kernel/vfs: Remove some unused variables.
[dragonfly.git] / sys / vfs / nfs / nfs_vnops.c
CommitLineData
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1/*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
23 *
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
34 * SUCH DAMAGE.
35 *
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 */
39
40
41/*
42 * vnode op calls for Sun NFS version 2 and 3
43 */
44
45#include "opt_inet.h"
46
47#include <sys/param.h>
48#include <sys/kernel.h>
49#include <sys/systm.h>
50#include <sys/resourcevar.h>
51#include <sys/proc.h>
52#include <sys/mount.h>
53#include <sys/buf.h>
54#include <sys/malloc.h>
55#include <sys/mbuf.h>
56#include <sys/namei.h>
fad57d0e 57#include <sys/nlookup.h>
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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>
63#include <sys/stat.h>
64#include <sys/sysctl.h>
65#include <sys/conf.h>
66
67#include <vm/vm.h>
68#include <vm/vm_extern.h>
984263bc 69
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70#include <sys/buf2.h>
71
1f2de5d4 72#include <vfs/fifofs/fifo.h>
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73#include <vfs/ufs/dir.h>
74
75#undef DIRBLKSIZ
984263bc 76
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77#include "rpcv2.h"
78#include "nfsproto.h"
79#include "nfs.h"
1f2de5d4 80#include "nfsmount.h"
c1cf1e59 81#include "nfsnode.h"
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82#include "xdr_subs.h"
83#include "nfsm_subs.h"
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84
85#include <net/if.h>
86#include <netinet/in.h>
87#include <netinet/in_var.h>
88
165dba55
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89#include <sys/thread2.h>
90
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91/* Defs */
92#define TRUE 1
93#define FALSE 0
94
a6ee311a
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95static int nfsfifo_read (struct vop_read_args *);
96static int nfsfifo_write (struct vop_write_args *);
a6ee311a 97static int nfsfifo_close (struct vop_close_args *);
a6ee311a 98static int nfs_setattrrpc (struct vnode *,struct vattr *,struct ucred *,struct thread *);
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99static int nfs_lookup (struct vop_old_lookup_args *);
100static int nfs_create (struct vop_old_create_args *);
101static int nfs_mknod (struct vop_old_mknod_args *);
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102static int nfs_open (struct vop_open_args *);
103static int nfs_close (struct vop_close_args *);
104static int nfs_access (struct vop_access_args *);
105static int nfs_getattr (struct vop_getattr_args *);
106static int nfs_setattr (struct vop_setattr_args *);
107static int nfs_read (struct vop_read_args *);
108static int nfs_mmap (struct vop_mmap_args *);
109static int nfs_fsync (struct vop_fsync_args *);
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110static int nfs_remove (struct vop_old_remove_args *);
111static int nfs_link (struct vop_old_link_args *);
112static int nfs_rename (struct vop_old_rename_args *);
113static int nfs_mkdir (struct vop_old_mkdir_args *);
114static int nfs_rmdir (struct vop_old_rmdir_args *);
115static int nfs_symlink (struct vop_old_symlink_args *);
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116static int nfs_readdir (struct vop_readdir_args *);
117static int nfs_bmap (struct vop_bmap_args *);
118static int nfs_strategy (struct vop_strategy_args *);
119static int nfs_lookitup (struct vnode *, const char *, int,
120 struct ucred *, struct thread *, struct nfsnode **);
121static int nfs_sillyrename (struct vnode *,struct vnode *,struct componentname *);
8be7edad 122static int nfs_laccess (struct vop_access_args *);
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123static int nfs_readlink (struct vop_readlink_args *);
124static int nfs_print (struct vop_print_args *);
125static int nfs_advlock (struct vop_advlock_args *);
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126
127static int nfs_nresolve (struct vop_nresolve_args *);
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128/*
129 * Global vfs data structures for nfs
130 */
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131struct vop_ops nfsv2_vnode_vops = {
132 .vop_default = vop_defaultop,
133 .vop_access = nfs_access,
134 .vop_advlock = nfs_advlock,
135 .vop_bmap = nfs_bmap,
136 .vop_close = nfs_close,
137 .vop_old_create = nfs_create,
138 .vop_fsync = nfs_fsync,
139 .vop_getattr = nfs_getattr,
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140 .vop_getpages = vop_stdgetpages,
141 .vop_putpages = vop_stdputpages,
66a1ddf5 142 .vop_inactive = nfs_inactive,
66a1ddf5 143 .vop_old_link = nfs_link,
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144 .vop_old_lookup = nfs_lookup,
145 .vop_old_mkdir = nfs_mkdir,
146 .vop_old_mknod = nfs_mknod,
147 .vop_mmap = nfs_mmap,
148 .vop_open = nfs_open,
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149 .vop_print = nfs_print,
150 .vop_read = nfs_read,
151 .vop_readdir = nfs_readdir,
152 .vop_readlink = nfs_readlink,
153 .vop_reclaim = nfs_reclaim,
154 .vop_old_remove = nfs_remove,
155 .vop_old_rename = nfs_rename,
156 .vop_old_rmdir = nfs_rmdir,
157 .vop_setattr = nfs_setattr,
158 .vop_strategy = nfs_strategy,
159 .vop_old_symlink = nfs_symlink,
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160 .vop_write = nfs_write,
161 .vop_nresolve = nfs_nresolve
984263bc 162};
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163
164/*
165 * Special device vnode ops
166 */
66a1ddf5 167struct vop_ops nfsv2_spec_vops = {
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168 .vop_default = vop_defaultop,
169 .vop_access = nfs_laccess,
170 .vop_close = nfs_close,
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171 .vop_fsync = nfs_fsync,
172 .vop_getattr = nfs_getattr,
173 .vop_inactive = nfs_inactive,
66a1ddf5 174 .vop_print = nfs_print,
8be7edad 175 .vop_read = vop_stdnoread,
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176 .vop_reclaim = nfs_reclaim,
177 .vop_setattr = nfs_setattr,
8be7edad 178 .vop_write = vop_stdnowrite
984263bc 179};
984263bc 180
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181struct vop_ops nfsv2_fifo_vops = {
182 .vop_default = fifo_vnoperate,
8be7edad 183 .vop_access = nfs_laccess,
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184 .vop_close = nfsfifo_close,
185 .vop_fsync = nfs_fsync,
186 .vop_getattr = nfs_getattr,
187 .vop_inactive = nfs_inactive,
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188 .vop_print = nfs_print,
189 .vop_read = nfsfifo_read,
190 .vop_reclaim = nfs_reclaim,
191 .vop_setattr = nfs_setattr,
66a1ddf5 192 .vop_write = nfsfifo_write
984263bc 193};
984263bc 194
a6ee311a 195static int nfs_mknodrpc (struct vnode *dvp, struct vnode **vpp,
984263bc 196 struct componentname *cnp,
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197 struct vattr *vap);
198static int nfs_removerpc (struct vnode *dvp, const char *name,
984263bc 199 int namelen,
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200 struct ucred *cred, struct thread *td);
201static int nfs_renamerpc (struct vnode *fdvp, const char *fnameptr,
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202 int fnamelen, struct vnode *tdvp,
203 const char *tnameptr, int tnamelen,
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204 struct ucred *cred, struct thread *td);
205static int nfs_renameit (struct vnode *sdvp,
984263bc 206 struct componentname *scnp,
a6ee311a 207 struct sillyrename *sp);
984263bc 208
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209SYSCTL_DECL(_vfs_nfs);
210
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211static int nfs_flush_on_rename = 1;
212SYSCTL_INT(_vfs_nfs, OID_AUTO, flush_on_rename, CTLFLAG_RW,
213 &nfs_flush_on_rename, 0, "flush fvp prior to rename");
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214static int nfs_flush_on_hlink = 0;
215SYSCTL_INT(_vfs_nfs, OID_AUTO, flush_on_hlink, CTLFLAG_RW,
216 &nfs_flush_on_hlink, 0, "flush fvp prior to hard link");
a482a28a 217
97100839 218static int nfsaccess_cache_timeout = NFS_DEFATTRTIMO;
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219SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
220 &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
221
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222static int nfsneg_cache_timeout = NFS_MINATTRTIMO;
223SYSCTL_INT(_vfs_nfs, OID_AUTO, neg_cache_timeout, CTLFLAG_RW,
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224 &nfsneg_cache_timeout, 0, "NFS NEGATIVE NAMECACHE timeout");
225
226static int nfspos_cache_timeout = NFS_MINATTRTIMO;
227SYSCTL_INT(_vfs_nfs, OID_AUTO, pos_cache_timeout, CTLFLAG_RW,
228 &nfspos_cache_timeout, 0, "NFS POSITIVE NAMECACHE timeout");
4d17b298 229
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230static int nfsv3_commit_on_close = 0;
231SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW,
232 &nfsv3_commit_on_close, 0, "write+commit on close, else only write");
233#if 0
234SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD,
235 &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count");
236
237SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD,
238 &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count");
239#endif
240
241#define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \
242 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \
243 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP)
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244
245/*
246 * Returns whether a name component is a degenerate '.' or '..'.
247 */
248static __inline
249int
250nlcdegenerate(struct nlcomponent *nlc)
251{
252 if (nlc->nlc_namelen == 1 && nlc->nlc_nameptr[0] == '.')
253 return(1);
254 if (nlc->nlc_namelen == 2 &&
255 nlc->nlc_nameptr[0] == '.' && nlc->nlc_nameptr[1] == '.')
256 return(1);
257 return(0);
258}
259
984263bc 260static int
dadab5e9 261nfs3_access_otw(struct vnode *vp, int wmode,
e851b29e 262 struct thread *td, struct ucred *cred)
984263bc 263{
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264 struct nfsnode *np = VTONFS(vp);
265 int attrflag;
266 int error = 0;
984263bc 267 u_int32_t *tl;
984263bc 268 u_int32_t rmode;
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269 struct nfsm_info info;
270
271 info.mrep = NULL;
272 info.v3 = 1;
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273
274 nfsstats.rpccnt[NFSPROC_ACCESS]++;
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275 nfsm_reqhead(&info, vp, NFSPROC_ACCESS,
276 NFSX_FH(info.v3) + NFSX_UNSIGNED);
277 ERROROUT(nfsm_fhtom(&info, vp));
278 tl = nfsm_build(&info, NFSX_UNSIGNED);
984263bc 279 *tl = txdr_unsigned(wmode);
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280 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_ACCESS, td, cred, &error));
281 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, NFS_LATTR_NOSHRINK));
282 if (error == 0) {
283 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
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284 rmode = fxdr_unsigned(u_int32_t, *tl);
285 np->n_mode = rmode;
286 np->n_modeuid = cred->cr_uid;
3a6f9faf 287 np->n_modestamp = mycpu->gd_time_seconds;
984263bc 288 }
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289 m_freem(info.mrep);
290 info.mrep = NULL;
6b08710e 291nfsmout:
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292 return error;
293}
294
295/*
296 * nfs access vnode op.
297 * For nfs version 2, just return ok. File accesses may fail later.
298 * For nfs version 3, use the access rpc to check accessibility. If file modes
299 * are changed on the server, accesses might still fail later.
e851b29e 300 *
b478fdce 301 * nfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
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302 */
303static int
e851b29e 304nfs_access(struct vop_access_args *ap)
984263bc 305{
40822939 306 struct ucred *cred;
40393ded 307 struct vnode *vp = ap->a_vp;
87de5057 308 thread_t td = curthread;
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309 int error = 0;
310 u_int32_t mode, wmode;
984263bc 311 struct nfsnode *np = VTONFS(vp);
c6b43e93 312 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
42edf14f 313 int v3 = NFS_ISV3(vp);
984263bc 314
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315 lwkt_gettoken(&nmp->nm_token);
316
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317 /*
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.
321 */
322 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
323 switch (vp->v_type) {
324 case VREG:
325 case VDIR:
326 case VLNK:
c6b43e93 327 lwkt_reltoken(&nmp->nm_token);
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328 return (EROFS);
329 default:
330 break;
331 }
332 }
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333
334 /*
335 * The NFS protocol passes only the effective uid/gid over the wire but
336 * we need to check access against real ids if AT_EACCESS not set.
337 * Handle this case by cloning the credentials and setting the
338 * effective ids to the real ones.
339 */
340 if (ap->a_flags & AT_EACCESS) {
341 cred = crhold(ap->a_cred);
342 } else {
343 cred = crdup(ap->a_cred);
344 cred->cr_uid = cred->cr_ruid;
345 cred->cr_gid = cred->cr_rgid;
346 }
347
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348 /*
349 * For nfs v3, check to see if we have done this recently, and if
350 * so return our cached result instead of making an ACCESS call.
351 * If not, do an access rpc, otherwise you are stuck emulating
352 * ufs_access() locally using the vattr. This may not be correct,
353 * since the server may apply other access criteria such as
354 * client uid-->server uid mapping that we do not know about.
355 */
356 if (v3) {
357 if (ap->a_mode & VREAD)
358 mode = NFSV3ACCESS_READ;
359 else
360 mode = 0;
361 if (vp->v_type != VDIR) {
362 if (ap->a_mode & VWRITE)
363 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
364 if (ap->a_mode & VEXEC)
365 mode |= NFSV3ACCESS_EXECUTE;
366 } else {
367 if (ap->a_mode & VWRITE)
368 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
369 NFSV3ACCESS_DELETE);
370 if (ap->a_mode & VEXEC)
371 mode |= NFSV3ACCESS_LOOKUP;
372 }
373 /* XXX safety belt, only make blanket request if caching */
374 if (nfsaccess_cache_timeout > 0) {
375 wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY |
376 NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE |
377 NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP;
378 } else {
379 wmode = mode;
380 }
381
382 /*
383 * Does our cached result allow us to give a definite yes to
384 * this request?
385 */
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386 if (np->n_modestamp &&
387 (mycpu->gd_time_seconds < (np->n_modestamp + nfsaccess_cache_timeout)) &&
40822939 388 (cred->cr_uid == np->n_modeuid) &&
fad57d0e 389 ((np->n_mode & mode) == mode)) {
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390 nfsstats.accesscache_hits++;
391 } else {
392 /*
393 * Either a no, or a don't know. Go to the wire.
394 */
395 nfsstats.accesscache_misses++;
40822939 396 error = nfs3_access_otw(vp, wmode, td, cred);
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397 if (!error) {
398 if ((np->n_mode & mode) != mode) {
399 error = EACCES;
400 }
401 }
402 }
984263bc 403 } else {
40822939
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404 if ((error = nfs_laccess(ap)) != 0) {
405 crfree(cred);
c6b43e93 406 lwkt_reltoken(&nmp->nm_token);
984263bc 407 return (error);
40822939 408 }
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409
410 /*
411 * Attempt to prevent a mapped root from accessing a file
412 * which it shouldn't. We try to read a byte from the file
413 * if the user is root and the file is not zero length.
8be7edad 414 * After calling nfs_laccess, we should have the correct
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415 * file size cached.
416 */
40822939 417 if (cred->cr_uid == 0 && (ap->a_mode & VREAD)
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418 && VTONFS(vp)->n_size > 0) {
419 struct iovec aiov;
420 struct uio auio;
421 char buf[1];
422
423 aiov.iov_base = buf;
424 aiov.iov_len = 1;
425 auio.uio_iov = &aiov;
426 auio.uio_iovcnt = 1;
427 auio.uio_offset = 0;
428 auio.uio_resid = 1;
429 auio.uio_segflg = UIO_SYSSPACE;
430 auio.uio_rw = UIO_READ;
87de5057 431 auio.uio_td = td;
984263bc 432
c1cf1e59 433 if (vp->v_type == VREG) {
edb90c22 434 error = nfs_readrpc_uio(vp, &auio);
c1cf1e59 435 } else if (vp->v_type == VDIR) {
984263bc 436 char* bp;
efda3bd0 437 bp = kmalloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
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438 aiov.iov_base = bp;
439 aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
cc7d050e 440 error = nfs_readdirrpc_uio(vp, &auio);
efda3bd0 441 kfree(bp, M_TEMP);
c1cf1e59 442 } else if (vp->v_type == VLNK) {
cc7d050e 443 error = nfs_readlinkrpc_uio(vp, &auio);
c1cf1e59 444 } else {
984263bc 445 error = EACCES;
c1cf1e59 446 }
984263bc 447 }
984263bc 448 }
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449 /*
450 * [re]record creds for reading and/or writing if access
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451 * was granted. Assume the NFS server will grant read access
452 * for execute requests.
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453 */
454 if (error == 0) {
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455 if ((ap->a_mode & (VREAD|VEXEC)) && cred != np->n_rucred) {
456 crhold(cred);
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457 if (np->n_rucred)
458 crfree(np->n_rucred);
40822939 459 np->n_rucred = cred;
c1cf1e59 460 }
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461 if ((ap->a_mode & VWRITE) && cred != np->n_wucred) {
462 crhold(cred);
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463 if (np->n_wucred)
464 crfree(np->n_wucred);
40822939 465 np->n_wucred = cred;
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466 }
467 }
c6b43e93 468 lwkt_reltoken(&nmp->nm_token);
40822939 469 crfree(cred);
c1cf1e59 470 return(error);
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471}
472
473/*
474 * nfs open vnode op
475 * Check to see if the type is ok
476 * and that deletion is not in progress.
