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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 | ||
1da177e4 LT |
78 | static char error_buf[1024]; |
79 | ||
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 *); |
6da80894 | 94 | static int udf_show_options(struct seq_file *, struct vfsmount *); |
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 NP |
142 | struct inode *inode = container_of(head, struct inode, i_rcu); |
143 | INIT_LIST_HEAD(&inode->i_dentry); | |
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; | |
201 | mode_t umask; | |
202 | gid_t gid; | |
203 | uid_t uid; | |
7ac9bcd5 MS |
204 | mode_t fmode; |
205 | mode_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 | ||
6da80894 MS |
255 | static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt) |
256 | { | |
257 | struct super_block *sb = mnt->mnt_sb; | |
258 | struct udf_sb_info *sbi = UDF_SB(sb); | |
259 | ||
260 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
261 | seq_puts(seq, ",nostrict"); | |
1197e4df | 262 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) |
6da80894 MS |
263 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); |
264 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
265 | seq_puts(seq, ",unhide"); | |
266 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
267 | seq_puts(seq, ",undelete"); | |
268 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
269 | seq_puts(seq, ",noadinicb"); | |
270 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
271 | seq_puts(seq, ",shortad"); | |
272 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
273 | seq_puts(seq, ",uid=forget"); | |
274 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) | |
275 | seq_puts(seq, ",uid=ignore"); | |
276 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) | |
277 | seq_puts(seq, ",gid=forget"); | |
278 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) | |
279 | seq_puts(seq, ",gid=ignore"); | |
280 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) | |
281 | seq_printf(seq, ",uid=%u", sbi->s_uid); | |
282 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) | |
283 | seq_printf(seq, ",gid=%u", sbi->s_gid); | |
284 | if (sbi->s_umask != 0) | |
285 | seq_printf(seq, ",umask=%o", sbi->s_umask); | |
87bc730c | 286 | if (sbi->s_fmode != UDF_INVALID_MODE) |
7ac9bcd5 | 287 | seq_printf(seq, ",mode=%o", sbi->s_fmode); |
87bc730c | 288 | if (sbi->s_dmode != UDF_INVALID_MODE) |
7ac9bcd5 | 289 | seq_printf(seq, ",dmode=%o", sbi->s_dmode); |
6da80894 MS |
290 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) |
291 | seq_printf(seq, ",session=%u", sbi->s_session); | |
292 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) | |
293 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
40346005 JK |
294 | if (sbi->s_anchor != 0) |
295 | seq_printf(seq, ",anchor=%u", sbi->s_anchor); | |
6da80894 MS |
296 | /* |
297 | * volume, partition, fileset and rootdir seem to be ignored | |
298 | * currently | |
299 | */ | |
300 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) | |
301 | seq_puts(seq, ",utf8"); | |
302 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
303 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
1da177e4 LT |
308 | /* |
309 | * udf_parse_options | |
310 | * | |
311 | * PURPOSE | |
312 | * Parse mount options. | |
313 | * | |
314 | * DESCRIPTION | |
315 | * The following mount options are supported: | |
316 | * | |
317 | * gid= Set the default group. | |
318 | * umask= Set the default umask. | |
7ac9bcd5 MS |
319 | * mode= Set the default file permissions. |
320 | * dmode= Set the default directory permissions. | |
1da177e4 LT |
321 | * uid= Set the default user. |
322 | * bs= Set the block size. | |
323 | * unhide Show otherwise hidden files. | |
324 | * undelete Show deleted files in lists. | |
325 | * adinicb Embed data in the inode (default) | |
326 | * noadinicb Don't embed data in the inode | |
327 | * shortad Use short ad's | |
328 | * longad Use long ad's (default) | |
329 | * nostrict Unset strict conformance | |
330 | * iocharset= Set the NLS character set | |
331 | * | |
332 | * The remaining are for debugging and disaster recovery: | |
333 | * | |
28de7948 | 334 | * novrs Skip volume sequence recognition |
1da177e4 LT |
335 | * |
336 | * The following expect a offset from 0. | |
337 | * | |
338 | * session= Set the CDROM session (default= last session) | |
339 | * anchor= Override standard anchor location. (default= 256) | |
340 | * volume= Override the VolumeDesc location. (unused) | |
341 | * partition= Override the PartitionDesc location. (unused) | |
342 | * lastblock= Set the last block of the filesystem/ | |
343 | * | |
344 | * The following expect a offset from the partition root. | |
345 | * | |
346 | * fileset= Override the fileset block location. (unused) | |
347 | * rootdir= Override the root directory location. (unused) | |
348 | * WARNING: overriding the rootdir to a non-directory may | |
349 | * yield highly unpredictable results. | |
350 | * | |
351 | * PRE-CONDITIONS | |
352 | * options Pointer to mount options string. | |
353 | * uopts Pointer to mount options variable. | |
354 | * | |
355 | * POST-CONDITIONS | |
356 | * <return> 1 Mount options parsed okay. | |
357 | * <return> 0 Error parsing mount options. | |
358 | * | |
359 | * HISTORY | |
360 | * July 1, 1997 - Andrew E. Mileski | |
361 | * Written, tested, and released. | |
362 | */ | |
28de7948 | 363 | |
1da177e4 LT |
364 | enum { |
365 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
366 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
367 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
368 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
369 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
7ac9bcd5 MS |
370 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, |
371 | Opt_fmode, Opt_dmode | |
1da177e4 LT |
372 | }; |
373 | ||
a447c093 | 374 | static const match_table_t tokens = { |
28de7948 CG |
375 | {Opt_novrs, "novrs"}, |
376 | {Opt_nostrict, "nostrict"}, | |
377 | {Opt_bs, "bs=%u"}, | |
378 | {Opt_unhide, "unhide"}, | |
379 | {Opt_undelete, "undelete"}, | |
380 | {Opt_noadinicb, "noadinicb"}, | |
381 | {Opt_adinicb, "adinicb"}, | |
382 | {Opt_shortad, "shortad"}, | |
383 | {Opt_longad, "longad"}, | |
384 | {Opt_uforget, "uid=forget"}, | |
385 | {Opt_uignore, "uid=ignore"}, | |
386 | {Opt_gforget, "gid=forget"}, | |
387 | {Opt_gignore, "gid=ignore"}, | |
388 | {Opt_gid, "gid=%u"}, | |
389 | {Opt_uid, "uid=%u"}, | |
390 | {Opt_umask, "umask=%o"}, | |
391 | {Opt_session, "session=%u"}, | |
392 | {Opt_lastblock, "lastblock=%u"}, | |
393 | {Opt_anchor, "anchor=%u"}, | |
394 | {Opt_volume, "volume=%u"}, | |
395 | {Opt_partition, "partition=%u"}, | |
396 | {Opt_fileset, "fileset=%u"}, | |
397 | {Opt_rootdir, "rootdir=%u"}, | |
398 | {Opt_utf8, "utf8"}, | |
399 | {Opt_iocharset, "iocharset=%s"}, | |
7ac9bcd5 MS |
400 | {Opt_fmode, "mode=%o"}, |
401 | {Opt_dmode, "dmode=%o"}, | |
28de7948 | 402 | {Opt_err, NULL} |
1da177e4 LT |
403 | }; |
404 | ||
6da80894 MS |
405 | static int udf_parse_options(char *options, struct udf_options *uopt, |
406 | bool remount) | |
1da177e4 LT |
407 | { |
408 | char *p; | |
409 | int option; | |
410 | ||
411 | uopt->novrs = 0; | |
1da177e4 LT |
412 | uopt->partition = 0xFFFF; |
413 | uopt->session = 0xFFFFFFFF; | |
414 | uopt->lastblock = 0; | |
415 | uopt->anchor = 0; | |
416 | uopt->volume = 0xFFFFFFFF; | |
417 | uopt->rootdir = 0xFFFFFFFF; | |
418 | uopt->fileset = 0xFFFFFFFF; | |
419 | uopt->nls_map = NULL; | |
420 | ||
421 | if (!options) | |
422 | return 1; | |
423 | ||
cb00ea35 | 424 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
425 | substring_t args[MAX_OPT_ARGS]; |
426 | int token; | |
427 | if (!*p) | |
428 | continue; | |
429 | ||
430 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
431 | switch (token) { |
432 | case Opt_novrs: | |
433 | uopt->novrs = 1; | |
4136801a | 434 | break; |
cb00ea35 CG |
435 | case Opt_bs: |
436 | if (match_int(&args[0], &option)) | |
437 | return 0; | |
438 | uopt->blocksize = option; | |
1197e4df | 439 | uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); |
cb00ea35 CG |
440 | break; |
441 | case Opt_unhide: | |
442 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
443 | break; | |
444 | case Opt_undelete: | |
445 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
446 | break; | |
447 | case Opt_noadinicb: | |
448 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
449 | break; | |
450 | case Opt_adinicb: | |
451 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
452 | break; | |
453 | case Opt_shortad: | |
454 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
455 | break; | |
456 | case Opt_longad: | |
457 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
458 | break; | |
459 | case Opt_gid: | |
460 | if (match_int(args, &option)) | |
461 | return 0; | |
462 | uopt->gid = option; | |
ca76d2d8 | 463 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
464 | break; |
465 | case Opt_uid: | |
466 | if (match_int(args, &option)) | |
467 | return 0; | |
468 | uopt->uid = option; | |
ca76d2d8 | 469 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
470 | break; |
471 | case Opt_umask: | |
472 | if (match_octal(args, &option)) | |
473 | return 0; | |
474 | uopt->umask = option; | |
475 | break; | |
476 | case Opt_nostrict: | |
477 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
478 | break; | |
479 | case Opt_session: | |
480 | if (match_int(args, &option)) | |
481 | return 0; | |
482 | uopt->session = option; | |
6da80894 MS |
483 | if (!remount) |
484 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
485 | break; |
486 | case Opt_lastblock: | |
487 | if (match_int(args, &option)) | |
488 | return 0; | |
489 | uopt->lastblock = option; | |
6da80894 MS |
490 | if (!remount) |
491 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
492 | break; |
493 | case Opt_anchor: | |
494 | if (match_int(args, &option)) | |
495 | return 0; | |
496 | uopt->anchor = option; | |
497 | break; | |
498 | case Opt_volume: | |
