2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95
37 * $FreeBSD: src/sys/nfs/nfs_vnops.c,v 1.150.2.5 2001/12/20 19:56:28 dillon Exp $
38 * $DragonFly: src/sys/vfs/nfs/nfs_vnops.c,v 1.80 2008/10/18 01:13:54 dillon Exp $
43 * vnode op calls for Sun NFS version 2 and 3
48 #include <sys/param.h>
49 #include <sys/kernel.h>
50 #include <sys/systm.h>
51 #include <sys/resourcevar.h>
53 #include <sys/mount.h>
55 #include <sys/malloc.h>
57 #include <sys/namei.h>
58 #include <sys/nlookup.h>
59 #include <sys/socket.h>
60 #include <sys/vnode.h>
61 #include <sys/dirent.h>
62 #include <sys/fcntl.h>
63 #include <sys/lockf.h>
65 #include <sys/sysctl.h>
69 #include <vm/vm_extern.h>
70 #include <vm/vm_zone.h>
74 #include <vfs/fifofs/fifo.h>
75 #include <vfs/ufs/dir.h>
85 #include "nfsm_subs.h"
88 #include <netinet/in.h>
89 #include <netinet/in_var.h>
91 #include <sys/thread2.h>
97 static int nfsspec_read (struct vop_read_args
*);
98 static int nfsspec_write (struct vop_write_args
*);
99 static int nfsfifo_read (struct vop_read_args
*);
100 static int nfsfifo_write (struct vop_write_args
*);
101 static int nfsspec_close (struct vop_close_args
*);
102 static int nfsfifo_close (struct vop_close_args
*);
103 #define nfs_poll vop_nopoll
104 static int nfs_setattrrpc (struct vnode
*,struct vattr
*,struct ucred
*,struct thread
*);
105 static int nfs_lookup (struct vop_old_lookup_args
*);
106 static int nfs_create (struct vop_old_create_args
*);
107 static int nfs_mknod (struct vop_old_mknod_args
*);
108 static int nfs_open (struct vop_open_args
*);
109 static int nfs_close (struct vop_close_args
*);
110 static int nfs_access (struct vop_access_args
*);
111 static int nfs_getattr (struct vop_getattr_args
*);
112 static int nfs_setattr (struct vop_setattr_args
*);
113 static int nfs_read (struct vop_read_args
*);
114 static int nfs_mmap (struct vop_mmap_args
*);
115 static int nfs_fsync (struct vop_fsync_args
*);
116 static int nfs_remove (struct vop_old_remove_args
*);
117 static int nfs_link (struct vop_old_link_args
*);
118 static int nfs_rename (struct vop_old_rename_args
*);
119 static int nfs_mkdir (struct vop_old_mkdir_args
*);
120 static int nfs_rmdir (struct vop_old_rmdir_args
*);
121 static int nfs_symlink (struct vop_old_symlink_args
*);
122 static int nfs_readdir (struct vop_readdir_args
*);
123 static int nfs_bmap (struct vop_bmap_args
*);
124 static int nfs_strategy (struct vop_strategy_args
*);
125 static int nfs_lookitup (struct vnode
*, const char *, int,
126 struct ucred
*, struct thread
*, struct nfsnode
**);
127 static int nfs_sillyrename (struct vnode
*,struct vnode
*,struct componentname
*);
128 static int nfsspec_access (struct vop_access_args
*);
129 static int nfs_readlink (struct vop_readlink_args
*);
130 static int nfs_print (struct vop_print_args
*);
131 static int nfs_advlock (struct vop_advlock_args
*);
133 static int nfs_nresolve (struct vop_nresolve_args
*);
135 * Global vfs data structures for nfs
137 struct vop_ops nfsv2_vnode_vops
= {
138 .vop_default
= vop_defaultop
,
139 .vop_access
= nfs_access
,
140 .vop_advlock
= nfs_advlock
,
141 .vop_bmap
= nfs_bmap
,
142 .vop_close
= nfs_close
,
143 .vop_old_create
= nfs_create
,
144 .vop_fsync
= nfs_fsync
,
145 .vop_getattr
= nfs_getattr
,
146 .vop_getpages
= nfs_getpages
,
147 .vop_putpages
= nfs_putpages
,
148 .vop_inactive
= nfs_inactive
,
149 .vop_old_link
= nfs_link
,
150 .vop_old_lookup
= nfs_lookup
,
151 .vop_old_mkdir
= nfs_mkdir
,
152 .vop_old_mknod
= nfs_mknod
,
153 .vop_mmap
= nfs_mmap
,
154 .vop_open
= nfs_open
,
155 .vop_poll
= nfs_poll
,
156 .vop_print
= nfs_print
,
157 .vop_read
= nfs_read
,
158 .vop_readdir
= nfs_readdir
,
159 .vop_readlink
= nfs_readlink
,
160 .vop_reclaim
= nfs_reclaim
,
161 .vop_old_remove
= nfs_remove
,
162 .vop_old_rename
= nfs_rename
,
163 .vop_old_rmdir
= nfs_rmdir
,
164 .vop_setattr
= nfs_setattr
,
165 .vop_strategy
= nfs_strategy
,
166 .vop_old_symlink
= nfs_symlink
,
167 .vop_write
= nfs_write
,
168 .vop_nresolve
= nfs_nresolve
172 * Special device vnode ops
174 struct vop_ops nfsv2_spec_vops
= {
175 .vop_default
= spec_vnoperate
,
176 .vop_access
= nfsspec_access
,
177 .vop_close
= nfsspec_close
,
178 .vop_fsync
= nfs_fsync
,
179 .vop_getattr
= nfs_getattr
,
180 .vop_inactive
= nfs_inactive
,
181 .vop_print
= nfs_print
,
182 .vop_read
= nfsspec_read
,
183 .vop_reclaim
= nfs_reclaim
,
184 .vop_setattr
= nfs_setattr
,
185 .vop_write
= nfsspec_write
188 struct vop_ops nfsv2_fifo_vops
= {
189 .vop_default
= fifo_vnoperate
,
190 .vop_access
= nfsspec_access
,
191 .vop_close
= nfsfifo_close
,
192 .vop_fsync
= nfs_fsync
,
193 .vop_getattr
= nfs_getattr
,
194 .vop_inactive
= nfs_inactive
,
195 .vop_print
= nfs_print
,
196 .vop_read
= nfsfifo_read
,
197 .vop_reclaim
= nfs_reclaim
,
198 .vop_setattr
= nfs_setattr
,
199 .vop_write
= nfsfifo_write
202 static int nfs_mknodrpc (struct vnode
*dvp
, struct vnode
**vpp
,
203 struct componentname
*cnp
,
205 static int nfs_removerpc (struct vnode
*dvp
, const char *name
,
207 struct ucred
*cred
, struct thread
*td
);
208 static int nfs_renamerpc (struct vnode
*fdvp
, const char *fnameptr
,
209 int fnamelen
, struct vnode
*tdvp
,
210 const char *tnameptr
, int tnamelen
,
211 struct ucred
*cred
, struct thread
*td
);
212 static int nfs_renameit (struct vnode
*sdvp
,
213 struct componentname
*scnp
,
214 struct sillyrename
*sp
);
219 extern u_int32_t nfs_true
, nfs_false
;
220 extern u_int32_t nfs_xdrneg1
;
221 extern struct nfsstats nfsstats
;
222 extern nfstype nfsv3_type
[9];
223 struct thread
*nfs_iodwant
[NFS_MAXASYNCDAEMON
];
224 struct nfsmount
*nfs_iodmount
[NFS_MAXASYNCDAEMON
];
225 int nfs_numasync
= 0;
227 SYSCTL_DECL(_vfs_nfs
);
229 static int nfs_flush_on_rename
= 1;
230 SYSCTL_INT(_vfs_nfs
, OID_AUTO
, flush_on_rename
, CTLFLAG_RW
,
231 &nfs_flush_on_rename
, 0, "flush fvp prior to rename");
232 static int nfs_flush_on_hlink
= 0;
233 SYSCTL_INT(_vfs_nfs
, OID_AUTO
, flush_on_hlink
, CTLFLAG_RW
,
234 &nfs_flush_on_hlink
, 0, "flush fvp prior to hard link");
236 static int nfsaccess_cache_timeout
= NFS_DEFATTRTIMO
;
237 SYSCTL_INT(_vfs_nfs
, OID_AUTO
, access_cache_timeout
, CTLFLAG_RW
,
238 &nfsaccess_cache_timeout
, 0, "NFS ACCESS cache timeout");
240 static int nfsneg_cache_timeout
= NFS_MINATTRTIMO
;
241 SYSCTL_INT(_vfs_nfs
, OID_AUTO
, neg_cache_timeout
, CTLFLAG_RW
,
242 &nfsneg_cache_timeout
, 0, "NFS NEGATIVE NAMECACHE timeout");
244 static int nfspos_cache_timeout
= NFS_MINATTRTIMO
;
245 SYSCTL_INT(_vfs_nfs
, OID_AUTO
, pos_cache_timeout
, CTLFLAG_RW
,
246 &nfspos_cache_timeout
, 0, "NFS POSITIVE NAMECACHE timeout");
248 static int nfsv3_commit_on_close
= 0;
249 SYSCTL_INT(_vfs_nfs
, OID_AUTO
, nfsv3_commit_on_close
, CTLFLAG_RW
,
250 &nfsv3_commit_on_close
, 0, "write+commit on close, else only write");
252 SYSCTL_INT(_vfs_nfs
, OID_AUTO
, access_cache_hits
, CTLFLAG_RD
,
253 &nfsstats
.accesscache_hits
, 0, "NFS ACCESS cache hit count");
255 SYSCTL_INT(_vfs_nfs
, OID_AUTO
, access_cache_misses
, CTLFLAG_RD
,
256 &nfsstats
.accesscache_misses
, 0, "NFS ACCESS cache miss count");
259 #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \
260 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \
261 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP)
263 nfs3_access_otw(struct vnode
*vp
, int wmode
,
264 struct thread
*td
, struct ucred
*cred
)
268 int error
= 0, attrflag
;
270 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
271 caddr_t bpos
, dpos
, cp2
;
275 struct nfsnode
*np
= VTONFS(vp
);
277 nfsstats
.rpccnt
[NFSPROC_ACCESS
]++;
278 nfsm_reqhead(vp
, NFSPROC_ACCESS
, NFSX_FH(v3
) + NFSX_UNSIGNED
);
280 nfsm_build(tl
, u_int32_t
*, NFSX_UNSIGNED
);
281 *tl
= txdr_unsigned(wmode
);
282 nfsm_request(vp
, NFSPROC_ACCESS
, td
, cred
);
283 nfsm_postop_attr(vp
, attrflag
, NFS_LATTR_NOSHRINK
);
285 nfsm_dissect(tl
, u_int32_t
*, NFSX_UNSIGNED
);
286 rmode
= fxdr_unsigned(u_int32_t
, *tl
);
288 np
->n_modeuid
= cred
->cr_uid
;
289 np
->n_modestamp
= mycpu
->gd_time_seconds
;
297 * nfs access vnode op.
298 * For nfs version 2, just return ok. File accesses may fail later.
299 * For nfs version 3, use the access rpc to check accessibility. If file modes
300 * are changed on the server, accesses might still fail later.
302 * nfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
305 nfs_access(struct vop_access_args
*ap
)
307 struct vnode
*vp
= ap
->a_vp
;
308 thread_t td
= curthread
;
310 u_int32_t mode
, wmode
;
311 int v3
= NFS_ISV3(vp
);
312 struct nfsnode
*np
= VTONFS(vp
);
315 * Disallow write attempts on filesystems mounted read-only;
316 * unless the file is a socket, fifo, or a block or character
317 * device resident on the filesystem.
319 if ((ap
->a_mode
& VWRITE
) && (vp
->v_mount
->mnt_flag
& MNT_RDONLY
)) {
320 switch (vp
->v_type
) {
330 * For nfs v3, check to see if we have done this recently, and if
331 * so return our cached result instead of making an ACCESS call.
332 * If not, do an access rpc, otherwise you are stuck emulating
333 * ufs_access() locally using the vattr. This may not be correct,
334 * since the server may apply other access criteria such as
335 * client uid-->server uid mapping that we do not know about.
338 if (ap
->a_mode
& VREAD
)
339 mode
= NFSV3ACCESS_READ
;
342 if (vp
->v_type
!= VDIR
) {
343 if (ap
->a_mode
& VWRITE
)
344 mode
|= (NFSV3ACCESS_MODIFY
| NFSV3ACCESS_EXTEND
);
345 if (ap
->a_mode
& VEXEC
)
346 mode
|= NFSV3ACCESS_EXECUTE
;
348 if (ap
->a_mode
& VWRITE
)
349 mode
|= (NFSV3ACCESS_MODIFY
| NFSV3ACCESS_EXTEND
|
351 if (ap
->a_mode
& VEXEC
)
352 mode
|= NFSV3ACCESS_LOOKUP
;
354 /* XXX safety belt, only make blanket request if caching */
355 if (nfsaccess_cache_timeout
> 0) {
356 wmode
= NFSV3ACCESS_READ
| NFSV3ACCESS_MODIFY
|
357 NFSV3ACCESS_EXTEND
| NFSV3ACCESS_EXECUTE
|
358 NFSV3ACCESS_DELETE
| NFSV3ACCESS_LOOKUP
;
364 * Does our cached result allow us to give a definite yes to
367 if (np
->n_modestamp
&&
368 (mycpu
->gd_time_seconds
< (np
->n_modestamp
+ nfsaccess_cache_timeout
)) &&
369 (ap
->a_cred
->cr_uid
== np
->n_modeuid
) &&
370 ((np
->n_mode
& mode
) == mode
)) {
371 nfsstats
.accesscache_hits
++;
374 * Either a no, or a don't know. Go to the wire.
