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 1.3 2003/06/19 01:55:07 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 <miscfs/fifofs/fifo.h>
75 #include <nfs/rpcv2.h>
76 #include <nfs/nfsproto.h>
78 #include <nfs/nfsnode.h>
79 #include <nfs/nfsmount.h>
80 #include <nfs/xdr_subs.h>
81 #include <nfs/nfsm_subs.h>
82 #include <nfs/nqnfs.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 __P((struct vop_read_args *));
102 static int nfsspec_write __P((struct vop_write_args *));
103 static int nfsfifo_read __P((struct vop_read_args *));
104 static int nfsfifo_write __P((struct vop_write_args *));
105 static int nfsspec_close __P((struct vop_close_args *));
106 static int nfsfifo_close __P((struct vop_close_args *));
107 #define nfs_poll vop_nopoll
108 static int nfs_flush __P((struct vnode *,struct ucred *,int,struct proc *,int));
109 static int nfs_setattrrpc __P((struct vnode *,struct vattr *,struct ucred *,struct proc *));
110 static int nfs_lookup __P((struct vop_lookup_args *));
111 static int nfs_create __P((struct vop_create_args *));
112 static int nfs_mknod __P((struct vop_mknod_args *));
113 static int nfs_open __P((struct vop_open_args *));
114 static int nfs_close __P((struct vop_close_args *));
115 static int nfs_access __P((struct vop_access_args *));
116 static int nfs_getattr __P((struct vop_getattr_args *));
117 static int nfs_setattr __P((struct vop_setattr_args *));
118 static int nfs_read __P((struct vop_read_args *));
119 static int nfs_mmap __P((struct vop_mmap_args *));
120 static int nfs_fsync __P((struct vop_fsync_args *));
121 static int nfs_remove __P((struct vop_remove_args *));
122 static int nfs_link __P((struct vop_link_args *));
123 static int nfs_rename __P((struct vop_rename_args *));
124 static int nfs_mkdir __P((struct vop_mkdir_args *));
125 static int nfs_rmdir __P((struct vop_rmdir_args *));
126 static int nfs_symlink __P((struct vop_symlink_args *));
127 static int nfs_readdir __P((struct vop_readdir_args *));
128 static int nfs_bmap __P((struct vop_bmap_args *));
129 static int nfs_strategy __P((struct vop_strategy_args *));
130 static int nfs_lookitup __P((struct vnode *, const char *, int,
131 struct ucred *, struct proc *, struct nfsnode **));
132 static int nfs_sillyrename __P((struct vnode *,struct vnode *,struct componentname *));
133 static int nfsspec_access __P((struct vop_access_args *));
134 static int nfs_readlink __P((struct vop_readlink_args *));
135 static int nfs_print __P((struct vop_print_args *));
136 static int nfs_advlock __P((struct vop_advlock_args *));
137 static int nfs_bwrite __P((struct vop_bwrite_args *));
139 * Global vfs data structures for nfs
141 vop_t **nfsv2_vnodeop_p;
142 static struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = {
143 { &vop_default_desc, (vop_t *) vop_defaultop },
144 { &vop_access_desc, (vop_t *) nfs_access },
145 { &vop_advlock_desc, (vop_t *) nfs_advlock },
146 { &vop_bmap_desc, (vop_t *) nfs_bmap },
147 { &vop_bwrite_desc, (vop_t *) nfs_bwrite },
148 { &vop_close_desc, (vop_t *) nfs_close },
149 { &vop_create_desc, (vop_t *) nfs_create },
150 { &vop_fsync_desc, (vop_t *) nfs_fsync },
151 { &vop_getattr_desc, (vop_t *) nfs_getattr },
152 { &vop_getpages_desc, (vop_t *) nfs_getpages },
153 { &vop_putpages_desc, (vop_t *) nfs_putpages },
154 { &vop_inactive_desc, (vop_t *) nfs_inactive },
155 { &vop_islocked_desc, (vop_t *) vop_stdislocked },
156 { &vop_lease_desc, (vop_t *) vop_null },
157 { &vop_link_desc, (vop_t *) nfs_link },
158 { &vop_lock_desc, (vop_t *) vop_sharedlock },
159 { &vop_lookup_desc, (vop_t *) nfs_lookup },
160 { &vop_mkdir_desc, (vop_t *) nfs_mkdir },
161 { &vop_mknod_desc, (vop_t *) nfs_mknod },
162 { &vop_mmap_desc, (vop_t *) nfs_mmap },
163 { &vop_open_desc, (vop_t *) nfs_open },
164 { &vop_poll_desc, (vop_t *) nfs_poll },
165 { &vop_print_desc, (vop_t *) nfs_print },
166 { &vop_read_desc, (vop_t *) nfs_read },
167 { &vop_readdir_desc, (vop_t *) nfs_readdir },
168 { &vop_readlink_desc, (vop_t *) nfs_readlink },
169 { &vop_reclaim_desc, (vop_t *) nfs_reclaim },
170 { &vop_remove_desc, (vop_t *) nfs_remove },
171 { &vop_rename_desc, (vop_t *) nfs_rename },
172 { &vop_rmdir_desc, (vop_t *) nfs_rmdir },
173 { &vop_setattr_desc, (vop_t *) nfs_setattr },
174 { &vop_strategy_desc, (vop_t *) nfs_strategy },
175 { &vop_symlink_desc, (vop_t *) nfs_symlink },
176 { &vop_unlock_desc, (vop_t *) vop_stdunlock },
177 { &vop_write_desc, (vop_t *) nfs_write },
180 static struct vnodeopv_desc nfsv2_vnodeop_opv_desc =
181 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries };
182 VNODEOP_SET(nfsv2_vnodeop_opv_desc);
185 * Special device vnode ops
187 vop_t **spec_nfsv2nodeop_p;
188 static struct vnodeopv_entry_desc nfsv2_specop_entries[] = {
189 { &vop_default_desc, (vop_t *) spec_vnoperate },
190 { &vop_access_desc, (vop_t *) nfsspec_access },
191 { &vop_close_desc, (vop_t *) nfsspec_close },
192 { &vop_fsync_desc, (vop_t *) nfs_fsync },
193 { &vop_getattr_desc, (vop_t *) nfs_getattr },
194 { &vop_inactive_desc, (vop_t *) nfs_inactive },
195 { &vop_islocked_desc, (vop_t *) vop_stdislocked },
196 { &vop_lock_desc, (vop_t *) vop_sharedlock },
197 { &vop_print_desc, (vop_t *) nfs_print },
198 { &vop_read_desc, (vop_t *) nfsspec_read },
199 { &vop_reclaim_desc, (vop_t *) nfs_reclaim },
200 { &vop_setattr_desc, (vop_t *) nfs_setattr },
201 { &vop_unlock_desc, (vop_t *) vop_stdunlock },
202 { &vop_write_desc, (vop_t *) nfsspec_write },
205 static struct vnodeopv_desc spec_nfsv2nodeop_opv_desc =
206 { &spec_nfsv2nodeop_p, nfsv2_specop_entries };
207 VNODEOP_SET(spec_nfsv2nodeop_opv_desc);
209 vop_t **fifo_nfsv2nodeop_p;
210 static struct vnodeopv_entry_desc nfsv2_fifoop_entries[] = {
211 { &vop_default_desc, (vop_t *) fifo_vnoperate },
212 { &vop_access_desc, (vop_t *) nfsspec_access },
213 { &vop_close_desc, (vop_t *) nfsfifo_close },
214 { &vop_fsync_desc, (vop_t *) nfs_fsync },
215 { &vop_getattr_desc, (vop_t *) nfs_getattr },
216 { &vop_inactive_desc, (vop_t *) nfs_inactive },
217 { &vop_islocked_desc, (vop_t *) vop_stdislocked },
218 { &vop_lock_desc, (vop_t *) vop_sharedlock },
219 { &vop_print_desc, (vop_t *) nfs_print },
220 { &vop_read_desc, (vop_t *) nfsfifo_read },
221 { &vop_reclaim_desc, (vop_t *) nfs_reclaim },
222 { &vop_setattr_desc, (vop_t *) nfs_setattr },
223 { &vop_unlock_desc, (vop_t *) vop_stdunlock },
224 { &vop_write_desc, (vop_t *) nfsfifo_write },
227 static struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc =
228 { &fifo_nfsv2nodeop_p, nfsv2_fifoop_entries };
229 VNODEOP_SET(fifo_nfsv2nodeop_opv_desc);
231 static int nfs_mknodrpc __P((struct vnode *dvp, struct vnode **vpp,
232 struct componentname *cnp,
234 static int nfs_removerpc __P((struct vnode *dvp, const char *name,
236 struct ucred *cred, struct proc *proc));
237 static int nfs_renamerpc __P((struct vnode *fdvp, const char *fnameptr,
238 int fnamelen, struct vnode *tdvp,
239 const char *tnameptr, int tnamelen,
240 struct ucred *cred, struct proc *proc));
241 static int nfs_renameit __P((struct vnode *sdvp,
242 struct componentname *scnp,
243 struct sillyrename *sp));
248 extern u_int32_t nfs_true, nfs_false;
249 extern u_int32_t nfs_xdrneg1;
250 extern struct nfsstats nfsstats;
251 extern nfstype nfsv3_type[9];
252 struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
253 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON];
254 int nfs_numasync = 0;
255 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1))
257 SYSCTL_DECL(_vfs_nfs);
259 static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
260 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
261 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
263 static int nfsv3_commit_on_close = 0;
264 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
265 &nfsv3_commit_on_close, 0, "write+commit on close, else only write");
267 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
268 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
270 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
271 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
274 #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \
275 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \
276 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP)
278 nfs3_access_otw(struct vnode *vp,
285 int error = 0, attrflag;
287 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
288 caddr_t bpos, dpos, cp2;
289 register int32_t t1, t2;
292 struct nfsnode *np = VTONFS(vp);
294 nfsstats.rpccnt[NFSPROC_ACCESS]++;
295 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED);
297 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
298 *tl = txdr_unsigned(wmode);
299 nfsm_request(vp, NFSPROC_ACCESS, p, cred);
300 nfsm_postop_attr(vp, attrflag);
302 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
303 rmode = fxdr_unsigned(u_int32_t, *tl);
305 np->n_modeuid = cred->cr_uid;
306 np->n_modestamp = time_second;
313 * nfs access vnode op.
