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 1.61 2006/05/06 02:43:14 dillon Exp $
43 * vnode op calls for Sun NFS version 2 and 3
48 #include <sys/param.h>
49 #include <sys/kernel.h>
50 #include <sys/systm.h>
51 #include <sys/resourcevar.h>
53 #include <sys/mount.h>
55 #include <sys/malloc.h>
57 #include <sys/namei.h>
58 #include <sys/nlookup.h>
59 #include <sys/socket.h>
60 #include <sys/vnode.h>
61 #include <sys/dirent.h>
62 #include <sys/fcntl.h>
63 #include <sys/lockf.h>
65 #include <sys/sysctl.h>
69 #include <vm/vm_extern.h>
70 #include <vm/vm_zone.h>
74 #include <vfs/fifofs/fifo.h>
75 #include <vfs/ufs/dir.h>
85 #include "nfsm_subs.h"
88 #include <netinet/in.h>
89 #include <netinet/in_var.h>
91 #include <sys/thread2.h>
97 static int nfsspec_read (struct vop_read_args *);
98 static int nfsspec_write (struct vop_write_args *);
99 static int nfsfifo_read (struct vop_read_args *);
100 static int nfsfifo_write (struct vop_write_args *);
101 static int nfsspec_close (struct vop_close_args *);
102 static int nfsfifo_close (struct vop_close_args *);
103 #define nfs_poll vop_nopoll
104 static int nfs_setattrrpc (struct vnode *,struct vattr *,struct ucred *,struct thread *);
105 static int nfs_lookup (struct vop_old_lookup_args *);
106 static int nfs_create (struct vop_old_create_args *);
107 static int nfs_mknod (struct vop_old_mknod_args *);
108 static int nfs_open (struct vop_open_args *);
109 static int nfs_close (struct vop_close_args *);
110 static int nfs_access (struct vop_access_args *);
111 static int nfs_getattr (struct vop_getattr_args *);
112 static int nfs_setattr (struct vop_setattr_args *);
113 static int nfs_read (struct vop_read_args *);
114 static int nfs_mmap (struct vop_mmap_args *);
115 static int nfs_fsync (struct vop_fsync_args *);
116 static int nfs_remove (struct vop_old_remove_args *);
117 static int nfs_link (struct vop_old_link_args *);
118 static int nfs_rename (struct vop_old_rename_args *);
119 static int nfs_mkdir (struct vop_old_mkdir_args *);
120 static int nfs_rmdir (struct vop_old_rmdir_args *);
121 static int nfs_symlink (struct vop_old_symlink_args *);
122 static int nfs_readdir (struct vop_readdir_args *);
123 static int nfs_bmap (struct vop_bmap_args *);
124 static int nfs_strategy (struct vop_strategy_args *);
125 static int nfs_lookitup (struct vnode *, const char *, int,
126 struct ucred *, struct thread *, struct nfsnode **);
127 static int nfs_sillyrename (struct vnode *,struct vnode *,struct componentname *);
128 static int nfsspec_access (struct vop_access_args *);
129 static int nfs_readlink (struct vop_readlink_args *);
130 static int nfs_print (struct vop_print_args *);
131 static int nfs_advlock (struct vop_advlock_args *);
133 static int nfs_nresolve (struct vop_nresolve_args *);
135 * Global vfs data structures for nfs
137 struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = {
138 { &vop_default_desc, vop_defaultop },
139 { &vop_access_desc, (vnodeopv_entry_t) nfs_access },
140 { &vop_advlock_desc, (vnodeopv_entry_t) nfs_advlock },
141 { &vop_bmap_desc, (vnodeopv_entry_t) nfs_bmap },
142 { &vop_close_desc, (vnodeopv_entry_t) nfs_close },
143 { &vop_old_create_desc, (vnodeopv_entry_t) nfs_create },
144 { &vop_fsync_desc, (vnodeopv_entry_t) nfs_fsync },
145 { &vop_getattr_desc, (vnodeopv_entry_t) nfs_getattr },
146 { &vop_getpages_desc, (vnodeopv_entry_t) nfs_getpages },
147 { &vop_putpages_desc, (vnodeopv_entry_t) nfs_putpages },
148 { &vop_inactive_desc, (vnodeopv_entry_t) nfs_inactive },
149 { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked },
150 { &vop_old_link_desc, (vnodeopv_entry_t) nfs_link },
151 { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock },
152 { &vop_old_lookup_desc, (vnodeopv_entry_t) nfs_lookup },
153 { &vop_old_mkdir_desc, (vnodeopv_entry_t) nfs_mkdir },
154 { &vop_old_mknod_desc, (vnodeopv_entry_t) nfs_mknod },
155 { &vop_mmap_desc, (vnodeopv_entry_t) nfs_mmap },
156 { &vop_open_desc, (vnodeopv_entry_t) nfs_open },
157 { &vop_poll_desc, (vnodeopv_entry_t) nfs_poll },
158 { &vop_print_desc, (vnodeopv_entry_t) nfs_print },
159 { &vop_read_desc, (vnodeopv_entry_t) nfs_read },
160 { &vop_readdir_desc, (vnodeopv_entry_t) nfs_readdir },
161 { &vop_readlink_desc, (vnodeopv_entry_t) nfs_readlink },
162 { &vop_reclaim_desc, (vnodeopv_entry_t) nfs_reclaim },
163 { &vop_old_remove_desc, (vnodeopv_entry_t) nfs_remove },
164 { &vop_old_rename_desc, (vnodeopv_entry_t) nfs_rename },
165 { &vop_old_rmdir_desc, (vnodeopv_entry_t) nfs_rmdir },
166 { &vop_setattr_desc, (vnodeopv_entry_t) nfs_setattr },
167 { &vop_strategy_desc, (vnodeopv_entry_t) nfs_strategy },
168 { &vop_old_symlink_desc, (vnodeopv_entry_t) nfs_symlink },
169 { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock },
170 { &vop_write_desc, (vnodeopv_entry_t) nfs_write },
172 { &vop_nresolve_desc, (vnodeopv_entry_t) nfs_nresolve },
177 * Special device vnode ops
179 struct vnodeopv_entry_desc nfsv2_specop_entries[] = {
180 { &vop_default_desc, (vnodeopv_entry_t) spec_vnoperate },
181 { &vop_access_desc, (vnodeopv_entry_t) nfsspec_access },
182 { &vop_close_desc, (vnodeopv_entry_t) nfsspec_close },
183 { &vop_fsync_desc, (vnodeopv_entry_t) nfs_fsync },
184 { &vop_getattr_desc, (vnodeopv_entry_t) nfs_getattr },
185 { &vop_inactive_desc, (vnodeopv_entry_t) nfs_inactive },
186 { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked },
187 { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock },
188 { &vop_print_desc, (vnodeopv_entry_t) nfs_print },
189 { &vop_read_desc, (vnodeopv_entry_t) nfsspec_read },
190 { &vop_reclaim_desc, (vnodeopv_entry_t) nfs_reclaim },
191 { &vop_setattr_desc, (vnodeopv_entry_t) nfs_setattr },
192 { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock },
193 { &vop_write_desc, (vnodeopv_entry_t) nfsspec_write },
197 struct vnodeopv_entry_desc nfsv2_fifoop_entries[] = {
198 { &vop_default_desc, (vnodeopv_entry_t) fifo_vnoperate },
199 { &vop_access_desc, (vnodeopv_entry_t) nfsspec_access },
200 { &vop_close_desc, (vnodeopv_entry_t) nfsfifo_close },
201 { &vop_fsync_desc, (vnodeopv_entry_t) nfs_fsync },
202 { &vop_getattr_desc, (vnodeopv_entry_t) nfs_getattr },
203 { &vop_inactive_desc, (vnodeopv_entry_t) nfs_inactive },
204 { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked },
205 { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock },
206 { &vop_print_desc, (vnodeopv_entry_t) nfs_print },
207 { &vop_read_desc, (vnodeopv_entry_t) nfsfifo_read },
208 { &vop_reclaim_desc, (vnodeopv_entry_t) nfs_reclaim },
209 { &vop_setattr_desc, (vnodeopv_entry_t) nfs_setattr },
210 { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock },
211 { &vop_write_desc, (vnodeopv_entry_t) nfsfifo_write },
215 static int nfs_mknodrpc (struct vnode *dvp, struct vnode **vpp,
216 struct componentname *cnp,
218 static int nfs_removerpc (struct vnode *dvp, const char *name,
220 struct ucred *cred, struct thread *td);
221 static int nfs_renamerpc (struct vnode *fdvp, const char *fnameptr,
222 int fnamelen, struct vnode *tdvp,
223 const char *tnameptr, int tnamelen,
224 struct ucred *cred, struct thread *td);
225 static int nfs_renameit (struct vnode *sdvp,
226 struct componentname *scnp,
227 struct sillyrename *sp);
232 extern u_int32_t nfs_true, nfs_false;
233 extern u_int32_t nfs_xdrneg1;
234 extern struct nfsstats nfsstats;
235 extern nfstype nfsv3_type[9];
236 struct thread *nfs_iodwant[NFS_MAXASYNCDAEMON];
237 struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON];
238 int nfs_numasync = 0;
240 SYSCTL_DECL(_vfs_nfs);
242 static int nfsaccess_cache_timeout = NFS_DEFATTRTIMO;
243 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
244 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
246 static int nfsneg_cache_timeout = NFS_MINATTRTIMO;
247 SYSCTL_INT(_vfs_nfs, OID_AUTO, neg_cache_timeout, CTLFLAG_RW,
248 &nfsneg_cache_timeout, 0, "NFS NEGATIVE ACCESS cache timeout");
250 static int nfsv3_commit_on_close = 0;
251 SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
252 &nfsv3_commit_on_close, 0, "write+commit on close, else only write");
254 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
255 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
257 SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
258 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
261 #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \
262 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \
263 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP)
265 nfs3_access_otw(struct vnode *vp, int wmode,
266 struct thread *td, struct ucred *cred)
270 int error = 0, attrflag;
272 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
273 caddr_t bpos, dpos, cp2;
277 struct nfsnode *np = VTONFS(vp);
279 nfsstats.rpccnt[NFSPROC_ACCESS]++;
280 nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED);
282 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
283 *tl = txdr_unsigned(wmode);
284 nfsm_request(vp, NFSPROC_ACCESS, td, cred);
285 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
287 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
288 rmode = fxdr_unsigned(u_int32_t, *tl);
290 np->n_modeuid = cred->cr_uid;
291 np->n_modestamp = mycpu->gd_time_seconds;
299 * nfs access vnode op.
