;
881 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
882 if (vap->va_uid == (uid_t)VNOVAL)
883 sp->sa_uid = nfs_xdrneg1;
885 sp->sa_uid = txdr_unsigned(vap->va_uid);
886 if (vap->va_gid == (gid_t)VNOVAL)
887 sp->sa_gid = nfs_xdrneg1;
889 sp->sa_gid = txdr_unsigned(vap->va_gid);
890 sp->sa_size = txdr_unsigned(vap->va_size);
891 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
892 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
894 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_SETATTR, td, cred, &error));
897 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag));
899 ERROROUT(nfsm_loadattr(&info, vp, NULL));
909 nfs_cache_setvp(struct nchandle *nch, struct vnode *vp, int nctimeout)
915 cache_setvp(nch, vp);
916 cache_settimeout(nch, nctimeout);
920 * NEW API CALL - replaces nfs_lookup(). However, we cannot remove
921 * nfs_lookup() until all remaining new api calls are implemented.
923 * Resolve a namecache entry. This function is passed a locked ncp and
924 * must call nfs_cache_setvp() on it as appropriate to resolve the entry.
927 nfs_nresolve(struct vop_nresolve_args *ap)
929 struct thread *td = curthread;
930 struct namecache *ncp;
931 struct nfsmount *nmp;
942 struct nfsm_info info;
946 nmp = VFSTONFS(dvp->v_mount);
948 lwkt_gettoken(&nmp->nm_token);
950 if ((error = vget(dvp, LK_SHARED)) != 0) {
951 lwkt_reltoken(&nmp->nm_token);
956 info.v3 = NFS_ISV3(dvp);
959 nfsstats.lookupcache_misses++;
960 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
961 ncp = ap->a_nch->ncp;
963 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP,
964 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len));
965 ERROROUT(nfsm_fhtom(&info, dvp));
966 ERROROUT(nfsm_strtom(&info, ncp->nc_name, len, NFS_MAXNAMLEN));
967 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, td,
968 ap->a_cred, &error));
971 * Cache negatve lookups to reduce NFS traffic, but use
972 * a fast timeout. Otherwise use a timeout of 1 tick.
973 * XXX we should add a namecache flag for no-caching
974 * to uncache the negative hit as soon as possible, but
975 * we cannot simply destroy the entry because it is used
976 * as a placeholder by the caller.
978 * The refactored nfs code will overwrite a non-zero error
979 * with 0 when we use ERROROUT(), so don't here.
982 nfs_cache_setvp(ap->a_nch, NULL, nfsneg_cache_timeout);
983 tmp_error = nfsm_postop_attr(&info, dvp, &attrflag,
995 * Success, get the file handle, do various checks, and load
996 * post-operation data from the reply packet. Theoretically
997 * we should never be looking up "." so, theoretically, we
998 * should never get the same file handle as our directory. But
999 * we check anyway. XXX
1001 * Note that no timeout is set for the positive cache hit. We
1002 * assume, theoretically, that ESTALE returns will be dealt with
1003 * properly to handle NFS races and in anycase we cannot depend
1004 * on a timeout to deal with NFS open/create/excl issues so instead
1005 * of a bad hack here the rest of the NFS client code needs to do
1008 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp));
1011 if (NFS_CMPFH(np, fhp, fhsize)) {
1015 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1020 lwkt_reltoken(&nmp->nm_token);
1026 ERROROUT(nfsm_postop_attr(&info, nvp, &attrflag,
1027 NFS_LATTR_NOSHRINK));
1028 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag,
1029 NFS_LATTR_NOSHRINK));
1031 ERROROUT(nfsm_loadattr(&info, nvp, NULL));
1033 nfs_cache_setvp(ap->a_nch, nvp, nfspos_cache_timeout);
1037 lwkt_reltoken(&nmp->nm_token);
1049 * 'cached' nfs directory lookup
1051 * NOTE: cannot be removed until NFS implements all the new n*() API calls.
1053 * nfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
1054 * struct componentname *a_cnp)
1057 nfs_lookup(struct vop_old_lookup_args *ap)
1059 struct componentname *cnp = ap->a_cnp;
1060 struct vnode *dvp = ap->a_dvp;
1061 struct vnode **vpp = ap->a_vpp;
1062 int flags = cnp->cn_flags;
1063 struct vnode *newvp;
1064 struct nfsmount *nmp;
1068 int lockparent, wantparent, attrflag, fhsize;
1071 struct nfsm_info info;
1074 info.v3 = NFS_ISV3(dvp);
1078 * Read-only mount check and directory check.
1081 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) &&
1082 (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME))
1085 if (dvp->v_type != VDIR)
1089 * Look it up in the cache. Note that ENOENT is only returned if we
1090 * previously entered a negative hit (see later on). The additional
1091 * nfsneg_cache_timeout check causes previously cached results to
1092 * be instantly ignored if the negative caching is turned off.
1094 lockparent = flags & CNP_LOCKPARENT;
1095 wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT);
1096 nmp = VFSTONFS(dvp->v_mount);
1099 lwkt_gettoken(&nmp->nm_token);
1106 nfsstats.lookupcache_misses++;
1107 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
1108 len = cnp->cn_namelen;
1109 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP,
1110 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len));
1111 ERROROUT(nfsm_fhtom(&info, dvp));
1112 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, len, NFS_MAXNAMLEN));
1113 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, cnp->cn_td,
1114 cnp->cn_cred, &error));
1116 tmp_error = nfsm_postop_attr(&info, dvp, &attrflag,
1117 NFS_LATTR_NOSHRINK);
1127 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp));
1130 * Handle RENAME case...
1132 if (cnp->cn_nameiop == NAMEI_RENAME && wantparent) {
1133 if (NFS_CMPFH(np, fhp, fhsize)) {
1136 lwkt_reltoken(&nmp->nm_token);
1139 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1143 lwkt_reltoken(&nmp->nm_token);
1148 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag,
1149 NFS_LATTR_NOSHRINK));
1150 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag,
1151 NFS_LATTR_NOSHRINK));
1153 ERROROUT(nfsm_loadattr(&info, newvp, NULL));
1160 cnp->cn_flags |= CNP_PDIRUNLOCK;
1162 lwkt_reltoken(&nmp->nm_token);
1166 if (flags & CNP_ISDOTDOT) {
1168 cnp->cn_flags |= CNP_PDIRUNLOCK;
1169 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1171 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
1172 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
1173 lwkt_reltoken(&nmp->nm_token);
1174 return (error); /* NOTE: return error from nget */
1178 error = vn_lock(dvp, LK_EXCLUSIVE);
1181 lwkt_reltoken(&nmp->nm_token);
1184 cnp->cn_flags |= CNP_PDIRUNLOCK;
1186 } else if (NFS_CMPFH(np, fhp, fhsize)) {
1190 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1194 lwkt_reltoken(&nmp->nm_token);
1199 cnp->cn_flags |= CNP_PDIRUNLOCK;
1204 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag,
1205 NFS_LATTR_NOSHRINK));
1206 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag,
1207 NFS_LATTR_NOSHRINK));
1209 ERROROUT(nfsm_loadattr(&info, newvp, NULL));
1212 /* XXX MOVE TO nfs_nremove() */
1213 if ((cnp->cn_flags & CNP_MAKEENTRY) &&
1214 cnp->cn_nameiop != NAMEI_DELETE) {
1215 np->n_ctime = np->n_vattr.va_ctime.tv_sec; /* XXX */
1223 if (newvp != NULLVP) {
1227 if ((cnp->cn_nameiop == NAMEI_CREATE ||
1228 cnp->cn_nameiop == NAMEI_RENAME) &&
1232 cnp->cn_flags |= CNP_PDIRUNLOCK;
1234 if (dvp->v_mount->mnt_flag & MNT_RDONLY)
1237 error = EJUSTRETURN;
1240 lwkt_reltoken(&nmp->nm_token);
1246 * Just call nfs_bioread() to do the work.
1248 * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1249 * struct ucred *a_cred)
1252 nfs_read(struct vop_read_args *ap)
1254 struct vnode *vp = ap->a_vp;
1255 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1258 lwkt_gettoken(&nmp->nm_token);
1259 error = nfs_bioread(vp, ap->a_uio, ap->a_ioflag);
1260 lwkt_reltoken(&nmp->nm_token);
1268 * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
1271 nfs_readlink(struct vop_readlink_args *ap)
1273 struct vnode *vp = ap->a_vp;
1274 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1277 if (vp->v_type != VLNK)
1280 lwkt_gettoken(&nmp->nm_token);
1281 error = nfs_bioread(vp, ap->a_uio, 0);
1282 lwkt_reltoken(&nmp->nm_token);
1288 * Do a readlink rpc.