499 | if (match_int(args, &option)) | |
500 | return 0; | |
501 | uopt->volume = option; | |
502 | break; | |
503 | case Opt_partition: | |
504 | if (match_int(args, &option)) | |
505 | return 0; | |
506 | uopt->partition = option; | |
507 | break; | |
508 | case Opt_fileset: | |
509 | if (match_int(args, &option)) | |
510 | return 0; | |
511 | uopt->fileset = option; | |
512 | break; | |
513 | case Opt_rootdir: | |
514 | if (match_int(args, &option)) | |
515 | return 0; | |
516 | uopt->rootdir = option; | |
517 | break; | |
518 | case Opt_utf8: | |
519 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
520 | break; | |
1da177e4 | 521 | #ifdef CONFIG_UDF_NLS |
cb00ea35 CG |
522 | case Opt_iocharset: |
523 | uopt->nls_map = load_nls(args[0].from); | |
524 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
525 | break; | |
1da177e4 | 526 | #endif |
cb00ea35 CG |
527 | case Opt_uignore: |
528 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); | |
529 | break; | |
530 | case Opt_uforget: | |
531 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
532 | break; | |
533 | case Opt_gignore: | |
534 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); | |
535 | break; | |
536 | case Opt_gforget: | |
537 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
538 | break; | |
7ac9bcd5 MS |
539 | case Opt_fmode: |
540 | if (match_octal(args, &option)) | |
541 | return 0; | |
542 | uopt->fmode = option & 0777; | |
543 | break; | |
544 | case Opt_dmode: | |
545 | if (match_octal(args, &option)) | |
546 | return 0; | |
547 | uopt->dmode = option & 0777; | |
548 | break; | |
cb00ea35 | 549 | default: |
78ace70c | 550 | pr_err("bad mount option \"%s\" or missing value\n", p); |
1da177e4 LT |
551 | return 0; |
552 | } | |
553 | } | |
554 | return 1; | |
555 | } | |
556 | ||
cb00ea35 | 557 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
558 | { |
559 | struct udf_options uopt; | |
6c79e987 | 560 | struct udf_sb_info *sbi = UDF_SB(sb); |
c79d967d | 561 | int error = 0; |
1da177e4 | 562 | |
6c79e987 MS |
563 | uopt.flags = sbi->s_flags; |
564 | uopt.uid = sbi->s_uid; | |
565 | uopt.gid = sbi->s_gid; | |
566 | uopt.umask = sbi->s_umask; | |
7ac9bcd5 MS |
567 | uopt.fmode = sbi->s_fmode; |
568 | uopt.dmode = sbi->s_dmode; | |
1da177e4 | 569 | |
6da80894 | 570 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
571 | return -EINVAL; |
572 | ||
c03cad24 | 573 | write_lock(&sbi->s_cred_lock); |
6c79e987 MS |
574 | sbi->s_flags = uopt.flags; |
575 | sbi->s_uid = uopt.uid; | |
576 | sbi->s_gid = uopt.gid; | |
577 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
578 | sbi->s_fmode = uopt.fmode; |
579 | sbi->s_dmode = uopt.dmode; | |
c03cad24 | 580 | write_unlock(&sbi->s_cred_lock); |
1da177e4 | 581 | |
6c79e987 MS |
582 | if (sbi->s_lvid_bh) { |
583 | int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); | |
1da177e4 LT |
584 | if (write_rev > UDF_MAX_WRITE_VERSION) |
585 | *flags |= MS_RDONLY; | |
586 | } | |
587 | ||
c79d967d CH |
588 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
589 | goto out_unlock; | |
590 | ||
36350462 | 591 | if (*flags & MS_RDONLY) |
1da177e4 | 592 | udf_close_lvid(sb); |
36350462 | 593 | else |
1da177e4 LT |
594 | udf_open_lvid(sb); |
595 | ||
c79d967d | 596 | out_unlock: |
c79d967d | 597 | return error; |
1da177e4 LT |
598 | } |
599 | ||
40346005 JK |
600 | /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ |
601 | /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
602 | static loff_t udf_check_vsd(struct super_block *sb) | |
1da177e4 LT |
603 | { |
604 | struct volStructDesc *vsd = NULL; | |
f4bcbbd9 | 605 | loff_t sector = 32768; |
1da177e4 LT |
606 | int sectorsize; |
607 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
608 | int nsr02 = 0; |
609 | int nsr03 = 0; | |
6c79e987 | 610 | struct udf_sb_info *sbi; |
1da177e4 | 611 | |
6c79e987 | 612 | sbi = UDF_SB(sb); |
1da177e4 LT |
613 | if (sb->s_blocksize < sizeof(struct volStructDesc)) |
614 | sectorsize = sizeof(struct volStructDesc); | |
615 | else | |
616 | sectorsize = sb->s_blocksize; | |
617 | ||
6c79e987 | 618 | sector += (sbi->s_session << sb->s_blocksize_bits); |
1da177e4 LT |
619 | |
620 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
706047a7 SM |
621 | (unsigned int)(sector >> sb->s_blocksize_bits), |
622 | sb->s_blocksize); | |
1da177e4 | 623 | /* Process the sequence (if applicable) */ |
cb00ea35 | 624 | for (; !nsr02 && !nsr03; sector += sectorsize) { |
1da177e4 LT |
625 | /* Read a block */ |
626 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
627 | if (!bh) | |
628 | break; | |
629 | ||
630 | /* Look for ISO descriptors */ | |
631 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 632 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 633 | |
cb00ea35 | 634 | if (vsd->stdIdent[0] == 0) { |
3bf25cb4 | 635 | brelse(bh); |
1da177e4 | 636 | break; |
3a71fc5d MS |
637 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
638 | VSD_STD_ID_LEN)) { | |
cb00ea35 CG |
639 | switch (vsd->structType) { |
640 | case 0: | |
641 | udf_debug("ISO9660 Boot Record found\n"); | |
642 | break; | |
643 | case 1: | |
3a71fc5d MS |
644 | udf_debug("ISO9660 Primary Volume Descriptor " |
645 | "found\n"); | |
cb00ea35 CG |
646 | break; |
647 | case 2: | |
3a71fc5d MS |
648 | udf_debug("ISO9660 Supplementary Volume " |
649 | "Descriptor found\n"); | |
cb00ea35 CG |
650 | break; |
651 | case 3: | |
3a71fc5d MS |
652 | udf_debug("ISO9660 Volume Partition Descriptor " |
653 | "found\n"); | |
cb00ea35 CG |
654 | break; |
655 | case 255: | |
3a71fc5d MS |
656 | udf_debug("ISO9660 Volume Descriptor Set " |
657 | "Terminator found\n"); | |
cb00ea35 CG |
658 | break; |
659 | default: | |
660 | udf_debug("ISO9660 VRS (%u) found\n", | |
661 | vsd->structType); | |
662 | break; | |
1da177e4 | 663 | } |
3a71fc5d MS |
664 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
665 | VSD_STD_ID_LEN)) | |
666 | ; /* nothing */ | |
667 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
668 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 669 | brelse(bh); |
1da177e4 | 670 | break; |
3a71fc5d MS |
671 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
672 | VSD_STD_ID_LEN)) | |
1da177e4 | 673 | nsr02 = sector; |
3a71fc5d MS |
674 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
675 | VSD_STD_ID_LEN)) | |
1da177e4 | 676 | nsr03 = sector; |
3bf25cb4 | 677 | brelse(bh); |
1da177e4 LT |
678 | } |
679 | ||
680 | if (nsr03) | |
681 | return nsr03; | |
682 | else if (nsr02) | |
683 | return nsr02; | |
6c79e987 | 684 | else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) |
1da177e4 LT |
685 | return -1; |
686 | else | |
687 | return 0; | |
688 | } | |
689 | ||
3a71fc5d | 690 | static int udf_find_fileset(struct super_block *sb, |
5ca4e4be PE |
691 | struct kernel_lb_addr *fileset, |
692 | struct kernel_lb_addr *root) | |
1da177e4 LT |
693 | { |
694 | struct buffer_head *bh = NULL; | |
695 | long lastblock; | |
696 | uint16_t ident; | |
6c79e987 | 697 | struct udf_sb_info *sbi; |
1da177e4 LT |
698 | |
699 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 700 | fileset->partitionReferenceNum != 0xFFFF) { |
97e961fd | 701 | bh = udf_read_ptagged(sb, fileset, 0, &ident); |
1da177e4 | 702 | |
28de7948 | 703 | if (!bh) { |
1da177e4 | 704 | return 1; |
28de7948 | 705 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 706 | brelse(bh); |
1da177e4 LT |
707 | return 1; |
708 | } | |
cb00ea35 | 709 | |
1da177e4 LT |
710 | } |
711 | ||
6c79e987 | 712 | sbi = UDF_SB(sb); |
3a71fc5d MS |
713 | if (!bh) { |
714 | /* Search backwards through the partitions */ | |
5ca4e4be | 715 | struct kernel_lb_addr newfileset; |
1da177e4 | 716 | |
28de7948 | 717 | /* --> cvg: FIXME - is it reasonable? */ |
1da177e4 | 718 | return 1; |
cb00ea35 | 719 | |
6c79e987 | 720 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
cb00ea35 CG |
721 | (newfileset.partitionReferenceNum != 0xFFFF && |
722 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
723 | fileset->partitionReferenceNum == 0xFFFF); | |
724 | newfileset.partitionReferenceNum--) { | |
6c79e987 MS |
725 | lastblock = sbi->s_partmaps |
726 | [newfileset.partitionReferenceNum] | |
727 | .s_partition_len; | |
1da177e4 LT |
728 | newfileset.logicalBlockNum = 0; |
729 | ||
cb00ea35 | 730 | do { |
97e961fd | 731 | bh = udf_read_ptagged(sb, &newfileset, 0, |
3a71fc5d | 732 | &ident); |
cb00ea35 CG |
733 | if (!bh) { |
734 | newfileset.logicalBlockNum++; | |
1da177e4 LT |
735 | continue; |
736 | } | |
737 | ||
cb00ea35 CG |
738 | switch (ident) { |
739 | case TAG_IDENT_SBD: | |
28de7948 CG |
740 | { |
741 | struct spaceBitmapDesc *sp; | |
4b11111a MS |
742 | sp = (struct spaceBitmapDesc *) |
743 | bh->b_data; | |
28de7948 CG |
744 | newfileset.logicalBlockNum += 1 + |
745 | ((le32_to_cpu(sp->numOfBytes) + | |
4b11111a MS |
746 | sizeof(struct spaceBitmapDesc) |
747 | - 1) >> sb->s_blocksize_bits); | |
28de7948 CG |
748 | brelse(bh); |
749 | break; | |
750 | } | |
cb00ea35 | 751 | case TAG_IDENT_FSD: |
28de7948 CG |
752 | *fileset = newfileset; |
753 | break; | |
cb00ea35 | 754 | default: |
28de7948 CG |
755 | newfileset.logicalBlockNum++; |
756 | brelse(bh); | |
757 | bh = NULL; | |
758 | break; | |
1da177e4 | 759 | } |
28de7948 CG |
760 | } while (newfileset.logicalBlockNum < lastblock && |
761 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
762 | fileset->partitionReferenceNum == 0xFFFF); | |
1da177e4 LT |
763 | } |
764 | } | |
765 | ||
766 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 767 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
1da177e4 | 768 | udf_debug("Fileset at block=%d, partition=%d\n", |
cb00ea35 CG |
769 | fileset->logicalBlockNum, |
770 | fileset->partitionReferenceNum); | |
1da177e4 | 771 | |
6c79e987 | 772 | sbi->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 773 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 774 | brelse(bh); |
1da177e4 LT |
775 | return 0; |
776 | } | |
777 | return 1; | |
778 | } | |
779 | ||
c0eb31ed | 780 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
781 | { |
