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); | |
87 | static int udf_load_partition(struct super_block *, kernel_lb_addr *); | |
cb00ea35 CG |
88 | static int udf_load_logicalvol(struct super_block *, struct buffer_head *, |
89 | kernel_lb_addr *); | |
1da177e4 LT |
90 | static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad); |
91 | static void udf_find_anchor(struct super_block *); | |
cb00ea35 CG |
92 | static int udf_find_fileset(struct super_block *, kernel_lb_addr *, |
93 | kernel_lb_addr *); | |
1da177e4 | 94 | static void udf_load_pvoldesc(struct super_block *, struct buffer_head *); |
cb00ea35 CG |
95 | static void udf_load_fileset(struct super_block *, struct buffer_head *, |
96 | kernel_lb_addr *); | |
bcec4477 | 97 | static int udf_load_partdesc(struct super_block *, struct buffer_head *); |
1da177e4 LT |
98 | static void udf_open_lvid(struct super_block *); |
99 | static void udf_close_lvid(struct super_block *); | |
100 | static unsigned int udf_count_free(struct super_block *); | |
726c3342 | 101 | static int udf_statfs(struct dentry *, struct kstatfs *); |
6da80894 | 102 | static int udf_show_options(struct seq_file *, struct vfsmount *); |
b8145a76 AB |
103 | static void udf_error(struct super_block *sb, const char *function, |
104 | const char *fmt, ...); | |
1da177e4 | 105 | |
6c79e987 MS |
106 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) |
107 | { | |
4b11111a MS |
108 | struct logicalVolIntegrityDesc *lvid = |
109 | (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; | |
6c79e987 | 110 | __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); |
4b11111a MS |
111 | __u32 offset = number_of_partitions * 2 * |
112 | sizeof(uint32_t)/sizeof(uint8_t); | |
6c79e987 MS |
113 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
114 | } | |
115 | ||
1da177e4 | 116 | /* UDF filesystem type */ |
454e2398 | 117 | static int udf_get_sb(struct file_system_type *fs_type, |
cb00ea35 CG |
118 | int flags, const char *dev_name, void *data, |
119 | struct vfsmount *mnt) | |
1da177e4 | 120 | { |
454e2398 | 121 | return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt); |
1da177e4 LT |
122 | } |
123 | ||
124 | static struct file_system_type udf_fstype = { | |
28de7948 CG |
125 | .owner = THIS_MODULE, |
126 | .name = "udf", | |
127 | .get_sb = udf_get_sb, | |
128 | .kill_sb = kill_block_super, | |
129 | .fs_flags = FS_REQUIRES_DEV, | |
1da177e4 LT |
130 | }; |
131 | ||
cb00ea35 | 132 | static struct kmem_cache *udf_inode_cachep; |
1da177e4 LT |
133 | |
134 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
135 | { | |
136 | struct udf_inode_info *ei; | |
3a71fc5d | 137 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
138 | if (!ei) |
139 | return NULL; | |
95f8797f DB |
140 | |
141 | ei->i_unique = 0; | |
142 | ei->i_lenExtents = 0; | |
143 | ei->i_next_alloc_block = 0; | |
144 | ei->i_next_alloc_goal = 0; | |
145 | ei->i_strat4096 = 0; | |
146 | ||
1da177e4 LT |
147 | return &ei->vfs_inode; |
148 | } | |
149 | ||
150 | static void udf_destroy_inode(struct inode *inode) | |
151 | { | |
152 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); | |
153 | } | |
154 | ||
4ba9b9d0 | 155 | static void init_once(struct kmem_cache *cachep, void *foo) |
1da177e4 | 156 | { |
cb00ea35 | 157 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 158 | |
a35afb83 CL |
159 | ei->i_ext.i_data = NULL; |
160 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
161 | } |
162 | ||
163 | static int init_inodecache(void) | |
164 | { | |
165 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
166 | sizeof(struct udf_inode_info), | |
cb00ea35 CG |
167 | 0, (SLAB_RECLAIM_ACCOUNT | |
168 | SLAB_MEM_SPREAD), | |
20c2df83 | 169 | init_once); |
28de7948 | 170 | if (!udf_inode_cachep) |
1da177e4 LT |
171 | return -ENOMEM; |
172 | return 0; | |
173 | } | |
174 | ||
175 | static void destroy_inodecache(void) | |
176 | { | |
1a1d92c1 | 177 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
178 | } |
179 | ||
180 | /* Superblock operations */ | |
ee9b6d61 | 181 | static const struct super_operations udf_sb_ops = { |
28de7948 CG |
182 | .alloc_inode = udf_alloc_inode, |
183 | .destroy_inode = udf_destroy_inode, | |
184 | .write_inode = udf_write_inode, | |
185 | .delete_inode = udf_delete_inode, | |
186 | .clear_inode = udf_clear_inode, | |
187 | .put_super = udf_put_super, | |
188 | .write_super = udf_write_super, | |
189 | .statfs = udf_statfs, | |
190 | .remount_fs = udf_remount_fs, | |
6da80894 | 191 | .show_options = udf_show_options, |
1da177e4 LT |
192 | }; |
193 | ||
cb00ea35 | 194 | struct udf_options { |
1da177e4 LT |
195 | unsigned char novrs; |
196 | unsigned int blocksize; | |
197 | unsigned int session; | |
198 | unsigned int lastblock; | |
199 | unsigned int anchor; | |
200 | unsigned int volume; | |
201 | unsigned short partition; | |
202 | unsigned int fileset; | |
203 | unsigned int rootdir; | |
204 | unsigned int flags; | |
205 | mode_t umask; | |
206 | gid_t gid; | |
207 | uid_t uid; | |
208 | struct nls_table *nls_map; | |
209 | }; | |
210 | ||
211 | static int __init init_udf_fs(void) | |
212 | { | |
213 | int err; | |
28de7948 | 214 | |
1da177e4 LT |
215 | err = init_inodecache(); |
216 | if (err) | |
217 | goto out1; | |
218 | err = register_filesystem(&udf_fstype); | |
219 | if (err) | |
220 | goto out; | |
28de7948 | 221 | |
1da177e4 | 222 | return 0; |
28de7948 CG |
223 | |
224 | out: | |
1da177e4 | 225 | destroy_inodecache(); |
28de7948 CG |
226 | |
227 | out1: | |
1da177e4 LT |
228 | return err; |
229 | } | |
230 | ||
231 | static void __exit exit_udf_fs(void) | |
232 | { | |
233 | unregister_filesystem(&udf_fstype); | |
234 | destroy_inodecache(); | |
235 | } | |
236 | ||
237 | module_init(init_udf_fs) | |
28de7948 | 238 | module_exit(exit_udf_fs) |
1da177e4 | 239 | |
dc5d39be MS |
240 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
241 | { | |
242 | struct udf_sb_info *sbi = UDF_SB(sb); | |
243 | ||
244 | sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), | |
245 | GFP_KERNEL); | |
246 | if (!sbi->s_partmaps) { | |
247 | udf_error(sb, __FUNCTION__, | |
248 | "Unable to allocate space for %d partition maps", | |
249 | count); | |
250 | sbi->s_partitions = 0; | |
251 | return -ENOMEM; | |
252 | } | |
253 | ||
254 | sbi->s_partitions = count; | |
255 | return 0; | |
256 | } | |
257 | ||
6da80894 MS |
258 | static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt) |
259 | { | |
260 | struct super_block *sb = mnt->mnt_sb; | |
261 | struct udf_sb_info *sbi = UDF_SB(sb); | |
262 | ||
263 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
264 | seq_puts(seq, ",nostrict"); | |
265 | if (sb->s_blocksize != UDF_DEFAULT_BLOCKSIZE) | |
266 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); | |
267 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
268 | seq_puts(seq, ",unhide"); | |
269 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
270 | seq_puts(seq, ",undelete"); | |
271 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
272 | seq_puts(seq, ",noadinicb"); | |
273 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
274 | seq_puts(seq, ",shortad"); | |
275 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
276 | seq_puts(seq, ",uid=forget"); | |
277 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) | |
278 | seq_puts(seq, ",uid=ignore"); | |
279 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) | |
280 | seq_puts(seq, ",gid=forget"); | |
281 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) | |
282 | seq_puts(seq, ",gid=ignore"); | |
283 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) | |
284 | seq_printf(seq, ",uid=%u", sbi->s_uid); | |
285 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) | |
286 | seq_printf(seq, ",gid=%u", sbi->s_gid); | |
287 | if (sbi->s_umask != 0) | |
288 | seq_printf(seq, ",umask=%o", sbi->s_umask); | |
289 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) | |
290 | seq_printf(seq, ",session=%u", sbi->s_session); | |
291 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) | |
292 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
293 | /* | |
294 | * s_anchor[2] could be zeroed out in case there is no anchor | |
295 | * in the specified block, but then the "anchor=N" option | |
296 | * originally given by the user wasn't effective, so it's OK | |
297 | * if we don't show it. | |
298 | */ | |
299 | if (sbi->s_anchor[2] != 0) | |
300 | seq_printf(seq, ",anchor=%u", sbi->s_anchor[2]); | |
301 | /* | |
302 | * volume, partition, fileset and rootdir seem to be ignored | |
303 | * currently | |
304 | */ | |
305 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) | |
306 | seq_puts(seq, ",utf8"); | |
307 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
308 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
