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 1.34 2004/10/07 10:03:03 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/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>
69 #include <vm/vm_zone.h>
73 #include <vfs/fifofs/fifo.h>
81 #include "nfsm_subs.h"
85 #include <netinet/in.h>
86 #include <netinet/in_var.h>
93 * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these
94 * calls are not in getblk() and brelse() so that they would not be necessary
98 #define vfs_busy_pages(bp, f)
101 static int nfsspec_read (struct vop_read_args *);
102 static int nfsspec_write (struct vop_write_args *);
103 static int nfsfifo_read (struct vop_read_args *);
104 static int nfsfifo_write (struct vop_write_args *);
105 static int nfsspec_close (struct vop_close_args *);
106 static int nfsfifo_close (struct vop_close_args *);
107 #define nfs_poll vop_nopoll
108 static int nfs_flush (struct vnode *,int,struct thread *,int);
109 static int nfs_setattrrpc (struct vnode *,struct vattr *,struct ucred *,struct thread *);
110 static int nfs_lookup (struct vop_lookup_args *);
111 static int nfs_create (struct vop_create_args *);
112 static int nfs_mknod (struct vop_mknod_args *);
113 static int nfs_open (struct vop_open_args *);
114 static int nfs_close (struct vop_close_args *);
115 static int nfs_access (struct vop_access_args *);
116 static int nfs_getattr (struct vop_getattr_args *);
117 static int nfs_setattr (struct vop_setattr_args *);
118 static int nfs_read (struct vop_read_args *);
119 static int nfs_mmap (struct vop_mmap_args *);
120 static int nfs_fsync (struct vop_fsync_args *);
121 static int nfs_remove (struct vop_remove_args *);
122 static int nfs_link (struct vop_link_args *);
123 static int nfs_rename (struct vop_rename_args *);
124 static int nfs_mkdir (struct vop_mkdir_args *);
125 static int nfs_rmdir (struct vop_rmdir_args *);
126 static int nfs_symlink (struct vop_symlink_args *);
127 static int nfs_readdir (struct vop_readdir_args *);
128 static int nfs_bmap (struct vop_bmap_args *);
129 static int nfs_strategy (struct vop_strategy_args *);
130 static int nfs_lookitup (struct vnode *, const char *, int,
131 struct ucred *, struct thread *, struct nfsnode **);
132 static int nfs_sillyrename (struct vnode *,struct vnode *,struct componentname *);
133 static int nfsspec_access (struct vop_access_args *);
134 static int nfs_readlink (struct vop_readlink_args *);
135 static int nfs_print (struct vop_print_args *);
136 static int nfs_advlock (struct vop_advlock_args *);
137 static int nfs_bwrite (struct vop_bwrite_args *);
139 * Global vfs data structures for nfs
141 struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = {
142 { &vop_default_desc, vop_defaultop },
143 { &vop_access_desc, (void *) nfs_access },
144 { &vop_advlock_desc, (void *) nfs_advlock },
145 { &vop_bmap_desc, (void *) nfs_bmap },
146 { &vop_bwrite_desc, (void *) nfs_bwrite },
147 { &vop_close_desc, (void *) nfs_close },
148 { &vop_create_desc, (void *) nfs_create },
149 { &vop_fsync_desc, (void *) nfs_fsync },
150 { &vop_getattr_desc, (void *) nfs_getattr },
151 { &vop_getpages_desc, (void *) nfs_getpages },
152 { &vop_putpages_desc, (void *) nfs_putpages },
153 { &vop_inactive_desc, (void *) nfs_inactive },
154 { &vop_islocked_desc, (void *) vop_stdislocked },
155 { &vop_lease_desc, vop_null },
156 { &vop_link_desc, (void *) nfs_link },
157 { &vop_lock_desc, (void *) vop_stdlock },
158 { &vop_lookup_desc, (void *) nfs_lookup },
159 { &vop_mkdir_desc, (void *) nfs_mkdir },
160 { &vop_mknod_desc, (void *) nfs_mknod },
161 { &vop_mmap_desc, (void *) nfs_mmap },
162 { &vop_open_desc, (void *) nfs_open },
163 { &vop_poll_desc, (void *) nfs_poll },
164 { &vop_print_desc, (void *) nfs_print },
165 { &vop_read_desc, (void *) nfs_read },
166 { &vop_readdir_desc, (void *) nfs_readdir },
167 { &vop_readlink_desc, (void *) nfs_readlink },
168 { &vop_reclaim_desc, (void *) nfs_reclaim },
169 { &vop_remove_desc, (void *) nfs_remove },
170 { &vop_rename_desc, (void *) nfs_rename },
171 { &vop_rmdir_desc, (void *) nfs_rmdir },
172 { &vop_setattr_desc, (void *) nfs_setattr },
173 { &vop_strategy_desc, (void *) nfs_strategy },
174 { &vop_symlink_desc, (void *) nfs_symlink },
175 { &vop_unlock_desc, (void *) vop_stdunlock },
176 { &vop_write_desc, (void *) nfs_write },
181 * Special device vnode ops
183 struct vnodeopv_entry_desc nfsv2_specop_entries[] = {
184 { &vop_default_desc, (void *) spec_vnoperate },
185 { &vop_access_desc, (void *) nfsspec_access },
186 { &vop_close_desc, (void *) nfsspec_close },
187 { &vop_fsync_desc, (void *) nfs_fsync },
188 { &vop_getattr_desc, (void *) nfs_getattr },
189 { &vop_inactive_desc, (void *) nfs_inactive },
190 { &vop_islocked_desc, (void *) vop_stdislocked },
191 { &vop_lock_desc, (void *) vop_stdlock },
192 { &vop_print_desc, (void *) nfs_print },
193 { &vop_read_desc, (void *) nfsspec_read },
194 { &vop_reclaim_desc, (void *) nfs_reclaim },
195 { &vop_setattr_desc, (void *) nfs_setattr },
196 { &vop_unlock_desc, (void *) vop_stdunlock },
197 { &vop_write_desc, (void *) nfsspec_write },
201 struct vnodeopv_entry_desc nfsv2_fifoop_entries[] = {
202 { &vop_default_desc, (void *) fifo_vnoperate },
203 { &vop_access_desc, (void *) nfsspec_access },
204 { &vop_close_desc, (void *) nfsfifo_close },
205 { &vop_fsync_desc, (void *) nfs_fsync },
206 { &vop_getattr_desc, (void *) nfs_getattr },
207 { &vop_inactive_desc, (void *) nfs_inactive },
208 { &vop_islocked_desc, (void *) vop_stdislocked },
209 { &vop_lock_desc, (void *) vop_stdlock },
210 { &vop_print_desc, (void *) nfs_print },
211 { &vop_read_desc, (void *) nfsfifo_read },
212 { &vop_reclaim_desc, (void *) nfs_reclaim },
213 { &vop_setattr_desc, (void *) nfs_setattr },
214 { &vop_unlock_desc, (void *) vop_stdunlock },
215 { &vop_write_desc, (void *) nfsfifo_write },
219 static int nfs_mknodrpc (struct vnode *dvp, struct vnode **vpp,
220 struct componentname *cnp,
222 static int nfs_removerpc (struct vnode *dvp, const char *name,
224 struct ucred *cred, struct thread *td);
225 static int nfs_renamerpc (struct vnode *fdvp, const char *fnameptr,
226 int fnamelen, struct vnode *tdvp,
227 const char *tnameptr, int tnamelen,
228 struct ucred *cred, struct thread *td);
229 static int nfs_renameit (struct vnode *sdvp,
230 struct componentname *scnp,
231 struct sillyrename *sp);
236 extern u_int32_t nfs_true, nfs_false;
237 extern u_int32_t nfs_xdrneg1;
238 extern struct nfsstats nfsstats;
239 extern nfstype nfsv3_type[9];
240 struct thread *nfs_iodwant[NFS_MAXASYNCDAEMON];
241 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON];
242 int nfs_numasync = 0;
243 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1))
245 SYSCTL_DECL(_vfs_nfs);
247 static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
248 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
249 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
251 static int nfsneg_cache_timeout = NFS_MINATTRTIMO;
252 SYSCTL_INT(_vfs_nfs, OID_AUTO, neg_cache_timeout, CTLFLAG_RW,
253 &nfsneg_cache_timeout, 0, "NFS NEGATIVE ACCESS cache timeout");
255 static int nfsv3_commit_on_close = 0;
256 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
257 &nfsv3_commit_on_close, 0, "write+commit on close, else only write");
259 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
260 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
262 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
263 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
266 #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \
267 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \
268 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP)
270 nfs3_access_otw(struct vnode *vp, int wmode,
271 struct thread *td, struct ucred *cred)
275 int error = 0, attrflag;
277 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
278 caddr_t bpos, dpos, cp2;
282 struct nfsnode *np = VTONFS(vp);
284 nfsstats.rpccnt[NFSPROC_ACCESS]++;
285 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED);
287 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
288 *tl = txdr_unsigned(wmode);
289 nfsm_request(vp, NFSPROC_ACCESS, td, cred);
290 nfsm_postop_attr(vp, attrflag);
292 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
293 rmode = fxdr_unsigned(u_int32_t, *tl);
295 np->n_modeuid = cred->cr_uid;
296 np->n_modestamp = mycpu->gd_time_seconds;
304 * nfs access vnode op.
305 * For nfs version 2, just return ok. File accesses may fail later.
306 * For nfs version 3, use the access rpc to check accessibility. If file modes
307 * are changed on the server, accesses might still fail later.
309 * nfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
310 * struct thread *a_td)
313 nfs_access(struct vop_access_args *ap)
315 struct vnode *vp = ap->a_vp;
317 u_int32_t mode, wmode;
318 int v3 = NFS_ISV3(vp);
319 struct nfsnode *np = VTONFS(vp);
322 * Disallow write attempts on filesystems mounted read-only;
323 * unless the file is a socket, fifo, or a block or character
324 * device resident on the filesystem.
326 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
327 switch (vp->v_type) {
337 * For nfs v3, check to see if we have done this recently, and if
338 * so return our cached result instead of making an ACCESS call.
