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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * super.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Super block routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
7 | * DESCRIPTION | |
8 | * OSTA-UDF(tm) = Optical Storage Technology Association | |
9 | * Universal Disk Format. | |
10 | * | |
11 | * This code is based on version 2.00 of the UDF specification, | |
12 | * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346]. | |
13 | * http://www.osta.org/ | |
14 | * http://www.ecma.ch/ | |
15 | * http://www.iso.org/ | |
16 | * | |
1da177e4 LT |
17 | * COPYRIGHT |
18 | * This file is distributed under the terms of the GNU General Public | |
19 | * License (GPL). Copies of the GPL can be obtained from: | |
20 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
21 | * Each contributing author retains all rights to their own work. | |
22 | * | |
23 | * (C) 1998 Dave Boynton | |
24 | * (C) 1998-2004 Ben Fennema | |
25 | * (C) 2000 Stelias Computing Inc | |
26 | * | |
27 | * HISTORY | |
28 | * | |
29 | * 09/24/98 dgb changed to allow compiling outside of kernel, and | |
30 | * added some debugging. | |
31 | * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34 | |
32 | * 10/16/98 attempting some multi-session support | |
33 | * 10/17/98 added freespace count for "df" | |
34 | * 11/11/98 gr added novrs option | |
35 | * 11/26/98 dgb added fileset,anchor mount options | |
3a71fc5d MS |
36 | * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced |
37 | * vol descs. rewrote option handling based on isofs | |
1da177e4 LT |
38 | * 12/20/98 find the free space bitmap (if it exists) |
39 | */ | |
40 | ||
cb00ea35 | 41 | #include "udfdecl.h" |
1da177e4 | 42 | |
1da177e4 LT |
43 | #include <linux/blkdev.h> |
44 | #include <linux/slab.h> | |
45 | #include <linux/kernel.h> | |
46 | #include <linux/module.h> | |
47 | #include <linux/parser.h> | |
48 | #include <linux/stat.h> | |
49 | #include <linux/cdrom.h> | |
50 | #include <linux/nls.h> | |
1da177e4 LT |
51 | #include <linux/vfs.h> |
52 | #include <linux/vmalloc.h> | |
dc5d39be | 53 | #include <linux/errno.h> |
6da80894 MS |
54 | #include <linux/mount.h> |
55 | #include <linux/seq_file.h> | |
01b954a3 | 56 | #include <linux/bitmap.h> |
f845fced | 57 | #include <linux/crc-itu-t.h> |
1df2ae31 | 58 | #include <linux/log2.h> |
1da177e4 LT |
59 | #include <asm/byteorder.h> |
60 | ||
1da177e4 LT |
61 | #include "udf_sb.h" |
62 | #include "udf_i.h" | |
63 | ||
64 | #include <linux/init.h> | |
e973606c | 65 | #include <linux/uaccess.h> |
1da177e4 | 66 | |
4b8d4252 JK |
67 | enum { |
68 | VDS_POS_PRIMARY_VOL_DESC, | |
69 | VDS_POS_UNALLOC_SPACE_DESC, | |
70 | VDS_POS_LOGICAL_VOL_DESC, | |
4b8d4252 | 71 | VDS_POS_IMP_USE_VOL_DESC, |
4b8d4252 JK |
72 | VDS_POS_LENGTH |
73 | }; | |
1da177e4 | 74 | |
44499602 PF |
75 | #define VSD_FIRST_SECTOR_OFFSET 32768 |
76 | #define VSD_MAX_SECTOR_OFFSET 0x800000 | |
77 | ||
a47241cd AT |
78 | /* |
79 | * Maximum number of Terminating Descriptor / Logical Volume Integrity | |
80 | * Descriptor redirections. The chosen numbers are arbitrary - just that we | |
81 | * hopefully don't limit any real use of rewritten inode on write-once media | |
82 | * but avoid looping for too long on corrupted media. | |
83 | */ | |
84 | #define UDF_MAX_TD_NESTING 64 | |
85 | #define UDF_MAX_LVID_NESTING 1000 | |
86 | ||
8de52778 AV |
87 | enum { UDF_MAX_LINKS = 0xffff }; |
88 | ||
1da177e4 LT |
89 | /* These are the "meat" - everything else is stuffing */ |
90 | static int udf_fill_super(struct super_block *, void *, int); | |
91 | static void udf_put_super(struct super_block *); | |
146bca72 | 92 | static int udf_sync_fs(struct super_block *, int); |
1da177e4 | 93 | static int udf_remount_fs(struct super_block *, int *, char *); |
5ca4e4be | 94 | static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); |
5ca4e4be PE |
95 | static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, |
96 | struct kernel_lb_addr *); | |
2dee5aac JK |
97 | static int udf_load_fileset(struct super_block *, struct fileSetDesc *, |
98 | struct kernel_lb_addr *); | |
1da177e4 LT |
99 | static void udf_open_lvid(struct super_block *); |
100 | static void udf_close_lvid(struct super_block *); | |
101 | static unsigned int udf_count_free(struct super_block *); | |
726c3342 | 102 | static int udf_statfs(struct dentry *, struct kstatfs *); |
34c80b1d | 103 | static int udf_show_options(struct seq_file *, struct dentry *); |
1da177e4 | 104 | |
69d75671 | 105 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb) |
6c79e987 | 106 | { |
69d75671 JK |
107 | struct logicalVolIntegrityDesc *lvid; |
108 | unsigned int partnum; | |
109 | unsigned int offset; | |
110 | ||
111 | if (!UDF_SB(sb)->s_lvid_bh) | |
112 | return NULL; | |
113 | lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data; | |
114 | partnum = le32_to_cpu(lvid->numOfPartitions); | |
115 | if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) - | |
116 | offsetof(struct logicalVolIntegrityDesc, impUse)) / | |
117 | (2 * sizeof(uint32_t)) < partnum) { | |
118 | udf_err(sb, "Logical volume integrity descriptor corrupted " | |
119 | "(numOfPartitions = %u)!\n", partnum); | |
120 | return NULL; | |
121 | } | |
122 | /* The offset is to skip freeSpaceTable and sizeTable arrays */ | |
123 | offset = partnum * 2 * sizeof(uint32_t); | |
6c79e987 MS |
124 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
125 | } | |
126 | ||
1da177e4 | 127 | /* UDF filesystem type */ |
152a0836 AV |
128 | static struct dentry *udf_mount(struct file_system_type *fs_type, |
129 | int flags, const char *dev_name, void *data) | |
1da177e4 | 130 | { |
152a0836 | 131 | return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super); |
1da177e4 LT |
132 | } |
133 | ||
134 | static struct file_system_type udf_fstype = { | |
28de7948 CG |
135 | .owner = THIS_MODULE, |
136 | .name = "udf", | |
152a0836 | 137 | .mount = udf_mount, |
28de7948 CG |
138 | .kill_sb = kill_block_super, |
139 | .fs_flags = FS_REQUIRES_DEV, | |
1da177e4 | 140 | }; |
3e64fe5b | 141 | MODULE_ALIAS_FS("udf"); |
1da177e4 | 142 | |
cb00ea35 | 143 | static struct kmem_cache *udf_inode_cachep; |
1da177e4 LT |
144 | |
145 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
146 | { | |
147 | struct udf_inode_info *ei; | |
3a71fc5d | 148 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
149 | if (!ei) |
150 | return NULL; | |
95f8797f DB |
151 | |
152 | ei->i_unique = 0; | |
153 | ei->i_lenExtents = 0; | |
ab9a3a73 | 154 | ei->i_lenStreams = 0; |
95f8797f DB |
155 | ei->i_next_alloc_block = 0; |
156 | ei->i_next_alloc_goal = 0; | |
157 | ei->i_strat4096 = 0; | |
ab9a3a73 | 158 | ei->i_streamdir = 0; |
4d0fb621 | 159 | init_rwsem(&ei->i_data_sem); |
99600051 NJ |
160 | ei->cached_extent.lstart = -1; |
161 | spin_lock_init(&ei->i_extent_cache_lock); | |
95f8797f | 162 | |
1da177e4 LT |
163 | return &ei->vfs_inode; |
164 | } | |
165 | ||
a78bb383 | 166 | static void udf_free_in_core_inode(struct inode *inode) |
1da177e4 LT |
167 | { |
168 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); | |
169 | } | |
170 | ||
51cc5068 | 171 | static void init_once(void *foo) |
1da177e4 | 172 | { |
cb00ea35 | 173 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 174 | |
a35afb83 CL |
175 | ei->i_ext.i_data = NULL; |
176 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
177 | } |
178 | ||
53ea18de | 179 | static int __init init_inodecache(void) |
1da177e4 LT |
180 | { |
181 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
182 | sizeof(struct udf_inode_info), | |
cb00ea35 | 183 | 0, (SLAB_RECLAIM_ACCOUNT | |
5d097056 VD |
184 | SLAB_MEM_SPREAD | |
185 | SLAB_ACCOUNT), | |
20c2df83 | 186 | init_once); |
28de7948 | 187 | if (!udf_inode_cachep) |
1da177e4 LT |
188 | return -ENOMEM; |
189 | return 0; | |
190 | } | |
191 | ||
192 | static void destroy_inodecache(void) | |
193 | { | |
8c0a8537 KS |
194 | /* |
195 | * Make sure all delayed rcu free inodes are flushed before we | |
196 | * destroy cache. | |
197 | */ | |
198 | rcu_barrier(); | |
1a1d92c1 | 199 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
200 | } |
201 | ||
202 | /* Superblock operations */ | |
ee9b6d61 | 203 | static const struct super_operations udf_sb_ops = { |
28de7948 | 204 | .alloc_inode = udf_alloc_inode, |
a78bb383 | 205 | .free_inode = udf_free_in_core_inode, |
28de7948 | 206 | .write_inode = udf_write_inode, |
3aac2b62 | 207 | .evict_inode = udf_evict_inode, |
28de7948 | 208 | .put_super = udf_put_super, |
146bca72 | 209 | .sync_fs = udf_sync_fs, |
28de7948 CG |
210 | .statfs = udf_statfs, |
211 | .remount_fs = udf_remount_fs, | |
6da80894 | 212 | .show_options = udf_show_options, |
1da177e4 LT |
213 | }; |
214 | ||
cb00ea35 | 215 | struct udf_options { |
1da177e4 LT |
216 | unsigned char novrs; |
217 | unsigned int blocksize; | |
218 | unsigned int session; | |
219 | unsigned int lastblock; | |
220 | unsigned int anchor; | |
1da177e4 | 221 | unsigned int flags; |
faa17292 | 222 | umode_t umask; |
c2ba138a EB |
223 | kgid_t gid; |
224 | kuid_t uid; | |
faa17292 AV |
225 | umode_t fmode; |
226 | umode_t dmode; | |
1da177e4 LT |
227 | struct nls_table *nls_map; |
228 | }; | |
229 | ||
230 | static int __init init_udf_fs(void) | |
231 | { | |
232 | int err; | |
28de7948 | 233 | |
1da177e4 LT |
234 | err = init_inodecache(); |
235 | if (err) | |
236 | goto out1; | |
237 | err = register_filesystem(&udf_fstype); | |
238 | if (err) | |
239 | goto out; | |
28de7948 | 240 | |
1da177e4 | 241 | return 0; |
28de7948 CG |
242 | |
243 | out: | |
1da177e4 | 244 | destroy_inodecache(); |
28de7948 CG |
245 | |
246 | out1: | |
1da177e4 LT |
247 | return err; |
248 | } | |
249 | ||
250 | static void __exit exit_udf_fs(void) | |
251 | { | |
252 | unregister_filesystem(&udf_fstype); | |
253 | destroy_inodecache(); | |
254 | } | |
255 | ||
dc5d39be MS |
256 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
257 | { | |
258 | struct udf_sb_info *sbi = UDF_SB(sb); | |
259 | ||
033c9da0 | 260 | sbi->s_partmaps = kcalloc(count, sizeof(*sbi->s_partmaps), GFP_KERNEL); |
dc5d39be | 261 | if (!sbi->s_partmaps) { |
dc5d39be MS |
262 | sbi->s_partitions = 0; |
263 | return -ENOMEM; | |
264 | } | |
265 | ||
266 | sbi->s_partitions = count; | |
267 | return 0; | |
268 | } | |
269 | ||
bff943af JK |
270 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
271 | { | |
272 | int i; | |
273 | int nr_groups = bitmap->s_nr_groups; | |
bff943af JK |
274 | |
275 | for (i = 0; i < nr_groups; i++) | |
276 | if (bitmap->s_block_bitmap[i]) | |
277 | brelse(bitmap->s_block_bitmap[i]); | |
278 | ||
1d5cfdb0 | 279 | kvfree(bitmap); |
bff943af JK |
280 | } |
281 | ||
282 | static void udf_free_partition(struct udf_part_map *map) | |
283 | { | |
284 | int i; | |
285 | struct udf_meta_data *mdata; | |
286 | ||
287 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
288 | iput(map->s_uspace.s_table); | |
bff943af JK |
289 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) |
290 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
bff943af JK |
291 | if (map->s_partition_type == UDF_SPARABLE_MAP15) |
292 | for (i = 0; i < 4; i++) | |
293 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
294 | else if (map->s_partition_type == UDF_METADATA_MAP25) { | |
295 | mdata = &map->s_type_specific.s_metadata; | |
296 | iput(mdata->s_metadata_fe); | |
297 | mdata->s_metadata_fe = NULL; | |
298 | ||
299 | iput(mdata->s_mirror_fe); | |
300 | mdata->s_mirror_fe = NULL; | |
301 | ||
302 | iput(mdata->s_bitmap_fe); | |
303 | mdata->s_bitmap_fe = NULL; | |
304 | } | |
305 | } | |
306 | ||
307 | static void udf_sb_free_partitions(struct super_block *sb) | |
308 | { | |
309 | struct udf_sb_info *sbi = UDF_SB(sb); | |
310 | int i; | |
ba2eb866 ME |
311 | |
312 | if (!sbi->s_partmaps) | |
1b1baff6 | 313 | return; |
bff943af JK |
314 | for (i = 0; i < sbi->s_partitions; i++) |
315 | udf_free_partition(&sbi->s_partmaps[i]); | |
316 | kfree(sbi->s_partmaps); | |
317 | sbi->s_partmaps = NULL; | |
318 | } | |
319 | ||
34c80b1d | 320 | static int udf_show_options(struct seq_file *seq, struct dentry *root) |
6da80894 | 321 | { |
34c80b1d | 322 | struct super_block *sb = root->d_sb; |
6da80894 MS |
323 | struct udf_sb_info *sbi = UDF_SB(sb); |
324 | ||
325 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
326 | seq_puts(seq, ",nostrict"); | |
1197e4df | 327 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) |
6da80894 MS |
328 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); |
329 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
