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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 | ||
a78bb383 | 164 | static void udf_free_in_core_inode(struct inode *inode) |
1da177e4 LT |
165 | { |
166 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); | |
167 | } | |
168 | ||
51cc5068 | 169 | static void init_once(void *foo) |
1da177e4 | 170 | { |
cb00ea35 | 171 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 172 | |
a35afb83 CL |
173 | ei->i_ext.i_data = NULL; |
174 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
175 | } |
176 | ||
53ea18de | 177 | static int __init init_inodecache(void) |
1da177e4 LT |
178 | { |
179 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
180 | sizeof(struct udf_inode_info), | |
cb00ea35 | 181 | 0, (SLAB_RECLAIM_ACCOUNT | |
5d097056 VD |
182 | SLAB_MEM_SPREAD | |
183 | SLAB_ACCOUNT), | |
20c2df83 | 184 | init_once); |
28de7948 | 185 | if (!udf_inode_cachep) |
1da177e4 LT |
186 | return -ENOMEM; |
187 | return 0; | |
188 | } | |
189 | ||
190 | static void destroy_inodecache(void) | |
191 | { | |
8c0a8537 KS |
192 | /* |
193 | * Make sure all delayed rcu free inodes are flushed before we | |
194 | * destroy cache. | |
195 | */ | |
196 | rcu_barrier(); | |
1a1d92c1 | 197 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
198 | } |
199 | ||
200 | /* Superblock operations */ | |
ee9b6d61 | 201 | static const struct super_operations udf_sb_ops = { |
28de7948 | 202 | .alloc_inode = udf_alloc_inode, |
a78bb383 | 203 | .free_inode = udf_free_in_core_inode, |
28de7948 | 204 | .write_inode = udf_write_inode, |
3aac2b62 | 205 | .evict_inode = udf_evict_inode, |
28de7948 | 206 | .put_super = udf_put_super, |
146bca72 | 207 | .sync_fs = udf_sync_fs, |
28de7948 CG |
208 | .statfs = udf_statfs, |
209 | .remount_fs = udf_remount_fs, | |
6da80894 | 210 | .show_options = udf_show_options, |
1da177e4 LT |
211 | }; |
212 | ||
cb00ea35 | 213 | struct udf_options { |
1da177e4 LT |
214 | unsigned char novrs; |
215 | unsigned int blocksize; | |
216 | unsigned int session; | |
217 | unsigned int lastblock; | |
218 | unsigned int anchor; | |
1da177e4 | 219 | unsigned int flags; |
faa17292 | 220 | umode_t umask; |
c2ba138a EB |
221 | kgid_t gid; |
222 | kuid_t uid; | |
faa17292 AV |
223 | umode_t fmode; |
224 | umode_t dmode; | |
1da177e4 LT |
225 | struct nls_table *nls_map; |
226 | }; | |
227 | ||
228 | static int __init init_udf_fs(void) | |
229 | { | |
230 | int err; | |
28de7948 | 231 | |
1da177e4 LT |
232 | err = init_inodecache(); |
233 | if (err) | |
234 | goto out1; | |
235 | err = register_filesystem(&udf_fstype); | |
236 | if (err) | |
237 | goto out; | |
28de7948 | 238 | |
1da177e4 | 239 | return 0; |
28de7948 CG |
240 | |
241 | out: | |
1da177e4 | 242 | destroy_inodecache(); |
28de7948 CG |
243 | |
244 | out1: | |
1da177e4 LT |
245 | return err; |
246 | } | |
247 | ||
248 | static void __exit exit_udf_fs(void) | |
249 | { | |
250 | unregister_filesystem(&udf_fstype); | |
251 | destroy_inodecache(); | |
252 | } | |
253 | ||
dc5d39be MS |
254 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
255 | { | |
256 | struct udf_sb_info *sbi = UDF_SB(sb); | |
257 | ||
033c9da0 | 258 | sbi->s_partmaps = kcalloc(count, sizeof(*sbi->s_partmaps), GFP_KERNEL); |
dc5d39be | 259 | if (!sbi->s_partmaps) { |
dc5d39be MS |
260 | sbi->s_partitions = 0; |
261 | return -ENOMEM; | |
262 | } | |
263 | ||
264 | sbi->s_partitions = count; | |
265 | return 0; | |
266 | } | |
267 | ||
bff943af JK |
268 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
269 | { | |
270 | int i; | |
271 | int nr_groups = bitmap->s_nr_groups; | |
bff943af JK |
272 | |
273 | for (i = 0; i < nr_groups; i++) | |
274 | if (bitmap->s_block_bitmap[i]) | |
275 | brelse(bitmap->s_block_bitmap[i]); | |
276 | ||
1d5cfdb0 | 277 | kvfree(bitmap); |
bff943af JK |
278 | } |
279 | ||
280 | static void udf_free_partition(struct udf_part_map *map) | |
281 | { | |
282 | int i; | |
283 | struct udf_meta_data *mdata; | |
284 | ||
285 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
286 | iput(map->s_uspace.s_table); | |
bff943af JK |
287 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) |
288 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
bff943af JK |
289 | if (map->s_partition_type == UDF_SPARABLE_MAP15) |
290 | for (i = 0; i < 4; i++) | |
291 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
292 | else if (map->s_partition_type == UDF_METADATA_MAP25) { | |
293 | mdata = &map->s_type_specific.s_metadata; | |
294 | iput(mdata->s_metadata_fe); | |
295 | mdata->s_metadata_fe = NULL; | |
296 | ||
297 | iput(mdata->s_mirror_fe); | |
298 | mdata->s_mirror_fe = NULL; | |
299 | ||
300 | iput(mdata->s_bitmap_fe); | |
301 | mdata->s_bitmap_fe = NULL; | |
302 | } | |
303 | } | |
304 | ||
305 | static void udf_sb_free_partitions(struct super_block *sb) | |
306 | { | |
307 | struct udf_sb_info *sbi = UDF_SB(sb); | |
308 | int i; | |
ba2eb866 ME |
309 | |
310 | if (!sbi->s_partmaps) | |
1b1baff6 | 311 | return; |
bff943af JK |
312 | for (i = 0; i < sbi->s_partitions; i++) |
313 | udf_free_partition(&sbi->s_partmaps[i]); | |
314 | kfree(sbi->s_partmaps); | |
315 | sbi->s_partmaps = NULL; | |
316 | } | |
317 | ||
34c80b1d | 318 | static int udf_show_options(struct seq_file *seq, struct dentry *root) |
6da80894 | 319 | { |
34c80b1d | 320 | struct super_block *sb = root->d_sb; |
6da80894 MS |
321 | struct udf_sb_info *sbi = UDF_SB(sb); |
322 | ||
323 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
324 | seq_puts(seq, ",nostrict"); | |
1197e4df | 325 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) |
6da80894 MS |
326 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); |
327 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
328 | seq_puts(seq, ",unhide"); | |
329 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
330 | seq_puts(seq, ",undelete"); | |
331 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
332 | seq_puts(seq, ",noadinicb"); | |
333 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
334 | seq_puts(seq, ",shortad"); | |
335 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
336 | seq_puts(seq, ",uid=forget"); | |
6da80894 MS |
337 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) |
338 | seq_puts(seq, ",gid=forget"); | |
6da80894 | 339 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) |
c2ba138a | 340 | seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid)); |
6da80894 | 341 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) |
c2ba138a | 342 | seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid)); |
6da80894 | 343 | if (sbi->s_umask != 0) |
faa17292 | 344 | seq_printf(seq, ",umask=%ho", sbi->s_umask); |
87bc730c | 345 | if (sbi->s_fmode != UDF_INVALID_MODE) |
faa17292 | 346 | seq_printf(seq, ",mode=%ho", sbi->s_fmode); |
87bc730c | 347 | if (sbi->s_dmode != UDF_INVALID_MODE) |
faa17292 | 348 | seq_printf(seq, ",dmode=%ho", sbi->s_dmode); |
6da80894 | 349 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) |
fcbf7637 | 350 | seq_printf(seq, ",session=%d", sbi->s_session); |
6da80894 MS |
351 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) |
352 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
40346005 JK |
353 | if (sbi->s_anchor != 0) |
354 | seq_printf(seq, ",anchor=%u", sbi->s_anchor); | |
6da80894 MS |
355 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) |
356 | seq_puts(seq, ",utf8"); | |
357 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
358 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
359 | ||
360 | return 0; | |
361 | } | |
362 | ||
1da177e4 LT |
363 | /* |
364 | * udf_parse_options | |
365 | * | |
366 | * PURPOSE | |
367 | * Parse mount options. | |
368 | * | |
369 | * DESCRIPTION | |
370 | * The following mount options are supported: | |
371 | * | |
372 | * gid= Set the default group. | |
373 | * umask= Set the default umask. | |
7ac9bcd5 MS |
374 | * mode= Set the default file permissions. |
375 | * dmode= Set the default directory permissions. | |
1da177e4 LT |
376 | * uid= Set the default user. |
377 | * bs= Set the block size. | |
378 | * unhide Show otherwise hidden files. | |
379 | * undelete Show deleted files in lists. | |
380 | * adinicb Embed data in the inode (default) | |
381 | * noadinicb Don't embed data in the inode | |
382 | * shortad Use short ad's | |
383 | * longad Use long ad's (default) | |
384 | * nostrict Unset strict conformance | |
385 | * iocharset= Set the NLS character set | |
386 | * | |
387 | * The remaining are for debugging and disaster recovery: | |
388 | * | |
28de7948 | 389 | * novrs Skip volume sequence recognition |
1da177e4 LT |
390 | * |
391 | * The following expect a offset from 0. | |
392 | * | |
393 | * session= Set the CDROM session (default= last session) | |
394 | * anchor= Override standard anchor location. (default= 256) | |
395 | * volume= Override the VolumeDesc location. (unused) | |
396 | * partition= Override the PartitionDesc location. (unused) | |
397 | * lastblock= Set the last block of the filesystem/ | |
398 | * | |
399 | * The following expect a offset from the partition root. | |
400 | * | |
401 | * fileset= Override the fileset block location. (unused) | |
402 | * rootdir= Override the root directory location. (unused) | |
403 | * WARNING: overriding the rootdir to a non-directory may | |
404 | * yield highly unpredictable results. | |
405 | * | |
406 | * PRE-CONDITIONS | |
407 | * options Pointer to mount options string. | |
408 | * uopts Pointer to mount options variable. | |
409 | * | |
410 | * POST-CONDITIONS | |
411 | * <return> 1 Mount options parsed okay. | |
412 | * <return> 0 Error parsing mount options. | |
413 | * | |
414 | * HISTORY | |
415 | * July 1, 1997 - Andrew E. Mileski | |
416 | * Written, tested, and released. | |
417 | */ | |
28de7948 | 418 | |
1da177e4 LT |
419 | enum { |
420 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
421 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
422 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
423 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
424 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
7ac9bcd5 MS |
425 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, |
426 | Opt_fmode, Opt_dmode | |
1da177e4 LT |
427 | }; |
428 | ||
a447c093 | 429 | static const match_table_t tokens = { |
28de7948 CG |
430 | {Opt_novrs, "novrs"}, |
431 | {Opt_nostrict, "nostrict"}, | |
432 | {Opt_bs, "bs=%u"}, | |
433 | {Opt_unhide, "unhide"}, | |
434 | {Opt_undelete, "undelete"}, | |
435 | {Opt_noadinicb, "noadinicb"}, | |
436 | {Opt_adinicb, "adinicb"}, | |
437 | {Opt_shortad, "shortad"}, | |
438 | {Opt_longad, "longad"}, | |
439 | {Opt_uforget, "uid=forget"}, | |
440 | {Opt_uignore, "uid=ignore"}, | |
441 | {Opt_gforget, "gid=forget"}, | |
442 | {Opt_gignore, "gid=ignore"}, | |
443 | {Opt_gid, "gid=%u"}, | |
444 | {Opt_uid, "uid=%u"}, | |
445 | {Opt_umask, "umask=%o"}, | |
446 | {Opt_session, "session=%u"}, | |
447 | {Opt_lastblock, "lastblock=%u"}, | |
448 | {Opt_anchor, "anchor=%u"}, | |
449 | {Opt_volume, "volume=%u"}, | |
450 | {Opt_partition, "partition=%u"}, | |
451 | {Opt_fileset, "fileset=%u"}, | |
452 | {Opt_rootdir, "rootdir=%u"}, | |
453 | {Opt_utf8, "utf8"}, | |
454 | {Opt_iocharset, "iocharset=%s"}, | |
7ac9bcd5 MS |
455 | {Opt_fmode, "mode=%o"}, |
456 | {Opt_dmode, "dmode=%o"}, | |
28de7948 | 457 | {Opt_err, NULL} |
1da177e4 LT |
458 | }; |
459 | ||
6da80894 MS |
460 | static int udf_parse_options(char *options, struct udf_options *uopt, |