1da177e4 LT |
313 | /* |
314 | * udf_parse_options | |
315 | * | |
316 | * PURPOSE | |
317 | * Parse mount options. | |
318 | * | |
319 | * DESCRIPTION | |
320 | * The following mount options are supported: | |
321 | * | |
322 | * gid= Set the default group. | |
323 | * umask= Set the default umask. | |
324 | * uid= Set the default user. | |
325 | * bs= Set the block size. | |
326 | * unhide Show otherwise hidden files. | |
327 | * undelete Show deleted files in lists. | |
328 | * adinicb Embed data in the inode (default) | |
329 | * noadinicb Don't embed data in the inode | |
330 | * shortad Use short ad's | |
331 | * longad Use long ad's (default) | |
332 | * nostrict Unset strict conformance | |
333 | * iocharset= Set the NLS character set | |
334 | * | |
335 | * The remaining are for debugging and disaster recovery: | |
336 | * | |
28de7948 | 337 | * novrs Skip volume sequence recognition |
1da177e4 LT |
338 | * |
339 | * The following expect a offset from 0. | |
340 | * | |
341 | * session= Set the CDROM session (default= last session) | |
342 | * anchor= Override standard anchor location. (default= 256) | |
343 | * volume= Override the VolumeDesc location. (unused) | |
344 | * partition= Override the PartitionDesc location. (unused) | |
345 | * lastblock= Set the last block of the filesystem/ | |
346 | * | |
347 | * The following expect a offset from the partition root. | |
348 | * | |
349 | * fileset= Override the fileset block location. (unused) | |
350 | * rootdir= Override the root directory location. (unused) | |
351 | * WARNING: overriding the rootdir to a non-directory may | |
352 | * yield highly unpredictable results. | |
353 | * | |
354 | * PRE-CONDITIONS | |
355 | * options Pointer to mount options string. | |
356 | * uopts Pointer to mount options variable. | |
357 | * | |
358 | * POST-CONDITIONS | |
359 | * <return> 1 Mount options parsed okay. | |
360 | * <return> 0 Error parsing mount options. | |
361 | * | |
362 | * HISTORY | |
363 | * July 1, 1997 - Andrew E. Mileski | |
364 | * Written, tested, and released. | |
365 | */ | |
28de7948 | 366 | |
1da177e4 LT |
367 | enum { |
368 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
369 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
370 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
371 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
372 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
4d6660eb | 373 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore |
1da177e4 LT |
374 | }; |
375 | ||
376 | static match_table_t tokens = { | |
28de7948 CG |
377 | {Opt_novrs, "novrs"}, |
378 | {Opt_nostrict, "nostrict"}, | |
379 | {Opt_bs, "bs=%u"}, | |
380 | {Opt_unhide, "unhide"}, | |
381 | {Opt_undelete, "undelete"}, | |
382 | {Opt_noadinicb, "noadinicb"}, | |
383 | {Opt_adinicb, "adinicb"}, | |
384 | {Opt_shortad, "shortad"}, | |
385 | {Opt_longad, "longad"}, | |
386 | {Opt_uforget, "uid=forget"}, | |
387 | {Opt_uignore, "uid=ignore"}, | |
388 | {Opt_gforget, "gid=forget"}, | |
389 | {Opt_gignore, "gid=ignore"}, | |
390 | {Opt_gid, "gid=%u"}, | |
391 | {Opt_uid, "uid=%u"}, | |
392 | {Opt_umask, "umask=%o"}, | |
393 | {Opt_session, "session=%u"}, | |
394 | {Opt_lastblock, "lastblock=%u"}, | |
395 | {Opt_anchor, "anchor=%u"}, | |
396 | {Opt_volume, "volume=%u"}, | |
397 | {Opt_partition, "partition=%u"}, | |
398 | {Opt_fileset, "fileset=%u"}, | |
399 | {Opt_rootdir, "rootdir=%u"}, | |
400 | {Opt_utf8, "utf8"}, | |
401 | {Opt_iocharset, "iocharset=%s"}, | |
402 | {Opt_err, NULL} | |
1da177e4 LT |
403 | }; |
404 | ||
6da80894 MS |
405 | static int udf_parse_options(char *options, struct udf_options *uopt, |
406 | bool remount) | |
1da177e4 LT |
407 | { |
408 | char *p; | |
409 | int option; | |
410 | ||
411 | uopt->novrs = 0; | |
6da80894 | 412 | uopt->blocksize = UDF_DEFAULT_BLOCKSIZE; |
1da177e4 LT |
413 | uopt->partition = 0xFFFF; |
414 | uopt->session = 0xFFFFFFFF; | |
415 | uopt->lastblock = 0; | |
416 | uopt->anchor = 0; | |
417 | uopt->volume = 0xFFFFFFFF; | |
418 | uopt->rootdir = 0xFFFFFFFF; | |
419 | uopt->fileset = 0xFFFFFFFF; | |
420 | uopt->nls_map = NULL; | |
421 | ||
422 | if (!options) | |
423 | return 1; | |
424 | ||
cb00ea35 | 425 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
426 | substring_t args[MAX_OPT_ARGS]; |
427 | int token; | |
428 | if (!*p) | |
429 | continue; | |
430 | ||
431 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
432 | switch (token) { |
433 | case Opt_novrs: | |
434 | uopt->novrs = 1; | |
435 | case Opt_bs: | |
436 | if (match_int(&args[0], &option)) | |
437 | return 0; | |
438 | uopt->blocksize = option; | |
439 | break; | |
440 | case Opt_unhide: | |
441 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
442 | break; | |
443 | case Opt_undelete: | |
444 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
445 | break; | |
446 | case Opt_noadinicb: | |
447 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
448 | break; | |
449 | case Opt_adinicb: | |
450 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
451 | break; | |
452 | case Opt_shortad: | |
453 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
454 | break; | |
455 | case Opt_longad: | |
456 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
457 | break; | |
458 | case Opt_gid: | |
459 | if (match_int(args, &option)) | |
460 | return 0; | |
461 | uopt->gid = option; | |
ca76d2d8 | 462 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
463 | break; |
464 | case Opt_uid: | |
465 | if (match_int(args, &option)) | |
466 | return 0; | |
467 | uopt->uid = option; | |
ca76d2d8 | 468 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
469 | break; |
470 | case Opt_umask: | |
471 | if (match_octal(args, &option)) | |
472 | return 0; | |
473 | uopt->umask = option; | |
474 | break; | |
475 | case Opt_nostrict: | |
476 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
477 | break; | |
478 | case Opt_session: | |
479 | if (match_int(args, &option)) | |
480 | return 0; | |
481 | uopt->session = option; | |
6da80894 MS |
482 | if (!remount) |
483 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
484 | break; |
485 | case Opt_lastblock: | |
486 | if (match_int(args, &option)) | |
487 | return 0; | |
488 | uopt->lastblock = option; | |
6da80894 MS |
489 | if (!remount) |
490 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
491 | break; |
492 | case Opt_anchor: | |
493 | if (match_int(args, &option)) | |
494 | return 0; | |
495 | uopt->anchor = option; | |
496 | break; | |
497 | case Opt_volume: | |
498 | if (match_int(args, &option)) | |
499 | return 0; | |
500 | uopt->volume = option; | |
501 | break; | |
502 | case Opt_partition: | |
503 | if (match_int(args, &option)) | |
504 | return 0; | |
505 | uopt->partition = option; | |
506 | break; | |
507 | case Opt_fileset: | |
508 | if (match_int(args, &option)) | |
509 | return 0; | |
510 | uopt->fileset = option; | |
511 | break; | |
512 | case Opt_rootdir: | |
513 | if (match_int(args, &option)) | |
514 | return 0; | |
515 | uopt->rootdir = option; | |
516 | break; | |
517 | case Opt_utf8: | |
518 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
519 | break; | |
1da177e4 | 520 | #ifdef CONFIG_UDF_NLS |
cb00ea35 CG |
521 | case Opt_iocharset: |
522 | uopt->nls_map = load_nls(args[0].from); | |
523 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
524 | break; | |
1da177e4 | 525 | #endif |
cb00ea35 CG |
526 | case Opt_uignore: |
527 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); | |
528 | break; | |
529 | case Opt_uforget: | |
530 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
531 | break; | |
532 | case Opt_gignore: | |
533 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); | |
534 | break; | |
535 | case Opt_gforget: | |
536 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
537 | break; | |
538 | default: | |
539 | printk(KERN_ERR "udf: bad mount option \"%s\" " | |
540 | "or missing value\n", p); | |
1da177e4 LT |
541 | return 0; |
542 | } | |
543 | } | |
544 | return 1; | |
545 | } | |
546 | ||
bd45a420 | 547 | static void udf_write_super(struct super_block *sb) |
1da177e4 LT |
548 | { |
549 | lock_kernel(); | |
28de7948 | 550 | |
1da177e4 LT |
551 | if (!(sb->s_flags & MS_RDONLY)) |
552 | udf_open_lvid(sb); | |
553 | sb->s_dirt = 0; | |
28de7948 | 554 | |
1da177e4 LT |
555 | unlock_kernel(); |
556 | } | |
557 | ||
cb00ea35 | 558 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
559 | { |
560 | struct udf_options uopt; | |
6c79e987 | 561 | struct udf_sb_info *sbi = UDF_SB(sb); |
1da177e4 | 562 | |
6c79e987 MS |
563 | uopt.flags = sbi->s_flags; |
564 | uopt.uid = sbi->s_uid; | |
565 | uopt.gid = sbi->s_gid; | |
566 | uopt.umask = sbi->s_umask; | |
1da177e4 | 567 | |
6da80894 | 568 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
569 | return -EINVAL; |