1289 * Called by nfs_doio() from below the buffer cache.
1292 nfs_readlinkrpc_uio(struct vnode *vp, struct uio *uiop)
1294 int error = 0, len, attrflag;
1295 struct nfsm_info info;
1298 info.v3 = NFS_ISV3(vp);
1300 nfsstats.rpccnt[NFSPROC_READLINK]++;
1301 nfsm_reqhead(&info, vp, NFSPROC_READLINK, NFSX_FH(info.v3));
1302 ERROROUT(nfsm_fhtom(&info, vp));
1303 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READLINK, uiop->uio_td,
1304 nfs_vpcred(vp, ND_CHECK), &error));
1306 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag,
1307 NFS_LATTR_NOSHRINK));
1310 NEGATIVEOUT(len = nfsm_strsiz(&info, NFS_MAXPATHLEN));
1311 if (len == NFS_MAXPATHLEN) {
1312 struct nfsnode *np = VTONFS(vp);
1313 if (np->n_size && np->n_size < NFS_MAXPATHLEN)
1316 ERROROUT(nfsm_mtouio(&info, uiop, len));
1325 * nfs synchronous read rpc using UIO
1328 nfs_readrpc_uio(struct vnode *vp, struct uio *uiop)
1331 struct nfsmount *nmp;
1332 int error = 0, len, retlen, tsiz, eof, attrflag;
1333 struct nfsm_info info;
1337 info.v3 = NFS_ISV3(vp);
1342 nmp = VFSTONFS(vp->v_mount);
1344 tsiz = uiop->uio_resid;
1345 tmp_off = uiop->uio_offset + tsiz;
1346 if (tmp_off > nmp->nm_maxfilesize || tmp_off < uiop->uio_offset)
1348 tmp_off = uiop->uio_offset;
1350 nfsstats.rpccnt[NFSPROC_READ]++;
1351 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
1352 nfsm_reqhead(&info, vp, NFSPROC_READ,
1353 NFSX_FH(info.v3) + NFSX_UNSIGNED * 3);
1354 ERROROUT(nfsm_fhtom(&info, vp));
1355 tl = nfsm_build(&info, NFSX_UNSIGNED * 3);
1357 txdr_hyper(uiop->uio_offset, tl);
1358 *(tl + 2) = txdr_unsigned(len);
1360 *tl++ = txdr_unsigned(uiop->uio_offset);
1361 *tl++ = txdr_unsigned(len);
1364 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READ, uiop->uio_td,
1365 nfs_vpcred(vp, ND_READ), &error));
1367 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag,
1368 NFS_LATTR_NOSHRINK));
1369 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED));
1370 eof = fxdr_unsigned(int, *(tl + 1));
1372 ERROROUT(nfsm_loadattr(&info, vp, NULL));
1374 NEGATIVEOUT(retlen = nfsm_strsiz(&info, len));
1375 ERROROUT(nfsm_mtouio(&info, uiop, retlen));
1380 * Handle short-read from server (NFSv3). If EOF is not
1381 * flagged (and no error occurred), but retlen is less
1382 * then the request size, we must zero-fill the remainder.
1384 if (retlen < len && info.v3 && eof == 0) {
1385 ERROROUT(uiomovez(len - retlen, uiop));
1391 * Terminate loop on EOF or zero-length read.
1393 * For NFSv2 a short-read indicates EOF, not zero-fill,
1394 * and also terminates the loop.
1397 if (eof || retlen == 0)
1399 } else if (retlen < len) {
1411 nfs_writerpc_uio(struct vnode *vp, struct uio *uiop,
1412 int *iomode, int *must_commit)
1416 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1417 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
1418 int committed = NFSV3WRITE_FILESYNC;
1419 struct nfsm_info info;
1422 info.v3 = NFS_ISV3(vp);
1425 if (uiop->uio_iovcnt != 1)
1426 panic("nfs: writerpc iovcnt > 1");
1429 tsiz = uiop->uio_resid;
1430 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1433 nfsstats.rpccnt[NFSPROC_WRITE]++;
1434 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1435 nfsm_reqhead(&info, vp, NFSPROC_WRITE,
1436 NFSX_FH(info.v3) + 5 * NFSX_UNSIGNED +
1438 ERROROUT(nfsm_fhtom(&info, vp));
1440 tl = nfsm_build(&info, 5 * NFSX_UNSIGNED);
1441 txdr_hyper(uiop->uio_offset, tl);
1443 *tl++ = txdr_unsigned(len);
1444 *tl++ = txdr_unsigned(*iomode);
1445 *tl = txdr_unsigned(len);
1449 tl = nfsm_build(&info, 4 * NFSX_UNSIGNED);
1450 /* Set both "begin" and "current" to non-garbage. */
1451 x = txdr_unsigned((u_int32_t)uiop->uio_offset);
1452 *tl++ = x; /* "begin offset" */
1453 *tl++ = x; /* "current offset" */
1454 x = txdr_unsigned(len);
1455 *tl++ = x; /* total to this offset */
1456 *tl = x; /* size of this write */
1458 ERROROUT(nfsm_uiotom(&info, uiop, len));
1459 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_WRITE, uiop->uio_td,
1460 nfs_vpcred(vp, ND_WRITE), &error));
1463 * The write RPC returns a before and after mtime. The
1464 * nfsm_wcc_data() macro checks the before n_mtime
1465 * against the before time and stores the after time
1466 * in the nfsnode's cached vattr and n_mtime field.
1467 * The NRMODIFIED bit will be set if the before
1468 * time did not match the original mtime.
1470 wccflag = NFSV3_WCCCHK;
1471 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag));
1473 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED + NFSX_V3WRITEVERF));
1474 rlen = fxdr_unsigned(int, *tl++);
1480 } else if (rlen < len) {
1481 backup = len - rlen;
1482 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base - backup;
1483 uiop->uio_iov->iov_len += backup;
1484 uiop->uio_offset -= backup;
1485 uiop->uio_resid += backup;
1488 commit = fxdr_unsigned(int, *tl++);
1491 * Return the lowest committment level
1492 * obtained by any of the RPCs.
1494 if (committed == NFSV3WRITE_FILESYNC)
1496 else if (committed == NFSV3WRITE_DATASYNC &&
1497 commit == NFSV3WRITE_UNSTABLE)
1499 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){
1500 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1502 nmp->nm_state |= NFSSTA_HASWRITEVERF;
1503 } else if (bcmp((caddr_t)tl,
1504 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1506 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1511 ERROROUT(nfsm_loadattr(&info, vp, NULL));
1520 if (vp->v_mount->mnt_flag & MNT_ASYNC)
1521 committed = NFSV3WRITE_FILESYNC;
1522 *iomode = committed;
1524 uiop->uio_resid = tsiz;
1530 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1531 * mode set to specify the file type and the size field for rdev.
1534 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1537 struct nfsv2_sattr *sp;
1539 struct vnode *newvp = NULL;
1540 struct nfsnode *np = NULL;
1542 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
1544 struct nfsm_info info;
1547 info.v3 = NFS_ISV3(dvp);
1549 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1550 rmajor = txdr_unsigned(vap->va_rmajor);
1551 rminor = txdr_unsigned(vap->va_rminor);
1552 } else if (vap->va_type == VFIFO || vap->va_type == VSOCK) {
1553 rmajor = nfs_xdrneg1;
1554 rminor = nfs_xdrneg1;
1556 return (EOPNOTSUPP);
1558 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
1561 nfsstats.rpccnt[NFSPROC_MKNOD]++;
1562 nfsm_reqhead(&info, dvp, NFSPROC_MKNOD,
1563 NFSX_FH(info.v3) + 4 * NFSX_UNSIGNED +
1564 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(info.v3));
1565 ERROROUT(nfsm_fhtom(&info, dvp));
1566 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen,
1569 tl = nfsm_build(&info, NFSX_UNSIGNED);
1570 *tl++ = vtonfsv3_type(vap->va_type);
1571 nfsm_v3attrbuild(&info, vap, FALSE);
1572 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1573 tl = nfsm_build(&info, 2 * NFSX_UNSIGNED);
1574 *tl++ = txdr_unsigned(vap->va_rmajor);
1575 *tl = txdr_unsigned(vap->va_rminor);
1578 sp = nfsm_build(&info, NFSX_V2SATTR);
1579 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1580 sp->sa_uid = nfs_xdrneg1;
1581 sp->sa_gid = nfs_xdrneg1;
1582 sp->sa_size = makeudev(rmajor, rminor);
1583 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1584 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1586 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_MKNOD, cnp->cn_td,
1587 cnp->cn_cred, &error));
1589 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp));
1595 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1596 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1602 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag));
1613 VTONFS(dvp)->n_flag |= NLMODIFIED;
1615 VTONFS(dvp)->n_attrstamp = 0;
1621 * just call nfs_mknodrpc() to do the work.
