VFS messaging/interfacing work stage 1/99. This stage replaces the old
[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 $ */
2d3e977e 2/* $DragonFly: src/sys/vfs/msdosfs/msdosfs_vnops.c,v 1.16 2004/08/13 17:51:11 dillon Exp $ */
984263bc
MD
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>
984263bc
MD
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>
984263bc
MD
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
3020e3be
MD
72#include <sys/buf2.h>
73
1f2de5d4
MD
74#include "bpb.h"
75#include "direntry.h"
76#include "denode.h"
77#include "msdosfsmount.h"
78#include "fat.h"
984263bc
MD
79
80#define DOS_FILESIZE_MAX 0xffffffff
81
82/*
83 * Prototypes for MSDOSFS vnode operations
84 */
a6ee311a
RG
85static int msdosfs_create (struct vop_create_args *);
86static int msdosfs_mknod (struct vop_mknod_args *);
87static int msdosfs_close (struct vop_close_args *);
88static int msdosfs_access (struct vop_access_args *);
89static int msdosfs_getattr (struct vop_getattr_args *);
90static int msdosfs_setattr (struct vop_setattr_args *);
91static int msdosfs_read (struct vop_read_args *);
92static int msdosfs_write (struct vop_write_args *);
93static int msdosfs_fsync (struct vop_fsync_args *);
94static int msdosfs_remove (struct vop_remove_args *);
95static int msdosfs_link (struct vop_link_args *);
96static int msdosfs_rename (struct vop_rename_args *);
97static int msdosfs_mkdir (struct vop_mkdir_args *);
98static int msdosfs_rmdir (struct vop_rmdir_args *);
99static int msdosfs_symlink (struct vop_symlink_args *);
100static int msdosfs_readdir (struct vop_readdir_args *);
101static int msdosfs_bmap (struct vop_bmap_args *);
102static int msdosfs_strategy (struct vop_strategy_args *);
103static int msdosfs_print (struct vop_print_args *);
104static int msdosfs_pathconf (struct vop_pathconf_args *ap);
105static int msdosfs_getpages (struct vop_getpages_args *);
106static int msdosfs_putpages (struct vop_putpages_args *);
984263bc
MD
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.
4625f023
CP
131 *
132 * msdosfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
133 * struct componentname *a_cnp, struct vattr *a_vap)
984263bc
MD
134 */
135static int
4625f023 136msdosfs_create(struct vop_create_args *ap)
984263bc
MD
137{
138 struct componentname *cnp = ap->a_cnp;
139 struct denode ndirent;
140 struct denode *dep;
141 struct denode *pdep = VTODE(ap->a_dvp);
142 struct timespec ts;
143 int error;
144
145#ifdef MSDOSFS_DEBUG
146 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap);
147#endif
148
149 /*
150 * If this is the root directory and there is no space left we
151 * can't do anything. This is because the root directory can not
152 * change size.
153 */
154 if (pdep->de_StartCluster == MSDOSFSROOT
155 && pdep->de_fndoffset >= pdep->de_FileSize) {
156 error = ENOSPC;
157 goto bad;
158 }
159
160 /*
161 * Create a directory entry for the file, then call createde() to
162 * have it installed. NOTE: DOS files are always executable. We
163 * use the absence of the owner write bit to make the file
164 * readonly.
165 */
166#ifdef DIAGNOSTIC
2b69e610 167 if ((cnp->cn_flags & CNP_HASBUF) == 0)
984263bc
MD
168 panic("msdosfs_create: no name");
169#endif
170 bzero(&ndirent, sizeof(ndirent));
171 error = uniqdosname(pdep, cnp, ndirent.de_Name);
172 if (error)
173 goto bad;
174
175 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ?
176 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY;
177 ndirent.de_LowerCase = 0;
178 ndirent.de_StartCluster = 0;
179 ndirent.de_FileSize = 0;
180 ndirent.de_dev = pdep->de_dev;
181 ndirent.de_devvp = pdep->de_devvp;
182 ndirent.de_pmp = pdep->de_pmp;
183 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
184 getnanotime(&ts);
185 DETIMES(&ndirent, &ts, &ts, &ts);
186 error = createde(&ndirent, pdep, &dep, cnp);
187 if (error)
188 goto bad;
189 *ap->a_vpp = DETOV(dep);
190 return (0);
191
192bad:
193 return (error);
194}
195
4625f023
CP
196/*
197 * msdosfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
198 * struct componentname *a_cnp, struct vattr *a_vap)
199 */
984263bc 200static int
4625f023 201msdosfs_mknod(struct vop_mknod_args *ap)
984263bc 202{
984263bc
MD
203 switch (ap->a_vap->va_type) {
204 case VDIR:
205 return (msdosfs_mkdir((struct vop_mkdir_args *)ap));
206 break;
207
208 case VREG:
209 return (msdosfs_create((struct vop_create_args *)ap));
210 break;
211
212 default:
213 return (EINVAL);
214 }
215 /* NOTREACHED */
216}
217
4625f023
CP
218/*
219 * msdosfs_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
220 * struct thread *a_td)
221 */
984263bc 222static int
4625f023 223msdosfs_close(struct vop_close_args *ap)
984263bc
MD
224{
225 struct vnode *vp = ap->a_vp;
226 struct denode *dep = VTODE(vp);
227 struct timespec ts;
41a01a4d 228 lwkt_tokref vlock;
984263bc 229
41a01a4d 230 lwkt_gettoken(&vlock, vp->v_interlock);
984263bc
MD
231 if (vp->v_usecount > 1) {
232 getnanotime(&ts);
8a8d5d85
MD
233 if (vp->v_usecount > 1) {
234 DETIMES(dep, &ts, &ts, &ts);
235 }
984263bc 236 }
41a01a4d 237 lwkt_reltoken(&vlock);
984263bc
MD
238 return 0;
239}
240
4625f023
CP
241/*
242 * msdosfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
243 * struct thread *a_td)
244 */
984263bc 245static int
4625f023 246msdosfs_access(struct vop_access_args *ap)
984263bc
MD
247{
248 struct vnode *vp = ap->a_vp;
249 struct denode *dep = VTODE(ap->a_vp);
250 struct msdosfsmount *pmp = dep->de_pmp;
251 struct ucred *cred = ap->a_cred;
252 mode_t mask, file_mode, mode = ap->a_mode;
0e99e805 253 gid_t *gp;
984263bc
MD
254 int i;
255
256 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) |
257 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH));
258 file_mode &= pmp->pm_mask;
259
260 /*
261 * Disallow write attempts on read-only file systems;
262 * unless the file is a socket, fifo, or a block or
263 * character device resident on the file system.
264 */
265 if (mode & VWRITE) {
266 switch (vp->v_type) {
267 case VDIR:
268 case VLNK:
269 case VREG:
270 if (vp->v_mount->mnt_flag & MNT_RDONLY)
271 return (EROFS);
272 break;
273 default:
274 break;
275 }
276 }
277
278 /* User id 0 always gets access. */
279 if (cred->cr_uid == 0)
280 return 0;
281
282 mask = 0;
283
284 /* Otherwise, check the owner. */
285 if (cred->cr_uid == pmp->pm_uid) {
286 if (mode & VEXEC)
287 mask |= S_IXUSR;
288 if (mode & VREAD)
289 mask |= S_IRUSR;
290 if (mode & VWRITE)
291 mask |= S_IWUSR;
292 return (file_mode & mask) == mask ? 0 : EACCES;
293 }
294
295 /* Otherwise, check the groups. */
296 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
297 if (pmp->pm_gid == *gp) {
298 if (mode & VEXEC)
299 mask |= S_IXGRP;
300 if (mode & VREAD)
301 mask |= S_IRGRP;
302 if (mode & VWRITE)
303 mask |= S_IWGRP;
304 return (file_mode & mask) == mask ? 0 : EACCES;
305 }
306
307 /* Otherwise, check everyone else. */
308 if (mode & VEXEC)
309 mask |= S_IXOTH;
310 if (mode & VREAD)
311 mask |= S_IROTH;
312 if (mode & VWRITE)
313 mask |= S_IWOTH;
314 return (file_mode & mask) == mask ? 0 : EACCES;
315}
316
4625f023
CP
317/*
318 * msdosfs_getattr(struct vnode *a_vp, struct vattr *a_vap,
319 * struct ucred *a_cred, struct thread *a_td)
320 */
984263bc 321static int
4625f023 322msdosfs_getattr(struct vop_getattr_args *ap)
984263bc
MD
323{
324 struct denode *dep = VTODE(ap->a_vp);
325 struct msdosfsmount *pmp = dep->de_pmp;
326 struct vattr *vap = ap->a_vap;
327 mode_t mode;
328 struct timespec ts;
329 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
330 u_long fileid;
331
332 getnanotime(&ts);
333 DETIMES(dep, &ts, &ts, &ts);
334 vap->va_fsid = dev2udev(dep->de_dev);
335 /*
336 * The following computation of the fileid must be the same as that
337 * used in msdosfs_readdir() to compute d_fileno. If not, pwd
338 * doesn't work.
