]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * super.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Super block routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
7 | * DESCRIPTION | |
8 | * OSTA-UDF(tm) = Optical Storage Technology Association | |
9 | * Universal Disk Format. | |
10 | * | |
11 | * This code is based on version 2.00 of the UDF specification, | |
12 | * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346]. | |
13 | * http://www.osta.org/ | |
14 | * http://www.ecma.ch/ | |
15 | * http://www.iso.org/ | |
16 | * | |
1da177e4 LT |
17 | * COPYRIGHT |
18 | * This file is distributed under the terms of the GNU General Public | |
19 | * License (GPL). Copies of the GPL can be obtained from: | |
20 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
21 | * Each contributing author retains all rights to their own work. | |
22 | * | |
23 | * (C) 1998 Dave Boynton | |
24 | * (C) 1998-2004 Ben Fennema | |
25 | * (C) 2000 Stelias Computing Inc | |
26 | * | |
27 | * HISTORY | |
28 | * | |
29 | * 09/24/98 dgb changed to allow compiling outside of kernel, and | |
30 | * added some debugging. | |
31 | * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34 | |
32 | * 10/16/98 attempting some multi-session support | |
33 | * 10/17/98 added freespace count for "df" | |
34 | * 11/11/98 gr added novrs option | |
35 | * 11/26/98 dgb added fileset,anchor mount options | |
3a71fc5d MS |
36 | * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced |
37 | * vol descs. rewrote option handling based on isofs | |
1da177e4 LT |
38 | * 12/20/98 find the free space bitmap (if it exists) |
39 | */ | |
40 | ||
cb00ea35 | 41 | #include "udfdecl.h" |
1da177e4 | 42 | |
1da177e4 LT |
43 | #include <linux/blkdev.h> |
44 | #include <linux/slab.h> | |
45 | #include <linux/kernel.h> | |
46 | #include <linux/module.h> | |
47 | #include <linux/parser.h> | |
48 | #include <linux/stat.h> | |
49 | #include <linux/cdrom.h> | |
50 | #include <linux/nls.h> | |
51 | #include <linux/smp_lock.h> | |
52 | #include <linux/buffer_head.h> | |
53 | #include <linux/vfs.h> | |
54 | #include <linux/vmalloc.h> | |
dc5d39be | 55 | #include <linux/errno.h> |
6da80894 | 56 | #include <linux/mount.h> |
c79d967d | 57 | #include <linux/quotaops.h> |
6da80894 | 58 | #include <linux/seq_file.h> |
01b954a3 | 59 | #include <linux/bitmap.h> |
f845fced | 60 | #include <linux/crc-itu-t.h> |
1da177e4 LT |
61 | #include <asm/byteorder.h> |
62 | ||
1da177e4 LT |
63 | #include "udf_sb.h" |
64 | #include "udf_i.h" | |
65 | ||
66 | #include <linux/init.h> | |
67 | #include <asm/uaccess.h> | |
68 | ||
69 | #define VDS_POS_PRIMARY_VOL_DESC 0 | |
70 | #define VDS_POS_UNALLOC_SPACE_DESC 1 | |
71 | #define VDS_POS_LOGICAL_VOL_DESC 2 | |
72 | #define VDS_POS_PARTITION_DESC 3 | |
73 | #define VDS_POS_IMP_USE_VOL_DESC 4 | |
74 | #define VDS_POS_VOL_DESC_PTR 5 | |
75 | #define VDS_POS_TERMINATING_DESC 6 | |
76 | #define VDS_POS_LENGTH 7 | |
77 | ||
6da80894 MS |
78 | #define UDF_DEFAULT_BLOCKSIZE 2048 |
79 | ||
1da177e4 LT |
80 | static char error_buf[1024]; |
81 | ||
82 | /* These are the "meat" - everything else is stuffing */ | |
83 | static int udf_fill_super(struct super_block *, void *, int); | |
84 | static void udf_put_super(struct super_block *); | |
146bca72 | 85 | static int udf_sync_fs(struct super_block *, int); |
1da177e4 | 86 | static int udf_remount_fs(struct super_block *, int *, char *); |
5ca4e4be | 87 | static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); |
5ca4e4be PE |
88 | static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, |
89 | struct kernel_lb_addr *); | |
cb00ea35 | 90 | static void udf_load_fileset(struct super_block *, struct buffer_head *, |
5ca4e4be | 91 | struct kernel_lb_addr *); |
1da177e4 LT |
92 | static void udf_open_lvid(struct super_block *); |
93 | static void udf_close_lvid(struct super_block *); | |
94 | static unsigned int udf_count_free(struct super_block *); | |
726c3342 | 95 | static int udf_statfs(struct dentry *, struct kstatfs *); |
6da80894 | 96 | static int udf_show_options(struct seq_file *, struct vfsmount *); |
b8145a76 AB |
97 | static void udf_error(struct super_block *sb, const char *function, |
98 | const char *fmt, ...); | |
1da177e4 | 99 | |
6c79e987 MS |
100 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) |
101 | { | |
4b11111a MS |
102 | struct logicalVolIntegrityDesc *lvid = |
103 | (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; | |
6c79e987 | 104 | __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); |
4b11111a MS |
105 | __u32 offset = number_of_partitions * 2 * |
106 | sizeof(uint32_t)/sizeof(uint8_t); | |
6c79e987 MS |
107 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
108 | } | |
109 | ||
1da177e4 | 110 | /* UDF filesystem type */ |
454e2398 | 111 | static int udf_get_sb(struct file_system_type *fs_type, |
cb00ea35 CG |
112 | int flags, const char *dev_name, void *data, |
113 | struct vfsmount *mnt) | |
1da177e4 | 114 | { |
454e2398 | 115 | return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt); |
1da177e4 LT |
116 | } |
117 | ||
118 | static struct file_system_type udf_fstype = { | |
28de7948 CG |
119 | .owner = THIS_MODULE, |
120 | .name = "udf", | |
121 | .get_sb = udf_get_sb, | |
122 | .kill_sb = kill_block_super, | |
123 | .fs_flags = FS_REQUIRES_DEV, | |
1da177e4 LT |
124 | }; |
125 | ||
cb00ea35 | 126 | static struct kmem_cache *udf_inode_cachep; |
1da177e4 LT |
127 | |
128 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
129 | { | |
130 | struct udf_inode_info *ei; | |
3a71fc5d | 131 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
132 | if (!ei) |
133 | return NULL; | |
95f8797f DB |
134 | |
135 | ei->i_unique = 0; | |
136 | ei->i_lenExtents = 0; | |
137 | ei->i_next_alloc_block = 0; | |
138 | ei->i_next_alloc_goal = 0; | |
139 | ei->i_strat4096 = 0; | |
140 | ||
1da177e4 LT |
141 | return &ei->vfs_inode; |
142 | } | |
143 | ||
144 | static void udf_destroy_inode(struct inode *inode) | |
145 | { | |
146 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); | |
147 | } | |
148 | ||
51cc5068 | 149 | static void init_once(void *foo) |
1da177e4 | 150 | { |
cb00ea35 | 151 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 152 | |
a35afb83 CL |
153 | ei->i_ext.i_data = NULL; |
154 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
155 | } |
156 | ||
157 | static int init_inodecache(void) | |
158 | { | |
159 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
160 | sizeof(struct udf_inode_info), | |
cb00ea35 CG |
161 | 0, (SLAB_RECLAIM_ACCOUNT | |
162 | SLAB_MEM_SPREAD), | |
20c2df83 | 163 | init_once); |
28de7948 | 164 | if (!udf_inode_cachep) |
1da177e4 LT |
165 | return -ENOMEM; |
166 | return 0; | |
167 | } | |
168 | ||
169 | static void destroy_inodecache(void) | |
170 | { | |
1a1d92c1 | 171 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
172 | } |
173 | ||
174 | /* Superblock operations */ | |
ee9b6d61 | 175 | static const struct super_operations udf_sb_ops = { |
28de7948 CG |
176 | .alloc_inode = udf_alloc_inode, |
177 | .destroy_inode = udf_destroy_inode, | |
178 | .write_inode = udf_write_inode, | |
179 | .delete_inode = udf_delete_inode, | |
180 | .clear_inode = udf_clear_inode, | |
181 | .put_super = udf_put_super, | |
146bca72 | 182 | .sync_fs = udf_sync_fs, |
28de7948 CG |
183 | .statfs = udf_statfs, |
184 | .remount_fs = udf_remount_fs, | |
6da80894 | 185 | .show_options = udf_show_options, |
1da177e4 LT |
186 | }; |
187 | ||
cb00ea35 | 188 | struct udf_options { |
1da177e4 LT |
189 | unsigned char novrs; |
190 | unsigned int blocksize; | |
191 | unsigned int session; | |
192 | unsigned int lastblock; | |
193 | unsigned int anchor; | |
194 | unsigned int volume; | |
195 | unsigned short partition; | |
196 | unsigned int fileset; | |
197 | unsigned int rootdir; | |
198 | unsigned int flags; | |
199 | mode_t umask; | |
200 | gid_t gid; | |
201 | uid_t uid; | |
7ac9bcd5 MS |
202 | mode_t fmode; |
203 | mode_t dmode; | |
1da177e4 LT |
204 | struct nls_table *nls_map; |
205 | }; | |
206 | ||
207 | static int __init init_udf_fs(void) | |
208 | { | |
209 | int err; | |
28de7948 | 210 | |
1da177e4 LT |
211 | err = init_inodecache(); |
212 | if (err) | |
213 | goto out1; | |
214 | err = register_filesystem(&udf_fstype); | |
215 | if (err) | |
216 | goto out; | |
28de7948 | 217 | |
1da177e4 | 218 | return 0; |
28de7948 CG |
219 | |
220 | out: | |
1da177e4 | 221 | destroy_inodecache(); |
28de7948 CG |
222 | |
223 | out1: | |
1da177e4 LT |
224 | return err; |
225 | } | |
226 | ||
227 | static void __exit exit_udf_fs(void) | |
228 | { | |
229 | unregister_filesystem(&udf_fstype); | |
230 | destroy_inodecache(); | |
231 | } | |
232 | ||
233 | module_init(init_udf_fs) | |
28de7948 | 234 | module_exit(exit_udf_fs) |
1da177e4 | 235 | |
dc5d39be MS |
236 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
237 | { | |
238 | struct udf_sb_info *sbi = UDF_SB(sb); | |
239 | ||
240 | sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), | |
241 | GFP_KERNEL); | |
242 | if (!sbi->s_partmaps) { | |
8e24eea7 | 243 | udf_error(sb, __func__, |
dc5d39be MS |
244 | "Unable to allocate space for %d partition maps", |
245 | count); | |
246 | sbi->s_partitions = 0; | |
247 | return -ENOMEM; | |
248 | } | |
249 | ||
250 | sbi->s_partitions = count; | |
251 | return 0; | |
252 | } | |
253 | ||
6da80894 MS |
254 | static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt) |
255 | { | |
256 | struct super_block *sb = mnt->mnt_sb; | |
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) | |
284 | seq_printf(seq, ",umask=%o", sbi->s_umask); | |
87bc730c | 285 | if (sbi->s_fmode != UDF_INVALID_MODE) |