1623 * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
1624 * struct componentname *a_cnp, struct vattr *a_vap)
1628 nfs_mknod(struct vop_old_mknod_args *ap)
1630 struct nfsmount *nmp = VFSTONFS(ap->a_dvp->v_mount);
1633 lwkt_gettoken(&nmp->nm_token);
1634 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1635 lwkt_reltoken(&nmp->nm_token);
1640 static u_long create_verf;
1642 * nfs file create call
1644 * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
1645 * struct componentname *a_cnp, struct vattr *a_vap)
1648 nfs_create(struct vop_old_create_args *ap)
1650 struct vnode *dvp = ap->a_dvp;
1651 struct vattr *vap = ap->a_vap;
1652 struct nfsmount *nmp = VFSTONFS(dvp->v_mount);
1653 struct componentname *cnp = ap->a_cnp;
1654 struct nfsv2_sattr *sp;
1656 struct nfsnode *np = NULL;
1657 struct vnode *newvp = NULL;
1658 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
1660 struct nfsm_info info;
1663 info.v3 = NFS_ISV3(dvp);
1664 lwkt_gettoken(&nmp->nm_token);
1667 * Oops, not for me..
1669 if (vap->va_type == VSOCK) {
1670 error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap);
1671 lwkt_reltoken(&nmp->nm_token);
1675 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
1676 lwkt_reltoken(&nmp->nm_token);
1679 if (vap->va_vaflags & VA_EXCLUSIVE)
1682 nfsstats.rpccnt[NFSPROC_CREATE]++;
1683 nfsm_reqhead(&info, dvp, NFSPROC_CREATE,
1684 NFSX_FH(info.v3) + 2 * NFSX_UNSIGNED +
1685 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(info.v3));
1686 ERROROUT(nfsm_fhtom(&info, dvp));
1687 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen,
1690 tl = nfsm_build(&info, NFSX_UNSIGNED);
1691 if (fmode & O_EXCL) {
1692 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
1693 tl = nfsm_build(&info, NFSX_V3CREATEVERF);
1695 if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid]))
1696 *tl++ = IA_SIN(TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia)->sin_addr.s_addr;
1699 *tl++ = create_verf;
1700 *tl = ++create_verf;
1702 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
1703 nfsm_v3attrbuild(&info, vap, FALSE);
1706 sp = nfsm_build(&info, NFSX_V2SATTR);
1707 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1708 sp->sa_uid = nfs_xdrneg1;
1709 sp->sa_gid = nfs_xdrneg1;
1711 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1712 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1714 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_CREATE, cnp->cn_td,
1715 cnp->cn_cred, &error));
1717 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp));
1723 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1724 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1731 error = nfsm_wcc_data(&info, dvp, &wccflag);
1733 (void)nfsm_wcc_data(&info, dvp, &wccflag);
1739 if (info.v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
1740 KKASSERT(newvp == NULL);
1744 } else if (info.v3 && (fmode & O_EXCL)) {
1746 * We are normally called with only a partially initialized
1747 * VAP. Since the NFSv3 spec says that server may use the
1748 * file attributes to store the verifier, the spec requires
1749 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1750 * in atime, but we can't really assume that all servers will
1751 * so we ensure that our SETATTR sets both atime and mtime.
1753 if (vap->va_mtime.tv_sec == VNOVAL)
1754 vfs_timestamp(&vap->va_mtime);
1755 if (vap->va_atime.tv_sec == VNOVAL)
1756 vap->va_atime = vap->va_mtime;
1757 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td);
1761 * The new np may have enough info for access
1762 * checks, make sure rucred and wucred are
1763 * initialized for read and write rpc's.
1766 if (np->n_rucred == NULL)
1767 np->n_rucred = crhold(cnp->cn_cred);
1768 if (np->n_wucred == NULL)
1769 np->n_wucred = crhold(cnp->cn_cred);
1774 VTONFS(dvp)->n_flag |= NLMODIFIED;
1776 VTONFS(dvp)->n_attrstamp = 0;
1777 lwkt_reltoken(&nmp->nm_token);
1782 * nfs file remove call
1783 * To try and make nfs semantics closer to ufs semantics, a file that has
1784 * other processes using the vnode is renamed instead of removed and then
1785 * removed later on the last close.
1786 * - If v_sysref.refcnt > 1
1787 * If a rename is not already in the works
1788 * call nfs_sillyrename() to set it up
1792 * nfs_remove(struct vnode *a_dvp, struct vnode *a_vp,
1793 * struct componentname *a_cnp)
1796 nfs_remove(struct vop_old_remove_args *ap)
1798 struct vnode *vp = ap->a_vp;
1799 struct vnode *dvp = ap->a_dvp;
1800 struct nfsmount *nmp = VFSTONFS(dvp->v_mount);
1801 struct componentname *cnp = ap->a_cnp;
1802 struct nfsnode *np = VTONFS(vp);
1806 lwkt_gettoken(&nmp->nm_token);
1808 if (vp->v_sysref.refcnt < 1)
1809 panic("nfs_remove: bad v_sysref.refcnt");
1811 if (vp->v_type == VDIR) {
1813 } else if (vp->v_sysref.refcnt == 1 || (np->n_sillyrename &&
1814 VOP_GETATTR(vp, &vattr) == 0 && vattr.va_nlink > 1)) {
1816 * throw away biocache buffers, mainly to avoid
1817 * unnecessary delayed writes later.
1819 error = nfs_vinvalbuf(vp, 0, 1);
1822 error = nfs_removerpc(dvp, cnp->cn_nameptr,
1823 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td);
1825 * Kludge City: If the first reply to the remove rpc is lost..
1826 * the reply to the retransmitted request will be ENOENT
1827 * since the file was in fact removed
1828 * Therefore, we cheat and return success.
1830 if (error == ENOENT)
1832 } else if (!np->n_sillyrename) {
1833 error = nfs_sillyrename(dvp, vp, cnp);
1835 np->n_attrstamp = 0;
1836 lwkt_reltoken(&nmp->nm_token);
1842 * nfs file remove rpc called from nfs_inactive
1845 nfs_removeit(struct sillyrename *sp)
1847 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen,
1852 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1855 nfs_removerpc(struct vnode *dvp, const char *name, int namelen,
1856 struct ucred *cred, struct thread *td)
1858 int error = 0, wccflag = NFSV3_WCCRATTR;
1859 struct nfsm_info info;
1862 info.v3 = NFS_ISV3(dvp);
1864 nfsstats.rpccnt[NFSPROC_REMOVE]++;
1865 nfsm_reqhead(&info, dvp, NFSPROC_REMOVE,
1866 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1867 ERROROUT(nfsm_fhtom(&info, dvp));
1868 ERROROUT(nfsm_strtom(&info, name, namelen, NFS_MAXNAMLEN));
1869 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_REMOVE, td, cred, &error));
1871 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag));
1876 VTONFS(dvp)->n_flag |= NLMODIFIED;
1878 VTONFS(dvp)->n_attrstamp = 0;
1883 * nfs file rename call
1885 * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
1886 * struct componentname *a_fcnp, struct vnode *a_tdvp,
1887 * struct vnode *a_tvp, struct componentname *a_tcnp)
1890 nfs_rename(struct vop_old_rename_args *ap)
1892 struct vnode *fvp = ap->a_fvp;
1893 struct vnode *tvp = ap->a_tvp;
1894 struct vnode *fdvp = ap->a_fdvp;
1895 struct vnode *tdvp = ap->a_tdvp;
1896 struct componentname *tcnp = ap->a_tcnp;
1897 struct componentname *fcnp = ap->a_fcnp;
1898 struct nfsmount *nmp = VFSTONFS(fdvp->v_mount);
1901 lwkt_gettoken(&nmp->nm_token);
1903 /* Check for cross-device rename */
1904 if ((fvp->v_mount != tdvp->v_mount) ||
1905 (tvp && (fvp->v_mount != tvp->v_mount))) {
1911 * We shouldn't have to flush fvp on rename for most server-side
1912 * filesystems as the file handle should not change. Unfortunately
1913 * the inode for some filesystems (msdosfs) might be tied to the
1914 * file name or directory position so to be completely safe
1915 * vfs.nfs.flush_on_rename is set by default. Clear to improve
1918 * We must flush tvp on rename because it might become stale on the
1919 * server after the rename.