339 * If not, do an access rpc, otherwise you are stuck emulating
340 * ufs_access() locally using the vattr. This may not be correct,
341 * since the server may apply other access criteria such as
342 * client uid-->server uid mapping that we do not know about.
345 if (ap->a_mode & VREAD)
346 mode = NFSV3ACCESS_READ;
349 if (vp->v_type != VDIR) {
350 if (ap->a_mode & VWRITE)
351 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
352 if (ap->a_mode & VEXEC)
353 mode |= NFSV3ACCESS_EXECUTE;
355 if (ap->a_mode & VWRITE)
356 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
358 if (ap->a_mode & VEXEC)
359 mode |= NFSV3ACCESS_LOOKUP;
361 /* XXX safety belt, only make blanket request if caching */
362 if (nfsaccess_cache_timeout > 0) {
363 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY |
364 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE |
365 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP;
371 * Does our cached result allow us to give a definite yes to
374 if ((mycpu->gd_time_seconds < (np->n_modestamp + nfsaccess_cache_timeout)) &&
375 (ap->a_cred->cr_uid == np->n_modeuid) &&
376 ((np->n_mode & mode) == mode)) {
377 nfsstats.accesscache_hits++;
380 * Either a no, or a don't know. Go to the wire.
382 nfsstats.accesscache_misses++;
383 error = nfs3_access_otw(vp, wmode, ap->a_td,ap->a_cred);
385 if ((np->n_mode & mode) != mode) {
391 if ((error = nfsspec_access(ap)) != 0)
395 * Attempt to prevent a mapped root from accessing a file
396 * which it shouldn't. We try to read a byte from the file
397 * if the user is root and the file is not zero length.
398 * After calling nfsspec_access, we should have the correct
401 if (ap->a_cred->cr_uid == 0 && (ap->a_mode & VREAD)
402 && VTONFS(vp)->n_size > 0) {
409 auio.uio_iov = &aiov;
413 auio.uio_segflg = UIO_SYSSPACE;
414 auio.uio_rw = UIO_READ;
415 auio.uio_td = ap->a_td;
417 if (vp->v_type == VREG) {
418 error = nfs_readrpc(vp, &auio);
419 } else if (vp->v_type == VDIR) {
421 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
423 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
424 error = nfs_readdirrpc(vp, &auio);
426 } else if (vp->v_type == VLNK) {
427 error = nfs_readlinkrpc(vp, &auio);
434 * [re]record creds for reading and/or writing if access
435 * was granted. Assume the NFS server will grant read access
436 * for execute requests.
439 if ((ap->a_mode & (VREAD|VEXEC)) && ap->a_cred != np->n_rucred) {
442 crfree(np->n_rucred);
443 np->n_rucred = ap->a_cred;
445 if ((ap->a_mode & VWRITE) && ap->a_cred != np->n_wucred) {
448 crfree(np->n_wucred);
449 np->n_wucred = ap->a_cred;
457 * Check to see if the type is ok
458 * and that deletion is not in progress.
459 * For paged in text files, you will need to flush the page cache
460 * if consistency is lost.
462 * nfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
463 * struct thread *a_td)
467 nfs_open(struct vop_open_args *ap)
469 struct vnode *vp = ap->a_vp;
470 struct nfsnode *np = VTONFS(vp);
471 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
475 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
477 printf("open eacces vtyp=%d\n",vp->v_type);
482 * Get a valid lease. If cached data is stale, flush it.
484 if (nmp->nm_flag & NFSMNT_NQNFS) {
485 if (NQNFS_CKINVALID(vp, np, ND_READ)) {
487 error = nqnfs_getlease(vp, ND_READ, ap->a_td);
488 } while (error == NQNFS_EXPIRED);
491 if (np->n_lrev != np->n_brev ||
492 (np->n_flag & NQNFSNONCACHE)) {
493 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1))
497 np->n_brev = np->n_lrev;
501 if (np->n_flag & NMODIFIED) {
502 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1))
507 if (vp->v_type == VDIR)
508 np->n_direofoffset = 0;
509 error = VOP_GETATTR(vp, &vattr, ap->a_td);
512 np->n_mtime = vattr.va_mtime.tv_sec;
514 error = VOP_GETATTR(vp, &vattr, ap->a_td);
517 if (np->n_mtime != vattr.va_mtime.tv_sec) {
518 if (vp->v_type == VDIR)
519 np->n_direofoffset = 0;
520 if ((error = nfs_vinvalbuf(vp, V_SAVE,
521 ap->a_td, 1)) == EINTR) {
524 np->n_mtime = vattr.va_mtime.tv_sec;
528 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0)
529 np->n_attrstamp = 0; /* For Open/Close consistency */
535 * What an NFS client should do upon close after writing is a debatable issue.
536 * Most NFS clients push delayed writes to the server upon close, basically for
538 * 1 - So that any write errors may be reported back to the client process
539 * doing the close system call. By far the two most likely errors are
540 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
541 * 2 - To put a worst case upper bound on cache inconsistency between
542 * multiple clients for the file.
543 * There is also a consistency problem for Version 2 of the protocol w.r.t.
544 * not being able to tell if other clients are writing a file concurrently,
545 * since there is no way of knowing if the changed modify time in the reply
546 * is only due to the write for this client.
547 * (NFS Version 3 provides weak cache consistency data in the reply that
548 * should be sufficient to detect and handle this case.)
550 * The current code does the following:
551 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
552 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
553 * or commit them (this satisfies 1 and 2 except for the
554 * case where the server crashes after this close but
555 * before the commit RPC, which is felt to be "good
556 * enough". Changing the last argument to nfs_flush() to
557 * a 1 would force a commit operation, if it is felt a
558 * commit is necessary now.
559 * for NQNFS - do nothing now, since 2 is dealt with via leases and
560 * 1 should be dealt with via an fsync() system call for
561 * cases where write errors are important.
563 * nfs_close(struct vnodeop_desc *a_desc, struct vnode *a_vp, int a_fflag,
564 * struct ucred *a_cred, struct thread *a_td)
568 nfs_close(struct vop_close_args *ap)
570 struct vnode *vp = ap->a_vp;
571 struct nfsnode *np = VTONFS(vp);
574 if (vp->v_type == VREG) {
575 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 &&
576 (np->n_flag & NMODIFIED)) {
579 * Under NFSv3 we have dirty buffers to dispose of. We
580 * must flush them to the NFS server. We have the option
581 * of waiting all the way through the commit rpc or just
582 * waiting for the initial write. The default is to only
583 * wait through the initial write so the data is in the
584 * server's cache, which is roughly similar to the state
585 * a standard disk subsystem leaves the file in on close().
587 * We cannot clear the NMODIFIED bit in np->n_flag due to
588 * potential races with other processes, and certainly
589 * cannot clear it if we don't commit.
591 int cm = nfsv3_commit_on_close ? 1 : 0;
592 error = nfs_flush(vp, MNT_WAIT, ap->a_td, cm);
593 /* np->n_flag &= ~NMODIFIED; */
595 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
599 if (np->n_flag & NWRITEERR) {
600 np->n_flag &= ~NWRITEERR;
608 * nfs getattr call from vfs.
610 * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred,
611 * struct thread *a_td)
614 nfs_getattr(struct vop_getattr_args *ap)
616 struct vnode *vp = ap->a_vp;
617 struct nfsnode *np = VTONFS(vp);
623 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
624 int v3 = NFS_ISV3(vp);
627 * Update local times for special files.
629 if (np->n_flag & (NACC | NUPD))
632 * First look in the cache.
634 if (nfs_getattrcache(vp, ap->a_vap) == 0)
637 if (v3 && nfsaccess_cache_timeout > 0) {
638 nfsstats.accesscache_misses++;
639 nfs3_access_otw(vp, NFSV3ACCESS_ALL, ap->a_td, nfs_vpcred(vp, ND_CHECK));
640 if (nfs_getattrcache(vp, ap->a_vap) == 0)
644 nfsstats.rpccnt[NFSPROC_GETATTR]++;
645 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3));
647 nfsm_request(vp, NFSPROC_GETATTR, ap->a_td, nfs_vpcred(vp, ND_CHECK));
649 nfsm_loadattr(vp, ap->a_vap);
659 * nfs_setattr(struct vnodeop_desc *a_desc, struct vnode *a_vp,
660 * struct vattr *a_vap, struct ucred *a_cred,
661 * struct thread *a_td)
664 nfs_setattr(struct vop_setattr_args *ap)
666 struct vnode *vp = ap->a_vp;
667 struct nfsnode *np = VTONFS(vp);
668 struct vattr *vap = ap->a_vap;
677 * Setting of flags is not supported.
679 if (vap->va_flags != VNOVAL)
683 * Disallow write attempts if the filesystem is mounted read-only.
685 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
686 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
687 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
688 (vp->v_mount->mnt_flag & MNT_RDONLY))
690 if (vap->va_size != VNOVAL) {
691 switch (vp->v_type) {
698 if (vap->va_mtime.tv_sec == VNOVAL &&
699 vap->va_atime.tv_sec == VNOVAL &&
700 vap->va_mode == (mode_t)VNOVAL &&
701 vap->va_uid == (uid_t)VNOVAL &&
702 vap->va_gid == (gid_t)VNOVAL)
704 vap->va_size = VNOVAL;
708 * Disallow write attempts if the filesystem is
711 if (vp->v_mount->mnt_flag & MNT_RDONLY)
715 * We run vnode_pager_setsize() early (why?),
716 * we must set np->n_size now to avoid vinvalbuf
717 * V_SAVE races that might setsize a lower
722 error = nfs_meta_setsize(vp, ap->a_td, vap->va_size);
724 if (np->n_flag & NMODIFIED) {
725 if (vap->va_size == 0)
726 error = nfs_vinvalbuf(vp, 0, ap->a_td, 1);
728 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
731 vnode_pager_setsize(vp, np->n_size);
736 * np->n_size has already been set to vap->va_size
737 * in nfs_meta_setsize(). We must set it again since
738 * nfs_loadattrcache() could be called through
739 * nfs_meta_setsize() and could modify np->n_size.
