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 1.4 2003/06/25 03:56:07 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 thread *,int));
109 static int nfs_setattrrpc __P((struct vnode *,struct vattr *,struct ucred *,struct thread *));
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 thread *, 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 thread *td));
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 thread *td));
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 thread *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, int wmode,
279 struct thread *td, struct ucred *cred)
283 int error = 0, attrflag;
285 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
286 caddr_t bpos, dpos, cp2;
287 register int32_t t1, t2;
290 struct nfsnode *np = VTONFS(vp);
292 nfsstats.rpccnt[NFSPROC_ACCESS]++;
293 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED);
295 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
296 *tl = txdr_unsigned(wmode);
297 nfsm_request(vp, NFSPROC_ACCESS, td, cred);
298 nfsm_postop_attr(vp, attrflag);
300 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
301 rmode = fxdr_unsigned(u_int32_t, *tl);
303 np->n_modeuid = cred->cr_uid;
304 np->n_modestamp = time_second;
311 * nfs access vnode op.
312 * For nfs version 2, just return ok. File accesses may fail later.
313 * For nfs version 3, use the access rpc to check accessibility. If file modes
314 * are changed on the server, accesses might still fail later.
318 struct vop_access_args /* {
321 struct ucred *a_cred;
325 register struct vnode *vp = ap->a_vp;
327 u_int32_t mode, wmode;
328 int v3 = NFS_ISV3(vp);
329 struct nfsnode *np = VTONFS(vp);
332 * Disallow write attempts on filesystems mounted read-only;
333 * unless the file is a socket, fifo, or a block or character
334 * device resident on the filesystem.
336 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
337 switch (vp->v_type) {
347 * For nfs v3, check to see if we have done this recently, and if
348 * so return our cached result instead of making an ACCESS call.
349 * If not, do an access rpc, otherwise you are stuck emulating
350 * ufs_access() locally using the vattr. This may not be correct,
351 * since the server may apply other access criteria such as
352 * client uid-->server uid mapping that we do not know about.
355 if (ap->a_mode & VREAD)
356 mode = NFSV3ACCESS_READ;
359 if (vp->v_type != VDIR) {
360 if (ap->a_mode & VWRITE)
361 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
362 if (ap->a_mode & VEXEC)
363 mode |= NFSV3ACCESS_EXECUTE;
365 if (ap->a_mode & VWRITE)
366 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
368 if (ap->a_mode & VEXEC)
369 mode |= NFSV3ACCESS_LOOKUP;
371 /* XXX safety belt, only make blanket request if caching */
372 if (nfsaccess_cache_timeout > 0) {
373 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY |
374 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE |
375 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP;
381 * Does our cached result allow us to give a definite yes to
384 if ((time_second < (np->n_modestamp + nfsaccess_cache_timeout)) &&
385 (ap->a_cred->cr_uid == np->n_modeuid) &&
386 ((np->n_mode & mode) == mode)) {
387 nfsstats.accesscache_hits++;
390 * Either a no, or a don't know. Go to the wire.
392 nfsstats.accesscache_misses++;
393 error = nfs3_access_otw(vp, wmode, ap->a_td,ap->a_cred);
395 if ((np->n_mode & mode) != mode) {
402 if ((error = nfsspec_access(ap)) != 0)
406 * Attempt to prevent a mapped root from accessing a file
407 * which it shouldn't. We try to read a byte from the file
408 * if the user is root and the file is not zero length.
409 * After calling nfsspec_access, we should have the correct
412 if (ap->a_cred->cr_uid == 0 && (ap->a_mode & VREAD)
413 && VTONFS(vp)->n_size > 0) {
420 auio.uio_iov = &aiov;
424 auio.uio_segflg = UIO_SYSSPACE;
425 auio.uio_rw = UIO_READ;
426 auio.uio_td = ap->a_td;
428 if (vp->v_type == VREG)
429 error = nfs_readrpc(vp, &auio, ap->a_cred);
430 else if (vp->v_type == VDIR) {
432 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
434 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
435 error = nfs_readdirrpc(vp, &auio, ap->a_cred);
437 } else if (vp->v_type == VLNK)
438 error = nfs_readlinkrpc(vp, &auio, ap->a_cred);
448 * Check to see if the type is ok
449 * and that deletion is not in progress.
450 * For paged in text files, you will need to flush the page cache
451 * if consistency is lost.
456 struct vop_open_args /* {
459 struct ucred *a_cred;
463 register struct vnode *vp = ap->a_vp;
464 struct nfsnode *np = VTONFS(vp);
465 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
469 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
471 printf("open eacces vtyp=%d\n",vp->v_type);
476 * Get a valid lease. If cached data is stale, flush it.
478 if (nmp->nm_flag & NFSMNT_NQNFS) {
479 if (NQNFS_CKINVALID(vp, np, ND_READ)) {
481 error = nqnfs_getlease(vp, ND_READ, ap->a_cred,
483 } while (error == NQNFS_EXPIRED);
486 if (np->n_lrev != np->n_brev ||
487 (np->n_flag & NQNFSNONCACHE)) {
488 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
489 ap->a_td, 1)) == EINTR)
491 np->n_brev = np->n_lrev;
495 if (np->n_flag & NMODIFIED) {
496 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
497 ap->a_td, 1)) == EINTR)
500 if (vp->v_type == VDIR)
501 np->n_direofoffset = 0;
502 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_td);
505 np->n_mtime = vattr.va_mtime.tv_sec;
507 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_td);
510 if (np->n_mtime != vattr.va_mtime.tv_sec) {
511 if (vp->v_type == VDIR)
512 np->n_direofoffset = 0;
513 if ((error = nfs_vinvalbuf(vp, V_SAVE,
514 ap->a_cred, ap->a_td, 1)) == EINTR)
516 np->n_mtime = vattr.va_mtime.tv_sec;
520 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0)
521 np->n_attrstamp = 0; /* For Open/Close consistency */
527 * What an NFS client should do upon close after writing is a debatable issue.
528 * Most NFS clients push delayed writes to the server upon close, basically for
530 * 1 - So that any write errors may be reported back to the client process
531 * doing the close system call. By far the two most likely errors are
532 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
533 * 2 - To put a worst case upper bound on cache inconsistency between
534 * multiple clients for the file.
535 * There is also a consistency problem for Version 2 of the protocol w.r.t.
536 * not being able to tell if other clients are writing a file concurrently,
537 * since there is no way of knowing if the changed modify time in the reply
538 * is only due to the write for this client.
539 * (NFS Version 3 provides weak cache consistency data in the reply that
540 * should be sufficient to detect and handle this case.)
542 * The current code does the following:
543 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
544 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
545 * or commit them (this satisfies 1 and 2 except for the
546 * case where the server crashes after this close but
547 * before the commit RPC, which is felt to be "good
548 * enough". Changing the last argument to nfs_flush() to
549 * a 1 would force a commit operation, if it is felt a
550 * commit is necessary now.
551 * for NQNFS - do nothing now, since 2 is dealt with via leases and
552 * 1 should be dealt with via an fsync() system call for
553 * cases where write errors are important.
558 struct vop_close_args /* {
559 struct vnodeop_desc *a_desc;
562 struct ucred *a_cred;
566 register struct vnode *vp = ap->a_vp;
567 register struct nfsnode *np = VTONFS(vp);
570 if (vp->v_type == VREG) {
571 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 &&
572 (np->n_flag & NMODIFIED)) {
575 * Under NFSv3 we have dirty buffers to dispose of. We
576 * must flush them to the NFS server. We have the option
577 * of waiting all the way through the commit rpc or just
578 * waiting for the initial write. The default is to only
579 * wait through the initial write so the data is in the
580 * server's cache, which is roughly similar to the state
581 * a standard disk subsystem leaves the file in on close().
583 * We cannot clear the NMODIFIED bit in np->n_flag due to
584 * potential races with other processes, and certainly
585 * cannot clear it if we don't commit.
587 int cm = nfsv3_commit_on_close ? 1 : 0;
588 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_td, cm);
589 /* np->n_flag &= ~NMODIFIED; */
591 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_td, 1);
595 if (np->n_flag & NWRITEERR) {
596 np->n_flag &= ~NWRITEERR;
604 * nfs getattr call from vfs.
608 struct vop_getattr_args /* {
611 struct ucred *a_cred;
615 register struct vnode *vp = ap->a_vp;
616 register struct nfsnode *np = VTONFS(vp);
618 register u_int32_t *tl;
619 register int32_t t1, t2;
622 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
623 int v3 = NFS_ISV3(vp);
626 * Update local times for special files.
628 if (np->n_flag & (NACC | NUPD))
631 * First look in the cache.
