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
42 * vnode op calls for Sun NFS version 2 and 3
47 #include <sys/param.h>
48 #include <sys/kernel.h>
49 #include <sys/systm.h>
50 #include <sys/resourcevar.h>
52 #include <sys/mount.h>
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>
67 #include <vm/vm_extern.h>
69 #include <fs/fifofs/fifo.h>
71 #include <nfs/rpcv2.h>
72 #include <nfs/nfsproto.h>
74 #include <nfs/nfsnode.h>
75 #include <nfs/nfsmount.h>
76 #include <nfs/xdr_subs.h>
77 #include <nfs/nfsm_subs.h>
78 #include <nfs/nqnfs.h>
79 #include <nfs/nfs_lock.h>
82 #include <netinet/in.h>
83 #include <netinet/in_var.h>
90 * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these
91 * calls are not in getblk() and brelse() so that they would not be necessary
95 #define vfs_busy_pages(bp, f)
98 static int nfsspec_read __P((struct vop_read_args *));
99 static int nfsspec_write __P((struct vop_write_args *));
100 static int nfsfifo_read __P((struct vop_read_args *));
101 static int nfsfifo_write __P((struct vop_write_args *));
102 static int nfsspec_close __P((struct vop_close_args *));
103 static int nfsfifo_close __P((struct vop_close_args *));
104 #define nfs_poll vop_nopoll
105 static int nfs_flush __P((struct vnode *,struct ucred *,int,struct proc *,int));
106 static int nfs_setattrrpc __P((struct vnode *,struct vattr *,struct ucred *,struct proc *));
107 static int nfs_lookup __P((struct vop_lookup_args *));
108 static int nfs_create __P((struct vop_create_args *));
109 static int nfs_mknod __P((struct vop_mknod_args *));
110 static int nfs_open __P((struct vop_open_args *));
111 static int nfs_close __P((struct vop_close_args *));
112 static int nfs_access __P((struct vop_access_args *));
113 static int nfs_getattr __P((struct vop_getattr_args *));
114 static int nfs_setattr __P((struct vop_setattr_args *));
115 static int nfs_read __P((struct vop_read_args *));
116 static int nfs_fsync __P((struct vop_fsync_args *));
117 static int nfs_remove __P((struct vop_remove_args *));
118 static int nfs_link __P((struct vop_link_args *));
119 static int nfs_rename __P((struct vop_rename_args *));
120 static int nfs_mkdir __P((struct vop_mkdir_args *));
121 static int nfs_rmdir __P((struct vop_rmdir_args *));
122 static int nfs_symlink __P((struct vop_symlink_args *));
123 static int nfs_readdir __P((struct vop_readdir_args *));
124 static int nfs_strategy __P((struct vop_strategy_args *));
125 static int nfs_lookitup __P((struct vnode *, const char *, int,
126 struct ucred *, struct proc *, struct nfsnode **));
127 static int nfs_sillyrename __P((struct vnode *,struct vnode *,struct componentname *));
128 static int nfsspec_access __P((struct vop_access_args *));
129 static int nfs_readlink __P((struct vop_readlink_args *));
130 static int nfs_print __P((struct vop_print_args *));
131 static int nfs_advlock __P((struct vop_advlock_args *));
133 * Global vfs data structures for nfs
135 vop_t **nfsv2_vnodeop_p;
136 static struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = {
137 { &vop_default_desc, (vop_t *) vop_defaultop },
138 { &vop_access_desc, (vop_t *) nfs_access },
139 { &vop_advlock_desc, (vop_t *) nfs_advlock },
140 { &vop_close_desc, (vop_t *) nfs_close },
141 { &vop_create_desc, (vop_t *) nfs_create },
142 { &vop_fsync_desc, (vop_t *) nfs_fsync },
143 { &vop_getattr_desc, (vop_t *) nfs_getattr },
144 { &vop_getpages_desc, (vop_t *) nfs_getpages },
145 { &vop_putpages_desc, (vop_t *) nfs_putpages },
146 { &vop_inactive_desc, (vop_t *) nfs_inactive },
147 { &vop_islocked_desc, (vop_t *) vop_stdislocked },
148 { &vop_lease_desc, (vop_t *) vop_null },
149 { &vop_link_desc, (vop_t *) nfs_link },
150 { &vop_lock_desc, (vop_t *) vop_sharedlock },
151 { &vop_lookup_desc, (vop_t *) nfs_lookup },
152 { &vop_mkdir_desc, (vop_t *) nfs_mkdir },
153 { &vop_mknod_desc, (vop_t *) nfs_mknod },
154 { &vop_open_desc, (vop_t *) nfs_open },
155 { &vop_poll_desc, (vop_t *) nfs_poll },
156 { &vop_print_desc, (vop_t *) nfs_print },
157 { &vop_read_desc, (vop_t *) nfs_read },
158 { &vop_readdir_desc, (vop_t *) nfs_readdir },
159 { &vop_readlink_desc, (vop_t *) nfs_readlink },
160 { &vop_reclaim_desc, (vop_t *) nfs_reclaim },
161 { &vop_remove_desc, (vop_t *) nfs_remove },
162 { &vop_rename_desc, (vop_t *) nfs_rename },
163 { &vop_rmdir_desc, (vop_t *) nfs_rmdir },
164 { &vop_setattr_desc, (vop_t *) nfs_setattr },
165 { &vop_strategy_desc, (vop_t *) nfs_strategy },
166 { &vop_symlink_desc, (vop_t *) nfs_symlink },
167 { &vop_unlock_desc, (vop_t *) vop_stdunlock },
168 { &vop_write_desc, (vop_t *) nfs_write },
171 static struct vnodeopv_desc nfsv2_vnodeop_opv_desc =
172 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries };
173 VNODEOP_SET(nfsv2_vnodeop_opv_desc);
176 * Special device vnode ops
178 vop_t **spec_nfsv2nodeop_p;
179 static struct vnodeopv_entry_desc nfsv2_specop_entries[] = {
180 { &vop_default_desc, (vop_t *) spec_vnoperate },
181 { &vop_access_desc, (vop_t *) nfsspec_access },
182 { &vop_close_desc, (vop_t *) nfsspec_close },
183 { &vop_fsync_desc, (vop_t *) nfs_fsync },
184 { &vop_getattr_desc, (vop_t *) nfs_getattr },
185 { &vop_islocked_desc, (vop_t *) vop_stdislocked },
186 { &vop_inactive_desc, (vop_t *) nfs_inactive },
187 { &vop_lock_desc, (vop_t *) vop_sharedlock },
188 { &vop_print_desc, (vop_t *) nfs_print },
189 { &vop_read_desc, (vop_t *) nfsspec_read },
190 { &vop_reclaim_desc, (vop_t *) nfs_reclaim },
191 { &vop_setattr_desc, (vop_t *) nfs_setattr },
192 { &vop_unlock_desc, (vop_t *) vop_stdunlock },
193 { &vop_write_desc, (vop_t *) nfsspec_write },
196 static struct vnodeopv_desc spec_nfsv2nodeop_opv_desc =
197 { &spec_nfsv2nodeop_p, nfsv2_specop_entries };
198 VNODEOP_SET(spec_nfsv2nodeop_opv_desc);
200 vop_t **fifo_nfsv2nodeop_p;
201 static struct vnodeopv_entry_desc nfsv2_fifoop_entries[] = {
202 { &vop_default_desc, (vop_t *) fifo_vnoperate },
203 { &vop_access_desc, (vop_t *) nfsspec_access },
204 { &vop_close_desc, (vop_t *) nfsfifo_close },
205 { &vop_fsync_desc, (vop_t *) nfs_fsync },
206 { &vop_getattr_desc, (vop_t *) nfs_getattr },
207 { &vop_inactive_desc, (vop_t *) nfs_inactive },
208 { &vop_islocked_desc, (vop_t *) vop_stdislocked },
209 { &vop_lock_desc, (vop_t *) vop_sharedlock },
210 { &vop_print_desc, (vop_t *) nfs_print },
211 { &vop_read_desc, (vop_t *) nfsfifo_read },
212 { &vop_reclaim_desc, (vop_t *) nfs_reclaim },
213 { &vop_setattr_desc, (vop_t *) nfs_setattr },
214 { &vop_unlock_desc, (vop_t *) vop_stdunlock },
215 { &vop_write_desc, (vop_t *) nfsfifo_write },
218 static struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc =
219 { &fifo_nfsv2nodeop_p, nfsv2_fifoop_entries };
220 VNODEOP_SET(fifo_nfsv2nodeop_opv_desc);
222 static int nfs_mknodrpc __P((struct vnode *dvp, struct vnode **vpp,
223 struct componentname *cnp,
225 static int nfs_removerpc __P((struct vnode *dvp, const char *name,
227 struct ucred *cred, struct proc *proc));
228 static int nfs_renamerpc __P((struct vnode *fdvp, const char *fnameptr,
229 int fnamelen, struct vnode *tdvp,
230 const char *tnameptr, int tnamelen,
231 struct ucred *cred, struct proc *proc));
232 static int nfs_renameit __P((struct vnode *sdvp,
233 struct componentname *scnp,
234 struct sillyrename *sp));
239 extern u_int32_t nfs_true, nfs_false;
240 extern u_int32_t nfs_xdrneg1;
241 extern struct nfsstats nfsstats;
242 extern nfstype nfsv3_type[9];
243 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
244 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON];
245 int nfs_numasync = 0;
246 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1))
248 SYSCTL_DECL(_vfs_nfs);
250 static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
251 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
252 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
254 static int nfsv3_commit_on_close = 0;
255 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
256 &nfsv3_commit_on_close, 0, "write+commit on close, else only write");
258 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
259 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
261 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
262 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
265 #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \
266 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \
267 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP)
269 nfs3_access_otw(struct vnode *vp,
276 int error = 0, attrflag;
278 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
279 caddr_t bpos, dpos, cp2;
280 register int32_t t1, t2;
283 struct nfsnode *np = VTONFS(vp);
285 nfsstats.rpccnt[NFSPROC_ACCESS]++;
286 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED);
288 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
289 *tl = txdr_unsigned(wmode);
290 nfsm_request(vp, NFSPROC_ACCESS, p, cred);
291 nfsm_postop_attr(vp, attrflag);
293 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
294 rmode = fxdr_unsigned(u_int32_t, *tl);
296 np->n_modeuid = cred->cr_uid;
297 np->n_modestamp = time_second;
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.