7ac9bcd5 | 286 | seq_printf(seq, ",mode=%o", sbi->s_fmode); |
87bc730c | 287 | if (sbi->s_dmode != UDF_INVALID_MODE) |
7ac9bcd5 | 288 | seq_printf(seq, ",dmode=%o", 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 CG |
548 | default: |
549 | printk(KERN_ERR "udf: bad mount option \"%s\" " | |
550 | "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 | ||
337eb00a | 573 | lock_kernel(); |
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; | |
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 | ||
590 | if (*flags & MS_RDONLY) { | |
1da177e4 | 591 | udf_close_lvid(sb); |
c79d967d | 592 | |
0f0dd62f | 593 | error = dquot_suspend(sb, -1); |
c79d967d | 594 | } else { |
1da177e4 LT |
595 | udf_open_lvid(sb); |
596 | ||
c79d967d CH |
597 | /* mark the fs r/w for quota activity */ |
598 | sb->s_flags &= ~MS_RDONLY; | |
0f0dd62f | 599 | dquot_resume(sb, -1); |
c79d967d CH |
600 | } |
601 | ||
602 | out_unlock: | |
337eb00a | 603 | unlock_kernel(); |
c79d967d | 604 | return error; |
1da177e4 LT |
605 | } |
606 | ||
40346005 JK |
607 | /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ |
608 | /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
609 | static loff_t udf_check_vsd(struct super_block *sb) | |
1da177e4 LT |
610 | { |
611 | struct volStructDesc *vsd = NULL; | |
f4bcbbd9 | 612 | loff_t sector = 32768; |
1da177e4 LT |
613 | int sectorsize; |
614 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
615 | int nsr02 = 0; |
616 | int nsr03 = 0; | |
6c79e987 | 617 | struct udf_sb_info *sbi; |
1da177e4 | 618 | |
6c79e987 | 619 | sbi = UDF_SB(sb); |
1da177e4 LT |
620 | if (sb->s_blocksize < sizeof(struct volStructDesc)) |
621 | sectorsize = sizeof(struct volStructDesc); | |
622 | else | |
623 | sectorsize = sb->s_blocksize; | |
624 | ||
6c79e987 | 625 | sector += (sbi->s_session << sb->s_blocksize_bits); |
1da177e4 LT |
626 | |
627 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
706047a7 SM |
628 | (unsigned int)(sector >> sb->s_blocksize_bits), |
629 | sb->s_blocksize); | |
1da177e4 | 630 | /* Process the sequence (if applicable) */ |
cb00ea35 | 631 | for (; !nsr02 && !nsr03; sector += sectorsize) { |
1da177e4 LT |
632 | /* Read a block */ |
633 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
634 | if (!bh) | |
635 | break; | |
636 | ||
637 | /* Look for ISO descriptors */ | |
638 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 639 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 640 | |
cb00ea35 | 641 | if (vsd->stdIdent[0] == 0) { |
3bf25cb4 | 642 | brelse(bh); |
1da177e4 | 643 | break; |
3a71fc5d MS |
644 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
645 | VSD_STD_ID_LEN)) { | |
cb00ea35 CG |
646 | switch (vsd->structType) { |
647 | case 0: | |
648 | udf_debug("ISO9660 Boot Record found\n"); | |
649 | break; | |
650 | case 1: | |
3a71fc5d MS |
651 | udf_debug("ISO9660 Primary Volume Descriptor " |
652 | "found\n"); | |
cb00ea35 CG |
653 | break; |
654 | case 2: | |
3a71fc5d MS |
655 | udf_debug("ISO9660 Supplementary Volume " |
656 | "Descriptor found\n"); | |
cb00ea35 CG |
657 | break; |
658 | case 3: | |
3a71fc5d MS |
659 | udf_debug("ISO9660 Volume Partition Descriptor " |
660 | "found\n"); | |
cb00ea35 CG |
661 | break; |
662 | case 255: | |
3a71fc5d MS |
663 | udf_debug("ISO9660 Volume Descriptor Set " |
664 | "Terminator found\n"); | |
cb00ea35 CG |
665 | break; |
666 | default: | |
667 | udf_debug("ISO9660 VRS (%u) found\n", | |
668 | vsd->structType); | |
669 | break; | |
1da177e4 | 670 | } |
3a71fc5d MS |
671 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
672 | VSD_STD_ID_LEN)) | |
673 | ; /* nothing */ | |
674 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
675 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 676 | brelse(bh); |
1da177e4 | 677 | break; |
3a71fc5d MS |
678 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
679 | VSD_STD_ID_LEN)) | |
1da177e4 | 680 | nsr02 = sector; |
3a71fc5d MS |
681 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
682 | VSD_STD_ID_LEN)) | |
1da177e4 | 683 | nsr03 = sector; |
3bf25cb4 | 684 | brelse(bh); |
1da177e4 LT |
685 | } |
686 | ||
687 | if (nsr03) | |
688 | return nsr03; | |
689 | else if (nsr02) | |
690 | return nsr02; | |
6c79e987 | 691 | else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) |
1da177e4 LT |
692 | return -1; |
693 | else | |
694 | return 0; | |
695 | } | |
696 | ||
3a71fc5d | 697 | static int udf_find_fileset(struct super_block *sb, |
5ca4e4be PE |
698 | struct kernel_lb_addr *fileset, |
699 | struct kernel_lb_addr *root) | |
1da177e4 LT |
700 | { |
701 | struct buffer_head *bh = NULL; | |
702 | long lastblock; | |
703 | uint16_t ident; | |
6c79e987 | 704 | struct udf_sb_info *sbi; |
1da177e4 LT |
705 | |
706 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 707 | fileset->partitionReferenceNum != 0xFFFF) { |
97e961fd | 708 | bh = udf_read_ptagged(sb, fileset, 0, &ident); |
1da177e4 | 709 | |
28de7948 | 710 | if (!bh) { |
1da177e4 | 711 | return 1; |
28de7948 | 712 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 713 | brelse(bh); |
1da177e4 LT |
714 | return 1; |
715 | } | |
cb00ea35 | 716 | |
1da177e4 LT |
717 | } |
718 | ||
6c79e987 | 719 | sbi = UDF_SB(sb); |
3a71fc5d MS |
720 | if (!bh) { |
721 | /* Search backwards through the partitions */ | |
5ca4e4be | 722 | struct kernel_lb_addr newfileset; |
1da177e4 | 723 | |
28de7948 | 724 | /* --> cvg: FIXME - is it reasonable? */ |
1da177e4 | 725 | return 1; |
cb00ea35 | 726 | |
6c79e987 | 727 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
cb00ea35 CG |
728 | (newfileset.partitionReferenceNum != 0xFFFF && |
729 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
730 | fileset->partitionReferenceNum == 0xFFFF); | |
731 | newfileset.partitionReferenceNum--) { | |
6c79e987 MS |
732 | lastblock = sbi->s_partmaps |
733 | [newfileset.partitionReferenceNum] | |
734 | .s_partition_len; | |
1da177e4 LT |
735 | newfileset.logicalBlockNum = 0; |
736 | ||
cb00ea35 | 737 | do { |
97e961fd | 738 | bh = udf_read_ptagged(sb, &newfileset, 0, |
3a71fc5d | 739 | &ident); |
cb00ea35 CG |
740 | if (!bh) { |
741 | newfileset.logicalBlockNum++; | |
1da177e4 LT |
742 | continue; |
743 | } | |
744 | ||
cb00ea35 CG |
745 | switch (ident) { |
746 | case TAG_IDENT_SBD: | |
28de7948 CG |
747 | { |
748 | struct spaceBitmapDesc *sp; | |
4b11111a MS |
749 | sp = (struct spaceBitmapDesc *) |
750 | bh->b_data; | |
28de7948 CG |
751 | newfileset.logicalBlockNum += 1 + |
752 | ((le32_to_cpu(sp->numOfBytes) + | |
4b11111a MS |
753 | sizeof(struct spaceBitmapDesc) |
754 | - 1) >> sb->s_blocksize_bits); | |
28de7948 CG |
755 | brelse(bh); |
756 | break; | |
757 | } | |
cb00ea35 | 758 | case TAG_IDENT_FSD: |
28de7948 CG |
759 | *fileset = newfileset; |
760 | break; | |
cb00ea35 | 761 | default: |
28de7948 CG |
762 | newfileset.logicalBlockNum++; |
763 | brelse(bh); | |
764 | bh = NULL; | |
765 | break; | |
1da177e4 | 766 | } |
28de7948 CG |
767 | } while (newfileset.logicalBlockNum < lastblock && |
768 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
769 | fileset->partitionReferenceNum == 0xFFFF); | |
1da177e4 LT |
770 | } |
771 | } | |
772 | ||
773 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 774 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
1da177e4 | 775 | udf_debug("Fileset at block=%d, partition=%d\n", |
cb00ea35 CG |
776 | fileset->logicalBlockNum, |
777 | fileset->partitionReferenceNum); | |
1da177e4 | 778 | |
6c79e987 | 779 | sbi->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 780 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 781 | brelse(bh); |
1da177e4 LT |
782 | return 0; |
783 | } | |
784 | return 1; | |
785 | } | |
786 | ||
c0eb31ed | 787 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
788 | { |
789 | struct primaryVolDesc *pvoldesc; | |
ba9aadd8 | 790 | struct ustr *instr, *outstr; |
c0eb31ed JK |
791 | struct buffer_head *bh; |
792 | uint16_t ident; | |
ba9aadd8 MS |
793 | int ret = 1; |
794 | ||
795 | instr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
796 | if (!instr) | |
797 | return 1; | |
798 | ||
799 | outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); | |
800 | if (!outstr) | |
801 | goto out1; | |
c0eb31ed JK |
802 | |
803 | bh = udf_read_tagged(sb, block, block, &ident); | |
804 | if (!bh) | |
ba9aadd8 MS |
805 | goto out2; |
806 | ||
c0eb31ed | 807 | BUG_ON(ident != TAG_IDENT_PVD); |
1da177e4 LT |
808 | |
809 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
810 | ||
56774805 MS |
811 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
812 | pvoldesc->recordingDateAndTime)) { | |
af15a298 | 813 | #ifdef UDFFS_DEBUG |
5ca4e4be | 814 | struct timestamp *ts = &pvoldesc->recordingDateAndTime; |
cbf5676a | 815 | udf_debug("recording time %04u/%02u/%02u" |
3a71fc5d | 816 | " %02u:%02u (%x)\n", |
af15a298 MS |
817 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, |
818 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
819 | #endif | |
1da177e4 LT |
820 | } |
821 | ||
ba9aadd8 MS |
822 | if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) |
823 | if (udf_CS0toUTF8(outstr, instr)) { | |
824 | strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, | |
825 | outstr->u_len > 31 ? 31 : outstr->u_len); | |
4b11111a MS |
826 | udf_debug("volIdent[] = '%s'\n", |
827 | UDF_SB(sb)->s_volume_ident); | |
1da177e4 | 828 | } |
1da177e4 | 829 | |
ba9aadd8 MS |
830 | if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) |
831 | if (udf_CS0toUTF8(outstr, instr)) | |
832 | udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); | |
c0eb31ed JK |
833 | |
834 | brelse(bh); | |
ba9aadd8 MS |
835 | ret = 0; |
836 | out2: | |
837 | kfree(outstr); | |
838 | out1: | |
839 | kfree(instr); | |
