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 $
42 * vnode op calls for Sun NFS version 2 and 3
47 #include <sys/param.h>
48 #include <sys/kernel.h>
49 #include <sys/systm.h>
50 #include <sys/resourcevar.h>
52 #include <sys/mount.h>
54 #include <sys/malloc.h>
56 #include <sys/namei.h>
57 #include <sys/nlookup.h>
58 #include <sys/socket.h>
59 #include <sys/vnode.h>
60 #include <sys/dirent.h>
61 #include <sys/fcntl.h>
62 #include <sys/lockf.h>
64 #include <sys/sysctl.h>
68 #include <vm/vm_extern.h>
72 #include <vfs/fifofs/fifo.h>
73 #include <vfs/ufs/dir.h>
83 #include "nfsm_subs.h"
86 #include <netinet/in.h>
87 #include <netinet/in_var.h>
89 #include <sys/thread2.h>
95 static int nfsfifo_read (struct vop_read_args *);
96 static int nfsfifo_write (struct vop_write_args *);
97 static int nfsfifo_close (struct vop_close_args *);
98 static int nfs_setattrrpc (struct vnode *,struct vattr *,struct ucred *,struct thread *);
99 static int nfs_lookup (struct vop_old_lookup_args *);
100 static int nfs_create (struct vop_old_create_args *);
101 static int nfs_mknod (struct vop_old_mknod_args *);
102 static int nfs_open (struct vop_open_args *);
103 static int nfs_close (struct vop_close_args *);
104 static int nfs_access (struct vop_access_args *);
105 static int nfs_getattr (struct vop_getattr_args *);
106 static int nfs_setattr (struct vop_setattr_args *);
107 static int nfs_read (struct vop_read_args *);
108 static int nfs_mmap (struct vop_mmap_args *);
109 static int nfs_fsync (struct vop_fsync_args *);
110 static int nfs_remove (struct vop_old_remove_args *);
111 static int nfs_link (struct vop_old_link_args *);
112 static int nfs_rename (struct vop_old_rename_args *);
113 static int nfs_mkdir (struct vop_old_mkdir_args *);
114 static int nfs_rmdir (struct vop_old_rmdir_args *);
115 static int nfs_symlink (struct vop_old_symlink_args *);
116 static int nfs_readdir (struct vop_readdir_args *);
117 static int nfs_bmap (struct vop_bmap_args *);
118 static int nfs_strategy (struct vop_strategy_args *);
119 static int nfs_lookitup (struct vnode *, const char *, int,
120 struct ucred *, struct thread *, struct nfsnode **);
121 static int nfs_sillyrename (struct vnode *,struct vnode *,struct componentname *);
122 static int nfs_laccess (struct vop_access_args *);
123 static int nfs_readlink (struct vop_readlink_args *);
124 static int nfs_print (struct vop_print_args *);
125 static int nfs_advlock (struct vop_advlock_args *);
127 static int nfs_nresolve (struct vop_nresolve_args *);
129 * Global vfs data structures for nfs
131 struct vop_ops nfsv2_vnode_vops = {
132 .vop_default = vop_defaultop,
133 .vop_access = nfs_access,
134 .vop_advlock = nfs_advlock,
135 .vop_bmap = nfs_bmap,
136 .vop_close = nfs_close,
137 .vop_old_create = nfs_create,
138 .vop_fsync = nfs_fsync,
139 .vop_getattr = nfs_getattr,
140 .vop_getpages = vop_stdgetpages,
141 .vop_putpages = vop_stdputpages,
142 .vop_inactive = nfs_inactive,
143 .vop_old_link = nfs_link,
144 .vop_old_lookup = nfs_lookup,
145 .vop_old_mkdir = nfs_mkdir,
146 .vop_old_mknod = nfs_mknod,
147 .vop_mmap = nfs_mmap,
148 .vop_open = nfs_open,
149 .vop_print = nfs_print,
150 .vop_read = nfs_read,
151 .vop_readdir = nfs_readdir,
152 .vop_readlink = nfs_readlink,
153 .vop_reclaim = nfs_reclaim,
154 .vop_old_remove = nfs_remove,
155 .vop_old_rename = nfs_rename,
156 .vop_old_rmdir = nfs_rmdir,
157 .vop_setattr = nfs_setattr,
158 .vop_strategy = nfs_strategy,
159 .vop_old_symlink = nfs_symlink,
160 .vop_write = nfs_write,
161 .vop_nresolve = nfs_nresolve
165 * Special device vnode ops
167 struct vop_ops nfsv2_spec_vops = {
168 .vop_default = vop_defaultop,
169 .vop_access = nfs_laccess,
170 .vop_close = nfs_close,
171 .vop_fsync = nfs_fsync,
172 .vop_getattr = nfs_getattr,
173 .vop_inactive = nfs_inactive,
174 .vop_print = nfs_print,
175 .vop_read = vop_stdnoread,
176 .vop_reclaim = nfs_reclaim,
177 .vop_setattr = nfs_setattr,
178 .vop_write = vop_stdnowrite
181 struct vop_ops nfsv2_fifo_vops = {
182 .vop_default = fifo_vnoperate,
183 .vop_access = nfs_laccess,
184 .vop_close = nfsfifo_close,
185 .vop_fsync = nfs_fsync,
186 .vop_getattr = nfs_getattr,
187 .vop_inactive = nfs_inactive,
188 .vop_print = nfs_print,
189 .vop_read = nfsfifo_read,
190 .vop_reclaim = nfs_reclaim,
191 .vop_setattr = nfs_setattr,
192 .vop_write = nfsfifo_write
195 static int nfs_mknodrpc (struct vnode *dvp, struct vnode **vpp,
196 struct componentname *cnp,
198 static int nfs_removerpc (struct vnode *dvp, const char *name,
200 struct ucred *cred, struct thread *td);
201 static int nfs_renamerpc (struct vnode *fdvp, const char *fnameptr,
202 int fnamelen, struct vnode *tdvp,
203 const char *tnameptr, int tnamelen,
204 struct ucred *cred, struct thread *td);
205 static int nfs_renameit (struct vnode *sdvp,
206 struct componentname *scnp,
207 struct sillyrename *sp);
209 SYSCTL_DECL(_vfs_nfs);
211 static int nfs_flush_on_rename = 1;
212 SYSCTL_INT(_vfs_nfs, OID_AUTO, flush_on_rename, CTLFLAG_RW,
213 &nfs_flush_on_rename, 0, "flush fvp prior to rename");
214 static int nfs_flush_on_hlink = 0;
215 SYSCTL_INT(_vfs_nfs, OID_AUTO, flush_on_hlink, CTLFLAG_RW,
216 &nfs_flush_on_hlink, 0, "flush fvp prior to hard link");
218 static int nfsaccess_cache_timeout = NFS_DEFATTRTIMO;
219 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
220 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
222 static int nfsneg_cache_timeout = NFS_MINATTRTIMO;
223 SYSCTL_INT(_vfs_nfs, OID_AUTO, neg_cache_timeout, CTLFLAG_RW,
224 &nfsneg_cache_timeout, 0, "NFS NEGATIVE NAMECACHE timeout");
226 static int nfspos_cache_timeout = NFS_MINATTRTIMO;
227 SYSCTL_INT(_vfs_nfs, OID_AUTO, pos_cache_timeout, CTLFLAG_RW,
228 &nfspos_cache_timeout, 0, "NFS POSITIVE NAMECACHE timeout");
230 static int nfsv3_commit_on_close = 0;
231 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
232 &nfsv3_commit_on_close, 0, "write+commit on close, else only write");
234 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
235 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
237 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
238 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
241 #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \
242 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \
243 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP)
246 * Returns whether a name component is a degenerate '.' or '..'.
250 nlcdegenerate(struct nlcomponent *nlc)
252 if (nlc->nlc_namelen == 1 && nlc->nlc_nameptr[0] == '.')
254 if (nlc->nlc_namelen == 2 &&
255 nlc->nlc_nameptr[0] == '.' && nlc->nlc_nameptr[1] == '.')
261 nfs3_access_otw(struct vnode *vp, int wmode,
262 struct thread *td, struct ucred *cred)
264 struct nfsnode *np = VTONFS(vp);
269 struct nfsm_info info;
274 nfsstats.rpccnt[NFSPROC_ACCESS]++;
275 nfsm_reqhead(&info, vp, NFSPROC_ACCESS,
276 NFSX_FH(info.v3) + NFSX_UNSIGNED);
277 ERROROUT(nfsm_fhtom(&info, vp));
278 tl = nfsm_build(&info, NFSX_UNSIGNED);
279 *tl = txdr_unsigned(wmode);
280 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_ACCESS, td, cred, &error));
281 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, NFS_LATTR_NOSHRINK));
283 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
284 rmode = fxdr_unsigned(u_int32_t, *tl);
286 np->n_modeuid = cred->cr_uid;
287 np->n_modestamp = mycpu->gd_time_seconds;
296 * nfs access vnode op.
297 * For nfs version 2, just return ok. File accesses may fail later.
298 * For nfs version 3, use the access rpc to check accessibility. If file modes
299 * are changed on the server, accesses might still fail later.
301 * nfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
304 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 struct nfsnode *np = VTONFS(vp);
312 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
313 int v3 = NFS_ISV3(vp);
315 lwkt_gettoken(&nmp->nm_token);
318 * Disallow write attempts on filesystems mounted read-only;
319 * unless the file is a socket, fifo, or a block or character
320 * device resident on the filesystem.
322 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
323 switch (vp->v_type) {
327 lwkt_reltoken(&nmp->nm_token);
335 * The NFS protocol passes only the effective uid/gid over the wire but
336 * we need to check access against real ids if AT_EACCESS not set.
337 * Handle this case by cloning the credentials and setting the
338 * effective ids to the real ones.
340 if (ap->a_flags & AT_EACCESS) {
341 cred = crhold(ap->a_cred);
343 cred = crdup(ap->a_cred);
344 cred->cr_uid = cred->cr_ruid;
345 cred->cr_gid = cred->cr_rgid;
349 * For nfs v3, check to see if we have done this recently, and if
350 * so return our cached result instead of making an ACCESS call.
351 * If not, do an access rpc, otherwise you are stuck emulating
352 * ufs_access() locally using the vattr. This may not be correct,
353 * since the server may apply other access criteria such as
354 * client uid-->server uid mapping that we do not know about.
357 if (ap->a_mode & VREAD)
358 mode = NFSV3ACCESS_READ;
361 if (vp->v_type != VDIR) {
362 if (ap->a_mode & VWRITE)
363 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
364 if (ap->a_mode & VEXEC)
365 mode |= NFSV3ACCESS_EXECUTE;
367 if (ap->a_mode & VWRITE)
368 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
370 if (ap->a_mode & VEXEC)
371 mode |= NFSV3ACCESS_LOOKUP;
373 /* XXX safety belt, only make blanket request if caching */
374 if (nfsaccess_cache_timeout > 0) {
375 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY |
376 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE |
377 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP;
383 * Does our cached result allow us to give a definite yes to
386 if (np->n_modestamp &&
387 (mycpu->gd_time_seconds < (np->n_modestamp + nfsaccess_cache_timeout)) &&
388 (cred->cr_uid == np->n_modeuid) &&
389 ((np->n_mode & mode) == mode)) {
390 nfsstats.accesscache_hits++;
393 * Either a no, or a don't know. Go to the wire.
