Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * super.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Super block routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
7 | * DESCRIPTION | |
8 | * OSTA-UDF(tm) = Optical Storage Technology Association | |
9 | * Universal Disk Format. | |
10 | * | |
11 | * This code is based on version 2.00 of the UDF specification, | |
12 | * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346]. | |
13 | * http://www.osta.org/ | |
14 | * http://www.ecma.ch/ | |
15 | * http://www.iso.org/ | |
16 | * | |
1da177e4 LT |
17 | * COPYRIGHT |
18 | * This file is distributed under the terms of the GNU General Public | |
19 | * License (GPL). Copies of the GPL can be obtained from: | |
20 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
21 | * Each contributing author retains all rights to their own work. | |
22 | * | |
23 | * (C) 1998 Dave Boynton | |
24 | * (C) 1998-2004 Ben Fennema | |
25 | * (C) 2000 Stelias Computing Inc | |
26 | * | |
27 | * HISTORY | |
28 | * | |
29 | * 09/24/98 dgb changed to allow compiling outside of kernel, and | |
30 | * added some debugging. | |
31 | * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34 | |
32 | * 10/16/98 attempting some multi-session support | |
33 | * 10/17/98 added freespace count for "df" | |
34 | * 11/11/98 gr added novrs option | |
35 | * 11/26/98 dgb added fileset,anchor mount options | |
3a71fc5d MS |
36 | * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced |
37 | * vol descs. rewrote option handling based on isofs | |
1da177e4 LT |
38 | * 12/20/98 find the free space bitmap (if it exists) |
39 | */ | |
40 | ||
cb00ea35 | 41 | #include "udfdecl.h" |
1da177e4 | 42 | |
1da177e4 LT |
43 | #include <linux/blkdev.h> |
44 | #include <linux/slab.h> | |
45 | #include <linux/kernel.h> | |
46 | #include <linux/module.h> | |
47 | #include <linux/parser.h> | |
48 | #include <linux/stat.h> | |
49 | #include <linux/cdrom.h> | |
50 | #include <linux/nls.h> | |
1da177e4 LT |
51 | #include <linux/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 | 181 | 0, (SLAB_RECLAIM_ACCOUNT | |
5d097056 VD |
182 | SLAB_MEM_SPREAD | |
183 | SLAB_ACCOUNT), | |
20c2df83 | 184 | init_once); |
28de7948 | 185 | if (!udf_inode_cachep) |
1da177e4 LT |
186 | return -ENOMEM; |
187 | return 0; | |
188 | } | |
189 | ||
190 | static void destroy_inodecache(void) | |
191 | { | |
8c0a8537 KS |
192 | /* |
193 | * Make sure all delayed rcu free inodes are flushed before we | |
194 | * destroy cache. | |
195 | */ | |
196 | rcu_barrier(); | |
1a1d92c1 | 197 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
198 | } |
199 | ||
200 | /* Superblock operations */ | |
ee9b6d61 | 201 | static const struct super_operations udf_sb_ops = { |
28de7948 CG |
202 | .alloc_inode = udf_alloc_inode, |
203 | .destroy_inode = udf_destroy_inode, | |
204 | .write_inode = udf_write_inode, | |
3aac2b62 | 205 | .evict_inode = udf_evict_inode, |
28de7948 | 206 | .put_super = udf_put_super, |
146bca72 | 207 | .sync_fs = udf_sync_fs, |
28de7948 CG |
208 | .statfs = udf_statfs, |
209 | .remount_fs = udf_remount_fs, | |
6da80894 | 210 | .show_options = udf_show_options, |
1da177e4 LT |
211 | }; |
212 | ||
cb00ea35 | 213 | struct udf_options { |
1da177e4 LT |
214 | unsigned char novrs; |
215 | unsigned int blocksize; | |
216 | unsigned int session; | |
217 | unsigned int lastblock; | |
218 | unsigned int anchor; | |
219 | unsigned int volume; | |
220 | unsigned short partition; | |
221 | unsigned int fileset; | |
222 | unsigned int rootdir; | |
223 | unsigned int flags; | |
faa17292 | 224 | umode_t umask; |
c2ba138a EB |
225 | kgid_t gid; |
226 | kuid_t uid; | |
faa17292 AV |
227 | umode_t fmode; |
228 | umode_t dmode; | |
1da177e4 LT |
229 | struct nls_table *nls_map; |
230 | }; | |
231 | ||
232 | static int __init init_udf_fs(void) | |
233 | { | |
234 | int err; | |
28de7948 | 235 | |
1da177e4 LT |
236 | err = init_inodecache(); |
237 | if (err) | |
238 | goto out1; | |
239 | err = register_filesystem(&udf_fstype); | |
240 | if (err) | |
241 | goto out; | |
28de7948 | 242 | |
1da177e4 | 243 | return 0; |
28de7948 CG |
244 | |
245 | out: | |
1da177e4 | 246 | destroy_inodecache(); |
28de7948 CG |
247 | |
248 | out1: | |
1da177e4 LT |
249 | return err; |
250 | } | |
251 | ||
252 | static void __exit exit_udf_fs(void) | |
253 | { | |
254 | unregister_filesystem(&udf_fstype); | |
255 | destroy_inodecache(); | |
256 | } | |
257 | ||
258 | module_init(init_udf_fs) | |
28de7948 | 259 | module_exit(exit_udf_fs) |
1da177e4 | 260 | |
dc5d39be MS |
261 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
262 | { | |
263 | struct udf_sb_info *sbi = UDF_SB(sb); | |
264 | ||
265 | sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), | |
266 | GFP_KERNEL); | |
267 | if (!sbi->s_partmaps) { | |
8076c363 JP |
268 | udf_err(sb, "Unable to allocate space for %d partition maps\n", |
269 | count); | |
dc5d39be MS |
270 | sbi->s_partitions = 0; |
271 | return -ENOMEM; | |
272 | } | |
273 | ||
274 | sbi->s_partitions = count; | |
275 | return 0; | |
276 | } | |
277 | ||
bff943af JK |
278 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
279 | { | |
280 | int i; | |
281 | int nr_groups = bitmap->s_nr_groups; | |
bff943af JK |
282 | |
283 | for (i = 0; i < nr_groups; i++) | |
284 | if (bitmap->s_block_bitmap[i]) | |
285 | brelse(bitmap->s_block_bitmap[i]); | |
286 | ||
1d5cfdb0 | 287 | kvfree(bitmap); |
bff943af JK |
288 | } |
289 | ||
290 | static void udf_free_partition(struct udf_part_map *map) | |
291 | { | |
292 | int i; | |
293 | struct udf_meta_data *mdata; | |
294 | ||
295 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
296 | iput(map->s_uspace.s_table); | |
297 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
298 | iput(map->s_fspace.s_table); | |
299 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
300 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
301 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) | |
302 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); | |
303 | if (map->s_partition_type == UDF_SPARABLE_MAP15) | |
304 | for (i = 0; i < 4; i++) | |
305 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
306 | else if (map->s_partition_type == UDF_METADATA_MAP25) { | |
307 | mdata = &map->s_type_specific.s_metadata; | |
308 | iput(mdata->s_metadata_fe); | |
309 | mdata->s_metadata_fe = NULL; | |
310 | ||
311 | iput(mdata->s_mirror_fe); | |
312 | mdata->s_mirror_fe = NULL; | |
313 | ||
314 | iput(mdata->s_bitmap_fe); | |
315 | mdata->s_bitmap_fe = NULL; | |
316 | } | |
317 | } | |
318 | ||
319 | static void udf_sb_free_partitions(struct super_block *sb) | |
320 | { | |
321 | struct udf_sb_info *sbi = UDF_SB(sb); | |
322 | int i; | |
1b1baff6 NJ |
323 | if (sbi->s_partmaps == NULL) |
324 | return; | |
bff943af JK |
325 | for (i = 0; i < sbi->s_partitions; i++) |
326 | udf_free_partition(&sbi->s_partmaps[i]); | |
327 | kfree(sbi->s_partmaps); | |
328 | sbi->s_partmaps = NULL; | |
329 | } | |
330 | ||
34c80b1d | 331 | static int udf_show_options(struct seq_file *seq, struct dentry *root) |
6da80894 | 332 | { |
34c80b1d | 333 | struct super_block *sb = root->d_sb; |
6da80894 MS |
334 | struct udf_sb_info *sbi = UDF_SB(sb); |
335 | ||
336 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
337 | seq_puts(seq, ",nostrict"); | |
1197e4df | 338 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) |
6da80894 MS |
339 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); |
340 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
341 | seq_puts(seq, ",unhide"); | |
342 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
343 | seq_puts(seq, ",undelete"); | |
344 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
345 | seq_puts(seq, ",noadinicb"); | |
346 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
347 | seq_puts(seq, ",shortad"); | |
348 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
349 | seq_puts(seq, ",uid=forget"); | |
350 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) | |
351 | seq_puts(seq, ",uid=ignore"); | |
352 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) | |
353 | seq_puts(seq, ",gid=forget"); | |
354 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) | |
355 | seq_puts(seq, ",gid=ignore"); | |
356 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) | |
c2ba138a | 357 | seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid)); |
6da80894 | 358 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) |
c2ba138a | 359 | seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid)); |
6da80894 | 360 | if (sbi->s_umask != 0) |
faa17292 | 361 | seq_printf(seq, ",umask=%ho", sbi->s_umask); |
87bc730c | 362 | if (sbi->s_fmode != UDF_INVALID_MODE) |
faa17292 | 363 | seq_printf(seq, ",mode=%ho", sbi->s_fmode); |
87bc730c | 364 | if (sbi->s_dmode != UDF_INVALID_MODE) |
faa17292 | 365 | seq_printf(seq, ",dmode=%ho", sbi->s_dmode); |
6da80894 MS |
366 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) |
367 | seq_printf(seq, ",session=%u", sbi->s_session); | |
368 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) | |
369 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
40346005 JK |
370 | if (sbi->s_anchor != 0) |
371 | seq_printf(seq, ",anchor=%u", sbi->s_anchor); | |
6da80894 MS |
372 | /* |
373 | * volume, partition, fileset and rootdir seem to be ignored | |
374 | * currently | |
375 | */ | |
376 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) | |
377 | seq_puts(seq, ",utf8"); | |
378 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
379 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
1da177e4 LT |
384 | /* |
385 | * udf_parse_options | |
386 | * | |
387 | * PURPOSE | |
388 | * Parse mount options. | |
389 | * | |
390 | * DESCRIPTION | |
391 | * The following mount options are supported: | |
392 | * | |
393 | * gid= Set the default group. | |
394 | * umask= Set the default umask. | |
7ac9bcd5 MS |
395 | * mode= Set the default file permissions. |
396 | * dmode= Set the default directory permissions. | |
1da177e4 LT |
397 | * uid= Set the default user. |
398 | * bs= Set the block size. | |
399 | * unhide Show otherwise hidden files. | |
400 | * undelete Show deleted files in lists. | |
401 | * adinicb Embed data in the inode (default) | |
402 | * noadinicb Don't embed data in the inode | |
403 | * shortad Use short ad's | |
404 | * longad Use long ad's (default) | |
405 | * nostrict Unset strict conformance | |
406 | * iocharset= Set the NLS character set | |
407 | * | |
408 | * The remaining are for debugging and disaster recovery: | |
409 | * | |
28de7948 | 410 | * novrs Skip volume sequence recognition |
1da177e4 LT |
411 | * |
412 | * The following expect a offset from 0. | |
413 | * | |
414 | * session= Set the CDROM session (default= last session) | |
415 | * anchor= Override standard anchor location. (default= 256) | |
416 | * volume= Override the VolumeDesc location. (unused) | |
417 | * partition= Override the PartitionDesc location. (unused) | |
418 | * lastblock= Set the last block of the filesystem/ | |
419 | * | |
420 | * The following expect a offset from the partition root. | |
421 | * | |
422 | * fileset= Override the fileset block location. (unused) | |
423 | * rootdir= Override the root directory location. (unused) | |
424 | * WARNING: overriding the rootdir to a non-directory may | |
425 | * yield highly unpredictable results. | |
426 | * | |
427 | * PRE-CONDITIONS | |
428 | * options Pointer to mount options string. | |
429 | * uopts Pointer to mount options variable. | |
430 | * | |