339 */
340 if (dep->de_Attributes & ATTR_DIRECTORY) {
341 fileid = cntobn(pmp, dep->de_StartCluster) * dirsperblk;
342 if (dep->de_StartCluster == MSDOSFSROOT)
343 fileid = 1;
344 } else {
345 fileid = cntobn(pmp, dep->de_dirclust) * dirsperblk;
346 if (dep->de_dirclust == MSDOSFSROOT)
347 fileid = roottobn(pmp, 0) * dirsperblk;
348 fileid += dep->de_diroffset / sizeof(struct direntry);
349 }
350 vap->va_fileid = fileid;
351 if ((dep->de_Attributes & ATTR_READONLY) == 0)
352 mode = S_IRWXU|S_IRWXG|S_IRWXO;
353 else
354 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
355 vap->va_mode = mode & pmp->pm_mask;
356 vap->va_uid = pmp->pm_uid;
357 vap->va_gid = pmp->pm_gid;
358 vap->va_nlink = 1;
359 vap->va_rdev = 0;
360 vap->va_size = dep->de_FileSize;
361 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime);
362 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) {
363 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime);
364 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime);
365 } else {
366 vap->va_atime = vap->va_mtime;
367 vap->va_ctime = vap->va_mtime;
368 }
369 vap->va_flags = 0;
370 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0)
371 vap->va_flags |= SF_ARCHIVED;
372 vap->va_gen = 0;
373 vap->va_blocksize = pmp->pm_bpcluster;
374 vap->va_bytes =
375 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask;
376 vap->va_type = ap->a_vp->v_type;
377 vap->va_filerev = dep->de_modrev;
378 return (0);
379}
380
4625f023
CP
381/*
382 * msdosfs_setattr(struct vnode *a_vp, struct vattr *a_vap,
383 * struct ucred *a_cred, struct thread *a_td)
384 */
984263bc 385static int
4625f023 386msdosfs_setattr(struct vop_setattr_args *ap)
984263bc
MD
387{
388 struct vnode *vp = ap->a_vp;
389 struct denode *dep = VTODE(ap->a_vp);
390 struct msdosfsmount *pmp = dep->de_pmp;
391 struct vattr *vap = ap->a_vap;
392 struct ucred *cred = ap->a_cred;
393 int error = 0;
394
395#ifdef MSDOSFS_DEBUG
396 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n",
dadab5e9 397 ap->a_vp, vap, cred, ap->a_td);
984263bc
MD
398#endif
399
400 /*
401 * Check for unsettable attributes.
402 */
403 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
404 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
405 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
406 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
407#ifdef MSDOSFS_DEBUG
408 printf("msdosfs_setattr(): returning EINVAL\n");
409 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n",
410 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid);
411 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n",
412 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen);
413 printf(" va_uid %x, va_gid %x\n",
414 vap->va_uid, vap->va_gid);
415#endif
416 return (EINVAL);
417 }
418 if (vap->va_flags != VNOVAL) {
419 if (vp->v_mount->mnt_flag & MNT_RDONLY)
420 return (EROFS);
421 if (cred->cr_uid != pmp->pm_uid &&
dadab5e9 422 (error = suser_cred(cred, PRISON_ROOT)))
984263bc
MD
423 return (error);
424 /*
425 * We are very inconsistent about handling unsupported
426 * attributes. We ignored the access time and the
427 * read and execute bits. We were strict for the other
428 * attributes.
429 *
430 * Here we are strict, stricter than ufs in not allowing
431 * users to attempt to set SF_SETTABLE bits or anyone to
432 * set unsupported bits. However, we ignore attempts to
433 * set ATTR_ARCHIVE for directories `cp -pr' from a more
434 * sensible file system attempts it a lot.
435 */
436 if (cred->cr_uid != 0) {
437 if (vap->va_flags & SF_SETTABLE)
438 return EPERM;
439 }
440 if (vap->va_flags & ~SF_ARCHIVED)
441 return EOPNOTSUPP;
442 if (vap->va_flags & SF_ARCHIVED)
443 dep->de_Attributes &= ~ATTR_ARCHIVE;
444 else if (!(dep->de_Attributes & ATTR_DIRECTORY))
445 dep->de_Attributes |= ATTR_ARCHIVE;
446 dep->de_flag |= DE_MODIFIED;
447 }
448
449 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
450 uid_t uid;
451 gid_t gid;
452
453 if (vp->v_mount->mnt_flag & MNT_RDONLY)
454 return (EROFS);
455 uid = vap->va_uid;
456 if (uid == (uid_t)VNOVAL)
457 uid = pmp->pm_uid;
458 gid = vap->va_gid;
459 if (gid == (gid_t)VNOVAL)
460 gid = pmp->pm_gid;
461 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid ||
462 (gid != pmp->pm_gid && !groupmember(gid, cred))) &&
dadab5e9 463 (error = suser_cred(cred, PRISON_ROOT)))
984263bc
MD
464 return error;
465 if (uid != pmp->pm_uid || gid != pmp->pm_gid)
466 return EINVAL;
467 }
468
469 if (vap->va_size != VNOVAL) {
470 /*
471 * Disallow write attempts on read-only file systems;
472 * unless the file is a socket, fifo, or a block or
473 * character device resident on the file system.
474 */
475 switch (vp->v_type) {
476 case VDIR:
477 return (EISDIR);
478 /* NOT REACHED */
479 case VLNK:
480 case VREG:
481 if (vp->v_mount->mnt_flag & MNT_RDONLY)
482 return (EROFS);
483 break;
484 default:
485 break;
486 }
3b568787 487 error = detrunc(dep, vap->va_size, 0, ap->a_td);
984263bc
MD
488 if (error)
489 return error;
490 }
491 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
492 if (vp->v_mount->mnt_flag & MNT_RDONLY)
493 return (EROFS);
494 if (cred->cr_uid != pmp->pm_uid &&
dadab5e9 495 (error = suser_cred(cred, PRISON_ROOT)) &&
984263bc 496 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
dadab5e9 497 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_td))))
984263bc
MD
498 return (error);
499 if (vp->v_type != VDIR) {
500 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 &&
501 vap->va_atime.tv_sec != VNOVAL) {
502 dep->de_flag &= ~DE_ACCESS;
503 unix2dostime(&vap->va_atime, &dep->de_ADate,
504 NULL, NULL);
505 }
506 if (vap->va_mtime.tv_sec != VNOVAL) {
507 dep->de_flag &= ~DE_UPDATE;
508 unix2dostime(&vap->va_mtime, &dep->de_MDate,
509 &dep->de_MTime, NULL);
510 }
511 dep->de_Attributes |= ATTR_ARCHIVE;
512 dep->de_flag |= DE_MODIFIED;
513 }
514 }
515 /*
516 * DOS files only have the ability to have their writability
517 * attribute set, so we use the owner write bit to set the readonly
518 * attribute.
519 */
520 if (vap->va_mode != (mode_t)VNOVAL) {
521 if (vp->v_mount->mnt_flag & MNT_RDONLY)
522 return (EROFS);
523 if (cred->cr_uid != pmp->pm_uid &&
dadab5e9 524 (error = suser_cred(cred, PRISON_ROOT)))
984263bc
MD
525 return (error);
526 if (vp->v_type != VDIR) {
527 /* We ignore the read and execute bits. */
528 if (vap->va_mode & VWRITE)
529 dep->de_Attributes &= ~ATTR_READONLY;
530 else
531 dep->de_Attributes |= ATTR_READONLY;
532 dep->de_Attributes |= ATTR_ARCHIVE;
533 dep->de_flag |= DE_MODIFIED;
534 }
535 }
536 return (deupdat(dep, 1));
537}
538
4625f023
CP
539/*
540 * msdosfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
541 * struct ucred *a_cred)
542 */
984263bc 543static int
4625f023 544msdosfs_read(struct vop_read_args *ap)
984263bc
MD
545{
546 int error = 0;
547 int blsize;
548 int isadir;
549 int orig_resid;
550 u_int n;
551 u_long diff;
552 u_long on;
553 daddr_t lbn;
554 daddr_t rablock;
555 int rasize;
556 int seqcount;
557 struct buf *bp;
558 struct vnode *vp = ap->a_vp;
559 struct denode *dep = VTODE(vp);
560 struct msdosfsmount *pmp = dep->de_pmp;
561 struct uio *uio = ap->a_uio;
562
563 if (uio->uio_offset < 0)
564 return (EINVAL);
565
566 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX)
567 return (0);
568 /*
569 * If they didn't ask for any data, then we are done.