633 if (nfs_getattrcache(vp, ap->a_vap) == 0)
636 if (v3 && nfsaccess_cache_timeout > 0) {
637 nfsstats.accesscache_misses++;
638 nfs3_access_otw(vp, NFSV3ACCESS_ALL, ap->a_td, ap->a_cred);
639 if (nfs_getattrcache(vp, ap->a_vap) == 0)
643 nfsstats.rpccnt[NFSPROC_GETATTR]++;
644 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3));
646 nfsm_request(vp, NFSPROC_GETATTR, ap->a_td, ap->a_cred);
648 nfsm_loadattr(vp, ap->a_vap);
659 struct vop_setattr_args /* {
660 struct vnodeop_desc *a_desc;
663 struct ucred *a_cred;
667 register struct vnode *vp = ap->a_vp;
668 register struct nfsnode *np = VTONFS(vp);
669 register struct vattr *vap = ap->a_vap;
678 * Setting of flags is not supported.
680 if (vap->va_flags != VNOVAL)
684 * Disallow write attempts if the filesystem is mounted read-only.
686 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
687 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
688 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
689 (vp->v_mount->mnt_flag & MNT_RDONLY))
691 if (vap->va_size != VNOVAL) {
692 switch (vp->v_type) {
699 if (vap->va_mtime.tv_sec == VNOVAL &&
700 vap->va_atime.tv_sec == VNOVAL &&
701 vap->va_mode == (mode_t)VNOVAL &&
702 vap->va_uid == (uid_t)VNOVAL &&
703 vap->va_gid == (gid_t)VNOVAL)
705 vap->va_size = VNOVAL;
709 * Disallow write attempts if the filesystem is
712 if (vp->v_mount->mnt_flag & MNT_RDONLY)
716 * We run vnode_pager_setsize() early (why?),
717 * we must set np->n_size now to avoid vinvalbuf
718 * V_SAVE races that might setsize a lower
723 error = nfs_meta_setsize(vp, ap->a_cred,
724 ap->a_td, vap->va_size);
726 if (np->n_flag & NMODIFIED) {
727 if (vap->va_size == 0)
728 error = nfs_vinvalbuf(vp, 0,
729 ap->a_cred, ap->a_td, 1);
731 error = nfs_vinvalbuf(vp, V_SAVE,
732 ap->a_cred, ap->a_td, 1);
735 vnode_pager_setsize(vp, np->n_size);
739 np->n_vattr.va_size = vap->va_size;
741 } else if ((vap->va_mtime.tv_sec != VNOVAL ||
742 vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) &&
743 vp->v_type == VREG &&
744 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
745 ap->a_td, 1)) == EINTR)
747 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_td);
748 if (error && vap->va_size != VNOVAL) {
749 np->n_size = np->n_vattr.va_size = tsize;
750 vnode_pager_setsize(vp, np->n_size);
756 * Do an nfs setattr rpc.
759 nfs_setattrrpc(struct vnode *vp, struct vattr *vap,
760 struct ucred *cred, struct thread *td)
762 register struct nfsv2_sattr *sp;
764 register int32_t t1, t2;
765 caddr_t bpos, dpos, cp2;
767 int error = 0, wccflag = NFSV3_WCCRATTR;
768 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
769 int v3 = NFS_ISV3(vp);
771 nfsstats.rpccnt[NFSPROC_SETATTR]++;
772 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3));
775 nfsm_v3attrbuild(vap, TRUE);
776 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
779 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
780 if (vap->va_mode == (mode_t)VNOVAL)
781 sp->sa_mode = nfs_xdrneg1;
783 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
784 if (vap->va_uid == (uid_t)VNOVAL)
785 sp->sa_uid = nfs_xdrneg1;
787 sp->sa_uid = txdr_unsigned(vap->va_uid);
788 if (vap->va_gid == (gid_t)VNOVAL)
789 sp->sa_gid = nfs_xdrneg1;
791 sp->sa_gid = txdr_unsigned(vap->va_gid);
792 sp->sa_size = txdr_unsigned(vap->va_size);
793 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
794 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
796 nfsm_request(vp, NFSPROC_SETATTR, td, cred);
798 nfsm_wcc_data(vp, wccflag);
800 nfsm_loadattr(vp, (struct vattr *)0);
806 * nfs lookup call, one step at a time...
807 * First look in cache
808 * If not found, unlock the directory nfsnode and do the rpc
812 struct vop_lookup_args /* {
813 struct vnodeop_desc *a_desc;
815 struct vnode **a_vpp;
816 struct componentname *a_cnp;
819 struct componentname *cnp = ap->a_cnp;
820 struct vnode *dvp = ap->a_dvp;
821 struct vnode **vpp = ap->a_vpp;
822 int flags = cnp->cn_flags;
827 struct nfsmount *nmp;
828 caddr_t bpos, dpos, cp2;
829 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
833 int lockparent, wantparent, error = 0, attrflag, fhsize;
834 int v3 = NFS_ISV3(dvp);
835 struct thread *td = cnp->cn_td;
838 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
839 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
841 if (dvp->v_type != VDIR)
843 lockparent = flags & LOCKPARENT;
844 wantparent = flags & (LOCKPARENT|WANTPARENT);
845 nmp = VFSTONFS(dvp->v_mount);
847 if ((error = cache_lookup(dvp, vpp, cnp)) && error != ENOENT) {
851 if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0) {
859 * See the comment starting `Step through' in ufs/ufs_lookup.c
860 * for an explanation of the locking protocol
865 } else if (flags & ISDOTDOT) {
866 VOP_UNLOCK(dvp, 0, td);
867 error = vget(newvp, LK_EXCLUSIVE, td);
868 if (!error && lockparent && (flags & ISLASTCN))
869 error = vn_lock(dvp, LK_EXCLUSIVE, td);
871 error = vget(newvp, LK_EXCLUSIVE, td);
872 if (!lockparent || error || !(flags & ISLASTCN))
873 VOP_UNLOCK(dvp, 0, td);
876 if (vpid == newvp->v_id) {
877 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, td)
878 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) {
879 nfsstats.lookupcache_hits++;
880 if (cnp->cn_nameiop != LOOKUP &&
882 cnp->cn_flags |= SAVENAME;
888 if (lockparent && dvp != newvp && (flags & ISLASTCN))
889 VOP_UNLOCK(dvp, 0, td);
891 error = vn_lock(dvp, LK_EXCLUSIVE, td);
898 nfsstats.lookupcache_misses++;
899 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
900 len = cnp->cn_namelen;
901 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
902 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
904 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
905 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_td, cnp->cn_cred);
907 nfsm_postop_attr(dvp, attrflag);
911 nfsm_getfh(fhp, fhsize, v3);
914 * Handle RENAME case...
916 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) {
917 if (NFS_CMPFH(np, fhp, fhsize)) {
921 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
928 nfsm_postop_attr(newvp, attrflag);
929 nfsm_postop_attr(dvp, attrflag);
931 nfsm_loadattr(newvp, (struct vattr *)0);
934 cnp->cn_flags |= SAVENAME;
936 VOP_UNLOCK(dvp, 0, td);
940 if (flags & ISDOTDOT) {
941 VOP_UNLOCK(dvp, 0, td);
942 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
944 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
948 if (lockparent && (flags & ISLASTCN) &&
949 (error = vn_lock(dvp, LK_EXCLUSIVE, td))) {
953 } else if (NFS_CMPFH(np, fhp, fhsize)) {
957 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
962 if (!lockparent || !(flags & ISLASTCN))
963 VOP_UNLOCK(dvp, 0, td);
967 nfsm_postop_attr(newvp, attrflag);
968 nfsm_postop_attr(dvp, attrflag);
970 nfsm_loadattr(newvp, (struct vattr *)0);
971 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
972 cnp->cn_flags |= SAVENAME;
973 if ((cnp->cn_flags & MAKEENTRY) &&
974 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) {
975 np->n_ctime = np->n_vattr.va_ctime.tv_sec;
976 cache_enter(dvp, newvp, cnp);
981 if (newvp != NULLVP) {
985 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
986 (flags & ISLASTCN) && error == ENOENT) {
988 VOP_UNLOCK(dvp, 0, td);
989 if (dvp->v_mount->mnt_flag & MNT_RDONLY)
994 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
995 cnp->cn_flags |= SAVENAME;
1002 * Just call nfs_bioread() to do the work.
1006 struct vop_read_args /* {
1010 struct ucred *a_cred;
1013 register struct vnode *vp = ap->a_vp;
1015 if (vp->v_type != VREG)
1017 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
1025 struct vop_readlink_args /* {
1028 struct ucred *a_cred;
1031 register struct vnode *vp = ap->a_vp;
1033 if (vp->v_type != VLNK)
1035 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred));
1039 * Do a readlink rpc.
1040 * Called by nfs_doio() from below the buffer cache.