431 | * POST-CONDITIONS | |
432 | * <return> 1 Mount options parsed okay. | |
433 | * <return> 0 Error parsing mount options. | |
434 | * | |
435 | * HISTORY | |
436 | * July 1, 1997 - Andrew E. Mileski | |
437 | * Written, tested, and released. | |
438 | */ | |
28de7948 | 439 | |
1da177e4 LT |
440 | enum { |
441 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
442 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
443 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
444 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
445 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
7ac9bcd5 MS |
446 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, |
447 | Opt_fmode, Opt_dmode | |
1da177e4 LT |
448 | }; |
449 | ||
a447c093 | 450 | static const match_table_t tokens = { |
28de7948 CG |
451 | {Opt_novrs, "novrs"}, |
452 | {Opt_nostrict, "nostrict"}, | |
453 | {Opt_bs, "bs=%u"}, | |
454 | {Opt_unhide, "unhide"}, | |
455 | {Opt_undelete, "undelete"}, | |
456 | {Opt_noadinicb, "noadinicb"}, | |
457 | {Opt_adinicb, "adinicb"}, | |
458 | {Opt_shortad, "shortad"}, | |
459 | {Opt_longad, "longad"}, | |
460 | {Opt_uforget, "uid=forget"}, | |
461 | {Opt_uignore, "uid=ignore"}, | |
462 | {Opt_gforget, "gid=forget"}, | |
463 | {Opt_gignore, "gid=ignore"}, | |
464 | {Opt_gid, "gid=%u"}, | |
465 | {Opt_uid, "uid=%u"}, | |
466 | {Opt_umask, "umask=%o"}, | |
467 | {Opt_session, "session=%u"}, | |
468 | {Opt_lastblock, "lastblock=%u"}, | |
469 | {Opt_anchor, "anchor=%u"}, | |
470 | {Opt_volume, "volume=%u"}, | |
471 | {Opt_partition, "partition=%u"}, | |
472 | {Opt_fileset, "fileset=%u"}, | |
473 | {Opt_rootdir, "rootdir=%u"}, | |
474 | {Opt_utf8, "utf8"}, | |
475 | {Opt_iocharset, "iocharset=%s"}, | |
7ac9bcd5 MS |
476 | {Opt_fmode, "mode=%o"}, |
477 | {Opt_dmode, "dmode=%o"}, | |
28de7948 | 478 | {Opt_err, NULL} |
1da177e4 LT |
479 | }; |
480 | ||
6da80894 MS |
481 | static int udf_parse_options(char *options, struct udf_options *uopt, |
482 | bool remount) | |
1da177e4 LT |
483 | { |
484 | char *p; | |
485 | int option; | |
486 | ||
487 | uopt->novrs = 0; | |
1da177e4 LT |
488 | uopt->partition = 0xFFFF; |
489 | uopt->session = 0xFFFFFFFF; | |
490 | uopt->lastblock = 0; | |
491 | uopt->anchor = 0; | |
492 | uopt->volume = 0xFFFFFFFF; | |
493 | uopt->rootdir = 0xFFFFFFFF; | |
494 | uopt->fileset = 0xFFFFFFFF; | |
495 | uopt->nls_map = NULL; | |
496 | ||
497 | if (!options) | |
498 | return 1; | |
499 | ||
cb00ea35 | 500 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
501 | substring_t args[MAX_OPT_ARGS]; |
502 | int token; | |
8c6915ae | 503 | unsigned n; |
1da177e4 LT |
504 | if (!*p) |
505 | continue; | |
506 | ||
507 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
508 | switch (token) { |
509 | case Opt_novrs: | |
510 | uopt->novrs = 1; | |
4136801a | 511 | break; |
cb00ea35 CG |
512 | case Opt_bs: |
513 | if (match_int(&args[0], &option)) | |
514 | return 0; | |
8c6915ae FF |
515 | n = option; |
516 | if (n != 512 && n != 1024 && n != 2048 && n != 4096) | |
517 | return 0; | |
518 | uopt->blocksize = n; | |
1197e4df | 519 | uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); |
cb00ea35 CG |
520 | break; |
521 | case Opt_unhide: | |
522 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
523 | break; | |
524 | case Opt_undelete: | |
525 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
526 | break; | |
527 | case Opt_noadinicb: | |
528 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
529 | break; | |
530 | case Opt_adinicb: | |
531 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
532 | break; | |
533 | case Opt_shortad: | |
534 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
535 | break; | |
536 | case Opt_longad: | |
537 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
538 | break; | |
539 | case Opt_gid: | |
540 | if (match_int(args, &option)) | |
541 | return 0; | |
c2ba138a EB |
542 | uopt->gid = make_kgid(current_user_ns(), option); |
543 | if (!gid_valid(uopt->gid)) | |
544 | return 0; | |
ca76d2d8 | 545 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
546 | break; |
547 | case Opt_uid: | |
548 | if (match_int(args, &option)) | |
549 | return 0; | |
c2ba138a EB |
550 | uopt->uid = make_kuid(current_user_ns(), option); |
551 | if (!uid_valid(uopt->uid)) | |
552 | return 0; | |
ca76d2d8 | 553 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
554 | break; |
555 | case Opt_umask: | |
556 | if (match_octal(args, &option)) | |
557 | return 0; | |
558 | uopt->umask = option; | |
559 | break; | |
560 | case Opt_nostrict: | |
561 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
562 | break; | |
563 | case Opt_session: | |
564 | if (match_int(args, &option)) | |
565 | return 0; | |
566 | uopt->session = option; | |
6da80894 MS |
567 | if (!remount) |
568 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
569 | break; |
570 | case Opt_lastblock: | |
571 | if (match_int(args, &option)) | |
572 | return 0; | |
573 | uopt->lastblock = option; | |
6da80894 MS |
574 | if (!remount) |
575 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
576 | break; |
577 | case Opt_anchor: | |
578 | if (match_int(args, &option)) | |
579 | return 0; | |
580 | uopt->anchor = option; | |
581 | break; | |
582 | case Opt_volume: | |
583 | if (match_int(args, &option)) | |
584 | return 0; | |
585 | uopt->volume = option; | |
586 | break; | |
587 | case Opt_partition: | |
588 | if (match_int(args, &option)) | |
589 | return 0; | |
590 | uopt->partition = option; | |
591 | break; | |
592 | case Opt_fileset: | |
593 | if (match_int(args, &option)) | |
594 | return 0; | |
595 | uopt->fileset = option; | |
596 | break; | |
597 | case Opt_rootdir: | |
598 | if (match_int(args, &option)) | |
599 | return 0; | |
600 | uopt->rootdir = option; | |
601 | break; | |
602 | case Opt_utf8: | |
603 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
604 | break; | |
1da177e4 | 605 | #ifdef CONFIG_UDF_NLS |
cb00ea35 CG |
606 | case Opt_iocharset: |
607 | uopt->nls_map = load_nls(args[0].from); | |
608 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
609 | break; | |
1da177e4 | 610 | #endif |
cb00ea35 CG |
611 | case Opt_uignore: |
612 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); | |
613 | break; | |
614 | case Opt_uforget: | |
615 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
616 | break; | |
617 | case Opt_gignore: | |
618 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); | |
619 | break; | |
620 | case Opt_gforget: | |
621 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
622 | break; | |
7ac9bcd5 MS |
623 | case Opt_fmode: |
624 | if (match_octal(args, &option)) | |
625 | return 0; | |
626 | uopt->fmode = option & 0777; | |
627 | break; | |
628 | case Opt_dmode: | |
629 | if (match_octal(args, &option)) | |
630 | return 0; | |
631 | uopt->dmode = option & 0777; | |
632 | break; | |
cb00ea35 | 633 | default: |
78ace70c | 634 | pr_err("bad mount option \"%s\" or missing value\n", p); |
1da177e4 LT |
635 | return 0; |
636 | } | |
637 | } | |
638 | return 1; | |
639 | } | |
640 | ||
cb00ea35 | 641 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
642 | { |
643 | struct udf_options uopt; | |
6c79e987 | 644 | struct udf_sb_info *sbi = UDF_SB(sb); |
c79d967d | 645 | int error = 0; |
69d75671 | 646 | struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb); |
1da177e4 | 647 | |
02b9984d | 648 | sync_filesystem(sb); |
69d75671 JK |
649 | if (lvidiu) { |
650 | int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
e729eac6 JK |
651 | if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY)) |
652 | return -EACCES; | |
653 | } | |
654 | ||
6c79e987 MS |
655 | uopt.flags = sbi->s_flags; |
656 | uopt.uid = sbi->s_uid; | |
657 | uopt.gid = sbi->s_gid; | |
658 | uopt.umask = sbi->s_umask; | |
7ac9bcd5 MS |
659 | uopt.fmode = sbi->s_fmode; |
660 | uopt.dmode = sbi->s_dmode; | |
1da177e4 | 661 | |
6da80894 | 662 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
663 | return -EINVAL; |
664 | ||
c03cad24 | 665 | write_lock(&sbi->s_cred_lock); |
6c79e987 MS |
666 | sbi->s_flags = uopt.flags; |
667 | sbi->s_uid = uopt.uid; | |
668 | sbi->s_gid = uopt.gid; | |
669 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
670 | sbi->s_fmode = uopt.fmode; |
671 | sbi->s_dmode = uopt.dmode; | |
c03cad24 | 672 | write_unlock(&sbi->s_cred_lock); |
1da177e4 | 673 | |
c79d967d CH |
674 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
675 | goto out_unlock; | |
676 | ||
36350462 | 677 | if (*flags & MS_RDONLY) |
1da177e4 | 678 | udf_close_lvid(sb); |
36350462 | 679 | else |
1da177e4 LT |
680 | udf_open_lvid(sb); |
681 | ||
c79d967d | 682 | out_unlock: |
c79d967d | 683 | return error; |
1da177e4 LT |
684 | } |
685 | ||
40346005 JK |
686 | /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ |
687 | /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
688 | static loff_t udf_check_vsd(struct super_block *sb) | |
1da177e4 LT |
689 | { |
690 | struct volStructDesc *vsd = NULL; | |
44499602 | 691 | loff_t sector = VSD_FIRST_SECTOR_OFFSET; |
1da177e4 LT |
692 | int sectorsize; |
693 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
694 | int nsr02 = 0; |
695 | int nsr03 = 0; | |
6c79e987 | 696 | struct udf_sb_info *sbi; |
1da177e4 | 697 | |
6c79e987 | 698 | sbi = UDF_SB(sb); |
1da177e4 LT |
699 | if (sb->s_blocksize < sizeof(struct volStructDesc)) |
700 | sectorsize = sizeof(struct volStructDesc); | |
701 | else | |
702 | sectorsize = sb->s_blocksize; | |
703 | ||
6c79e987 | 704 | sector += (sbi->s_session << sb->s_blocksize_bits); |
1da177e4 LT |
705 | |
706 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
706047a7 SM |
707 | (unsigned int)(sector >> sb->s_blocksize_bits), |
708 | sb->s_blocksize); | |
44499602 PF |
709 | /* Process the sequence (if applicable). The hard limit on the sector |
710 | * offset is arbitrary, hopefully large enough so that all valid UDF | |
711 | * filesystems will be recognised. There is no mention of an upper | |
712 | * bound to the size of the volume recognition area in the standard. | |
713 | * The limit will prevent the code to read all the sectors of a | |
714 | * specially crafted image (like a bluray disc full of CD001 sectors), | |
715 | * potentially causing minutes or even hours of uninterruptible I/O | |
716 | * activity. This actually happened with uninitialised SSD partitions | |
717 | * (all 0xFF) before the check for the limit and all valid IDs were | |
718 | * added */ | |
719 | for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET; | |
720 | sector += sectorsize) { | |
1da177e4 LT |
721 | /* Read a block */ |
722 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
723 | if (!bh) | |
724 | break; | |
725 | ||
726 | /* Look for ISO descriptors */ | |
727 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 728 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 729 | |
44499602 | 730 | if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
3a71fc5d | 731 | VSD_STD_ID_LEN)) { |
cb00ea35 CG |
732 | switch (vsd->structType) { |
733 | case 0: | |
734 | udf_debug("ISO9660 Boot Record found\n"); | |
735 | break; | |
736 | case 1: | |
a983f368 | 737 | udf_debug("ISO9660 Primary Volume Descriptor found\n"); |
cb00ea35 CG |
738 | break; |
739 | case 2: | |
a983f368 | 740 | udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); |
cb00ea35 CG |
741 | break; |
742 | case 3: | |
a983f368 | 743 | udf_debug("ISO9660 Volume Partition Descriptor found\n"); |
cb00ea35 CG |
744 | break; |
745 | case 255: | |
a983f368 | 746 | udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); |