570 | ||
6c79e987 MS |
571 | sbi->s_flags = uopt.flags; |
572 | sbi->s_uid = uopt.uid; | |
573 | sbi->s_gid = uopt.gid; | |
574 | sbi->s_umask = uopt.umask; | |
1da177e4 | 575 | |
6c79e987 MS |
576 | if (sbi->s_lvid_bh) { |
577 | int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); | |
1da177e4 LT |
578 | if (write_rev > UDF_MAX_WRITE_VERSION) |
579 | *flags |= MS_RDONLY; | |
580 | } | |
581 | ||
582 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
583 | return 0; | |
584 | if (*flags & MS_RDONLY) | |
585 | udf_close_lvid(sb); | |
586 | else | |
587 | udf_open_lvid(sb); | |
588 | ||
589 | return 0; | |
590 | } | |
591 | ||
cb00ea35 | 592 | static int udf_vrs(struct super_block *sb, int silent) |
1da177e4 LT |
593 | { |
594 | struct volStructDesc *vsd = NULL; | |
595 | int sector = 32768; | |
596 | int sectorsize; | |
597 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
598 | int iso9660 = 0; |
599 | int nsr02 = 0; | |
600 | int nsr03 = 0; | |
6c79e987 | 601 | struct udf_sb_info *sbi; |
1da177e4 LT |
602 | |
603 | /* Block size must be a multiple of 512 */ | |
604 | if (sb->s_blocksize & 511) | |
605 | return 0; | |
6c79e987 | 606 | sbi = UDF_SB(sb); |
1da177e4 LT |
607 | |
608 | if (sb->s_blocksize < sizeof(struct volStructDesc)) | |
609 | sectorsize = sizeof(struct volStructDesc); | |
610 | else | |
611 | sectorsize = sb->s_blocksize; | |
612 | ||
6c79e987 | 613 | sector += (sbi->s_session << sb->s_blocksize_bits); |
1da177e4 LT |
614 | |
615 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
cb00ea35 | 616 | (sector >> sb->s_blocksize_bits), sb->s_blocksize); |
1da177e4 | 617 | /* Process the sequence (if applicable) */ |
cb00ea35 | 618 | for (; !nsr02 && !nsr03; sector += sectorsize) { |
1da177e4 LT |
619 | /* Read a block */ |
620 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
621 | if (!bh) | |
622 | break; | |
623 | ||
624 | /* Look for ISO descriptors */ | |
625 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 626 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 627 | |
cb00ea35 | 628 | if (vsd->stdIdent[0] == 0) { |
3bf25cb4 | 629 | brelse(bh); |
1da177e4 | 630 | break; |
3a71fc5d MS |
631 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
632 | VSD_STD_ID_LEN)) { | |
1da177e4 | 633 | iso9660 = sector; |
cb00ea35 CG |
634 | switch (vsd->structType) { |
635 | case 0: | |
636 | udf_debug("ISO9660 Boot Record found\n"); | |
637 | break; | |
638 | case 1: | |
3a71fc5d MS |
639 | udf_debug("ISO9660 Primary Volume Descriptor " |
640 | "found\n"); | |
cb00ea35 CG |
641 | break; |
642 | case 2: | |
3a71fc5d MS |
643 | udf_debug("ISO9660 Supplementary Volume " |
644 | "Descriptor found\n"); | |
cb00ea35 CG |
645 | break; |
646 | case 3: | |
3a71fc5d MS |
647 | udf_debug("ISO9660 Volume Partition Descriptor " |
648 | "found\n"); | |
cb00ea35 CG |
649 | break; |
650 | case 255: | |
3a71fc5d MS |
651 | udf_debug("ISO9660 Volume Descriptor Set " |
652 | "Terminator found\n"); | |
cb00ea35 CG |
653 | break; |
654 | default: | |
655 | udf_debug("ISO9660 VRS (%u) found\n", | |
656 | vsd->structType); | |
657 | break; | |
1da177e4 | 658 | } |
3a71fc5d MS |
659 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
660 | VSD_STD_ID_LEN)) | |
661 | ; /* nothing */ | |
662 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
663 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 664 | brelse(bh); |
1da177e4 | 665 | break; |
3a71fc5d MS |
666 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
667 | VSD_STD_ID_LEN)) | |
1da177e4 | 668 | nsr02 = sector; |
3a71fc5d MS |
669 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
670 | VSD_STD_ID_LEN)) | |
1da177e4 | 671 | nsr03 = sector; |
3bf25cb4 | 672 | brelse(bh); |
1da177e4 LT |
673 | } |
674 | ||
675 | if (nsr03) | |
676 | return nsr03; | |
677 | else if (nsr02) | |
678 | return nsr02; | |
6c79e987 | 679 | else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) |
1da177e4 LT |
680 | return -1; |
681 | else | |
682 | return 0; | |
683 | } | |
684 | ||
685 | /* | |
686 | * udf_find_anchor | |
687 | * | |
688 | * PURPOSE | |
689 | * Find an anchor volume descriptor. | |
690 | * | |
691 | * PRE-CONDITIONS | |
692 | * sb Pointer to _locked_ superblock. | |
693 | * lastblock Last block on media. | |
694 | * | |
695 | * POST-CONDITIONS | |
696 | * <return> 1 if not found, 0 if ok | |
697 | * | |
698 | * HISTORY | |
699 | * July 1, 1997 - Andrew E. Mileski | |
700 | * Written, tested, and released. | |
701 | */ | |
cb00ea35 | 702 | static void udf_find_anchor(struct super_block *sb) |
1da177e4 | 703 | { |
6c79e987 | 704 | int lastblock; |
1da177e4 LT |
705 | struct buffer_head *bh = NULL; |
706 | uint16_t ident; | |
707 | uint32_t location; | |
708 | int i; | |
6c79e987 MS |
709 | struct udf_sb_info *sbi; |
710 | ||
711 | sbi = UDF_SB(sb); | |
712 | lastblock = sbi->s_last_block; | |
1da177e4 | 713 | |
cb00ea35 | 714 | if (lastblock) { |
1da177e4 | 715 | int varlastblock = udf_variable_to_fixed(lastblock); |
28de7948 CG |
716 | int last[] = { lastblock, lastblock - 2, |
717 | lastblock - 150, lastblock - 152, | |
718 | varlastblock, varlastblock - 2, | |
719 | varlastblock - 150, varlastblock - 152 }; | |
1da177e4 LT |
720 | |
721 | lastblock = 0; | |
722 | ||
723 | /* Search for an anchor volume descriptor pointer */ | |
724 | ||
725 | /* according to spec, anchor is in either: | |
726 | * block 256 | |
727 | * lastblock-256 | |
728 | * lastblock | |
729 | * however, if the disc isn't closed, it could be 512 */ | |
730 | ||
e8c96f8c | 731 | for (i = 0; !lastblock && i < ARRAY_SIZE(last); i++) { |
3a71fc5d MS |
732 | ident = location = 0; |
733 | if (last[i] >= 0) { | |
734 | bh = sb_bread(sb, last[i]); | |
735 | if (bh) { | |
736 | tag *t = (tag *)bh->b_data; | |
737 | ident = le16_to_cpu(t->tagIdent); | |
738 | location = le32_to_cpu(t->tagLocation); | |
739 | brelse(bh); | |
740 | } | |
1da177e4 | 741 | } |
e8c96f8c | 742 | |
cb00ea35 | 743 | if (ident == TAG_IDENT_AVDP) { |
6c79e987 MS |
744 | if (location == last[i] - sbi->s_session) { |
745 | lastblock = last[i] - sbi->s_session; | |
746 | sbi->s_anchor[0] = lastblock; | |
747 | sbi->s_anchor[1] = lastblock - 256; | |
4b11111a MS |
748 | } else if (location == |
749 | udf_variable_to_fixed(last[i]) - | |
750 | sbi->s_session) { | |
1da177e4 | 751 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); |
4b11111a MS |
752 | lastblock = |
753 | udf_variable_to_fixed(last[i]) - | |
754 | sbi->s_session; | |
6c79e987 | 755 | sbi->s_anchor[0] = lastblock; |
4b11111a MS |
756 | sbi->s_anchor[1] = lastblock - 256 - |
757 | sbi->s_session; | |
28de7948 | 758 | } else { |
4b11111a MS |
759 | udf_debug("Anchor found at block %d, " |
760 | "location mismatch %d.\n", | |
28de7948 CG |
761 | last[i], location); |
762 | } | |
4b11111a MS |
763 | } else if (ident == TAG_IDENT_FE || |
764 | ident == TAG_IDENT_EFE) { | |
1da177e4 | 765 | lastblock = last[i]; |
6c79e987 | 766 | sbi->s_anchor[3] = 512; |
cb00ea35 | 767 | } else { |
3a71fc5d MS |
768 | ident = location = 0; |
769 | if (last[i] >= 256) { | |
770 | bh = sb_bread(sb, last[i] - 256); | |
771 | if (bh) { | |
772 | tag *t = (tag *)bh->b_data; | |
4b11111a MS |
773 | ident = le16_to_cpu( |
774 | t->tagIdent); | |
775 | location = le32_to_cpu( | |
776 | t->tagLocation); | |
3a71fc5d MS |
777 | brelse(bh); |
778 | } | |
1da177e4 | 779 | } |
cb00ea35 | 780 | |
1da177e4 | 781 | if (ident == TAG_IDENT_AVDP && |
4b11111a MS |
782 | location == last[i] - 256 - |
783 | sbi->s_session) { | |
1da177e4 | 784 | lastblock = last[i]; |
6c79e987 | 785 | sbi->s_anchor[1] = last[i] - 256; |
cb00ea35 | 786 | } else { |
3a71fc5d | 787 | ident = location = 0; |
6c79e987 | 788 | if (last[i] >= 312 + sbi->s_session) { |
4b11111a MS |
789 | bh = sb_bread(sb, |
790 | last[i] - 312 - | |
791 | sbi->s_session); | |
3a71fc5d | 792 | if (bh) { |
4b11111a MS |
793 | tag *t = (tag *) |
794 | bh->b_data; | |
795 | ident = le16_to_cpu( | |
796 | t->tagIdent); | |
797 | location = le32_to_cpu( | |
798 | t->tagLocation); | |
3a71fc5d MS |
799 | brelse(bh); |
800 | } | |
1da177e4 | 801 | } |
cb00ea35 | 802 | |
1da177e4 | 803 | if (ident == TAG_IDENT_AVDP && |
28de7948 | 804 | location == udf_variable_to_fixed(last[i]) - 256) { |
4b11111a MS |
805 | UDF_SET_FLAG(sb, |
806 | UDF_FLAG_VARCONV); | |
28de7948 | 807 | lastblock = udf_variable_to_fixed(last[i]); |
6c79e987 | 808 | sbi->s_anchor[1] = lastblock - 256; |
1da177e4 LT |
809 | } |
810 | } | |
811 | } | |
812 | } | |
813 | } | |
814 | ||
cb00ea35 | 815 | if (!lastblock) { |
3a71fc5d | 816 | /* We haven't found the lastblock. check 312 */ |
6c79e987 | 817 | bh = sb_bread(sb, 312 + sbi->s_session); |
3a71fc5d MS |
818 | if (bh) { |
819 | tag *t = (tag *)bh->b_data; | |
820 | ident = le16_to_cpu(t->tagIdent); | |
821 | location = le32_to_cpu(t->tagLocation); | |