300 * For nfs version 2, just return ok. File accesses may fail later.
301 * For nfs version 3, use the access rpc to check accessibility. If file modes
302 * are changed on the server, accesses might still fail later.
304 * nfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
305 * struct thread *a_td)
308 nfs_access(struct vop_access_args *ap)
310 struct vnode *vp = ap->a_vp;
311 thread_t td = curthread;
313 u_int32_t mode, wmode;
314 int v3 = NFS_ISV3(vp);
315 struct nfsnode *np = VTONFS(vp);
318 * Disallow write attempts on filesystems mounted read-only;
319 * unless the file is a socket, fifo, or a block or character
320 * device resident on the filesystem.
322 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
323 switch (vp->v_type) {
333 * For nfs v3, check to see if we have done this recently, and if
334 * so return our cached result instead of making an ACCESS call.
335 * If not, do an access rpc, otherwise you are stuck emulating
336 * ufs_access() locally using the vattr. This may not be correct,
337 * since the server may apply other access criteria such as
338 * client uid-->server uid mapping that we do not know about.
341 if (ap->a_mode & VREAD)
342 mode = NFSV3ACCESS_READ;
345 if (vp->v_type != VDIR) {
346 if (ap->a_mode & VWRITE)
347 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
348 if (ap->a_mode & VEXEC)
349 mode |= NFSV3ACCESS_EXECUTE;
351 if (ap->a_mode & VWRITE)
352 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
354 if (ap->a_mode & VEXEC)
355 mode |= NFSV3ACCESS_LOOKUP;
357 /* XXX safety belt, only make blanket request if caching */
358 if (nfsaccess_cache_timeout > 0) {
359 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY |
360 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE |
361 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP;
367 * Does our cached result allow us to give a definite yes to
370 if (np->n_modestamp &&
371 (mycpu->gd_time_seconds < (np->n_modestamp + nfsaccess_cache_timeout)) &&
372 (ap->a_cred->cr_uid == np->n_modeuid) &&
373 ((np->n_mode & mode) == mode)) {
374 nfsstats.accesscache_hits++;
377 * Either a no, or a don't know. Go to the wire.
379 nfsstats.accesscache_misses++;
380 error = nfs3_access_otw(vp, wmode, td, ap->a_cred);
382 if ((np->n_mode & mode) != mode) {
388 if ((error = nfsspec_access(ap)) != 0)
392 * Attempt to prevent a mapped root from accessing a file
393 * which it shouldn't. We try to read a byte from the file
394 * if the user is root and the file is not zero length.
395 * After calling nfsspec_access, we should have the correct
398 if (ap->a_cred->cr_uid == 0 && (ap->a_mode & VREAD)
399 && VTONFS(vp)->n_size > 0) {
406 auio.uio_iov = &aiov;
410 auio.uio_segflg = UIO_SYSSPACE;
411 auio.uio_rw = UIO_READ;
414 if (vp->v_type == VREG) {
415 error = nfs_readrpc(vp, &auio);
416 } else if (vp->v_type == VDIR) {
418 bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
420 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
421 error = nfs_readdirrpc(vp, &auio);
423 } else if (vp->v_type == VLNK) {
424 error = nfs_readlinkrpc(vp, &auio);
431 * [re]record creds for reading and/or writing if access
432 * was granted. Assume the NFS server will grant read access
433 * for execute requests.
436 if ((ap->a_mode & (VREAD|VEXEC)) && ap->a_cred != np->n_rucred) {
439 crfree(np->n_rucred);
440 np->n_rucred = ap->a_cred;
442 if ((ap->a_mode & VWRITE) && ap->a_cred != np->n_wucred) {
445 crfree(np->n_wucred);
446 np->n_wucred = ap->a_cred;
454 * Check to see if the type is ok
455 * and that deletion is not in progress.
456 * For paged in text files, you will need to flush the page cache
457 * if consistency is lost.
459 * nfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
463 nfs_open(struct vop_open_args *ap)
465 struct vnode *vp = ap->a_vp;
466 struct nfsnode *np = VTONFS(vp);
470 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
472 printf("open eacces vtyp=%d\n",vp->v_type);
478 * Clear the attribute cache only if opening with write access. It
479 * is unclear if we should do this at all here, but we certainly
480 * should not clear the cache unconditionally simply because a file
483 if (ap->a_mode & FWRITE)
487 * For normal NFS, reconcile changes made locally verses
488 * changes made remotely. Note that VOP_GETATTR only goes
489 * to the wire if the cached attribute has timed out or been
492 * If local modifications have been made clear the attribute
493 * cache to force an attribute and modified time check. If
494 * GETATTR detects that the file has been changed by someone
495 * other then us it will set NRMODIFIED.
497 * If we are opening a directory and local changes have been
498 * made we have to invalidate the cache in order to ensure
499 * that we get the most up-to-date information from the
502 if (np->n_flag & NLMODIFIED) {
504 if (vp->v_type == VDIR) {
505 error = nfs_vinvalbuf(vp, V_SAVE, 1);
511 error = VOP_GETATTR(vp, &vattr);
514 if (np->n_flag & NRMODIFIED) {
515 if (vp->v_type == VDIR)
517 error = nfs_vinvalbuf(vp, V_SAVE, 1);
520 np->n_flag &= ~NRMODIFIED;
523 return (vop_stdopen(ap));
528 * What an NFS client should do upon close after writing is a debatable issue.
529 * Most NFS clients push delayed writes to the server upon close, basically for
531 * 1 - So that any write errors may be reported back to the client process
532 * doing the close system call. By far the two most likely errors are
533 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
534 * 2 - To put a worst case upper bound on cache inconsistency between
535 * multiple clients for the file.
536 * There is also a consistency problem for Version 2 of the protocol w.r.t.
537 * not being able to tell if other clients are writing a file concurrently,
538 * since there is no way of knowing if the changed modify time in the reply
539 * is only due to the write for this client.
540 * (NFS Version 3 provides weak cache consistency data in the reply that
541 * should be sufficient to detect and handle this case.)
543 * The current code does the following:
544 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
545 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
546 * or commit them (this satisfies 1 and 2 except for the
547 * case where the server crashes after this close but
548 * before the commit RPC, which is felt to be "good
549 * enough". Changing the last argument to nfs_flush() to
550 * a 1 would force a commit operation, if it is felt a
551 * commit is necessary now.
552 * for NQNFS - do nothing now, since 2 is dealt with via leases and
553 * 1 should be dealt with via an fsync() system call for
554 * cases where write errors are important.
556 * nfs_close(struct vnodeop_desc *a_desc, struct vnode *a_vp, int a_fflag,
557 * struct ucred *a_cred, struct thread *a_td)
561 nfs_close(struct vop_close_args *ap)
563 struct vnode *vp = ap->a_vp;
564 struct nfsnode *np = VTONFS(vp);
566 thread_t td = curthread;
568 if (vp->v_type == VREG) {
569 if (np->n_flag & NLMODIFIED) {
572 * Under NFSv3 we have dirty buffers to dispose of. We
573 * must flush them to the NFS server. We have the option
574 * of waiting all the way through the commit rpc or just
575 * waiting for the initial write. The default is to only
576 * wait through the initial write so the data is in the
577 * server's cache, which is roughly similar to the state
578 * a standard disk subsystem leaves the file in on close().
580 * We cannot clear the NLMODIFIED bit in np->n_flag due to
581 * potential races with other processes, and certainly
582 * cannot clear it if we don't commit.
584 int cm = nfsv3_commit_on_close ? 1 : 0;
585 error = nfs_flush(vp, MNT_WAIT, td, cm);
586 /* np->n_flag &= ~NLMODIFIED; */
588 error = nfs_vinvalbuf(vp, V_SAVE, 1);
592 if (np->n_flag & NWRITEERR) {
593 np->n_flag &= ~NWRITEERR;
602 * nfs getattr call from vfs.
604 * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred,
605 * struct thread *a_td)
608 nfs_getattr(struct vop_getattr_args *ap)
610 struct vnode *vp = ap->a_vp;
611 struct nfsnode *np = VTONFS(vp);
617 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
618 int v3 = NFS_ISV3(vp);
619 thread_t td = curthread;
622 * Update local times for special files.
624 if (np->n_flag & (NACC | NUPD))
627 * First look in the cache.
629 if (nfs_getattrcache(vp, ap->a_vap) == 0)
632 if (v3 && nfsaccess_cache_timeout > 0) {
633 nfsstats.accesscache_misses++;
634 nfs3_access_otw(vp, NFSV3ACCESS_ALL, td, nfs_vpcred(vp, ND_CHECK));
635 if (nfs_getattrcache(vp, ap->a_vap) == 0)
639 nfsstats.rpccnt[NFSPROC_GETATTR]++;
640 nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3));
642 nfsm_request(vp, NFSPROC_GETATTR, td, nfs_vpcred(vp, ND_CHECK));
644 nfsm_loadattr(vp, ap->a_vap);
654 * nfs_setattr(struct vnodeop_desc *a_desc, struct vnode *a_vp,
655 * struct vattr *a_vap, struct ucred *a_cred)
658 nfs_setattr(struct vop_setattr_args *ap)
660 struct vnode *vp = ap->a_vp;
661 struct nfsnode *np = VTONFS(vp);
662 struct vattr *vap = ap->a_vap;
665 thread_t td = curthread;
672 * Setting of flags is not supported.
674 if (vap->va_flags != VNOVAL)
678 * Disallow write attempts if the filesystem is mounted read-only.
680 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
681 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
682 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
683 (vp->v_mount->mnt_flag & MNT_RDONLY))
685 if (vap->va_size != VNOVAL) {
686 switch (vp->v_type) {
693 if (vap->va_mtime.tv_sec == VNOVAL &&
694 vap->va_atime.tv_sec == VNOVAL &&
695 vap->va_mode == (mode_t)VNOVAL &&
696 vap->va_uid == (uid_t)VNOVAL &&
697 vap->va_gid == (gid_t)VNOVAL)
699 vap->va_size = VNOVAL;
703 * Disallow write attempts if the filesystem is
706 if (vp->v_mount->mnt_flag & MNT_RDONLY)
710 * This is nasty. The RPCs we send to flush pending
711 * data often return attribute information which is
712 * cached via a callback to nfs_loadattrcache(), which
713 * has the effect of changing our notion of the file
714 * size. Due to flushed appends and other operations
715 * the file size can be set to virtually anything,
716 * including values that do not match either the old
717 * or intended file size.
