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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * super.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Super block routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
7 | * DESCRIPTION | |
8 | * OSTA-UDF(tm) = Optical Storage Technology Association | |
9 | * Universal Disk Format. | |
10 | * | |
11 | * This code is based on version 2.00 of the UDF specification, | |
12 | * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346]. | |
13 | * http://www.osta.org/ | |
14 | * http://www.ecma.ch/ | |
15 | * http://www.iso.org/ | |
16 | * | |
1da177e4 LT |
17 | * COPYRIGHT |
18 | * This file is distributed under the terms of the GNU General Public | |
19 | * License (GPL). Copies of the GPL can be obtained from: | |
20 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
21 | * Each contributing author retains all rights to their own work. | |
22 | * | |
23 | * (C) 1998 Dave Boynton | |
24 | * (C) 1998-2004 Ben Fennema | |
25 | * (C) 2000 Stelias Computing Inc | |
26 | * | |
27 | * HISTORY | |
28 | * | |
29 | * 09/24/98 dgb changed to allow compiling outside of kernel, and | |
30 | * added some debugging. | |
31 | * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34 | |
32 | * 10/16/98 attempting some multi-session support | |
33 | * 10/17/98 added freespace count for "df" | |
34 | * 11/11/98 gr added novrs option | |
35 | * 11/26/98 dgb added fileset,anchor mount options | |
3a71fc5d MS |
36 | * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced |
37 | * vol descs. rewrote option handling based on isofs | |
1da177e4 LT |
38 | * 12/20/98 find the free space bitmap (if it exists) |
39 | */ | |
40 | ||
cb00ea35 | 41 | #include "udfdecl.h" |
1da177e4 | 42 | |
1da177e4 LT |
43 | #include <linux/blkdev.h> |
44 | #include <linux/slab.h> | |
45 | #include <linux/kernel.h> | |
46 | #include <linux/module.h> | |
47 | #include <linux/parser.h> | |
48 | #include <linux/stat.h> | |
49 | #include <linux/cdrom.h> | |
50 | #include <linux/nls.h> | |
1da177e4 LT |
51 | #include <linux/vfs.h> |
52 | #include <linux/vmalloc.h> | |
dc5d39be | 53 | #include <linux/errno.h> |
6da80894 MS |
54 | #include <linux/mount.h> |
55 | #include <linux/seq_file.h> | |
01b954a3 | 56 | #include <linux/bitmap.h> |
f845fced | 57 | #include <linux/crc-itu-t.h> |
1df2ae31 | 58 | #include <linux/log2.h> |
1da177e4 LT |
59 | #include <asm/byteorder.h> |
60 | ||
1da177e4 LT |
61 | #include "udf_sb.h" |
62 | #include "udf_i.h" | |
63 | ||
64 | #include <linux/init.h> | |
e973606c | 65 | #include <linux/uaccess.h> |
1da177e4 | 66 | |
4b8d4252 JK |
67 | enum { |
68 | VDS_POS_PRIMARY_VOL_DESC, | |
69 | VDS_POS_UNALLOC_SPACE_DESC, | |
70 | VDS_POS_LOGICAL_VOL_DESC, | |
4b8d4252 | 71 | VDS_POS_IMP_USE_VOL_DESC, |
4b8d4252 JK |
72 | VDS_POS_LENGTH |
73 | }; | |
1da177e4 | 74 | |
44499602 PF |
75 | #define VSD_FIRST_SECTOR_OFFSET 32768 |
76 | #define VSD_MAX_SECTOR_OFFSET 0x800000 | |
77 | ||
a47241cd AT |
78 | /* |
79 | * Maximum number of Terminating Descriptor / Logical Volume Integrity | |
80 | * Descriptor redirections. The chosen numbers are arbitrary - just that we | |
81 | * hopefully don't limit any real use of rewritten inode on write-once media | |
82 | * but avoid looping for too long on corrupted media. | |
83 | */ | |
84 | #define UDF_MAX_TD_NESTING 64 | |
85 | #define UDF_MAX_LVID_NESTING 1000 | |
86 | ||
8de52778 AV |
87 | enum { UDF_MAX_LINKS = 0xffff }; |
88 | ||
1da177e4 LT |
89 | /* These are the "meat" - everything else is stuffing */ |
90 | static int udf_fill_super(struct super_block *, void *, int); | |
91 | static void udf_put_super(struct super_block *); | |
146bca72 | 92 | static int udf_sync_fs(struct super_block *, int); |
1da177e4 | 93 | static int udf_remount_fs(struct super_block *, int *, char *); |
5ca4e4be | 94 | static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); |
5ca4e4be PE |
95 | static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, |
96 | struct kernel_lb_addr *); | |
cb00ea35 | 97 | static void udf_load_fileset(struct super_block *, struct buffer_head *, |
5ca4e4be | 98 | struct kernel_lb_addr *); |
1da177e4 LT |
99 | static void udf_open_lvid(struct super_block *); |
100 | static void udf_close_lvid(struct super_block *); | |
101 | static unsigned int udf_count_free(struct super_block *); | |
726c3342 | 102 | static int udf_statfs(struct dentry *, struct kstatfs *); |
34c80b1d | 103 | static int udf_show_options(struct seq_file *, struct dentry *); |
1da177e4 | 104 | |
69d75671 | 105 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb) |
6c79e987 | 106 | { |
69d75671 JK |
107 | struct logicalVolIntegrityDesc *lvid; |
108 | unsigned int partnum; | |
109 | unsigned int offset; | |
110 | ||
111 | if (!UDF_SB(sb)->s_lvid_bh) | |
112 | return NULL; | |
113 | lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data; | |
114 | partnum = le32_to_cpu(lvid->numOfPartitions); | |
115 | if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) - | |
116 | offsetof(struct logicalVolIntegrityDesc, impUse)) / | |
117 | (2 * sizeof(uint32_t)) < partnum) { | |
118 | udf_err(sb, "Logical volume integrity descriptor corrupted " | |
119 | "(numOfPartitions = %u)!\n", partnum); | |
120 | return NULL; | |
121 | } | |
122 | /* The offset is to skip freeSpaceTable and sizeTable arrays */ | |
123 | offset = partnum * 2 * sizeof(uint32_t); | |
6c79e987 MS |
124 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
125 | } | |
126 | ||
1da177e4 | 127 | /* UDF filesystem type */ |
152a0836 AV |
128 | static struct dentry *udf_mount(struct file_system_type *fs_type, |
129 | int flags, const char *dev_name, void *data) | |
1da177e4 | 130 | { |
152a0836 | 131 | return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super); |
1da177e4 LT |
132 | } |
133 | ||
134 | static struct file_system_type udf_fstype = { | |
28de7948 CG |
135 | .owner = THIS_MODULE, |
136 | .name = "udf", | |
152a0836 | 137 | .mount = udf_mount, |
28de7948 CG |
138 | .kill_sb = kill_block_super, |
139 | .fs_flags = FS_REQUIRES_DEV, | |
1da177e4 | 140 | }; |
3e64fe5b | 141 | MODULE_ALIAS_FS("udf"); |
1da177e4 | 142 | |
cb00ea35 | 143 | static struct kmem_cache *udf_inode_cachep; |
1da177e4 LT |
144 | |
145 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
146 | { | |
147 | struct udf_inode_info *ei; | |
3a71fc5d | 148 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
149 | if (!ei) |
150 | return NULL; | |
95f8797f DB |
151 | |
152 | ei->i_unique = 0; | |
153 | ei->i_lenExtents = 0; | |
154 | ei->i_next_alloc_block = 0; | |
155 | ei->i_next_alloc_goal = 0; | |
156 | ei->i_strat4096 = 0; | |
4d0fb621 | 157 | init_rwsem(&ei->i_data_sem); |
99600051 NJ |
158 | ei->cached_extent.lstart = -1; |
159 | spin_lock_init(&ei->i_extent_cache_lock); | |
95f8797f | 160 | |
1da177e4 LT |
161 | return &ei->vfs_inode; |
162 | } | |
163 | ||
fa0d7e3d | 164 | static void udf_i_callback(struct rcu_head *head) |
1da177e4 | 165 | { |
fa0d7e3d | 166 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
167 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); |
168 | } | |
169 | ||
fa0d7e3d NP |
170 | static void udf_destroy_inode(struct inode *inode) |
171 | { | |
172 | call_rcu(&inode->i_rcu, udf_i_callback); | |
173 | } | |
174 | ||
51cc5068 | 175 | static void init_once(void *foo) |
1da177e4 | 176 | { |
cb00ea35 | 177 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 178 | |
a35afb83 CL |
179 | ei->i_ext.i_data = NULL; |
180 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
181 | } |
182 | ||
53ea18de | 183 | static int __init init_inodecache(void) |
1da177e4 LT |
184 | { |
185 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
186 | sizeof(struct udf_inode_info), | |
cb00ea35 | 187 | 0, (SLAB_RECLAIM_ACCOUNT | |
5d097056 VD |
188 | SLAB_MEM_SPREAD | |
189 | SLAB_ACCOUNT), | |
20c2df83 | 190 | init_once); |
28de7948 | 191 | if (!udf_inode_cachep) |
1da177e4 LT |
192 | return -ENOMEM; |
193 | return 0; | |
194 | } | |
195 | ||
196 | static void destroy_inodecache(void) | |
197 | { | |
8c0a8537 KS |
198 | /* |
199 | * Make sure all delayed rcu free inodes are flushed before we | |
200 | * destroy cache. | |
201 | */ | |
202 | rcu_barrier(); | |
1a1d92c1 | 203 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
204 | } |
205 | ||
206 | /* Superblock operations */ | |
ee9b6d61 | 207 | static const struct super_operations udf_sb_ops = { |
28de7948 CG |
208 | .alloc_inode = udf_alloc_inode, |
209 | .destroy_inode = udf_destroy_inode, | |
210 | .write_inode = udf_write_inode, | |
3aac2b62 | 211 | .evict_inode = udf_evict_inode, |
28de7948 | 212 | .put_super = udf_put_super, |
146bca72 | 213 | .sync_fs = udf_sync_fs, |
28de7948 CG |
214 | .statfs = udf_statfs, |
215 | .remount_fs = udf_remount_fs, | |
6da80894 | 216 | .show_options = udf_show_options, |
1da177e4 LT |
217 | }; |
218 | ||
cb00ea35 | 219 | struct udf_options { |
1da177e4 LT |
220 | unsigned char novrs; |
221 | unsigned int blocksize; | |
222 | unsigned int session; | |
223 | unsigned int lastblock; | |
224 | unsigned int anchor; | |
1da177e4 | 225 | unsigned int flags; |
faa17292 | 226 | umode_t umask; |
c2ba138a EB |
227 | kgid_t gid; |
228 | kuid_t uid; | |
faa17292 AV |
229 | umode_t fmode; |
230 | umode_t dmode; | |
1da177e4 LT |
231 | struct nls_table *nls_map; |
232 | }; | |
233 | ||
234 | static int __init init_udf_fs(void) | |
235 | { | |
236 | int err; | |
28de7948 | 237 | |
1da177e4 LT |
238 | err = init_inodecache(); |
239 | if (err) | |
240 | goto out1; | |
241 | err = register_filesystem(&udf_fstype); | |
242 | if (err) | |
243 | goto out; | |
28de7948 | 244 | |
1da177e4 | 245 | return 0; |
28de7948 CG |
246 | |
247 | out: | |
1da177e4 | 248 | destroy_inodecache(); |
28de7948 CG |
249 | |
250 | out1: | |
1da177e4 LT |
251 | return err; |
252 | } | |
253 | ||
254 | static void __exit exit_udf_fs(void) | |
255 | { | |
256 | unregister_filesystem(&udf_fstype); | |
257 | destroy_inodecache(); | |
258 | } | |
259 | ||
dc5d39be MS |
260 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
261 | { | |
262 | struct udf_sb_info *sbi = UDF_SB(sb); | |
263 | ||
033c9da0 | 264 | sbi->s_partmaps = kcalloc(count, sizeof(*sbi->s_partmaps), GFP_KERNEL); |
dc5d39be | 265 | if (!sbi->s_partmaps) { |
dc5d39be MS |
266 | sbi->s_partitions = 0; |
267 | return -ENOMEM; | |
268 | } | |
269 | ||
270 | sbi->s_partitions = count; | |
271 | return 0; | |
272 | } | |
273 | ||
bff943af JK |
274 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
275 | { | |
276 | int i; | |
277 | int nr_groups = bitmap->s_nr_groups; | |
bff943af JK |
278 | |
279 | for (i = 0; i < nr_groups; i++) | |
280 | if (bitmap->s_block_bitmap[i]) | |
281 | brelse(bitmap->s_block_bitmap[i]); | |
282 | ||
1d5cfdb0 | 283 | kvfree(bitmap); |
bff943af JK |
284 | } |
285 | ||
286 | static void udf_free_partition(struct udf_part_map *map) | |
287 | { | |
288 | int i; | |
289 | struct udf_meta_data *mdata; | |
290 | ||
291 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
292 | iput(map->s_uspace.s_table); | |
293 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
294 | iput(map->s_fspace.s_table); | |
295 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
296 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
297 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) | |
298 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); | |
299 | if (map->s_partition_type == UDF_SPARABLE_MAP15) | |
300 | for (i = 0; i < 4; i++) | |
301 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
302 | else if (map->s_partition_type == UDF_METADATA_MAP25) { | |
303 | mdata = &map->s_type_specific.s_metadata; | |
304 | iput(mdata->s_metadata_fe); | |
305 | mdata->s_metadata_fe = NULL; | |
306 | ||
307 | iput(mdata->s_mirror_fe); | |
308 | mdata->s_mirror_fe = NULL; | |
309 | ||
310 | iput(mdata->s_bitmap_fe); | |
311 | mdata->s_bitmap_fe = NULL; | |
312 | } | |
313 | } | |
314 | ||
315 | static void udf_sb_free_partitions(struct super_block *sb) | |
316 | { | |
317 | struct udf_sb_info *sbi = UDF_SB(sb); | |
318 | int i; | |
ba2eb866 ME |
319 | |
320 | if (!sbi->s_partmaps) | |
1b1baff6 | 321 | return; |
bff943af JK |
322 | for (i = 0; i < sbi->s_partitions; i++) |
323 | udf_free_partition(&sbi->s_partmaps[i]); | |
324 | kfree(sbi->s_partmaps); | |
325 | sbi->s_partmaps = NULL; | |
326 | } | |
327 | ||
34c80b1d | 328 | static int udf_show_options(struct seq_file *seq, struct dentry *root) |
