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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/vfs.h> |
52 | #include <linux/vmalloc.h> | |
dc5d39be | 53 | #include <linux/errno.h> |
6da80894 MS |
54 | #include <linux/mount.h> |
55 | #include <linux/seq_file.h> | |
01b954a3 | 56 | #include <linux/bitmap.h> |
f845fced | 57 | #include <linux/crc-itu-t.h> |
1df2ae31 | 58 | #include <linux/log2.h> |
1da177e4 LT |
59 | #include <asm/byteorder.h> |
60 | ||
1da177e4 LT |
61 | #include "udf_sb.h" |
62 | #include "udf_i.h" | |
63 | ||
64 | #include <linux/init.h> | |
e973606c | 65 | #include <linux/uaccess.h> |
1da177e4 LT |
66 | |
67 | #define VDS_POS_PRIMARY_VOL_DESC 0 | |
68 | #define VDS_POS_UNALLOC_SPACE_DESC 1 | |
69 | #define VDS_POS_LOGICAL_VOL_DESC 2 | |
70 | #define VDS_POS_PARTITION_DESC 3 | |
71 | #define VDS_POS_IMP_USE_VOL_DESC 4 | |
72 | #define VDS_POS_VOL_DESC_PTR 5 | |
73 | #define VDS_POS_TERMINATING_DESC 6 | |
74 | #define VDS_POS_LENGTH 7 | |
75 | ||
6da80894 MS |
76 | #define UDF_DEFAULT_BLOCKSIZE 2048 |
77 | ||
44499602 PF |
78 | #define VSD_FIRST_SECTOR_OFFSET 32768 |
79 | #define VSD_MAX_SECTOR_OFFSET 0x800000 | |
80 | ||
8de52778 AV |
81 | enum { UDF_MAX_LINKS = 0xffff }; |
82 | ||
1da177e4 LT |
83 | /* These are the "meat" - everything else is stuffing */ |
84 | static int udf_fill_super(struct super_block *, void *, int); | |
85 | static void udf_put_super(struct super_block *); | |
146bca72 | 86 | static int udf_sync_fs(struct super_block *, int); |
1da177e4 | 87 | static int udf_remount_fs(struct super_block *, int *, char *); |
5ca4e4be | 88 | static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); |
5ca4e4be PE |
89 | static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, |
90 | struct kernel_lb_addr *); | |
cb00ea35 | 91 | static void udf_load_fileset(struct super_block *, struct buffer_head *, |
5ca4e4be | 92 | struct kernel_lb_addr *); |
1da177e4 LT |
93 | static void udf_open_lvid(struct super_block *); |
94 | static void udf_close_lvid(struct super_block *); | |
95 | static unsigned int udf_count_free(struct super_block *); | |
726c3342 | 96 | static int udf_statfs(struct dentry *, struct kstatfs *); |
34c80b1d | 97 | static int udf_show_options(struct seq_file *, struct dentry *); |
1da177e4 | 98 | |
69d75671 | 99 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb) |
6c79e987 | 100 | { |
69d75671 JK |
101 | struct logicalVolIntegrityDesc *lvid; |
102 | unsigned int partnum; | |
103 | unsigned int offset; | |
104 | ||
105 | if (!UDF_SB(sb)->s_lvid_bh) | |
106 | return NULL; | |
107 | lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data; | |
108 | partnum = le32_to_cpu(lvid->numOfPartitions); | |
109 | if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) - | |
110 | offsetof(struct logicalVolIntegrityDesc, impUse)) / | |
111 | (2 * sizeof(uint32_t)) < partnum) { | |
112 | udf_err(sb, "Logical volume integrity descriptor corrupted " | |
113 | "(numOfPartitions = %u)!\n", partnum); | |
114 | return NULL; | |
115 | } | |
116 | /* The offset is to skip freeSpaceTable and sizeTable arrays */ | |
117 | offset = partnum * 2 * sizeof(uint32_t); | |
6c79e987 MS |
118 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
119 | } | |
120 | ||
1da177e4 | 121 | /* UDF filesystem type */ |
152a0836 AV |
122 | static struct dentry *udf_mount(struct file_system_type *fs_type, |
123 | int flags, const char *dev_name, void *data) | |
1da177e4 | 124 | { |
152a0836 | 125 | return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super); |
1da177e4 LT |
126 | } |
127 | ||
128 | static struct file_system_type udf_fstype = { | |
28de7948 CG |
129 | .owner = THIS_MODULE, |
130 | .name = "udf", | |
152a0836 | 131 | .mount = udf_mount, |
28de7948 CG |
132 | .kill_sb = kill_block_super, |
133 | .fs_flags = FS_REQUIRES_DEV, | |
1da177e4 | 134 | }; |
3e64fe5b | 135 | MODULE_ALIAS_FS("udf"); |
1da177e4 | 136 | |
cb00ea35 | 137 | static struct kmem_cache *udf_inode_cachep; |
1da177e4 LT |
138 | |
139 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
140 | { | |
141 | struct udf_inode_info *ei; | |
3a71fc5d | 142 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
143 | if (!ei) |
144 | return NULL; | |
95f8797f DB |
145 | |
146 | ei->i_unique = 0; | |
147 | ei->i_lenExtents = 0; | |
148 | ei->i_next_alloc_block = 0; | |
149 | ei->i_next_alloc_goal = 0; | |
150 | ei->i_strat4096 = 0; | |
4d0fb621 | 151 | init_rwsem(&ei->i_data_sem); |
99600051 NJ |
152 | ei->cached_extent.lstart = -1; |
153 | spin_lock_init(&ei->i_extent_cache_lock); | |
95f8797f | 154 | |
1da177e4 LT |
155 | return &ei->vfs_inode; |
156 | } | |
157 | ||
fa0d7e3d | 158 | static void udf_i_callback(struct rcu_head *head) |
1da177e4 | 159 | { |
fa0d7e3d | 160 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
161 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); |
162 | } | |
163 | ||
fa0d7e3d NP |
164 | static void udf_destroy_inode(struct inode *inode) |
165 | { | |
166 | call_rcu(&inode->i_rcu, udf_i_callback); | |
167 | } | |
168 | ||
51cc5068 | 169 | static void init_once(void *foo) |
1da177e4 | 170 | { |
cb00ea35 | 171 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 172 | |
a35afb83 CL |
173 | ei->i_ext.i_data = NULL; |
174 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
175 | } |
176 | ||
53ea18de | 177 | static int __init init_inodecache(void) |
1da177e4 LT |
178 | { |
179 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
180 | sizeof(struct udf_inode_info), | |
cb00ea35 CG |
181 | 0, (SLAB_RECLAIM_ACCOUNT | |
182 | SLAB_MEM_SPREAD), | |
20c2df83 | 183 | init_once); |
28de7948 | 184 | if (!udf_inode_cachep) |
1da177e4 LT |
185 | return -ENOMEM; |
186 | return 0; | |
187 | } | |
188 | ||
189 | static void destroy_inodecache(void) | |
190 | { | |
8c0a8537 KS |
191 | /* |
192 | * Make sure all delayed rcu free inodes are flushed before we | |
193 | * destroy cache. | |
194 | */ | |
195 | rcu_barrier(); | |
1a1d92c1 | 196 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
197 | } |
198 | ||
199 | /* Superblock operations */ | |
ee9b6d61 | 200 | static const struct super_operations udf_sb_ops = { |
28de7948 CG |
201 | .alloc_inode = udf_alloc_inode, |
202 | .destroy_inode = udf_destroy_inode, | |
203 | .write_inode = udf_write_inode, | |
3aac2b62 | 204 | .evict_inode = udf_evict_inode, |
28de7948 | 205 | .put_super = udf_put_super, |
146bca72 | 206 | .sync_fs = udf_sync_fs, |
28de7948 CG |
207 | .statfs = udf_statfs, |
208 | .remount_fs = udf_remount_fs, | |
6da80894 | 209 | .show_options = udf_show_options, |
1da177e4 LT |
210 | }; |
211 | ||
cb00ea35 | 212 | struct udf_options { |
1da177e4 LT |
213 | unsigned char novrs; |
214 | unsigned int blocksize; | |
215 | unsigned int session; | |
216 | unsigned int lastblock; | |
217 | unsigned int anchor; | |
218 | unsigned int volume; | |
219 | unsigned short partition; | |
220 | unsigned int fileset; | |
221 | unsigned int rootdir; | |
222 | unsigned int flags; | |
faa17292 | 223 | umode_t umask; |
c2ba138a EB |
224 | kgid_t gid; |
225 | kuid_t uid; | |
faa17292 AV |
226 | umode_t fmode; |
227 | umode_t dmode; | |
1da177e4 LT |
228 | struct nls_table *nls_map; |
229 | }; | |
230 | ||
231 | static int __init init_udf_fs(void) | |
232 | { | |
233 | int err; | |
28de7948 | 234 | |
1da177e4 LT |
235 | err = init_inodecache(); |
236 | if (err) | |
237 | goto out1; | |
238 | err = register_filesystem(&udf_fstype); | |
239 | if (err) | |
240 | goto out; | |
28de7948 | 241 | |
1da177e4 | 242 | return 0; |
28de7948 CG |
243 | |
244 | out: | |
1da177e4 | 245 | destroy_inodecache(); |
28de7948 CG |
246 | |
247 | out1: | |
1da177e4 LT |
248 | return err; |
249 | } | |
250 | ||
251 | static void __exit exit_udf_fs(void) | |
252 | { | |
253 | unregister_filesystem(&udf_fstype); | |
254 | destroy_inodecache(); | |
255 | } | |
256 | ||
257 | module_init(init_udf_fs) | |
28de7948 | 258 | module_exit(exit_udf_fs) |
1da177e4 | 259 | |
dc5d39be MS |
260 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
261 | { | |
262 | struct udf_sb_info *sbi = UDF_SB(sb); | |
263 | ||
264 | sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), | |
265 | GFP_KERNEL); | |
266 | if (!sbi->s_partmaps) { | |
8076c363 JP |
267 | udf_err(sb, "Unable to allocate space for %d partition maps\n", |
268 | count); | |
dc5d39be MS |
269 | sbi->s_partitions = 0; |
270 | return -ENOMEM; | |
271 | } | |
272 | ||
273 | sbi->s_partitions = count; | |
274 | return 0; | |
275 | } | |
276 | ||
bff943af JK |
277 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
278 | { | |
279 | int i; | |
280 | int nr_groups = bitmap->s_nr_groups; | |
281 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * | |
282 | nr_groups); | |
283 | ||
284 | for (i = 0; i < nr_groups; i++) | |
285 | if (bitmap->s_block_bitmap[i]) | |
286 | brelse(bitmap->s_block_bitmap[i]); | |
287 | ||
288 | if (size <= PAGE_SIZE) | |
289 | kfree(bitmap); | |
290 | else | |
291 | vfree(bitmap); | |
292 | } | |
293 | ||
294 | static void udf_free_partition(struct udf_part_map *map) | |
295 | { | |
296 | int i; | |
297 | struct udf_meta_data *mdata; | |
298 | ||
299 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
300 | iput(map->s_uspace.s_table); | |
301 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
302 | iput(map->s_fspace.s_table); | |
303 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
304 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
305 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) | |
306 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); | |
307 | if (map->s_partition_type == UDF_SPARABLE_MAP15) | |
308 | for (i = 0; i < 4; i++) | |
309 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
310 | else if (map->s_partition_type == UDF_METADATA_MAP25) { | |
311 | mdata = &map->s_type_specific.s_metadata; | |
312 | iput(mdata->s_metadata_fe); | |
313 | mdata->s_metadata_fe = NULL; | |
314 | ||
315 | iput(mdata->s_mirror_fe); | |
316 | mdata->s_mirror_fe = NULL; | |
317 | ||
318 | iput(mdata->s_bitmap_fe); | |
319 | mdata->s_bitmap_fe = NULL; | |
320 | } | |
321 | } | |
322 | ||
323 | static void udf_sb_free_partitions(struct super_block *sb) | |
324 | { | |
325 | struct udf_sb_info *sbi = UDF_SB(sb); | |
326 | int i; | |
1b1baff6 NJ |
327 | if (sbi->s_partmaps == NULL) |
328 | return; | |
bff943af JK |
329 | for (i = 0; i < sbi->s_partitions; i++) |
330 | udf_free_partition(&sbi->s_partmaps[i]); | |
331 | kfree(sbi->s_partmaps); | |
332 | sbi->s_partmaps = NULL; | |
333 | } | |
334 | ||
34c80b1d | 335 | static int udf_show_options(struct seq_file *seq, struct dentry *root) |
6da80894 | 336 | { |
34c80b1d | 337 | struct super_block *sb = root->d_sb; |
6da80894 MS |
338 | struct udf_sb_info *sbi = UDF_SB(sb); |
339 | ||
340 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
341 | seq_puts(seq, ",nostrict"); | |
1197e4df | 342 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) |
6da80894 MS |
343 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); |
344 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
345 | seq_puts(seq, ",unhide"); | |
346 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
347 | seq_puts(seq, ",undelete"); | |
348 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
349 | seq_puts(seq, ",noadinicb"); | |
350 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
351 | seq_puts(seq, ",shortad"); | |
352 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
353 | seq_puts(seq, ",uid=forget"); | |
354 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) | |
355 | seq_puts(seq, ",uid=ignore"); | |
356 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) | |
357 | seq_puts(seq, ",gid=forget"); | |
358 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) | |
359 | seq_puts(seq, ",gid=ignore"); | |
360 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) | |
c2ba138a | 361 | seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid)); |