461 | bool remount) | |
1da177e4 LT |
462 | { |
463 | char *p; | |
464 | int option; | |
465 | ||
466 | uopt->novrs = 0; | |
1da177e4 LT |
467 | uopt->session = 0xFFFFFFFF; |
468 | uopt->lastblock = 0; | |
469 | uopt->anchor = 0; | |
1da177e4 LT |
470 | |
471 | if (!options) | |
472 | return 1; | |
473 | ||
cb00ea35 | 474 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
475 | substring_t args[MAX_OPT_ARGS]; |
476 | int token; | |
8c6915ae | 477 | unsigned n; |
1da177e4 LT |
478 | if (!*p) |
479 | continue; | |
480 | ||
481 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
482 | switch (token) { |
483 | case Opt_novrs: | |
484 | uopt->novrs = 1; | |
4136801a | 485 | break; |
cb00ea35 CG |
486 | case Opt_bs: |
487 | if (match_int(&args[0], &option)) | |
488 | return 0; | |
8c6915ae FF |
489 | n = option; |
490 | if (n != 512 && n != 1024 && n != 2048 && n != 4096) | |
491 | return 0; | |
492 | uopt->blocksize = n; | |
1197e4df | 493 | uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); |
cb00ea35 CG |
494 | break; |
495 | case Opt_unhide: | |
496 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
497 | break; | |
498 | case Opt_undelete: | |
499 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
500 | break; | |
501 | case Opt_noadinicb: | |
502 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
503 | break; | |
504 | case Opt_adinicb: | |
505 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
506 | break; | |
507 | case Opt_shortad: | |
508 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
509 | break; | |
510 | case Opt_longad: | |
511 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
512 | break; | |
513 | case Opt_gid: | |
514 | if (match_int(args, &option)) | |
515 | return 0; | |
c2ba138a EB |
516 | uopt->gid = make_kgid(current_user_ns(), option); |
517 | if (!gid_valid(uopt->gid)) | |
518 | return 0; | |
ca76d2d8 | 519 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
520 | break; |
521 | case Opt_uid: | |
522 | if (match_int(args, &option)) | |
523 | return 0; | |
c2ba138a EB |
524 | uopt->uid = make_kuid(current_user_ns(), option); |
525 | if (!uid_valid(uopt->uid)) | |
526 | return 0; | |
ca76d2d8 | 527 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
528 | break; |
529 | case Opt_umask: | |
530 | if (match_octal(args, &option)) | |
531 | return 0; | |
532 | uopt->umask = option; | |
533 | break; | |
534 | case Opt_nostrict: | |
535 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
536 | break; | |
537 | case Opt_session: | |
538 | if (match_int(args, &option)) | |
539 | return 0; | |
540 | uopt->session = option; | |
6da80894 MS |
541 | if (!remount) |
542 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
543 | break; |
544 | case Opt_lastblock: | |
545 | if (match_int(args, &option)) | |
546 | return 0; | |
547 | uopt->lastblock = option; | |
6da80894 MS |
548 | if (!remount) |
549 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
550 | break; |
551 | case Opt_anchor: | |
552 | if (match_int(args, &option)) | |
553 | return 0; | |
554 | uopt->anchor = option; | |
555 | break; | |
556 | case Opt_volume: | |
cb00ea35 | 557 | case Opt_partition: |
cb00ea35 | 558 | case Opt_fileset: |
cb00ea35 | 559 | case Opt_rootdir: |
f0c4a817 | 560 | /* Ignored (never implemented properly) */ |
cb00ea35 CG |
561 | break; |
562 | case Opt_utf8: | |
563 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
564 | break; | |
cb00ea35 | 565 | case Opt_iocharset: |
785dffe1 CX |
566 | if (!remount) { |
567 | if (uopt->nls_map) | |
568 | unload_nls(uopt->nls_map); | |
a768a9ab JK |
569 | /* |
570 | * load_nls() failure is handled later in | |
571 | * udf_fill_super() after all options are | |
572 | * parsed. | |
573 | */ | |
785dffe1 CX |
574 | uopt->nls_map = load_nls(args[0].from); |
575 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
576 | } | |
cb00ea35 | 577 | break; |
cb00ea35 CG |
578 | case Opt_uforget: |
579 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
580 | break; | |
70260e44 | 581 | case Opt_uignore: |
cb00ea35 | 582 | case Opt_gignore: |
70260e44 | 583 | /* These options are superseeded by uid=<number> */ |
cb00ea35 CG |
584 | break; |
585 | case Opt_gforget: | |
586 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
587 | break; | |
7ac9bcd5 MS |
588 | case Opt_fmode: |
589 | if (match_octal(args, &option)) | |
590 | return 0; | |
591 | uopt->fmode = option & 0777; | |
592 | break; | |
593 | case Opt_dmode: | |
594 | if (match_octal(args, &option)) | |
595 | return 0; | |
596 | uopt->dmode = option & 0777; | |
597 | break; | |
cb00ea35 | 598 | default: |
78ace70c | 599 | pr_err("bad mount option \"%s\" or missing value\n", p); |
1da177e4 LT |
600 | return 0; |
601 | } | |
602 | } | |
603 | return 1; | |
604 | } | |
605 | ||
cb00ea35 | 606 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
607 | { |
608 | struct udf_options uopt; | |
6c79e987 | 609 | struct udf_sb_info *sbi = UDF_SB(sb); |
c79d967d | 610 | int error = 0; |
a9ad01bc JK |
611 | |
612 | if (!(*flags & SB_RDONLY) && UDF_QUERY_FLAG(sb, UDF_FLAG_RW_INCOMPAT)) | |
613 | return -EACCES; | |
1da177e4 | 614 | |
02b9984d | 615 | sync_filesystem(sb); |
e729eac6 | 616 | |
6c79e987 MS |
617 | uopt.flags = sbi->s_flags; |
618 | uopt.uid = sbi->s_uid; | |
619 | uopt.gid = sbi->s_gid; | |
620 | uopt.umask = sbi->s_umask; | |
7ac9bcd5 MS |
621 | uopt.fmode = sbi->s_fmode; |
622 | uopt.dmode = sbi->s_dmode; | |
785dffe1 | 623 | uopt.nls_map = NULL; |
1da177e4 | 624 | |
6da80894 | 625 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
626 | return -EINVAL; |
627 | ||
c03cad24 | 628 | write_lock(&sbi->s_cred_lock); |
6c79e987 MS |
629 | sbi->s_flags = uopt.flags; |
630 | sbi->s_uid = uopt.uid; | |
631 | sbi->s_gid = uopt.gid; | |
632 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
633 | sbi->s_fmode = uopt.fmode; |
634 | sbi->s_dmode = uopt.dmode; | |
c03cad24 | 635 | write_unlock(&sbi->s_cred_lock); |
1da177e4 | 636 | |
1751e8a6 | 637 | if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb)) |
c79d967d CH |
638 | goto out_unlock; |
639 | ||
1751e8a6 | 640 | if (*flags & SB_RDONLY) |
1da177e4 | 641 | udf_close_lvid(sb); |
36350462 | 642 | else |
1da177e4 LT |
643 | udf_open_lvid(sb); |
644 | ||
c79d967d | 645 | out_unlock: |
c79d967d | 646 | return error; |
1da177e4 LT |
647 | } |
648 | ||
40346005 JK |
649 | /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ |
650 | /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
651 | static loff_t udf_check_vsd(struct super_block *sb) | |
1da177e4 LT |
652 | { |
653 | struct volStructDesc *vsd = NULL; | |
44499602 | 654 | loff_t sector = VSD_FIRST_SECTOR_OFFSET; |
1da177e4 LT |
655 | int sectorsize; |
656 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
657 | int nsr02 = 0; |
658 | int nsr03 = 0; | |
6c79e987 | 659 | struct udf_sb_info *sbi; |
1da177e4 | 660 | |
6c79e987 | 661 | sbi = UDF_SB(sb); |
1da177e4 LT |
662 | if (sb->s_blocksize < sizeof(struct volStructDesc)) |
663 | sectorsize = sizeof(struct volStructDesc); | |
664 | else | |
665 | sectorsize = sb->s_blocksize; | |
666 | ||
abdc0eb0 | 667 | sector += (((loff_t)sbi->s_session) << sb->s_blocksize_bits); |
1da177e4 | 668 | |
fcbf7637 | 669 | udf_debug("Starting at sector %u (%lu byte sectors)\n", |
706047a7 SM |
670 | (unsigned int)(sector >> sb->s_blocksize_bits), |
671 | sb->s_blocksize); | |
44499602 PF |
672 | /* Process the sequence (if applicable). The hard limit on the sector |
673 | * offset is arbitrary, hopefully large enough so that all valid UDF | |
674 | * filesystems will be recognised. There is no mention of an upper | |
675 | * bound to the size of the volume recognition area in the standard. | |
676 | * The limit will prevent the code to read all the sectors of a | |
677 | * specially crafted image (like a bluray disc full of CD001 sectors), | |
678 | * potentially causing minutes or even hours of uninterruptible I/O | |
679 | * activity. This actually happened with uninitialised SSD partitions | |
680 | * (all 0xFF) before the check for the limit and all valid IDs were | |
681 | * added */ | |
682 | for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET; | |
683 | sector += sectorsize) { | |
1da177e4 LT |
684 | /* Read a block */ |
685 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
686 | if (!bh) | |
687 | break; | |
688 | ||
689 | /* Look for ISO descriptors */ | |
690 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 691 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 692 | |
44499602 | 693 | if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
3a71fc5d | 694 | VSD_STD_ID_LEN)) { |
cb00ea35 CG |
695 | switch (vsd->structType) { |
696 | case 0: | |
697 | udf_debug("ISO9660 Boot Record found\n"); | |
698 | break; | |
699 | case 1: | |
a983f368 | 700 | udf_debug("ISO9660 Primary Volume Descriptor found\n"); |
cb00ea35 CG |
701 | break; |
702 | case 2: | |
a983f368 | 703 | udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); |
cb00ea35 CG |
704 | break; |
705 | case 3: | |
a983f368 | 706 | udf_debug("ISO9660 Volume Partition Descriptor found\n"); |
cb00ea35 CG |
707 | break; |
708 | case 255: | |
a983f368 | 709 | udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); |
cb00ea35 CG |
710 | break; |
711 | default: | |
712 | udf_debug("ISO9660 VRS (%u) found\n", | |
713 | vsd->structType); | |
714 | break; | |
1da177e4 | 715 | } |
3a71fc5d MS |
716 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
717 | VSD_STD_ID_LEN)) | |
718 | ; /* nothing */ | |
719 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
720 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 721 | brelse(bh); |
1da177e4 | 722 | break; |
3a71fc5d MS |
723 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
724 | VSD_STD_ID_LEN)) | |
1da177e4 | 725 | nsr02 = sector; |
3a71fc5d MS |
726 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
727 | VSD_STD_ID_LEN)) | |
1da177e4 | 728 | nsr03 = sector; |
44499602 PF |
729 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2, |
730 | VSD_STD_ID_LEN)) | |
731 | ; /* nothing */ | |
732 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02, | |
733 | VSD_STD_ID_LEN)) | |
734 | ; /* nothing */ | |
735 | else { | |
736 | /* invalid id : end of volume recognition area */ | |
737 | brelse(bh); | |
738 | break; | |
739 | } | |
3bf25cb4 | 740 | brelse(bh); |
1da177e4 LT |
741 | } |
742 | ||
743 | if (nsr03) | |
744 | return nsr03; | |
745 | else if (nsr02) | |
746 | return nsr02; | |
44499602 PF |
747 | else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) == |
748 | VSD_FIRST_SECTOR_OFFSET) | |
1da177e4 LT |
749 | return -1; |
750 | else | |
751 | return 0; | |
752 | } | |
753 | ||
3a71fc5d | 754 | static int udf_find_fileset(struct super_block *sb, |
5ca4e4be PE |
755 | struct kernel_lb_addr *fileset, |
756 | struct kernel_lb_addr *root) | |
1da177e4 LT |
757 | { |
758 | struct buffer_head *bh = NULL; | |
1da177e4 LT |
759 | uint16_t ident; |
760 | ||
761 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 762 | fileset->partitionReferenceNum != 0xFFFF) { |
97e961fd | 763 | bh = udf_read_ptagged(sb, fileset, 0, &ident); |
1da177e4 | 764 | |
28de7948 | 765 | if (!bh) { |
1da177e4 | 766 | return 1; |
28de7948 | 767 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 768 | brelse(bh); |
1da177e4 LT |
769 | return 1; |
770 | } | |
cb00ea35 | 771 | |
fcbf7637 | 772 | udf_debug("Fileset at block=%u, partition=%u\n", |
cb00ea35 CG |
773 | fileset->logicalBlockNum, |