741 * (note that nfs_loadattrcache() will have called
742 * vnode_pager_setsize() for us in that case).
744 np->n_vattr.va_size = np->n_size = vap->va_size;
746 } else if ((vap->va_mtime.tv_sec != VNOVAL ||
747 vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) &&
748 vp->v_type == VREG &&
749 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_td, 1)) == EINTR)
751 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_td);
752 if (error && vap->va_size != VNOVAL) {
753 np->n_size = np->n_vattr.va_size = tsize;
754 vnode_pager_setsize(vp, np->n_size);
760 * Do an nfs setattr rpc.
763 nfs_setattrrpc(struct vnode *vp, struct vattr *vap,
764 struct ucred *cred, struct thread *td)
766 struct nfsv2_sattr *sp;
767 struct nfsnode *np = VTONFS(vp);
770 caddr_t bpos, dpos, cp2;
772 int error = 0, wccflag = NFSV3_WCCRATTR;
773 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
774 int v3 = NFS_ISV3(vp);
776 nfsstats.rpccnt[NFSPROC_SETATTR]++;
777 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3));
780 nfsm_v3attrbuild(vap, TRUE);
781 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
784 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
785 if (vap->va_mode == (mode_t)VNOVAL)
786 sp->sa_mode = nfs_xdrneg1;
788 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
789 if (vap->va_uid == (uid_t)VNOVAL)
790 sp->sa_uid = nfs_xdrneg1;
792 sp->sa_uid = txdr_unsigned(vap->va_uid);
793 if (vap->va_gid == (gid_t)VNOVAL)
794 sp->sa_gid = nfs_xdrneg1;
796 sp->sa_gid = txdr_unsigned(vap->va_gid);
797 sp->sa_size = txdr_unsigned(vap->va_size);
798 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
799 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
801 nfsm_request(vp, NFSPROC_SETATTR, td, cred);
804 nfsm_wcc_data(vp, wccflag);
806 nfsm_loadattr(vp, (struct vattr *)0);
813 * 'cached' nfs directory lookup
815 * nfs_lookup(struct vnodeop_desc *a_desc, struct vnode *a_dvp,
816 * struct vnode **a_vpp, struct componentname *a_cnp)
819 nfs_lookup(struct vop_lookup_args *ap)
821 struct componentname *cnp = ap->a_cnp;
822 struct vnode *dvp = ap->a_dvp;
823 struct vnode **vpp = ap->a_vpp;
824 int flags = cnp->cn_flags;
829 struct nfsmount *nmp;
830 caddr_t bpos, dpos, cp2;
831 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
835 int lockparent, wantparent, error = 0, attrflag, fhsize;
836 int v3 = NFS_ISV3(dvp);
837 struct thread *td = cnp->cn_td;
840 * Read-only mount check and directory check.
843 if ((flags & CNP_ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
844 (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME))
847 if (dvp->v_type != VDIR)
851 * Look it up in the cache. Note that ENOENT is only returned if we
852 * previously entered a negative hit (see later on). The additional
853 * nfsneg_cache_timeout check causes previously cached results to
854 * be instantly ignored if the negative caching is turned off.
856 lockparent = flags & CNP_LOCKPARENT;
857 wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT);
858 nmp = VFSTONFS(dvp->v_mount);
860 error = cache_lookup(dvp, vpp, cnp);
865 if (error == ENOENT) {
866 if (nfsneg_cache_timeout) {
873 printf("nfs_lookup: %*.*s weird error %d\n",
874 (int)cnp->cn_namelen, (int)cnp->cn_namelen,
875 cnp->cn_nameptr, error);
881 * At this point we have a cache hit (error should be -1).
882 * The vnode returned in *vpp will be referenced but not
885 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0) {
894 * See the comment starting `Step through' in ufs/ufs_lookup.c
895 * for an explanation of the locking protocol
898 /* newvp already ref'd from lookup */
900 } else if (flags & CNP_ISDOTDOT) {
901 VOP_UNLOCK(dvp, NULL, 0, td);
902 cnp->cn_flags |= CNP_PDIRUNLOCK;
903 error = vget(newvp, NULL, LK_EXCLUSIVE, td);
904 vrele(newvp); /* get rid of ref from lookup */
905 if (!error && lockparent && (flags & CNP_ISLASTCN)) {
906 error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td);
908 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
911 error = vget(newvp, NULL, LK_EXCLUSIVE, td);
912 vrele(newvp); /* get rid of ref from lookup */
913 if (!lockparent || error || !(flags & CNP_ISLASTCN)) {
914 VOP_UNLOCK(dvp, NULL, 0, td);
915 cnp->cn_flags |= CNP_PDIRUNLOCK;
920 * Attempt to do a better job synchronizing our cache
921 * to the NFS server by checking the vnode against
922 * the nfs-only cache via VOP_GETATTR().
924 * WARNING! An old ctime check has been removed. We
925 * can't just willy-nilly purge a directory vnode that
926 * might have children in the new VFS scheme. The
927 * ctime check was bogus anyway.
929 if (vpid == newvp->v_id) {
930 if (VOP_GETATTR(newvp, &vattr, td) == 0) {
931 nfsstats.lookupcache_hits++;
932 if (cnp->cn_nameiop != NAMEI_LOOKUP &&
933 (flags & CNP_ISLASTCN))
934 cnp->cn_flags |= CNP_SAVENAME;
940 if (lockparent && dvp != newvp && (flags & CNP_ISLASTCN)) {
941 VOP_UNLOCK(dvp, NULL, 0, td);
942 cnp->cn_flags |= CNP_PDIRUNLOCK;
945 error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td);
947 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
955 * Cache miss, go the wire.
959 nfsstats.lookupcache_misses++;
960 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
961 len = cnp->cn_namelen;
962 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
963 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
965 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
966 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_td, cnp->cn_cred);
969 * Cache negatve lookups to reduce NFS traffic, but use
972 if (error == ENOENT &&
973 (cnp->cn_flags & CNP_MAKEENTRY) &&
974 cnp->cn_nameiop == NAMEI_LOOKUP &&
975 nfsneg_cache_timeout) {
976 int toval = nfsneg_cache_timeout * hz;
977 if (cnp->cn_flags & CNP_CACHETIMEOUT) {
978 if (cnp->cn_timeout > toval)
979 cnp->cn_timeout = toval;
981 cnp->cn_flags |= CNP_CACHETIMEOUT;
982 cnp->cn_timeout = toval;
984 cache_enter(dvp, NULL, cnp);
986 nfsm_postop_attr(dvp, attrflag);
990 nfsm_getfh(fhp, fhsize, v3);
993 * Handle RENAME case...
995 if (cnp->cn_nameiop == NAMEI_RENAME && wantparent && (flags & CNP_ISLASTCN)) {
996 if (NFS_CMPFH(np, fhp, fhsize)) {
1000 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1007 nfsm_postop_attr(newvp, attrflag);
1008 nfsm_postop_attr(dvp, attrflag);
1010 nfsm_loadattr(newvp, (struct vattr *)0);
1013 cnp->cn_flags |= CNP_SAVENAME;
1015 VOP_UNLOCK(dvp, NULL, 0, td);
1016 cnp->cn_flags |= CNP_PDIRUNLOCK;
1021 if (flags & CNP_ISDOTDOT) {
1022 VOP_UNLOCK(dvp, NULL, 0, td);
1023 cnp->cn_flags |= CNP_PDIRUNLOCK;
1024 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1026 vn_lock(dvp, NULL, LK_EXCLUSIVE | LK_RETRY, td);
1027 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
1028 return (error); /* NOTE: return error from nget */
1031 if (lockparent && (flags & CNP_ISLASTCN)) {
1032 error = vn_lock(dvp, NULL, LK_EXCLUSIVE, td);
1037 cnp->cn_flags |= CNP_PDIRUNLOCK;
1039 } else if (NFS_CMPFH(np, fhp, fhsize)) {
1043 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1048 if (!lockparent || !(flags & CNP_ISLASTCN)) {
1049 VOP_UNLOCK(dvp, NULL, 0, td);
1050 cnp->cn_flags |= CNP_PDIRUNLOCK;
1055 nfsm_postop_attr(newvp, attrflag);
1056 nfsm_postop_attr(dvp, attrflag);
1058 nfsm_loadattr(newvp, (struct vattr *)0);
1059 if (cnp->cn_nameiop != NAMEI_LOOKUP && (flags & CNP_ISLASTCN))
1060 cnp->cn_flags |= CNP_SAVENAME;
1061 if ((cnp->cn_flags & CNP_MAKEENTRY) &&
1062 (cnp->cn_nameiop != NAMEI_DELETE || !(flags & CNP_ISLASTCN))) {
1063 np->n_ctime = np->n_vattr.va_ctime.tv_sec;
1064 cache_enter(dvp, newvp, cnp);
1070 if (newvp != NULLVP) {
1074 if ((cnp->cn_nameiop == NAMEI_CREATE || cnp->cn_nameiop == NAMEI_RENAME) &&
1075 (flags & CNP_ISLASTCN) && error == ENOENT) {
1077 VOP_UNLOCK(dvp, NULL, 0, td);
1078 cnp->cn_flags |= CNP_PDIRUNLOCK;
1080 if (dvp->v_mount->mnt_flag & MNT_RDONLY)
1083 error = EJUSTRETURN;
1085 if (cnp->cn_nameiop != NAMEI_LOOKUP && (flags & CNP_ISLASTCN))
1086 cnp->cn_flags |= CNP_SAVENAME;
1093 * Just call nfs_bioread() to do the work.
1095 * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1096 * struct ucred *a_cred)
1099 nfs_read(struct vop_read_args *ap)
1101 struct vnode *vp = ap->a_vp;
1103 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
1104 switch (vp->v_type) {
1106 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
1117 * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
1120 nfs_readlink(struct vop_readlink_args *ap)
1122 struct vnode *vp = ap->a_vp;
1124 if (vp->v_type != VLNK)
1126 return (nfs_bioread(vp, ap->a_uio, 0));
1130 * Do a readlink rpc.
1131 * Called by nfs_doio() from below the buffer cache.