cb00ea35 CG |
747 | break; |
748 | default: | |
749 | udf_debug("ISO9660 VRS (%u) found\n", | |
750 | vsd->structType); | |
751 | break; | |
1da177e4 | 752 | } |
3a71fc5d MS |
753 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
754 | VSD_STD_ID_LEN)) | |
755 | ; /* nothing */ | |
756 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
757 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 758 | brelse(bh); |
1da177e4 | 759 | break; |
3a71fc5d MS |
760 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
761 | VSD_STD_ID_LEN)) | |
1da177e4 | 762 | nsr02 = sector; |
3a71fc5d MS |
763 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
764 | VSD_STD_ID_LEN)) | |
1da177e4 | 765 | nsr03 = sector; |
44499602 PF |
766 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2, |
767 | VSD_STD_ID_LEN)) | |
768 | ; /* nothing */ | |
769 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02, | |
770 | VSD_STD_ID_LEN)) | |
771 | ; /* nothing */ | |
772 | else { | |
773 | /* invalid id : end of volume recognition area */ | |
774 | brelse(bh); | |
775 | break; | |
776 | } | |
3bf25cb4 | 777 | brelse(bh); |
1da177e4 LT |
778 | } |
779 | ||
780 | if (nsr03) | |
781 | return nsr03; | |
782 | else if (nsr02) | |
783 | return nsr02; | |
44499602 PF |
784 | else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) == |
785 | VSD_FIRST_SECTOR_OFFSET) | |
1da177e4 LT |
786 | return -1; |
787 | else | |
788 | return 0; | |
789 | } | |
790 | ||
3a71fc5d | 791 | static int udf_find_fileset(struct super_block *sb, |
5ca4e4be PE |
792 | struct kernel_lb_addr *fileset, |
793 | struct kernel_lb_addr *root) | |
1da177e4 LT |
794 | { |
795 | struct buffer_head *bh = NULL; | |
796 | long lastblock; | |
797 | uint16_t ident; | |
6c79e987 | 798 | struct udf_sb_info *sbi; |
1da177e4 LT |
799 | |
800 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 801 | fileset->partitionReferenceNum != 0xFFFF) { |
97e961fd | 802 | bh = udf_read_ptagged(sb, fileset, 0, &ident); |
1da177e4 | 803 | |
28de7948 | 804 | if (!bh) { |
1da177e4 | 805 | return 1; |
28de7948 | 806 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 807 | brelse(bh); |
1da177e4 LT |
808 | return 1; |
809 | } | |
cb00ea35 | 810 | |
1da177e4 LT |
811 | } |
812 | ||
6c79e987 | 813 | sbi = UDF_SB(sb); |
3a71fc5d MS |
814 | if (!bh) { |
815 | /* Search backwards through the partitions */ | |
5ca4e4be | 816 | struct kernel_lb_addr newfileset; |
1da177e4 | 817 | |
28de7948 | 818 | /* --> cvg: FIXME - is it reasonable? */ |
1da177e4 | 819 | return 1; |
cb00ea35 | 820 | |
6c79e987 | 821 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
cb00ea35 CG |
822 | (newfileset.partitionReferenceNum != 0xFFFF && |
823 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
824 | fileset->partitionReferenceNum == 0xFFFF); | |
825 | newfileset.partitionReferenceNum--) { | |
6c79e987 MS |
826 | lastblock = sbi->s_partmaps |
827 | [newfileset.partitionReferenceNum] | |
828 | .s_partition_len; | |
1da177e4 LT |
829 | newfileset.logicalBlockNum = 0; |
830 | ||
cb00ea35 | 831 | do { |
97e961fd | 832 | bh = udf_read_ptagged(sb, &newfileset, 0, |
3a71fc5d | 833 | &ident); |
cb00ea35 CG |
834 | if (!bh) { |
835 | newfileset.logicalBlockNum++; | |
1da177e4 LT |
836 | continue; |
837 | } | |
838 | ||
cb00ea35 CG |
839 | switch (ident) { |
840 | case TAG_IDENT_SBD: | |
28de7948 CG |
841 | { |
842 | struct spaceBitmapDesc *sp; | |
4b11111a MS |
843 | sp = (struct spaceBitmapDesc *) |
844 | bh->b_data; | |
28de7948 CG |
845 | newfileset.logicalBlockNum += 1 + |
846 | ((le32_to_cpu(sp->numOfBytes) + | |
4b11111a MS |
847 | sizeof(struct spaceBitmapDesc) |
848 | - 1) >> sb->s_blocksize_bits); | |
28de7948 CG |
849 | brelse(bh); |
850 | break; | |
851 | } | |
cb00ea35 | 852 | case TAG_IDENT_FSD: |
28de7948 CG |
853 | *fileset = newfileset; |
854 | break; | |
cb00ea35 | 855 | default: |
28de7948 CG |
856 | newfileset.logicalBlockNum++; |
857 | brelse(bh); | |
858 | bh = NULL; | |
859 | break; | |
1da177e4 | 860 | } |
28de7948 CG |
861 | } while (newfileset.logicalBlockNum < lastblock && |
862 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
863 | fileset->partitionReferenceNum == 0xFFFF); | |
1da177e4 LT |
864 | } |
865 | } | |
866 | ||
867 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 868 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
1da177e4 | 869 | udf_debug("Fileset at block=%d, partition=%d\n", |
cb00ea35 CG |
870 | fileset->logicalBlockNum, |
871 | fileset->partitionReferenceNum); | |
1da177e4 | 872 | |
6c79e987 | 873 | sbi->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 874 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 875 | brelse(bh); |
1da177e4 LT |
876 | return 0; |
877 | } | |
878 | return 1; | |
879 | } | |
880 | ||
d759bfa4 JK |
881 | /* |
882 | * Load primary Volume Descriptor Sequence | |
883 | * | |
884 | * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence | |
885 | * should be tried. | |
886 | */ | |
c0eb31ed | 887 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
888 | { |
889 | struct primaryVolDesc *pvoldesc; | |
ba9aadd8 | 890 | struct ustr *instr, *outstr; |
c0eb31ed JK |
891 | struct buffer_head *bh; |
892 | uint16_t ident; | |
d759bfa4 | 893 | int ret = -ENOMEM; |
ba9aadd8 MS |
894 | |
895 | instr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
896 | if (!instr) | |
d759bfa4 | 897 | return -ENOMEM; |
ba9aadd8 MS |
898 | |
899 | outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
900 | if (!outstr) | |
901 | goto out1; | |
c0eb31ed JK |
902 | |
903 | bh = udf_read_tagged(sb, block, block, &ident); | |
d759bfa4 JK |
904 | if (!bh) { |
905 | ret = -EAGAIN; | |
ba9aadd8 | 906 | goto out2; |
d759bfa4 | 907 | } |
ba9aadd8 | 908 | |
d759bfa4 JK |
909 | if (ident != TAG_IDENT_PVD) { |
910 | ret = -EIO; | |
911 | goto out_bh; | |
912 | } | |
1da177e4 LT |
913 | |
914 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
915 | ||
56774805 MS |
916 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
917 | pvoldesc->recordingDateAndTime)) { | |
af15a298 | 918 | #ifdef UDFFS_DEBUG |
5ca4e4be | 919 | struct timestamp *ts = &pvoldesc->recordingDateAndTime; |
a983f368 | 920 | udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", |
af15a298 MS |
921 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, |
922 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
923 | #endif | |
1da177e4 LT |
924 | } |
925 | ||
e9d4cf41 FF |
926 | if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) { |
927 | ret = udf_CS0toUTF8(outstr, instr); | |
928 | if (ret < 0) | |
929 | goto out_bh; | |
930 | ||
931 | strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, | |
932 | outstr->u_len > 31 ? 31 : outstr->u_len); | |
933 | udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident); | |
934 | } | |
1da177e4 | 935 | |
792352cb | 936 | if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) { |
e9d4cf41 FF |
937 | ret = udf_CS0toUTF8(outstr, instr); |
938 | if (ret < 0) | |
939 | goto out_bh; | |
940 | ||
941 | udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); | |
792352cb | 942 | } |
c0eb31ed | 943 | |
ba9aadd8 | 944 | ret = 0; |
d759bfa4 JK |
945 | out_bh: |
946 | brelse(bh); | |
ba9aadd8 MS |
947 | out2: |
948 | kfree(outstr); | |
949 | out1: | |
950 | kfree(instr); | |
951 | return ret; | |
1da177e4 LT |
952 | } |
953 | ||
3080a74e NJ |
954 | struct inode *udf_find_metadata_inode_efe(struct super_block *sb, |
955 | u32 meta_file_loc, u32 partition_num) | |
956 | { | |
957 | struct kernel_lb_addr addr; | |
958 | struct inode *metadata_fe; | |
959 | ||
960 | addr.logicalBlockNum = meta_file_loc; | |
961 | addr.partitionReferenceNum = partition_num; | |
962 | ||
6174c2eb | 963 | metadata_fe = udf_iget_special(sb, &addr); |
3080a74e | 964 | |
6d3d5e86 | 965 | if (IS_ERR(metadata_fe)) { |
3080a74e | 966 | udf_warn(sb, "metadata inode efe not found\n"); |
6d3d5e86 JK |
967 | return metadata_fe; |
968 | } | |
969 | if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { | |
3080a74e NJ |
970 | udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); |
971 | iput(metadata_fe); | |
6d3d5e86 | 972 | return ERR_PTR(-EIO); |
3080a74e NJ |
973 | } |
974 | ||
975 | return metadata_fe; | |
976 | } | |
977 | ||
bfb257a5 JK |
978 | static int udf_load_metadata_files(struct super_block *sb, int partition) |
979 | { | |
980 | struct udf_sb_info *sbi = UDF_SB(sb); | |
981 | struct udf_part_map *map; | |
982 | struct udf_meta_data *mdata; | |
5ca4e4be | 983 | struct kernel_lb_addr addr; |
6d3d5e86 | 984 | struct inode *fe; |
bfb257a5 JK |
985 | |
986 | map = &sbi->s_partmaps[partition]; | |
987 | mdata = &map->s_type_specific.s_metadata; | |
988 | ||
989 | /* metadata address */ | |
bfb257a5 | 990 | udf_debug("Metadata file location: block = %d part = %d\n", |
3080a74e | 991 | mdata->s_meta_file_loc, map->s_partition_num); |
bfb257a5 | 992 | |
6d3d5e86 JK |
993 | fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc, |
994 | map->s_partition_num); | |
995 | if (IS_ERR(fe)) { | |
3080a74e NJ |
996 | /* mirror file entry */ |
997 | udf_debug("Mirror metadata file location: block = %d part = %d\n", | |
998 | mdata->s_mirror_file_loc, map->s_partition_num); | |
bfb257a5 | 999 | |
6d3d5e86 JK |
1000 | fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc, |
1001 | map->s_partition_num); | |
bfb257a5 | 1002 | |
6d3d5e86 | 1003 | if (IS_ERR(fe)) { |
3080a74e | 1004 | udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); |
6d3d5e86 | 1005 | return PTR_ERR(fe); |
3080a74e | 1006 | } |
6d3d5e86 JK |
1007 | mdata->s_mirror_fe = fe; |
1008 | } else | |
1009 | mdata->s_metadata_fe = fe; | |
1010 | ||
bfb257a5 JK |
1011 | |
1012 | /* | |
1013 | * bitmap file entry | |
1014 | * Note: | |
1015 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) | |
1016 | */ | |
1017 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { | |
1018 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; | |
1019 | addr.partitionReferenceNum = map->s_partition_num; | |
1020 | ||
1021 | udf_debug("Bitmap file location: block = %d part = %d\n", | |
a983f368 | 1022 | addr.logicalBlockNum, addr.partitionReferenceNum); |
bfb257a5 | 1023 | |
6174c2eb | 1024 | fe = udf_iget_special(sb, &addr); |
6d3d5e86 | 1025 | if (IS_ERR(fe)) { |
bfb257a5 | 1026 | if (sb->s_flags & MS_RDONLY) |
a40ecd7b | 1027 | udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); |
bfb257a5 | 1028 | else { |
8076c363 | 1029 | udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); |
6d3d5e86 | 1030 | return PTR_ERR(fe); |
bfb257a5 | 1031 | } |
6d3d5e86 JK |
1032 | } else |
1033 | mdata->s_bitmap_fe = fe; | |
bfb257a5 JK |
1034 | } |
1035 | ||
1036 | udf_debug("udf_load_metadata_files Ok\n"); | |
bfb257a5 | 1037 | return 0; |
bfb257a5 JK |
1038 | } |
1039 | ||
28de7948 | 1040 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
5ca4e4be | 1041 | struct kernel_lb_addr *root) |
1da177e4 LT |
1042 | { |
1043 | struct fileSetDesc *fset; | |
1044 | ||
1045 | fset = (struct fileSetDesc *)bh->b_data; | |
1046 | ||
1047 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
1048 | ||
6c79e987 | 1049 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 1050 | |
cb00ea35 CG |
1051 | udf_debug("Rootdir at block=%d, partition=%d\n", |
1052 | root->logicalBlockNum, root->partitionReferenceNum); | |
1da177e4 LT |
1053 | } |
1054 | ||
883cb9d1 MS |
1055 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
1056 | { | |
1057 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
1058 | return DIV_ROUND_UP(map->s_partition_len + |