376 nfsstats
.accesscache_misses
++;
377 error
= nfs3_access_otw(vp
, wmode
, td
, ap
->a_cred
);
379 if ((np
->n_mode
& mode
) != mode
) {
385 if ((error
= nfsspec_access(ap
)) != 0)
389 * Attempt to prevent a mapped root from accessing a file
390 * which it shouldn't. We try to read a byte from the file
391 * if the user is root and the file is not zero length.
392 * After calling nfsspec_access, we should have the correct
395 if (ap
->a_cred
->cr_uid
== 0 && (ap
->a_mode
& VREAD
)
396 && VTONFS(vp
)->n_size
> 0) {
403 auio
.uio_iov
= &aiov
;
407 auio
.uio_segflg
= UIO_SYSSPACE
;
408 auio
.uio_rw
= UIO_READ
;
411 if (vp
->v_type
== VREG
) {
412 error
= nfs_readrpc(vp
, &auio
);
413 } else if (vp
->v_type
== VDIR
) {
415 bp
= kmalloc(NFS_DIRBLKSIZ
, M_TEMP
, M_WAITOK
);
417 aiov
.iov_len
= auio
.uio_resid
= NFS_DIRBLKSIZ
;
418 error
= nfs_readdirrpc(vp
, &auio
);
420 } else if (vp
->v_type
== VLNK
) {
421 error
= nfs_readlinkrpc(vp
, &auio
);
428 * [re]record creds for reading and/or writing if access
429 * was granted. Assume the NFS server will grant read access
430 * for execute requests.
433 if ((ap
->a_mode
& (VREAD
|VEXEC
)) && ap
->a_cred
!= np
->n_rucred
) {
436 crfree(np
->n_rucred
);
437 np
->n_rucred
= ap
->a_cred
;
439 if ((ap
->a_mode
& VWRITE
) && ap
->a_cred
!= np
->n_wucred
) {
442 crfree(np
->n_wucred
);
443 np
->n_wucred
= ap
->a_cred
;
451 * Check to see if the type is ok
452 * and that deletion is not in progress.
453 * For paged in text files, you will need to flush the page cache
454 * if consistency is lost.
456 * nfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
461 nfs_open(struct vop_open_args
*ap
)
463 struct vnode
*vp
= ap
->a_vp
;
464 struct nfsnode
*np
= VTONFS(vp
);
468 if (vp
->v_type
!= VREG
&& vp
->v_type
!= VDIR
&& vp
->v_type
!= VLNK
) {
470 kprintf("open eacces vtyp=%d\n",vp
->v_type
);
476 * Save valid creds for reading and writing for later RPCs.
478 if ((ap
->a_mode
& FREAD
) && ap
->a_cred
!= np
->n_rucred
) {
481 crfree(np
->n_rucred
);
482 np
->n_rucred
= ap
->a_cred
;
484 if ((ap
->a_mode
& FWRITE
) && ap
->a_cred
!= np
->n_wucred
) {
487 crfree(np
->n_wucred
);
488 np
->n_wucred
= ap
->a_cred
;
492 * Clear the attribute cache only if opening with write access. It
493 * is unclear if we should do this at all here, but we certainly
494 * should not clear the cache unconditionally simply because a file
497 if (ap
->a_mode
& FWRITE
)
501 * For normal NFS, reconcile changes made locally verses
502 * changes made remotely. Note that VOP_GETATTR only goes
503 * to the wire if the cached attribute has timed out or been
506 * If local modifications have been made clear the attribute
507 * cache to force an attribute and modified time check. If
508 * GETATTR detects that the file has been changed by someone
509 * other then us it will set NRMODIFIED.
511 * If we are opening a directory and local changes have been
512 * made we have to invalidate the cache in order to ensure
513 * that we get the most up-to-date information from the
516 if (np
->n_flag
& NLMODIFIED
) {
518 if (vp
->v_type
== VDIR
) {
519 error
= nfs_vinvalbuf(vp
, V_SAVE
, 1);
525 error
= VOP_GETATTR(vp
, &vattr
);
528 if (np
->n_flag
& NRMODIFIED
) {
529 if (vp
->v_type
== VDIR
)
531 error
= nfs_vinvalbuf(vp
, V_SAVE
, 1);
534 np
->n_flag
&= ~NRMODIFIED
;
537 return (vop_stdopen(ap
));
542 * What an NFS client should do upon close after writing is a debatable issue.
543 * Most NFS clients push delayed writes to the server upon close, basically for
545 * 1 - So that any write errors may be reported back to the client process
546 * doing the close system call. By far the two most likely errors are
547 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
548 * 2 - To put a worst case upper bound on cache inconsistency between
549 * multiple clients for the file.
550 * There is also a consistency problem for Version 2 of the protocol w.r.t.
551 * not being able to tell if other clients are writing a file concurrently,
552 * since there is no way of knowing if the changed modify time in the reply
553 * is only due to the write for this client.
554 * (NFS Version 3 provides weak cache consistency data in the reply that
555 * should be sufficient to detect and handle this case.)
557 * The current code does the following:
558 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
559 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
560 * or commit them (this satisfies 1 and 2 except for the
561 * case where the server crashes after this close but
562 * before the commit RPC, which is felt to be "good
563 * enough". Changing the last argument to nfs_flush() to
564 * a 1 would force a commit operation, if it is felt a
565 * commit is necessary now.
566 * for NQNFS - do nothing now, since 2 is dealt with via leases and
567 * 1 should be dealt with via an fsync() system call for
568 * cases where write errors are important.
570 * nfs_close(struct vnode *a_vp, int a_fflag)
574 nfs_close(struct vop_close_args
*ap
)
576 struct vnode
*vp
= ap
->a_vp
;
577 struct nfsnode
*np
= VTONFS(vp
);
579 thread_t td
= curthread
;
581 if (vp
->v_type
== VREG
) {
582 if (np
->n_flag
& NLMODIFIED
) {
585 * Under NFSv3 we have dirty buffers to dispose of. We
586 * must flush them to the NFS server. We have the option
587 * of waiting all the way through the commit rpc or just
588 * waiting for the initial write. The default is to only
589 * wait through the initial write so the data is in the
590 * server's cache, which is roughly similar to the state
591 * a standard disk subsystem leaves the file in on close().
593 * We cannot clear the NLMODIFIED bit in np->n_flag due to
594 * potential races with other processes, and certainly
595 * cannot clear it if we don't commit.
597 int cm
= nfsv3_commit_on_close
? 1 : 0;
598 error
= nfs_flush(vp
, MNT_WAIT
, td
, cm
);
599 /* np->n_flag &= ~NLMODIFIED; */
601 error
= nfs_vinvalbuf(vp
, V_SAVE
, 1);
605 if (np
->n_flag
& NWRITEERR
) {
606 np
->n_flag
&= ~NWRITEERR
;
615 * nfs getattr call from vfs.
617 * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap)
620 nfs_getattr(struct vop_getattr_args
*ap
)
622 struct vnode
*vp
= ap
->a_vp
;
623 struct nfsnode
*np
= VTONFS(vp
);
629 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
630 int v3
= NFS_ISV3(vp
);
631 thread_t td
= curthread
;
634 * Update local times for special files.
636 if (np
->n_flag
& (NACC
| NUPD
))
639 * First look in the cache.
641 if (nfs_getattrcache(vp
, ap
->a_vap
) == 0)
644 if (v3
&& nfsaccess_cache_timeout
> 0) {
645 nfsstats
.accesscache_misses
++;
646 nfs3_access_otw(vp
, NFSV3ACCESS_ALL
, td
, nfs_vpcred(vp
, ND_CHECK
));
647 if (nfs_getattrcache(vp
, ap
->a_vap
) == 0)
651 nfsstats
.rpccnt
[NFSPROC_GETATTR
]++;
652 nfsm_reqhead(vp
, NFSPROC_GETATTR
, NFSX_FH(v3
));
654 nfsm_request(vp
, NFSPROC_GETATTR
, td
, nfs_vpcred(vp
, ND_CHECK
));
656 nfsm_loadattr(vp
, ap
->a_vap
);
666 * nfs_setattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred)
669 nfs_setattr(struct vop_setattr_args
*ap
)
671 struct vnode
*vp
= ap
->a_vp
;
672 struct nfsnode
*np
= VTONFS(vp
);
673 struct vattr
*vap
= ap
->a_vap
;
676 thread_t td
= curthread
;
683 * Setting of flags is not supported.
685 if (vap
->va_flags
!= VNOVAL
)
689 * Disallow write attempts if the filesystem is mounted read-only.
691 if ((vap
->va_flags
!= VNOVAL
|| vap
->va_uid
!= (uid_t
)VNOVAL
||
692 vap
->va_gid
!= (gid_t
)VNOVAL
|| vap
->va_atime
.tv_sec
!= VNOVAL
||
693 vap
->va_mtime
.tv_sec
!= VNOVAL
|| vap
->va_mode
!= (mode_t
)VNOVAL
) &&
694 (vp
->v_mount
->mnt_flag
& MNT_RDONLY
))
697 if (vap
->va_size
!= VNOVAL
) {
699 * truncation requested
701 switch (vp
->v_type
) {
708 if (vap
->va_mtime
.tv_sec
== VNOVAL
&&
709 vap
->va_atime
.tv_sec
== VNOVAL
&&
710 vap
->va_mode
== (mode_t
)VNOVAL
&&
711 vap
->va_uid
== (uid_t
)VNOVAL
&&
712 vap
->va_gid
== (gid_t
)VNOVAL
)
714 vap
->va_size
= VNOVAL
;
718 * Disallow write attempts if the filesystem is
721 if (vp
->v_mount
->mnt_flag
& MNT_RDONLY
)
725 * This is nasty. The RPCs we send to flush pending
726 * data often return attribute information which is
727 * cached via a callback to nfs_loadattrcache(), which
728 * has the effect of changing our notion of the file
729 * size. Due to flushed appends and other operations
730 * the file size can be set to virtually anything,
731 * including values that do not match either the old
732 * or intended file size.
734 * When this condition is detected we must loop to
735 * try the operation again. Hopefully no more
736 * flushing is required on the loop so it works the
737 * second time around. THIS CASE ALMOST ALWAYS
742 error
= nfs_meta_setsize(vp
, td
, vap
->va_size
);
744 if (np
->n_flag
& NLMODIFIED
) {
745 if (vap
->va_size
== 0)
746 error
= nfs_vinvalbuf(vp
, 0, 1);
748 error
= nfs_vinvalbuf(vp
, V_SAVE
, 1);
751 * note: this loop case almost always happens at
752 * least once per truncation.
754 if (error
== 0 && np
->n_size
!= vap
->va_size
)
756 np
->n_vattr
.va_size
= vap
->va_size
;
759 } else if ((np
->n_flag
& NLMODIFIED
) && vp
->v_type
== VREG
) {
761 * What to do. If we are modifying the mtime we lose
762 * mtime detection of changes made by the server or other
763 * clients. But programs like rsync/rdist/cpdup are going
764 * to call utimes a lot. We don't want to piecemeal sync.
766 * For now sync if any prior remote changes were detected,
767 * but allow us to lose track of remote changes made during
768 * the utimes operation.
770 if (np
->n_flag
& NRMODIFIED
)
771 error
= nfs_vinvalbuf(vp
, V_SAVE
, 1);
775 if (vap
->va_mtime
.tv_sec
!= VNOVAL
) {
776 np
->n_mtime
= vap
->va_mtime
.tv_sec
;
780 error
= nfs_setattrrpc(vp
, vap
, ap
->a_cred
, td
);
783 * Sanity check if a truncation was issued. This should only occur
784 * if multiple processes are racing on the same file.
786 if (error
== 0 && vap
->va_size
!= VNOVAL
&&
787 np
->n_size
!= vap
->va_size
) {
788 kprintf("NFS ftruncate: server disagrees on the file size: "
791 (long long)vap
->va_size
,
792 (long long)np
->n_size
);
795 if (error
&& vap
->va_size
!= VNOVAL
) {
796 np
->n_size
= np
->n_vattr
.va_size
= tsize
;
797 vnode_pager_setsize(vp
, np
->n_size
);
803 * Do an nfs setattr rpc.
806 nfs_setattrrpc(struct vnode
*vp
, struct vattr
*vap
,
807 struct ucred
*cred
, struct thread
*td
)
809 struct nfsv2_sattr
*sp
;
810 struct nfsnode
*np
= VTONFS(vp
);
813 caddr_t bpos
, dpos
, cp2
;
815 int error
= 0, wccflag
= NFSV3_WCCRATTR
;
816 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
817 int v3
= NFS_ISV3(vp
);
819 nfsstats
.rpccnt
[NFSPROC_SETATTR
]++;
820 nfsm_reqhead(vp
, NFSPROC_SETATTR
, NFSX_FH(v3
) + NFSX_SATTR(v3
));
823 nfsm_v3attrbuild(vap
, TRUE
);
824 nfsm_build(tl
, u_int32_t
*, NFSX_UNSIGNED
);
827 nfsm_build(sp
, struct nfsv2_sattr
*, NFSX_V2SATTR
);
828 if (vap
->va_mode
== (mode_t
)VNOVAL
)
829 sp
->sa_mode
= nfs_xdrneg1
;
831 sp
->sa_mode
= vtonfsv2_mode(vp
->v_type
, vap
->va_mode
);
832 if (vap
->va_uid
== (uid_t
)VNOVAL
)
833 sp
->sa_uid
= nfs_xdrneg1
;
835 sp
->sa_uid
= txdr_unsigned(vap
->va_uid
);
836 if (vap
->va_gid
== (gid_t
)VNOVAL
)
837 sp
->sa_gid
= nfs_xdrneg1
;
839 sp
->sa_gid
= txdr_unsigned(vap
->va_gid
);
840 sp
->sa_size
= txdr_unsigned(vap
->va_size
);
841 txdr_nfsv2time(&vap
->va_atime
, &sp
->sa_atime
);
842 txdr_nfsv2time(&vap
->va_mtime
, &sp
->sa_mtime
);
844 nfsm_request(vp
, NFSPROC_SETATTR
, td
, cred
);
847 nfsm_wcc_data(vp
, wccflag
);
849 nfsm_loadattr(vp
, NULL
);
857 nfs_cache_setvp(struct nchandle
*nch
, struct vnode
*vp
, int nctimeout
)
863 cache_setvp(nch
, vp
);
864 cache_settimeout(nch
, nctimeout
);
868 * NEW API CALL - replaces nfs_lookup(). However, we cannot remove
869 * nfs_lookup() until all remaining new api calls are implemented.