570 */
571 orig_resid = uio->uio_resid;
572 if (orig_resid <= 0)
573 return (0);
574
575 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
576
577 isadir = dep->de_Attributes & ATTR_DIRECTORY;
578 do {
579 if (uio->uio_offset >= dep->de_FileSize)
580 break;
581 lbn = de_cluster(pmp, uio->uio_offset);
582 /*
583 * If we are operating on a directory file then be sure to
584 * do i/o with the vnode for the filesystem instead of the
585 * vnode for the directory.
586 */
587 if (isadir) {
588 /* convert cluster # to block # */
589 error = pcbmap(dep, lbn, &lbn, 0, &blsize);
590 if (error == E2BIG) {
591 error = EINVAL;
592 break;
593 } else if (error)
594 break;
3b568787 595 error = bread(pmp->pm_devvp, lbn, blsize, &bp);
984263bc
MD
596 } else {
597 blsize = pmp->pm_bpcluster;
598 rablock = lbn + 1;
599 if (seqcount > 1 &&
600 de_cn2off(pmp, rablock) < dep->de_FileSize) {
601 rasize = pmp->pm_bpcluster;
602 error = breadn(vp, lbn, blsize,
3b568787 603 &rablock, &rasize, 1, &bp);
984263bc 604 } else {
3b568787 605 error = bread(vp, lbn, blsize, &bp);
984263bc
MD
606 }
607 }
608 if (error) {
609 brelse(bp);
610 break;
611 }
612 on = uio->uio_offset & pmp->pm_crbomask;
613 diff = pmp->pm_bpcluster - on;
614 n = diff > uio->uio_resid ? uio->uio_resid : diff;
615 diff = dep->de_FileSize - uio->uio_offset;
616 if (diff < n)
617 n = diff;
618 diff = blsize - bp->b_resid;
619 if (diff < n)
620 n = diff;
621 error = uiomove(bp->b_data + on, (int) n, uio);
622 brelse(bp);
623 } while (error == 0 && uio->uio_resid > 0 && n != 0);
624 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) &&
625 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0)
626 dep->de_flag |= DE_ACCESS;
627 return (error);
628}
629
630/*
631 * Write data to a file or directory.
4625f023
CP
632 *
633 * msdosfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
634 * struct ucred *a_cred)
984263bc
MD
635 */
636static int
4625f023 637msdosfs_write(struct vop_write_args *ap)
984263bc
MD
638{
639 int n;
640 int croffset;
641 int resid;
642 u_long osize;
643 int error = 0;
644 u_long count;
645 daddr_t bn, lastcn;
646 struct buf *bp;
647 int ioflag = ap->a_ioflag;
648 struct uio *uio = ap->a_uio;
dadab5e9 649 struct thread *td = uio->uio_td;
984263bc
MD
650 struct vnode *vp = ap->a_vp;
651 struct vnode *thisvp;
652 struct denode *dep = VTODE(vp);
653 struct msdosfsmount *pmp = dep->de_pmp;
049d6e6d 654 struct proc *p = (td ? td->td_proc : NULL);
984263bc
MD
655
656#ifdef MSDOSFS_DEBUG
657 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n",
658 vp, uio, ioflag, cred);
659 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n",
660 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster);
661#endif
662
663 switch (vp->v_type) {
664 case VREG:
665 if (ioflag & IO_APPEND)
666 uio->uio_offset = dep->de_FileSize;
667 thisvp = vp;
668 break;
669 case VDIR:
670 return EISDIR;
671 default:
672 panic("msdosfs_write(): bad file type");
673 }
674
675 if (uio->uio_offset < 0)
676 return (EFBIG);
677
678 if (uio->uio_resid == 0)
679 return (0);
680
681 /*
682 * If they've exceeded their filesize limit, tell them about it.
683 */
684 if (p &&
685 ((uoff_t)uio->uio_offset + uio->uio_resid >
686 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) {
687 psignal(p, SIGXFSZ);
688 return (EFBIG);
689 }
690
691 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX)
692 return (EFBIG);
693
694 /*
695 * If the offset we are starting the write at is beyond the end of
696 * the file, then they've done a seek. Unix filesystems allow
697 * files with holes in them, DOS doesn't so we must fill the hole
698 * with zeroed blocks.
699 */
700 if (uio->uio_offset > dep->de_FileSize) {
3b568787 701 error = deextend(dep, uio->uio_offset);
984263bc
MD
702 if (error)
703 return (error);
704 }
705
706 /*
707 * Remember some values in case the write fails.
708 */
709 resid = uio->uio_resid;
710 osize = dep->de_FileSize;
711
712 /*
713 * If we write beyond the end of the file, extend it to its ultimate
714 * size ahead of the time to hopefully get a contiguous area.
715 */
716 if (uio->uio_offset + resid > osize) {
717 count = de_clcount(pmp, uio->uio_offset + resid) -
718 de_clcount(pmp, osize);
719 error = extendfile(dep, count, NULL, NULL, 0);
720 if (error && (error != ENOSPC || (ioflag & IO_UNIT)))
721 goto errexit;
722 lastcn = dep->de_fc[FC_LASTFC].fc_frcn;
723 } else
724 lastcn = de_clcount(pmp, osize) - 1;
725
726 do {
727 if (de_cluster(pmp, uio->uio_offset) > lastcn) {
728 error = ENOSPC;
729 break;
730 }
731
732 croffset = uio->uio_offset & pmp->pm_crbomask;
733 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset);
734 if (uio->uio_offset + n > dep->de_FileSize) {
735 dep->de_FileSize = uio->uio_offset + n;
736 /* The object size needs to be set before buffer is allocated */
737 vnode_pager_setsize(vp, dep->de_FileSize);
738 }
739
740 bn = de_cluster(pmp, uio->uio_offset);
741 if ((uio->uio_offset & pmp->pm_crbomask) == 0
742 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid)
743 > de_cluster(pmp, uio->uio_offset)
744 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) {
745 /*
746 * If either the whole cluster gets written,
747 * or we write the cluster from its start beyond EOF,
748 * then no need to read data from disk.
749 */
750 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0);
751 clrbuf(bp);
752 /*
753 * Do the bmap now, since pcbmap needs buffers
754 * for the fat table. (see msdosfs_strategy)
755 */
756 if (bp->b_blkno == bp->b_lblkno) {
757 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno,
758 0, 0);
759 if (error)
760 bp->b_blkno = -1;
761 }
762 if (bp->b_blkno == -1) {
763 brelse(bp);
764 if (!error)
765 error = EIO; /* XXX */
766 break;
767 }
768 } else {
769 /*
770 * The block we need to write into exists, so read it in.
771 */
3b568787 772 error = bread(thisvp, bn, pmp->pm_bpcluster, &bp);
984263bc
MD
773 if (error) {
774 brelse(bp);
775 break;
776 }
777 }
778
779 /*
780 * Should these vnode_pager_* functions be done on dir
781 * files?
782 */
783
784 /*
785 * Copy the data from user space into the buf header.
786 */
787 error = uiomove(bp->b_data + croffset, n, uio);
788 if (error) {
789 brelse(bp);
790 break;
791 }
792
793 /*
794 * If they want this synchronous then write it and wait for
795 * it. Otherwise, if on a cluster boundary write it
796 * asynchronously so we can move on to the next block
797 * without delay. Otherwise do a delayed write because we
798 * may want to write somemore into the block later.