1921 if (nfs_flush_on_rename)
1922 VOP_FSYNC(fvp, MNT_WAIT, 0);
1924 VOP_FSYNC(tvp, MNT_WAIT, 0);
1927 * If the tvp exists and is in use, sillyrename it before doing the
1928 * rename of the new file over it.
1930 * XXX Can't sillyrename a directory.
1932 * We do not attempt to do any namecache purges in this old API
1933 * routine. The new API compat functions have access to the actual
1934 * namecache structures and will do it for us.
1936 if (tvp && tvp->v_sysref.refcnt > 1 && !VTONFS(tvp)->n_sillyrename &&
1937 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1944 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1945 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1949 lwkt_reltoken(&nmp->nm_token);
1959 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1961 if (error == ENOENT)
1967 * nfs file rename rpc called from nfs_remove() above
1970 nfs_renameit(struct vnode *sdvp, struct componentname *scnp,
1971 struct sillyrename *sp)
1973 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
1974 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td));
1978 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1981 nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen,
1982 struct vnode *tdvp, const char *tnameptr, int tnamelen,
1983 struct ucred *cred, struct thread *td)
1985 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
1986 struct nfsm_info info;
1989 info.v3 = NFS_ISV3(fdvp);
1991 nfsstats.rpccnt[NFSPROC_RENAME]++;
1992 nfsm_reqhead(&info, fdvp, NFSPROC_RENAME,
1993 (NFSX_FH(info.v3) + NFSX_UNSIGNED)*2 +
1994 nfsm_rndup(fnamelen) + nfsm_rndup(tnamelen));
1995 ERROROUT(nfsm_fhtom(&info, fdvp));
1996 ERROROUT(nfsm_strtom(&info, fnameptr, fnamelen, NFS_MAXNAMLEN));
1997 ERROROUT(nfsm_fhtom(&info, tdvp));
1998 ERROROUT(nfsm_strtom(&info, tnameptr, tnamelen, NFS_MAXNAMLEN));
1999 NEGKEEPOUT(nfsm_request(&info, fdvp, NFSPROC_RENAME, td, cred, &error));
2001 ERROROUT(nfsm_wcc_data(&info, fdvp, &fwccflag));
2002 ERROROUT(nfsm_wcc_data(&info, tdvp, &twccflag));
2007 VTONFS(fdvp)->n_flag |= NLMODIFIED;
2008 VTONFS(tdvp)->n_flag |= NLMODIFIED;
2010 VTONFS(fdvp)->n_attrstamp = 0;
2012 VTONFS(tdvp)->n_attrstamp = 0;
2017 * nfs hard link create call
2019 * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp,
2020 * struct componentname *a_cnp)
2023 nfs_link(struct vop_old_link_args *ap)
2025 struct vnode *vp = ap->a_vp;
2026 struct vnode *tdvp = ap->a_tdvp;
2027 struct nfsmount *nmp = VFSTONFS(tdvp->v_mount);
2028 struct componentname *cnp = ap->a_cnp;
2029 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
2030 struct nfsm_info info;
2032 if (vp->v_mount != tdvp->v_mount) {
2035 lwkt_gettoken(&nmp->nm_token);
2038 * The attribute cache may get out of sync with the server on link.
2039 * Pushing writes to the server before handle was inherited from
2040 * long long ago and it is unclear if we still need to do this.
2043 if (nfs_flush_on_hlink)
2044 VOP_FSYNC(vp, MNT_WAIT, 0);
2047 info.v3 = NFS_ISV3(vp);
2049 nfsstats.rpccnt[NFSPROC_LINK]++;
2050 nfsm_reqhead(&info, vp, NFSPROC_LINK,
2051 NFSX_FH(info.v3) * 2 + NFSX_UNSIGNED +
2052 nfsm_rndup(cnp->cn_namelen));
2053 ERROROUT(nfsm_fhtom(&info, vp));
2054 ERROROUT(nfsm_fhtom(&info, tdvp));
2055 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen,
2057 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_LINK, cnp->cn_td,
2058 cnp->cn_cred, &error));
2060 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag,
2061 NFS_LATTR_NOSHRINK));
2062 ERROROUT(nfsm_wcc_data(&info, tdvp, &wccflag));
2067 VTONFS(tdvp)->n_flag |= NLMODIFIED;
2069 VTONFS(vp)->n_attrstamp = 0;
2071 VTONFS(tdvp)->n_attrstamp = 0;
2073 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
2075 if (error == EEXIST)
2077 lwkt_reltoken(&nmp->nm_token);
2082 * nfs symbolic link create call
2084 * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
2085 * struct componentname *a_cnp, struct vattr *a_vap,
2089 nfs_symlink(struct vop_old_symlink_args *ap)
2091 struct vnode *dvp = ap->a_dvp;
2092 struct vattr *vap = ap->a_vap;
2093 struct nfsmount *nmp = VFSTONFS(dvp->v_mount);
2094 struct componentname *cnp = ap->a_cnp;
2095 struct nfsv2_sattr *sp;
2096 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
2097 struct vnode *newvp = NULL;
2098 struct nfsm_info info;
2101 info.v3 = NFS_ISV3(dvp);
2102 lwkt_gettoken(&nmp->nm_token);
2104 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
2105 slen = strlen(ap->a_target);
2106 nfsm_reqhead(&info, dvp, NFSPROC_SYMLINK,
2107 NFSX_FH(info.v3) + 2*NFSX_UNSIGNED +
2108 nfsm_rndup(cnp->cn_namelen) +
2109 nfsm_rndup(slen) + NFSX_SATTR(info.v3));
2110 ERROROUT(nfsm_fhtom(&info, dvp));
2111 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen,
2114 nfsm_v3attrbuild(&info, vap, FALSE);
2116 ERROROUT(nfsm_strtom(&info, ap->a_target, slen, NFS_MAXPATHLEN));
2118 sp = nfsm_build(&info, NFSX_V2SATTR);
2119 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
2120 sp->sa_uid = nfs_xdrneg1;
2121 sp->sa_gid = nfs_xdrneg1;
2122 sp->sa_size = nfs_xdrneg1;
2123 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
2124 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
2128 * Issue the NFS request and get the rpc response.
2130 * Only NFSv3 responses returning an error of 0 actually return
2131 * a file handle that can be converted into newvp without having
2132 * to do an extra lookup rpc.
2134 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_SYMLINK, cnp->cn_td,
2135 cnp->cn_cred, &error));
2138 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp));
2140 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag));
2144 * out code jumps -> here, mrep is also freed.
2152 * If we get an EEXIST error, silently convert it to no-error
2153 * in case of an NFS retry.
2155 if (error == EEXIST)
2159 * If we do not have (or no longer have) an error, and we could
2160 * not extract the newvp from the response due to the request being
2161 * NFSv2 or the error being EEXIST. We have to do a lookup in order
2162 * to obtain a newvp to return.
2164 if (error == 0 && newvp == NULL) {
2165 struct nfsnode *np = NULL;
2167 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2168 cnp->cn_cred, cnp->cn_td, &np);
2178 VTONFS(dvp)->n_flag |= NLMODIFIED;
2180 VTONFS(dvp)->n_attrstamp = 0;
2181 lwkt_reltoken(&nmp->nm_token);
2189 * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
2190 * struct componentname *a_cnp, struct vattr *a_vap)
2193 nfs_mkdir(struct vop_old_mkdir_args *ap)
2195 struct vnode *dvp = ap->a_dvp;
2196 struct vattr *vap = ap->a_vap;
2197 struct nfsmount *nmp = VFSTONFS(dvp->v_mount);
2198 struct componentname *cnp = ap->a_cnp;
2199 struct nfsv2_sattr *sp;
2200 struct nfsnode *np = NULL;
2201 struct vnode *newvp = NULL;
2203 int error = 0, wccflag = NFSV3_WCCRATTR;
2206 struct nfsm_info info;
2209 info.v3 = NFS_ISV3(dvp);
2210 lwkt_gettoken(&nmp->nm_token);
2212 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
2213 lwkt_reltoken(&nmp->nm_token);
2216 len = cnp->cn_namelen;
2217 nfsstats.rpccnt[NFSPROC_MKDIR]++;
2218 nfsm_reqhead(&info, dvp, NFSPROC_MKDIR,
2219 NFSX_FH(info.v3) + NFSX_UNSIGNED +
2220 nfsm_rndup(len) + NFSX_SATTR(info.v3));
2221 ERROROUT(nfsm_fhtom(&info, dvp));
2222 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, len, NFS_MAXNAMLEN));
2224 nfsm_v3attrbuild(&info, vap, FALSE);
2226 sp = nfsm_build(&info, NFSX_V2SATTR);
2227 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
2228 sp->sa_uid = nfs_xdrneg1;
2229 sp->sa_gid = nfs_xdrneg1;
2230 sp->sa_size = nfs_xdrneg1;
2231 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
2232 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
2234 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_MKDIR, cnp->cn_td,
2235 cnp->cn_cred, &error));
2237 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp));
2240 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag));
2245 VTONFS(dvp)->n_flag |= NLMODIFIED;
2247 VTONFS(dvp)->n_attrstamp = 0;
2249 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
2250 * if we can succeed in looking up the directory.