477 * For paged in text files, you will need to flush the page cache
478 * if consistency is lost.
e851b29e 479 *
b478fdce
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480 * nfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
481 * struct file *a_fp)
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482 */
483/* ARGSUSED */
484static int
e851b29e 485nfs_open(struct vop_open_args *ap)
984263bc 486{
40393ded 487 struct vnode *vp = ap->a_vp;
984263bc 488 struct nfsnode *np = VTONFS(vp);
c6b43e93 489 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
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490 struct vattr vattr;
491 int error;
492
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493 lwkt_gettoken(&nmp->nm_token);
494
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495 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
496#ifdef DIAGNOSTIC
086c1d7e 497 kprintf("open eacces vtyp=%d\n",vp->v_type);
984263bc 498#endif
c6b43e93 499 lwkt_reltoken(&nmp->nm_token);
ca3a2b2f 500 return (EOPNOTSUPP);
984263bc 501 }
5a9187cb 502
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503 /*
504 * Save valid creds for reading and writing for later RPCs.
505 */
506 if ((ap->a_mode & FREAD) && ap->a_cred != np->n_rucred) {
507 crhold(ap->a_cred);
508 if (np->n_rucred)
509 crfree(np->n_rucred);
510 np->n_rucred = ap->a_cred;
511 }
512 if ((ap->a_mode & FWRITE) && ap->a_cred != np->n_wucred) {
513 crhold(ap->a_cred);
514 if (np->n_wucred)
515 crfree(np->n_wucred);
516 np->n_wucred = ap->a_cred;
517 }
518
984263bc 519 /*
5a9187cb
MD
520 * Clear the attribute cache only if opening with write access. It
521 * is unclear if we should do this at all here, but we certainly
522 * should not clear the cache unconditionally simply because a file
523 * is being opened.
984263bc 524 */
5a9187cb
MD
525 if (ap->a_mode & FWRITE)
526 np->n_attrstamp = 0;
527
e07fef60
MD
528 /*
529 * For normal NFS, reconcile changes made locally verses
530 * changes made remotely. Note that VOP_GETATTR only goes
531 * to the wire if the cached attribute has timed out or been
532 * cleared.
533 *
534 * If local modifications have been made clear the attribute
535 * cache to force an attribute and modified time check. If
536 * GETATTR detects that the file has been changed by someone
537 * other then us it will set NRMODIFIED.
538 *
539 * If we are opening a directory and local changes have been
540 * made we have to invalidate the cache in order to ensure
541 * that we get the most up-to-date information from the
542 * server. XXX
543 */
544 if (np->n_flag & NLMODIFIED) {
545 np->n_attrstamp = 0;
546 if (vp->v_type == VDIR) {
87de5057 547 error = nfs_vinvalbuf(vp, V_SAVE, 1);
5a9187cb
MD
548 if (error == EINTR)
549 return (error);
e07fef60 550 nfs_invaldir(vp);
5a9187cb 551 }
984263bc 552 }
87de5057 553 error = VOP_GETATTR(vp, &vattr);
c6b43e93
MD
554 if (error) {
555 lwkt_reltoken(&nmp->nm_token);
e07fef60 556 return (error);
c6b43e93 557 }
e07fef60
MD
558 if (np->n_flag & NRMODIFIED) {
559 if (vp->v_type == VDIR)
560 nfs_invaldir(vp);
87de5057 561 error = nfs_vinvalbuf(vp, V_SAVE, 1);
c6b43e93
MD
562 if (error == EINTR) {
563 lwkt_reltoken(&nmp->nm_token);
e07fef60 564 return (error);
c6b43e93 565 }
e07fef60
MD
566 np->n_flag &= ~NRMODIFIED;
567 }
c6b43e93
MD
568 error = vop_stdopen(ap);
569 lwkt_reltoken(&nmp->nm_token);
fad57d0e 570
c6b43e93 571 return error;
984263bc
MD
572}
573
574/*
575 * nfs close vnode op
576 * What an NFS client should do upon close after writing is a debatable issue.
577 * Most NFS clients push delayed writes to the server upon close, basically for
578 * two reasons:
579 * 1 - So that any write errors may be reported back to the client process
580 * doing the close system call. By far the two most likely errors are
581 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
582 * 2 - To put a worst case upper bound on cache inconsistency between
583 * multiple clients for the file.
584 * There is also a consistency problem for Version 2 of the protocol w.r.t.
585 * not being able to tell if other clients are writing a file concurrently,
586 * since there is no way of knowing if the changed modify time in the reply
587 * is only due to the write for this client.
588 * (NFS Version 3 provides weak cache consistency data in the reply that
589 * should be sufficient to detect and handle this case.)
590 *
591 * The current code does the following:
592 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
593 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
594 * or commit them (this satisfies 1 and 2 except for the
595 * case where the server crashes after this close but
596 * before the commit RPC, which is felt to be "good
597 * enough". Changing the last argument to nfs_flush() to
598 * a 1 would force a commit operation, if it is felt a
599 * commit is necessary now.
600 * for NQNFS - do nothing now, since 2 is dealt with via leases and
601 * 1 should be dealt with via an fsync() system call for
602 * cases where write errors are important.
e851b29e 603 *
b478fdce 604 * nfs_close(struct vnode *a_vp, int a_fflag)
984263bc
MD
605 */
606/* ARGSUSED */
607static int
e851b29e 608nfs_close(struct vop_close_args *ap)
984263bc 609{
40393ded
RG
610 struct vnode *vp = ap->a_vp;
611 struct nfsnode *np = VTONFS(vp);
c6b43e93 612 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
984263bc 613 int error = 0;
87de5057 614 thread_t td = curthread;
984263bc 615
c6b43e93
MD
616 lwkt_gettoken(&nmp->nm_token);
617
984263bc 618 if (vp->v_type == VREG) {
e07fef60 619 if (np->n_flag & NLMODIFIED) {
984263bc
MD
620 if (NFS_ISV3(vp)) {
621 /*
622 * Under NFSv3 we have dirty buffers to dispose of. We
623 * must flush them to the NFS server. We have the option
624 * of waiting all the way through the commit rpc or just
625 * waiting for the initial write. The default is to only
626 * wait through the initial write so the data is in the
627 * server's cache, which is roughly similar to the state
628 * a standard disk subsystem leaves the file in on close().
629 *
5a9187cb 630 * We cannot clear the NLMODIFIED bit in np->n_flag due to
984263bc
MD
631 * potential races with other processes, and certainly
632 * cannot clear it if we don't commit.
633 */
634 int cm = nfsv3_commit_on_close ? 1 : 0;
87de5057 635 error = nfs_flush(vp, MNT_WAIT, td, cm);
5a9187cb 636 /* np->n_flag &= ~NLMODIFIED; */
984263bc 637 } else {
87de5057 638 error = nfs_vinvalbuf(vp, V_SAVE, 1);
984263bc
MD
639 }
640 np->n_attrstamp = 0;
641 }
642 if (np->n_flag & NWRITEERR) {
643 np->n_flag &= ~NWRITEERR;
644 error = np->n_error;
645 }
646 }
8ddc6004 647 vop_stdclose(ap);
c6b43e93
MD
648 lwkt_reltoken(&nmp->nm_token);
649
984263bc
MD
650 return (error);
651}
652
653/*
654 * nfs getattr call from vfs.
e851b29e 655 *
b478fdce 656 * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap)
984263bc
MD
657 */
658static int
e851b29e 659nfs_getattr(struct vop_getattr_args *ap)
984263bc 660{
40393ded
RG
661 struct vnode *vp = ap->a_vp;
662 struct nfsnode *np = VTONFS(vp);
6a9301d9 663 struct nfsmount *nmp;
984263bc 664 int error = 0;
87de5057 665 thread_t td = curthread;
42edf14f
MD
666 struct nfsm_info info;
667
668 info.mrep = NULL;
669 info.v3 = NFS_ISV3(vp);
6a9301d9 670 nmp = VFSTONFS(vp->v_mount);
c6b43e93
MD
671
672 lwkt_gettoken(&nmp->nm_token);
984263bc
MD
673
674 /*
675 * Update local times for special files.
676 */
677 if (np->n_flag & (NACC | NUPD))
678 np->n_flag |= NCHG;
679 /*
680 * First look in the cache.
681 */
682 if (nfs_getattrcache(vp, ap->a_vap) == 0)
6a9301d9 683 goto done;
984263bc 684
42edf14f 685 if (info.v3 && nfsaccess_cache_timeout > 0) {
984263bc 686 nfsstats.accesscache_misses++;
87de5057 687 nfs3_access_otw(vp, NFSV3ACCESS_ALL, td, nfs_vpcred(vp, ND_CHECK));
984263bc 688 if (nfs_getattrcache(vp, ap->a_vap) == 0)
6a9301d9 689 goto done;
984263bc
MD
690 }
691
692 nfsstats.rpccnt[NFSPROC_GETATTR]++;
42edf14f
MD
693 nfsm_reqhead(&info, vp, NFSPROC_GETATTR, NFSX_FH(info.v3));
694 ERROROUT(nfsm_fhtom(&info, vp));
695 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_GETATTR, td,
696 nfs_vpcred(vp, ND_CHECK), &error));
697 if (error == 0) {
698 ERROROUT(nfsm_loadattr(&info, vp, ap->a_vap));
984263bc 699 }
42edf14f
MD
700 m_freem(info.mrep);
701 info.mrep = NULL;
6a9301d9
MD
702done:
703 /*
704 * NFS doesn't support chflags flags. If the nfs mount was
705 * made -o cache set the UF_CACHE bit for swapcache.
706 */
707 if ((nmp->nm_flag & NFSMNT_CACHE) && (vp->v_flag & VROOT))
708 ap->a_vap->va_flags |= UF_CACHE;
6b08710e 709nfsmout:
c6b43e93 710 lwkt_reltoken(&nmp->nm_token);
984263bc
MD
711 return (error);
712}
713
714/*
715 * nfs setattr call.
e851b29e 716 *
31bd717a 717 * nfs_setattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred)
984263bc
MD
718 */
719static int
e851b29e 720nfs_setattr(struct vop_setattr_args *ap)
984263bc 721{
40393ded
RG
722 struct vnode *vp = ap->a_vp;
723 struct nfsnode *np = VTONFS(vp);
c6b43e93 724 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
40393ded 725 struct vattr *vap = ap->a_vap;
984263bc 726 int error = 0;
a63246d1 727 off_t tsize;
87de5057 728 thread_t td = curthread;
984263bc
MD
729
730#ifndef nolint
a63246d1 731 tsize = (off_t)0;
984263bc 732#endif
984263bc
MD
733 /*
734 * Setting of flags is not supported.
735 */
736 if (vap->va_flags != VNOVAL)
737 return (EOPNOTSUPP);
738
739 /*
740 * Disallow write attempts if the filesystem is mounted read-only.
741 */
742 if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
743 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
744 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
745 (vp->v_mount->mnt_flag & MNT_RDONLY))
746 return (EROFS);
a482a28a 747
c6b43e93
MD
748 lwkt_gettoken(&nmp->nm_token);
749
984263bc 750 if (vap->va_size != VNOVAL) {
a482a28a
MD
751 /*
752 * truncation requested
753 */
984263bc
MD
754 switch (vp->v_type) {
755 case VDIR:
c6b43e93 756 lwkt_reltoken(&nmp->nm_token);
984263bc
MD
757 return (EISDIR);
758 case VCHR:
759 case VBLK:
760 case VSOCK:
761 case VFIFO:
762 if (vap->va_mtime.tv_sec == VNOVAL &&
763 vap->va_atime.tv_sec == VNOVAL &&
764 vap->va_mode == (mode_t)VNOVAL &&
765 vap->va_uid == (uid_t)VNOVAL &&
c6b43e93
MD
766 vap->va_gid == (gid_t)VNOVAL) {
767 lwkt_reltoken(&nmp->nm_token);
984263bc 768 return (0);
c6b43e93 769 }
984263bc
MD
770 vap->va_size = VNOVAL;
771 break;
772 default:
773 /*
774 * Disallow write attempts if the filesystem is
775 * mounted read-only.
776 */
c6b43e93
MD
777 if (vp->v_mount->mnt_flag & MNT_RDONLY) {
778 lwkt_reltoken(&nmp->nm_token);
984263bc 779 return (EROFS);
c6b43e93 780 }
984263bc 781
984263bc 782 tsize = np->n_size;
a004bca6 783again:
8452310f 784 error = nfs_meta_setsize(vp, td, vap->va_size, 0);
984263bc 785
8452310f 786#if 0
5a9187cb 787 if (np->n_flag & NLMODIFIED) {
984263bc 788 if (vap->va_size == 0)
87de5057 789 error = nfs_vinvalbuf(vp, 0, 1);
984263bc 790 else
87de5057 791 error = nfs_vinvalbuf(vp, V_SAVE, 1);
984263bc 792 }
8452310f 793#endif
a004bca6
MD
794 /*
795 * note: this loop case almost always happens at
796 * least once per truncation.
b07fc55c 797 */
a004bca6
MD
798 if (error == 0 && np->n_size != vap->va_size)
799 goto again;
800 np->n_vattr.va_size = vap->va_size;
5a9187cb
MD
801 break;
802 }
a482a28a
MD
803 } else if ((np->n_flag & NLMODIFIED) && vp->v_type == VREG) {
804 /*
805 * What to do. If we are modifying the mtime we lose
806 * mtime detection of changes made by the server or other
807 * clients. But programs like rsync/rdist/cpdup are going
808 * to call utimes a lot. We don't want to piecemeal sync.
809 *
810 * For now sync if any prior remote changes were detected,
811 * but allow us to lose track of remote changes made during
812 * the utimes operation.
813 */
814 if (np->n_flag & NRMODIFIED)
815 error = nfs_vinvalbuf(vp, V_SAVE, 1);
816 if (error == EINTR)
817 return (error);
818 if (error == 0) {
819 if (vap->va_mtime.tv_sec != VNOVAL) {
820 np->n_mtime = vap->va_mtime.tv_sec;
821 }
822 }
a004bca6 823 }
87de5057 824 error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
a004bca6
MD
825
826 /*
827 * Sanity check if a truncation was issued. This should only occur
828 * if multiple processes are racing on the same file.
829 */
830 if (error == 0 && vap->va_size != VNOVAL &&
831 np->n_size != vap->va_size) {
973c11b9 832 kprintf("NFS ftruncate: server disagrees on the file size: "
a63246d1
MD
833 "%jd/%jd/%jd\n",
834 (intmax_t)tsize,
835 (intmax_t)vap->va_size,
836 (intmax_t)np->n_size);
a004bca6
MD
837 goto again;
838 }
984263bc
MD
839 if (error && vap->va_size != VNOVAL) {
840 np->n_size = np->n_vattr.va_size = tsize;
8452310f 841 nfs_meta_setsize(vp, td, np->n_size, 0);
984263bc 842 }
c6b43e93
MD
843 lwkt_reltoken(&nmp->nm_token);
844
984263bc
MD
845 return (error);
846}
847
848/*
849 * Do an nfs setattr rpc.
850 */
851static int
dadab5e9 852nfs_setattrrpc(struct vnode *vp, struct vattr *vap,
e851b29e 853 struct ucred *cred, struct thread *td)
984263bc 854{
40393ded 855 struct nfsv2_sattr *sp;
999914df 856 struct nfsnode *np = VTONFS(vp);
984263bc
MD
857 u_int32_t *tl;
858 int error = 0, wccflag = NFSV3_WCCRATTR;
42edf14f
MD
859 struct nfsm_info info;
860
861 info.mrep = NULL;
862 info.v3 = NFS_ISV3(vp);
984263bc
MD
863
864 nfsstats.rpccnt[NFSPROC_SETATTR]++;
42edf14f
MD
865 nfsm_reqhead(&info, vp, NFSPROC_SETATTR,
866 NFSX_FH(info.v3) + NFSX_SATTR(info.v3));
867 ERROROUT(nfsm_fhtom(&info, vp));
868 if (info.v3) {
869 nfsm_v3attrbuild(&info, vap, TRUE);
870 tl = nfsm_build(&info, NFSX_UNSIGNED);
984263bc
MD
871 *tl = nfs_false;
872 } else {
42edf14f 873 sp = nfsm_build(&info, NFSX_V2SATTR);
984263bc
MD
874 if (vap->va_mode == (mode_t)VNOVAL)
875 sp->sa_mode = nfs_xdrneg1;
876 else
877 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
878 if (vap->va_uid == (uid_t)VNOVAL)
879 sp->sa_uid = nfs_xdrneg1;
880 else
881 sp->sa_uid = txdr_unsigned(vap->va_uid);
882 if (vap->va_gid == (gid_t)VNOVAL)
883 sp->sa_gid = nfs_xdrneg1;
884 else
885 sp->sa_gid = txdr_unsigned(vap->va_gid);
886 sp->sa_size = txdr_unsigned(vap->va_size);
887 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
888 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
889 }
42edf14f
MD
890 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_SETATTR, td, cred, &error));
891 if (info.v3) {
999914df 892 np->n_modestamp = 0;
42edf14f
MD
893 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag));
894 } else {
895 ERROROUT(nfsm_loadattr(&info, vp, NULL));
896 }
897 m_freem(info.mrep);
898 info.mrep = NULL;
6b08710e 899nfsmout:
984263bc
MD
900 return (error);
901}
902
a15b4eef
MD
903static
904void
905nfs_cache_setvp(struct nchandle *nch, struct vnode *vp, int nctimeout)
906{
907 if (nctimeout == 0)
908 nctimeout = 1;
909 else
910 nctimeout *= hz;
911 cache_setvp(nch, vp);
912 cache_settimeout(nch, nctimeout);
913}
914
fad57d0e
MD
915/*
916 * NEW API CALL - replaces nfs_lookup(). However, we cannot remove
917 * nfs_lookup() until all remaining new api calls are implemented.
