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Commit | Line | Data |
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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 | 120 | }; |
3e64fe5b | 121 | MODULE_ALIAS_FS("udf"); |
1da177e4 | 122 | |
cb00ea35 | 123 | static struct kmem_cache *udf_inode_cachep; |
1da177e4 LT |
124 | |
125 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
126 | { | |
127 | struct udf_inode_info *ei; | |
3a71fc5d | 128 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
129 | if (!ei) |
130 | return NULL; | |
95f8797f DB |
131 | |
132 | ei->i_unique = 0; | |
133 | ei->i_lenExtents = 0; | |
134 | ei->i_next_alloc_block = 0; | |
135 | ei->i_next_alloc_goal = 0; | |
136 | ei->i_strat4096 = 0; | |
4d0fb621 | 137 | init_rwsem(&ei->i_data_sem); |
99600051 NJ |
138 | ei->cached_extent.lstart = -1; |
139 | spin_lock_init(&ei->i_extent_cache_lock); | |
95f8797f | 140 | |
1da177e4 LT |
141 | return &ei->vfs_inode; |
142 | } | |
143 | ||
fa0d7e3d | 144 | static void udf_i_callback(struct rcu_head *head) |
1da177e4 | 145 | { |
fa0d7e3d | 146 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
147 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); |
148 | } | |
149 | ||
fa0d7e3d NP |
150 | static void udf_destroy_inode(struct inode *inode) |
151 | { | |
152 | call_rcu(&inode->i_rcu, udf_i_callback); | |
153 | } | |
154 | ||
51cc5068 | 155 | static void init_once(void *foo) |
1da177e4 | 156 | { |
cb00ea35 | 157 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 158 | |
a35afb83 CL |
159 | ei->i_ext.i_data = NULL; |
160 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
161 | } |
162 | ||
163 | static int init_inodecache(void) | |
164 | { | |
165 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
166 | sizeof(struct udf_inode_info), | |
cb00ea35 CG |
167 | 0, (SLAB_RECLAIM_ACCOUNT | |
168 | SLAB_MEM_SPREAD), | |
20c2df83 | 169 | init_once); |
28de7948 | 170 | if (!udf_inode_cachep) |
1da177e4 LT |
171 | return -ENOMEM; |
172 | return 0; | |
173 | } | |
174 | ||
175 | static void destroy_inodecache(void) | |
176 | { | |
8c0a8537 KS |
177 | /* |
178 | * Make sure all delayed rcu free inodes are flushed before we | |
179 | * destroy cache. | |
180 | */ | |
181 | rcu_barrier(); | |
1a1d92c1 | 182 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
183 | } |
184 | ||
185 | /* Superblock operations */ | |
ee9b6d61 | 186 | static const struct super_operations udf_sb_ops = { |
28de7948 CG |
187 | .alloc_inode = udf_alloc_inode, |
188 | .destroy_inode = udf_destroy_inode, | |
189 | .write_inode = udf_write_inode, | |
3aac2b62 | 190 | .evict_inode = udf_evict_inode, |
28de7948 | 191 | .put_super = udf_put_super, |
146bca72 | 192 | .sync_fs = udf_sync_fs, |
28de7948 CG |
193 | .statfs = udf_statfs, |
194 | .remount_fs = udf_remount_fs, | |
6da80894 | 195 | .show_options = udf_show_options, |
1da177e4 LT |
196 | }; |
197 | ||
cb00ea35 | 198 | struct udf_options { |
1da177e4 LT |
199 | unsigned char novrs; |
200 | unsigned int blocksize; | |
201 | unsigned int session; | |
202 | unsigned int lastblock; | |
203 | unsigned int anchor; | |
204 | unsigned int volume; | |
205 | unsigned short partition; | |
206 | unsigned int fileset; | |
207 | unsigned int rootdir; | |
208 | unsigned int flags; | |
faa17292 | 209 | umode_t umask; |
c2ba138a EB |
210 | kgid_t gid; |
211 | kuid_t uid; | |
faa17292 AV |
212 | umode_t fmode; |
213 | umode_t dmode; | |
1da177e4 LT |
214 | struct nls_table *nls_map; |
215 | }; | |
216 | ||
217 | static int __init init_udf_fs(void) | |
218 | { | |
219 | int err; | |
28de7948 | 220 | |
1da177e4 LT |
221 | err = init_inodecache(); |
222 | if (err) | |
223 | goto out1; | |
224 | err = register_filesystem(&udf_fstype); | |
225 | if (err) | |
226 | goto out; | |
28de7948 | 227 | |
1da177e4 | 228 | return 0; |
28de7948 CG |
229 | |
230 | out: | |
1da177e4 | 231 | destroy_inodecache(); |
28de7948 CG |
232 | |
233 | out1: | |
1da177e4 LT |
234 | return err; |
235 | } | |
236 | ||
237 | static void __exit exit_udf_fs(void) | |
238 | { | |
239 | unregister_filesystem(&udf_fstype); | |
240 | destroy_inodecache(); | |
241 | } | |
242 | ||
243 | module_init(init_udf_fs) | |
28de7948 | 244 | module_exit(exit_udf_fs) |
1da177e4 | 245 | |
dc5d39be MS |
246 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
247 | { | |
248 | struct udf_sb_info *sbi = UDF_SB(sb); | |
249 | ||
250 | sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), | |
251 | GFP_KERNEL); | |
252 | if (!sbi->s_partmaps) { | |
8076c363 JP |
253 | udf_err(sb, "Unable to allocate space for %d partition maps\n", |
254 | count); | |
dc5d39be MS |
255 | sbi->s_partitions = 0; |
256 | return -ENOMEM; | |
257 | } | |
258 | ||
259 | sbi->s_partitions = count; | |
260 | return 0; | |
261 | } | |
262 | ||
bff943af JK |
263 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
264 | { | |
265 | int i; | |
266 | int nr_groups = bitmap->s_nr_groups; | |
267 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * | |
268 | nr_groups); | |
269 | ||
270 | for (i = 0; i < nr_groups; i++) | |
271 | if (bitmap->s_block_bitmap[i]) | |
272 | brelse(bitmap->s_block_bitmap[i]); | |
273 | ||
274 | if (size <= PAGE_SIZE) | |
275 | kfree(bitmap); | |
276 | else | |
277 | vfree(bitmap); | |
278 | } | |
279 | ||
280 | static void udf_free_partition(struct udf_part_map *map) | |
281 | { | |
282 | int i; | |
283 | struct udf_meta_data *mdata; | |
284 | ||
285 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
286 | iput(map->s_uspace.s_table); | |
287 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
288 | iput(map->s_fspace.s_table); | |
289 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
290 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
291 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) | |
292 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); | |
293 | if (map->s_partition_type == UDF_SPARABLE_MAP15) | |
294 | for (i = 0; i < 4; i++) | |
295 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
296 | else if (map->s_partition_type == UDF_METADATA_MAP25) { | |
297 | mdata = &map->s_type_specific.s_metadata; | |
298 | iput(mdata->s_metadata_fe); | |
299 | mdata->s_metadata_fe = NULL; | |
300 | ||
301 | iput(mdata->s_mirror_fe); | |
302 | mdata->s_mirror_fe = NULL; | |
303 | ||
304 | iput(mdata->s_bitmap_fe); | |
305 | mdata->s_bitmap_fe = NULL; | |
306 | } | |
307 | } | |
308 | ||
309 | static void udf_sb_free_partitions(struct super_block *sb) | |
310 | { | |
311 | struct udf_sb_info *sbi = UDF_SB(sb); | |
312 | int i; | |
1b1baff6 NJ |
313 | if (sbi->s_partmaps == NULL) |
314 | return; | |
bff943af JK |
315 | for (i = 0; i < sbi->s_partitions; i++) |
316 | udf_free_partition(&sbi->s_partmaps[i]); | |
317 | kfree(sbi->s_partmaps); | |
318 | sbi->s_partmaps = NULL; | |
319 | } | |
320 | ||
34c80b1d | 321 | static int udf_show_options(struct seq_file *seq, struct dentry *root) |
6da80894 | 322 | { |
34c80b1d | 323 | struct super_block *sb = root->d_sb; |
6da80894 MS |
324 | struct udf_sb_info *sbi = UDF_SB(sb); |
325 | ||
326 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
327 | seq_puts(seq, ",nostrict"); | |
1197e4df | 328 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) |
6da80894 MS |
329 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); |
330 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
331 | seq_puts(seq, ",unhide"); | |
332 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
333 | seq_puts(seq, ",undelete"); | |
334 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
335 | seq_puts(seq, ",noadinicb"); | |
336 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
337 | seq_puts(seq, ",shortad"); | |
338 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
339 | seq_puts(seq, ",uid=forget"); | |
340 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) | |
341 | seq_puts(seq, ",uid=ignore"); | |
342 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) | |
343 | seq_puts(seq, ",gid=forget"); | |
344 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) | |
345 | seq_puts(seq, ",gid=ignore"); | |
346 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) | |
c2ba138a | 347 | seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid)); |
6da80894 | 348 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) |
c2ba138a | 349 | seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid)); |
6da80894 | 350 | if (sbi->s_umask != 0) |
faa17292 | 351 | seq_printf(seq, ",umask=%ho", sbi->s_umask); |
87bc730c | 352 | if (sbi->s_fmode != UDF_INVALID_MODE) |
faa17292 | 353 | seq_printf(seq, ",mode=%ho", sbi->s_fmode); |
87bc730c | 354 | if (sbi->s_dmode != UDF_INVALID_MODE) |
faa17292 | 355 | seq_printf(seq, ",dmode=%ho", sbi->s_dmode); |
6da80894 MS |
356 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) |
357 | seq_printf(seq, ",session=%u", sbi->s_session); | |
358 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) | |
359 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
40346005 JK |
360 | if (sbi->s_anchor != 0) |
361 | seq_printf(seq, ",anchor=%u", sbi->s_anchor); | |
6da80894 MS |
362 | /* |
363 | * volume, partition, fileset and rootdir seem to be ignored | |
364 | * currently | |
365 | */ | |
366 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) | |
367 | seq_puts(seq, ",utf8"); | |
368 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
369 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
1da177e4 LT |
374 | /* |
375 | * udf_parse_options | |
376 | * | |
377 | * PURPOSE | |
378 | * Parse mount options. | |
379 | * | |
380 | * DESCRIPTION | |
381 | * The following mount options are supported: | |
382 | * | |
383 | * gid= Set the default group. | |
384 | * umask= Set the default umask. | |
7ac9bcd5 MS |
385 | * mode= Set the default file permissions. |
386 | * dmode= Set the default directory permissions. | |
1da177e4 LT |
387 | * uid= Set the default user. |
388 | * bs= Set the block size. | |
389 | * unhide Show otherwise hidden files. | |
390 | * undelete Show deleted files in lists. | |
391 | * adinicb Embed data in the inode (default) | |
392 | * noadinicb Don't embed data in the inode | |
393 | * shortad Use short ad's | |
394 | * longad Use long ad's (default) | |
395 | * nostrict Unset strict conformance | |
396 | * iocharset= Set the NLS character set | |
397 | * | |
398 | * The remaining are for debugging and disaster recovery: | |
399 | * | |
28de7948 | 400 | * novrs Skip volume sequence recognition |
1da177e4 LT |
401 | * |
402 | * The following expect a offset from 0. | |
403 | * | |
404 | * session= Set the CDROM session (default= last session) | |
405 | * anchor= Override standard anchor location. (default= 256) | |
406 | * volume= Override the VolumeDesc location. (unused) | |
407 | * partition= Override the PartitionDesc location. (unused) | |
408 | * lastblock= Set the last block of the filesystem/ | |
409 | * | |
410 | * The following expect a offset from the partition root. | |
411 | * | |
412 | * fileset= Override the fileset block location. (unused) | |
413 | * rootdir= Override the root directory location. (unused) | |
