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> |
1da177e4 LT |
59 | #include <asm/byteorder.h> |
60 | ||
1da177e4 LT |
61 | #include "udf_sb.h" |
62 | #include "udf_i.h" | |
63 | ||
64 | #include <linux/init.h> | |
65 | #include <asm/uaccess.h> | |
66 | ||
67 | #define VDS_POS_PRIMARY_VOL_DESC 0 | |
68 | #define VDS_POS_UNALLOC_SPACE_DESC 1 | |
69 | #define VDS_POS_LOGICAL_VOL_DESC 2 | |
70 | #define VDS_POS_PARTITION_DESC 3 | |
71 | #define VDS_POS_IMP_USE_VOL_DESC 4 | |
72 | #define VDS_POS_VOL_DESC_PTR 5 | |
73 | #define VDS_POS_TERMINATING_DESC 6 | |
74 | #define VDS_POS_LENGTH 7 | |
75 | ||
6da80894 MS |
76 | #define UDF_DEFAULT_BLOCKSIZE 2048 |
77 | ||
1da177e4 LT |
78 | static char error_buf[1024]; |
79 | ||
80 | /* These are the "meat" - everything else is stuffing */ | |
81 | static int udf_fill_super(struct super_block *, void *, int); | |
82 | static void udf_put_super(struct super_block *); | |
83 | static void udf_write_super(struct super_block *); | |
84 | static int udf_remount_fs(struct super_block *, int *, char *); | |
85 | static int udf_check_valid(struct super_block *, int, int); | |
86 | static int udf_vrs(struct super_block *sb, int silent); | |
1da177e4 LT |
87 | static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad); |
88 | static void udf_find_anchor(struct super_block *); | |
cb00ea35 CG |
89 | static int udf_find_fileset(struct super_block *, kernel_lb_addr *, |
90 | kernel_lb_addr *); | |
cb00ea35 CG |
91 | static void udf_load_fileset(struct super_block *, struct buffer_head *, |
92 | kernel_lb_addr *); | |
1da177e4 LT |
93 | static void udf_open_lvid(struct super_block *); |
94 | static void udf_close_lvid(struct super_block *); | |
95 | static unsigned int udf_count_free(struct super_block *); | |
726c3342 | 96 | static int udf_statfs(struct dentry *, struct kstatfs *); |
6da80894 | 97 | static int udf_show_options(struct seq_file *, struct vfsmount *); |
b8145a76 AB |
98 | static void udf_error(struct super_block *sb, const char *function, |
99 | const char *fmt, ...); | |
1da177e4 | 100 | |
6c79e987 MS |
101 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) |
102 | { | |
4b11111a MS |
103 | struct logicalVolIntegrityDesc *lvid = |
104 | (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; | |
6c79e987 | 105 | __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); |
4b11111a MS |
106 | __u32 offset = number_of_partitions * 2 * |
107 | sizeof(uint32_t)/sizeof(uint8_t); | |
6c79e987 MS |
108 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
109 | } | |
110 | ||
1da177e4 | 111 | /* UDF filesystem type */ |
454e2398 | 112 | static int udf_get_sb(struct file_system_type *fs_type, |
cb00ea35 CG |
113 | int flags, const char *dev_name, void *data, |
114 | struct vfsmount *mnt) | |
1da177e4 | 115 | { |
454e2398 | 116 | return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt); |
1da177e4 LT |
117 | } |
118 | ||
119 | static struct file_system_type udf_fstype = { | |
28de7948 CG |
120 | .owner = THIS_MODULE, |
121 | .name = "udf", | |
122 | .get_sb = udf_get_sb, | |
123 | .kill_sb = kill_block_super, | |
124 | .fs_flags = FS_REQUIRES_DEV, | |
1da177e4 LT |
125 | }; |
126 | ||
cb00ea35 | 127 | static struct kmem_cache *udf_inode_cachep; |
1da177e4 LT |
128 | |
129 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
130 | { | |
131 | struct udf_inode_info *ei; | |
3a71fc5d | 132 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
133 | if (!ei) |
134 | return NULL; | |
95f8797f DB |
135 | |
136 | ei->i_unique = 0; | |
137 | ei->i_lenExtents = 0; | |
138 | ei->i_next_alloc_block = 0; | |
139 | ei->i_next_alloc_goal = 0; | |
140 | ei->i_strat4096 = 0; | |
141 | ||
1da177e4 LT |
142 | return &ei->vfs_inode; |
143 | } | |
144 | ||
145 | static void udf_destroy_inode(struct inode *inode) | |
146 | { | |
147 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); | |
148 | } | |
149 | ||
4ba9b9d0 | 150 | static void init_once(struct kmem_cache *cachep, void *foo) |
1da177e4 | 151 | { |
cb00ea35 | 152 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 153 | |
a35afb83 CL |
154 | ei->i_ext.i_data = NULL; |
155 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
156 | } |
157 | ||
158 | static int init_inodecache(void) | |
159 | { | |
160 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
161 | sizeof(struct udf_inode_info), | |
cb00ea35 CG |
162 | 0, (SLAB_RECLAIM_ACCOUNT | |
163 | SLAB_MEM_SPREAD), | |
20c2df83 | 164 | init_once); |
28de7948 | 165 | if (!udf_inode_cachep) |
1da177e4 LT |
166 | return -ENOMEM; |
167 | return 0; | |
168 | } | |
169 | ||
170 | static void destroy_inodecache(void) | |
171 | { | |
1a1d92c1 | 172 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
173 | } |
174 | ||
175 | /* Superblock operations */ | |
ee9b6d61 | 176 | static const struct super_operations udf_sb_ops = { |
28de7948 CG |
177 | .alloc_inode = udf_alloc_inode, |
178 | .destroy_inode = udf_destroy_inode, | |
179 | .write_inode = udf_write_inode, | |
180 | .delete_inode = udf_delete_inode, | |
181 | .clear_inode = udf_clear_inode, | |
182 | .put_super = udf_put_super, | |
183 | .write_super = udf_write_super, | |
184 | .statfs = udf_statfs, | |
185 | .remount_fs = udf_remount_fs, | |
6da80894 | 186 | .show_options = udf_show_options, |
1da177e4 LT |
187 | }; |
188 | ||
cb00ea35 | 189 | struct udf_options { |
1da177e4 LT |
190 | unsigned char novrs; |
191 | unsigned int blocksize; | |
192 | unsigned int session; | |
193 | unsigned int lastblock; | |
194 | unsigned int anchor; | |
195 | unsigned int volume; | |
196 | unsigned short partition; | |
197 | unsigned int fileset; | |
198 | unsigned int rootdir; | |
199 | unsigned int flags; | |
200 | mode_t umask; | |
201 | gid_t gid; | |
202 | uid_t uid; | |
203 | struct nls_table *nls_map; | |
204 | }; | |
205 | ||
206 | static int __init init_udf_fs(void) | |
207 | { | |
208 | int err; | |
28de7948 | 209 | |
1da177e4 LT |
210 | err = init_inodecache(); |
211 | if (err) | |
212 | goto out1; | |
213 | err = register_filesystem(&udf_fstype); | |
214 | if (err) | |
215 | goto out; | |
28de7948 | 216 | |
1da177e4 | 217 | return 0; |
28de7948 CG |
218 | |
219 | out: | |
1da177e4 | 220 | destroy_inodecache(); |
28de7948 CG |
221 | |
222 | out1: | |
1da177e4 LT |
223 | return err; |
224 | } | |
225 | ||
226 | static void __exit exit_udf_fs(void) | |
227 | { | |
228 | unregister_filesystem(&udf_fstype); | |
229 | destroy_inodecache(); | |
230 | } | |
231 | ||
232 | module_init(init_udf_fs) | |
28de7948 | 233 | module_exit(exit_udf_fs) |
1da177e4 | 234 | |
dc5d39be MS |
235 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
236 | { | |
237 | struct udf_sb_info *sbi = UDF_SB(sb); | |
238 | ||
239 | sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), | |
240 | GFP_KERNEL); | |
241 | if (!sbi->s_partmaps) { | |
242 | udf_error(sb, __FUNCTION__, | |
243 | "Unable to allocate space for %d partition maps", | |
244 | count); | |
245 | sbi->s_partitions = 0; | |
246 | return -ENOMEM; | |
247 | } | |
248 | ||
249 | sbi->s_partitions = count; | |
250 | return 0; | |
251 | } | |
252 | ||
6da80894 MS |
253 | static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt) |
254 | { | |
255 | struct super_block *sb = mnt->mnt_sb; | |
256 | struct udf_sb_info *sbi = UDF_SB(sb); | |
257 | ||
258 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
259 | seq_puts(seq, ",nostrict"); | |
260 | if (sb->s_blocksize != UDF_DEFAULT_BLOCKSIZE) | |
261 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); | |
262 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
263 | seq_puts(seq, ",unhide"); | |
264 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
265 | seq_puts(seq, ",undelete"); | |
266 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
267 | seq_puts(seq, ",noadinicb"); | |
268 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
269 | seq_puts(seq, ",shortad"); | |
270 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
271 | seq_puts(seq, ",uid=forget"); | |
272 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) | |
273 | seq_puts(seq, ",uid=ignore"); | |
274 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) | |
275 | seq_puts(seq, ",gid=forget"); | |
276 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) | |
277 | seq_puts(seq, ",gid=ignore"); | |
278 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) | |
279 | seq_printf(seq, ",uid=%u", sbi->s_uid); | |
280 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) | |
281 | seq_printf(seq, ",gid=%u", sbi->s_gid); | |
282 | if (sbi->s_umask != 0) | |
283 | seq_printf(seq, ",umask=%o", sbi->s_umask); | |
284 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) | |
285 | seq_printf(seq, ",session=%u", sbi->s_session); | |
286 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) | |
287 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
288 | /* | |
289 | * s_anchor[2] could be zeroed out in case there is no anchor | |
290 | * in the specified block, but then the "anchor=N" option | |
291 | * originally given by the user wasn't effective, so it's OK | |
292 | * if we don't show it. | |
293 | */ | |
294 | if (sbi->s_anchor[2] != 0) | |
295 | seq_printf(seq, ",anchor=%u", sbi->s_anchor[2]); | |
296 | /* | |
297 | * volume, partition, fileset and rootdir seem to be ignored | |
298 | * currently | |
299 | */ | |
300 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) | |
301 | seq_puts(seq, ",utf8"); | |
302 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
303 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
1da177e4 LT |
308 | /* |
309 | * udf_parse_options | |