840 | return ret; | |
1da177e4 LT |
841 | } |
842 | ||
bfb257a5 JK |
843 | static int udf_load_metadata_files(struct super_block *sb, int partition) |
844 | { | |
845 | struct udf_sb_info *sbi = UDF_SB(sb); | |
846 | struct udf_part_map *map; | |
847 | struct udf_meta_data *mdata; | |
5ca4e4be | 848 | struct kernel_lb_addr addr; |
bfb257a5 JK |
849 | int fe_error = 0; |
850 | ||
851 | map = &sbi->s_partmaps[partition]; | |
852 | mdata = &map->s_type_specific.s_metadata; | |
853 | ||
854 | /* metadata address */ | |
855 | addr.logicalBlockNum = mdata->s_meta_file_loc; | |
856 | addr.partitionReferenceNum = map->s_partition_num; | |
857 | ||
858 | udf_debug("Metadata file location: block = %d part = %d\n", | |
859 | addr.logicalBlockNum, addr.partitionReferenceNum); | |
860 | ||
97e961fd | 861 | mdata->s_metadata_fe = udf_iget(sb, &addr); |
bfb257a5 JK |
862 | |
863 | if (mdata->s_metadata_fe == NULL) { | |
864 | udf_warning(sb, __func__, "metadata inode efe not found, " | |
865 | "will try mirror inode."); | |
866 | fe_error = 1; | |
867 | } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type != | |
868 | ICBTAG_FLAG_AD_SHORT) { | |
869 | udf_warning(sb, __func__, "metadata inode efe does not have " | |
870 | "short allocation descriptors!"); | |
871 | fe_error = 1; | |
872 | iput(mdata->s_metadata_fe); | |
873 | mdata->s_metadata_fe = NULL; | |
874 | } | |
875 | ||
876 | /* mirror file entry */ | |
877 | addr.logicalBlockNum = mdata->s_mirror_file_loc; | |
878 | addr.partitionReferenceNum = map->s_partition_num; | |
879 | ||
880 | udf_debug("Mirror metadata file location: block = %d part = %d\n", | |
881 | addr.logicalBlockNum, addr.partitionReferenceNum); | |
882 | ||
97e961fd | 883 | mdata->s_mirror_fe = udf_iget(sb, &addr); |
bfb257a5 JK |
884 | |
885 | if (mdata->s_mirror_fe == NULL) { | |
886 | if (fe_error) { | |
887 | udf_error(sb, __func__, "mirror inode efe not found " | |
888 | "and metadata inode is missing too, exiting..."); | |
889 | goto error_exit; | |
890 | } else | |
891 | udf_warning(sb, __func__, "mirror inode efe not found," | |
892 | " but metadata inode is OK"); | |
893 | } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type != | |
894 | ICBTAG_FLAG_AD_SHORT) { | |
895 | udf_warning(sb, __func__, "mirror inode efe does not have " | |
896 | "short allocation descriptors!"); | |
897 | iput(mdata->s_mirror_fe); | |
898 | mdata->s_mirror_fe = NULL; | |
899 | if (fe_error) | |
900 | goto error_exit; | |
901 | } | |
902 | ||
903 | /* | |
904 | * bitmap file entry | |
905 | * Note: | |
906 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) | |
907 | */ | |
908 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { | |
909 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; | |
910 | addr.partitionReferenceNum = map->s_partition_num; | |
911 | ||
912 | udf_debug("Bitmap file location: block = %d part = %d\n", | |
913 | addr.logicalBlockNum, addr.partitionReferenceNum); | |
914 | ||
97e961fd | 915 | mdata->s_bitmap_fe = udf_iget(sb, &addr); |
bfb257a5 JK |
916 | |
917 | if (mdata->s_bitmap_fe == NULL) { | |
918 | if (sb->s_flags & MS_RDONLY) | |
919 | udf_warning(sb, __func__, "bitmap inode efe " | |
920 | "not found but it's ok since the disc" | |
921 | " is mounted read-only"); | |
922 | else { | |
923 | udf_error(sb, __func__, "bitmap inode efe not " | |
924 | "found and attempted read-write mount"); | |
925 | goto error_exit; | |
926 | } | |
927 | } | |
928 | } | |
929 | ||
930 | udf_debug("udf_load_metadata_files Ok\n"); | |
931 | ||
932 | return 0; | |
933 | ||
934 | error_exit: | |
935 | return 1; | |
936 | } | |
937 | ||
28de7948 | 938 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
5ca4e4be | 939 | struct kernel_lb_addr *root) |
1da177e4 LT |
940 | { |
941 | struct fileSetDesc *fset; | |
942 | ||
943 | fset = (struct fileSetDesc *)bh->b_data; | |
944 | ||
945 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
946 | ||
6c79e987 | 947 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 948 | |
cb00ea35 CG |
949 | udf_debug("Rootdir at block=%d, partition=%d\n", |
950 | root->logicalBlockNum, root->partitionReferenceNum); | |
1da177e4 LT |
951 | } |
952 | ||
883cb9d1 MS |
953 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
954 | { | |
955 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
956 | return DIV_ROUND_UP(map->s_partition_len + |
957 | (sizeof(struct spaceBitmapDesc) << 3), | |
958 | sb->s_blocksize * 8); | |
883cb9d1 MS |
959 | } |
960 | ||
66e1da3f MS |
961 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
962 | { | |
66e1da3f MS |
963 | struct udf_bitmap *bitmap; |
964 | int nr_groups; | |
965 | int size; | |
966 | ||
883cb9d1 | 967 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
968 | size = sizeof(struct udf_bitmap) + |
969 | (sizeof(struct buffer_head *) * nr_groups); | |
970 | ||
971 | if (size <= PAGE_SIZE) | |
972 | bitmap = kmalloc(size, GFP_KERNEL); | |
973 | else | |
974 | bitmap = vmalloc(size); /* TODO: get rid of vmalloc */ | |
975 | ||
976 | if (bitmap == NULL) { | |
8e24eea7 | 977 | udf_error(sb, __func__, |
66e1da3f MS |
978 | "Unable to allocate space for bitmap " |
979 | "and %d buffer_head pointers", nr_groups); | |
980 | return NULL; | |
981 | } | |
982 | ||
983 | memset(bitmap, 0x00, size); | |
984 | bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); | |
985 | bitmap->s_nr_groups = nr_groups; | |
986 | return bitmap; | |
987 | } | |
988 | ||
3fb38dfa JK |
989 | static int udf_fill_partdesc_info(struct super_block *sb, |
990 | struct partitionDesc *p, int p_index) | |
1da177e4 | 991 | { |
6c79e987 | 992 | struct udf_part_map *map; |
165923fa | 993 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 994 | struct partitionHeaderDesc *phd; |
165923fa | 995 | |
3fb38dfa | 996 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
997 | |
998 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
999 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
1000 | ||
1001 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
1002 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
1003 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
1004 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
1005 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
1006 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
1007 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
1008 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
1009 | ||
706047a7 SM |
1010 | udf_debug("Partition (%d type %x) starts at physical %d, " |
1011 | "block length %d\n", p_index, | |
165923fa MS |
1012 | map->s_partition_type, map->s_partition_root, |
1013 | map->s_partition_len); | |
1014 | ||
1015 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
1016 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
3fb38dfa | 1017 | return 0; |
165923fa MS |
1018 | |
1019 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1020 | if (phd->unallocSpaceTable.extLength) { | |
5ca4e4be | 1021 | struct kernel_lb_addr loc = { |
165923fa MS |
1022 | .logicalBlockNum = le32_to_cpu( |
1023 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 1024 | .partitionReferenceNum = p_index, |
165923fa MS |
1025 | }; |
1026 | ||
97e961fd | 1027 | map->s_uspace.s_table = udf_iget(sb, &loc); |
165923fa MS |
1028 | if (!map->s_uspace.s_table) { |
1029 | udf_debug("cannot load unallocSpaceTable (part %d)\n", | |
3fb38dfa JK |
1030 | p_index); |
1031 | return 1; | |
165923fa MS |
1032 | } |
1033 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; | |
1034 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", | |
3fb38dfa | 1035 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1036 | } |
1037 | ||
1038 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1039 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1040 | if (!bitmap) | |
1041 | return 1; | |
165923fa | 1042 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1043 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1044 | phd->unallocSpaceBitmap.extLength); |
2e0838fd | 1045 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1046 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1047 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
3fb38dfa | 1048 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index, |
2e0838fd | 1049 | bitmap->s_extPosition); |
165923fa MS |
1050 | } |
1051 | ||
1052 | if (phd->partitionIntegrityTable.extLength) | |
3fb38dfa | 1053 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); |
165923fa MS |
1054 | |
1055 | if (phd->freedSpaceTable.extLength) { | |
5ca4e4be | 1056 | struct kernel_lb_addr loc = { |
165923fa MS |
1057 | .logicalBlockNum = le32_to_cpu( |
1058 | phd->freedSpaceTable.extPosition), | |
3fb38dfa | 1059 | .partitionReferenceNum = p_index, |
165923fa MS |
1060 | }; |
1061 | ||
97e961fd | 1062 | map->s_fspace.s_table = udf_iget(sb, &loc); |
165923fa | 1063 | if (!map->s_fspace.s_table) { |
3fb38dfa JK |
1064 | udf_debug("cannot load freedSpaceTable (part %d)\n", |
1065 | p_index); | |
1066 | return 1; | |
165923fa MS |
1067 | } |
1068 | ||
1069 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; | |
1070 | udf_debug("freedSpaceTable (part %d) @ %ld\n", | |
3fb38dfa | 1071 | p_index, map->s_fspace.s_table->i_ino); |
165923fa MS |
1072 | } |
1073 | ||
1074 | if (phd->freedSpaceBitmap.extLength) { | |
3fb38dfa JK |
1075 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1076 | if (!bitmap) | |
1077 | return 1; | |
165923fa | 1078 | map->s_fspace.s_bitmap = bitmap; |
2e0838fd | 1079 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1080 | phd->freedSpaceBitmap.extLength); |
2e0838fd | 1081 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1082 | phd->freedSpaceBitmap.extPosition); |
