Add missing commit for the VM load heuristic and page allocation rate
[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 $ */
81b5c339 2/* $DragonFly: src/sys/vfs/msdosfs/msdosfs_vnops.c,v 1.29 2006/02/17 19:18:07 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>
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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>
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
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74#include "bpb.h"
75#include "direntry.h"
76#include "denode.h"
77#include "msdosfsmount.h"
78#include "fat.h"
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79
80#define DOS_FILESIZE_MAX 0xffffffff
81
82/*
83 * Prototypes for MSDOSFS vnode operations
84 */
e62afb5f
MD
85static int msdosfs_create (struct vop_old_create_args *);
86static int msdosfs_mknod (struct vop_old_mknod_args *);
a6ee311a
RG
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 *);
e62afb5f
MD
94static int msdosfs_remove (struct vop_old_remove_args *);
95static int msdosfs_link (struct vop_old_link_args *);
96static int msdosfs_rename (struct vop_old_rename_args *);
97static int msdosfs_mkdir (struct vop_old_mkdir_args *);
98static int msdosfs_rmdir (struct vop_old_rmdir_args *);
99static int msdosfs_symlink (struct vop_old_symlink_args *);
a6ee311a
RG
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 *);
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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
fad57d0e 128 * created is locked. We must release before we return.
4625f023
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129 *
130 * msdosfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
131 * struct componentname *a_cnp, struct vattr *a_vap)
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132 */
133static int
e62afb5f 134msdosfs_create(struct vop_old_create_args *ap)
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135{
136 struct componentname *cnp = ap->a_cnp;
137 struct denode ndirent;
138 struct denode *dep;
139 struct denode *pdep = VTODE(ap->a_dvp);
140 struct timespec ts;
141 int error;
142
143#ifdef MSDOSFS_DEBUG
144 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap);
145#endif
146
147 /*
148 * If this is the root directory and there is no space left we
149 * can't do anything. This is because the root directory can not
150 * change size.
151 */
152 if (pdep->de_StartCluster == MSDOSFSROOT
153 && pdep->de_fndoffset >= pdep->de_FileSize) {
154 error = ENOSPC;
155 goto bad;
156 }
157
158 /*
159 * Create a directory entry for the file, then call createde() to
160 * have it installed. NOTE: DOS files are always executable. We
161 * use the absence of the owner write bit to make the file
162 * readonly.
163 */
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MD
164 bzero(&ndirent, sizeof(ndirent));
165 error = uniqdosname(pdep, cnp, ndirent.de_Name);
166 if (error)
167 goto bad;
168
169 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ?
170 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY;
171 ndirent.de_LowerCase = 0;
172 ndirent.de_StartCluster = 0;
173 ndirent.de_FileSize = 0;
174 ndirent.de_dev = pdep->de_dev;
175 ndirent.de_devvp = pdep->de_devvp;
176 ndirent.de_pmp = pdep->de_pmp;
177 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
178 getnanotime(&ts);
179 DETIMES(&ndirent, &ts, &ts, &ts);
180 error = createde(&ndirent, pdep, &dep, cnp);
181 if (error)
182 goto bad;
183 *ap->a_vpp = DETOV(dep);
184 return (0);
185
186bad:
187 return (error);
188}
189
4625f023
CP
190/*
191 * msdosfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
192 * struct componentname *a_cnp, struct vattr *a_vap)
193 */
984263bc 194static int
e62afb5f 195msdosfs_mknod(struct vop_old_mknod_args *ap)
984263bc 196{
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MD
197 switch (ap->a_vap->va_type) {
198 case VDIR:
e62afb5f 199 return (msdosfs_mkdir((struct vop_old_mkdir_args *)ap));
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200 break;
201
202 case VREG:
e62afb5f 203 return (msdosfs_create((struct vop_old_create_args *)ap));
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204 break;
205
206 default:
207 return (EINVAL);
208 }
209 /* NOTREACHED */
210}
211
4625f023
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212/*
213 * msdosfs_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
214 * struct thread *a_td)
215 */
984263bc 216static int
4625f023 217msdosfs_close(struct vop_close_args *ap)
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MD
218{
219 struct vnode *vp = ap->a_vp;
220 struct denode *dep = VTODE(vp);
221 struct timespec ts;
222
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223 if (vp->v_usecount > 1) {
224 getnanotime(&ts);
8a8d5d85
MD
225 if (vp->v_usecount > 1) {
226 DETIMES(dep, &ts, &ts, &ts);
227 }
984263bc 228 }
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229 return 0;
230}
231
4625f023
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232/*
233 * msdosfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
234 * struct thread *a_td)
235 */
984263bc 236static int
4625f023 237msdosfs_access(struct vop_access_args *ap)
984263bc
MD
238{
239 struct vnode *vp = ap->a_vp;
240 struct denode *dep = VTODE(ap->a_vp);
241 struct msdosfsmount *pmp = dep->de_pmp;
242 struct ucred *cred = ap->a_cred;
243 mode_t mask, file_mode, mode = ap->a_mode;
0e99e805 244 gid_t *gp;
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MD
245 int i;
246
247 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) |
248 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH));
249 file_mode &= pmp->pm_mask;
250
251 /*
252 * Disallow write attempts on read-only file systems;
253 * unless the file is a socket, fifo, or a block or
254 * character device resident on the file system.
255 */
256 if (mode & VWRITE) {
257 switch (vp->v_type) {
258 case VDIR:
259 case VLNK:
260 case VREG:
261 if (vp->v_mount->mnt_flag & MNT_RDONLY)
262 return (EROFS);
263 break;
264 default:
265 break;
266 }
267 }
268
269 /* User id 0 always gets access. */
270 if (cred->cr_uid == 0)
271 return 0;
272
273 mask = 0;
274
275 /* Otherwise, check the owner. */
276 if (cred->cr_uid == pmp->pm_uid) {
277 if (mode & VEXEC)
278 mask |= S_IXUSR;
279 if (mode & VREAD)
280 mask |= S_IRUSR;
281 if (mode & VWRITE)
282 mask |= S_IWUSR;
283 return (file_mode & mask) == mask ? 0 : EACCES;
284 }
285
286 /* Otherwise, check the groups. */
287 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
288 if (pmp->pm_gid == *gp) {
289 if (mode & VEXEC)
290 mask |= S_IXGRP;
291 if (mode & VREAD)
292 mask |= S_IRGRP;
293 if (mode & VWRITE)
294 mask |= S_IWGRP;
295 return (file_mode & mask) == mask ? 0 : EACCES;
296 }
297
298 /* Otherwise, check everyone else. */
299 if (mode & VEXEC)
300 mask |= S_IXOTH;
301 if (mode & VREAD)
302 mask |= S_IROTH;
303 if (mode & VWRITE)
304 mask |= S_IWOTH;
305 return (file_mode & mask) == mask ? 0 : EACCES;
306}
307
4625f023
CP
308/*
309 * msdosfs_getattr(struct vnode *a_vp, struct vattr *a_vap,
310 * struct ucred *a_cred, struct thread *a_td)
311 */
984263bc 312static int
4625f023 313msdosfs_getattr(struct vop_getattr_args *ap)
984263bc
MD
314{
315 struct denode *dep = VTODE(ap->a_vp);
316 struct msdosfsmount *pmp = dep->de_pmp;
317 struct vattr *vap = ap->a_vap;
318 mode_t mode;
319 struct timespec ts;
320 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
321 u_long fileid;
322
323 getnanotime(&ts);
324 DETIMES(dep, &ts, &ts, &ts);
325 vap->va_fsid = dev2udev(dep->de_dev);
326 /*
327 * The following computation of the fileid must be the same as that
328 * used in msdosfs_readdir() to compute d_fileno. If not, pwd
329 * doesn't work.