1059 | (sizeof(struct spaceBitmapDesc) << 3), | |
1060 | sb->s_blocksize * 8); | |
883cb9d1 MS |
1061 | } |
1062 | ||
66e1da3f MS |
1063 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
1064 | { | |
66e1da3f MS |
1065 | struct udf_bitmap *bitmap; |
1066 | int nr_groups; | |
1067 | int size; | |
1068 | ||
883cb9d1 | 1069 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
1070 | size = sizeof(struct udf_bitmap) + |
1071 | (sizeof(struct buffer_head *) * nr_groups); | |
1072 | ||
1073 | if (size <= PAGE_SIZE) | |
ed2ae6f6 | 1074 | bitmap = kzalloc(size, GFP_KERNEL); |
66e1da3f | 1075 | else |
ed2ae6f6 | 1076 | bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ |
66e1da3f | 1077 | |
75b09e02 | 1078 | if (bitmap == NULL) |
66e1da3f | 1079 | return NULL; |
66e1da3f | 1080 | |
66e1da3f MS |
1081 | bitmap->s_nr_groups = nr_groups; |
1082 | return bitmap; | |
1083 | } | |
1084 | ||
3fb38dfa JK |
1085 | static int udf_fill_partdesc_info(struct super_block *sb, |
1086 | struct partitionDesc *p, int p_index) | |
1da177e4 | 1087 | { |
6c79e987 | 1088 | struct udf_part_map *map; |
165923fa | 1089 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 1090 | struct partitionHeaderDesc *phd; |
165923fa | 1091 | |
3fb38dfa | 1092 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
1093 | |
1094 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
1095 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
1096 | ||
1097 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
1098 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
1099 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
1100 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
1101 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
1102 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
1103 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
1104 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
1105 | ||
a983f368 JP |
1106 | udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n", |
1107 | p_index, map->s_partition_type, | |
1108 | map->s_partition_root, map->s_partition_len); | |
165923fa MS |
1109 | |
1110 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
1111 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
3fb38dfa | 1112 | return 0; |
165923fa MS |
1113 | |
1114 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1115 | if (phd->unallocSpaceTable.extLength) { | |
5ca4e4be | 1116 | struct kernel_lb_addr loc = { |
165923fa MS |
1117 | .logicalBlockNum = le32_to_cpu( |
1118 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 1119 | .partitionReferenceNum = p_index, |
165923fa | 1120 | }; |
6d3d5e86 | 1121 | struct inode *inode; |
165923fa | 1122 | |
6174c2eb | 1123 | inode = udf_iget_special(sb, &loc); |
6d3d5e86 | 1124 | if (IS_ERR(inode)) { |
165923fa | 1125 | udf_debug("cannot load unallocSpaceTable (part %d)\n", |
a983f368 | 1126 | p_index); |
6d3d5e86 | 1127 | return PTR_ERR(inode); |
165923fa | 1128 | } |
6d3d5e86 | 1129 | map->s_uspace.s_table = inode; |
165923fa MS |
1130 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; |
1131 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", | |
a983f368 | 1132 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1133 | } |
1134 | ||
1135 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1136 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1137 | if (!bitmap) | |
d759bfa4 | 1138 | return -ENOMEM; |
165923fa | 1139 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1140 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1141 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1142 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
a983f368 JP |
1143 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", |
1144 | p_index, bitmap->s_extPosition); | |
165923fa MS |
1145 | } |
1146 | ||
1147 | if (phd->partitionIntegrityTable.extLength) | |
3fb38dfa | 1148 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); |
165923fa MS |
1149 | |
1150 | if (phd->freedSpaceTable.extLength) { | |
5ca4e4be | 1151 | struct kernel_lb_addr loc = { |
165923fa MS |
1152 | .logicalBlockNum = le32_to_cpu( |
1153 | phd->freedSpaceTable.extPosition), | |
3fb38dfa | 1154 | .partitionReferenceNum = p_index, |
165923fa | 1155 | }; |
6d3d5e86 | 1156 | struct inode *inode; |
165923fa | 1157 | |
6174c2eb | 1158 | inode = udf_iget_special(sb, &loc); |
6d3d5e86 | 1159 | if (IS_ERR(inode)) { |
3fb38dfa | 1160 | udf_debug("cannot load freedSpaceTable (part %d)\n", |
a983f368 | 1161 | p_index); |
6d3d5e86 | 1162 | return PTR_ERR(inode); |
165923fa | 1163 | } |
6d3d5e86 | 1164 | map->s_fspace.s_table = inode; |
165923fa MS |
1165 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; |
1166 | udf_debug("freedSpaceTable (part %d) @ %ld\n", | |
a983f368 | 1167 | p_index, map->s_fspace.s_table->i_ino); |
165923fa MS |
1168 | } |
1169 | ||
1170 | if (phd->freedSpaceBitmap.extLength) { | |
3fb38dfa JK |
1171 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1172 | if (!bitmap) | |
d759bfa4 | 1173 | return -ENOMEM; |
165923fa | 1174 | map->s_fspace.s_bitmap = bitmap; |
2e0838fd | 1175 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1176 | phd->freedSpaceBitmap.extPosition); |
2e0838fd | 1177 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
a983f368 JP |
1178 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", |
1179 | p_index, bitmap->s_extPosition); | |
165923fa | 1180 | } |
3fb38dfa JK |
1181 | return 0; |
1182 | } | |
1183 | ||
e971b0b9 JK |
1184 | static void udf_find_vat_block(struct super_block *sb, int p_index, |
1185 | int type1_index, sector_t start_block) | |
38b74a53 JK |
1186 | { |
1187 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1188 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
e971b0b9 | 1189 | sector_t vat_block; |
5ca4e4be | 1190 | struct kernel_lb_addr ino; |
6d3d5e86 | 1191 | struct inode *inode; |
e971b0b9 JK |
1192 | |
1193 | /* | |
1194 | * VAT file entry is in the last recorded block. Some broken disks have | |
1195 | * it a few blocks before so try a bit harder... | |
1196 | */ | |
1197 | ino.partitionReferenceNum = type1_index; | |
1198 | for (vat_block = start_block; | |
1199 | vat_block >= map->s_partition_root && | |
6d3d5e86 | 1200 | vat_block >= start_block - 3; vat_block--) { |
e971b0b9 | 1201 | ino.logicalBlockNum = vat_block - map->s_partition_root; |
6174c2eb | 1202 | inode = udf_iget_special(sb, &ino); |
6d3d5e86 JK |
1203 | if (!IS_ERR(inode)) { |
1204 | sbi->s_vat_inode = inode; | |
1205 | break; | |
1206 | } | |
e971b0b9 JK |
1207 | } |
1208 | } | |
1209 | ||
1210 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) | |
1211 | { | |
1212 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1213 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
fa5e0815 JK |
1214 | struct buffer_head *bh = NULL; |
1215 | struct udf_inode_info *vati; | |
1216 | uint32_t pos; | |
1217 | struct virtualAllocationTable20 *vat20; | |
4bf17af0 | 1218 | sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; |
38b74a53 | 1219 | |
e971b0b9 | 1220 | udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); |
4bf17af0 JK |
1221 | if (!sbi->s_vat_inode && |
1222 | sbi->s_last_block != blocks - 1) { | |
78ace70c JP |
1223 | pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", |
1224 | (unsigned long)sbi->s_last_block, | |
1225 | (unsigned long)blocks - 1); | |
e971b0b9 | 1226 | udf_find_vat_block(sb, p_index, type1_index, blocks - 1); |
4bf17af0 | 1227 | } |
38b74a53 | 1228 | if (!sbi->s_vat_inode) |
d759bfa4 | 1229 | return -EIO; |
38b74a53 JK |
1230 | |
1231 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
47c9358a | 1232 | map->s_type_specific.s_virtual.s_start_offset = 0; |
38b74a53 JK |
1233 | map->s_type_specific.s_virtual.s_num_entries = |
1234 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1235 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
fa5e0815 JK |
1236 | vati = UDF_I(sbi->s_vat_inode); |
1237 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1238 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1239 | bh = sb_bread(sb, pos); | |
1240 | if (!bh) | |
d759bfa4 | 1241 | return -EIO; |
fa5e0815 JK |
1242 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; |
1243 | } else { | |
1244 | vat20 = (struct virtualAllocationTable20 *) | |
1245 | vati->i_ext.i_data; | |
1246 | } | |
38b74a53 | 1247 | |
38b74a53 | 1248 | map->s_type_specific.s_virtual.s_start_offset = |
47c9358a | 1249 | le16_to_cpu(vat20->lengthHeader); |
38b74a53 JK |
1250 | map->s_type_specific.s_virtual.s_num_entries = |
1251 | (sbi->s_vat_inode->i_size - | |
1252 | map->s_type_specific.s_virtual. | |
1253 | s_start_offset) >> 2; | |
1254 | brelse(bh); | |
1255 | } | |
1256 | return 0; | |
1257 | } | |
1258 | ||
d759bfa4 JK |
1259 | /* |
1260 | * Load partition descriptor block | |
1261 | * | |
1262 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor | |
1263 | * sequence. | |
1264 | */ | |
3fb38dfa JK |
1265 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
1266 | { | |
1267 | struct buffer_head *bh; | |
1268 | struct partitionDesc *p; | |
1269 | struct udf_part_map *map; | |
1270 | struct udf_sb_info *sbi = UDF_SB(sb); | |
38b74a53 | 1271 | int i, type1_idx; |
3fb38dfa JK |
1272 | uint16_t partitionNumber; |
1273 | uint16_t ident; | |
d759bfa4 | 1274 | int ret; |
3fb38dfa JK |
1275 | |
1276 | bh = udf_read_tagged(sb, block, block, &ident); | |
1277 | if (!bh) | |
d759bfa4 JK |
1278 | return -EAGAIN; |
1279 | if (ident != TAG_IDENT_PD) { | |
1280 | ret = 0; | |
3fb38dfa | 1281 | goto out_bh; |
d759bfa4 | 1282 | } |
3fb38dfa JK |
1283 | |
1284 | p = (struct partitionDesc *)bh->b_data; | |
1285 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
38b74a53 | 1286 | |
bfb257a5 | 1287 | /* First scan for TYPE1, SPARABLE and METADATA partitions */ |
3fb38dfa JK |
1288 | for (i = 0; i < sbi->s_partitions; i++) { |
1289 | map = &sbi->s_partmaps[i]; | |
1290 | udf_debug("Searching map: (%d == %d)\n", | |
1291 | map->s_partition_num, partitionNumber); | |
38b74a53 JK |
1292 | if (map->s_partition_num == partitionNumber && |
1293 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1294 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
3fb38dfa JK |
1295 | break; |
1296 | } | |
1297 | ||
38b74a53 | 1298 | if (i >= sbi->s_partitions) { |
3fb38dfa JK |
1299 | udf_debug("Partition (%d) not found in partition map\n", |
1300 | partitionNumber); | |
d759bfa4 | 1301 | ret = 0; |
3fb38dfa JK |
1302 | goto out_bh; |
1303 | } | |
165923fa | 1304 | |
3fb38dfa | 1305 | ret = udf_fill_partdesc_info(sb, p, i); |
d759bfa4 JK |
1306 | if (ret < 0) |
1307 | goto out_bh; | |
38b74a53 JK |
1308 | |
1309 | /* | |
bfb257a5 JK |
1310 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
1311 | * PHYSICAL partitions are already set up | |
38b74a53 JK |
1312 | */ |
1313 | type1_idx = i; | |
44499602 PF |
1314 | #ifdef UDFFS_DEBUG |
1315 | map = NULL; /* supress 'maybe used uninitialized' warning */ | |
1316 | #endif | |
38b74a53 JK |
1317 | for (i = 0; i < sbi->s_partitions; i++) { |
1318 | map = &sbi->s_partmaps[i]; | |
1319 | ||
1320 | if (map->s_partition_num == partitionNumber && | |
1321 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
bfb257a5 JK |
1322 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
1323 | map->s_partition_type == UDF_METADATA_MAP25)) | |
38b74a53 JK |
1324 | break; |
1325 | } | |
1326 | ||
d759bfa4 JK |
1327 | if (i >= sbi->s_partitions) { |
1328 | ret = 0; | |
38b74a53 | 1329 | goto out_bh; |
d759bfa4 | 1330 | } |
38b74a53 JK |
1331 | |
1332 | ret = udf_fill_partdesc_info(sb, p, i); | |
