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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * super.c | |
3 | * | |
4 | * PURPOSE | |
5 | * Super block routines for the OSTA-UDF(tm) filesystem. | |
6 | * | |
7 | * DESCRIPTION | |
8 | * OSTA-UDF(tm) = Optical Storage Technology Association | |
9 | * Universal Disk Format. | |
10 | * | |
11 | * This code is based on version 2.00 of the UDF specification, | |
12 | * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346]. | |
13 | * http://www.osta.org/ | |
14 | * http://www.ecma.ch/ | |
15 | * http://www.iso.org/ | |
16 | * | |
1da177e4 LT |
17 | * COPYRIGHT |
18 | * This file is distributed under the terms of the GNU General Public | |
19 | * License (GPL). Copies of the GPL can be obtained from: | |
20 | * ftp://prep.ai.mit.edu/pub/gnu/GPL | |
21 | * Each contributing author retains all rights to their own work. | |
22 | * | |
23 | * (C) 1998 Dave Boynton | |
24 | * (C) 1998-2004 Ben Fennema | |
25 | * (C) 2000 Stelias Computing Inc | |
26 | * | |
27 | * HISTORY | |
28 | * | |
29 | * 09/24/98 dgb changed to allow compiling outside of kernel, and | |
30 | * added some debugging. | |
31 | * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34 | |
32 | * 10/16/98 attempting some multi-session support | |
33 | * 10/17/98 added freespace count for "df" | |
34 | * 11/11/98 gr added novrs option | |
35 | * 11/26/98 dgb added fileset,anchor mount options | |
3a71fc5d MS |
36 | * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced |
37 | * vol descs. rewrote option handling based on isofs | |
1da177e4 LT |
38 | * 12/20/98 find the free space bitmap (if it exists) |
39 | */ | |
40 | ||
cb00ea35 | 41 | #include "udfdecl.h" |
1da177e4 | 42 | |
1da177e4 LT |
43 | #include <linux/blkdev.h> |
44 | #include <linux/slab.h> | |
45 | #include <linux/kernel.h> | |
46 | #include <linux/module.h> | |
47 | #include <linux/parser.h> | |
48 | #include <linux/stat.h> | |
49 | #include <linux/cdrom.h> | |
50 | #include <linux/nls.h> | |
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> | |
1da177e4 LT |
58 | #include <asm/byteorder.h> |
59 | ||
1da177e4 LT |
60 | #include "udf_sb.h" |
61 | #include "udf_i.h" | |
62 | ||
63 | #include <linux/init.h> | |
64 | #include <asm/uaccess.h> | |
65 | ||
66 | #define VDS_POS_PRIMARY_VOL_DESC 0 | |
67 | #define VDS_POS_UNALLOC_SPACE_DESC 1 | |
68 | #define VDS_POS_LOGICAL_VOL_DESC 2 | |
69 | #define VDS_POS_PARTITION_DESC 3 | |
70 | #define VDS_POS_IMP_USE_VOL_DESC 4 | |
71 | #define VDS_POS_VOL_DESC_PTR 5 | |
72 | #define VDS_POS_TERMINATING_DESC 6 | |
73 | #define VDS_POS_LENGTH 7 | |
74 | ||
6da80894 MS |
75 | #define UDF_DEFAULT_BLOCKSIZE 2048 |
76 | ||
1da177e4 LT |
77 | static char error_buf[1024]; |
78 | ||
79 | /* These are the "meat" - everything else is stuffing */ | |
80 | static int udf_fill_super(struct super_block *, void *, int); | |
81 | static void udf_put_super(struct super_block *); | |
82 | static void udf_write_super(struct super_block *); | |
83 | static int udf_remount_fs(struct super_block *, int *, char *); | |
84 | static int udf_check_valid(struct super_block *, int, int); | |
85 | static int udf_vrs(struct super_block *sb, int silent); | |
86 | static int udf_load_partition(struct super_block *, kernel_lb_addr *); | |
cb00ea35 CG |
87 | static int udf_load_logicalvol(struct super_block *, struct buffer_head *, |
88 | kernel_lb_addr *); | |
1da177e4 LT |
89 | static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad); |
90 | static void udf_find_anchor(struct super_block *); | |
cb00ea35 CG |
91 | static int udf_find_fileset(struct super_block *, kernel_lb_addr *, |
92 | kernel_lb_addr *); | |
1da177e4 | 93 | static void udf_load_pvoldesc(struct super_block *, struct buffer_head *); |
cb00ea35 CG |
94 | static void udf_load_fileset(struct super_block *, struct buffer_head *, |
95 | kernel_lb_addr *); | |
bcec4477 | 96 | static int udf_load_partdesc(struct super_block *, struct buffer_head *); |
1da177e4 LT |
97 | static void udf_open_lvid(struct super_block *); |
98 | static void udf_close_lvid(struct super_block *); | |
99 | static unsigned int udf_count_free(struct super_block *); | |
726c3342 | 100 | static int udf_statfs(struct dentry *, struct kstatfs *); |
6da80894 | 101 | static int udf_show_options(struct seq_file *, struct vfsmount *); |
1da177e4 | 102 | |
6c79e987 MS |
103 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) |
104 | { | |
4b11111a MS |
105 | struct logicalVolIntegrityDesc *lvid = |
106 | (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; | |
6c79e987 | 107 | __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); |
4b11111a MS |
108 | __u32 offset = number_of_partitions * 2 * |
109 | sizeof(uint32_t)/sizeof(uint8_t); | |
6c79e987 MS |
110 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
111 | } | |
112 | ||
1da177e4 | 113 | /* UDF filesystem type */ |
454e2398 | 114 | static int udf_get_sb(struct file_system_type *fs_type, |
cb00ea35 CG |
115 | int flags, const char *dev_name, void *data, |
116 | struct vfsmount *mnt) | |
1da177e4 | 117 | { |
454e2398 | 118 | return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt); |
1da177e4 LT |
119 | } |
120 | ||
121 | static struct file_system_type udf_fstype = { | |
28de7948 CG |
122 | .owner = THIS_MODULE, |
123 | .name = "udf", | |
124 | .get_sb = udf_get_sb, | |
125 | .kill_sb = kill_block_super, | |
126 | .fs_flags = FS_REQUIRES_DEV, | |
1da177e4 LT |
127 | }; |
128 | ||
cb00ea35 | 129 | static struct kmem_cache *udf_inode_cachep; |
1da177e4 LT |
130 | |
131 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
132 | { | |
133 | struct udf_inode_info *ei; | |
3a71fc5d | 134 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
135 | if (!ei) |
136 | return NULL; | |
95f8797f DB |
137 | |
138 | ei->i_unique = 0; | |
139 | ei->i_lenExtents = 0; | |
140 | ei->i_next_alloc_block = 0; | |
141 | ei->i_next_alloc_goal = 0; | |
142 | ei->i_strat4096 = 0; | |
143 | ||
1da177e4 LT |
144 | return &ei->vfs_inode; |
145 | } | |
146 | ||
147 | static void udf_destroy_inode(struct inode *inode) | |
148 | { | |
149 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); | |
150 | } | |
151 | ||
4ba9b9d0 | 152 | static void init_once(struct kmem_cache *cachep, void *foo) |
1da177e4 | 153 | { |
cb00ea35 | 154 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 155 | |
a35afb83 CL |
156 | ei->i_ext.i_data = NULL; |
157 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
158 | } |
159 | ||
160 | static int init_inodecache(void) | |
161 | { | |
162 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
163 | sizeof(struct udf_inode_info), | |
cb00ea35 CG |
164 | 0, (SLAB_RECLAIM_ACCOUNT | |
165 | SLAB_MEM_SPREAD), | |
20c2df83 | 166 | init_once); |
28de7948 | 167 | if (!udf_inode_cachep) |
1da177e4 LT |
168 | return -ENOMEM; |
169 | return 0; | |
170 | } | |
171 | ||
172 | static void destroy_inodecache(void) | |
173 | { | |
1a1d92c1 | 174 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
175 | } |
176 | ||
177 | /* Superblock operations */ | |
ee9b6d61 | 178 | static const struct super_operations udf_sb_ops = { |
28de7948 CG |
179 | .alloc_inode = udf_alloc_inode, |
180 | .destroy_inode = udf_destroy_inode, | |
181 | .write_inode = udf_write_inode, | |
182 | .delete_inode = udf_delete_inode, | |
183 | .clear_inode = udf_clear_inode, | |
184 | .put_super = udf_put_super, | |
185 | .write_super = udf_write_super, | |
186 | .statfs = udf_statfs, | |
187 | .remount_fs = udf_remount_fs, | |
6da80894 | 188 | .show_options = udf_show_options, |
1da177e4 LT |
189 | }; |
190 | ||
cb00ea35 | 191 | struct udf_options { |
1da177e4 LT |
192 | unsigned char novrs; |
193 | unsigned int blocksize; | |
194 | unsigned int session; | |
195 | unsigned int lastblock; | |
196 | unsigned int anchor; | |
197 | unsigned int volume; | |
198 | unsigned short partition; | |
199 | unsigned int fileset; | |
200 | unsigned int rootdir; | |
201 | unsigned int flags; | |
202 | mode_t umask; | |
203 | gid_t gid; | |
204 | uid_t uid; | |
205 | struct nls_table *nls_map; | |
206 | }; | |
207 | ||
208 | static int __init init_udf_fs(void) | |
209 | { | |
210 | int err; | |
28de7948 | 211 | |
1da177e4 LT |
212 | err = init_inodecache(); |
213 | if (err) | |
214 | goto out1; | |
215 | err = register_filesystem(&udf_fstype); | |
216 | if (err) | |
217 | goto out; | |
