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 MS |
56 | #include <linux/mount.h> |
57 | #include <linux/seq_file.h> | |
01b954a3 | 58 | #include <linux/bitmap.h> |
f845fced | 59 | #include <linux/crc-itu-t.h> |
1da177e4 LT |
60 | #include <asm/byteorder.h> |
61 | ||
1da177e4 LT |
62 | #include "udf_sb.h" |
63 | #include "udf_i.h" | |
64 | ||
65 | #include <linux/init.h> | |
66 | #include <asm/uaccess.h> | |
67 | ||
68 | #define VDS_POS_PRIMARY_VOL_DESC 0 | |
69 | #define VDS_POS_UNALLOC_SPACE_DESC 1 | |
70 | #define VDS_POS_LOGICAL_VOL_DESC 2 | |
71 | #define VDS_POS_PARTITION_DESC 3 | |
72 | #define VDS_POS_IMP_USE_VOL_DESC 4 | |
73 | #define VDS_POS_VOL_DESC_PTR 5 | |
74 | #define VDS_POS_TERMINATING_DESC 6 | |
75 | #define VDS_POS_LENGTH 7 | |
76 | ||
6da80894 MS |
77 | #define UDF_DEFAULT_BLOCKSIZE 2048 |
78 | ||
1da177e4 LT |
79 | static char error_buf[1024]; |
80 | ||
81 | /* These are the "meat" - everything else is stuffing */ | |
82 | static int udf_fill_super(struct super_block *, void *, int); | |
83 | static void udf_put_super(struct super_block *); | |
84 | static void udf_write_super(struct super_block *); | |
85 | static int udf_remount_fs(struct super_block *, int *, char *); | |
86 | static int udf_check_valid(struct super_block *, int, int); | |
87 | static int udf_vrs(struct super_block *sb, int silent); | |
1da177e4 LT |
88 | static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad); |
89 | static void udf_find_anchor(struct super_block *); | |
cb00ea35 CG |
90 | static int udf_find_fileset(struct super_block *, kernel_lb_addr *, |
91 | kernel_lb_addr *); | |
cb00ea35 CG |
92 | static void udf_load_fileset(struct super_block *, struct buffer_head *, |
93 | kernel_lb_addr *); | |
1da177e4 LT |
94 | static void udf_open_lvid(struct super_block *); |
95 | static void udf_close_lvid(struct super_block *); | |
96 | static unsigned int udf_count_free(struct super_block *); | |
726c3342 | 97 | static int udf_statfs(struct dentry *, struct kstatfs *); |
6da80894 | 98 | static int udf_show_options(struct seq_file *, struct vfsmount *); |
b8145a76 AB |
99 | static void udf_error(struct super_block *sb, const char *function, |
100 | const char *fmt, ...); | |
1da177e4 | 101 | |
6c79e987 MS |
102 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) |
103 | { | |
4b11111a MS |
104 | struct logicalVolIntegrityDesc *lvid = |
105 | (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; | |
6c79e987 | 106 | __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); |
4b11111a MS |
107 | __u32 offset = number_of_partitions * 2 * |
108 | sizeof(uint32_t)/sizeof(uint8_t); | |
6c79e987 MS |
109 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
110 | } | |
111 | ||
1da177e4 | 112 | /* UDF filesystem type */ |
454e2398 | 113 | static int udf_get_sb(struct file_system_type *fs_type, |
cb00ea35 CG |
114 | int flags, const char *dev_name, void *data, |
115 | struct vfsmount *mnt) | |
1da177e4 | 116 | { |
454e2398 | 117 | return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt); |
1da177e4 LT |
118 | } |
119 | ||
120 | static struct file_system_type udf_fstype = { | |
28de7948 CG |
121 | .owner = THIS_MODULE, |
122 | .name = "udf", | |
123 | .get_sb = udf_get_sb, | |
124 | .kill_sb = kill_block_super, | |
125 | .fs_flags = FS_REQUIRES_DEV, | |
1da177e4 LT |
126 | }; |
127 | ||
cb00ea35 | 128 | static struct kmem_cache *udf_inode_cachep; |
1da177e4 LT |
129 | |
130 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
131 | { | |
132 | struct udf_inode_info *ei; | |
3a71fc5d | 133 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
134 | if (!ei) |
135 | return NULL; | |
95f8797f DB |
136 | |
137 | ei->i_unique = 0; | |
138 | ei->i_lenExtents = 0; | |
139 | ei->i_next_alloc_block = 0; | |
140 | ei->i_next_alloc_goal = 0; | |
141 | ei->i_strat4096 = 0; | |
142 | ||
1da177e4 LT |
143 | return &ei->vfs_inode; |
144 | } | |
145 | ||
146 | static void udf_destroy_inode(struct inode *inode) | |
147 | { | |
148 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); | |
149 | } | |
150 | ||
51cc5068 | 151 | static void init_once(void *foo) |
1da177e4 | 152 | { |
cb00ea35 | 153 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 154 | |
a35afb83 CL |
155 | ei->i_ext.i_data = NULL; |
156 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
157 | } |
158 | ||
159 | static int init_inodecache(void) | |
160 | { | |
161 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
162 | sizeof(struct udf_inode_info), | |
cb00ea35 CG |
163 | 0, (SLAB_RECLAIM_ACCOUNT | |
164 | SLAB_MEM_SPREAD), | |
20c2df83 | 165 | init_once); |
28de7948 | 166 | if (!udf_inode_cachep) |
1da177e4 LT |
167 | return -ENOMEM; |
168 | return 0; | |
169 | } | |
170 | ||
171 | static void destroy_inodecache(void) | |
172 | { | |
1a1d92c1 | 173 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
174 | } |
175 | ||
176 | /* Superblock operations */ | |
ee9b6d61 | 177 | static const struct super_operations udf_sb_ops = { |
28de7948 CG |
178 | .alloc_inode = udf_alloc_inode, |
179 | .destroy_inode = udf_destroy_inode, | |
180 | .write_inode = udf_write_inode, | |
181 | .delete_inode = udf_delete_inode, | |
182 | .clear_inode = udf_clear_inode, | |
183 | .put_super = udf_put_super, | |
184 | .write_super = udf_write_super, | |
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; | |
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"); | |
261 | if (sb->s_blocksize != UDF_DEFAULT_BLOCKSIZE) | |
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); | |
285 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) | |
286 | seq_printf(seq, ",session=%u", sbi->s_session); | |
287 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) | |
288 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
289 | /* | |
290 | * s_anchor[2] could be zeroed out in case there is no anchor | |
291 | * in the specified block, but then the "anchor=N" option | |
292 | * originally given by the user wasn't effective, so it's OK | |
293 | * if we don't show it. | |
294 | */ | |
295 | if (sbi->s_anchor[2] != 0) | |
296 | seq_printf(seq, ",anchor=%u", sbi->s_anchor[2]); | |
297 | /* | |
298 | * volume, partition, fileset and rootdir seem to be ignored | |
299 | * currently | |
300 | */ | |
301 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) | |
302 | seq_puts(seq, ",utf8"); | |
303 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
304 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
1da177e4 LT |
309 | /* |
310 | * udf_parse_options | |
311 | * | |
312 | * PURPOSE | |
313 | * Parse mount options. | |
314 | * | |
315 | * DESCRIPTION | |
316 | * The following mount options are supported: | |
317 | * | |
318 | * gid= Set the default group. | |
319 | * umask= Set the default umask. | |
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, | |
4d6660eb | 369 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore |
1da177e4 LT |
370 | }; |
371 | ||
a447c093 | 372 | static const match_table_t tokens = { |
28de7948 CG |
373 | {Opt_novrs, "novrs"}, |
374 | {Opt_nostrict, "nostrict"}, | |
375 | {Opt_bs, "bs=%u"}, | |
376 | {Opt_unhide, "unhide"}, | |
377 | {Opt_undelete, "undelete"}, | |
378 | {Opt_noadinicb, "noadinicb"}, | |
379 | {Opt_adinicb, "adinicb"}, | |
380 | {Opt_shortad, "shortad"}, | |
381 | {Opt_longad, "longad"}, | |
382 | {Opt_uforget, "uid=forget"}, | |
383 | {Opt_uignore, "uid=ignore"}, | |
384 | {Opt_gforget, "gid=forget"}, | |
385 | {Opt_gignore, "gid=ignore"}, | |
386 | {Opt_gid, "gid=%u"}, | |
387 | {Opt_uid, "uid=%u"}, | |
388 | {Opt_umask, "umask=%o"}, | |
389 | {Opt_session, "session=%u"}, | |
390 | {Opt_lastblock, "lastblock=%u"}, | |
391 | {Opt_anchor, "anchor=%u"}, | |
392 | {Opt_volume, "volume=%u"}, | |
393 | {Opt_partition, "partition=%u"}, | |
394 | {Opt_fileset, "fileset=%u"}, | |
395 | {Opt_rootdir, "rootdir=%u"}, | |
396 | {Opt_utf8, "utf8"}, | |
397 | {Opt_iocharset, "iocharset=%s"}, | |
398 | {Opt_err, NULL} | |
1da177e4 LT |
399 | }; |
400 | ||
6da80894 MS |
401 | static int udf_parse_options(char *options, struct udf_options *uopt, |
402 | bool remount) | |
1da177e4 LT |
403 | { |
404 | char *p; | |
405 | int option; | |
406 | ||
407 | uopt->novrs = 0; | |
6da80894 | 408 | uopt->blocksize = UDF_DEFAULT_BLOCKSIZE; |
1da177e4 LT |
409 | uopt->partition = 0xFFFF; |
410 | uopt->session = 0xFFFFFFFF; | |
411 | uopt->lastblock = 0; | |
412 | uopt->anchor = 0; | |
413 | uopt->volume = 0xFFFFFFFF; | |
414 | uopt->rootdir = 0xFFFFFFFF; | |
415 | uopt->fileset = 0xFFFFFFFF; | |
416 | uopt->nls_map = NULL; | |
417 | ||
418 | if (!options) | |
419 | return 1; | |
420 | ||
cb00ea35 | 421 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
422 | substring_t args[MAX_OPT_ARGS]; |
423 | int token; | |
424 | if (!*p) | |
425 | continue; | |
426 | ||
427 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
428 | switch (token) { |
429 | case Opt_novrs: | |
430 | uopt->novrs = 1; | |
431 | case Opt_bs: | |
432 | if (match_int(&args[0], &option)) | |
433 | return 0; | |
434 | uopt->blocksize = option; | |
435 | break; | |
436 | case Opt_unhide: | |
437 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
438 | break; | |
439 | case Opt_undelete: | |
440 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
441 | break; | |
442 | case Opt_noadinicb: | |
443 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
444 | break; | |
445 | case Opt_adinicb: | |
446 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
447 | break; | |
448 | case Opt_shortad: | |
449 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
450 | break; | |
451 | case Opt_longad: | |
452 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
453 | break; | |
454 | case Opt_gid: | |
455 | if (match_int(args, &option)) | |