311 struct vop_access_args /* {
314 struct ucred *a_cred;
318 register struct vnode *vp = ap->a_vp;
320 u_int32_t mode, wmode;
321 int v3 = NFS_ISV3(vp);
322 struct nfsnode *np = VTONFS(vp);
325 * Disallow write attempts on filesystems mounted read-only;
326 * unless the file is a socket, fifo, or a block or character
327 * device resident on the filesystem.
329 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
330 switch (vp->v_type) {
340 * For nfs v3, check to see if we have done this recently, and if
341 * so return our cached result instead of making an ACCESS call.
342 * If not, do an access rpc, otherwise you are stuck emulating
343 * ufs_access() locally using the vattr. This may not be correct,
344 * since the server may apply other access criteria such as
345 * client uid-->server uid mapping that we do not know about.
348 if (ap->a_mode & VREAD)
349 mode = NFSV3ACCESS_READ;
352 if (vp->v_type != VDIR) {
353 if (ap->a_mode & VWRITE)
354 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
355 if (ap->a_mode & VEXEC)
356 mode |= NFSV3ACCESS_EXECUTE;
358 if (ap->a_mode & VWRITE)
359 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
361 if (ap->a_mode & VEXEC)
362 mode |= NFSV3ACCESS_LOOKUP;
364 /* XXX safety belt, only make blanket request if caching */
365 if (nfsaccess_cache_timeout > 0) {
366 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY |
367 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE |
368 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP;
374 * Does our cached result allow us to give a definite yes to
377 if ((time_second < (np->n_modestamp + nfsaccess_cache_timeout)) &&
378 (ap->a_cred->cr_uid == np->n_modeuid) &&
379 ((np->n_mode & mode) == mode)) {
380 nfsstats.accesscache_hits++;
383 * Either a no, or a don't know. Go to the wire.
385 nfsstats.accesscache_misses++;
386 error = nfs3_access_otw(vp, wmode, ap->a_p,ap->a_cred);
388 if ((np->n_mode & mode) != mode) {
395 if ((error = nfsspec_access(ap)) != 0)
399 * Attempt to prevent a mapped root from accessing a file
400 * which it shouldn't. We try to read a byte from the file
401 * if the user is root and the file is not zero length.
402 * After calling nfsspec_access, we should have the correct
405 if (ap->a_cred->cr_uid == 0 && (ap->a_mode & VREAD)
406 && VTONFS(vp)->n_size > 0) {
413 auio.uio_iov = &aiov;
417 auio.uio_segflg = UIO_SYSSPACE;
418 auio.uio_rw = UIO_READ;
419 auio.uio_procp = ap->a_p;
421 if (vp->v_type == VREG)
422 error = nfs_readrpc(vp, &auio, ap->a_cred);
423 else if (vp->v_type == VDIR) {
425 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
427 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
428 error = nfs_readdirrpc(vp, &auio, ap->a_cred);
430 } else if (vp->v_type == VLNK)
431 error = nfs_readlinkrpc(vp, &auio, ap->a_cred);
441 * Check to see if the type is ok
442 * and that deletion is not in progress.
443 * For paged in text files, you will need to flush the page cache
444 * if consistency is lost.
449 struct vop_open_args /* {
452 struct ucred *a_cred;
456 register struct vnode *vp = ap->a_vp;
457 struct nfsnode *np = VTONFS(vp);
458 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
462 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
464 printf("open eacces vtyp=%d\n",vp->v_type);
469 * Get a valid lease. If cached data is stale, flush it.
471 if (nmp->nm_flag & NFSMNT_NQNFS) {
472 if (NQNFS_CKINVALID(vp, np, ND_READ)) {
474 error = nqnfs_getlease(vp, ND_READ, ap->a_cred,
476 } while (error == NQNFS_EXPIRED);
479 if (np->n_lrev != np->n_brev ||
480 (np->n_flag & NQNFSNONCACHE)) {
481 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
482 ap->a_p, 1)) == EINTR)
484 np->n_brev = np->n_lrev;
488 if (np->n_flag & NMODIFIED) {
489 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
490 ap->a_p, 1)) == EINTR)
493 if (vp->v_type == VDIR)
494 np->n_direofoffset = 0;
495 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p);
498 np->n_mtime = vattr.va_mtime.tv_sec;
500 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p);
503 if (np->n_mtime != vattr.va_mtime.tv_sec) {
504 if (vp->v_type == VDIR)
505 np->n_direofoffset = 0;
506 if ((error = nfs_vinvalbuf(vp, V_SAVE,
507 ap->a_cred, ap->a_p, 1)) == EINTR)
509 np->n_mtime = vattr.va_mtime.tv_sec;
513 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0)
514 np->n_attrstamp = 0; /* For Open/Close consistency */
520 * What an NFS client should do upon close after writing is a debatable issue.
521 * Most NFS clients push delayed writes to the server upon close, basically for
523 * 1 - So that any write errors may be reported back to the client process
524 * doing the close system call. By far the two most likely errors are
525 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
526 * 2 - To put a worst case upper bound on cache inconsistency between
527 * multiple clients for the file.
528 * There is also a consistency problem for Version 2 of the protocol w.r.t.
529 * not being able to tell if other clients are writing a file concurrently,
530 * since there is no way of knowing if the changed modify time in the reply
531 * is only due to the write for this client.
532 * (NFS Version 3 provides weak cache consistency data in the reply that
533 * should be sufficient to detect and handle this case.)
535 * The current code does the following:
536 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
537 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
538 * or commit them (this satisfies 1 and 2 except for the
539 * case where the server crashes after this close but
540 * before the commit RPC, which is felt to be "good
541 * enough". Changing the last argument to nfs_flush() to
542 * a 1 would force a commit operation, if it is felt a
543 * commit is necessary now.
544 * for NQNFS - do nothing now, since 2 is dealt with via leases and
545 * 1 should be dealt with via an fsync() system call for
546 * cases where write errors are important.
551 struct vop_close_args /* {
552 struct vnodeop_desc *a_desc;
555 struct ucred *a_cred;
559 register struct vnode *vp = ap->a_vp;
560 register struct nfsnode *np = VTONFS(vp);
563 if (vp->v_type == VREG) {
564 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 &&
565 (np->n_flag & NMODIFIED)) {
568 * Under NFSv3 we have dirty buffers to dispose of. We
569 * must flush them to the NFS server. We have the option
570 * of waiting all the way through the commit rpc or just
571 * waiting for the initial write. The default is to only
572 * wait through the initial write so the data is in the
573 * server's cache, which is roughly similar to the state
574 * a standard disk subsystem leaves the file in on close().
576 * We cannot clear the NMODIFIED bit in np->n_flag due to
577 * potential races with other processes, and certainly
578 * cannot clear it if we don't commit.
580 int cm = nfsv3_commit_on_close ? 1 : 0;
581 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, cm);
582 /* np->n_flag &= ~NMODIFIED; */
584 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1);
588 if (np->n_flag & NWRITEERR) {
589 np->n_flag &= ~NWRITEERR;
597 * nfs getattr call from vfs.
601 struct vop_getattr_args /* {
604 struct ucred *a_cred;
608 register struct vnode *vp = ap->a_vp;
609 register struct nfsnode *np = VTONFS(vp);
611 register u_int32_t *tl;
612 register int32_t t1, t2;
615 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
616 int v3 = NFS_ISV3(vp);
619 * Update local times for special files.
621 if (np->n_flag & (NACC | NUPD))
624 * First look in the cache.
626 if (nfs_getattrcache(vp, ap->a_vap) == 0)
629 if (v3 && nfsaccess_cache_timeout > 0) {
630 nfsstats.accesscache_misses++;
631 nfs3_access_otw(vp, NFSV3ACCESS_ALL, ap->a_p, ap->a_cred);
632 if (nfs_getattrcache(vp, ap->a_vap) == 0)
636 nfsstats.rpccnt[NFSPROC_GETATTR]++;
637 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3));
639 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred);
641 nfsm_loadattr(vp, ap->a_vap);
652 struct vop_setattr_args /* {
653 struct vnodeop_desc *a_desc;
656 struct ucred *a_cred;
660 register struct vnode *vp = ap->a_vp;
661 register struct nfsnode *np = VTONFS(vp);
662 register struct vattr *vap = ap->a_vap;
671 * Setting of flags is not supported.
673 if (vap->va_flags != VNOVAL)
677 * Disallow write attempts if the filesystem is mounted read-only.