774 | fileset->partitionReferenceNum); | |
1da177e4 | 775 | |
82c82ab6 | 776 | UDF_SB(sb)->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 777 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 778 | brelse(bh); |
1da177e4 LT |
779 | return 0; |
780 | } | |
781 | return 1; | |
782 | } | |
783 | ||
d759bfa4 JK |
784 | /* |
785 | * Load primary Volume Descriptor Sequence | |
786 | * | |
787 | * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence | |
788 | * should be tried. | |
789 | */ | |
c0eb31ed | 790 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
791 | { |
792 | struct primaryVolDesc *pvoldesc; | |
9293fcfb | 793 | uint8_t *outstr; |
c0eb31ed JK |
794 | struct buffer_head *bh; |
795 | uint16_t ident; | |
d759bfa4 | 796 | int ret = -ENOMEM; |
0220edda DD |
797 | #ifdef UDFFS_DEBUG |
798 | struct timestamp *ts; | |
799 | #endif | |
ba9aadd8 | 800 | |
9293fcfb | 801 | outstr = kmalloc(128, GFP_NOFS); |
ba9aadd8 | 802 | if (!outstr) |
9293fcfb | 803 | return -ENOMEM; |
c0eb31ed JK |
804 | |
805 | bh = udf_read_tagged(sb, block, block, &ident); | |
d759bfa4 JK |
806 | if (!bh) { |
807 | ret = -EAGAIN; | |
ba9aadd8 | 808 | goto out2; |
d759bfa4 | 809 | } |
ba9aadd8 | 810 | |
d759bfa4 JK |
811 | if (ident != TAG_IDENT_PVD) { |
812 | ret = -EIO; | |
813 | goto out_bh; | |
814 | } | |
1da177e4 LT |
815 | |
816 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
817 | ||
0220edda DD |
818 | udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
819 | pvoldesc->recordingDateAndTime); | |
af15a298 | 820 | #ifdef UDFFS_DEBUG |
0220edda DD |
821 | ts = &pvoldesc->recordingDateAndTime; |
822 | udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", | |
823 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, | |
824 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
af15a298 | 825 | #endif |
0220edda | 826 | |
1da177e4 | 827 | |
e966fc8d | 828 | ret = udf_dstrCS0toChar(sb, outstr, 31, pvoldesc->volIdent, 32); |
b54e41f5 JK |
829 | if (ret < 0) { |
830 | strcpy(UDF_SB(sb)->s_volume_ident, "InvalidName"); | |
831 | pr_warn("incorrect volume identification, setting to " | |
832 | "'InvalidName'\n"); | |
833 | } else { | |
834 | strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret); | |
835 | } | |
9293fcfb | 836 | udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident); |
1da177e4 | 837 | |
e966fc8d | 838 | ret = udf_dstrCS0toChar(sb, outstr, 127, pvoldesc->volSetIdent, 128); |
b54e41f5 JK |
839 | if (ret < 0) { |
840 | ret = 0; | |
9293fcfb | 841 | goto out_bh; |
b54e41f5 | 842 | } |
9293fcfb AG |
843 | outstr[ret] = 0; |
844 | udf_debug("volSetIdent[] = '%s'\n", outstr); | |
c0eb31ed | 845 | |
ba9aadd8 | 846 | ret = 0; |
d759bfa4 JK |
847 | out_bh: |
848 | brelse(bh); | |
ba9aadd8 MS |
849 | out2: |
850 | kfree(outstr); | |
ba9aadd8 | 851 | return ret; |
1da177e4 LT |
852 | } |
853 | ||
3080a74e | 854 | struct inode *udf_find_metadata_inode_efe(struct super_block *sb, |
7888824b | 855 | u32 meta_file_loc, u32 partition_ref) |
3080a74e NJ |
856 | { |
857 | struct kernel_lb_addr addr; | |
858 | struct inode *metadata_fe; | |
859 | ||
860 | addr.logicalBlockNum = meta_file_loc; | |
7888824b | 861 | addr.partitionReferenceNum = partition_ref; |
3080a74e | 862 | |
6174c2eb | 863 | metadata_fe = udf_iget_special(sb, &addr); |
3080a74e | 864 | |
6d3d5e86 | 865 | if (IS_ERR(metadata_fe)) { |
3080a74e | 866 | udf_warn(sb, "metadata inode efe not found\n"); |
6d3d5e86 JK |
867 | return metadata_fe; |
868 | } | |
869 | if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { | |
3080a74e NJ |
870 | udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); |
871 | iput(metadata_fe); | |
6d3d5e86 | 872 | return ERR_PTR(-EIO); |
3080a74e NJ |
873 | } |
874 | ||
875 | return metadata_fe; | |
876 | } | |
877 | ||
7888824b AT |
878 | static int udf_load_metadata_files(struct super_block *sb, int partition, |
879 | int type1_index) | |
bfb257a5 JK |
880 | { |
881 | struct udf_sb_info *sbi = UDF_SB(sb); | |
882 | struct udf_part_map *map; | |
883 | struct udf_meta_data *mdata; | |
5ca4e4be | 884 | struct kernel_lb_addr addr; |
6d3d5e86 | 885 | struct inode *fe; |
bfb257a5 JK |
886 | |
887 | map = &sbi->s_partmaps[partition]; | |
888 | mdata = &map->s_type_specific.s_metadata; | |
7888824b | 889 | mdata->s_phys_partition_ref = type1_index; |
bfb257a5 JK |
890 | |
891 | /* metadata address */ | |
fcbf7637 | 892 | udf_debug("Metadata file location: block = %u part = %u\n", |
7888824b | 893 | mdata->s_meta_file_loc, mdata->s_phys_partition_ref); |
bfb257a5 | 894 | |
6d3d5e86 | 895 | fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc, |
7888824b | 896 | mdata->s_phys_partition_ref); |
6d3d5e86 | 897 | if (IS_ERR(fe)) { |
3080a74e | 898 | /* mirror file entry */ |
fcbf7637 | 899 | udf_debug("Mirror metadata file location: block = %u part = %u\n", |
7888824b | 900 | mdata->s_mirror_file_loc, mdata->s_phys_partition_ref); |
bfb257a5 | 901 | |
6d3d5e86 | 902 | fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc, |
7888824b | 903 | mdata->s_phys_partition_ref); |
bfb257a5 | 904 | |
6d3d5e86 | 905 | if (IS_ERR(fe)) { |
3080a74e | 906 | udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); |
6d3d5e86 | 907 | return PTR_ERR(fe); |
3080a74e | 908 | } |
6d3d5e86 JK |
909 | mdata->s_mirror_fe = fe; |
910 | } else | |
911 | mdata->s_metadata_fe = fe; | |
912 | ||
bfb257a5 JK |
913 | |
914 | /* | |
915 | * bitmap file entry | |
916 | * Note: | |
917 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) | |
918 | */ | |
919 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { | |
920 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; | |
7888824b | 921 | addr.partitionReferenceNum = mdata->s_phys_partition_ref; |
bfb257a5 | 922 | |
fcbf7637 | 923 | udf_debug("Bitmap file location: block = %u part = %u\n", |
a983f368 | 924 | addr.logicalBlockNum, addr.partitionReferenceNum); |
bfb257a5 | 925 | |
6174c2eb | 926 | fe = udf_iget_special(sb, &addr); |
6d3d5e86 | 927 | if (IS_ERR(fe)) { |
bc98a42c | 928 | if (sb_rdonly(sb)) |
a40ecd7b | 929 | udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); |
bfb257a5 | 930 | else { |
8076c363 | 931 | udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); |
6d3d5e86 | 932 | return PTR_ERR(fe); |
bfb257a5 | 933 | } |
6d3d5e86 JK |
934 | } else |
935 | mdata->s_bitmap_fe = fe; | |
bfb257a5 JK |
936 | } |
937 | ||
938 | udf_debug("udf_load_metadata_files Ok\n"); | |
bfb257a5 | 939 | return 0; |
bfb257a5 JK |
940 | } |
941 | ||
28de7948 | 942 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
5ca4e4be | 943 | struct kernel_lb_addr *root) |
1da177e4 LT |
944 | { |
945 | struct fileSetDesc *fset; | |
946 | ||
947 | fset = (struct fileSetDesc *)bh->b_data; | |
948 | ||
949 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
950 | ||
6c79e987 | 951 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 952 | |
fcbf7637 | 953 | udf_debug("Rootdir at block=%u, partition=%u\n", |
cb00ea35 | 954 | root->logicalBlockNum, root->partitionReferenceNum); |
1da177e4 LT |
955 | } |
956 | ||
883cb9d1 MS |
957 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
958 | { | |
959 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
960 | return DIV_ROUND_UP(map->s_partition_len + |
961 | (sizeof(struct spaceBitmapDesc) << 3), | |
962 | sb->s_blocksize * 8); | |
883cb9d1 MS |
963 | } |
964 | ||
66e1da3f MS |
965 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
966 | { | |
66e1da3f MS |
967 | struct udf_bitmap *bitmap; |
968 | int nr_groups; | |
969 | int size; | |
970 | ||
883cb9d1 | 971 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
972 | size = sizeof(struct udf_bitmap) + |
973 | (sizeof(struct buffer_head *) * nr_groups); | |
974 | ||
975 | if (size <= PAGE_SIZE) | |
ed2ae6f6 | 976 | bitmap = kzalloc(size, GFP_KERNEL); |
66e1da3f | 977 | else |
ed2ae6f6 | 978 | bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ |
66e1da3f | 979 | |
ba2eb866 | 980 | if (!bitmap) |
66e1da3f | 981 | return NULL; |
66e1da3f | 982 | |
66e1da3f MS |
983 | bitmap->s_nr_groups = nr_groups; |
984 | return bitmap; | |
985 | } | |
986 | ||
b085fbe2 JK |
987 | static int check_partition_desc(struct super_block *sb, |
988 | struct partitionDesc *p, | |
989 | struct udf_part_map *map) | |
990 | { | |
991 | bool umap, utable, fmap, ftable; | |
992 | struct partitionHeaderDesc *phd; | |
993 | ||
994 | switch (le32_to_cpu(p->accessType)) { | |
995 | case PD_ACCESS_TYPE_READ_ONLY: | |
996 | case PD_ACCESS_TYPE_WRITE_ONCE: | |
997 | case PD_ACCESS_TYPE_REWRITABLE: | |
998 | case PD_ACCESS_TYPE_NONE: | |
999 | goto force_ro; | |
1000 | } | |
1001 | ||
1002 | /* No Partition Header Descriptor? */ | |
1003 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
1004 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
1005 | goto force_ro; | |
1006 | ||
1007 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1008 | utable = phd->unallocSpaceTable.extLength; | |
1009 | umap = phd->unallocSpaceBitmap.extLength; | |
1010 | ftable = phd->freedSpaceTable.extLength; | |
1011 | fmap = phd->freedSpaceBitmap.extLength; | |
1012 | ||
1013 | /* No allocation info? */ | |
1014 | if (!utable && !umap && !ftable && !fmap) | |
1015 | goto force_ro; | |
1016 | ||
1017 | /* We don't support blocks that require erasing before overwrite */ | |
1018 | if (ftable || fmap) | |
1019 | goto force_ro; | |
1020 | /* UDF 2.60: 2.3.3 - no mixing of tables & bitmaps, no VAT. */ | |
1021 | if (utable && umap) | |
1022 | goto force_ro; | |
1023 | ||
1024 | if (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
1025 | map->s_partition_type == UDF_VIRTUAL_MAP20) | |
1026 | goto force_ro; | |
1027 | ||
1028 | return 0; | |
1029 | force_ro: | |
1030 | if (!sb_rdonly(sb)) | |
1031 | return -EACCES; | |
1032 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); | |
1033 | return 0; | |
1034 | } | |
1035 | ||
3fb38dfa JK |
1036 | static int udf_fill_partdesc_info(struct super_block *sb, |
1037 | struct partitionDesc *p, int p_index) | |
1da177e4 | 1038 | { |
6c79e987 | 1039 | struct udf_part_map *map; |
165923fa | 1040 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 1041 | struct partitionHeaderDesc *phd; |
b085fbe2 | 1042 | int err; |
165923fa | 1043 | |
3fb38dfa | 1044 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
1045 | |
1046 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
1047 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
1048 | ||
1049 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
1050 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
1051 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
1052 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
1053 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
1054 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
1055 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
1056 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
1057 | ||
fcbf7637 | 1058 | udf_debug("Partition (%d type %x) starts at physical %u, block length %u\n", |
a983f368 JP |
1059 | p_index, map->s_partition_type, |
1060 | map->s_partition_root, map->s_partition_len); | |
165923fa | 1061 | |
b085fbe2 JK |
1062 | err = check_partition_desc(sb, p, map); |
1063 | if (err) | |
1064 | return err; | |
1065 | ||
1066 | /* | |
1067 | * Skip loading allocation info it we cannot ever write to the fs. | |
1068 | * This is a correctness thing as we may have decided to force ro mount | |
1069 | * to avoid allocation info we don't support. | |
