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 | |
3a71fc5d MS |
36 | * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced |
37 | * vol descs. rewrote option handling based on isofs | |
1da177e4 LT |
38 | * 12/20/98 find the free space bitmap (if it exists) |
39 | */ | |
40 | ||
cb00ea35 | 41 | #include "udfdecl.h" |
1da177e4 | 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> | |
1da177e4 LT |
51 | #include <linux/buffer_head.h> |
52 | #include <linux/vfs.h> | |
53 | #include <linux/vmalloc.h> | |
dc5d39be | 54 | #include <linux/errno.h> |
6da80894 MS |
55 | #include <linux/mount.h> |
56 | #include <linux/seq_file.h> | |
01b954a3 | 57 | #include <linux/bitmap.h> |
f845fced | 58 | #include <linux/crc-itu-t.h> |
1df2ae31 | 59 | #include <linux/log2.h> |
1da177e4 LT |
60 | #include <asm/byteorder.h> |
61 | ||
1da177e4 LT |
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 | ||
6da80894 MS |
77 | #define UDF_DEFAULT_BLOCKSIZE 2048 |
78 | ||
8de52778 AV |
79 | enum { UDF_MAX_LINKS = 0xffff }; |
80 | ||
1da177e4 LT |
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 *); | |
146bca72 | 84 | static int udf_sync_fs(struct super_block *, int); |
1da177e4 | 85 | static int udf_remount_fs(struct super_block *, int *, char *); |
5ca4e4be | 86 | static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); |
5ca4e4be PE |
87 | static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, |
88 | struct kernel_lb_addr *); | |
cb00ea35 | 89 | static void udf_load_fileset(struct super_block *, struct buffer_head *, |
5ca4e4be | 90 | struct kernel_lb_addr *); |
1da177e4 LT |
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 *); | |
726c3342 | 94 | static int udf_statfs(struct dentry *, struct kstatfs *); |
34c80b1d | 95 | static int udf_show_options(struct seq_file *, struct dentry *); |
1da177e4 | 96 | |
6c79e987 MS |
97 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) |
98 | { | |
4b11111a MS |
99 | struct logicalVolIntegrityDesc *lvid = |
100 | (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; | |
6c79e987 | 101 | __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); |
4b11111a MS |
102 | __u32 offset = number_of_partitions * 2 * |
103 | sizeof(uint32_t)/sizeof(uint8_t); | |
6c79e987 MS |
104 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
105 | } | |
106 | ||
1da177e4 | 107 | /* UDF filesystem type */ |
152a0836 AV |
108 | static struct dentry *udf_mount(struct file_system_type *fs_type, |
109 | int flags, const char *dev_name, void *data) | |
1da177e4 | 110 | { |
152a0836 | 111 | return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super); |
1da177e4 LT |
112 | } |
113 | ||
114 | static struct file_system_type udf_fstype = { | |
28de7948 CG |
115 | .owner = THIS_MODULE, |
116 | .name = "udf", | |
152a0836 | 117 | .mount = udf_mount, |
28de7948 CG |
118 | .kill_sb = kill_block_super, |
119 | .fs_flags = FS_REQUIRES_DEV, | |
1da177e4 LT |
120 | }; |
121 | ||
cb00ea35 | 122 | static struct kmem_cache *udf_inode_cachep; |
1da177e4 LT |
123 | |
124 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
125 | { | |
126 | struct udf_inode_info *ei; | |
3a71fc5d | 127 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
128 | if (!ei) |
129 | return NULL; | |
95f8797f DB |
130 | |
131 | ei->i_unique = 0; | |
132 | ei->i_lenExtents = 0; | |
133 | ei->i_next_alloc_block = 0; | |
134 | ei->i_next_alloc_goal = 0; | |
135 | ei->i_strat4096 = 0; | |
4d0fb621 | 136 | init_rwsem(&ei->i_data_sem); |
95f8797f | 137 | |
1da177e4 LT |
138 | return &ei->vfs_inode; |
139 | } | |
140 | ||
fa0d7e3d | 141 | static void udf_i_callback(struct rcu_head *head) |
1da177e4 | 142 | { |
fa0d7e3d | 143 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
144 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); |
145 | } | |
146 | ||
fa0d7e3d NP |
147 | static void udf_destroy_inode(struct inode *inode) |
148 | { | |
149 | call_rcu(&inode->i_rcu, udf_i_callback); | |
150 | } | |
151 | ||
51cc5068 | 152 | static void init_once(void *foo) |
1da177e4 | 153 | { |
cb00ea35 | 154 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 155 | |
a35afb83 CL |
156 | ei->i_ext.i_data = NULL; |
157 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
158 | } |
159 | ||
160 | static int init_inodecache(void) | |
161 | { | |
162 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
163 | sizeof(struct udf_inode_info), | |
cb00ea35 CG |
164 | 0, (SLAB_RECLAIM_ACCOUNT | |
165 | SLAB_MEM_SPREAD), | |
20c2df83 | 166 | init_once); |
28de7948 | 167 | if (!udf_inode_cachep) |
1da177e4 LT |
168 | return -ENOMEM; |
169 | return 0; | |
170 | } | |
171 | ||
172 | static void destroy_inodecache(void) | |
173 | { | |
1a1d92c1 | 174 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
175 | } |
176 | ||
177 | /* Superblock operations */ | |
ee9b6d61 | 178 | static const struct super_operations udf_sb_ops = { |
28de7948 CG |
179 | .alloc_inode = udf_alloc_inode, |
180 | .destroy_inode = udf_destroy_inode, | |
181 | .write_inode = udf_write_inode, | |
3aac2b62 | 182 | .evict_inode = udf_evict_inode, |
28de7948 | 183 | .put_super = udf_put_super, |
146bca72 | 184 | .sync_fs = udf_sync_fs, |
28de7948 CG |
185 | .statfs = udf_statfs, |
186 | .remount_fs = udf_remount_fs, | |
6da80894 | 187 | .show_options = udf_show_options, |
1da177e4 LT |
188 | }; |
189 | ||
cb00ea35 | 190 | struct udf_options { |
1da177e4 LT |
191 | unsigned char novrs; |
192 | unsigned int blocksize; | |
193 | unsigned int session; | |
194 | unsigned int lastblock; | |
195 | unsigned int anchor; | |
196 | unsigned int volume; | |
197 | unsigned short partition; | |
198 | unsigned int fileset; | |
199 | unsigned int rootdir; | |
200 | unsigned int flags; | |
faa17292 | 201 | umode_t umask; |
1da177e4 LT |
202 | gid_t gid; |
203 | uid_t uid; | |
faa17292 AV |
204 | umode_t fmode; |
205 | umode_t dmode; | |
1da177e4 LT |
206 | struct nls_table *nls_map; |
207 | }; | |
208 | ||
209 | static int __init init_udf_fs(void) | |
210 | { | |
211 | int err; | |
28de7948 | 212 | |
1da177e4 LT |
213 | err = init_inodecache(); |
214 | if (err) | |
215 | goto out1; | |
216 | err = register_filesystem(&udf_fstype); | |
217 | if (err) | |
218 | goto out; | |
28de7948 | 219 | |
1da177e4 | 220 | return 0; |
28de7948 CG |
221 | |
222 | out: | |
1da177e4 | 223 | destroy_inodecache(); |
28de7948 CG |
224 | |
225 | out1: | |
1da177e4 LT |
226 | return err; |
227 | } | |
228 | ||
229 | static void __exit exit_udf_fs(void) | |
230 | { | |
231 | unregister_filesystem(&udf_fstype); | |
232 | destroy_inodecache(); | |
233 | } | |
234 | ||
235 | module_init(init_udf_fs) | |
28de7948 | 236 | module_exit(exit_udf_fs) |
1da177e4 | 237 | |
dc5d39be MS |
238 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
239 | { | |
240 | struct udf_sb_info *sbi = UDF_SB(sb); | |
241 | ||
242 | sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), | |
243 | GFP_KERNEL); | |
244 | if (!sbi->s_partmaps) { | |
8076c363 JP |
245 | udf_err(sb, "Unable to allocate space for %d partition maps\n", |
246 | count); | |
dc5d39be MS |
247 | sbi->s_partitions = 0; |
248 | return -ENOMEM; | |
249 | } | |
250 | ||
251 | sbi->s_partitions = count; | |
252 | return 0; | |
253 | } | |
254 | ||
bff943af JK |
255 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
256 | { | |
257 | int i; | |
258 | int nr_groups = bitmap->s_nr_groups; | |
259 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * | |
260 | nr_groups); | |
261 | ||
262 | for (i = 0; i < nr_groups; i++) | |
263 | if (bitmap->s_block_bitmap[i]) | |
264 | brelse(bitmap->s_block_bitmap[i]); | |
265 | ||
266 | if (size <= PAGE_SIZE) | |
267 | kfree(bitmap); | |
268 | else | |
269 | vfree(bitmap); | |
270 | } | |
271 | ||
272 | static void udf_free_partition(struct udf_part_map *map) | |
273 | { | |
274 | int i; | |
275 | struct udf_meta_data *mdata; | |
276 | ||
277 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
278 | iput(map->s_uspace.s_table); | |
279 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
280 | iput(map->s_fspace.s_table); | |
281 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
282 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
283 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) | |
284 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); | |
285 | if (map->s_partition_type == UDF_SPARABLE_MAP15) | |
286 | for (i = 0; i < 4; i++) | |
287 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
288 | else if (map->s_partition_type == UDF_METADATA_MAP25) { | |
289 | mdata = &map->s_type_specific.s_metadata; | |
290 | iput(mdata->s_metadata_fe); | |
291 | mdata->s_metadata_fe = NULL; | |
292 | ||
293 | iput(mdata->s_mirror_fe); | |
294 | mdata->s_mirror_fe = NULL; | |
295 | ||
296 | iput(mdata->s_bitmap_fe); | |
297 | mdata->s_bitmap_fe = NULL; | |
298 | } | |
299 | } | |
300 | ||
301 | static void udf_sb_free_partitions(struct super_block *sb) | |
302 | { | |
303 | struct udf_sb_info *sbi = UDF_SB(sb); | |
304 | int i; | |
305 | ||
306 | for (i = 0; i < sbi->s_partitions; i++) | |
307 | udf_free_partition(&sbi->s_partmaps[i]); | |
308 | kfree(sbi->s_partmaps); | |
309 | sbi->s_partmaps = NULL; | |
310 | } | |
311 | ||
34c80b1d | 312 | static int udf_show_options(struct seq_file *seq, struct dentry *root) |
6da80894 | 313 | { |
34c80b1d | 314 | struct super_block *sb = root->d_sb; |
6da80894 MS |
315 | struct udf_sb_info *sbi = UDF_SB(sb); |
316 | ||
317 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
318 | seq_puts(seq, ",nostrict"); | |
1197e4df | 319 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) |
6da80894 MS |
320 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); |
321 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
322 | seq_puts(seq, ",unhide"); | |
323 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
324 | seq_puts(seq, ",undelete"); | |
325 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
326 | seq_puts(seq, ",noadinicb"); | |
327 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
328 | seq_puts(seq, ",shortad"); | |
329 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
330 | seq_puts(seq, ",uid=forget"); | |
331 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) | |
332 | seq_puts(seq, ",uid=ignore"); | |
333 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) | |
334 | seq_puts(seq, ",gid=forget"); | |
335 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) | |
336 | seq_puts(seq, ",gid=ignore"); | |
337 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) | |
338 | seq_printf(seq, ",uid=%u", sbi->s_uid); | |
339 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) | |
340 | seq_printf(seq, ",gid=%u", sbi->s_gid); | |
341 | if (sbi->s_umask != 0) | |
faa17292 | 342 | seq_printf(seq, ",umask=%ho", sbi->s_umask); |
87bc730c | 343 | if (sbi->s_fmode != UDF_INVALID_MODE) |
faa17292 | 344 | seq_printf(seq, ",mode=%ho", sbi->s_fmode); |
87bc730c | 345 | if (sbi->s_dmode != UDF_INVALID_MODE) |
faa17292 | 346 | seq_printf(seq, ",dmode=%ho", sbi->s_dmode); |
