Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * super.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Super block routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
7 | * DESCRIPTION | |
8 | * OSTA-UDF(tm) = Optical Storage Technology Association | |
9 | * Universal Disk Format. | |
10 | * | |
11 | * This code is based on version 2.00 of the UDF specification, | |
12 | * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346]. | |
13 | * http://www.osta.org/ | |
14 | * http://www.ecma.ch/ | |
15 | * http://www.iso.org/ | |
16 | * | |
1da177e4 LT |
17 | * COPYRIGHT |
18 | * This file is distributed under the terms of the GNU General Public | |
19 | * License (GPL). Copies of the GPL can be obtained from: | |
20 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
21 | * Each contributing author retains all rights to their own work. | |
22 | * | |
23 | * (C) 1998 Dave Boynton | |
24 | * (C) 1998-2004 Ben Fennema | |
25 | * (C) 2000 Stelias Computing Inc | |
26 | * | |
27 | * HISTORY | |
28 | * | |
29 | * 09/24/98 dgb changed to allow compiling outside of kernel, and | |
30 | * added some debugging. | |
31 | * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34 | |
32 | * 10/16/98 attempting some multi-session support | |
33 | * 10/17/98 added freespace count for "df" | |
34 | * 11/11/98 gr added novrs option | |
35 | * 11/26/98 dgb added fileset,anchor mount options | |
3a71fc5d MS |
36 | * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced |
37 | * vol descs. rewrote option handling based on isofs | |
1da177e4 LT |
38 | * 12/20/98 find the free space bitmap (if it exists) |
39 | */ | |
40 | ||
cb00ea35 | 41 | #include "udfdecl.h" |
1da177e4 | 42 | |
1da177e4 LT |
43 | #include <linux/blkdev.h> |
44 | #include <linux/slab.h> | |
45 | #include <linux/kernel.h> | |
46 | #include <linux/module.h> | |
47 | #include <linux/parser.h> | |
48 | #include <linux/stat.h> | |
49 | #include <linux/cdrom.h> | |
50 | #include <linux/nls.h> | |
1da177e4 LT |
51 | #include <linux/buffer_head.h> |
52 | #include <linux/vfs.h> | |
53 | #include <linux/vmalloc.h> | |
dc5d39be | 54 | #include <linux/errno.h> |
6da80894 MS |
55 | #include <linux/mount.h> |
56 | #include <linux/seq_file.h> | |
01b954a3 | 57 | #include <linux/bitmap.h> |
f845fced | 58 | #include <linux/crc-itu-t.h> |
1df2ae31 | 59 | #include <linux/log2.h> |
1da177e4 LT |
60 | #include <asm/byteorder.h> |
61 | ||
1da177e4 LT |
62 | #include "udf_sb.h" |
63 | #include "udf_i.h" | |
64 | ||
65 | #include <linux/init.h> | |
e973606c | 66 | #include <linux/uaccess.h> |
1da177e4 LT |
67 | |
68 | #define VDS_POS_PRIMARY_VOL_DESC 0 | |
69 | #define VDS_POS_UNALLOC_SPACE_DESC 1 | |
70 | #define VDS_POS_LOGICAL_VOL_DESC 2 | |
71 | #define VDS_POS_PARTITION_DESC 3 | |
72 | #define VDS_POS_IMP_USE_VOL_DESC 4 | |
73 | #define VDS_POS_VOL_DESC_PTR 5 | |
74 | #define VDS_POS_TERMINATING_DESC 6 | |
75 | #define VDS_POS_LENGTH 7 | |
76 | ||
6da80894 MS |
77 | #define UDF_DEFAULT_BLOCKSIZE 2048 |
78 | ||
44499602 PF |
79 | #define VSD_FIRST_SECTOR_OFFSET 32768 |
80 | #define VSD_MAX_SECTOR_OFFSET 0x800000 | |
81 | ||
8de52778 AV |
82 | enum { UDF_MAX_LINKS = 0xffff }; |
83 | ||
1da177e4 LT |
84 | /* These are the "meat" - everything else is stuffing */ |
85 | static int udf_fill_super(struct super_block *, void *, int); | |
86 | static void udf_put_super(struct super_block *); | |
146bca72 | 87 | static int udf_sync_fs(struct super_block *, int); |
1da177e4 | 88 | static int udf_remount_fs(struct super_block *, int *, char *); |
5ca4e4be | 89 | static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); |
5ca4e4be PE |
90 | static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, |
91 | struct kernel_lb_addr *); | |
cb00ea35 | 92 | static void udf_load_fileset(struct super_block *, struct buffer_head *, |
5ca4e4be | 93 | struct kernel_lb_addr *); |
1da177e4 LT |
94 | static void udf_open_lvid(struct super_block *); |
95 | static void udf_close_lvid(struct super_block *); | |
96 | static unsigned int udf_count_free(struct super_block *); | |
726c3342 | 97 | static int udf_statfs(struct dentry *, struct kstatfs *); |
34c80b1d | 98 | static int udf_show_options(struct seq_file *, struct dentry *); |
1da177e4 | 99 | |
69d75671 | 100 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb) |
6c79e987 | 101 | { |
69d75671 JK |
102 | struct logicalVolIntegrityDesc *lvid; |
103 | unsigned int partnum; | |
104 | unsigned int offset; | |
105 | ||
106 | if (!UDF_SB(sb)->s_lvid_bh) | |
107 | return NULL; | |
108 | lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data; | |
109 | partnum = le32_to_cpu(lvid->numOfPartitions); | |
110 | if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) - | |
111 | offsetof(struct logicalVolIntegrityDesc, impUse)) / | |
112 | (2 * sizeof(uint32_t)) < partnum) { | |
113 | udf_err(sb, "Logical volume integrity descriptor corrupted " | |
114 | "(numOfPartitions = %u)!\n", partnum); | |
115 | return NULL; | |
116 | } | |
117 | /* The offset is to skip freeSpaceTable and sizeTable arrays */ | |
118 | offset = partnum * 2 * sizeof(uint32_t); | |
6c79e987 MS |
119 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
120 | } | |
121 | ||
1da177e4 | 122 | /* UDF filesystem type */ |
152a0836 AV |
123 | static struct dentry *udf_mount(struct file_system_type *fs_type, |
124 | int flags, const char *dev_name, void *data) | |
1da177e4 | 125 | { |
152a0836 | 126 | return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super); |
1da177e4 LT |
127 | } |
128 | ||
129 | static struct file_system_type udf_fstype = { | |
28de7948 CG |
130 | .owner = THIS_MODULE, |
131 | .name = "udf", | |
152a0836 | 132 | .mount = udf_mount, |
28de7948 CG |
133 | .kill_sb = kill_block_super, |
134 | .fs_flags = FS_REQUIRES_DEV, | |
1da177e4 | 135 | }; |
3e64fe5b | 136 | MODULE_ALIAS_FS("udf"); |
1da177e4 | 137 | |
cb00ea35 | 138 | static struct kmem_cache *udf_inode_cachep; |
1da177e4 LT |
139 | |
140 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
141 | { | |
142 | struct udf_inode_info *ei; | |
3a71fc5d | 143 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
144 | if (!ei) |
145 | return NULL; | |
95f8797f DB |
146 | |
147 | ei->i_unique = 0; | |
148 | ei->i_lenExtents = 0; | |
149 | ei->i_next_alloc_block = 0; | |
150 | ei->i_next_alloc_goal = 0; | |
151 | ei->i_strat4096 = 0; | |
4d0fb621 | 152 | init_rwsem(&ei->i_data_sem); |
99600051 NJ |
153 | ei->cached_extent.lstart = -1; |
154 | spin_lock_init(&ei->i_extent_cache_lock); | |
95f8797f | 155 | |
1da177e4 LT |
156 | return &ei->vfs_inode; |
157 | } | |
158 | ||
fa0d7e3d | 159 | static void udf_i_callback(struct rcu_head *head) |
1da177e4 | 160 | { |
fa0d7e3d | 161 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
162 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); |
163 | } | |
164 | ||
fa0d7e3d NP |
165 | static void udf_destroy_inode(struct inode *inode) |
166 | { | |
167 | call_rcu(&inode->i_rcu, udf_i_callback); | |
168 | } | |
169 | ||
51cc5068 | 170 | static void init_once(void *foo) |
1da177e4 | 171 | { |
cb00ea35 | 172 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 173 | |
a35afb83 CL |
174 | ei->i_ext.i_data = NULL; |
175 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
176 | } |
177 | ||
53ea18de | 178 | static int __init init_inodecache(void) |
1da177e4 LT |
179 | { |
180 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
181 | sizeof(struct udf_inode_info), | |
cb00ea35 CG |
182 | 0, (SLAB_RECLAIM_ACCOUNT | |
183 | SLAB_MEM_SPREAD), | |
20c2df83 | 184 | init_once); |
28de7948 | 185 | if (!udf_inode_cachep) |
1da177e4 LT |
186 | return -ENOMEM; |
187 | return 0; | |
188 | } | |
189 | ||
190 | static void destroy_inodecache(void) | |
191 | { | |
8c0a8537 KS |
192 | /* |
193 | * Make sure all delayed rcu free inodes are flushed before we | |
194 | * destroy cache. | |
195 | */ | |
196 | rcu_barrier(); | |
1a1d92c1 | 197 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
198 | } |
199 | ||
200 | /* Superblock operations */ | |
ee9b6d61 | 201 | static const struct super_operations udf_sb_ops = { |
28de7948 CG |
202 | .alloc_inode = udf_alloc_inode, |
203 | .destroy_inode = udf_destroy_inode, | |
204 | .write_inode = udf_write_inode, | |
3aac2b62 | 205 | .evict_inode = udf_evict_inode, |
28de7948 | 206 | .put_super = udf_put_super, |
146bca72 | 207 | .sync_fs = udf_sync_fs, |
28de7948 CG |
208 | .statfs = udf_statfs, |
209 | .remount_fs = udf_remount_fs, | |
6da80894 | 210 | .show_options = udf_show_options, |
1da177e4 LT |
211 | }; |
212 | ||
cb00ea35 | 213 | struct udf_options { |
1da177e4 LT |
214 | unsigned char novrs; |
215 | unsigned int blocksize; | |
216 | unsigned int session; | |
217 | unsigned int lastblock; | |
218 | unsigned int anchor; | |
219 | unsigned int volume; | |
220 | unsigned short partition; | |
221 | unsigned int fileset; | |
222 | unsigned int rootdir; | |
223 | unsigned int flags; | |
faa17292 | 224 | umode_t umask; |
c2ba138a EB |
225 | kgid_t gid; |
226 | kuid_t uid; | |
faa17292 AV |
227 | umode_t fmode; |
228 | umode_t dmode; | |
1da177e4 LT |
229 | struct nls_table *nls_map; |
230 | }; | |
231 | ||
232 | static int __init init_udf_fs(void) | |
233 | { | |
234 | int err; | |
28de7948 | 235 | |
1da177e4 LT |
236 | err = init_inodecache(); |
237 | if (err) | |
238 | goto out1; | |
239 | err = register_filesystem(&udf_fstype); | |
240 | if (err) | |
241 | goto out; | |
28de7948 | 242 | |
1da177e4 | 243 | return 0; |
28de7948 CG |
244 | |
245 | out: | |
1da177e4 | 246 | destroy_inodecache(); |
28de7948 CG |
247 | |
248 | out1: | |
1da177e4 LT |
249 | return err; |
250 | } | |
251 | ||
252 | static void __exit exit_udf_fs(void) | |
253 | { | |
254 | unregister_filesystem(&udf_fstype); | |
255 | destroy_inodecache(); | |
256 | } | |
257 | ||
258 | module_init(init_udf_fs) | |
28de7948 | 259 | module_exit(exit_udf_fs) |
1da177e4 | 260 | |
dc5d39be MS |
261 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
262 | { | |
263 | struct udf_sb_info *sbi = UDF_SB(sb); | |
264 | ||
265 | sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), | |
266 | GFP_KERNEL); | |
267 | if (!sbi->s_partmaps) { | |
8076c363 JP |
268 | udf_err(sb, "Unable to allocate space for %d partition maps\n", |
269 | count); | |
dc5d39be MS |
270 | sbi->s_partitions = 0; |
271 | return -ENOMEM; | |
272 | } | |
273 | ||
274 | sbi->s_partitions = count; | |
275 | return 0; | |
276 | } | |
277 | ||
bff943af JK |
278 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
279 | { | |
280 | int i; | |
281 | int nr_groups = bitmap->s_nr_groups; | |
282 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * | |
283 | nr_groups); | |
284 | ||
285 | for (i = 0; i < nr_groups; i++) | |
286 | if (bitmap->s_block_bitmap[i]) | |
287 | brelse(bitmap->s_block_bitmap[i]); | |
288 | ||
289 | if (size <= PAGE_SIZE) | |
290 | kfree(bitmap); | |
291 | else | |
292 | vfree(bitmap); | |
293 | } | |
294 | ||
295 | static void udf_free_partition(struct udf_part_map *map) | |
296 | { | |
297 | int i; | |
298 | struct udf_meta_data *mdata; | |
299 | ||
300 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
301 | iput(map->s_uspace.s_table); | |
302 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
303 | iput(map->s_fspace.s_table); | |
304 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
305 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
306 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) | |
307 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); | |
308 | if (map->s_partition_type == UDF_SPARABLE_MAP15) | |
309 | for (i = 0; i < 4; i++) | |
310 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
311 | else if (map->s_partition_type == UDF_METADATA_MAP25) { | |
312 | mdata = &map->s_type_specific.s_metadata; | |
313 | iput(mdata->s_metadata_fe); | |
314 | mdata->s_metadata_fe = NULL; | |
315 | ||
316 | iput(mdata->s_mirror_fe); | |
317 | mdata->s_mirror_fe = NULL; | |
318 | ||
319 | iput(mdata->s_bitmap_fe); | |
320 | mdata->s_bitmap_fe = NULL; | |
321 | } | |
322 | } | |
323 | ||
324 | static void udf_sb_free_partitions(struct super_block *sb) | |