6da80894 | 329 | { |
34c80b1d | 330 | struct super_block *sb = root->d_sb; |
6da80894 MS |
331 | struct udf_sb_info *sbi = UDF_SB(sb); |
332 | ||
333 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
334 | seq_puts(seq, ",nostrict"); | |
1197e4df | 335 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) |
6da80894 MS |
336 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); |
337 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
338 | seq_puts(seq, ",unhide"); | |
339 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
340 | seq_puts(seq, ",undelete"); | |
341 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
342 | seq_puts(seq, ",noadinicb"); | |
343 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
344 | seq_puts(seq, ",shortad"); | |
345 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
346 | seq_puts(seq, ",uid=forget"); | |
6da80894 MS |
347 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) |
348 | seq_puts(seq, ",gid=forget"); | |
6da80894 | 349 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) |
c2ba138a | 350 | seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid)); |
6da80894 | 351 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) |
c2ba138a | 352 | seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid)); |
6da80894 | 353 | if (sbi->s_umask != 0) |
faa17292 | 354 | seq_printf(seq, ",umask=%ho", sbi->s_umask); |
87bc730c | 355 | if (sbi->s_fmode != UDF_INVALID_MODE) |
faa17292 | 356 | seq_printf(seq, ",mode=%ho", sbi->s_fmode); |
87bc730c | 357 | if (sbi->s_dmode != UDF_INVALID_MODE) |
faa17292 | 358 | seq_printf(seq, ",dmode=%ho", sbi->s_dmode); |
6da80894 | 359 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) |
fcbf7637 | 360 | seq_printf(seq, ",session=%d", sbi->s_session); |
6da80894 MS |
361 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) |
362 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
40346005 JK |
363 | if (sbi->s_anchor != 0) |
364 | seq_printf(seq, ",anchor=%u", sbi->s_anchor); | |
6da80894 MS |
365 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) |
366 | seq_puts(seq, ",utf8"); | |
367 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
368 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
1da177e4 LT |
373 | /* |
374 | * udf_parse_options | |
375 | * | |
376 | * PURPOSE | |
377 | * Parse mount options. | |
378 | * | |
379 | * DESCRIPTION | |
380 | * The following mount options are supported: | |
381 | * | |
382 | * gid= Set the default group. | |
383 | * umask= Set the default umask. | |
7ac9bcd5 MS |
384 | * mode= Set the default file permissions. |
385 | * dmode= Set the default directory permissions. | |
1da177e4 LT |
386 | * uid= Set the default user. |
387 | * bs= Set the block size. | |
388 | * unhide Show otherwise hidden files. | |
389 | * undelete Show deleted files in lists. | |
390 | * adinicb Embed data in the inode (default) | |
391 | * noadinicb Don't embed data in the inode | |
392 | * shortad Use short ad's | |
393 | * longad Use long ad's (default) | |
394 | * nostrict Unset strict conformance | |
395 | * iocharset= Set the NLS character set | |
396 | * | |
397 | * The remaining are for debugging and disaster recovery: | |
398 | * | |
28de7948 | 399 | * novrs Skip volume sequence recognition |
1da177e4 LT |
400 | * |
401 | * The following expect a offset from 0. | |
402 | * | |
403 | * session= Set the CDROM session (default= last session) | |
404 | * anchor= Override standard anchor location. (default= 256) | |
405 | * volume= Override the VolumeDesc location. (unused) | |
406 | * partition= Override the PartitionDesc location. (unused) | |
407 | * lastblock= Set the last block of the filesystem/ | |
408 | * | |
409 | * The following expect a offset from the partition root. | |
410 | * | |
411 | * fileset= Override the fileset block location. (unused) | |
412 | * rootdir= Override the root directory location. (unused) | |
413 | * WARNING: overriding the rootdir to a non-directory may | |
414 | * yield highly unpredictable results. | |
415 | * | |
416 | * PRE-CONDITIONS | |
417 | * options Pointer to mount options string. | |
418 | * uopts Pointer to mount options variable. | |
419 | * | |
420 | * POST-CONDITIONS | |
421 | * <return> 1 Mount options parsed okay. | |
422 | * <return> 0 Error parsing mount options. | |
423 | * | |
424 | * HISTORY | |
425 | * July 1, 1997 - Andrew E. Mileski | |
426 | * Written, tested, and released. | |
427 | */ | |
28de7948 | 428 | |
1da177e4 LT |
429 | enum { |
430 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
431 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
432 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
433 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
434 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
7ac9bcd5 MS |
435 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, |
436 | Opt_fmode, Opt_dmode | |
1da177e4 LT |
437 | }; |
438 | ||
a447c093 | 439 | static const match_table_t tokens = { |
28de7948 CG |
440 | {Opt_novrs, "novrs"}, |
441 | {Opt_nostrict, "nostrict"}, | |
442 | {Opt_bs, "bs=%u"}, | |
443 | {Opt_unhide, "unhide"}, | |
444 | {Opt_undelete, "undelete"}, | |
445 | {Opt_noadinicb, "noadinicb"}, | |
446 | {Opt_adinicb, "adinicb"}, | |
447 | {Opt_shortad, "shortad"}, | |
448 | {Opt_longad, "longad"}, | |
449 | {Opt_uforget, "uid=forget"}, | |
450 | {Opt_uignore, "uid=ignore"}, | |
451 | {Opt_gforget, "gid=forget"}, | |
452 | {Opt_gignore, "gid=ignore"}, | |
453 | {Opt_gid, "gid=%u"}, | |
454 | {Opt_uid, "uid=%u"}, | |
455 | {Opt_umask, "umask=%o"}, | |
456 | {Opt_session, "session=%u"}, | |
457 | {Opt_lastblock, "lastblock=%u"}, | |
458 | {Opt_anchor, "anchor=%u"}, | |
459 | {Opt_volume, "volume=%u"}, | |
460 | {Opt_partition, "partition=%u"}, | |
461 | {Opt_fileset, "fileset=%u"}, | |
462 | {Opt_rootdir, "rootdir=%u"}, | |
463 | {Opt_utf8, "utf8"}, | |
464 | {Opt_iocharset, "iocharset=%s"}, | |
7ac9bcd5 MS |
465 | {Opt_fmode, "mode=%o"}, |
466 | {Opt_dmode, "dmode=%o"}, | |
28de7948 | 467 | {Opt_err, NULL} |
1da177e4 LT |
468 | }; |
469 | ||
6da80894 MS |
470 | static int udf_parse_options(char *options, struct udf_options *uopt, |
471 | bool remount) | |
1da177e4 LT |
472 | { |
473 | char *p; | |
474 | int option; | |
475 | ||
476 | uopt->novrs = 0; | |
1da177e4 LT |
477 | uopt->session = 0xFFFFFFFF; |
478 | uopt->lastblock = 0; | |
479 | uopt->anchor = 0; | |
1da177e4 LT |
480 | |
481 | if (!options) | |
482 | return 1; | |
483 | ||
cb00ea35 | 484 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
485 | substring_t args[MAX_OPT_ARGS]; |
486 | int token; | |
8c6915ae | 487 | unsigned n; |
1da177e4 LT |
488 | if (!*p) |
489 | continue; | |
490 | ||
491 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
492 | switch (token) { |
493 | case Opt_novrs: | |
494 | uopt->novrs = 1; | |
4136801a | 495 | break; |
cb00ea35 CG |
496 | case Opt_bs: |
497 | if (match_int(&args[0], &option)) | |
498 | return 0; | |
8c6915ae FF |
499 | n = option; |
500 | if (n != 512 && n != 1024 && n != 2048 && n != 4096) | |
501 | return 0; | |
502 | uopt->blocksize = n; | |
1197e4df | 503 | uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); |
cb00ea35 CG |
504 | break; |
505 | case Opt_unhide: | |
506 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
507 | break; | |
508 | case Opt_undelete: | |
509 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
510 | break; | |
511 | case Opt_noadinicb: | |
512 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
513 | break; | |
514 | case Opt_adinicb: | |
515 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
516 | break; | |
517 | case Opt_shortad: | |
518 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
519 | break; | |
520 | case Opt_longad: | |
521 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
522 | break; | |
523 | case Opt_gid: | |
524 | if (match_int(args, &option)) | |
525 | return 0; | |
c2ba138a EB |
526 | uopt->gid = make_kgid(current_user_ns(), option); |
527 | if (!gid_valid(uopt->gid)) | |
528 | return 0; | |
ca76d2d8 | 529 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
530 | break; |
531 | case Opt_uid: | |
532 | if (match_int(args, &option)) | |
533 | return 0; | |
c2ba138a EB |
534 | uopt->uid = make_kuid(current_user_ns(), option); |
535 | if (!uid_valid(uopt->uid)) | |
536 | return 0; | |
ca76d2d8 | 537 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
538 | break; |
539 | case Opt_umask: | |
540 | if (match_octal(args, &option)) | |
541 | return 0; | |
542 | uopt->umask = option; | |
543 | break; | |
544 | case Opt_nostrict: | |
545 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
546 | break; | |
547 | case Opt_session: | |
548 | if (match_int(args, &option)) | |
549 | return 0; | |
550 | uopt->session = option; | |
6da80894 MS |
551 | if (!remount) |
552 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
553 | break; |
554 | case Opt_lastblock: | |
555 | if (match_int(args, &option)) | |
556 | return 0; | |
557 | uopt->lastblock = option; | |
6da80894 MS |
558 | if (!remount) |
559 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
560 | break; |
561 | case Opt_anchor: | |
562 | if (match_int(args, &option)) | |
563 | return 0; | |
564 | uopt->anchor = option; | |
565 | break; | |
566 | case Opt_volume: | |
cb00ea35 | 567 | case Opt_partition: |
cb00ea35 | 568 | case Opt_fileset: |
cb00ea35 | 569 | case Opt_rootdir: |
f0c4a817 | 570 | /* Ignored (never implemented properly) */ |
cb00ea35 CG |
571 | break; |
572 | case Opt_utf8: | |
573 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
574 | break; | |
cb00ea35 | 575 | case Opt_iocharset: |
785dffe1 CX |
576 | if (!remount) { |
577 | if (uopt->nls_map) | |
578 | unload_nls(uopt->nls_map); | |
579 | uopt->nls_map = load_nls(args[0].from); | |
580 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
581 | } | |
cb00ea35 | 582 | break; |
cb00ea35 CG |
583 | case Opt_uforget: |
584 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
585 | break; | |
70260e44 | 586 | case Opt_uignore: |
cb00ea35 | 587 | case Opt_gignore: |
70260e44 | 588 | /* These options are superseeded by uid=<number> */ |
cb00ea35 CG |
589 | break; |
590 | case Opt_gforget: | |
591 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
592 | break; | |
7ac9bcd5 MS |
593 | case Opt_fmode: |
594 | if (match_octal(args, &option)) | |
595 | return 0; | |
596 | uopt->fmode = option & 0777; | |
597 | break; | |
598 | case Opt_dmode: | |
599 | if (match_octal(args, &option)) | |
600 | return 0; | |
601 | uopt->dmode = option & 0777; | |
602 | break; | |
cb00ea35 | 603 | default: |
78ace70c | 604 | pr_err("bad mount option \"%s\" or missing value\n", p); |
1da177e4 LT |
605 | return 0; |
606 | } | |
607 | } | |
608 | return 1; | |
609 | } | |
610 | ||
cb00ea35 | 611 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
612 | { |
613 | struct udf_options uopt; | |
6c79e987 | 614 | struct udf_sb_info *sbi = UDF_SB(sb); |
c79d967d | 615 | int error = 0; |
69d75671 | 616 | struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb); |
1da177e4 | 617 | |
02b9984d | 618 | sync_filesystem(sb); |
69d75671 JK |
619 | if (lvidiu) { |
620 | int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
1751e8a6 | 621 | if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & SB_RDONLY)) |
e729eac6 JK |
622 | return -EACCES; |
623 | } | |
624 | ||
6c79e987 MS |
625 | uopt.flags = sbi->s_flags; |
626 | uopt.uid = sbi->s_uid; | |
627 | uopt.gid = sbi->s_gid; | |
628 | uopt.umask = sbi->s_umask; | |
7ac9bcd5 MS |
629 | uopt.fmode = sbi->s_fmode; |
630 | uopt.dmode = sbi->s_dmode; | |
785dffe1 | 631 | uopt.nls_map = NULL; |
1da177e4 | 632 | |
6da80894 | 633 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
634 | return -EINVAL; |
635 | ||
c03cad24 | 636 | write_lock(&sbi->s_cred_lock); |
6c79e987 MS |
637 | sbi->s_flags = uopt.flags; |
638 | sbi->s_uid = uopt.uid; | |
639 | sbi->s_gid = uopt.gid; | |
640 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
641 | sbi->s_fmode = uopt.fmode; |
642 | sbi->s_dmode = uopt.dmode; | |
c03cad24 | 643 | write_unlock(&sbi->s_cred_lock); |
1da177e4 | 644 | |
1751e8a6 | 645 | if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb)) |
c79d967d CH |
646 | goto out_unlock; |
647 | ||
1751e8a6 | 648 | if (*flags & SB_RDONLY) |
1da177e4 | 649 | udf_close_lvid(sb); |
36350462 | 650 | else |
1da177e4 LT |
651 | udf_open_lvid(sb); |
652 | ||
c79d967d | 653 | out_unlock: |