2e0838fd | 1083 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
3fb38dfa | 1084 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index, |
2e0838fd | 1085 | bitmap->s_extPosition); |
165923fa | 1086 | } |
3fb38dfa JK |
1087 | return 0; |
1088 | } | |
1089 | ||
e971b0b9 JK |
1090 | static void udf_find_vat_block(struct super_block *sb, int p_index, |
1091 | int type1_index, sector_t start_block) | |
38b74a53 JK |
1092 | { |
1093 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1094 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
e971b0b9 | 1095 | sector_t vat_block; |
5ca4e4be | 1096 | struct kernel_lb_addr ino; |
e971b0b9 JK |
1097 | |
1098 | /* | |
1099 | * VAT file entry is in the last recorded block. Some broken disks have | |
1100 | * it a few blocks before so try a bit harder... | |
1101 | */ | |
1102 | ino.partitionReferenceNum = type1_index; | |
1103 | for (vat_block = start_block; | |
1104 | vat_block >= map->s_partition_root && | |
1105 | vat_block >= start_block - 3 && | |
1106 | !sbi->s_vat_inode; vat_block--) { | |
1107 | ino.logicalBlockNum = vat_block - map->s_partition_root; | |
1108 | sbi->s_vat_inode = udf_iget(sb, &ino); | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) | |
1113 | { | |
1114 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1115 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
fa5e0815 JK |
1116 | struct buffer_head *bh = NULL; |
1117 | struct udf_inode_info *vati; | |
1118 | uint32_t pos; | |
1119 | struct virtualAllocationTable20 *vat20; | |
4bf17af0 | 1120 | sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; |
38b74a53 | 1121 | |
e971b0b9 | 1122 | udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); |
4bf17af0 JK |
1123 | if (!sbi->s_vat_inode && |
1124 | sbi->s_last_block != blocks - 1) { | |
1125 | printk(KERN_NOTICE "UDF-fs: Failed to read VAT inode from the" | |
1126 | " last recorded block (%lu), retrying with the last " | |
1127 | "block of the device (%lu).\n", | |
1128 | (unsigned long)sbi->s_last_block, | |
1129 | (unsigned long)blocks - 1); | |
e971b0b9 | 1130 | udf_find_vat_block(sb, p_index, type1_index, blocks - 1); |
4bf17af0 | 1131 | } |
38b74a53 JK |
1132 | if (!sbi->s_vat_inode) |
1133 | return 1; | |
1134 | ||
1135 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
47c9358a | 1136 | map->s_type_specific.s_virtual.s_start_offset = 0; |
38b74a53 JK |
1137 | map->s_type_specific.s_virtual.s_num_entries = |
1138 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1139 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
fa5e0815 JK |
1140 | vati = UDF_I(sbi->s_vat_inode); |
1141 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1142 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1143 | bh = sb_bread(sb, pos); | |
1144 | if (!bh) | |
1145 | return 1; | |
1146 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; | |
1147 | } else { | |
1148 | vat20 = (struct virtualAllocationTable20 *) | |
1149 | vati->i_ext.i_data; | |
1150 | } | |
38b74a53 | 1151 | |
38b74a53 | 1152 | map->s_type_specific.s_virtual.s_start_offset = |
47c9358a | 1153 | le16_to_cpu(vat20->lengthHeader); |
38b74a53 JK |
1154 | map->s_type_specific.s_virtual.s_num_entries = |
1155 | (sbi->s_vat_inode->i_size - | |
1156 | map->s_type_specific.s_virtual. | |
1157 | s_start_offset) >> 2; | |
1158 | brelse(bh); | |
1159 | } | |
1160 | return 0; | |
1161 | } | |
1162 | ||
3fb38dfa JK |
1163 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
1164 | { | |
1165 | struct buffer_head *bh; | |
1166 | struct partitionDesc *p; | |
1167 | struct udf_part_map *map; | |
1168 | struct udf_sb_info *sbi = UDF_SB(sb); | |
38b74a53 | 1169 | int i, type1_idx; |
3fb38dfa JK |
1170 | uint16_t partitionNumber; |
1171 | uint16_t ident; | |
1172 | int ret = 0; | |
1173 | ||
1174 | bh = udf_read_tagged(sb, block, block, &ident); | |
1175 | if (!bh) | |
1176 | return 1; | |
1177 | if (ident != TAG_IDENT_PD) | |
1178 | goto out_bh; | |
1179 | ||
1180 | p = (struct partitionDesc *)bh->b_data; | |
1181 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
38b74a53 | 1182 | |
bfb257a5 | 1183 | /* First scan for TYPE1, SPARABLE and METADATA partitions */ |
3fb38dfa JK |
1184 | for (i = 0; i < sbi->s_partitions; i++) { |
1185 | map = &sbi->s_partmaps[i]; | |
1186 | udf_debug("Searching map: (%d == %d)\n", | |
1187 | map->s_partition_num, partitionNumber); | |
38b74a53 JK |
1188 | if (map->s_partition_num == partitionNumber && |
1189 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1190 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
3fb38dfa JK |
1191 | break; |
1192 | } | |
1193 | ||
38b74a53 | 1194 | if (i >= sbi->s_partitions) { |
3fb38dfa JK |
1195 | udf_debug("Partition (%d) not found in partition map\n", |
1196 | partitionNumber); | |
1197 | goto out_bh; | |
1198 | } | |
165923fa | 1199 | |
3fb38dfa | 1200 | ret = udf_fill_partdesc_info(sb, p, i); |
38b74a53 JK |
1201 | |
1202 | /* | |
bfb257a5 JK |
1203 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
1204 | * PHYSICAL partitions are already set up | |
38b74a53 JK |
1205 | */ |
1206 | type1_idx = i; | |
1207 | for (i = 0; i < sbi->s_partitions; i++) { | |
1208 | map = &sbi->s_partmaps[i]; | |
1209 | ||
1210 | if (map->s_partition_num == partitionNumber && | |
1211 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
bfb257a5 JK |
1212 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
1213 | map->s_partition_type == UDF_METADATA_MAP25)) | |
38b74a53 JK |
1214 | break; |
1215 | } | |
1216 | ||
1217 | if (i >= sbi->s_partitions) | |
1218 | goto out_bh; | |
1219 | ||
1220 | ret = udf_fill_partdesc_info(sb, p, i); | |
1221 | if (ret) | |
1222 | goto out_bh; | |
1223 | ||
bfb257a5 JK |
1224 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
1225 | ret = udf_load_metadata_files(sb, i); | |
1226 | if (ret) { | |
1227 | printk(KERN_ERR "UDF-fs: error loading MetaData " | |
1228 | "partition map %d\n", i); | |
1229 | goto out_bh; | |
1230 | } | |
1231 | } else { | |
1232 | ret = udf_load_vat(sb, i, type1_idx); | |
1233 | if (ret) | |
1234 | goto out_bh; | |
1235 | /* | |
1236 | * Mark filesystem read-only if we have a partition with | |
1237 | * virtual map since we don't handle writing to it (we | |
1238 | * overwrite blocks instead of relocating them). | |
1239 | */ | |
1240 | sb->s_flags |= MS_RDONLY; | |
1241 | printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only " | |
1242 | "because writing to pseudooverwrite partition is " | |
1243 | "not implemented.\n"); | |
1244 | } | |
c0eb31ed | 1245 | out_bh: |
2e0838fd | 1246 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1247 | brelse(bh); |
1248 | return ret; | |
1da177e4 LT |
1249 | } |
1250 | ||
c0eb31ed | 1251 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
5ca4e4be | 1252 | struct kernel_lb_addr *fileset) |
1da177e4 LT |
1253 | { |
1254 | struct logicalVolDesc *lvd; | |
1255 | int i, j, offset; | |
1256 | uint8_t type; | |
6c79e987 | 1257 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1258 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1259 | uint16_t ident; |
1260 | struct buffer_head *bh; | |
1261 | int ret = 0; | |
1da177e4 | 1262 | |
c0eb31ed JK |
1263 | bh = udf_read_tagged(sb, block, block, &ident); |
1264 | if (!bh) | |
1265 | return 1; | |
1266 | BUG_ON(ident != TAG_IDENT_LVD); | |
1da177e4 LT |
1267 | lvd = (struct logicalVolDesc *)bh->b_data; |
1268 | ||
dc5d39be | 1269 | i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
c0eb31ed JK |
1270 | if (i != 0) { |
1271 | ret = i; | |
1272 | goto out_bh; | |
1273 | } | |
1da177e4 | 1274 | |
cb00ea35 | 1275 | for (i = 0, offset = 0; |
6c79e987 | 1276 | i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength); |
4b11111a MS |
1277 | i++, offset += gpm->partitionMapLength) { |
1278 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1279 | gpm = (struct genericPartitionMap *) | |
1280 | &(lvd->partitionMaps[offset]); | |
1281 | type = gpm->partitionMapType; | |
cb00ea35 | 1282 | if (type == 1) { |
4b11111a MS |
1283 | struct genericPartitionMap1 *gpm1 = |
1284 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1285 | map->s_partition_type = UDF_TYPE1_MAP15; |
1286 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1287 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1288 | map->s_partition_func = NULL; | |
cb00ea35 | 1289 | } else if (type == 2) { |
4b11111a MS |
1290 | struct udfPartitionMap2 *upm2 = |
1291 | (struct udfPartitionMap2 *)gpm; | |
1292 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1293 | strlen(UDF_ID_VIRTUAL))) { | |
1294 | u16 suf = | |
1295 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1296 | identSuffix)[0]); | |
c82a1275 | 1297 | if (suf < 0x0200) { |
4b11111a MS |
1298 | map->s_partition_type = |
1299 | UDF_VIRTUAL_MAP15; | |
1300 | map->s_partition_func = | |
1301 | udf_get_pblock_virt15; | |
c82a1275 | 1302 | } else { |
4b11111a MS |
1303 | map->s_partition_type = |
1304 | UDF_VIRTUAL_MAP20; | |
1305 | map->s_partition_func = | |
1306 | udf_get_pblock_virt20; | |
1da177e4 | 1307 | } |
4b11111a MS |
1308 | } else if (!strncmp(upm2->partIdent.ident, |
1309 | UDF_ID_SPARABLE, | |
1310 | strlen(UDF_ID_SPARABLE))) { | |
1da177e4 | 1311 | uint32_t loc; |
1da177e4 | 1312 | struct sparingTable *st; |
4b11111a MS |
1313 | struct sparablePartitionMap *spm = |
1314 | (struct sparablePartitionMap *)gpm; | |
28de7948 | 1315 | |
6c79e987 | 1316 | map->s_partition_type = UDF_SPARABLE_MAP15; |
4b11111a MS |
1317 | map->s_type_specific.s_sparing.s_packet_len = |
1318 | le16_to_cpu(spm->packetLength); | |
cb00ea35 | 1319 | for (j = 0; j < spm->numSparingTables; j++) { |