871 * Resolve a namecache entry. This function is passed a locked ncp and
872 * must call nfs_cache_setvp() on it as appropriate to resolve the entry.
875 nfs_nresolve(struct vop_nresolve_args
*ap
)
877 struct thread
*td
= curthread
;
878 struct namecache
*ncp
;
889 /******NFSM MACROS********/
890 struct mbuf
*mb
, *mrep
, *mreq
, *mb2
, *md
;
891 caddr_t bpos
, dpos
, cp
, cp2
;
898 if ((error
= vget(dvp
, LK_SHARED
)) != 0)
903 nfsstats
.lookupcache_misses
++;
904 nfsstats
.rpccnt
[NFSPROC_LOOKUP
]++;
905 ncp
= ap
->a_nch
->ncp
;
907 nfsm_reqhead(dvp
, NFSPROC_LOOKUP
,
908 NFSX_FH(v3
) + NFSX_UNSIGNED
+ nfsm_rndup(len
));
910 nfsm_strtom(ncp
->nc_name
, len
, NFS_MAXNAMLEN
);
911 nfsm_request(dvp
, NFSPROC_LOOKUP
, td
, ap
->a_cred
);
914 * Cache negatve lookups to reduce NFS traffic, but use
915 * a fast timeout. Otherwise use a timeout of 1 tick.
916 * XXX we should add a namecache flag for no-caching
917 * to uncache the negative hit as soon as possible, but
918 * we cannot simply destroy the entry because it is used
919 * as a placeholder by the caller.
922 nfs_cache_setvp(ap
->a_nch
, NULL
, nfsneg_cache_timeout
);
923 nfsm_postop_attr(dvp
, attrflag
, NFS_LATTR_NOSHRINK
);
929 * Success, get the file handle, do various checks, and load
930 * post-operation data from the reply packet. Theoretically
931 * we should never be looking up "." so, theoretically, we
932 * should never get the same file handle as our directory. But
933 * we check anyway. XXX
935 * Note that no timeout is set for the positive cache hit. We
936 * assume, theoretically, that ESTALE returns will be dealt with
937 * properly to handle NFS races and in anycase we cannot depend
938 * on a timeout to deal with NFS open/create/excl issues so instead
939 * of a bad hack here the rest of the NFS client code needs to do
942 nfsm_getfh(fhp
, fhsize
, v3
);
945 if (NFS_CMPFH(np
, fhp
, fhsize
)) {
949 error
= nfs_nget(dvp
->v_mount
, fhp
, fhsize
, &np
);
958 nfsm_postop_attr(nvp
, attrflag
, NFS_LATTR_NOSHRINK
);
959 nfsm_postop_attr(dvp
, attrflag
, NFS_LATTR_NOSHRINK
);
961 nfsm_loadattr(nvp
, NULL
);
963 nfs_cache_setvp(ap
->a_nch
, nvp
, nfspos_cache_timeout
);
977 * 'cached' nfs directory lookup
979 * NOTE: cannot be removed until NFS implements all the new n*() API calls.
981 * nfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
982 * struct componentname *a_cnp)
985 nfs_lookup(struct vop_old_lookup_args
*ap
)
987 struct componentname
*cnp
= ap
->a_cnp
;
988 struct vnode
*dvp
= ap
->a_dvp
;
989 struct vnode
**vpp
= ap
->a_vpp
;
990 int flags
= cnp
->cn_flags
;
995 struct nfsmount
*nmp
;
996 caddr_t bpos
, dpos
, cp2
;
997 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
1001 int lockparent
, wantparent
, error
= 0, attrflag
, fhsize
;
1002 int v3
= NFS_ISV3(dvp
);
1005 * Read-only mount check and directory check.
1008 if ((dvp
->v_mount
->mnt_flag
& MNT_RDONLY
) &&
1009 (cnp
->cn_nameiop
== NAMEI_DELETE
|| cnp
->cn_nameiop
== NAMEI_RENAME
))
1012 if (dvp
->v_type
!= VDIR
)
1016 * Look it up in the cache. Note that ENOENT is only returned if we
1017 * previously entered a negative hit (see later on). The additional
1018 * nfsneg_cache_timeout check causes previously cached results to
1019 * be instantly ignored if the negative caching is turned off.
1021 lockparent
= flags
& CNP_LOCKPARENT
;
1022 wantparent
= flags
& (CNP_LOCKPARENT
|CNP_WANTPARENT
);
1023 nmp
= VFSTONFS(dvp
->v_mount
);
1031 nfsstats
.lookupcache_misses
++;
1032 nfsstats
.rpccnt
[NFSPROC_LOOKUP
]++;
1033 len
= cnp
->cn_namelen
;
1034 nfsm_reqhead(dvp
, NFSPROC_LOOKUP
,
1035 NFSX_FH(v3
) + NFSX_UNSIGNED
+ nfsm_rndup(len
));
1036 nfsm_fhtom(dvp
, v3
);
1037 nfsm_strtom(cnp
->cn_nameptr
, len
, NFS_MAXNAMLEN
);
1038 nfsm_request(dvp
, NFSPROC_LOOKUP
, cnp
->cn_td
, cnp
->cn_cred
);
1040 nfsm_postop_attr(dvp
, attrflag
, NFS_LATTR_NOSHRINK
);
1044 nfsm_getfh(fhp
, fhsize
, v3
);
1047 * Handle RENAME case...
1049 if (cnp
->cn_nameiop
== NAMEI_RENAME
&& wantparent
) {
1050 if (NFS_CMPFH(np
, fhp
, fhsize
)) {
1054 error
= nfs_nget(dvp
->v_mount
, fhp
, fhsize
, &np
);
1061 nfsm_postop_attr(newvp
, attrflag
, NFS_LATTR_NOSHRINK
);
1062 nfsm_postop_attr(dvp
, attrflag
, NFS_LATTR_NOSHRINK
);
1064 nfsm_loadattr(newvp
, NULL
);
1069 cnp
->cn_flags
|= CNP_PDIRUNLOCK
;
1074 if (flags
& CNP_ISDOTDOT
) {
1076 cnp
->cn_flags
|= CNP_PDIRUNLOCK
;
1077 error
= nfs_nget(dvp
->v_mount
, fhp
, fhsize
, &np
);
1079 vn_lock(dvp
, LK_EXCLUSIVE
| LK_RETRY
);
1080 cnp
->cn_flags
&= ~CNP_PDIRUNLOCK
;
1081 return (error
); /* NOTE: return error from nget */
1085 error
= vn_lock(dvp
, LK_EXCLUSIVE
);
1090 cnp
->cn_flags
|= CNP_PDIRUNLOCK
;
1092 } else if (NFS_CMPFH(np
, fhp
, fhsize
)) {
1096 error
= nfs_nget(dvp
->v_mount
, fhp
, fhsize
, &np
);
1103 cnp
->cn_flags
|= CNP_PDIRUNLOCK
;
1108 nfsm_postop_attr(newvp
, attrflag
, NFS_LATTR_NOSHRINK
);
1109 nfsm_postop_attr(dvp
, attrflag
, NFS_LATTR_NOSHRINK
);
1111 nfsm_loadattr(newvp
, NULL
);
1113 /* XXX MOVE TO nfs_nremove() */
1114 if ((cnp
->cn_flags
& CNP_MAKEENTRY
) &&
1115 cnp
->cn_nameiop
!= NAMEI_DELETE
) {
1116 np
->n_ctime
= np
->n_vattr
.va_ctime
.tv_sec
; /* XXX */
1123 if (newvp
!= NULLVP
) {
1127 if ((cnp
->cn_nameiop
== NAMEI_CREATE
||
1128 cnp
->cn_nameiop
== NAMEI_RENAME
) &&
1132 cnp
->cn_flags
|= CNP_PDIRUNLOCK
;
1134 if (dvp
->v_mount
->mnt_flag
& MNT_RDONLY
)
1137 error
= EJUSTRETURN
;
1145 * Just call nfs_bioread() to do the work.
1147 * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1148 * struct ucred *a_cred)
1151 nfs_read(struct vop_read_args
*ap
)
1153 struct vnode
*vp
= ap
->a_vp
;
1155 return (nfs_bioread(vp
, ap
->a_uio
, ap
->a_ioflag
));
1161 * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
1164 nfs_readlink(struct vop_readlink_args
*ap
)
1166 struct vnode
*vp
= ap
->a_vp
;
1168 if (vp
->v_type
!= VLNK
)
1170 return (nfs_bioread(vp
, ap
->a_uio
, 0));
1174 * Do a readlink rpc.
1175 * Called by nfs_doio() from below the buffer cache.
1178 nfs_readlinkrpc(struct vnode
*vp
, struct uio
*uiop
)
1183 caddr_t bpos
, dpos
, cp2
;
1184 int error
= 0, len
, attrflag
;
1185 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
1186 int v3
= NFS_ISV3(vp
);
1188 nfsstats
.rpccnt
[NFSPROC_READLINK
]++;
1189 nfsm_reqhead(vp
, NFSPROC_READLINK
, NFSX_FH(v3
));
1191 nfsm_request(vp
, NFSPROC_READLINK
, uiop
->uio_td
, nfs_vpcred(vp
, ND_CHECK
));
1193 nfsm_postop_attr(vp
, attrflag
, NFS_LATTR_NOSHRINK
);
1195 nfsm_strsiz(len
, NFS_MAXPATHLEN
);
1196 if (len
== NFS_MAXPATHLEN
) {
1197 struct nfsnode
*np
= VTONFS(vp
);
1198 if (np
->n_size
&& np
->n_size
< NFS_MAXPATHLEN
)
1201 nfsm_mtouio(uiop
, len
);
1213 nfs_readrpc(struct vnode
*vp
, struct uio
*uiop
)
1218 caddr_t bpos
, dpos
, cp2
;
1219 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
1220 struct nfsmount
*nmp
;
1221 int error
= 0, len
, retlen
, tsiz
, eof
, attrflag
;
1222 int v3
= NFS_ISV3(vp
);
1227 nmp
= VFSTONFS(vp
->v_mount
);
1228 tsiz
= uiop
->uio_resid
;
1229 if (uiop
->uio_offset
+ tsiz
> nmp
->nm_maxfilesize
)
1232 nfsstats
.rpccnt
[NFSPROC_READ
]++;
1233 len
= (tsiz
> nmp
->nm_rsize
) ? nmp
->nm_rsize
: tsiz
;
1234 nfsm_reqhead(vp
, NFSPROC_READ
, NFSX_FH(v3
) + NFSX_UNSIGNED
* 3);
1236 nfsm_build(tl
, u_int32_t
*, NFSX_UNSIGNED
* 3);
1238 txdr_hyper(uiop
->uio_offset
, tl
);
1239 *(tl
+ 2) = txdr_unsigned(len
);
1241 *tl
++ = txdr_unsigned(uiop
->uio_offset
);
1242 *tl
++ = txdr_unsigned(len
);
1245 nfsm_request(vp
, NFSPROC_READ
, uiop
->uio_td
, nfs_vpcred(vp
, ND_READ
));
1247 nfsm_postop_attr(vp
, attrflag
, NFS_LATTR_NOSHRINK
);
1252 nfsm_dissect(tl
, u_int32_t
*, 2 * NFSX_UNSIGNED
);
1253 eof
= fxdr_unsigned(int, *(tl
+ 1));
1255 nfsm_loadattr(vp
, NULL
);
1256 nfsm_strsiz(retlen
, nmp
->nm_rsize
);
1257 nfsm_mtouio(uiop
, retlen
);
1261 if (eof
|| retlen
== 0) {
1264 } else if (retlen
< len
) {
1276 nfs_writerpc(struct vnode
*vp
, struct uio
*uiop
, int *iomode
, int *must_commit
)
1280 int32_t t1
, t2
, backup
;
1281 caddr_t bpos
, dpos
, cp2
;
1282 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
1283 struct nfsmount
*nmp
= VFSTONFS(vp
->v_mount
);
1284 int error
= 0, len
, tsiz
, wccflag
= NFSV3_WCCRATTR
, rlen
, commit
;
1285 int v3
= NFS_ISV3(vp
), committed
= NFSV3WRITE_FILESYNC
;
1288 if (uiop
->uio_iovcnt
!= 1)
1289 panic("nfs: writerpc iovcnt > 1");
1292 tsiz
= uiop
->uio_resid
;
1293 if (uiop
->uio_offset
+ tsiz
> nmp
->nm_maxfilesize
)
1296 nfsstats
.rpccnt
[NFSPROC_WRITE
]++;
1297 len
= (tsiz
> nmp
->nm_wsize
) ? nmp
->nm_wsize
: tsiz
;
1298 nfsm_reqhead(vp
, NFSPROC_WRITE
,
1299 NFSX_FH(v3
) + 5 * NFSX_UNSIGNED
+ nfsm_rndup(len
));
1302 nfsm_build(tl
, u_int32_t
*, 5 * NFSX_UNSIGNED
);
1303 txdr_hyper(uiop
->uio_offset
, tl
);
1305 *tl
++ = txdr_unsigned(len
);
1306 *tl
++ = txdr_unsigned(*iomode
);
1307 *tl
= txdr_unsigned(len
);
1311 nfsm_build(tl
, u_int32_t
*, 4 * NFSX_UNSIGNED
);
1312 /* Set both "begin" and "current" to non-garbage. */
1313 x
= txdr_unsigned((u_int32_t
)uiop
->uio_offset
);
1314 *tl
++ = x
; /* "begin offset" */
1315 *tl
++ = x
; /* "current offset" */
1316 x
= txdr_unsigned(len
);
1317 *tl
++ = x
; /* total to this offset */
1318 *tl
= x
; /* size of this write */
1320 nfsm_uiotom(uiop
, len
);
1321 nfsm_request(vp
, NFSPROC_WRITE
, uiop
->uio_td
, nfs_vpcred(vp
, ND_WRITE
));
1324 * The write RPC returns a before and after mtime. The
1325 * nfsm_wcc_data() macro checks the before n_mtime
1326 * against the before time and stores the after time
1327 * in the nfsnode's cached vattr and n_mtime field.