414 | * WARNING: overriding the rootdir to a non-directory may | |
415 | * yield highly unpredictable results. | |
416 | * | |
417 | * PRE-CONDITIONS | |
418 | * options Pointer to mount options string. | |
419 | * uopts Pointer to mount options variable. | |
420 | * | |
421 | * POST-CONDITIONS | |
422 | * <return> 1 Mount options parsed okay. | |
423 | * <return> 0 Error parsing mount options. | |
424 | * | |
425 | * HISTORY | |
426 | * July 1, 1997 - Andrew E. Mileski | |
427 | * Written, tested, and released. | |
428 | */ | |
28de7948 | 429 | |
1da177e4 LT |
430 | enum { |
431 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
432 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
433 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
434 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
435 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
7ac9bcd5 MS |
436 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, |
437 | Opt_fmode, Opt_dmode | |
1da177e4 LT |
438 | }; |
439 | ||
a447c093 | 440 | static const match_table_t tokens = { |
28de7948 CG |
441 | {Opt_novrs, "novrs"}, |
442 | {Opt_nostrict, "nostrict"}, | |
443 | {Opt_bs, "bs=%u"}, | |
444 | {Opt_unhide, "unhide"}, | |
445 | {Opt_undelete, "undelete"}, | |
446 | {Opt_noadinicb, "noadinicb"}, | |
447 | {Opt_adinicb, "adinicb"}, | |
448 | {Opt_shortad, "shortad"}, | |
449 | {Opt_longad, "longad"}, | |
450 | {Opt_uforget, "uid=forget"}, | |
451 | {Opt_uignore, "uid=ignore"}, | |
452 | {Opt_gforget, "gid=forget"}, | |
453 | {Opt_gignore, "gid=ignore"}, | |
454 | {Opt_gid, "gid=%u"}, | |
455 | {Opt_uid, "uid=%u"}, | |
456 | {Opt_umask, "umask=%o"}, | |
457 | {Opt_session, "session=%u"}, | |
458 | {Opt_lastblock, "lastblock=%u"}, | |
459 | {Opt_anchor, "anchor=%u"}, | |
460 | {Opt_volume, "volume=%u"}, | |
461 | {Opt_partition, "partition=%u"}, | |
462 | {Opt_fileset, "fileset=%u"}, | |
463 | {Opt_rootdir, "rootdir=%u"}, | |
464 | {Opt_utf8, "utf8"}, | |
465 | {Opt_iocharset, "iocharset=%s"}, | |
7ac9bcd5 MS |
466 | {Opt_fmode, "mode=%o"}, |
467 | {Opt_dmode, "dmode=%o"}, | |
28de7948 | 468 | {Opt_err, NULL} |
1da177e4 LT |
469 | }; |
470 | ||
6da80894 MS |
471 | static int udf_parse_options(char *options, struct udf_options *uopt, |
472 | bool remount) | |
1da177e4 LT |
473 | { |
474 | char *p; | |
475 | int option; | |
476 | ||
477 | uopt->novrs = 0; | |
1da177e4 LT |
478 | uopt->partition = 0xFFFF; |
479 | uopt->session = 0xFFFFFFFF; | |
480 | uopt->lastblock = 0; | |
481 | uopt->anchor = 0; | |
482 | uopt->volume = 0xFFFFFFFF; | |
483 | uopt->rootdir = 0xFFFFFFFF; | |
484 | uopt->fileset = 0xFFFFFFFF; | |
485 | uopt->nls_map = NULL; | |
486 | ||
487 | if (!options) | |
488 | return 1; | |
489 | ||
cb00ea35 | 490 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
491 | substring_t args[MAX_OPT_ARGS]; |
492 | int token; | |
493 | if (!*p) | |
494 | continue; | |
495 | ||
496 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
497 | switch (token) { |
498 | case Opt_novrs: | |
499 | uopt->novrs = 1; | |
4136801a | 500 | break; |
cb00ea35 CG |
501 | case Opt_bs: |
502 | if (match_int(&args[0], &option)) | |
503 | return 0; | |
504 | uopt->blocksize = option; | |
1197e4df | 505 | uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); |
cb00ea35 CG |
506 | break; |
507 | case Opt_unhide: | |
508 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
509 | break; | |
510 | case Opt_undelete: | |
511 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
512 | break; | |
513 | case Opt_noadinicb: | |
514 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
515 | break; | |
516 | case Opt_adinicb: | |
517 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
518 | break; | |
519 | case Opt_shortad: | |
520 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
521 | break; | |
522 | case Opt_longad: | |
523 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
524 | break; | |
525 | case Opt_gid: | |
526 | if (match_int(args, &option)) | |
527 | return 0; | |
c2ba138a EB |
528 | uopt->gid = make_kgid(current_user_ns(), option); |
529 | if (!gid_valid(uopt->gid)) | |
530 | return 0; | |
ca76d2d8 | 531 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
532 | break; |
533 | case Opt_uid: | |
534 | if (match_int(args, &option)) | |
535 | return 0; | |
c2ba138a EB |
536 | uopt->uid = make_kuid(current_user_ns(), option); |
537 | if (!uid_valid(uopt->uid)) | |
538 | return 0; | |
ca76d2d8 | 539 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
540 | break; |
541 | case Opt_umask: | |
542 | if (match_octal(args, &option)) | |
543 | return 0; | |
544 | uopt->umask = option; | |
545 | break; | |
546 | case Opt_nostrict: | |
547 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
548 | break; | |
549 | case Opt_session: | |
550 | if (match_int(args, &option)) | |
551 | return 0; | |
552 | uopt->session = option; | |
6da80894 MS |
553 | if (!remount) |
554 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
555 | break; |
556 | case Opt_lastblock: | |
557 | if (match_int(args, &option)) | |
558 | return 0; | |
559 | uopt->lastblock = option; | |
6da80894 MS |
560 | if (!remount) |
561 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
562 | break; |
563 | case Opt_anchor: | |
564 | if (match_int(args, &option)) | |
565 | return 0; | |
566 | uopt->anchor = option; | |
567 | break; | |
568 | case Opt_volume: | |
569 | if (match_int(args, &option)) | |
570 | return 0; | |
571 | uopt->volume = option; | |
572 | break; | |
573 | case Opt_partition: | |
574 | if (match_int(args, &option)) | |
575 | return 0; | |
576 | uopt->partition = option; | |
577 | break; | |
578 | case Opt_fileset: | |
579 | if (match_int(args, &option)) | |
580 | return 0; | |
581 | uopt->fileset = option; | |
582 | break; | |
583 | case Opt_rootdir: | |
584 | if (match_int(args, &option)) | |
585 | return 0; | |
586 | uopt->rootdir = option; | |
587 | break; | |
588 | case Opt_utf8: | |
589 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
590 | break; | |
1da177e4 | 591 | #ifdef CONFIG_UDF_NLS |
cb00ea35 CG |
592 | case Opt_iocharset: |
593 | uopt->nls_map = load_nls(args[0].from); | |
594 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
595 | break; | |
1da177e4 | 596 | #endif |
cb00ea35 CG |
597 | case Opt_uignore: |
598 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); | |
599 | break; | |
600 | case Opt_uforget: | |
601 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
602 | break; | |
603 | case Opt_gignore: | |
604 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); | |
605 | break; | |
606 | case Opt_gforget: | |
607 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
608 | break; | |
7ac9bcd5 MS |
609 | case Opt_fmode: |
610 | if (match_octal(args, &option)) | |
611 | return 0; | |
612 | uopt->fmode = option & 0777; | |
613 | break; | |
614 | case Opt_dmode: | |
615 | if (match_octal(args, &option)) | |
616 | return 0; | |
617 | uopt->dmode = option & 0777; | |
618 | break; | |
cb00ea35 | 619 | default: |
78ace70c | 620 | pr_err("bad mount option \"%s\" or missing value\n", p); |
1da177e4 LT |
621 | return 0; |
622 | } | |
623 | } | |
624 | return 1; | |
625 | } | |
626 | ||
cb00ea35 | 627 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
628 | { |
629 | struct udf_options uopt; | |
6c79e987 | 630 | struct udf_sb_info *sbi = UDF_SB(sb); |
c79d967d | 631 | int error = 0; |
1da177e4 | 632 | |
6c79e987 MS |
633 | uopt.flags = sbi->s_flags; |
634 | uopt.uid = sbi->s_uid; | |
635 | uopt.gid = sbi->s_gid; | |
636 | uopt.umask = sbi->s_umask; | |
7ac9bcd5 MS |
637 | uopt.fmode = sbi->s_fmode; |
638 | uopt.dmode = sbi->s_dmode; | |
1da177e4 | 639 | |
6da80894 | 640 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
641 | return -EINVAL; |
642 | ||
c03cad24 | 643 | write_lock(&sbi->s_cred_lock); |
6c79e987 MS |
644 | sbi->s_flags = uopt.flags; |
645 | sbi->s_uid = uopt.uid; | |
646 | sbi->s_gid = uopt.gid; | |
647 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
648 | sbi->s_fmode = uopt.fmode; |
649 | sbi->s_dmode = uopt.dmode; | |
c03cad24 | 650 | write_unlock(&sbi->s_cred_lock); |
1da177e4 | 651 | |
6c79e987 MS |
652 | if (sbi->s_lvid_bh) { |
653 | int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); | |
1da177e4 LT |
654 | if (write_rev > UDF_MAX_WRITE_VERSION) |
655 | *flags |= MS_RDONLY; | |
656 | } | |
657 | ||
c79d967d CH |
658 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
659 | goto out_unlock; | |
660 | ||
36350462 | 661 | if (*flags & MS_RDONLY) |
1da177e4 | 662 | udf_close_lvid(sb); |
36350462 | 663 | else |
1da177e4 LT |
664 | udf_open_lvid(sb); |
665 | ||
c79d967d | 666 | out_unlock: |
c79d967d | 667 | return error; |
1da177e4 LT |
668 | } |
669 | ||
40346005 JK |
670 | /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ |
671 | /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
672 | static loff_t udf_check_vsd(struct super_block *sb) | |
1da177e4 LT |
673 | { |
674 | struct volStructDesc *vsd = NULL; | |
f4bcbbd9 | 675 | loff_t sector = 32768; |
1da177e4 LT |
676 | int sectorsize; |
677 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
678 | int nsr02 = 0; |
679 | int nsr03 = 0; | |
6c79e987 | 680 | struct udf_sb_info *sbi; |
1da177e4 | 681 | |
6c79e987 | 682 | sbi = UDF_SB(sb); |
1da177e4 LT |
683 | if (sb->s_blocksize < sizeof(struct volStructDesc)) |
684 | sectorsize = sizeof(struct volStructDesc); | |
685 | else | |
686 | sectorsize = sb->s_blocksize; | |
687 | ||
6c79e987 | 688 | sector += (sbi->s_session << sb->s_blocksize_bits); |
1da177e4 LT |
689 | |
690 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
706047a7 SM |
691 | (unsigned int)(sector >> sb->s_blocksize_bits), |
692 | sb->s_blocksize); | |
1da177e4 | 693 | /* Process the sequence (if applicable) */ |
cb00ea35 | 694 | for (; !nsr02 && !nsr03; sector += sectorsize) { |
1da177e4 LT |
695 | /* Read a block */ |
696 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
697 | if (!bh) | |
698 | break; | |
699 | ||
700 | /* Look for ISO descriptors */ | |
701 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 702 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 703 | |
cb00ea35 | 704 | if (vsd->stdIdent[0] == 0) { |
3bf25cb4 | 705 | brelse(bh); |
1da177e4 | 706 | break; |
3a71fc5d MS |
707 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
708 | VSD_STD_ID_LEN)) { | |
cb00ea35 CG |
709 | switch (vsd->structType) { |
710 | case 0: | |
711 | udf_debug("ISO9660 Boot Record found\n"); | |
712 | break; | |
713 | case 1: | |
a983f368 | 714 | udf_debug("ISO9660 Primary Volume Descriptor found\n"); |
cb00ea35 CG |
715 | break; |
716 | case 2: | |
a983f368 | 717 | udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); |
cb00ea35 CG |
718 | break; |
719 | case 3: | |
a983f368 | 720 | udf_debug("ISO9660 Volume Partition Descriptor found\n"); |
cb00ea35 CG |
721 | break; |
722 | case 255: | |
a983f368 | 723 | udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); |
cb00ea35 CG |
724 | break; |
725 | default: | |
726 | udf_debug("ISO9660 VRS (%u) found\n", | |
727 | vsd->structType); | |
728 | break; | |
1da177e4 | 729 | } |
3a71fc5d MS |