679 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
680 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
681 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
682 (vp->v_mount->mnt_flag & MNT_RDONLY))
684 if (vap->va_size != VNOVAL) {
685 switch (vp->v_type) {
692 if (vap->va_mtime.tv_sec == VNOVAL &&
693 vap->va_atime.tv_sec == VNOVAL &&
694 vap->va_mode == (mode_t)VNOVAL &&
695 vap->va_uid == (uid_t)VNOVAL &&
696 vap->va_gid == (gid_t)VNOVAL)
698 vap->va_size = VNOVAL;
702 * Disallow write attempts if the filesystem is
705 if (vp->v_mount->mnt_flag & MNT_RDONLY)
707 vnode_pager_setsize(vp, vap->va_size);
708 if (np->n_flag & NMODIFIED) {
709 if (vap->va_size == 0)
710 error = nfs_vinvalbuf(vp, 0,
711 ap->a_cred, ap->a_p, 1);
713 error = nfs_vinvalbuf(vp, V_SAVE,
714 ap->a_cred, ap->a_p, 1);
716 vnode_pager_setsize(vp, np->n_size);
721 np->n_size = np->n_vattr.va_size = vap->va_size;
723 } else if ((vap->va_mtime.tv_sec != VNOVAL ||
724 vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) &&
725 vp->v_type == VREG &&
726 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
727 ap->a_p, 1)) == EINTR)
729 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p);
730 if (error && vap->va_size != VNOVAL) {
731 np->n_size = np->n_vattr.va_size = tsize;
732 vnode_pager_setsize(vp, np->n_size);
738 * Do an nfs setattr rpc.
741 nfs_setattrrpc(vp, vap, cred, procp)
742 register struct vnode *vp;
743 register struct vattr *vap;
747 register struct nfsv2_sattr *sp;
749 register int32_t t1, t2;
750 caddr_t bpos, dpos, cp2;
752 int error = 0, wccflag = NFSV3_WCCRATTR;
753 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
754 int v3 = NFS_ISV3(vp);
756 nfsstats.rpccnt[NFSPROC_SETATTR]++;
757 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3));
760 nfsm_v3attrbuild(vap, TRUE);
761 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
764 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
765 if (vap->va_mode == (mode_t)VNOVAL)
766 sp->sa_mode = nfs_xdrneg1;
768 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
769 if (vap->va_uid == (uid_t)VNOVAL)
770 sp->sa_uid = nfs_xdrneg1;
772 sp->sa_uid = txdr_unsigned(vap->va_uid);
773 if (vap->va_gid == (gid_t)VNOVAL)
774 sp->sa_gid = nfs_xdrneg1;
776 sp->sa_gid = txdr_unsigned(vap->va_gid);
777 sp->sa_size = txdr_unsigned(vap->va_size);
778 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
779 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
781 nfsm_request(vp, NFSPROC_SETATTR, procp, cred);
783 nfsm_wcc_data(vp, wccflag);
785 nfsm_loadattr(vp, (struct vattr *)0);
791 * nfs lookup call, one step at a time...
792 * First look in cache
793 * If not found, unlock the directory nfsnode and do the rpc
797 struct vop_lookup_args /* {
798 struct vnodeop_desc *a_desc;
800 struct vnode **a_vpp;
801 struct componentname *a_cnp;
804 struct componentname *cnp = ap->a_cnp;
805 struct vnode *dvp = ap->a_dvp;
806 struct vnode **vpp = ap->a_vpp;
807 int flags = cnp->cn_flags;
812 struct nfsmount *nmp;
813 caddr_t bpos, dpos, cp2;
814 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
818 int lockparent, wantparent, error = 0, attrflag, fhsize;
819 int v3 = NFS_ISV3(dvp);
820 struct proc *p = cnp->cn_proc;
823 cnp->cn_flags &= ~PDIRUNLOCK;
824 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
825 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
827 if (dvp->v_type != VDIR)
829 lockparent = flags & LOCKPARENT;
830 wantparent = flags & (LOCKPARENT|WANTPARENT);
831 nmp = VFSTONFS(dvp->v_mount);
833 if ((error = cache_lookup(dvp, vpp, cnp)) && error != ENOENT) {
837 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, p)) != 0) {
845 * See the comment starting `Step through' in ufs/ufs_lookup.c
846 * for an explanation of the locking protocol
851 } else if (flags & ISDOTDOT) {
852 VOP_UNLOCK(dvp, 0, p);
853 cnp->cn_flags |= PDIRUNLOCK;
854 error = vget(newvp, LK_EXCLUSIVE, p);
855 if (!error && lockparent && (flags & ISLASTCN)) {
856 error = vn_lock(dvp, LK_EXCLUSIVE, p);
858 cnp->cn_flags &= ~PDIRUNLOCK;
861 error = vget(newvp, LK_EXCLUSIVE, p);
862 if (!lockparent || error || !(flags & ISLASTCN)) {
863 VOP_UNLOCK(dvp, 0, p);
864 cnp->cn_flags |= PDIRUNLOCK;
868 if (vpid == newvp->v_id) {
869 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, p)
870 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) {
871 nfsstats.lookupcache_hits++;
872 if (cnp->cn_nameiop != LOOKUP &&
874 cnp->cn_flags |= SAVENAME;
880 if (lockparent && dvp != newvp && (flags & ISLASTCN))
881 VOP_UNLOCK(dvp, 0, p);
883 error = vn_lock(dvp, LK_EXCLUSIVE, p);
886 cnp->cn_flags |= PDIRUNLOCK;
889 cnp->cn_flags &= ~PDIRUNLOCK;
893 nfsstats.lookupcache_misses++;
894 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
895 len = cnp->cn_namelen;
896 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
897 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
899 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
900 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred);
902 nfsm_postop_attr(dvp, attrflag);
906 nfsm_getfh(fhp, fhsize, v3);
909 * Handle RENAME case...
911 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) {
912 if (NFS_CMPFH(np, fhp, fhsize)) {
916 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
923 nfsm_postop_attr(newvp, attrflag);
924 nfsm_postop_attr(dvp, attrflag);
926 nfsm_loadattr(newvp, (struct vattr *)0);
929 cnp->cn_flags |= SAVENAME;
931 VOP_UNLOCK(dvp, 0, p);
932 cnp->cn_flags |= PDIRUNLOCK;
937 if (flags & ISDOTDOT) {
938 VOP_UNLOCK(dvp, 0, p);
939 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
941 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, p);
945 if (lockparent && (flags & ISLASTCN)) {
946 error = vn_lock(dvp, LK_EXCLUSIVE, p);
948 cnp->cn_flags |= PDIRUNLOCK;
953 cnp->cn_flags |= PDIRUNLOCK;
954 } else if (NFS_CMPFH(np, fhp, fhsize)) {
958 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
963 if (!lockparent || !(flags & ISLASTCN)) {
964 cnp->cn_flags |= PDIRUNLOCK;
965 VOP_UNLOCK(dvp, 0, p);
970 nfsm_postop_attr(newvp, attrflag);
971 nfsm_postop_attr(dvp, attrflag);
973 nfsm_loadattr(newvp, (struct vattr *)0);
974 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
975 cnp->cn_flags |= SAVENAME;
976 if ((cnp->cn_flags & MAKEENTRY) &&
977 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) {
978 np->n_ctime = np->n_vattr.va_ctime.tv_sec;
979 cache_enter(dvp, newvp, cnp);
984 if (newvp != NULLVP) {
988 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
989 (flags & ISLASTCN) && error == ENOENT) {
991 VOP_UNLOCK(dvp, 0, p);
992 cnp->cn_flags |= PDIRUNLOCK;
994 if (dvp->v_mount->mnt_flag & MNT_RDONLY)
999 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
1000 cnp->cn_flags |= SAVENAME;
1007 * Just call nfs_bioread() to do the work.
1011 struct vop_read_args /* {
1015 struct ucred *a_cred;
1018 register struct vnode *vp = ap->a_vp;
1020 if (vp->v_type != VREG)
1022 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
1030 struct vop_readlink_args /* {
1033 struct ucred *a_cred;
1036 register struct vnode *vp = ap->a_vp;
1038 if (vp->v_type != VLNK)
1040 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred));
1044 * Do a readlink rpc.
1045 * Called by nfs_doio() from below the buffer cache.