330 | seq_puts(seq, ",unhide"); | |
331 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
332 | seq_puts(seq, ",undelete"); | |
333 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
334 | seq_puts(seq, ",noadinicb"); | |
335 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
336 | seq_puts(seq, ",shortad"); | |
337 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
338 | seq_puts(seq, ",uid=forget"); | |
6da80894 MS |
339 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) |
340 | seq_puts(seq, ",gid=forget"); | |
6da80894 | 341 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) |
c2ba138a | 342 | seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid)); |
6da80894 | 343 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) |
c2ba138a | 344 | seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid)); |
6da80894 | 345 | if (sbi->s_umask != 0) |
faa17292 | 346 | seq_printf(seq, ",umask=%ho", sbi->s_umask); |
87bc730c | 347 | if (sbi->s_fmode != UDF_INVALID_MODE) |
faa17292 | 348 | seq_printf(seq, ",mode=%ho", sbi->s_fmode); |
87bc730c | 349 | if (sbi->s_dmode != UDF_INVALID_MODE) |
faa17292 | 350 | seq_printf(seq, ",dmode=%ho", sbi->s_dmode); |
6da80894 | 351 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) |
fcbf7637 | 352 | seq_printf(seq, ",session=%d", sbi->s_session); |
6da80894 MS |
353 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) |
354 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
40346005 JK |
355 | if (sbi->s_anchor != 0) |
356 | seq_printf(seq, ",anchor=%u", sbi->s_anchor); | |
6da80894 MS |
357 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) |
358 | seq_puts(seq, ",utf8"); | |
359 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
360 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
1da177e4 LT |
365 | /* |
366 | * udf_parse_options | |
367 | * | |
368 | * PURPOSE | |
369 | * Parse mount options. | |
370 | * | |
371 | * DESCRIPTION | |
372 | * The following mount options are supported: | |
373 | * | |
374 | * gid= Set the default group. | |
375 | * umask= Set the default umask. | |
7ac9bcd5 MS |
376 | * mode= Set the default file permissions. |
377 | * dmode= Set the default directory permissions. | |
1da177e4 LT |
378 | * uid= Set the default user. |
379 | * bs= Set the block size. | |
380 | * unhide Show otherwise hidden files. | |
381 | * undelete Show deleted files in lists. | |
382 | * adinicb Embed data in the inode (default) | |
383 | * noadinicb Don't embed data in the inode | |
384 | * shortad Use short ad's | |
385 | * longad Use long ad's (default) | |
386 | * nostrict Unset strict conformance | |
387 | * iocharset= Set the NLS character set | |
388 | * | |
389 | * The remaining are for debugging and disaster recovery: | |
390 | * | |
28de7948 | 391 | * novrs Skip volume sequence recognition |
1da177e4 LT |
392 | * |
393 | * The following expect a offset from 0. | |
394 | * | |
395 | * session= Set the CDROM session (default= last session) | |
396 | * anchor= Override standard anchor location. (default= 256) | |
397 | * volume= Override the VolumeDesc location. (unused) | |
398 | * partition= Override the PartitionDesc location. (unused) | |
399 | * lastblock= Set the last block of the filesystem/ | |
400 | * | |
401 | * The following expect a offset from the partition root. | |
402 | * | |
403 | * fileset= Override the fileset block location. (unused) | |
404 | * rootdir= Override the root directory location. (unused) | |
405 | * WARNING: overriding the rootdir to a non-directory may | |
406 | * yield highly unpredictable results. | |
407 | * | |
408 | * PRE-CONDITIONS | |
409 | * options Pointer to mount options string. | |
410 | * uopts Pointer to mount options variable. | |
411 | * | |
412 | * POST-CONDITIONS | |
413 | * <return> 1 Mount options parsed okay. | |
414 | * <return> 0 Error parsing mount options. | |
415 | * | |
416 | * HISTORY | |
417 | * July 1, 1997 - Andrew E. Mileski | |
418 | * Written, tested, and released. | |
419 | */ | |
28de7948 | 420 | |
1da177e4 LT |
421 | enum { |
422 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
423 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
424 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
425 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
426 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
7ac9bcd5 MS |
427 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, |
428 | Opt_fmode, Opt_dmode | |
1da177e4 LT |
429 | }; |
430 | ||
a447c093 | 431 | static const match_table_t tokens = { |
28de7948 CG |
432 | {Opt_novrs, "novrs"}, |
433 | {Opt_nostrict, "nostrict"}, | |
434 | {Opt_bs, "bs=%u"}, | |
435 | {Opt_unhide, "unhide"}, | |
436 | {Opt_undelete, "undelete"}, | |
437 | {Opt_noadinicb, "noadinicb"}, | |
438 | {Opt_adinicb, "adinicb"}, | |
439 | {Opt_shortad, "shortad"}, | |
440 | {Opt_longad, "longad"}, | |
441 | {Opt_uforget, "uid=forget"}, | |
442 | {Opt_uignore, "uid=ignore"}, | |
443 | {Opt_gforget, "gid=forget"}, | |
444 | {Opt_gignore, "gid=ignore"}, | |
445 | {Opt_gid, "gid=%u"}, | |
446 | {Opt_uid, "uid=%u"}, | |
447 | {Opt_umask, "umask=%o"}, | |
448 | {Opt_session, "session=%u"}, | |
449 | {Opt_lastblock, "lastblock=%u"}, | |
450 | {Opt_anchor, "anchor=%u"}, | |
451 | {Opt_volume, "volume=%u"}, | |
452 | {Opt_partition, "partition=%u"}, | |
453 | {Opt_fileset, "fileset=%u"}, | |
454 | {Opt_rootdir, "rootdir=%u"}, | |
455 | {Opt_utf8, "utf8"}, | |
456 | {Opt_iocharset, "iocharset=%s"}, | |
7ac9bcd5 MS |
457 | {Opt_fmode, "mode=%o"}, |
458 | {Opt_dmode, "dmode=%o"}, | |
28de7948 | 459 | {Opt_err, NULL} |
1da177e4 LT |
460 | }; |
461 | ||
6da80894 MS |
462 | static int udf_parse_options(char *options, struct udf_options *uopt, |
463 | bool remount) | |
1da177e4 LT |
464 | { |
465 | char *p; | |
466 | int option; | |
467 | ||
468 | uopt->novrs = 0; | |
1da177e4 LT |
469 | uopt->session = 0xFFFFFFFF; |
470 | uopt->lastblock = 0; | |
471 | uopt->anchor = 0; | |
1da177e4 LT |
472 | |
473 | if (!options) | |
474 | return 1; | |
475 | ||
cb00ea35 | 476 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
477 | substring_t args[MAX_OPT_ARGS]; |
478 | int token; | |
8c6915ae | 479 | unsigned n; |
1da177e4 LT |
480 | if (!*p) |
481 | continue; | |
482 | ||
483 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
484 | switch (token) { |
485 | case Opt_novrs: | |
486 | uopt->novrs = 1; | |
4136801a | 487 | break; |
cb00ea35 CG |
488 | case Opt_bs: |
489 | if (match_int(&args[0], &option)) | |
490 | return 0; | |
8c6915ae FF |
491 | n = option; |
492 | if (n != 512 && n != 1024 && n != 2048 && n != 4096) | |
493 | return 0; | |
494 | uopt->blocksize = n; | |
1197e4df | 495 | uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); |
cb00ea35 CG |
496 | break; |
497 | case Opt_unhide: | |
498 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
499 | break; | |
500 | case Opt_undelete: | |
501 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
502 | break; | |
503 | case Opt_noadinicb: | |
504 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
505 | break; | |
506 | case Opt_adinicb: | |
507 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
508 | break; | |
509 | case Opt_shortad: | |
510 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
511 | break; | |
512 | case Opt_longad: | |
513 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
514 | break; | |
515 | case Opt_gid: | |
516 | if (match_int(args, &option)) | |
517 | return 0; | |
c2ba138a EB |
518 | uopt->gid = make_kgid(current_user_ns(), option); |
519 | if (!gid_valid(uopt->gid)) | |
520 | return 0; | |
ca76d2d8 | 521 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
522 | break; |
523 | case Opt_uid: | |
524 | if (match_int(args, &option)) | |
525 | return 0; | |
c2ba138a EB |
526 | uopt->uid = make_kuid(current_user_ns(), option); |
527 | if (!uid_valid(uopt->uid)) | |
528 | return 0; | |
ca76d2d8 | 529 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
530 | break; |
531 | case Opt_umask: | |
532 | if (match_octal(args, &option)) | |
533 | return 0; | |
534 | uopt->umask = option; | |
535 | break; | |
536 | case Opt_nostrict: | |
537 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
538 | break; | |
539 | case Opt_session: | |
540 | if (match_int(args, &option)) | |
541 | return 0; | |
542 | uopt->session = option; | |
6da80894 MS |
543 | if (!remount) |
544 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
545 | break; |
546 | case Opt_lastblock: | |
547 | if (match_int(args, &option)) | |
548 | return 0; | |
549 | uopt->lastblock = option; | |
6da80894 MS |
550 | if (!remount) |
551 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
552 | break; |
553 | case Opt_anchor: | |
554 | if (match_int(args, &option)) | |
555 | return 0; | |
556 | uopt->anchor = option; | |
557 | break; | |
558 | case Opt_volume: | |
cb00ea35 | 559 | case Opt_partition: |
cb00ea35 | 560 | case Opt_fileset: |
cb00ea35 | 561 | case Opt_rootdir: |
f0c4a817 | 562 | /* Ignored (never implemented properly) */ |
cb00ea35 CG |
563 | break; |
564 | case Opt_utf8: | |
565 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
566 | break; | |
cb00ea35 | 567 | case Opt_iocharset: |
785dffe1 CX |
568 | if (!remount) { |
569 | if (uopt->nls_map) | |
570 | unload_nls(uopt->nls_map); | |
a768a9ab JK |
571 | /* |
572 | * load_nls() failure is handled later in | |
573 | * udf_fill_super() after all options are | |
574 | * parsed. | |
575 | */ | |
785dffe1 CX |
576 | uopt->nls_map = load_nls(args[0].from); |
577 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
578 | } | |
cb00ea35 | 579 | break; |
cb00ea35 CG |
580 | case Opt_uforget: |
581 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
582 | break; | |
70260e44 | 583 | case Opt_uignore: |
cb00ea35 | 584 | case Opt_gignore: |
70260e44 | 585 | /* These options are superseeded by uid=<number> */ |
cb00ea35 CG |
586 | break; |
587 | case Opt_gforget: | |
588 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
589 | break; | |
7ac9bcd5 MS |
590 | case Opt_fmode: |
591 | if (match_octal(args, &option)) | |
592 | return 0; | |
593 | uopt->fmode = option & 0777; | |
594 | break; | |
595 | case Opt_dmode: | |
596 | if (match_octal(args, &option)) | |
597 | return 0; | |
598 | uopt->dmode = option & 0777; | |
599 | break; | |
cb00ea35 | 600 | default: |
78ace70c | 601 | pr_err("bad mount option \"%s\" or missing value\n", p); |
1da177e4 LT |
602 | return 0; |
603 | } | |
604 | } | |
605 | return 1; | |
606 | } | |
607 | ||
cb00ea35 | 608 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
609 | { |
610 | struct udf_options uopt; | |
6c79e987 | 611 | struct udf_sb_info *sbi = UDF_SB(sb); |
c79d967d | 612 | int error = 0; |
a9ad01bc JK |
613 | |
614 | if (!(*flags & SB_RDONLY) && UDF_QUERY_FLAG(sb, UDF_FLAG_RW_INCOMPAT)) | |
615 | return -EACCES; | |
1da177e4 | 616 | |
02b9984d | 617 | sync_filesystem(sb); |
e729eac6 | 618 | |
6c79e987 MS |
619 | uopt.flags = sbi->s_flags; |
620 | uopt.uid = sbi->s_uid; | |
621 | uopt.gid = sbi->s_gid; | |
622 | uopt.umask = sbi->s_umask; | |
7ac9bcd5 MS |
623 | uopt.fmode = sbi->s_fmode; |
624 | uopt.dmode = sbi->s_dmode; | |
785dffe1 | 625 | uopt.nls_map = NULL; |
1da177e4 | 626 | |
6da80894 | 627 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
628 | return -EINVAL; |
629 | ||
c03cad24 | 630 | write_lock(&sbi->s_cred_lock); |
6c79e987 MS |
631 | sbi->s_flags = uopt.flags; |
632 | sbi->s_uid = uopt.uid; | |
633 | sbi->s_gid = uopt.gid; | |
634 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
635 | sbi->s_fmode = uopt.fmode; |
636 | sbi->s_dmode = uopt.dmode; | |
c03cad24 | 637 | write_unlock(&sbi->s_cred_lock); |
1da177e4 | 638 | |
1751e8a6 | 639 | if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb)) |
c79d967d CH |
640 | goto out_unlock; |
641 | ||
1751e8a6 | 642 | if (*flags & SB_RDONLY) |
1da177e4 | 643 | udf_close_lvid(sb); |
36350462 | 644 | else |
1da177e4 LT |
645 | udf_open_lvid(sb); |
646 | ||
c79d967d | 647 | out_unlock: |
c79d967d | 648 | return error; |
1da177e4 LT |
649 | } |
650 | ||
ba54aef0 SM |
651 | /* |
652 | * Check VSD descriptor. Returns -1 in case we are at the end of volume | |
653 | * recognition area, 0 if the descriptor is valid but non-interesting, 1 if | |
654 | * we found one of NSR descriptors we are looking for. | |
655 | */ | |
656 | static int identify_vsd(const struct volStructDesc *vsd) | |
657 | { | |
658 | int ret = 0; | |
659 | ||
660 | if (!memcmp(vsd->stdIdent, VSD_STD_ID_CD001, VSD_STD_ID_LEN)) { | |
661 | switch (vsd->structType) { | |
662 | case 0: | |