3bf25cb4 | 822 | brelse(bh); |
1da177e4 LT |
823 | |
824 | if (ident == TAG_IDENT_AVDP && location == 256) | |
825 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
826 | } | |
827 | } | |
828 | ||
6c79e987 MS |
829 | for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) { |
830 | if (sbi->s_anchor[i]) { | |
831 | bh = udf_read_tagged(sb, sbi->s_anchor[i], | |
832 | sbi->s_anchor[i], &ident); | |
3a71fc5d | 833 | if (!bh) |
6c79e987 | 834 | sbi->s_anchor[i] = 0; |
3a71fc5d | 835 | else { |
3bf25cb4 | 836 | brelse(bh); |
28de7948 | 837 | if ((ident != TAG_IDENT_AVDP) && |
4b11111a MS |
838 | (i || (ident != TAG_IDENT_FE && |
839 | ident != TAG_IDENT_EFE))) | |
6c79e987 | 840 | sbi->s_anchor[i] = 0; |
1da177e4 LT |
841 | } |
842 | } | |
843 | } | |
844 | ||
6c79e987 | 845 | sbi->s_last_block = lastblock; |
1da177e4 LT |
846 | } |
847 | ||
3a71fc5d MS |
848 | static int udf_find_fileset(struct super_block *sb, |
849 | kernel_lb_addr *fileset, | |
850 | kernel_lb_addr *root) | |
1da177e4 LT |
851 | { |
852 | struct buffer_head *bh = NULL; | |
853 | long lastblock; | |
854 | uint16_t ident; | |
6c79e987 | 855 | struct udf_sb_info *sbi; |
1da177e4 LT |
856 | |
857 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 858 | fileset->partitionReferenceNum != 0xFFFF) { |
1da177e4 LT |
859 | bh = udf_read_ptagged(sb, *fileset, 0, &ident); |
860 | ||
28de7948 | 861 | if (!bh) { |
1da177e4 | 862 | return 1; |
28de7948 | 863 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 864 | brelse(bh); |
1da177e4 LT |
865 | return 1; |
866 | } | |
cb00ea35 | 867 | |
1da177e4 LT |
868 | } |
869 | ||
6c79e987 | 870 | sbi = UDF_SB(sb); |
3a71fc5d MS |
871 | if (!bh) { |
872 | /* Search backwards through the partitions */ | |
1da177e4 LT |
873 | kernel_lb_addr newfileset; |
874 | ||
28de7948 | 875 | /* --> cvg: FIXME - is it reasonable? */ |
1da177e4 | 876 | return 1; |
cb00ea35 | 877 | |
6c79e987 | 878 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
cb00ea35 CG |
879 | (newfileset.partitionReferenceNum != 0xFFFF && |
880 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
881 | fileset->partitionReferenceNum == 0xFFFF); | |
882 | newfileset.partitionReferenceNum--) { | |
6c79e987 MS |
883 | lastblock = sbi->s_partmaps |
884 | [newfileset.partitionReferenceNum] | |
885 | .s_partition_len; | |
1da177e4 LT |
886 | newfileset.logicalBlockNum = 0; |
887 | ||
cb00ea35 | 888 | do { |
3a71fc5d MS |
889 | bh = udf_read_ptagged(sb, newfileset, 0, |
890 | &ident); | |
cb00ea35 CG |
891 | if (!bh) { |
892 | newfileset.logicalBlockNum++; | |
1da177e4 LT |
893 | continue; |
894 | } | |
895 | ||
cb00ea35 CG |
896 | switch (ident) { |
897 | case TAG_IDENT_SBD: | |
28de7948 CG |
898 | { |
899 | struct spaceBitmapDesc *sp; | |
4b11111a MS |
900 | sp = (struct spaceBitmapDesc *) |
901 | bh->b_data; | |
28de7948 CG |
902 | newfileset.logicalBlockNum += 1 + |
903 | ((le32_to_cpu(sp->numOfBytes) + | |
4b11111a MS |
904 | sizeof(struct spaceBitmapDesc) |
905 | - 1) >> sb->s_blocksize_bits); | |
28de7948 CG |
906 | brelse(bh); |
907 | break; | |
908 | } | |
cb00ea35 | 909 | case TAG_IDENT_FSD: |
28de7948 CG |
910 | *fileset = newfileset; |
911 | break; | |
cb00ea35 | 912 | default: |
28de7948 CG |
913 | newfileset.logicalBlockNum++; |
914 | brelse(bh); | |
915 | bh = NULL; | |
916 | break; | |
1da177e4 | 917 | } |
28de7948 CG |
918 | } while (newfileset.logicalBlockNum < lastblock && |
919 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
920 | fileset->partitionReferenceNum == 0xFFFF); | |
1da177e4 LT |
921 | } |
922 | } | |
923 | ||
924 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 925 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
1da177e4 | 926 | udf_debug("Fileset at block=%d, partition=%d\n", |
cb00ea35 CG |
927 | fileset->logicalBlockNum, |
928 | fileset->partitionReferenceNum); | |
1da177e4 | 929 | |
6c79e987 | 930 | sbi->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 931 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 932 | brelse(bh); |
1da177e4 LT |
933 | return 0; |
934 | } | |
935 | return 1; | |
936 | } | |
937 | ||
cb00ea35 | 938 | static void udf_load_pvoldesc(struct super_block *sb, struct buffer_head *bh) |
1da177e4 LT |
939 | { |
940 | struct primaryVolDesc *pvoldesc; | |
1da177e4 LT |
941 | struct ustr instr; |
942 | struct ustr outstr; | |
943 | ||
944 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
945 | ||
cbf5676a | 946 | if (udf_stamp_to_time(&UDF_SB(sb)->s_record_time, |
cb00ea35 | 947 | lets_to_cpu(pvoldesc->recordingDateAndTime))) { |
1da177e4 LT |
948 | kernel_timestamp ts; |
949 | ts = lets_to_cpu(pvoldesc->recordingDateAndTime); | |
cbf5676a | 950 | udf_debug("recording time %04u/%02u/%02u" |
3a71fc5d | 951 | " %02u:%02u (%x)\n", |
28de7948 CG |
952 | ts.year, ts.month, ts.day, ts.hour, |
953 | ts.minute, ts.typeAndTimezone); | |
1da177e4 LT |
954 | } |
955 | ||
4b11111a | 956 | if (!udf_build_ustr(&instr, pvoldesc->volIdent, 32)) |
cb00ea35 | 957 | if (udf_CS0toUTF8(&outstr, &instr)) { |
6c79e987 | 958 | strncpy(UDF_SB(sb)->s_volume_ident, outstr.u_name, |
1da177e4 | 959 | outstr.u_len > 31 ? 31 : outstr.u_len); |
4b11111a MS |
960 | udf_debug("volIdent[] = '%s'\n", |
961 | UDF_SB(sb)->s_volume_ident); | |
1da177e4 | 962 | } |
1da177e4 | 963 | |
4b11111a | 964 | if (!udf_build_ustr(&instr, pvoldesc->volSetIdent, 128)) |
1da177e4 LT |
965 | if (udf_CS0toUTF8(&outstr, &instr)) |
966 | udf_debug("volSetIdent[] = '%s'\n", outstr.u_name); | |
1da177e4 LT |
967 | } |
968 | ||
28de7948 CG |
969 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
970 | kernel_lb_addr *root) | |
1da177e4 LT |
971 | { |
972 | struct fileSetDesc *fset; | |
973 | ||
974 | fset = (struct fileSetDesc *)bh->b_data; | |
975 | ||
976 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
977 | ||
6c79e987 | 978 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 979 | |
cb00ea35 CG |
980 | udf_debug("Rootdir at block=%d, partition=%d\n", |
981 | root->logicalBlockNum, root->partitionReferenceNum); | |
1da177e4 LT |
982 | } |
983 | ||
883cb9d1 MS |
984 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
985 | { | |
986 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
987 | return DIV_ROUND_UP(map->s_partition_len + |
988 | (sizeof(struct spaceBitmapDesc) << 3), | |
989 | sb->s_blocksize * 8); | |
883cb9d1 MS |
990 | } |
991 | ||
66e1da3f MS |
992 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
993 | { | |
66e1da3f MS |
994 | struct udf_bitmap *bitmap; |
995 | int nr_groups; | |
996 | int size; | |
997 | ||
883cb9d1 | 998 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
999 | size = sizeof(struct udf_bitmap) + |
1000 | (sizeof(struct buffer_head *) * nr_groups); | |
1001 | ||
1002 | if (size <= PAGE_SIZE) | |
1003 | bitmap = kmalloc(size, GFP_KERNEL); | |
1004 | else | |
1005 | bitmap = vmalloc(size); /* TODO: get rid of vmalloc */ | |
1006 | ||
1007 | if (bitmap == NULL) { | |
1008 | udf_error(sb, __FUNCTION__, | |
1009 | "Unable to allocate space for bitmap " | |
1010 | "and %d buffer_head pointers", nr_groups); | |
1011 | return NULL; | |
1012 | } | |
1013 | ||
1014 | memset(bitmap, 0x00, size); | |
1015 | bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); | |
1016 | bitmap->s_nr_groups = nr_groups; | |
1017 | return bitmap; | |
1018 | } | |
1019 | ||
bcec4477 | 1020 | static int udf_load_partdesc(struct super_block *sb, struct buffer_head *bh) |
1da177e4 LT |
1021 | { |
1022 | struct partitionDesc *p; | |
1023 | int i; | |
6c79e987 MS |
1024 | struct udf_part_map *map; |
1025 | struct udf_sb_info *sbi; | |
1da177e4 LT |
1026 | |
1027 | p = (struct partitionDesc *)bh->b_data; | |
6c79e987 | 1028 | sbi = UDF_SB(sb); |
1da177e4 | 1029 | |
6c79e987 MS |
1030 | for (i = 0; i < sbi->s_partitions; i++) { |
1031 | map = &sbi->s_partmaps[i]; | |
cb00ea35 | 1032 | udf_debug("Searching map: (%d == %d)\n", |
4b11111a MS |
1033 | map->s_partition_num, |
1034 | le16_to_cpu(p->partitionNumber)); | |
1035 | if (map->s_partition_num == | |
1036 | le16_to_cpu(p->partitionNumber)) { | |
1037 | map->s_partition_len = | |
1038 | le32_to_cpu(p->partitionLength); /* blocks */ | |
1039 | map->s_partition_root = | |
1040 | le32_to_cpu(p->partitionStartingLocation); | |
5e0f0017 MS |
1041 | if (p->accessType == |
1042 | cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
4b11111a MS |
1043 | map->s_partition_flags |= |
1044 | UDF_PART_FLAG_READ_ONLY; | |
5e0f0017 MS |
1045 | if (p->accessType == |
1046 | cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
4b11111a MS |
1047 | map->s_partition_flags |= |
1048 | UDF_PART_FLAG_WRITE_ONCE; | |
5e0f0017 MS |
1049 | if (p->accessType == |
1050 | cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
4b11111a MS |
1051 | map->s_partition_flags |= |
1052 | UDF_PART_FLAG_REWRITABLE; | |
5e0f0017 MS |