1048 nfs_readlinkrpc(vp, uiop, cred)
1049 register struct vnode *vp;
1053 register u_int32_t *tl;
1054 register caddr_t cp;
1055 register int32_t t1, t2;
1056 caddr_t bpos, dpos, cp2;
1057 int error = 0, len, attrflag;
1058 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1059 int v3 = NFS_ISV3(vp);
1061 nfsstats.rpccnt[NFSPROC_READLINK]++;
1062 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3));
1064 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred);
1066 nfsm_postop_attr(vp, attrflag);
1068 nfsm_strsiz(len, NFS_MAXPATHLEN);
1069 if (len == NFS_MAXPATHLEN) {
1070 struct nfsnode *np = VTONFS(vp);
1071 if (np->n_size && np->n_size < NFS_MAXPATHLEN)
1074 nfsm_mtouio(uiop, len);
1085 nfs_readrpc(vp, uiop, cred)
1086 register struct vnode *vp;
1090 register u_int32_t *tl;
1091 register caddr_t cp;
1092 register int32_t t1, t2;
1093 caddr_t bpos, dpos, cp2;
1094 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1095 struct nfsmount *nmp;
1096 int error = 0, len, retlen, tsiz, eof, attrflag;
1097 int v3 = NFS_ISV3(vp);
1102 nmp = VFSTONFS(vp->v_mount);
1103 tsiz = uiop->uio_resid;
1104 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1107 nfsstats.rpccnt[NFSPROC_READ]++;
1108 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
1109 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3);
1111 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3);
1113 txdr_hyper(uiop->uio_offset, tl);
1114 *(tl + 2) = txdr_unsigned(len);
1116 *tl++ = txdr_unsigned(uiop->uio_offset);
1117 *tl++ = txdr_unsigned(len);
1120 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, cred);
1122 nfsm_postop_attr(vp, attrflag);
1127 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1128 eof = fxdr_unsigned(int, *(tl + 1));
1130 nfsm_loadattr(vp, (struct vattr *)0);
1131 nfsm_strsiz(retlen, nmp->nm_rsize);
1132 nfsm_mtouio(uiop, retlen);
1136 if (eof || retlen == 0)
1138 } else if (retlen < len)
1149 nfs_writerpc(vp, uiop, cred, iomode, must_commit)
1150 register struct vnode *vp;
1151 register struct uio *uiop;
1153 int *iomode, *must_commit;
1155 register u_int32_t *tl;
1156 register caddr_t cp;
1157 register int32_t t1, t2, backup;
1158 caddr_t bpos, dpos, cp2;
1159 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1160 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1161 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
1162 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC;
1165 if (uiop->uio_iovcnt != 1)
1166 panic("nfs: writerpc iovcnt > 1");
1169 tsiz = uiop->uio_resid;
1170 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1173 nfsstats.rpccnt[NFSPROC_WRITE]++;
1174 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1175 nfsm_reqhead(vp, NFSPROC_WRITE,
1176 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len));
1179 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
1180 txdr_hyper(uiop->uio_offset, tl);
1182 *tl++ = txdr_unsigned(len);
1183 *tl++ = txdr_unsigned(*iomode);
1184 *tl = txdr_unsigned(len);
1186 register u_int32_t x;
1188 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1189 /* Set both "begin" and "current" to non-garbage. */
1190 x = txdr_unsigned((u_int32_t)uiop->uio_offset);
1191 *tl++ = x; /* "begin offset" */
1192 *tl++ = x; /* "current offset" */
1193 x = txdr_unsigned(len);
1194 *tl++ = x; /* total to this offset */
1195 *tl = x; /* size of this write */
1197 nfsm_uiotom(uiop, len);
1198 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred);
1200 wccflag = NFSV3_WCCCHK;
1201 nfsm_wcc_data(vp, wccflag);
1203 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
1204 + NFSX_V3WRITEVERF);
1205 rlen = fxdr_unsigned(int, *tl++);
1210 } else if (rlen < len) {
1211 backup = len - rlen;
1212 uiop->uio_iov->iov_base -= backup;
1213 uiop->uio_iov->iov_len += backup;
1214 uiop->uio_offset -= backup;
1215 uiop->uio_resid += backup;
1218 commit = fxdr_unsigned(int, *tl++);
1221 * Return the lowest committment level
1222 * obtained by any of the RPCs.
1224 if (committed == NFSV3WRITE_FILESYNC)
1226 else if (committed == NFSV3WRITE_DATASYNC &&
1227 commit == NFSV3WRITE_UNSTABLE)
1229 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){
1230 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1232 nmp->nm_state |= NFSSTA_HASWRITEVERF;
1233 } else if (bcmp((caddr_t)tl,
1234 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1236 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1241 nfsm_loadattr(vp, (struct vattr *)0);
1243 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec;
1250 if (vp->v_mount->mnt_flag & MNT_ASYNC)
1251 committed = NFSV3WRITE_FILESYNC;
1252 *iomode = committed;
1254 uiop->uio_resid = tsiz;
1260 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1261 * mode set to specify the file type and the size field for rdev.
1264 nfs_mknodrpc(dvp, vpp, cnp, vap)
1265 register struct vnode *dvp;
1266 register struct vnode **vpp;
1267 register struct componentname *cnp;
1268 register struct vattr *vap;
1270 register struct nfsv2_sattr *sp;
1271 register u_int32_t *tl;
1272 register caddr_t cp;
1273 register int32_t t1, t2;
1274 struct vnode *newvp = (struct vnode *)0;
1275 struct nfsnode *np = (struct nfsnode *)0;
1279 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
1280 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1282 int v3 = NFS_ISV3(dvp);
1284 if (vap->va_type == VCHR || vap->va_type == VBLK)
1285 rdev = txdr_unsigned(vap->va_rdev);
1286 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1289 return (EOPNOTSUPP);
1291 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) != 0) {
1294 nfsstats.rpccnt[NFSPROC_MKNOD]++;
1295 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED +
1296 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1297 nfsm_fhtom(dvp, v3);
1298 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1300 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1301 *tl++ = vtonfsv3_type(vap->va_type);
1302 nfsm_v3attrbuild(vap, FALSE);
1303 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1304 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1305 *tl++ = txdr_unsigned(umajor(vap->va_rdev));
1306 *tl = txdr_unsigned(uminor(vap->va_rdev));
1309 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1310 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1311 sp->sa_uid = nfs_xdrneg1;
1312 sp->sa_gid = nfs_xdrneg1;
1314 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1315 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1317 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred);
1319 nfsm_mtofh(dvp, newvp, v3, gotvp);
1323 newvp = (struct vnode *)0;
1325 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1326 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np);
1332 nfsm_wcc_data(dvp, wccflag);
1338 if (cnp->cn_flags & MAKEENTRY)
1339 cache_enter(dvp, newvp, cnp);
1342 VTONFS(dvp)->n_flag |= NMODIFIED;
1344 VTONFS(dvp)->n_attrstamp = 0;
1350 * just call nfs_mknodrpc() to do the work.
1355 struct vop_mknod_args /* {
1356 struct vnode *a_dvp;
1357 struct vnode **a_vpp;
1358 struct componentname *a_cnp;
1359 struct vattr *a_vap;
1362 return nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1365 static u_long create_verf;
1367 * nfs file create call
1371 struct vop_create_args /* {
1372 struct vnode *a_dvp;
1373 struct vnode **a_vpp;
1374 struct componentname *a_cnp;
1375 struct vattr *a_vap;
1378 register struct vnode *dvp = ap->a_dvp;
1379 register struct vattr *vap = ap->a_vap;
1380 register struct componentname *cnp = ap->a_cnp;
1381 register struct nfsv2_sattr *sp;
1382 register u_int32_t *tl;
1383 register caddr_t cp;
1384 register int32_t t1, t2;
1385 struct nfsnode *np = (struct nfsnode *)0;
1386 struct vnode *newvp = (struct vnode *)0;
1387 caddr_t bpos, dpos, cp2;
1388 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
1389 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1391 int v3 = NFS_ISV3(dvp);
1394 * Oops, not for me..
1396 if (vap->va_type == VSOCK)
1397 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1399 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) != 0) {
1402 if (vap->va_vaflags & VA_EXCLUSIVE)
1405 nfsstats.rpccnt[NFSPROC_CREATE]++;
1406 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED +
1407 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1408 nfsm_fhtom(dvp, v3);
1409 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1411 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1412 if (fmode & O_EXCL) {
1413 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
1414 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF);
1416 if (!TAILQ_EMPTY(&in_ifaddrhead))
1417 *tl++ = IA_SIN(in_ifaddrhead.tqh_first)->sin_addr.s_addr;
1420 *tl++ = create_verf;
1421 *tl = ++create_verf;
1423 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
1424 nfsm_v3attrbuild(vap, FALSE);
1427 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1428 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1429 sp->sa_uid = nfs_xdrneg1;
1430 sp->sa_gid = nfs_xdrneg1;
1432 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1433 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1435 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred);
1437 nfsm_mtofh(dvp, newvp, v3, gotvp);
1441 newvp = (struct vnode *)0;
1443 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1444 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np);
1450 nfsm_wcc_data(dvp, wccflag);
1453 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
1459 } else if (v3 && (fmode & O_EXCL)) {
1461 * We are normally called with only a partially initialized
1462 * VAP. Since the NFSv3 spec says that server may use the
1463 * file attributes to store the verifier, the spec requires
1464 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1465 * in atime, but we can't really assume that all servers will
1466 * so we ensure that our SETATTR sets both atime and mtime.
1468 if (vap->va_mtime.tv_sec == VNOVAL)
1469 vfs_timestamp(&vap->va_mtime);
1470 if (vap->va_atime.tv_sec == VNOVAL)
1471 vap->va_atime = vap->va_mtime;
1472 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc);
1475 if (cnp->cn_flags & MAKEENTRY)
1476 cache_enter(dvp, newvp, cnp);
1479 VTONFS(dvp)->n_flag |= NMODIFIED;
1481 VTONFS(dvp)->n_attrstamp = 0;
1486 * nfs file remove call
1487 * To try and make nfs semantics closer to ufs semantics, a file that has
1488 * other processes using the vnode is renamed instead of removed and then
1489 * removed later on the last close.
1490 * - If v_usecount > 1
1491 * If a rename is not already in the works
1492 * call nfs_sillyrename() to set it up
1498 struct vop_remove_args /* {
1499 struct vnodeop_desc *a_desc;
1500 struct vnode * a_dvp;
1501 struct vnode * a_vp;
1502 struct componentname * a_cnp;
1505 register struct vnode *vp = ap->a_vp;
1506 register struct vnode *dvp = ap->a_dvp;
1507 register struct componentname *cnp = ap->a_cnp;
1508 register struct nfsnode *np = VTONFS(vp);
1513 if ((cnp->cn_flags & HASBUF) == 0)
1514 panic("nfs_remove: no name");
1515 if (vp->v_usecount < 1)
1516 panic("nfs_remove: bad v_usecount");
1518 if (vp->v_type == VDIR)
1520 else if (vp->v_usecount == 1 || (np->n_sillyrename &&
1521 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 &&
1522 vattr.va_nlink > 1)) {
1524 * Purge the name cache so that the chance of a lookup for
1525 * the name succeeding while the remove is in progress is
1526 * minimized. Without node locking it can still happen, such
1527 * that an I/O op returns ESTALE, but since you get this if
1528 * another host removes the file..
1532 * throw away biocache buffers, mainly to avoid
1533 * unnecessary delayed writes later.
1535 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1);
1538 error = nfs_removerpc(dvp, cnp->cn_nameptr,
1539 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc);
1541 * Kludge City: If the first reply to the remove rpc is lost..