325 | { | |
326 | struct udf_sb_info *sbi = UDF_SB(sb); | |
327 | int i; | |
1b1baff6 NJ |
328 | if (sbi->s_partmaps == NULL) |
329 | return; | |
bff943af JK |
330 | for (i = 0; i < sbi->s_partitions; i++) |
331 | udf_free_partition(&sbi->s_partmaps[i]); | |
332 | kfree(sbi->s_partmaps); | |
333 | sbi->s_partmaps = NULL; | |
334 | } | |
335 | ||
34c80b1d | 336 | static int udf_show_options(struct seq_file *seq, struct dentry *root) |
6da80894 | 337 | { |
34c80b1d | 338 | struct super_block *sb = root->d_sb; |
6da80894 MS |
339 | struct udf_sb_info *sbi = UDF_SB(sb); |
340 | ||
341 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
342 | seq_puts(seq, ",nostrict"); | |
1197e4df | 343 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) |
6da80894 MS |
344 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); |
345 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
346 | seq_puts(seq, ",unhide"); | |
347 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
348 | seq_puts(seq, ",undelete"); | |
349 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
350 | seq_puts(seq, ",noadinicb"); | |
351 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
352 | seq_puts(seq, ",shortad"); | |
353 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
354 | seq_puts(seq, ",uid=forget"); | |
355 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) | |
356 | seq_puts(seq, ",uid=ignore"); | |
357 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) | |
358 | seq_puts(seq, ",gid=forget"); | |
359 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) | |
360 | seq_puts(seq, ",gid=ignore"); | |
361 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) | |
c2ba138a | 362 | seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid)); |
6da80894 | 363 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) |
c2ba138a | 364 | seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid)); |
6da80894 | 365 | if (sbi->s_umask != 0) |
faa17292 | 366 | seq_printf(seq, ",umask=%ho", sbi->s_umask); |
87bc730c | 367 | if (sbi->s_fmode != UDF_INVALID_MODE) |
faa17292 | 368 | seq_printf(seq, ",mode=%ho", sbi->s_fmode); |
87bc730c | 369 | if (sbi->s_dmode != UDF_INVALID_MODE) |
faa17292 | 370 | seq_printf(seq, ",dmode=%ho", sbi->s_dmode); |
6da80894 MS |
371 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) |
372 | seq_printf(seq, ",session=%u", sbi->s_session); | |
373 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) | |
374 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
40346005 JK |
375 | if (sbi->s_anchor != 0) |
376 | seq_printf(seq, ",anchor=%u", sbi->s_anchor); | |
6da80894 MS |
377 | /* |
378 | * volume, partition, fileset and rootdir seem to be ignored | |
379 | * currently | |
380 | */ | |
381 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) | |
382 | seq_puts(seq, ",utf8"); | |
383 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
384 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
1da177e4 LT |
389 | /* |
390 | * udf_parse_options | |
391 | * | |
392 | * PURPOSE | |
393 | * Parse mount options. | |
394 | * | |
395 | * DESCRIPTION | |
396 | * The following mount options are supported: | |
397 | * | |
398 | * gid= Set the default group. | |
399 | * umask= Set the default umask. | |
7ac9bcd5 MS |
400 | * mode= Set the default file permissions. |
401 | * dmode= Set the default directory permissions. | |
1da177e4 LT |
402 | * uid= Set the default user. |
403 | * bs= Set the block size. | |
404 | * unhide Show otherwise hidden files. | |
405 | * undelete Show deleted files in lists. | |
406 | * adinicb Embed data in the inode (default) | |
407 | * noadinicb Don't embed data in the inode | |
408 | * shortad Use short ad's | |
409 | * longad Use long ad's (default) | |
410 | * nostrict Unset strict conformance | |
411 | * iocharset= Set the NLS character set | |
412 | * | |
413 | * The remaining are for debugging and disaster recovery: | |
414 | * | |
28de7948 | 415 | * novrs Skip volume sequence recognition |
1da177e4 LT |
416 | * |
417 | * The following expect a offset from 0. | |
418 | * | |
419 | * session= Set the CDROM session (default= last session) | |
420 | * anchor= Override standard anchor location. (default= 256) | |
421 | * volume= Override the VolumeDesc location. (unused) | |
422 | * partition= Override the PartitionDesc location. (unused) | |
423 | * lastblock= Set the last block of the filesystem/ | |
424 | * | |
425 | * The following expect a offset from the partition root. | |
426 | * | |
427 | * fileset= Override the fileset block location. (unused) | |
428 | * rootdir= Override the root directory location. (unused) | |
429 | * WARNING: overriding the rootdir to a non-directory may | |
430 | * yield highly unpredictable results. | |
431 | * | |
432 | * PRE-CONDITIONS | |
433 | * options Pointer to mount options string. | |
434 | * uopts Pointer to mount options variable. | |
435 | * | |
436 | * POST-CONDITIONS | |
437 | * <return> 1 Mount options parsed okay. | |
438 | * <return> 0 Error parsing mount options. | |
439 | * | |
440 | * HISTORY | |
441 | * July 1, 1997 - Andrew E. Mileski | |
442 | * Written, tested, and released. | |
443 | */ | |
28de7948 | 444 | |
1da177e4 LT |
445 | enum { |
446 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
447 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
448 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
449 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
450 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
7ac9bcd5 MS |
451 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, |
452 | Opt_fmode, Opt_dmode | |
1da177e4 LT |
453 | }; |
454 | ||
a447c093 | 455 | static const match_table_t tokens = { |
28de7948 CG |
456 | {Opt_novrs, "novrs"}, |
457 | {Opt_nostrict, "nostrict"}, | |
458 | {Opt_bs, "bs=%u"}, | |
459 | {Opt_unhide, "unhide"}, | |
460 | {Opt_undelete, "undelete"}, | |
461 | {Opt_noadinicb, "noadinicb"}, | |
462 | {Opt_adinicb, "adinicb"}, | |
463 | {Opt_shortad, "shortad"}, | |
464 | {Opt_longad, "longad"}, | |
465 | {Opt_uforget, "uid=forget"}, | |
466 | {Opt_uignore, "uid=ignore"}, | |
467 | {Opt_gforget, "gid=forget"}, | |
468 | {Opt_gignore, "gid=ignore"}, | |
469 | {Opt_gid, "gid=%u"}, | |
470 | {Opt_uid, "uid=%u"}, | |
471 | {Opt_umask, "umask=%o"}, | |
472 | {Opt_session, "session=%u"}, | |
473 | {Opt_lastblock, "lastblock=%u"}, | |
474 | {Opt_anchor, "anchor=%u"}, | |
475 | {Opt_volume, "volume=%u"}, | |
476 | {Opt_partition, "partition=%u"}, | |
477 | {Opt_fileset, "fileset=%u"}, | |
478 | {Opt_rootdir, "rootdir=%u"}, | |
479 | {Opt_utf8, "utf8"}, | |
480 | {Opt_iocharset, "iocharset=%s"}, | |
7ac9bcd5 MS |
481 | {Opt_fmode, "mode=%o"}, |
482 | {Opt_dmode, "dmode=%o"}, | |
28de7948 | 483 | {Opt_err, NULL} |
1da177e4 LT |
484 | }; |
485 | ||
6da80894 MS |
486 | static int udf_parse_options(char *options, struct udf_options *uopt, |
487 | bool remount) | |
1da177e4 LT |
488 | { |
489 | char *p; | |
490 | int option; | |
491 | ||
492 | uopt->novrs = 0; | |
1da177e4 LT |
493 | uopt->partition = 0xFFFF; |
494 | uopt->session = 0xFFFFFFFF; | |
495 | uopt->lastblock = 0; | |
496 | uopt->anchor = 0; | |
497 | uopt->volume = 0xFFFFFFFF; | |
498 | uopt->rootdir = 0xFFFFFFFF; | |
499 | uopt->fileset = 0xFFFFFFFF; | |
500 | uopt->nls_map = NULL; | |
501 | ||
502 | if (!options) | |
503 | return 1; | |
504 | ||
cb00ea35 | 505 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
506 | substring_t args[MAX_OPT_ARGS]; |
507 | int token; | |
8c6915ae | 508 | unsigned n; |
1da177e4 LT |
509 | if (!*p) |
510 | continue; | |
511 | ||
512 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
513 | switch (token) { |
514 | case Opt_novrs: | |
515 | uopt->novrs = 1; | |
4136801a | 516 | break; |
cb00ea35 CG |
517 | case Opt_bs: |
518 | if (match_int(&args[0], &option)) | |
519 | return 0; | |
8c6915ae FF |
520 | n = option; |
521 | if (n != 512 && n != 1024 && n != 2048 && n != 4096) | |
522 | return 0; | |
523 | uopt->blocksize = n; | |
1197e4df | 524 | uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); |
cb00ea35 CG |
525 | break; |
526 | case Opt_unhide: | |
527 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
528 | break; | |
529 | case Opt_undelete: | |
530 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
531 | break; | |
532 | case Opt_noadinicb: | |
533 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
534 | break; | |
535 | case Opt_adinicb: | |
536 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
537 | break; | |
538 | case Opt_shortad: | |
539 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
540 | break; | |
541 | case Opt_longad: | |
542 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
543 | break; | |
544 | case Opt_gid: | |
545 | if (match_int(args, &option)) | |
546 | return 0; | |
c2ba138a EB |
547 | uopt->gid = make_kgid(current_user_ns(), option); |
548 | if (!gid_valid(uopt->gid)) | |
549 | return 0; | |
ca76d2d8 | 550 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
551 | break; |
552 | case Opt_uid: | |
553 | if (match_int(args, &option)) | |
554 | return 0; | |
c2ba138a EB |
555 | uopt->uid = make_kuid(current_user_ns(), option); |
556 | if (!uid_valid(uopt->uid)) | |
557 | return 0; | |
ca76d2d8 | 558 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
559 | break; |
560 | case Opt_umask: | |
561 | if (match_octal(args, &option)) | |
562 | return 0; | |
563 | uopt->umask = option; | |
564 | break; | |
565 | case Opt_nostrict: | |
566 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
567 | break; | |
568 | case Opt_session: | |
569 | if (match_int(args, &option)) | |
570 | return 0; | |
571 | uopt->session = option; | |
6da80894 MS |
572 | if (!remount) |
573 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
574 | break; |
575 | case Opt_lastblock: | |
576 | if (match_int(args, &option)) | |
577 | return 0; | |
578 | uopt->lastblock = option; | |
6da80894 MS |
579 | if (!remount) |
580 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
581 | break; |
582 | case Opt_anchor: | |
583 | if (match_int(args, &option)) | |
584 | return 0; | |
585 | uopt->anchor = option; | |
586 | break; | |
587 | case Opt_volume: | |
588 | if (match_int(args, &option)) | |
589 | return 0; | |
590 | uopt->volume = option; | |
591 | break; | |
592 | case Opt_partition: | |
593 | if (match_int(args, &option)) | |
594 | return 0; | |
595 | uopt->partition = option; | |
596 | break; | |
597 | case Opt_fileset: | |
598 | if (match_int(args, &option)) | |
599 | return 0; | |
600 | uopt->fileset = option; | |
601 | break; | |
602 | case Opt_rootdir: | |
603 | if (match_int(args, &option)) | |
604 | return 0; | |
605 | uopt->rootdir = option; | |
606 | break; | |
607 | case Opt_utf8: | |
608 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
609 | break; | |
1da177e4 | 610 | #ifdef CONFIG_UDF_NLS |
cb00ea35 CG |
611 | case Opt_iocharset: |
612 | uopt->nls_map = load_nls(args[0].from); | |
613 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
614 | break; | |
1da177e4 | 615 | #endif |
cb00ea35 CG |
616 | case Opt_uignore: |
617 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); | |
618 | break; | |
619 | case Opt_uforget: | |
620 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
621 | break; | |
622 | case Opt_gignore: | |
623 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); | |
624 | break; | |
625 | case Opt_gforget: | |
626 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
627 | break; | |
7ac9bcd5 MS |
628 | case Opt_fmode: |
629 | if (match_octal(args, &option)) | |
630 | return 0; | |
631 | uopt->fmode = option & 0777; | |
632 | break; | |
633 | case Opt_dmode: | |
634 | if (match_octal(args, &option)) | |
635 | return 0; | |
636 | uopt->dmode = option & 0777; | |
637 | break; | |
cb00ea35 | 638 | default: |
78ace70c | 639 | pr_err("bad mount option \"%s\" or missing value\n", p); |
1da177e4 LT |
640 | return 0; |
641 | } | |
642 | } | |
643 | return 1; | |
644 | } | |
645 | ||
cb00ea35 | 646 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
647 | { |
648 | struct udf_options uopt; | |