4b11111a MS |
1320 | struct buffer_head *bh2; |
1321 | ||
1322 | loc = le32_to_cpu( | |
1323 | spm->locSparingTable[j]); | |
1324 | bh2 = udf_read_tagged(sb, loc, loc, | |
1325 | &ident); | |
1326 | map->s_type_specific.s_sparing. | |
1327 | s_spar_map[j] = bh2; | |
1328 | ||
165923fa MS |
1329 | if (bh2 == NULL) |
1330 | continue; | |
1331 | ||
1332 | st = (struct sparingTable *)bh2->b_data; | |
1333 | if (ident != 0 || strncmp( | |
1334 | st->sparingIdent.ident, | |
1335 | UDF_ID_SPARING, | |
1336 | strlen(UDF_ID_SPARING))) { | |
1337 | brelse(bh2); | |
1338 | map->s_type_specific.s_sparing. | |
1339 | s_spar_map[j] = NULL; | |
1da177e4 LT |
1340 | } |
1341 | } | |
6c79e987 | 1342 | map->s_partition_func = udf_get_pblock_spar15; |
bfb257a5 JK |
1343 | } else if (!strncmp(upm2->partIdent.ident, |
1344 | UDF_ID_METADATA, | |
1345 | strlen(UDF_ID_METADATA))) { | |
1346 | struct udf_meta_data *mdata = | |
1347 | &map->s_type_specific.s_metadata; | |
1348 | struct metadataPartitionMap *mdm = | |
1349 | (struct metadataPartitionMap *) | |
1350 | &(lvd->partitionMaps[offset]); | |
1351 | udf_debug("Parsing Logical vol part %d " | |
1352 | "type %d id=%s\n", i, type, | |
1353 | UDF_ID_METADATA); | |
1354 | ||
1355 | map->s_partition_type = UDF_METADATA_MAP25; | |
1356 | map->s_partition_func = udf_get_pblock_meta25; | |
1357 | ||
1358 | mdata->s_meta_file_loc = | |
1359 | le32_to_cpu(mdm->metadataFileLoc); | |
1360 | mdata->s_mirror_file_loc = | |
1361 | le32_to_cpu(mdm->metadataMirrorFileLoc); | |
1362 | mdata->s_bitmap_file_loc = | |
1363 | le32_to_cpu(mdm->metadataBitmapFileLoc); | |
1364 | mdata->s_alloc_unit_size = | |
1365 | le32_to_cpu(mdm->allocUnitSize); | |
1366 | mdata->s_align_unit_size = | |
1367 | le16_to_cpu(mdm->alignUnitSize); | |
1368 | mdata->s_dup_md_flag = | |
1369 | mdm->flags & 0x01; | |
1370 | ||
1371 | udf_debug("Metadata Ident suffix=0x%x\n", | |
1372 | (le16_to_cpu( | |
1373 | ((__le16 *) | |
1374 | mdm->partIdent.identSuffix)[0]))); | |
1375 | udf_debug("Metadata part num=%d\n", | |
1376 | le16_to_cpu(mdm->partitionNum)); | |
1377 | udf_debug("Metadata part alloc unit size=%d\n", | |
1378 | le32_to_cpu(mdm->allocUnitSize)); | |
1379 | udf_debug("Metadata file loc=%d\n", | |
1380 | le32_to_cpu(mdm->metadataFileLoc)); | |
1381 | udf_debug("Mirror file loc=%d\n", | |
1382 | le32_to_cpu(mdm->metadataMirrorFileLoc)); | |
1383 | udf_debug("Bitmap file loc=%d\n", | |
1384 | le32_to_cpu(mdm->metadataBitmapFileLoc)); | |
1385 | udf_debug("Duplicate Flag: %d %d\n", | |
1386 | mdata->s_dup_md_flag, mdm->flags); | |
cb00ea35 | 1387 | } else { |
3a71fc5d MS |
1388 | udf_debug("Unknown ident: %s\n", |
1389 | upm2->partIdent.ident); | |
1da177e4 LT |
1390 | continue; |
1391 | } | |
6c79e987 MS |
1392 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1393 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 LT |
1394 | } |
1395 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
6c79e987 MS |
1396 | i, map->s_partition_num, type, |
1397 | map->s_volumeseqnum); | |
1da177e4 LT |
1398 | } |
1399 | ||
cb00ea35 | 1400 | if (fileset) { |
5ca4e4be | 1401 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1402 | |
1403 | *fileset = lelb_to_cpu(la->extLocation); | |
3a71fc5d MS |
1404 | udf_debug("FileSet found in LogicalVolDesc at block=%d, " |
1405 | "partition=%d\n", fileset->logicalBlockNum, | |
28de7948 | 1406 | fileset->partitionReferenceNum); |
1da177e4 LT |
1407 | } |
1408 | if (lvd->integritySeqExt.extLength) | |
1409 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
28de7948 | 1410 | |
c0eb31ed JK |
1411 | out_bh: |
1412 | brelse(bh); | |
1413 | return ret; | |
1da177e4 LT |
1414 | } |
1415 | ||
1416 | /* | |
1417 | * udf_load_logicalvolint | |
1418 | * | |
1419 | */ | |
5ca4e4be | 1420 | static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) |
1da177e4 LT |
1421 | { |
1422 | struct buffer_head *bh = NULL; | |
1423 | uint16_t ident; | |
6c79e987 MS |
1424 | struct udf_sb_info *sbi = UDF_SB(sb); |
1425 | struct logicalVolIntegrityDesc *lvid; | |
1da177e4 LT |
1426 | |
1427 | while (loc.extLength > 0 && | |
cb00ea35 CG |
1428 | (bh = udf_read_tagged(sb, loc.extLocation, |
1429 | loc.extLocation, &ident)) && | |
1430 | ident == TAG_IDENT_LVID) { | |
6c79e987 MS |
1431 | sbi->s_lvid_bh = bh; |
1432 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
cb00ea35 | 1433 | |
6c79e987 | 1434 | if (lvid->nextIntegrityExt.extLength) |
3a71fc5d | 1435 | udf_load_logicalvolint(sb, |
6c79e987 | 1436 | leea_to_cpu(lvid->nextIntegrityExt)); |
cb00ea35 | 1437 | |
6c79e987 | 1438 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1439 | brelse(bh); |
1da177e4 | 1440 | loc.extLength -= sb->s_blocksize; |
cb00ea35 | 1441 | loc.extLocation++; |
1da177e4 | 1442 | } |
6c79e987 | 1443 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1444 | brelse(bh); |
1da177e4 LT |
1445 | } |
1446 | ||
1447 | /* | |
1448 | * udf_process_sequence | |
1449 | * | |
1450 | * PURPOSE | |
1451 | * Process a main/reserve volume descriptor sequence. | |
1452 | * | |
1453 | * PRE-CONDITIONS | |
1454 | * sb Pointer to _locked_ superblock. | |
1455 | * block First block of first extent of the sequence. | |
1456 | * lastblock Lastblock of first extent of the sequence. | |
1457 | * | |
1458 | * HISTORY | |
1459 | * July 1, 1997 - Andrew E. Mileski | |
1460 | * Written, tested, and released. | |
1461 | */ | |
200a3592 | 1462 | static noinline int udf_process_sequence(struct super_block *sb, long block, |
5ca4e4be | 1463 | long lastblock, struct kernel_lb_addr *fileset) |
1da177e4 LT |
1464 | { |
1465 | struct buffer_head *bh = NULL; | |
1466 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
4b11111a | 1467 | struct udf_vds_record *curr; |
1da177e4 LT |
1468 | struct generic_desc *gd; |
1469 | struct volDescPtr *vdp; | |
cb00ea35 | 1470 | int done = 0; |
1da177e4 LT |
1471 | uint32_t vdsn; |
1472 | uint16_t ident; | |
1473 | long next_s = 0, next_e = 0; | |
1474 | ||
1475 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1476 | ||
c0eb31ed JK |
1477 | /* |
1478 | * Read the main descriptor sequence and find which descriptors | |
1479 | * are in it. | |
1480 | */ | |
cb00ea35 | 1481 | for (; (!done && block <= lastblock); block++) { |
1da177e4 LT |
1482 | |
1483 | bh = udf_read_tagged(sb, block, block, &ident); | |
c0eb31ed JK |
1484 | if (!bh) { |
1485 | printk(KERN_ERR "udf: Block %Lu of volume descriptor " | |
1486 | "sequence is corrupted or we could not read " | |
1487 | "it.\n", (unsigned long long)block); | |
1488 | return 1; | |
1489 | } | |
1da177e4 LT |
1490 | |
1491 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1492 | gd = (struct generic_desc *)bh->b_data; | |
1493 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1494 | switch (ident) { |
28de7948 | 1495 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
4b11111a MS |
1496 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
1497 | if (vdsn >= curr->volDescSeqNum) { | |
1498 | curr->volDescSeqNum = vdsn; | |
1499 | curr->block = block; | |
cb00ea35 CG |
1500 | } |
1501 | break; | |
28de7948 | 1502 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
4b11111a MS |
1503 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
1504 | if (vdsn >= curr->volDescSeqNum) { | |
1505 | curr->volDescSeqNum = vdsn; | |
1506 | curr->block = block; | |
cb00ea35 CG |
1507 | |
1508 | vdp = (struct volDescPtr *)bh->b_data; | |
4b11111a MS |
1509 | next_s = le32_to_cpu( |
1510 | vdp->nextVolDescSeqExt.extLocation); | |
1511 | next_e = le32_to_cpu( | |
1512 | vdp->nextVolDescSeqExt.extLength); | |
cb00ea35 CG |
1513 | next_e = next_e >> sb->s_blocksize_bits; |
1514 | next_e += next_s; | |
1515 | } | |
1516 | break; | |
28de7948 | 1517 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
4b11111a MS |
1518 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
1519 | if (vdsn >= curr->volDescSeqNum) { | |
1520 | curr->volDescSeqNum = vdsn; | |
1521 | curr->block = block; | |
cb00ea35 CG |
1522 | } |
1523 | break; | |
28de7948 | 1524 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
4b11111a MS |
1525 | curr = &vds[VDS_POS_PARTITION_DESC]; |
1526 | if (!curr->block) | |
1527 | curr->block = block; | |
cb00ea35 | 1528 | break; |
28de7948 | 1529 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
4b11111a MS |
1530 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
1531 | if (vdsn >= curr->volDescSeqNum) { | |
1532 | curr->volDescSeqNum = vdsn; | |
1533 | curr->block = block; | |
cb00ea35 CG |
1534 | } |
1535 | break; | |
28de7948 | 1536 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
4b11111a MS |
1537 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
1538 | if (vdsn >= curr->volDescSeqNum) { | |
1539 | curr->volDescSeqNum = vdsn; | |
1540 | curr->block = block; | |
cb00ea35 CG |
1541 | } |
1542 | break; | |
28de7948 | 1543 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
cb00ea35 CG |
1544 | vds[VDS_POS_TERMINATING_DESC].block = block; |
1545 | if (next_e) { | |
1546 | block = next_s; | |
1547 | lastblock = next_e; | |
1548 | next_s = next_e = 0; | |
4b11111a | 1549 | } else |
cb00ea35 CG |
1550 | done = 1; |
1551 | break; | |
1da177e4 | 1552 | } |
3bf25cb4 | 1553 | brelse(bh); |
1da177e4 | 1554 | } |
c0eb31ed JK |
1555 | /* |
1556 | * Now read interesting descriptors again and process them | |
1557 | * in a suitable order | |
1558 | */ | |
1559 | if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { | |
1560 | printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n"); | |
1561 | return 1; | |
1562 | } | |
1563 | if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) | |
1564 | return 1; | |
165923fa | 1565 | |
c0eb31ed JK |