782 | struct primaryVolDesc *pvoldesc; | |
ba9aadd8 | 783 | struct ustr *instr, *outstr; |
c0eb31ed JK |
784 | struct buffer_head *bh; |
785 | uint16_t ident; | |
ba9aadd8 MS |
786 | int ret = 1; |
787 | ||
788 | instr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
789 | if (!instr) | |
790 | return 1; | |
791 | ||
792 | outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
793 | if (!outstr) | |
794 | goto out1; | |
c0eb31ed JK |
795 | |
796 | bh = udf_read_tagged(sb, block, block, &ident); | |
797 | if (!bh) | |
ba9aadd8 MS |
798 | goto out2; |
799 | ||
c0eb31ed | 800 | BUG_ON(ident != TAG_IDENT_PVD); |
1da177e4 LT |
801 | |
802 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
803 | ||
56774805 MS |
804 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
805 | pvoldesc->recordingDateAndTime)) { | |
af15a298 | 806 | #ifdef UDFFS_DEBUG |
5ca4e4be | 807 | struct timestamp *ts = &pvoldesc->recordingDateAndTime; |
cbf5676a | 808 | udf_debug("recording time %04u/%02u/%02u" |
3a71fc5d | 809 | " %02u:%02u (%x)\n", |
af15a298 MS |
810 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, |
811 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
812 | #endif | |
1da177e4 LT |
813 | } |
814 | ||
ba9aadd8 MS |
815 | if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) |
816 | if (udf_CS0toUTF8(outstr, instr)) { | |
817 | strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, | |
818 | outstr->u_len > 31 ? 31 : outstr->u_len); | |
4b11111a MS |
819 | udf_debug("volIdent[] = '%s'\n", |
820 | UDF_SB(sb)->s_volume_ident); | |
1da177e4 | 821 | } |
1da177e4 | 822 | |
ba9aadd8 MS |
823 | if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) |
824 | if (udf_CS0toUTF8(outstr, instr)) | |
825 | udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); | |
c0eb31ed JK |
826 | |
827 | brelse(bh); | |
ba9aadd8 MS |
828 | ret = 0; |
829 | out2: | |
830 | kfree(outstr); | |
831 | out1: | |
832 | kfree(instr); | |
833 | return ret; | |
1da177e4 LT |
834 | } |
835 | ||
bfb257a5 JK |
836 | static int udf_load_metadata_files(struct super_block *sb, int partition) |
837 | { | |
838 | struct udf_sb_info *sbi = UDF_SB(sb); | |
839 | struct udf_part_map *map; | |
840 | struct udf_meta_data *mdata; | |
5ca4e4be | 841 | struct kernel_lb_addr addr; |
bfb257a5 JK |
842 | int fe_error = 0; |
843 | ||
844 | map = &sbi->s_partmaps[partition]; | |
845 | mdata = &map->s_type_specific.s_metadata; | |
846 | ||
847 | /* metadata address */ | |
848 | addr.logicalBlockNum = mdata->s_meta_file_loc; | |
849 | addr.partitionReferenceNum = map->s_partition_num; | |
850 | ||
851 | udf_debug("Metadata file location: block = %d part = %d\n", | |
852 | addr.logicalBlockNum, addr.partitionReferenceNum); | |
853 | ||
97e961fd | 854 | mdata->s_metadata_fe = udf_iget(sb, &addr); |
bfb257a5 JK |
855 | |
856 | if (mdata->s_metadata_fe == NULL) { | |
a40ecd7b | 857 | udf_warn(sb, "metadata inode efe not found, will try mirror inode\n"); |
bfb257a5 JK |
858 | fe_error = 1; |
859 | } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type != | |
860 | ICBTAG_FLAG_AD_SHORT) { | |
a40ecd7b | 861 | udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); |
bfb257a5 JK |
862 | fe_error = 1; |
863 | iput(mdata->s_metadata_fe); | |
864 | mdata->s_metadata_fe = NULL; | |
865 | } | |
866 | ||
867 | /* mirror file entry */ | |
868 | addr.logicalBlockNum = mdata->s_mirror_file_loc; | |
869 | addr.partitionReferenceNum = map->s_partition_num; | |
870 | ||
871 | udf_debug("Mirror metadata file location: block = %d part = %d\n", | |
872 | addr.logicalBlockNum, addr.partitionReferenceNum); | |
873 | ||
97e961fd | 874 | mdata->s_mirror_fe = udf_iget(sb, &addr); |
bfb257a5 JK |
875 | |
876 | if (mdata->s_mirror_fe == NULL) { | |
877 | if (fe_error) { | |
8076c363 | 878 | udf_err(sb, "mirror inode efe not found and metadata inode is missing too, exiting...\n"); |
bfb257a5 JK |
879 | goto error_exit; |
880 | } else | |
a40ecd7b | 881 | udf_warn(sb, "mirror inode efe not found, but metadata inode is OK\n"); |
bfb257a5 JK |
882 | } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type != |
883 | ICBTAG_FLAG_AD_SHORT) { | |
a40ecd7b | 884 | udf_warn(sb, "mirror inode efe does not have short allocation descriptors!\n"); |
bfb257a5 JK |
885 | iput(mdata->s_mirror_fe); |
886 | mdata->s_mirror_fe = NULL; | |
887 | if (fe_error) | |
888 | goto error_exit; | |
889 | } | |
890 | ||
891 | /* | |
892 | * bitmap file entry | |
893 | * Note: | |
894 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) | |
895 | */ | |
896 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { | |
897 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; | |
898 | addr.partitionReferenceNum = map->s_partition_num; | |
899 | ||
900 | udf_debug("Bitmap file location: block = %d part = %d\n", | |
901 | addr.logicalBlockNum, addr.partitionReferenceNum); | |
902 | ||
97e961fd | 903 | mdata->s_bitmap_fe = udf_iget(sb, &addr); |
bfb257a5 JK |
904 | |
905 | if (mdata->s_bitmap_fe == NULL) { | |
906 | if (sb->s_flags & MS_RDONLY) | |
a40ecd7b | 907 | udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); |
bfb257a5 | 908 | else { |
8076c363 | 909 | udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); |
bfb257a5 JK |
910 | goto error_exit; |
911 | } | |
912 | } | |
913 | } | |
914 | ||
915 | udf_debug("udf_load_metadata_files Ok\n"); | |
916 | ||
917 | return 0; | |
918 | ||
919 | error_exit: | |
920 | return 1; | |
921 | } | |
922 | ||
28de7948 | 923 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
5ca4e4be | 924 | struct kernel_lb_addr *root) |
1da177e4 LT |
925 | { |
926 | struct fileSetDesc *fset; | |
927 | ||
928 | fset = (struct fileSetDesc *)bh->b_data; | |
929 | ||
930 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
931 | ||
6c79e987 | 932 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 933 | |
cb00ea35 CG |
934 | udf_debug("Rootdir at block=%d, partition=%d\n", |
935 | root->logicalBlockNum, root->partitionReferenceNum); | |
1da177e4 LT |
936 | } |
937 | ||
883cb9d1 MS |
938 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
939 | { | |
940 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
941 | return DIV_ROUND_UP(map->s_partition_len + |
942 | (sizeof(struct spaceBitmapDesc) << 3), | |
943 | sb->s_blocksize * 8); | |
883cb9d1 MS |
944 | } |
945 | ||
66e1da3f MS |
946 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
947 | { | |
66e1da3f MS |
948 | struct udf_bitmap *bitmap; |
949 | int nr_groups; | |
950 | int size; | |
951 | ||
883cb9d1 | 952 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
953 | size = sizeof(struct udf_bitmap) + |
954 | (sizeof(struct buffer_head *) * nr_groups); | |
955 | ||
956 | if (size <= PAGE_SIZE) | |
ed2ae6f6 | 957 | bitmap = kzalloc(size, GFP_KERNEL); |
66e1da3f | 958 | else |
ed2ae6f6 | 959 | bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ |
66e1da3f MS |
960 | |
961 | if (bitmap == NULL) { | |
8076c363 JP |
962 | udf_err(sb, "Unable to allocate space for bitmap and %d buffer_head pointers\n", |
963 | nr_groups); | |
66e1da3f MS |
964 | return NULL; |
965 | } | |
966 | ||
66e1da3f MS |
967 | bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); |
968 | bitmap->s_nr_groups = nr_groups; | |
969 | return bitmap; | |
970 | } | |
971 | ||
3fb38dfa JK |
972 | static int udf_fill_partdesc_info(struct super_block *sb, |
973 | struct partitionDesc *p, int p_index) | |
1da177e4 | 974 | { |
6c79e987 | 975 | struct udf_part_map *map; |
165923fa | 976 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 977 | struct partitionHeaderDesc *phd; |
165923fa | 978 | |
3fb38dfa | 979 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
980 | |
981 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
982 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
983 | ||
984 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
985 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
986 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
987 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
988 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
989 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
990 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
991 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
992 | ||
706047a7 SM |
993 | udf_debug("Partition (%d type %x) starts at physical %d, " |
994 | "block length %d\n", p_index, | |
165923fa MS |
995 | map->s_partition_type, map->s_partition_root, |
996 | map->s_partition_len); | |
997 | ||
998 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
999 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
3fb38dfa | 1000 | return 0; |
165923fa MS |
1001 | |
1002 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1003 | if (phd->unallocSpaceTable.extLength) { | |
5ca4e4be | 1004 | struct kernel_lb_addr loc = { |
165923fa MS |
1005 | .logicalBlockNum = le32_to_cpu( |
1006 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 1007 | .partitionReferenceNum = p_index, |
165923fa MS |
1008 | }; |
1009 | ||
97e961fd | 1010 | map->s_uspace.s_table = udf_iget(sb, &loc); |
165923fa MS |
1011 | if (!map->s_uspace.s_table) { |
1012 | udf_debug("cannot load unallocSpaceTable (part %d)\n", | |
3fb38dfa JK |
1013 | p_index); |
1014 | return 1; | |
165923fa MS |
1015 | } |
1016 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; | |
1017 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", | |
3fb38dfa | 1018 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1019 | } |
1020 | ||
1021 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1022 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1023 | if (!bitmap) | |
1024 | return 1; | |
165923fa | 1025 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1026 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1027 | phd->unallocSpaceBitmap.extLength); |
2e0838fd | 1028 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1029 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1030 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
3fb38dfa | 1031 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index, |