456 | return 0; | |
457 | uopt->gid = option; | |
ca76d2d8 | 458 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
459 | break; |
460 | case Opt_uid: | |
461 | if (match_int(args, &option)) | |
462 | return 0; | |
463 | uopt->uid = option; | |
ca76d2d8 | 464 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
465 | break; |
466 | case Opt_umask: | |
467 | if (match_octal(args, &option)) | |
468 | return 0; | |
469 | uopt->umask = option; | |
470 | break; | |
471 | case Opt_nostrict: | |
472 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
473 | break; | |
474 | case Opt_session: | |
475 | if (match_int(args, &option)) | |
476 | return 0; | |
477 | uopt->session = option; | |
6da80894 MS |
478 | if (!remount) |
479 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
480 | break; |
481 | case Opt_lastblock: | |
482 | if (match_int(args, &option)) | |
483 | return 0; | |
484 | uopt->lastblock = option; | |
6da80894 MS |
485 | if (!remount) |
486 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
487 | break; |
488 | case Opt_anchor: | |
489 | if (match_int(args, &option)) | |
490 | return 0; | |
491 | uopt->anchor = option; | |
492 | break; | |
493 | case Opt_volume: | |
494 | if (match_int(args, &option)) | |
495 | return 0; | |
496 | uopt->volume = option; | |
497 | break; | |
498 | case Opt_partition: | |
499 | if (match_int(args, &option)) | |
500 | return 0; | |
501 | uopt->partition = option; | |
502 | break; | |
503 | case Opt_fileset: | |
504 | if (match_int(args, &option)) | |
505 | return 0; | |
506 | uopt->fileset = option; | |
507 | break; | |
508 | case Opt_rootdir: | |
509 | if (match_int(args, &option)) | |
510 | return 0; | |
511 | uopt->rootdir = option; | |
512 | break; | |
513 | case Opt_utf8: | |
514 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
515 | break; | |
1da177e4 | 516 | #ifdef CONFIG_UDF_NLS |
cb00ea35 CG |
517 | case Opt_iocharset: |
518 | uopt->nls_map = load_nls(args[0].from); | |
519 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
520 | break; | |
1da177e4 | 521 | #endif |
cb00ea35 CG |
522 | case Opt_uignore: |
523 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); | |
524 | break; | |
525 | case Opt_uforget: | |
526 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
527 | break; | |
528 | case Opt_gignore: | |
529 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); | |
530 | break; | |
531 | case Opt_gforget: | |
532 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
533 | break; | |
534 | default: | |
535 | printk(KERN_ERR "udf: bad mount option \"%s\" " | |
536 | "or missing value\n", p); | |
1da177e4 LT |
537 | return 0; |
538 | } | |
539 | } | |
540 | return 1; | |
541 | } | |
542 | ||
bd45a420 | 543 | static void udf_write_super(struct super_block *sb) |
1da177e4 LT |
544 | { |
545 | lock_kernel(); | |
28de7948 | 546 | |
1da177e4 LT |
547 | if (!(sb->s_flags & MS_RDONLY)) |
548 | udf_open_lvid(sb); | |
549 | sb->s_dirt = 0; | |
28de7948 | 550 | |
1da177e4 LT |
551 | unlock_kernel(); |
552 | } | |
553 | ||
cb00ea35 | 554 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
555 | { |
556 | struct udf_options uopt; | |
6c79e987 | 557 | struct udf_sb_info *sbi = UDF_SB(sb); |
1da177e4 | 558 | |
6c79e987 MS |
559 | uopt.flags = sbi->s_flags; |
560 | uopt.uid = sbi->s_uid; | |
561 | uopt.gid = sbi->s_gid; | |
562 | uopt.umask = sbi->s_umask; | |
1da177e4 | 563 | |
6da80894 | 564 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
565 | return -EINVAL; |
566 | ||
6c79e987 MS |
567 | sbi->s_flags = uopt.flags; |
568 | sbi->s_uid = uopt.uid; | |
569 | sbi->s_gid = uopt.gid; | |
570 | sbi->s_umask = uopt.umask; | |
1da177e4 | 571 | |
6c79e987 MS |
572 | if (sbi->s_lvid_bh) { |
573 | int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); | |
1da177e4 LT |
574 | if (write_rev > UDF_MAX_WRITE_VERSION) |
575 | *flags |= MS_RDONLY; | |
576 | } | |
577 | ||
578 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
579 | return 0; | |
580 | if (*flags & MS_RDONLY) | |
581 | udf_close_lvid(sb); | |
582 | else | |
583 | udf_open_lvid(sb); | |
584 | ||
585 | return 0; | |
586 | } | |
587 | ||
cb00ea35 | 588 | static int udf_vrs(struct super_block *sb, int silent) |
1da177e4 LT |
589 | { |
590 | struct volStructDesc *vsd = NULL; | |
f4bcbbd9 | 591 | loff_t sector = 32768; |
1da177e4 LT |
592 | int sectorsize; |
593 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
594 | int iso9660 = 0; |
595 | int nsr02 = 0; | |
596 | int nsr03 = 0; | |
6c79e987 | 597 | struct udf_sb_info *sbi; |
1da177e4 LT |
598 | |
599 | /* Block size must be a multiple of 512 */ | |
600 | if (sb->s_blocksize & 511) | |
601 | return 0; | |
6c79e987 | 602 | sbi = UDF_SB(sb); |
1da177e4 LT |
603 | |
604 | if (sb->s_blocksize < sizeof(struct volStructDesc)) | |
605 | sectorsize = sizeof(struct volStructDesc); | |
606 | else | |
607 | sectorsize = sb->s_blocksize; | |
608 | ||
6c79e987 | 609 | sector += (sbi->s_session << sb->s_blocksize_bits); |
1da177e4 LT |
610 | |
611 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
706047a7 SM |
612 | (unsigned int)(sector >> sb->s_blocksize_bits), |
613 | sb->s_blocksize); | |
1da177e4 | 614 | /* Process the sequence (if applicable) */ |
cb00ea35 | 615 | for (; !nsr02 && !nsr03; sector += sectorsize) { |
1da177e4 LT |
616 | /* Read a block */ |
617 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
618 | if (!bh) | |
619 | break; | |
620 | ||
621 | /* Look for ISO descriptors */ | |
622 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 623 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 624 | |
cb00ea35 | 625 | if (vsd->stdIdent[0] == 0) { |
3bf25cb4 | 626 | brelse(bh); |
1da177e4 | 627 | break; |
3a71fc5d MS |
628 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
629 | VSD_STD_ID_LEN)) { | |
1da177e4 | 630 | iso9660 = sector; |
cb00ea35 CG |
631 | switch (vsd->structType) { |
632 | case 0: | |
633 | udf_debug("ISO9660 Boot Record found\n"); | |
634 | break; | |
635 | case 1: | |
3a71fc5d MS |
636 | udf_debug("ISO9660 Primary Volume Descriptor " |
637 | "found\n"); | |
cb00ea35 CG |
638 | break; |
639 | case 2: | |
3a71fc5d MS |
640 | udf_debug("ISO9660 Supplementary Volume " |
641 | "Descriptor found\n"); | |
cb00ea35 CG |
642 | break; |
643 | case 3: | |
3a71fc5d MS |
644 | udf_debug("ISO9660 Volume Partition Descriptor " |
645 | "found\n"); | |
cb00ea35 CG |
646 | break; |
647 | case 255: | |
3a71fc5d MS |
648 | udf_debug("ISO9660 Volume Descriptor Set " |
649 | "Terminator found\n"); | |
cb00ea35 CG |
650 | break; |
651 | default: | |
652 | udf_debug("ISO9660 VRS (%u) found\n", | |
653 | vsd->structType); | |
654 | break; | |
1da177e4 | 655 | } |
3a71fc5d MS |
656 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
657 | VSD_STD_ID_LEN)) | |
658 | ; /* nothing */ | |
659 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
660 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 661 | brelse(bh); |
1da177e4 | 662 | break; |
3a71fc5d MS |
663 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
664 | VSD_STD_ID_LEN)) | |
1da177e4 | 665 | nsr02 = sector; |
3a71fc5d MS |
666 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
667 | VSD_STD_ID_LEN)) | |
1da177e4 | 668 | nsr03 = sector; |
3bf25cb4 | 669 | brelse(bh); |
1da177e4 LT |
670 | } |
671 | ||
672 | if (nsr03) | |
673 | return nsr03; | |
674 | else if (nsr02) | |
675 | return nsr02; | |
6c79e987 | 676 | else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) |
1da177e4 LT |
677 | return -1; |
678 | else | |
679 | return 0; | |
680 | } | |
681 | ||
682 | /* | |
423cf6dc | 683 | * Check whether there is an anchor block in the given block |
1da177e4 | 684 | */ |
e8183c24 | 685 | static int udf_check_anchor_block(struct super_block *sb, sector_t block) |
1da177e4 | 686 | { |
e8183c24 | 687 | struct buffer_head *bh; |
1da177e4 | 688 | uint16_t ident; |
423cf6dc | 689 | |
e8183c24 TJ |
690 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
691 | udf_fixed_to_variable(block) >= | |
692 | sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) | |
693 | return 0; | |
423cf6dc | 694 | |
e8183c24 | 695 | bh = udf_read_tagged(sb, block, block, &ident); |
423cf6dc JK |
696 | if (!bh) |
697 | return 0; | |
423cf6dc | 698 | brelse(bh); |
e8183c24 TJ |
699 | |
700 | return ident == TAG_IDENT_AVDP; | |
423cf6dc JK |
701 | } |
702 | ||
703 | /* Search for an anchor volume descriptor pointer */ | |
e8183c24 | 704 | static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock) |
423cf6dc | 705 | { |
5fb28aa2 | 706 | sector_t last[6]; |
1da177e4 | 707 | int i; |
423cf6dc | 708 | struct udf_sb_info *sbi = UDF_SB(sb); |
6c79e987 | 709 | |
423cf6dc | 710 | last[0] = lastblock; |
5fb28aa2 JK |
711 | last[1] = last[0] - 1; |
712 | last[2] = last[0] + 1; | |
713 | last[3] = last[0] - 2; | |
714 | last[4] = last[0] - 150; | |
715 | last[5] = last[0] - 152; | |
1da177e4 | 716 | |
423cf6dc JK |
717 | /* according to spec, anchor is in either: |
718 | * block 256 | |
719 | * lastblock-256 | |
720 | * lastblock | |
721 | * however, if the disc isn't closed, it could be 512 */ | |
e8c96f8c | 722 | |
423cf6dc JK |
723 | for (i = 0; i < ARRAY_SIZE(last); i++) { |
724 | if (last[i] < 0) | |
725 | continue; | |
5fb28aa2 JK |
726 | if (last[i] >= sb->s_bdev->bd_inode->i_size >> |
727 | sb->s_blocksize_bits) | |
728 | continue; | |
cb00ea35 | 729 | |
e8183c24 | 730 | if (udf_check_anchor_block(sb, last[i])) { |
423cf6dc JK |
731 | sbi->s_anchor[0] = last[i]; |
732 | sbi->s_anchor[1] = last[i] - 256; | |
733 | return last[i]; | |
734 | } | |
cb00ea35 | 735 | |
423cf6dc JK |
736 | if (last[i] < 256) |
737 | continue; | |
738 | ||
e8183c24 | 739 | if (udf_check_anchor_block(sb, last[i] - 256)) { |
423cf6dc JK |
740 | sbi->s_anchor[1] = last[i] - 256; |