330 */
331 if (dep->de_Attributes & ATTR_DIRECTORY) {
332 fileid = cntobn(pmp, dep->de_StartCluster) * dirsperblk;
333 if (dep->de_StartCluster == MSDOSFSROOT)
334 fileid = 1;
335 } else {
336 fileid = cntobn(pmp, dep->de_dirclust) * dirsperblk;
337 if (dep->de_dirclust == MSDOSFSROOT)
338 fileid = roottobn(pmp, 0) * dirsperblk;
339 fileid += dep->de_diroffset / sizeof(struct direntry);
340 }
341 vap->va_fileid = fileid;
342 if ((dep->de_Attributes & ATTR_READONLY) == 0)
343 mode = S_IRWXU|S_IRWXG|S_IRWXO;
344 else
345 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
346 vap->va_mode = mode & pmp->pm_mask;
347 vap->va_uid = pmp->pm_uid;
348 vap->va_gid = pmp->pm_gid;
349 vap->va_nlink = 1;
350 vap->va_rdev = 0;
351 vap->va_size = dep->de_FileSize;
352 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime);
353 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) {
354 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime);
355 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime);
356 } else {
357 vap->va_atime = vap->va_mtime;
358 vap->va_ctime = vap->va_mtime;
359 }
360 vap->va_flags = 0;
361 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0)
362 vap->va_flags |= SF_ARCHIVED;
363 vap->va_gen = 0;
364 vap->va_blocksize = pmp->pm_bpcluster;
365 vap->va_bytes =
366 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask;
367 vap->va_type = ap->a_vp->v_type;
368 vap->va_filerev = dep->de_modrev;
369 return (0);
370}
371
4625f023
CP
372/*
373 * msdosfs_setattr(struct vnode *a_vp, struct vattr *a_vap,
374 * struct ucred *a_cred, struct thread *a_td)
375 */
984263bc 376static int
4625f023 377msdosfs_setattr(struct vop_setattr_args *ap)
984263bc
MD
378{
379 struct vnode *vp = ap->a_vp;
380 struct denode *dep = VTODE(ap->a_vp);
381 struct msdosfsmount *pmp = dep->de_pmp;
382 struct vattr *vap = ap->a_vap;
383 struct ucred *cred = ap->a_cred;
384 int error = 0;
385
386#ifdef MSDOSFS_DEBUG
387 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n",
dadab5e9 388 ap->a_vp, vap, cred, ap->a_td);
984263bc
MD
389#endif
390
391 /*
392 * Check for unsettable attributes.
393 */
394 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
395 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
396 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
397 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
398#ifdef MSDOSFS_DEBUG
399 printf("msdosfs_setattr(): returning EINVAL\n");
400 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n",
401 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid);
402 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n",
403 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen);
404 printf(" va_uid %x, va_gid %x\n",
405 vap->va_uid, vap->va_gid);
406#endif
407 return (EINVAL);
408 }
409 if (vap->va_flags != VNOVAL) {
410 if (vp->v_mount->mnt_flag & MNT_RDONLY)
411 return (EROFS);
412 if (cred->cr_uid != pmp->pm_uid &&
dadab5e9 413 (error = suser_cred(cred, PRISON_ROOT)))
984263bc
MD
414 return (error);
415 /*
416 * We are very inconsistent about handling unsupported
417 * attributes. We ignored the access time and the
418 * read and execute bits. We were strict for the other
419 * attributes.
420 *
421 * Here we are strict, stricter than ufs in not allowing
422 * users to attempt to set SF_SETTABLE bits or anyone to
423 * set unsupported bits. However, we ignore attempts to
424 * set ATTR_ARCHIVE for directories `cp -pr' from a more
425 * sensible file system attempts it a lot.
426 */
427 if (cred->cr_uid != 0) {
428 if (vap->va_flags & SF_SETTABLE)
429 return EPERM;
430 }
431 if (vap->va_flags & ~SF_ARCHIVED)
432 return EOPNOTSUPP;
433 if (vap->va_flags & SF_ARCHIVED)
434 dep->de_Attributes &= ~ATTR_ARCHIVE;
435 else if (!(dep->de_Attributes & ATTR_DIRECTORY))
436 dep->de_Attributes |= ATTR_ARCHIVE;
437 dep->de_flag |= DE_MODIFIED;
438 }
439
440 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
441 uid_t uid;
442 gid_t gid;
443
444 if (vp->v_mount->mnt_flag & MNT_RDONLY)
445 return (EROFS);
446 uid = vap->va_uid;
447 if (uid == (uid_t)VNOVAL)
448 uid = pmp->pm_uid;
449 gid = vap->va_gid;
450 if (gid == (gid_t)VNOVAL)
451 gid = pmp->pm_gid;
452 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid ||
453 (gid != pmp->pm_gid && !groupmember(gid, cred))) &&
dadab5e9 454 (error = suser_cred(cred, PRISON_ROOT)))
984263bc
MD
455 return error;
456 if (uid != pmp->pm_uid || gid != pmp->pm_gid)
457 return EINVAL;
458 }
459
460 if (vap->va_size != VNOVAL) {
461 /*
462 * Disallow write attempts on read-only file systems;
463 * unless the file is a socket, fifo, or a block or
464 * character device resident on the file system.
465 */
466 switch (vp->v_type) {
467 case VDIR:
468 return (EISDIR);
469 /* NOT REACHED */
470 case VLNK:
471 case VREG:
472 if (vp->v_mount->mnt_flag & MNT_RDONLY)
473 return (EROFS);
474 break;
475 default:
476 break;
477 }
3b568787 478 error = detrunc(dep, vap->va_size, 0, ap->a_td);
984263bc
MD
479 if (error)
480 return error;
481 }
482 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
483 if (vp->v_mount->mnt_flag & MNT_RDONLY)
484 return (EROFS);
485 if (cred->cr_uid != pmp->pm_uid &&
dadab5e9 486 (error = suser_cred(cred, PRISON_ROOT)) &&
984263bc 487 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
dadab5e9 488 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_td))))
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MD
489 return (error);
490 if (vp->v_type != VDIR) {
491 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 &&
492 vap->va_atime.tv_sec != VNOVAL) {
493 dep->de_flag &= ~DE_ACCESS;
494 unix2dostime(&vap->va_atime, &dep->de_ADate,
495 NULL, NULL);
496 }
497 if (vap->va_mtime.tv_sec != VNOVAL) {
498 dep->de_flag &= ~DE_UPDATE;
499 unix2dostime(&vap->va_mtime, &dep->de_MDate,
500 &dep->de_MTime, NULL);
501 }
502 dep->de_Attributes |= ATTR_ARCHIVE;
503 dep->de_flag |= DE_MODIFIED;
504 }
505 }
506 /*
507 * DOS files only have the ability to have their writability
508 * attribute set, so we use the owner write bit to set the readonly
509 * attribute.
510 */
511 if (vap->va_mode != (mode_t)VNOVAL) {
512 if (vp->v_mount->mnt_flag & MNT_RDONLY)
513 return (EROFS);
514 if (cred->cr_uid != pmp->pm_uid &&
dadab5e9 515 (error = suser_cred(cred, PRISON_ROOT)))
984263bc
MD
516 return (error);
517 if (vp->v_type != VDIR) {
518 /* We ignore the read and execute bits. */
519 if (vap->va_mode & VWRITE)
520 dep->de_Attributes &= ~ATTR_READONLY;
521 else
522 dep->de_Attributes |= ATTR_READONLY;
523 dep->de_Attributes |= ATTR_ARCHIVE;
524 dep->de_flag |= DE_MODIFIED;
525 }
526 }
527 return (deupdat(dep, 1));
528}
529
4625f023
CP
530/*
531 * msdosfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
532 * struct ucred *a_cred)
533 */
984263bc 534static int
4625f023 535msdosfs_read(struct vop_read_args *ap)
984263bc
MD
536{
537 int error = 0;
538 int blsize;
539 int isadir;
540 int orig_resid;
541 u_int n;
542 u_long diff;
543 u_long on;
544 daddr_t lbn;
545 daddr_t rablock;
546 int rasize;
547 int seqcount;
548 struct buf *bp;
549 struct vnode *vp = ap->a_vp;
550 struct denode *dep = VTODE(vp);
551 struct msdosfsmount *pmp = dep->de_pmp;
552 struct uio *uio = ap->a_uio;
553
554 if (uio->uio_offset < 0)
555 return (EINVAL);
556
557 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX)
558 return (0);
559 /*
560 * If they didn't ask for any data, then we are done.
561 */
562 orig_resid = uio->uio_resid;
563 if (orig_resid <= 0)
564 return (0);
565
566 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
567
568 isadir = dep->de_Attributes & ATTR_DIRECTORY;
569 do {
570 if (uio->uio_offset >= dep->de_FileSize)
571 break;
572 lbn = de_cluster(pmp, uio->uio_offset);
573 /*
574 * If we are operating on a directory file then be sure to
575 * do i/o with the vnode for the filesystem instead of the
576 * vnode for the directory.