6da80894 MS |
347 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) |
348 | seq_printf(seq, ",session=%u", sbi->s_session); | |
349 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) | |
350 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
40346005 JK |
351 | if (sbi->s_anchor != 0) |
352 | seq_printf(seq, ",anchor=%u", sbi->s_anchor); | |
6da80894 MS |
353 | /* |
354 | * volume, partition, fileset and rootdir seem to be ignored | |
355 | * currently | |
356 | */ | |
357 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) | |
358 | seq_puts(seq, ",utf8"); | |
359 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
360 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
1da177e4 LT |
365 | /* |
366 | * udf_parse_options | |
367 | * | |
368 | * PURPOSE | |
369 | * Parse mount options. | |
370 | * | |
371 | * DESCRIPTION | |
372 | * The following mount options are supported: | |
373 | * | |
374 | * gid= Set the default group. | |
375 | * umask= Set the default umask. | |
7ac9bcd5 MS |
376 | * mode= Set the default file permissions. |
377 | * dmode= Set the default directory permissions. | |
1da177e4 LT |
378 | * uid= Set the default user. |
379 | * bs= Set the block size. | |
380 | * unhide Show otherwise hidden files. | |
381 | * undelete Show deleted files in lists. | |
382 | * adinicb Embed data in the inode (default) | |
383 | * noadinicb Don't embed data in the inode | |
384 | * shortad Use short ad's | |
385 | * longad Use long ad's (default) | |
386 | * nostrict Unset strict conformance | |
387 | * iocharset= Set the NLS character set | |
388 | * | |
389 | * The remaining are for debugging and disaster recovery: | |
390 | * | |
28de7948 | 391 | * novrs Skip volume sequence recognition |
1da177e4 LT |
392 | * |
393 | * The following expect a offset from 0. | |
394 | * | |
395 | * session= Set the CDROM session (default= last session) | |
396 | * anchor= Override standard anchor location. (default= 256) | |
397 | * volume= Override the VolumeDesc location. (unused) | |
398 | * partition= Override the PartitionDesc location. (unused) | |
399 | * lastblock= Set the last block of the filesystem/ | |
400 | * | |
401 | * The following expect a offset from the partition root. | |
402 | * | |
403 | * fileset= Override the fileset block location. (unused) | |
404 | * rootdir= Override the root directory location. (unused) | |
405 | * WARNING: overriding the rootdir to a non-directory may | |
406 | * yield highly unpredictable results. | |
407 | * | |
408 | * PRE-CONDITIONS | |
409 | * options Pointer to mount options string. | |
410 | * uopts Pointer to mount options variable. | |
411 | * | |
412 | * POST-CONDITIONS | |
413 | * <return> 1 Mount options parsed okay. | |
414 | * <return> 0 Error parsing mount options. | |
415 | * | |
416 | * HISTORY | |
417 | * July 1, 1997 - Andrew E. Mileski | |
418 | * Written, tested, and released. | |
419 | */ | |
28de7948 | 420 | |
1da177e4 LT |
421 | enum { |
422 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
423 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
424 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
425 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
426 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
7ac9bcd5 MS |
427 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, |
428 | Opt_fmode, Opt_dmode | |
1da177e4 LT |
429 | }; |
430 | ||
a447c093 | 431 | static const match_table_t tokens = { |
28de7948 CG |
432 | {Opt_novrs, "novrs"}, |
433 | {Opt_nostrict, "nostrict"}, | |
434 | {Opt_bs, "bs=%u"}, | |
435 | {Opt_unhide, "unhide"}, | |
436 | {Opt_undelete, "undelete"}, | |
437 | {Opt_noadinicb, "noadinicb"}, | |
438 | {Opt_adinicb, "adinicb"}, | |
439 | {Opt_shortad, "shortad"}, | |
440 | {Opt_longad, "longad"}, | |
441 | {Opt_uforget, "uid=forget"}, | |
442 | {Opt_uignore, "uid=ignore"}, | |
443 | {Opt_gforget, "gid=forget"}, | |
444 | {Opt_gignore, "gid=ignore"}, | |
445 | {Opt_gid, "gid=%u"}, | |
446 | {Opt_uid, "uid=%u"}, | |
447 | {Opt_umask, "umask=%o"}, | |
448 | {Opt_session, "session=%u"}, | |
449 | {Opt_lastblock, "lastblock=%u"}, | |
450 | {Opt_anchor, "anchor=%u"}, | |
451 | {Opt_volume, "volume=%u"}, | |
452 | {Opt_partition, "partition=%u"}, | |
453 | {Opt_fileset, "fileset=%u"}, | |
454 | {Opt_rootdir, "rootdir=%u"}, | |
455 | {Opt_utf8, "utf8"}, | |
456 | {Opt_iocharset, "iocharset=%s"}, | |
7ac9bcd5 MS |
457 | {Opt_fmode, "mode=%o"}, |
458 | {Opt_dmode, "dmode=%o"}, | |
28de7948 | 459 | {Opt_err, NULL} |
1da177e4 LT |
460 | }; |
461 | ||
6da80894 MS |
462 | static int udf_parse_options(char *options, struct udf_options *uopt, |
463 | bool remount) | |
1da177e4 LT |
464 | { |
465 | char *p; | |
466 | int option; | |
467 | ||
468 | uopt->novrs = 0; | |
1da177e4 LT |
469 | uopt->partition = 0xFFFF; |
470 | uopt->session = 0xFFFFFFFF; | |
471 | uopt->lastblock = 0; | |
472 | uopt->anchor = 0; | |
473 | uopt->volume = 0xFFFFFFFF; | |
474 | uopt->rootdir = 0xFFFFFFFF; | |
475 | uopt->fileset = 0xFFFFFFFF; | |
476 | uopt->nls_map = NULL; | |
477 | ||
478 | if (!options) | |
479 | return 1; | |
480 | ||
cb00ea35 | 481 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
482 | substring_t args[MAX_OPT_ARGS]; |
483 | int token; | |
484 | if (!*p) | |
485 | continue; | |
486 | ||
487 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
488 | switch (token) { |
489 | case Opt_novrs: | |
490 | uopt->novrs = 1; | |
4136801a | 491 | break; |
cb00ea35 CG |
492 | case Opt_bs: |
493 | if (match_int(&args[0], &option)) | |
494 | return 0; | |
495 | uopt->blocksize = option; | |
1197e4df | 496 | uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); |
cb00ea35 CG |
497 | break; |
498 | case Opt_unhide: | |
499 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
500 | break; | |
501 | case Opt_undelete: | |
502 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
503 | break; | |
504 | case Opt_noadinicb: | |
505 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
506 | break; | |
507 | case Opt_adinicb: | |
508 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
509 | break; | |
510 | case Opt_shortad: | |
511 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
512 | break; | |
513 | case Opt_longad: | |
514 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
515 | break; | |
516 | case Opt_gid: | |
517 | if (match_int(args, &option)) | |
518 | return 0; | |
519 | uopt->gid = option; | |
ca76d2d8 | 520 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
521 | break; |
522 | case Opt_uid: | |
523 | if (match_int(args, &option)) | |
524 | return 0; | |
525 | uopt->uid = option; | |
ca76d2d8 | 526 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
527 | break; |
528 | case Opt_umask: | |
529 | if (match_octal(args, &option)) | |
530 | return 0; | |
531 | uopt->umask = option; | |
532 | break; | |
533 | case Opt_nostrict: | |
534 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
535 | break; | |
536 | case Opt_session: | |
537 | if (match_int(args, &option)) | |
538 | return 0; | |
539 | uopt->session = option; | |
6da80894 MS |
540 | if (!remount) |
541 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
542 | break; |
543 | case Opt_lastblock: | |
544 | if (match_int(args, &option)) | |
545 | return 0; | |
546 | uopt->lastblock = option; | |
6da80894 MS |
547 | if (!remount) |
548 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
549 | break; |
550 | case Opt_anchor: | |
551 | if (match_int(args, &option)) | |
552 | return 0; | |
553 | uopt->anchor = option; | |
554 | break; | |
555 | case Opt_volume: | |
556 | if (match_int(args, &option)) | |
557 | return 0; | |
558 | uopt->volume = option; | |
559 | break; | |
560 | case Opt_partition: | |
561 | if (match_int(args, &option)) | |
562 | return 0; | |
563 | uopt->partition = option; | |
564 | break; | |
565 | case Opt_fileset: | |
566 | if (match_int(args, &option)) | |
567 | return 0; | |
568 | uopt->fileset = option; | |
569 | break; | |
570 | case Opt_rootdir: | |
571 | if (match_int(args, &option)) | |
572 | return 0; | |
573 | uopt->rootdir = option; | |
574 | break; | |
575 | case Opt_utf8: | |
576 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
577 | break; | |
1da177e4 | 578 | #ifdef CONFIG_UDF_NLS |
cb00ea35 CG |
579 | case Opt_iocharset: |
580 | uopt->nls_map = load_nls(args[0].from); | |
581 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
582 | break; | |
1da177e4 | 583 | #endif |
cb00ea35 CG |
584 | case Opt_uignore: |
585 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); | |
586 | break; | |
587 | case Opt_uforget: | |
588 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
589 | break; | |
590 | case Opt_gignore: | |
591 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); | |
592 | break; | |
593 | case Opt_gforget: | |
594 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
595 | break; | |
7ac9bcd5 MS |
596 | case Opt_fmode: |
597 | if (match_octal(args, &option)) | |
598 | return 0; | |
599 | uopt->fmode = option & 0777; | |
600 | break; | |
601 | case Opt_dmode: | |
602 | if (match_octal(args, &option)) | |
603 | return 0; | |
604 | uopt->dmode = option & 0777; | |
605 | break; | |
cb00ea35 | 606 | default: |
78ace70c | 607 | pr_err("bad mount option \"%s\" or missing value\n", p); |
1da177e4 LT |
608 | return 0; |
609 | } | |
610 | } | |
611 | return 1; | |
612 | } | |
613 | ||
cb00ea35 | 614 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
615 | { |
616 | struct udf_options uopt; | |
6c79e987 | 617 | struct udf_sb_info *sbi = UDF_SB(sb); |
c79d967d | 618 | int error = 0; |
1da177e4 | 619 | |
6c79e987 MS |
620 | uopt.flags = sbi->s_flags; |
621 | uopt.uid = sbi->s_uid; | |
622 | uopt.gid = sbi->s_gid; | |
623 | uopt.umask = sbi->s_umask; | |
7ac9bcd5 MS |
624 | uopt.fmode = sbi->s_fmode; |
625 | uopt.dmode = sbi->s_dmode; | |
1da177e4 | 626 | |
6da80894 | 627 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
628 | return -EINVAL; |
629 | ||
c03cad24 | 630 | write_lock(&sbi->s_cred_lock); |
6c79e987 MS |
631 | sbi->s_flags = uopt.flags; |
632 | sbi->s_uid = uopt.uid; | |
633 | sbi->s_gid = uopt.gid; | |
634 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
635 | sbi->s_fmode = uopt.fmode; |
636 | sbi->s_dmode = uopt.dmode; | |
c03cad24 | 637 | write_unlock(&sbi->s_cred_lock); |
1da177e4 | 638 | |
6c79e987 MS |
639 | if (sbi->s_lvid_bh) { |
640 | int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); | |
1da177e4 LT |
641 | if (write_rev > UDF_MAX_WRITE_VERSION) |
642 | *flags |= MS_RDONLY; | |
643 | } | |
644 | ||
c79d967d CH |
645 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
646 | goto out_unlock; | |
647 | ||
36350462 | 648 | if (*flags & MS_RDONLY) |
1da177e4 | 649 | udf_close_lvid(sb); |
36350462 | 650 | else |
1da177e4 LT |
651 | udf_open_lvid(sb); |
652 | ||
c79d967d | 653 | out_unlock: |
c79d967d | 654 | return error; |
1da177e4 LT |
655 | } |
656 | ||
40346005 JK |
657 | /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ |
658 | /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
659 | static loff_t udf_check_vsd(struct super_block *sb) | |
1da177e4 LT |
660 | { |
661 | struct volStructDesc *vsd = NULL; | |
f4bcbbd9 | 662 | loff_t sector = 32768; |
1da177e4 LT |
663 | int sectorsize; |
664 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
665 | int nsr02 = 0; |
666 | int nsr03 = 0; | |
6c79e987 | 667 | struct udf_sb_info *sbi; |
1da177e4 | 668 | |
6c79e987 | 669 | sbi = UDF_SB(sb); |
1da177e4 LT |
670 | if (sb->s_blocksize < sizeof(struct volStructDesc)) |
671 | sectorsize = sizeof(struct volStructDesc); | |
672 | else | |
673 | sectorsize = sb->s_blocksize; | |
674 | ||
6c79e987 | 675 | sector += (sbi->s_session << sb->s_blocksize_bits); |
1da177e4 LT |
676 | |
677 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
706047a7 SM |
678 | (unsigned int)(sector >> sb->s_blocksize_bits), |
679 | sb->s_blocksize); | |
1da177e4 | 680 | /* Process the sequence (if applicable) */ |
cb00ea35 | 681 | for (; !nsr02 && !nsr03; sector += sectorsize) { |
1da177e4 LT |
682 | /* Read a block */ |
683 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
684 | if (!bh) | |
685 | break; | |
686 | ||
687 | /* Look for ISO descriptors */ | |
688 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 689 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 690 | |
cb00ea35 | 691 | if (vsd->stdIdent[0] == 0) { |
3bf25cb4 | 692 | brelse(bh); |
1da177e4 | 693 | break; |
3a71fc5d MS |
694 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
695 | VSD_STD_ID_LEN)) { | |
cb00ea35 CG |
696 | switch (vsd->structType) { |
697 | case 0: | |
698 | udf_debug("ISO9660 Boot Record found\n"); | |
699 | break; | |
700 | case 1: | |
a983f368 | 701 | udf_debug("ISO9660 Primary Volume Descriptor found\n"); |
cb00ea35 CG |
702 | break; |
703 | case 2: | |
a983f368 | 704 | udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); |
cb00ea35 CG |
705 | break; |
706 | case 3: | |
a983f368 | 707 | udf_debug("ISO9660 Volume Partition Descriptor found\n"); |
cb00ea35 CG |
708 | break; |
709 | case 255: | |
a983f368 | 710 | udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); |
cb00ea35 CG |
711 | break; |
712 | default: | |
713 | udf_debug("ISO9660 VRS (%u) found\n", | |
714 | vsd->structType); | |
715 | break; | |
1da177e4 | 716 | } |
3a71fc5d MS |
717 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
718 | VSD_STD_ID_LEN)) | |
719 | ; /* nothing */ | |
720 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
721 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 722 | brelse(bh); |
1da177e4 | 723 | break; |
3a71fc5d MS |
724 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
725 | VSD_STD_ID_LEN)) | |
1da177e4 | 726 | nsr02 = sector; |
3a71fc5d MS |
727 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
728 | VSD_STD_ID_LEN)) | |
1da177e4 | 729 | nsr03 = sector; |
3bf25cb4 | 730 | brelse(bh); |
1da177e4 LT |
731 | } |
732 | ||
733 | if (nsr03) | |
734 | return nsr03; | |
735 | else if (nsr02) | |
736 | return nsr02; | |
6c79e987 | 737 | else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) |
1da177e4 LT |
738 | return -1; |
739 | else | |
740 | return 0; | |
741 | } | |
742 | ||
3a71fc5d | 743 | static int udf_find_fileset(struct super_block *sb, |
5ca4e4be PE |
744 | struct kernel_lb_addr *fileset, |
745 | struct kernel_lb_addr *root) | |
1da177e4 LT |
746 | { |
747 | struct buffer_head *bh = NULL; | |
748 | long lastblock; | |
749 | uint16_t ident; | |
6c79e987 | 750 | struct udf_sb_info *sbi; |
1da177e4 LT |
751 | |
752 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 753 | fileset->partitionReferenceNum != 0xFFFF) { |
97e961fd | 754 | bh = udf_read_ptagged(sb, fileset, 0, &ident); |
1da177e4 | 755 | |
28de7948 | 756 | if (!bh) { |
1da177e4 | 757 | return 1; |
28de7948 | 758 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 759 | brelse(bh); |
1da177e4 LT |
760 | return 1; |
761 | } | |
cb00ea35 | 762 | |
1da177e4 LT |
763 | } |
764 | ||
6c79e987 | 765 | sbi = UDF_SB(sb); |
3a71fc5d MS |
766 | if (!bh) { |
767 | /* Search backwards through the partitions */ | |
5ca4e4be | 768 | struct kernel_lb_addr newfileset; |
1da177e4 | 769 | |
28de7948 | 770 | /* --> cvg: FIXME - is it reasonable? */ |
1da177e4 | 771 | return 1; |
cb00ea35 | 772 | |
6c79e987 | 773 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
cb00ea35 CG |
774 | (newfileset.partitionReferenceNum != 0xFFFF && |
775 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
776 | fileset->partitionReferenceNum == 0xFFFF); | |
777 | newfileset.partitionReferenceNum--) { | |
6c79e987 MS |
778 | lastblock = sbi->s_partmaps |
779 | [newfileset.partitionReferenceNum] | |
780 | .s_partition_len; | |
1da177e4 LT |
781 | newfileset.logicalBlockNum = 0; |
782 | ||
cb00ea35 | 783 | do { |
97e961fd | 784 | bh = udf_read_ptagged(sb, &newfileset, 0, |
3a71fc5d | 785 | &ident); |
cb00ea35 CG |
786 | if (!bh) { |
787 | newfileset.logicalBlockNum++; | |
1da177e4 LT |
788 | continue; |
789 | } | |
790 | ||
cb00ea35 CG |
791 | switch (ident) { |
792 | case TAG_IDENT_SBD: | |
28de7948 CG |
793 | { |
794 | struct spaceBitmapDesc *sp; | |
4b11111a MS |
795 | sp = (struct spaceBitmapDesc *) |
796 | bh->b_data; | |
28de7948 CG |
797 | newfileset.logicalBlockNum += 1 + |
798 | ((le32_to_cpu(sp->numOfBytes) + | |
4b11111a MS |
799 | sizeof(struct spaceBitmapDesc) |
800 | - 1) >> sb->s_blocksize_bits); | |
28de7948 CG |
801 | brelse(bh); |
802 | break; | |
803 | } | |
cb00ea35 | 804 | case TAG_IDENT_FSD: |
28de7948 CG |
805 | *fileset = newfileset; |
806 | break; | |
cb00ea35 | 807 | default: |
28de7948 CG |
808 | newfileset.logicalBlockNum++; |
809 | brelse(bh); | |
810 | bh = NULL; | |
811 | break; | |
1da177e4 | 812 | } |
28de7948 CG |
813 | } while (newfileset.logicalBlockNum < lastblock && |
814 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
815 | fileset->partitionReferenceNum == 0xFFFF); | |
1da177e4 LT |
816 | } |
817 | } | |
818 | ||
819 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 820 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
1da177e4 | 821 | udf_debug("Fileset at block=%d, partition=%d\n", |
cb00ea35 CG |
822 | fileset->logicalBlockNum, |
823 | fileset->partitionReferenceNum); | |
1da177e4 | 824 | |
6c79e987 | 825 | sbi->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 826 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 827 | brelse(bh); |
1da177e4 LT |
828 | return 0; |
829 | } | |
830 | return 1; | |
831 | } | |
832 | ||
c0eb31ed | 833 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
834 | { |
835 | struct primaryVolDesc *pvoldesc; | |
ba9aadd8 | 836 | struct ustr *instr, *outstr; |
c0eb31ed JK |
837 | struct buffer_head *bh; |
838 | uint16_t ident; | |
ba9aadd8 MS |
839 | int ret = 1; |
840 | ||
841 | instr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
842 | if (!instr) | |
843 | return 1; | |
844 | ||
845 | outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
846 | if (!outstr) | |
847 | goto out1; | |
c0eb31ed JK |
848 | |
849 | bh = udf_read_tagged(sb, block, block, &ident); | |
850 | if (!bh) | |
ba9aadd8 MS |
851 | goto out2; |
852 | ||
c0eb31ed | 853 | BUG_ON(ident != TAG_IDENT_PVD); |
1da177e4 LT |
854 | |
855 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
856 | ||
56774805 MS |
857 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
858 | pvoldesc->recordingDateAndTime)) { | |
af15a298 | 859 | #ifdef UDFFS_DEBUG |
5ca4e4be | 860 | struct timestamp *ts = &pvoldesc->recordingDateAndTime; |
a983f368 | 861 | udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", |
af15a298 MS |
862 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, |
863 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
864 | #endif | |
1da177e4 LT |
865 | } |
866 | ||
ba9aadd8 MS |
867 | if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) |
868 | if (udf_CS0toUTF8(outstr, instr)) { | |
869 | strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, | |
870 | outstr->u_len > 31 ? 31 : outstr->u_len); | |
4b11111a | 871 | udf_debug("volIdent[] = '%s'\n", |
a983f368 | 872 | UDF_SB(sb)->s_volume_ident); |
1da177e4 | 873 | } |
1da177e4 | 874 | |
ba9aadd8 MS |
875 | if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) |
876 | if (udf_CS0toUTF8(outstr, instr)) | |
877 | udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); | |
c0eb31ed JK |
878 | |
879 | brelse(bh); | |
ba9aadd8 MS |
880 | ret = 0; |
881 | out2: | |
882 | kfree(outstr); | |
883 | out1: | |
884 | kfree(instr); | |
885 | return ret; | |
1da177e4 LT |
886 | } |
887 | ||
3080a74e NJ |
888 | struct inode *udf_find_metadata_inode_efe(struct super_block *sb, |
889 | u32 meta_file_loc, u32 partition_num) | |
890 | { | |
891 | struct kernel_lb_addr addr; | |
892 | struct inode *metadata_fe; | |
893 | ||
894 | addr.logicalBlockNum = meta_file_loc; | |
895 | addr.partitionReferenceNum = partition_num; | |
896 | ||
897 | metadata_fe = udf_iget(sb, &addr); | |
898 | ||
899 | if (metadata_fe == NULL) | |
900 | udf_warn(sb, "metadata inode efe not found\n"); | |
901 | else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { | |
902 | udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); | |
903 | iput(metadata_fe); | |
904 | metadata_fe = NULL; | |
905 | } | |
906 | ||
907 | return metadata_fe; | |
908 | } | |
909 | ||
bfb257a5 JK |
910 | static int udf_load_metadata_files(struct super_block *sb, int partition) |
911 | { | |
912 | struct udf_sb_info *sbi = UDF_SB(sb); | |
913 | struct udf_part_map *map; | |
914 | struct udf_meta_data *mdata; | |
5ca4e4be | 915 | struct kernel_lb_addr addr; |
bfb257a5 JK |
916 | |
917 | map = &sbi->s_partmaps[partition]; | |
918 | mdata = &map->s_type_specific.s_metadata; | |
919 | ||
920 | /* metadata address */ | |
bfb257a5 | 921 | udf_debug("Metadata file location: block = %d part = %d\n", |
3080a74e | 922 | mdata->s_meta_file_loc, map->s_partition_num); |
bfb257a5 | 923 | |
3080a74e NJ |
924 | mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb, |
925 | mdata->s_meta_file_loc, map->s_partition_num); | |
bfb257a5 JK |
926 | |
927 | if (mdata->s_metadata_fe == NULL) { | |
3080a74e NJ |
928 | /* mirror file entry */ |
929 | udf_debug("Mirror metadata file location: block = %d part = %d\n", | |
930 | mdata->s_mirror_file_loc, map->s_partition_num); | |
bfb257a5 | 931 | |
3080a74e NJ |
932 | mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb, |
933 | mdata->s_mirror_file_loc, map->s_partition_num); | |
bfb257a5 | 934 | |
3080a74e NJ |
935 | if (mdata->s_mirror_fe == NULL) { |
936 | udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); | |
bfb257a5 | 937 | goto error_exit; |
3080a74e | 938 | } |
bfb257a5 JK |
939 | } |
940 | ||
941 | /* | |
942 | * bitmap file entry | |
943 | * Note: | |
944 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) | |
945 | */ | |
946 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { | |
947 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; | |
948 | addr.partitionReferenceNum = map->s_partition_num; | |
