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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/ | |
248727a4 AK |
14 | * https://www.ecma.ch/ |
15 | * https://www.iso.org/ | |
1da177e4 | 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); |
1da177e4 LT |
95 | static void udf_open_lvid(struct super_block *); |
96 | static void udf_close_lvid(struct super_block *); | |
97 | static unsigned int udf_count_free(struct super_block *); | |
726c3342 | 98 | static int udf_statfs(struct dentry *, struct kstatfs *); |
34c80b1d | 99 | static int udf_show_options(struct seq_file *, struct dentry *); |
1da177e4 | 100 | |
69d75671 | 101 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb) |
6c79e987 | 102 | { |
69d75671 JK |
103 | struct logicalVolIntegrityDesc *lvid; |
104 | unsigned int partnum; | |
105 | unsigned int offset; | |
106 | ||
107 | if (!UDF_SB(sb)->s_lvid_bh) | |
108 | return NULL; | |
109 | lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data; | |
110 | partnum = le32_to_cpu(lvid->numOfPartitions); | |
111 | if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) - | |
112 | offsetof(struct logicalVolIntegrityDesc, impUse)) / | |
113 | (2 * sizeof(uint32_t)) < partnum) { | |
114 | udf_err(sb, "Logical volume integrity descriptor corrupted " | |
115 | "(numOfPartitions = %u)!\n", partnum); | |
116 | return NULL; | |
117 | } | |
118 | /* The offset is to skip freeSpaceTable and sizeTable arrays */ | |
119 | offset = partnum * 2 * sizeof(uint32_t); | |
6c79e987 MS |
120 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
121 | } | |
122 | ||
1da177e4 | 123 | /* UDF filesystem type */ |
152a0836 AV |
124 | static struct dentry *udf_mount(struct file_system_type *fs_type, |
125 | int flags, const char *dev_name, void *data) | |
1da177e4 | 126 | { |
152a0836 | 127 | return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super); |
1da177e4 LT |
128 | } |
129 | ||
130 | static struct file_system_type udf_fstype = { | |
28de7948 CG |
131 | .owner = THIS_MODULE, |
132 | .name = "udf", | |
152a0836 | 133 | .mount = udf_mount, |
28de7948 CG |
134 | .kill_sb = kill_block_super, |
135 | .fs_flags = FS_REQUIRES_DEV, | |
1da177e4 | 136 | }; |
3e64fe5b | 137 | MODULE_ALIAS_FS("udf"); |
1da177e4 | 138 | |
cb00ea35 | 139 | static struct kmem_cache *udf_inode_cachep; |
1da177e4 LT |
140 | |
141 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
142 | { | |
143 | struct udf_inode_info *ei; | |
3a71fc5d | 144 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
145 | if (!ei) |
146 | return NULL; | |
95f8797f DB |
147 | |
148 | ei->i_unique = 0; | |
149 | ei->i_lenExtents = 0; | |
ab9a3a73 | 150 | ei->i_lenStreams = 0; |
95f8797f DB |
151 | ei->i_next_alloc_block = 0; |
152 | ei->i_next_alloc_goal = 0; | |
153 | ei->i_strat4096 = 0; | |
ab9a3a73 | 154 | ei->i_streamdir = 0; |
4d0fb621 | 155 | init_rwsem(&ei->i_data_sem); |
99600051 NJ |
156 | ei->cached_extent.lstart = -1; |
157 | spin_lock_init(&ei->i_extent_cache_lock); | |
95f8797f | 158 | |
1da177e4 LT |
159 | return &ei->vfs_inode; |
160 | } | |
161 | ||
a78bb383 | 162 | static void udf_free_in_core_inode(struct inode *inode) |
1da177e4 LT |
163 | { |
164 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); | |
165 | } | |
166 | ||
51cc5068 | 167 | static void init_once(void *foo) |
1da177e4 | 168 | { |
cb00ea35 | 169 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 170 | |
a35afb83 CL |
171 | ei->i_ext.i_data = NULL; |
172 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
173 | } |
174 | ||
53ea18de | 175 | static int __init init_inodecache(void) |
1da177e4 LT |
176 | { |
177 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
178 | sizeof(struct udf_inode_info), | |
cb00ea35 | 179 | 0, (SLAB_RECLAIM_ACCOUNT | |
5d097056 VD |
180 | SLAB_MEM_SPREAD | |
181 | SLAB_ACCOUNT), | |
20c2df83 | 182 | init_once); |
28de7948 | 183 | if (!udf_inode_cachep) |
1da177e4 LT |
184 | return -ENOMEM; |
185 | return 0; | |
186 | } | |
187 | ||
188 | static void destroy_inodecache(void) | |
189 | { | |
8c0a8537 KS |
190 | /* |
191 | * Make sure all delayed rcu free inodes are flushed before we | |
192 | * destroy cache. | |
193 | */ | |
194 | rcu_barrier(); | |
1a1d92c1 | 195 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
196 | } |
197 | ||
198 | /* Superblock operations */ | |
ee9b6d61 | 199 | static const struct super_operations udf_sb_ops = { |
28de7948 | 200 | .alloc_inode = udf_alloc_inode, |
a78bb383 | 201 | .free_inode = udf_free_in_core_inode, |
28de7948 | 202 | .write_inode = udf_write_inode, |
3aac2b62 | 203 | .evict_inode = udf_evict_inode, |
28de7948 | 204 | .put_super = udf_put_super, |
146bca72 | 205 | .sync_fs = udf_sync_fs, |
28de7948 CG |
206 | .statfs = udf_statfs, |
207 | .remount_fs = udf_remount_fs, | |
6da80894 | 208 | .show_options = udf_show_options, |
1da177e4 LT |
209 | }; |
210 | ||
cb00ea35 | 211 | struct udf_options { |
1da177e4 LT |
212 | unsigned char novrs; |
213 | unsigned int blocksize; | |
214 | unsigned int session; | |
215 | unsigned int lastblock; | |
216 | unsigned int anchor; | |
1da177e4 | 217 | unsigned int flags; |
faa17292 | 218 | umode_t umask; |
c2ba138a EB |
219 | kgid_t gid; |
220 | kuid_t uid; | |
faa17292 AV |
221 | umode_t fmode; |
222 | umode_t dmode; | |
1da177e4 LT |
223 | struct nls_table *nls_map; |
224 | }; | |
225 | ||
226 | static int __init init_udf_fs(void) | |
227 | { | |
228 | int err; | |
28de7948 | 229 | |
1da177e4 LT |
230 | err = init_inodecache(); |
231 | if (err) | |
232 | goto out1; | |
233 | err = register_filesystem(&udf_fstype); | |
234 | if (err) | |
235 | goto out; | |
28de7948 | 236 | |
1da177e4 | 237 | return 0; |
28de7948 CG |
238 | |
239 | out: | |
1da177e4 | 240 | destroy_inodecache(); |
28de7948 CG |
241 | |
242 | out1: | |
1da177e4 LT |
243 | return err; |
244 | } | |
245 | ||
246 | static void __exit exit_udf_fs(void) | |
247 | { | |
248 | unregister_filesystem(&udf_fstype); | |
249 | destroy_inodecache(); | |
250 | } | |
251 | ||
dc5d39be MS |
252 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
253 | { | |
254 | struct udf_sb_info *sbi = UDF_SB(sb); | |
255 | ||
033c9da0 | 256 | sbi->s_partmaps = kcalloc(count, sizeof(*sbi->s_partmaps), GFP_KERNEL); |
dc5d39be | 257 | if (!sbi->s_partmaps) { |
dc5d39be MS |
258 | sbi->s_partitions = 0; |
259 | return -ENOMEM; | |
260 | } | |
261 | ||
262 | sbi->s_partitions = count; | |
263 | return 0; | |
264 | } | |
265 | ||
bff943af JK |
266 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
267 | { | |
268 | int i; | |
269 | int nr_groups = bitmap->s_nr_groups; | |
bff943af JK |
270 | |
271 | for (i = 0; i < nr_groups; i++) | |
4eb09e11 | 272 | brelse(bitmap->s_block_bitmap[i]); |
bff943af | 273 | |
1d5cfdb0 | 274 | kvfree(bitmap); |
bff943af JK |
275 | } |
276 | ||
277 | static void udf_free_partition(struct udf_part_map *map) | |
278 | { | |
279 | int i; | |
280 | struct udf_meta_data *mdata; | |
281 | ||
282 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
283 | iput(map->s_uspace.s_table); | |
bff943af JK |
284 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) |
285 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
bff943af JK |
286 | if (map->s_partition_type == UDF_SPARABLE_MAP15) |
287 | for (i = 0; i < 4; i++) | |
288 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
289 | else if (map->s_partition_type == UDF_METADATA_MAP25) { | |
290 | mdata = &map->s_type_specific.s_metadata; | |
291 | iput(mdata->s_metadata_fe); | |
292 | mdata->s_metadata_fe = NULL; | |
293 | ||
294 | iput(mdata->s_mirror_fe); | |
295 | mdata->s_mirror_fe = NULL; | |
296 | ||
297 | iput(mdata->s_bitmap_fe); | |
298 | mdata->s_bitmap_fe = NULL; | |
299 | } | |
300 | } | |
301 | ||
302 | static void udf_sb_free_partitions(struct super_block *sb) | |
303 | { | |
304 | struct udf_sb_info *sbi = UDF_SB(sb); | |
305 | int i; | |
ba2eb866 ME |
306 | |
307 | if (!sbi->s_partmaps) | |
1b1baff6 | 308 | return; |
bff943af JK |
309 | for (i = 0; i < sbi->s_partitions; i++) |
310 | udf_free_partition(&sbi->s_partmaps[i]); | |
311 | kfree(sbi->s_partmaps); | |
312 | sbi->s_partmaps = NULL; | |
313 | } | |
314 | ||
34c80b1d | 315 | static int udf_show_options(struct seq_file *seq, struct dentry *root) |
6da80894 | 316 | { |
34c80b1d | 317 | struct super_block *sb = root->d_sb; |
6da80894 MS |
318 | struct udf_sb_info *sbi = UDF_SB(sb); |
319 | ||
320 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
321 | seq_puts(seq, ",nostrict"); | |
1197e4df | 322 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) |
6da80894 MS |
323 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); |
324 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
325 | seq_puts(seq, ",unhide"); | |
326 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
327 | seq_puts(seq, ",undelete"); | |
328 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
329 | seq_puts(seq, ",noadinicb"); | |
330 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
331 | seq_puts(seq, ",shortad"); | |
332 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
333 | seq_puts(seq, ",uid=forget"); | |
6da80894 MS |
334 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) |
335 | seq_puts(seq, ",gid=forget"); | |
6da80894 | 336 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) |
c2ba138a | 337 | seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid)); |
6da80894 | 338 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) |
c2ba138a | 339 | seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid)); |
6da80894 | 340 | if (sbi->s_umask != 0) |
faa17292 | 341 | seq_printf(seq, ",umask=%ho", sbi->s_umask); |
87bc730c | 342 | if (sbi->s_fmode != UDF_INVALID_MODE) |
faa17292 | 343 | seq_printf(seq, ",mode=%ho", sbi->s_fmode); |
87bc730c | 344 | if (sbi->s_dmode != UDF_INVALID_MODE) |
faa17292 | 345 | seq_printf(seq, ",dmode=%ho", sbi->s_dmode); |
6da80894 | 346 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) |
fcbf7637 | 347 | seq_printf(seq, ",session=%d", sbi->s_session); |
6da80894 MS |
348 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) |
349 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
40346005 JK |
350 | if (sbi->s_anchor != 0) |
351 | seq_printf(seq, ",anchor=%u", sbi->s_anchor); | |
6da80894 MS |
352 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) |
353 | seq_puts(seq, ",utf8"); | |
354 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
355 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
1da177e4 LT |
360 | /* |
361 | * udf_parse_options | |
362 | * | |
363 | * PURPOSE | |
364 | * Parse mount options. | |
365 | * | |
366 | * DESCRIPTION | |
367 | * The following mount options are supported: | |
368 | * | |
369 | * gid= Set the default group. | |
370 | * umask= Set the default umask. | |
7ac9bcd5 MS |
371 | * mode= Set the default file permissions. |
372 | * dmode= Set the default directory permissions. | |
1da177e4 LT |
373 | * uid= Set the default user. |
374 | * bs= Set the block size. | |
375 | * unhide Show otherwise hidden files. | |
376 | * undelete Show deleted files in lists. | |
377 | * adinicb Embed data in the inode (default) | |
378 | * noadinicb Don't embed data in the inode | |
379 | * shortad Use short ad's | |
380 | * longad Use long ad's (default) | |
381 | * nostrict Unset strict conformance | |
382 | * iocharset= Set the NLS character set | |
383 | * | |
384 | * The remaining are for debugging and disaster recovery: | |
385 | * | |
28de7948 | 386 | * novrs Skip volume sequence recognition |
1da177e4 LT |
387 | * |
388 | * The following expect a offset from 0. | |
389 | * | |
390 | * session= Set the CDROM session (default= last session) | |
391 | * anchor= Override standard anchor location. (default= 256) | |
392 | * volume= Override the VolumeDesc location. (unused) | |
393 | * partition= Override the PartitionDesc location. (unused) | |
394 | * lastblock= Set the last block of the filesystem/ | |
395 | * | |
396 | * The following expect a offset from the partition root. | |
397 | * | |
398 | * fileset= Override the fileset block location. (unused) | |
399 | * rootdir= Override the root directory location. (unused) | |