741 | return last[i]; | |
1da177e4 LT |
742 | } |
743 | } | |
744 | ||
e8183c24 | 745 | if (udf_check_anchor_block(sb, sbi->s_session + 256)) { |
423cf6dc JK |
746 | sbi->s_anchor[0] = sbi->s_session + 256; |
747 | return last[0]; | |
748 | } | |
e8183c24 | 749 | if (udf_check_anchor_block(sb, sbi->s_session + 512)) { |
423cf6dc JK |
750 | sbi->s_anchor[0] = sbi->s_session + 512; |
751 | return last[0]; | |
752 | } | |
753 | return 0; | |
754 | } | |
1da177e4 | 755 | |
423cf6dc JK |
756 | /* |
757 | * Find an anchor volume descriptor. The function expects sbi->s_lastblock to | |
758 | * be the last block on the media. | |
759 | * | |
760 | * Return 1 if not found, 0 if ok | |
761 | * | |
762 | */ | |
763 | static void udf_find_anchor(struct super_block *sb) | |
764 | { | |
765 | sector_t lastblock; | |
766 | struct buffer_head *bh = NULL; | |
767 | uint16_t ident; | |
768 | int i; | |
769 | struct udf_sb_info *sbi = UDF_SB(sb); | |
770 | ||
e8183c24 | 771 | lastblock = udf_scan_anchors(sb, sbi->s_last_block); |
423cf6dc JK |
772 | if (lastblock) |
773 | goto check_anchor; | |
774 | ||
775 | /* No anchor found? Try VARCONV conversion of block numbers */ | |
e8183c24 | 776 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); |
423cf6dc | 777 | /* Firstly, we try to not convert number of the last block */ |
e8183c24 | 778 | lastblock = udf_scan_anchors(sb, |
423cf6dc | 779 | udf_variable_to_fixed(sbi->s_last_block)); |
e8183c24 | 780 | if (lastblock) |
423cf6dc | 781 | goto check_anchor; |
1da177e4 | 782 | |
423cf6dc | 783 | /* Secondly, we try with converted number of the last block */ |
e8183c24 TJ |
784 | lastblock = udf_scan_anchors(sb, sbi->s_last_block); |
785 | if (!lastblock) { | |
786 | /* VARCONV didn't help. Clear it. */ | |
787 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); | |
788 | } | |
423cf6dc JK |
789 | |
790 | check_anchor: | |
791 | /* | |
792 | * Check located anchors and the anchor block supplied via | |
793 | * mount options | |
794 | */ | |
6c79e987 | 795 | for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) { |
165923fa MS |
796 | if (!sbi->s_anchor[i]) |
797 | continue; | |
798 | bh = udf_read_tagged(sb, sbi->s_anchor[i], | |
799 | sbi->s_anchor[i], &ident); | |
800 | if (!bh) | |
801 | sbi->s_anchor[i] = 0; | |
802 | else { | |
803 | brelse(bh); | |
423cf6dc | 804 | if (ident != TAG_IDENT_AVDP) |
6c79e987 | 805 | sbi->s_anchor[i] = 0; |
1da177e4 LT |
806 | } |
807 | } | |
808 | ||
6c79e987 | 809 | sbi->s_last_block = lastblock; |
1da177e4 LT |
810 | } |
811 | ||
3a71fc5d MS |
812 | static int udf_find_fileset(struct super_block *sb, |
813 | kernel_lb_addr *fileset, | |
814 | kernel_lb_addr *root) | |
1da177e4 LT |
815 | { |
816 | struct buffer_head *bh = NULL; | |
817 | long lastblock; | |
818 | uint16_t ident; | |
6c79e987 | 819 | struct udf_sb_info *sbi; |
1da177e4 LT |
820 | |
821 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 822 | fileset->partitionReferenceNum != 0xFFFF) { |
1da177e4 LT |
823 | bh = udf_read_ptagged(sb, *fileset, 0, &ident); |
824 | ||
28de7948 | 825 | if (!bh) { |
1da177e4 | 826 | return 1; |
28de7948 | 827 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 828 | brelse(bh); |
1da177e4 LT |
829 | return 1; |
830 | } | |
cb00ea35 | 831 | |
1da177e4 LT |
832 | } |
833 | ||
6c79e987 | 834 | sbi = UDF_SB(sb); |
3a71fc5d MS |
835 | if (!bh) { |
836 | /* Search backwards through the partitions */ | |
1da177e4 LT |
837 | kernel_lb_addr newfileset; |
838 | ||
28de7948 | 839 | /* --> cvg: FIXME - is it reasonable? */ |
1da177e4 | 840 | return 1; |
cb00ea35 | 841 | |
6c79e987 | 842 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
cb00ea35 CG |
843 | (newfileset.partitionReferenceNum != 0xFFFF && |
844 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
845 | fileset->partitionReferenceNum == 0xFFFF); | |
846 | newfileset.partitionReferenceNum--) { | |
6c79e987 MS |
847 | lastblock = sbi->s_partmaps |
848 | [newfileset.partitionReferenceNum] | |
849 | .s_partition_len; | |
1da177e4 LT |
850 | newfileset.logicalBlockNum = 0; |
851 | ||
cb00ea35 | 852 | do { |
3a71fc5d MS |
853 | bh = udf_read_ptagged(sb, newfileset, 0, |
854 | &ident); | |
cb00ea35 CG |
855 | if (!bh) { |
856 | newfileset.logicalBlockNum++; | |
1da177e4 LT |
857 | continue; |
858 | } | |
859 | ||
cb00ea35 CG |
860 | switch (ident) { |
861 | case TAG_IDENT_SBD: | |
28de7948 CG |
862 | { |
863 | struct spaceBitmapDesc *sp; | |
4b11111a MS |
864 | sp = (struct spaceBitmapDesc *) |
865 | bh->b_data; | |
28de7948 CG |
866 | newfileset.logicalBlockNum += 1 + |
867 | ((le32_to_cpu(sp->numOfBytes) + | |
4b11111a MS |
868 | sizeof(struct spaceBitmapDesc) |
869 | - 1) >> sb->s_blocksize_bits); | |
28de7948 CG |
870 | brelse(bh); |
871 | break; | |
872 | } | |
cb00ea35 | 873 | case TAG_IDENT_FSD: |
28de7948 CG |
874 | *fileset = newfileset; |
875 | break; | |
cb00ea35 | 876 | default: |
28de7948 CG |
877 | newfileset.logicalBlockNum++; |
878 | brelse(bh); | |
879 | bh = NULL; | |
880 | break; | |
1da177e4 | 881 | } |
28de7948 CG |
882 | } while (newfileset.logicalBlockNum < lastblock && |
883 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
884 | fileset->partitionReferenceNum == 0xFFFF); | |
1da177e4 LT |
885 | } |
886 | } | |
887 | ||
888 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 889 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
1da177e4 | 890 | udf_debug("Fileset at block=%d, partition=%d\n", |
cb00ea35 CG |
891 | fileset->logicalBlockNum, |
892 | fileset->partitionReferenceNum); | |
1da177e4 | 893 | |
6c79e987 | 894 | sbi->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 895 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 896 | brelse(bh); |
1da177e4 LT |
897 | return 0; |
898 | } | |
899 | return 1; | |
900 | } | |
901 | ||
c0eb31ed | 902 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
903 | { |
904 | struct primaryVolDesc *pvoldesc; | |
1da177e4 LT |
905 | struct ustr instr; |
906 | struct ustr outstr; | |
c0eb31ed JK |
907 | struct buffer_head *bh; |
908 | uint16_t ident; | |
909 | ||
910 | bh = udf_read_tagged(sb, block, block, &ident); | |
911 | if (!bh) | |
912 | return 1; | |
913 | BUG_ON(ident != TAG_IDENT_PVD); | |
1da177e4 LT |
914 | |
915 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
916 | ||
56774805 MS |
917 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
918 | pvoldesc->recordingDateAndTime)) { | |
af15a298 MS |
919 | #ifdef UDFFS_DEBUG |
920 | timestamp *ts = &pvoldesc->recordingDateAndTime; | |
cbf5676a | 921 | udf_debug("recording time %04u/%02u/%02u" |
3a71fc5d | 922 | " %02u:%02u (%x)\n", |
af15a298 MS |
923 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, |
924 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
925 | #endif | |
1da177e4 LT |
926 | } |
927 | ||
4b11111a | 928 | if (!udf_build_ustr(&instr, pvoldesc->volIdent, 32)) |
cb00ea35 | 929 | if (udf_CS0toUTF8(&outstr, &instr)) { |
6c79e987 | 930 | strncpy(UDF_SB(sb)->s_volume_ident, outstr.u_name, |
1da177e4 | 931 | outstr.u_len > 31 ? 31 : outstr.u_len); |
4b11111a MS |
932 | udf_debug("volIdent[] = '%s'\n", |
933 | UDF_SB(sb)->s_volume_ident); | |
1da177e4 | 934 | } |
1da177e4 | 935 | |
4b11111a | 936 | if (!udf_build_ustr(&instr, pvoldesc->volSetIdent, 128)) |
1da177e4 LT |
937 | if (udf_CS0toUTF8(&outstr, &instr)) |
938 | udf_debug("volSetIdent[] = '%s'\n", outstr.u_name); | |
c0eb31ed JK |
939 | |
940 | brelse(bh); | |
941 | return 0; | |
1da177e4 LT |
942 | } |
943 | ||
bfb257a5 JK |
944 | static int udf_load_metadata_files(struct super_block *sb, int partition) |
945 | { | |
946 | struct udf_sb_info *sbi = UDF_SB(sb); | |
947 | struct udf_part_map *map; | |
948 | struct udf_meta_data *mdata; | |
949 | kernel_lb_addr addr; | |
950 | int fe_error = 0; | |
951 | ||
952 | map = &sbi->s_partmaps[partition]; | |
953 | mdata = &map->s_type_specific.s_metadata; | |
954 | ||
955 | /* metadata address */ | |
956 | addr.logicalBlockNum = mdata->s_meta_file_loc; | |
957 | addr.partitionReferenceNum = map->s_partition_num; | |
958 | ||
959 | udf_debug("Metadata file location: block = %d part = %d\n", | |
960 | addr.logicalBlockNum, addr.partitionReferenceNum); | |
961 | ||
962 | mdata->s_metadata_fe = udf_iget(sb, addr); | |
963 | ||
964 | if (mdata->s_metadata_fe == NULL) { | |
965 | udf_warning(sb, __func__, "metadata inode efe not found, " | |
966 | "will try mirror inode."); | |
967 | fe_error = 1; | |
968 | } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type != | |
969 | ICBTAG_FLAG_AD_SHORT) { | |
970 | udf_warning(sb, __func__, "metadata inode efe does not have " | |
971 | "short allocation descriptors!"); | |
972 | fe_error = 1; | |
973 | iput(mdata->s_metadata_fe); | |
974 | mdata->s_metadata_fe = NULL; | |
975 | } | |
976 | ||
977 | /* mirror file entry */ | |
978 | addr.logicalBlockNum = mdata->s_mirror_file_loc; | |
979 | addr.partitionReferenceNum = map->s_partition_num; | |
980 | ||
981 | udf_debug("Mirror metadata file location: block = %d part = %d\n", | |
982 | addr.logicalBlockNum, addr.partitionReferenceNum); | |
983 | ||
984 | mdata->s_mirror_fe = udf_iget(sb, addr); | |
985 | ||
986 | if (mdata->s_mirror_fe == NULL) { | |
987 | if (fe_error) { | |
988 | udf_error(sb, __func__, "mirror inode efe not found " | |
989 | "and metadata inode is missing too, exiting..."); | |
990 | goto error_exit; | |
991 | } else | |
992 | udf_warning(sb, __func__, "mirror inode efe not found," | |
993 | " but metadata inode is OK"); | |
994 | } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type != | |
995 | ICBTAG_FLAG_AD_SHORT) { | |
996 | udf_warning(sb, __func__, "mirror inode efe does not have " | |
997 | "short allocation descriptors!"); | |
998 | iput(mdata->s_mirror_fe); | |
999 | mdata->s_mirror_fe = NULL; | |
