MP Implementation 1/2: Get the APIC code working again, sweetly integrate the
[dragonfly.git] / sys / vfs / msdosfs / msdosfs_vnops.c
CommitLineData
984263bc 1/* $FreeBSD: src/sys/msdosfs/msdosfs_vnops.c,v 1.95.2.4 2003/06/13 15:05:47 trhodes Exp $ */
8a8d5d85 2/* $DragonFly: src/sys/vfs/msdosfs/msdosfs_vnops.c,v 1.7 2003/07/06 21:23:52 dillon Exp $ */
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3/* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg Exp $ */
4
5/*-
6 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
7 * Copyright (C) 1994, 1995, 1997 TooLs GmbH.
8 * All rights reserved.
9 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by TooLs GmbH.
22 * 4. The name of TooLs GmbH may not be used to endorse or promote products
23 * derived from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
31 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
33 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
34 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 */
36/*
37 * Written by Paul Popelka (paulp@uts.amdahl.com)
38 *
39 * You can do anything you want with this software, just don't say you wrote
40 * it, and don't remove this notice.
41 *
42 * This software is provided "as is".
43 *
44 * The author supplies this software to be publicly redistributed on the
45 * understanding that the author is not responsible for the correct
46 * functioning of this software in any circumstances and is not liable for
47 * any damages caused by this software.
48 *
49 * October 1992
50 */
51
52#include <sys/param.h>
53#include <sys/systm.h>
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54#include <sys/resourcevar.h> /* defines plimit structure in proc struct */
55#include <sys/kernel.h>
56#include <sys/stat.h>
57#include <sys/buf.h>
58#include <sys/proc.h>
dadab5e9 59#include <sys/namei.h>
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60#include <sys/mount.h>
61#include <sys/unistd.h>
62#include <sys/vnode.h>
63#include <sys/malloc.h>
64#include <sys/dirent.h>
65#include <sys/signalvar.h>
66
67#include <vm/vm.h>
68#include <vm/vm_extern.h>
69#include <vm/vm_zone.h>
70#include <vm/vnode_pager.h>
71
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72#include <sys/buf2.h>
73
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74#include <msdosfs/bpb.h>
75#include <msdosfs/direntry.h>
76#include <msdosfs/denode.h>
77#include <msdosfs/msdosfsmount.h>
78#include <msdosfs/fat.h>
79
80#define DOS_FILESIZE_MAX 0xffffffff
81
82/*
83 * Prototypes for MSDOSFS vnode operations
84 */
85static int msdosfs_create __P((struct vop_create_args *));
86static int msdosfs_mknod __P((struct vop_mknod_args *));
87static int msdosfs_close __P((struct vop_close_args *));
88static int msdosfs_access __P((struct vop_access_args *));
89static int msdosfs_getattr __P((struct vop_getattr_args *));
90static int msdosfs_setattr __P((struct vop_setattr_args *));
91static int msdosfs_read __P((struct vop_read_args *));
92static int msdosfs_write __P((struct vop_write_args *));
93static int msdosfs_fsync __P((struct vop_fsync_args *));
94static int msdosfs_remove __P((struct vop_remove_args *));
95static int msdosfs_link __P((struct vop_link_args *));
96static int msdosfs_rename __P((struct vop_rename_args *));
97static int msdosfs_mkdir __P((struct vop_mkdir_args *));
98static int msdosfs_rmdir __P((struct vop_rmdir_args *));
99static int msdosfs_symlink __P((struct vop_symlink_args *));
100static int msdosfs_readdir __P((struct vop_readdir_args *));
101static int msdosfs_bmap __P((struct vop_bmap_args *));
102static int msdosfs_strategy __P((struct vop_strategy_args *));
103static int msdosfs_print __P((struct vop_print_args *));
104static int msdosfs_pathconf __P((struct vop_pathconf_args *ap));
105static int msdosfs_getpages __P((struct vop_getpages_args *));
106static int msdosfs_putpages __P((struct vop_putpages_args *));
107
108/*
109 * Some general notes:
110 *
111 * In the ufs filesystem the inodes, superblocks, and indirect blocks are
112 * read/written using the vnode for the filesystem. Blocks that represent
113 * the contents of a file are read/written using the vnode for the file
114 * (including directories when they are read/written as files). This
115 * presents problems for the dos filesystem because data that should be in
116 * an inode (if dos had them) resides in the directory itself. Since we
117 * must update directory entries without the benefit of having the vnode
118 * for the directory we must use the vnode for the filesystem. This means
119 * that when a directory is actually read/written (via read, write, or
120 * readdir, or seek) we must use the vnode for the filesystem instead of
121 * the vnode for the directory as would happen in ufs. This is to insure we
122 * retreive the correct block from the buffer cache since the hash value is
123 * based upon the vnode address and the desired block number.
124 */
125
126/*
127 * Create a regular file. On entry the directory to contain the file being
128 * created is locked. We must release before we return. We must also free
129 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or
130 * only if the SAVESTART bit in cn_flags is clear on success.
131 */
132static int
133msdosfs_create(ap)
134 struct vop_create_args /* {
135 struct vnode *a_dvp;
136 struct vnode **a_vpp;
137 struct componentname *a_cnp;
138 struct vattr *a_vap;
139 } */ *ap;
140{
141 struct componentname *cnp = ap->a_cnp;
142 struct denode ndirent;
143 struct denode *dep;
144 struct denode *pdep = VTODE(ap->a_dvp);
145 struct timespec ts;
146 int error;
147
148#ifdef MSDOSFS_DEBUG
149 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap);
150#endif
151
152 /*
153 * If this is the root directory and there is no space left we
154 * can't do anything. This is because the root directory can not
155 * change size.
156 */
157 if (pdep->de_StartCluster == MSDOSFSROOT
158 && pdep->de_fndoffset >= pdep->de_FileSize) {
159 error = ENOSPC;
160 goto bad;
161 }
162
163 /*
164 * Create a directory entry for the file, then call createde() to
165 * have it installed. NOTE: DOS files are always executable. We
166 * use the absence of the owner write bit to make the file
167 * readonly.
168 */
169#ifdef DIAGNOSTIC
170 if ((cnp->cn_flags & HASBUF) == 0)
171 panic("msdosfs_create: no name");
172#endif
173 bzero(&ndirent, sizeof(ndirent));
174 error = uniqdosname(pdep, cnp, ndirent.de_Name);
175 if (error)
176 goto bad;
177
178 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ?
179 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY;
180 ndirent.de_LowerCase = 0;
181 ndirent.de_StartCluster = 0;
182 ndirent.de_FileSize = 0;
183 ndirent.de_dev = pdep->de_dev;
184 ndirent.de_devvp = pdep->de_devvp;
185 ndirent.de_pmp = pdep->de_pmp;
186 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
187 getnanotime(&ts);
188 DETIMES(&ndirent, &ts, &ts, &ts);
189 error = createde(&ndirent, pdep, &dep, cnp);
190 if (error)
191 goto bad;
192 *ap->a_vpp = DETOV(dep);
193 return (0);
194
195bad:
196 return (error);
197}
198
199static int
200msdosfs_mknod(ap)
201 struct vop_mknod_args /* {
202 struct vnode *a_dvp;
203 struct vnode **a_vpp;
204 struct componentname *a_cnp;
205 struct vattr *a_vap;
206 } */ *ap;
207{
208
209 switch (ap->a_vap->va_type) {
210 case VDIR:
211 return (msdosfs_mkdir((struct vop_mkdir_args *)ap));
212 break;
213
214 case VREG:
215 return (msdosfs_create((struct vop_create_args *)ap));
216 break;
217
218 default:
219 return (EINVAL);
220 }
221 /* NOTREACHED */
222}
223
224static int
225msdosfs_close(ap)
226 struct vop_close_args /* {
227 struct vnode *a_vp;
228 int a_fflag;
229 struct ucred *a_cred;
dadab5e9 230 struct thread *a_td;
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231 } */ *ap;
232{
233 struct vnode *vp = ap->a_vp;
234 struct denode *dep = VTODE(vp);
235 struct timespec ts;
236
8a8d5d85 237 lwkt_gettoken(&vp->v_interlock);
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238 if (vp->v_usecount > 1) {
239 getnanotime(&ts);
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240 lwkt_regettoken(&vp->v_interlock);
241 if (vp->v_usecount > 1) {
242 DETIMES(dep, &ts, &ts, &ts);
243 }
984263bc 244 }
8a8d5d85 245 lwkt_reltoken(&vp->v_interlock);
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246 return 0;
247}
248
249static int
250msdosfs_access(ap)
251 struct vop_access_args /* {
252 struct vnode *a_vp;
253 int a_mode;
254 struct ucred *a_cred;
dadab5e9 255 struct thread *a_td;
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256 } */ *ap;
257{
258 struct vnode *vp = ap->a_vp;
259 struct denode *dep = VTODE(ap->a_vp);
260 struct msdosfsmount *pmp = dep->de_pmp;
261 struct ucred *cred = ap->a_cred;
262 mode_t mask, file_mode, mode = ap->a_mode;
263 register gid_t *gp;
264 int i;
265
266 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) |
267 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH));
268 file_mode &= pmp->pm_mask;
269
270 /*
271 * Disallow write attempts on read-only file systems;
272 * unless the file is a socket, fifo, or a block or
273 * character device resident on the file system.