d759bfa4 | 1333 | if (ret < 0) |
38b74a53 JK |
1334 | goto out_bh; |
1335 | ||
bfb257a5 JK |
1336 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
1337 | ret = udf_load_metadata_files(sb, i); | |
d759bfa4 | 1338 | if (ret < 0) { |
78ace70c JP |
1339 | udf_err(sb, "error loading MetaData partition map %d\n", |
1340 | i); | |
bfb257a5 JK |
1341 | goto out_bh; |
1342 | } | |
1343 | } else { | |
e729eac6 JK |
1344 | /* |
1345 | * If we have a partition with virtual map, we don't handle | |
1346 | * writing to it (we overwrite blocks instead of relocating | |
1347 | * them). | |
1348 | */ | |
1349 | if (!(sb->s_flags & MS_RDONLY)) { | |
1350 | ret = -EACCES; | |
1351 | goto out_bh; | |
1352 | } | |
bfb257a5 | 1353 | ret = udf_load_vat(sb, i, type1_idx); |
d759bfa4 | 1354 | if (ret < 0) |
bfb257a5 | 1355 | goto out_bh; |
bfb257a5 | 1356 | } |
d759bfa4 | 1357 | ret = 0; |
c0eb31ed | 1358 | out_bh: |
2e0838fd | 1359 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1360 | brelse(bh); |
1361 | return ret; | |
1da177e4 LT |
1362 | } |
1363 | ||
1df2ae31 JK |
1364 | static int udf_load_sparable_map(struct super_block *sb, |
1365 | struct udf_part_map *map, | |
1366 | struct sparablePartitionMap *spm) | |
1367 | { | |
1368 | uint32_t loc; | |
1369 | uint16_t ident; | |
1370 | struct sparingTable *st; | |
1371 | struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing; | |
1372 | int i; | |
1373 | struct buffer_head *bh; | |
1374 | ||
1375 | map->s_partition_type = UDF_SPARABLE_MAP15; | |
1376 | sdata->s_packet_len = le16_to_cpu(spm->packetLength); | |
1377 | if (!is_power_of_2(sdata->s_packet_len)) { | |
1378 | udf_err(sb, "error loading logical volume descriptor: " | |
1379 | "Invalid packet length %u\n", | |
1380 | (unsigned)sdata->s_packet_len); | |
1381 | return -EIO; | |
1382 | } | |
1383 | if (spm->numSparingTables > 4) { | |
1384 | udf_err(sb, "error loading logical volume descriptor: " | |
1385 | "Too many sparing tables (%d)\n", | |
1386 | (int)spm->numSparingTables); | |
1387 | return -EIO; | |
1388 | } | |
1389 | ||
1390 | for (i = 0; i < spm->numSparingTables; i++) { | |
1391 | loc = le32_to_cpu(spm->locSparingTable[i]); | |
1392 | bh = udf_read_tagged(sb, loc, loc, &ident); | |
1393 | if (!bh) | |
1394 | continue; | |
1395 | ||
1396 | st = (struct sparingTable *)bh->b_data; | |
1397 | if (ident != 0 || | |
1398 | strncmp(st->sparingIdent.ident, UDF_ID_SPARING, | |
1399 | strlen(UDF_ID_SPARING)) || | |
1400 | sizeof(*st) + le16_to_cpu(st->reallocationTableLen) > | |
1401 | sb->s_blocksize) { | |
1402 | brelse(bh); | |
1403 | continue; | |
1404 | } | |
1405 | ||
1406 | sdata->s_spar_map[i] = bh; | |
1407 | } | |
1408 | map->s_partition_func = udf_get_pblock_spar15; | |
1409 | return 0; | |
1410 | } | |
1411 | ||
c0eb31ed | 1412 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
5ca4e4be | 1413 | struct kernel_lb_addr *fileset) |
1da177e4 LT |
1414 | { |
1415 | struct logicalVolDesc *lvd; | |
1df2ae31 | 1416 | int i, offset; |
1da177e4 | 1417 | uint8_t type; |
6c79e987 | 1418 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1419 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1420 | uint16_t ident; |
1421 | struct buffer_head *bh; | |
adee11b2 | 1422 | unsigned int table_len; |
d759bfa4 | 1423 | int ret; |
1da177e4 | 1424 | |
c0eb31ed JK |
1425 | bh = udf_read_tagged(sb, block, block, &ident); |
1426 | if (!bh) | |
d759bfa4 | 1427 | return -EAGAIN; |
c0eb31ed | 1428 | BUG_ON(ident != TAG_IDENT_LVD); |
1da177e4 | 1429 | lvd = (struct logicalVolDesc *)bh->b_data; |
adee11b2 | 1430 | table_len = le32_to_cpu(lvd->mapTableLength); |
57b9655d | 1431 | if (table_len > sb->s_blocksize - sizeof(*lvd)) { |
adee11b2 JK |
1432 | udf_err(sb, "error loading logical volume descriptor: " |
1433 | "Partition table too long (%u > %lu)\n", table_len, | |
1434 | sb->s_blocksize - sizeof(*lvd)); | |
d759bfa4 | 1435 | ret = -EIO; |
adee11b2 JK |
1436 | goto out_bh; |
1437 | } | |
1da177e4 | 1438 | |
cb14d340 JK |
1439 | ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
1440 | if (ret) | |
c0eb31ed | 1441 | goto out_bh; |
1da177e4 | 1442 | |
cb00ea35 | 1443 | for (i = 0, offset = 0; |
adee11b2 | 1444 | i < sbi->s_partitions && offset < table_len; |
4b11111a MS |
1445 | i++, offset += gpm->partitionMapLength) { |
1446 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1447 | gpm = (struct genericPartitionMap *) | |
1448 | &(lvd->partitionMaps[offset]); | |
1449 | type = gpm->partitionMapType; | |
cb00ea35 | 1450 | if (type == 1) { |
4b11111a MS |
1451 | struct genericPartitionMap1 *gpm1 = |
1452 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1453 | map->s_partition_type = UDF_TYPE1_MAP15; |
1454 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1455 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1456 | map->s_partition_func = NULL; | |
cb00ea35 | 1457 | } else if (type == 2) { |
4b11111a MS |
1458 | struct udfPartitionMap2 *upm2 = |
1459 | (struct udfPartitionMap2 *)gpm; | |
1460 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1461 | strlen(UDF_ID_VIRTUAL))) { | |
1462 | u16 suf = | |
1463 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1464 | identSuffix)[0]); | |
c82a1275 | 1465 | if (suf < 0x0200) { |
4b11111a MS |
1466 | map->s_partition_type = |
1467 | UDF_VIRTUAL_MAP15; | |
1468 | map->s_partition_func = | |
1469 | udf_get_pblock_virt15; | |
c82a1275 | 1470 | } else { |
4b11111a MS |
1471 | map->s_partition_type = |
1472 | UDF_VIRTUAL_MAP20; | |
1473 | map->s_partition_func = | |
1474 | udf_get_pblock_virt20; | |
1da177e4 | 1475 | } |
4b11111a MS |
1476 | } else if (!strncmp(upm2->partIdent.ident, |
1477 | UDF_ID_SPARABLE, | |
1478 | strlen(UDF_ID_SPARABLE))) { | |
d759bfa4 JK |
1479 | ret = udf_load_sparable_map(sb, map, |
1480 | (struct sparablePartitionMap *)gpm); | |
1481 | if (ret < 0) | |
1df2ae31 | 1482 | goto out_bh; |
bfb257a5 JK |
1483 | } else if (!strncmp(upm2->partIdent.ident, |
1484 | UDF_ID_METADATA, | |
1485 | strlen(UDF_ID_METADATA))) { | |
1486 | struct udf_meta_data *mdata = | |
1487 | &map->s_type_specific.s_metadata; | |
1488 | struct metadataPartitionMap *mdm = | |
1489 | (struct metadataPartitionMap *) | |
1490 | &(lvd->partitionMaps[offset]); | |
a983f368 JP |
1491 | udf_debug("Parsing Logical vol part %d type %d id=%s\n", |
1492 | i, type, UDF_ID_METADATA); | |
bfb257a5 JK |
1493 | |
1494 | map->s_partition_type = UDF_METADATA_MAP25; | |
1495 | map->s_partition_func = udf_get_pblock_meta25; | |
1496 | ||
1497 | mdata->s_meta_file_loc = | |
1498 | le32_to_cpu(mdm->metadataFileLoc); | |
1499 | mdata->s_mirror_file_loc = | |
1500 | le32_to_cpu(mdm->metadataMirrorFileLoc); | |
1501 | mdata->s_bitmap_file_loc = | |
1502 | le32_to_cpu(mdm->metadataBitmapFileLoc); | |
1503 | mdata->s_alloc_unit_size = | |
1504 | le32_to_cpu(mdm->allocUnitSize); | |
1505 | mdata->s_align_unit_size = | |
1506 | le16_to_cpu(mdm->alignUnitSize); | |
ed47a7d0 JK |
1507 | if (mdm->flags & 0x01) |
1508 | mdata->s_flags |= MF_DUPLICATE_MD; | |
bfb257a5 JK |
1509 | |
1510 | udf_debug("Metadata Ident suffix=0x%x\n", | |
a983f368 JP |
1511 | le16_to_cpu(*(__le16 *) |
1512 | mdm->partIdent.identSuffix)); | |
bfb257a5 | 1513 | udf_debug("Metadata part num=%d\n", |
a983f368 | 1514 | le16_to_cpu(mdm->partitionNum)); |
bfb257a5 | 1515 | udf_debug("Metadata part alloc unit size=%d\n", |
a983f368 | 1516 | le32_to_cpu(mdm->allocUnitSize)); |
bfb257a5 | 1517 | udf_debug("Metadata file loc=%d\n", |
a983f368 | 1518 | le32_to_cpu(mdm->metadataFileLoc)); |
bfb257a5 | 1519 | udf_debug("Mirror file loc=%d\n", |
a983f368 | 1520 | le32_to_cpu(mdm->metadataMirrorFileLoc)); |
bfb257a5 | 1521 | udf_debug("Bitmap file loc=%d\n", |
a983f368 | 1522 | le32_to_cpu(mdm->metadataBitmapFileLoc)); |
ed47a7d0 JK |
1523 | udf_debug("Flags: %d %d\n", |
1524 | mdata->s_flags, mdm->flags); | |
cb00ea35 | 1525 | } else { |
3a71fc5d MS |
1526 | udf_debug("Unknown ident: %s\n", |
1527 | upm2->partIdent.ident); | |
1da177e4 LT |
1528 | continue; |
1529 | } | |
6c79e987 MS |
1530 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1531 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 LT |
1532 | } |
1533 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
a983f368 | 1534 | i, map->s_partition_num, type, map->s_volumeseqnum); |
1da177e4 LT |
1535 | } |
1536 | ||
cb00ea35 | 1537 | if (fileset) { |
5ca4e4be | 1538 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1539 | |
1540 | *fileset = lelb_to_cpu(la->extLocation); | |
a983f368 JP |
1541 | udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n", |
1542 | fileset->logicalBlockNum, | |
28de7948 | 1543 | fileset->partitionReferenceNum); |
1da177e4 LT |
1544 | } |
1545 | if (lvd->integritySeqExt.extLength) | |
1546 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
d759bfa4 | 1547 | ret = 0; |
c0eb31ed JK |
1548 | out_bh: |
1549 | brelse(bh); | |
1550 | return ret; | |
1da177e4 LT |
1551 | } |
1552 | ||
1553 | /* | |
1554 | * udf_load_logicalvolint | |
1555 | * | |
1556 | */ | |
5ca4e4be | 1557 | static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) |
1da177e4 LT |
1558 | { |
1559 | struct buffer_head *bh = NULL; | |
1560 | uint16_t ident; | |
6c79e987 MS |
1561 | struct udf_sb_info *sbi = UDF_SB(sb); |
1562 | struct logicalVolIntegrityDesc *lvid; | |
1da177e4 LT |
1563 | |
1564 | while (loc.extLength > 0 && | |
cb00ea35 CG |
1565 | (bh = udf_read_tagged(sb, loc.extLocation, |
1566 | loc.extLocation, &ident)) && | |
1567 | ident == TAG_IDENT_LVID) { | |
6c79e987 MS |
1568 | sbi->s_lvid_bh = bh; |
1569 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
cb00ea35 | 1570 | |
6c79e987 | 1571 | if (lvid->nextIntegrityExt.extLength) |
3a71fc5d | 1572 | udf_load_logicalvolint(sb, |
6c79e987 | 1573 | leea_to_cpu(lvid->nextIntegrityExt)); |
cb00ea35 | 1574 | |
6c79e987 | 1575 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1576 | brelse(bh); |
1da177e4 | 1577 | loc.extLength -= sb->s_blocksize; |
cb00ea35 | 1578 | loc.extLocation++; |
1da177e4 | 1579 | } |
6c79e987 | 1580 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1581 | brelse(bh); |
1da177e4 LT |
1582 | } |
1583 | ||
e7a4eb86 VN |
1584 | /* |
1585 | * Maximum number of Terminating Descriptor redirections. The chosen number is | |
1586 | * arbitrary - just that we hopefully don't limit any real use of rewritten | |
1587 | * inode on write-once media but avoid looping for too long on corrupted media. | |
1588 | */ | |
1589 | #define UDF_MAX_TD_NESTING 64 | |
1590 | ||
1da177e4 | 1591 | /* |
d759bfa4 JK |
1592 | * Process a main/reserve volume descriptor sequence. |
1593 | * @block First block of first extent of the sequence. | |
1594 | * @lastblock Lastblock of first extent of the sequence. | |
1595 | * @fileset There we store extent containing root fileset | |
1da177e4 | 1596 | * |
d759bfa4 JK |
1597 | * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor |
1598 | * sequence | |
1da177e4 | 1599 | */ |
d759bfa4 JK |
1600 | static noinline int udf_process_sequence( |
1601 | struct super_block *sb, | |
1602 | sector_t block, sector_t lastblock, | |
1603 | struct kernel_lb_addr *fileset) | |
1da177e4 LT |
1604 | { |
1605 | struct buffer_head *bh = NULL; | |
1606 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
4b11111a | 1607 | struct udf_vds_record *curr; |
1da177e4 LT |
1608 | struct generic_desc *gd; |
1609 | struct volDescPtr *vdp; | |
2b8f9421 | 1610 | bool done = false; |
1da177e4 LT |
1611 | uint32_t vdsn; |
1612 | uint16_t ident; | |
1613 | long next_s = 0, next_e = 0; | |
d759bfa4 | 1614 | int ret; |
e7a4eb86 | 1615 | unsigned int indirections = 0; |