1000 | if (fe_error) | |
1001 | goto error_exit; | |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | * bitmap file entry | |
1006 | * Note: | |
1007 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) | |
1008 | */ | |
1009 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { | |
1010 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; | |
1011 | addr.partitionReferenceNum = map->s_partition_num; | |
1012 | ||
1013 | udf_debug("Bitmap file location: block = %d part = %d\n", | |
1014 | addr.logicalBlockNum, addr.partitionReferenceNum); | |
1015 | ||
1016 | mdata->s_bitmap_fe = udf_iget(sb, addr); | |
1017 | ||
1018 | if (mdata->s_bitmap_fe == NULL) { | |
1019 | if (sb->s_flags & MS_RDONLY) | |
1020 | udf_warning(sb, __func__, "bitmap inode efe " | |
1021 | "not found but it's ok since the disc" | |
1022 | " is mounted read-only"); | |
1023 | else { | |
1024 | udf_error(sb, __func__, "bitmap inode efe not " | |
1025 | "found and attempted read-write mount"); | |
1026 | goto error_exit; | |
1027 | } | |
1028 | } | |
1029 | } | |
1030 | ||
1031 | udf_debug("udf_load_metadata_files Ok\n"); | |
1032 | ||
1033 | return 0; | |
1034 | ||
1035 | error_exit: | |
1036 | return 1; | |
1037 | } | |
1038 | ||
28de7948 CG |
1039 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
1040 | kernel_lb_addr *root) | |
1da177e4 LT |
1041 | { |
1042 | struct fileSetDesc *fset; | |
1043 | ||
1044 | fset = (struct fileSetDesc *)bh->b_data; | |
1045 | ||
1046 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
1047 | ||
6c79e987 | 1048 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 1049 | |
cb00ea35 CG |
1050 | udf_debug("Rootdir at block=%d, partition=%d\n", |
1051 | root->logicalBlockNum, root->partitionReferenceNum); | |
1da177e4 LT |
1052 | } |
1053 | ||
883cb9d1 MS |
1054 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
1055 | { | |
1056 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
1057 | return DIV_ROUND_UP(map->s_partition_len + |
1058 | (sizeof(struct spaceBitmapDesc) << 3), | |
1059 | sb->s_blocksize * 8); | |
883cb9d1 MS |
1060 | } |
1061 | ||
66e1da3f MS |
1062 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
1063 | { | |
66e1da3f MS |
1064 | struct udf_bitmap *bitmap; |
1065 | int nr_groups; | |
1066 | int size; | |
1067 | ||
883cb9d1 | 1068 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
1069 | size = sizeof(struct udf_bitmap) + |
1070 | (sizeof(struct buffer_head *) * nr_groups); | |
1071 | ||
1072 | if (size <= PAGE_SIZE) | |
1073 | bitmap = kmalloc(size, GFP_KERNEL); | |
1074 | else | |
1075 | bitmap = vmalloc(size); /* TODO: get rid of vmalloc */ | |
1076 | ||
1077 | if (bitmap == NULL) { | |
8e24eea7 | 1078 | udf_error(sb, __func__, |
66e1da3f MS |
1079 | "Unable to allocate space for bitmap " |
1080 | "and %d buffer_head pointers", nr_groups); | |
1081 | return NULL; | |
1082 | } | |
1083 | ||
1084 | memset(bitmap, 0x00, size); | |
1085 | bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); | |
1086 | bitmap->s_nr_groups = nr_groups; | |
1087 | return bitmap; | |
1088 | } | |
1089 | ||
3fb38dfa JK |
1090 | static int udf_fill_partdesc_info(struct super_block *sb, |
1091 | struct partitionDesc *p, int p_index) | |
1da177e4 | 1092 | { |
6c79e987 | 1093 | struct udf_part_map *map; |
165923fa | 1094 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 1095 | struct partitionHeaderDesc *phd; |
165923fa | 1096 | |
3fb38dfa | 1097 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
1098 | |
1099 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
1100 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
1101 | ||
1102 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
1103 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
1104 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
1105 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
1106 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
1107 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
1108 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
1109 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
1110 | ||
706047a7 SM |
1111 | udf_debug("Partition (%d type %x) starts at physical %d, " |
1112 | "block length %d\n", p_index, | |
165923fa MS |
1113 | map->s_partition_type, map->s_partition_root, |
1114 | map->s_partition_len); | |
1115 | ||
1116 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
1117 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
3fb38dfa | 1118 | return 0; |
165923fa MS |
1119 | |
1120 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1121 | if (phd->unallocSpaceTable.extLength) { | |
1122 | kernel_lb_addr loc = { | |
1123 | .logicalBlockNum = le32_to_cpu( | |
1124 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 1125 | .partitionReferenceNum = p_index, |
165923fa MS |
1126 | }; |
1127 | ||
1128 | map->s_uspace.s_table = udf_iget(sb, loc); | |
1129 | if (!map->s_uspace.s_table) { | |
1130 | udf_debug("cannot load unallocSpaceTable (part %d)\n", | |
3fb38dfa JK |
1131 | p_index); |
1132 | return 1; | |
165923fa MS |
1133 | } |
1134 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; | |
1135 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", | |
3fb38dfa | 1136 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1137 | } |
1138 | ||
1139 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1140 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1141 | if (!bitmap) | |
1142 | return 1; | |
165923fa | 1143 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1144 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1145 | phd->unallocSpaceBitmap.extLength); |
2e0838fd | 1146 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1147 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1148 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
3fb38dfa | 1149 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index, |
2e0838fd | 1150 | bitmap->s_extPosition); |
165923fa MS |
1151 | } |
1152 | ||
1153 | if (phd->partitionIntegrityTable.extLength) | |
3fb38dfa | 1154 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); |
165923fa MS |
1155 | |
1156 | if (phd->freedSpaceTable.extLength) { | |
1157 | kernel_lb_addr loc = { | |
1158 | .logicalBlockNum = le32_to_cpu( | |
1159 | phd->freedSpaceTable.extPosition), | |
3fb38dfa | 1160 | .partitionReferenceNum = p_index, |
165923fa MS |
1161 | }; |
1162 | ||
1163 | map->s_fspace.s_table = udf_iget(sb, loc); | |
1164 | if (!map->s_fspace.s_table) { | |
3fb38dfa JK |
1165 | udf_debug("cannot load freedSpaceTable (part %d)\n", |
1166 | p_index); | |
1167 | return 1; | |
165923fa MS |
1168 | } |
1169 | ||
1170 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; | |
1171 | udf_debug("freedSpaceTable (part %d) @ %ld\n", | |
3fb38dfa | 1172 | p_index, map->s_fspace.s_table->i_ino); |
165923fa MS |
1173 | } |
1174 | ||
1175 | if (phd->freedSpaceBitmap.extLength) { | |
3fb38dfa JK |
1176 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1177 | if (!bitmap) | |
1178 | return 1; | |
165923fa | 1179 | map->s_fspace.s_bitmap = bitmap; |
2e0838fd | 1180 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1181 | phd->freedSpaceBitmap.extLength); |
2e0838fd | 1182 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1183 | phd->freedSpaceBitmap.extPosition); |
2e0838fd | 1184 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
3fb38dfa | 1185 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index, |
2e0838fd | 1186 | bitmap->s_extPosition); |
165923fa | 1187 | } |
3fb38dfa JK |
1188 | return 0; |
1189 | } | |
1190 | ||
38b74a53 JK |
1191 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) |
1192 | { | |
1193 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1194 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
1195 | kernel_lb_addr ino; | |
fa5e0815 JK |
1196 | struct buffer_head *bh = NULL; |
1197 | struct udf_inode_info *vati; | |
1198 | uint32_t pos; | |
1199 | struct virtualAllocationTable20 *vat20; | |
38b74a53 JK |
1200 | |
1201 | /* VAT file entry is in the last recorded block */ | |
1202 | ino.partitionReferenceNum = type1_index; | |
1203 | ino.logicalBlockNum = sbi->s_last_block - map->s_partition_root; | |
1204 | sbi->s_vat_inode = udf_iget(sb, ino); | |
1205 | if (!sbi->s_vat_inode) | |
1206 | return 1; | |
1207 | ||
1208 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
47c9358a | 1209 | map->s_type_specific.s_virtual.s_start_offset = 0; |
38b74a53 JK |
1210 | map->s_type_specific.s_virtual.s_num_entries = |
1211 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1212 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
fa5e0815 JK |
1213 | vati = UDF_I(sbi->s_vat_inode); |
1214 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1215 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1216 | bh = sb_bread(sb, pos); | |
1217 | if (!bh) | |
1218 | return 1; | |
1219 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; | |
1220 | } else { | |
1221 | vat20 = (struct virtualAllocationTable20 *) | |
1222 | vati->i_ext.i_data; | |
1223 | } | |
38b74a53 | 1224 | |
38b74a53 | 1225 | map->s_type_specific.s_virtual.s_start_offset = |
47c9358a | 1226 | le16_to_cpu(vat20->lengthHeader); |
38b74a53 JK |
1227 | map->s_type_specific.s_virtual.s_num_entries = |
1228 | (sbi->s_vat_inode->i_size - | |
1229 | map->s_type_specific.s_virtual. | |
1230 | s_start_offset) >> 2; | |
1231 | brelse(bh); | |
1232 | } | |
1233 | return 0; | |
1234 | } | |
1235 | ||
3fb38dfa JK |
1236 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
1237 | { | |
1238 | struct buffer_head *bh; | |
1239 | struct partitionDesc *p; | |
1240 | struct udf_part_map *map; | |
1241 | struct udf_sb_info *sbi = UDF_SB(sb); | |
38b74a53 | 1242 | int i, type1_idx; |
3fb38dfa JK |