274 */
275 if (mode & VWRITE) {
276 switch (vp->v_type) {
277 case VDIR:
278 case VLNK:
279 case VREG:
280 if (vp->v_mount->mnt_flag & MNT_RDONLY)
281 return (EROFS);
282 break;
283 default:
284 break;
285 }
286 }
287
288 /* User id 0 always gets access. */
289 if (cred->cr_uid == 0)
290 return 0;
291
292 mask = 0;
293
294 /* Otherwise, check the owner. */
295 if (cred->cr_uid == pmp->pm_uid) {
296 if (mode & VEXEC)
297 mask |= S_IXUSR;
298 if (mode & VREAD)
299 mask |= S_IRUSR;
300 if (mode & VWRITE)
301 mask |= S_IWUSR;
302 return (file_mode & mask) == mask ? 0 : EACCES;
303 }
304
305 /* Otherwise, check the groups. */
306 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
307 if (pmp->pm_gid == *gp) {
308 if (mode & VEXEC)
309 mask |= S_IXGRP;
310 if (mode & VREAD)
311 mask |= S_IRGRP;
312 if (mode & VWRITE)
313 mask |= S_IWGRP;
314 return (file_mode & mask) == mask ? 0 : EACCES;
315 }
316
317 /* Otherwise, check everyone else. */
318 if (mode & VEXEC)
319 mask |= S_IXOTH;
320 if (mode & VREAD)
321 mask |= S_IROTH;
322 if (mode & VWRITE)
323 mask |= S_IWOTH;
324 return (file_mode & mask) == mask ? 0 : EACCES;
325}
326
327static int
328msdosfs_getattr(ap)
329 struct vop_getattr_args /* {
330 struct vnode *a_vp;
331 struct vattr *a_vap;
332 struct ucred *a_cred;
dadab5e9 333 struct thread *a_td;
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334 } */ *ap;
335{
336 struct denode *dep = VTODE(ap->a_vp);
337 struct msdosfsmount *pmp = dep->de_pmp;
338 struct vattr *vap = ap->a_vap;
339 mode_t mode;
340 struct timespec ts;
341 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
342 u_long fileid;
343
344 getnanotime(&ts);
345 DETIMES(dep, &ts, &ts, &ts);
346 vap->va_fsid = dev2udev(dep->de_dev);
347 /*
348 * The following computation of the fileid must be the same as that
349 * used in msdosfs_readdir() to compute d_fileno. If not, pwd
350 * doesn't work.
351 */
352 if (dep->de_Attributes & ATTR_DIRECTORY) {
353 fileid = cntobn(pmp, dep->de_StartCluster) * dirsperblk;
354 if (dep->de_StartCluster == MSDOSFSROOT)
355 fileid = 1;
356 } else {
357 fileid = cntobn(pmp, dep->de_dirclust) * dirsperblk;
358 if (dep->de_dirclust == MSDOSFSROOT)
359 fileid = roottobn(pmp, 0) * dirsperblk;
360 fileid += dep->de_diroffset / sizeof(struct direntry);
361 }
362 vap->va_fileid = fileid;
363 if ((dep->de_Attributes & ATTR_READONLY) == 0)
364 mode = S_IRWXU|S_IRWXG|S_IRWXO;
365 else
366 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
367 vap->va_mode = mode & pmp->pm_mask;
368 vap->va_uid = pmp->pm_uid;
369 vap->va_gid = pmp->pm_gid;
370 vap->va_nlink = 1;
371 vap->va_rdev = 0;
372 vap->va_size = dep->de_FileSize;
373 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime);
374 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) {
375 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime);
376 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime);
377 } else {
378 vap->va_atime = vap->va_mtime;
379 vap->va_ctime = vap->va_mtime;
380 }
381 vap->va_flags = 0;
382 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0)
383 vap->va_flags |= SF_ARCHIVED;
384 vap->va_gen = 0;
385 vap->va_blocksize = pmp->pm_bpcluster;
386 vap->va_bytes =
387 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask;
388 vap->va_type = ap->a_vp->v_type;
389 vap->va_filerev = dep->de_modrev;
390 return (0);
391}
392
393static int
394msdosfs_setattr(ap)
395 struct vop_setattr_args /* {
396 struct vnode *a_vp;
397 struct vattr *a_vap;
398 struct ucred *a_cred;
dadab5e9 399 struct thread *a_td;
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400 } */ *ap;
401{
402 struct vnode *vp = ap->a_vp;
403 struct denode *dep = VTODE(ap->a_vp);
404 struct msdosfsmount *pmp = dep->de_pmp;
405 struct vattr *vap = ap->a_vap;
406 struct ucred *cred = ap->a_cred;
407 int error = 0;
408
409#ifdef MSDOSFS_DEBUG
410 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n",
dadab5e9 411 ap->a_vp, vap, cred, ap->a_td);
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412#endif
413
414 /*
415 * Check for unsettable attributes.
416 */
417 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
418 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
419 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
420 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
421#ifdef MSDOSFS_DEBUG
422 printf("msdosfs_setattr(): returning EINVAL\n");
423 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n",
424 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid);
425 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n",
426 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen);
427 printf(" va_uid %x, va_gid %x\n",
428 vap->va_uid, vap->va_gid);
429#endif
430 return (EINVAL);
431 }
432 if (vap->va_flags != VNOVAL) {
433 if (vp->v_mount->mnt_flag & MNT_RDONLY)
434 return (EROFS);
435 if (cred->cr_uid != pmp->pm_uid &&
dadab5e9 436 (error = suser_cred(cred, PRISON_ROOT)))
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437 return (error);
438 /*
439 * We are very inconsistent about handling unsupported
440 * attributes. We ignored the access time and the
441 * read and execute bits. We were strict for the other
442 * attributes.
443 *
444 * Here we are strict, stricter than ufs in not allowing
445 * users to attempt to set SF_SETTABLE bits or anyone to
446 * set unsupported bits. However, we ignore attempts to
447 * set ATTR_ARCHIVE for directories `cp -pr' from a more
448 * sensible file system attempts it a lot.
449 */
450 if (cred->cr_uid != 0) {
451 if (vap->va_flags & SF_SETTABLE)
452 return EPERM;
453 }
454 if (vap->va_flags & ~SF_ARCHIVED)
455 return EOPNOTSUPP;
456 if (vap->va_flags & SF_ARCHIVED)
457 dep->de_Attributes &= ~ATTR_ARCHIVE;
458 else if (!(dep->de_Attributes & ATTR_DIRECTORY))
459 dep->de_Attributes |= ATTR_ARCHIVE;
460 dep->de_flag |= DE_MODIFIED;
461 }
462
463 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
464 uid_t uid;
465 gid_t gid;
466
467 if (vp->v_mount->mnt_flag & MNT_RDONLY)
468 return (EROFS);
469 uid = vap->va_uid;
470 if (uid == (uid_t)VNOVAL)
471 uid = pmp->pm_uid;
472 gid = vap->va_gid;
473 if (gid == (gid_t)VNOVAL)
474 gid = pmp->pm_gid;
475 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid ||
476 (gid != pmp->pm_gid && !groupmember(gid, cred))) &&
dadab5e9 477 (error = suser_cred(cred, PRISON_ROOT)))
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478 return error;
479 if (uid != pmp->pm_uid || gid != pmp->pm_gid)
480 return EINVAL;
481 }
482
483 if (vap->va_size != VNOVAL) {
484 /*
485 * Disallow write attempts on read-only file systems;
486 * unless the file is a socket, fifo, or a block or
487 * character device resident on the file system.