2e0838fd | 1032 | bitmap->s_extPosition); |
165923fa MS |
1033 | } |
1034 | ||
1035 | if (phd->partitionIntegrityTable.extLength) | |
3fb38dfa | 1036 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); |
165923fa MS |
1037 | |
1038 | if (phd->freedSpaceTable.extLength) { | |
5ca4e4be | 1039 | struct kernel_lb_addr loc = { |
165923fa MS |
1040 | .logicalBlockNum = le32_to_cpu( |
1041 | phd->freedSpaceTable.extPosition), | |
3fb38dfa | 1042 | .partitionReferenceNum = p_index, |
165923fa MS |
1043 | }; |
1044 | ||
97e961fd | 1045 | map->s_fspace.s_table = udf_iget(sb, &loc); |
165923fa | 1046 | if (!map->s_fspace.s_table) { |
3fb38dfa JK |
1047 | udf_debug("cannot load freedSpaceTable (part %d)\n", |
1048 | p_index); | |
1049 | return 1; | |
165923fa MS |
1050 | } |
1051 | ||
1052 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; | |
1053 | udf_debug("freedSpaceTable (part %d) @ %ld\n", | |
3fb38dfa | 1054 | p_index, map->s_fspace.s_table->i_ino); |
165923fa MS |
1055 | } |
1056 | ||
1057 | if (phd->freedSpaceBitmap.extLength) { | |
3fb38dfa JK |
1058 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1059 | if (!bitmap) | |
1060 | return 1; | |
165923fa | 1061 | map->s_fspace.s_bitmap = bitmap; |
2e0838fd | 1062 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1063 | phd->freedSpaceBitmap.extLength); |
2e0838fd | 1064 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1065 | phd->freedSpaceBitmap.extPosition); |
2e0838fd | 1066 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
3fb38dfa | 1067 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index, |
2e0838fd | 1068 | bitmap->s_extPosition); |
165923fa | 1069 | } |
3fb38dfa JK |
1070 | return 0; |
1071 | } | |
1072 | ||
e971b0b9 JK |
1073 | static void udf_find_vat_block(struct super_block *sb, int p_index, |
1074 | int type1_index, sector_t start_block) | |
38b74a53 JK |
1075 | { |
1076 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1077 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
e971b0b9 | 1078 | sector_t vat_block; |
5ca4e4be | 1079 | struct kernel_lb_addr ino; |
e971b0b9 JK |
1080 | |
1081 | /* | |
1082 | * VAT file entry is in the last recorded block. Some broken disks have | |
1083 | * it a few blocks before so try a bit harder... | |
1084 | */ | |
1085 | ino.partitionReferenceNum = type1_index; | |
1086 | for (vat_block = start_block; | |
1087 | vat_block >= map->s_partition_root && | |
1088 | vat_block >= start_block - 3 && | |
1089 | !sbi->s_vat_inode; vat_block--) { | |
1090 | ino.logicalBlockNum = vat_block - map->s_partition_root; | |
1091 | sbi->s_vat_inode = udf_iget(sb, &ino); | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) | |
1096 | { | |
1097 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1098 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
fa5e0815 JK |
1099 | struct buffer_head *bh = NULL; |
1100 | struct udf_inode_info *vati; | |
1101 | uint32_t pos; | |
1102 | struct virtualAllocationTable20 *vat20; | |
4bf17af0 | 1103 | sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; |
38b74a53 | 1104 | |
e971b0b9 | 1105 | udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); |
4bf17af0 JK |
1106 | if (!sbi->s_vat_inode && |
1107 | sbi->s_last_block != blocks - 1) { | |
78ace70c JP |
1108 | pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", |
1109 | (unsigned long)sbi->s_last_block, | |
1110 | (unsigned long)blocks - 1); | |
e971b0b9 | 1111 | udf_find_vat_block(sb, p_index, type1_index, blocks - 1); |
4bf17af0 | 1112 | } |
38b74a53 JK |
1113 | if (!sbi->s_vat_inode) |
1114 | return 1; | |
1115 | ||
1116 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
47c9358a | 1117 | map->s_type_specific.s_virtual.s_start_offset = 0; |
38b74a53 JK |
1118 | map->s_type_specific.s_virtual.s_num_entries = |
1119 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1120 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
fa5e0815 JK |
1121 | vati = UDF_I(sbi->s_vat_inode); |
1122 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1123 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1124 | bh = sb_bread(sb, pos); | |
1125 | if (!bh) | |
1126 | return 1; | |
1127 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; | |
1128 | } else { | |
1129 | vat20 = (struct virtualAllocationTable20 *) | |
1130 | vati->i_ext.i_data; | |
1131 | } | |
38b74a53 | 1132 | |
38b74a53 | 1133 | map->s_type_specific.s_virtual.s_start_offset = |
47c9358a | 1134 | le16_to_cpu(vat20->lengthHeader); |
38b74a53 JK |
1135 | map->s_type_specific.s_virtual.s_num_entries = |
1136 | (sbi->s_vat_inode->i_size - | |
1137 | map->s_type_specific.s_virtual. | |
1138 | s_start_offset) >> 2; | |
1139 | brelse(bh); | |
1140 | } | |
1141 | return 0; | |
1142 | } | |
1143 | ||
3fb38dfa JK |
1144 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
1145 | { | |
1146 | struct buffer_head *bh; | |
1147 | struct partitionDesc *p; | |
1148 | struct udf_part_map *map; | |
1149 | struct udf_sb_info *sbi = UDF_SB(sb); | |
38b74a53 | 1150 | int i, type1_idx; |
3fb38dfa JK |
1151 | uint16_t partitionNumber; |
1152 | uint16_t ident; | |
1153 | int ret = 0; | |
1154 | ||
1155 | bh = udf_read_tagged(sb, block, block, &ident); | |
1156 | if (!bh) | |
1157 | return 1; | |
1158 | if (ident != TAG_IDENT_PD) | |
1159 | goto out_bh; | |
1160 | ||
1161 | p = (struct partitionDesc *)bh->b_data; | |
1162 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
38b74a53 | 1163 | |
bfb257a5 | 1164 | /* First scan for TYPE1, SPARABLE and METADATA partitions */ |
3fb38dfa JK |
1165 | for (i = 0; i < sbi->s_partitions; i++) { |
1166 | map = &sbi->s_partmaps[i]; | |
1167 | udf_debug("Searching map: (%d == %d)\n", | |
1168 | map->s_partition_num, partitionNumber); | |
38b74a53 JK |
1169 | if (map->s_partition_num == partitionNumber && |
1170 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1171 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
3fb38dfa JK |
1172 | break; |
1173 | } | |
1174 | ||
38b74a53 | 1175 | if (i >= sbi->s_partitions) { |
3fb38dfa JK |
1176 | udf_debug("Partition (%d) not found in partition map\n", |
1177 | partitionNumber); | |
1178 | goto out_bh; | |
1179 | } | |
165923fa | 1180 | |
3fb38dfa | 1181 | ret = udf_fill_partdesc_info(sb, p, i); |
38b74a53 JK |
1182 | |
1183 | /* | |
bfb257a5 JK |
1184 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
1185 | * PHYSICAL partitions are already set up | |
38b74a53 JK |
1186 | */ |
1187 | type1_idx = i; | |
1188 | for (i = 0; i < sbi->s_partitions; i++) { | |
1189 | map = &sbi->s_partmaps[i]; | |
1190 | ||
1191 | if (map->s_partition_num == partitionNumber && | |
1192 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
bfb257a5 JK |
1193 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
1194 | map->s_partition_type == UDF_METADATA_MAP25)) | |
38b74a53 JK |
1195 | break; |
1196 | } | |
1197 | ||
1198 | if (i >= sbi->s_partitions) | |
1199 | goto out_bh; | |
1200 | ||
1201 | ret = udf_fill_partdesc_info(sb, p, i); | |
1202 | if (ret) | |
1203 | goto out_bh; | |
1204 | ||
bfb257a5 JK |
1205 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
1206 | ret = udf_load_metadata_files(sb, i); | |
1207 | if (ret) { | |
78ace70c JP |
1208 | udf_err(sb, "error loading MetaData partition map %d\n", |
1209 | i); | |
bfb257a5 JK |
1210 | goto out_bh; |
1211 | } | |
1212 | } else { | |
1213 | ret = udf_load_vat(sb, i, type1_idx); | |
1214 | if (ret) | |
1215 | goto out_bh; | |
1216 | /* | |
1217 | * Mark filesystem read-only if we have a partition with | |
1218 | * virtual map since we don't handle writing to it (we | |
1219 | * overwrite blocks instead of relocating them). | |
1220 | */ | |
1221 | sb->s_flags |= MS_RDONLY; | |
78ace70c | 1222 | pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n"); |
bfb257a5 | 1223 | } |
c0eb31ed | 1224 | out_bh: |
2e0838fd | 1225 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1226 | brelse(bh); |
1227 | return ret; | |
1da177e4 LT |
1228 | } |
1229 | ||
c0eb31ed | 1230 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
5ca4e4be | 1231 | struct kernel_lb_addr *fileset) |
1da177e4 LT |
1232 | { |
1233 | struct logicalVolDesc *lvd; | |
1234 | int i, j, offset; | |
1235 | uint8_t type; | |
6c79e987 | 1236 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1237 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1238 | uint16_t ident; |
1239 | struct buffer_head *bh; | |
1240 | int ret = 0; | |
1da177e4 | 1241 | |
c0eb31ed JK |
1242 | bh = udf_read_tagged(sb, block, block, &ident); |
1243 | if (!bh) | |
1244 | return 1; | |
1245 | BUG_ON(ident != TAG_IDENT_LVD); | |
1da177e4 LT |
1246 | lvd = (struct logicalVolDesc *)bh->b_data; |
1247 | ||
dc5d39be | 1248 | i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
c0eb31ed JK |
1249 | if (i != 0) { |
1250 | ret = i; | |
1251 | goto out_bh; | |
1252 | } | |
1da177e4 | 1253 | |
cb00ea35 | 1254 | for (i = 0, offset = 0; |
6c79e987 | 1255 | i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength); |
4b11111a MS |
1256 | i++, offset += gpm->partitionMapLength) { |
1257 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1258 | gpm = (struct genericPartitionMap *) | |
1259 | &(lvd->partitionMaps[offset]); | |
1260 | type = gpm->partitionMapType; | |
cb00ea35 | 1261 | if (type == 1) { |
4b11111a MS |
1262 | struct genericPartitionMap1 *gpm1 = |
1263 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1264 | map->s_partition_type = UDF_TYPE1_MAP15; |
1265 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1266 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1267 | map->s_partition_func = NULL; | |
cb00ea35 | 1268 | } else if (type == 2) { |
4b11111a MS |
1269 | struct udfPartitionMap2 *upm2 = |
1270 | (struct udfPartitionMap2 *)gpm; | |
1271 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1272 | strlen(UDF_ID_VIRTUAL))) { | |
1273 | u16 suf = | |
1274 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1275 | identSuffix)[0]); | |
c82a1275 | 1276 | if (suf < 0x0200) { |
4b11111a MS |
1277 | map->s_partition_type = |