1053 | if (p->accessType == |
1054 | cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
4b11111a MS |
1055 | map->s_partition_flags |= |
1056 | UDF_PART_FLAG_OVERWRITABLE; | |
28de7948 | 1057 | |
3a71fc5d MS |
1058 | if (!strcmp(p->partitionContents.ident, |
1059 | PD_PARTITION_CONTENTS_NSR02) || | |
1060 | !strcmp(p->partitionContents.ident, | |
1061 | PD_PARTITION_CONTENTS_NSR03)) { | |
1da177e4 LT |
1062 | struct partitionHeaderDesc *phd; |
1063 | ||
4b11111a MS |
1064 | phd = (struct partitionHeaderDesc *) |
1065 | (p->partitionContentsUse); | |
cb00ea35 | 1066 | if (phd->unallocSpaceTable.extLength) { |
28de7948 CG |
1067 | kernel_lb_addr loc = { |
1068 | .logicalBlockNum = le32_to_cpu(phd->unallocSpaceTable.extPosition), | |
1069 | .partitionReferenceNum = i, | |
1070 | }; | |
1071 | ||
6c79e987 | 1072 | map->s_uspace.s_table = |
28de7948 | 1073 | udf_iget(sb, loc); |
6c79e987 | 1074 | if (!map->s_uspace.s_table) { |
b1e7a4b1 | 1075 | udf_debug("cannot load unallocSpaceTable (part %d)\n", i); |
bcec4477 JK |
1076 | return 1; |
1077 | } | |
4b11111a MS |
1078 | map->s_partition_flags |= |
1079 | UDF_PART_FLAG_UNALLOC_TABLE; | |
28de7948 | 1080 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", |
6c79e987 | 1081 | i, map->s_uspace.s_table->i_ino); |
1da177e4 | 1082 | } |
cb00ea35 | 1083 | if (phd->unallocSpaceBitmap.extLength) { |
4b11111a MS |
1084 | struct udf_bitmap *bitmap = |
1085 | udf_sb_alloc_bitmap(sb, i); | |
1086 | map->s_uspace.s_bitmap = bitmap; | |
1087 | if (bitmap != NULL) { | |
1088 | bitmap->s_extLength = | |
28de7948 | 1089 | le32_to_cpu(phd->unallocSpaceBitmap.extLength); |
4b11111a | 1090 | bitmap->s_extPosition = |
28de7948 | 1091 | le32_to_cpu(phd->unallocSpaceBitmap.extPosition); |
6c79e987 | 1092 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
28de7948 | 1093 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", |
4b11111a | 1094 | i, bitmap->s_extPosition); |
1da177e4 LT |
1095 | } |
1096 | } | |
1097 | if (phd->partitionIntegrityTable.extLength) | |
28de7948 | 1098 | udf_debug("partitionIntegrityTable (part %d)\n", i); |
cb00ea35 | 1099 | if (phd->freedSpaceTable.extLength) { |
28de7948 CG |
1100 | kernel_lb_addr loc = { |
1101 | .logicalBlockNum = le32_to_cpu(phd->freedSpaceTable.extPosition), | |
1102 | .partitionReferenceNum = i, | |
1103 | }; | |
1104 | ||
6c79e987 | 1105 | map->s_fspace.s_table = |
28de7948 | 1106 | udf_iget(sb, loc); |
6c79e987 | 1107 | if (!map->s_fspace.s_table) { |
b1e7a4b1 | 1108 | udf_debug("cannot load freedSpaceTable (part %d)\n", i); |
bcec4477 JK |
1109 | return 1; |
1110 | } | |
4b11111a MS |
1111 | map->s_partition_flags |= |
1112 | UDF_PART_FLAG_FREED_TABLE; | |
28de7948 | 1113 | udf_debug("freedSpaceTable (part %d) @ %ld\n", |
6c79e987 | 1114 | i, map->s_fspace.s_table->i_ino); |
1da177e4 | 1115 | } |
cb00ea35 | 1116 | if (phd->freedSpaceBitmap.extLength) { |
4b11111a MS |
1117 | struct udf_bitmap *bitmap = |
1118 | udf_sb_alloc_bitmap(sb, i); | |
1119 | map->s_fspace.s_bitmap = bitmap; | |
1120 | if (bitmap != NULL) { | |
1121 | bitmap->s_extLength = | |
28de7948 | 1122 | le32_to_cpu(phd->freedSpaceBitmap.extLength); |
4b11111a | 1123 | bitmap->s_extPosition = |
28de7948 | 1124 | le32_to_cpu(phd->freedSpaceBitmap.extPosition); |
6c79e987 | 1125 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
28de7948 | 1126 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", |
4b11111a | 1127 | i, bitmap->s_extPosition); |
1da177e4 LT |
1128 | } |
1129 | } | |
1130 | } | |
1131 | break; | |
1132 | } | |
1133 | } | |
4b11111a | 1134 | if (i == sbi->s_partitions) |
cb00ea35 CG |
1135 | udf_debug("Partition (%d) not found in partition map\n", |
1136 | le16_to_cpu(p->partitionNumber)); | |
4b11111a | 1137 | else |
3a71fc5d MS |
1138 | udf_debug("Partition (%d:%d type %x) starts at physical %d, " |
1139 | "block length %d\n", | |
1140 | le16_to_cpu(p->partitionNumber), i, | |
6c79e987 MS |
1141 | map->s_partition_type, |
1142 | map->s_partition_root, | |
1143 | map->s_partition_len); | |
bcec4477 | 1144 | return 0; |
1da177e4 LT |
1145 | } |
1146 | ||
28de7948 CG |
1147 | static int udf_load_logicalvol(struct super_block *sb, struct buffer_head *bh, |
1148 | kernel_lb_addr *fileset) | |
1da177e4 LT |
1149 | { |
1150 | struct logicalVolDesc *lvd; | |
1151 | int i, j, offset; | |
1152 | uint8_t type; | |
6c79e987 | 1153 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1154 | struct genericPartitionMap *gpm; |
1da177e4 LT |
1155 | |
1156 | lvd = (struct logicalVolDesc *)bh->b_data; | |
1157 | ||
dc5d39be MS |
1158 | i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
1159 | if (i != 0) | |
1160 | return i; | |
1da177e4 | 1161 | |
cb00ea35 | 1162 | for (i = 0, offset = 0; |
6c79e987 | 1163 | i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength); |
4b11111a MS |
1164 | i++, offset += gpm->partitionMapLength) { |
1165 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1166 | gpm = (struct genericPartitionMap *) | |
1167 | &(lvd->partitionMaps[offset]); | |
1168 | type = gpm->partitionMapType; | |
cb00ea35 | 1169 | if (type == 1) { |
4b11111a MS |
1170 | struct genericPartitionMap1 *gpm1 = |
1171 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1172 | map->s_partition_type = UDF_TYPE1_MAP15; |
1173 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1174 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1175 | map->s_partition_func = NULL; | |
cb00ea35 | 1176 | } else if (type == 2) { |
4b11111a MS |
1177 | struct udfPartitionMap2 *upm2 = |
1178 | (struct udfPartitionMap2 *)gpm; | |
1179 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1180 | strlen(UDF_ID_VIRTUAL))) { | |
1181 | u16 suf = | |
1182 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1183 | identSuffix)[0]); | |
1184 | if (suf == 0x0150) { | |
1185 | map->s_partition_type = | |
1186 | UDF_VIRTUAL_MAP15; | |
1187 | map->s_partition_func = | |
1188 | udf_get_pblock_virt15; | |
1189 | } else if (suf == 0x0200) { | |
1190 | map->s_partition_type = | |
1191 | UDF_VIRTUAL_MAP20; | |
1192 | map->s_partition_func = | |
1193 | udf_get_pblock_virt20; | |
1da177e4 | 1194 | } |
4b11111a MS |
1195 | } else if (!strncmp(upm2->partIdent.ident, |
1196 | UDF_ID_SPARABLE, | |
1197 | strlen(UDF_ID_SPARABLE))) { | |
1da177e4 LT |
1198 | uint32_t loc; |
1199 | uint16_t ident; | |
1200 | struct sparingTable *st; | |
4b11111a MS |
1201 | struct sparablePartitionMap *spm = |
1202 | (struct sparablePartitionMap *)gpm; | |
28de7948 | 1203 | |
6c79e987 | 1204 | map->s_partition_type = UDF_SPARABLE_MAP15; |
4b11111a MS |
1205 | map->s_type_specific.s_sparing.s_packet_len = |
1206 | le16_to_cpu(spm->packetLength); | |
cb00ea35 | 1207 | for (j = 0; j < spm->numSparingTables; j++) { |
4b11111a MS |
1208 | struct buffer_head *bh2; |
1209 | ||
1210 | loc = le32_to_cpu( | |
1211 | spm->locSparingTable[j]); | |
1212 | bh2 = udf_read_tagged(sb, loc, loc, | |
1213 | &ident); | |
1214 | map->s_type_specific.s_sparing. | |
1215 | s_spar_map[j] = bh2; | |
1216 | ||
1217 | if (bh2 != NULL) { | |
1218 | st = (struct sparingTable *) | |
1219 | bh2->b_data; | |
1220 | if (ident != 0 || strncmp( | |
1221 | st->sparingIdent.ident, | |
1222 | UDF_ID_SPARING, | |
1223 | strlen(UDF_ID_SPARING))) { | |
1224 | brelse(bh2); | |
1225 | map->s_type_specific. | |
1226 | s_sparing. | |
1227 | s_spar_map[j] = | |
1228 | NULL; | |
1da177e4 LT |
1229 | } |
1230 | } | |
1231 | } | |
6c79e987 | 1232 | map->s_partition_func = udf_get_pblock_spar15; |
cb00ea35 | 1233 | } else { |
3a71fc5d MS |
1234 | udf_debug("Unknown ident: %s\n", |
1235 | upm2->partIdent.ident); | |
1da177e4 LT |
1236 | continue; |
1237 | } | |
6c79e987 MS |
1238 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1239 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 LT |
1240 | } |
1241 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
6c79e987 MS |
1242 | i, map->s_partition_num, type, |
1243 | map->s_volumeseqnum); | |
1da177e4 LT |
1244 | } |
1245 | ||
cb00ea35 | 1246 | if (fileset) { |
28de7948 | 1247 | long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1248 | |
1249 | *fileset = lelb_to_cpu(la->extLocation); | |
3a71fc5d MS |
1250 | udf_debug("FileSet found in LogicalVolDesc at block=%d, " |
1251 | "partition=%d\n", fileset->logicalBlockNum, | |
28de7948 | 1252 | fileset->partitionReferenceNum); |
1da177e4 LT |
1253 | } |
1254 | if (lvd->integritySeqExt.extLength) | |
1255 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
28de7948 | 1256 | |
1da177e4 LT |
1257 | return 0; |
1258 | } | |
1259 | ||
1260 | /* | |
1261 | * udf_load_logicalvolint | |
1262 | * | |
1263 | */ | |
cb00ea35 | 1264 | static void udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc) |
1da177e4 LT |
1265 | { |
1266 | struct buffer_head *bh = NULL; | |
1267 | uint16_t ident; | |
6c79e987 MS |