6da80894 | 362 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) |
c2ba138a | 363 | seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid)); |
6da80894 | 364 | if (sbi->s_umask != 0) |
faa17292 | 365 | seq_printf(seq, ",umask=%ho", sbi->s_umask); |
87bc730c | 366 | if (sbi->s_fmode != UDF_INVALID_MODE) |
faa17292 | 367 | seq_printf(seq, ",mode=%ho", sbi->s_fmode); |
87bc730c | 368 | if (sbi->s_dmode != UDF_INVALID_MODE) |
faa17292 | 369 | seq_printf(seq, ",dmode=%ho", sbi->s_dmode); |
6da80894 MS |
370 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) |
371 | seq_printf(seq, ",session=%u", sbi->s_session); | |
372 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) | |
373 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
40346005 JK |
374 | if (sbi->s_anchor != 0) |
375 | seq_printf(seq, ",anchor=%u", sbi->s_anchor); | |
6da80894 MS |
376 | /* |
377 | * volume, partition, fileset and rootdir seem to be ignored | |
378 | * currently | |
379 | */ | |
380 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) | |
381 | seq_puts(seq, ",utf8"); | |
382 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
383 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
384 | ||
385 | return 0; | |
386 | } | |
387 | ||
1da177e4 LT |
388 | /* |
389 | * udf_parse_options | |
390 | * | |
391 | * PURPOSE | |
392 | * Parse mount options. | |
393 | * | |
394 | * DESCRIPTION | |
395 | * The following mount options are supported: | |
396 | * | |
397 | * gid= Set the default group. | |
398 | * umask= Set the default umask. | |
7ac9bcd5 MS |
399 | * mode= Set the default file permissions. |
400 | * dmode= Set the default directory permissions. | |
1da177e4 LT |
401 | * uid= Set the default user. |
402 | * bs= Set the block size. | |
403 | * unhide Show otherwise hidden files. | |
404 | * undelete Show deleted files in lists. | |
405 | * adinicb Embed data in the inode (default) | |
406 | * noadinicb Don't embed data in the inode | |
407 | * shortad Use short ad's | |
408 | * longad Use long ad's (default) | |
409 | * nostrict Unset strict conformance | |
410 | * iocharset= Set the NLS character set | |
411 | * | |
412 | * The remaining are for debugging and disaster recovery: | |
413 | * | |
28de7948 | 414 | * novrs Skip volume sequence recognition |
1da177e4 LT |
415 | * |
416 | * The following expect a offset from 0. | |
417 | * | |
418 | * session= Set the CDROM session (default= last session) | |
419 | * anchor= Override standard anchor location. (default= 256) | |
420 | * volume= Override the VolumeDesc location. (unused) | |
421 | * partition= Override the PartitionDesc location. (unused) | |
422 | * lastblock= Set the last block of the filesystem/ | |
423 | * | |
424 | * The following expect a offset from the partition root. | |
425 | * | |
426 | * fileset= Override the fileset block location. (unused) | |
427 | * rootdir= Override the root directory location. (unused) | |
428 | * WARNING: overriding the rootdir to a non-directory may | |
429 | * yield highly unpredictable results. | |
430 | * | |
431 | * PRE-CONDITIONS | |
432 | * options Pointer to mount options string. | |
433 | * uopts Pointer to mount options variable. | |
434 | * | |
435 | * POST-CONDITIONS | |
436 | * <return> 1 Mount options parsed okay. | |
437 | * <return> 0 Error parsing mount options. | |
438 | * | |
439 | * HISTORY | |
440 | * July 1, 1997 - Andrew E. Mileski | |
441 | * Written, tested, and released. | |
442 | */ | |
28de7948 | 443 | |
1da177e4 LT |
444 | enum { |
445 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
446 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
447 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
448 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
449 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
7ac9bcd5 MS |
450 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, |
451 | Opt_fmode, Opt_dmode | |
1da177e4 LT |
452 | }; |
453 | ||
a447c093 | 454 | static const match_table_t tokens = { |
28de7948 CG |
455 | {Opt_novrs, "novrs"}, |
456 | {Opt_nostrict, "nostrict"}, | |
457 | {Opt_bs, "bs=%u"}, | |
458 | {Opt_unhide, "unhide"}, | |
459 | {Opt_undelete, "undelete"}, | |
460 | {Opt_noadinicb, "noadinicb"}, | |
461 | {Opt_adinicb, "adinicb"}, | |
462 | {Opt_shortad, "shortad"}, | |
463 | {Opt_longad, "longad"}, | |
464 | {Opt_uforget, "uid=forget"}, | |
465 | {Opt_uignore, "uid=ignore"}, | |
466 | {Opt_gforget, "gid=forget"}, | |
467 | {Opt_gignore, "gid=ignore"}, | |
468 | {Opt_gid, "gid=%u"}, | |
469 | {Opt_uid, "uid=%u"}, | |
470 | {Opt_umask, "umask=%o"}, | |
471 | {Opt_session, "session=%u"}, | |
472 | {Opt_lastblock, "lastblock=%u"}, | |
473 | {Opt_anchor, "anchor=%u"}, | |
474 | {Opt_volume, "volume=%u"}, | |
475 | {Opt_partition, "partition=%u"}, | |
476 | {Opt_fileset, "fileset=%u"}, | |
477 | {Opt_rootdir, "rootdir=%u"}, | |
478 | {Opt_utf8, "utf8"}, | |
479 | {Opt_iocharset, "iocharset=%s"}, | |
7ac9bcd5 MS |
480 | {Opt_fmode, "mode=%o"}, |
481 | {Opt_dmode, "dmode=%o"}, | |
28de7948 | 482 | {Opt_err, NULL} |
1da177e4 LT |
483 | }; |
484 | ||
6da80894 MS |
485 | static int udf_parse_options(char *options, struct udf_options *uopt, |
486 | bool remount) | |
1da177e4 LT |
487 | { |
488 | char *p; | |
489 | int option; | |
490 | ||
491 | uopt->novrs = 0; | |
1da177e4 LT |
492 | uopt->partition = 0xFFFF; |
493 | uopt->session = 0xFFFFFFFF; | |
494 | uopt->lastblock = 0; | |
495 | uopt->anchor = 0; | |
496 | uopt->volume = 0xFFFFFFFF; | |
497 | uopt->rootdir = 0xFFFFFFFF; | |
498 | uopt->fileset = 0xFFFFFFFF; | |
499 | uopt->nls_map = NULL; | |
500 | ||
501 | if (!options) | |
502 | return 1; | |
503 | ||
cb00ea35 | 504 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
505 | substring_t args[MAX_OPT_ARGS]; |
506 | int token; | |
8c6915ae | 507 | unsigned n; |
1da177e4 LT |
508 | if (!*p) |
509 | continue; | |
510 | ||
511 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
512 | switch (token) { |
513 | case Opt_novrs: | |
514 | uopt->novrs = 1; | |
4136801a | 515 | break; |
cb00ea35 CG |
516 | case Opt_bs: |
517 | if (match_int(&args[0], &option)) | |
518 | return 0; | |
8c6915ae FF |
519 | n = option; |
520 | if (n != 512 && n != 1024 && n != 2048 && n != 4096) | |
521 | return 0; | |
522 | uopt->blocksize = n; | |
1197e4df | 523 | uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); |
cb00ea35 CG |
524 | break; |
525 | case Opt_unhide: | |
526 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
527 | break; | |
528 | case Opt_undelete: | |
529 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
530 | break; | |
531 | case Opt_noadinicb: | |
532 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
533 | break; | |
534 | case Opt_adinicb: | |
535 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
536 | break; | |
537 | case Opt_shortad: | |
538 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
539 | break; | |
540 | case Opt_longad: | |
541 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
542 | break; | |
543 | case Opt_gid: | |
544 | if (match_int(args, &option)) | |
545 | return 0; | |
c2ba138a EB |
546 | uopt->gid = make_kgid(current_user_ns(), option); |
547 | if (!gid_valid(uopt->gid)) | |
548 | return 0; | |
ca76d2d8 | 549 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
550 | break; |
551 | case Opt_uid: | |
552 | if (match_int(args, &option)) | |
553 | return 0; | |
c2ba138a EB |
554 | uopt->uid = make_kuid(current_user_ns(), option); |
555 | if (!uid_valid(uopt->uid)) | |
556 | return 0; | |
ca76d2d8 | 557 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
558 | break; |
559 | case Opt_umask: | |
560 | if (match_octal(args, &option)) | |
561 | return 0; | |
562 | uopt->umask = option; | |
563 | break; | |
564 | case Opt_nostrict: | |
565 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
566 | break; | |
567 | case Opt_session: | |
568 | if (match_int(args, &option)) | |
569 | return 0; | |
570 | uopt->session = option; | |
6da80894 MS |
571 | if (!remount) |
572 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
573 | break; |
574 | case Opt_lastblock: | |
575 | if (match_int(args, &option)) | |
576 | return 0; | |
577 | uopt->lastblock = option; | |
6da80894 MS |
578 | if (!remount) |
579 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
580 | break; |
581 | case Opt_anchor: | |
582 | if (match_int(args, &option)) | |
583 | return 0; | |
584 | uopt->anchor = option; | |
585 | break; | |
586 | case Opt_volume: | |
587 | if (match_int(args, &option)) | |
588 | return 0; | |
589 | uopt->volume = option; | |
590 | break; | |
591 | case Opt_partition: | |
592 | if (match_int(args, &option)) | |
593 | return 0; | |
594 | uopt->partition = option; | |
595 | break; | |
596 | case Opt_fileset: | |
597 | if (match_int(args, &option)) | |
598 | return 0; | |
599 | uopt->fileset = option; | |
600 | break; | |
601 | case Opt_rootdir: | |
602 | if (match_int(args, &option)) | |
603 | return 0; | |
604 | uopt->rootdir = option; | |
605 | break; | |
606 | case Opt_utf8: | |
607 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
608 | break; | |
1da177e4 | 609 | #ifdef CONFIG_UDF_NLS |
cb00ea35 CG |
610 | case Opt_iocharset: |
611 | uopt->nls_map = load_nls(args[0].from); | |
612 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
613 | break; | |
1da177e4 | 614 | #endif |
cb00ea35 CG |
615 | case Opt_uignore: |
616 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); | |
617 | break; | |
618 | case Opt_uforget: | |
619 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
620 | break; | |
621 | case Opt_gignore: | |
622 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); | |
623 | break; | |
624 | case Opt_gforget: | |
625 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
626 | break; | |
7ac9bcd5 MS |
627 | case Opt_fmode: |
628 | if (match_octal(args, &option)) | |
629 | return 0; | |
630 | uopt->fmode = option & 0777; | |
631 | break; | |
632 | case Opt_dmode: | |
633 | if (match_octal(args, &option)) | |
634 | return 0; | |
635 | uopt->dmode = option & 0777; | |
636 | break; | |
cb00ea35 | 637 | default: |
78ace70c | 638 | pr_err("bad mount option \"%s\" or missing value\n", p); |
1da177e4 LT |
639 | return 0; |
640 | } | |
641 | } | |
642 | return 1; | |
643 | } | |
644 | ||
cb00ea35 | 645 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
646 | { |
647 | struct udf_options uopt; | |
6c79e987 | 648 | struct udf_sb_info *sbi = UDF_SB(sb); |
c79d967d | 649 | int error = 0; |
69d75671 | 650 | struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb); |
1da177e4 | 651 | |
02b9984d | 652 | sync_filesystem(sb); |
69d75671 JK |
653 | if (lvidiu) { |
654 | int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
e729eac6 JK |
655 | if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY)) |
656 | return -EACCES; | |
657 | } | |
658 | ||
6c79e987 MS |
659 | uopt.flags = sbi->s_flags; |
660 | uopt.uid = sbi->s_uid; | |
661 | uopt.gid = sbi->s_gid; | |
662 | uopt.umask = sbi->s_umask; | |
7ac9bcd5 MS |
663 | uopt.fmode = sbi->s_fmode; |
664 | uopt.dmode = sbi->s_dmode; | |
1da177e4 | 665 | |
6da80894 | 666 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
667 | return -EINVAL; |
668 | ||
c03cad24 | 669 | write_lock(&sbi->s_cred_lock); |
6c79e987 MS |
670 | sbi->s_flags = uopt.flags; |
671 | sbi->s_uid = uopt.uid; | |
672 | sbi->s_gid = uopt.gid; | |
673 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
674 | sbi->s_fmode = uopt.fmode; |
675 | sbi->s_dmode = uopt.dmode; | |
c03cad24 | 676 | write_unlock(&sbi->s_cred_lock); |
1da177e4 | 677 | |
c79d967d CH |
678 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
679 | goto out_unlock; | |
680 | ||
36350462 | 681 | if (*flags & MS_RDONLY) |
1da177e4 | 682 | udf_close_lvid(sb); |
36350462 | 683 | else |
1da177e4 LT |
684 | udf_open_lvid(sb); |
685 | ||
c79d967d | 686 | out_unlock: |
c79d967d | 687 | return error; |
1da177e4 LT |
688 | } |
689 | ||
40346005 JK |