663 | udf_debug("ISO9660 Boot Record found\n"); | |
664 | break; | |
665 | case 1: | |
666 | udf_debug("ISO9660 Primary Volume Descriptor found\n"); | |
667 | break; | |
668 | case 2: | |
669 | udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); | |
670 | break; | |
671 | case 3: | |
672 | udf_debug("ISO9660 Volume Partition Descriptor found\n"); | |
673 | break; | |
674 | case 255: | |
675 | udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); | |
676 | break; | |
677 | default: | |
678 | udf_debug("ISO9660 VRS (%u) found\n", vsd->structType); | |
679 | break; | |
680 | } | |
681 | } else if (!memcmp(vsd->stdIdent, VSD_STD_ID_BEA01, VSD_STD_ID_LEN)) | |
682 | ; /* ret = 0 */ | |
683 | else if (!memcmp(vsd->stdIdent, VSD_STD_ID_NSR02, VSD_STD_ID_LEN)) | |
684 | ret = 1; | |
685 | else if (!memcmp(vsd->stdIdent, VSD_STD_ID_NSR03, VSD_STD_ID_LEN)) | |
686 | ret = 1; | |
687 | else if (!memcmp(vsd->stdIdent, VSD_STD_ID_BOOT2, VSD_STD_ID_LEN)) | |
688 | ; /* ret = 0 */ | |
689 | else if (!memcmp(vsd->stdIdent, VSD_STD_ID_CDW02, VSD_STD_ID_LEN)) | |
690 | ; /* ret = 0 */ | |
691 | else { | |
692 | /* TEA01 or invalid id : end of volume recognition area */ | |
693 | ret = -1; | |
694 | } | |
695 | ||
696 | return ret; | |
697 | } | |
698 | ||
699 | /* | |
700 | * Check Volume Structure Descriptors (ECMA 167 2/9.1) | |
701 | * We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) | |
702 | * @return 1 if NSR02 or NSR03 found, | |
703 | * -1 if first sector read error, 0 otherwise | |
704 | */ | |
705 | static int udf_check_vsd(struct super_block *sb) | |
1da177e4 LT |
706 | { |
707 | struct volStructDesc *vsd = NULL; | |
44499602 | 708 | loff_t sector = VSD_FIRST_SECTOR_OFFSET; |
1da177e4 LT |
709 | int sectorsize; |
710 | struct buffer_head *bh = NULL; | |
ba54aef0 | 711 | int nsr = 0; |
6c79e987 | 712 | struct udf_sb_info *sbi; |
1da177e4 | 713 | |
6c79e987 | 714 | sbi = UDF_SB(sb); |
1da177e4 LT |
715 | if (sb->s_blocksize < sizeof(struct volStructDesc)) |
716 | sectorsize = sizeof(struct volStructDesc); | |
717 | else | |
718 | sectorsize = sb->s_blocksize; | |
719 | ||
abdc0eb0 | 720 | sector += (((loff_t)sbi->s_session) << sb->s_blocksize_bits); |
1da177e4 | 721 | |
fcbf7637 | 722 | udf_debug("Starting at sector %u (%lu byte sectors)\n", |
706047a7 SM |
723 | (unsigned int)(sector >> sb->s_blocksize_bits), |
724 | sb->s_blocksize); | |
44499602 PF |
725 | /* Process the sequence (if applicable). The hard limit on the sector |
726 | * offset is arbitrary, hopefully large enough so that all valid UDF | |
727 | * filesystems will be recognised. There is no mention of an upper | |
728 | * bound to the size of the volume recognition area in the standard. | |
729 | * The limit will prevent the code to read all the sectors of a | |
730 | * specially crafted image (like a bluray disc full of CD001 sectors), | |
731 | * potentially causing minutes or even hours of uninterruptible I/O | |
732 | * activity. This actually happened with uninitialised SSD partitions | |
733 | * (all 0xFF) before the check for the limit and all valid IDs were | |
734 | * added */ | |
ba54aef0 | 735 | for (; !nsr && sector < VSD_MAX_SECTOR_OFFSET; sector += sectorsize) { |
1da177e4 LT |
736 | /* Read a block */ |
737 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
738 | if (!bh) | |
739 | break; | |
740 | ||
1da177e4 | 741 | vsd = (struct volStructDesc *)(bh->b_data + |
3a71fc5d | 742 | (sector & (sb->s_blocksize - 1))); |
ba54aef0 | 743 | nsr = identify_vsd(vsd); |
6fbacb85 SM |
744 | /* Found NSR or end? */ |
745 | if (nsr) { | |
746 | brelse(bh); | |
747 | break; | |
748 | } | |
749 | /* | |
750 | * Special handling for improperly formatted VRS (e.g., Win10) | |
751 | * where components are separated by 2048 bytes even though | |
752 | * sectors are 4K | |
753 | */ | |
754 | if (sb->s_blocksize == 4096) { | |
755 | nsr = identify_vsd(vsd + 1); | |
756 | /* Ignore unknown IDs... */ | |
757 | if (nsr < 0) | |
758 | nsr = 0; | |
759 | } | |
3bf25cb4 | 760 | brelse(bh); |
1da177e4 LT |
761 | } |
762 | ||
ba54aef0 SM |
763 | if (nsr > 0) |
764 | return 1; | |
44499602 PF |
765 | else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) == |
766 | VSD_FIRST_SECTOR_OFFSET) | |
1da177e4 LT |
767 | return -1; |
768 | else | |
769 | return 0; | |
770 | } | |
771 | ||
3a71fc5d | 772 | static int udf_find_fileset(struct super_block *sb, |
5ca4e4be PE |
773 | struct kernel_lb_addr *fileset, |
774 | struct kernel_lb_addr *root) | |
1da177e4 LT |
775 | { |
776 | struct buffer_head *bh = NULL; | |
1da177e4 | 777 | uint16_t ident; |
2dee5aac | 778 | int ret; |
1da177e4 | 779 | |
2dee5aac JK |
780 | if (fileset->logicalBlockNum == 0xFFFFFFFF && |
781 | fileset->partitionReferenceNum == 0xFFFF) | |
782 | return -EINVAL; | |
1da177e4 | 783 | |
2dee5aac JK |
784 | bh = udf_read_ptagged(sb, fileset, 0, &ident); |
785 | if (!bh) | |
786 | return -EIO; | |
787 | if (ident != TAG_IDENT_FSD) { | |
3bf25cb4 | 788 | brelse(bh); |
2dee5aac | 789 | return -EINVAL; |
1da177e4 | 790 | } |
2dee5aac JK |
791 | |
792 | udf_debug("Fileset at block=%u, partition=%u\n", | |
793 | fileset->logicalBlockNum, fileset->partitionReferenceNum); | |
794 | ||
795 | UDF_SB(sb)->s_partition = fileset->partitionReferenceNum; | |
796 | ret = udf_load_fileset(sb, (struct fileSetDesc *)bh->b_data, root); | |
797 | brelse(bh); | |
798 | return ret; | |
1da177e4 LT |
799 | } |
800 | ||
d759bfa4 JK |
801 | /* |
802 | * Load primary Volume Descriptor Sequence | |
803 | * | |
804 | * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence | |
805 | * should be tried. | |
806 | */ | |
c0eb31ed | 807 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
808 | { |
809 | struct primaryVolDesc *pvoldesc; | |
9293fcfb | 810 | uint8_t *outstr; |
c0eb31ed JK |
811 | struct buffer_head *bh; |
812 | uint16_t ident; | |
d759bfa4 | 813 | int ret = -ENOMEM; |
0220edda | 814 | struct timestamp *ts; |
ba9aadd8 | 815 | |
9293fcfb | 816 | outstr = kmalloc(128, GFP_NOFS); |
ba9aadd8 | 817 | if (!outstr) |
9293fcfb | 818 | return -ENOMEM; |
c0eb31ed JK |
819 | |
820 | bh = udf_read_tagged(sb, block, block, &ident); | |
d759bfa4 JK |
821 | if (!bh) { |
822 | ret = -EAGAIN; | |
ba9aadd8 | 823 | goto out2; |
d759bfa4 | 824 | } |
ba9aadd8 | 825 | |
d759bfa4 JK |
826 | if (ident != TAG_IDENT_PVD) { |
827 | ret = -EIO; | |
828 | goto out_bh; | |
829 | } | |
1da177e4 LT |
830 | |
831 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
832 | ||
0220edda DD |
833 | udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
834 | pvoldesc->recordingDateAndTime); | |
0220edda DD |
835 | ts = &pvoldesc->recordingDateAndTime; |
836 | udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", | |
837 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, | |
838 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
1da177e4 | 839 | |
e966fc8d | 840 | ret = udf_dstrCS0toChar(sb, outstr, 31, pvoldesc->volIdent, 32); |
b54e41f5 JK |
841 | if (ret < 0) { |
842 | strcpy(UDF_SB(sb)->s_volume_ident, "InvalidName"); | |
843 | pr_warn("incorrect volume identification, setting to " | |
844 | "'InvalidName'\n"); | |
845 | } else { | |
846 | strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret); | |
847 | } | |
9293fcfb | 848 | udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident); |
1da177e4 | 849 | |
e966fc8d | 850 | ret = udf_dstrCS0toChar(sb, outstr, 127, pvoldesc->volSetIdent, 128); |
b54e41f5 JK |
851 | if (ret < 0) { |
852 | ret = 0; | |
9293fcfb | 853 | goto out_bh; |
b54e41f5 | 854 | } |
9293fcfb AG |
855 | outstr[ret] = 0; |
856 | udf_debug("volSetIdent[] = '%s'\n", outstr); | |
c0eb31ed | 857 | |
ba9aadd8 | 858 | ret = 0; |
d759bfa4 JK |
859 | out_bh: |
860 | brelse(bh); | |
ba9aadd8 MS |
861 | out2: |
862 | kfree(outstr); | |
ba9aadd8 | 863 | return ret; |
1da177e4 LT |
864 | } |
865 | ||
3080a74e | 866 | struct inode *udf_find_metadata_inode_efe(struct super_block *sb, |
7888824b | 867 | u32 meta_file_loc, u32 partition_ref) |
3080a74e NJ |
868 | { |
869 | struct kernel_lb_addr addr; | |
870 | struct inode *metadata_fe; | |
871 | ||
872 | addr.logicalBlockNum = meta_file_loc; | |
7888824b | 873 | addr.partitionReferenceNum = partition_ref; |
3080a74e | 874 | |
6174c2eb | 875 | metadata_fe = udf_iget_special(sb, &addr); |
3080a74e | 876 | |
6d3d5e86 | 877 | if (IS_ERR(metadata_fe)) { |
3080a74e | 878 | udf_warn(sb, "metadata inode efe not found\n"); |
6d3d5e86 JK |
879 | return metadata_fe; |
880 | } | |
881 | if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { | |
3080a74e NJ |
882 | udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); |
883 | iput(metadata_fe); | |
6d3d5e86 | 884 | return ERR_PTR(-EIO); |
3080a74e NJ |
885 | } |
886 | ||
887 | return metadata_fe; | |
888 | } | |
889 | ||
7888824b AT |
890 | static int udf_load_metadata_files(struct super_block *sb, int partition, |
891 | int type1_index) | |
bfb257a5 JK |
892 | { |
893 | struct udf_sb_info *sbi = UDF_SB(sb); | |
894 | struct udf_part_map *map; | |
895 | struct udf_meta_data *mdata; | |
5ca4e4be | 896 | struct kernel_lb_addr addr; |
6d3d5e86 | 897 | struct inode *fe; |
bfb257a5 JK |
898 | |
899 | map = &sbi->s_partmaps[partition]; | |
900 | mdata = &map->s_type_specific.s_metadata; | |
7888824b | 901 | mdata->s_phys_partition_ref = type1_index; |
bfb257a5 JK |
902 | |
903 | /* metadata address */ | |
fcbf7637 | 904 | udf_debug("Metadata file location: block = %u part = %u\n", |
7888824b | 905 | mdata->s_meta_file_loc, mdata->s_phys_partition_ref); |
bfb257a5 | 906 | |
6d3d5e86 | 907 | fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc, |
7888824b | 908 | mdata->s_phys_partition_ref); |
6d3d5e86 | 909 | if (IS_ERR(fe)) { |
3080a74e | 910 | /* mirror file entry */ |
fcbf7637 | 911 | udf_debug("Mirror metadata file location: block = %u part = %u\n", |
7888824b | 912 | mdata->s_mirror_file_loc, mdata->s_phys_partition_ref); |
bfb257a5 | 913 | |
6d3d5e86 | 914 | fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc, |
7888824b | 915 | mdata->s_phys_partition_ref); |
bfb257a5 | 916 | |
6d3d5e86 | 917 | if (IS_ERR(fe)) { |
3080a74e | 918 | udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); |
6d3d5e86 | 919 | return PTR_ERR(fe); |
3080a74e | 920 | } |
6d3d5e86 JK |
921 | mdata->s_mirror_fe = fe; |
922 | } else | |
923 | mdata->s_metadata_fe = fe; | |
924 | ||
bfb257a5 JK |
925 | |
926 | /* | |
927 | * bitmap file entry | |
928 | * Note: | |
929 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) | |
930 | */ | |
931 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { | |
932 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; | |
7888824b | 933 | addr.partitionReferenceNum = mdata->s_phys_partition_ref; |
bfb257a5 | 934 | |
fcbf7637 | 935 | udf_debug("Bitmap file location: block = %u part = %u\n", |
a983f368 | 936 | addr.logicalBlockNum, addr.partitionReferenceNum); |
bfb257a5 | 937 | |
6174c2eb | 938 | fe = udf_iget_special(sb, &addr); |
6d3d5e86 | 939 | if (IS_ERR(fe)) { |
bc98a42c | 940 | if (sb_rdonly(sb)) |
a40ecd7b | 941 | udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); |
bfb257a5 | 942 | else { |
8076c363 | 943 | udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); |
6d3d5e86 | 944 | return PTR_ERR(fe); |
bfb257a5 | 945 | } |
6d3d5e86 JK |
946 | } else |
947 | mdata->s_bitmap_fe = fe; | |
bfb257a5 JK |
948 | } |
949 | ||
950 | udf_debug("udf_load_metadata_files Ok\n"); | |
bfb257a5 | 951 | return 0; |
bfb257a5 JK |
952 | } |
953 | ||
2dee5aac JK |
954 | static int udf_verify_domain_identifier(struct super_block *sb, |
955 | struct regid *ident, char *dname) | |
1da177e4 | 956 | { |
2dee5aac | 957 | struct domainEntityIDSuffix *suffix; |
1da177e4 | 958 | |
2dee5aac JK |
959 | if (memcmp(ident->ident, UDF_ID_COMPLIANT, strlen(UDF_ID_COMPLIANT))) { |
960 | udf_warn(sb, "Not OSTA UDF compliant %s descriptor.\n", dname); | |
961 | goto force_ro; | |
962 | } | |
963 | if (ident->flags & (1 << ENTITYID_FLAGS_DIRTY)) { | |
964 | udf_warn(sb, "Possibly not OSTA UDF compliant %s descriptor.\n", | |
965 | dname); | |
966 | goto force_ro; | |
967 | } | |
968 | suffix = (struct domainEntityIDSuffix *)ident->identSuffix; | |
969 | if (suffix->flags & (1 << ENTITYIDSUFFIX_FLAGS_HARDWRITEPROTECT) || | |
970 | suffix->flags & (1 << ENTITYIDSUFFIX_FLAGS_SOFTWRITEPROTECT)) { | |
971 | if (!sb_rdonly(sb)) { | |
972 | udf_warn(sb, "Descriptor for %s marked write protected." | |
973 | " Forcing read only mount.\n", dname); | |
974 | } | |
975 | goto force_ro; | |
976 | } | |
977 | return 0; | |
1da177e4 | 978 | |
2dee5aac JK |
979 | force_ro: |