1da177e4 LT |
1616 | |
1617 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1618 | ||
c0eb31ed JK |
1619 | /* |
1620 | * Read the main descriptor sequence and find which descriptors | |
1621 | * are in it. | |
1622 | */ | |
cb00ea35 | 1623 | for (; (!done && block <= lastblock); block++) { |
1da177e4 LT |
1624 | |
1625 | bh = udf_read_tagged(sb, block, block, &ident); | |
c0eb31ed | 1626 | if (!bh) { |
78ace70c JP |
1627 | udf_err(sb, |
1628 | "Block %llu of volume descriptor sequence is corrupted or we could not read it\n", | |
1629 | (unsigned long long)block); | |
d759bfa4 | 1630 | return -EAGAIN; |
c0eb31ed | 1631 | } |
1da177e4 LT |
1632 | |
1633 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1634 | gd = (struct generic_desc *)bh->b_data; | |
1635 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1636 | switch (ident) { |
28de7948 | 1637 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
4b11111a MS |
1638 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
1639 | if (vdsn >= curr->volDescSeqNum) { | |
1640 | curr->volDescSeqNum = vdsn; | |
1641 | curr->block = block; | |
cb00ea35 CG |
1642 | } |
1643 | break; | |
28de7948 | 1644 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
4b11111a MS |
1645 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
1646 | if (vdsn >= curr->volDescSeqNum) { | |
1647 | curr->volDescSeqNum = vdsn; | |
1648 | curr->block = block; | |
cb00ea35 CG |
1649 | |
1650 | vdp = (struct volDescPtr *)bh->b_data; | |
4b11111a MS |
1651 | next_s = le32_to_cpu( |
1652 | vdp->nextVolDescSeqExt.extLocation); | |
1653 | next_e = le32_to_cpu( | |
1654 | vdp->nextVolDescSeqExt.extLength); | |
cb00ea35 CG |
1655 | next_e = next_e >> sb->s_blocksize_bits; |
1656 | next_e += next_s; | |
1657 | } | |
1658 | break; | |
28de7948 | 1659 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
4b11111a MS |
1660 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
1661 | if (vdsn >= curr->volDescSeqNum) { | |
1662 | curr->volDescSeqNum = vdsn; | |
1663 | curr->block = block; | |
cb00ea35 CG |
1664 | } |
1665 | break; | |
28de7948 | 1666 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
4b11111a MS |
1667 | curr = &vds[VDS_POS_PARTITION_DESC]; |
1668 | if (!curr->block) | |
1669 | curr->block = block; | |
cb00ea35 | 1670 | break; |
28de7948 | 1671 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
4b11111a MS |
1672 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
1673 | if (vdsn >= curr->volDescSeqNum) { | |
1674 | curr->volDescSeqNum = vdsn; | |
1675 | curr->block = block; | |
cb00ea35 CG |
1676 | } |
1677 | break; | |
28de7948 | 1678 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
4b11111a MS |
1679 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
1680 | if (vdsn >= curr->volDescSeqNum) { | |
1681 | curr->volDescSeqNum = vdsn; | |
1682 | curr->block = block; | |
cb00ea35 CG |
1683 | } |
1684 | break; | |
28de7948 | 1685 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
e7a4eb86 VN |
1686 | if (++indirections > UDF_MAX_TD_NESTING) { |
1687 | udf_err(sb, "too many TDs (max %u supported)\n", UDF_MAX_TD_NESTING); | |
1688 | brelse(bh); | |
1689 | return -EIO; | |
1690 | } | |
1691 | ||
cb00ea35 CG |
1692 | vds[VDS_POS_TERMINATING_DESC].block = block; |
1693 | if (next_e) { | |
1694 | block = next_s; | |
1695 | lastblock = next_e; | |
1696 | next_s = next_e = 0; | |
4b11111a | 1697 | } else |
2b8f9421 | 1698 | done = true; |
cb00ea35 | 1699 | break; |
1da177e4 | 1700 | } |
3bf25cb4 | 1701 | brelse(bh); |
1da177e4 | 1702 | } |
c0eb31ed JK |
1703 | /* |
1704 | * Now read interesting descriptors again and process them | |
1705 | * in a suitable order | |
1706 | */ | |
1707 | if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { | |
78ace70c | 1708 | udf_err(sb, "Primary Volume Descriptor not found!\n"); |
d759bfa4 JK |
1709 | return -EAGAIN; |
1710 | } | |
1711 | ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block); | |
1712 | if (ret < 0) | |
1713 | return ret; | |
1714 | ||
1715 | if (vds[VDS_POS_LOGICAL_VOL_DESC].block) { | |
1716 | ret = udf_load_logicalvol(sb, | |
1717 | vds[VDS_POS_LOGICAL_VOL_DESC].block, | |
1718 | fileset); | |
1719 | if (ret < 0) | |
1720 | return ret; | |
c0eb31ed | 1721 | } |
165923fa | 1722 | |
c0eb31ed JK |
1723 | if (vds[VDS_POS_PARTITION_DESC].block) { |
1724 | /* | |
1725 | * We rescan the whole descriptor sequence to find | |
1726 | * partition descriptor blocks and process them. | |
1727 | */ | |
1728 | for (block = vds[VDS_POS_PARTITION_DESC].block; | |
1729 | block < vds[VDS_POS_TERMINATING_DESC].block; | |
d759bfa4 JK |
1730 | block++) { |
1731 | ret = udf_load_partdesc(sb, block); | |
1732 | if (ret < 0) | |
1733 | return ret; | |
1734 | } | |
1da177e4 LT |
1735 | } |
1736 | ||
1737 | return 0; | |
1738 | } | |
1739 | ||
d759bfa4 JK |
1740 | /* |
1741 | * Load Volume Descriptor Sequence described by anchor in bh | |
1742 | * | |
1743 | * Returns <0 on error, 0 on success | |
1744 | */ | |
40346005 JK |
1745 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, |
1746 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1747 | { |
40346005 | 1748 | struct anchorVolDescPtr *anchor; |
d759bfa4 JK |
1749 | sector_t main_s, main_e, reserve_s, reserve_e; |
1750 | int ret; | |
1da177e4 | 1751 | |
40346005 JK |
1752 | anchor = (struct anchorVolDescPtr *)bh->b_data; |
1753 | ||
1754 | /* Locate the main sequence */ | |
1755 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1756 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1757 | main_e = main_e >> sb->s_blocksize_bits; | |
1758 | main_e += main_s; | |
1759 | ||
1760 | /* Locate the reserve sequence */ | |
1761 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); | |
1762 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); | |
1763 | reserve_e = reserve_e >> sb->s_blocksize_bits; | |
1764 | reserve_e += reserve_s; | |
1765 | ||
1766 | /* Process the main & reserve sequences */ | |
1767 | /* responsible for finding the PartitionDesc(s) */ | |
d759bfa4 JK |
1768 | ret = udf_process_sequence(sb, main_s, main_e, fileset); |
1769 | if (ret != -EAGAIN) | |
1770 | return ret; | |
bff943af | 1771 | udf_sb_free_partitions(sb); |
d759bfa4 JK |
1772 | ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset); |
1773 | if (ret < 0) { | |
1774 | udf_sb_free_partitions(sb); | |
1775 | /* No sequence was OK, return -EIO */ | |
1776 | if (ret == -EAGAIN) | |
1777 | ret = -EIO; | |
1778 | } | |
1779 | return ret; | |
1da177e4 LT |
1780 | } |
1781 | ||
40346005 JK |
1782 | /* |
1783 | * Check whether there is an anchor block in the given block and | |
1784 | * load Volume Descriptor Sequence if so. | |
d759bfa4 JK |
1785 | * |
1786 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor | |
1787 | * block | |
40346005 JK |
1788 | */ |
1789 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, | |
1790 | struct kernel_lb_addr *fileset) | |
1197e4df | 1791 | { |
40346005 JK |
1792 | struct buffer_head *bh; |
1793 | uint16_t ident; | |
1794 | int ret; | |
1197e4df | 1795 | |
40346005 JK |
1796 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
1797 | udf_fixed_to_variable(block) >= | |
1798 | sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) | |
d759bfa4 | 1799 | return -EAGAIN; |
40346005 JK |
1800 | |
1801 | bh = udf_read_tagged(sb, block, block, &ident); | |
1802 | if (!bh) | |
d759bfa4 | 1803 | return -EAGAIN; |
40346005 JK |
1804 | if (ident != TAG_IDENT_AVDP) { |
1805 | brelse(bh); | |
d759bfa4 | 1806 | return -EAGAIN; |
1197e4df | 1807 | } |
40346005 JK |
1808 | ret = udf_load_sequence(sb, bh, fileset); |
1809 | brelse(bh); | |
1810 | return ret; | |
1197e4df CL |
1811 | } |
1812 | ||
d759bfa4 JK |
1813 | /* |
1814 | * Search for an anchor volume descriptor pointer. | |
1815 | * | |
1816 | * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set | |
1817 | * of anchors. | |
1818 | */ | |
1819 | static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock, | |
1820 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1821 | { |
40346005 | 1822 | sector_t last[6]; |
38b74a53 | 1823 | int i; |
40346005 JK |
1824 | struct udf_sb_info *sbi = UDF_SB(sb); |
1825 | int last_count = 0; | |
d759bfa4 | 1826 | int ret; |
1da177e4 | 1827 | |
40346005 JK |
1828 | /* First try user provided anchor */ |
1829 | if (sbi->s_anchor) { | |
d759bfa4 JK |
1830 | ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset); |
1831 | if (ret != -EAGAIN) | |
1832 | return ret; | |
40346005 JK |
1833 | } |
1834 | /* | |
1835 | * according to spec, anchor is in either: | |
1836 | * block 256 | |
1837 | * lastblock-256 | |
1838 | * lastblock | |
1839 | * however, if the disc isn't closed, it could be 512. | |
1840 | */ | |
d759bfa4 JK |
1841 | ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset); |
1842 | if (ret != -EAGAIN) | |
1843 | return ret; | |
40346005 JK |
1844 | /* |
1845 | * The trouble is which block is the last one. Drives often misreport | |
1846 | * this so we try various possibilities. | |
1847 | */ | |
d759bfa4 JK |
1848 | last[last_count++] = *lastblock; |
1849 | if (*lastblock >= 1) | |
1850 | last[last_count++] = *lastblock - 1; | |
1851 | last[last_count++] = *lastblock + 1; | |
1852 | if (*lastblock >= 2) | |
1853 | last[last_count++] = *lastblock - 2; | |
1854 | if (*lastblock >= 150) | |
1855 | last[last_count++] = *lastblock - 150; | |
1856 | if (*lastblock >= 152) | |
1857 | last[last_count++] = *lastblock - 152; | |
1da177e4 | 1858 | |
40346005 JK |
1859 | for (i = 0; i < last_count; i++) { |
1860 | if (last[i] >= sb->s_bdev->bd_inode->i_size >> | |
1861 | sb->s_blocksize_bits) | |
28f7c4d4 | 1862 | continue; |
d759bfa4 JK |
1863 | ret = udf_check_anchor_block(sb, last[i], fileset); |
1864 | if (ret != -EAGAIN) { | |
1865 | if (!ret) | |
1866 | *lastblock = last[i]; | |
1867 | return ret; | |
1868 | } | |
40346005 | 1869 | if (last[i] < 256) |
28f7c4d4 | 1870 | continue; |
d759bfa4 JK |
1871 | ret = udf_check_anchor_block(sb, last[i] - 256, fileset); |
1872 | if (ret != -EAGAIN) { | |
1873 | if (!ret) | |
1874 | *lastblock = last[i]; | |
1875 | return ret; | |
1876 | } | |
40346005 | 1877 | } |
28f7c4d4 | 1878 | |
40346005 | 1879 | /* Finally try block 512 in case media is open */ |
d759bfa4 | 1880 | return udf_check_anchor_block(sb, sbi->s_session + 512, fileset); |
40346005 | 1881 | } |
28f7c4d4 | 1882 | |
40346005 JK |
1883 | /* |
1884 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from | |
1885 | * area specified by it. The function expects sbi->s_lastblock to be the last | |
1886 | * block on the media. | |
1887 | * | |
d759bfa4 JK |
1888 | * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor |
1889 | * was not found. | |
40346005 JK |
1890 | */ |
1891 | static int udf_find_anchor(struct super_block *sb, | |
1892 | struct kernel_lb_addr *fileset) | |
1893 | { | |
40346005 | 1894 | struct udf_sb_info *sbi = UDF_SB(sb); |
d759bfa4 JK |
1895 | sector_t lastblock = sbi->s_last_block; |
1896 | int ret; | |
28f7c4d4 | 1897 | |
d759bfa4 JK |
1898 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1899 | if (ret != -EAGAIN) | |
40346005 | 1900 | goto out; |
1da177e4 | 1901 | |
40346005 JK |
1902 | /* No anchor found? Try VARCONV conversion of block numbers */ |
1903 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
d759bfa4 | 1904 | lastblock = udf_variable_to_fixed(sbi->s_last_block); |
40346005 | 1905 | /* Firstly, we try to not convert number of the last block */ |
d759bfa4 JK |
1906 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1907 | if (ret != -EAGAIN) | |