488 */
489 switch (vp->v_type) {
490 case VDIR:
491 return (EISDIR);
492 /* NOT REACHED */
493 case VLNK:
494 case VREG:
495 if (vp->v_mount->mnt_flag & MNT_RDONLY)
496 return (EROFS);
497 break;
498 default:
499 break;
500 }
3b568787 501 error = detrunc(dep, vap->va_size, 0, ap->a_td);
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502 if (error)
503 return error;
504 }
505 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
506 if (vp->v_mount->mnt_flag & MNT_RDONLY)
507 return (EROFS);
508 if (cred->cr_uid != pmp->pm_uid &&
dadab5e9 509 (error = suser_cred(cred, PRISON_ROOT)) &&
984263bc 510 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
dadab5e9 511 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_td))))
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512 return (error);
513 if (vp->v_type != VDIR) {
514 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 &&
515 vap->va_atime.tv_sec != VNOVAL) {
516 dep->de_flag &= ~DE_ACCESS;
517 unix2dostime(&vap->va_atime, &dep->de_ADate,
518 NULL, NULL);
519 }
520 if (vap->va_mtime.tv_sec != VNOVAL) {
521 dep->de_flag &= ~DE_UPDATE;
522 unix2dostime(&vap->va_mtime, &dep->de_MDate,
523 &dep->de_MTime, NULL);
524 }
525 dep->de_Attributes |= ATTR_ARCHIVE;
526 dep->de_flag |= DE_MODIFIED;
527 }
528 }
529 /*
530 * DOS files only have the ability to have their writability
531 * attribute set, so we use the owner write bit to set the readonly
532 * attribute.
533 */
534 if (vap->va_mode != (mode_t)VNOVAL) {
535 if (vp->v_mount->mnt_flag & MNT_RDONLY)
536 return (EROFS);
537 if (cred->cr_uid != pmp->pm_uid &&
dadab5e9 538 (error = suser_cred(cred, PRISON_ROOT)))
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539 return (error);
540 if (vp->v_type != VDIR) {
541 /* We ignore the read and execute bits. */
542 if (vap->va_mode & VWRITE)
543 dep->de_Attributes &= ~ATTR_READONLY;
544 else
545 dep->de_Attributes |= ATTR_READONLY;
546 dep->de_Attributes |= ATTR_ARCHIVE;
547 dep->de_flag |= DE_MODIFIED;
548 }
549 }
550 return (deupdat(dep, 1));
551}
552
553static int
554msdosfs_read(ap)
555 struct vop_read_args /* {
556 struct vnode *a_vp;
557 struct uio *a_uio;
558 int a_ioflag;
559 struct ucred *a_cred;
560 } */ *ap;
561{
562 int error = 0;
563 int blsize;
564 int isadir;
565 int orig_resid;
566 u_int n;
567 u_long diff;
568 u_long on;
569 daddr_t lbn;
570 daddr_t rablock;
571 int rasize;
572 int seqcount;
573 struct buf *bp;
574 struct vnode *vp = ap->a_vp;
575 struct denode *dep = VTODE(vp);
576 struct msdosfsmount *pmp = dep->de_pmp;
577 struct uio *uio = ap->a_uio;
578
579 if (uio->uio_offset < 0)
580 return (EINVAL);
581
582 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX)
583 return (0);
584 /*
585 * If they didn't ask for any data, then we are done.
586 */
587 orig_resid = uio->uio_resid;
588 if (orig_resid <= 0)
589 return (0);
590
591 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
592
593 isadir = dep->de_Attributes & ATTR_DIRECTORY;
594 do {
595 if (uio->uio_offset >= dep->de_FileSize)
596 break;
597 lbn = de_cluster(pmp, uio->uio_offset);
598 /*
599 * If we are operating on a directory file then be sure to
600 * do i/o with the vnode for the filesystem instead of the
601 * vnode for the directory.
602 */
603 if (isadir) {
604 /* convert cluster # to block # */
605 error = pcbmap(dep, lbn, &lbn, 0, &blsize);
606 if (error == E2BIG) {
607 error = EINVAL;
608 break;
609 } else if (error)
610 break;
3b568787 611 error = bread(pmp->pm_devvp, lbn, blsize, &bp);
984263bc
MD
612 } else {
613 blsize = pmp->pm_bpcluster;
614 rablock = lbn + 1;
615 if (seqcount > 1 &&
616 de_cn2off(pmp, rablock) < dep->de_FileSize) {
617 rasize = pmp->pm_bpcluster;
618 error = breadn(vp, lbn, blsize,
3b568787 619 &rablock, &rasize, 1, &bp);
984263bc 620 } else {
3b568787 621 error = bread(vp, lbn, blsize, &bp);
984263bc
MD
622 }
623 }
624 if (error) {
625 brelse(bp);
626 break;
627 }
628 on = uio->uio_offset & pmp->pm_crbomask;
629 diff = pmp->pm_bpcluster - on;
630 n = diff > uio->uio_resid ? uio->uio_resid : diff;
631 diff = dep->de_FileSize - uio->uio_offset;
632 if (diff < n)
633 n = diff;
634 diff = blsize - bp->b_resid;
635 if (diff < n)
636 n = diff;
637 error = uiomove(bp->b_data + on, (int) n, uio);
638 brelse(bp);
639 } while (error == 0 && uio->uio_resid > 0 && n != 0);
640 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) &&
641 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0)
642 dep->de_flag |= DE_ACCESS;
643 return (error);
644}
645
646/*
647 * Write data to a file or directory.
648 */
649static int
650msdosfs_write(ap)
651 struct vop_write_args /* {
652 struct vnode *a_vp;
653 struct uio *a_uio;
654 int a_ioflag;
655 struct ucred *a_cred;
656 } */ *ap;
657{
658 int n;
659 int croffset;
660 int resid;
661 u_long osize;
662 int error = 0;
663 u_long count;
664 daddr_t bn, lastcn;
665 struct buf *bp;
666 int ioflag = ap->a_ioflag;
667 struct uio *uio = ap->a_uio;
dadab5e9 668 struct thread *td = uio->uio_td;
984263bc
MD
669 struct vnode *vp = ap->a_vp;
670 struct vnode *thisvp;
671 struct denode *dep = VTODE(vp);
672 struct msdosfsmount *pmp = dep->de_pmp;
dadab5e9 673 struct proc *p = td->td_proc;
984263bc
MD
674
675#ifdef MSDOSFS_DEBUG
676 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n",
677 vp, uio, ioflag, cred);
678 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n",
679 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster);
680#endif
681
682 switch (vp->v_type) {
683 case VREG:
684 if (ioflag & IO_APPEND)
685 uio->uio_offset = dep->de_FileSize;
686 thisvp = vp;
687 break;
688 case VDIR:
689 return EISDIR;
690 default:
691 panic("msdosfs_write(): bad file type");
692 }
693
694 if (uio->uio_offset < 0)
695 return (EFBIG);
696
697 if (uio->uio_resid == 0)
698 return (0);
699
700 /*
701 * If they've exceeded their filesize limit, tell them about it.
702 */
703 if (p &&
704 ((uoff_t)uio->uio_offset + uio->uio_resid >
705 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) {
706 psignal(p, SIGXFSZ);
707 return (EFBIG);
708 }
709
710 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX)
711 return (EFBIG);
712
713 /*
714 * If the offset we are starting the write at is beyond the end of
715 * the file, then they've done a seek. Unix filesystems allow
716 * files with holes in them, DOS doesn't so we must fill the hole
717 * with zeroed blocks.
718 */
719 if (uio->uio_offset > dep->de_FileSize) {
3b568787 720 error = deextend(dep, uio->uio_offset);
984263bc
MD
721 if (error)
722 return (error);
723 }
724
725 /*
726 * Remember some values in case the write fails.
727 */
728 resid = uio->uio_resid;
729 osize = dep->de_FileSize;
730
731 /*
732 * If we write beyond the end of the file, extend it to its ultimate
733 * size ahead of the time to hopefully get a contiguous area.
734 */
735 if (uio->uio_offset + resid > osize) {
736 count = de_clcount(pmp, uio->uio_offset + resid) -
737 de_clcount(pmp, osize);
738 error = extendfile(dep, count, NULL, NULL, 0);
739 if (error && (error != ENOSPC || (ioflag & IO_UNIT)))
740 goto errexit;
741 lastcn = dep->de_fc[FC_LASTFC].fc_frcn;
742 } else
743 lastcn = de_clcount(pmp, osize) - 1;
744
745 do {
746 if (de_cluster(pmp, uio->uio_offset) > lastcn) {
747 error = ENOSPC;
748 break;
749 }
750
751 croffset = uio->uio_offset & pmp->pm_crbomask;
752 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset);
753 if (uio->uio_offset + n > dep->de_FileSize) {
754 dep->de_FileSize = uio->uio_offset + n;
755 /* The object size needs to be set before buffer is allocated */
756 vnode_pager_setsize(vp, dep->de_FileSize);
757 }
758
759 bn = de_cluster(pmp, uio->uio_offset);
760 if ((uio->uio_offset & pmp->pm_crbomask) == 0
761 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid)
762 > de_cluster(pmp, uio->uio_offset)
763 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) {
764 /*
765 * If either the whole cluster gets written,
766 * or we write the cluster from its start beyond EOF,
767 * then no need to read data from disk.