799 */
800 if (ioflag & IO_SYNC)
801 (void) bwrite(bp);
802 else if (n + croffset == pmp->pm_bpcluster)
803 bawrite(bp);
804 else
805 bdwrite(bp);
806 dep->de_flag |= DE_UPDATE;
807 } while (error == 0 && uio->uio_resid > 0);
808
809 /*
810 * If the write failed and they want us to, truncate the file back
811 * to the size it was before the write was attempted.
812 */
813errexit:
814 if (error) {
815 if (ioflag & IO_UNIT) {
3b568787 816 detrunc(dep, osize, ioflag & IO_SYNC, NULL);
984263bc
MD
817 uio->uio_offset -= resid - uio->uio_resid;
818 uio->uio_resid = resid;
819 } else {
3b568787 820 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NULL);
984263bc
MD
821 if (uio->uio_resid != resid)
822 error = 0;
823 }
824 } else if (ioflag & IO_SYNC)
825 error = deupdat(dep, 1);
826 return (error);
827}
828
829/*
830 * Flush the blocks of a file to disk.
831 *
832 * This function is worthless for vnodes that represent directories. Maybe we
833 * could just do a sync if they try an fsync on a directory file.
4625f023
CP
834 *
835 * msdosfs_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor,
836 * struct thread *a_td)
984263bc
MD
837 */
838static int
4625f023 839msdosfs_fsync(struct vop_fsync_args *ap)
984263bc
MD
840{
841 struct vnode *vp = ap->a_vp;
842 int s;
843 struct buf *bp, *nbp;
844
845 /*
846 * Flush all dirty buffers associated with a vnode.
847 */
848loop:
849 s = splbio();
850 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
851 nbp = TAILQ_NEXT(bp, b_vnbufs);
852 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
853 continue;
854 if ((bp->b_flags & B_DELWRI) == 0)
855 panic("msdosfs_fsync: not dirty");
856 bremfree(bp);
857 splx(s);
858 (void) bwrite(bp);
859 goto loop;
860 }
861 while (vp->v_numoutput) {
862 vp->v_flag |= VBWAIT;
377d4740 863 (void) tsleep((caddr_t)&vp->v_numoutput, 0, "msdosfsn", 0);
984263bc
MD
864 }
865#ifdef DIAGNOSTIC
866 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd)) {
867 vprint("msdosfs_fsync: dirty", vp);
868 goto loop;
869 }
870#endif
871 splx(s);
872 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT));
873}
874
4625f023
CP
875/*
876 * msdosfs_remove(struct vnode *a_dvp, struct vnode *a_vp,
877 * struct componentname *a_cnp)
878 */
984263bc 879static int
4625f023 880msdosfs_remove(struct vop_remove_args *ap)
984263bc
MD
881{
882 struct denode *dep = VTODE(ap->a_vp);
883 struct denode *ddep = VTODE(ap->a_dvp);
884 int error;
885
886 if (ap->a_vp->v_type == VDIR)
887 error = EPERM;
888 else
889 error = removede(ddep, dep);
890#ifdef MSDOSFS_DEBUG
891 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount);
892#endif
893 return (error);
894}
895
896/*
897 * DOS filesystems don't know what links are. But since we already called
898 * msdosfs_lookup() with create and lockparent, the parent is locked so we
899 * have to free it before we return the error.
4625f023
CP
900 *
901 * msdosfs_link(struct vnode *a_tdvp, struct vnode *a_vp,
902 * struct componentname *a_cnp)
984263bc
MD
903 */
904static int
4625f023 905msdosfs_link(struct vop_link_args *ap)
984263bc
MD
906{
907 return (EOPNOTSUPP);
908}
909
910/*
911 * Renames on files require moving the denode to a new hash queue since the
912 * denode's location is used to compute which hash queue to put the file
913 * in. Unless it is a rename in place. For example "mv a b".
914 *
915 * What follows is the basic algorithm:
916 *
917 * if (file move) {
918 * if (dest file exists) {
919 * remove dest file
920 * }
921 * if (dest and src in same directory) {
922 * rewrite name in existing directory slot
923 * } else {
924 * write new entry in dest directory
925 * update offset and dirclust in denode
926 * move denode to new hash chain
927 * clear old directory entry
928 * }
929 * } else {
930 * directory move
931 * if (dest directory exists) {
932 * if (dest is not empty) {
933 * return ENOTEMPTY
934 * }
935 * remove dest directory
936 * }
937 * if (dest and src in same directory) {
938 * rewrite name in existing entry
939 * } else {
940 * be sure dest is not a child of src directory
941 * write entry in dest directory
942 * update "." and ".." in moved directory
943 * clear old directory entry for moved directory
944 * }
945 * }
946 *
947 * On entry:
948 * source's parent directory is unlocked
949 * source file or directory is unlocked
950 * destination's parent directory is locked
951 * destination file or directory is locked if it exists
952 *
953 * On exit:
954 * all denodes should be released
955 *
956 * Notes:
957 * I'm not sure how the memory containing the pathnames pointed at by the
958 * componentname structures is freed, there may be some memory bleeding
959 * for each rename done.
4625f023
CP
960 *
961 * msdosfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
962 * struct componentname *a_fcnp, struct vnode *a_tdvp,
963 * struct vnode *a_tvp, struct componentname *a_tcnp)
984263bc
MD
964 */
965static int
4625f023 966msdosfs_rename(struct vop_rename_args *ap)
984263bc
MD
967{
968 struct vnode *tdvp = ap->a_tdvp;
969 struct vnode *fvp = ap->a_fvp;
970 struct vnode *fdvp = ap->a_fdvp;
971 struct vnode *tvp = ap->a_tvp;
972 struct componentname *tcnp = ap->a_tcnp;
973 struct componentname *fcnp = ap->a_fcnp;
dadab5e9 974 struct thread *td = fcnp->cn_td;
984263bc
MD
975 struct denode *ip, *xp, *dp, *zp;
976 u_char toname[11], oldname[11];
977 u_long from_diroffset, to_diroffset;
978 u_char to_count;
979 int doingdirectory = 0, newparent = 0;
980 int error;
981 u_long cn;
982 daddr_t bn;
983 struct denode *fddep; /* from file's parent directory */
984 struct msdosfsmount *pmp;
985 struct direntry *dotdotp;
986 struct buf *bp;
987
988 fddep = VTODE(ap->a_fdvp);
989 pmp = fddep->de_pmp;
990
991 pmp = VFSTOMSDOSFS(fdvp->v_mount);
992
993#ifdef DIAGNOSTIC
2b69e610
MD
994 if ((tcnp->cn_flags & CNP_HASBUF) == 0 ||
995 (fcnp->cn_flags & CNP_HASBUF) == 0)
984263bc
MD
996 panic("msdosfs_rename: no name");
997#endif
998 /*
999 * Check for cross-device rename.
1000 */
1001 if ((fvp->v_mount != tdvp->v_mount) ||
1002 (tvp && (fvp->v_mount != tvp->v_mount))) {
1003 error = EXDEV;
1004abortit:
1005 if (tdvp == tvp)
1006 vrele(tdvp);
1007 else
1008 vput(tdvp);
1009 if (tvp)
1010 vput(tvp);
1011 vrele(fdvp);
1012 vrele(fvp);
1013 return (error);
1014 }
1015
1016 /*
1017 * If source and dest are the same, do nothing.
1018 */
1019 if (tvp == fvp) {
1020 error = 0;
1021 goto abortit;
1022 }
1023
41a01a4d 1024 error = vn_lock(fvp, NULL, LK_EXCLUSIVE, td);
984263bc
MD
1025 if (error)
1026 goto abortit;
1027 dp = VTODE(fdvp);
1028 ip = VTODE(fvp);
1029
1030 /*
1031 * Be sure we are not renaming ".", "..", or an alias of ".". This
1032 * leads to a crippled directory tree. It's pretty tough to do a
1033 * "ls" or "pwd" with the "." directory entry missing, and "cd .."
1034 * doesn't work if the ".." entry is missing.
1035 */
1036 if (ip->de_Attributes & ATTR_DIRECTORY) {
1037 /*
1038 * Avoid ".", "..", and aliases of "." for obvious reasons.
1039 */
1040 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
1041 dp == ip ||
2b69e610
MD
1042 (fcnp->cn_flags & CNP_ISDOTDOT) ||
1043 (tcnp->cn_flags & CNP_ISDOTDOT) ||
984263bc 1044 (ip->de_flag & DE_RENAME)) {
41a01a4d 1045 VOP_UNLOCK(fvp, NULL, 0, td);
984263bc
MD
1046 error = EINVAL;
1047 goto abortit;
1048 }
1049 ip->de_flag |= DE_RENAME;
1050 doingdirectory++;
1051 }
1052
1053 /*
1054 * When the target exists, both the directory
1055 * and target vnodes are returned locked.