690 | /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ |
691 | /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
692 | static loff_t udf_check_vsd(struct super_block *sb) | |
1da177e4 LT |
693 | { |
694 | struct volStructDesc *vsd = NULL; | |
44499602 | 695 | loff_t sector = VSD_FIRST_SECTOR_OFFSET; |
1da177e4 LT |
696 | int sectorsize; |
697 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
698 | int nsr02 = 0; |
699 | int nsr03 = 0; | |
6c79e987 | 700 | struct udf_sb_info *sbi; |
1da177e4 | 701 | |
6c79e987 | 702 | sbi = UDF_SB(sb); |
1da177e4 LT |
703 | if (sb->s_blocksize < sizeof(struct volStructDesc)) |
704 | sectorsize = sizeof(struct volStructDesc); | |
705 | else | |
706 | sectorsize = sb->s_blocksize; | |
707 | ||
6c79e987 | 708 | sector += (sbi->s_session << sb->s_blocksize_bits); |
1da177e4 LT |
709 | |
710 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
706047a7 SM |
711 | (unsigned int)(sector >> sb->s_blocksize_bits), |
712 | sb->s_blocksize); | |
44499602 PF |
713 | /* Process the sequence (if applicable). The hard limit on the sector |
714 | * offset is arbitrary, hopefully large enough so that all valid UDF | |
715 | * filesystems will be recognised. There is no mention of an upper | |
716 | * bound to the size of the volume recognition area in the standard. | |
717 | * The limit will prevent the code to read all the sectors of a | |
718 | * specially crafted image (like a bluray disc full of CD001 sectors), | |
719 | * potentially causing minutes or even hours of uninterruptible I/O | |
720 | * activity. This actually happened with uninitialised SSD partitions | |
721 | * (all 0xFF) before the check for the limit and all valid IDs were | |
722 | * added */ | |
723 | for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET; | |
724 | sector += sectorsize) { | |
1da177e4 LT |
725 | /* Read a block */ |
726 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
727 | if (!bh) | |
728 | break; | |
729 | ||
730 | /* Look for ISO descriptors */ | |
731 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 732 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 733 | |
44499602 | 734 | if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
3a71fc5d | 735 | VSD_STD_ID_LEN)) { |
cb00ea35 CG |
736 | switch (vsd->structType) { |
737 | case 0: | |
738 | udf_debug("ISO9660 Boot Record found\n"); | |
739 | break; | |
740 | case 1: | |
a983f368 | 741 | udf_debug("ISO9660 Primary Volume Descriptor found\n"); |
cb00ea35 CG |
742 | break; |
743 | case 2: | |
a983f368 | 744 | udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); |
cb00ea35 CG |
745 | break; |
746 | case 3: | |
a983f368 | 747 | udf_debug("ISO9660 Volume Partition Descriptor found\n"); |
cb00ea35 CG |
748 | break; |
749 | case 255: | |
a983f368 | 750 | udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); |
cb00ea35 CG |
751 | break; |
752 | default: | |
753 | udf_debug("ISO9660 VRS (%u) found\n", | |
754 | vsd->structType); | |
755 | break; | |
1da177e4 | 756 | } |
3a71fc5d MS |
757 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
758 | VSD_STD_ID_LEN)) | |
759 | ; /* nothing */ | |
760 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
761 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 762 | brelse(bh); |
1da177e4 | 763 | break; |
3a71fc5d MS |
764 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
765 | VSD_STD_ID_LEN)) | |
1da177e4 | 766 | nsr02 = sector; |
3a71fc5d MS |
767 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
768 | VSD_STD_ID_LEN)) | |
1da177e4 | 769 | nsr03 = sector; |
44499602 PF |
770 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2, |
771 | VSD_STD_ID_LEN)) | |
772 | ; /* nothing */ | |
773 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02, | |
774 | VSD_STD_ID_LEN)) | |
775 | ; /* nothing */ | |
776 | else { | |
777 | /* invalid id : end of volume recognition area */ | |
778 | brelse(bh); | |
779 | break; | |
780 | } | |
3bf25cb4 | 781 | brelse(bh); |
1da177e4 LT |
782 | } |
783 | ||
784 | if (nsr03) | |
785 | return nsr03; | |
786 | else if (nsr02) | |
787 | return nsr02; | |
44499602 PF |
788 | else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) == |
789 | VSD_FIRST_SECTOR_OFFSET) | |
1da177e4 LT |
790 | return -1; |
791 | else | |
792 | return 0; | |
793 | } | |
794 | ||
3a71fc5d | 795 | static int udf_find_fileset(struct super_block *sb, |
5ca4e4be PE |
796 | struct kernel_lb_addr *fileset, |
797 | struct kernel_lb_addr *root) | |
1da177e4 LT |
798 | { |
799 | struct buffer_head *bh = NULL; | |
800 | long lastblock; | |
801 | uint16_t ident; | |
6c79e987 | 802 | struct udf_sb_info *sbi; |
1da177e4 LT |
803 | |
804 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 805 | fileset->partitionReferenceNum != 0xFFFF) { |
97e961fd | 806 | bh = udf_read_ptagged(sb, fileset, 0, &ident); |
1da177e4 | 807 | |
28de7948 | 808 | if (!bh) { |
1da177e4 | 809 | return 1; |
28de7948 | 810 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 811 | brelse(bh); |
1da177e4 LT |
812 | return 1; |
813 | } | |
cb00ea35 | 814 | |
1da177e4 LT |
815 | } |
816 | ||
6c79e987 | 817 | sbi = UDF_SB(sb); |
3a71fc5d MS |
818 | if (!bh) { |
819 | /* Search backwards through the partitions */ | |
5ca4e4be | 820 | struct kernel_lb_addr newfileset; |
1da177e4 | 821 | |
28de7948 | 822 | /* --> cvg: FIXME - is it reasonable? */ |
1da177e4 | 823 | return 1; |
cb00ea35 | 824 | |
6c79e987 | 825 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
cb00ea35 CG |
826 | (newfileset.partitionReferenceNum != 0xFFFF && |
827 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
828 | fileset->partitionReferenceNum == 0xFFFF); | |
829 | newfileset.partitionReferenceNum--) { | |
6c79e987 MS |
830 | lastblock = sbi->s_partmaps |
831 | [newfileset.partitionReferenceNum] | |
832 | .s_partition_len; | |
1da177e4 LT |
833 | newfileset.logicalBlockNum = 0; |
834 | ||
cb00ea35 | 835 | do { |
97e961fd | 836 | bh = udf_read_ptagged(sb, &newfileset, 0, |
3a71fc5d | 837 | &ident); |
cb00ea35 CG |
838 | if (!bh) { |
839 | newfileset.logicalBlockNum++; | |
1da177e4 LT |
840 | continue; |
841 | } | |
842 | ||
cb00ea35 CG |
843 | switch (ident) { |
844 | case TAG_IDENT_SBD: | |
28de7948 CG |
845 | { |
846 | struct spaceBitmapDesc *sp; | |
4b11111a MS |
847 | sp = (struct spaceBitmapDesc *) |
848 | bh->b_data; | |
28de7948 CG |
849 | newfileset.logicalBlockNum += 1 + |
850 | ((le32_to_cpu(sp->numOfBytes) + | |
4b11111a MS |
851 | sizeof(struct spaceBitmapDesc) |
852 | - 1) >> sb->s_blocksize_bits); | |
28de7948 CG |
853 | brelse(bh); |
854 | break; | |
855 | } | |
cb00ea35 | 856 | case TAG_IDENT_FSD: |
28de7948 CG |
857 | *fileset = newfileset; |
858 | break; | |
cb00ea35 | 859 | default: |
28de7948 CG |
860 | newfileset.logicalBlockNum++; |
861 | brelse(bh); | |
862 | bh = NULL; | |
863 | break; | |
1da177e4 | 864 | } |
28de7948 CG |
865 | } while (newfileset.logicalBlockNum < lastblock && |
866 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
867 | fileset->partitionReferenceNum == 0xFFFF); | |
1da177e4 LT |
868 | } |
869 | } | |
870 | ||
871 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 872 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
1da177e4 | 873 | udf_debug("Fileset at block=%d, partition=%d\n", |
cb00ea35 CG |
874 | fileset->logicalBlockNum, |
875 | fileset->partitionReferenceNum); | |
1da177e4 | 876 | |
6c79e987 | 877 | sbi->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 878 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 879 | brelse(bh); |
1da177e4 LT |
880 | return 0; |
881 | } | |
882 | return 1; | |
883 | } | |
884 | ||
d759bfa4 JK |
885 | /* |
886 | * Load primary Volume Descriptor Sequence | |
887 | * | |
888 | * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence | |
889 | * should be tried. | |
890 | */ | |
c0eb31ed | 891 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
892 | { |
893 | struct primaryVolDesc *pvoldesc; | |
ba9aadd8 | 894 | struct ustr *instr, *outstr; |
c0eb31ed JK |
895 | struct buffer_head *bh; |
896 | uint16_t ident; | |
d759bfa4 | 897 | int ret = -ENOMEM; |
ba9aadd8 MS |
898 | |
899 | instr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
900 | if (!instr) | |
d759bfa4 | 901 | return -ENOMEM; |
ba9aadd8 MS |
902 | |
903 | outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
904 | if (!outstr) | |
905 | goto out1; | |
c0eb31ed JK |
906 | |
907 | bh = udf_read_tagged(sb, block, block, &ident); | |
d759bfa4 JK |
908 | if (!bh) { |
909 | ret = -EAGAIN; | |
ba9aadd8 | 910 | goto out2; |
d759bfa4 | 911 | } |
ba9aadd8 | 912 | |
d759bfa4 JK |
913 | if (ident != TAG_IDENT_PVD) { |
914 | ret = -EIO; | |
915 | goto out_bh; | |
916 | } | |
1da177e4 LT |
917 | |
918 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
919 | ||
56774805 MS |
920 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
921 | pvoldesc->recordingDateAndTime)) { | |
af15a298 | 922 | #ifdef UDFFS_DEBUG |
5ca4e4be | 923 | struct timestamp *ts = &pvoldesc->recordingDateAndTime; |
a983f368 | 924 | udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", |
af15a298 MS |
925 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, |
926 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
927 | #endif | |
1da177e4 LT |
928 | } |
929 | ||
e9d4cf41 FF |
930 | if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) { |
931 | ret = udf_CS0toUTF8(outstr, instr); | |
932 | if (ret < 0) | |
933 | goto out_bh; | |
934 | ||
935 | strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, | |
936 | outstr->u_len > 31 ? 31 : outstr->u_len); | |
937 | udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident); | |
938 | } | |
1da177e4 | 939 | |
792352cb | 940 | if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) { |
e9d4cf41 FF |
941 | ret = udf_CS0toUTF8(outstr, instr); |
942 | if (ret < 0) | |
943 | goto out_bh; | |
944 | ||
945 | udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); | |
792352cb | 946 | } |
c0eb31ed | 947 | |
ba9aadd8 | 948 | ret = 0; |
d759bfa4 JK |
949 | out_bh: |
950 | brelse(bh); | |
ba9aadd8 MS |
951 | out2: |
952 | kfree(outstr); | |
953 | out1: | |
954 | kfree(instr); | |
955 | return ret; | |
1da177e4 LT |
956 | } |
957 | ||
3080a74e NJ |
958 | struct inode *udf_find_metadata_inode_efe(struct super_block *sb, |
959 | u32 meta_file_loc, u32 partition_num) | |
960 | { | |
961 | struct kernel_lb_addr addr; | |
962 | struct inode *metadata_fe; | |
963 | ||
964 | addr.logicalBlockNum = meta_file_loc; | |
965 | addr.partitionReferenceNum = partition_num; | |
966 | ||
6174c2eb | 967 | metadata_fe = udf_iget_special(sb, &addr); |
3080a74e | 968 | |
6d3d5e86 | 969 | if (IS_ERR(metadata_fe)) { |
3080a74e | 970 | udf_warn(sb, "metadata inode efe not found\n"); |
6d3d5e86 JK |
971 | return metadata_fe; |
972 | } | |
973 | if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { | |
3080a74e NJ |
974 | udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); |
975 | iput(metadata_fe); | |
6d3d5e86 | 976 | return ERR_PTR(-EIO); |
3080a74e NJ |
977 | } |
978 | ||
979 | return metadata_fe; | |
980 | } | |
981 | ||
bfb257a5 JK |
982 | static int udf_load_metadata_files(struct super_block *sb, int partition) |
983 | { | |
984 | struct udf_sb_info *sbi = UDF_SB(sb); | |
985 | struct udf_part_map *map; | |
986 | struct udf_meta_data *mdata; | |
5ca4e4be | 987 | struct kernel_lb_addr addr; |
6d3d5e86 | 988 | struct inode *fe; |
bfb257a5 JK |
989 | |
990 | map = &sbi->s_partmaps[partition]; | |
991 | mdata = &map->s_type_specific.s_metadata; | |
992 | ||
993 | /* metadata address */ | |
bfb257a5 | 994 | udf_debug("Metadata file location: block = %d part = %d\n", |
3080a74e | 995 | mdata->s_meta_file_loc, map->s_partition_num); |
bfb257a5 | 996 | |
6d3d5e86 JK |
997 | fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc, |
998 | map->s_partition_num); | |
999 | if (IS_ERR(fe)) { | |
3080a74e NJ |
1000 | /* mirror file entry */ |