c79d967d | 654 | return error; |
1da177e4 LT |
655 | } |
656 | ||
40346005 JK |
657 | /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ |
658 | /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
659 | static loff_t udf_check_vsd(struct super_block *sb) | |
1da177e4 LT |
660 | { |
661 | struct volStructDesc *vsd = NULL; | |
44499602 | 662 | loff_t sector = VSD_FIRST_SECTOR_OFFSET; |
1da177e4 LT |
663 | int sectorsize; |
664 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
665 | int nsr02 = 0; |
666 | int nsr03 = 0; | |
6c79e987 | 667 | struct udf_sb_info *sbi; |
1da177e4 | 668 | |
6c79e987 | 669 | sbi = UDF_SB(sb); |
1da177e4 LT |
670 | if (sb->s_blocksize < sizeof(struct volStructDesc)) |
671 | sectorsize = sizeof(struct volStructDesc); | |
672 | else | |
673 | sectorsize = sb->s_blocksize; | |
674 | ||
abdc0eb0 | 675 | sector += (((loff_t)sbi->s_session) << sb->s_blocksize_bits); |
1da177e4 | 676 | |
fcbf7637 | 677 | udf_debug("Starting at sector %u (%lu byte sectors)\n", |
706047a7 SM |
678 | (unsigned int)(sector >> sb->s_blocksize_bits), |
679 | sb->s_blocksize); | |
44499602 PF |
680 | /* Process the sequence (if applicable). The hard limit on the sector |
681 | * offset is arbitrary, hopefully large enough so that all valid UDF | |
682 | * filesystems will be recognised. There is no mention of an upper | |
683 | * bound to the size of the volume recognition area in the standard. | |
684 | * The limit will prevent the code to read all the sectors of a | |
685 | * specially crafted image (like a bluray disc full of CD001 sectors), | |
686 | * potentially causing minutes or even hours of uninterruptible I/O | |
687 | * activity. This actually happened with uninitialised SSD partitions | |
688 | * (all 0xFF) before the check for the limit and all valid IDs were | |
689 | * added */ | |
690 | for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET; | |
691 | sector += sectorsize) { | |
1da177e4 LT |
692 | /* Read a block */ |
693 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
694 | if (!bh) | |
695 | break; | |
696 | ||
697 | /* Look for ISO descriptors */ | |
698 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 699 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 700 | |
44499602 | 701 | if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
3a71fc5d | 702 | VSD_STD_ID_LEN)) { |
cb00ea35 CG |
703 | switch (vsd->structType) { |
704 | case 0: | |
705 | udf_debug("ISO9660 Boot Record found\n"); | |
706 | break; | |
707 | case 1: | |
a983f368 | 708 | udf_debug("ISO9660 Primary Volume Descriptor found\n"); |
cb00ea35 CG |
709 | break; |
710 | case 2: | |
a983f368 | 711 | udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); |
cb00ea35 CG |
712 | break; |
713 | case 3: | |
a983f368 | 714 | udf_debug("ISO9660 Volume Partition Descriptor found\n"); |
cb00ea35 CG |
715 | break; |
716 | case 255: | |
a983f368 | 717 | udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); |
cb00ea35 CG |
718 | break; |
719 | default: | |
720 | udf_debug("ISO9660 VRS (%u) found\n", | |
721 | vsd->structType); | |
722 | break; | |
1da177e4 | 723 | } |
3a71fc5d MS |
724 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
725 | VSD_STD_ID_LEN)) | |
726 | ; /* nothing */ | |
727 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
728 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 729 | brelse(bh); |
1da177e4 | 730 | break; |
3a71fc5d MS |
731 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
732 | VSD_STD_ID_LEN)) | |
1da177e4 | 733 | nsr02 = sector; |
3a71fc5d MS |
734 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
735 | VSD_STD_ID_LEN)) | |
1da177e4 | 736 | nsr03 = sector; |
44499602 PF |
737 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2, |
738 | VSD_STD_ID_LEN)) | |
739 | ; /* nothing */ | |
740 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02, | |
741 | VSD_STD_ID_LEN)) | |
742 | ; /* nothing */ | |
743 | else { | |
744 | /* invalid id : end of volume recognition area */ | |
745 | brelse(bh); | |
746 | break; | |
747 | } | |
3bf25cb4 | 748 | brelse(bh); |
1da177e4 LT |
749 | } |
750 | ||
751 | if (nsr03) | |
752 | return nsr03; | |
753 | else if (nsr02) | |
754 | return nsr02; | |
44499602 PF |
755 | else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) == |
756 | VSD_FIRST_SECTOR_OFFSET) | |
1da177e4 LT |
757 | return -1; |
758 | else | |
759 | return 0; | |
760 | } | |
761 | ||
3a71fc5d | 762 | static int udf_find_fileset(struct super_block *sb, |
5ca4e4be PE |
763 | struct kernel_lb_addr *fileset, |
764 | struct kernel_lb_addr *root) | |
1da177e4 LT |
765 | { |
766 | struct buffer_head *bh = NULL; | |
767 | long lastblock; | |
768 | uint16_t ident; | |
6c79e987 | 769 | struct udf_sb_info *sbi; |
1da177e4 LT |
770 | |
771 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 772 | fileset->partitionReferenceNum != 0xFFFF) { |
97e961fd | 773 | bh = udf_read_ptagged(sb, fileset, 0, &ident); |
1da177e4 | 774 | |
28de7948 | 775 | if (!bh) { |
1da177e4 | 776 | return 1; |
28de7948 | 777 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 778 | brelse(bh); |
1da177e4 LT |
779 | return 1; |
780 | } | |
cb00ea35 | 781 | |
1da177e4 LT |
782 | } |
783 | ||
6c79e987 | 784 | sbi = UDF_SB(sb); |
3a71fc5d MS |
785 | if (!bh) { |
786 | /* Search backwards through the partitions */ | |
5ca4e4be | 787 | struct kernel_lb_addr newfileset; |
1da177e4 | 788 | |
28de7948 | 789 | /* --> cvg: FIXME - is it reasonable? */ |
1da177e4 | 790 | return 1; |
cb00ea35 | 791 | |
6c79e987 | 792 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
cb00ea35 CG |
793 | (newfileset.partitionReferenceNum != 0xFFFF && |
794 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
795 | fileset->partitionReferenceNum == 0xFFFF); | |
796 | newfileset.partitionReferenceNum--) { | |
6c79e987 MS |
797 | lastblock = sbi->s_partmaps |
798 | [newfileset.partitionReferenceNum] | |
799 | .s_partition_len; | |
1da177e4 LT |
800 | newfileset.logicalBlockNum = 0; |
801 | ||
cb00ea35 | 802 | do { |
97e961fd | 803 | bh = udf_read_ptagged(sb, &newfileset, 0, |
3a71fc5d | 804 | &ident); |
cb00ea35 CG |
805 | if (!bh) { |
806 | newfileset.logicalBlockNum++; | |
1da177e4 LT |
807 | continue; |
808 | } | |
809 | ||
cb00ea35 CG |
810 | switch (ident) { |
811 | case TAG_IDENT_SBD: | |
28de7948 CG |
812 | { |
813 | struct spaceBitmapDesc *sp; | |
4b11111a MS |
814 | sp = (struct spaceBitmapDesc *) |
815 | bh->b_data; | |
28de7948 CG |
816 | newfileset.logicalBlockNum += 1 + |
817 | ((le32_to_cpu(sp->numOfBytes) + | |
4b11111a MS |
818 | sizeof(struct spaceBitmapDesc) |
819 | - 1) >> sb->s_blocksize_bits); | |
28de7948 CG |
820 | brelse(bh); |
821 | break; | |
822 | } | |
cb00ea35 | 823 | case TAG_IDENT_FSD: |
28de7948 CG |
824 | *fileset = newfileset; |
825 | break; | |
cb00ea35 | 826 | default: |
28de7948 CG |
827 | newfileset.logicalBlockNum++; |
828 | brelse(bh); | |
829 | bh = NULL; | |
830 | break; | |
1da177e4 | 831 | } |
28de7948 CG |
832 | } while (newfileset.logicalBlockNum < lastblock && |
833 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
834 | fileset->partitionReferenceNum == 0xFFFF); | |
1da177e4 LT |
835 | } |
836 | } | |
837 | ||
838 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 839 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
fcbf7637 | 840 | udf_debug("Fileset at block=%u, partition=%u\n", |
cb00ea35 CG |
841 | fileset->logicalBlockNum, |
842 | fileset->partitionReferenceNum); | |
1da177e4 | 843 | |
6c79e987 | 844 | sbi->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 845 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 846 | brelse(bh); |
1da177e4 LT |
847 | return 0; |
848 | } | |
849 | return 1; | |
850 | } | |
851 | ||
d759bfa4 JK |
852 | /* |
853 | * Load primary Volume Descriptor Sequence | |
854 | * | |
855 | * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence | |
856 | * should be tried. | |
857 | */ | |
c0eb31ed | 858 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
859 | { |
860 | struct primaryVolDesc *pvoldesc; | |
9293fcfb | 861 | uint8_t *outstr; |
c0eb31ed JK |
862 | struct buffer_head *bh; |
863 | uint16_t ident; | |
d759bfa4 | 864 | int ret = -ENOMEM; |
ba9aadd8 | 865 | |
9293fcfb | 866 | outstr = kmalloc(128, GFP_NOFS); |
ba9aadd8 | 867 | if (!outstr) |
9293fcfb | 868 | return -ENOMEM; |
c0eb31ed JK |
869 | |
870 | bh = udf_read_tagged(sb, block, block, &ident); | |
d759bfa4 JK |
871 | if (!bh) { |
872 | ret = -EAGAIN; | |
ba9aadd8 | 873 | goto out2; |
d759bfa4 | 874 | } |
ba9aadd8 | 875 | |
d759bfa4 JK |
876 | if (ident != TAG_IDENT_PVD) { |
877 | ret = -EIO; | |
878 | goto out_bh; | |
879 | } | |
1da177e4 LT |
880 | |
881 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
882 | ||
56774805 MS |
883 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
884 | pvoldesc->recordingDateAndTime)) { | |
af15a298 | 885 | #ifdef UDFFS_DEBUG |
5ca4e4be | 886 | struct timestamp *ts = &pvoldesc->recordingDateAndTime; |
a983f368 | 887 | udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", |
af15a298 MS |
888 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, |
889 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
890 | #endif | |
1da177e4 LT |
891 | } |
892 | ||
c26f6c61 | 893 | ret = udf_dstrCS0toUTF8(outstr, 31, pvoldesc->volIdent, 32); |
9293fcfb AG |
894 | if (ret < 0) |
895 | goto out_bh; | |
e9d4cf41 | 896 | |
9293fcfb AG |
897 | strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret); |
898 | udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident); | |
1da177e4 | 899 | |
c26f6c61 | 900 | ret = udf_dstrCS0toUTF8(outstr, 127, pvoldesc->volSetIdent, 128); |
9293fcfb AG |
901 | if (ret < 0) |
902 | goto out_bh; | |
e9d4cf41 | 903 | |
9293fcfb AG |
904 | outstr[ret] = 0; |
905 | udf_debug("volSetIdent[] = '%s'\n", outstr); | |
c0eb31ed | 906 | |
ba9aadd8 | 907 | ret = 0; |
d759bfa4 JK |
908 | out_bh: |
909 | brelse(bh); | |
ba9aadd8 MS |
910 | out2: |
911 | kfree(outstr); | |
ba9aadd8 | 912 | return ret; |
1da177e4 LT |
913 | } |
914 | ||
3080a74e | 915 | struct inode *udf_find_metadata_inode_efe(struct super_block *sb, |
7888824b | 916 | u32 meta_file_loc, u32 partition_ref) |
3080a74e NJ |
917 | { |
918 | struct kernel_lb_addr addr; | |
919 | struct inode *metadata_fe; | |
920 | ||
921 | addr.logicalBlockNum = meta_file_loc; | |
7888824b | 922 | addr.partitionReferenceNum = partition_ref; |
3080a74e | 923 | |
6174c2eb | 924 | metadata_fe = udf_iget_special(sb, &addr); |
3080a74e | 925 | |
6d3d5e86 | 926 | if (IS_ERR(metadata_fe)) { |
3080a74e | 927 | udf_warn(sb, "metadata inode efe not found\n"); |
6d3d5e86 JK |
928 | return metadata_fe; |
929 | } | |
930 | if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { | |
3080a74e NJ |
931 | udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); |
932 | iput(metadata_fe); | |
6d3d5e86 | 933 | return ERR_PTR(-EIO); |
3080a74e NJ |
934 | } |
935 | ||
936 | return metadata_fe; | |
937 | } | |
938 | ||
7888824b AT |
939 | static int udf_load_metadata_files(struct super_block *sb, int partition, |
940 | int type1_index) | |
bfb257a5 JK |
941 | { |
942 | struct udf_sb_info *sbi = UDF_SB(sb); | |
943 | struct udf_part_map *map; | |
944 | struct udf_meta_data *mdata; | |
5ca4e4be | 945 | struct kernel_lb_addr addr; |
6d3d5e86 | 946 | struct inode *fe; |
bfb257a5 JK |
947 | |
948 | map = &sbi->s_partmaps[partition]; | |
949 | mdata = &map->s_type_specific.s_metadata; | |
7888824b | 950 | mdata->s_phys_partition_ref = type1_index; |
bfb257a5 JK |
951 | |
952 | /* metadata address */ | |
fcbf7637 | 953 | udf_debug("Metadata file location: block = %u part = %u\n", |
7888824b | 954 | mdata->s_meta_file_loc, mdata->s_phys_partition_ref); |
bfb257a5 | 955 | |
6d3d5e86 | 956 | fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc, |
7888824b | 957 | mdata->s_phys_partition_ref); |
6d3d5e86 | 958 | if (IS_ERR(fe)) { |
3080a74e | 959 | /* mirror file entry */ |
fcbf7637 | 960 | udf_debug("Mirror metadata file location: block = %u part = %u\n", |
7888824b | 961 | mdata->s_mirror_file_loc, mdata->s_phys_partition_ref); |
bfb257a5 | 962 | |
6d3d5e86 | 963 | fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc, |
7888824b | 964 | mdata->s_phys_partition_ref); |
bfb257a5 | 965 | |
6d3d5e86 | 966 | if (IS_ERR(fe)) { |
3080a74e | 967 | udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); |
6d3d5e86 | 968 | return PTR_ERR(fe); |
3080a74e | 969 | } |
6d3d5e86 JK |