1043 nfs_readlinkrpc(vp, uiop, cred)
1044 register struct vnode *vp;
1048 register u_int32_t *tl;
1049 register caddr_t cp;
1050 register int32_t t1, t2;
1051 caddr_t bpos, dpos, cp2;
1052 int error = 0, len, attrflag;
1053 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1054 int v3 = NFS_ISV3(vp);
1056 nfsstats.rpccnt[NFSPROC_READLINK]++;
1057 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3));
1059 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_td, cred);
1061 nfsm_postop_attr(vp, attrflag);
1063 nfsm_strsiz(len, NFS_MAXPATHLEN);
1064 if (len == NFS_MAXPATHLEN) {
1065 struct nfsnode *np = VTONFS(vp);
1066 if (np->n_size && np->n_size < NFS_MAXPATHLEN)
1069 nfsm_mtouio(uiop, len);
1080 nfs_readrpc(vp, uiop, cred)
1081 register struct vnode *vp;
1085 register u_int32_t *tl;
1086 register caddr_t cp;
1087 register int32_t t1, t2;
1088 caddr_t bpos, dpos, cp2;
1089 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1090 struct nfsmount *nmp;
1091 int error = 0, len, retlen, tsiz, eof, attrflag;
1092 int v3 = NFS_ISV3(vp);
1097 nmp = VFSTONFS(vp->v_mount);
1098 tsiz = uiop->uio_resid;
1099 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1102 nfsstats.rpccnt[NFSPROC_READ]++;
1103 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
1104 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3);
1106 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3);
1108 txdr_hyper(uiop->uio_offset, tl);
1109 *(tl + 2) = txdr_unsigned(len);
1111 *tl++ = txdr_unsigned(uiop->uio_offset);
1112 *tl++ = txdr_unsigned(len);
1115 nfsm_request(vp, NFSPROC_READ, uiop->uio_td, cred);
1117 nfsm_postop_attr(vp, attrflag);
1122 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1123 eof = fxdr_unsigned(int, *(tl + 1));
1125 nfsm_loadattr(vp, (struct vattr *)0);
1126 nfsm_strsiz(retlen, nmp->nm_rsize);
1127 nfsm_mtouio(uiop, retlen);
1131 if (eof || retlen == 0) {
1134 } else if (retlen < len) {
1146 nfs_writerpc(vp, uiop, cred, iomode, must_commit)
1147 register struct vnode *vp;
1148 register struct uio *uiop;
1150 int *iomode, *must_commit;
1152 register u_int32_t *tl;
1153 register caddr_t cp;
1154 register int32_t t1, t2, backup;
1155 caddr_t bpos, dpos, cp2;
1156 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1157 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1158 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
1159 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC;
1162 if (uiop->uio_iovcnt != 1)
1163 panic("nfs: writerpc iovcnt > 1");
1166 tsiz = uiop->uio_resid;
1167 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1170 nfsstats.rpccnt[NFSPROC_WRITE]++;
1171 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1172 nfsm_reqhead(vp, NFSPROC_WRITE,
1173 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len));
1176 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
1177 txdr_hyper(uiop->uio_offset, tl);
1179 *tl++ = txdr_unsigned(len);
1180 *tl++ = txdr_unsigned(*iomode);
1181 *tl = txdr_unsigned(len);
1183 register u_int32_t x;
1185 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1186 /* Set both "begin" and "current" to non-garbage. */
1187 x = txdr_unsigned((u_int32_t)uiop->uio_offset);
1188 *tl++ = x; /* "begin offset" */
1189 *tl++ = x; /* "current offset" */
1190 x = txdr_unsigned(len);
1191 *tl++ = x; /* total to this offset */
1192 *tl = x; /* size of this write */
1194 nfsm_uiotom(uiop, len);
1195 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_td, cred);
1197 wccflag = NFSV3_WCCCHK;
1198 nfsm_wcc_data(vp, wccflag);
1200 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
1201 + NFSX_V3WRITEVERF);
1202 rlen = fxdr_unsigned(int, *tl++);
1207 } else if (rlen < len) {
1208 backup = len - rlen;
1209 uiop->uio_iov->iov_base -= backup;
1210 uiop->uio_iov->iov_len += backup;
1211 uiop->uio_offset -= backup;
1212 uiop->uio_resid += backup;
1215 commit = fxdr_unsigned(int, *tl++);
1218 * Return the lowest committment level
1219 * obtained by any of the RPCs.
1221 if (committed == NFSV3WRITE_FILESYNC)
1223 else if (committed == NFSV3WRITE_DATASYNC &&
1224 commit == NFSV3WRITE_UNSTABLE)
1226 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){
1227 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1229 nmp->nm_state |= NFSSTA_HASWRITEVERF;
1230 } else if (bcmp((caddr_t)tl,
1231 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1233 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1238 nfsm_loadattr(vp, (struct vattr *)0);
1240 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec;
1247 if (vp->v_mount->mnt_flag & MNT_ASYNC)
1248 committed = NFSV3WRITE_FILESYNC;
1249 *iomode = committed;
1251 uiop->uio_resid = tsiz;
1257 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1258 * mode set to specify the file type and the size field for rdev.
1261 nfs_mknodrpc(dvp, vpp, cnp, vap)
1262 register struct vnode *dvp;
1263 register struct vnode **vpp;
1264 register struct componentname *cnp;
1265 register struct vattr *vap;
1267 register struct nfsv2_sattr *sp;
1268 register u_int32_t *tl;
1269 register caddr_t cp;
1270 register int32_t t1, t2;
1271 struct vnode *newvp = (struct vnode *)0;
1272 struct nfsnode *np = (struct nfsnode *)0;
1276 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
1277 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1279 int v3 = NFS_ISV3(dvp);
1281 if (vap->va_type == VCHR || vap->va_type == VBLK)
1282 rdev = txdr_unsigned(vap->va_rdev);
1283 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1286 return (EOPNOTSUPP);
1288 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_td)) != 0) {
1291 nfsstats.rpccnt[NFSPROC_MKNOD]++;
1292 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED +
1293 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1294 nfsm_fhtom(dvp, v3);
1295 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1297 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1298 *tl++ = vtonfsv3_type(vap->va_type);
1299 nfsm_v3attrbuild(vap, FALSE);
1300 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1301 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1302 *tl++ = txdr_unsigned(umajor(vap->va_rdev));
1303 *tl = txdr_unsigned(uminor(vap->va_rdev));
1306 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1307 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1308 sp->sa_uid = nfs_xdrneg1;
1309 sp->sa_gid = nfs_xdrneg1;
1311 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1312 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1314 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_td, cnp->cn_cred);
1316 nfsm_mtofh(dvp, newvp, v3, gotvp);
1320 newvp = (struct vnode *)0;
1322 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1323 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1329 nfsm_wcc_data(dvp, wccflag);
1335 if (cnp->cn_flags & MAKEENTRY)
1336 cache_enter(dvp, newvp, cnp);
1339 VTONFS(dvp)->n_flag |= NMODIFIED;
1341 VTONFS(dvp)->n_attrstamp = 0;
1347 * just call nfs_mknodrpc() to do the work.
1352 struct vop_mknod_args /* {
1353 struct vnode *a_dvp;
1354 struct vnode **a_vpp;
1355 struct componentname *a_cnp;
1356 struct vattr *a_vap;
1359 return nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1362 static u_long create_verf;
1364 * nfs file create call
1368 struct vop_create_args /* {
1369 struct vnode *a_dvp;
1370 struct vnode **a_vpp;
1371 struct componentname *a_cnp;
1372 struct vattr *a_vap;
1375 register struct vnode *dvp = ap->a_dvp;
1376 register struct vattr *vap = ap->a_vap;
1377 register struct componentname *cnp = ap->a_cnp;
1378 register struct nfsv2_sattr *sp;
1379 register u_int32_t *tl;
1380 register caddr_t cp;
1381 register int32_t t1, t2;
1382 struct nfsnode *np = (struct nfsnode *)0;
1383 struct vnode *newvp = (struct vnode *)0;
1384 caddr_t bpos, dpos, cp2;
1385 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
1386 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1388 int v3 = NFS_ISV3(dvp);
1391 * Oops, not for me..