6c79e987 | 649 | struct udf_sb_info *sbi = UDF_SB(sb); |
c79d967d | 650 | int error = 0; |
69d75671 | 651 | struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb); |
1da177e4 | 652 | |
02b9984d | 653 | sync_filesystem(sb); |
69d75671 JK |
654 | if (lvidiu) { |
655 | int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
e729eac6 JK |
656 | if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY)) |
657 | return -EACCES; | |
658 | } | |
659 | ||
6c79e987 MS |
660 | uopt.flags = sbi->s_flags; |
661 | uopt.uid = sbi->s_uid; | |
662 | uopt.gid = sbi->s_gid; | |
663 | uopt.umask = sbi->s_umask; | |
7ac9bcd5 MS |
664 | uopt.fmode = sbi->s_fmode; |
665 | uopt.dmode = sbi->s_dmode; | |
1da177e4 | 666 | |
6da80894 | 667 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
668 | return -EINVAL; |
669 | ||
c03cad24 | 670 | write_lock(&sbi->s_cred_lock); |
6c79e987 MS |
671 | sbi->s_flags = uopt.flags; |
672 | sbi->s_uid = uopt.uid; | |
673 | sbi->s_gid = uopt.gid; | |
674 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
675 | sbi->s_fmode = uopt.fmode; |
676 | sbi->s_dmode = uopt.dmode; | |
c03cad24 | 677 | write_unlock(&sbi->s_cred_lock); |
1da177e4 | 678 | |
c79d967d CH |
679 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
680 | goto out_unlock; | |
681 | ||
36350462 | 682 | if (*flags & MS_RDONLY) |
1da177e4 | 683 | udf_close_lvid(sb); |
36350462 | 684 | else |
1da177e4 LT |
685 | udf_open_lvid(sb); |
686 | ||
c79d967d | 687 | out_unlock: |
c79d967d | 688 | return error; |
1da177e4 LT |
689 | } |
690 | ||
40346005 JK |
691 | /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ |
692 | /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
693 | static loff_t udf_check_vsd(struct super_block *sb) | |
1da177e4 LT |
694 | { |
695 | struct volStructDesc *vsd = NULL; | |
44499602 | 696 | loff_t sector = VSD_FIRST_SECTOR_OFFSET; |
1da177e4 LT |
697 | int sectorsize; |
698 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
699 | int nsr02 = 0; |
700 | int nsr03 = 0; | |
6c79e987 | 701 | struct udf_sb_info *sbi; |
1da177e4 | 702 | |
6c79e987 | 703 | sbi = UDF_SB(sb); |
1da177e4 LT |
704 | if (sb->s_blocksize < sizeof(struct volStructDesc)) |
705 | sectorsize = sizeof(struct volStructDesc); | |
706 | else | |
707 | sectorsize = sb->s_blocksize; | |
708 | ||
6c79e987 | 709 | sector += (sbi->s_session << sb->s_blocksize_bits); |
1da177e4 LT |
710 | |
711 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
706047a7 SM |
712 | (unsigned int)(sector >> sb->s_blocksize_bits), |
713 | sb->s_blocksize); | |
44499602 PF |
714 | /* Process the sequence (if applicable). The hard limit on the sector |
715 | * offset is arbitrary, hopefully large enough so that all valid UDF | |
716 | * filesystems will be recognised. There is no mention of an upper | |
717 | * bound to the size of the volume recognition area in the standard. | |
718 | * The limit will prevent the code to read all the sectors of a | |
719 | * specially crafted image (like a bluray disc full of CD001 sectors), | |
720 | * potentially causing minutes or even hours of uninterruptible I/O | |
721 | * activity. This actually happened with uninitialised SSD partitions | |
722 | * (all 0xFF) before the check for the limit and all valid IDs were | |
723 | * added */ | |
724 | for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET; | |
725 | sector += sectorsize) { | |
1da177e4 LT |
726 | /* Read a block */ |
727 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
728 | if (!bh) | |
729 | break; | |
730 | ||
731 | /* Look for ISO descriptors */ | |
732 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 733 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 734 | |
44499602 | 735 | if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
3a71fc5d | 736 | VSD_STD_ID_LEN)) { |
cb00ea35 CG |
737 | switch (vsd->structType) { |
738 | case 0: | |
739 | udf_debug("ISO9660 Boot Record found\n"); | |
740 | break; | |
741 | case 1: | |
a983f368 | 742 | udf_debug("ISO9660 Primary Volume Descriptor found\n"); |
cb00ea35 CG |
743 | break; |
744 | case 2: | |
a983f368 | 745 | udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); |
cb00ea35 CG |
746 | break; |
747 | case 3: | |
a983f368 | 748 | udf_debug("ISO9660 Volume Partition Descriptor found\n"); |
cb00ea35 CG |
749 | break; |
750 | case 255: | |
a983f368 | 751 | udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); |
cb00ea35 CG |
752 | break; |
753 | default: | |
754 | udf_debug("ISO9660 VRS (%u) found\n", | |
755 | vsd->structType); | |
756 | break; | |
1da177e4 | 757 | } |
3a71fc5d MS |
758 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
759 | VSD_STD_ID_LEN)) | |
760 | ; /* nothing */ | |
761 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
762 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 763 | brelse(bh); |
1da177e4 | 764 | break; |
3a71fc5d MS |
765 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
766 | VSD_STD_ID_LEN)) | |
1da177e4 | 767 | nsr02 = sector; |
3a71fc5d MS |
768 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
769 | VSD_STD_ID_LEN)) | |
1da177e4 | 770 | nsr03 = sector; |
44499602 PF |
771 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2, |
772 | VSD_STD_ID_LEN)) | |
773 | ; /* nothing */ | |
774 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02, | |
775 | VSD_STD_ID_LEN)) | |
776 | ; /* nothing */ | |
777 | else { | |
778 | /* invalid id : end of volume recognition area */ | |
779 | brelse(bh); | |
780 | break; | |
781 | } | |
3bf25cb4 | 782 | brelse(bh); |
1da177e4 LT |
783 | } |
784 | ||
785 | if (nsr03) | |
786 | return nsr03; | |
787 | else if (nsr02) | |
788 | return nsr02; | |
44499602 PF |
789 | else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) == |
790 | VSD_FIRST_SECTOR_OFFSET) | |
1da177e4 LT |
791 | return -1; |
792 | else | |
793 | return 0; | |
794 | } | |
795 | ||
3a71fc5d | 796 | static int udf_find_fileset(struct super_block *sb, |
5ca4e4be PE |
797 | struct kernel_lb_addr *fileset, |
798 | struct kernel_lb_addr *root) | |
1da177e4 LT |
799 | { |
800 | struct buffer_head *bh = NULL; | |
801 | long lastblock; | |
802 | uint16_t ident; | |
6c79e987 | 803 | struct udf_sb_info *sbi; |
1da177e4 LT |
804 | |
805 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 806 | fileset->partitionReferenceNum != 0xFFFF) { |
97e961fd | 807 | bh = udf_read_ptagged(sb, fileset, 0, &ident); |
1da177e4 | 808 | |
28de7948 | 809 | if (!bh) { |
1da177e4 | 810 | return 1; |
28de7948 | 811 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 812 | brelse(bh); |
1da177e4 LT |
813 | return 1; |
814 | } | |
cb00ea35 | 815 | |
1da177e4 LT |
816 | } |
817 | ||
6c79e987 | 818 | sbi = UDF_SB(sb); |
3a71fc5d MS |
819 | if (!bh) { |
820 | /* Search backwards through the partitions */ | |
5ca4e4be | 821 | struct kernel_lb_addr newfileset; |
1da177e4 | 822 | |
28de7948 | 823 | /* --> cvg: FIXME - is it reasonable? */ |
1da177e4 | 824 | return 1; |
cb00ea35 | 825 | |
6c79e987 | 826 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
cb00ea35 CG |
827 | (newfileset.partitionReferenceNum != 0xFFFF && |
828 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
829 | fileset->partitionReferenceNum == 0xFFFF); | |
830 | newfileset.partitionReferenceNum--) { | |
6c79e987 MS |
831 | lastblock = sbi->s_partmaps |
832 | [newfileset.partitionReferenceNum] | |
833 | .s_partition_len; | |
1da177e4 LT |
834 | newfileset.logicalBlockNum = 0; |
835 | ||
cb00ea35 | 836 | do { |
97e961fd | 837 | bh = udf_read_ptagged(sb, &newfileset, 0, |
3a71fc5d | 838 | &ident); |
cb00ea35 CG |
839 | if (!bh) { |
840 | newfileset.logicalBlockNum++; | |
1da177e4 LT |
841 | continue; |
842 | } | |
843 | ||
cb00ea35 CG |
844 | switch (ident) { |
845 | case TAG_IDENT_SBD: | |
28de7948 CG |
846 | { |
847 | struct spaceBitmapDesc *sp; | |
4b11111a MS |
848 | sp = (struct spaceBitmapDesc *) |
849 | bh->b_data; | |
28de7948 CG |
850 | newfileset.logicalBlockNum += 1 + |
851 | ((le32_to_cpu(sp->numOfBytes) + | |
4b11111a MS |
852 | sizeof(struct spaceBitmapDesc) |
853 | - 1) >> sb->s_blocksize_bits); | |
28de7948 CG |
854 | brelse(bh); |
855 | break; | |
856 | } | |
cb00ea35 | 857 | case TAG_IDENT_FSD: |
28de7948 CG |
858 | *fileset = newfileset; |
859 | break; | |
cb00ea35 | 860 | default: |
28de7948 CG |
861 | newfileset.logicalBlockNum++; |
862 | brelse(bh); | |
863 | bh = NULL; | |
864 | break; | |
1da177e4 | 865 | } |
28de7948 CG |
866 | } while (newfileset.logicalBlockNum < lastblock && |
867 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
868 | fileset->partitionReferenceNum == 0xFFFF); | |
1da177e4 LT |
869 | } |
870 | } | |
871 | ||
872 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 873 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
1da177e4 | 874 | udf_debug("Fileset at block=%d, partition=%d\n", |
cb00ea35 CG |
875 | fileset->logicalBlockNum, |
876 | fileset->partitionReferenceNum); | |
1da177e4 | 877 | |
6c79e987 | 878 | sbi->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 879 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 880 | brelse(bh); |
1da177e4 LT |
881 | return 0; |
882 | } | |
883 | return 1; | |
884 | } | |
885 | ||
d759bfa4 JK |
886 | /* |
887 | * Load primary Volume Descriptor Sequence | |
888 | * | |
889 | * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence | |
890 | * should be tried. | |
891 | */ | |
c0eb31ed | 892 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
893 | { |
894 | struct primaryVolDesc *pvoldesc; | |
ba9aadd8 | 895 | struct ustr *instr, *outstr; |
c0eb31ed JK |
896 | struct buffer_head *bh; |
897 | uint16_t ident; | |
d759bfa4 | 898 | int ret = -ENOMEM; |
ba9aadd8 MS |
899 | |
900 | instr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
901 | if (!instr) | |
d759bfa4 | 902 | return -ENOMEM; |
ba9aadd8 MS |
903 | |
904 | outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
905 | if (!outstr) | |
906 | goto out1; | |
c0eb31ed JK |
907 | |
908 | bh = udf_read_tagged(sb, block, block, &ident); | |
d759bfa4 JK |
909 | if (!bh) { |
910 | ret = -EAGAIN; | |
ba9aadd8 | 911 | goto out2; |
d759bfa4 | 912 | } |
ba9aadd8 | 913 | |
d759bfa4 JK |
914 | if (ident != TAG_IDENT_PVD) { |
915 | ret = -EIO; | |
916 | goto out_bh; | |
917 | } | |
1da177e4 LT |
918 | |
919 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
920 | ||
56774805 MS |
921 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
922 | pvoldesc->recordingDateAndTime)) { | |
af15a298 | 923 | #ifdef UDFFS_DEBUG |
5ca4e4be | 924 | struct timestamp *ts = &pvoldesc->recordingDateAndTime; |
a983f368 | 925 | udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", |
af15a298 MS |
926 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, |
927 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
928 | #endif | |
1da177e4 LT |
929 | } |
930 | ||
ba9aadd8 MS |
931 | if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) |
932 | if (udf_CS0toUTF8(outstr, instr)) { | |
933 | strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, | |
934 | outstr->u_len > 31 ? 31 : outstr->u_len); | |
4b11111a | 935 | udf_debug("volIdent[] = '%s'\n", |
a983f368 | 936 | UDF_SB(sb)->s_volume_ident); |
1da177e4 | 937 | } |
1da177e4 | 938 | |
ba9aadd8 MS |
939 | if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) |
940 | if (udf_CS0toUTF8(outstr, instr)) | |
941 | udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); | |
c0eb31ed | 942 | |
ba9aadd8 | 943 | ret = 0; |
d759bfa4 JK |
944 | out_bh: |
945 | brelse(bh); | |
ba9aadd8 MS |
946 | out2: |
947 | kfree(outstr); | |
948 | out1: | |
949 | kfree(instr); | |
950 | return ret; | |
1da177e4 LT |
951 | } |
952 | ||
3080a74e NJ |
953 | struct inode *udf_find_metadata_inode_efe(struct super_block *sb, |
954 | u32 meta_file_loc, u32 partition_num) | |
955 | { | |
956 | struct kernel_lb_addr addr; | |
957 | struct inode *metadata_fe; | |
958 | ||
959 | addr.logicalBlockNum = meta_file_loc; | |
960 | addr.partitionReferenceNum = partition_num; | |
961 | ||
962 | metadata_fe = udf_iget(sb, &addr); | |
963 | ||
6d3d5e86 | 964 | if (IS_ERR(metadata_fe)) { |
3080a74e | 965 | udf_warn(sb, "metadata inode efe not found\n"); |