400 | * WARNING: overriding the rootdir to a non-directory may | |
401 | * yield highly unpredictable results. | |
402 | * | |
403 | * PRE-CONDITIONS | |
404 | * options Pointer to mount options string. | |
405 | * uopts Pointer to mount options variable. | |
406 | * | |
407 | * POST-CONDITIONS | |
408 | * <return> 1 Mount options parsed okay. | |
409 | * <return> 0 Error parsing mount options. | |
410 | * | |
411 | * HISTORY | |
412 | * July 1, 1997 - Andrew E. Mileski | |
413 | * Written, tested, and released. | |
414 | */ | |
28de7948 | 415 | |
1da177e4 LT |
416 | enum { |
417 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
418 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
419 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
420 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
421 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
7ac9bcd5 MS |
422 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, |
423 | Opt_fmode, Opt_dmode | |
1da177e4 LT |
424 | }; |
425 | ||
a447c093 | 426 | static const match_table_t tokens = { |
28de7948 CG |
427 | {Opt_novrs, "novrs"}, |
428 | {Opt_nostrict, "nostrict"}, | |
429 | {Opt_bs, "bs=%u"}, | |
430 | {Opt_unhide, "unhide"}, | |
431 | {Opt_undelete, "undelete"}, | |
432 | {Opt_noadinicb, "noadinicb"}, | |
433 | {Opt_adinicb, "adinicb"}, | |
434 | {Opt_shortad, "shortad"}, | |
435 | {Opt_longad, "longad"}, | |
436 | {Opt_uforget, "uid=forget"}, | |
437 | {Opt_uignore, "uid=ignore"}, | |
438 | {Opt_gforget, "gid=forget"}, | |
439 | {Opt_gignore, "gid=ignore"}, | |
440 | {Opt_gid, "gid=%u"}, | |
441 | {Opt_uid, "uid=%u"}, | |
442 | {Opt_umask, "umask=%o"}, | |
443 | {Opt_session, "session=%u"}, | |
444 | {Opt_lastblock, "lastblock=%u"}, | |
445 | {Opt_anchor, "anchor=%u"}, | |
446 | {Opt_volume, "volume=%u"}, | |
447 | {Opt_partition, "partition=%u"}, | |
448 | {Opt_fileset, "fileset=%u"}, | |
449 | {Opt_rootdir, "rootdir=%u"}, | |
450 | {Opt_utf8, "utf8"}, | |
451 | {Opt_iocharset, "iocharset=%s"}, | |
7ac9bcd5 MS |
452 | {Opt_fmode, "mode=%o"}, |
453 | {Opt_dmode, "dmode=%o"}, | |
28de7948 | 454 | {Opt_err, NULL} |
1da177e4 LT |
455 | }; |
456 | ||
6da80894 MS |
457 | static int udf_parse_options(char *options, struct udf_options *uopt, |
458 | bool remount) | |
1da177e4 LT |
459 | { |
460 | char *p; | |
461 | int option; | |
462 | ||
463 | uopt->novrs = 0; | |
1da177e4 LT |
464 | uopt->session = 0xFFFFFFFF; |
465 | uopt->lastblock = 0; | |
466 | uopt->anchor = 0; | |
1da177e4 LT |
467 | |
468 | if (!options) | |
469 | return 1; | |
470 | ||
cb00ea35 | 471 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
472 | substring_t args[MAX_OPT_ARGS]; |
473 | int token; | |
8c6915ae | 474 | unsigned n; |
1da177e4 LT |
475 | if (!*p) |
476 | continue; | |
477 | ||
478 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
479 | switch (token) { |
480 | case Opt_novrs: | |
481 | uopt->novrs = 1; | |
4136801a | 482 | break; |
cb00ea35 CG |
483 | case Opt_bs: |
484 | if (match_int(&args[0], &option)) | |
485 | return 0; | |
8c6915ae FF |
486 | n = option; |
487 | if (n != 512 && n != 1024 && n != 2048 && n != 4096) | |
488 | return 0; | |
489 | uopt->blocksize = n; | |
1197e4df | 490 | uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); |
cb00ea35 CG |
491 | break; |
492 | case Opt_unhide: | |
493 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
494 | break; | |
495 | case Opt_undelete: | |
496 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
497 | break; | |
498 | case Opt_noadinicb: | |
499 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
500 | break; | |
501 | case Opt_adinicb: | |
502 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
503 | break; | |
504 | case Opt_shortad: | |
505 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
506 | break; | |
507 | case Opt_longad: | |
508 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
509 | break; | |
510 | case Opt_gid: | |
511 | if (match_int(args, &option)) | |
512 | return 0; | |
c2ba138a EB |
513 | uopt->gid = make_kgid(current_user_ns(), option); |
514 | if (!gid_valid(uopt->gid)) | |
515 | return 0; | |
ca76d2d8 | 516 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
517 | break; |
518 | case Opt_uid: | |
519 | if (match_int(args, &option)) | |
520 | return 0; | |
c2ba138a EB |
521 | uopt->uid = make_kuid(current_user_ns(), option); |
522 | if (!uid_valid(uopt->uid)) | |
523 | return 0; | |
ca76d2d8 | 524 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
525 | break; |
526 | case Opt_umask: | |
527 | if (match_octal(args, &option)) | |
528 | return 0; | |
529 | uopt->umask = option; | |
530 | break; | |
531 | case Opt_nostrict: | |
532 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
533 | break; | |
534 | case Opt_session: | |
535 | if (match_int(args, &option)) | |
536 | return 0; | |
537 | uopt->session = option; | |
6da80894 MS |
538 | if (!remount) |
539 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
540 | break; |
541 | case Opt_lastblock: | |
542 | if (match_int(args, &option)) | |
543 | return 0; | |
544 | uopt->lastblock = option; | |
6da80894 MS |
545 | if (!remount) |
546 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
547 | break; |
548 | case Opt_anchor: | |
549 | if (match_int(args, &option)) | |
550 | return 0; | |
551 | uopt->anchor = option; | |
552 | break; | |
553 | case Opt_volume: | |
cb00ea35 | 554 | case Opt_partition: |
cb00ea35 | 555 | case Opt_fileset: |
cb00ea35 | 556 | case Opt_rootdir: |
f0c4a817 | 557 | /* Ignored (never implemented properly) */ |
cb00ea35 CG |
558 | break; |
559 | case Opt_utf8: | |
560 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
561 | break; | |
cb00ea35 | 562 | case Opt_iocharset: |
785dffe1 CX |
563 | if (!remount) { |
564 | if (uopt->nls_map) | |
565 | unload_nls(uopt->nls_map); | |
a768a9ab JK |
566 | /* |
567 | * load_nls() failure is handled later in | |
568 | * udf_fill_super() after all options are | |
569 | * parsed. | |
570 | */ | |
785dffe1 CX |
571 | uopt->nls_map = load_nls(args[0].from); |
572 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
573 | } | |
cb00ea35 | 574 | break; |
cb00ea35 CG |
575 | case Opt_uforget: |
576 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
577 | break; | |
70260e44 | 578 | case Opt_uignore: |
cb00ea35 | 579 | case Opt_gignore: |
70260e44 | 580 | /* These options are superseeded by uid=<number> */ |
cb00ea35 CG |
581 | break; |
582 | case Opt_gforget: | |
583 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
584 | break; | |
7ac9bcd5 MS |
585 | case Opt_fmode: |
586 | if (match_octal(args, &option)) | |
587 | return 0; | |
588 | uopt->fmode = option & 0777; | |
589 | break; | |
590 | case Opt_dmode: | |
591 | if (match_octal(args, &option)) | |
592 | return 0; | |
593 | uopt->dmode = option & 0777; | |
594 | break; | |
cb00ea35 | 595 | default: |
78ace70c | 596 | pr_err("bad mount option \"%s\" or missing value\n", p); |
1da177e4 LT |
597 | return 0; |
598 | } | |
599 | } | |
600 | return 1; | |
601 | } | |
602 | ||
cb00ea35 | 603 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
604 | { |
605 | struct udf_options uopt; | |
6c79e987 | 606 | struct udf_sb_info *sbi = UDF_SB(sb); |
c79d967d | 607 | int error = 0; |
a9ad01bc JK |
608 | |
609 | if (!(*flags & SB_RDONLY) && UDF_QUERY_FLAG(sb, UDF_FLAG_RW_INCOMPAT)) | |
610 | return -EACCES; | |
1da177e4 | 611 | |
02b9984d | 612 | sync_filesystem(sb); |
e729eac6 | 613 | |
6c79e987 MS |
614 | uopt.flags = sbi->s_flags; |
615 | uopt.uid = sbi->s_uid; | |
616 | uopt.gid = sbi->s_gid; | |
617 | uopt.umask = sbi->s_umask; | |
7ac9bcd5 MS |
618 | uopt.fmode = sbi->s_fmode; |
619 | uopt.dmode = sbi->s_dmode; | |
785dffe1 | 620 | uopt.nls_map = NULL; |
1da177e4 | 621 | |
6da80894 | 622 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
623 | return -EINVAL; |
624 | ||
c03cad24 | 625 | write_lock(&sbi->s_cred_lock); |
6c79e987 MS |
626 | sbi->s_flags = uopt.flags; |
627 | sbi->s_uid = uopt.uid; | |
628 | sbi->s_gid = uopt.gid; | |
629 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
630 | sbi->s_fmode = uopt.fmode; |
631 | sbi->s_dmode = uopt.dmode; | |
c03cad24 | 632 | write_unlock(&sbi->s_cred_lock); |
1da177e4 | 633 | |
1751e8a6 | 634 | if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb)) |
c79d967d CH |
635 | goto out_unlock; |
636 | ||
1751e8a6 | 637 | if (*flags & SB_RDONLY) |
1da177e4 | 638 | udf_close_lvid(sb); |
36350462 | 639 | else |
1da177e4 LT |
640 | udf_open_lvid(sb); |
641 | ||
c79d967d | 642 | out_unlock: |
c79d967d | 643 | return error; |
1da177e4 LT |
644 | } |
645 | ||
ba54aef0 SM |
646 | /* |
647 | * Check VSD descriptor. Returns -1 in case we are at the end of volume | |
648 | * recognition area, 0 if the descriptor is valid but non-interesting, 1 if | |
649 | * we found one of NSR descriptors we are looking for. | |
650 | */ | |
651 | static int identify_vsd(const struct volStructDesc *vsd) | |
652 | { | |
653 | int ret = 0; | |
654 | ||
655 | if (!memcmp(vsd->stdIdent, VSD_STD_ID_CD001, VSD_STD_ID_LEN)) { | |
656 | switch (vsd->structType) { | |
657 | case 0: | |
658 | udf_debug("ISO9660 Boot Record found\n"); | |
659 | break; | |
660 | case 1: | |
661 | udf_debug("ISO9660 Primary Volume Descriptor found\n"); | |
662 | break; | |
663 | case 2: | |
664 | udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); | |
665 | break; | |
666 | case 3: | |
667 | udf_debug("ISO9660 Volume Partition Descriptor found\n"); | |
668 | break; | |
669 | case 255: | |
670 | udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); | |
671 | break; | |
672 | default: | |
673 | udf_debug("ISO9660 VRS (%u) found\n", vsd->structType); | |
674 | break; | |
675 | } | |
676 | } else if (!memcmp(vsd->stdIdent, VSD_STD_ID_BEA01, VSD_STD_ID_LEN)) | |
677 | ; /* ret = 0 */ | |
678 | else if (!memcmp(vsd->stdIdent, VSD_STD_ID_NSR02, VSD_STD_ID_LEN)) | |
679 | ret = 1; | |
680 | else if (!memcmp(vsd->stdIdent, VSD_STD_ID_NSR03, VSD_STD_ID_LEN)) | |
681 | ret = 1; | |
682 | else if (!memcmp(vsd->stdIdent, VSD_STD_ID_BOOT2, VSD_STD_ID_LEN)) | |
683 | ; /* ret = 0 */ | |
684 | else if (!memcmp(vsd->stdIdent, VSD_STD_ID_CDW02, VSD_STD_ID_LEN)) | |
685 | ; /* ret = 0 */ | |
686 | else { | |
687 | /* TEA01 or invalid id : end of volume recognition area */ | |
688 | ret = -1; | |
689 | } | |
690 | ||
691 | return ret; | |
692 | } | |
693 | ||
694 | /* | |
695 | * Check Volume Structure Descriptors (ECMA 167 2/9.1) | |
696 | * We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) | |
697 | * @return 1 if NSR02 or NSR03 found, | |
698 | * -1 if first sector read error, 0 otherwise | |
699 | */ | |
700 | static int udf_check_vsd(struct super_block *sb) | |
1da177e4 LT |
701 | { |
702 | struct volStructDesc *vsd = NULL; | |
44499602 | 703 | loff_t sector = VSD_FIRST_SECTOR_OFFSET; |
1da177e4 LT |
704 | int sectorsize; |
705 | struct buffer_head *bh = NULL; | |
ba54aef0 | 706 | int nsr = 0; |
6c79e987 | 707 | struct udf_sb_info *sbi; |
1da177e4 | 708 | |
6c79e987 | 709 | sbi = UDF_SB(sb); |
1da177e4 LT |
710 | if (sb->s_blocksize < sizeof(struct volStructDesc)) |
711 | sectorsize = sizeof(struct volStructDesc); | |
712 | else | |
713 | sectorsize = sb->s_blocksize; | |
714 | ||
abdc0eb0 | 715 | sector += (((loff_t)sbi->s_session) << sb->s_blocksize_bits); |
1da177e4 | 716 | |
fcbf7637 | 717 | udf_debug("Starting at sector %u (%lu byte sectors)\n", |
706047a7 SM |
718 | (unsigned int)(sector >> sb->s_blocksize_bits), |
719 | sb->s_blocksize); | |
44499602 PF |
720 | /* Process the sequence (if applicable). The hard limit on the sector |
721 | * offset is arbitrary, hopefully large enough so that all valid UDF | |
722 | * filesystems will be recognised. There is no mention of an upper | |
723 | * bound to the size of the volume recognition area in the standard. | |
724 | * The limit will prevent the code to read all the sectors of a | |
725 | * specially crafted image (like a bluray disc full of CD001 sectors), | |
726 | * potentially causing minutes or even hours of uninterruptible I/O | |
727 | * activity. This actually happened with uninitialised SSD partitions | |