1268 | struct udf_sb_info *sbi = UDF_SB(sb); |
1269 | struct logicalVolIntegrityDesc *lvid; | |
1da177e4 LT |
1270 | |
1271 | while (loc.extLength > 0 && | |
cb00ea35 CG |
1272 | (bh = udf_read_tagged(sb, loc.extLocation, |
1273 | loc.extLocation, &ident)) && | |
1274 | ident == TAG_IDENT_LVID) { | |
6c79e987 MS |
1275 | sbi->s_lvid_bh = bh; |
1276 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
cb00ea35 | 1277 | |
6c79e987 | 1278 | if (lvid->nextIntegrityExt.extLength) |
3a71fc5d | 1279 | udf_load_logicalvolint(sb, |
6c79e987 | 1280 | leea_to_cpu(lvid->nextIntegrityExt)); |
cb00ea35 | 1281 | |
6c79e987 | 1282 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1283 | brelse(bh); |
1da177e4 | 1284 | loc.extLength -= sb->s_blocksize; |
cb00ea35 | 1285 | loc.extLocation++; |
1da177e4 | 1286 | } |
6c79e987 | 1287 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1288 | brelse(bh); |
1da177e4 LT |
1289 | } |
1290 | ||
1291 | /* | |
1292 | * udf_process_sequence | |
1293 | * | |
1294 | * PURPOSE | |
1295 | * Process a main/reserve volume descriptor sequence. | |
1296 | * | |
1297 | * PRE-CONDITIONS | |
1298 | * sb Pointer to _locked_ superblock. | |
1299 | * block First block of first extent of the sequence. | |
1300 | * lastblock Lastblock of first extent of the sequence. | |
1301 | * | |
1302 | * HISTORY | |
1303 | * July 1, 1997 - Andrew E. Mileski | |
1304 | * Written, tested, and released. | |
1305 | */ | |
3a71fc5d MS |
1306 | static int udf_process_sequence(struct super_block *sb, long block, |
1307 | long lastblock, kernel_lb_addr *fileset) | |
1da177e4 LT |
1308 | { |
1309 | struct buffer_head *bh = NULL; | |
1310 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
4b11111a | 1311 | struct udf_vds_record *curr; |
1da177e4 LT |
1312 | struct generic_desc *gd; |
1313 | struct volDescPtr *vdp; | |
cb00ea35 CG |
1314 | int done = 0; |
1315 | int i, j; | |
1da177e4 LT |
1316 | uint32_t vdsn; |
1317 | uint16_t ident; | |
1318 | long next_s = 0, next_e = 0; | |
1319 | ||
1320 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1321 | ||
1322 | /* Read the main descriptor sequence */ | |
cb00ea35 | 1323 | for (; (!done && block <= lastblock); block++) { |
1da177e4 LT |
1324 | |
1325 | bh = udf_read_tagged(sb, block, block, &ident); | |
cb00ea35 | 1326 | if (!bh) |
1da177e4 LT |
1327 | break; |
1328 | ||
1329 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1330 | gd = (struct generic_desc *)bh->b_data; | |
1331 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1332 | switch (ident) { |
28de7948 | 1333 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
4b11111a MS |
1334 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
1335 | if (vdsn >= curr->volDescSeqNum) { | |
1336 | curr->volDescSeqNum = vdsn; | |
1337 | curr->block = block; | |
cb00ea35 CG |
1338 | } |
1339 | break; | |
28de7948 | 1340 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
4b11111a MS |
1341 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
1342 | if (vdsn >= curr->volDescSeqNum) { | |
1343 | curr->volDescSeqNum = vdsn; | |
1344 | curr->block = block; | |
cb00ea35 CG |
1345 | |
1346 | vdp = (struct volDescPtr *)bh->b_data; | |
4b11111a MS |
1347 | next_s = le32_to_cpu( |
1348 | vdp->nextVolDescSeqExt.extLocation); | |
1349 | next_e = le32_to_cpu( | |
1350 | vdp->nextVolDescSeqExt.extLength); | |
cb00ea35 CG |
1351 | next_e = next_e >> sb->s_blocksize_bits; |
1352 | next_e += next_s; | |
1353 | } | |
1354 | break; | |
28de7948 | 1355 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
4b11111a MS |
1356 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
1357 | if (vdsn >= curr->volDescSeqNum) { | |
1358 | curr->volDescSeqNum = vdsn; | |
1359 | curr->block = block; | |
cb00ea35 CG |
1360 | } |
1361 | break; | |
28de7948 | 1362 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
4b11111a MS |
1363 | curr = &vds[VDS_POS_PARTITION_DESC]; |
1364 | if (!curr->block) | |
1365 | curr->block = block; | |
cb00ea35 | 1366 | break; |
28de7948 | 1367 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
4b11111a MS |
1368 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
1369 | if (vdsn >= curr->volDescSeqNum) { | |
1370 | curr->volDescSeqNum = vdsn; | |
1371 | curr->block = block; | |
cb00ea35 CG |
1372 | } |
1373 | break; | |
28de7948 | 1374 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
4b11111a MS |
1375 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
1376 | if (vdsn >= curr->volDescSeqNum) { | |
1377 | curr->volDescSeqNum = vdsn; | |
1378 | curr->block = block; | |
cb00ea35 CG |
1379 | } |
1380 | break; | |
28de7948 | 1381 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
cb00ea35 CG |
1382 | vds[VDS_POS_TERMINATING_DESC].block = block; |
1383 | if (next_e) { | |
1384 | block = next_s; | |
1385 | lastblock = next_e; | |
1386 | next_s = next_e = 0; | |
4b11111a | 1387 | } else |
cb00ea35 CG |
1388 | done = 1; |
1389 | break; | |
1da177e4 | 1390 | } |
3bf25cb4 | 1391 | brelse(bh); |
1da177e4 | 1392 | } |
cb00ea35 CG |
1393 | for (i = 0; i < VDS_POS_LENGTH; i++) { |
1394 | if (vds[i].block) { | |
3a71fc5d MS |
1395 | bh = udf_read_tagged(sb, vds[i].block, vds[i].block, |
1396 | &ident); | |
1da177e4 | 1397 | |
28de7948 | 1398 | if (i == VDS_POS_PRIMARY_VOL_DESC) { |
1da177e4 | 1399 | udf_load_pvoldesc(sb, bh); |
28de7948 | 1400 | } else if (i == VDS_POS_LOGICAL_VOL_DESC) { |
deae6cfc MS |
1401 | if (udf_load_logicalvol(sb, bh, fileset)) { |
1402 | brelse(bh); | |
1403 | return 1; | |
1404 | } | |
28de7948 | 1405 | } else if (i == VDS_POS_PARTITION_DESC) { |
1da177e4 | 1406 | struct buffer_head *bh2 = NULL; |
bcec4477 JK |
1407 | if (udf_load_partdesc(sb, bh)) { |
1408 | brelse(bh); | |
1409 | return 1; | |
1410 | } | |
3a71fc5d MS |
1411 | for (j = vds[i].block + 1; |
1412 | j < vds[VDS_POS_TERMINATING_DESC].block; | |
1413 | j++) { | |
1da177e4 LT |
1414 | bh2 = udf_read_tagged(sb, j, j, &ident); |
1415 | gd = (struct generic_desc *)bh2->b_data; | |
1416 | if (ident == TAG_IDENT_PD) | |
3a71fc5d MS |
1417 | if (udf_load_partdesc(sb, |
1418 | bh2)) { | |
bcec4477 JK |
1419 | brelse(bh); |
1420 | brelse(bh2); | |
1421 | return 1; | |
1422 | } | |
3bf25cb4 | 1423 | brelse(bh2); |
1da177e4 LT |
1424 | } |
1425 | } | |
3bf25cb4 | 1426 | brelse(bh); |
1da177e4 LT |
1427 | } |
1428 | } | |
1429 | ||
1430 | return 0; | |
1431 | } | |
1432 | ||
1433 | /* | |
1434 | * udf_check_valid() | |
1435 | */ | |
cb00ea35 | 1436 | static int udf_check_valid(struct super_block *sb, int novrs, int silent) |
1da177e4 LT |
1437 | { |
1438 | long block; | |
1439 | ||
cb00ea35 | 1440 | if (novrs) { |
1da177e4 LT |
1441 | udf_debug("Validity check skipped because of novrs option\n"); |
1442 | return 0; | |
1443 | } | |
1444 | /* Check that it is NSR02 compliant */ | |
1445 | /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
3a71fc5d MS |
1446 | else { |
1447 | block = udf_vrs(sb, silent); | |
1448 | if (block == -1) { | |
6c79e987 | 1449 | struct udf_sb_info *sbi = UDF_SB(sb); |
3a71fc5d MS |
1450 | udf_debug("Failed to read byte 32768. Assuming open " |
1451 | "disc. Skipping validity check\n"); | |
6c79e987 MS |
1452 | if (!sbi->s_last_block) |
1453 | sbi->s_last_block = udf_get_last_block(sb); | |
3a71fc5d MS |
1454 | return 0; |
1455 | } else | |
1456 | return !block; | |
28de7948 | 1457 | } |
1da177e4 LT |
1458 | } |
1459 | ||
28de7948 | 1460 | static int udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset) |
1da177e4 LT |
1461 | { |
1462 | struct anchorVolDescPtr *anchor; | |
1463 | uint16_t ident; | |
1464 | struct buffer_head *bh; | |
1465 | long main_s, main_e, reserve_s, reserve_e; | |
1466 | int i, j; | |
6c79e987 | 1467 | struct udf_sb_info *sbi; |
1da177e4 LT |
1468 | |
1469 | if (!sb) | |
1470 | return 1; | |
6c79e987 | 1471 | sbi = UDF_SB(sb); |
1da177e4 | 1472 | |
6c79e987 | 1473 | for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) { |
28f7c4d4 MS |
1474 | if (!sbi->s_anchor[i]) |
1475 | continue; | |
1476 | bh = udf_read_tagged(sb, sbi->s_anchor[i], sbi->s_anchor[i], | |
1477 | &ident); | |
1478 | if (!bh) | |
1479 | continue; | |
1480 | ||
1481 | anchor = (struct anchorVolDescPtr *)bh->b_data; | |
1482 | ||
1483 | /* Locate the main sequence */ | |
1484 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1485 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1486 | main_e = main_e >> sb->s_blocksize_bits; | |
1487 | main_e += main_s; | |
1488 | ||
1489 | /* Locate the reserve sequence */ | |
1490 | reserve_s = le32_to_cpu( | |
4b11111a | 1491 | anchor->reserveVolDescSeqExt.extLocation); |
28f7c4d4 | 1492 | reserve_e = le32_to_cpu( |
4b11111a | 1493 | anchor->reserveVolDescSeqExt.extLength); |
28f7c4d4 MS |
1494 | reserve_e = reserve_e >> sb->s_blocksize_bits; |
1495 | reserve_e += reserve_s; | |
1da177e4 | 1496 | |
28f7c4d4 | 1497 | brelse(bh); |