1278 | UDF_VIRTUAL_MAP15; | |
1279 | map->s_partition_func = | |
1280 | udf_get_pblock_virt15; | |
c82a1275 | 1281 | } else { |
4b11111a MS |
1282 | map->s_partition_type = |
1283 | UDF_VIRTUAL_MAP20; | |
1284 | map->s_partition_func = | |
1285 | udf_get_pblock_virt20; | |
1da177e4 | 1286 | } |
4b11111a MS |
1287 | } else if (!strncmp(upm2->partIdent.ident, |
1288 | UDF_ID_SPARABLE, | |
1289 | strlen(UDF_ID_SPARABLE))) { | |
1da177e4 | 1290 | uint32_t loc; |
1da177e4 | 1291 | struct sparingTable *st; |
4b11111a MS |
1292 | struct sparablePartitionMap *spm = |
1293 | (struct sparablePartitionMap *)gpm; | |
28de7948 | 1294 | |
6c79e987 | 1295 | map->s_partition_type = UDF_SPARABLE_MAP15; |
4b11111a MS |
1296 | map->s_type_specific.s_sparing.s_packet_len = |
1297 | le16_to_cpu(spm->packetLength); | |
cb00ea35 | 1298 | for (j = 0; j < spm->numSparingTables; j++) { |
4b11111a MS |
1299 | struct buffer_head *bh2; |
1300 | ||
1301 | loc = le32_to_cpu( | |
1302 | spm->locSparingTable[j]); | |
1303 | bh2 = udf_read_tagged(sb, loc, loc, | |
1304 | &ident); | |
1305 | map->s_type_specific.s_sparing. | |
1306 | s_spar_map[j] = bh2; | |
1307 | ||
165923fa MS |
1308 | if (bh2 == NULL) |
1309 | continue; | |
1310 | ||
1311 | st = (struct sparingTable *)bh2->b_data; | |
1312 | if (ident != 0 || strncmp( | |
1313 | st->sparingIdent.ident, | |
1314 | UDF_ID_SPARING, | |
1315 | strlen(UDF_ID_SPARING))) { | |
1316 | brelse(bh2); | |
1317 | map->s_type_specific.s_sparing. | |
1318 | s_spar_map[j] = NULL; | |
1da177e4 LT |
1319 | } |
1320 | } | |
6c79e987 | 1321 | map->s_partition_func = udf_get_pblock_spar15; |
bfb257a5 JK |
1322 | } else if (!strncmp(upm2->partIdent.ident, |
1323 | UDF_ID_METADATA, | |
1324 | strlen(UDF_ID_METADATA))) { | |
1325 | struct udf_meta_data *mdata = | |
1326 | &map->s_type_specific.s_metadata; | |
1327 | struct metadataPartitionMap *mdm = | |
1328 | (struct metadataPartitionMap *) | |
1329 | &(lvd->partitionMaps[offset]); | |
1330 | udf_debug("Parsing Logical vol part %d " | |
1331 | "type %d id=%s\n", i, type, | |
1332 | UDF_ID_METADATA); | |
1333 | ||
1334 | map->s_partition_type = UDF_METADATA_MAP25; | |
1335 | map->s_partition_func = udf_get_pblock_meta25; | |
1336 | ||
1337 | mdata->s_meta_file_loc = | |
1338 | le32_to_cpu(mdm->metadataFileLoc); | |
1339 | mdata->s_mirror_file_loc = | |
1340 | le32_to_cpu(mdm->metadataMirrorFileLoc); | |
1341 | mdata->s_bitmap_file_loc = | |
1342 | le32_to_cpu(mdm->metadataBitmapFileLoc); | |
1343 | mdata->s_alloc_unit_size = | |
1344 | le32_to_cpu(mdm->allocUnitSize); | |
1345 | mdata->s_align_unit_size = | |
1346 | le16_to_cpu(mdm->alignUnitSize); | |
1347 | mdata->s_dup_md_flag = | |
1348 | mdm->flags & 0x01; | |
1349 | ||
1350 | udf_debug("Metadata Ident suffix=0x%x\n", | |
1351 | (le16_to_cpu( | |
1352 | ((__le16 *) | |
1353 | mdm->partIdent.identSuffix)[0]))); | |
1354 | udf_debug("Metadata part num=%d\n", | |
1355 | le16_to_cpu(mdm->partitionNum)); | |
1356 | udf_debug("Metadata part alloc unit size=%d\n", | |
1357 | le32_to_cpu(mdm->allocUnitSize)); | |
1358 | udf_debug("Metadata file loc=%d\n", | |
1359 | le32_to_cpu(mdm->metadataFileLoc)); | |
1360 | udf_debug("Mirror file loc=%d\n", | |
1361 | le32_to_cpu(mdm->metadataMirrorFileLoc)); | |
1362 | udf_debug("Bitmap file loc=%d\n", | |
1363 | le32_to_cpu(mdm->metadataBitmapFileLoc)); | |
1364 | udf_debug("Duplicate Flag: %d %d\n", | |
1365 | mdata->s_dup_md_flag, mdm->flags); | |
cb00ea35 | 1366 | } else { |
3a71fc5d MS |
1367 | udf_debug("Unknown ident: %s\n", |
1368 | upm2->partIdent.ident); | |
1da177e4 LT |
1369 | continue; |
1370 | } | |
6c79e987 MS |
1371 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1372 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 LT |
1373 | } |
1374 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
6c79e987 MS |
1375 | i, map->s_partition_num, type, |
1376 | map->s_volumeseqnum); | |
1da177e4 LT |
1377 | } |
1378 | ||
cb00ea35 | 1379 | if (fileset) { |
5ca4e4be | 1380 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1381 | |
1382 | *fileset = lelb_to_cpu(la->extLocation); | |
3a71fc5d MS |
1383 | udf_debug("FileSet found in LogicalVolDesc at block=%d, " |
1384 | "partition=%d\n", fileset->logicalBlockNum, | |
28de7948 | 1385 | fileset->partitionReferenceNum); |
1da177e4 LT |
1386 | } |
1387 | if (lvd->integritySeqExt.extLength) | |
1388 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
28de7948 | 1389 | |
c0eb31ed JK |
1390 | out_bh: |
1391 | brelse(bh); | |
1392 | return ret; | |
1da177e4 LT |
1393 | } |
1394 | ||
1395 | /* | |
1396 | * udf_load_logicalvolint | |
1397 | * | |
1398 | */ | |
5ca4e4be | 1399 | static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) |
1da177e4 LT |
1400 | { |
1401 | struct buffer_head *bh = NULL; | |
1402 | uint16_t ident; | |
6c79e987 MS |
1403 | struct udf_sb_info *sbi = UDF_SB(sb); |
1404 | struct logicalVolIntegrityDesc *lvid; | |
1da177e4 LT |
1405 | |
1406 | while (loc.extLength > 0 && | |
cb00ea35 CG |
1407 | (bh = udf_read_tagged(sb, loc.extLocation, |
1408 | loc.extLocation, &ident)) && | |
1409 | ident == TAG_IDENT_LVID) { | |
6c79e987 MS |
1410 | sbi->s_lvid_bh = bh; |
1411 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
cb00ea35 | 1412 | |
6c79e987 | 1413 | if (lvid->nextIntegrityExt.extLength) |
3a71fc5d | 1414 | udf_load_logicalvolint(sb, |
6c79e987 | 1415 | leea_to_cpu(lvid->nextIntegrityExt)); |
cb00ea35 | 1416 | |
6c79e987 | 1417 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1418 | brelse(bh); |
1da177e4 | 1419 | loc.extLength -= sb->s_blocksize; |
cb00ea35 | 1420 | loc.extLocation++; |
1da177e4 | 1421 | } |
6c79e987 | 1422 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1423 | brelse(bh); |
1da177e4 LT |
1424 | } |
1425 | ||
1426 | /* | |
1427 | * udf_process_sequence | |
1428 | * | |
1429 | * PURPOSE | |
1430 | * Process a main/reserve volume descriptor sequence. | |
1431 | * | |
1432 | * PRE-CONDITIONS | |
1433 | * sb Pointer to _locked_ superblock. | |
1434 | * block First block of first extent of the sequence. | |
1435 | * lastblock Lastblock of first extent of the sequence. | |
1436 | * | |
1437 | * HISTORY | |
1438 | * July 1, 1997 - Andrew E. Mileski | |
1439 | * Written, tested, and released. | |
1440 | */ | |
200a3592 | 1441 | static noinline int udf_process_sequence(struct super_block *sb, long block, |
5ca4e4be | 1442 | long lastblock, struct kernel_lb_addr *fileset) |
1da177e4 LT |
1443 | { |
1444 | struct buffer_head *bh = NULL; | |
1445 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
4b11111a | 1446 | struct udf_vds_record *curr; |
1da177e4 LT |
1447 | struct generic_desc *gd; |
1448 | struct volDescPtr *vdp; | |
cb00ea35 | 1449 | int done = 0; |
1da177e4 LT |
1450 | uint32_t vdsn; |
1451 | uint16_t ident; | |
1452 | long next_s = 0, next_e = 0; | |
1453 | ||
1454 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1455 | ||
c0eb31ed JK |
1456 | /* |
1457 | * Read the main descriptor sequence and find which descriptors | |
1458 | * are in it. | |
1459 | */ | |
cb00ea35 | 1460 | for (; (!done && block <= lastblock); block++) { |
1da177e4 LT |
1461 | |
1462 | bh = udf_read_tagged(sb, block, block, &ident); | |
c0eb31ed | 1463 | if (!bh) { |
78ace70c JP |
1464 | udf_err(sb, |
1465 | "Block %llu of volume descriptor sequence is corrupted or we could not read it\n", | |
1466 | (unsigned long long)block); | |
c0eb31ed JK |
1467 | return 1; |
1468 | } | |
1da177e4 LT |
1469 | |
1470 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1471 | gd = (struct generic_desc *)bh->b_data; | |
1472 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1473 | switch (ident) { |
28de7948 | 1474 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
4b11111a MS |
1475 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
1476 | if (vdsn >= curr->volDescSeqNum) { | |
1477 | curr->volDescSeqNum = vdsn; | |
1478 | curr->block = block; | |
cb00ea35 CG |
1479 | } |
1480 | break; | |
28de7948 | 1481 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
4b11111a MS |
1482 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
1483 | if (vdsn >= curr->volDescSeqNum) { | |
1484 | curr->volDescSeqNum = vdsn; | |
1485 | curr->block = block; | |
cb00ea35 CG |
1486 | |
1487 | vdp = (struct volDescPtr *)bh->b_data; | |
4b11111a MS |
1488 | next_s = le32_to_cpu( |
1489 | vdp->nextVolDescSeqExt.extLocation); | |
1490 | next_e = le32_to_cpu( | |
1491 | vdp->nextVolDescSeqExt.extLength); | |
cb00ea35 CG |
1492 | next_e = next_e >> sb->s_blocksize_bits; |
1493 | next_e += next_s; | |
1494 | } | |
1495 | break; | |
28de7948 | 1496 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
4b11111a MS |
1497 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
1498 | if (vdsn >= curr->volDescSeqNum) { | |
1499 | curr->volDescSeqNum = vdsn; | |
1500 | curr->block = block; | |
cb00ea35 CG |
1501 | } |
1502 | break; | |
28de7948 | 1503 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
4b11111a MS |
1504 | curr = &vds[VDS_POS_PARTITION_DESC]; |
1505 | if (!curr->block) | |
1506 | curr->block = block; | |
cb00ea35 | 1507 | break; |
28de7948 | 1508 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
4b11111a MS |
1509 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
1510 | if (vdsn >= curr->volDescSeqNum) { | |
1511 | curr->volDescSeqNum = vdsn; | |
1512 | curr->block = block; | |
cb00ea35 CG |
1513 | } |
1514 | break; | |
28de7948 | 1515 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
4b11111a MS |
1516 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
1517 | if (vdsn >= curr->volDescSeqNum) { | |
1518 | curr->volDescSeqNum = vdsn; | |
1519 | curr->block = block; | |
cb00ea35 CG |
1520 | } |
1521 | break; | |
28de7948 | 1522 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
cb00ea35 CG |
1523 | vds[VDS_POS_TERMINATING_DESC].block = block; |
1524 | if (next_e) { | |
1525 | block = next_s; | |
1526 | lastblock = next_e; | |
1527 | next_s = next_e = 0; | |
4b11111a | 1528 | } else |
cb00ea35 CG |
1529 | done = 1; |
1530 | break; | |
1da177e4 | 1531 | } |