728 | * (all 0xFF) before the check for the limit and all valid IDs were | |
729 | * added */ | |
ba54aef0 | 730 | for (; !nsr && sector < VSD_MAX_SECTOR_OFFSET; sector += sectorsize) { |
1da177e4 LT |
731 | /* Read a block */ |
732 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
733 | if (!bh) | |
734 | break; | |
735 | ||
1da177e4 | 736 | vsd = (struct volStructDesc *)(bh->b_data + |
3a71fc5d | 737 | (sector & (sb->s_blocksize - 1))); |
ba54aef0 | 738 | nsr = identify_vsd(vsd); |
6fbacb85 SM |
739 | /* Found NSR or end? */ |
740 | if (nsr) { | |
741 | brelse(bh); | |
742 | break; | |
743 | } | |
744 | /* | |
745 | * Special handling for improperly formatted VRS (e.g., Win10) | |
746 | * where components are separated by 2048 bytes even though | |
747 | * sectors are 4K | |
748 | */ | |
749 | if (sb->s_blocksize == 4096) { | |
750 | nsr = identify_vsd(vsd + 1); | |
751 | /* Ignore unknown IDs... */ | |
752 | if (nsr < 0) | |
753 | nsr = 0; | |
754 | } | |
3bf25cb4 | 755 | brelse(bh); |
1da177e4 LT |
756 | } |
757 | ||
ba54aef0 SM |
758 | if (nsr > 0) |
759 | return 1; | |
44499602 PF |
760 | else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) == |
761 | VSD_FIRST_SECTOR_OFFSET) | |
1da177e4 LT |
762 | return -1; |
763 | else | |
764 | return 0; | |
765 | } | |
766 | ||
8b47ea6c JK |
767 | static int udf_verify_domain_identifier(struct super_block *sb, |
768 | struct regid *ident, char *dname) | |
769 | { | |
871b9b14 | 770 | struct domainIdentSuffix *suffix; |
8b47ea6c JK |
771 | |
772 | if (memcmp(ident->ident, UDF_ID_COMPLIANT, strlen(UDF_ID_COMPLIANT))) { | |
773 | udf_warn(sb, "Not OSTA UDF compliant %s descriptor.\n", dname); | |
774 | goto force_ro; | |
775 | } | |
49be68c4 | 776 | if (ident->flags & ENTITYID_FLAGS_DIRTY) { |
8b47ea6c JK |
777 | udf_warn(sb, "Possibly not OSTA UDF compliant %s descriptor.\n", |
778 | dname); | |
779 | goto force_ro; | |
780 | } | |
871b9b14 PR |
781 | suffix = (struct domainIdentSuffix *)ident->identSuffix; |
782 | if ((suffix->domainFlags & DOMAIN_FLAGS_HARD_WRITE_PROTECT) || | |
783 | (suffix->domainFlags & DOMAIN_FLAGS_SOFT_WRITE_PROTECT)) { | |
8b47ea6c JK |
784 | if (!sb_rdonly(sb)) { |
785 | udf_warn(sb, "Descriptor for %s marked write protected." | |
786 | " Forcing read only mount.\n", dname); | |
787 | } | |
788 | goto force_ro; | |
789 | } | |
790 | return 0; | |
791 | ||
792 | force_ro: | |
793 | if (!sb_rdonly(sb)) | |
794 | return -EACCES; | |
795 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); | |
796 | return 0; | |
797 | } | |
798 | ||
799 | static int udf_load_fileset(struct super_block *sb, struct fileSetDesc *fset, | |
800 | struct kernel_lb_addr *root) | |
801 | { | |
802 | int ret; | |
803 | ||
804 | ret = udf_verify_domain_identifier(sb, &fset->domainIdent, "file set"); | |
805 | if (ret < 0) | |
806 | return ret; | |
807 | ||
808 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
809 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); | |
810 | ||
811 | udf_debug("Rootdir at block=%u, partition=%u\n", | |
812 | root->logicalBlockNum, root->partitionReferenceNum); | |
813 | return 0; | |
814 | } | |
815 | ||
3a71fc5d | 816 | static int udf_find_fileset(struct super_block *sb, |
5ca4e4be PE |
817 | struct kernel_lb_addr *fileset, |
818 | struct kernel_lb_addr *root) | |
1da177e4 LT |
819 | { |
820 | struct buffer_head *bh = NULL; | |
1da177e4 | 821 | uint16_t ident; |
2dee5aac | 822 | int ret; |
1da177e4 | 823 | |
2dee5aac JK |
824 | if (fileset->logicalBlockNum == 0xFFFFFFFF && |
825 | fileset->partitionReferenceNum == 0xFFFF) | |
826 | return -EINVAL; | |
1da177e4 | 827 | |
2dee5aac JK |
828 | bh = udf_read_ptagged(sb, fileset, 0, &ident); |
829 | if (!bh) | |
830 | return -EIO; | |
831 | if (ident != TAG_IDENT_FSD) { | |
3bf25cb4 | 832 | brelse(bh); |
2dee5aac | 833 | return -EINVAL; |
1da177e4 | 834 | } |
2dee5aac JK |
835 | |
836 | udf_debug("Fileset at block=%u, partition=%u\n", | |
837 | fileset->logicalBlockNum, fileset->partitionReferenceNum); | |
838 | ||
839 | UDF_SB(sb)->s_partition = fileset->partitionReferenceNum; | |
840 | ret = udf_load_fileset(sb, (struct fileSetDesc *)bh->b_data, root); | |
841 | brelse(bh); | |
842 | return ret; | |
1da177e4 LT |
843 | } |
844 | ||
d759bfa4 JK |
845 | /* |
846 | * Load primary Volume Descriptor Sequence | |
847 | * | |
848 | * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence | |
849 | * should be tried. | |
850 | */ | |
c0eb31ed | 851 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
852 | { |
853 | struct primaryVolDesc *pvoldesc; | |
9293fcfb | 854 | uint8_t *outstr; |
c0eb31ed JK |
855 | struct buffer_head *bh; |
856 | uint16_t ident; | |
d759bfa4 | 857 | int ret = -ENOMEM; |
0220edda | 858 | struct timestamp *ts; |
ba9aadd8 | 859 | |
9293fcfb | 860 | outstr = kmalloc(128, GFP_NOFS); |
ba9aadd8 | 861 | if (!outstr) |
9293fcfb | 862 | return -ENOMEM; |
c0eb31ed JK |
863 | |
864 | bh = udf_read_tagged(sb, block, block, &ident); | |
d759bfa4 JK |
865 | if (!bh) { |
866 | ret = -EAGAIN; | |
ba9aadd8 | 867 | goto out2; |
d759bfa4 | 868 | } |
ba9aadd8 | 869 | |
d759bfa4 JK |
870 | if (ident != TAG_IDENT_PVD) { |
871 | ret = -EIO; | |
872 | goto out_bh; | |
873 | } | |
1da177e4 LT |
874 | |
875 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
876 | ||
0220edda DD |
877 | udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
878 | pvoldesc->recordingDateAndTime); | |
0220edda DD |
879 | ts = &pvoldesc->recordingDateAndTime; |
880 | udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", | |
881 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, | |
882 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
1da177e4 | 883 | |
e966fc8d | 884 | ret = udf_dstrCS0toChar(sb, outstr, 31, pvoldesc->volIdent, 32); |
b54e41f5 JK |
885 | if (ret < 0) { |
886 | strcpy(UDF_SB(sb)->s_volume_ident, "InvalidName"); | |
887 | pr_warn("incorrect volume identification, setting to " | |
888 | "'InvalidName'\n"); | |
889 | } else { | |
890 | strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret); | |
891 | } | |
9293fcfb | 892 | udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident); |
1da177e4 | 893 | |
e966fc8d | 894 | ret = udf_dstrCS0toChar(sb, outstr, 127, pvoldesc->volSetIdent, 128); |
b54e41f5 JK |
895 | if (ret < 0) { |
896 | ret = 0; | |
9293fcfb | 897 | goto out_bh; |
b54e41f5 | 898 | } |
9293fcfb AG |
899 | outstr[ret] = 0; |
900 | udf_debug("volSetIdent[] = '%s'\n", outstr); | |
c0eb31ed | 901 | |
ba9aadd8 | 902 | ret = 0; |
d759bfa4 JK |
903 | out_bh: |
904 | brelse(bh); | |
ba9aadd8 MS |
905 | out2: |
906 | kfree(outstr); | |
ba9aadd8 | 907 | return ret; |
1da177e4 LT |
908 | } |
909 | ||
3080a74e | 910 | struct inode *udf_find_metadata_inode_efe(struct super_block *sb, |
7888824b | 911 | u32 meta_file_loc, u32 partition_ref) |
3080a74e NJ |
912 | { |
913 | struct kernel_lb_addr addr; | |
914 | struct inode *metadata_fe; | |
915 | ||
916 | addr.logicalBlockNum = meta_file_loc; | |
7888824b | 917 | addr.partitionReferenceNum = partition_ref; |
3080a74e | 918 | |
6174c2eb | 919 | metadata_fe = udf_iget_special(sb, &addr); |
3080a74e | 920 | |
6d3d5e86 | 921 | if (IS_ERR(metadata_fe)) { |
3080a74e | 922 | udf_warn(sb, "metadata inode efe not found\n"); |
6d3d5e86 JK |
923 | return metadata_fe; |
924 | } | |
925 | if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { | |
3080a74e NJ |
926 | udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); |
927 | iput(metadata_fe); | |
6d3d5e86 | 928 | return ERR_PTR(-EIO); |
3080a74e NJ |
929 | } |
930 | ||
931 | return metadata_fe; | |
932 | } | |
933 | ||
7888824b AT |
934 | static int udf_load_metadata_files(struct super_block *sb, int partition, |
935 | int type1_index) | |
bfb257a5 JK |
936 | { |
937 | struct udf_sb_info *sbi = UDF_SB(sb); | |
938 | struct udf_part_map *map; | |
939 | struct udf_meta_data *mdata; | |
5ca4e4be | 940 | struct kernel_lb_addr addr; |
6d3d5e86 | 941 | struct inode *fe; |
bfb257a5 JK |
942 | |
943 | map = &sbi->s_partmaps[partition]; | |
944 | mdata = &map->s_type_specific.s_metadata; | |
7888824b | 945 | mdata->s_phys_partition_ref = type1_index; |
bfb257a5 JK |
946 | |
947 | /* metadata address */ | |
fcbf7637 | 948 | udf_debug("Metadata file location: block = %u part = %u\n", |
7888824b | 949 | mdata->s_meta_file_loc, mdata->s_phys_partition_ref); |
bfb257a5 | 950 | |
6d3d5e86 | 951 | fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc, |
7888824b | 952 | mdata->s_phys_partition_ref); |
6d3d5e86 | 953 | if (IS_ERR(fe)) { |
3080a74e | 954 | /* mirror file entry */ |
fcbf7637 | 955 | udf_debug("Mirror metadata file location: block = %u part = %u\n", |
7888824b | 956 | mdata->s_mirror_file_loc, mdata->s_phys_partition_ref); |
bfb257a5 | 957 | |
6d3d5e86 | 958 | fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc, |
7888824b | 959 | mdata->s_phys_partition_ref); |
bfb257a5 | 960 | |
6d3d5e86 | 961 | if (IS_ERR(fe)) { |
3080a74e | 962 | udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); |
6d3d5e86 | 963 | return PTR_ERR(fe); |
3080a74e | 964 | } |
6d3d5e86 JK |
965 | mdata->s_mirror_fe = fe; |
966 | } else | |
967 | mdata->s_metadata_fe = fe; | |
968 | ||
bfb257a5 JK |
969 | |
970 | /* | |
971 | * bitmap file entry | |
972 | * Note: | |
973 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) | |
974 | */ | |
975 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { | |
976 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; | |
7888824b | 977 | addr.partitionReferenceNum = mdata->s_phys_partition_ref; |
bfb257a5 | 978 | |
fcbf7637 | 979 | udf_debug("Bitmap file location: block = %u part = %u\n", |
a983f368 | 980 | addr.logicalBlockNum, addr.partitionReferenceNum); |
bfb257a5 | 981 | |
6174c2eb | 982 | fe = udf_iget_special(sb, &addr); |
6d3d5e86 | 983 | if (IS_ERR(fe)) { |
bc98a42c | 984 | if (sb_rdonly(sb)) |
a40ecd7b | 985 | udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); |
bfb257a5 | 986 | else { |
8076c363 | 987 | udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); |
6d3d5e86 | 988 | return PTR_ERR(fe); |
bfb257a5 | 989 | } |
6d3d5e86 JK |
990 | } else |
991 | mdata->s_bitmap_fe = fe; | |
bfb257a5 JK |
992 | } |
993 | ||
994 | udf_debug("udf_load_metadata_files Ok\n"); | |
bfb257a5 | 995 | return 0; |
bfb257a5 JK |
996 | } |
997 | ||
883cb9d1 MS |
998 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
999 | { | |
1000 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
1001 | return DIV_ROUND_UP(map->s_partition_len + |
1002 | (sizeof(struct spaceBitmapDesc) << 3), | |
1003 | sb->s_blocksize * 8); | |
883cb9d1 MS |
1004 | } |
1005 | ||
66e1da3f MS |
1006 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
1007 | { | |
66e1da3f | 1008 | struct udf_bitmap *bitmap; |
256ccb9b | 1009 | int nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f | 1010 | |
256ccb9b DE |
1011 | bitmap = kvzalloc(struct_size(bitmap, s_block_bitmap, nr_groups), |
1012 | GFP_KERNEL); | |
ba2eb866 | 1013 | if (!bitmap) |
66e1da3f | 1014 | return NULL; |
66e1da3f | 1015 | |
66e1da3f MS |
1016 | bitmap->s_nr_groups = nr_groups; |
1017 | return bitmap; | |
1018 | } | |
1019 | ||
b085fbe2 JK |
1020 | static int check_partition_desc(struct super_block *sb, |
1021 | struct partitionDesc *p, | |
1022 | struct udf_part_map *map) | |
1023 | { | |
1024 | bool umap, utable, fmap, ftable; | |
1025 | struct partitionHeaderDesc *phd; | |
1026 | ||
1027 | switch (le32_to_cpu(p->accessType)) { | |
1028 | case PD_ACCESS_TYPE_READ_ONLY: | |
1029 | case PD_ACCESS_TYPE_WRITE_ONCE: | |
b085fbe2 JK |
1030 | case PD_ACCESS_TYPE_NONE: |
1031 | goto force_ro; | |
1032 | } | |
1033 | ||
1034 | /* No Partition Header Descriptor? */ | |
1035 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
1036 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
1037 | goto force_ro; | |
1038 | ||
1039 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1040 | utable = phd->unallocSpaceTable.extLength; | |
1041 | umap = phd->unallocSpaceBitmap.extLength; | |
1042 | ftable = phd->freedSpaceTable.extLength; | |
1043 | fmap = phd->freedSpaceBitmap.extLength; | |
1044 | ||
1045 | /* No allocation info? */ | |