395 nfsstats.accesscache_misses++;
396 error = nfs3_access_otw(vp, wmode, td, cred);
398 if ((np->n_mode & mode) != mode) {
404 if ((error = nfs_laccess(ap)) != 0) {
406 lwkt_reltoken(&nmp->nm_token);
411 * Attempt to prevent a mapped root from accessing a file
412 * which it shouldn't. We try to read a byte from the file
413 * if the user is root and the file is not zero length.
414 * After calling nfs_laccess, we should have the correct
417 if (cred->cr_uid == 0 && (ap->a_mode & VREAD)
418 && VTONFS(vp)->n_size > 0) {
425 auio.uio_iov = &aiov;
429 auio.uio_segflg = UIO_SYSSPACE;
430 auio.uio_rw = UIO_READ;
433 if (vp->v_type == VREG) {
434 error = nfs_readrpc_uio(vp, &auio);
435 } else if (vp->v_type == VDIR) {
437 bp = kmalloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
439 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
440 error = nfs_readdirrpc_uio(vp, &auio);
442 } else if (vp->v_type == VLNK) {
443 error = nfs_readlinkrpc_uio(vp, &auio);
450 * [re]record creds for reading and/or writing if access
451 * was granted. Assume the NFS server will grant read access
452 * for execute requests.
455 if ((ap->a_mode & (VREAD|VEXEC)) && cred != np->n_rucred) {
458 crfree(np->n_rucred);
461 if ((ap->a_mode & VWRITE) && cred != np->n_wucred) {
464 crfree(np->n_wucred);
468 lwkt_reltoken(&nmp->nm_token);
475 * Check to see if the type is ok
476 * and that deletion is not in progress.
477 * For paged in text files, you will need to flush the page cache
478 * if consistency is lost.
480 * nfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
485 nfs_open(struct vop_open_args *ap)
487 struct vnode *vp = ap->a_vp;
488 struct nfsnode *np = VTONFS(vp);
489 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
493 lwkt_gettoken(&nmp->nm_token);
495 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
497 kprintf("open eacces vtyp=%d\n",vp->v_type);
499 lwkt_reltoken(&nmp->nm_token);
504 * Save valid creds for reading and writing for later RPCs.
506 if ((ap->a_mode & FREAD) && ap->a_cred != np->n_rucred) {
509 crfree(np->n_rucred);
510 np->n_rucred = ap->a_cred;
512 if ((ap->a_mode & FWRITE) && ap->a_cred != np->n_wucred) {
515 crfree(np->n_wucred);
516 np->n_wucred = ap->a_cred;
520 * Clear the attribute cache only if opening with write access. It
521 * is unclear if we should do this at all here, but we certainly
522 * should not clear the cache unconditionally simply because a file
525 if (ap->a_mode & FWRITE)
529 * For normal NFS, reconcile changes made locally verses
530 * changes made remotely. Note that VOP_GETATTR only goes
531 * to the wire if the cached attribute has timed out or been
534 * If local modifications have been made clear the attribute
535 * cache to force an attribute and modified time check. If
536 * GETATTR detects that the file has been changed by someone
537 * other then us it will set NRMODIFIED.
539 * If we are opening a directory and local changes have been
540 * made we have to invalidate the cache in order to ensure
541 * that we get the most up-to-date information from the
544 if (np->n_flag & NLMODIFIED) {
546 if (vp->v_type == VDIR) {
547 error = nfs_vinvalbuf(vp, V_SAVE, 1);
553 error = VOP_GETATTR(vp, &vattr);
555 lwkt_reltoken(&nmp->nm_token);
558 if (np->n_flag & NRMODIFIED) {
559 if (vp->v_type == VDIR)
561 error = nfs_vinvalbuf(vp, V_SAVE, 1);
562 if (error == EINTR) {
563 lwkt_reltoken(&nmp->nm_token);
566 np->n_flag &= ~NRMODIFIED;
568 error = vop_stdopen(ap);
569 lwkt_reltoken(&nmp->nm_token);
576 * What an NFS client should do upon close after writing is a debatable issue.
577 * Most NFS clients push delayed writes to the server upon close, basically for
579 * 1 - So that any write errors may be reported back to the client process
580 * doing the close system call. By far the two most likely errors are
581 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
582 * 2 - To put a worst case upper bound on cache inconsistency between
583 * multiple clients for the file.
584 * There is also a consistency problem for Version 2 of the protocol w.r.t.
585 * not being able to tell if other clients are writing a file concurrently,
586 * since there is no way of knowing if the changed modify time in the reply
587 * is only due to the write for this client.
588 * (NFS Version 3 provides weak cache consistency data in the reply that
589 * should be sufficient to detect and handle this case.)
591 * The current code does the following:
592 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
593 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
594 * or commit them (this satisfies 1 and 2 except for the
595 * case where the server crashes after this close but
596 * before the commit RPC, which is felt to be "good
597 * enough". Changing the last argument to nfs_flush() to
598 * a 1 would force a commit operation, if it is felt a
599 * commit is necessary now.
600 * for NQNFS - do nothing now, since 2 is dealt with via leases and
601 * 1 should be dealt with via an fsync() system call for
602 * cases where write errors are important.
604 * nfs_close(struct vnode *a_vp, int a_fflag)
608 nfs_close(struct vop_close_args *ap)
610 struct vnode *vp = ap->a_vp;
611 struct nfsnode *np = VTONFS(vp);
612 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
614 thread_t td = curthread;
616 lwkt_gettoken(&nmp->nm_token);
618 if (vp->v_type == VREG) {
619 if (np->n_flag & NLMODIFIED) {
622 * Under NFSv3 we have dirty buffers to dispose of. We
623 * must flush them to the NFS server. We have the option
624 * of waiting all the way through the commit rpc or just
625 * waiting for the initial write. The default is to only
626 * wait through the initial write so the data is in the
627 * server's cache, which is roughly similar to the state
628 * a standard disk subsystem leaves the file in on close().
630 * We cannot clear the NLMODIFIED bit in np->n_flag due to
631 * potential races with other processes, and certainly
632 * cannot clear it if we don't commit.
634 int cm = nfsv3_commit_on_close ? 1 : 0;
635 error = nfs_flush(vp, MNT_WAIT, td, cm);
636 /* np->n_flag &= ~NLMODIFIED; */
638 error = nfs_vinvalbuf(vp, V_SAVE, 1);
642 if (np->n_flag & NWRITEERR) {
643 np->n_flag &= ~NWRITEERR;
648 lwkt_reltoken(&nmp->nm_token);
654 * nfs getattr call from vfs.
656 * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap)
659 nfs_getattr(struct vop_getattr_args *ap)
661 struct vnode *vp = ap->a_vp;
662 struct nfsnode *np = VTONFS(vp);
663 struct nfsmount *nmp;
665 thread_t td = curthread;
666 struct nfsm_info info;
669 info.v3 = NFS_ISV3(vp);
670 nmp = VFSTONFS(vp->v_mount);
672 lwkt_gettoken(&nmp->nm_token);
675 * Update local times for special files.
677 if (np->n_flag & (NACC | NUPD))
680 * First look in the cache.
682 if (nfs_getattrcache(vp, ap->a_vap) == 0)
685 if (info.v3 && nfsaccess_cache_timeout > 0) {
686 nfsstats.accesscache_misses++;
687 nfs3_access_otw(vp, NFSV3ACCESS_ALL, td, nfs_vpcred(vp, ND_CHECK));
688 if (nfs_getattrcache(vp, ap->a_vap) == 0)
692 nfsstats.rpccnt[NFSPROC_GETATTR]++;
693 nfsm_reqhead(&info, vp, NFSPROC_GETATTR, NFSX_FH(info.v3));
694 ERROROUT(nfsm_fhtom(&info, vp));
695 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_GETATTR, td,
696 nfs_vpcred(vp, ND_CHECK), &error));
698 ERROROUT(nfsm_loadattr(&info, vp, ap->a_vap));
704 * NFS doesn't support chflags flags. If the nfs mount was
705 * made -o cache set the UF_CACHE bit for swapcache.
707 if ((nmp->nm_flag & NFSMNT_CACHE) && (vp->v_flag & VROOT))
708 ap->a_vap->va_flags |= UF_CACHE;
710 lwkt_reltoken(&nmp->nm_token);
717 * nfs_setattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred)
720 nfs_setattr(struct vop_setattr_args *ap)
722 struct vnode *vp = ap->a_vp;
723 struct nfsnode *np = VTONFS(vp);
724 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
725 struct vattr *vap = ap->a_vap;
728 thread_t td = curthread;
734 * Setting of flags is not supported.
736 if (vap->va_flags != VNOVAL)
740 * Disallow write attempts if the filesystem is mounted read-only.
742 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
743 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
744 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
745 (vp->v_mount->mnt_flag & MNT_RDONLY))
748 lwkt_gettoken(&nmp->nm_token);
750 if (vap->va_size != VNOVAL) {
752 * truncation requested
754 switch (vp->v_type) {
756 lwkt_reltoken(&nmp->nm_token);
762 if (vap->va_mtime.tv_sec == VNOVAL &&
763 vap->va_atime.tv_sec == VNOVAL &&
764 vap->va_mode == (mode_t)VNOVAL &&
765 vap->va_uid == (uid_t)VNOVAL &&
766 vap->va_gid == (gid_t)VNOVAL) {
767 lwkt_reltoken(&nmp->nm_token);
770 vap->va_size = VNOVAL;
774 * Disallow write attempts if the filesystem is
777 if (vp->v_mount->mnt_flag & MNT_RDONLY) {
778 lwkt_reltoken(&nmp->nm_token);
784 error = nfs_meta_setsize(vp, td, vap->va_size, 0);
787 if (np->n_flag & NLMODIFIED) {
788 if (vap->va_size == 0)
789 error = nfs_vinvalbuf(vp, 0, 1);
791 error = nfs_vinvalbuf(vp, V_SAVE, 1);
795 * note: this loop case almost always happens at
796 * least once per truncation.
798 if (error == 0 && np->n_size != vap->va_size)
800 np->n_vattr.va_size = vap->va_size;
803 } else if ((np->n_flag & NLMODIFIED) && vp->v_type == VREG) {
805 * What to do. If we are modifying the mtime we lose
806 * mtime detection of changes made by the server or other
807 * clients. But programs like rsync/rdist/cpdup are going
808 * to call utimes a lot. We don't want to piecemeal sync.
810 * For now sync if any prior remote changes were detected,
811 * but allow us to lose track of remote changes made during
812 * the utimes operation.
814 if (np->n_flag & NRMODIFIED)
815 error = nfs_vinvalbuf(vp, V_SAVE, 1);
819 if (vap->va_mtime.tv_sec != VNOVAL) {
820 np->n_mtime = vap->va_mtime.tv_sec;
824 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
827 * Sanity check if a truncation was issued. This should only occur
828 * if multiple processes are racing on the same file.
830 if (error == 0 && vap->va_size != VNOVAL &&
831 np->n_size != vap->va_size) {
832 kprintf("NFS ftruncate: server disagrees on the file size: "
835 (intmax_t)vap->va_size,
836 (intmax_t)np->n_size);
839 if (error && vap->va_size != VNOVAL) {
840 np->n_size = np->n_vattr.va_size = tsize;
841 nfs_meta_setsize(vp, td, np->n_size, 0);
843 lwkt_reltoken(&nmp->nm_token);
849 * Do an nfs setattr rpc.