314 * For nfs version 2, just return ok. File accesses may fail later.
315 * For nfs version 3, use the access rpc to check accessibility. If file modes
316 * are changed on the server, accesses might still fail later.
320 struct vop_access_args /* {
323 struct ucred *a_cred;
327 register struct vnode *vp = ap->a_vp;
329 u_int32_t mode, wmode;
330 int v3 = NFS_ISV3(vp);
331 struct nfsnode *np = VTONFS(vp);
334 * Disallow write attempts on filesystems mounted read-only;
335 * unless the file is a socket, fifo, or a block or character
336 * device resident on the filesystem.
338 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
339 switch (vp->v_type) {
349 * For nfs v3, check to see if we have done this recently, and if
350 * so return our cached result instead of making an ACCESS call.
351 * If not, do an access rpc, otherwise you are stuck emulating
352 * ufs_access() locally using the vattr. This may not be correct,
353 * since the server may apply other access criteria such as
354 * client uid-->server uid mapping that we do not know about.
357 if (ap->a_mode & VREAD)
358 mode = NFSV3ACCESS_READ;
361 if (vp->v_type != VDIR) {
362 if (ap->a_mode & VWRITE)
363 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
364 if (ap->a_mode & VEXEC)
365 mode |= NFSV3ACCESS_EXECUTE;
367 if (ap->a_mode & VWRITE)
368 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
370 if (ap->a_mode & VEXEC)
371 mode |= NFSV3ACCESS_LOOKUP;
373 /* XXX safety belt, only make blanket request if caching */
374 if (nfsaccess_cache_timeout > 0) {
375 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY |
376 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE |
377 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP;
383 * Does our cached result allow us to give a definite yes to
386 if ((time_second < (np->n_modestamp + nfsaccess_cache_timeout)) &&
387 (ap->a_cred->cr_uid == np->n_modeuid) &&
388 ((np->n_mode & mode) == mode)) {
389 nfsstats.accesscache_hits++;
392 * Either a no, or a don't know. Go to the wire.
394 nfsstats.accesscache_misses++;
395 error = nfs3_access_otw(vp, wmode, ap->a_p,ap->a_cred);
397 if ((np->n_mode & mode) != mode) {
404 if ((error = nfsspec_access(ap)) != 0)
408 * Attempt to prevent a mapped root from accessing a file
409 * which it shouldn't. We try to read a byte from the file
410 * if the user is root and the file is not zero length.
411 * After calling nfsspec_access, we should have the correct
414 if (ap->a_cred->cr_uid == 0 && (ap->a_mode & VREAD)
415 && VTONFS(vp)->n_size > 0) {
422 auio.uio_iov = &aiov;
426 auio.uio_segflg = UIO_SYSSPACE;
427 auio.uio_rw = UIO_READ;
428 auio.uio_procp = ap->a_p;
430 if (vp->v_type == VREG)
431 error = nfs_readrpc(vp, &auio, ap->a_cred);
432 else if (vp->v_type == VDIR) {
434 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
436 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
437 error = nfs_readdirrpc(vp, &auio, ap->a_cred);
439 } else if (vp->v_type == VLNK)
440 error = nfs_readlinkrpc(vp, &auio, ap->a_cred);
450 * Check to see if the type is ok
451 * and that deletion is not in progress.
452 * For paged in text files, you will need to flush the page cache
453 * if consistency is lost.
458 struct vop_open_args /* {
461 struct ucred *a_cred;
465 register struct vnode *vp = ap->a_vp;
466 struct nfsnode *np = VTONFS(vp);
467 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
471 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
473 printf("open eacces vtyp=%d\n",vp->v_type);
478 * Get a valid lease. If cached data is stale, flush it.
480 if (nmp->nm_flag & NFSMNT_NQNFS) {
481 if (NQNFS_CKINVALID(vp, np, ND_READ)) {
483 error = nqnfs_getlease(vp, ND_READ, ap->a_cred,
485 } while (error == NQNFS_EXPIRED);
488 if (np->n_lrev != np->n_brev ||
489 (np->n_flag & NQNFSNONCACHE)) {
490 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
491 ap->a_p, 1)) == EINTR)
493 np->n_brev = np->n_lrev;
497 if (np->n_flag & NMODIFIED) {
498 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
499 ap->a_p, 1)) == EINTR)
502 if (vp->v_type == VDIR)
503 np->n_direofoffset = 0;
504 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p);
507 np->n_mtime = vattr.va_mtime.tv_sec;
509 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p);
512 if (np->n_mtime != vattr.va_mtime.tv_sec) {
513 if (vp->v_type == VDIR)
514 np->n_direofoffset = 0;
515 if ((error = nfs_vinvalbuf(vp, V_SAVE,
516 ap->a_cred, ap->a_p, 1)) == EINTR)
518 np->n_mtime = vattr.va_mtime.tv_sec;
522 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0)
523 np->n_attrstamp = 0; /* For Open/Close consistency */
529 * What an NFS client should do upon close after writing is a debatable issue.
530 * Most NFS clients push delayed writes to the server upon close, basically for
532 * 1 - So that any write errors may be reported back to the client process
533 * doing the close system call. By far the two most likely errors are
534 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
535 * 2 - To put a worst case upper bound on cache inconsistency between
536 * multiple clients for the file.
537 * There is also a consistency problem for Version 2 of the protocol w.r.t.
538 * not being able to tell if other clients are writing a file concurrently,
539 * since there is no way of knowing if the changed modify time in the reply
540 * is only due to the write for this client.
541 * (NFS Version 3 provides weak cache consistency data in the reply that
542 * should be sufficient to detect and handle this case.)
544 * The current code does the following:
545 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
546 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
547 * or commit them (this satisfies 1 and 2 except for the
548 * case where the server crashes after this close but
549 * before the commit RPC, which is felt to be "good
550 * enough". Changing the last argument to nfs_flush() to
551 * a 1 would force a commit operation, if it is felt a
552 * commit is necessary now.
553 * for NQNFS - do nothing now, since 2 is dealt with via leases and
554 * 1 should be dealt with via an fsync() system call for
555 * cases where write errors are important.
560 struct vop_close_args /* {
561 struct vnodeop_desc *a_desc;
564 struct ucred *a_cred;
568 register struct vnode *vp = ap->a_vp;
569 register struct nfsnode *np = VTONFS(vp);
572 if (vp->v_type == VREG) {
573 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 &&
574 (np->n_flag & NMODIFIED)) {
577 * Under NFSv3 we have dirty buffers to dispose of. We
578 * must flush them to the NFS server. We have the option
579 * of waiting all the way through the commit rpc or just
580 * waiting for the initial write. The default is to only
581 * wait through the initial write so the data is in the
582 * server's cache, which is roughly similar to the state
583 * a standard disk subsystem leaves the file in on close().
585 * We cannot clear the NMODIFIED bit in np->n_flag due to
586 * potential races with other processes, and certainly
587 * cannot clear it if we don't commit.
589 int cm = nfsv3_commit_on_close ? 1 : 0;
590 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, cm);
591 /* np->n_flag &= ~NMODIFIED; */
593 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1);
597 if (np->n_flag & NWRITEERR) {
598 np->n_flag &= ~NWRITEERR;
606 * nfs getattr call from vfs.
610 struct vop_getattr_args /* {
613 struct ucred *a_cred;
617 register struct vnode *vp = ap->a_vp;
618 register struct nfsnode *np = VTONFS(vp);
620 register u_int32_t *tl;
621 register int32_t t1, t2;
624 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
625 int v3 = NFS_ISV3(vp);
628 * Update local times for special files.
630 if (np->n_flag & (NACC | NUPD))
633 * First look in the cache.
635 if (nfs_getattrcache(vp, ap->a_vap) == 0)
638 if (v3 && nfsaccess_cache_timeout > 0) {
639 nfsstats.accesscache_misses++;
640 nfs3_access_otw(vp, NFSV3ACCESS_ALL, ap->a_p, ap->a_cred);
641 if (nfs_getattrcache(vp, ap->a_vap) == 0)
645 nfsstats.rpccnt[NFSPROC_GETATTR]++;
646 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3));
648 nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred);
650 nfsm_loadattr(vp, ap->a_vap);
661 struct vop_setattr_args /* {
662 struct vnodeop_desc *a_desc;
665 struct ucred *a_cred;
669 register struct vnode *vp = ap->a_vp;
670 register struct nfsnode *np = VTONFS(vp);
671 register struct vattr *vap = ap->a_vap;
680 * Setting of flags is not supported.
