kernel - Adjust UFS and HAMMER to use uiomovebp()
[dragonfly.git] / sys / vfs / msdosfs / msdosfs_vnops.c
CommitLineData
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1/* $FreeBSD: src/sys/msdosfs/msdosfs_vnops.c,v 1.95.2.4 2003/06/13 15:05:47 trhodes Exp $ */
2/* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg Exp $ */
3
4/*-
5 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
6 * Copyright (C) 1994, 1995, 1997 TooLs GmbH.
7 * All rights reserved.
8 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by TooLs GmbH.
21 * 4. The name of TooLs GmbH may not be used to endorse or promote products
22 * derived from this software without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
29 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
30 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35/*
36 * Written by Paul Popelka (paulp@uts.amdahl.com)
37 *
38 * You can do anything you want with this software, just don't say you wrote
39 * it, and don't remove this notice.
40 *
41 * This software is provided "as is".
42 *
43 * The author supplies this software to be publicly redistributed on the
44 * understanding that the author is not responsible for the correct
45 * functioning of this software in any circumstances and is not liable for
46 * any damages caused by this software.
47 *
48 * October 1992
49 */
50
51#include <sys/param.h>
52#include <sys/systm.h>
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53#include <sys/resourcevar.h> /* defines plimit structure in proc struct */
54#include <sys/kernel.h>
55#include <sys/stat.h>
56#include <sys/buf.h>
57#include <sys/proc.h>
895c1f85 58#include <sys/priv.h>
dadab5e9 59#include <sys/namei.h>
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60#include <sys/mount.h>
61#include <sys/unistd.h>
62#include <sys/vnode.h>
63#include <sys/malloc.h>
64#include <sys/dirent.h>
65#include <sys/signalvar.h>
66
67#include <vm/vm.h>
68#include <vm/vm_extern.h>
69#include <vm/vm_zone.h>
70#include <vm/vnode_pager.h>
71
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72#include <sys/buf2.h>
73
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74#include <machine/inttypes.h>
75
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76#include "bpb.h"
77#include "direntry.h"
78#include "denode.h"
79#include "msdosfsmount.h"
80#include "fat.h"
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81
82#define DOS_FILESIZE_MAX 0xffffffff
83
84/*
85 * Prototypes for MSDOSFS vnode operations
86 */
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87static int msdosfs_create (struct vop_old_create_args *);
88static int msdosfs_mknod (struct vop_old_mknod_args *);
7540ab49 89static int msdosfs_open (struct vop_open_args *);
a6ee311a
RG
90static int msdosfs_close (struct vop_close_args *);
91static int msdosfs_access (struct vop_access_args *);
92static int msdosfs_getattr (struct vop_getattr_args *);
93static int msdosfs_setattr (struct vop_setattr_args *);
94static int msdosfs_read (struct vop_read_args *);
95static int msdosfs_write (struct vop_write_args *);
96static int msdosfs_fsync (struct vop_fsync_args *);
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97static int msdosfs_remove (struct vop_old_remove_args *);
98static int msdosfs_link (struct vop_old_link_args *);
99static int msdosfs_rename (struct vop_old_rename_args *);
100static int msdosfs_mkdir (struct vop_old_mkdir_args *);
101static int msdosfs_rmdir (struct vop_old_rmdir_args *);
102static int msdosfs_symlink (struct vop_old_symlink_args *);
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103static int msdosfs_readdir (struct vop_readdir_args *);
104static int msdosfs_bmap (struct vop_bmap_args *);
105static int msdosfs_strategy (struct vop_strategy_args *);
106static int msdosfs_print (struct vop_print_args *);
107static int msdosfs_pathconf (struct vop_pathconf_args *ap);
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108
109/*
110 * Some general notes:
111 *
112 * In the ufs filesystem the inodes, superblocks, and indirect blocks are
113 * read/written using the vnode for the filesystem. Blocks that represent
114 * the contents of a file are read/written using the vnode for the file
115 * (including directories when they are read/written as files). This
116 * presents problems for the dos filesystem because data that should be in
117 * an inode (if dos had them) resides in the directory itself. Since we
118 * must update directory entries without the benefit of having the vnode
119 * for the directory we must use the vnode for the filesystem. This means
120 * that when a directory is actually read/written (via read, write, or
121 * readdir, or seek) we must use the vnode for the filesystem instead of
122 * the vnode for the directory as would happen in ufs. This is to insure we
123 * retreive the correct block from the buffer cache since the hash value is
124 * based upon the vnode address and the desired block number.
125 */
126
127/*
128 * Create a regular file. On entry the directory to contain the file being
fad57d0e 129 * created is locked. We must release before we return.
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130 *
131 * msdosfs_create(struct vnode *a_dvp, struct vnode **a_vpp,
132 * struct componentname *a_cnp, struct vattr *a_vap)
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133 */
134static int
e62afb5f 135msdosfs_create(struct vop_old_create_args *ap)
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136{
137 struct componentname *cnp = ap->a_cnp;
138 struct denode ndirent;
139 struct denode *dep;
140 struct denode *pdep = VTODE(ap->a_dvp);
141 struct timespec ts;
142 int error;
143
144#ifdef MSDOSFS_DEBUG
086c1d7e 145 kprintf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap);
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146#endif
147
148 /*
149 * If this is the root directory and there is no space left we
150 * can't do anything. This is because the root directory can not
151 * change size.
152 */
153 if (pdep->de_StartCluster == MSDOSFSROOT
154 && pdep->de_fndoffset >= pdep->de_FileSize) {
155 error = ENOSPC;
156 goto bad;
157 }
158
159 /*
160 * Create a directory entry for the file, then call createde() to
161 * have it installed. NOTE: DOS files are always executable. We
162 * use the absence of the owner write bit to make the file
163 * readonly.
164 */
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MD
165 bzero(&ndirent, sizeof(ndirent));
166 error = uniqdosname(pdep, cnp, ndirent.de_Name);
167 if (error)
168 goto bad;
169
170 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ?
171 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY;
172 ndirent.de_LowerCase = 0;
173 ndirent.de_StartCluster = 0;
174 ndirent.de_FileSize = 0;
175 ndirent.de_dev = pdep->de_dev;
176 ndirent.de_devvp = pdep->de_devvp;
177 ndirent.de_pmp = pdep->de_pmp;
178 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
179 getnanotime(&ts);
180 DETIMES(&ndirent, &ts, &ts, &ts);
181 error = createde(&ndirent, pdep, &dep, cnp);
182 if (error)
183 goto bad;
184 *ap->a_vpp = DETOV(dep);
185 return (0);
186
187bad:
188 return (error);
189}
190
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CP
191/*
192 * msdosfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp,
193 * struct componentname *a_cnp, struct vattr *a_vap)
194 */
984263bc 195static int
e62afb5f 196msdosfs_mknod(struct vop_old_mknod_args *ap)
984263bc 197{
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198 switch (ap->a_vap->va_type) {
199 case VDIR:
e62afb5f 200 return (msdosfs_mkdir((struct vop_old_mkdir_args *)ap));
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201 break;
202
203 case VREG:
e62afb5f 204 return (msdosfs_create((struct vop_old_create_args *)ap));
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205 break;
206
207 default:
208 return (EINVAL);
209 }
210 /* NOTREACHED */
211}
212
4625f023 213/*
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214 * msdosfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
215 * struct file *a_fp)
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216 */
217static int
218msdosfs_open(struct vop_open_args *ap)
219{
8ddc6004 220 return(vop_stdopen(ap));
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221}
222
223/*
b478fdce 224 * msdosfs_close(struct vnode *a_vp, int a_fflag)
4625f023 225 */
984263bc 226static int
4625f023 227msdosfs_close(struct vop_close_args *ap)
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228{
229 struct vnode *vp = ap->a_vp;
230 struct denode *dep = VTODE(vp);
231 struct timespec ts;
232
3c37c940 233 if (vp->v_sysref.refcnt > 1) {
984263bc 234 getnanotime(&ts);
3c37c940 235 DETIMES(dep, &ts, &ts, &ts);
984263bc 236 }
8ddc6004 237 return (vop_stdclose(ap));
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238}
239
4625f023 240/*
b478fdce 241 * msdosfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred)
4625f023 242 */
984263bc 243static int
4625f023 244msdosfs_access(struct vop_access_args *ap)
984263bc 245{
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246 struct denode *dep = VTODE(ap->a_vp);
247 struct msdosfsmount *pmp = dep->de_pmp;
38439a71 248 mode_t file_mode;
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249
250 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) |
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251 ((dep->de_Attributes & ATTR_READONLY) ?
252 0 : (S_IWUSR|S_IWGRP|S_IWOTH));
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253 file_mode &= pmp->pm_mask;
254
38439a71 255 return (vop_helper_access(ap, pmp->pm_uid, pmp->pm_gid, file_mode, 0));
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256}
257
4625f023 258/*
b478fdce 259 * msdosfs_getattr(struct vnode *a_vp, struct vattr *a_vap)
4625f023 260 */
984263bc 261static int
4625f023 262msdosfs_getattr(struct vop_getattr_args *ap)
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263{
264 struct denode *dep = VTODE(ap->a_vp);
265 struct msdosfsmount *pmp = dep->de_pmp;
266 struct vattr *vap = ap->a_vap;
267 mode_t mode;
268 struct timespec ts;
269 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
270 u_long fileid;
271
272 getnanotime(&ts);
273 DETIMES(dep, &ts, &ts, &ts);
274 vap->va_fsid = dev2udev(dep->de_dev);
275 /*
276 * The following computation of the fileid must be the same as that
277 * used in msdosfs_readdir() to compute d_fileno. If not, pwd
278 * doesn't work.