918 *
919 * Resolve a namecache entry. This function is passed a locked ncp and
a15b4eef 920 * must call nfs_cache_setvp() on it as appropriate to resolve the entry.
fad57d0e
MD
921 */
922static int
923nfs_nresolve(struct vop_nresolve_args *ap)
924{
925 struct thread *td = curthread;
926 struct namecache *ncp;
c6b43e93 927 struct nfsmount *nmp;
fad57d0e
MD
928 struct nfsnode *np;
929 struct vnode *dvp;
930 struct vnode *nvp;
931 nfsfh_t *fhp;
932 int attrflag;
933 int fhsize;
934 int error;
046b7e33 935 int tmp_error;
fad57d0e 936 int len;
42edf14f 937 struct nfsm_info info;
fad57d0e 938
dff430ab 939 dvp = ap->a_dvp;
c6b43e93 940 nmp = VFSTONFS(dvp->v_mount);
fad57d0e 941
c6b43e93
MD
942 lwkt_gettoken(&nmp->nm_token);
943
944 if ((error = vget(dvp, LK_SHARED)) != 0) {
945 lwkt_reltoken(&nmp->nm_token);
fad57d0e 946 return (error);
c6b43e93 947 }
fad57d0e 948
42edf14f
MD
949 info.mrep = NULL;
950 info.v3 = NFS_ISV3(dvp);
951
fad57d0e 952 nvp = NULL;
fad57d0e
MD
953 nfsstats.lookupcache_misses++;
954 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
dff430ab 955 ncp = ap->a_nch->ncp;
fad57d0e 956 len = ncp->nc_nlen;
42edf14f
MD
957 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP,
958 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len));
959 ERROROUT(nfsm_fhtom(&info, dvp));
960 ERROROUT(nfsm_strtom(&info, ncp->nc_name, len, NFS_MAXNAMLEN));
961 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, td,
962 ap->a_cred, &error));
fad57d0e
MD
963 if (error) {
964 /*
965 * Cache negatve lookups to reduce NFS traffic, but use
966 * a fast timeout. Otherwise use a timeout of 1 tick.
967 * XXX we should add a namecache flag for no-caching
968 * to uncache the negative hit as soon as possible, but
969 * we cannot simply destroy the entry because it is used
970 * as a placeholder by the caller.
046b7e33
MD
971 *
972 * The refactored nfs code will overwrite a non-zero error
973 * with 0 when we use ERROROUT(), so don't here.
fad57d0e 974 */
a15b4eef
MD
975 if (error == ENOENT)
976 nfs_cache_setvp(ap->a_nch, NULL, nfsneg_cache_timeout);
046b7e33
MD
977 tmp_error = nfsm_postop_attr(&info, dvp, &attrflag,
978 NFS_LATTR_NOSHRINK);
979 if (tmp_error) {
980 error = tmp_error;
981 goto nfsmout;
982 }
42edf14f
MD
983 m_freem(info.mrep);
984 info.mrep = NULL;
fad57d0e
MD
985 goto nfsmout;
986 }
987
988 /*
989 * Success, get the file handle, do various checks, and load
990 * post-operation data from the reply packet. Theoretically
991 * we should never be looking up "." so, theoretically, we
992 * should never get the same file handle as our directory. But
993 * we check anyway. XXX
994 *
995 * Note that no timeout is set for the positive cache hit. We
996 * assume, theoretically, that ESTALE returns will be dealt with
997 * properly to handle NFS races and in anycase we cannot depend
998 * on a timeout to deal with NFS open/create/excl issues so instead
999 * of a bad hack here the rest of the NFS client code needs to do
1000 * the right thing.
1001 */
42edf14f 1002 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp));
fad57d0e
MD
1003
1004 np = VTONFS(dvp);
1005 if (NFS_CMPFH(np, fhp, fhsize)) {
1006 vref(dvp);
1007 nvp = dvp;
1008 } else {
c9682b51 1009 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np, NULL);
fad57d0e 1010 if (error) {
42edf14f
MD
1011 m_freem(info.mrep);
1012 info.mrep = NULL;
fad57d0e 1013 vput(dvp);
c6b43e93 1014 lwkt_reltoken(&nmp->nm_token);
fad57d0e
MD
1015 return (error);
1016 }
1017 nvp = NFSTOV(np);
1018 }
42edf14f
MD
1019 if (info.v3) {
1020 ERROROUT(nfsm_postop_attr(&info, nvp, &attrflag,
1021 NFS_LATTR_NOSHRINK));
1022 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag,
1023 NFS_LATTR_NOSHRINK));
fad57d0e 1024 } else {
42edf14f 1025 ERROROUT(nfsm_loadattr(&info, nvp, NULL));
fad57d0e 1026 }
a15b4eef 1027 nfs_cache_setvp(ap->a_nch, nvp, nfspos_cache_timeout);
42edf14f
MD
1028 m_freem(info.mrep);
1029 info.mrep = NULL;
fad57d0e 1030nfsmout:
c6b43e93 1031 lwkt_reltoken(&nmp->nm_token);
fad57d0e
MD
1032 vput(dvp);
1033 if (nvp) {
1034 if (nvp == dvp)
1035 vrele(nvp);
1036 else
1037 vput(nvp);
1038 }
1039 return (error);
1040}
1041
984263bc 1042/*
4d17b298 1043 * 'cached' nfs directory lookup
e851b29e 1044 *
fad57d0e
MD
1045 * NOTE: cannot be removed until NFS implements all the new n*() API calls.
1046 *
31bd717a
MD
1047 * nfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
1048 * struct componentname *a_cnp)
984263bc
MD
1049 */
1050static int
e62afb5f 1051nfs_lookup(struct vop_old_lookup_args *ap)
984263bc
MD
1052{
1053 struct componentname *cnp = ap->a_cnp;
1054 struct vnode *dvp = ap->a_dvp;
1055 struct vnode **vpp = ap->a_vpp;
1056 int flags = cnp->cn_flags;
1057 struct vnode *newvp;
c9682b51 1058 struct vnode *notvp;
984263bc 1059 struct nfsmount *nmp;
984263bc
MD
1060 long len;
1061 nfsfh_t *fhp;
1062 struct nfsnode *np;
046b7e33
MD
1063 int lockparent, wantparent, attrflag, fhsize;
1064 int error;
1065 int tmp_error;
42edf14f
MD
1066 struct nfsm_info info;
1067
1068 info.mrep = NULL;
1069 info.v3 = NFS_ISV3(dvp);
046b7e33 1070 error = 0;
984263bc 1071
c9682b51
MD
1072 notvp = (cnp->cn_flags & CNP_NOTVP) ? cnp->cn_notvp : NULL;
1073
4d17b298
MD
1074 /*
1075 * Read-only mount check and directory check.
1076 */
984263bc 1077 *vpp = NULLVP;
fad57d0e 1078 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) &&
2b69e610 1079 (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME))
984263bc 1080 return (EROFS);
4d17b298 1081
984263bc
MD
1082 if (dvp->v_type != VDIR)
1083 return (ENOTDIR);
4d17b298
MD
1084
1085 /*
1086 * Look it up in the cache. Note that ENOENT is only returned if we
1087 * previously entered a negative hit (see later on). The additional
1088 * nfsneg_cache_timeout check causes previously cached results to
1089 * be instantly ignored if the negative caching is turned off.
1090 */
2b69e610
MD
1091 lockparent = flags & CNP_LOCKPARENT;
1092 wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT);
984263bc
MD
1093 nmp = VFSTONFS(dvp->v_mount);
1094 np = VTONFS(dvp);
984263bc 1095
c6b43e93
MD
1096 lwkt_gettoken(&nmp->nm_token);
1097
4d17b298 1098 /*
fad57d0e 1099 * Go to the wire.
4d17b298 1100 */
984263bc
MD
1101 error = 0;
1102 newvp = NULLVP;
1103 nfsstats.lookupcache_misses++;
1104 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
1105 len = cnp->cn_namelen;
42edf14f
MD
1106 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP,
1107 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len));
1108 ERROROUT(nfsm_fhtom(&info, dvp));
1109 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, len, NFS_MAXNAMLEN));
1110 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, cnp->cn_td,
1111 cnp->cn_cred, &error));
984263bc 1112 if (error) {
046b7e33
MD
1113 tmp_error = nfsm_postop_attr(&info, dvp, &attrflag,
1114 NFS_LATTR_NOSHRINK);
1115 if (tmp_error) {
1116 error = tmp_error;
1117 goto nfsmout;
1118 }
1119
42edf14f
MD
1120 m_freem(info.mrep);
1121 info.mrep = NULL;
984263bc
MD
1122 goto nfsmout;
1123 }
42edf14f 1124 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp));
984263bc
MD
1125
1126 /*
1127 * Handle RENAME case...
1128 */
fad57d0e 1129 if (cnp->cn_nameiop == NAMEI_RENAME && wantparent) {
984263bc 1130 if (NFS_CMPFH(np, fhp, fhsize)) {
42edf14f
MD
1131 m_freem(info.mrep);
1132 info.mrep = NULL;
c6b43e93 1133 lwkt_reltoken(&nmp->nm_token);
984263bc
MD
1134 return (EISDIR);
1135 }
c9682b51 1136 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np, notvp);
984263bc 1137 if (error) {
42edf14f
MD
1138 m_freem(info.mrep);
1139 info.mrep = NULL;
c6b43e93 1140 lwkt_reltoken(&nmp->nm_token);
984263bc
MD
1141 return (error);
1142 }
1143 newvp = NFSTOV(np);
42edf14f
MD
1144 if (info.v3) {
1145 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag,
1146 NFS_LATTR_NOSHRINK));
1147 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag,
1148 NFS_LATTR_NOSHRINK));
1149 } else {
1150 ERROROUT(nfsm_loadattr(&info, newvp, NULL));
1151 }
984263bc 1152 *vpp = newvp;
42edf14f
MD
1153 m_freem(info.mrep);
1154 info.mrep = NULL;
7ab77df6 1155 if (!lockparent) {
a11aaa81 1156 vn_unlock(dvp);
7ab77df6
MD
1157 cnp->cn_flags |= CNP_PDIRUNLOCK;
1158 }
c6b43e93 1159 lwkt_reltoken(&nmp->nm_token);
984263bc
MD
1160 return (0);
1161 }
1162
2b69e610 1163 if (flags & CNP_ISDOTDOT) {
a11aaa81 1164 vn_unlock(dvp);
7ab77df6 1165 cnp->cn_flags |= CNP_PDIRUNLOCK;
c9682b51 1166 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np, notvp);
984263bc 1167 if (error) {
ca466bae 1168 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
7ab77df6 1169 cnp->cn_flags &= ~CNP_PDIRUNLOCK;
c6b43e93 1170 lwkt_reltoken(&nmp->nm_token);
7ab77df6 1171 return (error); /* NOTE: return error from nget */
984263bc
MD
1172 }
1173 newvp = NFSTOV(np);
fad57d0e 1174 if (lockparent) {
ca466bae 1175 error = vn_lock(dvp, LK_EXCLUSIVE);
7ab77df6
MD
1176 if (error) {
1177 vput(newvp);
c6b43e93 1178 lwkt_reltoken(&nmp->nm_token);
7ab77df6
MD
1179 return (error);
1180 }
1181 cnp->cn_flags |= CNP_PDIRUNLOCK;
984263bc
MD
1182 }
1183 } else if (NFS_CMPFH(np, fhp, fhsize)) {
597aea93 1184 vref(dvp);
984263bc
MD
1185 newvp = dvp;
1186 } else {
c9682b51 1187 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np, notvp);
984263bc 1188 if (error) {
42edf14f
MD
1189 m_freem(info.mrep);
1190 info.mrep = NULL;
c6b43e93 1191 lwkt_reltoken(&nmp->nm_token);
984263bc
MD
1192 return (error);
1193 }
fad57d0e 1194 if (!lockparent) {
a11aaa81 1195 vn_unlock(dvp);
7ab77df6
MD
1196 cnp->cn_flags |= CNP_PDIRUNLOCK;
1197 }
984263bc
MD
1198 newvp = NFSTOV(np);
1199 }
42edf14f
MD
1200 if (info.v3) {
1201 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag,
1202 NFS_LATTR_NOSHRINK));
1203 ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag,
1204 NFS_LATTR_NOSHRINK));
1205 } else {
1206 ERROROUT(nfsm_loadattr(&info, newvp, NULL));
1207 }
fad57d0e
MD
1208#if 0
1209 /* XXX MOVE TO nfs_nremove() */
2b69e610 1210 if ((cnp->cn_flags & CNP_MAKEENTRY) &&
fad57d0e
MD
1211 cnp->cn_nameiop != NAMEI_DELETE) {
1212 np->n_ctime = np->n_vattr.va_ctime.tv_sec; /* XXX */
984263bc 1213 }
fad57d0e 1214#endif
984263bc 1215 *vpp = newvp;
42edf14f
MD
1216 m_freem(info.mrep);
1217 info.mrep = NULL;
6b08710e 1218nfsmout:
984263bc
MD
1219 if (error) {
1220 if (newvp != NULLVP) {
1221 vrele(newvp);
1222 *vpp = NULLVP;
1223 }
fad57d0e
MD
1224 if ((cnp->cn_nameiop == NAMEI_CREATE ||
1225 cnp->cn_nameiop == NAMEI_RENAME) &&
1226 error == ENOENT) {
7ab77df6 1227 if (!lockparent) {
a11aaa81 1228 vn_unlock(dvp);
7ab77df6
MD
1229 cnp->cn_flags |= CNP_PDIRUNLOCK;
1230 }
984263bc
MD
1231 if (dvp->v_mount->mnt_flag & MNT_RDONLY)
1232 error = EROFS;
1233 else
1234 error = EJUSTRETURN;
1235 }
984263bc 1236 }
c6b43e93 1237 lwkt_reltoken(&nmp->nm_token);
984263bc
MD
1238 return (error);
1239}
1240
1241/*
1242 * nfs read call.
1243 * Just call nfs_bioread() to do the work.
e851b29e
CP
1244 *
1245 * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
1246 * struct ucred *a_cred)
984263bc
MD
1247 */
1248static int
e851b29e 1249nfs_read(struct vop_read_args *ap)
984263bc 1250{
40393ded 1251 struct vnode *vp = ap->a_vp;
c6b43e93
MD
1252 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1253 int error;
1254
1255 lwkt_gettoken(&nmp->nm_token);
1256 error = nfs_bioread(vp, ap->a_uio, ap->a_ioflag);
1257 lwkt_reltoken(&nmp->nm_token);
984263bc 1258
c6b43e93 1259 return error;
984263bc
MD
1260}
1261
1262/*
1263 * nfs readlink call
e851b29e
CP
1264 *
1265 * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
984263bc
MD
1266 */
1267static int
e851b29e 1268nfs_readlink(struct vop_readlink_args *ap)
984263bc 1269{
40393ded 1270 struct vnode *vp = ap->a_vp;
c6b43e93
MD
1271 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1272 int error;
984263bc
MD
1273
1274 if (vp->v_type != VLNK)
1275 return (EINVAL);
c6b43e93
MD
1276
1277 lwkt_gettoken(&nmp->nm_token);
1278 error = nfs_bioread(vp, ap->a_uio, 0);
1279 lwkt_reltoken(&nmp->nm_token);
1280
1281 return error;
984263bc
MD
1282}
1283
1284/*
1285 * Do a readlink rpc.
1286 * Called by nfs_doio() from below the buffer cache.