852 nfs_setattrrpc(struct vnode *vp, struct vattr *vap,
853 struct ucred *cred, struct thread *td)
855 struct nfsv2_sattr *sp;
856 struct nfsnode *np = VTONFS(vp);
858 int error = 0, wccflag = NFSV3_WCCRATTR;
859 struct nfsm_info info;
862 info.v3 = NFS_ISV3(vp);
864 nfsstats.rpccnt[NFSPROC_SETATTR]++;
865 nfsm_reqhead(&info, vp, NFSPROC_SETATTR,
866 NFSX_FH(info.v3) + NFSX_SATTR(info.v3));
867 ERROROUT(nfsm_fhtom(&info, vp));
869 nfsm_v3attrbuild(&info, vap, TRUE);
870 tl = nfsm_build(&info, NFSX_UNSIGNED);
873 sp = nfsm_build(&info, NFSX_V2SATTR);
874 if (vap->va_mode == (mode_t)VNOVAL)
875 sp->sa_mode = nfs_xdrneg1;
877 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
878 if (vap->va_uid == (uid_t)VNOVAL)
879 sp->sa_uid = nfs_xdrneg1;
881 sp->sa_uid = txdr_unsigned(vap->va_uid);
882 if (vap->va_gid == (gid_t)VNOVAL)
883 sp->sa_gid = nfs_xdrneg1;
885 sp->sa_gid = txdr_unsigned(vap->va_gid);
886 sp->sa_size = txdr_unsigned(vap->va_size);
887 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
888 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
890 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_SETATTR, td, cred, &error));
893 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag));
895 ERROROUT(nfsm_loadattr(&info, vp, NULL));
905 nfs_cache_setvp(struct nchandle *nch, struct vnode *vp, int nctimeout)
911 cache_setvp(nch, vp);
912 cache_settimeout(nch, nctimeout);
916 * NEW API CALL - replaces nfs_lookup(). However, we cannot remove
917 * nfs_lookup() until all remaining new api calls are implemented.
919 * Resolve a namecache entry. This function is passed a locked ncp and
920 * must call nfs_cache_setvp() on it as appropriate to resolve the entry.
923 nfs_nresolve(struct vop_nresolve_args *ap)
925 struct thread *td = curthread;
926 struct namecache *ncp;
927 struct nfsmount *nmp;
937 struct nfsm_info info;
940 nmp = VFSTONFS(dvp->v_mount);
942 lwkt_gettoken(&nmp->nm_token);
944 if ((error = vget(dvp, LK_SHARED)) != 0) {
945 lwkt_reltoken(&nmp->nm_token);
950 info.v3 = NFS_ISV3(dvp);
953 nfsstats.lookupcache_misses++;
954 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
955 ncp = ap->a_nch->ncp;
957 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP,
958 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len));
959 ERROROUT(nfsm_fhtom(&info, dvp));
960 ERROROUT(nfsm_strtom(&info, ncp->nc_name, len, NFS_MAXNAMLEN));
961 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, td,
962 ap->a_cred, &error));
965 * Cache negatve lookups to reduce NFS traffic, but use
966 * a fast timeout. Otherwise use a timeout of 1 tick.
967 * XXX we should add a namecache flag for no-caching
968 * to uncache the negative hit as soon as possible, but
969 * we cannot simply destroy the entry because it is used
970 * as a placeholder by the caller.
972 * The refactored nfs code will overwrite a non-zero error
973 * with 0 when we use ERROROUT(), so don't here.
976 nfs_cache_setvp(ap->a_nch, NULL, nfsneg_cache_timeout);
977 tmp_error = nfsm_postop_attr(&info, dvp, &attrflag,
989 * Success, get the file handle, do various checks, and load
990 * post-operation data from the reply packet. Theoretically
991 * we should never be looking up "." so, theoretically, we
992 * should never get the same file handle as our directory. But
993 * we check anyway. XXX
995 * Note that no timeout is set for the positive cache hit. We
996 * assume, theoretically, that ESTALE returns will be dealt with
997 * properly to handle NFS races and in anycase we cannot depend
998 * on a timeout to deal with NFS open/create/excl issues so instead
999 * of a bad hack here the rest of the NFS client code needs to do
1002 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp));
1005 if (NFS_CMPFH(np, fhp, fhsize)) {
1009 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np, NULL);
1014 lwkt_reltoken(&nmp->nm_token);
1020 ERROROUT(nfsm_postop_attr(&info, nvp, &attrflag,
1021 NFS_LATTR_NOSHRINK));
1022 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag,
1023 NFS_LATTR_NOSHRINK));
1025 ERROROUT(nfsm_loadattr(&info, nvp, NULL));
1027 nfs_cache_setvp(ap->a_nch, nvp, nfspos_cache_timeout);
1031 lwkt_reltoken(&nmp->nm_token);
1043 * 'cached' nfs directory lookup
1045 * NOTE: cannot be removed until NFS implements all the new n*() API calls.
1047 * nfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
1048 * struct componentname *a_cnp)
1051 nfs_lookup(struct vop_old_lookup_args *ap)
1053 struct componentname *cnp = ap->a_cnp;
1054 struct vnode *dvp = ap->a_dvp;
1055 struct vnode **vpp = ap->a_vpp;
1056 int flags = cnp->cn_flags;
1057 struct vnode *newvp;
1058 struct vnode *notvp;
1059 struct nfsmount *nmp;
1063 int lockparent, wantparent, attrflag, fhsize;
1066 struct nfsm_info info;
1069 info.v3 = NFS_ISV3(dvp);
1072 notvp = (cnp->cn_flags & CNP_NOTVP) ? cnp->cn_notvp : NULL;
1075 * Read-only mount check and directory check.
1078 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) &&
1079 (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME))
1082 if (dvp->v_type != VDIR)
1086 * Look it up in the cache. Note that ENOENT is only returned if we
1087 * previously entered a negative hit (see later on). The additional
1088 * nfsneg_cache_timeout check causes previously cached results to
1089 * be instantly ignored if the negative caching is turned off.
1091 lockparent = flags & CNP_LOCKPARENT;
1092 wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT);
1093 nmp = VFSTONFS(dvp->v_mount);
1096 lwkt_gettoken(&nmp->nm_token);
1103 nfsstats.lookupcache_misses++;
1104 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
1105 len = cnp->cn_namelen;
1106 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP,
1107 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len));
1108 ERROROUT(nfsm_fhtom(&info, dvp));
1109 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, len, NFS_MAXNAMLEN));
1110 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, cnp->cn_td,
1111 cnp->cn_cred, &error));
1113 tmp_error = nfsm_postop_attr(&info, dvp, &attrflag,
1114 NFS_LATTR_NOSHRINK);
1124 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp));
1127 * Handle RENAME case...
1129 if (cnp->cn_nameiop == NAMEI_RENAME && wantparent) {
1130 if (NFS_CMPFH(np, fhp, fhsize)) {
1133 lwkt_reltoken(&nmp->nm_token);
1136 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np, notvp);
1140 lwkt_reltoken(&nmp->nm_token);
1145 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag,
1146 NFS_LATTR_NOSHRINK));
1147 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag,
1148 NFS_LATTR_NOSHRINK));
1150 ERROROUT(nfsm_loadattr(&info, newvp, NULL));
1157 cnp->cn_flags |= CNP_PDIRUNLOCK;
1159 lwkt_reltoken(&nmp->nm_token);
1163 if (flags & CNP_ISDOTDOT) {
1165 cnp->cn_flags |= CNP_PDIRUNLOCK;
1166 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np, notvp);
1168 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
1169 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
1170 lwkt_reltoken(&nmp->nm_token);
1171 return (error); /* NOTE: return error from nget */
1175 error = vn_lock(dvp, LK_EXCLUSIVE);
1178 lwkt_reltoken(&nmp->nm_token);
1181 cnp->cn_flags |= CNP_PDIRUNLOCK;
1183 } else if (NFS_CMPFH(np, fhp, fhsize)) {
1187 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np, notvp);
1191 lwkt_reltoken(&nmp->nm_token);
1196 cnp->cn_flags |= CNP_PDIRUNLOCK;
1201 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag,
1202 NFS_LATTR_NOSHRINK));
1203 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag,
1204 NFS_LATTR_NOSHRINK));
1206 ERROROUT(nfsm_loadattr(&info, newvp, NULL));
1209 /* XXX MOVE TO nfs_nremove() */
1210 if ((cnp->cn_flags & CNP_MAKEENTRY) &&
1211 cnp->cn_nameiop != NAMEI_DELETE) {
1212 np->n_ctime = np->n_vattr.va_ctime.tv_sec; /* XXX */
1220 if (newvp != NULLVP) {
1224 if ((cnp->cn_nameiop == NAMEI_CREATE ||
1225 cnp->cn_nameiop == NAMEI_RENAME) &&
1229 cnp->cn_flags |= CNP_PDIRUNLOCK;
1231 if (dvp->v_mount->mnt_flag & MNT_RDONLY)
1234 error = EJUSTRETURN;
1237 lwkt_reltoken(&nmp->nm_token);
1243 * Just call nfs_bioread() to do the work.
1245 * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1246 * struct ucred *a_cred)
1249 nfs_read(struct vop_read_args *ap)
1251 struct vnode *vp = ap->a_vp;
1252 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1255 lwkt_gettoken(&nmp->nm_token);
1256 error = nfs_bioread(vp, ap->a_uio, ap->a_ioflag);
1257 lwkt_reltoken(&nmp->nm_token);
1265 * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
1268 nfs_readlink(struct vop_readlink_args *ap)
1270 struct vnode *vp = ap->a_vp;
1271 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1274 if (vp->v_type != VLNK)
1277 lwkt_gettoken(&nmp->nm_token);
1278 error = nfs_bioread(vp, ap->a_uio, 0);
1279 lwkt_reltoken(&nmp->nm_token);
1285 * Do a readlink rpc.
1286 * Called by nfs_doio() from below the buffer cache.
1289 nfs_readlinkrpc_uio(struct vnode *vp, struct uio *uiop)
1291 int error = 0, len, attrflag;
1292 struct nfsm_info info;
1295 info.v3 = NFS_ISV3(vp);
1297 nfsstats.rpccnt[NFSPROC_READLINK]++;
1298 nfsm_reqhead(&info, vp, NFSPROC_READLINK, NFSX_FH(info.v3));
1299 ERROROUT(nfsm_fhtom(&info, vp));
1300 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READLINK, uiop->uio_td,
1301 nfs_vpcred(vp, ND_CHECK), &error));
1303 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag,
1304 NFS_LATTR_NOSHRINK));
1307 NEGATIVEOUT(len = nfsm_strsiz(&info, NFS_MAXPATHLEN));
1308 if (len == NFS_MAXPATHLEN) {
1309 struct nfsnode *np = VTONFS(vp);
1310 if (np->n_size && np->n_size < NFS_MAXPATHLEN)
1313 ERROROUT(nfsm_mtouio(&info, uiop, len));
1322 * nfs synchronous read rpc using UIO
1325 nfs_readrpc_uio(struct vnode *vp, struct uio *uiop)
1328 struct nfsmount *nmp;
1329 int error = 0, len, retlen, tsiz, eof, attrflag;
1330 struct nfsm_info info;
1334 info.v3 = NFS_ISV3(vp);
1339 nmp = VFSTONFS(vp->v_mount);
1341 tsiz = uiop->uio_resid;
1342 tmp_off = uiop->uio_offset + tsiz;
1343 if (tmp_off > nmp->nm_maxfilesize || tmp_off < uiop->uio_offset)
1345 tmp_off = uiop->uio_offset;
1347 nfsstats.rpccnt[NFSPROC_READ]++;
1348 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
1349 nfsm_reqhead(&info, vp, NFSPROC_READ,
1350 NFSX_FH(info.v3) + NFSX_UNSIGNED * 3);
1351 ERROROUT(nfsm_fhtom(&info, vp));
1352 tl = nfsm_build(&info, NFSX_UNSIGNED * 3);
1354 txdr_hyper(uiop->uio_offset, tl);
1355 *(tl + 2) = txdr_unsigned(len);
1357 *tl++ = txdr_unsigned(uiop->uio_offset);
1358 *tl++ = txdr_unsigned(len);
1361 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READ, uiop->uio_td,
1362 nfs_vpcred(vp, ND_READ), &error));
1364 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag,
1365 NFS_LATTR_NOSHRINK));
1366 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED));
1367 eof = fxdr_unsigned(int, *(tl + 1));
1369 ERROROUT(nfsm_loadattr(&info, vp, NULL));
1371 NEGATIVEOUT(retlen = nfsm_strsiz(&info, len));
1372 ERROROUT(nfsm_mtouio(&info, uiop, retlen));
1377 * Handle short-read from server (NFSv3). If EOF is not
1378 * flagged (and no error occurred), but retlen is less
1379 * then the request size, we must zero-fill the remainder.