730 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
731 | VSD_STD_ID_LEN)) | |
732 | ; /* nothing */ | |
733 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
734 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 735 | brelse(bh); |
1da177e4 | 736 | break; |
3a71fc5d MS |
737 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
738 | VSD_STD_ID_LEN)) | |
1da177e4 | 739 | nsr02 = sector; |
3a71fc5d MS |
740 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
741 | VSD_STD_ID_LEN)) | |
1da177e4 | 742 | nsr03 = sector; |
3bf25cb4 | 743 | brelse(bh); |
1da177e4 LT |
744 | } |
745 | ||
746 | if (nsr03) | |
747 | return nsr03; | |
748 | else if (nsr02) | |
749 | return nsr02; | |
6c79e987 | 750 | else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) |
1da177e4 LT |
751 | return -1; |
752 | else | |
753 | return 0; | |
754 | } | |
755 | ||
3a71fc5d | 756 | static int udf_find_fileset(struct super_block *sb, |
5ca4e4be PE |
757 | struct kernel_lb_addr *fileset, |
758 | struct kernel_lb_addr *root) | |
1da177e4 LT |
759 | { |
760 | struct buffer_head *bh = NULL; | |
761 | long lastblock; | |
762 | uint16_t ident; | |
6c79e987 | 763 | struct udf_sb_info *sbi; |
1da177e4 LT |
764 | |
765 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 766 | fileset->partitionReferenceNum != 0xFFFF) { |
97e961fd | 767 | bh = udf_read_ptagged(sb, fileset, 0, &ident); |
1da177e4 | 768 | |
28de7948 | 769 | if (!bh) { |
1da177e4 | 770 | return 1; |
28de7948 | 771 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 772 | brelse(bh); |
1da177e4 LT |
773 | return 1; |
774 | } | |
cb00ea35 | 775 | |
1da177e4 LT |
776 | } |
777 | ||
6c79e987 | 778 | sbi = UDF_SB(sb); |
3a71fc5d MS |
779 | if (!bh) { |
780 | /* Search backwards through the partitions */ | |
5ca4e4be | 781 | struct kernel_lb_addr newfileset; |
1da177e4 | 782 | |
28de7948 | 783 | /* --> cvg: FIXME - is it reasonable? */ |
1da177e4 | 784 | return 1; |
cb00ea35 | 785 | |
6c79e987 | 786 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
cb00ea35 CG |
787 | (newfileset.partitionReferenceNum != 0xFFFF && |
788 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
789 | fileset->partitionReferenceNum == 0xFFFF); | |
790 | newfileset.partitionReferenceNum--) { | |
6c79e987 MS |
791 | lastblock = sbi->s_partmaps |
792 | [newfileset.partitionReferenceNum] | |
793 | .s_partition_len; | |
1da177e4 LT |
794 | newfileset.logicalBlockNum = 0; |
795 | ||
cb00ea35 | 796 | do { |
97e961fd | 797 | bh = udf_read_ptagged(sb, &newfileset, 0, |
3a71fc5d | 798 | &ident); |
cb00ea35 CG |
799 | if (!bh) { |
800 | newfileset.logicalBlockNum++; | |
1da177e4 LT |
801 | continue; |
802 | } | |
803 | ||
cb00ea35 CG |
804 | switch (ident) { |
805 | case TAG_IDENT_SBD: | |
28de7948 CG |
806 | { |
807 | struct spaceBitmapDesc *sp; | |
4b11111a MS |
808 | sp = (struct spaceBitmapDesc *) |
809 | bh->b_data; | |
28de7948 CG |
810 | newfileset.logicalBlockNum += 1 + |
811 | ((le32_to_cpu(sp->numOfBytes) + | |
4b11111a MS |
812 | sizeof(struct spaceBitmapDesc) |
813 | - 1) >> sb->s_blocksize_bits); | |
28de7948 CG |
814 | brelse(bh); |
815 | break; | |
816 | } | |
cb00ea35 | 817 | case TAG_IDENT_FSD: |
28de7948 CG |
818 | *fileset = newfileset; |
819 | break; | |
cb00ea35 | 820 | default: |
28de7948 CG |
821 | newfileset.logicalBlockNum++; |
822 | brelse(bh); | |
823 | bh = NULL; | |
824 | break; | |
1da177e4 | 825 | } |
28de7948 CG |
826 | } while (newfileset.logicalBlockNum < lastblock && |
827 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
828 | fileset->partitionReferenceNum == 0xFFFF); | |
1da177e4 LT |
829 | } |
830 | } | |
831 | ||
832 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 833 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
1da177e4 | 834 | udf_debug("Fileset at block=%d, partition=%d\n", |
cb00ea35 CG |
835 | fileset->logicalBlockNum, |
836 | fileset->partitionReferenceNum); | |
1da177e4 | 837 | |
6c79e987 | 838 | sbi->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 839 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 840 | brelse(bh); |
1da177e4 LT |
841 | return 0; |
842 | } | |
843 | return 1; | |
844 | } | |
845 | ||
d759bfa4 JK |
846 | /* |
847 | * Load primary Volume Descriptor Sequence | |
848 | * | |
849 | * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence | |
850 | * should be tried. | |
851 | */ | |
c0eb31ed | 852 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
853 | { |
854 | struct primaryVolDesc *pvoldesc; | |
ba9aadd8 | 855 | struct ustr *instr, *outstr; |
c0eb31ed JK |
856 | struct buffer_head *bh; |
857 | uint16_t ident; | |
d759bfa4 | 858 | int ret = -ENOMEM; |
ba9aadd8 MS |
859 | |
860 | instr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
861 | if (!instr) | |
d759bfa4 | 862 | return -ENOMEM; |
ba9aadd8 MS |
863 | |
864 | outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
865 | if (!outstr) | |
866 | goto out1; | |
c0eb31ed JK |
867 | |
868 | bh = udf_read_tagged(sb, block, block, &ident); | |
d759bfa4 JK |
869 | if (!bh) { |
870 | ret = -EAGAIN; | |
ba9aadd8 | 871 | goto out2; |
d759bfa4 | 872 | } |
ba9aadd8 | 873 | |
d759bfa4 JK |
874 | if (ident != TAG_IDENT_PVD) { |
875 | ret = -EIO; | |
876 | goto out_bh; | |
877 | } | |
1da177e4 LT |
878 | |
879 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
880 | ||
56774805 MS |
881 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
882 | pvoldesc->recordingDateAndTime)) { | |
af15a298 | 883 | #ifdef UDFFS_DEBUG |
5ca4e4be | 884 | struct timestamp *ts = &pvoldesc->recordingDateAndTime; |
a983f368 | 885 | udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", |
af15a298 MS |
886 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, |
887 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
888 | #endif | |
1da177e4 LT |
889 | } |
890 | ||
ba9aadd8 MS |
891 | if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) |
892 | if (udf_CS0toUTF8(outstr, instr)) { | |
893 | strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, | |
894 | outstr->u_len > 31 ? 31 : outstr->u_len); | |
4b11111a | 895 | udf_debug("volIdent[] = '%s'\n", |
a983f368 | 896 | UDF_SB(sb)->s_volume_ident); |
1da177e4 | 897 | } |
1da177e4 | 898 | |
ba9aadd8 MS |
899 | if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) |
900 | if (udf_CS0toUTF8(outstr, instr)) | |
901 | udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); | |
c0eb31ed | 902 | |
ba9aadd8 | 903 | ret = 0; |
d759bfa4 JK |
904 | out_bh: |
905 | brelse(bh); | |
ba9aadd8 MS |
906 | out2: |
907 | kfree(outstr); | |
908 | out1: | |
909 | kfree(instr); | |
910 | return ret; | |
1da177e4 LT |
911 | } |
912 | ||
3080a74e NJ |
913 | struct inode *udf_find_metadata_inode_efe(struct super_block *sb, |
914 | u32 meta_file_loc, u32 partition_num) | |
915 | { | |
916 | struct kernel_lb_addr addr; | |
917 | struct inode *metadata_fe; | |
918 | ||
919 | addr.logicalBlockNum = meta_file_loc; | |
920 | addr.partitionReferenceNum = partition_num; | |
921 | ||
922 | metadata_fe = udf_iget(sb, &addr); | |
923 | ||
924 | if (metadata_fe == NULL) | |
925 | udf_warn(sb, "metadata inode efe not found\n"); | |
926 | else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { | |
927 | udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); | |
928 | iput(metadata_fe); | |
929 | metadata_fe = NULL; | |
930 | } | |
931 | ||
932 | return metadata_fe; | |
933 | } | |
934 | ||
bfb257a5 JK |
935 | static int udf_load_metadata_files(struct super_block *sb, int partition) |
936 | { | |
937 | struct udf_sb_info *sbi = UDF_SB(sb); | |
938 | struct udf_part_map *map; | |
939 | struct udf_meta_data *mdata; | |
5ca4e4be | 940 | struct kernel_lb_addr addr; |
bfb257a5 JK |
941 | |
942 | map = &sbi->s_partmaps[partition]; | |
943 | mdata = &map->s_type_specific.s_metadata; | |
944 | ||
945 | /* metadata address */ | |
bfb257a5 | 946 | udf_debug("Metadata file location: block = %d part = %d\n", |
3080a74e | 947 | mdata->s_meta_file_loc, map->s_partition_num); |
bfb257a5 | 948 | |
3080a74e NJ |
949 | mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb, |
950 | mdata->s_meta_file_loc, map->s_partition_num); | |
bfb257a5 JK |
951 | |
952 | if (mdata->s_metadata_fe == NULL) { | |
3080a74e NJ |
953 | /* mirror file entry */ |
954 | udf_debug("Mirror metadata file location: block = %d part = %d\n", | |
955 | mdata->s_mirror_file_loc, map->s_partition_num); | |
bfb257a5 | 956 | |
3080a74e NJ |
957 | mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb, |
958 | mdata->s_mirror_file_loc, map->s_partition_num); | |
bfb257a5 | 959 | |
3080a74e NJ |
960 | if (mdata->s_mirror_fe == NULL) { |
961 | udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); | |
d759bfa4 | 962 | return -EIO; |
3080a74e | 963 | } |
bfb257a5 JK |
964 | } |
965 | ||
966 | /* | |
967 | * bitmap file entry | |
968 | * Note: | |
969 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) | |
970 | */ | |
971 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { | |
972 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; | |
973 | addr.partitionReferenceNum = map->s_partition_num; | |
974 | ||
975 | udf_debug("Bitmap file location: block = %d part = %d\n", | |
a983f368 | 976 | addr.logicalBlockNum, addr.partitionReferenceNum); |
bfb257a5 | 977 | |
97e961fd | 978 | mdata->s_bitmap_fe = udf_iget(sb, &addr); |
bfb257a5 JK |
979 | if (mdata->s_bitmap_fe == NULL) { |
980 | if (sb->s_flags & MS_RDONLY) | |
a40ecd7b | 981 | udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); |
bfb257a5 | 982 | else { |
8076c363 | 983 | udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); |
d759bfa4 | 984 | return -EIO; |
bfb257a5 JK |
985 | } |
986 | } | |
987 | } | |
988 | ||
989 | udf_debug("udf_load_metadata_files Ok\n"); | |
bfb257a5 | 990 | return 0; |
bfb257a5 JK |
991 | } |
992 | ||
28de7948 | 993 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
5ca4e4be | 994 | struct kernel_lb_addr *root) |
1da177e4 LT |
995 | { |
996 | struct fileSetDesc *fset; | |
997 | ||
998 | fset = (struct fileSetDesc *)bh->b_data; | |
999 | ||
1000 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
1001 | ||
6c79e987 | 1002 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 1003 | |
cb00ea35 CG |
1004 | udf_debug("Rootdir at block=%d, partition=%d\n", |
1005 | root->logicalBlockNum, root->partitionReferenceNum); | |
1da177e4 LT |
1006 | } |
1007 | ||
883cb9d1 MS |
1008 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
1009 | { | |
1010 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
1011 | return DIV_ROUND_UP(map->s_partition_len + |
1012 | (sizeof(struct spaceBitmapDesc) << 3), | |
1013 | sb->s_blocksize * 8); | |
883cb9d1 MS |
1014 | } |
1015 | ||
66e1da3f MS |
1016 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
1017 | { | |
66e1da3f MS |
1018 | struct udf_bitmap *bitmap; |
1019 | int nr_groups; | |
1020 | int size; | |
1021 | ||
883cb9d1 | 1022 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
1023 | size = sizeof(struct udf_bitmap) + |
1024 | (sizeof(struct buffer_head *) * nr_groups); | |
1025 | ||
1026 | if (size <= PAGE_SIZE) | |
ed2ae6f6 | 1027 | bitmap = kzalloc(size, GFP_KERNEL); |
66e1da3f | 1028 | else |