1da177e4 | 1498 | |
28f7c4d4 MS |
1499 | /* Process the main & reserve sequences */ |
1500 | /* responsible for finding the PartitionDesc(s) */ | |
1501 | if (!(udf_process_sequence(sb, main_s, main_e, | |
1502 | fileset) && | |
1503 | udf_process_sequence(sb, reserve_s, reserve_e, | |
1504 | fileset))) | |
1505 | break; | |
1da177e4 LT |
1506 | } |
1507 | ||
6c79e987 | 1508 | if (i == ARRAY_SIZE(sbi->s_anchor)) { |
1da177e4 LT |
1509 | udf_debug("No Anchor block found\n"); |
1510 | return 1; | |
28f7c4d4 MS |
1511 | } |
1512 | udf_debug("Using anchor in block %d\n", sbi->s_anchor[i]); | |
1da177e4 | 1513 | |
6c79e987 | 1514 | for (i = 0; i < sbi->s_partitions; i++) { |
28de7948 | 1515 | kernel_lb_addr uninitialized_var(ino); |
6c79e987 MS |
1516 | struct udf_part_map *map = &sbi->s_partmaps[i]; |
1517 | switch (map->s_partition_type) { | |
cb00ea35 CG |
1518 | case UDF_VIRTUAL_MAP15: |
1519 | case UDF_VIRTUAL_MAP20: | |
6c79e987 MS |
1520 | if (!sbi->s_last_block) { |
1521 | sbi->s_last_block = udf_get_last_block(sb); | |
28de7948 CG |
1522 | udf_find_anchor(sb); |
1523 | } | |
1da177e4 | 1524 | |
6c79e987 | 1525 | if (!sbi->s_last_block) { |
28de7948 | 1526 | udf_debug("Unable to determine Lastblock (For " |
b1e7a4b1 | 1527 | "Virtual Partition)\n"); |
28de7948 CG |
1528 | return 1; |
1529 | } | |
1da177e4 | 1530 | |
6c79e987 MS |
1531 | for (j = 0; j < sbi->s_partitions; j++) { |
1532 | struct udf_part_map *map2 = &sbi->s_partmaps[j]; | |
b1e7a4b1 | 1533 | if (j != i && |
4b11111a MS |
1534 | map->s_volumeseqnum == |
1535 | map2->s_volumeseqnum && | |
1536 | map->s_partition_num == | |
1537 | map2->s_partition_num) { | |
28de7948 | 1538 | ino.partitionReferenceNum = j; |
4b11111a MS |
1539 | ino.logicalBlockNum = |
1540 | sbi->s_last_block - | |
1541 | map2->s_partition_root; | |
28de7948 | 1542 | break; |
1da177e4 | 1543 | } |
28de7948 | 1544 | } |
1da177e4 | 1545 | |
6c79e987 | 1546 | if (j == sbi->s_partitions) |
28de7948 | 1547 | return 1; |
1da177e4 | 1548 | |
6c79e987 MS |
1549 | sbi->s_vat_inode = udf_iget(sb, ino); |
1550 | if (!sbi->s_vat_inode) | |
28de7948 | 1551 | return 1; |
1da177e4 | 1552 | |
6c79e987 MS |
1553 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { |
1554 | map->s_type_specific.s_virtual.s_start_offset = | |
1555 | udf_ext0_offset(sbi->s_vat_inode); | |
1556 | map->s_type_specific.s_virtual.s_num_entries = | |
1557 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1558 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
28de7948 | 1559 | uint32_t pos; |
4b11111a | 1560 | struct virtualAllocationTable20 *vat20; |
1da177e4 | 1561 | |
6c79e987 | 1562 | pos = udf_block_map(sbi->s_vat_inode, 0); |
28de7948 CG |
1563 | bh = sb_bread(sb, pos); |
1564 | if (!bh) | |
1565 | return 1; | |
4b11111a MS |
1566 | vat20 = (struct virtualAllocationTable20 *) |
1567 | bh->b_data + | |
1568 | udf_ext0_offset(sbi->s_vat_inode); | |
6c79e987 | 1569 | map->s_type_specific.s_virtual.s_start_offset = |
4b11111a | 1570 | le16_to_cpu(vat20->lengthHeader) + |
6c79e987 | 1571 | udf_ext0_offset(sbi->s_vat_inode); |
4b11111a MS |
1572 | map->s_type_specific.s_virtual.s_num_entries = |
1573 | (sbi->s_vat_inode->i_size - | |
1574 | map->s_type_specific.s_virtual. | |
1575 | s_start_offset) >> 2; | |
28de7948 | 1576 | brelse(bh); |
1da177e4 | 1577 | } |
6c79e987 MS |
1578 | map->s_partition_root = udf_get_pblock(sb, 0, i, 0); |
1579 | map->s_partition_len = | |
1580 | sbi->s_partmaps[ino.partitionReferenceNum]. | |
1581 | s_partition_len; | |
1da177e4 LT |
1582 | } |
1583 | } | |
1584 | return 0; | |
1585 | } | |
1586 | ||
1587 | static void udf_open_lvid(struct super_block *sb) | |
1588 | { | |
6c79e987 MS |
1589 | struct udf_sb_info *sbi = UDF_SB(sb); |
1590 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1591 | if (bh) { | |
1da177e4 | 1592 | kernel_timestamp cpu_time; |
4b11111a MS |
1593 | struct logicalVolIntegrityDesc *lvid = |
1594 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1595 | struct logicalVolIntegrityDescImpUse *lvidiu = | |
1596 | udf_sb_lvidiu(sbi); | |
1da177e4 | 1597 | |
6c79e987 MS |
1598 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
1599 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1da177e4 | 1600 | if (udf_time_to_stamp(&cpu_time, CURRENT_TIME)) |
6c79e987 MS |
1601 | lvid->recordingDateAndTime = cpu_to_lets(cpu_time); |
1602 | lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN; | |
1da177e4 | 1603 | |
4b11111a MS |
1604 | lvid->descTag.descCRC = cpu_to_le16( |
1605 | udf_crc((char *)lvid + sizeof(tag), | |
1606 | le16_to_cpu(lvid->descTag.descCRCLength), | |
1607 | 0)); | |
1da177e4 | 1608 | |
3f2587bb | 1609 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); |
6c79e987 | 1610 | mark_buffer_dirty(bh); |
1da177e4 LT |
1611 | } |
1612 | } | |
1613 | ||
1614 | static void udf_close_lvid(struct super_block *sb) | |
1615 | { | |
28de7948 | 1616 | kernel_timestamp cpu_time; |
6c79e987 MS |
1617 | struct udf_sb_info *sbi = UDF_SB(sb); |
1618 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1619 | struct logicalVolIntegrityDesc *lvid; | |
28de7948 | 1620 | |
6c79e987 MS |
1621 | if (!bh) |
1622 | return; | |
1623 | ||
1624 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1625 | ||
1626 | if (lvid->integrityType == LVID_INTEGRITY_TYPE_OPEN) { | |
4b11111a MS |
1627 | struct logicalVolIntegrityDescImpUse *lvidiu = |
1628 | udf_sb_lvidiu(sbi); | |
6c79e987 MS |
1629 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
1630 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1da177e4 | 1631 | if (udf_time_to_stamp(&cpu_time, CURRENT_TIME)) |
6c79e987 MS |
1632 | lvid->recordingDateAndTime = cpu_to_lets(cpu_time); |
1633 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) | |
4b11111a MS |
1634 | lvidiu->maxUDFWriteRev = |
1635 | cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
6c79e987 MS |
1636 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) |
1637 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
1638 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
1639 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
1640 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
1641 | ||
4b11111a MS |
1642 | lvid->descTag.descCRC = cpu_to_le16( |
1643 | udf_crc((char *)lvid + sizeof(tag), | |
1644 | le16_to_cpu(lvid->descTag.descCRCLength), | |
1645 | 0)); | |
6c79e987 | 1646 | |
3f2587bb | 1647 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); |
6c79e987 | 1648 | mark_buffer_dirty(bh); |
1da177e4 LT |
1649 | } |
1650 | } | |
1651 | ||
66e1da3f MS |
1652 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
1653 | { | |
1654 | int i; | |
1655 | int nr_groups = bitmap->s_nr_groups; | |
4b11111a MS |
1656 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * |
1657 | nr_groups); | |
66e1da3f MS |
1658 | |
1659 | for (i = 0; i < nr_groups; i++) | |
1660 | if (bitmap->s_block_bitmap[i]) | |
1661 | brelse(bitmap->s_block_bitmap[i]); | |
1662 | ||
1663 | if (size <= PAGE_SIZE) | |
1664 | kfree(bitmap); | |
1665 | else | |
1666 | vfree(bitmap); | |
1667 | } | |
1668 | ||
1da177e4 LT |
1669 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
1670 | { | |
1671 | int i; | |
cb00ea35 | 1672 | struct inode *inode = NULL; |
1da177e4 LT |
1673 | struct udf_options uopt; |
1674 | kernel_lb_addr rootdir, fileset; | |
1675 | struct udf_sb_info *sbi; | |
1676 | ||
1677 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
1678 | uopt.uid = -1; | |
1679 | uopt.gid = -1; | |
1680 | uopt.umask = 0; | |
1681 | ||
6c79e987 | 1682 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
1da177e4 LT |
1683 | if (!sbi) |
1684 | return -ENOMEM; | |
28de7948 | 1685 | |
1da177e4 | 1686 | sb->s_fs_info = sbi; |
1da177e4 | 1687 | |
1e7933de | 1688 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 1689 | |
6da80894 | 1690 | if (!udf_parse_options((char *)options, &uopt, false)) |
1da177e4 LT |
1691 | goto error_out; |
1692 | ||
1693 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 1694 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
1da177e4 | 1695 | udf_error(sb, "udf_read_super", |
cb00ea35 | 1696 | "utf8 cannot be combined with iocharset\n"); |
1da177e4 LT |
1697 | goto error_out; |
1698 | } | |
1699 | #ifdef CONFIG_UDF_NLS | |
cb00ea35 | 1700 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
1701 | uopt.nls_map = load_nls_default(); |
1702 | if (!uopt.nls_map) | |
1703 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
1704 | else | |
1705 | udf_debug("Using default NLS map\n"); | |
1706 | } | |
1707 | #endif | |
1708 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
1709 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
1710 | ||
1711 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
1712 | fileset.partitionReferenceNum = 0xFFFF; | |
1713 | ||