682 if (vap->va_flags != VNOVAL)
686 * Disallow write attempts if the filesystem is mounted read-only.
688 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
689 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
690 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
691 (vp->v_mount->mnt_flag & MNT_RDONLY))
693 if (vap->va_size != VNOVAL) {
694 switch (vp->v_type) {
701 if (vap->va_mtime.tv_sec == VNOVAL &&
702 vap->va_atime.tv_sec == VNOVAL &&
703 vap->va_mode == (mode_t)VNOVAL &&
704 vap->va_uid == (uid_t)VNOVAL &&
705 vap->va_gid == (gid_t)VNOVAL)
707 vap->va_size = VNOVAL;
711 * Disallow write attempts if the filesystem is
714 if (vp->v_mount->mnt_flag & MNT_RDONLY)
718 * We run vnode_pager_setsize() early (why?),
719 * we must set np->n_size now to avoid vinvalbuf
720 * V_SAVE races that might setsize a lower
725 error = nfs_meta_setsize(vp, ap->a_cred,
726 ap->a_p, vap->va_size);
728 if (np->n_flag & NMODIFIED) {
729 if (vap->va_size == 0)
730 error = nfs_vinvalbuf(vp, 0,
731 ap->a_cred, ap->a_p, 1);
733 error = nfs_vinvalbuf(vp, V_SAVE,
734 ap->a_cred, ap->a_p, 1);
737 vnode_pager_setsize(vp, np->n_size);
741 np->n_vattr.va_size = vap->va_size;
743 } else if ((vap->va_mtime.tv_sec != VNOVAL ||
744 vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) &&
745 vp->v_type == VREG &&
746 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
747 ap->a_p, 1)) == EINTR)
749 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p);
750 if (error && vap->va_size != VNOVAL) {
751 np->n_size = np->n_vattr.va_size = tsize;
752 vnode_pager_setsize(vp, np->n_size);
758 * Do an nfs setattr rpc.
761 nfs_setattrrpc(vp, vap, cred, procp)
762 register struct vnode *vp;
763 register struct vattr *vap;
767 register struct nfsv2_sattr *sp;
769 register int32_t t1, t2;
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, procp, cred);
803 nfsm_wcc_data(vp, wccflag);
805 nfsm_loadattr(vp, (struct vattr *)0);
811 * nfs lookup call, one step at a time...
812 * First look in cache
813 * If not found, unlock the directory nfsnode and do the rpc
817 struct vop_lookup_args /* {
818 struct vnodeop_desc *a_desc;
820 struct vnode **a_vpp;
821 struct componentname *a_cnp;
824 struct componentname *cnp = ap->a_cnp;
825 struct vnode *dvp = ap->a_dvp;
826 struct vnode **vpp = ap->a_vpp;
827 int flags = cnp->cn_flags;
832 struct nfsmount *nmp;
833 caddr_t bpos, dpos, cp2;
834 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
838 int lockparent, wantparent, error = 0, attrflag, fhsize;
839 int v3 = NFS_ISV3(dvp);
840 struct proc *p = cnp->cn_proc;
843 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
844 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
846 if (dvp->v_type != VDIR)
848 lockparent = flags & LOCKPARENT;
849 wantparent = flags & (LOCKPARENT|WANTPARENT);
850 nmp = VFSTONFS(dvp->v_mount);
852 if ((error = cache_lookup(dvp, vpp, cnp)) && error != ENOENT) {
856 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, p)) != 0) {
864 * See the comment starting `Step through' in ufs/ufs_lookup.c
865 * for an explanation of the locking protocol
870 } else if (flags & ISDOTDOT) {
871 VOP_UNLOCK(dvp, 0, p);
872 error = vget(newvp, LK_EXCLUSIVE, p);
873 if (!error && lockparent && (flags & ISLASTCN))
874 error = vn_lock(dvp, LK_EXCLUSIVE, p);
876 error = vget(newvp, LK_EXCLUSIVE, p);
877 if (!lockparent || error || !(flags & ISLASTCN))
878 VOP_UNLOCK(dvp, 0, p);
881 if (vpid == newvp->v_id) {
882 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, p)
883 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) {
884 nfsstats.lookupcache_hits++;
885 if (cnp->cn_nameiop != LOOKUP &&
887 cnp->cn_flags |= SAVENAME;
893 if (lockparent && dvp != newvp && (flags & ISLASTCN))
894 VOP_UNLOCK(dvp, 0, p);
896 error = vn_lock(dvp, LK_EXCLUSIVE, p);
903 nfsstats.lookupcache_misses++;
904 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
905 len = cnp->cn_namelen;
906 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
907 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
909 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
910 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred);
912 nfsm_postop_attr(dvp, attrflag);
916 nfsm_getfh(fhp, fhsize, v3);
919 * Handle RENAME case...
921 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) {
922 if (NFS_CMPFH(np, fhp, fhsize)) {
926 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
933 nfsm_postop_attr(newvp, attrflag);
934 nfsm_postop_attr(dvp, attrflag);
936 nfsm_loadattr(newvp, (struct vattr *)0);
939 cnp->cn_flags |= SAVENAME;
941 VOP_UNLOCK(dvp, 0, p);
945 if (flags & ISDOTDOT) {
946 VOP_UNLOCK(dvp, 0, p);
947 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
949 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, p);
953 if (lockparent && (flags & ISLASTCN) &&
954 (error = vn_lock(dvp, LK_EXCLUSIVE, p))) {
958 } else if (NFS_CMPFH(np, fhp, fhsize)) {
962 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
967 if (!lockparent || !(flags & ISLASTCN))
968 VOP_UNLOCK(dvp, 0, p);
972 nfsm_postop_attr(newvp, attrflag);
973 nfsm_postop_attr(dvp, attrflag);
975 nfsm_loadattr(newvp, (struct vattr *)0);
976 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
977 cnp->cn_flags |= SAVENAME;
978 if ((cnp->cn_flags & MAKEENTRY) &&
979 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) {
980 np->n_ctime = np->n_vattr.va_ctime.tv_sec;
981 cache_enter(dvp, newvp, cnp);
986 if (newvp != NULLVP) {
990 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
991 (flags & ISLASTCN) && error == ENOENT) {
993 VOP_UNLOCK(dvp, 0, p);
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) {
1139 } else if (retlen < len) {
1151 nfs_writerpc(vp, uiop, cred, iomode, must_commit)
1152 register struct vnode *vp;
1153 register struct uio *uiop;
1155 int *iomode, *must_commit;
1157 register u_int32_t *tl;
1158 register caddr_t cp;
1159 register int32_t t1, t2, backup;
1160 caddr_t bpos, dpos, cp2;
1161 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1162 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1163 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
1164 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC;
1167 if (uiop->uio_iovcnt != 1)
1168 panic("nfs: writerpc iovcnt > 1");
1171 tsiz = uiop->uio_resid;
1172 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1175 nfsstats.rpccnt[NFSPROC_WRITE]++;
1176 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1177 nfsm_reqhead(vp, NFSPROC_WRITE,
1178 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len));
1181 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
1182 txdr_hyper(uiop->uio_offset, tl);
1184 *tl++ = txdr_unsigned(len);
1185 *tl++ = txdr_unsigned(*iomode);
1186 *tl = txdr_unsigned(len);
1188 register u_int32_t x;
1190 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1191 /* Set both "begin" and "current" to non-garbage. */
1192 x = txdr_unsigned((u_int32_t)uiop->uio_offset);
1193 *tl++ = x; /* "begin offset" */
1194 *tl++ = x; /* "current offset" */
1195 x = txdr_unsigned(len);
1196 *tl++ = x; /* total to this offset */
1197 *tl = x; /* size of this write */
1199 nfsm_uiotom(uiop, len);
1200 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred);
1202 wccflag = NFSV3_WCCCHK;
1203 nfsm_wcc_data(vp, wccflag);
1205 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
1206 + NFSX_V3WRITEVERF);
1207 rlen = fxdr_unsigned(int, *tl++);
1212 } else if (rlen < len) {
1213 backup = len - rlen;
1214 uiop->uio_iov->iov_base -= backup;
1215 uiop->uio_iov->iov_len += backup;
1216 uiop->uio_offset -= backup;
1217 uiop->uio_resid += backup;
1220 commit = fxdr_unsigned(int, *tl++);
1223 * Return the lowest committment level
1224 * obtained by any of the RPCs.
1226 if (committed == NFSV3WRITE_FILESYNC)
1228 else if (committed == NFSV3WRITE_DATASYNC &&
1229 commit == NFSV3WRITE_UNSTABLE)
1231 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){
1232 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1234 nmp->nm_state |= NFSSTA_HASWRITEVERF;
1235 } else if (bcmp((caddr_t)tl,
1236 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1238 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1243 nfsm_loadattr(vp, (struct vattr *)0);
1245 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec;
1252 if (vp->v_mount->mnt_flag & MNT_ASYNC)
1253 committed = NFSV3WRITE_FILESYNC;
1254 *iomode = committed;
1256 uiop->uio_resid = tsiz;
1262 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1263 * mode set to specify the file type and the size field for rdev.