310 | * | |
311 | * PURPOSE | |
312 | * Parse mount options. | |
313 | * | |
314 | * DESCRIPTION | |
315 | * The following mount options are supported: | |
316 | * | |
317 | * gid= Set the default group. | |
318 | * umask= Set the default umask. | |
319 | * uid= Set the default user. | |
320 | * bs= Set the block size. | |
321 | * unhide Show otherwise hidden files. | |
322 | * undelete Show deleted files in lists. | |
323 | * adinicb Embed data in the inode (default) | |
324 | * noadinicb Don't embed data in the inode | |
325 | * shortad Use short ad's | |
326 | * longad Use long ad's (default) | |
327 | * nostrict Unset strict conformance | |
328 | * iocharset= Set the NLS character set | |
329 | * | |
330 | * The remaining are for debugging and disaster recovery: | |
331 | * | |
28de7948 | 332 | * novrs Skip volume sequence recognition |
1da177e4 LT |
333 | * |
334 | * The following expect a offset from 0. | |
335 | * | |
336 | * session= Set the CDROM session (default= last session) | |
337 | * anchor= Override standard anchor location. (default= 256) | |
338 | * volume= Override the VolumeDesc location. (unused) | |
339 | * partition= Override the PartitionDesc location. (unused) | |
340 | * lastblock= Set the last block of the filesystem/ | |
341 | * | |
342 | * The following expect a offset from the partition root. | |
343 | * | |
344 | * fileset= Override the fileset block location. (unused) | |
345 | * rootdir= Override the root directory location. (unused) | |
346 | * WARNING: overriding the rootdir to a non-directory may | |
347 | * yield highly unpredictable results. | |
348 | * | |
349 | * PRE-CONDITIONS | |
350 | * options Pointer to mount options string. | |
351 | * uopts Pointer to mount options variable. | |
352 | * | |
353 | * POST-CONDITIONS | |
354 | * <return> 1 Mount options parsed okay. | |
355 | * <return> 0 Error parsing mount options. | |
356 | * | |
357 | * HISTORY | |
358 | * July 1, 1997 - Andrew E. Mileski | |
359 | * Written, tested, and released. | |
360 | */ | |
28de7948 | 361 | |
1da177e4 LT |
362 | enum { |
363 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
364 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
365 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
366 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
367 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
4d6660eb | 368 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore |
1da177e4 LT |
369 | }; |
370 | ||
371 | static match_table_t tokens = { | |
28de7948 CG |
372 | {Opt_novrs, "novrs"}, |
373 | {Opt_nostrict, "nostrict"}, | |
374 | {Opt_bs, "bs=%u"}, | |
375 | {Opt_unhide, "unhide"}, | |
376 | {Opt_undelete, "undelete"}, | |
377 | {Opt_noadinicb, "noadinicb"}, | |
378 | {Opt_adinicb, "adinicb"}, | |
379 | {Opt_shortad, "shortad"}, | |
380 | {Opt_longad, "longad"}, | |
381 | {Opt_uforget, "uid=forget"}, | |
382 | {Opt_uignore, "uid=ignore"}, | |
383 | {Opt_gforget, "gid=forget"}, | |
384 | {Opt_gignore, "gid=ignore"}, | |
385 | {Opt_gid, "gid=%u"}, | |
386 | {Opt_uid, "uid=%u"}, | |
387 | {Opt_umask, "umask=%o"}, | |
388 | {Opt_session, "session=%u"}, | |
389 | {Opt_lastblock, "lastblock=%u"}, | |
390 | {Opt_anchor, "anchor=%u"}, | |
391 | {Opt_volume, "volume=%u"}, | |
392 | {Opt_partition, "partition=%u"}, | |
393 | {Opt_fileset, "fileset=%u"}, | |
394 | {Opt_rootdir, "rootdir=%u"}, | |
395 | {Opt_utf8, "utf8"}, | |
396 | {Opt_iocharset, "iocharset=%s"}, | |
397 | {Opt_err, NULL} | |
1da177e4 LT |
398 | }; |
399 | ||
6da80894 MS |
400 | static int udf_parse_options(char *options, struct udf_options *uopt, |
401 | bool remount) | |
1da177e4 LT |
402 | { |
403 | char *p; | |
404 | int option; | |
405 | ||
406 | uopt->novrs = 0; | |
6da80894 | 407 | uopt->blocksize = UDF_DEFAULT_BLOCKSIZE; |
1da177e4 LT |
408 | uopt->partition = 0xFFFF; |
409 | uopt->session = 0xFFFFFFFF; | |
410 | uopt->lastblock = 0; | |
411 | uopt->anchor = 0; | |
412 | uopt->volume = 0xFFFFFFFF; | |
413 | uopt->rootdir = 0xFFFFFFFF; | |
414 | uopt->fileset = 0xFFFFFFFF; | |
415 | uopt->nls_map = NULL; | |
416 | ||
417 | if (!options) | |
418 | return 1; | |
419 | ||
cb00ea35 | 420 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
421 | substring_t args[MAX_OPT_ARGS]; |
422 | int token; | |
423 | if (!*p) | |
424 | continue; | |
425 | ||
426 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
427 | switch (token) { |
428 | case Opt_novrs: | |
429 | uopt->novrs = 1; | |
430 | case Opt_bs: | |
431 | if (match_int(&args[0], &option)) | |
432 | return 0; | |
433 | uopt->blocksize = option; | |
434 | break; | |
435 | case Opt_unhide: | |
436 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
437 | break; | |
438 | case Opt_undelete: | |
439 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
440 | break; | |
441 | case Opt_noadinicb: | |
442 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
443 | break; | |
444 | case Opt_adinicb: | |
445 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
446 | break; | |
447 | case Opt_shortad: | |
448 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
449 | break; | |
450 | case Opt_longad: | |
451 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
452 | break; | |
453 | case Opt_gid: | |
454 | if (match_int(args, &option)) | |
455 | return 0; | |
456 | uopt->gid = option; | |
ca76d2d8 | 457 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
458 | break; |
459 | case Opt_uid: | |
460 | if (match_int(args, &option)) | |
461 | return 0; | |
462 | uopt->uid = option; | |
ca76d2d8 | 463 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
464 | break; |
465 | case Opt_umask: | |
466 | if (match_octal(args, &option)) | |
467 | return 0; | |
468 | uopt->umask = option; | |
469 | break; | |
470 | case Opt_nostrict: | |
471 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
472 | break; | |
473 | case Opt_session: | |
474 | if (match_int(args, &option)) | |
475 | return 0; | |
476 | uopt->session = option; | |
6da80894 MS |
477 | if (!remount) |
478 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
479 | break; |
480 | case Opt_lastblock: | |
481 | if (match_int(args, &option)) | |
482 | return 0; | |
483 | uopt->lastblock = option; | |
6da80894 MS |
484 | if (!remount) |
485 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
486 | break; |
487 | case Opt_anchor: | |
488 | if (match_int(args, &option)) | |
489 | return 0; | |
490 | uopt->anchor = option; | |
491 | break; | |
492 | case Opt_volume: | |
493 | if (match_int(args, &option)) | |
494 | return 0; | |
495 | uopt->volume = option; | |
496 | break; | |
497 | case Opt_partition: | |
498 | if (match_int(args, &option)) | |
499 | return 0; | |
500 | uopt->partition = option; | |
501 | break; | |
502 | case Opt_fileset: | |
503 | if (match_int(args, &option)) | |
504 | return 0; | |
505 | uopt->fileset = option; | |
506 | break; | |
507 | case Opt_rootdir: | |
508 | if (match_int(args, &option)) | |
509 | return 0; | |
510 | uopt->rootdir = option; | |
511 | break; | |
512 | case Opt_utf8: | |
513 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
514 | break; | |
1da177e4 | 515 | #ifdef CONFIG_UDF_NLS |
cb00ea35 CG |
516 | case Opt_iocharset: |
517 | uopt->nls_map = load_nls(args[0].from); | |
518 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
519 | break; | |
1da177e4 | 520 | #endif |
cb00ea35 CG |
521 | case Opt_uignore: |
522 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); | |
523 | break; | |
524 | case Opt_uforget: | |
525 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
526 | break; | |
527 | case Opt_gignore: | |
528 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); | |
529 | break; | |
530 | case Opt_gforget: | |
531 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
532 | break; | |
533 | default: | |
534 | printk(KERN_ERR "udf: bad mount option \"%s\" " | |
535 | "or missing value\n", p); | |
1da177e4 LT |
536 | return 0; |
537 | } | |
538 | } | |
539 | return 1; | |
540 | } | |
541 | ||
bd45a420 | 542 | static void udf_write_super(struct super_block *sb) |
1da177e4 LT |
543 | { |
544 | lock_kernel(); | |
28de7948 | 545 | |
1da177e4 LT |
546 | if (!(sb->s_flags & MS_RDONLY)) |
547 | udf_open_lvid(sb); | |
548 | sb->s_dirt = 0; | |
28de7948 | 549 | |
1da177e4 LT |
550 | unlock_kernel(); |
551 | } | |
552 | ||
cb00ea35 | 553 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
554 | { |
555 | struct udf_options uopt; | |
6c79e987 | 556 | struct udf_sb_info *sbi = UDF_SB(sb); |
1da177e4 | 557 | |
6c79e987 MS |
558 | uopt.flags = sbi->s_flags; |
559 | uopt.uid = sbi->s_uid; | |
560 | uopt.gid = sbi->s_gid; | |
561 | uopt.umask = sbi->s_umask; | |
1da177e4 | 562 | |
6da80894 | 563 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
564 | return -EINVAL; |
565 | ||
6c79e987 MS |
566 | sbi->s_flags = uopt.flags; |
567 | sbi->s_uid = uopt.uid; | |
568 | sbi->s_gid = uopt.gid; | |
569 | sbi->s_umask = uopt.umask; | |
1da177e4 | 570 | |
6c79e987 MS |
571 | if (sbi->s_lvid_bh) { |
572 | int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); | |
1da177e4 LT |
573 | if (write_rev > UDF_MAX_WRITE_VERSION) |
574 | *flags |= MS_RDONLY; | |
575 | } | |
576 | ||
577 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
578 | return 0; | |
579 | if (*flags & MS_RDONLY) | |
580 | udf_close_lvid(sb); | |
581 | else | |
582 | udf_open_lvid(sb); | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
cb00ea35 | 587 | static int udf_vrs(struct super_block *sb, int silent) |
1da177e4 LT |
588 | { |
589 | struct volStructDesc *vsd = NULL; | |
f4bcbbd9 | 590 | loff_t sector = 32768; |
1da177e4 LT |