577 */
578 if (isadir) {
579 /* convert cluster # to block # */
580 error = pcbmap(dep, lbn, &lbn, 0, &blsize);
581 if (error == E2BIG) {
582 error = EINVAL;
583 break;
584 } else if (error)
585 break;
3b568787 586 error = bread(pmp->pm_devvp, lbn, blsize, &bp);
984263bc
MD
587 } else {
588 blsize = pmp->pm_bpcluster;
589 rablock = lbn + 1;
590 if (seqcount > 1 &&
591 de_cn2off(pmp, rablock) < dep->de_FileSize) {
592 rasize = pmp->pm_bpcluster;
593 error = breadn(vp, lbn, blsize,
3b568787 594 &rablock, &rasize, 1, &bp);
984263bc 595 } else {
3b568787 596 error = bread(vp, lbn, blsize, &bp);
984263bc
MD
597 }
598 }
599 if (error) {
600 brelse(bp);
601 break;
602 }
603 on = uio->uio_offset & pmp->pm_crbomask;
604 diff = pmp->pm_bpcluster - on;
605 n = diff > uio->uio_resid ? uio->uio_resid : diff;
606 diff = dep->de_FileSize - uio->uio_offset;
607 if (diff < n)
608 n = diff;
609 diff = blsize - bp->b_resid;
610 if (diff < n)
611 n = diff;
612 error = uiomove(bp->b_data + on, (int) n, uio);
613 brelse(bp);
614 } while (error == 0 && uio->uio_resid > 0 && n != 0);
615 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) &&
616 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0)
617 dep->de_flag |= DE_ACCESS;
618 return (error);
619}
620
621/*
622 * Write data to a file or directory.
4625f023
CP
623 *
624 * msdosfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
625 * struct ucred *a_cred)
984263bc
MD
626 */
627static int
4625f023 628msdosfs_write(struct vop_write_args *ap)
984263bc
MD
629{
630 int n;
631 int croffset;
632 int resid;
633 u_long osize;
634 int error = 0;
635 u_long count;
636 daddr_t bn, lastcn;
637 struct buf *bp;
638 int ioflag = ap->a_ioflag;
639 struct uio *uio = ap->a_uio;
dadab5e9 640 struct thread *td = uio->uio_td;
984263bc
MD
641 struct vnode *vp = ap->a_vp;
642 struct vnode *thisvp;
643 struct denode *dep = VTODE(vp);
644 struct msdosfsmount *pmp = dep->de_pmp;
049d6e6d 645 struct proc *p = (td ? td->td_proc : NULL);
984263bc
MD
646
647#ifdef MSDOSFS_DEBUG
648 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n",
649 vp, uio, ioflag, cred);
650 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n",
651 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster);
652#endif
653
654 switch (vp->v_type) {
655 case VREG:
656 if (ioflag & IO_APPEND)
657 uio->uio_offset = dep->de_FileSize;
658 thisvp = vp;
659 break;
660 case VDIR:
661 return EISDIR;
662 default:
663 panic("msdosfs_write(): bad file type");
664 }
665
666 if (uio->uio_offset < 0)
667 return (EFBIG);
668
669 if (uio->uio_resid == 0)
670 return (0);
671
672 /*
673 * If they've exceeded their filesize limit, tell them about it.
674 */
675 if (p &&
676 ((uoff_t)uio->uio_offset + uio->uio_resid >
677 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) {
678 psignal(p, SIGXFSZ);
679 return (EFBIG);
680 }
681
682 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX)
683 return (EFBIG);
684
685 /*
686 * If the offset we are starting the write at is beyond the end of
687 * the file, then they've done a seek. Unix filesystems allow
688 * files with holes in them, DOS doesn't so we must fill the hole
689 * with zeroed blocks.
690 */
691 if (uio->uio_offset > dep->de_FileSize) {
3b568787 692 error = deextend(dep, uio->uio_offset);
984263bc
MD
693 if (error)
694 return (error);
695 }
696
697 /*
698 * Remember some values in case the write fails.
699 */
700 resid = uio->uio_resid;
701 osize = dep->de_FileSize;
702
703 /*
704 * If we write beyond the end of the file, extend it to its ultimate
705 * size ahead of the time to hopefully get a contiguous area.
706 */
707 if (uio->uio_offset + resid > osize) {
708 count = de_clcount(pmp, uio->uio_offset + resid) -
709 de_clcount(pmp, osize);
710 error = extendfile(dep, count, NULL, NULL, 0);
711 if (error && (error != ENOSPC || (ioflag & IO_UNIT)))
712 goto errexit;
713 lastcn = dep->de_fc[FC_LASTFC].fc_frcn;
714 } else
715 lastcn = de_clcount(pmp, osize) - 1;
716
717 do {
718 if (de_cluster(pmp, uio->uio_offset) > lastcn) {
719 error = ENOSPC;
720 break;
721 }
722
723 croffset = uio->uio_offset & pmp->pm_crbomask;
724 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset);
725 if (uio->uio_offset + n > dep->de_FileSize) {
726 dep->de_FileSize = uio->uio_offset + n;
727 /* The object size needs to be set before buffer is allocated */
728 vnode_pager_setsize(vp, dep->de_FileSize);
729 }
730
731 bn = de_cluster(pmp, uio->uio_offset);
732 if ((uio->uio_offset & pmp->pm_crbomask) == 0
733 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid)
734 > de_cluster(pmp, uio->uio_offset)
735 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) {
736 /*
737 * If either the whole cluster gets written,
738 * or we write the cluster from its start beyond EOF,
739 * then no need to read data from disk.
740 */
741 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0);
742 clrbuf(bp);
743 /*
744 * Do the bmap now, since pcbmap needs buffers
745 * for the fat table. (see msdosfs_strategy)
746 */
81b5c339
MD
747 if (bp->b_bio2.bio_blkno == (daddr_t)-1) {
748 error = pcbmap(dep, bp->b_lblkno,
749 &bp->b_bio2.bio_blkno,
750 0, 0);
984263bc 751 if (error)
81b5c339 752 bp->b_bio2.bio_blkno = (daddr_t)-1;
984263bc 753 }
81b5c339 754 if (bp->b_bio2.bio_blkno == (daddr_t)-1) {
984263bc
MD
755 brelse(bp);
756 if (!error)
757 error = EIO; /* XXX */
758 break;
759 }
760 } else {
761 /*
762 * The block we need to write into exists, so read it in.
763 */
3b568787 764 error = bread(thisvp, bn, pmp->pm_bpcluster, &bp);
984263bc
MD
765 if (error) {
766 brelse(bp);
767 break;
768 }
769 }
770
771 /*
772 * Should these vnode_pager_* functions be done on dir
773 * files?
774 */
775
776 /*
777 * Copy the data from user space into the buf header.
778 */
779 error = uiomove(bp->b_data + croffset, n, uio);
780 if (error) {
781 brelse(bp);
782 break;
783 }
784
785 /*
786 * If they want this synchronous then write it and wait for
787 * it. Otherwise, if on a cluster boundary write it
788 * asynchronously so we can move on to the next block
789 * without delay. Otherwise do a delayed write because we
790 * may want to write somemore into the block later.
791 */
792 if (ioflag & IO_SYNC)
b1ce5639 793 bwrite(bp);
984263bc
MD
794 else if (n + croffset == pmp->pm_bpcluster)
795 bawrite(bp);
796 else
797 bdwrite(bp);
798 dep->de_flag |= DE_UPDATE;
799 } while (error == 0 && uio->uio_resid > 0);
800
801 /*
802 * If the write failed and they want us to, truncate the file back
803 * to the size it was before the write was attempted.
804 */
805errexit:
806 if (error) {
807 if (ioflag & IO_UNIT) {
3b568787 808 detrunc(dep, osize, ioflag & IO_SYNC, NULL);
984263bc
MD
809 uio->uio_offset -= resid - uio->uio_resid;
810 uio->uio_resid = resid;
811 } else {
3b568787 812 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NULL);
984263bc
MD
813 if (uio->uio_resid != resid)
814 error = 0;
815 }
816 } else if (ioflag & IO_SYNC)
817 error = deupdat(dep, 1);
818 return (error);
819}
820
821/*
822 * Flush the blocks of a file to disk.
823 *
824 * This function is worthless for vnodes that represent directories. Maybe we
825 * could just do a sync if they try an fsync on a directory file.
4625f023
CP
826 *
827 * msdosfs_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor,
828 * struct thread *a_td)
984263bc
MD
829 */
830static int
4625f023 831msdosfs_fsync(struct vop_fsync_args *ap)
984263bc
MD
832{
833 struct vnode *vp = ap->a_vp;
984263bc
MD
834
835 /*
836 * Flush all dirty buffers associated with a vnode.