719 * When this condition is detected we must loop to
720 * try the operation again. Hopefully no more
721 * flushing is required on the loop so it works the
722 * second time around. THIS CASE ALMOST ALWAYS
727 error = nfs_meta_setsize(vp, td, vap->va_size);
729 if (np->n_flag & NLMODIFIED) {
730 if (vap->va_size == 0)
731 error = nfs_vinvalbuf(vp, 0, 1);
733 error = nfs_vinvalbuf(vp, V_SAVE, 1);
736 * note: this loop case almost always happens at
737 * least once per truncation.
739 if (error == 0 && np->n_size != vap->va_size)
741 np->n_vattr.va_size = vap->va_size;
744 } else if ((vap->va_mtime.tv_sec != VNOVAL ||
745 vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NLMODIFIED) &&
746 vp->v_type == VREG &&
747 (error = nfs_vinvalbuf(vp, V_SAVE, 1)) == EINTR
751 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
754 * Sanity check if a truncation was issued. This should only occur
755 * if multiple processes are racing on the same file.
757 if (error == 0 && vap->va_size != VNOVAL &&
758 np->n_size != vap->va_size) {
759 printf("NFS ftruncate: server disagrees on the file size: %lld/%lld/%lld\n", tsize, vap->va_size, np->n_size);
762 if (error && vap->va_size != VNOVAL) {
763 np->n_size = np->n_vattr.va_size = tsize;
764 vnode_pager_setsize(vp, np->n_size);
770 * Do an nfs setattr rpc.
773 nfs_setattrrpc(struct vnode *vp, struct vattr *vap,
774 struct ucred *cred, struct thread *td)
776 struct nfsv2_sattr *sp;
777 struct nfsnode *np = VTONFS(vp);
780 caddr_t bpos, dpos, cp2;
782 int error = 0, wccflag = NFSV3_WCCRATTR;
783 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
784 int v3 = NFS_ISV3(vp);
786 nfsstats.rpccnt[NFSPROC_SETATTR]++;
787 nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3));
790 nfsm_v3attrbuild(vap, TRUE);
791 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
794 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
795 if (vap->va_mode == (mode_t)VNOVAL)
796 sp->sa_mode = nfs_xdrneg1;
798 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
799 if (vap->va_uid == (uid_t)VNOVAL)
800 sp->sa_uid = nfs_xdrneg1;
802 sp->sa_uid = txdr_unsigned(vap->va_uid);
803 if (vap->va_gid == (gid_t)VNOVAL)
804 sp->sa_gid = nfs_xdrneg1;
806 sp->sa_gid = txdr_unsigned(vap->va_gid);
807 sp->sa_size = txdr_unsigned(vap->va_size);
808 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
809 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
811 nfsm_request(vp, NFSPROC_SETATTR, td, cred);
814 nfsm_wcc_data(vp, wccflag);
816 nfsm_loadattr(vp, (struct vattr *)0);
823 * NEW API CALL - replaces nfs_lookup(). However, we cannot remove
824 * nfs_lookup() until all remaining new api calls are implemented.
826 * Resolve a namecache entry. This function is passed a locked ncp and
827 * must call cache_setvp() on it as appropriate to resolve the entry.
830 nfs_nresolve(struct vop_nresolve_args *ap)
832 struct thread *td = curthread;
833 struct namecache *ncp;
844 /******NFSM MACROS********/
845 struct mbuf *mb, *mrep, *mreq, *mb2, *md;
846 caddr_t bpos, dpos, cp, cp2;
853 KKASSERT(ncp->nc_parent && ncp->nc_parent->nc_vp);
854 dvp = ncp->nc_parent->nc_vp;
855 if ((error = vget(dvp, LK_SHARED)) != 0)
860 nfsstats.lookupcache_misses++;
861 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
863 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
864 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
866 nfsm_strtom(ncp->nc_name, len, NFS_MAXNAMLEN);
867 nfsm_request(dvp, NFSPROC_LOOKUP, td, ap->a_cred);
870 * Cache negatve lookups to reduce NFS traffic, but use
871 * a fast timeout. Otherwise use a timeout of 1 tick.
872 * XXX we should add a namecache flag for no-caching
873 * to uncache the negative hit as soon as possible, but
874 * we cannot simply destroy the entry because it is used
875 * as a placeholder by the caller.
877 if (error == ENOENT) {
880 if (nfsneg_cache_timeout)
881 nticks = nfsneg_cache_timeout * hz;
884 cache_setvp(ncp, NULL);
885 cache_settimeout(ncp, nticks);
887 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
893 * Success, get the file handle, do various checks, and load
894 * post-operation data from the reply packet. Theoretically
895 * we should never be looking up "." so, theoretically, we
896 * should never get the same file handle as our directory. But
897 * we check anyway. XXX
899 * Note that no timeout is set for the positive cache hit. We
900 * assume, theoretically, that ESTALE returns will be dealt with
901 * properly to handle NFS races and in anycase we cannot depend
902 * on a timeout to deal with NFS open/create/excl issues so instead
903 * of a bad hack here the rest of the NFS client code needs to do
906 nfsm_getfh(fhp, fhsize, v3);
909 if (NFS_CMPFH(np, fhp, fhsize)) {
913 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
922 nfsm_postop_attr(nvp, attrflag, NFS_LATTR_NOSHRINK);
923 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
925 nfsm_loadattr(nvp, NULL);
927 cache_setvp(ncp, nvp);
941 * 'cached' nfs directory lookup
943 * NOTE: cannot be removed until NFS implements all the new n*() API calls.
945 * nfs_lookup(struct vnodeop_desc *a_desc, struct vnode *a_dvp,
946 * struct vnode **a_vpp, struct componentname *a_cnp)
949 nfs_lookup(struct vop_old_lookup_args *ap)
951 struct componentname *cnp = ap->a_cnp;
952 struct vnode *dvp = ap->a_dvp;
953 struct vnode **vpp = ap->a_vpp;
954 int flags = cnp->cn_flags;
959 struct nfsmount *nmp;
960 caddr_t bpos, dpos, cp2;
961 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
965 int lockparent, wantparent, error = 0, attrflag, fhsize;
966 int v3 = NFS_ISV3(dvp);
969 * Read-only mount check and directory check.
972 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) &&
973 (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME))
976 if (dvp->v_type != VDIR)
980 * Look it up in the cache. Note that ENOENT is only returned if we
981 * previously entered a negative hit (see later on). The additional
982 * nfsneg_cache_timeout check causes previously cached results to
983 * be instantly ignored if the negative caching is turned off.
985 lockparent = flags & CNP_LOCKPARENT;
986 wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT);
987 nmp = VFSTONFS(dvp->v_mount);
995 nfsstats.lookupcache_misses++;
996 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
997 len = cnp->cn_namelen;
998 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
999 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
1000 nfsm_fhtom(dvp, v3);
1001 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
1002 nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_td, cnp->cn_cred);
1004 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
1008 nfsm_getfh(fhp, fhsize, v3);
1011 * Handle RENAME case...
1013 if (cnp->cn_nameiop == NAMEI_RENAME && wantparent) {
1014 if (NFS_CMPFH(np, fhp, fhsize)) {
1018 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1025 nfsm_postop_attr(newvp, attrflag, NFS_LATTR_NOSHRINK);
1026 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
1028 nfsm_loadattr(newvp, (struct vattr *)0);
1033 cnp->cn_flags |= CNP_PDIRUNLOCK;
1038 if (flags & CNP_ISDOTDOT) {
1040 cnp->cn_flags |= CNP_PDIRUNLOCK;
1041 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1043 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
1044 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
1045 return (error); /* NOTE: return error from nget */
1049 error = vn_lock(dvp, LK_EXCLUSIVE);
1054 cnp->cn_flags |= CNP_PDIRUNLOCK;
1056 } else if (NFS_CMPFH(np, fhp, fhsize)) {
1060 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1067 cnp->cn_flags |= CNP_PDIRUNLOCK;
1072 nfsm_postop_attr(newvp, attrflag, NFS_LATTR_NOSHRINK);
1073 nfsm_postop_attr(dvp, attrflag, NFS_LATTR_NOSHRINK);
1075 nfsm_loadattr(newvp, (struct vattr *)0);
1077 /* XXX MOVE TO nfs_nremove() */
1078 if ((cnp->cn_flags & CNP_MAKEENTRY) &&
1079 cnp->cn_nameiop != NAMEI_DELETE) {
1080 np->n_ctime = np->n_vattr.va_ctime.tv_sec; /* XXX */
1087 if (newvp != NULLVP) {
1091 if ((cnp->cn_nameiop == NAMEI_CREATE ||
1092 cnp->cn_nameiop == NAMEI_RENAME) &&
1096 cnp->cn_flags |= CNP_PDIRUNLOCK;
1098 if (dvp->v_mount->mnt_flag & MNT_RDONLY)
1101 error = EJUSTRETURN;
1109 * Just call nfs_bioread() to do the work.
1111 * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1112 * struct ucred *a_cred)
1115 nfs_read(struct vop_read_args *ap)
1117 struct vnode *vp = ap->a_vp;
1119 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
1120 switch (vp->v_type) {
1122 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag));
1133 * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
1136 nfs_readlink(struct vop_readlink_args *ap)
1138 struct vnode *vp = ap->a_vp;
1140 if (vp->v_type != VLNK)
1142 return (nfs_bioread(vp, ap->a_uio, 0));
1146 * Do a readlink rpc.
1147 * Called by nfs_doio() from below the buffer cache.