970 | mdata->s_mirror_fe = fe; |
971 | } else | |
972 | mdata->s_metadata_fe = fe; | |
973 | ||
bfb257a5 JK |
974 | |
975 | /* | |
976 | * bitmap file entry | |
977 | * Note: | |
978 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) | |
979 | */ | |
980 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { | |
981 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; | |
7888824b | 982 | addr.partitionReferenceNum = mdata->s_phys_partition_ref; |
bfb257a5 | 983 | |
fcbf7637 | 984 | udf_debug("Bitmap file location: block = %u part = %u\n", |
a983f368 | 985 | addr.logicalBlockNum, addr.partitionReferenceNum); |
bfb257a5 | 986 | |
6174c2eb | 987 | fe = udf_iget_special(sb, &addr); |
6d3d5e86 | 988 | if (IS_ERR(fe)) { |
bc98a42c | 989 | if (sb_rdonly(sb)) |
a40ecd7b | 990 | udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); |
bfb257a5 | 991 | else { |
8076c363 | 992 | udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); |
6d3d5e86 | 993 | return PTR_ERR(fe); |
bfb257a5 | 994 | } |
6d3d5e86 JK |
995 | } else |
996 | mdata->s_bitmap_fe = fe; | |
bfb257a5 JK |
997 | } |
998 | ||
999 | udf_debug("udf_load_metadata_files Ok\n"); | |
bfb257a5 | 1000 | return 0; |
bfb257a5 JK |
1001 | } |
1002 | ||
28de7948 | 1003 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
5ca4e4be | 1004 | struct kernel_lb_addr *root) |
1da177e4 LT |
1005 | { |
1006 | struct fileSetDesc *fset; | |
1007 | ||
1008 | fset = (struct fileSetDesc *)bh->b_data; | |
1009 | ||
1010 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
1011 | ||
6c79e987 | 1012 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 1013 | |
fcbf7637 | 1014 | udf_debug("Rootdir at block=%u, partition=%u\n", |
cb00ea35 | 1015 | root->logicalBlockNum, root->partitionReferenceNum); |
1da177e4 LT |
1016 | } |
1017 | ||
883cb9d1 MS |
1018 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
1019 | { | |
1020 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
1021 | return DIV_ROUND_UP(map->s_partition_len + |
1022 | (sizeof(struct spaceBitmapDesc) << 3), | |
1023 | sb->s_blocksize * 8); | |
883cb9d1 MS |
1024 | } |
1025 | ||
66e1da3f MS |
1026 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
1027 | { | |
66e1da3f MS |
1028 | struct udf_bitmap *bitmap; |
1029 | int nr_groups; | |
1030 | int size; | |
1031 | ||
883cb9d1 | 1032 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
1033 | size = sizeof(struct udf_bitmap) + |
1034 | (sizeof(struct buffer_head *) * nr_groups); | |
1035 | ||
1036 | if (size <= PAGE_SIZE) | |
ed2ae6f6 | 1037 | bitmap = kzalloc(size, GFP_KERNEL); |
66e1da3f | 1038 | else |
ed2ae6f6 | 1039 | bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ |
66e1da3f | 1040 | |
ba2eb866 | 1041 | if (!bitmap) |
66e1da3f | 1042 | return NULL; |
66e1da3f | 1043 | |
66e1da3f MS |
1044 | bitmap->s_nr_groups = nr_groups; |
1045 | return bitmap; | |
1046 | } | |
1047 | ||
3fb38dfa JK |
1048 | static int udf_fill_partdesc_info(struct super_block *sb, |
1049 | struct partitionDesc *p, int p_index) | |
1da177e4 | 1050 | { |
6c79e987 | 1051 | struct udf_part_map *map; |
165923fa | 1052 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 1053 | struct partitionHeaderDesc *phd; |
165923fa | 1054 | |
3fb38dfa | 1055 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
1056 | |
1057 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
1058 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
1059 | ||
1060 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
1061 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
1062 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
1063 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
1064 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
1065 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
1066 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
1067 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
1068 | ||
fcbf7637 | 1069 | udf_debug("Partition (%d type %x) starts at physical %u, block length %u\n", |
a983f368 JP |
1070 | p_index, map->s_partition_type, |
1071 | map->s_partition_root, map->s_partition_len); | |
165923fa MS |
1072 | |
1073 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
1074 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
3fb38dfa | 1075 | return 0; |
165923fa MS |
1076 | |
1077 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1078 | if (phd->unallocSpaceTable.extLength) { | |
5ca4e4be | 1079 | struct kernel_lb_addr loc = { |
165923fa MS |
1080 | .logicalBlockNum = le32_to_cpu( |
1081 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 1082 | .partitionReferenceNum = p_index, |
165923fa | 1083 | }; |
6d3d5e86 | 1084 | struct inode *inode; |
165923fa | 1085 | |
6174c2eb | 1086 | inode = udf_iget_special(sb, &loc); |
6d3d5e86 | 1087 | if (IS_ERR(inode)) { |
165923fa | 1088 | udf_debug("cannot load unallocSpaceTable (part %d)\n", |
a983f368 | 1089 | p_index); |
6d3d5e86 | 1090 | return PTR_ERR(inode); |
165923fa | 1091 | } |
6d3d5e86 | 1092 | map->s_uspace.s_table = inode; |
165923fa | 1093 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; |
fcbf7637 | 1094 | udf_debug("unallocSpaceTable (part %d) @ %lu\n", |
a983f368 | 1095 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1096 | } |
1097 | ||
1098 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1099 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1100 | if (!bitmap) | |
d759bfa4 | 1101 | return -ENOMEM; |
165923fa | 1102 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1103 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1104 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1105 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
fcbf7637 | 1106 | udf_debug("unallocSpaceBitmap (part %d) @ %u\n", |
a983f368 | 1107 | p_index, bitmap->s_extPosition); |
165923fa MS |
1108 | } |
1109 | ||
1110 | if (phd->partitionIntegrityTable.extLength) | |
3fb38dfa | 1111 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); |
165923fa MS |
1112 | |
1113 | if (phd->freedSpaceTable.extLength) { | |
5ca4e4be | 1114 | struct kernel_lb_addr loc = { |
165923fa MS |
1115 | .logicalBlockNum = le32_to_cpu( |
1116 | phd->freedSpaceTable.extPosition), | |
3fb38dfa | 1117 | .partitionReferenceNum = p_index, |
165923fa | 1118 | }; |
6d3d5e86 | 1119 | struct inode *inode; |
165923fa | 1120 | |
6174c2eb | 1121 | inode = udf_iget_special(sb, &loc); |
6d3d5e86 | 1122 | if (IS_ERR(inode)) { |
3fb38dfa | 1123 | udf_debug("cannot load freedSpaceTable (part %d)\n", |
a983f368 | 1124 | p_index); |
6d3d5e86 | 1125 | return PTR_ERR(inode); |
165923fa | 1126 | } |
6d3d5e86 | 1127 | map->s_fspace.s_table = inode; |
165923fa | 1128 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; |
fcbf7637 | 1129 | udf_debug("freedSpaceTable (part %d) @ %lu\n", |
a983f368 | 1130 | p_index, map->s_fspace.s_table->i_ino); |
165923fa MS |
1131 | } |
1132 | ||
1133 | if (phd->freedSpaceBitmap.extLength) { | |
3fb38dfa JK |
1134 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1135 | if (!bitmap) | |
d759bfa4 | 1136 | return -ENOMEM; |
165923fa | 1137 | map->s_fspace.s_bitmap = bitmap; |
2e0838fd | 1138 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1139 | phd->freedSpaceBitmap.extPosition); |
2e0838fd | 1140 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
fcbf7637 | 1141 | udf_debug("freedSpaceBitmap (part %d) @ %u\n", |
a983f368 | 1142 | p_index, bitmap->s_extPosition); |
165923fa | 1143 | } |
3fb38dfa JK |
1144 | return 0; |
1145 | } | |
1146 | ||
e971b0b9 JK |
1147 | static void udf_find_vat_block(struct super_block *sb, int p_index, |
1148 | int type1_index, sector_t start_block) | |
38b74a53 JK |
1149 | { |
1150 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1151 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
e971b0b9 | 1152 | sector_t vat_block; |
5ca4e4be | 1153 | struct kernel_lb_addr ino; |
6d3d5e86 | 1154 | struct inode *inode; |
e971b0b9 JK |
1155 | |
1156 | /* | |
1157 | * VAT file entry is in the last recorded block. Some broken disks have | |
1158 | * it a few blocks before so try a bit harder... | |
1159 | */ | |
1160 | ino.partitionReferenceNum = type1_index; | |
1161 | for (vat_block = start_block; | |
1162 | vat_block >= map->s_partition_root && | |
6d3d5e86 | 1163 | vat_block >= start_block - 3; vat_block--) { |
e971b0b9 | 1164 | ino.logicalBlockNum = vat_block - map->s_partition_root; |
6174c2eb | 1165 | inode = udf_iget_special(sb, &ino); |
6d3d5e86 JK |
1166 | if (!IS_ERR(inode)) { |
1167 | sbi->s_vat_inode = inode; | |
1168 | break; | |
1169 | } | |
e971b0b9 JK |
1170 | } |
1171 | } | |
1172 | ||
1173 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) | |
1174 | { | |
1175 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1176 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
fa5e0815 JK |
1177 | struct buffer_head *bh = NULL; |
1178 | struct udf_inode_info *vati; | |
1179 | uint32_t pos; | |
1180 | struct virtualAllocationTable20 *vat20; | |
23bcda11 FF |
1181 | sector_t blocks = i_size_read(sb->s_bdev->bd_inode) >> |
1182 | sb->s_blocksize_bits; | |
38b74a53 | 1183 | |
e971b0b9 | 1184 | udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); |
4bf17af0 JK |
1185 | if (!sbi->s_vat_inode && |
1186 | sbi->s_last_block != blocks - 1) { | |
78ace70c JP |
1187 | pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", |
1188 | (unsigned long)sbi->s_last_block, | |
1189 | (unsigned long)blocks - 1); | |
e971b0b9 | 1190 | udf_find_vat_block(sb, p_index, type1_index, blocks - 1); |
4bf17af0 | 1191 | } |
38b74a53 | 1192 | if (!sbi->s_vat_inode) |
d759bfa4 | 1193 | return -EIO; |
38b74a53 JK |
1194 | |
1195 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
47c9358a | 1196 | map->s_type_specific.s_virtual.s_start_offset = 0; |
38b74a53 JK |
1197 | map->s_type_specific.s_virtual.s_num_entries = |
1198 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1199 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
fa5e0815 JK |
1200 | vati = UDF_I(sbi->s_vat_inode); |
1201 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1202 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1203 | bh = sb_bread(sb, pos); | |
1204 | if (!bh) | |
d759bfa4 | 1205 | return -EIO; |
fa5e0815 JK |
1206 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; |
1207 | } else { | |
1208 | vat20 = (struct virtualAllocationTable20 *) | |
1209 | vati->i_ext.i_data; | |
1210 | } | |
38b74a53 | 1211 | |
38b74a53 | 1212 | map->s_type_specific.s_virtual.s_start_offset = |
47c9358a | 1213 | le16_to_cpu(vat20->lengthHeader); |
38b74a53 JK |
1214 | map->s_type_specific.s_virtual.s_num_entries = |
1215 | (sbi->s_vat_inode->i_size - | |
1216 | map->s_type_specific.s_virtual. | |
1217 | s_start_offset) >> 2; | |
1218 | brelse(bh); | |
1219 | } | |
1220 | return 0; | |
1221 | } | |
1222 | ||
d759bfa4 JK |
1223 | /* |
1224 | * Load partition descriptor block | |
1225 | * | |
1226 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor | |
1227 | * sequence. | |
1228 | */ | |
3fb38dfa JK |
1229 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
1230 | { | |
1231 | struct buffer_head *bh; | |
1232 | struct partitionDesc *p; | |
1233 | struct udf_part_map *map; | |
1234 | struct udf_sb_info *sbi = UDF_SB(sb); | |
38b74a53 | 1235 | int i, type1_idx; |
3fb38dfa JK |
1236 | uint16_t partitionNumber; |
1237 | uint16_t ident; | |
d759bfa4 | 1238 | int ret; |
3fb38dfa JK |
1239 | |
1240 | bh = udf_read_tagged(sb, block, block, &ident); | |
1241 | if (!bh) | |
d759bfa4 JK |
1242 | return -EAGAIN; |
1243 | if (ident != TAG_IDENT_PD) { | |
1244 | ret = 0; | |
3fb38dfa | 1245 | goto out_bh; |
d759bfa4 | 1246 | } |
3fb38dfa JK |
1247 | |
1248 | p = (struct partitionDesc *)bh->b_data; | |
1249 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
38b74a53 | 1250 | |
7888824b | 1251 | /* First scan for TYPE1 and SPARABLE partitions */ |
3fb38dfa JK |
1252 | for (i = 0; i < sbi->s_partitions; i++) { |
1253 | map = &sbi->s_partmaps[i]; | |
fcbf7637 | 1254 | udf_debug("Searching map: (%u == %u)\n", |
3fb38dfa | 1255 | map->s_partition_num, partitionNumber); |
38b74a53 JK |
1256 | if (map->s_partition_num == partitionNumber && |
1257 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1258 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
3fb38dfa JK |
1259 | break; |
1260 | } | |
1261 | ||
38b74a53 | 1262 | if (i >= sbi->s_partitions) { |
fcbf7637 | 1263 | udf_debug("Partition (%u) not found in partition map\n", |