1542 * the reply to the retransmitted request will be ENOENT
1543 * since the file was in fact removed
1544 * Therefore, we cheat and return success.
1546 if (error == ENOENT)
1548 } else if (!np->n_sillyrename)
1549 error = nfs_sillyrename(dvp, vp, cnp);
1550 np->n_attrstamp = 0;
1555 * nfs file remove rpc called from nfs_inactive
1559 register struct sillyrename *sp;
1562 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred,
1567 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1570 nfs_removerpc(dvp, name, namelen, cred, proc)
1571 register struct vnode *dvp;
1577 register u_int32_t *tl;
1578 register caddr_t cp;
1579 register int32_t t1, t2;
1580 caddr_t bpos, dpos, cp2;
1581 int error = 0, wccflag = NFSV3_WCCRATTR;
1582 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1583 int v3 = NFS_ISV3(dvp);
1585 nfsstats.rpccnt[NFSPROC_REMOVE]++;
1586 nfsm_reqhead(dvp, NFSPROC_REMOVE,
1587 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1588 nfsm_fhtom(dvp, v3);
1589 nfsm_strtom(name, namelen, NFS_MAXNAMLEN);
1590 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred);
1592 nfsm_wcc_data(dvp, wccflag);
1594 VTONFS(dvp)->n_flag |= NMODIFIED;
1596 VTONFS(dvp)->n_attrstamp = 0;
1601 * nfs file rename call
1605 struct vop_rename_args /* {
1606 struct vnode *a_fdvp;
1607 struct vnode *a_fvp;
1608 struct componentname *a_fcnp;
1609 struct vnode *a_tdvp;
1610 struct vnode *a_tvp;
1611 struct componentname *a_tcnp;
1614 register struct vnode *fvp = ap->a_fvp;
1615 register struct vnode *tvp = ap->a_tvp;
1616 register struct vnode *fdvp = ap->a_fdvp;
1617 register struct vnode *tdvp = ap->a_tdvp;
1618 register struct componentname *tcnp = ap->a_tcnp;
1619 register struct componentname *fcnp = ap->a_fcnp;
1623 if ((tcnp->cn_flags & HASBUF) == 0 ||
1624 (fcnp->cn_flags & HASBUF) == 0)
1625 panic("nfs_rename: no name");
1627 /* Check for cross-device rename */
1628 if ((fvp->v_mount != tdvp->v_mount) ||
1629 (tvp && (fvp->v_mount != tvp->v_mount))) {
1635 * We have to flush B_DELWRI data prior to renaming
1636 * the file. If we don't, the delayed-write buffers
1637 * can be flushed out later after the file has gone stale
1638 * under NFSV3. NFSV2 does not have this problem because
1639 * ( as far as I can tell ) it flushes dirty buffers more
1643 VOP_FSYNC(fvp, fcnp->cn_cred, MNT_WAIT, fcnp->cn_proc);
1645 VOP_FSYNC(tvp, tcnp->cn_cred, MNT_WAIT, tcnp->cn_proc);
1648 * If the tvp exists and is in use, sillyrename it before doing the
1649 * rename of the new file over it.
1650 * XXX Can't sillyrename a directory.
1652 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename &&
1653 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1658 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1659 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1662 if (fvp->v_type == VDIR) {
1663 if (tvp != NULL && tvp->v_type == VDIR)
1678 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1680 if (error == ENOENT)
1686 * nfs file rename rpc called from nfs_remove() above
1689 nfs_renameit(sdvp, scnp, sp)
1691 struct componentname *scnp;
1692 register struct sillyrename *sp;
1694 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
1695 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc));
1699 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1702 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc)
1703 register struct vnode *fdvp;
1704 const char *fnameptr;
1706 register struct vnode *tdvp;
1707 const char *tnameptr;
1712 register u_int32_t *tl;
1713 register caddr_t cp;
1714 register int32_t t1, t2;
1715 caddr_t bpos, dpos, cp2;
1716 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
1717 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1718 int v3 = NFS_ISV3(fdvp);
1720 nfsstats.rpccnt[NFSPROC_RENAME]++;
1721 nfsm_reqhead(fdvp, NFSPROC_RENAME,
1722 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) +
1723 nfsm_rndup(tnamelen));
1724 nfsm_fhtom(fdvp, v3);
1725 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN);
1726 nfsm_fhtom(tdvp, v3);
1727 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN);
1728 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred);
1730 nfsm_wcc_data(fdvp, fwccflag);
1731 nfsm_wcc_data(tdvp, twccflag);
1734 VTONFS(fdvp)->n_flag |= NMODIFIED;
1735 VTONFS(tdvp)->n_flag |= NMODIFIED;
1737 VTONFS(fdvp)->n_attrstamp = 0;
1739 VTONFS(tdvp)->n_attrstamp = 0;
1744 * nfs hard link create call
1748 struct vop_link_args /* {
1749 struct vnode *a_tdvp;
1751 struct componentname *a_cnp;
1754 register struct vnode *vp = ap->a_vp;
1755 register struct vnode *tdvp = ap->a_tdvp;
1756 register struct componentname *cnp = ap->a_cnp;
1757 register u_int32_t *tl;
1758 register caddr_t cp;
1759 register int32_t t1, t2;
1760 caddr_t bpos, dpos, cp2;
1761 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
1762 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1765 if (vp->v_mount != tdvp->v_mount) {
1770 * Push all writes to the server, so that the attribute cache
1771 * doesn't get "out of sync" with the server.
1772 * XXX There should be a better way!
1774 VOP_FSYNC(vp, cnp->cn_cred, MNT_WAIT, cnp->cn_proc);
1777 nfsstats.rpccnt[NFSPROC_LINK]++;
1778 nfsm_reqhead(vp, NFSPROC_LINK,
1779 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
1781 nfsm_fhtom(tdvp, v3);
1782 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1783 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred);
1785 nfsm_postop_attr(vp, attrflag);
1786 nfsm_wcc_data(tdvp, wccflag);
1789 VTONFS(tdvp)->n_flag |= NMODIFIED;
1791 VTONFS(vp)->n_attrstamp = 0;
1793 VTONFS(tdvp)->n_attrstamp = 0;
1795 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1797 if (error == EEXIST)
1803 * nfs symbolic link create call
1807 struct vop_symlink_args /* {
1808 struct vnode *a_dvp;
1809 struct vnode **a_vpp;
1810 struct componentname *a_cnp;
1811 struct vattr *a_vap;
1815 register struct vnode *dvp = ap->a_dvp;
1816 register struct vattr *vap = ap->a_vap;
1817 register struct componentname *cnp = ap->a_cnp;
1818 register struct nfsv2_sattr *sp;
1819 register u_int32_t *tl;
1820 register caddr_t cp;
1821 register int32_t t1, t2;
1822 caddr_t bpos, dpos, cp2;
1823 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
1824 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1825 struct vnode *newvp = (struct vnode *)0;
1826 int v3 = NFS_ISV3(dvp);
1828 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1829 slen = strlen(ap->a_target);
1830 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED +
1831 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3));
1832 nfsm_fhtom(dvp, v3);
1833 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1835 nfsm_v3attrbuild(vap, FALSE);
1837 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
1839 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1840 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
1841 sp->sa_uid = nfs_xdrneg1;
1842 sp->sa_gid = nfs_xdrneg1;
1843 sp->sa_size = nfs_xdrneg1;
1844 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1845 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1849 * Issue the NFS request and get the rpc response.
1851 * Only NFSv3 responses returning an error of 0 actually return
1852 * a file handle that can be converted into newvp without having
1853 * to do an extra lookup rpc.
1855 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred);
1858 nfsm_mtofh(dvp, newvp, v3, gotvp);
1859 nfsm_wcc_data(dvp, wccflag);
1863 * out code jumps -> here, mrep is also freed.
1869 * If we get an EEXIST error, silently convert it to no-error
1870 * in case of an NFS retry.
1872 if (error == EEXIST)
1876 * If we do not have (or no longer have) an error, and we could
1877 * not extract the newvp from the response due to the request being
1878 * NFSv2 or the error being EEXIST. We have to do a lookup in order
1879 * to obtain a newvp to return.
1881 if (error == 0 && newvp == NULL) {
1882 struct nfsnode *np = NULL;
1884 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1885 cnp->cn_cred, cnp->cn_proc, &np);
1895 VTONFS(dvp)->n_flag |= NMODIFIED;
1897 VTONFS(dvp)->n_attrstamp = 0;
1906 struct vop_mkdir_args /* {
1907 struct vnode *a_dvp;
1908 struct vnode **a_vpp;
1909 struct componentname *a_cnp;
1910 struct vattr *a_vap;
1913 register struct vnode *dvp = ap->a_dvp;
1914 register struct vattr *vap = ap->a_vap;
1915 register struct componentname *cnp = ap->a_cnp;
1916 register struct nfsv2_sattr *sp;
1917 register u_int32_t *tl;
1918 register caddr_t cp;
1919 register int32_t t1, t2;
1921 struct nfsnode *np = (struct nfsnode *)0;
1922 struct vnode *newvp = (struct vnode *)0;
1923 caddr_t bpos, dpos, cp2;
1924 int error = 0, wccflag = NFSV3_WCCRATTR;
1926 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1928 int v3 = NFS_ISV3(dvp);
1930 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) != 0) {
1933 len = cnp->cn_namelen;
1934 nfsstats.rpccnt[NFSPROC_MKDIR]++;
1935 nfsm_reqhead(dvp, NFSPROC_MKDIR,
1936 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3));
1937 nfsm_fhtom(dvp, v3);
1938 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
1940 nfsm_v3attrbuild(vap, FALSE);
1942 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1943 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
1944 sp->sa_uid = nfs_xdrneg1;
1945 sp->sa_gid = nfs_xdrneg1;
1946 sp->sa_size = nfs_xdrneg1;
1947 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1948 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1950 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred);
1952 nfsm_mtofh(dvp, newvp, v3, gotvp);
1954 nfsm_wcc_data(dvp, wccflag);
1956 VTONFS(dvp)->n_flag |= NMODIFIED;
1958 VTONFS(dvp)->n_attrstamp = 0;
1960 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
1961 * if we can succeed in looking up the directory.