28de7948 | 218 | |
1da177e4 | 219 | return 0; |
28de7948 CG |
220 | |
221 | out: | |
1da177e4 | 222 | destroy_inodecache(); |
28de7948 CG |
223 | |
224 | out1: | |
1da177e4 LT |
225 | return err; |
226 | } | |
227 | ||
228 | static void __exit exit_udf_fs(void) | |
229 | { | |
230 | unregister_filesystem(&udf_fstype); | |
231 | destroy_inodecache(); | |
232 | } | |
233 | ||
234 | module_init(init_udf_fs) | |
28de7948 | 235 | module_exit(exit_udf_fs) |
1da177e4 | 236 | |
dc5d39be MS |
237 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
238 | { | |
239 | struct udf_sb_info *sbi = UDF_SB(sb); | |
240 | ||
241 | sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), | |
242 | GFP_KERNEL); | |
243 | if (!sbi->s_partmaps) { | |
244 | udf_error(sb, __FUNCTION__, | |
245 | "Unable to allocate space for %d partition maps", | |
246 | count); | |
247 | sbi->s_partitions = 0; | |
248 | return -ENOMEM; | |
249 | } | |
250 | ||
251 | sbi->s_partitions = count; | |
252 | return 0; | |
253 | } | |
254 | ||
6da80894 MS |
255 | static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt) |
256 | { | |
257 | struct super_block *sb = mnt->mnt_sb; | |
258 | struct udf_sb_info *sbi = UDF_SB(sb); | |
259 | ||
260 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
261 | seq_puts(seq, ",nostrict"); | |
262 | if (sb->s_blocksize != UDF_DEFAULT_BLOCKSIZE) | |
263 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); | |
264 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
265 | seq_puts(seq, ",unhide"); | |
266 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
267 | seq_puts(seq, ",undelete"); | |
268 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
269 | seq_puts(seq, ",noadinicb"); | |
270 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
271 | seq_puts(seq, ",shortad"); | |
272 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
273 | seq_puts(seq, ",uid=forget"); | |
274 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) | |
275 | seq_puts(seq, ",uid=ignore"); | |
276 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) | |
277 | seq_puts(seq, ",gid=forget"); | |
278 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) | |
279 | seq_puts(seq, ",gid=ignore"); | |
280 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) | |
281 | seq_printf(seq, ",uid=%u", sbi->s_uid); | |
282 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) | |
283 | seq_printf(seq, ",gid=%u", sbi->s_gid); | |
284 | if (sbi->s_umask != 0) | |
285 | seq_printf(seq, ",umask=%o", sbi->s_umask); | |
286 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) | |
287 | seq_printf(seq, ",session=%u", sbi->s_session); | |
288 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) | |
289 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
290 | /* | |
291 | * s_anchor[2] could be zeroed out in case there is no anchor | |
292 | * in the specified block, but then the "anchor=N" option | |
293 | * originally given by the user wasn't effective, so it's OK | |
294 | * if we don't show it. | |
295 | */ | |
296 | if (sbi->s_anchor[2] != 0) | |
297 | seq_printf(seq, ",anchor=%u", sbi->s_anchor[2]); | |
298 | /* | |
299 | * volume, partition, fileset and rootdir seem to be ignored | |
300 | * currently | |
301 | */ | |
302 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) | |
303 | seq_puts(seq, ",utf8"); | |
304 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
305 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
306 | ||
307 | return 0; | |
308 | } | |
309 | ||
1da177e4 LT |
310 | /* |
311 | * udf_parse_options | |
312 | * | |
313 | * PURPOSE | |
314 | * Parse mount options. | |
315 | * | |
316 | * DESCRIPTION | |
317 | * The following mount options are supported: | |
318 | * | |
319 | * gid= Set the default group. | |
320 | * umask= Set the default umask. | |
321 | * uid= Set the default user. | |
322 | * bs= Set the block size. | |
323 | * unhide Show otherwise hidden files. | |
324 | * undelete Show deleted files in lists. | |
325 | * adinicb Embed data in the inode (default) | |
326 | * noadinicb Don't embed data in the inode | |
327 | * shortad Use short ad's | |
328 | * longad Use long ad's (default) | |
329 | * nostrict Unset strict conformance | |
330 | * iocharset= Set the NLS character set | |
331 | * | |
332 | * The remaining are for debugging and disaster recovery: | |
333 | * | |
28de7948 | 334 | * novrs Skip volume sequence recognition |
1da177e4 LT |
335 | * |
336 | * The following expect a offset from 0. | |
337 | * | |
338 | * session= Set the CDROM session (default= last session) | |
339 | * anchor= Override standard anchor location. (default= 256) | |
340 | * volume= Override the VolumeDesc location. (unused) | |
341 | * partition= Override the PartitionDesc location. (unused) | |
342 | * lastblock= Set the last block of the filesystem/ | |
343 | * | |
344 | * The following expect a offset from the partition root. | |
345 | * | |
346 | * fileset= Override the fileset block location. (unused) | |
347 | * rootdir= Override the root directory location. (unused) | |
348 | * WARNING: overriding the rootdir to a non-directory may | |
349 | * yield highly unpredictable results. | |
350 | * | |
351 | * PRE-CONDITIONS | |
352 | * options Pointer to mount options string. | |
353 | * uopts Pointer to mount options variable. | |
354 | * | |
355 | * POST-CONDITIONS | |
356 | * <return> 1 Mount options parsed okay. | |
357 | * <return> 0 Error parsing mount options. | |
358 | * | |
359 | * HISTORY | |
360 | * July 1, 1997 - Andrew E. Mileski | |
361 | * Written, tested, and released. | |
362 | */ | |
28de7948 | 363 | |
1da177e4 LT |
364 | enum { |
365 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
366 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
367 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
368 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
369 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
4d6660eb | 370 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore |
1da177e4 LT |
371 | }; |
372 | ||
373 | static match_table_t tokens = { | |
28de7948 CG |
374 | {Opt_novrs, "novrs"}, |
375 | {Opt_nostrict, "nostrict"}, | |
376 | {Opt_bs, "bs=%u"}, | |
377 | {Opt_unhide, "unhide"}, | |
378 | {Opt_undelete, "undelete"}, | |
379 | {Opt_noadinicb, "noadinicb"}, | |
380 | {Opt_adinicb, "adinicb"}, | |
381 | {Opt_shortad, "shortad"}, | |
382 | {Opt_longad, "longad"}, | |
383 | {Opt_uforget, "uid=forget"}, | |
384 | {Opt_uignore, "uid=ignore"}, | |
385 | {Opt_gforget, "gid=forget"}, | |
386 | {Opt_gignore, "gid=ignore"}, | |
387 | {Opt_gid, "gid=%u"}, | |
388 | {Opt_uid, "uid=%u"}, | |
389 | {Opt_umask, "umask=%o"}, | |
390 | {Opt_session, "session=%u"}, | |
391 | {Opt_lastblock, "lastblock=%u"}, | |
392 | {Opt_anchor, "anchor=%u"}, | |
393 | {Opt_volume, "volume=%u"}, | |
394 | {Opt_partition, "partition=%u"}, | |
395 | {Opt_fileset, "fileset=%u"}, | |
396 | {Opt_rootdir, "rootdir=%u"}, | |
397 | {Opt_utf8, "utf8"}, | |
398 | {Opt_iocharset, "iocharset=%s"}, | |
399 | {Opt_err, NULL} | |
1da177e4 LT |
400 | }; |
401 | ||
6da80894 MS |
402 | static int udf_parse_options(char *options, struct udf_options *uopt, |
403 | bool remount) | |
1da177e4 LT |
404 | { |
405 | char *p; | |
406 | int option; | |
407 | ||
408 | uopt->novrs = 0; | |
6da80894 | 409 | uopt->blocksize = UDF_DEFAULT_BLOCKSIZE; |
1da177e4 LT |
410 | uopt->partition = 0xFFFF; |
411 | uopt->session = 0xFFFFFFFF; | |
412 | uopt->lastblock = 0; | |
413 | uopt->anchor = 0; | |
414 | uopt->volume = 0xFFFFFFFF; | |
415 | uopt->rootdir = 0xFFFFFFFF; | |
416 | uopt->fileset = 0xFFFFFFFF; | |
417 | uopt->nls_map = NULL; | |
418 | ||
419 | if (!options) | |
420 | return 1; | |
421 | ||
cb00ea35 | 422 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
423 | substring_t args[MAX_OPT_ARGS]; |
424 | int token; | |
425 | if (!*p) | |
426 | continue; | |
427 | ||
428 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
429 | switch (token) { |
430 | case Opt_novrs: | |
431 | uopt->novrs = 1; | |
432 | case Opt_bs: | |
433 | if (match_int(&args[0], &option)) | |
434 | return 0; | |
435 | uopt->blocksize = option; | |
436 | break; | |
437 | case Opt_unhide: | |
438 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
439 | break; | |
440 | case Opt_undelete: | |
441 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