3fb38dfa | 1264 | partitionNumber); |
d759bfa4 | 1265 | ret = 0; |
3fb38dfa JK |
1266 | goto out_bh; |
1267 | } | |
165923fa | 1268 | |
3fb38dfa | 1269 | ret = udf_fill_partdesc_info(sb, p, i); |
d759bfa4 JK |
1270 | if (ret < 0) |
1271 | goto out_bh; | |
38b74a53 JK |
1272 | |
1273 | /* | |
bfb257a5 JK |
1274 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
1275 | * PHYSICAL partitions are already set up | |
38b74a53 JK |
1276 | */ |
1277 | type1_idx = i; | |
44499602 PF |
1278 | #ifdef UDFFS_DEBUG |
1279 | map = NULL; /* supress 'maybe used uninitialized' warning */ | |
1280 | #endif | |
38b74a53 JK |
1281 | for (i = 0; i < sbi->s_partitions; i++) { |
1282 | map = &sbi->s_partmaps[i]; | |
1283 | ||
1284 | if (map->s_partition_num == partitionNumber && | |
1285 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
bfb257a5 JK |
1286 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
1287 | map->s_partition_type == UDF_METADATA_MAP25)) | |
38b74a53 JK |
1288 | break; |
1289 | } | |
1290 | ||
d759bfa4 JK |
1291 | if (i >= sbi->s_partitions) { |
1292 | ret = 0; | |
38b74a53 | 1293 | goto out_bh; |
d759bfa4 | 1294 | } |
38b74a53 JK |
1295 | |
1296 | ret = udf_fill_partdesc_info(sb, p, i); | |
d759bfa4 | 1297 | if (ret < 0) |
38b74a53 JK |
1298 | goto out_bh; |
1299 | ||
bfb257a5 | 1300 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
7888824b | 1301 | ret = udf_load_metadata_files(sb, i, type1_idx); |
d759bfa4 | 1302 | if (ret < 0) { |
78ace70c JP |
1303 | udf_err(sb, "error loading MetaData partition map %d\n", |
1304 | i); | |
bfb257a5 JK |
1305 | goto out_bh; |
1306 | } | |
1307 | } else { | |
e729eac6 JK |
1308 | /* |
1309 | * If we have a partition with virtual map, we don't handle | |
1310 | * writing to it (we overwrite blocks instead of relocating | |
1311 | * them). | |
1312 | */ | |
bc98a42c | 1313 | if (!sb_rdonly(sb)) { |
e729eac6 JK |
1314 | ret = -EACCES; |
1315 | goto out_bh; | |
1316 | } | |
bfb257a5 | 1317 | ret = udf_load_vat(sb, i, type1_idx); |
d759bfa4 | 1318 | if (ret < 0) |
bfb257a5 | 1319 | goto out_bh; |
bfb257a5 | 1320 | } |
d759bfa4 | 1321 | ret = 0; |
c0eb31ed | 1322 | out_bh: |
2e0838fd | 1323 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1324 | brelse(bh); |
1325 | return ret; | |
1da177e4 LT |
1326 | } |
1327 | ||
1df2ae31 JK |
1328 | static int udf_load_sparable_map(struct super_block *sb, |
1329 | struct udf_part_map *map, | |
1330 | struct sparablePartitionMap *spm) | |
1331 | { | |
1332 | uint32_t loc; | |
1333 | uint16_t ident; | |
1334 | struct sparingTable *st; | |
1335 | struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing; | |
1336 | int i; | |
1337 | struct buffer_head *bh; | |
1338 | ||
1339 | map->s_partition_type = UDF_SPARABLE_MAP15; | |
1340 | sdata->s_packet_len = le16_to_cpu(spm->packetLength); | |
1341 | if (!is_power_of_2(sdata->s_packet_len)) { | |
1342 | udf_err(sb, "error loading logical volume descriptor: " | |
1343 | "Invalid packet length %u\n", | |
1344 | (unsigned)sdata->s_packet_len); | |
1345 | return -EIO; | |
1346 | } | |
1347 | if (spm->numSparingTables > 4) { | |
1348 | udf_err(sb, "error loading logical volume descriptor: " | |
1349 | "Too many sparing tables (%d)\n", | |
1350 | (int)spm->numSparingTables); | |
1351 | return -EIO; | |
1352 | } | |
1353 | ||
1354 | for (i = 0; i < spm->numSparingTables; i++) { | |
1355 | loc = le32_to_cpu(spm->locSparingTable[i]); | |
1356 | bh = udf_read_tagged(sb, loc, loc, &ident); | |
1357 | if (!bh) | |
1358 | continue; | |
1359 | ||
1360 | st = (struct sparingTable *)bh->b_data; | |
1361 | if (ident != 0 || | |
1362 | strncmp(st->sparingIdent.ident, UDF_ID_SPARING, | |
1363 | strlen(UDF_ID_SPARING)) || | |
1364 | sizeof(*st) + le16_to_cpu(st->reallocationTableLen) > | |
1365 | sb->s_blocksize) { | |
1366 | brelse(bh); | |
1367 | continue; | |
1368 | } | |
1369 | ||
1370 | sdata->s_spar_map[i] = bh; | |
1371 | } | |
1372 | map->s_partition_func = udf_get_pblock_spar15; | |
1373 | return 0; | |
1374 | } | |
1375 | ||
c0eb31ed | 1376 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
5ca4e4be | 1377 | struct kernel_lb_addr *fileset) |
1da177e4 LT |
1378 | { |
1379 | struct logicalVolDesc *lvd; | |
1df2ae31 | 1380 | int i, offset; |
1da177e4 | 1381 | uint8_t type; |
6c79e987 | 1382 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1383 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1384 | uint16_t ident; |
1385 | struct buffer_head *bh; | |
adee11b2 | 1386 | unsigned int table_len; |
d759bfa4 | 1387 | int ret; |
1da177e4 | 1388 | |
c0eb31ed JK |
1389 | bh = udf_read_tagged(sb, block, block, &ident); |
1390 | if (!bh) | |
d759bfa4 | 1391 | return -EAGAIN; |
c0eb31ed | 1392 | BUG_ON(ident != TAG_IDENT_LVD); |
1da177e4 | 1393 | lvd = (struct logicalVolDesc *)bh->b_data; |
adee11b2 | 1394 | table_len = le32_to_cpu(lvd->mapTableLength); |
57b9655d | 1395 | if (table_len > sb->s_blocksize - sizeof(*lvd)) { |
adee11b2 JK |
1396 | udf_err(sb, "error loading logical volume descriptor: " |
1397 | "Partition table too long (%u > %lu)\n", table_len, | |
1398 | sb->s_blocksize - sizeof(*lvd)); | |
d759bfa4 | 1399 | ret = -EIO; |
adee11b2 JK |
1400 | goto out_bh; |
1401 | } | |
1da177e4 | 1402 | |
cb14d340 JK |
1403 | ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
1404 | if (ret) | |
c0eb31ed | 1405 | goto out_bh; |
1da177e4 | 1406 | |
cb00ea35 | 1407 | for (i = 0, offset = 0; |
adee11b2 | 1408 | i < sbi->s_partitions && offset < table_len; |
4b11111a MS |
1409 | i++, offset += gpm->partitionMapLength) { |
1410 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1411 | gpm = (struct genericPartitionMap *) | |
1412 | &(lvd->partitionMaps[offset]); | |
1413 | type = gpm->partitionMapType; | |
cb00ea35 | 1414 | if (type == 1) { |
4b11111a MS |
1415 | struct genericPartitionMap1 *gpm1 = |
1416 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1417 | map->s_partition_type = UDF_TYPE1_MAP15; |
1418 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1419 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1420 | map->s_partition_func = NULL; | |
cb00ea35 | 1421 | } else if (type == 2) { |
4b11111a MS |
1422 | struct udfPartitionMap2 *upm2 = |
1423 | (struct udfPartitionMap2 *)gpm; | |
1424 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1425 | strlen(UDF_ID_VIRTUAL))) { | |
1426 | u16 suf = | |
1427 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1428 | identSuffix)[0]); | |
c82a1275 | 1429 | if (suf < 0x0200) { |
4b11111a MS |
1430 | map->s_partition_type = |
1431 | UDF_VIRTUAL_MAP15; | |
1432 | map->s_partition_func = | |
1433 | udf_get_pblock_virt15; | |
c82a1275 | 1434 | } else { |
4b11111a MS |
1435 | map->s_partition_type = |
1436 | UDF_VIRTUAL_MAP20; | |
1437 | map->s_partition_func = | |
1438 | udf_get_pblock_virt20; | |
1da177e4 | 1439 | } |
4b11111a MS |
1440 | } else if (!strncmp(upm2->partIdent.ident, |
1441 | UDF_ID_SPARABLE, | |
1442 | strlen(UDF_ID_SPARABLE))) { | |
d759bfa4 JK |
1443 | ret = udf_load_sparable_map(sb, map, |
1444 | (struct sparablePartitionMap *)gpm); | |
1445 | if (ret < 0) | |
1df2ae31 | 1446 | goto out_bh; |
bfb257a5 JK |
1447 | } else if (!strncmp(upm2->partIdent.ident, |
1448 | UDF_ID_METADATA, | |
1449 | strlen(UDF_ID_METADATA))) { | |
1450 | struct udf_meta_data *mdata = | |
1451 | &map->s_type_specific.s_metadata; | |
1452 | struct metadataPartitionMap *mdm = | |
1453 | (struct metadataPartitionMap *) | |
1454 | &(lvd->partitionMaps[offset]); | |
fcbf7637 | 1455 | udf_debug("Parsing Logical vol part %d type %u id=%s\n", |
a983f368 | 1456 | i, type, UDF_ID_METADATA); |
bfb257a5 JK |
1457 | |
1458 | map->s_partition_type = UDF_METADATA_MAP25; | |
1459 | map->s_partition_func = udf_get_pblock_meta25; | |
1460 | ||
1461 | mdata->s_meta_file_loc = | |
1462 | le32_to_cpu(mdm->metadataFileLoc); | |
1463 | mdata->s_mirror_file_loc = | |
1464 | le32_to_cpu(mdm->metadataMirrorFileLoc); | |
1465 | mdata->s_bitmap_file_loc = | |
1466 | le32_to_cpu(mdm->metadataBitmapFileLoc); | |
1467 | mdata->s_alloc_unit_size = | |
1468 | le32_to_cpu(mdm->allocUnitSize); | |
1469 | mdata->s_align_unit_size = | |
1470 | le16_to_cpu(mdm->alignUnitSize); | |
ed47a7d0 JK |
1471 | if (mdm->flags & 0x01) |
1472 | mdata->s_flags |= MF_DUPLICATE_MD; | |
bfb257a5 JK |
1473 | |
1474 | udf_debug("Metadata Ident suffix=0x%x\n", | |
a983f368 JP |
1475 | le16_to_cpu(*(__le16 *) |
1476 | mdm->partIdent.identSuffix)); | |
fcbf7637 | 1477 | udf_debug("Metadata part num=%u\n", |
a983f368 | 1478 | le16_to_cpu(mdm->partitionNum)); |
fcbf7637 | 1479 | udf_debug("Metadata part alloc unit size=%u\n", |
a983f368 | 1480 | le32_to_cpu(mdm->allocUnitSize)); |
fcbf7637 | 1481 | udf_debug("Metadata file loc=%u\n", |
a983f368 | 1482 | le32_to_cpu(mdm->metadataFileLoc)); |
fcbf7637 | 1483 | udf_debug("Mirror file loc=%u\n", |
a983f368 | 1484 | le32_to_cpu(mdm->metadataMirrorFileLoc)); |
fcbf7637 | 1485 | udf_debug("Bitmap file loc=%u\n", |
a983f368 | 1486 | le32_to_cpu(mdm->metadataBitmapFileLoc)); |
fcbf7637 | 1487 | udf_debug("Flags: %d %u\n", |
ed47a7d0 | 1488 | mdata->s_flags, mdm->flags); |
cb00ea35 | 1489 | } else { |
3a71fc5d MS |
1490 | udf_debug("Unknown ident: %s\n", |
1491 | upm2->partIdent.ident); | |
1da177e4 LT |
1492 | continue; |
1493 | } | |
6c79e987 MS |
1494 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1495 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 | 1496 | } |
fcbf7637 | 1497 | udf_debug("Partition (%d:%u) type %u on volume %u\n", |
a983f368 | 1498 | i, map->s_partition_num, type, map->s_volumeseqnum); |
1da177e4 LT |
1499 | } |
1500 | ||
cb00ea35 | 1501 | if (fileset) { |
5ca4e4be | 1502 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1503 | |
1504 | *fileset = lelb_to_cpu(la->extLocation); | |
fcbf7637 | 1505 | udf_debug("FileSet found in LogicalVolDesc at block=%u, partition=%u\n", |
a983f368 | 1506 | fileset->logicalBlockNum, |
28de7948 | 1507 | fileset->partitionReferenceNum); |
1da177e4 LT |
1508 | } |
1509 | if (lvd->integritySeqExt.extLength) | |
1510 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
d759bfa4 | 1511 | ret = 0; |
c0eb31ed JK |
1512 | out_bh: |
1513 | brelse(bh); | |
1514 | return ret; | |
1da177e4 LT |
1515 | } |
1516 | ||
1517 | /* | |
a47241cd | 1518 | * Find the prevailing Logical Volume Integrity Descriptor. |
1da177e4 | 1519 | */ |
5ca4e4be | 1520 | static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) |
1da177e4 | 1521 | { |
a47241cd | 1522 | struct buffer_head *bh, *final_bh; |
1da177e4 | 1523 | uint16_t ident; |
6c79e987 MS |
1524 | struct udf_sb_info *sbi = UDF_SB(sb); |
1525 | struct logicalVolIntegrityDesc *lvid; | |
a47241cd AT |
1526 | int indirections = 0; |
1527 | ||
1528 | while (++indirections <= UDF_MAX_LVID_NESTING) { | |
1529 | final_bh = NULL; | |
1530 | while (loc.extLength > 0 && | |
1531 | (bh = udf_read_tagged(sb, loc.extLocation, | |
1532 | loc.extLocation, &ident))) { | |
1533 | if (ident != TAG_IDENT_LVID) { | |
1534 | brelse(bh); | |
1535 | break; | |
1536 | } | |
1537 | ||
1538 | brelse(final_bh); | |
1539 | final_bh = bh; | |
1da177e4 | 1540 | |
a47241cd AT |
1541 | loc.extLength -= sb->s_blocksize; |
1542 | loc.extLocation++; | |
1543 | } | |
cb00ea35 | 1544 | |
a47241cd AT |
1545 | if (!final_bh) |
1546 | return; | |
cb00ea35 | 1547 | |
a47241cd AT |
1548 | brelse(sbi->s_lvid_bh); |
1549 | sbi->s_lvid_bh = final_bh; | |
1550 | ||
1551 | lvid = (struct logicalVolIntegrityDesc *)final_bh->b_data; | |
1552 | if (lvid->nextIntegrityExt.extLength == 0) | |
1553 | return; | |
1554 | ||
1555 | loc = leea_to_cpu(lvid->nextIntegrityExt); | |
1da177e4 | 1556 | } |
a47241cd AT |
1557 | |
1558 | udf_warn(sb, "Too many LVID indirections (max %u), ignoring.\n", | |
1559 | UDF_MAX_LVID_NESTING); | |
1560 | brelse(sbi->s_lvid_bh); | |
1561 | sbi->s_lvid_bh = NULL; | |
1da177e4 LT |
1562 | } |
1563 | ||
7b78fd02 JK |
1564 | /* |
1565 | * Step for reallocation of table of partition descriptor sequence numbers. | |
1566 | * Must be power of 2. | |
1567 | */ | |
1568 | #define PART_DESC_ALLOC_STEP 32 | |
1569 | ||
1570 | struct desc_seq_scan_data { | |
1571 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
1572 | unsigned int size_part_descs; | |
1573 | struct udf_vds_record *part_descs_loc; | |
1574 | }; | |
1575 | ||
1576 | static struct udf_vds_record *handle_partition_descriptor( | |
1577 | struct buffer_head *bh, | |
1578 | struct desc_seq_scan_data *data) | |
1579 | { | |