1287 */
1288int
cc7d050e 1289nfs_readlinkrpc_uio(struct vnode *vp, struct uio *uiop)
984263bc 1290{
984263bc 1291 int error = 0, len, attrflag;
42edf14f
MD
1292 struct nfsm_info info;
1293
1294 info.mrep = NULL;
1295 info.v3 = NFS_ISV3(vp);
984263bc
MD
1296
1297 nfsstats.rpccnt[NFSPROC_READLINK]++;
42edf14f
MD
1298 nfsm_reqhead(&info, vp, NFSPROC_READLINK, NFSX_FH(info.v3));
1299 ERROROUT(nfsm_fhtom(&info, vp));
1300 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READLINK, uiop->uio_td,
1301 nfs_vpcred(vp, ND_CHECK), &error));
1302 if (info.v3) {
1303 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag,
1304 NFS_LATTR_NOSHRINK));
1305 }
984263bc 1306 if (!error) {
42edf14f 1307 NEGATIVEOUT(len = nfsm_strsiz(&info, NFS_MAXPATHLEN));
984263bc
MD
1308 if (len == NFS_MAXPATHLEN) {
1309 struct nfsnode *np = VTONFS(vp);
1310 if (np->n_size && np->n_size < NFS_MAXPATHLEN)
1311 len = np->n_size;
1312 }
42edf14f 1313 ERROROUT(nfsm_mtouio(&info, uiop, len));
984263bc 1314 }
42edf14f
MD
1315 m_freem(info.mrep);
1316 info.mrep = NULL;
6b08710e 1317nfsmout:
984263bc
MD
1318 return (error);
1319}
1320
1321/*
28953d39 1322 * nfs synchronous read rpc using UIO
984263bc
MD
1323 */
1324int
edb90c22 1325nfs_readrpc_uio(struct vnode *vp, struct uio *uiop)
984263bc 1326{
40393ded 1327 u_int32_t *tl;
984263bc
MD
1328 struct nfsmount *nmp;
1329 int error = 0, len, retlen, tsiz, eof, attrflag;
42edf14f 1330 struct nfsm_info info;
28953d39 1331 off_t tmp_off;
42edf14f
MD
1332
1333 info.mrep = NULL;
1334 info.v3 = NFS_ISV3(vp);
984263bc
MD
1335
1336#ifndef nolint
1337 eof = 0;
1338#endif
1339 nmp = VFSTONFS(vp->v_mount);
c6b43e93 1340
984263bc 1341 tsiz = uiop->uio_resid;
28953d39
MD
1342 tmp_off = uiop->uio_offset + tsiz;
1343 if (tmp_off > nmp->nm_maxfilesize || tmp_off < uiop->uio_offset)
984263bc 1344 return (EFBIG);
28953d39 1345 tmp_off = uiop->uio_offset;
984263bc
MD
1346 while (tsiz > 0) {
1347 nfsstats.rpccnt[NFSPROC_READ]++;
1348 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
42edf14f
MD
1349 nfsm_reqhead(&info, vp, NFSPROC_READ,
1350 NFSX_FH(info.v3) + NFSX_UNSIGNED * 3);
1351 ERROROUT(nfsm_fhtom(&info, vp));
1352 tl = nfsm_build(&info, NFSX_UNSIGNED * 3);
1353 if (info.v3) {
984263bc
MD
1354 txdr_hyper(uiop->uio_offset, tl);
1355 *(tl + 2) = txdr_unsigned(len);
1356 } else {
1357 *tl++ = txdr_unsigned(uiop->uio_offset);
1358 *tl++ = txdr_unsigned(len);
1359 *tl = 0;
1360 }
42edf14f
MD
1361 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READ, uiop->uio_td,
1362 nfs_vpcred(vp, ND_READ), &error));
1363 if (info.v3) {
1364 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag,
1365 NFS_LATTR_NOSHRINK));
1366 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED));
984263bc 1367 eof = fxdr_unsigned(int, *(tl + 1));
42edf14f
MD
1368 } else {
1369 ERROROUT(nfsm_loadattr(&info, vp, NULL));
1370 }
28953d39 1371 NEGATIVEOUT(retlen = nfsm_strsiz(&info, len));
42edf14f
MD
1372 ERROROUT(nfsm_mtouio(&info, uiop, retlen));
1373 m_freem(info.mrep);
1374 info.mrep = NULL;
28953d39
MD
1375
1376 /*
1377 * Handle short-read from server (NFSv3). If EOF is not
1378 * flagged (and no error occurred), but retlen is less
1379 * then the request size, we must zero-fill the remainder.
1380 */
1381 if (retlen < len && info.v3 && eof == 0) {
1382 ERROROUT(uiomovez(len - retlen, uiop));
1383 retlen = len;
1384 }
984263bc 1385 tsiz -= retlen;
28953d39
MD
1386
1387 /*
1388 * Terminate loop on EOF or zero-length read.
1389 *
1390 * For NFSv2 a short-read indicates EOF, not zero-fill,
1391 * and also terminates the loop.
1392 */
42edf14f 1393 if (info.v3) {
28953d39 1394 if (eof || retlen == 0)
984263bc 1395 tsiz = 0;
984263bc
MD
1396 } else if (retlen < len) {
1397 tsiz = 0;
1398 }
1399 }
1400nfsmout:
1401 return (error);
1402}
1403
1404/*
1405 * nfs write call
1406 */
1407int
cc7d050e
MD
1408nfs_writerpc_uio(struct vnode *vp, struct uio *uiop,
1409 int *iomode, int *must_commit)
984263bc 1410{
40393ded 1411 u_int32_t *tl;
42edf14f 1412 int32_t backup;
984263bc
MD
1413 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1414 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
42edf14f
MD
1415 int committed = NFSV3WRITE_FILESYNC;
1416 struct nfsm_info info;
1417
1418 info.mrep = NULL;
1419 info.v3 = NFS_ISV3(vp);
984263bc
MD
1420
1421#ifndef DIAGNOSTIC
1422 if (uiop->uio_iovcnt != 1)
1423 panic("nfs: writerpc iovcnt > 1");
1424#endif
1425 *must_commit = 0;
1426 tsiz = uiop->uio_resid;
1427 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
1428 return (EFBIG);
1429 while (tsiz > 0) {
1430 nfsstats.rpccnt[NFSPROC_WRITE]++;
1431 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
42edf14f 1432 nfsm_reqhead(&info, vp, NFSPROC_WRITE,
5e6f1ca5
MD
1433 NFSX_FH(info.v3) + 5 * NFSX_UNSIGNED +
1434 nfsm_rndup(len));
42edf14f
MD
1435 ERROROUT(nfsm_fhtom(&info, vp));
1436 if (info.v3) {
1437 tl = nfsm_build(&info, 5 * NFSX_UNSIGNED);
984263bc
MD
1438 txdr_hyper(uiop->uio_offset, tl);
1439 tl += 2;
1440 *tl++ = txdr_unsigned(len);
1441 *tl++ = txdr_unsigned(*iomode);
1442 *tl = txdr_unsigned(len);
1443 } else {
40393ded 1444 u_int32_t x;
984263bc 1445
42edf14f 1446 tl = nfsm_build(&info, 4 * NFSX_UNSIGNED);
984263bc
MD
1447 /* Set both "begin" and "current" to non-garbage. */
1448 x = txdr_unsigned((u_int32_t)uiop->uio_offset);
1449 *tl++ = x; /* "begin offset" */
1450 *tl++ = x; /* "current offset" */
1451 x = txdr_unsigned(len);
1452 *tl++ = x; /* total to this offset */
1453 *tl = x; /* size of this write */
1454 }
42edf14f
MD
1455 ERROROUT(nfsm_uiotom(&info, uiop, len));
1456 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_WRITE, uiop->uio_td,
1457 nfs_vpcred(vp, ND_WRITE), &error));
1458 if (info.v3) {
5a9187cb
MD
1459 /*
1460 * The write RPC returns a before and after mtime. The
1461 * nfsm_wcc_data() macro checks the before n_mtime
1462 * against the before time and stores the after time
1463 * in the nfsnode's cached vattr and n_mtime field.
1464 * The NRMODIFIED bit will be set if the before
1465 * time did not match the original mtime.
1466 */
984263bc 1467 wccflag = NFSV3_WCCCHK;
42edf14f
MD
1468 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag));
1469 if (error == 0) {
1470 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED + NFSX_V3WRITEVERF));
984263bc
MD
1471 rlen = fxdr_unsigned(int, *tl++);
1472 if (rlen == 0) {
1473 error = NFSERR_IO;
42edf14f
MD
1474 m_freem(info.mrep);
1475 info.mrep = NULL;
984263bc
MD
1476 break;
1477 } else if (rlen < len) {
1478 backup = len - rlen;
656849c6 1479 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base - backup;
984263bc
MD
1480 uiop->uio_iov->iov_len += backup;
1481 uiop->uio_offset -= backup;
1482 uiop->uio_resid += backup;
1483 len = rlen;
1484 }
1485 commit = fxdr_unsigned(int, *tl++);
1486
1487 /*
1488 * Return the lowest committment level
1489 * obtained by any of the RPCs.
1490 */
1491 if (committed == NFSV3WRITE_FILESYNC)
1492 committed = commit;
1493 else if (committed == NFSV3WRITE_DATASYNC &&
1494 commit == NFSV3WRITE_UNSTABLE)
1495 committed = commit;
1496 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){
1497 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1498 NFSX_V3WRITEVERF);
1499 nmp->nm_state |= NFSSTA_HASWRITEVERF;
1500 } else if (bcmp((caddr_t)tl,
1501 (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1502 *must_commit = 1;
1503 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1504 NFSX_V3WRITEVERF);
1505 }
1506 }
5a9187cb 1507 } else {
42edf14f 1508 ERROROUT(nfsm_loadattr(&info, vp, NULL));
5a9187cb 1509 }
42edf14f
MD
1510 m_freem(info.mrep);
1511 info.mrep = NULL;
984263bc
MD
1512 if (error)
1513 break;
1514 tsiz -= len;
1515 }
1516nfsmout:
1517 if (vp->v_mount->mnt_flag & MNT_ASYNC)
1518 committed = NFSV3WRITE_FILESYNC;
1519 *iomode = committed;
1520 if (error)
1521 uiop->uio_resid = tsiz;
1522 return (error);
1523}
1524
1525/*
1526 * nfs mknod rpc
1527 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1528 * mode set to specify the file type and the size field for rdev.
1529 */
1530static int
e851b29e
CP
1531nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
1532 struct vattr *vap)
984263bc 1533{
40393ded
RG
1534 struct nfsv2_sattr *sp;
1535 u_int32_t *tl;
60233e58
SW
1536 struct vnode *newvp = NULL;
1537 struct nfsnode *np = NULL;
984263bc 1538 struct vattr vattr;
984263bc 1539 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
0e9b9130 1540 int rmajor, rminor;
42edf14f
MD
1541 struct nfsm_info info;
1542
1543 info.mrep = NULL;
1544 info.v3 = NFS_ISV3(dvp);
984263bc 1545
0e9b9130
MD
1546 if (vap->va_type == VCHR || vap->va_type == VBLK) {
1547 rmajor = txdr_unsigned(vap->va_rmajor);
1548 rminor = txdr_unsigned(vap->va_rminor);
1549 } else if (vap->va_type == VFIFO || vap->va_type == VSOCK) {
1550 rmajor = nfs_xdrneg1;
1551 rminor = nfs_xdrneg1;
1552 } else {
984263bc
MD
1553 return (EOPNOTSUPP);
1554 }
87de5057 1555 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
984263bc
MD
1556 return (error);
1557 }
1558 nfsstats.rpccnt[NFSPROC_MKNOD]++;
42edf14f
MD
1559 nfsm_reqhead(&info, dvp, NFSPROC_MKNOD,
1560 NFSX_FH(info.v3) + 4 * NFSX_UNSIGNED +
1561 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(info.v3));
1562 ERROROUT(nfsm_fhtom(&info, dvp));
1563 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen,
1564 NFS_MAXNAMLEN));
1565 if (info.v3) {
1566 tl = nfsm_build(&info, NFSX_UNSIGNED);
984263bc 1567 *tl++ = vtonfsv3_type(vap->va_type);
42edf14f 1568 nfsm_v3attrbuild(&info, vap, FALSE);
984263bc 1569 if (vap->va_type == VCHR || vap->va_type == VBLK) {
42edf14f 1570 tl = nfsm_build(&info, 2 * NFSX_UNSIGNED);
0e9b9130
MD
1571 *tl++ = txdr_unsigned(vap->va_rmajor);
1572 *tl = txdr_unsigned(vap->va_rminor);
984263bc
MD
1573 }
1574 } else {
42edf14f 1575 sp = nfsm_build(&info, NFSX_V2SATTR);
984263bc
MD
1576 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1577 sp->sa_uid = nfs_xdrneg1;
1578 sp->sa_gid = nfs_xdrneg1;
0e9b9130 1579 sp->sa_size = makeudev(rmajor, rminor);
984263bc
MD
1580 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1581 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1582 }
42edf14f
MD
1583 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_MKNOD, cnp->cn_td,
1584 cnp->cn_cred, &error));
984263bc 1585 if (!error) {
42edf14f 1586 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp));
984263bc
MD
1587 if (!gotvp) {
1588 if (newvp) {
1589 vput(newvp);
60233e58 1590 newvp = NULL;
984263bc
MD
1591 }
1592 error = nfs_lookitup(dvp, cnp->cn_nameptr,
dadab5e9 1593 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
984263bc
MD
1594 if (!error)
1595 newvp = NFSTOV(np);
1596 }
1597 }
42edf14f
MD
1598 if (info.v3) {
1599 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag));
1600 }
1601 m_freem(info.mrep);
1602 info.mrep = NULL;
6b08710e 1603nfsmout:
984263bc
MD
1604 if (error) {
1605 if (newvp)
1606 vput(newvp);
1607 } else {
984263bc
MD
1608 *vpp = newvp;
1609 }
5a9187cb 1610 VTONFS(dvp)->n_flag |= NLMODIFIED;
984263bc
MD
1611 if (!wccflag)
1612 VTONFS(dvp)->n_attrstamp = 0;
1613 return (error);
1614}
1615
1616/*
1617 * nfs mknod vop
1618 * just call nfs_mknodrpc() to do the work.
e851b29e
CP
1619 *
1620 * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
1621 * struct componentname *a_cnp, struct vattr *a_vap)
984263bc
MD
1622 */
1623/* ARGSUSED */
1624static int
e62afb5f 1625nfs_mknod(struct vop_old_mknod_args *ap)
984263bc 1626{
c6b43e93
MD
1627 struct nfsmount *nmp = VFSTONFS(ap->a_dvp->v_mount);
1628 int error;
1629
1630 lwkt_gettoken(&nmp->nm_token);
1631 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
1632 lwkt_reltoken(&nmp->nm_token);
1633
1634 return error;
984263bc
MD
1635}
1636
1637static u_long create_verf;
1638/*
1639 * nfs file create call
e851b29e
CP
1640 *
1641 * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
1642 * struct componentname *a_cnp, struct vattr *a_vap)
984263bc
MD
1643 */
1644static int
e62afb5f 1645nfs_create(struct vop_old_create_args *ap)
984263bc 1646{
40393ded
RG
1647 struct vnode *dvp = ap->a_dvp;
1648 struct vattr *vap = ap->a_vap;
c6b43e93 1649 struct nfsmount *nmp = VFSTONFS(dvp->v_mount);
40393ded
RG
1650 struct componentname *cnp = ap->a_cnp;
1651 struct nfsv2_sattr *sp;
1652 u_int32_t *tl;
60233e58
SW
1653 struct nfsnode *np = NULL;
1654 struct vnode *newvp = NULL;
984263bc 1655 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
984263bc 1656 struct vattr vattr;
42edf14f
MD
1657 struct nfsm_info info;
1658
1659 info.mrep = NULL;
1660 info.v3 = NFS_ISV3(dvp);
c6b43e93 1661 lwkt_gettoken(&nmp->nm_token);
984263bc
MD
1662
1663 /*
1664 * Oops, not for me..