1046 | if (!utable && !umap && !ftable && !fmap) | |
1047 | goto force_ro; | |
1048 | ||
1049 | /* We don't support blocks that require erasing before overwrite */ | |
1050 | if (ftable || fmap) | |
1051 | goto force_ro; | |
1052 | /* UDF 2.60: 2.3.3 - no mixing of tables & bitmaps, no VAT. */ | |
1053 | if (utable && umap) | |
1054 | goto force_ro; | |
1055 | ||
1056 | if (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
57debb81 PR |
1057 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
1058 | map->s_partition_type == UDF_METADATA_MAP25) | |
b085fbe2 JK |
1059 | goto force_ro; |
1060 | ||
1061 | return 0; | |
1062 | force_ro: | |
1063 | if (!sb_rdonly(sb)) | |
1064 | return -EACCES; | |
1065 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); | |
1066 | return 0; | |
1067 | } | |
1068 | ||
3fb38dfa JK |
1069 | static int udf_fill_partdesc_info(struct super_block *sb, |
1070 | struct partitionDesc *p, int p_index) | |
1da177e4 | 1071 | { |
6c79e987 | 1072 | struct udf_part_map *map; |
165923fa | 1073 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 1074 | struct partitionHeaderDesc *phd; |
b085fbe2 | 1075 | int err; |
165923fa | 1076 | |
3fb38dfa | 1077 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
1078 | |
1079 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
1080 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
1081 | ||
1082 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
1083 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
1084 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
1085 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
1086 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
1087 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
1088 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
1089 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
1090 | ||
fcbf7637 | 1091 | udf_debug("Partition (%d type %x) starts at physical %u, block length %u\n", |
a983f368 JP |
1092 | p_index, map->s_partition_type, |
1093 | map->s_partition_root, map->s_partition_len); | |
165923fa | 1094 | |
b085fbe2 JK |
1095 | err = check_partition_desc(sb, p, map); |
1096 | if (err) | |
1097 | return err; | |
1098 | ||
1099 | /* | |
1100 | * Skip loading allocation info it we cannot ever write to the fs. | |
1101 | * This is a correctness thing as we may have decided to force ro mount | |
1102 | * to avoid allocation info we don't support. | |
1103 | */ | |
1104 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_RW_INCOMPAT)) | |
3fb38dfa | 1105 | return 0; |
165923fa MS |
1106 | |
1107 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1108 | if (phd->unallocSpaceTable.extLength) { | |
5ca4e4be | 1109 | struct kernel_lb_addr loc = { |
165923fa MS |
1110 | .logicalBlockNum = le32_to_cpu( |
1111 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 1112 | .partitionReferenceNum = p_index, |
165923fa | 1113 | }; |
6d3d5e86 | 1114 | struct inode *inode; |
165923fa | 1115 | |
6174c2eb | 1116 | inode = udf_iget_special(sb, &loc); |
6d3d5e86 | 1117 | if (IS_ERR(inode)) { |
165923fa | 1118 | udf_debug("cannot load unallocSpaceTable (part %d)\n", |
a983f368 | 1119 | p_index); |
6d3d5e86 | 1120 | return PTR_ERR(inode); |
165923fa | 1121 | } |
6d3d5e86 | 1122 | map->s_uspace.s_table = inode; |
165923fa | 1123 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; |
fcbf7637 | 1124 | udf_debug("unallocSpaceTable (part %d) @ %lu\n", |
a983f368 | 1125 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1126 | } |
1127 | ||
1128 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1129 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1130 | if (!bitmap) | |
d759bfa4 | 1131 | return -ENOMEM; |
165923fa | 1132 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1133 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1134 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1135 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
fcbf7637 | 1136 | udf_debug("unallocSpaceBitmap (part %d) @ %u\n", |
a983f368 | 1137 | p_index, bitmap->s_extPosition); |
165923fa MS |
1138 | } |
1139 | ||
3fb38dfa JK |
1140 | return 0; |
1141 | } | |
1142 | ||
e971b0b9 JK |
1143 | static void udf_find_vat_block(struct super_block *sb, int p_index, |
1144 | int type1_index, sector_t start_block) | |
38b74a53 JK |
1145 | { |
1146 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1147 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
e971b0b9 | 1148 | sector_t vat_block; |
5ca4e4be | 1149 | struct kernel_lb_addr ino; |
6d3d5e86 | 1150 | struct inode *inode; |
e971b0b9 JK |
1151 | |
1152 | /* | |
1153 | * VAT file entry is in the last recorded block. Some broken disks have | |
1154 | * it a few blocks before so try a bit harder... | |
1155 | */ | |
1156 | ino.partitionReferenceNum = type1_index; | |
1157 | for (vat_block = start_block; | |
1158 | vat_block >= map->s_partition_root && | |
6d3d5e86 | 1159 | vat_block >= start_block - 3; vat_block--) { |
e971b0b9 | 1160 | ino.logicalBlockNum = vat_block - map->s_partition_root; |
6174c2eb | 1161 | inode = udf_iget_special(sb, &ino); |
6d3d5e86 JK |
1162 | if (!IS_ERR(inode)) { |
1163 | sbi->s_vat_inode = inode; | |
1164 | break; | |
1165 | } | |
e971b0b9 JK |
1166 | } |
1167 | } | |
1168 | ||
1169 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) | |
1170 | { | |
1171 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1172 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
fa5e0815 JK |
1173 | struct buffer_head *bh = NULL; |
1174 | struct udf_inode_info *vati; | |
1175 | uint32_t pos; | |
1176 | struct virtualAllocationTable20 *vat20; | |
23bcda11 FF |
1177 | sector_t blocks = i_size_read(sb->s_bdev->bd_inode) >> |
1178 | sb->s_blocksize_bits; | |
38b74a53 | 1179 | |
e971b0b9 | 1180 | udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); |
4bf17af0 JK |
1181 | if (!sbi->s_vat_inode && |
1182 | sbi->s_last_block != blocks - 1) { | |
78ace70c JP |
1183 | pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", |
1184 | (unsigned long)sbi->s_last_block, | |
1185 | (unsigned long)blocks - 1); | |
e971b0b9 | 1186 | udf_find_vat_block(sb, p_index, type1_index, blocks - 1); |
4bf17af0 | 1187 | } |
38b74a53 | 1188 | if (!sbi->s_vat_inode) |
d759bfa4 | 1189 | return -EIO; |
38b74a53 JK |
1190 | |
1191 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
47c9358a | 1192 | map->s_type_specific.s_virtual.s_start_offset = 0; |
38b74a53 JK |
1193 | map->s_type_specific.s_virtual.s_num_entries = |
1194 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1195 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
fa5e0815 JK |
1196 | vati = UDF_I(sbi->s_vat_inode); |
1197 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1198 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1199 | bh = sb_bread(sb, pos); | |
1200 | if (!bh) | |
d759bfa4 | 1201 | return -EIO; |
fa5e0815 JK |
1202 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; |
1203 | } else { | |
1204 | vat20 = (struct virtualAllocationTable20 *) | |
1205 | vati->i_ext.i_data; | |
1206 | } | |
38b74a53 | 1207 | |
38b74a53 | 1208 | map->s_type_specific.s_virtual.s_start_offset = |
47c9358a | 1209 | le16_to_cpu(vat20->lengthHeader); |
38b74a53 JK |
1210 | map->s_type_specific.s_virtual.s_num_entries = |
1211 | (sbi->s_vat_inode->i_size - | |
1212 | map->s_type_specific.s_virtual. | |
1213 | s_start_offset) >> 2; | |
1214 | brelse(bh); | |
1215 | } | |
1216 | return 0; | |
1217 | } | |
1218 | ||
d759bfa4 JK |
1219 | /* |
1220 | * Load partition descriptor block | |
1221 | * | |
1222 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor | |
1223 | * sequence. | |
1224 | */ | |
3fb38dfa JK |
1225 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
1226 | { | |
1227 | struct buffer_head *bh; | |
1228 | struct partitionDesc *p; | |
1229 | struct udf_part_map *map; | |
1230 | struct udf_sb_info *sbi = UDF_SB(sb); | |
38b74a53 | 1231 | int i, type1_idx; |
3fb38dfa JK |
1232 | uint16_t partitionNumber; |
1233 | uint16_t ident; | |
d759bfa4 | 1234 | int ret; |
3fb38dfa JK |
1235 | |
1236 | bh = udf_read_tagged(sb, block, block, &ident); | |
1237 | if (!bh) | |
d759bfa4 JK |
1238 | return -EAGAIN; |
1239 | if (ident != TAG_IDENT_PD) { | |
1240 | ret = 0; | |
3fb38dfa | 1241 | goto out_bh; |
d759bfa4 | 1242 | } |
3fb38dfa JK |
1243 | |
1244 | p = (struct partitionDesc *)bh->b_data; | |
1245 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
38b74a53 | 1246 | |
7888824b | 1247 | /* First scan for TYPE1 and SPARABLE partitions */ |
3fb38dfa JK |
1248 | for (i = 0; i < sbi->s_partitions; i++) { |
1249 | map = &sbi->s_partmaps[i]; | |
fcbf7637 | 1250 | udf_debug("Searching map: (%u == %u)\n", |
3fb38dfa | 1251 | map->s_partition_num, partitionNumber); |
38b74a53 JK |
1252 | if (map->s_partition_num == partitionNumber && |
1253 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1254 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
3fb38dfa JK |
1255 | break; |
1256 | } | |
1257 | ||
38b74a53 | 1258 | if (i >= sbi->s_partitions) { |
fcbf7637 | 1259 | udf_debug("Partition (%u) not found in partition map\n", |
3fb38dfa | 1260 | partitionNumber); |
d759bfa4 | 1261 | ret = 0; |
3fb38dfa JK |
1262 | goto out_bh; |
1263 | } | |
165923fa | 1264 | |
3fb38dfa | 1265 | ret = udf_fill_partdesc_info(sb, p, i); |
d759bfa4 JK |
1266 | if (ret < 0) |
1267 | goto out_bh; | |
38b74a53 JK |
1268 | |
1269 | /* | |
bfb257a5 JK |
1270 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
1271 | * PHYSICAL partitions are already set up | |
38b74a53 JK |
1272 | */ |
1273 | type1_idx = i; | |
44499602 | 1274 | map = NULL; /* supress 'maybe used uninitialized' warning */ |
38b74a53 JK |
1275 | for (i = 0; i < sbi->s_partitions; i++) { |
1276 | map = &sbi->s_partmaps[i]; | |
1277 | ||
1278 | if (map->s_partition_num == partitionNumber && | |
1279 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
bfb257a5 JK |
1280 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
1281 | map->s_partition_type == UDF_METADATA_MAP25)) | |
38b74a53 JK |
1282 | break; |
1283 | } | |
1284 | ||
d759bfa4 JK |
1285 | if (i >= sbi->s_partitions) { |
1286 | ret = 0; | |
38b74a53 | 1287 | goto out_bh; |
d759bfa4 | 1288 | } |
38b74a53 JK |
1289 | |
1290 | ret = udf_fill_partdesc_info(sb, p, i); | |
d759bfa4 | 1291 | if (ret < 0) |
38b74a53 JK |
1292 | goto out_bh; |
1293 | ||
bfb257a5 | 1294 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
7888824b | 1295 | ret = udf_load_metadata_files(sb, i, type1_idx); |
d759bfa4 | 1296 | if (ret < 0) { |
78ace70c JP |
1297 | udf_err(sb, "error loading MetaData partition map %d\n", |
1298 | i); | |
bfb257a5 JK |
1299 | goto out_bh; |
1300 | } | |
1301 | } else { | |
e729eac6 JK |
1302 | /* |
1303 | * If we have a partition with virtual map, we don't handle | |
1304 | * writing to it (we overwrite blocks instead of relocating | |
1305 | * them). | |
1306 | */ | |
bc98a42c | 1307 | if (!sb_rdonly(sb)) { |
e729eac6 JK |
1308 | ret = -EACCES; |
1309 | goto out_bh; | |
1310 | } | |
a9ad01bc | 1311 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); |
bfb257a5 | 1312 | ret = udf_load_vat(sb, i, type1_idx); |
d759bfa4 | 1313 | if (ret < 0) |
bfb257a5 | 1314 | goto out_bh; |
bfb257a5 | 1315 | } |
d759bfa4 | 1316 | ret = 0; |
c0eb31ed | 1317 | out_bh: |
2e0838fd | 1318 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1319 | brelse(bh); |
1320 | return ret; | |
1da177e4 LT |
1321 | } |
1322 | ||
1df2ae31 JK |
1323 | static int udf_load_sparable_map(struct super_block *sb, |
1324 | struct udf_part_map *map, | |
1325 | struct sparablePartitionMap *spm) | |
1326 | { | |
1327 | uint32_t loc; | |
1328 | uint16_t ident; | |
1329 | struct sparingTable *st; | |
1330 | struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing; | |
1331 | int i; | |
1332 | struct buffer_head *bh; | |
1333 | ||
1334 | map->s_partition_type = UDF_SPARABLE_MAP15; | |
1335 | sdata->s_packet_len = le16_to_cpu(spm->packetLength); | |
1336 | if (!is_power_of_2(sdata->s_packet_len)) { | |
1337 | udf_err(sb, "error loading logical volume descriptor: " | |
1338 | "Invalid packet length %u\n", | |
1339 | (unsigned)sdata->s_packet_len); | |