442 | break; | |
443 | case Opt_noadinicb: | |
444 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
445 | break; | |
446 | case Opt_adinicb: | |
447 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
448 | break; | |
449 | case Opt_shortad: | |
450 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
451 | break; | |
452 | case Opt_longad: | |
453 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
454 | break; | |
455 | case Opt_gid: | |
456 | if (match_int(args, &option)) | |
457 | return 0; | |
458 | uopt->gid = option; | |
ca76d2d8 | 459 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
460 | break; |
461 | case Opt_uid: | |
462 | if (match_int(args, &option)) | |
463 | return 0; | |
464 | uopt->uid = option; | |
ca76d2d8 | 465 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
466 | break; |
467 | case Opt_umask: | |
468 | if (match_octal(args, &option)) | |
469 | return 0; | |
470 | uopt->umask = option; | |
471 | break; | |
472 | case Opt_nostrict: | |
473 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
474 | break; | |
475 | case Opt_session: | |
476 | if (match_int(args, &option)) | |
477 | return 0; | |
478 | uopt->session = option; | |
6da80894 MS |
479 | if (!remount) |
480 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
481 | break; |
482 | case Opt_lastblock: | |
483 | if (match_int(args, &option)) | |
484 | return 0; | |
485 | uopt->lastblock = option; | |
6da80894 MS |
486 | if (!remount) |
487 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
488 | break; |
489 | case Opt_anchor: | |
490 | if (match_int(args, &option)) | |
491 | return 0; | |
492 | uopt->anchor = option; | |
493 | break; | |
494 | case Opt_volume: | |
495 | if (match_int(args, &option)) | |
496 | return 0; | |
497 | uopt->volume = option; | |
498 | break; | |
499 | case Opt_partition: | |
500 | if (match_int(args, &option)) | |
501 | return 0; | |
502 | uopt->partition = option; | |
503 | break; | |
504 | case Opt_fileset: | |
505 | if (match_int(args, &option)) | |
506 | return 0; | |
507 | uopt->fileset = option; | |
508 | break; | |
509 | case Opt_rootdir: | |
510 | if (match_int(args, &option)) | |
511 | return 0; | |
512 | uopt->rootdir = option; | |
513 | break; | |
514 | case Opt_utf8: | |
515 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
516 | break; | |
1da177e4 | 517 | #ifdef CONFIG_UDF_NLS |
cb00ea35 CG |
518 | case Opt_iocharset: |
519 | uopt->nls_map = load_nls(args[0].from); | |
520 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
521 | break; | |
1da177e4 | 522 | #endif |
cb00ea35 CG |
523 | case Opt_uignore: |
524 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); | |
525 | break; | |
526 | case Opt_uforget: | |
527 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
528 | break; | |
529 | case Opt_gignore: | |
530 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); | |
531 | break; | |
532 | case Opt_gforget: | |
533 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
534 | break; | |
535 | default: | |
536 | printk(KERN_ERR "udf: bad mount option \"%s\" " | |
537 | "or missing value\n", p); | |
1da177e4 LT |
538 | return 0; |
539 | } | |
540 | } | |
541 | return 1; | |
542 | } | |
543 | ||
bd45a420 | 544 | static void udf_write_super(struct super_block *sb) |
1da177e4 LT |
545 | { |
546 | lock_kernel(); | |
28de7948 | 547 | |
1da177e4 LT |
548 | if (!(sb->s_flags & MS_RDONLY)) |
549 | udf_open_lvid(sb); | |
550 | sb->s_dirt = 0; | |
28de7948 | 551 | |
1da177e4 LT |
552 | unlock_kernel(); |
553 | } | |
554 | ||
cb00ea35 | 555 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
556 | { |
557 | struct udf_options uopt; | |
6c79e987 | 558 | struct udf_sb_info *sbi = UDF_SB(sb); |
1da177e4 | 559 | |
6c79e987 MS |
560 | uopt.flags = sbi->s_flags; |
561 | uopt.uid = sbi->s_uid; | |
562 | uopt.gid = sbi->s_gid; | |
563 | uopt.umask = sbi->s_umask; | |
1da177e4 | 564 | |
6da80894 | 565 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
566 | return -EINVAL; |
567 | ||
6c79e987 MS |
568 | sbi->s_flags = uopt.flags; |
569 | sbi->s_uid = uopt.uid; | |
570 | sbi->s_gid = uopt.gid; | |
571 | sbi->s_umask = uopt.umask; | |
1da177e4 | 572 | |
6c79e987 MS |
573 | if (sbi->s_lvid_bh) { |
574 | int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); | |
1da177e4 LT |
575 | if (write_rev > UDF_MAX_WRITE_VERSION) |
576 | *flags |= MS_RDONLY; | |
577 | } | |
578 | ||
579 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
580 | return 0; | |
581 | if (*flags & MS_RDONLY) | |
582 | udf_close_lvid(sb); | |
583 | else | |
584 | udf_open_lvid(sb); | |
585 | ||
586 | return 0; | |
587 | } | |
588 | ||
cb00ea35 | 589 | static int udf_vrs(struct super_block *sb, int silent) |
1da177e4 LT |
590 | { |
591 | struct volStructDesc *vsd = NULL; | |
592 | int sector = 32768; | |
593 | int sectorsize; | |
594 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
595 | int iso9660 = 0; |
596 | int nsr02 = 0; | |
597 | int nsr03 = 0; | |
6c79e987 | 598 | struct udf_sb_info *sbi; |
1da177e4 LT |
599 | |
600 | /* Block size must be a multiple of 512 */ | |
601 | if (sb->s_blocksize & 511) | |
602 | return 0; | |
6c79e987 | 603 | sbi = UDF_SB(sb); |
1da177e4 LT |
604 | |
605 | if (sb->s_blocksize < sizeof(struct volStructDesc)) | |
606 | sectorsize = sizeof(struct volStructDesc); | |
607 | else | |
608 | sectorsize = sb->s_blocksize; | |
609 | ||
6c79e987 | 610 | sector += (sbi->s_session << sb->s_blocksize_bits); |
1da177e4 LT |
611 | |
612 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
cb00ea35 | 613 | (sector >> sb->s_blocksize_bits), sb->s_blocksize); |
1da177e4 | 614 | /* Process the sequence (if applicable) */ |
cb00ea35 | 615 | for (; !nsr02 && !nsr03; sector += sectorsize) { |
1da177e4 LT |
616 | /* Read a block */ |
617 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
618 | if (!bh) | |
619 | break; | |
620 | ||
621 | /* Look for ISO descriptors */ | |
622 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 623 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 624 | |
cb00ea35 | 625 | if (vsd->stdIdent[0] == 0) { |
3bf25cb4 | 626 | brelse(bh); |
1da177e4 | 627 | break; |
3a71fc5d MS |
628 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
629 | VSD_STD_ID_LEN)) { | |
1da177e4 | 630 | iso9660 = sector; |
cb00ea35 CG |
631 | switch (vsd->structType) { |
632 | case 0: | |
633 | udf_debug("ISO9660 Boot Record found\n"); | |
634 | break; | |
635 | case 1: | |
3a71fc5d MS |
636 | udf_debug("ISO9660 Primary Volume Descriptor " |
637 | "found\n"); | |
cb00ea35 CG |
638 | break; |
639 | case 2: | |
3a71fc5d MS |
640 | udf_debug("ISO9660 Supplementary Volume " |
641 | "Descriptor found\n"); | |
cb00ea35 CG |
642 | break; |
643 | case 3: | |
3a71fc5d MS |
644 | udf_debug("ISO9660 Volume Partition Descriptor " |
645 | "found\n"); | |
cb00ea35 CG |
646 | break; |
647 | case 255: | |
3a71fc5d MS |
648 | udf_debug("ISO9660 Volume Descriptor Set " |
649 | "Terminator found\n"); | |
cb00ea35 CG |
650 | break; |
651 | default: | |
652 | udf_debug("ISO9660 VRS (%u) found\n", | |
653 | vsd->structType); | |
654 | break; | |
1da177e4 | 655 | } |
3a71fc5d MS |
656 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
657 | VSD_STD_ID_LEN)) | |
658 | ; /* nothing */ | |
659 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
660 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 661 | brelse(bh); |
1da177e4 | 662 | break; |
3a71fc5d MS |
663 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
664 | VSD_STD_ID_LEN)) | |
1da177e4 | 665 | nsr02 = sector; |
3a71fc5d MS |
666 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
667 | VSD_STD_ID_LEN)) | |
1da177e4 | 668 | nsr03 = sector; |
3bf25cb4 | 669 | brelse(bh); |
1da177e4 LT |
670 | } |
671 | ||
672 | if (nsr03) | |
673 | return nsr03; | |
674 | else if (nsr02) | |
675 | return nsr02; | |
6c79e987 | 676 | else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) |
1da177e4 LT |
677 | return -1; |
678 | else | |
679 | return 0; | |
680 | } | |
681 | ||
682 | /* | |
683 | * udf_find_anchor | |
684 | * | |
685 | * PURPOSE | |
686 | * Find an anchor volume descriptor. | |
687 | * | |
688 | * PRE-CONDITIONS | |
689 | * sb Pointer to _locked_ superblock. | |
690 | * lastblock Last block on media. | |
691 | * | |
692 | * POST-CONDITIONS | |
693 | * <return> 1 if not found, 0 if ok | |
694 | * | |
695 | * HISTORY | |