1665 */
c6b43e93
MD
1666 if (vap->va_type == VSOCK) {
1667 error = nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap);
1668 lwkt_reltoken(&nmp->nm_token);
1669 return error;
1670 }
984263bc 1671
87de5057 1672 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
c6b43e93 1673 lwkt_reltoken(&nmp->nm_token);
984263bc
MD
1674 return (error);
1675 }
1676 if (vap->va_vaflags & VA_EXCLUSIVE)
1677 fmode |= O_EXCL;
1678again:
1679 nfsstats.rpccnt[NFSPROC_CREATE]++;
42edf14f
MD
1680 nfsm_reqhead(&info, dvp, NFSPROC_CREATE,
1681 NFSX_FH(info.v3) + 2 * NFSX_UNSIGNED +
1682 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(info.v3));
1683 ERROROUT(nfsm_fhtom(&info, dvp));
1684 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen,
1685 NFS_MAXNAMLEN));
1686 if (info.v3) {
1687 tl = nfsm_build(&info, NFSX_UNSIGNED);
984263bc
MD
1688 if (fmode & O_EXCL) {
1689 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
42edf14f 1690 tl = nfsm_build(&info, NFSX_V3CREATEVERF);
984263bc 1691#ifdef INET
1b562c24
SZ
1692 if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid]))
1693 *tl++ = IA_SIN(TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia)->sin_addr.s_addr;
984263bc
MD
1694 else
1695#endif
1696 *tl++ = create_verf;
1697 *tl = ++create_verf;
1698 } else {
1699 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
42edf14f 1700 nfsm_v3attrbuild(&info, vap, FALSE);
984263bc
MD
1701 }
1702 } else {
42edf14f 1703 sp = nfsm_build(&info, NFSX_V2SATTR);
984263bc
MD
1704 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1705 sp->sa_uid = nfs_xdrneg1;
1706 sp->sa_gid = nfs_xdrneg1;
1707 sp->sa_size = 0;
1708 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1709 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1710 }
42edf14f
MD
1711 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_CREATE, cnp->cn_td,
1712 cnp->cn_cred, &error));
1713 if (error == 0) {
1714 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp));
984263bc
MD
1715 if (!gotvp) {
1716 if (newvp) {
1717 vput(newvp);
60233e58 1718 newvp = NULL;
984263bc
MD
1719 }
1720 error = nfs_lookitup(dvp, cnp->cn_nameptr,
dadab5e9 1721 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np);
984263bc
MD
1722 if (!error)
1723 newvp = NFSTOV(np);
1724 }
1725 }
42edf14f 1726 if (info.v3) {
d64fd6d3
MD
1727 if (error == 0)
1728 error = nfsm_wcc_data(&info, dvp, &wccflag);
1729 else
1730 (void)nfsm_wcc_data(&info, dvp, &wccflag);
42edf14f
MD
1731 }
1732 m_freem(info.mrep);
1733 info.mrep = NULL;
6b08710e 1734nfsmout:
984263bc 1735 if (error) {
42edf14f 1736 if (info.v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
c5c4cc5d 1737 KKASSERT(newvp == NULL);
984263bc
MD
1738 fmode &= ~O_EXCL;
1739 goto again;
1740 }
42edf14f 1741 } else if (info.v3 && (fmode & O_EXCL)) {
984263bc
MD
1742 /*
1743 * We are normally called with only a partially initialized
1744 * VAP. Since the NFSv3 spec says that server may use the
1745 * file attributes to store the verifier, the spec requires
1746 * us to do a SETATTR RPC. FreeBSD servers store the verifier
1747 * in atime, but we can't really assume that all servers will
1748 * so we ensure that our SETATTR sets both atime and mtime.
1749 */
1750 if (vap->va_mtime.tv_sec == VNOVAL)
1751 vfs_timestamp(&vap->va_mtime);
1752 if (vap->va_atime.tv_sec == VNOVAL)
1753 vap->va_atime = vap->va_mtime;
dadab5e9 1754 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td);
984263bc 1755 }
c5c4cc5d 1756 if (error == 0) {
c1cf1e59
MD
1757 /*
1758 * The new np may have enough info for access
1759 * checks, make sure rucred and wucred are
1760 * initialized for read and write rpc's.
1761 */
1762 np = VTONFS(newvp);
1763 if (np->n_rucred == NULL)
1764 np->n_rucred = crhold(cnp->cn_cred);
1765 if (np->n_wucred == NULL)
1766 np->n_wucred = crhold(cnp->cn_cred);
984263bc 1767 *ap->a_vpp = newvp;
c5c4cc5d
MD
1768 } else if (newvp) {
1769 vput(newvp);
984263bc 1770 }
5a9187cb 1771 VTONFS(dvp)->n_flag |= NLMODIFIED;
984263bc
MD
1772 if (!wccflag)
1773 VTONFS(dvp)->n_attrstamp = 0;
c6b43e93 1774 lwkt_reltoken(&nmp->nm_token);
984263bc
MD
1775 return (error);
1776}
1777
1778/*
1779 * nfs file remove call
1780 * To try and make nfs semantics closer to ufs semantics, a file that has
1781 * other processes using the vnode is renamed instead of removed and then
1782 * removed later on the last close.
3c37c940 1783 * - If v_sysref.refcnt > 1
984263bc
MD
1784 * If a rename is not already in the works
1785 * call nfs_sillyrename() to set it up
1786 * else
1787 * do the remove rpc
e851b29e 1788 *
31bd717a
MD
1789 * nfs_remove(struct vnode *a_dvp, struct vnode *a_vp,
1790 * struct componentname *a_cnp)
984263bc
MD
1791 */
1792static int
e62afb5f 1793nfs_remove(struct vop_old_remove_args *ap)
984263bc 1794{
40393ded
RG
1795 struct vnode *vp = ap->a_vp;
1796 struct vnode *dvp = ap->a_dvp;
c6b43e93 1797 struct nfsmount *nmp = VFSTONFS(dvp->v_mount);
40393ded
RG
1798 struct componentname *cnp = ap->a_cnp;
1799 struct nfsnode *np = VTONFS(vp);
984263bc
MD
1800 int error = 0;
1801 struct vattr vattr;
1802
c6b43e93 1803 lwkt_gettoken(&nmp->nm_token);
984263bc 1804#ifndef DIAGNOSTIC
3c37c940
MD
1805 if (vp->v_sysref.refcnt < 1)
1806 panic("nfs_remove: bad v_sysref.refcnt");
984263bc 1807#endif
c6b43e93 1808 if (vp->v_type == VDIR) {
984263bc 1809 error = EPERM;
c6b43e93
MD
1810 } else if (vp->v_sysref.refcnt == 1 || (np->n_sillyrename &&
1811 VOP_GETATTR(vp, &vattr) == 0 && vattr.va_nlink > 1)) {
984263bc
MD
1812 /*
1813 * throw away biocache buffers, mainly to avoid
1814 * unnecessary delayed writes later.
1815 */
87de5057 1816 error = nfs_vinvalbuf(vp, 0, 1);
984263bc
MD
1817 /* Do the rpc */
1818 if (error != EINTR)
1819 error = nfs_removerpc(dvp, cnp->cn_nameptr,
dadab5e9 1820 cnp->cn_namelen, cnp->cn_cred, cnp->cn_td);
984263bc
MD
1821 /*
1822 * Kludge City: If the first reply to the remove rpc is lost..
1823 * the reply to the retransmitted request will be ENOENT
1824 * since the file was in fact removed
1825 * Therefore, we cheat and return success.
1826 */
1827 if (error == ENOENT)
1828 error = 0;
fad57d0e 1829 } else if (!np->n_sillyrename) {
984263bc 1830 error = nfs_sillyrename(dvp, vp, cnp);
fad57d0e 1831 }
984263bc 1832 np->n_attrstamp = 0;
c6b43e93
MD
1833 lwkt_reltoken(&nmp->nm_token);
1834
984263bc
MD
1835 return (error);
1836}
1837
1838/*
1839 * nfs file remove rpc called from nfs_inactive
1840 */
1841int
dadab5e9 1842nfs_removeit(struct sillyrename *sp)
984263bc 1843{
dadab5e9
MD
1844 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen,
1845 sp->s_cred, NULL));
984263bc
MD
1846}
1847
1848/*
1849 * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1850 */
1851static int
e851b29e
CP
1852nfs_removerpc(struct vnode *dvp, const char *name, int namelen,
1853 struct ucred *cred, struct thread *td)
984263bc 1854{
984263bc 1855 int error = 0, wccflag = NFSV3_WCCRATTR;
42edf14f
MD
1856 struct nfsm_info info;
1857
1858 info.mrep = NULL;
1859 info.v3 = NFS_ISV3(dvp);
984263bc
MD
1860
1861 nfsstats.rpccnt[NFSPROC_REMOVE]++;
42edf14f
MD
1862 nfsm_reqhead(&info, dvp, NFSPROC_REMOVE,
1863 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1864 ERROROUT(nfsm_fhtom(&info, dvp));
1865 ERROROUT(nfsm_strtom(&info, name, namelen, NFS_MAXNAMLEN));
1866 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_REMOVE, td, cred, &error));
1867 if (info.v3) {
1868 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag));
1869 }
1870 m_freem(info.mrep);
1871 info.mrep = NULL;
6b08710e 1872nfsmout:
5a9187cb 1873 VTONFS(dvp)->n_flag |= NLMODIFIED;
984263bc
MD
1874 if (!wccflag)
1875 VTONFS(dvp)->n_attrstamp = 0;
1876 return (error);
1877}
1878
1879/*
1880 * nfs file rename call
e851b29e
CP
1881 *
1882 * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
1883 * struct componentname *a_fcnp, struct vnode *a_tdvp,
1884 * struct vnode *a_tvp, struct componentname *a_tcnp)
984263bc
MD
1885 */
1886static int
e62afb5f 1887nfs_rename(struct vop_old_rename_args *ap)
984263bc 1888{
40393ded
RG
1889 struct vnode *fvp = ap->a_fvp;
1890 struct vnode *tvp = ap->a_tvp;
1891 struct vnode *fdvp = ap->a_fdvp;
1892 struct vnode *tdvp = ap->a_tdvp;
1893 struct componentname *tcnp = ap->a_tcnp;
1894 struct componentname *fcnp = ap->a_fcnp;
c6b43e93 1895 struct nfsmount *nmp = VFSTONFS(fdvp->v_mount);
984263bc
MD
1896 int error;
1897
c6b43e93
MD
1898 lwkt_gettoken(&nmp->nm_token);
1899
984263bc
MD
1900 /* Check for cross-device rename */
1901 if ((fvp->v_mount != tdvp->v_mount) ||
1902 (tvp && (fvp->v_mount != tvp->v_mount))) {
1903 error = EXDEV;
1904 goto out;
1905 }
1906
1907 /*
bb7bf7b2
MD
1908 * We shouldn't have to flush fvp on rename for most server-side
1909 * filesystems as the file handle should not change. Unfortunately
1910 * the inode for some filesystems (msdosfs) might be tied to the
1911 * file name or directory position so to be completely safe
1912 * vfs.nfs.flush_on_rename is set by default. Clear to improve
1913 * performance.
a482a28a
MD
1914 *
1915 * We must flush tvp on rename because it might become stale on the
1916 * server after the rename.
984263bc 1917 */
a482a28a 1918 if (nfs_flush_on_rename)
52174f71 1919 VOP_FSYNC(fvp, MNT_WAIT, 0);
984263bc 1920 if (tvp)
52174f71 1921 VOP_FSYNC(tvp, MNT_WAIT, 0);
984263bc
MD
1922
1923 /*
1924 * If the tvp exists and is in use, sillyrename it before doing the
1925 * rename of the new file over it.
fad57d0e 1926 *
984263bc 1927 * XXX Can't sillyrename a directory.
5fd012e0 1928 *
fad57d0e
MD
1929 * We do not attempt to do any namecache purges in this old API
1930 * routine. The new API compat functions have access to the actual
1931 * namecache structures and will do it for us.
984263bc 1932 */
3c37c940 1933 if (tvp && tvp->v_sysref.refcnt > 1 && !VTONFS(tvp)->n_sillyrename &&
984263bc
MD
1934 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1935 vput(tvp);
1936 tvp = NULL;
5fd012e0 1937 } else if (tvp) {
fad57d0e 1938 ;
984263bc
MD
1939 }
1940
1941 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1942 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
dadab5e9 1943 tcnp->cn_td);
984263bc 1944
984263bc 1945out:
c6b43e93 1946 lwkt_reltoken(&nmp->nm_token);
984263bc
MD
1947 if (tdvp == tvp)
1948 vrele(tdvp);
1949 else
1950 vput(tdvp);
1951 if (tvp)
1952 vput(tvp);
1953 vrele(fdvp);
1954 vrele(fvp);
1955 /*
1956 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1957 */
1958 if (error == ENOENT)
1959 error = 0;
1960 return (error);
1961}
1962
1963/*
1964 * nfs file rename rpc called from nfs_remove() above
1965 */
1966static int
e851b29e
CP
1967nfs_renameit(struct vnode *sdvp, struct componentname *scnp,
1968 struct sillyrename *sp)
984263bc
MD
1969{
1970 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
dadab5e9 1971 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td));
984263bc
MD
1972}
1973
1974/*
1975 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1976 */
1977static int
e851b29e
CP
1978nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen,
1979 struct vnode *tdvp, const char *tnameptr, int tnamelen,
1980 struct ucred *cred, struct thread *td)
984263bc 1981{
984263bc 1982 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
42edf14f
MD
1983 struct nfsm_info info;
1984
1985 info.mrep = NULL;
1986 info.v3 = NFS_ISV3(fdvp);
984263bc
MD
1987
1988 nfsstats.rpccnt[NFSPROC_RENAME]++;
42edf14f
MD
1989 nfsm_reqhead(&info, fdvp, NFSPROC_RENAME,
1990 (NFSX_FH(info.v3) + NFSX_UNSIGNED)*2 +
1991 nfsm_rndup(fnamelen) + nfsm_rndup(tnamelen));
1992 ERROROUT(nfsm_fhtom(&info, fdvp));
1993 ERROROUT(nfsm_strtom(&info, fnameptr, fnamelen, NFS_MAXNAMLEN));
1994 ERROROUT(nfsm_fhtom(&info, tdvp));
1995 ERROROUT(nfsm_strtom(&info, tnameptr, tnamelen, NFS_MAXNAMLEN));
1996 NEGKEEPOUT(nfsm_request(&info, fdvp, NFSPROC_RENAME, td, cred, &error));
1997 if (info.v3) {
1998 ERROROUT(nfsm_wcc_data(&info, fdvp, &fwccflag));
1999 ERROROUT(nfsm_wcc_data(&info, tdvp, &twccflag));
2000 }
2001 m_freem(info.mrep);
2002 info.mrep = NULL;
6b08710e 2003nfsmout:
5a9187cb
MD
2004 VTONFS(fdvp)->n_flag |= NLMODIFIED;
2005 VTONFS(tdvp)->n_flag |= NLMODIFIED;
984263bc
MD
2006 if (!fwccflag)
2007 VTONFS(fdvp)->n_attrstamp = 0;
2008 if (!twccflag)
2009 VTONFS(tdvp)->n_attrstamp = 0;
2010 return (error);
2011}
2012
2013/*
2014 * nfs hard link create call
e851b29e
CP
2015 *
2016 * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp,
2017 * struct componentname *a_cnp)
984263bc
MD
2018 */
2019static int
e62afb5f 2020nfs_link(struct vop_old_link_args *ap)
984263bc 2021{
40393ded
RG
2022 struct vnode *vp = ap->a_vp;
2023 struct vnode *tdvp = ap->a_tdvp;
c6b43e93 2024 struct nfsmount *nmp = VFSTONFS(tdvp->v_mount);
40393ded 2025 struct componentname *cnp = ap->a_cnp;
984263bc 2026 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
42edf14f 2027 struct nfsm_info info;
984263bc
MD
2028
2029 if (vp->v_mount != tdvp->v_mount) {
2030 return (EXDEV);
2031 }
c6b43e93 2032 lwkt_gettoken(&nmp->nm_token);
984263bc
MD
2033
2034 /*
bb7bf7b2
MD
2035 * The attribute cache may get out of sync with the server on link.
2036 * Pushing writes to the server before handle was inherited from
2037 * long long ago and it is unclear if we still need to do this.
2038 * Defaults to off.