ed2ae6f6 | 1029 | bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ |
66e1da3f | 1030 | |
75b09e02 | 1031 | if (bitmap == NULL) |
66e1da3f | 1032 | return NULL; |
66e1da3f | 1033 | |
66e1da3f MS |
1034 | bitmap->s_nr_groups = nr_groups; |
1035 | return bitmap; | |
1036 | } | |
1037 | ||
3fb38dfa JK |
1038 | static int udf_fill_partdesc_info(struct super_block *sb, |
1039 | struct partitionDesc *p, int p_index) | |
1da177e4 | 1040 | { |
6c79e987 | 1041 | struct udf_part_map *map; |
165923fa | 1042 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 1043 | struct partitionHeaderDesc *phd; |
165923fa | 1044 | |
3fb38dfa | 1045 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
1046 | |
1047 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
1048 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
1049 | ||
1050 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
1051 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
1052 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
1053 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
1054 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
1055 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
1056 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
1057 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
1058 | ||
a983f368 JP |
1059 | udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n", |
1060 | p_index, map->s_partition_type, | |
1061 | map->s_partition_root, map->s_partition_len); | |
165923fa MS |
1062 | |
1063 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
1064 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
3fb38dfa | 1065 | return 0; |
165923fa MS |
1066 | |
1067 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1068 | if (phd->unallocSpaceTable.extLength) { | |
5ca4e4be | 1069 | struct kernel_lb_addr loc = { |
165923fa MS |
1070 | .logicalBlockNum = le32_to_cpu( |
1071 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 1072 | .partitionReferenceNum = p_index, |
165923fa MS |
1073 | }; |
1074 | ||
97e961fd | 1075 | map->s_uspace.s_table = udf_iget(sb, &loc); |
165923fa MS |
1076 | if (!map->s_uspace.s_table) { |
1077 | udf_debug("cannot load unallocSpaceTable (part %d)\n", | |
a983f368 | 1078 | p_index); |
d759bfa4 | 1079 | return -EIO; |
165923fa MS |
1080 | } |
1081 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; | |
1082 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", | |
a983f368 | 1083 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1084 | } |
1085 | ||
1086 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1087 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1088 | if (!bitmap) | |
d759bfa4 | 1089 | return -ENOMEM; |
165923fa | 1090 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1091 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1092 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1093 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
a983f368 JP |
1094 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", |
1095 | p_index, bitmap->s_extPosition); | |
165923fa MS |
1096 | } |
1097 | ||
1098 | if (phd->partitionIntegrityTable.extLength) | |
3fb38dfa | 1099 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); |
165923fa MS |
1100 | |
1101 | if (phd->freedSpaceTable.extLength) { | |
5ca4e4be | 1102 | struct kernel_lb_addr loc = { |
165923fa MS |
1103 | .logicalBlockNum = le32_to_cpu( |
1104 | phd->freedSpaceTable.extPosition), | |
3fb38dfa | 1105 | .partitionReferenceNum = p_index, |
165923fa MS |
1106 | }; |
1107 | ||
97e961fd | 1108 | map->s_fspace.s_table = udf_iget(sb, &loc); |
165923fa | 1109 | if (!map->s_fspace.s_table) { |
3fb38dfa | 1110 | udf_debug("cannot load freedSpaceTable (part %d)\n", |
a983f368 | 1111 | p_index); |
d759bfa4 | 1112 | return -EIO; |
165923fa MS |
1113 | } |
1114 | ||
1115 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; | |
1116 | udf_debug("freedSpaceTable (part %d) @ %ld\n", | |
a983f368 | 1117 | p_index, map->s_fspace.s_table->i_ino); |
165923fa MS |
1118 | } |
1119 | ||
1120 | if (phd->freedSpaceBitmap.extLength) { | |
3fb38dfa JK |
1121 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1122 | if (!bitmap) | |
d759bfa4 | 1123 | return -ENOMEM; |
165923fa | 1124 | map->s_fspace.s_bitmap = bitmap; |
2e0838fd | 1125 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1126 | phd->freedSpaceBitmap.extPosition); |
2e0838fd | 1127 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
a983f368 JP |
1128 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", |
1129 | p_index, bitmap->s_extPosition); | |
165923fa | 1130 | } |
3fb38dfa JK |
1131 | return 0; |
1132 | } | |
1133 | ||
e971b0b9 JK |
1134 | static void udf_find_vat_block(struct super_block *sb, int p_index, |
1135 | int type1_index, sector_t start_block) | |
38b74a53 JK |
1136 | { |
1137 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1138 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
e971b0b9 | 1139 | sector_t vat_block; |
5ca4e4be | 1140 | struct kernel_lb_addr ino; |
e971b0b9 JK |
1141 | |
1142 | /* | |
1143 | * VAT file entry is in the last recorded block. Some broken disks have | |
1144 | * it a few blocks before so try a bit harder... | |
1145 | */ | |
1146 | ino.partitionReferenceNum = type1_index; | |
1147 | for (vat_block = start_block; | |
1148 | vat_block >= map->s_partition_root && | |
1149 | vat_block >= start_block - 3 && | |
1150 | !sbi->s_vat_inode; vat_block--) { | |
1151 | ino.logicalBlockNum = vat_block - map->s_partition_root; | |
1152 | sbi->s_vat_inode = udf_iget(sb, &ino); | |
1153 | } | |
1154 | } | |
1155 | ||
1156 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) | |
1157 | { | |
1158 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1159 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
fa5e0815 JK |
1160 | struct buffer_head *bh = NULL; |
1161 | struct udf_inode_info *vati; | |
1162 | uint32_t pos; | |
1163 | struct virtualAllocationTable20 *vat20; | |
4bf17af0 | 1164 | sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; |
38b74a53 | 1165 | |
e971b0b9 | 1166 | udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); |
4bf17af0 JK |
1167 | if (!sbi->s_vat_inode && |
1168 | sbi->s_last_block != blocks - 1) { | |
78ace70c JP |
1169 | pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", |
1170 | (unsigned long)sbi->s_last_block, | |
1171 | (unsigned long)blocks - 1); | |
e971b0b9 | 1172 | udf_find_vat_block(sb, p_index, type1_index, blocks - 1); |
4bf17af0 | 1173 | } |
38b74a53 | 1174 | if (!sbi->s_vat_inode) |
d759bfa4 | 1175 | return -EIO; |
38b74a53 JK |
1176 | |
1177 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
47c9358a | 1178 | map->s_type_specific.s_virtual.s_start_offset = 0; |
38b74a53 JK |
1179 | map->s_type_specific.s_virtual.s_num_entries = |
1180 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1181 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
fa5e0815 JK |
1182 | vati = UDF_I(sbi->s_vat_inode); |
1183 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1184 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1185 | bh = sb_bread(sb, pos); | |
1186 | if (!bh) | |
d759bfa4 | 1187 | return -EIO; |
fa5e0815 JK |
1188 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; |
1189 | } else { | |
1190 | vat20 = (struct virtualAllocationTable20 *) | |
1191 | vati->i_ext.i_data; | |
1192 | } | |
38b74a53 | 1193 | |
38b74a53 | 1194 | map->s_type_specific.s_virtual.s_start_offset = |
47c9358a | 1195 | le16_to_cpu(vat20->lengthHeader); |
38b74a53 JK |
1196 | map->s_type_specific.s_virtual.s_num_entries = |
1197 | (sbi->s_vat_inode->i_size - | |
1198 | map->s_type_specific.s_virtual. | |
1199 | s_start_offset) >> 2; | |
1200 | brelse(bh); | |
1201 | } | |
1202 | return 0; | |
1203 | } | |
1204 | ||
d759bfa4 JK |
1205 | /* |
1206 | * Load partition descriptor block | |
1207 | * | |
1208 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor | |
1209 | * sequence. | |
1210 | */ | |
3fb38dfa JK |
1211 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
1212 | { | |
1213 | struct buffer_head *bh; | |
1214 | struct partitionDesc *p; | |
1215 | struct udf_part_map *map; | |
1216 | struct udf_sb_info *sbi = UDF_SB(sb); | |
38b74a53 | 1217 | int i, type1_idx; |
3fb38dfa JK |
1218 | uint16_t partitionNumber; |
1219 | uint16_t ident; | |
d759bfa4 | 1220 | int ret; |
3fb38dfa JK |
1221 | |
1222 | bh = udf_read_tagged(sb, block, block, &ident); | |
1223 | if (!bh) | |
d759bfa4 JK |
1224 | return -EAGAIN; |
1225 | if (ident != TAG_IDENT_PD) { | |
1226 | ret = 0; | |
3fb38dfa | 1227 | goto out_bh; |
d759bfa4 | 1228 | } |
3fb38dfa JK |
1229 | |
1230 | p = (struct partitionDesc *)bh->b_data; | |
1231 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
38b74a53 | 1232 | |
bfb257a5 | 1233 | /* First scan for TYPE1, SPARABLE and METADATA partitions */ |
3fb38dfa JK |
1234 | for (i = 0; i < sbi->s_partitions; i++) { |
1235 | map = &sbi->s_partmaps[i]; | |
1236 | udf_debug("Searching map: (%d == %d)\n", | |
1237 | map->s_partition_num, partitionNumber); | |
38b74a53 JK |
1238 | if (map->s_partition_num == partitionNumber && |
1239 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1240 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
3fb38dfa JK |
1241 | break; |
1242 | } | |
1243 | ||
38b74a53 | 1244 | if (i >= sbi->s_partitions) { |
3fb38dfa JK |
1245 | udf_debug("Partition (%d) not found in partition map\n", |
1246 | partitionNumber); | |
d759bfa4 | 1247 | ret = 0; |
3fb38dfa JK |
1248 | goto out_bh; |
1249 | } | |
165923fa | 1250 | |
3fb38dfa | 1251 | ret = udf_fill_partdesc_info(sb, p, i); |
d759bfa4 JK |
1252 | if (ret < 0) |
1253 | goto out_bh; | |
38b74a53 JK |
1254 | |
1255 | /* | |
bfb257a5 JK |
1256 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
1257 | * PHYSICAL partitions are already set up | |
38b74a53 JK |
1258 | */ |
1259 | type1_idx = i; | |
1260 | for (i = 0; i < sbi->s_partitions; i++) { | |
1261 | map = &sbi->s_partmaps[i]; | |
1262 | ||
1263 | if (map->s_partition_num == partitionNumber && | |
1264 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
bfb257a5 JK |
1265 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
1266 | map->s_partition_type == UDF_METADATA_MAP25)) | |
38b74a53 JK |
1267 | break; |
1268 | } | |
1269 | ||
d759bfa4 JK |
1270 | if (i >= sbi->s_partitions) { |
1271 | ret = 0; | |
38b74a53 | 1272 | goto out_bh; |
d759bfa4 | 1273 | } |
38b74a53 JK |
1274 | |
1275 | ret = udf_fill_partdesc_info(sb, p, i); | |
d759bfa4 | 1276 | if (ret < 0) |
38b74a53 JK |
1277 | goto out_bh; |
1278 | ||
bfb257a5 JK |
1279 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
1280 | ret = udf_load_metadata_files(sb, i); | |
d759bfa4 | 1281 | if (ret < 0) { |
78ace70c JP |
1282 | udf_err(sb, "error loading MetaData partition map %d\n", |
1283 | i); | |
bfb257a5 JK |
1284 | goto out_bh; |
1285 | } | |
1286 | } else { | |
1287 | ret = udf_load_vat(sb, i, type1_idx); | |
d759bfa4 | 1288 | if (ret < 0) |
bfb257a5 JK |
1289 | goto out_bh; |
1290 | /* | |
1291 | * Mark filesystem read-only if we have a partition with | |
1292 | * virtual map since we don't handle writing to it (we | |