1056 */
1057 dp = VTODE(tdvp);
1058 xp = tvp ? VTODE(tvp) : NULL;
1059 /*
1060 * Remember direntry place to use for destination
1061 */
1062 to_diroffset = dp->de_fndoffset;
1063 to_count = dp->de_fndcnt;
1064
1065 /*
1066 * If ".." must be changed (ie the directory gets a new
1067 * parent) then the source directory must not be in the
1068 * directory heirarchy above the target, as this would
1069 * orphan everything below the source directory. Also
1070 * the user must have write permission in the source so
1071 * as to be able to change "..". We must repeat the call
1072 * to namei, as the parent directory is unlocked by the
1073 * call to doscheckpath().
1074 */
dadab5e9 1075 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_td);
41a01a4d 1076 VOP_UNLOCK(fvp, NULL, 0, td);
984263bc
MD
1077 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster)
1078 newparent = 1;
1079 if (doingdirectory && newparent) {
1080 if (error) /* write access check above */
1081 goto bad;
1082 if (xp != NULL)
1083 vput(tvp);
1084 /*
1085 * doscheckpath() vput()'s dp,
1086 * so we have to do a relookup afterwards
1087 */
1088 error = doscheckpath(ip, dp);
1089 if (error)
1090 goto out;
2b69e610 1091 if ((tcnp->cn_flags & CNP_SAVESTART) == 0)
984263bc
MD
1092 panic("msdosfs_rename: lost to startdir");
1093 error = relookup(tdvp, &tvp, tcnp);
1094 if (error)
1095 goto out;
1096 dp = VTODE(tdvp);
1097 xp = tvp ? VTODE(tvp) : NULL;
1098 }
1099
1100 if (xp != NULL) {
1101 /*
1102 * Target must be empty if a directory and have no links
1103 * to it. Also, ensure source and target are compatible
1104 * (both directories, or both not directories).
1105 */
1106 if (xp->de_Attributes & ATTR_DIRECTORY) {
1107 if (!dosdirempty(xp)) {
1108 error = ENOTEMPTY;
1109 goto bad;
1110 }
1111 if (!doingdirectory) {
1112 error = ENOTDIR;
1113 goto bad;
1114 }
1115 cache_purge(tdvp);
1116 } else if (doingdirectory) {
1117 error = EISDIR;
1118 goto bad;
1119 }
1120 error = removede(dp, xp);
1121 if (error)
1122 goto bad;
1123 vput(tvp);
1124 xp = NULL;
1125 }
1126
1127 /*
1128 * Convert the filename in tcnp into a dos filename. We copy this
1129 * into the denode and directory entry for the destination
1130 * file/directory.
1131 */
1132 error = uniqdosname(VTODE(tdvp), tcnp, toname);
1133 if (error)
1134 goto abortit;
1135
1136 /*
1137 * Since from wasn't locked at various places above,
1138 * have to do a relookup here.
1139 */
2b69e610
MD
1140 fcnp->cn_flags &= ~CNP_MODMASK;
1141 fcnp->cn_flags |= CNP_LOCKPARENT | CNP_LOCKLEAF;
1142 if ((fcnp->cn_flags & CNP_SAVESTART) == 0)
984263bc
MD
1143 panic("msdosfs_rename: lost from startdir");
1144 if (!newparent)
41a01a4d 1145 VOP_UNLOCK(tdvp, NULL, 0, td);
984263bc
MD
1146 if (relookup(fdvp, &fvp, fcnp) == 0)
1147 vrele(fdvp);
1148 if (fvp == NULL) {
1149 /*
1150 * From name has disappeared.
1151 */
1152 if (doingdirectory)
1153 panic("rename: lost dir entry");
1154 vrele(ap->a_fvp);
1155 if (newparent)
41a01a4d 1156 VOP_UNLOCK(tdvp, NULL, 0, td);
984263bc
MD
1157 vrele(tdvp);
1158 return 0;
1159 }
1160 xp = VTODE(fvp);
1161 zp = VTODE(fdvp);
1162 from_diroffset = zp->de_fndoffset;
1163
1164 /*
1165 * Ensure that the directory entry still exists and has not
1166 * changed till now. If the source is a file the entry may
1167 * have been unlinked or renamed. In either case there is
1168 * no further work to be done. If the source is a directory
1169 * then it cannot have been rmdir'ed or renamed; this is
1170 * prohibited by the DE_RENAME flag.
1171 */
1172 if (xp != ip) {
1173 if (doingdirectory)
1174 panic("rename: lost dir entry");
1175 vrele(ap->a_fvp);
41a01a4d 1176 VOP_UNLOCK(fvp, NULL, 0, td);
984263bc 1177 if (newparent)
41a01a4d 1178 VOP_UNLOCK(fdvp, NULL, 0, td);
984263bc
MD
1179 xp = NULL;
1180 } else {
1181 vrele(fvp);
1182 xp = NULL;
1183
1184 /*
1185 * First write a new entry in the destination
1186 * directory and mark the entry in the source directory
1187 * as deleted. Then move the denode to the correct hash
1188 * chain for its new location in the filesystem. And, if
1189 * we moved a directory, then update its .. entry to point
1190 * to the new parent directory.
1191 */
1192 bcopy(ip->de_Name, oldname, 11);
1193 bcopy(toname, ip->de_Name, 11); /* update denode */
1194 dp->de_fndoffset = to_diroffset;
1195 dp->de_fndcnt = to_count;
1196 error = createde(ip, dp, (struct denode **)0, tcnp);
1197 if (error) {
1198 bcopy(oldname, ip->de_Name, 11);
1199 if (newparent)
41a01a4d
MD
1200 VOP_UNLOCK(fdvp, NULL, 0, td);
1201 VOP_UNLOCK(fvp, NULL, 0, td);
984263bc
MD
1202 goto bad;
1203 }
1204 ip->de_refcnt++;
1205 zp->de_fndoffset = from_diroffset;
1206 error = removede(zp, ip);
1207 if (error) {
1208 /* XXX should really panic here, fs is corrupt */
1209 if (newparent)
41a01a4d
MD
1210 VOP_UNLOCK(fdvp, NULL, 0, td);
1211 VOP_UNLOCK(fvp, NULL, 0, td);
984263bc
MD
1212 goto bad;
1213 }
1214 if (!doingdirectory) {
1215 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0,
1216 &ip->de_dirclust, 0);
1217 if (error) {
1218 /* XXX should really panic here, fs is corrupt */
1219 if (newparent)
41a01a4d
MD
1220 VOP_UNLOCK(fdvp, NULL, 0, td);
1221 VOP_UNLOCK(fvp, NULL, 0, td);
984263bc
MD
1222 goto bad;
1223 }
1224 if (ip->de_dirclust == MSDOSFSROOT)
1225 ip->de_diroffset = to_diroffset;
1226 else
1227 ip->de_diroffset = to_diroffset & pmp->pm_crbomask;
1228 }
1229 reinsert(ip);
1230 if (newparent)
41a01a4d 1231 VOP_UNLOCK(fdvp, NULL, 0, td);
984263bc
MD
1232 }
1233
1234 /*
1235 * If we moved a directory to a new parent directory, then we must
1236 * fixup the ".." entry in the moved directory.