984263bc 2039 */
bb7bf7b2 2040 if (nfs_flush_on_hlink)
52174f71 2041 VOP_FSYNC(vp, MNT_WAIT, 0);
984263bc 2042
42edf14f
MD
2043 info.mrep = NULL;
2044 info.v3 = NFS_ISV3(vp);
2045
984263bc 2046 nfsstats.rpccnt[NFSPROC_LINK]++;
42edf14f
MD
2047 nfsm_reqhead(&info, vp, NFSPROC_LINK,
2048 NFSX_FH(info.v3) * 2 + NFSX_UNSIGNED +
2049 nfsm_rndup(cnp->cn_namelen));
2050 ERROROUT(nfsm_fhtom(&info, vp));
2051 ERROROUT(nfsm_fhtom(&info, tdvp));
2052 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen,
2053 NFS_MAXNAMLEN));
2054 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_LINK, cnp->cn_td,
2055 cnp->cn_cred, &error));
2056 if (info.v3) {
2057 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag,
2058 NFS_LATTR_NOSHRINK));
2059 ERROROUT(nfsm_wcc_data(&info, tdvp, &wccflag));
2060 }
2061 m_freem(info.mrep);
2062 info.mrep = NULL;
6b08710e 2063nfsmout:
5a9187cb 2064 VTONFS(tdvp)->n_flag |= NLMODIFIED;
984263bc
MD
2065 if (!attrflag)
2066 VTONFS(vp)->n_attrstamp = 0;
2067 if (!wccflag)
2068 VTONFS(tdvp)->n_attrstamp = 0;
2069 /*
2070 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
2071 */
2072 if (error == EEXIST)
2073 error = 0;
c6b43e93 2074 lwkt_reltoken(&nmp->nm_token);
984263bc
MD
2075 return (error);
2076}
2077
2078/*
2079 * nfs symbolic link create call
e851b29e
CP
2080 *
2081 * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
2082 * struct componentname *a_cnp, struct vattr *a_vap,
2083 * char *a_target)
984263bc
MD
2084 */
2085static int
e62afb5f 2086nfs_symlink(struct vop_old_symlink_args *ap)
984263bc 2087{
40393ded
RG
2088 struct vnode *dvp = ap->a_dvp;
2089 struct vattr *vap = ap->a_vap;
c6b43e93 2090 struct nfsmount *nmp = VFSTONFS(dvp->v_mount);
40393ded
RG
2091 struct componentname *cnp = ap->a_cnp;
2092 struct nfsv2_sattr *sp;
984263bc 2093 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
60233e58 2094 struct vnode *newvp = NULL;
42edf14f
MD
2095 struct nfsm_info info;
2096
2097 info.mrep = NULL;
2098 info.v3 = NFS_ISV3(dvp);
c6b43e93 2099 lwkt_gettoken(&nmp->nm_token);
984263bc
MD
2100
2101 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
2102 slen = strlen(ap->a_target);
42edf14f
MD
2103 nfsm_reqhead(&info, dvp, NFSPROC_SYMLINK,
2104 NFSX_FH(info.v3) + 2*NFSX_UNSIGNED +
2105 nfsm_rndup(cnp->cn_namelen) +
2106 nfsm_rndup(slen) + NFSX_SATTR(info.v3));
2107 ERROROUT(nfsm_fhtom(&info, dvp));
2108 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen,
2109 NFS_MAXNAMLEN));
2110 if (info.v3) {
2111 nfsm_v3attrbuild(&info, vap, FALSE);
2112 }
2113 ERROROUT(nfsm_strtom(&info, ap->a_target, slen, NFS_MAXPATHLEN));
2114 if (info.v3 == 0) {
2115 sp = nfsm_build(&info, NFSX_V2SATTR);
984263bc
MD
2116 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
2117 sp->sa_uid = nfs_xdrneg1;
2118 sp->sa_gid = nfs_xdrneg1;
2119 sp->sa_size = nfs_xdrneg1;
2120 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
2121 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
2122 }
2123
2124 /*
2125 * Issue the NFS request and get the rpc response.
2126 *
2127 * Only NFSv3 responses returning an error of 0 actually return
2128 * a file handle that can be converted into newvp without having
2129 * to do an extra lookup rpc.
2130 */
42edf14f
MD
2131 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_SYMLINK, cnp->cn_td,
2132 cnp->cn_cred, &error));
2133 if (info.v3) {
2134 if (error == 0) {
2135 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp));
2136 }
2137 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag));
984263bc
MD
2138 }
2139
2140 /*
2141 * out code jumps -> here, mrep is also freed.
2142 */
2143
42edf14f
MD
2144 m_freem(info.mrep);
2145 info.mrep = NULL;
6b08710e 2146nfsmout:
984263bc
MD
2147
2148 /*
2149 * If we get an EEXIST error, silently convert it to no-error
2150 * in case of an NFS retry.
2151 */
2152 if (error == EEXIST)
2153 error = 0;
2154
2155 /*
2156 * If we do not have (or no longer have) an error, and we could
2157 * not extract the newvp from the response due to the request being
2158 * NFSv2 or the error being EEXIST. We have to do a lookup in order
2159 * to obtain a newvp to return.
2160 */
2161 if (error == 0 && newvp == NULL) {
2162 struct nfsnode *np = NULL;
2163
2164 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
c6b43e93 2165 cnp->cn_cred, cnp->cn_td, &np);
984263bc
MD
2166 if (!error)
2167 newvp = NFSTOV(np);
2168 }
2169 if (error) {
2170 if (newvp)
2171 vput(newvp);
2172 } else {
2173 *ap->a_vpp = newvp;
2174 }
5a9187cb 2175 VTONFS(dvp)->n_flag |= NLMODIFIED;
984263bc
MD
2176 if (!wccflag)
2177 VTONFS(dvp)->n_attrstamp = 0;
c6b43e93
MD
2178 lwkt_reltoken(&nmp->nm_token);
2179
984263bc
MD
2180 return (error);
2181}
2182
2183/*
2184 * nfs make dir call
e851b29e
CP
2185 *
2186 * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
2187 * struct componentname *a_cnp, struct vattr *a_vap)
984263bc
MD
2188 */
2189static int
e62afb5f 2190nfs_mkdir(struct vop_old_mkdir_args *ap)
984263bc 2191{
40393ded
RG
2192 struct vnode *dvp = ap->a_dvp;
2193 struct vattr *vap = ap->a_vap;
c6b43e93 2194 struct nfsmount *nmp = VFSTONFS(dvp->v_mount);
40393ded
RG
2195 struct componentname *cnp = ap->a_cnp;
2196 struct nfsv2_sattr *sp;
60233e58
SW
2197 struct nfsnode *np = NULL;
2198 struct vnode *newvp = NULL;
42edf14f 2199 struct vattr vattr;
984263bc
MD
2200 int error = 0, wccflag = NFSV3_WCCRATTR;
2201 int gotvp = 0;
42edf14f
MD
2202 int len;
2203 struct nfsm_info info;
2204
2205 info.mrep = NULL;
2206 info.v3 = NFS_ISV3(dvp);
c6b43e93 2207 lwkt_gettoken(&nmp->nm_token);
984263bc 2208
87de5057 2209 if ((error = VOP_GETATTR(dvp, &vattr)) != 0) {
c6b43e93 2210 lwkt_reltoken(&nmp->nm_token);
984263bc
MD
2211 return (error);
2212 }
2213 len = cnp->cn_namelen;
2214 nfsstats.rpccnt[NFSPROC_MKDIR]++;
42edf14f
MD
2215 nfsm_reqhead(&info, dvp, NFSPROC_MKDIR,
2216 NFSX_FH(info.v3) + NFSX_UNSIGNED +
2217 nfsm_rndup(len) + NFSX_SATTR(info.v3));
2218 ERROROUT(nfsm_fhtom(&info, dvp));
2219 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, len, NFS_MAXNAMLEN));
2220 if (info.v3) {
2221 nfsm_v3attrbuild(&info, vap, FALSE);
984263bc 2222 } else {
42edf14f 2223 sp = nfsm_build(&info, NFSX_V2SATTR);
984263bc
MD
2224 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
2225 sp->sa_uid = nfs_xdrneg1;
2226 sp->sa_gid = nfs_xdrneg1;
2227 sp->sa_size = nfs_xdrneg1;
2228 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
2229 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
2230 }
42edf14f
MD
2231 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_MKDIR, cnp->cn_td,
2232 cnp->cn_cred, &error));
2233 if (error == 0) {
2234 ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp));
2235 }
2236 if (info.v3) {
2237 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag));
2238 }
2239 m_freem(info.mrep);
2240 info.mrep = NULL;
6b08710e 2241nfsmout:
5a9187cb 2242 VTONFS(dvp)->n_flag |= NLMODIFIED;
984263bc
MD
2243 if (!wccflag)
2244 VTONFS(dvp)->n_attrstamp = 0;
2245 /*
2246 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
2247 * if we can succeed in looking up the directory.
2248 */
2249 if (error == EEXIST || (!error && !gotvp)) {
2250 if (newvp) {
2251 vrele(newvp);
60233e58 2252 newvp = NULL;
984263bc
MD
2253 }
2254 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
dadab5e9 2255 cnp->cn_td, &np);
984263bc
MD
2256 if (!error) {
2257 newvp = NFSTOV(np);
2258 if (newvp->v_type != VDIR)
2259 error = EEXIST;
2260 }
2261 }
2262 if (error) {
2263 if (newvp)
2264 vrele(newvp);
c6b43e93 2265 } else {
984263bc 2266 *ap->a_vpp = newvp;
c6b43e93
MD
2267 }
2268 lwkt_reltoken(&nmp->nm_token);
984263bc
MD
2269 return (error);
2270}
2271
2272/*
2273 * nfs remove directory call
e851b29e
CP
2274 *
2275 * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
2276 * struct componentname *a_cnp)
984263bc
MD
2277 */
2278static int
e62afb5f 2279nfs_rmdir(struct vop_old_rmdir_args *ap)
984263bc 2280{
40393ded
RG
2281 struct vnode *vp = ap->a_vp;
2282 struct vnode *dvp = ap->a_dvp;
c6b43e93 2283 struct nfsmount *nmp = VFSTONFS(dvp->v_mount);
40393ded 2284 struct componentname *cnp = ap->a_cnp;
984263bc 2285 int error = 0, wccflag = NFSV3_WCCRATTR;
42edf14f
MD
2286 struct nfsm_info info;
2287
2288 info.mrep = NULL;
2289 info.v3 = NFS_ISV3(dvp);
984263bc
MD
2290
2291 if (dvp == vp)
2292 return (EINVAL);
c6b43e93
MD
2293
2294 lwkt_gettoken(&nmp->nm_token);
2295
984263bc 2296 nfsstats.rpccnt[NFSPROC_RMDIR]++;
42edf14f
MD
2297 nfsm_reqhead(&info, dvp, NFSPROC_RMDIR,
2298 NFSX_FH(info.v3) + NFSX_UNSIGNED +
2299 nfsm_rndup(cnp->cn_namelen));
2300 ERROROUT(nfsm_fhtom(&info, dvp));
2301 ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen,
2302 NFS_MAXNAMLEN));
2303 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_RMDIR, cnp->cn_td,
2304 cnp->cn_cred, &error));
2305 if (info.v3) {
2306 ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag));
2307 }
2308 m_freem(info.mrep);
2309 info.mrep = NULL;
6b08710e 2310nfsmout:
5a9187cb 2311 VTONFS(dvp)->n_flag |= NLMODIFIED;
984263bc
MD
2312 if (!wccflag)
2313 VTONFS(dvp)->n_attrstamp = 0;
984263bc
MD
2314 /*
2315 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2316 */
2317 if (error == ENOENT)
2318 error = 0;
c6b43e93
MD
2319 lwkt_reltoken(&nmp->nm_token);
2320
984263bc
MD
2321 return (error);
2322}
2323
2324/*
2325 * nfs readdir call
e851b29e
CP
2326 *
2327 * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred)
984263bc
MD
2328 */
2329static int
e851b29e 2330nfs_readdir(struct vop_readdir_args *ap)
984263bc 2331{
40393ded
RG
2332 struct vnode *vp = ap->a_vp;
2333 struct nfsnode *np = VTONFS(vp);
c6b43e93 2334 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
40393ded 2335 struct uio *uio = ap->a_uio;
984263bc
MD
2336 int tresid, error;
2337 struct vattr vattr;
2338
2339 if (vp->v_type != VDIR)
2340 return (EPERM);
5a9187cb 2341
885ecb13
MD
2342 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0)
2343 return (error);
2344
c6b43e93
MD
2345 lwkt_gettoken(&nmp->nm_token);
2346
984263bc 2347 /*
5a9187cb
MD
2348 * If we have a valid EOF offset cache we must call VOP_GETATTR()
2349 * and then check that is still valid, or if this is an NQNFS mount
2350 * we call NQNFS_CKCACHEABLE() instead of VOP_GETATTR(). Note that
2351 * VOP_GETATTR() does not necessarily go to the wire.
984263bc
MD
2352 */
2353 if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
5a9187cb 2354 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0) {
87de5057 2355 if (VOP_GETATTR(vp, &vattr) == 0 &&
e07fef60 2356 (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0
5a9187cb 2357 ) {
984263bc 2358 nfsstats.direofcache_hits++;
885ecb13 2359 goto done;
984263bc
MD
2360 }
2361 }
2362
2363 /*
5a9187cb
MD
2364 * Call nfs_bioread() to do the real work. nfs_bioread() does its
2365 * own cache coherency checks so we do not have to.
984263bc
MD
2366 */
2367 tresid = uio->uio_resid;
3b568787 2368 error = nfs_bioread(vp, uio, 0);
984263bc
MD
2369
2370 if (!error && uio->uio_resid == tresid)
2371 nfsstats.direofcache_misses++;
885ecb13 2372done:
c6b43e93 2373 lwkt_reltoken(&nmp->nm_token);
885ecb13 2374 vn_unlock(vp);
c6b43e93 2375
984263bc
MD
2376 return (error);
2377}
2378
2379/*
7d877edf
MD
2380 * Readdir rpc call. nfs_bioread->nfs_doio->nfs_readdirrpc.
2381 *
2382 * Note that for directories, nfs_bioread maintains the underlying nfs-centric
2383 * offset/block and converts the nfs formatted directory entries for userland
2384 * consumption as well as deals with offsets into the middle of blocks.
2385 * nfs_doio only deals with logical blocks. In particular, uio_offset will
2386 * be block-bounded. It must convert to cookies for the actual RPC.
984263bc
MD
2387 */
2388int
cc7d050e 2389nfs_readdirrpc_uio(struct vnode *vp, struct uio *uiop)
984263bc 2390{
40393ded 2391 int len, left;
01f31ab3 2392 struct nfs_dirent *dp = NULL;
40393ded 2393 u_int32_t *tl;
40393ded 2394 nfsuint64 *cookiep;
42edf14f 2395 caddr_t cp;
984263bc
MD
2396 nfsuint64 cookie;
2397 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2398 struct nfsnode *dnp = VTONFS(vp);
2399 u_quad_t fileno;
2400 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2401 int attrflag;
42edf14f
MD
2402 struct nfsm_info info;
2403
2404 info.mrep = NULL;
2405 info.v3 = NFS_ISV3(vp);
984263bc
MD
2406
2407#ifndef DIAGNOSTIC
2408 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2409 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2410 panic("nfs readdirrpc bad uio");
2411#endif
2412
2413 /*
2414 * If there is no cookie, assume directory was stale.
2415 */
2416 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2417 if (cookiep)
2418 cookie = *cookiep;
2419 else
2420 return (NFSERR_BAD_COOKIE);
2421 /*
2422 * Loop around doing readdir rpc's of size nm_readdirsize
2423 * truncated to a multiple of DIRBLKSIZ.
2424 * The stopping criteria is EOF or buffer full.
2425 */
2426 while (more_dirs && bigenough) {
2427 nfsstats.rpccnt[NFSPROC_READDIR]++;
42edf14f
MD
2428 nfsm_reqhead(&info, vp, NFSPROC_READDIR,
2429 NFSX_FH(info.v3) + NFSX_READDIR(info.v3));
2430 ERROROUT(nfsm_fhtom(&info, vp));
2431 if (info.v3) {
2432 tl = nfsm_build(&info, 5 * NFSX_UNSIGNED);
984263bc
MD
2433 *tl++ = cookie.nfsuquad[0];
2434 *tl++ = cookie.nfsuquad[1];
2435 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2436 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2437 } else {
5e6f1ca5
MD
2438 /*
2439 * WARNING! HAMMER DIRECTORIES WILL NOT WORK WELL
2440 * WITH NFSv2!!! There's nothing I can really do
2441 * about it other than to hope the server supports
2442 * rdirplus w/NFSv2.
2443 */
42edf14f 2444 tl = nfsm_build(&info, 2 * NFSX_UNSIGNED);
984263bc
MD
2445 *tl++ = cookie.nfsuquad[0];
2446 }
2447 *tl = txdr_unsigned(nmp->nm_readdirsize);
42edf14f
MD
2448 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READDIR,
2449 uiop->uio_td,
2450 nfs_vpcred(vp, ND_READ), &error));
2451 if (info.v3) {
2452 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag,
2453 NFS_LATTR_NOSHRINK));
2454 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED));
2455 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2456 dnp->n_cookieverf.nfsuquad[1] = *tl;
984263bc 2457 }
42edf14f 2458 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
984263bc
MD
2459 more_dirs = fxdr_unsigned(int, *tl);
2460
7d877edf 2461 /* loop thru the dir entries, converting them to std form */
984263bc 2462 while (more_dirs && bigenough) {
42edf14f
MD
2463 if (info.v3) {
2464 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
984263bc
MD
2465 fileno = fxdr_hyper(tl);
2466 len = fxdr_unsigned(int, *(tl + 2));
2467 } else {
42edf14f 2468 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED));
984263bc
MD
2469 fileno = fxdr_unsigned(u_quad_t, *tl++);
2470 len = fxdr_unsigned(int, *tl);
2471 }
2472 if (len <= 0 || len > NFS_MAXNAMLEN) {
2473 error = EBADRPC;
42edf14f
MD
2474 m_freem(info.mrep);
2475 info.mrep = NULL;
984263bc
MD
2476 goto nfsmout;
2477 }
7d877edf
MD
2478
2479 /*
2480 * len is the number of bytes in the path element
2481 * name, not including the \0 termination.
2482 *
2483 * tlen is the number of bytes w have to reserve for
2484 * the path element name.