591 | int sectorsize; |
592 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
593 | int iso9660 = 0; |
594 | int nsr02 = 0; | |
595 | int nsr03 = 0; | |
6c79e987 | 596 | struct udf_sb_info *sbi; |
1da177e4 LT |
597 | |
598 | /* Block size must be a multiple of 512 */ | |
599 | if (sb->s_blocksize & 511) | |
600 | return 0; | |
6c79e987 | 601 | sbi = UDF_SB(sb); |
1da177e4 LT |
602 | |
603 | if (sb->s_blocksize < sizeof(struct volStructDesc)) | |
604 | sectorsize = sizeof(struct volStructDesc); | |
605 | else | |
606 | sectorsize = sb->s_blocksize; | |
607 | ||
6c79e987 | 608 | sector += (sbi->s_session << sb->s_blocksize_bits); |
1da177e4 LT |
609 | |
610 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
cb00ea35 | 611 | (sector >> sb->s_blocksize_bits), sb->s_blocksize); |
1da177e4 | 612 | /* Process the sequence (if applicable) */ |
cb00ea35 | 613 | for (; !nsr02 && !nsr03; sector += sectorsize) { |
1da177e4 LT |
614 | /* Read a block */ |
615 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
616 | if (!bh) | |
617 | break; | |
618 | ||
619 | /* Look for ISO descriptors */ | |
620 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 621 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 622 | |
cb00ea35 | 623 | if (vsd->stdIdent[0] == 0) { |
3bf25cb4 | 624 | brelse(bh); |
1da177e4 | 625 | break; |
3a71fc5d MS |
626 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
627 | VSD_STD_ID_LEN)) { | |
1da177e4 | 628 | iso9660 = sector; |
cb00ea35 CG |
629 | switch (vsd->structType) { |
630 | case 0: | |
631 | udf_debug("ISO9660 Boot Record found\n"); | |
632 | break; | |
633 | case 1: | |
3a71fc5d MS |
634 | udf_debug("ISO9660 Primary Volume Descriptor " |
635 | "found\n"); | |
cb00ea35 CG |
636 | break; |
637 | case 2: | |
3a71fc5d MS |
638 | udf_debug("ISO9660 Supplementary Volume " |
639 | "Descriptor found\n"); | |
cb00ea35 CG |
640 | break; |
641 | case 3: | |
3a71fc5d MS |
642 | udf_debug("ISO9660 Volume Partition Descriptor " |
643 | "found\n"); | |
cb00ea35 CG |
644 | break; |
645 | case 255: | |
3a71fc5d MS |
646 | udf_debug("ISO9660 Volume Descriptor Set " |
647 | "Terminator found\n"); | |
cb00ea35 CG |
648 | break; |
649 | default: | |
650 | udf_debug("ISO9660 VRS (%u) found\n", | |
651 | vsd->structType); | |
652 | break; | |
1da177e4 | 653 | } |
3a71fc5d MS |
654 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
655 | VSD_STD_ID_LEN)) | |
656 | ; /* nothing */ | |
657 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
658 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 659 | brelse(bh); |
1da177e4 | 660 | break; |
3a71fc5d MS |
661 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
662 | VSD_STD_ID_LEN)) | |
1da177e4 | 663 | nsr02 = sector; |
3a71fc5d MS |
664 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
665 | VSD_STD_ID_LEN)) | |
1da177e4 | 666 | nsr03 = sector; |
3bf25cb4 | 667 | brelse(bh); |
1da177e4 LT |
668 | } |
669 | ||
670 | if (nsr03) | |
671 | return nsr03; | |
672 | else if (nsr02) | |
673 | return nsr02; | |
6c79e987 | 674 | else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) |
1da177e4 LT |
675 | return -1; |
676 | else | |
677 | return 0; | |
678 | } | |
679 | ||
680 | /* | |
423cf6dc | 681 | * Check whether there is an anchor block in the given block |
1da177e4 | 682 | */ |
423cf6dc JK |
683 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, |
684 | bool varconv) | |
1da177e4 | 685 | { |
1da177e4 | 686 | struct buffer_head *bh = NULL; |
423cf6dc | 687 | tag *t; |
1da177e4 LT |
688 | uint16_t ident; |
689 | uint32_t location; | |
423cf6dc | 690 | |
4f7874c8 JK |
691 | if (varconv) { |
692 | if (udf_fixed_to_variable(block) >= | |
693 | sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) | |
694 | return 0; | |
423cf6dc | 695 | bh = sb_bread(sb, udf_fixed_to_variable(block)); |
4f7874c8 | 696 | } |
423cf6dc JK |
697 | else |
698 | bh = sb_bread(sb, block); | |
699 | ||
700 | if (!bh) | |
701 | return 0; | |
702 | ||
703 | t = (tag *)bh->b_data; | |
704 | ident = le16_to_cpu(t->tagIdent); | |
705 | location = le32_to_cpu(t->tagLocation); | |
706 | brelse(bh); | |
707 | if (ident != TAG_IDENT_AVDP) | |
708 | return 0; | |
709 | return location == block; | |
710 | } | |
711 | ||
712 | /* Search for an anchor volume descriptor pointer */ | |
713 | static sector_t udf_scan_anchors(struct super_block *sb, bool varconv, | |
714 | sector_t lastblock) | |
715 | { | |
5fb28aa2 | 716 | sector_t last[6]; |
1da177e4 | 717 | int i; |
423cf6dc | 718 | struct udf_sb_info *sbi = UDF_SB(sb); |
6c79e987 | 719 | |
423cf6dc | 720 | last[0] = lastblock; |
5fb28aa2 JK |
721 | last[1] = last[0] - 1; |
722 | last[2] = last[0] + 1; | |
723 | last[3] = last[0] - 2; | |
724 | last[4] = last[0] - 150; | |
725 | last[5] = last[0] - 152; | |
1da177e4 | 726 | |
423cf6dc JK |
727 | /* according to spec, anchor is in either: |
728 | * block 256 | |
729 | * lastblock-256 | |
730 | * lastblock | |
731 | * however, if the disc isn't closed, it could be 512 */ | |
e8c96f8c | 732 | |
423cf6dc JK |
733 | for (i = 0; i < ARRAY_SIZE(last); i++) { |
734 | if (last[i] < 0) | |
735 | continue; | |
5fb28aa2 JK |
736 | if (last[i] >= sb->s_bdev->bd_inode->i_size >> |
737 | sb->s_blocksize_bits) | |
738 | continue; | |
cb00ea35 | 739 | |
423cf6dc JK |
740 | if (udf_check_anchor_block(sb, last[i], varconv)) { |
741 | sbi->s_anchor[0] = last[i]; | |
742 | sbi->s_anchor[1] = last[i] - 256; | |
743 | return last[i]; | |
744 | } | |
cb00ea35 | 745 | |
423cf6dc JK |
746 | if (last[i] < 256) |
747 | continue; | |
748 | ||
749 | if (udf_check_anchor_block(sb, last[i] - 256, varconv)) { | |
750 | sbi->s_anchor[1] = last[i] - 256; | |
751 | return last[i]; | |
1da177e4 LT |
752 | } |
753 | } | |
754 | ||
423cf6dc JK |
755 | if (udf_check_anchor_block(sb, sbi->s_session + 256, varconv)) { |
756 | sbi->s_anchor[0] = sbi->s_session + 256; | |
757 | return last[0]; | |
758 | } | |
759 | if (udf_check_anchor_block(sb, sbi->s_session + 512, varconv)) { | |
760 | sbi->s_anchor[0] = sbi->s_session + 512; | |
761 | return last[0]; | |
762 | } | |
763 | return 0; | |
764 | } | |
1da177e4 | 765 | |
423cf6dc JK |
766 | /* |
767 | * Find an anchor volume descriptor. The function expects sbi->s_lastblock to | |
768 | * be the last block on the media. | |
769 | * | |
770 | * Return 1 if not found, 0 if ok | |
771 | * | |
772 | */ | |
773 | static void udf_find_anchor(struct super_block *sb) | |
774 | { | |
775 | sector_t lastblock; | |
776 | struct buffer_head *bh = NULL; | |
777 | uint16_t ident; | |
778 | int i; | |
779 | struct udf_sb_info *sbi = UDF_SB(sb); | |
780 | ||
781 | lastblock = udf_scan_anchors(sb, 0, sbi->s_last_block); | |
782 | if (lastblock) | |
783 | goto check_anchor; | |
784 | ||
785 | /* No anchor found? Try VARCONV conversion of block numbers */ | |
786 | /* Firstly, we try to not convert number of the last block */ | |
787 | lastblock = udf_scan_anchors(sb, 1, | |
788 | udf_variable_to_fixed(sbi->s_last_block)); | |
789 | if (lastblock) { | |
790 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
791 | goto check_anchor; | |
1da177e4 LT |
792 | } |
793 | ||
423cf6dc JK |
794 | /* Secondly, we try with converted number of the last block */ |
795 | lastblock = udf_scan_anchors(sb, 1, sbi->s_last_block); | |
796 | if (lastblock) | |
797 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
798 | ||
799 | check_anchor: | |
800 | /* | |
801 | * Check located anchors and the anchor block supplied via | |
802 | * mount options | |
803 | */ | |
6c79e987 | 804 | for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) { |
165923fa MS |
805 | if (!sbi->s_anchor[i]) |
806 | continue; | |
807 | bh = udf_read_tagged(sb, sbi->s_anchor[i], | |
808 | sbi->s_anchor[i], &ident); | |
809 | if (!bh) | |
810 | sbi->s_anchor[i] = 0; | |
811 | else { | |
812 | brelse(bh); | |
423cf6dc | 813 | if (ident != TAG_IDENT_AVDP) |
6c79e987 | 814 | sbi->s_anchor[i] = 0; |
1da177e4 LT |
815 | } |
816 | } | |
817 | ||
6c79e987 | 818 | sbi->s_last_block = lastblock; |
1da177e4 LT |
819 | } |
820 | ||
3a71fc5d MS |
821 | static int udf_find_fileset(struct super_block *sb, |
822 | kernel_lb_addr *fileset, | |
823 | kernel_lb_addr *root) | |
1da177e4 LT |
824 | { |
825 | struct buffer_head *bh = NULL; | |
826 | long lastblock; | |
827 | uint16_t ident; | |
6c79e987 | 828 | struct udf_sb_info *sbi; |
1da177e4 LT |
829 | |
830 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 831 | fileset->partitionReferenceNum != 0xFFFF) { |
1da177e4 LT |
832 | bh = udf_read_ptagged(sb, *fileset, 0, &ident); |
833 | ||
28de7948 | 834 | if (!bh) { |
1da177e4 | 835 | return 1; |
28de7948 | 836 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 837 | brelse(bh); |
1da177e4 LT |
838 | return 1; |
839 | } | |
cb00ea35 | 840 | |
1da177e4 LT |
841 | } |
842 | ||
6c79e987 | 843 | sbi = UDF_SB(sb); |
3a71fc5d MS |
844 | if (!bh) { |
845 | /* Search backwards through the partitions */ | |
1da177e4 LT |
846 | kernel_lb_addr newfileset; |
847 | ||
28de7948 | 848 | /* --> cvg: FIXME - is it reasonable? */ |
1da177e4 | 849 | return 1; |
cb00ea35 | 850 | |
6c79e987 | 851 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
cb00ea35 CG |
852 | (newfileset.partitionReferenceNum != 0xFFFF && |
853 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
854 | fileset->partitionReferenceNum == 0xFFFF); | |
855 | newfileset.partitionReferenceNum--) { | |
6c79e987 MS |
856 | lastblock = sbi->s_partmaps |
857 | [newfileset.partitionReferenceNum] | |
858 | .s_partition_len; | |
1da177e4 LT |
859 | newfileset.logicalBlockNum = 0; |
860 | ||
cb00ea35 | 861 | do { |
3a71fc5d MS |