1266 nfs_mknodrpc(dvp, vpp, cnp, vap)
1267 register struct vnode *dvp;
1268 register struct vnode **vpp;
1269 register struct componentname *cnp;
1270 register struct vattr *vap;
1272 register struct nfsv2_sattr *sp;
1273 register u_int32_t *tl;
1274 register caddr_t cp;
1275 register int32_t t1, t2;
1276 struct vnode *newvp = (struct vnode *)0;
1277 struct nfsnode *np = (struct nfsnode *)0;
1281 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
1282 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1284 int v3 = NFS_ISV3(dvp);
1286 if (vap->va_type == VCHR || vap->va_type == VBLK)
1287 rdev = txdr_unsigned(vap->va_rdev);
1288 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1291 return (EOPNOTSUPP);
1293 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) != 0) {
1296 nfsstats.rpccnt[NFSPROC_MKNOD]++;
1297 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED +
1298 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1299 nfsm_fhtom(dvp, v3);
1300 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1302 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1303 *tl++ = vtonfsv3_type(vap->va_type);
1304 nfsm_v3attrbuild(vap, FALSE);
1305 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1306 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1307 *tl++ = txdr_unsigned(umajor(vap->va_rdev));
1308 *tl = txdr_unsigned(uminor(vap->va_rdev));
1311 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1312 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1313 sp->sa_uid = nfs_xdrneg1;
1314 sp->sa_gid = nfs_xdrneg1;
1316 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1317 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1319 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred);
1321 nfsm_mtofh(dvp, newvp, v3, gotvp);
1325 newvp = (struct vnode *)0;
1327 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1328 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np);
1334 nfsm_wcc_data(dvp, wccflag);
1340 if (cnp->cn_flags & MAKEENTRY)
1341 cache_enter(dvp, newvp, cnp);
1344 VTONFS(dvp)->n_flag |= NMODIFIED;
1346 VTONFS(dvp)->n_attrstamp = 0;
1352 * just call nfs_mknodrpc() to do the work.
1357 struct vop_mknod_args /* {
1358 struct vnode *a_dvp;
1359 struct vnode **a_vpp;
1360 struct componentname *a_cnp;
1361 struct vattr *a_vap;
1364 return nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1367 static u_long create_verf;
1369 * nfs file create call
1373 struct vop_create_args /* {
1374 struct vnode *a_dvp;
1375 struct vnode **a_vpp;
1376 struct componentname *a_cnp;
1377 struct vattr *a_vap;
1380 register struct vnode *dvp = ap->a_dvp;
1381 register struct vattr *vap = ap->a_vap;
1382 register struct componentname *cnp = ap->a_cnp;
1383 register struct nfsv2_sattr *sp;
1384 register u_int32_t *tl;
1385 register caddr_t cp;
1386 register int32_t t1, t2;
1387 struct nfsnode *np = (struct nfsnode *)0;
1388 struct vnode *newvp = (struct vnode *)0;
1389 caddr_t bpos, dpos, cp2;
1390 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
1391 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1393 int v3 = NFS_ISV3(dvp);
1396 * Oops, not for me..
1398 if (vap->va_type == VSOCK)
1399 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1401 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) != 0) {
1404 if (vap->va_vaflags & VA_EXCLUSIVE)
1407 nfsstats.rpccnt[NFSPROC_CREATE]++;
1408 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED +
1409 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1410 nfsm_fhtom(dvp, v3);
1411 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1413 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1414 if (fmode & O_EXCL) {
1415 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
1416 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF);
1418 if (!TAILQ_EMPTY(&in_ifaddrhead))
1419 *tl++ = IA_SIN(in_ifaddrhead.tqh_first)->sin_addr.s_addr;
1422 *tl++ = create_verf;
1423 *tl = ++create_verf;
1425 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
1426 nfsm_v3attrbuild(vap, FALSE);
1429 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1430 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1431 sp->sa_uid = nfs_xdrneg1;
1432 sp->sa_gid = nfs_xdrneg1;
1434 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1435 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1437 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred);
1439 nfsm_mtofh(dvp, newvp, v3, gotvp);
1443 newvp = (struct vnode *)0;
1445 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1446 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np);
1452 nfsm_wcc_data(dvp, wccflag);
1455 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
1461 } else if (v3 && (fmode & O_EXCL)) {
1463 * We are normally called with only a partially initialized
1464 * VAP. Since the NFSv3 spec says that server may use the
1465 * file attributes to store the verifier, the spec requires
1466 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1467 * in atime, but we can't really assume that all servers will
1468 * so we ensure that our SETATTR sets both atime and mtime.
1470 if (vap->va_mtime.tv_sec == VNOVAL)
1471 vfs_timestamp(&vap->va_mtime);
1472 if (vap->va_atime.tv_sec == VNOVAL)
1473 vap->va_atime = vap->va_mtime;
1474 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc);
1477 if (cnp->cn_flags & MAKEENTRY)
1478 cache_enter(dvp, newvp, cnp);
1481 VTONFS(dvp)->n_flag |= NMODIFIED;
1483 VTONFS(dvp)->n_attrstamp = 0;
1488 * nfs file remove call
1489 * To try and make nfs semantics closer to ufs semantics, a file that has
1490 * other processes using the vnode is renamed instead of removed and then
1491 * removed later on the last close.
1492 * - If v_usecount > 1
1493 * If a rename is not already in the works
1494 * call nfs_sillyrename() to set it up
1500 struct vop_remove_args /* {
1501 struct vnodeop_desc *a_desc;
1502 struct vnode * a_dvp;
1503 struct vnode * a_vp;
1504 struct componentname * a_cnp;
1507 register struct vnode *vp = ap->a_vp;
1508 register struct vnode *dvp = ap->a_dvp;
1509 register struct componentname *cnp = ap->a_cnp;
1510 register struct nfsnode *np = VTONFS(vp);
1515 if ((cnp->cn_flags & HASBUF) == 0)
1516 panic("nfs_remove: no name");
1517 if (vp->v_usecount < 1)
1518 panic("nfs_remove: bad v_usecount");
1520 if (vp->v_type == VDIR)
1522 else if (vp->v_usecount == 1 || (np->n_sillyrename &&
1523 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 &&
1524 vattr.va_nlink > 1)) {
1526 * Purge the name cache so that the chance of a lookup for
1527 * the name succeeding while the remove is in progress is
1528 * minimized. Without node locking it can still happen, such
1529 * that an I/O op returns ESTALE, but since you get this if
1530 * another host removes the file..
1534 * throw away biocache buffers, mainly to avoid
1535 * unnecessary delayed writes later.
1537 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1);
1540 error = nfs_removerpc(dvp, cnp->cn_nameptr,
1541 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc);
1543 * Kludge City: If the first reply to the remove rpc is lost..
1544 * the reply to the retransmitted request will be ENOENT
1545 * since the file was in fact removed
1546 * Therefore, we cheat and return success.
1548 if (error == ENOENT)
1550 } else if (!np->n_sillyrename)
1551 error = nfs_sillyrename(dvp, vp, cnp);
1552 np->n_attrstamp = 0;
1557 * nfs file remove rpc called from nfs_inactive
1561 register struct sillyrename *sp;
1564 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred,
1569 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1572 nfs_removerpc(dvp, name, namelen, cred, proc)
1573 register struct vnode *dvp;
1579 register u_int32_t *tl;
1580 register caddr_t cp;
1581 register int32_t t1, t2;
1582 caddr_t bpos, dpos, cp2;
1583 int error = 0, wccflag = NFSV3_WCCRATTR;
1584 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1585 int v3 = NFS_ISV3(dvp);
1587 nfsstats.rpccnt[NFSPROC_REMOVE]++;
1588 nfsm_reqhead(dvp, NFSPROC_REMOVE,
1589 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1590 nfsm_fhtom(dvp, v3);
1591 nfsm_strtom(name, namelen, NFS_MAXNAMLEN);
1592 nfsm_request(dvp, NFSPROC_REMOVE, proc, cred);
1594 nfsm_wcc_data(dvp, wccflag);
1596 VTONFS(dvp)->n_flag |= NMODIFIED;
1598 VTONFS(dvp)->n_attrstamp = 0;
1603 * nfs file rename call
1607 struct vop_rename_args /* {
1608 struct vnode *a_fdvp;
1609 struct vnode *a_fvp;
1610 struct componentname *a_fcnp;
1611 struct vnode *a_tdvp;
1612 struct vnode *a_tvp;
1613 struct componentname *a_tcnp;
1616 register struct vnode *fvp = ap->a_fvp;
1617 register struct vnode *tvp = ap->a_tvp;
1618 register struct vnode *fdvp = ap->a_fdvp;
1619 register struct vnode *tdvp = ap->a_tdvp;
1620 register struct componentname *tcnp = ap->a_tcnp;
1621 register struct componentname *fcnp = ap->a_fcnp;
1625 if ((tcnp->cn_flags & HASBUF) == 0 ||
1626 (fcnp->cn_flags & HASBUF) == 0)
1627 panic("nfs_rename: no name");
1629 /* Check for cross-device rename */
1630 if ((fvp->v_mount != tdvp->v_mount) ||
1631 (tvp && (fvp->v_mount != tvp->v_mount))) {
1637 * We have to flush B_DELWRI data prior to renaming
1638 * the file. If we don't, the delayed-write buffers
1639 * can be flushed out later after the file has gone stale
1640 * under NFSV3. NFSV2 does not have this problem because
1641 * ( as far as I can tell ) it flushes dirty buffers more
1645 VOP_FSYNC(fvp, fcnp->cn_cred, MNT_WAIT, fcnp->cn_proc);
1647 VOP_FSYNC(tvp, tcnp->cn_cred, MNT_WAIT, tcnp->cn_proc);
1650 * If the tvp exists and is in use, sillyrename it before doing the
1651 * rename of the new file over it.