2485 */
984263bc
MD
2486 tlen = nfsm_rndup(len);
2487 if (tlen == len)
2488 tlen += 4; /* To ensure null termination */
7d877edf
MD
2489
2490 /*
2491 * If the entry would cross a DIRBLKSIZ boundary,
2492 * extend the previous nfs_dirent to cover the
2493 * remaining space.
2494 */
984263bc 2495 left = DIRBLKSIZ - blksiz;
01f31ab3
JS
2496 if ((tlen + sizeof(struct nfs_dirent)) > left) {
2497 dp->nfs_reclen += left;
656849c6 2498 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
984263bc
MD
2499 uiop->uio_iov->iov_len -= left;
2500 uiop->uio_offset += left;
2501 uiop->uio_resid -= left;
2502 blksiz = 0;
2503 }
01f31ab3 2504 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid)
984263bc
MD
2505 bigenough = 0;
2506 if (bigenough) {
01f31ab3
JS
2507 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base;
2508 dp->nfs_ino = fileno;
2509 dp->nfs_namlen = len;
2510 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent);
2511 dp->nfs_type = DT_UNKNOWN;
2512 blksiz += dp->nfs_reclen;
984263bc
MD
2513 if (blksiz == DIRBLKSIZ)
2514 blksiz = 0;
01f31ab3
JS
2515 uiop->uio_offset += sizeof(struct nfs_dirent);
2516 uiop->uio_resid -= sizeof(struct nfs_dirent);
656849c6 2517 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent);
01f31ab3 2518 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent);
42edf14f 2519 ERROROUT(nfsm_mtouio(&info, uiop, len));
7d877edf
MD
2520
2521 /*
2522 * The uiop has advanced by nfs_dirent + len
2523 * but really needs to advance by
2524 * nfs_dirent + tlen
2525 */
984263bc
MD
2526 cp = uiop->uio_iov->iov_base;
2527 tlen -= len;
2528 *cp = '\0'; /* null terminate */
656849c6 2529 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen;
984263bc
MD
2530 uiop->uio_iov->iov_len -= tlen;
2531 uiop->uio_offset += tlen;
2532 uiop->uio_resid -= tlen;
7d877edf
MD
2533 } else {
2534 /*
2535 * NFS strings must be rounded up (nfsm_myouio
2536 * handled that in the bigenough case).
2537 */
42edf14f 2538 ERROROUT(nfsm_adv(&info, nfsm_rndup(len)));
7d877edf 2539 }
42edf14f
MD
2540 if (info.v3) {
2541 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
984263bc 2542 } else {
42edf14f 2543 NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED));
984263bc 2544 }
7d877edf
MD
2545
2546 /*
2547 * If we were able to accomodate the last entry,
2548 * get the cookie for the next one. Otherwise
2549 * hold-over the cookie for the one we were not
2550 * able to accomodate.
2551 */
984263bc
MD
2552 if (bigenough) {
2553 cookie.nfsuquad[0] = *tl++;
42edf14f 2554 if (info.v3)
984263bc 2555 cookie.nfsuquad[1] = *tl++;
42edf14f 2556 } else if (info.v3) {
984263bc 2557 tl += 2;
7d877edf 2558 } else {
984263bc 2559 tl++;
7d877edf 2560 }
984263bc
MD
2561 more_dirs = fxdr_unsigned(int, *tl);
2562 }
2563 /*
2564 * If at end of rpc data, get the eof boolean
2565 */
2566 if (!more_dirs) {
42edf14f 2567 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
984263bc
MD
2568 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2569 }
42edf14f
MD
2570 m_freem(info.mrep);
2571 info.mrep = NULL;
984263bc
MD
2572 }
2573 /*
2574 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2575 * by increasing d_reclen for the last record.
2576 */
2577 if (blksiz > 0) {
2578 left = DIRBLKSIZ - blksiz;
01f31ab3 2579 dp->nfs_reclen += left;
656849c6 2580 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
984263bc
MD
2581 uiop->uio_iov->iov_len -= left;
2582 uiop->uio_offset += left;
2583 uiop->uio_resid -= left;
2584 }
2585
7d877edf
MD
2586 if (bigenough) {
2587 /*
2588 * We hit the end of the directory, update direofoffset.
2589 */
984263bc 2590 dnp->n_direofoffset = uiop->uio_offset;
7d877edf
MD
2591 } else {
2592 /*
2593 * There is more to go, insert the link cookie so the
2594 * next block can be read.
2595 */
984263bc 2596 if (uiop->uio_resid > 0)
086c1d7e 2597 kprintf("EEK! readdirrpc resid > 0\n");
984263bc
MD
2598 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2599 *cookiep = cookie;
2600 }
2601nfsmout:
2602 return (error);
2603}
2604
2605/*
2606 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2607 */
2608int
cc7d050e 2609nfs_readdirplusrpc_uio(struct vnode *vp, struct uio *uiop)
984263bc 2610{
40393ded 2611 int len, left;
01f31ab3 2612 struct nfs_dirent *dp;
40393ded 2613 u_int32_t *tl;
40393ded
RG
2614 struct vnode *newvp;
2615 nfsuint64 *cookiep;
42edf14f
MD
2616 caddr_t dpossav1, dpossav2;
2617 caddr_t cp;
2618 struct mbuf *mdsav1, *mdsav2;
984263bc
MD
2619 nfsuint64 cookie;
2620 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2621 struct nfsnode *dnp = VTONFS(vp), *np;
2622 nfsfh_t *fhp;
2623 u_quad_t fileno;
2624 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2625 int attrflag, fhsize;
28623bf9
MD
2626 struct nchandle nch;
2627 struct nchandle dnch;
fad57d0e 2628 struct nlcomponent nlc;
42edf14f
MD
2629 struct nfsm_info info;
2630
2631 info.mrep = NULL;
2632 info.v3 = 1;
984263bc
MD
2633
2634#ifndef nolint
01f31ab3 2635 dp = NULL;
984263bc
MD
2636#endif
2637#ifndef DIAGNOSTIC
2638 if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2639 (uiop->uio_resid & (DIRBLKSIZ - 1)))
2640 panic("nfs readdirplusrpc bad uio");
2641#endif
fad57d0e
MD
2642 /*
2643 * Obtain the namecache record for the directory so we have something
2644 * to use as a basis for creating the entries. This function will
2645 * return a held (but not locked) ncp. The ncp may be disconnected
2646 * from the tree and cannot be used for upward traversals, and the
2647 * ncp may be unnamed. Note that other unrelated operations may
2648 * cause the ncp to be named at any time.
94f2e6f2
MD
2649 *
2650 * We have to lock the ncp to prevent a lock order reversal when
2651 * rdirplus does nlookups of the children, because the vnode is
2652 * locked and has to stay that way.
fad57d0e 2653 */
28623bf9 2654 cache_fromdvp(vp, NULL, 0, &dnch);
fad57d0e 2655 bzero(&nlc, sizeof(nlc));
984263bc
MD
2656 newvp = NULLVP;
2657
2658 /*
2659 * If there is no cookie, assume directory was stale.
2660 */
2661 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
af5fde9c 2662 if (cookiep) {
984263bc 2663 cookie = *cookiep;
af5fde9c
MD
2664 } else {
2665 if (dnch.ncp)
2666 cache_drop(&dnch);
984263bc 2667 return (NFSERR_BAD_COOKIE);
af5fde9c
MD
2668 }
2669
984263bc
MD
2670 /*
2671 * Loop around doing readdir rpc's of size nm_readdirsize
2672 * truncated to a multiple of DIRBLKSIZ.
2673 * The stopping criteria is EOF or buffer full.
2674 */
2675 while (more_dirs && bigenough) {
2676 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
42edf14f 2677 nfsm_reqhead(&info, vp, NFSPROC_READDIRPLUS,
226341c1 2678 NFSX_FH(info.v3) + 6 * NFSX_UNSIGNED);
42edf14f
MD
2679 ERROROUT(nfsm_fhtom(&info, vp));
2680 tl = nfsm_build(&info, 6 * NFSX_UNSIGNED);
984263bc
MD
2681 *tl++ = cookie.nfsuquad[0];
2682 *tl++ = cookie.nfsuquad[1];
2683 *tl++ = dnp->n_cookieverf.nfsuquad[0];
2684 *tl++ = dnp->n_cookieverf.nfsuquad[1];
2685 *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2686 *tl = txdr_unsigned(nmp->nm_rsize);
42edf14f
MD
2687 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READDIRPLUS,
2688 uiop->uio_td,
2689 nfs_vpcred(vp, ND_READ), &error));
2690 ERROROUT(nfsm_postop_attr(&info, vp, &attrflag,
2691 NFS_LATTR_NOSHRINK));
2692 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
984263bc
MD
2693 dnp->n_cookieverf.nfsuquad[0] = *tl++;
2694 dnp->n_cookieverf.nfsuquad[1] = *tl++;
2695 more_dirs = fxdr_unsigned(int, *tl);
2696
2697 /* loop thru the dir entries, doctoring them to 4bsd form */
2698 while (more_dirs && bigenough) {
42edf14f 2699 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
984263bc
MD
2700 fileno = fxdr_hyper(tl);
2701 len = fxdr_unsigned(int, *(tl + 2));
2702 if (len <= 0 || len > NFS_MAXNAMLEN) {
2703 error = EBADRPC;
42edf14f
MD
2704 m_freem(info.mrep);
2705 info.mrep = NULL;
984263bc
MD
2706 goto nfsmout;
2707 }
2708 tlen = nfsm_rndup(len);
2709 if (tlen == len)
2710 tlen += 4; /* To ensure null termination*/
2711 left = DIRBLKSIZ - blksiz;
01f31ab3
JS
2712 if ((tlen + sizeof(struct nfs_dirent)) > left) {
2713 dp->nfs_reclen += left;
656849c6 2714 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
984263bc
MD
2715 uiop->uio_iov->iov_len -= left;
2716 uiop->uio_offset += left;
2717 uiop->uio_resid -= left;
2718 blksiz = 0;
2719 }
01f31ab3 2720 if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid)
984263bc
MD
2721 bigenough = 0;
2722 if (bigenough) {
01f31ab3
JS
2723 dp = (struct nfs_dirent *)uiop->uio_iov->iov_base;
2724 dp->nfs_ino = fileno;
2725 dp->nfs_namlen = len;
2726 dp->nfs_reclen = tlen + sizeof(struct nfs_dirent);
2727 dp->nfs_type = DT_UNKNOWN;
2728 blksiz += dp->nfs_reclen;
984263bc
MD
2729 if (blksiz == DIRBLKSIZ)
2730 blksiz = 0;
01f31ab3
JS
2731 uiop->uio_offset += sizeof(struct nfs_dirent);
2732 uiop->uio_resid -= sizeof(struct nfs_dirent);
656849c6 2733 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent);
01f31ab3 2734 uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent);
fad57d0e
MD
2735 nlc.nlc_nameptr = uiop->uio_iov->iov_base;
2736 nlc.nlc_namelen = len;
42edf14f 2737 ERROROUT(nfsm_mtouio(&info, uiop, len));
984263bc
MD
2738 cp = uiop->uio_iov->iov_base;
2739 tlen -= len;
2740 *cp = '\0';
656849c6 2741 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen;
984263bc
MD
2742 uiop->uio_iov->iov_len -= tlen;
2743 uiop->uio_offset += tlen;
2744 uiop->uio_resid -= tlen;
42edf14f
MD
2745 } else {
2746 ERROROUT(nfsm_adv(&info, nfsm_rndup(len)));
2747 }
2748 NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED));
984263bc
MD
2749 if (bigenough) {
2750 cookie.nfsuquad[0] = *tl++;
2751 cookie.nfsuquad[1] = *tl++;
af5fde9c 2752 } else {
984263bc 2753 tl += 2;
af5fde9c 2754 }
984263bc
MD
2755
2756 /*
2757 * Since the attributes are before the file handle
2758 * (sigh), we must skip over the attributes and then
2759 * come back and get them.
2760 */
2761 attrflag = fxdr_unsigned(int, *tl);
2762 if (attrflag) {
42edf14f
MD
2763 dpossav1 = info.dpos;
2764 mdsav1 = info.md;
2765 ERROROUT(nfsm_adv(&info, NFSX_V3FATTR));
2766 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
984263bc
MD
2767 doit = fxdr_unsigned(int, *tl);
2768 if (doit) {
42edf14f 2769 NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp));
984263bc 2770 }
af5fde9c
MD
2771 if (doit && bigenough && !nlcdegenerate(&nlc) &&
2772 !NFS_CMPFH(dnp, fhp, fhsize)
2773 ) {
28623bf9 2774 if (dnch.ncp) {
269a08e4 2775#if 0
086c1d7e 2776 kprintf("NFS/READDIRPLUS, ENTER %*.*s\n",
fad57d0e
MD
2777 nlc.nlc_namelen, nlc.nlc_namelen,
2778 nlc.nlc_nameptr);
269a08e4 2779#endif
94f2e6f2
MD
2780 /*
2781 * This is a bit hokey but there isn't
2782 * much we can do about it. We can't
2783 * hold the directory vp locked while
2784 * doing lookups and gets.
2785 */
668b43c5
MD
2786 nch = cache_nlookup_nonblock(&dnch, &nlc);
2787 if (nch.ncp == NULL)
2788 goto rdfail;
28623bf9 2789 cache_setunresolved(&nch);
668b43c5 2790 error = nfs_nget_nonblock(vp->v_mount, fhp,
c9682b51
MD
2791 fhsize, &np,
2792 NULL);
668b43c5
MD
2793 if (error) {
2794 cache_put(&nch);
2795 goto rdfail;
2595d6be 2796 }
668b43c5
MD
2797 newvp = NFSTOV(np);
2798 dpossav2 = info.dpos;
2799 info.dpos = dpossav1;
2800 mdsav2 = info.md;
2801 info.md = mdsav1;
2802 ERROROUT(nfsm_loadattr(&info, newvp, NULL));
2803 info.dpos = dpossav2;
2804 info.md = mdsav2;
2805 dp->nfs_type =
2806 IFTODT(VTTOIF(np->n_vattr.va_type));
2807 nfs_cache_setvp(&nch, newvp,
2808 nfspos_cache_timeout);
2809 vput(newvp);
2810 newvp = NULLVP;
af5fde9c 2811 cache_put(&nch);
fad57d0e 2812 } else {
668b43c5 2813rdfail:
09bd4fbc
MD
2814 ;
2815#if 0
269a08e4
MD
2816 kprintf("Warning: NFS/rddirplus, "
2817 "UNABLE TO ENTER %*.*s\n",
fad57d0e
MD
2818 nlc.nlc_namelen, nlc.nlc_namelen,
2819 nlc.nlc_nameptr);
09bd4fbc 2820#endif
fad57d0e 2821 }
984263bc
MD
2822 }
2823 } else {
2824 /* Just skip over the file handle */
42edf14f 2825 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
984263bc 2826 i = fxdr_unsigned(int, *tl);
42edf14f 2827 ERROROUT(nfsm_adv(&info, nfsm_rndup(i)));
984263bc 2828 }
42edf14f 2829 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
984263bc
MD
2830 more_dirs = fxdr_unsigned(int, *tl);
2831 }
2832 /*
2833 * If at end of rpc data, get the eof boolean
2834 */
2835 if (!more_dirs) {
42edf14f 2836 NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED));
984263bc
MD
2837 more_dirs = (fxdr_unsigned(int, *tl) == 0);
2838 }
42edf14f
MD
2839 m_freem(info.mrep);
2840 info.mrep = NULL;
984263bc
MD
2841 }
2842 /*
2843 * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2844 * by increasing d_reclen for the last record.
2845 */
2846 if (blksiz > 0) {
2847 left = DIRBLKSIZ - blksiz;
01f31ab3 2848 dp->nfs_reclen += left;
656849c6 2849 uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left;
984263bc
MD
2850 uiop->uio_iov->iov_len -= left;
2851 uiop->uio_offset += left;
2852 uiop->uio_resid -= left;
2853 }
2854
2855 /*
2856 * We are now either at the end of the directory or have filled the
2857 * block.
2858 */
af5fde9c 2859 if (bigenough) {
984263bc 2860 dnp->n_direofoffset = uiop->uio_offset;
af5fde9c 2861 } else {
984263bc 2862 if (uiop->uio_resid > 0)
086c1d7e 2863 kprintf("EEK! readdirplusrpc resid > 0\n");
984263bc
MD
2864 cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2865 *cookiep = cookie;
2866 }
2867nfsmout:
2868 if (newvp != NULLVP) {
2869 if (newvp == vp)
2870 vrele(newvp);
2871 else
2872 vput(newvp);
2873 newvp = NULLVP;
2874 }
28623bf9
MD
2875 if (dnch.ncp)
2876 cache_drop(&dnch);
984263bc
MD
2877 return (error);
2878}
2879
2880/*
2881 * Silly rename. To make the NFS filesystem that is stateless look a little
2882 * more like the "ufs" a remove of an active vnode is translated to a rename
2883 * to a funny looking filename that is removed by nfs_inactive on the
2884 * nfsnode. There is the potential for another process on a different client
2885 * to create the same funny name between the nfs_lookitup() fails and the
2886 * nfs_rename() completes, but...