1580 | struct partitionDesc *desc = (struct partitionDesc *)bh->b_data; | |
1581 | int partnum; | |
1582 | ||
1583 | partnum = le16_to_cpu(desc->partitionNumber); | |
1584 | if (partnum >= data->size_part_descs) { | |
1585 | struct udf_vds_record *new_loc; | |
1586 | unsigned int new_size = ALIGN(partnum, PART_DESC_ALLOC_STEP); | |
1587 | ||
1588 | new_loc = kzalloc(sizeof(*new_loc) * new_size, GFP_KERNEL); | |
1589 | if (!new_loc) | |
1590 | return ERR_PTR(-ENOMEM); | |
1591 | memcpy(new_loc, data->part_descs_loc, | |
1592 | data->size_part_descs * sizeof(*new_loc)); | |
1593 | kfree(data->part_descs_loc); | |
1594 | data->part_descs_loc = new_loc; | |
1595 | data->size_part_descs = new_size; | |
1596 | } | |
1597 | return &(data->part_descs_loc[partnum]); | |
1598 | } | |
1599 | ||
1600 | ||
1601 | static struct udf_vds_record *get_volume_descriptor_record(uint16_t ident, | |
1602 | struct buffer_head *bh, struct desc_seq_scan_data *data) | |
18cf4781 JK |
1603 | { |
1604 | switch (ident) { | |
1605 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ | |
7b78fd02 | 1606 | return &(data->vds[VDS_POS_PRIMARY_VOL_DESC]); |
18cf4781 | 1607 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
7b78fd02 | 1608 | return &(data->vds[VDS_POS_IMP_USE_VOL_DESC]); |
18cf4781 | 1609 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
7b78fd02 | 1610 | return &(data->vds[VDS_POS_LOGICAL_VOL_DESC]); |
18cf4781 | 1611 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
7b78fd02 JK |
1612 | return &(data->vds[VDS_POS_UNALLOC_SPACE_DESC]); |
1613 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ | |
1614 | return handle_partition_descriptor(bh, data); | |
18cf4781 JK |
1615 | } |
1616 | return NULL; | |
1617 | } | |
e7a4eb86 | 1618 | |
1da177e4 | 1619 | /* |
d759bfa4 JK |
1620 | * Process a main/reserve volume descriptor sequence. |
1621 | * @block First block of first extent of the sequence. | |
1622 | * @lastblock Lastblock of first extent of the sequence. | |
1623 | * @fileset There we store extent containing root fileset | |
1da177e4 | 1624 | * |
d759bfa4 JK |
1625 | * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor |
1626 | * sequence | |
1da177e4 | 1627 | */ |
d759bfa4 JK |
1628 | static noinline int udf_process_sequence( |
1629 | struct super_block *sb, | |
1630 | sector_t block, sector_t lastblock, | |
1631 | struct kernel_lb_addr *fileset) | |
1da177e4 LT |
1632 | { |
1633 | struct buffer_head *bh = NULL; | |
4b11111a | 1634 | struct udf_vds_record *curr; |
1da177e4 LT |
1635 | struct generic_desc *gd; |
1636 | struct volDescPtr *vdp; | |
2b8f9421 | 1637 | bool done = false; |
1da177e4 LT |
1638 | uint32_t vdsn; |
1639 | uint16_t ident; | |
d759bfa4 | 1640 | int ret; |
e7a4eb86 | 1641 | unsigned int indirections = 0; |
7b78fd02 JK |
1642 | struct desc_seq_scan_data data; |
1643 | unsigned int i; | |
1644 | ||
1645 | memset(data.vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1646 | data.size_part_descs = PART_DESC_ALLOC_STEP; | |
1647 | data.part_descs_loc = kzalloc(sizeof(*data.part_descs_loc) * | |
1648 | data.size_part_descs, GFP_KERNEL); | |
1649 | if (!data.part_descs_loc) | |
1650 | return -ENOMEM; | |
1da177e4 | 1651 | |
c0eb31ed JK |
1652 | /* |
1653 | * Read the main descriptor sequence and find which descriptors | |
1654 | * are in it. | |
1655 | */ | |
cb00ea35 | 1656 | for (; (!done && block <= lastblock); block++) { |
1da177e4 LT |
1657 | |
1658 | bh = udf_read_tagged(sb, block, block, &ident); | |
67621675 JK |
1659 | if (!bh) |
1660 | break; | |
1da177e4 LT |
1661 | |
1662 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1663 | gd = (struct generic_desc *)bh->b_data; | |
1664 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1665 | switch (ident) { |
28de7948 | 1666 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
7b568cba JK |
1667 | if (++indirections > UDF_MAX_TD_NESTING) { |
1668 | udf_err(sb, "too many Volume Descriptor " | |
1669 | "Pointers (max %u supported)\n", | |
1670 | UDF_MAX_TD_NESTING); | |
1671 | brelse(bh); | |
1672 | return -EIO; | |
cb00ea35 | 1673 | } |
7b568cba JK |
1674 | |
1675 | vdp = (struct volDescPtr *)bh->b_data; | |
1676 | block = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation); | |
1677 | lastblock = le32_to_cpu( | |
1678 | vdp->nextVolDescSeqExt.extLength) >> | |
1679 | sb->s_blocksize_bits; | |
1680 | lastblock += block - 1; | |
1681 | /* For loop is going to increment 'block' again */ | |
1682 | block--; | |
cb00ea35 | 1683 | break; |
18cf4781 | 1684 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
28de7948 | 1685 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
18cf4781 JK |
1686 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
1687 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ | |
7b78fd02 JK |
1688 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
1689 | curr = get_volume_descriptor_record(ident, bh, &data); | |
1690 | if (IS_ERR(curr)) { | |
1691 | brelse(bh); | |
1692 | return PTR_ERR(curr); | |
1693 | } | |
1694 | /* Descriptor we don't care about? */ | |
1695 | if (!curr) | |
1696 | break; | |
4b11111a MS |
1697 | if (vdsn >= curr->volDescSeqNum) { |
1698 | curr->volDescSeqNum = vdsn; | |
1699 | curr->block = block; | |
cb00ea35 CG |
1700 | } |
1701 | break; | |
28de7948 | 1702 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
7b568cba | 1703 | done = true; |
cb00ea35 | 1704 | break; |
1da177e4 | 1705 | } |
3bf25cb4 | 1706 | brelse(bh); |
1da177e4 | 1707 | } |
c0eb31ed JK |
1708 | /* |
1709 | * Now read interesting descriptors again and process them | |
1710 | * in a suitable order | |
1711 | */ | |
7b78fd02 | 1712 | if (!data.vds[VDS_POS_PRIMARY_VOL_DESC].block) { |
78ace70c | 1713 | udf_err(sb, "Primary Volume Descriptor not found!\n"); |
d759bfa4 JK |
1714 | return -EAGAIN; |
1715 | } | |
7b78fd02 | 1716 | ret = udf_load_pvoldesc(sb, data.vds[VDS_POS_PRIMARY_VOL_DESC].block); |
d759bfa4 JK |
1717 | if (ret < 0) |
1718 | return ret; | |
1719 | ||
7b78fd02 | 1720 | if (data.vds[VDS_POS_LOGICAL_VOL_DESC].block) { |
d759bfa4 | 1721 | ret = udf_load_logicalvol(sb, |
7b78fd02 JK |
1722 | data.vds[VDS_POS_LOGICAL_VOL_DESC].block, |
1723 | fileset); | |
d759bfa4 JK |
1724 | if (ret < 0) |
1725 | return ret; | |
c0eb31ed | 1726 | } |
165923fa | 1727 | |
7b78fd02 JK |
1728 | /* Now handle prevailing Partition Descriptors */ |
1729 | for (i = 0; i < data.size_part_descs; i++) { | |
1730 | if (data.part_descs_loc[i].block) { | |
1731 | ret = udf_load_partdesc(sb, | |
1732 | data.part_descs_loc[i].block); | |
d759bfa4 JK |
1733 | if (ret < 0) |
1734 | return ret; | |
1735 | } | |
1da177e4 LT |
1736 | } |
1737 | ||
1738 | return 0; | |
1739 | } | |
1740 | ||
d759bfa4 JK |
1741 | /* |
1742 | * Load Volume Descriptor Sequence described by anchor in bh | |
1743 | * | |
1744 | * Returns <0 on error, 0 on success | |
1745 | */ | |
40346005 JK |
1746 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, |
1747 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1748 | { |
40346005 | 1749 | struct anchorVolDescPtr *anchor; |
d759bfa4 JK |
1750 | sector_t main_s, main_e, reserve_s, reserve_e; |
1751 | int ret; | |
1da177e4 | 1752 | |
40346005 JK |
1753 | anchor = (struct anchorVolDescPtr *)bh->b_data; |
1754 | ||
1755 | /* Locate the main sequence */ | |
1756 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1757 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1758 | main_e = main_e >> sb->s_blocksize_bits; | |
91c9c9ec | 1759 | main_e += main_s - 1; |
40346005 JK |
1760 | |
1761 | /* Locate the reserve sequence */ | |
1762 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); | |
1763 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); | |
1764 | reserve_e = reserve_e >> sb->s_blocksize_bits; | |
91c9c9ec | 1765 | reserve_e += reserve_s - 1; |
40346005 JK |
1766 | |
1767 | /* Process the main & reserve sequences */ | |
1768 | /* responsible for finding the PartitionDesc(s) */ | |
d759bfa4 JK |
1769 | ret = udf_process_sequence(sb, main_s, main_e, fileset); |
1770 | if (ret != -EAGAIN) | |
1771 | return ret; | |
bff943af | 1772 | udf_sb_free_partitions(sb); |
d759bfa4 JK |
1773 | ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset); |
1774 | if (ret < 0) { | |
1775 | udf_sb_free_partitions(sb); | |
1776 | /* No sequence was OK, return -EIO */ | |
1777 | if (ret == -EAGAIN) | |
1778 | ret = -EIO; | |
1779 | } | |
1780 | return ret; | |
1da177e4 LT |
1781 | } |
1782 | ||
40346005 JK |
1783 | /* |
1784 | * Check whether there is an anchor block in the given block and | |
1785 | * load Volume Descriptor Sequence if so. | |
d759bfa4 JK |
1786 | * |
1787 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor | |
1788 | * block | |
40346005 JK |
1789 | */ |
1790 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, | |
1791 | struct kernel_lb_addr *fileset) | |
1197e4df | 1792 | { |
40346005 JK |
1793 | struct buffer_head *bh; |
1794 | uint16_t ident; | |
1795 | int ret; | |
1197e4df | 1796 | |
40346005 JK |
1797 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
1798 | udf_fixed_to_variable(block) >= | |
23bcda11 | 1799 | i_size_read(sb->s_bdev->bd_inode) >> sb->s_blocksize_bits) |
d759bfa4 | 1800 | return -EAGAIN; |
40346005 JK |
1801 | |
1802 | bh = udf_read_tagged(sb, block, block, &ident); | |
1803 | if (!bh) | |
d759bfa4 | 1804 | return -EAGAIN; |
40346005 JK |
1805 | if (ident != TAG_IDENT_AVDP) { |
1806 | brelse(bh); | |
d759bfa4 | 1807 | return -EAGAIN; |
1197e4df | 1808 | } |
40346005 JK |
1809 | ret = udf_load_sequence(sb, bh, fileset); |
1810 | brelse(bh); | |
1811 | return ret; | |
1197e4df CL |
1812 | } |
1813 | ||
d759bfa4 JK |
1814 | /* |
1815 | * Search for an anchor volume descriptor pointer. | |
1816 | * | |
1817 | * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set | |
1818 | * of anchors. | |
1819 | */ | |
1820 | static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock, | |
1821 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1822 | { |
40346005 | 1823 | sector_t last[6]; |
38b74a53 | 1824 | int i; |
40346005 JK |
1825 | struct udf_sb_info *sbi = UDF_SB(sb); |
1826 | int last_count = 0; | |
d759bfa4 | 1827 | int ret; |
1da177e4 | 1828 | |
40346005 JK |
1829 | /* First try user provided anchor */ |
1830 | if (sbi->s_anchor) { | |
d759bfa4 JK |
1831 | ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset); |
1832 | if (ret != -EAGAIN) | |
1833 | return ret; | |
40346005 JK |
1834 | } |
1835 | /* | |
1836 | * according to spec, anchor is in either: | |
1837 | * block 256 | |
1838 | * lastblock-256 | |
1839 | * lastblock | |
1840 | * however, if the disc isn't closed, it could be 512. | |
1841 | */ | |
d759bfa4 JK |
1842 | ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset); |
1843 | if (ret != -EAGAIN) | |
1844 | return ret; | |
40346005 JK |
1845 | /* |
1846 | * The trouble is which block is the last one. Drives often misreport | |
1847 | * this so we try various possibilities. | |
1848 | */ | |
d759bfa4 JK |
1849 | last[last_count++] = *lastblock; |
1850 | if (*lastblock >= 1) | |
1851 | last[last_count++] = *lastblock - 1; | |
1852 | last[last_count++] = *lastblock + 1; | |
1853 | if (*lastblock >= 2) | |
1854 | last[last_count++] = *lastblock - 2; | |
1855 | if (*lastblock >= 150) | |
1856 | last[last_count++] = *lastblock - 150; | |
1857 | if (*lastblock >= 152) | |
1858 | last[last_count++] = *lastblock - 152; | |
1da177e4 | 1859 | |
40346005 | 1860 | for (i = 0; i < last_count; i++) { |
23bcda11 | 1861 | if (last[i] >= i_size_read(sb->s_bdev->bd_inode) >> |
40346005 | 1862 | sb->s_blocksize_bits) |
28f7c4d4 | 1863 | continue; |
d759bfa4 JK |
1864 | ret = udf_check_anchor_block(sb, last[i], fileset); |
1865 | if (ret != -EAGAIN) { | |
1866 | if (!ret) | |
1867 | *lastblock = last[i]; | |
1868 | return ret; | |
1869 | } | |
40346005 | 1870 | if (last[i] < 256) |
28f7c4d4 | 1871 | continue; |
d759bfa4 JK |
1872 | ret = udf_check_anchor_block(sb, last[i] - 256, fileset); |
1873 | if (ret != -EAGAIN) { | |
1874 | if (!ret) | |
1875 | *lastblock = last[i]; | |
1876 | return ret; | |
1877 | } | |
40346005 | 1878 | } |
28f7c4d4 | 1879 | |
40346005 | 1880 | /* Finally try block 512 in case media is open */ |
d759bfa4 | 1881 | return udf_check_anchor_block(sb, sbi->s_session + 512, fileset); |
40346005 | 1882 | } |
28f7c4d4 | 1883 | |
40346005 JK |
1884 | /* |
1885 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from | |
1886 | * area specified by it. The function expects sbi->s_lastblock to be the last | |