3bf25cb4 | 1532 | brelse(bh); |
1da177e4 | 1533 | } |
c0eb31ed JK |
1534 | /* |
1535 | * Now read interesting descriptors again and process them | |
1536 | * in a suitable order | |
1537 | */ | |
1538 | if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { | |
78ace70c | 1539 | udf_err(sb, "Primary Volume Descriptor not found!\n"); |
c0eb31ed JK |
1540 | return 1; |
1541 | } | |
1542 | if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) | |
1543 | return 1; | |
165923fa | 1544 | |
c0eb31ed JK |
1545 | if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, |
1546 | vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) | |
1547 | return 1; | |
165923fa | 1548 | |
c0eb31ed JK |
1549 | if (vds[VDS_POS_PARTITION_DESC].block) { |
1550 | /* | |
1551 | * We rescan the whole descriptor sequence to find | |
1552 | * partition descriptor blocks and process them. | |
1553 | */ | |
1554 | for (block = vds[VDS_POS_PARTITION_DESC].block; | |
1555 | block < vds[VDS_POS_TERMINATING_DESC].block; | |
1556 | block++) | |
1557 | if (udf_load_partdesc(sb, block)) | |
165923fa | 1558 | return 1; |
1da177e4 LT |
1559 | } |
1560 | ||
1561 | return 0; | |
1562 | } | |
1563 | ||
40346005 JK |
1564 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, |
1565 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1566 | { |
40346005 JK |
1567 | struct anchorVolDescPtr *anchor; |
1568 | long main_s, main_e, reserve_s, reserve_e; | |
1da177e4 | 1569 | |
40346005 JK |
1570 | anchor = (struct anchorVolDescPtr *)bh->b_data; |
1571 | ||
1572 | /* Locate the main sequence */ | |
1573 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1574 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1575 | main_e = main_e >> sb->s_blocksize_bits; | |
1576 | main_e += main_s; | |
1577 | ||
1578 | /* Locate the reserve sequence */ | |
1579 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); | |
1580 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); | |
1581 | reserve_e = reserve_e >> sb->s_blocksize_bits; | |
1582 | reserve_e += reserve_s; | |
1583 | ||
1584 | /* Process the main & reserve sequences */ | |
1585 | /* responsible for finding the PartitionDesc(s) */ | |
1586 | if (!udf_process_sequence(sb, main_s, main_e, fileset)) | |
1587 | return 1; | |
1588 | return !udf_process_sequence(sb, reserve_s, reserve_e, fileset); | |
1da177e4 LT |
1589 | } |
1590 | ||
40346005 JK |
1591 | /* |
1592 | * Check whether there is an anchor block in the given block and | |
1593 | * load Volume Descriptor Sequence if so. | |
1594 | */ | |
1595 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, | |
1596 | struct kernel_lb_addr *fileset) | |
1197e4df | 1597 | { |
40346005 JK |
1598 | struct buffer_head *bh; |
1599 | uint16_t ident; | |
1600 | int ret; | |
1197e4df | 1601 | |
40346005 JK |
1602 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
1603 | udf_fixed_to_variable(block) >= | |
1604 | sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) | |
1197e4df | 1605 | return 0; |
40346005 JK |
1606 | |
1607 | bh = udf_read_tagged(sb, block, block, &ident); | |
1608 | if (!bh) | |
1197e4df | 1609 | return 0; |
40346005 JK |
1610 | if (ident != TAG_IDENT_AVDP) { |
1611 | brelse(bh); | |
1197e4df CL |
1612 | return 0; |
1613 | } | |
40346005 JK |
1614 | ret = udf_load_sequence(sb, bh, fileset); |
1615 | brelse(bh); | |
1616 | return ret; | |
1197e4df CL |
1617 | } |
1618 | ||
40346005 JK |
1619 | /* Search for an anchor volume descriptor pointer */ |
1620 | static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock, | |
1621 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1622 | { |
40346005 | 1623 | sector_t last[6]; |
38b74a53 | 1624 | int i; |
40346005 JK |
1625 | struct udf_sb_info *sbi = UDF_SB(sb); |
1626 | int last_count = 0; | |
1da177e4 | 1627 | |
40346005 JK |
1628 | /* First try user provided anchor */ |
1629 | if (sbi->s_anchor) { | |
1630 | if (udf_check_anchor_block(sb, sbi->s_anchor, fileset)) | |
1631 | return lastblock; | |
1632 | } | |
1633 | /* | |
1634 | * according to spec, anchor is in either: | |
1635 | * block 256 | |
1636 | * lastblock-256 | |
1637 | * lastblock | |
1638 | * however, if the disc isn't closed, it could be 512. | |
1639 | */ | |
1640 | if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset)) | |
1641 | return lastblock; | |
1642 | /* | |
1643 | * The trouble is which block is the last one. Drives often misreport | |
1644 | * this so we try various possibilities. | |
1645 | */ | |
1646 | last[last_count++] = lastblock; | |
1647 | if (lastblock >= 1) | |
1648 | last[last_count++] = lastblock - 1; | |
1649 | last[last_count++] = lastblock + 1; | |
1650 | if (lastblock >= 2) | |
1651 | last[last_count++] = lastblock - 2; | |
1652 | if (lastblock >= 150) | |
1653 | last[last_count++] = lastblock - 150; | |
1654 | if (lastblock >= 152) | |
1655 | last[last_count++] = lastblock - 152; | |
1da177e4 | 1656 | |
40346005 JK |
1657 | for (i = 0; i < last_count; i++) { |
1658 | if (last[i] >= sb->s_bdev->bd_inode->i_size >> | |
1659 | sb->s_blocksize_bits) | |
28f7c4d4 | 1660 | continue; |
40346005 JK |
1661 | if (udf_check_anchor_block(sb, last[i], fileset)) |
1662 | return last[i]; | |
1663 | if (last[i] < 256) | |
28f7c4d4 | 1664 | continue; |
40346005 JK |
1665 | if (udf_check_anchor_block(sb, last[i] - 256, fileset)) |
1666 | return last[i]; | |
1667 | } | |
28f7c4d4 | 1668 | |
40346005 JK |
1669 | /* Finally try block 512 in case media is open */ |
1670 | if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset)) | |
1671 | return last[0]; | |
1672 | return 0; | |
1673 | } | |
28f7c4d4 | 1674 | |
40346005 JK |
1675 | /* |
1676 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from | |
1677 | * area specified by it. The function expects sbi->s_lastblock to be the last | |
1678 | * block on the media. | |
1679 | * | |
1680 | * Return 1 if ok, 0 if not found. | |
1681 | * | |
1682 | */ | |
1683 | static int udf_find_anchor(struct super_block *sb, | |
1684 | struct kernel_lb_addr *fileset) | |
1685 | { | |
1686 | sector_t lastblock; | |
1687 | struct udf_sb_info *sbi = UDF_SB(sb); | |
28f7c4d4 | 1688 | |
40346005 JK |
1689 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); |
1690 | if (lastblock) | |
1691 | goto out; | |
1da177e4 | 1692 | |
40346005 JK |
1693 | /* No anchor found? Try VARCONV conversion of block numbers */ |
1694 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
1695 | /* Firstly, we try to not convert number of the last block */ | |
1696 | lastblock = udf_scan_anchors(sb, | |
1697 | udf_variable_to_fixed(sbi->s_last_block), | |
1698 | fileset); | |
1699 | if (lastblock) | |
1700 | goto out; | |
1da177e4 | 1701 | |
40346005 JK |
1702 | /* Secondly, we try with converted number of the last block */ |
1703 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); | |
1704 | if (!lastblock) { | |
1705 | /* VARCONV didn't help. Clear it. */ | |
1706 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); | |
1707 | return 0; | |
1da177e4 | 1708 | } |
40346005 JK |
1709 | out: |
1710 | sbi->s_last_block = lastblock; | |
1711 | return 1; | |
1712 | } | |
1da177e4 | 1713 | |
40346005 JK |
1714 | /* |
1715 | * Check Volume Structure Descriptor, find Anchor block and load Volume | |
1716 | * Descriptor Sequence | |
1717 | */ | |
1718 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, | |
1719 | int silent, struct kernel_lb_addr *fileset) | |
1720 | { | |
1721 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1722 | loff_t nsr_off; | |
1723 | ||
1724 | if (!sb_set_blocksize(sb, uopt->blocksize)) { | |
1725 | if (!silent) | |
78ace70c | 1726 | udf_warn(sb, "Bad block size\n"); |
40346005 JK |
1727 | return 0; |
1728 | } | |
1729 | sbi->s_last_block = uopt->lastblock; | |
1730 | if (!uopt->novrs) { | |
1731 | /* Check that it is NSR02 compliant */ | |
1732 | nsr_off = udf_check_vsd(sb); | |
1733 | if (!nsr_off) { | |
1734 | if (!silent) | |
78ace70c | 1735 | udf_warn(sb, "No VRS found\n"); |
40346005 JK |
1736 | return 0; |
1737 | } | |
1738 | if (nsr_off == -1) | |
1739 | udf_debug("Failed to read byte 32768. Assuming open " | |
1740 | "disc. Skipping validity check\n"); | |
1741 | if (!sbi->s_last_block) | |
1742 | sbi->s_last_block = udf_get_last_block(sb); | |
1743 | } else { | |
1744 | udf_debug("Validity check skipped because of novrs option\n"); | |
28f7c4d4 | 1745 | } |
1da177e4 | 1746 | |
40346005 JK |
1747 | /* Look for anchor block and load Volume Descriptor Sequence */ |
1748 | sbi->s_anchor = uopt->anchor; | |
1749 | if (!udf_find_anchor(sb, fileset)) { | |
1750 | if (!silent) | |
78ace70c | 1751 | udf_warn(sb, "No anchor found\n"); |
40346005 JK |
1752 | return 0; |
1753 | } | |
1754 | return 1; | |
1da177e4 LT |
1755 | } |
1756 | ||
1757 | static void udf_open_lvid(struct super_block *sb) | |
1758 | { | |
6c79e987 MS |
1759 | struct udf_sb_info *sbi = UDF_SB(sb); |
1760 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
1761 | struct logicalVolIntegrityDesc *lvid; |
1762 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
146bca72 | 1763 | |
165923fa MS |
1764 | if (!bh) |
1765 | return; | |
949f4a7c JK |
1766 | |
1767 | mutex_lock(&sbi->s_alloc_mutex); | |
165923fa MS |
1768 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
1769 | lvidiu = udf_sb_lvidiu(sbi); | |
1770 | ||
1771 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1772 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1773 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, | |
1774 | CURRENT_TIME); | |
146bca72 | 1775 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); |
165923fa MS |
1776 | |
1777 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1778 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 1779 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
1780 | |
1781 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1782 | mark_buffer_dirty(bh); | |
146bca72 | 1783 | sbi->s_lvid_dirty = 0; |
949f4a7c | 1784 | mutex_unlock(&sbi->s_alloc_mutex); |
1da177e4 LT |
1785 | } |
1786 | ||
1787 | static void udf_close_lvid(struct super_block *sb) | |
1788 | { | |