2887 */
2888static int
e851b29e 2889nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
984263bc 2890{
40393ded 2891 struct sillyrename *sp;
984263bc
MD
2892 struct nfsnode *np;
2893 int error;
984263bc 2894
8c361dda
MD
2895 /*
2896 * We previously purged dvp instead of vp. I don't know why, it
2897 * completely destroys performance. We can't do it anyway with the
2898 * new VFS API since we would be breaking the namecache topology.
2899 */
fad57d0e 2900 cache_purge(vp); /* XXX */
984263bc
MD
2901 np = VTONFS(vp);
2902#ifndef DIAGNOSTIC
2903 if (vp->v_type == VDIR)
2904 panic("nfs: sillyrename dir");
2905#endif
884717e1 2906 sp = kmalloc(sizeof(struct sillyrename), M_NFSREQ, M_WAITOK);
984263bc
MD
2907 sp->s_cred = crdup(cnp->cn_cred);
2908 sp->s_dvp = dvp;
597aea93 2909 vref(dvp);
984263bc
MD
2910
2911 /* Fudge together a funny name */
973c11b9
MD
2912 sp->s_namlen = ksprintf(sp->s_name, ".nfsA%08x4.4",
2913 (int)(intptr_t)cnp->cn_td);
984263bc
MD
2914
2915 /* Try lookitups until we get one that isn't there */
2916 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
60233e58 2917 cnp->cn_td, NULL) == 0) {
984263bc
MD
2918 sp->s_name[4]++;
2919 if (sp->s_name[4] > 'z') {
2920 error = EINVAL;
2921 goto bad;
2922 }
2923 }
2924 error = nfs_renameit(dvp, cnp, sp);
2925 if (error)
2926 goto bad;
2927 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
dadab5e9 2928 cnp->cn_td, &np);
984263bc
MD
2929 np->n_sillyrename = sp;
2930 return (0);
2931bad:
2932 vrele(sp->s_dvp);
2933 crfree(sp->s_cred);
efda3bd0 2934 kfree((caddr_t)sp, M_NFSREQ);
984263bc
MD
2935 return (error);
2936}
2937
2938/*
2939 * Look up a file name and optionally either update the file handle or
2940 * allocate an nfsnode, depending on the value of npp.
2941 * npp == NULL --> just do the lookup
2942 * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2943 * handled too
2944 * *npp != NULL --> update the file handle in the vnode
2945 */
2946static int
e851b29e
CP
2947nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred,
2948 struct thread *td, struct nfsnode **npp)
984263bc 2949{
60233e58 2950 struct vnode *newvp = NULL;
984263bc 2951 struct nfsnode *np, *dnp = VTONFS(dvp);
984263bc 2952 int error = 0, fhlen, attrflag;
984263bc 2953 nfsfh_t *nfhp;
42edf14f
MD
2954 struct nfsm_info info;
2955
2956 info.mrep = NULL;
2957 info.v3 = NFS_ISV3(dvp);
984263bc
MD
2958
2959 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
42edf14f
MD
2960 nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP,
2961 NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2962 ERROROUT(nfsm_fhtom(&info, dvp));
2963 ERROROUT(nfsm_strtom(&info, name, len, NFS_MAXNAMLEN));
2964 NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, td, cred, &error));
984263bc 2965 if (npp && !error) {
42edf14f 2966 NEGATIVEOUT(fhlen = nfsm_getfh(&info, &nfhp));
984263bc
MD
2967 if (*npp) {
2968 np = *npp;
2969 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
efda3bd0 2970 kfree((caddr_t)np->n_fhp, M_NFSBIGFH);
984263bc
MD
2971 np->n_fhp = &np->n_fh;
2972 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
efda3bd0 2973 np->n_fhp =(nfsfh_t *)kmalloc(fhlen,M_NFSBIGFH,M_WAITOK);
984263bc
MD
2974 bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2975 np->n_fhsize = fhlen;
2976 newvp = NFSTOV(np);
2977 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
597aea93 2978 vref(dvp);
984263bc
MD
2979 newvp = dvp;
2980 } else {
c9682b51 2981 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np, NULL);
984263bc 2982 if (error) {
42edf14f
MD
2983 m_freem(info.mrep);
2984 info.mrep = NULL;
984263bc
MD
2985 return (error);
2986 }
2987 newvp = NFSTOV(np);
2988 }
42edf14f
MD
2989 if (info.v3) {
2990 ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag,
2991 NFS_LATTR_NOSHRINK));
984263bc 2992 if (!attrflag && *npp == NULL) {
42edf14f
MD
2993 m_freem(info.mrep);
2994 info.mrep = NULL;
984263bc
MD
2995 if (newvp == dvp)
2996 vrele(newvp);
2997 else
2998 vput(newvp);
2999 return (ENOENT);
3000 }
42edf14f 3001 } else {
fc6058ba 3002 ERROROUT(nfsm_loadattr(&info, newvp, NULL));
42edf14f 3003 }
984263bc 3004 }
42edf14f
MD
3005 m_freem(info.mrep);
3006 info.mrep = NULL;
6b08710e 3007nfsmout:
984263bc
MD
3008 if (npp && *npp == NULL) {
3009 if (error) {
3010 if (newvp) {
3011 if (newvp == dvp)
3012 vrele(newvp);
3013 else
3014 vput(newvp);
3015 }
3016 } else
3017 *npp = np;
3018 }
3019 return (error);
3020}
3021
3022/*
3023 * Nfs Version 3 commit rpc
cc7d050e
MD
3024 *
3025 * We call it 'uio' to distinguish it from 'bio' but there is no real uio
3026 * involved.
984263bc
MD
3027 */
3028int
cc7d050e 3029nfs_commitrpc_uio(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td)
984263bc 3030{
40393ded 3031 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
984263bc 3032 int error = 0, wccflag = NFSV3_WCCRATTR;
42edf14f
MD
3033 struct nfsm_info info;
3034 u_int32_t *tl;
3035
3036 info.mrep = NULL;
3037 info.v3 = 1;
984263bc
MD
3038
3039 if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0)
3040 return (0);
3041 nfsstats.rpccnt[NFSPROC_COMMIT]++;
42edf14f
MD
3042 nfsm_reqhead(&info, vp, NFSPROC_COMMIT, NFSX_FH(1));
3043 ERROROUT(nfsm_fhtom(&info, vp));
3044 tl = nfsm_build(&info, 3 * NFSX_UNSIGNED);
984263bc
MD
3045 txdr_hyper(offset, tl);
3046 tl += 2;
3047 *tl = txdr_unsigned(cnt);
42edf14f
MD
3048 NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_COMMIT, td,
3049 nfs_vpcred(vp, ND_WRITE), &error));
3050 ERROROUT(nfsm_wcc_data(&info, vp, &wccflag));
984263bc 3051 if (!error) {
42edf14f 3052 NULLOUT(tl = nfsm_dissect(&info, NFSX_V3WRITEVERF));
984263bc
MD
3053 if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
3054 NFSX_V3WRITEVERF)) {
3055 bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
3056 NFSX_V3WRITEVERF);
3057 error = NFSERR_STALEWRITEVERF;
3058 }
3059 }
42edf14f
MD
3060 m_freem(info.mrep);
3061 info.mrep = NULL;
6b08710e 3062nfsmout:
984263bc
MD
3063 return (error);
3064}
3065
3066/*
3067 * Kludge City..
3068 * - make nfs_bmap() essentially a no-op that does no translation
3069 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
3070 * (Maybe I could use the process's page mapping, but I was concerned that
3071 * Kernel Write might not be enabled and also figured copyout() would do
3072 * a lot more work than bcopy() and also it currently happens in the
3073 * context of the swapper process (2).
e851b29e 3074 *
08daea96 3075 * nfs_bmap(struct vnode *a_vp, off_t a_loffset,
54078292 3076 * off_t *a_doffsetp, int *a_runp, int *a_runb)
984263bc
MD
3077 */
3078static int
e851b29e 3079nfs_bmap(struct vop_bmap_args *ap)
984263bc 3080{
c6b43e93 3081 /* no token lock required */
54078292
MD
3082 if (ap->a_doffsetp != NULL)
3083 *ap->a_doffsetp = ap->a_loffset;
984263bc
MD
3084 if (ap->a_runp != NULL)
3085 *ap->a_runp = 0;
3086 if (ap->a_runb != NULL)
3087 *ap->a_runb = 0;
3088 return (0);
3089}
3090
3091/*
3092 * Strategy routine.
984263bc
MD
3093 */
3094static int
e851b29e 3095nfs_strategy(struct vop_strategy_args *ap)
984263bc 3096{
81b5c339
MD
3097 struct bio *bio = ap->a_bio;
3098 struct bio *nbio;
f64b567c 3099 struct buf *bp __debugvar = bio->bio_buf;
c6b43e93 3100 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount);
dadab5e9 3101 struct thread *td;
cc7d050e 3102 int error;
984263bc 3103
10f3fee5
MD
3104 KASSERT(bp->b_cmd != BUF_CMD_DONE,
3105 ("nfs_strategy: buffer %p unexpectedly marked done", bp));
81b5c339
MD
3106 KASSERT(BUF_REFCNT(bp) > 0,
3107 ("nfs_strategy: buffer %p not locked", bp));
984263bc 3108
ae8e83e6 3109 if (bio->bio_flags & BIO_SYNC)
dadab5e9 3110 td = curthread; /* XXX */
ae8e83e6
MD
3111 else
3112 td = NULL;
984263bc 3113
c6b43e93
MD
3114 lwkt_gettoken(&nmp->nm_token);
3115
81b5c339 3116 /*
54078292
MD
3117 * We probably don't need to push an nbio any more since no
3118 * block conversion is required due to the use of 64 bit byte
3119 * offsets, but do it anyway.
8bfa5617
MD
3120 *
3121 * NOTE: When NFS callers itself via this strategy routines and
3122 * sets up a synchronous I/O, it expects the I/O to run
3123 * synchronously (its bio_done routine just assumes it),
3124 * so for now we have to honor the bit.
81b5c339
MD
3125 */
3126 nbio = push_bio(bio);
54078292 3127 nbio->bio_offset = bio->bio_offset;
8bfa5617 3128 nbio->bio_flags = bio->bio_flags & BIO_SYNC;
81b5c339 3129
984263bc
MD
3130 /*
3131 * If the op is asynchronous and an i/o daemon is waiting
3132 * queue the request, wake it up and wait for completion
3133 * otherwise just do it ourselves.
3134 */
edb90c22 3135 if (bio->bio_flags & BIO_SYNC) {
cc7d050e 3136 error = nfs_doio(ap->a_vp, nbio, td);
edb90c22
MD
3137 } else {
3138 nfs_asyncio(ap->a_vp, nbio);
cc7d050e 3139 error = 0;
edb90c22 3140 }
c6b43e93
MD
3141 lwkt_reltoken(&nmp->nm_token);
3142
cc7d050e 3143 return (error);
984263bc
MD
3144}
3145
3146/*
3147 * Mmap a file
3148 *
3149 * NB Currently unsupported.
e851b29e 3150 *
b478fdce 3151 * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred)
984263bc
MD
3152 */
3153/* ARGSUSED */
3154static int
e851b29e 3155nfs_mmap(struct vop_mmap_args *ap)
984263bc 3156{
c6b43e93 3157 /* no token lock required */
984263bc
MD
3158 return (EINVAL);
3159}
3160
3161/*
3162 * fsync vnode op. Just call nfs_flush() with commit == 1.
e851b29e 3163 *
b478fdce 3164 * nfs_fsync(struct vnode *a_vp, int a_waitfor)
984263bc
MD
3165 */
3166/* ARGSUSED */
3167static int
e851b29e 3168nfs_fsync(struct vop_fsync_args *ap)
984263bc 3169{
c6b43e93
MD
3170 struct nfsmount *nmp = VFSTONFS(ap->a_vp->v_mount);
3171 int error;
3172
3173 lwkt_gettoken(&nmp->nm_token);
3174 error = nfs_flush(ap->a_vp, ap->a_waitfor, curthread, 1);
3175 lwkt_reltoken(&nmp->nm_token);
3176
3177 return error;
984263bc
MD
3178}
3179
3180/*
6bae6177
MD
3181 * Flush all the blocks associated with a vnode. Dirty NFS buffers may be
3182 * in one of two states: If B_NEEDCOMMIT is clear then the buffer contains
3183 * new NFS data which needs to be written to the server. If B_NEEDCOMMIT is
3184 * set the buffer contains data that has already been written to the server
3185 * and which now needs a commit RPC.
3186 *
3187 * If commit is 0 we only take one pass and only flush buffers containing new
3188 * dirty data.
3189 *
3190 * If commit is 1 we take two passes, issuing a commit RPC in the second
3191 * pass.
3192 *
3193 * If waitfor is MNT_WAIT and commit is 1, we loop as many times as required
3194 * to completely flush all pending data.
3195 *
3196 * Note that the RB_SCAN code properly handles the case where the
3197 * callback might block and directly or indirectly (another thread) cause
3198 * the RB tree to change.
984263bc 3199 */
6bae6177
MD
3200
3201#ifndef NFS_COMMITBVECSIZ
3202#define NFS_COMMITBVECSIZ 16
3203#endif
3204
3205struct nfs_flush_info {
3206 enum { NFI_FLUSHNEW, NFI_COMMIT } mode;
3207 struct thread *td;
3208 struct vnode *vp;
3209 int waitfor;
3210 int slpflag;
3211 int slptimeo;
3212 int loops;
3213 struct buf *bvary[NFS_COMMITBVECSIZ];
3214 int bvsize;
3215 off_t beg_off;
3216 off_t end_off;
3217};
3218
3219static int nfs_flush_bp(struct buf *bp, void *data);
3220static int nfs_flush_docommit(struct nfs_flush_info *info, int error);
3221
5a9187cb 3222int
e851b29e 3223nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit)
984263bc 3224{
40393ded 3225 struct nfsnode *np = VTONFS(vp);
984263bc 3226 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
6bae6177
MD
3227 struct nfs_flush_info info;
3228 int error;
984263bc 3229
6bae6177
MD
3230 bzero(&info, sizeof(info));
3231 info.td = td;
3232 info.vp = vp;
3233 info.waitfor = waitfor;
3234 info.slpflag = (nmp->nm_flag & NFSMNT_INT) ? PCATCH : 0;
3235 info.loops = 0;
3b998fa9 3236 lwkt_gettoken(&vp->v_token);
6bae6177
MD
3237
3238 do {
984263bc 3239 /*
6bae6177 3240 * Flush mode
984263bc 3241 */
6bae6177
MD
3242 info.mode = NFI_FLUSHNEW;
3243 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
3244 nfs_flush_bp, &info);
3245
3246 /*
3247 * Take a second pass if committing and no error occured.
3248 * Clean up any left over collection (whether an error
3249 * occurs or not).
3250 */
3251 if (commit && error == 0) {
3252 info.mode = NFI_COMMIT;
3253 error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL,
3254 nfs_flush_bp, &info);
3255 if (info.bvsize)
3256 error = nfs_flush_docommit(&info, error);
984263bc 3257 }
6bae6177 3258
984263bc 3259 /*
6bae6177
MD
3260 * Wait for pending I/O to complete before checking whether
3261 * any further dirty buffers exist.
984263bc 3262 */
a9a20f98
MD
3263 while (waitfor == MNT_WAIT &&
3264 bio_track_active(&vp->v_track_write)) {
3265 error = bio_track_wait(&vp->v_track_write,
3266 info.slpflag, info.slptimeo);
6bae6177
MD
3267 if (error) {
3268 /*
3269 * We have to be able to break out if this
3270 * is an 'intr' mount.
3271 */
60233e58 3272 if (nfs_sigintr(nmp, NULL, td)) {
6bae6177
MD
3273 error = -EINTR;
3274 break;
3275 }
3276
3277 /*
3278 * Since we do not process pending signals,
3279 * once we get a PCATCH our tsleep() will no
3280 * longer sleep, switch to a fixed timeout
3281 * instead.
3282 */
3283 if (info.slpflag == PCATCH) {
3284 info.slpflag = 0;
3285 info.slptimeo = 2 * hz;
3286 }
3287 error = 0;
3288 }
3289 }
3290 ++info.loops;
3291 /*
3292 * Loop if we are flushing synchronous as well as committing,
3293 * and dirty buffers are still present. Otherwise we might livelock.
3294 */
3295 } while (waitfor == MNT_WAIT && commit &&
3296 error == 0 && !RB_EMPTY(&vp->v_rbdirty_tree));
3297
3298 /*
3299 * The callbacks have to return a negative error to terminate the
3300 * RB scan.
3301 */
3302 if (error < 0)
3303 error = -error;
3304
3305 /*
3306 * Deal with any error collection
3307 */
3308 if (np->n_flag & NWRITEERR) {
3309 error = np->n_error;
3310 np->n_flag &= ~NWRITEERR;
3311