6c79e987 MS |
1714 | sbi->s_flags = uopt.flags; |
1715 | sbi->s_uid = uopt.uid; | |
1716 | sbi->s_gid = uopt.gid; | |
1717 | sbi->s_umask = uopt.umask; | |
1718 | sbi->s_nls_map = uopt.nls_map; | |
1da177e4 LT |
1719 | |
1720 | /* Set the block size for all transfers */ | |
f1f73ba8 CH |
1721 | if (!sb_min_blocksize(sb, uopt.blocksize)) { |
1722 | udf_debug("Bad block size (%d)\n", uopt.blocksize); | |
1723 | printk(KERN_ERR "udf: bad block size (%d)\n", uopt.blocksize); | |
1da177e4 | 1724 | goto error_out; |
f1f73ba8 | 1725 | } |
1da177e4 | 1726 | |
cb00ea35 | 1727 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 1728 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 1729 | else |
6c79e987 | 1730 | sbi->s_session = uopt.session; |
1da177e4 | 1731 | |
6c79e987 | 1732 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 1733 | |
6c79e987 MS |
1734 | sbi->s_last_block = uopt.lastblock; |
1735 | sbi->s_anchor[0] = sbi->s_anchor[1] = 0; | |
1736 | sbi->s_anchor[2] = uopt.anchor; | |
1737 | sbi->s_anchor[3] = 256; | |
1da177e4 | 1738 | |
3a71fc5d MS |
1739 | if (udf_check_valid(sb, uopt.novrs, silent)) { |
1740 | /* read volume recognition sequences */ | |
1741 | printk(KERN_WARNING "UDF-fs: No VRS found\n"); | |
cb00ea35 | 1742 | goto error_out; |
1da177e4 LT |
1743 | } |
1744 | ||
1745 | udf_find_anchor(sb); | |
1746 | ||
1747 | /* Fill in the rest of the superblock */ | |
1748 | sb->s_op = &udf_sb_ops; | |
1749 | sb->dq_op = NULL; | |
1750 | sb->s_dirt = 0; | |
1751 | sb->s_magic = UDF_SUPER_MAGIC; | |
1752 | sb->s_time_gran = 1000; | |
1753 | ||
cb00ea35 | 1754 | if (udf_load_partition(sb, &fileset)) { |
3a71fc5d | 1755 | printk(KERN_WARNING "UDF-fs: No partition found (1)\n"); |
1da177e4 LT |
1756 | goto error_out; |
1757 | } | |
1758 | ||
6c79e987 | 1759 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
1da177e4 | 1760 | |
6c79e987 | 1761 | if (sbi->s_lvid_bh) { |
4b11111a MS |
1762 | struct logicalVolIntegrityDescImpUse *lvidiu = |
1763 | udf_sb_lvidiu(sbi); | |
6c79e987 MS |
1764 | uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); |
1765 | uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
4b11111a MS |
1766 | /* uint16_t maxUDFWriteRev = |
1767 | le16_to_cpu(lvidiu->maxUDFWriteRev); */ | |
1da177e4 | 1768 | |
cb00ea35 | 1769 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
4b11111a MS |
1770 | printk(KERN_ERR "UDF-fs: minUDFReadRev=%x " |
1771 | "(max is %x)\n", | |
6c79e987 | 1772 | le16_to_cpu(lvidiu->minUDFReadRev), |
cb00ea35 | 1773 | UDF_MAX_READ_VERSION); |
1da177e4 | 1774 | goto error_out; |
4b11111a | 1775 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) |
1da177e4 | 1776 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 1777 | |
6c79e987 | 1778 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
1779 | |
1780 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
1781 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
1782 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
1783 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
1784 | } | |
1785 | ||
6c79e987 | 1786 | if (!sbi->s_partitions) { |
3a71fc5d | 1787 | printk(KERN_WARNING "UDF-fs: No partition found (2)\n"); |
1da177e4 LT |
1788 | goto error_out; |
1789 | } | |
1790 | ||
4b11111a MS |
1791 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
1792 | UDF_PART_FLAG_READ_ONLY) { | |
1793 | printk(KERN_NOTICE "UDF-fs: Partition marked readonly; " | |
1794 | "forcing readonly mount\n"); | |
39b3f6d6 | 1795 | sb->s_flags |= MS_RDONLY; |
c1a26e7d | 1796 | } |
39b3f6d6 | 1797 | |
cb00ea35 | 1798 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
3a71fc5d | 1799 | printk(KERN_WARNING "UDF-fs: No fileset found\n"); |
1da177e4 LT |
1800 | goto error_out; |
1801 | } | |
1802 | ||
cb00ea35 | 1803 | if (!silent) { |
1da177e4 | 1804 | kernel_timestamp ts; |
6c79e987 | 1805 | udf_time_to_stamp(&ts, sbi->s_record_time); |
a9ca6635 | 1806 | udf_info("UDF: Mounting volume '%s', " |
28de7948 | 1807 | "timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
6c79e987 MS |
1808 | sbi->s_volume_ident, ts.year, ts.month, ts.day, |
1809 | ts.hour, ts.minute, ts.typeAndTimezone); | |
1da177e4 LT |
1810 | } |
1811 | if (!(sb->s_flags & MS_RDONLY)) | |
1812 | udf_open_lvid(sb); | |
1813 | ||
1814 | /* Assign the root inode */ | |
1815 | /* assign inodes by physical block number */ | |
1816 | /* perhaps it's not extensible enough, but for now ... */ | |
cb00ea35 CG |
1817 | inode = udf_iget(sb, rootdir); |
1818 | if (!inode) { | |
4b11111a MS |
1819 | printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, " |
1820 | "partition=%d\n", | |
cb00ea35 | 1821 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
1da177e4 LT |
1822 | goto error_out; |
1823 | } | |
1824 | ||
1825 | /* Allocate a dentry for the root inode */ | |
1826 | sb->s_root = d_alloc_root(inode); | |
cb00ea35 | 1827 | if (!sb->s_root) { |
3a71fc5d | 1828 | printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n"); |
1da177e4 LT |
1829 | iput(inode); |
1830 | goto error_out; | |
1831 | } | |
31170b6a | 1832 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
1da177e4 LT |
1833 | return 0; |
1834 | ||
28de7948 | 1835 | error_out: |
6c79e987 MS |
1836 | if (sbi->s_vat_inode) |
1837 | iput(sbi->s_vat_inode); | |
1838 | if (sbi->s_partitions) { | |
1839 | struct udf_part_map *map = &sbi->s_partmaps[sbi->s_partition]; | |
1840 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
1841 | iput(map->s_uspace.s_table); | |
1842 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
1843 | iput(map->s_fspace.s_table); | |
1844 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
66e1da3f | 1845 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); |
6c79e987 | 1846 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) |
66e1da3f | 1847 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); |
6c79e987 | 1848 | if (map->s_partition_type == UDF_SPARABLE_MAP15) |
cb00ea35 | 1849 | for (i = 0; i < 4; i++) |
4b11111a MS |
1850 | brelse(map->s_type_specific.s_sparing. |
1851 | s_spar_map[i]); | |
1da177e4 LT |
1852 | } |
1853 | #ifdef CONFIG_UDF_NLS | |
1854 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 1855 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
1856 | #endif |
1857 | if (!(sb->s_flags & MS_RDONLY)) | |
1858 | udf_close_lvid(sb); | |
6c79e987 MS |
1859 | brelse(sbi->s_lvid_bh); |
1860 | ||
1861 | kfree(sbi->s_partmaps); | |
1da177e4 LT |
1862 | kfree(sbi); |
1863 | sb->s_fs_info = NULL; | |
28de7948 | 1864 | |
1da177e4 LT |
1865 | return -EINVAL; |
1866 | } | |
1867 | ||
b8145a76 AB |
1868 | static void udf_error(struct super_block *sb, const char *function, |
1869 | const char *fmt, ...) | |
1da177e4 LT |
1870 | { |
1871 | va_list args; | |
1872 | ||
cb00ea35 | 1873 | if (!(sb->s_flags & MS_RDONLY)) { |
1da177e4 LT |
1874 | /* mark sb error */ |
1875 | sb->s_dirt = 1; | |
1876 | } | |
1877 | va_start(args, fmt); | |
4a6e617a | 1878 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 | 1879 | va_end(args); |
3a71fc5d | 1880 | printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n", |
28de7948 | 1881 | sb->s_id, function, error_buf); |
1da177e4 LT |
1882 | } |
1883 | ||
1884 | void udf_warning(struct super_block *sb, const char *function, | |
cb00ea35 | 1885 | const char *fmt, ...) |
1da177e4 LT |
1886 | { |
1887 | va_list args; | |
1888 | ||
cb00ea35 | 1889 | va_start(args, fmt); |
4a6e617a | 1890 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 LT |
1891 | va_end(args); |
1892 | printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n", | |
cb00ea35 | 1893 | sb->s_id, function, error_buf); |
1da177e4 LT |
1894 | } |
1895 | ||
cb00ea35 | 1896 | static void udf_put_super(struct super_block *sb) |
1da177e4 LT |
1897 | { |
1898 | int i; | |
6c79e987 | 1899 | struct udf_sb_info *sbi; |
1da177e4 | 1900 | |
6c79e987 MS |
1901 | sbi = UDF_SB(sb); |
1902 | if (sbi->s_vat_inode) | |
1903 | iput(sbi->s_vat_inode); | |
1904 | if (sbi->s_partitions) { | |
1905 | struct udf_part_map *map = &sbi->s_partmaps[sbi->s_partition]; | |
1906 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
1907 | iput(map->s_uspace.s_table); | |
1908 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
1909 | iput(map->s_fspace.s_table); | |
1910 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
66e1da3f | 1911 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); |
6c79e987 | 1912 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) |
66e1da3f | 1913 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); |
6c79e987 | 1914 | if (map->s_partition_type == UDF_SPARABLE_MAP15) |
cb00ea35 | 1915 | for (i = 0; i < 4; i++) |
4b11111a MS |
1916 | brelse(map->s_type_specific.s_sparing. |
1917 | s_spar_map[i]); | |
1da177e4 LT |
1918 | } |
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 | } |