1243 | uint16_t partitionNumber; |
1244 | uint16_t ident; | |
1245 | int ret = 0; | |
1246 | ||
1247 | bh = udf_read_tagged(sb, block, block, &ident); | |
1248 | if (!bh) | |
1249 | return 1; | |
1250 | if (ident != TAG_IDENT_PD) | |
1251 | goto out_bh; | |
1252 | ||
1253 | p = (struct partitionDesc *)bh->b_data; | |
1254 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
38b74a53 | 1255 | |
bfb257a5 | 1256 | /* First scan for TYPE1, SPARABLE and METADATA partitions */ |
3fb38dfa JK |
1257 | for (i = 0; i < sbi->s_partitions; i++) { |
1258 | map = &sbi->s_partmaps[i]; | |
1259 | udf_debug("Searching map: (%d == %d)\n", | |
1260 | map->s_partition_num, partitionNumber); | |
38b74a53 JK |
1261 | if (map->s_partition_num == partitionNumber && |
1262 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1263 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
3fb38dfa JK |
1264 | break; |
1265 | } | |
1266 | ||
38b74a53 | 1267 | if (i >= sbi->s_partitions) { |
3fb38dfa JK |
1268 | udf_debug("Partition (%d) not found in partition map\n", |
1269 | partitionNumber); | |
1270 | goto out_bh; | |
1271 | } | |
165923fa | 1272 | |
3fb38dfa | 1273 | ret = udf_fill_partdesc_info(sb, p, i); |
38b74a53 JK |
1274 | |
1275 | /* | |
bfb257a5 JK |
1276 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
1277 | * PHYSICAL partitions are already set up | |
38b74a53 JK |
1278 | */ |
1279 | type1_idx = i; | |
1280 | for (i = 0; i < sbi->s_partitions; i++) { | |
1281 | map = &sbi->s_partmaps[i]; | |
1282 | ||
1283 | if (map->s_partition_num == partitionNumber && | |
1284 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
bfb257a5 JK |
1285 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
1286 | map->s_partition_type == UDF_METADATA_MAP25)) | |
38b74a53 JK |
1287 | break; |
1288 | } | |
1289 | ||
1290 | if (i >= sbi->s_partitions) | |
1291 | goto out_bh; | |
1292 | ||
1293 | ret = udf_fill_partdesc_info(sb, p, i); | |
1294 | if (ret) | |
1295 | goto out_bh; | |
1296 | ||
bfb257a5 JK |
1297 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
1298 | ret = udf_load_metadata_files(sb, i); | |
1299 | if (ret) { | |
1300 | printk(KERN_ERR "UDF-fs: error loading MetaData " | |
1301 | "partition map %d\n", i); | |
1302 | goto out_bh; | |
1303 | } | |
1304 | } else { | |
1305 | ret = udf_load_vat(sb, i, type1_idx); | |
1306 | if (ret) | |
1307 | goto out_bh; | |
1308 | /* | |
1309 | * Mark filesystem read-only if we have a partition with | |
1310 | * virtual map since we don't handle writing to it (we | |
1311 | * overwrite blocks instead of relocating them). | |
1312 | */ | |
1313 | sb->s_flags |= MS_RDONLY; | |
1314 | printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only " | |
1315 | "because writing to pseudooverwrite partition is " | |
1316 | "not implemented.\n"); | |
1317 | } | |
c0eb31ed | 1318 | out_bh: |
2e0838fd | 1319 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1320 | brelse(bh); |
1321 | return ret; | |
1da177e4 LT |
1322 | } |
1323 | ||
c0eb31ed | 1324 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
28de7948 | 1325 | kernel_lb_addr *fileset) |
1da177e4 LT |
1326 | { |
1327 | struct logicalVolDesc *lvd; | |
1328 | int i, j, offset; | |
1329 | uint8_t type; | |
6c79e987 | 1330 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1331 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1332 | uint16_t ident; |
1333 | struct buffer_head *bh; | |
1334 | int ret = 0; | |
1da177e4 | 1335 | |
c0eb31ed JK |
1336 | bh = udf_read_tagged(sb, block, block, &ident); |
1337 | if (!bh) | |
1338 | return 1; | |
1339 | BUG_ON(ident != TAG_IDENT_LVD); | |
1da177e4 LT |
1340 | lvd = (struct logicalVolDesc *)bh->b_data; |
1341 | ||
dc5d39be | 1342 | i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
c0eb31ed JK |
1343 | if (i != 0) { |
1344 | ret = i; | |
1345 | goto out_bh; | |
1346 | } | |
1da177e4 | 1347 | |
cb00ea35 | 1348 | for (i = 0, offset = 0; |
6c79e987 | 1349 | i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength); |
4b11111a MS |
1350 | i++, offset += gpm->partitionMapLength) { |
1351 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1352 | gpm = (struct genericPartitionMap *) | |
1353 | &(lvd->partitionMaps[offset]); | |
1354 | type = gpm->partitionMapType; | |
cb00ea35 | 1355 | if (type == 1) { |
4b11111a MS |
1356 | struct genericPartitionMap1 *gpm1 = |
1357 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1358 | map->s_partition_type = UDF_TYPE1_MAP15; |
1359 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1360 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1361 | map->s_partition_func = NULL; | |
cb00ea35 | 1362 | } else if (type == 2) { |
4b11111a MS |
1363 | struct udfPartitionMap2 *upm2 = |
1364 | (struct udfPartitionMap2 *)gpm; | |
1365 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1366 | strlen(UDF_ID_VIRTUAL))) { | |
1367 | u16 suf = | |
1368 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1369 | identSuffix)[0]); | |
c82a1275 | 1370 | if (suf < 0x0200) { |
4b11111a MS |
1371 | map->s_partition_type = |
1372 | UDF_VIRTUAL_MAP15; | |
1373 | map->s_partition_func = | |
1374 | udf_get_pblock_virt15; | |
c82a1275 | 1375 | } else { |
4b11111a MS |
1376 | map->s_partition_type = |
1377 | UDF_VIRTUAL_MAP20; | |
1378 | map->s_partition_func = | |
1379 | udf_get_pblock_virt20; | |
1da177e4 | 1380 | } |
4b11111a MS |
1381 | } else if (!strncmp(upm2->partIdent.ident, |
1382 | UDF_ID_SPARABLE, | |
1383 | strlen(UDF_ID_SPARABLE))) { | |
1da177e4 | 1384 | uint32_t loc; |
1da177e4 | 1385 | struct sparingTable *st; |
4b11111a MS |
1386 | struct sparablePartitionMap *spm = |
1387 | (struct sparablePartitionMap *)gpm; | |
28de7948 | 1388 | |
6c79e987 | 1389 | map->s_partition_type = UDF_SPARABLE_MAP15; |
4b11111a MS |
1390 | map->s_type_specific.s_sparing.s_packet_len = |
1391 | le16_to_cpu(spm->packetLength); | |
cb00ea35 | 1392 | for (j = 0; j < spm->numSparingTables; j++) { |
4b11111a MS |
1393 | struct buffer_head *bh2; |
1394 | ||
1395 | loc = le32_to_cpu( | |
1396 | spm->locSparingTable[j]); | |
1397 | bh2 = udf_read_tagged(sb, loc, loc, | |
1398 | &ident); | |
1399 | map->s_type_specific.s_sparing. | |
1400 | s_spar_map[j] = bh2; | |
1401 | ||
165923fa MS |
1402 | if (bh2 == NULL) |
1403 | continue; | |
1404 | ||
1405 | st = (struct sparingTable *)bh2->b_data; | |
1406 | if (ident != 0 || strncmp( | |
1407 | st->sparingIdent.ident, | |
1408 | UDF_ID_SPARING, | |
1409 | strlen(UDF_ID_SPARING))) { | |
1410 | brelse(bh2); | |
1411 | map->s_type_specific.s_sparing. | |
1412 | s_spar_map[j] = NULL; | |
1da177e4 LT |
1413 | } |
1414 | } | |
6c79e987 | 1415 | map->s_partition_func = udf_get_pblock_spar15; |
bfb257a5 JK |
1416 | } else if (!strncmp(upm2->partIdent.ident, |
1417 | UDF_ID_METADATA, | |
1418 | strlen(UDF_ID_METADATA))) { | |
1419 | struct udf_meta_data *mdata = | |
1420 | &map->s_type_specific.s_metadata; | |
1421 | struct metadataPartitionMap *mdm = | |
1422 | (struct metadataPartitionMap *) | |
1423 | &(lvd->partitionMaps[offset]); | |
1424 | udf_debug("Parsing Logical vol part %d " | |
1425 | "type %d id=%s\n", i, type, | |
1426 | UDF_ID_METADATA); | |
1427 | ||
1428 | map->s_partition_type = UDF_METADATA_MAP25; | |
1429 | map->s_partition_func = udf_get_pblock_meta25; | |
1430 | ||
1431 | mdata->s_meta_file_loc = | |
1432 | le32_to_cpu(mdm->metadataFileLoc); | |
1433 | mdata->s_mirror_file_loc = | |
1434 | le32_to_cpu(mdm->metadataMirrorFileLoc); | |
1435 | mdata->s_bitmap_file_loc = | |
1436 | le32_to_cpu(mdm->metadataBitmapFileLoc); | |
1437 | mdata->s_alloc_unit_size = | |
1438 | le32_to_cpu(mdm->allocUnitSize); | |
1439 | mdata->s_align_unit_size = | |
1440 | le16_to_cpu(mdm->alignUnitSize); | |
1441 | mdata->s_dup_md_flag = | |
1442 | mdm->flags & 0x01; | |
1443 | ||
1444 | udf_debug("Metadata Ident suffix=0x%x\n", | |
1445 | (le16_to_cpu( | |
1446 | ((__le16 *) | |
1447 | mdm->partIdent.identSuffix)[0]))); | |
1448 | udf_debug("Metadata part num=%d\n", | |
1449 | le16_to_cpu(mdm->partitionNum)); | |
1450 | udf_debug("Metadata part alloc unit size=%d\n", | |
1451 | le32_to_cpu(mdm->allocUnitSize)); | |
1452 | udf_debug("Metadata file loc=%d\n", | |
1453 | le32_to_cpu(mdm->metadataFileLoc)); | |
1454 | udf_debug("Mirror file loc=%d\n", | |
1455 | le32_to_cpu(mdm->metadataMirrorFileLoc)); | |
1456 | udf_debug("Bitmap file loc=%d\n", | |
1457 | le32_to_cpu(mdm->metadataBitmapFileLoc)); | |
1458 | udf_debug("Duplicate Flag: %d %d\n", | |
1459 | mdata->s_dup_md_flag, mdm->flags); | |
cb00ea35 | 1460 | } else { |
3a71fc5d MS |
1461 | udf_debug("Unknown ident: %s\n", |
1462 | upm2->partIdent.ident); | |
1da177e4 LT |
1463 | continue; |
1464 | } | |
6c79e987 MS |
1465 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1466 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 LT |
1467 | } |
1468 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
6c79e987 MS |
1469 | i, map->s_partition_num, type, |
1470 | map->s_volumeseqnum); | |
1da177e4 LT |
1471 | } |
1472 | ||
cb00ea35 | 1473 | if (fileset) { |
28de7948 | 1474 | long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1475 | |
1476 | *fileset = lelb_to_cpu(la->extLocation); | |
3a71fc5d MS |
1477 | udf_debug("FileSet found in LogicalVolDesc at block=%d, " |
1478 | "partition=%d\n", fileset->logicalBlockNum, | |
28de7948 | 1479 | fileset->partitionReferenceNum); |
1da177e4 LT |
1480 | } |
1481 | if (lvd->integritySeqExt.extLength) | |
1482 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
28de7948 | 1483 | |
c0eb31ed JK |
1484 | out_bh: |
1485 | brelse(bh); | |
1486 | return ret; | |
1da177e4 LT |
1487 | } |
1488 | ||
1489 | /* | |
1490 | * udf_load_logicalvolint | |
1491 | * | |
1492 | */ | |
cb00ea35 | 1493 | static void udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc) |