1328 * The NRMODIFIED bit will be set if the before
1329 * time did not match the original mtime.
1331 wccflag
= NFSV3_WCCCHK
;
1332 nfsm_wcc_data(vp
, wccflag
);
1334 nfsm_dissect(tl
, u_int32_t
*, 2 * NFSX_UNSIGNED
1335 + NFSX_V3WRITEVERF
);
1336 rlen
= fxdr_unsigned(int, *tl
++);
1341 } else if (rlen
< len
) {
1342 backup
= len
- rlen
;
1343 uiop
->uio_iov
->iov_base
= (char *)uiop
->uio_iov
->iov_base
- backup
;
1344 uiop
->uio_iov
->iov_len
+= backup
;
1345 uiop
->uio_offset
-= backup
;
1346 uiop
->uio_resid
+= backup
;
1349 commit
= fxdr_unsigned(int, *tl
++);
1352 * Return the lowest committment level
1353 * obtained by any of the RPCs.
1355 if (committed
== NFSV3WRITE_FILESYNC
)
1357 else if (committed
== NFSV3WRITE_DATASYNC
&&
1358 commit
== NFSV3WRITE_UNSTABLE
)
1360 if ((nmp
->nm_state
& NFSSTA_HASWRITEVERF
) == 0){
1361 bcopy((caddr_t
)tl
, (caddr_t
)nmp
->nm_verf
,
1363 nmp
->nm_state
|= NFSSTA_HASWRITEVERF
;
1364 } else if (bcmp((caddr_t
)tl
,
1365 (caddr_t
)nmp
->nm_verf
, NFSX_V3WRITEVERF
)) {
1367 bcopy((caddr_t
)tl
, (caddr_t
)nmp
->nm_verf
,
1372 nfsm_loadattr(vp
, NULL
);
1380 if (vp
->v_mount
->mnt_flag
& MNT_ASYNC
)
1381 committed
= NFSV3WRITE_FILESYNC
;
1382 *iomode
= committed
;
1384 uiop
->uio_resid
= tsiz
;
1390 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1391 * mode set to specify the file type and the size field for rdev.
1394 nfs_mknodrpc(struct vnode
*dvp
, struct vnode
**vpp
, struct componentname
*cnp
,
1397 struct nfsv2_sattr
*sp
;
1401 struct vnode
*newvp
= NULL
;
1402 struct nfsnode
*np
= NULL
;
1406 int error
= 0, wccflag
= NFSV3_WCCRATTR
, gotvp
= 0;
1407 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
1409 int v3
= NFS_ISV3(dvp
);
1411 if (vap
->va_type
== VCHR
|| vap
->va_type
== VBLK
) {
1412 rmajor
= txdr_unsigned(vap
->va_rmajor
);
1413 rminor
= txdr_unsigned(vap
->va_rminor
);
1414 } else if (vap
->va_type
== VFIFO
|| vap
->va_type
== VSOCK
) {
1415 rmajor
= nfs_xdrneg1
;
1416 rminor
= nfs_xdrneg1
;
1418 return (EOPNOTSUPP
);
1420 if ((error
= VOP_GETATTR(dvp
, &vattr
)) != 0) {
1423 nfsstats
.rpccnt
[NFSPROC_MKNOD
]++;
1424 nfsm_reqhead(dvp
, NFSPROC_MKNOD
, NFSX_FH(v3
) + 4 * NFSX_UNSIGNED
+
1425 + nfsm_rndup(cnp
->cn_namelen
) + NFSX_SATTR(v3
));
1426 nfsm_fhtom(dvp
, v3
);
1427 nfsm_strtom(cnp
->cn_nameptr
, cnp
->cn_namelen
, NFS_MAXNAMLEN
);
1429 nfsm_build(tl
, u_int32_t
*, NFSX_UNSIGNED
);
1430 *tl
++ = vtonfsv3_type(vap
->va_type
);
1431 nfsm_v3attrbuild(vap
, FALSE
);
1432 if (vap
->va_type
== VCHR
|| vap
->va_type
== VBLK
) {
1433 nfsm_build(tl
, u_int32_t
*, 2 * NFSX_UNSIGNED
);
1434 *tl
++ = txdr_unsigned(vap
->va_rmajor
);
1435 *tl
= txdr_unsigned(vap
->va_rminor
);
1438 nfsm_build(sp
, struct nfsv2_sattr
*, NFSX_V2SATTR
);
1439 sp
->sa_mode
= vtonfsv2_mode(vap
->va_type
, vap
->va_mode
);
1440 sp
->sa_uid
= nfs_xdrneg1
;
1441 sp
->sa_gid
= nfs_xdrneg1
;
1442 sp
->sa_size
= makeudev(rmajor
, rminor
);
1443 txdr_nfsv2time(&vap
->va_atime
, &sp
->sa_atime
);
1444 txdr_nfsv2time(&vap
->va_mtime
, &sp
->sa_mtime
);
1446 nfsm_request(dvp
, NFSPROC_MKNOD
, cnp
->cn_td
, cnp
->cn_cred
);
1448 nfsm_mtofh(dvp
, newvp
, v3
, gotvp
);
1454 error
= nfs_lookitup(dvp
, cnp
->cn_nameptr
,
1455 cnp
->cn_namelen
, cnp
->cn_cred
, cnp
->cn_td
, &np
);
1461 nfsm_wcc_data(dvp
, wccflag
);
1470 VTONFS(dvp
)->n_flag
|= NLMODIFIED
;
1472 VTONFS(dvp
)->n_attrstamp
= 0;
1478 * just call nfs_mknodrpc() to do the work.
1480 * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
1481 * struct componentname *a_cnp, struct vattr *a_vap)
1485 nfs_mknod(struct vop_old_mknod_args
*ap
)
1487 return nfs_mknodrpc(ap
->a_dvp
, ap
->a_vpp
, ap
->a_cnp
, ap
->a_vap
);
1490 static u_long create_verf
;
1492 * nfs file create call
1494 * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
1495 * struct componentname *a_cnp, struct vattr *a_vap)
1498 nfs_create(struct vop_old_create_args
*ap
)
1500 struct vnode
*dvp
= ap
->a_dvp
;
1501 struct vattr
*vap
= ap
->a_vap
;
1502 struct componentname
*cnp
= ap
->a_cnp
;
1503 struct nfsv2_sattr
*sp
;
1507 struct nfsnode
*np
= NULL
;
1508 struct vnode
*newvp
= NULL
;
1509 caddr_t bpos
, dpos
, cp2
;
1510 int error
= 0, wccflag
= NFSV3_WCCRATTR
, gotvp
= 0, fmode
= 0;
1511 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
1513 int v3
= NFS_ISV3(dvp
);
1516 * Oops, not for me..
1518 if (vap
->va_type
== VSOCK
)
1519 return (nfs_mknodrpc(dvp
, ap
->a_vpp
, cnp
, vap
));
1521 if ((error
= VOP_GETATTR(dvp
, &vattr
)) != 0) {
1524 if (vap
->va_vaflags
& VA_EXCLUSIVE
)
1527 nfsstats
.rpccnt
[NFSPROC_CREATE
]++;
1528 nfsm_reqhead(dvp
, NFSPROC_CREATE
, NFSX_FH(v3
) + 2 * NFSX_UNSIGNED
+
1529 nfsm_rndup(cnp
->cn_namelen
) + NFSX_SATTR(v3
));
1530 nfsm_fhtom(dvp
, v3
);
1531 nfsm_strtom(cnp
->cn_nameptr
, cnp
->cn_namelen
, NFS_MAXNAMLEN
);
1533 nfsm_build(tl
, u_int32_t
*, NFSX_UNSIGNED
);
1534 if (fmode
& O_EXCL
) {
1535 *tl
= txdr_unsigned(NFSV3CREATE_EXCLUSIVE
);
1536 nfsm_build(tl
, u_int32_t
*, NFSX_V3CREATEVERF
);
1538 if (!TAILQ_EMPTY(&in_ifaddrheads
[mycpuid
]))
1539 *tl
++ = IA_SIN(TAILQ_FIRST(&in_ifaddrheads
[mycpuid
])->ia
)->sin_addr
.s_addr
;
1542 *tl
++ = create_verf
;
1543 *tl
= ++create_verf
;
1545 *tl
= txdr_unsigned(NFSV3CREATE_UNCHECKED
);
1546 nfsm_v3attrbuild(vap
, FALSE
);
1549 nfsm_build(sp
, struct nfsv2_sattr
*, NFSX_V2SATTR
);
1550 sp
->sa_mode
= vtonfsv2_mode(vap
->va_type
, vap
->va_mode
);
1551 sp
->sa_uid
= nfs_xdrneg1
;
1552 sp
->sa_gid
= nfs_xdrneg1
;
1554 txdr_nfsv2time(&vap
->va_atime
, &sp
->sa_atime
);
1555 txdr_nfsv2time(&vap
->va_mtime
, &sp
->sa_mtime
);
1557 nfsm_request(dvp
, NFSPROC_CREATE
, cnp
->cn_td
, cnp
->cn_cred
);
1559 nfsm_mtofh(dvp
, newvp
, v3
, gotvp
);
1565 error
= nfs_lookitup(dvp
, cnp
->cn_nameptr
,
1566 cnp
->cn_namelen
, cnp
->cn_cred
, cnp
->cn_td
, &np
);
1572 nfsm_wcc_data(dvp
, wccflag
);
1576 if (v3
&& (fmode
& O_EXCL
) && error
== NFSERR_NOTSUPP
) {
1577 KKASSERT(newvp
== NULL
);
1581 } else if (v3
&& (fmode
& O_EXCL
)) {
1583 * We are normally called with only a partially initialized
1584 * VAP. Since the NFSv3 spec says that server may use the
1585 * file attributes to store the verifier, the spec requires
1586 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1587 * in atime, but we can't really assume that all servers will
1588 * so we ensure that our SETATTR sets both atime and mtime.
1590 if (vap
->va_mtime
.tv_sec
== VNOVAL
)
1591 vfs_timestamp(&vap
->va_mtime
);
1592 if (vap
->va_atime
.tv_sec
== VNOVAL
)
1593 vap
->va_atime
= vap
->va_mtime
;
1594 error
= nfs_setattrrpc(newvp
, vap
, cnp
->cn_cred
, cnp
->cn_td
);
1598 * The new np may have enough info for access
1599 * checks, make sure rucred and wucred are
1600 * initialized for read and write rpc's.
1603 if (np
->n_rucred
== NULL
)
1604 np
->n_rucred
= crhold(cnp
->cn_cred
);
1605 if (np
->n_wucred
== NULL
)
1606 np
->n_wucred
= crhold(cnp
->cn_cred
);
1611 VTONFS(dvp
)->n_flag
|= NLMODIFIED
;
1613 VTONFS(dvp
)->n_attrstamp
= 0;
1618 * nfs file remove call
1619 * To try and make nfs semantics closer to ufs semantics, a file that has
1620 * other processes using the vnode is renamed instead of removed and then
1621 * removed later on the last close.
1622 * - If v_sysref.refcnt > 1
1623 * If a rename is not already in the works
1624 * call nfs_sillyrename() to set it up
1628 * nfs_remove(struct vnode *a_dvp, struct vnode *a_vp,
1629 * struct componentname *a_cnp)
1632 nfs_remove(struct vop_old_remove_args
*ap
)
1634 struct vnode
*vp
= ap
->a_vp
;
1635 struct vnode
*dvp
= ap
->a_dvp
;
1636 struct componentname
*cnp
= ap
->a_cnp
;
1637 struct nfsnode
*np
= VTONFS(vp
);
1642 if (vp
->v_sysref
.refcnt
< 1)
1643 panic("nfs_remove: bad v_sysref.refcnt");
1645 if (vp
->v_type
== VDIR
)
1647 else if (vp
->v_sysref
.refcnt
== 1 || (np
->n_sillyrename
&&
1648 VOP_GETATTR(vp
, &vattr
) == 0 &&
1649 vattr
.va_nlink
> 1)) {
1651 * throw away biocache buffers, mainly to avoid
1652 * unnecessary delayed writes later.
1654 error
= nfs_vinvalbuf(vp
, 0, 1);
1657 error
= nfs_removerpc(dvp
, cnp
->cn_nameptr
,
1658 cnp
->cn_namelen
, cnp
->cn_cred
, cnp
->cn_td
);
1660 * Kludge City: If the first reply to the remove rpc is lost..
1661 * the reply to the retransmitted request will be ENOENT
1662 * since the file was in fact removed
1663 * Therefore, we cheat and return success.