1393 if (vap->va_type == VSOCK)
1394 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1396 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_td)) != 0) {
1399 if (vap->va_vaflags & VA_EXCLUSIVE)
1402 nfsstats.rpccnt[NFSPROC_CREATE]++;
1403 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED +
1404 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1405 nfsm_fhtom(dvp, v3);
1406 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1408 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1409 if (fmode & O_EXCL) {
1410 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
1411 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF);
1413 if (!TAILQ_EMPTY(&in_ifaddrhead))
1414 *tl++ = IA_SIN(in_ifaddrhead.tqh_first)->sin_addr.s_addr;
1417 *tl++ = create_verf;
1418 *tl = ++create_verf;
1420 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
1421 nfsm_v3attrbuild(vap, FALSE);
1424 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1425 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1426 sp->sa_uid = nfs_xdrneg1;
1427 sp->sa_gid = nfs_xdrneg1;
1429 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1430 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1432 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_td, cnp->cn_cred);
1434 nfsm_mtofh(dvp, newvp, v3, gotvp);
1438 newvp = (struct vnode *)0;
1440 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1441 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1447 nfsm_wcc_data(dvp, wccflag);
1450 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
1456 } else if (v3 && (fmode & O_EXCL)) {
1458 * We are normally called with only a partially initialized
1459 * VAP. Since the NFSv3 spec says that server may use the
1460 * file attributes to store the verifier, the spec requires
1461 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1462 * in atime, but we can't really assume that all servers will
1463 * so we ensure that our SETATTR sets both atime and mtime.
1465 if (vap->va_mtime.tv_sec == VNOVAL)
1466 vfs_timestamp(&vap->va_mtime);
1467 if (vap->va_atime.tv_sec == VNOVAL)
1468 vap->va_atime = vap->va_mtime;
1469 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td);
1472 if (cnp->cn_flags & MAKEENTRY)
1473 cache_enter(dvp, newvp, cnp);
1476 VTONFS(dvp)->n_flag |= NMODIFIED;
1478 VTONFS(dvp)->n_attrstamp = 0;
1483 * nfs file remove call
1484 * To try and make nfs semantics closer to ufs semantics, a file that has
1485 * other processes using the vnode is renamed instead of removed and then
1486 * removed later on the last close.
1487 * - If v_usecount > 1
1488 * If a rename is not already in the works
1489 * call nfs_sillyrename() to set it up
1495 struct vop_remove_args /* {
1496 struct vnodeop_desc *a_desc;
1497 struct vnode * a_dvp;
1498 struct vnode * a_vp;
1499 struct componentname * a_cnp;
1502 register struct vnode *vp = ap->a_vp;
1503 register struct vnode *dvp = ap->a_dvp;
1504 register struct componentname *cnp = ap->a_cnp;
1505 register struct nfsnode *np = VTONFS(vp);
1510 if ((cnp->cn_flags & HASBUF) == 0)
1511 panic("nfs_remove: no name");
1512 if (vp->v_usecount < 1)
1513 panic("nfs_remove: bad v_usecount");
1515 if (vp->v_type == VDIR)
1517 else if (vp->v_usecount == 1 || (np->n_sillyrename &&
1518 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_td) == 0 &&
1519 vattr.va_nlink > 1)) {
1521 * Purge the name cache so that the chance of a lookup for
1522 * the name succeeding while the remove is in progress is
1523 * minimized. Without node locking it can still happen, such
1524 * that an I/O op returns ESTALE, but since you get this if
1525 * another host removes the file..
1529 * throw away biocache buffers, mainly to avoid
1530 * unnecessary delayed writes later.
1532 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_td, 1);
1535 error = nfs_removerpc(dvp, cnp->cn_nameptr,
1536 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td);
1538 * Kludge City: If the first reply to the remove rpc is lost..
1539 * the reply to the retransmitted request will be ENOENT
1540 * since the file was in fact removed
1541 * Therefore, we cheat and return success.
1543 if (error == ENOENT)
1545 } else if (!np->n_sillyrename)
1546 error = nfs_sillyrename(dvp, vp, cnp);
1547 np->n_attrstamp = 0;
1552 * nfs file remove rpc called from nfs_inactive
1555 nfs_removeit(struct sillyrename *sp)
1558 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen,
1563 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1566 nfs_removerpc(dvp, name, namelen, cred, td)
1573 register u_int32_t *tl;
1574 register caddr_t cp;
1575 register int32_t t1, t2;
1576 caddr_t bpos, dpos, cp2;
1577 int error = 0, wccflag = NFSV3_WCCRATTR;
1578 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1579 int v3 = NFS_ISV3(dvp);
1581 nfsstats.rpccnt[NFSPROC_REMOVE]++;
1582 nfsm_reqhead(dvp, NFSPROC_REMOVE,
1583 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1584 nfsm_fhtom(dvp, v3);
1585 nfsm_strtom(name, namelen, NFS_MAXNAMLEN);
1586 nfsm_request(dvp, NFSPROC_REMOVE, td, cred);
1588 nfsm_wcc_data(dvp, wccflag);
1590 VTONFS(dvp)->n_flag |= NMODIFIED;
1592 VTONFS(dvp)->n_attrstamp = 0;
1597 * nfs file rename call
1601 struct vop_rename_args /* {
1602 struct vnode *a_fdvp;
1603 struct vnode *a_fvp;
1604 struct componentname *a_fcnp;
1605 struct vnode *a_tdvp;
1606 struct vnode *a_tvp;
1607 struct componentname *a_tcnp;
1610 register struct vnode *fvp = ap->a_fvp;
1611 register struct vnode *tvp = ap->a_tvp;
1612 register struct vnode *fdvp = ap->a_fdvp;
1613 register struct vnode *tdvp = ap->a_tdvp;
1614 register struct componentname *tcnp = ap->a_tcnp;
1615 register struct componentname *fcnp = ap->a_fcnp;
1619 if ((tcnp->cn_flags & HASBUF) == 0 ||
1620 (fcnp->cn_flags & HASBUF) == 0)
1621 panic("nfs_rename: no name");
1623 /* Check for cross-device rename */
1624 if ((fvp->v_mount != tdvp->v_mount) ||
1625 (tvp && (fvp->v_mount != tvp->v_mount))) {
1631 * We have to flush B_DELWRI data prior to renaming
1632 * the file. If we don't, the delayed-write buffers
1633 * can be flushed out later after the file has gone stale
1634 * under NFSV3. NFSV2 does not have this problem because
1635 * ( as far as I can tell ) it flushes dirty buffers more
1639 VOP_FSYNC(fvp, fcnp->cn_cred, MNT_WAIT, fcnp->cn_td);
1641 VOP_FSYNC(tvp, tcnp->cn_cred, MNT_WAIT, tcnp->cn_td);
1644 * If the tvp exists and is in use, sillyrename it before doing the
1645 * rename of the new file over it.
1646 * XXX Can't sillyrename a directory.
1648 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename &&
1649 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1654 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1655 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1658 if (fvp->v_type == VDIR) {
1659 if (tvp != NULL && tvp->v_type == VDIR)
1674 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1676 if (error == ENOENT)
1682 * nfs file rename rpc called from nfs_remove() above
1685 nfs_renameit(sdvp, scnp, sp)
1687 struct componentname *scnp;
1688 register struct sillyrename *sp;
1690 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
1691 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td));
1695 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1698 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, td)
1700 const char *fnameptr;
1702 register struct vnode *tdvp;
1703 const char *tnameptr;
1708 register u_int32_t *tl;
1709 register caddr_t cp;
1710 register int32_t t1, t2;
1711 caddr_t bpos, dpos, cp2;
1712 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
1713 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1714 int v3 = NFS_ISV3(fdvp);
1716 nfsstats.rpccnt[NFSPROC_RENAME]++;
1717 nfsm_reqhead(fdvp, NFSPROC_RENAME,
1718 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) +
1719 nfsm_rndup(tnamelen));
1720 nfsm_fhtom(fdvp, v3);
1721 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN);
1722 nfsm_fhtom(tdvp, v3);
1723 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN);
1724 nfsm_request(fdvp, NFSPROC_RENAME, td, cred);
1726 nfsm_wcc_data(fdvp, fwccflag);
1727 nfsm_wcc_data(tdvp, twccflag);
1730 VTONFS(fdvp)->n_flag |= NMODIFIED;
1731 VTONFS(tdvp)->n_flag |= NMODIFIED;
1733 VTONFS(fdvp)->n_attrstamp = 0;
1735 VTONFS(tdvp)->n_attrstamp = 0;
1740 * nfs hard link create call
1744 struct vop_link_args /* {
1745 struct vnode *a_tdvp;
1747 struct componentname *a_cnp;
1750 register struct vnode *vp = ap->a_vp;
1751 register struct vnode *tdvp = ap->a_tdvp;
1752 register struct componentname *cnp = ap->a_cnp;
1753 register u_int32_t *tl;
1754 register caddr_t cp;
1755 register int32_t t1, t2;
1756 caddr_t bpos, dpos, cp2;
1757 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
1758 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1761 if (vp->v_mount != tdvp->v_mount) {
1766 * Push all writes to the server, so that the attribute cache
1767 * doesn't get "out of sync" with the server.
1768 * XXX There should be a better way!