1293 | * overwrite blocks instead of relocating them). | |
1294 | */ | |
1295 | sb->s_flags |= MS_RDONLY; | |
78ace70c | 1296 | pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n"); |
bfb257a5 | 1297 | } |
d759bfa4 | 1298 | ret = 0; |
c0eb31ed | 1299 | out_bh: |
2e0838fd | 1300 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1301 | brelse(bh); |
1302 | return ret; | |
1da177e4 LT |
1303 | } |
1304 | ||
1df2ae31 JK |
1305 | static int udf_load_sparable_map(struct super_block *sb, |
1306 | struct udf_part_map *map, | |
1307 | struct sparablePartitionMap *spm) | |
1308 | { | |
1309 | uint32_t loc; | |
1310 | uint16_t ident; | |
1311 | struct sparingTable *st; | |
1312 | struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing; | |
1313 | int i; | |
1314 | struct buffer_head *bh; | |
1315 | ||
1316 | map->s_partition_type = UDF_SPARABLE_MAP15; | |
1317 | sdata->s_packet_len = le16_to_cpu(spm->packetLength); | |
1318 | if (!is_power_of_2(sdata->s_packet_len)) { | |
1319 | udf_err(sb, "error loading logical volume descriptor: " | |
1320 | "Invalid packet length %u\n", | |
1321 | (unsigned)sdata->s_packet_len); | |
1322 | return -EIO; | |
1323 | } | |
1324 | if (spm->numSparingTables > 4) { | |
1325 | udf_err(sb, "error loading logical volume descriptor: " | |
1326 | "Too many sparing tables (%d)\n", | |
1327 | (int)spm->numSparingTables); | |
1328 | return -EIO; | |
1329 | } | |
1330 | ||
1331 | for (i = 0; i < spm->numSparingTables; i++) { | |
1332 | loc = le32_to_cpu(spm->locSparingTable[i]); | |
1333 | bh = udf_read_tagged(sb, loc, loc, &ident); | |
1334 | if (!bh) | |
1335 | continue; | |
1336 | ||
1337 | st = (struct sparingTable *)bh->b_data; | |
1338 | if (ident != 0 || | |
1339 | strncmp(st->sparingIdent.ident, UDF_ID_SPARING, | |
1340 | strlen(UDF_ID_SPARING)) || | |
1341 | sizeof(*st) + le16_to_cpu(st->reallocationTableLen) > | |
1342 | sb->s_blocksize) { | |
1343 | brelse(bh); | |
1344 | continue; | |
1345 | } | |
1346 | ||
1347 | sdata->s_spar_map[i] = bh; | |
1348 | } | |
1349 | map->s_partition_func = udf_get_pblock_spar15; | |
1350 | return 0; | |
1351 | } | |
1352 | ||
c0eb31ed | 1353 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
5ca4e4be | 1354 | struct kernel_lb_addr *fileset) |
1da177e4 LT |
1355 | { |
1356 | struct logicalVolDesc *lvd; | |
1df2ae31 | 1357 | int i, offset; |
1da177e4 | 1358 | uint8_t type; |
6c79e987 | 1359 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1360 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1361 | uint16_t ident; |
1362 | struct buffer_head *bh; | |
adee11b2 | 1363 | unsigned int table_len; |
d759bfa4 | 1364 | int ret; |
1da177e4 | 1365 | |
c0eb31ed JK |
1366 | bh = udf_read_tagged(sb, block, block, &ident); |
1367 | if (!bh) | |
d759bfa4 | 1368 | return -EAGAIN; |
c0eb31ed | 1369 | BUG_ON(ident != TAG_IDENT_LVD); |
1da177e4 | 1370 | lvd = (struct logicalVolDesc *)bh->b_data; |
adee11b2 | 1371 | table_len = le32_to_cpu(lvd->mapTableLength); |
57b9655d | 1372 | if (table_len > sb->s_blocksize - sizeof(*lvd)) { |
adee11b2 JK |
1373 | udf_err(sb, "error loading logical volume descriptor: " |
1374 | "Partition table too long (%u > %lu)\n", table_len, | |
1375 | sb->s_blocksize - sizeof(*lvd)); | |
d759bfa4 | 1376 | ret = -EIO; |
adee11b2 JK |
1377 | goto out_bh; |
1378 | } | |
1da177e4 | 1379 | |
cb14d340 JK |
1380 | ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
1381 | if (ret) | |
c0eb31ed | 1382 | goto out_bh; |
1da177e4 | 1383 | |
cb00ea35 | 1384 | for (i = 0, offset = 0; |
adee11b2 | 1385 | i < sbi->s_partitions && offset < table_len; |
4b11111a MS |
1386 | i++, offset += gpm->partitionMapLength) { |
1387 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1388 | gpm = (struct genericPartitionMap *) | |
1389 | &(lvd->partitionMaps[offset]); | |
1390 | type = gpm->partitionMapType; | |
cb00ea35 | 1391 | if (type == 1) { |
4b11111a MS |
1392 | struct genericPartitionMap1 *gpm1 = |
1393 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1394 | map->s_partition_type = UDF_TYPE1_MAP15; |
1395 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1396 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1397 | map->s_partition_func = NULL; | |
cb00ea35 | 1398 | } else if (type == 2) { |
4b11111a MS |
1399 | struct udfPartitionMap2 *upm2 = |
1400 | (struct udfPartitionMap2 *)gpm; | |
1401 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1402 | strlen(UDF_ID_VIRTUAL))) { | |
1403 | u16 suf = | |
1404 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1405 | identSuffix)[0]); | |
c82a1275 | 1406 | if (suf < 0x0200) { |
4b11111a MS |
1407 | map->s_partition_type = |
1408 | UDF_VIRTUAL_MAP15; | |
1409 | map->s_partition_func = | |
1410 | udf_get_pblock_virt15; | |
c82a1275 | 1411 | } else { |
4b11111a MS |
1412 | map->s_partition_type = |
1413 | UDF_VIRTUAL_MAP20; | |
1414 | map->s_partition_func = | |
1415 | udf_get_pblock_virt20; | |
1da177e4 | 1416 | } |
4b11111a MS |
1417 | } else if (!strncmp(upm2->partIdent.ident, |
1418 | UDF_ID_SPARABLE, | |
1419 | strlen(UDF_ID_SPARABLE))) { | |
d759bfa4 JK |
1420 | ret = udf_load_sparable_map(sb, map, |
1421 | (struct sparablePartitionMap *)gpm); | |
1422 | if (ret < 0) | |
1df2ae31 | 1423 | goto out_bh; |
bfb257a5 JK |
1424 | } else if (!strncmp(upm2->partIdent.ident, |
1425 | UDF_ID_METADATA, | |
1426 | strlen(UDF_ID_METADATA))) { | |
1427 | struct udf_meta_data *mdata = | |
1428 | &map->s_type_specific.s_metadata; | |
1429 | struct metadataPartitionMap *mdm = | |
1430 | (struct metadataPartitionMap *) | |
1431 | &(lvd->partitionMaps[offset]); | |
a983f368 JP |
1432 | udf_debug("Parsing Logical vol part %d type %d id=%s\n", |
1433 | i, type, UDF_ID_METADATA); | |
bfb257a5 JK |
1434 | |
1435 | map->s_partition_type = UDF_METADATA_MAP25; | |
1436 | map->s_partition_func = udf_get_pblock_meta25; | |
1437 | ||
1438 | mdata->s_meta_file_loc = | |
1439 | le32_to_cpu(mdm->metadataFileLoc); | |
1440 | mdata->s_mirror_file_loc = | |
1441 | le32_to_cpu(mdm->metadataMirrorFileLoc); | |
1442 | mdata->s_bitmap_file_loc = | |
1443 | le32_to_cpu(mdm->metadataBitmapFileLoc); | |
1444 | mdata->s_alloc_unit_size = | |
1445 | le32_to_cpu(mdm->allocUnitSize); | |
1446 | mdata->s_align_unit_size = | |
1447 | le16_to_cpu(mdm->alignUnitSize); | |
ed47a7d0 JK |
1448 | if (mdm->flags & 0x01) |
1449 | mdata->s_flags |= MF_DUPLICATE_MD; | |
bfb257a5 JK |
1450 | |
1451 | udf_debug("Metadata Ident suffix=0x%x\n", | |
a983f368 JP |
1452 | le16_to_cpu(*(__le16 *) |
1453 | mdm->partIdent.identSuffix)); | |
bfb257a5 | 1454 | udf_debug("Metadata part num=%d\n", |
a983f368 | 1455 | le16_to_cpu(mdm->partitionNum)); |
bfb257a5 | 1456 | udf_debug("Metadata part alloc unit size=%d\n", |
a983f368 | 1457 | le32_to_cpu(mdm->allocUnitSize)); |
bfb257a5 | 1458 | udf_debug("Metadata file loc=%d\n", |
a983f368 | 1459 | le32_to_cpu(mdm->metadataFileLoc)); |
bfb257a5 | 1460 | udf_debug("Mirror file loc=%d\n", |
a983f368 | 1461 | le32_to_cpu(mdm->metadataMirrorFileLoc)); |
bfb257a5 | 1462 | udf_debug("Bitmap file loc=%d\n", |
a983f368 | 1463 | le32_to_cpu(mdm->metadataBitmapFileLoc)); |
ed47a7d0 JK |
1464 | udf_debug("Flags: %d %d\n", |
1465 | mdata->s_flags, mdm->flags); | |
cb00ea35 | 1466 | } else { |
3a71fc5d MS |
1467 | udf_debug("Unknown ident: %s\n", |
1468 | upm2->partIdent.ident); | |
1da177e4 LT |
1469 | continue; |
1470 | } | |
6c79e987 MS |
1471 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1472 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 LT |
1473 | } |
1474 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
a983f368 | 1475 | i, map->s_partition_num, type, map->s_volumeseqnum); |
1da177e4 LT |
1476 | } |
1477 | ||
cb00ea35 | 1478 | if (fileset) { |
5ca4e4be | 1479 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1480 | |
1481 | *fileset = lelb_to_cpu(la->extLocation); | |
a983f368 JP |
1482 | udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n", |
1483 | fileset->logicalBlockNum, | |
28de7948 | 1484 | fileset->partitionReferenceNum); |
1da177e4 LT |
1485 | } |
1486 | if (lvd->integritySeqExt.extLength) | |
1487 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
d759bfa4 | 1488 | ret = 0; |
c0eb31ed JK |
1489 | out_bh: |
1490 | brelse(bh); | |
1491 | return ret; | |
1da177e4 LT |
1492 | } |
1493 | ||
1494 | /* | |
1495 | * udf_load_logicalvolint | |
1496 | * | |
1497 | */ | |
5ca4e4be | 1498 | static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) |
1da177e4 LT |
1499 | { |
1500 | struct buffer_head *bh = NULL; | |
1501 | uint16_t ident; | |
6c79e987 MS |
1502 | struct udf_sb_info *sbi = UDF_SB(sb); |
1503 | struct logicalVolIntegrityDesc *lvid; | |
1da177e4 LT |
1504 | |
1505 | while (loc.extLength > 0 && | |
cb00ea35 CG |
1506 | (bh = udf_read_tagged(sb, loc.extLocation, |
1507 | loc.extLocation, &ident)) && | |
1508 | ident == TAG_IDENT_LVID) { | |
6c79e987 MS |
1509 | sbi->s_lvid_bh = bh; |
1510 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
cb00ea35 | 1511 | |
6c79e987 | 1512 | if (lvid->nextIntegrityExt.extLength) |
3a71fc5d | 1513 | udf_load_logicalvolint(sb, |
6c79e987 | 1514 | leea_to_cpu(lvid->nextIntegrityExt)); |
cb00ea35 | 1515 | |
6c79e987 | 1516 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1517 | brelse(bh); |
1da177e4 | 1518 | loc.extLength -= sb->s_blocksize; |
cb00ea35 | 1519 | loc.extLocation++; |
1da177e4 | 1520 | } |
6c79e987 | 1521 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1522 | brelse(bh); |
1da177e4 LT |
1523 | } |
1524 | ||
1525 | /* | |
d759bfa4 JK |
1526 | * Process a main/reserve volume descriptor sequence. |
1527 | * @block First block of first extent of the sequence. | |
1528 | * @lastblock Lastblock of first extent of the sequence. | |
1529 | * @fileset There we store extent containing root fileset | |
1da177e4 | 1530 | * |
d759bfa4 JK |
1531 | * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor |
1532 | * sequence | |
1da177e4 | 1533 | */ |
d759bfa4 JK |
1534 | static noinline int udf_process_sequence( |
1535 | struct super_block *sb, | |
1536 | sector_t block, sector_t lastblock, | |
1537 | struct kernel_lb_addr *fileset) | |
1da177e4 LT |
1538 | { |
1539 | struct buffer_head *bh = NULL; | |
1540 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
4b11111a | 1541 | struct udf_vds_record *curr; |
1da177e4 LT |
1542 | struct generic_desc *gd; |
1543 | struct volDescPtr *vdp; | |
cb00ea35 | 1544 | int done = 0; |
1da177e4 LT |
1545 | uint32_t vdsn; |
1546 | uint16_t ident; | |
1547 | long next_s = 0, next_e = 0; | |
d759bfa4 | 1548 | int ret; |
1da177e4 LT |
1549 | |
1550 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1551 | ||
c0eb31ed JK |
1552 | /* |
1553 | * Read the main descriptor sequence and find which descriptors | |
1554 | * are in it. | |
1555 | */ | |
cb00ea35 | 1556 | for (; (!done && block <= lastblock); block++) { |
1da177e4 LT |
1557 | |
1558 | bh = udf_read_tagged(sb, block, block, &ident); | |
c0eb31ed | 1559 | if (!bh) { |
78ace70c JP |
1560 | udf_err(sb, |
1561 | "Block %llu of volume descriptor sequence is corrupted or we could not read it\n", | |
1562 | (unsigned long long)block); | |
d759bfa4 | 1563 | return -EAGAIN; |