1150 nfs_readlinkrpc(struct vnode *vp, struct uio *uiop)
1155 caddr_t bpos, dpos, cp2;
1156 int error = 0, len, attrflag;
1157 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1158 int v3 = NFS_ISV3(vp);
1160 nfsstats.rpccnt[NFSPROC_READLINK]++;
1161 nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3));
1163 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_td, nfs_vpcred(vp, ND_CHECK));
1165 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
1167 nfsm_strsiz(len, NFS_MAXPATHLEN);
1168 if (len == NFS_MAXPATHLEN) {
1169 struct nfsnode *np = VTONFS(vp);
1170 if (np->n_size && np->n_size < NFS_MAXPATHLEN)
1173 nfsm_mtouio(uiop, len);
1185 nfs_readrpc(struct vnode *vp, struct uio *uiop)
1190 caddr_t bpos, dpos, cp2;
1191 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1192 struct nfsmount *nmp;
1193 int error = 0, len, retlen, tsiz, eof, attrflag;
1194 int v3 = NFS_ISV3(vp);
1199 nmp = VFSTONFS(vp->v_mount);
1200 tsiz = uiop->uio_resid;
1201 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1204 nfsstats.rpccnt[NFSPROC_READ]++;
1205 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
1206 nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3);
1208 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3);
1210 txdr_hyper(uiop->uio_offset, tl);
1211 *(tl + 2) = txdr_unsigned(len);
1213 *tl++ = txdr_unsigned(uiop->uio_offset);
1214 *tl++ = txdr_unsigned(len);
1217 nfsm_request(vp, NFSPROC_READ, uiop->uio_td, nfs_vpcred(vp, ND_READ));
1219 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
1224 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1225 eof = fxdr_unsigned(int, *(tl + 1));
1227 nfsm_loadattr(vp, (struct vattr *)0);
1228 nfsm_strsiz(retlen, nmp->nm_rsize);
1229 nfsm_mtouio(uiop, retlen);
1233 if (eof || retlen == 0) {
1236 } else if (retlen < len) {
1248 nfs_writerpc(struct vnode *vp, struct uio *uiop, int *iomode, int *must_commit)
1252 int32_t t1, t2, backup;
1253 caddr_t bpos, dpos, cp2;
1254 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1255 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1256 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
1257 int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC;
1260 if (uiop->uio_iovcnt != 1)
1261 panic("nfs: writerpc iovcnt > 1");
1264 tsiz = uiop->uio_resid;
1265 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1268 nfsstats.rpccnt[NFSPROC_WRITE]++;
1269 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1270 nfsm_reqhead(vp, NFSPROC_WRITE,
1271 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len));
1274 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
1275 txdr_hyper(uiop->uio_offset, tl);
1277 *tl++ = txdr_unsigned(len);
1278 *tl++ = txdr_unsigned(*iomode);
1279 *tl = txdr_unsigned(len);
1283 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
1284 /* Set both "begin" and "current" to non-garbage. */
1285 x = txdr_unsigned((u_int32_t)uiop->uio_offset);
1286 *tl++ = x; /* "begin offset" */
1287 *tl++ = x; /* "current offset" */
1288 x = txdr_unsigned(len);
1289 *tl++ = x; /* total to this offset */
1290 *tl = x; /* size of this write */
1292 nfsm_uiotom(uiop, len);
1293 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_td, nfs_vpcred(vp, ND_WRITE));
1296 * The write RPC returns a before and after mtime. The
1297 * nfsm_wcc_data() macro checks the before n_mtime
1298 * against the before time and stores the after time
1299 * in the nfsnode's cached vattr and n_mtime field.
1300 * The NRMODIFIED bit will be set if the before
1301 * time did not match the original mtime.
1303 wccflag = NFSV3_WCCCHK;
1304 nfsm_wcc_data(vp, wccflag);
1306 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
1307 + NFSX_V3WRITEVERF);
1308 rlen = fxdr_unsigned(int, *tl++);
1313 } else if (rlen < len) {
1314 backup = len - rlen;
1315 uiop->uio_iov->iov_base -= backup;
1316 uiop->uio_iov->iov_len += backup;
1317 uiop->uio_offset -= backup;
1318 uiop->uio_resid += backup;
1321 commit = fxdr_unsigned(int, *tl++);
1324 * Return the lowest committment level
1325 * obtained by any of the RPCs.
1327 if (committed == NFSV3WRITE_FILESYNC)
1329 else if (committed == NFSV3WRITE_DATASYNC &&
1330 commit == NFSV3WRITE_UNSTABLE)
1332 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){
1333 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1335 nmp->nm_state |= NFSSTA_HASWRITEVERF;
1336 } else if (bcmp((caddr_t)tl,
1337 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1339 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1344 nfsm_loadattr(vp, (struct vattr *)0);
1352 if (vp->v_mount->mnt_flag & MNT_ASYNC)
1353 committed = NFSV3WRITE_FILESYNC;
1354 *iomode = committed;
1356 uiop->uio_resid = tsiz;
1362 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1363 * mode set to specify the file type and the size field for rdev.
1366 nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1369 struct nfsv2_sattr *sp;
1373 struct vnode *newvp = (struct vnode *)0;
1374 struct nfsnode *np = (struct nfsnode *)0;
1378 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
1379 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1381 int v3 = NFS_ISV3(dvp);
1383 if (vap->va_type == VCHR || vap->va_type == VBLK)
1384 rdev = txdr_unsigned(vap->va_rdev);
1385 else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1388 return (EOPNOTSUPP);
1390 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
1393 nfsstats.rpccnt[NFSPROC_MKNOD]++;
1394 nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED +
1395 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1396 nfsm_fhtom(dvp, v3);
1397 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1399 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1400 *tl++ = vtonfsv3_type(vap->va_type);
1401 nfsm_v3attrbuild(vap, FALSE);
1402 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1403 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1404 *tl++ = txdr_unsigned(umajor(vap->va_rdev));
1405 *tl = txdr_unsigned(uminor(vap->va_rdev));
1408 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1409 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1410 sp->sa_uid = nfs_xdrneg1;
1411 sp->sa_gid = nfs_xdrneg1;
1413 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1414 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1416 nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_td, cnp->cn_cred);
1418 nfsm_mtofh(dvp, newvp, v3, gotvp);
1422 newvp = (struct vnode *)0;
1424 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1425 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1431 nfsm_wcc_data(dvp, wccflag);
1440 VTONFS(dvp)->n_flag |= NLMODIFIED;
1442 VTONFS(dvp)->n_attrstamp = 0;
1448 * just call nfs_mknodrpc() to do the work.
1450 * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
1451 * struct componentname *a_cnp, struct vattr *a_vap)
1455 nfs_mknod(struct vop_old_mknod_args *ap)
1457 return nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1460 static u_long create_verf;
1462 * nfs file create call
1464 * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
1465 * struct componentname *a_cnp, struct vattr *a_vap)
1468 nfs_create(struct vop_old_create_args *ap)
1470 struct vnode *dvp = ap->a_dvp;
1471 struct vattr *vap = ap->a_vap;
1472 struct componentname *cnp = ap->a_cnp;
1473 struct nfsv2_sattr *sp;
1477 struct nfsnode *np = (struct nfsnode *)0;
1478 struct vnode *newvp = (struct vnode *)0;
1479 caddr_t bpos, dpos, cp2;
1480 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
1481 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1483 int v3 = NFS_ISV3(dvp);
1486 * Oops, not for me..
1488 if (vap->va_type == VSOCK)
1489 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1491 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
1494 if (vap->va_vaflags & VA_EXCLUSIVE)
1497 nfsstats.rpccnt[NFSPROC_CREATE]++;
1498 nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED +
1499 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1500 nfsm_fhtom(dvp, v3);
1501 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1503 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1504 if (fmode & O_EXCL) {
1505 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
1506 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF);
1508 if (!TAILQ_EMPTY(&in_ifaddrhead))
1509 *tl++ = IA_SIN(TAILQ_FIRST(&in_ifaddrhead))->sin_addr.s_addr;
1512 *tl++ = create_verf;
1513 *tl = ++create_verf;
1515 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
1516 nfsm_v3attrbuild(vap, FALSE);
1519 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1520 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1521 sp->sa_uid = nfs_xdrneg1;
1522 sp->sa_gid = nfs_xdrneg1;
1524 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1525 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1527 nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_td, cnp->cn_cred);
1529 nfsm_mtofh(dvp, newvp, v3, gotvp);
1533 newvp = (struct vnode *)0;
1535 error = nfs_lookitup(dvp, cnp->cn_nameptr,
1536 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
1542 nfsm_wcc_data(dvp, wccflag);
1546 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
1552 } else if (v3 && (fmode & O_EXCL)) {
1554 * We are normally called with only a partially initialized
1555 * VAP. Since the NFSv3 spec says that server may use the
1556 * file attributes to store the verifier, the spec requires
1557 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1558 * in atime, but we can't really assume that all servers will
1559 * so we ensure that our SETATTR sets both atime and mtime.
1561 if (vap->va_mtime.tv_sec == VNOVAL)
1562 vfs_timestamp(&vap->va_mtime);
1563 if (vap->va_atime.tv_sec == VNOVAL)
1564 vap->va_atime = vap->va_mtime;
1565 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td);
1569 * The new np may have enough info for access
1570 * checks, make sure rucred and wucred are
1571 * initialized for read and write rpc's.
1574 if (np->n_rucred == NULL)
1575 np->n_rucred = crhold(cnp->cn_cred);
1576 if (np->n_wucred == NULL)
1577 np->n_wucred = crhold(cnp->cn_cred);
1580 VTONFS(dvp)->n_flag |= NLMODIFIED;
1582 VTONFS(dvp)->n_attrstamp = 0;
1587 * nfs file remove call
1588 * To try and make nfs semantics closer to ufs semantics, a file that has
1589 * other processes using the vnode is renamed instead of removed and then
1590 * removed later on the last close.
1591 * - If v_usecount > 1
1592 * If a rename is not already in the works
1593 * call nfs_sillyrename() to set it up
1597 * nfs_remove(struct vnodeop_desc *a_desc, struct vnode *a_dvp,
1598 * struct vnode *a_vp, struct componentname *a_cnp)
1601 nfs_remove(struct vop_old_remove_args *ap)
1603 struct vnode *vp = ap->a_vp;
1604 struct vnode *dvp = ap->a_dvp;
1605 struct componentname *cnp = ap->a_cnp;
1606 struct nfsnode *np = VTONFS(vp);
1611 if (vp->v_usecount < 1)
1612 panic("nfs_remove: bad v_usecount");
1614 if (vp->v_type == VDIR)
1616 else if (vp->v_usecount == 1 || (np->n_sillyrename &&
1617 VOP_GETATTR(vp, &vattr) == 0 &&
1618 vattr.va_nlink > 1)) {
1620 * throw away biocache buffers, mainly to avoid
1621 * unnecessary delayed writes later.
1623 error = nfs_vinvalbuf(vp, 0, 1);
1626 error = nfs_removerpc(dvp, cnp->cn_nameptr,
1627 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td);
1629 * Kludge City: If the first reply to the remove rpc is lost..
1630 * the reply to the retransmitted request will be ENOENT
1631 * since the file was in fact removed
1632 * Therefore, we cheat and return success.