1887 | * block on the media. | |
1888 | * | |
d759bfa4 JK |
1889 | * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor |
1890 | * was not found. | |
40346005 JK |
1891 | */ |
1892 | static int udf_find_anchor(struct super_block *sb, | |
1893 | struct kernel_lb_addr *fileset) | |
1894 | { | |
40346005 | 1895 | struct udf_sb_info *sbi = UDF_SB(sb); |
d759bfa4 JK |
1896 | sector_t lastblock = sbi->s_last_block; |
1897 | int ret; | |
28f7c4d4 | 1898 | |
d759bfa4 JK |
1899 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1900 | if (ret != -EAGAIN) | |
40346005 | 1901 | goto out; |
1da177e4 | 1902 | |
40346005 JK |
1903 | /* No anchor found? Try VARCONV conversion of block numbers */ |
1904 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
d759bfa4 | 1905 | lastblock = udf_variable_to_fixed(sbi->s_last_block); |
40346005 | 1906 | /* Firstly, we try to not convert number of the last block */ |
d759bfa4 JK |
1907 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1908 | if (ret != -EAGAIN) | |
40346005 | 1909 | goto out; |
1da177e4 | 1910 | |
d759bfa4 | 1911 | lastblock = sbi->s_last_block; |
40346005 | 1912 | /* Secondly, we try with converted number of the last block */ |
d759bfa4 JK |
1913 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1914 | if (ret < 0) { | |
40346005 JK |
1915 | /* VARCONV didn't help. Clear it. */ |
1916 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); | |
1da177e4 | 1917 | } |
40346005 | 1918 | out: |
d759bfa4 JK |
1919 | if (ret == 0) |
1920 | sbi->s_last_block = lastblock; | |
1921 | return ret; | |
40346005 | 1922 | } |
1da177e4 | 1923 | |
40346005 JK |
1924 | /* |
1925 | * Check Volume Structure Descriptor, find Anchor block and load Volume | |
d759bfa4 JK |
1926 | * Descriptor Sequence. |
1927 | * | |
1928 | * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor | |
1929 | * block was not found. | |
40346005 JK |
1930 | */ |
1931 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, | |
1932 | int silent, struct kernel_lb_addr *fileset) | |
1933 | { | |
1934 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1935 | loff_t nsr_off; | |
d759bfa4 | 1936 | int ret; |
40346005 JK |
1937 | |
1938 | if (!sb_set_blocksize(sb, uopt->blocksize)) { | |
1939 | if (!silent) | |
78ace70c | 1940 | udf_warn(sb, "Bad block size\n"); |
d759bfa4 | 1941 | return -EINVAL; |
40346005 JK |
1942 | } |
1943 | sbi->s_last_block = uopt->lastblock; | |
1944 | if (!uopt->novrs) { | |
1945 | /* Check that it is NSR02 compliant */ | |
1946 | nsr_off = udf_check_vsd(sb); | |
1947 | if (!nsr_off) { | |
1948 | if (!silent) | |
78ace70c | 1949 | udf_warn(sb, "No VRS found\n"); |
70f16cef | 1950 | return -EINVAL; |
40346005 JK |
1951 | } |
1952 | if (nsr_off == -1) | |
44499602 PF |
1953 | udf_debug("Failed to read sector at offset %d. " |
1954 | "Assuming open disc. Skipping validity " | |
1955 | "check\n", VSD_FIRST_SECTOR_OFFSET); | |
40346005 JK |
1956 | if (!sbi->s_last_block) |
1957 | sbi->s_last_block = udf_get_last_block(sb); | |
1958 | } else { | |
1959 | udf_debug("Validity check skipped because of novrs option\n"); | |
28f7c4d4 | 1960 | } |
1da177e4 | 1961 | |
40346005 JK |
1962 | /* Look for anchor block and load Volume Descriptor Sequence */ |
1963 | sbi->s_anchor = uopt->anchor; | |
d759bfa4 JK |
1964 | ret = udf_find_anchor(sb, fileset); |
1965 | if (ret < 0) { | |
1966 | if (!silent && ret == -EAGAIN) | |
78ace70c | 1967 | udf_warn(sb, "No anchor found\n"); |
d759bfa4 | 1968 | return ret; |
40346005 | 1969 | } |
d759bfa4 | 1970 | return 0; |
1da177e4 LT |
1971 | } |
1972 | ||
1973 | static void udf_open_lvid(struct super_block *sb) | |
1974 | { | |
6c79e987 MS |
1975 | struct udf_sb_info *sbi = UDF_SB(sb); |
1976 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
1977 | struct logicalVolIntegrityDesc *lvid; |
1978 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
88b50ce3 | 1979 | struct timespec ts; |
146bca72 | 1980 | |
165923fa MS |
1981 | if (!bh) |
1982 | return; | |
165923fa | 1983 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
69d75671 JK |
1984 | lvidiu = udf_sb_lvidiu(sb); |
1985 | if (!lvidiu) | |
1986 | return; | |
165923fa | 1987 | |
69d75671 | 1988 | mutex_lock(&sbi->s_alloc_mutex); |
165923fa MS |
1989 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
1990 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
88b50ce3 DD |
1991 | ktime_get_real_ts(&ts); |
1992 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts); | |
b72e632c JK |
1993 | if (le32_to_cpu(lvid->integrityType) == LVID_INTEGRITY_TYPE_CLOSE) |
1994 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); | |
1995 | else | |
1996 | UDF_SET_FLAG(sb, UDF_FLAG_INCONSISTENT); | |
165923fa MS |
1997 | |
1998 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1999 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 2000 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
2001 | |
2002 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
2003 | mark_buffer_dirty(bh); | |
146bca72 | 2004 | sbi->s_lvid_dirty = 0; |
949f4a7c | 2005 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
2006 | /* Make opening of filesystem visible on the media immediately */ |
2007 | sync_dirty_buffer(bh); | |
1da177e4 LT |
2008 | } |
2009 | ||
2010 | static void udf_close_lvid(struct super_block *sb) | |
2011 | { | |
6c79e987 MS |
2012 | struct udf_sb_info *sbi = UDF_SB(sb); |
2013 | struct buffer_head *bh = sbi->s_lvid_bh; | |
2014 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 2015 | struct logicalVolIntegrityDescImpUse *lvidiu; |
88b50ce3 | 2016 | struct timespec ts; |
28de7948 | 2017 | |
6c79e987 MS |
2018 | if (!bh) |
2019 | return; | |
69d75671 JK |
2020 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
2021 | lvidiu = udf_sb_lvidiu(sb); | |
2022 | if (!lvidiu) | |
2023 | return; | |
6c79e987 | 2024 | |
949f4a7c | 2025 | mutex_lock(&sbi->s_alloc_mutex); |
165923fa MS |
2026 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
2027 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
88b50ce3 DD |
2028 | ktime_get_real_ts(&ts); |
2029 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts); | |
165923fa MS |
2030 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) |
2031 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
2032 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
2033 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
2034 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
2035 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
b72e632c JK |
2036 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_INCONSISTENT)) |
2037 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
165923fa MS |
2038 | |
2039 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 2040 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 2041 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
2042 | |
2043 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
853a0c25 JK |
2044 | /* |
2045 | * We set buffer uptodate unconditionally here to avoid spurious | |
2046 | * warnings from mark_buffer_dirty() when previous EIO has marked | |
2047 | * the buffer as !uptodate | |
2048 | */ | |
2049 | set_buffer_uptodate(bh); | |
165923fa | 2050 | mark_buffer_dirty(bh); |
146bca72 | 2051 | sbi->s_lvid_dirty = 0; |
949f4a7c | 2052 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
2053 | /* Make closing of filesystem visible on the media immediately */ |
2054 | sync_dirty_buffer(bh); | |
1da177e4 LT |
2055 | } |
2056 | ||
d664b6af JK |
2057 | u64 lvid_get_unique_id(struct super_block *sb) |
2058 | { | |
2059 | struct buffer_head *bh; | |
2060 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2061 | struct logicalVolIntegrityDesc *lvid; | |
2062 | struct logicalVolHeaderDesc *lvhd; | |
2063 | u64 uniqueID; | |
2064 | u64 ret; | |
2065 | ||
2066 | bh = sbi->s_lvid_bh; | |
2067 | if (!bh) | |
2068 | return 0; | |
2069 | ||
2070 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
2071 | lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; | |
2072 | ||
2073 | mutex_lock(&sbi->s_alloc_mutex); | |
2074 | ret = uniqueID = le64_to_cpu(lvhd->uniqueID); | |
2075 | if (!(++uniqueID & 0xFFFFFFFF)) | |
2076 | uniqueID += 16; | |
2077 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
2078 | mutex_unlock(&sbi->s_alloc_mutex); | |
2079 | mark_buffer_dirty(bh); | |
2080 | ||
2081 | return ret; | |
1da177e4 LT |
2082 | } |
2083 | ||
1da177e4 LT |
2084 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
2085 | { | |
d759bfa4 | 2086 | int ret = -EINVAL; |
cb00ea35 | 2087 | struct inode *inode = NULL; |
1da177e4 | 2088 | struct udf_options uopt; |
5ca4e4be | 2089 | struct kernel_lb_addr rootdir, fileset; |
1da177e4 | 2090 | struct udf_sb_info *sbi; |
9181f8bf | 2091 | bool lvid_open = false; |
1da177e4 LT |
2092 | |
2093 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
116e5258 JK |
2094 | /* By default we'll use overflow[ug]id when UDF inode [ug]id == -1 */ |
2095 | uopt.uid = make_kuid(current_user_ns(), overflowuid); | |
2096 | uopt.gid = make_kgid(current_user_ns(), overflowgid); | |
1da177e4 | 2097 | uopt.umask = 0; |
87bc730c MS |
2098 | uopt.fmode = UDF_INVALID_MODE; |
2099 | uopt.dmode = UDF_INVALID_MODE; | |
785dffe1 | 2100 | uopt.nls_map = NULL; |
1da177e4 | 2101 | |
033c9da0 | 2102 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
9db9f9e3 | 2103 | if (!sbi) |
1da177e4 | 2104 | return -ENOMEM; |
28de7948 | 2105 | |
1da177e4 | 2106 | sb->s_fs_info = sbi; |
1da177e4 | 2107 | |
1e7933de | 2108 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 2109 | |
6da80894 | 2110 | if (!udf_parse_options((char *)options, &uopt, false)) |
fdf2657b | 2111 | goto parse_options_failure; |
1da177e4 LT |
2112 | |
2113 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 2114 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
8076c363 | 2115 | udf_err(sb, "utf8 cannot be combined with iocharset\n"); |
fdf2657b | 2116 | goto parse_options_failure; |
1da177e4 | 2117 | } |
cb00ea35 | 2118 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
2119 | uopt.nls_map = load_nls_default(); |
2120 | if (!uopt.nls_map) | |
2121 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
2122 | else | |
2123 | udf_debug("Using default NLS map\n"); | |
2124 | } | |
1da177e4 LT |
2125 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) |
2126 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
2127 | ||
2128 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
2129 | fileset.partitionReferenceNum = 0xFFFF; | |
2130 | ||
6c79e987 MS |
2131 | sbi->s_flags = uopt.flags; |
2132 | sbi->s_uid = uopt.uid; | |
2133 | sbi->s_gid = uopt.gid; | |
2134 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
2135 | sbi->s_fmode = uopt.fmode; |
2136 | sbi->s_dmode = uopt.dmode; | |
6c79e987 | 2137 | sbi->s_nls_map = uopt.nls_map; |
c03cad24 | 2138 | rwlock_init(&sbi->s_cred_lock); |
1da177e4 | 2139 | |
cb00ea35 | 2140 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 2141 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 2142 | else |
6c79e987 | 2143 | sbi->s_session = uopt.session; |
1da177e4 | 2144 | |
6c79e987 | 2145 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 2146 | |
40346005 JK |
2147 | /* Fill in the rest of the superblock */ |
2148 | sb->s_op = &udf_sb_ops; | |
2149 | sb->s_export_op = &udf_export_ops; | |
123e9caf | 2150 | |
40346005 JK |
2151 | sb->s_magic = UDF_SUPER_MAGIC; |
2152 | sb->s_time_gran = 1000; | |
2153 | ||
1197e4df | 2154 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { |
40346005 | 2155 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 2156 | } else { |
e1defc4f | 2157 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); |
70f16cef | 2158 | while (uopt.blocksize <= 4096) { |
40346005 | 2159 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
70f16cef FF |
2160 | if (ret < 0) { |
2161 | if (!silent && ret != -EACCES) { | |
fcbf7637 | 2162 | pr_notice("Scanning with blocksize %u failed\n", |
70f16cef FF |
2163 | uopt.blocksize); |
2164 | } | |
2165 | brelse(sbi->s_lvid_bh); | |
2166 | sbi->s_lvid_bh = NULL; | |
2167 | /* | |
2168 | * EACCES is special - we want to propagate to | |
2169 | * upper layers that we cannot handle RW mount. | |
2170 | */ | |
2171 | if (ret == -EACCES) | |
2172 | break; | |
2173 | } else | |
2174 | break; | |
2175 | ||
2176 | uopt.blocksize <<= 1; | |
1197e4df | 2177 | } |
1da177e4 | 2178 | } |
d759bfa4 JK |