1001 | udf_debug("Mirror metadata file location: block = %d part = %d\n", | |
1002 | mdata->s_mirror_file_loc, map->s_partition_num); | |
bfb257a5 | 1003 | |
6d3d5e86 JK |
1004 | fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc, |
1005 | map->s_partition_num); | |
bfb257a5 | 1006 | |
6d3d5e86 | 1007 | if (IS_ERR(fe)) { |
3080a74e | 1008 | udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); |
6d3d5e86 | 1009 | return PTR_ERR(fe); |
3080a74e | 1010 | } |
6d3d5e86 JK |
1011 | mdata->s_mirror_fe = fe; |
1012 | } else | |
1013 | mdata->s_metadata_fe = fe; | |
1014 | ||
bfb257a5 JK |
1015 | |
1016 | /* | |
1017 | * bitmap file entry | |
1018 | * Note: | |
1019 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) | |
1020 | */ | |
1021 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { | |
1022 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; | |
1023 | addr.partitionReferenceNum = map->s_partition_num; | |
1024 | ||
1025 | udf_debug("Bitmap file location: block = %d part = %d\n", | |
a983f368 | 1026 | addr.logicalBlockNum, addr.partitionReferenceNum); |
bfb257a5 | 1027 | |
6174c2eb | 1028 | fe = udf_iget_special(sb, &addr); |
6d3d5e86 | 1029 | if (IS_ERR(fe)) { |
bfb257a5 | 1030 | if (sb->s_flags & MS_RDONLY) |
a40ecd7b | 1031 | udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); |
bfb257a5 | 1032 | else { |
8076c363 | 1033 | udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); |
6d3d5e86 | 1034 | return PTR_ERR(fe); |
bfb257a5 | 1035 | } |
6d3d5e86 JK |
1036 | } else |
1037 | mdata->s_bitmap_fe = fe; | |
bfb257a5 JK |
1038 | } |
1039 | ||
1040 | udf_debug("udf_load_metadata_files Ok\n"); | |
bfb257a5 | 1041 | return 0; |
bfb257a5 JK |
1042 | } |
1043 | ||
28de7948 | 1044 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
5ca4e4be | 1045 | struct kernel_lb_addr *root) |
1da177e4 LT |
1046 | { |
1047 | struct fileSetDesc *fset; | |
1048 | ||
1049 | fset = (struct fileSetDesc *)bh->b_data; | |
1050 | ||
1051 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
1052 | ||
6c79e987 | 1053 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 1054 | |
cb00ea35 CG |
1055 | udf_debug("Rootdir at block=%d, partition=%d\n", |
1056 | root->logicalBlockNum, root->partitionReferenceNum); | |
1da177e4 LT |
1057 | } |
1058 | ||
883cb9d1 MS |
1059 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
1060 | { | |
1061 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
1062 | return DIV_ROUND_UP(map->s_partition_len + |
1063 | (sizeof(struct spaceBitmapDesc) << 3), | |
1064 | sb->s_blocksize * 8); | |
883cb9d1 MS |
1065 | } |
1066 | ||
66e1da3f MS |
1067 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
1068 | { | |
66e1da3f MS |
1069 | struct udf_bitmap *bitmap; |
1070 | int nr_groups; | |
1071 | int size; | |
1072 | ||
883cb9d1 | 1073 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
1074 | size = sizeof(struct udf_bitmap) + |
1075 | (sizeof(struct buffer_head *) * nr_groups); | |
1076 | ||
1077 | if (size <= PAGE_SIZE) | |
ed2ae6f6 | 1078 | bitmap = kzalloc(size, GFP_KERNEL); |
66e1da3f | 1079 | else |
ed2ae6f6 | 1080 | bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ |
66e1da3f | 1081 | |
75b09e02 | 1082 | if (bitmap == NULL) |
66e1da3f | 1083 | return NULL; |
66e1da3f | 1084 | |
66e1da3f MS |
1085 | bitmap->s_nr_groups = nr_groups; |
1086 | return bitmap; | |
1087 | } | |
1088 | ||
3fb38dfa JK |
1089 | static int udf_fill_partdesc_info(struct super_block *sb, |
1090 | struct partitionDesc *p, int p_index) | |
1da177e4 | 1091 | { |
6c79e987 | 1092 | struct udf_part_map *map; |
165923fa | 1093 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 1094 | struct partitionHeaderDesc *phd; |
165923fa | 1095 | |
3fb38dfa | 1096 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
1097 | |
1098 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
1099 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
1100 | ||
1101 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
1102 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
1103 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
1104 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
1105 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
1106 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
1107 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
1108 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
1109 | ||
a983f368 JP |
1110 | udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n", |
1111 | p_index, map->s_partition_type, | |
1112 | map->s_partition_root, map->s_partition_len); | |
165923fa MS |
1113 | |
1114 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
1115 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
3fb38dfa | 1116 | return 0; |
165923fa MS |
1117 | |
1118 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1119 | if (phd->unallocSpaceTable.extLength) { | |
5ca4e4be | 1120 | struct kernel_lb_addr loc = { |
165923fa MS |
1121 | .logicalBlockNum = le32_to_cpu( |
1122 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 1123 | .partitionReferenceNum = p_index, |
165923fa | 1124 | }; |
6d3d5e86 | 1125 | struct inode *inode; |
165923fa | 1126 | |
6174c2eb | 1127 | inode = udf_iget_special(sb, &loc); |
6d3d5e86 | 1128 | if (IS_ERR(inode)) { |
165923fa | 1129 | udf_debug("cannot load unallocSpaceTable (part %d)\n", |
a983f368 | 1130 | p_index); |
6d3d5e86 | 1131 | return PTR_ERR(inode); |
165923fa | 1132 | } |
6d3d5e86 | 1133 | map->s_uspace.s_table = inode; |
165923fa MS |
1134 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; |
1135 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", | |
a983f368 | 1136 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1137 | } |
1138 | ||
1139 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1140 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1141 | if (!bitmap) | |
d759bfa4 | 1142 | return -ENOMEM; |
165923fa | 1143 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1144 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1145 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1146 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
a983f368 JP |
1147 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", |
1148 | p_index, bitmap->s_extPosition); | |
165923fa MS |
1149 | } |
1150 | ||
1151 | if (phd->partitionIntegrityTable.extLength) | |
3fb38dfa | 1152 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); |
165923fa MS |
1153 | |
1154 | if (phd->freedSpaceTable.extLength) { | |
5ca4e4be | 1155 | struct kernel_lb_addr loc = { |
165923fa MS |
1156 | .logicalBlockNum = le32_to_cpu( |
1157 | phd->freedSpaceTable.extPosition), | |
3fb38dfa | 1158 | .partitionReferenceNum = p_index, |
165923fa | 1159 | }; |
6d3d5e86 | 1160 | struct inode *inode; |
165923fa | 1161 | |
6174c2eb | 1162 | inode = udf_iget_special(sb, &loc); |
6d3d5e86 | 1163 | if (IS_ERR(inode)) { |
3fb38dfa | 1164 | udf_debug("cannot load freedSpaceTable (part %d)\n", |
a983f368 | 1165 | p_index); |
6d3d5e86 | 1166 | return PTR_ERR(inode); |
165923fa | 1167 | } |
6d3d5e86 | 1168 | map->s_fspace.s_table = inode; |
165923fa MS |
1169 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; |
1170 | udf_debug("freedSpaceTable (part %d) @ %ld\n", | |
a983f368 | 1171 | p_index, map->s_fspace.s_table->i_ino); |
165923fa MS |
1172 | } |
1173 | ||
1174 | if (phd->freedSpaceBitmap.extLength) { | |
3fb38dfa JK |
1175 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1176 | if (!bitmap) | |
d759bfa4 | 1177 | return -ENOMEM; |
165923fa | 1178 | map->s_fspace.s_bitmap = bitmap; |
2e0838fd | 1179 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1180 | phd->freedSpaceBitmap.extPosition); |
2e0838fd | 1181 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
a983f368 JP |
1182 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", |
1183 | p_index, bitmap->s_extPosition); | |
165923fa | 1184 | } |
3fb38dfa JK |
1185 | return 0; |
1186 | } | |
1187 | ||
e971b0b9 JK |
1188 | static void udf_find_vat_block(struct super_block *sb, int p_index, |
1189 | int type1_index, sector_t start_block) | |
38b74a53 JK |
1190 | { |
1191 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1192 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
e971b0b9 | 1193 | sector_t vat_block; |
5ca4e4be | 1194 | struct kernel_lb_addr ino; |
6d3d5e86 | 1195 | struct inode *inode; |
e971b0b9 JK |
1196 | |
1197 | /* | |
1198 | * VAT file entry is in the last recorded block. Some broken disks have | |
1199 | * it a few blocks before so try a bit harder... | |
1200 | */ | |
1201 | ino.partitionReferenceNum = type1_index; | |
1202 | for (vat_block = start_block; | |
1203 | vat_block >= map->s_partition_root && | |
6d3d5e86 | 1204 | vat_block >= start_block - 3; vat_block--) { |
e971b0b9 | 1205 | ino.logicalBlockNum = vat_block - map->s_partition_root; |
6174c2eb | 1206 | inode = udf_iget_special(sb, &ino); |
6d3d5e86 JK |
1207 | if (!IS_ERR(inode)) { |
1208 | sbi->s_vat_inode = inode; | |
1209 | break; | |
1210 | } | |
e971b0b9 JK |
1211 | } |
1212 | } | |
1213 | ||
1214 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) | |
1215 | { | |
1216 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1217 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
fa5e0815 JK |
1218 | struct buffer_head *bh = NULL; |
1219 | struct udf_inode_info *vati; | |
1220 | uint32_t pos; | |
1221 | struct virtualAllocationTable20 *vat20; | |
4bf17af0 | 1222 | sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; |
38b74a53 | 1223 | |
e971b0b9 | 1224 | udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); |
4bf17af0 JK |
1225 | if (!sbi->s_vat_inode && |
1226 | sbi->s_last_block != blocks - 1) { | |
78ace70c JP |
1227 | pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", |
1228 | (unsigned long)sbi->s_last_block, | |
1229 | (unsigned long)blocks - 1); | |
e971b0b9 | 1230 | udf_find_vat_block(sb, p_index, type1_index, blocks - 1); |
4bf17af0 | 1231 | } |
38b74a53 | 1232 | if (!sbi->s_vat_inode) |
d759bfa4 | 1233 | return -EIO; |
38b74a53 JK |
1234 | |
1235 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
47c9358a | 1236 | map->s_type_specific.s_virtual.s_start_offset = 0; |
38b74a53 JK |
1237 | map->s_type_specific.s_virtual.s_num_entries = |
1238 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1239 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
fa5e0815 JK |
1240 | vati = UDF_I(sbi->s_vat_inode); |
1241 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1242 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1243 | bh = sb_bread(sb, pos); | |
1244 | if (!bh) | |
d759bfa4 | 1245 | return -EIO; |
fa5e0815 JK |
1246 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; |
1247 | } else { | |
1248 | vat20 = (struct virtualAllocationTable20 *) | |
1249 | vati->i_ext.i_data; | |
1250 | } | |
38b74a53 | 1251 | |
38b74a53 | 1252 | map->s_type_specific.s_virtual.s_start_offset = |
47c9358a | 1253 | le16_to_cpu(vat20->lengthHeader); |
38b74a53 JK |
1254 | map->s_type_specific.s_virtual.s_num_entries = |
1255 | (sbi->s_vat_inode->i_size - | |
1256 | map->s_type_specific.s_virtual. | |
1257 | s_start_offset) >> 2; | |
1258 | brelse(bh); | |
1259 | } | |
1260 | return 0; | |
1261 | } | |
1262 | ||
d759bfa4 JK |
1263 | /* |
1264 | * Load partition descriptor block | |
1265 | * | |
1266 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor | |
1267 | * sequence. | |
1268 | */ | |
3fb38dfa JK |
1269 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
1270 | { | |
1271 | struct buffer_head *bh; | |
1272 | struct partitionDesc *p; | |
1273 | struct udf_part_map *map; | |
1274 | struct udf_sb_info *sbi = UDF_SB(sb); | |
38b74a53 | 1275 | int i, type1_idx; |
3fb38dfa JK |
1276 | uint16_t partitionNumber; |
1277 | uint16_t ident; | |
d759bfa4 | 1278 | int ret; |
3fb38dfa JK |
1279 | |
1280 | bh = udf_read_tagged(sb, block, block, &ident); | |
1281 | if (!bh) | |
d759bfa4 JK |
1282 | return -EAGAIN; |
1283 | if (ident != TAG_IDENT_PD) { | |