1770 VOP_FSYNC(vp, cnp->cn_cred, MNT_WAIT, cnp->cn_td);
1773 nfsstats.rpccnt[NFSPROC_LINK]++;
1774 nfsm_reqhead(vp, NFSPROC_LINK,
1775 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
1777 nfsm_fhtom(tdvp, v3);
1778 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1779 nfsm_request(vp, NFSPROC_LINK, cnp->cn_td, cnp->cn_cred);
1781 nfsm_postop_attr(vp, attrflag);
1782 nfsm_wcc_data(tdvp, wccflag);
1785 VTONFS(tdvp)->n_flag |= NMODIFIED;
1787 VTONFS(vp)->n_attrstamp = 0;
1789 VTONFS(tdvp)->n_attrstamp = 0;
1791 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1793 if (error == EEXIST)
1799 * nfs symbolic link create call
1803 struct vop_symlink_args /* {
1804 struct vnode *a_dvp;
1805 struct vnode **a_vpp;
1806 struct componentname *a_cnp;
1807 struct vattr *a_vap;
1811 register struct vnode *dvp = ap->a_dvp;
1812 register struct vattr *vap = ap->a_vap;
1813 register struct componentname *cnp = ap->a_cnp;
1814 register struct nfsv2_sattr *sp;
1815 register u_int32_t *tl;
1816 register caddr_t cp;
1817 register int32_t t1, t2;
1818 caddr_t bpos, dpos, cp2;
1819 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
1820 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1821 struct vnode *newvp = (struct vnode *)0;
1822 int v3 = NFS_ISV3(dvp);
1824 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1825 slen = strlen(ap->a_target);
1826 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED +
1827 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3));
1828 nfsm_fhtom(dvp, v3);
1829 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1831 nfsm_v3attrbuild(vap, FALSE);
1833 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
1835 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1836 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
1837 sp->sa_uid = nfs_xdrneg1;
1838 sp->sa_gid = nfs_xdrneg1;
1839 sp->sa_size = nfs_xdrneg1;
1840 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1841 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1845 * Issue the NFS request and get the rpc response.
1847 * Only NFSv3 responses returning an error of 0 actually return
1848 * a file handle that can be converted into newvp without having
1849 * to do an extra lookup rpc.
1851 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_td, cnp->cn_cred);
1854 nfsm_mtofh(dvp, newvp, v3, gotvp);
1855 nfsm_wcc_data(dvp, wccflag);
1859 * out code jumps -> here, mrep is also freed.
1865 * If we get an EEXIST error, silently convert it to no-error
1866 * in case of an NFS retry.
1868 if (error == EEXIST)
1872 * If we do not have (or no longer have) an error, and we could
1873 * not extract the newvp from the response due to the request being
1874 * NFSv2 or the error being EEXIST. We have to do a lookup in order
1875 * to obtain a newvp to return.
1877 if (error == 0 && newvp == NULL) {
1878 struct nfsnode *np = NULL;
1880 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1881 cnp->cn_cred, cnp->cn_td, &np);
1891 VTONFS(dvp)->n_flag |= NMODIFIED;
1893 VTONFS(dvp)->n_attrstamp = 0;
1902 struct vop_mkdir_args /* {
1903 struct vnode *a_dvp;
1904 struct vnode **a_vpp;
1905 struct componentname *a_cnp;
1906 struct vattr *a_vap;
1909 register struct vnode *dvp = ap->a_dvp;
1910 register struct vattr *vap = ap->a_vap;
1911 register struct componentname *cnp = ap->a_cnp;
1912 register struct nfsv2_sattr *sp;
1913 register u_int32_t *tl;
1914 register caddr_t cp;
1915 register int32_t t1, t2;
1917 struct nfsnode *np = (struct nfsnode *)0;
1918 struct vnode *newvp = (struct vnode *)0;
1919 caddr_t bpos, dpos, cp2;
1920 int error = 0, wccflag = NFSV3_WCCRATTR;
1922 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1924 int v3 = NFS_ISV3(dvp);
1926 if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_td)) != 0) {
1929 len = cnp->cn_namelen;
1930 nfsstats.rpccnt[NFSPROC_MKDIR]++;
1931 nfsm_reqhead(dvp, NFSPROC_MKDIR,
1932 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3));
1933 nfsm_fhtom(dvp, v3);
1934 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
1936 nfsm_v3attrbuild(vap, FALSE);
1938 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1939 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
1940 sp->sa_uid = nfs_xdrneg1;
1941 sp->sa_gid = nfs_xdrneg1;
1942 sp->sa_size = nfs_xdrneg1;
1943 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1944 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1946 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_td, cnp->cn_cred);
1948 nfsm_mtofh(dvp, newvp, v3, gotvp);
1950 nfsm_wcc_data(dvp, wccflag);
1952 VTONFS(dvp)->n_flag |= NMODIFIED;
1954 VTONFS(dvp)->n_attrstamp = 0;
1956 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
1957 * if we can succeed in looking up the directory.
1959 if (error == EEXIST || (!error && !gotvp)) {
1962 newvp = (struct vnode *)0;
1964 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
1968 if (newvp->v_type != VDIR)
1981 * nfs remove directory call
1985 struct vop_rmdir_args /* {
1986 struct vnode *a_dvp;
1988 struct componentname *a_cnp;
1991 register struct vnode *vp = ap->a_vp;
1992 register struct vnode *dvp = ap->a_dvp;
1993 register struct componentname *cnp = ap->a_cnp;
1994 register u_int32_t *tl;
1995 register caddr_t cp;
1996 register int32_t t1, t2;
1997 caddr_t bpos, dpos, cp2;
1998 int error = 0, wccflag = NFSV3_WCCRATTR;
1999 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2000 int v3 = NFS_ISV3(dvp);
2004 nfsstats.rpccnt[NFSPROC_RMDIR]++;
2005 nfsm_reqhead(dvp, NFSPROC_RMDIR,
2006 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
2007 nfsm_fhtom(dvp, v3);
2008 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
2009 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_td, cnp->cn_cred);
2011 nfsm_wcc_data(dvp, wccflag);
2013 VTONFS(dvp)->n_flag |= NMODIFIED;
2015 VTONFS(dvp)->n_attrstamp = 0;
2019 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2021 if (error == ENOENT)
2031 struct vop_readdir_args /* {
2034 struct ucred *a_cred;
2037 register struct vnode *vp = ap->a_vp;
2038 register struct nfsnode *np = VTONFS(vp);
2039 register struct uio *uio = ap->a_uio;
2043 if (vp->v_type != VDIR)
2046 * First, check for hit on the EOF offset cache
2048 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2049 (np->n_flag & NMODIFIED) == 0) {
2050 if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) {
2051 if (NQNFS_CKCACHABLE(vp, ND_READ)) {
2052 nfsstats.direofcache_hits++;
2055 } else if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_td) == 0 &&
2056 np->n_mtime == vattr.va_mtime.tv_sec) {
2057 nfsstats.direofcache_hits++;
2063 * Call nfs_bioread() to do the real work.
2065 tresid = uio->uio_resid;
2066 error = nfs_bioread(vp, uio, 0, ap->a_cred);
2068 if (!error && uio->uio_resid == tresid)
2069 nfsstats.direofcache_misses++;
2075 * Called from below the buffer cache by nfs_doio().
2078 nfs_readdirrpc(vp, uiop, cred)
2080 register struct uio *uiop;
2084 register int len, left;
2085 register struct dirent *dp = NULL;
2086 register u_int32_t *tl;
2087 register caddr_t cp;
2088 register int32_t t1, t2;
2089 register nfsuint64 *cookiep;
2090 caddr_t bpos, dpos, cp2;
2091 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2093 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2094 struct nfsnode *dnp = VTONFS(vp);
2096 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2098 int v3 = NFS_ISV3(vp);
2101 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2102 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2103 panic("nfs readdirrpc bad uio");
2107 * If there is no cookie, assume directory was stale.
2109 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2113 return (NFSERR_BAD_COOKIE);
2115 * Loop around doing readdir rpc's of size nm_readdirsize
2116 * truncated to a multiple of DIRBLKSIZ.
2117 * The stopping criteria is EOF or buffer full.