862 | bh = udf_read_ptagged(sb, newfileset, 0, |
863 | &ident); | |
cb00ea35 CG |
864 | if (!bh) { |
865 | newfileset.logicalBlockNum++; | |
1da177e4 LT |
866 | continue; |
867 | } | |
868 | ||
cb00ea35 CG |
869 | switch (ident) { |
870 | case TAG_IDENT_SBD: | |
28de7948 CG |
871 | { |
872 | struct spaceBitmapDesc *sp; | |
4b11111a MS |
873 | sp = (struct spaceBitmapDesc *) |
874 | bh->b_data; | |
28de7948 CG |
875 | newfileset.logicalBlockNum += 1 + |
876 | ((le32_to_cpu(sp->numOfBytes) + | |
4b11111a MS |
877 | sizeof(struct spaceBitmapDesc) |
878 | - 1) >> sb->s_blocksize_bits); | |
28de7948 CG |
879 | brelse(bh); |
880 | break; | |
881 | } | |
cb00ea35 | 882 | case TAG_IDENT_FSD: |
28de7948 CG |
883 | *fileset = newfileset; |
884 | break; | |
cb00ea35 | 885 | default: |
28de7948 CG |
886 | newfileset.logicalBlockNum++; |
887 | brelse(bh); | |
888 | bh = NULL; | |
889 | break; | |
1da177e4 | 890 | } |
28de7948 CG |
891 | } while (newfileset.logicalBlockNum < lastblock && |
892 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
893 | fileset->partitionReferenceNum == 0xFFFF); | |
1da177e4 LT |
894 | } |
895 | } | |
896 | ||
897 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 898 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
1da177e4 | 899 | udf_debug("Fileset at block=%d, partition=%d\n", |
cb00ea35 CG |
900 | fileset->logicalBlockNum, |
901 | fileset->partitionReferenceNum); | |
1da177e4 | 902 | |
6c79e987 | 903 | sbi->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 904 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 905 | brelse(bh); |
1da177e4 LT |
906 | return 0; |
907 | } | |
908 | return 1; | |
909 | } | |
910 | ||
c0eb31ed | 911 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
912 | { |
913 | struct primaryVolDesc *pvoldesc; | |
1da177e4 LT |
914 | struct ustr instr; |
915 | struct ustr outstr; | |
c0eb31ed JK |
916 | struct buffer_head *bh; |
917 | uint16_t ident; | |
918 | ||
919 | bh = udf_read_tagged(sb, block, block, &ident); | |
920 | if (!bh) | |
921 | return 1; | |
922 | BUG_ON(ident != TAG_IDENT_PVD); | |
1da177e4 LT |
923 | |
924 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
925 | ||
56774805 MS |
926 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
927 | pvoldesc->recordingDateAndTime)) { | |
af15a298 MS |
928 | #ifdef UDFFS_DEBUG |
929 | timestamp *ts = &pvoldesc->recordingDateAndTime; | |
cbf5676a | 930 | udf_debug("recording time %04u/%02u/%02u" |
3a71fc5d | 931 | " %02u:%02u (%x)\n", |
af15a298 MS |
932 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, |
933 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
934 | #endif | |
1da177e4 LT |
935 | } |
936 | ||
4b11111a | 937 | if (!udf_build_ustr(&instr, pvoldesc->volIdent, 32)) |
cb00ea35 | 938 | if (udf_CS0toUTF8(&outstr, &instr)) { |
6c79e987 | 939 | strncpy(UDF_SB(sb)->s_volume_ident, outstr.u_name, |
1da177e4 | 940 | outstr.u_len > 31 ? 31 : outstr.u_len); |
4b11111a MS |
941 | udf_debug("volIdent[] = '%s'\n", |
942 | UDF_SB(sb)->s_volume_ident); | |
1da177e4 | 943 | } |
1da177e4 | 944 | |
4b11111a | 945 | if (!udf_build_ustr(&instr, pvoldesc->volSetIdent, 128)) |
1da177e4 LT |
946 | if (udf_CS0toUTF8(&outstr, &instr)) |
947 | udf_debug("volSetIdent[] = '%s'\n", outstr.u_name); | |
c0eb31ed JK |
948 | |
949 | brelse(bh); | |
950 | return 0; | |
1da177e4 LT |
951 | } |
952 | ||
28de7948 CG |
953 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
954 | kernel_lb_addr *root) | |
1da177e4 LT |
955 | { |
956 | struct fileSetDesc *fset; | |
957 | ||
958 | fset = (struct fileSetDesc *)bh->b_data; | |
959 | ||
960 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
961 | ||
6c79e987 | 962 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 963 | |
cb00ea35 CG |
964 | udf_debug("Rootdir at block=%d, partition=%d\n", |
965 | root->logicalBlockNum, root->partitionReferenceNum); | |
1da177e4 LT |
966 | } |
967 | ||
883cb9d1 MS |
968 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
969 | { | |
970 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
971 | return DIV_ROUND_UP(map->s_partition_len + |
972 | (sizeof(struct spaceBitmapDesc) << 3), | |
973 | sb->s_blocksize * 8); | |
883cb9d1 MS |
974 | } |
975 | ||
66e1da3f MS |
976 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
977 | { | |
66e1da3f MS |
978 | struct udf_bitmap *bitmap; |
979 | int nr_groups; | |
980 | int size; | |
981 | ||
883cb9d1 | 982 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
983 | size = sizeof(struct udf_bitmap) + |
984 | (sizeof(struct buffer_head *) * nr_groups); | |
985 | ||
986 | if (size <= PAGE_SIZE) | |
987 | bitmap = kmalloc(size, GFP_KERNEL); | |
988 | else | |
989 | bitmap = vmalloc(size); /* TODO: get rid of vmalloc */ | |
990 | ||
991 | if (bitmap == NULL) { | |
992 | udf_error(sb, __FUNCTION__, | |
993 | "Unable to allocate space for bitmap " | |
994 | "and %d buffer_head pointers", nr_groups); | |
995 | return NULL; | |
996 | } | |
997 | ||
998 | memset(bitmap, 0x00, size); | |
999 | bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); | |
1000 | bitmap->s_nr_groups = nr_groups; | |
1001 | return bitmap; | |
1002 | } | |
1003 | ||
3fb38dfa JK |
1004 | static int udf_fill_partdesc_info(struct super_block *sb, |
1005 | struct partitionDesc *p, int p_index) | |
1da177e4 | 1006 | { |
6c79e987 | 1007 | struct udf_part_map *map; |
165923fa | 1008 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 1009 | struct partitionHeaderDesc *phd; |
165923fa | 1010 | |
3fb38dfa | 1011 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
1012 | |
1013 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
1014 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
1015 | ||
1016 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
1017 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
1018 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
1019 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
1020 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
1021 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
1022 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
1023 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
1024 | ||
1025 | udf_debug("Partition (%d:%d type %x) starts at physical %d, " | |
3fb38dfa | 1026 | "block length %d\n", partitionNumber, p_index, |
165923fa MS |
1027 | map->s_partition_type, map->s_partition_root, |
1028 | map->s_partition_len); | |
1029 | ||
1030 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
1031 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
3fb38dfa | 1032 | return 0; |
165923fa MS |
1033 | |
1034 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1035 | if (phd->unallocSpaceTable.extLength) { | |
1036 | kernel_lb_addr loc = { | |
1037 | .logicalBlockNum = le32_to_cpu( | |
1038 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 1039 | .partitionReferenceNum = p_index, |
165923fa MS |
1040 | }; |
1041 | ||
1042 | map->s_uspace.s_table = udf_iget(sb, loc); | |
1043 | if (!map->s_uspace.s_table) { | |
1044 | udf_debug("cannot load unallocSpaceTable (part %d)\n", | |
3fb38dfa JK |
1045 | p_index); |
1046 | return 1; | |
165923fa MS |
1047 | } |
1048 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; | |
1049 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", | |
3fb38dfa | 1050 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1051 | } |
1052 | ||
1053 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1054 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1055 | if (!bitmap) | |
1056 | return 1; | |
165923fa | 1057 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1058 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1059 | phd->unallocSpaceBitmap.extLength); |
2e0838fd | 1060 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1061 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1062 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
3fb38dfa | 1063 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index, |
2e0838fd | 1064 | bitmap->s_extPosition); |
165923fa MS |
1065 | } |
1066 | ||
1067 | if (phd->partitionIntegrityTable.extLength) | |
3fb38dfa | 1068 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); |
165923fa MS |
1069 | |
1070 | if (phd->freedSpaceTable.extLength) { | |
1071 | kernel_lb_addr loc = { | |
1072 | .logicalBlockNum = le32_to_cpu( | |
1073 | phd->freedSpaceTable.extPosition), | |
3fb38dfa | 1074 | .partitionReferenceNum = p_index, |
165923fa MS |
1075 | }; |
1076 | ||
1077 | map->s_fspace.s_table = udf_iget(sb, loc); | |
1078 | if (!map->s_fspace.s_table) { | |
3fb38dfa JK |
1079 | udf_debug("cannot load freedSpaceTable (part %d)\n", |
1080 | p_index); | |
1081 | return 1; | |
165923fa MS |
1082 | } |
1083 | ||
1084 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; | |
1085 | udf_debug("freedSpaceTable (part %d) @ %ld\n", | |
3fb38dfa | 1086 | p_index, map->s_fspace.s_table->i_ino); |
165923fa MS |
1087 | } |
1088 | ||
1089 | if (phd->freedSpaceBitmap.extLength) { | |
3fb38dfa JK |
1090 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1091 | if (!bitmap) | |
1092 | return 1; | |
165923fa | 1093 | map->s_fspace.s_bitmap = bitmap; |
2e0838fd | 1094 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1095 | phd->freedSpaceBitmap.extLength); |
2e0838fd | 1096 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1097 | phd->freedSpaceBitmap.extPosition); |
2e0838fd | 1098 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
3fb38dfa | 1099 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index, |
2e0838fd | 1100 | bitmap->s_extPosition); |
165923fa | 1101 | } |
3fb38dfa JK |