1381 if (retlen < len && info.v3 && eof == 0) {
1382 ERROROUT(uiomovez(len - retlen, uiop));
1388 * Terminate loop on EOF or zero-length read.
1390 * For NFSv2 a short-read indicates EOF, not zero-fill,
1391 * and also terminates the loop.
1394 if (eof || retlen == 0)
1396 } else if (retlen < len) {
1408 nfs_writerpc_uio(struct vnode *vp, struct uio *uiop,
1409 int *iomode, int *must_commit)
1413 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1414 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
1415 int committed = NFSV3WRITE_FILESYNC;
1416 struct nfsm_info info;
1419 info.v3 = NFS_ISV3(vp);
1422 if (uiop->uio_iovcnt != 1)
1423 panic("nfs: writerpc iovcnt > 1");
1426 tsiz = uiop->uio_resid;
1427 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1430 nfsstats.rpccnt[NFSPROC_WRITE]++;
1431 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1432 nfsm_reqhead(&info, vp, NFSPROC_WRITE,
1433 NFSX_FH(info.v3) + 5 * NFSX_UNSIGNED +
1435 ERROROUT(nfsm_fhtom(&info, vp));
1437 tl = nfsm_build(&info, 5 * NFSX_UNSIGNED);
1438 txdr_hyper(uiop->uio_offset, tl);
1440 *tl++ = txdr_unsigned(len);
1441 *tl++ = txdr_unsigned(*iomode);
1442 *tl = txdr_unsigned(len);
1446 tl = nfsm_build(&info, 4 * NFSX_UNSIGNED);
1447 /* Set both "begin" and "current" to non-garbage. */
1448 x = txdr_unsigned((u_int32_t)uiop->uio_offset);
1449 *tl++ = x; /* "begin offset" */
1450 *tl++ = x; /* "current offset" */
1451 x = txdr_unsigned(len);
1452 *tl++ = x; /* total to this offset */
1453 *tl = x; /* size of this write */
1455 ERROROUT(nfsm_uiotom(&info, uiop, len));
1456 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_WRITE, uiop->uio_td,
1457 nfs_vpcred(vp, ND_WRITE), &error));
1460 * The write RPC returns a before and after mtime. The
1461 * nfsm_wcc_data() macro checks the before n_mtime
1462 * against the before time and stores the after time
1463 * in the nfsnode's cached vattr and n_mtime field.
1464 * The NRMODIFIED bit will be set if the before
1465 * time did not match the original mtime.
1467 wccflag = NFSV3_WCCCHK;
1468 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag));
1470 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED + NFSX_V3WRITEVERF));
1471 rlen = fxdr_unsigned(int, *tl++);
1477 } else if (rlen < len) {
1478 backup = len - rlen;
1479 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base - backup;
1480 uiop->uio_iov->iov_len += backup;
1481 uiop->uio_offset -= backup;
1482 uiop->uio_resid += backup;
1485 commit = fxdr_unsigned(int, *tl++);
1488 * Return the lowest committment level
1489 * obtained by any of the RPCs.
1491 if (committed == NFSV3WRITE_FILESYNC)
1493 else if (committed == NFSV3WRITE_DATASYNC &&
1494 commit == NFSV3WRITE_UNSTABLE)
1496 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){
1497 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1499 nmp->nm_state |= NFSSTA_HASWRITEVERF;
1500 } else if (bcmp((caddr_t)tl,
1501 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1503 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1508 ERROROUT(nfsm_loadattr(&info, vp, NULL));
1517 if (vp->v_mount->mnt_flag & MNT_ASYNC)
1518 committed = NFSV3WRITE_FILESYNC;
1519 *iomode = committed;
1521 uiop->uio_resid = tsiz;
1527 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1528 * mode set to specify the file type and the size field for rdev.
1531 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1534 struct nfsv2_sattr *sp;
1536 struct vnode *newvp = NULL;
1537 struct nfsnode *np = NULL;
1539 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
1541 struct nfsm_info info;
1544 info.v3 = NFS_ISV3(dvp);
1546 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1547 rmajor = txdr_unsigned(vap->va_rmajor);
1548 rminor = txdr_unsigned(vap->va_rminor);
1549 } else if (vap->va_type == VFIFO || vap->va_type == VSOCK) {
1550 rmajor = nfs_xdrneg1;
1551 rminor = nfs_xdrneg1;
1553 return (EOPNOTSUPP);
1555 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
1558 nfsstats.rpccnt[NFSPROC_MKNOD]++;
1559 nfsm_reqhead(&info, dvp, NFSPROC_MKNOD,
1560 NFSX_FH(info.v3) + 4 * NFSX_UNSIGNED +
1561 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(info.v3));
1562 ERROROUT(nfsm_fhtom(&info, dvp));
1563 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen,
1566 tl = nfsm_build(&info, NFSX_UNSIGNED);
1567 *tl++ = vtonfsv3_type(vap->va_type);
1568 nfsm_v3attrbuild(&info, vap, FALSE);
1569 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1570 tl = nfsm_build(&info, 2 * NFSX_UNSIGNED);
1571 *tl++ = txdr_unsigned(vap->va_rmajor);
1572 *tl = txdr_unsigned(vap->va_rminor);
1575 sp = nfsm_build(&info, NFSX_V2SATTR);
1576 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1577 sp->sa_uid = nfs_xdrneg1;
1578 sp->sa_gid = nfs_xdrneg1;
1579 sp->sa_size = makeudev(rmajor, rminor);
1580 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1581 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1583 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_MKNOD, cnp->cn_td,
1584 cnp->cn_cred, &error));
1586 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp));
1592 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1593 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1599 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag));
1610 VTONFS(dvp)->n_flag |= NLMODIFIED;
1612 VTONFS(dvp)->n_attrstamp = 0;
1618 * just call nfs_mknodrpc() to do the work.
1620 * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
1621 * struct componentname *a_cnp, struct vattr *a_vap)
1625 nfs_mknod(struct vop_old_mknod_args *ap)
1627 struct nfsmount *nmp = VFSTONFS(ap->a_dvp->v_mount);
1630 lwkt_gettoken(&nmp->nm_token);
1631 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1632 lwkt_reltoken(&nmp->nm_token);
1637 static u_long create_verf;
1639 * nfs file create call
1641 * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
1642 * struct componentname *a_cnp, struct vattr *a_vap)
1645 nfs_create(struct vop_old_create_args *ap)
1647 struct vnode *dvp = ap->a_dvp;
1648 struct vattr *vap = ap->a_vap;
1649 struct nfsmount *nmp = VFSTONFS(dvp->v_mount);
1650 struct componentname *cnp = ap->a_cnp;
1651 struct nfsv2_sattr *sp;
1653 struct nfsnode *np = NULL;
1654 struct vnode *newvp = NULL;
1655 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
1657 struct nfsm_info info;
1660 info.v3 = NFS_ISV3(dvp);
1661 lwkt_gettoken(&nmp->nm_token);
1664 * Oops, not for me..
1666 if (vap->va_type == VSOCK) {
1667 error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap);
1668 lwkt_reltoken(&nmp->nm_token);
1672 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
1673 lwkt_reltoken(&nmp->nm_token);
1676 if (vap->va_vaflags & VA_EXCLUSIVE)
1679 nfsstats.rpccnt[NFSPROC_CREATE]++;
1680 nfsm_reqhead(&info, dvp, NFSPROC_CREATE,
1681 NFSX_FH(info.v3) + 2 * NFSX_UNSIGNED +
1682 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(info.v3));
1683 ERROROUT(nfsm_fhtom(&info, dvp));
1684 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen,
1687 tl = nfsm_build(&info, NFSX_UNSIGNED);
1688 if (fmode & O_EXCL) {
1689 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
1690 tl = nfsm_build(&info, NFSX_V3CREATEVERF);
1692 if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid]))
1693 *tl++ = IA_SIN(TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia)->sin_addr.s_addr;
1696 *tl++ = create_verf;
1697 *tl = ++create_verf;
1699 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
1700 nfsm_v3attrbuild(&info, vap, FALSE);
1703 sp = nfsm_build(&info, NFSX_V2SATTR);
1704 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1705 sp->sa_uid = nfs_xdrneg1;
1706 sp->sa_gid = nfs_xdrneg1;
1708 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1709 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1711 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_CREATE, cnp->cn_td,
1712 cnp->cn_cred, &error));
1714 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp));
1720 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1721 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1728 error = nfsm_wcc_data(&info, dvp, &wccflag);
1730 (void)nfsm_wcc_data(&info, dvp, &wccflag);
1736 if (info.v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
1737 KKASSERT(newvp == NULL);
1741 } else if (info.v3 && (fmode & O_EXCL)) {
1743 * We are normally called with only a partially initialized
1744 * VAP. Since the NFSv3 spec says that server may use the
1745 * file attributes to store the verifier, the spec requires
1746 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1747 * in atime, but we can't really assume that all servers will
1748 * so we ensure that our SETATTR sets both atime and mtime.
1750 if (vap->va_mtime.tv_sec == VNOVAL)
1751 vfs_timestamp(&vap->va_mtime);
1752 if (vap->va_atime.tv_sec == VNOVAL)
1753 vap->va_atime = vap->va_mtime;
1754 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td);
1758 * The new np may have enough info for access
1759 * checks, make sure rucred and wucred are
1760 * initialized for read and write rpc's.
1763 if (np->n_rucred == NULL)
1764 np->n_rucred = crhold(cnp->cn_cred);
1765 if (np->n_wucred == NULL)
1766 np->n_wucred = crhold(cnp->cn_cred);
1771 VTONFS(dvp)->n_flag |= NLMODIFIED;
1773 VTONFS(dvp)->n_attrstamp = 0;
1774 lwkt_reltoken(&nmp->nm_token);
1779 * nfs file remove call
1780 * To try and make nfs semantics closer to ufs semantics, a file that has
1781 * other processes using the vnode is renamed instead of removed and then
1782 * removed later on the last close.