1284 | ret = 0; | |
3fb38dfa | 1285 | goto out_bh; |
d759bfa4 | 1286 | } |
3fb38dfa JK |
1287 | |
1288 | p = (struct partitionDesc *)bh->b_data; | |
1289 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
38b74a53 | 1290 | |
bfb257a5 | 1291 | /* First scan for TYPE1, SPARABLE and METADATA partitions */ |
3fb38dfa JK |
1292 | for (i = 0; i < sbi->s_partitions; i++) { |
1293 | map = &sbi->s_partmaps[i]; | |
1294 | udf_debug("Searching map: (%d == %d)\n", | |
1295 | map->s_partition_num, partitionNumber); | |
38b74a53 JK |
1296 | if (map->s_partition_num == partitionNumber && |
1297 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1298 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
3fb38dfa JK |
1299 | break; |
1300 | } | |
1301 | ||
38b74a53 | 1302 | if (i >= sbi->s_partitions) { |
3fb38dfa JK |
1303 | udf_debug("Partition (%d) not found in partition map\n", |
1304 | partitionNumber); | |
d759bfa4 | 1305 | ret = 0; |
3fb38dfa JK |
1306 | goto out_bh; |
1307 | } | |
165923fa | 1308 | |
3fb38dfa | 1309 | ret = udf_fill_partdesc_info(sb, p, i); |
d759bfa4 JK |
1310 | if (ret < 0) |
1311 | goto out_bh; | |
38b74a53 JK |
1312 | |
1313 | /* | |
bfb257a5 JK |
1314 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
1315 | * PHYSICAL partitions are already set up | |
38b74a53 JK |
1316 | */ |
1317 | type1_idx = i; | |
44499602 PF |
1318 | #ifdef UDFFS_DEBUG |
1319 | map = NULL; /* supress 'maybe used uninitialized' warning */ | |
1320 | #endif | |
38b74a53 JK |
1321 | for (i = 0; i < sbi->s_partitions; i++) { |
1322 | map = &sbi->s_partmaps[i]; | |
1323 | ||
1324 | if (map->s_partition_num == partitionNumber && | |
1325 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
bfb257a5 JK |
1326 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
1327 | map->s_partition_type == UDF_METADATA_MAP25)) | |
38b74a53 JK |
1328 | break; |
1329 | } | |
1330 | ||
d759bfa4 JK |
1331 | if (i >= sbi->s_partitions) { |
1332 | ret = 0; | |
38b74a53 | 1333 | goto out_bh; |
d759bfa4 | 1334 | } |
38b74a53 JK |
1335 | |
1336 | ret = udf_fill_partdesc_info(sb, p, i); | |
d759bfa4 | 1337 | if (ret < 0) |
38b74a53 JK |
1338 | goto out_bh; |
1339 | ||
bfb257a5 JK |
1340 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
1341 | ret = udf_load_metadata_files(sb, i); | |
d759bfa4 | 1342 | if (ret < 0) { |
78ace70c JP |
1343 | udf_err(sb, "error loading MetaData partition map %d\n", |
1344 | i); | |
bfb257a5 JK |
1345 | goto out_bh; |
1346 | } | |
1347 | } else { | |
e729eac6 JK |
1348 | /* |
1349 | * If we have a partition with virtual map, we don't handle | |
1350 | * writing to it (we overwrite blocks instead of relocating | |
1351 | * them). | |
1352 | */ | |
1353 | if (!(sb->s_flags & MS_RDONLY)) { | |
1354 | ret = -EACCES; | |
1355 | goto out_bh; | |
1356 | } | |
bfb257a5 | 1357 | ret = udf_load_vat(sb, i, type1_idx); |
d759bfa4 | 1358 | if (ret < 0) |
bfb257a5 | 1359 | goto out_bh; |
bfb257a5 | 1360 | } |
d759bfa4 | 1361 | ret = 0; |
c0eb31ed | 1362 | out_bh: |
2e0838fd | 1363 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1364 | brelse(bh); |
1365 | return ret; | |
1da177e4 LT |
1366 | } |
1367 | ||
1df2ae31 JK |
1368 | static int udf_load_sparable_map(struct super_block *sb, |
1369 | struct udf_part_map *map, | |
1370 | struct sparablePartitionMap *spm) | |
1371 | { | |
1372 | uint32_t loc; | |
1373 | uint16_t ident; | |
1374 | struct sparingTable *st; | |
1375 | struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing; | |
1376 | int i; | |
1377 | struct buffer_head *bh; | |
1378 | ||
1379 | map->s_partition_type = UDF_SPARABLE_MAP15; | |
1380 | sdata->s_packet_len = le16_to_cpu(spm->packetLength); | |
1381 | if (!is_power_of_2(sdata->s_packet_len)) { | |
1382 | udf_err(sb, "error loading logical volume descriptor: " | |
1383 | "Invalid packet length %u\n", | |
1384 | (unsigned)sdata->s_packet_len); | |
1385 | return -EIO; | |
1386 | } | |
1387 | if (spm->numSparingTables > 4) { | |
1388 | udf_err(sb, "error loading logical volume descriptor: " | |
1389 | "Too many sparing tables (%d)\n", | |
1390 | (int)spm->numSparingTables); | |
1391 | return -EIO; | |
1392 | } | |
1393 | ||
1394 | for (i = 0; i < spm->numSparingTables; i++) { | |
1395 | loc = le32_to_cpu(spm->locSparingTable[i]); | |
1396 | bh = udf_read_tagged(sb, loc, loc, &ident); | |
1397 | if (!bh) | |
1398 | continue; | |
1399 | ||
1400 | st = (struct sparingTable *)bh->b_data; | |
1401 | if (ident != 0 || | |
1402 | strncmp(st->sparingIdent.ident, UDF_ID_SPARING, | |
1403 | strlen(UDF_ID_SPARING)) || | |
1404 | sizeof(*st) + le16_to_cpu(st->reallocationTableLen) > | |
1405 | sb->s_blocksize) { | |
1406 | brelse(bh); | |
1407 | continue; | |
1408 | } | |
1409 | ||
1410 | sdata->s_spar_map[i] = bh; | |
1411 | } | |
1412 | map->s_partition_func = udf_get_pblock_spar15; | |
1413 | return 0; | |
1414 | } | |
1415 | ||
c0eb31ed | 1416 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
5ca4e4be | 1417 | struct kernel_lb_addr *fileset) |
1da177e4 LT |
1418 | { |
1419 | struct logicalVolDesc *lvd; | |
1df2ae31 | 1420 | int i, offset; |
1da177e4 | 1421 | uint8_t type; |
6c79e987 | 1422 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1423 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1424 | uint16_t ident; |
1425 | struct buffer_head *bh; | |
adee11b2 | 1426 | unsigned int table_len; |
d759bfa4 | 1427 | int ret; |
1da177e4 | 1428 | |
c0eb31ed JK |
1429 | bh = udf_read_tagged(sb, block, block, &ident); |
1430 | if (!bh) | |
d759bfa4 | 1431 | return -EAGAIN; |
c0eb31ed | 1432 | BUG_ON(ident != TAG_IDENT_LVD); |
1da177e4 | 1433 | lvd = (struct logicalVolDesc *)bh->b_data; |
adee11b2 | 1434 | table_len = le32_to_cpu(lvd->mapTableLength); |
57b9655d | 1435 | if (table_len > sb->s_blocksize - sizeof(*lvd)) { |
adee11b2 JK |
1436 | udf_err(sb, "error loading logical volume descriptor: " |
1437 | "Partition table too long (%u > %lu)\n", table_len, | |
1438 | sb->s_blocksize - sizeof(*lvd)); | |
d759bfa4 | 1439 | ret = -EIO; |
adee11b2 JK |
1440 | goto out_bh; |
1441 | } | |
1da177e4 | 1442 | |
cb14d340 JK |
1443 | ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
1444 | if (ret) | |
c0eb31ed | 1445 | goto out_bh; |
1da177e4 | 1446 | |
cb00ea35 | 1447 | for (i = 0, offset = 0; |
adee11b2 | 1448 | i < sbi->s_partitions && offset < table_len; |
4b11111a MS |
1449 | i++, offset += gpm->partitionMapLength) { |
1450 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1451 | gpm = (struct genericPartitionMap *) | |
1452 | &(lvd->partitionMaps[offset]); | |
1453 | type = gpm->partitionMapType; | |
cb00ea35 | 1454 | if (type == 1) { |
4b11111a MS |
1455 | struct genericPartitionMap1 *gpm1 = |
1456 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1457 | map->s_partition_type = UDF_TYPE1_MAP15; |
1458 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1459 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1460 | map->s_partition_func = NULL; | |
cb00ea35 | 1461 | } else if (type == 2) { |
4b11111a MS |
1462 | struct udfPartitionMap2 *upm2 = |
1463 | (struct udfPartitionMap2 *)gpm; | |
1464 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1465 | strlen(UDF_ID_VIRTUAL))) { | |
1466 | u16 suf = | |
1467 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1468 | identSuffix)[0]); | |
c82a1275 | 1469 | if (suf < 0x0200) { |
4b11111a MS |
1470 | map->s_partition_type = |
1471 | UDF_VIRTUAL_MAP15; | |
1472 | map->s_partition_func = | |
1473 | udf_get_pblock_virt15; | |
c82a1275 | 1474 | } else { |
4b11111a MS |
1475 | map->s_partition_type = |
1476 | UDF_VIRTUAL_MAP20; | |
1477 | map->s_partition_func = | |
1478 | udf_get_pblock_virt20; | |
1da177e4 | 1479 | } |
4b11111a MS |
1480 | } else if (!strncmp(upm2->partIdent.ident, |
1481 | UDF_ID_SPARABLE, | |
1482 | strlen(UDF_ID_SPARABLE))) { | |
d759bfa4 JK |
1483 | ret = udf_load_sparable_map(sb, map, |
1484 | (struct sparablePartitionMap *)gpm); | |
1485 | if (ret < 0) | |
1df2ae31 | 1486 | goto out_bh; |
bfb257a5 JK |
1487 | } else if (!strncmp(upm2->partIdent.ident, |
1488 | UDF_ID_METADATA, | |
1489 | strlen(UDF_ID_METADATA))) { | |
1490 | struct udf_meta_data *mdata = | |
1491 | &map->s_type_specific.s_metadata; | |
1492 | struct metadataPartitionMap *mdm = | |
1493 | (struct metadataPartitionMap *) | |
1494 | &(lvd->partitionMaps[offset]); | |
a983f368 JP |
1495 | udf_debug("Parsing Logical vol part %d type %d id=%s\n", |
1496 | i, type, UDF_ID_METADATA); | |
bfb257a5 JK |
1497 | |
1498 | map->s_partition_type = UDF_METADATA_MAP25; | |
1499 | map->s_partition_func = udf_get_pblock_meta25; | |
1500 | ||
1501 | mdata->s_meta_file_loc = | |
1502 | le32_to_cpu(mdm->metadataFileLoc); | |
1503 | mdata->s_mirror_file_loc = | |
1504 | le32_to_cpu(mdm->metadataMirrorFileLoc); | |
1505 | mdata->s_bitmap_file_loc = | |
1506 | le32_to_cpu(mdm->metadataBitmapFileLoc); | |
1507 | mdata->s_alloc_unit_size = | |
1508 | le32_to_cpu(mdm->allocUnitSize); | |
1509 | mdata->s_align_unit_size = | |
1510 | le16_to_cpu(mdm->alignUnitSize); | |
ed47a7d0 JK |
1511 | if (mdm->flags & 0x01) |
1512 | mdata->s_flags |= MF_DUPLICATE_MD; | |
bfb257a5 JK |
1513 | |
1514 | udf_debug("Metadata Ident suffix=0x%x\n", | |
a983f368 JP |
1515 | le16_to_cpu(*(__le16 *) |
1516 | mdm->partIdent.identSuffix)); | |
bfb257a5 | 1517 | udf_debug("Metadata part num=%d\n", |
a983f368 | 1518 | le16_to_cpu(mdm->partitionNum)); |
bfb257a5 | 1519 | udf_debug("Metadata part alloc unit size=%d\n", |
a983f368 | 1520 | le32_to_cpu(mdm->allocUnitSize)); |
bfb257a5 | 1521 | udf_debug("Metadata file loc=%d\n", |
a983f368 | 1522 | le32_to_cpu(mdm->metadataFileLoc)); |
bfb257a5 | 1523 | udf_debug("Mirror file loc=%d\n", |
a983f368 | 1524 | le32_to_cpu(mdm->metadataMirrorFileLoc)); |
bfb257a5 | 1525 | udf_debug("Bitmap file loc=%d\n", |
a983f368 | 1526 | le32_to_cpu(mdm->metadataBitmapFileLoc)); |
ed47a7d0 JK |
1527 | udf_debug("Flags: %d %d\n", |
1528 | mdata->s_flags, mdm->flags); | |
cb00ea35 | 1529 | } else { |
3a71fc5d MS |
1530 | udf_debug("Unknown ident: %s\n", |
1531 | upm2->partIdent.ident); | |
1da177e4 LT |
1532 | continue; |
1533 | } | |
6c79e987 MS |
1534 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1535 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 LT |
1536 | } |
1537 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
a983f368 | 1538 | i, map->s_partition_num, type, map->s_volumeseqnum); |
1da177e4 LT |
1539 | } |
1540 | ||
cb00ea35 | 1541 | if (fileset) { |
5ca4e4be | 1542 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1543 | |
1544 | *fileset = lelb_to_cpu(la->extLocation); | |
a983f368 JP |
1545 | udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n", |
1546 | fileset->logicalBlockNum, | |
28de7948 | 1547 | fileset->partitionReferenceNum); |
1da177e4 LT |
1548 | } |
1549 | if (lvd->integritySeqExt.extLength) | |
1550 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
d759bfa4 | 1551 | ret = 0; |
c0eb31ed JK |
1552 | out_bh: |
1553 | brelse(bh); | |
1554 | return ret; | |
1da177e4 LT |
1555 | } |
1556 | ||
1557 | /* | |
1558 | * udf_load_logicalvolint | |
1559 | * | |
1560 | */ | |
5ca4e4be | 1561 | static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) |
1da177e4 LT |
1562 | { |
1563 | struct buffer_head *bh = NULL; | |
1564 | uint16_t ident; | |
6c79e987 MS |
1565 | struct udf_sb_info *sbi = UDF_SB(sb); |
1566 | struct logicalVolIntegrityDesc *lvid; | |
1da177e4 LT |
1567 | |
1568 | while (loc.extLength > 0 && | |
cb00ea35 CG |
1569 | (bh = udf_read_tagged(sb, loc.extLocation, |
1570 | loc.extLocation, &ident)) && | |
1571 | ident == TAG_IDENT_LVID) { | |
6c79e987 MS |
1572 | sbi->s_lvid_bh = bh; |
1573 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
cb00ea35 | 1574 | |
6c79e987 | 1575 | if (lvid->nextIntegrityExt.extLength) |
3a71fc5d | 1576 | udf_load_logicalvolint(sb, |
6c79e987 | 1577 | leea_to_cpu(lvid->nextIntegrityExt)); |
cb00ea35 | 1578 | |
6c79e987 | 1579 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1580 | brelse(bh); |