949 | ||
950 | udf_debug("Bitmap file location: block = %d part = %d\n", | |
a983f368 | 951 | addr.logicalBlockNum, addr.partitionReferenceNum); |
bfb257a5 | 952 | |
97e961fd | 953 | mdata->s_bitmap_fe = udf_iget(sb, &addr); |
bfb257a5 JK |
954 | |
955 | if (mdata->s_bitmap_fe == NULL) { | |
956 | if (sb->s_flags & MS_RDONLY) | |
a40ecd7b | 957 | udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); |
bfb257a5 | 958 | else { |
8076c363 | 959 | udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); |
bfb257a5 JK |
960 | goto error_exit; |
961 | } | |
962 | } | |
963 | } | |
964 | ||
965 | udf_debug("udf_load_metadata_files Ok\n"); | |
966 | ||
967 | return 0; | |
968 | ||
969 | error_exit: | |
970 | return 1; | |
971 | } | |
972 | ||
28de7948 | 973 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
5ca4e4be | 974 | struct kernel_lb_addr *root) |
1da177e4 LT |
975 | { |
976 | struct fileSetDesc *fset; | |
977 | ||
978 | fset = (struct fileSetDesc *)bh->b_data; | |
979 | ||
980 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
981 | ||
6c79e987 | 982 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 983 | |
cb00ea35 CG |
984 | udf_debug("Rootdir at block=%d, partition=%d\n", |
985 | root->logicalBlockNum, root->partitionReferenceNum); | |
1da177e4 LT |
986 | } |
987 | ||
883cb9d1 MS |
988 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
989 | { | |
990 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
991 | return DIV_ROUND_UP(map->s_partition_len + |
992 | (sizeof(struct spaceBitmapDesc) << 3), | |
993 | sb->s_blocksize * 8); | |
883cb9d1 MS |
994 | } |
995 | ||
66e1da3f MS |
996 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
997 | { | |
66e1da3f MS |
998 | struct udf_bitmap *bitmap; |
999 | int nr_groups; | |
1000 | int size; | |
1001 | ||
883cb9d1 | 1002 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
1003 | size = sizeof(struct udf_bitmap) + |
1004 | (sizeof(struct buffer_head *) * nr_groups); | |
1005 | ||
1006 | if (size <= PAGE_SIZE) | |
ed2ae6f6 | 1007 | bitmap = kzalloc(size, GFP_KERNEL); |
66e1da3f | 1008 | else |
ed2ae6f6 | 1009 | bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ |
66e1da3f | 1010 | |
75b09e02 | 1011 | if (bitmap == NULL) |
66e1da3f | 1012 | return NULL; |
66e1da3f | 1013 | |
66e1da3f MS |
1014 | bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); |
1015 | bitmap->s_nr_groups = nr_groups; | |
1016 | return bitmap; | |
1017 | } | |
1018 | ||
3fb38dfa JK |
1019 | static int udf_fill_partdesc_info(struct super_block *sb, |
1020 | struct partitionDesc *p, int p_index) | |
1da177e4 | 1021 | { |
6c79e987 | 1022 | struct udf_part_map *map; |
165923fa | 1023 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 1024 | struct partitionHeaderDesc *phd; |
165923fa | 1025 | |
3fb38dfa | 1026 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
1027 | |
1028 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
1029 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
1030 | ||
1031 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
1032 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
1033 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
1034 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
1035 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
1036 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
1037 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
1038 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
1039 | ||
a983f368 JP |
1040 | udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n", |
1041 | p_index, map->s_partition_type, | |
1042 | map->s_partition_root, map->s_partition_len); | |
165923fa MS |
1043 | |
1044 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
1045 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
3fb38dfa | 1046 | return 0; |
165923fa MS |
1047 | |
1048 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1049 | if (phd->unallocSpaceTable.extLength) { | |
5ca4e4be | 1050 | struct kernel_lb_addr loc = { |
165923fa MS |
1051 | .logicalBlockNum = le32_to_cpu( |
1052 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 1053 | .partitionReferenceNum = p_index, |
165923fa MS |
1054 | }; |
1055 | ||
97e961fd | 1056 | map->s_uspace.s_table = udf_iget(sb, &loc); |
165923fa MS |
1057 | if (!map->s_uspace.s_table) { |
1058 | udf_debug("cannot load unallocSpaceTable (part %d)\n", | |
a983f368 | 1059 | p_index); |
3fb38dfa | 1060 | return 1; |
165923fa MS |
1061 | } |
1062 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; | |
1063 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", | |
a983f368 | 1064 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1065 | } |
1066 | ||
1067 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1068 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1069 | if (!bitmap) | |
1070 | return 1; | |
165923fa | 1071 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1072 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1073 | phd->unallocSpaceBitmap.extLength); |
2e0838fd | 1074 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1075 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1076 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
a983f368 JP |
1077 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", |
1078 | p_index, bitmap->s_extPosition); | |
165923fa MS |
1079 | } |
1080 | ||
1081 | if (phd->partitionIntegrityTable.extLength) | |
3fb38dfa | 1082 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); |
165923fa MS |
1083 | |
1084 | if (phd->freedSpaceTable.extLength) { | |
5ca4e4be | 1085 | struct kernel_lb_addr loc = { |
165923fa MS |
1086 | .logicalBlockNum = le32_to_cpu( |
1087 | phd->freedSpaceTable.extPosition), | |
3fb38dfa | 1088 | .partitionReferenceNum = p_index, |
165923fa MS |
1089 | }; |
1090 | ||
97e961fd | 1091 | map->s_fspace.s_table = udf_iget(sb, &loc); |
165923fa | 1092 | if (!map->s_fspace.s_table) { |
3fb38dfa | 1093 | udf_debug("cannot load freedSpaceTable (part %d)\n", |
a983f368 | 1094 | p_index); |
3fb38dfa | 1095 | return 1; |
165923fa MS |
1096 | } |
1097 | ||
1098 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; | |
1099 | udf_debug("freedSpaceTable (part %d) @ %ld\n", | |
a983f368 | 1100 | p_index, map->s_fspace.s_table->i_ino); |
165923fa MS |
1101 | } |
1102 | ||
1103 | if (phd->freedSpaceBitmap.extLength) { | |
3fb38dfa JK |
1104 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1105 | if (!bitmap) | |
1106 | return 1; | |
165923fa | 1107 | map->s_fspace.s_bitmap = bitmap; |
2e0838fd | 1108 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1109 | phd->freedSpaceBitmap.extLength); |
2e0838fd | 1110 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1111 | phd->freedSpaceBitmap.extPosition); |
2e0838fd | 1112 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
a983f368 JP |
1113 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", |
1114 | p_index, bitmap->s_extPosition); | |
165923fa | 1115 | } |
3fb38dfa JK |
1116 | return 0; |
1117 | } | |
1118 | ||
e971b0b9 JK |
1119 | static void udf_find_vat_block(struct super_block *sb, int p_index, |
1120 | int type1_index, sector_t start_block) | |
38b74a53 JK |
1121 | { |
1122 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1123 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
e971b0b9 | 1124 | sector_t vat_block; |
5ca4e4be | 1125 | struct kernel_lb_addr ino; |
e971b0b9 JK |
1126 | |
1127 | /* | |
1128 | * VAT file entry is in the last recorded block. Some broken disks have | |
1129 | * it a few blocks before so try a bit harder... | |
1130 | */ | |
1131 | ino.partitionReferenceNum = type1_index; | |
1132 | for (vat_block = start_block; | |
1133 | vat_block >= map->s_partition_root && | |
1134 | vat_block >= start_block - 3 && | |
1135 | !sbi->s_vat_inode; vat_block--) { | |
1136 | ino.logicalBlockNum = vat_block - map->s_partition_root; | |
1137 | sbi->s_vat_inode = udf_iget(sb, &ino); | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) | |
1142 | { | |
1143 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1144 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
fa5e0815 JK |
1145 | struct buffer_head *bh = NULL; |
1146 | struct udf_inode_info *vati; | |
1147 | uint32_t pos; | |
1148 | struct virtualAllocationTable20 *vat20; | |
4bf17af0 | 1149 | sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; |
38b74a53 | 1150 | |
e971b0b9 | 1151 | udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); |
4bf17af0 JK |
1152 | if (!sbi->s_vat_inode && |
1153 | sbi->s_last_block != blocks - 1) { | |
78ace70c JP |
1154 | pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", |
1155 | (unsigned long)sbi->s_last_block, | |
1156 | (unsigned long)blocks - 1); | |
e971b0b9 | 1157 | udf_find_vat_block(sb, p_index, type1_index, blocks - 1); |
4bf17af0 | 1158 | } |
38b74a53 JK |
1159 | if (!sbi->s_vat_inode) |
1160 | return 1; | |
1161 | ||
1162 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
47c9358a | 1163 | map->s_type_specific.s_virtual.s_start_offset = 0; |
38b74a53 JK |
1164 | map->s_type_specific.s_virtual.s_num_entries = |
1165 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1166 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
fa5e0815 JK |
1167 | vati = UDF_I(sbi->s_vat_inode); |
1168 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1169 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1170 | bh = sb_bread(sb, pos); | |
1171 | if (!bh) | |
1172 | return 1; | |
1173 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; | |
1174 | } else { | |
1175 | vat20 = (struct virtualAllocationTable20 *) | |
1176 | vati->i_ext.i_data; | |
1177 | } | |
38b74a53 | 1178 | |
38b74a53 | 1179 | map->s_type_specific.s_virtual.s_start_offset = |
47c9358a | 1180 | le16_to_cpu(vat20->lengthHeader); |
38b74a53 JK |
1181 | map->s_type_specific.s_virtual.s_num_entries = |
1182 | (sbi->s_vat_inode->i_size - | |
1183 | map->s_type_specific.s_virtual. | |
1184 | s_start_offset) >> 2; | |
1185 | brelse(bh); | |
1186 | } | |
1187 | return 0; | |
1188 | } | |
1189 | ||
3fb38dfa JK |
1190 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
1191 | { | |
1192 | struct buffer_head *bh; | |
1193 | struct partitionDesc *p; | |
1194 | struct udf_part_map *map; | |
1195 | struct udf_sb_info *sbi = UDF_SB(sb); | |
38b74a53 | 1196 | int i, type1_idx; |
3fb38dfa JK |
1197 | uint16_t partitionNumber; |
1198 | uint16_t ident; | |
1199 | int ret = 0; | |
1200 | ||
1201 | bh = udf_read_tagged(sb, block, block, &ident); | |
1202 | if (!bh) | |
1203 | return 1; | |
1204 | if (ident != TAG_IDENT_PD) | |
1205 | goto out_bh; | |
1206 | ||
1207 | p = (struct partitionDesc *)bh->b_data; | |
1208 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
38b74a53 | 1209 | |
bfb257a5 | 1210 | /* First scan for TYPE1, SPARABLE and METADATA partitions */ |
3fb38dfa JK |
1211 | for (i = 0; i < sbi->s_partitions; i++) { |
1212 | map = &sbi->s_partmaps[i]; | |
1213 | udf_debug("Searching map: (%d == %d)\n", | |