696 | * July 1, 1997 - Andrew E. Mileski | |
697 | * Written, tested, and released. | |
698 | */ | |
cb00ea35 | 699 | static void udf_find_anchor(struct super_block *sb) |
1da177e4 | 700 | { |
6c79e987 | 701 | int lastblock; |
1da177e4 LT |
702 | struct buffer_head *bh = NULL; |
703 | uint16_t ident; | |
704 | uint32_t location; | |
705 | int i; | |
6c79e987 MS |
706 | struct udf_sb_info *sbi; |
707 | ||
708 | sbi = UDF_SB(sb); | |
709 | lastblock = sbi->s_last_block; | |
1da177e4 | 710 | |
cb00ea35 | 711 | if (lastblock) { |
1da177e4 | 712 | int varlastblock = udf_variable_to_fixed(lastblock); |
28de7948 CG |
713 | int last[] = { lastblock, lastblock - 2, |
714 | lastblock - 150, lastblock - 152, | |
715 | varlastblock, varlastblock - 2, | |
716 | varlastblock - 150, varlastblock - 152 }; | |
1da177e4 LT |
717 | |
718 | lastblock = 0; | |
719 | ||
720 | /* Search for an anchor volume descriptor pointer */ | |
721 | ||
722 | /* according to spec, anchor is in either: | |
723 | * block 256 | |
724 | * lastblock-256 | |
725 | * lastblock | |
726 | * however, if the disc isn't closed, it could be 512 */ | |
727 | ||
e8c96f8c | 728 | for (i = 0; !lastblock && i < ARRAY_SIZE(last); i++) { |
3a71fc5d MS |
729 | ident = location = 0; |
730 | if (last[i] >= 0) { | |
731 | bh = sb_bread(sb, last[i]); | |
732 | if (bh) { | |
733 | tag *t = (tag *)bh->b_data; | |
734 | ident = le16_to_cpu(t->tagIdent); | |
735 | location = le32_to_cpu(t->tagLocation); | |
736 | brelse(bh); | |
737 | } | |
1da177e4 | 738 | } |
e8c96f8c | 739 | |
cb00ea35 | 740 | if (ident == TAG_IDENT_AVDP) { |
6c79e987 MS |
741 | if (location == last[i] - sbi->s_session) { |
742 | lastblock = last[i] - sbi->s_session; | |
743 | sbi->s_anchor[0] = lastblock; | |
744 | sbi->s_anchor[1] = lastblock - 256; | |
4b11111a MS |
745 | } else if (location == |
746 | udf_variable_to_fixed(last[i]) - | |
747 | sbi->s_session) { | |
1da177e4 | 748 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); |
4b11111a MS |
749 | lastblock = |
750 | udf_variable_to_fixed(last[i]) - | |
751 | sbi->s_session; | |
6c79e987 | 752 | sbi->s_anchor[0] = lastblock; |
4b11111a MS |
753 | sbi->s_anchor[1] = lastblock - 256 - |
754 | sbi->s_session; | |
28de7948 | 755 | } else { |
4b11111a MS |
756 | udf_debug("Anchor found at block %d, " |
757 | "location mismatch %d.\n", | |
28de7948 CG |
758 | last[i], location); |
759 | } | |
4b11111a MS |
760 | } else if (ident == TAG_IDENT_FE || |
761 | ident == TAG_IDENT_EFE) { | |
1da177e4 | 762 | lastblock = last[i]; |
6c79e987 | 763 | sbi->s_anchor[3] = 512; |
cb00ea35 | 764 | } else { |
3a71fc5d MS |
765 | ident = location = 0; |
766 | if (last[i] >= 256) { | |
767 | bh = sb_bread(sb, last[i] - 256); | |
768 | if (bh) { | |
769 | tag *t = (tag *)bh->b_data; | |
4b11111a MS |
770 | ident = le16_to_cpu( |
771 | t->tagIdent); | |
772 | location = le32_to_cpu( | |
773 | t->tagLocation); | |
3a71fc5d MS |
774 | brelse(bh); |
775 | } | |
1da177e4 | 776 | } |
cb00ea35 | 777 | |
1da177e4 | 778 | if (ident == TAG_IDENT_AVDP && |
4b11111a MS |
779 | location == last[i] - 256 - |
780 | sbi->s_session) { | |
1da177e4 | 781 | lastblock = last[i]; |
6c79e987 | 782 | sbi->s_anchor[1] = last[i] - 256; |
cb00ea35 | 783 | } else { |
3a71fc5d | 784 | ident = location = 0; |
6c79e987 | 785 | if (last[i] >= 312 + sbi->s_session) { |
4b11111a MS |
786 | bh = sb_bread(sb, |
787 | last[i] - 312 - | |
788 | sbi->s_session); | |
3a71fc5d | 789 | if (bh) { |
4b11111a MS |
790 | tag *t = (tag *) |
791 | bh->b_data; | |
792 | ident = le16_to_cpu( | |
793 | t->tagIdent); | |
794 | location = le32_to_cpu( | |
795 | t->tagLocation); | |
3a71fc5d MS |
796 | brelse(bh); |
797 | } | |
1da177e4 | 798 | } |
cb00ea35 | 799 | |
1da177e4 | 800 | if (ident == TAG_IDENT_AVDP && |
28de7948 | 801 | location == udf_variable_to_fixed(last[i]) - 256) { |
4b11111a MS |
802 | UDF_SET_FLAG(sb, |
803 | UDF_FLAG_VARCONV); | |
28de7948 | 804 | lastblock = udf_variable_to_fixed(last[i]); |
6c79e987 | 805 | sbi->s_anchor[1] = lastblock - 256; |
1da177e4 LT |
806 | } |
807 | } | |
808 | } | |
809 | } | |
810 | } | |
811 | ||
cb00ea35 | 812 | if (!lastblock) { |
3a71fc5d | 813 | /* We haven't found the lastblock. check 312 */ |
6c79e987 | 814 | bh = sb_bread(sb, 312 + sbi->s_session); |
3a71fc5d MS |
815 | if (bh) { |
816 | tag *t = (tag *)bh->b_data; | |
817 | ident = le16_to_cpu(t->tagIdent); | |
818 | location = le32_to_cpu(t->tagLocation); | |
3bf25cb4 | 819 | brelse(bh); |
1da177e4 LT |
820 | |
821 | if (ident == TAG_IDENT_AVDP && location == 256) | |
822 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
823 | } | |
824 | } | |
825 | ||
6c79e987 MS |
826 | for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) { |
827 | if (sbi->s_anchor[i]) { | |
828 | bh = udf_read_tagged(sb, sbi->s_anchor[i], | |
829 | sbi->s_anchor[i], &ident); | |
3a71fc5d | 830 | if (!bh) |
6c79e987 | 831 | sbi->s_anchor[i] = 0; |
3a71fc5d | 832 | else { |
3bf25cb4 | 833 | brelse(bh); |
28de7948 | 834 | if ((ident != TAG_IDENT_AVDP) && |
4b11111a MS |
835 | (i || (ident != TAG_IDENT_FE && |
836 | ident != TAG_IDENT_EFE))) | |
6c79e987 | 837 | sbi->s_anchor[i] = 0; |
1da177e4 LT |
838 | } |
839 | } | |
840 | } | |
841 | ||
6c79e987 | 842 | sbi->s_last_block = lastblock; |
1da177e4 LT |
843 | } |
844 | ||
3a71fc5d MS |
845 | static int udf_find_fileset(struct super_block *sb, |
846 | kernel_lb_addr *fileset, | |
847 | kernel_lb_addr *root) | |
1da177e4 LT |
848 | { |
849 | struct buffer_head *bh = NULL; | |
850 | long lastblock; | |
851 | uint16_t ident; | |
6c79e987 | 852 | struct udf_sb_info *sbi; |
1da177e4 LT |
853 | |
854 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 855 | fileset->partitionReferenceNum != 0xFFFF) { |
1da177e4 LT |
856 | bh = udf_read_ptagged(sb, *fileset, 0, &ident); |
857 | ||
28de7948 | 858 | if (!bh) { |
1da177e4 | 859 | return 1; |
28de7948 | 860 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 861 | brelse(bh); |
1da177e4 LT |
862 | return 1; |
863 | } | |
cb00ea35 | 864 | |
1da177e4 LT |
865 | } |
866 | ||
6c79e987 | 867 | sbi = UDF_SB(sb); |
3a71fc5d MS |
868 | if (!bh) { |
869 | /* Search backwards through the partitions */ | |
1da177e4 LT |
870 | kernel_lb_addr newfileset; |
871 | ||
28de7948 | 872 | /* --> cvg: FIXME - is it reasonable? */ |
1da177e4 | 873 | return 1; |
cb00ea35 | 874 | |
6c79e987 | 875 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
cb00ea35 CG |
876 | (newfileset.partitionReferenceNum != 0xFFFF && |
877 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
878 | fileset->partitionReferenceNum == 0xFFFF); | |
879 | newfileset.partitionReferenceNum--) { | |
6c79e987 MS |
880 | lastblock = sbi->s_partmaps |
881 | [newfileset.partitionReferenceNum] | |
882 | .s_partition_len; | |
1da177e4 LT |
883 | newfileset.logicalBlockNum = 0; |
884 | ||
cb00ea35 | 885 | do { |
3a71fc5d MS |
886 | bh = udf_read_ptagged(sb, newfileset, 0, |
887 | &ident); | |
cb00ea35 CG |
888 | if (!bh) { |
889 | newfileset.logicalBlockNum++; | |
1da177e4 LT |
890 | continue; |
891 | } | |
892 | ||
cb00ea35 CG |
893 | switch (ident) { |
894 | case TAG_IDENT_SBD: | |
28de7948 CG |
895 | { |
896 | struct spaceBitmapDesc *sp; | |
4b11111a MS |
897 | sp = (struct spaceBitmapDesc *) |
898 | bh->b_data; | |
28de7948 CG |
899 | newfileset.logicalBlockNum += 1 + |
900 | ((le32_to_cpu(sp->numOfBytes) + | |
4b11111a MS |
901 | sizeof(struct spaceBitmapDesc) |
902 | - 1) >> sb->s_blocksize_bits); | |
28de7948 CG |
903 | brelse(bh); |
904 | break; | |
905 | } | |
cb00ea35 | 906 | case TAG_IDENT_FSD: |
28de7948 CG |
907 | *fileset = newfileset; |
908 | break; | |
cb00ea35 | 909 | default: |
28de7948 CG |
910 | newfileset.logicalBlockNum++; |
911 | brelse(bh); | |
912 | bh = NULL; | |
913 | break; | |
1da177e4 | 914 | } |
28de7948 CG |
915 | } while (newfileset.logicalBlockNum < lastblock && |
916 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
917 | fileset->partitionReferenceNum == 0xFFFF); | |
1da177e4 LT |
918 | } |
919 | } | |
920 | ||
921 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 922 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
1da177e4 | 923 | udf_debug("Fileset at block=%d, partition=%d\n", |
cb00ea35 CG |
924 | fileset->logicalBlockNum, |
925 | fileset->partitionReferenceNum); | |
1da177e4 | 926 | |