6c79e987 MS |
1789 | struct udf_sb_info *sbi = UDF_SB(sb); |
1790 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1791 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 1792 | struct logicalVolIntegrityDescImpUse *lvidiu; |
28de7948 | 1793 | |
6c79e987 MS |
1794 | if (!bh) |
1795 | return; | |
1796 | ||
949f4a7c | 1797 | mutex_lock(&sbi->s_alloc_mutex); |
6c79e987 | 1798 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
165923fa MS |
1799 | lvidiu = udf_sb_lvidiu(sbi); |
1800 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1801 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1802 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); | |
1803 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) | |
1804 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
1805 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
1806 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
1807 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
1808 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
1809 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
1810 | ||
1811 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1812 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 1813 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
1814 | |
1815 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1816 | mark_buffer_dirty(bh); | |
146bca72 | 1817 | sbi->s_lvid_dirty = 0; |
949f4a7c | 1818 | mutex_unlock(&sbi->s_alloc_mutex); |
1da177e4 LT |
1819 | } |
1820 | ||
d664b6af JK |
1821 | u64 lvid_get_unique_id(struct super_block *sb) |
1822 | { | |
1823 | struct buffer_head *bh; | |
1824 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1825 | struct logicalVolIntegrityDesc *lvid; | |
1826 | struct logicalVolHeaderDesc *lvhd; | |
1827 | u64 uniqueID; | |
1828 | u64 ret; | |
1829 | ||
1830 | bh = sbi->s_lvid_bh; | |
1831 | if (!bh) | |
1832 | return 0; | |
1833 | ||
1834 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1835 | lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; | |
1836 | ||
1837 | mutex_lock(&sbi->s_alloc_mutex); | |
1838 | ret = uniqueID = le64_to_cpu(lvhd->uniqueID); | |
1839 | if (!(++uniqueID & 0xFFFFFFFF)) | |
1840 | uniqueID += 16; | |
1841 | lvhd->uniqueID = cpu_to_le64(uniqueID); | |
1842 | mutex_unlock(&sbi->s_alloc_mutex); | |
1843 | mark_buffer_dirty(bh); | |
1844 | ||
1845 | return ret; | |
1da177e4 LT |
1846 | } |
1847 | ||
66e1da3f MS |
1848 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
1849 | { | |
1850 | int i; | |
1851 | int nr_groups = bitmap->s_nr_groups; | |
4b11111a MS |
1852 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * |
1853 | nr_groups); | |
66e1da3f MS |
1854 | |
1855 | for (i = 0; i < nr_groups; i++) | |
1856 | if (bitmap->s_block_bitmap[i]) | |
1857 | brelse(bitmap->s_block_bitmap[i]); | |
1858 | ||
1859 | if (size <= PAGE_SIZE) | |
1860 | kfree(bitmap); | |
1861 | else | |
1862 | vfree(bitmap); | |
1863 | } | |
1864 | ||
2e0838fd JK |
1865 | static void udf_free_partition(struct udf_part_map *map) |
1866 | { | |
1867 | int i; | |
bfb257a5 | 1868 | struct udf_meta_data *mdata; |
2e0838fd JK |
1869 | |
1870 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
1871 | iput(map->s_uspace.s_table); | |
1872 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
1873 | iput(map->s_fspace.s_table); | |
1874 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
1875 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
1876 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) | |
1877 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); | |
1878 | if (map->s_partition_type == UDF_SPARABLE_MAP15) | |
1879 | for (i = 0; i < 4; i++) | |
1880 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
bfb257a5 JK |
1881 | else if (map->s_partition_type == UDF_METADATA_MAP25) { |
1882 | mdata = &map->s_type_specific.s_metadata; | |
1883 | iput(mdata->s_metadata_fe); | |
1884 | mdata->s_metadata_fe = NULL; | |
1885 | ||
1886 | iput(mdata->s_mirror_fe); | |
1887 | mdata->s_mirror_fe = NULL; | |
1888 | ||
1889 | iput(mdata->s_bitmap_fe); | |
1890 | mdata->s_bitmap_fe = NULL; | |
1891 | } | |
2e0838fd JK |
1892 | } |
1893 | ||
1da177e4 LT |
1894 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
1895 | { | |
1896 | int i; | |
40346005 | 1897 | int ret; |
cb00ea35 | 1898 | struct inode *inode = NULL; |
1da177e4 | 1899 | struct udf_options uopt; |
5ca4e4be | 1900 | struct kernel_lb_addr rootdir, fileset; |
1da177e4 LT |
1901 | struct udf_sb_info *sbi; |
1902 | ||
1903 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
1904 | uopt.uid = -1; | |
1905 | uopt.gid = -1; | |
1906 | uopt.umask = 0; | |
87bc730c MS |
1907 | uopt.fmode = UDF_INVALID_MODE; |
1908 | uopt.dmode = UDF_INVALID_MODE; | |
1da177e4 | 1909 | |
6c79e987 | 1910 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
9db9f9e3 | 1911 | if (!sbi) |
1da177e4 | 1912 | return -ENOMEM; |
28de7948 | 1913 | |
1da177e4 | 1914 | sb->s_fs_info = sbi; |
1da177e4 | 1915 | |
1e7933de | 1916 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 1917 | |
6da80894 | 1918 | if (!udf_parse_options((char *)options, &uopt, false)) |
1da177e4 LT |
1919 | goto error_out; |
1920 | ||
1921 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 1922 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
8076c363 | 1923 | udf_err(sb, "utf8 cannot be combined with iocharset\n"); |
1da177e4 LT |
1924 | goto error_out; |
1925 | } | |
1926 | #ifdef CONFIG_UDF_NLS | |
cb00ea35 | 1927 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
1928 | uopt.nls_map = load_nls_default(); |
1929 | if (!uopt.nls_map) | |
1930 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
1931 | else | |
1932 | udf_debug("Using default NLS map\n"); | |
1933 | } | |
1934 | #endif | |
1935 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
1936 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
1937 | ||
1938 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
1939 | fileset.partitionReferenceNum = 0xFFFF; | |
1940 | ||
6c79e987 MS |
1941 | sbi->s_flags = uopt.flags; |
1942 | sbi->s_uid = uopt.uid; | |
1943 | sbi->s_gid = uopt.gid; | |
1944 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
1945 | sbi->s_fmode = uopt.fmode; |
1946 | sbi->s_dmode = uopt.dmode; | |
6c79e987 | 1947 | sbi->s_nls_map = uopt.nls_map; |
c03cad24 | 1948 | rwlock_init(&sbi->s_cred_lock); |
1da177e4 | 1949 | |
cb00ea35 | 1950 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 1951 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 1952 | else |
6c79e987 | 1953 | sbi->s_session = uopt.session; |
1da177e4 | 1954 | |
6c79e987 | 1955 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 1956 | |
40346005 JK |
1957 | /* Fill in the rest of the superblock */ |
1958 | sb->s_op = &udf_sb_ops; | |
1959 | sb->s_export_op = &udf_export_ops; | |
123e9caf | 1960 | |
40346005 JK |
1961 | sb->s_dirt = 0; |
1962 | sb->s_magic = UDF_SUPER_MAGIC; | |
1963 | sb->s_time_gran = 1000; | |
1964 | ||
1197e4df | 1965 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { |
40346005 | 1966 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 1967 | } else { |
e1defc4f | 1968 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); |
40346005 JK |
1969 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1970 | if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { | |
1197e4df | 1971 | if (!silent) |
78ace70c JP |
1972 | pr_notice("Rescanning with blocksize %d\n", |
1973 | UDF_DEFAULT_BLOCKSIZE); | |
1197e4df | 1974 | uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; |
40346005 | 1975 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 1976 | } |
1da177e4 | 1977 | } |
40346005 | 1978 | if (!ret) { |
78ace70c | 1979 | udf_warn(sb, "No partition found (1)\n"); |
1da177e4 LT |
1980 | goto error_out; |
1981 | } | |
1982 | ||
6c79e987 | 1983 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
1da177e4 | 1984 | |
6c79e987 | 1985 | if (sbi->s_lvid_bh) { |
4b11111a MS |
1986 | struct logicalVolIntegrityDescImpUse *lvidiu = |
1987 | udf_sb_lvidiu(sbi); | |
6c79e987 MS |
1988 | uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); |
1989 | uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
4b11111a MS |
1990 | /* uint16_t maxUDFWriteRev = |
1991 | le16_to_cpu(lvidiu->maxUDFWriteRev); */ | |
1da177e4 | 1992 | |
cb00ea35 | 1993 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
78ace70c JP |
1994 | udf_err(sb, "minUDFReadRev=%x (max is %x)\n", |
1995 | le16_to_cpu(lvidiu->minUDFReadRev), | |
1996 | UDF_MAX_READ_VERSION); | |
1da177e4 | 1997 | goto error_out; |
4b11111a | 1998 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) |
1da177e4 | 1999 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 2000 | |
6c79e987 | 2001 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
2002 | |
2003 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
2004 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
2005 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
2006 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
2007 | } | |
2008 | ||
6c79e987 | 2009 | if (!sbi->s_partitions) { |
78ace70c | 2010 | udf_warn(sb, "No partition found (2)\n"); |
1da177e4 LT |
2011 | goto error_out; |
2012 | } | |
2013 | ||
4b11111a MS |
2014 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
2015 | UDF_PART_FLAG_READ_ONLY) { | |
78ace70c | 2016 | pr_notice("Partition marked readonly; forcing readonly mount\n"); |
39b3f6d6 | 2017 | sb->s_flags |= MS_RDONLY; |
c1a26e7d | 2018 | } |
39b3f6d6 | 2019 | |
cb00ea35 | 2020 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
78ace70c | 2021 | udf_warn(sb, "No fileset found\n"); |
1da177e4 LT |
2022 | goto error_out; |
2023 | } | |
2024 | ||
cb00ea35 | 2025 | if (!silent) { |
5ca4e4be | 2026 | struct timestamp ts; |
56774805 | 2027 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); |
78ace70c JP |
2028 | udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
2029 | sbi->s_volume_ident, | |
2030 | le16_to_cpu(ts.year), ts.month, ts.day, | |
56774805 | 2031 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); |