768 */
769 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0);
770 clrbuf(bp);
771 /*
772 * Do the bmap now, since pcbmap needs buffers
773 * for the fat table. (see msdosfs_strategy)
774 */
775 if (bp->b_blkno == bp->b_lblkno) {
776 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno,
777 0, 0);
778 if (error)
779 bp->b_blkno = -1;
780 }
781 if (bp->b_blkno == -1) {
782 brelse(bp);
783 if (!error)
784 error = EIO; /* XXX */
785 break;
786 }
787 } else {
788 /*
789 * The block we need to write into exists, so read it in.
790 */
3b568787 791 error = bread(thisvp, bn, pmp->pm_bpcluster, &bp);
984263bc
MD
792 if (error) {
793 brelse(bp);
794 break;
795 }
796 }
797
798 /*
799 * Should these vnode_pager_* functions be done on dir
800 * files?
801 */
802
803 /*
804 * Copy the data from user space into the buf header.
805 */
806 error = uiomove(bp->b_data + croffset, n, uio);
807 if (error) {
808 brelse(bp);
809 break;
810 }
811
812 /*
813 * If they want this synchronous then write it and wait for
814 * it. Otherwise, if on a cluster boundary write it
815 * asynchronously so we can move on to the next block
816 * without delay. Otherwise do a delayed write because we
817 * may want to write somemore into the block later.
818 */
819 if (ioflag & IO_SYNC)
820 (void) bwrite(bp);
821 else if (n + croffset == pmp->pm_bpcluster)
822 bawrite(bp);
823 else
824 bdwrite(bp);
825 dep->de_flag |= DE_UPDATE;
826 } while (error == 0 && uio->uio_resid > 0);
827
828 /*
829 * If the write failed and they want us to, truncate the file back
830 * to the size it was before the write was attempted.
831 */
832errexit:
833 if (error) {
834 if (ioflag & IO_UNIT) {
3b568787 835 detrunc(dep, osize, ioflag & IO_SYNC, NULL);
984263bc
MD
836 uio->uio_offset -= resid - uio->uio_resid;
837 uio->uio_resid = resid;
838 } else {
3b568787 839 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NULL);
984263bc
MD
840 if (uio->uio_resid != resid)
841 error = 0;
842 }
843 } else if (ioflag & IO_SYNC)
844 error = deupdat(dep, 1);
845 return (error);
846}
847
848/*
849 * Flush the blocks of a file to disk.
850 *
851 * This function is worthless for vnodes that represent directories. Maybe we
852 * could just do a sync if they try an fsync on a directory file.
853 */
854static int
855msdosfs_fsync(ap)
856 struct vop_fsync_args /* {
857 struct vnode *a_vp;
858 struct ucred *a_cred;
859 int a_waitfor;
dadab5e9 860 struct thread *a_td;
984263bc
MD
861 } */ *ap;
862{
863 struct vnode *vp = ap->a_vp;
864 int s;
865 struct buf *bp, *nbp;
866
867 /*
868 * Flush all dirty buffers associated with a vnode.
869 */
870loop:
871 s = splbio();
872 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
873 nbp = TAILQ_NEXT(bp, b_vnbufs);
874 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
875 continue;
876 if ((bp->b_flags & B_DELWRI) == 0)
877 panic("msdosfs_fsync: not dirty");
878 bremfree(bp);
879 splx(s);
880 (void) bwrite(bp);
881 goto loop;
882 }
883 while (vp->v_numoutput) {
884 vp->v_flag |= VBWAIT;
885 (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "msdosfsn", 0);
886 }
887#ifdef DIAGNOSTIC
888 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd)) {
889 vprint("msdosfs_fsync: dirty", vp);
890 goto loop;
891 }
892#endif
893 splx(s);
894 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT));
895}
896
897static int
898msdosfs_remove(ap)
899 struct vop_remove_args /* {
900 struct vnode *a_dvp;
901 struct vnode *a_vp;
902 struct componentname *a_cnp;
903 } */ *ap;
904{
905 struct denode *dep = VTODE(ap->a_vp);
906 struct denode *ddep = VTODE(ap->a_dvp);
907 int error;
908
909 if (ap->a_vp->v_type == VDIR)
910 error = EPERM;
911 else
912 error = removede(ddep, dep);
913#ifdef MSDOSFS_DEBUG
914 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount);
915#endif
916 return (error);
917}
918
919/*
920 * DOS filesystems don't know what links are. But since we already called
921 * msdosfs_lookup() with create and lockparent, the parent is locked so we
922 * have to free it before we return the error.
923 */
924static int
925msdosfs_link(ap)
926 struct vop_link_args /* {
927 struct vnode *a_tdvp;
928 struct vnode *a_vp;
929 struct componentname *a_cnp;
930 } */ *ap;
931{
932 return (EOPNOTSUPP);
933}
934
935/*
936 * Renames on files require moving the denode to a new hash queue since the
937 * denode's location is used to compute which hash queue to put the file
938 * in. Unless it is a rename in place. For example "mv a b".
939 *
940 * What follows is the basic algorithm:
941 *
942 * if (file move) {
943 * if (dest file exists) {
944 * remove dest file
945 * }
946 * if (dest and src in same directory) {
947 * rewrite name in existing directory slot
948 * } else {
949 * write new entry in dest directory
950 * update offset and dirclust in denode
951 * move denode to new hash chain
952 * clear old directory entry
953 * }
954 * } else {
955 * directory move
956 * if (dest directory exists) {
957 * if (dest is not empty) {
958 * return ENOTEMPTY
959 * }
960 * remove dest directory
961 * }
962 * if (dest and src in same directory) {
963 * rewrite name in existing entry
964 * } else {
965 * be sure dest is not a child of src directory
966 * write entry in dest directory
967 * update "." and ".." in moved directory
968 * clear old directory entry for moved directory
969 * }
970 * }
971 *
972 * On entry:
973 * source's parent directory is unlocked
974 * source file or directory is unlocked
975 * destination's parent directory is locked
976 * destination file or directory is locked if it exists
977 *
978 * On exit:
979 * all denodes should be released
980 *
981 * Notes:
982 * I'm not sure how the memory containing the pathnames pointed at by the
983 * componentname structures is freed, there may be some memory bleeding
984 * for each rename done.
985 */
986static int
987msdosfs_rename(ap)
988 struct vop_rename_args /* {
989 struct vnode *a_fdvp;
990 struct vnode *a_fvp;
991 struct componentname *a_fcnp;
992 struct vnode *a_tdvp;
993 struct vnode *a_tvp;
994 struct componentname *a_tcnp;
995 } */ *ap;
996{
997 struct vnode *tdvp = ap->a_tdvp;
998 struct vnode *fvp = ap->a_fvp;
999 struct vnode *fdvp = ap->a_fdvp;
1000 struct vnode *tvp = ap->a_tvp;
1001 struct componentname *tcnp = ap->a_tcnp;
1002 struct componentname *fcnp = ap->a_fcnp;
dadab5e9 1003 struct thread *td = fcnp->cn_td;
984263bc
MD
1004 struct denode *ip, *xp, *dp, *zp;
1005 u_char toname[11], oldname[11];
1006 u_long from_diroffset, to_diroffset;
1007 u_char to_count;
1008 int doingdirectory = 0, newparent = 0;
1009 int error;
1010 u_long cn;
1011 daddr_t bn;
1012 struct denode *fddep; /* from file's parent directory */
1013 struct msdosfsmount *pmp;
1014 struct direntry *dotdotp;
1015 struct buf *bp;
1016
1017 fddep = VTODE(ap->a_fdvp);
1018 pmp = fddep->de_pmp;
1019
1020 pmp = VFSTOMSDOSFS(fdvp->v_mount);
1021
1022#ifdef DIAGNOSTIC
1023 if ((tcnp->cn_flags & HASBUF) == 0 ||
1024 (fcnp->cn_flags & HASBUF) == 0)
1025 panic("msdosfs_rename: no name");
1026#endif
1027 /*
1028 * Check for cross-device rename.