1652 * XXX Can't sillyrename a directory.
1654 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename &&
1655 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1660 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1661 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1664 if (fvp->v_type == VDIR) {
1665 if (tvp != NULL && tvp->v_type == VDIR)
1680 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1682 if (error == ENOENT)
1688 * nfs file rename rpc called from nfs_remove() above
1691 nfs_renameit(sdvp, scnp, sp)
1693 struct componentname *scnp;
1694 register struct sillyrename *sp;
1696 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
1697 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc));
1701 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1704 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc)
1705 register struct vnode *fdvp;
1706 const char *fnameptr;
1708 register struct vnode *tdvp;
1709 const char *tnameptr;
1714 register u_int32_t *tl;
1715 register caddr_t cp;
1716 register int32_t t1, t2;
1717 caddr_t bpos, dpos, cp2;
1718 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
1719 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1720 int v3 = NFS_ISV3(fdvp);
1722 nfsstats.rpccnt[NFSPROC_RENAME]++;
1723 nfsm_reqhead(fdvp, NFSPROC_RENAME,
1724 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) +
1725 nfsm_rndup(tnamelen));
1726 nfsm_fhtom(fdvp, v3);
1727 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN);
1728 nfsm_fhtom(tdvp, v3);
1729 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN);
1730 nfsm_request(fdvp, NFSPROC_RENAME, proc, cred);
1732 nfsm_wcc_data(fdvp, fwccflag);
1733 nfsm_wcc_data(tdvp, twccflag);
1736 VTONFS(fdvp)->n_flag |= NMODIFIED;
1737 VTONFS(tdvp)->n_flag |= NMODIFIED;
1739 VTONFS(fdvp)->n_attrstamp = 0;
1741 VTONFS(tdvp)->n_attrstamp = 0;
1746 * nfs hard link create call
1750 struct vop_link_args /* {
1751 struct vnode *a_tdvp;
1753 struct componentname *a_cnp;
1756 register struct vnode *vp = ap->a_vp;
1757 register struct vnode *tdvp = ap->a_tdvp;
1758 register struct componentname *cnp = ap->a_cnp;
1759 register u_int32_t *tl;
1760 register caddr_t cp;
1761 register int32_t t1, t2;
1762 caddr_t bpos, dpos, cp2;
1763 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
1764 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1767 if (vp->v_mount != tdvp->v_mount) {
1772 * Push all writes to the server, so that the attribute cache
1773 * doesn't get "out of sync" with the server.
1774 * XXX There should be a better way!
1776 VOP_FSYNC(vp, cnp->cn_cred, MNT_WAIT, cnp->cn_proc);
1779 nfsstats.rpccnt[NFSPROC_LINK]++;
1780 nfsm_reqhead(vp, NFSPROC_LINK,
1781 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
1783 nfsm_fhtom(tdvp, v3);
1784 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1785 nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred);
1787 nfsm_postop_attr(vp, attrflag);
1788 nfsm_wcc_data(tdvp, wccflag);
1791 VTONFS(tdvp)->n_flag |= NMODIFIED;
1793 VTONFS(vp)->n_attrstamp = 0;
1795 VTONFS(tdvp)->n_attrstamp = 0;
1797 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1799 if (error == EEXIST)
1805 * nfs symbolic link create call
1809 struct vop_symlink_args /* {
1810 struct vnode *a_dvp;
1811 struct vnode **a_vpp;
1812 struct componentname *a_cnp;
1813 struct vattr *a_vap;
1817 register struct vnode *dvp = ap->a_dvp;
1818 register struct vattr *vap = ap->a_vap;
1819 register struct componentname *cnp = ap->a_cnp;
1820 register struct nfsv2_sattr *sp;
1821 register u_int32_t *tl;
1822 register caddr_t cp;
1823 register int32_t t1, t2;
1824 caddr_t bpos, dpos, cp2;
1825 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
1826 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1827 struct vnode *newvp = (struct vnode *)0;
1828 int v3 = NFS_ISV3(dvp);
1830 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1831 slen = strlen(ap->a_target);
1832 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED +
1833 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3));
1834 nfsm_fhtom(dvp, v3);
1835 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1837 nfsm_v3attrbuild(vap, FALSE);
1839 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
1841 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1842 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
1843 sp->sa_uid = nfs_xdrneg1;
1844 sp->sa_gid = nfs_xdrneg1;
1845 sp->sa_size = nfs_xdrneg1;
1846 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1847 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1851 * Issue the NFS request and get the rpc response.
1853 * Only NFSv3 responses returning an error of 0 actually return
1854 * a file handle that can be converted into newvp without having
1855 * to do an extra lookup rpc.
1857 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred);
1860 nfsm_mtofh(dvp, newvp, v3, gotvp);
1861 nfsm_wcc_data(dvp, wccflag);
1865 * out code jumps -> here, mrep is also freed.
1871 * If we get an EEXIST error, silently convert it to no-error
1872 * in case of an NFS retry.
1874 if (error == EEXIST)
1878 * If we do not have (or no longer have) an error, and we could
1879 * not extract the newvp from the response due to the request being
1880 * NFSv2 or the error being EEXIST. We have to do a lookup in order
1881 * to obtain a newvp to return.
1883 if (error == 0 && newvp == NULL) {
1884 struct nfsnode *np = NULL;
1886 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1887 cnp->cn_cred, cnp->cn_proc, &np);
1897 VTONFS(dvp)->n_flag |= NMODIFIED;
1899 VTONFS(dvp)->n_attrstamp = 0;
1908 struct vop_mkdir_args /* {
1909 struct vnode *a_dvp;
1910 struct vnode **a_vpp;
1911 struct componentname *a_cnp;
1912 struct vattr *a_vap;
1915 register struct vnode *dvp = ap->a_dvp;
1916 register struct vattr *vap = ap->a_vap;
1917 register struct componentname *cnp = ap->a_cnp;
1918 register struct nfsv2_sattr *sp;
1919 register u_int32_t *tl;
1920 register caddr_t cp;
1921 register int32_t t1, t2;
1923 struct nfsnode *np = (struct nfsnode *)0;
1924 struct vnode *newvp = (struct vnode *)0;
1925 caddr_t bpos, dpos, cp2;
1926 int error = 0, wccflag = NFSV3_WCCRATTR;
1928 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1930 int v3 = NFS_ISV3(dvp);
1932 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc)) != 0) {
1935 len = cnp->cn_namelen;
1936 nfsstats.rpccnt[NFSPROC_MKDIR]++;
1937 nfsm_reqhead(dvp, NFSPROC_MKDIR,
1938 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3));
1939 nfsm_fhtom(dvp, v3);
1940 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
1942 nfsm_v3attrbuild(vap, FALSE);
1944 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1945 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
1946 sp->sa_uid = nfs_xdrneg1;
1947 sp->sa_gid = nfs_xdrneg1;
1948 sp->sa_size = nfs_xdrneg1;
1949 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1950 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1952 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred);
1954 nfsm_mtofh(dvp, newvp, v3, gotvp);
1956 nfsm_wcc_data(dvp, wccflag);
1958 VTONFS(dvp)->n_flag |= NMODIFIED;
1960 VTONFS(dvp)->n_attrstamp = 0;
1962 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
1963 * if we can succeed in looking up the directory.
1965 if (error == EEXIST || (!error && !gotvp)) {
1968 newvp = (struct vnode *)0;
1970 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
1974 if (newvp->v_type != VDIR)
1987 * nfs remove directory call
1991 struct vop_rmdir_args /* {
1992 struct vnode *a_dvp;
1994 struct componentname *a_cnp;
1997 register struct vnode *vp = ap->a_vp;
1998 register struct vnode *dvp = ap->a_dvp;
1999 register struct componentname *cnp = ap->a_cnp;
2000 register u_int32_t *tl;
2001 register caddr_t cp;
2002 register int32_t t1, t2;
2003 caddr_t bpos, dpos, cp2;
2004 int error = 0, wccflag = NFSV3_WCCRATTR;
2005 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2006 int v3 = NFS_ISV3(dvp);
2010 nfsstats.rpccnt[NFSPROC_RMDIR]++;
2011 nfsm_reqhead(dvp, NFSPROC_RMDIR,
2012 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
2013 nfsm_fhtom(dvp, v3);
2014 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
2015 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred);
2017 nfsm_wcc_data(dvp, wccflag);
2019 VTONFS(dvp)->n_flag |= NMODIFIED;
2021 VTONFS(dvp)->n_attrstamp = 0;
2025 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2027 if (error == ENOENT)
2037 struct vop_readdir_args /* {
2040 struct ucred *a_cred;
2043 register struct vnode *vp = ap->a_vp;
2044 register struct nfsnode *np = VTONFS(vp);
2045 register struct uio *uio = ap->a_uio;
2049 if (vp->v_type != VDIR)
2052 * First, check for hit on the EOF offset cache
2054 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2055 (np->n_flag & NMODIFIED) == 0) {
2056 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) {
2057 if (NQNFS_CKCACHABLE(vp, ND_READ)) {
2058 nfsstats.direofcache_hits++;
2061 } else if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_procp) == 0 &&
2062 np->n_mtime == vattr.va_mtime.tv_sec) {
2063 nfsstats.direofcache_hits++;
2069 * Call nfs_bioread() to do the real work.