2252 if (error == EEXIST || (!error && !gotvp)) {
2257 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
2261 if (newvp->v_type != VDIR)
2271 lwkt_reltoken(&nmp->nm_token);
2276 * nfs remove directory call
2278 * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
2279 * struct componentname *a_cnp)
2282 nfs_rmdir(struct vop_old_rmdir_args *ap)
2284 struct vnode *vp = ap->a_vp;
2285 struct vnode *dvp = ap->a_dvp;
2286 struct nfsmount *nmp = VFSTONFS(dvp->v_mount);
2287 struct componentname *cnp = ap->a_cnp;
2288 int error = 0, wccflag = NFSV3_WCCRATTR;
2289 struct nfsm_info info;
2292 info.v3 = NFS_ISV3(dvp);
2297 lwkt_gettoken(&nmp->nm_token);
2299 nfsstats.rpccnt[NFSPROC_RMDIR]++;
2300 nfsm_reqhead(&info, dvp, NFSPROC_RMDIR,
2301 NFSX_FH(info.v3) + NFSX_UNSIGNED +
2302 nfsm_rndup(cnp->cn_namelen));
2303 ERROROUT(nfsm_fhtom(&info, dvp));
2304 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen,
2306 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_RMDIR, cnp->cn_td,
2307 cnp->cn_cred, &error));
2309 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag));
2314 VTONFS(dvp)->n_flag |= NLMODIFIED;
2316 VTONFS(dvp)->n_attrstamp = 0;
2318 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2320 if (error == ENOENT)
2322 lwkt_reltoken(&nmp->nm_token);
2330 * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
2333 nfs_readdir(struct vop_readdir_args *ap)
2335 struct vnode *vp = ap->a_vp;
2336 struct nfsnode *np = VTONFS(vp);
2337 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2338 struct uio *uio = ap->a_uio;
2342 if (vp->v_type != VDIR)
2345 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0)
2348 lwkt_gettoken(&nmp->nm_token);
2351 * If we have a valid EOF offset cache we must call VOP_GETATTR()
2352 * and then check that is still valid, or if this is an NQNFS mount
2353 * we call NQNFS_CKCACHEABLE() instead of VOP_GETATTR(). Note that
2354 * VOP_GETATTR() does not necessarily go to the wire.
2356 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2357 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0) {
2358 if (VOP_GETATTR(vp, &vattr) == 0 &&
2359 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0
2361 nfsstats.direofcache_hits++;
2367 * Call nfs_bioread() to do the real work. nfs_bioread() does its
2368 * own cache coherency checks so we do not have to.
2370 tresid = uio->uio_resid;
2371 error = nfs_bioread(vp, uio, 0);
2373 if (!error && uio->uio_resid == tresid)
2374 nfsstats.direofcache_misses++;
2376 lwkt_reltoken(&nmp->nm_token);
2383 * Readdir rpc call. nfs_bioread->nfs_doio->nfs_readdirrpc.
2385 * Note that for directories, nfs_bioread maintains the underlying nfs-centric
2386 * offset/block and converts the nfs formatted directory entries for userland
2387 * consumption as well as deals with offsets into the middle of blocks.
2388 * nfs_doio only deals with logical blocks. In particular, uio_offset will
2389 * be block-bounded. It must convert to cookies for the actual RPC.
2392 nfs_readdirrpc_uio(struct vnode *vp, struct uio *uiop)
2395 struct nfs_dirent *dp = NULL;
2400 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2401 struct nfsnode *dnp = VTONFS(vp);
2403 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2405 struct nfsm_info info;
2408 info.v3 = NFS_ISV3(vp);
2411 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2412 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2413 panic("nfs readdirrpc bad uio");
2417 * If there is no cookie, assume directory was stale.
2419 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2423 return (NFSERR_BAD_COOKIE);
2425 * Loop around doing readdir rpc's of size nm_readdirsize
2426 * truncated to a multiple of DIRBLKSIZ.
2427 * The stopping criteria is EOF or buffer full.
2429 while (more_dirs && bigenough) {
2430 nfsstats.rpccnt[NFSPROC_READDIR]++;
2431 nfsm_reqhead(&info, vp, NFSPROC_READDIR,
2432 NFSX_FH(info.v3) + NFSX_READDIR(info.v3));
2433 ERROROUT(nfsm_fhtom(&info, vp));
2435 tl = nfsm_build(&info, 5 * NFSX_UNSIGNED);
2436 *tl++ = cookie.nfsuquad[0];
2437 *tl++ = cookie.nfsuquad[1];
2438 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2439 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2442 * WARNING! HAMMER DIRECTORIES WILL NOT WORK WELL
2443 * WITH NFSv2!!! There's nothing I can really do
2444 * about it other than to hope the server supports
2447 tl = nfsm_build(&info, 2 * NFSX_UNSIGNED);
2448 *tl++ = cookie.nfsuquad[0];
2450 *tl = txdr_unsigned(nmp->nm_readdirsize);
2451 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READDIR,
2453 nfs_vpcred(vp, ND_READ), &error));
2455 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag,
2456 NFS_LATTR_NOSHRINK));
2457 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED));
2458 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2459 dnp->n_cookieverf.nfsuquad[1] = *tl;
2461 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
2462 more_dirs = fxdr_unsigned(int, *tl);
2464 /* loop thru the dir entries, converting them to std form */
2465 while (more_dirs && bigenough) {
2467 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
2468 fileno = fxdr_hyper(tl);
2469 len = fxdr_unsigned(int, *(tl + 2));
2471 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED));
2472 fileno = fxdr_unsigned(u_quad_t, *tl++);
2473 len = fxdr_unsigned(int, *tl);
2475 if (len <= 0 || len > NFS_MAXNAMLEN) {
2483 * len is the number of bytes in the path element
2484 * name, not including the \0 termination.
2486 * tlen is the number of bytes w have to reserve for
2487 * the path element name.
2489 tlen = nfsm_rndup(len);
2491 tlen += 4; /* To ensure null termination */
2494 * If the entry would cross a DIRBLKSIZ boundary,
2495 * extend the previous nfs_dirent to cover the
2498 left = DIRBLKSIZ - blksiz;
2499 if ((tlen + sizeof(struct nfs_dirent)) > left) {
2500 dp->nfs_reclen += left;
2501 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
2502 uiop->uio_iov->iov_len -= left;
2503 uiop->uio_offset += left;
2504 uiop->uio_resid -= left;
2507 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid)
2510 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base;
2511 dp->nfs_ino = fileno;
2512 dp->nfs_namlen = len;
2513 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent);
2514 dp->nfs_type = DT_UNKNOWN;
2515 blksiz += dp->nfs_reclen;
2516 if (blksiz == DIRBLKSIZ)
2518 uiop->uio_offset += sizeof(struct nfs_dirent);
2519 uiop->uio_resid -= sizeof(struct nfs_dirent);
2520 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent);
2521 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent);
2522 ERROROUT(nfsm_mtouio(&info, uiop, len));
2525 * The uiop has advanced by nfs_dirent + len
2526 * but really needs to advance by
2529 cp = uiop->uio_iov->iov_base;
2531 *cp = '\0'; /* null terminate */
2532 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen;
2533 uiop->uio_iov->iov_len -= tlen;
2534 uiop->uio_offset += tlen;
2535 uiop->uio_resid -= tlen;
2538 * NFS strings must be rounded up (nfsm_myouio
2539 * handled that in the bigenough case).