2119 while (more_dirs && bigenough) {
2120 nfsstats.rpccnt[NFSPROC_READDIR]++;
2121 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) +
2125 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
2126 *tl++ = cookie.nfsuquad[0];
2127 *tl++ = cookie.nfsuquad[1];
2128 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2129 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2131 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2132 *tl++ = cookie.nfsuquad[0];
2134 *tl = txdr_unsigned(nmp->nm_readdirsize);
2135 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_td, cred);
2137 nfsm_postop_attr(vp, attrflag);
2139 nfsm_dissect(tl, u_int32_t *,
2141 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2142 dnp->n_cookieverf.nfsuquad[1] = *tl;
2148 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2149 more_dirs = fxdr_unsigned(int, *tl);
2151 /* loop thru the dir entries, doctoring them to 4bsd form */
2152 while (more_dirs && bigenough) {
2154 nfsm_dissect(tl, u_int32_t *,
2156 fileno = fxdr_hyper(tl);
2157 len = fxdr_unsigned(int, *(tl + 2));
2159 nfsm_dissect(tl, u_int32_t *,
2161 fileno = fxdr_unsigned(u_quad_t, *tl++);
2162 len = fxdr_unsigned(int, *tl);
2164 if (len <= 0 || len > NFS_MAXNAMLEN) {
2169 tlen = nfsm_rndup(len);
2171 tlen += 4; /* To ensure null termination */
2172 left = DIRBLKSIZ - blksiz;
2173 if ((tlen + DIRHDSIZ) > left) {
2174 dp->d_reclen += left;
2175 uiop->uio_iov->iov_base += left;
2176 uiop->uio_iov->iov_len -= left;
2177 uiop->uio_offset += left;
2178 uiop->uio_resid -= left;
2181 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2184 dp = (struct dirent *)uiop->uio_iov->iov_base;
2185 dp->d_fileno = (int)fileno;
2187 dp->d_reclen = tlen + DIRHDSIZ;
2188 dp->d_type = DT_UNKNOWN;
2189 blksiz += dp->d_reclen;
2190 if (blksiz == DIRBLKSIZ)
2192 uiop->uio_offset += DIRHDSIZ;
2193 uiop->uio_resid -= DIRHDSIZ;
2194 uiop->uio_iov->iov_base += DIRHDSIZ;
2195 uiop->uio_iov->iov_len -= DIRHDSIZ;
2196 nfsm_mtouio(uiop, len);
2197 cp = uiop->uio_iov->iov_base;
2199 *cp = '\0'; /* null terminate */
2200 uiop->uio_iov->iov_base += tlen;
2201 uiop->uio_iov->iov_len -= tlen;
2202 uiop->uio_offset += tlen;
2203 uiop->uio_resid -= tlen;
2205 nfsm_adv(nfsm_rndup(len));
2207 nfsm_dissect(tl, u_int32_t *,
2210 nfsm_dissect(tl, u_int32_t *,
2214 cookie.nfsuquad[0] = *tl++;
2216 cookie.nfsuquad[1] = *tl++;
2221 more_dirs = fxdr_unsigned(int, *tl);
2224 * If at end of rpc data, get the eof boolean
2227 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2228 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2233 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2234 * by increasing d_reclen for the last record.
2237 left = DIRBLKSIZ - blksiz;
2238 dp->d_reclen += left;
2239 uiop->uio_iov->iov_base += left;
2240 uiop->uio_iov->iov_len -= left;
2241 uiop->uio_offset += left;
2242 uiop->uio_resid -= left;
2246 * We are now either at the end of the directory or have filled the
2250 dnp->n_direofoffset = uiop->uio_offset;
2252 if (uiop->uio_resid > 0)
2253 printf("EEK! readdirrpc resid > 0\n");
2254 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2262 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2265 nfs_readdirplusrpc(vp, uiop, cred)
2267 register struct uio *uiop;
2270 register int len, left;
2271 register struct dirent *dp;
2272 register u_int32_t *tl;
2273 register caddr_t cp;
2274 register int32_t t1, t2;
2275 register struct vnode *newvp;
2276 register nfsuint64 *cookiep;
2277 caddr_t bpos, dpos, cp2, dpossav1, dpossav2;
2278 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2;
2279 struct nameidata nami, *ndp = &nami;
2280 struct componentname *cnp = &ndp->ni_cnd;
2282 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2283 struct nfsnode *dnp = VTONFS(vp), *np;
2286 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2287 int attrflag, fhsize;
2290 dp = (struct dirent *)0;
2293 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2294 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2295 panic("nfs readdirplusrpc bad uio");
2301 * If there is no cookie, assume directory was stale.
2303 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2307 return (NFSERR_BAD_COOKIE);
2309 * Loop around doing readdir rpc's of size nm_readdirsize
2310 * truncated to a multiple of DIRBLKSIZ.
2311 * The stopping criteria is EOF or buffer full.
2313 while (more_dirs && bigenough) {
2314 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
2315 nfsm_reqhead(vp, NFSPROC_READDIRPLUS,
2316 NFSX_FH(1) + 6 * NFSX_UNSIGNED);
2318 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
2319 *tl++ = cookie.nfsuquad[0];
2320 *tl++ = cookie.nfsuquad[1];
2321 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2322 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2323 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2324 *tl = txdr_unsigned(nmp->nm_rsize);
2325 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_td, cred);
2326 nfsm_postop_attr(vp, attrflag);
2331 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2332 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2333 dnp->n_cookieverf.nfsuquad[1] = *tl++;
2334 more_dirs = fxdr_unsigned(int, *tl);
2336 /* loop thru the dir entries, doctoring them to 4bsd form */
2337 while (more_dirs && bigenough) {
2338 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2339 fileno = fxdr_hyper(tl);
2340 len = fxdr_unsigned(int, *(tl + 2));
2341 if (len <= 0 || len > NFS_MAXNAMLEN) {
2346 tlen = nfsm_rndup(len);
2348 tlen += 4; /* To ensure null termination*/
2349 left = DIRBLKSIZ - blksiz;
2350 if ((tlen + DIRHDSIZ) > left) {
2351 dp->d_reclen += left;
2352 uiop->uio_iov->iov_base += left;
2353 uiop->uio_iov->iov_len -= left;
2354 uiop->uio_offset += left;
2355 uiop->uio_resid -= left;
2358 if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2361 dp = (struct dirent *)uiop->uio_iov->iov_base;
2362 dp->d_fileno = (int)fileno;
2364 dp->d_reclen = tlen + DIRHDSIZ;
2365 dp->d_type = DT_UNKNOWN;
2366 blksiz += dp->d_reclen;
2367 if (blksiz == DIRBLKSIZ)
2369 uiop->uio_offset += DIRHDSIZ;
2370 uiop->uio_resid -= DIRHDSIZ;
2371 uiop->uio_iov->iov_base += DIRHDSIZ;
2372 uiop->uio_iov->iov_len -= DIRHDSIZ;
2373 cnp->cn_nameptr = uiop->uio_iov->iov_base;
2374 cnp->cn_namelen = len;
2375 nfsm_mtouio(uiop, len);
2376 cp = uiop->uio_iov->iov_base;
2379 uiop->uio_iov->iov_base += tlen;
2380 uiop->uio_iov->iov_len -= tlen;
2381 uiop->uio_offset += tlen;
2382 uiop->uio_resid -= tlen;
2384 nfsm_adv(nfsm_rndup(len));
2385 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2387 cookie.nfsuquad[0] = *tl++;
2388 cookie.nfsuquad[1] = *tl++;
2393 * Since the attributes are before the file handle
2394 * (sigh), we must skip over the attributes and then
2395 * come back and get them.
2397 attrflag = fxdr_unsigned(int, *tl);
2401 nfsm_adv(NFSX_V3FATTR);
2402 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2403 doit = fxdr_unsigned(int, *tl);
2405 nfsm_getfh(fhp, fhsize, 1);
2406 if (NFS_CMPFH(dnp, fhp, fhsize)) {
2411 error = nfs_nget(vp->v_mount, fhp,
2419 if (doit && bigenough) {
2424 nfsm_loadattr(newvp, (struct vattr *)0);
2428 IFTODT(VTTOIF(np->n_vattr.va_type));
2430 cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp);
2433 /* Just skip over the file handle */
2434 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2435 i = fxdr_unsigned(int, *tl);
2436 nfsm_adv(nfsm_rndup(i));
2438 if (newvp != NULLVP) {
2445 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2446 more_dirs = fxdr_unsigned(int, *tl);
2449 * If at end of rpc data, get the eof boolean
2452 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2453 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2458 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2459 * by increasing d_reclen for the last record.
2462 left = DIRBLKSIZ - blksiz;
2463 dp->d_reclen += left;
2464 uiop->uio_iov->iov_base += left;
2465 uiop->uio_iov->iov_len -= left;
2466 uiop->uio_offset += left;
2467 uiop->uio_resid -= left;
2471 * We are now either at the end of the directory or have filled the
2475 dnp->n_direofoffset = uiop->uio_offset;
2477 if (uiop->uio_resid > 0)
2478 printf("EEK! readdirplusrpc resid > 0\n");
2479 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2483 if (newvp != NULLVP) {
2494 * Silly rename. To make the NFS filesystem that is stateless look a little
2495 * more like the "ufs" a remove of an active vnode is translated to a rename
2496 * to a funny looking filename that is removed by nfs_inactive on the
2497 * nfsnode. There is the potential for another process on a different client
2498 * to create the same funny name between the nfs_lookitup() fails and the
2499 * nfs_rename() completes, but...