2071 tresid = uio->uio_resid;
2072 error = nfs_bioread(vp, uio, 0, ap->a_cred);
2074 if (!error && uio->uio_resid == tresid)
2075 nfsstats.direofcache_misses++;
2081 * Called from below the buffer cache by nfs_doio().
2084 nfs_readdirrpc(vp, uiop, cred)
2086 register struct uio *uiop;
2090 register int len, left;
2091 register struct dirent *dp = NULL;
2092 register u_int32_t *tl;
2093 register caddr_t cp;
2094 register int32_t t1, t2;
2095 register nfsuint64 *cookiep;
2096 caddr_t bpos, dpos, cp2;
2097 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2099 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2100 struct nfsnode *dnp = VTONFS(vp);
2102 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2104 int v3 = NFS_ISV3(vp);
2107 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2108 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2109 panic("nfs readdirrpc bad uio");
2113 * If there is no cookie, assume directory was stale.
2115 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2119 return (NFSERR_BAD_COOKIE);
2121 * Loop around doing readdir rpc's of size nm_readdirsize
2122 * truncated to a multiple of DIRBLKSIZ.
2123 * The stopping criteria is EOF or buffer full.
2125 while (more_dirs && bigenough) {
2126 nfsstats.rpccnt[NFSPROC_READDIR]++;
2127 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) +
2131 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
2132 *tl++ = cookie.nfsuquad[0];
2133 *tl++ = cookie.nfsuquad[1];
2134 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2135 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2137 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2138 *tl++ = cookie.nfsuquad[0];
2140 *tl = txdr_unsigned(nmp->nm_readdirsize);
2141 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred);
2143 nfsm_postop_attr(vp, attrflag);
2145 nfsm_dissect(tl, u_int32_t *,
2147 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2148 dnp->n_cookieverf.nfsuquad[1] = *tl;
2154 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2155 more_dirs = fxdr_unsigned(int, *tl);
2157 /* loop thru the dir entries, doctoring them to 4bsd form */
2158 while (more_dirs && bigenough) {
2160 nfsm_dissect(tl, u_int32_t *,
2162 fileno = fxdr_hyper(tl);
2163 len = fxdr_unsigned(int, *(tl + 2));
2165 nfsm_dissect(tl, u_int32_t *,
2167 fileno = fxdr_unsigned(u_quad_t, *tl++);
2168 len = fxdr_unsigned(int, *tl);
2170 if (len <= 0 || len > NFS_MAXNAMLEN) {
2175 tlen = nfsm_rndup(len);
2177 tlen += 4; /* To ensure null termination */
2178 left = DIRBLKSIZ - blksiz;
2179 if ((tlen + DIRHDSIZ) > left) {
2180 dp->d_reclen += left;
2181 uiop->uio_iov->iov_base += left;
2182 uiop->uio_iov->iov_len -= left;
2183 uiop->uio_offset += left;
2184 uiop->uio_resid -= left;
2187 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2190 dp = (struct dirent *)uiop->uio_iov->iov_base;
2191 dp->d_fileno = (int)fileno;
2193 dp->d_reclen = tlen + DIRHDSIZ;
2194 dp->d_type = DT_UNKNOWN;
2195 blksiz += dp->d_reclen;
2196 if (blksiz == DIRBLKSIZ)
2198 uiop->uio_offset += DIRHDSIZ;
2199 uiop->uio_resid -= DIRHDSIZ;
2200 uiop->uio_iov->iov_base += DIRHDSIZ;
2201 uiop->uio_iov->iov_len -= DIRHDSIZ;
2202 nfsm_mtouio(uiop, len);
2203 cp = uiop->uio_iov->iov_base;
2205 *cp = '\0'; /* null terminate */
2206 uiop->uio_iov->iov_base += tlen;
2207 uiop->uio_iov->iov_len -= tlen;
2208 uiop->uio_offset += tlen;
2209 uiop->uio_resid -= tlen;
2211 nfsm_adv(nfsm_rndup(len));
2213 nfsm_dissect(tl, u_int32_t *,
2216 nfsm_dissect(tl, u_int32_t *,
2220 cookie.nfsuquad[0] = *tl++;
2222 cookie.nfsuquad[1] = *tl++;
2227 more_dirs = fxdr_unsigned(int, *tl);
2230 * If at end of rpc data, get the eof boolean
2233 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2234 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2239 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2240 * by increasing d_reclen for the last record.
2243 left = DIRBLKSIZ - blksiz;
2244 dp->d_reclen += left;
2245 uiop->uio_iov->iov_base += left;
2246 uiop->uio_iov->iov_len -= left;
2247 uiop->uio_offset += left;
2248 uiop->uio_resid -= left;
2252 * We are now either at the end of the directory or have filled the
2256 dnp->n_direofoffset = uiop->uio_offset;
2258 if (uiop->uio_resid > 0)
2259 printf("EEK! readdirrpc resid > 0\n");
2260 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2268 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2271 nfs_readdirplusrpc(vp, uiop, cred)
2273 register struct uio *uiop;
2276 register int len, left;
2277 register struct dirent *dp;
2278 register u_int32_t *tl;
2279 register caddr_t cp;
2280 register int32_t t1, t2;
2281 register struct vnode *newvp;
2282 register nfsuint64 *cookiep;
2283 caddr_t bpos, dpos, cp2, dpossav1, dpossav2;
2284 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2;
2285 struct nameidata nami, *ndp = &nami;
2286 struct componentname *cnp = &ndp->ni_cnd;
2288 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2289 struct nfsnode *dnp = VTONFS(vp), *np;
2292 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2293 int attrflag, fhsize;
2296 dp = (struct dirent *)0;
2299 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2300 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2301 panic("nfs readdirplusrpc bad uio");
2307 * If there is no cookie, assume directory was stale.
2309 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2313 return (NFSERR_BAD_COOKIE);
2315 * Loop around doing readdir rpc's of size nm_readdirsize
2316 * truncated to a multiple of DIRBLKSIZ.
2317 * The stopping criteria is EOF or buffer full.
2319 while (more_dirs && bigenough) {
2320 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
2321 nfsm_reqhead(vp, NFSPROC_READDIRPLUS,
2322 NFSX_FH(1) + 6 * NFSX_UNSIGNED);
2324 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
2325 *tl++ = cookie.nfsuquad[0];
2326 *tl++ = cookie.nfsuquad[1];
2327 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2328 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2329 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2330 *tl = txdr_unsigned(nmp->nm_rsize);
2331 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred);
2332 nfsm_postop_attr(vp, attrflag);
2337 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2338 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2339 dnp->n_cookieverf.nfsuquad[1] = *tl++;
2340 more_dirs = fxdr_unsigned(int, *tl);
2342 /* loop thru the dir entries, doctoring them to 4bsd form */
2343 while (more_dirs && bigenough) {
2344 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2345 fileno = fxdr_hyper(tl);
2346 len = fxdr_unsigned(int, *(tl + 2));
2347 if (len <= 0 || len > NFS_MAXNAMLEN) {
2352 tlen = nfsm_rndup(len);
2354 tlen += 4; /* To ensure null termination*/
2355 left = DIRBLKSIZ - blksiz;
2356 if ((tlen + DIRHDSIZ) > left) {
2357 dp->d_reclen += left;
2358 uiop->uio_iov->iov_base += left;
2359 uiop->uio_iov->iov_len -= left;
2360 uiop->uio_offset += left;
2361 uiop->uio_resid -= left;
2364 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2367 dp = (struct dirent *)uiop->uio_iov->iov_base;
2368 dp->d_fileno = (int)fileno;
2370 dp->d_reclen = tlen + DIRHDSIZ;
2371 dp->d_type = DT_UNKNOWN;
2372 blksiz += dp->d_reclen;
2373 if (blksiz == DIRBLKSIZ)
2375 uiop->uio_offset += DIRHDSIZ;
2376 uiop->uio_resid -= DIRHDSIZ;
2377 uiop->uio_iov->iov_base += DIRHDSIZ;
2378 uiop->uio_iov->iov_len -= DIRHDSIZ;
2379 cnp->cn_nameptr = uiop->uio_iov->iov_base;
2380 cnp->cn_namelen = len;
2381 nfsm_mtouio(uiop, len);
2382 cp = uiop->uio_iov->iov_base;
2385 uiop->uio_iov->iov_base += tlen;
2386 uiop->uio_iov->iov_len -= tlen;
2387 uiop->uio_offset += tlen;
2388 uiop->uio_resid -= tlen;
2390 nfsm_adv(nfsm_rndup(len));
2391 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2393 cookie.nfsuquad[0] = *tl++;
2394 cookie.nfsuquad[1] = *tl++;
2399 * Since the attributes are before the file handle
2400 * (sigh), we must skip over the attributes and then
2401 * come back and get them.