40346005 | 1908 | goto out; |
1da177e4 | 1909 | |
d759bfa4 | 1910 | lastblock = sbi->s_last_block; |
40346005 | 1911 | /* Secondly, we try with converted number of the last block */ |
d759bfa4 JK |
1912 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1913 | if (ret < 0) { | |
40346005 JK |
1914 | /* VARCONV didn't help. Clear it. */ |
1915 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); | |
1da177e4 | 1916 | } |
40346005 | 1917 | out: |
d759bfa4 JK |
1918 | if (ret == 0) |
1919 | sbi->s_last_block = lastblock; | |
1920 | return ret; | |
40346005 | 1921 | } |
1da177e4 | 1922 | |
40346005 JK |
1923 | /* |
1924 | * Check Volume Structure Descriptor, find Anchor block and load Volume | |
d759bfa4 JK |
1925 | * Descriptor Sequence. |
1926 | * | |
1927 | * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor | |
1928 | * block was not found. | |
40346005 JK |
1929 | */ |
1930 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, | |
1931 | int silent, struct kernel_lb_addr *fileset) | |
1932 | { | |
1933 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1934 | loff_t nsr_off; | |
d759bfa4 | 1935 | int ret; |
40346005 JK |
1936 | |
1937 | if (!sb_set_blocksize(sb, uopt->blocksize)) { | |
1938 | if (!silent) | |
78ace70c | 1939 | udf_warn(sb, "Bad block size\n"); |
d759bfa4 | 1940 | return -EINVAL; |
40346005 JK |
1941 | } |
1942 | sbi->s_last_block = uopt->lastblock; | |
1943 | if (!uopt->novrs) { | |
1944 | /* Check that it is NSR02 compliant */ | |
1945 | nsr_off = udf_check_vsd(sb); | |
1946 | if (!nsr_off) { | |
1947 | if (!silent) | |
78ace70c | 1948 | udf_warn(sb, "No VRS found\n"); |
40346005 JK |
1949 | return 0; |
1950 | } | |
1951 | if (nsr_off == -1) | |
44499602 PF |
1952 | udf_debug("Failed to read sector at offset %d. " |
1953 | "Assuming open disc. Skipping validity " | |
1954 | "check\n", VSD_FIRST_SECTOR_OFFSET); | |
40346005 JK |
1955 | if (!sbi->s_last_block) |
1956 | sbi->s_last_block = udf_get_last_block(sb); | |
1957 | } else { | |
1958 | udf_debug("Validity check skipped because of novrs option\n"); | |
28f7c4d4 | 1959 | } |
1da177e4 | 1960 | |
40346005 JK |
1961 | /* Look for anchor block and load Volume Descriptor Sequence */ |
1962 | sbi->s_anchor = uopt->anchor; | |
d759bfa4 JK |
1963 | ret = udf_find_anchor(sb, fileset); |
1964 | if (ret < 0) { | |
1965 | if (!silent && ret == -EAGAIN) | |
78ace70c | 1966 | udf_warn(sb, "No anchor found\n"); |
d759bfa4 | 1967 | return ret; |
40346005 | 1968 | } |
d759bfa4 | 1969 | return 0; |
1da177e4 LT |
1970 | } |
1971 | ||
1972 | static void udf_open_lvid(struct super_block *sb) | |
1973 | { | |
6c79e987 MS |
1974 | struct udf_sb_info *sbi = UDF_SB(sb); |
1975 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
1976 | struct logicalVolIntegrityDesc *lvid; |
1977 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
146bca72 | 1978 | |
165923fa MS |
1979 | if (!bh) |
1980 | return; | |
165923fa | 1981 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
69d75671 JK |
1982 | lvidiu = udf_sb_lvidiu(sb); |
1983 | if (!lvidiu) | |
1984 | return; | |
165923fa | 1985 | |
69d75671 | 1986 | mutex_lock(&sbi->s_alloc_mutex); |
165923fa MS |
1987 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
1988 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1989 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, | |
1990 | CURRENT_TIME); | |
146bca72 | 1991 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); |
165923fa MS |
1992 | |
1993 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1994 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 1995 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
1996 | |
1997 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1998 | mark_buffer_dirty(bh); | |
146bca72 | 1999 | sbi->s_lvid_dirty = 0; |
949f4a7c | 2000 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
2001 | /* Make opening of filesystem visible on the media immediately */ |
2002 | sync_dirty_buffer(bh); | |
1da177e4 LT |
2003 | } |
2004 | ||
2005 | static void udf_close_lvid(struct super_block *sb) | |
2006 | { | |
6c79e987 MS |
2007 | struct udf_sb_info *sbi = UDF_SB(sb); |
2008 | struct buffer_head *bh = sbi->s_lvid_bh; | |
2009 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 2010 | struct logicalVolIntegrityDescImpUse *lvidiu; |
28de7948 | 2011 | |
6c79e987 MS |
2012 | if (!bh) |
2013 | return; | |
69d75671 JK |
2014 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
2015 | lvidiu = udf_sb_lvidiu(sb); | |
2016 | if (!lvidiu) | |
2017 | return; | |
6c79e987 | 2018 | |
949f4a7c | 2019 | mutex_lock(&sbi->s_alloc_mutex); |
165923fa MS |
2020 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
2021 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
2022 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); | |
2023 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) | |
2024 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
2025 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
2026 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
2027 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
2028 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
2029 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
2030 | ||
2031 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 2032 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 2033 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
2034 | |
2035 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
853a0c25 JK |
2036 | /* |
2037 | * We set buffer uptodate unconditionally here to avoid spurious | |
2038 | * warnings from mark_buffer_dirty() when previous EIO has marked | |
2039 | * the buffer as !uptodate | |
2040 | */ | |
2041 | set_buffer_uptodate(bh); | |
165923fa | 2042 | mark_buffer_dirty(bh); |
146bca72 | 2043 | sbi->s_lvid_dirty = 0; |
949f4a7c | 2044 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
2045 | /* Make closing of filesystem visible on the media immediately */ |
2046 | sync_dirty_buffer(bh); | |
1da177e4 LT |
2047 | } |
2048 | ||
d664b6af JK |
2049 | u64 lvid_get_unique_id(struct super_block *sb) |
2050 | { | |
2051 | struct buffer_head *bh; | |
2052 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2053 | struct logicalVolIntegrityDesc *lvid; | |
2054 | struct logicalVolHeaderDesc *lvhd; | |
2055 | u64 uniqueID; | |
2056 | u64 ret; | |
2057 | ||
2058 | bh = sbi->s_lvid_bh; | |
2059 | if (!bh) | |
2060 | return 0; | |
2061 | ||
2062 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
2063 | lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; | |
2064 | ||
2065 | mutex_lock(&sbi->s_alloc_mutex); | |
2066 | ret = uniqueID = le64_to_cpu(lvhd->uniqueID); | |
2067 | if (!(++uniqueID & 0xFFFFFFFF)) | |
2068 | uniqueID += 16; | |
2069 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
2070 | mutex_unlock(&sbi->s_alloc_mutex); | |
2071 | mark_buffer_dirty(bh); | |
2072 | ||
2073 | return ret; | |
1da177e4 LT |
2074 | } |
2075 | ||
1da177e4 LT |
2076 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
2077 | { | |
d759bfa4 | 2078 | int ret = -EINVAL; |
cb00ea35 | 2079 | struct inode *inode = NULL; |
1da177e4 | 2080 | struct udf_options uopt; |
5ca4e4be | 2081 | struct kernel_lb_addr rootdir, fileset; |
1da177e4 | 2082 | struct udf_sb_info *sbi; |
9181f8bf | 2083 | bool lvid_open = false; |
1da177e4 LT |
2084 | |
2085 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
c2ba138a EB |
2086 | uopt.uid = INVALID_UID; |
2087 | uopt.gid = INVALID_GID; | |
1da177e4 | 2088 | uopt.umask = 0; |
87bc730c MS |
2089 | uopt.fmode = UDF_INVALID_MODE; |
2090 | uopt.dmode = UDF_INVALID_MODE; | |
1da177e4 | 2091 | |
6c79e987 | 2092 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
9db9f9e3 | 2093 | if (!sbi) |
1da177e4 | 2094 | return -ENOMEM; |
28de7948 | 2095 | |
1da177e4 | 2096 | sb->s_fs_info = sbi; |
1da177e4 | 2097 | |
1e7933de | 2098 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 2099 | |
6da80894 | 2100 | if (!udf_parse_options((char *)options, &uopt, false)) |
fdf2657b | 2101 | goto parse_options_failure; |
1da177e4 LT |
2102 | |
2103 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 2104 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
8076c363 | 2105 | udf_err(sb, "utf8 cannot be combined with iocharset\n"); |
fdf2657b | 2106 | goto parse_options_failure; |
1da177e4 LT |
2107 | } |
2108 | #ifdef CONFIG_UDF_NLS | |
cb00ea35 | 2109 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
2110 | uopt.nls_map = load_nls_default(); |
2111 | if (!uopt.nls_map) | |
2112 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
2113 | else | |
2114 | udf_debug("Using default NLS map\n"); | |
2115 | } | |
2116 | #endif | |
2117 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
2118 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
2119 | ||
2120 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
2121 | fileset.partitionReferenceNum = 0xFFFF; | |
2122 | ||
6c79e987 MS |
2123 | sbi->s_flags = uopt.flags; |
2124 | sbi->s_uid = uopt.uid; | |
2125 | sbi->s_gid = uopt.gid; | |
2126 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
2127 | sbi->s_fmode = uopt.fmode; |
2128 | sbi->s_dmode = uopt.dmode; | |
6c79e987 | 2129 | sbi->s_nls_map = uopt.nls_map; |
c03cad24 | 2130 | rwlock_init(&sbi->s_cred_lock); |
1da177e4 | 2131 | |
cb00ea35 | 2132 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 2133 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 2134 | else |
6c79e987 | 2135 | sbi->s_session = uopt.session; |
1da177e4 | 2136 | |
6c79e987 | 2137 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 2138 | |
40346005 JK |
2139 | /* Fill in the rest of the superblock */ |
2140 | sb->s_op = &udf_sb_ops; | |
2141 | sb->s_export_op = &udf_export_ops; | |
123e9caf | 2142 | |
40346005 JK |
2143 | sb->s_magic = UDF_SUPER_MAGIC; |
2144 | sb->s_time_gran = 1000; | |
2145 | ||
1197e4df | 2146 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { |
40346005 | 2147 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 2148 | } else { |
e1defc4f | 2149 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); |
40346005 | 2150 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
d759bfa4 | 2151 | if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { |
1197e4df | 2152 | if (!silent) |
78ace70c JP |
2153 | pr_notice("Rescanning with blocksize %d\n", |
2154 | UDF_DEFAULT_BLOCKSIZE); | |
dc141a40 AS |
2155 | brelse(sbi->s_lvid_bh); |
2156 | sbi->s_lvid_bh = NULL; | |
1197e4df | 2157 | uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; |
40346005 | 2158 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 2159 | } |
1da177e4 | 2160 | } |
d759bfa4 JK |
2161 | if (ret < 0) { |
2162 | if (ret == -EAGAIN) { | |
2163 | udf_warn(sb, "No partition found (1)\n"); | |
2164 | ret = -EINVAL; | |
2165 | } | |
1da177e4 LT |
2166 | goto error_out; |
2167 | } | |
2168 | ||
6c79e987 | 2169 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
1da177e4 | 2170 | |
6c79e987 | 2171 | if (sbi->s_lvid_bh) { |
4b11111a | 2172 | struct logicalVolIntegrityDescImpUse *lvidiu = |
69d75671 JK |
2173 | udf_sb_lvidiu(sb); |
2174 | uint16_t minUDFReadRev; | |
2175 | uint16_t minUDFWriteRev; | |
1da177e4 | 2176 | |
69d75671 JK |
2177 | if (!lvidiu) { |
2178 | ret = -EINVAL; | |
2179 | goto error_out; | |
2180 | } | |
2181 | minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); | |
2182 | minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
cb00ea35 | 2183 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
78ace70c | 2184 | udf_err(sb, "minUDFReadRev=%x (max is %x)\n", |