1070 | */ | |
1071 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_RW_INCOMPAT)) | |
3fb38dfa | 1072 | return 0; |
165923fa MS |
1073 | |
1074 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1075 | if (phd->unallocSpaceTable.extLength) { | |
5ca4e4be | 1076 | struct kernel_lb_addr loc = { |
165923fa MS |
1077 | .logicalBlockNum = le32_to_cpu( |
1078 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 1079 | .partitionReferenceNum = p_index, |
165923fa | 1080 | }; |
6d3d5e86 | 1081 | struct inode *inode; |
165923fa | 1082 | |
6174c2eb | 1083 | inode = udf_iget_special(sb, &loc); |
6d3d5e86 | 1084 | if (IS_ERR(inode)) { |
165923fa | 1085 | udf_debug("cannot load unallocSpaceTable (part %d)\n", |
a983f368 | 1086 | p_index); |
6d3d5e86 | 1087 | return PTR_ERR(inode); |
165923fa | 1088 | } |
6d3d5e86 | 1089 | map->s_uspace.s_table = inode; |
165923fa | 1090 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; |
fcbf7637 | 1091 | udf_debug("unallocSpaceTable (part %d) @ %lu\n", |
a983f368 | 1092 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1093 | } |
1094 | ||
1095 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1096 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1097 | if (!bitmap) | |
d759bfa4 | 1098 | return -ENOMEM; |
165923fa | 1099 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1100 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1101 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1102 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
fcbf7637 | 1103 | udf_debug("unallocSpaceBitmap (part %d) @ %u\n", |
a983f368 | 1104 | p_index, bitmap->s_extPosition); |
165923fa MS |
1105 | } |
1106 | ||
3fb38dfa JK |
1107 | return 0; |
1108 | } | |
1109 | ||
e971b0b9 JK |
1110 | static void udf_find_vat_block(struct super_block *sb, int p_index, |
1111 | int type1_index, sector_t start_block) | |
38b74a53 JK |
1112 | { |
1113 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1114 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
e971b0b9 | 1115 | sector_t vat_block; |
5ca4e4be | 1116 | struct kernel_lb_addr ino; |
6d3d5e86 | 1117 | struct inode *inode; |
e971b0b9 JK |
1118 | |
1119 | /* | |
1120 | * VAT file entry is in the last recorded block. Some broken disks have | |
1121 | * it a few blocks before so try a bit harder... | |
1122 | */ | |
1123 | ino.partitionReferenceNum = type1_index; | |
1124 | for (vat_block = start_block; | |
1125 | vat_block >= map->s_partition_root && | |
6d3d5e86 | 1126 | vat_block >= start_block - 3; vat_block--) { |
e971b0b9 | 1127 | ino.logicalBlockNum = vat_block - map->s_partition_root; |
6174c2eb | 1128 | inode = udf_iget_special(sb, &ino); |
6d3d5e86 JK |
1129 | if (!IS_ERR(inode)) { |
1130 | sbi->s_vat_inode = inode; | |
1131 | break; | |
1132 | } | |
e971b0b9 JK |
1133 | } |
1134 | } | |
1135 | ||
1136 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) | |
1137 | { | |
1138 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1139 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
fa5e0815 JK |
1140 | struct buffer_head *bh = NULL; |
1141 | struct udf_inode_info *vati; | |
1142 | uint32_t pos; | |
1143 | struct virtualAllocationTable20 *vat20; | |
23bcda11 FF |
1144 | sector_t blocks = i_size_read(sb->s_bdev->bd_inode) >> |
1145 | sb->s_blocksize_bits; | |
38b74a53 | 1146 | |
e971b0b9 | 1147 | udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); |
4bf17af0 JK |
1148 | if (!sbi->s_vat_inode && |
1149 | sbi->s_last_block != blocks - 1) { | |
78ace70c JP |
1150 | pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", |
1151 | (unsigned long)sbi->s_last_block, | |
1152 | (unsigned long)blocks - 1); | |
e971b0b9 | 1153 | udf_find_vat_block(sb, p_index, type1_index, blocks - 1); |
4bf17af0 | 1154 | } |
38b74a53 | 1155 | if (!sbi->s_vat_inode) |
d759bfa4 | 1156 | return -EIO; |
38b74a53 JK |
1157 | |
1158 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
47c9358a | 1159 | map->s_type_specific.s_virtual.s_start_offset = 0; |
38b74a53 JK |
1160 | map->s_type_specific.s_virtual.s_num_entries = |
1161 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1162 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
fa5e0815 JK |
1163 | vati = UDF_I(sbi->s_vat_inode); |
1164 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1165 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1166 | bh = sb_bread(sb, pos); | |
1167 | if (!bh) | |
d759bfa4 | 1168 | return -EIO; |
fa5e0815 JK |
1169 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; |
1170 | } else { | |
1171 | vat20 = (struct virtualAllocationTable20 *) | |
1172 | vati->i_ext.i_data; | |
1173 | } | |
38b74a53 | 1174 | |
38b74a53 | 1175 | map->s_type_specific.s_virtual.s_start_offset = |
47c9358a | 1176 | le16_to_cpu(vat20->lengthHeader); |
38b74a53 JK |
1177 | map->s_type_specific.s_virtual.s_num_entries = |
1178 | (sbi->s_vat_inode->i_size - | |
1179 | map->s_type_specific.s_virtual. | |
1180 | s_start_offset) >> 2; | |
1181 | brelse(bh); | |
1182 | } | |
1183 | return 0; | |
1184 | } | |
1185 | ||
d759bfa4 JK |
1186 | /* |
1187 | * Load partition descriptor block | |
1188 | * | |
1189 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor | |
1190 | * sequence. | |
1191 | */ | |
3fb38dfa JK |
1192 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
1193 | { | |
1194 | struct buffer_head *bh; | |
1195 | struct partitionDesc *p; | |
1196 | struct udf_part_map *map; | |
1197 | struct udf_sb_info *sbi = UDF_SB(sb); | |
38b74a53 | 1198 | int i, type1_idx; |
3fb38dfa JK |
1199 | uint16_t partitionNumber; |
1200 | uint16_t ident; | |
d759bfa4 | 1201 | int ret; |
3fb38dfa JK |
1202 | |
1203 | bh = udf_read_tagged(sb, block, block, &ident); | |
1204 | if (!bh) | |
d759bfa4 JK |
1205 | return -EAGAIN; |
1206 | if (ident != TAG_IDENT_PD) { | |
1207 | ret = 0; | |
3fb38dfa | 1208 | goto out_bh; |
d759bfa4 | 1209 | } |
3fb38dfa JK |
1210 | |
1211 | p = (struct partitionDesc *)bh->b_data; | |
1212 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
38b74a53 | 1213 | |
7888824b | 1214 | /* First scan for TYPE1 and SPARABLE partitions */ |
3fb38dfa JK |
1215 | for (i = 0; i < sbi->s_partitions; i++) { |
1216 | map = &sbi->s_partmaps[i]; | |
fcbf7637 | 1217 | udf_debug("Searching map: (%u == %u)\n", |
3fb38dfa | 1218 | map->s_partition_num, partitionNumber); |
38b74a53 JK |
1219 | if (map->s_partition_num == partitionNumber && |
1220 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1221 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
3fb38dfa JK |
1222 | break; |
1223 | } | |
1224 | ||
38b74a53 | 1225 | if (i >= sbi->s_partitions) { |
fcbf7637 | 1226 | udf_debug("Partition (%u) not found in partition map\n", |
3fb38dfa | 1227 | partitionNumber); |
d759bfa4 | 1228 | ret = 0; |
3fb38dfa JK |
1229 | goto out_bh; |
1230 | } | |
165923fa | 1231 | |
3fb38dfa | 1232 | ret = udf_fill_partdesc_info(sb, p, i); |
d759bfa4 JK |
1233 | if (ret < 0) |
1234 | goto out_bh; | |
38b74a53 JK |
1235 | |
1236 | /* | |
bfb257a5 JK |
1237 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
1238 | * PHYSICAL partitions are already set up | |
38b74a53 JK |
1239 | */ |
1240 | type1_idx = i; | |
44499602 PF |
1241 | #ifdef UDFFS_DEBUG |
1242 | map = NULL; /* supress 'maybe used uninitialized' warning */ | |
1243 | #endif | |
38b74a53 JK |
1244 | for (i = 0; i < sbi->s_partitions; i++) { |
1245 | map = &sbi->s_partmaps[i]; | |
1246 | ||
1247 | if (map->s_partition_num == partitionNumber && | |
1248 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
bfb257a5 JK |
1249 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
1250 | map->s_partition_type == UDF_METADATA_MAP25)) | |
38b74a53 JK |
1251 | break; |
1252 | } | |
1253 | ||
d759bfa4 JK |
1254 | if (i >= sbi->s_partitions) { |
1255 | ret = 0; | |
38b74a53 | 1256 | goto out_bh; |
d759bfa4 | 1257 | } |
38b74a53 JK |
1258 | |
1259 | ret = udf_fill_partdesc_info(sb, p, i); | |
d759bfa4 | 1260 | if (ret < 0) |
38b74a53 JK |
1261 | goto out_bh; |
1262 | ||
bfb257a5 | 1263 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
7888824b | 1264 | ret = udf_load_metadata_files(sb, i, type1_idx); |
d759bfa4 | 1265 | if (ret < 0) { |
78ace70c JP |
1266 | udf_err(sb, "error loading MetaData partition map %d\n", |
1267 | i); | |
bfb257a5 JK |
1268 | goto out_bh; |
1269 | } | |
1270 | } else { | |
e729eac6 JK |
1271 | /* |
1272 | * If we have a partition with virtual map, we don't handle | |
1273 | * writing to it (we overwrite blocks instead of relocating | |
1274 | * them). | |
1275 | */ | |
bc98a42c | 1276 | if (!sb_rdonly(sb)) { |
e729eac6 JK |
1277 | ret = -EACCES; |
1278 | goto out_bh; | |
1279 | } | |
a9ad01bc | 1280 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); |
bfb257a5 | 1281 | ret = udf_load_vat(sb, i, type1_idx); |
d759bfa4 | 1282 | if (ret < 0) |
bfb257a5 | 1283 | goto out_bh; |
bfb257a5 | 1284 | } |
d759bfa4 | 1285 | ret = 0; |
c0eb31ed | 1286 | out_bh: |
2e0838fd | 1287 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1288 | brelse(bh); |
1289 | return ret; | |
1da177e4 LT |
1290 | } |
1291 | ||
1df2ae31 JK |
1292 | static int udf_load_sparable_map(struct super_block *sb, |
1293 | struct udf_part_map *map, | |
1294 | struct sparablePartitionMap *spm) | |
1295 | { | |
1296 | uint32_t loc; | |
1297 | uint16_t ident; | |
1298 | struct sparingTable *st; | |
1299 | struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing; | |
1300 | int i; | |
1301 | struct buffer_head *bh; | |
1302 | ||
1303 | map->s_partition_type = UDF_SPARABLE_MAP15; | |
1304 | sdata->s_packet_len = le16_to_cpu(spm->packetLength); | |
1305 | if (!is_power_of_2(sdata->s_packet_len)) { | |
1306 | udf_err(sb, "error loading logical volume descriptor: " | |
1307 | "Invalid packet length %u\n", | |
1308 | (unsigned)sdata->s_packet_len); | |
1309 | return -EIO; | |
1310 | } | |
1311 | if (spm->numSparingTables > 4) { | |
1312 | udf_err(sb, "error loading logical volume descriptor: " | |
1313 | "Too many sparing tables (%d)\n", | |
1314 | (int)spm->numSparingTables); | |
1315 | return -EIO; | |
1316 | } | |
1317 | ||
1318 | for (i = 0; i < spm->numSparingTables; i++) { | |
1319 | loc = le32_to_cpu(spm->locSparingTable[i]); | |
1320 | bh = udf_read_tagged(sb, loc, loc, &ident); | |
1321 | if (!bh) | |
1322 | continue; | |
1323 | ||
1324 | st = (struct sparingTable *)bh->b_data; | |
1325 | if (ident != 0 || | |
1326 | strncmp(st->sparingIdent.ident, UDF_ID_SPARING, | |
1327 | strlen(UDF_ID_SPARING)) || | |
1328 | sizeof(*st) + le16_to_cpu(st->reallocationTableLen) > | |
1329 | sb->s_blocksize) { | |
1330 | brelse(bh); | |
1331 | continue; | |
1332 | } | |
1333 | ||
1334 | sdata->s_spar_map[i] = bh; | |
1335 | } | |
1336 | map->s_partition_func = udf_get_pblock_spar15; | |
1337 | return 0; | |
1338 | } | |
1339 | ||
c0eb31ed | 1340 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
5ca4e4be | 1341 | struct kernel_lb_addr *fileset) |
1da177e4 LT |
1342 | { |
1343 | struct logicalVolDesc *lvd; | |
1df2ae31 | 1344 | int i, offset; |
1da177e4 | 1345 | uint8_t type; |
6c79e987 | 1346 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1347 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1348 | uint16_t ident; |
1349 | struct buffer_head *bh; | |
adee11b2 | 1350 | unsigned int table_len; |
d759bfa4 | 1351 | int ret; |
1da177e4 | 1352 | |
c0eb31ed JK |
1353 | bh = udf_read_tagged(sb, block, block, &ident); |
1354 | if (!bh) | |
d759bfa4 | 1355 | return -EAGAIN; |
c0eb31ed | 1356 | BUG_ON(ident != TAG_IDENT_LVD); |