279 */
280 if (dep->de_Attributes & ATTR_DIRECTORY) {
4afd80f1 281 fileid = xcntobn(pmp, dep->de_StartCluster) * dirsperblk;
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MD
282 if (dep->de_StartCluster == MSDOSFSROOT)
283 fileid = 1;
284 } else {
4afd80f1 285 fileid = xcntobn(pmp, dep->de_dirclust) * dirsperblk;
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MD
286 if (dep->de_dirclust == MSDOSFSROOT)
287 fileid = roottobn(pmp, 0) * dirsperblk;
288 fileid += dep->de_diroffset / sizeof(struct direntry);
289 }
290 vap->va_fileid = fileid;
291 if ((dep->de_Attributes & ATTR_READONLY) == 0)
292 mode = S_IRWXU|S_IRWXG|S_IRWXO;
293 else
294 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
295 vap->va_mode = mode & pmp->pm_mask;
296 vap->va_uid = pmp->pm_uid;
297 vap->va_gid = pmp->pm_gid;
298 vap->va_nlink = 1;
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MD
299 vap->va_rmajor = VNOVAL;
300 vap->va_rminor = VNOVAL;
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301 vap->va_size = dep->de_FileSize;
302 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime);
303 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) {
304 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime);
305 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime);
306 } else {
307 vap->va_atime = vap->va_mtime;
308 vap->va_ctime = vap->va_mtime;
309 }
310 vap->va_flags = 0;
311 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0)
312 vap->va_flags |= SF_ARCHIVED;
313 vap->va_gen = 0;
314 vap->va_blocksize = pmp->pm_bpcluster;
315 vap->va_bytes =
316 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask;
317 vap->va_type = ap->a_vp->v_type;
318 vap->va_filerev = dep->de_modrev;
319 return (0);
320}
321
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CP
322/*
323 * msdosfs_setattr(struct vnode *a_vp, struct vattr *a_vap,
b478fdce 324 * struct ucred *a_cred)
4625f023 325 */
984263bc 326static int
4625f023 327msdosfs_setattr(struct vop_setattr_args *ap)
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MD
328{
329 struct vnode *vp = ap->a_vp;
330 struct denode *dep = VTODE(ap->a_vp);
331 struct msdosfsmount *pmp = dep->de_pmp;
332 struct vattr *vap = ap->a_vap;
333 struct ucred *cred = ap->a_cred;
334 int error = 0;
335
336#ifdef MSDOSFS_DEBUG
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337 kprintf("msdosfs_setattr(): vp %p, vap %p, cred %p\n",
338 ap->a_vp, vap, cred);
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MD
339#endif
340
341 /*
342 * Check for unsettable attributes.
343 */
344 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
345 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
0e9b9130 346 (vap->va_blocksize != VNOVAL) || (vap->va_rmajor != VNOVAL) ||
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347 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
348#ifdef MSDOSFS_DEBUG
086c1d7e 349 kprintf("msdosfs_setattr(): returning EINVAL\n");
664f5072 350 kprintf(" va_type %u, va_nlink %"PRIx64", va_fsid %x, va_fileid %"PRIx64"\n",
984263bc 351 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid);
664f5072 352 kprintf(" va_blocksize %lx, va_rmajor %x, va_bytes %"PRIx64", va_gen %"PRIx64"\n",
0e9b9130 353 vap->va_blocksize, vap->va_rmajor, vap->va_bytes, vap->va_gen);
086c1d7e 354 kprintf(" va_uid %x, va_gid %x\n",
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MD
355 vap->va_uid, vap->va_gid);
356#endif
357 return (EINVAL);
358 }
359 if (vap->va_flags != VNOVAL) {
360 if (vp->v_mount->mnt_flag & MNT_RDONLY)
361 return (EROFS);
362 if (cred->cr_uid != pmp->pm_uid &&
db813a0c 363 (error = priv_check_cred(cred, PRIV_VFS_SETATTR, 0)))
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MD
364 return (error);
365 /*
366 * We are very inconsistent about handling unsupported
367 * attributes. We ignored the access time and the
368 * read and execute bits. We were strict for the other
369 * attributes.
370 *
371 * Here we are strict, stricter than ufs in not allowing
372 * users to attempt to set SF_SETTABLE bits or anyone to
373 * set unsupported bits. However, we ignore attempts to
374 * set ATTR_ARCHIVE for directories `cp -pr' from a more
375 * sensible file system attempts it a lot.
376 */
377 if (cred->cr_uid != 0) {
378 if (vap->va_flags & SF_SETTABLE)
379 return EPERM;
380 }
381 if (vap->va_flags & ~SF_ARCHIVED)
382 return EOPNOTSUPP;
383 if (vap->va_flags & SF_ARCHIVED)
384 dep->de_Attributes &= ~ATTR_ARCHIVE;
385 else if (!(dep->de_Attributes & ATTR_DIRECTORY))
386 dep->de_Attributes |= ATTR_ARCHIVE;
387 dep->de_flag |= DE_MODIFIED;
388 }
389
390 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
391 uid_t uid;
392 gid_t gid;
393
394 if (vp->v_mount->mnt_flag & MNT_RDONLY)
395 return (EROFS);
396 uid = vap->va_uid;
397 if (uid == (uid_t)VNOVAL)
398 uid = pmp->pm_uid;
399 gid = vap->va_gid;
400 if (gid == (gid_t)VNOVAL)
401 gid = pmp->pm_gid;
402 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid ||
403 (gid != pmp->pm_gid && !groupmember(gid, cred))) &&
db813a0c 404 (error = priv_check_cred(cred, PRIV_VFS_SETATTR, 0)))
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MD
405 return error;
406 if (uid != pmp->pm_uid || gid != pmp->pm_gid)
407 return EINVAL;
408 }
409
410 if (vap->va_size != VNOVAL) {
411 /*
412 * Disallow write attempts on read-only file systems;
413 * unless the file is a socket, fifo, or a block or
414 * character device resident on the file system.
415 */
416 switch (vp->v_type) {
417 case VDIR:
418 return (EISDIR);
419 /* NOT REACHED */
420 case VLNK:
421 case VREG:
422 if (vp->v_mount->mnt_flag & MNT_RDONLY)
423 return (EROFS);
424 break;
425 default:
426 break;
427 }
87de5057 428 error = detrunc(dep, vap->va_size, 0);
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MD
429 if (error)
430 return error;
431 }
432 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
433 if (vp->v_mount->mnt_flag & MNT_RDONLY)
434 return (EROFS);
435 if (cred->cr_uid != pmp->pm_uid &&
db813a0c 436 (error = priv_check_cred(cred, PRIV_VFS_SETATTR, 0)) &&
984263bc 437 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
cb66845a 438 (error = VOP_EACCESS(ap->a_vp, VWRITE, cred))))
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MD
439 return (error);
440 if (vp->v_type != VDIR) {
441 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 &&
442 vap->va_atime.tv_sec != VNOVAL) {
443 dep->de_flag &= ~DE_ACCESS;
444 unix2dostime(&vap->va_atime, &dep->de_ADate,
445 NULL, NULL);
446 }
447 if (vap->va_mtime.tv_sec != VNOVAL) {
448 dep->de_flag &= ~DE_UPDATE;
449 unix2dostime(&vap->va_mtime, &dep->de_MDate,
450 &dep->de_MTime, NULL);
451 }
452 dep->de_Attributes |= ATTR_ARCHIVE;
453 dep->de_flag |= DE_MODIFIED;
454 }
455 }
456 /*
457 * DOS files only have the ability to have their writability
458 * attribute set, so we use the owner write bit to set the readonly
459 * attribute.
460 */
461 if (vap->va_mode != (mode_t)VNOVAL) {
462 if (vp->v_mount->mnt_flag & MNT_RDONLY)
463 return (EROFS);
464 if (cred->cr_uid != pmp->pm_uid &&
db813a0c 465 (error = priv_check_cred(cred, PRIV_VFS_SETATTR, 0)))
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MD
466 return (error);
467 if (vp->v_type != VDIR) {
468 /* We ignore the read and execute bits. */
469 if (vap->va_mode & VWRITE)
470 dep->de_Attributes &= ~ATTR_READONLY;
471 else
472 dep->de_Attributes |= ATTR_READONLY;
473 dep->de_Attributes |= ATTR_ARCHIVE;
474 dep->de_flag |= DE_MODIFIED;
475 }
476 }
477 return (deupdat(dep, 1));
478}
479
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CP
480/*
481 * msdosfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
482 * struct ucred *a_cred)
483 */
984263bc 484static int
4625f023 485msdosfs_read(struct vop_read_args *ap)
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MD
486{
487 int error = 0;
488 int blsize;
489 int isadir;
e54488bb 490 size_t orig_resid;
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MD
491 u_int n;
492 u_long diff;
493 u_long on;
494 daddr_t lbn;
495 daddr_t rablock;
54078292
MD
496 off_t raoffset;
497 off_t loffset;
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498 int rasize;
499 int seqcount;
500 struct buf *bp;
501 struct vnode *vp = ap->a_vp;
502 struct denode *dep = VTODE(vp);
503 struct msdosfsmount *pmp = dep->de_pmp;
504 struct uio *uio = ap->a_uio;
505
506 if (uio->uio_offset < 0)
507 return (EINVAL);
508
509 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX)
510 return (0);
511 /*
512 * If they didn't ask for any data, then we are done.
513 */
514 orig_resid = uio->uio_resid;
e54488bb 515 if (orig_resid == 0)
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MD
516 return (0);
517
518 seqcount = ap->a_ioflag >> IO_SEQSHIFT;
519
520 isadir = dep->de_Attributes & ATTR_DIRECTORY;
521 do {
522 if (uio->uio_offset >= dep->de_FileSize)
523 break;
4afd80f1
MD
524
525 /*
526 * note: lbn is a cluster number, not a device block number.
527 */
528 lbn = de_off2cn(pmp, uio->uio_offset);
529 loffset = de_cn2doff(pmp, lbn);
530
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MD
531 /*
532 * If we are operating on a directory file then be sure to
533 * do i/o with the vnode for the filesystem instead of the
534 * vnode for the directory.
535 */
536 if (isadir) {
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MD
537 /*
538 * convert cluster # to block #. lbn is a
539 * device block number after this.
540 */
541 error = pcbmap(dep, lbn, &lbn, NULL, &blsize);
542 loffset = de_bntodoff(pmp, lbn);
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MD
543 if (error == E2BIG) {
544 error = EINVAL;
545 break;
546 } else if (error)
547 break;
54078292 548 error = bread(pmp->pm_devvp, loffset, blsize, &bp);
984263bc
MD
549 } else {
550 blsize = pmp->pm_bpcluster;
551 rablock = lbn + 1;
4afd80f1 552 raoffset = de_cn2doff(pmp, rablock);
984263bc 553 if (seqcount > 1 &&
54078292 554 raoffset < dep->de_FileSize) {
984263bc 555 rasize = pmp->pm_bpcluster;
54078292
MD
556 error = breadn(vp, loffset, blsize,
557 &raoffset, &rasize, 1, &bp);
984263bc 558 } else {
54078292 559 error = bread(vp, loffset, blsize, &bp);
984263bc
MD
560 }
561 }
562 if (error) {
563 brelse(bp);
564 break;
565 }
566 on = uio->uio_offset & pmp->pm_crbomask;
567 diff = pmp->pm_bpcluster - on;
e54488bb 568 n = szmin(uio->uio_resid, diff);
984263bc
MD
569 diff = dep->de_FileSize - uio->uio_offset;
570 if (diff < n)
571 n = diff;
572 diff = blsize - bp->b_resid;
573 if (diff < n)
574 n = diff;
44480e31 575 error = uiomovebp(bp, bp->b_data + on, (size_t)n, uio);
984263bc
MD
576 brelse(bp);
577 } while (error == 0 && uio->uio_resid > 0 && n != 0);
578 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) &&
579 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0)
580 dep->de_flag |= DE_ACCESS;
581 return (error);
582}
583
584/*
585 * Write data to a file or directory.
4625f023
CP
586 *
587 * msdosfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
588 * struct ucred *a_cred)
984263bc
MD
589 */
590static int
4625f023 591msdosfs_write(struct vop_write_args *ap)
984263bc
MD
592{
593 int n;
594 int croffset;
e54488bb 595 size_t resid;
984263bc
MD
596 u_long osize;
597 int error = 0;
598 u_long count;
4afd80f1 599 daddr_t cn, lastcn;
984263bc
MD
600 struct buf *bp;
601 int ioflag = ap->a_ioflag;
602 struct uio *uio = ap->a_uio;
dadab5e9 603 struct thread *td = uio->uio_td;
984263bc
MD
604 struct vnode *vp = ap->a_vp;
605 struct vnode *thisvp;
606 struct denode *dep = VTODE(vp);
607 struct msdosfsmount *pmp = dep->de_pmp;
049d6e6d 608 struct proc *p = (td ? td->td_proc : NULL);
7278a846 609 struct lwp *lp = (td ? td->td_lwp : NULL);
984263bc
MD
610
611#ifdef MSDOSFS_DEBUG
086c1d7e 612 kprintf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n",
0e63c0c7 613 vp, uio, ioflag, ap->a_cred);
086c1d7e 614 kprintf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n",
984263bc
MD
615 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster);
616#endif
617
618 switch (vp->v_type) {
619 case VREG:
620 if (ioflag & IO_APPEND)
621 uio->uio_offset = dep->de_FileSize;
622 thisvp = vp;
623 break;
624 case VDIR:
625 return EISDIR;
626 default:
627 panic("msdosfs_write(): bad file type");
628 }
629
630 if (uio->uio_offset < 0)
631 return (EFBIG);
632
633 if (uio->uio_resid == 0)
634 return (0);
635
636 /*
637 * If they've exceeded their filesize limit, tell them about it.
638 */
639 if (p &&
640 ((uoff_t)uio->uio_offset + uio->uio_resid >
641 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) {
7278a846 642 lwpsignal(p, lp, SIGXFSZ);
984263bc
MD
643 return (EFBIG);
644 }
645
e54488bb
MD
646 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX)
647 return (EFBIG);
984263bc
MD
648 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX)
649 return (EFBIG);
650
651 /*
652 * If the offset we are starting the write at is beyond the end of
653 * the file, then they've done a seek. Unix filesystems allow
654 * files with holes in them, DOS doesn't so we must fill the hole
655 * with zeroed blocks.
656 */
657 if (uio->uio_offset > dep->de_FileSize) {
3b568787 658 error = deextend(dep, uio->uio_offset);
984263bc
MD
659 if (error)
660 return (error);
661 }
662
663 /*
664 * Remember some values in case the write fails.
665 */
666 resid = uio->uio_resid;
667 osize = dep->de_FileSize;
668
669 /*
670 * If we write beyond the end of the file, extend it to its ultimate
671 * size ahead of the time to hopefully get a contiguous area.
672 */
673 if (uio->uio_offset + resid > osize) {
674 count = de_clcount(pmp, uio->uio_offset + resid) -
675 de_clcount(pmp, osize);
676 error = extendfile(dep, count, NULL, NULL, 0);
677 if (error && (error != ENOSPC || (ioflag & IO_UNIT)))
678 goto errexit;
679 lastcn = dep->de_fc[FC_LASTFC].fc_frcn;
680 } else
681 lastcn = de_clcount(pmp, osize) - 1;
682
683 do {
4afd80f1 684 if (de_off2cn(pmp, uio->uio_offset) > lastcn) {
984263bc
MD
685 error = ENOSPC;
686 break;
687 }
688
689 croffset = uio->uio_offset & pmp->pm_crbomask;
e54488bb 690 n = (int)szmin(uio->uio_resid, pmp->pm_bpcluster - croffset);
984263bc
MD
691 if (uio->uio_offset + n > dep->de_FileSize) {
692 dep->de_FileSize = uio->uio_offset + n;
693 /* The object size needs to be set before buffer is allocated */
694 vnode_pager_setsize(vp, dep->de_FileSize);
695 }
696
8aa7625b
MD
697 /*
698 * If either the whole cluster gets written, or we write
699 * the cluster from its start beyond EOF, then no need to
700 * read data from disk.
701 *
702 * If UIO_NOCOPY is set we have to do a read-before-write
703 * to fill in any missing pieces of the buffer since no
704 * actual overwrite will occur.
705 */
4afd80f1 706 cn = de_off2cn(pmp, uio->uio_offset);
984263bc 707 if ((uio->uio_offset & pmp->pm_crbomask) == 0
8aa7625b 708 && uio->uio_segflg != UIO_NOCOPY
4afd80f1
MD
709 && (de_off2cn(pmp, uio->uio_offset + uio->uio_resid)
710 > de_off2cn(pmp, uio->uio_offset)
984263bc 711 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) {
4afd80f1 712 bp = getblk(thisvp, de_cn2doff(pmp, cn),
54078292 713 pmp->pm_bpcluster, 0, 0);
984263bc
MD
714 clrbuf(bp);
715 /*
716 * Do the bmap now, since pcbmap needs buffers
717 * for the fat table. (see msdosfs_strategy)
718 */
54078292 719 if (bp->b_bio2.bio_offset == NOOFFSET) {
4afd80f1 720 daddr_t lblkno = de_off2cn(pmp, bp->b_loffset);
54078292
MD
721 daddr_t dblkno;
722
4afd80f1
MD
723 error = pcbmap(dep, lblkno,
724 &dblkno, NULL, NULL);
54078292
MD
725 if (error || dblkno == (daddr_t)-1) {
726 bp->b_bio2.bio_offset = NOOFFSET;
727 } else {
4afd80f1 728 bp->b_bio2.bio_offset = de_bntodoff(pmp, dblkno);
54078292 729 }
984263bc 730 }
54078292 731 if (bp->b_bio2.bio_offset == NOOFFSET) {
984263bc
MD
732 brelse(bp);
733 if (!error)
734 error = EIO; /* XXX */
735 break;
736 }
737 } else {
738 /*
4afd80f1
MD
739 * The block we need to write into exists, so read
740 * it in.
984263bc 741 */
4afd80f1
MD
742 error = bread(thisvp, de_cn2doff(pmp, cn),
743 pmp->pm_bpcluster, &bp);
984263bc
MD
744 if (error) {
745 brelse(bp);
746 break;
747 }
748 }
749
750 /*
751 * Should these vnode_pager_* functions be done on dir
752 * files?
753 */
754
755 /*
756 * Copy the data from user space into the buf header.
757 */
44480e31 758 error = uiomovebp(bp, bp->b_data + croffset, (size_t)n, uio);
984263bc
MD
759 if (error) {
760 brelse(bp);
761 break;
762 }
763
764 /*
765 * If they want this synchronous then write it and wait for
766 * it. Otherwise, if on a cluster boundary write it
767 * asynchronously so we can move on to the next block
768 * without delay. Otherwise do a delayed write because we
769 * may want to write somemore into the block later.
770 */
771 if (ioflag & IO_SYNC)
b1ce5639 772 bwrite(bp);
984263bc
MD
773 else if (n + croffset == pmp->pm_bpcluster)
774 bawrite(bp);
775 else
776 bdwrite(bp);
777 dep->de_flag |= DE_UPDATE;
778 } while (error == 0 && uio->uio_resid > 0);
779
780 /*
781 * If the write failed and they want us to, truncate the file back
782 * to the size it was before the write was attempted.
783 */
784errexit:
785 if (error) {
786 if (ioflag & IO_UNIT) {
87de5057 787 detrunc(dep, osize, ioflag & IO_SYNC);
984263bc
MD
788 uio->uio_offset -= resid - uio->uio_resid;
789 uio->uio_resid = resid;
790 } else {
87de5057 791 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC);
984263bc
MD
792 if (uio->uio_resid != resid)
793 error = 0;
794 }
795 } else if (ioflag & IO_SYNC)
796 error = deupdat(dep, 1);
797 return (error);
798}
799
800/*
801 * Flush the blocks of a file to disk.
802 *
803 * This function is worthless for vnodes that represent directories. Maybe we
804 * could just do a sync if they try an fsync on a directory file.
4625f023 805 *
b478fdce 806 * msdosfs_fsync(struct vnode *a_vp, int a_waitfor)
984263bc
MD
807 */
808static int
4625f023 809msdosfs_fsync(struct vop_fsync_args *ap)
984263bc
MD
810{
811 struct vnode *vp = ap->a_vp;
984263bc
MD
812
813 /*
814 * Flush all dirty buffers associated with a vnode.
815 */
6bae6177 816#ifdef DIAGNOSTIC
984263bc 817loop:
6bae6177 818#endif
4e0ecc94 819 vfsync(vp, ap->a_waitfor, 0, NULL, NULL);
984263bc 820#ifdef DIAGNOSTIC
6bae6177 821 if (ap->a_waitfor == MNT_WAIT && !RB_EMPTY(&vp->v_rbdirty_tree)) {
984263bc
MD
822 vprint("msdosfs_fsync: dirty", vp);
823 goto loop;
824 }
825#endif
984263bc
MD
826 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT));
827}
828
4625f023
CP
829/*
830 * msdosfs_remove(struct vnode *a_dvp, struct vnode *a_vp,
831 * struct componentname *a_cnp)
832 */
984263bc 833static int
e62afb5f 834msdosfs_remove(struct vop_old_remove_args *ap)
984263bc
MD
835{
836 struct denode *dep = VTODE(ap->a_vp);
837 struct denode *ddep = VTODE(ap->a_dvp);
838 int error;
839
840 if (ap->a_vp->v_type == VDIR)
841 error = EPERM;
842 else
843 error = removede(ddep, dep);
844#ifdef MSDOSFS_DEBUG
3c37c940
MD
845 kprintf("msdosfs_remove(), dep %p, v_sysrefs %d\n",
846 dep, ap->a_vp->v_sysref.refcnt);
984263bc
MD
847#endif
848 return (error);
849}
850
851/*
852 * DOS filesystems don't know what links are. But since we already called
853 * msdosfs_lookup() with create and lockparent, the parent is locked so we
854 * have to free it before we return the error.
4625f023
CP
855 *
856 * msdosfs_link(struct vnode *a_tdvp, struct vnode *a_vp,
857 * struct componentname *a_cnp)
984263bc
MD
858 */
859static int
e62afb5f 860msdosfs_link(struct vop_old_link_args *ap)
984263bc
MD
861{
862 return (EOPNOTSUPP);
863}
864
865/*
866 * Renames on files require moving the denode to a new hash queue since the
867 * denode's location is used to compute which hash queue to put the file
868 * in. Unless it is a rename in place. For example "mv a b".
869 *
870 * What follows is the basic algorithm:
871 *
872 * if (file move) {
873 * if (dest file exists) {
874 * remove dest file
875 * }
876 * if (dest and src in same directory) {
877 * rewrite name in existing directory slot
878 * } else {
879 * write new entry in dest directory
880 * update offset and dirclust in denode
881 * move denode to new hash chain
882 * clear old directory entry
883 * }
884 * } else {
885 * directory move
886 * if (dest directory exists) {
887 * if (dest is not empty) {
888 * return ENOTEMPTY
889 * }
890 * remove dest directory
891 * }
892 * if (dest and src in same directory) {
893 * rewrite name in existing entry
894 * } else {
895 * be sure dest is not a child of src directory
896 * write entry in dest directory
897 * update "." and ".." in moved directory
898 * clear old directory entry for moved directory
899 * }
900 * }
901 *
902 * On entry:
903 * source's parent directory is unlocked
904 * source file or directory is unlocked
905 * destination's parent directory is locked
906 * destination file or directory is locked if it exists
907 *
908 * On exit:
909 * all denodes should be released
910 *
911 * Notes:
912 * I'm not sure how the memory containing the pathnames pointed at by the
913 * componentname structures is freed, there may be some memory bleeding
914 * for each rename done.
4625f023
CP
915 *
916 * msdosfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp,
917 * struct componentname *a_fcnp, struct vnode *a_tdvp,
918 * struct vnode *a_tvp, struct componentname *a_tcnp)
984263bc
MD
919 */
920static int
e62afb5f 921msdosfs_rename(struct vop_old_rename_args *ap)
984263bc
MD
922{
923 struct vnode *tdvp = ap->a_tdvp;
924 struct vnode *fvp = ap->a_fvp;
925 struct vnode *fdvp = ap->a_fdvp;
926 struct vnode *tvp = ap->a_tvp;
927 struct componentname *tcnp = ap->a_tcnp;
928 struct componentname *fcnp = ap->a_fcnp;
984263bc
MD
929 struct denode *ip, *xp, *dp, *zp;
930 u_char toname[11], oldname[11];
931 u_long from_diroffset, to_diroffset;
932 u_char to_count;
933 int doingdirectory = 0, newparent = 0;
934 int error;
935 u_long cn;
936 daddr_t bn;
984263bc
MD
937 struct msdosfsmount *pmp;
938 struct direntry *dotdotp;
939 struct buf *bp;
940
984263bc
MD
941 pmp = VFSTOMSDOSFS(fdvp->v_mount);
942
984263bc
MD
943 /*
944 * Check for cross-device rename.
945 */
946 if ((fvp->v_mount != tdvp->v_mount) ||
947 (tvp && (fvp->v_mount != tvp->v_mount))) {
948 error = EXDEV;
949abortit:
950 if (tdvp == tvp)
951 vrele(tdvp);
952 else
953 vput(tdvp);
954 if (tvp)
955 vput(tvp);
956 vrele(fdvp);
957 vrele(fvp);
958 return (error);
959 }
960
961 /*
962 * If source and dest are the same, do nothing.
963 */
964 if (tvp == fvp) {
965 error = 0;
966 goto abortit;
967 }
968
fad57d0e
MD
969 /*
970 * fvp, fdvp are unlocked, tvp, tdvp are locked. Lock fvp and note
971 * that we have to unlock it to use the abortit target.
972 */
ca466bae 973 error = vn_lock(fvp, LK_EXCLUSIVE);
984263bc
MD
974 if (error)
975 goto abortit;
976 dp = VTODE(fdvp);
977 ip = VTODE(fvp);
978
979 /*
980 * Be sure we are not renaming ".", "..", or an alias of ".". This
981 * leads to a crippled directory tree. It's pretty tough to do a
982 * "ls" or "pwd" with the "." directory entry missing, and "cd .."
983 * doesn't work if the ".." entry is missing.
984 */
985 if (ip->de_Attributes & ATTR_DIRECTORY) {
986 /*
987 * Avoid ".", "..", and aliases of "." for obvious reasons.
988 */
989 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
990 dp == ip ||
2b69e610
MD
991 (fcnp->cn_flags & CNP_ISDOTDOT) ||
992 (tcnp->cn_flags & CNP_ISDOTDOT) ||
984263bc 993 (ip->de_flag & DE_RENAME)) {
a11aaa81 994 vn_unlock(fvp);
984263bc
MD
995 error = EINVAL;
996 goto abortit;
997 }
998 ip->de_flag |= DE_RENAME;
999 doingdirectory++;
1000 }
1001
1002 /*
fad57d0e
MD
1003 * fvp locked, fdvp unlocked, tvp, tdvp locked. DE_RENAME only
1004 * set if doingdirectory. We will get fvp unlocked in fairly
1005 * short order. dp and xp must be setup and fvp must be unlocked
1006 * for the out and bad targets to work properly.
984263bc
MD
1007 */
1008 dp = VTODE(tdvp);
1009 xp = tvp ? VTODE(tvp) : NULL;
fad57d0e 1010
984263bc
MD
1011 /*
1012 * Remember direntry place to use for destination
1013 */
1014 to_diroffset = dp->de_fndoffset;
1015 to_count = dp->de_fndcnt;
1016
1017 /*
1018 * If ".." must be changed (ie the directory gets a new
1019 * parent) then the source directory must not be in the
1020 * directory heirarchy above the target, as this would
1021 * orphan everything below the source directory. Also
1022 * the user must have write permission in the source so
1023 * as to be able to change "..". We must repeat the call
1024 * to namei, as the parent directory is unlocked by the
1025 * call to doscheckpath().
1026 */
cb66845a 1027 error = VOP_EACCESS(fvp, VWRITE, tcnp->cn_cred);
a11aaa81 1028 vn_unlock(fvp);
984263bc
MD
1029 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster)
1030 newparent = 1;
fad57d0e
MD
1031
1032 /*
1033 * ok. fvp, fdvp unlocked, tvp, tdvp locked. tvp may be NULL.
1034 * DE_RENAME only set if doingdirectory.
1035 */
984263bc
MD
1036 if (doingdirectory && newparent) {
1037 if (error) /* write access check above */
1038 goto bad;
fad57d0e 1039 if (xp != NULL) {
984263bc 1040 vput(tvp);
fad57d0e
MD
1041 xp = NULL;
1042 }
984263bc 1043 /*
fad57d0e
MD
1044 * checkpath vput's tdvp (VTOI(dp)) on return no matter what,
1045 * get an extra ref so we wind up with just an unlocked, ref'd
1046 * tdvp. The 'out' target skips tvp and tdvp cleanups (tdvp
1047 * isn't locked so we can't use the out target).
984263bc 1048 */
fad57d0e 1049 vref(tdvp);
984263bc 1050 error = doscheckpath(ip, dp);
6970b52a 1051 tcnp->cn_flags |= CNP_PDIRUNLOCK;
fad57d0e
MD
1052 if (error) {
1053 vrele(tdvp);
984263bc 1054 goto out;
fad57d0e
MD
1055 }
1056 /*
1057 * relookup no longer messes with the ref count. tdvp must
1058 * be unlocked on entry and on success will be locked on
1059 * return.
1060 */
984263bc 1061 error = relookup(tdvp, &tvp, tcnp);
fad57d0e
MD
1062 if (error) {
1063 if (tcnp->cn_flags & CNP_PDIRUNLOCK)
1064 vrele(tdvp);
1065 else
1066 vput(tdvp);
984263bc 1067 goto out;
fad57d0e
MD
1068 }
1069
1070 /*
1071 * tvp and tdvp are now locked again.
1072 */
984263bc
MD
1073 dp = VTODE(tdvp);
1074 xp = tvp ? VTODE(tvp) : NULL;
1075 }
1076
fad57d0e
MD
1077 /*
1078 * tvp and tdvp are now locked again, the 'bad' target can be used
1079 * to clean them up again. Delete an existant target and clean
1080 * up tvp. Set xp to NULL to indicate that tvp has been cleaned up.
1081 */
984263bc
MD
1082 if (xp != NULL) {
1083 /*
1084 * Target must be empty if a directory and have no links
1085 * to it. Also, ensure source and target are compatible
1086 * (both directories, or both not directories).
1087 */
1088 if (xp->de_Attributes & ATTR_DIRECTORY) {
1089 if (!dosdirempty(xp)) {
1090 error = ENOTEMPTY;
1091 goto bad;
1092 }
1093 if (!doingdirectory) {
1094 error = ENOTDIR;
1095 goto bad;
1096 }
984263bc
MD
1097 } else if (doingdirectory) {
1098 error = EISDIR;
1099 goto bad;
1100 }
1101 error = removede(dp, xp);
1102 if (error)
1103 goto bad;
1104 vput(tvp);
1105 xp = NULL;
fad57d0e 1106 tvp = NULL;
984263bc
MD
1107 }
1108
1109 /*
1110 * Convert the filename in tcnp into a dos filename. We copy this
1111 * into the denode and directory entry for the destination
1112 * file/directory.
1113 */
1114 error = uniqdosname(VTODE(tdvp), tcnp, toname);
1115 if (error)
fad57d0e 1116 goto bad;
984263bc
MD
1117
1118 /*
fad57d0e
MD
1119 * Since from wasn't locked at various places above, we have to do
1120 * a relookup here. If the target and source are the same directory
1121 * we have to unlock the target directory in order to safely relookup
1122 * the source, because relookup expects its directory to be unlocked.
1123 *
1124 * Note that ap->a_fvp is still valid and ref'd. Any cleanup must
1125 * now take that into account.
1126 *
1127 * The tdvp locking issues make this a real mess.
984263bc 1128 */
2b69e610 1129 fcnp->cn_flags &= ~CNP_MODMASK;
fad57d0e
MD
1130 fcnp->cn_flags |= CNP_LOCKPARENT;
1131 if (newparent == 0)
a11aaa81 1132 vn_unlock(tdvp);
fad57d0e
MD
1133 error = relookup(fdvp, &fvp, fcnp);
1134 if (error || fvp == NULL) {
984263bc 1135 /*
fad57d0e
MD
1136 * From name has disappeared. Note: fdvp might == tdvp.
1137 *
1138 * DE_RENAME is only set if doingdirectory.
984263bc
MD
1139 */
1140 if (doingdirectory)
1141 panic("rename: lost dir entry");
fad57d0e
MD
1142 if (fcnp->cn_flags & CNP_PDIRUNLOCK)
1143 vrele(fdvp);
1144 else
1145 vput(fdvp);
1146 if (newparent == 0)
1147 vrele(tdvp);
1148 else
1149 vput(tdvp);
984263bc 1150 vrele(ap->a_fvp);
fad57d0e 1151 return(0);
984263bc 1152 }
fad57d0e
MD
1153
1154 /*
1155 * No error occured. tdvp, fdvp and fvp are all locked. If
1156 * newparent was 0 be aware that fdvp == tdvp. tvp has been cleaned
1157 * up. ap->a_fvp is still refd.
1158 */
984263bc
MD
1159 xp = VTODE(fvp);
1160 zp = VTODE(fdvp);
1161 from_diroffset = zp->de_fndoffset;
1162
1163 /*
1164 * Ensure that the directory entry still exists and has not
1165 * changed till now. If the source is a file the entry may
1166 * have been unlinked or renamed. In either case there is
1167 * no further work to be done. If the source is a directory
1168 * then it cannot have been rmdir'ed or renamed; this is
1169 * prohibited by the DE_RENAME flag.
fad57d0e
MD
1170 *
1171 * DE_RENAME is only set if doingdirectory.
984263bc
MD
1172 */
1173 if (xp != ip) {
1174 if (doingdirectory)
1175 panic("rename: lost dir entry");
fad57d0e 1176 goto done;
984263bc 1177 } else {
3446c007
MD
1178 u_long new_dirclust;
1179 u_long new_diroffset;
1180
984263bc
MD
1181 /*
1182 * First write a new entry in the destination
1183 * directory and mark the entry in the source directory
1184 * as deleted. Then move the denode to the correct hash
1185 * chain for its new location in the filesystem. And, if
1186 * we moved a directory, then update its .. entry to point
1187 * to the new parent directory.
1188 */
1189 bcopy(ip->de_Name, oldname, 11);
1190 bcopy(toname, ip->de_Name, 11); /* update denode */
1191 dp->de_fndoffset = to_diroffset;
1192 dp->de_fndcnt = to_count;
60233e58 1193 error = createde(ip, dp, NULL, tcnp);
984263bc
MD
1194 if (error) {
1195 bcopy(oldname, ip->de_Name, 11);
fad57d0e 1196 goto done;
984263bc
MD
1197 }
1198 ip->de_refcnt++;
1199 zp->de_fndoffset = from_diroffset;
1200 error = removede(zp, ip);
1201 if (error) {
1202 /* XXX should really panic here, fs is corrupt */
fad57d0e 1203 goto done;
984263bc
MD
1204 }
1205 if (!doingdirectory) {
4afd80f1
MD
1206 error = pcbmap(dp, de_cluster(pmp, to_diroffset),
1207 NULL, &new_dirclust, NULL);
984263bc
MD
1208 if (error) {
1209 /* XXX should really panic here, fs is corrupt */
fad57d0e 1210 goto done;
984263bc 1211 }
3446c007
MD
1212 if (new_dirclust == MSDOSFSROOT)
1213 new_diroffset = to_diroffset;
984263bc 1214 else
3446c007
MD
1215 new_diroffset = to_diroffset & pmp->pm_crbomask;
1216 msdosfs_reinsert(ip, new_dirclust, new_diroffset);
984263bc 1217 }
984263bc
MD
1218 }
1219
1220 /*
1221 * If we moved a directory to a new parent directory, then we must
1222 * fixup the ".." entry in the moved directory.
1223 */
1224 if (doingdirectory && newparent) {
1225 cn = ip->de_StartCluster;
1226 if (cn == MSDOSFSROOT) {
1227 /* this should never happen */
1228 panic("msdosfs_rename(): updating .. in root directory?");
fad57d0e 1229 } else {
4afd80f1 1230 bn = xcntobn(pmp, cn);
fad57d0e 1231 }
54078292 1232 error = bread(pmp->pm_devvp, de_bntodoff(pmp, bn), pmp->pm_bpcluster, &bp);
984263bc
MD
1233 if (error) {
1234 /* XXX should really panic here, fs is corrupt */
1235 brelse(bp);
fad57d0e 1236 goto done;
984263bc
MD
1237 }
1238 dotdotp = (struct direntry *)bp->b_data + 1;
1239 putushort(dotdotp->deStartCluster, dp->de_StartCluster);
1240 if (FAT32(pmp))
1241 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16);
1242 error = bwrite(bp);
1243 if (error) {
1244 /* XXX should really panic here, fs is corrupt */
fad57d0e 1245 goto done;
984263bc
MD
1246 }
1247 }
1248
fad57d0e
MD
1249 /*
1250 * done case fvp, fdvp, tdvp are locked. ap->a_fvp is refd
1251 */
1252done:
1253 if (doingdirectory)
1254 ip->de_flag &= ~DE_RENAME; /* XXX fvp not locked */
1255 vput(fvp);
1256 if (newparent)
1257 vput(fdvp);
1258 else
1259 vrele(fdvp);
1260 vput(tdvp);
1261 vrele(ap->a_fvp);
1262 return (error);
1263
1264 /*
1265 * 'bad' target: xp governs tvp. tvp and tdvp arel ocked, fdvp and fvp
1266 * are not locked. ip points to fvp's inode which may have DE_RENAME
1267 * set.
1268 */
984263bc
MD
1269bad:
1270 if (xp)
1271 vput(tvp);
1272 vput(tdvp);
1273out:
fad57d0e
MD
1274 /*
1275 * 'out' target: tvp and tdvp have already been cleaned up.
1276 */
1277 if (doingdirectory)
1278 ip->de_flag &= ~DE_RENAME;
984263bc
MD
1279 vrele(fdvp);
1280 vrele(fvp);
1281 return (error);
1282
1283}
1284
1285static struct {
1286 struct direntry dot;
1287 struct direntry dotdot;
1288} dosdirtemplate = {
1289 { ". ", " ", /* the . entry */
1290 ATTR_DIRECTORY, /* file attribute */
1291 0, /* reserved */
1292 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1293 { 0, 0 }, /* access date */
1294 { 0, 0 }, /* high bits of start cluster */
1295 { 210, 4 }, { 210, 4 }, /* modify time & date */
1296 { 0, 0 }, /* startcluster */
1297 { 0, 0, 0, 0 } /* filesize */
1298 },
1299 { ".. ", " ", /* the .. entry */
1300 ATTR_DIRECTORY, /* file attribute */
1301 0, /* reserved */
1302 0, { 0, 0 }, { 0, 0 }, /* create time & date */
1303 { 0, 0 }, /* access date */
1304 { 0, 0 }, /* high bits of start cluster */
1305 { 210, 4 }, { 210, 4 }, /* modify time & date */
1306 { 0, 0 }, /* startcluster */
1307 { 0, 0, 0, 0 } /* filesize */
1308 }
1309};
1310
4625f023
CP
1311/*
1312 * msdosfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp,
1313 * struct componentname *a_cnp, struct vattr *a_vap)
1314 */
984263bc 1315static int
e62afb5f 1316msdosfs_mkdir(struct vop_old_mkdir_args *ap)
984263bc
MD
1317{
1318 struct componentname *cnp = ap->a_cnp;
1319 struct denode *dep;
1320 struct denode *pdep = VTODE(ap->a_dvp);
1321 struct direntry *denp;
1322 struct msdosfsmount *pmp = pdep->de_pmp;
1323 struct buf *bp;
1324 u_long newcluster, pcl;
1325 int bn;
1326 int error;
1327 struct denode ndirent;
1328 struct timespec ts;
1329
1330 /*
1331 * If this is the root directory and there is no space left we
1332 * can't do anything. This is because the root directory can not
1333 * change size.
1334 */
1335 if (pdep->de_StartCluster == MSDOSFSROOT
1336 && pdep->de_fndoffset >= pdep->de_FileSize) {
1337 error = ENOSPC;
1338 goto bad2;
1339 }
1340
1341 /*
1342 * Allocate a cluster to hold the about to be created directory.
1343 */
1344 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL);
1345 if (error)
1346 goto bad2;
1347
1348 bzero(&ndirent, sizeof(ndirent));
1349 ndirent.de_pmp = pmp;
1350 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
1351 getnanotime(&ts);
1352 DETIMES(&ndirent, &ts, &ts, &ts);
1353
1354 /*
1355 * Now fill the cluster with the "." and ".." entries. And write
1356 * the cluster to disk. This way it is there for the parent
1357 * directory to be pointing at if there were a crash.
1358 */
4afd80f1 1359 bn = xcntobn(pmp, newcluster);
984263bc 1360 /* always succeeds */
54078292
MD
1361 bp = getblk(pmp->pm_devvp, de_bntodoff(pmp, bn),
1362 pmp->pm_bpcluster, 0, 0);
984263bc
MD
1363 bzero(bp->b_data, pmp->pm_bpcluster);
1364 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate);
1365 denp = (struct direntry *)bp->b_data;
1366 putushort(denp[0].deStartCluster, newcluster);
1367 putushort(denp[0].deCDate, ndirent.de_CDate);
1368 putushort(denp[0].deCTime, ndirent.de_CTime);
1369 denp[0].deCHundredth = ndirent.de_CHun;
1370 putushort(denp[0].deADate, ndirent.de_ADate);
1371 putushort(denp[0].deMDate, ndirent.de_MDate);
1372 putushort(denp[0].deMTime, ndirent.de_MTime);
1373 pcl = pdep->de_StartCluster;
1374 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk)
1375 pcl = 0;
1376 putushort(denp[1].deStartCluster, pcl);
1377 putushort(denp[1].deCDate, ndirent.de_CDate);
1378 putushort(denp[1].deCTime, ndirent.de_CTime);
1379 denp[1].deCHundredth = ndirent.de_CHun;
1380 putushort(denp[1].deADate, ndirent.de_ADate);
1381 putushort(denp[1].deMDate, ndirent.de_MDate);
1382 putushort(denp[1].deMTime, ndirent.de_MTime);
1383 if (FAT32(pmp)) {
1384 putushort(denp[0].deHighClust, newcluster >> 16);
1385 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16);
1386 }
1387
1388 error = bwrite(bp);
1389 if (error)
1390 goto bad;
1391
1392 /*
1393 * Now build up a directory entry pointing to the newly allocated
1394 * cluster. This will be written to an empty slot in the parent
1395 * directory.
1396 */
984263bc
MD
1397 error = uniqdosname(pdep, cnp, ndirent.de_Name);
1398 if (error)
1399 goto bad;
1400
1401 ndirent.de_Attributes = ATTR_DIRECTORY;
1402 ndirent.de_LowerCase = 0;
1403 ndirent.de_StartCluster = newcluster;
1404 ndirent.de_FileSize = 0;
1405 ndirent.de_dev = pdep->de_dev;
1406 ndirent.de_devvp = pdep->de_devvp;
1407 error = createde(&ndirent, pdep, &dep, cnp);
1408 if (error)
1409 goto bad;
1410 *ap->a_vpp = DETOV(dep);
1411 return (0);
1412
1413bad:
1414 clusterfree(pmp, newcluster, NULL);
1415bad2:
1416 return (error);
1417}
1418
4625f023
CP
1419/*
1420 * msdosfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp,
1421 * struct componentname *a_cnp)
1422 */
984263bc 1423static int
e62afb5f 1424msdosfs_rmdir(struct vop_old_rmdir_args *ap)
984263bc 1425{
dadab5e9
MD
1426 struct vnode *vp = ap->a_vp;
1427 struct vnode *dvp = ap->a_dvp;
dadab5e9 1428 struct denode *ip, *dp;
984263bc
MD
1429 int error;
1430
1431 ip = VTODE(vp);
1432 dp = VTODE(dvp);
1433
1434 /*
1435 * Verify the directory is empty (and valid).
1436 * (Rmdir ".." won't be valid since
1437 * ".." will contain a reference to
1438 * the current directory and thus be
1439 * non-empty.)
1440 */
1441 error = 0;
1442 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) {
1443 error = ENOTEMPTY;
1444 goto out;
1445 }
1446 /*
1447 * Delete the entry from the directory. For dos filesystems this
1448 * gets rid of the directory entry on disk, the in memory copy
1449 * still exists but the de_refcnt is <= 0. This prevents it from
1450 * being found by deget(). When the vput() on dep is done we give
1451 * up access and eventually msdosfs_reclaim() will be called which
1452 * will remove it from the denode cache.
1453 */
1454 error = removede(dp, ip);
1455 if (error)
1456 goto out;
1457 /*
1458 * This is where we decrement the link count in the parent
1459 * directory. Since dos filesystems don't do this we just purge
1460 * the name cache.
1461 */
a11aaa81 1462 vn_unlock(dvp);
984263bc
MD
1463 /*
1464 * Truncate the directory that is being deleted.
1465 */
87de5057 1466 error = detrunc(ip, (u_long)0, IO_SYNC);
984263bc 1467
ca466bae 1468 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
984263bc
MD
1469out:
1470 return (error);
1471}
1472
1473/*
1474 * DOS filesystems don't know what symlinks are.
4625f023
CP
1475 *
1476 * msdosfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp,
1477 * struct componentname *a_cnp, struct vattr *a_vap,
1478 * char *a_target)
984263bc
MD
1479 */
1480static int
e62afb5f 1481msdosfs_symlink(struct vop_old_symlink_args *ap)
984263bc
MD
1482{
1483 return (EOPNOTSUPP);
1484}
1485
4625f023
CP
1486/*
1487 * msdosfs_readdir(struct vnode *a_vp, struct uio *a_uio,
1488 * struct ucred *a_cred, int *a_eofflag, int *a_ncookies,
84009d92 1489 * off_t **a_cookies)
4625f023 1490 */
984263bc 1491static int
4625f023 1492msdosfs_readdir(struct vop_readdir_args *ap)
984263bc 1493{
3435d577 1494 struct mbnambuf nb;
984263bc
MD
1495 int error = 0;
1496 int diff;
1497 long n;
1498 int blsize;
1499 long on;
1500 u_long cn;
984263bc
MD
1501 u_long dirsperblk;
1502 long bias = 0;
1503 daddr_t bn, lbn;
1504 struct buf *bp;
885ecb13
MD
1505 struct denode *dep;
1506 struct msdosfsmount *pmp;
984263bc 1507 struct direntry *dentp;
984263bc 1508 struct uio *uio = ap->a_uio;
84009d92 1509 off_t *cookies = NULL;
984263bc
MD
1510 int ncookies = 0;
1511 off_t offset, off;
1512 int chksum = -1;
1754e0da
JS
1513 ino_t d_ino;
1514 uint16_t d_namlen;
1515 uint8_t d_type;
1516 char *d_name_storage = NULL;
3435d577 1517 char *d_name = NULL;
984263bc 1518
885ecb13
MD
1519 if ((error = vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY)) != 0)
1520 return (error);
1521
1522 dep = VTODE(ap->a_vp);
1523 pmp = dep->de_pmp;
1524
984263bc 1525#ifdef MSDOSFS_DEBUG
086c1d7e 1526 kprintf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n",
984263bc
MD
1527 ap->a_vp, uio, ap->a_cred, ap->a_eofflag);
1528#endif
1529
1530 /*
1531 * msdosfs_readdir() won't operate properly on regular files since
1532 * it does i/o only with the the filesystem vnode, and hence can
1533 * retrieve the wrong block from the buffer cache for a plain file.
1534 * So, fail attempts to readdir() on a plain file.
1535 */
885ecb13
MD
1536 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) {
1537 error = ENOTDIR;
1538 goto done;
1539 }
984263bc
MD
1540
1541 /*
984263bc
MD
1542 * If the user buffer is smaller than the size of one dos directory
1543 * entry or the file offset is not a multiple of the size of a
1544 * directory entry, then we fail the read.
1545 */
1546 off = offset = uio->uio_offset;
1547 if (uio->uio_resid < sizeof(struct direntry) ||
885ecb13
MD
1548 (offset & (sizeof(struct direntry) - 1))) {
1549 error = EINVAL;
1550 goto done;
1551 }
984263bc
MD
1552
1553 if (ap->a_ncookies) {
fb0466c9
MD
1554 ncookies = uio->uio_resid / 16 + 1;
1555 if (ncookies > 1024)
1556 ncookies = 1024;
884717e1 1557 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
984263bc
MD
1558 *ap->a_cookies = cookies;
1559 *ap->a_ncookies = ncookies;
1560 }
1561
1562 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
1563
1564 /*
1565 * If they are reading from the root directory then, we simulate
1566 * the . and .. entries since these don't exist in the root
1567 * directory. We also set the offset bias to make up for having to
1568 * simulate these entries. By this I mean that at file offset 64 we
1569 * read the first entry in the root directory that lives on disk.
1570 */
1571 if (dep->de_StartCluster == MSDOSFSROOT
1572 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) {
1573#if 0
086c1d7e 1574 kprintf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n",
984263bc
MD
1575 offset);
1576#endif
1577 bias = 2 * sizeof(struct direntry);
1578 if (offset < bias) {
1754e0da
JS
1579 for (n = (int)offset / sizeof(struct direntry); n < 2;
1580 n++) {
984263bc 1581 if (FAT32(pmp))
4afd80f1 1582 d_ino = xcntobn(pmp, pmp->pm_rootdirblk)
1754e0da 1583 * dirsperblk;
984263bc 1584 else
1754e0da
JS
1585 d_ino = 1;
1586 d_type = DT_DIR;
1587 if (n == 0) {
1588 d_namlen = 1;
1589 d_name = ".";
3435d577 1590 } else if (n == 1) {
1754e0da
JS
1591 d_namlen = 2;
1592 d_name = "..";
984263bc 1593 }
1754e0da
JS
1594 if (vop_write_dirent(&error, uio, d_ino, d_type,
1595 d_namlen, d_name))
984263bc 1596 goto out;
984263bc
MD
1597 if (error)
1598 goto out;
1599 offset += sizeof(struct direntry);
1600 off = offset;
1601 if (cookies) {
1602 *cookies++ = offset;
1603 if (--ncookies <= 0)
1604 goto out;
1605 }
1606 }
1607 }
1608 }
1609
efda3bd0 1610 d_name_storage = kmalloc(WIN_MAXLEN, M_TEMP, M_WAITOK);
3435d577 1611 mbnambuf_init(&nb);
984263bc 1612 off = offset;
1754e0da 1613
984263bc 1614 while (uio->uio_resid > 0) {
4afd80f1 1615 lbn = de_off2cn(pmp, offset - bias);
984263bc 1616 on = (offset - bias) & pmp->pm_crbomask;
e54488bb 1617 n = szmin(pmp->pm_bpcluster - on, uio->uio_resid);
984263bc
MD
1618 diff = dep->de_FileSize - (offset - bias);
1619 if (diff <= 0)
1620 break;
1621 n = min(n, diff);
1622 error = pcbmap(dep, lbn, &bn, &cn, &blsize);
1623 if (error)
1624 break;
54078292 1625 error = bread(pmp->pm_devvp, de_bntodoff(pmp, bn), blsize, &bp);
984263bc
MD
1626 if (error) {
1627 brelse(bp);
efda3bd0 1628 kfree(d_name_storage, M_TEMP);
885ecb13 1629 goto done;
984263bc
MD
1630 }
1631 n = min(n, blsize - bp->b_resid);
1632
1633 /*
1634 * Convert from dos directory entries to fs-independent
1635 * directory entries.
1636 */
1637 for (dentp = (struct direntry *)(bp->b_data + on);
1638 (char *)dentp < bp->b_data + on + n;
1639 dentp++, offset += sizeof(struct direntry)) {
1640#if 0
086c1d7e 1641 kprintf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n",
984263bc
MD
1642 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes);
1643#endif
1754e0da 1644 d_name = d_name_storage;
3435d577 1645 d_namlen = 0;
984263bc
MD
1646 /*
1647 * If this is an unused entry, we can stop.
1648 */
1649 if (dentp->deName[0] == SLOT_EMPTY) {
1650 brelse(bp);
1651 goto out;
1652 }
1653 /*
1654 * Skip deleted entries.
1655 */
1656 if (dentp->deName[0] == SLOT_DELETED) {
1657 chksum = -1;
3435d577 1658 mbnambuf_init(&nb);
984263bc
MD
1659 continue;
1660 }
984263bc
MD
1661 /*
1662 * Handle Win95 long directory entries
1663 */
1664 if (dentp->deAttributes == ATTR_WIN95) {
1665 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME)
1666 continue;
3435d577
AP
1667 chksum = win2unixfn(&nb,
1668 (struct winentry *)dentp,
1669 chksum,
1670 pmp);
984263bc
MD
1671 continue;
1672 }
1673
1674 /*
1675 * Skip volume labels
1676 */
1677 if (dentp->deAttributes & ATTR_VOLUME) {
1678 chksum = -1;
3435d577 1679 mbnambuf_init(&nb);
984263bc
MD
1680 continue;
1681 }
1682 /*
1754e0da 1683 * This computation of d_ino must match
984263bc
MD
1684 * the computation of va_fileid in
1685 * msdosfs_getattr.
1686 */
1687 if (dentp->deAttributes & ATTR_DIRECTORY) {
1754e0da 1688 d_ino = getushort(dentp->deStartCluster);
984263bc 1689 if (FAT32(pmp))
1754e0da 1690 d_ino |= getushort(dentp->deHighClust) << 16;
984263bc 1691 /* if this is the root directory */
1754e0da 1692 if (d_ino != MSDOSFSROOT)
4afd80f1 1693 d_ino = xcntobn(pmp, d_ino) * dirsperblk;
1754e0da 1694 else if (FAT32(pmp))
4afd80f1 1695 d_ino = xcntobn(pmp, pmp->pm_rootdirblk)
1754e0da 1696 * dirsperblk;
984263bc 1697 else
1754e0da
JS
1698 d_ino = 1;
1699 d_type = DT_DIR;
984263bc 1700 } else {
1754e0da
JS
1701 d_ino = offset / sizeof(struct direntry);
1702 d_type = DT_REG;
984263bc 1703 }
1754e0da
JS
1704 if (chksum != winChksum(dentp->deName)) {
1705 d_namlen = dos2unixfn(dentp->deName,
1706 (u_char *)d_name,
984263bc
MD
1707 dentp->deLowerCase |
1708 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ?
1709 (LCASE_BASE | LCASE_EXT) : 0),
3435d577
AP
1710 pmp);
1711 mbnambuf_init(&nb);
1712 } else {
1713 mbnambuf_flush(&nb, d_name, &d_namlen);
1714}
984263bc 1715 chksum = -1;
1754e0da
JS
1716 if (vop_write_dirent(&error, uio, d_ino, d_type,
1717 d_namlen, d_name)) {
984263bc
MD
1718 brelse(bp);
1719 goto out;
1720 }
984263bc
MD
1721 if (error) {
1722 brelse(bp);
1723 goto out;
1724 }
1754e0da 1725
984263bc
MD
1726 if (cookies) {
1727 *cookies++ = offset + sizeof(struct direntry);
1728 if (--ncookies <= 0) {
1729 brelse(bp);
1730 goto out;
1731 }
1732 }
1733 off = offset + sizeof(struct direntry);
1734 }
1735 brelse(bp);
1736 }
1737out:
1754e0da 1738 if (d_name_storage != NULL)
efda3bd0 1739 kfree(d_name_storage, M_TEMP);
1754e0da 1740
984263bc
MD
1741 /* Subtract unused cookies */
1742 if (ap->a_ncookies)
1743 *ap->a_ncookies -= ncookies;
1744
1745 uio->uio_offset = off;
1746
1747 /*
1748 * Set the eofflag (NFS uses it)
1749 */
1750 if (ap->a_eofflag) {
1751 if (dep->de_FileSize - (offset - bias) <= 0)
1752 *ap->a_eofflag = 1;
1753 else
1754 *ap->a_eofflag = 0;
1755 }
885ecb13
MD
1756done:
1757 vn_unlock(ap->a_vp);
984263bc
MD
1758 return (error);
1759}
1760
1761/*
1762 * vp - address of vnode file the file
1763 * bn - which cluster we are interested in mapping to a filesystem block number.
1764 * vpp - returns the vnode for the block special file holding the filesystem
1765 * containing the file of interest
1766 * bnp - address of where to return the filesystem relative block number
4625f023 1767 *
08daea96 1768 * msdosfs_bmap(struct vnode *a_vp, off_t a_loffset,
54078292 1769 * off_t *a_doffsetp, int *a_runp, int *a_runb)
984263bc
MD
1770 */
1771static int
4625f023 1772msdosfs_bmap(struct vop_bmap_args *ap)
984263bc
MD
1773{
1774 struct denode *dep = VTODE(ap->a_vp);
54078292
MD
1775 struct msdosfsmount *pmp = dep->de_pmp;
1776 daddr_t lbn;
1777 daddr_t dbn;
1778 int error;
984263bc 1779
54078292 1780 if (ap->a_doffsetp == NULL)
984263bc
MD
1781 return (0);
1782 if (ap->a_runp) {
1783 /*
1784 * Sequential clusters should be counted here.
1785 */
1786 *ap->a_runp = 0;
1787 }
1788 if (ap->a_runb) {
1789 *ap->a_runb = 0;
1790 }
4afd80f1
MD
1791 KKASSERT(((int)ap->a_loffset & ((1 << pmp->pm_cnshift) - 1)) == 0);
1792 lbn = de_off2cn(pmp, ap->a_loffset);
1793 error = pcbmap(dep, lbn, &dbn, NULL, NULL);
54078292
MD
1794 if (error || dbn == (daddr_t)-1) {
1795 *ap->a_doffsetp = NOOFFSET;
1796 } else {
4afd80f1 1797 *ap->a_doffsetp = de_bntodoff(pmp, dbn);
54078292
MD
1798 }
1799 return (error);
984263bc
MD
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);
54078292 1813 struct msdosfsmount *pmp = dep->de_pmp;
984263bc 1814 int error = 0;
54078292 1815 daddr_t dblkno;
984263bc 1816
81b5c339 1817 if (vp->v_type == VBLK || vp->v_type == VCHR)
984263bc
MD
1818 panic("msdosfs_strategy: spec");
1819 /*
1820 * If we don't already know the filesystem relative block number
1821 * then get it using pcbmap(). If pcbmap() returns the block
1822 * number as -1 then we've got a hole in the file. DOS filesystems
1823 * don't allow files with holes, so we shouldn't ever see this.
1824 */
81b5c339 1825 nbio = push_bio(bio);
54078292 1826 if (nbio->bio_offset == NOOFFSET) {
4afd80f1
MD
1827 error = pcbmap(dep, de_off2cn(pmp, bio->bio_offset),
1828 &dblkno, NULL, NULL);
984263bc
MD
1829 if (error) {
1830 bp->b_error = error;
1831 bp->b_flags |= B_ERROR;
81b5c339
MD
1832 /* I/O was never started on nbio, must biodone(bio) */
1833 biodone(bio);
984263bc
MD
1834 return (error);
1835 }
54078292
MD
1836 if (dblkno == (daddr_t)-1) {
1837 nbio->bio_offset = NOOFFSET;
984263bc 1838 vfs_bio_clrbuf(bp);
54078292 1839 } else {
4afd80f1 1840 nbio->bio_offset = de_bntodoff(pmp, dblkno);
54078292 1841 }
984263bc 1842 }
54078292 1843 if (nbio->bio_offset == NOOFFSET) {
81b5c339
MD
1844 /* I/O was never started on nbio, must biodone(bio) */
1845 biodone(bio);
984263bc
MD
1846 return (0);
1847 }
1848 /*
1849 * Read/write the block from/to the disk that contains the desired
1850 * file block.
1851 */
81b5c339 1852 vn_strategy(dep->de_devvp, nbio);
984263bc
MD
1853 return (0);
1854}
1855
4625f023
CP
1856/*
1857 * msdosfs_print(struct vnode *vp)
1858 */
984263bc 1859static int
4625f023 1860msdosfs_print(struct vop_print_args *ap)
984263bc
MD
1861{
1862 struct denode *dep = VTODE(ap->a_vp);
1863
086c1d7e 1864 kprintf(
984263bc
MD
1865 "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ",
1866 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset);
086c1d7e 1867 kprintf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev));
3446c007 1868 lockmgr_printinfo(&ap->a_vp->v_lock);
086c1d7e 1869 kprintf("\n");
984263bc
MD
1870 return (0);
1871}
1872
4625f023
CP
1873/*
1874 * msdosfs_pathconf(struct vnode *a_vp, int a_name, int *a_retval)
1875 */
984263bc 1876static int
4625f023 1877msdosfs_pathconf(struct vop_pathconf_args *ap)
984263bc
MD
1878{
1879 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp;
1880
1881 switch (ap->a_name) {
1882 case _PC_LINK_MAX:
1883 *ap->a_retval = 1;
1884 return (0);
1885 case _PC_NAME_MAX:
1886 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12;
1887 return (0);
1888 case _PC_PATH_MAX:
1889 *ap->a_retval = PATH_MAX;
1890 return (0);
1891 case _PC_CHOWN_RESTRICTED:
1892 *ap->a_retval = 1;
1893 return (0);
1894 case _PC_NO_TRUNC:
1895 *ap->a_retval = 0;
1896 return (0);
1897 default:
1898 return (EINVAL);
1899 }
1900 /* NOTREACHED */
1901}
1902
984263bc 1903/* Global vfs data structures for msdosfs */
66a1ddf5
MD
1904struct vop_ops msdosfs_vnode_vops = {
1905 .vop_default = vop_defaultop,
1906 .vop_access = msdosfs_access,
1907 .vop_bmap = msdosfs_bmap,
1908 .vop_old_lookup = msdosfs_lookup,
1909 .vop_open = msdosfs_open,
1910 .vop_close = msdosfs_close,
1911 .vop_old_create = msdosfs_create,
1912 .vop_fsync = msdosfs_fsync,
1913 .vop_getattr = msdosfs_getattr,
1914 .vop_inactive = msdosfs_inactive,
66a1ddf5 1915 .vop_old_link = msdosfs_link,
66a1ddf5
MD
1916 .vop_old_mkdir = msdosfs_mkdir,
1917 .vop_old_mknod = msdosfs_mknod,
1918 .vop_pathconf = msdosfs_pathconf,
1919 .vop_print = msdosfs_print,
1920 .vop_read = msdosfs_read,
1921 .vop_readdir = msdosfs_readdir,
1922 .vop_reclaim = msdosfs_reclaim,
1923 .vop_old_remove = msdosfs_remove,
1924 .vop_old_rename = msdosfs_rename,
1925 .vop_old_rmdir = msdosfs_rmdir,
1926 .vop_setattr = msdosfs_setattr,
1927 .vop_strategy = msdosfs_strategy,
1928 .vop_old_symlink = msdosfs_symlink,
66a1ddf5 1929 .vop_write = msdosfs_write,
1787385d
MD
1930 .vop_getpages = vop_stdgetpages,
1931 .vop_putpages = vop_stdputpages
984263bc 1932};