1665 if (error
== ENOENT
)
1667 } else if (!np
->n_sillyrename
) {
1668 error
= nfs_sillyrename(dvp
, vp
, cnp
);
1670 np
->n_attrstamp
= 0;
1675 * nfs file remove rpc called from nfs_inactive
1678 nfs_removeit(struct sillyrename
*sp
)
1680 return (nfs_removerpc(sp
->s_dvp
, sp
->s_name
, sp
->s_namlen
,
1685 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1688 nfs_removerpc(struct vnode
*dvp
, const char *name
, int namelen
,
1689 struct ucred
*cred
, struct thread
*td
)
1694 caddr_t bpos
, dpos
, cp2
;
1695 int error
= 0, wccflag
= NFSV3_WCCRATTR
;
1696 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
1697 int v3
= NFS_ISV3(dvp
);
1699 nfsstats
.rpccnt
[NFSPROC_REMOVE
]++;
1700 nfsm_reqhead(dvp
, NFSPROC_REMOVE
,
1701 NFSX_FH(v3
) + NFSX_UNSIGNED
+ nfsm_rndup(namelen
));
1702 nfsm_fhtom(dvp
, v3
);
1703 nfsm_strtom(name
, namelen
, NFS_MAXNAMLEN
);
1704 nfsm_request(dvp
, NFSPROC_REMOVE
, td
, cred
);
1706 nfsm_wcc_data(dvp
, wccflag
);
1709 VTONFS(dvp
)->n_flag
|= NLMODIFIED
;
1711 VTONFS(dvp
)->n_attrstamp
= 0;
1716 * nfs file rename call
1718 * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
1719 * struct componentname *a_fcnp, struct vnode *a_tdvp,
1720 * struct vnode *a_tvp, struct componentname *a_tcnp)
1723 nfs_rename(struct vop_old_rename_args
*ap
)
1725 struct vnode
*fvp
= ap
->a_fvp
;
1726 struct vnode
*tvp
= ap
->a_tvp
;
1727 struct vnode
*fdvp
= ap
->a_fdvp
;
1728 struct vnode
*tdvp
= ap
->a_tdvp
;
1729 struct componentname
*tcnp
= ap
->a_tcnp
;
1730 struct componentname
*fcnp
= ap
->a_fcnp
;
1733 /* Check for cross-device rename */
1734 if ((fvp
->v_mount
!= tdvp
->v_mount
) ||
1735 (tvp
&& (fvp
->v_mount
!= tvp
->v_mount
))) {
1741 * We shouldn't have to flush fvp on rename for most server-side
1742 * filesystems as the file handle should not change. Unfortunately
1743 * the inode for some filesystems (msdosfs) might be tied to the
1744 * file name or directory position so to be completely safe
1745 * vfs.nfs.flush_on_rename is set by default. Clear to improve
1748 * We must flush tvp on rename because it might become stale on the
1749 * server after the rename.
1751 if (nfs_flush_on_rename
)
1752 VOP_FSYNC(fvp
, MNT_WAIT
);
1754 VOP_FSYNC(tvp
, MNT_WAIT
);
1757 * If the tvp exists and is in use, sillyrename it before doing the
1758 * rename of the new file over it.
1760 * XXX Can't sillyrename a directory.
1762 * We do not attempt to do any namecache purges in this old API
1763 * routine. The new API compat functions have access to the actual
1764 * namecache structures and will do it for us.
1766 if (tvp
&& tvp
->v_sysref
.refcnt
> 1 && !VTONFS(tvp
)->n_sillyrename
&&
1767 tvp
->v_type
!= VDIR
&& !nfs_sillyrename(tdvp
, tvp
, tcnp
)) {
1774 error
= nfs_renamerpc(fdvp
, fcnp
->cn_nameptr
, fcnp
->cn_namelen
,
1775 tdvp
, tcnp
->cn_nameptr
, tcnp
->cn_namelen
, tcnp
->cn_cred
,
1788 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1790 if (error
== ENOENT
)
1796 * nfs file rename rpc called from nfs_remove() above
1799 nfs_renameit(struct vnode
*sdvp
, struct componentname
*scnp
,
1800 struct sillyrename
*sp
)
1802 return (nfs_renamerpc(sdvp
, scnp
->cn_nameptr
, scnp
->cn_namelen
,
1803 sdvp
, sp
->s_name
, sp
->s_namlen
, scnp
->cn_cred
, scnp
->cn_td
));
1807 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1810 nfs_renamerpc(struct vnode
*fdvp
, const char *fnameptr
, int fnamelen
,
1811 struct vnode
*tdvp
, const char *tnameptr
, int tnamelen
,
1812 struct ucred
*cred
, struct thread
*td
)
1817 caddr_t bpos
, dpos
, cp2
;
1818 int error
= 0, fwccflag
= NFSV3_WCCRATTR
, twccflag
= NFSV3_WCCRATTR
;
1819 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
1820 int v3
= NFS_ISV3(fdvp
);
1822 nfsstats
.rpccnt
[NFSPROC_RENAME
]++;
1823 nfsm_reqhead(fdvp
, NFSPROC_RENAME
,
1824 (NFSX_FH(v3
) + NFSX_UNSIGNED
)*2 + nfsm_rndup(fnamelen
) +
1825 nfsm_rndup(tnamelen
));
1826 nfsm_fhtom(fdvp
, v3
);
1827 nfsm_strtom(fnameptr
, fnamelen
, NFS_MAXNAMLEN
);
1828 nfsm_fhtom(tdvp
, v3
);
1829 nfsm_strtom(tnameptr
, tnamelen
, NFS_MAXNAMLEN
);
1830 nfsm_request(fdvp
, NFSPROC_RENAME
, td
, cred
);
1832 nfsm_wcc_data(fdvp
, fwccflag
);
1833 nfsm_wcc_data(tdvp
, twccflag
);
1837 VTONFS(fdvp
)->n_flag
|= NLMODIFIED
;
1838 VTONFS(tdvp
)->n_flag
|= NLMODIFIED
;
1840 VTONFS(fdvp
)->n_attrstamp
= 0;
1842 VTONFS(tdvp
)->n_attrstamp
= 0;
1847 * nfs hard link create call
1849 * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp,
1850 * struct componentname *a_cnp)
1853 nfs_link(struct vop_old_link_args
*ap
)
1855 struct vnode
*vp
= ap
->a_vp
;
1856 struct vnode
*tdvp
= ap
->a_tdvp
;
1857 struct componentname
*cnp
= ap
->a_cnp
;
1861 caddr_t bpos
, dpos
, cp2
;
1862 int error
= 0, wccflag
= NFSV3_WCCRATTR
, attrflag
= 0;
1863 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
1866 if (vp
->v_mount
!= tdvp
->v_mount
) {
1871 * The attribute cache may get out of sync with the server on link.
1872 * Pushing writes to the server before handle was inherited from
1873 * long long ago and it is unclear if we still need to do this.
1876 if (nfs_flush_on_hlink
)
1877 VOP_FSYNC(vp
, MNT_WAIT
);
1880 nfsstats
.rpccnt
[NFSPROC_LINK
]++;
1881 nfsm_reqhead(vp
, NFSPROC_LINK
,
1882 NFSX_FH(v3
)*2 + NFSX_UNSIGNED
+ nfsm_rndup(cnp
->cn_namelen
));
1884 nfsm_fhtom(tdvp
, v3
);
1885 nfsm_strtom(cnp
->cn_nameptr
, cnp
->cn_namelen
, NFS_MAXNAMLEN
);
1886 nfsm_request(vp
, NFSPROC_LINK
, cnp
->cn_td
, cnp
->cn_cred
);
1888 nfsm_postop_attr(vp
, attrflag
, NFS_LATTR_NOSHRINK
);
1889 nfsm_wcc_data(tdvp
, wccflag
);
1893 VTONFS(tdvp
)->n_flag
|= NLMODIFIED
;
1895 VTONFS(vp
)->n_attrstamp
= 0;
1897 VTONFS(tdvp
)->n_attrstamp
= 0;
1899 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1901 if (error
== EEXIST
)
1907 * nfs symbolic link create call
1909 * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1910 * struct componentname *a_cnp, struct vattr *a_vap,
1914 nfs_symlink(struct vop_old_symlink_args
*ap
)
1916 struct vnode
*dvp
= ap
->a_dvp
;
1917 struct vattr
*vap
= ap
->a_vap
;
1918 struct componentname
*cnp
= ap
->a_cnp
;
1919 struct nfsv2_sattr
*sp
;
1923 caddr_t bpos
, dpos
, cp2
;
1924 int slen
, error
= 0, wccflag
= NFSV3_WCCRATTR
, gotvp
;
1925 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
1926 struct vnode
*newvp
= NULL
;
1927 int v3
= NFS_ISV3(dvp
);
1929 nfsstats
.rpccnt
[NFSPROC_SYMLINK
]++;
1930 slen
= strlen(ap
->a_target
);
1931 nfsm_reqhead(dvp
, NFSPROC_SYMLINK
, NFSX_FH(v3
) + 2*NFSX_UNSIGNED
+
1932 nfsm_rndup(cnp
->cn_namelen
) + nfsm_rndup(slen
) + NFSX_SATTR(v3
));
1933 nfsm_fhtom(dvp
, v3
);
1934 nfsm_strtom(cnp
->cn_nameptr
, cnp
->cn_namelen
, NFS_MAXNAMLEN
);
1936 nfsm_v3attrbuild(vap
, FALSE
);
1938 nfsm_strtom(ap
->a_target
, slen
, NFS_MAXPATHLEN
);
1940 nfsm_build(sp
, struct nfsv2_sattr
*, NFSX_V2SATTR
);
1941 sp
->sa_mode
= vtonfsv2_mode(VLNK
, vap
->va_mode
);
1942 sp
->sa_uid
= nfs_xdrneg1
;
1943 sp
->sa_gid
= nfs_xdrneg1
;
1944 sp
->sa_size
= nfs_xdrneg1
;
1945 txdr_nfsv2time(&vap
->va_atime
, &sp
->sa_atime
);
1946 txdr_nfsv2time(&vap
->va_mtime
, &sp
->sa_mtime
);
1950 * Issue the NFS request and get the rpc response.
1952 * Only NFSv3 responses returning an error of 0 actually return
1953 * a file handle that can be converted into newvp without having
1954 * to do an extra lookup rpc.
1956 nfsm_request(dvp
, NFSPROC_SYMLINK
, cnp
->cn_td
, cnp
->cn_cred
);
1959 nfsm_mtofh(dvp
, newvp
, v3
, gotvp
);
1960 nfsm_wcc_data(dvp
, wccflag
);
1964 * out code jumps -> here, mrep is also freed.
1971 * If we get an EEXIST error, silently convert it to no-error
1972 * in case of an NFS retry.
1974 if (error
== EEXIST
)
1978 * If we do not have (or no longer have) an error, and we could
1979 * not extract the newvp from the response due to the request being
1980 * NFSv2 or the error being EEXIST. We have to do a lookup in order
1981 * to obtain a newvp to return.
1983 if (error
== 0 && newvp
== NULL
) {
1984 struct nfsnode
*np
= NULL
;
1986 error
= nfs_lookitup(dvp
, cnp
->cn_nameptr
, cnp
->cn_namelen
,
1987 cnp
->cn_cred
, cnp
->cn_td
, &np
);
1997 VTONFS(dvp
)->n_flag
|= NLMODIFIED
;
1999 VTONFS(dvp
)->n_attrstamp
= 0;
2006 * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
2007 * struct componentname *a_cnp, struct vattr *a_vap)
2010 nfs_mkdir(struct vop_old_mkdir_args
*ap
)
2012 struct vnode
*dvp
= ap
->a_dvp
;
2013 struct vattr
*vap
= ap
->a_vap
;
2014 struct componentname
*cnp
= ap
->a_cnp
;
2015 struct nfsv2_sattr
*sp
;
2020 struct nfsnode
*np
= NULL
;
2021 struct vnode
*newvp
= NULL
;
2022 caddr_t bpos
, dpos
, cp2
;
2023 int error
= 0, wccflag
= NFSV3_WCCRATTR
;
2025 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
2027 int v3
= NFS_ISV3(dvp
);
2029 if ((error
= VOP_GETATTR(dvp
, &vattr
)) != 0) {
2032 len
= cnp
->cn_namelen
;
2033 nfsstats
.rpccnt
[NFSPROC_MKDIR
]++;
2034 nfsm_reqhead(dvp
, NFSPROC_MKDIR
,
2035 NFSX_FH(v3
) + NFSX_UNSIGNED
+ nfsm_rndup(len
) + NFSX_SATTR(v3
));
2036 nfsm_fhtom(dvp
, v3
);
2037 nfsm_strtom(cnp
->cn_nameptr
, len
, NFS_MAXNAMLEN
);
2039 nfsm_v3attrbuild(vap
, FALSE
);
2041 nfsm_build(sp
, struct nfsv2_sattr
*, NFSX_V2SATTR
);
2042 sp
->sa_mode
= vtonfsv2_mode(VDIR
, vap
->va_mode
);
2043 sp
->sa_uid
= nfs_xdrneg1
;
2044 sp
->sa_gid
= nfs_xdrneg1
;
2045 sp
->sa_size
= nfs_xdrneg1
;
2046 txdr_nfsv2time(&vap
->va_atime
, &sp
->sa_atime
);
2047 txdr_nfsv2time(&vap
->va_mtime
, &sp
->sa_mtime
);
2049 nfsm_request(dvp
, NFSPROC_MKDIR
, cnp
->cn_td
, cnp
->cn_cred
);
2051 nfsm_mtofh(dvp
, newvp
, v3
, gotvp
);
2053 nfsm_wcc_data(dvp
, wccflag
);
2056 VTONFS(dvp
)->n_flag
|= NLMODIFIED
;
2058 VTONFS(dvp
)->n_attrstamp
= 0;
2060 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
2061 * if we can succeed in looking up the directory.