1963 if (error == EEXIST || (!error && !gotvp)) {
1966 newvp = (struct vnode *)0;
1968 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
1972 if (newvp->v_type != VDIR)
1985 * nfs remove directory call
1989 struct vop_rmdir_args /* {
1990 struct vnode *a_dvp;
1992 struct componentname *a_cnp;
1995 register struct vnode *vp = ap->a_vp;
1996 register struct vnode *dvp = ap->a_dvp;
1997 register struct componentname *cnp = ap->a_cnp;
1998 register u_int32_t *tl;
1999 register caddr_t cp;
2000 register int32_t t1, t2;
2001 caddr_t bpos, dpos, cp2;
2002 int error = 0, wccflag = NFSV3_WCCRATTR;
2003 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2004 int v3 = NFS_ISV3(dvp);
2008 nfsstats.rpccnt[NFSPROC_RMDIR]++;
2009 nfsm_reqhead(dvp, NFSPROC_RMDIR,
2010 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
2011 nfsm_fhtom(dvp, v3);
2012 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
2013 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred);
2015 nfsm_wcc_data(dvp, wccflag);
2017 VTONFS(dvp)->n_flag |= NMODIFIED;
2019 VTONFS(dvp)->n_attrstamp = 0;
2023 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2025 if (error == ENOENT)
2035 struct vop_readdir_args /* {
2038 struct ucred *a_cred;
2041 register struct vnode *vp = ap->a_vp;
2042 register struct nfsnode *np = VTONFS(vp);
2043 register struct uio *uio = ap->a_uio;
2047 if (vp->v_type != VDIR)
2050 * First, check for hit on the EOF offset cache
2052 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2053 (np->n_flag & NMODIFIED) == 0) {
2054 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) {
2055 if (NQNFS_CKCACHABLE(vp, ND_READ)) {
2056 nfsstats.direofcache_hits++;
2059 } else if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_procp) == 0 &&
2060 np->n_mtime == vattr.va_mtime.tv_sec) {
2061 nfsstats.direofcache_hits++;
2067 * Call nfs_bioread() to do the real work.
2069 tresid = uio->uio_resid;
2070 error = nfs_bioread(vp, uio, 0, ap->a_cred);
2072 if (!error && uio->uio_resid == tresid)
2073 nfsstats.direofcache_misses++;
2079 * Called from below the buffer cache by nfs_doio().
2082 nfs_readdirrpc(vp, uiop, cred)
2084 register struct uio *uiop;
2088 register int len, left;
2089 register struct dirent *dp = NULL;
2090 register u_int32_t *tl;
2091 register caddr_t cp;
2092 register int32_t t1, t2;
2093 register nfsuint64 *cookiep;
2094 caddr_t bpos, dpos, cp2;
2095 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2097 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2098 struct nfsnode *dnp = VTONFS(vp);
2100 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2102 int v3 = NFS_ISV3(vp);
2105 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2106 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2107 panic("nfs readdirrpc bad uio");
2111 * If there is no cookie, assume directory was stale.
2113 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2117 return (NFSERR_BAD_COOKIE);
2119 * Loop around doing readdir rpc's of size nm_readdirsize
2120 * truncated to a multiple of DIRBLKSIZ.
2121 * The stopping criteria is EOF or buffer full.
2123 while (more_dirs && bigenough) {
2124 nfsstats.rpccnt[NFSPROC_READDIR]++;
2125 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) +
2129 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
2130 *tl++ = cookie.nfsuquad[0];
2131 *tl++ = cookie.nfsuquad[1];
2132 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2133 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2135 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2136 *tl++ = cookie.nfsuquad[0];
2138 *tl = txdr_unsigned(nmp->nm_readdirsize);
2139 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred);
2141 nfsm_postop_attr(vp, attrflag);
2143 nfsm_dissect(tl, u_int32_t *,
2145 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2146 dnp->n_cookieverf.nfsuquad[1] = *tl;
2152 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2153 more_dirs = fxdr_unsigned(int, *tl);
2155 /* loop thru the dir entries, doctoring them to 4bsd form */
2156 while (more_dirs && bigenough) {
2158 nfsm_dissect(tl, u_int32_t *,
2160 fileno = fxdr_hyper(tl);
2161 len = fxdr_unsigned(int, *(tl + 2));
2163 nfsm_dissect(tl, u_int32_t *,
2165 fileno = fxdr_unsigned(u_quad_t, *tl++);
2166 len = fxdr_unsigned(int, *tl);
2168 if (len <= 0 || len > NFS_MAXNAMLEN) {
2173 tlen = nfsm_rndup(len);
2175 tlen += 4; /* To ensure null termination */
2176 left = DIRBLKSIZ - blksiz;
2177 if ((tlen + DIRHDSIZ) > left) {
2178 dp->d_reclen += left;
2179 uiop->uio_iov->iov_base += left;
2180 uiop->uio_iov->iov_len -= left;
2181 uiop->uio_offset += left;
2182 uiop->uio_resid -= left;
2185 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2188 dp = (struct dirent *)uiop->uio_iov->iov_base;
2189 dp->d_fileno = (int)fileno;
2191 dp->d_reclen = tlen + DIRHDSIZ;
2192 dp->d_type = DT_UNKNOWN;
2193 blksiz += dp->d_reclen;
2194 if (blksiz == DIRBLKSIZ)
2196 uiop->uio_offset += DIRHDSIZ;
2197 uiop->uio_resid -= DIRHDSIZ;
2198 uiop->uio_iov->iov_base += DIRHDSIZ;
2199 uiop->uio_iov->iov_len -= DIRHDSIZ;
2200 nfsm_mtouio(uiop, len);
2201 cp = uiop->uio_iov->iov_base;
2203 *cp = '\0'; /* null terminate */
2204 uiop->uio_iov->iov_base += tlen;
2205 uiop->uio_iov->iov_len -= tlen;
2206 uiop->uio_offset += tlen;
2207 uiop->uio_resid -= tlen;
2209 nfsm_adv(nfsm_rndup(len));
2211 nfsm_dissect(tl, u_int32_t *,
2214 nfsm_dissect(tl, u_int32_t *,
2218 cookie.nfsuquad[0] = *tl++;
2220 cookie.nfsuquad[1] = *tl++;
2225 more_dirs = fxdr_unsigned(int, *tl);
2228 * If at end of rpc data, get the eof boolean
2231 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2232 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2237 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2238 * by increasing d_reclen for the last record.
2241 left = DIRBLKSIZ - blksiz;
2242 dp->d_reclen += left;
2243 uiop->uio_iov->iov_base += left;
2244 uiop->uio_iov->iov_len -= left;
2245 uiop->uio_offset += left;
2246 uiop->uio_resid -= left;
2250 * We are now either at the end of the directory or have filled the
2254 dnp->n_direofoffset = uiop->uio_offset;
2256 if (uiop->uio_resid > 0)
2257 printf("EEK! readdirrpc resid > 0\n");
2258 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2266 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2269 nfs_readdirplusrpc(vp, uiop, cred)
2271 register struct uio *uiop;
2274 register int len, left;
2275 register struct dirent *dp;
2276 register u_int32_t *tl;
2277 register caddr_t cp;
2278 register int32_t t1, t2;
2279 register struct vnode *newvp;
2280 register nfsuint64 *cookiep;
2281 caddr_t bpos, dpos, cp2, dpossav1, dpossav2;
2282 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2;
2283 struct nameidata nami, *ndp = &nami;
2284 struct componentname *cnp = &ndp->ni_cnd;
2286 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2287 struct nfsnode *dnp = VTONFS(vp), *np;
2290 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2291 int attrflag, fhsize;
2294 dp = (struct dirent *)0;
2297 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2298 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2299 panic("nfs readdirplusrpc bad uio");
2305 * If there is no cookie, assume directory was stale.
2307 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2311 return (NFSERR_BAD_COOKIE);
2313 * Loop around doing readdir rpc's of size nm_readdirsize
2314 * truncated to a multiple of DIRBLKSIZ.
2315 * The stopping criteria is EOF or buffer full.