980 | if (!sb_rdonly(sb)) | |
981 | return -EACCES; | |
982 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); | |
983 | return 0; | |
984 | } | |
1da177e4 | 985 | |
2dee5aac JK |
986 | static int udf_load_fileset(struct super_block *sb, struct fileSetDesc *fset, |
987 | struct kernel_lb_addr *root) | |
988 | { | |
989 | int ret; | |
990 | ||
991 | ret = udf_verify_domain_identifier(sb, &fset->domainIdent, "file set"); | |
992 | if (ret < 0) | |
993 | return ret; | |
994 | ||
995 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
6c79e987 | 996 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 997 | |
fcbf7637 | 998 | udf_debug("Rootdir at block=%u, partition=%u\n", |
cb00ea35 | 999 | root->logicalBlockNum, root->partitionReferenceNum); |
2dee5aac | 1000 | return 0; |
1da177e4 LT |
1001 | } |
1002 | ||
883cb9d1 MS |
1003 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
1004 | { | |
1005 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
1006 | return DIV_ROUND_UP(map->s_partition_len + |
1007 | (sizeof(struct spaceBitmapDesc) << 3), | |
1008 | sb->s_blocksize * 8); | |
883cb9d1 MS |
1009 | } |
1010 | ||
66e1da3f MS |
1011 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
1012 | { | |
66e1da3f MS |
1013 | struct udf_bitmap *bitmap; |
1014 | int nr_groups; | |
1015 | int size; | |
1016 | ||
883cb9d1 | 1017 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
1018 | size = sizeof(struct udf_bitmap) + |
1019 | (sizeof(struct buffer_head *) * nr_groups); | |
1020 | ||
1021 | if (size <= PAGE_SIZE) | |
ed2ae6f6 | 1022 | bitmap = kzalloc(size, GFP_KERNEL); |
66e1da3f | 1023 | else |
ed2ae6f6 | 1024 | bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ |
66e1da3f | 1025 | |
ba2eb866 | 1026 | if (!bitmap) |
66e1da3f | 1027 | return NULL; |
66e1da3f | 1028 | |
66e1da3f MS |
1029 | bitmap->s_nr_groups = nr_groups; |
1030 | return bitmap; | |
1031 | } | |
1032 | ||
b085fbe2 JK |
1033 | static int check_partition_desc(struct super_block *sb, |
1034 | struct partitionDesc *p, | |
1035 | struct udf_part_map *map) | |
1036 | { | |
1037 | bool umap, utable, fmap, ftable; | |
1038 | struct partitionHeaderDesc *phd; | |
1039 | ||
1040 | switch (le32_to_cpu(p->accessType)) { | |
1041 | case PD_ACCESS_TYPE_READ_ONLY: | |
1042 | case PD_ACCESS_TYPE_WRITE_ONCE: | |
1043 | case PD_ACCESS_TYPE_REWRITABLE: | |
1044 | case PD_ACCESS_TYPE_NONE: | |
1045 | goto force_ro; | |
1046 | } | |
1047 | ||
1048 | /* No Partition Header Descriptor? */ | |
1049 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
1050 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
1051 | goto force_ro; | |
1052 | ||
1053 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1054 | utable = phd->unallocSpaceTable.extLength; | |
1055 | umap = phd->unallocSpaceBitmap.extLength; | |
1056 | ftable = phd->freedSpaceTable.extLength; | |
1057 | fmap = phd->freedSpaceBitmap.extLength; | |
1058 | ||
1059 | /* No allocation info? */ | |
1060 | if (!utable && !umap && !ftable && !fmap) | |
1061 | goto force_ro; | |
1062 | ||
1063 | /* We don't support blocks that require erasing before overwrite */ | |
1064 | if (ftable || fmap) | |
1065 | goto force_ro; | |
1066 | /* UDF 2.60: 2.3.3 - no mixing of tables & bitmaps, no VAT. */ | |
1067 | if (utable && umap) | |
1068 | goto force_ro; | |
1069 | ||
1070 | if (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
1071 | map->s_partition_type == UDF_VIRTUAL_MAP20) | |
1072 | goto force_ro; | |
1073 | ||
1074 | return 0; | |
1075 | force_ro: | |
1076 | if (!sb_rdonly(sb)) | |
1077 | return -EACCES; | |
1078 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); | |
1079 | return 0; | |
1080 | } | |
1081 | ||
3fb38dfa JK |
1082 | static int udf_fill_partdesc_info(struct super_block *sb, |
1083 | struct partitionDesc *p, int p_index) | |
1da177e4 | 1084 | { |
6c79e987 | 1085 | struct udf_part_map *map; |
165923fa | 1086 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 1087 | struct partitionHeaderDesc *phd; |
b085fbe2 | 1088 | int err; |
165923fa | 1089 | |
3fb38dfa | 1090 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
1091 | |
1092 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
1093 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
1094 | ||
1095 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
1096 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
1097 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
1098 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
1099 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
1100 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
1101 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
1102 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
1103 | ||
fcbf7637 | 1104 | udf_debug("Partition (%d type %x) starts at physical %u, block length %u\n", |
a983f368 JP |
1105 | p_index, map->s_partition_type, |
1106 | map->s_partition_root, map->s_partition_len); | |
165923fa | 1107 | |
b085fbe2 JK |
1108 | err = check_partition_desc(sb, p, map); |
1109 | if (err) | |
1110 | return err; | |
1111 | ||
1112 | /* | |
1113 | * Skip loading allocation info it we cannot ever write to the fs. | |
1114 | * This is a correctness thing as we may have decided to force ro mount | |
1115 | * to avoid allocation info we don't support. | |
1116 | */ | |
1117 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_RW_INCOMPAT)) | |
3fb38dfa | 1118 | return 0; |
165923fa MS |
1119 | |
1120 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1121 | if (phd->unallocSpaceTable.extLength) { | |
5ca4e4be | 1122 | struct kernel_lb_addr loc = { |
165923fa MS |
1123 | .logicalBlockNum = le32_to_cpu( |
1124 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 1125 | .partitionReferenceNum = p_index, |
165923fa | 1126 | }; |
6d3d5e86 | 1127 | struct inode *inode; |
165923fa | 1128 | |
6174c2eb | 1129 | inode = udf_iget_special(sb, &loc); |
6d3d5e86 | 1130 | if (IS_ERR(inode)) { |
165923fa | 1131 | udf_debug("cannot load unallocSpaceTable (part %d)\n", |
a983f368 | 1132 | p_index); |
6d3d5e86 | 1133 | return PTR_ERR(inode); |
165923fa | 1134 | } |
6d3d5e86 | 1135 | map->s_uspace.s_table = inode; |
165923fa | 1136 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; |
fcbf7637 | 1137 | udf_debug("unallocSpaceTable (part %d) @ %lu\n", |
a983f368 | 1138 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1139 | } |
1140 | ||
1141 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1142 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1143 | if (!bitmap) | |
d759bfa4 | 1144 | return -ENOMEM; |
165923fa | 1145 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1146 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1147 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1148 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
fcbf7637 | 1149 | udf_debug("unallocSpaceBitmap (part %d) @ %u\n", |
a983f368 | 1150 | p_index, bitmap->s_extPosition); |
165923fa MS |
1151 | } |
1152 | ||
3fb38dfa JK |
1153 | return 0; |
1154 | } | |
1155 | ||
e971b0b9 JK |
1156 | static void udf_find_vat_block(struct super_block *sb, int p_index, |
1157 | int type1_index, sector_t start_block) | |
38b74a53 JK |
1158 | { |
1159 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1160 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
e971b0b9 | 1161 | sector_t vat_block; |
5ca4e4be | 1162 | struct kernel_lb_addr ino; |
6d3d5e86 | 1163 | struct inode *inode; |
e971b0b9 JK |
1164 | |
1165 | /* | |
1166 | * VAT file entry is in the last recorded block. Some broken disks have | |
1167 | * it a few blocks before so try a bit harder... | |
1168 | */ | |
1169 | ino.partitionReferenceNum = type1_index; | |
1170 | for (vat_block = start_block; | |
1171 | vat_block >= map->s_partition_root && | |
6d3d5e86 | 1172 | vat_block >= start_block - 3; vat_block--) { |
e971b0b9 | 1173 | ino.logicalBlockNum = vat_block - map->s_partition_root; |
6174c2eb | 1174 | inode = udf_iget_special(sb, &ino); |
6d3d5e86 JK |
1175 | if (!IS_ERR(inode)) { |
1176 | sbi->s_vat_inode = inode; | |
1177 | break; | |
1178 | } | |
e971b0b9 JK |
1179 | } |
1180 | } | |
1181 | ||
1182 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) | |
1183 | { | |
1184 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1185 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
fa5e0815 JK |
1186 | struct buffer_head *bh = NULL; |
1187 | struct udf_inode_info *vati; | |
1188 | uint32_t pos; | |
1189 | struct virtualAllocationTable20 *vat20; | |
23bcda11 FF |
1190 | sector_t blocks = i_size_read(sb->s_bdev->bd_inode) >> |
1191 | sb->s_blocksize_bits; | |
38b74a53 | 1192 | |
e971b0b9 | 1193 | udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); |
4bf17af0 JK |
1194 | if (!sbi->s_vat_inode && |
1195 | sbi->s_last_block != blocks - 1) { | |
78ace70c JP |
1196 | pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", |
1197 | (unsigned long)sbi->s_last_block, | |
1198 | (unsigned long)blocks - 1); | |
e971b0b9 | 1199 | udf_find_vat_block(sb, p_index, type1_index, blocks - 1); |
4bf17af0 | 1200 | } |
38b74a53 | 1201 | if (!sbi->s_vat_inode) |
d759bfa4 | 1202 | return -EIO; |
38b74a53 JK |
1203 | |
1204 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
47c9358a | 1205 | map->s_type_specific.s_virtual.s_start_offset = 0; |
38b74a53 JK |
1206 | map->s_type_specific.s_virtual.s_num_entries = |
1207 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1208 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
fa5e0815 JK |
1209 | vati = UDF_I(sbi->s_vat_inode); |
1210 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1211 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1212 | bh = sb_bread(sb, pos); | |
1213 | if (!bh) | |
d759bfa4 | 1214 | return -EIO; |
fa5e0815 JK |
1215 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; |
1216 | } else { | |
1217 | vat20 = (struct virtualAllocationTable20 *) | |
1218 | vati->i_ext.i_data; | |
1219 | } | |
38b74a53 | 1220 | |
38b74a53 | 1221 | map->s_type_specific.s_virtual.s_start_offset = |
47c9358a | 1222 | le16_to_cpu(vat20->lengthHeader); |
38b74a53 JK |
1223 | map->s_type_specific.s_virtual.s_num_entries = |
1224 | (sbi->s_vat_inode->i_size - | |
1225 | map->s_type_specific.s_virtual. | |
1226 | s_start_offset) >> 2; | |
1227 | brelse(bh); | |
1228 | } | |
1229 | return 0; | |
1230 | } | |
1231 | ||
d759bfa4 JK |
1232 | /* |
1233 | * Load partition descriptor block | |
1234 | * | |
1235 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor | |
1236 | * sequence. | |
1237 | */ | |
3fb38dfa JK |
1238 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
1239 | { | |
1240 | struct buffer_head *bh; | |
1241 | struct partitionDesc *p; | |
1242 | struct udf_part_map *map; | |
1243 | struct udf_sb_info *sbi = UDF_SB(sb); | |
38b74a53 | 1244 | int i, type1_idx; |
3fb38dfa JK |
1245 | uint16_t partitionNumber; |
1246 | uint16_t ident; | |
d759bfa4 | 1247 | int ret; |
3fb38dfa JK |
1248 | |
1249 | bh = udf_read_tagged(sb, block, block, &ident); | |
1250 | if (!bh) | |
d759bfa4 JK |
1251 | return -EAGAIN; |
1252 | if (ident != TAG_IDENT_PD) { | |
1253 | ret = 0; | |
3fb38dfa | 1254 | goto out_bh; |
d759bfa4 | 1255 | } |
3fb38dfa JK |
1256 | |
1257 | p = (struct partitionDesc *)bh->b_data; | |
1258 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
38b74a53 | 1259 | |
7888824b | 1260 | /* First scan for TYPE1 and SPARABLE partitions */ |
3fb38dfa JK |
1261 | for (i = 0; i < sbi->s_partitions; i++) { |
1262 | map = &sbi->s_partmaps[i]; | |
fcbf7637 | 1263 | udf_debug("Searching map: (%u == %u)\n", |
3fb38dfa | 1264 | map->s_partition_num, partitionNumber); |
38b74a53 JK |
1265 | if (map->s_partition_num == partitionNumber && |
1266 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1267 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
3fb38dfa JK |
1268 | break; |
1269 | } | |
1270 | ||
38b74a53 | 1271 | if (i >= sbi->s_partitions) { |
fcbf7637 | 1272 | udf_debug("Partition (%u) not found in partition map\n", |
3fb38dfa | 1273 | partitionNumber); |
d759bfa4 | 1274 | ret = 0; |
3fb38dfa JK |
1275 | goto out_bh; |
1276 | } | |
165923fa | 1277 | |
3fb38dfa | 1278 | ret = udf_fill_partdesc_info(sb, p, i); |
d759bfa4 JK |
1279 | if (ret < 0) |
1280 | goto out_bh; | |
38b74a53 JK |
1281 | |
1282 | /* | |
bfb257a5 JK |
1283 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
1284 | * PHYSICAL partitions are already set up | |
38b74a53 JK |
1285 | */ |
1286 | type1_idx = i; | |
44499602 | 1287 | map = NULL; /* supress 'maybe used uninitialized' warning */ |
38b74a53 JK |