1634 if (error == ENOENT)
1636 } else if (!np->n_sillyrename) {
1637 error = nfs_sillyrename(dvp, vp, cnp);
1639 np->n_attrstamp = 0;
1644 * nfs file remove rpc called from nfs_inactive
1647 nfs_removeit(struct sillyrename *sp)
1649 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen,
1654 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1657 nfs_removerpc(struct vnode *dvp, const char *name, int namelen,
1658 struct ucred *cred, struct thread *td)
1663 caddr_t bpos, dpos, cp2;
1664 int error = 0, wccflag = NFSV3_WCCRATTR;
1665 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1666 int v3 = NFS_ISV3(dvp);
1668 nfsstats.rpccnt[NFSPROC_REMOVE]++;
1669 nfsm_reqhead(dvp, NFSPROC_REMOVE,
1670 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1671 nfsm_fhtom(dvp, v3);
1672 nfsm_strtom(name, namelen, NFS_MAXNAMLEN);
1673 nfsm_request(dvp, NFSPROC_REMOVE, td, cred);
1675 nfsm_wcc_data(dvp, wccflag);
1678 VTONFS(dvp)->n_flag |= NLMODIFIED;
1680 VTONFS(dvp)->n_attrstamp = 0;
1685 * nfs file rename call
1687 * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
1688 * struct componentname *a_fcnp, struct vnode *a_tdvp,
1689 * struct vnode *a_tvp, struct componentname *a_tcnp)
1692 nfs_rename(struct vop_old_rename_args *ap)
1694 struct vnode *fvp = ap->a_fvp;
1695 struct vnode *tvp = ap->a_tvp;
1696 struct vnode *fdvp = ap->a_fdvp;
1697 struct vnode *tdvp = ap->a_tdvp;
1698 struct componentname *tcnp = ap->a_tcnp;
1699 struct componentname *fcnp = ap->a_fcnp;
1702 /* Check for cross-device rename */
1703 if ((fvp->v_mount != tdvp->v_mount) ||
1704 (tvp && (fvp->v_mount != tvp->v_mount))) {
1710 * We have to flush B_DELWRI data prior to renaming
1711 * the file. If we don't, the delayed-write buffers
1712 * can be flushed out later after the file has gone stale
1713 * under NFSV3. NFSV2 does not have this problem because
1714 * ( as far as I can tell ) it flushes dirty buffers more
1718 VOP_FSYNC(fvp, MNT_WAIT);
1720 VOP_FSYNC(tvp, MNT_WAIT);
1723 * If the tvp exists and is in use, sillyrename it before doing the
1724 * rename of the new file over it.
1726 * XXX Can't sillyrename a directory.
1728 * We do not attempt to do any namecache purges in this old API
1729 * routine. The new API compat functions have access to the actual
1730 * namecache structures and will do it for us.
1732 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename &&
1733 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1740 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1741 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1754 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1756 if (error == ENOENT)
1762 * nfs file rename rpc called from nfs_remove() above
1765 nfs_renameit(struct vnode *sdvp, struct componentname *scnp,
1766 struct sillyrename *sp)
1768 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
1769 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td));
1773 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1776 nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen,
1777 struct vnode *tdvp, const char *tnameptr, int tnamelen,
1778 struct ucred *cred, struct thread *td)
1783 caddr_t bpos, dpos, cp2;
1784 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
1785 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1786 int v3 = NFS_ISV3(fdvp);
1788 nfsstats.rpccnt[NFSPROC_RENAME]++;
1789 nfsm_reqhead(fdvp, NFSPROC_RENAME,
1790 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) +
1791 nfsm_rndup(tnamelen));
1792 nfsm_fhtom(fdvp, v3);
1793 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN);
1794 nfsm_fhtom(tdvp, v3);
1795 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN);
1796 nfsm_request(fdvp, NFSPROC_RENAME, td, cred);
1798 nfsm_wcc_data(fdvp, fwccflag);
1799 nfsm_wcc_data(tdvp, twccflag);
1803 VTONFS(fdvp)->n_flag |= NLMODIFIED;
1804 VTONFS(tdvp)->n_flag |= NLMODIFIED;
1806 VTONFS(fdvp)->n_attrstamp = 0;
1808 VTONFS(tdvp)->n_attrstamp = 0;
1813 * nfs hard link create call
1815 * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp,
1816 * struct componentname *a_cnp)
1819 nfs_link(struct vop_old_link_args *ap)
1821 struct vnode *vp = ap->a_vp;
1822 struct vnode *tdvp = ap->a_tdvp;
1823 struct componentname *cnp = ap->a_cnp;
1827 caddr_t bpos, dpos, cp2;
1828 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
1829 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1832 if (vp->v_mount != tdvp->v_mount) {
1837 * Push all writes to the server, so that the attribute cache
1838 * doesn't get "out of sync" with the server.
1839 * XXX There should be a better way!
1841 VOP_FSYNC(vp, MNT_WAIT);
1844 nfsstats.rpccnt[NFSPROC_LINK]++;
1845 nfsm_reqhead(vp, NFSPROC_LINK,
1846 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
1848 nfsm_fhtom(tdvp, v3);
1849 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1850 nfsm_request(vp, NFSPROC_LINK, cnp->cn_td, cnp->cn_cred);
1852 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
1853 nfsm_wcc_data(tdvp, wccflag);
1857 VTONFS(tdvp)->n_flag |= NLMODIFIED;
1859 VTONFS(vp)->n_attrstamp = 0;
1861 VTONFS(tdvp)->n_attrstamp = 0;
1863 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1865 if (error == EEXIST)
1871 * nfs symbolic link create call
1873 * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1874 * struct componentname *a_cnp, struct vattr *a_vap,
1878 nfs_symlink(struct vop_old_symlink_args *ap)
1880 struct vnode *dvp = ap->a_dvp;
1881 struct vattr *vap = ap->a_vap;
1882 struct componentname *cnp = ap->a_cnp;
1883 struct nfsv2_sattr *sp;
1887 caddr_t bpos, dpos, cp2;
1888 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
1889 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1890 struct vnode *newvp = (struct vnode *)0;
1891 int v3 = NFS_ISV3(dvp);
1893 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1894 slen = strlen(ap->a_target);
1895 nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED +
1896 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3));
1897 nfsm_fhtom(dvp, v3);
1898 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1900 nfsm_v3attrbuild(vap, FALSE);
1902 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
1904 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1905 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
1906 sp->sa_uid = nfs_xdrneg1;
1907 sp->sa_gid = nfs_xdrneg1;
1908 sp->sa_size = nfs_xdrneg1;
1909 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1910 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1914 * Issue the NFS request and get the rpc response.
1916 * Only NFSv3 responses returning an error of 0 actually return
1917 * a file handle that can be converted into newvp without having
1918 * to do an extra lookup rpc.
1920 nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_td, cnp->cn_cred);
1923 nfsm_mtofh(dvp, newvp, v3, gotvp);
1924 nfsm_wcc_data(dvp, wccflag);
1928 * out code jumps -> here, mrep is also freed.
1935 * If we get an EEXIST error, silently convert it to no-error
1936 * in case of an NFS retry.
1938 if (error == EEXIST)
1942 * If we do not have (or no longer have) an error, and we could
1943 * not extract the newvp from the response due to the request being
1944 * NFSv2 or the error being EEXIST. We have to do a lookup in order
1945 * to obtain a newvp to return.
1947 if (error == 0 && newvp == NULL) {
1948 struct nfsnode *np = NULL;
1950 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
1951 cnp->cn_cred, cnp->cn_td, &np);
1961 VTONFS(dvp)->n_flag |= NLMODIFIED;
1963 VTONFS(dvp)->n_attrstamp = 0;
1970 * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
1971 * struct componentname *a_cnp, struct vattr *a_vap)
1974 nfs_mkdir(struct vop_old_mkdir_args *ap)
1976 struct vnode *dvp = ap->a_dvp;
1977 struct vattr *vap = ap->a_vap;
1978 struct componentname *cnp = ap->a_cnp;
1979 struct nfsv2_sattr *sp;
1984 struct nfsnode *np = (struct nfsnode *)0;
1985 struct vnode *newvp = (struct vnode *)0;
1986 caddr_t bpos, dpos, cp2;
1987 int error = 0, wccflag = NFSV3_WCCRATTR;
1989 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1991 int v3 = NFS_ISV3(dvp);
1993 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
1996 len = cnp->cn_namelen;
1997 nfsstats.rpccnt[NFSPROC_MKDIR]++;
1998 nfsm_reqhead(dvp, NFSPROC_MKDIR,
1999 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3));
2000 nfsm_fhtom(dvp, v3);
2001 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
2003 nfsm_v3attrbuild(vap, FALSE);
2005 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
2006 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
2007 sp->sa_uid = nfs_xdrneg1;
2008 sp->sa_gid = nfs_xdrneg1;
2009 sp->sa_size = nfs_xdrneg1;
2010 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
2011 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
2013 nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_td, cnp->cn_cred);
2015 nfsm_mtofh(dvp, newvp, v3, gotvp);
2017 nfsm_wcc_data(dvp, wccflag);
2020 VTONFS(dvp)->n_flag |= NLMODIFIED;
2022 VTONFS(dvp)->n_attrstamp = 0;
2024 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
2025 * if we can succeed in looking up the directory.
2027 if (error == EEXIST || (!error && !gotvp)) {
2030 newvp = (struct vnode *)0;
2032 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
2036 if (newvp->v_type != VDIR)
2049 * nfs remove directory call
2051 * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
2052 * struct componentname *a_cnp)
2055 nfs_rmdir(struct vop_old_rmdir_args *ap)
2057 struct vnode *vp = ap->a_vp;
2058 struct vnode *dvp = ap->a_dvp;
2059 struct componentname *cnp = ap->a_cnp;
2063 caddr_t bpos, dpos, cp2;
2064 int error = 0, wccflag = NFSV3_WCCRATTR;
2065 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2066 int v3 = NFS_ISV3(dvp);
2070 nfsstats.rpccnt[NFSPROC_RMDIR]++;
2071 nfsm_reqhead(dvp, NFSPROC_RMDIR,
2072 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
2073 nfsm_fhtom(dvp, v3);
2074 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
2075 nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_td, cnp->cn_cred);
2077 nfsm_wcc_data(dvp, wccflag);
2080 VTONFS(dvp)->n_flag |= NLMODIFIED;
2082 VTONFS(dvp)->n_attrstamp = 0;
2084 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2086 if (error == ENOENT)
2094 * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
2097 nfs_readdir(struct vop_readdir_args *ap)
2099 struct vnode *vp = ap->a_vp;
2100 struct nfsnode *np = VTONFS(vp);
2101 struct uio *uio = ap->a_uio;
2105 if (vp->v_type != VDIR)
2109 * If we have a valid EOF offset cache we must call VOP_GETATTR()
2110 * and then check that is still valid, or if this is an NQNFS mount
2111 * we call NQNFS_CKCACHEABLE() instead of VOP_GETATTR(). Note that
2112 * VOP_GETATTR() does not necessarily go to the wire.