1134 nfs_readlinkrpc(struct vnode *vp, struct uio *uiop)
1139 caddr_t bpos, dpos, cp2;
1140 int error = 0, len, attrflag;
1141 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1142 int v3 = NFS_ISV3(vp);
1144 nfsstats.rpccnt[NFSPROC_READLINK]++;
1145 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3));
1147 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_td, nfs_vpcred(vp, ND_CHECK));
1149 nfsm_postop_attr(vp, attrflag);
1151 nfsm_strsiz(len, NFS_MAXPATHLEN);
1152 if (len == NFS_MAXPATHLEN) {
1153 struct nfsnode *np = VTONFS(vp);
1154 if (np->n_size && np->n_size < NFS_MAXPATHLEN)
1157 nfsm_mtouio(uiop, len);
1169 nfs_readrpc(struct vnode *vp, struct uio *uiop)
1174 caddr_t bpos, dpos, cp2;
1175 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1176 struct nfsmount *nmp;
1177 int error = 0, len, retlen, tsiz, eof, attrflag;
1178 int v3 = NFS_ISV3(vp);
1183 nmp = VFSTONFS(vp->v_mount);
1184 tsiz = uiop->uio_resid;
1185 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1188 nfsstats.rpccnt[NFSPROC_READ]++;
1189 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
1190 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3);
1192 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3);
1194 txdr_hyper(uiop->uio_offset, tl);
1195 *(tl + 2) = txdr_unsigned(len);
1197 *tl++ = txdr_unsigned(uiop->uio_offset);
1198 *tl++ = txdr_unsigned(len);
1201 nfsm_request(vp, NFSPROC_READ, uiop->uio_td, nfs_vpcred(vp, ND_READ));
1203 nfsm_postop_attr(vp, attrflag);
1208 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1209 eof = fxdr_unsigned(int, *(tl + 1));
1211 nfsm_loadattr(vp, (struct vattr *)0);
1212 nfsm_strsiz(retlen, nmp->nm_rsize);
1213 nfsm_mtouio(uiop, retlen);
1217 if (eof || retlen == 0) {
1220 } else if (retlen < len) {
1232 nfs_writerpc(struct vnode *vp, struct uio *uiop, int *iomode, int *must_commit)
1236 int32_t t1, t2, backup;
1237 caddr_t bpos, dpos, cp2;
1238 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1239 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1240 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
1241 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC;
1244 if (uiop->uio_iovcnt != 1)
1245 panic("nfs: writerpc iovcnt > 1");
1248 tsiz = uiop->uio_resid;
1249 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1252 nfsstats.rpccnt[NFSPROC_WRITE]++;
1253 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1254 nfsm_reqhead(vp, NFSPROC_WRITE,
1255 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len));
1258 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
1259 txdr_hyper(uiop->uio_offset, tl);
1261 *tl++ = txdr_unsigned(len);
1262 *tl++ = txdr_unsigned(*iomode);
1263 *tl = txdr_unsigned(len);
1267 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1268 /* Set both "begin" and "current" to non-garbage. */
1269 x = txdr_unsigned((u_int32_t)uiop->uio_offset);
1270 *tl++ = x; /* "begin offset" */
1271 *tl++ = x; /* "current offset" */
1272 x = txdr_unsigned(len);
1273 *tl++ = x; /* total to this offset */
1274 *tl = x; /* size of this write */
1276 nfsm_uiotom(uiop, len);
1277 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_td, nfs_vpcred(vp, ND_WRITE));
1279 wccflag = NFSV3_WCCCHK;
1280 nfsm_wcc_data(vp, wccflag);
1282 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
1283 + NFSX_V3WRITEVERF);
1284 rlen = fxdr_unsigned(int, *tl++);
1289 } else if (rlen < len) {
1290 backup = len - rlen;
1291 uiop->uio_iov->iov_base -= backup;
1292 uiop->uio_iov->iov_len += backup;
1293 uiop->uio_offset -= backup;
1294 uiop->uio_resid += backup;
1297 commit = fxdr_unsigned(int, *tl++);
1300 * Return the lowest committment level
1301 * obtained by any of the RPCs.
1303 if (committed == NFSV3WRITE_FILESYNC)
1305 else if (committed == NFSV3WRITE_DATASYNC &&
1306 commit == NFSV3WRITE_UNSTABLE)
1308 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){
1309 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1311 nmp->nm_state |= NFSSTA_HASWRITEVERF;
1312 } else if (bcmp((caddr_t)tl,
1313 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1315 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1320 nfsm_loadattr(vp, (struct vattr *)0);
1322 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec;
1329 if (vp->v_mount->mnt_flag & MNT_ASYNC)
1330 committed = NFSV3WRITE_FILESYNC;
1331 *iomode = committed;
1333 uiop->uio_resid = tsiz;
1339 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1340 * mode set to specify the file type and the size field for rdev.
1343 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1346 struct nfsv2_sattr *sp;
1350 struct vnode *newvp = (struct vnode *)0;
1351 struct nfsnode *np = (struct nfsnode *)0;
1355 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
1356 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1358 int v3 = NFS_ISV3(dvp);
1360 if (vap->va_type == VCHR || vap->va_type == VBLK)
1361 rdev = txdr_unsigned(vap->va_rdev);
1362 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1365 return (EOPNOTSUPP);
1367 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) {
1370 nfsstats.rpccnt[NFSPROC_MKNOD]++;
1371 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED +
1372 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1373 nfsm_fhtom(dvp, v3);
1374 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1376 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1377 *tl++ = vtonfsv3_type(vap->va_type);
1378 nfsm_v3attrbuild(vap, FALSE);
1379 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1380 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1381 *tl++ = txdr_unsigned(umajor(vap->va_rdev));
1382 *tl = txdr_unsigned(uminor(vap->va_rdev));
1385 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1386 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1387 sp->sa_uid = nfs_xdrneg1;
1388 sp->sa_gid = nfs_xdrneg1;
1390 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1391 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1393 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_td, cnp->cn_cred);
1395 nfsm_mtofh(dvp, newvp, v3, gotvp);
1399 newvp = (struct vnode *)0;
1401 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1402 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1408 nfsm_wcc_data(dvp, wccflag);
1415 if (cnp->cn_flags & CNP_MAKEENTRY)
1416 cache_enter(dvp, newvp, cnp);
1419 VTONFS(dvp)->n_flag |= NMODIFIED;
1421 VTONFS(dvp)->n_attrstamp = 0;
1427 * just call nfs_mknodrpc() to do the work.
1429 * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
1430 * struct componentname *a_cnp, struct vattr *a_vap)
1434 nfs_mknod(struct vop_mknod_args *ap)
1436 return nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1439 static u_long create_verf;
1441 * nfs file create call
1443 * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
1444 * struct componentname *a_cnp, struct vattr *a_vap)
1447 nfs_create(struct vop_create_args *ap)
1449 struct vnode *dvp = ap->a_dvp;
1450 struct vattr *vap = ap->a_vap;
1451 struct componentname *cnp = ap->a_cnp;
1452 struct nfsv2_sattr *sp;
1456 struct nfsnode *np = (struct nfsnode *)0;
1457 struct vnode *newvp = (struct vnode *)0;
1458 caddr_t bpos, dpos, cp2;
1459 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
1460 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1462 int v3 = NFS_ISV3(dvp);
1465 * Oops, not for me..
1467 if (vap->va_type == VSOCK)
1468 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1470 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) {
1473 if (vap->va_vaflags & VA_EXCLUSIVE)
1476 nfsstats.rpccnt[NFSPROC_CREATE]++;
1477 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED +
1478 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1479 nfsm_fhtom(dvp, v3);
1480 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1482 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1483 if (fmode & O_EXCL) {
1484 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
1485 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF);
1487 if (!TAILQ_EMPTY(&in_ifaddrhead))
1488 *tl++ = IA_SIN(TAILQ_FIRST(&in_ifaddrhead))->sin_addr.s_addr;
1491 *tl++ = create_verf;
1492 *tl = ++create_verf;
1494 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
1495 nfsm_v3attrbuild(vap, FALSE);
1498 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1499 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1500 sp->sa_uid = nfs_xdrneg1;
1501 sp->sa_gid = nfs_xdrneg1;
1503 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1504 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1506 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_td, cnp->cn_cred);
1508 nfsm_mtofh(dvp, newvp, v3, gotvp);
1512 newvp = (struct vnode *)0;
1514 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1515 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1521 nfsm_wcc_data(dvp, wccflag);
1525 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
1531 } else if (v3 && (fmode & O_EXCL)) {
1533 * We are normally called with only a partially initialized
1534 * VAP. Since the NFSv3 spec says that server may use the
1535 * file attributes to store the verifier, the spec requires
1536 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1537 * in atime, but we can't really assume that all servers will
1538 * so we ensure that our SETATTR sets both atime and mtime.
1540 if (vap->va_mtime.tv_sec == VNOVAL)
1541 vfs_timestamp(&vap->va_mtime);
1542 if (vap->va_atime.tv_sec == VNOVAL)
1543 vap->va_atime = vap->va_mtime;
1544 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td);
1547 if (cnp->cn_flags & CNP_MAKEENTRY)
1548 cache_enter(dvp, newvp, cnp);
1550 * The new np may have enough info for access
1551 * checks, make sure rucred and wucred are
1552 * initialized for read and write rpc's.
1555 if (np->n_rucred == NULL)
1556 np->n_rucred = crhold(cnp->cn_cred);
1557 if (np->n_wucred == NULL)
1558 np->n_wucred = crhold(cnp->cn_cred);
1561 VTONFS(dvp)->n_flag |= NMODIFIED;
1563 VTONFS(dvp)->n_attrstamp = 0;
1568 * nfs file remove call
1569 * To try and make nfs semantics closer to ufs semantics, a file that has
1570 * other processes using the vnode is renamed instead of removed and then
1571 * removed later on the last close.