c0eb31ed | 1564 | } |
1da177e4 LT |
1565 | |
1566 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1567 | gd = (struct generic_desc *)bh->b_data; | |
1568 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1569 | switch (ident) { |
28de7948 | 1570 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
4b11111a MS |
1571 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
1572 | if (vdsn >= curr->volDescSeqNum) { | |
1573 | curr->volDescSeqNum = vdsn; | |
1574 | curr->block = block; | |
cb00ea35 CG |
1575 | } |
1576 | break; | |
28de7948 | 1577 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
4b11111a MS |
1578 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
1579 | if (vdsn >= curr->volDescSeqNum) { | |
1580 | curr->volDescSeqNum = vdsn; | |
1581 | curr->block = block; | |
cb00ea35 CG |
1582 | |
1583 | vdp = (struct volDescPtr *)bh->b_data; | |
4b11111a MS |
1584 | next_s = le32_to_cpu( |
1585 | vdp->nextVolDescSeqExt.extLocation); | |
1586 | next_e = le32_to_cpu( | |
1587 | vdp->nextVolDescSeqExt.extLength); | |
cb00ea35 CG |
1588 | next_e = next_e >> sb->s_blocksize_bits; |
1589 | next_e += next_s; | |
1590 | } | |
1591 | break; | |
28de7948 | 1592 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
4b11111a MS |
1593 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
1594 | if (vdsn >= curr->volDescSeqNum) { | |
1595 | curr->volDescSeqNum = vdsn; | |
1596 | curr->block = block; | |
cb00ea35 CG |
1597 | } |
1598 | break; | |
28de7948 | 1599 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
4b11111a MS |
1600 | curr = &vds[VDS_POS_PARTITION_DESC]; |
1601 | if (!curr->block) | |
1602 | curr->block = block; | |
cb00ea35 | 1603 | break; |
28de7948 | 1604 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
4b11111a MS |
1605 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
1606 | if (vdsn >= curr->volDescSeqNum) { | |
1607 | curr->volDescSeqNum = vdsn; | |
1608 | curr->block = block; | |
cb00ea35 CG |
1609 | } |
1610 | break; | |
28de7948 | 1611 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
4b11111a MS |
1612 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
1613 | if (vdsn >= curr->volDescSeqNum) { | |
1614 | curr->volDescSeqNum = vdsn; | |
1615 | curr->block = block; | |
cb00ea35 CG |
1616 | } |
1617 | break; | |
28de7948 | 1618 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
cb00ea35 CG |
1619 | vds[VDS_POS_TERMINATING_DESC].block = block; |
1620 | if (next_e) { | |
1621 | block = next_s; | |
1622 | lastblock = next_e; | |
1623 | next_s = next_e = 0; | |
4b11111a | 1624 | } else |
cb00ea35 CG |
1625 | done = 1; |
1626 | break; | |
1da177e4 | 1627 | } |
3bf25cb4 | 1628 | brelse(bh); |
1da177e4 | 1629 | } |
c0eb31ed JK |
1630 | /* |
1631 | * Now read interesting descriptors again and process them | |
1632 | * in a suitable order | |
1633 | */ | |
1634 | if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { | |
78ace70c | 1635 | udf_err(sb, "Primary Volume Descriptor not found!\n"); |
d759bfa4 JK |
1636 | return -EAGAIN; |
1637 | } | |
1638 | ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block); | |
1639 | if (ret < 0) | |
1640 | return ret; | |
1641 | ||
1642 | if (vds[VDS_POS_LOGICAL_VOL_DESC].block) { | |
1643 | ret = udf_load_logicalvol(sb, | |
1644 | vds[VDS_POS_LOGICAL_VOL_DESC].block, | |
1645 | fileset); | |
1646 | if (ret < 0) | |
1647 | return ret; | |
c0eb31ed | 1648 | } |
165923fa | 1649 | |
c0eb31ed JK |
1650 | if (vds[VDS_POS_PARTITION_DESC].block) { |
1651 | /* | |
1652 | * We rescan the whole descriptor sequence to find | |
1653 | * partition descriptor blocks and process them. | |
1654 | */ | |
1655 | for (block = vds[VDS_POS_PARTITION_DESC].block; | |
1656 | block < vds[VDS_POS_TERMINATING_DESC].block; | |
d759bfa4 JK |
1657 | block++) { |
1658 | ret = udf_load_partdesc(sb, block); | |
1659 | if (ret < 0) | |
1660 | return ret; | |
1661 | } | |
1da177e4 LT |
1662 | } |
1663 | ||
1664 | return 0; | |
1665 | } | |
1666 | ||
d759bfa4 JK |
1667 | /* |
1668 | * Load Volume Descriptor Sequence described by anchor in bh | |
1669 | * | |
1670 | * Returns <0 on error, 0 on success | |
1671 | */ | |
40346005 JK |
1672 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, |
1673 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1674 | { |
40346005 | 1675 | struct anchorVolDescPtr *anchor; |
d759bfa4 JK |
1676 | sector_t main_s, main_e, reserve_s, reserve_e; |
1677 | int ret; | |
1da177e4 | 1678 | |
40346005 JK |
1679 | anchor = (struct anchorVolDescPtr *)bh->b_data; |
1680 | ||
1681 | /* Locate the main sequence */ | |
1682 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1683 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1684 | main_e = main_e >> sb->s_blocksize_bits; | |
1685 | main_e += main_s; | |
1686 | ||
1687 | /* Locate the reserve sequence */ | |
1688 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); | |
1689 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); | |
1690 | reserve_e = reserve_e >> sb->s_blocksize_bits; | |
1691 | reserve_e += reserve_s; | |
1692 | ||
1693 | /* Process the main & reserve sequences */ | |
1694 | /* responsible for finding the PartitionDesc(s) */ | |
d759bfa4 JK |
1695 | ret = udf_process_sequence(sb, main_s, main_e, fileset); |
1696 | if (ret != -EAGAIN) | |
1697 | return ret; | |
bff943af | 1698 | udf_sb_free_partitions(sb); |
d759bfa4 JK |
1699 | ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset); |
1700 | if (ret < 0) { | |
1701 | udf_sb_free_partitions(sb); | |
1702 | /* No sequence was OK, return -EIO */ | |
1703 | if (ret == -EAGAIN) | |
1704 | ret = -EIO; | |
1705 | } | |
1706 | return ret; | |
1da177e4 LT |
1707 | } |
1708 | ||
40346005 JK |
1709 | /* |
1710 | * Check whether there is an anchor block in the given block and | |
1711 | * load Volume Descriptor Sequence if so. | |
d759bfa4 JK |
1712 | * |
1713 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor | |
1714 | * block | |
40346005 JK |
1715 | */ |
1716 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, | |
1717 | struct kernel_lb_addr *fileset) | |
1197e4df | 1718 | { |
40346005 JK |
1719 | struct buffer_head *bh; |
1720 | uint16_t ident; | |
1721 | int ret; | |
1197e4df | 1722 | |
40346005 JK |
1723 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
1724 | udf_fixed_to_variable(block) >= | |
1725 | sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) | |
d759bfa4 | 1726 | return -EAGAIN; |
40346005 JK |
1727 | |
1728 | bh = udf_read_tagged(sb, block, block, &ident); | |
1729 | if (!bh) | |
d759bfa4 | 1730 | return -EAGAIN; |
40346005 JK |
1731 | if (ident != TAG_IDENT_AVDP) { |
1732 | brelse(bh); | |
d759bfa4 | 1733 | return -EAGAIN; |
1197e4df | 1734 | } |
40346005 JK |
1735 | ret = udf_load_sequence(sb, bh, fileset); |
1736 | brelse(bh); | |
1737 | return ret; | |
1197e4df CL |
1738 | } |
1739 | ||
d759bfa4 JK |
1740 | /* |
1741 | * Search for an anchor volume descriptor pointer. | |
1742 | * | |
1743 | * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set | |
1744 | * of anchors. | |
1745 | */ | |
1746 | static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock, | |
1747 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1748 | { |
40346005 | 1749 | sector_t last[6]; |
38b74a53 | 1750 | int i; |
40346005 JK |
1751 | struct udf_sb_info *sbi = UDF_SB(sb); |
1752 | int last_count = 0; | |
d759bfa4 | 1753 | int ret; |
1da177e4 | 1754 | |
40346005 JK |
1755 | /* First try user provided anchor */ |
1756 | if (sbi->s_anchor) { | |
d759bfa4 JK |
1757 | ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset); |
1758 | if (ret != -EAGAIN) | |
1759 | return ret; | |
40346005 JK |
1760 | } |
1761 | /* | |
1762 | * according to spec, anchor is in either: | |
1763 | * block 256 | |
1764 | * lastblock-256 | |
1765 | * lastblock | |
1766 | * however, if the disc isn't closed, it could be 512. | |
1767 | */ | |
d759bfa4 JK |
1768 | ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset); |
1769 | if (ret != -EAGAIN) | |
1770 | return ret; | |
40346005 JK |
1771 | /* |
1772 | * The trouble is which block is the last one. Drives often misreport | |
1773 | * this so we try various possibilities. | |
1774 | */ | |
d759bfa4 JK |
1775 | last[last_count++] = *lastblock; |
1776 | if (*lastblock >= 1) | |
1777 | last[last_count++] = *lastblock - 1; | |
1778 | last[last_count++] = *lastblock + 1; | |
1779 | if (*lastblock >= 2) | |
1780 | last[last_count++] = *lastblock - 2; | |
1781 | if (*lastblock >= 150) | |
1782 | last[last_count++] = *lastblock - 150; | |
1783 | if (*lastblock >= 152) | |
1784 | last[last_count++] = *lastblock - 152; | |
1da177e4 | 1785 | |
40346005 JK |
1786 | for (i = 0; i < last_count; i++) { |
1787 | if (last[i] >= sb->s_bdev->bd_inode->i_size >> | |
1788 | sb->s_blocksize_bits) | |
28f7c4d4 | 1789 | continue; |
d759bfa4 JK |
1790 | ret = udf_check_anchor_block(sb, last[i], fileset); |
1791 | if (ret != -EAGAIN) { | |
1792 | if (!ret) | |
1793 | *lastblock = last[i]; | |
1794 | return ret; | |
1795 | } | |
40346005 | 1796 | if (last[i] < 256) |
28f7c4d4 | 1797 | continue; |
d759bfa4 JK |
1798 | ret = udf_check_anchor_block(sb, last[i] - 256, fileset); |
1799 | if (ret != -EAGAIN) { | |
1800 | if (!ret) | |
1801 | *lastblock = last[i]; | |
1802 | return ret; | |
1803 | } | |
40346005 | 1804 | } |
28f7c4d4 | 1805 | |
40346005 | 1806 | /* Finally try block 512 in case media is open */ |
d759bfa4 | 1807 | return udf_check_anchor_block(sb, sbi->s_session + 512, fileset); |
40346005 | 1808 | } |
28f7c4d4 | 1809 | |
40346005 JK |
1810 | /* |
1811 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from | |
1812 | * area specified by it. The function expects sbi->s_lastblock to be the last | |
1813 | * block on the media. | |
1814 | * | |
d759bfa4 JK |
1815 | * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor |
1816 | * was not found. | |
40346005 JK |
1817 | */ |
1818 | static int udf_find_anchor(struct super_block *sb, | |
1819 | struct kernel_lb_addr *fileset) | |
1820 | { | |
40346005 | 1821 | struct udf_sb_info *sbi = UDF_SB(sb); |
d759bfa4 JK |
1822 | sector_t lastblock = sbi->s_last_block; |
1823 | int ret; | |
28f7c4d4 | 1824 | |
d759bfa4 JK |
1825 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1826 | if (ret != -EAGAIN) | |
40346005 | 1827 | goto out; |
1da177e4 | 1828 | |
40346005 JK |
1829 | /* No anchor found? Try VARCONV conversion of block numbers */ |
1830 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
d759bfa4 | 1831 | lastblock = udf_variable_to_fixed(sbi->s_last_block); |
40346005 | 1832 | /* Firstly, we try to not convert number of the last block */ |
d759bfa4 JK |
1833 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1834 | if (ret != -EAGAIN) | |
40346005 | 1835 | goto out; |
1da177e4 | 1836 | |
d759bfa4 | 1837 | lastblock = sbi->s_last_block; |
40346005 | 1838 | /* Secondly, we try with converted number of the last block */ |
d759bfa4 JK |
1839 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1840 | if (ret < 0) { | |
40346005 JK |
1841 | /* VARCONV didn't help. Clear it. */ |
1842 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); | |
1da177e4 | 1843 | } |