1102 | return 0; |
1103 | } | |
1104 | ||
38b74a53 JK |
1105 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) |
1106 | { | |
1107 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1108 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; | |
1109 | kernel_lb_addr ino; | |
fa5e0815 JK |
1110 | struct buffer_head *bh = NULL; |
1111 | struct udf_inode_info *vati; | |
1112 | uint32_t pos; | |
1113 | struct virtualAllocationTable20 *vat20; | |
38b74a53 JK |
1114 | |
1115 | /* VAT file entry is in the last recorded block */ | |
1116 | ino.partitionReferenceNum = type1_index; | |
1117 | ino.logicalBlockNum = sbi->s_last_block - map->s_partition_root; | |
1118 | sbi->s_vat_inode = udf_iget(sb, ino); | |
1119 | if (!sbi->s_vat_inode) | |
1120 | return 1; | |
1121 | ||
1122 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { | |
1123 | map->s_type_specific.s_virtual.s_start_offset = | |
1124 | udf_ext0_offset(sbi->s_vat_inode); | |
1125 | map->s_type_specific.s_virtual.s_num_entries = | |
1126 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1127 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
fa5e0815 JK |
1128 | vati = UDF_I(sbi->s_vat_inode); |
1129 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { | |
1130 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1131 | bh = sb_bread(sb, pos); | |
1132 | if (!bh) | |
1133 | return 1; | |
1134 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; | |
1135 | } else { | |
1136 | vat20 = (struct virtualAllocationTable20 *) | |
1137 | vati->i_ext.i_data; | |
1138 | } | |
38b74a53 | 1139 | |
38b74a53 JK |
1140 | map->s_type_specific.s_virtual.s_start_offset = |
1141 | le16_to_cpu(vat20->lengthHeader) + | |
1142 | udf_ext0_offset(sbi->s_vat_inode); | |
1143 | map->s_type_specific.s_virtual.s_num_entries = | |
1144 | (sbi->s_vat_inode->i_size - | |
1145 | map->s_type_specific.s_virtual. | |
1146 | s_start_offset) >> 2; | |
1147 | brelse(bh); | |
1148 | } | |
1149 | return 0; | |
1150 | } | |
1151 | ||
3fb38dfa JK |
1152 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
1153 | { | |
1154 | struct buffer_head *bh; | |
1155 | struct partitionDesc *p; | |
1156 | struct udf_part_map *map; | |
1157 | struct udf_sb_info *sbi = UDF_SB(sb); | |
38b74a53 | 1158 | int i, type1_idx; |
3fb38dfa JK |
1159 | uint16_t partitionNumber; |
1160 | uint16_t ident; | |
1161 | int ret = 0; | |
1162 | ||
1163 | bh = udf_read_tagged(sb, block, block, &ident); | |
1164 | if (!bh) | |
1165 | return 1; | |
1166 | if (ident != TAG_IDENT_PD) | |
1167 | goto out_bh; | |
1168 | ||
1169 | p = (struct partitionDesc *)bh->b_data; | |
1170 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
38b74a53 JK |
1171 | |
1172 | /* First scan for TYPE1 and SPARABLE partitions */ | |
3fb38dfa JK |
1173 | for (i = 0; i < sbi->s_partitions; i++) { |
1174 | map = &sbi->s_partmaps[i]; | |
1175 | udf_debug("Searching map: (%d == %d)\n", | |
1176 | map->s_partition_num, partitionNumber); | |
38b74a53 JK |
1177 | if (map->s_partition_num == partitionNumber && |
1178 | (map->s_partition_type == UDF_TYPE1_MAP15 || | |
1179 | map->s_partition_type == UDF_SPARABLE_MAP15)) | |
3fb38dfa JK |
1180 | break; |
1181 | } | |
1182 | ||
38b74a53 | 1183 | if (i >= sbi->s_partitions) { |
3fb38dfa JK |
1184 | udf_debug("Partition (%d) not found in partition map\n", |
1185 | partitionNumber); | |
1186 | goto out_bh; | |
1187 | } | |
165923fa | 1188 | |
3fb38dfa | 1189 | ret = udf_fill_partdesc_info(sb, p, i); |
38b74a53 JK |
1190 | |
1191 | /* | |
1192 | * Now rescan for VIRTUAL partitions when TYPE1 partitions are | |
1193 | * already set up | |
1194 | */ | |
1195 | type1_idx = i; | |
1196 | for (i = 0; i < sbi->s_partitions; i++) { | |
1197 | map = &sbi->s_partmaps[i]; | |
1198 | ||
1199 | if (map->s_partition_num == partitionNumber && | |
1200 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || | |
1201 | map->s_partition_type == UDF_VIRTUAL_MAP20)) | |
1202 | break; | |
1203 | } | |
1204 | ||
1205 | if (i >= sbi->s_partitions) | |
1206 | goto out_bh; | |
1207 | ||
1208 | ret = udf_fill_partdesc_info(sb, p, i); | |
1209 | if (ret) | |
1210 | goto out_bh; | |
96200be3 JK |
1211 | /* |
1212 | * Mark filesystem read-only if we have a partition with virtual map | |
1213 | * since we don't handle writing to it (we overwrite blocks instead of | |
1214 | * relocating them). | |
1215 | */ | |
1216 | sb->s_flags |= MS_RDONLY; | |
1217 | printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only because " | |
1218 | "writing to pseudooverwrite partition is not implemented.\n"); | |
38b74a53 | 1219 | |
38b74a53 | 1220 | ret = udf_load_vat(sb, i, type1_idx); |
c0eb31ed | 1221 | out_bh: |
2e0838fd | 1222 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1223 | brelse(bh); |
1224 | return ret; | |
1da177e4 LT |
1225 | } |
1226 | ||
c0eb31ed | 1227 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
28de7948 | 1228 | kernel_lb_addr *fileset) |
1da177e4 LT |
1229 | { |
1230 | struct logicalVolDesc *lvd; | |
1231 | int i, j, offset; | |
1232 | uint8_t type; | |
6c79e987 | 1233 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1234 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1235 | uint16_t ident; |
1236 | struct buffer_head *bh; | |
1237 | int ret = 0; | |
1da177e4 | 1238 | |
c0eb31ed JK |
1239 | bh = udf_read_tagged(sb, block, block, &ident); |
1240 | if (!bh) | |
1241 | return 1; | |
1242 | BUG_ON(ident != TAG_IDENT_LVD); | |
1da177e4 LT |
1243 | lvd = (struct logicalVolDesc *)bh->b_data; |
1244 | ||
dc5d39be | 1245 | i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
c0eb31ed JK |
1246 | if (i != 0) { |
1247 | ret = i; | |
1248 | goto out_bh; | |
1249 | } | |
1da177e4 | 1250 | |
cb00ea35 | 1251 | for (i = 0, offset = 0; |
6c79e987 | 1252 | i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength); |
4b11111a MS |
1253 | i++, offset += gpm->partitionMapLength) { |
1254 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1255 | gpm = (struct genericPartitionMap *) | |
1256 | &(lvd->partitionMaps[offset]); | |
1257 | type = gpm->partitionMapType; | |
cb00ea35 | 1258 | if (type == 1) { |
4b11111a MS |
1259 | struct genericPartitionMap1 *gpm1 = |
1260 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1261 | map->s_partition_type = UDF_TYPE1_MAP15; |
1262 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1263 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1264 | map->s_partition_func = NULL; | |
cb00ea35 | 1265 | } else if (type == 2) { |
4b11111a MS |
1266 | struct udfPartitionMap2 *upm2 = |
1267 | (struct udfPartitionMap2 *)gpm; | |
1268 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1269 | strlen(UDF_ID_VIRTUAL))) { | |
1270 | u16 suf = | |
1271 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1272 | identSuffix)[0]); | |
c82a1275 | 1273 | if (suf < 0x0200) { |
4b11111a MS |
1274 | map->s_partition_type = |
1275 | UDF_VIRTUAL_MAP15; | |
1276 | map->s_partition_func = | |
1277 | udf_get_pblock_virt15; | |
c82a1275 | 1278 | } else { |
4b11111a MS |
1279 | map->s_partition_type = |
1280 | UDF_VIRTUAL_MAP20; | |
1281 | map->s_partition_func = | |
1282 | udf_get_pblock_virt20; | |
1da177e4 | 1283 | } |
4b11111a MS |
1284 | } else if (!strncmp(upm2->partIdent.ident, |
1285 | UDF_ID_SPARABLE, | |
1286 | strlen(UDF_ID_SPARABLE))) { | |
1da177e4 | 1287 | uint32_t loc; |
1da177e4 | 1288 | struct sparingTable *st; |
4b11111a MS |
1289 | struct sparablePartitionMap *spm = |
1290 | (struct sparablePartitionMap *)gpm; | |
28de7948 | 1291 | |
6c79e987 | 1292 | map->s_partition_type = UDF_SPARABLE_MAP15; |
4b11111a MS |
1293 | map->s_type_specific.s_sparing.s_packet_len = |
1294 | le16_to_cpu(spm->packetLength); | |
cb00ea35 | 1295 | for (j = 0; j < spm->numSparingTables; j++) { |
4b11111a MS |
1296 | struct buffer_head *bh2; |
1297 | ||
1298 | loc = le32_to_cpu( | |
1299 | spm->locSparingTable[j]); | |
1300 | bh2 = udf_read_tagged(sb, loc, loc, | |
1301 | &ident); | |
1302 | map->s_type_specific.s_sparing. | |
1303 | s_spar_map[j] = bh2; | |
1304 | ||
165923fa MS |
1305 | if (bh2 == NULL) |
1306 | continue; | |
1307 | ||
1308 | st = (struct sparingTable *)bh2->b_data; | |
1309 | if (ident != 0 || strncmp( | |
1310 | st->sparingIdent.ident, | |
1311 | UDF_ID_SPARING, | |
1312 | strlen(UDF_ID_SPARING))) { | |
1313 | brelse(bh2); | |
1314 | map->s_type_specific.s_sparing. | |
1315 | s_spar_map[j] = NULL; | |
1da177e4 LT |
1316 | } |
1317 | } | |
6c79e987 | 1318 | map->s_partition_func = udf_get_pblock_spar15; |
cb00ea35 | 1319 | } else { |
3a71fc5d MS |
1320 | udf_debug("Unknown ident: %s\n", |
1321 | upm2->partIdent.ident); | |
1da177e4 LT |
1322 | continue; |
1323 | } | |
6c79e987 MS |
1324 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1325 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 LT |
1326 | } |
1327 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
6c79e987 MS |
1328 | i, map->s_partition_num, type, |
1329 | map->s_volumeseqnum); | |
1da177e4 LT |
1330 | } |
1331 | ||
cb00ea35 | 1332 | if (fileset) { |
28de7948 | 1333 | long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1334 | |
1335 | *fileset = lelb_to_cpu(la->extLocation); | |
3a71fc5d MS |
1336 | udf_debug("FileSet found in LogicalVolDesc at block=%d, " |
1337 | "partition=%d\n", fileset->logicalBlockNum, | |
28de7948 | 1338 | fileset->partitionReferenceNum); |
1da177e4 LT |
1339 | } |
1340 | if (lvd->integritySeqExt.extLength) | |
1341 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
28de7948 | 1342 | |
c0eb31ed JK |
1343 | out_bh: |
1344 | brelse(bh); | |
1345 | return ret; | |
1da177e4 LT |
1346 | } |
1347 | ||