1783 * - If v_sysref.refcnt > 1
1784 * If a rename is not already in the works
1785 * call nfs_sillyrename() to set it up
1789 * nfs_remove(struct vnode *a_dvp, struct vnode *a_vp,
1790 * struct componentname *a_cnp)
1793 nfs_remove(struct vop_old_remove_args *ap)
1795 struct vnode *vp = ap->a_vp;
1796 struct vnode *dvp = ap->a_dvp;
1797 struct nfsmount *nmp = VFSTONFS(dvp->v_mount);
1798 struct componentname *cnp = ap->a_cnp;
1799 struct nfsnode *np = VTONFS(vp);
1803 lwkt_gettoken(&nmp->nm_token);
1805 if (vp->v_sysref.refcnt < 1)
1806 panic("nfs_remove: bad v_sysref.refcnt");
1808 if (vp->v_type == VDIR) {
1810 } else if (vp->v_sysref.refcnt == 1 || (np->n_sillyrename &&
1811 VOP_GETATTR(vp, &vattr) == 0 && vattr.va_nlink > 1)) {
1813 * throw away biocache buffers, mainly to avoid
1814 * unnecessary delayed writes later.
1816 error = nfs_vinvalbuf(vp, 0, 1);
1819 error = nfs_removerpc(dvp, cnp->cn_nameptr,
1820 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td);
1822 * Kludge City: If the first reply to the remove rpc is lost..
1823 * the reply to the retransmitted request will be ENOENT
1824 * since the file was in fact removed
1825 * Therefore, we cheat and return success.
1827 if (error == ENOENT)
1829 } else if (!np->n_sillyrename) {
1830 error = nfs_sillyrename(dvp, vp, cnp);
1832 np->n_attrstamp = 0;
1833 lwkt_reltoken(&nmp->nm_token);
1839 * nfs file remove rpc called from nfs_inactive
1842 nfs_removeit(struct sillyrename *sp)
1844 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen,
1849 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1852 nfs_removerpc(struct vnode *dvp, const char *name, int namelen,
1853 struct ucred *cred, struct thread *td)
1855 int error = 0, wccflag = NFSV3_WCCRATTR;
1856 struct nfsm_info info;
1859 info.v3 = NFS_ISV3(dvp);
1861 nfsstats.rpccnt[NFSPROC_REMOVE]++;
1862 nfsm_reqhead(&info, dvp, NFSPROC_REMOVE,
1863 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1864 ERROROUT(nfsm_fhtom(&info, dvp));
1865 ERROROUT(nfsm_strtom(&info, name, namelen, NFS_MAXNAMLEN));
1866 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_REMOVE, td, cred, &error));
1868 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag));
1873 VTONFS(dvp)->n_flag |= NLMODIFIED;
1875 VTONFS(dvp)->n_attrstamp = 0;
1880 * nfs file rename call
1882 * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
1883 * struct componentname *a_fcnp, struct vnode *a_tdvp,
1884 * struct vnode *a_tvp, struct componentname *a_tcnp)
1887 nfs_rename(struct vop_old_rename_args *ap)
1889 struct vnode *fvp = ap->a_fvp;
1890 struct vnode *tvp = ap->a_tvp;
1891 struct vnode *fdvp = ap->a_fdvp;
1892 struct vnode *tdvp = ap->a_tdvp;
1893 struct componentname *tcnp = ap->a_tcnp;
1894 struct componentname *fcnp = ap->a_fcnp;
1895 struct nfsmount *nmp = VFSTONFS(fdvp->v_mount);
1898 lwkt_gettoken(&nmp->nm_token);
1900 /* Check for cross-device rename */
1901 if ((fvp->v_mount != tdvp->v_mount) ||
1902 (tvp && (fvp->v_mount != tvp->v_mount))) {
1908 * We shouldn't have to flush fvp on rename for most server-side
1909 * filesystems as the file handle should not change. Unfortunately
1910 * the inode for some filesystems (msdosfs) might be tied to the
1911 * file name or directory position so to be completely safe
1912 * vfs.nfs.flush_on_rename is set by default. Clear to improve
1915 * We must flush tvp on rename because it might become stale on the
1916 * server after the rename.
1918 if (nfs_flush_on_rename)
1919 VOP_FSYNC(fvp, MNT_WAIT, 0);
1921 VOP_FSYNC(tvp, MNT_WAIT, 0);
1924 * If the tvp exists and is in use, sillyrename it before doing the
1925 * rename of the new file over it.
1927 * XXX Can't sillyrename a directory.
1929 * We do not attempt to do any namecache purges in this old API
1930 * routine. The new API compat functions have access to the actual
1931 * namecache structures and will do it for us.
1933 if (tvp && tvp->v_sysref.refcnt > 1 && !VTONFS(tvp)->n_sillyrename &&
1934 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1941 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1942 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1946 lwkt_reltoken(&nmp->nm_token);
1956 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1958 if (error == ENOENT)
1964 * nfs file rename rpc called from nfs_remove() above
1967 nfs_renameit(struct vnode *sdvp, struct componentname *scnp,
1968 struct sillyrename *sp)
1970 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
1971 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td));
1975 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1978 nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen,
1979 struct vnode *tdvp, const char *tnameptr, int tnamelen,
1980 struct ucred *cred, struct thread *td)
1982 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
1983 struct nfsm_info info;
1986 info.v3 = NFS_ISV3(fdvp);
1988 nfsstats.rpccnt[NFSPROC_RENAME]++;
1989 nfsm_reqhead(&info, fdvp, NFSPROC_RENAME,
1990 (NFSX_FH(info.v3) + NFSX_UNSIGNED)*2 +
1991 nfsm_rndup(fnamelen) + nfsm_rndup(tnamelen));
1992 ERROROUT(nfsm_fhtom(&info, fdvp));
1993 ERROROUT(nfsm_strtom(&info, fnameptr, fnamelen, NFS_MAXNAMLEN));
1994 ERROROUT(nfsm_fhtom(&info, tdvp));
1995 ERROROUT(nfsm_strtom(&info, tnameptr, tnamelen, NFS_MAXNAMLEN));
1996 NEGKEEPOUT(nfsm_request(&info, fdvp, NFSPROC_RENAME, td, cred, &error));
1998 ERROROUT(nfsm_wcc_data(&info, fdvp, &fwccflag));
1999 ERROROUT(nfsm_wcc_data(&info, tdvp, &twccflag));
2004 VTONFS(fdvp)->n_flag |= NLMODIFIED;
2005 VTONFS(tdvp)->n_flag |= NLMODIFIED;
2007 VTONFS(fdvp)->n_attrstamp = 0;
2009 VTONFS(tdvp)->n_attrstamp = 0;
2014 * nfs hard link create call
2016 * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp,
2017 * struct componentname *a_cnp)
2020 nfs_link(struct vop_old_link_args *ap)
2022 struct vnode *vp = ap->a_vp;
2023 struct vnode *tdvp = ap->a_tdvp;
2024 struct nfsmount *nmp = VFSTONFS(tdvp->v_mount);
2025 struct componentname *cnp = ap->a_cnp;
2026 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
2027 struct nfsm_info info;
2029 if (vp->v_mount != tdvp->v_mount) {
2032 lwkt_gettoken(&nmp->nm_token);
2035 * The attribute cache may get out of sync with the server on link.
2036 * Pushing writes to the server before handle was inherited from
2037 * long long ago and it is unclear if we still need to do this.
2040 if (nfs_flush_on_hlink)
2041 VOP_FSYNC(vp, MNT_WAIT, 0);
2044 info.v3 = NFS_ISV3(vp);
2046 nfsstats.rpccnt[NFSPROC_LINK]++;
2047 nfsm_reqhead(&info, vp, NFSPROC_LINK,
2048 NFSX_FH(info.v3) * 2 + NFSX_UNSIGNED +
2049 nfsm_rndup(cnp->cn_namelen));
2050 ERROROUT(nfsm_fhtom(&info, vp));
2051 ERROROUT(nfsm_fhtom(&info, tdvp));
2052 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen,
2054 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_LINK, cnp->cn_td,
2055 cnp->cn_cred, &error));
2057 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag,
2058 NFS_LATTR_NOSHRINK));
2059 ERROROUT(nfsm_wcc_data(&info, tdvp, &wccflag));
2064 VTONFS(tdvp)->n_flag |= NLMODIFIED;
2066 VTONFS(vp)->n_attrstamp = 0;
2068 VTONFS(tdvp)->n_attrstamp = 0;
2070 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
2072 if (error == EEXIST)
2074 lwkt_reltoken(&nmp->nm_token);
2079 * nfs symbolic link create call
2081 * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
2082 * struct componentname *a_cnp, struct vattr *a_vap,
2086 nfs_symlink(struct vop_old_symlink_args *ap)
2088 struct vnode *dvp = ap->a_dvp;
2089 struct vattr *vap = ap->a_vap;
2090 struct nfsmount *nmp = VFSTONFS(dvp->v_mount);
2091 struct componentname *cnp = ap->a_cnp;
2092 struct nfsv2_sattr *sp;
2093 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
2094 struct vnode *newvp = NULL;
2095 struct nfsm_info info;
2098 info.v3 = NFS_ISV3(dvp);
2099 lwkt_gettoken(&nmp->nm_token);
2101 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
2102 slen = strlen(ap->a_target);
2103 nfsm_reqhead(&info, dvp, NFSPROC_SYMLINK,
2104 NFSX_FH(info.v3) + 2*NFSX_UNSIGNED +
2105 nfsm_rndup(cnp->cn_namelen) +
2106 nfsm_rndup(slen) + NFSX_SATTR(info.v3));
2107 ERROROUT(nfsm_fhtom(&info, dvp));
2108 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen,
2111 nfsm_v3attrbuild(&info, vap, FALSE);
2113 ERROROUT(nfsm_strtom(&info, ap->a_target, slen, NFS_MAXPATHLEN));
2115 sp = nfsm_build(&info, NFSX_V2SATTR);
2116 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
2117 sp->sa_uid = nfs_xdrneg1;
2118 sp->sa_gid = nfs_xdrneg1;
2119 sp->sa_size = nfs_xdrneg1;
2120 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
2121 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
2125 * Issue the NFS request and get the rpc response.
2127 * Only NFSv3 responses returning an error of 0 actually return
2128 * a file handle that can be converted into newvp without having
2129 * to do an extra lookup rpc.
2131 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_SYMLINK, cnp->cn_td,
2132 cnp->cn_cred, &error));
2135 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp));
2137 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag));
2141 * out code jumps -> here, mrep is also freed.
2149 * If we get an EEXIST error, silently convert it to no-error
2150 * in case of an NFS retry.
2152 if (error == EEXIST)
2156 * If we do not have (or no longer have) an error, and we could
2157 * not extract the newvp from the response due to the request being
2158 * NFSv2 or the error being EEXIST. We have to do a lookup in order
2159 * to obtain a newvp to return.