2541 ERROROUT(nfsm_adv(&info, nfsm_rndup(len)));
2544 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
2546 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED));
2550 * If we were able to accomodate the last entry,
2551 * get the cookie for the next one. Otherwise
2552 * hold-over the cookie for the one we were not
2553 * able to accomodate.
2556 cookie.nfsuquad[0] = *tl++;
2558 cookie.nfsuquad[1] = *tl++;
2559 } else if (info.v3) {
2564 more_dirs = fxdr_unsigned(int, *tl);
2567 * If at end of rpc data, get the eof boolean
2570 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
2571 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2577 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2578 * by increasing d_reclen for the last record.
2581 left = DIRBLKSIZ - blksiz;
2582 dp->nfs_reclen += left;
2583 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
2584 uiop->uio_iov->iov_len -= left;
2585 uiop->uio_offset += left;
2586 uiop->uio_resid -= left;
2591 * We hit the end of the directory, update direofoffset.
2593 dnp->n_direofoffset = uiop->uio_offset;
2596 * There is more to go, insert the link cookie so the
2597 * next block can be read.
2599 if (uiop->uio_resid > 0)
2600 kprintf("EEK! readdirrpc resid > 0\n");
2601 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2609 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2612 nfs_readdirplusrpc_uio(struct vnode *vp, struct uio *uiop)
2615 struct nfs_dirent *dp;
2617 struct vnode *newvp;
2619 caddr_t dpossav1, dpossav2;
2621 struct mbuf *mdsav1, *mdsav2;
2623 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2624 struct nfsnode *dnp = VTONFS(vp), *np;
2627 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2628 int attrflag, fhsize;
2629 struct nchandle nch;
2630 struct nchandle dnch;
2631 struct nlcomponent nlc;
2632 struct nfsm_info info;
2641 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2642 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2643 panic("nfs readdirplusrpc bad uio");
2646 * Obtain the namecache record for the directory so we have something
2647 * to use as a basis for creating the entries. This function will
2648 * return a held (but not locked) ncp. The ncp may be disconnected
2649 * from the tree and cannot be used for upward traversals, and the
2650 * ncp may be unnamed. Note that other unrelated operations may
2651 * cause the ncp to be named at any time.
2653 * We have to lock the ncp to prevent a lock order reversal when
2654 * rdirplus does nlookups of the children, because the vnode is
2655 * locked and has to stay that way.
2657 cache_fromdvp(vp, NULL, 0, &dnch);
2658 bzero(&nlc, sizeof(nlc));
2662 * If there is no cookie, assume directory was stale.
2664 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2670 return (NFSERR_BAD_COOKIE);
2674 * Loop around doing readdir rpc's of size nm_readdirsize
2675 * truncated to a multiple of DIRBLKSIZ.
2676 * The stopping criteria is EOF or buffer full.
2678 while (more_dirs && bigenough) {
2679 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
2680 nfsm_reqhead(&info, vp, NFSPROC_READDIRPLUS,
2681 NFSX_FH(info.v3) + 6 * NFSX_UNSIGNED);
2682 ERROROUT(nfsm_fhtom(&info, vp));
2683 tl = nfsm_build(&info, 6 * NFSX_UNSIGNED);
2684 *tl++ = cookie.nfsuquad[0];
2685 *tl++ = cookie.nfsuquad[1];
2686 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2687 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2688 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2689 *tl = txdr_unsigned(nmp->nm_rsize);
2690 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READDIRPLUS,
2692 nfs_vpcred(vp, ND_READ), &error));
2693 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag,
2694 NFS_LATTR_NOSHRINK));
2695 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
2696 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2697 dnp->n_cookieverf.nfsuquad[1] = *tl++;
2698 more_dirs = fxdr_unsigned(int, *tl);
2700 /* loop thru the dir entries, doctoring them to 4bsd form */
2701 while (more_dirs && bigenough) {
2702 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
2703 fileno = fxdr_hyper(tl);
2704 len = fxdr_unsigned(int, *(tl + 2));
2705 if (len <= 0 || len > NFS_MAXNAMLEN) {
2711 tlen = nfsm_rndup(len);
2713 tlen += 4; /* To ensure null termination*/
2714 left = DIRBLKSIZ - blksiz;
2715 if ((tlen + sizeof(struct nfs_dirent)) > left) {
2716 dp->nfs_reclen += left;
2717 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
2718 uiop->uio_iov->iov_len -= left;
2719 uiop->uio_offset += left;
2720 uiop->uio_resid -= left;
2723 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid)
2726 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base;
2727 dp->nfs_ino = fileno;
2728 dp->nfs_namlen = len;
2729 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent);
2730 dp->nfs_type = DT_UNKNOWN;
2731 blksiz += dp->nfs_reclen;
2732 if (blksiz == DIRBLKSIZ)
2734 uiop->uio_offset += sizeof(struct nfs_dirent);
2735 uiop->uio_resid -= sizeof(struct nfs_dirent);
2736 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent);
2737 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent);
2738 nlc.nlc_nameptr = uiop->uio_iov->iov_base;
2739 nlc.nlc_namelen = len;
2740 ERROROUT(nfsm_mtouio(&info, uiop, len));
2741 cp = uiop->uio_iov->iov_base;
2744 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen;
2745 uiop->uio_iov->iov_len -= tlen;
2746 uiop->uio_offset += tlen;
2747 uiop->uio_resid -= tlen;
2749 ERROROUT(nfsm_adv(&info, nfsm_rndup(len)));
2751 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
2753 cookie.nfsuquad[0] = *tl++;
2754 cookie.nfsuquad[1] = *tl++;
2760 * Since the attributes are before the file handle
2761 * (sigh), we must skip over the attributes and then
2762 * come back and get them.
2764 attrflag = fxdr_unsigned(int, *tl);
2766 dpossav1 = info.dpos;
2768 ERROROUT(nfsm_adv(&info, NFSX_V3FATTR));
2769 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
2770 doit = fxdr_unsigned(int, *tl);
2772 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp));
2774 if (doit && bigenough && !nlcdegenerate(&nlc) &&
2775 !NFS_CMPFH(dnp, fhp, fhsize)
2779 kprintf("NFS/READDIRPLUS, ENTER %*.*s\n",
2780 nlc.nlc_namelen, nlc.nlc_namelen,
2784 * This is a bit hokey but there isn't
2785 * much we can do about it. We can't
2786 * hold the directory vp locked while
2787 * doing lookups and gets.
2789 nch = cache_nlookup_nonblock(&dnch, &nlc);
2790 if (nch.ncp == NULL)
2792 cache_setunresolved(&nch);
2793 error = nfs_nget_nonblock(vp->v_mount, fhp,
2800 dpossav2 = info.dpos;
2801 info.dpos = dpossav1;
2804 ERROROUT(nfsm_loadattr(&info, newvp, NULL));
2805 info.dpos = dpossav2;
2808 IFTODT(VTTOIF(np->n_vattr.va_type));
2809 nfs_cache_setvp(&nch, newvp,
2810 nfspos_cache_timeout);
2818 kprintf("Warning: NFS/rddirplus, "
2819 "UNABLE TO ENTER %*.*s\n",
2820 nlc.nlc_namelen, nlc.nlc_namelen,
2826 /* Just skip over the file handle */
2827 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
2828 i = fxdr_unsigned(int, *tl);
2829 ERROROUT(nfsm_adv(&info, nfsm_rndup(i)));
2831 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
2832 more_dirs = fxdr_unsigned(int, *tl);
2835 * If at end of rpc data, get the eof boolean
2838 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
2839 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2845 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2846 * by increasing d_reclen for the last record.
2849 left = DIRBLKSIZ - blksiz;
2850 dp->nfs_reclen += left;
2851 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
2852 uiop->uio_iov->iov_len -= left;
2853 uiop->uio_offset += left;
2854 uiop->uio_resid -= left;
2858 * We are now either at the end of the directory or have filled the
2862 dnp->n_direofoffset = uiop->uio_offset;
2864 if (uiop->uio_resid > 0)
2865 kprintf("EEK! readdirplusrpc resid > 0\n");
2866 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2870 if (newvp != NULLVP) {
2883 * Silly rename. To make the NFS filesystem that is stateless look a little
2884 * more like the "ufs" a remove of an active vnode is translated to a rename
2885 * to a funny looking filename that is removed by nfs_inactive on the
2886 * nfsnode. There is the potential for another process on a different client
2887 * to create the same funny name between the nfs_lookitup() fails and the
2888 * nfs_rename() completes, but...