1348 | /* | |
1349 | * udf_load_logicalvolint | |
1350 | * | |
1351 | */ | |
cb00ea35 | 1352 | static void udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc) |
1da177e4 LT |
1353 | { |
1354 | struct buffer_head *bh = NULL; | |
1355 | uint16_t ident; | |
6c79e987 MS |
1356 | struct udf_sb_info *sbi = UDF_SB(sb); |
1357 | struct logicalVolIntegrityDesc *lvid; | |
1da177e4 LT |
1358 | |
1359 | while (loc.extLength > 0 && | |
cb00ea35 CG |
1360 | (bh = udf_read_tagged(sb, loc.extLocation, |
1361 | loc.extLocation, &ident)) && | |
1362 | ident == TAG_IDENT_LVID) { | |
6c79e987 MS |
1363 | sbi->s_lvid_bh = bh; |
1364 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
cb00ea35 | 1365 | |
6c79e987 | 1366 | if (lvid->nextIntegrityExt.extLength) |
3a71fc5d | 1367 | udf_load_logicalvolint(sb, |
6c79e987 | 1368 | leea_to_cpu(lvid->nextIntegrityExt)); |
cb00ea35 | 1369 | |
6c79e987 | 1370 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1371 | brelse(bh); |
1da177e4 | 1372 | loc.extLength -= sb->s_blocksize; |
cb00ea35 | 1373 | loc.extLocation++; |
1da177e4 | 1374 | } |
6c79e987 | 1375 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1376 | brelse(bh); |
1da177e4 LT |
1377 | } |
1378 | ||
1379 | /* | |
1380 | * udf_process_sequence | |
1381 | * | |
1382 | * PURPOSE | |
1383 | * Process a main/reserve volume descriptor sequence. | |
1384 | * | |
1385 | * PRE-CONDITIONS | |
1386 | * sb Pointer to _locked_ superblock. | |
1387 | * block First block of first extent of the sequence. | |
1388 | * lastblock Lastblock of first extent of the sequence. | |
1389 | * | |
1390 | * HISTORY | |
1391 | * July 1, 1997 - Andrew E. Mileski | |
1392 | * Written, tested, and released. | |
1393 | */ | |
200a3592 | 1394 | static noinline int udf_process_sequence(struct super_block *sb, long block, |
3a71fc5d | 1395 | long lastblock, kernel_lb_addr *fileset) |
1da177e4 LT |
1396 | { |
1397 | struct buffer_head *bh = NULL; | |
1398 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
4b11111a | 1399 | struct udf_vds_record *curr; |
1da177e4 LT |
1400 | struct generic_desc *gd; |
1401 | struct volDescPtr *vdp; | |
cb00ea35 | 1402 | int done = 0; |
1da177e4 LT |
1403 | uint32_t vdsn; |
1404 | uint16_t ident; | |
1405 | long next_s = 0, next_e = 0; | |
1406 | ||
1407 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1408 | ||
c0eb31ed JK |
1409 | /* |
1410 | * Read the main descriptor sequence and find which descriptors | |
1411 | * are in it. | |
1412 | */ | |
cb00ea35 | 1413 | for (; (!done && block <= lastblock); block++) { |
1da177e4 LT |
1414 | |
1415 | bh = udf_read_tagged(sb, block, block, &ident); | |
c0eb31ed JK |
1416 | if (!bh) { |
1417 | printk(KERN_ERR "udf: Block %Lu of volume descriptor " | |
1418 | "sequence is corrupted or we could not read " | |
1419 | "it.\n", (unsigned long long)block); | |
1420 | return 1; | |
1421 | } | |
1da177e4 LT |
1422 | |
1423 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1424 | gd = (struct generic_desc *)bh->b_data; | |
1425 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1426 | switch (ident) { |
28de7948 | 1427 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
4b11111a MS |
1428 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
1429 | if (vdsn >= curr->volDescSeqNum) { | |
1430 | curr->volDescSeqNum = vdsn; | |
1431 | curr->block = block; | |
cb00ea35 CG |
1432 | } |
1433 | break; | |
28de7948 | 1434 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
4b11111a MS |
1435 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
1436 | if (vdsn >= curr->volDescSeqNum) { | |
1437 | curr->volDescSeqNum = vdsn; | |
1438 | curr->block = block; | |
cb00ea35 CG |
1439 | |
1440 | vdp = (struct volDescPtr *)bh->b_data; | |
4b11111a MS |
1441 | next_s = le32_to_cpu( |
1442 | vdp->nextVolDescSeqExt.extLocation); | |
1443 | next_e = le32_to_cpu( | |
1444 | vdp->nextVolDescSeqExt.extLength); | |
cb00ea35 CG |
1445 | next_e = next_e >> sb->s_blocksize_bits; |
1446 | next_e += next_s; | |
1447 | } | |
1448 | break; | |
28de7948 | 1449 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
4b11111a MS |
1450 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
1451 | if (vdsn >= curr->volDescSeqNum) { | |
1452 | curr->volDescSeqNum = vdsn; | |
1453 | curr->block = block; | |
cb00ea35 CG |
1454 | } |
1455 | break; | |
28de7948 | 1456 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
4b11111a MS |
1457 | curr = &vds[VDS_POS_PARTITION_DESC]; |
1458 | if (!curr->block) | |
1459 | curr->block = block; | |
cb00ea35 | 1460 | break; |
28de7948 | 1461 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
4b11111a MS |
1462 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
1463 | if (vdsn >= curr->volDescSeqNum) { | |
1464 | curr->volDescSeqNum = vdsn; | |
1465 | curr->block = block; | |
cb00ea35 CG |
1466 | } |
1467 | break; | |
28de7948 | 1468 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
4b11111a MS |
1469 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
1470 | if (vdsn >= curr->volDescSeqNum) { | |
1471 | curr->volDescSeqNum = vdsn; | |
1472 | curr->block = block; | |
cb00ea35 CG |
1473 | } |
1474 | break; | |
28de7948 | 1475 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
cb00ea35 CG |
1476 | vds[VDS_POS_TERMINATING_DESC].block = block; |
1477 | if (next_e) { | |
1478 | block = next_s; | |
1479 | lastblock = next_e; | |
1480 | next_s = next_e = 0; | |
4b11111a | 1481 | } else |
cb00ea35 CG |
1482 | done = 1; |
1483 | break; | |
1da177e4 | 1484 | } |
3bf25cb4 | 1485 | brelse(bh); |
1da177e4 | 1486 | } |
c0eb31ed JK |
1487 | /* |
1488 | * Now read interesting descriptors again and process them | |
1489 | * in a suitable order | |
1490 | */ | |
1491 | if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { | |
1492 | printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n"); | |
1493 | return 1; | |
1494 | } | |
1495 | if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) | |
1496 | return 1; | |
165923fa | 1497 | |
c0eb31ed JK |
1498 | if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, |
1499 | vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) | |
1500 | return 1; | |
165923fa | 1501 | |
c0eb31ed JK |
1502 | if (vds[VDS_POS_PARTITION_DESC].block) { |
1503 | /* | |
1504 | * We rescan the whole descriptor sequence to find | |
1505 | * partition descriptor blocks and process them. | |
1506 | */ | |
1507 | for (block = vds[VDS_POS_PARTITION_DESC].block; | |
1508 | block < vds[VDS_POS_TERMINATING_DESC].block; | |
1509 | block++) | |
1510 | if (udf_load_partdesc(sb, block)) | |
165923fa | 1511 | return 1; |
1da177e4 LT |
1512 | } |
1513 | ||
1514 | return 0; | |
1515 | } | |
1516 | ||
1517 | /* | |
1518 | * udf_check_valid() | |
1519 | */ | |
cb00ea35 | 1520 | static int udf_check_valid(struct super_block *sb, int novrs, int silent) |
1da177e4 LT |
1521 | { |
1522 | long block; | |
d0db181c | 1523 | struct udf_sb_info *sbi = UDF_SB(sb); |
1da177e4 | 1524 | |
cb00ea35 | 1525 | if (novrs) { |
1da177e4 LT |
1526 | udf_debug("Validity check skipped because of novrs option\n"); |
1527 | return 0; | |
1528 | } | |
1529 | /* Check that it is NSR02 compliant */ | |
1530 | /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
165923fa | 1531 | block = udf_vrs(sb, silent); |
d0db181c PE |
1532 | if (block == -1) |
1533 | udf_debug("Failed to read byte 32768. Assuming open " | |
1534 | "disc. Skipping validity check\n"); | |
1535 | if (block && !sbi->s_last_block) | |
165923fa | 1536 | sbi->s_last_block = udf_get_last_block(sb); |
d0db181c | 1537 | return !block; |
1da177e4 LT |
1538 | } |
1539 | ||
38b74a53 | 1540 | static int udf_load_sequence(struct super_block *sb, kernel_lb_addr *fileset) |
1da177e4 LT |
1541 | { |
1542 | struct anchorVolDescPtr *anchor; | |
1543 | uint16_t ident; | |
1544 | struct buffer_head *bh; | |
1545 | long main_s, main_e, reserve_s, reserve_e; | |
38b74a53 | 1546 | int i; |
6c79e987 | 1547 | struct udf_sb_info *sbi; |
1da177e4 LT |
1548 | |
1549 | if (!sb) | |
1550 | return 1; | |
6c79e987 | 1551 | sbi = UDF_SB(sb); |
1da177e4 | 1552 | |
6c79e987 | 1553 | for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) { |
28f7c4d4 MS |
1554 | if (!sbi->s_anchor[i]) |
1555 | continue; | |
165923fa | 1556 | |
28f7c4d4 MS |
1557 | bh = udf_read_tagged(sb, sbi->s_anchor[i], sbi->s_anchor[i], |
1558 | &ident); | |
1559 | if (!bh) | |
1560 | continue; | |
1561 | ||
1562 | anchor = (struct anchorVolDescPtr *)bh->b_data; | |
1563 | ||
1564 | /* Locate the main sequence */ | |
1565 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1566 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1567 | main_e = main_e >> sb->s_blocksize_bits; | |
1568 | main_e += main_s; | |
1569 | ||
1570 | /* Locate the reserve sequence */ | |
1571 | reserve_s = le32_to_cpu( | |
4b11111a | 1572 | anchor->reserveVolDescSeqExt.extLocation); |
28f7c4d4 | 1573 | reserve_e = le32_to_cpu( |
4b11111a | 1574 | anchor->reserveVolDescSeqExt.extLength); |
28f7c4d4 MS |
1575 | reserve_e = reserve_e >> sb->s_blocksize_bits; |
1576 | reserve_e += reserve_s; | |
1da177e4 | 1577 | |
28f7c4d4 | 1578 | brelse(bh); |
1da177e4 | 1579 | |
28f7c4d4 MS |
1580 | /* Process the main & reserve sequences */ |
1581 | /* responsible for finding the PartitionDesc(s) */ | |
1582 | if (!(udf_process_sequence(sb, main_s, main_e, | |
1583 | fileset) && | |
1584 | udf_process_sequence(sb, reserve_s, reserve_e, | |
1585 | fileset))) | |
1586 | break; | |
1da177e4 LT |
1587 | } |
1588 | ||
6c79e987 | 1589 | if (i == ARRAY_SIZE(sbi->s_anchor)) { |
1da177e4 LT |
1590 | udf_debug("No Anchor block found\n"); |
1591 | return 1; | |