837 */
6bae6177 838#ifdef DIAGNOSTIC
984263bc 839loop:
6bae6177
MD
840#endif
841 vfsync(vp, ap->a_waitfor, 0, (daddr_t)-1, NULL, NULL);
984263bc 842#ifdef DIAGNOSTIC
6bae6177 843 if (ap->a_waitfor == MNT_WAIT && !RB_EMPTY(&vp->v_rbdirty_tree)) {
984263bc
MD
844 vprint("msdosfs_fsync: dirty", vp);
845 goto loop;
846 }
847#endif
984263bc
MD
848 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT));
849}
850
4625f023
CP
851/*
852 * msdosfs_remove(struct vnode *a_dvp, struct vnode *a_vp,
853 * struct componentname *a_cnp)
854 */
984263bc 855static int
e62afb5f 856msdosfs_remove(struct vop_old_remove_args *ap)
984263bc
MD
857{
858 struct denode *dep = VTODE(ap->a_vp);
859 struct denode *ddep = VTODE(ap->a_dvp);
860 int error;
861
862 if (ap->a_vp->v_type == VDIR)
863 error = EPERM;
864 else
865 error = removede(ddep, dep);
866#ifdef MSDOSFS_DEBUG
867 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount);
868#endif
869 return (error);
870}
871
872/*
873 * DOS filesystems don't know what links are. But since we already called
874 * msdosfs_lookup() with create and lockparent, the parent is locked so we
875 * have to free it before we return the error.
4625f023
CP
876 *
877 * msdosfs_link(struct vnode *a_tdvp, struct vnode *a_vp,
878 * struct componentname *a_cnp)
984263bc
MD
879 */
880static int
e62afb5f 881msdosfs_link(struct vop_old_link_args *ap)
984263bc
MD
882{
883 return (EOPNOTSUPP);
884}
885
886/*
887 * Renames on files require moving the denode to a new hash queue since the
888 * denode's location is used to compute which hash queue to put the file
889 * in. Unless it is a rename in place. For example "mv a b".
890 *
891 * What follows is the basic algorithm:
892 *
893 * if (file move) {
894 * if (dest file exists) {
895 * remove dest file
896 * }
897 * if (dest and src in same directory) {
898 * rewrite name in existing directory slot
899 * } else {
900 * write new entry in dest directory
901 * update offset and dirclust in denode
902 * move denode to new hash chain
903 * clear old directory entry
904 * }
905 * } else {
906 * directory move
907 * if (dest directory exists) {
908 * if (dest is not empty) {
909 * return ENOTEMPTY
910 * }
911 * remove dest directory
912 * }
913 * if (dest and src in same directory) {
914 * rewrite name in existing entry
915 * } else {
916 * be sure dest is not a child of src directory
917 * write entry in dest directory
918 * update "." and ".." in moved directory
919 * clear old directory entry for moved directory
920 * }
921 * }
922 *
923 * On entry:
924 * source's parent directory is unlocked
925 * source file or directory is unlocked
926 * destination's parent directory is locked
927 * destination file or directory is locked if it exists
928 *
929 * On exit:
930 * all denodes should be released
931 *
932 * Notes:
933 * I'm not sure how the memory containing the pathnames pointed at by the
934 * componentname structures is freed, there may be some memory bleeding
935 * for each rename done.
4625f023
CP
936 *
937 * msdosfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
938 * struct componentname *a_fcnp, struct vnode *a_tdvp,
939 * struct vnode *a_tvp, struct componentname *a_tcnp)
984263bc
MD
940 */
941static int
e62afb5f 942msdosfs_rename(struct vop_old_rename_args *ap)
984263bc
MD
943{
944 struct vnode *tdvp = ap->a_tdvp;
945 struct vnode *fvp = ap->a_fvp;
946 struct vnode *fdvp = ap->a_fdvp;
947 struct vnode *tvp = ap->a_tvp;
948 struct componentname *tcnp = ap->a_tcnp;
949 struct componentname *fcnp = ap->a_fcnp;
dadab5e9 950 struct thread *td = fcnp->cn_td;
984263bc
MD
951 struct denode *ip, *xp, *dp, *zp;
952 u_char toname[11], oldname[11];
953 u_long from_diroffset, to_diroffset;
954 u_char to_count;
955 int doingdirectory = 0, newparent = 0;
956 int error;
957 u_long cn;
958 daddr_t bn;
959 struct denode *fddep; /* from file's parent directory */
960 struct msdosfsmount *pmp;
961 struct direntry *dotdotp;
962 struct buf *bp;
963
964 fddep = VTODE(ap->a_fdvp);
965 pmp = fddep->de_pmp;
966
967 pmp = VFSTOMSDOSFS(fdvp->v_mount);
968
984263bc
MD
969 /*
970 * Check for cross-device rename.
971 */
972 if ((fvp->v_mount != tdvp->v_mount) ||
973 (tvp && (fvp->v_mount != tvp->v_mount))) {
974 error = EXDEV;
975abortit:
976 if (tdvp == tvp)
977 vrele(tdvp);
978 else
979 vput(tdvp);
980 if (tvp)
981 vput(tvp);
982 vrele(fdvp);
983 vrele(fvp);
984 return (error);
985 }
986
987 /*
988 * If source and dest are the same, do nothing.
989 */
990 if (tvp == fvp) {
991 error = 0;
992 goto abortit;
993 }
994
fad57d0e
MD
995 /*
996 * fvp, fdvp are unlocked, tvp, tdvp are locked. Lock fvp and note
997 * that we have to unlock it to use the abortit target.
998 */
5fd012e0 999 error = vn_lock(fvp, LK_EXCLUSIVE, td);
984263bc
MD
1000 if (error)
1001 goto abortit;
1002 dp = VTODE(fdvp);
1003 ip = VTODE(fvp);
1004
1005 /*
1006 * Be sure we are not renaming ".", "..", or an alias of ".". This
1007 * leads to a crippled directory tree. It's pretty tough to do a
1008 * "ls" or "pwd" with the "." directory entry missing, and "cd .."
1009 * doesn't work if the ".." entry is missing.
1010 */
1011 if (ip->de_Attributes & ATTR_DIRECTORY) {
1012 /*
1013 * Avoid ".", "..", and aliases of "." for obvious reasons.
1014 */
1015 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
1016 dp == ip ||
2b69e610
MD
1017 (fcnp->cn_flags & CNP_ISDOTDOT) ||
1018 (tcnp->cn_flags & CNP_ISDOTDOT) ||
984263bc 1019 (ip->de_flag & DE_RENAME)) {
5fd012e0 1020 VOP_UNLOCK(fvp, 0, td);
984263bc
MD
1021 error = EINVAL;
1022 goto abortit;
1023 }
1024 ip->de_flag |= DE_RENAME;
1025 doingdirectory++;
1026 }
1027
1028 /*
fad57d0e
MD
1029 * fvp locked, fdvp unlocked, tvp, tdvp locked. DE_RENAME only
1030 * set if doingdirectory. We will get fvp unlocked in fairly
1031 * short order. dp and xp must be setup and fvp must be unlocked
1032 * for the out and bad targets to work properly.
984263bc
MD
1033 */
1034 dp = VTODE(tdvp);
1035 xp = tvp ? VTODE(tvp) : NULL;
fad57d0e 1036
984263bc
MD
1037 /*
1038 * Remember direntry place to use for destination
1039 */
1040 to_diroffset = dp->de_fndoffset;
1041 to_count = dp->de_fndcnt;
1042
1043 /*
1044 * If ".." must be changed (ie the directory gets a new
1045 * parent) then the source directory must not be in the
1046 * directory heirarchy above the target, as this would
1047 * orphan everything below the source directory. Also
1048 * the user must have write permission in the source so
1049 * as to be able to change "..". We must repeat the call
1050 * to namei, as the parent directory is unlocked by the
1051 * call to doscheckpath().
1052 */
dadab5e9 1053 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_td);
5fd012e0 1054 VOP_UNLOCK(fvp, 0, td);
984263bc
MD
1055 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster)
1056 newparent = 1;
fad57d0e
MD
1057
1058 /*
1059 * ok. fvp, fdvp unlocked, tvp, tdvp locked. tvp may be NULL.
1060 * DE_RENAME only set if doingdirectory.
1061 */
984263bc
MD
1062 if (doingdirectory && newparent) {
1063 if (error) /* write access check above */
1064 goto bad;
fad57d0e 1065 if (xp != NULL) {
984263bc 1066 vput(tvp);
fad57d0e
MD
1067 xp = NULL;
1068 }
984263bc 1069 /*
fad57d0e
MD
1070 * checkpath vput's tdvp (VTOI(dp)) on return no matter what,
1071 * get an extra ref so we wind up with just an unlocked, ref'd
1072 * tdvp. The 'out' target skips tvp and tdvp cleanups (tdvp
1073 * isn't locked so we can't use the out target).