40346005 | 1844 | out: |
d759bfa4 JK |
1845 | if (ret == 0) |
1846 | sbi->s_last_block = lastblock; | |
1847 | return ret; | |
40346005 | 1848 | } |
1da177e4 | 1849 | |
40346005 JK |
1850 | /* |
1851 | * Check Volume Structure Descriptor, find Anchor block and load Volume | |
d759bfa4 JK |
1852 | * Descriptor Sequence. |
1853 | * | |
1854 | * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor | |
1855 | * block was not found. | |
40346005 JK |
1856 | */ |
1857 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, | |
1858 | int silent, struct kernel_lb_addr *fileset) | |
1859 | { | |
1860 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1861 | loff_t nsr_off; | |
d759bfa4 | 1862 | int ret; |
40346005 JK |
1863 | |
1864 | if (!sb_set_blocksize(sb, uopt->blocksize)) { | |
1865 | if (!silent) | |
78ace70c | 1866 | udf_warn(sb, "Bad block size\n"); |
d759bfa4 | 1867 | return -EINVAL; |
40346005 JK |
1868 | } |
1869 | sbi->s_last_block = uopt->lastblock; | |
1870 | if (!uopt->novrs) { | |
1871 | /* Check that it is NSR02 compliant */ | |
1872 | nsr_off = udf_check_vsd(sb); | |
1873 | if (!nsr_off) { | |
1874 | if (!silent) | |
78ace70c | 1875 | udf_warn(sb, "No VRS found\n"); |
40346005 JK |
1876 | return 0; |
1877 | } | |
1878 | if (nsr_off == -1) | |
a983f368 | 1879 | udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n"); |
40346005 JK |
1880 | if (!sbi->s_last_block) |
1881 | sbi->s_last_block = udf_get_last_block(sb); | |
1882 | } else { | |
1883 | udf_debug("Validity check skipped because of novrs option\n"); | |
28f7c4d4 | 1884 | } |
1da177e4 | 1885 | |
40346005 JK |
1886 | /* Look for anchor block and load Volume Descriptor Sequence */ |
1887 | sbi->s_anchor = uopt->anchor; | |
d759bfa4 JK |
1888 | ret = udf_find_anchor(sb, fileset); |
1889 | if (ret < 0) { | |
1890 | if (!silent && ret == -EAGAIN) | |
78ace70c | 1891 | udf_warn(sb, "No anchor found\n"); |
d759bfa4 | 1892 | return ret; |
40346005 | 1893 | } |
d759bfa4 | 1894 | return 0; |
1da177e4 LT |
1895 | } |
1896 | ||
1897 | static void udf_open_lvid(struct super_block *sb) | |
1898 | { | |
6c79e987 MS |
1899 | struct udf_sb_info *sbi = UDF_SB(sb); |
1900 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
1901 | struct logicalVolIntegrityDesc *lvid; |
1902 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
146bca72 | 1903 | |
165923fa MS |
1904 | if (!bh) |
1905 | return; | |
949f4a7c JK |
1906 | |
1907 | mutex_lock(&sbi->s_alloc_mutex); | |
165923fa MS |
1908 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
1909 | lvidiu = udf_sb_lvidiu(sbi); | |
1910 | ||
1911 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1912 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1913 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, | |
1914 | CURRENT_TIME); | |
146bca72 | 1915 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); |
165923fa MS |
1916 | |
1917 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1918 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 1919 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
1920 | |
1921 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1922 | mark_buffer_dirty(bh); | |
146bca72 | 1923 | sbi->s_lvid_dirty = 0; |
949f4a7c | 1924 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
1925 | /* Make opening of filesystem visible on the media immediately */ |
1926 | sync_dirty_buffer(bh); | |
1da177e4 LT |
1927 | } |
1928 | ||
1929 | static void udf_close_lvid(struct super_block *sb) | |
1930 | { | |
6c79e987 MS |
1931 | struct udf_sb_info *sbi = UDF_SB(sb); |
1932 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1933 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 1934 | struct logicalVolIntegrityDescImpUse *lvidiu; |
28de7948 | 1935 | |
6c79e987 MS |
1936 | if (!bh) |
1937 | return; | |
1938 | ||
949f4a7c | 1939 | mutex_lock(&sbi->s_alloc_mutex); |
6c79e987 | 1940 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
165923fa MS |
1941 | lvidiu = udf_sb_lvidiu(sbi); |
1942 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1943 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1944 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); | |
1945 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) | |
1946 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
1947 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
1948 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
1949 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
1950 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
1951 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
1952 | ||
1953 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1954 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 1955 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
1956 | |
1957 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
853a0c25 JK |
1958 | /* |
1959 | * We set buffer uptodate unconditionally here to avoid spurious | |
1960 | * warnings from mark_buffer_dirty() when previous EIO has marked | |
1961 | * the buffer as !uptodate | |
1962 | */ | |
1963 | set_buffer_uptodate(bh); | |
165923fa | 1964 | mark_buffer_dirty(bh); |
146bca72 | 1965 | sbi->s_lvid_dirty = 0; |
949f4a7c | 1966 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
1967 | /* Make closing of filesystem visible on the media immediately */ |
1968 | sync_dirty_buffer(bh); | |
1da177e4 LT |
1969 | } |
1970 | ||
d664b6af JK |
1971 | u64 lvid_get_unique_id(struct super_block *sb) |
1972 | { | |
1973 | struct buffer_head *bh; | |
1974 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1975 | struct logicalVolIntegrityDesc *lvid; | |
1976 | struct logicalVolHeaderDesc *lvhd; | |
1977 | u64 uniqueID; | |
1978 | u64 ret; | |
1979 | ||
1980 | bh = sbi->s_lvid_bh; | |
1981 | if (!bh) | |
1982 | return 0; | |
1983 | ||
1984 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1985 | lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; | |
1986 | ||
1987 | mutex_lock(&sbi->s_alloc_mutex); | |
1988 | ret = uniqueID = le64_to_cpu(lvhd->uniqueID); | |
1989 | if (!(++uniqueID & 0xFFFFFFFF)) | |
1990 | uniqueID += 16; | |
1991 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
1992 | mutex_unlock(&sbi->s_alloc_mutex); | |
1993 | mark_buffer_dirty(bh); | |
1994 | ||
1995 | return ret; | |
1da177e4 LT |
1996 | } |
1997 | ||
1da177e4 LT |
1998 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
1999 | { | |
d759bfa4 | 2000 | int ret = -EINVAL; |
cb00ea35 | 2001 | struct inode *inode = NULL; |
1da177e4 | 2002 | struct udf_options uopt; |
5ca4e4be | 2003 | struct kernel_lb_addr rootdir, fileset; |
1da177e4 LT |
2004 | struct udf_sb_info *sbi; |
2005 | ||
2006 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
c2ba138a EB |
2007 | uopt.uid = INVALID_UID; |
2008 | uopt.gid = INVALID_GID; | |
1da177e4 | 2009 | uopt.umask = 0; |
87bc730c MS |
2010 | uopt.fmode = UDF_INVALID_MODE; |
2011 | uopt.dmode = UDF_INVALID_MODE; | |
1da177e4 | 2012 | |
6c79e987 | 2013 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
9db9f9e3 | 2014 | if (!sbi) |
1da177e4 | 2015 | return -ENOMEM; |
28de7948 | 2016 | |
1da177e4 | 2017 | sb->s_fs_info = sbi; |
1da177e4 | 2018 | |
1e7933de | 2019 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 2020 | |
6da80894 | 2021 | if (!udf_parse_options((char *)options, &uopt, false)) |
1da177e4 LT |
2022 | goto error_out; |
2023 | ||
2024 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 2025 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
8076c363 | 2026 | udf_err(sb, "utf8 cannot be combined with iocharset\n"); |
1da177e4 LT |
2027 | goto error_out; |
2028 | } | |
2029 | #ifdef CONFIG_UDF_NLS | |
cb00ea35 | 2030 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
2031 | uopt.nls_map = load_nls_default(); |
2032 | if (!uopt.nls_map) | |
2033 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
2034 | else | |
2035 | udf_debug("Using default NLS map\n"); | |
2036 | } | |
2037 | #endif | |
2038 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
2039 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
2040 | ||
2041 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
2042 | fileset.partitionReferenceNum = 0xFFFF; | |
2043 | ||
6c79e987 MS |
2044 | sbi->s_flags = uopt.flags; |
2045 | sbi->s_uid = uopt.uid; | |
2046 | sbi->s_gid = uopt.gid; | |
2047 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
2048 | sbi->s_fmode = uopt.fmode; |
2049 | sbi->s_dmode = uopt.dmode; | |
6c79e987 | 2050 | sbi->s_nls_map = uopt.nls_map; |
c03cad24 | 2051 | rwlock_init(&sbi->s_cred_lock); |
1da177e4 | 2052 | |
cb00ea35 | 2053 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 2054 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 2055 | else |
6c79e987 | 2056 | sbi->s_session = uopt.session; |
1da177e4 | 2057 | |
6c79e987 | 2058 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 2059 | |
40346005 JK |
2060 | /* Fill in the rest of the superblock */ |
2061 | sb->s_op = &udf_sb_ops; | |
2062 | sb->s_export_op = &udf_export_ops; | |
123e9caf | 2063 | |
40346005 JK |
2064 | sb->s_magic = UDF_SUPER_MAGIC; |
2065 | sb->s_time_gran = 1000; | |
2066 | ||
1197e4df | 2067 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { |
40346005 | 2068 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 2069 | } else { |
e1defc4f | 2070 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); |
40346005 | 2071 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
d759bfa4 | 2072 | if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { |
1197e4df | 2073 | if (!silent) |
78ace70c JP |
2074 | pr_notice("Rescanning with blocksize %d\n", |
2075 | UDF_DEFAULT_BLOCKSIZE); | |
dc141a40 AS |
2076 | brelse(sbi->s_lvid_bh); |
2077 | sbi->s_lvid_bh = NULL; | |
1197e4df | 2078 | uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; |
40346005 | 2079 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 2080 | } |
1da177e4 | 2081 | } |
d759bfa4 JK |
2082 | if (ret < 0) { |
2083 | if (ret == -EAGAIN) { | |
2084 | udf_warn(sb, "No partition found (1)\n"); | |
2085 | ret = -EINVAL; | |
2086 | } | |
1da177e4 LT |
2087 | goto error_out; |
2088 | } | |
2089 | ||
6c79e987 | 2090 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
1da177e4 | 2091 | |
6c79e987 | 2092 | if (sbi->s_lvid_bh) { |
4b11111a MS |
2093 | struct logicalVolIntegrityDescImpUse *lvidiu = |
2094 | udf_sb_lvidiu(sbi); | |
6c79e987 MS |
2095 | uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); |
2096 | uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
4b11111a MS |
2097 | /* uint16_t maxUDFWriteRev = |
2098 | le16_to_cpu(lvidiu->maxUDFWriteRev); */ | |
1da177e4 | 2099 | |
cb00ea35 | 2100 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
78ace70c JP |
2101 | udf_err(sb, "minUDFReadRev=%x (max is %x)\n", |
2102 | le16_to_cpu(lvidiu->minUDFReadRev), | |
2103 | UDF_MAX_READ_VERSION); | |
d759bfa4 | 2104 | ret = -EINVAL; |
1da177e4 | 2105 | goto error_out; |
4b11111a | 2106 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) |
1da177e4 | 2107 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 2108 | |
6c79e987 | 2109 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