2403 attrflag = fxdr_unsigned(int, *tl);
2407 nfsm_adv(NFSX_V3FATTR);
2408 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2409 doit = fxdr_unsigned(int, *tl);
2411 nfsm_getfh(fhp, fhsize, 1);
2412 if (NFS_CMPFH(dnp, fhp, fhsize)) {
2417 error = nfs_nget(vp->v_mount, fhp,
2425 if (doit && bigenough) {
2430 nfsm_loadattr(newvp, (struct vattr *)0);
2434 IFTODT(VTTOIF(np->n_vattr.va_type));
2436 cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp);
2439 /* Just skip over the file handle */
2440 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2441 i = fxdr_unsigned(int, *tl);
2442 nfsm_adv(nfsm_rndup(i));
2444 if (newvp != NULLVP) {
2451 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2452 more_dirs = fxdr_unsigned(int, *tl);
2455 * If at end of rpc data, get the eof boolean
2458 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2459 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2464 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2465 * by increasing d_reclen for the last record.
2468 left = DIRBLKSIZ - blksiz;
2469 dp->d_reclen += left;
2470 uiop->uio_iov->iov_base += left;
2471 uiop->uio_iov->iov_len -= left;
2472 uiop->uio_offset += left;
2473 uiop->uio_resid -= left;
2477 * We are now either at the end of the directory or have filled the
2481 dnp->n_direofoffset = uiop->uio_offset;
2483 if (uiop->uio_resid > 0)
2484 printf("EEK! readdirplusrpc resid > 0\n");
2485 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2489 if (newvp != NULLVP) {
2500 * Silly rename. To make the NFS filesystem that is stateless look a little
2501 * more like the "ufs" a remove of an active vnode is translated to a rename
2502 * to a funny looking filename that is removed by nfs_inactive on the
2503 * nfsnode. There is the potential for another process on a different client
2504 * to create the same funny name between the nfs_lookitup() fails and the
2505 * nfs_rename() completes, but...
2508 nfs_sillyrename(dvp, vp, cnp)
2509 struct vnode *dvp, *vp;
2510 struct componentname *cnp;
2512 register struct sillyrename *sp;
2520 if (vp->v_type == VDIR)
2521 panic("nfs: sillyrename dir");
2523 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2524 M_NFSREQ, M_WAITOK);
2525 sp->s_cred = crdup(cnp->cn_cred);
2529 /* Fudge together a funny name */
2530 pid = cnp->cn_proc->p_pid;
2531 sp->s_namlen = sprintf(sp->s_name, ".nfsA%04x4.4", pid);
2533 /* Try lookitups until we get one that isn't there */
2534 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2535 cnp->cn_proc, (struct nfsnode **)0) == 0) {
2537 if (sp->s_name[4] > 'z') {
2542 error = nfs_renameit(dvp, cnp, sp);
2545 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2547 np->n_sillyrename = sp;
2552 free((caddr_t)sp, M_NFSREQ);
2557 * Look up a file name and optionally either update the file handle or
2558 * allocate an nfsnode, depending on the value of npp.
2559 * npp == NULL --> just do the lookup
2560 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2562 * *npp != NULL --> update the file handle in the vnode
2565 nfs_lookitup(dvp, name, len, cred, procp, npp)
2566 register struct vnode *dvp;
2571 struct nfsnode **npp;
2573 register u_int32_t *tl;
2574 register caddr_t cp;
2575 register int32_t t1, t2;
2576 struct vnode *newvp = (struct vnode *)0;
2577 struct nfsnode *np, *dnp = VTONFS(dvp);
2578 caddr_t bpos, dpos, cp2;
2579 int error = 0, fhlen, attrflag;
2580 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2582 int v3 = NFS_ISV3(dvp);
2584 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
2585 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
2586 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2587 nfsm_fhtom(dvp, v3);
2588 nfsm_strtom(name, len, NFS_MAXNAMLEN);
2589 nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred);
2590 if (npp && !error) {
2591 nfsm_getfh(nfhp, fhlen, v3);
2594 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2595 free((caddr_t)np->n_fhp, M_NFSBIGFH);
2596 np->n_fhp = &np->n_fh;
2597 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2598 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK);
2599 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2600 np->n_fhsize = fhlen;
2602 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
2606 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
2614 nfsm_postop_attr(newvp, attrflag);
2615 if (!attrflag && *npp == NULL) {
2624 nfsm_loadattr(newvp, (struct vattr *)0);
2627 if (npp && *npp == NULL) {
2642 * Nfs Version 3 commit rpc
2645 nfs_commit(vp, offset, cnt, cred, procp)
2652 register caddr_t cp;
2653 register u_int32_t *tl;
2654 register int32_t t1, t2;
2655 register struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2656 caddr_t bpos, dpos, cp2;
2657 int error = 0, wccflag = NFSV3_WCCRATTR;
2658 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2660 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
2662 nfsstats.rpccnt[NFSPROC_COMMIT]++;
2663 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1));
2665 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2666 txdr_hyper(offset, tl);
2668 *tl = txdr_unsigned(cnt);
2669 nfsm_request(vp, NFSPROC_COMMIT, procp, cred);
2670 nfsm_wcc_data(vp, wccflag);
2672 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF);
2673 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
2674 NFSX_V3WRITEVERF)) {
2675 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
2677 error = NFSERR_STALEWRITEVERF;
2686 * - make nfs_bmap() essentially a no-op that does no translation
2687 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
2688 * (Maybe I could use the process's page mapping, but I was concerned that
2689 * Kernel Write might not be enabled and also figured copyout() would do
2690 * a lot more work than bcopy() and also it currently happens in the
2691 * context of the swapper process (2).
2695 struct vop_bmap_args /* {
2698 struct vnode **a_vpp;
2704 register struct vnode *vp = ap->a_vp;
2706 if (ap->a_vpp != NULL)
2708 if (ap->a_bnp != NULL)
2709 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize);
2710 if (ap->a_runp != NULL)
2712 if (ap->a_runb != NULL)
2719 * For async requests when nfsiod(s) are running, queue the request by
2720 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the
2725 struct vop_strategy_args *ap;
2727 register struct buf *bp = ap->a_bp;
2732 KASSERT(!(bp->b_flags & B_DONE), ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2733 KASSERT(BUF_REFCNT(bp) > 0, ("nfs_strategy: buffer %p not locked", bp));
2735 if (bp->b_flags & B_PHYS)
2736 panic("nfs physio");
2738 if (bp->b_flags & B_ASYNC)
2739 p = (struct proc *)0;
2741 p = curproc; /* XXX */
2743 if (bp->b_flags & B_READ)
2749 * If the op is asynchronous and an i/o daemon is waiting
2750 * queue the request, wake it up and wait for completion
2751 * otherwise just do it ourselves.
2753 if ((bp->b_flags & B_ASYNC) == 0 ||
2754 nfs_asyncio(bp, NOCRED, p))
2755 error = nfs_doio(bp, cr, p);
2762 * NB Currently unsupported.
2767 struct vop_mmap_args /* {
2770 struct ucred *a_cred;
2779 * fsync vnode op. Just call nfs_flush() with commit == 1.
2784 struct vop_fsync_args /* {
2785 struct vnodeop_desc *a_desc;
2786 struct vnode * a_vp;
2787 struct ucred * a_cred;
2793 return (nfs_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_p, 1));
2797 * Flush all the blocks associated with a vnode.
2798 * Walk through the buffer pool and push any dirty pages
2799 * associated with the vnode.
2802 nfs_flush(vp, cred, waitfor, p, commit)
2803 register struct vnode *vp;
2809 register struct nfsnode *np = VTONFS(vp);
2810 register struct buf *bp;
2813 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2814 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2816 u_quad_t off, endoff, toff;
2817 struct ucred* wcred = NULL;
2818 struct buf **bvec = NULL;
2819 #ifndef NFS_COMMITBVECSIZ
2820 #define NFS_COMMITBVECSIZ 20
2822 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2823 int bvecsize = 0, bveccount;
2825 if (nmp->nm_flag & NFSMNT_INT)
2830 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2831 * server, but nas not been committed to stable storage on the server
2832 * yet. On the first pass, the byte range is worked out and the commit
2833 * rpc is done. On the second pass, nfs_writebp() is called to do the
2840 if (NFS_ISV3(vp) && commit) {
2843 * Count up how many buffers waiting for a commit.
2846 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2847 nbp = TAILQ_NEXT(bp, b_vnbufs);
2848 if (BUF_REFCNT(bp) == 0 &&
2849 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2850 == (B_DELWRI | B_NEEDCOMMIT))
2854 * Allocate space to remember the list of bufs to commit. It is
2855 * important to use M_NOWAIT here to avoid a race with nfs_write.
2856 * If we can't get memory (for whatever reason), we will end up
2857 * committing the buffers one-by-one in the loop below.
2859 if (bvec != NULL && bvec != bvec_on_stack)
2861 if (bveccount > NFS_COMMITBVECSIZ) {
2862 bvec = (struct buf **)
2863 malloc(bveccount * sizeof(struct buf *),
2866 bvec = bvec_on_stack;
2867 bvecsize = NFS_COMMITBVECSIZ;
2869 bvecsize = bveccount;
2871 bvec = bvec_on_stack;
2872 bvecsize = NFS_COMMITBVECSIZ;
2874 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2875 nbp = TAILQ_NEXT(bp, b_vnbufs);
2876 if (bvecpos >= bvecsize)
2878 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2879 (B_DELWRI | B_NEEDCOMMIT) ||
2880 BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
2884 * Work out if all buffers are using the same cred
2885 * so we can deal with them all with one commit.