984263bc 1074 */
fad57d0e 1075 vref(tdvp);
984263bc 1076 error = doscheckpath(ip, dp);
6970b52a 1077 tcnp->cn_flags |= CNP_PDIRUNLOCK;
fad57d0e
MD
1078 if (error) {
1079 vrele(tdvp);
984263bc 1080 goto out;
fad57d0e
MD
1081 }
1082 /*
1083 * relookup no longer messes with the ref count. tdvp must
1084 * be unlocked on entry and on success will be locked on
1085 * return.
1086 */
984263bc 1087 error = relookup(tdvp, &tvp, tcnp);
fad57d0e
MD
1088 if (error) {
1089 if (tcnp->cn_flags & CNP_PDIRUNLOCK)
1090 vrele(tdvp);
1091 else
1092 vput(tdvp);
984263bc 1093 goto out;
fad57d0e
MD
1094 }
1095
1096 /*
1097 * tvp and tdvp are now locked again.
1098 */
984263bc
MD
1099 dp = VTODE(tdvp);
1100 xp = tvp ? VTODE(tvp) : NULL;
1101 }
1102
fad57d0e
MD
1103 /*
1104 * tvp and tdvp are now locked again, the 'bad' target can be used
1105 * to clean them up again. Delete an existant target and clean
1106 * up tvp. Set xp to NULL to indicate that tvp has been cleaned up.
1107 */
984263bc
MD
1108 if (xp != NULL) {
1109 /*
1110 * Target must be empty if a directory and have no links
1111 * to it. Also, ensure source and target are compatible
1112 * (both directories, or both not directories).
1113 */
1114 if (xp->de_Attributes & ATTR_DIRECTORY) {
1115 if (!dosdirempty(xp)) {
1116 error = ENOTEMPTY;
1117 goto bad;
1118 }
1119 if (!doingdirectory) {
1120 error = ENOTDIR;
1121 goto bad;
1122 }
984263bc
MD
1123 } else if (doingdirectory) {
1124 error = EISDIR;
1125 goto bad;
1126 }
1127 error = removede(dp, xp);
1128 if (error)
1129 goto bad;
1130 vput(tvp);
1131 xp = NULL;
fad57d0e 1132 tvp = NULL;
984263bc
MD
1133 }
1134
1135 /*
1136 * Convert the filename in tcnp into a dos filename. We copy this
1137 * into the denode and directory entry for the destination
1138 * file/directory.
1139 */
1140 error = uniqdosname(VTODE(tdvp), tcnp, toname);
1141 if (error)
fad57d0e 1142 goto bad;
984263bc
MD
1143
1144 /*
fad57d0e
MD
1145 * Since from wasn't locked at various places above, we have to do
1146 * a relookup here. If the target and source are the same directory
1147 * we have to unlock the target directory in order to safely relookup
1148 * the source, because relookup expects its directory to be unlocked.
1149 *
1150 * Note that ap->a_fvp is still valid and ref'd. Any cleanup must
1151 * now take that into account.
1152 *
1153 * The tdvp locking issues make this a real mess.
984263bc 1154 */
2b69e610 1155 fcnp->cn_flags &= ~CNP_MODMASK;
fad57d0e
MD
1156 fcnp->cn_flags |= CNP_LOCKPARENT;
1157 if (newparent == 0)
5fd012e0 1158 VOP_UNLOCK(tdvp, 0, td);
fad57d0e
MD
1159 error = relookup(fdvp, &fvp, fcnp);
1160 if (error || fvp == NULL) {
984263bc 1161 /*
fad57d0e
MD
1162 * From name has disappeared. Note: fdvp might == tdvp.
1163 *
1164 * DE_RENAME is only set if doingdirectory.
984263bc
MD
1165 */
1166 if (doingdirectory)
1167 panic("rename: lost dir entry");
fad57d0e
MD
1168 if (fcnp->cn_flags & CNP_PDIRUNLOCK)
1169 vrele(fdvp);
1170 else
1171 vput(fdvp);
1172 if (newparent == 0)
1173 vrele(tdvp);
1174 else
1175 vput(tdvp);
984263bc 1176 vrele(ap->a_fvp);
fad57d0e 1177 return(0);
984263bc 1178 }
fad57d0e
MD
1179
1180 /*
1181 * No error occured. tdvp, fdvp and fvp are all locked. If
1182 * newparent was 0 be aware that fdvp == tdvp. tvp has been cleaned
1183 * up. ap->a_fvp is still refd.
1184 */
984263bc
MD
1185 xp = VTODE(fvp);
1186 zp = VTODE(fdvp);
1187 from_diroffset = zp->de_fndoffset;
1188
1189 /*
1190 * Ensure that the directory entry still exists and has not
1191 * changed till now. If the source is a file the entry may
1192 * have been unlinked or renamed. In either case there is
1193 * no further work to be done. If the source is a directory
1194 * then it cannot have been rmdir'ed or renamed; this is
1195 * prohibited by the DE_RENAME flag.
fad57d0e
MD
1196 *
1197 * DE_RENAME is only set if doingdirectory.
984263bc
MD
1198 */
1199 if (xp != ip) {
1200 if (doingdirectory)
1201 panic("rename: lost dir entry");
fad57d0e 1202 goto done;
984263bc 1203 } else {
3446c007
MD
1204 u_long new_dirclust;
1205 u_long new_diroffset;
1206
984263bc
MD
1207 /*
1208 * First write a new entry in the destination
1209 * directory and mark the entry in the source directory
1210 * as deleted. Then move the denode to the correct hash
1211 * chain for its new location in the filesystem. And, if
1212 * we moved a directory, then update its .. entry to point
1213 * to the new parent directory.
1214 */
1215 bcopy(ip->de_Name, oldname, 11);
1216 bcopy(toname, ip->de_Name, 11); /* update denode */
1217 dp->de_fndoffset = to_diroffset;
1218 dp->de_fndcnt = to_count;
1219 error = createde(ip, dp, (struct denode **)0, tcnp);
1220 if (error) {
1221 bcopy(oldname, ip->de_Name, 11);
fad57d0e 1222 goto done;
984263bc
MD
1223 }
1224 ip->de_refcnt++;
1225 zp->de_fndoffset = from_diroffset;
1226 error = removede(zp, ip);
1227 if (error) {
1228 /* XXX should really panic here, fs is corrupt */
fad57d0e 1229 goto done;
984263bc
MD
1230 }
1231 if (!doingdirectory) {
1232 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0,
3446c007 1233 &new_dirclust, 0);
984263bc
MD
1234 if (error) {
1235 /* XXX should really panic here, fs is corrupt */
fad57d0e 1236 goto done;
984263bc 1237 }
3446c007
MD
1238 if (new_dirclust == MSDOSFSROOT)
1239 new_diroffset = to_diroffset;
984263bc 1240 else
3446c007
MD
1241 new_diroffset = to_diroffset & pmp->pm_crbomask;
1242 msdosfs_reinsert(ip, new_dirclust, new_diroffset);
984263bc 1243 }
984263bc
MD
1244 }
1245
1246 /*
1247 * If we moved a directory to a new parent directory, then we must
1248 * fixup the ".." entry in the moved directory.
1249 */
1250 if (doingdirectory && newparent) {
1251 cn = ip->de_StartCluster;
1252 if (cn == MSDOSFSROOT) {
1253 /* this should never happen */
1254 panic("msdosfs_rename(): updating .. in root directory?");
fad57d0e 1255 } else {
984263bc 1256 bn = cntobn(pmp, cn);
fad57d0e 1257 }
3b568787 1258 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, &bp);
984263bc
MD
1259 if (error) {
1260 /* XXX should really panic here, fs is corrupt */
1261 brelse(bp);
fad57d0e 1262 goto done;
984263bc
MD
1263 }
1264 dotdotp = (struct direntry *)bp->b_data + 1;
1265 putushort(dotdotp->deStartCluster, dp->de_StartCluster);
1266 if (FAT32(pmp))
1267 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16);
1268 error = bwrite(bp);
1269 if (error) {
1270 /* XXX should really panic here, fs is corrupt */
fad57d0e 1271 goto done;
984263bc
MD
1272 }
1273 }
1274
fad57d0e
MD
1275 /*
1276 * done case fvp, fdvp, tdvp are locked. ap->a_fvp is refd
1277 */
1278done:
1279 if (doingdirectory)
1280 ip->de_flag &= ~DE_RENAME; /* XXX fvp not locked */
1281 vput(fvp);
1282 if (newparent)
1283 vput(fdvp);
1284 else
1285 vrele(fdvp);
1286 vput(tdvp);
1287 vrele(ap->a_fvp);
1288 return (error);
1289
1290 /*
1291 * 'bad' target: xp governs tvp. tvp and tdvp arel ocked, fdvp and fvp
1292 * are not locked. ip points to fvp's inode which may have DE_RENAME
1293 * set.