2161 if (error == 0 && newvp == NULL) {
2162 struct nfsnode *np = NULL;
2164 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
2165 cnp->cn_cred, cnp->cn_td, &np);
2175 VTONFS(dvp)->n_flag |= NLMODIFIED;
2177 VTONFS(dvp)->n_attrstamp = 0;
2178 lwkt_reltoken(&nmp->nm_token);
2186 * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
2187 * struct componentname *a_cnp, struct vattr *a_vap)
2190 nfs_mkdir(struct vop_old_mkdir_args *ap)
2192 struct vnode *dvp = ap->a_dvp;
2193 struct vattr *vap = ap->a_vap;
2194 struct nfsmount *nmp = VFSTONFS(dvp->v_mount);
2195 struct componentname *cnp = ap->a_cnp;
2196 struct nfsv2_sattr *sp;
2197 struct nfsnode *np = NULL;
2198 struct vnode *newvp = NULL;
2200 int error = 0, wccflag = NFSV3_WCCRATTR;
2203 struct nfsm_info info;
2206 info.v3 = NFS_ISV3(dvp);
2207 lwkt_gettoken(&nmp->nm_token);
2209 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
2210 lwkt_reltoken(&nmp->nm_token);
2213 len = cnp->cn_namelen;
2214 nfsstats.rpccnt[NFSPROC_MKDIR]++;
2215 nfsm_reqhead(&info, dvp, NFSPROC_MKDIR,
2216 NFSX_FH(info.v3) + NFSX_UNSIGNED +
2217 nfsm_rndup(len) + NFSX_SATTR(info.v3));
2218 ERROROUT(nfsm_fhtom(&info, dvp));
2219 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, len, NFS_MAXNAMLEN));
2221 nfsm_v3attrbuild(&info, vap, FALSE);
2223 sp = nfsm_build(&info, NFSX_V2SATTR);
2224 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
2225 sp->sa_uid = nfs_xdrneg1;
2226 sp->sa_gid = nfs_xdrneg1;
2227 sp->sa_size = nfs_xdrneg1;
2228 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
2229 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
2231 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_MKDIR, cnp->cn_td,
2232 cnp->cn_cred, &error));
2234 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp));
2237 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag));
2242 VTONFS(dvp)->n_flag |= NLMODIFIED;
2244 VTONFS(dvp)->n_attrstamp = 0;
2246 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
2247 * if we can succeed in looking up the directory.
2249 if (error == EEXIST || (!error && !gotvp)) {
2254 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
2258 if (newvp->v_type != VDIR)
2268 lwkt_reltoken(&nmp->nm_token);
2273 * nfs remove directory call
2275 * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
2276 * struct componentname *a_cnp)
2279 nfs_rmdir(struct vop_old_rmdir_args *ap)
2281 struct vnode *vp = ap->a_vp;
2282 struct vnode *dvp = ap->a_dvp;
2283 struct nfsmount *nmp = VFSTONFS(dvp->v_mount);
2284 struct componentname *cnp = ap->a_cnp;
2285 int error = 0, wccflag = NFSV3_WCCRATTR;
2286 struct nfsm_info info;
2289 info.v3 = NFS_ISV3(dvp);
2294 lwkt_gettoken(&nmp->nm_token);
2296 nfsstats.rpccnt[NFSPROC_RMDIR]++;
2297 nfsm_reqhead(&info, dvp, NFSPROC_RMDIR,
2298 NFSX_FH(info.v3) + NFSX_UNSIGNED +
2299 nfsm_rndup(cnp->cn_namelen));
2300 ERROROUT(nfsm_fhtom(&info, dvp));
2301 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen,
2303 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_RMDIR, cnp->cn_td,
2304 cnp->cn_cred, &error));
2306 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag));
2311 VTONFS(dvp)->n_flag |= NLMODIFIED;
2313 VTONFS(dvp)->n_attrstamp = 0;
2315 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2317 if (error == ENOENT)
2319 lwkt_reltoken(&nmp->nm_token);
2327 * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
2330 nfs_readdir(struct vop_readdir_args *ap)
2332 struct vnode *vp = ap->a_vp;
2333 struct nfsnode *np = VTONFS(vp);
2334 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2335 struct uio *uio = ap->a_uio;
2339 if (vp->v_type != VDIR)
2342 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0)
2345 lwkt_gettoken(&nmp->nm_token);
2348 * If we have a valid EOF offset cache we must call VOP_GETATTR()
2349 * and then check that is still valid, or if this is an NQNFS mount
2350 * we call NQNFS_CKCACHEABLE() instead of VOP_GETATTR(). Note that
2351 * VOP_GETATTR() does not necessarily go to the wire.
2353 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2354 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0) {
2355 if (VOP_GETATTR(vp, &vattr) == 0 &&
2356 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0
2358 nfsstats.direofcache_hits++;
2364 * Call nfs_bioread() to do the real work. nfs_bioread() does its
2365 * own cache coherency checks so we do not have to.
2367 tresid = uio->uio_resid;
2368 error = nfs_bioread(vp, uio, 0);
2370 if (!error && uio->uio_resid == tresid)
2371 nfsstats.direofcache_misses++;
2373 lwkt_reltoken(&nmp->nm_token);
2380 * Readdir rpc call. nfs_bioread->nfs_doio->nfs_readdirrpc.
2382 * Note that for directories, nfs_bioread maintains the underlying nfs-centric
2383 * offset/block and converts the nfs formatted directory entries for userland
2384 * consumption as well as deals with offsets into the middle of blocks.
2385 * nfs_doio only deals with logical blocks. In particular, uio_offset will
2386 * be block-bounded. It must convert to cookies for the actual RPC.
2389 nfs_readdirrpc_uio(struct vnode *vp, struct uio *uiop)
2392 struct nfs_dirent *dp = NULL;
2397 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2398 struct nfsnode *dnp = VTONFS(vp);
2400 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2402 struct nfsm_info info;
2405 info.v3 = NFS_ISV3(vp);
2408 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2409 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2410 panic("nfs readdirrpc bad uio");
2414 * If there is no cookie, assume directory was stale.
2416 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2420 return (NFSERR_BAD_COOKIE);
2422 * Loop around doing readdir rpc's of size nm_readdirsize
2423 * truncated to a multiple of DIRBLKSIZ.
2424 * The stopping criteria is EOF or buffer full.
2426 while (more_dirs && bigenough) {
2427 nfsstats.rpccnt[NFSPROC_READDIR]++;
2428 nfsm_reqhead(&info, vp, NFSPROC_READDIR,
2429 NFSX_FH(info.v3) + NFSX_READDIR(info.v3));
2430 ERROROUT(nfsm_fhtom(&info, vp));
2432 tl = nfsm_build(&info, 5 * NFSX_UNSIGNED);
2433 *tl++ = cookie.nfsuquad[0];
2434 *tl++ = cookie.nfsuquad[1];
2435 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2436 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2439 * WARNING! HAMMER DIRECTORIES WILL NOT WORK WELL
2440 * WITH NFSv2!!! There's nothing I can really do
2441 * about it other than to hope the server supports
2444 tl = nfsm_build(&info, 2 * NFSX_UNSIGNED);
2445 *tl++ = cookie.nfsuquad[0];
2447 *tl = txdr_unsigned(nmp->nm_readdirsize);
2448 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READDIR,
2450 nfs_vpcred(vp, ND_READ), &error));
2452 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag,
2453 NFS_LATTR_NOSHRINK));
2454 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED));
2455 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2456 dnp->n_cookieverf.nfsuquad[1] = *tl;
2458 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
2459 more_dirs = fxdr_unsigned(int, *tl);
2461 /* loop thru the dir entries, converting them to std form */
2462 while (more_dirs && bigenough) {
2464 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
2465 fileno = fxdr_hyper(tl);
2466 len = fxdr_unsigned(int, *(tl + 2));
2468 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED));
2469 fileno = fxdr_unsigned(u_quad_t, *tl++);
2470 len = fxdr_unsigned(int, *tl);
2472 if (len <= 0 || len > NFS_MAXNAMLEN) {
2480 * len is the number of bytes in the path element
2481 * name, not including the \0 termination.
2483 * tlen is the number of bytes w have to reserve for
2484 * the path element name.
2486 tlen = nfsm_rndup(len);
2488 tlen += 4; /* To ensure null termination */
2491 * If the entry would cross a DIRBLKSIZ boundary,
2492 * extend the previous nfs_dirent to cover the
2495 left = DIRBLKSIZ - blksiz;
2496 if ((tlen + sizeof(struct nfs_dirent)) > left) {
2497 dp->nfs_reclen += left;
2498 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
2499 uiop->uio_iov->iov_len -= left;
2500 uiop->uio_offset += left;
2501 uiop->uio_resid -= left;
2504 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid)
2507 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base;
2508 dp->nfs_ino = fileno;
2509 dp->nfs_namlen = len;
2510 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent);
2511 dp->nfs_type = DT_UNKNOWN;
2512 blksiz += dp->nfs_reclen;
2513 if (blksiz == DIRBLKSIZ)
2515 uiop->uio_offset += sizeof(struct nfs_dirent);
2516 uiop->uio_resid -= sizeof(struct nfs_dirent);
2517 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent);
2518 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent);
2519 ERROROUT(nfsm_mtouio(&info, uiop, len));
2522 * The uiop has advanced by nfs_dirent + len
2523 * but really needs to advance by
2526 cp = uiop->uio_iov->iov_base;
2528 *cp = '\0'; /* null terminate */
2529 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen;
2530 uiop->uio_iov->iov_len -= tlen;
2531 uiop->uio_offset += tlen;
2532 uiop->uio_resid -= tlen;
2535 * NFS strings must be rounded up (nfsm_myouio
2536 * handled that in the bigenough case).
2538 ERROROUT(nfsm_adv(&info, nfsm_rndup(len)));
2541 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
2543 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED));
2547 * If we were able to accomodate the last entry,
2548 * get the cookie for the next one. Otherwise
2549 * hold-over the cookie for the one we were not
2550 * able to accomodate.
2553 cookie.nfsuquad[0] = *tl++;
2555 cookie.nfsuquad[1] = *tl++;
2556 } else if (info.v3) {
2561 more_dirs = fxdr_unsigned(int, *tl);
2564 * If at end of rpc data, get the eof boolean
2567 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
2568 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2574 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2575 * by increasing d_reclen for the last record.
2578 left = DIRBLKSIZ - blksiz;
2579 dp->nfs_reclen += left;
2580 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
2581 uiop->uio_iov->iov_len -= left;
2582 uiop->uio_offset += left;
2583 uiop->uio_resid -= left;
2588 * We hit the end of the directory, update direofoffset.
2590 dnp->n_direofoffset = uiop->uio_offset;
2593 * There is more to go, insert the link cookie so the
2594 * next block can be read.
2596 if (uiop->uio_resid > 0)
2597 kprintf("EEK! readdirrpc resid > 0\n");
2598 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2606 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2609 nfs_readdirplusrpc_uio(struct vnode *vp, struct uio *uiop)
2612 struct nfs_dirent *dp;
2614 struct vnode *newvp;
2616 caddr_t dpossav1, dpossav2;
2618 struct mbuf *mdsav1, *mdsav2;
2620 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2621 struct nfsnode *dnp = VTONFS(vp), *np;
2624 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2625 int attrflag, fhsize;
2626 struct nchandle nch;
2627 struct nchandle dnch;
2628 struct nlcomponent nlc;
2629 struct nfsm_info info;
2638 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2639 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2640 panic("nfs readdirplusrpc bad uio");
2643 * Obtain the namecache record for the directory so we have something
2644 * to use as a basis for creating the entries. This function will
2645 * return a held (but not locked) ncp. The ncp may be disconnected
2646 * from the tree and cannot be used for upward traversals, and the
2647 * ncp may be unnamed. Note that other unrelated operations may
2648 * cause the ncp to be named at any time.
2650 * We have to lock the ncp to prevent a lock order reversal when
2651 * rdirplus does nlookups of the children, because the vnode is
2652 * locked and has to stay that way.
2654 cache_fromdvp(vp, NULL, 0, &dnch);
2655 bzero(&nlc, sizeof(nlc));
2659 * If there is no cookie, assume directory was stale.