1572 * - If v_usecount > 1
1573 * If a rename is not already in the works
1574 * call nfs_sillyrename() to set it up
1578 * nfs_remove(struct vnodeop_desc *a_desc, struct vnode *a_dvp,
1579 * struct vnode *a_vp, struct componentname *a_cnp)
1582 nfs_remove(struct vop_remove_args *ap)
1584 struct vnode *vp = ap->a_vp;
1585 struct vnode *dvp = ap->a_dvp;
1586 struct componentname *cnp = ap->a_cnp;
1587 struct nfsnode *np = VTONFS(vp);
1592 if ((cnp->cn_flags & CNP_HASBUF) == 0)
1593 panic("nfs_remove: no name");
1594 if (vp->v_usecount < 1)
1595 panic("nfs_remove: bad v_usecount");
1597 if (vp->v_type == VDIR)
1599 else if (vp->v_usecount == 1 || (np->n_sillyrename &&
1600 VOP_GETATTR(vp, &vattr, cnp->cn_td) == 0 &&
1601 vattr.va_nlink > 1)) {
1603 * Purge the name cache so that the chance of a lookup for
1604 * the name succeeding while the remove is in progress is
1605 * minimized. Without node locking it can still happen, such
1606 * that an I/O op returns ESTALE, but since you get this if
1607 * another host removes the file..
1611 * throw away biocache buffers, mainly to avoid
1612 * unnecessary delayed writes later.
1614 error = nfs_vinvalbuf(vp, 0, cnp->cn_td, 1);
1617 error = nfs_removerpc(dvp, cnp->cn_nameptr,
1618 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td);
1620 * Kludge City: If the first reply to the remove rpc is lost..
1621 * the reply to the retransmitted request will be ENOENT
1622 * since the file was in fact removed
1623 * Therefore, we cheat and return success.
1625 if (error == ENOENT)
1627 } else if (!np->n_sillyrename)
1628 error = nfs_sillyrename(dvp, vp, cnp);
1629 np->n_attrstamp = 0;
1634 * nfs file remove rpc called from nfs_inactive
1637 nfs_removeit(struct sillyrename *sp)
1639 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen,
1644 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1647 nfs_removerpc(struct vnode *dvp, const char *name, int namelen,
1648 struct ucred *cred, struct thread *td)
1653 caddr_t bpos, dpos, cp2;
1654 int error = 0, wccflag = NFSV3_WCCRATTR;
1655 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1656 int v3 = NFS_ISV3(dvp);
1658 nfsstats.rpccnt[NFSPROC_REMOVE]++;
1659 nfsm_reqhead(dvp, NFSPROC_REMOVE,
1660 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1661 nfsm_fhtom(dvp, v3);
1662 nfsm_strtom(name, namelen, NFS_MAXNAMLEN);
1663 nfsm_request(dvp, NFSPROC_REMOVE, td, cred);
1665 nfsm_wcc_data(dvp, wccflag);
1668 VTONFS(dvp)->n_flag |= NMODIFIED;
1670 VTONFS(dvp)->n_attrstamp = 0;
1675 * nfs file rename call
1677 * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
1678 * struct componentname *a_fcnp, struct vnode *a_tdvp,
1679 * struct vnode *a_tvp, struct componentname *a_tcnp)
1682 nfs_rename(struct vop_rename_args *ap)
1684 struct vnode *fvp = ap->a_fvp;
1685 struct vnode *tvp = ap->a_tvp;
1686 struct vnode *fdvp = ap->a_fdvp;
1687 struct vnode *tdvp = ap->a_tdvp;
1688 struct componentname *tcnp = ap->a_tcnp;
1689 struct componentname *fcnp = ap->a_fcnp;
1693 if ((tcnp->cn_flags & CNP_HASBUF) == 0 ||
1694 (fcnp->cn_flags & CNP_HASBUF) == 0)
1695 panic("nfs_rename: no name");
1697 /* Check for cross-device rename */
1698 if ((fvp->v_mount != tdvp->v_mount) ||
1699 (tvp && (fvp->v_mount != tvp->v_mount))) {
1705 * We have to flush B_DELWRI data prior to renaming
1706 * the file. If we don't, the delayed-write buffers
1707 * can be flushed out later after the file has gone stale
1708 * under NFSV3. NFSV2 does not have this problem because
1709 * ( as far as I can tell ) it flushes dirty buffers more
1713 VOP_FSYNC(fvp, MNT_WAIT, fcnp->cn_td);
1715 VOP_FSYNC(tvp, MNT_WAIT, tcnp->cn_td);
1718 * If the tvp exists and is in use, sillyrename it before doing the
1719 * rename of the new file over it.
1720 * XXX Can't sillyrename a directory.
1722 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename &&
1723 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1729 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1730 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1735 if (fvp->v_type == VDIR) {
1736 if (tvp != NULL && tvp->v_type == VDIR)
1752 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1754 if (error == ENOENT)
1760 * nfs file rename rpc called from nfs_remove() above
1763 nfs_renameit(struct vnode *sdvp, struct componentname *scnp,
1764 struct sillyrename *sp)
1766 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
1767 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td));
1771 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1774 nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen,
1775 struct vnode *tdvp, const char *tnameptr, int tnamelen,
1776 struct ucred *cred, struct thread *td)
1781 caddr_t bpos, dpos, cp2;
1782 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
1783 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1784 int v3 = NFS_ISV3(fdvp);
1786 nfsstats.rpccnt[NFSPROC_RENAME]++;
1787 nfsm_reqhead(fdvp, NFSPROC_RENAME,
1788 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) +
1789 nfsm_rndup(tnamelen));
1790 nfsm_fhtom(fdvp, v3);
1791 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN);
1792 nfsm_fhtom(tdvp, v3);
1793 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN);
1794 nfsm_request(fdvp, NFSPROC_RENAME, td, cred);
1796 nfsm_wcc_data(fdvp, fwccflag);
1797 nfsm_wcc_data(tdvp, twccflag);
1801 VTONFS(fdvp)->n_flag |= NMODIFIED;
1802 VTONFS(tdvp)->n_flag |= NMODIFIED;
1804 VTONFS(fdvp)->n_attrstamp = 0;
1806 VTONFS(tdvp)->n_attrstamp = 0;
1811 * nfs hard link create call
1813 * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp,
1814 * struct componentname *a_cnp)
1817 nfs_link(struct vop_link_args *ap)
1819 struct vnode *vp = ap->a_vp;
1820 struct vnode *tdvp = ap->a_tdvp;
1821 struct componentname *cnp = ap->a_cnp;
1825 caddr_t bpos, dpos, cp2;
1826 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
1827 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1830 if (vp->v_mount != tdvp->v_mount) {
1835 * Push all writes to the server, so that the attribute cache
1836 * doesn't get "out of sync" with the server.
1837 * XXX There should be a better way!
1839 VOP_FSYNC(vp, MNT_WAIT, cnp->cn_td);
1842 nfsstats.rpccnt[NFSPROC_LINK]++;
1843 nfsm_reqhead(vp, NFSPROC_LINK,
1844 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
1846 nfsm_fhtom(tdvp, v3);
1847 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1848 nfsm_request(vp, NFSPROC_LINK, cnp->cn_td, cnp->cn_cred);
1850 nfsm_postop_attr(vp, attrflag);
1851 nfsm_wcc_data(tdvp, wccflag);
1855 VTONFS(tdvp)->n_flag |= NMODIFIED;
1857 VTONFS(vp)->n_attrstamp = 0;
1859 VTONFS(tdvp)->n_attrstamp = 0;
1861 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1863 if (error == EEXIST)
1869 * nfs symbolic link create call
1871 * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1872 * struct componentname *a_cnp, struct vattr *a_vap,
1876 nfs_symlink(struct vop_symlink_args *ap)
1878 struct vnode *dvp = ap->a_dvp;
1879 struct vattr *vap = ap->a_vap;
1880 struct componentname *cnp = ap->a_cnp;
1881 struct nfsv2_sattr *sp;
1885 caddr_t bpos, dpos, cp2;
1886 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
1887 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1888 struct vnode *newvp = (struct vnode *)0;
1889 int v3 = NFS_ISV3(dvp);
1891 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1892 slen = strlen(ap->a_target);
1893 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED +
1894 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3));
1895 nfsm_fhtom(dvp, v3);
1896 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1898 nfsm_v3attrbuild(vap, FALSE);
1900 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
1902 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1903 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
1904 sp->sa_uid = nfs_xdrneg1;
1905 sp->sa_gid = nfs_xdrneg1;
1906 sp->sa_size = nfs_xdrneg1;
1907 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1908 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1912 * Issue the NFS request and get the rpc response.
1914 * Only NFSv3 responses returning an error of 0 actually return
1915 * a file handle that can be converted into newvp without having
1916 * to do an extra lookup rpc.
1918 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_td, cnp->cn_cred);
1921 nfsm_mtofh(dvp, newvp, v3, gotvp);
1922 nfsm_wcc_data(dvp, wccflag);
1926 * out code jumps -> here, mrep is also freed.
1933 * If we get an EEXIST error, silently convert it to no-error
1934 * in case of an NFS retry.
1936 if (error == EEXIST)
1940 * If we do not have (or no longer have) an error, and we could
1941 * not extract the newvp from the response due to the request being
1942 * NFSv2 or the error being EEXIST. We have to do a lookup in order
1943 * to obtain a newvp to return.
1945 if (error == 0 && newvp == NULL) {
1946 struct nfsnode *np = NULL;
1948 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1949 cnp->cn_cred, cnp->cn_td, &np);
1959 VTONFS(dvp)->n_flag |= NMODIFIED;
1961 VTONFS(dvp)->n_attrstamp = 0;
1968 * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
1969 * struct componentname *a_cnp, struct vattr *a_vap)
1972 nfs_mkdir(struct vop_mkdir_args *ap)
1974 struct vnode *dvp = ap->a_dvp;
1975 struct vattr *vap = ap->a_vap;
1976 struct componentname *cnp = ap->a_cnp;
1977 struct nfsv2_sattr *sp;
1982 struct nfsnode *np = (struct nfsnode *)0;
1983 struct vnode *newvp = (struct vnode *)0;
1984 caddr_t bpos, dpos, cp2;
1985 int error = 0, wccflag = NFSV3_WCCRATTR;
1987 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1989 int v3 = NFS_ISV3(dvp);
1991 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_td)) != 0) {
1994 len = cnp->cn_namelen;
1995 nfsstats.rpccnt[NFSPROC_MKDIR]++;
1996 nfsm_reqhead(dvp, NFSPROC_MKDIR,
1997 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3));
1998 nfsm_fhtom(dvp, v3);
1999 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
2001 nfsm_v3attrbuild(vap, FALSE);
2003 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
2004 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
2005 sp->sa_uid = nfs_xdrneg1;
2006 sp->sa_gid = nfs_xdrneg1;
2007 sp->sa_size = nfs_xdrneg1;
2008 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
2009 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
2011 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_td, cnp->cn_cred);
2013 nfsm_mtofh(dvp, newvp, v3, gotvp);
2015 nfsm_wcc_data(dvp, wccflag);
2018 VTONFS(dvp)->n_flag |= NMODIFIED;
2020 VTONFS(dvp)->n_attrstamp = 0;
2022 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
2023 * if we can succeed in looking up the directory.