1da177e4 | 1357 | lvd = (struct logicalVolDesc *)bh->b_data; |
adee11b2 | 1358 | table_len = le32_to_cpu(lvd->mapTableLength); |
57b9655d | 1359 | if (table_len > sb->s_blocksize - sizeof(*lvd)) { |
adee11b2 JK |
1360 | udf_err(sb, "error loading logical volume descriptor: " |
1361 | "Partition table too long (%u > %lu)\n", table_len, | |
1362 | sb->s_blocksize - sizeof(*lvd)); | |
d759bfa4 | 1363 | ret = -EIO; |
adee11b2 JK |
1364 | goto out_bh; |
1365 | } | |
1da177e4 | 1366 | |
cb14d340 JK |
1367 | ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
1368 | if (ret) | |
c0eb31ed | 1369 | goto out_bh; |
1da177e4 | 1370 | |
cb00ea35 | 1371 | for (i = 0, offset = 0; |
adee11b2 | 1372 | i < sbi->s_partitions && offset < table_len; |
4b11111a MS |
1373 | i++, offset += gpm->partitionMapLength) { |
1374 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1375 | gpm = (struct genericPartitionMap *) | |
1376 | &(lvd->partitionMaps[offset]); | |
1377 | type = gpm->partitionMapType; | |
cb00ea35 | 1378 | if (type == 1) { |
4b11111a MS |
1379 | struct genericPartitionMap1 *gpm1 = |
1380 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1381 | map->s_partition_type = UDF_TYPE1_MAP15; |
1382 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1383 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1384 | map->s_partition_func = NULL; | |
cb00ea35 | 1385 | } else if (type == 2) { |
4b11111a MS |
1386 | struct udfPartitionMap2 *upm2 = |
1387 | (struct udfPartitionMap2 *)gpm; | |
1388 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1389 | strlen(UDF_ID_VIRTUAL))) { | |
1390 | u16 suf = | |
1391 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1392 | identSuffix)[0]); | |
c82a1275 | 1393 | if (suf < 0x0200) { |
4b11111a MS |
1394 | map->s_partition_type = |
1395 | UDF_VIRTUAL_MAP15; | |
1396 | map->s_partition_func = | |
1397 | udf_get_pblock_virt15; | |
c82a1275 | 1398 | } else { |
4b11111a MS |
1399 | map->s_partition_type = |
1400 | UDF_VIRTUAL_MAP20; | |
1401 | map->s_partition_func = | |
1402 | udf_get_pblock_virt20; | |
1da177e4 | 1403 | } |
4b11111a MS |
1404 | } else if (!strncmp(upm2->partIdent.ident, |
1405 | UDF_ID_SPARABLE, | |
1406 | strlen(UDF_ID_SPARABLE))) { | |
d759bfa4 JK |
1407 | ret = udf_load_sparable_map(sb, map, |
1408 | (struct sparablePartitionMap *)gpm); | |
1409 | if (ret < 0) | |
1df2ae31 | 1410 | goto out_bh; |
bfb257a5 JK |
1411 | } else if (!strncmp(upm2->partIdent.ident, |
1412 | UDF_ID_METADATA, | |
1413 | strlen(UDF_ID_METADATA))) { | |
1414 | struct udf_meta_data *mdata = | |
1415 | &map->s_type_specific.s_metadata; | |
1416 | struct metadataPartitionMap *mdm = | |
1417 | (struct metadataPartitionMap *) | |
1418 | &(lvd->partitionMaps[offset]); | |
fcbf7637 | 1419 | udf_debug("Parsing Logical vol part %d type %u id=%s\n", |
a983f368 | 1420 | i, type, UDF_ID_METADATA); |
bfb257a5 JK |
1421 | |
1422 | map->s_partition_type = UDF_METADATA_MAP25; | |
1423 | map->s_partition_func = udf_get_pblock_meta25; | |
1424 | ||
1425 | mdata->s_meta_file_loc = | |
1426 | le32_to_cpu(mdm->metadataFileLoc); | |
1427 | mdata->s_mirror_file_loc = | |
1428 | le32_to_cpu(mdm->metadataMirrorFileLoc); | |
1429 | mdata->s_bitmap_file_loc = | |
1430 | le32_to_cpu(mdm->metadataBitmapFileLoc); | |
1431 | mdata->s_alloc_unit_size = | |
1432 | le32_to_cpu(mdm->allocUnitSize); | |
1433 | mdata->s_align_unit_size = | |
1434 | le16_to_cpu(mdm->alignUnitSize); | |
ed47a7d0 JK |
1435 | if (mdm->flags & 0x01) |
1436 | mdata->s_flags |= MF_DUPLICATE_MD; | |
bfb257a5 JK |
1437 | |
1438 | udf_debug("Metadata Ident suffix=0x%x\n", | |
a983f368 JP |
1439 | le16_to_cpu(*(__le16 *) |
1440 | mdm->partIdent.identSuffix)); | |
fcbf7637 | 1441 | udf_debug("Metadata part num=%u\n", |
a983f368 | 1442 | le16_to_cpu(mdm->partitionNum)); |
fcbf7637 | 1443 | udf_debug("Metadata part alloc unit size=%u\n", |
a983f368 | 1444 | le32_to_cpu(mdm->allocUnitSize)); |
fcbf7637 | 1445 | udf_debug("Metadata file loc=%u\n", |
a983f368 | 1446 | le32_to_cpu(mdm->metadataFileLoc)); |
fcbf7637 | 1447 | udf_debug("Mirror file loc=%u\n", |
a983f368 | 1448 | le32_to_cpu(mdm->metadataMirrorFileLoc)); |
fcbf7637 | 1449 | udf_debug("Bitmap file loc=%u\n", |
a983f368 | 1450 | le32_to_cpu(mdm->metadataBitmapFileLoc)); |
fcbf7637 | 1451 | udf_debug("Flags: %d %u\n", |
ed47a7d0 | 1452 | mdata->s_flags, mdm->flags); |
cb00ea35 | 1453 | } else { |
3a71fc5d MS |
1454 | udf_debug("Unknown ident: %s\n", |
1455 | upm2->partIdent.ident); | |
1da177e4 LT |
1456 | continue; |
1457 | } | |
6c79e987 MS |
1458 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1459 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 | 1460 | } |
fcbf7637 | 1461 | udf_debug("Partition (%d:%u) type %u on volume %u\n", |
a983f368 | 1462 | i, map->s_partition_num, type, map->s_volumeseqnum); |
1da177e4 LT |
1463 | } |
1464 | ||
cb00ea35 | 1465 | if (fileset) { |
5ca4e4be | 1466 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1467 | |
1468 | *fileset = lelb_to_cpu(la->extLocation); | |
fcbf7637 | 1469 | udf_debug("FileSet found in LogicalVolDesc at block=%u, partition=%u\n", |
a983f368 | 1470 | fileset->logicalBlockNum, |
28de7948 | 1471 | fileset->partitionReferenceNum); |
1da177e4 LT |
1472 | } |
1473 | if (lvd->integritySeqExt.extLength) | |
1474 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
d759bfa4 | 1475 | ret = 0; |
4f5edd82 SM |
1476 | |
1477 | if (!sbi->s_lvid_bh) { | |
1478 | /* We can't generate unique IDs without a valid LVID */ | |
1479 | if (sb_rdonly(sb)) { | |
1480 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); | |
1481 | } else { | |
1482 | udf_warn(sb, "Damaged or missing LVID, forcing " | |
1483 | "readonly mount\n"); | |
1484 | ret = -EACCES; | |
1485 | } | |
1486 | } | |
c0eb31ed JK |
1487 | out_bh: |
1488 | brelse(bh); | |
1489 | return ret; | |
1da177e4 LT |
1490 | } |
1491 | ||
1492 | /* | |
a47241cd | 1493 | * Find the prevailing Logical Volume Integrity Descriptor. |
1da177e4 | 1494 | */ |
5ca4e4be | 1495 | static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) |
1da177e4 | 1496 | { |
a47241cd | 1497 | struct buffer_head *bh, *final_bh; |
1da177e4 | 1498 | uint16_t ident; |
6c79e987 MS |
1499 | struct udf_sb_info *sbi = UDF_SB(sb); |
1500 | struct logicalVolIntegrityDesc *lvid; | |
a47241cd AT |
1501 | int indirections = 0; |
1502 | ||
1503 | while (++indirections <= UDF_MAX_LVID_NESTING) { | |
1504 | final_bh = NULL; | |
1505 | while (loc.extLength > 0 && | |
1506 | (bh = udf_read_tagged(sb, loc.extLocation, | |
1507 | loc.extLocation, &ident))) { | |
1508 | if (ident != TAG_IDENT_LVID) { | |
1509 | brelse(bh); | |
1510 | break; | |
1511 | } | |
1512 | ||
1513 | brelse(final_bh); | |
1514 | final_bh = bh; | |
1da177e4 | 1515 | |
a47241cd AT |
1516 | loc.extLength -= sb->s_blocksize; |
1517 | loc.extLocation++; | |
1518 | } | |
cb00ea35 | 1519 | |
a47241cd AT |
1520 | if (!final_bh) |
1521 | return; | |
cb00ea35 | 1522 | |
a47241cd AT |
1523 | brelse(sbi->s_lvid_bh); |
1524 | sbi->s_lvid_bh = final_bh; | |
1525 | ||
1526 | lvid = (struct logicalVolIntegrityDesc *)final_bh->b_data; | |
1527 | if (lvid->nextIntegrityExt.extLength == 0) | |
1528 | return; | |
1529 | ||
1530 | loc = leea_to_cpu(lvid->nextIntegrityExt); | |
1da177e4 | 1531 | } |
a47241cd AT |
1532 | |
1533 | udf_warn(sb, "Too many LVID indirections (max %u), ignoring.\n", | |
1534 | UDF_MAX_LVID_NESTING); | |
1535 | brelse(sbi->s_lvid_bh); | |
1536 | sbi->s_lvid_bh = NULL; | |
1da177e4 LT |
1537 | } |
1538 | ||
7b78fd02 JK |
1539 | /* |
1540 | * Step for reallocation of table of partition descriptor sequence numbers. | |
1541 | * Must be power of 2. | |
1542 | */ | |
1543 | #define PART_DESC_ALLOC_STEP 32 | |
1544 | ||
ee4af50c JK |
1545 | struct part_desc_seq_scan_data { |
1546 | struct udf_vds_record rec; | |
1547 | u32 partnum; | |
1548 | }; | |
1549 | ||
7b78fd02 JK |
1550 | struct desc_seq_scan_data { |
1551 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
1552 | unsigned int size_part_descs; | |
ee4af50c JK |
1553 | unsigned int num_part_descs; |
1554 | struct part_desc_seq_scan_data *part_descs_loc; | |
7b78fd02 JK |
1555 | }; |
1556 | ||
1557 | static struct udf_vds_record *handle_partition_descriptor( | |
1558 | struct buffer_head *bh, | |
1559 | struct desc_seq_scan_data *data) | |
1560 | { | |
1561 | struct partitionDesc *desc = (struct partitionDesc *)bh->b_data; | |
1562 | int partnum; | |
ee4af50c | 1563 | int i; |
7b78fd02 JK |
1564 | |
1565 | partnum = le16_to_cpu(desc->partitionNumber); | |
ee4af50c JK |
1566 | for (i = 0; i < data->num_part_descs; i++) |
1567 | if (partnum == data->part_descs_loc[i].partnum) | |
1568 | return &(data->part_descs_loc[i].rec); | |
1569 | if (data->num_part_descs >= data->size_part_descs) { | |
1570 | struct part_desc_seq_scan_data *new_loc; | |
7b78fd02 JK |
1571 | unsigned int new_size = ALIGN(partnum, PART_DESC_ALLOC_STEP); |
1572 | ||
6396bb22 | 1573 | new_loc = kcalloc(new_size, sizeof(*new_loc), GFP_KERNEL); |
7b78fd02 JK |
1574 | if (!new_loc) |
1575 | return ERR_PTR(-ENOMEM); | |
1576 | memcpy(new_loc, data->part_descs_loc, | |
1577 | data->size_part_descs * sizeof(*new_loc)); | |
1578 | kfree(data->part_descs_loc); | |
1579 | data->part_descs_loc = new_loc; | |
1580 | data->size_part_descs = new_size; | |
1581 | } | |
ee4af50c | 1582 | return &(data->part_descs_loc[data->num_part_descs++].rec); |
7b78fd02 JK |
1583 | } |
1584 | ||
1585 | ||
1586 | static struct udf_vds_record *get_volume_descriptor_record(uint16_t ident, | |
1587 | struct buffer_head *bh, struct desc_seq_scan_data *data) | |
18cf4781 JK |
1588 | { |
1589 | switch (ident) { | |
1590 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ | |
7b78fd02 | 1591 | return &(data->vds[VDS_POS_PRIMARY_VOL_DESC]); |
18cf4781 | 1592 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
7b78fd02 | 1593 | return &(data->vds[VDS_POS_IMP_USE_VOL_DESC]); |
18cf4781 | 1594 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
7b78fd02 | 1595 | return &(data->vds[VDS_POS_LOGICAL_VOL_DESC]); |
18cf4781 | 1596 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
7b78fd02 JK |
1597 | return &(data->vds[VDS_POS_UNALLOC_SPACE_DESC]); |
1598 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ | |
1599 | return handle_partition_descriptor(bh, data); | |
18cf4781 JK |
1600 | } |
1601 | return NULL; | |
1602 | } | |
e7a4eb86 | 1603 | |
1da177e4 | 1604 | /* |
d759bfa4 JK |
1605 | * Process a main/reserve volume descriptor sequence. |
1606 | * @block First block of first extent of the sequence. | |
1607 | * @lastblock Lastblock of first extent of the sequence. | |
1608 | * @fileset There we store extent containing root fileset | |
1da177e4 | 1609 | * |
d759bfa4 JK |
1610 | * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor |
1611 | * sequence | |
1da177e4 | 1612 | */ |
d759bfa4 JK |
1613 | static noinline int udf_process_sequence( |
1614 | struct super_block *sb, | |
1615 | sector_t block, sector_t lastblock, | |
1616 | struct kernel_lb_addr *fileset) | |
1da177e4 LT |
1617 | { |
1618 | struct buffer_head *bh = NULL; | |
4b11111a | 1619 | struct udf_vds_record *curr; |
1da177e4 LT |
1620 | struct generic_desc *gd; |
1621 | struct volDescPtr *vdp; | |
2b8f9421 | 1622 | bool done = false; |
1da177e4 LT |
1623 | uint32_t vdsn; |
1624 | uint16_t ident; | |
d759bfa4 | 1625 | int ret; |
e7a4eb86 | 1626 | unsigned int indirections = 0; |
7b78fd02 JK |
1627 | struct desc_seq_scan_data data; |
1628 | unsigned int i; | |
1629 | ||