1237 */
1238 if (doingdirectory && newparent) {
1239 cn = ip->de_StartCluster;
1240 if (cn == MSDOSFSROOT) {
1241 /* this should never happen */
1242 panic("msdosfs_rename(): updating .. in root directory?");
1243 } else
1244 bn = cntobn(pmp, cn);
3b568787 1245 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, &bp);
984263bc
MD
1246 if (error) {
1247 /* XXX should really panic here, fs is corrupt */
1248 brelse(bp);
41a01a4d 1249 VOP_UNLOCK(fvp, NULL, 0, td);
984263bc
MD
1250 goto bad;
1251 }
1252 dotdotp = (struct direntry *)bp->b_data + 1;
1253 putushort(dotdotp->deStartCluster, dp->de_StartCluster);
1254 if (FAT32(pmp))
1255 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16);
1256 error = bwrite(bp);
1257 if (error) {
1258 /* XXX should really panic here, fs is corrupt */
41a01a4d 1259 VOP_UNLOCK(fvp, NULL, 0, td);
984263bc
MD
1260 goto bad;
1261 }
1262 }
1263
41a01a4d 1264 VOP_UNLOCK(fvp, NULL, 0, td);
984263bc
MD
1265bad:
1266 if (xp)
1267 vput(tvp);
1268 vput(tdvp);
1269out:
1270 ip->de_flag &= ~DE_RENAME;
1271 vrele(fdvp);
1272 vrele(fvp);
1273 return (error);
1274
1275}
1276
1277static struct {
1278 struct direntry dot;
1279 struct direntry dotdot;
1280} dosdirtemplate = {
1281 { ". ", " ", /* the . entry */
1282 ATTR_DIRECTORY, /* file attribute */
1283 0, /* reserved */
1284 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1285 { 0, 0 }, /* access date */
1286 { 0, 0 }, /* high bits of start cluster */
1287 { 210, 4 }, { 210, 4 }, /* modify time & date */
1288 { 0, 0 }, /* startcluster */
1289 { 0, 0, 0, 0 } /* filesize */
1290 },
1291 { ".. ", " ", /* the .. entry */
1292 ATTR_DIRECTORY, /* file attribute */
1293 0, /* reserved */
1294 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1295 { 0, 0 }, /* access date */
1296 { 0, 0 }, /* high bits of start cluster */
1297 { 210, 4 }, { 210, 4 }, /* modify time & date */
1298 { 0, 0 }, /* startcluster */
1299 { 0, 0, 0, 0 } /* filesize */
1300 }
1301};
1302
4625f023
CP
1303/*
1304 * msdosfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
1305 * struct componentname *a_cnp, struct vattr *a_vap)
1306 */
984263bc 1307static int
4625f023 1308msdosfs_mkdir(struct vop_mkdir_args *ap)
984263bc
MD
1309{
1310 struct componentname *cnp = ap->a_cnp;
1311 struct denode *dep;
1312 struct denode *pdep = VTODE(ap->a_dvp);
1313 struct direntry *denp;
1314 struct msdosfsmount *pmp = pdep->de_pmp;
1315 struct buf *bp;
1316 u_long newcluster, pcl;
1317 int bn;
1318 int error;
1319 struct denode ndirent;
1320 struct timespec ts;
1321
1322 /*
1323 * If this is the root directory and there is no space left we
1324 * can't do anything. This is because the root directory can not
1325 * change size.
1326 */
1327 if (pdep->de_StartCluster == MSDOSFSROOT
1328 && pdep->de_fndoffset >= pdep->de_FileSize) {
1329 error = ENOSPC;
1330 goto bad2;
1331 }
1332
1333 /*
1334 * Allocate a cluster to hold the about to be created directory.
1335 */
1336 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL);
1337 if (error)
1338 goto bad2;
1339
1340 bzero(&ndirent, sizeof(ndirent));
1341 ndirent.de_pmp = pmp;
1342 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
1343 getnanotime(&ts);
1344 DETIMES(&ndirent, &ts, &ts, &ts);
1345
1346 /*
1347 * Now fill the cluster with the "." and ".." entries. And write
1348 * the cluster to disk. This way it is there for the parent
1349 * directory to be pointing at if there were a crash.
1350 */
1351 bn = cntobn(pmp, newcluster);
1352 /* always succeeds */
1353 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0);
1354 bzero(bp->b_data, pmp->pm_bpcluster);
1355 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate);
1356 denp = (struct direntry *)bp->b_data;
1357 putushort(denp[0].deStartCluster, newcluster);
1358 putushort(denp[0].deCDate, ndirent.de_CDate);
1359 putushort(denp[0].deCTime, ndirent.de_CTime);
1360 denp[0].deCHundredth = ndirent.de_CHun;
1361 putushort(denp[0].deADate, ndirent.de_ADate);
1362 putushort(denp[0].deMDate, ndirent.de_MDate);
1363 putushort(denp[0].deMTime, ndirent.de_MTime);
1364 pcl = pdep->de_StartCluster;
1365 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk)
1366 pcl = 0;
1367 putushort(denp[1].deStartCluster, pcl);
1368 putushort(denp[1].deCDate, ndirent.de_CDate);
1369 putushort(denp[1].deCTime, ndirent.de_CTime);
1370 denp[1].deCHundredth = ndirent.de_CHun;
1371 putushort(denp[1].deADate, ndirent.de_ADate);
1372 putushort(denp[1].deMDate, ndirent.de_MDate);
1373 putushort(denp[1].deMTime, ndirent.de_MTime);
1374 if (FAT32(pmp)) {
1375 putushort(denp[0].deHighClust, newcluster >> 16);
1376 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16);
1377 }
1378
1379 error = bwrite(bp);
1380 if (error)
1381 goto bad;
1382
1383 /*
1384 * Now build up a directory entry pointing to the newly allocated
1385 * cluster. This will be written to an empty slot in the parent
1386 * directory.
1387 */
1388#ifdef DIAGNOSTIC
2b69e610 1389 if ((cnp->cn_flags & CNP_HASBUF) == 0)
984263bc
MD
1390 panic("msdosfs_mkdir: no name");
1391#endif
1392 error = uniqdosname(pdep, cnp, ndirent.de_Name);
1393 if (error)
1394 goto bad;
1395
1396 ndirent.de_Attributes = ATTR_DIRECTORY;
1397 ndirent.de_LowerCase = 0;
1398 ndirent.de_StartCluster = newcluster;
1399 ndirent.de_FileSize = 0;
1400 ndirent.de_dev = pdep->de_dev;
1401 ndirent.de_devvp = pdep->de_devvp;
1402 error = createde(&ndirent, pdep, &dep, cnp);
1403 if (error)
1404 goto bad;
1405 *ap->a_vpp = DETOV(dep);
1406 return (0);
1407
1408bad:
1409 clusterfree(pmp, newcluster, NULL);
1410bad2:
1411 return (error);
1412}
1413
4625f023
CP
1414/*
1415 * msdosfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
1416 * struct componentname *a_cnp)
1417 */
984263bc 1418static int
4625f023 1419msdosfs_rmdir(struct vop_rmdir_args *ap)
984263bc 1420{
dadab5e9
MD
1421 struct vnode *vp = ap->a_vp;
1422 struct vnode *dvp = ap->a_dvp;
1423 struct componentname *cnp = ap->a_cnp;
1424 struct denode *ip, *dp;
1425 struct thread *td = cnp->cn_td;
984263bc
MD
1426 int error;
1427
1428 ip = VTODE(vp);
1429 dp = VTODE(dvp);
1430
1431 /*
1432 * Verify the directory is empty (and valid).
1433 * (Rmdir ".." won't be valid since
1434 * ".." will contain a reference to
1435 * the current directory and thus be
1436 * non-empty.)
1437 */
1438 error = 0;
1439 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) {
1440 error = ENOTEMPTY;
1441 goto out;
1442 }
1443 /*
1444 * Delete the entry from the directory. For dos filesystems this
1445 * gets rid of the directory entry on disk, the in memory copy
1446 * still exists but the de_refcnt is <= 0. This prevents it from
1447 * being found by deget(). When the vput() on dep is done we give
1448 * up access and eventually msdosfs_reclaim() will be called which
1449 * will remove it from the denode cache.
1450 */
1451 error = removede(dp, ip);
1452 if (error)
1453 goto out;
1454 /*
1455 * This is where we decrement the link count in the parent
1456 * directory. Since dos filesystems don't do this we just purge
1457 * the name cache.
1458 */
1459 cache_purge(dvp);
41a01a4d 1460 VOP_UNLOCK(dvp, NULL, 0, td);
984263bc
MD
1461 /*
1462 * Truncate the directory that is being deleted.
1463 */
3b568787 1464 error = detrunc(ip, (u_long)0, IO_SYNC, td);
984263bc
MD
1465 cache_purge(vp);
1466
41a01a4d 1467 vn_lock(dvp, NULL, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
1468out:
1469 return (error);
1470}
1471
1472/*
1473 * DOS filesystems don't know what symlinks are.