2110 | |
2111 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
2112 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
2113 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
2114 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
2115 | } | |
2116 | ||
6c79e987 | 2117 | if (!sbi->s_partitions) { |
78ace70c | 2118 | udf_warn(sb, "No partition found (2)\n"); |
d759bfa4 | 2119 | ret = -EINVAL; |
1da177e4 LT |
2120 | goto error_out; |
2121 | } | |
2122 | ||
4b11111a MS |
2123 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
2124 | UDF_PART_FLAG_READ_ONLY) { | |
78ace70c | 2125 | pr_notice("Partition marked readonly; forcing readonly mount\n"); |
39b3f6d6 | 2126 | sb->s_flags |= MS_RDONLY; |
c1a26e7d | 2127 | } |
39b3f6d6 | 2128 | |
cb00ea35 | 2129 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
78ace70c | 2130 | udf_warn(sb, "No fileset found\n"); |
d759bfa4 | 2131 | ret = -EINVAL; |
1da177e4 LT |
2132 | goto error_out; |
2133 | } | |
2134 | ||
cb00ea35 | 2135 | if (!silent) { |
5ca4e4be | 2136 | struct timestamp ts; |
56774805 | 2137 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); |
78ace70c JP |
2138 | udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
2139 | sbi->s_volume_ident, | |
2140 | le16_to_cpu(ts.year), ts.month, ts.day, | |
56774805 | 2141 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); |
1da177e4 LT |
2142 | } |
2143 | if (!(sb->s_flags & MS_RDONLY)) | |
2144 | udf_open_lvid(sb); | |
2145 | ||
2146 | /* Assign the root inode */ | |
2147 | /* assign inodes by physical block number */ | |
2148 | /* perhaps it's not extensible enough, but for now ... */ | |
97e961fd | 2149 | inode = udf_iget(sb, &rootdir); |
cb00ea35 | 2150 | if (!inode) { |
78ace70c | 2151 | udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n", |
cb00ea35 | 2152 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
d759bfa4 | 2153 | ret = -EIO; |
1da177e4 LT |
2154 | goto error_out; |
2155 | } | |
2156 | ||
2157 | /* Allocate a dentry for the root inode */ | |
48fde701 | 2158 | sb->s_root = d_make_root(inode); |
cb00ea35 | 2159 | if (!sb->s_root) { |
78ace70c | 2160 | udf_err(sb, "Couldn't allocate root dentry\n"); |
d759bfa4 | 2161 | ret = -ENOMEM; |
1da177e4 LT |
2162 | goto error_out; |
2163 | } | |
31170b6a | 2164 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
8de52778 | 2165 | sb->s_max_links = UDF_MAX_LINKS; |
1da177e4 LT |
2166 | return 0; |
2167 | ||
28de7948 | 2168 | error_out: |
6c79e987 MS |
2169 | if (sbi->s_vat_inode) |
2170 | iput(sbi->s_vat_inode); | |
1da177e4 LT |
2171 | #ifdef CONFIG_UDF_NLS |
2172 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2173 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2174 | #endif |
2175 | if (!(sb->s_flags & MS_RDONLY)) | |
2176 | udf_close_lvid(sb); | |
6c79e987 | 2177 | brelse(sbi->s_lvid_bh); |
bff943af | 2178 | udf_sb_free_partitions(sb); |
1da177e4 LT |
2179 | kfree(sbi); |
2180 | sb->s_fs_info = NULL; | |
28de7948 | 2181 | |
d759bfa4 | 2182 | return ret; |
1da177e4 LT |
2183 | } |
2184 | ||
8076c363 JP |
2185 | void _udf_err(struct super_block *sb, const char *function, |
2186 | const char *fmt, ...) | |
1da177e4 | 2187 | { |
c2bff36c | 2188 | struct va_format vaf; |
1da177e4 LT |
2189 | va_list args; |
2190 | ||
1da177e4 | 2191 | va_start(args, fmt); |
c2bff36c JP |
2192 | |
2193 | vaf.fmt = fmt; | |
2194 | vaf.va = &args; | |
2195 | ||
2196 | pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2197 | ||
1da177e4 | 2198 | va_end(args); |
1da177e4 LT |
2199 | } |
2200 | ||
a40ecd7b JP |
2201 | void _udf_warn(struct super_block *sb, const char *function, |
2202 | const char *fmt, ...) | |
1da177e4 | 2203 | { |
c2bff36c | 2204 | struct va_format vaf; |
1da177e4 LT |
2205 | va_list args; |
2206 | ||
cb00ea35 | 2207 | va_start(args, fmt); |
c2bff36c JP |
2208 | |
2209 | vaf.fmt = fmt; | |
2210 | vaf.va = &args; | |
2211 | ||
2212 | pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2213 | ||
1da177e4 | 2214 | va_end(args); |
1da177e4 LT |
2215 | } |
2216 | ||
cb00ea35 | 2217 | static void udf_put_super(struct super_block *sb) |
1da177e4 | 2218 | { |
6c79e987 | 2219 | struct udf_sb_info *sbi; |
1da177e4 | 2220 | |
6c79e987 | 2221 | sbi = UDF_SB(sb); |
6cfd0148 | 2222 | |
6c79e987 MS |
2223 | if (sbi->s_vat_inode) |
2224 | iput(sbi->s_vat_inode); | |
1da177e4 LT |
2225 | #ifdef CONFIG_UDF_NLS |
2226 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2227 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2228 | #endif |
2229 | if (!(sb->s_flags & MS_RDONLY)) | |
2230 | udf_close_lvid(sb); | |
6c79e987 | 2231 | brelse(sbi->s_lvid_bh); |
bff943af | 2232 | udf_sb_free_partitions(sb); |
1da177e4 LT |
2233 | kfree(sb->s_fs_info); |
2234 | sb->s_fs_info = NULL; | |
2235 | } | |
2236 | ||
146bca72 JK |
2237 | static int udf_sync_fs(struct super_block *sb, int wait) |
2238 | { | |
2239 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2240 | ||
2241 | mutex_lock(&sbi->s_alloc_mutex); | |
2242 | if (sbi->s_lvid_dirty) { | |
2243 | /* | |
2244 | * Blockdevice will be synced later so we don't have to submit | |
2245 | * the buffer for IO | |
2246 | */ | |
2247 | mark_buffer_dirty(sbi->s_lvid_bh); | |
146bca72 JK |
2248 | sbi->s_lvid_dirty = 0; |
2249 | } | |
2250 | mutex_unlock(&sbi->s_alloc_mutex); | |
2251 | ||
2252 | return 0; | |
2253 | } | |
2254 | ||
cb00ea35 | 2255 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2256 | { |
726c3342 | 2257 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
2258 | struct udf_sb_info *sbi = UDF_SB(sb); |
2259 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
557f5a14 | 2260 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
6c79e987 MS |
2261 | |
2262 | if (sbi->s_lvid_bh != NULL) | |
2263 | lvidiu = udf_sb_lvidiu(sbi); | |
2264 | else | |
2265 | lvidiu = NULL; | |
726c3342 | 2266 | |
1da177e4 LT |
2267 | buf->f_type = UDF_SUPER_MAGIC; |
2268 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 2269 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
2270 | buf->f_bfree = udf_count_free(sb); |
2271 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
2272 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
2273 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
2274 | + buf->f_bfree; | |
1da177e4 | 2275 | buf->f_ffree = buf->f_bfree; |
cb00ea35 | 2276 | buf->f_namelen = UDF_NAME_LEN - 2; |
557f5a14 CL |
2277 | buf->f_fsid.val[0] = (u32)id; |
2278 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
2279 | |
2280 | return 0; | |
2281 | } | |
2282 | ||
4b11111a MS |
2283 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
2284 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
2285 | { |
2286 | struct buffer_head *bh = NULL; | |
2287 | unsigned int accum = 0; | |
2288 | int index; | |
2289 | int block = 0, newblock; | |
5ca4e4be | 2290 | struct kernel_lb_addr loc; |
1da177e4 | 2291 | uint32_t bytes; |
1da177e4 LT |
2292 | uint8_t *ptr; |
2293 | uint16_t ident; | |
2294 | struct spaceBitmapDesc *bm; | |
2295 | ||
1da177e4 | 2296 | loc.logicalBlockNum = bitmap->s_extPosition; |
6c79e987 | 2297 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
97e961fd | 2298 | bh = udf_read_ptagged(sb, &loc, 0, &ident); |
1da177e4 | 2299 | |
cb00ea35 | 2300 | if (!bh) { |
78ace70c | 2301 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 | 2302 | goto out; |
cb00ea35 | 2303 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 2304 | brelse(bh); |
78ace70c | 2305 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 LT |
2306 | goto out; |
2307 | } | |
2308 | ||
2309 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2310 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
2311 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
2312 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 2313 | |
cb00ea35 | 2314 | while (bytes > 0) { |
01b954a3 MS |
2315 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
2316 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2317 | cur_bytes * 8); | |
2318 | bytes -= cur_bytes; | |
cb00ea35 | 2319 | if (bytes) { |
3bf25cb4 | 2320 | brelse(bh); |
97e961fd | 2321 | newblock = udf_get_lb_pblock(sb, &loc, ++block); |
1da177e4 | 2322 | bh = udf_tread(sb, newblock); |
cb00ea35 | 2323 | if (!bh) { |
1da177e4 LT |
2324 | udf_debug("read failed\n"); |
2325 | goto out; | |
2326 | } | |
2327 | index = 0; | |
28de7948 | 2328 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2329 | } |
2330 | } | |
3bf25cb4 | 2331 | brelse(bh); |
28de7948 | 2332 | out: |
1da177e4 LT |
2333 | return accum; |
2334 | } | |
2335 | ||
4b11111a MS |
2336 | static unsigned int udf_count_free_table(struct super_block *sb, |
2337 | struct inode *table) | |
1da177e4 LT |
2338 | { |
2339 | unsigned int accum = 0; | |
ff116fc8 | 2340 | uint32_t elen; |
5ca4e4be | 2341 | struct kernel_lb_addr eloc; |
1da177e4 | 2342 | int8_t etype; |
ff116fc8 | 2343 | struct extent_position epos; |
1da177e4 | 2344 | |
d1668fe3 | 2345 | mutex_lock(&UDF_SB(sb)->s_alloc_mutex); |
c0b34438 | 2346 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2347 | epos.offset = sizeof(struct unallocSpaceEntry); |
2348 | epos.bh = NULL; | |
1da177e4 | 2349 | |
3a71fc5d | 2350 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2351 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2352 | |
3bf25cb4 | 2353 | brelse(epos.bh); |
d1668fe3 | 2354 | mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); |
1da177e4 LT |
2355 | |
2356 | return accum; | |
2357 | } | |
cb00ea35 CG |
2358 | |
2359 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2360 | { |
2361 | unsigned int accum = 0; | |
6c79e987 MS |
2362 | struct udf_sb_info *sbi; |
2363 | struct udf_part_map *map; | |
1da177e4 | 2364 | |
6c79e987 MS |
2365 | sbi = UDF_SB(sb); |
2366 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2367 | struct logicalVolIntegrityDesc *lvid = |
2368 | (struct logicalVolIntegrityDesc *) | |
2369 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2370 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2371 | accum = le32_to_cpu( |
2372 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2373 | if (accum == 0xFFFFFFFF) |
2374 | accum = 0; | |
2375 | } | |
2376 | } | |
2377 | ||
2378 | if (accum) | |
2379 | return accum; | |
2380 | ||
6c79e987 MS |
2381 | map = &sbi->s_partmaps[sbi->s_partition]; |
2382 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2383 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2384 | map->s_uspace.s_bitmap); |
1da177e4 | 2385 | } |
6c79e987 | 2386 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
28de7948 | 2387 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2388 | map->s_fspace.s_bitmap); |
1da177e4 LT |
2389 | } |
2390 | if (accum) | |
2391 | return accum; | |
2392 | ||
6c79e987 | 2393 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2394 | accum += udf_count_free_table(sb, |
6c79e987 | 2395 | map->s_uspace.s_table); |
1da177e4 | 2396 | } |
6c79e987 | 2397 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
28de7948 | 2398 | accum += udf_count_free_table(sb, |
6c79e987 | 2399 | map->s_fspace.s_table); |
1da177e4 LT |
2400 | } |
2401 | ||
2402 | return accum; | |
2403 | } |