1214 | map->s_partition_num, partitionNumber); | |
38b74a53 JK |
1215 | if (map->s_partition_num == partitionNumber && |
1216 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1217 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
3fb38dfa JK |
1218 | break; |
1219 | } | |
1220 | ||
38b74a53 | 1221 | if (i >= sbi->s_partitions) { |
3fb38dfa JK |
1222 | udf_debug("Partition (%d) not found in partition map\n", |
1223 | partitionNumber); | |
1224 | goto out_bh; | |
1225 | } | |
165923fa | 1226 | |
3fb38dfa | 1227 | ret = udf_fill_partdesc_info(sb, p, i); |
38b74a53 JK |
1228 | |
1229 | /* | |
bfb257a5 JK |
1230 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
1231 | * PHYSICAL partitions are already set up | |
38b74a53 JK |
1232 | */ |
1233 | type1_idx = i; | |
1234 | for (i = 0; i < sbi->s_partitions; i++) { | |
1235 | map = &sbi->s_partmaps[i]; | |
1236 | ||
1237 | if (map->s_partition_num == partitionNumber && | |
1238 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
bfb257a5 JK |
1239 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
1240 | map->s_partition_type == UDF_METADATA_MAP25)) | |
38b74a53 JK |
1241 | break; |
1242 | } | |
1243 | ||
1244 | if (i >= sbi->s_partitions) | |
1245 | goto out_bh; | |
1246 | ||
1247 | ret = udf_fill_partdesc_info(sb, p, i); | |
1248 | if (ret) | |
1249 | goto out_bh; | |
1250 | ||
bfb257a5 JK |
1251 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
1252 | ret = udf_load_metadata_files(sb, i); | |
1253 | if (ret) { | |
78ace70c JP |
1254 | udf_err(sb, "error loading MetaData partition map %d\n", |
1255 | i); | |
bfb257a5 JK |
1256 | goto out_bh; |
1257 | } | |
1258 | } else { | |
1259 | ret = udf_load_vat(sb, i, type1_idx); | |
1260 | if (ret) | |
1261 | goto out_bh; | |
1262 | /* | |
1263 | * Mark filesystem read-only if we have a partition with | |
1264 | * virtual map since we don't handle writing to it (we | |
1265 | * overwrite blocks instead of relocating them). | |
1266 | */ | |
1267 | sb->s_flags |= MS_RDONLY; | |
78ace70c | 1268 | pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n"); |
bfb257a5 | 1269 | } |
c0eb31ed | 1270 | out_bh: |
2e0838fd | 1271 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1272 | brelse(bh); |
1273 | return ret; | |
1da177e4 LT |
1274 | } |
1275 | ||
1df2ae31 JK |
1276 | static int udf_load_sparable_map(struct super_block *sb, |
1277 | struct udf_part_map *map, | |
1278 | struct sparablePartitionMap *spm) | |
1279 | { | |
1280 | uint32_t loc; | |
1281 | uint16_t ident; | |
1282 | struct sparingTable *st; | |
1283 | struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing; | |
1284 | int i; | |
1285 | struct buffer_head *bh; | |
1286 | ||
1287 | map->s_partition_type = UDF_SPARABLE_MAP15; | |
1288 | sdata->s_packet_len = le16_to_cpu(spm->packetLength); | |
1289 | if (!is_power_of_2(sdata->s_packet_len)) { | |
1290 | udf_err(sb, "error loading logical volume descriptor: " | |
1291 | "Invalid packet length %u\n", | |
1292 | (unsigned)sdata->s_packet_len); | |
1293 | return -EIO; | |
1294 | } | |
1295 | if (spm->numSparingTables > 4) { | |
1296 | udf_err(sb, "error loading logical volume descriptor: " | |
1297 | "Too many sparing tables (%d)\n", | |
1298 | (int)spm->numSparingTables); | |
1299 | return -EIO; | |
1300 | } | |
1301 | ||
1302 | for (i = 0; i < spm->numSparingTables; i++) { | |
1303 | loc = le32_to_cpu(spm->locSparingTable[i]); | |
1304 | bh = udf_read_tagged(sb, loc, loc, &ident); | |
1305 | if (!bh) | |
1306 | continue; | |
1307 | ||
1308 | st = (struct sparingTable *)bh->b_data; | |
1309 | if (ident != 0 || | |
1310 | strncmp(st->sparingIdent.ident, UDF_ID_SPARING, | |
1311 | strlen(UDF_ID_SPARING)) || | |
1312 | sizeof(*st) + le16_to_cpu(st->reallocationTableLen) > | |
1313 | sb->s_blocksize) { | |
1314 | brelse(bh); | |
1315 | continue; | |
1316 | } | |
1317 | ||
1318 | sdata->s_spar_map[i] = bh; | |
1319 | } | |
1320 | map->s_partition_func = udf_get_pblock_spar15; | |
1321 | return 0; | |
1322 | } | |
1323 | ||
c0eb31ed | 1324 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
5ca4e4be | 1325 | struct kernel_lb_addr *fileset) |
1da177e4 LT |
1326 | { |
1327 | struct logicalVolDesc *lvd; | |
1df2ae31 | 1328 | int i, offset; |
1da177e4 | 1329 | uint8_t type; |
6c79e987 | 1330 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1331 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1332 | uint16_t ident; |
1333 | struct buffer_head *bh; | |
adee11b2 | 1334 | unsigned int table_len; |
c0eb31ed | 1335 | int ret = 0; |
1da177e4 | 1336 | |
c0eb31ed JK |
1337 | bh = udf_read_tagged(sb, block, block, &ident); |
1338 | if (!bh) | |
1339 | return 1; | |
1340 | BUG_ON(ident != TAG_IDENT_LVD); | |
1da177e4 | 1341 | lvd = (struct logicalVolDesc *)bh->b_data; |
adee11b2 | 1342 | table_len = le32_to_cpu(lvd->mapTableLength); |
57b9655d | 1343 | if (table_len > sb->s_blocksize - sizeof(*lvd)) { |
adee11b2 JK |
1344 | udf_err(sb, "error loading logical volume descriptor: " |
1345 | "Partition table too long (%u > %lu)\n", table_len, | |
1346 | sb->s_blocksize - sizeof(*lvd)); | |
1347 | goto out_bh; | |
1348 | } | |
1da177e4 | 1349 | |
cb14d340 JK |
1350 | ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
1351 | if (ret) | |
c0eb31ed | 1352 | goto out_bh; |
1da177e4 | 1353 | |
cb00ea35 | 1354 | for (i = 0, offset = 0; |
adee11b2 | 1355 | i < sbi->s_partitions && offset < table_len; |
4b11111a MS |
1356 | i++, offset += gpm->partitionMapLength) { |
1357 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1358 | gpm = (struct genericPartitionMap *) | |
1359 | &(lvd->partitionMaps[offset]); | |
1360 | type = gpm->partitionMapType; | |
cb00ea35 | 1361 | if (type == 1) { |
4b11111a MS |
1362 | struct genericPartitionMap1 *gpm1 = |
1363 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1364 | map->s_partition_type = UDF_TYPE1_MAP15; |
1365 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1366 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1367 | map->s_partition_func = NULL; | |
cb00ea35 | 1368 | } else if (type == 2) { |
4b11111a MS |
1369 | struct udfPartitionMap2 *upm2 = |
1370 | (struct udfPartitionMap2 *)gpm; | |
1371 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1372 | strlen(UDF_ID_VIRTUAL))) { | |
1373 | u16 suf = | |
1374 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1375 | identSuffix)[0]); | |
c82a1275 | 1376 | if (suf < 0x0200) { |
4b11111a MS |
1377 | map->s_partition_type = |
1378 | UDF_VIRTUAL_MAP15; | |
1379 | map->s_partition_func = | |
1380 | udf_get_pblock_virt15; | |
c82a1275 | 1381 | } else { |
4b11111a MS |
1382 | map->s_partition_type = |
1383 | UDF_VIRTUAL_MAP20; | |
1384 | map->s_partition_func = | |
1385 | udf_get_pblock_virt20; | |
1da177e4 | 1386 | } |
4b11111a MS |
1387 | } else if (!strncmp(upm2->partIdent.ident, |
1388 | UDF_ID_SPARABLE, | |
1389 | strlen(UDF_ID_SPARABLE))) { | |
1df2ae31 JK |
1390 | if (udf_load_sparable_map(sb, map, |
1391 | (struct sparablePartitionMap *)gpm) < 0) | |
1392 | goto out_bh; | |
bfb257a5 JK |
1393 | } else if (!strncmp(upm2->partIdent.ident, |
1394 | UDF_ID_METADATA, | |
1395 | strlen(UDF_ID_METADATA))) { | |
1396 | struct udf_meta_data *mdata = | |
1397 | &map->s_type_specific.s_metadata; | |
1398 | struct metadataPartitionMap *mdm = | |
1399 | (struct metadataPartitionMap *) | |
1400 | &(lvd->partitionMaps[offset]); | |
a983f368 JP |
1401 | udf_debug("Parsing Logical vol part %d type %d id=%s\n", |
1402 | i, type, UDF_ID_METADATA); | |
bfb257a5 JK |
1403 | |
1404 | map->s_partition_type = UDF_METADATA_MAP25; | |
1405 | map->s_partition_func = udf_get_pblock_meta25; | |
1406 | ||
1407 | mdata->s_meta_file_loc = | |
1408 | le32_to_cpu(mdm->metadataFileLoc); | |
1409 | mdata->s_mirror_file_loc = | |
1410 | le32_to_cpu(mdm->metadataMirrorFileLoc); | |
1411 | mdata->s_bitmap_file_loc = | |
1412 | le32_to_cpu(mdm->metadataBitmapFileLoc); | |
1413 | mdata->s_alloc_unit_size = | |
1414 | le32_to_cpu(mdm->allocUnitSize); | |
1415 | mdata->s_align_unit_size = | |
1416 | le16_to_cpu(mdm->alignUnitSize); | |
ed47a7d0 JK |
1417 | if (mdm->flags & 0x01) |
1418 | mdata->s_flags |= MF_DUPLICATE_MD; | |
bfb257a5 JK |
1419 | |
1420 | udf_debug("Metadata Ident suffix=0x%x\n", | |
a983f368 JP |
1421 | le16_to_cpu(*(__le16 *) |
1422 | mdm->partIdent.identSuffix)); | |
bfb257a5 | 1423 | udf_debug("Metadata part num=%d\n", |
a983f368 | 1424 | le16_to_cpu(mdm->partitionNum)); |
bfb257a5 | 1425 | udf_debug("Metadata part alloc unit size=%d\n", |
a983f368 | 1426 | le32_to_cpu(mdm->allocUnitSize)); |
bfb257a5 | 1427 | udf_debug("Metadata file loc=%d\n", |
a983f368 | 1428 | le32_to_cpu(mdm->metadataFileLoc)); |
bfb257a5 | 1429 | udf_debug("Mirror file loc=%d\n", |
a983f368 | 1430 | le32_to_cpu(mdm->metadataMirrorFileLoc)); |
bfb257a5 | 1431 | udf_debug("Bitmap file loc=%d\n", |
a983f368 | 1432 | le32_to_cpu(mdm->metadataBitmapFileLoc)); |
ed47a7d0 JK |
1433 | udf_debug("Flags: %d %d\n", |
1434 | mdata->s_flags, mdm->flags); | |
cb00ea35 | 1435 | } else { |
3a71fc5d MS |
1436 | udf_debug("Unknown ident: %s\n", |
1437 | upm2->partIdent.ident); | |
1da177e4 LT |
1438 | continue; |
1439 | } | |
6c79e987 MS |
1440 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1441 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 LT |
1442 | } |
1443 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
a983f368 | 1444 | i, map->s_partition_num, type, map->s_volumeseqnum); |
1da177e4 LT |
1445 | } |
1446 | ||
cb00ea35 | 1447 | if (fileset) { |
5ca4e4be | 1448 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1449 | |
1450 | *fileset = lelb_to_cpu(la->extLocation); | |
a983f368 JP |
1451 | udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n", |
1452 | fileset->logicalBlockNum, | |
28de7948 | 1453 | fileset->partitionReferenceNum); |
1da177e4 LT |
1454 | } |
1455 | if (lvd->integritySeqExt.extLength) | |
1456 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
28de7948 | 1457 | |
c0eb31ed JK |
1458 | out_bh: |
1459 | brelse(bh); | |
1460 | return ret; | |
1da177e4 LT |
1461 | } |
1462 | ||
1463 | /* | |
1464 | * udf_load_logicalvolint | |
1465 | * | |
1466 | */ | |
5ca4e4be | 1467 | static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) |
1da177e4 LT |
1468 | { |
1469 | struct buffer_head *bh = NULL; | |
1470 | uint16_t ident; | |
6c79e987 MS |
1471 | struct udf_sb_info *sbi = UDF_SB(sb); |
1472 | struct logicalVolIntegrityDesc *lvid; | |
1da177e4 LT |
1473 | |
1474 | while (loc.extLength > 0 && | |
cb00ea35 CG |
1475 | (bh = udf_read_tagged(sb, loc.extLocation, |
1476 | loc.extLocation, &ident)) && | |
1477 | ident == TAG_IDENT_LVID) { | |
6c79e987 MS |
1478 | sbi->s_lvid_bh = bh; |
1479 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
cb00ea35 | 1480 | |
6c79e987 | 1481 | if (lvid->nextIntegrityExt.extLength) |
3a71fc5d | 1482 | udf_load_logicalvolint(sb, |
6c79e987 | 1483 | leea_to_cpu(lvid->nextIntegrityExt)); |
cb00ea35 | 1484 | |
6c79e987 | 1485 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1486 | brelse(bh); |