2317 while (more_dirs && bigenough) {
2318 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
2319 nfsm_reqhead(vp, NFSPROC_READDIRPLUS,
2320 NFSX_FH(1) + 6 * NFSX_UNSIGNED);
2322 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
2323 *tl++ = cookie.nfsuquad[0];
2324 *tl++ = cookie.nfsuquad[1];
2325 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2326 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2327 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2328 *tl = txdr_unsigned(nmp->nm_rsize);
2329 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred);
2330 nfsm_postop_attr(vp, attrflag);
2335 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2336 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2337 dnp->n_cookieverf.nfsuquad[1] = *tl++;
2338 more_dirs = fxdr_unsigned(int, *tl);
2340 /* loop thru the dir entries, doctoring them to 4bsd form */
2341 while (more_dirs && bigenough) {
2342 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2343 fileno = fxdr_hyper(tl);
2344 len = fxdr_unsigned(int, *(tl + 2));
2345 if (len <= 0 || len > NFS_MAXNAMLEN) {
2350 tlen = nfsm_rndup(len);
2352 tlen += 4; /* To ensure null termination*/
2353 left = DIRBLKSIZ - blksiz;
2354 if ((tlen + DIRHDSIZ) > left) {
2355 dp->d_reclen += left;
2356 uiop->uio_iov->iov_base += left;
2357 uiop->uio_iov->iov_len -= left;
2358 uiop->uio_offset += left;
2359 uiop->uio_resid -= left;
2362 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2365 dp = (struct dirent *)uiop->uio_iov->iov_base;
2366 dp->d_fileno = (int)fileno;
2368 dp->d_reclen = tlen + DIRHDSIZ;
2369 dp->d_type = DT_UNKNOWN;
2370 blksiz += dp->d_reclen;
2371 if (blksiz == DIRBLKSIZ)
2373 uiop->uio_offset += DIRHDSIZ;
2374 uiop->uio_resid -= DIRHDSIZ;
2375 uiop->uio_iov->iov_base += DIRHDSIZ;
2376 uiop->uio_iov->iov_len -= DIRHDSIZ;
2377 cnp->cn_nameptr = uiop->uio_iov->iov_base;
2378 cnp->cn_namelen = len;
2379 nfsm_mtouio(uiop, len);
2380 cp = uiop->uio_iov->iov_base;
2383 uiop->uio_iov->iov_base += tlen;
2384 uiop->uio_iov->iov_len -= tlen;
2385 uiop->uio_offset += tlen;
2386 uiop->uio_resid -= tlen;
2388 nfsm_adv(nfsm_rndup(len));
2389 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2391 cookie.nfsuquad[0] = *tl++;
2392 cookie.nfsuquad[1] = *tl++;
2397 * Since the attributes are before the file handle
2398 * (sigh), we must skip over the attributes and then
2399 * come back and get them.
2401 attrflag = fxdr_unsigned(int, *tl);
2405 nfsm_adv(NFSX_V3FATTR);
2406 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2407 doit = fxdr_unsigned(int, *tl);
2409 nfsm_getfh(fhp, fhsize, 1);
2410 if (NFS_CMPFH(dnp, fhp, fhsize)) {
2415 error = nfs_nget(vp->v_mount, fhp,
2423 if (doit && bigenough) {
2428 nfsm_loadattr(newvp, (struct vattr *)0);
2432 IFTODT(VTTOIF(np->n_vattr.va_type));
2434 cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp);
2437 /* Just skip over the file handle */
2438 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2439 i = fxdr_unsigned(int, *tl);
2440 nfsm_adv(nfsm_rndup(i));
2442 if (newvp != NULLVP) {
2449 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2450 more_dirs = fxdr_unsigned(int, *tl);
2453 * If at end of rpc data, get the eof boolean
2456 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2457 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2462 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2463 * by increasing d_reclen for the last record.
2466 left = DIRBLKSIZ - blksiz;
2467 dp->d_reclen += left;
2468 uiop->uio_iov->iov_base += left;
2469 uiop->uio_iov->iov_len -= left;
2470 uiop->uio_offset += left;
2471 uiop->uio_resid -= left;
2475 * We are now either at the end of the directory or have filled the
2479 dnp->n_direofoffset = uiop->uio_offset;
2481 if (uiop->uio_resid > 0)
2482 printf("EEK! readdirplusrpc resid > 0\n");
2483 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2487 if (newvp != NULLVP) {
2498 * Silly rename. To make the NFS filesystem that is stateless look a little
2499 * more like the "ufs" a remove of an active vnode is translated to a rename
2500 * to a funny looking filename that is removed by nfs_inactive on the
2501 * nfsnode. There is the potential for another process on a different client
2502 * to create the same funny name between the nfs_lookitup() fails and the
2503 * nfs_rename() completes, but...
2506 nfs_sillyrename(dvp, vp, cnp)
2507 struct vnode *dvp, *vp;
2508 struct componentname *cnp;
2510 register struct sillyrename *sp;
2518 if (vp->v_type == VDIR)
2519 panic("nfs: sillyrename dir");
2521 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2522 M_NFSREQ, M_WAITOK);
2523 sp->s_cred = crdup(cnp->cn_cred);
2527 /* Fudge together a funny name */
2528 pid = cnp->cn_proc->p_pid;
2529 sp->s_namlen = sprintf(sp->s_name, ".nfsA%04x4.4", pid);
2531 /* Try lookitups until we get one that isn't there */
2532 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2533 cnp->cn_proc, (struct nfsnode **)0) == 0) {
2535 if (sp->s_name[4] > 'z') {
2540 error = nfs_renameit(dvp, cnp, sp);
2543 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2545 np->n_sillyrename = sp;
2550 free((caddr_t)sp, M_NFSREQ);
2555 * Look up a file name and optionally either update the file handle or
2556 * allocate an nfsnode, depending on the value of npp.
2557 * npp == NULL --> just do the lookup
2558 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2560 * *npp != NULL --> update the file handle in the vnode
2563 nfs_lookitup(dvp, name, len, cred, procp, npp)
2564 register struct vnode *dvp;
2569 struct nfsnode **npp;
2571 register u_int32_t *tl;
2572 register caddr_t cp;
2573 register int32_t t1, t2;
2574 struct vnode *newvp = (struct vnode *)0;
2575 struct nfsnode *np, *dnp = VTONFS(dvp);
2576 caddr_t bpos, dpos, cp2;
2577 int error = 0, fhlen, attrflag;
2578 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2580 int v3 = NFS_ISV3(dvp);
2582 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
2583 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
2584 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2585 nfsm_fhtom(dvp, v3);
2586 nfsm_strtom(name, len, NFS_MAXNAMLEN);
2587 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred);
2588 if (npp && !error) {
2589 nfsm_getfh(nfhp, fhlen, v3);
2592 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2593 free((caddr_t)np->n_fhp, M_NFSBIGFH);
2594 np->n_fhp = &np->n_fh;
2595 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2596 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK);
2597 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2598 np->n_fhsize = fhlen;
2600 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
2604 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
2612 nfsm_postop_attr(newvp, attrflag);
2613 if (!attrflag && *npp == NULL) {
2622 nfsm_loadattr(newvp, (struct vattr *)0);
2625 if (npp && *npp == NULL) {
2640 * Nfs Version 3 commit rpc
2643 nfs_commit(vp, offset, cnt, cred, procp)
2650 register caddr_t cp;
2651 register u_int32_t *tl;
2652 register int32_t t1, t2;
2653 register struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2654 caddr_t bpos, dpos, cp2;
2655 int error = 0, wccflag = NFSV3_WCCRATTR;
2656 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2658 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
2660 nfsstats.rpccnt[NFSPROC_COMMIT]++;
2661 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1));
2663 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2664 txdr_hyper(offset, tl);
2666 *tl = txdr_unsigned(cnt);
2667 nfsm_request(vp, NFSPROC_COMMIT, procp, cred);
2668 nfsm_wcc_data(vp, wccflag);
2670 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF);
2671 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
2672 NFSX_V3WRITEVERF)) {
2673 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
2675 error = NFSERR_STALEWRITEVERF;
2684 * For async requests when nfsiod(s) are running, queue the request by
2685 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the
2690 struct vop_strategy_args *ap;
2692 register struct buf *bp = ap->a_bp;
2697 KASSERT(!(bp->b_flags & B_DONE), ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2698 KASSERT(BUF_REFCNT(bp) > 0, ("nfs_strategy: buffer %p not locked", bp));
2700 if (bp->b_flags & B_PHYS)
2701 panic("nfs physio");
2703 if (bp->b_flags & B_ASYNC)
2704 p = (struct proc *)0;
2706 p = curproc; /* XXX */
2708 if (bp->b_iocmd == BIO_READ)
2714 * If the op is asynchronous and an i/o daemon is waiting
2715 * queue the request, wake it up and wait for completion
2716 * otherwise just do it ourselves.
2718 if ((bp->b_flags & B_ASYNC) == 0 ||
2719 nfs_asyncio(bp, NOCRED, p))
2720 error = nfs_doio(bp, cr, p);
2725 * fsync vnode op. Just call nfs_flush() with commit == 1.
2730 struct vop_fsync_args /* {
2731 struct vnodeop_desc *a_desc;
2732 struct vnode * a_vp;
2733 struct ucred * a_cred;
2739 return (nfs_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_p, 1));
2743 * Flush all the blocks associated with a vnode.
2744 * Walk through the buffer pool and push any dirty pages
2745 * associated with the vnode.
2748 nfs_flush(vp, cred, waitfor, p, commit)
2749 register struct vnode *vp;
2755 register struct nfsnode *np = VTONFS(vp);
2756 register struct buf *bp;
2759 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2760 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2762 u_quad_t off, endoff, toff;
2763 struct ucred* wcred = NULL;
2764 struct buf **bvec = NULL;
2765 #ifndef NFS_COMMITBVECSIZ
2766 #define NFS_COMMITBVECSIZ 20
2768 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2769 int bvecsize = 0, bveccount;
2771 if (nmp->nm_flag & NFSMNT_INT)
2776 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2777 * server, but nas not been committed to stable storage on the server
2778 * yet. On the first pass, the byte range is worked out and the commit
2779 * rpc is done. On the second pass, nfs_writebp() is called to do the
2786 if (NFS_ISV3(vp) && commit) {
2789 * Count up how many buffers waiting for a commit.
2792 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2793 nbp = TAILQ_NEXT(bp, b_vnbufs);
2794 if (BUF_REFCNT(bp) == 0 &&
2795 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2796 == (B_DELWRI | B_NEEDCOMMIT))
2800 * Allocate space to remember the list of bufs to commit. It is
2801 * important to use M_NOWAIT here to avoid a race with nfs_write.
2802 * If we can't get memory (for whatever reason), we will end up
2803 * committing the buffers one-by-one in the loop below.