28f7c4d4 MS |
1592 | } |
1593 | udf_debug("Using anchor in block %d\n", sbi->s_anchor[i]); | |
1da177e4 | 1594 | |
1da177e4 LT |
1595 | return 0; |
1596 | } | |
1597 | ||
1598 | static void udf_open_lvid(struct super_block *sb) | |
1599 | { | |
6c79e987 MS |
1600 | struct udf_sb_info *sbi = UDF_SB(sb); |
1601 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
1602 | struct logicalVolIntegrityDesc *lvid; |
1603 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
1604 | if (!bh) | |
1605 | return; | |
1606 | ||
1607 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1608 | lvidiu = udf_sb_lvidiu(sbi); | |
1609 | ||
1610 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1611 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1612 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, | |
1613 | CURRENT_TIME); | |
1614 | lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN; | |
1615 | ||
1616 | lvid->descTag.descCRC = cpu_to_le16( | |
1617 | udf_crc((char *)lvid + sizeof(tag), | |
1618 | le16_to_cpu(lvid->descTag.descCRCLength), 0)); | |
1619 | ||
1620 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1621 | mark_buffer_dirty(bh); | |
1da177e4 LT |
1622 | } |
1623 | ||
1624 | static void udf_close_lvid(struct super_block *sb) | |
1625 | { | |
6c79e987 MS |
1626 | struct udf_sb_info *sbi = UDF_SB(sb); |
1627 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1628 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 1629 | struct logicalVolIntegrityDescImpUse *lvidiu; |
28de7948 | 1630 | |
6c79e987 MS |
1631 | if (!bh) |
1632 | return; | |
1633 | ||
1634 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1635 | ||
165923fa MS |
1636 | if (lvid->integrityType != LVID_INTEGRITY_TYPE_OPEN) |
1637 | return; | |
1638 | ||
1639 | lvidiu = udf_sb_lvidiu(sbi); | |
1640 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1641 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1642 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); | |
1643 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) | |
1644 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
1645 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
1646 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
1647 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
1648 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
1649 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
1650 | ||
1651 | lvid->descTag.descCRC = cpu_to_le16( | |
1652 | udf_crc((char *)lvid + sizeof(tag), | |
1653 | le16_to_cpu(lvid->descTag.descCRCLength), | |
1654 | 0)); | |
1655 | ||
1656 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1657 | mark_buffer_dirty(bh); | |
1da177e4 LT |
1658 | } |
1659 | ||
66e1da3f MS |
1660 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
1661 | { | |
1662 | int i; | |
1663 | int nr_groups = bitmap->s_nr_groups; | |
4b11111a MS |
1664 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * |
1665 | nr_groups); | |
66e1da3f MS |
1666 | |
1667 | for (i = 0; i < nr_groups; i++) | |
1668 | if (bitmap->s_block_bitmap[i]) | |
1669 | brelse(bitmap->s_block_bitmap[i]); | |
1670 | ||
1671 | if (size <= PAGE_SIZE) | |
1672 | kfree(bitmap); | |
1673 | else | |
1674 | vfree(bitmap); | |
1675 | } | |
1676 | ||
2e0838fd JK |
1677 | static void udf_free_partition(struct udf_part_map *map) |
1678 | { | |
1679 | int i; | |
1680 | ||
1681 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
1682 | iput(map->s_uspace.s_table); | |
1683 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
1684 | iput(map->s_fspace.s_table); | |
1685 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
1686 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
1687 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) | |
1688 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); | |
1689 | if (map->s_partition_type == UDF_SPARABLE_MAP15) | |
1690 | for (i = 0; i < 4; i++) | |
1691 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
1692 | } | |
1693 | ||
1da177e4 LT |
1694 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
1695 | { | |
1696 | int i; | |
cb00ea35 | 1697 | struct inode *inode = NULL; |
1da177e4 LT |
1698 | struct udf_options uopt; |
1699 | kernel_lb_addr rootdir, fileset; | |
1700 | struct udf_sb_info *sbi; | |
1701 | ||
1702 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
1703 | uopt.uid = -1; | |
1704 | uopt.gid = -1; | |
1705 | uopt.umask = 0; | |
1706 | ||
6c79e987 | 1707 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
1da177e4 LT |
1708 | if (!sbi) |
1709 | return -ENOMEM; | |
28de7948 | 1710 | |
1da177e4 | 1711 | sb->s_fs_info = sbi; |
1da177e4 | 1712 | |
1e7933de | 1713 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 1714 | |
6da80894 | 1715 | if (!udf_parse_options((char *)options, &uopt, false)) |
1da177e4 LT |
1716 | goto error_out; |
1717 | ||
1718 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 1719 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
1da177e4 | 1720 | udf_error(sb, "udf_read_super", |
cb00ea35 | 1721 | "utf8 cannot be combined with iocharset\n"); |
1da177e4 LT |
1722 | goto error_out; |
1723 | } | |
1724 | #ifdef CONFIG_UDF_NLS | |
cb00ea35 | 1725 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
1726 | uopt.nls_map = load_nls_default(); |
1727 | if (!uopt.nls_map) | |
1728 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
1729 | else | |
1730 | udf_debug("Using default NLS map\n"); | |
1731 | } | |
1732 | #endif | |
1733 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
1734 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
1735 | ||
1736 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
1737 | fileset.partitionReferenceNum = 0xFFFF; | |
1738 | ||
6c79e987 MS |
1739 | sbi->s_flags = uopt.flags; |
1740 | sbi->s_uid = uopt.uid; | |
1741 | sbi->s_gid = uopt.gid; | |
1742 | sbi->s_umask = uopt.umask; | |
1743 | sbi->s_nls_map = uopt.nls_map; | |
1da177e4 LT |
1744 | |
1745 | /* Set the block size for all transfers */ | |
f1f73ba8 CH |
1746 | if (!sb_min_blocksize(sb, uopt.blocksize)) { |
1747 | udf_debug("Bad block size (%d)\n", uopt.blocksize); | |
1748 | printk(KERN_ERR "udf: bad block size (%d)\n", uopt.blocksize); | |
1da177e4 | 1749 | goto error_out; |
f1f73ba8 | 1750 | } |
1da177e4 | 1751 | |
cb00ea35 | 1752 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 1753 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 1754 | else |
6c79e987 | 1755 | sbi->s_session = uopt.session; |
1da177e4 | 1756 | |
6c79e987 | 1757 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 1758 | |
6c79e987 MS |
1759 | sbi->s_last_block = uopt.lastblock; |
1760 | sbi->s_anchor[0] = sbi->s_anchor[1] = 0; | |
1761 | sbi->s_anchor[2] = uopt.anchor; | |
1da177e4 | 1762 | |
3a71fc5d MS |
1763 | if (udf_check_valid(sb, uopt.novrs, silent)) { |
1764 | /* read volume recognition sequences */ | |
1765 | printk(KERN_WARNING "UDF-fs: No VRS found\n"); | |
cb00ea35 | 1766 | goto error_out; |
1da177e4 LT |
1767 | } |
1768 | ||
1769 | udf_find_anchor(sb); | |
1770 | ||
1771 | /* Fill in the rest of the superblock */ | |
1772 | sb->s_op = &udf_sb_ops; | |
1773 | sb->dq_op = NULL; | |
1774 | sb->s_dirt = 0; | |
1775 | sb->s_magic = UDF_SUPER_MAGIC; | |
1776 | sb->s_time_gran = 1000; | |
1777 | ||
38b74a53 | 1778 | if (udf_load_sequence(sb, &fileset)) { |
3a71fc5d | 1779 | printk(KERN_WARNING "UDF-fs: No partition found (1)\n"); |
1da177e4 LT |
1780 | goto error_out; |
1781 | } | |
1782 | ||
6c79e987 | 1783 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
1da177e4 | 1784 | |
6c79e987 | 1785 | if (sbi->s_lvid_bh) { |
4b11111a MS |
1786 | struct logicalVolIntegrityDescImpUse *lvidiu = |
1787 | udf_sb_lvidiu(sbi); | |
6c79e987 MS |
1788 | uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); |
1789 | uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
4b11111a MS |
1790 | /* uint16_t maxUDFWriteRev = |
1791 | le16_to_cpu(lvidiu->maxUDFWriteRev); */ | |
1da177e4 | 1792 | |
cb00ea35 | 1793 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
4b11111a MS |
1794 | printk(KERN_ERR "UDF-fs: minUDFReadRev=%x " |
1795 | "(max is %x)\n", | |
6c79e987 | 1796 | le16_to_cpu(lvidiu->minUDFReadRev), |
cb00ea35 | 1797 | UDF_MAX_READ_VERSION); |
1da177e4 | 1798 | goto error_out; |
4b11111a | 1799 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) |
1da177e4 | 1800 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 1801 | |
6c79e987 | 1802 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
1803 | |
1804 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
1805 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
1806 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
1807 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
1808 | } | |
1809 | ||
6c79e987 | 1810 | if (!sbi->s_partitions) { |
3a71fc5d | 1811 | printk(KERN_WARNING "UDF-fs: No partition found (2)\n"); |
1da177e4 LT |
1812 | goto error_out; |
1813 | } | |
1814 | ||
4b11111a MS |
1815 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
1816 | UDF_PART_FLAG_READ_ONLY) { | |
1817 | printk(KERN_NOTICE "UDF-fs: Partition marked readonly; " | |
1818 | "forcing readonly mount\n"); | |
39b3f6d6 | 1819 | sb->s_flags |= MS_RDONLY; |
c1a26e7d | 1820 | } |
39b3f6d6 | 1821 | |
cb00ea35 | 1822 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
3a71fc5d | 1823 | printk(KERN_WARNING "UDF-fs: No fileset found\n"); |
1da177e4 LT |
1824 | goto error_out; |
1825 | } | |
1826 | ||
cb00ea35 | 1827 | if (!silent) { |
56774805 MS |
1828 | timestamp ts; |
1829 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); | |
a9ca6635 | 1830 | udf_info("UDF: Mounting volume '%s', " |