2891 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2893 struct sillyrename *sp;
2898 * We previously purged dvp instead of vp. I don't know why, it
2899 * completely destroys performance. We can't do it anyway with the
2900 * new VFS API since we would be breaking the namecache topology.
2902 cache_purge(vp); /* XXX */
2905 if (vp->v_type == VDIR)
2906 panic("nfs: sillyrename dir");
2908 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2909 M_NFSREQ, M_WAITOK);
2910 sp->s_cred = crdup(cnp->cn_cred);
2914 /* Fudge together a funny name */
2915 sp->s_namlen = ksprintf(sp->s_name, ".nfsA%08x4.4",
2916 (int)(intptr_t)cnp->cn_td);
2918 /* Try lookitups until we get one that isn't there */
2919 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2920 cnp->cn_td, NULL) == 0) {
2922 if (sp->s_name[4] > 'z') {
2927 error = nfs_renameit(dvp, cnp, sp);
2930 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2932 np->n_sillyrename = sp;
2937 kfree((caddr_t)sp, M_NFSREQ);
2942 * Look up a file name and optionally either update the file handle or
2943 * allocate an nfsnode, depending on the value of npp.
2944 * npp == NULL --> just do the lookup
2945 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2947 * *npp != NULL --> update the file handle in the vnode
2950 nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred,
2951 struct thread *td, struct nfsnode **npp)
2953 struct vnode *newvp = NULL;
2954 struct nfsnode *np, *dnp = VTONFS(dvp);
2955 int error = 0, fhlen, attrflag;
2957 struct nfsm_info info;
2960 info.v3 = NFS_ISV3(dvp);
2962 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
2963 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP,
2964 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2965 ERROROUT(nfsm_fhtom(&info, dvp));
2966 ERROROUT(nfsm_strtom(&info, name, len, NFS_MAXNAMLEN));
2967 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, td, cred, &error));
2968 if (npp && !error) {
2969 NEGATIVEOUT(fhlen = nfsm_getfh(&info, &nfhp));
2972 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2973 kfree((caddr_t)np->n_fhp, M_NFSBIGFH);
2974 np->n_fhp = &np->n_fh;
2975 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2976 np->n_fhp =(nfsfh_t *)kmalloc(fhlen,M_NFSBIGFH,M_WAITOK);
2977 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2978 np->n_fhsize = fhlen;
2980 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
2984 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
2993 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag,
2994 NFS_LATTR_NOSHRINK));
2995 if (!attrflag && *npp == NULL) {
3005 ERROROUT(nfsm_loadattr(&info, newvp, NULL));
3011 if (npp && *npp == NULL) {
3026 * Nfs Version 3 commit rpc
3028 * We call it 'uio' to distinguish it from 'bio' but there is no real uio
3032 nfs_commitrpc_uio(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td)
3034 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
3035 int error = 0, wccflag = NFSV3_WCCRATTR;
3036 struct nfsm_info info;
3042 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
3044 nfsstats.rpccnt[NFSPROC_COMMIT]++;
3045 nfsm_reqhead(&info, vp, NFSPROC_COMMIT, NFSX_FH(1));
3046 ERROROUT(nfsm_fhtom(&info, vp));
3047 tl = nfsm_build(&info, 3 * NFSX_UNSIGNED);
3048 txdr_hyper(offset, tl);
3050 *tl = txdr_unsigned(cnt);
3051 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_COMMIT, td,
3052 nfs_vpcred(vp, ND_WRITE), &error));
3053 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag));
3055 NULLOUT(tl = nfsm_dissect(&info, NFSX_V3WRITEVERF));
3056 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
3057 NFSX_V3WRITEVERF)) {
3058 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
3060 error = NFSERR_STALEWRITEVERF;
3071 * - make nfs_bmap() essentially a no-op that does no translation
3072 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
3073 * (Maybe I could use the process's page mapping, but I was concerned that
3074 * Kernel Write might not be enabled and also figured copyout() would do
3075 * a lot more work than bcopy() and also it currently happens in the
3076 * context of the swapper process (2).
3078 * nfs_bmap(struct vnode *a_vp, off_t a_loffset,
3079 * off_t *a_doffsetp, int *a_runp, int *a_runb)
3082 nfs_bmap(struct vop_bmap_args *ap)
3084 /* no token lock required */
3085 if (ap->a_doffsetp != NULL)
3086 *ap->a_doffsetp = ap->a_loffset;
3087 if (ap->a_runp != NULL)
3089 if (ap->a_runb != NULL)
3098 nfs_strategy(struct vop_strategy_args *ap)
3100 struct bio *bio = ap->a_bio;
3102 struct buf *bp __debugvar = bio->bio_buf;
3103 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount);
3107 KASSERT(bp->b_cmd != BUF_CMD_DONE,
3108 ("nfs_strategy: buffer %p unexpectedly marked done", bp));
3109 KASSERT(BUF_REFCNT(bp) > 0,
3110 ("nfs_strategy: buffer %p not locked", bp));
3112 if (bio->bio_flags & BIO_SYNC)
3113 td = curthread; /* XXX */
3117 lwkt_gettoken(&nmp->nm_token);
3120 * We probably don't need to push an nbio any more since no
3121 * block conversion is required due to the use of 64 bit byte
3122 * offsets, but do it anyway.
3124 * NOTE: When NFS callers itself via this strategy routines and
3125 * sets up a synchronous I/O, it expects the I/O to run
3126 * synchronously (its bio_done routine just assumes it),
3127 * so for now we have to honor the bit.
3129 nbio = push_bio(bio);
3130 nbio->bio_offset = bio->bio_offset;
3131 nbio->bio_flags = bio->bio_flags & BIO_SYNC;
3134 * If the op is asynchronous and an i/o daemon is waiting
3135 * queue the request, wake it up and wait for completion
3136 * otherwise just do it ourselves.
3138 if (bio->bio_flags & BIO_SYNC) {
3139 error = nfs_doio(ap->a_vp, nbio, td);
3141 nfs_asyncio(ap->a_vp, nbio);
3144 lwkt_reltoken(&nmp->nm_token);
3152 * NB Currently unsupported.
3154 * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred)
3158 nfs_mmap(struct vop_mmap_args *ap)
3160 /* no token lock required */
3165 * fsync vnode op. Just call nfs_flush() with commit == 1.
3167 * nfs_fsync(struct vnode *a_vp, int a_waitfor)
3171 nfs_fsync(struct vop_fsync_args *ap)
3173 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount);
3176 lwkt_gettoken(&nmp->nm_token);
3177 error = nfs_flush(ap->a_vp, ap->a_waitfor, curthread, 1);
3178 lwkt_reltoken(&nmp->nm_token);
3184 * Flush all the blocks associated with a vnode. Dirty NFS buffers may be
3185 * in one of two states: If B_NEEDCOMMIT is clear then the buffer contains
3186 * new NFS data which needs to be written to the server. If B_NEEDCOMMIT is
3187 * set the buffer contains data that has already been written to the server
3188 * and which now needs a commit RPC.
3190 * If commit is 0 we only take one pass and only flush buffers containing new
3193 * If commit is 1 we take two passes, issuing a commit RPC in the second
3196 * If waitfor is MNT_WAIT and commit is 1, we loop as many times as required
3197 * to completely flush all pending data.
3199 * Note that the RB_SCAN code properly handles the case where the
3200 * callback might block and directly or indirectly (another thread) cause
3201 * the RB tree to change.
3204 #ifndef NFS_COMMITBVECSIZ
3205 #define NFS_COMMITBVECSIZ 16
3208 struct nfs_flush_info {
3209 enum { NFI_FLUSHNEW, NFI_COMMIT } mode;
3216 struct buf *bvary[NFS_COMMITBVECSIZ];
3222 static int nfs_flush_bp(struct buf *bp, void *data);
3223 static int nfs_flush_docommit(struct nfs_flush_info *info, int error);
3226 nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit)
3228 struct nfsnode *np = VTONFS(vp);
3229 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
3230 struct nfs_flush_info info;
3233 bzero(&info, sizeof(info));
3236 info.waitfor = waitfor;
3237 info.slpflag = (nmp->nm_flag & NFSMNT_INT) ? PCATCH : 0;
3239 lwkt_gettoken(&vp->v_token);
3245 info.mode = NFI_FLUSHNEW;
3246 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
3247 nfs_flush_bp, &info);
3250 * Take a second pass if committing and no error occured.