2025 if (error == EEXIST || (!error && !gotvp)) {
2028 newvp = (struct vnode *)0;
2030 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
2034 if (newvp->v_type != VDIR)
2047 * nfs remove directory call
2049 * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
2050 * struct componentname *a_cnp)
2053 nfs_rmdir(struct vop_rmdir_args *ap)
2055 struct vnode *vp = ap->a_vp;
2056 struct vnode *dvp = ap->a_dvp;
2057 struct componentname *cnp = ap->a_cnp;
2061 caddr_t bpos, dpos, cp2;
2062 int error = 0, wccflag = NFSV3_WCCRATTR;
2063 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2064 int v3 = NFS_ISV3(dvp);
2068 nfsstats.rpccnt[NFSPROC_RMDIR]++;
2069 nfsm_reqhead(dvp, NFSPROC_RMDIR,
2070 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
2071 nfsm_fhtom(dvp, v3);
2072 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
2073 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_td, cnp->cn_cred);
2075 nfsm_wcc_data(dvp, wccflag);
2078 VTONFS(dvp)->n_flag |= NMODIFIED;
2080 VTONFS(dvp)->n_attrstamp = 0;
2086 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2088 if (error == ENOENT)
2096 * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
2099 nfs_readdir(struct vop_readdir_args *ap)
2101 struct vnode *vp = ap->a_vp;
2102 struct nfsnode *np = VTONFS(vp);
2103 struct uio *uio = ap->a_uio;
2107 if (vp->v_type != VDIR)
2110 * First, check for hit on the EOF offset cache
2112 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2113 (np->n_flag & NMODIFIED) == 0) {
2114 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) {
2115 if (NQNFS_CKCACHABLE(vp, ND_READ)) {
2116 nfsstats.direofcache_hits++;
2119 } else if (VOP_GETATTR(vp, &vattr, uio->uio_td) == 0 &&
2120 np->n_mtime == vattr.va_mtime.tv_sec) {
2121 nfsstats.direofcache_hits++;
2127 * Call nfs_bioread() to do the real work.
2129 tresid = uio->uio_resid;
2130 error = nfs_bioread(vp, uio, 0);
2132 if (!error && uio->uio_resid == tresid)
2133 nfsstats.direofcache_misses++;
2139 * Called from below the buffer cache by nfs_doio().
2142 nfs_readdirrpc(struct vnode *vp, struct uio *uiop)
2145 struct dirent *dp = NULL;
2150 caddr_t bpos, dpos, cp2;
2151 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2153 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2154 struct nfsnode *dnp = VTONFS(vp);
2156 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2158 int v3 = NFS_ISV3(vp);
2161 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2162 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2163 panic("nfs readdirrpc bad uio");
2167 * If there is no cookie, assume directory was stale.
2169 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2173 return (NFSERR_BAD_COOKIE);
2175 * Loop around doing readdir rpc's of size nm_readdirsize
2176 * truncated to a multiple of DIRBLKSIZ.
2177 * The stopping criteria is EOF or buffer full.
2179 while (more_dirs && bigenough) {
2180 nfsstats.rpccnt[NFSPROC_READDIR]++;
2181 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) +
2185 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
2186 *tl++ = cookie.nfsuquad[0];
2187 *tl++ = cookie.nfsuquad[1];
2188 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2189 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2191 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2192 *tl++ = cookie.nfsuquad[0];
2194 *tl = txdr_unsigned(nmp->nm_readdirsize);
2195 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_td, nfs_vpcred(vp, ND_READ));
2197 nfsm_postop_attr(vp, attrflag);
2199 nfsm_dissect(tl, u_int32_t *,
2201 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2202 dnp->n_cookieverf.nfsuquad[1] = *tl;
2208 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2209 more_dirs = fxdr_unsigned(int, *tl);
2211 /* loop thru the dir entries, doctoring them to 4bsd form */
2212 while (more_dirs && bigenough) {
2214 nfsm_dissect(tl, u_int32_t *,
2216 fileno = fxdr_hyper(tl);
2217 len = fxdr_unsigned(int, *(tl + 2));
2219 nfsm_dissect(tl, u_int32_t *,
2221 fileno = fxdr_unsigned(u_quad_t, *tl++);
2222 len = fxdr_unsigned(int, *tl);
2224 if (len <= 0 || len > NFS_MAXNAMLEN) {
2229 tlen = nfsm_rndup(len);
2231 tlen += 4; /* To ensure null termination */
2232 left = DIRBLKSIZ - blksiz;
2233 if ((tlen + DIRHDSIZ) > left) {
2234 dp->d_reclen += left;
2235 uiop->uio_iov->iov_base += left;
2236 uiop->uio_iov->iov_len -= left;
2237 uiop->uio_offset += left;
2238 uiop->uio_resid -= left;
2241 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2244 dp = (struct dirent *)uiop->uio_iov->iov_base;
2245 dp->d_fileno = (int)fileno;
2247 dp->d_reclen = tlen + DIRHDSIZ;
2248 dp->d_type = DT_UNKNOWN;
2249 blksiz += dp->d_reclen;
2250 if (blksiz == DIRBLKSIZ)
2252 uiop->uio_offset += DIRHDSIZ;
2253 uiop->uio_resid -= DIRHDSIZ;
2254 uiop->uio_iov->iov_base += DIRHDSIZ;
2255 uiop->uio_iov->iov_len -= DIRHDSIZ;
2256 nfsm_mtouio(uiop, len);
2257 cp = uiop->uio_iov->iov_base;
2259 *cp = '\0'; /* null terminate */
2260 uiop->uio_iov->iov_base += tlen;
2261 uiop->uio_iov->iov_len -= tlen;
2262 uiop->uio_offset += tlen;
2263 uiop->uio_resid -= tlen;
2265 nfsm_adv(nfsm_rndup(len));
2267 nfsm_dissect(tl, u_int32_t *,
2270 nfsm_dissect(tl, u_int32_t *,
2274 cookie.nfsuquad[0] = *tl++;
2276 cookie.nfsuquad[1] = *tl++;
2281 more_dirs = fxdr_unsigned(int, *tl);
2284 * If at end of rpc data, get the eof boolean
2287 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2288 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2293 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2294 * by increasing d_reclen for the last record.
2297 left = DIRBLKSIZ - blksiz;
2298 dp->d_reclen += left;
2299 uiop->uio_iov->iov_base += left;
2300 uiop->uio_iov->iov_len -= left;
2301 uiop->uio_offset += left;
2302 uiop->uio_resid -= left;
2306 * We are now either at the end of the directory or have filled the
2310 dnp->n_direofoffset = uiop->uio_offset;
2312 if (uiop->uio_resid > 0)
2313 printf("EEK! readdirrpc resid > 0\n");
2314 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2322 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2325 nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop)
2332 struct vnode *newvp;
2334 caddr_t bpos, dpos, cp2, dpossav1, dpossav2;
2335 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2;
2336 struct nameidata nami, *ndp = &nami;
2337 struct componentname *cnp = &ndp->ni_cnd;
2339 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2340 struct nfsnode *dnp = VTONFS(vp), *np;
2343 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2344 int attrflag, fhsize;
2347 dp = (struct dirent *)0;
2350 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2351 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2352 panic("nfs readdirplusrpc bad uio");
2358 * If there is no cookie, assume directory was stale.
2360 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2364 return (NFSERR_BAD_COOKIE);
2366 * Loop around doing readdir rpc's of size nm_readdirsize
2367 * truncated to a multiple of DIRBLKSIZ.
2368 * The stopping criteria is EOF or buffer full.
2370 while (more_dirs && bigenough) {
2371 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
2372 nfsm_reqhead(vp, NFSPROC_READDIRPLUS,
2373 NFSX_FH(1) + 6 * NFSX_UNSIGNED);
2375 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
2376 *tl++ = cookie.nfsuquad[0];
2377 *tl++ = cookie.nfsuquad[1];
2378 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2379 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2380 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2381 *tl = txdr_unsigned(nmp->nm_rsize);
2382 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_td, nfs_vpcred(vp, ND_READ));
2383 nfsm_postop_attr(vp, attrflag);
2388 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2389 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2390 dnp->n_cookieverf.nfsuquad[1] = *tl++;
2391 more_dirs = fxdr_unsigned(int, *tl);
2393 /* loop thru the dir entries, doctoring them to 4bsd form */
2394 while (more_dirs && bigenough) {
2395 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2396 fileno = fxdr_hyper(tl);
2397 len = fxdr_unsigned(int, *(tl + 2));
2398 if (len <= 0 || len > NFS_MAXNAMLEN) {
2403 tlen = nfsm_rndup(len);
2405 tlen += 4; /* To ensure null termination*/
2406 left = DIRBLKSIZ - blksiz;
2407 if ((tlen + DIRHDSIZ) > left) {
2408 dp->d_reclen += left;
2409 uiop->uio_iov->iov_base += left;
2410 uiop->uio_iov->iov_len -= left;
2411 uiop->uio_offset += left;
2412 uiop->uio_resid -= left;
2415 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2418 dp = (struct dirent *)uiop->uio_iov->iov_base;
2419 dp->d_fileno = (int)fileno;
2421 dp->d_reclen = tlen + DIRHDSIZ;
2422 dp->d_type = DT_UNKNOWN;
2423 blksiz += dp->d_reclen;
2424 if (blksiz == DIRBLKSIZ)
2426 uiop->uio_offset += DIRHDSIZ;
2427 uiop->uio_resid -= DIRHDSIZ;
2428 uiop->uio_iov->iov_base += DIRHDSIZ;
2429 uiop->uio_iov->iov_len -= DIRHDSIZ;
2430 cnp->cn_nameptr = uiop->uio_iov->iov_base;
2431 cnp->cn_namelen = len;
2432 nfsm_mtouio(uiop, len);
2433 cp = uiop->uio_iov->iov_base;
2436 uiop->uio_iov->iov_base += tlen;
2437 uiop->uio_iov->iov_len -= tlen;
2438 uiop->uio_offset += tlen;
2439 uiop->uio_resid -= tlen;
2441 nfsm_adv(nfsm_rndup(len));
2442 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2444 cookie.nfsuquad[0] = *tl++;
2445 cookie.nfsuquad[1] = *tl++;
2450 * Since the attributes are before the file handle
2451 * (sigh), we must skip over the attributes and then
2452 * come back and get them.