2063 if (error
== EEXIST
|| (!error
&& !gotvp
)) {
2068 error
= nfs_lookitup(dvp
, cnp
->cn_nameptr
, len
, cnp
->cn_cred
,
2072 if (newvp
->v_type
!= VDIR
)
2085 * nfs remove directory call
2087 * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
2088 * struct componentname *a_cnp)
2091 nfs_rmdir(struct vop_old_rmdir_args
*ap
)
2093 struct vnode
*vp
= ap
->a_vp
;
2094 struct vnode
*dvp
= ap
->a_dvp
;
2095 struct componentname
*cnp
= ap
->a_cnp
;
2099 caddr_t bpos
, dpos
, cp2
;
2100 int error
= 0, wccflag
= NFSV3_WCCRATTR
;
2101 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
2102 int v3
= NFS_ISV3(dvp
);
2106 nfsstats
.rpccnt
[NFSPROC_RMDIR
]++;
2107 nfsm_reqhead(dvp
, NFSPROC_RMDIR
,
2108 NFSX_FH(v3
) + NFSX_UNSIGNED
+ nfsm_rndup(cnp
->cn_namelen
));
2109 nfsm_fhtom(dvp
, v3
);
2110 nfsm_strtom(cnp
->cn_nameptr
, cnp
->cn_namelen
, NFS_MAXNAMLEN
);
2111 nfsm_request(dvp
, NFSPROC_RMDIR
, cnp
->cn_td
, cnp
->cn_cred
);
2113 nfsm_wcc_data(dvp
, wccflag
);
2116 VTONFS(dvp
)->n_flag
|= NLMODIFIED
;
2118 VTONFS(dvp
)->n_attrstamp
= 0;
2120 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2122 if (error
== ENOENT
)
2130 * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
2133 nfs_readdir(struct vop_readdir_args
*ap
)
2135 struct vnode
*vp
= ap
->a_vp
;
2136 struct nfsnode
*np
= VTONFS(vp
);
2137 struct uio
*uio
= ap
->a_uio
;
2141 if (vp
->v_type
!= VDIR
)
2144 if ((error
= vn_lock(vp
, LK_EXCLUSIVE
| LK_RETRY
)) != 0)
2148 * If we have a valid EOF offset cache we must call VOP_GETATTR()
2149 * and then check that is still valid, or if this is an NQNFS mount
2150 * we call NQNFS_CKCACHEABLE() instead of VOP_GETATTR(). Note that
2151 * VOP_GETATTR() does not necessarily go to the wire.
2153 if (np
->n_direofoffset
> 0 && uio
->uio_offset
>= np
->n_direofoffset
&&
2154 (np
->n_flag
& (NLMODIFIED
|NRMODIFIED
)) == 0) {
2155 if (VOP_GETATTR(vp
, &vattr
) == 0 &&
2156 (np
->n_flag
& (NLMODIFIED
|NRMODIFIED
)) == 0
2158 nfsstats
.direofcache_hits
++;
2164 * Call nfs_bioread() to do the real work. nfs_bioread() does its
2165 * own cache coherency checks so we do not have to.
2167 tresid
= uio
->uio_resid
;
2168 error
= nfs_bioread(vp
, uio
, 0);
2170 if (!error
&& uio
->uio_resid
== tresid
)
2171 nfsstats
.direofcache_misses
++;
2178 * Readdir rpc call. nfs_bioread->nfs_doio->nfs_readdirrpc.
2180 * Note that for directories, nfs_bioread maintains the underlying nfs-centric
2181 * offset/block and converts the nfs formatted directory entries for userland
2182 * consumption as well as deals with offsets into the middle of blocks.
2183 * nfs_doio only deals with logical blocks. In particular, uio_offset will
2184 * be block-bounded. It must convert to cookies for the actual RPC.
2187 nfs_readdirrpc(struct vnode
*vp
, struct uio
*uiop
)
2190 struct nfs_dirent
*dp
= NULL
;
2195 caddr_t bpos
, dpos
, cp2
;
2196 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
2198 struct nfsmount
*nmp
= VFSTONFS(vp
->v_mount
);
2199 struct nfsnode
*dnp
= VTONFS(vp
);
2201 int error
= 0, tlen
, more_dirs
= 1, blksiz
= 0, bigenough
= 1;
2203 int v3
= NFS_ISV3(vp
);
2206 if (uiop
->uio_iovcnt
!= 1 || (uiop
->uio_offset
& (DIRBLKSIZ
- 1)) ||
2207 (uiop
->uio_resid
& (DIRBLKSIZ
- 1)))
2208 panic("nfs readdirrpc bad uio");
2212 * If there is no cookie, assume directory was stale.
2214 cookiep
= nfs_getcookie(dnp
, uiop
->uio_offset
, 0);
2218 return (NFSERR_BAD_COOKIE
);
2220 * Loop around doing readdir rpc's of size nm_readdirsize
2221 * truncated to a multiple of DIRBLKSIZ.
2222 * The stopping criteria is EOF or buffer full.
2224 while (more_dirs
&& bigenough
) {
2225 nfsstats
.rpccnt
[NFSPROC_READDIR
]++;
2226 nfsm_reqhead(vp
, NFSPROC_READDIR
, NFSX_FH(v3
) +
2230 nfsm_build(tl
, u_int32_t
*, 5 * NFSX_UNSIGNED
);
2231 *tl
++ = cookie
.nfsuquad
[0];
2232 *tl
++ = cookie
.nfsuquad
[1];
2233 *tl
++ = dnp
->n_cookieverf
.nfsuquad
[0];
2234 *tl
++ = dnp
->n_cookieverf
.nfsuquad
[1];
2236 nfsm_build(tl
, u_int32_t
*, 2 * NFSX_UNSIGNED
);
2237 *tl
++ = cookie
.nfsuquad
[0];
2239 *tl
= txdr_unsigned(nmp
->nm_readdirsize
);
2240 nfsm_request(vp
, NFSPROC_READDIR
, uiop
->uio_td
, nfs_vpcred(vp
, ND_READ
));
2242 nfsm_postop_attr(vp
, attrflag
, NFS_LATTR_NOSHRINK
);
2244 nfsm_dissect(tl
, u_int32_t
*,
2246 dnp
->n_cookieverf
.nfsuquad
[0] = *tl
++;
2247 dnp
->n_cookieverf
.nfsuquad
[1] = *tl
;
2253 nfsm_dissect(tl
, u_int32_t
*, NFSX_UNSIGNED
);
2254 more_dirs
= fxdr_unsigned(int, *tl
);
2256 /* loop thru the dir entries, converting them to std form */
2257 while (more_dirs
&& bigenough
) {
2259 nfsm_dissect(tl
, u_int32_t
*,
2261 fileno
= fxdr_hyper(tl
);
2262 len
= fxdr_unsigned(int, *(tl
+ 2));
2264 nfsm_dissect(tl
, u_int32_t
*,
2266 fileno
= fxdr_unsigned(u_quad_t
, *tl
++);
2267 len
= fxdr_unsigned(int, *tl
);
2269 if (len
<= 0 || len
> NFS_MAXNAMLEN
) {
2276 * len is the number of bytes in the path element
2277 * name, not including the \0 termination.
2279 * tlen is the number of bytes w have to reserve for
2280 * the path element name.
2282 tlen
= nfsm_rndup(len
);
2284 tlen
+= 4; /* To ensure null termination */
2287 * If the entry would cross a DIRBLKSIZ boundary,
2288 * extend the previous nfs_dirent to cover the
2291 left
= DIRBLKSIZ
- blksiz
;
2292 if ((tlen
+ sizeof(struct nfs_dirent
)) > left
) {
2293 dp
->nfs_reclen
+= left
;
2294 uiop
->uio_iov
->iov_base
= (char *)uiop
->uio_iov
->iov_base
+ left
;
2295 uiop
->uio_iov
->iov_len
-= left
;
2296 uiop
->uio_offset
+= left
;
2297 uiop
->uio_resid
-= left
;
2300 if ((tlen
+ sizeof(struct nfs_dirent
)) > uiop
->uio_resid
)
2303 dp
= (struct nfs_dirent
*)uiop
->uio_iov
->iov_base
;
2304 dp
->nfs_ino
= fileno
;
2305 dp
->nfs_namlen
= len
;
2306 dp
->nfs_reclen
= tlen
+ sizeof(struct nfs_dirent
);
2307 dp
->nfs_type
= DT_UNKNOWN
;
2308 blksiz
+= dp
->nfs_reclen
;
2309 if (blksiz
== DIRBLKSIZ
)
2311 uiop
->uio_offset
+= sizeof(struct nfs_dirent
);
2312 uiop
->uio_resid
-= sizeof(struct nfs_dirent
);
2313 uiop
->uio_iov
->iov_base
= (char *)uiop
->uio_iov
->iov_base
+ sizeof(struct nfs_dirent
);
2314 uiop
->uio_iov
->iov_len
-= sizeof(struct nfs_dirent
);
2315 nfsm_mtouio(uiop
, len
);
2318 * The uiop has advanced by nfs_dirent + len
2319 * but really needs to advance by
2322 cp
= uiop
->uio_iov
->iov_base
;
2324 *cp
= '\0'; /* null terminate */
2325 uiop
->uio_iov
->iov_base
= (char *)uiop
->uio_iov
->iov_base
+ tlen
;
2326 uiop
->uio_iov
->iov_len
-= tlen
;
2327 uiop
->uio_offset
+= tlen
;
2328 uiop
->uio_resid
-= tlen
;
2331 * NFS strings must be rounded up (nfsm_myouio
2332 * handled that in the bigenough case).
2334 nfsm_adv(nfsm_rndup(len
));
2337 nfsm_dissect(tl
, u_int32_t
*,
2340 nfsm_dissect(tl
, u_int32_t
*,
2345 * If we were able to accomodate the last entry,
2346 * get the cookie for the next one. Otherwise
2347 * hold-over the cookie for the one we were not
2348 * able to accomodate.
2351 cookie
.nfsuquad
[0] = *tl
++;
2353 cookie
.nfsuquad
[1] = *tl
++;
2359 more_dirs
= fxdr_unsigned(int, *tl
);
2362 * If at end of rpc data, get the eof boolean
2365 nfsm_dissect(tl
, u_int32_t
*, NFSX_UNSIGNED
);
2366 more_dirs
= (fxdr_unsigned(int, *tl
) == 0);
2371 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2372 * by increasing d_reclen for the last record.
2375 left
= DIRBLKSIZ
- blksiz
;
2376 dp
->nfs_reclen
+= left
;
2377 uiop
->uio_iov
->iov_base
= (char *)uiop
->uio_iov
->iov_base
+ left
;
2378 uiop
->uio_iov
->iov_len
-= left
;
2379 uiop
->uio_offset
+= left
;
2380 uiop
->uio_resid
-= left
;
2385 * We hit the end of the directory, update direofoffset.
2387 dnp
->n_direofoffset
= uiop
->uio_offset
;
2390 * There is more to go, insert the link cookie so the
2391 * next block can be read.
2393 if (uiop
->uio_resid
> 0)
2394 kprintf("EEK! readdirrpc resid > 0\n");
2395 cookiep
= nfs_getcookie(dnp
, uiop
->uio_offset
, 1);
2403 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2406 nfs_readdirplusrpc(struct vnode
*vp
, struct uio
*uiop
)
2409 struct nfs_dirent
*dp
;
2413 struct vnode
*newvp
;
2415 caddr_t bpos
, dpos
, cp2
, dpossav1
, dpossav2
;
2416 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
, *mdsav1
, *mdsav2
;
2418 struct nfsmount
*nmp
= VFSTONFS(vp
->v_mount
);
2419 struct nfsnode
*dnp
= VTONFS(vp
), *np
;
2422 int error
= 0, tlen
, more_dirs
= 1, blksiz
= 0, doit
, bigenough
= 1, i
;
2423 int attrflag
, fhsize
;
2424 struct nchandle nch
;
2425 struct nchandle dnch
;
2426 struct nlcomponent nlc
;
2432 if (uiop
->uio_iovcnt
!= 1 || (uiop
->uio_offset
& (DIRBLKSIZ
- 1)) ||
2433 (uiop
->uio_resid
& (DIRBLKSIZ
- 1)))
2434 panic("nfs readdirplusrpc bad uio");
2437 * Obtain the namecache record for the directory so we have something
2438 * to use as a basis for creating the entries. This function will
2439 * return a held (but not locked) ncp. The ncp may be disconnected
2440 * from the tree and cannot be used for upward traversals, and the
2441 * ncp may be unnamed. Note that other unrelated operations may
2442 * cause the ncp to be named at any time.
2444 cache_fromdvp(vp
, NULL
, 0, &dnch
);
2445 bzero(&nlc
, sizeof(nlc
));
2449 * If there is no cookie, assume directory was stale.
2451 cookiep
= nfs_getcookie(dnp
, uiop
->uio_offset
, 0);
2455 return (NFSERR_BAD_COOKIE
);
2457 * Loop around doing readdir rpc's of size nm_readdirsize
2458 * truncated to a multiple of DIRBLKSIZ.
2459 * The stopping criteria is EOF or buffer full.