2502 nfs_sillyrename(dvp, vp, cnp)
2503 struct vnode *dvp, *vp;
2504 struct componentname *cnp;
2506 register struct sillyrename *sp;
2513 if (vp->v_type == VDIR)
2514 panic("nfs: sillyrename dir");
2516 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2517 M_NFSREQ, M_WAITOK);
2518 sp->s_cred = crdup(cnp->cn_cred);
2522 /* Fudge together a funny name */
2523 sp->s_namlen = sprintf(sp->s_name, ".nfsA%08x4.4", (int)cnp->cn_td);
2525 /* Try lookitups until we get one that isn't there */
2526 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2527 cnp->cn_td, (struct nfsnode **)0) == 0) {
2529 if (sp->s_name[4] > 'z') {
2534 error = nfs_renameit(dvp, cnp, sp);
2537 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2539 np->n_sillyrename = sp;
2544 free((caddr_t)sp, M_NFSREQ);
2549 * Look up a file name and optionally either update the file handle or
2550 * allocate an nfsnode, depending on the value of npp.
2551 * npp == NULL --> just do the lookup
2552 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2554 * *npp != NULL --> update the file handle in the vnode
2557 nfs_lookitup(dvp, name, len, cred, td, npp)
2558 register struct vnode *dvp;
2563 struct nfsnode **npp;
2565 register u_int32_t *tl;
2566 register caddr_t cp;
2567 register int32_t t1, t2;
2568 struct vnode *newvp = (struct vnode *)0;
2569 struct nfsnode *np, *dnp = VTONFS(dvp);
2570 caddr_t bpos, dpos, cp2;
2571 int error = 0, fhlen, attrflag;
2572 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2574 int v3 = NFS_ISV3(dvp);
2576 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
2577 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
2578 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2579 nfsm_fhtom(dvp, v3);
2580 nfsm_strtom(name, len, NFS_MAXNAMLEN);
2581 nfsm_request(dvp, NFSPROC_LOOKUP, td, cred);
2582 if (npp && !error) {
2583 nfsm_getfh(nfhp, fhlen, v3);
2586 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2587 free((caddr_t)np->n_fhp, M_NFSBIGFH);
2588 np->n_fhp = &np->n_fh;
2589 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2590 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK);
2591 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2592 np->n_fhsize = fhlen;
2594 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
2598 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
2606 nfsm_postop_attr(newvp, attrflag);
2607 if (!attrflag && *npp == NULL) {
2616 nfsm_loadattr(newvp, (struct vattr *)0);
2619 if (npp && *npp == NULL) {
2634 * Nfs Version 3 commit rpc
2637 nfs_commit(vp, offset, cnt, cred, td)
2644 register caddr_t cp;
2645 register u_int32_t *tl;
2646 register int32_t t1, t2;
2647 register struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2648 caddr_t bpos, dpos, cp2;
2649 int error = 0, wccflag = NFSV3_WCCRATTR;
2650 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2652 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
2654 nfsstats.rpccnt[NFSPROC_COMMIT]++;
2655 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1));
2657 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2658 txdr_hyper(offset, tl);
2660 *tl = txdr_unsigned(cnt);
2661 nfsm_request(vp, NFSPROC_COMMIT, td, cred);
2662 nfsm_wcc_data(vp, wccflag);
2664 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF);
2665 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
2666 NFSX_V3WRITEVERF)) {
2667 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
2669 error = NFSERR_STALEWRITEVERF;
2678 * - make nfs_bmap() essentially a no-op that does no translation
2679 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
2680 * (Maybe I could use the process's page mapping, but I was concerned that
2681 * Kernel Write might not be enabled and also figured copyout() would do
2682 * a lot more work than bcopy() and also it currently happens in the
2683 * context of the swapper process (2).
2687 struct vop_bmap_args /* {
2690 struct vnode **a_vpp;
2696 register struct vnode *vp = ap->a_vp;
2698 if (ap->a_vpp != NULL)
2700 if (ap->a_bnp != NULL)
2701 *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize);
2702 if (ap->a_runp != NULL)
2704 if (ap->a_runb != NULL)
2711 * For async requests when nfsiod(s) are running, queue the request by
2712 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the
2717 struct vop_strategy_args *ap;
2719 register struct buf *bp = ap->a_bp;
2724 KASSERT(!(bp->b_flags & B_DONE), ("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
2725 KASSERT(BUF_REFCNT(bp) > 0, ("nfs_strategy: buffer %p not locked", bp));
2727 if (bp->b_flags & B_PHYS)
2728 panic("nfs physio");
2730 if (bp->b_flags & B_ASYNC)
2733 td = curthread; /* XXX */
2735 if (bp->b_flags & B_READ)
2741 * If the op is asynchronous and an i/o daemon is waiting
2742 * queue the request, wake it up and wait for completion
2743 * otherwise just do it ourselves.
2745 if ((bp->b_flags & B_ASYNC) == 0 ||
2746 nfs_asyncio(bp, NOCRED, td))
2747 error = nfs_doio(bp, cr, td);
2754 * NB Currently unsupported.
2759 struct vop_mmap_args /* {
2762 struct ucred *a_cred;
2763 struct thread *a_td;
2771 * fsync vnode op. Just call nfs_flush() with commit == 1.
2776 struct vop_fsync_args /* {
2777 struct vnodeop_desc *a_desc;
2778 struct vnode * a_vp;
2779 struct ucred * a_cred;
2781 struct thread * a_td;
2785 return (nfs_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_td, 1));
2789 * Flush all the blocks associated with a vnode.
2790 * Walk through the buffer pool and push any dirty pages
2791 * associated with the vnode.
2794 nfs_flush(vp, cred, waitfor, td, commit)
2795 register struct vnode *vp;
2801 register struct nfsnode *np = VTONFS(vp);
2802 register struct buf *bp;
2805 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2806 int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2808 u_quad_t off, endoff, toff;
2809 struct ucred* wcred = NULL;
2810 struct buf **bvec = NULL;
2811 #ifndef NFS_COMMITBVECSIZ
2812 #define NFS_COMMITBVECSIZ 20
2814 struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2815 int bvecsize = 0, bveccount;
2817 if (nmp->nm_flag & NFSMNT_INT)
2822 * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2823 * server, but nas not been committed to stable storage on the server
2824 * yet. On the first pass, the byte range is worked out and the commit
2825 * rpc is done. On the second pass, nfs_writebp() is called to do the
2832 if (NFS_ISV3(vp) && commit) {
2835 * Count up how many buffers waiting for a commit.
2838 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2839 nbp = TAILQ_NEXT(bp, b_vnbufs);
2840 if (BUF_REFCNT(bp) == 0 &&
2841 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2842 == (B_DELWRI | B_NEEDCOMMIT))
2846 * Allocate space to remember the list of bufs to commit. It is
2847 * important to use M_NOWAIT here to avoid a race with nfs_write.
2848 * If we can't get memory (for whatever reason), we will end up
2849 * committing the buffers one-by-one in the loop below.
2851 if (bvec != NULL && bvec != bvec_on_stack)
2853 if (bveccount > NFS_COMMITBVECSIZ) {
2854 bvec = (struct buf **)
2855 malloc(bveccount * sizeof(struct buf *),
2858 bvec = bvec_on_stack;
2859 bvecsize = NFS_COMMITBVECSIZ;
2861 bvecsize = bveccount;
2863 bvec = bvec_on_stack;
2864 bvecsize = NFS_COMMITBVECSIZ;
2866 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2867 nbp = TAILQ_NEXT(bp, b_vnbufs);
2868 if (bvecpos >= bvecsize)
2870 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
2871 (B_DELWRI | B_NEEDCOMMIT) ||
2872 BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
2876 * Work out if all buffers are using the same cred
2877 * so we can deal with them all with one commit.
2879 * NOTE: we are not clearing B_DONE here, so we have
2880 * to do it later on in this routine if we intend to
2881 * initiate I/O on the bp.
2883 * Note: to avoid loopback deadlocks, we do not
2884 * assign b_runningbufspace.
2887 wcred = bp->b_wcred;
2888 else if (wcred != bp->b_wcred)
2890 bp->b_flags |= B_WRITEINPROG;
2891 vfs_busy_pages(bp, 1);
2894 * bp is protected by being locked, but nbp is not
2895 * and vfs_busy_pages() may sleep. We have to
2898 nbp = TAILQ_NEXT(bp, b_vnbufs);
2901 * A list of these buffers is kept so that the
2902 * second loop knows which buffers have actually
2903 * been committed. This is necessary, since there
2904 * may be a race between the commit rpc and new
2905 * uncommitted writes on the file.