1da177e4 | 1581 | loc.extLength -= sb->s_blocksize; |
cb00ea35 | 1582 | loc.extLocation++; |
1da177e4 | 1583 | } |
6c79e987 | 1584 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1585 | brelse(bh); |
1da177e4 LT |
1586 | } |
1587 | ||
1588 | /* | |
d759bfa4 JK |
1589 | * Process a main/reserve volume descriptor sequence. |
1590 | * @block First block of first extent of the sequence. | |
1591 | * @lastblock Lastblock of first extent of the sequence. | |
1592 | * @fileset There we store extent containing root fileset | |
1da177e4 | 1593 | * |
d759bfa4 JK |
1594 | * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor |
1595 | * sequence | |
1da177e4 | 1596 | */ |
d759bfa4 JK |
1597 | static noinline int udf_process_sequence( |
1598 | struct super_block *sb, | |
1599 | sector_t block, sector_t lastblock, | |
1600 | struct kernel_lb_addr *fileset) | |
1da177e4 LT |
1601 | { |
1602 | struct buffer_head *bh = NULL; | |
1603 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
4b11111a | 1604 | struct udf_vds_record *curr; |
1da177e4 LT |
1605 | struct generic_desc *gd; |
1606 | struct volDescPtr *vdp; | |
2b8f9421 | 1607 | bool done = false; |
1da177e4 LT |
1608 | uint32_t vdsn; |
1609 | uint16_t ident; | |
1610 | long next_s = 0, next_e = 0; | |
d759bfa4 | 1611 | int ret; |
1da177e4 LT |
1612 | |
1613 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1614 | ||
c0eb31ed JK |
1615 | /* |
1616 | * Read the main descriptor sequence and find which descriptors | |
1617 | * are in it. | |
1618 | */ | |
cb00ea35 | 1619 | for (; (!done && block <= lastblock); block++) { |
1da177e4 LT |
1620 | |
1621 | bh = udf_read_tagged(sb, block, block, &ident); | |
c0eb31ed | 1622 | if (!bh) { |
78ace70c JP |
1623 | udf_err(sb, |
1624 | "Block %llu of volume descriptor sequence is corrupted or we could not read it\n", | |
1625 | (unsigned long long)block); | |
d759bfa4 | 1626 | return -EAGAIN; |
c0eb31ed | 1627 | } |
1da177e4 LT |
1628 | |
1629 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1630 | gd = (struct generic_desc *)bh->b_data; | |
1631 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1632 | switch (ident) { |
28de7948 | 1633 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
4b11111a MS |
1634 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
1635 | if (vdsn >= curr->volDescSeqNum) { | |
1636 | curr->volDescSeqNum = vdsn; | |
1637 | curr->block = block; | |
cb00ea35 CG |
1638 | } |
1639 | break; | |
28de7948 | 1640 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
4b11111a MS |
1641 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
1642 | if (vdsn >= curr->volDescSeqNum) { | |
1643 | curr->volDescSeqNum = vdsn; | |
1644 | curr->block = block; | |
cb00ea35 CG |
1645 | |
1646 | vdp = (struct volDescPtr *)bh->b_data; | |
4b11111a MS |
1647 | next_s = le32_to_cpu( |
1648 | vdp->nextVolDescSeqExt.extLocation); | |
1649 | next_e = le32_to_cpu( | |
1650 | vdp->nextVolDescSeqExt.extLength); | |
cb00ea35 CG |
1651 | next_e = next_e >> sb->s_blocksize_bits; |
1652 | next_e += next_s; | |
1653 | } | |
1654 | break; | |
28de7948 | 1655 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
4b11111a MS |
1656 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
1657 | if (vdsn >= curr->volDescSeqNum) { | |
1658 | curr->volDescSeqNum = vdsn; | |
1659 | curr->block = block; | |
cb00ea35 CG |
1660 | } |
1661 | break; | |
28de7948 | 1662 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
4b11111a MS |
1663 | curr = &vds[VDS_POS_PARTITION_DESC]; |
1664 | if (!curr->block) | |
1665 | curr->block = block; | |
cb00ea35 | 1666 | break; |
28de7948 | 1667 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
4b11111a MS |
1668 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
1669 | if (vdsn >= curr->volDescSeqNum) { | |
1670 | curr->volDescSeqNum = vdsn; | |
1671 | curr->block = block; | |
cb00ea35 CG |
1672 | } |
1673 | break; | |
28de7948 | 1674 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
4b11111a MS |
1675 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
1676 | if (vdsn >= curr->volDescSeqNum) { | |
1677 | curr->volDescSeqNum = vdsn; | |
1678 | curr->block = block; | |
cb00ea35 CG |
1679 | } |
1680 | break; | |
28de7948 | 1681 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
cb00ea35 CG |
1682 | vds[VDS_POS_TERMINATING_DESC].block = block; |
1683 | if (next_e) { | |
1684 | block = next_s; | |
1685 | lastblock = next_e; | |
1686 | next_s = next_e = 0; | |
4b11111a | 1687 | } else |
2b8f9421 | 1688 | done = true; |
cb00ea35 | 1689 | break; |
1da177e4 | 1690 | } |
3bf25cb4 | 1691 | brelse(bh); |
1da177e4 | 1692 | } |
c0eb31ed JK |
1693 | /* |
1694 | * Now read interesting descriptors again and process them | |
1695 | * in a suitable order | |
1696 | */ | |
1697 | if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { | |
78ace70c | 1698 | udf_err(sb, "Primary Volume Descriptor not found!\n"); |
d759bfa4 JK |
1699 | return -EAGAIN; |
1700 | } | |
1701 | ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block); | |
1702 | if (ret < 0) | |
1703 | return ret; | |
1704 | ||
1705 | if (vds[VDS_POS_LOGICAL_VOL_DESC].block) { | |
1706 | ret = udf_load_logicalvol(sb, | |
1707 | vds[VDS_POS_LOGICAL_VOL_DESC].block, | |
1708 | fileset); | |
1709 | if (ret < 0) | |
1710 | return ret; | |
c0eb31ed | 1711 | } |
165923fa | 1712 | |
c0eb31ed JK |
1713 | if (vds[VDS_POS_PARTITION_DESC].block) { |
1714 | /* | |
1715 | * We rescan the whole descriptor sequence to find | |
1716 | * partition descriptor blocks and process them. | |
1717 | */ | |
1718 | for (block = vds[VDS_POS_PARTITION_DESC].block; | |
1719 | block < vds[VDS_POS_TERMINATING_DESC].block; | |
d759bfa4 JK |
1720 | block++) { |
1721 | ret = udf_load_partdesc(sb, block); | |
1722 | if (ret < 0) | |
1723 | return ret; | |
1724 | } | |
1da177e4 LT |
1725 | } |
1726 | ||
1727 | return 0; | |
1728 | } | |
1729 | ||
d759bfa4 JK |
1730 | /* |
1731 | * Load Volume Descriptor Sequence described by anchor in bh | |
1732 | * | |
1733 | * Returns <0 on error, 0 on success | |
1734 | */ | |
40346005 JK |
1735 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, |
1736 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1737 | { |
40346005 | 1738 | struct anchorVolDescPtr *anchor; |
d759bfa4 JK |
1739 | sector_t main_s, main_e, reserve_s, reserve_e; |
1740 | int ret; | |
1da177e4 | 1741 | |
40346005 JK |
1742 | anchor = (struct anchorVolDescPtr *)bh->b_data; |
1743 | ||
1744 | /* Locate the main sequence */ | |
1745 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1746 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1747 | main_e = main_e >> sb->s_blocksize_bits; | |
1748 | main_e += main_s; | |
1749 | ||
1750 | /* Locate the reserve sequence */ | |
1751 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); | |
1752 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); | |
1753 | reserve_e = reserve_e >> sb->s_blocksize_bits; | |
1754 | reserve_e += reserve_s; | |
1755 | ||
1756 | /* Process the main & reserve sequences */ | |
1757 | /* responsible for finding the PartitionDesc(s) */ | |
d759bfa4 JK |
1758 | ret = udf_process_sequence(sb, main_s, main_e, fileset); |
1759 | if (ret != -EAGAIN) | |
1760 | return ret; | |
bff943af | 1761 | udf_sb_free_partitions(sb); |
d759bfa4 JK |
1762 | ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset); |
1763 | if (ret < 0) { | |
1764 | udf_sb_free_partitions(sb); | |
1765 | /* No sequence was OK, return -EIO */ | |
1766 | if (ret == -EAGAIN) | |
1767 | ret = -EIO; | |
1768 | } | |
1769 | return ret; | |
1da177e4 LT |
1770 | } |
1771 | ||
40346005 JK |
1772 | /* |
1773 | * Check whether there is an anchor block in the given block and | |
1774 | * load Volume Descriptor Sequence if so. | |
d759bfa4 JK |
1775 | * |
1776 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor | |
1777 | * block | |
40346005 JK |
1778 | */ |
1779 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, | |
1780 | struct kernel_lb_addr *fileset) | |
1197e4df | 1781 | { |
40346005 JK |
1782 | struct buffer_head *bh; |
1783 | uint16_t ident; | |
1784 | int ret; | |
1197e4df | 1785 | |
40346005 JK |
1786 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
1787 | udf_fixed_to_variable(block) >= | |
1788 | sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) | |
d759bfa4 | 1789 | return -EAGAIN; |
40346005 JK |
1790 | |
1791 | bh = udf_read_tagged(sb, block, block, &ident); | |
1792 | if (!bh) | |
d759bfa4 | 1793 | return -EAGAIN; |
40346005 JK |
1794 | if (ident != TAG_IDENT_AVDP) { |
1795 | brelse(bh); | |
d759bfa4 | 1796 | return -EAGAIN; |
1197e4df | 1797 | } |
40346005 JK |
1798 | ret = udf_load_sequence(sb, bh, fileset); |
1799 | brelse(bh); | |
1800 | return ret; | |
1197e4df CL |
1801 | } |
1802 | ||
d759bfa4 JK |
1803 | /* |
1804 | * Search for an anchor volume descriptor pointer. | |
1805 | * | |
1806 | * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set | |
1807 | * of anchors. | |
1808 | */ | |
1809 | static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock, | |
1810 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1811 | { |
40346005 | 1812 | sector_t last[6]; |
38b74a53 | 1813 | int i; |
40346005 JK |
1814 | struct udf_sb_info *sbi = UDF_SB(sb); |
1815 | int last_count = 0; | |
d759bfa4 | 1816 | int ret; |
1da177e4 | 1817 | |
40346005 JK |
1818 | /* First try user provided anchor */ |
1819 | if (sbi->s_anchor) { | |
d759bfa4 JK |
1820 | ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset); |
1821 | if (ret != -EAGAIN) | |
1822 | return ret; | |
40346005 JK |
1823 | } |
1824 | /* | |
1825 | * according to spec, anchor is in either: | |
1826 | * block 256 | |
1827 | * lastblock-256 | |
1828 | * lastblock | |
1829 | * however, if the disc isn't closed, it could be 512. | |
1830 | */ | |
d759bfa4 JK |
1831 | ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset); |
1832 | if (ret != -EAGAIN) | |
1833 | return ret; | |
40346005 JK |
1834 | /* |
1835 | * The trouble is which block is the last one. Drives often misreport | |
1836 | * this so we try various possibilities. | |
1837 | */ | |
d759bfa4 JK |
1838 | last[last_count++] = *lastblock; |
1839 | if (*lastblock >= 1) | |
1840 | last[last_count++] = *lastblock - 1; | |
1841 | last[last_count++] = *lastblock + 1; | |
1842 | if (*lastblock >= 2) | |
1843 | last[last_count++] = *lastblock - 2; | |
1844 | if (*lastblock >= 150) | |
1845 | last[last_count++] = *lastblock - 150; | |
1846 | if (*lastblock >= 152) | |
1847 | last[last_count++] = *lastblock - 152; | |
1da177e4 | 1848 | |
40346005 JK |
1849 | for (i = 0; i < last_count; i++) { |
1850 | if (last[i] >= sb->s_bdev->bd_inode->i_size >> | |
1851 | sb->s_blocksize_bits) | |
28f7c4d4 | 1852 | continue; |
d759bfa4 JK |
1853 | ret = udf_check_anchor_block(sb, last[i], fileset); |
1854 | if (ret != -EAGAIN) { | |
1855 | if (!ret) | |
1856 | *lastblock = last[i]; | |
1857 | return ret; | |
1858 | } | |
40346005 | 1859 | if (last[i] < 256) |
28f7c4d4 | 1860 | continue; |
d759bfa4 JK |
1861 | ret = udf_check_anchor_block(sb, last[i] - 256, fileset); |
1862 | if (ret != -EAGAIN) { | |
1863 | if (!ret) | |
1864 | *lastblock = last[i]; | |
1865 | return ret; | |
1866 | } | |
40346005 | 1867 | } |
28f7c4d4 | 1868 | |
40346005 | 1869 | /* Finally try block 512 in case media is open */ |
d759bfa4 | 1870 | return udf_check_anchor_block(sb, sbi->s_session + 512, fileset); |
40346005 | 1871 | } |
28f7c4d4 | 1872 | |
40346005 JK |
1873 | /* |
1874 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from | |
1875 | * area specified by it. The function expects sbi->s_lastblock to be the last | |
1876 | * block on the media. | |
1877 | * | |
d759bfa4 JK |
1878 | * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor |
1879 | * was not found. | |
40346005 JK |
1880 | */ |
1881 | static int udf_find_anchor(struct super_block *sb, | |
1882 | struct kernel_lb_addr *fileset) | |