1294 */
984263bc
MD
1295bad:
1296 if (xp)
1297 vput(tvp);
1298 vput(tdvp);
1299out:
fad57d0e
MD
1300 /*
1301 * 'out' target: tvp and tdvp have already been cleaned up.
1302 */
1303 if (doingdirectory)
1304 ip->de_flag &= ~DE_RENAME;
984263bc
MD
1305 vrele(fdvp);
1306 vrele(fvp);
1307 return (error);
1308
1309}
1310
1311static struct {
1312 struct direntry dot;
1313 struct direntry dotdot;
1314} dosdirtemplate = {
1315 { ". ", " ", /* the . entry */
1316 ATTR_DIRECTORY, /* file attribute */
1317 0, /* reserved */
1318 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1319 { 0, 0 }, /* access date */
1320 { 0, 0 }, /* high bits of start cluster */
1321 { 210, 4 }, { 210, 4 }, /* modify time & date */
1322 { 0, 0 }, /* startcluster */
1323 { 0, 0, 0, 0 } /* filesize */
1324 },
1325 { ".. ", " ", /* the .. entry */
1326 ATTR_DIRECTORY, /* file attribute */
1327 0, /* reserved */
1328 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1329 { 0, 0 }, /* access date */
1330 { 0, 0 }, /* high bits of start cluster */
1331 { 210, 4 }, { 210, 4 }, /* modify time & date */
1332 { 0, 0 }, /* startcluster */
1333 { 0, 0, 0, 0 } /* filesize */
1334 }
1335};
1336
4625f023
CP
1337/*
1338 * msdosfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
1339 * struct componentname *a_cnp, struct vattr *a_vap)
1340 */
984263bc 1341static int
e62afb5f 1342msdosfs_mkdir(struct vop_old_mkdir_args *ap)
984263bc
MD
1343{
1344 struct componentname *cnp = ap->a_cnp;
1345 struct denode *dep;
1346 struct denode *pdep = VTODE(ap->a_dvp);
1347 struct direntry *denp;
1348 struct msdosfsmount *pmp = pdep->de_pmp;
1349 struct buf *bp;
1350 u_long newcluster, pcl;
1351 int bn;
1352 int error;
1353 struct denode ndirent;
1354 struct timespec ts;
1355
1356 /*
1357 * If this is the root directory and there is no space left we
1358 * can't do anything. This is because the root directory can not
1359 * change size.
1360 */
1361 if (pdep->de_StartCluster == MSDOSFSROOT
1362 && pdep->de_fndoffset >= pdep->de_FileSize) {
1363 error = ENOSPC;
1364 goto bad2;
1365 }
1366
1367 /*
1368 * Allocate a cluster to hold the about to be created directory.
1369 */
1370 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL);
1371 if (error)
1372 goto bad2;
1373
1374 bzero(&ndirent, sizeof(ndirent));
1375 ndirent.de_pmp = pmp;
1376 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
1377 getnanotime(&ts);
1378 DETIMES(&ndirent, &ts, &ts, &ts);
1379
1380 /*
1381 * Now fill the cluster with the "." and ".." entries. And write
1382 * the cluster to disk. This way it is there for the parent
1383 * directory to be pointing at if there were a crash.
1384 */
1385 bn = cntobn(pmp, newcluster);
1386 /* always succeeds */
1387 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0);
1388 bzero(bp->b_data, pmp->pm_bpcluster);
1389 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate);
1390 denp = (struct direntry *)bp->b_data;
1391 putushort(denp[0].deStartCluster, newcluster);
1392 putushort(denp[0].deCDate, ndirent.de_CDate);
1393 putushort(denp[0].deCTime, ndirent.de_CTime);
1394 denp[0].deCHundredth = ndirent.de_CHun;
1395 putushort(denp[0].deADate, ndirent.de_ADate);
1396 putushort(denp[0].deMDate, ndirent.de_MDate);
1397 putushort(denp[0].deMTime, ndirent.de_MTime);
1398 pcl = pdep->de_StartCluster;
1399 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk)
1400 pcl = 0;
1401 putushort(denp[1].deStartCluster, pcl);
1402 putushort(denp[1].deCDate, ndirent.de_CDate);
1403 putushort(denp[1].deCTime, ndirent.de_CTime);
1404 denp[1].deCHundredth = ndirent.de_CHun;
1405 putushort(denp[1].deADate, ndirent.de_ADate);
1406 putushort(denp[1].deMDate, ndirent.de_MDate);
1407 putushort(denp[1].deMTime, ndirent.de_MTime);
1408 if (FAT32(pmp)) {
1409 putushort(denp[0].deHighClust, newcluster >> 16);
1410 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16);
1411 }
1412
1413 error = bwrite(bp);
1414 if (error)
1415 goto bad;
1416
1417 /*
1418 * Now build up a directory entry pointing to the newly allocated
1419 * cluster. This will be written to an empty slot in the parent
1420 * directory.
1421 */
984263bc
MD
1422 error = uniqdosname(pdep, cnp, ndirent.de_Name);
1423 if (error)
1424 goto bad;
1425
1426 ndirent.de_Attributes = ATTR_DIRECTORY;
1427 ndirent.de_LowerCase = 0;
1428 ndirent.de_StartCluster = newcluster;
1429 ndirent.de_FileSize = 0;
1430 ndirent.de_dev = pdep->de_dev;
1431 ndirent.de_devvp = pdep->de_devvp;
1432 error = createde(&ndirent, pdep, &dep, cnp);
1433 if (error)
1434 goto bad;
1435 *ap->a_vpp = DETOV(dep);
1436 return (0);
1437
1438bad:
1439 clusterfree(pmp, newcluster, NULL);
1440bad2:
1441 return (error);
1442}
1443
4625f023
CP
1444/*
1445 * msdosfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
1446 * struct componentname *a_cnp)
1447 */
984263bc 1448static int
e62afb5f 1449msdosfs_rmdir(struct vop_old_rmdir_args *ap)
984263bc 1450{
dadab5e9
MD
1451 struct vnode *vp = ap->a_vp;
1452 struct vnode *dvp = ap->a_dvp;
1453 struct componentname *cnp = ap->a_cnp;
1454 struct denode *ip, *dp;
1455 struct thread *td = cnp->cn_td;
984263bc
MD
1456 int error;
1457
1458 ip = VTODE(vp);
1459 dp = VTODE(dvp);
1460
1461 /*
1462 * Verify the directory is empty (and valid).
1463 * (Rmdir ".." won't be valid since
1464 * ".." will contain a reference to
1465 * the current directory and thus be
1466 * non-empty.)
1467 */
1468 error = 0;
1469 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) {
1470 error = ENOTEMPTY;
1471 goto out;
1472 }
1473 /*
1474 * Delete the entry from the directory. For dos filesystems this
1475 * gets rid of the directory entry on disk, the in memory copy
1476 * still exists but the de_refcnt is <= 0. This prevents it from
1477 * being found by deget(). When the vput() on dep is done we give
1478 * up access and eventually msdosfs_reclaim() will be called which
1479 * will remove it from the denode cache.
1480 */
1481 error = removede(dp, ip);
1482 if (error)
1483 goto out;
1484 /*
1485 * This is where we decrement the link count in the parent
1486 * directory. Since dos filesystems don't do this we just purge
1487 * the name cache.
1488 */
5fd012e0 1489 VOP_UNLOCK(dvp, 0, td);
984263bc
MD
1490 /*
1491 * Truncate the directory that is being deleted.
1492 */
3b568787 1493 error = detrunc(ip, (u_long)0, IO_SYNC, td);
984263bc 1494
5fd012e0 1495 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
984263bc
MD
1496out:
1497 return (error);
1498}
1499
1500/*
1501 * DOS filesystems don't know what symlinks are.