6d3d5e86 JK |
966 | return metadata_fe; |
967 | } | |
968 | if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { | |
3080a74e NJ |
969 | udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); |
970 | iput(metadata_fe); | |
6d3d5e86 | 971 | return ERR_PTR(-EIO); |
3080a74e NJ |
972 | } |
973 | ||
974 | return metadata_fe; | |
975 | } | |
976 | ||
bfb257a5 JK |
977 | static int udf_load_metadata_files(struct super_block *sb, int partition) |
978 | { | |
979 | struct udf_sb_info *sbi = UDF_SB(sb); | |
980 | struct udf_part_map *map; | |
981 | struct udf_meta_data *mdata; | |
5ca4e4be | 982 | struct kernel_lb_addr addr; |
6d3d5e86 | 983 | struct inode *fe; |
bfb257a5 JK |
984 | |
985 | map = &sbi->s_partmaps[partition]; | |
986 | mdata = &map->s_type_specific.s_metadata; | |
987 | ||
988 | /* metadata address */ | |
bfb257a5 | 989 | udf_debug("Metadata file location: block = %d part = %d\n", |
3080a74e | 990 | mdata->s_meta_file_loc, map->s_partition_num); |
bfb257a5 | 991 | |
6d3d5e86 JK |
992 | fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc, |
993 | map->s_partition_num); | |
994 | if (IS_ERR(fe)) { | |
3080a74e NJ |
995 | /* mirror file entry */ |
996 | udf_debug("Mirror metadata file location: block = %d part = %d\n", | |
997 | mdata->s_mirror_file_loc, map->s_partition_num); | |
bfb257a5 | 998 | |
6d3d5e86 JK |
999 | fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc, |
1000 | map->s_partition_num); | |
bfb257a5 | 1001 | |
6d3d5e86 | 1002 | if (IS_ERR(fe)) { |
3080a74e | 1003 | udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); |
6d3d5e86 | 1004 | return PTR_ERR(fe); |
3080a74e | 1005 | } |
6d3d5e86 JK |
1006 | mdata->s_mirror_fe = fe; |
1007 | } else | |
1008 | mdata->s_metadata_fe = fe; | |
1009 | ||
bfb257a5 JK |
1010 | |
1011 | /* | |
1012 | * bitmap file entry | |
1013 | * Note: | |
1014 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) | |
1015 | */ | |
1016 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { | |
1017 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; | |
1018 | addr.partitionReferenceNum = map->s_partition_num; | |
1019 | ||
1020 | udf_debug("Bitmap file location: block = %d part = %d\n", | |
a983f368 | 1021 | addr.logicalBlockNum, addr.partitionReferenceNum); |
bfb257a5 | 1022 | |
6d3d5e86 JK |
1023 | fe = udf_iget(sb, &addr); |
1024 | if (IS_ERR(fe)) { | |
bfb257a5 | 1025 | if (sb->s_flags & MS_RDONLY) |
a40ecd7b | 1026 | udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); |
bfb257a5 | 1027 | else { |
8076c363 | 1028 | udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); |
6d3d5e86 | 1029 | return PTR_ERR(fe); |
bfb257a5 | 1030 | } |
6d3d5e86 JK |
1031 | } else |
1032 | mdata->s_bitmap_fe = fe; | |
bfb257a5 JK |
1033 | } |
1034 | ||
1035 | udf_debug("udf_load_metadata_files Ok\n"); | |
bfb257a5 | 1036 | return 0; |
bfb257a5 JK |
1037 | } |
1038 | ||
28de7948 | 1039 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
5ca4e4be | 1040 | struct kernel_lb_addr *root) |
1da177e4 LT |
1041 | { |
1042 | struct fileSetDesc *fset; | |
1043 | ||
1044 | fset = (struct fileSetDesc *)bh->b_data; | |
1045 | ||
1046 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
1047 | ||
6c79e987 | 1048 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 1049 | |
cb00ea35 CG |
1050 | udf_debug("Rootdir at block=%d, partition=%d\n", |
1051 | root->logicalBlockNum, root->partitionReferenceNum); | |
1da177e4 LT |
1052 | } |
1053 | ||
883cb9d1 MS |
1054 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
1055 | { | |
1056 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
1057 | return DIV_ROUND_UP(map->s_partition_len + |
1058 | (sizeof(struct spaceBitmapDesc) << 3), | |
1059 | sb->s_blocksize * 8); | |
883cb9d1 MS |
1060 | } |
1061 | ||
66e1da3f MS |
1062 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
1063 | { | |
66e1da3f MS |
1064 | struct udf_bitmap *bitmap; |
1065 | int nr_groups; | |
1066 | int size; | |
1067 | ||
883cb9d1 | 1068 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
1069 | size = sizeof(struct udf_bitmap) + |
1070 | (sizeof(struct buffer_head *) * nr_groups); | |
1071 | ||
1072 | if (size <= PAGE_SIZE) | |
ed2ae6f6 | 1073 | bitmap = kzalloc(size, GFP_KERNEL); |
66e1da3f | 1074 | else |
ed2ae6f6 | 1075 | bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ |
66e1da3f | 1076 | |
75b09e02 | 1077 | if (bitmap == NULL) |
66e1da3f | 1078 | return NULL; |
66e1da3f | 1079 | |
66e1da3f MS |
1080 | bitmap->s_nr_groups = nr_groups; |
1081 | return bitmap; | |
1082 | } | |
1083 | ||
3fb38dfa JK |
1084 | static int udf_fill_partdesc_info(struct super_block *sb, |
1085 | struct partitionDesc *p, int p_index) | |
1da177e4 | 1086 | { |
6c79e987 | 1087 | struct udf_part_map *map; |
165923fa | 1088 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 1089 | struct partitionHeaderDesc *phd; |
165923fa | 1090 | |
3fb38dfa | 1091 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
1092 | |
1093 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
1094 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
1095 | ||
1096 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
1097 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
1098 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
1099 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
1100 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
1101 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
1102 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
1103 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
1104 | ||
a983f368 JP |
1105 | udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n", |
1106 | p_index, map->s_partition_type, | |
1107 | map->s_partition_root, map->s_partition_len); | |
165923fa MS |
1108 | |
1109 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
1110 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
3fb38dfa | 1111 | return 0; |
165923fa MS |
1112 | |
1113 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1114 | if (phd->unallocSpaceTable.extLength) { | |
5ca4e4be | 1115 | struct kernel_lb_addr loc = { |
165923fa MS |
1116 | .logicalBlockNum = le32_to_cpu( |
1117 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 1118 | .partitionReferenceNum = p_index, |
165923fa | 1119 | }; |
6d3d5e86 | 1120 | struct inode *inode; |
165923fa | 1121 | |
6d3d5e86 JK |
1122 | inode = udf_iget(sb, &loc); |
1123 | if (IS_ERR(inode)) { | |
165923fa | 1124 | udf_debug("cannot load unallocSpaceTable (part %d)\n", |
a983f368 | 1125 | p_index); |
6d3d5e86 | 1126 | return PTR_ERR(inode); |
165923fa | 1127 | } |
6d3d5e86 | 1128 | map->s_uspace.s_table = inode; |
165923fa MS |
1129 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; |
1130 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", | |
a983f368 | 1131 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1132 | } |
1133 | ||
1134 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1135 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1136 | if (!bitmap) | |
d759bfa4 | 1137 | return -ENOMEM; |
165923fa | 1138 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1139 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1140 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1141 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
a983f368 JP |
1142 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", |
1143 | p_index, bitmap->s_extPosition); | |
165923fa MS |
1144 | } |
1145 | ||
1146 | if (phd->partitionIntegrityTable.extLength) | |
3fb38dfa | 1147 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); |
165923fa MS |
1148 | |
1149 | if (phd->freedSpaceTable.extLength) { | |
5ca4e4be | 1150 | struct kernel_lb_addr loc = { |
165923fa MS |
1151 | .logicalBlockNum = le32_to_cpu( |
1152 | phd->freedSpaceTable.extPosition), | |
3fb38dfa | 1153 | .partitionReferenceNum = p_index, |
165923fa | 1154 | }; |
6d3d5e86 | 1155 | struct inode *inode; |
165923fa | 1156 | |
6d3d5e86 JK |
1157 | inode = udf_iget(sb, &loc); |
1158 | if (IS_ERR(inode)) { | |
3fb38dfa | 1159 | udf_debug("cannot load freedSpaceTable (part %d)\n", |
a983f368 | 1160 | p_index); |
6d3d5e86 | 1161 | return PTR_ERR(inode); |
165923fa | 1162 | } |
6d3d5e86 | 1163 | map->s_fspace.s_table = inode; |
165923fa MS |
1164 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; |
1165 | udf_debug("freedSpaceTable (part %d) @ %ld\n", | |
a983f368 | 1166 | p_index, map->s_fspace.s_table->i_ino); |
165923fa MS |
1167 | } |
1168 | ||
1169 | if (phd->freedSpaceBitmap.extLength) { | |
3fb38dfa JK |
1170 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1171 | if (!bitmap) | |
d759bfa4 | 1172 | return -ENOMEM; |
165923fa | 1173 | map->s_fspace.s_bitmap = bitmap; |
2e0838fd | 1174 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1175 | phd->freedSpaceBitmap.extPosition); |
2e0838fd | 1176 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
a983f368 JP |
1177 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", |
1178 | p_index, bitmap->s_extPosition); | |
165923fa | 1179 | } |
3fb38dfa JK |
1180 | return 0; |
1181 | } | |
1182 | ||
e971b0b9 JK |
1183 | static void udf_find_vat_block(struct super_block *sb, int p_index, |
1184 | int type1_index, sector_t start_block) | |
38b74a53 JK |
1185 | { |
1186 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1187 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
e971b0b9 | 1188 | sector_t vat_block; |
5ca4e4be | 1189 | struct kernel_lb_addr ino; |
6d3d5e86 | 1190 | struct inode *inode; |
e971b0b9 JK |
1191 | |
1192 | /* | |
1193 | * VAT file entry is in the last recorded block. Some broken disks have | |
1194 | * it a few blocks before so try a bit harder... | |
1195 | */ | |
1196 | ino.partitionReferenceNum = type1_index; | |
1197 | for (vat_block = start_block; | |
1198 | vat_block >= map->s_partition_root && | |
6d3d5e86 | 1199 | vat_block >= start_block - 3; vat_block--) { |
e971b0b9 | 1200 | ino.logicalBlockNum = vat_block - map->s_partition_root; |
6d3d5e86 JK |
1201 | inode = udf_iget(sb, &ino); |
1202 | if (!IS_ERR(inode)) { | |
1203 | sbi->s_vat_inode = inode; | |
1204 | break; | |
1205 | } | |
e971b0b9 JK |
1206 | } |
1207 | } | |
1208 | ||
1209 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) | |
1210 | { | |
1211 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1212 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
fa5e0815 JK |
1213 | struct buffer_head *bh = NULL; |
1214 | struct udf_inode_info *vati; | |
1215 | uint32_t pos; | |
1216 | struct virtualAllocationTable20 *vat20; | |
4bf17af0 | 1217 | sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; |
38b74a53 | 1218 | |
e971b0b9 | 1219 | udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); |
4bf17af0 JK |
1220 | if (!sbi->s_vat_inode && |
1221 | sbi->s_last_block != blocks - 1) { | |
78ace70c JP |
1222 | pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", |
1223 | (unsigned long)sbi->s_last_block, | |
1224 | (unsigned long)blocks - 1); | |
e971b0b9 | 1225 | udf_find_vat_block(sb, p_index, type1_index, blocks - 1); |
4bf17af0 | 1226 | } |
38b74a53 | 1227 | if (!sbi->s_vat_inode) |
d759bfa4 | 1228 | return -EIO; |
38b74a53 JK |
1229 | |
1230 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
47c9358a | 1231 | map->s_type_specific.s_virtual.s_start_offset = 0; |
38b74a53 JK |
1232 | map->s_type_specific.s_virtual.s_num_entries = |
1233 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1234 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
fa5e0815 JK |
1235 | vati = UDF_I(sbi->s_vat_inode); |
1236 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1237 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1238 | bh = sb_bread(sb, pos); | |
1239 | if (!bh) | |
d759bfa4 | 1240 | return -EIO; |
fa5e0815 JK |
1241 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; |
1242 | } else { | |
1243 | vat20 = (struct virtualAllocationTable20 *) | |
1244 | vati->i_ext.i_data; | |
1245 | } | |
38b74a53 | 1246 | |
38b74a53 | 1247 | map->s_type_specific.s_virtual.s_start_offset = |
47c9358a | 1248 | le16_to_cpu(vat20->lengthHeader); |
38b74a53 JK |
1249 | map->s_type_specific.s_virtual.s_num_entries = |
1250 | (sbi->s_vat_inode->i_size - | |
1251 | map->s_type_specific.s_virtual. | |
1252 | s_start_offset) >> 2; | |
1253 | brelse(bh); | |
1254 | } | |
1255 | return 0; | |
1256 | } | |
1257 | ||
d759bfa4 JK |
1258 | /* |
1259 | * Load partition descriptor block | |
1260 | * | |
1261 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor | |
1262 | * sequence. | |
1263 | */ | |
3fb38dfa JK |
1264 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
1265 | { | |
1266 | struct buffer_head *bh; | |
1267 | struct partitionDesc *p; | |
1268 | struct udf_part_map *map; | |
1269 | struct udf_sb_info *sbi = UDF_SB(sb); | |
38b74a53 | 1270 | int i, type1_idx; |
3fb38dfa JK |
1271 | uint16_t partitionNumber; |
1272 | uint16_t ident; | |
d759bfa4 | 1273 | int ret; |
3fb38dfa JK |
1274 | |
1275 | bh = udf_read_tagged(sb, block, block, &ident); | |
1276 | if (!bh) | |
d759bfa4 JK |
1277 | return -EAGAIN; |
1278 | if (ident != TAG_IDENT_PD) { | |
1279 | ret = 0; | |
3fb38dfa | 1280 | goto out_bh; |
d759bfa4 | 1281 | } |
3fb38dfa JK |
1282 | |
1283 | p = (struct partitionDesc *)bh->b_data; | |
1284 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
38b74a53 | 1285 | |
bfb257a5 | 1286 | /* First scan for TYPE1, SPARABLE and METADATA partitions */ |
3fb38dfa JK |
1287 | for (i = 0; i < sbi->s_partitions; i++) { |
1288 | map = &sbi->s_partmaps[i]; | |
1289 | udf_debug("Searching map: (%d == %d)\n", | |
1290 | map->s_partition_num, partitionNumber); | |
38b74a53 JK |
1291 | if (map->s_partition_num == partitionNumber && |
1292 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1293 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
3fb38dfa JK |
1294 | break; |
1295 | } | |
1296 | ||
38b74a53 | 1297 | if (i >= sbi->s_partitions) { |
3fb38dfa JK |
1298 | udf_debug("Partition (%d) not found in partition map\n", |
1299 | partitionNumber); | |
d759bfa4 | 1300 | ret = 0; |
3fb38dfa JK |
1301 | goto out_bh; |
1302 | } | |
165923fa | 1303 | |
3fb38dfa | 1304 | ret = udf_fill_partdesc_info(sb, p, i); |
d759bfa4 JK |
1305 | if (ret < 0) |
1306 | goto out_bh; | |
38b74a53 JK |
1307 | |
1308 | /* | |
bfb257a5 JK |
1309 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
1310 | * PHYSICAL partitions are already set up | |
38b74a53 JK |
1311 | */ |
1312 | type1_idx = i; | |
44499602 PF |
1313 | #ifdef UDFFS_DEBUG |
1314 | map = NULL; /* supress 'maybe used uninitialized' warning */ | |
1315 | #endif | |
38b74a53 JK |
1316 | for (i = 0; i < sbi->s_partitions; i++) { |
1317 | map = &sbi->s_partmaps[i]; | |
1318 | ||
1319 | if (map->s_partition_num == partitionNumber && | |
1320 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
bfb257a5 JK |
1321 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
1322 | map->s_partition_type == UDF_METADATA_MAP25)) | |
38b74a53 JK |
1323 | break; |
1324 | } | |
1325 | ||
d759bfa4 JK |
1326 | if (i >= sbi->s_partitions) { |
1327 | ret = 0; | |
38b74a53 | 1328 | goto out_bh; |
d759bfa4 | 1329 | } |
38b74a53 JK |
1330 | |
1331 | ret = udf_fill_partdesc_info(sb, p, i); | |
d759bfa4 | 1332 | if (ret < 0) |
38b74a53 JK |
1333 | goto out_bh; |
1334 | ||
bfb257a5 JK |
1335 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
1336 | ret = udf_load_metadata_files(sb, i); | |
d759bfa4 | 1337 | if (ret < 0) { |
78ace70c JP |
1338 | udf_err(sb, "error loading MetaData partition map %d\n", |
1339 | i); | |
bfb257a5 JK |
1340 | goto out_bh; |
1341 | } | |
1342 | } else { | |
e729eac6 JK |
1343 | /* |
1344 | * If we have a partition with virtual map, we don't handle | |
1345 | * writing to it (we overwrite blocks instead of relocating | |
1346 | * them). | |
1347 | */ | |
1348 | if (!(sb->s_flags & MS_RDONLY)) { | |
1349 | ret = -EACCES; | |
1350 | goto out_bh; | |
1351 | } | |
bfb257a5 | 1352 | ret = udf_load_vat(sb, i, type1_idx); |
d759bfa4 | 1353 | if (ret < 0) |
bfb257a5 | 1354 | goto out_bh; |
bfb257a5 | 1355 | } |
d759bfa4 | 1356 | ret = 0; |
c0eb31ed | 1357 | out_bh: |
2e0838fd | 1358 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1359 | brelse(bh); |
1360 | return ret; | |
1da177e4 LT |
1361 | } |
1362 | ||
1df2ae31 JK |
1363 | static int udf_load_sparable_map(struct super_block *sb, |
1364 | struct udf_part_map *map, | |
1365 | struct sparablePartitionMap *spm) | |
1366 | { | |
1367 | uint32_t loc; | |
1368 | uint16_t ident; | |
1369 | struct sparingTable *st; | |
1370 | struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing; | |
1371 | int i; | |
1372 | struct buffer_head *bh; | |
1373 | ||
1374 | map->s_partition_type = UDF_SPARABLE_MAP15; | |
1375 | sdata->s_packet_len = le16_to_cpu(spm->packetLength); | |
1376 | if (!is_power_of_2(sdata->s_packet_len)) { | |
1377 | udf_err(sb, "error loading logical volume descriptor: " | |
1378 | "Invalid packet length %u\n", | |
1379 | (unsigned)sdata->s_packet_len); | |
1380 | return -EIO; | |
1381 | } | |
1382 | if (spm->numSparingTables > 4) { | |
1383 | udf_err(sb, "error loading logical volume descriptor: " | |
1384 | "Too many sparing tables (%d)\n", | |
1385 | (int)spm->numSparingTables); | |
1386 | return -EIO; | |
1387 | } | |
1388 | ||
1389 | for (i = 0; i < spm->numSparingTables; i++) { | |
1390 | loc = le32_to_cpu(spm->locSparingTable[i]); | |
1391 | bh = udf_read_tagged(sb, loc, loc, &ident); | |
1392 | if (!bh) | |
1393 | continue; | |
1394 | ||
1395 | st = (struct sparingTable *)bh->b_data; | |
1396 | if (ident != 0 || | |
1397 | strncmp(st->sparingIdent.ident, UDF_ID_SPARING, | |
1398 | strlen(UDF_ID_SPARING)) || | |
1399 | sizeof(*st) + le16_to_cpu(st->reallocationTableLen) > | |
1400 | sb->s_blocksize) { | |
1401 | brelse(bh); | |
1402 | continue; | |
1403 | } | |
1404 | ||
1405 | sdata->s_spar_map[i] = bh; | |
1406 | } | |
1407 | map->s_partition_func = udf_get_pblock_spar15; | |
1408 | return 0; | |
1409 | } | |
1410 | ||
c0eb31ed | 1411 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
5ca4e4be | 1412 | struct kernel_lb_addr *fileset) |
1da177e4 LT |
1413 | { |
1414 | struct logicalVolDesc *lvd; | |
1df2ae31 | 1415 | int i, offset; |
1da177e4 | 1416 | uint8_t type; |
6c79e987 | 1417 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1418 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1419 | uint16_t ident; |
1420 | struct buffer_head *bh; | |
adee11b2 | 1421 | unsigned int table_len; |
d759bfa4 | 1422 | int ret; |
1da177e4 | 1423 | |
c0eb31ed JK |
1424 | bh = udf_read_tagged(sb, block, block, &ident); |
1425 | if (!bh) | |
d759bfa4 | 1426 | return -EAGAIN; |
c0eb31ed | 1427 | BUG_ON(ident != TAG_IDENT_LVD); |
1da177e4 | 1428 | lvd = (struct logicalVolDesc *)bh->b_data; |
adee11b2 | 1429 | table_len = le32_to_cpu(lvd->mapTableLength); |
57b9655d | 1430 | if (table_len > sb->s_blocksize - sizeof(*lvd)) { |
adee11b2 JK |
1431 | udf_err(sb, "error loading logical volume descriptor: " |
1432 | "Partition table too long (%u > %lu)\n", table_len, | |
1433 | sb->s_blocksize - sizeof(*lvd)); | |
d759bfa4 | 1434 | ret = -EIO; |
adee11b2 JK |
1435 | goto out_bh; |
1436 | } | |
1da177e4 | 1437 | |
cb14d340 JK |
1438 | ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
1439 | if (ret) | |
c0eb31ed | 1440 | goto out_bh; |
1da177e4 | 1441 | |
cb00ea35 | 1442 | for (i = 0, offset = 0; |
adee11b2 | 1443 | i < sbi->s_partitions && offset < table_len; |
4b11111a MS |
1444 | i++, offset += gpm->partitionMapLength) { |
1445 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1446 | gpm = (struct genericPartitionMap *) | |
1447 | &(lvd->partitionMaps[offset]); | |
1448 | type = gpm->partitionMapType; | |
cb00ea35 | 1449 | if (type == 1) { |
4b11111a MS |
1450 | struct genericPartitionMap1 *gpm1 = |
1451 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1452 | map->s_partition_type = UDF_TYPE1_MAP15; |
1453 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1454 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1455 | map->s_partition_func = NULL; | |
cb00ea35 | 1456 | } else if (type == 2) { |
4b11111a MS |
1457 | struct udfPartitionMap2 *upm2 = |
1458 | (struct udfPartitionMap2 *)gpm; | |
1459 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1460 | strlen(UDF_ID_VIRTUAL))) { | |
1461 | u16 suf = | |
1462 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1463 | identSuffix)[0]); | |
c82a1275 | 1464 | if (suf < 0x0200) { |
4b11111a MS |
1465 | map->s_partition_type = |
1466 | UDF_VIRTUAL_MAP15; | |
1467 | map->s_partition_func = | |
1468 | udf_get_pblock_virt15; | |
c82a1275 | 1469 | } else { |
4b11111a MS |
1470 | map->s_partition_type = |
1471 | UDF_VIRTUAL_MAP20; | |
1472 | map->s_partition_func = | |
1473 | udf_get_pblock_virt20; | |
1da177e4 | 1474 | } |
4b11111a MS |
1475 | } else if (!strncmp(upm2->partIdent.ident, |
1476 | UDF_ID_SPARABLE, | |
1477 | strlen(UDF_ID_SPARABLE))) { | |
d759bfa4 JK |
1478 | ret = udf_load_sparable_map(sb, map, |
1479 | (struct sparablePartitionMap *)gpm); | |
1480 | if (ret < 0) | |
1df2ae31 | 1481 | goto out_bh; |
bfb257a5 JK |
1482 | } else if (!strncmp(upm2->partIdent.ident, |
1483 | UDF_ID_METADATA, | |
1484 | strlen(UDF_ID_METADATA))) { | |
1485 | struct udf_meta_data *mdata = | |
1486 | &map->s_type_specific.s_metadata; | |
1487 | struct metadataPartitionMap *mdm = | |
1488 | (struct metadataPartitionMap *) | |
1489 | &(lvd->partitionMaps[offset]); | |
a983f368 JP |
1490 | udf_debug("Parsing Logical vol part %d type %d id=%s\n", |
1491 | i, type, UDF_ID_METADATA); | |
bfb257a5 JK |
1492 | |
1493 | map->s_partition_type = UDF_METADATA_MAP25; | |
1494 | map->s_partition_func = udf_get_pblock_meta25; | |
1495 | ||
1496 | mdata->s_meta_file_loc = | |
1497 | le32_to_cpu(mdm->metadataFileLoc); | |
1498 | mdata->s_mirror_file_loc = | |
1499 | le32_to_cpu(mdm->metadataMirrorFileLoc); | |
1500 | mdata->s_bitmap_file_loc = | |
1501 | le32_to_cpu(mdm->metadataBitmapFileLoc); | |
1502 | mdata->s_alloc_unit_size = | |
1503 | le32_to_cpu(mdm->allocUnitSize); | |
1504 | mdata->s_align_unit_size = | |
1505 | le16_to_cpu(mdm->alignUnitSize); | |
ed47a7d0 JK |
1506 | if (mdm->flags & 0x01) |
1507 | mdata->s_flags |= MF_DUPLICATE_MD; | |
bfb257a5 JK |
1508 | |
1509 | udf_debug("Metadata Ident suffix=0x%x\n", | |
a983f368 JP |
1510 | le16_to_cpu(*(__le16 *) |
1511 | mdm->partIdent.identSuffix)); | |
bfb257a5 | 1512 | udf_debug("Metadata part num=%d\n", |
a983f368 | 1513 | le16_to_cpu(mdm->partitionNum)); |
bfb257a5 | 1514 | udf_debug("Metadata part alloc unit size=%d\n", |
a983f368 | 1515 | le32_to_cpu(mdm->allocUnitSize)); |
bfb257a5 | 1516 | udf_debug("Metadata file loc=%d\n", |
a983f368 | 1517 | le32_to_cpu(mdm->metadataFileLoc)); |
bfb257a5 | 1518 | udf_debug("Mirror file loc=%d\n", |
a983f368 | 1519 | le32_to_cpu(mdm->metadataMirrorFileLoc)); |
bfb257a5 | 1520 | udf_debug("Bitmap file loc=%d\n", |
a983f368 | 1521 | le32_to_cpu(mdm->metadataBitmapFileLoc)); |
ed47a7d0 JK |
1522 | udf_debug("Flags: %d %d\n", |
1523 | mdata->s_flags, mdm->flags); | |
cb00ea35 | 1524 | } else { |
3a71fc5d MS |
1525 | udf_debug("Unknown ident: %s\n", |
1526 | upm2->partIdent.ident); | |
1da177e4 LT |
1527 | continue; |
1528 | } | |
6c79e987 MS |
1529 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1530 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 LT |
1531 | } |
1532 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
a983f368 | 1533 | i, map->s_partition_num, type, map->s_volumeseqnum); |
1da177e4 LT |
1534 | } |
1535 | ||
cb00ea35 | 1536 | if (fileset) { |
5ca4e4be | 1537 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1538 | |
1539 | *fileset = lelb_to_cpu(la->extLocation); | |
a983f368 JP |
1540 | udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n", |
1541 | fileset->logicalBlockNum, | |
28de7948 | 1542 | fileset->partitionReferenceNum); |
1da177e4 LT |
1543 | } |
1544 | if (lvd->integritySeqExt.extLength) | |
1545 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
d759bfa4 | 1546 | ret = 0; |
c0eb31ed JK |
1547 | out_bh: |
1548 | brelse(bh); | |
1549 | return ret; | |
1da177e4 LT |
1550 | } |
1551 | ||
1552 | /* | |
1553 | * udf_load_logicalvolint | |
1554 | * | |
1555 | */ | |
5ca4e4be | 1556 | static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) |
1da177e4 LT |
1557 | { |
1558 | struct buffer_head *bh = NULL; | |
1559 | uint16_t ident; | |
6c79e987 MS |
1560 | struct udf_sb_info *sbi = UDF_SB(sb); |
1561 | struct logicalVolIntegrityDesc *lvid; | |
1da177e4 LT |
1562 | |
1563 | while (loc.extLength > 0 && | |
cb00ea35 CG |
1564 | (bh = udf_read_tagged(sb, loc.extLocation, |
1565 | loc.extLocation, &ident)) && | |
1566 | ident == TAG_IDENT_LVID) { | |
6c79e987 MS |
1567 | sbi->s_lvid_bh = bh; |
1568 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
cb00ea35 | 1569 | |
6c79e987 | 1570 | if (lvid->nextIntegrityExt.extLength) |
3a71fc5d | 1571 | udf_load_logicalvolint(sb, |
6c79e987 | 1572 | leea_to_cpu(lvid->nextIntegrityExt)); |
cb00ea35 | 1573 | |
6c79e987 | 1574 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1575 | brelse(bh); |
1da177e4 | 1576 | loc.extLength -= sb->s_blocksize; |
cb00ea35 | 1577 | loc.extLocation++; |
1da177e4 | 1578 | } |
6c79e987 | 1579 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1580 | brelse(bh); |
1da177e4 LT |
1581 | } |
1582 | ||
1583 | /* | |
d759bfa4 JK |
1584 | * Process a main/reserve volume descriptor sequence. |
1585 | * @block First block of first extent of the sequence. | |
1586 | * @lastblock Lastblock of first extent of the sequence. | |
1587 | * @fileset There we store extent containing root fileset | |
1da177e4 | 1588 | * |
d759bfa4 JK |
1589 | * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor |
1590 | * sequence | |
1da177e4 | 1591 | */ |
d759bfa4 JK |
1592 | static noinline int udf_process_sequence( |
1593 | struct super_block *sb, | |
1594 | sector_t block, sector_t lastblock, | |
1595 | struct kernel_lb_addr *fileset) | |
1da177e4 LT |
1596 | { |
1597 | struct buffer_head *bh = NULL; | |
1598 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
4b11111a | 1599 | struct udf_vds_record *curr; |
1da177e4 LT |
1600 | struct generic_desc *gd; |
1601 | struct volDescPtr *vdp; | |
cb00ea35 | 1602 | int done = 0; |
1da177e4 LT |
1603 | uint32_t vdsn; |
1604 | uint16_t ident; | |
1605 | long next_s = 0, next_e = 0; | |
d759bfa4 | 1606 | int ret; |
1da177e4 LT |
1607 | |
1608 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1609 | ||
c0eb31ed JK |
1610 | /* |
1611 | * Read the main descriptor sequence and find which descriptors | |
1612 | * are in it. | |
1613 | */ | |
cb00ea35 | 1614 | for (; (!done && block <= lastblock); block++) { |
1da177e4 LT |
1615 | |
1616 | bh = udf_read_tagged(sb, block, block, &ident); | |
c0eb31ed | 1617 | if (!bh) { |
78ace70c JP |
1618 | udf_err(sb, |
1619 | "Block %llu of volume descriptor sequence is corrupted or we could not read it\n", | |
1620 | (unsigned long long)block); | |
d759bfa4 | 1621 | return -EAGAIN; |
c0eb31ed | 1622 | } |
1da177e4 LT |
1623 | |
1624 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1625 | gd = (struct generic_desc *)bh->b_data; | |
1626 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1627 | switch (ident) { |
28de7948 | 1628 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
4b11111a MS |
1629 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
1630 | if (vdsn >= curr->volDescSeqNum) { | |
1631 | curr->volDescSeqNum = vdsn; | |
1632 | curr->block = block; | |
cb00ea35 CG |
1633 | } |
1634 | break; | |
28de7948 | 1635 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
4b11111a MS |
1636 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
1637 | if (vdsn >= curr->volDescSeqNum) { | |
1638 | curr->volDescSeqNum = vdsn; | |
1639 | curr->block = block; | |
cb00ea35 CG |
1640 | |
1641 | vdp = (struct volDescPtr *)bh->b_data; | |
4b11111a MS |
1642 | next_s = le32_to_cpu( |
1643 | vdp->nextVolDescSeqExt.extLocation); | |
1644 | next_e = le32_to_cpu( | |
1645 | vdp->nextVolDescSeqExt.extLength); | |
cb00ea35 CG |
1646 | next_e = next_e >> sb->s_blocksize_bits; |
1647 | next_e += next_s; | |
1648 | } | |
1649 | break; | |
28de7948 | 1650 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
4b11111a MS |
1651 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
1652 | if (vdsn >= curr->volDescSeqNum) { | |
1653 | curr->volDescSeqNum = vdsn; | |
1654 | curr->block = block; | |
cb00ea35 CG |
1655 | } |
1656 | break; | |
28de7948 | 1657 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
4b11111a MS |
1658 | curr = &vds[VDS_POS_PARTITION_DESC]; |
1659 | if (!curr->block) | |
1660 | curr->block = block; | |
cb00ea35 | 1661 | break; |
28de7948 | 1662 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
4b11111a MS |
1663 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
1664 | if (vdsn >= curr->volDescSeqNum) { | |
1665 | curr->volDescSeqNum = vdsn; | |
1666 | curr->block = block; | |
cb00ea35 CG |
1667 | } |
1668 | break; | |
28de7948 | 1669 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
4b11111a MS |
1670 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
1671 | if (vdsn >= curr->volDescSeqNum) { | |
1672 | curr->volDescSeqNum = vdsn; | |
1673 | curr->block = block; | |
cb00ea35 CG |
1674 | } |
1675 | break; | |
28de7948 | 1676 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
cb00ea35 CG |
1677 | vds[VDS_POS_TERMINATING_DESC].block = block; |
1678 | if (next_e) { | |
1679 | block = next_s; | |
1680 | lastblock = next_e; | |
1681 | next_s = next_e = 0; | |
4b11111a | 1682 | } else |
cb00ea35 CG |
1683 | done = 1; |
1684 | break; | |
1da177e4 | 1685 | } |
3bf25cb4 | 1686 | brelse(bh); |
1da177e4 | 1687 | } |
c0eb31ed JK |
1688 | /* |
1689 | * Now read interesting descriptors again and process them | |
1690 | * in a suitable order | |
1691 | */ | |
1692 | if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { | |
78ace70c | 1693 | udf_err(sb, "Primary Volume Descriptor not found!\n"); |
d759bfa4 JK |
1694 | return -EAGAIN; |
1695 | } | |
1696 | ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block); | |
1697 | if (ret < 0) | |
1698 | return ret; | |
1699 | ||
1700 | if (vds[VDS_POS_LOGICAL_VOL_DESC].block) { | |
1701 | ret = udf_load_logicalvol(sb, | |
1702 | vds[VDS_POS_LOGICAL_VOL_DESC].block, | |
1703 | fileset); | |
1704 | if (ret < 0) | |
1705 | return ret; | |
c0eb31ed | 1706 | } |
165923fa | 1707 | |
c0eb31ed JK |
1708 | if (vds[VDS_POS_PARTITION_DESC].block) { |
1709 | /* | |
1710 | * We rescan the whole descriptor sequence to find | |
1711 | * partition descriptor blocks and process them. | |
1712 | */ | |
1713 | for (block = vds[VDS_POS_PARTITION_DESC].block; | |
1714 | block < vds[VDS_POS_TERMINATING_DESC].block; | |
d759bfa4 JK |
1715 | block++) { |
1716 | ret = udf_load_partdesc(sb, block); | |
1717 | if (ret < 0) | |
1718 | return ret; | |
1719 | } | |
1da177e4 LT |
1720 | } |
1721 | ||
1722 | return 0; | |
1723 | } | |
1724 | ||
d759bfa4 JK |
1725 | /* |
1726 | * Load Volume Descriptor Sequence described by anchor in bh | |
1727 | * | |
1728 | * Returns <0 on error, 0 on success | |
1729 | */ | |
40346005 JK |
1730 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, |
1731 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1732 | { |
40346005 | 1733 | struct anchorVolDescPtr *anchor; |
d759bfa4 JK |
1734 | sector_t main_s, main_e, reserve_s, reserve_e; |
1735 | int ret; | |
1da177e4 | 1736 | |
40346005 JK |
1737 | anchor = (struct anchorVolDescPtr *)bh->b_data; |
1738 | ||
1739 | /* Locate the main sequence */ | |
1740 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1741 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1742 | main_e = main_e >> sb->s_blocksize_bits; | |
1743 | main_e += main_s; | |
1744 | ||
1745 | /* Locate the reserve sequence */ | |
1746 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); | |
1747 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); | |
1748 | reserve_e = reserve_e >> sb->s_blocksize_bits; | |
1749 | reserve_e += reserve_s; | |
1750 | ||
1751 | /* Process the main & reserve sequences */ | |
1752 | /* responsible for finding the PartitionDesc(s) */ | |
d759bfa4 JK |
1753 | ret = udf_process_sequence(sb, main_s, main_e, fileset); |
1754 | if (ret != -EAGAIN) | |
1755 | return ret; | |
bff943af | 1756 | udf_sb_free_partitions(sb); |
d759bfa4 JK |
1757 | ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset); |
1758 | if (ret < 0) { | |
1759 | udf_sb_free_partitions(sb); | |
1760 | /* No sequence was OK, return -EIO */ | |
1761 | if (ret == -EAGAIN) | |
1762 | ret = -EIO; | |
1763 | } | |
1764 | return ret; | |
1da177e4 LT |
1765 | } |
1766 | ||
40346005 JK |
1767 | /* |
1768 | * Check whether there is an anchor block in the given block and | |
1769 | * load Volume Descriptor Sequence if so. | |
d759bfa4 JK |
1770 | * |
1771 | * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor | |
1772 | * block | |
40346005 JK |
1773 | */ |
1774 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, | |
1775 | struct kernel_lb_addr *fileset) | |
1197e4df | 1776 | { |
40346005 JK |
1777 | struct buffer_head *bh; |
1778 | uint16_t ident; | |
1779 | int ret; | |
1197e4df | 1780 | |
40346005 JK |
1781 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
1782 | udf_fixed_to_variable(block) >= | |
1783 | sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) | |
d759bfa4 | 1784 | return -EAGAIN; |
40346005 JK |
1785 | |
1786 | bh = udf_read_tagged(sb, block, block, &ident); | |
1787 | if (!bh) | |
d759bfa4 | 1788 | return -EAGAIN; |
40346005 JK |
1789 | if (ident != TAG_IDENT_AVDP) { |
1790 | brelse(bh); | |
d759bfa4 | 1791 | return -EAGAIN; |
1197e4df | 1792 | } |
40346005 JK |
1793 | ret = udf_load_sequence(sb, bh, fileset); |
1794 | brelse(bh); | |
1795 | return ret; | |
1197e4df CL |
1796 | } |
1797 | ||
d759bfa4 JK |
1798 | /* |
1799 | * Search for an anchor volume descriptor pointer. | |
1800 | * | |
1801 | * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set | |
1802 | * of anchors. | |
1803 | */ | |
1804 | static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock, | |
1805 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1806 | { |
40346005 | 1807 | sector_t last[6]; |
38b74a53 | 1808 | int i; |
40346005 JK |
1809 | struct udf_sb_info *sbi = UDF_SB(sb); |
1810 | int last_count = 0; | |
d759bfa4 | 1811 | int ret; |
1da177e4 | 1812 | |
40346005 JK |
1813 | /* First try user provided anchor */ |
1814 | if (sbi->s_anchor) { | |
d759bfa4 JK |
1815 | ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset); |
1816 | if (ret != -EAGAIN) | |
1817 | return ret; | |
40346005 JK |
1818 | } |
1819 | /* | |
1820 | * according to spec, anchor is in either: | |
1821 | * block 256 | |
1822 | * lastblock-256 | |
1823 | * lastblock | |
1824 | * however, if the disc isn't closed, it could be 512. | |
1825 | */ | |
d759bfa4 JK |
1826 | ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset); |
1827 | if (ret != -EAGAIN) | |
1828 | return ret; | |
40346005 JK |
1829 | /* |
1830 | * The trouble is which block is the last one. Drives often misreport | |
1831 | * this so we try various possibilities. | |
1832 | */ | |
d759bfa4 JK |
1833 | last[last_count++] = *lastblock; |
1834 | if (*lastblock >= 1) | |
1835 | last[last_count++] = *lastblock - 1; | |
1836 | last[last_count++] = *lastblock + 1; | |
1837 | if (*lastblock >= 2) | |
1838 | last[last_count++] = *lastblock - 2; | |
1839 | if (*lastblock >= 150) | |
1840 | last[last_count++] = *lastblock - 150; | |
1841 | if (*lastblock >= 152) | |
1842 | last[last_count++] = *lastblock - 152; | |
1da177e4 | 1843 | |
40346005 JK |
1844 | for (i = 0; i < last_count; i++) { |
1845 | if (last[i] >= sb->s_bdev->bd_inode->i_size >> | |
1846 | sb->s_blocksize_bits) | |
28f7c4d4 | 1847 | continue; |
d759bfa4 JK |
1848 | ret = udf_check_anchor_block(sb, last[i], fileset); |
1849 | if (ret != -EAGAIN) { | |
1850 | if (!ret) | |
1851 | *lastblock = last[i]; | |
1852 | return ret; | |
1853 | } | |
40346005 | 1854 | if (last[i] < 256) |
28f7c4d4 | 1855 | continue; |
d759bfa4 JK |
1856 | ret = udf_check_anchor_block(sb, last[i] - 256, fileset); |
1857 | if (ret != -EAGAIN) { | |
1858 | if (!ret) | |
1859 | *lastblock = last[i]; | |
1860 | return ret; | |
1861 | } | |
40346005 | 1862 | } |
28f7c4d4 | 1863 | |
40346005 | 1864 | /* Finally try block 512 in case media is open */ |
d759bfa4 | 1865 | return udf_check_anchor_block(sb, sbi->s_session + 512, fileset); |
40346005 | 1866 | } |
28f7c4d4 | 1867 | |
40346005 JK |
1868 | /* |
1869 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from | |
1870 | * area specified by it. The function expects sbi->s_lastblock to be the last | |
1871 | * block on the media. | |
1872 | * | |
d759bfa4 JK |
1873 | * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor |
1874 | * was not found. | |
40346005 JK |
1875 | */ |
1876 | static int udf_find_anchor(struct super_block *sb, | |
1877 | struct kernel_lb_addr *fileset) | |
1878 | { | |
40346005 | 1879 | struct udf_sb_info *sbi = UDF_SB(sb); |
d759bfa4 JK |
1880 | sector_t lastblock = sbi->s_last_block; |
1881 | int ret; | |
28f7c4d4 | 1882 | |
d759bfa4 JK |
1883 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1884 | if (ret != -EAGAIN) | |
40346005 | 1885 | goto out; |
1da177e4 | 1886 | |
40346005 JK |
1887 | /* No anchor found? Try VARCONV conversion of block numbers */ |
1888 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
d759bfa4 | 1889 | lastblock = udf_variable_to_fixed(sbi->s_last_block); |
40346005 | 1890 | /* Firstly, we try to not convert number of the last block */ |
d759bfa4 JK |
1891 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1892 | if (ret != -EAGAIN) | |
40346005 | 1893 | goto out; |
1da177e4 | 1894 | |
d759bfa4 | 1895 | lastblock = sbi->s_last_block; |
40346005 | 1896 | /* Secondly, we try with converted number of the last block */ |
d759bfa4 JK |
1897 | ret = udf_scan_anchors(sb, &lastblock, fileset); |
1898 | if (ret < 0) { | |
40346005 JK |
1899 | /* VARCONV didn't help. Clear it. */ |
1900 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); | |
1da177e4 | 1901 | } |
40346005 | 1902 | out: |
d759bfa4 JK |
1903 | if (ret == 0) |
1904 | sbi->s_last_block = lastblock; | |
1905 | return ret; | |
40346005 | 1906 | } |
1da177e4 | 1907 | |
40346005 JK |
1908 | /* |
1909 | * Check Volume Structure Descriptor, find Anchor block and load Volume | |
d759bfa4 JK |
1910 | * Descriptor Sequence. |
1911 | * | |
1912 | * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor | |
1913 | * block was not found. | |
40346005 JK |
1914 | */ |
1915 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, | |
1916 | int silent, struct kernel_lb_addr *fileset) | |
1917 | { | |
1918 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1919 | loff_t nsr_off; | |
d759bfa4 | 1920 | int ret; |
40346005 JK |
1921 | |
1922 | if (!sb_set_blocksize(sb, uopt->blocksize)) { | |
1923 | if (!silent) | |
78ace70c | 1924 | udf_warn(sb, "Bad block size\n"); |
d759bfa4 | 1925 | return -EINVAL; |
40346005 JK |
1926 | } |
1927 | sbi->s_last_block = uopt->lastblock; | |
1928 | if (!uopt->novrs) { | |
1929 | /* Check that it is NSR02 compliant */ | |
1930 | nsr_off = udf_check_vsd(sb); | |
1931 | if (!nsr_off) { | |
1932 | if (!silent) | |
78ace70c | 1933 | udf_warn(sb, "No VRS found\n"); |
40346005 JK |
1934 | return 0; |
1935 | } | |
1936 | if (nsr_off == -1) | |
44499602 PF |
1937 | udf_debug("Failed to read sector at offset %d. " |
1938 | "Assuming open disc. Skipping validity " | |
1939 | "check\n", VSD_FIRST_SECTOR_OFFSET); | |
40346005 JK |
1940 | if (!sbi->s_last_block) |
1941 | sbi->s_last_block = udf_get_last_block(sb); | |
1942 | } else { | |
1943 | udf_debug("Validity check skipped because of novrs option\n"); | |
28f7c4d4 | 1944 | } |
1da177e4 | 1945 | |
40346005 JK |
1946 | /* Look for anchor block and load Volume Descriptor Sequence */ |
1947 | sbi->s_anchor = uopt->anchor; | |
d759bfa4 JK |
1948 | ret = udf_find_anchor(sb, fileset); |
1949 | if (ret < 0) { | |
1950 | if (!silent && ret == -EAGAIN) | |
78ace70c | 1951 | udf_warn(sb, "No anchor found\n"); |
d759bfa4 | 1952 | return ret; |
40346005 | 1953 | } |
d759bfa4 | 1954 | return 0; |
1da177e4 LT |
1955 | } |
1956 | ||
1957 | static void udf_open_lvid(struct super_block *sb) | |
1958 | { | |
6c79e987 MS |
1959 | struct udf_sb_info *sbi = UDF_SB(sb); |
1960 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
1961 | struct logicalVolIntegrityDesc *lvid; |
1962 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
146bca72 | 1963 | |
165923fa MS |
1964 | if (!bh) |
1965 | return; | |
165923fa | 1966 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
69d75671 JK |
1967 | lvidiu = udf_sb_lvidiu(sb); |
1968 | if (!lvidiu) | |
1969 | return; | |
165923fa | 1970 | |
69d75671 | 1971 | mutex_lock(&sbi->s_alloc_mutex); |
165923fa MS |
1972 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
1973 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1974 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, | |
1975 | CURRENT_TIME); | |
146bca72 | 1976 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); |
165923fa MS |
1977 | |
1978 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1979 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 1980 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
1981 | |
1982 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1983 | mark_buffer_dirty(bh); | |
146bca72 | 1984 | sbi->s_lvid_dirty = 0; |
949f4a7c | 1985 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
1986 | /* Make opening of filesystem visible on the media immediately */ |
1987 | sync_dirty_buffer(bh); | |
1da177e4 LT |
1988 | } |
1989 | ||
1990 | static void udf_close_lvid(struct super_block *sb) | |
1991 | { | |
6c79e987 MS |
1992 | struct udf_sb_info *sbi = UDF_SB(sb); |
1993 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1994 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 1995 | struct logicalVolIntegrityDescImpUse *lvidiu; |
28de7948 | 1996 | |
6c79e987 MS |
1997 | if (!bh) |
1998 | return; | |
69d75671 JK |
1999 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
2000 | lvidiu = udf_sb_lvidiu(sb); | |
2001 | if (!lvidiu) | |
2002 | return; | |
6c79e987 | 2003 | |
949f4a7c | 2004 | mutex_lock(&sbi->s_alloc_mutex); |
165923fa MS |
2005 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
2006 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
2007 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); | |
2008 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) | |
2009 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
2010 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
2011 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
2012 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
2013 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
2014 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
2015 | ||
2016 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 2017 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 2018 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
2019 | |
2020 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
853a0c25 JK |
2021 | /* |
2022 | * We set buffer uptodate unconditionally here to avoid spurious | |
2023 | * warnings from mark_buffer_dirty() when previous EIO has marked | |
2024 | * the buffer as !uptodate | |
2025 | */ | |
2026 | set_buffer_uptodate(bh); | |
165923fa | 2027 | mark_buffer_dirty(bh); |
146bca72 | 2028 | sbi->s_lvid_dirty = 0; |
949f4a7c | 2029 | mutex_unlock(&sbi->s_alloc_mutex); |
9734c971 JK |
2030 | /* Make closing of filesystem visible on the media immediately */ |
2031 | sync_dirty_buffer(bh); | |
1da177e4 LT |
2032 | } |
2033 | ||
d664b6af JK |
2034 | u64 lvid_get_unique_id(struct super_block *sb) |
2035 | { | |
2036 | struct buffer_head *bh; | |
2037 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2038 | struct logicalVolIntegrityDesc *lvid; | |
2039 | struct logicalVolHeaderDesc *lvhd; | |
2040 | u64 uniqueID; | |
2041 | u64 ret; | |
2042 | ||
2043 | bh = sbi->s_lvid_bh; | |
2044 | if (!bh) | |
2045 | return 0; | |
2046 | ||
2047 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
2048 | lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; | |
2049 | ||
2050 | mutex_lock(&sbi->s_alloc_mutex); | |
2051 | ret = uniqueID = le64_to_cpu(lvhd->uniqueID); | |
2052 | if (!(++uniqueID & 0xFFFFFFFF)) | |
2053 | uniqueID += 16; | |
2054 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
2055 | mutex_unlock(&sbi->s_alloc_mutex); | |
2056 | mark_buffer_dirty(bh); | |
2057 | ||
2058 | return ret; | |
1da177e4 LT |
2059 | } |
2060 | ||
1da177e4 LT |
2061 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
2062 | { | |
d759bfa4 | 2063 | int ret = -EINVAL; |
cb00ea35 | 2064 | struct inode *inode = NULL; |
1da177e4 | 2065 | struct udf_options uopt; |
5ca4e4be | 2066 | struct kernel_lb_addr rootdir, fileset; |
1da177e4 LT |
2067 | struct udf_sb_info *sbi; |
2068 | ||
2069 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
c2ba138a EB |
2070 | uopt.uid = INVALID_UID; |
2071 | uopt.gid = INVALID_GID; | |
1da177e4 | 2072 | uopt.umask = 0; |
87bc730c MS |
2073 | uopt.fmode = UDF_INVALID_MODE; |
2074 | uopt.dmode = UDF_INVALID_MODE; | |
1da177e4 | 2075 | |
6c79e987 | 2076 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
9db9f9e3 | 2077 | if (!sbi) |
1da177e4 | 2078 | return -ENOMEM; |
28de7948 | 2079 | |
1da177e4 | 2080 | sb->s_fs_info = sbi; |
1da177e4 | 2081 | |
1e7933de | 2082 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 2083 | |
6da80894 | 2084 | if (!udf_parse_options((char *)options, &uopt, false)) |
1da177e4 LT |
2085 | goto error_out; |
2086 | ||
2087 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 2088 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
8076c363 | 2089 | udf_err(sb, "utf8 cannot be combined with iocharset\n"); |
1da177e4 LT |
2090 | goto error_out; |
2091 | } | |
2092 | #ifdef CONFIG_UDF_NLS | |
cb00ea35 | 2093 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
2094 | uopt.nls_map = load_nls_default(); |
2095 | if (!uopt.nls_map) | |
2096 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
2097 | else | |
2098 | udf_debug("Using default NLS map\n"); | |
2099 | } | |
2100 | #endif | |
2101 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
2102 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
2103 | ||
2104 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
2105 | fileset.partitionReferenceNum = 0xFFFF; | |
2106 | ||
6c79e987 MS |
2107 | sbi->s_flags = uopt.flags; |
2108 | sbi->s_uid = uopt.uid; | |
2109 | sbi->s_gid = uopt.gid; | |
2110 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
2111 | sbi->s_fmode = uopt.fmode; |
2112 | sbi->s_dmode = uopt.dmode; | |
6c79e987 | 2113 | sbi->s_nls_map = uopt.nls_map; |
c03cad24 | 2114 | rwlock_init(&sbi->s_cred_lock); |
1da177e4 | 2115 | |
cb00ea35 | 2116 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 2117 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 2118 | else |
6c79e987 | 2119 | sbi->s_session = uopt.session; |
1da177e4 | 2120 | |
6c79e987 | 2121 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 2122 | |
40346005 JK |
2123 | /* Fill in the rest of the superblock */ |
2124 | sb->s_op = &udf_sb_ops; | |
2125 | sb->s_export_op = &udf_export_ops; | |
123e9caf | 2126 | |
40346005 JK |
2127 | sb->s_magic = UDF_SUPER_MAGIC; |
2128 | sb->s_time_gran = 1000; | |
2129 | ||
1197e4df | 2130 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { |
40346005 | 2131 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 2132 | } else { |
e1defc4f | 2133 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); |
40346005 | 2134 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
d759bfa4 | 2135 | if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { |
1197e4df | 2136 | if (!silent) |
78ace70c JP |
2137 | pr_notice("Rescanning with blocksize %d\n", |
2138 | UDF_DEFAULT_BLOCKSIZE); | |
dc141a40 AS |
2139 | brelse(sbi->s_lvid_bh); |
2140 | sbi->s_lvid_bh = NULL; | |
1197e4df | 2141 | uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; |
40346005 | 2142 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 2143 | } |
1da177e4 | 2144 | } |
d759bfa4 JK |
2145 | if (ret < 0) { |
2146 | if (ret == -EAGAIN) { | |
2147 | udf_warn(sb, "No partition found (1)\n"); | |
2148 | ret = -EINVAL; | |
2149 | } | |
1da177e4 LT |
2150 | goto error_out; |
2151 | } | |
2152 | ||
6c79e987 | 2153 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
1da177e4 | 2154 | |
6c79e987 | 2155 | if (sbi->s_lvid_bh) { |
4b11111a | 2156 | struct logicalVolIntegrityDescImpUse *lvidiu = |
69d75671 JK |
2157 | udf_sb_lvidiu(sb); |
2158 | uint16_t minUDFReadRev; | |
2159 | uint16_t minUDFWriteRev; | |
1da177e4 | 2160 | |
69d75671 JK |
2161 | if (!lvidiu) { |
2162 | ret = -EINVAL; | |
2163 | goto error_out; | |
2164 | } | |
2165 | minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); | |
2166 | minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
cb00ea35 | 2167 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
78ace70c | 2168 | udf_err(sb, "minUDFReadRev=%x (max is %x)\n", |
69d75671 | 2169 | minUDFReadRev, |
78ace70c | 2170 | UDF_MAX_READ_VERSION); |
d759bfa4 | 2171 | ret = -EINVAL; |
1da177e4 | 2172 | goto error_out; |
e729eac6 JK |
2173 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION && |
2174 | !(sb->s_flags & MS_RDONLY)) { | |
2175 | ret = -EACCES; | |
2176 | goto error_out; | |
2177 | } | |
1da177e4 | 2178 | |
6c79e987 | 2179 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
2180 | |
2181 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
2182 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
2183 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
2184 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
2185 | } | |
2186 | ||
6c79e987 | 2187 | if (!sbi->s_partitions) { |
78ace70c | 2188 | udf_warn(sb, "No partition found (2)\n"); |
d759bfa4 | 2189 | ret = -EINVAL; |
1da177e4 LT |
2190 | goto error_out; |
2191 | } | |
2192 | ||
4b11111a | 2193 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
e729eac6 JK |
2194 | UDF_PART_FLAG_READ_ONLY && |
2195 | !(sb->s_flags & MS_RDONLY)) { | |
2196 | ret = -EACCES; | |
2197 | goto error_out; | |
c1a26e7d | 2198 | } |
39b3f6d6 | 2199 | |
cb00ea35 | 2200 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
78ace70c | 2201 | udf_warn(sb, "No fileset found\n"); |
d759bfa4 | 2202 | ret = -EINVAL; |
1da177e4 LT |
2203 | goto error_out; |
2204 | } | |
2205 | ||
cb00ea35 | 2206 | if (!silent) { |
5ca4e4be | 2207 | struct timestamp ts; |
56774805 | 2208 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); |
78ace70c JP |
2209 | udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
2210 | sbi->s_volume_ident, | |
2211 | le16_to_cpu(ts.year), ts.month, ts.day, | |
56774805 | 2212 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); |
1da177e4 LT |
2213 | } |
2214 | if (!(sb->s_flags & MS_RDONLY)) | |
2215 | udf_open_lvid(sb); | |
2216 | ||
2217 | /* Assign the root inode */ | |
2218 | /* assign inodes by physical block number */ | |
2219 | /* perhaps it's not extensible enough, but for now ... */ | |
97e961fd | 2220 | inode = udf_iget(sb, &rootdir); |
6d3d5e86 | 2221 | if (IS_ERR(inode)) { |
78ace70c | 2222 | udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n", |
cb00ea35 | 2223 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
6d3d5e86 | 2224 | ret = PTR_ERR(inode); |
1da177e4 LT |
2225 | goto error_out; |
2226 | } | |
2227 | ||
2228 | /* Allocate a dentry for the root inode */ | |
48fde701 | 2229 | sb->s_root = d_make_root(inode); |
cb00ea35 | 2230 | if (!sb->s_root) { |
78ace70c | 2231 | udf_err(sb, "Couldn't allocate root dentry\n"); |
d759bfa4 | 2232 | ret = -ENOMEM; |
1da177e4 LT |
2233 | goto error_out; |
2234 | } | |
31170b6a | 2235 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
8de52778 | 2236 | sb->s_max_links = UDF_MAX_LINKS; |
1da177e4 LT |
2237 | return 0; |
2238 | ||
28de7948 | 2239 | error_out: |
6c79e987 MS |
2240 | if (sbi->s_vat_inode) |
2241 | iput(sbi->s_vat_inode); | |
1da177e4 LT |
2242 | #ifdef CONFIG_UDF_NLS |
2243 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2244 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2245 | #endif |
2246 | if (!(sb->s_flags & MS_RDONLY)) | |
2247 | udf_close_lvid(sb); | |
6c79e987 | 2248 | brelse(sbi->s_lvid_bh); |
bff943af | 2249 | udf_sb_free_partitions(sb); |
1da177e4 LT |
2250 | kfree(sbi); |
2251 | sb->s_fs_info = NULL; | |
28de7948 | 2252 | |
d759bfa4 | 2253 | return ret; |
1da177e4 LT |
2254 | } |
2255 | ||
8076c363 JP |
2256 | void _udf_err(struct super_block *sb, const char *function, |
2257 | const char *fmt, ...) | |
1da177e4 | 2258 | { |
c2bff36c | 2259 | struct va_format vaf; |
1da177e4 LT |
2260 | va_list args; |
2261 | ||
1da177e4 | 2262 | va_start(args, fmt); |
c2bff36c JP |
2263 | |
2264 | vaf.fmt = fmt; | |
2265 | vaf.va = &args; | |
2266 | ||
2267 | pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2268 | ||
1da177e4 | 2269 | va_end(args); |
1da177e4 LT |
2270 | } |
2271 | ||
a40ecd7b JP |
2272 | void _udf_warn(struct super_block *sb, const char *function, |
2273 | const char *fmt, ...) | |
1da177e4 | 2274 | { |
c2bff36c | 2275 | struct va_format vaf; |
1da177e4 LT |
2276 | va_list args; |
2277 | ||
cb00ea35 | 2278 | va_start(args, fmt); |
c2bff36c JP |
2279 | |
2280 | vaf.fmt = fmt; | |
2281 | vaf.va = &args; | |
2282 | ||
2283 | pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2284 | ||
1da177e4 | 2285 | va_end(args); |
1da177e4 LT |
2286 | } |
2287 | ||
cb00ea35 | 2288 | static void udf_put_super(struct super_block *sb) |
1da177e4 | 2289 | { |
6c79e987 | 2290 | struct udf_sb_info *sbi; |
1da177e4 | 2291 | |
6c79e987 | 2292 | sbi = UDF_SB(sb); |
6cfd0148 | 2293 | |
6c79e987 MS |
2294 | if (sbi->s_vat_inode) |
2295 | iput(sbi->s_vat_inode); | |
1da177e4 LT |
2296 | #ifdef CONFIG_UDF_NLS |
2297 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2298 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2299 | #endif |
2300 | if (!(sb->s_flags & MS_RDONLY)) | |
2301 | udf_close_lvid(sb); | |
6c79e987 | 2302 | brelse(sbi->s_lvid_bh); |
bff943af | 2303 | udf_sb_free_partitions(sb); |
1da177e4 LT |
2304 | kfree(sb->s_fs_info); |
2305 | sb->s_fs_info = NULL; | |
2306 | } | |
2307 | ||
146bca72 JK |
2308 | static int udf_sync_fs(struct super_block *sb, int wait) |
2309 | { | |
2310 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2311 | ||
2312 | mutex_lock(&sbi->s_alloc_mutex); | |
2313 | if (sbi->s_lvid_dirty) { | |
2314 | /* | |
2315 | * Blockdevice will be synced later so we don't have to submit | |
2316 | * the buffer for IO | |
2317 | */ | |
2318 | mark_buffer_dirty(sbi->s_lvid_bh); | |
146bca72 JK |
2319 | sbi->s_lvid_dirty = 0; |
2320 | } | |
2321 | mutex_unlock(&sbi->s_alloc_mutex); | |
2322 | ||
2323 | return 0; | |
2324 | } | |
2325 | ||
cb00ea35 | 2326 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2327 | { |
726c3342 | 2328 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
2329 | struct udf_sb_info *sbi = UDF_SB(sb); |
2330 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
557f5a14 | 2331 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
6c79e987 | 2332 | |
69d75671 | 2333 | lvidiu = udf_sb_lvidiu(sb); |
1da177e4 LT |
2334 | buf->f_type = UDF_SUPER_MAGIC; |
2335 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 2336 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
2337 | buf->f_bfree = udf_count_free(sb); |
2338 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
2339 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
2340 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
2341 | + buf->f_bfree; | |
1da177e4 | 2342 | buf->f_ffree = buf->f_bfree; |
cb00ea35 | 2343 | buf->f_namelen = UDF_NAME_LEN - 2; |
557f5a14 CL |
2344 | buf->f_fsid.val[0] = (u32)id; |
2345 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
2346 | |
2347 | return 0; | |
2348 | } | |
2349 | ||
4b11111a MS |
2350 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
2351 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
2352 | { |
2353 | struct buffer_head *bh = NULL; | |
2354 | unsigned int accum = 0; | |
2355 | int index; | |
2356 | int block = 0, newblock; | |
5ca4e4be | 2357 | struct kernel_lb_addr loc; |
1da177e4 | 2358 | uint32_t bytes; |
1da177e4 LT |
2359 | uint8_t *ptr; |
2360 | uint16_t ident; | |
2361 | struct spaceBitmapDesc *bm; | |
2362 | ||
1da177e4 | 2363 | loc.logicalBlockNum = bitmap->s_extPosition; |
6c79e987 | 2364 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
97e961fd | 2365 | bh = udf_read_ptagged(sb, &loc, 0, &ident); |
1da177e4 | 2366 | |
cb00ea35 | 2367 | if (!bh) { |
78ace70c | 2368 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 | 2369 | goto out; |
cb00ea35 | 2370 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 2371 | brelse(bh); |
78ace70c | 2372 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 LT |
2373 | goto out; |
2374 | } | |
2375 | ||
2376 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2377 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
2378 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
2379 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 2380 | |
cb00ea35 | 2381 | while (bytes > 0) { |
01b954a3 MS |
2382 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
2383 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2384 | cur_bytes * 8); | |
2385 | bytes -= cur_bytes; | |
cb00ea35 | 2386 | if (bytes) { |
3bf25cb4 | 2387 | brelse(bh); |
97e961fd | 2388 | newblock = udf_get_lb_pblock(sb, &loc, ++block); |
1da177e4 | 2389 | bh = udf_tread(sb, newblock); |
cb00ea35 | 2390 | if (!bh) { |
1da177e4 LT |
2391 | udf_debug("read failed\n"); |
2392 | goto out; | |
2393 | } | |
2394 | index = 0; | |
28de7948 | 2395 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2396 | } |
2397 | } | |
3bf25cb4 | 2398 | brelse(bh); |
28de7948 | 2399 | out: |
1da177e4 LT |
2400 | return accum; |
2401 | } | |
2402 | ||
4b11111a MS |
2403 | static unsigned int udf_count_free_table(struct super_block *sb, |
2404 | struct inode *table) | |
1da177e4 LT |
2405 | { |
2406 | unsigned int accum = 0; | |
ff116fc8 | 2407 | uint32_t elen; |
5ca4e4be | 2408 | struct kernel_lb_addr eloc; |
1da177e4 | 2409 | int8_t etype; |
ff116fc8 | 2410 | struct extent_position epos; |
1da177e4 | 2411 | |
d1668fe3 | 2412 | mutex_lock(&UDF_SB(sb)->s_alloc_mutex); |
c0b34438 | 2413 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2414 | epos.offset = sizeof(struct unallocSpaceEntry); |
2415 | epos.bh = NULL; | |
1da177e4 | 2416 | |
3a71fc5d | 2417 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2418 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2419 | |
3bf25cb4 | 2420 | brelse(epos.bh); |
d1668fe3 | 2421 | mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); |
1da177e4 LT |
2422 | |
2423 | return accum; | |
2424 | } | |
cb00ea35 CG |
2425 | |
2426 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2427 | { |
2428 | unsigned int accum = 0; | |
6c79e987 MS |
2429 | struct udf_sb_info *sbi; |
2430 | struct udf_part_map *map; | |
1da177e4 | 2431 | |
6c79e987 MS |
2432 | sbi = UDF_SB(sb); |
2433 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2434 | struct logicalVolIntegrityDesc *lvid = |
2435 | (struct logicalVolIntegrityDesc *) | |
2436 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2437 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2438 | accum = le32_to_cpu( |
2439 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2440 | if (accum == 0xFFFFFFFF) |
2441 | accum = 0; | |
2442 | } | |
2443 | } | |
2444 | ||
2445 | if (accum) | |
2446 | return accum; | |
2447 | ||
6c79e987 MS |
2448 | map = &sbi->s_partmaps[sbi->s_partition]; |
2449 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2450 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2451 | map->s_uspace.s_bitmap); |
1da177e4 | 2452 | } |
6c79e987 | 2453 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
28de7948 | 2454 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2455 | map->s_fspace.s_bitmap); |
1da177e4 LT |
2456 | } |
2457 | if (accum) | |
2458 | return accum; | |
2459 | ||
6c79e987 | 2460 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2461 | accum += udf_count_free_table(sb, |
6c79e987 | 2462 | map->s_uspace.s_table); |
1da177e4 | 2463 | } |
6c79e987 | 2464 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
28de7948 | 2465 | accum += udf_count_free_table(sb, |
6c79e987 | 2466 | map->s_fspace.s_table); |
1da177e4 LT |
2467 | } |
2468 | ||
2469 | return accum; | |
2470 | } |