2461 while (more_dirs
&& bigenough
) {
2462 nfsstats
.rpccnt
[NFSPROC_READDIRPLUS
]++;
2463 nfsm_reqhead(vp
, NFSPROC_READDIRPLUS
,
2464 NFSX_FH(1) + 6 * NFSX_UNSIGNED
);
2466 nfsm_build(tl
, u_int32_t
*, 6 * NFSX_UNSIGNED
);
2467 *tl
++ = cookie
.nfsuquad
[0];
2468 *tl
++ = cookie
.nfsuquad
[1];
2469 *tl
++ = dnp
->n_cookieverf
.nfsuquad
[0];
2470 *tl
++ = dnp
->n_cookieverf
.nfsuquad
[1];
2471 *tl
++ = txdr_unsigned(nmp
->nm_readdirsize
);
2472 *tl
= txdr_unsigned(nmp
->nm_rsize
);
2473 nfsm_request(vp
, NFSPROC_READDIRPLUS
, uiop
->uio_td
, nfs_vpcred(vp
, ND_READ
));
2474 nfsm_postop_attr(vp
, attrflag
, NFS_LATTR_NOSHRINK
);
2479 nfsm_dissect(tl
, u_int32_t
*, 3 * NFSX_UNSIGNED
);
2480 dnp
->n_cookieverf
.nfsuquad
[0] = *tl
++;
2481 dnp
->n_cookieverf
.nfsuquad
[1] = *tl
++;
2482 more_dirs
= fxdr_unsigned(int, *tl
);
2484 /* loop thru the dir entries, doctoring them to 4bsd form */
2485 while (more_dirs
&& bigenough
) {
2486 nfsm_dissect(tl
, u_int32_t
*, 3 * NFSX_UNSIGNED
);
2487 fileno
= fxdr_hyper(tl
);
2488 len
= fxdr_unsigned(int, *(tl
+ 2));
2489 if (len
<= 0 || len
> NFS_MAXNAMLEN
) {
2494 tlen
= nfsm_rndup(len
);
2496 tlen
+= 4; /* To ensure null termination*/
2497 left
= DIRBLKSIZ
- blksiz
;
2498 if ((tlen
+ sizeof(struct nfs_dirent
)) > left
) {
2499 dp
->nfs_reclen
+= left
;
2500 uiop
->uio_iov
->iov_base
= (char *)uiop
->uio_iov
->iov_base
+ left
;
2501 uiop
->uio_iov
->iov_len
-= left
;
2502 uiop
->uio_offset
+= left
;
2503 uiop
->uio_resid
-= left
;
2506 if ((tlen
+ sizeof(struct nfs_dirent
)) > uiop
->uio_resid
)
2509 dp
= (struct nfs_dirent
*)uiop
->uio_iov
->iov_base
;
2510 dp
->nfs_ino
= fileno
;
2511 dp
->nfs_namlen
= len
;
2512 dp
->nfs_reclen
= tlen
+ sizeof(struct nfs_dirent
);
2513 dp
->nfs_type
= DT_UNKNOWN
;
2514 blksiz
+= dp
->nfs_reclen
;
2515 if (blksiz
== DIRBLKSIZ
)
2517 uiop
->uio_offset
+= sizeof(struct nfs_dirent
);
2518 uiop
->uio_resid
-= sizeof(struct nfs_dirent
);
2519 uiop
->uio_iov
->iov_base
= (char *)uiop
->uio_iov
->iov_base
+ sizeof(struct nfs_dirent
);
2520 uiop
->uio_iov
->iov_len
-= sizeof(struct nfs_dirent
);
2521 nlc
.nlc_nameptr
= uiop
->uio_iov
->iov_base
;
2522 nlc
.nlc_namelen
= len
;
2523 nfsm_mtouio(uiop
, len
);
2524 cp
= uiop
->uio_iov
->iov_base
;
2527 uiop
->uio_iov
->iov_base
= (char *)uiop
->uio_iov
->iov_base
+ tlen
;
2528 uiop
->uio_iov
->iov_len
-= tlen
;
2529 uiop
->uio_offset
+= tlen
;
2530 uiop
->uio_resid
-= tlen
;
2532 nfsm_adv(nfsm_rndup(len
));
2533 nfsm_dissect(tl
, u_int32_t
*, 3 * NFSX_UNSIGNED
);
2535 cookie
.nfsuquad
[0] = *tl
++;
2536 cookie
.nfsuquad
[1] = *tl
++;
2541 * Since the attributes are before the file handle
2542 * (sigh), we must skip over the attributes and then
2543 * come back and get them.
2545 attrflag
= fxdr_unsigned(int, *tl
);
2549 nfsm_adv(NFSX_V3FATTR
);
2550 nfsm_dissect(tl
, u_int32_t
*, NFSX_UNSIGNED
);
2551 doit
= fxdr_unsigned(int, *tl
);
2553 nfsm_getfh(fhp
, fhsize
, 1);
2554 if (NFS_CMPFH(dnp
, fhp
, fhsize
)) {
2559 error
= nfs_nget(vp
->v_mount
, fhp
,
2567 if (doit
&& bigenough
) {
2572 nfsm_loadattr(newvp
, NULL
);
2576 IFTODT(VTTOIF(np
->n_vattr
.va_type
));
2578 kprintf("NFS/READDIRPLUS, ENTER %*.*s\n",
2579 nlc
.nlc_namelen
, nlc
.nlc_namelen
,
2581 nch
= cache_nlookup(&dnch
, &nlc
);
2582 cache_setunresolved(&nch
);
2583 nfs_cache_setvp(&nch
, newvp
,
2584 nfspos_cache_timeout
);
2587 kprintf("NFS/READDIRPLUS, UNABLE TO ENTER"
2589 nlc
.nlc_namelen
, nlc
.nlc_namelen
,
2594 /* Just skip over the file handle */
2595 nfsm_dissect(tl
, u_int32_t
*, NFSX_UNSIGNED
);
2596 i
= fxdr_unsigned(int, *tl
);
2597 nfsm_adv(nfsm_rndup(i
));
2599 if (newvp
!= NULLVP
) {
2606 nfsm_dissect(tl
, u_int32_t
*, NFSX_UNSIGNED
);
2607 more_dirs
= fxdr_unsigned(int, *tl
);
2610 * If at end of rpc data, get the eof boolean
2613 nfsm_dissect(tl
, u_int32_t
*, NFSX_UNSIGNED
);
2614 more_dirs
= (fxdr_unsigned(int, *tl
) == 0);
2619 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2620 * by increasing d_reclen for the last record.
2623 left
= DIRBLKSIZ
- blksiz
;
2624 dp
->nfs_reclen
+= left
;
2625 uiop
->uio_iov
->iov_base
= (char *)uiop
->uio_iov
->iov_base
+ left
;
2626 uiop
->uio_iov
->iov_len
-= left
;
2627 uiop
->uio_offset
+= left
;
2628 uiop
->uio_resid
-= left
;
2632 * We are now either at the end of the directory or have filled the
2636 dnp
->n_direofoffset
= uiop
->uio_offset
;
2638 if (uiop
->uio_resid
> 0)
2639 kprintf("EEK! readdirplusrpc resid > 0\n");
2640 cookiep
= nfs_getcookie(dnp
, uiop
->uio_offset
, 1);
2644 if (newvp
!= NULLVP
) {
2657 * Silly rename. To make the NFS filesystem that is stateless look a little
2658 * more like the "ufs" a remove of an active vnode is translated to a rename
2659 * to a funny looking filename that is removed by nfs_inactive on the
2660 * nfsnode. There is the potential for another process on a different client
2661 * to create the same funny name between the nfs_lookitup() fails and the
2662 * nfs_rename() completes, but...
2665 nfs_sillyrename(struct vnode
*dvp
, struct vnode
*vp
, struct componentname
*cnp
)
2667 struct sillyrename
*sp
;
2672 * We previously purged dvp instead of vp. I don't know why, it
2673 * completely destroys performance. We can't do it anyway with the
2674 * new VFS API since we would be breaking the namecache topology.
2676 cache_purge(vp
); /* XXX */
2679 if (vp
->v_type
== VDIR
)
2680 panic("nfs: sillyrename dir");
2682 MALLOC(sp
, struct sillyrename
*, sizeof (struct sillyrename
),
2683 M_NFSREQ
, M_WAITOK
);
2684 sp
->s_cred
= crdup(cnp
->cn_cred
);
2688 /* Fudge together a funny name */
2689 sp
->s_namlen
= ksprintf(sp
->s_name
, ".nfsA%08x4.4",
2690 (int)(intptr_t)cnp
->cn_td
);
2692 /* Try lookitups until we get one that isn't there */
2693 while (nfs_lookitup(dvp
, sp
->s_name
, sp
->s_namlen
, sp
->s_cred
,
2694 cnp
->cn_td
, NULL
) == 0) {
2696 if (sp
->s_name
[4] > 'z') {
2701 error
= nfs_renameit(dvp
, cnp
, sp
);
2704 error
= nfs_lookitup(dvp
, sp
->s_name
, sp
->s_namlen
, sp
->s_cred
,
2706 np
->n_sillyrename
= sp
;
2711 kfree((caddr_t
)sp
, M_NFSREQ
);
2716 * Look up a file name and optionally either update the file handle or
2717 * allocate an nfsnode, depending on the value of npp.
2718 * npp == NULL --> just do the lookup
2719 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2721 * *npp != NULL --> update the file handle in the vnode
2724 nfs_lookitup(struct vnode
*dvp
, const char *name
, int len
, struct ucred
*cred
,
2725 struct thread
*td
, struct nfsnode
**npp
)
2730 struct vnode
*newvp
= NULL
;
2731 struct nfsnode
*np
, *dnp
= VTONFS(dvp
);
2732 caddr_t bpos
, dpos
, cp2
;
2733 int error
= 0, fhlen
, attrflag
;
2734 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
2736 int v3
= NFS_ISV3(dvp
);
2738 nfsstats
.rpccnt
[NFSPROC_LOOKUP
]++;
2739 nfsm_reqhead(dvp
, NFSPROC_LOOKUP
,
2740 NFSX_FH(v3
) + NFSX_UNSIGNED
+ nfsm_rndup(len
));
2741 nfsm_fhtom(dvp
, v3
);
2742 nfsm_strtom(name
, len
, NFS_MAXNAMLEN
);
2743 nfsm_request(dvp
, NFSPROC_LOOKUP
, td
, cred
);
2744 if (npp
&& !error
) {
2745 nfsm_getfh(nfhp
, fhlen
, v3
);
2748 if (np
->n_fhsize
> NFS_SMALLFH
&& fhlen
<= NFS_SMALLFH
) {
2749 kfree((caddr_t
)np
->n_fhp
, M_NFSBIGFH
);
2750 np
->n_fhp
= &np
->n_fh
;
2751 } else if (np
->n_fhsize
<= NFS_SMALLFH
&& fhlen
>NFS_SMALLFH
)
2752 np
->n_fhp
=(nfsfh_t
*)kmalloc(fhlen
,M_NFSBIGFH
,M_WAITOK
);
2753 bcopy((caddr_t
)nfhp
, (caddr_t
)np
->n_fhp
, fhlen
);
2754 np
->n_fhsize
= fhlen
;
2756 } else if (NFS_CMPFH(dnp
, nfhp
, fhlen
)) {
2760 error
= nfs_nget(dvp
->v_mount
, nfhp
, fhlen
, &np
);
2768 nfsm_postop_attr(newvp
, attrflag
, NFS_LATTR_NOSHRINK
);
2769 if (!attrflag
&& *npp
== NULL
) {
2778 nfsm_loadattr(newvp
, NULL
);
2782 if (npp
&& *npp
== NULL
) {
2797 * Nfs Version 3 commit rpc
2800 nfs_commit(struct vnode
*vp
, u_quad_t offset
, int cnt
, struct thread
*td
)
2805 struct nfsmount
*nmp
= VFSTONFS(vp
->v_mount
);
2806 caddr_t bpos
, dpos
, cp2
;
2807 int error
= 0, wccflag
= NFSV3_WCCRATTR
;
2808 struct mbuf
*mreq
, *mrep
, *md
, *mb
, *mb2
;
2810 if ((nmp
->nm_state
& NFSSTA_HASWRITEVERF
) == 0)
2812 nfsstats
.rpccnt
[NFSPROC_COMMIT
]++;
2813 nfsm_reqhead(vp
, NFSPROC_COMMIT
, NFSX_FH(1));
2815 nfsm_build(tl
, u_int32_t
*, 3 * NFSX_UNSIGNED
);
2816 txdr_hyper(offset
, tl
);
2818 *tl
= txdr_unsigned(cnt
);
2819 nfsm_request(vp
, NFSPROC_COMMIT
, td
, nfs_vpcred(vp
, ND_WRITE
));
2820 nfsm_wcc_data(vp
, wccflag
);
2822 nfsm_dissect(tl
, u_int32_t
*, NFSX_V3WRITEVERF
);
2823 if (bcmp((caddr_t
)nmp
->nm_verf
, (caddr_t
)tl
,
2824 NFSX_V3WRITEVERF
)) {
2825 bcopy((caddr_t
)tl
, (caddr_t
)nmp
->nm_verf
,
2827 error
= NFSERR_STALEWRITEVERF
;
2837 * - make nfs_bmap() essentially a no-op that does no translation
2838 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
2839 * (Maybe I could use the process's page mapping, but I was concerned that
2840 * Kernel Write might not be enabled and also figured copyout() would do
2841 * a lot more work than bcopy() and also it currently happens in the
2842 * context of the swapper process (2).
2844 * nfs_bmap(struct vnode *a_vp, off_t a_loffset,
2845 * off_t *a_doffsetp, int *a_runp, int *a_runb)
2848 nfs_bmap(struct vop_bmap_args
*ap
)
2850 if (ap
->a_doffsetp
!= NULL
)
2851 *ap
->a_doffsetp
= ap
->a_loffset
;
2852 if (ap
->a_runp
!= NULL
)
2854 if (ap
->a_runb
!= NULL
)
2862 * For async requests when nfsiod(s) are running, queue the request by
2863 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the
2867 nfs_strategy(struct vop_strategy_args
*ap
)
2869 struct bio
*bio
= ap
->a_bio
;
2871 struct buf
*bp
= bio
->bio_buf
;
2875 KASSERT(bp
->b_cmd
!= BUF_CMD_DONE
,
2876 ("nfs_strategy: buffer %p unexpectedly marked done", bp
));
2877 KASSERT(BUF_REFCNT(bp
) > 0,
2878 ("nfs_strategy: buffer %p not locked", bp
));
2880 if (bp
->b_flags
& B_ASYNC
)
2883 td
= curthread
; /* XXX */
2886 * We probably don't need to push an nbio any more since no
2887 * block conversion is required due to the use of 64 bit byte
2888 * offsets, but do it anyway.
2890 nbio
= push_bio(bio
);
2891 nbio
->bio_offset
= bio
->bio_offset
;
2894 * If the op is asynchronous and an i/o daemon is waiting
2895 * queue the request, wake it up and wait for completion
2896 * otherwise just do it ourselves.
2898 if ((bp
->b_flags
& B_ASYNC
) == 0 || nfs_asyncio(ap
->a_vp
, nbio
, td
))
2899 error
= nfs_doio(ap
->a_vp
, nbio
, td
);
2906 * NB Currently unsupported.
2908 * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred)
2912 nfs_mmap(struct vop_mmap_args
*ap
)
2918 * fsync vnode op. Just call nfs_flush() with commit == 1.
2920 * nfs_fsync(struct vnode *a_vp, int a_waitfor)
2924 nfs_fsync(struct vop_fsync_args
*ap
)
2926 return (nfs_flush(ap
->a_vp
, ap
->a_waitfor
, curthread
, 1));
2930 * Flush all the blocks associated with a vnode. Dirty NFS buffers may be
2931 * in one of two states: If B_NEEDCOMMIT is clear then the buffer contains
2932 * new NFS data which needs to be written to the server. If B_NEEDCOMMIT is
2933 * set the buffer contains data that has already been written to the server
2934 * and which now needs a commit RPC.