3251 * Clean up any left over collection (whether an error
3254 if (commit && error == 0) {
3255 info.mode = NFI_COMMIT;
3256 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
3257 nfs_flush_bp, &info);
3259 error = nfs_flush_docommit(&info, error);
3263 * Wait for pending I/O to complete before checking whether
3264 * any further dirty buffers exist.
3266 while (waitfor == MNT_WAIT &&
3267 bio_track_active(&vp->v_track_write)) {
3268 error = bio_track_wait(&vp->v_track_write,
3269 info.slpflag, info.slptimeo);
3272 * We have to be able to break out if this
3273 * is an 'intr' mount.
3275 if (nfs_sigintr(nmp, NULL, td)) {
3281 * Since we do not process pending signals,
3282 * once we get a PCATCH our tsleep() will no
3283 * longer sleep, switch to a fixed timeout
3286 if (info.slpflag == PCATCH) {
3288 info.slptimeo = 2 * hz;
3295 * Loop if we are flushing synchronous as well as committing,
3296 * and dirty buffers are still present. Otherwise we might livelock.
3298 } while (waitfor == MNT_WAIT && commit &&
3299 error == 0 && !RB_EMPTY(&vp->v_rbdirty_tree));
3302 * The callbacks have to return a negative error to terminate the
3309 * Deal with any error collection
3311 if (np->n_flag & NWRITEERR) {
3312 error = np->n_error;
3313 np->n_flag &= ~NWRITEERR;
3315 lwkt_reltoken(&vp->v_token);
3321 nfs_flush_bp(struct buf *bp, void *data)
3323 struct nfs_flush_info *info = data;
3329 switch(info->mode) {
3331 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT);
3332 if (error && info->loops && info->waitfor == MNT_WAIT) {
3333 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT);
3335 lkflags = LK_EXCLUSIVE | LK_SLEEPFAIL;
3336 if (info->slpflag & PCATCH)
3337 lkflags |= LK_PCATCH;
3338 error = BUF_TIMELOCK(bp, lkflags, "nfsfsync",
3344 * Ignore locking errors
3352 * The buffer may have changed out from under us, even if
3353 * we did not block (MPSAFE). Check again now that it is
3356 if (bp->b_vp == info->vp &&
3357 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) == B_DELWRI) {
3366 * Only process buffers in need of a commit which we can
3367 * immediately lock. This may prevent a buffer from being
3368 * committed, but the normal flush loop will block on the
3369 * same buffer so we shouldn't get into an endless loop.
3371 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
3372 (B_DELWRI | B_NEEDCOMMIT)) {
3375 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
3379 * We must recheck after successfully locking the buffer.
3381 if (bp->b_vp != info->vp ||
3382 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
3383 (B_DELWRI | B_NEEDCOMMIT)) {
3389 * NOTE: storing the bp in the bvary[] basically sets
3390 * it up for a commit operation.
3392 * We must call vfs_busy_pages() now so the commit operation
3393 * is interlocked with user modifications to memory mapped
3394 * pages. The b_dirtyoff/b_dirtyend range is not correct
3395 * until after the pages have been busied.
3397 * Note: to avoid loopback deadlocks, we do not
3398 * assign b_runningbufspace.
3401 bp->b_cmd = BUF_CMD_WRITE;
3402 vfs_busy_pages(bp->b_vp, bp);
3403 info->bvary[info->bvsize] = bp;
3404 toff = bp->b_bio2.bio_offset + bp->b_dirtyoff;
3405 if (info->bvsize == 0 || toff < info->beg_off)
3406 info->beg_off = toff;
3407 toff += (off_t)(bp->b_dirtyend - bp->b_dirtyoff);
3408 if (info->bvsize == 0 || toff > info->end_off)
3409 info->end_off = toff;
3411 if (info->bvsize == NFS_COMMITBVECSIZ) {
3412 error = nfs_flush_docommit(info, 0);
3413 KKASSERT(info->bvsize == 0);
3421 nfs_flush_docommit(struct nfs_flush_info *info, int error)
3431 if (info->bvsize > 0) {
3433 * Commit data on the server, as required. Note that
3434 * nfs_commit will use the vnode's cred for the commit.
3435 * The NFSv3 commit RPC is limited to a 32 bit byte count.
3437 bytes = info->end_off - info->beg_off;
3438 if (bytes > 0x40000000)
3443 retv = nfs_commitrpc_uio(vp, info->beg_off,
3444 (int)bytes, info->td);
3445 if (retv == NFSERR_STALEWRITEVERF)
3446 nfs_clearcommit(vp->v_mount);
3450 * Now, either mark the blocks I/O done or mark the
3451 * blocks dirty, depending on whether the commit
3454 for (i = 0; i < info->bvsize; ++i) {
3455 bp = info->bvary[i];
3456 if (retv || (bp->b_flags & B_NEEDCOMMIT) == 0) {
3458 * Either an error or the original
3459 * vfs_busy_pages() cleared B_NEEDCOMMIT
3460 * due to finding new dirty VM pages in
3463 * Leave B_DELWRI intact.
3465 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
3466 vfs_unbusy_pages(bp);
3467 bp->b_cmd = BUF_CMD_DONE;
3471 * Success, remove B_DELWRI ( bundirty() ).
3473 * b_dirtyoff/b_dirtyend seem to be NFS
3474 * specific. We should probably move that
3475 * into bundirty(). XXX
3477 * We are faking an I/O write, we have to
3478 * start the transaction in order to
3479 * immediately biodone() it.
3482 bp->b_flags &= ~B_ERROR;
3483 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
3484 bp->b_dirtyoff = bp->b_dirtyend = 0;
3485 biodone(&bp->b_bio1);
3494 * NFS advisory byte-level locks.
3495 * Currently unsupported.
3497 * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl,
3501 nfs_advlock(struct vop_advlock_args *ap)
3503 struct nfsnode *np = VTONFS(ap->a_vp);
3505 /* no token lock currently required */
3507 * The following kludge is to allow diskless support to work
3508 * until a real NFS lockd is implemented. Basically, just pretend
3509 * that this is a local lock.
3511 return (lf_advlock(ap, &(np->n_lockf), np->n_size));
3515 * Print out the contents of an nfsnode.
3517 * nfs_print(struct vnode *a_vp)
3520 nfs_print(struct vop_print_args *ap)
3522 struct vnode *vp = ap->a_vp;
3523 struct nfsnode *np = VTONFS(vp);
3525 kprintf("tag VT_NFS, fileid %lld fsid 0x%x",
3526 (long long)np->n_vattr.va_fileid, np->n_vattr.va_fsid);
3527 if (vp->v_type == VFIFO)
3534 * nfs special file access vnode op.
3536 * nfs_laccess(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
3539 nfs_laccess(struct vop_access_args *ap)
3541 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount);
3545 lwkt_gettoken(&nmp->nm_token);
3546 error = VOP_GETATTR(ap->a_vp, &vattr);
3548 error = vop_helper_access(ap, vattr.va_uid, vattr.va_gid,
3551 lwkt_reltoken(&nmp->nm_token);
3557 * Read wrapper for fifos.
3559 * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3560 * struct ucred *a_cred)
3563 nfsfifo_read(struct vop_read_args *ap)
3565 struct nfsnode *np = VTONFS(ap->a_vp);
3567 /* no token access required */
3572 getnanotime(&np->n_atim);
3573 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
3577 * Write wrapper for fifos.
3579 * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3580 * struct ucred *a_cred)
3583 nfsfifo_write(struct vop_write_args *ap)
3585 struct nfsnode *np = VTONFS(ap->a_vp);
3587 /* no token access required */
3592 getnanotime(&np->n_mtim);
3593 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
3597 * Close wrapper for fifos.
3599 * Update the times on the nfsnode then do fifo close.
3601 * nfsfifo_close(struct vnode *a_vp, int a_fflag)
3604 nfsfifo_close(struct vop_close_args *ap)
3606 struct vnode *vp = ap->a_vp;
3607 struct nfsnode *np = VTONFS(vp);
3611 /* no token access required */
3613 if (np->n_flag & (NACC | NUPD)) {
3615 if (np->n_flag & NACC)
3617 if (np->n_flag & NUPD)
3620 if (vp->v_sysref.refcnt == 1 &&
3621 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3623 if (np->n_flag & NACC)
3624 vattr.va_atime = np->n_atim;
3625 if (np->n_flag & NUPD)
3626 vattr.va_mtime = np->n_mtim;
3627 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE));
3630 return (VOCALL(&fifo_vnode_vops, &ap->a_head));