1566 | if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, |
1567 | vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) | |
1568 | return 1; | |
165923fa | 1569 | |
c0eb31ed JK |
1570 | if (vds[VDS_POS_PARTITION_DESC].block) { |
1571 | /* | |
1572 | * We rescan the whole descriptor sequence to find | |
1573 | * partition descriptor blocks and process them. | |
1574 | */ | |
1575 | for (block = vds[VDS_POS_PARTITION_DESC].block; | |
1576 | block < vds[VDS_POS_TERMINATING_DESC].block; | |
1577 | block++) | |
1578 | if (udf_load_partdesc(sb, block)) | |
165923fa | 1579 | return 1; |
1da177e4 LT |
1580 | } |
1581 | ||
1582 | return 0; | |
1583 | } | |
1584 | ||
40346005 JK |
1585 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, |
1586 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1587 | { |
40346005 JK |
1588 | struct anchorVolDescPtr *anchor; |
1589 | long main_s, main_e, reserve_s, reserve_e; | |
1590 | struct udf_sb_info *sbi; | |
1da177e4 | 1591 | |
40346005 JK |
1592 | sbi = UDF_SB(sb); |
1593 | anchor = (struct anchorVolDescPtr *)bh->b_data; | |
1594 | ||
1595 | /* Locate the main sequence */ | |
1596 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1597 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1598 | main_e = main_e >> sb->s_blocksize_bits; | |
1599 | main_e += main_s; | |
1600 | ||
1601 | /* Locate the reserve sequence */ | |
1602 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); | |
1603 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); | |
1604 | reserve_e = reserve_e >> sb->s_blocksize_bits; | |
1605 | reserve_e += reserve_s; | |
1606 | ||
1607 | /* Process the main & reserve sequences */ | |
1608 | /* responsible for finding the PartitionDesc(s) */ | |
1609 | if (!udf_process_sequence(sb, main_s, main_e, fileset)) | |
1610 | return 1; | |
1611 | return !udf_process_sequence(sb, reserve_s, reserve_e, fileset); | |
1da177e4 LT |
1612 | } |
1613 | ||
40346005 JK |
1614 | /* |
1615 | * Check whether there is an anchor block in the given block and | |
1616 | * load Volume Descriptor Sequence if so. | |
1617 | */ | |
1618 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, | |
1619 | struct kernel_lb_addr *fileset) | |
1197e4df | 1620 | { |
40346005 JK |
1621 | struct buffer_head *bh; |
1622 | uint16_t ident; | |
1623 | int ret; | |
1197e4df | 1624 | |
40346005 JK |
1625 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
1626 | udf_fixed_to_variable(block) >= | |
1627 | sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) | |
1197e4df | 1628 | return 0; |
40346005 JK |
1629 | |
1630 | bh = udf_read_tagged(sb, block, block, &ident); | |
1631 | if (!bh) | |
1197e4df | 1632 | return 0; |
40346005 JK |
1633 | if (ident != TAG_IDENT_AVDP) { |
1634 | brelse(bh); | |
1197e4df CL |
1635 | return 0; |
1636 | } | |
40346005 JK |
1637 | ret = udf_load_sequence(sb, bh, fileset); |
1638 | brelse(bh); | |
1639 | return ret; | |
1197e4df CL |
1640 | } |
1641 | ||
40346005 JK |
1642 | /* Search for an anchor volume descriptor pointer */ |
1643 | static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock, | |
1644 | struct kernel_lb_addr *fileset) | |
1da177e4 | 1645 | { |
40346005 | 1646 | sector_t last[6]; |
38b74a53 | 1647 | int i; |
40346005 JK |
1648 | struct udf_sb_info *sbi = UDF_SB(sb); |
1649 | int last_count = 0; | |
1da177e4 | 1650 | |
40346005 JK |
1651 | /* First try user provided anchor */ |
1652 | if (sbi->s_anchor) { | |
1653 | if (udf_check_anchor_block(sb, sbi->s_anchor, fileset)) | |
1654 | return lastblock; | |
1655 | } | |
1656 | /* | |
1657 | * according to spec, anchor is in either: | |
1658 | * block 256 | |
1659 | * lastblock-256 | |
1660 | * lastblock | |
1661 | * however, if the disc isn't closed, it could be 512. | |
1662 | */ | |
1663 | if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset)) | |
1664 | return lastblock; | |
1665 | /* | |
1666 | * The trouble is which block is the last one. Drives often misreport | |
1667 | * this so we try various possibilities. | |
1668 | */ | |
1669 | last[last_count++] = lastblock; | |
1670 | if (lastblock >= 1) | |
1671 | last[last_count++] = lastblock - 1; | |
1672 | last[last_count++] = lastblock + 1; | |
1673 | if (lastblock >= 2) | |
1674 | last[last_count++] = lastblock - 2; | |
1675 | if (lastblock >= 150) | |
1676 | last[last_count++] = lastblock - 150; | |
1677 | if (lastblock >= 152) | |
1678 | last[last_count++] = lastblock - 152; | |
1da177e4 | 1679 | |
40346005 JK |
1680 | for (i = 0; i < last_count; i++) { |
1681 | if (last[i] >= sb->s_bdev->bd_inode->i_size >> | |
1682 | sb->s_blocksize_bits) | |
28f7c4d4 | 1683 | continue; |
40346005 JK |
1684 | if (udf_check_anchor_block(sb, last[i], fileset)) |
1685 | return last[i]; | |
1686 | if (last[i] < 256) | |
28f7c4d4 | 1687 | continue; |
40346005 JK |
1688 | if (udf_check_anchor_block(sb, last[i] - 256, fileset)) |
1689 | return last[i]; | |
1690 | } | |
28f7c4d4 | 1691 | |
40346005 JK |
1692 | /* Finally try block 512 in case media is open */ |
1693 | if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset)) | |
1694 | return last[0]; | |
1695 | return 0; | |
1696 | } | |
28f7c4d4 | 1697 | |
40346005 JK |
1698 | /* |
1699 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from | |
1700 | * area specified by it. The function expects sbi->s_lastblock to be the last | |
1701 | * block on the media. | |
1702 | * | |
1703 | * Return 1 if ok, 0 if not found. | |
1704 | * | |
1705 | */ | |
1706 | static int udf_find_anchor(struct super_block *sb, | |
1707 | struct kernel_lb_addr *fileset) | |
1708 | { | |
1709 | sector_t lastblock; | |
1710 | struct udf_sb_info *sbi = UDF_SB(sb); | |
28f7c4d4 | 1711 | |
40346005 JK |
1712 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); |
1713 | if (lastblock) | |
1714 | goto out; | |
1da177e4 | 1715 | |
40346005 JK |
1716 | /* No anchor found? Try VARCONV conversion of block numbers */ |
1717 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
1718 | /* Firstly, we try to not convert number of the last block */ | |
1719 | lastblock = udf_scan_anchors(sb, | |
1720 | udf_variable_to_fixed(sbi->s_last_block), | |
1721 | fileset); | |
1722 | if (lastblock) | |
1723 | goto out; | |
1da177e4 | 1724 | |
40346005 JK |
1725 | /* Secondly, we try with converted number of the last block */ |
1726 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); | |
1727 | if (!lastblock) { | |
1728 | /* VARCONV didn't help. Clear it. */ | |
1729 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); | |
1730 | return 0; | |
1da177e4 | 1731 | } |
40346005 JK |
1732 | out: |
1733 | sbi->s_last_block = lastblock; | |
1734 | return 1; | |
1735 | } | |
1da177e4 | 1736 | |
40346005 JK |
1737 | /* |
1738 | * Check Volume Structure Descriptor, find Anchor block and load Volume | |
1739 | * Descriptor Sequence | |
1740 | */ | |
1741 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, | |
1742 | int silent, struct kernel_lb_addr *fileset) | |
1743 | { | |
1744 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1745 | loff_t nsr_off; | |
1746 | ||
1747 | if (!sb_set_blocksize(sb, uopt->blocksize)) { | |
1748 | if (!silent) | |
1749 | printk(KERN_WARNING "UDF-fs: Bad block size\n"); | |
1750 | return 0; | |
1751 | } | |
1752 | sbi->s_last_block = uopt->lastblock; | |
1753 | if (!uopt->novrs) { | |
1754 | /* Check that it is NSR02 compliant */ | |
1755 | nsr_off = udf_check_vsd(sb); | |
1756 | if (!nsr_off) { | |
1757 | if (!silent) | |
1758 | printk(KERN_WARNING "UDF-fs: No VRS found\n"); | |
1759 | return 0; | |
1760 | } | |
1761 | if (nsr_off == -1) | |
1762 | udf_debug("Failed to read byte 32768. Assuming open " | |
1763 | "disc. Skipping validity check\n"); | |
1764 | if (!sbi->s_last_block) | |
1765 | sbi->s_last_block = udf_get_last_block(sb); | |
1766 | } else { | |
1767 | udf_debug("Validity check skipped because of novrs option\n"); | |
28f7c4d4 | 1768 | } |
1da177e4 | 1769 | |
40346005 JK |
1770 | /* Look for anchor block and load Volume Descriptor Sequence */ |
1771 | sbi->s_anchor = uopt->anchor; | |
1772 | if (!udf_find_anchor(sb, fileset)) { | |
1773 | if (!silent) | |
1774 | printk(KERN_WARNING "UDF-fs: No anchor found\n"); | |
1775 | return 0; | |
1776 | } | |
1777 | return 1; | |
1da177e4 LT |
1778 | } |
1779 | ||
1780 | static void udf_open_lvid(struct super_block *sb) | |
1781 | { | |
6c79e987 MS |
1782 | struct udf_sb_info *sbi = UDF_SB(sb); |
1783 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
1784 | struct logicalVolIntegrityDesc *lvid; |
1785 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
146bca72 | 1786 | |
165923fa MS |
1787 | if (!bh) |
1788 | return; | |
165923fa MS |
1789 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
1790 | lvidiu = udf_sb_lvidiu(sbi); | |
1791 | ||
1792 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1793 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1794 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, | |
1795 | CURRENT_TIME); | |
146bca72 | 1796 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); |
165923fa MS |
1797 | |
1798 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1799 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 1800 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
1801 | |
1802 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1803 | mark_buffer_dirty(bh); | |
146bca72 | 1804 | sbi->s_lvid_dirty = 0; |
1da177e4 LT |
1805 | } |
1806 | ||
1807 | static void udf_close_lvid(struct super_block *sb) | |
1808 | { | |
6c79e987 MS |
1809 | struct udf_sb_info *sbi = UDF_SB(sb); |
1810 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1811 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 1812 | struct logicalVolIntegrityDescImpUse *lvidiu; |