4625f023
CP
1474 *
1475 * msdosfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1476 * struct componentname *a_cnp, struct vattr *a_vap,
1477 * char *a_target)
984263bc
MD
1478 */
1479static int
4625f023 1480msdosfs_symlink(struct vop_symlink_args *ap)
984263bc
MD
1481{
1482 return (EOPNOTSUPP);
1483}
1484
4625f023
CP
1485/*
1486 * msdosfs_readdir(struct vnode *a_vp, struct uio *a_uio,
1487 * struct ucred *a_cred, int *a_eofflag, int *a_ncookies,
1488 * u_long **a_cookies)
1489 */
984263bc 1490static int
4625f023 1491msdosfs_readdir(struct vop_readdir_args *ap)
984263bc
MD
1492{
1493 int error = 0;
1494 int diff;
1495 long n;
1496 int blsize;
1497 long on;
1498 u_long cn;
1499 u_long fileno;
1500 u_long dirsperblk;
1501 long bias = 0;
1502 daddr_t bn, lbn;
1503 struct buf *bp;
1504 struct denode *dep = VTODE(ap->a_vp);
1505 struct msdosfsmount *pmp = dep->de_pmp;
1506 struct direntry *dentp;
1507 struct dirent dirbuf;
1508 struct uio *uio = ap->a_uio;
1509 u_long *cookies = NULL;
1510 int ncookies = 0;
1511 off_t offset, off;
1512 int chksum = -1;
1513
1514#ifdef MSDOSFS_DEBUG
1515 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n",
1516 ap->a_vp, uio, ap->a_cred, ap->a_eofflag);
1517#endif
1518
1519 /*
1520 * msdosfs_readdir() won't operate properly on regular files since
1521 * it does i/o only with the the filesystem vnode, and hence can
1522 * retrieve the wrong block from the buffer cache for a plain file.
1523 * So, fail attempts to readdir() on a plain file.
1524 */
1525 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0)
1526 return (ENOTDIR);
1527
1528 /*
1529 * To be safe, initialize dirbuf
1530 */
1531 bzero(dirbuf.d_name, sizeof(dirbuf.d_name));
1532
1533 /*
1534 * If the user buffer is smaller than the size of one dos directory
1535 * entry or the file offset is not a multiple of the size of a
1536 * directory entry, then we fail the read.
1537 */
1538 off = offset = uio->uio_offset;
1539 if (uio->uio_resid < sizeof(struct direntry) ||
1540 (offset & (sizeof(struct direntry) - 1)))
1541 return (EINVAL);
1542
1543 if (ap->a_ncookies) {
1544 ncookies = uio->uio_resid / 16;
1545 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP,
1546 M_WAITOK);
1547 *ap->a_cookies = cookies;
1548 *ap->a_ncookies = ncookies;
1549 }
1550
1551 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
1552
1553 /*
1554 * If they are reading from the root directory then, we simulate
1555 * the . and .. entries since these don't exist in the root
1556 * directory. We also set the offset bias to make up for having to
1557 * simulate these entries. By this I mean that at file offset 64 we
1558 * read the first entry in the root directory that lives on disk.
1559 */
1560 if (dep->de_StartCluster == MSDOSFSROOT
1561 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) {
1562#if 0
1563 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n",
1564 offset);
1565#endif
1566 bias = 2 * sizeof(struct direntry);
1567 if (offset < bias) {
1568 for (n = (int)offset / sizeof(struct direntry);
1569 n < 2; n++) {
1570 if (FAT32(pmp))
1571 dirbuf.d_fileno = cntobn(pmp,
1572 pmp->pm_rootdirblk)
1573 * dirsperblk;
1574 else
1575 dirbuf.d_fileno = 1;
1576 dirbuf.d_type = DT_DIR;
1577 switch (n) {
1578 case 0:
1579 dirbuf.d_namlen = 1;
1580 strcpy(dirbuf.d_name, ".");
1581 break;
1582 case 1:
1583 dirbuf.d_namlen = 2;
1584 strcpy(dirbuf.d_name, "..");
1585 break;
1586 }
1587 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf);
1588 if (uio->uio_resid < dirbuf.d_reclen)
1589 goto out;
1590 error = uiomove((caddr_t) &dirbuf,
1591 dirbuf.d_reclen, uio);
1592 if (error)
1593 goto out;
1594 offset += sizeof(struct direntry);
1595 off = offset;
1596 if (cookies) {
1597 *cookies++ = offset;
1598 if (--ncookies <= 0)
1599 goto out;
1600 }
1601 }
1602 }
1603 }
1604
1605 off = offset;
1606 while (uio->uio_resid > 0) {
1607 lbn = de_cluster(pmp, offset - bias);
1608 on = (offset - bias) & pmp->pm_crbomask;
1609 n = min(pmp->pm_bpcluster - on, uio->uio_resid);
1610 diff = dep->de_FileSize - (offset - bias);
1611 if (diff <= 0)
1612 break;
1613 n = min(n, diff);
1614 error = pcbmap(dep, lbn, &bn, &cn, &blsize);
1615 if (error)
1616 break;
3b568787 1617 error = bread(pmp->pm_devvp, bn, blsize, &bp);
984263bc
MD
1618 if (error) {
1619 brelse(bp);
1620 return (error);
1621 }
1622 n = min(n, blsize - bp->b_resid);
1623
1624 /*
1625 * Convert from dos directory entries to fs-independent
1626 * directory entries.
1627 */
1628 for (dentp = (struct direntry *)(bp->b_data + on);
1629 (char *)dentp < bp->b_data + on + n;
1630 dentp++, offset += sizeof(struct direntry)) {
1631#if 0
1632 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n",
1633 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes);
1634#endif
1635 /*
1636 * If this is an unused entry, we can stop.
1637 */
1638 if (dentp->deName[0] == SLOT_EMPTY) {
1639 brelse(bp);
1640 goto out;
1641 }
1642 /*
1643 * Skip deleted entries.
1644 */
1645 if (dentp->deName[0] == SLOT_DELETED) {
1646 chksum = -1;
1647 continue;
1648 }
1649
1650 /*
1651 * Handle Win95 long directory entries
1652 */
1653 if (dentp->deAttributes == ATTR_WIN95) {
1654 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME)
1655 continue;
1656 chksum = win2unixfn((struct winentry *)dentp,
1657 &dirbuf, chksum,
1658 pmp->pm_flags & MSDOSFSMNT_U2WTABLE,
1659 pmp->pm_u2w);
1660 continue;
1661 }
1662
1663 /*
1664 * Skip volume labels
1665 */
1666 if (dentp->deAttributes & ATTR_VOLUME) {
1667 chksum = -1;
1668 continue;
1669 }
1670 /*
1671 * This computation of d_fileno must match
1672 * the computation of va_fileid in
1673 * msdosfs_getattr.
1674 */
1675 if (dentp->deAttributes & ATTR_DIRECTORY) {
1676 fileno = getushort(dentp->deStartCluster);
1677 if (FAT32(pmp))
1678 fileno |= getushort(dentp->deHighClust) << 16;
1679 /* if this is the root directory */
1680 if (fileno == MSDOSFSROOT)
1681 if (FAT32(pmp))
1682 fileno = cntobn(pmp,
1683 pmp->pm_rootdirblk)
1684 * dirsperblk;
1685 else
1686 fileno = 1;
1687 else
1688 fileno = cntobn(pmp, fileno) * dirsperblk;
1689 dirbuf.d_fileno = fileno;
1690 dirbuf.d_type = DT_DIR;
1691 } else {
1692 dirbuf.d_fileno = offset / sizeof(struct direntry);
1693 dirbuf.d_type = DT_REG;
1694 }
1695 if (chksum != winChksum(dentp->deName))
1696 dirbuf.d_namlen = dos2unixfn(dentp->deName,
1697 (u_char *)dirbuf.d_name,
1698 dentp->deLowerCase |
1699 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ?