1883 | { | |
40346005 | 1884 | struct udf_sb_info *sbi = UDF_SB(sb); |
d759bfa4 JK |
1885 | sector_t lastblock = sbi->s_last_block; |
1886 | int ret; | |
28f7c4d4 | 1887 | |
d759bfa4 JK |
1888 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1889 | if (ret != -EAGAIN) | |
40346005 | 1890 | goto out; |
1da177e4 | 1891 | |
40346005 JK |
1892 | /* No anchor found? Try VARCONV conversion of block numbers */ |
1893 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
d759bfa4 | 1894 | lastblock = udf_variable_to_fixed(sbi->s_last_block); |
40346005 | 1895 | /* Firstly, we try to not convert number of the last block */ |
d759bfa4 JK |
1896 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1897 | if (ret != -EAGAIN) | |
40346005 | 1898 | goto out; |
1da177e4 | 1899 | |
d759bfa4 | 1900 | lastblock = sbi->s_last_block; |
40346005 | 1901 | /* Secondly, we try with converted number of the last block */ |
d759bfa4 JK |
1902 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1903 | if (ret < 0) { | |
40346005 JK |
1904 | /* VARCONV didn't help. Clear it. */ |
1905 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); | |
1da177e4 | 1906 | } |
40346005 | 1907 | out: |
d759bfa4 JK |
1908 | if (ret == 0) |
1909 | sbi->s_last_block = lastblock; | |
1910 | return ret; | |
40346005 | 1911 | } |
1da177e4 | 1912 | |
40346005 JK |
1913 | /* |
1914 | * Check Volume Structure Descriptor, find Anchor block and load Volume | |
d759bfa4 JK |
1915 | * Descriptor Sequence. |
1916 | * | |
1917 | * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor | |
1918 | * block was not found. | |
40346005 JK |
1919 | */ |
1920 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, | |
1921 | int silent, struct kernel_lb_addr *fileset) | |
1922 | { | |
1923 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1924 | loff_t nsr_off; | |
d759bfa4 | 1925 | int ret; |
40346005 JK |
1926 | |
1927 | if (!sb_set_blocksize(sb, uopt->blocksize)) { | |
1928 | if (!silent) | |
78ace70c | 1929 | udf_warn(sb, "Bad block size\n"); |
d759bfa4 | 1930 | return -EINVAL; |
40346005 JK |
1931 | } |
1932 | sbi->s_last_block = uopt->lastblock; | |
1933 | if (!uopt->novrs) { | |
1934 | /* Check that it is NSR02 compliant */ | |
1935 | nsr_off = udf_check_vsd(sb); | |
1936 | if (!nsr_off) { | |
1937 | if (!silent) | |
78ace70c | 1938 | udf_warn(sb, "No VRS found\n"); |
40346005 JK |
1939 | return 0; |
1940 | } | |
1941 | if (nsr_off == -1) | |
44499602 PF |
1942 | udf_debug("Failed to read sector at offset %d. " |
1943 | "Assuming open disc. Skipping validity " | |
1944 | "check\n", VSD_FIRST_SECTOR_OFFSET); | |
40346005 JK |
1945 | if (!sbi->s_last_block) |
1946 | sbi->s_last_block = udf_get_last_block(sb); | |
1947 | } else { | |
1948 | udf_debug("Validity check skipped because of novrs option\n"); | |
28f7c4d4 | 1949 | } |
1da177e4 | 1950 | |
40346005 JK |
1951 | /* Look for anchor block and load Volume Descriptor Sequence */ |
1952 | sbi->s_anchor = uopt->anchor; | |
d759bfa4 JK |
1953 | ret = udf_find_anchor(sb, fileset); |
1954 | if (ret < 0) { | |
1955 | if (!silent && ret == -EAGAIN) | |
78ace70c | 1956 | udf_warn(sb, "No anchor found\n"); |
d759bfa4 | 1957 | return ret; |
40346005 | 1958 | } |
d759bfa4 | 1959 | return 0; |
1da177e4 LT |
1960 | } |
1961 | ||
1962 | static void udf_open_lvid(struct super_block *sb) | |
1963 | { | |
6c79e987 MS |
1964 | struct udf_sb_info *sbi = UDF_SB(sb); |
1965 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
1966 | struct logicalVolIntegrityDesc *lvid; |
1967 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
146bca72 | 1968 | |
165923fa MS |
1969 | if (!bh) |
1970 | return; | |
165923fa | 1971 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
69d75671 JK |
1972 | lvidiu = udf_sb_lvidiu(sb); |
1973 | if (!lvidiu) | |
1974 | return; | |
165923fa | 1975 | |
69d75671 | 1976 | mutex_lock(&sbi->s_alloc_mutex); |
165923fa MS |
1977 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
1978 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1979 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, | |
1980 | CURRENT_TIME); | |
146bca72 | 1981 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); |
165923fa MS |
1982 | |
1983 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1984 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 1985 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
1986 | |
1987 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1988 | mark_buffer_dirty(bh); | |
146bca72 | 1989 | sbi->s_lvid_dirty = 0; |
949f4a7c | 1990 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
1991 | /* Make opening of filesystem visible on the media immediately */ |
1992 | sync_dirty_buffer(bh); | |
1da177e4 LT |
1993 | } |
1994 | ||
1995 | static void udf_close_lvid(struct super_block *sb) | |
1996 | { | |
6c79e987 MS |
1997 | struct udf_sb_info *sbi = UDF_SB(sb); |
1998 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1999 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 2000 | struct logicalVolIntegrityDescImpUse *lvidiu; |
28de7948 | 2001 | |
6c79e987 MS |
2002 | if (!bh) |
2003 | return; | |
69d75671 JK |
2004 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
2005 | lvidiu = udf_sb_lvidiu(sb); | |
2006 | if (!lvidiu) | |
2007 | return; | |
6c79e987 | 2008 | |
949f4a7c | 2009 | mutex_lock(&sbi->s_alloc_mutex); |
165923fa MS |
2010 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
2011 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
2012 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); | |
2013 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) | |
2014 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
2015 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
2016 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
2017 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
2018 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
2019 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
2020 | ||
2021 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 2022 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 2023 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
2024 | |
2025 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
853a0c25 JK |
2026 | /* |
2027 | * We set buffer uptodate unconditionally here to avoid spurious | |
2028 | * warnings from mark_buffer_dirty() when previous EIO has marked | |
2029 | * the buffer as !uptodate | |
2030 | */ | |
2031 | set_buffer_uptodate(bh); | |
165923fa | 2032 | mark_buffer_dirty(bh); |
146bca72 | 2033 | sbi->s_lvid_dirty = 0; |
949f4a7c | 2034 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
2035 | /* Make closing of filesystem visible on the media immediately */ |
2036 | sync_dirty_buffer(bh); | |
1da177e4 LT |
2037 | } |
2038 | ||
d664b6af JK |
2039 | u64 lvid_get_unique_id(struct super_block *sb) |
2040 | { | |
2041 | struct buffer_head *bh; | |
2042 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2043 | struct logicalVolIntegrityDesc *lvid; | |
2044 | struct logicalVolHeaderDesc *lvhd; | |
2045 | u64 uniqueID; | |
2046 | u64 ret; | |
2047 | ||
2048 | bh = sbi->s_lvid_bh; | |
2049 | if (!bh) | |
2050 | return 0; | |
2051 | ||
2052 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
2053 | lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; | |
2054 | ||
2055 | mutex_lock(&sbi->s_alloc_mutex); | |
2056 | ret = uniqueID = le64_to_cpu(lvhd->uniqueID); | |
2057 | if (!(++uniqueID & 0xFFFFFFFF)) | |
2058 | uniqueID += 16; | |
2059 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
2060 | mutex_unlock(&sbi->s_alloc_mutex); | |
2061 | mark_buffer_dirty(bh); | |
2062 | ||
2063 | return ret; | |
1da177e4 LT |
2064 | } |
2065 | ||
1da177e4 LT |
2066 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
2067 | { | |
d759bfa4 | 2068 | int ret = -EINVAL; |
cb00ea35 | 2069 | struct inode *inode = NULL; |
1da177e4 | 2070 | struct udf_options uopt; |
5ca4e4be | 2071 | struct kernel_lb_addr rootdir, fileset; |
1da177e4 | 2072 | struct udf_sb_info *sbi; |
9181f8bf | 2073 | bool lvid_open = false; |
1da177e4 LT |
2074 | |
2075 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
c2ba138a EB |
2076 | uopt.uid = INVALID_UID; |
2077 | uopt.gid = INVALID_GID; | |
1da177e4 | 2078 | uopt.umask = 0; |
87bc730c MS |
2079 | uopt.fmode = UDF_INVALID_MODE; |
2080 | uopt.dmode = UDF_INVALID_MODE; | |
1da177e4 | 2081 | |
6c79e987 | 2082 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
9db9f9e3 | 2083 | if (!sbi) |
1da177e4 | 2084 | return -ENOMEM; |
28de7948 | 2085 | |
1da177e4 | 2086 | sb->s_fs_info = sbi; |
1da177e4 | 2087 | |
1e7933de | 2088 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 2089 | |
6da80894 | 2090 | if (!udf_parse_options((char *)options, &uopt, false)) |
fdf2657b | 2091 | goto parse_options_failure; |
1da177e4 LT |
2092 | |
2093 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 2094 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
8076c363 | 2095 | udf_err(sb, "utf8 cannot be combined with iocharset\n"); |
fdf2657b | 2096 | goto parse_options_failure; |
1da177e4 LT |
2097 | } |
2098 | #ifdef CONFIG_UDF_NLS | |
cb00ea35 | 2099 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
2100 | uopt.nls_map = load_nls_default(); |
2101 | if (!uopt.nls_map) | |
2102 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
2103 | else | |
2104 | udf_debug("Using default NLS map\n"); | |
2105 | } | |
2106 | #endif | |
2107 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
2108 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
2109 | ||
2110 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
2111 | fileset.partitionReferenceNum = 0xFFFF; | |
2112 | ||
6c79e987 MS |
2113 | sbi->s_flags = uopt.flags; |
2114 | sbi->s_uid = uopt.uid; | |
2115 | sbi->s_gid = uopt.gid; | |
2116 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
2117 | sbi->s_fmode = uopt.fmode; |
2118 | sbi->s_dmode = uopt.dmode; | |
6c79e987 | 2119 | sbi->s_nls_map = uopt.nls_map; |
c03cad24 | 2120 | rwlock_init(&sbi->s_cred_lock); |
1da177e4 | 2121 | |
cb00ea35 | 2122 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 2123 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 2124 | else |
6c79e987 | 2125 | sbi->s_session = uopt.session; |
1da177e4 | 2126 | |
6c79e987 | 2127 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 2128 | |
40346005 JK |
2129 | /* Fill in the rest of the superblock */ |
2130 | sb->s_op = &udf_sb_ops; | |
2131 | sb->s_export_op = &udf_export_ops; | |
123e9caf | 2132 | |
40346005 JK |
2133 | sb->s_magic = UDF_SUPER_MAGIC; |
2134 | sb->s_time_gran = 1000; | |
2135 | ||
1197e4df | 2136 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { |
40346005 | 2137 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 2138 | } else { |
e1defc4f | 2139 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); |
40346005 | 2140 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
d759bfa4 | 2141 | if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { |
1197e4df | 2142 | if (!silent) |
78ace70c JP |
2143 | pr_notice("Rescanning with blocksize %d\n", |
2144 | UDF_DEFAULT_BLOCKSIZE); | |
dc141a40 AS |
2145 | brelse(sbi->s_lvid_bh); |
2146 | sbi->s_lvid_bh = NULL; | |
1197e4df | 2147 | uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; |
40346005 | 2148 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 2149 | } |
1da177e4 | 2150 | } |
d759bfa4 JK |
2151 | if (ret < 0) { |
2152 | if (ret == -EAGAIN) { | |
2153 | udf_warn(sb, "No partition found (1)\n"); | |
2154 | ret = -EINVAL; | |
2155 | } | |
1da177e4 LT |
2156 | goto error_out; |
2157 | } | |
2158 | ||
6c79e987 | 2159 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
1da177e4 | 2160 | |
6c79e987 | 2161 | if (sbi->s_lvid_bh) { |
4b11111a | 2162 | struct logicalVolIntegrityDescImpUse *lvidiu = |
69d75671 JK |
2163 | udf_sb_lvidiu(sb); |
2164 | uint16_t minUDFReadRev; | |
2165 | uint16_t minUDFWriteRev; | |
1da177e4 | 2166 | |
