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> | |
66 | #include <asm/uaccess.h> | |
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 | ||
8de52778 AV |
79 | enum { UDF_MAX_LINKS = 0xffff }; |
80 | ||
1da177e4 LT |
81 | /* These are the "meat" - everything else is stuffing */ |
82 | static int udf_fill_super(struct super_block *, void *, int); | |
83 | static void udf_put_super(struct super_block *); | |
146bca72 | 84 | static int udf_sync_fs(struct super_block *, int); |
1da177e4 | 85 | static int udf_remount_fs(struct super_block *, int *, char *); |
5ca4e4be | 86 | static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); |
5ca4e4be PE |
87 | static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, |
88 | struct kernel_lb_addr *); | |
cb00ea35 | 89 | static void udf_load_fileset(struct super_block *, struct buffer_head *, |
5ca4e4be | 90 | struct kernel_lb_addr *); |
1da177e4 LT |
91 | static void udf_open_lvid(struct super_block *); |
92 | static void udf_close_lvid(struct super_block *); | |
93 | static unsigned int udf_count_free(struct super_block *); | |
726c3342 | 94 | static int udf_statfs(struct dentry *, struct kstatfs *); |
34c80b1d | 95 | static int udf_show_options(struct seq_file *, struct dentry *); |
1da177e4 | 96 | |
6c79e987 MS |
97 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) |
98 | { | |
4b11111a MS |
99 | struct logicalVolIntegrityDesc *lvid = |
100 | (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; | |
6c79e987 | 101 | __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); |
4b11111a MS |
102 | __u32 offset = number_of_partitions * 2 * |
103 | sizeof(uint32_t)/sizeof(uint8_t); | |
6c79e987 MS |
104 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
105 | } | |
106 | ||
1da177e4 | 107 | /* UDF filesystem type */ |
152a0836 AV |
108 | static struct dentry *udf_mount(struct file_system_type *fs_type, |
109 | int flags, const char *dev_name, void *data) | |
1da177e4 | 110 | { |
152a0836 | 111 | return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super); |
1da177e4 LT |
112 | } |
113 | ||
114 | static struct file_system_type udf_fstype = { | |
28de7948 CG |
115 | .owner = THIS_MODULE, |
116 | .name = "udf", | |
152a0836 | 117 | .mount = udf_mount, |
28de7948 CG |
118 | .kill_sb = kill_block_super, |
119 | .fs_flags = FS_REQUIRES_DEV, | |
1da177e4 LT |
120 | }; |
121 | ||
cb00ea35 | 122 | static struct kmem_cache *udf_inode_cachep; |
1da177e4 LT |
123 | |
124 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
125 | { | |
126 | struct udf_inode_info *ei; | |
3a71fc5d | 127 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
128 | if (!ei) |
129 | return NULL; | |
95f8797f DB |
130 | |
131 | ei->i_unique = 0; | |
132 | ei->i_lenExtents = 0; | |
133 | ei->i_next_alloc_block = 0; | |
134 | ei->i_next_alloc_goal = 0; | |
135 | ei->i_strat4096 = 0; | |
4d0fb621 | 136 | init_rwsem(&ei->i_data_sem); |
95f8797f | 137 | |
1da177e4 LT |
138 | return &ei->vfs_inode; |
139 | } | |
140 | ||
fa0d7e3d | 141 | static void udf_i_callback(struct rcu_head *head) |
1da177e4 | 142 | { |
fa0d7e3d | 143 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
144 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); |
145 | } | |
146 | ||
fa0d7e3d NP |
147 | static void udf_destroy_inode(struct inode *inode) |
148 | { | |
149 | call_rcu(&inode->i_rcu, udf_i_callback); | |
150 | } | |
151 | ||
51cc5068 | 152 | static void init_once(void *foo) |
1da177e4 | 153 | { |
cb00ea35 | 154 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 155 | |
a35afb83 CL |
156 | ei->i_ext.i_data = NULL; |
157 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
158 | } |
159 | ||
160 | static int init_inodecache(void) | |
161 | { | |
162 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
163 | sizeof(struct udf_inode_info), | |
cb00ea35 CG |
164 | 0, (SLAB_RECLAIM_ACCOUNT | |
165 | SLAB_MEM_SPREAD), | |
20c2df83 | 166 | init_once); |
28de7948 | 167 | if (!udf_inode_cachep) |
1da177e4 LT |
168 | return -ENOMEM; |
169 | return 0; | |
170 | } | |
171 | ||
172 | static void destroy_inodecache(void) | |
173 | { | |
1a1d92c1 | 174 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
175 | } |
176 | ||
177 | /* Superblock operations */ | |
ee9b6d61 | 178 | static const struct super_operations udf_sb_ops = { |
28de7948 CG |
179 | .alloc_inode = udf_alloc_inode, |
180 | .destroy_inode = udf_destroy_inode, | |
181 | .write_inode = udf_write_inode, | |
3aac2b62 | 182 | .evict_inode = udf_evict_inode, |
28de7948 | 183 | .put_super = udf_put_super, |
146bca72 | 184 | .sync_fs = udf_sync_fs, |
28de7948 CG |
185 | .statfs = udf_statfs, |
186 | .remount_fs = udf_remount_fs, | |
6da80894 | 187 | .show_options = udf_show_options, |
1da177e4 LT |
188 | }; |
189 | ||
cb00ea35 | 190 | struct udf_options { |
1da177e4 LT |
191 | unsigned char novrs; |
192 | unsigned int blocksize; | |
193 | unsigned int session; | |
194 | unsigned int lastblock; | |
195 | unsigned int anchor; | |
196 | unsigned int volume; | |
197 | unsigned short partition; | |
198 | unsigned int fileset; | |
199 | unsigned int rootdir; | |
200 | unsigned int flags; | |
faa17292 | 201 | umode_t umask; |
c2ba138a EB |
202 | kgid_t gid; |
203 | kuid_t uid; | |
faa17292 AV |
204 | umode_t fmode; |
205 | umode_t dmode; | |
1da177e4 LT |
206 | struct nls_table *nls_map; |
207 | }; | |
208 | ||
209 | static int __init init_udf_fs(void) | |
210 | { | |
211 | int err; | |
28de7948 | 212 | |
1da177e4 LT |
213 | err = init_inodecache(); |
214 | if (err) | |
215 | goto out1; | |
216 | err = register_filesystem(&udf_fstype); | |
217 | if (err) | |
218 | goto out; | |
28de7948 | 219 | |
1da177e4 | 220 | return 0; |
28de7948 CG |
221 | |
222 | out: | |
1da177e4 | 223 | destroy_inodecache(); |
28de7948 CG |
224 | |
225 | out1: | |
1da177e4 LT |
226 | return err; |
227 | } | |
228 | ||
229 | static void __exit exit_udf_fs(void) | |
230 | { | |
231 | unregister_filesystem(&udf_fstype); | |
232 | destroy_inodecache(); | |
233 | } | |
234 | ||
235 | module_init(init_udf_fs) | |
28de7948 | 236 | module_exit(exit_udf_fs) |
1da177e4 | 237 | |
dc5d39be MS |
238 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
239 | { | |
240 | struct udf_sb_info *sbi = UDF_SB(sb); | |
241 | ||
242 | sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), | |
243 | GFP_KERNEL); | |
244 | if (!sbi->s_partmaps) { | |
8076c363 JP |
245 | udf_err(sb, "Unable to allocate space for %d partition maps\n", |
246 | count); | |
dc5d39be MS |
247 | sbi->s_partitions = 0; |
248 | return -ENOMEM; | |
249 | } | |
250 | ||
251 | sbi->s_partitions = count; | |
252 | return 0; | |
253 | } | |
254 | ||
bff943af JK |
255 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
256 | { | |
257 | int i; | |
258 | int nr_groups = bitmap->s_nr_groups; | |
259 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * | |
260 | nr_groups); | |
261 | ||
262 | for (i = 0; i < nr_groups; i++) | |
263 | if (bitmap->s_block_bitmap[i]) | |
264 | brelse(bitmap->s_block_bitmap[i]); | |
265 | ||
266 | if (size <= PAGE_SIZE) | |
267 | kfree(bitmap); | |
268 | else | |
269 | vfree(bitmap); | |
270 | } | |
271 | ||
272 | static void udf_free_partition(struct udf_part_map *map) | |
273 | { | |
274 | int i; | |
275 | struct udf_meta_data *mdata; | |
276 | ||
277 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
278 | iput(map->s_uspace.s_table); | |
279 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
280 | iput(map->s_fspace.s_table); | |
281 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
282 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
283 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) | |
284 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); | |
285 | if (map->s_partition_type == UDF_SPARABLE_MAP15) | |
286 | for (i = 0; i < 4; i++) | |
287 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
288 | else if (map->s_partition_type == UDF_METADATA_MAP25) { | |
289 | mdata = &map->s_type_specific.s_metadata; | |
290 | iput(mdata->s_metadata_fe); | |
291 | mdata->s_metadata_fe = NULL; | |
292 | ||
293 | iput(mdata->s_mirror_fe); | |
294 | mdata->s_mirror_fe = NULL; | |
295 | ||
296 | iput(mdata->s_bitmap_fe); | |
297 | mdata->s_bitmap_fe = NULL; | |
298 | } | |
299 | } | |
300 | ||
301 | static void udf_sb_free_partitions(struct super_block *sb) | |
302 | { | |
303 | struct udf_sb_info *sbi = UDF_SB(sb); | |
304 | int i; | |
305 | ||
306 | for (i = 0; i < sbi->s_partitions; i++) | |
307 | udf_free_partition(&sbi->s_partmaps[i]); | |
308 | kfree(sbi->s_partmaps); | |
309 | sbi->s_partmaps = NULL; | |
310 | } | |
311 | ||
34c80b1d | 312 | static int udf_show_options(struct seq_file *seq, struct dentry *root) |
6da80894 | 313 | { |
34c80b1d | 314 | struct super_block *sb = root->d_sb; |
6da80894 MS |
315 | struct udf_sb_info *sbi = UDF_SB(sb); |
316 | ||
317 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
318 | seq_puts(seq, ",nostrict"); | |
1197e4df | 319 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) |
6da80894 MS |
320 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); |
321 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
322 | seq_puts(seq, ",unhide"); | |
323 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
324 | seq_puts(seq, ",undelete"); | |
325 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
326 | seq_puts(seq, ",noadinicb"); | |
327 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
328 | seq_puts(seq, ",shortad"); | |
329 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
330 | seq_puts(seq, ",uid=forget"); | |
331 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) | |
332 | seq_puts(seq, ",uid=ignore"); | |
333 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) | |
334 | seq_puts(seq, ",gid=forget"); | |
335 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) | |
336 | seq_puts(seq, ",gid=ignore"); | |
337 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) | |
c2ba138a | 338 | seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid)); |
6da80894 | 339 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) |
c2ba138a | 340 | seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid)); |
6da80894 | 341 | if (sbi->s_umask != 0) |
faa17292 | 342 | seq_printf(seq, ",umask=%ho", sbi->s_umask); |
87bc730c | 343 | if (sbi->s_fmode != UDF_INVALID_MODE) |
faa17292 | 344 | seq_printf(seq, ",mode=%ho", sbi->s_fmode); |
87bc730c | 345 | if (sbi->s_dmode != UDF_INVALID_MODE) |
faa17292 | 346 | seq_printf(seq, ",dmode=%ho", sbi->s_dmode); |
6da80894 MS |
347 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) |
348 | seq_printf(seq, ",session=%u", sbi->s_session); | |
349 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) | |
350 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
40346005 JK |
351 | if (sbi->s_anchor != 0) |
352 | seq_printf(seq, ",anchor=%u", sbi->s_anchor); | |
6da80894 MS |
353 | /* |
354 | * volume, partition, fileset and rootdir seem to be ignored | |
355 | * currently | |
356 | */ | |
357 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) | |
358 | seq_puts(seq, ",utf8"); | |
359 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
360 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
1da177e4 LT |
365 | /* |
366 | * udf_parse_options | |
367 | * | |
368 | * PURPOSE | |
369 | * Parse mount options. | |
370 | * | |
371 | * DESCRIPTION | |
372 | * The following mount options are supported: | |
373 | * | |
374 | * gid= Set the default group. | |
375 | * umask= Set the default umask. | |
7ac9bcd5 MS |
376 | * mode= Set the default file permissions. |
377 | * dmode= Set the default directory permissions. | |
1da177e4 LT |
378 | * uid= Set the default user. |
379 | * bs= Set the block size. | |
380 | * unhide Show otherwise hidden files. | |
381 | * undelete Show deleted files in lists. | |
382 | * adinicb Embed data in the inode (default) | |
383 | * noadinicb Don't embed data in the inode | |
384 | * shortad Use short ad's | |
385 | * longad Use long ad's (default) | |
386 | * nostrict Unset strict conformance | |
387 | * iocharset= Set the NLS character set | |
388 | * | |
389 | * The remaining are for debugging and disaster recovery: | |
390 | * | |
28de7948 | 391 | * novrs Skip volume sequence recognition |
1da177e4 LT |
392 | * |
393 | * The following expect a offset from 0. | |
394 | * | |
395 | * session= Set the CDROM session (default= last session) | |
396 | * anchor= Override standard anchor location. (default= 256) | |
397 | * volume= Override the VolumeDesc location. (unused) | |
398 | * partition= Override the PartitionDesc location. (unused) | |
399 | * lastblock= Set the last block of the filesystem/ | |
400 | * | |
401 | * The following expect a offset from the partition root. | |
402 | * | |
403 | * fileset= Override the fileset block location. (unused) | |
404 | * rootdir= Override the root directory location. (unused) | |
405 | * WARNING: overriding the rootdir to a non-directory may | |
406 | * yield highly unpredictable results. | |
407 | * | |
408 | * PRE-CONDITIONS | |
409 | * options Pointer to mount options string. | |
410 | * uopts Pointer to mount options variable. | |
411 | * | |
412 | * POST-CONDITIONS | |
413 | * <return> 1 Mount options parsed okay. | |
414 | * <return> 0 Error parsing mount options. | |
415 | * | |
416 | * HISTORY | |
417 | * July 1, 1997 - Andrew E. Mileski | |
418 | * Written, tested, and released. | |
419 | */ | |
28de7948 | 420 | |
1da177e4 LT |
421 | enum { |
422 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
423 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
424 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
425 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
426 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
7ac9bcd5 MS |
427 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, |
428 | Opt_fmode, Opt_dmode | |
1da177e4 LT |
429 | }; |
430 | ||
a447c093 | 431 | static const match_table_t tokens = { |
28de7948 CG |
432 | {Opt_novrs, "novrs"}, |
433 | {Opt_nostrict, "nostrict"}, | |
434 | {Opt_bs, "bs=%u"}, | |
435 | {Opt_unhide, "unhide"}, | |
436 | {Opt_undelete, "undelete"}, | |
437 | {Opt_noadinicb, "noadinicb"}, | |
438 | {Opt_adinicb, "adinicb"}, | |
439 | {Opt_shortad, "shortad"}, | |
440 | {Opt_longad, "longad"}, | |
441 | {Opt_uforget, "uid=forget"}, | |
442 | {Opt_uignore, "uid=ignore"}, | |
443 | {Opt_gforget, "gid=forget"}, | |
444 | {Opt_gignore, "gid=ignore"}, | |
445 | {Opt_gid, "gid=%u"}, | |
446 | {Opt_uid, "uid=%u"}, | |
447 | {Opt_umask, "umask=%o"}, | |
448 | {Opt_session, "session=%u"}, | |
449 | {Opt_lastblock, "lastblock=%u"}, | |
450 | {Opt_anchor, "anchor=%u"}, | |
451 | {Opt_volume, "volume=%u"}, | |
452 | {Opt_partition, "partition=%u"}, | |
453 | {Opt_fileset, "fileset=%u"}, | |
454 | {Opt_rootdir, "rootdir=%u"}, | |
455 | {Opt_utf8, "utf8"}, | |
456 | {Opt_iocharset, "iocharset=%s"}, | |
7ac9bcd5 MS |
457 | {Opt_fmode, "mode=%o"}, |
458 | {Opt_dmode, "dmode=%o"}, | |
28de7948 | 459 | {Opt_err, NULL} |
1da177e4 LT |
460 | }; |
461 | ||
6da80894 MS |
462 | static int udf_parse_options(char *options, struct udf_options *uopt, |
463 | bool remount) | |
1da177e4 LT |
464 | { |
465 | char *p; | |
466 | int option; | |
467 | ||
468 | uopt->novrs = 0; | |
1da177e4 LT |
469 | uopt->partition = 0xFFFF; |
470 | uopt->session = 0xFFFFFFFF; | |
471 | uopt->lastblock = 0; | |
472 | uopt->anchor = 0; | |
473 | uopt->volume = 0xFFFFFFFF; | |
474 | uopt->rootdir = 0xFFFFFFFF; | |
475 | uopt->fileset = 0xFFFFFFFF; | |
476 | uopt->nls_map = NULL; | |
477 | ||
478 | if (!options) | |
479 | return 1; | |
480 | ||
cb00ea35 | 481 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
482 | substring_t args[MAX_OPT_ARGS]; |
483 | int token; | |
484 | if (!*p) | |
485 | continue; | |
486 | ||
487 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
488 | switch (token) { |
489 | case Opt_novrs: | |
490 | uopt->novrs = 1; | |
4136801a | 491 | break; |
cb00ea35 CG |
492 | case Opt_bs: |
493 | if (match_int(&args[0], &option)) | |
494 | return 0; | |
495 | uopt->blocksize = option; | |
1197e4df | 496 | uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); |
cb00ea35 CG |
497 | break; |
498 | case Opt_unhide: | |
499 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
500 | break; | |
501 | case Opt_undelete: | |
502 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
503 | break; | |
504 | case Opt_noadinicb: | |
505 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
506 | break; | |
507 | case Opt_adinicb: | |
508 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
509 | break; | |
510 | case Opt_shortad: | |
511 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
512 | break; | |
513 | case Opt_longad: | |
514 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
515 | break; | |
516 | case Opt_gid: | |
517 | if (match_int(args, &option)) | |
518 | return 0; | |
c2ba138a EB |
519 | uopt->gid = make_kgid(current_user_ns(), option); |
520 | if (!gid_valid(uopt->gid)) | |
521 | return 0; | |
ca76d2d8 | 522 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
523 | break; |
524 | case Opt_uid: | |
525 | if (match_int(args, &option)) | |
526 | return 0; | |
c2ba138a EB |
527 | uopt->uid = make_kuid(current_user_ns(), option); |
528 | if (!uid_valid(uopt->uid)) | |
529 | return 0; | |
ca76d2d8 | 530 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
531 | break; |
532 | case Opt_umask: | |
533 | if (match_octal(args, &option)) | |
534 | return 0; | |
535 | uopt->umask = option; | |
536 | break; | |
537 | case Opt_nostrict: | |
538 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
539 | break; | |
540 | case Opt_session: | |
541 | if (match_int(args, &option)) | |
542 | return 0; | |
543 | uopt->session = option; | |
6da80894 MS |
544 | if (!remount) |
545 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
546 | break; |
547 | case Opt_lastblock: | |
548 | if (match_int(args, &option)) | |
549 | return 0; | |
550 | uopt->lastblock = option; | |
6da80894 MS |
551 | if (!remount) |
552 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
553 | break; |
554 | case Opt_anchor: | |
555 | if (match_int(args, &option)) | |
556 | return 0; | |
557 | uopt->anchor = option; | |
558 | break; | |
559 | case Opt_volume: | |
560 | if (match_int(args, &option)) | |
561 | return 0; | |
562 | uopt->volume = option; | |
563 | break; | |
564 | case Opt_partition: | |
565 | if (match_int(args, &option)) | |
566 | return 0; | |
567 | uopt->partition = option; | |
568 | break; | |
569 | case Opt_fileset: | |
570 | if (match_int(args, &option)) | |
571 | return 0; | |
572 | uopt->fileset = option; | |
573 | break; | |
574 | case Opt_rootdir: | |
575 | if (match_int(args, &option)) | |
576 | return 0; | |
577 | uopt->rootdir = option; | |
578 | break; | |
579 | case Opt_utf8: | |
580 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
581 | break; | |
1da177e4 | 582 | #ifdef CONFIG_UDF_NLS |
cb00ea35 CG |
583 | case Opt_iocharset: |
584 | uopt->nls_map = load_nls(args[0].from); | |
585 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
586 | break; | |
1da177e4 | 587 | #endif |
cb00ea35 CG |
588 | case Opt_uignore: |
589 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); | |
590 | break; | |
591 | case Opt_uforget: | |
592 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
593 | break; | |
594 | case Opt_gignore: | |
595 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); | |
596 | break; | |
597 | case Opt_gforget: | |
598 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
599 | break; | |
7ac9bcd5 MS |
600 | case Opt_fmode: |
601 | if (match_octal(args, &option)) | |
602 | return 0; | |
603 | uopt->fmode = option & 0777; | |
604 | break; | |
605 | case Opt_dmode: | |
606 | if (match_octal(args, &option)) | |
607 | return 0; | |
608 | uopt->dmode = option & 0777; | |
609 | break; | |
cb00ea35 | 610 | default: |
78ace70c | 611 | pr_err("bad mount option \"%s\" or missing value\n", p); |
1da177e4 LT |
612 | return 0; |
613 | } | |
614 | } | |
615 | return 1; | |
616 | } | |
617 | ||
cb00ea35 | 618 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
619 | { |
620 | struct udf_options uopt; | |
6c79e987 | 621 | struct udf_sb_info *sbi = UDF_SB(sb); |
c79d967d | 622 | int error = 0; |
1da177e4 | 623 | |
6c79e987 MS |
624 | uopt.flags = sbi->s_flags; |
625 | uopt.uid = sbi->s_uid; | |
626 | uopt.gid = sbi->s_gid; | |
627 | uopt.umask = sbi->s_umask; | |
7ac9bcd5 MS |
628 | uopt.fmode = sbi->s_fmode; |
629 | uopt.dmode = sbi->s_dmode; | |
1da177e4 | 630 | |
6da80894 | 631 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
632 | return -EINVAL; |
633 | ||
c03cad24 | 634 | write_lock(&sbi->s_cred_lock); |
6c79e987 MS |
635 | sbi->s_flags = uopt.flags; |
636 | sbi->s_uid = uopt.uid; | |
637 | sbi->s_gid = uopt.gid; | |
638 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
639 | sbi->s_fmode = uopt.fmode; |
640 | sbi->s_dmode = uopt.dmode; | |
c03cad24 | 641 | write_unlock(&sbi->s_cred_lock); |
1da177e4 | 642 | |
6c79e987 MS |
643 | if (sbi->s_lvid_bh) { |
644 | int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); | |
1da177e4 LT |
645 | if (write_rev > UDF_MAX_WRITE_VERSION) |
646 | *flags |= MS_RDONLY; | |
647 | } | |
648 | ||
c79d967d CH |
649 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
650 | goto out_unlock; | |
651 | ||
36350462 | 652 | if (*flags & MS_RDONLY) |
1da177e4 | 653 | udf_close_lvid(sb); |
36350462 | 654 | else |
1da177e4 LT |
655 | udf_open_lvid(sb); |
656 | ||
c79d967d | 657 | out_unlock: |
c79d967d | 658 | return error; |
1da177e4 LT |
659 | } |
660 | ||
40346005 JK |
661 | /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ |
662 | /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
663 | static loff_t udf_check_vsd(struct super_block *sb) | |
1da177e4 LT |
664 | { |
665 | struct volStructDesc *vsd = NULL; | |
f4bcbbd9 | 666 | loff_t sector = 32768; |
1da177e4 LT |
667 | int sectorsize; |
668 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
669 | int nsr02 = 0; |
670 | int nsr03 = 0; | |
6c79e987 | 671 | struct udf_sb_info *sbi; |
1da177e4 | 672 | |
6c79e987 | 673 | sbi = UDF_SB(sb); |
1da177e4 LT |
674 | if (sb->s_blocksize < sizeof(struct volStructDesc)) |
675 | sectorsize = sizeof(struct volStructDesc); | |
676 | else | |
677 | sectorsize = sb->s_blocksize; | |
678 | ||
6c79e987 | 679 | sector += (sbi->s_session << sb->s_blocksize_bits); |
1da177e4 LT |
680 | |
681 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
706047a7 SM |
682 | (unsigned int)(sector >> sb->s_blocksize_bits), |
683 | sb->s_blocksize); | |
1da177e4 | 684 | /* Process the sequence (if applicable) */ |
cb00ea35 | 685 | for (; !nsr02 && !nsr03; sector += sectorsize) { |
1da177e4 LT |
686 | /* Read a block */ |
687 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
688 | if (!bh) | |
689 | break; | |
690 | ||
691 | /* Look for ISO descriptors */ | |
692 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 693 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 694 | |
cb00ea35 | 695 | if (vsd->stdIdent[0] == 0) { |
3bf25cb4 | 696 | brelse(bh); |
1da177e4 | 697 | break; |
3a71fc5d MS |
698 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
699 | VSD_STD_ID_LEN)) { | |
cb00ea35 CG |
700 | switch (vsd->structType) { |
701 | case 0: | |
702 | udf_debug("ISO9660 Boot Record found\n"); | |
703 | break; | |
704 | case 1: | |
a983f368 | 705 | udf_debug("ISO9660 Primary Volume Descriptor found\n"); |
cb00ea35 CG |
706 | break; |
707 | case 2: | |
a983f368 | 708 | udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); |
cb00ea35 CG |
709 | break; |
710 | case 3: | |
a983f368 | 711 | udf_debug("ISO9660 Volume Partition Descriptor found\n"); |
cb00ea35 CG |
712 | break; |
713 | case 255: | |
a983f368 | 714 | udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); |
cb00ea35 CG |
715 | break; |
716 | default: | |
717 | udf_debug("ISO9660 VRS (%u) found\n", | |
718 | vsd->structType); | |
719 | break; | |
1da177e4 | 720 | } |
3a71fc5d MS |
721 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
722 | VSD_STD_ID_LEN)) | |
723 | ; /* nothing */ | |
724 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
725 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 726 | brelse(bh); |
1da177e4 | 727 | break; |
3a71fc5d MS |
728 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
729 | VSD_STD_ID_LEN)) | |
1da177e4 | 730 | nsr02 = sector; |
3a71fc5d MS |
731 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
732 | VSD_STD_ID_LEN)) | |
1da177e4 | 733 | nsr03 = sector; |
3bf25cb4 | 734 | brelse(bh); |
1da177e4 LT |
735 | } |
736 | ||
737 | if (nsr03) | |
738 | return nsr03; | |
739 | else if (nsr02) | |
740 | return nsr02; | |
6c79e987 | 741 | else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) |
1da177e4 LT |
742 | return -1; |
743 | else | |
744 | return 0; | |
745 | } | |
746 | ||
3a71fc5d | 747 | static int udf_find_fileset(struct super_block *sb, |
5ca4e4be PE |
748 | struct kernel_lb_addr *fileset, |
749 | struct kernel_lb_addr *root) | |
1da177e4 LT |
750 | { |
751 | struct buffer_head *bh = NULL; | |
752 | long lastblock; | |
753 | uint16_t ident; | |
6c79e987 | 754 | struct udf_sb_info *sbi; |
1da177e4 LT |
755 | |
756 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 757 | fileset->partitionReferenceNum != 0xFFFF) { |
97e961fd | 758 | bh = udf_read_ptagged(sb, fileset, 0, &ident); |
1da177e4 | 759 | |
28de7948 | 760 | if (!bh) { |
1da177e4 | 761 | return 1; |
28de7948 | 762 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 763 | brelse(bh); |
1da177e4 LT |
764 | return 1; |
765 | } | |
cb00ea35 | 766 | |
1da177e4 LT |
767 | } |
768 | ||
6c79e987 | 769 | sbi = UDF_SB(sb); |
3a71fc5d MS |
770 | if (!bh) { |
771 | /* Search backwards through the partitions */ | |
5ca4e4be | 772 | struct kernel_lb_addr newfileset; |
1da177e4 | 773 | |
28de7948 | 774 | /* --> cvg: FIXME - is it reasonable? */ |
1da177e4 | 775 | return 1; |
cb00ea35 | 776 | |
6c79e987 | 777 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
cb00ea35 CG |
778 | (newfileset.partitionReferenceNum != 0xFFFF && |
779 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
780 | fileset->partitionReferenceNum == 0xFFFF); | |
781 | newfileset.partitionReferenceNum--) { | |
6c79e987 MS |
782 | lastblock = sbi->s_partmaps |
783 | [newfileset.partitionReferenceNum] | |
784 | .s_partition_len; | |
1da177e4 LT |
785 | newfileset.logicalBlockNum = 0; |
786 | ||
cb00ea35 | 787 | do { |
97e961fd | 788 | bh = udf_read_ptagged(sb, &newfileset, 0, |
3a71fc5d | 789 | &ident); |
cb00ea35 CG |
790 | if (!bh) { |
791 | newfileset.logicalBlockNum++; | |
1da177e4 LT |
792 | continue; |
793 | } | |
794 | ||
cb00ea35 CG |
795 | switch (ident) { |
796 | case TAG_IDENT_SBD: | |
28de7948 CG |
797 | { |
798 | struct spaceBitmapDesc *sp; | |
4b11111a MS |
799 | sp = (struct spaceBitmapDesc *) |
800 | bh->b_data; | |
28de7948 CG |
801 | newfileset.logicalBlockNum += 1 + |
802 | ((le32_to_cpu(sp->numOfBytes) + | |
4b11111a MS |
803 | sizeof(struct spaceBitmapDesc) |
804 | - 1) >> sb->s_blocksize_bits); | |
28de7948 CG |
805 | brelse(bh); |
806 | break; | |
807 | } | |
cb00ea35 | 808 | case TAG_IDENT_FSD: |
28de7948 CG |
809 | *fileset = newfileset; |
810 | break; | |
cb00ea35 | 811 | default: |
28de7948 CG |
812 | newfileset.logicalBlockNum++; |
813 | brelse(bh); | |
814 | bh = NULL; | |
815 | break; | |
1da177e4 | 816 | } |
28de7948 CG |
817 | } while (newfileset.logicalBlockNum < lastblock && |
818 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
819 | fileset->partitionReferenceNum == 0xFFFF); | |
1da177e4 LT |
820 | } |
821 | } | |
822 | ||
823 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 824 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
1da177e4 | 825 | udf_debug("Fileset at block=%d, partition=%d\n", |
cb00ea35 CG |
826 | fileset->logicalBlockNum, |
827 | fileset->partitionReferenceNum); | |
1da177e4 | 828 | |
6c79e987 | 829 | sbi->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 830 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 831 | brelse(bh); |
1da177e4 LT |
832 | return 0; |
833 | } | |
834 | return 1; | |
835 | } | |
836 | ||
c0eb31ed | 837 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
838 | { |
839 | struct primaryVolDesc *pvoldesc; | |
ba9aadd8 | 840 | struct ustr *instr, *outstr; |
c0eb31ed JK |
841 | struct buffer_head *bh; |
842 | uint16_t ident; | |
ba9aadd8 MS |
843 | int ret = 1; |
844 | ||
845 | instr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
846 | if (!instr) | |
847 | return 1; | |
848 | ||
849 | outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
850 | if (!outstr) | |
851 | goto out1; | |
c0eb31ed JK |
852 | |
853 | bh = udf_read_tagged(sb, block, block, &ident); | |
854 | if (!bh) | |
ba9aadd8 MS |
855 | goto out2; |
856 | ||
c0eb31ed | 857 | BUG_ON(ident != TAG_IDENT_PVD); |
1da177e4 LT |
858 | |
859 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
860 | ||
56774805 MS |
861 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
862 | pvoldesc->recordingDateAndTime)) { | |
af15a298 | 863 | #ifdef UDFFS_DEBUG |
5ca4e4be | 864 | struct timestamp *ts = &pvoldesc->recordingDateAndTime; |
a983f368 | 865 | udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", |
af15a298 MS |
866 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, |
867 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
868 | #endif | |
1da177e4 LT |
869 | } |
870 | ||
ba9aadd8 MS |
871 | if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) |
872 | if (udf_CS0toUTF8(outstr, instr)) { | |
873 | strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, | |
874 | outstr->u_len > 31 ? 31 : outstr->u_len); | |
4b11111a | 875 | udf_debug("volIdent[] = '%s'\n", |
a983f368 | 876 | UDF_SB(sb)->s_volume_ident); |
1da177e4 | 877 | } |
1da177e4 | 878 | |
ba9aadd8 MS |
879 | if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) |
880 | if (udf_CS0toUTF8(outstr, instr)) | |
881 | udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); | |
c0eb31ed JK |
882 | |
883 | brelse(bh); | |
ba9aadd8 MS |
884 | ret = 0; |
885 | out2: | |
886 | kfree(outstr); | |
887 | out1: | |
888 | kfree(instr); | |
889 | return ret; | |
1da177e4 LT |
890 | } |
891 | ||
3080a74e NJ |
892 | struct inode *udf_find_metadata_inode_efe(struct super_block *sb, |
893 | u32 meta_file_loc, u32 partition_num) | |
894 | { | |
895 | struct kernel_lb_addr addr; | |
896 | struct inode *metadata_fe; | |
897 | ||
898 | addr.logicalBlockNum = meta_file_loc; | |
899 | addr.partitionReferenceNum = partition_num; | |
900 | ||
901 | metadata_fe = udf_iget(sb, &addr); | |
902 | ||
903 | if (metadata_fe == NULL) | |
904 | udf_warn(sb, "metadata inode efe not found\n"); | |
905 | else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { | |
906 | udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); | |
907 | iput(metadata_fe); | |
908 | metadata_fe = NULL; | |
909 | } | |
910 | ||
911 | return metadata_fe; | |
912 | } | |
913 | ||
bfb257a5 JK |
914 | static int udf_load_metadata_files(struct super_block *sb, int partition) |
915 | { | |
916 | struct udf_sb_info *sbi = UDF_SB(sb); | |
917 | struct udf_part_map *map; | |
918 | struct udf_meta_data *mdata; | |
5ca4e4be | 919 | struct kernel_lb_addr addr; |
bfb257a5 JK |
920 | |
921 | map = &sbi->s_partmaps[partition]; | |
922 | mdata = &map->s_type_specific.s_metadata; | |
923 | ||
924 | /* metadata address */ | |
bfb257a5 | 925 | udf_debug("Metadata file location: block = %d part = %d\n", |
3080a74e | 926 | mdata->s_meta_file_loc, map->s_partition_num); |
bfb257a5 | 927 | |
3080a74e NJ |
928 | mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb, |
929 | mdata->s_meta_file_loc, map->s_partition_num); | |
bfb257a5 JK |
930 | |
931 | if (mdata->s_metadata_fe == NULL) { | |
3080a74e NJ |
932 | /* mirror file entry */ |
933 | udf_debug("Mirror metadata file location: block = %d part = %d\n", | |
934 | mdata->s_mirror_file_loc, map->s_partition_num); | |
bfb257a5 | 935 | |
3080a74e NJ |
936 | mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb, |
937 | mdata->s_mirror_file_loc, map->s_partition_num); | |
bfb257a5 | 938 | |
3080a74e NJ |
939 | if (mdata->s_mirror_fe == NULL) { |
940 | udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); | |
bfb257a5 | 941 | goto error_exit; |
3080a74e | 942 | } |
bfb257a5 JK |
943 | } |
944 | ||
945 | /* | |
946 | * bitmap file entry | |
947 | * Note: | |
948 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) | |
949 | */ | |
950 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { | |
951 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; | |
952 | addr.partitionReferenceNum = map->s_partition_num; | |
953 | ||
954 | udf_debug("Bitmap file location: block = %d part = %d\n", | |
a983f368 | 955 | addr.logicalBlockNum, addr.partitionReferenceNum); |
bfb257a5 | 956 | |
97e961fd | 957 | mdata->s_bitmap_fe = udf_iget(sb, &addr); |
bfb257a5 JK |
958 | |
959 | if (mdata->s_bitmap_fe == NULL) { | |
960 | if (sb->s_flags & MS_RDONLY) | |
a40ecd7b | 961 | udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); |
bfb257a5 | 962 | else { |
8076c363 | 963 | udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); |
bfb257a5 JK |
964 | goto error_exit; |
965 | } | |
966 | } | |
967 | } | |
968 | ||
969 | udf_debug("udf_load_metadata_files Ok\n"); | |
970 | ||
971 | return 0; | |
972 | ||
973 | error_exit: | |
974 | return 1; | |
975 | } | |
976 | ||
28de7948 | 977 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
5ca4e4be | 978 | struct kernel_lb_addr *root) |
1da177e4 LT |
979 | { |
980 | struct fileSetDesc *fset; | |
981 | ||
982 | fset = (struct fileSetDesc *)bh->b_data; | |
983 | ||
984 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
985 | ||
6c79e987 | 986 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 987 | |
cb00ea35 CG |
988 | udf_debug("Rootdir at block=%d, partition=%d\n", |
989 | root->logicalBlockNum, root->partitionReferenceNum); | |
1da177e4 LT |
990 | } |
991 | ||
883cb9d1 MS |
992 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
993 | { | |
994 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
995 | return DIV_ROUND_UP(map->s_partition_len + |
996 | (sizeof(struct spaceBitmapDesc) << 3), | |
997 | sb->s_blocksize * 8); | |
883cb9d1 MS |
998 | } |
999 | ||
66e1da3f MS |
1000 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
1001 | { | |
66e1da3f MS |
1002 | struct udf_bitmap *bitmap; |
1003 | int nr_groups; | |
1004 | int size; | |
1005 | ||
883cb9d1 | 1006 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
1007 | size = sizeof(struct udf_bitmap) + |
1008 | (sizeof(struct buffer_head *) * nr_groups); | |
1009 | ||
1010 | if (size <= PAGE_SIZE) | |
ed2ae6f6 | 1011 | bitmap = kzalloc(size, GFP_KERNEL); |
66e1da3f | 1012 | else |
ed2ae6f6 | 1013 | bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ |
66e1da3f | 1014 | |
75b09e02 | 1015 | if (bitmap == NULL) |
66e1da3f | 1016 | return NULL; |
66e1da3f | 1017 | |
66e1da3f MS |
1018 | bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); |
1019 | bitmap->s_nr_groups = nr_groups; | |
1020 | return bitmap; | |
1021 | } | |
1022 | ||
3fb38dfa JK |
1023 | static int udf_fill_partdesc_info(struct super_block *sb, |
1024 | struct partitionDesc *p, int p_index) | |
1da177e4 | 1025 | { |
6c79e987 | 1026 | struct udf_part_map *map; |
165923fa | 1027 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 1028 | struct partitionHeaderDesc *phd; |
165923fa | 1029 | |
3fb38dfa | 1030 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
1031 | |
1032 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
1033 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
1034 | ||
1035 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
1036 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
1037 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
1038 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
1039 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
1040 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
1041 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
1042 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
1043 | ||
a983f368 JP |
1044 | udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n", |
1045 | p_index, map->s_partition_type, | |
1046 | map->s_partition_root, map->s_partition_len); | |
165923fa MS |
1047 | |
1048 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
1049 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
3fb38dfa | 1050 | return 0; |
165923fa MS |
1051 | |
1052 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1053 | if (phd->unallocSpaceTable.extLength) { | |
5ca4e4be | 1054 | struct kernel_lb_addr loc = { |
165923fa MS |
1055 | .logicalBlockNum = le32_to_cpu( |
1056 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 1057 | .partitionReferenceNum = p_index, |
165923fa MS |
1058 | }; |
1059 | ||
97e961fd | 1060 | map->s_uspace.s_table = udf_iget(sb, &loc); |
165923fa MS |
1061 | if (!map->s_uspace.s_table) { |
1062 | udf_debug("cannot load unallocSpaceTable (part %d)\n", | |
a983f368 | 1063 | p_index); |
3fb38dfa | 1064 | return 1; |
165923fa MS |
1065 | } |
1066 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; | |
1067 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", | |
a983f368 | 1068 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1069 | } |
1070 | ||
1071 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1072 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1073 | if (!bitmap) | |
1074 | return 1; | |
165923fa | 1075 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1076 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1077 | phd->unallocSpaceBitmap.extLength); |
2e0838fd | 1078 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1079 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1080 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
a983f368 JP |
1081 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", |
1082 | p_index, bitmap->s_extPosition); | |
165923fa MS |
1083 | } |
1084 | ||
1085 | if (phd->partitionIntegrityTable.extLength) | |
3fb38dfa | 1086 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); |
165923fa MS |
1087 | |
1088 | if (phd->freedSpaceTable.extLength) { | |
5ca4e4be | 1089 | struct kernel_lb_addr loc = { |
165923fa MS |
1090 | .logicalBlockNum = le32_to_cpu( |
1091 | phd->freedSpaceTable.extPosition), | |
3fb38dfa | 1092 | .partitionReferenceNum = p_index, |
165923fa MS |
1093 | }; |
1094 | ||
97e961fd | 1095 | map->s_fspace.s_table = udf_iget(sb, &loc); |
165923fa | 1096 | if (!map->s_fspace.s_table) { |
3fb38dfa | 1097 | udf_debug("cannot load freedSpaceTable (part %d)\n", |
a983f368 | 1098 | p_index); |
3fb38dfa | 1099 | return 1; |
165923fa MS |
1100 | } |
1101 | ||
1102 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; | |
1103 | udf_debug("freedSpaceTable (part %d) @ %ld\n", | |
a983f368 | 1104 | p_index, map->s_fspace.s_table->i_ino); |
165923fa MS |
1105 | } |
1106 | ||
1107 | if (phd->freedSpaceBitmap.extLength) { | |
3fb38dfa JK |
1108 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1109 | if (!bitmap) | |
1110 | return 1; | |
165923fa | 1111 | map->s_fspace.s_bitmap = bitmap; |
2e0838fd | 1112 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1113 | phd->freedSpaceBitmap.extLength); |
2e0838fd | 1114 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1115 | phd->freedSpaceBitmap.extPosition); |
2e0838fd | 1116 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
a983f368 JP |
1117 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", |
1118 | p_index, bitmap->s_extPosition); | |
165923fa | 1119 | } |
3fb38dfa JK |
1120 | return 0; |
1121 | } | |
1122 | ||
e971b0b9 JK |
1123 | static void udf_find_vat_block(struct super_block *sb, int p_index, |
1124 | int type1_index, sector_t start_block) | |
38b74a53 JK |
1125 | { |
1126 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1127 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
e971b0b9 | 1128 | sector_t vat_block; |
5ca4e4be | 1129 | struct kernel_lb_addr ino; |
e971b0b9 JK |
1130 | |
1131 | /* | |
1132 | * VAT file entry is in the last recorded block. Some broken disks have | |
1133 | * it a few blocks before so try a bit harder... | |
1134 | */ | |
1135 | ino.partitionReferenceNum = type1_index; | |
1136 | for (vat_block = start_block; | |
1137 | vat_block >= map->s_partition_root && | |
1138 | vat_block >= start_block - 3 && | |
1139 | !sbi->s_vat_inode; vat_block--) { | |
1140 | ino.logicalBlockNum = vat_block - map->s_partition_root; | |
1141 | sbi->s_vat_inode = udf_iget(sb, &ino); | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) | |
1146 | { | |
1147 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1148 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
fa5e0815 JK |
1149 | struct buffer_head *bh = NULL; |
1150 | struct udf_inode_info *vati; | |
1151 | uint32_t pos; | |
1152 | struct virtualAllocationTable20 *vat20; | |
4bf17af0 | 1153 | sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; |
38b74a53 | 1154 | |
e971b0b9 | 1155 | udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); |
4bf17af0 JK |
1156 | if (!sbi->s_vat_inode && |
1157 | sbi->s_last_block != blocks - 1) { | |
78ace70c JP |
1158 | pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", |
1159 | (unsigned long)sbi->s_last_block, | |
1160 | (unsigned long)blocks - 1); | |
e971b0b9 | 1161 | udf_find_vat_block(sb, p_index, type1_index, blocks - 1); |
4bf17af0 | 1162 | } |
38b74a53 JK |
1163 | if (!sbi->s_vat_inode) |
1164 | return 1; | |
1165 | ||
1166 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
47c9358a | 1167 | map->s_type_specific.s_virtual.s_start_offset = 0; |
38b74a53 JK |
1168 | map->s_type_specific.s_virtual.s_num_entries = |
1169 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1170 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
fa5e0815 JK |
1171 | vati = UDF_I(sbi->s_vat_inode); |
1172 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1173 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1174 | bh = sb_bread(sb, pos); | |
1175 | if (!bh) | |
1176 | return 1; | |
1177 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; | |
1178 | } else { | |
1179 | vat20 = (struct virtualAllocationTable20 *) | |
1180 | vati->i_ext.i_data; | |
1181 | } | |
38b74a53 | 1182 | |
38b74a53 | 1183 | map->s_type_specific.s_virtual.s_start_offset = |
47c9358a | 1184 | le16_to_cpu(vat20->lengthHeader); |
38b74a53 JK |
1185 | map->s_type_specific.s_virtual.s_num_entries = |
1186 | (sbi->s_vat_inode->i_size - | |
1187 | map->s_type_specific.s_virtual. | |
1188 | s_start_offset) >> 2; | |
1189 | brelse(bh); | |
1190 | } | |
1191 | return 0; | |
1192 | } | |
1193 | ||
3fb38dfa JK |
1194 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
1195 | { | |
1196 | struct buffer_head *bh; | |
1197 | struct partitionDesc *p; | |
1198 | struct udf_part_map *map; | |
1199 | struct udf_sb_info *sbi = UDF_SB(sb); | |
38b74a53 | 1200 | int i, type1_idx; |
3fb38dfa JK |
1201 | uint16_t partitionNumber; |
1202 | uint16_t ident; | |
1203 | int ret = 0; | |
1204 | ||
1205 | bh = udf_read_tagged(sb, block, block, &ident); | |
1206 | if (!bh) | |
1207 | return 1; | |
1208 | if (ident != TAG_IDENT_PD) | |
1209 | goto out_bh; | |
1210 | ||
1211 | p = (struct partitionDesc *)bh->b_data; | |
1212 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
38b74a53 | 1213 | |
bfb257a5 | 1214 | /* First scan for TYPE1, SPARABLE and METADATA partitions */ |
3fb38dfa JK |
1215 | for (i = 0; i < sbi->s_partitions; i++) { |
1216 | map = &sbi->s_partmaps[i]; | |
1217 | udf_debug("Searching map: (%d == %d)\n", | |
1218 | map->s_partition_num, partitionNumber); | |
38b74a53 JK |
1219 | if (map->s_partition_num == partitionNumber && |
1220 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1221 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
3fb38dfa JK |
1222 | break; |
1223 | } | |
1224 | ||
38b74a53 | 1225 | if (i >= sbi->s_partitions) { |
3fb38dfa JK |
1226 | udf_debug("Partition (%d) not found in partition map\n", |
1227 | partitionNumber); | |
1228 | goto out_bh; | |
1229 | } | |
165923fa | 1230 | |
3fb38dfa | 1231 | ret = udf_fill_partdesc_info(sb, p, i); |
38b74a53 JK |
1232 | |
1233 | /* | |
bfb257a5 JK |
1234 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
1235 | * PHYSICAL partitions are already set up | |
38b74a53 JK |
1236 | */ |
1237 | type1_idx = i; | |
1238 | for (i = 0; i < sbi->s_partitions; i++) { | |
1239 | map = &sbi->s_partmaps[i]; | |
1240 | ||
1241 | if (map->s_partition_num == partitionNumber && | |
1242 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
bfb257a5 JK |
1243 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
1244 | map->s_partition_type == UDF_METADATA_MAP25)) | |
38b74a53 JK |
1245 | break; |
1246 | } | |
1247 | ||
1248 | if (i >= sbi->s_partitions) | |
1249 | goto out_bh; | |
1250 | ||
1251 | ret = udf_fill_partdesc_info(sb, p, i); | |
1252 | if (ret) | |
1253 | goto out_bh; | |
1254 | ||
bfb257a5 JK |
1255 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
1256 | ret = udf_load_metadata_files(sb, i); | |
1257 | if (ret) { | |
78ace70c JP |
1258 | udf_err(sb, "error loading MetaData partition map %d\n", |
1259 | i); | |
bfb257a5 JK |
1260 | goto out_bh; |
1261 | } | |
1262 | } else { | |
1263 | ret = udf_load_vat(sb, i, type1_idx); | |
1264 | if (ret) | |
1265 | goto out_bh; | |
1266 | /* | |
1267 | * Mark filesystem read-only if we have a partition with | |
1268 | * virtual map since we don't handle writing to it (we | |
1269 | * overwrite blocks instead of relocating them). | |
1270 | */ | |
1271 | sb->s_flags |= MS_RDONLY; | |
78ace70c | 1272 | pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n"); |
bfb257a5 | 1273 | } |
c0eb31ed | 1274 | out_bh: |
2e0838fd | 1275 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1276 | brelse(bh); |
1277 | return ret; | |
1da177e4 LT |
1278 | } |
1279 | ||
1df2ae31 JK |
1280 | static int udf_load_sparable_map(struct super_block *sb, |
1281 | struct udf_part_map *map, | |
1282 | struct sparablePartitionMap *spm) | |
1283 | { | |
1284 | uint32_t loc; | |
1285 | uint16_t ident; | |
1286 | struct sparingTable *st; | |
1287 | struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing; | |
1288 | int i; | |
1289 | struct buffer_head *bh; | |
1290 | ||
1291 | map->s_partition_type = UDF_SPARABLE_MAP15; | |
1292 | sdata->s_packet_len = le16_to_cpu(spm->packetLength); | |
1293 | if (!is_power_of_2(sdata->s_packet_len)) { | |
1294 | udf_err(sb, "error loading logical volume descriptor: " | |
1295 | "Invalid packet length %u\n", | |
1296 | (unsigned)sdata->s_packet_len); | |
1297 | return -EIO; | |
1298 | } | |
1299 | if (spm->numSparingTables > 4) { | |
1300 | udf_err(sb, "error loading logical volume descriptor: " | |
1301 | "Too many sparing tables (%d)\n", | |
1302 | (int)spm->numSparingTables); | |
1303 | return -EIO; | |
1304 | } | |
1305 | ||
1306 | for (i = 0; i < spm->numSparingTables; i++) { | |
1307 | loc = le32_to_cpu(spm->locSparingTable[i]); | |
1308 | bh = udf_read_tagged(sb, loc, loc, &ident); | |
1309 | if (!bh) | |
1310 | continue; | |
1311 | ||
1312 | st = (struct sparingTable *)bh->b_data; | |
1313 | if (ident != 0 || | |
1314 | strncmp(st->sparingIdent.ident, UDF_ID_SPARING, | |
1315 | strlen(UDF_ID_SPARING)) || | |
1316 | sizeof(*st) + le16_to_cpu(st->reallocationTableLen) > | |
1317 | sb->s_blocksize) { | |
1318 | brelse(bh); | |
1319 | continue; | |
1320 | } | |
1321 | ||
1322 | sdata->s_spar_map[i] = bh; | |
1323 | } | |
1324 | map->s_partition_func = udf_get_pblock_spar15; | |
1325 | return 0; | |
1326 | } | |
1327 | ||
c0eb31ed | 1328 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
5ca4e4be | 1329 | struct kernel_lb_addr *fileset) |
1da177e4 LT |
1330 | { |
1331 | struct logicalVolDesc *lvd; | |
1df2ae31 | 1332 | int i, offset; |
1da177e4 | 1333 | uint8_t type; |
6c79e987 | 1334 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1335 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1336 | uint16_t ident; |
1337 | struct buffer_head *bh; | |
adee11b2 | 1338 | unsigned int table_len; |
c0eb31ed | 1339 | int ret = 0; |
1da177e4 | 1340 | |
c0eb31ed JK |
1341 | bh = udf_read_tagged(sb, block, block, &ident); |
1342 | if (!bh) | |
1343 | return 1; | |
1344 | BUG_ON(ident != TAG_IDENT_LVD); | |
1da177e4 | 1345 | lvd = (struct logicalVolDesc *)bh->b_data; |
adee11b2 | 1346 | table_len = le32_to_cpu(lvd->mapTableLength); |
57b9655d | 1347 | if (table_len > sb->s_blocksize - sizeof(*lvd)) { |
adee11b2 JK |
1348 | udf_err(sb, "error loading logical volume descriptor: " |
1349 | "Partition table too long (%u > %lu)\n", table_len, | |
1350 | sb->s_blocksize - sizeof(*lvd)); | |
1351 | goto out_bh; | |
1352 | } | |
1da177e4 | 1353 | |
cb14d340 JK |
1354 | ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
1355 | if (ret) | |
c0eb31ed | 1356 | goto out_bh; |
1da177e4 | 1357 | |
cb00ea35 | 1358 | for (i = 0, offset = 0; |
adee11b2 | 1359 | i < sbi->s_partitions && offset < table_len; |
4b11111a MS |
1360 | i++, offset += gpm->partitionMapLength) { |
1361 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1362 | gpm = (struct genericPartitionMap *) | |
1363 | &(lvd->partitionMaps[offset]); | |
1364 | type = gpm->partitionMapType; | |
cb00ea35 | 1365 | if (type == 1) { |
4b11111a MS |
1366 | struct genericPartitionMap1 *gpm1 = |
1367 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1368 | map->s_partition_type = UDF_TYPE1_MAP15; |
1369 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1370 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1371 | map->s_partition_func = NULL; | |
cb00ea35 | 1372 | } else if (type == 2) { |
4b11111a MS |
1373 | struct udfPartitionMap2 *upm2 = |
1374 | (struct udfPartitionMap2 *)gpm; | |
1375 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1376 | strlen(UDF_ID_VIRTUAL))) { | |
1377 | u16 suf = | |
1378 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1379 | identSuffix)[0]); | |
c82a1275 | 1380 | if (suf < 0x0200) { |
4b11111a MS |
1381 | map->s_partition_type = |
1382 | UDF_VIRTUAL_MAP15; | |
1383 | map->s_partition_func = | |
1384 | udf_get_pblock_virt15; | |
c82a1275 | 1385 | } else { |
4b11111a MS |
1386 | map->s_partition_type = |
1387 | UDF_VIRTUAL_MAP20; | |
1388 | map->s_partition_func = | |
1389 | udf_get_pblock_virt20; | |
1da177e4 | 1390 | } |
4b11111a MS |
1391 | } else if (!strncmp(upm2->partIdent.ident, |
1392 | UDF_ID_SPARABLE, | |
1393 | strlen(UDF_ID_SPARABLE))) { | |
1df2ae31 JK |
1394 | if (udf_load_sparable_map(sb, map, |
1395 | (struct sparablePartitionMap *)gpm) < 0) | |
1396 | goto out_bh; | |
bfb257a5 JK |
1397 | } else if (!strncmp(upm2->partIdent.ident, |
1398 | UDF_ID_METADATA, | |
1399 | strlen(UDF_ID_METADATA))) { | |
1400 | struct udf_meta_data *mdata = | |
1401 | &map->s_type_specific.s_metadata; | |
1402 | struct metadataPartitionMap *mdm = | |
1403 | (struct metadataPartitionMap *) | |
1404 | &(lvd->partitionMaps[offset]); | |
a983f368 JP |
1405 | udf_debug("Parsing Logical vol part %d type %d id=%s\n", |
1406 | i, type, UDF_ID_METADATA); | |
bfb257a5 JK |
1407 | |
1408 | map->s_partition_type = UDF_METADATA_MAP25; | |
1409 | map->s_partition_func = udf_get_pblock_meta25; | |
1410 | ||
1411 | mdata->s_meta_file_loc = | |
1412 | le32_to_cpu(mdm->metadataFileLoc); | |
1413 | mdata->s_mirror_file_loc = | |
1414 | le32_to_cpu(mdm->metadataMirrorFileLoc); | |
1415 | mdata->s_bitmap_file_loc = | |
1416 | le32_to_cpu(mdm->metadataBitmapFileLoc); | |
1417 | mdata->s_alloc_unit_size = | |
1418 | le32_to_cpu(mdm->allocUnitSize); | |
1419 | mdata->s_align_unit_size = | |
1420 | le16_to_cpu(mdm->alignUnitSize); | |
ed47a7d0 JK |
1421 | if (mdm->flags & 0x01) |
1422 | mdata->s_flags |= MF_DUPLICATE_MD; | |
bfb257a5 JK |
1423 | |
1424 | udf_debug("Metadata Ident suffix=0x%x\n", | |
a983f368 JP |
1425 | le16_to_cpu(*(__le16 *) |
1426 | mdm->partIdent.identSuffix)); | |
bfb257a5 | 1427 | udf_debug("Metadata part num=%d\n", |
a983f368 | 1428 | le16_to_cpu(mdm->partitionNum)); |
bfb257a5 | 1429 | udf_debug("Metadata part alloc unit size=%d\n", |
a983f368 | 1430 | le32_to_cpu(mdm->allocUnitSize)); |
bfb257a5 | 1431 | udf_debug("Metadata file loc=%d\n", |
a983f368 | 1432 | le32_to_cpu(mdm->metadataFileLoc)); |
bfb257a5 | 1433 | udf_debug("Mirror file loc=%d\n", |
a983f368 | 1434 | le32_to_cpu(mdm->metadataMirrorFileLoc)); |
bfb257a5 | 1435 | udf_debug("Bitmap file loc=%d\n", |
a983f368 | 1436 | le32_to_cpu(mdm->metadataBitmapFileLoc)); |
ed47a7d0 JK |
1437 | udf_debug("Flags: %d %d\n", |
1438 | mdata->s_flags, mdm->flags); | |
cb00ea35 | 1439 | } else { |
3a71fc5d MS |
1440 | udf_debug("Unknown ident: %s\n", |
1441 | upm2->partIdent.ident); | |
1da177e4 LT |
1442 | continue; |
1443 | } | |
6c79e987 MS |
1444 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1445 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 LT |
1446 | } |
1447 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
a983f368 | 1448 | i, map->s_partition_num, type, map->s_volumeseqnum); |
1da177e4 LT |
1449 | } |
1450 | ||
cb00ea35 | 1451 | if (fileset) { |
5ca4e4be | 1452 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1453 | |
1454 | *fileset = lelb_to_cpu(la->extLocation); | |
a983f368 JP |
1455 | udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n", |
1456 | fileset->logicalBlockNum, | |
28de7948 | 1457 | fileset->partitionReferenceNum); |
1da177e4 LT |
1458 | } |
1459 | if (lvd->integritySeqExt.extLength) | |
1460 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
28de7948 | 1461 | |
c0eb31ed JK |
1462 | out_bh: |
1463 | brelse(bh); | |
1464 | return ret; | |
1da177e4 LT |
1465 | } |
1466 | ||
1467 | /* | |
1468 | * udf_load_logicalvolint | |
1469 | * | |
1470 | */ | |
5ca4e4be | 1471 | static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) |
1da177e4 LT |
1472 | { |
1473 | struct buffer_head *bh = NULL; | |
1474 | uint16_t ident; | |
6c79e987 MS |
1475 | struct udf_sb_info *sbi = UDF_SB(sb); |
1476 | struct logicalVolIntegrityDesc *lvid; | |
1da177e4 LT |
1477 | |
1478 | while (loc.extLength > 0 && | |
cb00ea35 CG |
1479 | (bh = udf_read_tagged(sb, loc.extLocation, |
1480 | loc.extLocation, &ident)) && | |
1481 | ident == TAG_IDENT_LVID) { | |
6c79e987 MS |
1482 | sbi->s_lvid_bh = bh; |
1483 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
cb00ea35 | 1484 | |
6c79e987 | 1485 | if (lvid->nextIntegrityExt.extLength) |
3a71fc5d | 1486 | udf_load_logicalvolint(sb, |
6c79e987 | 1487 | leea_to_cpu(lvid->nextIntegrityExt)); |
cb00ea35 | 1488 | |
6c79e987 | 1489 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1490 | brelse(bh); |
1da177e4 | 1491 | loc.extLength -= sb->s_blocksize; |
cb00ea35 | 1492 | loc.extLocation++; |
1da177e4 | 1493 | } |
6c79e987 | 1494 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1495 | brelse(bh); |
1da177e4 LT |
1496 | } |
1497 | ||
1498 | /* | |
1499 | * udf_process_sequence | |
1500 | * | |
1501 | * PURPOSE | |
1502 | * Process a main/reserve volume descriptor sequence. | |
1503 | * | |
1504 | * PRE-CONDITIONS | |
1505 | * sb Pointer to _locked_ superblock. | |
1506 | * block First block of first extent of the sequence. | |
1507 | * lastblock Lastblock of first extent of the sequence. | |
1508 | * | |
1509 | * HISTORY | |
1510 | * July 1, 1997 - Andrew E. Mileski | |
1511 | * Written, tested, and released. | |
1512 | */ | |
200a3592 | 1513 | static noinline int udf_process_sequence(struct super_block *sb, long block, |
5ca4e4be | 1514 | long lastblock, struct kernel_lb_addr *fileset) |
1da177e4 LT |
1515 | { |
1516 | struct buffer_head *bh = NULL; | |
1517 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
4b11111a | 1518 | struct udf_vds_record *curr; |
1da177e4 LT |
1519 | struct generic_desc *gd; |
1520 | struct volDescPtr *vdp; | |
cb00ea35 | 1521 | int done = 0; |
1da177e4 LT |
1522 | uint32_t vdsn; |
1523 | uint16_t ident; | |
1524 | long next_s = 0, next_e = 0; | |
1525 | ||
1526 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1527 | ||
c0eb31ed JK |
1528 | /* |
1529 | * Read the main descriptor sequence and find which descriptors | |
1530 | * are in it. | |
1531 | */ | |
cb00ea35 | 1532 | for (; (!done && block <= lastblock); block++) { |
1da177e4 LT |
1533 | |
1534 | bh = udf_read_tagged(sb, block, block, &ident); | |
c0eb31ed | 1535 | if (!bh) { |
78ace70c JP |
1536 | udf_err(sb, |
1537 | "Block %llu of volume descriptor sequence is corrupted or we could not read it\n", | |
1538 | (unsigned long long)block); | |
c0eb31ed JK |
1539 | return 1; |
1540 | } | |
1da177e4 LT |
1541 | |
1542 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1543 | gd = (struct generic_desc *)bh->b_data; | |
1544 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1545 | switch (ident) { |
28de7948 | 1546 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
4b11111a MS |
1547 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
1548 | if (vdsn >= curr->volDescSeqNum) { | |
1549 | curr->volDescSeqNum = vdsn; | |
1550 | curr->block = block; | |
cb00ea35 CG |
1551 | } |
1552 | break; | |
28de7948 | 1553 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
4b11111a MS |
1554 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
1555 | if (vdsn >= curr->volDescSeqNum) { | |
1556 | curr->volDescSeqNum = vdsn; | |
1557 | curr->block = block; | |
cb00ea35 CG |
1558 | |
1559 | vdp = (struct volDescPtr *)bh->b_data; | |
4b11111a MS |
1560 | next_s = le32_to_cpu( |
1561 | vdp->nextVolDescSeqExt.extLocation); | |
1562 | next_e = le32_to_cpu( | |
1563 | vdp->nextVolDescSeqExt.extLength); | |
cb00ea35 CG |
1564 | next_e = next_e >> sb->s_blocksize_bits; |
1565 | next_e += next_s; | |
1566 | } | |
1567 | break; | |
28de7948 | 1568 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
4b11111a MS |
1569 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
1570 | if (vdsn >= curr->volDescSeqNum) { | |
1571 | curr->volDescSeqNum = vdsn; | |
1572 | curr->block = block; | |
cb00ea35 CG |
1573 | } |
1574 | break; | |
28de7948 | 1575 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
4b11111a MS |
1576 | curr = &vds[VDS_POS_PARTITION_DESC]; |
1577 | if (!curr->block) | |
1578 | curr->block = block; | |
cb00ea35 | 1579 | break; |
28de7948 | 1580 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
4b11111a MS |
1581 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
1582 | if (vdsn >= curr->volDescSeqNum) { | |
1583 | curr->volDescSeqNum = vdsn; | |
1584 | curr->block = block; | |
cb00ea35 CG |
1585 | } |
1586 | break; | |
28de7948 | 1587 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
4b11111a MS |
1588 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
1589 | if (vdsn >= curr->volDescSeqNum) { | |
1590 | curr->volDescSeqNum = vdsn; | |
1591 | curr->block = block; | |
cb00ea35 CG |
1592 | } |
1593 | break; | |
28de7948 | 1594 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
cb00ea35 CG |
1595 | vds[VDS_POS_TERMINATING_DESC].block = block; |
1596 | if (next_e) { | |
1597 | block = next_s; | |
1598 | lastblock = next_e; | |
1599 | next_s = next_e = 0; | |
4b11111a | 1600 | } else |
cb00ea35 CG |
1601 | done = 1; |
1602 | break; | |
1da177e4 | 1603 | } |
3bf25cb4 | 1604 | brelse(bh); |
1da177e4 | 1605 | } |
c0eb31ed JK |
1606 | /* |
1607 | * Now read interesting descriptors again and process them | |
1608 | * in a suitable order | |
1609 | */ | |
1610 | if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { | |
78ace70c | 1611 | udf_err(sb, "Primary Volume Descriptor not found!\n"); |
c0eb31ed JK |
1612 | return 1; |
1613 | } | |
1614 | if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) | |
1615 | return 1; | |
165923fa | 1616 | |
c0eb31ed JK |
1617 | if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, |
1618 | vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) | |
1619 | return 1; | |
165923fa | 1620 | |
c0eb31ed JK |
1621 | if (vds[VDS_POS_PARTITION_DESC].block) { |
1622 | /* | |
1623 | * We rescan the whole descriptor sequence to find | |
1624 | * partition descriptor blocks and process them. | |
1625 | */ | |
1626 | for (block = vds[VDS_POS_PARTITION_DESC].block; | |
1627 | block < vds[VDS_POS_TERMINATING_DESC].block; | |
1628 | block++) | |
1629 | if (udf_load_partdesc(sb, block)) | |
165923fa | 1630 | return 1; |
1da177e4 LT |
1631 | } |
1632 | ||
1633 | return 0; | |
1634 | } | |
1635 | ||
40346005 JK |
1636 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, |
1637 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1638 | { |
40346005 JK |
1639 | struct anchorVolDescPtr *anchor; |
1640 | long main_s, main_e, reserve_s, reserve_e; | |
1da177e4 | 1641 | |
40346005 JK |
1642 | anchor = (struct anchorVolDescPtr *)bh->b_data; |
1643 | ||
1644 | /* Locate the main sequence */ | |
1645 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1646 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1647 | main_e = main_e >> sb->s_blocksize_bits; | |
1648 | main_e += main_s; | |
1649 | ||
1650 | /* Locate the reserve sequence */ | |
1651 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); | |
1652 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); | |
1653 | reserve_e = reserve_e >> sb->s_blocksize_bits; | |
1654 | reserve_e += reserve_s; | |
1655 | ||
1656 | /* Process the main & reserve sequences */ | |
1657 | /* responsible for finding the PartitionDesc(s) */ | |
1658 | if (!udf_process_sequence(sb, main_s, main_e, fileset)) | |
1659 | return 1; | |
bff943af JK |
1660 | udf_sb_free_partitions(sb); |
1661 | if (!udf_process_sequence(sb, reserve_s, reserve_e, fileset)) | |
1662 | return 1; | |
1663 | udf_sb_free_partitions(sb); | |
1664 | return 0; | |
1da177e4 LT |
1665 | } |
1666 | ||
40346005 JK |
1667 | /* |
1668 | * Check whether there is an anchor block in the given block and | |
1669 | * load Volume Descriptor Sequence if so. | |
1670 | */ | |
1671 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, | |
1672 | struct kernel_lb_addr *fileset) | |
1197e4df | 1673 | { |
40346005 JK |
1674 | struct buffer_head *bh; |
1675 | uint16_t ident; | |
1676 | int ret; | |
1197e4df | 1677 | |
40346005 JK |
1678 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
1679 | udf_fixed_to_variable(block) >= | |
1680 | sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) | |
1197e4df | 1681 | return 0; |
40346005 JK |
1682 | |
1683 | bh = udf_read_tagged(sb, block, block, &ident); | |
1684 | if (!bh) | |
1197e4df | 1685 | return 0; |
40346005 JK |
1686 | if (ident != TAG_IDENT_AVDP) { |
1687 | brelse(bh); | |
1197e4df CL |
1688 | return 0; |
1689 | } | |
40346005 JK |
1690 | ret = udf_load_sequence(sb, bh, fileset); |
1691 | brelse(bh); | |
1692 | return ret; | |
1197e4df CL |
1693 | } |
1694 | ||
40346005 JK |
1695 | /* Search for an anchor volume descriptor pointer */ |
1696 | static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock, | |
1697 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1698 | { |
40346005 | 1699 | sector_t last[6]; |
38b74a53 | 1700 | int i; |
40346005 JK |
1701 | struct udf_sb_info *sbi = UDF_SB(sb); |
1702 | int last_count = 0; | |
1da177e4 | 1703 | |
40346005 JK |
1704 | /* First try user provided anchor */ |
1705 | if (sbi->s_anchor) { | |
1706 | if (udf_check_anchor_block(sb, sbi->s_anchor, fileset)) | |
1707 | return lastblock; | |
1708 | } | |
1709 | /* | |
1710 | * according to spec, anchor is in either: | |
1711 | * block 256 | |
1712 | * lastblock-256 | |
1713 | * lastblock | |
1714 | * however, if the disc isn't closed, it could be 512. | |
1715 | */ | |
1716 | if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset)) | |
1717 | return lastblock; | |
1718 | /* | |
1719 | * The trouble is which block is the last one. Drives often misreport | |
1720 | * this so we try various possibilities. | |
1721 | */ | |
1722 | last[last_count++] = lastblock; | |
1723 | if (lastblock >= 1) | |
1724 | last[last_count++] = lastblock - 1; | |
1725 | last[last_count++] = lastblock + 1; | |
1726 | if (lastblock >= 2) | |
1727 | last[last_count++] = lastblock - 2; | |
1728 | if (lastblock >= 150) | |
1729 | last[last_count++] = lastblock - 150; | |
1730 | if (lastblock >= 152) | |
1731 | last[last_count++] = lastblock - 152; | |
1da177e4 | 1732 | |
40346005 JK |
1733 | for (i = 0; i < last_count; i++) { |
1734 | if (last[i] >= sb->s_bdev->bd_inode->i_size >> | |
1735 | sb->s_blocksize_bits) | |
28f7c4d4 | 1736 | continue; |
40346005 JK |
1737 | if (udf_check_anchor_block(sb, last[i], fileset)) |
1738 | return last[i]; | |
1739 | if (last[i] < 256) | |
28f7c4d4 | 1740 | continue; |
40346005 JK |
1741 | if (udf_check_anchor_block(sb, last[i] - 256, fileset)) |
1742 | return last[i]; | |
1743 | } | |
28f7c4d4 | 1744 | |
40346005 JK |
1745 | /* Finally try block 512 in case media is open */ |
1746 | if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset)) | |
1747 | return last[0]; | |
1748 | return 0; | |
1749 | } | |
28f7c4d4 | 1750 | |
40346005 JK |
1751 | /* |
1752 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from | |
1753 | * area specified by it. The function expects sbi->s_lastblock to be the last | |
1754 | * block on the media. | |
1755 | * | |
1756 | * Return 1 if ok, 0 if not found. | |
1757 | * | |
1758 | */ | |
1759 | static int udf_find_anchor(struct super_block *sb, | |
1760 | struct kernel_lb_addr *fileset) | |
1761 | { | |
1762 | sector_t lastblock; | |
1763 | struct udf_sb_info *sbi = UDF_SB(sb); | |
28f7c4d4 | 1764 | |
40346005 JK |
1765 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); |
1766 | if (lastblock) | |
1767 | goto out; | |
1da177e4 | 1768 | |
40346005 JK |
1769 | /* No anchor found? Try VARCONV conversion of block numbers */ |
1770 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
1771 | /* Firstly, we try to not convert number of the last block */ | |
1772 | lastblock = udf_scan_anchors(sb, | |
1773 | udf_variable_to_fixed(sbi->s_last_block), | |
1774 | fileset); | |
1775 | if (lastblock) | |
1776 | goto out; | |
1da177e4 | 1777 | |
40346005 JK |
1778 | /* Secondly, we try with converted number of the last block */ |
1779 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); | |
1780 | if (!lastblock) { | |
1781 | /* VARCONV didn't help. Clear it. */ | |
1782 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); | |
1783 | return 0; | |
1da177e4 | 1784 | } |
40346005 JK |
1785 | out: |
1786 | sbi->s_last_block = lastblock; | |
1787 | return 1; | |
1788 | } | |
1da177e4 | 1789 | |
40346005 JK |
1790 | /* |
1791 | * Check Volume Structure Descriptor, find Anchor block and load Volume | |
1792 | * Descriptor Sequence | |
1793 | */ | |
1794 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, | |
1795 | int silent, struct kernel_lb_addr *fileset) | |
1796 | { | |
1797 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1798 | loff_t nsr_off; | |
1799 | ||
1800 | if (!sb_set_blocksize(sb, uopt->blocksize)) { | |
1801 | if (!silent) | |
78ace70c | 1802 | udf_warn(sb, "Bad block size\n"); |
40346005 JK |
1803 | return 0; |
1804 | } | |
1805 | sbi->s_last_block = uopt->lastblock; | |
1806 | if (!uopt->novrs) { | |
1807 | /* Check that it is NSR02 compliant */ | |
1808 | nsr_off = udf_check_vsd(sb); | |
1809 | if (!nsr_off) { | |
1810 | if (!silent) | |
78ace70c | 1811 | udf_warn(sb, "No VRS found\n"); |
40346005 JK |
1812 | return 0; |
1813 | } | |
1814 | if (nsr_off == -1) | |
a983f368 | 1815 | udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n"); |
40346005 JK |
1816 | if (!sbi->s_last_block) |
1817 | sbi->s_last_block = udf_get_last_block(sb); | |
1818 | } else { | |
1819 | udf_debug("Validity check skipped because of novrs option\n"); | |
28f7c4d4 | 1820 | } |
1da177e4 | 1821 | |
40346005 JK |
1822 | /* Look for anchor block and load Volume Descriptor Sequence */ |
1823 | sbi->s_anchor = uopt->anchor; | |
1824 | if (!udf_find_anchor(sb, fileset)) { | |
1825 | if (!silent) | |
78ace70c | 1826 | udf_warn(sb, "No anchor found\n"); |
40346005 JK |
1827 | return 0; |
1828 | } | |
1829 | return 1; | |
1da177e4 LT |
1830 | } |
1831 | ||
1832 | static void udf_open_lvid(struct super_block *sb) | |
1833 | { | |
6c79e987 MS |
1834 | struct udf_sb_info *sbi = UDF_SB(sb); |
1835 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
1836 | struct logicalVolIntegrityDesc *lvid; |
1837 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
146bca72 | 1838 | |
165923fa MS |
1839 | if (!bh) |
1840 | return; | |
949f4a7c JK |
1841 | |
1842 | mutex_lock(&sbi->s_alloc_mutex); | |
165923fa MS |
1843 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
1844 | lvidiu = udf_sb_lvidiu(sbi); | |
1845 | ||
1846 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1847 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1848 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, | |
1849 | CURRENT_TIME); | |
146bca72 | 1850 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); |
165923fa MS |
1851 | |
1852 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1853 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 1854 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
1855 | |
1856 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1857 | mark_buffer_dirty(bh); | |
146bca72 | 1858 | sbi->s_lvid_dirty = 0; |
949f4a7c | 1859 | mutex_unlock(&sbi->s_alloc_mutex); |
1da177e4 LT |
1860 | } |
1861 | ||
1862 | static void udf_close_lvid(struct super_block *sb) | |
1863 | { | |
6c79e987 MS |
1864 | struct udf_sb_info *sbi = UDF_SB(sb); |
1865 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1866 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 1867 | struct logicalVolIntegrityDescImpUse *lvidiu; |
28de7948 | 1868 | |
6c79e987 MS |
1869 | if (!bh) |
1870 | return; | |
1871 | ||
949f4a7c | 1872 | mutex_lock(&sbi->s_alloc_mutex); |
6c79e987 | 1873 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
165923fa MS |
1874 | lvidiu = udf_sb_lvidiu(sbi); |
1875 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1876 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1877 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); | |
1878 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) | |
1879 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
1880 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
1881 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
1882 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
1883 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
1884 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
1885 | ||
1886 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1887 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 1888 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
1889 | |
1890 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
853a0c25 JK |
1891 | /* |
1892 | * We set buffer uptodate unconditionally here to avoid spurious | |
1893 | * warnings from mark_buffer_dirty() when previous EIO has marked | |
1894 | * the buffer as !uptodate | |
1895 | */ | |
1896 | set_buffer_uptodate(bh); | |
165923fa | 1897 | mark_buffer_dirty(bh); |
146bca72 | 1898 | sbi->s_lvid_dirty = 0; |
949f4a7c | 1899 | mutex_unlock(&sbi->s_alloc_mutex); |
1da177e4 LT |
1900 | } |
1901 | ||
d664b6af JK |
1902 | u64 lvid_get_unique_id(struct super_block *sb) |
1903 | { | |
1904 | struct buffer_head *bh; | |
1905 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1906 | struct logicalVolIntegrityDesc *lvid; | |
1907 | struct logicalVolHeaderDesc *lvhd; | |
1908 | u64 uniqueID; | |
1909 | u64 ret; | |
1910 | ||
1911 | bh = sbi->s_lvid_bh; | |
1912 | if (!bh) | |
1913 | return 0; | |
1914 | ||
1915 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1916 | lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; | |
1917 | ||
1918 | mutex_lock(&sbi->s_alloc_mutex); | |
1919 | ret = uniqueID = le64_to_cpu(lvhd->uniqueID); | |
1920 | if (!(++uniqueID & 0xFFFFFFFF)) | |
1921 | uniqueID += 16; | |
1922 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
1923 | mutex_unlock(&sbi->s_alloc_mutex); | |
1924 | mark_buffer_dirty(bh); | |
1925 | ||
1926 | return ret; | |
1da177e4 LT |
1927 | } |
1928 | ||
1da177e4 LT |
1929 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
1930 | { | |
40346005 | 1931 | int ret; |
cb00ea35 | 1932 | struct inode *inode = NULL; |
1da177e4 | 1933 | struct udf_options uopt; |
5ca4e4be | 1934 | struct kernel_lb_addr rootdir, fileset; |
1da177e4 LT |
1935 | struct udf_sb_info *sbi; |
1936 | ||
1937 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
c2ba138a EB |
1938 | uopt.uid = INVALID_UID; |
1939 | uopt.gid = INVALID_GID; | |
1da177e4 | 1940 | uopt.umask = 0; |
87bc730c MS |
1941 | uopt.fmode = UDF_INVALID_MODE; |
1942 | uopt.dmode = UDF_INVALID_MODE; | |
1da177e4 | 1943 | |
6c79e987 | 1944 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
9db9f9e3 | 1945 | if (!sbi) |
1da177e4 | 1946 | return -ENOMEM; |
28de7948 | 1947 | |
1da177e4 | 1948 | sb->s_fs_info = sbi; |
1da177e4 | 1949 | |
1e7933de | 1950 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 1951 | |
6da80894 | 1952 | if (!udf_parse_options((char *)options, &uopt, false)) |
1da177e4 LT |
1953 | goto error_out; |
1954 | ||
1955 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 1956 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
8076c363 | 1957 | udf_err(sb, "utf8 cannot be combined with iocharset\n"); |
1da177e4 LT |
1958 | goto error_out; |
1959 | } | |
1960 | #ifdef CONFIG_UDF_NLS | |
cb00ea35 | 1961 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
1962 | uopt.nls_map = load_nls_default(); |
1963 | if (!uopt.nls_map) | |
1964 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
1965 | else | |
1966 | udf_debug("Using default NLS map\n"); | |
1967 | } | |
1968 | #endif | |
1969 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
1970 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
1971 | ||
1972 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
1973 | fileset.partitionReferenceNum = 0xFFFF; | |
1974 | ||
6c79e987 MS |
1975 | sbi->s_flags = uopt.flags; |
1976 | sbi->s_uid = uopt.uid; | |
1977 | sbi->s_gid = uopt.gid; | |
1978 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
1979 | sbi->s_fmode = uopt.fmode; |
1980 | sbi->s_dmode = uopt.dmode; | |
6c79e987 | 1981 | sbi->s_nls_map = uopt.nls_map; |
c03cad24 | 1982 | rwlock_init(&sbi->s_cred_lock); |
1da177e4 | 1983 | |
cb00ea35 | 1984 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 1985 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 1986 | else |
6c79e987 | 1987 | sbi->s_session = uopt.session; |
1da177e4 | 1988 | |
6c79e987 | 1989 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 1990 | |
40346005 JK |
1991 | /* Fill in the rest of the superblock */ |
1992 | sb->s_op = &udf_sb_ops; | |
1993 | sb->s_export_op = &udf_export_ops; | |
123e9caf | 1994 | |
40346005 JK |
1995 | sb->s_magic = UDF_SUPER_MAGIC; |
1996 | sb->s_time_gran = 1000; | |
1997 | ||
1197e4df | 1998 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { |
40346005 | 1999 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 2000 | } else { |
e1defc4f | 2001 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); |
40346005 JK |
2002 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
2003 | if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { | |
1197e4df | 2004 | if (!silent) |
78ace70c JP |
2005 | pr_notice("Rescanning with blocksize %d\n", |
2006 | UDF_DEFAULT_BLOCKSIZE); | |
1197e4df | 2007 | uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; |
40346005 | 2008 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 2009 | } |
1da177e4 | 2010 | } |
40346005 | 2011 | if (!ret) { |
78ace70c | 2012 | udf_warn(sb, "No partition found (1)\n"); |
1da177e4 LT |
2013 | goto error_out; |
2014 | } | |
2015 | ||
6c79e987 | 2016 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
1da177e4 | 2017 | |
6c79e987 | 2018 | if (sbi->s_lvid_bh) { |
4b11111a MS |
2019 | struct logicalVolIntegrityDescImpUse *lvidiu = |
2020 | udf_sb_lvidiu(sbi); | |
6c79e987 MS |
2021 | uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); |
2022 | uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
4b11111a MS |
2023 | /* uint16_t maxUDFWriteRev = |
2024 | le16_to_cpu(lvidiu->maxUDFWriteRev); */ | |
1da177e4 | 2025 | |
cb00ea35 | 2026 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
78ace70c JP |
2027 | udf_err(sb, "minUDFReadRev=%x (max is %x)\n", |
2028 | le16_to_cpu(lvidiu->minUDFReadRev), | |
2029 | UDF_MAX_READ_VERSION); | |
1da177e4 | 2030 | goto error_out; |
4b11111a | 2031 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) |
1da177e4 | 2032 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 2033 | |
6c79e987 | 2034 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
2035 | |
2036 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
2037 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
2038 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
2039 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
2040 | } | |
2041 | ||
6c79e987 | 2042 | if (!sbi->s_partitions) { |
78ace70c | 2043 | udf_warn(sb, "No partition found (2)\n"); |
1da177e4 LT |
2044 | goto error_out; |
2045 | } | |
2046 | ||
4b11111a MS |
2047 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
2048 | UDF_PART_FLAG_READ_ONLY) { | |
78ace70c | 2049 | pr_notice("Partition marked readonly; forcing readonly mount\n"); |
39b3f6d6 | 2050 | sb->s_flags |= MS_RDONLY; |
c1a26e7d | 2051 | } |
39b3f6d6 | 2052 | |
cb00ea35 | 2053 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
78ace70c | 2054 | udf_warn(sb, "No fileset found\n"); |
1da177e4 LT |
2055 | goto error_out; |
2056 | } | |
2057 | ||
cb00ea35 | 2058 | if (!silent) { |
5ca4e4be | 2059 | struct timestamp ts; |
56774805 | 2060 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); |
78ace70c JP |
2061 | udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
2062 | sbi->s_volume_ident, | |
2063 | le16_to_cpu(ts.year), ts.month, ts.day, | |
56774805 | 2064 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); |
1da177e4 LT |
2065 | } |
2066 | if (!(sb->s_flags & MS_RDONLY)) | |
2067 | udf_open_lvid(sb); | |
2068 | ||
2069 | /* Assign the root inode */ | |
2070 | /* assign inodes by physical block number */ | |
2071 | /* perhaps it's not extensible enough, but for now ... */ | |
97e961fd | 2072 | inode = udf_iget(sb, &rootdir); |
cb00ea35 | 2073 | if (!inode) { |
78ace70c | 2074 | udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n", |
cb00ea35 | 2075 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
1da177e4 LT |
2076 | goto error_out; |
2077 | } | |
2078 | ||
2079 | /* Allocate a dentry for the root inode */ | |
48fde701 | 2080 | sb->s_root = d_make_root(inode); |
cb00ea35 | 2081 | if (!sb->s_root) { |
78ace70c | 2082 | udf_err(sb, "Couldn't allocate root dentry\n"); |
1da177e4 LT |
2083 | goto error_out; |
2084 | } | |
31170b6a | 2085 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
8de52778 | 2086 | sb->s_max_links = UDF_MAX_LINKS; |
1da177e4 LT |
2087 | return 0; |
2088 | ||
28de7948 | 2089 | error_out: |
6c79e987 MS |
2090 | if (sbi->s_vat_inode) |
2091 | iput(sbi->s_vat_inode); | |
1da177e4 LT |
2092 | #ifdef CONFIG_UDF_NLS |
2093 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2094 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2095 | #endif |
2096 | if (!(sb->s_flags & MS_RDONLY)) | |
2097 | udf_close_lvid(sb); | |
6c79e987 | 2098 | brelse(sbi->s_lvid_bh); |
bff943af | 2099 | udf_sb_free_partitions(sb); |
1da177e4 LT |
2100 | kfree(sbi); |
2101 | sb->s_fs_info = NULL; | |
28de7948 | 2102 | |
1da177e4 LT |
2103 | return -EINVAL; |
2104 | } | |
2105 | ||
8076c363 JP |
2106 | void _udf_err(struct super_block *sb, const char *function, |
2107 | const char *fmt, ...) | |
1da177e4 | 2108 | { |
c2bff36c | 2109 | struct va_format vaf; |
1da177e4 LT |
2110 | va_list args; |
2111 | ||
1da177e4 | 2112 | va_start(args, fmt); |
c2bff36c JP |
2113 | |
2114 | vaf.fmt = fmt; | |
2115 | vaf.va = &args; | |
2116 | ||
2117 | pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2118 | ||
1da177e4 | 2119 | va_end(args); |
1da177e4 LT |
2120 | } |
2121 | ||
a40ecd7b JP |
2122 | void _udf_warn(struct super_block *sb, const char *function, |
2123 | const char *fmt, ...) | |
1da177e4 | 2124 | { |
c2bff36c | 2125 | struct va_format vaf; |
1da177e4 LT |
2126 | va_list args; |
2127 | ||
cb00ea35 | 2128 | va_start(args, fmt); |
c2bff36c JP |
2129 | |
2130 | vaf.fmt = fmt; | |
2131 | vaf.va = &args; | |
2132 | ||
2133 | pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2134 | ||
1da177e4 | 2135 | va_end(args); |
1da177e4 LT |
2136 | } |
2137 | ||
cb00ea35 | 2138 | static void udf_put_super(struct super_block *sb) |
1da177e4 | 2139 | { |
6c79e987 | 2140 | struct udf_sb_info *sbi; |
1da177e4 | 2141 | |
6c79e987 | 2142 | sbi = UDF_SB(sb); |
6cfd0148 | 2143 | |
6c79e987 MS |
2144 | if (sbi->s_vat_inode) |
2145 | iput(sbi->s_vat_inode); | |
1da177e4 LT |
2146 | #ifdef CONFIG_UDF_NLS |
2147 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2148 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2149 | #endif |
2150 | if (!(sb->s_flags & MS_RDONLY)) | |
2151 | udf_close_lvid(sb); | |
6c79e987 | 2152 | brelse(sbi->s_lvid_bh); |
bff943af | 2153 | udf_sb_free_partitions(sb); |
1da177e4 LT |
2154 | kfree(sb->s_fs_info); |
2155 | sb->s_fs_info = NULL; | |
2156 | } | |
2157 | ||
146bca72 JK |
2158 | static int udf_sync_fs(struct super_block *sb, int wait) |
2159 | { | |
2160 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2161 | ||
2162 | mutex_lock(&sbi->s_alloc_mutex); | |
2163 | if (sbi->s_lvid_dirty) { | |
2164 | /* | |
2165 | * Blockdevice will be synced later so we don't have to submit | |
2166 | * the buffer for IO | |
2167 | */ | |
2168 | mark_buffer_dirty(sbi->s_lvid_bh); | |
146bca72 JK |
2169 | sbi->s_lvid_dirty = 0; |
2170 | } | |
2171 | mutex_unlock(&sbi->s_alloc_mutex); | |
2172 | ||
2173 | return 0; | |
2174 | } | |
2175 | ||
cb00ea35 | 2176 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2177 | { |
726c3342 | 2178 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
2179 | struct udf_sb_info *sbi = UDF_SB(sb); |
2180 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
557f5a14 | 2181 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
6c79e987 MS |
2182 | |
2183 | if (sbi->s_lvid_bh != NULL) | |
2184 | lvidiu = udf_sb_lvidiu(sbi); | |
2185 | else | |
2186 | lvidiu = NULL; | |
726c3342 | 2187 | |
1da177e4 LT |
2188 | buf->f_type = UDF_SUPER_MAGIC; |
2189 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 2190 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
2191 | buf->f_bfree = udf_count_free(sb); |
2192 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
2193 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
2194 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
2195 | + buf->f_bfree; | |
1da177e4 | 2196 | buf->f_ffree = buf->f_bfree; |
cb00ea35 | 2197 | buf->f_namelen = UDF_NAME_LEN - 2; |
557f5a14 CL |
2198 | buf->f_fsid.val[0] = (u32)id; |
2199 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
2200 | |
2201 | return 0; | |
2202 | } | |
2203 | ||
4b11111a MS |
2204 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
2205 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
2206 | { |
2207 | struct buffer_head *bh = NULL; | |
2208 | unsigned int accum = 0; | |
2209 | int index; | |
2210 | int block = 0, newblock; | |
5ca4e4be | 2211 | struct kernel_lb_addr loc; |
1da177e4 | 2212 | uint32_t bytes; |
1da177e4 LT |
2213 | uint8_t *ptr; |
2214 | uint16_t ident; | |
2215 | struct spaceBitmapDesc *bm; | |
2216 | ||
1da177e4 | 2217 | loc.logicalBlockNum = bitmap->s_extPosition; |
6c79e987 | 2218 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
97e961fd | 2219 | bh = udf_read_ptagged(sb, &loc, 0, &ident); |
1da177e4 | 2220 | |
cb00ea35 | 2221 | if (!bh) { |
78ace70c | 2222 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 | 2223 | goto out; |
cb00ea35 | 2224 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 2225 | brelse(bh); |
78ace70c | 2226 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 LT |
2227 | goto out; |
2228 | } | |
2229 | ||
2230 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2231 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
2232 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
2233 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 2234 | |
cb00ea35 | 2235 | while (bytes > 0) { |
01b954a3 MS |
2236 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
2237 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2238 | cur_bytes * 8); | |
2239 | bytes -= cur_bytes; | |
cb00ea35 | 2240 | if (bytes) { |
3bf25cb4 | 2241 | brelse(bh); |
97e961fd | 2242 | newblock = udf_get_lb_pblock(sb, &loc, ++block); |
1da177e4 | 2243 | bh = udf_tread(sb, newblock); |
cb00ea35 | 2244 | if (!bh) { |
1da177e4 LT |
2245 | udf_debug("read failed\n"); |
2246 | goto out; | |
2247 | } | |
2248 | index = 0; | |
28de7948 | 2249 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2250 | } |
2251 | } | |
3bf25cb4 | 2252 | brelse(bh); |
28de7948 | 2253 | out: |
1da177e4 LT |
2254 | return accum; |
2255 | } | |
2256 | ||
4b11111a MS |
2257 | static unsigned int udf_count_free_table(struct super_block *sb, |
2258 | struct inode *table) | |
1da177e4 LT |
2259 | { |
2260 | unsigned int accum = 0; | |
ff116fc8 | 2261 | uint32_t elen; |
5ca4e4be | 2262 | struct kernel_lb_addr eloc; |
1da177e4 | 2263 | int8_t etype; |
ff116fc8 | 2264 | struct extent_position epos; |
1da177e4 | 2265 | |
d1668fe3 | 2266 | mutex_lock(&UDF_SB(sb)->s_alloc_mutex); |
c0b34438 | 2267 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2268 | epos.offset = sizeof(struct unallocSpaceEntry); |
2269 | epos.bh = NULL; | |
1da177e4 | 2270 | |
3a71fc5d | 2271 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2272 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2273 | |
3bf25cb4 | 2274 | brelse(epos.bh); |
d1668fe3 | 2275 | mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); |
1da177e4 LT |
2276 | |
2277 | return accum; | |
2278 | } | |
cb00ea35 CG |
2279 | |
2280 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2281 | { |
2282 | unsigned int accum = 0; | |
6c79e987 MS |
2283 | struct udf_sb_info *sbi; |
2284 | struct udf_part_map *map; | |
1da177e4 | 2285 | |
6c79e987 MS |
2286 | sbi = UDF_SB(sb); |
2287 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2288 | struct logicalVolIntegrityDesc *lvid = |
2289 | (struct logicalVolIntegrityDesc *) | |
2290 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2291 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2292 | accum = le32_to_cpu( |
2293 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2294 | if (accum == 0xFFFFFFFF) |
2295 | accum = 0; | |
2296 | } | |
2297 | } | |
2298 | ||
2299 | if (accum) | |
2300 | return accum; | |
2301 | ||
6c79e987 MS |
2302 | map = &sbi->s_partmaps[sbi->s_partition]; |
2303 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2304 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2305 | map->s_uspace.s_bitmap); |
1da177e4 | 2306 | } |
6c79e987 | 2307 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
28de7948 | 2308 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2309 | map->s_fspace.s_bitmap); |
1da177e4 LT |
2310 | } |
2311 | if (accum) | |
2312 | return accum; | |
2313 | ||
6c79e987 | 2314 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2315 | accum += udf_count_free_table(sb, |
6c79e987 | 2316 | map->s_uspace.s_table); |
1da177e4 | 2317 | } |
6c79e987 | 2318 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
28de7948 | 2319 | accum += udf_count_free_table(sb, |
6c79e987 | 2320 | map->s_fspace.s_table); |
1da177e4 LT |
2321 | } |
2322 | ||
2323 | return accum; | |
2324 | } |