1288 | for (i = 0; i < sbi->s_partitions; i++) { |
1289 | map = &sbi->s_partmaps[i]; | |
1290 | ||
1291 | if (map->s_partition_num == partitionNumber && | |
1292 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
bfb257a5 JK |
1293 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
1294 | map->s_partition_type == UDF_METADATA_MAP25)) | |
38b74a53 JK |
1295 | break; |
1296 | } | |
1297 | ||
d759bfa4 JK |
1298 | if (i >= sbi->s_partitions) { |
1299 | ret = 0; | |
38b74a53 | 1300 | goto out_bh; |
d759bfa4 | 1301 | } |
38b74a53 JK |
1302 | |
1303 | ret = udf_fill_partdesc_info(sb, p, i); | |
d759bfa4 | 1304 | if (ret < 0) |
38b74a53 JK |
1305 | goto out_bh; |
1306 | ||
bfb257a5 | 1307 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
7888824b | 1308 | ret = udf_load_metadata_files(sb, i, type1_idx); |
d759bfa4 | 1309 | if (ret < 0) { |
78ace70c JP |
1310 | udf_err(sb, "error loading MetaData partition map %d\n", |
1311 | i); | |
bfb257a5 JK |
1312 | goto out_bh; |
1313 | } | |
1314 | } else { | |
e729eac6 JK |
1315 | /* |
1316 | * If we have a partition with virtual map, we don't handle | |
1317 | * writing to it (we overwrite blocks instead of relocating | |
1318 | * them). | |
1319 | */ | |
bc98a42c | 1320 | if (!sb_rdonly(sb)) { |
e729eac6 JK |
1321 | ret = -EACCES; |
1322 | goto out_bh; | |
1323 | } | |
a9ad01bc | 1324 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); |
bfb257a5 | 1325 | ret = udf_load_vat(sb, i, type1_idx); |
d759bfa4 | 1326 | if (ret < 0) |
bfb257a5 | 1327 | goto out_bh; |
bfb257a5 | 1328 | } |
d759bfa4 | 1329 | ret = 0; |
c0eb31ed | 1330 | out_bh: |
2e0838fd | 1331 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1332 | brelse(bh); |
1333 | return ret; | |
1da177e4 LT |
1334 | } |
1335 | ||
1df2ae31 JK |
1336 | static int udf_load_sparable_map(struct super_block *sb, |
1337 | struct udf_part_map *map, | |
1338 | struct sparablePartitionMap *spm) | |
1339 | { | |
1340 | uint32_t loc; | |
1341 | uint16_t ident; | |
1342 | struct sparingTable *st; | |
1343 | struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing; | |
1344 | int i; | |
1345 | struct buffer_head *bh; | |
1346 | ||
1347 | map->s_partition_type = UDF_SPARABLE_MAP15; | |
1348 | sdata->s_packet_len = le16_to_cpu(spm->packetLength); | |
1349 | if (!is_power_of_2(sdata->s_packet_len)) { | |
1350 | udf_err(sb, "error loading logical volume descriptor: " | |
1351 | "Invalid packet length %u\n", | |
1352 | (unsigned)sdata->s_packet_len); | |
1353 | return -EIO; | |
1354 | } | |
1355 | if (spm->numSparingTables > 4) { | |
1356 | udf_err(sb, "error loading logical volume descriptor: " | |
1357 | "Too many sparing tables (%d)\n", | |
1358 | (int)spm->numSparingTables); | |
1359 | return -EIO; | |
1360 | } | |
1361 | ||
1362 | for (i = 0; i < spm->numSparingTables; i++) { | |
1363 | loc = le32_to_cpu(spm->locSparingTable[i]); | |
1364 | bh = udf_read_tagged(sb, loc, loc, &ident); | |
1365 | if (!bh) | |
1366 | continue; | |
1367 | ||
1368 | st = (struct sparingTable *)bh->b_data; | |
1369 | if (ident != 0 || | |
1370 | strncmp(st->sparingIdent.ident, UDF_ID_SPARING, | |
1371 | strlen(UDF_ID_SPARING)) || | |
1372 | sizeof(*st) + le16_to_cpu(st->reallocationTableLen) > | |
1373 | sb->s_blocksize) { | |
1374 | brelse(bh); | |
1375 | continue; | |
1376 | } | |
1377 | ||
1378 | sdata->s_spar_map[i] = bh; | |
1379 | } | |
1380 | map->s_partition_func = udf_get_pblock_spar15; | |
1381 | return 0; | |
1382 | } | |
1383 | ||
c0eb31ed | 1384 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
5ca4e4be | 1385 | struct kernel_lb_addr *fileset) |
1da177e4 LT |
1386 | { |
1387 | struct logicalVolDesc *lvd; | |
1df2ae31 | 1388 | int i, offset; |
1da177e4 | 1389 | uint8_t type; |
6c79e987 | 1390 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1391 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1392 | uint16_t ident; |
1393 | struct buffer_head *bh; | |
adee11b2 | 1394 | unsigned int table_len; |
d759bfa4 | 1395 | int ret; |
1da177e4 | 1396 | |
c0eb31ed JK |
1397 | bh = udf_read_tagged(sb, block, block, &ident); |
1398 | if (!bh) | |
d759bfa4 | 1399 | return -EAGAIN; |
c0eb31ed | 1400 | BUG_ON(ident != TAG_IDENT_LVD); |
1da177e4 | 1401 | lvd = (struct logicalVolDesc *)bh->b_data; |
adee11b2 | 1402 | table_len = le32_to_cpu(lvd->mapTableLength); |
57b9655d | 1403 | if (table_len > sb->s_blocksize - sizeof(*lvd)) { |
adee11b2 JK |
1404 | udf_err(sb, "error loading logical volume descriptor: " |
1405 | "Partition table too long (%u > %lu)\n", table_len, | |
1406 | sb->s_blocksize - sizeof(*lvd)); | |
d759bfa4 | 1407 | ret = -EIO; |
adee11b2 JK |
1408 | goto out_bh; |
1409 | } | |
1da177e4 | 1410 | |
2dee5aac JK |
1411 | ret = udf_verify_domain_identifier(sb, &lvd->domainIdent, |
1412 | "logical volume"); | |
1413 | if (ret) | |
1414 | goto out_bh; | |
cb14d340 JK |
1415 | ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
1416 | if (ret) | |
c0eb31ed | 1417 | goto out_bh; |
1da177e4 | 1418 | |
cb00ea35 | 1419 | for (i = 0, offset = 0; |
adee11b2 | 1420 | i < sbi->s_partitions && offset < table_len; |
4b11111a MS |
1421 | i++, offset += gpm->partitionMapLength) { |
1422 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1423 | gpm = (struct genericPartitionMap *) | |
1424 | &(lvd->partitionMaps[offset]); | |
1425 | type = gpm->partitionMapType; | |
cb00ea35 | 1426 | if (type == 1) { |
4b11111a MS |
1427 | struct genericPartitionMap1 *gpm1 = |
1428 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1429 | map->s_partition_type = UDF_TYPE1_MAP15; |
1430 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1431 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1432 | map->s_partition_func = NULL; | |
cb00ea35 | 1433 | } else if (type == 2) { |
4b11111a MS |
1434 | struct udfPartitionMap2 *upm2 = |
1435 | (struct udfPartitionMap2 *)gpm; | |
1436 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1437 | strlen(UDF_ID_VIRTUAL))) { | |
1438 | u16 suf = | |
1439 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1440 | identSuffix)[0]); | |
c82a1275 | 1441 | if (suf < 0x0200) { |
4b11111a MS |
1442 | map->s_partition_type = |
1443 | UDF_VIRTUAL_MAP15; | |
1444 | map->s_partition_func = | |
1445 | udf_get_pblock_virt15; | |
c82a1275 | 1446 | } else { |
4b11111a MS |
1447 | map->s_partition_type = |
1448 | UDF_VIRTUAL_MAP20; | |
1449 | map->s_partition_func = | |
1450 | udf_get_pblock_virt20; | |
1da177e4 | 1451 | } |
4b11111a MS |
1452 | } else if (!strncmp(upm2->partIdent.ident, |
1453 | UDF_ID_SPARABLE, | |
1454 | strlen(UDF_ID_SPARABLE))) { | |
d759bfa4 JK |
1455 | ret = udf_load_sparable_map(sb, map, |
1456 | (struct sparablePartitionMap *)gpm); | |
1457 | if (ret < 0) | |
1df2ae31 | 1458 | goto out_bh; |
bfb257a5 JK |
1459 | } else if (!strncmp(upm2->partIdent.ident, |
1460 | UDF_ID_METADATA, | |
1461 | strlen(UDF_ID_METADATA))) { | |
1462 | struct udf_meta_data *mdata = | |
1463 | &map->s_type_specific.s_metadata; | |
1464 | struct metadataPartitionMap *mdm = | |
1465 | (struct metadataPartitionMap *) | |
1466 | &(lvd->partitionMaps[offset]); | |
fcbf7637 | 1467 | udf_debug("Parsing Logical vol part %d type %u id=%s\n", |
a983f368 | 1468 | i, type, UDF_ID_METADATA); |
bfb257a5 JK |
1469 | |
1470 | map->s_partition_type = UDF_METADATA_MAP25; | |
1471 | map->s_partition_func = udf_get_pblock_meta25; | |
1472 | ||
1473 | mdata->s_meta_file_loc = | |
1474 | le32_to_cpu(mdm->metadataFileLoc); | |
1475 | mdata->s_mirror_file_loc = | |
1476 | le32_to_cpu(mdm->metadataMirrorFileLoc); | |
1477 | mdata->s_bitmap_file_loc = | |
1478 | le32_to_cpu(mdm->metadataBitmapFileLoc); | |
1479 | mdata->s_alloc_unit_size = | |
1480 | le32_to_cpu(mdm->allocUnitSize); | |
1481 | mdata->s_align_unit_size = | |
1482 | le16_to_cpu(mdm->alignUnitSize); | |
ed47a7d0 JK |
1483 | if (mdm->flags & 0x01) |
1484 | mdata->s_flags |= MF_DUPLICATE_MD; | |
bfb257a5 JK |
1485 | |
1486 | udf_debug("Metadata Ident suffix=0x%x\n", | |
a983f368 JP |
1487 | le16_to_cpu(*(__le16 *) |
1488 | mdm->partIdent.identSuffix)); | |
fcbf7637 | 1489 | udf_debug("Metadata part num=%u\n", |
a983f368 | 1490 | le16_to_cpu(mdm->partitionNum)); |
fcbf7637 | 1491 | udf_debug("Metadata part alloc unit size=%u\n", |
a983f368 | 1492 | le32_to_cpu(mdm->allocUnitSize)); |
fcbf7637 | 1493 | udf_debug("Metadata file loc=%u\n", |
a983f368 | 1494 | le32_to_cpu(mdm->metadataFileLoc)); |
fcbf7637 | 1495 | udf_debug("Mirror file loc=%u\n", |
a983f368 | 1496 | le32_to_cpu(mdm->metadataMirrorFileLoc)); |
fcbf7637 | 1497 | udf_debug("Bitmap file loc=%u\n", |
a983f368 | 1498 | le32_to_cpu(mdm->metadataBitmapFileLoc)); |
fcbf7637 | 1499 | udf_debug("Flags: %d %u\n", |
ed47a7d0 | 1500 | mdata->s_flags, mdm->flags); |
cb00ea35 | 1501 | } else { |
3a71fc5d MS |
1502 | udf_debug("Unknown ident: %s\n", |
1503 | upm2->partIdent.ident); | |
1da177e4 LT |
1504 | continue; |
1505 | } | |
6c79e987 MS |
1506 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1507 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 | 1508 | } |
fcbf7637 | 1509 | udf_debug("Partition (%d:%u) type %u on volume %u\n", |
a983f368 | 1510 | i, map->s_partition_num, type, map->s_volumeseqnum); |
1da177e4 LT |
1511 | } |
1512 | ||
cb00ea35 | 1513 | if (fileset) { |
5ca4e4be | 1514 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1515 | |
1516 | *fileset = lelb_to_cpu(la->extLocation); | |
fcbf7637 | 1517 | udf_debug("FileSet found in LogicalVolDesc at block=%u, partition=%u\n", |
a983f368 | 1518 | fileset->logicalBlockNum, |
28de7948 | 1519 | fileset->partitionReferenceNum); |
1da177e4 LT |
1520 | } |
1521 | if (lvd->integritySeqExt.extLength) | |
1522 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
d759bfa4 | 1523 | ret = 0; |
4f5edd82 SM |
1524 | |
1525 | if (!sbi->s_lvid_bh) { | |
1526 | /* We can't generate unique IDs without a valid LVID */ | |
1527 | if (sb_rdonly(sb)) { | |
1528 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); | |
1529 | } else { | |
1530 | udf_warn(sb, "Damaged or missing LVID, forcing " | |
1531 | "readonly mount\n"); | |
1532 | ret = -EACCES; | |
1533 | } | |
1534 | } | |
c0eb31ed JK |
1535 | out_bh: |
1536 | brelse(bh); | |
1537 | return ret; | |
1da177e4 LT |
1538 | } |
1539 | ||
1540 | /* | |
a47241cd | 1541 | * Find the prevailing Logical Volume Integrity Descriptor. |
1da177e4 | 1542 | */ |
5ca4e4be | 1543 | static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) |
1da177e4 | 1544 | { |
a47241cd | 1545 | struct buffer_head *bh, *final_bh; |
1da177e4 | 1546 | uint16_t ident; |
6c79e987 MS |
1547 | struct udf_sb_info *sbi = UDF_SB(sb); |
1548 | struct logicalVolIntegrityDesc *lvid; | |
a47241cd AT |
1549 | int indirections = 0; |
1550 | ||
1551 | while (++indirections <= UDF_MAX_LVID_NESTING) { | |
1552 | final_bh = NULL; | |
1553 | while (loc.extLength > 0 && | |
1554 | (bh = udf_read_tagged(sb, loc.extLocation, | |
1555 | loc.extLocation, &ident))) { | |
1556 | if (ident != TAG_IDENT_LVID) { | |
1557 | brelse(bh); | |
1558 | break; | |
1559 | } | |
1560 | ||
1561 | brelse(final_bh); | |
1562 | final_bh = bh; | |
1da177e4 | 1563 | |
a47241cd AT |
1564 | loc.extLength -= sb->s_blocksize; |
1565 | loc.extLocation++; | |
1566 | } | |
cb00ea35 | 1567 | |
a47241cd AT |
1568 | if (!final_bh) |
1569 | return; | |
cb00ea35 | 1570 | |
a47241cd AT |
1571 | brelse(sbi->s_lvid_bh); |
1572 | sbi->s_lvid_bh = final_bh; | |
1573 | ||
1574 | lvid = (struct logicalVolIntegrityDesc *)final_bh->b_data; | |
1575 | if (lvid->nextIntegrityExt.extLength == 0) | |
1576 | return; | |
1577 | ||
1578 | loc = leea_to_cpu(lvid->nextIntegrityExt); | |
1da177e4 | 1579 | } |
a47241cd AT |
1580 | |
1581 | udf_warn(sb, "Too many LVID indirections (max %u), ignoring.\n", | |
1582 | UDF_MAX_LVID_NESTING); | |
1583 | brelse(sbi->s_lvid_bh); | |
1584 | sbi->s_lvid_bh = NULL; | |
1da177e4 LT |
1585 | } |
1586 | ||
7b78fd02 JK |
1587 | /* |
1588 | * Step for reallocation of table of partition descriptor sequence numbers. | |
1589 | * Must be power of 2. | |
1590 | */ | |
1591 | #define PART_DESC_ALLOC_STEP 32 | |
1592 | ||
ee4af50c JK |
1593 | struct part_desc_seq_scan_data { |
1594 | struct udf_vds_record rec; | |
1595 | u32 partnum; | |
1596 | }; | |
1597 | ||
7b78fd02 JK |
1598 | struct desc_seq_scan_data { |
1599 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
1600 | unsigned int size_part_descs; | |
ee4af50c JK |
1601 | unsigned int num_part_descs; |
1602 | struct part_desc_seq_scan_data *part_descs_loc; | |
7b78fd02 JK |
1603 | }; |
1604 | ||
1605 | static struct udf_vds_record *handle_partition_descriptor( | |
1606 | struct buffer_head *bh, | |
1607 | struct desc_seq_scan_data *data) | |
1608 | { | |
1609 | struct partitionDesc *desc = (struct partitionDesc *)bh->b_data; | |
1610 | int partnum; | |
ee4af50c | 1611 | int i; |
7b78fd02 JK |
1612 | |
1613 | partnum = le16_to_cpu(desc->partitionNumber); | |
ee4af50c JK |
1614 | for (i = 0; i < data->num_part_descs; i++) |
1615 | if (partnum == data->part_descs_loc[i].partnum) | |
1616 | return &(data->part_descs_loc[i].rec); | |
1617 | if (data->num_part_descs >= data->size_part_descs) { | |
1618 | struct part_desc_seq_scan_data *new_loc; | |
7b78fd02 JK |
1619 | unsigned int new_size = ALIGN(partnum, PART_DESC_ALLOC_STEP); |
1620 | ||
6396bb22 | 1621 | new_loc = kcalloc(new_size, sizeof(*new_loc), GFP_KERNEL); |
7b78fd02 JK |
1622 | if (!new_loc) |
1623 | return ERR_PTR(-ENOMEM); | |
1624 | memcpy(new_loc, data->part_descs_loc, | |
1625 | data->size_part_descs * sizeof(*new_loc)); | |
1626 | kfree(data->part_descs_loc); | |
1627 | data->part_descs_loc = new_loc; | |
1628 | data->size_part_descs = new_size; | |
1629 | } | |
ee4af50c | 1630 | return &(data->part_descs_loc[data->num_part_descs++].rec); |
7b78fd02 JK |
1631 | } |
1632 | ||
1633 | ||
1634 | static struct udf_vds_record *get_volume_descriptor_record(uint16_t ident, | |
1635 | struct buffer_head *bh, struct desc_seq_scan_data *data) | |
18cf4781 JK |
1636 | { |
1637 | switch (ident) { | |
1638 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ | |
7b78fd02 | 1639 | return &(data->vds[VDS_POS_PRIMARY_VOL_DESC]); |
18cf4781 | 1640 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
7b78fd02 | 1641 | return &(data->vds[VDS_POS_IMP_USE_VOL_DESC]); |
18cf4781 | 1642 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
7b78fd02 | 1643 | return &(data->vds[VDS_POS_LOGICAL_VOL_DESC]); |
18cf4781 | 1644 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
7b78fd02 JK |
1645 | return &(data->vds[VDS_POS_UNALLOC_SPACE_DESC]); |
1646 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ | |
1647 | return handle_partition_descriptor(bh, data); | |
18cf4781 JK |
1648 | } |
1649 | return NULL; | |
1650 | } | |
e7a4eb86 | 1651 | |
1da177e4 | 1652 | /* |
d759bfa4 JK |
1653 | * Process a main/reserve volume descriptor sequence. |
1654 | * @block First block of first extent of the sequence. | |
1655 | * @lastblock Lastblock of first extent of the sequence. | |
1656 | * @fileset There we store extent containing root fileset | |
1da177e4 | 1657 | * |
d759bfa4 JK |
1658 | * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor |
1659 | * sequence | |
1da177e4 | 1660 | */ |
d759bfa4 JK |
1661 | static noinline int udf_process_sequence( |
1662 | struct super_block *sb, | |
1663 | sector_t block, sector_t lastblock, | |
1664 | struct kernel_lb_addr *fileset) | |
1da177e4 LT |
1665 | { |
1666 | struct buffer_head *bh = NULL; | |
4b11111a | 1667 | struct udf_vds_record *curr; |
1da177e4 LT |
1668 | struct generic_desc *gd; |
1669 | struct volDescPtr *vdp; | |
2b8f9421 | 1670 | bool done = false; |
1da177e4 LT |
1671 | uint32_t vdsn; |
1672 | uint16_t ident; | |
d759bfa4 | 1673 | int ret; |
e7a4eb86 | 1674 | unsigned int indirections = 0; |
7b78fd02 JK |
1675 | struct desc_seq_scan_data data; |
1676 | unsigned int i; | |
1677 | ||
1678 | memset(data.vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1679 | data.size_part_descs = PART_DESC_ALLOC_STEP; | |
ee4af50c | 1680 | data.num_part_descs = 0; |
6396bb22 KC |
1681 | data.part_descs_loc = kcalloc(data.size_part_descs, |
1682 | sizeof(*data.part_descs_loc), | |
1683 | GFP_KERNEL); | |
7b78fd02 JK |
1684 | if (!data.part_descs_loc) |
1685 | return -ENOMEM; | |
1da177e4 | 1686 | |
c0eb31ed JK |
1687 | /* |
1688 | * Read the main descriptor sequence and find which descriptors | |
1689 | * are in it. | |
1690 | */ | |
cb00ea35 | 1691 | for (; (!done && block <= lastblock); block++) { |
1da177e4 | 1692 | bh = udf_read_tagged(sb, block, block, &ident); |
67621675 JK |
1693 | if (!bh) |
1694 | break; | |
1da177e4 LT |
1695 | |
1696 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1697 | gd = (struct generic_desc *)bh->b_data; | |
1698 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1699 | switch (ident) { |
28de7948 | 1700 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
7b568cba JK |
1701 | if (++indirections > UDF_MAX_TD_NESTING) { |
1702 | udf_err(sb, "too many Volume Descriptor " | |
1703 | "Pointers (max %u supported)\n", | |
1704 | UDF_MAX_TD_NESTING); | |
1705 | brelse(bh); | |
1706 | return -EIO; | |
cb00ea35 | 1707 | } |
7b568cba JK |
1708 | |
1709 | vdp = (struct volDescPtr *)bh->b_data; | |
1710 | block = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation); | |
1711 | lastblock = le32_to_cpu( | |
1712 | vdp->nextVolDescSeqExt.extLength) >> | |
1713 | sb->s_blocksize_bits; | |
1714 | lastblock += block - 1; | |
1715 | /* For loop is going to increment 'block' again */ | |
1716 | block--; | |
cb00ea35 | 1717 | break; |
18cf4781 | 1718 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
28de7948 | 1719 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
18cf4781 JK |
1720 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
1721 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ | |
7b78fd02 JK |
1722 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
1723 | curr = get_volume_descriptor_record(ident, bh, &data); | |
1724 | if (IS_ERR(curr)) { | |
1725 | brelse(bh); | |
1726 | return PTR_ERR(curr); | |
1727 | } | |
1728 | /* Descriptor we don't care about? */ | |
1729 | if (!curr) | |
1730 | break; | |
4b11111a MS |
1731 | if (vdsn >= curr->volDescSeqNum) { |
1732 | curr->volDescSeqNum = vdsn; | |
1733 | curr->block = block; | |
cb00ea35 CG |
1734 | } |
1735 | break; | |
28de7948 | 1736 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
7b568cba | 1737 | done = true; |
cb00ea35 | 1738 | break; |
1da177e4 | 1739 | } |
3bf25cb4 | 1740 | brelse(bh); |
1da177e4 | 1741 | } |
c0eb31ed JK |
1742 | /* |
1743 | * Now read interesting descriptors again and process them | |
1744 | * in a suitable order | |
1745 | */ | |
7b78fd02 | 1746 | if (!data.vds[VDS_POS_PRIMARY_VOL_DESC].block) { |
78ace70c | 1747 | udf_err(sb, "Primary Volume Descriptor not found!\n"); |
d759bfa4 JK |
1748 | return -EAGAIN; |
1749 | } | |
7b78fd02 | 1750 | ret = udf_load_pvoldesc(sb, data.vds[VDS_POS_PRIMARY_VOL_DESC].block); |
d759bfa4 JK |
1751 | if (ret < 0) |
1752 | return ret; | |
1753 | ||
7b78fd02 | 1754 | if (data.vds[VDS_POS_LOGICAL_VOL_DESC].block) { |
d759bfa4 | 1755 | ret = udf_load_logicalvol(sb, |
7b78fd02 JK |
1756 | data.vds[VDS_POS_LOGICAL_VOL_DESC].block, |
1757 | fileset); | |
d759bfa4 JK |
1758 | if (ret < 0) |
1759 | return ret; | |
c0eb31ed | 1760 | } |
165923fa | 1761 | |
7b78fd02 | 1762 | /* Now handle prevailing Partition Descriptors */ |
ee4af50c JK |
1763 | for (i = 0; i < data.num_part_descs; i++) { |
1764 | ret = udf_load_partdesc(sb, data.part_descs_loc[i].rec.block); | |
1765 | if (ret < 0) | |
1766 | return ret; | |
1da177e4 LT |
1767 | } |
1768 | ||
1769 | return 0; | |
1770 | } | |
1771 | ||
d759bfa4 JK |
1772 | /* |
1773 | * Load Volume Descriptor Sequence described by anchor in bh | |
1774 | * | |
1775 | * Returns <0 on error, 0 on success | |
1776 | */ | |
40346005 JK |
1777 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, |
1778 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1779 | { |
40346005 | 1780 | struct anchorVolDescPtr *anchor; |
d759bfa4 JK |
1781 | sector_t main_s, main_e, reserve_s, reserve_e; |
1782 | int ret; | |
1da177e4 | 1783 | |
40346005 JK |
1784 | anchor = (struct anchorVolDescPtr *)bh->b_data; |
1785 | ||
1786 | /* Locate the main sequence */ | |
1787 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1788 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1789 | main_e = main_e >> sb->s_blocksize_bits; | |
91c9c9ec | 1790 | main_e += main_s - 1; |
40346005 JK |
1791 | |
1792 | /* Locate the reserve sequence */ | |
1793 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); | |
1794 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); | |
1795 | reserve_e = reserve_e >> sb->s_blocksize_bits; | |
91c9c9ec | 1796 | reserve_e += reserve_s - 1; |
40346005 JK |
1797 | |
1798 | /* Process the main & reserve sequences */ | |
1799 | /* responsible for finding the PartitionDesc(s) */ | |
d759bfa4 JK |
1800 | ret = udf_process_sequence(sb, main_s, main_e, fileset); |
1801 | if (ret != -EAGAIN) | |
1802 | return ret; | |
bff943af | 1803 | udf_sb_free_partitions(sb); |
d759bfa4 JK |
1804 | ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset); |
1805 | if (ret < 0) { | |
1806 | udf_sb_free_partitions(sb); | |
1807 | /* No sequence was OK, return -EIO */ | |
1808 | if (ret == -EAGAIN) | |
1809 | ret = -EIO; | |
1810 | } | |
1811 | return ret; | |
1da177e4 LT |
1812 | } |
1813 | ||
40346005 JK |
1814 | /* |
1815 | * Check whether there is an anchor block in the given block and | |
1816 | * load Volume Descriptor Sequence if so. | |
d759bfa4 JK |
1817 | * |
1818 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor | |
1819 | * block | |
40346005 JK |
1820 | */ |
1821 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, | |
1822 | struct kernel_lb_addr *fileset) | |
1197e4df | 1823 | { |
40346005 JK |
1824 | struct buffer_head *bh; |
1825 | uint16_t ident; | |
1826 | int ret; | |
1197e4df | 1827 | |
40346005 JK |
1828 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
1829 | udf_fixed_to_variable(block) >= | |
23bcda11 | 1830 | i_size_read(sb->s_bdev->bd_inode) >> sb->s_blocksize_bits) |
d759bfa4 | 1831 | return -EAGAIN; |
40346005 JK |
1832 | |
1833 | bh = udf_read_tagged(sb, block, block, &ident); | |
1834 | if (!bh) | |
d759bfa4 | 1835 | return -EAGAIN; |
40346005 JK |
1836 | if (ident != TAG_IDENT_AVDP) { |
1837 | brelse(bh); | |
d759bfa4 | 1838 | return -EAGAIN; |
1197e4df | 1839 | } |
40346005 JK |
1840 | ret = udf_load_sequence(sb, bh, fileset); |
1841 | brelse(bh); | |
1842 | return ret; | |
1197e4df CL |
1843 | } |
1844 | ||
d759bfa4 JK |
1845 | /* |
1846 | * Search for an anchor volume descriptor pointer. | |
1847 | * | |
1848 | * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set | |
1849 | * of anchors. | |
1850 | */ | |
1851 | static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock, | |
1852 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1853 | { |
40346005 | 1854 | sector_t last[6]; |
38b74a53 | 1855 | int i; |
40346005 JK |
1856 | struct udf_sb_info *sbi = UDF_SB(sb); |
1857 | int last_count = 0; | |
d759bfa4 | 1858 | int ret; |
1da177e4 | 1859 | |
40346005 JK |
1860 | /* First try user provided anchor */ |
1861 | if (sbi->s_anchor) { | |
d759bfa4 JK |
1862 | ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset); |
1863 | if (ret != -EAGAIN) | |
1864 | return ret; | |
40346005 JK |
1865 | } |
1866 | /* | |
1867 | * according to spec, anchor is in either: | |
1868 | * block 256 | |
1869 | * lastblock-256 | |
1870 | * lastblock | |
1871 | * however, if the disc isn't closed, it could be 512. | |
1872 | */ | |
d759bfa4 JK |
1873 | ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset); |
1874 | if (ret != -EAGAIN) | |
1875 | return ret; | |
40346005 JK |
1876 | /* |
1877 | * The trouble is which block is the last one. Drives often misreport | |
1878 | * this so we try various possibilities. | |
1879 | */ | |
d759bfa4 JK |
1880 | last[last_count++] = *lastblock; |
1881 | if (*lastblock >= 1) | |
1882 | last[last_count++] = *lastblock - 1; | |
1883 | last[last_count++] = *lastblock + 1; | |
1884 | if (*lastblock >= 2) | |
1885 | last[last_count++] = *lastblock - 2; | |
1886 | if (*lastblock >= 150) | |
1887 | last[last_count++] = *lastblock - 150; | |
1888 | if (*lastblock >= 152) | |
1889 | last[last_count++] = *lastblock - 152; | |
1da177e4 | 1890 | |
40346005 | 1891 | for (i = 0; i < last_count; i++) { |
23bcda11 | 1892 | if (last[i] >= i_size_read(sb->s_bdev->bd_inode) >> |
40346005 | 1893 | sb->s_blocksize_bits) |
28f7c4d4 | 1894 | continue; |
d759bfa4 JK |
1895 | ret = udf_check_anchor_block(sb, last[i], fileset); |
1896 | if (ret != -EAGAIN) { | |
1897 | if (!ret) | |
1898 | *lastblock = last[i]; | |
1899 | return ret; | |
1900 | } | |
40346005 | 1901 | if (last[i] < 256) |
28f7c4d4 | 1902 | continue; |
d759bfa4 JK |
1903 | ret = udf_check_anchor_block(sb, last[i] - 256, fileset); |
1904 | if (ret != -EAGAIN) { | |
1905 | if (!ret) | |
1906 | *lastblock = last[i]; | |
1907 | return ret; | |
1908 | } | |
40346005 | 1909 | } |
28f7c4d4 | 1910 | |
40346005 | 1911 | /* Finally try block 512 in case media is open */ |
d759bfa4 | 1912 | return udf_check_anchor_block(sb, sbi->s_session + 512, fileset); |
40346005 | 1913 | } |
28f7c4d4 | 1914 | |
40346005 JK |
1915 | /* |
1916 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from | |
1917 | * area specified by it. The function expects sbi->s_lastblock to be the last | |
1918 | * block on the media. | |
1919 | * | |
d759bfa4 JK |
1920 | * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor |
1921 | * was not found. | |
40346005 JK |
1922 | */ |
1923 | static int udf_find_anchor(struct super_block *sb, | |
1924 | struct kernel_lb_addr *fileset) | |
1925 | { | |
40346005 | 1926 | struct udf_sb_info *sbi = UDF_SB(sb); |
d759bfa4 JK |
1927 | sector_t lastblock = sbi->s_last_block; |
1928 | int ret; | |
28f7c4d4 | 1929 | |
d759bfa4 JK |
1930 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1931 | if (ret != -EAGAIN) | |
40346005 | 1932 | goto out; |
1da177e4 | 1933 | |
40346005 JK |
1934 | /* No anchor found? Try VARCONV conversion of block numbers */ |
1935 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
d759bfa4 | 1936 | lastblock = udf_variable_to_fixed(sbi->s_last_block); |
40346005 | 1937 | /* Firstly, we try to not convert number of the last block */ |
d759bfa4 JK |
1938 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1939 | if (ret != -EAGAIN) | |
40346005 | 1940 | goto out; |
1da177e4 | 1941 | |
d759bfa4 | 1942 | lastblock = sbi->s_last_block; |
40346005 | 1943 | /* Secondly, we try with converted number of the last block */ |
d759bfa4 JK |
1944 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1945 | if (ret < 0) { | |
40346005 JK |
1946 | /* VARCONV didn't help. Clear it. */ |
1947 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); | |
1da177e4 | 1948 | } |
40346005 | 1949 | out: |
d759bfa4 JK |
1950 | if (ret == 0) |
1951 | sbi->s_last_block = lastblock; | |
1952 | return ret; | |
40346005 | 1953 | } |
1da177e4 | 1954 | |
40346005 JK |
1955 | /* |
1956 | * Check Volume Structure Descriptor, find Anchor block and load Volume | |
d759bfa4 JK |
1957 | * Descriptor Sequence. |
1958 | * | |
1959 | * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor | |
1960 | * block was not found. | |
40346005 JK |
1961 | */ |
1962 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, | |
1963 | int silent, struct kernel_lb_addr *fileset) | |
1964 | { | |
1965 | struct udf_sb_info *sbi = UDF_SB(sb); | |
ba54aef0 | 1966 | int nsr = 0; |
d759bfa4 | 1967 | int ret; |
40346005 JK |
1968 | |
1969 | if (!sb_set_blocksize(sb, uopt->blocksize)) { | |
1970 | if (!silent) | |
78ace70c | 1971 | udf_warn(sb, "Bad block size\n"); |
d759bfa4 | 1972 | return -EINVAL; |
40346005 JK |
1973 | } |
1974 | sbi->s_last_block = uopt->lastblock; | |
1975 | if (!uopt->novrs) { | |
1976 | /* Check that it is NSR02 compliant */ | |
ba54aef0 SM |
1977 | nsr = udf_check_vsd(sb); |
1978 | if (!nsr) { | |
40346005 | 1979 | if (!silent) |
78ace70c | 1980 | udf_warn(sb, "No VRS found\n"); |
70f16cef | 1981 | return -EINVAL; |
40346005 | 1982 | } |
ba54aef0 | 1983 | if (nsr == -1) |
44499602 PF |
1984 | udf_debug("Failed to read sector at offset %d. " |
1985 | "Assuming open disc. Skipping validity " | |
1986 | "check\n", VSD_FIRST_SECTOR_OFFSET); | |
40346005 JK |
1987 | if (!sbi->s_last_block) |
1988 | sbi->s_last_block = udf_get_last_block(sb); | |
1989 | } else { | |
1990 | udf_debug("Validity check skipped because of novrs option\n"); | |
28f7c4d4 | 1991 | } |
1da177e4 | 1992 | |
40346005 JK |
1993 | /* Look for anchor block and load Volume Descriptor Sequence */ |
1994 | sbi->s_anchor = uopt->anchor; | |
d759bfa4 JK |
1995 | ret = udf_find_anchor(sb, fileset); |
1996 | if (ret < 0) { | |
1997 | if (!silent && ret == -EAGAIN) | |
78ace70c | 1998 | udf_warn(sb, "No anchor found\n"); |
d759bfa4 | 1999 | return ret; |
40346005 | 2000 | } |
d759bfa4 | 2001 | return 0; |
1da177e4 LT |
2002 | } |
2003 | ||
ebbd5e99 SM |
2004 | static void udf_finalize_lvid(struct logicalVolIntegrityDesc *lvid) |
2005 | { | |
2006 | struct timespec64 ts; | |
2007 | ||
2008 | ktime_get_real_ts64(&ts); | |
2009 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts); | |
2010 | lvid->descTag.descCRC = cpu_to_le16( | |
2011 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), | |
2012 | le16_to_cpu(lvid->descTag.descCRCLength))); | |
2013 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
2014 | } | |
2015 | ||
1da177e4 LT |
2016 | static void udf_open_lvid(struct super_block *sb) |
2017 | { | |
6c79e987 MS |
2018 | struct udf_sb_info *sbi = UDF_SB(sb); |
2019 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
2020 | struct logicalVolIntegrityDesc *lvid; |
2021 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
146bca72 | 2022 | |
165923fa MS |
2023 | if (!bh) |
2024 | return; | |
165923fa | 2025 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
69d75671 JK |
2026 | lvidiu = udf_sb_lvidiu(sb); |
2027 | if (!lvidiu) | |
2028 | return; | |
165923fa | 2029 | |
69d75671 | 2030 | mutex_lock(&sbi->s_alloc_mutex); |
165923fa MS |
2031 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
2032 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
b72e632c JK |
2033 | if (le32_to_cpu(lvid->integrityType) == LVID_INTEGRITY_TYPE_CLOSE) |
2034 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); | |
2035 | else | |
2036 | UDF_SET_FLAG(sb, UDF_FLAG_INCONSISTENT); | |
165923fa | 2037 | |
ebbd5e99 | 2038 | udf_finalize_lvid(lvid); |
165923fa | 2039 | mark_buffer_dirty(bh); |
146bca72 | 2040 | sbi->s_lvid_dirty = 0; |
949f4a7c | 2041 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
2042 | /* Make opening of filesystem visible on the media immediately */ |
2043 | sync_dirty_buffer(bh); | |
1da177e4 LT |
2044 | } |
2045 | ||
2046 | static void udf_close_lvid(struct super_block *sb) | |
2047 | { | |
6c79e987 MS |
2048 | struct udf_sb_info *sbi = UDF_SB(sb); |
2049 | struct buffer_head *bh = sbi->s_lvid_bh; | |
2050 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 2051 | struct logicalVolIntegrityDescImpUse *lvidiu; |
28de7948 | 2052 | |
6c79e987 MS |
2053 | if (!bh) |
2054 | return; | |
69d75671 JK |
2055 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
2056 | lvidiu = udf_sb_lvidiu(sb); | |
2057 | if (!lvidiu) | |
2058 | return; | |
6c79e987 | 2059 | |
949f4a7c | 2060 | mutex_lock(&sbi->s_alloc_mutex); |
165923fa MS |
2061 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
2062 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
165923fa MS |
2063 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) |
2064 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
2065 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
2066 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
2067 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
2068 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
b72e632c JK |
2069 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_INCONSISTENT)) |
2070 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
165923fa | 2071 | |
853a0c25 JK |
2072 | /* |
2073 | * We set buffer uptodate unconditionally here to avoid spurious | |
2074 | * warnings from mark_buffer_dirty() when previous EIO has marked | |
2075 | * the buffer as !uptodate | |
2076 | */ | |
2077 | set_buffer_uptodate(bh); | |
ebbd5e99 | 2078 | udf_finalize_lvid(lvid); |
165923fa | 2079 | mark_buffer_dirty(bh); |
146bca72 | 2080 | sbi->s_lvid_dirty = 0; |
949f4a7c | 2081 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
2082 | /* Make closing of filesystem visible on the media immediately */ |
2083 | sync_dirty_buffer(bh); | |
1da177e4 LT |
2084 | } |
2085 | ||
d664b6af JK |
2086 | u64 lvid_get_unique_id(struct super_block *sb) |
2087 | { | |
2088 | struct buffer_head *bh; | |
2089 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2090 | struct logicalVolIntegrityDesc *lvid; | |
2091 | struct logicalVolHeaderDesc *lvhd; | |
2092 | u64 uniqueID; | |
2093 | u64 ret; | |
2094 | ||
2095 | bh = sbi->s_lvid_bh; | |
2096 | if (!bh) | |
2097 | return 0; | |
2098 | ||
2099 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
2100 | lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; | |
2101 | ||
2102 | mutex_lock(&sbi->s_alloc_mutex); | |
2103 | ret = uniqueID = le64_to_cpu(lvhd->uniqueID); | |
2104 | if (!(++uniqueID & 0xFFFFFFFF)) | |
2105 | uniqueID += 16; | |
2106 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
e8b42747 | 2107 | udf_updated_lvid(sb); |
d664b6af | 2108 | mutex_unlock(&sbi->s_alloc_mutex); |
d664b6af JK |
2109 | |
2110 | return ret; | |
1da177e4 LT |
2111 | } |
2112 | ||
1da177e4 LT |
2113 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
2114 | { | |
d759bfa4 | 2115 | int ret = -EINVAL; |
cb00ea35 | 2116 | struct inode *inode = NULL; |
1da177e4 | 2117 | struct udf_options uopt; |
5ca4e4be | 2118 | struct kernel_lb_addr rootdir, fileset; |
1da177e4 | 2119 | struct udf_sb_info *sbi; |
9181f8bf | 2120 | bool lvid_open = false; |
1da177e4 LT |
2121 | |
2122 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
116e5258 JK |
2123 | /* By default we'll use overflow[ug]id when UDF inode [ug]id == -1 */ |
2124 | uopt.uid = make_kuid(current_user_ns(), overflowuid); | |
2125 | uopt.gid = make_kgid(current_user_ns(), overflowgid); | |
1da177e4 | 2126 | uopt.umask = 0; |
87bc730c MS |
2127 | uopt.fmode = UDF_INVALID_MODE; |
2128 | uopt.dmode = UDF_INVALID_MODE; | |
785dffe1 | 2129 | uopt.nls_map = NULL; |
1da177e4 | 2130 | |
033c9da0 | 2131 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
9db9f9e3 | 2132 | if (!sbi) |
1da177e4 | 2133 | return -ENOMEM; |
28de7948 | 2134 | |
1da177e4 | 2135 | sb->s_fs_info = sbi; |
1da177e4 | 2136 | |
1e7933de | 2137 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 2138 | |
6da80894 | 2139 | if (!udf_parse_options((char *)options, &uopt, false)) |
fdf2657b | 2140 | goto parse_options_failure; |
1da177e4 LT |
2141 | |
2142 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 2143 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
8076c363 | 2144 | udf_err(sb, "utf8 cannot be combined with iocharset\n"); |
fdf2657b | 2145 | goto parse_options_failure; |
1da177e4 | 2146 | } |
cb00ea35 | 2147 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
2148 | uopt.nls_map = load_nls_default(); |
2149 | if (!uopt.nls_map) | |
2150 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
2151 | else | |
2152 | udf_debug("Using default NLS map\n"); | |
2153 | } | |
1da177e4 LT |
2154 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) |
2155 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
2156 | ||
2157 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
2158 | fileset.partitionReferenceNum = 0xFFFF; | |
2159 | ||
6c79e987 MS |
2160 | sbi->s_flags = uopt.flags; |
2161 | sbi->s_uid = uopt.uid; | |
2162 | sbi->s_gid = uopt.gid; | |
2163 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
2164 | sbi->s_fmode = uopt.fmode; |
2165 | sbi->s_dmode = uopt.dmode; | |
6c79e987 | 2166 | sbi->s_nls_map = uopt.nls_map; |
c03cad24 | 2167 | rwlock_init(&sbi->s_cred_lock); |
1da177e4 | 2168 | |
cb00ea35 | 2169 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 2170 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 2171 | else |
6c79e987 | 2172 | sbi->s_session = uopt.session; |
1da177e4 | 2173 | |
6c79e987 | 2174 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 2175 | |
40346005 JK |
2176 | /* Fill in the rest of the superblock */ |
2177 | sb->s_op = &udf_sb_ops; | |
2178 | sb->s_export_op = &udf_export_ops; | |
123e9caf | 2179 | |
40346005 JK |
2180 | sb->s_magic = UDF_SUPER_MAGIC; |
2181 | sb->s_time_gran = 1000; | |
2182 | ||
1197e4df | 2183 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { |
40346005 | 2184 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 2185 | } else { |
e1defc4f | 2186 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); |
70f16cef | 2187 | while (uopt.blocksize <= 4096) { |
40346005 | 2188 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
70f16cef FF |
2189 | if (ret < 0) { |
2190 | if (!silent && ret != -EACCES) { | |
fcbf7637 | 2191 | pr_notice("Scanning with blocksize %u failed\n", |
70f16cef FF |
2192 | uopt.blocksize); |
2193 | } | |
2194 | brelse(sbi->s_lvid_bh); | |
2195 | sbi->s_lvid_bh = NULL; | |
2196 | /* | |
2197 | * EACCES is special - we want to propagate to | |
2198 | * upper layers that we cannot handle RW mount. | |
2199 | */ | |
2200 | if (ret == -EACCES) | |
2201 | break; | |
2202 | } else | |
2203 | break; | |
2204 | ||
2205 | uopt.blocksize <<= 1; | |
1197e4df | 2206 | } |
1da177e4 | 2207 | } |
d759bfa4 JK |
2208 | if (ret < 0) { |
2209 | if (ret == -EAGAIN) { | |
2210 | udf_warn(sb, "No partition found (1)\n"); | |
2211 | ret = -EINVAL; | |
2212 | } | |
1da177e4 LT |
2213 | goto error_out; |
2214 | } | |
2215 | ||
fcbf7637 | 2216 | udf_debug("Lastblock=%u\n", sbi->s_last_block); |
1da177e4 | 2217 | |
6c79e987 | 2218 | if (sbi->s_lvid_bh) { |
4b11111a | 2219 | struct logicalVolIntegrityDescImpUse *lvidiu = |
69d75671 JK |
2220 | udf_sb_lvidiu(sb); |
2221 | uint16_t minUDFReadRev; | |
2222 | uint16_t minUDFWriteRev; | |
1da177e4 | 2223 | |
69d75671 JK |
2224 | if (!lvidiu) { |
2225 | ret = -EINVAL; | |
2226 | goto error_out; | |
2227 | } | |
2228 | minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); | |
2229 | minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
cb00ea35 | 2230 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
78ace70c | 2231 | udf_err(sb, "minUDFReadRev=%x (max is %x)\n", |
69d75671 | 2232 | minUDFReadRev, |
78ace70c | 2233 | UDF_MAX_READ_VERSION); |
d759bfa4 | 2234 | ret = -EINVAL; |
1da177e4 | 2235 | goto error_out; |
a9ad01bc JK |
2236 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) { |
2237 | if (!sb_rdonly(sb)) { | |
2238 | ret = -EACCES; | |
2239 | goto error_out; | |
2240 | } | |
2241 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); | |
e729eac6 | 2242 | } |
1da177e4 | 2243 | |
6c79e987 | 2244 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
2245 | |
2246 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
2247 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
2248 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
2249 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
2250 | } | |
2251 | ||
6c79e987 | 2252 | if (!sbi->s_partitions) { |
78ace70c | 2253 | udf_warn(sb, "No partition found (2)\n"); |
d759bfa4 | 2254 | ret = -EINVAL; |
1da177e4 LT |
2255 | goto error_out; |
2256 | } | |
2257 | ||
4b11111a | 2258 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
a9ad01bc JK |
2259 | UDF_PART_FLAG_READ_ONLY) { |
2260 | if (!sb_rdonly(sb)) { | |
2261 | ret = -EACCES; | |
2262 | goto error_out; | |
2263 | } | |
2264 | UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT); | |
c1a26e7d | 2265 | } |
39b3f6d6 | 2266 | |
2dee5aac JK |
2267 | ret = udf_find_fileset(sb, &fileset, &rootdir); |
2268 | if (ret < 0) { | |
78ace70c | 2269 | udf_warn(sb, "No fileset found\n"); |
1da177e4 LT |
2270 | goto error_out; |
2271 | } | |
2272 | ||
cb00ea35 | 2273 | if (!silent) { |
5ca4e4be | 2274 | struct timestamp ts; |
56774805 | 2275 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); |
78ace70c JP |
2276 | udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
2277 | sbi->s_volume_ident, | |
2278 | le16_to_cpu(ts.year), ts.month, ts.day, | |
56774805 | 2279 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); |
1da177e4 | 2280 | } |
bc98a42c | 2281 | if (!sb_rdonly(sb)) { |
1da177e4 | 2282 | udf_open_lvid(sb); |
9181f8bf JK |
2283 | lvid_open = true; |
2284 | } | |
1da177e4 LT |
2285 | |
2286 | /* Assign the root inode */ | |
2287 | /* assign inodes by physical block number */ | |
2288 | /* perhaps it's not extensible enough, but for now ... */ | |
97e961fd | 2289 | inode = udf_iget(sb, &rootdir); |
6d3d5e86 | 2290 | if (IS_ERR(inode)) { |
fcbf7637 | 2291 | udf_err(sb, "Error in udf_iget, block=%u, partition=%u\n", |
cb00ea35 | 2292 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
6d3d5e86 | 2293 | ret = PTR_ERR(inode); |
1da177e4 LT |
2294 | goto error_out; |
2295 | } | |
2296 | ||
2297 | /* Allocate a dentry for the root inode */ | |
48fde701 | 2298 | sb->s_root = d_make_root(inode); |
cb00ea35 | 2299 | if (!sb->s_root) { |
78ace70c | 2300 | udf_err(sb, "Couldn't allocate root dentry\n"); |
d759bfa4 | 2301 | ret = -ENOMEM; |
1da177e4 LT |
2302 | goto error_out; |
2303 | } | |
31170b6a | 2304 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
8de52778 | 2305 | sb->s_max_links = UDF_MAX_LINKS; |
1da177e4 LT |
2306 | return 0; |
2307 | ||
28de7948 | 2308 | error_out: |
0d454e4a | 2309 | iput(sbi->s_vat_inode); |
fdf2657b | 2310 | parse_options_failure: |
785dffe1 CX |
2311 | if (uopt.nls_map) |
2312 | unload_nls(uopt.nls_map); | |
9181f8bf | 2313 | if (lvid_open) |
1da177e4 | 2314 | udf_close_lvid(sb); |
6c79e987 | 2315 | brelse(sbi->s_lvid_bh); |
bff943af | 2316 | udf_sb_free_partitions(sb); |
1da177e4 LT |
2317 | kfree(sbi); |
2318 | sb->s_fs_info = NULL; | |
28de7948 | 2319 | |
d759bfa4 | 2320 | return ret; |
1da177e4 LT |
2321 | } |
2322 | ||
8076c363 JP |
2323 | void _udf_err(struct super_block *sb, const char *function, |
2324 | const char *fmt, ...) | |
1da177e4 | 2325 | { |
c2bff36c | 2326 | struct va_format vaf; |
1da177e4 LT |
2327 | va_list args; |
2328 | ||
1da177e4 | 2329 | va_start(args, fmt); |
c2bff36c JP |
2330 | |
2331 | vaf.fmt = fmt; | |
2332 | vaf.va = &args; | |
2333 | ||
2334 | pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2335 | ||
1da177e4 | 2336 | va_end(args); |
1da177e4 LT |
2337 | } |
2338 | ||
a40ecd7b JP |
2339 | void _udf_warn(struct super_block *sb, const char *function, |
2340 | const char *fmt, ...) | |
1da177e4 | 2341 | { |
c2bff36c | 2342 | struct va_format vaf; |
1da177e4 LT |
2343 | va_list args; |
2344 | ||
cb00ea35 | 2345 | va_start(args, fmt); |
c2bff36c JP |
2346 | |
2347 | vaf.fmt = fmt; | |
2348 | vaf.va = &args; | |
2349 | ||
2350 | pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2351 | ||
1da177e4 | 2352 | va_end(args); |
1da177e4 LT |
2353 | } |
2354 | ||
cb00ea35 | 2355 | static void udf_put_super(struct super_block *sb) |
1da177e4 | 2356 | { |
6c79e987 | 2357 | struct udf_sb_info *sbi; |
1da177e4 | 2358 | |
6c79e987 | 2359 | sbi = UDF_SB(sb); |
6cfd0148 | 2360 | |
0d454e4a | 2361 | iput(sbi->s_vat_inode); |
1da177e4 | 2362 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) |
6c79e987 | 2363 | unload_nls(sbi->s_nls_map); |
bc98a42c | 2364 | if (!sb_rdonly(sb)) |
1da177e4 | 2365 | udf_close_lvid(sb); |
6c79e987 | 2366 | brelse(sbi->s_lvid_bh); |
bff943af | 2367 | udf_sb_free_partitions(sb); |
bbe48dd8 | 2368 | mutex_destroy(&sbi->s_alloc_mutex); |
1da177e4 LT |
2369 | kfree(sb->s_fs_info); |
2370 | sb->s_fs_info = NULL; | |
2371 | } | |
2372 | ||
146bca72 JK |
2373 | static int udf_sync_fs(struct super_block *sb, int wait) |
2374 | { | |
2375 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2376 | ||
2377 | mutex_lock(&sbi->s_alloc_mutex); | |
2378 | if (sbi->s_lvid_dirty) { | |
e8b42747 | 2379 | struct buffer_head *bh = sbi->s_lvid_bh; |
52b9666e | 2380 | struct logicalVolIntegrityDesc *lvid; |
e8b42747 | 2381 | |
52b9666e JK |
2382 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
2383 | udf_finalize_lvid(lvid); | |
e8b42747 | 2384 | |
146bca72 JK |
2385 | /* |
2386 | * Blockdevice will be synced later so we don't have to submit | |
2387 | * the buffer for IO | |
2388 | */ | |
e8b42747 | 2389 | mark_buffer_dirty(bh); |
146bca72 JK |
2390 | sbi->s_lvid_dirty = 0; |
2391 | } | |
2392 | mutex_unlock(&sbi->s_alloc_mutex); | |
2393 | ||
2394 | return 0; | |
2395 | } | |
2396 | ||
cb00ea35 | 2397 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2398 | { |
726c3342 | 2399 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
2400 | struct udf_sb_info *sbi = UDF_SB(sb); |
2401 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
557f5a14 | 2402 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
6c79e987 | 2403 | |
69d75671 | 2404 | lvidiu = udf_sb_lvidiu(sb); |
1da177e4 LT |
2405 | buf->f_type = UDF_SUPER_MAGIC; |
2406 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 2407 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
2408 | buf->f_bfree = udf_count_free(sb); |
2409 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
2410 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
2411 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
2412 | + buf->f_bfree; | |
1da177e4 | 2413 | buf->f_ffree = buf->f_bfree; |
9fba7056 | 2414 | buf->f_namelen = UDF_NAME_LEN; |
557f5a14 CL |
2415 | buf->f_fsid.val[0] = (u32)id; |
2416 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
2417 | |
2418 | return 0; | |
2419 | } | |
2420 | ||
4b11111a MS |
2421 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
2422 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
2423 | { |
2424 | struct buffer_head *bh = NULL; | |
2425 | unsigned int accum = 0; | |
2426 | int index; | |
b490bdd6 | 2427 | udf_pblk_t block = 0, newblock; |
5ca4e4be | 2428 | struct kernel_lb_addr loc; |
1da177e4 | 2429 | uint32_t bytes; |
1da177e4 LT |
2430 | uint8_t *ptr; |
2431 | uint16_t ident; | |
2432 | struct spaceBitmapDesc *bm; | |
2433 | ||
1da177e4 | 2434 | loc.logicalBlockNum = bitmap->s_extPosition; |
6c79e987 | 2435 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
97e961fd | 2436 | bh = udf_read_ptagged(sb, &loc, 0, &ident); |
1da177e4 | 2437 | |
cb00ea35 | 2438 | if (!bh) { |
78ace70c | 2439 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 | 2440 | goto out; |
cb00ea35 | 2441 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 2442 | brelse(bh); |
78ace70c | 2443 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 LT |
2444 | goto out; |
2445 | } | |
2446 | ||
2447 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2448 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
2449 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
2450 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 2451 | |
cb00ea35 | 2452 | while (bytes > 0) { |
01b954a3 MS |
2453 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
2454 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2455 | cur_bytes * 8); | |
2456 | bytes -= cur_bytes; | |
cb00ea35 | 2457 | if (bytes) { |
3bf25cb4 | 2458 | brelse(bh); |
97e961fd | 2459 | newblock = udf_get_lb_pblock(sb, &loc, ++block); |
1da177e4 | 2460 | bh = udf_tread(sb, newblock); |
cb00ea35 | 2461 | if (!bh) { |
1da177e4 LT |
2462 | udf_debug("read failed\n"); |
2463 | goto out; | |
2464 | } | |
2465 | index = 0; | |
28de7948 | 2466 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2467 | } |
2468 | } | |
3bf25cb4 | 2469 | brelse(bh); |
28de7948 | 2470 | out: |
1da177e4 LT |
2471 | return accum; |
2472 | } | |
2473 | ||
4b11111a MS |
2474 | static unsigned int udf_count_free_table(struct super_block *sb, |
2475 | struct inode *table) | |
1da177e4 LT |
2476 | { |
2477 | unsigned int accum = 0; | |
ff116fc8 | 2478 | uint32_t elen; |
5ca4e4be | 2479 | struct kernel_lb_addr eloc; |
1da177e4 | 2480 | int8_t etype; |
ff116fc8 | 2481 | struct extent_position epos; |
1da177e4 | 2482 | |
d1668fe3 | 2483 | mutex_lock(&UDF_SB(sb)->s_alloc_mutex); |
c0b34438 | 2484 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2485 | epos.offset = sizeof(struct unallocSpaceEntry); |
2486 | epos.bh = NULL; | |
1da177e4 | 2487 | |
3a71fc5d | 2488 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2489 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2490 | |
3bf25cb4 | 2491 | brelse(epos.bh); |
d1668fe3 | 2492 | mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); |
1da177e4 LT |
2493 | |
2494 | return accum; | |
2495 | } | |
cb00ea35 CG |
2496 | |
2497 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2498 | { |
2499 | unsigned int accum = 0; | |
6c79e987 MS |
2500 | struct udf_sb_info *sbi; |
2501 | struct udf_part_map *map; | |
1da177e4 | 2502 | |
6c79e987 MS |
2503 | sbi = UDF_SB(sb); |
2504 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2505 | struct logicalVolIntegrityDesc *lvid = |
2506 | (struct logicalVolIntegrityDesc *) | |
2507 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2508 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2509 | accum = le32_to_cpu( |
2510 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2511 | if (accum == 0xFFFFFFFF) |
2512 | accum = 0; | |
2513 | } | |
2514 | } | |
2515 | ||
2516 | if (accum) | |
2517 | return accum; | |
2518 | ||
6c79e987 MS |
2519 | map = &sbi->s_partmaps[sbi->s_partition]; |
2520 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2521 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2522 | map->s_uspace.s_bitmap); |
1da177e4 | 2523 | } |
1da177e4 LT |
2524 | if (accum) |
2525 | return accum; | |
2526 | ||
6c79e987 | 2527 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2528 | accum += udf_count_free_table(sb, |
6c79e987 | 2529 | map->s_uspace.s_table); |
1da177e4 | 2530 | } |
1da177e4 LT |
2531 | return accum; |
2532 | } | |
54bb60d5 FF |
2533 | |
2534 | MODULE_AUTHOR("Ben Fennema"); | |
2535 | MODULE_DESCRIPTION("Universal Disk Format Filesystem"); | |
2536 | MODULE_LICENSE("GPL"); | |
2537 | module_init(init_udf_fs) | |
2538 | module_exit(exit_udf_fs) |