2805 if (bveccount > NFS_COMMITBVECSIZ) {
2806 if (bvec != NULL && bvec != bvec_on_stack)
2808 bvec = (struct buf **)
2809 malloc(bveccount * sizeof(struct buf *),
2812 bvec = bvec_on_stack;
2813 bvecsize = NFS_COMMITBVECSIZ;
2815 bvecsize = bveccount;
2817 bvec = bvec_on_stack;
2818 bvecsize = NFS_COMMITBVECSIZ;
2820 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2821 nbp = TAILQ_NEXT(bp, b_vnbufs);
2822 if (bvecpos >= bvecsize)
2824 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2825 (B_DELWRI | B_NEEDCOMMIT) ||
2826 BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
2830 * Work out if all buffers are using the same cred
2831 * so we can deal with them all with one commit.
2833 * NOTE: we are not clearing B_DONE here, so we have
2834 * to do it later on in this routine if we intend to
2835 * initiate I/O on the bp.
2837 * Note: to avoid loopback deadlocks, we do not
2838 * assign b_runningbufspace.
2841 wcred = bp->b_wcred;
2842 else if (wcred != bp->b_wcred)
2844 bp->b_flags |= B_WRITEINPROG;
2845 vfs_busy_pages(bp, 1);
2848 * bp is protected by being locked, but nbp is not
2849 * and vfs_busy_pages() may sleep. We have to
2852 nbp = TAILQ_NEXT(bp, b_vnbufs);
2855 * A list of these buffers is kept so that the
2856 * second loop knows which buffers have actually
2857 * been committed. This is necessary, since there
2858 * may be a race between the commit rpc and new
2859 * uncommitted writes on the file.
2861 bvec[bvecpos++] = bp;
2862 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2866 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2874 * Commit data on the server, as required.
2875 * If all bufs are using the same wcred, then use that with
2876 * one call for all of them, otherwise commit each one
2879 if (wcred != NOCRED)
2880 retv = nfs_commit(vp, off, (int)(endoff - off),
2884 for (i = 0; i < bvecpos; i++) {
2887 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2889 size = (u_quad_t)(bp->b_dirtyend
2891 retv = nfs_commit(vp, off, (int)size,
2897 if (retv == NFSERR_STALEWRITEVERF)
2898 nfs_clearcommit(vp->v_mount);
2901 * Now, either mark the blocks I/O done or mark the
2902 * blocks dirty, depending on whether the commit
2905 for (i = 0; i < bvecpos; i++) {
2907 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG | B_CLUSTEROK);
2910 * Error, leave B_DELWRI intact
2912 vfs_unbusy_pages(bp);
2916 * Success, remove B_DELWRI ( bundirty() ).
2918 * b_dirtyoff/b_dirtyend seem to be NFS
2919 * specific. We should probably move that
2920 * into bundirty(). XXX
2924 bp->b_flags |= B_ASYNC;
2926 bp->b_flags &= ~B_DONE;
2927 bp->b_ioflags &= ~BIO_ERROR;
2928 bp->b_dirtyoff = bp->b_dirtyend = 0;
2936 * Start/do any write(s) that are required.
2940 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2941 nbp = TAILQ_NEXT(bp, b_vnbufs);
2942 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) {
2943 if (waitfor != MNT_WAIT || passone)
2945 error = BUF_TIMELOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL,
2946 "nfsfsync", slpflag, slptimeo);
2949 panic("nfs_fsync: inconsistent lock");
2950 if (error == ENOLCK)
2952 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) {
2956 if (slpflag == PCATCH) {
2962 if ((bp->b_flags & B_DELWRI) == 0)
2963 panic("nfs_fsync: not dirty");
2964 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
2969 if (passone || !commit)
2970 bp->b_flags |= B_ASYNC;
2972 bp->b_flags |= B_ASYNC | B_WRITEINPROG;
2982 if (waitfor == MNT_WAIT) {
2983 while (vp->v_numoutput) {
2984 vp->v_flag |= VBWAIT;
2985 error = tsleep((caddr_t)&vp->v_numoutput,
2986 slpflag | (PRIBIO + 1), "nfsfsync", slptimeo);
2988 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) {
2992 if (slpflag == PCATCH) {
2998 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd) && commit) {
3002 if (np->n_flag & NWRITEERR) {
3003 error = np->n_error;
3004 np->n_flag &= ~NWRITEERR;
3007 if (bvec != NULL && bvec != bvec_on_stack)
3013 * NFS advisory byte-level locks.
3017 struct vop_advlock_args /* {
3026 return (nfs_dolock(ap));
3030 * Print out the contents of an nfsnode.
3034 struct vop_print_args /* {
3038 register struct vnode *vp = ap->a_vp;
3039 register struct nfsnode *np = VTONFS(vp);
3041 printf("tag VT_NFS, fileid %ld fsid 0x%x",
3042 np->n_vattr.va_fileid, np->n_vattr.va_fsid);
3043 if (vp->v_type == VFIFO)
3050 * This is the "real" nfs::bwrite(struct buf*).
3051 * B_WRITEINPROG isn't set unless the force flag is one and it
3052 * handles the B_NEEDCOMMIT flag.
3053 * We set B_CACHE if this is a VMIO buffer.
3056 nfs_writebp(bp, force, procp)
3057 register struct buf *bp;
3062 int oldflags = bp->b_flags;
3068 if (BUF_REFCNT(bp) == 0)
3069 panic("bwrite: buffer is not locked???");
3071 if (bp->b_flags & B_INVAL) {
3076 bp->b_flags |= B_CACHE;
3079 * Undirty the bp. We will redirty it later if the I/O fails.
3084 bp->b_flags &= ~B_DONE;
3085 bp->b_ioflags &= ~BIO_ERROR;
3086 bp->b_iocmd = BIO_WRITE;
3088 bp->b_vp->v_numoutput++;
3089 curproc->p_stats->p_ru.ru_oublock++;
3093 * Note: to avoid loopback deadlocks, we do not
3094 * assign b_runningbufspace.
3096 vfs_busy_pages(bp, 1);
3099 bp->b_flags |= B_WRITEINPROG;
3103 if( (oldflags & B_ASYNC) == 0) {
3104 int rtval = bufwait(bp);
3106 if (oldflags & B_DELWRI) {
3108 reassignbuf(bp, bp->b_vp);
3120 * nfs special file access vnode op.
3121 * Essentially just get vattr and then imitate iaccess() since the device is
3122 * local to the client.
3126 struct vop_access_args /* {
3129 struct ucred *a_cred;
3133 register struct vattr *vap;
3135 register struct ucred *cred = ap->a_cred;
3136 struct vnode *vp = ap->a_vp;
3137 mode_t mode = ap->a_mode;
3143 * Disallow write attempts on filesystems mounted read-only;
3144 * unless the file is a socket, fifo, or a block or character
3145 * device resident on the filesystem.
3147 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3148 switch (vp->v_type) {
3158 * If you're the super-user,
3159 * you always get access.
3161 if (cred->cr_uid == 0)
3164 error = VOP_GETATTR(vp, vap, cred, ap->a_p);
3168 * Access check is based on only one of owner, group, public.
3169 * If not owner, then check group. If not a member of the
3170 * group, then check public access.
3172 if (cred->cr_uid != vap->va_uid) {
3174 gp = cred->cr_groups;
3175 for (i = 0; i < cred->cr_ngroups; i++, gp++)
3176 if (vap->va_gid == *gp)
3182 error = (vap->va_mode & mode) == mode ? 0 : EACCES;
3187 * Read wrapper for special devices.
3191 struct vop_read_args /* {
3195 struct ucred *a_cred;
3198 register struct nfsnode *np = VTONFS(ap->a_vp);
3204 getnanotime(&np->n_atim);
3205 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap));
3209 * Write wrapper for special devices.
3213 struct vop_write_args /* {
3217 struct ucred *a_cred;
3220 register struct nfsnode *np = VTONFS(ap->a_vp);
3226 getnanotime(&np->n_mtim);
3227 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap));
3231 * Close wrapper for special devices.
3233 * Update the times on the nfsnode then do device close.
3237 struct vop_close_args /* {
3240 struct ucred *a_cred;
3244 register struct vnode *vp = ap->a_vp;
3245 register struct nfsnode *np = VTONFS(vp);
3248 if (np->n_flag & (NACC | NUPD)) {
3250 if (vp->v_usecount == 1 &&
3251 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3253 if (np->n_flag & NACC)
3254 vattr.va_atime = np->n_atim;
3255 if (np->n_flag & NUPD)
3256 vattr.va_mtime = np->n_mtim;
3257 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p);
3260 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap));
3264 * Read wrapper for fifos.
3268 struct vop_read_args /* {
3272 struct ucred *a_cred;
3275 register struct nfsnode *np = VTONFS(ap->a_vp);
3281 getnanotime(&np->n_atim);
3282 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap));
3286 * Write wrapper for fifos.
3290 struct vop_write_args /* {
3294 struct ucred *a_cred;
3297 register struct nfsnode *np = VTONFS(ap->a_vp);
3303 getnanotime(&np->n_mtim);
3304 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap));
3308 * Close wrapper for fifos.
3310 * Update the times on the nfsnode then do fifo close.
3314 struct vop_close_args /* {
3317 struct ucred *a_cred;
3321 register struct vnode *vp = ap->a_vp;
3322 register struct nfsnode *np = VTONFS(vp);
3326 if (np->n_flag & (NACC | NUPD)) {
3328 if (np->n_flag & NACC)
3330 if (np->n_flag & NUPD)
3333 if (vp->v_usecount == 1 &&
3334 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3336 if (np->n_flag & NACC)
3337 vattr.va_atime = np->n_atim;
3338 if (np->n_flag & NUPD)
3339 vattr.va_mtime = np->n_mtim;
3340 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p);
3343 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap));