Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * super.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Super block routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
7 | * DESCRIPTION | |
8 | * OSTA-UDF(tm) = Optical Storage Technology Association | |
9 | * Universal Disk Format. | |
10 | * | |
11 | * This code is based on version 2.00 of the UDF specification, | |
12 | * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346]. | |
13 | * http://www.osta.org/ | |
14 | * http://www.ecma.ch/ | |
15 | * http://www.iso.org/ | |
16 | * | |
1da177e4 LT |
17 | * COPYRIGHT |
18 | * This file is distributed under the terms of the GNU General Public | |
19 | * License (GPL). Copies of the GPL can be obtained from: | |
20 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
21 | * Each contributing author retains all rights to their own work. | |
22 | * | |
23 | * (C) 1998 Dave Boynton | |
24 | * (C) 1998-2004 Ben Fennema | |
25 | * (C) 2000 Stelias Computing Inc | |
26 | * | |
27 | * HISTORY | |
28 | * | |
29 | * 09/24/98 dgb changed to allow compiling outside of kernel, and | |
30 | * added some debugging. | |
31 | * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34 | |
32 | * 10/16/98 attempting some multi-session support | |
33 | * 10/17/98 added freespace count for "df" | |
34 | * 11/11/98 gr added novrs option | |
35 | * 11/26/98 dgb added fileset,anchor mount options | |
36 | * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced vol descs | |
37 | * rewrote option handling based on isofs | |
38 | * 12/20/98 find the free space bitmap (if it exists) | |
39 | */ | |
40 | ||
41 | #include "udfdecl.h" | |
42 | ||
1da177e4 LT |
43 | #include <linux/blkdev.h> |
44 | #include <linux/slab.h> | |
45 | #include <linux/kernel.h> | |
46 | #include <linux/module.h> | |
47 | #include <linux/parser.h> | |
48 | #include <linux/stat.h> | |
49 | #include <linux/cdrom.h> | |
50 | #include <linux/nls.h> | |
51 | #include <linux/smp_lock.h> | |
52 | #include <linux/buffer_head.h> | |
53 | #include <linux/vfs.h> | |
54 | #include <linux/vmalloc.h> | |
55 | #include <asm/byteorder.h> | |
56 | ||
57 | #include <linux/udf_fs.h> | |
58 | #include "udf_sb.h" | |
59 | #include "udf_i.h" | |
60 | ||
61 | #include <linux/init.h> | |
62 | #include <asm/uaccess.h> | |
63 | ||
64 | #define VDS_POS_PRIMARY_VOL_DESC 0 | |
65 | #define VDS_POS_UNALLOC_SPACE_DESC 1 | |
66 | #define VDS_POS_LOGICAL_VOL_DESC 2 | |
67 | #define VDS_POS_PARTITION_DESC 3 | |
68 | #define VDS_POS_IMP_USE_VOL_DESC 4 | |
69 | #define VDS_POS_VOL_DESC_PTR 5 | |
70 | #define VDS_POS_TERMINATING_DESC 6 | |
71 | #define VDS_POS_LENGTH 7 | |
72 | ||
73 | static char error_buf[1024]; | |
74 | ||
75 | /* These are the "meat" - everything else is stuffing */ | |
76 | static int udf_fill_super(struct super_block *, void *, int); | |
77 | static void udf_put_super(struct super_block *); | |
78 | static void udf_write_super(struct super_block *); | |
79 | static int udf_remount_fs(struct super_block *, int *, char *); | |
80 | static int udf_check_valid(struct super_block *, int, int); | |
81 | static int udf_vrs(struct super_block *sb, int silent); | |
82 | static int udf_load_partition(struct super_block *, kernel_lb_addr *); | |
83 | static int udf_load_logicalvol(struct super_block *, struct buffer_head *, kernel_lb_addr *); | |
84 | static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad); | |
85 | static void udf_find_anchor(struct super_block *); | |
86 | static int udf_find_fileset(struct super_block *, kernel_lb_addr *, kernel_lb_addr *); | |
87 | static void udf_load_pvoldesc(struct super_block *, struct buffer_head *); | |
88 | static void udf_load_fileset(struct super_block *, struct buffer_head *, kernel_lb_addr *); | |
89 | static void udf_load_partdesc(struct super_block *, struct buffer_head *); | |
90 | static void udf_open_lvid(struct super_block *); | |
91 | static void udf_close_lvid(struct super_block *); | |
92 | static unsigned int udf_count_free(struct super_block *); | |
726c3342 | 93 | static int udf_statfs(struct dentry *, struct kstatfs *); |
1da177e4 LT |
94 | |
95 | /* UDF filesystem type */ | |
454e2398 DH |
96 | static int udf_get_sb(struct file_system_type *fs_type, |
97 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 98 | { |
454e2398 | 99 | return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt); |
1da177e4 LT |
100 | } |
101 | ||
102 | static struct file_system_type udf_fstype = { | |
103 | .owner = THIS_MODULE, | |
104 | .name = "udf", | |
105 | .get_sb = udf_get_sb, | |
106 | .kill_sb = kill_block_super, | |
107 | .fs_flags = FS_REQUIRES_DEV, | |
108 | }; | |
109 | ||
e18b890b | 110 | static struct kmem_cache * udf_inode_cachep; |
1da177e4 LT |
111 | |
112 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
113 | { | |
114 | struct udf_inode_info *ei; | |
e94b1766 | 115 | ei = (struct udf_inode_info *)kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
116 | if (!ei) |
117 | return NULL; | |
95f8797f DB |
118 | |
119 | ei->i_unique = 0; | |
120 | ei->i_lenExtents = 0; | |
121 | ei->i_next_alloc_block = 0; | |
122 | ei->i_next_alloc_goal = 0; | |
123 | ei->i_strat4096 = 0; | |
124 | ||
1da177e4 LT |
125 | return &ei->vfs_inode; |
126 | } | |
127 | ||
128 | static void udf_destroy_inode(struct inode *inode) | |
129 | { | |
130 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); | |
131 | } | |
132 | ||
e18b890b | 133 | static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags) |
1da177e4 LT |
134 | { |
135 | struct udf_inode_info *ei = (struct udf_inode_info *) foo; | |
136 | ||
137 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == | |
138 | SLAB_CTOR_CONSTRUCTOR) | |
139 | { | |
140 | ei->i_ext.i_data = NULL; | |
141 | inode_init_once(&ei->vfs_inode); | |
142 | } | |
143 | } | |
144 | ||
145 | static int init_inodecache(void) | |
146 | { | |
147 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
148 | sizeof(struct udf_inode_info), | |
fffb60f9 PJ |
149 | 0, (SLAB_RECLAIM_ACCOUNT| |
150 | SLAB_MEM_SPREAD), | |
1da177e4 LT |
151 | init_once, NULL); |
152 | if (udf_inode_cachep == NULL) | |
153 | return -ENOMEM; | |
154 | return 0; | |
155 | } | |
156 | ||
157 | static void destroy_inodecache(void) | |
158 | { | |
1a1d92c1 | 159 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
160 | } |
161 | ||
162 | /* Superblock operations */ | |
163 | static struct super_operations udf_sb_ops = { | |
164 | .alloc_inode = udf_alloc_inode, | |
165 | .destroy_inode = udf_destroy_inode, | |
166 | .write_inode = udf_write_inode, | |
167 | .delete_inode = udf_delete_inode, | |
168 | .clear_inode = udf_clear_inode, | |
169 | .put_super = udf_put_super, | |
170 | .write_super = udf_write_super, | |
171 | .statfs = udf_statfs, | |
172 | .remount_fs = udf_remount_fs, | |
173 | }; | |
174 | ||
175 | struct udf_options | |
176 | { | |
177 | unsigned char novrs; | |
178 | unsigned int blocksize; | |
179 | unsigned int session; | |
180 | unsigned int lastblock; | |
181 | unsigned int anchor; | |
182 | unsigned int volume; | |
183 | unsigned short partition; | |
184 | unsigned int fileset; | |
185 | unsigned int rootdir; | |
186 | unsigned int flags; | |
187 | mode_t umask; | |
188 | gid_t gid; | |
189 | uid_t uid; | |
190 | struct nls_table *nls_map; | |
191 | }; | |
192 | ||
193 | static int __init init_udf_fs(void) | |
194 | { | |
195 | int err; | |
196 | err = init_inodecache(); | |
197 | if (err) | |
198 | goto out1; | |
199 | err = register_filesystem(&udf_fstype); | |
200 | if (err) | |
201 | goto out; | |
202 | return 0; | |
203 | out: | |
204 | destroy_inodecache(); | |
205 | out1: | |
206 | return err; | |
207 | } | |
208 | ||
209 | static void __exit exit_udf_fs(void) | |
210 | { | |
211 | unregister_filesystem(&udf_fstype); | |
212 | destroy_inodecache(); | |
213 | } | |
214 | ||
215 | module_init(init_udf_fs) | |
216 | module_exit(exit_udf_fs) | |
217 | ||
218 | /* | |
219 | * udf_parse_options | |
220 | * | |
221 | * PURPOSE | |
222 | * Parse mount options. | |
223 | * | |
224 | * DESCRIPTION | |
225 | * The following mount options are supported: | |
226 | * | |
227 | * gid= Set the default group. | |
228 | * umask= Set the default umask. | |
229 | * uid= Set the default user. | |
230 | * bs= Set the block size. | |
231 | * unhide Show otherwise hidden files. | |
232 | * undelete Show deleted files in lists. | |
233 | * adinicb Embed data in the inode (default) | |
234 | * noadinicb Don't embed data in the inode | |
235 | * shortad Use short ad's | |
236 | * longad Use long ad's (default) | |
237 | * nostrict Unset strict conformance | |
238 | * iocharset= Set the NLS character set | |
239 | * | |
240 | * The remaining are for debugging and disaster recovery: | |
241 | * | |
242 | * novrs Skip volume sequence recognition | |
243 | * | |
244 | * The following expect a offset from 0. | |
245 | * | |
246 | * session= Set the CDROM session (default= last session) | |
247 | * anchor= Override standard anchor location. (default= 256) | |
248 | * volume= Override the VolumeDesc location. (unused) | |
249 | * partition= Override the PartitionDesc location. (unused) | |
250 | * lastblock= Set the last block of the filesystem/ | |
251 | * | |
252 | * The following expect a offset from the partition root. | |
253 | * | |
254 | * fileset= Override the fileset block location. (unused) | |
255 | * rootdir= Override the root directory location. (unused) | |
256 | * WARNING: overriding the rootdir to a non-directory may | |
257 | * yield highly unpredictable results. | |
258 | * | |
259 | * PRE-CONDITIONS | |
260 | * options Pointer to mount options string. | |
261 | * uopts Pointer to mount options variable. | |
262 | * | |
263 | * POST-CONDITIONS | |
264 | * <return> 1 Mount options parsed okay. | |
265 | * <return> 0 Error parsing mount options. | |
266 | * | |
267 | * HISTORY | |
268 | * July 1, 1997 - Andrew E. Mileski | |
269 | * Written, tested, and released. | |
270 | */ | |
271 | ||
272 | enum { | |
273 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
274 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
275 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
276 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
277 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
4d6660eb | 278 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore |
1da177e4 LT |
279 | }; |
280 | ||
281 | static match_table_t tokens = { | |
282 | {Opt_novrs, "novrs"}, | |
283 | {Opt_nostrict, "nostrict"}, | |
284 | {Opt_bs, "bs=%u"}, | |
285 | {Opt_unhide, "unhide"}, | |
286 | {Opt_undelete, "undelete"}, | |
287 | {Opt_noadinicb, "noadinicb"}, | |
288 | {Opt_adinicb, "adinicb"}, | |
289 | {Opt_shortad, "shortad"}, | |
290 | {Opt_longad, "longad"}, | |
4d6660eb PS |
291 | {Opt_uforget, "uid=forget"}, |
292 | {Opt_uignore, "uid=ignore"}, | |
293 | {Opt_gforget, "gid=forget"}, | |
294 | {Opt_gignore, "gid=ignore"}, | |
1da177e4 LT |
295 | {Opt_gid, "gid=%u"}, |
296 | {Opt_uid, "uid=%u"}, | |
297 | {Opt_umask, "umask=%o"}, | |
298 | {Opt_session, "session=%u"}, | |
299 | {Opt_lastblock, "lastblock=%u"}, | |
300 | {Opt_anchor, "anchor=%u"}, | |
301 | {Opt_volume, "volume=%u"}, | |
302 | {Opt_partition, "partition=%u"}, | |
303 | {Opt_fileset, "fileset=%u"}, | |
304 | {Opt_rootdir, "rootdir=%u"}, | |
305 | {Opt_utf8, "utf8"}, | |
306 | {Opt_iocharset, "iocharset=%s"}, | |
307 | {Opt_err, NULL} | |
308 | }; | |
309 | ||
310 | static int | |
311 | udf_parse_options(char *options, struct udf_options *uopt) | |
312 | { | |
313 | char *p; | |
314 | int option; | |
315 | ||
316 | uopt->novrs = 0; | |
317 | uopt->blocksize = 2048; | |
318 | uopt->partition = 0xFFFF; | |
319 | uopt->session = 0xFFFFFFFF; | |
320 | uopt->lastblock = 0; | |
321 | uopt->anchor = 0; | |
322 | uopt->volume = 0xFFFFFFFF; | |
323 | uopt->rootdir = 0xFFFFFFFF; | |
324 | uopt->fileset = 0xFFFFFFFF; | |
325 | uopt->nls_map = NULL; | |
326 | ||
327 | if (!options) | |
328 | return 1; | |
329 | ||
330 | while ((p = strsep(&options, ",")) != NULL) | |
331 | { | |
332 | substring_t args[MAX_OPT_ARGS]; | |
333 | int token; | |
334 | if (!*p) | |
335 | continue; | |
336 | ||
337 | token = match_token(p, tokens, args); | |
338 | switch (token) | |
339 | { | |
340 | case Opt_novrs: | |
341 | uopt->novrs = 1; | |
342 | case Opt_bs: | |
343 | if (match_int(&args[0], &option)) | |
344 | return 0; | |
345 | uopt->blocksize = option; | |
346 | break; | |
347 | case Opt_unhide: | |
348 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
349 | break; | |
350 | case Opt_undelete: | |
351 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
352 | break; | |
353 | case Opt_noadinicb: | |
354 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
355 | break; | |
356 | case Opt_adinicb: | |
357 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
358 | break; | |
359 | case Opt_shortad: | |
360 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
361 | break; | |
362 | case Opt_longad: | |
363 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
364 | break; | |
365 | case Opt_gid: | |
366 | if (match_int(args, &option)) | |
367 | return 0; | |
368 | uopt->gid = option; | |
369 | break; | |
370 | case Opt_uid: | |
371 | if (match_int(args, &option)) | |
372 | return 0; | |
373 | uopt->uid = option; | |
374 | break; | |
375 | case Opt_umask: | |
376 | if (match_octal(args, &option)) | |
377 | return 0; | |
378 | uopt->umask = option; | |
379 | break; | |
380 | case Opt_nostrict: | |
381 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
382 | break; | |
383 | case Opt_session: | |
384 | if (match_int(args, &option)) | |
385 | return 0; | |
386 | uopt->session = option; | |
387 | break; | |
388 | case Opt_lastblock: | |
389 | if (match_int(args, &option)) | |
390 | return 0; | |
391 | uopt->lastblock = option; | |
392 | break; | |
393 | case Opt_anchor: | |
394 | if (match_int(args, &option)) | |
395 | return 0; | |
396 | uopt->anchor = option; | |
397 | break; | |
398 | case Opt_volume: | |
399 | if (match_int(args, &option)) | |
400 | return 0; | |
401 | uopt->volume = option; | |
402 | break; | |
403 | case Opt_partition: | |
404 | if (match_int(args, &option)) | |
405 | return 0; | |
406 | uopt->partition = option; | |
407 | break; | |
408 | case Opt_fileset: | |
409 | if (match_int(args, &option)) | |
410 | return 0; | |
411 | uopt->fileset = option; | |
412 | break; | |
413 | case Opt_rootdir: | |
414 | if (match_int(args, &option)) | |
415 | return 0; | |
416 | uopt->rootdir = option; | |
417 | break; | |
418 | case Opt_utf8: | |
419 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
420 | break; | |
421 | #ifdef CONFIG_UDF_NLS | |
422 | case Opt_iocharset: | |
423 | uopt->nls_map = load_nls(args[0].from); | |
424 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
425 | break; | |
426 | #endif | |
4d6660eb PS |
427 | case Opt_uignore: |
428 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); | |
429 | break; | |
430 | case Opt_uforget: | |
431 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
432 | break; | |
433 | case Opt_gignore: | |
434 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); | |
435 | break; | |
436 | case Opt_gforget: | |
437 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
438 | break; | |
1da177e4 LT |
439 | default: |
440 | printk(KERN_ERR "udf: bad mount option \"%s\" " | |
441 | "or missing value\n", p); | |
442 | return 0; | |
443 | } | |
444 | } | |
445 | return 1; | |
446 | } | |
447 | ||
448 | void | |
449 | udf_write_super(struct super_block *sb) | |
450 | { | |
451 | lock_kernel(); | |
452 | if (!(sb->s_flags & MS_RDONLY)) | |
453 | udf_open_lvid(sb); | |
454 | sb->s_dirt = 0; | |
455 | unlock_kernel(); | |
456 | } | |
457 | ||
458 | static int | |
459 | udf_remount_fs(struct super_block *sb, int *flags, char *options) | |
460 | { | |
461 | struct udf_options uopt; | |
462 | ||
463 | uopt.flags = UDF_SB(sb)->s_flags ; | |
464 | uopt.uid = UDF_SB(sb)->s_uid ; | |
465 | uopt.gid = UDF_SB(sb)->s_gid ; | |
466 | uopt.umask = UDF_SB(sb)->s_umask ; | |
467 | ||
468 | if ( !udf_parse_options(options, &uopt) ) | |
469 | return -EINVAL; | |
470 | ||
471 | UDF_SB(sb)->s_flags = uopt.flags; | |
472 | UDF_SB(sb)->s_uid = uopt.uid; | |
473 | UDF_SB(sb)->s_gid = uopt.gid; | |
474 | UDF_SB(sb)->s_umask = uopt.umask; | |
475 | ||
476 | if (UDF_SB_LVIDBH(sb)) { | |
477 | int write_rev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev); | |
478 | if (write_rev > UDF_MAX_WRITE_VERSION) | |
479 | *flags |= MS_RDONLY; | |
480 | } | |
481 | ||
482 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
483 | return 0; | |
484 | if (*flags & MS_RDONLY) | |
485 | udf_close_lvid(sb); | |
486 | else | |
487 | udf_open_lvid(sb); | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
492 | /* | |
493 | * udf_set_blocksize | |
494 | * | |
495 | * PURPOSE | |
496 | * Set the block size to be used in all transfers. | |
497 | * | |
498 | * DESCRIPTION | |
499 | * To allow room for a DMA transfer, it is best to guess big when unsure. | |
500 | * This routine picks 2048 bytes as the blocksize when guessing. This | |
501 | * should be adequate until devices with larger block sizes become common. | |
502 | * | |
503 | * Note that the Linux kernel can currently only deal with blocksizes of | |
504 | * 512, 1024, 2048, 4096, and 8192 bytes. | |
505 | * | |
506 | * PRE-CONDITIONS | |
507 | * sb Pointer to _locked_ superblock. | |
508 | * | |
509 | * POST-CONDITIONS | |
510 | * sb->s_blocksize Blocksize. | |
511 | * sb->s_blocksize_bits log2 of blocksize. | |
512 | * <return> 0 Blocksize is valid. | |
513 | * <return> 1 Blocksize is invalid. | |
514 | * | |
515 | * HISTORY | |
516 | * July 1, 1997 - Andrew E. Mileski | |
517 | * Written, tested, and released. | |
518 | */ | |
519 | static int | |
520 | udf_set_blocksize(struct super_block *sb, int bsize) | |
521 | { | |
522 | if (!sb_min_blocksize(sb, bsize)) { | |
523 | udf_debug("Bad block size (%d)\n", bsize); | |
524 | printk(KERN_ERR "udf: bad block size (%d)\n", bsize); | |
525 | return 0; | |
526 | } | |
527 | return sb->s_blocksize; | |
528 | } | |
529 | ||
530 | static int | |
531 | udf_vrs(struct super_block *sb, int silent) | |
532 | { | |
533 | struct volStructDesc *vsd = NULL; | |
534 | int sector = 32768; | |
535 | int sectorsize; | |
536 | struct buffer_head *bh = NULL; | |
537 | int iso9660=0; | |
538 | int nsr02=0; | |
539 | int nsr03=0; | |
540 | ||
541 | /* Block size must be a multiple of 512 */ | |
542 | if (sb->s_blocksize & 511) | |
543 | return 0; | |
544 | ||
545 | if (sb->s_blocksize < sizeof(struct volStructDesc)) | |
546 | sectorsize = sizeof(struct volStructDesc); | |
547 | else | |
548 | sectorsize = sb->s_blocksize; | |
549 | ||
550 | sector += (UDF_SB_SESSION(sb) << sb->s_blocksize_bits); | |
551 | ||
552 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
553 | (sector >> sb->s_blocksize_bits), sb->s_blocksize); | |
554 | /* Process the sequence (if applicable) */ | |
555 | for (;!nsr02 && !nsr03; sector += sectorsize) | |
556 | { | |
557 | /* Read a block */ | |
558 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
559 | if (!bh) | |
560 | break; | |
561 | ||
562 | /* Look for ISO descriptors */ | |
563 | vsd = (struct volStructDesc *)(bh->b_data + | |
564 | (sector & (sb->s_blocksize - 1))); | |
565 | ||
566 | if (vsd->stdIdent[0] == 0) | |
567 | { | |
568 | udf_release_data(bh); | |
569 | break; | |
570 | } | |
571 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, VSD_STD_ID_LEN)) | |
572 | { | |
573 | iso9660 = sector; | |
574 | switch (vsd->structType) | |
575 | { | |
576 | case 0: | |
577 | udf_debug("ISO9660 Boot Record found\n"); | |
578 | break; | |
579 | case 1: | |
580 | udf_debug("ISO9660 Primary Volume Descriptor found\n"); | |
581 | break; | |
582 | case 2: | |
583 | udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); | |
584 | break; | |
585 | case 3: | |
586 | udf_debug("ISO9660 Volume Partition Descriptor found\n"); | |
587 | break; | |
588 | case 255: | |
589 | udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); | |
590 | break; | |
591 | default: | |
592 | udf_debug("ISO9660 VRS (%u) found\n", vsd->structType); | |
593 | break; | |
594 | } | |
595 | } | |
596 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, VSD_STD_ID_LEN)) | |
597 | { | |
598 | } | |
599 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, VSD_STD_ID_LEN)) | |
600 | { | |
601 | udf_release_data(bh); | |
602 | break; | |
603 | } | |
604 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, VSD_STD_ID_LEN)) | |
605 | { | |
606 | nsr02 = sector; | |
607 | } | |
608 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, VSD_STD_ID_LEN)) | |
609 | { | |
610 | nsr03 = sector; | |
611 | } | |
612 | udf_release_data(bh); | |
613 | } | |
614 | ||
615 | if (nsr03) | |
616 | return nsr03; | |
617 | else if (nsr02) | |
618 | return nsr02; | |
619 | else if (sector - (UDF_SB_SESSION(sb) << sb->s_blocksize_bits) == 32768) | |
620 | return -1; | |
621 | else | |
622 | return 0; | |
623 | } | |
624 | ||
625 | /* | |
626 | * udf_find_anchor | |
627 | * | |
628 | * PURPOSE | |
629 | * Find an anchor volume descriptor. | |
630 | * | |
631 | * PRE-CONDITIONS | |
632 | * sb Pointer to _locked_ superblock. | |
633 | * lastblock Last block on media. | |
634 | * | |
635 | * POST-CONDITIONS | |
636 | * <return> 1 if not found, 0 if ok | |
637 | * | |
638 | * HISTORY | |
639 | * July 1, 1997 - Andrew E. Mileski | |
640 | * Written, tested, and released. | |
641 | */ | |
642 | static void | |
643 | udf_find_anchor(struct super_block *sb) | |
644 | { | |
645 | int lastblock = UDF_SB_LASTBLOCK(sb); | |
646 | struct buffer_head *bh = NULL; | |
647 | uint16_t ident; | |
648 | uint32_t location; | |
649 | int i; | |
650 | ||
651 | if (lastblock) | |
652 | { | |
653 | int varlastblock = udf_variable_to_fixed(lastblock); | |
654 | int last[] = { lastblock, lastblock - 2, | |
655 | lastblock - 150, lastblock - 152, | |
656 | varlastblock, varlastblock - 2, | |
657 | varlastblock - 150, varlastblock - 152 }; | |
658 | ||
659 | lastblock = 0; | |
660 | ||
661 | /* Search for an anchor volume descriptor pointer */ | |
662 | ||
663 | /* according to spec, anchor is in either: | |
664 | * block 256 | |
665 | * lastblock-256 | |
666 | * lastblock | |
667 | * however, if the disc isn't closed, it could be 512 */ | |
668 | ||
e8c96f8c | 669 | for (i = 0; !lastblock && i < ARRAY_SIZE(last); i++) { |
1da177e4 LT |
670 | if (last[i] < 0 || !(bh = sb_bread(sb, last[i]))) |
671 | { | |
672 | ident = location = 0; | |
673 | } | |
674 | else | |
675 | { | |
676 | ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent); | |
677 | location = le32_to_cpu(((tag *)bh->b_data)->tagLocation); | |
678 | udf_release_data(bh); | |
679 | } | |
e8c96f8c | 680 | |
1da177e4 LT |
681 | if (ident == TAG_IDENT_AVDP) |
682 | { | |
683 | if (location == last[i] - UDF_SB_SESSION(sb)) | |
684 | { | |
685 | lastblock = UDF_SB_ANCHOR(sb)[0] = last[i] - UDF_SB_SESSION(sb); | |
686 | UDF_SB_ANCHOR(sb)[1] = last[i] - 256 - UDF_SB_SESSION(sb); | |
687 | } | |
688 | else if (location == udf_variable_to_fixed(last[i]) - UDF_SB_SESSION(sb)) | |
689 | { | |
690 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
691 | lastblock = UDF_SB_ANCHOR(sb)[0] = udf_variable_to_fixed(last[i]) - UDF_SB_SESSION(sb); | |
692 | UDF_SB_ANCHOR(sb)[1] = lastblock - 256 - UDF_SB_SESSION(sb); | |
693 | } | |
694 | else | |
695 | udf_debug("Anchor found at block %d, location mismatch %d.\n", | |
696 | last[i], location); | |
697 | } | |
698 | else if (ident == TAG_IDENT_FE || ident == TAG_IDENT_EFE) | |
699 | { | |
700 | lastblock = last[i]; | |
701 | UDF_SB_ANCHOR(sb)[3] = 512; | |
702 | } | |
703 | else | |
704 | { | |
705 | if (last[i] < 256 || !(bh = sb_bread(sb, last[i] - 256))) | |
706 | { | |
707 | ident = location = 0; | |
708 | } | |
709 | else | |
710 | { | |
711 | ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent); | |
712 | location = le32_to_cpu(((tag *)bh->b_data)->tagLocation); | |
713 | udf_release_data(bh); | |
714 | } | |
715 | ||
716 | if (ident == TAG_IDENT_AVDP && | |
717 | location == last[i] - 256 - UDF_SB_SESSION(sb)) | |
718 | { | |
719 | lastblock = last[i]; | |
720 | UDF_SB_ANCHOR(sb)[1] = last[i] - 256; | |
721 | } | |
722 | else | |
723 | { | |
724 | if (last[i] < 312 + UDF_SB_SESSION(sb) || !(bh = sb_bread(sb, last[i] - 312 - UDF_SB_SESSION(sb)))) | |
725 | { | |
726 | ident = location = 0; | |
727 | } | |
728 | else | |
729 | { | |
730 | ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent); | |
731 | location = le32_to_cpu(((tag *)bh->b_data)->tagLocation); | |
732 | udf_release_data(bh); | |
733 | } | |
734 | ||
735 | if (ident == TAG_IDENT_AVDP && | |
736 | location == udf_variable_to_fixed(last[i]) - 256) | |
737 | { | |
738 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
739 | lastblock = udf_variable_to_fixed(last[i]); | |
740 | UDF_SB_ANCHOR(sb)[1] = lastblock - 256; | |
741 | } | |
742 | } | |
743 | } | |
744 | } | |
745 | } | |
746 | ||
747 | if (!lastblock) | |
748 | { | |
749 | /* We havn't found the lastblock. check 312 */ | |
750 | if ((bh = sb_bread(sb, 312 + UDF_SB_SESSION(sb)))) | |
751 | { | |
752 | ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent); | |
753 | location = le32_to_cpu(((tag *)bh->b_data)->tagLocation); | |
754 | udf_release_data(bh); | |
755 | ||
756 | if (ident == TAG_IDENT_AVDP && location == 256) | |
757 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
758 | } | |
759 | } | |
760 | ||
e8c96f8c | 761 | for (i = 0; i < ARRAY_SIZE(UDF_SB_ANCHOR(sb)); i++) { |
1da177e4 LT |
762 | if (UDF_SB_ANCHOR(sb)[i]) |
763 | { | |
764 | if (!(bh = udf_read_tagged(sb, | |
765 | UDF_SB_ANCHOR(sb)[i], UDF_SB_ANCHOR(sb)[i], &ident))) | |
766 | { | |
767 | UDF_SB_ANCHOR(sb)[i] = 0; | |
768 | } | |
769 | else | |
770 | { | |
771 | udf_release_data(bh); | |
772 | if ((ident != TAG_IDENT_AVDP) && (i || | |
773 | (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE))) | |
774 | { | |
775 | UDF_SB_ANCHOR(sb)[i] = 0; | |
776 | } | |
777 | } | |
778 | } | |
779 | } | |
780 | ||
781 | UDF_SB_LASTBLOCK(sb) = lastblock; | |
782 | } | |
783 | ||
784 | static int | |
785 | udf_find_fileset(struct super_block *sb, kernel_lb_addr *fileset, kernel_lb_addr *root) | |
786 | { | |
787 | struct buffer_head *bh = NULL; | |
788 | long lastblock; | |
789 | uint16_t ident; | |
790 | ||
791 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
792 | fileset->partitionReferenceNum != 0xFFFF) | |
793 | { | |
794 | bh = udf_read_ptagged(sb, *fileset, 0, &ident); | |
795 | ||
796 | if (!bh) | |
797 | return 1; | |
798 | else if (ident != TAG_IDENT_FSD) | |
799 | { | |
800 | udf_release_data(bh); | |
801 | return 1; | |
802 | } | |
803 | ||
804 | } | |
805 | ||
806 | if (!bh) /* Search backwards through the partitions */ | |
807 | { | |
808 | kernel_lb_addr newfileset; | |
809 | ||
810 | return 1; | |
811 | ||
812 | for (newfileset.partitionReferenceNum=UDF_SB_NUMPARTS(sb)-1; | |
813 | (newfileset.partitionReferenceNum != 0xFFFF && | |
814 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
815 | fileset->partitionReferenceNum == 0xFFFF); | |
816 | newfileset.partitionReferenceNum--) | |
817 | { | |
818 | lastblock = UDF_SB_PARTLEN(sb, newfileset.partitionReferenceNum); | |
819 | newfileset.logicalBlockNum = 0; | |
820 | ||
821 | do | |
822 | { | |
823 | bh = udf_read_ptagged(sb, newfileset, 0, &ident); | |
824 | if (!bh) | |
825 | { | |
826 | newfileset.logicalBlockNum ++; | |
827 | continue; | |
828 | } | |
829 | ||
830 | switch (ident) | |
831 | { | |
832 | case TAG_IDENT_SBD: | |
833 | { | |
834 | struct spaceBitmapDesc *sp; | |
835 | sp = (struct spaceBitmapDesc *)bh->b_data; | |
836 | newfileset.logicalBlockNum += 1 + | |
837 | ((le32_to_cpu(sp->numOfBytes) + sizeof(struct spaceBitmapDesc) - 1) | |
838 | >> sb->s_blocksize_bits); | |
839 | udf_release_data(bh); | |
840 | break; | |
841 | } | |
842 | case TAG_IDENT_FSD: | |
843 | { | |
844 | *fileset = newfileset; | |
845 | break; | |
846 | } | |
847 | default: | |
848 | { | |
849 | newfileset.logicalBlockNum ++; | |
850 | udf_release_data(bh); | |
851 | bh = NULL; | |
852 | break; | |
853 | } | |
854 | } | |
855 | } | |
856 | while (newfileset.logicalBlockNum < lastblock && | |
857 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
858 | fileset->partitionReferenceNum == 0xFFFF); | |
859 | } | |
860 | } | |
861 | ||
862 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
863 | fileset->partitionReferenceNum != 0xFFFF) && bh) | |
864 | { | |
865 | udf_debug("Fileset at block=%d, partition=%d\n", | |
866 | fileset->logicalBlockNum, fileset->partitionReferenceNum); | |
867 | ||
868 | UDF_SB_PARTITION(sb) = fileset->partitionReferenceNum; | |
869 | udf_load_fileset(sb, bh, root); | |
870 | udf_release_data(bh); | |
871 | return 0; | |
872 | } | |
873 | return 1; | |
874 | } | |
875 | ||
876 | static void | |
877 | udf_load_pvoldesc(struct super_block *sb, struct buffer_head *bh) | |
878 | { | |
879 | struct primaryVolDesc *pvoldesc; | |
880 | time_t recording; | |
881 | long recording_usec; | |
882 | struct ustr instr; | |
883 | struct ustr outstr; | |
884 | ||
885 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
886 | ||
887 | if ( udf_stamp_to_time(&recording, &recording_usec, | |
888 | lets_to_cpu(pvoldesc->recordingDateAndTime)) ) | |
889 | { | |
890 | kernel_timestamp ts; | |
891 | ts = lets_to_cpu(pvoldesc->recordingDateAndTime); | |
892 | udf_debug("recording time %ld/%ld, %04u/%02u/%02u %02u:%02u (%x)\n", | |
893 | recording, recording_usec, | |
894 | ts.year, ts.month, ts.day, ts.hour, ts.minute, ts.typeAndTimezone); | |
895 | UDF_SB_RECORDTIME(sb).tv_sec = recording; | |
896 | UDF_SB_RECORDTIME(sb).tv_nsec = recording_usec * 1000; | |
897 | } | |
898 | ||
899 | if ( !udf_build_ustr(&instr, pvoldesc->volIdent, 32) ) | |
900 | { | |
901 | if (udf_CS0toUTF8(&outstr, &instr)) | |
902 | { | |
903 | strncpy( UDF_SB_VOLIDENT(sb), outstr.u_name, | |
904 | outstr.u_len > 31 ? 31 : outstr.u_len); | |
905 | udf_debug("volIdent[] = '%s'\n", UDF_SB_VOLIDENT(sb)); | |
906 | } | |
907 | } | |
908 | ||
909 | if ( !udf_build_ustr(&instr, pvoldesc->volSetIdent, 128) ) | |
910 | { | |
911 | if (udf_CS0toUTF8(&outstr, &instr)) | |
912 | udf_debug("volSetIdent[] = '%s'\n", outstr.u_name); | |
913 | } | |
914 | } | |
915 | ||
916 | static void | |
917 | udf_load_fileset(struct super_block *sb, struct buffer_head *bh, kernel_lb_addr *root) | |
918 | { | |
919 | struct fileSetDesc *fset; | |
920 | ||
921 | fset = (struct fileSetDesc *)bh->b_data; | |
922 | ||
923 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
924 | ||
925 | UDF_SB_SERIALNUM(sb) = le16_to_cpu(fset->descTag.tagSerialNum); | |
926 | ||
927 | udf_debug("Rootdir at block=%d, partition=%d\n", | |
928 | root->logicalBlockNum, root->partitionReferenceNum); | |
929 | } | |
930 | ||
931 | static void | |
932 | udf_load_partdesc(struct super_block *sb, struct buffer_head *bh) | |
933 | { | |
934 | struct partitionDesc *p; | |
935 | int i; | |
936 | ||
937 | p = (struct partitionDesc *)bh->b_data; | |
938 | ||
939 | for (i=0; i<UDF_SB_NUMPARTS(sb); i++) | |
940 | { | |
941 | udf_debug("Searching map: (%d == %d)\n", | |
942 | UDF_SB_PARTMAPS(sb)[i].s_partition_num, le16_to_cpu(p->partitionNumber)); | |
943 | if (UDF_SB_PARTMAPS(sb)[i].s_partition_num == le16_to_cpu(p->partitionNumber)) | |
944 | { | |
945 | UDF_SB_PARTLEN(sb,i) = le32_to_cpu(p->partitionLength); /* blocks */ | |
946 | UDF_SB_PARTROOT(sb,i) = le32_to_cpu(p->partitionStartingLocation); | |
947 | if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_READ_ONLY) | |
948 | UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_READ_ONLY; | |
949 | if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_WRITE_ONCE) | |
950 | UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_WRITE_ONCE; | |
951 | if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_REWRITABLE) | |
952 | UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_REWRITABLE; | |
953 | if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_OVERWRITABLE) | |
954 | UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_OVERWRITABLE; | |
955 | ||
956 | if (!strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) || | |
957 | !strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
958 | { | |
959 | struct partitionHeaderDesc *phd; | |
960 | ||
961 | phd = (struct partitionHeaderDesc *)(p->partitionContentsUse); | |
962 | if (phd->unallocSpaceTable.extLength) | |
963 | { | |
964 | kernel_lb_addr loc = { le32_to_cpu(phd->unallocSpaceTable.extPosition), i }; | |
965 | ||
966 | UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table = | |
967 | udf_iget(sb, loc); | |
968 | UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_TABLE; | |
969 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", | |
970 | i, UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table->i_ino); | |
971 | } | |
972 | if (phd->unallocSpaceBitmap.extLength) | |
973 | { | |
974 | UDF_SB_ALLOC_BITMAP(sb, i, s_uspace); | |
975 | if (UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap != NULL) | |
976 | { | |
977 | UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extLength = | |
978 | le32_to_cpu(phd->unallocSpaceBitmap.extLength); | |
979 | UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extPosition = | |
980 | le32_to_cpu(phd->unallocSpaceBitmap.extPosition); | |
981 | UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_BITMAP; | |
982 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", | |
983 | i, UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extPosition); | |
984 | } | |
985 | } | |
986 | if (phd->partitionIntegrityTable.extLength) | |
987 | udf_debug("partitionIntegrityTable (part %d)\n", i); | |
988 | if (phd->freedSpaceTable.extLength) | |
989 | { | |
990 | kernel_lb_addr loc = { le32_to_cpu(phd->freedSpaceTable.extPosition), i }; | |
991 | ||
992 | UDF_SB_PARTMAPS(sb)[i].s_fspace.s_table = | |
993 | udf_iget(sb, loc); | |
994 | UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_FREED_TABLE; | |
995 | udf_debug("freedSpaceTable (part %d) @ %ld\n", | |
996 | i, UDF_SB_PARTMAPS(sb)[i].s_fspace.s_table->i_ino); | |
997 | } | |
998 | if (phd->freedSpaceBitmap.extLength) | |
999 | { | |
1000 | UDF_SB_ALLOC_BITMAP(sb, i, s_fspace); | |
1001 | if (UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap != NULL) | |
1002 | { | |
1003 | UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extLength = | |
1004 | le32_to_cpu(phd->freedSpaceBitmap.extLength); | |
1005 | UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extPosition = | |
1006 | le32_to_cpu(phd->freedSpaceBitmap.extPosition); | |
1007 | UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_FREED_BITMAP; | |
1008 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", | |
1009 | i, UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extPosition); | |
1010 | } | |
1011 | } | |
1012 | } | |
1013 | break; | |
1014 | } | |
1015 | } | |
1016 | if (i == UDF_SB_NUMPARTS(sb)) | |
1017 | { | |
1018 | udf_debug("Partition (%d) not found in partition map\n", le16_to_cpu(p->partitionNumber)); | |
1019 | } | |
1020 | else | |
1021 | { | |
1022 | udf_debug("Partition (%d:%d type %x) starts at physical %d, block length %d\n", | |
1023 | le16_to_cpu(p->partitionNumber), i, UDF_SB_PARTTYPE(sb,i), | |
1024 | UDF_SB_PARTROOT(sb,i), UDF_SB_PARTLEN(sb,i)); | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | static int | |
1029 | udf_load_logicalvol(struct super_block *sb, struct buffer_head * bh, kernel_lb_addr *fileset) | |
1030 | { | |
1031 | struct logicalVolDesc *lvd; | |
1032 | int i, j, offset; | |
1033 | uint8_t type; | |
1034 | ||
1035 | lvd = (struct logicalVolDesc *)bh->b_data; | |
1036 | ||
1037 | UDF_SB_ALLOC_PARTMAPS(sb, le32_to_cpu(lvd->numPartitionMaps)); | |
1038 | ||
1039 | for (i=0,offset=0; | |
1040 | i<UDF_SB_NUMPARTS(sb) && offset<le32_to_cpu(lvd->mapTableLength); | |
1041 | i++,offset+=((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapLength) | |
1042 | { | |
1043 | type = ((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapType; | |
1044 | if (type == 1) | |
1045 | { | |
1046 | struct genericPartitionMap1 *gpm1 = (struct genericPartitionMap1 *)&(lvd->partitionMaps[offset]); | |
1047 | UDF_SB_PARTTYPE(sb,i) = UDF_TYPE1_MAP15; | |
1048 | UDF_SB_PARTVSN(sb,i) = le16_to_cpu(gpm1->volSeqNum); | |
1049 | UDF_SB_PARTNUM(sb,i) = le16_to_cpu(gpm1->partitionNum); | |
1050 | UDF_SB_PARTFUNC(sb,i) = NULL; | |
1051 | } | |
1052 | else if (type == 2) | |
1053 | { | |
1054 | struct udfPartitionMap2 *upm2 = (struct udfPartitionMap2 *)&(lvd->partitionMaps[offset]); | |
1055 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, strlen(UDF_ID_VIRTUAL))) | |
1056 | { | |
1057 | if (le16_to_cpu(((__le16 *)upm2->partIdent.identSuffix)[0]) == 0x0150) | |
1058 | { | |
1059 | UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP15; | |
1060 | UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt15; | |
1061 | } | |
1062 | else if (le16_to_cpu(((__le16 *)upm2->partIdent.identSuffix)[0]) == 0x0200) | |
1063 | { | |
1064 | UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP20; | |
1065 | UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt20; | |
1066 | } | |
1067 | } | |
1068 | else if (!strncmp(upm2->partIdent.ident, UDF_ID_SPARABLE, strlen(UDF_ID_SPARABLE))) | |
1069 | { | |
1070 | uint32_t loc; | |
1071 | uint16_t ident; | |
1072 | struct sparingTable *st; | |
1073 | struct sparablePartitionMap *spm = (struct sparablePartitionMap *)&(lvd->partitionMaps[offset]); | |
1074 | ||
1075 | UDF_SB_PARTTYPE(sb,i) = UDF_SPARABLE_MAP15; | |
1076 | UDF_SB_TYPESPAR(sb,i).s_packet_len = le16_to_cpu(spm->packetLength); | |
1077 | for (j=0; j<spm->numSparingTables; j++) | |
1078 | { | |
1079 | loc = le32_to_cpu(spm->locSparingTable[j]); | |
1080 | UDF_SB_TYPESPAR(sb,i).s_spar_map[j] = | |
1081 | udf_read_tagged(sb, loc, loc, &ident); | |
1082 | if (UDF_SB_TYPESPAR(sb,i).s_spar_map[j] != NULL) | |
1083 | { | |
1084 | st = (struct sparingTable *)UDF_SB_TYPESPAR(sb,i).s_spar_map[j]->b_data; | |
1085 | if (ident != 0 || | |
1086 | strncmp(st->sparingIdent.ident, UDF_ID_SPARING, strlen(UDF_ID_SPARING))) | |
1087 | { | |
1088 | udf_release_data(UDF_SB_TYPESPAR(sb,i).s_spar_map[j]); | |
1089 | UDF_SB_TYPESPAR(sb,i).s_spar_map[j] = NULL; | |
1090 | } | |
1091 | } | |
1092 | } | |
1093 | UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_spar15; | |
1094 | } | |
1095 | else | |
1096 | { | |
1097 | udf_debug("Unknown ident: %s\n", upm2->partIdent.ident); | |
1098 | continue; | |
1099 | } | |
1100 | UDF_SB_PARTVSN(sb,i) = le16_to_cpu(upm2->volSeqNum); | |
1101 | UDF_SB_PARTNUM(sb,i) = le16_to_cpu(upm2->partitionNum); | |
1102 | } | |
1103 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
1104 | i, UDF_SB_PARTNUM(sb,i), type, UDF_SB_PARTVSN(sb,i)); | |
1105 | } | |
1106 | ||
1107 | if (fileset) | |
1108 | { | |
1109 | long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]); | |
1110 | ||
1111 | *fileset = lelb_to_cpu(la->extLocation); | |
1112 | udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n", | |
1113 | fileset->logicalBlockNum, | |
1114 | fileset->partitionReferenceNum); | |
1115 | } | |
1116 | if (lvd->integritySeqExt.extLength) | |
1117 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
1118 | return 0; | |
1119 | } | |
1120 | ||
1121 | /* | |
1122 | * udf_load_logicalvolint | |
1123 | * | |
1124 | */ | |
1125 | static void | |
1126 | udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc) | |
1127 | { | |
1128 | struct buffer_head *bh = NULL; | |
1129 | uint16_t ident; | |
1130 | ||
1131 | while (loc.extLength > 0 && | |
1132 | (bh = udf_read_tagged(sb, loc.extLocation, | |
1133 | loc.extLocation, &ident)) && | |
1134 | ident == TAG_IDENT_LVID) | |
1135 | { | |
1136 | UDF_SB_LVIDBH(sb) = bh; | |
1137 | ||
1138 | if (UDF_SB_LVID(sb)->nextIntegrityExt.extLength) | |
1139 | udf_load_logicalvolint(sb, leea_to_cpu(UDF_SB_LVID(sb)->nextIntegrityExt)); | |
1140 | ||
1141 | if (UDF_SB_LVIDBH(sb) != bh) | |
1142 | udf_release_data(bh); | |
1143 | loc.extLength -= sb->s_blocksize; | |
1144 | loc.extLocation ++; | |
1145 | } | |
1146 | if (UDF_SB_LVIDBH(sb) != bh) | |
1147 | udf_release_data(bh); | |
1148 | } | |
1149 | ||
1150 | /* | |
1151 | * udf_process_sequence | |
1152 | * | |
1153 | * PURPOSE | |
1154 | * Process a main/reserve volume descriptor sequence. | |
1155 | * | |
1156 | * PRE-CONDITIONS | |
1157 | * sb Pointer to _locked_ superblock. | |
1158 | * block First block of first extent of the sequence. | |
1159 | * lastblock Lastblock of first extent of the sequence. | |
1160 | * | |
1161 | * HISTORY | |
1162 | * July 1, 1997 - Andrew E. Mileski | |
1163 | * Written, tested, and released. | |
1164 | */ | |
1165 | static int | |
1166 | udf_process_sequence(struct super_block *sb, long block, long lastblock, kernel_lb_addr *fileset) | |
1167 | { | |
1168 | struct buffer_head *bh = NULL; | |
1169 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
1170 | struct generic_desc *gd; | |
1171 | struct volDescPtr *vdp; | |
1172 | int done=0; | |
1173 | int i,j; | |
1174 | uint32_t vdsn; | |
1175 | uint16_t ident; | |
1176 | long next_s = 0, next_e = 0; | |
1177 | ||
1178 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1179 | ||
1180 | /* Read the main descriptor sequence */ | |
1181 | for (;(!done && block <= lastblock); block++) | |
1182 | { | |
1183 | ||
1184 | bh = udf_read_tagged(sb, block, block, &ident); | |
1185 | if (!bh) | |
1186 | break; | |
1187 | ||
1188 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1189 | gd = (struct generic_desc *)bh->b_data; | |
1190 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
1191 | switch (ident) | |
1192 | { | |
1193 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ | |
1194 | if (vdsn >= vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum) | |
1195 | { | |
1196 | vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum = vdsn; | |
1197 | vds[VDS_POS_PRIMARY_VOL_DESC].block = block; | |
1198 | } | |
1199 | break; | |
1200 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ | |
1201 | if (vdsn >= vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum) | |
1202 | { | |
1203 | vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum = vdsn; | |
1204 | vds[VDS_POS_VOL_DESC_PTR].block = block; | |
1205 | ||
1206 | vdp = (struct volDescPtr *)bh->b_data; | |
1207 | next_s = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation); | |
1208 | next_e = le32_to_cpu(vdp->nextVolDescSeqExt.extLength); | |
1209 | next_e = next_e >> sb->s_blocksize_bits; | |
1210 | next_e += next_s; | |
1211 | } | |
1212 | break; | |
1213 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ | |
1214 | if (vdsn >= vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum) | |
1215 | { | |
1216 | vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum = vdsn; | |
1217 | vds[VDS_POS_IMP_USE_VOL_DESC].block = block; | |
1218 | } | |
1219 | break; | |
1220 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ | |
1221 | if (!vds[VDS_POS_PARTITION_DESC].block) | |
1222 | vds[VDS_POS_PARTITION_DESC].block = block; | |
1223 | break; | |
1224 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ | |
1225 | if (vdsn >= vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum) | |
1226 | { | |
1227 | vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum = vdsn; | |
1228 | vds[VDS_POS_LOGICAL_VOL_DESC].block = block; | |
1229 | } | |
1230 | break; | |
1231 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ | |
1232 | if (vdsn >= vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum) | |
1233 | { | |
1234 | vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum = vdsn; | |
1235 | vds[VDS_POS_UNALLOC_SPACE_DESC].block = block; | |
1236 | } | |
1237 | break; | |
1238 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ | |
1239 | vds[VDS_POS_TERMINATING_DESC].block = block; | |
1240 | if (next_e) | |
1241 | { | |
1242 | block = next_s; | |
1243 | lastblock = next_e; | |
1244 | next_s = next_e = 0; | |
1245 | } | |
1246 | else | |
1247 | done = 1; | |
1248 | break; | |
1249 | } | |
1250 | udf_release_data(bh); | |
1251 | } | |
1252 | for (i=0; i<VDS_POS_LENGTH; i++) | |
1253 | { | |
1254 | if (vds[i].block) | |
1255 | { | |
1256 | bh = udf_read_tagged(sb, vds[i].block, vds[i].block, &ident); | |
1257 | ||
1258 | if (i == VDS_POS_PRIMARY_VOL_DESC) | |
1259 | udf_load_pvoldesc(sb, bh); | |
1260 | else if (i == VDS_POS_LOGICAL_VOL_DESC) | |
1261 | udf_load_logicalvol(sb, bh, fileset); | |
1262 | else if (i == VDS_POS_PARTITION_DESC) | |
1263 | { | |
1264 | struct buffer_head *bh2 = NULL; | |
1265 | udf_load_partdesc(sb, bh); | |
1266 | for (j=vds[i].block+1; j<vds[VDS_POS_TERMINATING_DESC].block; j++) | |
1267 | { | |
1268 | bh2 = udf_read_tagged(sb, j, j, &ident); | |
1269 | gd = (struct generic_desc *)bh2->b_data; | |
1270 | if (ident == TAG_IDENT_PD) | |
1271 | udf_load_partdesc(sb, bh2); | |
1272 | udf_release_data(bh2); | |
1273 | } | |
1274 | } | |
1275 | udf_release_data(bh); | |
1276 | } | |
1277 | } | |
1278 | ||
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | /* | |
1283 | * udf_check_valid() | |
1284 | */ | |
1285 | static int | |
1286 | udf_check_valid(struct super_block *sb, int novrs, int silent) | |
1287 | { | |
1288 | long block; | |
1289 | ||
1290 | if (novrs) | |
1291 | { | |
1292 | udf_debug("Validity check skipped because of novrs option\n"); | |
1293 | return 0; | |
1294 | } | |
1295 | /* Check that it is NSR02 compliant */ | |
1296 | /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
1297 | else if ((block = udf_vrs(sb, silent)) == -1) | |
1298 | { | |
1299 | udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n"); | |
1300 | if (!UDF_SB_LASTBLOCK(sb)) | |
1301 | UDF_SB_LASTBLOCK(sb) = udf_get_last_block(sb); | |
1302 | return 0; | |
1303 | } | |
1304 | else | |
1305 | return !block; | |
1306 | } | |
1307 | ||
1308 | static int | |
1309 | udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset) | |
1310 | { | |
1311 | struct anchorVolDescPtr *anchor; | |
1312 | uint16_t ident; | |
1313 | struct buffer_head *bh; | |
1314 | long main_s, main_e, reserve_s, reserve_e; | |
1315 | int i, j; | |
1316 | ||
1317 | if (!sb) | |
1318 | return 1; | |
1319 | ||
e8c96f8c | 1320 | for (i = 0; i < ARRAY_SIZE(UDF_SB_ANCHOR(sb)); i++) { |
1da177e4 LT |
1321 | if (UDF_SB_ANCHOR(sb)[i] && (bh = udf_read_tagged(sb, |
1322 | UDF_SB_ANCHOR(sb)[i], UDF_SB_ANCHOR(sb)[i], &ident))) | |
1323 | { | |
1324 | anchor = (struct anchorVolDescPtr *)bh->b_data; | |
1325 | ||
1326 | /* Locate the main sequence */ | |
1327 | main_s = le32_to_cpu( anchor->mainVolDescSeqExt.extLocation ); | |
1328 | main_e = le32_to_cpu( anchor->mainVolDescSeqExt.extLength ); | |
1329 | main_e = main_e >> sb->s_blocksize_bits; | |
1330 | main_e += main_s; | |
e8c96f8c | 1331 | |
1da177e4 LT |
1332 | /* Locate the reserve sequence */ |
1333 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); | |
1334 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); | |
1335 | reserve_e = reserve_e >> sb->s_blocksize_bits; | |
1336 | reserve_e += reserve_s; | |
1337 | ||
1338 | udf_release_data(bh); | |
1339 | ||
1340 | /* Process the main & reserve sequences */ | |
1341 | /* responsible for finding the PartitionDesc(s) */ | |
1342 | if (!(udf_process_sequence(sb, main_s, main_e, fileset) && | |
1343 | udf_process_sequence(sb, reserve_s, reserve_e, fileset))) | |
1344 | { | |
1345 | break; | |
1346 | } | |
1347 | } | |
1348 | } | |
1349 | ||
e8c96f8c | 1350 | if (i == ARRAY_SIZE(UDF_SB_ANCHOR(sb))) { |
1da177e4 LT |
1351 | udf_debug("No Anchor block found\n"); |
1352 | return 1; | |
e8c96f8c | 1353 | } else |
1da177e4 LT |
1354 | udf_debug("Using anchor in block %d\n", UDF_SB_ANCHOR(sb)[i]); |
1355 | ||
1356 | for (i=0; i<UDF_SB_NUMPARTS(sb); i++) | |
1357 | { | |
1358 | switch UDF_SB_PARTTYPE(sb, i) | |
1359 | { | |
1360 | case UDF_VIRTUAL_MAP15: | |
1361 | case UDF_VIRTUAL_MAP20: | |
1362 | { | |
1363 | kernel_lb_addr ino; | |
1364 | ||
1365 | if (!UDF_SB_LASTBLOCK(sb)) | |
1366 | { | |
1367 | UDF_SB_LASTBLOCK(sb) = udf_get_last_block(sb); | |
1368 | udf_find_anchor(sb); | |
1369 | } | |
1370 | ||
1371 | if (!UDF_SB_LASTBLOCK(sb)) | |
1372 | { | |
1373 | udf_debug("Unable to determine Lastblock (For Virtual Partition)\n"); | |
1374 | return 1; | |
1375 | } | |
1376 | ||
1377 | for (j=0; j<UDF_SB_NUMPARTS(sb); j++) | |
1378 | { | |
1379 | if (j != i && | |
1380 | UDF_SB_PARTVSN(sb,i) == UDF_SB_PARTVSN(sb,j) && | |
1381 | UDF_SB_PARTNUM(sb,i) == UDF_SB_PARTNUM(sb,j)) | |
1382 | { | |
1383 | ino.partitionReferenceNum = j; | |
1384 | ino.logicalBlockNum = UDF_SB_LASTBLOCK(sb) - | |
1385 | UDF_SB_PARTROOT(sb,j); | |
1386 | break; | |
1387 | } | |
1388 | } | |
1389 | ||
1390 | if (j == UDF_SB_NUMPARTS(sb)) | |
1391 | return 1; | |
1392 | ||
1393 | if (!(UDF_SB_VAT(sb) = udf_iget(sb, ino))) | |
1394 | return 1; | |
1395 | ||
1396 | if (UDF_SB_PARTTYPE(sb,i) == UDF_VIRTUAL_MAP15) | |
1397 | { | |
1398 | UDF_SB_TYPEVIRT(sb,i).s_start_offset = udf_ext0_offset(UDF_SB_VAT(sb)); | |
1399 | UDF_SB_TYPEVIRT(sb,i).s_num_entries = (UDF_SB_VAT(sb)->i_size - 36) >> 2; | |
1400 | } | |
1401 | else if (UDF_SB_PARTTYPE(sb,i) == UDF_VIRTUAL_MAP20) | |
1402 | { | |
1403 | struct buffer_head *bh = NULL; | |
1404 | uint32_t pos; | |
1405 | ||
1406 | pos = udf_block_map(UDF_SB_VAT(sb), 0); | |
1407 | bh = sb_bread(sb, pos); | |
1408 | UDF_SB_TYPEVIRT(sb,i).s_start_offset = | |
1409 | le16_to_cpu(((struct virtualAllocationTable20 *)bh->b_data + udf_ext0_offset(UDF_SB_VAT(sb)))->lengthHeader) + | |
1410 | udf_ext0_offset(UDF_SB_VAT(sb)); | |
1411 | UDF_SB_TYPEVIRT(sb,i).s_num_entries = (UDF_SB_VAT(sb)->i_size - | |
1412 | UDF_SB_TYPEVIRT(sb,i).s_start_offset) >> 2; | |
1413 | udf_release_data(bh); | |
1414 | } | |
1415 | UDF_SB_PARTROOT(sb,i) = udf_get_pblock(sb, 0, i, 0); | |
1416 | UDF_SB_PARTLEN(sb,i) = UDF_SB_PARTLEN(sb,ino.partitionReferenceNum); | |
1417 | } | |
1418 | } | |
1419 | } | |
1420 | return 0; | |
1421 | } | |
1422 | ||
1423 | static void udf_open_lvid(struct super_block *sb) | |
1424 | { | |
1425 | if (UDF_SB_LVIDBH(sb)) | |
1426 | { | |
1427 | int i; | |
1428 | kernel_timestamp cpu_time; | |
1429 | ||
1430 | UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1431 | UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1432 | if (udf_time_to_stamp(&cpu_time, CURRENT_TIME)) | |
1433 | UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time); | |
1434 | UDF_SB_LVID(sb)->integrityType = LVID_INTEGRITY_TYPE_OPEN; | |
1435 | ||
1436 | UDF_SB_LVID(sb)->descTag.descCRC = | |
1437 | cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag), | |
1438 | le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0)); | |
1439 | ||
1440 | UDF_SB_LVID(sb)->descTag.tagChecksum = 0; | |
1441 | for (i=0; i<16; i++) | |
1442 | if (i != 4) | |
1443 | UDF_SB_LVID(sb)->descTag.tagChecksum += | |
1444 | ((uint8_t *)&(UDF_SB_LVID(sb)->descTag))[i]; | |
1445 | ||
1446 | mark_buffer_dirty(UDF_SB_LVIDBH(sb)); | |
1447 | } | |
1448 | } | |
1449 | ||
1450 | static void udf_close_lvid(struct super_block *sb) | |
1451 | { | |
1452 | if (UDF_SB_LVIDBH(sb) && | |
1453 | UDF_SB_LVID(sb)->integrityType == LVID_INTEGRITY_TYPE_OPEN) | |
1454 | { | |
1455 | int i; | |
1456 | kernel_timestamp cpu_time; | |
1457 | ||
1458 | UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1459 | UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1460 | if (udf_time_to_stamp(&cpu_time, CURRENT_TIME)) | |
1461 | UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time); | |
1462 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev)) | |
1463 | UDF_SB_LVIDIU(sb)->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
1464 | if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev)) | |
1465 | UDF_SB_LVIDIU(sb)->minUDFReadRev = cpu_to_le16(UDF_SB_UDFREV(sb)); | |
1466 | if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev)) | |
1467 | UDF_SB_LVIDIU(sb)->minUDFWriteRev = cpu_to_le16(UDF_SB_UDFREV(sb)); | |
1468 | UDF_SB_LVID(sb)->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
1469 | ||
1470 | UDF_SB_LVID(sb)->descTag.descCRC = | |
1471 | cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag), | |
1472 | le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0)); | |
1473 | ||
1474 | UDF_SB_LVID(sb)->descTag.tagChecksum = 0; | |
1475 | for (i=0; i<16; i++) | |
1476 | if (i != 4) | |
1477 | UDF_SB_LVID(sb)->descTag.tagChecksum += | |
1478 | ((uint8_t *)&(UDF_SB_LVID(sb)->descTag))[i]; | |
1479 | ||
1480 | mark_buffer_dirty(UDF_SB_LVIDBH(sb)); | |
1481 | } | |
1482 | } | |
1483 | ||
1484 | /* | |
1485 | * udf_read_super | |
1486 | * | |
1487 | * PURPOSE | |
1488 | * Complete the specified super block. | |
1489 | * | |
1490 | * PRE-CONDITIONS | |
1491 | * sb Pointer to superblock to complete - never NULL. | |
1492 | * sb->s_dev Device to read suberblock from. | |
1493 | * options Pointer to mount options. | |
1494 | * silent Silent flag. | |
1495 | * | |
1496 | * HISTORY | |
1497 | * July 1, 1997 - Andrew E. Mileski | |
1498 | * Written, tested, and released. | |
1499 | */ | |
1500 | static int udf_fill_super(struct super_block *sb, void *options, int silent) | |
1501 | { | |
1502 | int i; | |
1503 | struct inode *inode=NULL; | |
1504 | struct udf_options uopt; | |
1505 | kernel_lb_addr rootdir, fileset; | |
1506 | struct udf_sb_info *sbi; | |
1507 | ||
1508 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
1509 | uopt.uid = -1; | |
1510 | uopt.gid = -1; | |
1511 | uopt.umask = 0; | |
1512 | ||
1513 | sbi = kmalloc(sizeof(struct udf_sb_info), GFP_KERNEL); | |
1514 | if (!sbi) | |
1515 | return -ENOMEM; | |
1516 | sb->s_fs_info = sbi; | |
1517 | memset(UDF_SB(sb), 0x00, sizeof(struct udf_sb_info)); | |
1518 | ||
1e7933de | 1519 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 LT |
1520 | |
1521 | if (!udf_parse_options((char *)options, &uopt)) | |
1522 | goto error_out; | |
1523 | ||
1524 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
1525 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) | |
1526 | { | |
1527 | udf_error(sb, "udf_read_super", | |
1528 | "utf8 cannot be combined with iocharset\n"); | |
1529 | goto error_out; | |
1530 | } | |
1531 | #ifdef CONFIG_UDF_NLS | |
1532 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) | |
1533 | { | |
1534 | uopt.nls_map = load_nls_default(); | |
1535 | if (!uopt.nls_map) | |
1536 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
1537 | else | |
1538 | udf_debug("Using default NLS map\n"); | |
1539 | } | |
1540 | #endif | |
1541 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
1542 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
1543 | ||
1544 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
1545 | fileset.partitionReferenceNum = 0xFFFF; | |
1546 | ||
1547 | UDF_SB(sb)->s_flags = uopt.flags; | |
1548 | UDF_SB(sb)->s_uid = uopt.uid; | |
1549 | UDF_SB(sb)->s_gid = uopt.gid; | |
1550 | UDF_SB(sb)->s_umask = uopt.umask; | |
1551 | UDF_SB(sb)->s_nls_map = uopt.nls_map; | |
1552 | ||
1553 | /* Set the block size for all transfers */ | |
1554 | if (!udf_set_blocksize(sb, uopt.blocksize)) | |
1555 | goto error_out; | |
1556 | ||
1557 | if ( uopt.session == 0xFFFFFFFF ) | |
1558 | UDF_SB_SESSION(sb) = udf_get_last_session(sb); | |
1559 | else | |
1560 | UDF_SB_SESSION(sb) = uopt.session; | |
1561 | ||
1562 | udf_debug("Multi-session=%d\n", UDF_SB_SESSION(sb)); | |
1563 | ||
1564 | UDF_SB_LASTBLOCK(sb) = uopt.lastblock; | |
1565 | UDF_SB_ANCHOR(sb)[0] = UDF_SB_ANCHOR(sb)[1] = 0; | |
1566 | UDF_SB_ANCHOR(sb)[2] = uopt.anchor; | |
1567 | UDF_SB_ANCHOR(sb)[3] = 256; | |
1568 | ||
1569 | if (udf_check_valid(sb, uopt.novrs, silent)) /* read volume recognition sequences */ | |
1570 | { | |
1571 | printk("UDF-fs: No VRS found\n"); | |
1572 | goto error_out; | |
1573 | } | |
1574 | ||
1575 | udf_find_anchor(sb); | |
1576 | ||
1577 | /* Fill in the rest of the superblock */ | |
1578 | sb->s_op = &udf_sb_ops; | |
1579 | sb->dq_op = NULL; | |
1580 | sb->s_dirt = 0; | |
1581 | sb->s_magic = UDF_SUPER_MAGIC; | |
1582 | sb->s_time_gran = 1000; | |
1583 | ||
1584 | if (udf_load_partition(sb, &fileset)) | |
1585 | { | |
1586 | printk("UDF-fs: No partition found (1)\n"); | |
1587 | goto error_out; | |
1588 | } | |
1589 | ||
1590 | udf_debug("Lastblock=%d\n", UDF_SB_LASTBLOCK(sb)); | |
1591 | ||
1592 | if ( UDF_SB_LVIDBH(sb) ) | |
1593 | { | |
1594 | uint16_t minUDFReadRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev); | |
1595 | uint16_t minUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev); | |
1596 | /* uint16_t maxUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev); */ | |
1597 | ||
1598 | if (minUDFReadRev > UDF_MAX_READ_VERSION) | |
1599 | { | |
1600 | printk("UDF-fs: minUDFReadRev=%x (max is %x)\n", | |
1601 | le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev), | |
1602 | UDF_MAX_READ_VERSION); | |
1603 | goto error_out; | |
1604 | } | |
1605 | else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) | |
1606 | { | |
1607 | sb->s_flags |= MS_RDONLY; | |
1608 | } | |
1609 | ||
1610 | UDF_SB_UDFREV(sb) = minUDFWriteRev; | |
1611 | ||
1612 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
1613 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
1614 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
1615 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
1616 | } | |
1617 | ||
1618 | if ( !UDF_SB_NUMPARTS(sb) ) | |
1619 | { | |
1620 | printk("UDF-fs: No partition found (2)\n"); | |
1621 | goto error_out; | |
1622 | } | |
1623 | ||
c1a26e7d | 1624 | if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_READ_ONLY) { |
39b3f6d6 ES |
1625 | printk("UDF-fs: Partition marked readonly; forcing readonly mount\n"); |
1626 | sb->s_flags |= MS_RDONLY; | |
c1a26e7d | 1627 | } |
39b3f6d6 | 1628 | |
1da177e4 LT |
1629 | if ( udf_find_fileset(sb, &fileset, &rootdir) ) |
1630 | { | |
1631 | printk("UDF-fs: No fileset found\n"); | |
1632 | goto error_out; | |
1633 | } | |
1634 | ||
1635 | if (!silent) | |
1636 | { | |
1637 | kernel_timestamp ts; | |
1638 | udf_time_to_stamp(&ts, UDF_SB_RECORDTIME(sb)); | |
1639 | udf_info("UDF %s (%s) Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", | |
1640 | UDFFS_VERSION, UDFFS_DATE, | |
1641 | UDF_SB_VOLIDENT(sb), ts.year, ts.month, ts.day, ts.hour, ts.minute, | |
1642 | ts.typeAndTimezone); | |
1643 | } | |
1644 | if (!(sb->s_flags & MS_RDONLY)) | |
1645 | udf_open_lvid(sb); | |
1646 | ||
1647 | /* Assign the root inode */ | |
1648 | /* assign inodes by physical block number */ | |
1649 | /* perhaps it's not extensible enough, but for now ... */ | |
1650 | inode = udf_iget(sb, rootdir); | |
1651 | if (!inode) | |
1652 | { | |
1653 | printk("UDF-fs: Error in udf_iget, block=%d, partition=%d\n", | |
1654 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); | |
1655 | goto error_out; | |
1656 | } | |
1657 | ||
1658 | /* Allocate a dentry for the root inode */ | |
1659 | sb->s_root = d_alloc_root(inode); | |
1660 | if (!sb->s_root) | |
1661 | { | |
1662 | printk("UDF-fs: Couldn't allocate root dentry\n"); | |
1663 | iput(inode); | |
1664 | goto error_out; | |
1665 | } | |
00a2b0f6 | 1666 | sb->s_maxbytes = 1<<30; |
1da177e4 LT |
1667 | return 0; |
1668 | ||
1669 | error_out: | |
1670 | if (UDF_SB_VAT(sb)) | |
1671 | iput(UDF_SB_VAT(sb)); | |
1672 | if (UDF_SB_NUMPARTS(sb)) | |
1673 | { | |
1674 | if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE) | |
1675 | iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table); | |
1676 | if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE) | |
1677 | iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table); | |
1678 | if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP) | |
1679 | UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace); | |
1680 | if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP) | |
1681 | UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace); | |
1682 | if (UDF_SB_PARTTYPE(sb, UDF_SB_PARTITION(sb)) == UDF_SPARABLE_MAP15) | |
1683 | { | |
1684 | for (i=0; i<4; i++) | |
1685 | udf_release_data(UDF_SB_TYPESPAR(sb, UDF_SB_PARTITION(sb)).s_spar_map[i]); | |
1686 | } | |
1687 | } | |
1688 | #ifdef CONFIG_UDF_NLS | |
1689 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
1690 | unload_nls(UDF_SB(sb)->s_nls_map); | |
1691 | #endif | |
1692 | if (!(sb->s_flags & MS_RDONLY)) | |
1693 | udf_close_lvid(sb); | |
1694 | udf_release_data(UDF_SB_LVIDBH(sb)); | |
1695 | UDF_SB_FREE(sb); | |
1696 | kfree(sbi); | |
1697 | sb->s_fs_info = NULL; | |
1698 | return -EINVAL; | |
1699 | } | |
1700 | ||
1701 | void udf_error(struct super_block *sb, const char *function, | |
1702 | const char *fmt, ...) | |
1703 | { | |
1704 | va_list args; | |
1705 | ||
1706 | if (!(sb->s_flags & MS_RDONLY)) | |
1707 | { | |
1708 | /* mark sb error */ | |
1709 | sb->s_dirt = 1; | |
1710 | } | |
1711 | va_start(args, fmt); | |
4a6e617a | 1712 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 LT |
1713 | va_end(args); |
1714 | printk (KERN_CRIT "UDF-fs error (device %s): %s: %s\n", | |
1715 | sb->s_id, function, error_buf); | |
1716 | } | |
1717 | ||
1718 | void udf_warning(struct super_block *sb, const char *function, | |
1719 | const char *fmt, ...) | |
1720 | { | |
1721 | va_list args; | |
1722 | ||
1723 | va_start (args, fmt); | |
4a6e617a | 1724 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 LT |
1725 | va_end(args); |
1726 | printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n", | |
1727 | sb->s_id, function, error_buf); | |
1728 | } | |
1729 | ||
1730 | /* | |
1731 | * udf_put_super | |
1732 | * | |
1733 | * PURPOSE | |
1734 | * Prepare for destruction of the superblock. | |
1735 | * | |
1736 | * DESCRIPTION | |
1737 | * Called before the filesystem is unmounted. | |
1738 | * | |
1739 | * HISTORY | |
1740 | * July 1, 1997 - Andrew E. Mileski | |
1741 | * Written, tested, and released. | |
1742 | */ | |
1743 | static void | |
1744 | udf_put_super(struct super_block *sb) | |
1745 | { | |
1746 | int i; | |
1747 | ||
1748 | if (UDF_SB_VAT(sb)) | |
1749 | iput(UDF_SB_VAT(sb)); | |
1750 | if (UDF_SB_NUMPARTS(sb)) | |
1751 | { | |
1752 | if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE) | |
1753 | iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table); | |
1754 | if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE) | |
1755 | iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table); | |
1756 | if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP) | |
1757 | UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace); | |
1758 | if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP) | |
1759 | UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace); | |
1760 | if (UDF_SB_PARTTYPE(sb, UDF_SB_PARTITION(sb)) == UDF_SPARABLE_MAP15) | |
1761 | { | |
1762 | for (i=0; i<4; i++) | |
1763 | udf_release_data(UDF_SB_TYPESPAR(sb, UDF_SB_PARTITION(sb)).s_spar_map[i]); | |
1764 | } | |
1765 | } | |
1766 | #ifdef CONFIG_UDF_NLS | |
1767 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
1768 | unload_nls(UDF_SB(sb)->s_nls_map); | |
1769 | #endif | |
1770 | if (!(sb->s_flags & MS_RDONLY)) | |
1771 | udf_close_lvid(sb); | |
1772 | udf_release_data(UDF_SB_LVIDBH(sb)); | |
1773 | UDF_SB_FREE(sb); | |
1774 | kfree(sb->s_fs_info); | |
1775 | sb->s_fs_info = NULL; | |
1776 | } | |
1777 | ||
1778 | /* | |
1779 | * udf_stat_fs | |
1780 | * | |
1781 | * PURPOSE | |
1782 | * Return info about the filesystem. | |
1783 | * | |
1784 | * DESCRIPTION | |
1785 | * Called by sys_statfs() | |
1786 | * | |
1787 | * HISTORY | |
1788 | * July 1, 1997 - Andrew E. Mileski | |
1789 | * Written, tested, and released. | |
1790 | */ | |
1791 | static int | |
726c3342 | 1792 | udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 1793 | { |
726c3342 DH |
1794 | struct super_block *sb = dentry->d_sb; |
1795 | ||
1da177e4 LT |
1796 | buf->f_type = UDF_SUPER_MAGIC; |
1797 | buf->f_bsize = sb->s_blocksize; | |
1798 | buf->f_blocks = UDF_SB_PARTLEN(sb, UDF_SB_PARTITION(sb)); | |
1799 | buf->f_bfree = udf_count_free(sb); | |
1800 | buf->f_bavail = buf->f_bfree; | |
1801 | buf->f_files = (UDF_SB_LVIDBH(sb) ? | |
1802 | (le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) + | |
1803 | le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs)) : 0) + buf->f_bfree; | |
1804 | buf->f_ffree = buf->f_bfree; | |
1805 | /* __kernel_fsid_t f_fsid */ | |
1806 | buf->f_namelen = UDF_NAME_LEN-2; | |
1807 | ||
1808 | return 0; | |
1809 | } | |
1810 | ||
1811 | static unsigned char udf_bitmap_lookup[16] = { | |
1812 | 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4 | |
1813 | }; | |
1814 | ||
1815 | static unsigned int | |
1816 | udf_count_free_bitmap(struct super_block *sb, struct udf_bitmap *bitmap) | |
1817 | { | |
1818 | struct buffer_head *bh = NULL; | |
1819 | unsigned int accum = 0; | |
1820 | int index; | |
1821 | int block = 0, newblock; | |
1822 | kernel_lb_addr loc; | |
1823 | uint32_t bytes; | |
1824 | uint8_t value; | |
1825 | uint8_t *ptr; | |
1826 | uint16_t ident; | |
1827 | struct spaceBitmapDesc *bm; | |
1828 | ||
1829 | lock_kernel(); | |
1830 | ||
1831 | loc.logicalBlockNum = bitmap->s_extPosition; | |
1832 | loc.partitionReferenceNum = UDF_SB_PARTITION(sb); | |
1833 | bh = udf_read_ptagged(sb, loc, 0, &ident); | |
1834 | ||
1835 | if (!bh) | |
1836 | { | |
1837 | printk(KERN_ERR "udf: udf_count_free failed\n"); | |
1838 | goto out; | |
1839 | } | |
1840 | else if (ident != TAG_IDENT_SBD) | |
1841 | { | |
1842 | udf_release_data(bh); | |
1843 | printk(KERN_ERR "udf: udf_count_free failed\n"); | |
1844 | goto out; | |
1845 | } | |
1846 | ||
1847 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
1848 | bytes = le32_to_cpu(bm->numOfBytes); | |
1849 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ | |
1850 | ptr = (uint8_t *)bh->b_data; | |
1851 | ||
1852 | while ( bytes > 0 ) | |
1853 | { | |
1854 | while ((bytes > 0) && (index < sb->s_blocksize)) | |
1855 | { | |
1856 | value = ptr[index]; | |
1857 | accum += udf_bitmap_lookup[ value & 0x0f ]; | |
1858 | accum += udf_bitmap_lookup[ value >> 4 ]; | |
1859 | index++; | |
1860 | bytes--; | |
1861 | } | |
1862 | if ( bytes ) | |
1863 | { | |
1864 | udf_release_data(bh); | |
1865 | newblock = udf_get_lb_pblock(sb, loc, ++block); | |
1866 | bh = udf_tread(sb, newblock); | |
1867 | if (!bh) | |
1868 | { | |
1869 | udf_debug("read failed\n"); | |
1870 | goto out; | |
1871 | } | |
1872 | index = 0; | |
1873 | ptr = (uint8_t *)bh->b_data; | |
1874 | } | |
1875 | } | |
1876 | udf_release_data(bh); | |
1877 | ||
1878 | out: | |
1879 | unlock_kernel(); | |
1880 | ||
1881 | return accum; | |
1882 | } | |
1883 | ||
1884 | static unsigned int | |
1885 | udf_count_free_table(struct super_block *sb, struct inode * table) | |
1886 | { | |
1887 | unsigned int accum = 0; | |
1888 | uint32_t extoffset, elen; | |
1889 | kernel_lb_addr bloc, eloc; | |
1890 | int8_t etype; | |
1891 | struct buffer_head *bh = NULL; | |
1892 | ||
1893 | lock_kernel(); | |
1894 | ||
1895 | bloc = UDF_I_LOCATION(table); | |
1896 | extoffset = sizeof(struct unallocSpaceEntry); | |
1897 | ||
1898 | while ((etype = udf_next_aext(table, &bloc, &extoffset, &eloc, &elen, &bh, 1)) != -1) | |
1899 | { | |
1900 | accum += (elen >> table->i_sb->s_blocksize_bits); | |
1901 | } | |
1902 | udf_release_data(bh); | |
1903 | ||
1904 | unlock_kernel(); | |
1905 | ||
1906 | return accum; | |
1907 | } | |
1908 | ||
1909 | static unsigned int | |
1910 | udf_count_free(struct super_block *sb) | |
1911 | { | |
1912 | unsigned int accum = 0; | |
1913 | ||
1914 | if (UDF_SB_LVIDBH(sb)) | |
1915 | { | |
1916 | if (le32_to_cpu(UDF_SB_LVID(sb)->numOfPartitions) > UDF_SB_PARTITION(sb)) | |
1917 | { | |
1918 | accum = le32_to_cpu(UDF_SB_LVID(sb)->freeSpaceTable[UDF_SB_PARTITION(sb)]); | |
1919 | ||
1920 | if (accum == 0xFFFFFFFF) | |
1921 | accum = 0; | |
1922 | } | |
1923 | } | |
1924 | ||
1925 | if (accum) | |
1926 | return accum; | |
1927 | ||
1928 | if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP) | |
1929 | { | |
1930 | accum += udf_count_free_bitmap(sb, | |
1931 | UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_bitmap); | |
1932 | } | |
1933 | if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP) | |
1934 | { | |
1935 | accum += udf_count_free_bitmap(sb, | |
1936 | UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_bitmap); | |
1937 | } | |
1938 | if (accum) | |
1939 | return accum; | |
1940 | ||
1941 | if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE) | |
1942 | { | |
1943 | accum += udf_count_free_table(sb, | |
1944 | UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table); | |
1945 | } | |
1946 | if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE) | |
1947 | { | |
1948 | accum += udf_count_free_table(sb, | |
1949 | UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table); | |
1950 | } | |
1951 | ||
1952 | return accum; | |
1953 | } |