1700 (LCASE_BASE | LCASE_EXT) : 0),
1701 pmp->pm_flags & MSDOSFSMNT_U2WTABLE,
1702 pmp->pm_d2u,
1703 pmp->pm_flags & MSDOSFSMNT_ULTABLE,
1704 pmp->pm_ul);
1705 else
1706 dirbuf.d_name[dirbuf.d_namlen] = 0;
1707 chksum = -1;
1708 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf);
1709 if (uio->uio_resid < dirbuf.d_reclen) {
1710 brelse(bp);
1711 goto out;
1712 }
1713 error = uiomove((caddr_t) &dirbuf,
1714 dirbuf.d_reclen, uio);
1715 if (error) {
1716 brelse(bp);
1717 goto out;
1718 }
1719 if (cookies) {
1720 *cookies++ = offset + sizeof(struct direntry);
1721 if (--ncookies <= 0) {
1722 brelse(bp);
1723 goto out;
1724 }
1725 }
1726 off = offset + sizeof(struct direntry);
1727 }
1728 brelse(bp);
1729 }
1730out:
1731 /* Subtract unused cookies */
1732 if (ap->a_ncookies)
1733 *ap->a_ncookies -= ncookies;
1734
1735 uio->uio_offset = off;
1736
1737 /*
1738 * Set the eofflag (NFS uses it)
1739 */
1740 if (ap->a_eofflag) {
1741 if (dep->de_FileSize - (offset - bias) <= 0)
1742 *ap->a_eofflag = 1;
1743 else
1744 *ap->a_eofflag = 0;
1745 }
1746 return (error);
1747}
1748
1749/*
1750 * vp - address of vnode file the file
1751 * bn - which cluster we are interested in mapping to a filesystem block number.
1752 * vpp - returns the vnode for the block special file holding the filesystem
1753 * containing the file of interest
1754 * bnp - address of where to return the filesystem relative block number
4625f023
CP
1755 *
1756 * msdosfs_bmap(struct vnode *a_vp, daddr_t a_bn, struct vnode **a_vpp,
1757 * daddr_t *a_bnp, int *a_runp, int *a_runb)
984263bc
MD
1758 */
1759static int
4625f023 1760msdosfs_bmap(struct vop_bmap_args *ap)
984263bc
MD
1761{
1762 struct denode *dep = VTODE(ap->a_vp);
1763
1764 if (ap->a_vpp != NULL)
1765 *ap->a_vpp = dep->de_devvp;
1766 if (ap->a_bnp == NULL)
1767 return (0);
1768 if (ap->a_runp) {
1769 /*
1770 * Sequential clusters should be counted here.
1771 */
1772 *ap->a_runp = 0;
1773 }
1774 if (ap->a_runb) {
1775 *ap->a_runb = 0;
1776 }
1777 return (pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0));
1778}
1779
4625f023
CP
1780/*
1781 * msdosfs_strategy(struct vnode *a_vp, struct buf *a_bp)
1782 */
984263bc 1783static int
4625f023 1784msdosfs_strategy(struct vop_strategy_args *ap)
984263bc
MD
1785{
1786 struct buf *bp = ap->a_bp;
1787 struct denode *dep = VTODE(bp->b_vp);
1788 struct vnode *vp;
1789 int error = 0;
1790
1791 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR)
1792 panic("msdosfs_strategy: spec");
1793 /*
1794 * If we don't already know the filesystem relative block number
1795 * then get it using pcbmap(). If pcbmap() returns the block
1796 * number as -1 then we've got a hole in the file. DOS filesystems
1797 * don't allow files with holes, so we shouldn't ever see this.
1798 */
1799 if (bp->b_blkno == bp->b_lblkno) {
1800 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 0, 0);
1801 if (error) {
1802 bp->b_error = error;
1803 bp->b_flags |= B_ERROR;
1804 biodone(bp);
1805 return (error);
1806 }
1807 if ((long)bp->b_blkno == -1)
1808 vfs_bio_clrbuf(bp);
1809 }
1810 if (bp->b_blkno == -1) {
1811 biodone(bp);
1812 return (0);
1813 }
1814 /*
1815 * Read/write the block from/to the disk that contains the desired
1816 * file block.
1817 */
1818 vp = dep->de_devvp;
1819 bp->b_dev = vp->v_rdev;
1820 VOP_STRATEGY(vp, bp);
1821 return (0);
1822}
1823
4625f023
CP
1824/*
1825 * msdosfs_print(struct vnode *vp)
1826 */
984263bc 1827static int
4625f023 1828msdosfs_print(struct vop_print_args *ap)
984263bc
MD
1829{
1830 struct denode *dep = VTODE(ap->a_vp);
1831
1832 printf(
1833 "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ",
1834 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset);
1835 printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev));
1836 lockmgr_printinfo(&dep->de_lock);
1837 printf("\n");
1838 return (0);
1839}
1840
4625f023
CP
1841/*
1842 * msdosfs_pathconf(struct vnode *a_vp, int a_name, int *a_retval)
1843 */
984263bc 1844static int
4625f023 1845msdosfs_pathconf(struct vop_pathconf_args *ap)
984263bc
MD
1846{
1847 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp;
1848
1849 switch (ap->a_name) {
1850 case _PC_LINK_MAX:
1851 *ap->a_retval = 1;
1852 return (0);
1853 case _PC_NAME_MAX:
1854 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12;
1855 return (0);
1856 case _PC_PATH_MAX:
1857 *ap->a_retval = PATH_MAX;
1858 return (0);
1859 case _PC_CHOWN_RESTRICTED:
1860 *ap->a_retval = 1;
1861 return (0);
1862 case _PC_NO_TRUNC:
1863 *ap->a_retval = 0;
1864 return (0);
1865 default:
1866 return (EINVAL);
1867 }
1868 /* NOTREACHED */
1869}
1870
1871/*
1872 * get page routine
1873 *
1874 * XXX By default, wimp out... note that a_offset is ignored (and always
1875 * XXX has been).
1876 */
1877int
4625f023 1878msdosfs_getpages(struct vop_getpages_args *ap)
984263bc
MD
1879{
1880 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
1881 ap->a_reqpage);
1882}
1883
1884/*
1885 * put page routine
1886 *
1887 * XXX By default, wimp out... note that a_offset is ignored (and always
1888 * XXX has been).
1889 */
1890int
4625f023 1891msdosfs_putpages(struct vop_putpages_args *ap)
984263bc
MD
1892{
1893 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
1894 ap->a_sync, ap->a_rtvals);
1895}
1896
1897/* Global vfs data structures for msdosfs */
2d3e977e 1898struct vop_ops *msdosfs_vnode_vops;
984263bc 1899static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = {
2d3e977e
MD
1900 { &vop_default_desc, vop_defaultop },
1901 { &vop_access_desc, (void *) msdosfs_access },
1902 { &vop_bmap_desc, (void *) msdosfs_bmap },
1903 { &vop_cachedlookup_desc, (void *) msdosfs_lookup },
1904 { &vop_close_desc, (void *) msdosfs_close },
1905 { &vop_create_desc, (void *) msdosfs_create },
1906 { &vop_fsync_desc, (void *) msdosfs_fsync },
1907 { &vop_getattr_desc, (void *) msdosfs_getattr },
1908 { &vop_inactive_desc, (void *) msdosfs_inactive },
1909 { &vop_islocked_desc, (void *) vop_stdislocked },
1910 { &vop_link_desc, (void *) msdosfs_link },
1911 { &vop_lock_desc, (void *) vop_stdlock },
1912 { &vop_lookup_desc, (void *) vfs_cache_lookup },
1913 { &vop_mkdir_desc, (void *) msdosfs_mkdir },
1914 { &vop_mknod_desc, (void *) msdosfs_mknod },
1915 { &vop_pathconf_desc, (void *) msdosfs_pathconf },
1916 { &vop_print_desc, (void *) msdosfs_print },
1917 { &vop_read_desc, (void *) msdosfs_read },
1918 { &vop_readdir_desc, (void *) msdosfs_readdir },
1919 { &vop_reclaim_desc, (void *) msdosfs_reclaim },
1920 { &vop_remove_desc, (void *) msdosfs_remove },
1921 { &vop_rename_desc, (void *) msdosfs_rename },
1922 { &vop_rmdir_desc, (void *) msdosfs_rmdir },
1923 { &vop_setattr_desc, (void *) msdosfs_setattr },
1924 { &vop_strategy_desc, (void *) msdosfs_strategy },
1925 { &vop_symlink_desc, (void *) msdosfs_symlink },
1926 { &vop_unlock_desc, (void *) vop_stdunlock },
1927 { &vop_write_desc, (void *) msdosfs_write },
1928 { &vop_getpages_desc, (void *) msdosfs_getpages },
1929 { &vop_putpages_desc, (void *) msdosfs_putpages },
984263bc
MD
1930 { NULL, NULL }
1931};
1932static struct vnodeopv_desc msdosfs_vnodeop_opv_desc =
2d3e977e 1933 { &msdosfs_vnode_vops, msdosfs_vnodeop_entries };
984263bc
MD
1934
1935VNODEOP_SET(msdosfs_vnodeop_opv_desc);