2661 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2667 return (NFSERR_BAD_COOKIE);
2671 * Loop around doing readdir rpc's of size nm_readdirsize
2672 * truncated to a multiple of DIRBLKSIZ.
2673 * The stopping criteria is EOF or buffer full.
2675 while (more_dirs && bigenough) {
2676 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
2677 nfsm_reqhead(&info, vp, NFSPROC_READDIRPLUS,
2678 NFSX_FH(info.v3) + 6 * NFSX_UNSIGNED);
2679 ERROROUT(nfsm_fhtom(&info, vp));
2680 tl = nfsm_build(&info, 6 * NFSX_UNSIGNED);
2681 *tl++ = cookie.nfsuquad[0];
2682 *tl++ = cookie.nfsuquad[1];
2683 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2684 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2685 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2686 *tl = txdr_unsigned(nmp->nm_rsize);
2687 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READDIRPLUS,
2689 nfs_vpcred(vp, ND_READ), &error));
2690 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag,
2691 NFS_LATTR_NOSHRINK));
2692 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
2693 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2694 dnp->n_cookieverf.nfsuquad[1] = *tl++;
2695 more_dirs = fxdr_unsigned(int, *tl);
2697 /* loop thru the dir entries, doctoring them to 4bsd form */
2698 while (more_dirs && bigenough) {
2699 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
2700 fileno = fxdr_hyper(tl);
2701 len = fxdr_unsigned(int, *(tl + 2));
2702 if (len <= 0 || len > NFS_MAXNAMLEN) {
2708 tlen = nfsm_rndup(len);
2710 tlen += 4; /* To ensure null termination*/
2711 left = DIRBLKSIZ - blksiz;
2712 if ((tlen + sizeof(struct nfs_dirent)) > left) {
2713 dp->nfs_reclen += left;
2714 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
2715 uiop->uio_iov->iov_len -= left;
2716 uiop->uio_offset += left;
2717 uiop->uio_resid -= left;
2720 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid)
2723 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base;
2724 dp->nfs_ino = fileno;
2725 dp->nfs_namlen = len;
2726 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent);
2727 dp->nfs_type = DT_UNKNOWN;
2728 blksiz += dp->nfs_reclen;
2729 if (blksiz == DIRBLKSIZ)
2731 uiop->uio_offset += sizeof(struct nfs_dirent);
2732 uiop->uio_resid -= sizeof(struct nfs_dirent);
2733 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent);
2734 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent);
2735 nlc.nlc_nameptr = uiop->uio_iov->iov_base;
2736 nlc.nlc_namelen = len;
2737 ERROROUT(nfsm_mtouio(&info, uiop, len));
2738 cp = uiop->uio_iov->iov_base;
2741 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen;
2742 uiop->uio_iov->iov_len -= tlen;
2743 uiop->uio_offset += tlen;
2744 uiop->uio_resid -= tlen;
2746 ERROROUT(nfsm_adv(&info, nfsm_rndup(len)));
2748 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
2750 cookie.nfsuquad[0] = *tl++;
2751 cookie.nfsuquad[1] = *tl++;
2757 * Since the attributes are before the file handle
2758 * (sigh), we must skip over the attributes and then
2759 * come back and get them.
2761 attrflag = fxdr_unsigned(int, *tl);
2763 dpossav1 = info.dpos;
2765 ERROROUT(nfsm_adv(&info, NFSX_V3FATTR));
2766 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
2767 doit = fxdr_unsigned(int, *tl);
2769 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp));
2771 if (doit && bigenough && !nlcdegenerate(&nlc) &&
2772 !NFS_CMPFH(dnp, fhp, fhsize)
2776 kprintf("NFS/READDIRPLUS, ENTER %*.*s\n",
2777 nlc.nlc_namelen, nlc.nlc_namelen,
2781 * This is a bit hokey but there isn't
2782 * much we can do about it. We can't
2783 * hold the directory vp locked while
2784 * doing lookups and gets.
2786 nch = cache_nlookup_nonblock(&dnch, &nlc);
2787 if (nch.ncp == NULL)
2789 cache_setunresolved(&nch);
2790 error = nfs_nget_nonblock(vp->v_mount, fhp,
2798 dpossav2 = info.dpos;
2799 info.dpos = dpossav1;
2802 ERROROUT(nfsm_loadattr(&info, newvp, NULL));
2803 info.dpos = dpossav2;
2806 IFTODT(VTTOIF(np->n_vattr.va_type));
2807 nfs_cache_setvp(&nch, newvp,
2808 nfspos_cache_timeout);
2816 kprintf("Warning: NFS/rddirplus, "
2817 "UNABLE TO ENTER %*.*s\n",
2818 nlc.nlc_namelen, nlc.nlc_namelen,
2824 /* Just skip over the file handle */
2825 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
2826 i = fxdr_unsigned(int, *tl);
2827 ERROROUT(nfsm_adv(&info, nfsm_rndup(i)));
2829 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
2830 more_dirs = fxdr_unsigned(int, *tl);
2833 * If at end of rpc data, get the eof boolean
2836 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
2837 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2843 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2844 * by increasing d_reclen for the last record.
2847 left = DIRBLKSIZ - blksiz;
2848 dp->nfs_reclen += left;
2849 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
2850 uiop->uio_iov->iov_len -= left;
2851 uiop->uio_offset += left;
2852 uiop->uio_resid -= left;
2856 * We are now either at the end of the directory or have filled the
2860 dnp->n_direofoffset = uiop->uio_offset;
2862 if (uiop->uio_resid > 0)
2863 kprintf("EEK! readdirplusrpc resid > 0\n");
2864 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2868 if (newvp != NULLVP) {
2881 * Silly rename. To make the NFS filesystem that is stateless look a little
2882 * more like the "ufs" a remove of an active vnode is translated to a rename
2883 * to a funny looking filename that is removed by nfs_inactive on the
2884 * nfsnode. There is the potential for another process on a different client
2885 * to create the same funny name between the nfs_lookitup() fails and the
2886 * nfs_rename() completes, but...
2889 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2891 struct sillyrename *sp;
2896 * We previously purged dvp instead of vp. I don't know why, it
2897 * completely destroys performance. We can't do it anyway with the
2898 * new VFS API since we would be breaking the namecache topology.
2900 cache_purge(vp); /* XXX */
2903 if (vp->v_type == VDIR)
2904 panic("nfs: sillyrename dir");
2906 sp = kmalloc(sizeof(struct sillyrename), M_NFSREQ, M_WAITOK);
2907 sp->s_cred = crdup(cnp->cn_cred);
2911 /* Fudge together a funny name */
2912 sp->s_namlen = ksprintf(sp->s_name, ".nfsA%08x4.4",
2913 (int)(intptr_t)cnp->cn_td);
2915 /* Try lookitups until we get one that isn't there */
2916 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2917 cnp->cn_td, NULL) == 0) {
2919 if (sp->s_name[4] > 'z') {
2924 error = nfs_renameit(dvp, cnp, sp);
2927 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2929 np->n_sillyrename = sp;
2934 kfree((caddr_t)sp, M_NFSREQ);
2939 * Look up a file name and optionally either update the file handle or
2940 * allocate an nfsnode, depending on the value of npp.
2941 * npp == NULL --> just do the lookup
2942 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2944 * *npp != NULL --> update the file handle in the vnode
2947 nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred,
2948 struct thread *td, struct nfsnode **npp)
2950 struct vnode *newvp = NULL;
2951 struct nfsnode *np, *dnp = VTONFS(dvp);
2952 int error = 0, fhlen, attrflag;
2954 struct nfsm_info info;
2957 info.v3 = NFS_ISV3(dvp);
2959 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
2960 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP,
2961 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2962 ERROROUT(nfsm_fhtom(&info, dvp));
2963 ERROROUT(nfsm_strtom(&info, name, len, NFS_MAXNAMLEN));
2964 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, td, cred, &error));
2965 if (npp && !error) {
2966 NEGATIVEOUT(fhlen = nfsm_getfh(&info, &nfhp));
2969 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2970 kfree((caddr_t)np->n_fhp, M_NFSBIGFH);
2971 np->n_fhp = &np->n_fh;
2972 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2973 np->n_fhp =(nfsfh_t *)kmalloc(fhlen,M_NFSBIGFH,M_WAITOK);
2974 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2975 np->n_fhsize = fhlen;
2977 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
2981 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np, NULL);
2990 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag,
2991 NFS_LATTR_NOSHRINK));
2992 if (!attrflag && *npp == NULL) {
3002 ERROROUT(nfsm_loadattr(&info, newvp, NULL));
3008 if (npp && *npp == NULL) {
3023 * Nfs Version 3 commit rpc
3025 * We call it 'uio' to distinguish it from 'bio' but there is no real uio
3029 nfs_commitrpc_uio(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td)
3031 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
3032 int error = 0, wccflag = NFSV3_WCCRATTR;
3033 struct nfsm_info info;
3039 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
3041 nfsstats.rpccnt[NFSPROC_COMMIT]++;
3042 nfsm_reqhead(&info, vp, NFSPROC_COMMIT, NFSX_FH(1));
3043 ERROROUT(nfsm_fhtom(&info, vp));
3044 tl = nfsm_build(&info, 3 * NFSX_UNSIGNED);
3045 txdr_hyper(offset, tl);
3047 *tl = txdr_unsigned(cnt);
3048 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_COMMIT, td,
3049 nfs_vpcred(vp, ND_WRITE), &error));
3050 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag));
3052 NULLOUT(tl = nfsm_dissect(&info, NFSX_V3WRITEVERF));
3053 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
3054 NFSX_V3WRITEVERF)) {
3055 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
3057 error = NFSERR_STALEWRITEVERF;
3068 * - make nfs_bmap() essentially a no-op that does no translation
3069 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
3070 * (Maybe I could use the process's page mapping, but I was concerned that
3071 * Kernel Write might not be enabled and also figured copyout() would do
3072 * a lot more work than bcopy() and also it currently happens in the
3073 * context of the swapper process (2).
3075 * nfs_bmap(struct vnode *a_vp, off_t a_loffset,
3076 * off_t *a_doffsetp, int *a_runp, int *a_runb)
3079 nfs_bmap(struct vop_bmap_args *ap)
3081 /* no token lock required */
3082 if (ap->a_doffsetp != NULL)
3083 *ap->a_doffsetp = ap->a_loffset;
3084 if (ap->a_runp != NULL)
3086 if (ap->a_runb != NULL)
3095 nfs_strategy(struct vop_strategy_args *ap)
3097 struct bio *bio = ap->a_bio;
3099 struct buf *bp __debugvar = bio->bio_buf;
3100 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount);
3104 KASSERT(bp->b_cmd != BUF_CMD_DONE,
3105 ("nfs_strategy: buffer %p unexpectedly marked done", bp));
3106 KASSERT(BUF_REFCNT(bp) > 0,
3107 ("nfs_strategy: buffer %p not locked", bp));
3109 if (bio->bio_flags & BIO_SYNC)
3110 td = curthread; /* XXX */
3114 lwkt_gettoken(&nmp->nm_token);
3117 * We probably don't need to push an nbio any more since no
3118 * block conversion is required due to the use of 64 bit byte
3119 * offsets, but do it anyway.
3121 * NOTE: When NFS callers itself via this strategy routines and
3122 * sets up a synchronous I/O, it expects the I/O to run
3123 * synchronously (its bio_done routine just assumes it),
3124 * so for now we have to honor the bit.