2114 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2115 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0) {
2116 if (VOP_GETATTR(vp, &vattr) == 0 &&
2117 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0
2119 nfsstats.direofcache_hits++;
2125 * Call nfs_bioread() to do the real work. nfs_bioread() does its
2126 * own cache coherency checks so we do not have to.
2128 tresid = uio->uio_resid;
2129 error = nfs_bioread(vp, uio, 0);
2131 if (!error && uio->uio_resid == tresid)
2132 nfsstats.direofcache_misses++;
2137 * Readdir rpc call. nfs_bioread->nfs_doio->nfs_readdirrpc.
2139 * Note that for directories, nfs_bioread maintains the underlying nfs-centric
2140 * offset/block and converts the nfs formatted directory entries for userland
2141 * consumption as well as deals with offsets into the middle of blocks.
2142 * nfs_doio only deals with logical blocks. In particular, uio_offset will
2143 * be block-bounded. It must convert to cookies for the actual RPC.
2146 nfs_readdirrpc(struct vnode *vp, struct uio *uiop)
2149 struct nfs_dirent *dp = NULL;
2154 caddr_t bpos, dpos, cp2;
2155 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2157 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2158 struct nfsnode *dnp = VTONFS(vp);
2160 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2162 int v3 = NFS_ISV3(vp);
2165 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2166 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2167 panic("nfs readdirrpc bad uio");
2171 * If there is no cookie, assume directory was stale.
2173 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2177 return (NFSERR_BAD_COOKIE);
2179 * Loop around doing readdir rpc's of size nm_readdirsize
2180 * truncated to a multiple of DIRBLKSIZ.
2181 * The stopping criteria is EOF or buffer full.
2183 while (more_dirs && bigenough) {
2184 nfsstats.rpccnt[NFSPROC_READDIR]++;
2185 nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) +
2189 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
2190 *tl++ = cookie.nfsuquad[0];
2191 *tl++ = cookie.nfsuquad[1];
2192 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2193 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2195 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
2196 *tl++ = cookie.nfsuquad[0];
2198 *tl = txdr_unsigned(nmp->nm_readdirsize);
2199 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_td, nfs_vpcred(vp, ND_READ));
2201 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
2203 nfsm_dissect(tl, u_int32_t *,
2205 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2206 dnp->n_cookieverf.nfsuquad[1] = *tl;
2212 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2213 more_dirs = fxdr_unsigned(int, *tl);
2215 /* loop thru the dir entries, converting them to std form */
2216 while (more_dirs && bigenough) {
2218 nfsm_dissect(tl, u_int32_t *,
2220 fileno = fxdr_hyper(tl);
2221 len = fxdr_unsigned(int, *(tl + 2));
2223 nfsm_dissect(tl, u_int32_t *,
2225 fileno = fxdr_unsigned(u_quad_t, *tl++);
2226 len = fxdr_unsigned(int, *tl);
2228 if (len <= 0 || len > NFS_MAXNAMLEN) {
2235 * len is the number of bytes in the path element
2236 * name, not including the \0 termination.
2238 * tlen is the number of bytes w have to reserve for
2239 * the path element name.
2241 tlen = nfsm_rndup(len);
2243 tlen += 4; /* To ensure null termination */
2246 * If the entry would cross a DIRBLKSIZ boundary,
2247 * extend the previous nfs_dirent to cover the
2250 left = DIRBLKSIZ - blksiz;
2251 if ((tlen + sizeof(struct nfs_dirent)) > left) {
2252 dp->nfs_reclen += left;
2253 uiop->uio_iov->iov_base += left;
2254 uiop->uio_iov->iov_len -= left;
2255 uiop->uio_offset += left;
2256 uiop->uio_resid -= left;
2259 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid)
2262 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base;
2263 dp->nfs_ino = fileno;
2264 dp->nfs_namlen = len;
2265 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent);
2266 dp->nfs_type = DT_UNKNOWN;
2267 blksiz += dp->nfs_reclen;
2268 if (blksiz == DIRBLKSIZ)
2270 uiop->uio_offset += sizeof(struct nfs_dirent);
2271 uiop->uio_resid -= sizeof(struct nfs_dirent);
2272 uiop->uio_iov->iov_base += sizeof(struct nfs_dirent);
2273 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent);
2274 nfsm_mtouio(uiop, len);
2277 * The uiop has advanced by nfs_dirent + len
2278 * but really needs to advance by
2281 cp = uiop->uio_iov->iov_base;
2283 *cp = '\0'; /* null terminate */
2284 uiop->uio_iov->iov_base += tlen;
2285 uiop->uio_iov->iov_len -= tlen;
2286 uiop->uio_offset += tlen;
2287 uiop->uio_resid -= tlen;
2290 * NFS strings must be rounded up (nfsm_myouio
2291 * handled that in the bigenough case).
2293 nfsm_adv(nfsm_rndup(len));
2296 nfsm_dissect(tl, u_int32_t *,
2299 nfsm_dissect(tl, u_int32_t *,
2304 * If we were able to accomodate the last entry,
2305 * get the cookie for the next one. Otherwise
2306 * hold-over the cookie for the one we were not
2307 * able to accomodate.
2310 cookie.nfsuquad[0] = *tl++;
2312 cookie.nfsuquad[1] = *tl++;
2318 more_dirs = fxdr_unsigned(int, *tl);
2321 * If at end of rpc data, get the eof boolean
2324 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2325 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2330 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2331 * by increasing d_reclen for the last record.
2334 left = DIRBLKSIZ - blksiz;
2335 dp->nfs_reclen += left;
2336 uiop->uio_iov->iov_base += left;
2337 uiop->uio_iov->iov_len -= left;
2338 uiop->uio_offset += left;
2339 uiop->uio_resid -= left;
2344 * We hit the end of the directory, update direofoffset.
2346 dnp->n_direofoffset = uiop->uio_offset;
2349 * There is more to go, insert the link cookie so the
2350 * next block can be read.
2352 if (uiop->uio_resid > 0)
2353 printf("EEK! readdirrpc resid > 0\n");
2354 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2362 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2365 nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop)
2368 struct nfs_dirent *dp;
2372 struct vnode *newvp;
2374 caddr_t bpos, dpos, cp2, dpossav1, dpossav2;
2375 struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2;
2377 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2378 struct nfsnode *dnp = VTONFS(vp), *np;
2381 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2382 int attrflag, fhsize;
2383 struct namecache *ncp;
2384 struct namecache *dncp;
2385 struct nlcomponent nlc;
2391 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2392 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2393 panic("nfs readdirplusrpc bad uio");
2396 * Obtain the namecache record for the directory so we have something
2397 * to use as a basis for creating the entries. This function will
2398 * return a held (but not locked) ncp. The ncp may be disconnected
2399 * from the tree and cannot be used for upward traversals, and the
2400 * ncp may be unnamed. Note that other unrelated operations may
2401 * cause the ncp to be named at any time.
2403 dncp = cache_fromdvp(vp, NULL, 0);
2404 bzero(&nlc, sizeof(nlc));
2408 * If there is no cookie, assume directory was stale.
2410 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2414 return (NFSERR_BAD_COOKIE);
2416 * Loop around doing readdir rpc's of size nm_readdirsize
2417 * truncated to a multiple of DIRBLKSIZ.
2418 * The stopping criteria is EOF or buffer full.
2420 while (more_dirs && bigenough) {
2421 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
2422 nfsm_reqhead(vp, NFSPROC_READDIRPLUS,
2423 NFSX_FH(1) + 6 * NFSX_UNSIGNED);
2425 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
2426 *tl++ = cookie.nfsuquad[0];
2427 *tl++ = cookie.nfsuquad[1];
2428 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2429 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2430 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2431 *tl = txdr_unsigned(nmp->nm_rsize);
2432 nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_td, nfs_vpcred(vp, ND_READ));
2433 nfsm_postop_attr(vp, attrflag, NFS_LATTR_NOSHRINK);
2438 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2439 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2440 dnp->n_cookieverf.nfsuquad[1] = *tl++;
2441 more_dirs = fxdr_unsigned(int, *tl);
2443 /* loop thru the dir entries, doctoring them to 4bsd form */
2444 while (more_dirs && bigenough) {
2445 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2446 fileno = fxdr_hyper(tl);
2447 len = fxdr_unsigned(int, *(tl + 2));
2448 if (len <= 0 || len > NFS_MAXNAMLEN) {
2453 tlen = nfsm_rndup(len);
2455 tlen += 4; /* To ensure null termination*/
2456 left = DIRBLKSIZ - blksiz;
2457 if ((tlen + sizeof(struct nfs_dirent)) > left) {
2458 dp->nfs_reclen += left;
2459 uiop->uio_iov->iov_base += left;
2460 uiop->uio_iov->iov_len -= left;
2461 uiop->uio_offset += left;
2462 uiop->uio_resid -= left;
2465 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid)
2468 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base;
2469 dp->nfs_ino = fileno;
2470 dp->nfs_namlen = len;
2471 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent);
2472 dp->nfs_type = DT_UNKNOWN;
2473 blksiz += dp->nfs_reclen;
2474 if (blksiz == DIRBLKSIZ)
2476 uiop->uio_offset += sizeof(struct nfs_dirent);
2477 uiop->uio_resid -= sizeof(struct nfs_dirent);
2478 uiop->uio_iov->iov_base += sizeof(struct nfs_dirent);
2479 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent);
2480 nlc.nlc_nameptr = uiop->uio_iov->iov_base;
2481 nlc.nlc_namelen = len;
2482 nfsm_mtouio(uiop, len);
2483 cp = uiop->uio_iov->iov_base;
2486 uiop->uio_iov->iov_base += tlen;
2487 uiop->uio_iov->iov_len -= tlen;
2488 uiop->uio_offset += tlen;
2489 uiop->uio_resid -= tlen;
2491 nfsm_adv(nfsm_rndup(len));
2492 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2494 cookie.nfsuquad[0] = *tl++;
2495 cookie.nfsuquad[1] = *tl++;
2500 * Since the attributes are before the file handle
2501 * (sigh), we must skip over the attributes and then
2502 * come back and get them.