1da177e4 | 1487 | loc.extLength -= sb->s_blocksize; |
cb00ea35 | 1488 | loc.extLocation++; |
1da177e4 | 1489 | } |
6c79e987 | 1490 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1491 | brelse(bh); |
1da177e4 LT |
1492 | } |
1493 | ||
1494 | /* | |
1495 | * udf_process_sequence | |
1496 | * | |
1497 | * PURPOSE | |
1498 | * Process a main/reserve volume descriptor sequence. | |
1499 | * | |
1500 | * PRE-CONDITIONS | |
1501 | * sb Pointer to _locked_ superblock. | |
1502 | * block First block of first extent of the sequence. | |
1503 | * lastblock Lastblock of first extent of the sequence. | |
1504 | * | |
1505 | * HISTORY | |
1506 | * July 1, 1997 - Andrew E. Mileski | |
1507 | * Written, tested, and released. | |
1508 | */ | |
200a3592 | 1509 | static noinline int udf_process_sequence(struct super_block *sb, long block, |
5ca4e4be | 1510 | long lastblock, struct kernel_lb_addr *fileset) |
1da177e4 LT |
1511 | { |
1512 | struct buffer_head *bh = NULL; | |
1513 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
4b11111a | 1514 | struct udf_vds_record *curr; |
1da177e4 LT |
1515 | struct generic_desc *gd; |
1516 | struct volDescPtr *vdp; | |
cb00ea35 | 1517 | int done = 0; |
1da177e4 LT |
1518 | uint32_t vdsn; |
1519 | uint16_t ident; | |
1520 | long next_s = 0, next_e = 0; | |
1521 | ||
1522 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1523 | ||
c0eb31ed JK |
1524 | /* |
1525 | * Read the main descriptor sequence and find which descriptors | |
1526 | * are in it. | |
1527 | */ | |
cb00ea35 | 1528 | for (; (!done && block <= lastblock); block++) { |
1da177e4 LT |
1529 | |
1530 | bh = udf_read_tagged(sb, block, block, &ident); | |
c0eb31ed | 1531 | if (!bh) { |
78ace70c JP |
1532 | udf_err(sb, |
1533 | "Block %llu of volume descriptor sequence is corrupted or we could not read it\n", | |
1534 | (unsigned long long)block); | |
c0eb31ed JK |
1535 | return 1; |
1536 | } | |
1da177e4 LT |
1537 | |
1538 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1539 | gd = (struct generic_desc *)bh->b_data; | |
1540 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1541 | switch (ident) { |
28de7948 | 1542 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
4b11111a MS |
1543 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
1544 | if (vdsn >= curr->volDescSeqNum) { | |
1545 | curr->volDescSeqNum = vdsn; | |
1546 | curr->block = block; | |
cb00ea35 CG |
1547 | } |
1548 | break; | |
28de7948 | 1549 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
4b11111a MS |
1550 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
1551 | if (vdsn >= curr->volDescSeqNum) { | |
1552 | curr->volDescSeqNum = vdsn; | |
1553 | curr->block = block; | |
cb00ea35 CG |
1554 | |
1555 | vdp = (struct volDescPtr *)bh->b_data; | |
4b11111a MS |
1556 | next_s = le32_to_cpu( |
1557 | vdp->nextVolDescSeqExt.extLocation); | |
1558 | next_e = le32_to_cpu( | |
1559 | vdp->nextVolDescSeqExt.extLength); | |
cb00ea35 CG |
1560 | next_e = next_e >> sb->s_blocksize_bits; |
1561 | next_e += next_s; | |
1562 | } | |
1563 | break; | |
28de7948 | 1564 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
4b11111a MS |
1565 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
1566 | if (vdsn >= curr->volDescSeqNum) { | |
1567 | curr->volDescSeqNum = vdsn; | |
1568 | curr->block = block; | |
cb00ea35 CG |
1569 | } |
1570 | break; | |
28de7948 | 1571 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
4b11111a MS |
1572 | curr = &vds[VDS_POS_PARTITION_DESC]; |
1573 | if (!curr->block) | |
1574 | curr->block = block; | |
cb00ea35 | 1575 | break; |
28de7948 | 1576 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
4b11111a MS |
1577 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
1578 | if (vdsn >= curr->volDescSeqNum) { | |
1579 | curr->volDescSeqNum = vdsn; | |
1580 | curr->block = block; | |
cb00ea35 CG |
1581 | } |
1582 | break; | |
28de7948 | 1583 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
4b11111a MS |
1584 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
1585 | if (vdsn >= curr->volDescSeqNum) { | |
1586 | curr->volDescSeqNum = vdsn; | |
1587 | curr->block = block; | |
cb00ea35 CG |
1588 | } |
1589 | break; | |
28de7948 | 1590 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
cb00ea35 CG |
1591 | vds[VDS_POS_TERMINATING_DESC].block = block; |
1592 | if (next_e) { | |
1593 | block = next_s; | |
1594 | lastblock = next_e; | |
1595 | next_s = next_e = 0; | |
4b11111a | 1596 | } else |
cb00ea35 CG |
1597 | done = 1; |
1598 | break; | |
1da177e4 | 1599 | } |
3bf25cb4 | 1600 | brelse(bh); |
1da177e4 | 1601 | } |
c0eb31ed JK |
1602 | /* |
1603 | * Now read interesting descriptors again and process them | |
1604 | * in a suitable order | |
1605 | */ | |
1606 | if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { | |
78ace70c | 1607 | udf_err(sb, "Primary Volume Descriptor not found!\n"); |
c0eb31ed JK |
1608 | return 1; |
1609 | } | |
1610 | if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) | |
1611 | return 1; | |
165923fa | 1612 | |
c0eb31ed JK |
1613 | if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, |
1614 | vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) | |
1615 | return 1; | |
165923fa | 1616 | |
c0eb31ed JK |
1617 | if (vds[VDS_POS_PARTITION_DESC].block) { |
1618 | /* | |
1619 | * We rescan the whole descriptor sequence to find | |
1620 | * partition descriptor blocks and process them. | |
1621 | */ | |
1622 | for (block = vds[VDS_POS_PARTITION_DESC].block; | |
1623 | block < vds[VDS_POS_TERMINATING_DESC].block; | |
1624 | block++) | |
1625 | if (udf_load_partdesc(sb, block)) | |
165923fa | 1626 | return 1; |
1da177e4 LT |
1627 | } |
1628 | ||
1629 | return 0; | |
1630 | } | |
1631 | ||
40346005 JK |
1632 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, |
1633 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1634 | { |
40346005 JK |
1635 | struct anchorVolDescPtr *anchor; |
1636 | long main_s, main_e, reserve_s, reserve_e; | |
1da177e4 | 1637 | |
40346005 JK |
1638 | anchor = (struct anchorVolDescPtr *)bh->b_data; |
1639 | ||
1640 | /* Locate the main sequence */ | |
1641 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1642 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1643 | main_e = main_e >> sb->s_blocksize_bits; | |
1644 | main_e += main_s; | |
1645 | ||
1646 | /* Locate the reserve sequence */ | |
1647 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); | |
1648 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); | |
1649 | reserve_e = reserve_e >> sb->s_blocksize_bits; | |
1650 | reserve_e += reserve_s; | |
1651 | ||
1652 | /* Process the main & reserve sequences */ | |
1653 | /* responsible for finding the PartitionDesc(s) */ | |
1654 | if (!udf_process_sequence(sb, main_s, main_e, fileset)) | |
1655 | return 1; | |
bff943af JK |
1656 | udf_sb_free_partitions(sb); |
1657 | if (!udf_process_sequence(sb, reserve_s, reserve_e, fileset)) | |
1658 | return 1; | |
1659 | udf_sb_free_partitions(sb); | |
1660 | return 0; | |
1da177e4 LT |
1661 | } |
1662 | ||
40346005 JK |
1663 | /* |
1664 | * Check whether there is an anchor block in the given block and | |
1665 | * load Volume Descriptor Sequence if so. | |
1666 | */ | |
1667 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, | |
1668 | struct kernel_lb_addr *fileset) | |
1197e4df | 1669 | { |
40346005 JK |
1670 | struct buffer_head *bh; |
1671 | uint16_t ident; | |
1672 | int ret; | |
1197e4df | 1673 | |
40346005 JK |
1674 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
1675 | udf_fixed_to_variable(block) >= | |
1676 | sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) | |
1197e4df | 1677 | return 0; |
40346005 JK |
1678 | |
1679 | bh = udf_read_tagged(sb, block, block, &ident); | |
1680 | if (!bh) | |
1197e4df | 1681 | return 0; |
40346005 JK |
1682 | if (ident != TAG_IDENT_AVDP) { |
1683 | brelse(bh); | |
1197e4df CL |
1684 | return 0; |
1685 | } | |
40346005 JK |
1686 | ret = udf_load_sequence(sb, bh, fileset); |
1687 | brelse(bh); | |
1688 | return ret; | |
1197e4df CL |
1689 | } |
1690 | ||
40346005 JK |
1691 | /* Search for an anchor volume descriptor pointer */ |
1692 | static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock, | |
1693 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1694 | { |
40346005 | 1695 | sector_t last[6]; |
38b74a53 | 1696 | int i; |
40346005 JK |
1697 | struct udf_sb_info *sbi = UDF_SB(sb); |
1698 | int last_count = 0; | |
1da177e4 | 1699 | |
40346005 JK |
1700 | /* First try user provided anchor */ |
1701 | if (sbi->s_anchor) { | |
1702 | if (udf_check_anchor_block(sb, sbi->s_anchor, fileset)) | |
1703 | return lastblock; | |
1704 | } | |
1705 | /* | |
1706 | * according to spec, anchor is in either: | |
1707 | * block 256 | |
1708 | * lastblock-256 | |
1709 | * lastblock | |
1710 | * however, if the disc isn't closed, it could be 512. | |
1711 | */ | |
1712 | if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset)) | |
1713 | return lastblock; | |
1714 | /* | |
1715 | * The trouble is which block is the last one. Drives often misreport | |
1716 | * this so we try various possibilities. | |
1717 | */ | |
1718 | last[last_count++] = lastblock; | |
1719 | if (lastblock >= 1) | |
1720 | last[last_count++] = lastblock - 1; | |
1721 | last[last_count++] = lastblock + 1; | |
1722 | if (lastblock >= 2) | |
1723 | last[last_count++] = lastblock - 2; | |
1724 | if (lastblock >= 150) | |
1725 | last[last_count++] = lastblock - 150; | |
1726 | if (lastblock >= 152) | |
1727 | last[last_count++] = lastblock - 152; | |
1da177e4 | 1728 | |
40346005 JK |
1729 | for (i = 0; i < last_count; i++) { |
1730 | if (last[i] >= sb->s_bdev->bd_inode->i_size >> | |
1731 | sb->s_blocksize_bits) | |
28f7c4d4 | 1732 | continue; |
40346005 JK |
1733 | if (udf_check_anchor_block(sb, last[i], fileset)) |
1734 | return last[i]; | |
1735 | if (last[i] < 256) | |
28f7c4d4 | 1736 | continue; |
40346005 JK |
1737 | if (udf_check_anchor_block(sb, last[i] - 256, fileset)) |
1738 | return last[i]; | |
1739 | } | |
28f7c4d4 | 1740 | |
40346005 JK |
1741 | /* Finally try block 512 in case media is open */ |
1742 | if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset)) | |
1743 | return last[0]; | |
1744 | return 0; | |
1745 | } | |
28f7c4d4 | 1746 | |
40346005 JK |
1747 | /* |
1748 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from | |
1749 | * area specified by it. The function expects sbi->s_lastblock to be the last | |
1750 | * block on the media. | |
1751 | * | |
1752 | * Return 1 if ok, 0 if not found. | |
1753 | * | |
1754 | */ | |
1755 | static int udf_find_anchor(struct super_block *sb, | |
1756 | struct kernel_lb_addr *fileset) | |
1757 | { | |
1758 | sector_t lastblock; | |
1759 | struct udf_sb_info *sbi = UDF_SB(sb); | |
28f7c4d4 | 1760 | |
40346005 JK |
1761 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); |
1762 | if (lastblock) | |
1763 | goto out; | |
1da177e4 | 1764 | |
40346005 JK |
1765 | /* No anchor found? Try VARCONV conversion of block numbers */ |