1da177e4 LT |
1494 | { |
1495 | struct buffer_head *bh = NULL; | |
1496 | uint16_t ident; | |
6c79e987 MS |
1497 | struct udf_sb_info *sbi = UDF_SB(sb); |
1498 | struct logicalVolIntegrityDesc *lvid; | |
1da177e4 LT |
1499 | |
1500 | while (loc.extLength > 0 && | |
cb00ea35 CG |
1501 | (bh = udf_read_tagged(sb, loc.extLocation, |
1502 | loc.extLocation, &ident)) && | |
1503 | ident == TAG_IDENT_LVID) { | |
6c79e987 MS |
1504 | sbi->s_lvid_bh = bh; |
1505 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
cb00ea35 | 1506 | |
6c79e987 | 1507 | if (lvid->nextIntegrityExt.extLength) |
3a71fc5d | 1508 | udf_load_logicalvolint(sb, |
6c79e987 | 1509 | leea_to_cpu(lvid->nextIntegrityExt)); |
cb00ea35 | 1510 | |
6c79e987 | 1511 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1512 | brelse(bh); |
1da177e4 | 1513 | loc.extLength -= sb->s_blocksize; |
cb00ea35 | 1514 | loc.extLocation++; |
1da177e4 | 1515 | } |
6c79e987 | 1516 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1517 | brelse(bh); |
1da177e4 LT |
1518 | } |
1519 | ||
1520 | /* | |
1521 | * udf_process_sequence | |
1522 | * | |
1523 | * PURPOSE | |
1524 | * Process a main/reserve volume descriptor sequence. | |
1525 | * | |
1526 | * PRE-CONDITIONS | |
1527 | * sb Pointer to _locked_ superblock. | |
1528 | * block First block of first extent of the sequence. | |
1529 | * lastblock Lastblock of first extent of the sequence. | |
1530 | * | |
1531 | * HISTORY | |
1532 | * July 1, 1997 - Andrew E. Mileski | |
1533 | * Written, tested, and released. | |
1534 | */ | |
200a3592 | 1535 | static noinline int udf_process_sequence(struct super_block *sb, long block, |
3a71fc5d | 1536 | long lastblock, kernel_lb_addr *fileset) |
1da177e4 LT |
1537 | { |
1538 | struct buffer_head *bh = NULL; | |
1539 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
4b11111a | 1540 | struct udf_vds_record *curr; |
1da177e4 LT |
1541 | struct generic_desc *gd; |
1542 | struct volDescPtr *vdp; | |
cb00ea35 | 1543 | int done = 0; |
1da177e4 LT |
1544 | uint32_t vdsn; |
1545 | uint16_t ident; | |
1546 | long next_s = 0, next_e = 0; | |
1547 | ||
1548 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1549 | ||
c0eb31ed JK |
1550 | /* |
1551 | * Read the main descriptor sequence and find which descriptors | |
1552 | * are in it. | |
1553 | */ | |
cb00ea35 | 1554 | for (; (!done && block <= lastblock); block++) { |
1da177e4 LT |
1555 | |
1556 | bh = udf_read_tagged(sb, block, block, &ident); | |
c0eb31ed JK |
1557 | if (!bh) { |
1558 | printk(KERN_ERR "udf: Block %Lu of volume descriptor " | |
1559 | "sequence is corrupted or we could not read " | |
1560 | "it.\n", (unsigned long long)block); | |
1561 | return 1; | |
1562 | } | |
1da177e4 LT |
1563 | |
1564 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1565 | gd = (struct generic_desc *)bh->b_data; | |
1566 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1567 | switch (ident) { |
28de7948 | 1568 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
4b11111a MS |
1569 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
1570 | if (vdsn >= curr->volDescSeqNum) { | |
1571 | curr->volDescSeqNum = vdsn; | |
1572 | curr->block = block; | |
cb00ea35 CG |
1573 | } |
1574 | break; | |
28de7948 | 1575 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
4b11111a MS |
1576 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
1577 | if (vdsn >= curr->volDescSeqNum) { | |
1578 | curr->volDescSeqNum = vdsn; | |
1579 | curr->block = block; | |
cb00ea35 CG |
1580 | |
1581 | vdp = (struct volDescPtr *)bh->b_data; | |
4b11111a MS |
1582 | next_s = le32_to_cpu( |
1583 | vdp->nextVolDescSeqExt.extLocation); | |
1584 | next_e = le32_to_cpu( | |
1585 | vdp->nextVolDescSeqExt.extLength); | |
cb00ea35 CG |
1586 | next_e = next_e >> sb->s_blocksize_bits; |
1587 | next_e += next_s; | |
1588 | } | |
1589 | break; | |
28de7948 | 1590 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
4b11111a MS |
1591 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
1592 | if (vdsn >= curr->volDescSeqNum) { | |
1593 | curr->volDescSeqNum = vdsn; | |
1594 | curr->block = block; | |
cb00ea35 CG |
1595 | } |
1596 | break; | |
28de7948 | 1597 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
4b11111a MS |
1598 | curr = &vds[VDS_POS_PARTITION_DESC]; |
1599 | if (!curr->block) | |
1600 | curr->block = block; | |
cb00ea35 | 1601 | break; |
28de7948 | 1602 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
4b11111a MS |
1603 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
1604 | if (vdsn >= curr->volDescSeqNum) { | |
1605 | curr->volDescSeqNum = vdsn; | |
1606 | curr->block = block; | |
cb00ea35 CG |
1607 | } |
1608 | break; | |
28de7948 | 1609 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
4b11111a MS |
1610 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
1611 | if (vdsn >= curr->volDescSeqNum) { | |
1612 | curr->volDescSeqNum = vdsn; | |
1613 | curr->block = block; | |
cb00ea35 CG |
1614 | } |
1615 | break; | |
28de7948 | 1616 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
cb00ea35 CG |
1617 | vds[VDS_POS_TERMINATING_DESC].block = block; |
1618 | if (next_e) { | |
1619 | block = next_s; | |
1620 | lastblock = next_e; | |
1621 | next_s = next_e = 0; | |
4b11111a | 1622 | } else |
cb00ea35 CG |
1623 | done = 1; |
1624 | break; | |
1da177e4 | 1625 | } |
3bf25cb4 | 1626 | brelse(bh); |
1da177e4 | 1627 | } |
c0eb31ed JK |
1628 | /* |
1629 | * Now read interesting descriptors again and process them | |
1630 | * in a suitable order | |
1631 | */ | |
1632 | if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { | |
1633 | printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n"); | |
1634 | return 1; | |
1635 | } | |
1636 | if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) | |
1637 | return 1; | |
165923fa | 1638 | |
c0eb31ed JK |
1639 | if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, |
1640 | vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) | |
1641 | return 1; | |
165923fa | 1642 | |
c0eb31ed JK |
1643 | if (vds[VDS_POS_PARTITION_DESC].block) { |
1644 | /* | |
1645 | * We rescan the whole descriptor sequence to find | |
1646 | * partition descriptor blocks and process them. | |
1647 | */ | |
1648 | for (block = vds[VDS_POS_PARTITION_DESC].block; | |
1649 | block < vds[VDS_POS_TERMINATING_DESC].block; | |
1650 | block++) | |
1651 | if (udf_load_partdesc(sb, block)) | |
165923fa | 1652 | return 1; |
1da177e4 LT |
1653 | } |
1654 | ||
1655 | return 0; | |
1656 | } | |
1657 | ||
1658 | /* | |
1659 | * udf_check_valid() | |
1660 | */ | |
cb00ea35 | 1661 | static int udf_check_valid(struct super_block *sb, int novrs, int silent) |
1da177e4 LT |
1662 | { |
1663 | long block; | |
d0db181c | 1664 | struct udf_sb_info *sbi = UDF_SB(sb); |
1da177e4 | 1665 | |
cb00ea35 | 1666 | if (novrs) { |
1da177e4 LT |
1667 | udf_debug("Validity check skipped because of novrs option\n"); |
1668 | return 0; | |
1669 | } | |
1670 | /* Check that it is NSR02 compliant */ | |
1671 | /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
165923fa | 1672 | block = udf_vrs(sb, silent); |
d0db181c PE |
1673 | if (block == -1) |
1674 | udf_debug("Failed to read byte 32768. Assuming open " | |
1675 | "disc. Skipping validity check\n"); | |
1676 | if (block && !sbi->s_last_block) | |
165923fa | 1677 | sbi->s_last_block = udf_get_last_block(sb); |
d0db181c | 1678 | return !block; |
1da177e4 LT |
1679 | } |
1680 | ||
38b74a53 | 1681 | static int udf_load_sequence(struct super_block *sb, kernel_lb_addr *fileset) |
1da177e4 LT |
1682 | { |
1683 | struct anchorVolDescPtr *anchor; | |
1684 | uint16_t ident; | |
1685 | struct buffer_head *bh; | |
1686 | long main_s, main_e, reserve_s, reserve_e; | |
38b74a53 | 1687 | int i; |
6c79e987 | 1688 | struct udf_sb_info *sbi; |
1da177e4 LT |
1689 | |
1690 | if (!sb) | |
1691 | return 1; | |
6c79e987 | 1692 | sbi = UDF_SB(sb); |
1da177e4 | 1693 | |
6c79e987 | 1694 | for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) { |
28f7c4d4 MS |
1695 | if (!sbi->s_anchor[i]) |
1696 | continue; | |
165923fa | 1697 | |
28f7c4d4 MS |
1698 | bh = udf_read_tagged(sb, sbi->s_anchor[i], sbi->s_anchor[i], |
1699 | &ident); | |
1700 | if (!bh) | |
1701 | continue; | |
1702 | ||
1703 | anchor = (struct anchorVolDescPtr *)bh->b_data; | |
1704 | ||
1705 | /* Locate the main sequence */ | |
1706 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1707 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1708 | main_e = main_e >> sb->s_blocksize_bits; | |
1709 | main_e += main_s; | |
1710 | ||
1711 | /* Locate the reserve sequence */ | |
1712 | reserve_s = le32_to_cpu( | |
4b11111a | 1713 | anchor->reserveVolDescSeqExt.extLocation); |
28f7c4d4 | 1714 | reserve_e = le32_to_cpu( |
4b11111a | 1715 | anchor->reserveVolDescSeqExt.extLength); |
28f7c4d4 MS |
1716 | reserve_e = reserve_e >> sb->s_blocksize_bits; |
1717 | reserve_e += reserve_s; | |
1da177e4 | 1718 | |
28f7c4d4 | 1719 | brelse(bh); |
1da177e4 | 1720 | |
28f7c4d4 MS |
1721 | /* Process the main & reserve sequences */ |
1722 | /* responsible for finding the PartitionDesc(s) */ | |
1723 | if (!(udf_process_sequence(sb, main_s, main_e, | |
1724 | fileset) && | |
1725 | udf_process_sequence(sb, reserve_s, reserve_e, | |
1726 | fileset))) | |
1727 | break; | |
1da177e4 LT |
1728 | } |
1729 | ||
6c79e987 | 1730 | if (i == ARRAY_SIZE(sbi->s_anchor)) { |
1da177e4 LT |
1731 | udf_debug("No Anchor block found\n"); |
1732 | return 1; | |
28f7c4d4 MS |
1733 | } |
1734 | udf_debug("Using anchor in block %d\n", sbi->s_anchor[i]); | |
1da177e4 | 1735 | |
1da177e4 LT |
1736 | return 0; |
1737 | } | |
1738 | ||
1739 | static void udf_open_lvid(struct super_block *sb) | |
1740 | { | |
6c79e987 MS |