2504 attrflag = fxdr_unsigned(int, *tl);
2508 nfsm_adv(NFSX_V3FATTR);
2509 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2510 doit = fxdr_unsigned(int, *tl);
2512 nfsm_getfh(fhp, fhsize, 1);
2513 if (NFS_CMPFH(dnp, fhp, fhsize)) {
2518 error = nfs_nget(vp->v_mount, fhp,
2526 if (doit && bigenough) {
2531 nfsm_loadattr(newvp, (struct vattr *)0);
2535 IFTODT(VTTOIF(np->n_vattr.va_type));
2537 printf("NFS/READDIRPLUS, ENTER %*.*s\n",
2538 nlc.nlc_namelen, nlc.nlc_namelen,
2540 ncp = cache_nlookup(dncp, &nlc);
2541 cache_setunresolved(ncp);
2542 cache_setvp(ncp, newvp);
2545 printf("NFS/READDIRPLUS, UNABLE TO ENTER"
2547 nlc.nlc_namelen, nlc.nlc_namelen,
2552 /* Just skip over the file handle */
2553 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2554 i = fxdr_unsigned(int, *tl);
2555 nfsm_adv(nfsm_rndup(i));
2557 if (newvp != NULLVP) {
2564 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2565 more_dirs = fxdr_unsigned(int, *tl);
2568 * If at end of rpc data, get the eof boolean
2571 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
2572 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2577 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2578 * by increasing d_reclen for the last record.
2581 left = DIRBLKSIZ - blksiz;
2582 dp->nfs_reclen += left;
2583 uiop->uio_iov->iov_base += left;
2584 uiop->uio_iov->iov_len -= left;
2585 uiop->uio_offset += left;
2586 uiop->uio_resid -= left;
2590 * We are now either at the end of the directory or have filled the
2594 dnp->n_direofoffset = uiop->uio_offset;
2596 if (uiop->uio_resid > 0)
2597 printf("EEK! readdirplusrpc resid > 0\n");
2598 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2602 if (newvp != NULLVP) {
2615 * Silly rename. To make the NFS filesystem that is stateless look a little
2616 * more like the "ufs" a remove of an active vnode is translated to a rename
2617 * to a funny looking filename that is removed by nfs_inactive on the
2618 * nfsnode. There is the potential for another process on a different client
2619 * to create the same funny name between the nfs_lookitup() fails and the
2620 * nfs_rename() completes, but...
2623 nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
2625 struct sillyrename *sp;
2630 * We previously purged dvp instead of vp. I don't know why, it
2631 * completely destroys performance. We can't do it anyway with the
2632 * new VFS API since we would be breaking the namecache topology.
2634 cache_purge(vp); /* XXX */
2637 if (vp->v_type == VDIR)
2638 panic("nfs: sillyrename dir");
2640 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
2641 M_NFSREQ, M_WAITOK);
2642 sp->s_cred = crdup(cnp->cn_cred);
2646 /* Fudge together a funny name */
2647 sp->s_namlen = sprintf(sp->s_name, ".nfsA%08x4.4", (int)cnp->cn_td);
2649 /* Try lookitups until we get one that isn't there */
2650 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2651 cnp->cn_td, (struct nfsnode **)0) == 0) {
2653 if (sp->s_name[4] > 'z') {
2658 error = nfs_renameit(dvp, cnp, sp);
2661 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2663 np->n_sillyrename = sp;
2668 free((caddr_t)sp, M_NFSREQ);
2673 * Look up a file name and optionally either update the file handle or
2674 * allocate an nfsnode, depending on the value of npp.
2675 * npp == NULL --> just do the lookup
2676 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2678 * *npp != NULL --> update the file handle in the vnode
2681 nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred,
2682 struct thread *td, struct nfsnode **npp)
2687 struct vnode *newvp = (struct vnode *)0;
2688 struct nfsnode *np, *dnp = VTONFS(dvp);
2689 caddr_t bpos, dpos, cp2;
2690 int error = 0, fhlen, attrflag;
2691 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2693 int v3 = NFS_ISV3(dvp);
2695 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
2696 nfsm_reqhead(dvp, NFSPROC_LOOKUP,
2697 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2698 nfsm_fhtom(dvp, v3);
2699 nfsm_strtom(name, len, NFS_MAXNAMLEN);
2700 nfsm_request(dvp, NFSPROC_LOOKUP, td, cred);
2701 if (npp && !error) {
2702 nfsm_getfh(nfhp, fhlen, v3);
2705 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2706 free((caddr_t)np->n_fhp, M_NFSBIGFH);
2707 np->n_fhp = &np->n_fh;
2708 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2709 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK);
2710 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2711 np->n_fhsize = fhlen;
2713 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
2717 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
2725 nfsm_postop_attr(newvp, attrflag, NFS_LATTR_NOSHRINK);
2726 if (!attrflag && *npp == NULL) {
2735 nfsm_loadattr(newvp, (struct vattr *)0);
2739 if (npp && *npp == NULL) {
2754 * Nfs Version 3 commit rpc
2757 nfs_commit(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td)
2762 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2763 caddr_t bpos, dpos, cp2;
2764 int error = 0, wccflag = NFSV3_WCCRATTR;
2765 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2767 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
2769 nfsstats.rpccnt[NFSPROC_COMMIT]++;
2770 nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1));
2772 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
2773 txdr_hyper(offset, tl);
2775 *tl = txdr_unsigned(cnt);
2776 nfsm_request(vp, NFSPROC_COMMIT, td, nfs_vpcred(vp, ND_WRITE));
2777 nfsm_wcc_data(vp, wccflag);
2779 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF);
2780 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
2781 NFSX_V3WRITEVERF)) {
2782 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
2784 error = NFSERR_STALEWRITEVERF;
2794 * - make nfs_bmap() essentially a no-op that does no translation
2795 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
2796 * (Maybe I could use the process's page mapping, but I was concerned that
2797 * Kernel Write might not be enabled and also figured copyout() would do
2798 * a lot more work than bcopy() and also it currently happens in the
2799 * context of the swapper process (2).
2801 * nfs_bmap(struct vnode *a_vp, off_t a_loffset, struct vnode **a_vpp,
2802 * off_t *a_doffsetp, int *a_runp, int *a_runb)
2805 nfs_bmap(struct vop_bmap_args *ap)
2807 struct vnode *vp = ap->a_vp;
2809 if (ap->a_vpp != NULL)
2811 if (ap->a_doffsetp != NULL)
2812 *ap->a_doffsetp = ap->a_loffset;
2813 if (ap->a_runp != NULL)
2815 if (ap->a_runb != NULL)
2823 * For async requests when nfsiod(s) are running, queue the request by
2824 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the
2828 nfs_strategy(struct vop_strategy_args *ap)
2830 struct bio *bio = ap->a_bio;
2832 struct buf *bp = bio->bio_buf;
2836 KASSERT(bp->b_cmd != BUF_CMD_DONE,
2837 ("nfs_strategy: buffer %p unexpectedly marked done", bp));
2838 KASSERT(BUF_REFCNT(bp) > 0,
2839 ("nfs_strategy: buffer %p not locked", bp));
2841 if (bp->b_flags & B_ASYNC)
2844 td = curthread; /* XXX */
2847 * We probably don't need to push an nbio any more since no
2848 * block conversion is required due to the use of 64 bit byte
2849 * offsets, but do it anyway.
2851 nbio = push_bio(bio);
2852 nbio->bio_offset = bio->bio_offset;
2855 * If the op is asynchronous and an i/o daemon is waiting
2856 * queue the request, wake it up and wait for completion
2857 * otherwise just do it ourselves.
2859 if ((bp->b_flags & B_ASYNC) == 0 || nfs_asyncio(ap->a_vp, nbio, td))
2860 error = nfs_doio(ap->a_vp, nbio, td);
2867 * NB Currently unsupported.
2869 * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred,
2870 * struct thread *a_td)
2874 nfs_mmap(struct vop_mmap_args *ap)
2880 * fsync vnode op. Just call nfs_flush() with commit == 1.
2882 * nfs_fsync(struct vnodeop_desc *a_desc, struct vnode *a_vp,
2883 * struct ucred * a_cred, int a_waitfor, struct thread *a_td)
2887 nfs_fsync(struct vop_fsync_args *ap)
2889 return (nfs_flush(ap->a_vp, ap->a_waitfor, curthread, 1));
2893 * Flush all the blocks associated with a vnode. Dirty NFS buffers may be
2894 * in one of two states: If B_NEEDCOMMIT is clear then the buffer contains
2895 * new NFS data which needs to be written to the server. If B_NEEDCOMMIT is
2896 * set the buffer contains data that has already been written to the server
2897 * and which now needs a commit RPC.
2899 * If commit is 0 we only take one pass and only flush buffers containing new
2902 * If commit is 1 we take two passes, issuing a commit RPC in the second
2905 * If waitfor is MNT_WAIT and commit is 1, we loop as many times as required
2906 * to completely flush all pending data.
2908 * Note that the RB_SCAN code properly handles the case where the
2909 * callback might block and directly or indirectly (another thread) cause
2910 * the RB tree to change.
2913 #ifndef NFS_COMMITBVECSIZ
2914 #define NFS_COMMITBVECSIZ 16
2917 struct nfs_flush_info {
2918 enum { NFI_FLUSHNEW, NFI_COMMIT } mode;
2925 struct buf *bvary[NFS_COMMITBVECSIZ];
2931 static int nfs_flush_bp(struct buf *bp, void *data);
2932 static int nfs_flush_docommit(struct nfs_flush_info *info, int error);
2935 nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit)
2937 struct nfsnode *np = VTONFS(vp);
2938 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2939 struct nfs_flush_info info;
2942 bzero(&info, sizeof(info));
2945 info.waitfor = waitfor;
2946 info.slpflag = (nmp->nm_flag & NFSMNT_INT) ? PCATCH : 0;
2953 info.mode = NFI_FLUSHNEW;
2954 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
2955 nfs_flush_bp, &info);
2958 * Take a second pass if committing and no error occured.