6c79e987 | 927 | sbi->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 928 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 929 | brelse(bh); |
1da177e4 LT |
930 | return 0; |
931 | } | |
932 | return 1; | |
933 | } | |
934 | ||
cb00ea35 | 935 | static void udf_load_pvoldesc(struct super_block *sb, struct buffer_head *bh) |
1da177e4 LT |
936 | { |
937 | struct primaryVolDesc *pvoldesc; | |
938 | time_t recording; | |
939 | long recording_usec; | |
940 | struct ustr instr; | |
941 | struct ustr outstr; | |
942 | ||
943 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
944 | ||
cb00ea35 CG |
945 | if (udf_stamp_to_time(&recording, &recording_usec, |
946 | lets_to_cpu(pvoldesc->recordingDateAndTime))) { | |
1da177e4 LT |
947 | kernel_timestamp ts; |
948 | ts = lets_to_cpu(pvoldesc->recordingDateAndTime); | |
3a71fc5d MS |
949 | udf_debug("recording time %ld/%ld, %04u/%02u/%02u" |
950 | " %02u:%02u (%x)\n", | |
28de7948 CG |
951 | recording, recording_usec, |
952 | ts.year, ts.month, ts.day, ts.hour, | |
953 | ts.minute, ts.typeAndTimezone); | |
6c79e987 MS |
954 | UDF_SB(sb)->s_record_time.tv_sec = recording; |
955 | UDF_SB(sb)->s_record_time.tv_nsec = recording_usec * 1000; | |
1da177e4 LT |
956 | } |
957 | ||
4b11111a | 958 | if (!udf_build_ustr(&instr, pvoldesc->volIdent, 32)) |
cb00ea35 | 959 | if (udf_CS0toUTF8(&outstr, &instr)) { |
6c79e987 | 960 | strncpy(UDF_SB(sb)->s_volume_ident, outstr.u_name, |
1da177e4 | 961 | outstr.u_len > 31 ? 31 : outstr.u_len); |
4b11111a MS |
962 | udf_debug("volIdent[] = '%s'\n", |
963 | UDF_SB(sb)->s_volume_ident); | |
1da177e4 | 964 | } |
1da177e4 | 965 | |
4b11111a | 966 | if (!udf_build_ustr(&instr, pvoldesc->volSetIdent, 128)) |
1da177e4 LT |
967 | if (udf_CS0toUTF8(&outstr, &instr)) |
968 | udf_debug("volSetIdent[] = '%s'\n", outstr.u_name); | |
1da177e4 LT |
969 | } |
970 | ||
28de7948 CG |
971 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
972 | kernel_lb_addr *root) | |
1da177e4 LT |
973 | { |
974 | struct fileSetDesc *fset; | |
975 | ||
976 | fset = (struct fileSetDesc *)bh->b_data; | |
977 | ||
978 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
979 | ||
6c79e987 | 980 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 981 | |
cb00ea35 CG |
982 | udf_debug("Rootdir at block=%d, partition=%d\n", |
983 | root->logicalBlockNum, root->partitionReferenceNum); | |
1da177e4 LT |
984 | } |
985 | ||
883cb9d1 MS |
986 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
987 | { | |
988 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
989 | return DIV_ROUND_UP(map->s_partition_len + |
990 | (sizeof(struct spaceBitmapDesc) << 3), | |
991 | sb->s_blocksize * 8); | |
883cb9d1 MS |
992 | } |
993 | ||
66e1da3f MS |
994 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
995 | { | |
66e1da3f MS |
996 | struct udf_bitmap *bitmap; |
997 | int nr_groups; | |
998 | int size; | |
999 | ||
883cb9d1 | 1000 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
1001 | size = sizeof(struct udf_bitmap) + |
1002 | (sizeof(struct buffer_head *) * nr_groups); | |
1003 | ||
1004 | if (size <= PAGE_SIZE) | |
1005 | bitmap = kmalloc(size, GFP_KERNEL); | |
1006 | else | |
1007 | bitmap = vmalloc(size); /* TODO: get rid of vmalloc */ | |
1008 | ||
1009 | if (bitmap == NULL) { | |
1010 | udf_error(sb, __FUNCTION__, | |
1011 | "Unable to allocate space for bitmap " | |
1012 | "and %d buffer_head pointers", nr_groups); | |
1013 | return NULL; | |
1014 | } | |
1015 | ||
1016 | memset(bitmap, 0x00, size); | |
1017 | bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); | |
1018 | bitmap->s_nr_groups = nr_groups; | |
1019 | return bitmap; | |
1020 | } | |
1021 | ||
bcec4477 | 1022 | static int udf_load_partdesc(struct super_block *sb, struct buffer_head *bh) |
1da177e4 LT |
1023 | { |
1024 | struct partitionDesc *p; | |
1025 | int i; | |
6c79e987 MS |
1026 | struct udf_part_map *map; |
1027 | struct udf_sb_info *sbi; | |
1da177e4 LT |
1028 | |
1029 | p = (struct partitionDesc *)bh->b_data; | |
6c79e987 | 1030 | sbi = UDF_SB(sb); |
1da177e4 | 1031 | |
6c79e987 MS |
1032 | for (i = 0; i < sbi->s_partitions; i++) { |
1033 | map = &sbi->s_partmaps[i]; | |
cb00ea35 | 1034 | udf_debug("Searching map: (%d == %d)\n", |
4b11111a MS |
1035 | map->s_partition_num, |
1036 | le16_to_cpu(p->partitionNumber)); | |
1037 | if (map->s_partition_num == | |
1038 | le16_to_cpu(p->partitionNumber)) { | |
1039 | map->s_partition_len = | |
1040 | le32_to_cpu(p->partitionLength); /* blocks */ | |
1041 | map->s_partition_root = | |
1042 | le32_to_cpu(p->partitionStartingLocation); | |
5e0f0017 MS |
1043 | if (p->accessType == |
1044 | cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
4b11111a MS |
1045 | map->s_partition_flags |= |
1046 | UDF_PART_FLAG_READ_ONLY; | |
5e0f0017 MS |
1047 | if (p->accessType == |
1048 | cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
4b11111a MS |
1049 | map->s_partition_flags |= |
1050 | UDF_PART_FLAG_WRITE_ONCE; | |
5e0f0017 MS |
1051 | if (p->accessType == |
1052 | cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
4b11111a MS |
1053 | map->s_partition_flags |= |
1054 | UDF_PART_FLAG_REWRITABLE; | |
5e0f0017 MS |
1055 | if (p->accessType == |
1056 | cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
4b11111a MS |
1057 | map->s_partition_flags |= |
1058 | UDF_PART_FLAG_OVERWRITABLE; | |
28de7948 | 1059 | |
3a71fc5d MS |
1060 | if (!strcmp(p->partitionContents.ident, |
1061 | PD_PARTITION_CONTENTS_NSR02) || | |
1062 | !strcmp(p->partitionContents.ident, | |
1063 | PD_PARTITION_CONTENTS_NSR03)) { | |
1da177e4 LT |
1064 | struct partitionHeaderDesc *phd; |
1065 | ||
4b11111a MS |
1066 | phd = (struct partitionHeaderDesc *) |
1067 | (p->partitionContentsUse); | |
cb00ea35 | 1068 | if (phd->unallocSpaceTable.extLength) { |
28de7948 CG |
1069 | kernel_lb_addr loc = { |
1070 | .logicalBlockNum = le32_to_cpu(phd->unallocSpaceTable.extPosition), | |
1071 | .partitionReferenceNum = i, | |
1072 | }; | |
1073 | ||
6c79e987 | 1074 | map->s_uspace.s_table = |
28de7948 | 1075 | udf_iget(sb, loc); |
6c79e987 | 1076 | if (!map->s_uspace.s_table) { |
b1e7a4b1 | 1077 | udf_debug("cannot load unallocSpaceTable (part %d)\n", i); |
bcec4477 JK |
1078 | return 1; |
1079 | } | |
4b11111a MS |
1080 | map->s_partition_flags |= |
1081 | UDF_PART_FLAG_UNALLOC_TABLE; | |
28de7948 | 1082 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", |
6c79e987 | 1083 | i, map->s_uspace.s_table->i_ino); |
1da177e4 | 1084 | } |
cb00ea35 | 1085 | if (phd->unallocSpaceBitmap.extLength) { |
4b11111a MS |
1086 | struct udf_bitmap *bitmap = |
1087 | udf_sb_alloc_bitmap(sb, i); | |
1088 | map->s_uspace.s_bitmap = bitmap; | |
1089 | if (bitmap != NULL) { | |
1090 | bitmap->s_extLength = | |
28de7948 | 1091 | le32_to_cpu(phd->unallocSpaceBitmap.extLength); |
4b11111a | 1092 | bitmap->s_extPosition = |
28de7948 | 1093 | le32_to_cpu(phd->unallocSpaceBitmap.extPosition); |
6c79e987 | 1094 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
28de7948 | 1095 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", |
4b11111a | 1096 | i, bitmap->s_extPosition); |
1da177e4 LT |
1097 | } |
1098 | } | |
1099 | if (phd->partitionIntegrityTable.extLength) | |
28de7948 | 1100 | udf_debug("partitionIntegrityTable (part %d)\n", i); |
cb00ea35 | 1101 | if (phd->freedSpaceTable.extLength) { |
28de7948 CG |
1102 | kernel_lb_addr loc = { |
1103 | .logicalBlockNum = le32_to_cpu(phd->freedSpaceTable.extPosition), | |
1104 | .partitionReferenceNum = i, | |
1105 | }; | |
1106 | ||
6c79e987 | 1107 | map->s_fspace.s_table = |
28de7948 | 1108 | udf_iget(sb, loc); |
6c79e987 | 1109 | if (!map->s_fspace.s_table) { |
b1e7a4b1 | 1110 | udf_debug("cannot load freedSpaceTable (part %d)\n", i); |
bcec4477 JK |
1111 | return 1; |
1112 | } | |
4b11111a MS |
1113 | map->s_partition_flags |= |
1114 | UDF_PART_FLAG_FREED_TABLE; | |
28de7948 | 1115 | udf_debug("freedSpaceTable (part %d) @ %ld\n", |
6c79e987 | 1116 | i, map->s_fspace.s_table->i_ino); |
1da177e4 | 1117 | } |
cb00ea35 | 1118 | if (phd->freedSpaceBitmap.extLength) { |
4b11111a MS |
1119 | struct udf_bitmap *bitmap = |
1120 | udf_sb_alloc_bitmap(sb, i); | |
1121 | map->s_fspace.s_bitmap = bitmap; | |
1122 | if (bitmap != NULL) { | |
1123 | bitmap->s_extLength = | |
28de7948 | 1124 | le32_to_cpu(phd->freedSpaceBitmap.extLength); |
4b11111a | 1125 | bitmap->s_extPosition = |
28de7948 | 1126 | le32_to_cpu(phd->freedSpaceBitmap.extPosition); |