69d75671 JK |
2167 | if (!lvidiu) { |
2168 | ret = -EINVAL; | |
2169 | goto error_out; | |
2170 | } | |
2171 | minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); | |
2172 | minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
cb00ea35 | 2173 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
78ace70c | 2174 | udf_err(sb, "minUDFReadRev=%x (max is %x)\n", |
69d75671 | 2175 | minUDFReadRev, |
78ace70c | 2176 | UDF_MAX_READ_VERSION); |
d759bfa4 | 2177 | ret = -EINVAL; |
1da177e4 | 2178 | goto error_out; |
e729eac6 JK |
2179 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION && |
2180 | !(sb->s_flags & MS_RDONLY)) { | |
2181 | ret = -EACCES; | |
2182 | goto error_out; | |
2183 | } | |
1da177e4 | 2184 | |
6c79e987 | 2185 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
2186 | |
2187 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
2188 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
2189 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
2190 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
2191 | } | |
2192 | ||
6c79e987 | 2193 | if (!sbi->s_partitions) { |
78ace70c | 2194 | udf_warn(sb, "No partition found (2)\n"); |
d759bfa4 | 2195 | ret = -EINVAL; |
1da177e4 LT |
2196 | goto error_out; |
2197 | } | |
2198 | ||
4b11111a | 2199 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
e729eac6 JK |
2200 | UDF_PART_FLAG_READ_ONLY && |
2201 | !(sb->s_flags & MS_RDONLY)) { | |
2202 | ret = -EACCES; | |
2203 | goto error_out; | |
c1a26e7d | 2204 | } |
39b3f6d6 | 2205 | |
cb00ea35 | 2206 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
78ace70c | 2207 | udf_warn(sb, "No fileset found\n"); |
d759bfa4 | 2208 | ret = -EINVAL; |
1da177e4 LT |
2209 | goto error_out; |
2210 | } | |
2211 | ||
cb00ea35 | 2212 | if (!silent) { |
5ca4e4be | 2213 | struct timestamp ts; |
56774805 | 2214 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); |
78ace70c JP |
2215 | udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
2216 | sbi->s_volume_ident, | |
2217 | le16_to_cpu(ts.year), ts.month, ts.day, | |
56774805 | 2218 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); |
1da177e4 | 2219 | } |
9181f8bf | 2220 | if (!(sb->s_flags & MS_RDONLY)) { |
1da177e4 | 2221 | udf_open_lvid(sb); |
9181f8bf JK |
2222 | lvid_open = true; |
2223 | } | |
1da177e4 LT |
2224 | |
2225 | /* Assign the root inode */ | |
2226 | /* assign inodes by physical block number */ | |
2227 | /* perhaps it's not extensible enough, but for now ... */ | |
97e961fd | 2228 | inode = udf_iget(sb, &rootdir); |
6d3d5e86 | 2229 | if (IS_ERR(inode)) { |
78ace70c | 2230 | udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n", |
cb00ea35 | 2231 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
6d3d5e86 | 2232 | ret = PTR_ERR(inode); |
1da177e4 LT |
2233 | goto error_out; |
2234 | } | |
2235 | ||
2236 | /* Allocate a dentry for the root inode */ | |
48fde701 | 2237 | sb->s_root = d_make_root(inode); |
cb00ea35 | 2238 | if (!sb->s_root) { |
78ace70c | 2239 | udf_err(sb, "Couldn't allocate root dentry\n"); |
d759bfa4 | 2240 | ret = -ENOMEM; |
1da177e4 LT |
2241 | goto error_out; |
2242 | } | |
31170b6a | 2243 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
8de52778 | 2244 | sb->s_max_links = UDF_MAX_LINKS; |
1da177e4 LT |
2245 | return 0; |
2246 | ||
28de7948 | 2247 | error_out: |
0d454e4a | 2248 | iput(sbi->s_vat_inode); |
fdf2657b | 2249 | parse_options_failure: |
1da177e4 LT |
2250 | #ifdef CONFIG_UDF_NLS |
2251 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2252 | unload_nls(sbi->s_nls_map); |
1da177e4 | 2253 | #endif |
9181f8bf | 2254 | if (lvid_open) |
1da177e4 | 2255 | udf_close_lvid(sb); |
6c79e987 | 2256 | brelse(sbi->s_lvid_bh); |
bff943af | 2257 | udf_sb_free_partitions(sb); |
1da177e4 LT |
2258 | kfree(sbi); |
2259 | sb->s_fs_info = NULL; | |
28de7948 | 2260 | |
d759bfa4 | 2261 | return ret; |
1da177e4 LT |
2262 | } |
2263 | ||
8076c363 JP |
2264 | void _udf_err(struct super_block *sb, const char *function, |
2265 | const char *fmt, ...) | |
1da177e4 | 2266 | { |
c2bff36c | 2267 | struct va_format vaf; |
1da177e4 LT |
2268 | va_list args; |
2269 | ||
1da177e4 | 2270 | va_start(args, fmt); |
c2bff36c JP |
2271 | |
2272 | vaf.fmt = fmt; | |
2273 | vaf.va = &args; | |
2274 | ||
2275 | pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2276 | ||
1da177e4 | 2277 | va_end(args); |
1da177e4 LT |
2278 | } |
2279 | ||
a40ecd7b JP |
2280 | void _udf_warn(struct super_block *sb, const char *function, |
2281 | const char *fmt, ...) | |
1da177e4 | 2282 | { |
c2bff36c | 2283 | struct va_format vaf; |
1da177e4 LT |
2284 | va_list args; |
2285 | ||
cb00ea35 | 2286 | va_start(args, fmt); |
c2bff36c JP |
2287 | |
2288 | vaf.fmt = fmt; | |
2289 | vaf.va = &args; | |
2290 | ||
2291 | pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2292 | ||
1da177e4 | 2293 | va_end(args); |
1da177e4 LT |
2294 | } |
2295 | ||
cb00ea35 | 2296 | static void udf_put_super(struct super_block *sb) |
1da177e4 | 2297 | { |
6c79e987 | 2298 | struct udf_sb_info *sbi; |
1da177e4 | 2299 | |
6c79e987 | 2300 | sbi = UDF_SB(sb); |
6cfd0148 | 2301 | |
0d454e4a | 2302 | iput(sbi->s_vat_inode); |
1da177e4 LT |
2303 | #ifdef CONFIG_UDF_NLS |
2304 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2305 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2306 | #endif |
2307 | if (!(sb->s_flags & MS_RDONLY)) | |
2308 | udf_close_lvid(sb); | |
6c79e987 | 2309 | brelse(sbi->s_lvid_bh); |
bff943af | 2310 | udf_sb_free_partitions(sb); |
bbe48dd8 | 2311 | mutex_destroy(&sbi->s_alloc_mutex); |
1da177e4 LT |
2312 | kfree(sb->s_fs_info); |
2313 | sb->s_fs_info = NULL; | |
2314 | } | |
2315 | ||
146bca72 JK |
2316 | static int udf_sync_fs(struct super_block *sb, int wait) |
2317 | { | |
2318 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2319 | ||
2320 | mutex_lock(&sbi->s_alloc_mutex); | |
2321 | if (sbi->s_lvid_dirty) { | |
2322 | /* | |
2323 | * Blockdevice will be synced later so we don't have to submit | |
2324 | * the buffer for IO | |
2325 | */ | |
2326 | mark_buffer_dirty(sbi->s_lvid_bh); | |
146bca72 JK |
2327 | sbi->s_lvid_dirty = 0; |
2328 | } | |
2329 | mutex_unlock(&sbi->s_alloc_mutex); | |
2330 | ||
2331 | return 0; | |
2332 | } | |
2333 | ||
cb00ea35 | 2334 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2335 | { |
726c3342 | 2336 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
2337 | struct udf_sb_info *sbi = UDF_SB(sb); |
2338 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
557f5a14 | 2339 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
6c79e987 | 2340 | |
69d75671 | 2341 | lvidiu = udf_sb_lvidiu(sb); |
1da177e4 LT |
2342 | buf->f_type = UDF_SUPER_MAGIC; |
2343 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 2344 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
2345 | buf->f_bfree = udf_count_free(sb); |
2346 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
2347 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
2348 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
2349 | + buf->f_bfree; | |
1da177e4 | 2350 | buf->f_ffree = buf->f_bfree; |
cb00ea35 | 2351 | buf->f_namelen = UDF_NAME_LEN - 2; |
557f5a14 CL |
2352 | buf->f_fsid.val[0] = (u32)id; |
2353 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
2354 | |
2355 | return 0; | |
2356 | } | |
2357 | ||
4b11111a MS |
2358 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
2359 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
2360 | { |
2361 | struct buffer_head *bh = NULL; | |
2362 | unsigned int accum = 0; | |
2363 | int index; | |
2364 | int block = 0, newblock; | |
5ca4e4be | 2365 | struct kernel_lb_addr loc; |
1da177e4 | 2366 | uint32_t bytes; |
1da177e4 LT |
2367 | uint8_t *ptr; |
2368 | uint16_t ident; | |
2369 | struct spaceBitmapDesc *bm; | |
2370 | ||
1da177e4 | 2371 | loc.logicalBlockNum = bitmap->s_extPosition; |
6c79e987 | 2372 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
97e961fd | 2373 | bh = udf_read_ptagged(sb, &loc, 0, &ident); |
1da177e4 | 2374 | |
cb00ea35 | 2375 | if (!bh) { |
78ace70c | 2376 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 | 2377 | goto out; |
cb00ea35 | 2378 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 2379 | brelse(bh); |
78ace70c | 2380 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 LT |
2381 | goto out; |
2382 | } | |
2383 | ||
2384 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2385 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
2386 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
2387 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 2388 | |
cb00ea35 | 2389 | while (bytes > 0) { |
01b954a3 MS |
2390 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
2391 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2392 | cur_bytes * 8); | |
2393 | bytes -= cur_bytes; | |
cb00ea35 | 2394 | if (bytes) { |
3bf25cb4 | 2395 | brelse(bh); |
97e961fd | 2396 | newblock = udf_get_lb_pblock(sb, &loc, ++block); |
1da177e4 | 2397 | bh = udf_tread(sb, newblock); |
cb00ea35 | 2398 | if (!bh) { |
1da177e4 LT |
2399 | udf_debug("read failed\n"); |
2400 | goto out; | |
2401 | } | |
2402 | index = 0; | |
28de7948 | 2403 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2404 | } |
2405 | } | |
3bf25cb4 | 2406 | brelse(bh); |
28de7948 | 2407 | out: |
1da177e4 LT |
2408 | return accum; |
2409 | } | |
2410 | ||
4b11111a MS |
2411 | static unsigned int udf_count_free_table(struct super_block *sb, |
2412 | struct inode *table) | |
1da177e4 LT |
2413 | { |
2414 | unsigned int accum = 0; | |
ff116fc8 | 2415 | uint32_t elen; |
5ca4e4be | 2416 | struct kernel_lb_addr eloc; |
1da177e4 | 2417 | int8_t etype; |
ff116fc8 | 2418 | struct extent_position epos; |
1da177e4 | 2419 | |
d1668fe3 | 2420 | mutex_lock(&UDF_SB(sb)->s_alloc_mutex); |
c0b34438 | 2421 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2422 | epos.offset = sizeof(struct unallocSpaceEntry); |
2423 | epos.bh = NULL; | |
1da177e4 | 2424 | |
3a71fc5d | 2425 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2426 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2427 | |
3bf25cb4 | 2428 | brelse(epos.bh); |
d1668fe3 | 2429 | mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); |
1da177e4 LT |
2430 | |
2431 | return accum; | |
2432 | } | |
cb00ea35 CG |
2433 | |
2434 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2435 | { |
2436 | unsigned int accum = 0; | |
6c79e987 MS |
2437 | struct udf_sb_info *sbi; |
2438 | struct udf_part_map *map; | |
1da177e4 | 2439 | |
6c79e987 MS |
2440 | sbi = UDF_SB(sb); |
2441 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2442 | struct logicalVolIntegrityDesc *lvid = |
2443 | (struct logicalVolIntegrityDesc *) | |
2444 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2445 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2446 | accum = le32_to_cpu( |
2447 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2448 | if (accum == 0xFFFFFFFF) |
2449 | accum = 0; | |
2450 | } | |
2451 | } | |
2452 | ||
2453 | if (accum) | |
2454 | return accum; | |
2455 | ||
6c79e987 MS |
2456 | map = &sbi->s_partmaps[sbi->s_partition]; |
2457 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2458 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2459 | map->s_uspace.s_bitmap); |
1da177e4 | 2460 | } |
6c79e987 | 2461 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
28de7948 | 2462 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2463 | map->s_fspace.s_bitmap); |
1da177e4 LT |
2464 | } |
2465 | if (accum) | |
2466 | return accum; | |
2467 | ||
6c79e987 | 2468 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2469 | accum += udf_count_free_table(sb, |
6c79e987 | 2470 | map->s_uspace.s_table); |
1da177e4 | 2471 | } |
6c79e987 | 2472 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
28de7948 | 2473 | accum += udf_count_free_table(sb, |
6c79e987 | 2474 | map->s_fspace.s_table); |
1da177e4 LT |
2475 | } |
2476 | ||
2477 | return accum; | |
2478 | } |