2959 * Clean up any left over collection (whether an error
2962 if (commit && error == 0) {
2963 info.mode = NFI_COMMIT;
2964 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
2965 nfs_flush_bp, &info);
2967 error = nfs_flush_docommit(&info, error);
2971 * Wait for pending I/O to complete before checking whether
2972 * any further dirty buffers exist.
2974 while (waitfor == MNT_WAIT && vp->v_track_write.bk_active) {
2975 vp->v_track_write.bk_waitflag = 1;
2976 error = tsleep(&vp->v_track_write,
2977 info.slpflag, "nfsfsync", info.slptimeo);
2980 * We have to be able to break out if this
2981 * is an 'intr' mount.
2983 if (nfs_sigintr(nmp, (struct nfsreq *)0, td)) {
2989 * Since we do not process pending signals,
2990 * once we get a PCATCH our tsleep() will no
2991 * longer sleep, switch to a fixed timeout
2994 if (info.slpflag == PCATCH) {
2996 info.slptimeo = 2 * hz;
3003 * Loop if we are flushing synchronous as well as committing,
3004 * and dirty buffers are still present. Otherwise we might livelock.
3006 } while (waitfor == MNT_WAIT && commit &&
3007 error == 0 && !RB_EMPTY(&vp->v_rbdirty_tree));
3010 * The callbacks have to return a negative error to terminate the
3017 * Deal with any error collection
3019 if (np->n_flag & NWRITEERR) {
3020 error = np->n_error;
3021 np->n_flag &= ~NWRITEERR;
3029 nfs_flush_bp(struct buf *bp, void *data)
3031 struct nfs_flush_info *info = data;
3036 switch(info->mode) {
3039 if (info->loops && info->waitfor == MNT_WAIT) {
3040 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT);
3042 int lkflags = LK_EXCLUSIVE | LK_SLEEPFAIL;
3043 if (info->slpflag & PCATCH)
3044 lkflags |= LK_PCATCH;
3045 error = BUF_TIMELOCK(bp, lkflags, "nfsfsync",
3049 error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT);
3052 KKASSERT(bp->b_vp == info->vp);
3054 if ((bp->b_flags & B_DELWRI) == 0)
3055 panic("nfs_fsync: not dirty");
3056 if (bp->b_flags & B_NEEDCOMMIT) {
3063 bp->b_flags |= B_ASYNC;
3073 * Only process buffers in need of a commit which we can
3074 * immediately lock. This may prevent a buffer from being
3075 * committed, but the normal flush loop will block on the
3076 * same buffer so we shouldn't get into an endless loop.
3079 if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
3080 (B_DELWRI | B_NEEDCOMMIT) ||
3081 BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT) != 0) {
3086 KKASSERT(bp->b_vp == info->vp);
3090 * NOTE: storing the bp in the bvary[] basically sets
3091 * it up for a commit operation.
3093 * We must call vfs_busy_pages() now so the commit operation
3094 * is interlocked with user modifications to memory mapped
3097 * Note: to avoid loopback deadlocks, we do not
3098 * assign b_runningbufspace.
3100 bp->b_cmd = BUF_CMD_WRITE;
3101 vfs_busy_pages(bp->b_vp, bp);
3102 info->bvary[info->bvsize] = bp;
3103 toff = bp->b_bio2.bio_offset + bp->b_dirtyoff;
3104 if (info->bvsize == 0 || toff < info->beg_off)
3105 info->beg_off = toff;
3106 toff += (off_t)(bp->b_dirtyend - bp->b_dirtyoff);
3107 if (info->bvsize == 0 || toff > info->end_off)
3108 info->end_off = toff;
3110 if (info->bvsize == NFS_COMMITBVECSIZ) {
3111 error = nfs_flush_docommit(info, 0);
3112 KKASSERT(info->bvsize == 0);
3121 nfs_flush_docommit(struct nfs_flush_info *info, int error)
3131 if (info->bvsize > 0) {
3133 * Commit data on the server, as required. Note that
3134 * nfs_commit will use the vnode's cred for the commit.
3135 * The NFSv3 commit RPC is limited to a 32 bit byte count.
3137 bytes = info->end_off - info->beg_off;
3138 if (bytes > 0x40000000)
3143 retv = nfs_commit(vp, info->beg_off,
3144 (int)bytes, info->td);
3145 if (retv == NFSERR_STALEWRITEVERF)
3146 nfs_clearcommit(vp->v_mount);
3150 * Now, either mark the blocks I/O done or mark the
3151 * blocks dirty, depending on whether the commit
3154 for (i = 0; i < info->bvsize; ++i) {
3155 bp = info->bvary[i];
3156 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
3159 * Error, leave B_DELWRI intact
3161 vfs_unbusy_pages(bp);
3162 bp->b_cmd = BUF_CMD_DONE;
3166 * Success, remove B_DELWRI ( bundirty() ).
3168 * b_dirtyoff/b_dirtyend seem to be NFS
3169 * specific. We should probably move that
3170 * into bundirty(). XXX
3172 * We are faking an I/O write, we have to
3173 * start the transaction in order to
3174 * immediately biodone() it.
3177 bp->b_flags |= B_ASYNC;
3179 bp->b_flags &= ~B_ERROR;
3180 bp->b_dirtyoff = bp->b_dirtyend = 0;
3182 biodone(&bp->b_bio1);
3191 * NFS advisory byte-level locks.
3192 * Currently unsupported.
3194 * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl,
3198 nfs_advlock(struct vop_advlock_args *ap)
3200 struct nfsnode *np = VTONFS(ap->a_vp);
3203 * The following kludge is to allow diskless support to work
3204 * until a real NFS lockd is implemented. Basically, just pretend
3205 * that this is a local lock.
3207 return (lf_advlock(ap, &(np->n_lockf), np->n_size));
3211 * Print out the contents of an nfsnode.
3213 * nfs_print(struct vnode *a_vp)
3216 nfs_print(struct vop_print_args *ap)
3218 struct vnode *vp = ap->a_vp;
3219 struct nfsnode *np = VTONFS(vp);
3221 printf("tag VT_NFS, fileid %ld fsid 0x%x",
3222 np->n_vattr.va_fileid, np->n_vattr.va_fsid);
3223 if (vp->v_type == VFIFO)
3230 * nfs special file access vnode op.
3231 * Essentially just get vattr and then imitate iaccess() since the device is
3232 * local to the client.
3234 * nfsspec_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
3235 * struct thread *a_td)
3238 nfsspec_access(struct vop_access_args *ap)
3242 struct ucred *cred = ap->a_cred;
3243 struct vnode *vp = ap->a_vp;
3244 mode_t mode = ap->a_mode;
3250 * Disallow write attempts on filesystems mounted read-only;
3251 * unless the file is a socket, fifo, or a block or character
3252 * device resident on the filesystem.
3254 if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3255 switch (vp->v_type) {
3265 * If you're the super-user,
3266 * you always get access.
3268 if (cred->cr_uid == 0)
3271 error = VOP_GETATTR(vp, vap);
3275 * Access check is based on only one of owner, group, public.
3276 * If not owner, then check group. If not a member of the
3277 * group, then check public access.
3279 if (cred->cr_uid != vap->va_uid) {
3281 gp = cred->cr_groups;
3282 for (i = 0; i < cred->cr_ngroups; i++, gp++)
3283 if (vap->va_gid == *gp)
3289 error = (vap->va_mode & mode) == mode ? 0 : EACCES;
3294 * Read wrapper for special devices.
3296 * nfsspec_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3297 * struct ucred *a_cred)
3300 nfsspec_read(struct vop_read_args *ap)
3302 struct nfsnode *np = VTONFS(ap->a_vp);
3308 getnanotime(&np->n_atim);
3309 return (VOCALL(spec_vnode_vops, &ap->a_head));
3313 * Write wrapper for special devices.
3315 * nfsspec_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3316 * struct ucred *a_cred)
3319 nfsspec_write(struct vop_write_args *ap)
3321 struct nfsnode *np = VTONFS(ap->a_vp);
3327 getnanotime(&np->n_mtim);
3328 return (VOCALL(spec_vnode_vops, &ap->a_head));
3332 * Close wrapper for special devices.
3334 * Update the times on the nfsnode then do device close.
3336 * nfsspec_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
3337 * struct thread *a_td)
3340 nfsspec_close(struct vop_close_args *ap)
3342 struct vnode *vp = ap->a_vp;
3343 struct nfsnode *np = VTONFS(vp);
3346 if (np->n_flag & (NACC | NUPD)) {
3348 if (vp->v_usecount == 1 &&
3349 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3351 if (np->n_flag & NACC)
3352 vattr.va_atime = np->n_atim;
3353 if (np->n_flag & NUPD)
3354 vattr.va_mtime = np->n_mtim;
3355 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE));
3358 return (VOCALL(spec_vnode_vops, &ap->a_head));
3362 * Read wrapper for fifos.
3364 * nfsfifo_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3365 * struct ucred *a_cred)
3368 nfsfifo_read(struct vop_read_args *ap)
3370 struct nfsnode *np = VTONFS(ap->a_vp);
3376 getnanotime(&np->n_atim);
3377 return (VOCALL(fifo_vnode_vops, &ap->a_head));
3381 * Write wrapper for fifos.
3383 * nfsfifo_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
3384 * struct ucred *a_cred)
3387 nfsfifo_write(struct vop_write_args *ap)
3389 struct nfsnode *np = VTONFS(ap->a_vp);
3395 getnanotime(&np->n_mtim);
3396 return (VOCALL(fifo_vnode_vops, &ap->a_head));
3400 * Close wrapper for fifos.
3402 * Update the times on the nfsnode then do fifo close.
3404 * nfsfifo_close(struct vnode *a_vp, int a_fflag, struct thread *a_td)
3407 nfsfifo_close(struct vop_close_args *ap)
3409 struct vnode *vp = ap->a_vp;
3410 struct nfsnode *np = VTONFS(vp);
3414 if (np->n_flag & (NACC | NUPD)) {
3416 if (np->n_flag & NACC)
3418 if (np->n_flag & NUPD)
3421 if (vp->v_usecount == 1 &&
3422 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3424 if (np->n_flag & NACC)
3425 vattr.va_atime = np->n_atim;
3426 if (np->n_flag & NUPD)
3427 vattr.va_mtime = np->n_mtim;
3428 (void)VOP_SETATTR(vp, &vattr, nfs_vpcred(vp, ND_WRITE));
3431 return (VOCALL(fifo_vnode_vops, &ap->a_head));