2887 * NOTE: we are not clearing B_DONE here, so we have
2888 * to do it later on in this routine if we intend to
2889 * initiate I/O on the bp.
2891 * Note: to avoid loopback deadlocks, we do not
2892 * assign b_runningbufspace.
2895 wcred = bp->b_wcred;
2896 else if (wcred != bp->b_wcred)
2898 bp->b_flags |= B_WRITEINPROG;
2899 vfs_busy_pages(bp, 1);
2902 * bp is protected by being locked, but nbp is not
2903 * and vfs_busy_pages() may sleep. We have to
2906 nbp = TAILQ_NEXT(bp, b_vnbufs);
2909 * A list of these buffers is kept so that the
2910 * second loop knows which buffers have actually
2911 * been committed. This is necessary, since there
2912 * may be a race between the commit rpc and new
2913 * uncommitted writes on the file.
2915 bvec[bvecpos++] = bp;
2916 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2920 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2928 * Commit data on the server, as required.
2929 * If all bufs are using the same wcred, then use that with
2930 * one call for all of them, otherwise commit each one
2933 if (wcred != NOCRED)
2934 retv = nfs_commit(vp, off, (int)(endoff - off),
2938 for (i = 0; i < bvecpos; i++) {
2941 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2943 size = (u_quad_t)(bp->b_dirtyend
2945 retv = nfs_commit(vp, off, (int)size,
2951 if (retv == NFSERR_STALEWRITEVERF)
2952 nfs_clearcommit(vp->v_mount);
2955 * Now, either mark the blocks I/O done or mark the
2956 * blocks dirty, depending on whether the commit
2959 for (i = 0; i < bvecpos; i++) {
2961 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG | B_CLUSTEROK);
2964 * Error, leave B_DELWRI intact
2966 vfs_unbusy_pages(bp);
2970 * Success, remove B_DELWRI ( bundirty() ).
2972 * b_dirtyoff/b_dirtyend seem to be NFS
2973 * specific. We should probably move that
2974 * into bundirty(). XXX
2978 bp->b_flags |= B_ASYNC;
2980 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR);
2981 bp->b_dirtyoff = bp->b_dirtyend = 0;
2989 * Start/do any write(s) that are required.
2993 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2994 nbp = TAILQ_NEXT(bp, b_vnbufs);
2995 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) {
2996 if (waitfor != MNT_WAIT || passone)
2998 error = BUF_TIMELOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL,
2999 "nfsfsync", slpflag, slptimeo);
3002 panic("nfs_fsync: inconsistent lock");
3003 if (error == ENOLCK)
3005 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) {
3009 if (slpflag == PCATCH) {
3015 if ((bp->b_flags & B_DELWRI) == 0)
3016 panic("nfs_fsync: not dirty");
3017 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
3022 if (passone || !commit)
3023 bp->b_flags |= B_ASYNC;
3025 bp->b_flags |= B_ASYNC | B_WRITEINPROG;
3027 VOP_BWRITE(bp->b_vp, bp);
3035 if (waitfor == MNT_WAIT) {
3036 while (vp->v_numoutput) {
3037 vp->v_flag |= VBWAIT;
3038 error = tsleep((caddr_t)&vp->v_numoutput,
3039 slpflag | (PRIBIO + 1), "nfsfsync", slptimeo);
3041 if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) {
3045 if (slpflag == PCATCH) {
3051 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd) && commit) {
3055 if (np->n_flag & NWRITEERR) {
3056 error = np->n_error;
3057 np->n_flag &= ~NWRITEERR;
3060 if (bvec != NULL && bvec != bvec_on_stack)
3066 * NFS advisory byte-level locks.
3067 * Currently unsupported.
3071 struct vop_advlock_args /* {
3079 register struct nfsnode *np = VTONFS(ap->a_vp);
3082 * The following kludge is to allow diskless support to work
3083 * until a real NFS lockd is implemented. Basically, just pretend
3084 * that this is a local lock.
3086 return (lf_advlock(ap, &(np->n_lockf), np->n_size));
3090 * Print out the contents of an nfsnode.
3094 struct vop_print_args /* {
3098 register struct vnode *vp = ap->a_vp;
3099 register struct nfsnode *np = VTONFS(vp);
3101 printf("tag VT_NFS, fileid %ld fsid 0x%x",
3102 np->n_vattr.va_fileid, np->n_vattr.va_fsid);
3103 if (vp->v_type == VFIFO)
3110 * Just call nfs_writebp() with the force argument set to 1.
3112 * NOTE: B_DONE may or may not be set in a_bp on call.
3116 struct vop_bwrite_args /* {
3120 return (nfs_writebp(ap->a_bp, 1, curproc));
3124 * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless
3125 * the force flag is one and it also handles the B_NEEDCOMMIT flag. We set
3126 * B_CACHE if this is a VMIO buffer.
3129 nfs_writebp(bp, force, procp)
3130 register struct buf *bp;
3135 int oldflags = bp->b_flags;
3141 if (BUF_REFCNT(bp) == 0)
3142 panic("bwrite: buffer is not locked???");
3144 if (bp->b_flags & B_INVAL) {
3149 bp->b_flags |= B_CACHE;
3152 * Undirty the bp. We will redirty it later if the I/O fails.
3157 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR);
3159 bp->b_vp->v_numoutput++;
3160 curproc->p_stats->p_ru.ru_oublock++;
3164 * Note: to avoid loopback deadlocks, we do not
3165 * assign b_runningbufspace.
3167 vfs_busy_pages(bp, 1);
3170 bp->b_flags |= B_WRITEINPROG;
3172 VOP_STRATEGY(bp->b_vp, bp);
3174 if( (oldflags & B_ASYNC) == 0) {
3175 int rtval = biowait(bp);
3177 if (oldflags & B_DELWRI) {
3179 reassignbuf(bp, bp->b_vp);
3191 * nfs special file access vnode op.
3192 * Essentially just get vattr and then imitate iaccess() since the device is
3193 * local to the client.
3197 struct vop_access_args /* {
3200 struct ucred *a_cred;
3204 register struct vattr *vap;
3206 register struct ucred *cred = ap->a_cred;
3207 struct vnode *vp = ap->a_vp;
3208 mode_t mode = ap->a_mode;
3214 * Disallow write attempts on filesystems mounted read-only;
3215 * unless the file is a socket, fifo, or a block or character
3216 * device resident on the filesystem.
3218 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3219 switch (vp->v_type) {
3229 * If you're the super-user,
3230 * you always get access.
3232 if (cred->cr_uid == 0)
3235 error = VOP_GETATTR(vp, vap, cred, ap->a_p);
3239 * Access check is based on only one of owner, group, public.
3240 * If not owner, then check group. If not a member of the
3241 * group, then check public access.
3243 if (cred->cr_uid != vap->va_uid) {
3245 gp = cred->cr_groups;
3246 for (i = 0; i < cred->cr_ngroups; i++, gp++)
3247 if (vap->va_gid == *gp)
3253 error = (vap->va_mode & mode) == mode ? 0 : EACCES;
3258 * Read wrapper for special devices.
3262 struct vop_read_args /* {
3266 struct ucred *a_cred;
3269 register struct nfsnode *np = VTONFS(ap->a_vp);
3275 getnanotime(&np->n_atim);
3276 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap));
3280 * Write wrapper for special devices.
3284 struct vop_write_args /* {
3288 struct ucred *a_cred;
3291 register struct nfsnode *np = VTONFS(ap->a_vp);
3297 getnanotime(&np->n_mtim);
3298 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap));
3302 * Close wrapper for special devices.
3304 * Update the times on the nfsnode then do device close.
3308 struct vop_close_args /* {
3311 struct ucred *a_cred;
3315 register struct vnode *vp = ap->a_vp;
3316 register struct nfsnode *np = VTONFS(vp);
3319 if (np->n_flag & (NACC | NUPD)) {
3321 if (vp->v_usecount == 1 &&
3322 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3324 if (np->n_flag & NACC)
3325 vattr.va_atime = np->n_atim;
3326 if (np->n_flag & NUPD)
3327 vattr.va_mtime = np->n_mtim;
3328 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p);
3331 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap));
3335 * Read wrapper for fifos.
3339 struct vop_read_args /* {
3343 struct ucred *a_cred;
3346 register struct nfsnode *np = VTONFS(ap->a_vp);
3352 getnanotime(&np->n_atim);
3353 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap));
3357 * Write wrapper for fifos.
3361 struct vop_write_args /* {
3365 struct ucred *a_cred;
3368 register struct nfsnode *np = VTONFS(ap->a_vp);
3374 getnanotime(&np->n_mtim);
3375 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap));
3379 * Close wrapper for fifos.
3381 * Update the times on the nfsnode then do fifo close.
3385 struct vop_close_args /* {
3388 struct ucred *a_cred;
3392 register struct vnode *vp = ap->a_vp;
3393 register struct nfsnode *np = VTONFS(vp);
3397 if (np->n_flag & (NACC | NUPD)) {
3399 if (np->n_flag & NACC)
3401 if (np->n_flag & NUPD)
3404 if (vp->v_usecount == 1 &&
3405 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3407 if (np->n_flag & NACC)
3408 vattr.va_atime = np->n_atim;
3409 if (np->n_flag & NUPD)
3410 vattr.va_mtime = np->n_mtim;
3411 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p);
3414 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap));