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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 | * | |
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 | |
37 | * vol descs. 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 | ||
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 <linux/errno.h> | |
56 | #include <linux/mount.h> | |
57 | #include <linux/seq_file.h> | |
58 | #include <linux/bitmap.h> | |
59 | #include <linux/crc-itu-t.h> | |
60 | #include <asm/byteorder.h> | |
61 | ||
62 | #include "udf_sb.h" | |
63 | #include "udf_i.h" | |
64 | ||
65 | #include <linux/init.h> | |
66 | #include <asm/uaccess.h> | |
67 | ||
68 | #define VDS_POS_PRIMARY_VOL_DESC 0 | |
69 | #define VDS_POS_UNALLOC_SPACE_DESC 1 | |
70 | #define VDS_POS_LOGICAL_VOL_DESC 2 | |
71 | #define VDS_POS_PARTITION_DESC 3 | |
72 | #define VDS_POS_IMP_USE_VOL_DESC 4 | |
73 | #define VDS_POS_VOL_DESC_PTR 5 | |
74 | #define VDS_POS_TERMINATING_DESC 6 | |
75 | #define VDS_POS_LENGTH 7 | |
76 | ||
77 | #define UDF_DEFAULT_BLOCKSIZE 2048 | |
78 | ||
79 | static char error_buf[1024]; | |
80 | ||
81 | /* These are the "meat" - everything else is stuffing */ | |
82 | static int udf_fill_super(struct super_block *, void *, int); | |
83 | static void udf_put_super(struct super_block *); | |
84 | static int udf_sync_fs(struct super_block *, int); | |
85 | static int udf_remount_fs(struct super_block *, int *, char *); | |
86 | static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); | |
87 | static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, | |
88 | struct kernel_lb_addr *); | |
89 | static void udf_load_fileset(struct super_block *, struct buffer_head *, | |
90 | struct kernel_lb_addr *); | |
91 | static void udf_open_lvid(struct super_block *); | |
92 | static void udf_close_lvid(struct super_block *); | |
93 | static unsigned int udf_count_free(struct super_block *); | |
94 | static int udf_statfs(struct dentry *, struct kstatfs *); | |
95 | static int udf_show_options(struct seq_file *, struct vfsmount *); | |
96 | static void udf_error(struct super_block *sb, const char *function, | |
97 | const char *fmt, ...); | |
98 | ||
99 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) | |
100 | { | |
101 | struct logicalVolIntegrityDesc *lvid = | |
102 | (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; | |
103 | __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); | |
104 | __u32 offset = number_of_partitions * 2 * | |
105 | sizeof(uint32_t)/sizeof(uint8_t); | |
106 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); | |
107 | } | |
108 | ||
109 | /* UDF filesystem type */ | |
110 | static int udf_get_sb(struct file_system_type *fs_type, | |
111 | int flags, const char *dev_name, void *data, | |
112 | struct vfsmount *mnt) | |
113 | { | |
114 | return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt); | |
115 | } | |
116 | ||
117 | static struct file_system_type udf_fstype = { | |
118 | .owner = THIS_MODULE, | |
119 | .name = "udf", | |
120 | .get_sb = udf_get_sb, | |
121 | .kill_sb = kill_block_super, | |
122 | .fs_flags = FS_REQUIRES_DEV, | |
123 | }; | |
124 | ||
125 | static struct kmem_cache *udf_inode_cachep; | |
126 | ||
127 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
128 | { | |
129 | struct udf_inode_info *ei; | |
130 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); | |
131 | if (!ei) | |
132 | return NULL; | |
133 | ||
134 | ei->i_unique = 0; | |
135 | ei->i_lenExtents = 0; | |
136 | ei->i_next_alloc_block = 0; | |
137 | ei->i_next_alloc_goal = 0; | |
138 | ei->i_strat4096 = 0; | |
139 | ||
140 | return &ei->vfs_inode; | |
141 | } | |
142 | ||
143 | static void udf_destroy_inode(struct inode *inode) | |
144 | { | |
145 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); | |
146 | } | |
147 | ||
148 | static void init_once(void *foo) | |
149 | { | |
150 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; | |
151 | ||
152 | ei->i_ext.i_data = NULL; | |
153 | inode_init_once(&ei->vfs_inode); | |
154 | } | |
155 | ||
156 | static int init_inodecache(void) | |
157 | { | |
158 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
159 | sizeof(struct udf_inode_info), | |
160 | 0, (SLAB_RECLAIM_ACCOUNT | | |
161 | SLAB_MEM_SPREAD), | |
162 | init_once); | |
163 | if (!udf_inode_cachep) | |
164 | return -ENOMEM; | |
165 | return 0; | |
166 | } | |
167 | ||
168 | static void destroy_inodecache(void) | |
169 | { | |
170 | kmem_cache_destroy(udf_inode_cachep); | |
171 | } | |
172 | ||
173 | /* Superblock operations */ | |
174 | static const struct super_operations udf_sb_ops = { | |
175 | .alloc_inode = udf_alloc_inode, | |
176 | .destroy_inode = udf_destroy_inode, | |
177 | .write_inode = udf_write_inode, | |
178 | .delete_inode = udf_delete_inode, | |
179 | .clear_inode = udf_clear_inode, | |
180 | .put_super = udf_put_super, | |
181 | .sync_fs = udf_sync_fs, | |
182 | .statfs = udf_statfs, | |
183 | .remount_fs = udf_remount_fs, | |
184 | .show_options = udf_show_options, | |
185 | }; | |
186 | ||
187 | struct udf_options { | |
188 | unsigned char novrs; | |
189 | unsigned int blocksize; | |
190 | unsigned int session; | |
191 | unsigned int lastblock; | |
192 | unsigned int anchor; | |
193 | unsigned int volume; | |
194 | unsigned short partition; | |
195 | unsigned int fileset; | |
196 | unsigned int rootdir; | |
197 | unsigned int flags; | |
198 | mode_t umask; | |
199 | gid_t gid; | |
200 | uid_t uid; | |
201 | mode_t fmode; | |
202 | mode_t dmode; | |
203 | struct nls_table *nls_map; | |
204 | }; | |
205 | ||
206 | static int __init init_udf_fs(void) | |
207 | { | |
208 | int err; | |
209 | ||
210 | err = init_inodecache(); | |
211 | if (err) | |
212 | goto out1; | |
213 | err = register_filesystem(&udf_fstype); | |
214 | if (err) | |
215 | goto out; | |
216 | ||
217 | return 0; | |
218 | ||
219 | out: | |
220 | destroy_inodecache(); | |
221 | ||
222 | out1: | |
223 | return err; | |
224 | } | |
225 | ||
226 | static void __exit exit_udf_fs(void) | |
227 | { | |
228 | unregister_filesystem(&udf_fstype); | |
229 | destroy_inodecache(); | |
230 | } | |
231 | ||
232 | module_init(init_udf_fs) | |
233 | module_exit(exit_udf_fs) | |
234 | ||
235 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) | |
236 | { | |
237 | struct udf_sb_info *sbi = UDF_SB(sb); | |
238 | ||
239 | sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), | |
240 | GFP_KERNEL); | |
241 | if (!sbi->s_partmaps) { | |
242 | udf_error(sb, __func__, | |
243 | "Unable to allocate space for %d partition maps", | |
244 | count); | |
245 | sbi->s_partitions = 0; | |
246 | return -ENOMEM; | |
247 | } | |
248 | ||
249 | sbi->s_partitions = count; | |
250 | return 0; | |
251 | } | |
252 | ||
253 | static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt) | |
254 | { | |
255 | struct super_block *sb = mnt->mnt_sb; | |
256 | struct udf_sb_info *sbi = UDF_SB(sb); | |
257 | ||
258 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
259 | seq_puts(seq, ",nostrict"); | |
260 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) | |
261 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); | |
262 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
263 | seq_puts(seq, ",unhide"); | |
264 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
265 | seq_puts(seq, ",undelete"); | |
266 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
267 | seq_puts(seq, ",noadinicb"); | |
268 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
269 | seq_puts(seq, ",shortad"); | |
270 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
271 | seq_puts(seq, ",uid=forget"); | |
272 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) | |
273 | seq_puts(seq, ",uid=ignore"); | |
274 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) | |
275 | seq_puts(seq, ",gid=forget"); | |
276 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) | |
277 | seq_puts(seq, ",gid=ignore"); | |
278 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) | |
279 | seq_printf(seq, ",uid=%u", sbi->s_uid); | |
280 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) | |
281 | seq_printf(seq, ",gid=%u", sbi->s_gid); | |
282 | if (sbi->s_umask != 0) | |
283 | seq_printf(seq, ",umask=%o", sbi->s_umask); | |
284 | if (sbi->s_fmode != UDF_INVALID_MODE) | |
285 | seq_printf(seq, ",mode=%o", sbi->s_fmode); | |
286 | if (sbi->s_dmode != UDF_INVALID_MODE) | |
287 | seq_printf(seq, ",dmode=%o", sbi->s_dmode); | |
288 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) | |
289 | seq_printf(seq, ",session=%u", sbi->s_session); | |
290 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) | |
291 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
292 | if (sbi->s_anchor != 0) | |
293 | seq_printf(seq, ",anchor=%u", sbi->s_anchor); | |
294 | /* | |
295 | * volume, partition, fileset and rootdir seem to be ignored | |
296 | * currently | |
297 | */ | |
298 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) | |
299 | seq_puts(seq, ",utf8"); | |
300 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
301 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
306 | /* | |
307 | * udf_parse_options | |
308 | * | |
309 | * PURPOSE | |
310 | * Parse mount options. | |
311 | * | |
312 | * DESCRIPTION | |
313 | * The following mount options are supported: | |
314 | * | |
315 | * gid= Set the default group. | |
316 | * umask= Set the default umask. | |
317 | * mode= Set the default file permissions. | |
318 | * dmode= Set the default directory permissions. | |
319 | * uid= Set the default user. | |
320 | * bs= Set the block size. | |
321 | * unhide Show otherwise hidden files. | |
322 | * undelete Show deleted files in lists. | |
323 | * adinicb Embed data in the inode (default) | |
324 | * noadinicb Don't embed data in the inode | |
325 | * shortad Use short ad's | |
326 | * longad Use long ad's (default) | |
327 | * nostrict Unset strict conformance | |
328 | * iocharset= Set the NLS character set | |
329 | * | |
330 | * The remaining are for debugging and disaster recovery: | |
331 | * | |
332 | * novrs Skip volume sequence recognition | |
333 | * | |
334 | * The following expect a offset from 0. | |
335 | * | |
336 | * session= Set the CDROM session (default= last session) | |
337 | * anchor= Override standard anchor location. (default= 256) | |
338 | * volume= Override the VolumeDesc location. (unused) | |
339 | * partition= Override the PartitionDesc location. (unused) | |
340 | * lastblock= Set the last block of the filesystem/ | |
341 | * | |
342 | * The following expect a offset from the partition root. | |
343 | * | |
344 | * fileset= Override the fileset block location. (unused) | |
345 | * rootdir= Override the root directory location. (unused) | |
346 | * WARNING: overriding the rootdir to a non-directory may | |
347 | * yield highly unpredictable results. | |
348 | * | |
349 | * PRE-CONDITIONS | |
350 | * options Pointer to mount options string. | |
351 | * uopts Pointer to mount options variable. | |
352 | * | |
353 | * POST-CONDITIONS | |
354 | * <return> 1 Mount options parsed okay. | |
355 | * <return> 0 Error parsing mount options. | |
356 | * | |
357 | * HISTORY | |
358 | * July 1, 1997 - Andrew E. Mileski | |
359 | * Written, tested, and released. | |
360 | */ | |
361 | ||
362 | enum { | |
363 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
364 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
365 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
366 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
367 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
368 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, | |
369 | Opt_fmode, Opt_dmode | |
370 | }; | |
371 | ||
372 | static const match_table_t tokens = { | |
373 | {Opt_novrs, "novrs"}, | |
374 | {Opt_nostrict, "nostrict"}, | |
375 | {Opt_bs, "bs=%u"}, | |
376 | {Opt_unhide, "unhide"}, | |
377 | {Opt_undelete, "undelete"}, | |
378 | {Opt_noadinicb, "noadinicb"}, | |
379 | {Opt_adinicb, "adinicb"}, | |
380 | {Opt_shortad, "shortad"}, | |
381 | {Opt_longad, "longad"}, | |
382 | {Opt_uforget, "uid=forget"}, | |
383 | {Opt_uignore, "uid=ignore"}, | |
384 | {Opt_gforget, "gid=forget"}, | |
385 | {Opt_gignore, "gid=ignore"}, | |
386 | {Opt_gid, "gid=%u"}, | |
387 | {Opt_uid, "uid=%u"}, | |
388 | {Opt_umask, "umask=%o"}, | |
389 | {Opt_session, "session=%u"}, | |
390 | {Opt_lastblock, "lastblock=%u"}, | |
391 | {Opt_anchor, "anchor=%u"}, | |
392 | {Opt_volume, "volume=%u"}, | |
393 | {Opt_partition, "partition=%u"}, | |
394 | {Opt_fileset, "fileset=%u"}, | |
395 | {Opt_rootdir, "rootdir=%u"}, | |
396 | {Opt_utf8, "utf8"}, | |
397 | {Opt_iocharset, "iocharset=%s"}, | |
398 | {Opt_fmode, "mode=%o"}, | |
399 | {Opt_dmode, "dmode=%o"}, | |
400 | {Opt_err, NULL} | |
401 | }; | |
402 | ||
403 | static int udf_parse_options(char *options, struct udf_options *uopt, | |
404 | bool remount) | |
405 | { | |
406 | char *p; | |
407 | int option; | |
408 | ||
409 | uopt->novrs = 0; | |
410 | uopt->partition = 0xFFFF; | |
411 | uopt->session = 0xFFFFFFFF; | |
412 | uopt->lastblock = 0; | |
413 | uopt->anchor = 0; | |
414 | uopt->volume = 0xFFFFFFFF; | |
415 | uopt->rootdir = 0xFFFFFFFF; | |
416 | uopt->fileset = 0xFFFFFFFF; | |
417 | uopt->nls_map = NULL; | |
418 | ||
419 | if (!options) | |
420 | return 1; | |
421 | ||
422 | while ((p = strsep(&options, ",")) != NULL) { | |
423 | substring_t args[MAX_OPT_ARGS]; | |
424 | int token; | |
425 | if (!*p) | |
426 | continue; | |
427 | ||
428 | token = match_token(p, tokens, args); | |
429 | switch (token) { | |
430 | case Opt_novrs: | |
431 | uopt->novrs = 1; | |
432 | break; | |
433 | case Opt_bs: | |
434 | if (match_int(&args[0], &option)) | |
435 | return 0; | |
436 | uopt->blocksize = option; | |
437 | uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); | |
438 | break; | |
439 | case Opt_unhide: | |
440 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
441 | break; | |
442 | case Opt_undelete: | |
443 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
444 | break; | |
445 | case Opt_noadinicb: | |
446 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
447 | break; | |
448 | case Opt_adinicb: | |
449 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
450 | break; | |
451 | case Opt_shortad: | |
452 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
453 | break; | |
454 | case Opt_longad: | |
455 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
456 | break; | |
457 | case Opt_gid: | |
458 | if (match_int(args, &option)) | |
459 | return 0; | |
460 | uopt->gid = option; | |
461 | uopt->flags |= (1 << UDF_FLAG_GID_SET); | |
462 | break; | |
463 | case Opt_uid: | |
464 | if (match_int(args, &option)) | |
465 | return 0; | |
466 | uopt->uid = option; | |
467 | uopt->flags |= (1 << UDF_FLAG_UID_SET); | |
468 | break; | |
469 | case Opt_umask: | |
470 | if (match_octal(args, &option)) | |
471 | return 0; | |
472 | uopt->umask = option; | |
473 | break; | |
474 | case Opt_nostrict: | |
475 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
476 | break; | |
477 | case Opt_session: | |
478 | if (match_int(args, &option)) | |
479 | return 0; | |
480 | uopt->session = option; | |
481 | if (!remount) | |
482 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
483 | break; | |
484 | case Opt_lastblock: | |
485 | if (match_int(args, &option)) | |
486 | return 0; | |
487 | uopt->lastblock = option; | |
488 | if (!remount) | |
489 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
490 | break; | |
491 | case Opt_anchor: | |
492 | if (match_int(args, &option)) | |
493 | return 0; | |
494 | uopt->anchor = option; | |
495 | break; | |
496 | case Opt_volume: | |
497 | if (match_int(args, &option)) | |
498 | return 0; | |
499 | uopt->volume = option; | |
500 | break; | |
501 | case Opt_partition: | |
502 | if (match_int(args, &option)) | |
503 | return 0; | |
504 | uopt->partition = option; | |
505 | break; | |
506 | case Opt_fileset: | |
507 | if (match_int(args, &option)) | |
508 | return 0; | |
509 | uopt->fileset = option; | |
510 | break; | |
511 | case Opt_rootdir: | |
512 | if (match_int(args, &option)) | |
513 | return 0; | |
514 | uopt->rootdir = option; | |
515 | break; | |
516 | case Opt_utf8: | |
517 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
518 | break; | |
519 | #ifdef CONFIG_UDF_NLS | |
520 | case Opt_iocharset: | |
521 | uopt->nls_map = load_nls(args[0].from); | |
522 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
523 | break; | |
524 | #endif | |
525 | case Opt_uignore: | |
526 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); | |
527 | break; | |
528 | case Opt_uforget: | |
529 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
530 | break; | |
531 | case Opt_gignore: | |
532 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); | |
533 | break; | |
534 | case Opt_gforget: | |
535 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
536 | break; | |
537 | case Opt_fmode: | |
538 | if (match_octal(args, &option)) | |
539 | return 0; | |
540 | uopt->fmode = option & 0777; | |
541 | break; | |
542 | case Opt_dmode: | |
543 | if (match_octal(args, &option)) | |
544 | return 0; | |
545 | uopt->dmode = option & 0777; | |
546 | break; | |
547 | default: | |
548 | printk(KERN_ERR "udf: bad mount option \"%s\" " | |
549 | "or missing value\n", p); | |
550 | return 0; | |
551 | } | |
552 | } | |
553 | return 1; | |
554 | } | |
555 | ||
556 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) | |
557 | { | |
558 | struct udf_options uopt; | |
559 | struct udf_sb_info *sbi = UDF_SB(sb); | |
560 | ||
561 | uopt.flags = sbi->s_flags; | |
562 | uopt.uid = sbi->s_uid; | |
563 | uopt.gid = sbi->s_gid; | |
564 | uopt.umask = sbi->s_umask; | |
565 | uopt.fmode = sbi->s_fmode; | |
566 | uopt.dmode = sbi->s_dmode; | |
567 | ||
568 | if (!udf_parse_options(options, &uopt, true)) | |
569 | return -EINVAL; | |
570 | ||
571 | sbi->s_flags = uopt.flags; | |
572 | sbi->s_uid = uopt.uid; | |
573 | sbi->s_gid = uopt.gid; | |
574 | sbi->s_umask = uopt.umask; | |
575 | sbi->s_fmode = uopt.fmode; | |
576 | sbi->s_dmode = uopt.dmode; | |
577 | ||
578 | if (sbi->s_lvid_bh) { | |
579 | int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); | |
580 | if (write_rev > UDF_MAX_WRITE_VERSION) | |
581 | *flags |= MS_RDONLY; | |
582 | } | |
583 | ||
584 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
585 | return 0; | |
586 | if (*flags & MS_RDONLY) | |
587 | udf_close_lvid(sb); | |
588 | else | |
589 | udf_open_lvid(sb); | |
590 | ||
591 | return 0; | |
592 | } | |
593 | ||
594 | /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ | |
595 | /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
596 | static loff_t udf_check_vsd(struct super_block *sb) | |
597 | { | |
598 | struct volStructDesc *vsd = NULL; | |
599 | loff_t sector = 32768; | |
600 | int sectorsize; | |
601 | struct buffer_head *bh = NULL; | |
602 | int nsr02 = 0; | |
603 | int nsr03 = 0; | |
604 | struct udf_sb_info *sbi; | |
605 | ||
606 | sbi = UDF_SB(sb); | |
607 | if (sb->s_blocksize < sizeof(struct volStructDesc)) | |
608 | sectorsize = sizeof(struct volStructDesc); | |
609 | else | |
610 | sectorsize = sb->s_blocksize; | |
611 | ||
612 | sector += (sbi->s_session << sb->s_blocksize_bits); | |
613 | ||
614 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
615 | (unsigned int)(sector >> sb->s_blocksize_bits), | |
616 | sb->s_blocksize); | |
617 | /* Process the sequence (if applicable) */ | |
618 | for (; !nsr02 && !nsr03; sector += sectorsize) { | |
619 | /* Read a block */ | |
620 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
621 | if (!bh) | |
622 | break; | |
623 | ||
624 | /* Look for ISO descriptors */ | |
625 | vsd = (struct volStructDesc *)(bh->b_data + | |
626 | (sector & (sb->s_blocksize - 1))); | |
627 | ||
628 | if (vsd->stdIdent[0] == 0) { | |
629 | brelse(bh); | |
630 | break; | |
631 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, | |
632 | VSD_STD_ID_LEN)) { | |
633 | switch (vsd->structType) { | |
634 | case 0: | |
635 | udf_debug("ISO9660 Boot Record found\n"); | |
636 | break; | |
637 | case 1: | |
638 | udf_debug("ISO9660 Primary Volume Descriptor " | |
639 | "found\n"); | |
640 | break; | |
641 | case 2: | |
642 | udf_debug("ISO9660 Supplementary Volume " | |
643 | "Descriptor found\n"); | |
644 | break; | |
645 | case 3: | |
646 | udf_debug("ISO9660 Volume Partition Descriptor " | |
647 | "found\n"); | |
648 | break; | |
649 | case 255: | |
650 | udf_debug("ISO9660 Volume Descriptor Set " | |
651 | "Terminator found\n"); | |
652 | break; | |
653 | default: | |
654 | udf_debug("ISO9660 VRS (%u) found\n", | |
655 | vsd->structType); | |
656 | break; | |
657 | } | |
658 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, | |
659 | VSD_STD_ID_LEN)) | |
660 | ; /* nothing */ | |
661 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
662 | VSD_STD_ID_LEN)) { | |
663 | brelse(bh); | |
664 | break; | |
665 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, | |
666 | VSD_STD_ID_LEN)) | |
667 | nsr02 = sector; | |
668 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, | |
669 | VSD_STD_ID_LEN)) | |
670 | nsr03 = sector; | |
671 | brelse(bh); | |
672 | } | |
673 | ||
674 | if (nsr03) | |
675 | return nsr03; | |
676 | else if (nsr02) | |
677 | return nsr02; | |
678 | else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) | |
679 | return -1; | |
680 | else | |
681 | return 0; | |
682 | } | |
683 | ||
684 | static int udf_find_fileset(struct super_block *sb, | |
685 | struct kernel_lb_addr *fileset, | |
686 | struct kernel_lb_addr *root) | |
687 | { | |
688 | struct buffer_head *bh = NULL; | |
689 | long lastblock; | |
690 | uint16_t ident; | |
691 | struct udf_sb_info *sbi; | |
692 | ||
693 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
694 | fileset->partitionReferenceNum != 0xFFFF) { | |
695 | bh = udf_read_ptagged(sb, fileset, 0, &ident); | |
696 | ||
697 | if (!bh) { | |
698 | return 1; | |
699 | } else if (ident != TAG_IDENT_FSD) { | |
700 | brelse(bh); | |
701 | return 1; | |
702 | } | |
703 | ||
704 | } | |
705 | ||
706 | sbi = UDF_SB(sb); | |
707 | if (!bh) { | |
708 | /* Search backwards through the partitions */ | |
709 | struct kernel_lb_addr newfileset; | |
710 | ||
711 | /* --> cvg: FIXME - is it reasonable? */ | |
712 | return 1; | |
713 | ||
714 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; | |
715 | (newfileset.partitionReferenceNum != 0xFFFF && | |
716 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
717 | fileset->partitionReferenceNum == 0xFFFF); | |
718 | newfileset.partitionReferenceNum--) { | |
719 | lastblock = sbi->s_partmaps | |
720 | [newfileset.partitionReferenceNum] | |
721 | .s_partition_len; | |
722 | newfileset.logicalBlockNum = 0; | |
723 | ||
724 | do { | |
725 | bh = udf_read_ptagged(sb, &newfileset, 0, | |
726 | &ident); | |
727 | if (!bh) { | |
728 | newfileset.logicalBlockNum++; | |
729 | continue; | |
730 | } | |
731 | ||
732 | switch (ident) { | |
733 | case TAG_IDENT_SBD: | |
734 | { | |
735 | struct spaceBitmapDesc *sp; | |
736 | sp = (struct spaceBitmapDesc *) | |
737 | bh->b_data; | |
738 | newfileset.logicalBlockNum += 1 + | |
739 | ((le32_to_cpu(sp->numOfBytes) + | |
740 | sizeof(struct spaceBitmapDesc) | |
741 | - 1) >> sb->s_blocksize_bits); | |
742 | brelse(bh); | |
743 | break; | |
744 | } | |
745 | case TAG_IDENT_FSD: | |
746 | *fileset = newfileset; | |
747 | break; | |
748 | default: | |
749 | newfileset.logicalBlockNum++; | |
750 | brelse(bh); | |
751 | bh = NULL; | |
752 | break; | |
753 | } | |
754 | } while (newfileset.logicalBlockNum < lastblock && | |
755 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
756 | fileset->partitionReferenceNum == 0xFFFF); | |
757 | } | |
758 | } | |
759 | ||
760 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
761 | fileset->partitionReferenceNum != 0xFFFF) && bh) { | |
762 | udf_debug("Fileset at block=%d, partition=%d\n", | |
763 | fileset->logicalBlockNum, | |
764 | fileset->partitionReferenceNum); | |
765 | ||
766 | sbi->s_partition = fileset->partitionReferenceNum; | |
767 | udf_load_fileset(sb, bh, root); | |
768 | brelse(bh); | |
769 | return 0; | |
770 | } | |
771 | return 1; | |
772 | } | |
773 | ||
774 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) | |
775 | { | |
776 | struct primaryVolDesc *pvoldesc; | |
777 | struct ustr *instr, *outstr; | |
778 | struct buffer_head *bh; | |
779 | uint16_t ident; | |
780 | int ret = 1; | |
781 | ||
782 | instr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
783 | if (!instr) | |
784 | return 1; | |
785 | ||
786 | outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
787 | if (!outstr) | |
788 | goto out1; | |
789 | ||
790 | bh = udf_read_tagged(sb, block, block, &ident); | |
791 | if (!bh) | |
792 | goto out2; | |
793 | ||
794 | BUG_ON(ident != TAG_IDENT_PVD); | |
795 | ||
796 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
797 | ||
798 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, | |
799 | pvoldesc->recordingDateAndTime)) { | |
800 | #ifdef UDFFS_DEBUG | |
801 | struct timestamp *ts = &pvoldesc->recordingDateAndTime; | |
802 | udf_debug("recording time %04u/%02u/%02u" | |
803 | " %02u:%02u (%x)\n", | |
804 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, | |
805 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
806 | #endif | |
807 | } | |
808 | ||
809 | if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) | |
810 | if (udf_CS0toUTF8(outstr, instr)) { | |
811 | strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, | |
812 | outstr->u_len > 31 ? 31 : outstr->u_len); | |
813 | udf_debug("volIdent[] = '%s'\n", | |
814 | UDF_SB(sb)->s_volume_ident); | |
815 | } | |
816 | ||
817 | if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) | |
818 | if (udf_CS0toUTF8(outstr, instr)) | |
819 | udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); | |
820 | ||
821 | brelse(bh); | |
822 | ret = 0; | |
823 | out2: | |
824 | kfree(outstr); | |
825 | out1: | |
826 | kfree(instr); | |
827 | return ret; | |
828 | } | |
829 | ||
830 | static int udf_load_metadata_files(struct super_block *sb, int partition) | |
831 | { | |
832 | struct udf_sb_info *sbi = UDF_SB(sb); | |
833 | struct udf_part_map *map; | |
834 | struct udf_meta_data *mdata; | |
835 | struct kernel_lb_addr addr; | |
836 | int fe_error = 0; | |
837 | ||
838 | map = &sbi->s_partmaps[partition]; | |
839 | mdata = &map->s_type_specific.s_metadata; | |
840 | ||
841 | /* metadata address */ | |
842 | addr.logicalBlockNum = mdata->s_meta_file_loc; | |
843 | addr.partitionReferenceNum = map->s_partition_num; | |
844 | ||
845 | udf_debug("Metadata file location: block = %d part = %d\n", | |
846 | addr.logicalBlockNum, addr.partitionReferenceNum); | |
847 | ||
848 | mdata->s_metadata_fe = udf_iget(sb, &addr); | |
849 | ||
850 | if (mdata->s_metadata_fe == NULL) { | |
851 | udf_warning(sb, __func__, "metadata inode efe not found, " | |
852 | "will try mirror inode."); | |
853 | fe_error = 1; | |
854 | } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type != | |
855 | ICBTAG_FLAG_AD_SHORT) { | |
856 | udf_warning(sb, __func__, "metadata inode efe does not have " | |
857 | "short allocation descriptors!"); | |
858 | fe_error = 1; | |
859 | iput(mdata->s_metadata_fe); | |
860 | mdata->s_metadata_fe = NULL; | |
861 | } | |
862 | ||
863 | /* mirror file entry */ | |
864 | addr.logicalBlockNum = mdata->s_mirror_file_loc; | |
865 | addr.partitionReferenceNum = map->s_partition_num; | |
866 | ||
867 | udf_debug("Mirror metadata file location: block = %d part = %d\n", | |
868 | addr.logicalBlockNum, addr.partitionReferenceNum); | |
869 | ||
870 | mdata->s_mirror_fe = udf_iget(sb, &addr); | |
871 | ||
872 | if (mdata->s_mirror_fe == NULL) { | |
873 | if (fe_error) { | |
874 | udf_error(sb, __func__, "mirror inode efe not found " | |
875 | "and metadata inode is missing too, exiting..."); | |
876 | goto error_exit; | |
877 | } else | |
878 | udf_warning(sb, __func__, "mirror inode efe not found," | |
879 | " but metadata inode is OK"); | |
880 | } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type != | |
881 | ICBTAG_FLAG_AD_SHORT) { | |
882 | udf_warning(sb, __func__, "mirror inode efe does not have " | |
883 | "short allocation descriptors!"); | |
884 | iput(mdata->s_mirror_fe); | |
885 | mdata->s_mirror_fe = NULL; | |
886 | if (fe_error) | |
887 | goto error_exit; | |
888 | } | |
889 | ||
890 | /* | |
891 | * bitmap file entry | |
892 | * Note: | |
893 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) | |
894 | */ | |
895 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { | |
896 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; | |
897 | addr.partitionReferenceNum = map->s_partition_num; | |
898 | ||
899 | udf_debug("Bitmap file location: block = %d part = %d\n", | |
900 | addr.logicalBlockNum, addr.partitionReferenceNum); | |
901 | ||
902 | mdata->s_bitmap_fe = udf_iget(sb, &addr); | |
903 | ||
904 | if (mdata->s_bitmap_fe == NULL) { | |
905 | if (sb->s_flags & MS_RDONLY) | |
906 | udf_warning(sb, __func__, "bitmap inode efe " | |
907 | "not found but it's ok since the disc" | |
908 | " is mounted read-only"); | |
909 | else { | |
910 | udf_error(sb, __func__, "bitmap inode efe not " | |
911 | "found and attempted read-write mount"); | |
912 | goto error_exit; | |
913 | } | |
914 | } | |
915 | } | |
916 | ||
917 | udf_debug("udf_load_metadata_files Ok\n"); | |
918 | ||
919 | return 0; | |
920 | ||
921 | error_exit: | |
922 | return 1; | |
923 | } | |
924 | ||
925 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, | |
926 | struct kernel_lb_addr *root) | |
927 | { | |
928 | struct fileSetDesc *fset; | |
929 | ||
930 | fset = (struct fileSetDesc *)bh->b_data; | |
931 | ||
932 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
933 | ||
934 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); | |
935 | ||
936 | udf_debug("Rootdir at block=%d, partition=%d\n", | |
937 | root->logicalBlockNum, root->partitionReferenceNum); | |
938 | } | |
939 | ||
940 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) | |
941 | { | |
942 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
943 | return DIV_ROUND_UP(map->s_partition_len + | |
944 | (sizeof(struct spaceBitmapDesc) << 3), | |
945 | sb->s_blocksize * 8); | |
946 | } | |
947 | ||
948 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) | |
949 | { | |
950 | struct udf_bitmap *bitmap; | |
951 | int nr_groups; | |
952 | int size; | |
953 | ||
954 | nr_groups = udf_compute_nr_groups(sb, index); | |
955 | size = sizeof(struct udf_bitmap) + | |
956 | (sizeof(struct buffer_head *) * nr_groups); | |
957 | ||
958 | if (size <= PAGE_SIZE) | |
959 | bitmap = kmalloc(size, GFP_KERNEL); | |
960 | else | |
961 | bitmap = vmalloc(size); /* TODO: get rid of vmalloc */ | |
962 | ||
963 | if (bitmap == NULL) { | |
964 | udf_error(sb, __func__, | |
965 | "Unable to allocate space for bitmap " | |
966 | "and %d buffer_head pointers", nr_groups); | |
967 | return NULL; | |
968 | } | |
969 | ||
970 | memset(bitmap, 0x00, size); | |
971 | bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); | |
972 | bitmap->s_nr_groups = nr_groups; | |
973 | return bitmap; | |
974 | } | |
975 | ||
976 | static int udf_fill_partdesc_info(struct super_block *sb, | |
977 | struct partitionDesc *p, int p_index) | |
978 | { | |
979 | struct udf_part_map *map; | |
980 | struct udf_sb_info *sbi = UDF_SB(sb); | |
981 | struct partitionHeaderDesc *phd; | |
982 | ||
983 | map = &sbi->s_partmaps[p_index]; | |
984 | ||
985 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
986 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
987 | ||
988 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
989 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
990 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
991 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
992 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
993 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
994 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
995 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
996 | ||
997 | udf_debug("Partition (%d type %x) starts at physical %d, " | |
998 | "block length %d\n", p_index, | |
999 | map->s_partition_type, map->s_partition_root, | |
1000 | map->s_partition_len); | |
1001 | ||
1002 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
1003 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
1004 | return 0; | |
1005 | ||
1006 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1007 | if (phd->unallocSpaceTable.extLength) { | |
1008 | struct kernel_lb_addr loc = { | |
1009 | .logicalBlockNum = le32_to_cpu( | |
1010 | phd->unallocSpaceTable.extPosition), | |
1011 | .partitionReferenceNum = p_index, | |
1012 | }; | |
1013 | ||
1014 | map->s_uspace.s_table = udf_iget(sb, &loc); | |
1015 | if (!map->s_uspace.s_table) { | |
1016 | udf_debug("cannot load unallocSpaceTable (part %d)\n", | |
1017 | p_index); | |
1018 | return 1; | |
1019 | } | |
1020 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; | |
1021 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", | |
1022 | p_index, map->s_uspace.s_table->i_ino); | |
1023 | } | |
1024 | ||
1025 | if (phd->unallocSpaceBitmap.extLength) { | |
1026 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); | |
1027 | if (!bitmap) | |
1028 | return 1; | |
1029 | map->s_uspace.s_bitmap = bitmap; | |
1030 | bitmap->s_extLength = le32_to_cpu( | |
1031 | phd->unallocSpaceBitmap.extLength); | |
1032 | bitmap->s_extPosition = le32_to_cpu( | |
1033 | phd->unallocSpaceBitmap.extPosition); | |
1034 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; | |
1035 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index, | |
1036 | bitmap->s_extPosition); | |
1037 | } | |
1038 | ||
1039 | if (phd->partitionIntegrityTable.extLength) | |
1040 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); | |
1041 | ||
1042 | if (phd->freedSpaceTable.extLength) { | |
1043 | struct kernel_lb_addr loc = { | |
1044 | .logicalBlockNum = le32_to_cpu( | |
1045 | phd->freedSpaceTable.extPosition), | |
1046 | .partitionReferenceNum = p_index, | |
1047 | }; | |
1048 | ||
1049 | map->s_fspace.s_table = udf_iget(sb, &loc); | |
1050 | if (!map->s_fspace.s_table) { | |
1051 | udf_debug("cannot load freedSpaceTable (part %d)\n", | |
1052 | p_index); | |
1053 | return 1; | |
1054 | } | |
1055 | ||
1056 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; | |
1057 | udf_debug("freedSpaceTable (part %d) @ %ld\n", | |
1058 | p_index, map->s_fspace.s_table->i_ino); | |
1059 | } | |
1060 | ||
1061 | if (phd->freedSpaceBitmap.extLength) { | |
1062 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); | |
1063 | if (!bitmap) | |
1064 | return 1; | |
1065 | map->s_fspace.s_bitmap = bitmap; | |
1066 | bitmap->s_extLength = le32_to_cpu( | |
1067 | phd->freedSpaceBitmap.extLength); | |
1068 | bitmap->s_extPosition = le32_to_cpu( | |
1069 | phd->freedSpaceBitmap.extPosition); | |
1070 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; | |
1071 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index, | |
1072 | bitmap->s_extPosition); | |
1073 | } | |
1074 | return 0; | |
1075 | } | |
1076 | ||
1077 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) | |
1078 | { | |
1079 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1080 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
1081 | struct kernel_lb_addr ino; | |
1082 | struct buffer_head *bh = NULL; | |
1083 | struct udf_inode_info *vati; | |
1084 | uint32_t pos; | |
1085 | struct virtualAllocationTable20 *vat20; | |
1086 | ||
1087 | /* VAT file entry is in the last recorded block */ | |
1088 | ino.partitionReferenceNum = type1_index; | |
1089 | ino.logicalBlockNum = sbi->s_last_block - map->s_partition_root; | |
1090 | sbi->s_vat_inode = udf_iget(sb, &ino); | |
1091 | if (!sbi->s_vat_inode) | |
1092 | return 1; | |
1093 | ||
1094 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
1095 | map->s_type_specific.s_virtual.s_start_offset = 0; | |
1096 | map->s_type_specific.s_virtual.s_num_entries = | |
1097 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1098 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
1099 | vati = UDF_I(sbi->s_vat_inode); | |
1100 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1101 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1102 | bh = sb_bread(sb, pos); | |
1103 | if (!bh) | |
1104 | return 1; | |
1105 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; | |
1106 | } else { | |
1107 | vat20 = (struct virtualAllocationTable20 *) | |
1108 | vati->i_ext.i_data; | |
1109 | } | |
1110 | ||
1111 | map->s_type_specific.s_virtual.s_start_offset = | |
1112 | le16_to_cpu(vat20->lengthHeader); | |
1113 | map->s_type_specific.s_virtual.s_num_entries = | |
1114 | (sbi->s_vat_inode->i_size - | |
1115 | map->s_type_specific.s_virtual. | |
1116 | s_start_offset) >> 2; | |
1117 | brelse(bh); | |
1118 | } | |
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | static int udf_load_partdesc(struct super_block *sb, sector_t block) | |
1123 | { | |
1124 | struct buffer_head *bh; | |
1125 | struct partitionDesc *p; | |
1126 | struct udf_part_map *map; | |
1127 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1128 | int i, type1_idx; | |
1129 | uint16_t partitionNumber; | |
1130 | uint16_t ident; | |
1131 | int ret = 0; | |
1132 | ||
1133 | bh = udf_read_tagged(sb, block, block, &ident); | |
1134 | if (!bh) | |
1135 | return 1; | |
1136 | if (ident != TAG_IDENT_PD) | |
1137 | goto out_bh; | |
1138 | ||
1139 | p = (struct partitionDesc *)bh->b_data; | |
1140 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
1141 | ||
1142 | /* First scan for TYPE1, SPARABLE and METADATA partitions */ | |
1143 | for (i = 0; i < sbi->s_partitions; i++) { | |
1144 | map = &sbi->s_partmaps[i]; | |
1145 | udf_debug("Searching map: (%d == %d)\n", | |
1146 | map->s_partition_num, partitionNumber); | |
1147 | if (map->s_partition_num == partitionNumber && | |
1148 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1149 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
1150 | break; | |
1151 | } | |
1152 | ||
1153 | if (i >= sbi->s_partitions) { | |
1154 | udf_debug("Partition (%d) not found in partition map\n", | |
1155 | partitionNumber); | |
1156 | goto out_bh; | |
1157 | } | |
1158 | ||
1159 | ret = udf_fill_partdesc_info(sb, p, i); | |
1160 | ||
1161 | /* | |
1162 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and | |
1163 | * PHYSICAL partitions are already set up | |
1164 | */ | |
1165 | type1_idx = i; | |
1166 | for (i = 0; i < sbi->s_partitions; i++) { | |
1167 | map = &sbi->s_partmaps[i]; | |
1168 | ||
1169 | if (map->s_partition_num == partitionNumber && | |
1170 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
1171 | map->s_partition_type == UDF_VIRTUAL_MAP20 || | |
1172 | map->s_partition_type == UDF_METADATA_MAP25)) | |
1173 | break; | |
1174 | } | |
1175 | ||
1176 | if (i >= sbi->s_partitions) | |
1177 | goto out_bh; | |
1178 | ||
1179 | ret = udf_fill_partdesc_info(sb, p, i); | |
1180 | if (ret) | |
1181 | goto out_bh; | |
1182 | ||
1183 | if (map->s_partition_type == UDF_METADATA_MAP25) { | |
1184 | ret = udf_load_metadata_files(sb, i); | |
1185 | if (ret) { | |
1186 | printk(KERN_ERR "UDF-fs: error loading MetaData " | |
1187 | "partition map %d\n", i); | |
1188 | goto out_bh; | |
1189 | } | |
1190 | } else { | |
1191 | ret = udf_load_vat(sb, i, type1_idx); | |
1192 | if (ret) | |
1193 | goto out_bh; | |
1194 | /* | |
1195 | * Mark filesystem read-only if we have a partition with | |
1196 | * virtual map since we don't handle writing to it (we | |
1197 | * overwrite blocks instead of relocating them). | |
1198 | */ | |
1199 | sb->s_flags |= MS_RDONLY; | |
1200 | printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only " | |
1201 | "because writing to pseudooverwrite partition is " | |
1202 | "not implemented.\n"); | |
1203 | } | |
1204 | out_bh: | |
1205 | /* In case loading failed, we handle cleanup in udf_fill_super */ | |
1206 | brelse(bh); | |
1207 | return ret; | |
1208 | } | |
1209 | ||
1210 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, | |
1211 | struct kernel_lb_addr *fileset) | |
1212 | { | |
1213 | struct logicalVolDesc *lvd; | |
1214 | int i, j, offset; | |
1215 | uint8_t type; | |
1216 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1217 | struct genericPartitionMap *gpm; | |
1218 | uint16_t ident; | |
1219 | struct buffer_head *bh; | |
1220 | int ret = 0; | |
1221 | ||
1222 | bh = udf_read_tagged(sb, block, block, &ident); | |
1223 | if (!bh) | |
1224 | return 1; | |
1225 | BUG_ON(ident != TAG_IDENT_LVD); | |
1226 | lvd = (struct logicalVolDesc *)bh->b_data; | |
1227 | ||
1228 | i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); | |
1229 | if (i != 0) { | |
1230 | ret = i; | |
1231 | goto out_bh; | |
1232 | } | |
1233 | ||
1234 | for (i = 0, offset = 0; | |
1235 | i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength); | |
1236 | i++, offset += gpm->partitionMapLength) { | |
1237 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1238 | gpm = (struct genericPartitionMap *) | |
1239 | &(lvd->partitionMaps[offset]); | |
1240 | type = gpm->partitionMapType; | |
1241 | if (type == 1) { | |
1242 | struct genericPartitionMap1 *gpm1 = | |
1243 | (struct genericPartitionMap1 *)gpm; | |
1244 | map->s_partition_type = UDF_TYPE1_MAP15; | |
1245 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1246 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1247 | map->s_partition_func = NULL; | |
1248 | } else if (type == 2) { | |
1249 | struct udfPartitionMap2 *upm2 = | |
1250 | (struct udfPartitionMap2 *)gpm; | |
1251 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1252 | strlen(UDF_ID_VIRTUAL))) { | |
1253 | u16 suf = | |
1254 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1255 | identSuffix)[0]); | |
1256 | if (suf < 0x0200) { | |
1257 | map->s_partition_type = | |
1258 | UDF_VIRTUAL_MAP15; | |
1259 | map->s_partition_func = | |
1260 | udf_get_pblock_virt15; | |
1261 | } else { | |
1262 | map->s_partition_type = | |
1263 | UDF_VIRTUAL_MAP20; | |
1264 | map->s_partition_func = | |
1265 | udf_get_pblock_virt20; | |
1266 | } | |
1267 | } else if (!strncmp(upm2->partIdent.ident, | |
1268 | UDF_ID_SPARABLE, | |
1269 | strlen(UDF_ID_SPARABLE))) { | |
1270 | uint32_t loc; | |
1271 | struct sparingTable *st; | |
1272 | struct sparablePartitionMap *spm = | |
1273 | (struct sparablePartitionMap *)gpm; | |
1274 | ||
1275 | map->s_partition_type = UDF_SPARABLE_MAP15; | |
1276 | map->s_type_specific.s_sparing.s_packet_len = | |
1277 | le16_to_cpu(spm->packetLength); | |
1278 | for (j = 0; j < spm->numSparingTables; j++) { | |
1279 | struct buffer_head *bh2; | |
1280 | ||
1281 | loc = le32_to_cpu( | |
1282 | spm->locSparingTable[j]); | |
1283 | bh2 = udf_read_tagged(sb, loc, loc, | |
1284 | &ident); | |
1285 | map->s_type_specific.s_sparing. | |
1286 | s_spar_map[j] = bh2; | |
1287 | ||
1288 | if (bh2 == NULL) | |
1289 | continue; | |
1290 | ||
1291 | st = (struct sparingTable *)bh2->b_data; | |
1292 | if (ident != 0 || strncmp( | |
1293 | st->sparingIdent.ident, | |
1294 | UDF_ID_SPARING, | |
1295 | strlen(UDF_ID_SPARING))) { | |
1296 | brelse(bh2); | |
1297 | map->s_type_specific.s_sparing. | |
1298 | s_spar_map[j] = NULL; | |
1299 | } | |
1300 | } | |
1301 | map->s_partition_func = udf_get_pblock_spar15; | |
1302 | } else if (!strncmp(upm2->partIdent.ident, | |
1303 | UDF_ID_METADATA, | |
1304 | strlen(UDF_ID_METADATA))) { | |
1305 | struct udf_meta_data *mdata = | |
1306 | &map->s_type_specific.s_metadata; | |
1307 | struct metadataPartitionMap *mdm = | |
1308 | (struct metadataPartitionMap *) | |
1309 | &(lvd->partitionMaps[offset]); | |
1310 | udf_debug("Parsing Logical vol part %d " | |
1311 | "type %d id=%s\n", i, type, | |
1312 | UDF_ID_METADATA); | |
1313 | ||
1314 | map->s_partition_type = UDF_METADATA_MAP25; | |
1315 | map->s_partition_func = udf_get_pblock_meta25; | |
1316 | ||
1317 | mdata->s_meta_file_loc = | |
1318 | le32_to_cpu(mdm->metadataFileLoc); | |
1319 | mdata->s_mirror_file_loc = | |
1320 | le32_to_cpu(mdm->metadataMirrorFileLoc); | |
1321 | mdata->s_bitmap_file_loc = | |
1322 | le32_to_cpu(mdm->metadataBitmapFileLoc); | |
1323 | mdata->s_alloc_unit_size = | |
1324 | le32_to_cpu(mdm->allocUnitSize); | |
1325 | mdata->s_align_unit_size = | |
1326 | le16_to_cpu(mdm->alignUnitSize); | |
1327 | mdata->s_dup_md_flag = | |
1328 | mdm->flags & 0x01; | |
1329 | ||
1330 | udf_debug("Metadata Ident suffix=0x%x\n", | |
1331 | (le16_to_cpu( | |
1332 | ((__le16 *) | |
1333 | mdm->partIdent.identSuffix)[0]))); | |
1334 | udf_debug("Metadata part num=%d\n", | |
1335 | le16_to_cpu(mdm->partitionNum)); | |
1336 | udf_debug("Metadata part alloc unit size=%d\n", | |
1337 | le32_to_cpu(mdm->allocUnitSize)); | |
1338 | udf_debug("Metadata file loc=%d\n", | |
1339 | le32_to_cpu(mdm->metadataFileLoc)); | |
1340 | udf_debug("Mirror file loc=%d\n", | |
1341 | le32_to_cpu(mdm->metadataMirrorFileLoc)); | |
1342 | udf_debug("Bitmap file loc=%d\n", | |
1343 | le32_to_cpu(mdm->metadataBitmapFileLoc)); | |
1344 | udf_debug("Duplicate Flag: %d %d\n", | |
1345 | mdata->s_dup_md_flag, mdm->flags); | |
1346 | } else { | |
1347 | udf_debug("Unknown ident: %s\n", | |
1348 | upm2->partIdent.ident); | |
1349 | continue; | |
1350 | } | |
1351 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); | |
1352 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1353 | } | |
1354 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
1355 | i, map->s_partition_num, type, | |
1356 | map->s_volumeseqnum); | |
1357 | } | |
1358 | ||
1359 | if (fileset) { | |
1360 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); | |
1361 | ||
1362 | *fileset = lelb_to_cpu(la->extLocation); | |
1363 | udf_debug("FileSet found in LogicalVolDesc at block=%d, " | |
1364 | "partition=%d\n", fileset->logicalBlockNum, | |
1365 | fileset->partitionReferenceNum); | |
1366 | } | |
1367 | if (lvd->integritySeqExt.extLength) | |
1368 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
1369 | ||
1370 | out_bh: | |
1371 | brelse(bh); | |
1372 | return ret; | |
1373 | } | |
1374 | ||
1375 | /* | |
1376 | * udf_load_logicalvolint | |
1377 | * | |
1378 | */ | |
1379 | static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) | |
1380 | { | |
1381 | struct buffer_head *bh = NULL; | |
1382 | uint16_t ident; | |
1383 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1384 | struct logicalVolIntegrityDesc *lvid; | |
1385 | ||
1386 | while (loc.extLength > 0 && | |
1387 | (bh = udf_read_tagged(sb, loc.extLocation, | |
1388 | loc.extLocation, &ident)) && | |
1389 | ident == TAG_IDENT_LVID) { | |
1390 | sbi->s_lvid_bh = bh; | |
1391 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1392 | ||
1393 | if (lvid->nextIntegrityExt.extLength) | |
1394 | udf_load_logicalvolint(sb, | |
1395 | leea_to_cpu(lvid->nextIntegrityExt)); | |
1396 | ||
1397 | if (sbi->s_lvid_bh != bh) | |
1398 | brelse(bh); | |
1399 | loc.extLength -= sb->s_blocksize; | |
1400 | loc.extLocation++; | |
1401 | } | |
1402 | if (sbi->s_lvid_bh != bh) | |
1403 | brelse(bh); | |
1404 | } | |
1405 | ||
1406 | /* | |
1407 | * udf_process_sequence | |
1408 | * | |
1409 | * PURPOSE | |
1410 | * Process a main/reserve volume descriptor sequence. | |
1411 | * | |
1412 | * PRE-CONDITIONS | |
1413 | * sb Pointer to _locked_ superblock. | |
1414 | * block First block of first extent of the sequence. | |
1415 | * lastblock Lastblock of first extent of the sequence. | |
1416 | * | |
1417 | * HISTORY | |
1418 | * July 1, 1997 - Andrew E. Mileski | |
1419 | * Written, tested, and released. | |
1420 | */ | |
1421 | static noinline int udf_process_sequence(struct super_block *sb, long block, | |
1422 | long lastblock, struct kernel_lb_addr *fileset) | |
1423 | { | |
1424 | struct buffer_head *bh = NULL; | |
1425 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
1426 | struct udf_vds_record *curr; | |
1427 | struct generic_desc *gd; | |
1428 | struct volDescPtr *vdp; | |
1429 | int done = 0; | |
1430 | uint32_t vdsn; | |
1431 | uint16_t ident; | |
1432 | long next_s = 0, next_e = 0; | |
1433 | ||
1434 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1435 | ||
1436 | /* | |
1437 | * Read the main descriptor sequence and find which descriptors | |
1438 | * are in it. | |
1439 | */ | |
1440 | for (; (!done && block <= lastblock); block++) { | |
1441 | ||
1442 | bh = udf_read_tagged(sb, block, block, &ident); | |
1443 | if (!bh) { | |
1444 | printk(KERN_ERR "udf: Block %Lu of volume descriptor " | |
1445 | "sequence is corrupted or we could not read " | |
1446 | "it.\n", (unsigned long long)block); | |
1447 | return 1; | |
1448 | } | |
1449 | ||
1450 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1451 | gd = (struct generic_desc *)bh->b_data; | |
1452 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
1453 | switch (ident) { | |
1454 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ | |
1455 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; | |
1456 | if (vdsn >= curr->volDescSeqNum) { | |
1457 | curr->volDescSeqNum = vdsn; | |
1458 | curr->block = block; | |
1459 | } | |
1460 | break; | |
1461 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ | |
1462 | curr = &vds[VDS_POS_VOL_DESC_PTR]; | |
1463 | if (vdsn >= curr->volDescSeqNum) { | |
1464 | curr->volDescSeqNum = vdsn; | |
1465 | curr->block = block; | |
1466 | ||
1467 | vdp = (struct volDescPtr *)bh->b_data; | |
1468 | next_s = le32_to_cpu( | |
1469 | vdp->nextVolDescSeqExt.extLocation); | |
1470 | next_e = le32_to_cpu( | |
1471 | vdp->nextVolDescSeqExt.extLength); | |
1472 | next_e = next_e >> sb->s_blocksize_bits; | |
1473 | next_e += next_s; | |
1474 | } | |
1475 | break; | |
1476 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ | |
1477 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; | |
1478 | if (vdsn >= curr->volDescSeqNum) { | |
1479 | curr->volDescSeqNum = vdsn; | |
1480 | curr->block = block; | |
1481 | } | |
1482 | break; | |
1483 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ | |
1484 | curr = &vds[VDS_POS_PARTITION_DESC]; | |
1485 | if (!curr->block) | |
1486 | curr->block = block; | |
1487 | break; | |
1488 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ | |
1489 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; | |
1490 | if (vdsn >= curr->volDescSeqNum) { | |
1491 | curr->volDescSeqNum = vdsn; | |
1492 | curr->block = block; | |
1493 | } | |
1494 | break; | |
1495 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ | |
1496 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; | |
1497 | if (vdsn >= curr->volDescSeqNum) { | |
1498 | curr->volDescSeqNum = vdsn; | |
1499 | curr->block = block; | |
1500 | } | |
1501 | break; | |
1502 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ | |
1503 | vds[VDS_POS_TERMINATING_DESC].block = block; | |
1504 | if (next_e) { | |
1505 | block = next_s; | |
1506 | lastblock = next_e; | |
1507 | next_s = next_e = 0; | |
1508 | } else | |
1509 | done = 1; | |
1510 | break; | |
1511 | } | |
1512 | brelse(bh); | |
1513 | } | |
1514 | /* | |
1515 | * Now read interesting descriptors again and process them | |
1516 | * in a suitable order | |
1517 | */ | |
1518 | if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { | |
1519 | printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n"); | |
1520 | return 1; | |
1521 | } | |
1522 | if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) | |
1523 | return 1; | |
1524 | ||
1525 | if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, | |
1526 | vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) | |
1527 | return 1; | |
1528 | ||
1529 | if (vds[VDS_POS_PARTITION_DESC].block) { | |
1530 | /* | |
1531 | * We rescan the whole descriptor sequence to find | |
1532 | * partition descriptor blocks and process them. | |
1533 | */ | |
1534 | for (block = vds[VDS_POS_PARTITION_DESC].block; | |
1535 | block < vds[VDS_POS_TERMINATING_DESC].block; | |
1536 | block++) | |
1537 | if (udf_load_partdesc(sb, block)) | |
1538 | return 1; | |
1539 | } | |
1540 | ||
1541 | return 0; | |
1542 | } | |
1543 | ||
1544 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, | |
1545 | struct kernel_lb_addr *fileset) | |
1546 | { | |
1547 | struct anchorVolDescPtr *anchor; | |
1548 | long main_s, main_e, reserve_s, reserve_e; | |
1549 | struct udf_sb_info *sbi; | |
1550 | ||
1551 | sbi = UDF_SB(sb); | |
1552 | anchor = (struct anchorVolDescPtr *)bh->b_data; | |
1553 | ||
1554 | /* Locate the main sequence */ | |
1555 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1556 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1557 | main_e = main_e >> sb->s_blocksize_bits; | |
1558 | main_e += main_s; | |
1559 | ||
1560 | /* Locate the reserve sequence */ | |
1561 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); | |
1562 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); | |
1563 | reserve_e = reserve_e >> sb->s_blocksize_bits; | |
1564 | reserve_e += reserve_s; | |
1565 | ||
1566 | /* Process the main & reserve sequences */ | |
1567 | /* responsible for finding the PartitionDesc(s) */ | |
1568 | if (!udf_process_sequence(sb, main_s, main_e, fileset)) | |
1569 | return 1; | |
1570 | return !udf_process_sequence(sb, reserve_s, reserve_e, fileset); | |
1571 | } | |
1572 | ||
1573 | /* | |
1574 | * Check whether there is an anchor block in the given block and | |
1575 | * load Volume Descriptor Sequence if so. | |
1576 | */ | |
1577 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, | |
1578 | struct kernel_lb_addr *fileset) | |
1579 | { | |
1580 | struct buffer_head *bh; | |
1581 | uint16_t ident; | |
1582 | int ret; | |
1583 | ||
1584 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && | |
1585 | udf_fixed_to_variable(block) >= | |
1586 | sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) | |
1587 | return 0; | |
1588 | ||
1589 | bh = udf_read_tagged(sb, block, block, &ident); | |
1590 | if (!bh) | |
1591 | return 0; | |
1592 | if (ident != TAG_IDENT_AVDP) { | |
1593 | brelse(bh); | |
1594 | return 0; | |
1595 | } | |
1596 | ret = udf_load_sequence(sb, bh, fileset); | |
1597 | brelse(bh); | |
1598 | return ret; | |
1599 | } | |
1600 | ||
1601 | /* Search for an anchor volume descriptor pointer */ | |
1602 | static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock, | |
1603 | struct kernel_lb_addr *fileset) | |
1604 | { | |
1605 | sector_t last[6]; | |
1606 | int i; | |
1607 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1608 | int last_count = 0; | |
1609 | ||
1610 | /* First try user provided anchor */ | |
1611 | if (sbi->s_anchor) { | |
1612 | if (udf_check_anchor_block(sb, sbi->s_anchor, fileset)) | |
1613 | return lastblock; | |
1614 | } | |
1615 | /* | |
1616 | * according to spec, anchor is in either: | |
1617 | * block 256 | |
1618 | * lastblock-256 | |
1619 | * lastblock | |
1620 | * however, if the disc isn't closed, it could be 512. | |
1621 | */ | |
1622 | if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset)) | |
1623 | return lastblock; | |
1624 | /* | |
1625 | * The trouble is which block is the last one. Drives often misreport | |
1626 | * this so we try various possibilities. | |
1627 | */ | |
1628 | last[last_count++] = lastblock; | |
1629 | if (lastblock >= 1) | |
1630 | last[last_count++] = lastblock - 1; | |
1631 | last[last_count++] = lastblock + 1; | |
1632 | if (lastblock >= 2) | |
1633 | last[last_count++] = lastblock - 2; | |
1634 | if (lastblock >= 150) | |
1635 | last[last_count++] = lastblock - 150; | |
1636 | if (lastblock >= 152) | |
1637 | last[last_count++] = lastblock - 152; | |
1638 | ||
1639 | for (i = 0; i < last_count; i++) { | |
1640 | if (last[i] >= sb->s_bdev->bd_inode->i_size >> | |
1641 | sb->s_blocksize_bits) | |
1642 | continue; | |
1643 | if (udf_check_anchor_block(sb, last[i], fileset)) | |
1644 | return last[i]; | |
1645 | if (last[i] < 256) | |
1646 | continue; | |
1647 | if (udf_check_anchor_block(sb, last[i] - 256, fileset)) | |
1648 | return last[i]; | |
1649 | } | |
1650 | ||
1651 | /* Finally try block 512 in case media is open */ | |
1652 | if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset)) | |
1653 | return last[0]; | |
1654 | return 0; | |
1655 | } | |
1656 | ||
1657 | /* | |
1658 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from | |
1659 | * area specified by it. The function expects sbi->s_lastblock to be the last | |
1660 | * block on the media. | |
1661 | * | |
1662 | * Return 1 if ok, 0 if not found. | |
1663 | * | |
1664 | */ | |
1665 | static int udf_find_anchor(struct super_block *sb, | |
1666 | struct kernel_lb_addr *fileset) | |
1667 | { | |
1668 | sector_t lastblock; | |
1669 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1670 | ||
1671 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); | |
1672 | if (lastblock) | |
1673 | goto out; | |
1674 | ||
1675 | /* No anchor found? Try VARCONV conversion of block numbers */ | |
1676 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
1677 | /* Firstly, we try to not convert number of the last block */ | |
1678 | lastblock = udf_scan_anchors(sb, | |
1679 | udf_variable_to_fixed(sbi->s_last_block), | |
1680 | fileset); | |
1681 | if (lastblock) | |
1682 | goto out; | |
1683 | ||
1684 | /* Secondly, we try with converted number of the last block */ | |
1685 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); | |
1686 | if (!lastblock) { | |
1687 | /* VARCONV didn't help. Clear it. */ | |
1688 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); | |
1689 | return 0; | |
1690 | } | |
1691 | out: | |
1692 | sbi->s_last_block = lastblock; | |
1693 | return 1; | |
1694 | } | |
1695 | ||
1696 | /* | |
1697 | * Check Volume Structure Descriptor, find Anchor block and load Volume | |
1698 | * Descriptor Sequence | |
1699 | */ | |
1700 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, | |
1701 | int silent, struct kernel_lb_addr *fileset) | |
1702 | { | |
1703 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1704 | loff_t nsr_off; | |
1705 | ||
1706 | if (!sb_set_blocksize(sb, uopt->blocksize)) { | |
1707 | if (!silent) | |
1708 | printk(KERN_WARNING "UDF-fs: Bad block size\n"); | |
1709 | return 0; | |
1710 | } | |
1711 | sbi->s_last_block = uopt->lastblock; | |
1712 | if (!uopt->novrs) { | |
1713 | /* Check that it is NSR02 compliant */ | |
1714 | nsr_off = udf_check_vsd(sb); | |
1715 | if (!nsr_off) { | |
1716 | if (!silent) | |
1717 | printk(KERN_WARNING "UDF-fs: No VRS found\n"); | |
1718 | return 0; | |
1719 | } | |
1720 | if (nsr_off == -1) | |
1721 | udf_debug("Failed to read byte 32768. Assuming open " | |
1722 | "disc. Skipping validity check\n"); | |
1723 | if (!sbi->s_last_block) | |
1724 | sbi->s_last_block = udf_get_last_block(sb); | |
1725 | } else { | |
1726 | udf_debug("Validity check skipped because of novrs option\n"); | |
1727 | } | |
1728 | ||
1729 | /* Look for anchor block and load Volume Descriptor Sequence */ | |
1730 | sbi->s_anchor = uopt->anchor; | |
1731 | if (!udf_find_anchor(sb, fileset)) { | |
1732 | if (!silent) | |
1733 | printk(KERN_WARNING "UDF-fs: No anchor found\n"); | |
1734 | return 0; | |
1735 | } | |
1736 | return 1; | |
1737 | } | |
1738 | ||
1739 | static void udf_open_lvid(struct super_block *sb) | |
1740 | { | |
1741 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1742 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1743 | struct logicalVolIntegrityDesc *lvid; | |
1744 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
1745 | ||
1746 | if (!bh) | |
1747 | return; | |
1748 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1749 | lvidiu = udf_sb_lvidiu(sbi); | |
1750 | ||
1751 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1752 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1753 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, | |
1754 | CURRENT_TIME); | |
1755 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); | |
1756 | ||
1757 | lvid->descTag.descCRC = cpu_to_le16( | |
1758 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), | |
1759 | le16_to_cpu(lvid->descTag.descCRCLength))); | |
1760 | ||
1761 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1762 | mark_buffer_dirty(bh); | |
1763 | sbi->s_lvid_dirty = 0; | |
1764 | } | |
1765 | ||
1766 | static void udf_close_lvid(struct super_block *sb) | |
1767 | { | |
1768 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1769 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1770 | struct logicalVolIntegrityDesc *lvid; | |
1771 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
1772 | ||
1773 | if (!bh) | |
1774 | return; | |
1775 | ||
1776 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1777 | lvidiu = udf_sb_lvidiu(sbi); | |
1778 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1779 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1780 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); | |
1781 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) | |
1782 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
1783 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
1784 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
1785 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
1786 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
1787 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
1788 | ||
1789 | lvid->descTag.descCRC = cpu_to_le16( | |
1790 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), | |
1791 | le16_to_cpu(lvid->descTag.descCRCLength))); | |
1792 | ||
1793 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1794 | mark_buffer_dirty(bh); | |
1795 | sbi->s_lvid_dirty = 0; | |
1796 | } | |
1797 | ||
1798 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) | |
1799 | { | |
1800 | int i; | |
1801 | int nr_groups = bitmap->s_nr_groups; | |
1802 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * | |
1803 | nr_groups); | |
1804 | ||
1805 | for (i = 0; i < nr_groups; i++) | |
1806 | if (bitmap->s_block_bitmap[i]) | |
1807 | brelse(bitmap->s_block_bitmap[i]); | |
1808 | ||
1809 | if (size <= PAGE_SIZE) | |
1810 | kfree(bitmap); | |
1811 | else | |
1812 | vfree(bitmap); | |
1813 | } | |
1814 | ||
1815 | static void udf_free_partition(struct udf_part_map *map) | |
1816 | { | |
1817 | int i; | |
1818 | struct udf_meta_data *mdata; | |
1819 | ||
1820 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
1821 | iput(map->s_uspace.s_table); | |
1822 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
1823 | iput(map->s_fspace.s_table); | |
1824 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
1825 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
1826 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) | |
1827 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); | |
1828 | if (map->s_partition_type == UDF_SPARABLE_MAP15) | |
1829 | for (i = 0; i < 4; i++) | |
1830 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
1831 | else if (map->s_partition_type == UDF_METADATA_MAP25) { | |
1832 | mdata = &map->s_type_specific.s_metadata; | |
1833 | iput(mdata->s_metadata_fe); | |
1834 | mdata->s_metadata_fe = NULL; | |
1835 | ||
1836 | iput(mdata->s_mirror_fe); | |
1837 | mdata->s_mirror_fe = NULL; | |
1838 | ||
1839 | iput(mdata->s_bitmap_fe); | |
1840 | mdata->s_bitmap_fe = NULL; | |
1841 | } | |
1842 | } | |
1843 | ||
1844 | static int udf_fill_super(struct super_block *sb, void *options, int silent) | |
1845 | { | |
1846 | int i; | |
1847 | int ret; | |
1848 | struct inode *inode = NULL; | |
1849 | struct udf_options uopt; | |
1850 | struct kernel_lb_addr rootdir, fileset; | |
1851 | struct udf_sb_info *sbi; | |
1852 | ||
1853 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
1854 | uopt.uid = -1; | |
1855 | uopt.gid = -1; | |
1856 | uopt.umask = 0; | |
1857 | uopt.fmode = UDF_INVALID_MODE; | |
1858 | uopt.dmode = UDF_INVALID_MODE; | |
1859 | ||
1860 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); | |
1861 | if (!sbi) | |
1862 | return -ENOMEM; | |
1863 | ||
1864 | sb->s_fs_info = sbi; | |
1865 | ||
1866 | mutex_init(&sbi->s_alloc_mutex); | |
1867 | ||
1868 | if (!udf_parse_options((char *)options, &uopt, false)) | |
1869 | goto error_out; | |
1870 | ||
1871 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
1872 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { | |
1873 | udf_error(sb, "udf_read_super", | |
1874 | "utf8 cannot be combined with iocharset\n"); | |
1875 | goto error_out; | |
1876 | } | |
1877 | #ifdef CONFIG_UDF_NLS | |
1878 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { | |
1879 | uopt.nls_map = load_nls_default(); | |
1880 | if (!uopt.nls_map) | |
1881 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
1882 | else | |
1883 | udf_debug("Using default NLS map\n"); | |
1884 | } | |
1885 | #endif | |
1886 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
1887 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
1888 | ||
1889 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
1890 | fileset.partitionReferenceNum = 0xFFFF; | |
1891 | ||
1892 | sbi->s_flags = uopt.flags; | |
1893 | sbi->s_uid = uopt.uid; | |
1894 | sbi->s_gid = uopt.gid; | |
1895 | sbi->s_umask = uopt.umask; | |
1896 | sbi->s_fmode = uopt.fmode; | |
1897 | sbi->s_dmode = uopt.dmode; | |
1898 | sbi->s_nls_map = uopt.nls_map; | |
1899 | ||
1900 | if (uopt.session == 0xFFFFFFFF) | |
1901 | sbi->s_session = udf_get_last_session(sb); | |
1902 | else | |
1903 | sbi->s_session = uopt.session; | |
1904 | ||
1905 | udf_debug("Multi-session=%d\n", sbi->s_session); | |
1906 | ||
1907 | /* Fill in the rest of the superblock */ | |
1908 | sb->s_op = &udf_sb_ops; | |
1909 | sb->s_export_op = &udf_export_ops; | |
1910 | sb->dq_op = NULL; | |
1911 | sb->s_dirt = 0; | |
1912 | sb->s_magic = UDF_SUPER_MAGIC; | |
1913 | sb->s_time_gran = 1000; | |
1914 | ||
1915 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { | |
1916 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); | |
1917 | } else { | |
1918 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); | |
1919 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); | |
1920 | if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { | |
1921 | if (!silent) | |
1922 | printk(KERN_NOTICE | |
1923 | "UDF-fs: Rescanning with blocksize " | |
1924 | "%d\n", UDF_DEFAULT_BLOCKSIZE); | |
1925 | uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; | |
1926 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); | |
1927 | } | |
1928 | } | |
1929 | if (!ret) { | |
1930 | printk(KERN_WARNING "UDF-fs: No partition found (1)\n"); | |
1931 | goto error_out; | |
1932 | } | |
1933 | ||
1934 | udf_debug("Lastblock=%d\n", sbi->s_last_block); | |
1935 | ||
1936 | if (sbi->s_lvid_bh) { | |
1937 | struct logicalVolIntegrityDescImpUse *lvidiu = | |
1938 | udf_sb_lvidiu(sbi); | |
1939 | uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); | |
1940 | uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
1941 | /* uint16_t maxUDFWriteRev = | |
1942 | le16_to_cpu(lvidiu->maxUDFWriteRev); */ | |
1943 | ||
1944 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { | |
1945 | printk(KERN_ERR "UDF-fs: minUDFReadRev=%x " | |
1946 | "(max is %x)\n", | |
1947 | le16_to_cpu(lvidiu->minUDFReadRev), | |
1948 | UDF_MAX_READ_VERSION); | |
1949 | goto error_out; | |
1950 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) | |
1951 | sb->s_flags |= MS_RDONLY; | |
1952 | ||
1953 | sbi->s_udfrev = minUDFWriteRev; | |
1954 | ||
1955 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
1956 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
1957 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
1958 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
1959 | } | |
1960 | ||
1961 | if (!sbi->s_partitions) { | |
1962 | printk(KERN_WARNING "UDF-fs: No partition found (2)\n"); | |
1963 | goto error_out; | |
1964 | } | |
1965 | ||
1966 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & | |
1967 | UDF_PART_FLAG_READ_ONLY) { | |
1968 | printk(KERN_NOTICE "UDF-fs: Partition marked readonly; " | |
1969 | "forcing readonly mount\n"); | |
1970 | sb->s_flags |= MS_RDONLY; | |
1971 | } | |
1972 | ||
1973 | if (udf_find_fileset(sb, &fileset, &rootdir)) { | |
1974 | printk(KERN_WARNING "UDF-fs: No fileset found\n"); | |
1975 | goto error_out; | |
1976 | } | |
1977 | ||
1978 | if (!silent) { | |
1979 | struct timestamp ts; | |
1980 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); | |
1981 | udf_info("UDF: Mounting volume '%s', " | |
1982 | "timestamp %04u/%02u/%02u %02u:%02u (%x)\n", | |
1983 | sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day, | |
1984 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); | |
1985 | } | |
1986 | if (!(sb->s_flags & MS_RDONLY)) | |
1987 | udf_open_lvid(sb); | |
1988 | ||
1989 | /* Assign the root inode */ | |
1990 | /* assign inodes by physical block number */ | |
1991 | /* perhaps it's not extensible enough, but for now ... */ | |
1992 | inode = udf_iget(sb, &rootdir); | |
1993 | if (!inode) { | |
1994 | printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, " | |
1995 | "partition=%d\n", | |
1996 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); | |
1997 | goto error_out; | |
1998 | } | |
1999 | ||
2000 | /* Allocate a dentry for the root inode */ | |
2001 | sb->s_root = d_alloc_root(inode); | |
2002 | if (!sb->s_root) { | |
2003 | printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n"); | |
2004 | iput(inode); | |
2005 | goto error_out; | |
2006 | } | |
2007 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
2008 | return 0; | |
2009 | ||
2010 | error_out: | |
2011 | if (sbi->s_vat_inode) | |
2012 | iput(sbi->s_vat_inode); | |
2013 | if (sbi->s_partitions) | |
2014 | for (i = 0; i < sbi->s_partitions; i++) | |
2015 | udf_free_partition(&sbi->s_partmaps[i]); | |
2016 | #ifdef CONFIG_UDF_NLS | |
2017 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
2018 | unload_nls(sbi->s_nls_map); | |
2019 | #endif | |
2020 | if (!(sb->s_flags & MS_RDONLY)) | |
2021 | udf_close_lvid(sb); | |
2022 | brelse(sbi->s_lvid_bh); | |
2023 | ||
2024 | kfree(sbi->s_partmaps); | |
2025 | kfree(sbi); | |
2026 | sb->s_fs_info = NULL; | |
2027 | ||
2028 | return -EINVAL; | |
2029 | } | |
2030 | ||
2031 | static void udf_error(struct super_block *sb, const char *function, | |
2032 | const char *fmt, ...) | |
2033 | { | |
2034 | va_list args; | |
2035 | ||
2036 | if (!(sb->s_flags & MS_RDONLY)) { | |
2037 | /* mark sb error */ | |
2038 | sb->s_dirt = 1; | |
2039 | } | |
2040 | va_start(args, fmt); | |
2041 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); | |
2042 | va_end(args); | |
2043 | printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n", | |
2044 | sb->s_id, function, error_buf); | |
2045 | } | |
2046 | ||
2047 | void udf_warning(struct super_block *sb, const char *function, | |
2048 | const char *fmt, ...) | |
2049 | { | |
2050 | va_list args; | |
2051 | ||
2052 | va_start(args, fmt); | |
2053 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); | |
2054 | va_end(args); | |
2055 | printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n", | |
2056 | sb->s_id, function, error_buf); | |
2057 | } | |
2058 | ||
2059 | static void udf_put_super(struct super_block *sb) | |
2060 | { | |
2061 | int i; | |
2062 | struct udf_sb_info *sbi; | |
2063 | ||
2064 | sbi = UDF_SB(sb); | |
2065 | if (sbi->s_vat_inode) | |
2066 | iput(sbi->s_vat_inode); | |
2067 | if (sbi->s_partitions) | |
2068 | for (i = 0; i < sbi->s_partitions; i++) | |
2069 | udf_free_partition(&sbi->s_partmaps[i]); | |
2070 | #ifdef CONFIG_UDF_NLS | |
2071 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
2072 | unload_nls(sbi->s_nls_map); | |
2073 | #endif | |
2074 | if (!(sb->s_flags & MS_RDONLY)) | |
2075 | udf_close_lvid(sb); | |
2076 | brelse(sbi->s_lvid_bh); | |
2077 | kfree(sbi->s_partmaps); | |
2078 | kfree(sb->s_fs_info); | |
2079 | sb->s_fs_info = NULL; | |
2080 | } | |
2081 | ||
2082 | static int udf_sync_fs(struct super_block *sb, int wait) | |
2083 | { | |
2084 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2085 | ||
2086 | mutex_lock(&sbi->s_alloc_mutex); | |
2087 | if (sbi->s_lvid_dirty) { | |
2088 | /* | |
2089 | * Blockdevice will be synced later so we don't have to submit | |
2090 | * the buffer for IO | |
2091 | */ | |
2092 | mark_buffer_dirty(sbi->s_lvid_bh); | |
2093 | sb->s_dirt = 0; | |
2094 | sbi->s_lvid_dirty = 0; | |
2095 | } | |
2096 | mutex_unlock(&sbi->s_alloc_mutex); | |
2097 | ||
2098 | return 0; | |
2099 | } | |
2100 | ||
2101 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) | |
2102 | { | |
2103 | struct super_block *sb = dentry->d_sb; | |
2104 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2105 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
2106 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); | |
2107 | ||
2108 | if (sbi->s_lvid_bh != NULL) | |
2109 | lvidiu = udf_sb_lvidiu(sbi); | |
2110 | else | |
2111 | lvidiu = NULL; | |
2112 | ||
2113 | buf->f_type = UDF_SUPER_MAGIC; | |
2114 | buf->f_bsize = sb->s_blocksize; | |
2115 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; | |
2116 | buf->f_bfree = udf_count_free(sb); | |
2117 | buf->f_bavail = buf->f_bfree; | |
2118 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + | |
2119 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
2120 | + buf->f_bfree; | |
2121 | buf->f_ffree = buf->f_bfree; | |
2122 | buf->f_namelen = UDF_NAME_LEN - 2; | |
2123 | buf->f_fsid.val[0] = (u32)id; | |
2124 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
2125 | ||
2126 | return 0; | |
2127 | } | |
2128 | ||
2129 | static unsigned int udf_count_free_bitmap(struct super_block *sb, | |
2130 | struct udf_bitmap *bitmap) | |
2131 | { | |
2132 | struct buffer_head *bh = NULL; | |
2133 | unsigned int accum = 0; | |
2134 | int index; | |
2135 | int block = 0, newblock; | |
2136 | struct kernel_lb_addr loc; | |
2137 | uint32_t bytes; | |
2138 | uint8_t *ptr; | |
2139 | uint16_t ident; | |
2140 | struct spaceBitmapDesc *bm; | |
2141 | ||
2142 | lock_kernel(); | |
2143 | ||
2144 | loc.logicalBlockNum = bitmap->s_extPosition; | |
2145 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; | |
2146 | bh = udf_read_ptagged(sb, &loc, 0, &ident); | |
2147 | ||
2148 | if (!bh) { | |
2149 | printk(KERN_ERR "udf: udf_count_free failed\n"); | |
2150 | goto out; | |
2151 | } else if (ident != TAG_IDENT_SBD) { | |
2152 | brelse(bh); | |
2153 | printk(KERN_ERR "udf: udf_count_free failed\n"); | |
2154 | goto out; | |
2155 | } | |
2156 | ||
2157 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2158 | bytes = le32_to_cpu(bm->numOfBytes); | |
2159 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ | |
2160 | ptr = (uint8_t *)bh->b_data; | |
2161 | ||
2162 | while (bytes > 0) { | |
2163 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); | |
2164 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2165 | cur_bytes * 8); | |
2166 | bytes -= cur_bytes; | |
2167 | if (bytes) { | |
2168 | brelse(bh); | |
2169 | newblock = udf_get_lb_pblock(sb, &loc, ++block); | |
2170 | bh = udf_tread(sb, newblock); | |
2171 | if (!bh) { | |
2172 | udf_debug("read failed\n"); | |
2173 | goto out; | |
2174 | } | |
2175 | index = 0; | |
2176 | ptr = (uint8_t *)bh->b_data; | |
2177 | } | |
2178 | } | |
2179 | brelse(bh); | |
2180 | ||
2181 | out: | |
2182 | unlock_kernel(); | |
2183 | ||
2184 | return accum; | |
2185 | } | |
2186 | ||
2187 | static unsigned int udf_count_free_table(struct super_block *sb, | |
2188 | struct inode *table) | |
2189 | { | |
2190 | unsigned int accum = 0; | |
2191 | uint32_t elen; | |
2192 | struct kernel_lb_addr eloc; | |
2193 | int8_t etype; | |
2194 | struct extent_position epos; | |
2195 | ||
2196 | lock_kernel(); | |
2197 | ||
2198 | epos.block = UDF_I(table)->i_location; | |
2199 | epos.offset = sizeof(struct unallocSpaceEntry); | |
2200 | epos.bh = NULL; | |
2201 | ||
2202 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) | |
2203 | accum += (elen >> table->i_sb->s_blocksize_bits); | |
2204 | ||
2205 | brelse(epos.bh); | |
2206 | ||
2207 | unlock_kernel(); | |
2208 | ||
2209 | return accum; | |
2210 | } | |
2211 | ||
2212 | static unsigned int udf_count_free(struct super_block *sb) | |
2213 | { | |
2214 | unsigned int accum = 0; | |
2215 | struct udf_sb_info *sbi; | |
2216 | struct udf_part_map *map; | |
2217 | ||
2218 | sbi = UDF_SB(sb); | |
2219 | if (sbi->s_lvid_bh) { | |
2220 | struct logicalVolIntegrityDesc *lvid = | |
2221 | (struct logicalVolIntegrityDesc *) | |
2222 | sbi->s_lvid_bh->b_data; | |
2223 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { | |
2224 | accum = le32_to_cpu( | |
2225 | lvid->freeSpaceTable[sbi->s_partition]); | |
2226 | if (accum == 0xFFFFFFFF) | |
2227 | accum = 0; | |
2228 | } | |
2229 | } | |
2230 | ||
2231 | if (accum) | |
2232 | return accum; | |
2233 | ||
2234 | map = &sbi->s_partmaps[sbi->s_partition]; | |
2235 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
2236 | accum += udf_count_free_bitmap(sb, | |
2237 | map->s_uspace.s_bitmap); | |
2238 | } | |
2239 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { | |
2240 | accum += udf_count_free_bitmap(sb, | |
2241 | map->s_fspace.s_bitmap); | |
2242 | } | |
2243 | if (accum) | |
2244 | return accum; | |
2245 | ||
2246 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { | |
2247 | accum += udf_count_free_table(sb, | |
2248 | map->s_uspace.s_table); | |
2249 | } | |
2250 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { | |
2251 | accum += udf_count_free_table(sb, | |
2252 | map->s_fspace.s_table); | |
2253 | } | |
2254 | ||
2255 | return accum; | |
2256 | } |