2179 | if (ret < 0) { |
2180 | if (ret == -EAGAIN) { | |
2181 | udf_warn(sb, "No partition found (1)\n"); | |
2182 | ret = -EINVAL; | |
2183 | } | |
1da177e4 LT |
2184 | goto error_out; |
2185 | } | |
2186 | ||
fcbf7637 | 2187 | udf_debug("Lastblock=%u\n", sbi->s_last_block); |
1da177e4 | 2188 | |
6c79e987 | 2189 | if (sbi->s_lvid_bh) { |
4b11111a | 2190 | struct logicalVolIntegrityDescImpUse *lvidiu = |
69d75671 JK |
2191 | udf_sb_lvidiu(sb); |
2192 | uint16_t minUDFReadRev; | |
2193 | uint16_t minUDFWriteRev; | |
1da177e4 | 2194 | |
69d75671 JK |
2195 | if (!lvidiu) { |
2196 | ret = -EINVAL; | |
2197 | goto error_out; | |
2198 | } | |
2199 | minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); | |
2200 | minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
cb00ea35 | 2201 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
78ace70c | 2202 | udf_err(sb, "minUDFReadRev=%x (max is %x)\n", |
69d75671 | 2203 | minUDFReadRev, |
78ace70c | 2204 | UDF_MAX_READ_VERSION); |
d759bfa4 | 2205 | ret = -EINVAL; |
1da177e4 | 2206 | goto error_out; |
e729eac6 | 2207 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION && |
bc98a42c | 2208 | !sb_rdonly(sb)) { |
e729eac6 JK |
2209 | ret = -EACCES; |
2210 | goto error_out; | |
2211 | } | |
1da177e4 | 2212 | |
6c79e987 | 2213 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
2214 | |
2215 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
2216 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
2217 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
2218 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
2219 | } | |
2220 | ||
6c79e987 | 2221 | if (!sbi->s_partitions) { |
78ace70c | 2222 | udf_warn(sb, "No partition found (2)\n"); |
d759bfa4 | 2223 | ret = -EINVAL; |
1da177e4 LT |
2224 | goto error_out; |
2225 | } | |
2226 | ||
4b11111a | 2227 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
e729eac6 | 2228 | UDF_PART_FLAG_READ_ONLY && |
bc98a42c | 2229 | !sb_rdonly(sb)) { |
e729eac6 JK |
2230 | ret = -EACCES; |
2231 | goto error_out; | |
c1a26e7d | 2232 | } |
39b3f6d6 | 2233 | |
cb00ea35 | 2234 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
78ace70c | 2235 | udf_warn(sb, "No fileset found\n"); |
d759bfa4 | 2236 | ret = -EINVAL; |
1da177e4 LT |
2237 | goto error_out; |
2238 | } | |
2239 | ||
cb00ea35 | 2240 | if (!silent) { |
5ca4e4be | 2241 | struct timestamp ts; |
56774805 | 2242 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); |
78ace70c JP |
2243 | udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
2244 | sbi->s_volume_ident, | |
2245 | le16_to_cpu(ts.year), ts.month, ts.day, | |
56774805 | 2246 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); |
1da177e4 | 2247 | } |
bc98a42c | 2248 | if (!sb_rdonly(sb)) { |
1da177e4 | 2249 | udf_open_lvid(sb); |
9181f8bf JK |
2250 | lvid_open = true; |
2251 | } | |
1da177e4 LT |
2252 | |
2253 | /* Assign the root inode */ | |
2254 | /* assign inodes by physical block number */ | |
2255 | /* perhaps it's not extensible enough, but for now ... */ | |
97e961fd | 2256 | inode = udf_iget(sb, &rootdir); |
6d3d5e86 | 2257 | if (IS_ERR(inode)) { |
fcbf7637 | 2258 | udf_err(sb, "Error in udf_iget, block=%u, partition=%u\n", |
cb00ea35 | 2259 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
6d3d5e86 | 2260 | ret = PTR_ERR(inode); |
1da177e4 LT |
2261 | goto error_out; |
2262 | } | |
2263 | ||
2264 | /* Allocate a dentry for the root inode */ | |
48fde701 | 2265 | sb->s_root = d_make_root(inode); |
cb00ea35 | 2266 | if (!sb->s_root) { |
78ace70c | 2267 | udf_err(sb, "Couldn't allocate root dentry\n"); |
d759bfa4 | 2268 | ret = -ENOMEM; |
1da177e4 LT |
2269 | goto error_out; |
2270 | } | |
31170b6a | 2271 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
8de52778 | 2272 | sb->s_max_links = UDF_MAX_LINKS; |
1da177e4 LT |
2273 | return 0; |
2274 | ||
28de7948 | 2275 | error_out: |
0d454e4a | 2276 | iput(sbi->s_vat_inode); |
fdf2657b | 2277 | parse_options_failure: |
785dffe1 CX |
2278 | if (uopt.nls_map) |
2279 | unload_nls(uopt.nls_map); | |
9181f8bf | 2280 | if (lvid_open) |
1da177e4 | 2281 | udf_close_lvid(sb); |
6c79e987 | 2282 | brelse(sbi->s_lvid_bh); |
bff943af | 2283 | udf_sb_free_partitions(sb); |
1da177e4 LT |
2284 | kfree(sbi); |
2285 | sb->s_fs_info = NULL; | |
28de7948 | 2286 | |
d759bfa4 | 2287 | return ret; |
1da177e4 LT |
2288 | } |
2289 | ||
8076c363 JP |
2290 | void _udf_err(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 | ||
1da177e4 | 2296 | va_start(args, fmt); |
c2bff36c JP |
2297 | |
2298 | vaf.fmt = fmt; | |
2299 | vaf.va = &args; | |
2300 | ||
2301 | pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2302 | ||
1da177e4 | 2303 | va_end(args); |
1da177e4 LT |
2304 | } |
2305 | ||
a40ecd7b JP |
2306 | void _udf_warn(struct super_block *sb, const char *function, |
2307 | const char *fmt, ...) | |
1da177e4 | 2308 | { |
c2bff36c | 2309 | struct va_format vaf; |
1da177e4 LT |
2310 | va_list args; |
2311 | ||
cb00ea35 | 2312 | va_start(args, fmt); |
c2bff36c JP |
2313 | |
2314 | vaf.fmt = fmt; | |
2315 | vaf.va = &args; | |
2316 | ||
2317 | pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2318 | ||
1da177e4 | 2319 | va_end(args); |
1da177e4 LT |
2320 | } |
2321 | ||
cb00ea35 | 2322 | static void udf_put_super(struct super_block *sb) |
1da177e4 | 2323 | { |
6c79e987 | 2324 | struct udf_sb_info *sbi; |
1da177e4 | 2325 | |
6c79e987 | 2326 | sbi = UDF_SB(sb); |
6cfd0148 | 2327 | |
0d454e4a | 2328 | iput(sbi->s_vat_inode); |
1da177e4 | 2329 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) |
6c79e987 | 2330 | unload_nls(sbi->s_nls_map); |
bc98a42c | 2331 | if (!sb_rdonly(sb)) |
1da177e4 | 2332 | udf_close_lvid(sb); |
6c79e987 | 2333 | brelse(sbi->s_lvid_bh); |
bff943af | 2334 | udf_sb_free_partitions(sb); |
bbe48dd8 | 2335 | mutex_destroy(&sbi->s_alloc_mutex); |
1da177e4 LT |
2336 | kfree(sb->s_fs_info); |
2337 | sb->s_fs_info = NULL; | |
2338 | } | |
2339 | ||
146bca72 JK |
2340 | static int udf_sync_fs(struct super_block *sb, int wait) |
2341 | { | |
2342 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2343 | ||
2344 | mutex_lock(&sbi->s_alloc_mutex); | |
2345 | if (sbi->s_lvid_dirty) { | |
2346 | /* | |
2347 | * Blockdevice will be synced later so we don't have to submit | |
2348 | * the buffer for IO | |
2349 | */ | |
2350 | mark_buffer_dirty(sbi->s_lvid_bh); | |
146bca72 JK |
2351 | sbi->s_lvid_dirty = 0; |
2352 | } | |
2353 | mutex_unlock(&sbi->s_alloc_mutex); | |
2354 | ||
2355 | return 0; | |
2356 | } | |
2357 | ||
cb00ea35 | 2358 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2359 | { |
726c3342 | 2360 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
2361 | struct udf_sb_info *sbi = UDF_SB(sb); |
2362 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
557f5a14 | 2363 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
6c79e987 | 2364 | |
69d75671 | 2365 | lvidiu = udf_sb_lvidiu(sb); |
1da177e4 LT |
2366 | buf->f_type = UDF_SUPER_MAGIC; |
2367 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 2368 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
2369 | buf->f_bfree = udf_count_free(sb); |
2370 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
2371 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
2372 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
2373 | + buf->f_bfree; | |
1da177e4 | 2374 | buf->f_ffree = buf->f_bfree; |
9fba7056 | 2375 | buf->f_namelen = UDF_NAME_LEN; |
557f5a14 CL |
2376 | buf->f_fsid.val[0] = (u32)id; |
2377 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
2378 | |
2379 | return 0; | |
2380 | } | |
2381 | ||
4b11111a MS |
2382 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
2383 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
2384 | { |
2385 | struct buffer_head *bh = NULL; | |
2386 | unsigned int accum = 0; | |
2387 | int index; | |
b490bdd6 | 2388 | udf_pblk_t block = 0, newblock; |
5ca4e4be | 2389 | struct kernel_lb_addr loc; |
1da177e4 | 2390 | uint32_t bytes; |
1da177e4 LT |
2391 | uint8_t *ptr; |
2392 | uint16_t ident; | |
2393 | struct spaceBitmapDesc *bm; | |
2394 | ||
1da177e4 | 2395 | loc.logicalBlockNum = bitmap->s_extPosition; |
6c79e987 | 2396 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
97e961fd | 2397 | bh = udf_read_ptagged(sb, &loc, 0, &ident); |
1da177e4 | 2398 | |
cb00ea35 | 2399 | if (!bh) { |
78ace70c | 2400 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 | 2401 | goto out; |
cb00ea35 | 2402 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 2403 | brelse(bh); |
78ace70c | 2404 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 LT |
2405 | goto out; |
2406 | } | |
2407 | ||
2408 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2409 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
2410 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
2411 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 2412 | |
cb00ea35 | 2413 | while (bytes > 0) { |
01b954a3 MS |
2414 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
2415 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2416 | cur_bytes * 8); | |
2417 | bytes -= cur_bytes; | |
cb00ea35 | 2418 | if (bytes) { |
3bf25cb4 | 2419 | brelse(bh); |
97e961fd | 2420 | newblock = udf_get_lb_pblock(sb, &loc, ++block); |
1da177e4 | 2421 | bh = udf_tread(sb, newblock); |
cb00ea35 | 2422 | if (!bh) { |
1da177e4 LT |
2423 | udf_debug("read failed\n"); |
2424 | goto out; | |
2425 | } | |
2426 | index = 0; | |
28de7948 | 2427 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2428 | } |
2429 | } | |
3bf25cb4 | 2430 | brelse(bh); |
28de7948 | 2431 | out: |
1da177e4 LT |
2432 | return accum; |
2433 | } | |
2434 | ||
4b11111a MS |
2435 | static unsigned int udf_count_free_table(struct super_block *sb, |
2436 | struct inode *table) | |
1da177e4 LT |
2437 | { |
2438 | unsigned int accum = 0; | |
ff116fc8 | 2439 | uint32_t elen; |
5ca4e4be | 2440 | struct kernel_lb_addr eloc; |
1da177e4 | 2441 | int8_t etype; |
ff116fc8 | 2442 | struct extent_position epos; |
1da177e4 | 2443 | |
d1668fe3 | 2444 | mutex_lock(&UDF_SB(sb)->s_alloc_mutex); |
c0b34438 | 2445 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2446 | epos.offset = sizeof(struct unallocSpaceEntry); |
2447 | epos.bh = NULL; | |
1da177e4 | 2448 | |
3a71fc5d | 2449 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2450 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2451 | |
3bf25cb4 | 2452 | brelse(epos.bh); |
d1668fe3 | 2453 | mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); |
1da177e4 LT |
2454 | |
2455 | return accum; | |
2456 | } | |
cb00ea35 CG |
2457 | |
2458 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2459 | { |
2460 | unsigned int accum = 0; | |
6c79e987 MS |
2461 | struct udf_sb_info *sbi; |
2462 | struct udf_part_map *map; | |
1da177e4 | 2463 | |
6c79e987 MS |
2464 | sbi = UDF_SB(sb); |
2465 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2466 | struct logicalVolIntegrityDesc *lvid = |
2467 | (struct logicalVolIntegrityDesc *) | |
2468 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2469 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2470 | accum = le32_to_cpu( |
2471 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2472 | if (accum == 0xFFFFFFFF) |
2473 | accum = 0; | |
2474 | } | |
2475 | } | |
2476 | ||
2477 | if (accum) | |
2478 | return accum; | |
2479 | ||
6c79e987 MS |
2480 | map = &sbi->s_partmaps[sbi->s_partition]; |
2481 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2482 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2483 | map->s_uspace.s_bitmap); |
1da177e4 | 2484 | } |
6c79e987 | 2485 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
28de7948 | 2486 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2487 | map->s_fspace.s_bitmap); |
1da177e4 LT |
2488 | } |
2489 | if (accum) | |
2490 | return accum; | |
2491 | ||
6c79e987 | 2492 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2493 | accum += udf_count_free_table(sb, |
6c79e987 | 2494 | map->s_uspace.s_table); |
1da177e4 | 2495 | } |
6c79e987 | 2496 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
28de7948 | 2497 | accum += udf_count_free_table(sb, |
6c79e987 | 2498 | map->s_fspace.s_table); |
1da177e4 LT |
2499 | } |
2500 | ||
2501 | return accum; | |
2502 | } | |
54bb60d5 FF |
2503 | |
2504 | MODULE_AUTHOR("Ben Fennema"); | |
2505 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); | |
2506 | MODULE_LICENSE("GPL"); | |
2507 | module_init(init_udf_fs) | |
2508 | module_exit(exit_udf_fs) |