2936 * If commit is 0 we only take one pass and only flush buffers containing new
2939 * If commit is 1 we take two passes, issuing a commit RPC in the second
2942 * If waitfor is MNT_WAIT and commit is 1, we loop as many times as required
2943 * to completely flush all pending data.
2945 * Note that the RB_SCAN code properly handles the case where the
2946 * callback might block and directly or indirectly (another thread) cause
2947 * the RB tree to change.
2950 #ifndef NFS_COMMITBVECSIZ
2951 #define NFS_COMMITBVECSIZ 16
2954 struct nfs_flush_info
{
2955 enum { NFI_FLUSHNEW
, NFI_COMMIT
} mode
;
2962 struct buf
*bvary
[NFS_COMMITBVECSIZ
];
2968 static int nfs_flush_bp(struct buf
*bp
, void *data
);
2969 static int nfs_flush_docommit(struct nfs_flush_info
*info
, int error
);
2972 nfs_flush(struct vnode
*vp
, int waitfor
, struct thread
*td
, int commit
)
2974 struct nfsnode
*np
= VTONFS(vp
);
2975 struct nfsmount
*nmp
= VFSTONFS(vp
->v_mount
);
2976 struct nfs_flush_info info
;
2979 bzero(&info
, sizeof(info
));
2982 info
.waitfor
= waitfor
;
2983 info
.slpflag
= (nmp
->nm_flag
& NFSMNT_INT
) ? PCATCH
: 0;
2990 info
.mode
= NFI_FLUSHNEW
;
2991 error
= RB_SCAN(buf_rb_tree
, &vp
->v_rbdirty_tree
, NULL
,
2992 nfs_flush_bp
, &info
);
2995 * Take a second pass if committing and no error occured.
2996 * Clean up any left over collection (whether an error
2999 if (commit
&& error
== 0) {
3000 info
.mode
= NFI_COMMIT
;
3001 error
= RB_SCAN(buf_rb_tree
, &vp
->v_rbdirty_tree
, NULL
,
3002 nfs_flush_bp
, &info
);
3004 error
= nfs_flush_docommit(&info
, error
);
3008 * Wait for pending I/O to complete before checking whether
3009 * any further dirty buffers exist.
3011 while (waitfor
== MNT_WAIT
&& vp
->v_track_write
.bk_active
) {
3012 vp
->v_track_write
.bk_waitflag
= 1;
3013 error
= tsleep(&vp
->v_track_write
,
3014 info
.slpflag
, "nfsfsync", info
.slptimeo
);
3017 * We have to be able to break out if this
3018 * is an 'intr' mount.
3020 if (nfs_sigintr(nmp
, NULL
, td
)) {
3026 * Since we do not process pending signals,
3027 * once we get a PCATCH our tsleep() will no
3028 * longer sleep, switch to a fixed timeout
3031 if (info
.slpflag
== PCATCH
) {
3033 info
.slptimeo
= 2 * hz
;
3040 * Loop if we are flushing synchronous as well as committing,
3041 * and dirty buffers are still present. Otherwise we might livelock.
3043 } while (waitfor
== MNT_WAIT
&& commit
&&
3044 error
== 0 && !RB_EMPTY(&vp
->v_rbdirty_tree
));
3047 * The callbacks have to return a negative error to terminate the
3054 * Deal with any error collection
3056 if (np
->n_flag
& NWRITEERR
) {
3057 error
= np
->n_error
;
3058 np
->n_flag
&= ~NWRITEERR
;
3066 nfs_flush_bp(struct buf
*bp
, void *data
)
3068 struct nfs_flush_info
*info
= data
;
3073 switch(info
->mode
) {
3076 if (info
->loops
&& info
->waitfor
== MNT_WAIT
) {
3077 error
= BUF_LOCK(bp
, LK_EXCLUSIVE
| LK_NOWAIT
);
3079 int lkflags
= LK_EXCLUSIVE
| LK_SLEEPFAIL
;
3080 if (info
->slpflag
& PCATCH
)
3081 lkflags
|= LK_PCATCH
;
3082 error
= BUF_TIMELOCK(bp
, lkflags
, "nfsfsync",
3086 error
= BUF_LOCK(bp
, LK_EXCLUSIVE
| LK_NOWAIT
);
3089 KKASSERT(bp
->b_vp
== info
->vp
);
3091 if ((bp
->b_flags
& B_DELWRI
) == 0)
3092 panic("nfs_fsync: not dirty");
3093 if (bp
->b_flags
& B_NEEDCOMMIT
) {
3109 * Only process buffers in need of a commit which we can
3110 * immediately lock. This may prevent a buffer from being
3111 * committed, but the normal flush loop will block on the
3112 * same buffer so we shouldn't get into an endless loop.
3115 if ((bp
->b_flags
& (B_DELWRI
| B_NEEDCOMMIT
)) !=
3116 (B_DELWRI
| B_NEEDCOMMIT
) ||
3117 BUF_LOCK(bp
, LK_EXCLUSIVE
| LK_NOWAIT
) != 0) {
3122 KKASSERT(bp
->b_vp
== info
->vp
);
3126 * NOTE: storing the bp in the bvary[] basically sets
3127 * it up for a commit operation.
3129 * We must call vfs_busy_pages() now so the commit operation
3130 * is interlocked with user modifications to memory mapped
3133 * Note: to avoid loopback deadlocks, we do not
3134 * assign b_runningbufspace.
3136 bp
->b_cmd
= BUF_CMD_WRITE
;
3137 vfs_busy_pages(bp
->b_vp
, bp
);
3138 info
->bvary
[info
->bvsize
] = bp
;
3139 toff
= bp
->b_bio2
.bio_offset
+ bp
->b_dirtyoff
;
3140 if (info
->bvsize
== 0 || toff
< info
->beg_off
)
3141 info
->beg_off
= toff
;
3142 toff
+= (off_t
)(bp
->b_dirtyend
- bp
->b_dirtyoff
);
3143 if (info
->bvsize
== 0 || toff
> info
->end_off
)
3144 info
->end_off
= toff
;
3146 if (info
->bvsize
== NFS_COMMITBVECSIZ
) {
3147 error
= nfs_flush_docommit(info
, 0);
3148 KKASSERT(info
->bvsize
== 0);
3157 nfs_flush_docommit(struct nfs_flush_info
*info
, int error
)
3167 if (info
->bvsize
> 0) {
3169 * Commit data on the server, as required. Note that
3170 * nfs_commit will use the vnode's cred for the commit.
3171 * The NFSv3 commit RPC is limited to a 32 bit byte count.
3173 bytes
= info
->end_off
- info
->beg_off
;
3174 if (bytes
> 0x40000000)
3179 retv
= nfs_commit(vp
, info
->beg_off
,
3180 (int)bytes
, info
->td
);
3181 if (retv
== NFSERR_STALEWRITEVERF
)
3182 nfs_clearcommit(vp
->v_mount
);
3186 * Now, either mark the blocks I/O done or mark the
3187 * blocks dirty, depending on whether the commit
3190 for (i
= 0; i
< info
->bvsize
; ++i
) {
3191 bp
= info
->bvary
[i
];
3192 bp
->b_flags
&= ~(B_NEEDCOMMIT
| B_CLUSTEROK
);
3195 * Error, leave B_DELWRI intact
3197 vfs_unbusy_pages(bp
);
3198 bp
->b_cmd
= BUF_CMD_DONE
;
3202 * Success, remove B_DELWRI ( bundirty() ).
3204 * b_dirtyoff/b_dirtyend seem to be NFS
3205 * specific. We should probably move that
3206 * into bundirty(). XXX
3208 * We are faking an I/O write, we have to
3209 * start the transaction in order to
3210 * immediately biodone() it.
3213 bp
->b_flags
|= B_ASYNC
;
3215 bp
->b_flags
&= ~B_ERROR
;
3216 bp
->b_dirtyoff
= bp
->b_dirtyend
= 0;
3218 biodone(&bp
->b_bio1
);
3227 * NFS advisory byte-level locks.
3228 * Currently unsupported.
3230 * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl,
3234 nfs_advlock(struct vop_advlock_args
*ap
)
3236 struct nfsnode
*np
= VTONFS(ap
->a_vp
);
3239 * The following kludge is to allow diskless support to work
3240 * until a real NFS lockd is implemented. Basically, just pretend
3241 * that this is a local lock.
3243 return (lf_advlock(ap
, &(np
->n_lockf
), np
->n_size
));
3247 * Print out the contents of an nfsnode.
3249 * nfs_print(struct vnode *a_vp)
3252 nfs_print(struct vop_print_args
*ap
)
3254 struct vnode
*vp
= ap
->a_vp
;
3255 struct nfsnode
*np
= VTONFS(vp
);
3257 kprintf("tag VT_NFS, fileid %lld fsid 0x%x",
3258 (long long)np
->n_vattr
.va_fileid
, np
->n_vattr
.va_fsid
);
3259 if (vp
->v_type
== VFIFO
)
3266 * nfs special file access vnode op.
3267 * Essentially just get vattr and then imitate iaccess() since the device is
3268 * local to the client.
3270 * nfsspec_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
3273 nfsspec_access(struct vop_access_args
*ap
)
3277 struct ucred
*cred
= ap
->a_cred
;
3278 struct vnode
*vp
= ap
->a_vp
;
3279 mode_t mode
= ap
->a_mode
;
3285 * Disallow write attempts on filesystems mounted read-only;
3286 * unless the file is a socket, fifo, or a block or character
3287 * device resident on the filesystem.
3289 if ((mode
& VWRITE
) && (vp
->v_mount
->mnt_flag
& MNT_RDONLY
)) {
3290 switch (vp
->v_type
) {
3300 * If you're the super-user,
3301 * you always get access.
3303 if (cred
->cr_uid
== 0)
3306 error
= VOP_GETATTR(vp
, vap
);
3310 * Access check is based on only one of owner, group, public.
3311 * If not owner, then check group. If not a member of the
3312 * group, then check public access.
3314 if (cred
->cr_uid
!= vap
->va_uid
) {
3316 gp
= cred
->cr_groups
;
3317 for (i
= 0; i
< cred
->cr_ngroups
; i
++, gp
++)
3318 if (vap
->va_gid
== *gp
)
3324 error
= (vap
->va_mode
& mode
) == mode
? 0 : EACCES
;
3329 * Read wrapper for special devices.
3331 * nfsspec_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3332 * struct ucred *a_cred)
3335 nfsspec_read(struct vop_read_args
*ap
)
3337 struct nfsnode
*np
= VTONFS(ap
->a_vp
);
3343 getnanotime(&np
->n_atim
);
3344 return (VOCALL(&spec_vnode_vops
, &ap
->a_head
));
3348 * Write wrapper for special devices.
3350 * nfsspec_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3351 * struct ucred *a_cred)
3354 nfsspec_write(struct vop_write_args
*ap
)
3356 struct nfsnode
*np
= VTONFS(ap
->a_vp
);
3362 getnanotime(&np
->n_mtim
);
3363 return (VOCALL(&spec_vnode_vops
, &ap
->a_head
));
3367 * Close wrapper for special devices.
3369 * Update the times on the nfsnode then do device close.
3371 * nfsspec_close(struct vnode *a_vp, int a_fflag)
3374 nfsspec_close(struct vop_close_args
*ap
)
3376 struct vnode
*vp
= ap
->a_vp
;
3377 struct nfsnode
*np
= VTONFS(vp
);
3380 if (np
->n_flag
& (NACC
| NUPD
)) {
3382 if (vp
->v_sysref
.refcnt
== 1 &&
3383 (vp
->v_mount
->mnt_flag
& MNT_RDONLY
) == 0) {
3385 if (np
->n_flag
& NACC
)
3386 vattr
.va_atime
= np
->n_atim
;
3387 if (np
->n_flag
& NUPD
)
3388 vattr
.va_mtime
= np
->n_mtim
;
3389 (void)VOP_SETATTR(vp
, &vattr
, nfs_vpcred(vp
, ND_WRITE
));
3392 return (VOCALL(&spec_vnode_vops
, &ap
->a_head
));
3396 * Read wrapper for fifos.
3398 * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3399 * struct ucred *a_cred)
3402 nfsfifo_read(struct vop_read_args
*ap
)
3404 struct nfsnode
*np
= VTONFS(ap
->a_vp
);
3410 getnanotime(&np
->n_atim
);
3411 return (VOCALL(&fifo_vnode_vops
, &ap
->a_head
));
3415 * Write wrapper for fifos.
3417 * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3418 * struct ucred *a_cred)
3421 nfsfifo_write(struct vop_write_args
*ap
)
3423 struct nfsnode
*np
= VTONFS(ap
->a_vp
);
3429 getnanotime(&np
->n_mtim
);
3430 return (VOCALL(&fifo_vnode_vops
, &ap
->a_head
));
3434 * Close wrapper for fifos.
3436 * Update the times on the nfsnode then do fifo close.
3438 * nfsfifo_close(struct vnode *a_vp, int a_fflag)
3441 nfsfifo_close(struct vop_close_args
*ap
)
3443 struct vnode
*vp
= ap
->a_vp
;
3444 struct nfsnode
*np
= VTONFS(vp
);
3448 if (np
->n_flag
& (NACC
| NUPD
)) {
3450 if (np
->n_flag
& NACC
)
3452 if (np
->n_flag
& NUPD
)
3455 if (vp
->v_sysref
.refcnt
== 1 &&
3456 (vp
->v_mount
->mnt_flag
& MNT_RDONLY
) == 0) {
3458 if (np
->n_flag
& NACC
)
3459 vattr
.va_atime
= np
->n_atim
;
3460 if (np
->n_flag
& NUPD
)
3461 vattr
.va_mtime
= np
->n_mtim
;
3462 (void)VOP_SETATTR(vp
, &vattr
, nfs_vpcred(vp
, ND_WRITE
));
3465 return (VOCALL(&fifo_vnode_vops
, &ap
->a_head
));