6c79e987 | 1127 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
28de7948 | 1128 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", |
4b11111a | 1129 | i, bitmap->s_extPosition); |
1da177e4 LT |
1130 | } |
1131 | } | |
1132 | } | |
1133 | break; | |
1134 | } | |
1135 | } | |
4b11111a | 1136 | if (i == sbi->s_partitions) |
cb00ea35 CG |
1137 | udf_debug("Partition (%d) not found in partition map\n", |
1138 | le16_to_cpu(p->partitionNumber)); | |
4b11111a | 1139 | else |
3a71fc5d MS |
1140 | udf_debug("Partition (%d:%d type %x) starts at physical %d, " |
1141 | "block length %d\n", | |
1142 | le16_to_cpu(p->partitionNumber), i, | |
6c79e987 MS |
1143 | map->s_partition_type, |
1144 | map->s_partition_root, | |
1145 | map->s_partition_len); | |
bcec4477 | 1146 | return 0; |
1da177e4 LT |
1147 | } |
1148 | ||
28de7948 CG |
1149 | static int udf_load_logicalvol(struct super_block *sb, struct buffer_head *bh, |
1150 | kernel_lb_addr *fileset) | |
1da177e4 LT |
1151 | { |
1152 | struct logicalVolDesc *lvd; | |
1153 | int i, j, offset; | |
1154 | uint8_t type; | |
6c79e987 | 1155 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1156 | struct genericPartitionMap *gpm; |
1da177e4 LT |
1157 | |
1158 | lvd = (struct logicalVolDesc *)bh->b_data; | |
1159 | ||
dc5d39be MS |
1160 | i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
1161 | if (i != 0) | |
1162 | return i; | |
1da177e4 | 1163 | |
cb00ea35 | 1164 | for (i = 0, offset = 0; |
6c79e987 | 1165 | i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength); |
4b11111a MS |
1166 | i++, offset += gpm->partitionMapLength) { |
1167 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1168 | gpm = (struct genericPartitionMap *) | |
1169 | &(lvd->partitionMaps[offset]); | |
1170 | type = gpm->partitionMapType; | |
cb00ea35 | 1171 | if (type == 1) { |
4b11111a MS |
1172 | struct genericPartitionMap1 *gpm1 = |
1173 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1174 | map->s_partition_type = UDF_TYPE1_MAP15; |
1175 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1176 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1177 | map->s_partition_func = NULL; | |
cb00ea35 | 1178 | } else if (type == 2) { |
4b11111a MS |
1179 | struct udfPartitionMap2 *upm2 = |
1180 | (struct udfPartitionMap2 *)gpm; | |
1181 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1182 | strlen(UDF_ID_VIRTUAL))) { | |
1183 | u16 suf = | |
1184 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1185 | identSuffix)[0]); | |
1186 | if (suf == 0x0150) { | |
1187 | map->s_partition_type = | |
1188 | UDF_VIRTUAL_MAP15; | |
1189 | map->s_partition_func = | |
1190 | udf_get_pblock_virt15; | |
1191 | } else if (suf == 0x0200) { | |
1192 | map->s_partition_type = | |
1193 | UDF_VIRTUAL_MAP20; | |
1194 | map->s_partition_func = | |
1195 | udf_get_pblock_virt20; | |
1da177e4 | 1196 | } |
4b11111a MS |
1197 | } else if (!strncmp(upm2->partIdent.ident, |
1198 | UDF_ID_SPARABLE, | |
1199 | strlen(UDF_ID_SPARABLE))) { | |
1da177e4 LT |
1200 | uint32_t loc; |
1201 | uint16_t ident; | |
1202 | struct sparingTable *st; | |
4b11111a MS |
1203 | struct sparablePartitionMap *spm = |
1204 | (struct sparablePartitionMap *)gpm; | |
28de7948 | 1205 | |
6c79e987 | 1206 | map->s_partition_type = UDF_SPARABLE_MAP15; |
4b11111a MS |
1207 | map->s_type_specific.s_sparing.s_packet_len = |
1208 | le16_to_cpu(spm->packetLength); | |
cb00ea35 | 1209 | for (j = 0; j < spm->numSparingTables; j++) { |
4b11111a MS |
1210 | struct buffer_head *bh2; |
1211 | ||
1212 | loc = le32_to_cpu( | |
1213 | spm->locSparingTable[j]); | |
1214 | bh2 = udf_read_tagged(sb, loc, loc, | |
1215 | &ident); | |
1216 | map->s_type_specific.s_sparing. | |
1217 | s_spar_map[j] = bh2; | |
1218 | ||
1219 | if (bh2 != NULL) { | |
1220 | st = (struct sparingTable *) | |
1221 | bh2->b_data; | |
1222 | if (ident != 0 || strncmp( | |
1223 | st->sparingIdent.ident, | |
1224 | UDF_ID_SPARING, | |
1225 | strlen(UDF_ID_SPARING))) { | |
1226 | brelse(bh2); | |
1227 | map->s_type_specific. | |
1228 | s_sparing. | |
1229 | s_spar_map[j] = | |
1230 | NULL; | |
1da177e4 LT |
1231 | } |
1232 | } | |
1233 | } | |
6c79e987 | 1234 | map->s_partition_func = udf_get_pblock_spar15; |
cb00ea35 | 1235 | } else { |
3a71fc5d MS |
1236 | udf_debug("Unknown ident: %s\n", |
1237 | upm2->partIdent.ident); | |
1da177e4 LT |
1238 | continue; |
1239 | } | |
6c79e987 MS |
1240 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1241 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 LT |
1242 | } |
1243 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
6c79e987 MS |
1244 | i, map->s_partition_num, type, |
1245 | map->s_volumeseqnum); | |
1da177e4 LT |
1246 | } |
1247 | ||
cb00ea35 | 1248 | if (fileset) { |
28de7948 | 1249 | long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1250 | |
1251 | *fileset = lelb_to_cpu(la->extLocation); | |
3a71fc5d MS |
1252 | udf_debug("FileSet found in LogicalVolDesc at block=%d, " |
1253 | "partition=%d\n", fileset->logicalBlockNum, | |
28de7948 | 1254 | fileset->partitionReferenceNum); |
1da177e4 LT |
1255 | } |
1256 | if (lvd->integritySeqExt.extLength) | |
1257 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
28de7948 | 1258 | |
1da177e4 LT |
1259 | return 0; |
1260 | } | |
1261 | ||
1262 | /* | |
1263 | * udf_load_logicalvolint | |
1264 | * | |
1265 | */ | |
cb00ea35 | 1266 | static void udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc) |
1da177e4 LT |
1267 | { |
1268 | struct buffer_head *bh = NULL; | |
1269 | uint16_t ident; | |
6c79e987 MS |
1270 | struct udf_sb_info *sbi = UDF_SB(sb); |
1271 | struct logicalVolIntegrityDesc *lvid; | |
1da177e4 LT |
1272 | |
1273 | while (loc.extLength > 0 && | |
cb00ea35 CG |
1274 | (bh = udf_read_tagged(sb, loc.extLocation, |
1275 | loc.extLocation, &ident)) && | |
1276 | ident == TAG_IDENT_LVID) { | |
6c79e987 MS |
1277 | sbi->s_lvid_bh = bh; |
1278 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
cb00ea35 | 1279 | |
6c79e987 | 1280 | if (lvid->nextIntegrityExt.extLength) |
3a71fc5d | 1281 | udf_load_logicalvolint(sb, |
6c79e987 | 1282 | leea_to_cpu(lvid->nextIntegrityExt)); |
cb00ea35 | 1283 | |
6c79e987 | 1284 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1285 | brelse(bh); |
1da177e4 | 1286 | loc.extLength -= sb->s_blocksize; |
cb00ea35 | 1287 | loc.extLocation++; |
1da177e4 | 1288 | } |
6c79e987 | 1289 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1290 | brelse(bh); |
1da177e4 LT |
1291 | } |
1292 | ||
1293 | /* | |
1294 | * udf_process_sequence | |
1295 | * | |
1296 | * PURPOSE | |
1297 | * Process a main/reserve volume descriptor sequence. | |
1298 | * | |
1299 | * PRE-CONDITIONS | |
1300 | * sb Pointer to _locked_ superblock. | |
1301 | * block First block of first extent of the sequence. | |
1302 | * lastblock Lastblock of first extent of the sequence. | |
1303 | * | |
1304 | * HISTORY | |
1305 | * July 1, 1997 - Andrew E. Mileski | |
1306 | * Written, tested, and released. | |
1307 | */ | |
3a71fc5d MS |
1308 | static int udf_process_sequence(struct super_block *sb, long block, |
1309 | long lastblock, kernel_lb_addr *fileset) | |
1da177e4 LT |
1310 | { |
1311 | struct buffer_head *bh = NULL; | |
1312 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
4b11111a | 1313 | struct udf_vds_record *curr; |
1da177e4 LT |
1314 | struct generic_desc *gd; |
1315 | struct volDescPtr *vdp; | |
cb00ea35 CG |
1316 | int done = 0; |
1317 | int i, j; | |
1da177e4 LT |
1318 | uint32_t vdsn; |
1319 | uint16_t ident; | |
1320 | long next_s = 0, next_e = 0; | |
1321 | ||
1322 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1323 | ||
1324 | /* Read the main descriptor sequence */ | |
cb00ea35 | 1325 | for (; (!done && block <= lastblock); block++) { |
1da177e4 LT |
1326 | |
1327 | bh = udf_read_tagged(sb, block, block, &ident); | |
cb00ea35 | 1328 | if (!bh) |
1da177e4 LT |
1329 | break; |
1330 | ||
1331 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1332 | gd = (struct generic_desc *)bh->b_data; | |
1333 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1334 | switch (ident) { |
28de7948 | 1335 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
4b11111a MS |
1336 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
1337 | if (vdsn >= curr->volDescSeqNum) { | |
1338 | curr->volDescSeqNum = vdsn; | |
1339 | curr->block = block; | |