1340 | return -EIO; | |
1341 | } | |
1342 | if (spm->numSparingTables > 4) { | |
1343 | udf_err(sb, "error loading logical volume descriptor: " | |
1344 | "Too many sparing tables (%d)\n", | |
1345 | (int)spm->numSparingTables); | |
1346 | return -EIO; | |
1347 | } | |
1348 | ||
1349 | for (i = 0; i < spm->numSparingTables; i++) { | |
1350 | loc = le32_to_cpu(spm->locSparingTable[i]); | |
1351 | bh = udf_read_tagged(sb, loc, loc, &ident); | |
1352 | if (!bh) | |
1353 | continue; | |
1354 | ||
1355 | st = (struct sparingTable *)bh->b_data; | |
1356 | if (ident != 0 || | |
1357 | strncmp(st->sparingIdent.ident, UDF_ID_SPARING, | |
1358 | strlen(UDF_ID_SPARING)) || | |
1359 | sizeof(*st) + le16_to_cpu(st->reallocationTableLen) > | |
1360 | sb->s_blocksize) { | |
1361 | brelse(bh); | |
1362 | continue; | |
1363 | } | |
1364 | ||
1365 | sdata->s_spar_map[i] = bh; | |
1366 | } | |
1367 | map->s_partition_func = udf_get_pblock_spar15; | |
1368 | return 0; | |
1369 | } | |
1370 | ||
c0eb31ed | 1371 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
5ca4e4be | 1372 | struct kernel_lb_addr *fileset) |
1da177e4 LT |
1373 | { |
1374 | struct logicalVolDesc *lvd; | |
1df2ae31 | 1375 | int i, offset; |
1da177e4 | 1376 | uint8_t type; |
6c79e987 | 1377 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1378 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1379 | uint16_t ident; |
1380 | struct buffer_head *bh; | |
adee11b2 | 1381 | unsigned int table_len; |
d759bfa4 | 1382 | int ret; |
1da177e4 | 1383 | |
c0eb31ed JK |
1384 | bh = udf_read_tagged(sb, block, block, &ident); |
1385 | if (!bh) | |
d759bfa4 | 1386 | return -EAGAIN; |
c0eb31ed | 1387 | BUG_ON(ident != TAG_IDENT_LVD); |
1da177e4 | 1388 | lvd = (struct logicalVolDesc *)bh->b_data; |
adee11b2 | 1389 | table_len = le32_to_cpu(lvd->mapTableLength); |
57b9655d | 1390 | if (table_len > sb->s_blocksize - sizeof(*lvd)) { |
adee11b2 JK |
1391 | udf_err(sb, "error loading logical volume descriptor: " |
1392 | "Partition table too long (%u > %lu)\n", table_len, | |
1393 | sb->s_blocksize - sizeof(*lvd)); | |
d759bfa4 | 1394 | ret = -EIO; |
adee11b2 JK |
1395 | goto out_bh; |
1396 | } | |
1da177e4 | 1397 | |
2dee5aac JK |
1398 | ret = udf_verify_domain_identifier(sb, &lvd->domainIdent, |
1399 | "logical volume"); | |
1400 | if (ret) | |
1401 | goto out_bh; | |
cb14d340 JK |
1402 | ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
1403 | if (ret) | |
c0eb31ed | 1404 | goto out_bh; |
1da177e4 | 1405 | |
cb00ea35 | 1406 | for (i = 0, offset = 0; |
adee11b2 | 1407 | i < sbi->s_partitions && offset < table_len; |
4b11111a MS |
1408 | i++, offset += gpm->partitionMapLength) { |
1409 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1410 | gpm = (struct genericPartitionMap *) | |
1411 | &(lvd->partitionMaps[offset]); | |
1412 | type = gpm->partitionMapType; | |
cb00ea35 | 1413 | if (type == 1) { |
4b11111a MS |
1414 | struct genericPartitionMap1 *gpm1 = |
1415 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1416 | map->s_partition_type = UDF_TYPE1_MAP15; |
1417 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1418 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1419 | map->s_partition_func = NULL; | |
cb00ea35 | 1420 | } else if (type == 2) { |
4b11111a MS |
1421 | struct udfPartitionMap2 *upm2 = |
1422 | (struct udfPartitionMap2 *)gpm; | |
1423 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1424 | strlen(UDF_ID_VIRTUAL))) { | |
1425 | u16 suf = | |
1426 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1427 | identSuffix)[0]); | |
c82a1275 | 1428 | if (suf < 0x0200) { |
4b11111a MS |
1429 | map->s_partition_type = |
1430 | UDF_VIRTUAL_MAP15; | |
1431 | map->s_partition_func = | |
1432 | udf_get_pblock_virt15; | |
c82a1275 | 1433 | } else { |
4b11111a MS |
1434 | map->s_partition_type = |
1435 | UDF_VIRTUAL_MAP20; | |
1436 | map->s_partition_func = | |
1437 | udf_get_pblock_virt20; | |
1da177e4 | 1438 | } |
4b11111a MS |
1439 | } else if (!strncmp(upm2->partIdent.ident, |
1440 | UDF_ID_SPARABLE, | |
1441 | strlen(UDF_ID_SPARABLE))) { | |
d759bfa4 JK |
1442 | ret = udf_load_sparable_map(sb, map, |
1443 | (struct sparablePartitionMap *)gpm); | |
1444 | if (ret < 0) | |
1df2ae31 | 1445 | goto out_bh; |
bfb257a5 JK |
1446 | } else if (!strncmp(upm2->partIdent.ident, |
1447 | UDF_ID_METADATA, | |
1448 | strlen(UDF_ID_METADATA))) { | |
1449 | struct udf_meta_data *mdata = | |
1450 | &map->s_type_specific.s_metadata; | |
1451 | struct metadataPartitionMap *mdm = | |
1452 | (struct metadataPartitionMap *) | |
1453 | &(lvd->partitionMaps[offset]); | |
fcbf7637 | 1454 | udf_debug("Parsing Logical vol part %d type %u id=%s\n", |
a983f368 | 1455 | i, type, UDF_ID_METADATA); |
bfb257a5 JK |
1456 | |
1457 | map->s_partition_type = UDF_METADATA_MAP25; | |
1458 | map->s_partition_func = udf_get_pblock_meta25; | |
1459 | ||
1460 | mdata->s_meta_file_loc = | |
1461 | le32_to_cpu(mdm->metadataFileLoc); | |
1462 | mdata->s_mirror_file_loc = | |
1463 | le32_to_cpu(mdm->metadataMirrorFileLoc); | |
1464 | mdata->s_bitmap_file_loc = | |
1465 | le32_to_cpu(mdm->metadataBitmapFileLoc); | |
1466 | mdata->s_alloc_unit_size = | |
1467 | le32_to_cpu(mdm->allocUnitSize); | |
1468 | mdata->s_align_unit_size = | |
1469 | le16_to_cpu(mdm->alignUnitSize); | |
ed47a7d0 JK |
1470 | if (mdm->flags & 0x01) |
1471 | mdata->s_flags |= MF_DUPLICATE_MD; | |
bfb257a5 JK |
1472 | |
1473 | udf_debug("Metadata Ident suffix=0x%x\n", | |
a983f368 JP |
1474 | le16_to_cpu(*(__le16 *) |
1475 | mdm->partIdent.identSuffix)); | |
fcbf7637 | 1476 | udf_debug("Metadata part num=%u\n", |
a983f368 | 1477 | le16_to_cpu(mdm->partitionNum)); |
fcbf7637 | 1478 | udf_debug("Metadata part alloc unit size=%u\n", |
a983f368 | 1479 | le32_to_cpu(mdm->allocUnitSize)); |
fcbf7637 | 1480 | udf_debug("Metadata file loc=%u\n", |
a983f368 | 1481 | le32_to_cpu(mdm->metadataFileLoc)); |
fcbf7637 | 1482 | udf_debug("Mirror file loc=%u\n", |
a983f368 | 1483 | le32_to_cpu(mdm->metadataMirrorFileLoc)); |
fcbf7637 | 1484 | udf_debug("Bitmap file loc=%u\n", |
a983f368 | 1485 | le32_to_cpu(mdm->metadataBitmapFileLoc)); |
fcbf7637 | 1486 | udf_debug("Flags: %d %u\n", |
ed47a7d0 | 1487 | mdata->s_flags, mdm->flags); |
cb00ea35 | 1488 | } else { |
3a71fc5d MS |
1489 | udf_debug("Unknown ident: %s\n", |
1490 | upm2->partIdent.ident); | |
1da177e4 LT |
1491 | continue; |
1492 | } | |
6c79e987 MS |
1493 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1494 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 | 1495 | } |
fcbf7637 | 1496 | udf_debug("Partition (%d:%u) type %u on volume %u\n", |
a983f368 | 1497 | i, map->s_partition_num, type, map->s_volumeseqnum); |
1da177e4 LT |
1498 | } |
1499 | ||
cb00ea35 | 1500 | if (fileset) { |
5ca4e4be | 1501 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1502 | |
1503 | *fileset = lelb_to_cpu(la->extLocation); | |
fcbf7637 | 1504 | udf_debug("FileSet found in LogicalVolDesc at block=%u, partition=%u\n", |
a983f368 | 1505 | fileset->logicalBlockNum, |
28de7948 | 1506 | fileset->partitionReferenceNum); |
1da177e4 LT |
1507 | } |
1508 | if (lvd->integritySeqExt.extLength) | |
1509 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
d759bfa4 | 1510 | ret = 0; |
4f5edd82 SM |
1511 | |
1512 | if (!sbi->s_lvid_bh) { | |
1513 | /* We can't generate unique IDs without a valid LVID */ | |
1514 | if (sb_rdonly(sb)) { | |
1515 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); | |
1516 | } else { | |
1517 | udf_warn(sb, "Damaged or missing LVID, forcing " | |
1518 | "readonly mount\n"); | |
1519 | ret = -EACCES; | |
1520 | } | |
1521 | } | |
c0eb31ed JK |
1522 | out_bh: |
1523 | brelse(bh); | |
1524 | return ret; | |
1da177e4 LT |
1525 | } |
1526 | ||
1527 | /* | |
a47241cd | 1528 | * Find the prevailing Logical Volume Integrity Descriptor. |
1da177e4 | 1529 | */ |
5ca4e4be | 1530 | static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) |
1da177e4 | 1531 | { |
a47241cd | 1532 | struct buffer_head *bh, *final_bh; |
1da177e4 | 1533 | uint16_t ident; |
6c79e987 MS |
1534 | struct udf_sb_info *sbi = UDF_SB(sb); |
1535 | struct logicalVolIntegrityDesc *lvid; | |
a47241cd AT |
1536 | int indirections = 0; |
1537 | ||
1538 | while (++indirections <= UDF_MAX_LVID_NESTING) { | |
1539 | final_bh = NULL; | |
1540 | while (loc.extLength > 0 && | |
1541 | (bh = udf_read_tagged(sb, loc.extLocation, | |
1542 | loc.extLocation, &ident))) { | |
1543 | if (ident != TAG_IDENT_LVID) { | |
1544 | brelse(bh); | |
1545 | break; | |
1546 | } | |
1547 | ||
1548 | brelse(final_bh); | |
1549 | final_bh = bh; | |
1da177e4 | 1550 | |
a47241cd AT |
1551 | loc.extLength -= sb->s_blocksize; |
1552 | loc.extLocation++; | |
1553 | } | |
cb00ea35 | 1554 | |
a47241cd AT |
1555 | if (!final_bh) |
1556 | return; | |
cb00ea35 | 1557 | |
a47241cd AT |
1558 | brelse(sbi->s_lvid_bh); |
1559 | sbi->s_lvid_bh = final_bh; | |
1560 | ||
1561 | lvid = (struct logicalVolIntegrityDesc *)final_bh->b_data; | |
1562 | if (lvid->nextIntegrityExt.extLength == 0) | |
1563 | return; | |
1564 | ||
1565 | loc = leea_to_cpu(lvid->nextIntegrityExt); | |
1da177e4 | 1566 | } |
a47241cd AT |
1567 | |
1568 | udf_warn(sb, "Too many LVID indirections (max %u), ignoring.\n", | |
1569 | UDF_MAX_LVID_NESTING); | |
1570 | brelse(sbi->s_lvid_bh); | |
1571 | sbi->s_lvid_bh = NULL; | |
1da177e4 LT |
1572 | } |
1573 | ||
7b78fd02 JK |
1574 | /* |
1575 | * Step for reallocation of table of partition descriptor sequence numbers. | |
1576 | * Must be power of 2. | |
1577 | */ | |
1578 | #define PART_DESC_ALLOC_STEP 32 | |
1579 | ||
ee4af50c JK |
1580 | struct part_desc_seq_scan_data { |
1581 | struct udf_vds_record rec; | |
1582 | u32 partnum; | |
1583 | }; | |
1584 | ||
7b78fd02 JK |
1585 | struct desc_seq_scan_data { |
1586 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
1587 | unsigned int size_part_descs; | |
ee4af50c JK |
1588 | unsigned int num_part_descs; |
1589 | struct part_desc_seq_scan_data *part_descs_loc; | |
7b78fd02 JK |
1590 | }; |
1591 | ||
1592 | static struct udf_vds_record *handle_partition_descriptor( | |
1593 | struct buffer_head *bh, | |
1594 | struct desc_seq_scan_data *data) | |
1595 | { | |
1596 | struct partitionDesc *desc = (struct partitionDesc *)bh->b_data; | |
1597 | int partnum; | |
ee4af50c | 1598 | int i; |
7b78fd02 JK |
1599 | |
1600 | partnum = le16_to_cpu(desc->partitionNumber); | |
ee4af50c JK |
1601 | for (i = 0; i < data->num_part_descs; i++) |
1602 | if (partnum == data->part_descs_loc[i].partnum) | |
1603 | return &(data->part_descs_loc[i].rec); | |
1604 | if (data->num_part_descs >= data->size_part_descs) { | |
1605 | struct part_desc_seq_scan_data *new_loc; | |
7b78fd02 JK |
1606 | unsigned int new_size = ALIGN(partnum, PART_DESC_ALLOC_STEP); |
1607 | ||
6396bb22 | 1608 | new_loc = kcalloc(new_size, sizeof(*new_loc), GFP_KERNEL); |
7b78fd02 JK |
1609 | if (!new_loc) |
1610 | return ERR_PTR(-ENOMEM); | |
1611 | memcpy(new_loc, data->part_descs_loc, | |
1612 | data->size_part_descs * sizeof(*new_loc)); | |
1613 | kfree(data->part_descs_loc); | |
1614 | data->part_descs_loc = new_loc; | |
1615 | data->size_part_descs = new_size; | |
1616 | } | |
ee4af50c | 1617 | return &(data->part_descs_loc[data->num_part_descs++].rec); |
7b78fd02 JK |
1618 | } |
1619 | ||
1620 | ||
1621 | static struct udf_vds_record *get_volume_descriptor_record(uint16_t ident, | |
1622 | struct buffer_head *bh, struct desc_seq_scan_data *data) | |
18cf4781 JK |
1623 | { |
1624 | switch (ident) { | |
1625 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ | |
7b78fd02 | 1626 | return &(data->vds[VDS_POS_PRIMARY_VOL_DESC]); |
18cf4781 | 1627 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
7b78fd02 | 1628 | return &(data->vds[VDS_POS_IMP_USE_VOL_DESC]); |
18cf4781 | 1629 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
7b78fd02 | 1630 | return &(data->vds[VDS_POS_LOGICAL_VOL_DESC]); |
18cf4781 | 1631 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
7b78fd02 JK |
1632 | return &(data->vds[VDS_POS_UNALLOC_SPACE_DESC]); |
1633 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ | |
1634 | return handle_partition_descriptor(bh, data); | |