2454 attrflag = fxdr_unsigned(int, *tl);
2458 nfsm_adv(NFSX_V3FATTR);
2459 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2460 doit = fxdr_unsigned(int, *tl);
2462 nfsm_getfh(fhp, fhsize, 1);
2463 if (NFS_CMPFH(dnp, fhp, fhsize)) {
2468 error = nfs_nget(vp->v_mount, fhp,
2476 if (doit && bigenough) {
2481 nfsm_loadattr(newvp, (struct vattr *)0);
2485 IFTODT(VTTOIF(np->n_vattr.va_type));
2487 cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp);
2490 /* Just skip over the file handle */
2491 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2492 i = fxdr_unsigned(int, *tl);
2493 nfsm_adv(nfsm_rndup(i));
2495 if (newvp != NULLVP) {
2502 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2503 more_dirs = fxdr_unsigned(int, *tl);
2506 * If at end of rpc data, get the eof boolean
2509 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2510 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2515 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2516 * by increasing d_reclen for the last record.
2519 left = DIRBLKSIZ - blksiz;
2520 dp->d_reclen += left;
2521 uiop->uio_iov->iov_base += left;
2522 uiop->uio_iov->iov_len -= left;
2523 uiop->uio_offset += left;
2524 uiop->uio_resid -= left;
2528 * We are now either at the end of the directory or have filled the
2532 dnp->n_direofoffset = uiop->uio_offset;
2534 if (uiop->uio_resid > 0)
2535 printf("EEK! readdirplusrpc resid > 0\n");
2536 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2540 if (newvp != NULLVP) {
2551 * Silly rename. To make the NFS filesystem that is stateless look a little
2552 * more like the "ufs" a remove of an active vnode is translated to a rename
2553 * to a funny looking filename that is removed by nfs_inactive on the
2554 * nfsnode. There is the potential for another process on a different client
2555 * to create the same funny name between the nfs_lookitup() fails and the
2556 * nfs_rename() completes, but...
2559 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2561 struct sillyrename *sp;
2566 * We previously purged dvp instead of vp. I don't know why, it
2567 * completely destroys performance. We can't do it anyway with the
2568 * new VFS API since we would be breaking the namecache topology.
2573 if (vp->v_type == VDIR)
2574 panic("nfs: sillyrename dir");
2576 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2577 M_NFSREQ, M_WAITOK);
2578 sp->s_cred = crdup(cnp->cn_cred);
2582 /* Fudge together a funny name */
2583 sp->s_namlen = sprintf(sp->s_name, ".nfsA%08x4.4", (int)cnp->cn_td);
2585 /* Try lookitups until we get one that isn't there */
2586 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2587 cnp->cn_td, (struct nfsnode **)0) == 0) {
2589 if (sp->s_name[4] > 'z') {
2594 error = nfs_renameit(dvp, cnp, sp);
2597 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2599 np->n_sillyrename = sp;
2604 free((caddr_t)sp, M_NFSREQ);
2609 * Look up a file name and optionally either update the file handle or
2610 * allocate an nfsnode, depending on the value of npp.
2611 * npp == NULL --> just do the lookup
2612 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2614 * *npp != NULL --> update the file handle in the vnode
2617 nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred,
2618 struct thread *td, struct nfsnode **npp)
2623 struct vnode *newvp = (struct vnode *)0;
2624 struct nfsnode *np, *dnp = VTONFS(dvp);
2625 caddr_t bpos, dpos, cp2;
2626 int error = 0, fhlen, attrflag;
2627 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2629 int v3 = NFS_ISV3(dvp);
2631 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
2632 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
2633 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2634 nfsm_fhtom(dvp, v3);
2635 nfsm_strtom(name, len, NFS_MAXNAMLEN);
2636 nfsm_request(dvp, NFSPROC_LOOKUP, td, cred);
2637 if (npp && !error) {
2638 nfsm_getfh(nfhp, fhlen, v3);
2641 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2642 free((caddr_t)np->n_fhp, M_NFSBIGFH);
2643 np->n_fhp = &np->n_fh;
2644 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2645 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK);
2646 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2647 np->n_fhsize = fhlen;
2649 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
2653 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
2661 nfsm_postop_attr(newvp, attrflag);
2662 if (!attrflag && *npp == NULL) {
2671 nfsm_loadattr(newvp, (struct vattr *)0);
2675 if (npp && *npp == NULL) {
2690 * Nfs Version 3 commit rpc
2693 nfs_commit(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td)
2698 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2699 caddr_t bpos, dpos, cp2;
2700 int error = 0, wccflag = NFSV3_WCCRATTR;
2701 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2703 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
2705 nfsstats.rpccnt[NFSPROC_COMMIT]++;
2706 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1));
2708 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2709 txdr_hyper(offset, tl);
2711 *tl = txdr_unsigned(cnt);
2712 nfsm_request(vp, NFSPROC_COMMIT, td, nfs_vpcred(vp, ND_WRITE));
2713 nfsm_wcc_data(vp, wccflag);
2715 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF);
2716 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
2717 NFSX_V3WRITEVERF)) {
2718 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
2720 error = NFSERR_STALEWRITEVERF;
2730 * - make nfs_bmap() essentially a no-op that does no translation
2731 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
2732 * (Maybe I could use the process's page mapping, but I was concerned that
2733 * Kernel Write might not be enabled and also figured copyout() would do
2734 * a lot more work than bcopy() and also it currently happens in the
2735 * context of the swapper process (2).
2737 * nfs_bmap(struct vnode *a_vp, daddr_t a_bn, struct vnode **a_vpp,
2738 * daddr_t *a_bnp, int *a_runp, int *a_runb)
2741 nfs_bmap(struct vop_bmap_args *ap)
2743 struct vnode *vp = ap->a_vp;
2745 if (ap->a_vpp != NULL)
2747 if (ap->a_bnp != NULL)
2748 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize);
2749 if (ap->a_runp != NULL)
2751 if (ap->a_runb != NULL)
2758 * For async requests when nfsiod(s) are running, queue the request by
2759 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the
2763 nfs_strategy(struct vop_strategy_args *ap)
2765 struct buf *bp = ap->a_bp;
2769 KASSERT(!(bp->b_flags & B_DONE), ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2770 KASSERT(BUF_REFCNT(bp) > 0, ("nfs_strategy: buffer %p not locked", bp));
2772 if (bp->b_flags & B_PHYS)
2773 panic("nfs physio");
2775 if (bp->b_flags & B_ASYNC)
2778 td = curthread; /* XXX */
2781 * If the op is asynchronous and an i/o daemon is waiting
2782 * queue the request, wake it up and wait for completion
2783 * otherwise just do it ourselves.
2785 if ((bp->b_flags & B_ASYNC) == 0 ||
2786 nfs_asyncio(bp, td))
2787 error = nfs_doio(bp, td);
2794 * NB Currently unsupported.
2796 * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred,
2797 * struct thread *a_td)
2801 nfs_mmap(struct vop_mmap_args *ap)
2807 * fsync vnode op. Just call nfs_flush() with commit == 1.
2809 * nfs_fsync(struct vnodeop_desc *a_desc, struct vnode *a_vp,
2810 * struct ucred * a_cred, int a_waitfor, struct thread *a_td)
2814 nfs_fsync(struct vop_fsync_args *ap)
2816 return (nfs_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1));
2820 * Flush all the blocks associated with a vnode.
2821 * Walk through the buffer pool and push any dirty pages
2822 * associated with the vnode.
2825 nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit)
2827 struct nfsnode *np = VTONFS(vp);
2831 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2832 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2834 u_quad_t off, endoff, toff;
2835 struct buf **bvec = NULL;
2836 #ifndef NFS_COMMITBVECSIZ
2837 #define NFS_COMMITBVECSIZ 20
2839 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2840 int bvecsize = 0, bveccount;
2842 if (nmp->nm_flag & NFSMNT_INT)
2847 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2848 * server, but nas not been committed to stable storage on the server
2849 * yet. On the first pass, the byte range is worked out and the commit
2850 * rpc is done. On the second pass, nfs_writebp() is called to do the
2857 if (NFS_ISV3(vp) && commit) {
2860 * Count up how many buffers waiting for a commit.
2863 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2864 nbp = TAILQ_NEXT(bp, b_vnbufs);
2865 if (BUF_REFCNT(bp) == 0 &&
2866 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2867 == (B_DELWRI | B_NEEDCOMMIT))
2871 * Allocate space to remember the list of bufs to commit. It is
2872 * important to use M_NOWAIT here to avoid a race with nfs_write.
2873 * If we can't get memory (for whatever reason), we will end up
2874 * committing the buffers one-by-one in the loop below.