1630 | memset(data.vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1631 | data.size_part_descs = PART_DESC_ALLOC_STEP; | |
ee4af50c | 1632 | data.num_part_descs = 0; |
6396bb22 KC |
1633 | data.part_descs_loc = kcalloc(data.size_part_descs, |
1634 | sizeof(*data.part_descs_loc), | |
1635 | GFP_KERNEL); | |
7b78fd02 JK |
1636 | if (!data.part_descs_loc) |
1637 | return -ENOMEM; | |
1da177e4 | 1638 | |
c0eb31ed JK |
1639 | /* |
1640 | * Read the main descriptor sequence and find which descriptors | |
1641 | * are in it. | |
1642 | */ | |
cb00ea35 | 1643 | for (; (!done && block <= lastblock); block++) { |
1da177e4 | 1644 | bh = udf_read_tagged(sb, block, block, &ident); |
67621675 JK |
1645 | if (!bh) |
1646 | break; | |
1da177e4 LT |
1647 | |
1648 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1649 | gd = (struct generic_desc *)bh->b_data; | |
1650 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1651 | switch (ident) { |
28de7948 | 1652 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
7b568cba JK |
1653 | if (++indirections > UDF_MAX_TD_NESTING) { |
1654 | udf_err(sb, "too many Volume Descriptor " | |
1655 | "Pointers (max %u supported)\n", | |
1656 | UDF_MAX_TD_NESTING); | |
1657 | brelse(bh); | |
1658 | return -EIO; | |
cb00ea35 | 1659 | } |
7b568cba JK |
1660 | |
1661 | vdp = (struct volDescPtr *)bh->b_data; | |
1662 | block = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation); | |
1663 | lastblock = le32_to_cpu( | |
1664 | vdp->nextVolDescSeqExt.extLength) >> | |
1665 | sb->s_blocksize_bits; | |
1666 | lastblock += block - 1; | |
1667 | /* For loop is going to increment 'block' again */ | |
1668 | block--; | |
cb00ea35 | 1669 | break; |
18cf4781 | 1670 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
28de7948 | 1671 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
18cf4781 JK |
1672 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
1673 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ | |
7b78fd02 JK |
1674 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
1675 | curr = get_volume_descriptor_record(ident, bh, &data); | |
1676 | if (IS_ERR(curr)) { | |
1677 | brelse(bh); | |
1678 | return PTR_ERR(curr); | |
1679 | } | |
1680 | /* Descriptor we don't care about? */ | |
1681 | if (!curr) | |
1682 | break; | |
4b11111a MS |
1683 | if (vdsn >= curr->volDescSeqNum) { |
1684 | curr->volDescSeqNum = vdsn; | |
1685 | curr->block = block; | |
cb00ea35 CG |
1686 | } |
1687 | break; | |
28de7948 | 1688 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
7b568cba | 1689 | done = true; |
cb00ea35 | 1690 | break; |
1da177e4 | 1691 | } |
3bf25cb4 | 1692 | brelse(bh); |
1da177e4 | 1693 | } |
c0eb31ed JK |
1694 | /* |
1695 | * Now read interesting descriptors again and process them | |
1696 | * in a suitable order | |
1697 | */ | |
7b78fd02 | 1698 | if (!data.vds[VDS_POS_PRIMARY_VOL_DESC].block) { |
78ace70c | 1699 | udf_err(sb, "Primary Volume Descriptor not found!\n"); |
d759bfa4 JK |
1700 | return -EAGAIN; |
1701 | } | |
7b78fd02 | 1702 | ret = udf_load_pvoldesc(sb, data.vds[VDS_POS_PRIMARY_VOL_DESC].block); |
d759bfa4 JK |
1703 | if (ret < 0) |
1704 | return ret; | |
1705 | ||
7b78fd02 | 1706 | if (data.vds[VDS_POS_LOGICAL_VOL_DESC].block) { |
d759bfa4 | 1707 | ret = udf_load_logicalvol(sb, |
7b78fd02 JK |
1708 | data.vds[VDS_POS_LOGICAL_VOL_DESC].block, |
1709 | fileset); | |
d759bfa4 JK |
1710 | if (ret < 0) |
1711 | return ret; | |
c0eb31ed | 1712 | } |
165923fa | 1713 | |
7b78fd02 | 1714 | /* Now handle prevailing Partition Descriptors */ |
ee4af50c JK |
1715 | for (i = 0; i < data.num_part_descs; i++) { |
1716 | ret = udf_load_partdesc(sb, data.part_descs_loc[i].rec.block); | |
1717 | if (ret < 0) | |
1718 | return ret; | |
1da177e4 LT |
1719 | } |
1720 | ||
1721 | return 0; | |
1722 | } | |
1723 | ||
d759bfa4 JK |
1724 | /* |
1725 | * Load Volume Descriptor Sequence described by anchor in bh | |
1726 | * | |
1727 | * Returns <0 on error, 0 on success | |
1728 | */ | |
40346005 JK |
1729 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, |
1730 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1731 | { |
40346005 | 1732 | struct anchorVolDescPtr *anchor; |
d759bfa4 JK |
1733 | sector_t main_s, main_e, reserve_s, reserve_e; |
1734 | int ret; | |
1da177e4 | 1735 | |
40346005 JK |
1736 | anchor = (struct anchorVolDescPtr *)bh->b_data; |
1737 | ||
1738 | /* Locate the main sequence */ | |
1739 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1740 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1741 | main_e = main_e >> sb->s_blocksize_bits; | |
91c9c9ec | 1742 | main_e += main_s - 1; |
40346005 JK |
1743 | |
1744 | /* Locate the reserve sequence */ | |
1745 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); | |
1746 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); | |
1747 | reserve_e = reserve_e >> sb->s_blocksize_bits; | |
91c9c9ec | 1748 | reserve_e += reserve_s - 1; |
40346005 JK |
1749 | |
1750 | /* Process the main & reserve sequences */ | |
1751 | /* responsible for finding the PartitionDesc(s) */ | |
d759bfa4 JK |
1752 | ret = udf_process_sequence(sb, main_s, main_e, fileset); |
1753 | if (ret != -EAGAIN) | |
1754 | return ret; | |
bff943af | 1755 | udf_sb_free_partitions(sb); |
d759bfa4 JK |
1756 | ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset); |
1757 | if (ret < 0) { | |
1758 | udf_sb_free_partitions(sb); | |
1759 | /* No sequence was OK, return -EIO */ | |
1760 | if (ret == -EAGAIN) | |
1761 | ret = -EIO; | |
1762 | } | |
1763 | return ret; | |
1da177e4 LT |
1764 | } |
1765 | ||
40346005 JK |
1766 | /* |
1767 | * Check whether there is an anchor block in the given block and | |
1768 | * load Volume Descriptor Sequence if so. | |
d759bfa4 JK |
1769 | * |
1770 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor | |
1771 | * block | |
40346005 JK |
1772 | */ |
1773 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, | |
1774 | struct kernel_lb_addr *fileset) | |
1197e4df | 1775 | { |
40346005 JK |
1776 | struct buffer_head *bh; |
1777 | uint16_t ident; | |
1778 | int ret; | |
1197e4df | 1779 | |
40346005 JK |
1780 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
1781 | udf_fixed_to_variable(block) >= | |
23bcda11 | 1782 | i_size_read(sb->s_bdev->bd_inode) >> sb->s_blocksize_bits) |
d759bfa4 | 1783 | return -EAGAIN; |
40346005 JK |
1784 | |
1785 | bh = udf_read_tagged(sb, block, block, &ident); | |
1786 | if (!bh) | |
d759bfa4 | 1787 | return -EAGAIN; |
40346005 JK |
1788 | if (ident != TAG_IDENT_AVDP) { |
1789 | brelse(bh); | |
d759bfa4 | 1790 | return -EAGAIN; |
1197e4df | 1791 | } |
40346005 JK |
1792 | ret = udf_load_sequence(sb, bh, fileset); |
1793 | brelse(bh); | |
1794 | return ret; | |
1197e4df CL |
1795 | } |
1796 | ||
d759bfa4 JK |
1797 | /* |
1798 | * Search for an anchor volume descriptor pointer. | |
1799 | * | |
1800 | * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set | |
1801 | * of anchors. | |
1802 | */ | |
1803 | static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock, | |
1804 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1805 | { |
40346005 | 1806 | sector_t last[6]; |
38b74a53 | 1807 | int i; |
40346005 JK |
1808 | struct udf_sb_info *sbi = UDF_SB(sb); |
1809 | int last_count = 0; | |
d759bfa4 | 1810 | int ret; |
1da177e4 | 1811 | |
40346005 JK |
1812 | /* First try user provided anchor */ |
1813 | if (sbi->s_anchor) { | |
d759bfa4 JK |
1814 | ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset); |
1815 | if (ret != -EAGAIN) | |
1816 | return ret; | |
40346005 JK |
1817 | } |
1818 | /* | |
1819 | * according to spec, anchor is in either: | |
1820 | * block 256 | |
1821 | * lastblock-256 | |
1822 | * lastblock | |
1823 | * however, if the disc isn't closed, it could be 512. | |
1824 | */ | |
d759bfa4 JK |
1825 | ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset); |
1826 | if (ret != -EAGAIN) | |
1827 | return ret; | |
40346005 JK |
1828 | /* |
1829 | * The trouble is which block is the last one. Drives often misreport | |
1830 | * this so we try various possibilities. | |
1831 | */ | |
d759bfa4 JK |
1832 | last[last_count++] = *lastblock; |
1833 | if (*lastblock >= 1) | |
1834 | last[last_count++] = *lastblock - 1; | |
1835 | last[last_count++] = *lastblock + 1; | |
1836 | if (*lastblock >= 2) | |
1837 | last[last_count++] = *lastblock - 2; | |
1838 | if (*lastblock >= 150) | |
1839 | last[last_count++] = *lastblock - 150; | |
1840 | if (*lastblock >= 152) | |
1841 | last[last_count++] = *lastblock - 152; | |
1da177e4 | 1842 | |
40346005 | 1843 | for (i = 0; i < last_count; i++) { |
23bcda11 | 1844 | if (last[i] >= i_size_read(sb->s_bdev->bd_inode) >> |
40346005 | 1845 | sb->s_blocksize_bits) |
28f7c4d4 | 1846 | continue; |
d759bfa4 JK |
1847 | ret = udf_check_anchor_block(sb, last[i], fileset); |
1848 | if (ret != -EAGAIN) { | |
1849 | if (!ret) | |
1850 | *lastblock = last[i]; | |
1851 | return ret; | |
1852 | } | |
40346005 | 1853 | if (last[i] < 256) |
28f7c4d4 | 1854 | continue; |
d759bfa4 JK |
1855 | ret = udf_check_anchor_block(sb, last[i] - 256, fileset); |
1856 | if (ret != -EAGAIN) { | |
1857 | if (!ret) | |
1858 | *lastblock = last[i]; | |
1859 | return ret; | |
1860 | } | |
40346005 | 1861 | } |
28f7c4d4 | 1862 | |
40346005 | 1863 | /* Finally try block 512 in case media is open */ |
d759bfa4 | 1864 | return udf_check_anchor_block(sb, sbi->s_session + 512, fileset); |
40346005 | 1865 | } |
28f7c4d4 | 1866 | |
40346005 JK |
1867 | /* |
1868 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from | |
1869 | * area specified by it. The function expects sbi->s_lastblock to be the last | |
1870 | * block on the media. | |
1871 | * | |
d759bfa4 JK |
1872 | * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor |
1873 | * was not found. | |
40346005 JK |
1874 | */ |
1875 | static int udf_find_anchor(struct super_block *sb, | |
1876 | struct kernel_lb_addr *fileset) | |
1877 | { | |
40346005 | 1878 | struct udf_sb_info *sbi = UDF_SB(sb); |
d759bfa4 JK |
1879 | sector_t lastblock = sbi->s_last_block; |
1880 | int ret; | |
28f7c4d4 | 1881 | |
d759bfa4 JK |
1882 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1883 | if (ret != -EAGAIN) | |
40346005 | 1884 | goto out; |
1da177e4 | 1885 | |
40346005 JK |
1886 | /* No anchor found? Try VARCONV conversion of block numbers */ |
1887 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
d759bfa4 | 1888 | lastblock = udf_variable_to_fixed(sbi->s_last_block); |
40346005 | 1889 | /* Firstly, we try to not convert number of the last block */ |
d759bfa4 JK |
1890 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1891 | if (ret != -EAGAIN) | |
40346005 | 1892 | goto out; |
1da177e4 | 1893 | |
d759bfa4 | 1894 | lastblock = sbi->s_last_block; |
40346005 | 1895 | /* Secondly, we try with converted number of the last block */ |
d759bfa4 JK |
1896 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1897 | if (ret < 0) { | |
40346005 JK |
1898 | /* VARCONV didn't help. Clear it. */ |
1899 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); | |
1da177e4 | 1900 | } |
40346005 | 1901 | out: |
d759bfa4 JK |
1902 | if (ret == 0) |
1903 | sbi->s_last_block = lastblock; | |
1904 | return ret; | |
40346005 | 1905 | } |
1da177e4 | 1906 | |
40346005 JK |
1907 | /* |
1908 | * Check Volume Structure Descriptor, find Anchor block and load Volume | |
d759bfa4 JK |
1909 | * Descriptor Sequence. |
1910 | * | |
1911 | * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor | |
1912 | * block was not found. | |
40346005 JK |
1913 | */ |
1914 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, | |
1915 | int silent, struct kernel_lb_addr *fileset) | |
1916 | { | |
1917 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1918 | loff_t nsr_off; | |
d759bfa4 | 1919 | int ret; |
40346005 JK |
1920 | |
1921 | if (!sb_set_blocksize(sb, uopt->blocksize)) { | |
1922 | if (!silent) | |
78ace70c | 1923 | udf_warn(sb, "Bad block size\n"); |
d759bfa4 | 1924 | return -EINVAL; |
40346005 JK |
1925 | } |
1926 | sbi->s_last_block = uopt->lastblock; | |
1927 | if (!uopt->novrs) { | |
1928 | /* Check that it is NSR02 compliant */ | |
1929 | nsr_off = udf_check_vsd(sb); | |
1930 | if (!nsr_off) { | |
1931 | if (!silent) | |
78ace70c | 1932 | udf_warn(sb, "No VRS found\n"); |
70f16cef | 1933 | return -EINVAL; |
40346005 JK |
1934 | } |
1935 | if (nsr_off == -1) | |
44499602 PF |
1936 | udf_debug("Failed to read sector at offset %d. " |
1937 | "Assuming open disc. Skipping validity " | |
1938 | "check\n", VSD_FIRST_SECTOR_OFFSET); | |
40346005 JK |
1939 | if (!sbi->s_last_block) |
1940 | sbi->s_last_block = udf_get_last_block(sb); | |
1941 | } else { | |
1942 | udf_debug("Validity check skipped because of novrs option\n"); | |
28f7c4d4 | 1943 | } |
1da177e4 | 1944 | |
40346005 JK |
1945 | /* Look for anchor block and load Volume Descriptor Sequence */ |
1946 | sbi->s_anchor = uopt->anchor; | |
d759bfa4 JK |
1947 | ret = udf_find_anchor(sb, fileset); |
1948 | if (ret < 0) { | |
1949 | if (!silent && ret == -EAGAIN) | |
78ace70c | 1950 | udf_warn(sb, "No anchor found\n"); |
d759bfa4 | 1951 | return ret; |
40346005 | 1952 | } |
d759bfa4 | 1953 | return 0; |
1da177e4 LT |
1954 | } |
1955 | ||
ebbd5e99 SM |
1956 | static void udf_finalize_lvid(struct logicalVolIntegrityDesc *lvid) |
1957 | { | |
1958 | struct timespec64 ts; | |
1959 | ||
1960 | ktime_get_real_ts64(&ts); | |
1961 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts); | |
1962 | lvid->descTag.descCRC = cpu_to_le16( | |
1963 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), | |
1964 | le16_to_cpu(lvid->descTag.descCRCLength))); | |
1965 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1966 | } | |
1967 | ||
1da177e4 LT |
1968 | static void udf_open_lvid(struct super_block *sb) |
1969 | { | |
6c79e987 MS |
1970 | struct udf_sb_info *sbi = UDF_SB(sb); |
1971 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
1972 | struct logicalVolIntegrityDesc *lvid; |
1973 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
146bca72 | 1974 | |
165923fa MS |
1975 | if (!bh) |
1976 | return; | |
165923fa | 1977 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
69d75671 JK |
1978 | lvidiu = udf_sb_lvidiu(sb); |
1979 | if (!lvidiu) | |
1980 | return; | |
165923fa | 1981 | |
69d75671 | 1982 | mutex_lock(&sbi->s_alloc_mutex); |
165923fa MS |
1983 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
1984 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
b72e632c JK |
1985 | if (le32_to_cpu(lvid->integrityType) == LVID_INTEGRITY_TYPE_CLOSE) |
1986 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); | |
1987 | else | |
1988 | UDF_SET_FLAG(sb, UDF_FLAG_INCONSISTENT); | |
165923fa | 1989 | |
ebbd5e99 | 1990 | udf_finalize_lvid(lvid); |
165923fa | 1991 | mark_buffer_dirty(bh); |
146bca72 | 1992 | sbi->s_lvid_dirty = 0; |
949f4a7c | 1993 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
1994 | /* Make opening of filesystem visible on the media immediately */ |
1995 | sync_dirty_buffer(bh); | |
1da177e4 LT |
1996 | } |
1997 | ||
1998 | static void udf_close_lvid(struct super_block *sb) | |
1999 | { | |
6c79e987 MS |
2000 | struct udf_sb_info *sbi = UDF_SB(sb); |
2001 | struct buffer_head *bh = sbi->s_lvid_bh; | |
2002 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 2003 | struct logicalVolIntegrityDescImpUse *lvidiu; |
28de7948 | 2004 | |
6c79e987 MS |
2005 | if (!bh) |
2006 | return; | |
69d75671 JK |
2007 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
2008 | lvidiu = udf_sb_lvidiu(sb); | |
2009 | if (!lvidiu) | |
2010 | return; | |
6c79e987 | 2011 | |
949f4a7c | 2012 | mutex_lock(&sbi->s_alloc_mutex); |
165923fa MS |
2013 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
2014 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
165923fa MS |
2015 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) |
2016 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
2017 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
2018 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
2019 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
2020 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
b72e632c JK |
2021 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_INCONSISTENT)) |
2022 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
165923fa | 2023 | |
853a0c25 JK |
2024 | /* |
2025 | * We set buffer uptodate unconditionally here to avoid spurious | |
2026 | * warnings from mark_buffer_dirty() when previous EIO has marked | |
2027 | * the buffer as !uptodate | |
2028 | */ | |
2029 | set_buffer_uptodate(bh); | |
ebbd5e99 | 2030 | udf_finalize_lvid(lvid); |
165923fa | 2031 | mark_buffer_dirty(bh); |
146bca72 | 2032 | sbi->s_lvid_dirty = 0; |
949f4a7c | 2033 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
2034 | /* Make closing of filesystem visible on the media immediately */ |
2035 | sync_dirty_buffer(bh); | |
1da177e4 LT |
2036 | } |
2037 | ||
d664b6af JK |
2038 | u64 lvid_get_unique_id(struct super_block *sb) |
2039 | { | |
2040 | struct buffer_head *bh; | |
2041 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2042 | struct logicalVolIntegrityDesc *lvid; | |
2043 | struct logicalVolHeaderDesc *lvhd; | |
2044 | u64 uniqueID; | |
2045 | u64 ret; | |
2046 | ||
2047 | bh = sbi->s_lvid_bh; | |
2048 | if (!bh) | |
2049 | return 0; | |
2050 | ||
2051 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
2052 | lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; | |
2053 | ||
2054 | mutex_lock(&sbi->s_alloc_mutex); | |
2055 | ret = uniqueID = le64_to_cpu(lvhd->uniqueID); | |
2056 | if (!(++uniqueID & 0xFFFFFFFF)) | |
2057 | uniqueID += 16; | |
2058 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
e8b42747 | 2059 | udf_updated_lvid(sb); |
d664b6af | 2060 | mutex_unlock(&sbi->s_alloc_mutex); |
d664b6af JK |
2061 | |
2062 | return ret; | |
1da177e4 LT |
2063 | } |
2064 | ||
1da177e4 LT |
2065 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
2066 | { | |
d759bfa4 | 2067 | int ret = -EINVAL; |
cb00ea35 | 2068 | struct inode *inode = NULL; |
1da177e4 | 2069 | struct udf_options uopt; |
5ca4e4be | 2070 | struct kernel_lb_addr rootdir, fileset; |
1da177e4 | 2071 | struct udf_sb_info *sbi; |
9181f8bf | 2072 | bool lvid_open = false; |
1da177e4 LT |
2073 | |
2074 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
116e5258 JK |
2075 | /* By default we'll use overflow[ug]id when UDF inode [ug]id == -1 */ |
2076 | uopt.uid = make_kuid(current_user_ns(), overflowuid); | |
2077 | uopt.gid = make_kgid(current_user_ns(), overflowgid); | |
1da177e4 | 2078 | uopt.umask = 0; |
87bc730c MS |
2079 | uopt.fmode = UDF_INVALID_MODE; |
2080 | uopt.dmode = UDF_INVALID_MODE; | |
785dffe1 | 2081 | uopt.nls_map = NULL; |
1da177e4 | 2082 | |
033c9da0 | 2083 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
9db9f9e3 | 2084 | if (!sbi) |
1da177e4 | 2085 | return -ENOMEM; |
28de7948 | 2086 | |
1da177e4 | 2087 | sb->s_fs_info = sbi; |
1da177e4 | 2088 | |
1e7933de | 2089 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 2090 | |
6da80894 | 2091 | if (!udf_parse_options((char *)options, &uopt, false)) |
fdf2657b | 2092 | goto parse_options_failure; |
1da177e4 LT |
2093 | |
2094 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 2095 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
8076c363 | 2096 | udf_err(sb, "utf8 cannot be combined with iocharset\n"); |
fdf2657b | 2097 | goto parse_options_failure; |
1da177e4 | 2098 | } |
cb00ea35 | 2099 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
2100 | uopt.nls_map = load_nls_default(); |
2101 | if (!uopt.nls_map) | |
2102 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
2103 | else | |
2104 | udf_debug("Using default NLS map\n"); | |
2105 | } | |
1da177e4 LT |
2106 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) |
2107 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
2108 | ||
2109 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
2110 | fileset.partitionReferenceNum = 0xFFFF; | |
2111 | ||
6c79e987 MS |
2112 | sbi->s_flags = uopt.flags; |
2113 | sbi->s_uid = uopt.uid; | |
2114 | sbi->s_gid = uopt.gid; | |
2115 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
2116 | sbi->s_fmode = uopt.fmode; |
2117 | sbi->s_dmode = uopt.dmode; | |
6c79e987 | 2118 | sbi->s_nls_map = uopt.nls_map; |
c03cad24 | 2119 | rwlock_init(&sbi->s_cred_lock); |
1da177e4 | 2120 | |
cb00ea35 | 2121 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 2122 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 2123 | else |
6c79e987 | 2124 | sbi->s_session = uopt.session; |
1da177e4 | 2125 | |
6c79e987 | 2126 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 2127 | |
40346005 JK |
2128 | /* Fill in the rest of the superblock */ |
2129 | sb->s_op = &udf_sb_ops; | |
2130 | sb->s_export_op = &udf_export_ops; | |
123e9caf | 2131 | |
40346005 JK |
2132 | sb->s_magic = UDF_SUPER_MAGIC; |
2133 | sb->s_time_gran = 1000; | |
2134 | ||
1197e4df | 2135 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { |
40346005 | 2136 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 2137 | } else { |
e1defc4f | 2138 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); |
70f16cef | 2139 | while (uopt.blocksize <= 4096) { |
40346005 | 2140 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
70f16cef FF |
2141 | if (ret < 0) { |
2142 | if (!silent && ret != -EACCES) { | |
fcbf7637 | 2143 | pr_notice("Scanning with blocksize %u failed\n", |
70f16cef FF |
2144 | uopt.blocksize); |
2145 | } | |
2146 | brelse(sbi->s_lvid_bh); | |
2147 | sbi->s_lvid_bh = NULL; | |
2148 | /* | |
2149 | * EACCES is special - we want to propagate to | |
2150 | * upper layers that we cannot handle RW mount. | |
2151 | */ | |
2152 | if (ret == -EACCES) | |
2153 | break; | |
2154 | } else | |
2155 | break; | |
2156 | ||
2157 | uopt.blocksize <<= 1; | |
1197e4df | 2158 | } |
1da177e4 | 2159 | } |
d759bfa4 JK |
2160 | if (ret < 0) { |
2161 | if (ret == -EAGAIN) { | |
2162 | udf_warn(sb, "No partition found (1)\n"); | |
2163 | ret = -EINVAL; | |
2164 | } | |
1da177e4 LT |
2165 | goto error_out; |
2166 | } | |
2167 | ||
fcbf7637 | 2168 | udf_debug("Lastblock=%u\n", sbi->s_last_block); |
1da177e4 | 2169 | |
6c79e987 | 2170 | if (sbi->s_lvid_bh) { |
4b11111a | 2171 | struct logicalVolIntegrityDescImpUse *lvidiu = |
69d75671 JK |
2172 | udf_sb_lvidiu(sb); |
2173 | uint16_t minUDFReadRev; | |
2174 | uint16_t minUDFWriteRev; | |
1da177e4 | 2175 | |
69d75671 JK |
2176 | if (!lvidiu) { |
2177 | ret = -EINVAL; | |
2178 | goto error_out; | |
2179 | } | |
2180 | minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); | |
2181 | minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
cb00ea35 | 2182 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
78ace70c | 2183 | udf_err(sb, "minUDFReadRev=%x (max is %x)\n", |
69d75671 | 2184 | minUDFReadRev, |
78ace70c | 2185 | UDF_MAX_READ_VERSION); |
d759bfa4 | 2186 | ret = -EINVAL; |
1da177e4 | 2187 | goto error_out; |
a9ad01bc JK |
2188 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) { |
2189 | if (!sb_rdonly(sb)) { | |
2190 | ret = -EACCES; | |
2191 | goto error_out; | |
2192 | } | |
2193 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); | |
e729eac6 | 2194 | } |
1da177e4 | 2195 | |
6c79e987 | 2196 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
2197 | |
2198 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
2199 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
2200 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
2201 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
2202 | } | |
2203 | ||
6c79e987 | 2204 | if (!sbi->s_partitions) { |
78ace70c | 2205 | udf_warn(sb, "No partition found (2)\n"); |
d759bfa4 | 2206 | ret = -EINVAL; |
1da177e4 LT |
2207 | goto error_out; |
2208 | } | |
2209 | ||
4b11111a | 2210 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
a9ad01bc JK |
2211 | UDF_PART_FLAG_READ_ONLY) { |
2212 | if (!sb_rdonly(sb)) { | |
2213 | ret = -EACCES; | |
2214 | goto error_out; | |
2215 | } | |
2216 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); | |
c1a26e7d | 2217 | } |
39b3f6d6 | 2218 | |
cb00ea35 | 2219 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
78ace70c | 2220 | udf_warn(sb, "No fileset found\n"); |
d759bfa4 | 2221 | ret = -EINVAL; |
1da177e4 LT |
2222 | goto error_out; |
2223 | } | |
2224 | ||
cb00ea35 | 2225 | if (!silent) { |
5ca4e4be | 2226 | struct timestamp ts; |
56774805 | 2227 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); |
78ace70c JP |
2228 | udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
2229 | sbi->s_volume_ident, | |
2230 | le16_to_cpu(ts.year), ts.month, ts.day, | |
56774805 | 2231 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); |
1da177e4 | 2232 | } |
bc98a42c | 2233 | if (!sb_rdonly(sb)) { |
1da177e4 | 2234 | udf_open_lvid(sb); |
9181f8bf JK |
2235 | lvid_open = true; |
2236 | } | |
1da177e4 LT |
2237 | |
2238 | /* Assign the root inode */ | |
2239 | /* assign inodes by physical block number */ | |
2240 | /* perhaps it's not extensible enough, but for now ... */ | |
97e961fd | 2241 | inode = udf_iget(sb, &rootdir); |
6d3d5e86 | 2242 | if (IS_ERR(inode)) { |
fcbf7637 | 2243 | udf_err(sb, "Error in udf_iget, block=%u, partition=%u\n", |
cb00ea35 | 2244 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
6d3d5e86 | 2245 | ret = PTR_ERR(inode); |
1da177e4 LT |
2246 | goto error_out; |
2247 | } | |
2248 | ||
2249 | /* Allocate a dentry for the root inode */ | |
48fde701 | 2250 | sb->s_root = d_make_root(inode); |
cb00ea35 | 2251 | if (!sb->s_root) { |
78ace70c | 2252 | udf_err(sb, "Couldn't allocate root dentry\n"); |
d759bfa4 | 2253 | ret = -ENOMEM; |
1da177e4 LT |
2254 | goto error_out; |
2255 | } | |
31170b6a | 2256 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
8de52778 | 2257 | sb->s_max_links = UDF_MAX_LINKS; |
1da177e4 LT |
2258 | return 0; |
2259 | ||
28de7948 | 2260 | error_out: |
0d454e4a | 2261 | iput(sbi->s_vat_inode); |
fdf2657b | 2262 | parse_options_failure: |
785dffe1 CX |
2263 | if (uopt.nls_map) |
2264 | unload_nls(uopt.nls_map); | |
9181f8bf | 2265 | if (lvid_open) |
1da177e4 | 2266 | udf_close_lvid(sb); |
6c79e987 | 2267 | brelse(sbi->s_lvid_bh); |
bff943af | 2268 | udf_sb_free_partitions(sb); |
1da177e4 LT |
2269 | kfree(sbi); |
2270 | sb->s_fs_info = NULL; | |
28de7948 | 2271 | |
d759bfa4 | 2272 | return ret; |
1da177e4 LT |
2273 | } |
2274 | ||
8076c363 JP |
2275 | void _udf_err(struct super_block *sb, const char *function, |
2276 | const char *fmt, ...) | |
1da177e4 | 2277 | { |
c2bff36c | 2278 | struct va_format vaf; |
1da177e4 LT |
2279 | va_list args; |
2280 | ||
1da177e4 | 2281 | va_start(args, fmt); |
c2bff36c JP |
2282 | |
2283 | vaf.fmt = fmt; | |
2284 | vaf.va = &args; | |
2285 | ||
2286 | pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2287 | ||
1da177e4 | 2288 | va_end(args); |
1da177e4 LT |
2289 | } |
2290 | ||
a40ecd7b JP |
2291 | void _udf_warn(struct super_block *sb, const char *function, |
2292 | const char *fmt, ...) | |
1da177e4 | 2293 | { |
c2bff36c | 2294 | struct va_format vaf; |
1da177e4 LT |
2295 | va_list args; |
2296 | ||
cb00ea35 | 2297 | va_start(args, fmt); |
c2bff36c JP |
2298 | |
2299 | vaf.fmt = fmt; | |
2300 | vaf.va = &args; | |
2301 | ||
2302 | pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2303 | ||
1da177e4 | 2304 | va_end(args); |
1da177e4 LT |
2305 | } |
2306 | ||
cb00ea35 | 2307 | static void udf_put_super(struct super_block *sb) |
1da177e4 | 2308 | { |
6c79e987 | 2309 | struct udf_sb_info *sbi; |
1da177e4 | 2310 | |
6c79e987 | 2311 | sbi = UDF_SB(sb); |
6cfd0148 | 2312 | |
0d454e4a | 2313 | iput(sbi->s_vat_inode); |
1da177e4 | 2314 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) |
6c79e987 | 2315 | unload_nls(sbi->s_nls_map); |
bc98a42c | 2316 | if (!sb_rdonly(sb)) |
1da177e4 | 2317 | udf_close_lvid(sb); |
6c79e987 | 2318 | brelse(sbi->s_lvid_bh); |
bff943af | 2319 | udf_sb_free_partitions(sb); |
bbe48dd8 | 2320 | mutex_destroy(&sbi->s_alloc_mutex); |
1da177e4 LT |
2321 | kfree(sb->s_fs_info); |
2322 | sb->s_fs_info = NULL; | |
2323 | } | |
2324 | ||
146bca72 JK |
2325 | static int udf_sync_fs(struct super_block *sb, int wait) |
2326 | { | |
2327 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2328 | ||
2329 | mutex_lock(&sbi->s_alloc_mutex); | |
2330 | if (sbi->s_lvid_dirty) { | |
e8b42747 | 2331 | struct buffer_head *bh = sbi->s_lvid_bh; |
52b9666e | 2332 | struct logicalVolIntegrityDesc *lvid; |
e8b42747 | 2333 | |
52b9666e JK |
2334 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
2335 | udf_finalize_lvid(lvid); | |
e8b42747 | 2336 | |
146bca72 JK |
2337 | /* |
2338 | * Blockdevice will be synced later so we don't have to submit | |
2339 | * the buffer for IO | |
2340 | */ | |
e8b42747 | 2341 | mark_buffer_dirty(bh); |
146bca72 JK |
2342 | sbi->s_lvid_dirty = 0; |
2343 | } | |
2344 | mutex_unlock(&sbi->s_alloc_mutex); | |
2345 | ||
2346 | return 0; | |
2347 | } | |
2348 | ||
cb00ea35 | 2349 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2350 | { |
726c3342 | 2351 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
2352 | struct udf_sb_info *sbi = UDF_SB(sb); |
2353 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
557f5a14 | 2354 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
6c79e987 | 2355 | |
69d75671 | 2356 | lvidiu = udf_sb_lvidiu(sb); |
1da177e4 LT |
2357 | buf->f_type = UDF_SUPER_MAGIC; |
2358 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 2359 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
2360 | buf->f_bfree = udf_count_free(sb); |
2361 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
2362 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
2363 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
2364 | + buf->f_bfree; | |
1da177e4 | 2365 | buf->f_ffree = buf->f_bfree; |
9fba7056 | 2366 | buf->f_namelen = UDF_NAME_LEN; |
557f5a14 CL |
2367 | buf->f_fsid.val[0] = (u32)id; |
2368 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
2369 | |
2370 | return 0; | |
2371 | } | |
2372 | ||
4b11111a MS |
2373 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
2374 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
2375 | { |
2376 | struct buffer_head *bh = NULL; | |
2377 | unsigned int accum = 0; | |
2378 | int index; | |
b490bdd6 | 2379 | udf_pblk_t block = 0, newblock; |
5ca4e4be | 2380 | struct kernel_lb_addr loc; |
1da177e4 | 2381 | uint32_t bytes; |
1da177e4 LT |
2382 | uint8_t *ptr; |
2383 | uint16_t ident; | |
2384 | struct spaceBitmapDesc *bm; | |
2385 | ||
1da177e4 | 2386 | loc.logicalBlockNum = bitmap->s_extPosition; |
6c79e987 | 2387 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
97e961fd | 2388 | bh = udf_read_ptagged(sb, &loc, 0, &ident); |
1da177e4 | 2389 | |
cb00ea35 | 2390 | if (!bh) { |
78ace70c | 2391 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 | 2392 | goto out; |
cb00ea35 | 2393 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 2394 | brelse(bh); |
78ace70c | 2395 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 LT |
2396 | goto out; |
2397 | } | |
2398 | ||
2399 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2400 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
2401 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
2402 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 2403 | |
cb00ea35 | 2404 | while (bytes > 0) { |
01b954a3 MS |
2405 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
2406 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2407 | cur_bytes * 8); | |
2408 | bytes -= cur_bytes; | |
cb00ea35 | 2409 | if (bytes) { |
3bf25cb4 | 2410 | brelse(bh); |
97e961fd | 2411 | newblock = udf_get_lb_pblock(sb, &loc, ++block); |
1da177e4 | 2412 | bh = udf_tread(sb, newblock); |
cb00ea35 | 2413 | if (!bh) { |
1da177e4 LT |
2414 | udf_debug("read failed\n"); |
2415 | goto out; | |
2416 | } | |
2417 | index = 0; | |
28de7948 | 2418 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2419 | } |
2420 | } | |
3bf25cb4 | 2421 | brelse(bh); |
28de7948 | 2422 | out: |
1da177e4 LT |
2423 | return accum; |
2424 | } | |
2425 | ||
4b11111a MS |
2426 | static unsigned int udf_count_free_table(struct super_block *sb, |
2427 | struct inode *table) | |
1da177e4 LT |
2428 | { |
2429 | unsigned int accum = 0; | |
ff116fc8 | 2430 | uint32_t elen; |
5ca4e4be | 2431 | struct kernel_lb_addr eloc; |
1da177e4 | 2432 | int8_t etype; |
ff116fc8 | 2433 | struct extent_position epos; |
1da177e4 | 2434 | |
d1668fe3 | 2435 | mutex_lock(&UDF_SB(sb)->s_alloc_mutex); |
c0b34438 | 2436 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2437 | epos.offset = sizeof(struct unallocSpaceEntry); |
2438 | epos.bh = NULL; | |
1da177e4 | 2439 | |
3a71fc5d | 2440 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2441 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2442 | |
3bf25cb4 | 2443 | brelse(epos.bh); |
d1668fe3 | 2444 | mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); |
1da177e4 LT |
2445 | |
2446 | return accum; | |
2447 | } | |
cb00ea35 CG |
2448 | |
2449 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2450 | { |
2451 | unsigned int accum = 0; | |
6c79e987 MS |
2452 | struct udf_sb_info *sbi; |
2453 | struct udf_part_map *map; | |
1da177e4 | 2454 | |
6c79e987 MS |
2455 | sbi = UDF_SB(sb); |
2456 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2457 | struct logicalVolIntegrityDesc *lvid = |
2458 | (struct logicalVolIntegrityDesc *) | |
2459 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2460 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2461 | accum = le32_to_cpu( |
2462 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2463 | if (accum == 0xFFFFFFFF) |
2464 | accum = 0; | |
2465 | } | |
2466 | } | |
2467 | ||
2468 | if (accum) | |
2469 | return accum; | |
2470 | ||
6c79e987 MS |
2471 | map = &sbi->s_partmaps[sbi->s_partition]; |
2472 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2473 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2474 | map->s_uspace.s_bitmap); |
1da177e4 | 2475 | } |
1da177e4 LT |
2476 | if (accum) |
2477 | return accum; | |
2478 | ||
6c79e987 | 2479 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2480 | accum += udf_count_free_table(sb, |
6c79e987 | 2481 | map->s_uspace.s_table); |
1da177e4 | 2482 | } |
1da177e4 LT |
2483 | return accum; |
2484 | } | |
54bb60d5 FF |
2485 | |
2486 | MODULE_AUTHOR("Ben Fennema"); | |
2487 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); | |
2488 | MODULE_LICENSE("GPL"); | |
2489 | module_init(init_udf_fs) | |
2490 | module_exit(exit_udf_fs) |