18cf4781 JK |
1635 | } |
1636 | return NULL; | |
1637 | } | |
e7a4eb86 | 1638 | |
1da177e4 | 1639 | /* |
d759bfa4 JK |
1640 | * Process a main/reserve volume descriptor sequence. |
1641 | * @block First block of first extent of the sequence. | |
1642 | * @lastblock Lastblock of first extent of the sequence. | |
1643 | * @fileset There we store extent containing root fileset | |
1da177e4 | 1644 | * |
d759bfa4 JK |
1645 | * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor |
1646 | * sequence | |
1da177e4 | 1647 | */ |
d759bfa4 JK |
1648 | static noinline int udf_process_sequence( |
1649 | struct super_block *sb, | |
1650 | sector_t block, sector_t lastblock, | |
1651 | struct kernel_lb_addr *fileset) | |
1da177e4 LT |
1652 | { |
1653 | struct buffer_head *bh = NULL; | |
4b11111a | 1654 | struct udf_vds_record *curr; |
1da177e4 LT |
1655 | struct generic_desc *gd; |
1656 | struct volDescPtr *vdp; | |
2b8f9421 | 1657 | bool done = false; |
1da177e4 LT |
1658 | uint32_t vdsn; |
1659 | uint16_t ident; | |
d759bfa4 | 1660 | int ret; |
e7a4eb86 | 1661 | unsigned int indirections = 0; |
7b78fd02 JK |
1662 | struct desc_seq_scan_data data; |
1663 | unsigned int i; | |
1664 | ||
1665 | memset(data.vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1666 | data.size_part_descs = PART_DESC_ALLOC_STEP; | |
ee4af50c | 1667 | data.num_part_descs = 0; |
6396bb22 KC |
1668 | data.part_descs_loc = kcalloc(data.size_part_descs, |
1669 | sizeof(*data.part_descs_loc), | |
1670 | GFP_KERNEL); | |
7b78fd02 JK |
1671 | if (!data.part_descs_loc) |
1672 | return -ENOMEM; | |
1da177e4 | 1673 | |
c0eb31ed JK |
1674 | /* |
1675 | * Read the main descriptor sequence and find which descriptors | |
1676 | * are in it. | |
1677 | */ | |
cb00ea35 | 1678 | for (; (!done && block <= lastblock); block++) { |
1da177e4 | 1679 | bh = udf_read_tagged(sb, block, block, &ident); |
67621675 JK |
1680 | if (!bh) |
1681 | break; | |
1da177e4 LT |
1682 | |
1683 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1684 | gd = (struct generic_desc *)bh->b_data; | |
1685 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1686 | switch (ident) { |
28de7948 | 1687 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
7b568cba JK |
1688 | if (++indirections > UDF_MAX_TD_NESTING) { |
1689 | udf_err(sb, "too many Volume Descriptor " | |
1690 | "Pointers (max %u supported)\n", | |
1691 | UDF_MAX_TD_NESTING); | |
1692 | brelse(bh); | |
1693 | return -EIO; | |
cb00ea35 | 1694 | } |
7b568cba JK |
1695 | |
1696 | vdp = (struct volDescPtr *)bh->b_data; | |
1697 | block = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation); | |
1698 | lastblock = le32_to_cpu( | |
1699 | vdp->nextVolDescSeqExt.extLength) >> | |
1700 | sb->s_blocksize_bits; | |
1701 | lastblock += block - 1; | |
1702 | /* For loop is going to increment 'block' again */ | |
1703 | block--; | |
cb00ea35 | 1704 | break; |
18cf4781 | 1705 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
28de7948 | 1706 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
18cf4781 JK |
1707 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
1708 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ | |
7b78fd02 JK |
1709 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
1710 | curr = get_volume_descriptor_record(ident, bh, &data); | |
1711 | if (IS_ERR(curr)) { | |
1712 | brelse(bh); | |
1713 | return PTR_ERR(curr); | |
1714 | } | |
1715 | /* Descriptor we don't care about? */ | |
1716 | if (!curr) | |
1717 | break; | |
4b11111a MS |
1718 | if (vdsn >= curr->volDescSeqNum) { |
1719 | curr->volDescSeqNum = vdsn; | |
1720 | curr->block = block; | |
cb00ea35 CG |
1721 | } |
1722 | break; | |
28de7948 | 1723 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
7b568cba | 1724 | done = true; |
cb00ea35 | 1725 | break; |
1da177e4 | 1726 | } |
3bf25cb4 | 1727 | brelse(bh); |
1da177e4 | 1728 | } |
c0eb31ed JK |
1729 | /* |
1730 | * Now read interesting descriptors again and process them | |
1731 | * in a suitable order | |
1732 | */ | |
7b78fd02 | 1733 | if (!data.vds[VDS_POS_PRIMARY_VOL_DESC].block) { |
78ace70c | 1734 | udf_err(sb, "Primary Volume Descriptor not found!\n"); |
d759bfa4 JK |
1735 | return -EAGAIN; |
1736 | } | |
7b78fd02 | 1737 | ret = udf_load_pvoldesc(sb, data.vds[VDS_POS_PRIMARY_VOL_DESC].block); |
d759bfa4 JK |
1738 | if (ret < 0) |
1739 | return ret; | |
1740 | ||
7b78fd02 | 1741 | if (data.vds[VDS_POS_LOGICAL_VOL_DESC].block) { |
d759bfa4 | 1742 | ret = udf_load_logicalvol(sb, |
7b78fd02 JK |
1743 | data.vds[VDS_POS_LOGICAL_VOL_DESC].block, |
1744 | fileset); | |
d759bfa4 JK |
1745 | if (ret < 0) |
1746 | return ret; | |
c0eb31ed | 1747 | } |
165923fa | 1748 | |
7b78fd02 | 1749 | /* Now handle prevailing Partition Descriptors */ |
ee4af50c JK |
1750 | for (i = 0; i < data.num_part_descs; i++) { |
1751 | ret = udf_load_partdesc(sb, data.part_descs_loc[i].rec.block); | |
1752 | if (ret < 0) | |
1753 | return ret; | |
1da177e4 LT |
1754 | } |
1755 | ||
1756 | return 0; | |
1757 | } | |
1758 | ||
d759bfa4 JK |
1759 | /* |
1760 | * Load Volume Descriptor Sequence described by anchor in bh | |
1761 | * | |
1762 | * Returns <0 on error, 0 on success | |
1763 | */ | |
40346005 JK |
1764 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, |
1765 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1766 | { |
40346005 | 1767 | struct anchorVolDescPtr *anchor; |
d759bfa4 JK |
1768 | sector_t main_s, main_e, reserve_s, reserve_e; |
1769 | int ret; | |
1da177e4 | 1770 | |
40346005 JK |
1771 | anchor = (struct anchorVolDescPtr *)bh->b_data; |
1772 | ||
1773 | /* Locate the main sequence */ | |
1774 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1775 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1776 | main_e = main_e >> sb->s_blocksize_bits; | |
91c9c9ec | 1777 | main_e += main_s - 1; |
40346005 JK |
1778 | |
1779 | /* Locate the reserve sequence */ | |
1780 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); | |
1781 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); | |
1782 | reserve_e = reserve_e >> sb->s_blocksize_bits; | |
91c9c9ec | 1783 | reserve_e += reserve_s - 1; |
40346005 JK |
1784 | |
1785 | /* Process the main & reserve sequences */ | |
1786 | /* responsible for finding the PartitionDesc(s) */ | |
d759bfa4 JK |
1787 | ret = udf_process_sequence(sb, main_s, main_e, fileset); |
1788 | if (ret != -EAGAIN) | |
1789 | return ret; | |
bff943af | 1790 | udf_sb_free_partitions(sb); |
d759bfa4 JK |
1791 | ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset); |
1792 | if (ret < 0) { | |
1793 | udf_sb_free_partitions(sb); | |
1794 | /* No sequence was OK, return -EIO */ | |
1795 | if (ret == -EAGAIN) | |
1796 | ret = -EIO; | |
1797 | } | |
1798 | return ret; | |
1da177e4 LT |
1799 | } |
1800 | ||
40346005 JK |
1801 | /* |
1802 | * Check whether there is an anchor block in the given block and | |
1803 | * load Volume Descriptor Sequence if so. | |
d759bfa4 JK |
1804 | * |
1805 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor | |
1806 | * block | |
40346005 JK |
1807 | */ |
1808 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, | |
1809 | struct kernel_lb_addr *fileset) | |
1197e4df | 1810 | { |
40346005 JK |
1811 | struct buffer_head *bh; |
1812 | uint16_t ident; | |
1813 | int ret; | |
1197e4df | 1814 | |
40346005 JK |
1815 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
1816 | udf_fixed_to_variable(block) >= | |
23bcda11 | 1817 | i_size_read(sb->s_bdev->bd_inode) >> sb->s_blocksize_bits) |
d759bfa4 | 1818 | return -EAGAIN; |
40346005 JK |
1819 | |
1820 | bh = udf_read_tagged(sb, block, block, &ident); | |
1821 | if (!bh) | |
d759bfa4 | 1822 | return -EAGAIN; |
40346005 JK |
1823 | if (ident != TAG_IDENT_AVDP) { |
1824 | brelse(bh); | |
d759bfa4 | 1825 | return -EAGAIN; |
1197e4df | 1826 | } |
40346005 JK |
1827 | ret = udf_load_sequence(sb, bh, fileset); |
1828 | brelse(bh); | |
1829 | return ret; | |
1197e4df CL |
1830 | } |
1831 | ||
d759bfa4 JK |
1832 | /* |
1833 | * Search for an anchor volume descriptor pointer. | |
1834 | * | |
1835 | * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set | |
1836 | * of anchors. | |
1837 | */ | |
1838 | static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock, | |
1839 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1840 | { |
40346005 | 1841 | sector_t last[6]; |
38b74a53 | 1842 | int i; |
40346005 JK |
1843 | struct udf_sb_info *sbi = UDF_SB(sb); |
1844 | int last_count = 0; | |
d759bfa4 | 1845 | int ret; |
1da177e4 | 1846 | |
40346005 JK |
1847 | /* First try user provided anchor */ |
1848 | if (sbi->s_anchor) { | |
d759bfa4 JK |
1849 | ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset); |
1850 | if (ret != -EAGAIN) | |
1851 | return ret; | |
40346005 JK |
1852 | } |
1853 | /* | |
1854 | * according to spec, anchor is in either: | |
1855 | * block 256 | |
1856 | * lastblock-256 | |
1857 | * lastblock | |
1858 | * however, if the disc isn't closed, it could be 512. | |
1859 | */ | |
d759bfa4 JK |
1860 | ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset); |
1861 | if (ret != -EAGAIN) | |
1862 | return ret; | |
40346005 JK |
1863 | /* |
1864 | * The trouble is which block is the last one. Drives often misreport | |
1865 | * this so we try various possibilities. | |
1866 | */ | |
d759bfa4 JK |
1867 | last[last_count++] = *lastblock; |
1868 | if (*lastblock >= 1) | |
1869 | last[last_count++] = *lastblock - 1; | |
1870 | last[last_count++] = *lastblock + 1; | |
1871 | if (*lastblock >= 2) | |
1872 | last[last_count++] = *lastblock - 2; | |
1873 | if (*lastblock >= 150) | |
1874 | last[last_count++] = *lastblock - 150; | |
1875 | if (*lastblock >= 152) | |
1876 | last[last_count++] = *lastblock - 152; | |
1da177e4 | 1877 | |
40346005 | 1878 | for (i = 0; i < last_count; i++) { |
23bcda11 | 1879 | if (last[i] >= i_size_read(sb->s_bdev->bd_inode) >> |
40346005 | 1880 | sb->s_blocksize_bits) |
28f7c4d4 | 1881 | continue; |
d759bfa4 JK |
1882 | ret = udf_check_anchor_block(sb, last[i], fileset); |
1883 | if (ret != -EAGAIN) { | |
1884 | if (!ret) | |
1885 | *lastblock = last[i]; | |
1886 | return ret; | |
1887 | } | |
40346005 | 1888 | if (last[i] < 256) |
28f7c4d4 | 1889 | continue; |
d759bfa4 JK |
1890 | ret = udf_check_anchor_block(sb, last[i] - 256, fileset); |
1891 | if (ret != -EAGAIN) { | |
1892 | if (!ret) | |
1893 | *lastblock = last[i]; | |
1894 | return ret; | |
1895 | } | |
40346005 | 1896 | } |
28f7c4d4 | 1897 | |
40346005 | 1898 | /* Finally try block 512 in case media is open */ |
d759bfa4 | 1899 | return udf_check_anchor_block(sb, sbi->s_session + 512, fileset); |
40346005 | 1900 | } |
28f7c4d4 | 1901 | |
40346005 JK |
1902 | /* |
1903 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from | |
1904 | * area specified by it. The function expects sbi->s_lastblock to be the last | |
1905 | * block on the media. | |
1906 | * | |
d759bfa4 JK |
1907 | * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor |
1908 | * was not found. | |
40346005 JK |
1909 | */ |
1910 | static int udf_find_anchor(struct super_block *sb, | |
1911 | struct kernel_lb_addr *fileset) | |
1912 | { | |
40346005 | 1913 | struct udf_sb_info *sbi = UDF_SB(sb); |
d759bfa4 JK |
1914 | sector_t lastblock = sbi->s_last_block; |
1915 | int ret; | |
28f7c4d4 | 1916 | |
d759bfa4 JK |
1917 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1918 | if (ret != -EAGAIN) | |
40346005 | 1919 | goto out; |
1da177e4 | 1920 | |
40346005 JK |
1921 | /* No anchor found? Try VARCONV conversion of block numbers */ |
1922 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
d759bfa4 | 1923 | lastblock = udf_variable_to_fixed(sbi->s_last_block); |
40346005 | 1924 | /* Firstly, we try to not convert number of the last block */ |
d759bfa4 JK |
1925 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1926 | if (ret != -EAGAIN) | |
40346005 | 1927 | goto out; |
1da177e4 | 1928 | |
d759bfa4 | 1929 | lastblock = sbi->s_last_block; |
40346005 | 1930 | /* Secondly, we try with converted number of the last block */ |
d759bfa4 JK |
1931 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1932 | if (ret < 0) { | |
40346005 JK |
1933 | /* VARCONV didn't help. Clear it. */ |
1934 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); | |
1da177e4 | 1935 | } |
40346005 | 1936 | out: |
d759bfa4 JK |
1937 | if (ret == 0) |
1938 | sbi->s_last_block = lastblock; | |
1939 | return ret; | |
40346005 | 1940 | } |
1da177e4 | 1941 | |
40346005 JK |
1942 | /* |
1943 | * Check Volume Structure Descriptor, find Anchor block and load Volume | |
d759bfa4 JK |
1944 | * Descriptor Sequence. |
1945 | * | |
1946 | * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor | |
1947 | * block was not found. | |
40346005 JK |
1948 | */ |
1949 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, | |
1950 | int silent, struct kernel_lb_addr *fileset) | |
1951 | { | |
1952 | struct udf_sb_info *sbi = UDF_SB(sb); | |
ba54aef0 | 1953 | int nsr = 0; |
d759bfa4 | 1954 | int ret; |
40346005 JK |
1955 | |
1956 | if (!sb_set_blocksize(sb, uopt->blocksize)) { | |
1957 | if (!silent) | |
78ace70c | 1958 | udf_warn(sb, "Bad block size\n"); |
d759bfa4 | 1959 | return -EINVAL; |
40346005 JK |
1960 | } |
1961 | sbi->s_last_block = uopt->lastblock; | |
1962 | if (!uopt->novrs) { | |
1963 | /* Check that it is NSR02 compliant */ | |
ba54aef0 SM |
1964 | nsr = udf_check_vsd(sb); |
1965 | if (!nsr) { | |
40346005 | 1966 | if (!silent) |
78ace70c | 1967 | udf_warn(sb, "No VRS found\n"); |
70f16cef | 1968 | return -EINVAL; |
40346005 | 1969 | } |
ba54aef0 | 1970 | if (nsr == -1) |
44499602 PF |
1971 | udf_debug("Failed to read sector at offset %d. " |
1972 | "Assuming open disc. Skipping validity " | |
1973 | "check\n", VSD_FIRST_SECTOR_OFFSET); | |
40346005 JK |
1974 | if (!sbi->s_last_block) |
1975 | sbi->s_last_block = udf_get_last_block(sb); | |
1976 | } else { | |
1977 | udf_debug("Validity check skipped because of novrs option\n"); | |
28f7c4d4 | 1978 | } |
1da177e4 | 1979 | |
40346005 JK |
1980 | /* Look for anchor block and load Volume Descriptor Sequence */ |
1981 | sbi->s_anchor = uopt->anchor; | |
d759bfa4 JK |
1982 | ret = udf_find_anchor(sb, fileset); |
1983 | if (ret < 0) { | |
1984 | if (!silent && ret == -EAGAIN) | |
78ace70c | 1985 | udf_warn(sb, "No anchor found\n"); |
d759bfa4 | 1986 | return ret; |
40346005 | 1987 | } |
d759bfa4 | 1988 | return 0; |
1da177e4 LT |
1989 | } |
1990 | ||
ebbd5e99 SM |
1991 | static void udf_finalize_lvid(struct logicalVolIntegrityDesc *lvid) |
1992 | { | |
1993 | struct timespec64 ts; | |
1994 | ||
1995 | ktime_get_real_ts64(&ts); | |
1996 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts); | |
1997 | lvid->descTag.descCRC = cpu_to_le16( | |
1998 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), | |
1999 | le16_to_cpu(lvid->descTag.descCRCLength))); | |
2000 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
2001 | } | |
2002 | ||
1da177e4 LT |
2003 | static void udf_open_lvid(struct super_block *sb) |
2004 | { | |
6c79e987 MS |
2005 | struct udf_sb_info *sbi = UDF_SB(sb); |
2006 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
2007 | struct logicalVolIntegrityDesc *lvid; |
2008 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
146bca72 | 2009 | |
165923fa MS |
2010 | if (!bh) |
2011 | return; | |
165923fa | 2012 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
69d75671 JK |
2013 | lvidiu = udf_sb_lvidiu(sb); |
2014 | if (!lvidiu) | |
2015 | return; | |
165923fa | 2016 | |
69d75671 | 2017 | mutex_lock(&sbi->s_alloc_mutex); |
165923fa MS |
2018 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
2019 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
b72e632c JK |
2020 | if (le32_to_cpu(lvid->integrityType) == LVID_INTEGRITY_TYPE_CLOSE) |
2021 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); | |
2022 | else | |
2023 | UDF_SET_FLAG(sb, UDF_FLAG_INCONSISTENT); | |
165923fa | 2024 | |
ebbd5e99 | 2025 | udf_finalize_lvid(lvid); |
165923fa | 2026 | mark_buffer_dirty(bh); |
146bca72 | 2027 | sbi->s_lvid_dirty = 0; |
949f4a7c | 2028 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
2029 | /* Make opening of filesystem visible on the media immediately */ |
2030 | sync_dirty_buffer(bh); | |
1da177e4 LT |
2031 | } |
2032 | ||
2033 | static void udf_close_lvid(struct super_block *sb) | |
2034 | { | |
6c79e987 MS |
2035 | struct udf_sb_info *sbi = UDF_SB(sb); |
2036 | struct buffer_head *bh = sbi->s_lvid_bh; | |
2037 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 2038 | struct logicalVolIntegrityDescImpUse *lvidiu; |
28de7948 | 2039 | |
6c79e987 MS |
2040 | if (!bh) |
2041 | return; | |
69d75671 JK |
2042 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
2043 | lvidiu = udf_sb_lvidiu(sb); | |
2044 | if (!lvidiu) | |
2045 | return; | |
6c79e987 | 2046 | |
949f4a7c | 2047 | mutex_lock(&sbi->s_alloc_mutex); |
165923fa MS |
2048 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
2049 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
165923fa MS |
2050 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) |
2051 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
2052 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
2053 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
2054 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
2055 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
b72e632c JK |
2056 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_INCONSISTENT)) |
2057 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
165923fa | 2058 | |
853a0c25 JK |
2059 | /* |
2060 | * We set buffer uptodate unconditionally here to avoid spurious | |
2061 | * warnings from mark_buffer_dirty() when previous EIO has marked | |
2062 | * the buffer as !uptodate | |
2063 | */ | |
2064 | set_buffer_uptodate(bh); | |
ebbd5e99 | 2065 | udf_finalize_lvid(lvid); |
165923fa | 2066 | mark_buffer_dirty(bh); |
146bca72 | 2067 | sbi->s_lvid_dirty = 0; |
949f4a7c | 2068 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
2069 | /* Make closing of filesystem visible on the media immediately */ |
2070 | sync_dirty_buffer(bh); | |
1da177e4 LT |
2071 | } |
2072 | ||
d664b6af JK |
2073 | u64 lvid_get_unique_id(struct super_block *sb) |
2074 | { | |
2075 | struct buffer_head *bh; | |
2076 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2077 | struct logicalVolIntegrityDesc *lvid; | |
2078 | struct logicalVolHeaderDesc *lvhd; | |
2079 | u64 uniqueID; | |
2080 | u64 ret; | |
2081 | ||
2082 | bh = sbi->s_lvid_bh; | |
2083 | if (!bh) | |
2084 | return 0; | |
2085 | ||
2086 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
2087 | lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; | |
2088 | ||
2089 | mutex_lock(&sbi->s_alloc_mutex); | |
2090 | ret = uniqueID = le64_to_cpu(lvhd->uniqueID); | |
2091 | if (!(++uniqueID & 0xFFFFFFFF)) | |
2092 | uniqueID += 16; | |
2093 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
e8b42747 | 2094 | udf_updated_lvid(sb); |
d664b6af | 2095 | mutex_unlock(&sbi->s_alloc_mutex); |
d664b6af JK |
2096 | |
2097 | return ret; | |
1da177e4 LT |
2098 | } |
2099 | ||
1da177e4 LT |
2100 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
2101 | { | |
d759bfa4 | 2102 | int ret = -EINVAL; |
cb00ea35 | 2103 | struct inode *inode = NULL; |
1da177e4 | 2104 | struct udf_options uopt; |
5ca4e4be | 2105 | struct kernel_lb_addr rootdir, fileset; |
1da177e4 | 2106 | struct udf_sb_info *sbi; |
9181f8bf | 2107 | bool lvid_open = false; |
1da177e4 LT |
2108 | |
2109 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
116e5258 JK |
2110 | /* By default we'll use overflow[ug]id when UDF inode [ug]id == -1 */ |
2111 | uopt.uid = make_kuid(current_user_ns(), overflowuid); | |
2112 | uopt.gid = make_kgid(current_user_ns(), overflowgid); | |
1da177e4 | 2113 | uopt.umask = 0; |
87bc730c MS |
2114 | uopt.fmode = UDF_INVALID_MODE; |
2115 | uopt.dmode = UDF_INVALID_MODE; | |
785dffe1 | 2116 | uopt.nls_map = NULL; |
1da177e4 | 2117 | |
033c9da0 | 2118 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
9db9f9e3 | 2119 | if (!sbi) |
1da177e4 | 2120 | return -ENOMEM; |
28de7948 | 2121 | |
1da177e4 | 2122 | sb->s_fs_info = sbi; |
1da177e4 | 2123 | |
1e7933de | 2124 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 2125 | |
6da80894 | 2126 | if (!udf_parse_options((char *)options, &uopt, false)) |
fdf2657b | 2127 | goto parse_options_failure; |
1da177e4 LT |
2128 | |
2129 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 2130 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
8076c363 | 2131 | udf_err(sb, "utf8 cannot be combined with iocharset\n"); |
fdf2657b | 2132 | goto parse_options_failure; |
1da177e4 | 2133 | } |
cb00ea35 | 2134 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
2135 | uopt.nls_map = load_nls_default(); |
2136 | if (!uopt.nls_map) | |
2137 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
2138 | else | |
2139 | udf_debug("Using default NLS map\n"); | |
2140 | } | |
1da177e4 LT |
2141 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) |
2142 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
2143 | ||
2144 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
2145 | fileset.partitionReferenceNum = 0xFFFF; | |
2146 | ||
6c79e987 MS |
2147 | sbi->s_flags = uopt.flags; |
2148 | sbi->s_uid = uopt.uid; | |
2149 | sbi->s_gid = uopt.gid; | |
2150 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
2151 | sbi->s_fmode = uopt.fmode; |
2152 | sbi->s_dmode = uopt.dmode; | |
6c79e987 | 2153 | sbi->s_nls_map = uopt.nls_map; |
c03cad24 | 2154 | rwlock_init(&sbi->s_cred_lock); |
1da177e4 | 2155 | |
cb00ea35 | 2156 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 2157 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 2158 | else |
6c79e987 | 2159 | sbi->s_session = uopt.session; |
1da177e4 | 2160 | |
6c79e987 | 2161 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 2162 | |
40346005 JK |
2163 | /* Fill in the rest of the superblock */ |
2164 | sb->s_op = &udf_sb_ops; | |
2165 | sb->s_export_op = &udf_export_ops; | |
123e9caf | 2166 | |
40346005 JK |
2167 | sb->s_magic = UDF_SUPER_MAGIC; |
2168 | sb->s_time_gran = 1000; | |
2169 | ||
1197e4df | 2170 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { |
40346005 | 2171 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 2172 | } else { |
e1defc4f | 2173 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); |
70f16cef | 2174 | while (uopt.blocksize <= 4096) { |
40346005 | 2175 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
70f16cef FF |
2176 | if (ret < 0) { |
2177 | if (!silent && ret != -EACCES) { | |
fcbf7637 | 2178 | pr_notice("Scanning with blocksize %u failed\n", |
70f16cef FF |
2179 | uopt.blocksize); |
2180 | } | |
2181 | brelse(sbi->s_lvid_bh); | |
2182 | sbi->s_lvid_bh = NULL; | |
2183 | /* | |
2184 | * EACCES is special - we want to propagate to | |
2185 | * upper layers that we cannot handle RW mount. | |
2186 | */ | |
2187 | if (ret == -EACCES) | |
2188 | break; | |
2189 | } else | |
2190 | break; | |
2191 | ||
2192 | uopt.blocksize <<= 1; | |
1197e4df | 2193 | } |
1da177e4 | 2194 | } |
d759bfa4 JK |
2195 | if (ret < 0) { |
2196 | if (ret == -EAGAIN) { | |
2197 | udf_warn(sb, "No partition found (1)\n"); | |
2198 | ret = -EINVAL; | |
2199 | } | |
1da177e4 LT |
2200 | goto error_out; |
2201 | } | |
2202 | ||
fcbf7637 | 2203 | udf_debug("Lastblock=%u\n", sbi->s_last_block); |
1da177e4 | 2204 | |
6c79e987 | 2205 | if (sbi->s_lvid_bh) { |
4b11111a | 2206 | struct logicalVolIntegrityDescImpUse *lvidiu = |
69d75671 JK |
2207 | udf_sb_lvidiu(sb); |
2208 | uint16_t minUDFReadRev; | |
2209 | uint16_t minUDFWriteRev; | |
1da177e4 | 2210 | |
69d75671 JK |
2211 | if (!lvidiu) { |
2212 | ret = -EINVAL; | |
2213 | goto error_out; | |
2214 | } | |
2215 | minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); | |
2216 | minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
cb00ea35 | 2217 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
78ace70c | 2218 | udf_err(sb, "minUDFReadRev=%x (max is %x)\n", |
69d75671 | 2219 | minUDFReadRev, |
78ace70c | 2220 | UDF_MAX_READ_VERSION); |
d759bfa4 | 2221 | ret = -EINVAL; |
1da177e4 | 2222 | goto error_out; |
a9ad01bc JK |
2223 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) { |
2224 | if (!sb_rdonly(sb)) { | |
2225 | ret = -EACCES; | |
2226 | goto error_out; | |
2227 | } | |
2228 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); | |
e729eac6 | 2229 | } |
1da177e4 | 2230 | |
6c79e987 | 2231 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
2232 | |
2233 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
2234 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
2235 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
2236 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
2237 | } | |
2238 | ||
6c79e987 | 2239 | if (!sbi->s_partitions) { |
78ace70c | 2240 | udf_warn(sb, "No partition found (2)\n"); |
d759bfa4 | 2241 | ret = -EINVAL; |
1da177e4 LT |
2242 | goto error_out; |
2243 | } | |
2244 | ||
4b11111a | 2245 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
a9ad01bc JK |
2246 | UDF_PART_FLAG_READ_ONLY) { |
2247 | if (!sb_rdonly(sb)) { | |
2248 | ret = -EACCES; | |
2249 | goto error_out; | |
2250 | } | |
2251 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); | |
c1a26e7d | 2252 | } |
39b3f6d6 | 2253 | |
2dee5aac JK |
2254 | ret = udf_find_fileset(sb, &fileset, &rootdir); |
2255 | if (ret < 0) { | |
78ace70c | 2256 | udf_warn(sb, "No fileset found\n"); |
1da177e4 LT |
2257 | goto error_out; |
2258 | } | |
2259 | ||
cb00ea35 | 2260 | if (!silent) { |
5ca4e4be | 2261 | struct timestamp ts; |
56774805 | 2262 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); |
78ace70c JP |
2263 | udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
2264 | sbi->s_volume_ident, | |
2265 | le16_to_cpu(ts.year), ts.month, ts.day, | |
56774805 | 2266 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); |
1da177e4 | 2267 | } |
bc98a42c | 2268 | if (!sb_rdonly(sb)) { |
1da177e4 | 2269 | udf_open_lvid(sb); |
9181f8bf JK |
2270 | lvid_open = true; |
2271 | } | |
1da177e4 LT |
2272 | |
2273 | /* Assign the root inode */ | |
2274 | /* assign inodes by physical block number */ | |
2275 | /* perhaps it's not extensible enough, but for now ... */ | |
97e961fd | 2276 | inode = udf_iget(sb, &rootdir); |
6d3d5e86 | 2277 | if (IS_ERR(inode)) { |
fcbf7637 | 2278 | udf_err(sb, "Error in udf_iget, block=%u, partition=%u\n", |
cb00ea35 | 2279 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
6d3d5e86 | 2280 | ret = PTR_ERR(inode); |
1da177e4 LT |
2281 | goto error_out; |
2282 | } | |
2283 | ||
2284 | /* Allocate a dentry for the root inode */ | |
48fde701 | 2285 | sb->s_root = d_make_root(inode); |
cb00ea35 | 2286 | if (!sb->s_root) { |
78ace70c | 2287 | udf_err(sb, "Couldn't allocate root dentry\n"); |
d759bfa4 | 2288 | ret = -ENOMEM; |
1da177e4 LT |
2289 | goto error_out; |
2290 | } | |
31170b6a | 2291 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
8de52778 | 2292 | sb->s_max_links = UDF_MAX_LINKS; |
1da177e4 LT |
2293 | return 0; |
2294 | ||
28de7948 | 2295 | error_out: |
0d454e4a | 2296 | iput(sbi->s_vat_inode); |
fdf2657b | 2297 | parse_options_failure: |
785dffe1 CX |
2298 | if (uopt.nls_map) |
2299 | unload_nls(uopt.nls_map); | |
9181f8bf | 2300 | if (lvid_open) |
1da177e4 | 2301 | udf_close_lvid(sb); |
6c79e987 | 2302 | brelse(sbi->s_lvid_bh); |
bff943af | 2303 | udf_sb_free_partitions(sb); |
1da177e4 LT |
2304 | kfree(sbi); |
2305 | sb->s_fs_info = NULL; | |
28de7948 | 2306 | |
d759bfa4 | 2307 | return ret; |
1da177e4 LT |
2308 | } |
2309 | ||
8076c363 JP |
2310 | void _udf_err(struct super_block *sb, const char *function, |
2311 | const char *fmt, ...) | |
1da177e4 | 2312 | { |
c2bff36c | 2313 | struct va_format vaf; |
1da177e4 LT |
2314 | va_list args; |
2315 | ||
1da177e4 | 2316 | va_start(args, fmt); |
c2bff36c JP |
2317 | |
2318 | vaf.fmt = fmt; | |
2319 | vaf.va = &args; | |
2320 | ||
2321 | pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2322 | ||
1da177e4 | 2323 | va_end(args); |
1da177e4 LT |
2324 | } |
2325 | ||
a40ecd7b JP |
2326 | void _udf_warn(struct super_block *sb, const char *function, |
2327 | const char *fmt, ...) | |
1da177e4 | 2328 | { |
c2bff36c | 2329 | struct va_format vaf; |
1da177e4 LT |
2330 | va_list args; |
2331 | ||
cb00ea35 | 2332 | va_start(args, fmt); |
c2bff36c JP |
2333 | |
2334 | vaf.fmt = fmt; | |
2335 | vaf.va = &args; | |
2336 | ||
2337 | pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2338 | ||
1da177e4 | 2339 | va_end(args); |
1da177e4 LT |
2340 | } |
2341 | ||
cb00ea35 | 2342 | static void udf_put_super(struct super_block *sb) |
1da177e4 | 2343 | { |
6c79e987 | 2344 | struct udf_sb_info *sbi; |
1da177e4 | 2345 | |
6c79e987 | 2346 | sbi = UDF_SB(sb); |
6cfd0148 | 2347 | |
0d454e4a | 2348 | iput(sbi->s_vat_inode); |
1da177e4 | 2349 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) |
6c79e987 | 2350 | unload_nls(sbi->s_nls_map); |
bc98a42c | 2351 | if (!sb_rdonly(sb)) |
1da177e4 | 2352 | udf_close_lvid(sb); |
6c79e987 | 2353 | brelse(sbi->s_lvid_bh); |
bff943af | 2354 | udf_sb_free_partitions(sb); |
bbe48dd8 | 2355 | mutex_destroy(&sbi->s_alloc_mutex); |
1da177e4 LT |
2356 | kfree(sb->s_fs_info); |
2357 | sb->s_fs_info = NULL; | |
2358 | } | |
2359 | ||
146bca72 JK |
2360 | static int udf_sync_fs(struct super_block *sb, int wait) |
2361 | { | |
2362 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2363 | ||
2364 | mutex_lock(&sbi->s_alloc_mutex); | |
2365 | if (sbi->s_lvid_dirty) { | |
e8b42747 | 2366 | struct buffer_head *bh = sbi->s_lvid_bh; |
52b9666e | 2367 | struct logicalVolIntegrityDesc *lvid; |
e8b42747 | 2368 | |
52b9666e JK |
2369 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
2370 | udf_finalize_lvid(lvid); | |
e8b42747 | 2371 | |
146bca72 JK |
2372 | /* |
2373 | * Blockdevice will be synced later so we don't have to submit | |
2374 | * the buffer for IO | |
2375 | */ | |
e8b42747 | 2376 | mark_buffer_dirty(bh); |
146bca72 JK |
2377 | sbi->s_lvid_dirty = 0; |
2378 | } | |
2379 | mutex_unlock(&sbi->s_alloc_mutex); | |
2380 | ||
2381 | return 0; | |
2382 | } | |
2383 | ||
cb00ea35 | 2384 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2385 | { |
726c3342 | 2386 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
2387 | struct udf_sb_info *sbi = UDF_SB(sb); |
2388 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
557f5a14 | 2389 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
6c79e987 | 2390 | |
69d75671 | 2391 | lvidiu = udf_sb_lvidiu(sb); |
1da177e4 LT |
2392 | buf->f_type = UDF_SUPER_MAGIC; |
2393 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 2394 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
2395 | buf->f_bfree = udf_count_free(sb); |
2396 | buf->f_bavail = buf->f_bfree; | |
356557be JK |
2397 | /* |
2398 | * Let's pretend each free block is also a free 'inode' since UDF does | |
2399 | * not have separate preallocated table of inodes. | |
2400 | */ | |
6c79e987 MS |
2401 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
2402 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
2403 | + buf->f_bfree; | |
1da177e4 | 2404 | buf->f_ffree = buf->f_bfree; |
9fba7056 | 2405 | buf->f_namelen = UDF_NAME_LEN; |
557f5a14 CL |
2406 | buf->f_fsid.val[0] = (u32)id; |
2407 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
2408 | |
2409 | return 0; | |
2410 | } | |
2411 | ||
4b11111a MS |
2412 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
2413 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
2414 | { |
2415 | struct buffer_head *bh = NULL; | |
2416 | unsigned int accum = 0; | |
2417 | int index; | |
b490bdd6 | 2418 | udf_pblk_t block = 0, newblock; |
5ca4e4be | 2419 | struct kernel_lb_addr loc; |
1da177e4 | 2420 | uint32_t bytes; |
1da177e4 LT |
2421 | uint8_t *ptr; |
2422 | uint16_t ident; | |
2423 | struct spaceBitmapDesc *bm; | |
2424 | ||
1da177e4 | 2425 | loc.logicalBlockNum = bitmap->s_extPosition; |
6c79e987 | 2426 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
97e961fd | 2427 | bh = udf_read_ptagged(sb, &loc, 0, &ident); |
1da177e4 | 2428 | |
cb00ea35 | 2429 | if (!bh) { |
78ace70c | 2430 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 | 2431 | goto out; |
cb00ea35 | 2432 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 2433 | brelse(bh); |
78ace70c | 2434 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 LT |
2435 | goto out; |
2436 | } | |
2437 | ||
2438 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2439 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
2440 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
2441 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 2442 | |
cb00ea35 | 2443 | while (bytes > 0) { |
01b954a3 MS |
2444 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
2445 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2446 | cur_bytes * 8); | |
2447 | bytes -= cur_bytes; | |
cb00ea35 | 2448 | if (bytes) { |
3bf25cb4 | 2449 | brelse(bh); |
97e961fd | 2450 | newblock = udf_get_lb_pblock(sb, &loc, ++block); |
1da177e4 | 2451 | bh = udf_tread(sb, newblock); |
cb00ea35 | 2452 | if (!bh) { |
1da177e4 LT |
2453 | udf_debug("read failed\n"); |
2454 | goto out; | |
2455 | } | |
2456 | index = 0; | |
28de7948 | 2457 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2458 | } |
2459 | } | |
3bf25cb4 | 2460 | brelse(bh); |
28de7948 | 2461 | out: |
1da177e4 LT |
2462 | return accum; |
2463 | } | |
2464 | ||
4b11111a MS |
2465 | static unsigned int udf_count_free_table(struct super_block *sb, |
2466 | struct inode *table) | |
1da177e4 LT |
2467 | { |
2468 | unsigned int accum = 0; | |
ff116fc8 | 2469 | uint32_t elen; |
5ca4e4be | 2470 | struct kernel_lb_addr eloc; |
1da177e4 | 2471 | int8_t etype; |
ff116fc8 | 2472 | struct extent_position epos; |
1da177e4 | 2473 | |
d1668fe3 | 2474 | mutex_lock(&UDF_SB(sb)->s_alloc_mutex); |
c0b34438 | 2475 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2476 | epos.offset = sizeof(struct unallocSpaceEntry); |
2477 | epos.bh = NULL; | |
1da177e4 | 2478 | |
3a71fc5d | 2479 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2480 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2481 | |
3bf25cb4 | 2482 | brelse(epos.bh); |
d1668fe3 | 2483 | mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); |
1da177e4 LT |
2484 | |
2485 | return accum; | |
2486 | } | |
cb00ea35 CG |
2487 | |
2488 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2489 | { |
2490 | unsigned int accum = 0; | |
a4a8b99e | 2491 | struct udf_sb_info *sbi = UDF_SB(sb); |
6c79e987 | 2492 | struct udf_part_map *map; |
a4a8b99e JK |
2493 | unsigned int part = sbi->s_partition; |
2494 | int ptype = sbi->s_partmaps[part].s_partition_type; | |
2495 | ||
2496 | if (ptype == UDF_METADATA_MAP25) { | |
2497 | part = sbi->s_partmaps[part].s_type_specific.s_metadata. | |
2498 | s_phys_partition_ref; | |
2499 | } else if (ptype == UDF_VIRTUAL_MAP15 || ptype == UDF_VIRTUAL_MAP20) { | |
2500 | /* | |
2501 | * Filesystems with VAT are append-only and we cannot write to | |
2502 | * them. Let's just report 0 here. | |
2503 | */ | |
2504 | return 0; | |
2505 | } | |
1da177e4 | 2506 | |
6c79e987 | 2507 | if (sbi->s_lvid_bh) { |
4b11111a MS |
2508 | struct logicalVolIntegrityDesc *lvid = |
2509 | (struct logicalVolIntegrityDesc *) | |
2510 | sbi->s_lvid_bh->b_data; | |
a4a8b99e | 2511 | if (le32_to_cpu(lvid->numOfPartitions) > part) { |
4b11111a | 2512 | accum = le32_to_cpu( |
a4a8b99e | 2513 | lvid->freeSpaceTable[part]); |
1da177e4 LT |
2514 | if (accum == 0xFFFFFFFF) |
2515 | accum = 0; | |
2516 | } | |
2517 | } | |
2518 | ||
2519 | if (accum) | |
2520 | return accum; | |
2521 | ||
a4a8b99e | 2522 | map = &sbi->s_partmaps[part]; |
6c79e987 | 2523 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { |
28de7948 | 2524 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2525 | map->s_uspace.s_bitmap); |
1da177e4 | 2526 | } |
1da177e4 LT |
2527 | if (accum) |
2528 | return accum; | |
2529 | ||
6c79e987 | 2530 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2531 | accum += udf_count_free_table(sb, |
6c79e987 | 2532 | map->s_uspace.s_table); |
1da177e4 | 2533 | } |
1da177e4 LT |
2534 | return accum; |
2535 | } | |
54bb60d5 FF |
2536 | |
2537 | MODULE_AUTHOR("Ben Fennema"); | |
2538 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); | |
2539 | MODULE_LICENSE("GPL"); | |
2540 | module_init(init_udf_fs) | |
2541 | module_exit(exit_udf_fs) |