4625f023
CP
1502 *
1503 * msdosfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1504 * struct componentname *a_cnp, struct vattr *a_vap,
1505 * char *a_target)
984263bc
MD
1506 */
1507static int
e62afb5f 1508msdosfs_symlink(struct vop_old_symlink_args *ap)
984263bc
MD
1509{
1510 return (EOPNOTSUPP);
1511}
1512
4625f023
CP
1513/*
1514 * msdosfs_readdir(struct vnode *a_vp, struct uio *a_uio,
1515 * struct ucred *a_cred, int *a_eofflag, int *a_ncookies,
1516 * u_long **a_cookies)
1517 */
984263bc 1518static int
4625f023 1519msdosfs_readdir(struct vop_readdir_args *ap)
984263bc
MD
1520{
1521 int error = 0;
1522 int diff;
1523 long n;
1524 int blsize;
1525 long on;
1526 u_long cn;
984263bc
MD
1527 u_long dirsperblk;
1528 long bias = 0;
1529 daddr_t bn, lbn;
1530 struct buf *bp;
1531 struct denode *dep = VTODE(ap->a_vp);
1532 struct msdosfsmount *pmp = dep->de_pmp;
1533 struct direntry *dentp;
984263bc
MD
1534 struct uio *uio = ap->a_uio;
1535 u_long *cookies = NULL;
1536 int ncookies = 0;
1537 off_t offset, off;
1538 int chksum = -1;
1754e0da
JS
1539 ino_t d_ino;
1540 uint16_t d_namlen;
1541 uint8_t d_type;
1542 char *d_name_storage = NULL;
1543 char *d_name;
984263bc
MD
1544
1545#ifdef MSDOSFS_DEBUG
1546 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n",
1547 ap->a_vp, uio, ap->a_cred, ap->a_eofflag);
1548#endif
1549
1550 /*
1551 * msdosfs_readdir() won't operate properly on regular files since
1552 * it does i/o only with the the filesystem vnode, and hence can
1553 * retrieve the wrong block from the buffer cache for a plain file.
1554 * So, fail attempts to readdir() on a plain file.
1555 */
1556 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0)
1557 return (ENOTDIR);
1558
984263bc
MD
1559 /*
1560 * If the user buffer is smaller than the size of one dos directory
1561 * entry or the file offset is not a multiple of the size of a
1562 * directory entry, then we fail the read.
1563 */
1564 off = offset = uio->uio_offset;
1565 if (uio->uio_resid < sizeof(struct direntry) ||
1566 (offset & (sizeof(struct direntry) - 1)))
1567 return (EINVAL);
1568
1569 if (ap->a_ncookies) {
1570 ncookies = uio->uio_resid / 16;
1571 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP,
1572 M_WAITOK);
1573 *ap->a_cookies = cookies;
1574 *ap->a_ncookies = ncookies;
1575 }
1576
1577 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
1578
1579 /*
1580 * If they are reading from the root directory then, we simulate
1581 * the . and .. entries since these don't exist in the root
1582 * directory. We also set the offset bias to make up for having to
1583 * simulate these entries. By this I mean that at file offset 64 we
1584 * read the first entry in the root directory that lives on disk.
1585 */
1586 if (dep->de_StartCluster == MSDOSFSROOT
1587 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) {
1588#if 0
1589 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n",
1590 offset);
1591#endif
1592 bias = 2 * sizeof(struct direntry);
1593 if (offset < bias) {
1754e0da
JS
1594 for (n = (int)offset / sizeof(struct direntry); n < 2;
1595 n++) {
984263bc 1596 if (FAT32(pmp))
1754e0da
JS
1597 d_ino = cntobn(pmp, pmp->pm_rootdirblk)
1598 * dirsperblk;
984263bc 1599 else
1754e0da
JS
1600 d_ino = 1;
1601 d_type = DT_DIR;
1602 if (n == 0) {
1603 d_namlen = 1;
1604 d_name = ".";
1605 } else /* if (n == 1) */{
1606 d_namlen = 2;
1607 d_name = "..";
984263bc 1608 }
1754e0da
JS
1609 if (vop_write_dirent(&error, uio, d_ino, d_type,
1610 d_namlen, d_name))
984263bc 1611 goto out;
984263bc
MD
1612 if (error)
1613 goto out;
1614 offset += sizeof(struct direntry);
1615 off = offset;
1616 if (cookies) {
1617 *cookies++ = offset;
1618 if (--ncookies <= 0)
1619 goto out;
1620 }
1621 }
1622 }
1623 }
1624
1754e0da 1625 d_name_storage = malloc(WIN_MAXLEN, M_TEMP, M_WAITOK);
984263bc 1626 off = offset;
1754e0da 1627
984263bc
MD
1628 while (uio->uio_resid > 0) {
1629 lbn = de_cluster(pmp, offset - bias);
1630 on = (offset - bias) & pmp->pm_crbomask;
1631 n = min(pmp->pm_bpcluster - on, uio->uio_resid);
1632 diff = dep->de_FileSize - (offset - bias);
1633 if (diff <= 0)
1634 break;
1635 n = min(n, diff);
1636 error = pcbmap(dep, lbn, &bn, &cn, &blsize);
1637 if (error)
1638 break;
3b568787 1639 error = bread(pmp->pm_devvp, bn, blsize, &bp);
984263bc
MD
1640 if (error) {
1641 brelse(bp);
1754e0da 1642 free(d_name_storage, M_TEMP);
984263bc
MD
1643 return (error);
1644 }
1645 n = min(n, blsize - bp->b_resid);
1646
1647 /*
1648 * Convert from dos directory entries to fs-independent
1649 * directory entries.
1650 */
1651 for (dentp = (struct direntry *)(bp->b_data + on);
1652 (char *)dentp < bp->b_data + on + n;
1653 dentp++, offset += sizeof(struct direntry)) {
1654#if 0
1655 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n",
1656 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes);
1657#endif
1754e0da 1658 d_name = d_name_storage;
984263bc
MD
1659 /*
1660 * If this is an unused entry, we can stop.
1661 */
1662 if (dentp->deName[0] == SLOT_EMPTY) {
1663 brelse(bp);
1664 goto out;
1665 }
1666 /*
1667 * Skip deleted entries.
1668 */
1669 if (dentp->deName[0] == SLOT_DELETED) {
1670 chksum = -1;
1671 continue;
1672 }
1673
1674 /*
1675 * Handle Win95 long directory entries
1676 */
1677 if (dentp->deAttributes == ATTR_WIN95) {
1678 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME)
1679 continue;
1680 chksum = win2unixfn((struct winentry *)dentp,
1754e0da 1681 d_name, &d_namlen, chksum,
984263bc
MD
1682 pmp->pm_flags & MSDOSFSMNT_U2WTABLE,
1683 pmp->pm_u2w);
1684 continue;
1685 }
1686
1687 /*
1688 * Skip volume labels
1689 */
1690 if (dentp->deAttributes & ATTR_VOLUME) {
1691 chksum = -1;
1692 continue;
1693 }
1694 /*
1754e0da 1695 * This computation of d_ino must match
984263bc
MD
1696 * the computation of va_fileid in
1697 * msdosfs_getattr.
1698 */
1699 if (dentp->deAttributes & ATTR_DIRECTORY) {
1754e0da 1700 d_ino = getushort(dentp->deStartCluster);
984263bc 1701 if (FAT32(pmp))
1754e0da 1702 d_ino |= getushort(dentp->deHighClust) << 16;
984263bc 1703 /* if this is the root directory */
1754e0da
JS
1704 if (d_ino != MSDOSFSROOT)
1705 d_ino = cntobn(pmp, d_ino) * dirsperblk;
1706 else if (FAT32(pmp))
1707 d_ino = cntobn(pmp, pmp->pm_rootdirblk)
1708 * dirsperblk;
984263bc 1709 else
1754e0da
JS
1710 d_ino = 1;
1711 d_type = DT_DIR;
984263bc 1712 } else {
1754e0da
JS
1713 d_ino = offset / sizeof(struct direntry);
1714 d_type = DT_REG;
984263bc 1715 }
1754e0da
JS
1716 if (chksum != winChksum(dentp->deName)) {
1717 d_namlen = dos2unixfn(dentp->deName,
1718 (u_char *)d_name,
984263bc
MD
1719 dentp->deLowerCase |
1720 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ?
1721 (LCASE_BASE | LCASE_EXT) : 0),
1722 pmp->pm_flags & MSDOSFSMNT_U2WTABLE,
1723 pmp->pm_d2u,
1724 pmp->pm_flags & MSDOSFSMNT_ULTABLE,
1725 pmp->pm_ul);
1754e0da 1726 }
984263bc 1727 chksum = -1;
1754e0da
JS
1728 if (vop_write_dirent(&error, uio, d_ino, d_type,
1729 d_namlen, d_name)) {
984263bc
MD
1730 brelse(bp);
1731 goto out;
1732 }
984263bc
MD
1733 if (error) {
1734 brelse(bp);
1735 goto out;
1736 }
1754e0da 1737
984263bc
MD
1738 if (cookies) {
1739 *cookies++ = offset + sizeof(struct direntry);
1740 if (--ncookies <= 0) {
1741 brelse(bp);
1742 goto out;
1743 }
1744 }
1745 off = offset + sizeof(struct direntry);
1746 }
1747 brelse(bp);
1748 }
1749out:
1754e0da
JS
1750 if (d_name_storage != NULL)
1751 free(d_name_storage, M_TEMP);
1752
984263bc
MD
1753 /* Subtract unused cookies */
1754 if (ap->a_ncookies)
1755 *ap->a_ncookies -= ncookies;
1756
1757 uio->uio_offset = off;
1758
1759 /*
1760 * Set the eofflag (NFS uses it)
1761 */
1762 if (ap->a_eofflag) {
1763 if (dep->de_FileSize - (offset - bias) <= 0)
1764 *ap->a_eofflag = 1;
1765 else
1766 *ap->a_eofflag = 0;
1767 }
1768 return (error);
1769}
1770
1771/*
1772 * vp - address of vnode file the file
1773 * bn - which cluster we are interested in mapping to a filesystem block number.