1da177e4 LT |
2032 | } |
2033 | if (!(sb->s_flags & MS_RDONLY)) | |
2034 | udf_open_lvid(sb); | |
2035 | ||
2036 | /* Assign the root inode */ | |
2037 | /* assign inodes by physical block number */ | |
2038 | /* perhaps it's not extensible enough, but for now ... */ | |
97e961fd | 2039 | inode = udf_iget(sb, &rootdir); |
cb00ea35 | 2040 | if (!inode) { |
78ace70c | 2041 | udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n", |
cb00ea35 | 2042 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
1da177e4 LT |
2043 | goto error_out; |
2044 | } | |
2045 | ||
2046 | /* Allocate a dentry for the root inode */ | |
2047 | sb->s_root = d_alloc_root(inode); | |
cb00ea35 | 2048 | if (!sb->s_root) { |
78ace70c | 2049 | udf_err(sb, "Couldn't allocate root dentry\n"); |
1da177e4 LT |
2050 | iput(inode); |
2051 | goto error_out; | |
2052 | } | |
31170b6a | 2053 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
1da177e4 LT |
2054 | return 0; |
2055 | ||
28de7948 | 2056 | error_out: |
6c79e987 MS |
2057 | if (sbi->s_vat_inode) |
2058 | iput(sbi->s_vat_inode); | |
2e0838fd JK |
2059 | if (sbi->s_partitions) |
2060 | for (i = 0; i < sbi->s_partitions; i++) | |
2061 | udf_free_partition(&sbi->s_partmaps[i]); | |
1da177e4 LT |
2062 | #ifdef CONFIG_UDF_NLS |
2063 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2064 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2065 | #endif |
2066 | if (!(sb->s_flags & MS_RDONLY)) | |
2067 | udf_close_lvid(sb); | |
6c79e987 MS |
2068 | brelse(sbi->s_lvid_bh); |
2069 | ||
2070 | kfree(sbi->s_partmaps); | |
1da177e4 LT |
2071 | kfree(sbi); |
2072 | sb->s_fs_info = NULL; | |
28de7948 | 2073 | |
1da177e4 LT |
2074 | return -EINVAL; |
2075 | } | |
2076 | ||
8076c363 JP |
2077 | void _udf_err(struct super_block *sb, const char *function, |
2078 | const char *fmt, ...) | |
1da177e4 LT |
2079 | { |
2080 | va_list args; | |
2081 | ||
cb00ea35 | 2082 | if (!(sb->s_flags & MS_RDONLY)) { |
1da177e4 LT |
2083 | /* mark sb error */ |
2084 | sb->s_dirt = 1; | |
2085 | } | |
2086 | va_start(args, fmt); | |
4a6e617a | 2087 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 | 2088 | va_end(args); |
78ace70c | 2089 | pr_crit("error (device %s): %s: %s", |
8076c363 | 2090 | sb->s_id, function, error_buf); |
1da177e4 LT |
2091 | } |
2092 | ||
a40ecd7b JP |
2093 | void _udf_warn(struct super_block *sb, const char *function, |
2094 | const char *fmt, ...) | |
1da177e4 LT |
2095 | { |
2096 | va_list args; | |
2097 | ||
cb00ea35 | 2098 | va_start(args, fmt); |
4a6e617a | 2099 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 | 2100 | va_end(args); |
78ace70c | 2101 | pr_warn("warning (device %s): %s: %s", |
cb00ea35 | 2102 | sb->s_id, function, error_buf); |
1da177e4 LT |
2103 | } |
2104 | ||
cb00ea35 | 2105 | static void udf_put_super(struct super_block *sb) |
1da177e4 LT |
2106 | { |
2107 | int i; | |
6c79e987 | 2108 | struct udf_sb_info *sbi; |
1da177e4 | 2109 | |
6c79e987 | 2110 | sbi = UDF_SB(sb); |
6cfd0148 | 2111 | |
6c79e987 MS |
2112 | if (sbi->s_vat_inode) |
2113 | iput(sbi->s_vat_inode); | |
2e0838fd JK |
2114 | if (sbi->s_partitions) |
2115 | for (i = 0; i < sbi->s_partitions; i++) | |
2116 | udf_free_partition(&sbi->s_partmaps[i]); | |
1da177e4 LT |
2117 | #ifdef CONFIG_UDF_NLS |
2118 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2119 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2120 | #endif |
2121 | if (!(sb->s_flags & MS_RDONLY)) | |
2122 | udf_close_lvid(sb); | |
6c79e987 MS |
2123 | brelse(sbi->s_lvid_bh); |
2124 | kfree(sbi->s_partmaps); | |
1da177e4 LT |
2125 | kfree(sb->s_fs_info); |
2126 | sb->s_fs_info = NULL; | |
2127 | } | |
2128 | ||
146bca72 JK |
2129 | static int udf_sync_fs(struct super_block *sb, int wait) |
2130 | { | |
2131 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2132 | ||
2133 | mutex_lock(&sbi->s_alloc_mutex); | |
2134 | if (sbi->s_lvid_dirty) { | |
2135 | /* | |
2136 | * Blockdevice will be synced later so we don't have to submit | |
2137 | * the buffer for IO | |
2138 | */ | |
2139 | mark_buffer_dirty(sbi->s_lvid_bh); | |
2140 | sb->s_dirt = 0; | |
2141 | sbi->s_lvid_dirty = 0; | |
2142 | } | |
2143 | mutex_unlock(&sbi->s_alloc_mutex); | |
2144 | ||
2145 | return 0; | |
2146 | } | |
2147 | ||
cb00ea35 | 2148 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2149 | { |
726c3342 | 2150 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
2151 | struct udf_sb_info *sbi = UDF_SB(sb); |
2152 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
557f5a14 | 2153 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
6c79e987 MS |
2154 | |
2155 | if (sbi->s_lvid_bh != NULL) | |
2156 | lvidiu = udf_sb_lvidiu(sbi); | |
2157 | else | |
2158 | lvidiu = NULL; | |
726c3342 | 2159 | |
1da177e4 LT |
2160 | buf->f_type = UDF_SUPER_MAGIC; |
2161 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 2162 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
2163 | buf->f_bfree = udf_count_free(sb); |
2164 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
2165 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
2166 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
2167 | + buf->f_bfree; | |
1da177e4 | 2168 | buf->f_ffree = buf->f_bfree; |
cb00ea35 | 2169 | buf->f_namelen = UDF_NAME_LEN - 2; |
557f5a14 CL |
2170 | buf->f_fsid.val[0] = (u32)id; |
2171 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
2172 | |
2173 | return 0; | |
2174 | } | |
2175 | ||
4b11111a MS |
2176 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
2177 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
2178 | { |
2179 | struct buffer_head *bh = NULL; | |
2180 | unsigned int accum = 0; | |
2181 | int index; | |
2182 | int block = 0, newblock; | |
5ca4e4be | 2183 | struct kernel_lb_addr loc; |
1da177e4 | 2184 | uint32_t bytes; |
1da177e4 LT |
2185 | uint8_t *ptr; |
2186 | uint16_t ident; | |
2187 | struct spaceBitmapDesc *bm; | |
2188 | ||
1da177e4 | 2189 | loc.logicalBlockNum = bitmap->s_extPosition; |
6c79e987 | 2190 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
97e961fd | 2191 | bh = udf_read_ptagged(sb, &loc, 0, &ident); |
1da177e4 | 2192 | |
cb00ea35 | 2193 | if (!bh) { |
78ace70c | 2194 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 | 2195 | goto out; |
cb00ea35 | 2196 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 2197 | brelse(bh); |
78ace70c | 2198 | udf_err(sb, "udf_count_free failed\n"); |
1da177e4 LT |
2199 | goto out; |
2200 | } | |
2201 | ||
2202 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2203 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
2204 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
2205 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 2206 | |
cb00ea35 | 2207 | while (bytes > 0) { |
01b954a3 MS |
2208 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
2209 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2210 | cur_bytes * 8); | |
2211 | bytes -= cur_bytes; | |
cb00ea35 | 2212 | if (bytes) { |
3bf25cb4 | 2213 | brelse(bh); |
97e961fd | 2214 | newblock = udf_get_lb_pblock(sb, &loc, ++block); |
1da177e4 | 2215 | bh = udf_tread(sb, newblock); |
cb00ea35 | 2216 | if (!bh) { |
1da177e4 LT |
2217 | udf_debug("read failed\n"); |
2218 | goto out; | |
2219 | } | |
2220 | index = 0; | |
28de7948 | 2221 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2222 | } |
2223 | } | |
3bf25cb4 | 2224 | brelse(bh); |
28de7948 | 2225 | out: |
1da177e4 LT |
2226 | return accum; |
2227 | } | |
2228 | ||
4b11111a MS |
2229 | static unsigned int udf_count_free_table(struct super_block *sb, |
2230 | struct inode *table) | |
1da177e4 LT |
2231 | { |
2232 | unsigned int accum = 0; | |
ff116fc8 | 2233 | uint32_t elen; |
5ca4e4be | 2234 | struct kernel_lb_addr eloc; |
1da177e4 | 2235 | int8_t etype; |
ff116fc8 | 2236 | struct extent_position epos; |
1da177e4 | 2237 | |
d1668fe3 | 2238 | mutex_lock(&UDF_SB(sb)->s_alloc_mutex); |
c0b34438 | 2239 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2240 | epos.offset = sizeof(struct unallocSpaceEntry); |
2241 | epos.bh = NULL; | |
1da177e4 | 2242 | |
3a71fc5d | 2243 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2244 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2245 | |
3bf25cb4 | 2246 | brelse(epos.bh); |
d1668fe3 | 2247 | mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); |
1da177e4 LT |
2248 | |
2249 | return accum; | |
2250 | } | |
cb00ea35 CG |
2251 | |
2252 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2253 | { |
2254 | unsigned int accum = 0; | |
6c79e987 MS |
2255 | struct udf_sb_info *sbi; |
2256 | struct udf_part_map *map; | |
1da177e4 | 2257 | |
6c79e987 MS |
2258 | sbi = UDF_SB(sb); |
2259 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2260 | struct logicalVolIntegrityDesc *lvid = |
2261 | (struct logicalVolIntegrityDesc *) | |
2262 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2263 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2264 | accum = le32_to_cpu( |
2265 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2266 | if (accum == 0xFFFFFFFF) |
2267 | accum = 0; | |
2268 | } | |
2269 | } | |
2270 | ||
2271 | if (accum) | |
2272 | return accum; | |
2273 | ||
6c79e987 MS |
2274 | map = &sbi->s_partmaps[sbi->s_partition]; |
2275 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2276 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2277 | map->s_uspace.s_bitmap); |
1da177e4 | 2278 | } |
6c79e987 | 2279 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
28de7948 | 2280 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2281 | map->s_fspace.s_bitmap); |
1da177e4 LT |
2282 | } |
2283 | if (accum) | |
2284 | return accum; | |
2285 | ||
6c79e987 | 2286 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2287 | accum += udf_count_free_table(sb, |
6c79e987 | 2288 | map->s_uspace.s_table); |
1da177e4 | 2289 | } |
6c79e987 | 2290 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
28de7948 | 2291 | accum += udf_count_free_table(sb, |
6c79e987 | 2292 | map->s_fspace.s_table); |
1da177e4 LT |
2293 | } |
2294 | ||
2295 | return accum; | |
2296 | } |