3126 nbio = push_bio(bio);
3127 nbio->bio_offset = bio->bio_offset;
3128 nbio->bio_flags = bio->bio_flags & BIO_SYNC;
3131 * If the op is asynchronous and an i/o daemon is waiting
3132 * queue the request, wake it up and wait for completion
3133 * otherwise just do it ourselves.
3135 if (bio->bio_flags & BIO_SYNC) {
3136 error = nfs_doio(ap->a_vp, nbio, td);
3138 nfs_asyncio(ap->a_vp, nbio);
3141 lwkt_reltoken(&nmp->nm_token);
3149 * NB Currently unsupported.
3151 * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred)
3155 nfs_mmap(struct vop_mmap_args *ap)
3157 /* no token lock required */
3162 * fsync vnode op. Just call nfs_flush() with commit == 1.
3164 * nfs_fsync(struct vnode *a_vp, int a_waitfor)
3168 nfs_fsync(struct vop_fsync_args *ap)
3170 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount);
3173 lwkt_gettoken(&nmp->nm_token);
3174 error = nfs_flush(ap->a_vp, ap->a_waitfor, curthread, 1);
3175 lwkt_reltoken(&nmp->nm_token);
3181 * Flush all the blocks associated with a vnode. Dirty NFS buffers may be
3182 * in one of two states: If B_NEEDCOMMIT is clear then the buffer contains
3183 * new NFS data which needs to be written to the server. If B_NEEDCOMMIT is
3184 * set the buffer contains data that has already been written to the server
3185 * and which now needs a commit RPC.
3187 * If commit is 0 we only take one pass and only flush buffers containing new
3190 * If commit is 1 we take two passes, issuing a commit RPC in the second
3193 * If waitfor is MNT_WAIT and commit is 1, we loop as many times as required
3194 * to completely flush all pending data.
3196 * Note that the RB_SCAN code properly handles the case where the
3197 * callback might block and directly or indirectly (another thread) cause
3198 * the RB tree to change.
3201 #ifndef NFS_COMMITBVECSIZ
3202 #define NFS_COMMITBVECSIZ 16
3205 struct nfs_flush_info {
3206 enum { NFI_FLUSHNEW, NFI_COMMIT } mode;
3213 struct buf *bvary[NFS_COMMITBVECSIZ];
3219 static int nfs_flush_bp(struct buf *bp, void *data);
3220 static int nfs_flush_docommit(struct nfs_flush_info *info, int error);
3223 nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit)
3225 struct nfsnode *np = VTONFS(vp);
3226 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
3227 struct nfs_flush_info info;
3230 bzero(&info, sizeof(info));
3233 info.waitfor = waitfor;
3234 info.slpflag = (nmp->nm_flag & NFSMNT_INT) ? PCATCH : 0;
3236 lwkt_gettoken(&vp->v_token);
3242 info.mode = NFI_FLUSHNEW;
3243 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
3244 nfs_flush_bp, &info);
3247 * Take a second pass if committing and no error occured.
3248 * Clean up any left over collection (whether an error
3251 if (commit && error == 0) {
3252 info.mode = NFI_COMMIT;
3253 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
3254 nfs_flush_bp, &info);
3256 error = nfs_flush_docommit(&info, error);
3260 * Wait for pending I/O to complete before checking whether
3261 * any further dirty buffers exist.
3263 while (waitfor == MNT_WAIT &&
3264 bio_track_active(&vp->v_track_write)) {
3265 error = bio_track_wait(&vp->v_track_write,
3266 info.slpflag, info.slptimeo);
3269 * We have to be able to break out if this
3270 * is an 'intr' mount.
3272 if (nfs_sigintr(nmp, NULL, td)) {
3278 * Since we do not process pending signals,
3279 * once we get a PCATCH our tsleep() will no
3280 * longer sleep, switch to a fixed timeout
3283 if (info.slpflag == PCATCH) {
3285 info.slptimeo = 2 * hz;
3292 * Loop if we are flushing synchronous as well as committing,
3293 * and dirty buffers are still present. Otherwise we might livelock.
3295 } while (waitfor == MNT_WAIT && commit &&
3296 error == 0 && !RB_EMPTY(&vp->v_rbdirty_tree));
3299 * The callbacks have to return a negative error to terminate the
3306 * Deal with any error collection
3308 if (np->n_flag & NWRITEERR) {
3309 error = np->n_error;
3310 np->n_flag &= ~NWRITEERR;
3312 lwkt_reltoken(&vp->v_token);
3318 nfs_flush_bp(struct buf *bp, void *data)
3320 struct nfs_flush_info *info = data;
3326 switch(info->mode) {
3328 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT);
3329 if (error && info->loops && info->waitfor == MNT_WAIT) {
3330 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT);
3332 lkflags = LK_EXCLUSIVE | LK_SLEEPFAIL;
3333 if (info->slpflag & PCATCH)
3334 lkflags |= LK_PCATCH;
3335 error = BUF_TIMELOCK(bp, lkflags, "nfsfsync",
3341 * Ignore locking errors
3349 * The buffer may have changed out from under us, even if
3350 * we did not block (MPSAFE). Check again now that it is
3353 if (bp->b_vp == info->vp &&
3354 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) == B_DELWRI) {
3363 * Only process buffers in need of a commit which we can
3364 * immediately lock. This may prevent a buffer from being
3365 * committed, but the normal flush loop will block on the
3366 * same buffer so we shouldn't get into an endless loop.
3368 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
3369 (B_DELWRI | B_NEEDCOMMIT)) {
3372 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
3376 * We must recheck after successfully locking the buffer.
3378 if (bp->b_vp != info->vp ||
3379 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
3380 (B_DELWRI | B_NEEDCOMMIT)) {
3386 * NOTE: storing the bp in the bvary[] basically sets
3387 * it up for a commit operation.
3389 * We must call vfs_busy_pages() now so the commit operation
3390 * is interlocked with user modifications to memory mapped
3391 * pages. The b_dirtyoff/b_dirtyend range is not correct
3392 * until after the pages have been busied.
3394 * Note: to avoid loopback deadlocks, we do not
3395 * assign b_runningbufspace.
3398 bp->b_cmd = BUF_CMD_WRITE;
3399 vfs_busy_pages(bp->b_vp, bp);
3400 info->bvary[info->bvsize] = bp;
3401 toff = bp->b_bio2.bio_offset + bp->b_dirtyoff;
3402 if (info->bvsize == 0 || toff < info->beg_off)
3403 info->beg_off = toff;
3404 toff += (off_t)(bp->b_dirtyend - bp->b_dirtyoff);
3405 if (info->bvsize == 0 || toff > info->end_off)
3406 info->end_off = toff;
3408 if (info->bvsize == NFS_COMMITBVECSIZ) {
3409 error = nfs_flush_docommit(info, 0);
3410 KKASSERT(info->bvsize == 0);
3418 nfs_flush_docommit(struct nfs_flush_info *info, int error)
3428 if (info->bvsize > 0) {
3430 * Commit data on the server, as required. Note that
3431 * nfs_commit will use the vnode's cred for the commit.
3432 * The NFSv3 commit RPC is limited to a 32 bit byte count.
3434 bytes = info->end_off - info->beg_off;
3435 if (bytes > 0x40000000)
3440 retv = nfs_commitrpc_uio(vp, info->beg_off,
3441 (int)bytes, info->td);
3442 if (retv == NFSERR_STALEWRITEVERF)
3443 nfs_clearcommit(vp->v_mount);
3447 * Now, either mark the blocks I/O done or mark the
3448 * blocks dirty, depending on whether the commit
3451 for (i = 0; i < info->bvsize; ++i) {
3452 bp = info->bvary[i];
3453 if (retv || (bp->b_flags & B_NEEDCOMMIT) == 0) {
3455 * Either an error or the original
3456 * vfs_busy_pages() cleared B_NEEDCOMMIT
3457 * due to finding new dirty VM pages in
3460 * Leave B_DELWRI intact.
3462 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
3463 vfs_unbusy_pages(bp);
3464 bp->b_cmd = BUF_CMD_DONE;
3468 * Success, remove B_DELWRI ( bundirty() ).
3470 * b_dirtyoff/b_dirtyend seem to be NFS
3471 * specific. We should probably move that
3472 * into bundirty(). XXX
3474 * We are faking an I/O write, we have to
3475 * start the transaction in order to
3476 * immediately biodone() it.
3479 bp->b_flags &= ~B_ERROR;
3480 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
3481 bp->b_dirtyoff = bp->b_dirtyend = 0;
3482 biodone(&bp->b_bio1);
3491 * NFS advisory byte-level locks.
3492 * Currently unsupported.
3494 * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl,
3498 nfs_advlock(struct vop_advlock_args *ap)
3500 struct nfsnode *np = VTONFS(ap->a_vp);
3502 /* no token lock currently required */
3504 * The following kludge is to allow diskless support to work
3505 * until a real NFS lockd is implemented. Basically, just pretend
3506 * that this is a local lock.
3508 return (lf_advlock(ap, &(np->n_lockf), np->n_size));
3512 * Print out the contents of an nfsnode.
3514 * nfs_print(struct vnode *a_vp)
3517 nfs_print(struct vop_print_args *ap)
3519 struct vnode *vp = ap->a_vp;
3520 struct nfsnode *np = VTONFS(vp);
3522 kprintf("tag VT_NFS, fileid %lld fsid 0x%x",
3523 (long long)np->n_vattr.va_fileid, np->n_vattr.va_fsid);
3524 if (vp->v_type == VFIFO)
3531 * nfs special file access vnode op.
3533 * nfs_laccess(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
3536 nfs_laccess(struct vop_access_args *ap)
3538 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount);
3542 lwkt_gettoken(&nmp->nm_token);
3543 error = VOP_GETATTR(ap->a_vp, &vattr);
3545 error = vop_helper_access(ap, vattr.va_uid, vattr.va_gid,
3548 lwkt_reltoken(&nmp->nm_token);
3554 * Read wrapper for fifos.
3556 * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3557 * struct ucred *a_cred)
3560 nfsfifo_read(struct vop_read_args *ap)
3562 struct nfsnode *np = VTONFS(ap->a_vp);
3564 /* no token access required */
3569 getnanotime(&np->n_atim);
3570 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
3574 * Write wrapper for fifos.
3576 * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3577 * struct ucred *a_cred)
3580 nfsfifo_write(struct vop_write_args *ap)
3582 struct nfsnode *np = VTONFS(ap->a_vp);
3584 /* no token access required */
3589 getnanotime(&np->n_mtim);
3590 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
3594 * Close wrapper for fifos.
3596 * Update the times on the nfsnode then do fifo close.
3598 * nfsfifo_close(struct vnode *a_vp, int a_fflag)
3601 nfsfifo_close(struct vop_close_args *ap)
3603 struct vnode *vp = ap->a_vp;
3604 struct nfsnode *np = VTONFS(vp);
3608 /* no token access required */
3610 if (np->n_flag & (NACC | NUPD)) {
3612 if (np->n_flag & NACC)
3614 if (np->n_flag & NUPD)
3617 if (vp->v_sysref.refcnt == 1 &&
3618 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3620 if (np->n_flag & NACC)
3621 vattr.va_atime = np->n_atim;
3622 if (np->n_flag & NUPD)
3623 vattr.va_mtime = np->n_mtim;
3624 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE));
3627 return (VOCALL(&fifo_vnode_vops, &ap->a_head));