1741 | struct udf_sb_info *sbi = UDF_SB(sb); |
1742 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
1743 | struct logicalVolIntegrityDesc *lvid; |
1744 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
1745 | if (!bh) | |
1746 | return; | |
1747 | ||
1748 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1749 | lvidiu = udf_sb_lvidiu(sbi); | |
1750 | ||
1751 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1752 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1753 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, | |
1754 | CURRENT_TIME); | |
1755 | lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN; | |
1756 | ||
1757 | lvid->descTag.descCRC = cpu_to_le16( | |
f845fced BC |
1758 | crc_itu_t(0, (char *)lvid + sizeof(tag), |
1759 | le16_to_cpu(lvid->descTag.descCRCLength))); | |
165923fa MS |
1760 | |
1761 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1762 | mark_buffer_dirty(bh); | |
1da177e4 LT |
1763 | } |
1764 | ||
1765 | static void udf_close_lvid(struct super_block *sb) | |
1766 | { | |
6c79e987 MS |
1767 | struct udf_sb_info *sbi = UDF_SB(sb); |
1768 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1769 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 1770 | struct logicalVolIntegrityDescImpUse *lvidiu; |
28de7948 | 1771 | |
6c79e987 MS |
1772 | if (!bh) |
1773 | return; | |
1774 | ||
1775 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1776 | ||
165923fa MS |
1777 | if (lvid->integrityType != LVID_INTEGRITY_TYPE_OPEN) |
1778 | return; | |
1779 | ||
1780 | lvidiu = udf_sb_lvidiu(sbi); | |
1781 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1782 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1783 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); | |
1784 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) | |
1785 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
1786 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
1787 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
1788 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
1789 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
1790 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
1791 | ||
1792 | lvid->descTag.descCRC = cpu_to_le16( | |
f845fced BC |
1793 | crc_itu_t(0, (char *)lvid + sizeof(tag), |
1794 | le16_to_cpu(lvid->descTag.descCRCLength))); | |
165923fa MS |
1795 | |
1796 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1797 | mark_buffer_dirty(bh); | |
1da177e4 LT |
1798 | } |
1799 | ||
66e1da3f MS |
1800 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
1801 | { | |
1802 | int i; | |
1803 | int nr_groups = bitmap->s_nr_groups; | |
4b11111a MS |
1804 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * |
1805 | nr_groups); | |
66e1da3f MS |
1806 | |
1807 | for (i = 0; i < nr_groups; i++) | |
1808 | if (bitmap->s_block_bitmap[i]) | |
1809 | brelse(bitmap->s_block_bitmap[i]); | |
1810 | ||
1811 | if (size <= PAGE_SIZE) | |
1812 | kfree(bitmap); | |
1813 | else | |
1814 | vfree(bitmap); | |
1815 | } | |
1816 | ||
2e0838fd JK |
1817 | static void udf_free_partition(struct udf_part_map *map) |
1818 | { | |
1819 | int i; | |
bfb257a5 | 1820 | struct udf_meta_data *mdata; |
2e0838fd JK |
1821 | |
1822 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
1823 | iput(map->s_uspace.s_table); | |
1824 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
1825 | iput(map->s_fspace.s_table); | |
1826 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
1827 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
1828 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) | |
1829 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); | |
1830 | if (map->s_partition_type == UDF_SPARABLE_MAP15) | |
1831 | for (i = 0; i < 4; i++) | |
1832 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
bfb257a5 JK |
1833 | else if (map->s_partition_type == UDF_METADATA_MAP25) { |
1834 | mdata = &map->s_type_specific.s_metadata; | |
1835 | iput(mdata->s_metadata_fe); | |
1836 | mdata->s_metadata_fe = NULL; | |
1837 | ||
1838 | iput(mdata->s_mirror_fe); | |
1839 | mdata->s_mirror_fe = NULL; | |
1840 | ||
1841 | iput(mdata->s_bitmap_fe); | |
1842 | mdata->s_bitmap_fe = NULL; | |
1843 | } | |
2e0838fd JK |
1844 | } |
1845 | ||
1da177e4 LT |
1846 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
1847 | { | |
1848 | int i; | |
cb00ea35 | 1849 | struct inode *inode = NULL; |
1da177e4 LT |
1850 | struct udf_options uopt; |
1851 | kernel_lb_addr rootdir, fileset; | |
1852 | struct udf_sb_info *sbi; | |
1853 | ||
1854 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
1855 | uopt.uid = -1; | |
1856 | uopt.gid = -1; | |
1857 | uopt.umask = 0; | |
1858 | ||
6c79e987 | 1859 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
1da177e4 LT |
1860 | if (!sbi) |
1861 | return -ENOMEM; | |
28de7948 | 1862 | |
1da177e4 | 1863 | sb->s_fs_info = sbi; |
1da177e4 | 1864 | |
1e7933de | 1865 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 1866 | |
6da80894 | 1867 | if (!udf_parse_options((char *)options, &uopt, false)) |
1da177e4 LT |
1868 | goto error_out; |
1869 | ||
1870 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 1871 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
1da177e4 | 1872 | udf_error(sb, "udf_read_super", |
cb00ea35 | 1873 | "utf8 cannot be combined with iocharset\n"); |
1da177e4 LT |
1874 | goto error_out; |
1875 | } | |
1876 | #ifdef CONFIG_UDF_NLS | |
cb00ea35 | 1877 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
1878 | uopt.nls_map = load_nls_default(); |
1879 | if (!uopt.nls_map) | |
1880 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
1881 | else | |
1882 | udf_debug("Using default NLS map\n"); | |
1883 | } | |
1884 | #endif | |
1885 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
1886 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
1887 | ||
1888 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
1889 | fileset.partitionReferenceNum = 0xFFFF; | |
1890 | ||
6c79e987 MS |
1891 | sbi->s_flags = uopt.flags; |
1892 | sbi->s_uid = uopt.uid; | |
1893 | sbi->s_gid = uopt.gid; | |
1894 | sbi->s_umask = uopt.umask; | |
1895 | sbi->s_nls_map = uopt.nls_map; | |
1da177e4 LT |
1896 | |
1897 | /* Set the block size for all transfers */ | |
f1f73ba8 CH |
1898 | if (!sb_min_blocksize(sb, uopt.blocksize)) { |
1899 | udf_debug("Bad block size (%d)\n", uopt.blocksize); | |
1900 | printk(KERN_ERR "udf: bad block size (%d)\n", uopt.blocksize); | |
1da177e4 | 1901 | goto error_out; |
f1f73ba8 | 1902 | } |
1da177e4 | 1903 | |
cb00ea35 | 1904 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 1905 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 1906 | else |
6c79e987 | 1907 | sbi->s_session = uopt.session; |
1da177e4 | 1908 | |
6c79e987 | 1909 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 1910 | |
6c79e987 MS |
1911 | sbi->s_last_block = uopt.lastblock; |
1912 | sbi->s_anchor[0] = sbi->s_anchor[1] = 0; | |
1913 | sbi->s_anchor[2] = uopt.anchor; | |
1da177e4 | 1914 | |
3a71fc5d MS |
1915 | if (udf_check_valid(sb, uopt.novrs, silent)) { |
1916 | /* read volume recognition sequences */ | |
1917 | printk(KERN_WARNING "UDF-fs: No VRS found\n"); | |
cb00ea35 | 1918 | goto error_out; |
1da177e4 LT |
1919 | } |
1920 | ||
1921 | udf_find_anchor(sb); | |
1922 | ||
1923 | /* Fill in the rest of the superblock */ | |
1924 | sb->s_op = &udf_sb_ops; | |
221e583a | 1925 | sb->s_export_op = &udf_export_ops; |
1da177e4 LT |
1926 | sb->dq_op = NULL; |
1927 | sb->s_dirt = 0; | |
1928 | sb->s_magic = UDF_SUPER_MAGIC; | |
1929 | sb->s_time_gran = 1000; | |
1930 | ||
38b74a53 | 1931 | if (udf_load_sequence(sb, &fileset)) { |
3a71fc5d | 1932 | printk(KERN_WARNING "UDF-fs: No partition found (1)\n"); |
1da177e4 LT |
1933 | goto error_out; |
1934 | } | |
1935 | ||
6c79e987 | 1936 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
1da177e4 | 1937 | |
6c79e987 | 1938 | if (sbi->s_lvid_bh) { |
4b11111a MS |
1939 | struct logicalVolIntegrityDescImpUse *lvidiu = |
1940 | udf_sb_lvidiu(sbi); | |
6c79e987 MS |
1941 | uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); |
1942 | uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
4b11111a MS |
1943 | /* uint16_t maxUDFWriteRev = |
1944 | le16_to_cpu(lvidiu->maxUDFWriteRev); */ | |
1da177e4 | 1945 | |
cb00ea35 | 1946 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
4b11111a MS |
1947 | printk(KERN_ERR "UDF-fs: minUDFReadRev=%x " |
1948 | "(max is %x)\n", | |
6c79e987 | 1949 | le16_to_cpu(lvidiu->minUDFReadRev), |
cb00ea35 | 1950 | UDF_MAX_READ_VERSION); |
1da177e4 | 1951 | goto error_out; |
4b11111a | 1952 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) |
1da177e4 | 1953 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 1954 | |
6c79e987 | 1955 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
1956 | |
1957 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
1958 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
1959 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
1960 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
1961 | } | |
1962 | ||
6c79e987 | 1963 | if (!sbi->s_partitions) { |
3a71fc5d | 1964 | printk(KERN_WARNING "UDF-fs: No partition found (2)\n"); |
1da177e4 LT |
1965 | goto error_out; |
1966 | } | |
1967 | ||
4b11111a MS |
1968 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
1969 | UDF_PART_FLAG_READ_ONLY) { | |
1970 | printk(KERN_NOTICE "UDF-fs: Partition marked readonly; " | |
1971 | "forcing readonly mount\n"); | |
39b3f6d6 | 1972 | sb->s_flags |= MS_RDONLY; |
c1a26e7d | 1973 | } |
39b3f6d6 | 1974 | |
cb00ea35 | 1975 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
3a71fc5d | 1976 | printk(KERN_WARNING "UDF-fs: No fileset found\n"); |
1da177e4 LT |
1977 | goto error_out; |
1978 | } | |
1979 | ||
cb00ea35 | 1980 | if (!silent) { |