2876 if (bvec != NULL && bvec != bvec_on_stack)
2878 if (bveccount > NFS_COMMITBVECSIZ) {
2879 bvec = (struct buf **)
2880 malloc(bveccount * sizeof(struct buf *),
2883 bvec = bvec_on_stack;
2884 bvecsize = NFS_COMMITBVECSIZ;
2886 bvecsize = bveccount;
2888 bvec = bvec_on_stack;
2889 bvecsize = NFS_COMMITBVECSIZ;
2891 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2892 nbp = TAILQ_NEXT(bp, b_vnbufs);
2893 if (bvecpos >= bvecsize)
2895 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2896 (B_DELWRI | B_NEEDCOMMIT) ||
2897 BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
2901 * NOTE: we are not clearing B_DONE here, so we have
2902 * to do it later on in this routine if we intend to
2903 * initiate I/O on the bp.
2905 * Note: to avoid loopback deadlocks, we do not
2906 * assign b_runningbufspace.
2908 bp->b_flags |= B_WRITEINPROG;
2909 vfs_busy_pages(bp, 1);
2912 * bp is protected by being locked, but nbp is not
2913 * and vfs_busy_pages() may sleep. We have to
2916 nbp = TAILQ_NEXT(bp, b_vnbufs);
2919 * A list of these buffers is kept so that the
2920 * second loop knows which buffers have actually
2921 * been committed. This is necessary, since there
2922 * may be a race between the commit rpc and new
2923 * uncommitted writes on the file.
2925 bvec[bvecpos++] = bp;
2926 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2930 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2938 * Commit data on the server, as required. Note that
2939 * nfs_commit will use the vnode's cred for the commit.
2941 retv = nfs_commit(vp, off, (int)(endoff - off), td);
2943 if (retv == NFSERR_STALEWRITEVERF)
2944 nfs_clearcommit(vp->v_mount);
2947 * Now, either mark the blocks I/O done or mark the
2948 * blocks dirty, depending on whether the commit
2951 for (i = 0; i < bvecpos; i++) {
2953 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG | B_CLUSTEROK);
2956 * Error, leave B_DELWRI intact
2958 vfs_unbusy_pages(bp);
2962 * Success, remove B_DELWRI ( bundirty() ).
2964 * b_dirtyoff/b_dirtyend seem to be NFS
2965 * specific. We should probably move that
2966 * into bundirty(). XXX
2970 bp->b_flags |= B_ASYNC;
2972 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR);
2973 bp->b_dirtyoff = bp->b_dirtyend = 0;
2981 * Start/do any write(s) that are required.
2985 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2986 nbp = TAILQ_NEXT(bp, b_vnbufs);
2987 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) {
2988 if (waitfor != MNT_WAIT || passone)
2990 error = BUF_TIMELOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL,
2991 "nfsfsync", slpflag, slptimeo);
2994 panic("nfs_fsync: inconsistent lock");
2995 if (error == ENOLCK)
2997 if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) {
3001 if (slpflag == PCATCH) {
3007 if ((bp->b_flags & B_DELWRI) == 0)
3008 panic("nfs_fsync: not dirty");
3009 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
3014 if (passone || !commit)
3015 bp->b_flags |= B_ASYNC;
3017 bp->b_flags |= B_ASYNC | B_WRITEINPROG;
3019 VOP_BWRITE(bp->b_vp, bp);
3027 if (waitfor == MNT_WAIT) {
3028 while (vp->v_numoutput) {
3029 vp->v_flag |= VBWAIT;
3030 error = tsleep((caddr_t)&vp->v_numoutput,
3031 slpflag, "nfsfsync", slptimeo);
3033 if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) {
3037 if (slpflag == PCATCH) {
3043 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd) && commit) {
3047 if (np->n_flag & NWRITEERR) {
3048 error = np->n_error;
3049 np->n_flag &= ~NWRITEERR;
3052 if (bvec != NULL && bvec != bvec_on_stack)
3058 * NFS advisory byte-level locks.
3059 * Currently unsupported.
3061 * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl,
3065 nfs_advlock(struct vop_advlock_args *ap)
3067 struct nfsnode *np = VTONFS(ap->a_vp);
3070 * The following kludge is to allow diskless support to work
3071 * until a real NFS lockd is implemented. Basically, just pretend
3072 * that this is a local lock.
3074 return (lf_advlock(ap, &(np->n_lockf), np->n_size));
3078 * Print out the contents of an nfsnode.
3080 * nfs_print(struct vnode *a_vp)
3083 nfs_print(struct vop_print_args *ap)
3085 struct vnode *vp = ap->a_vp;
3086 struct nfsnode *np = VTONFS(vp);
3088 printf("tag VT_NFS, fileid %ld fsid 0x%x",
3089 np->n_vattr.va_fileid, np->n_vattr.va_fsid);
3090 if (vp->v_type == VFIFO)
3097 * Just call nfs_writebp() with the force argument set to 1.
3099 * NOTE: B_DONE may or may not be set in a_bp on call.
3101 * nfs_bwrite(struct vnode *a_bp)
3104 nfs_bwrite(struct vop_bwrite_args *ap)
3106 return (nfs_writebp(ap->a_bp, 1, curthread));
3110 * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless
3111 * the force flag is one and it also handles the B_NEEDCOMMIT flag. We set
3112 * B_CACHE if this is a VMIO buffer.
3115 nfs_writebp(struct buf *bp, int force, struct thread *td)
3118 int oldflags = bp->b_flags;
3124 if (BUF_REFCNT(bp) == 0)
3125 panic("bwrite: buffer is not locked???");
3127 if (bp->b_flags & B_INVAL) {
3132 bp->b_flags |= B_CACHE;
3135 * Undirty the bp. We will redirty it later if the I/O fails.
3140 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR);
3142 bp->b_vp->v_numoutput++;
3146 * Note: to avoid loopback deadlocks, we do not
3147 * assign b_runningbufspace.
3149 vfs_busy_pages(bp, 1);
3152 bp->b_flags |= B_WRITEINPROG;
3154 VOP_STRATEGY(bp->b_vp, bp);
3156 if( (oldflags & B_ASYNC) == 0) {
3157 int rtval = biowait(bp);
3159 if (oldflags & B_DELWRI) {
3161 reassignbuf(bp, bp->b_vp);
3173 * nfs special file access vnode op.
3174 * Essentially just get vattr and then imitate iaccess() since the device is
3175 * local to the client.
3177 * nfsspec_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
3178 * struct thread *a_td)
3181 nfsspec_access(struct vop_access_args *ap)
3185 struct ucred *cred = ap->a_cred;
3186 struct vnode *vp = ap->a_vp;
3187 mode_t mode = ap->a_mode;
3193 * Disallow write attempts on filesystems mounted read-only;
3194 * unless the file is a socket, fifo, or a block or character
3195 * device resident on the filesystem.
3197 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3198 switch (vp->v_type) {
3208 * If you're the super-user,
3209 * you always get access.
3211 if (cred->cr_uid == 0)
3214 error = VOP_GETATTR(vp, vap, ap->a_td);
3218 * Access check is based on only one of owner, group, public.
3219 * If not owner, then check group. If not a member of the
3220 * group, then check public access.
3222 if (cred->cr_uid != vap->va_uid) {
3224 gp = cred->cr_groups;
3225 for (i = 0; i < cred->cr_ngroups; i++, gp++)
3226 if (vap->va_gid == *gp)
3232 error = (vap->va_mode & mode) == mode ? 0 : EACCES;
3237 * Read wrapper for special devices.
3239 * nfsspec_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3240 * struct ucred *a_cred)
3243 nfsspec_read(struct vop_read_args *ap)
3245 struct nfsnode *np = VTONFS(ap->a_vp);
3251 getnanotime(&np->n_atim);
3252 return (VOCALL(spec_vnode_vops, &ap->a_head));
3256 * Write wrapper for special devices.
3258 * nfsspec_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3259 * struct ucred *a_cred)
3262 nfsspec_write(struct vop_write_args *ap)
3264 struct nfsnode *np = VTONFS(ap->a_vp);
3270 getnanotime(&np->n_mtim);
3271 return (VOCALL(spec_vnode_vops, &ap->a_head));
3275 * Close wrapper for special devices.
3277 * Update the times on the nfsnode then do device close.
3279 * nfsspec_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
3280 * struct thread *a_td)
3283 nfsspec_close(struct vop_close_args *ap)
3285 struct vnode *vp = ap->a_vp;
3286 struct nfsnode *np = VTONFS(vp);
3289 if (np->n_flag & (NACC | NUPD)) {
3291 if (vp->v_usecount == 1 &&
3292 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3294 if (np->n_flag & NACC)
3295 vattr.va_atime = np->n_atim;
3296 if (np->n_flag & NUPD)
3297 vattr.va_mtime = np->n_mtim;
3298 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE), ap->a_td);
3301 return (VOCALL(spec_vnode_vops, &ap->a_head));
3305 * Read wrapper for fifos.
3307 * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3308 * struct ucred *a_cred)
3311 nfsfifo_read(struct vop_read_args *ap)
3313 struct nfsnode *np = VTONFS(ap->a_vp);
3319 getnanotime(&np->n_atim);
3320 return (VOCALL(fifo_vnode_vops, &ap->a_head));
3324 * Write wrapper for fifos.
3326 * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3327 * struct ucred *a_cred)
3330 nfsfifo_write(struct vop_write_args *ap)
3332 struct nfsnode *np = VTONFS(ap->a_vp);
3338 getnanotime(&np->n_mtim);
3339 return (VOCALL(fifo_vnode_vops, &ap->a_head));
3343 * Close wrapper for fifos.
3345 * Update the times on the nfsnode then do fifo close.
3347 * nfsfifo_close(struct vnode *a_vp, int a_fflag, struct thread *a_td)
3350 nfsfifo_close(struct vop_close_args *ap)
3352 struct vnode *vp = ap->a_vp;
3353 struct nfsnode *np = VTONFS(vp);
3357 if (np->n_flag & (NACC | NUPD)) {
3359 if (np->n_flag & NACC)
3361 if (np->n_flag & NUPD)
3364 if (vp->v_usecount == 1 &&
3365 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3367 if (np->n_flag & NACC)
3368 vattr.va_atime = np->n_atim;
3369 if (np->n_flag & NUPD)
3370 vattr.va_mtime = np->n_mtim;
3371 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE), ap->a_td);
3374 return (VOCALL(fifo_vnode_vops, &ap->a_head));