28de7948 | 1813 | |
6c79e987 MS |
1814 | if (!bh) |
1815 | return; | |
1816 | ||
1817 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
165923fa MS |
1818 | lvidiu = udf_sb_lvidiu(sbi); |
1819 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1820 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1821 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); | |
1822 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) | |
1823 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
1824 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
1825 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
1826 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
1827 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
1828 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
1829 | ||
1830 | lvid->descTag.descCRC = cpu_to_le16( | |
5ca4e4be | 1831 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
f845fced | 1832 | le16_to_cpu(lvid->descTag.descCRCLength))); |
165923fa MS |
1833 | |
1834 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1835 | mark_buffer_dirty(bh); | |
146bca72 | 1836 | sbi->s_lvid_dirty = 0; |
1da177e4 LT |
1837 | } |
1838 | ||
66e1da3f MS |
1839 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
1840 | { | |
1841 | int i; | |
1842 | int nr_groups = bitmap->s_nr_groups; | |
4b11111a MS |
1843 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * |
1844 | nr_groups); | |
66e1da3f MS |
1845 | |
1846 | for (i = 0; i < nr_groups; i++) | |
1847 | if (bitmap->s_block_bitmap[i]) | |
1848 | brelse(bitmap->s_block_bitmap[i]); | |
1849 | ||
1850 | if (size <= PAGE_SIZE) | |
1851 | kfree(bitmap); | |
1852 | else | |
1853 | vfree(bitmap); | |
1854 | } | |
1855 | ||
2e0838fd JK |
1856 | static void udf_free_partition(struct udf_part_map *map) |
1857 | { | |
1858 | int i; | |
bfb257a5 | 1859 | struct udf_meta_data *mdata; |
2e0838fd JK |
1860 | |
1861 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
1862 | iput(map->s_uspace.s_table); | |
1863 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
1864 | iput(map->s_fspace.s_table); | |
1865 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
1866 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
1867 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) | |
1868 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); | |
1869 | if (map->s_partition_type == UDF_SPARABLE_MAP15) | |
1870 | for (i = 0; i < 4; i++) | |
1871 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
bfb257a5 JK |
1872 | else if (map->s_partition_type == UDF_METADATA_MAP25) { |
1873 | mdata = &map->s_type_specific.s_metadata; | |
1874 | iput(mdata->s_metadata_fe); | |
1875 | mdata->s_metadata_fe = NULL; | |
1876 | ||
1877 | iput(mdata->s_mirror_fe); | |
1878 | mdata->s_mirror_fe = NULL; | |
1879 | ||
1880 | iput(mdata->s_bitmap_fe); | |
1881 | mdata->s_bitmap_fe = NULL; | |
1882 | } | |
2e0838fd JK |
1883 | } |
1884 | ||
1da177e4 LT |
1885 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
1886 | { | |
1887 | int i; | |
40346005 | 1888 | int ret; |
cb00ea35 | 1889 | struct inode *inode = NULL; |
1da177e4 | 1890 | struct udf_options uopt; |
5ca4e4be | 1891 | struct kernel_lb_addr rootdir, fileset; |
1da177e4 LT |
1892 | struct udf_sb_info *sbi; |
1893 | ||
1894 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
1895 | uopt.uid = -1; | |
1896 | uopt.gid = -1; | |
1897 | uopt.umask = 0; | |
87bc730c MS |
1898 | uopt.fmode = UDF_INVALID_MODE; |
1899 | uopt.dmode = UDF_INVALID_MODE; | |
1da177e4 | 1900 | |
6c79e987 | 1901 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
1da177e4 LT |
1902 | if (!sbi) |
1903 | return -ENOMEM; | |
28de7948 | 1904 | |
1da177e4 | 1905 | sb->s_fs_info = sbi; |
1da177e4 | 1906 | |
1e7933de | 1907 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 1908 | |
6da80894 | 1909 | if (!udf_parse_options((char *)options, &uopt, false)) |
1da177e4 LT |
1910 | goto error_out; |
1911 | ||
1912 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 1913 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
1da177e4 | 1914 | udf_error(sb, "udf_read_super", |
cb00ea35 | 1915 | "utf8 cannot be combined with iocharset\n"); |
1da177e4 LT |
1916 | goto error_out; |
1917 | } | |
1918 | #ifdef CONFIG_UDF_NLS | |
cb00ea35 | 1919 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
1920 | uopt.nls_map = load_nls_default(); |
1921 | if (!uopt.nls_map) | |
1922 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
1923 | else | |
1924 | udf_debug("Using default NLS map\n"); | |
1925 | } | |
1926 | #endif | |
1927 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
1928 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
1929 | ||
1930 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
1931 | fileset.partitionReferenceNum = 0xFFFF; | |
1932 | ||
6c79e987 MS |
1933 | sbi->s_flags = uopt.flags; |
1934 | sbi->s_uid = uopt.uid; | |
1935 | sbi->s_gid = uopt.gid; | |
1936 | sbi->s_umask = uopt.umask; | |
7ac9bcd5 MS |
1937 | sbi->s_fmode = uopt.fmode; |
1938 | sbi->s_dmode = uopt.dmode; | |
6c79e987 | 1939 | sbi->s_nls_map = uopt.nls_map; |
1da177e4 | 1940 | |
cb00ea35 | 1941 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 1942 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 1943 | else |
6c79e987 | 1944 | sbi->s_session = uopt.session; |
1da177e4 | 1945 | |
6c79e987 | 1946 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 1947 | |
40346005 JK |
1948 | /* Fill in the rest of the superblock */ |
1949 | sb->s_op = &udf_sb_ops; | |
1950 | sb->s_export_op = &udf_export_ops; | |
1951 | sb->dq_op = NULL; | |
1952 | sb->s_dirt = 0; | |
1953 | sb->s_magic = UDF_SUPER_MAGIC; | |
1954 | sb->s_time_gran = 1000; | |
1955 | ||
1197e4df | 1956 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { |
40346005 | 1957 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 1958 | } else { |
e1defc4f | 1959 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); |
40346005 JK |
1960 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1961 | if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { | |
1197e4df CL |
1962 | if (!silent) |
1963 | printk(KERN_NOTICE | |
1964 | "UDF-fs: Rescanning with blocksize " | |
1965 | "%d\n", UDF_DEFAULT_BLOCKSIZE); | |
1966 | uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; | |
40346005 | 1967 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
1197e4df | 1968 | } |
1da177e4 | 1969 | } |
40346005 | 1970 | if (!ret) { |
3a71fc5d | 1971 | printk(KERN_WARNING "UDF-fs: No partition found (1)\n"); |
1da177e4 LT |
1972 | goto error_out; |
1973 | } | |
1974 | ||
6c79e987 | 1975 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
1da177e4 | 1976 | |
6c79e987 | 1977 | if (sbi->s_lvid_bh) { |
4b11111a MS |
1978 | struct logicalVolIntegrityDescImpUse *lvidiu = |
1979 | udf_sb_lvidiu(sbi); | |
6c79e987 MS |
1980 | uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); |
1981 | uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
4b11111a MS |
1982 | /* uint16_t maxUDFWriteRev = |
1983 | le16_to_cpu(lvidiu->maxUDFWriteRev); */ | |
1da177e4 | 1984 | |
cb00ea35 | 1985 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
4b11111a MS |
1986 | printk(KERN_ERR "UDF-fs: minUDFReadRev=%x " |
1987 | "(max is %x)\n", | |
6c79e987 | 1988 | le16_to_cpu(lvidiu->minUDFReadRev), |
cb00ea35 | 1989 | UDF_MAX_READ_VERSION); |
1da177e4 | 1990 | goto error_out; |
4b11111a | 1991 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) |
1da177e4 | 1992 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 1993 | |
6c79e987 | 1994 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
1995 | |
1996 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
1997 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
1998 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
1999 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
2000 | } | |
2001 | ||
6c79e987 | 2002 | if (!sbi->s_partitions) { |
3a71fc5d | 2003 | printk(KERN_WARNING "UDF-fs: No partition found (2)\n"); |
1da177e4 LT |
2004 | goto error_out; |
2005 | } | |
2006 | ||
4b11111a MS |
2007 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
2008 | UDF_PART_FLAG_READ_ONLY) { | |
2009 | printk(KERN_NOTICE "UDF-fs: Partition marked readonly; " | |
2010 | "forcing readonly mount\n"); | |
39b3f6d6 | 2011 | sb->s_flags |= MS_RDONLY; |
c1a26e7d | 2012 | } |
39b3f6d6 | 2013 | |
cb00ea35 | 2014 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
3a71fc5d | 2015 | printk(KERN_WARNING "UDF-fs: No fileset found\n"); |
1da177e4 LT |
2016 | goto error_out; |
2017 | } | |
2018 | ||
cb00ea35 | 2019 | if (!silent) { |
5ca4e4be | 2020 | struct timestamp ts; |
56774805 | 2021 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); |
a9ca6635 | 2022 | udf_info("UDF: Mounting volume '%s', " |
28de7948 | 2023 | "timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
56774805 MS |
2024 | sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day, |
2025 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); | |
1da177e4 LT |
2026 | } |
2027 | if (!(sb->s_flags & MS_RDONLY)) | |
2028 | udf_open_lvid(sb); | |
2029 | ||
2030 | /* Assign the root inode */ | |
2031 | /* assign inodes by physical block number */ | |
2032 | /* perhaps it's not extensible enough, but for now ... */ | |
97e961fd | 2033 | inode = udf_iget(sb, &rootdir); |
cb00ea35 | 2034 | if (!inode) { |
4b11111a MS |
2035 | printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, " |
2036 | "partition=%d\n", | |
cb00ea35 | 2037 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
1da177e4 LT |
2038 | goto error_out; |
2039 | } | |
2040 | ||
2041 | /* Allocate a dentry for the root inode */ | |