2907 bvec[bvecpos++] = bp;
2908 toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2912 toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2920 * Commit data on the server, as required.
2921 * If all bufs are using the same wcred, then use that with
2922 * one call for all of them, otherwise commit each one
2925 if (wcred != NOCRED)
2926 retv = nfs_commit(vp, off, (int)(endoff - off),
2930 for (i = 0; i < bvecpos; i++) {
2933 off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2935 size = (u_quad_t)(bp->b_dirtyend
2937 retv = nfs_commit(vp, off, (int)size,
2943 if (retv == NFSERR_STALEWRITEVERF)
2944 nfs_clearcommit(vp->v_mount);
2947 * Now, either mark the blocks I/O done or mark the
2948 * blocks dirty, depending on whether the commit
2951 for (i = 0; i < bvecpos; i++) {
2953 bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG | B_CLUSTEROK);
2956 * Error, leave B_DELWRI intact
2958 vfs_unbusy_pages(bp);
2962 * Success, remove B_DELWRI ( bundirty() ).
2964 * b_dirtyoff/b_dirtyend seem to be NFS
2965 * specific. We should probably move that
2966 * into bundirty(). XXX
2970 bp->b_flags |= B_ASYNC;
2972 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR);
2973 bp->b_dirtyoff = bp->b_dirtyend = 0;
2981 * Start/do any write(s) that are required.
2985 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2986 nbp = TAILQ_NEXT(bp, b_vnbufs);
2987 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) {
2988 if (waitfor != MNT_WAIT || passone)
2990 error = BUF_TIMELOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL,
2991 "nfsfsync", slpflag, slptimeo);
2994 panic("nfs_fsync: inconsistent lock");
2995 if (error == ENOLCK)
2997 if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) {
3001 if (slpflag == PCATCH) {
3007 if ((bp->b_flags & B_DELWRI) == 0)
3008 panic("nfs_fsync: not dirty");
3009 if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
3014 if (passone || !commit)
3015 bp->b_flags |= B_ASYNC;
3017 bp->b_flags |= B_ASYNC | B_WRITEINPROG;
3019 VOP_BWRITE(bp->b_vp, bp);
3027 if (waitfor == MNT_WAIT) {
3028 while (vp->v_numoutput) {
3029 vp->v_flag |= VBWAIT;
3030 error = tsleep((caddr_t)&vp->v_numoutput,
3031 slpflag | (PRIBIO + 1), "nfsfsync", slptimeo);
3033 if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) {
3037 if (slpflag == PCATCH) {
3043 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd) && commit) {
3047 if (np->n_flag & NWRITEERR) {
3048 error = np->n_error;
3049 np->n_flag &= ~NWRITEERR;
3052 if (bvec != NULL && bvec != bvec_on_stack)
3058 * NFS advisory byte-level locks.
3059 * Currently unsupported.
3063 struct vop_advlock_args /* {
3071 register struct nfsnode *np = VTONFS(ap->a_vp);
3074 * The following kludge is to allow diskless support to work
3075 * until a real NFS lockd is implemented. Basically, just pretend
3076 * that this is a local lock.
3078 return (lf_advlock(ap, &(np->n_lockf), np->n_size));
3082 * Print out the contents of an nfsnode.
3086 struct vop_print_args /* {
3090 register struct vnode *vp = ap->a_vp;
3091 register struct nfsnode *np = VTONFS(vp);
3093 printf("tag VT_NFS, fileid %ld fsid 0x%x",
3094 np->n_vattr.va_fileid, np->n_vattr.va_fsid);
3095 if (vp->v_type == VFIFO)
3102 * Just call nfs_writebp() with the force argument set to 1.
3104 * NOTE: B_DONE may or may not be set in a_bp on call.
3108 struct vop_bwrite_args /* {
3112 return (nfs_writebp(ap->a_bp, 1, curthread));
3116 * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless
3117 * the force flag is one and it also handles the B_NEEDCOMMIT flag. We set
3118 * B_CACHE if this is a VMIO buffer.
3121 nfs_writebp(bp, force, td)
3122 register struct buf *bp;
3127 int oldflags = bp->b_flags;
3133 if (BUF_REFCNT(bp) == 0)
3134 panic("bwrite: buffer is not locked???");
3136 if (bp->b_flags & B_INVAL) {
3141 bp->b_flags |= B_CACHE;
3144 * Undirty the bp. We will redirty it later if the I/O fails.
3149 bp->b_flags &= ~(B_READ|B_DONE|B_ERROR);
3151 bp->b_vp->v_numoutput++;
3152 curproc->p_stats->p_ru.ru_oublock++;
3156 * Note: to avoid loopback deadlocks, we do not
3157 * assign b_runningbufspace.
3159 vfs_busy_pages(bp, 1);
3162 bp->b_flags |= B_WRITEINPROG;
3164 VOP_STRATEGY(bp->b_vp, bp);
3166 if( (oldflags & B_ASYNC) == 0) {
3167 int rtval = biowait(bp);
3169 if (oldflags & B_DELWRI) {
3171 reassignbuf(bp, bp->b_vp);
3183 * nfs special file access vnode op.
3184 * Essentially just get vattr and then imitate iaccess() since the device is
3185 * local to the client.
3189 struct vop_access_args /* {
3192 struct ucred *a_cred;
3193 struct thread *a_td;
3196 register struct vattr *vap;
3198 register struct ucred *cred = ap->a_cred;
3199 struct vnode *vp = ap->a_vp;
3200 mode_t mode = ap->a_mode;
3206 * Disallow write attempts on filesystems mounted read-only;
3207 * unless the file is a socket, fifo, or a block or character
3208 * device resident on the filesystem.
3210 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3211 switch (vp->v_type) {
3221 * If you're the super-user,
3222 * you always get access.
3224 if (cred->cr_uid == 0)
3227 error = VOP_GETATTR(vp, vap, cred, ap->a_td);
3231 * Access check is based on only one of owner, group, public.
3232 * If not owner, then check group. If not a member of the
3233 * group, then check public access.
3235 if (cred->cr_uid != vap->va_uid) {
3237 gp = cred->cr_groups;
3238 for (i = 0; i < cred->cr_ngroups; i++, gp++)
3239 if (vap->va_gid == *gp)
3245 error = (vap->va_mode & mode) == mode ? 0 : EACCES;
3250 * Read wrapper for special devices.
3254 struct vop_read_args /* {
3258 struct ucred *a_cred;
3261 register struct nfsnode *np = VTONFS(ap->a_vp);
3267 getnanotime(&np->n_atim);
3268 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap));
3272 * Write wrapper for special devices.
3276 struct vop_write_args /* {
3280 struct ucred *a_cred;
3283 register struct nfsnode *np = VTONFS(ap->a_vp);
3289 getnanotime(&np->n_mtim);
3290 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap));
3294 * Close wrapper for special devices.
3296 * Update the times on the nfsnode then do device close.
3300 struct vop_close_args /* {
3303 struct ucred *a_cred;
3304 struct thread *a_td;
3307 register struct vnode *vp = ap->a_vp;
3308 register struct nfsnode *np = VTONFS(vp);
3311 if (np->n_flag & (NACC | NUPD)) {
3313 if (vp->v_usecount == 1 &&
3314 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3316 if (np->n_flag & NACC)
3317 vattr.va_atime = np->n_atim;
3318 if (np->n_flag & NUPD)
3319 vattr.va_mtime = np->n_mtim;
3320 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_td);
3323 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap));
3327 * Read wrapper for fifos.
3331 struct vop_read_args /* {
3335 struct ucred *a_cred;
3338 register struct nfsnode *np = VTONFS(ap->a_vp);
3344 getnanotime(&np->n_atim);
3345 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap));
3349 * Write wrapper for fifos.
3353 struct vop_write_args /* {
3357 struct ucred *a_cred;
3360 register struct nfsnode *np = VTONFS(ap->a_vp);
3366 getnanotime(&np->n_mtim);
3367 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap));
3371 * Close wrapper for fifos.
3373 * Update the times on the nfsnode then do fifo close.
3377 struct vop_close_args /* {
3380 struct ucred *a_cred;
3381 struct thread *a_td;
3384 register struct vnode *vp = ap->a_vp;
3385 register struct nfsnode *np = VTONFS(vp);
3389 if (np->n_flag & (NACC | NUPD)) {
3391 if (np->n_flag & NACC)
3393 if (np->n_flag & NUPD)
3396 if (vp->v_usecount == 1 &&
3397 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3399 if (np->n_flag & NACC)
3400 vattr.va_atime = np->n_atim;
3401 if (np->n_flag & NUPD)
3402 vattr.va_mtime = np->n_mtim;
3403 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_td);
3406 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap));