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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * super.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Super block routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
7 | * DESCRIPTION | |
8 | * OSTA-UDF(tm) = Optical Storage Technology Association | |
9 | * Universal Disk Format. | |
10 | * | |
11 | * This code is based on version 2.00 of the UDF specification, | |
12 | * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346]. | |
13 | * http://www.osta.org/ | |
14 | * http://www.ecma.ch/ | |
15 | * http://www.iso.org/ | |
16 | * | |
1da177e4 LT |
17 | * COPYRIGHT |
18 | * This file is distributed under the terms of the GNU General Public | |
19 | * License (GPL). Copies of the GPL can be obtained from: | |
20 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
21 | * Each contributing author retains all rights to their own work. | |
22 | * | |
23 | * (C) 1998 Dave Boynton | |
24 | * (C) 1998-2004 Ben Fennema | |
25 | * (C) 2000 Stelias Computing Inc | |
26 | * | |
27 | * HISTORY | |
28 | * | |
29 | * 09/24/98 dgb changed to allow compiling outside of kernel, and | |
30 | * added some debugging. | |
31 | * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34 | |
32 | * 10/16/98 attempting some multi-session support | |
33 | * 10/17/98 added freespace count for "df" | |
34 | * 11/11/98 gr added novrs option | |
35 | * 11/26/98 dgb added fileset,anchor mount options | |
3a71fc5d MS |
36 | * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced |
37 | * vol descs. rewrote option handling based on isofs | |
1da177e4 LT |
38 | * 12/20/98 find the free space bitmap (if it exists) |
39 | */ | |
40 | ||
cb00ea35 | 41 | #include "udfdecl.h" |
1da177e4 | 42 | |
1da177e4 LT |
43 | #include <linux/blkdev.h> |
44 | #include <linux/slab.h> | |
45 | #include <linux/kernel.h> | |
46 | #include <linux/module.h> | |
47 | #include <linux/parser.h> | |
48 | #include <linux/stat.h> | |
49 | #include <linux/cdrom.h> | |
50 | #include <linux/nls.h> | |
1da177e4 LT |
51 | #include <linux/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> |
1da177e4 LT |
59 | #include <asm/byteorder.h> |
60 | ||
1da177e4 LT |
61 | #include "udf_sb.h" |
62 | #include "udf_i.h" | |
63 | ||
64 | #include <linux/init.h> | |
65 | #include <asm/uaccess.h> | |
66 | ||
67 | #define VDS_POS_PRIMARY_VOL_DESC 0 | |
68 | #define VDS_POS_UNALLOC_SPACE_DESC 1 | |
69 | #define VDS_POS_LOGICAL_VOL_DESC 2 | |
70 | #define VDS_POS_PARTITION_DESC 3 | |
71 | #define VDS_POS_IMP_USE_VOL_DESC 4 | |
72 | #define VDS_POS_VOL_DESC_PTR 5 | |
73 | #define VDS_POS_TERMINATING_DESC 6 | |
74 | #define VDS_POS_LENGTH 7 | |
75 | ||
6da80894 MS |
76 | #define UDF_DEFAULT_BLOCKSIZE 2048 |
77 | ||
8de52778 AV |
78 | enum { UDF_MAX_LINKS = 0xffff }; |
79 | ||
1da177e4 LT |
80 | /* These are the "meat" - everything else is stuffing */ |
81 | static int udf_fill_super(struct super_block *, void *, int); | |
82 | static void udf_put_super(struct super_block *); | |
146bca72 | 83 | static int udf_sync_fs(struct super_block *, int); |
1da177e4 | 84 | static int udf_remount_fs(struct super_block *, int *, char *); |
5ca4e4be | 85 | static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); |
5ca4e4be PE |
86 | static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, |
87 | struct kernel_lb_addr *); | |
cb00ea35 | 88 | static void udf_load_fileset(struct super_block *, struct buffer_head *, |
5ca4e4be | 89 | struct kernel_lb_addr *); |
1da177e4 LT |
90 | static void udf_open_lvid(struct super_block *); |
91 | static void udf_close_lvid(struct super_block *); | |
92 | static unsigned int udf_count_free(struct super_block *); | |
726c3342 | 93 | static int udf_statfs(struct dentry *, struct kstatfs *); |
34c80b1d | 94 | static int udf_show_options(struct seq_file *, struct dentry *); |
1da177e4 | 95 | |
6c79e987 MS |
96 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) |
97 | { | |
4b11111a MS |
98 | struct logicalVolIntegrityDesc *lvid = |
99 | (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; | |
6c79e987 | 100 | __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); |
4b11111a MS |
101 | __u32 offset = number_of_partitions * 2 * |
102 | sizeof(uint32_t)/sizeof(uint8_t); | |
6c79e987 MS |
103 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
104 | } | |
105 | ||
1da177e4 | 106 | /* UDF filesystem type */ |
152a0836 AV |
107 | static struct dentry *udf_mount(struct file_system_type *fs_type, |
108 | int flags, const char *dev_name, void *data) | |
1da177e4 | 109 | { |
152a0836 | 110 | return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super); |
1da177e4 LT |
111 | } |
112 | ||
113 | static struct file_system_type udf_fstype = { | |
28de7948 CG |
114 | .owner = THIS_MODULE, |
115 | .name = "udf", | |
152a0836 | 116 | .mount = udf_mount, |
28de7948 CG |
117 | .kill_sb = kill_block_super, |
118 | .fs_flags = FS_REQUIRES_DEV, | |
1da177e4 LT |
119 | }; |
120 | ||
cb00ea35 | 121 | static struct kmem_cache *udf_inode_cachep; |
1da177e4 LT |
122 | |
123 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
124 | { | |
125 | struct udf_inode_info *ei; | |
3a71fc5d | 126 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
127 | if (!ei) |
128 | return NULL; | |
95f8797f DB |
129 | |
130 | ei->i_unique = 0; | |
131 | ei->i_lenExtents = 0; | |
132 | ei->i_next_alloc_block = 0; | |
133 | ei->i_next_alloc_goal = 0; | |
134 | ei->i_strat4096 = 0; | |
4d0fb621 | 135 | init_rwsem(&ei->i_data_sem); |
95f8797f | 136 | |
1da177e4 LT |
137 | return &ei->vfs_inode; |
138 | } | |
139 | ||
fa0d7e3d | 140 | static void udf_i_callback(struct rcu_head *head) |
1da177e4 | 141 | { |
fa0d7e3d | 142 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
143 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); |
144 | } | |
145 | ||
fa0d7e3d NP |
146 | static void udf_destroy_inode(struct inode *inode) |
147 | { | |
148 | call_rcu(&inode->i_rcu, udf_i_callback); | |
149 | } | |
150 | ||
51cc5068 | 151 | static void init_once(void *foo) |
1da177e4 | 152 | { |
cb00ea35 | 153 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 154 | |
a35afb83 CL |
155 | ei->i_ext.i_data = NULL; |
156 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
157 | } |
158 | ||
159 | static int init_inodecache(void) | |
160 | { | |
161 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
162 | sizeof(struct udf_inode_info), | |
cb00ea35 CG |
163 | 0, (SLAB_RECLAIM_ACCOUNT | |
164 | SLAB_MEM_SPREAD), | |
20c2df83 | 165 | init_once); |
28de7948 | 166 | if (!udf_inode_cachep) |
1da177e4 LT |
167 | return -ENOMEM; |
168 | return 0; | |
169 | } | |
170 | ||
171 | static void destroy_inodecache(void) | |
172 | { | |
1a1d92c1 | 173 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
174 | } |
175 | ||
176 | /* Superblock operations */ | |
ee9b6d61 | 177 | static const struct super_operations udf_sb_ops = { |
28de7948 CG |
178 | .alloc_inode = udf_alloc_inode, |
179 | .destroy_inode = udf_destroy_inode, | |
180 | .write_inode = udf_write_inode, | |
3aac2b62 | 181 | .evict_inode = udf_evict_inode, |
28de7948 | 182 | .put_super = udf_put_super, |
146bca72 | 183 | .sync_fs = udf_sync_fs, |
28de7948 CG |
184 | .statfs = udf_statfs, |
185 | .remount_fs = udf_remount_fs, | |
6da80894 | 186 | .show_options = udf_show_options, |
1da177e4 LT |
187 | }; |
188 | ||
cb00ea35 | 189 | struct udf_options { |
1da177e4 LT |
190 | unsigned char novrs; |
191 | unsigned int blocksize; | |
192 | unsigned int session; | |
193 | unsigned int lastblock; | |
194 | unsigned int anchor; | |
195 | unsigned int volume; | |
196 | unsigned short partition; | |
197 | unsigned int fileset; | |
198 | unsigned int rootdir; | |
199 | unsigned int flags; | |
faa17292 | 200 | umode_t umask; |
1da177e4 LT |
201 | gid_t gid; |
202 | uid_t uid; | |
faa17292 AV |
203 | umode_t fmode; |
204 | umode_t dmode; | |
1da177e4 LT |
205 | struct nls_table *nls_map; |
206 | }; | |
207 | ||
208 | static int __init init_udf_fs(void) | |
209 | { | |
210 | int err; | |
28de7948 | 211 | |
1da177e4 LT |
212 | err = init_inodecache(); |
213 | if (err) | |
214 | goto out1; | |
215 | err = register_filesystem(&udf_fstype); | |
216 | if (err) | |
217 | goto out; | |
28de7948 | 218 | |
1da177e4 | 219 | return 0; |
28de7948 CG |
220 | |
221 | out: | |
1da177e4 | 222 | destroy_inodecache(); |
28de7948 CG |
223 | |
224 | out1: | |
1da177e4 LT |
225 | return err; |
226 | } | |
227 | ||
228 | static void __exit exit_udf_fs(void) | |
229 | { | |
230 | unregister_filesystem(&udf_fstype); | |
231 | destroy_inodecache(); | |
232 | } | |
233 | ||
234 | module_init(init_udf_fs) | |
28de7948 | 235 | module_exit(exit_udf_fs) |
1da177e4 | 236 | |
dc5d39be MS |
237 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
238 | { | |
239 | struct udf_sb_info *sbi = UDF_SB(sb); | |
240 | ||
241 | sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), | |
242 | GFP_KERNEL); | |
243 | if (!sbi->s_partmaps) { | |
8076c363 JP |
244 | udf_err(sb, "Unable to allocate space for %d partition maps\n", |
245 | count); | |
dc5d39be MS |
246 | sbi->s_partitions = 0; |
247 | return -ENOMEM; | |
248 | } | |
249 | ||
250 | sbi->s_partitions = count; | |
251 | return 0; | |
252 | } | |
253 | ||
34c80b1d | 254 | static int udf_show_options(struct seq_file *seq, struct dentry *root) |
6da80894 | 255 | { |
34c80b1d | 256 | struct super_block *sb = root->d_sb; |
6da80894 MS |
257 | struct udf_sb_info *sbi = UDF_SB(sb); |
258 | ||
259 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
260 | seq_puts(seq, ",nostrict"); | |
1197e4df | 261 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) |
6da80894 MS |
262 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); |
263 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
264 | seq_puts(seq, ",unhide"); | |
265 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
266 | seq_puts(seq, ",undelete"); | |
267 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
268 | seq_puts(seq, ",noadinicb"); | |
269 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
270 | seq_puts(seq, ",shortad"); | |
271 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
272 | seq_puts(seq, ",uid=forget"); | |
273 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) | |
274 | seq_puts(seq, ",uid=ignore"); | |
275 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) | |
276 | seq_puts(seq, ",gid=forget"); | |
277 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) | |
278 | seq_puts(seq, ",gid=ignore"); | |
279 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) | |
280 | seq_printf(seq, ",uid=%u", sbi->s_uid); | |
281 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) | |
282 | seq_printf(seq, ",gid=%u", sbi->s_gid); | |
283 | if (sbi->s_umask != 0) | |
faa17292 | 284 | seq_printf(seq, ",umask=%ho", sbi->s_umask); |
87bc730c | 285 | if (sbi->s_fmode != UDF_INVALID_MODE) |
faa17292 | 286 | seq_printf(seq, ",mode=%ho", sbi->s_fmode); |
87bc730c | 287 | if (sbi->s_dmode != UDF_INVALID_MODE) |
faa17292 | 288 | seq_printf(seq, ",dmode=%ho", sbi->s_dmode); |
6da80894 MS |
289 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) |
290 | seq_printf(seq, ",session=%u", sbi->s_session); | |
291 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) | |
292 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
40346005 JK |
293 | if (sbi->s_anchor != 0) |
294 | seq_printf(seq, ",anchor=%u", sbi->s_anchor); | |
6da80894 MS |
295 | /* |
296 | * volume, partition, fileset and rootdir seem to be ignored | |
297 | * currently | |
298 | */ | |
299 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) | |
300 | seq_puts(seq, ",utf8"); | |
301 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
302 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
1da177e4 LT |
307 | /* |
308 | * udf_parse_options | |
309 | * | |
310 | * PURPOSE | |
311 | * Parse mount options. | |
312 | * | |
313 | * DESCRIPTION | |
314 | * The following mount options are supported: | |
315 | * | |
316 | * gid= Set the default group. | |
317 | * umask= Set the default umask. | |
7ac9bcd5 MS |
318 | * mode= Set the default file permissions. |
319 | * dmode= Set the default directory permissions. | |
1da177e4 LT |
320 | * uid= Set the default user. |
321 | * bs= Set the block size. | |
322 | * unhide Show otherwise hidden files. | |
323 | * undelete Show deleted files in lists. | |
324 | * adinicb Embed data in the inode (default) | |
325 | * noadinicb Don't embed data in the inode | |
326 | * shortad Use short ad's | |
327 | * longad Use long ad's (default) | |
328 | * nostrict Unset strict conformance | |
329 | * iocharset= Set the NLS character set | |
330 | * | |
331 | * The remaining are for debugging and disaster recovery: | |
332 | * | |
28de7948 | 333 | * novrs Skip volume sequence recognition |
1da177e4 LT |
334 | * |
335 | * The following expect a offset from 0. | |
336 | * | |
337 | * session= Set the CDROM session (default= last session) | |
338 | * anchor= Override standard anchor location. (default= 256) | |
339 | * volume= Override the VolumeDesc location. (unused) | |
340 | * partition= Override the PartitionDesc location. (unused) | |
341 | * lastblock= Set the last block of the filesystem/ | |
342 | * | |
343 | * The following expect a offset from the partition root. | |
344 | * | |
345 | * fileset= Override the fileset block location. (unused) | |
346 | * rootdir= Override the root directory location. (unused) | |
347 | * WARNING: overriding the rootdir to a non-directory may | |
348 | * yield highly unpredictable results. | |
349 | * | |
350 | * PRE-CONDITIONS | |
351 | * options Pointer to mount options string. | |
352 | * uopts Pointer to mount options variable. | |
353 | * | |
354 | * POST-CONDITIONS | |
355 | * <return> 1 Mount options parsed okay. | |
356 | * <return> 0 Error parsing mount options. | |
357 | * | |
358 | * HISTORY | |
359 | * July 1, 1997 - Andrew E. Mileski | |
360 | * Written, tested, and released. | |
361 | */ | |
28de7948 | 362 | |
1da177e4 LT |
363 | enum { |
364 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
365 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
366 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
367 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
368 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
7ac9bcd5 MS |
369 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, |
370 | Opt_fmode, Opt_dmode | |
1da177e4 LT |
371 | }; |
372 | ||
a447c093 | 373 | static const match_table_t tokens = { |
28de7948 CG |
374 | {Opt_novrs, "novrs"}, |
375 | {Opt_nostrict, "nostrict"}, | |
376 | {Opt_bs, "bs=%u"}, | |
377 | {Opt_unhide, "unhide"}, | |
378 | {Opt_undelete, "undelete"}, | |
379 | {Opt_noadinicb, "noadinicb"}, | |
380 | {Opt_adinicb, "adinicb"}, | |
381 | {Opt_shortad, "shortad"}, | |
382 | {Opt_longad, "longad"}, | |
383 | {Opt_uforget, "uid=forget"}, | |
384 | {Opt_uignore, "uid=ignore"}, | |
385 | {Opt_gforget, "gid=forget"}, | |
386 | {Opt_gignore, "gid=ignore"}, | |
387 | {Opt_gid, "gid=%u"}, | |
388 | {Opt_uid, "uid=%u"}, | |
389 | {Opt_umask, "umask=%o"}, | |
390 | {Opt_session, "session=%u"}, | |
391 | {Opt_lastblock, "lastblock=%u"}, | |
392 | {Opt_anchor, "anchor=%u"}, | |
393 | {Opt_volume, "volume=%u"}, | |
394 | {Opt_partition, "partition=%u"}, | |
395 | {Opt_fileset, "fileset=%u"}, | |
396 | {Opt_rootdir, "rootdir=%u"}, | |
397 | {Opt_utf8, "utf8"}, | |
398 | {Opt_iocharset, "iocharset=%s"}, | |
7ac9bcd5 MS |
399 | {Opt_fmode, "mode=%o"}, |
400 | {Opt_dmode, "dmode=%o"}, | |
28de7948 | 401 | {Opt_err, NULL} |
1da177e4 LT |
402 | }; |
403 | ||
6da80894 MS |
404 | static int udf_parse_options(char *options, struct udf_options *uopt, |
405 | bool remount) | |
1da177e4 LT |
406 | { |
407 | char *p; | |
408 | int option; | |
409 | ||
410 | uopt->novrs = 0; | |
1da177e4 LT |
411 | uopt->partition = 0xFFFF; |
412 | uopt->session = 0xFFFFFFFF; | |
413 | uopt->lastblock = 0; | |
414 | uopt->anchor = 0; | |
415 | uopt->volume = 0xFFFFFFFF; | |
416 | uopt->rootdir = 0xFFFFFFFF; | |
417 | uopt->fileset = 0xFFFFFFFF; | |
418 | uopt->nls_map = NULL; | |
419 | ||
420 | if (!options) | |
421 | return 1; | |
422 | ||
cb00ea35 | 423 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
424 | substring_t args[MAX_OPT_ARGS]; |
425 | int token; | |
426 | if (!*p) | |
427 | continue; | |
428 | ||
429 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
430 | switch (token) { |
431 | case Opt_novrs: | |
432 | uopt->novrs = 1; | |
4136801a | 433 | break; |
cb00ea35 CG |
434 | case Opt_bs: |
435 | if (match_int(&args[0], &option)) | |
436 | return 0; | |
437 | uopt->blocksize = option; | |
1197e4df | 438 | uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); |
cb00ea35 CG |
439 | break; |
440 | case Opt_unhide: | |
441 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
442 | break; | |
443 | case Opt_undelete: | |
444 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
445 | break; | |
446 | case Opt_noadinicb: | |
447 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
448 | break; | |
449 | case Opt_adinicb: | |
450 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
451 | break; | |
452 | case Opt_shortad: | |
453 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
454 | break; | |
455 | case Opt_longad: | |
456 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
457 | break; | |
458 | case Opt_gid: | |
459 | if (match_int(args, &option)) | |
460 | return 0; | |
461 | uopt->gid = option; | |
ca76d2d8 | 462 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
463 | break; |
464 | case Opt_uid: | |
465 | if (match_int(args, &option)) | |
466 | return 0; | |
467 | uopt->uid = option; | |
ca76d2d8 | 468 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
469 | break; |
470 | case Opt_umask: | |
471 | if (match_octal(args, &option)) | |
472 | return 0; | |
473 | uopt->umask = option; | |
474 | break; | |
475 | case Opt_nostrict: | |
476 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
477 | break; | |
478 | case Opt_session: | |
479 | if (match_int(args, &option)) | |
480 | return 0; | |
481 | uopt->session = option; | |
6da80894 MS |
482 | if (!remount) |
483 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
484 | break; |
485 | case Opt_lastblock: | |
486 | if (match_int(args, &option)) | |
487 | return 0; | |
488 | uopt->lastblock = option; | |
6da80894 MS |
489 | if (!remount) |
490 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
491 | break; |
492 | case Opt_anchor: | |
493 | if (match_int(args, &option)) | |
494 | return 0; | |
495 | uopt->anchor = option; | |
496 | break; | |
497 | case Opt_volume: | |
498 | if (match_int(args, &option)) | |
499 | return 0; | |
500 | uopt->volume = option; | |
501 | break; | |
502 | case Opt_partition: | |
503 | if (match_int(args, &option)) | |
504 | return 0; | |
505 | uopt->partition = option; | |
506 | break; | |
507 | case Opt_fileset: | |
508 | if (match_int(args, &option)) | |
509 | return 0; | |
510 | uopt->fileset = option; | |
511 | break; | |
512 | case Opt_rootdir: | |
513 | if (match_int(args, &option)) | |
514 | return 0; | |
515 | uopt->rootdir = option; | |
516 | break; | |
517 | case Opt_utf8: | |
518 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
519 | break; | |
1da177e4 | 520 | #ifdef CONFIG_UDF_NLS |
cb00ea35 CG |
521 | case Opt_iocharset: |
522 | uopt->nls_map = load_nls(args[0].from); | |
523 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
524 | break; | |
1da177e4 | 525 | #endif |
cb00ea35 CG |
526 | case Opt_uignore: |
527 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); | |
528 | break; | |
529 | case Opt_uforget: | |
530 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
531 | break; | |
532 | case Opt_gignore: | |
533 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); | |
534 | break; | |
535 | case Opt_gforget: | |
536 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
537 | break; | |
7ac9bcd5 MS |
538 | case Opt_fmode: |
539 | if (match_octal(args, &option)) | |
540 | return 0; | |
541 | uopt->fmode = option & 0777; | |
542 | break; | |
543 | case Opt_dmode: | |
544 | if (match_octal(args, &option)) | |
545 | return 0; | |
546 | uopt->dmode = option & 0777; | |
547 | break; | |
cb00ea35 | 548 | default: |
78ace70c | 549 | pr_err("bad mount option \"%s\" or missing value\n", p); |
1da177e4 LT |
550 | return 0; |
551 | } | |
552 | } | |
553 | return 1; | |
554 | } | |
555 | ||
cb00ea35 | 556 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
557 | { |
558 | struct udf_options uopt; | |
6c79e987 | 559 | struct udf_sb_info *sbi = UDF_SB(sb); |
c79d967d | 560 | int error = 0; |
1da177e4 | 561 | |
6c79e987 MS |
562 | uopt.flags = sbi->s_flags; |
563 | uopt.uid = sbi->s_uid; | |
564 | uopt.gid = sbi->s_gid; | |
565 | uopt.umask = sbi->s_umask; | |
7ac9bcd5 MS |
566 | uopt.fmode = sbi->s_fmode; |
567 | uopt.dmode = sbi->s_dmode; | |
1da177e4 | 568 | |
6da80894 | 569 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
570 | return -EINVAL; |
571 | ||
c03cad24 | 572 | write_lock(&sbi->s_cred_lock); |
6c79e987 MS |
573 | sbi->s_flags = uopt.flags; |
574 | sbi->s_uid = uopt.uid; | |
575 | sbi->s_gid = uopt.gid; | |
576 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
577 | sbi->s_fmode = uopt.fmode; |
578 | sbi->s_dmode = uopt.dmode; | |
c03cad24 | 579 | write_unlock(&sbi->s_cred_lock); |
1da177e4 | 580 | |
6c79e987 MS |
581 | if (sbi->s_lvid_bh) { |
582 | int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); | |
1da177e4 LT |
583 | if (write_rev > UDF_MAX_WRITE_VERSION) |
584 | *flags |= MS_RDONLY; | |
585 | } | |
586 | ||
c79d967d CH |
587 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
588 | goto out_unlock; | |
589 | ||
36350462 | 590 | if (*flags & MS_RDONLY) |
1da177e4 | 591 | udf_close_lvid(sb); |
36350462 | 592 | else |
1da177e4 LT |
593 | udf_open_lvid(sb); |
594 | ||
c79d967d | 595 | out_unlock: |
c79d967d | 596 | return error; |
1da177e4 LT |
597 | } |
598 | ||
40346005 JK |
599 | /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ |
600 | /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
601 | static loff_t udf_check_vsd(struct super_block *sb) | |
1da177e4 LT |
602 | { |
603 | struct volStructDesc *vsd = NULL; | |
f4bcbbd9 | 604 | loff_t sector = 32768; |
1da177e4 LT |
605 | int sectorsize; |
606 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
607 | int nsr02 = 0; |
608 | int nsr03 = 0; | |
6c79e987 | 609 | struct udf_sb_info *sbi; |
1da177e4 | 610 | |
6c79e987 | 611 | sbi = UDF_SB(sb); |
1da177e4 LT |
612 | if (sb->s_blocksize < sizeof(struct volStructDesc)) |
613 | sectorsize = sizeof(struct volStructDesc); | |
614 | else | |
615 | sectorsize = sb->s_blocksize; | |
616 | ||
6c79e987 | 617 | sector += (sbi->s_session << sb->s_blocksize_bits); |
1da177e4 LT |
618 | |
619 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
706047a7 SM |
620 | (unsigned int)(sector >> sb->s_blocksize_bits), |
621 | sb->s_blocksize); | |
1da177e4 | 622 | /* Process the sequence (if applicable) */ |
cb00ea35 | 623 | for (; !nsr02 && !nsr03; sector += sectorsize) { |
1da177e4 LT |
624 | /* Read a block */ |
625 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
626 | if (!bh) | |
627 | break; | |
628 | ||
629 | /* Look for ISO descriptors */ | |
630 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 631 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 632 | |
cb00ea35 | 633 | if (vsd->stdIdent[0] == 0) { |
3bf25cb4 | 634 | brelse(bh); |
1da177e4 | 635 | break; |
3a71fc5d MS |
636 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
637 | VSD_STD_ID_LEN)) { | |
cb00ea35 CG |
638 | switch (vsd->structType) { |
639 | case 0: | |
640 | udf_debug("ISO9660 Boot Record found\n"); | |
641 | break; | |
642 | case 1: | |
a983f368 | 643 | udf_debug("ISO9660 Primary Volume Descriptor found\n"); |
cb00ea35 CG |
644 | break; |
645 | case 2: | |
a983f368 | 646 | udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); |
cb00ea35 CG |
647 | break; |
648 | case 3: | |
a983f368 | 649 | udf_debug("ISO9660 Volume Partition Descriptor found\n"); |
cb00ea35 CG |
650 | break; |
651 | case 255: | |
a983f368 | 652 | udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); |
cb00ea35 CG |
653 | break; |
654 | default: | |
655 | udf_debug("ISO9660 VRS (%u) found\n", | |
656 | vsd->structType); | |
657 | break; | |
1da177e4 | 658 | } |
3a71fc5d MS |
659 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
660 | VSD_STD_ID_LEN)) | |
661 | ; /* nothing */ | |
662 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
663 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 664 | brelse(bh); |
1da177e4 | 665 | break; |
3a71fc5d MS |
666 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
667 | VSD_STD_ID_LEN)) | |
1da177e4 | 668 | nsr02 = sector; |
3a71fc5d MS |
669 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
670 | VSD_STD_ID_LEN)) | |
1da177e4 | 671 | nsr03 = sector; |
3bf25cb4 | 672 | brelse(bh); |
1da177e4 LT |
673 | } |
674 | ||
675 | if (nsr03) | |
676 | return nsr03; | |
677 | else if (nsr02) | |
678 | return nsr02; | |
6c79e987 | 679 | else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) |
1da177e4 LT |
680 | return -1; |
681 | else | |
682 | return 0; | |
683 | } | |
684 | ||
3a71fc5d | 685 | static int udf_find_fileset(struct super_block *sb, |
5ca4e4be PE |
686 | struct kernel_lb_addr *fileset, |
687 | struct kernel_lb_addr *root) | |
1da177e4 LT |
688 | { |
689 | struct buffer_head *bh = NULL; | |
690 | long lastblock; | |
691 | uint16_t ident; | |
6c79e987 | 692 | struct udf_sb_info *sbi; |
1da177e4 LT |
693 | |
694 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 695 | fileset->partitionReferenceNum != 0xFFFF) { |
97e961fd | 696 | bh = udf_read_ptagged(sb, fileset, 0, &ident); |
1da177e4 | 697 | |
28de7948 | 698 | if (!bh) { |
1da177e4 | 699 | return 1; |
28de7948 | 700 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 701 | brelse(bh); |
1da177e4 LT |
702 | return 1; |
703 | } | |
cb00ea35 | 704 | |
1da177e4 LT |
705 | } |
706 | ||
6c79e987 | 707 | sbi = UDF_SB(sb); |
3a71fc5d MS |
708 | if (!bh) { |
709 | /* Search backwards through the partitions */ | |
5ca4e4be | 710 | struct kernel_lb_addr newfileset; |
1da177e4 | 711 | |
28de7948 | 712 | /* --> cvg: FIXME - is it reasonable? */ |
1da177e4 | 713 | return 1; |
cb00ea35 | 714 | |
6c79e987 | 715 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
cb00ea35 CG |
716 | (newfileset.partitionReferenceNum != 0xFFFF && |
717 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
718 | fileset->partitionReferenceNum == 0xFFFF); | |
719 | newfileset.partitionReferenceNum--) { | |
6c79e987 MS |
720 | lastblock = sbi->s_partmaps |
721 | [newfileset.partitionReferenceNum] | |
722 | .s_partition_len; | |
1da177e4 LT |
723 | newfileset.logicalBlockNum = 0; |
724 | ||
cb00ea35 | 725 | do { |
97e961fd | 726 | bh = udf_read_ptagged(sb, &newfileset, 0, |
3a71fc5d | 727 | &ident); |
cb00ea35 CG |
728 | if (!bh) { |
729 | newfileset.logicalBlockNum++; | |
1da177e4 LT |
730 | continue; |
731 | } | |
732 | ||
cb00ea35 CG |
733 | switch (ident) { |
734 | case TAG_IDENT_SBD: | |
28de7948 CG |
735 | { |
736 | struct spaceBitmapDesc *sp; | |
4b11111a MS |
737 | sp = (struct spaceBitmapDesc *) |
738 | bh->b_data; | |
28de7948 CG |
739 | newfileset.logicalBlockNum += 1 + |
740 | ((le32_to_cpu(sp->numOfBytes) + | |
4b11111a MS |
741 | sizeof(struct spaceBitmapDesc) |
742 | - 1) >> sb->s_blocksize_bits); | |
28de7948 CG |
743 | brelse(bh); |
744 | break; | |
745 | } | |
cb00ea35 | 746 | case TAG_IDENT_FSD: |
28de7948 CG |
747 | *fileset = newfileset; |
748 | break; | |
cb00ea35 | 749 | default: |
28de7948 CG |
750 | newfileset.logicalBlockNum++; |
751 | brelse(bh); | |
752 | bh = NULL; | |
753 | break; | |
1da177e4 | 754 | } |
28de7948 CG |
755 | } while (newfileset.logicalBlockNum < lastblock && |
756 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
757 | fileset->partitionReferenceNum == 0xFFFF); | |
1da177e4 LT |
758 | } |
759 | } | |
760 | ||
761 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 762 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
1da177e4 | 763 | udf_debug("Fileset at block=%d, partition=%d\n", |
cb00ea35 CG |
764 | fileset->logicalBlockNum, |
765 | fileset->partitionReferenceNum); | |
1da177e4 | 766 | |
6c79e987 | 767 | sbi->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 768 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 769 | brelse(bh); |
1da177e4 LT |
770 | return 0; |
771 | } | |
772 | return 1; | |
773 | } | |
774 | ||
c0eb31ed | 775 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
776 | { |
777 | struct primaryVolDesc *pvoldesc; | |
ba9aadd8 | 778 | struct ustr *instr, *outstr; |
c0eb31ed JK |
779 | struct buffer_head *bh; |
780 | uint16_t ident; | |
ba9aadd8 MS |
781 | int ret = 1; |
782 | ||
783 | instr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
784 | if (!instr) | |
785 | return 1; | |
786 | ||
787 | outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
788 | if (!outstr) | |
789 | goto out1; | |
c0eb31ed JK |
790 | |
791 | bh = udf_read_tagged(sb, block, block, &ident); | |
792 | if (!bh) | |
ba9aadd8 MS |
793 | goto out2; |
794 | ||
c0eb31ed | 795 | BUG_ON(ident != TAG_IDENT_PVD); |
1da177e4 LT |
796 | |
797 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
798 | ||
56774805 MS |
799 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
800 | pvoldesc->recordingDateAndTime)) { | |
af15a298 | 801 | #ifdef UDFFS_DEBUG |
5ca4e4be | 802 | struct timestamp *ts = &pvoldesc->recordingDateAndTime; |
a983f368 | 803 | udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", |
af15a298 MS |
804 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, |
805 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
806 | #endif | |
1da177e4 LT |
807 | } |
808 | ||
ba9aadd8 MS |
809 | if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) |
810 | if (udf_CS0toUTF8(outstr, instr)) { | |
811 | strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, | |
812 | outstr->u_len > 31 ? 31 : outstr->u_len); | |
4b11111a | 813 | udf_debug("volIdent[] = '%s'\n", |
a983f368 | 814 | UDF_SB(sb)->s_volume_ident); |
1da177e4 | 815 | } |
1da177e4 | 816 | |
ba9aadd8 MS |
817 | if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) |
818 | if (udf_CS0toUTF8(outstr, instr)) | |
819 | udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); | |
c0eb31ed JK |
820 | |
821 | brelse(bh); | |
ba9aadd8 MS |
822 | ret = 0; |
823 | out2: | |
824 | kfree(outstr); | |
825 | out1: | |
826 | kfree(instr); | |
827 | return ret; | |
1da177e4 LT |
828 | } |
829 | ||
3080a74e NJ |
830 | struct inode *udf_find_metadata_inode_efe(struct super_block *sb, |
831 | u32 meta_file_loc, u32 partition_num) | |
832 | { | |
833 | struct kernel_lb_addr addr; | |
834 | struct inode *metadata_fe; | |
835 | ||
836 | addr.logicalBlockNum = meta_file_loc; | |
837 | addr.partitionReferenceNum = partition_num; | |
838 | ||
839 | metadata_fe = udf_iget(sb, &addr); | |
840 | ||
841 | if (metadata_fe == NULL) | |
842 | udf_warn(sb, "metadata inode efe not found\n"); | |
843 | else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { | |
844 | udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); | |
845 | iput(metadata_fe); | |
846 | metadata_fe = NULL; | |
847 | } | |
848 | ||
849 | return metadata_fe; | |
850 | } | |
851 | ||
bfb257a5 JK |
852 | static int udf_load_metadata_files(struct super_block *sb, int partition) |
853 | { | |
854 | struct udf_sb_info *sbi = UDF_SB(sb); | |
855 | struct udf_part_map *map; | |
856 | struct udf_meta_data *mdata; | |
5ca4e4be | 857 | struct kernel_lb_addr addr; |
bfb257a5 JK |
858 | |
859 | map = &sbi->s_partmaps[partition]; | |
860 | mdata = &map->s_type_specific.s_metadata; | |
861 | ||
862 | /* metadata address */ | |
bfb257a5 | 863 | udf_debug("Metadata file location: block = %d part = %d\n", |
3080a74e | 864 | mdata->s_meta_file_loc, map->s_partition_num); |
bfb257a5 | 865 | |
3080a74e NJ |
866 | mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb, |
867 | mdata->s_meta_file_loc, map->s_partition_num); | |
bfb257a5 JK |
868 | |
869 | if (mdata->s_metadata_fe == NULL) { | |
3080a74e NJ |
870 | /* mirror file entry */ |
871 | udf_debug("Mirror metadata file location: block = %d part = %d\n", | |
872 | mdata->s_mirror_file_loc, map->s_partition_num); | |
bfb257a5 | 873 | |
3080a74e NJ |
874 | mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb, |
875 | mdata->s_mirror_file_loc, map->s_partition_num); | |
bfb257a5 | 876 | |
3080a74e NJ |
877 | if (mdata->s_mirror_fe == NULL) { |
878 | udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); | |
bfb257a5 | 879 | goto error_exit; |
3080a74e | 880 | } |
bfb257a5 JK |
881 | } |
882 | ||
883 | /* | |
884 | * bitmap file entry | |
885 | * Note: | |
886 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) | |
887 | */ | |
888 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { | |
889 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; | |
890 | addr.partitionReferenceNum = map->s_partition_num; | |
891 | ||
892 | udf_debug("Bitmap file location: block = %d part = %d\n", | |
a983f368 | 893 | addr.logicalBlockNum, addr.partitionReferenceNum); |
bfb257a5 | 894 | |
97e961fd | 895 | mdata->s_bitmap_fe = udf_iget(sb, &addr); |
bfb257a5 JK |
896 | |
897 | if (mdata->s_bitmap_fe == NULL) { | |
898 | if (sb->s_flags & MS_RDONLY) | |
a40ecd7b | 899 | udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); |
bfb257a5 | 900 | else { |
8076c363 | 901 | udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); |
bfb257a5 JK |
902 | goto error_exit; |
903 | } | |
904 | } | |
905 | } | |
906 | ||
907 | udf_debug("udf_load_metadata_files Ok\n"); | |
908 | ||
909 | return 0; | |
910 | ||
911 | error_exit: | |
912 | return 1; | |
913 | } | |
914 | ||
28de7948 | 915 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
5ca4e4be | 916 | struct kernel_lb_addr *root) |
1da177e4 LT |
917 | { |
918 | struct fileSetDesc *fset; | |
919 | ||
920 | fset = (struct fileSetDesc *)bh->b_data; | |
921 | ||
922 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
923 | ||
6c79e987 | 924 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 925 | |
cb00ea35 CG |
926 | udf_debug("Rootdir at block=%d, partition=%d\n", |
927 | root->logicalBlockNum, root->partitionReferenceNum); | |
1da177e4 LT |
928 | } |
929 | ||
883cb9d1 MS |
930 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
931 | { | |
932 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
933 | return DIV_ROUND_UP(map->s_partition_len + |
934 | (sizeof(struct spaceBitmapDesc) << 3), | |
935 | sb->s_blocksize * 8); | |
883cb9d1 MS |
936 | } |
937 | ||
66e1da3f MS |
938 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
939 | { | |
66e1da3f MS |
940 | struct udf_bitmap *bitmap; |
941 | int nr_groups; | |
942 | int size; | |
943 | ||
883cb9d1 | 944 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
945 | size = sizeof(struct udf_bitmap) + |
946 | (sizeof(struct buffer_head *) * nr_groups); | |
947 | ||
948 | if (size <= PAGE_SIZE) | |
ed2ae6f6 | 949 | bitmap = kzalloc(size, GFP_KERNEL); |
66e1da3f | 950 | else |
ed2ae6f6 | 951 | bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ |
66e1da3f | 952 | |
75b09e02 | 953 | if (bitmap == NULL) |
66e1da3f | 954 | return NULL; |
66e1da3f | 955 | |
66e1da3f MS |
956 | bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); |
957 | bitmap->s_nr_groups = nr_groups; | |
958 | return bitmap; | |
959 | } | |
960 | ||
3fb38dfa JK |
961 | static int udf_fill_partdesc_info(struct super_block *sb, |
962 | struct partitionDesc *p, int p_index) | |
1da177e4 | 963 | { |
6c79e987 | 964 | struct udf_part_map *map; |
165923fa | 965 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 966 | struct partitionHeaderDesc *phd; |
165923fa | 967 | |
3fb38dfa | 968 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
969 | |
970 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
971 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
972 | ||
973 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
974 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
975 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
976 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
977 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
978 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
979 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
980 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
981 | ||
a983f368 JP |
982 | udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n", |
983 | p_index, map->s_partition_type, | |
984 | map->s_partition_root, map->s_partition_len); | |
165923fa MS |
985 | |
986 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
987 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
3fb38dfa | 988 | return 0; |
165923fa MS |
989 | |
990 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
991 | if (phd->unallocSpaceTable.extLength) { | |
5ca4e4be | 992 | struct kernel_lb_addr loc = { |
165923fa MS |
993 | .logicalBlockNum = le32_to_cpu( |
994 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 995 | .partitionReferenceNum = p_index, |
165923fa MS |
996 | }; |
997 | ||
97e961fd | 998 | map->s_uspace.s_table = udf_iget(sb, &loc); |
165923fa MS |
999 | if (!map->s_uspace.s_table) { |
1000 | udf_debug("cannot load unallocSpaceTable (part %d)\n", | |
a983f368 | 1001 | p_index); |
3fb38dfa | 1002 | return 1; |
165923fa MS |
1003 | } |
1004 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; | |
1005 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", | |
a983f368 | 1006 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1007 | } |
1008 | ||
1009 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1010 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1011 | if (!bitmap) | |
1012 | return 1; | |
165923fa | 1013 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1014 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1015 | phd->unallocSpaceBitmap.extLength); |
2e0838fd | 1016 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1017 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1018 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
a983f368 JP |
1019 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", |
1020 | p_index, bitmap->s_extPosition); | |
165923fa MS |
1021 | } |
1022 | ||
1023 | if (phd->partitionIntegrityTable.extLength) | |
3fb38dfa | 1024 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); |
165923fa MS |
1025 | |
1026 | if (phd->freedSpaceTable.extLength) { | |
5ca4e4be | 1027 | struct kernel_lb_addr loc = { |
165923fa MS |
1028 | .logicalBlockNum = le32_to_cpu( |
1029 | phd->freedSpaceTable.extPosition), | |
3fb38dfa | 1030 | .partitionReferenceNum = p_index, |
165923fa MS |
1031 | }; |
1032 | ||
97e961fd | 1033 | map->s_fspace.s_table = udf_iget(sb, &loc); |
165923fa | 1034 | if (!map->s_fspace.s_table) { |
3fb38dfa | 1035 | udf_debug("cannot load freedSpaceTable (part %d)\n", |
a983f368 | 1036 | p_index); |
3fb38dfa | 1037 | return 1; |
165923fa MS |
1038 | } |
1039 | ||
1040 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; | |
1041 | udf_debug("freedSpaceTable (part %d) @ %ld\n", | |
a983f368 | 1042 | p_index, map->s_fspace.s_table->i_ino); |
165923fa MS |
1043 | } |
1044 | ||
1045 | if (phd->freedSpaceBitmap.extLength) { | |
3fb38dfa JK |
1046 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1047 | if (!bitmap) | |
1048 | return 1; | |
165923fa | 1049 | map->s_fspace.s_bitmap = bitmap; |
2e0838fd | 1050 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1051 | phd->freedSpaceBitmap.extLength); |
2e0838fd | 1052 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1053 | phd->freedSpaceBitmap.extPosition); |
2e0838fd | 1054 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
a983f368 JP |
1055 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", |
1056 | p_index, bitmap->s_extPosition); | |
165923fa | 1057 | } |
3fb38dfa JK |
1058 | return 0; |
1059 | } | |
1060 | ||
e971b0b9 JK |
1061 | static void udf_find_vat_block(struct super_block *sb, int p_index, |
1062 | int type1_index, sector_t start_block) | |
38b74a53 JK |
1063 | { |
1064 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1065 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
e971b0b9 | 1066 | sector_t vat_block; |
5ca4e4be | 1067 | struct kernel_lb_addr ino; |
e971b0b9 JK |
1068 | |
1069 | /* | |
1070 | * VAT file entry is in the last recorded block. Some broken disks have | |
1071 | * it a few blocks before so try a bit harder... | |
1072 | */ | |
1073 | ino.partitionReferenceNum = type1_index; | |
1074 | for (vat_block = start_block; | |
1075 | vat_block >= map->s_partition_root && | |
1076 | vat_block >= start_block - 3 && | |
1077 | !sbi->s_vat_inode; vat_block--) { | |
1078 | ino.logicalBlockNum = vat_block - map->s_partition_root; | |
1079 | sbi->s_vat_inode = udf_iget(sb, &ino); | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) | |
1084 | { | |
1085 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1086 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
fa5e0815 JK |
1087 | struct buffer_head *bh = NULL; |
1088 | struct udf_inode_info *vati; | |
1089 | uint32_t pos; | |
1090 | struct virtualAllocationTable20 *vat20; | |
4bf17af0 | 1091 | sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; |
38b74a53 | 1092 | |
e971b0b9 | 1093 | udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); |
4bf17af0 JK |
1094 | if (!sbi->s_vat_inode && |
1095 | sbi->s_last_block != blocks - 1) { | |
78ace70c JP |
1096 | pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", |
1097 | (unsigned long)sbi->s_last_block, | |
1098 | (unsigned long)blocks - 1); | |
e971b0b9 | 1099 | udf_find_vat_block(sb, p_index, type1_index, blocks - 1); |
4bf17af0 | 1100 | } |
38b74a53 JK |
1101 | if (!sbi->s_vat_inode) |
1102 | return 1; | |
1103 | ||
1104 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
47c9358a | 1105 | map->s_type_specific.s_virtual.s_start_offset = 0; |
38b74a53 JK |
1106 | map->s_type_specific.s_virtual.s_num_entries = |
1107 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1108 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
fa5e0815 JK |
1109 | vati = UDF_I(sbi->s_vat_inode); |
1110 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1111 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1112 | bh = sb_bread(sb, pos); | |
1113 | if (!bh) | |
1114 | return 1; | |
1115 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; | |
1116 | } else { | |
1117 | vat20 = (struct virtualAllocationTable20 *) | |
1118 | vati->i_ext.i_data; | |
1119 | } | |
38b74a53 | 1120 | |
38b74a53 | 1121 | map->s_type_specific.s_virtual.s_start_offset = |
47c9358a | 1122 | le16_to_cpu(vat20->lengthHeader); |
38b74a53 JK |
1123 | map->s_type_specific.s_virtual.s_num_entries = |
1124 | (sbi->s_vat_inode->i_size - | |
1125 | map->s_type_specific.s_virtual. | |
1126 | s_start_offset) >> 2; | |
1127 | brelse(bh); | |
1128 | } | |
1129 | return 0; | |
1130 | } | |
1131 | ||
3fb38dfa JK |
1132 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
1133 | { | |
1134 | struct buffer_head *bh; | |
1135 | struct partitionDesc *p; | |
1136 | struct udf_part_map *map; | |
1137 | struct udf_sb_info *sbi = UDF_SB(sb); | |
38b74a53 | 1138 | int i, type1_idx; |
3fb38dfa JK |
1139 | uint16_t partitionNumber; |
1140 | uint16_t ident; | |
1141 | int ret = 0; | |
1142 | ||
1143 | bh = udf_read_tagged(sb, block, block, &ident); | |
1144 | if (!bh) | |
1145 | return 1; | |
1146 | if (ident != TAG_IDENT_PD) | |
1147 | goto out_bh; | |
1148 | ||
1149 | p = (struct partitionDesc *)bh->b_data; | |
1150 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
38b74a53 | 1151 | |
bfb257a5 | 1152 | /* First scan for TYPE1, SPARABLE and METADATA partitions */ |
3fb38dfa JK |
1153 | for (i = 0; i < sbi->s_partitions; i++) { |
1154 | map = &sbi->s_partmaps[i]; | |
1155 | udf_debug("Searching map: (%d == %d)\n", | |
1156 | map->s_partition_num, partitionNumber); | |
38b74a53 JK |
1157 | if (map->s_partition_num == partitionNumber && |
1158 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1159 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
3fb38dfa JK |
1160 | break; |
1161 | } | |
1162 | ||
38b74a53 | 1163 | if (i >= sbi->s_partitions) { |
3fb38dfa JK |
1164 | udf_debug("Partition (%d) not found in partition map\n", |
1165 | partitionNumber); | |
1166 | goto out_bh; | |
1167 | } | |
165923fa | 1168 | |
3fb38dfa | 1169 | ret = udf_fill_partdesc_info(sb, p, i); |
38b74a53 JK |
1170 | |
1171 | /* | |
bfb257a5 JK |
1172 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
1173 | * PHYSICAL partitions are already set up | |
38b74a53 JK |
1174 | */ |
1175 | type1_idx = i; | |
1176 | for (i = 0; i < sbi->s_partitions; i++) { | |
1177 | map = &sbi->s_partmaps[i]; | |
1178 | ||
1179 | if (map->s_partition_num == partitionNumber && | |
1180 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
bfb257a5 JK |
1181 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
1182 | map->s_partition_type == UDF_METADATA_MAP25)) | |
38b74a53 JK |
1183 | break; |
1184 | } | |
1185 | ||
1186 | if (i >= sbi->s_partitions) | |
1187 | goto out_bh; | |
1188 | ||
1189 | ret = udf_fill_partdesc_info(sb, p, i); | |
1190 | if (ret) | |
1191 | goto out_bh; | |
1192 | ||
bfb257a5 JK |
1193 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
1194 | ret = udf_load_metadata_files(sb, i); | |
1195 | if (ret) { | |
78ace70c JP |
1196 | udf_err(sb, "error loading MetaData partition map %d\n", |
1197 | i); | |
bfb257a5 JK |
1198 | goto out_bh; |
1199 | } | |
1200 | } else { | |
1201 | ret = udf_load_vat(sb, i, type1_idx); | |
1202 | if (ret) | |
1203 | goto out_bh; | |
1204 | /* | |
1205 | * Mark filesystem read-only if we have a partition with | |
1206 | * virtual map since we don't handle writing to it (we | |
1207 | * overwrite blocks instead of relocating them). | |
1208 | */ | |
1209 | sb->s_flags |= MS_RDONLY; | |
78ace70c | 1210 | pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n"); |
bfb257a5 | 1211 | } |
c0eb31ed | 1212 | out_bh: |
2e0838fd | 1213 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1214 | brelse(bh); |
1215 | return ret; | |
1da177e4 LT |
1216 | } |
1217 | ||
c0eb31ed | 1218 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
5ca4e4be | 1219 | struct kernel_lb_addr *fileset) |
1da177e4 LT |
1220 | { |
1221 | struct logicalVolDesc *lvd; | |
1222 | int i, j, offset; | |
1223 | uint8_t type; | |
6c79e987 | 1224 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1225 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1226 | uint16_t ident; |
1227 | struct buffer_head *bh; | |
1228 | int ret = 0; | |
1da177e4 | 1229 | |
c0eb31ed JK |
1230 | bh = udf_read_tagged(sb, block, block, &ident); |
1231 | if (!bh) | |
1232 | return 1; | |
1233 | BUG_ON(ident != TAG_IDENT_LVD); | |
1da177e4 LT |
1234 | lvd = (struct logicalVolDesc *)bh->b_data; |
1235 | ||
dc5d39be | 1236 | i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
c0eb31ed JK |
1237 | if (i != 0) { |
1238 | ret = i; | |
1239 | goto out_bh; | |
1240 | } | |
1da177e4 | 1241 | |
cb00ea35 | 1242 | for (i = 0, offset = 0; |
6c79e987 | 1243 | i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength); |
4b11111a MS |
1244 | i++, offset += gpm->partitionMapLength) { |
1245 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1246 | gpm = (struct genericPartitionMap *) | |
1247 | &(lvd->partitionMaps[offset]); | |
1248 | type = gpm->partitionMapType; | |
cb00ea35 | 1249 | if (type == 1) { |
4b11111a MS |
1250 | struct genericPartitionMap1 *gpm1 = |
1251 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1252 | map->s_partition_type = UDF_TYPE1_MAP15; |
1253 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1254 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1255 | map->s_partition_func = NULL; | |
cb00ea35 | 1256 | } else if (type == 2) { |
4b11111a MS |
1257 | struct udfPartitionMap2 *upm2 = |
1258 | (struct udfPartitionMap2 *)gpm; | |
1259 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1260 | strlen(UDF_ID_VIRTUAL))) { | |
1261 | u16 suf = | |
1262 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1263 | identSuffix)[0]); | |
c82a1275 | 1264 | if (suf < 0x0200) { |
4b11111a MS |
1265 | map->s_partition_type = |
1266 | UDF_VIRTUAL_MAP15; | |
1267 | map->s_partition_func = | |
1268 | udf_get_pblock_virt15; | |
c82a1275 | 1269 | } else { |
4b11111a MS |
1270 | map->s_partition_type = |
1271 | UDF_VIRTUAL_MAP20; | |
1272 | map->s_partition_func = | |
1273 | udf_get_pblock_virt20; | |
1da177e4 | 1274 | } |
4b11111a MS |
1275 | } else if (!strncmp(upm2->partIdent.ident, |
1276 | UDF_ID_SPARABLE, | |
1277 | strlen(UDF_ID_SPARABLE))) { | |
1da177e4 | 1278 | uint32_t loc; |
1da177e4 | 1279 | struct sparingTable *st; |
4b11111a MS |
1280 | struct sparablePartitionMap *spm = |
1281 | (struct sparablePartitionMap *)gpm; | |
28de7948 | 1282 | |
6c79e987 | 1283 | map->s_partition_type = UDF_SPARABLE_MAP15; |
4b11111a MS |
1284 | map->s_type_specific.s_sparing.s_packet_len = |
1285 | le16_to_cpu(spm->packetLength); | |
cb00ea35 | 1286 | for (j = 0; j < spm->numSparingTables; j++) { |
4b11111a MS |
1287 | struct buffer_head *bh2; |
1288 | ||
1289 | loc = le32_to_cpu( | |
1290 | spm->locSparingTable[j]); | |
1291 | bh2 = udf_read_tagged(sb, loc, loc, | |
1292 | &ident); | |
1293 | map->s_type_specific.s_sparing. | |
1294 | s_spar_map[j] = bh2; | |
1295 | ||
165923fa MS |
1296 | if (bh2 == NULL) |
1297 | continue; | |
1298 | ||
1299 | st = (struct sparingTable *)bh2->b_data; | |
1300 | if (ident != 0 || strncmp( | |
1301 | st->sparingIdent.ident, | |
1302 | UDF_ID_SPARING, | |
1303 | strlen(UDF_ID_SPARING))) { | |
1304 | brelse(bh2); | |
1305 | map->s_type_specific.s_sparing. | |
1306 | s_spar_map[j] = NULL; | |
1da177e4 LT |
1307 | } |
1308 | } | |
6c79e987 | 1309 | map->s_partition_func = udf_get_pblock_spar15; |
bfb257a5 JK |
1310 | } else if (!strncmp(upm2->partIdent.ident, |
1311 | UDF_ID_METADATA, | |
1312 | strlen(UDF_ID_METADATA))) { | |
1313 | struct udf_meta_data *mdata = | |
1314 | &map->s_type_specific.s_metadata; | |
1315 | struct metadataPartitionMap *mdm = | |
1316 | (struct metadataPartitionMap *) | |
1317 | &(lvd->partitionMaps[offset]); | |
a983f368 JP |
1318 | udf_debug("Parsing Logical vol part %d type %d id=%s\n", |
1319 | i, type, UDF_ID_METADATA); | |
bfb257a5 JK |
1320 | |
1321 | map->s_partition_type = UDF_METADATA_MAP25; | |
1322 | map->s_partition_func = udf_get_pblock_meta25; | |
1323 | ||
1324 | mdata->s_meta_file_loc = | |
1325 | le32_to_cpu(mdm->metadataFileLoc); | |
1326 | mdata->s_mirror_file_loc = | |
1327 | le32_to_cpu(mdm->metadataMirrorFileLoc); | |
1328 | mdata->s_bitmap_file_loc = | |
1329 | le32_to_cpu(mdm->metadataBitmapFileLoc); | |
1330 | mdata->s_alloc_unit_size = | |
1331 | le32_to_cpu(mdm->allocUnitSize); | |
1332 | mdata->s_align_unit_size = | |
1333 | le16_to_cpu(mdm->alignUnitSize); | |
ed47a7d0 JK |
1334 | if (mdm->flags & 0x01) |
1335 | mdata->s_flags |= MF_DUPLICATE_MD; | |
bfb257a5 JK |
1336 | |
1337 | udf_debug("Metadata Ident suffix=0x%x\n", | |
a983f368 JP |
1338 | le16_to_cpu(*(__le16 *) |
1339 | mdm->partIdent.identSuffix)); | |
bfb257a5 | 1340 | udf_debug("Metadata part num=%d\n", |
a983f368 | 1341 | le16_to_cpu(mdm->partitionNum)); |
bfb257a5 | 1342 | udf_debug("Metadata part alloc unit size=%d\n", |
a983f368 | 1343 | le32_to_cpu(mdm->allocUnitSize)); |
bfb257a5 | 1344 | udf_debug("Metadata file loc=%d\n", |
a983f368 | 1345 | le32_to_cpu(mdm->metadataFileLoc)); |
bfb257a5 | 1346 | udf_debug("Mirror file loc=%d\n", |
a983f368 | 1347 | le32_to_cpu(mdm->metadataMirrorFileLoc)); |
bfb257a5 | 1348 | udf_debug("Bitmap file loc=%d\n", |
a983f368 | 1349 | le32_to_cpu(mdm->metadataBitmapFileLoc)); |
ed47a7d0 JK |
1350 | udf_debug("Flags: %d %d\n", |
1351 | mdata->s_flags, mdm->flags); | |
cb00ea35 | 1352 | } else { |
3a71fc5d MS |
1353 | udf_debug("Unknown ident: %s\n", |
1354 | upm2->partIdent.ident); | |
1da177e4 LT |
1355 | continue; |
1356 | } | |
6c79e987 MS |
1357 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1358 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 LT |
1359 | } |
1360 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
a983f368 | 1361 | i, map->s_partition_num, type, map->s_volumeseqnum); |
1da177e4 LT |
1362 | } |
1363 | ||
cb00ea35 | 1364 | if (fileset) { |
5ca4e4be | 1365 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1366 | |
1367 | *fileset = lelb_to_cpu(la->extLocation); | |
a983f368 JP |
1368 | udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n", |
1369 | fileset->logicalBlockNum, | |
28de7948 | 1370 | fileset->partitionReferenceNum); |
1da177e4 LT |
1371 | } |
1372 | if (lvd->integritySeqExt.extLength) | |
1373 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
28de7948 | 1374 | |
c0eb31ed JK |
1375 | out_bh: |
1376 | brelse(bh); | |
1377 | return ret; | |
1da177e4 LT |
1378 | } |
1379 | ||
1380 | /* | |
1381 | * udf_load_logicalvolint | |
1382 | * | |
1383 | */ | |
5ca4e4be | 1384 | static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) |
1da177e4 LT |
1385 | { |
1386 | struct buffer_head *bh = NULL; | |
1387 | uint16_t ident; | |
6c79e987 MS |
1388 | struct udf_sb_info *sbi = UDF_SB(sb); |
1389 | struct logicalVolIntegrityDesc *lvid; | |
1da177e4 LT |
1390 | |
1391 | while (loc.extLength > 0 && | |
cb00ea35 CG |
1392 | (bh = udf_read_tagged(sb, loc.extLocation, |
1393 | loc.extLocation, &ident)) && | |
1394 | ident == TAG_IDENT_LVID) { | |
6c79e987 MS |
1395 | sbi->s_lvid_bh = bh; |
1396 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
cb00ea35 | 1397 | |
6c79e987 | 1398 | if (lvid->nextIntegrityExt.extLength) |
3a71fc5d | 1399 | udf_load_logicalvolint(sb, |
6c79e987 | 1400 | leea_to_cpu(lvid->nextIntegrityExt)); |
cb00ea35 | 1401 | |
6c79e987 | 1402 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1403 | brelse(bh); |
1da177e4 | 1404 | loc.extLength -= sb->s_blocksize; |
cb00ea35 | 1405 | loc.extLocation++; |
1da177e4 | 1406 | } |
6c79e987 | 1407 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1408 | brelse(bh); |
1da177e4 LT |
1409 | } |
1410 | ||
1411 | /* | |
1412 | * udf_process_sequence | |
1413 | * | |
1414 | * PURPOSE | |
1415 | * Process a main/reserve volume descriptor sequence. | |
1416 | * | |
1417 | * PRE-CONDITIONS | |
1418 | * sb Pointer to _locked_ superblock. | |
1419 | * block First block of first extent of the sequence. | |
1420 | * lastblock Lastblock of first extent of the sequence. | |
1421 | * | |
1422 | * HISTORY | |
1423 | * July 1, 1997 - Andrew E. Mileski | |
1424 | * Written, tested, and released. | |
1425 | */ | |
200a3592 | 1426 | static noinline int udf_process_sequence(struct super_block *sb, long block, |
5ca4e4be | 1427 | long lastblock, struct kernel_lb_addr *fileset) |
1da177e4 LT |
1428 | { |
1429 | struct buffer_head *bh = NULL; | |
1430 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
4b11111a | 1431 | struct udf_vds_record *curr; |
1da177e4 LT |
1432 | struct generic_desc *gd; |
1433 | struct volDescPtr *vdp; | |
cb00ea35 | 1434 | int done = 0; |
1da177e4 LT |
1435 | uint32_t vdsn; |
1436 | uint16_t ident; | |
1437 | long next_s = 0, next_e = 0; | |
1438 | ||
1439 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1440 | ||
c0eb31ed JK |
1441 | /* |
1442 | * Read the main descriptor sequence and find which descriptors | |
1443 | * are in it. | |
1444 | */ | |
cb00ea35 | 1445 | for (; (!done && block <= lastblock); block++) { |
1da177e4 LT |
1446 | |
1447 | bh = udf_read_tagged(sb, block, block, &ident); | |
c0eb31ed | 1448 | if (!bh) { |
78ace70c JP |
1449 | udf_err(sb, |
1450 | "Block %llu of volume descriptor sequence is corrupted or we could not read it\n", | |
1451 | (unsigned long long)block); | |
c0eb31ed JK |
1452 | return 1; |
1453 | } | |
1da177e4 LT |
1454 | |
1455 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1456 | gd = (struct generic_desc *)bh->b_data; | |
1457 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1458 | switch (ident) { |
28de7948 | 1459 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
4b11111a MS |
1460 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
1461 | if (vdsn >= curr->volDescSeqNum) { | |
1462 | curr->volDescSeqNum = vdsn; | |
1463 | curr->block = block; | |
cb00ea35 CG |
1464 | } |
1465 | break; | |
28de7948 | 1466 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
4b11111a MS |
1467 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
1468 | if (vdsn >= curr->volDescSeqNum) { | |
1469 | curr->volDescSeqNum = vdsn; | |
1470 | curr->block = block; | |
cb00ea35 CG |
1471 | |
1472 | vdp = (struct volDescPtr *)bh->b_data; | |
4b11111a MS |
1473 | next_s = le32_to_cpu( |
1474 | vdp->nextVolDescSeqExt.extLocation); | |
1475 | next_e = le32_to_cpu( | |
1476 | vdp->nextVolDescSeqExt.extLength); | |
cb00ea35 CG |
1477 | next_e = next_e >> sb->s_blocksize_bits; |
1478 | next_e += next_s; | |
1479 | } | |
1480 | break; | |
28de7948 | 1481 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
4b11111a MS |
1482 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
1483 | if (vdsn >= curr->volDescSeqNum) { | |
1484 | curr->volDescSeqNum = vdsn; | |
1485 | curr->block = block; | |
cb00ea35 CG |
1486 | } |
1487 | break; | |
28de7948 | 1488 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
4b11111a MS |
1489 | curr = &vds[VDS_POS_PARTITION_DESC]; |
1490 | if (!curr->block) | |
1491 | curr->block = block; | |
cb00ea35 | 1492 | break; |
28de7948 | 1493 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
4b11111a MS |
1494 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
1495 | if (vdsn >= curr->volDescSeqNum) { | |
1496 | curr->volDescSeqNum = vdsn; | |
1497 | curr->block = block; | |
cb00ea35 CG |
1498 | } |
1499 | break; | |
28de7948 | 1500 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
4b11111a MS |
1501 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
1502 | if (vdsn >= curr->volDescSeqNum) { | |
1503 | curr->volDescSeqNum = vdsn; | |
1504 | curr->block = block; | |
cb00ea35 CG |
1505 | } |
1506 | break; | |
28de7948 | 1507 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
cb00ea35 CG |
1508 | vds[VDS_POS_TERMINATING_DESC].block = block; |
1509 | if (next_e) { | |
1510 | block = next_s; | |
1511 | lastblock = next_e; | |
1512 | next_s = next_e = 0; | |
4b11111a | 1513 | } else |
cb00ea35 CG |
1514 | done = 1; |
1515 | break; | |
1da177e4 | 1516 | } |
3bf25cb4 | 1517 | brelse(bh); |
1da177e4 | 1518 | } |
c0eb31ed JK |
1519 | /* |
1520 | * Now read interesting descriptors again and process them | |
1521 | * in a suitable order | |
1522 | */ | |
1523 | if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { | |
78ace70c | 1524 | udf_err(sb, "Primary Volume Descriptor not found!\n"); |
c0eb31ed JK |
1525 | return 1; |
1526 | } | |
1527 | if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) | |
1528 | return 1; | |
165923fa | 1529 | |
c0eb31ed JK |
1530 | if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, |
1531 | vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) | |
1532 | return 1; | |
165923fa | 1533 | |
c0eb31ed JK |
1534 | if (vds[VDS_POS_PARTITION_DESC].block) { |
1535 | /* | |
1536 | * We rescan the whole descriptor sequence to find | |
1537 | * partition descriptor blocks and process them. | |
1538 | */ | |
1539 | for (block = vds[VDS_POS_PARTITION_DESC].block; | |
1540 | block < vds[VDS_POS_TERMINATING_DESC].block; | |
1541 | block++) | |
1542 | if (udf_load_partdesc(sb, block)) | |
165923fa | 1543 | return 1; |
1da177e4 LT |
1544 | } |
1545 | ||
1546 | return 0; | |
1547 | } | |
1548 | ||
40346005 JK |
1549 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, |
1550 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1551 | { |
40346005 JK |
1552 | struct anchorVolDescPtr *anchor; |
1553 | long main_s, main_e, reserve_s, reserve_e; | |
1da177e4 | 1554 | |
40346005 JK |
1555 | anchor = (struct anchorVolDescPtr *)bh->b_data; |
1556 | ||
1557 | /* Locate the main sequence */ | |
1558 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1559 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1560 | main_e = main_e >> sb->s_blocksize_bits; | |
1561 | main_e += main_s; | |
1562 | ||
1563 | /* Locate the reserve sequence */ | |
1564 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); | |
1565 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); | |
1566 | reserve_e = reserve_e >> sb->s_blocksize_bits; | |
1567 | reserve_e += reserve_s; | |
1568 | ||
1569 | /* Process the main & reserve sequences */ | |
1570 | /* responsible for finding the PartitionDesc(s) */ | |
1571 | if (!udf_process_sequence(sb, main_s, main_e, fileset)) | |
1572 | return 1; | |
1573 | return !udf_process_sequence(sb, reserve_s, reserve_e, fileset); | |
1da177e4 LT |
1574 | } |
1575 | ||
40346005 JK |
1576 | /* |
1577 | * Check whether there is an anchor block in the given block and | |
1578 | * load Volume Descriptor Sequence if so. | |
1579 | */ | |
1580 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, | |
1581 | struct kernel_lb_addr *fileset) | |
1197e4df | 1582 | { |
40346005 JK |
1583 | struct buffer_head *bh; |
1584 | uint16_t ident; | |
1585 | int ret; | |
1197e4df | 1586 | |
40346005 JK |
1587 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
1588 | udf_fixed_to_variable(block) >= | |
1589 | sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) | |
1197e4df | 1590 | return 0; |
40346005 JK |
1591 | |
1592 | bh = udf_read_tagged(sb, block, block, &ident); | |
1593 | if (!bh) | |
1197e4df | 1594 | return 0; |
40346005 JK |
1595 | if (ident != TAG_IDENT_AVDP) { |
1596 | brelse(bh); | |
1197e4df CL |
1597 | return 0; |
1598 | } | |
40346005 JK |
1599 | ret = udf_load_sequence(sb, bh, fileset); |
1600 | brelse(bh); | |
1601 | return ret; | |
1197e4df CL |
1602 | } |
1603 | ||
40346005 JK |
1604 | /* Search for an anchor volume descriptor pointer */ |
1605 | static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock, | |
1606 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1607 | { |
40346005 | 1608 | sector_t last[6]; |
38b74a53 | 1609 | int i; |
40346005 JK |
1610 | struct udf_sb_info *sbi = UDF_SB(sb); |
1611 | int last_count = 0; | |
1da177e4 | 1612 | |
40346005 JK |
1613 | /* First try user provided anchor */ |
1614 | if (sbi->s_anchor) { | |
1615 | if (udf_check_anchor_block(sb, sbi->s_anchor, fileset)) | |
1616 | return lastblock; | |
1617 | } | |
1618 | /* | |
1619 | * according to spec, anchor is in either: | |
1620 | * block 256 | |
1621 | * lastblock-256 | |
1622 | * lastblock | |
1623 | * however, if the disc isn't closed, it could be 512. | |
1624 | */ | |
1625 | if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset)) | |
1626 | return lastblock; | |
1627 | /* | |
1628 | * The trouble is which block is the last one. Drives often misreport | |
1629 | * this so we try various possibilities. | |
1630 | */ | |
1631 | last[last_count++] = lastblock; | |
1632 | if (lastblock >= 1) | |
1633 | last[last_count++] = lastblock - 1; | |
1634 | last[last_count++] = lastblock + 1; | |
1635 | if (lastblock >= 2) | |
1636 | last[last_count++] = lastblock - 2; | |
1637 | if (lastblock >= 150) | |
1638 | last[last_count++] = lastblock - 150; | |
1639 | if (lastblock >= 152) | |
1640 | last[last_count++] = lastblock - 152; | |
1da177e4 | 1641 | |
40346005 JK |
1642 | for (i = 0; i < last_count; i++) { |
1643 | if (last[i] >= sb->s_bdev->bd_inode->i_size >> | |
1644 | sb->s_blocksize_bits) | |
28f7c4d4 | 1645 | continue; |
40346005 JK |
1646 | if (udf_check_anchor_block(sb, last[i], fileset)) |
1647 | return last[i]; | |
1648 | if (last[i] < 256) | |
28f7c4d4 | 1649 | continue; |
40346005 JK |
1650 | if (udf_check_anchor_block(sb, last[i] - 256, fileset)) |
1651 | return last[i]; | |
1652 | } | |
28f7c4d4 | 1653 | |
40346005 JK |
1654 | /* Finally try block 512 in case media is open */ |
1655 | if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset)) | |
1656 | return last[0]; | |
1657 | return 0; | |
1658 | } | |
28f7c4d4 | 1659 | |
40346005 JK |
1660 | /* |
1661 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from | |
1662 | * area specified by it. The function expects sbi->s_lastblock to be the last | |
1663 | * block on the media. | |
1664 | * | |
1665 | * Return 1 if ok, 0 if not found. | |
1666 | * | |
1667 | */ | |
1668 | static int udf_find_anchor(struct super_block *sb, | |
1669 | struct kernel_lb_addr *fileset) | |
1670 | { | |
1671 | sector_t lastblock; | |
1672 | struct udf_sb_info *sbi = UDF_SB(sb); | |
28f7c4d4 | 1673 | |
40346005 JK |
1674 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); |
1675 | if (lastblock) | |
1676 | goto out; | |
1da177e4 | 1677 | |
40346005 JK |
1678 | /* No anchor found? Try VARCONV conversion of block numbers */ |
1679 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
1680 | /* Firstly, we try to not convert number of the last block */ | |
1681 | lastblock = udf_scan_anchors(sb, | |
1682 | udf_variable_to_fixed(sbi->s_last_block), | |
1683 | fileset); | |
1684 | if (lastblock) | |
1685 | goto out; | |
1da177e4 | 1686 | |
40346005 JK |
1687 | /* Secondly, we try with converted number of the last block */ |
1688 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); | |
1689 | if (!lastblock) { | |
1690 | /* VARCONV didn't help. Clear it. */ | |
1691 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); | |
1692 | return 0; | |
1da177e4 | 1693 | } |
40346005 JK |
1694 | out: |
1695 | sbi->s_last_block = lastblock; | |
1696 | return 1; | |
1697 | } | |
1da177e4 | 1698 | |
40346005 JK |
1699 | /* |
1700 | * Check Volume Structure Descriptor, find Anchor block and load Volume | |
1701 | * Descriptor Sequence | |
1702 | */ | |
1703 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, | |
1704 | int silent, struct kernel_lb_addr *fileset) | |
1705 | { | |
1706 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1707 | loff_t nsr_off; | |
1708 | ||
1709 | if (!sb_set_blocksize(sb, uopt->blocksize)) { | |
1710 | if (!silent) | |
78ace70c | 1711 | udf_warn(sb, "Bad block size\n"); |
40346005 JK |
1712 | return 0; |
1713 | } | |
1714 | sbi->s_last_block = uopt->lastblock; | |
1715 | if (!uopt->novrs) { | |
1716 | /* Check that it is NSR02 compliant */ | |
1717 | nsr_off = udf_check_vsd(sb); | |
1718 | if (!nsr_off) { | |
1719 | if (!silent) | |
78ace70c | 1720 | udf_warn(sb, "No VRS found\n"); |
40346005 JK |
1721 | return 0; |
1722 | } | |
1723 | if (nsr_off == -1) | |
a983f368 | 1724 | udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n"); |
40346005 JK |
1725 | if (!sbi->s_last_block) |
1726 | sbi->s_last_block = udf_get_last_block(sb); | |
1727 | } else { | |
1728 | udf_debug("Validity check skipped because of novrs option\n"); | |
28f7c4d4 | 1729 | } |
1da177e4 | 1730 | |
40346005 JK |
1731 | /* Look for anchor block and load Volume Descriptor Sequence */ |
1732 | sbi->s_anchor = uopt->anchor; | |
1733 | if (!udf_find_anchor(sb, fileset)) { | |
1734 | if (!silent) | |
78ace70c | 1735 | udf_warn(sb, "No anchor found\n"); |
40346005 JK |
1736 | return 0; |
1737 | } | |
1738 | return 1; | |
1da177e4 LT |
1739 | } |
1740 | ||
1741 | static void udf_open_lvid(struct super_block *sb) | |
1742 | { | |
6c79e987 MS |
1743 | struct udf_sb_info *sbi = UDF_SB(sb); |
1744 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
1745 | struct logicalVolIntegrityDesc *lvid; |
1746 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
146bca72 | 1747 | |
165923fa MS |
1748 | if (!bh) |
1749 | return; | |
949f4a7c JK |
1750 | |
1751 | mutex_lock(&sbi->s_alloc_mutex); | |
165923fa MS |
1752 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
1753 | lvidiu = udf_sb_lvidiu(sbi); | |
1754 | ||
1755 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1756 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1757 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, | |
1758 | CURRENT_TIME); | |
146bca72 | 1759 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); |
165923fa MS |
1760 | |
1761 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1762 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 1763 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
1764 | |
1765 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1766 | mark_buffer_dirty(bh); | |
146bca72 | 1767 | sbi->s_lvid_dirty = 0; |
949f4a7c | 1768 | mutex_unlock(&sbi->s_alloc_mutex); |
1da177e4 LT |
1769 | } |
1770 | ||
1771 | static void udf_close_lvid(struct super_block *sb) | |
1772 | { | |
6c79e987 MS |
1773 | struct udf_sb_info *sbi = UDF_SB(sb); |
1774 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1775 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 1776 | struct logicalVolIntegrityDescImpUse *lvidiu; |
28de7948 | 1777 | |
6c79e987 MS |
1778 | if (!bh) |
1779 | return; | |
1780 | ||
949f4a7c | 1781 | mutex_lock(&sbi->s_alloc_mutex); |
6c79e987 | 1782 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
165923fa MS |
1783 | lvidiu = udf_sb_lvidiu(sbi); |
1784 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1785 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1786 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); | |
1787 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) | |
1788 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
1789 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
1790 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
1791 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
1792 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
1793 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
1794 | ||
1795 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1796 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 1797 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
1798 | |
1799 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
853a0c25 JK |
1800 | /* |
1801 | * We set buffer uptodate unconditionally here to avoid spurious | |
1802 | * warnings from mark_buffer_dirty() when previous EIO has marked | |
1803 | * the buffer as !uptodate | |
1804 | */ | |
1805 | set_buffer_uptodate(bh); | |
165923fa | 1806 | mark_buffer_dirty(bh); |
146bca72 | 1807 | sbi->s_lvid_dirty = 0; |
949f4a7c | 1808 | mutex_unlock(&sbi->s_alloc_mutex); |
1da177e4 LT |
1809 | } |
1810 | ||
d664b6af JK |
1811 | u64 lvid_get_unique_id(struct super_block *sb) |
1812 | { | |
1813 | struct buffer_head *bh; | |
1814 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1815 | struct logicalVolIntegrityDesc *lvid; | |
1816 | struct logicalVolHeaderDesc *lvhd; | |
1817 | u64 uniqueID; | |
1818 | u64 ret; | |
1819 | ||
1820 | bh = sbi->s_lvid_bh; | |
1821 | if (!bh) | |
1822 | return 0; | |
1823 | ||
1824 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1825 | lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; | |
1826 | ||
1827 | mutex_lock(&sbi->s_alloc_mutex); | |
1828 | ret = uniqueID = le64_to_cpu(lvhd->uniqueID); | |
1829 | if (!(++uniqueID & 0xFFFFFFFF)) | |
1830 | uniqueID += 16; | |
1831 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
1832 | mutex_unlock(&sbi->s_alloc_mutex); | |
1833 | mark_buffer_dirty(bh); | |
1834 | ||
1835 | return ret; | |
1da177e4 LT |
1836 | } |
1837 | ||
66e1da3f MS |
1838 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
1839 | { | |
1840 | int i; | |
1841 | int nr_groups = bitmap->s_nr_groups; | |
4b11111a MS |
1842 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * |
1843 | nr_groups); | |
66e1da3f MS |
1844 | |
1845 | for (i = 0; i < nr_groups; i++) | |
1846 | if (bitmap->s_block_bitmap[i]) | |
1847 | brelse(bitmap->s_block_bitmap[i]); | |
1848 | ||
1849 | if (size <= PAGE_SIZE) | |
1850 | kfree(bitmap); | |
1851 | else | |
1852 | vfree(bitmap); | |
1853 | } | |
1854 | ||
2e0838fd JK |
1855 | static void udf_free_partition(struct udf_part_map *map) |
1856 | { | |
1857 | int i; | |
bfb257a5 | 1858 | struct udf_meta_data *mdata; |
2e0838fd JK |
1859 | |
1860 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
1861 | iput(map->s_uspace.s_table); | |
1862 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
1863 | iput(map->s_fspace.s_table); | |
1864 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
1865 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
1866 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) | |
1867 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); | |
1868 | if (map->s_partition_type == UDF_SPARABLE_MAP15) | |
1869 | for (i = 0; i < 4; i++) | |
1870 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
bfb257a5 JK |
1871 | else if (map->s_partition_type == UDF_METADATA_MAP25) { |
1872 | mdata = &map->s_type_specific.s_metadata; | |
1873 | iput(mdata->s_metadata_fe); | |
1874 | mdata->s_metadata_fe = NULL; | |
1875 | ||
1876 | iput(mdata->s_mirror_fe); | |
1877 | mdata->s_mirror_fe = NULL; | |
1878 | ||
1879 | iput(mdata->s_bitmap_fe); | |
1880 | mdata->s_bitmap_fe = NULL; | |
1881 | } | |
2e0838fd JK |
1882 | } |
1883 | ||
1da177e4 LT |
1884 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
1885 | { | |
1886 | int i; | |
40346005 | 1887 | int ret; |
cb00ea35 | 1888 | struct inode *inode = NULL; |
1da177e4 | 1889 | struct udf_options uopt; |
5ca4e4be | 1890 | struct kernel_lb_addr rootdir, fileset; |
1da177e4 LT |
1891 | struct udf_sb_info *sbi; |
1892 | ||
1893 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
1894 | uopt.uid = -1; | |
1895 | uopt.gid = -1; | |
1896 | uopt.umask = 0; | |
87bc730c MS |
1897 | uopt.fmode = UDF_INVALID_MODE; |
1898 | uopt.dmode = UDF_INVALID_MODE; | |
1da177e4 | 1899 | |
6c79e987 | 1900 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
9db9f9e3 | 1901 | if (!sbi) |
1da177e4 | 1902 | return -ENOMEM; |
28de7948 | 1903 | |
1da177e4 | 1904 | sb->s_fs_info = sbi; |
1da177e4 | 1905 | |
1e7933de | 1906 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 1907 | |
6da80894 | 1908 | if (!udf_parse_options((char *)options, &uopt, false)) |
1da177e4 LT |
1909 | goto error_out; |
1910 | ||
1911 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 1912 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
8076c363 | 1913 | udf_err(sb, "utf8 cannot be combined with iocharset\n"); |
1da177e4 LT |
1914 | goto error_out; |
1915 | } | |
1916 | #ifdef CONFIG_UDF_NLS | |
cb00ea35 | 1917 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
1918 | uopt.nls_map = load_nls_default(); |
1919 | if (!uopt.nls_map) | |
1920 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
1921 | else | |
1922 | udf_debug("Using default NLS map\n"); | |
1923 | } | |
1924 | #endif | |
1925 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
1926 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
1927 | ||
1928 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
1929 | fileset.partitionReferenceNum = 0xFFFF; | |
1930 | ||
6c79e987 MS |
1931 | sbi->s_flags = uopt.flags; |
1932 | sbi->s_uid = uopt.uid; | |
1933 | sbi->s_gid = uopt.gid; | |
1934 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
1935 | sbi->s_fmode = uopt.fmode; |
1936 | sbi->s_dmode = uopt.dmode; | |
6c79e987 | 1937 | sbi->s_nls_map = uopt.nls_map; |
c03cad24 | 1938 | rwlock_init(&sbi->s_cred_lock); |
1da177e4 | 1939 | |
cb00ea35 | 1940 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 1941 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 1942 | else |
6c79e987 | 1943 | sbi->s_session = uopt.session; |
1da177e4 | 1944 | |
6c79e987 | 1945 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 1946 | |
40346005 JK |
1947 | /* Fill in the rest of the superblock */ |
1948 | sb->s_op = &udf_sb_ops; | |
1949 | sb->s_export_op = &udf_export_ops; | |
123e9caf | 1950 | |
40346005 JK |
1951 | sb->s_dirt = 0; |
1952 | sb->s_magic = UDF_SUPER_MAGIC; | |
1953 | sb->s_time_gran = 1000; | |
1954 | ||
1197e4df | 1955 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { |
40346005 | 1956 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 1957 | } else { |
e1defc4f | 1958 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); |
40346005 JK |
1959 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1960 | if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { | |
1197e4df | 1961 | if (!silent) |
78ace70c JP |
1962 | pr_notice("Rescanning with blocksize %d\n", |
1963 | UDF_DEFAULT_BLOCKSIZE); | |
1197e4df | 1964 | uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; |
40346005 | 1965 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 1966 | } |
1da177e4 | 1967 | } |
40346005 | 1968 | if (!ret) { |
78ace70c | 1969 | udf_warn(sb, "No partition found (1)\n"); |
1da177e4 LT |
1970 | goto error_out; |
1971 | } | |
1972 | ||
6c79e987 | 1973 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
1da177e4 | 1974 | |
6c79e987 | 1975 | if (sbi->s_lvid_bh) { |
4b11111a MS |
1976 | struct logicalVolIntegrityDescImpUse *lvidiu = |
1977 | udf_sb_lvidiu(sbi); | |
6c79e987 MS |
1978 | uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); |
1979 | uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
4b11111a MS |
1980 | /* uint16_t maxUDFWriteRev = |
1981 | le16_to_cpu(lvidiu->maxUDFWriteRev); */ | |
1da177e4 | 1982 | |
cb00ea35 | 1983 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
78ace70c JP |
1984 | udf_err(sb, "minUDFReadRev=%x (max is %x)\n", |
1985 | le16_to_cpu(lvidiu->minUDFReadRev), | |
1986 | UDF_MAX_READ_VERSION); | |
1da177e4 | 1987 | goto error_out; |
4b11111a | 1988 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) |
1da177e4 | 1989 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 1990 | |
6c79e987 | 1991 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
1992 | |
1993 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
1994 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
1995 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
1996 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
1997 | } | |
1998 | ||
6c79e987 | 1999 | if (!sbi->s_partitions) { |
78ace70c | 2000 | udf_warn(sb, "No partition found (2)\n"); |
1da177e4 LT |
2001 | goto error_out; |
2002 | } | |
2003 | ||
4b11111a MS |
2004 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
2005 | UDF_PART_FLAG_READ_ONLY) { | |
78ace70c | 2006 | pr_notice("Partition marked readonly; forcing readonly mount\n"); |
39b3f6d6 | 2007 | sb->s_flags |= MS_RDONLY; |
c1a26e7d | 2008 | } |
39b3f6d6 | 2009 | |
cb00ea35 | 2010 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
78ace70c | 2011 | udf_warn(sb, "No fileset found\n"); |
1da177e4 LT |
2012 | goto error_out; |
2013 | } | |
2014 | ||
cb00ea35 | 2015 | if (!silent) { |
5ca4e4be | 2016 | struct timestamp ts; |
56774805 | 2017 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); |
78ace70c JP |
2018 | udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
2019 | sbi->s_volume_ident, | |
2020 | le16_to_cpu(ts.year), ts.month, ts.day, | |
56774805 | 2021 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); |
1da177e4 LT |
2022 | } |
2023 | if (!(sb->s_flags & MS_RDONLY)) | |
2024 | udf_open_lvid(sb); | |
2025 | ||
2026 | /* Assign the root inode */ | |
2027 | /* assign inodes by physical block number */ | |
2028 | /* perhaps it's not extensible enough, but for now ... */ | |
97e961fd | 2029 | inode = udf_iget(sb, &rootdir); |
cb00ea35 | 2030 | if (!inode) { |
78ace70c | 2031 | udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n", |
cb00ea35 | 2032 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
1da177e4 LT |
2033 | goto error_out; |
2034 | } | |
2035 | ||
2036 | /* Allocate a dentry for the root inode */ | |
48fde701 | 2037 | sb->s_root = d_make_root(inode); |
cb00ea35 | 2038 | if (!sb->s_root) { |
78ace70c | 2039 | udf_err(sb, "Couldn't allocate root dentry\n"); |
1da177e4 LT |
2040 | goto error_out; |
2041 | } | |
31170b6a | 2042 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
8de52778 | 2043 | sb->s_max_links = UDF_MAX_LINKS; |
1da177e4 LT |
2044 | return 0; |
2045 | ||
28de7948 | 2046 | error_out: |
6c79e987 MS |
2047 | if (sbi->s_vat_inode) |
2048 | iput(sbi->s_vat_inode); | |
2e0838fd JK |
2049 | if (sbi->s_partitions) |
2050 | for (i = 0; i < sbi->s_partitions; i++) | |
2051 | udf_free_partition(&sbi->s_partmaps[i]); | |
1da177e4 LT |
2052 | #ifdef CONFIG_UDF_NLS |
2053 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2054 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2055 | #endif |
2056 | if (!(sb->s_flags & MS_RDONLY)) | |
2057 | udf_close_lvid(sb); | |
6c79e987 MS |
2058 | brelse(sbi->s_lvid_bh); |
2059 | ||
2060 | kfree(sbi->s_partmaps); | |
1da177e4 LT |
2061 | kfree(sbi); |
2062 | sb->s_fs_info = NULL; | |
28de7948 | 2063 | |
1da177e4 LT |
2064 | return -EINVAL; |
2065 | } | |
2066 | ||
8076c363 JP |
2067 | void _udf_err(struct super_block *sb, const char *function, |
2068 | const char *fmt, ...) | |
1da177e4 | 2069 | { |
c2bff36c | 2070 | struct va_format vaf; |
1da177e4 LT |
2071 | va_list args; |
2072 | ||
c2bff36c JP |
2073 | /* mark sb error */ |
2074 | if (!(sb->s_flags & MS_RDONLY)) | |
1da177e4 | 2075 | sb->s_dirt = 1; |
c2bff36c | 2076 | |
1da177e4 | 2077 | va_start(args, fmt); |
c2bff36c JP |
2078 | |
2079 | vaf.fmt = fmt; | |
2080 | vaf.va = &args; | |
2081 | ||
2082 | pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2083 | ||
1da177e4 | 2084 | va_end(args); |
1da177e4 LT |
2085 | } |
2086 | ||
a40ecd7b JP |
2087 | void _udf_warn(struct super_block *sb, const char *function, |
2088 | const char *fmt, ...) | |
1da177e4 | 2089 | { |
c2bff36c | 2090 | struct va_format vaf; |
1da177e4 LT |
2091 | va_list args; |
2092 | ||
cb00ea35 | 2093 | va_start(args, fmt); |
c2bff36c JP |
2094 | |
2095 | vaf.fmt = fmt; | |
2096 | vaf.va = &args; | |
2097 | ||
2098 | pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); | |
2099 | ||
1da177e4 | 2100 | va_end(args); |
1da177e4 LT |
2101 | } |
2102 | ||
cb00ea35 | 2103 | static void udf_put_super(struct super_block *sb) |
1da177e4 LT |
2104 | { |
2105 | int i; | |
6c79e987 | 2106 | struct udf_sb_info *sbi; |
1da177e4 | 2107 | |
6c79e987 | 2108 | sbi = UDF_SB(sb); |
6cfd0148 | 2109 | |
6c79e987 MS |
2110 | if (sbi->s_vat_inode) |
2111 | iput(sbi->s_vat_inode); | |
2e0838fd JK |
2112 | if (sbi->s_partitions) |
2113 | for (i = 0; i < sbi->s_partitions; i++) | |
2114 | udf_free_partition(&sbi->s_partmaps[i]); | |
1da177e4 LT |
2115 | #ifdef CONFIG_UDF_NLS |
2116 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2117 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2118 | #endif |
2119 | if (!(sb->s_flags & MS_RDONLY)) | |
2120 | udf_close_lvid(sb); | |
6c79e987 MS |
2121 | brelse(sbi->s_lvid_bh); |
2122 | kfree(sbi->s_partmaps); | |
1da177e4 LT |
2123 | kfree(sb->s_fs_info); |
2124 | sb->s_fs_info = NULL; | |
2125 | } | |
2126 | ||
146bca72 JK |
2127 | static int udf_sync_fs(struct super_block *sb, int wait) |
2128 | { | |
2129 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2130 | ||
2131 | mutex_lock(&sbi->s_alloc_mutex); | |
2132 | if (sbi->s_lvid_dirty) { | |
2133 | /* | |
2134 | * Blockdevice will be synced later so we don't have to submit | |
2135 | * the buffer for IO | |
2136 | */ | |
2137 | mark_buffer_dirty(sbi->s_lvid_bh); | |
2138 | sb->s_dirt = 0; | |
2139 | sbi->s_lvid_dirty = 0; | |
2140 | } | |
2141 | mutex_unlock(&sbi->s_alloc_mutex); | |
2142 | ||
2143 | return 0; | |
2144 | } | |
2145 | ||
cb00ea35 | 2146 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2147 | { |
726c3342 | 2148 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
2149 | struct udf_sb_info *sbi = UDF_SB(sb); |
2150 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
557f5a14 | 2151 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
6c79e987 MS |
2152 | |
2153 | if (sbi->s_lvid_bh != NULL) | |
2154 | lvidiu = udf_sb_lvidiu(sbi); | |
2155 | else | |
2156 | lvidiu = NULL; | |
726c3342 | 2157 | |
1da177e4 LT |
2158 | buf->f_type = UDF_SUPER_MAGIC; |
2159 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 2160 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
2161 | buf->f_bfree = udf_count_free(sb); |
2162 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
2163 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
2164 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
2165 | + buf->f_bfree; | |
1da177e4 | 2166 | buf->f_ffree = buf->f_bfree; |
cb00ea35 | 2167 | buf->f_namelen = UDF_NAME_LEN - 2; |
557f5a14 CL |
2168 | buf->f_fsid.val[0] = (u32)id; |
2169 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
2170 | |
2171 | return 0; | |
2172 | } | |
2173 | ||
4b11111a MS |
2174 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
2175 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
2176 | { |
2177 | struct buffer_head *bh = NULL; | |
2178 | unsigned int accum = 0; | |
2179 | int index; | |
2180 | int block = 0, newblock; | |
5ca4e4be | 2181 | struct kernel_lb_addr loc; |
1da177e4 | 2182 | uint32_t bytes; |
1da177e4 LT |
2183 | uint8_t *ptr; |
2184 | uint16_t ident; | |
2185 | struct spaceBitmapDesc *bm; | |
2186 | ||
1da177e4 | 2187 | loc.logicalBlockNum = bitmap->s_extPosition; |
6c79e987 | 2188 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
97e961fd | 2189 | bh = udf_read_ptagged(sb, &loc, 0, &ident); |
1da177e4 | 2190 | |
cb00ea35 | 2191 | if (!bh) { |
78ace70c | 2192 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 | 2193 | goto out; |
cb00ea35 | 2194 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 2195 | brelse(bh); |
78ace70c | 2196 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 LT |
2197 | goto out; |
2198 | } | |
2199 | ||
2200 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2201 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
2202 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
2203 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 2204 | |
cb00ea35 | 2205 | while (bytes > 0) { |
01b954a3 MS |
2206 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
2207 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2208 | cur_bytes * 8); | |
2209 | bytes -= cur_bytes; | |
cb00ea35 | 2210 | if (bytes) { |
3bf25cb4 | 2211 | brelse(bh); |
97e961fd | 2212 | newblock = udf_get_lb_pblock(sb, &loc, ++block); |
1da177e4 | 2213 | bh = udf_tread(sb, newblock); |
cb00ea35 | 2214 | if (!bh) { |
1da177e4 LT |
2215 | udf_debug("read failed\n"); |
2216 | goto out; | |
2217 | } | |
2218 | index = 0; | |
28de7948 | 2219 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2220 | } |
2221 | } | |
3bf25cb4 | 2222 | brelse(bh); |
28de7948 | 2223 | out: |
1da177e4 LT |
2224 | return accum; |
2225 | } | |
2226 | ||
4b11111a MS |
2227 | static unsigned int udf_count_free_table(struct super_block *sb, |
2228 | struct inode *table) | |
1da177e4 LT |
2229 | { |
2230 | unsigned int accum = 0; | |
ff116fc8 | 2231 | uint32_t elen; |
5ca4e4be | 2232 | struct kernel_lb_addr eloc; |
1da177e4 | 2233 | int8_t etype; |
ff116fc8 | 2234 | struct extent_position epos; |
1da177e4 | 2235 | |
d1668fe3 | 2236 | mutex_lock(&UDF_SB(sb)->s_alloc_mutex); |
c0b34438 | 2237 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2238 | epos.offset = sizeof(struct unallocSpaceEntry); |
2239 | epos.bh = NULL; | |
1da177e4 | 2240 | |
3a71fc5d | 2241 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2242 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2243 | |
3bf25cb4 | 2244 | brelse(epos.bh); |
d1668fe3 | 2245 | mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); |
1da177e4 LT |
2246 | |
2247 | return accum; | |
2248 | } | |
cb00ea35 CG |
2249 | |
2250 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2251 | { |
2252 | unsigned int accum = 0; | |
6c79e987 MS |
2253 | struct udf_sb_info *sbi; |
2254 | struct udf_part_map *map; | |
1da177e4 | 2255 | |
6c79e987 MS |
2256 | sbi = UDF_SB(sb); |
2257 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2258 | struct logicalVolIntegrityDesc *lvid = |
2259 | (struct logicalVolIntegrityDesc *) | |
2260 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2261 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2262 | accum = le32_to_cpu( |
2263 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2264 | if (accum == 0xFFFFFFFF) |
2265 | accum = 0; | |
2266 | } | |
2267 | } | |
2268 | ||
2269 | if (accum) | |
2270 | return accum; | |
2271 | ||
6c79e987 MS |
2272 | map = &sbi->s_partmaps[sbi->s_partition]; |
2273 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2274 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2275 | map->s_uspace.s_bitmap); |
1da177e4 | 2276 | } |
6c79e987 | 2277 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
28de7948 | 2278 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2279 | map->s_fspace.s_bitmap); |
1da177e4 LT |
2280 | } |
2281 | if (accum) | |
2282 | return accum; | |
2283 | ||
6c79e987 | 2284 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2285 | accum += udf_count_free_table(sb, |
6c79e987 | 2286 | map->s_uspace.s_table); |
1da177e4 | 2287 | } |
6c79e987 | 2288 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
28de7948 | 2289 | accum += udf_count_free_table(sb, |
6c79e987 | 2290 | map->s_fspace.s_table); |
1da177e4 LT |
2291 | } |
2292 | ||
2293 | return accum; | |
2294 | } |