2042 | sb->s_root = d_alloc_root(inode); | |
cb00ea35 | 2043 | if (!sb->s_root) { |
3a71fc5d | 2044 | printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n"); |
1da177e4 LT |
2045 | iput(inode); |
2046 | goto error_out; | |
2047 | } | |
31170b6a | 2048 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
1da177e4 LT |
2049 | return 0; |
2050 | ||
28de7948 | 2051 | error_out: |
6c79e987 MS |
2052 | if (sbi->s_vat_inode) |
2053 | iput(sbi->s_vat_inode); | |
2e0838fd JK |
2054 | if (sbi->s_partitions) |
2055 | for (i = 0; i < sbi->s_partitions; i++) | |
2056 | udf_free_partition(&sbi->s_partmaps[i]); | |
1da177e4 LT |
2057 | #ifdef CONFIG_UDF_NLS |
2058 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2059 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2060 | #endif |
2061 | if (!(sb->s_flags & MS_RDONLY)) | |
2062 | udf_close_lvid(sb); | |
6c79e987 MS |
2063 | brelse(sbi->s_lvid_bh); |
2064 | ||
2065 | kfree(sbi->s_partmaps); | |
1da177e4 LT |
2066 | kfree(sbi); |
2067 | sb->s_fs_info = NULL; | |
28de7948 | 2068 | |
1da177e4 LT |
2069 | return -EINVAL; |
2070 | } | |
2071 | ||
b8145a76 AB |
2072 | static void udf_error(struct super_block *sb, const char *function, |
2073 | const char *fmt, ...) | |
1da177e4 LT |
2074 | { |
2075 | va_list args; | |
2076 | ||
cb00ea35 | 2077 | if (!(sb->s_flags & MS_RDONLY)) { |
1da177e4 LT |
2078 | /* mark sb error */ |
2079 | sb->s_dirt = 1; | |
2080 | } | |
2081 | va_start(args, fmt); | |
4a6e617a | 2082 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 | 2083 | va_end(args); |
3a71fc5d | 2084 | printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n", |
28de7948 | 2085 | sb->s_id, function, error_buf); |
1da177e4 LT |
2086 | } |
2087 | ||
2088 | void udf_warning(struct super_block *sb, const char *function, | |
cb00ea35 | 2089 | const char *fmt, ...) |
1da177e4 LT |
2090 | { |
2091 | va_list args; | |
2092 | ||
cb00ea35 | 2093 | va_start(args, fmt); |
4a6e617a | 2094 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 LT |
2095 | va_end(args); |
2096 | printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n", | |
cb00ea35 | 2097 | sb->s_id, function, error_buf); |
1da177e4 LT |
2098 | } |
2099 | ||
cb00ea35 | 2100 | static void udf_put_super(struct super_block *sb) |
1da177e4 LT |
2101 | { |
2102 | int i; | |
6c79e987 | 2103 | struct udf_sb_info *sbi; |
1da177e4 | 2104 | |
e0ccfd95 CH |
2105 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
2106 | ||
6c79e987 | 2107 | sbi = UDF_SB(sb); |
6cfd0148 CH |
2108 | |
2109 | lock_kernel(); | |
2110 | ||
6c79e987 MS |
2111 | if (sbi->s_vat_inode) |
2112 | iput(sbi->s_vat_inode); | |
2e0838fd JK |
2113 | if (sbi->s_partitions) |
2114 | for (i = 0; i < sbi->s_partitions; i++) | |
2115 | udf_free_partition(&sbi->s_partmaps[i]); | |
1da177e4 LT |
2116 | #ifdef CONFIG_UDF_NLS |
2117 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2118 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2119 | #endif |
2120 | if (!(sb->s_flags & MS_RDONLY)) | |
2121 | udf_close_lvid(sb); | |
6c79e987 MS |
2122 | brelse(sbi->s_lvid_bh); |
2123 | kfree(sbi->s_partmaps); | |
1da177e4 LT |
2124 | kfree(sb->s_fs_info); |
2125 | sb->s_fs_info = NULL; | |
6cfd0148 CH |
2126 | |
2127 | unlock_kernel(); | |
1da177e4 LT |
2128 | } |
2129 | ||
146bca72 JK |
2130 | static int udf_sync_fs(struct super_block *sb, int wait) |
2131 | { | |
2132 | struct udf_sb_info *sbi = UDF_SB(sb); | |
2133 | ||
2134 | mutex_lock(&sbi->s_alloc_mutex); | |
2135 | if (sbi->s_lvid_dirty) { | |
2136 | /* | |
2137 | * Blockdevice will be synced later so we don't have to submit | |
2138 | * the buffer for IO | |
2139 | */ | |
2140 | mark_buffer_dirty(sbi->s_lvid_bh); | |
2141 | sb->s_dirt = 0; | |
2142 | sbi->s_lvid_dirty = 0; | |
2143 | } | |
2144 | mutex_unlock(&sbi->s_alloc_mutex); | |
2145 | ||
2146 | return 0; | |
2147 | } | |
2148 | ||
cb00ea35 | 2149 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2150 | { |
726c3342 | 2151 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
2152 | struct udf_sb_info *sbi = UDF_SB(sb); |
2153 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
557f5a14 | 2154 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
6c79e987 MS |
2155 | |
2156 | if (sbi->s_lvid_bh != NULL) | |
2157 | lvidiu = udf_sb_lvidiu(sbi); | |
2158 | else | |
2159 | lvidiu = NULL; | |
726c3342 | 2160 | |
1da177e4 LT |
2161 | buf->f_type = UDF_SUPER_MAGIC; |
2162 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 2163 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
2164 | buf->f_bfree = udf_count_free(sb); |
2165 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
2166 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
2167 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
2168 | + buf->f_bfree; | |
1da177e4 | 2169 | buf->f_ffree = buf->f_bfree; |
cb00ea35 | 2170 | buf->f_namelen = UDF_NAME_LEN - 2; |
557f5a14 CL |
2171 | buf->f_fsid.val[0] = (u32)id; |
2172 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
1da177e4 LT |
2173 | |
2174 | return 0; | |
2175 | } | |
2176 | ||
4b11111a MS |
2177 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
2178 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
2179 | { |
2180 | struct buffer_head *bh = NULL; | |
2181 | unsigned int accum = 0; | |
2182 | int index; | |
2183 | int block = 0, newblock; | |
5ca4e4be | 2184 | struct kernel_lb_addr loc; |
1da177e4 | 2185 | uint32_t bytes; |
1da177e4 LT |
2186 | uint8_t *ptr; |
2187 | uint16_t ident; | |
2188 | struct spaceBitmapDesc *bm; | |
2189 | ||
2190 | lock_kernel(); | |
2191 | ||
2192 | loc.logicalBlockNum = bitmap->s_extPosition; | |
6c79e987 | 2193 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
97e961fd | 2194 | bh = udf_read_ptagged(sb, &loc, 0, &ident); |
1da177e4 | 2195 | |
cb00ea35 | 2196 | if (!bh) { |
1da177e4 LT |
2197 | printk(KERN_ERR "udf: udf_count_free failed\n"); |
2198 | goto out; | |
cb00ea35 | 2199 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 2200 | brelse(bh); |
1da177e4 LT |
2201 | printk(KERN_ERR "udf: udf_count_free failed\n"); |
2202 | goto out; | |
2203 | } | |
2204 | ||
2205 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2206 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
2207 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
2208 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 2209 | |
cb00ea35 | 2210 | while (bytes > 0) { |
01b954a3 MS |
2211 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
2212 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2213 | cur_bytes * 8); | |
2214 | bytes -= cur_bytes; | |
cb00ea35 | 2215 | if (bytes) { |
3bf25cb4 | 2216 | brelse(bh); |
97e961fd | 2217 | newblock = udf_get_lb_pblock(sb, &loc, ++block); |
1da177e4 | 2218 | bh = udf_tread(sb, newblock); |
cb00ea35 | 2219 | if (!bh) { |
1da177e4 LT |
2220 | udf_debug("read failed\n"); |
2221 | goto out; | |
2222 | } | |
2223 | index = 0; | |
28de7948 | 2224 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2225 | } |
2226 | } | |
3bf25cb4 | 2227 | brelse(bh); |
1da177e4 | 2228 | |
28de7948 | 2229 | out: |
1da177e4 LT |
2230 | unlock_kernel(); |
2231 | ||
2232 | return accum; | |
2233 | } | |
2234 | ||
4b11111a MS |
2235 | static unsigned int udf_count_free_table(struct super_block *sb, |
2236 | struct inode *table) | |
1da177e4 LT |
2237 | { |
2238 | unsigned int accum = 0; | |
ff116fc8 | 2239 | uint32_t elen; |
5ca4e4be | 2240 | struct kernel_lb_addr eloc; |
1da177e4 | 2241 | int8_t etype; |
ff116fc8 | 2242 | struct extent_position epos; |
1da177e4 LT |
2243 | |
2244 | lock_kernel(); | |
2245 | ||
c0b34438 | 2246 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2247 | epos.offset = sizeof(struct unallocSpaceEntry); |
2248 | epos.bh = NULL; | |
1da177e4 | 2249 | |
3a71fc5d | 2250 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2251 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2252 | |
3bf25cb4 | 2253 | brelse(epos.bh); |
1da177e4 LT |
2254 | |
2255 | unlock_kernel(); | |
2256 | ||
2257 | return accum; | |
2258 | } | |
cb00ea35 CG |
2259 | |
2260 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2261 | { |
2262 | unsigned int accum = 0; | |
6c79e987 MS |
2263 | struct udf_sb_info *sbi; |
2264 | struct udf_part_map *map; | |
1da177e4 | 2265 | |
6c79e987 MS |
2266 | sbi = UDF_SB(sb); |
2267 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2268 | struct logicalVolIntegrityDesc *lvid = |
2269 | (struct logicalVolIntegrityDesc *) | |
2270 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2271 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2272 | accum = le32_to_cpu( |
2273 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2274 | if (accum == 0xFFFFFFFF) |
2275 | accum = 0; | |
2276 | } | |
2277 | } | |
2278 | ||
2279 | if (accum) | |
2280 | return accum; | |
2281 | ||
6c79e987 MS |
2282 | map = &sbi->s_partmaps[sbi->s_partition]; |
2283 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2284 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2285 | map->s_uspace.s_bitmap); |
1da177e4 | 2286 | } |
6c79e987 | 2287 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
28de7948 | 2288 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2289 | map->s_fspace.s_bitmap); |
1da177e4 LT |
2290 | } |
2291 | if (accum) | |
2292 | return accum; | |
2293 | ||
6c79e987 | 2294 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2295 | accum += udf_count_free_table(sb, |
6c79e987 | 2296 | map->s_uspace.s_table); |
1da177e4 | 2297 | } |
6c79e987 | 2298 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
28de7948 | 2299 | accum += udf_count_free_table(sb, |
6c79e987 | 2300 | map->s_fspace.s_table); |
1da177e4 LT |
2301 | } |
2302 | ||
2303 | return accum; | |
2304 | } |