1766 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
1767 | /* Firstly, we try to not convert number of the last block */ | |
1768 | lastblock = udf_scan_anchors(sb, | |
1769 | udf_variable_to_fixed(sbi->s_last_block), | |
1770 | fileset); | |
1771 | if (lastblock) | |
1772 | goto out; | |
1da177e4 | 1773 | |
40346005 JK |
1774 | /* Secondly, we try with converted number of the last block */ |
1775 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); | |
1776 | if (!lastblock) { | |
1777 | /* VARCONV didn't help. Clear it. */ | |
1778 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); | |
1779 | return 0; | |
1da177e4 | 1780 | } |
40346005 JK |
1781 | out: |
1782 | sbi->s_last_block = lastblock; | |
1783 | return 1; | |
1784 | } | |
1da177e4 | 1785 | |
40346005 JK |
1786 | /* |
1787 | * Check Volume Structure Descriptor, find Anchor block and load Volume | |
1788 | * Descriptor Sequence | |
1789 | */ | |
1790 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, | |
1791 | int silent, struct kernel_lb_addr *fileset) | |
1792 | { | |
1793 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1794 | loff_t nsr_off; | |
1795 | ||
1796 | if (!sb_set_blocksize(sb, uopt->blocksize)) { | |
1797 | if (!silent) | |
78ace70c | 1798 | udf_warn(sb, "Bad block size\n"); |
40346005 JK |
1799 | return 0; |
1800 | } | |
1801 | sbi->s_last_block = uopt->lastblock; | |
1802 | if (!uopt->novrs) { | |
1803 | /* Check that it is NSR02 compliant */ | |
1804 | nsr_off = udf_check_vsd(sb); | |
1805 | if (!nsr_off) { | |
1806 | if (!silent) | |
78ace70c | 1807 | udf_warn(sb, "No VRS found\n"); |
40346005 JK |
1808 | return 0; |
1809 | } | |
1810 | if (nsr_off == -1) | |
a983f368 | 1811 | udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n"); |
40346005 JK |
1812 | if (!sbi->s_last_block) |
1813 | sbi->s_last_block = udf_get_last_block(sb); | |
1814 | } else { | |
1815 | udf_debug("Validity check skipped because of novrs option\n"); | |
28f7c4d4 | 1816 | } |
1da177e4 | 1817 | |
40346005 JK |
1818 | /* Look for anchor block and load Volume Descriptor Sequence */ |
1819 | sbi->s_anchor = uopt->anchor; | |
1820 | if (!udf_find_anchor(sb, fileset)) { | |
1821 | if (!silent) | |
78ace70c | 1822 | udf_warn(sb, "No anchor found\n"); |
40346005 JK |
1823 | return 0; |
1824 | } | |
1825 | return 1; | |
1da177e4 LT |
1826 | } |
1827 | ||
1828 | static void udf_open_lvid(struct super_block *sb) | |
1829 | { | |
6c79e987 MS |
1830 | struct udf_sb_info *sbi = UDF_SB(sb); |
1831 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
1832 | struct logicalVolIntegrityDesc *lvid; |
1833 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
146bca72 | 1834 | |
165923fa MS |
1835 | if (!bh) |
1836 | return; | |
949f4a7c JK |
1837 | |
1838 | mutex_lock(&sbi->s_alloc_mutex); | |
165923fa MS |
1839 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
1840 | lvidiu = udf_sb_lvidiu(sbi); | |
1841 | ||
1842 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1843 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1844 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, | |
1845 | CURRENT_TIME); | |
146bca72 | 1846 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); |
165923fa MS |
1847 | |
1848 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1849 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 1850 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
1851 | |
1852 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1853 | mark_buffer_dirty(bh); | |
146bca72 | 1854 | sbi->s_lvid_dirty = 0; |
949f4a7c | 1855 | mutex_unlock(&sbi->s_alloc_mutex); |
1da177e4 LT |
1856 | } |
1857 | ||
1858 | static void udf_close_lvid(struct super_block *sb) | |
1859 | { | |
6c79e987 MS |
1860 | struct udf_sb_info *sbi = UDF_SB(sb); |
1861 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1862 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 1863 | struct logicalVolIntegrityDescImpUse *lvidiu; |
28de7948 | 1864 | |
6c79e987 MS |
1865 | if (!bh) |
1866 | return; | |
1867 | ||
949f4a7c | 1868 | mutex_lock(&sbi->s_alloc_mutex); |
6c79e987 | 1869 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
165923fa MS |
1870 | lvidiu = udf_sb_lvidiu(sbi); |
1871 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1872 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1873 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); | |
1874 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) | |
1875 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
1876 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
1877 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
1878 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
1879 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
1880 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
1881 | ||
1882 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1883 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 1884 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
1885 | |
1886 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
853a0c25 JK |
1887 | /* |
1888 | * We set buffer uptodate unconditionally here to avoid spurious | |
1889 | * warnings from mark_buffer_dirty() when previous EIO has marked | |
1890 | * the buffer as !uptodate | |
1891 | */ | |
1892 | set_buffer_uptodate(bh); | |
165923fa | 1893 | mark_buffer_dirty(bh); |
146bca72 | 1894 | sbi->s_lvid_dirty = 0; |
949f4a7c | 1895 | mutex_unlock(&sbi->s_alloc_mutex); |
1da177e4 LT |
1896 | } |
1897 | ||
d664b6af JK |
1898 | u64 lvid_get_unique_id(struct super_block *sb) |
1899 | { | |
1900 | struct buffer_head *bh; | |
1901 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1902 | struct logicalVolIntegrityDesc *lvid; | |
1903 | struct logicalVolHeaderDesc *lvhd; | |
1904 | u64 uniqueID; | |
1905 | u64 ret; | |
1906 | ||
1907 | bh = sbi->s_lvid_bh; | |
1908 | if (!bh) | |
1909 | return 0; | |
1910 | ||
1911 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1912 | lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; | |
1913 | ||
1914 | mutex_lock(&sbi->s_alloc_mutex); | |
1915 | ret = uniqueID = le64_to_cpu(lvhd->uniqueID); | |
1916 | if (!(++uniqueID & 0xFFFFFFFF)) | |
1917 | uniqueID += 16; | |
1918 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
1919 | mutex_unlock(&sbi->s_alloc_mutex); | |
1920 | mark_buffer_dirty(bh); | |
1921 | ||
1922 | return ret; | |
1da177e4 LT |
1923 | } |
1924 | ||
1da177e4 LT |
1925 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
1926 | { | |
40346005 | 1927 | int ret; |
cb00ea35 | 1928 | struct inode *inode = NULL; |
1da177e4 | 1929 | struct udf_options uopt; |
5ca4e4be | 1930 | struct kernel_lb_addr rootdir, fileset; |
1da177e4 LT |
1931 | struct udf_sb_info *sbi; |
1932 | ||
1933 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
1934 | uopt.uid = -1; | |
1935 | uopt.gid = -1; | |
1936 | uopt.umask = 0; | |
87bc730c MS |
1937 | uopt.fmode = UDF_INVALID_MODE; |
1938 | uopt.dmode = UDF_INVALID_MODE; | |
1da177e4 | 1939 | |
6c79e987 | 1940 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
9db9f9e3 | 1941 | if (!sbi) |
1da177e4 | 1942 | return -ENOMEM; |
28de7948 | 1943 | |
1da177e4 | 1944 | sb->s_fs_info = sbi; |
1da177e4 | 1945 | |
1e7933de | 1946 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 1947 | |
6da80894 | 1948 | if (!udf_parse_options((char *)options, &uopt, false)) |
1da177e4 LT |
1949 | goto error_out; |
1950 | ||
1951 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 1952 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
8076c363 | 1953 | udf_err(sb, "utf8 cannot be combined with iocharset\n"); |
1da177e4 LT |
1954 | goto error_out; |
1955 | } | |
1956 | #ifdef CONFIG_UDF_NLS | |
cb00ea35 | 1957 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
1958 | uopt.nls_map = load_nls_default(); |
1959 | if (!uopt.nls_map) | |
1960 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
1961 | else | |
1962 | udf_debug("Using default NLS map\n"); | |
1963 | } | |
1964 | #endif | |
1965 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
1966 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
1967 | ||
1968 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
1969 | fileset.partitionReferenceNum = 0xFFFF; | |
1970 | ||
6c79e987 MS |
1971 | sbi->s_flags = uopt.flags; |
1972 | sbi->s_uid = uopt.uid; | |
1973 | sbi->s_gid = uopt.gid; | |
1974 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
1975 | sbi->s_fmode = uopt.fmode; |
1976 | sbi->s_dmode = uopt.dmode; | |
6c79e987 | 1977 | sbi->s_nls_map = uopt.nls_map; |
c03cad24 | 1978 | rwlock_init(&sbi->s_cred_lock); |
1da177e4 | 1979 | |
cb00ea35 | 1980 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 1981 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 1982 | else |
6c79e987 | 1983 | sbi->s_session = uopt.session; |
1da177e4 | 1984 | |
6c79e987 | 1985 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 1986 | |
40346005 JK |
1987 | /* Fill in the rest of the superblock */ |
1988 | sb->s_op = &udf_sb_ops; | |
1989 | sb->s_export_op = &udf_export_ops; | |
123e9caf | 1990 | |
40346005 JK |
1991 | sb->s_magic = UDF_SUPER_MAGIC; |
1992 | sb->s_time_gran = 1000; | |
1993 | ||
1197e4df | 1994 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { |
40346005 | 1995 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 1996 | } else { |
e1defc4f | 1997 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); |
40346005 JK |
1998 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1999 | if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { | |
1197e4df | 2000 | if (!silent) |
78ace70c JP |
2001 | pr_notice("Rescanning with blocksize %d\n", |
2002 | UDF_DEFAULT_BLOCKSIZE); | |
1197e4df | 2003 | uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; |
40346005 | 2004 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 2005 | } |
1da177e4 | 2006 | } |
40346005 | 2007 | if (!ret) { |
78ace70c | 2008 | udf_warn(sb, "No partition found (1)\n"); |
1da177e4 LT |
2009 | goto error_out; |
2010 | } | |
2011 | ||
6c79e987 | 2012 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
1da177e4 | 2013 | |
6c79e987 | 2014 | if (sbi->s_lvid_bh) { |
4b11111a MS |
2015 | struct logicalVolIntegrityDescImpUse *lvidiu = |
2016 | udf_sb_lvidiu(sbi); | |
6c79e987 MS |
2017 | uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); |
2018 | uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
4b11111a MS |
2019 | /* uint16_t maxUDFWriteRev = |
2020 | le16_to_cpu(lvidiu->maxUDFWriteRev); */ | |
1da177e4 | 2021 | |
cb00ea35 | 2022 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
78ace70c JP |
2023 | udf_err(sb, "minUDFReadRev=%x (max is %x)\n", |
2024 | le16_to_cpu(lvidiu->minUDFReadRev), | |
2025 | UDF_MAX_READ_VERSION); | |
1da177e4 | 2026 | goto error_out; |
4b11111a | 2027 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) |
1da177e4 | 2028 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 2029 | |
6c79e987 | 2030 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