28de7948 | 1831 | "timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
56774805 MS |
1832 | sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day, |
1833 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); | |
1da177e4 LT |
1834 | } |
1835 | if (!(sb->s_flags & MS_RDONLY)) | |
1836 | udf_open_lvid(sb); | |
1837 | ||
1838 | /* Assign the root inode */ | |
1839 | /* assign inodes by physical block number */ | |
1840 | /* perhaps it's not extensible enough, but for now ... */ | |
cb00ea35 CG |
1841 | inode = udf_iget(sb, rootdir); |
1842 | if (!inode) { | |
4b11111a MS |
1843 | printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, " |
1844 | "partition=%d\n", | |
cb00ea35 | 1845 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
1da177e4 LT |
1846 | goto error_out; |
1847 | } | |
1848 | ||
1849 | /* Allocate a dentry for the root inode */ | |
1850 | sb->s_root = d_alloc_root(inode); | |
cb00ea35 | 1851 | if (!sb->s_root) { |
3a71fc5d | 1852 | printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n"); |
1da177e4 LT |
1853 | iput(inode); |
1854 | goto error_out; | |
1855 | } | |
31170b6a | 1856 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
1da177e4 LT |
1857 | return 0; |
1858 | ||
28de7948 | 1859 | error_out: |
6c79e987 MS |
1860 | if (sbi->s_vat_inode) |
1861 | iput(sbi->s_vat_inode); | |
2e0838fd JK |
1862 | if (sbi->s_partitions) |
1863 | for (i = 0; i < sbi->s_partitions; i++) | |
1864 | udf_free_partition(&sbi->s_partmaps[i]); | |
1da177e4 LT |
1865 | #ifdef CONFIG_UDF_NLS |
1866 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 1867 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
1868 | #endif |
1869 | if (!(sb->s_flags & MS_RDONLY)) | |
1870 | udf_close_lvid(sb); | |
6c79e987 MS |
1871 | brelse(sbi->s_lvid_bh); |
1872 | ||
1873 | kfree(sbi->s_partmaps); | |
1da177e4 LT |
1874 | kfree(sbi); |
1875 | sb->s_fs_info = NULL; | |
28de7948 | 1876 | |
1da177e4 LT |
1877 | return -EINVAL; |
1878 | } | |
1879 | ||
b8145a76 AB |
1880 | static void udf_error(struct super_block *sb, const char *function, |
1881 | const char *fmt, ...) | |
1da177e4 LT |
1882 | { |
1883 | va_list args; | |
1884 | ||
cb00ea35 | 1885 | if (!(sb->s_flags & MS_RDONLY)) { |
1da177e4 LT |
1886 | /* mark sb error */ |
1887 | sb->s_dirt = 1; | |
1888 | } | |
1889 | va_start(args, fmt); | |
4a6e617a | 1890 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 | 1891 | va_end(args); |
3a71fc5d | 1892 | printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n", |
28de7948 | 1893 | sb->s_id, function, error_buf); |
1da177e4 LT |
1894 | } |
1895 | ||
1896 | void udf_warning(struct super_block *sb, const char *function, | |
cb00ea35 | 1897 | const char *fmt, ...) |
1da177e4 LT |
1898 | { |
1899 | va_list args; | |
1900 | ||
cb00ea35 | 1901 | va_start(args, fmt); |
4a6e617a | 1902 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 LT |
1903 | va_end(args); |
1904 | printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n", | |
cb00ea35 | 1905 | sb->s_id, function, error_buf); |
1da177e4 LT |
1906 | } |
1907 | ||
cb00ea35 | 1908 | static void udf_put_super(struct super_block *sb) |
1da177e4 LT |
1909 | { |
1910 | int i; | |
6c79e987 | 1911 | struct udf_sb_info *sbi; |
1da177e4 | 1912 | |
6c79e987 MS |
1913 | sbi = UDF_SB(sb); |
1914 | if (sbi->s_vat_inode) | |
1915 | iput(sbi->s_vat_inode); | |
2e0838fd JK |
1916 | if (sbi->s_partitions) |
1917 | for (i = 0; i < sbi->s_partitions; i++) | |
1918 | udf_free_partition(&sbi->s_partmaps[i]); | |
1da177e4 LT |
1919 | #ifdef CONFIG_UDF_NLS |
1920 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 1921 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
1922 | #endif |
1923 | if (!(sb->s_flags & MS_RDONLY)) | |
1924 | udf_close_lvid(sb); | |
6c79e987 MS |
1925 | brelse(sbi->s_lvid_bh); |
1926 | kfree(sbi->s_partmaps); | |
1da177e4 LT |
1927 | kfree(sb->s_fs_info); |
1928 | sb->s_fs_info = NULL; | |
1929 | } | |
1930 | ||
cb00ea35 | 1931 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 1932 | { |
726c3342 | 1933 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
1934 | struct udf_sb_info *sbi = UDF_SB(sb); |
1935 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
1936 | ||
1937 | if (sbi->s_lvid_bh != NULL) | |
1938 | lvidiu = udf_sb_lvidiu(sbi); | |
1939 | else | |
1940 | lvidiu = NULL; | |
726c3342 | 1941 | |
1da177e4 LT |
1942 | buf->f_type = UDF_SUPER_MAGIC; |
1943 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 1944 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
1945 | buf->f_bfree = udf_count_free(sb); |
1946 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
1947 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
1948 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
1949 | + buf->f_bfree; | |
1da177e4 LT |
1950 | buf->f_ffree = buf->f_bfree; |
1951 | /* __kernel_fsid_t f_fsid */ | |
cb00ea35 | 1952 | buf->f_namelen = UDF_NAME_LEN - 2; |
1da177e4 LT |
1953 | |
1954 | return 0; | |
1955 | } | |
1956 | ||
4b11111a MS |
1957 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
1958 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
1959 | { |
1960 | struct buffer_head *bh = NULL; | |
1961 | unsigned int accum = 0; | |
1962 | int index; | |
1963 | int block = 0, newblock; | |
1964 | kernel_lb_addr loc; | |
1965 | uint32_t bytes; | |
1da177e4 LT |
1966 | uint8_t *ptr; |
1967 | uint16_t ident; | |
1968 | struct spaceBitmapDesc *bm; | |
1969 | ||
1970 | lock_kernel(); | |
1971 | ||
1972 | loc.logicalBlockNum = bitmap->s_extPosition; | |
6c79e987 | 1973 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
1da177e4 LT |
1974 | bh = udf_read_ptagged(sb, loc, 0, &ident); |
1975 | ||
cb00ea35 | 1976 | if (!bh) { |
1da177e4 LT |
1977 | printk(KERN_ERR "udf: udf_count_free failed\n"); |
1978 | goto out; | |
cb00ea35 | 1979 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 1980 | brelse(bh); |
1da177e4 LT |
1981 | printk(KERN_ERR "udf: udf_count_free failed\n"); |
1982 | goto out; | |
1983 | } | |
1984 | ||
1985 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
1986 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
1987 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
1988 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 1989 | |
cb00ea35 | 1990 | while (bytes > 0) { |
01b954a3 MS |
1991 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
1992 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
1993 | cur_bytes * 8); | |
1994 | bytes -= cur_bytes; | |
cb00ea35 | 1995 | if (bytes) { |
3bf25cb4 | 1996 | brelse(bh); |
1da177e4 LT |
1997 | newblock = udf_get_lb_pblock(sb, loc, ++block); |
1998 | bh = udf_tread(sb, newblock); | |
cb00ea35 | 1999 | if (!bh) { |
1da177e4 LT |
2000 | udf_debug("read failed\n"); |
2001 | goto out; | |
2002 | } | |
2003 | index = 0; | |
28de7948 | 2004 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2005 | } |
2006 | } | |
3bf25cb4 | 2007 | brelse(bh); |
1da177e4 | 2008 | |
28de7948 | 2009 | out: |
1da177e4 LT |
2010 | unlock_kernel(); |
2011 | ||
2012 | return accum; | |
2013 | } | |
2014 | ||
4b11111a MS |
2015 | static unsigned int udf_count_free_table(struct super_block *sb, |
2016 | struct inode *table) | |
1da177e4 LT |
2017 | { |
2018 | unsigned int accum = 0; | |
ff116fc8 JK |
2019 | uint32_t elen; |
2020 | kernel_lb_addr eloc; | |
1da177e4 | 2021 | int8_t etype; |
ff116fc8 | 2022 | struct extent_position epos; |
1da177e4 LT |
2023 | |
2024 | lock_kernel(); | |
2025 | ||
c0b34438 | 2026 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2027 | epos.offset = sizeof(struct unallocSpaceEntry); |
2028 | epos.bh = NULL; | |
1da177e4 | 2029 | |
3a71fc5d | 2030 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2031 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2032 | |
3bf25cb4 | 2033 | brelse(epos.bh); |
1da177e4 LT |
2034 | |
2035 | unlock_kernel(); | |
2036 | ||
2037 | return accum; | |
2038 | } | |
cb00ea35 CG |
2039 | |
2040 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2041 | { |
2042 | unsigned int accum = 0; | |
6c79e987 MS |
2043 | struct udf_sb_info *sbi; |
2044 | struct udf_part_map *map; | |
1da177e4 | 2045 | |
6c79e987 MS |
2046 | sbi = UDF_SB(sb); |
2047 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2048 | struct logicalVolIntegrityDesc *lvid = |
2049 | (struct logicalVolIntegrityDesc *) | |
2050 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2051 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2052 | accum = le32_to_cpu( |
2053 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2054 | if (accum == 0xFFFFFFFF) |
2055 | accum = 0; | |
2056 | } | |
2057 | } | |
2058 | ||
2059 | if (accum) | |
2060 | return accum; | |
2061 | ||
6c79e987 MS |
2062 | map = &sbi->s_partmaps[sbi->s_partition]; |
2063 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2064 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2065 | map->s_uspace.s_bitmap); |
1da177e4 | 2066 | } |
6c79e987 | 2067 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
28de7948 | 2068 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2069 | map->s_fspace.s_bitmap); |
1da177e4 LT |
2070 | } |
2071 | if (accum) | |
2072 | return accum; | |
2073 | ||
6c79e987 | 2074 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2075 | accum += udf_count_free_table(sb, |
6c79e987 | 2076 | map->s_uspace.s_table); |
1da177e4 | 2077 | } |
6c79e987 | 2078 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
28de7948 | 2079 | accum += udf_count_free_table(sb, |
6c79e987 | 2080 | map->s_fspace.s_table); |
1da177e4 LT |
2081 | } |
2082 | ||
2083 | return accum; | |
2084 | } |