1029 */
1030 if ((fvp->v_mount != tdvp->v_mount) ||
1031 (tvp && (fvp->v_mount != tvp->v_mount))) {
1032 error = EXDEV;
1033abortit:
1034 if (tdvp == tvp)
1035 vrele(tdvp);
1036 else
1037 vput(tdvp);
1038 if (tvp)
1039 vput(tvp);
1040 vrele(fdvp);
1041 vrele(fvp);
1042 return (error);
1043 }
1044
1045 /*
1046 * If source and dest are the same, do nothing.
1047 */
1048 if (tvp == fvp) {
1049 error = 0;
1050 goto abortit;
1051 }
1052
dadab5e9 1053 error = vn_lock(fvp, LK_EXCLUSIVE, td);
984263bc
MD
1054 if (error)
1055 goto abortit;
1056 dp = VTODE(fdvp);
1057 ip = VTODE(fvp);
1058
1059 /*
1060 * Be sure we are not renaming ".", "..", or an alias of ".". This
1061 * leads to a crippled directory tree. It's pretty tough to do a
1062 * "ls" or "pwd" with the "." directory entry missing, and "cd .."
1063 * doesn't work if the ".." entry is missing.
1064 */
1065 if (ip->de_Attributes & ATTR_DIRECTORY) {
1066 /*
1067 * Avoid ".", "..", and aliases of "." for obvious reasons.
1068 */
1069 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
1070 dp == ip ||
1071 (fcnp->cn_flags & ISDOTDOT) ||
1072 (tcnp->cn_flags & ISDOTDOT) ||
1073 (ip->de_flag & DE_RENAME)) {
dadab5e9 1074 VOP_UNLOCK(fvp, 0, td);
984263bc
MD
1075 error = EINVAL;
1076 goto abortit;
1077 }
1078 ip->de_flag |= DE_RENAME;
1079 doingdirectory++;
1080 }
1081
1082 /*
1083 * When the target exists, both the directory
1084 * and target vnodes are returned locked.
1085 */
1086 dp = VTODE(tdvp);
1087 xp = tvp ? VTODE(tvp) : NULL;
1088 /*
1089 * Remember direntry place to use for destination
1090 */
1091 to_diroffset = dp->de_fndoffset;
1092 to_count = dp->de_fndcnt;
1093
1094 /*
1095 * If ".." must be changed (ie the directory gets a new
1096 * parent) then the source directory must not be in the
1097 * directory heirarchy above the target, as this would
1098 * orphan everything below the source directory. Also
1099 * the user must have write permission in the source so
1100 * as to be able to change "..". We must repeat the call
1101 * to namei, as the parent directory is unlocked by the
1102 * call to doscheckpath().
1103 */
dadab5e9
MD
1104 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_td);
1105 VOP_UNLOCK(fvp, 0, td);
984263bc
MD
1106 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster)
1107 newparent = 1;
1108 if (doingdirectory && newparent) {
1109 if (error) /* write access check above */
1110 goto bad;
1111 if (xp != NULL)
1112 vput(tvp);
1113 /*
1114 * doscheckpath() vput()'s dp,
1115 * so we have to do a relookup afterwards
1116 */
1117 error = doscheckpath(ip, dp);
1118 if (error)
1119 goto out;
1120 if ((tcnp->cn_flags & SAVESTART) == 0)
1121 panic("msdosfs_rename: lost to startdir");
1122 error = relookup(tdvp, &tvp, tcnp);
1123 if (error)
1124 goto out;
1125 dp = VTODE(tdvp);
1126 xp = tvp ? VTODE(tvp) : NULL;
1127 }
1128
1129 if (xp != NULL) {
1130 /*
1131 * Target must be empty if a directory and have no links
1132 * to it. Also, ensure source and target are compatible
1133 * (both directories, or both not directories).
1134 */
1135 if (xp->de_Attributes & ATTR_DIRECTORY) {
1136 if (!dosdirempty(xp)) {
1137 error = ENOTEMPTY;
1138 goto bad;
1139 }
1140 if (!doingdirectory) {
1141 error = ENOTDIR;
1142 goto bad;
1143 }
1144 cache_purge(tdvp);
1145 } else if (doingdirectory) {
1146 error = EISDIR;
1147 goto bad;
1148 }
1149 error = removede(dp, xp);
1150 if (error)
1151 goto bad;
1152 vput(tvp);
1153 xp = NULL;
1154 }
1155
1156 /*
1157 * Convert the filename in tcnp into a dos filename. We copy this
1158 * into the denode and directory entry for the destination
1159 * file/directory.
1160 */
1161 error = uniqdosname(VTODE(tdvp), tcnp, toname);
1162 if (error)
1163 goto abortit;
1164
1165 /*
1166 * Since from wasn't locked at various places above,
1167 * have to do a relookup here.
1168 */
1169 fcnp->cn_flags &= ~MODMASK;
1170 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
1171 if ((fcnp->cn_flags & SAVESTART) == 0)
1172 panic("msdosfs_rename: lost from startdir");
1173 if (!newparent)
dadab5e9 1174 VOP_UNLOCK(tdvp, 0, td);
984263bc
MD
1175 if (relookup(fdvp, &fvp, fcnp) == 0)
1176 vrele(fdvp);
1177 if (fvp == NULL) {
1178 /*
1179 * From name has disappeared.
1180 */
1181 if (doingdirectory)
1182 panic("rename: lost dir entry");
1183 vrele(ap->a_fvp);
1184 if (newparent)
dadab5e9 1185 VOP_UNLOCK(tdvp, 0, td);
984263bc
MD
1186 vrele(tdvp);
1187 return 0;
1188 }
1189 xp = VTODE(fvp);
1190 zp = VTODE(fdvp);
1191 from_diroffset = zp->de_fndoffset;
1192
1193 /*
1194 * Ensure that the directory entry still exists and has not
1195 * changed till now. If the source is a file the entry may
1196 * have been unlinked or renamed. In either case there is
1197 * no further work to be done. If the source is a directory
1198 * then it cannot have been rmdir'ed or renamed; this is
1199 * prohibited by the DE_RENAME flag.
1200 */
1201 if (xp != ip) {
1202 if (doingdirectory)
1203 panic("rename: lost dir entry");
1204 vrele(ap->a_fvp);
dadab5e9 1205 VOP_UNLOCK(fvp, 0, td);
984263bc 1206 if (newparent)
dadab5e9 1207 VOP_UNLOCK(fdvp, 0, td);
984263bc
MD
1208 xp = NULL;
1209 } else {
1210 vrele(fvp);
1211 xp = NULL;
1212
1213 /*
1214 * First write a new entry in the destination
1215 * directory and mark the entry in the source directory
1216 * as deleted. Then move the denode to the correct hash
1217 * chain for its new location in the filesystem. And, if
1218 * we moved a directory, then update its .. entry to point
1219 * to the new parent directory.
1220 */
1221 bcopy(ip->de_Name, oldname, 11);
1222 bcopy(toname, ip->de_Name, 11); /* update denode */
1223 dp->de_fndoffset = to_diroffset;
1224 dp->de_fndcnt = to_count;
1225 error = createde(ip, dp, (struct denode **)0, tcnp);
1226 if (error) {
1227 bcopy(oldname, ip->de_Name, 11);
1228 if (newparent)
dadab5e9
MD
1229 VOP_UNLOCK(fdvp, 0, td);
1230 VOP_UNLOCK(fvp, 0, td);
984263bc
MD
1231 goto bad;
1232 }
1233 ip->de_refcnt++;
1234 zp->de_fndoffset = from_diroffset;
1235 error = removede(zp, ip);
1236 if (error) {
1237 /* XXX should really panic here, fs is corrupt */
1238 if (newparent)
dadab5e9
MD
1239 VOP_UNLOCK(fdvp, 0, td);
1240 VOP_UNLOCK(fvp, 0, td);
984263bc
MD
1241 goto bad;
1242 }
1243 if (!doingdirectory) {
1244 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0,
1245 &ip->de_dirclust, 0);
1246 if (error) {
1247 /* XXX should really panic here, fs is corrupt */
1248 if (newparent)
dadab5e9
MD
1249 VOP_UNLOCK(fdvp, 0, td);
1250 VOP_UNLOCK(fvp, 0, td);
984263bc
MD
1251 goto bad;
1252 }
1253 if (ip->de_dirclust == MSDOSFSROOT)
1254 ip->de_diroffset = to_diroffset;
1255 else
1256 ip->de_diroffset = to_diroffset & pmp->pm_crbomask;
1257 }
1258 reinsert(ip);
1259 if (newparent)
dadab5e9 1260 VOP_UNLOCK(fdvp, 0, td);
984263bc
MD
1261 }
1262
1263 /*
1264 * If we moved a directory to a new parent directory, then we must
1265 * fixup the ".." entry in the moved directory.