1774 * vpp - returns the vnode for the block special file holding the filesystem
1775 * containing the file of interest
1776 * bnp - address of where to return the filesystem relative block number
4625f023
CP
1777 *
1778 * msdosfs_bmap(struct vnode *a_vp, daddr_t a_bn, struct vnode **a_vpp,
1779 * daddr_t *a_bnp, int *a_runp, int *a_runb)
984263bc
MD
1780 */
1781static int
4625f023 1782msdosfs_bmap(struct vop_bmap_args *ap)
984263bc
MD
1783{
1784 struct denode *dep = VTODE(ap->a_vp);
1785
1786 if (ap->a_vpp != NULL)
1787 *ap->a_vpp = dep->de_devvp;
1788 if (ap->a_bnp == NULL)
1789 return (0);
1790 if (ap->a_runp) {
1791 /*
1792 * Sequential clusters should be counted here.
1793 */
1794 *ap->a_runp = 0;
1795 }
1796 if (ap->a_runb) {
1797 *ap->a_runb = 0;
1798 }
1799 return (pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0));
1800}
1801
4625f023 1802/*
81b5c339 1803 * msdosfs_strategy(struct vnode *a_vp, struct bio *a_bio)
4625f023 1804 */
984263bc 1805static int
4625f023 1806msdosfs_strategy(struct vop_strategy_args *ap)
984263bc 1807{
81b5c339
MD
1808 struct bio *bio = ap->a_bio;
1809 struct bio *nbio;
1810 struct buf *bp = bio->bio_buf;
1811 struct vnode *vp = ap->a_vp;
1812 struct denode *dep = VTODE(vp);
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1813 int error = 0;
1814
81b5c339 1815 if (vp->v_type == VBLK || vp->v_type == VCHR)
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1816 panic("msdosfs_strategy: spec");
1817 /*
1818 * If we don't already know the filesystem relative block number
1819 * then get it using pcbmap(). If pcbmap() returns the block
1820 * number as -1 then we've got a hole in the file. DOS filesystems
1821 * don't allow files with holes, so we shouldn't ever see this.
1822 */
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MD
1823 nbio = push_bio(bio);
1824 if (nbio->bio_blkno == (daddr_t)-1) {
1825 error = pcbmap(dep, bio->bio_blkno, &nbio->bio_blkno, 0, 0);
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MD
1826 if (error) {
1827 bp->b_error = error;
1828 bp->b_flags |= B_ERROR;
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MD
1829 /* I/O was never started on nbio, must biodone(bio) */
1830 biodone(bio);
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1831 return (error);
1832 }
81b5c339 1833 if (nbio->bio_blkno == (daddr_t)-1)
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1834 vfs_bio_clrbuf(bp);
1835 }
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MD
1836 if (nbio->bio_blkno == (daddr_t)-1) {
1837 /* I/O was never started on nbio, must biodone(bio) */
1838 biodone(bio);
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1839 return (0);
1840 }
1841 /*
1842 * Read/write the block from/to the disk that contains the desired
1843 * file block.
1844 */
81b5c339 1845 vn_strategy(dep->de_devvp, nbio);
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1846 return (0);
1847}
1848
4625f023
CP
1849/*
1850 * msdosfs_print(struct vnode *vp)
1851 */
984263bc 1852static int
4625f023 1853msdosfs_print(struct vop_print_args *ap)
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MD
1854{
1855 struct denode *dep = VTODE(ap->a_vp);
1856
1857 printf(
1858 "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ",
1859 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset);
1860 printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev));
3446c007 1861 lockmgr_printinfo(&ap->a_vp->v_lock);
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1862 printf("\n");
1863 return (0);
1864}
1865
4625f023
CP
1866/*
1867 * msdosfs_pathconf(struct vnode *a_vp, int a_name, int *a_retval)
1868 */
984263bc 1869static int
4625f023 1870msdosfs_pathconf(struct vop_pathconf_args *ap)
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MD
1871{
1872 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp;
1873
1874 switch (ap->a_name) {
1875 case _PC_LINK_MAX:
1876 *ap->a_retval = 1;
1877 return (0);
1878 case _PC_NAME_MAX:
1879 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12;
1880 return (0);
1881 case _PC_PATH_MAX:
1882 *ap->a_retval = PATH_MAX;
1883 return (0);
1884 case _PC_CHOWN_RESTRICTED:
1885 *ap->a_retval = 1;
1886 return (0);
1887 case _PC_NO_TRUNC:
1888 *ap->a_retval = 0;
1889 return (0);
1890 default:
1891 return (EINVAL);
1892 }
1893 /* NOTREACHED */
1894}
1895
1896/*
1897 * get page routine
1898 *
1899 * XXX By default, wimp out... note that a_offset is ignored (and always
1900 * XXX has been).
1901 */
1902int
4625f023 1903msdosfs_getpages(struct vop_getpages_args *ap)
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1904{
1905 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
1906 ap->a_reqpage);
1907}
1908
1909/*
1910 * put page routine
1911 *
1912 * XXX By default, wimp out... note that a_offset is ignored (and always
1913 * XXX has been).
1914 */
1915int
4625f023 1916msdosfs_putpages(struct vop_putpages_args *ap)
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1917{
1918 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
1919 ap->a_sync, ap->a_rtvals);
1920}
1921
1922/* Global vfs data structures for msdosfs */
0961aa92 1923struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = {
2d3e977e 1924 { &vop_default_desc, vop_defaultop },
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JS
1925 { &vop_access_desc, (vnodeopv_entry_t) msdosfs_access },
1926 { &vop_bmap_desc, (vnodeopv_entry_t) msdosfs_bmap },
e62afb5f 1927 { &vop_old_lookup_desc, (vnodeopv_entry_t) msdosfs_lookup },
625ddaba 1928 { &vop_close_desc, (vnodeopv_entry_t) msdosfs_close },
e62afb5f 1929 { &vop_old_create_desc, (vnodeopv_entry_t) msdosfs_create },
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JS
1930 { &vop_fsync_desc, (vnodeopv_entry_t) msdosfs_fsync },
1931 { &vop_getattr_desc, (vnodeopv_entry_t) msdosfs_getattr },
1932 { &vop_inactive_desc, (vnodeopv_entry_t) msdosfs_inactive },
1933 { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked },
e62afb5f 1934 { &vop_old_link_desc, (vnodeopv_entry_t) msdosfs_link },
625ddaba 1935 { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock },
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MD
1936 { &vop_old_mkdir_desc, (vnodeopv_entry_t) msdosfs_mkdir },
1937 { &vop_old_mknod_desc, (vnodeopv_entry_t) msdosfs_mknod },
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JS
1938 { &vop_pathconf_desc, (vnodeopv_entry_t) msdosfs_pathconf },
1939 { &vop_print_desc, (vnodeopv_entry_t) msdosfs_print },
1940 { &vop_read_desc, (vnodeopv_entry_t) msdosfs_read },
1941 { &vop_readdir_desc, (vnodeopv_entry_t) msdosfs_readdir },
1942 { &vop_reclaim_desc, (vnodeopv_entry_t) msdosfs_reclaim },
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1943 { &vop_old_remove_desc, (vnodeopv_entry_t) msdosfs_remove },
1944 { &vop_old_rename_desc, (vnodeopv_entry_t) msdosfs_rename },
1945 { &vop_old_rmdir_desc, (vnodeopv_entry_t) msdosfs_rmdir },
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1946 { &vop_setattr_desc, (vnodeopv_entry_t) msdosfs_setattr },
1947 { &vop_strategy_desc, (vnodeopv_entry_t) msdosfs_strategy },
e62afb5f 1948 { &vop_old_symlink_desc, (vnodeopv_entry_t) msdosfs_symlink },
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1949 { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock },
1950 { &vop_write_desc, (vnodeopv_entry_t) msdosfs_write },
1951 { &vop_getpages_desc, (vnodeopv_entry_t) msdosfs_getpages },
1952 { &vop_putpages_desc, (vnodeopv_entry_t) msdosfs_putpages },
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MD
1953 { NULL, NULL }
1954};