cb00ea35 CG |
1340 | } |
1341 | break; | |
28de7948 | 1342 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
4b11111a MS |
1343 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
1344 | if (vdsn >= curr->volDescSeqNum) { | |
1345 | curr->volDescSeqNum = vdsn; | |
1346 | curr->block = block; | |
cb00ea35 CG |
1347 | |
1348 | vdp = (struct volDescPtr *)bh->b_data; | |
4b11111a MS |
1349 | next_s = le32_to_cpu( |
1350 | vdp->nextVolDescSeqExt.extLocation); | |
1351 | next_e = le32_to_cpu( | |
1352 | vdp->nextVolDescSeqExt.extLength); | |
cb00ea35 CG |
1353 | next_e = next_e >> sb->s_blocksize_bits; |
1354 | next_e += next_s; | |
1355 | } | |
1356 | break; | |
28de7948 | 1357 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
4b11111a MS |
1358 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
1359 | if (vdsn >= curr->volDescSeqNum) { | |
1360 | curr->volDescSeqNum = vdsn; | |
1361 | curr->block = block; | |
cb00ea35 CG |
1362 | } |
1363 | break; | |
28de7948 | 1364 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
4b11111a MS |
1365 | curr = &vds[VDS_POS_PARTITION_DESC]; |
1366 | if (!curr->block) | |
1367 | curr->block = block; | |
cb00ea35 | 1368 | break; |
28de7948 | 1369 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
4b11111a MS |
1370 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
1371 | if (vdsn >= curr->volDescSeqNum) { | |
1372 | curr->volDescSeqNum = vdsn; | |
1373 | curr->block = block; | |
cb00ea35 CG |
1374 | } |
1375 | break; | |
28de7948 | 1376 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
4b11111a MS |
1377 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
1378 | if (vdsn >= curr->volDescSeqNum) { | |
1379 | curr->volDescSeqNum = vdsn; | |
1380 | curr->block = block; | |
cb00ea35 CG |
1381 | } |
1382 | break; | |
28de7948 | 1383 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
cb00ea35 CG |
1384 | vds[VDS_POS_TERMINATING_DESC].block = block; |
1385 | if (next_e) { | |
1386 | block = next_s; | |
1387 | lastblock = next_e; | |
1388 | next_s = next_e = 0; | |
4b11111a | 1389 | } else |
cb00ea35 CG |
1390 | done = 1; |
1391 | break; | |
1da177e4 | 1392 | } |
3bf25cb4 | 1393 | brelse(bh); |
1da177e4 | 1394 | } |
cb00ea35 CG |
1395 | for (i = 0; i < VDS_POS_LENGTH; i++) { |
1396 | if (vds[i].block) { | |
3a71fc5d MS |
1397 | bh = udf_read_tagged(sb, vds[i].block, vds[i].block, |
1398 | &ident); | |
1da177e4 | 1399 | |
28de7948 | 1400 | if (i == VDS_POS_PRIMARY_VOL_DESC) { |
1da177e4 | 1401 | udf_load_pvoldesc(sb, bh); |
28de7948 | 1402 | } else if (i == VDS_POS_LOGICAL_VOL_DESC) { |
deae6cfc MS |
1403 | if (udf_load_logicalvol(sb, bh, fileset)) { |
1404 | brelse(bh); | |
1405 | return 1; | |
1406 | } | |
28de7948 | 1407 | } else if (i == VDS_POS_PARTITION_DESC) { |
1da177e4 | 1408 | struct buffer_head *bh2 = NULL; |
bcec4477 JK |
1409 | if (udf_load_partdesc(sb, bh)) { |
1410 | brelse(bh); | |
1411 | return 1; | |
1412 | } | |
3a71fc5d MS |
1413 | for (j = vds[i].block + 1; |
1414 | j < vds[VDS_POS_TERMINATING_DESC].block; | |
1415 | j++) { | |
1da177e4 LT |
1416 | bh2 = udf_read_tagged(sb, j, j, &ident); |
1417 | gd = (struct generic_desc *)bh2->b_data; | |
1418 | if (ident == TAG_IDENT_PD) | |
3a71fc5d MS |
1419 | if (udf_load_partdesc(sb, |
1420 | bh2)) { | |
bcec4477 JK |
1421 | brelse(bh); |
1422 | brelse(bh2); | |
1423 | return 1; | |
1424 | } | |
3bf25cb4 | 1425 | brelse(bh2); |
1da177e4 LT |
1426 | } |
1427 | } | |
3bf25cb4 | 1428 | brelse(bh); |
1da177e4 LT |
1429 | } |
1430 | } | |
1431 | ||
1432 | return 0; | |
1433 | } | |
1434 | ||
1435 | /* | |
1436 | * udf_check_valid() | |
1437 | */ | |
cb00ea35 | 1438 | static int udf_check_valid(struct super_block *sb, int novrs, int silent) |
1da177e4 LT |
1439 | { |
1440 | long block; | |
1441 | ||
cb00ea35 | 1442 | if (novrs) { |
1da177e4 LT |
1443 | udf_debug("Validity check skipped because of novrs option\n"); |
1444 | return 0; | |
1445 | } | |
1446 | /* Check that it is NSR02 compliant */ | |
1447 | /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
3a71fc5d MS |
1448 | else { |
1449 | block = udf_vrs(sb, silent); | |
1450 | if (block == -1) { | |
6c79e987 | 1451 | struct udf_sb_info *sbi = UDF_SB(sb); |
3a71fc5d MS |
1452 | udf_debug("Failed to read byte 32768. Assuming open " |
1453 | "disc. Skipping validity check\n"); | |
6c79e987 MS |
1454 | if (!sbi->s_last_block) |
1455 | sbi->s_last_block = udf_get_last_block(sb); | |
3a71fc5d MS |
1456 | return 0; |
1457 | } else | |
1458 | return !block; | |
28de7948 | 1459 | } |
1da177e4 LT |
1460 | } |
1461 | ||
28de7948 | 1462 | static int udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset) |
1da177e4 LT |
1463 | { |
1464 | struct anchorVolDescPtr *anchor; | |
1465 | uint16_t ident; | |
1466 | struct buffer_head *bh; | |
1467 | long main_s, main_e, reserve_s, reserve_e; | |
1468 | int i, j; | |
6c79e987 | 1469 | struct udf_sb_info *sbi; |
1da177e4 LT |
1470 | |
1471 | if (!sb) | |
1472 | return 1; | |
6c79e987 | 1473 | sbi = UDF_SB(sb); |
1da177e4 | 1474 | |
6c79e987 | 1475 | for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) { |
28f7c4d4 MS |
1476 | if (!sbi->s_anchor[i]) |
1477 | continue; | |
1478 | bh = udf_read_tagged(sb, sbi->s_anchor[i], sbi->s_anchor[i], | |
1479 | &ident); | |
1480 | if (!bh) | |
1481 | continue; | |
1482 | ||
1483 | anchor = (struct anchorVolDescPtr *)bh->b_data; | |
1484 | ||
1485 | /* Locate the main sequence */ | |
1486 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1487 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1488 | main_e = main_e >> sb->s_blocksize_bits; | |
1489 | main_e += main_s; | |
1490 | ||
1491 | /* Locate the reserve sequence */ | |
1492 | reserve_s = le32_to_cpu( | |
4b11111a | 1493 | anchor->reserveVolDescSeqExt.extLocation); |
28f7c4d4 | 1494 | reserve_e = le32_to_cpu( |
4b11111a | 1495 | anchor->reserveVolDescSeqExt.extLength); |
28f7c4d4 MS |
1496 | reserve_e = reserve_e >> sb->s_blocksize_bits; |
1497 | reserve_e += reserve_s; | |
1da177e4 | 1498 | |
28f7c4d4 | 1499 | brelse(bh); |
1da177e4 | 1500 | |
28f7c4d4 MS |
1501 | /* Process the main & reserve sequences */ |
1502 | /* responsible for finding the PartitionDesc(s) */ | |
1503 | if (!(udf_process_sequence(sb, main_s, main_e, | |
1504 | fileset) && | |
1505 | udf_process_sequence(sb, reserve_s, reserve_e, | |
1506 | fileset))) | |
1507 | break; | |
1da177e4 LT |
1508 | } |
1509 | ||
6c79e987 | 1510 | if (i == ARRAY_SIZE(sbi->s_anchor)) { |
1da177e4 LT |
1511 | udf_debug("No Anchor block found\n"); |
1512 | return 1; | |
28f7c4d4 MS |
1513 | } |
1514 | udf_debug("Using anchor in block %d\n", sbi->s_anchor[i]); | |
1da177e4 | 1515 | |
6c79e987 | 1516 | for (i = 0; i < sbi->s_partitions; i++) { |
28de7948 | 1517 | kernel_lb_addr uninitialized_var(ino); |
6c79e987 MS |
1518 | struct udf_part_map *map = &sbi->s_partmaps[i]; |
1519 | switch (map->s_partition_type) { | |
cb00ea35 CG |
1520 | case UDF_VIRTUAL_MAP15: |
1521 | case UDF_VIRTUAL_MAP20: | |
6c79e987 MS |
1522 | if (!sbi->s_last_block) { |
1523 | sbi->s_last_block = udf_get_last_block(sb); | |
28de7948 CG |
1524 | udf_find_anchor(sb); |
1525 | } | |
1da177e4 | 1526 | |
6c79e987 | 1527 | if (!sbi->s_last_block) { |
28de7948 | 1528 | udf_debug("Unable to determine Lastblock (For " |
b1e7a4b1 | 1529 | "Virtual Partition)\n"); |
28de7948 CG |
1530 | return 1; |
1531 | } | |
1da177e4 | 1532 | |
6c79e987 MS |
1533 | for (j = 0; j < sbi->s_partitions; j++) { |
1534 | struct udf_part_map *map2 = &sbi->s_partmaps[j]; | |
b1e7a4b1 | 1535 | if (j != i && |
4b11111a MS |
1536 | map->s_volumeseqnum == |
1537 | map2->s_volumeseqnum && | |
1538 | map->s_partition_num == | |
1539 | map2->s_partition_num) { | |
28de7948 | 1540 | ino.partitionReferenceNum = j; |
4b11111a MS |
1541 | ino.logicalBlockNum = |
1542 | sbi->s_last_block - | |
1543 | map2->s_partition_root; | |
28de7948 | 1544 | break; |
1da177e4 | 1545 | } |
28de7948 | 1546 | } |
1da177e4 | 1547 | |
6c79e987 | 1548 | if (j == sbi->s_partitions) |
28de7948 | 1549 | return 1; |
1da177e4 | 1550 | |
6c79e987 MS |
1551 | sbi->s_vat_inode = udf_iget(sb, ino); |
1552 | if (!sbi->s_vat_inode) | |
28de7948 | 1553 | return 1; |
1da177e4 | 1554 | |
6c79e987 MS |
1555 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { |
1556 | map->s_type_specific.s_virtual.s_start_offset = | |
1557 | udf_ext0_offset(sbi->s_vat_inode); | |