1266 */
1267 if (doingdirectory && newparent) {
1268 cn = ip->de_StartCluster;
1269 if (cn == MSDOSFSROOT) {
1270 /* this should never happen */
1271 panic("msdosfs_rename(): updating .. in root directory?");
1272 } else
1273 bn = cntobn(pmp, cn);
3b568787 1274 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, &bp);
984263bc
MD
1275 if (error) {
1276 /* XXX should really panic here, fs is corrupt */
1277 brelse(bp);
dadab5e9 1278 VOP_UNLOCK(fvp, 0, td);
984263bc
MD
1279 goto bad;
1280 }
1281 dotdotp = (struct direntry *)bp->b_data + 1;
1282 putushort(dotdotp->deStartCluster, dp->de_StartCluster);
1283 if (FAT32(pmp))
1284 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16);
1285 error = bwrite(bp);
1286 if (error) {
1287 /* XXX should really panic here, fs is corrupt */
dadab5e9 1288 VOP_UNLOCK(fvp, 0, td);
984263bc
MD
1289 goto bad;
1290 }
1291 }
1292
dadab5e9 1293 VOP_UNLOCK(fvp, 0, td);
984263bc
MD
1294bad:
1295 if (xp)
1296 vput(tvp);
1297 vput(tdvp);
1298out:
1299 ip->de_flag &= ~DE_RENAME;
1300 vrele(fdvp);
1301 vrele(fvp);
1302 return (error);
1303
1304}
1305
1306static struct {
1307 struct direntry dot;
1308 struct direntry dotdot;
1309} dosdirtemplate = {
1310 { ". ", " ", /* the . entry */
1311 ATTR_DIRECTORY, /* file attribute */
1312 0, /* reserved */
1313 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1314 { 0, 0 }, /* access date */
1315 { 0, 0 }, /* high bits of start cluster */
1316 { 210, 4 }, { 210, 4 }, /* modify time & date */
1317 { 0, 0 }, /* startcluster */
1318 { 0, 0, 0, 0 } /* filesize */
1319 },
1320 { ".. ", " ", /* the .. entry */
1321 ATTR_DIRECTORY, /* file attribute */
1322 0, /* reserved */
1323 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1324 { 0, 0 }, /* access date */
1325 { 0, 0 }, /* high bits of start cluster */
1326 { 210, 4 }, { 210, 4 }, /* modify time & date */
1327 { 0, 0 }, /* startcluster */
1328 { 0, 0, 0, 0 } /* filesize */
1329 }
1330};
1331
1332static int
1333msdosfs_mkdir(ap)
1334 struct vop_mkdir_args /* {
1335 struct vnode *a_dvp;
1336 struvt vnode **a_vpp;
1337 struvt componentname *a_cnp;
1338 struct vattr *a_vap;
1339 } */ *ap;
1340{
1341 struct componentname *cnp = ap->a_cnp;
1342 struct denode *dep;
1343 struct denode *pdep = VTODE(ap->a_dvp);
1344 struct direntry *denp;
1345 struct msdosfsmount *pmp = pdep->de_pmp;
1346 struct buf *bp;
1347 u_long newcluster, pcl;
1348 int bn;
1349 int error;
1350 struct denode ndirent;
1351 struct timespec ts;
1352
1353 /*
1354 * If this is the root directory and there is no space left we
1355 * can't do anything. This is because the root directory can not
1356 * change size.
1357 */
1358 if (pdep->de_StartCluster == MSDOSFSROOT
1359 && pdep->de_fndoffset >= pdep->de_FileSize) {
1360 error = ENOSPC;
1361 goto bad2;
1362 }
1363
1364 /*
1365 * Allocate a cluster to hold the about to be created directory.
1366 */
1367 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL);
1368 if (error)
1369 goto bad2;
1370
1371 bzero(&ndirent, sizeof(ndirent));
1372 ndirent.de_pmp = pmp;
1373 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
1374 getnanotime(&ts);
1375 DETIMES(&ndirent, &ts, &ts, &ts);
1376
1377 /*
1378 * Now fill the cluster with the "." and ".." entries. And write
1379 * the cluster to disk. This way it is there for the parent
1380 * directory to be pointing at if there were a crash.
1381 */
1382 bn = cntobn(pmp, newcluster);
1383 /* always succeeds */
1384 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0);
1385 bzero(bp->b_data, pmp->pm_bpcluster);
1386 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate);
1387 denp = (struct direntry *)bp->b_data;
1388 putushort(denp[0].deStartCluster, newcluster);
1389 putushort(denp[0].deCDate, ndirent.de_CDate);
1390 putushort(denp[0].deCTime, ndirent.de_CTime);
1391 denp[0].deCHundredth = ndirent.de_CHun;
1392 putushort(denp[0].deADate, ndirent.de_ADate);
1393 putushort(denp[0].deMDate, ndirent.de_MDate);
1394 putushort(denp[0].deMTime, ndirent.de_MTime);
1395 pcl = pdep->de_StartCluster;
1396 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk)
1397 pcl = 0;
1398 putushort(denp[1].deStartCluster, pcl);
1399 putushort(denp[1].deCDate, ndirent.de_CDate);
1400 putushort(denp[1].deCTime, ndirent.de_CTime);
1401 denp[1].deCHundredth = ndirent.de_CHun;
1402 putushort(denp[1].deADate, ndirent.de_ADate);
1403 putushort(denp[1].deMDate, ndirent.de_MDate);
1404 putushort(denp[1].deMTime, ndirent.de_MTime);
1405 if (FAT32(pmp)) {
1406 putushort(denp[0].deHighClust, newcluster >> 16);
1407 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16);
1408 }
1409
1410 error = bwrite(bp);
1411 if (error)
1412 goto bad;
1413
1414 /*
1415 * Now build up a directory entry pointing to the newly allocated
1416 * cluster. This will be written to an empty slot in the parent
1417 * directory.
1418 */
1419#ifdef DIAGNOSTIC
1420 if ((cnp->cn_flags & HASBUF) == 0)
1421 panic("msdosfs_mkdir: no name");
1422#endif
1423 error = uniqdosname(pdep, cnp, ndirent.de_Name);
1424 if (error)
1425 goto bad;
1426
1427 ndirent.de_Attributes = ATTR_DIRECTORY;
1428 ndirent.de_LowerCase = 0;
1429 ndirent.de_StartCluster = newcluster;
1430 ndirent.de_FileSize = 0;
1431 ndirent.de_dev = pdep->de_dev;
1432 ndirent.de_devvp = pdep->de_devvp;
1433 error = createde(&ndirent, pdep, &dep, cnp);
1434 if (error)
1435 goto bad;
1436 *ap->a_vpp = DETOV(dep);
1437 return (0);
1438
1439bad:
1440 clusterfree(pmp, newcluster, NULL);
1441bad2:
1442 return (error);
1443}
1444
1445static int
1446msdosfs_rmdir(ap)
1447 struct vop_rmdir_args /* {
1448 struct vnode *a_dvp;
1449 struct vnode *a_vp;
1450 struct componentname *a_cnp;
1451 } */ *ap;
1452{
dadab5e9
MD
1453 struct vnode *vp = ap->a_vp;
1454 struct vnode *dvp = ap->a_dvp;
1455 struct componentname *cnp = ap->a_cnp;
1456 struct denode *ip, *dp;
1457 struct thread *td = cnp->cn_td;
984263bc
MD
1458 int error;
1459
1460 ip = VTODE(vp);
1461 dp = VTODE(dvp);
1462
1463 /*
1464 * Verify the directory is empty (and valid).
1465 * (Rmdir ".." won't be valid since
1466 * ".." will contain a reference to
1467 * the current directory and thus be
1468 * non-empty.)
1469 */
1470 error = 0;
1471 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) {
1472 error = ENOTEMPTY;
1473 goto out;
1474 }
1475 /*
1476 * Delete the entry from the directory. For dos filesystems this
1477 * gets rid of the directory entry on disk, the in memory copy
1478 * still exists but the de_refcnt is <= 0. This prevents it from
1479 * being found by deget(). When the vput() on dep is done we give
1480 * up access and eventually msdosfs_reclaim() will be called which
1481 * will remove it from the denode cache.
1482 */
1483 error = removede(dp, ip);
1484 if (error)
1485 goto out;
1486 /*
1487 * This is where we decrement the link count in the parent
1488 * directory. Since dos filesystems don't do this we just purge
1489 * the name cache.
1490 */
1491 cache_purge(dvp);
dadab5e9 1492 VOP_UNLOCK(dvp, 0, td);
984263bc
MD
1493 /*
1494 * Truncate the directory that is being deleted.