69d75671 | 2185 | minUDFReadRev, |
78ace70c | 2186 | UDF_MAX_READ_VERSION); |
d759bfa4 | 2187 | ret = -EINVAL; |
1da177e4 | 2188 | goto error_out; |
e729eac6 JK |
2189 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION && |
2190 | !(sb->s_flags & MS_RDONLY)) { | |
2191 | ret = -EACCES; | |
2192 | goto error_out; | |
2193 | } | |
1da177e4 | 2194 | |
6c79e987 | 2195 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
2196 | |
2197 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
2198 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
2199 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
2200 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
2201 | } | |
2202 | ||
6c79e987 | 2203 | if (!sbi->s_partitions) { |
78ace70c | 2204 | udf_warn(sb, "No partition found (2)\n"); |
d759bfa4 | 2205 | ret = -EINVAL; |
1da177e4 LT |
2206 | goto error_out; |
2207 | } | |
2208 | ||
4b11111a | 2209 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
e729eac6 JK |
2210 | UDF_PART_FLAG_READ_ONLY && |
2211 | !(sb->s_flags & MS_RDONLY)) { | |
2212 | ret = -EACCES; | |
2213 | goto error_out; | |
c1a26e7d | 2214 | } |
39b3f6d6 | 2215 | |
cb00ea35 | 2216 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
78ace70c | 2217 | udf_warn(sb, "No fileset found\n"); |
d759bfa4 | 2218 | ret = -EINVAL; |
1da177e4 LT |
2219 | goto error_out; |
2220 | } | |
2221 | ||
cb00ea35 | 2222 | if (!silent) { |
5ca4e4be | 2223 | struct timestamp ts; |
56774805 | 2224 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); |
78ace70c JP |
2225 | udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
2226 | sbi->s_volume_ident, | |
2227 | le16_to_cpu(ts.year), ts.month, ts.day, | |
56774805 | 2228 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); |
1da177e4 | 2229 | } |
9181f8bf | 2230 | if (!(sb->s_flags & MS_RDONLY)) { |
1da177e4 | 2231 | udf_open_lvid(sb); |
9181f8bf JK |
2232 | lvid_open = true; |
2233 | } | |
1da177e4 LT |
2234 | |
2235 | /* Assign the root inode */ | |
2236 | /* assign inodes by physical block number */ | |
2237 | /* perhaps it's not extensible enough, but for now ... */ | |
97e961fd | 2238 | inode = udf_iget(sb, &rootdir); |
6d3d5e86 | 2239 | if (IS_ERR(inode)) { |
78ace70c | 2240 | udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n", |
cb00ea35 | 2241 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
6d3d5e86 | 2242 | ret = PTR_ERR(inode); |
1da177e4 LT |
2243 | goto error_out; |
2244 | } | |
2245 | ||
2246 | /* Allocate a dentry for the root inode */ | |
48fde701 | 2247 | sb->s_root = d_make_root(inode); |
cb00ea35 | 2248 | if (!sb->s_root) { |
78ace70c | 2249 | udf_err(sb, "Couldn't allocate root dentry\n"); |
d759bfa4 | 2250 | ret = -ENOMEM; |
1da177e4 LT |
2251 | goto error_out; |
2252 | } | |
31170b6a | 2253 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
8de52778 | 2254 | sb->s_max_links = UDF_MAX_LINKS; |
1da177e4 LT |
2255 | return 0; |
2256 | ||
28de7948 | 2257 | error_out: |
0d454e4a | 2258 | iput(sbi->s_vat_inode); |
fdf2657b | 2259 | parse_options_failure: |
1da177e4 LT |
2260 | #ifdef CONFIG_UDF_NLS |
2261 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2262 | unload_nls(sbi->s_nls_map); |
1da177e4 | 2263 | #endif |
9181f8bf | 2264 | if (lvid_open) |
1da177e4 | 2265 | udf_close_lvid(sb); |
6c79e987 | 2266 | brelse(sbi->s_lvid_bh); |
bff943af | 2267 | udf_sb_free_partitions(sb); |
1da177e4 LT |
2268 | kfree(sbi); |
2269 | sb->s_fs_info = NULL; | |
28de7948 | 2270 | |
d759bfa4 | 2271 | return ret; |
1da177e4 LT |
2272 | } |
2273 | ||
8076c363 JP |
2274 | void _udf_err(struct super_block *sb, const char *function, |
2275 | const char *fmt, ...) | |
1da177e4 | 2276 | { |
c2bff36c | 2277 | struct va_format vaf; |
1da177e4 LT |
2278 | va_list args; |
2279 | ||
1da177e4 | 2280 | va_start(args, fmt); |
c2bff36c JP |
2281 | |
2282 | vaf.fmt = fmt; | |
2283 | vaf.va = &args; | |
2284 | ||
2285 | pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2286 | ||
1da177e4 | 2287 | va_end(args); |
1da177e4 LT |
2288 | } |
2289 | ||
a40ecd7b JP |
2290 | void _udf_warn(struct super_block *sb, const char *function, |
2291 | const char *fmt, ...) | |
1da177e4 | 2292 | { |
c2bff36c | 2293 | struct va_format vaf; |
1da177e4 LT |
2294 | va_list args; |
2295 | ||
cb00ea35 | 2296 | va_start(args, fmt); |
c2bff36c JP |
2297 | |
2298 | vaf.fmt = fmt; | |
2299 | vaf.va = &args; | |
2300 | ||
2301 | pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2302 | ||
1da177e4 | 2303 | va_end(args); |
1da177e4 LT |
2304 | } |
2305 | ||
cb00ea35 | 2306 | static void udf_put_super(struct super_block *sb) |
1da177e4 | 2307 | { |
6c79e987 | 2308 | struct udf_sb_info *sbi; |
1da177e4 | 2309 | |
6c79e987 | 2310 | sbi = UDF_SB(sb); |
6cfd0148 | 2311 | |
0d454e4a | 2312 | iput(sbi->s_vat_inode); |
1da177e4 LT |
2313 | #ifdef CONFIG_UDF_NLS |
2314 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2315 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2316 | #endif |
2317 | if (!(sb->s_flags & MS_RDONLY)) | |
2318 | udf_close_lvid(sb); | |
6c79e987 | 2319 | brelse(sbi->s_lvid_bh); |
bff943af | 2320 | udf_sb_free_partitions(sb); |
bbe48dd8 | 2321 | mutex_destroy(&sbi->s_alloc_mutex); |
1da177e4 LT |
2322 | kfree(sb->s_fs_info); |
2323 | sb->s_fs_info = NULL; | |
2324 | } | |
2325 | ||
146bca72 JK |
2326 | static int udf_sync_fs(struct super_block *sb, int wait) |
2327 | { | |
2328 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2329 | ||
2330 | mutex_lock(&sbi->s_alloc_mutex); | |
2331 | if (sbi->s_lvid_dirty) { | |
2332 | /* | |
2333 | * Blockdevice will be synced later so we don't have to submit | |
2334 | * the buffer for IO | |
2335 | */ | |
2336 | mark_buffer_dirty(sbi->s_lvid_bh); | |
146bca72 JK |
2337 | sbi->s_lvid_dirty = 0; |
2338 | } | |
2339 | mutex_unlock(&sbi->s_alloc_mutex); | |
2340 | ||
2341 | return 0; | |
2342 | } | |
2343 | ||
cb00ea35 | 2344 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2345 | { |
726c3342 | 2346 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
2347 | struct udf_sb_info *sbi = UDF_SB(sb); |
2348 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
557f5a14 | 2349 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
6c79e987 | 2350 | |
69d75671 | 2351 | lvidiu = udf_sb_lvidiu(sb); |
1da177e4 LT |
2352 | buf->f_type = UDF_SUPER_MAGIC; |
2353 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 2354 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
2355 | buf->f_bfree = udf_count_free(sb); |
2356 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
2357 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
2358 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
2359 | + buf->f_bfree; | |
1da177e4 | 2360 | buf->f_ffree = buf->f_bfree; |
cb00ea35 | 2361 | buf->f_namelen = UDF_NAME_LEN - 2; |
557f5a14 CL |
2362 | buf->f_fsid.val[0] = (u32)id; |
2363 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
2364 | |
2365 | return 0; | |
2366 | } | |
2367 | ||
4b11111a MS |
2368 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
2369 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
2370 | { |
2371 | struct buffer_head *bh = NULL; | |
2372 | unsigned int accum = 0; | |
2373 | int index; | |
2374 | int block = 0, newblock; | |
5ca4e4be | 2375 | struct kernel_lb_addr loc; |
1da177e4 | 2376 | uint32_t bytes; |
1da177e4 LT |
2377 | uint8_t *ptr; |
2378 | uint16_t ident; | |
2379 | struct spaceBitmapDesc *bm; | |
2380 | ||
1da177e4 | 2381 | loc.logicalBlockNum = bitmap->s_extPosition; |
6c79e987 | 2382 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
97e961fd | 2383 | bh = udf_read_ptagged(sb, &loc, 0, &ident); |
1da177e4 | 2384 | |
cb00ea35 | 2385 | if (!bh) { |
78ace70c | 2386 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 | 2387 | goto out; |
cb00ea35 | 2388 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 2389 | brelse(bh); |
78ace70c | 2390 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 LT |
2391 | goto out; |
2392 | } | |
2393 | ||
2394 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2395 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
2396 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
2397 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 2398 | |
cb00ea35 | 2399 | while (bytes > 0) { |
01b954a3 MS |
2400 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
2401 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2402 | cur_bytes * 8); | |
2403 | bytes -= cur_bytes; | |
cb00ea35 | 2404 | if (bytes) { |
3bf25cb4 | 2405 | brelse(bh); |
97e961fd | 2406 | newblock = udf_get_lb_pblock(sb, &loc, ++block); |
1da177e4 | 2407 | bh = udf_tread(sb, newblock); |
cb00ea35 | 2408 | if (!bh) { |
1da177e4 LT |
2409 | udf_debug("read failed\n"); |
2410 | goto out; | |
2411 | } | |
2412 | index = 0; | |
28de7948 | 2413 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2414 | } |
2415 | } | |
3bf25cb4 | 2416 | brelse(bh); |
28de7948 | 2417 | out: |
1da177e4 LT |
2418 | return accum; |
2419 | } | |
2420 | ||
4b11111a MS |
2421 | static unsigned int udf_count_free_table(struct super_block *sb, |
2422 | struct inode *table) | |
1da177e4 LT |
2423 | { |
2424 | unsigned int accum = 0; | |
ff116fc8 | 2425 | uint32_t elen; |
5ca4e4be | 2426 | struct kernel_lb_addr eloc; |
1da177e4 | 2427 | int8_t etype; |
ff116fc8 | 2428 | struct extent_position epos; |
1da177e4 | 2429 | |
d1668fe3 | 2430 | mutex_lock(&UDF_SB(sb)->s_alloc_mutex); |
c0b34438 | 2431 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2432 | epos.offset = sizeof(struct unallocSpaceEntry); |
2433 | epos.bh = NULL; | |
1da177e4 | 2434 | |
3a71fc5d | 2435 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2436 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2437 | |
3bf25cb4 | 2438 | brelse(epos.bh); |
d1668fe3 | 2439 | mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); |
1da177e4 LT |
2440 | |
2441 | return accum; | |
2442 | } | |
cb00ea35 CG |
2443 | |
2444 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2445 | { |
2446 | unsigned int accum = 0; | |
6c79e987 MS |
2447 | struct udf_sb_info *sbi; |
2448 | struct udf_part_map *map; | |
1da177e4 | 2449 | |
6c79e987 MS |
2450 | sbi = UDF_SB(sb); |
2451 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2452 | struct logicalVolIntegrityDesc *lvid = |
2453 | (struct logicalVolIntegrityDesc *) | |
2454 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2455 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2456 | accum = le32_to_cpu( |
2457 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2458 | if (accum == 0xFFFFFFFF) |
2459 | accum = 0; | |
2460 | } | |
2461 | } | |
2462 | ||
2463 | if (accum) | |
2464 | return accum; | |
2465 | ||
6c79e987 MS |
2466 | map = &sbi->s_partmaps[sbi->s_partition]; |
2467 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2468 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2469 | map->s_uspace.s_bitmap); |
1da177e4 | 2470 | } |
6c79e987 | 2471 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
28de7948 | 2472 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2473 | map->s_fspace.s_bitmap); |
1da177e4 LT |
2474 | } |
2475 | if (accum) | |
2476 | return accum; | |
2477 | ||
6c79e987 | 2478 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2479 | accum += udf_count_free_table(sb, |
6c79e987 | 2480 | map->s_uspace.s_table); |
1da177e4 | 2481 | } |
6c79e987 | 2482 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
28de7948 | 2483 | accum += udf_count_free_table(sb, |
6c79e987 | 2484 | map->s_fspace.s_table); |
1da177e4 LT |
2485 | } |
2486 | ||
2487 | return accum; | |
2488 | } |