56774805 MS |
1981 | timestamp ts; |
1982 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); | |
a9ca6635 | 1983 | udf_info("UDF: Mounting volume '%s', " |
28de7948 | 1984 | "timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
56774805 MS |
1985 | sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day, |
1986 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); | |
1da177e4 LT |
1987 | } |
1988 | if (!(sb->s_flags & MS_RDONLY)) | |
1989 | udf_open_lvid(sb); | |
1990 | ||
1991 | /* Assign the root inode */ | |
1992 | /* assign inodes by physical block number */ | |
1993 | /* perhaps it's not extensible enough, but for now ... */ | |
cb00ea35 CG |
1994 | inode = udf_iget(sb, rootdir); |
1995 | if (!inode) { | |
4b11111a MS |
1996 | printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, " |
1997 | "partition=%d\n", | |
cb00ea35 | 1998 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
1da177e4 LT |
1999 | goto error_out; |
2000 | } | |
2001 | ||
2002 | /* Allocate a dentry for the root inode */ | |
2003 | sb->s_root = d_alloc_root(inode); | |
cb00ea35 | 2004 | if (!sb->s_root) { |
3a71fc5d | 2005 | printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n"); |
1da177e4 LT |
2006 | iput(inode); |
2007 | goto error_out; | |
2008 | } | |
31170b6a | 2009 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
1da177e4 LT |
2010 | return 0; |
2011 | ||
28de7948 | 2012 | error_out: |
6c79e987 MS |
2013 | if (sbi->s_vat_inode) |
2014 | iput(sbi->s_vat_inode); | |
2e0838fd JK |
2015 | if (sbi->s_partitions) |
2016 | for (i = 0; i < sbi->s_partitions; i++) | |
2017 | udf_free_partition(&sbi->s_partmaps[i]); | |
1da177e4 LT |
2018 | #ifdef CONFIG_UDF_NLS |
2019 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2020 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2021 | #endif |
2022 | if (!(sb->s_flags & MS_RDONLY)) | |
2023 | udf_close_lvid(sb); | |
6c79e987 MS |
2024 | brelse(sbi->s_lvid_bh); |
2025 | ||
2026 | kfree(sbi->s_partmaps); | |
1da177e4 LT |
2027 | kfree(sbi); |
2028 | sb->s_fs_info = NULL; | |
28de7948 | 2029 | |
1da177e4 LT |
2030 | return -EINVAL; |
2031 | } | |
2032 | ||
b8145a76 AB |
2033 | static void udf_error(struct super_block *sb, const char *function, |
2034 | const char *fmt, ...) | |
1da177e4 LT |
2035 | { |
2036 | va_list args; | |
2037 | ||
cb00ea35 | 2038 | if (!(sb->s_flags & MS_RDONLY)) { |
1da177e4 LT |
2039 | /* mark sb error */ |
2040 | sb->s_dirt = 1; | |
2041 | } | |
2042 | va_start(args, fmt); | |
4a6e617a | 2043 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 | 2044 | va_end(args); |
3a71fc5d | 2045 | printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n", |
28de7948 | 2046 | sb->s_id, function, error_buf); |
1da177e4 LT |
2047 | } |
2048 | ||
2049 | void udf_warning(struct super_block *sb, const char *function, | |
cb00ea35 | 2050 | const char *fmt, ...) |
1da177e4 LT |
2051 | { |
2052 | va_list args; | |
2053 | ||
cb00ea35 | 2054 | va_start(args, fmt); |
4a6e617a | 2055 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 LT |
2056 | va_end(args); |
2057 | printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n", | |
cb00ea35 | 2058 | sb->s_id, function, error_buf); |
1da177e4 LT |
2059 | } |
2060 | ||
cb00ea35 | 2061 | static void udf_put_super(struct super_block *sb) |
1da177e4 LT |
2062 | { |
2063 | int i; | |
6c79e987 | 2064 | struct udf_sb_info *sbi; |
1da177e4 | 2065 | |
6c79e987 MS |
2066 | sbi = UDF_SB(sb); |
2067 | if (sbi->s_vat_inode) | |
2068 | iput(sbi->s_vat_inode); | |
2e0838fd JK |
2069 | if (sbi->s_partitions) |
2070 | for (i = 0; i < sbi->s_partitions; i++) | |
2071 | udf_free_partition(&sbi->s_partmaps[i]); | |
1da177e4 LT |
2072 | #ifdef CONFIG_UDF_NLS |
2073 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 2074 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
2075 | #endif |
2076 | if (!(sb->s_flags & MS_RDONLY)) | |
2077 | udf_close_lvid(sb); | |
6c79e987 MS |
2078 | brelse(sbi->s_lvid_bh); |
2079 | kfree(sbi->s_partmaps); | |
1da177e4 LT |
2080 | kfree(sb->s_fs_info); |
2081 | sb->s_fs_info = NULL; | |
2082 | } | |
2083 | ||
cb00ea35 | 2084 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 2085 | { |
726c3342 | 2086 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
2087 | struct udf_sb_info *sbi = UDF_SB(sb); |
2088 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
2089 | ||
2090 | if (sbi->s_lvid_bh != NULL) | |
2091 | lvidiu = udf_sb_lvidiu(sbi); | |
2092 | else | |
2093 | lvidiu = NULL; | |
726c3342 | 2094 | |
1da177e4 LT |
2095 | buf->f_type = UDF_SUPER_MAGIC; |
2096 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 2097 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
2098 | buf->f_bfree = udf_count_free(sb); |
2099 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
2100 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
2101 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
2102 | + buf->f_bfree; | |
1da177e4 LT |
2103 | buf->f_ffree = buf->f_bfree; |
2104 | /* __kernel_fsid_t f_fsid */ | |
cb00ea35 | 2105 | buf->f_namelen = UDF_NAME_LEN - 2; |
1da177e4 LT |
2106 | |
2107 | return 0; | |
2108 | } | |
2109 | ||
4b11111a MS |
2110 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
2111 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
2112 | { |
2113 | struct buffer_head *bh = NULL; | |
2114 | unsigned int accum = 0; | |
2115 | int index; | |
2116 | int block = 0, newblock; | |
2117 | kernel_lb_addr loc; | |
2118 | uint32_t bytes; | |
1da177e4 LT |
2119 | uint8_t *ptr; |
2120 | uint16_t ident; | |
2121 | struct spaceBitmapDesc *bm; | |
2122 | ||
2123 | lock_kernel(); | |
2124 | ||
2125 | loc.logicalBlockNum = bitmap->s_extPosition; | |
6c79e987 | 2126 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
1da177e4 LT |
2127 | bh = udf_read_ptagged(sb, loc, 0, &ident); |
2128 | ||
cb00ea35 | 2129 | if (!bh) { |
1da177e4 LT |
2130 | printk(KERN_ERR "udf: udf_count_free failed\n"); |
2131 | goto out; | |
cb00ea35 | 2132 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 2133 | brelse(bh); |
1da177e4 LT |
2134 | printk(KERN_ERR "udf: udf_count_free failed\n"); |
2135 | goto out; | |
2136 | } | |
2137 | ||
2138 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2139 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
2140 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
2141 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 2142 | |
cb00ea35 | 2143 | while (bytes > 0) { |
01b954a3 MS |
2144 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
2145 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2146 | cur_bytes * 8); | |
2147 | bytes -= cur_bytes; | |
cb00ea35 | 2148 | if (bytes) { |
3bf25cb4 | 2149 | brelse(bh); |
1da177e4 LT |
2150 | newblock = udf_get_lb_pblock(sb, loc, ++block); |
2151 | bh = udf_tread(sb, newblock); | |
cb00ea35 | 2152 | if (!bh) { |
1da177e4 LT |
2153 | udf_debug("read failed\n"); |
2154 | goto out; | |
2155 | } | |
2156 | index = 0; | |
28de7948 | 2157 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2158 | } |
2159 | } | |
3bf25cb4 | 2160 | brelse(bh); |
1da177e4 | 2161 | |
28de7948 | 2162 | out: |
1da177e4 LT |
2163 | unlock_kernel(); |
2164 | ||
2165 | return accum; | |
2166 | } | |
2167 | ||
4b11111a MS |
2168 | static unsigned int udf_count_free_table(struct super_block *sb, |
2169 | struct inode *table) | |
1da177e4 LT |
2170 | { |
2171 | unsigned int accum = 0; | |
ff116fc8 JK |
2172 | uint32_t elen; |
2173 | kernel_lb_addr eloc; | |
1da177e4 | 2174 | int8_t etype; |
ff116fc8 | 2175 | struct extent_position epos; |
1da177e4 LT |
2176 | |
2177 | lock_kernel(); | |
2178 | ||
c0b34438 | 2179 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2180 | epos.offset = sizeof(struct unallocSpaceEntry); |
2181 | epos.bh = NULL; | |
1da177e4 | 2182 | |
3a71fc5d | 2183 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2184 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2185 | |
3bf25cb4 | 2186 | brelse(epos.bh); |
1da177e4 LT |
2187 | |
2188 | unlock_kernel(); | |
2189 | ||
2190 | return accum; | |
2191 | } | |
cb00ea35 CG |
2192 | |
2193 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2194 | { |
2195 | unsigned int accum = 0; | |
6c79e987 MS |
2196 | struct udf_sb_info *sbi; |
2197 | struct udf_part_map *map; | |
1da177e4 | 2198 | |
6c79e987 MS |
2199 | sbi = UDF_SB(sb); |
2200 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2201 | struct logicalVolIntegrityDesc *lvid = |
2202 | (struct logicalVolIntegrityDesc *) | |
2203 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2204 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2205 | accum = le32_to_cpu( |
2206 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2207 | if (accum == 0xFFFFFFFF) |
2208 | accum = 0; | |
2209 | } | |
2210 | } | |
2211 | ||
2212 | if (accum) | |
2213 | return accum; | |
2214 | ||
6c79e987 MS |
2215 | map = &sbi->s_partmaps[sbi->s_partition]; |
2216 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2217 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2218 | map->s_uspace.s_bitmap); |
1da177e4 | 2219 | } |
6c79e987 | 2220 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
28de7948 | 2221 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2222 | map->s_fspace.s_bitmap); |
1da177e4 LT |
2223 | } |
2224 | if (accum) | |
2225 | return accum; | |
2226 | ||
6c79e987 | 2227 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2228 | accum += udf_count_free_table(sb, |
6c79e987 | 2229 | map->s_uspace.s_table); |
1da177e4 | 2230 | } |
6c79e987 | 2231 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
28de7948 | 2232 | accum += udf_count_free_table(sb, |
6c79e987 | 2233 | map->s_fspace.s_table); |
1da177e4 LT |
2234 | } |
2235 | ||
2236 | return accum; | |
2237 | } |