1495 */
3b568787 1496 error = detrunc(ip, (u_long)0, IO_SYNC, td);
984263bc
MD
1497 cache_purge(vp);
1498
dadab5e9 1499 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
1500out:
1501 return (error);
1502}
1503
1504/*
1505 * DOS filesystems don't know what symlinks are.
1506 */
1507static int
1508msdosfs_symlink(ap)
1509 struct vop_symlink_args /* {
1510 struct vnode *a_dvp;
1511 struct vnode **a_vpp;
1512 struct componentname *a_cnp;
1513 struct vattr *a_vap;
1514 char *a_target;
1515 } */ *ap;
1516{
1517 return (EOPNOTSUPP);
1518}
1519
1520static int
1521msdosfs_readdir(ap)
1522 struct vop_readdir_args /* {
1523 struct vnode *a_vp;
1524 struct uio *a_uio;
1525 struct ucred *a_cred;
1526 int *a_eofflag;
1527 int *a_ncookies;
1528 u_long **a_cookies;
1529 } */ *ap;
1530{
1531 int error = 0;
1532 int diff;
1533 long n;
1534 int blsize;
1535 long on;
1536 u_long cn;
1537 u_long fileno;
1538 u_long dirsperblk;
1539 long bias = 0;
1540 daddr_t bn, lbn;
1541 struct buf *bp;
1542 struct denode *dep = VTODE(ap->a_vp);
1543 struct msdosfsmount *pmp = dep->de_pmp;
1544 struct direntry *dentp;
1545 struct dirent dirbuf;
1546 struct uio *uio = ap->a_uio;
1547 u_long *cookies = NULL;
1548 int ncookies = 0;
1549 off_t offset, off;
1550 int chksum = -1;
1551
1552#ifdef MSDOSFS_DEBUG
1553 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n",
1554 ap->a_vp, uio, ap->a_cred, ap->a_eofflag);
1555#endif
1556
1557 /*
1558 * msdosfs_readdir() won't operate properly on regular files since
1559 * it does i/o only with the the filesystem vnode, and hence can
1560 * retrieve the wrong block from the buffer cache for a plain file.
1561 * So, fail attempts to readdir() on a plain file.
1562 */
1563 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0)
1564 return (ENOTDIR);
1565
1566 /*
1567 * To be safe, initialize dirbuf
1568 */
1569 bzero(dirbuf.d_name, sizeof(dirbuf.d_name));
1570
1571 /*
1572 * If the user buffer is smaller than the size of one dos directory
1573 * entry or the file offset is not a multiple of the size of a
1574 * directory entry, then we fail the read.
1575 */
1576 off = offset = uio->uio_offset;
1577 if (uio->uio_resid < sizeof(struct direntry) ||
1578 (offset & (sizeof(struct direntry) - 1)))
1579 return (EINVAL);
1580
1581 if (ap->a_ncookies) {
1582 ncookies = uio->uio_resid / 16;
1583 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP,
1584 M_WAITOK);
1585 *ap->a_cookies = cookies;
1586 *ap->a_ncookies = ncookies;
1587 }
1588
1589 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
1590
1591 /*
1592 * If they are reading from the root directory then, we simulate
1593 * the . and .. entries since these don't exist in the root
1594 * directory. We also set the offset bias to make up for having to
1595 * simulate these entries. By this I mean that at file offset 64 we
1596 * read the first entry in the root directory that lives on disk.
1597 */
1598 if (dep->de_StartCluster == MSDOSFSROOT
1599 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) {
1600#if 0
1601 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n",
1602 offset);
1603#endif
1604 bias = 2 * sizeof(struct direntry);
1605 if (offset < bias) {
1606 for (n = (int)offset / sizeof(struct direntry);
1607 n < 2; n++) {
1608 if (FAT32(pmp))
1609 dirbuf.d_fileno = cntobn(pmp,
1610 pmp->pm_rootdirblk)
1611 * dirsperblk;
1612 else
1613 dirbuf.d_fileno = 1;
1614 dirbuf.d_type = DT_DIR;
1615 switch (n) {
1616 case 0:
1617 dirbuf.d_namlen = 1;
1618 strcpy(dirbuf.d_name, ".");
1619 break;
1620 case 1:
1621 dirbuf.d_namlen = 2;
1622 strcpy(dirbuf.d_name, "..");
1623 break;
1624 }
1625 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf);
1626 if (uio->uio_resid < dirbuf.d_reclen)
1627 goto out;
1628 error = uiomove((caddr_t) &dirbuf,
1629 dirbuf.d_reclen, uio);
1630 if (error)
1631 goto out;
1632 offset += sizeof(struct direntry);
1633 off = offset;
1634 if (cookies) {
1635 *cookies++ = offset;
1636 if (--ncookies <= 0)
1637 goto out;
1638 }
1639 }
1640 }
1641 }
1642
1643 off = offset;
1644 while (uio->uio_resid > 0) {
1645 lbn = de_cluster(pmp, offset - bias);
1646 on = (offset - bias) & pmp->pm_crbomask;
1647 n = min(pmp->pm_bpcluster - on, uio->uio_resid);
1648 diff = dep->de_FileSize - (offset - bias);
1649 if (diff <= 0)
1650 break;
1651 n = min(n, diff);
1652 error = pcbmap(dep, lbn, &bn, &cn, &blsize);
1653 if (error)
1654 break;
3b568787 1655 error = bread(pmp->pm_devvp, bn, blsize, &bp);
984263bc
MD
1656 if (error) {
1657 brelse(bp);
1658 return (error);
1659 }
1660 n = min(n, blsize - bp->b_resid);
1661
1662 /*
1663 * Convert from dos directory entries to fs-independent
1664 * directory entries.
1665 */
1666 for (dentp = (struct direntry *)(bp->b_data + on);
1667 (char *)dentp < bp->b_data + on + n;
1668 dentp++, offset += sizeof(struct direntry)) {
1669#if 0
1670 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n",
1671 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes);
1672#endif
1673 /*
1674 * If this is an unused entry, we can stop.
1675 */
1676 if (dentp->deName[0] == SLOT_EMPTY) {
1677 brelse(bp);
1678 goto out;
1679 }
1680 /*
1681 * Skip deleted entries.
1682 */
1683 if (dentp->deName[0] == SLOT_DELETED) {
1684 chksum = -1;
1685 continue;
1686 }
1687
1688 /*
1689 * Handle Win95 long directory entries
1690 */
1691 if (dentp->deAttributes == ATTR_WIN95) {
1692 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME)
1693 continue;
1694 chksum = win2unixfn((struct winentry *)dentp,
1695 &dirbuf, chksum,
1696 pmp->pm_flags & MSDOSFSMNT_U2WTABLE,
1697 pmp->pm_u2w);
1698 continue;
1699 }
1700
1701 /*
1702 * Skip volume labels
1703 */
1704 if (dentp->deAttributes & ATTR_VOLUME) {
1705 chksum = -1;
1706 continue;
1707 }
1708 /*
1709 * This computation of d_fileno must match
1710 * the computation of va_fileid in
1711 * msdosfs_getattr.
1712 */
1713 if (dentp->deAttributes & ATTR_DIRECTORY) {
1714 fileno = getushort(dentp->deStartCluster);
1715 if (FAT32(pmp))
1716 fileno |= getushort(dentp->deHighClust) << 16;
1717 /* if this is the root directory */
1718 if (fileno == MSDOSFSROOT)
1719 if (FAT32(pmp))
1720 fileno = cntobn(pmp,
1721 pmp->pm_rootdirblk)
1722 * dirsperblk;
1723 else
1724 fileno = 1;
1725 else
1726 fileno = cntobn(pmp, fileno) * dirsperblk;
1727 dirbuf.d_fileno = fileno;
1728 dirbuf.d_type = DT_DIR;
1729 } else {
1730 dirbuf.d_fileno = offset / sizeof(struct direntry);
1731 dirbuf.d_type = DT_REG;
1732 }
1733 if (chksum != winChksum(dentp->deName))
1734 dirbuf.d_namlen = dos2unixfn(dentp->deName,
1735 (u_char *)dirbuf.d_name,
1736 dentp->deLowerCase |
1737 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ?