2031 | |
2032 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
2033 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
2034 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
2035 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
2036 | } | |
2037 | ||
6c79e987 | 2038 | if (!sbi->s_partitions) { |
78ace70c | 2039 | udf_warn(sb, "No partition found (2)\n"); |
1da177e4 LT |
2040 | goto error_out; |
2041 | } | |
2042 | ||
4b11111a MS |
2043 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
2044 | UDF_PART_FLAG_READ_ONLY) { | |
78ace70c | 2045 | pr_notice("Partition marked readonly; forcing readonly mount\n"); |
39b3f6d6 | 2046 | sb->s_flags |= MS_RDONLY; |
c1a26e7d | 2047 | } |
39b3f6d6 | 2048 | |
cb00ea35 | 2049 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
78ace70c | 2050 | udf_warn(sb, "No fileset found\n"); |
1da177e4 LT |
2051 | goto error_out; |
2052 | } | |
2053 | ||
cb00ea35 | 2054 | if (!silent) { |
5ca4e4be | 2055 | struct timestamp ts; |
56774805 | 2056 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); |
78ace70c JP |
2057 | udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
2058 | sbi->s_volume_ident, | |
2059 | le16_to_cpu(ts.year), ts.month, ts.day, | |
56774805 | 2060 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); |
1da177e4 LT |
2061 | } |
2062 | if (!(sb->s_flags & MS_RDONLY)) | |
2063 | udf_open_lvid(sb); | |
2064 | ||
2065 | /* Assign the root inode */ | |
2066 | /* assign inodes by physical block number */ | |
2067 | /* perhaps it's not extensible enough, but for now ... */ | |
97e961fd | 2068 | inode = udf_iget(sb, &rootdir); |
cb00ea35 | 2069 | if (!inode) { |
78ace70c | 2070 | udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n", |
cb00ea35 | 2071 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
1da177e4 LT |
2072 | goto error_out; |
2073 | } | |
2074 | ||
2075 | /* Allocate a dentry for the root inode */ | |
48fde701 | 2076 | sb->s_root = d_make_root(inode); |
cb00ea35 | 2077 | if (!sb->s_root) { |
78ace70c | 2078 | udf_err(sb, "Couldn't allocate root dentry\n"); |
1da177e4 LT |
2079 | goto error_out; |
2080 | } | |
31170b6a | 2081 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
8de52778 | 2082 | sb->s_max_links = UDF_MAX_LINKS; |
1da177e4 LT |
2083 | return 0; |
2084 | ||
28de7948 | 2085 | error_out: |
6c79e987 MS |
2086 | if (sbi->s_vat_inode) |
2087 | iput(sbi->s_vat_inode); | |
1da177e4 LT |
2088 | #ifdef CONFIG_UDF_NLS |
2089 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2090 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2091 | #endif |
2092 | if (!(sb->s_flags & MS_RDONLY)) | |
2093 | udf_close_lvid(sb); | |
6c79e987 | 2094 | brelse(sbi->s_lvid_bh); |
bff943af | 2095 | udf_sb_free_partitions(sb); |
1da177e4 LT |
2096 | kfree(sbi); |
2097 | sb->s_fs_info = NULL; | |
28de7948 | 2098 | |
1da177e4 LT |
2099 | return -EINVAL; |
2100 | } | |
2101 | ||
8076c363 JP |
2102 | void _udf_err(struct super_block *sb, const char *function, |
2103 | const char *fmt, ...) | |
1da177e4 | 2104 | { |
c2bff36c | 2105 | struct va_format vaf; |
1da177e4 LT |
2106 | va_list args; |
2107 | ||
1da177e4 | 2108 | va_start(args, fmt); |
c2bff36c JP |
2109 | |
2110 | vaf.fmt = fmt; | |
2111 | vaf.va = &args; | |
2112 | ||
2113 | pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2114 | ||
1da177e4 | 2115 | va_end(args); |
1da177e4 LT |
2116 | } |
2117 | ||
a40ecd7b JP |
2118 | void _udf_warn(struct super_block *sb, const char *function, |
2119 | const char *fmt, ...) | |
1da177e4 | 2120 | { |
c2bff36c | 2121 | struct va_format vaf; |
1da177e4 LT |
2122 | va_list args; |
2123 | ||
cb00ea35 | 2124 | va_start(args, fmt); |
c2bff36c JP |
2125 | |
2126 | vaf.fmt = fmt; | |
2127 | vaf.va = &args; | |
2128 | ||
2129 | pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2130 | ||
1da177e4 | 2131 | va_end(args); |
1da177e4 LT |
2132 | } |
2133 | ||
cb00ea35 | 2134 | static void udf_put_super(struct super_block *sb) |
1da177e4 | 2135 | { |
6c79e987 | 2136 | struct udf_sb_info *sbi; |
1da177e4 | 2137 | |
6c79e987 | 2138 | sbi = UDF_SB(sb); |
6cfd0148 | 2139 | |
6c79e987 MS |
2140 | if (sbi->s_vat_inode) |
2141 | iput(sbi->s_vat_inode); | |
1da177e4 LT |
2142 | #ifdef CONFIG_UDF_NLS |
2143 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2144 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2145 | #endif |
2146 | if (!(sb->s_flags & MS_RDONLY)) | |
2147 | udf_close_lvid(sb); | |
6c79e987 | 2148 | brelse(sbi->s_lvid_bh); |
bff943af | 2149 | udf_sb_free_partitions(sb); |
1da177e4 LT |
2150 | kfree(sb->s_fs_info); |
2151 | sb->s_fs_info = NULL; | |
2152 | } | |
2153 | ||
146bca72 JK |
2154 | static int udf_sync_fs(struct super_block *sb, int wait) |
2155 | { | |
2156 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2157 | ||
2158 | mutex_lock(&sbi->s_alloc_mutex); | |
2159 | if (sbi->s_lvid_dirty) { | |
2160 | /* | |
2161 | * Blockdevice will be synced later so we don't have to submit | |
2162 | * the buffer for IO | |
2163 | */ | |
2164 | mark_buffer_dirty(sbi->s_lvid_bh); | |
146bca72 JK |
2165 | sbi->s_lvid_dirty = 0; |
2166 | } | |
2167 | mutex_unlock(&sbi->s_alloc_mutex); | |
2168 | ||
2169 | return 0; | |
2170 | } | |
2171 | ||
cb00ea35 | 2172 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2173 | { |
726c3342 | 2174 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
2175 | struct udf_sb_info *sbi = UDF_SB(sb); |
2176 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
557f5a14 | 2177 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
6c79e987 MS |
2178 | |
2179 | if (sbi->s_lvid_bh != NULL) | |
2180 | lvidiu = udf_sb_lvidiu(sbi); | |
2181 | else | |
2182 | lvidiu = NULL; | |
726c3342 | 2183 | |
1da177e4 LT |
2184 | buf->f_type = UDF_SUPER_MAGIC; |
2185 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 2186 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
2187 | buf->f_bfree = udf_count_free(sb); |
2188 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
2189 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
2190 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
2191 | + buf->f_bfree; | |
1da177e4 | 2192 | buf->f_ffree = buf->f_bfree; |
cb00ea35 | 2193 | buf->f_namelen = UDF_NAME_LEN - 2; |
557f5a14 CL |
2194 | buf->f_fsid.val[0] = (u32)id; |
2195 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
2196 | |
2197 | return 0; | |
2198 | } | |
2199 | ||
4b11111a MS |
2200 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
2201 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
2202 | { |
2203 | struct buffer_head *bh = NULL; | |
2204 | unsigned int accum = 0; | |
2205 | int index; | |
2206 | int block = 0, newblock; | |
5ca4e4be | 2207 | struct kernel_lb_addr loc; |
1da177e4 | 2208 | uint32_t bytes; |
1da177e4 LT |
2209 | uint8_t *ptr; |
2210 | uint16_t ident; | |
2211 | struct spaceBitmapDesc *bm; | |
2212 | ||
1da177e4 | 2213 | loc.logicalBlockNum = bitmap->s_extPosition; |
6c79e987 | 2214 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
97e961fd | 2215 | bh = udf_read_ptagged(sb, &loc, 0, &ident); |
1da177e4 | 2216 | |
cb00ea35 | 2217 | if (!bh) { |
78ace70c | 2218 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 | 2219 | goto out; |
cb00ea35 | 2220 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 2221 | brelse(bh); |
78ace70c | 2222 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 LT |
2223 | goto out; |
2224 | } | |
2225 | ||
2226 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2227 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
2228 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
2229 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 2230 | |
cb00ea35 | 2231 | while (bytes > 0) { |
01b954a3 MS |
2232 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
2233 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2234 | cur_bytes * 8); | |
2235 | bytes -= cur_bytes; | |
cb00ea35 | 2236 | if (bytes) { |
3bf25cb4 | 2237 | brelse(bh); |
97e961fd | 2238 | newblock = udf_get_lb_pblock(sb, &loc, ++block); |
1da177e4 | 2239 | bh = udf_tread(sb, newblock); |
cb00ea35 | 2240 | if (!bh) { |
1da177e4 LT |
2241 | udf_debug("read failed\n"); |
2242 | goto out; | |
2243 | } | |
2244 | index = 0; | |
28de7948 | 2245 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2246 | } |
2247 | } | |
3bf25cb4 | 2248 | brelse(bh); |
28de7948 | 2249 | out: |
1da177e4 LT |
2250 | return accum; |
2251 | } | |
2252 | ||
4b11111a MS |
2253 | static unsigned int udf_count_free_table(struct super_block *sb, |
2254 | struct inode *table) | |
1da177e4 LT |
2255 | { |
2256 | unsigned int accum = 0; | |
ff116fc8 | 2257 | uint32_t elen; |
5ca4e4be | 2258 | struct kernel_lb_addr eloc; |
1da177e4 | 2259 | int8_t etype; |
ff116fc8 | 2260 | struct extent_position epos; |
1da177e4 | 2261 | |
d1668fe3 | 2262 | mutex_lock(&UDF_SB(sb)->s_alloc_mutex); |
c0b34438 | 2263 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2264 | epos.offset = sizeof(struct unallocSpaceEntry); |
2265 | epos.bh = NULL; | |
1da177e4 | 2266 | |
3a71fc5d | 2267 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2268 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2269 | |
3bf25cb4 | 2270 | brelse(epos.bh); |
d1668fe3 | 2271 | mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); |
1da177e4 LT |
2272 | |
2273 | return accum; | |
2274 | } | |
cb00ea35 CG |
2275 | |
2276 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2277 | { |
2278 | unsigned int accum = 0; | |
6c79e987 MS |
2279 | struct udf_sb_info *sbi; |
2280 | struct udf_part_map *map; | |
1da177e4 | 2281 | |
6c79e987 MS |
2282 | sbi = UDF_SB(sb); |
2283 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2284 | struct logicalVolIntegrityDesc *lvid = |
2285 | (struct logicalVolIntegrityDesc *) | |
2286 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2287 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2288 | accum = le32_to_cpu( |
2289 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2290 | if (accum == 0xFFFFFFFF) |
2291 | accum = 0; | |
2292 | } | |
2293 | } | |
2294 | ||
2295 | if (accum) | |
2296 | return accum; | |
2297 | ||
6c79e987 MS |
2298 | map = &sbi->s_partmaps[sbi->s_partition]; |
2299 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2300 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2301 | map->s_uspace.s_bitmap); |
1da177e4 | 2302 | } |
6c79e987 | 2303 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
28de7948 | 2304 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2305 | map->s_fspace.s_bitmap); |
1da177e4 LT |
2306 | } |
2307 | if (accum) | |
2308 | return accum; | |
2309 | ||
6c79e987 | 2310 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2311 | accum += udf_count_free_table(sb, |
6c79e987 | 2312 | map->s_uspace.s_table); |
1da177e4 | 2313 | } |
6c79e987 | 2314 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
28de7948 | 2315 | accum += udf_count_free_table(sb, |
6c79e987 | 2316 | map->s_fspace.s_table); |
1da177e4 LT |
2317 | } |
2318 | ||
2319 | return accum; | |
2320 | } |