1738 (LCASE_BASE | LCASE_EXT) : 0),
1739 pmp->pm_flags & MSDOSFSMNT_U2WTABLE,
1740 pmp->pm_d2u,
1741 pmp->pm_flags & MSDOSFSMNT_ULTABLE,
1742 pmp->pm_ul);
1743 else
1744 dirbuf.d_name[dirbuf.d_namlen] = 0;
1745 chksum = -1;
1746 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf);
1747 if (uio->uio_resid < dirbuf.d_reclen) {
1748 brelse(bp);
1749 goto out;
1750 }
1751 error = uiomove((caddr_t) &dirbuf,
1752 dirbuf.d_reclen, uio);
1753 if (error) {
1754 brelse(bp);
1755 goto out;
1756 }
1757 if (cookies) {
1758 *cookies++ = offset + sizeof(struct direntry);
1759 if (--ncookies <= 0) {
1760 brelse(bp);
1761 goto out;
1762 }
1763 }
1764 off = offset + sizeof(struct direntry);
1765 }
1766 brelse(bp);
1767 }
1768out:
1769 /* Subtract unused cookies */
1770 if (ap->a_ncookies)
1771 *ap->a_ncookies -= ncookies;
1772
1773 uio->uio_offset = off;
1774
1775 /*
1776 * Set the eofflag (NFS uses it)
1777 */
1778 if (ap->a_eofflag) {
1779 if (dep->de_FileSize - (offset - bias) <= 0)
1780 *ap->a_eofflag = 1;
1781 else
1782 *ap->a_eofflag = 0;
1783 }
1784 return (error);
1785}
1786
1787/*
1788 * vp - address of vnode file the file
1789 * bn - which cluster we are interested in mapping to a filesystem block number.
1790 * vpp - returns the vnode for the block special file holding the filesystem
1791 * containing the file of interest
1792 * bnp - address of where to return the filesystem relative block number
1793 */
1794static int
1795msdosfs_bmap(ap)
1796 struct vop_bmap_args /* {
1797 struct vnode *a_vp;
1798 daddr_t a_bn;
1799 struct vnode **a_vpp;
1800 daddr_t *a_bnp;
1801 int *a_runp;
1802 int *a_runb;
1803 } */ *ap;
1804{
1805 struct denode *dep = VTODE(ap->a_vp);
1806
1807 if (ap->a_vpp != NULL)
1808 *ap->a_vpp = dep->de_devvp;
1809 if (ap->a_bnp == NULL)
1810 return (0);
1811 if (ap->a_runp) {
1812 /*
1813 * Sequential clusters should be counted here.
1814 */
1815 *ap->a_runp = 0;
1816 }
1817 if (ap->a_runb) {
1818 *ap->a_runb = 0;
1819 }
1820 return (pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0));
1821}
1822
1823static int
1824msdosfs_strategy(ap)
1825 struct vop_strategy_args /* {
1826 struct vnode *a_vp;
1827 struct buf *a_bp;
1828 } */ *ap;
1829{
1830 struct buf *bp = ap->a_bp;
1831 struct denode *dep = VTODE(bp->b_vp);
1832 struct vnode *vp;
1833 int error = 0;
1834
1835 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR)
1836 panic("msdosfs_strategy: spec");
1837 /*
1838 * If we don't already know the filesystem relative block number
1839 * then get it using pcbmap(). If pcbmap() returns the block
1840 * number as -1 then we've got a hole in the file. DOS filesystems
1841 * don't allow files with holes, so we shouldn't ever see this.
1842 */
1843 if (bp->b_blkno == bp->b_lblkno) {
1844 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 0, 0);
1845 if (error) {
1846 bp->b_error = error;
1847 bp->b_flags |= B_ERROR;
1848 biodone(bp);
1849 return (error);
1850 }
1851 if ((long)bp->b_blkno == -1)
1852 vfs_bio_clrbuf(bp);
1853 }
1854 if (bp->b_blkno == -1) {
1855 biodone(bp);
1856 return (0);
1857 }
1858 /*
1859 * Read/write the block from/to the disk that contains the desired
1860 * file block.
1861 */
1862 vp = dep->de_devvp;
1863 bp->b_dev = vp->v_rdev;
1864 VOP_STRATEGY(vp, bp);
1865 return (0);
1866}
1867
1868static int
1869msdosfs_print(ap)
1870 struct vop_print_args /* {
1871 struct vnode *vp;
1872 } */ *ap;
1873{
1874 struct denode *dep = VTODE(ap->a_vp);
1875
1876 printf(
1877 "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ",
1878 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset);
1879 printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev));
1880 lockmgr_printinfo(&dep->de_lock);
1881 printf("\n");
1882 return (0);
1883}
1884
1885static int
1886msdosfs_pathconf(ap)
1887 struct vop_pathconf_args /* {
1888 struct vnode *a_vp;
1889 int a_name;
1890 int *a_retval;
1891 } */ *ap;
1892{
1893 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp;
1894
1895 switch (ap->a_name) {
1896 case _PC_LINK_MAX:
1897 *ap->a_retval = 1;
1898 return (0);
1899 case _PC_NAME_MAX:
1900 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12;
1901 return (0);
1902 case _PC_PATH_MAX:
1903 *ap->a_retval = PATH_MAX;
1904 return (0);
1905 case _PC_CHOWN_RESTRICTED:
1906 *ap->a_retval = 1;
1907 return (0);
1908 case _PC_NO_TRUNC:
1909 *ap->a_retval = 0;
1910 return (0);
1911 default:
1912 return (EINVAL);
1913 }
1914 /* NOTREACHED */
1915}
1916
1917/*
1918 * get page routine
1919 *
1920 * XXX By default, wimp out... note that a_offset is ignored (and always
1921 * XXX has been).
1922 */
1923int
1924msdosfs_getpages(ap)
1925 struct vop_getpages_args *ap;
1926{
1927 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
1928 ap->a_reqpage);
1929}
1930
1931/*
1932 * put page routine
1933 *
1934 * XXX By default, wimp out... note that a_offset is ignored (and always
1935 * XXX has been).
1936 */
1937int
1938msdosfs_putpages(ap)
1939 struct vop_putpages_args *ap;
1940{
1941 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
1942 ap->a_sync, ap->a_rtvals);
1943}
1944
1945/* Global vfs data structures for msdosfs */
1946vop_t **msdosfs_vnodeop_p;
1947static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = {
1948 { &vop_default_desc, (vop_t *) vop_defaultop },
1949 { &vop_access_desc, (vop_t *) msdosfs_access },
1950 { &vop_bmap_desc, (vop_t *) msdosfs_bmap },
1951 { &vop_cachedlookup_desc, (vop_t *) msdosfs_lookup },
1952 { &vop_close_desc, (vop_t *) msdosfs_close },
1953 { &vop_create_desc, (vop_t *) msdosfs_create },
1954 { &vop_fsync_desc, (vop_t *) msdosfs_fsync },
1955 { &vop_getattr_desc, (vop_t *) msdosfs_getattr },
1956 { &vop_inactive_desc, (vop_t *) msdosfs_inactive },
1957 { &vop_islocked_desc, (vop_t *) vop_stdislocked },
1958 { &vop_link_desc, (vop_t *) msdosfs_link },
1959 { &vop_lock_desc, (vop_t *) vop_stdlock },
1960 { &vop_lookup_desc, (vop_t *) vfs_cache_lookup },
1961 { &vop_mkdir_desc, (vop_t *) msdosfs_mkdir },
1962 { &vop_mknod_desc, (vop_t *) msdosfs_mknod },
1963 { &vop_pathconf_desc, (vop_t *) msdosfs_pathconf },
1964 { &vop_print_desc, (vop_t *) msdosfs_print },
1965 { &vop_read_desc, (vop_t *) msdosfs_read },
1966 { &vop_readdir_desc, (vop_t *) msdosfs_readdir },
1967 { &vop_reclaim_desc, (vop_t *) msdosfs_reclaim },
1968 { &vop_remove_desc, (vop_t *) msdosfs_remove },
1969 { &vop_rename_desc, (vop_t *) msdosfs_rename },
1970 { &vop_rmdir_desc, (vop_t *) msdosfs_rmdir },
1971 { &vop_setattr_desc, (vop_t *) msdosfs_setattr },
1972 { &vop_strategy_desc, (vop_t *) msdosfs_strategy },
1973 { &vop_symlink_desc, (vop_t *) msdosfs_symlink },
1974 { &vop_unlock_desc, (vop_t *) vop_stdunlock },
1975 { &vop_write_desc, (vop_t *) msdosfs_write },
1976 { &vop_getpages_desc, (vop_t *) msdosfs_getpages },
1977 { &vop_putpages_desc, (vop_t *) msdosfs_putpages },
1978 { NULL, NULL }
1979};
1980static struct vnodeopv_desc msdosfs_vnodeop_opv_desc =
1981 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries };
1982
1983VNODEOP_SET(msdosfs_vnodeop_opv_desc);