1558 | map->s_type_specific.s_virtual.s_num_entries = | |
1559 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1560 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
28de7948 | 1561 | uint32_t pos; |
4b11111a | 1562 | struct virtualAllocationTable20 *vat20; |
1da177e4 | 1563 | |
6c79e987 | 1564 | pos = udf_block_map(sbi->s_vat_inode, 0); |
28de7948 CG |
1565 | bh = sb_bread(sb, pos); |
1566 | if (!bh) | |
1567 | return 1; | |
4b11111a MS |
1568 | vat20 = (struct virtualAllocationTable20 *) |
1569 | bh->b_data + | |
1570 | udf_ext0_offset(sbi->s_vat_inode); | |
6c79e987 | 1571 | map->s_type_specific.s_virtual.s_start_offset = |
4b11111a | 1572 | le16_to_cpu(vat20->lengthHeader) + |
6c79e987 | 1573 | udf_ext0_offset(sbi->s_vat_inode); |
4b11111a MS |
1574 | map->s_type_specific.s_virtual.s_num_entries = |
1575 | (sbi->s_vat_inode->i_size - | |
1576 | map->s_type_specific.s_virtual. | |
1577 | s_start_offset) >> 2; | |
28de7948 | 1578 | brelse(bh); |
1da177e4 | 1579 | } |
6c79e987 MS |
1580 | map->s_partition_root = udf_get_pblock(sb, 0, i, 0); |
1581 | map->s_partition_len = | |
1582 | sbi->s_partmaps[ino.partitionReferenceNum]. | |
1583 | s_partition_len; | |
1da177e4 LT |
1584 | } |
1585 | } | |
1586 | return 0; | |
1587 | } | |
1588 | ||
1589 | static void udf_open_lvid(struct super_block *sb) | |
1590 | { | |
6c79e987 MS |
1591 | struct udf_sb_info *sbi = UDF_SB(sb); |
1592 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1593 | if (bh) { | |
1da177e4 | 1594 | kernel_timestamp cpu_time; |
4b11111a MS |
1595 | struct logicalVolIntegrityDesc *lvid = |
1596 | (struct logicalVolIntegrityDesc *)bh->b_data; | |
1597 | struct logicalVolIntegrityDescImpUse *lvidiu = | |
1598 | udf_sb_lvidiu(sbi); | |
1da177e4 | 1599 | |
6c79e987 MS |
1600 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
1601 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1da177e4 | 1602 | if (udf_time_to_stamp(&cpu_time, CURRENT_TIME)) |
6c79e987 MS |
1603 | lvid->recordingDateAndTime = cpu_to_lets(cpu_time); |
1604 | lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN; | |
1da177e4 | 1605 | |
4b11111a MS |
1606 | lvid->descTag.descCRC = cpu_to_le16( |
1607 | udf_crc((char *)lvid + sizeof(tag), | |
1608 | le16_to_cpu(lvid->descTag.descCRCLength), | |
1609 | 0)); | |
1da177e4 | 1610 | |
3f2587bb | 1611 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); |
6c79e987 | 1612 | mark_buffer_dirty(bh); |
1da177e4 LT |
1613 | } |
1614 | } | |
1615 | ||
1616 | static void udf_close_lvid(struct super_block *sb) | |
1617 | { | |
28de7948 | 1618 | kernel_timestamp cpu_time; |
6c79e987 MS |
1619 | struct udf_sb_info *sbi = UDF_SB(sb); |
1620 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1621 | struct logicalVolIntegrityDesc *lvid; | |
28de7948 | 1622 | |
6c79e987 MS |
1623 | if (!bh) |
1624 | return; | |
1625 | ||
1626 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1627 | ||
1628 | if (lvid->integrityType == LVID_INTEGRITY_TYPE_OPEN) { | |
4b11111a MS |
1629 | struct logicalVolIntegrityDescImpUse *lvidiu = |
1630 | udf_sb_lvidiu(sbi); | |
6c79e987 MS |
1631 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
1632 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1da177e4 | 1633 | if (udf_time_to_stamp(&cpu_time, CURRENT_TIME)) |
6c79e987 MS |
1634 | lvid->recordingDateAndTime = cpu_to_lets(cpu_time); |
1635 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) | |
4b11111a MS |
1636 | lvidiu->maxUDFWriteRev = |
1637 | cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
6c79e987 MS |
1638 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) |
1639 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
1640 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
1641 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
1642 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
1643 | ||
4b11111a MS |
1644 | lvid->descTag.descCRC = cpu_to_le16( |
1645 | udf_crc((char *)lvid + sizeof(tag), | |
1646 | le16_to_cpu(lvid->descTag.descCRCLength), | |
1647 | 0)); | |
6c79e987 | 1648 | |
3f2587bb | 1649 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); |
6c79e987 | 1650 | mark_buffer_dirty(bh); |
1da177e4 LT |
1651 | } |
1652 | } | |
1653 | ||
66e1da3f MS |
1654 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
1655 | { | |
1656 | int i; | |
1657 | int nr_groups = bitmap->s_nr_groups; | |
4b11111a MS |
1658 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * |
1659 | nr_groups); | |
66e1da3f MS |
1660 | |
1661 | for (i = 0; i < nr_groups; i++) | |
1662 | if (bitmap->s_block_bitmap[i]) | |
1663 | brelse(bitmap->s_block_bitmap[i]); | |
1664 | ||
1665 | if (size <= PAGE_SIZE) | |
1666 | kfree(bitmap); | |
1667 | else | |
1668 | vfree(bitmap); | |
1669 | } | |
1670 | ||
1da177e4 LT |
1671 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
1672 | { | |
1673 | int i; | |
cb00ea35 | 1674 | struct inode *inode = NULL; |
1da177e4 LT |
1675 | struct udf_options uopt; |
1676 | kernel_lb_addr rootdir, fileset; | |
1677 | struct udf_sb_info *sbi; | |
1678 | ||
1679 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
1680 | uopt.uid = -1; | |
1681 | uopt.gid = -1; | |
1682 | uopt.umask = 0; | |
1683 | ||
6c79e987 | 1684 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
1da177e4 LT |
1685 | if (!sbi) |
1686 | return -ENOMEM; | |
28de7948 | 1687 | |
1da177e4 | 1688 | sb->s_fs_info = sbi; |
1da177e4 | 1689 | |
1e7933de | 1690 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 1691 | |
6da80894 | 1692 | if (!udf_parse_options((char *)options, &uopt, false)) |
1da177e4 LT |
1693 | goto error_out; |
1694 | ||
1695 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 1696 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
1da177e4 | 1697 | udf_error(sb, "udf_read_super", |
cb00ea35 | 1698 | "utf8 cannot be combined with iocharset\n"); |
1da177e4 LT |
1699 | goto error_out; |
1700 | } | |
1701 | #ifdef CONFIG_UDF_NLS | |
cb00ea35 | 1702 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
1703 | uopt.nls_map = load_nls_default(); |
1704 | if (!uopt.nls_map) | |
1705 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
1706 | else | |
1707 | udf_debug("Using default NLS map\n"); | |
1708 | } | |
1709 | #endif | |
1710 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
1711 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
1712 | ||
1713 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
1714 | fileset.partitionReferenceNum = 0xFFFF; | |
1715 | ||
6c79e987 MS |
1716 | sbi->s_flags = uopt.flags; |
1717 | sbi->s_uid = uopt.uid; | |
1718 | sbi->s_gid = uopt.gid; | |
1719 | sbi->s_umask = uopt.umask; | |
1720 | sbi->s_nls_map = uopt.nls_map; | |
1da177e4 LT |
1721 | |
1722 | /* Set the block size for all transfers */ | |
f1f73ba8 CH |
1723 | if (!sb_min_blocksize(sb, uopt.blocksize)) { |
1724 | udf_debug("Bad block size (%d)\n", uopt.blocksize); | |
1725 | printk(KERN_ERR "udf: bad block size (%d)\n", uopt.blocksize); | |
1da177e4 | 1726 | goto error_out; |
f1f73ba8 | 1727 | } |
1da177e4 | 1728 | |
cb00ea35 | 1729 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 1730 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 1731 | else |
6c79e987 | 1732 | sbi->s_session = uopt.session; |
1da177e4 | 1733 | |
6c79e987 | 1734 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 1735 | |
6c79e987 MS |
1736 | sbi->s_last_block = uopt.lastblock; |
1737 | sbi->s_anchor[0] = sbi->s_anchor[1] = 0; | |
1738 | sbi->s_anchor[2] = uopt.anchor; | |
1739 | sbi->s_anchor[3] = 256; | |
1da177e4 | 1740 | |
3a71fc5d MS |
1741 | if (udf_check_valid(sb, uopt.novrs, silent)) { |
1742 | /* read volume recognition sequences */ | |
1743 | printk(KERN_WARNING "UDF-fs: No VRS found\n"); | |
cb00ea35 | 1744 | goto error_out; |
1da177e4 LT |
1745 | } |
1746 | ||
1747 | udf_find_anchor(sb); | |
1748 | ||
1749 | /* Fill in the rest of the superblock */ | |
1750 | sb->s_op = &udf_sb_ops; | |
1751 | sb->dq_op = NULL; | |
1752 | sb->s_dirt = 0; | |
1753 | sb->s_magic = UDF_SUPER_MAGIC; | |
1754 | sb->s_time_gran = 1000; | |
1755 | ||
cb00ea35 | 1756 | if (udf_load_partition(sb, &fileset)) { |
3a71fc5d | 1757 | printk(KERN_WARNING "UDF-fs: No partition found (1)\n"); |
1da177e4 LT |
1758 | goto error_out; |
1759 | } | |
1760 | ||
6c79e987 | 1761 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
1da177e4 | 1762 | |
6c79e987 | 1763 | if (sbi->s_lvid_bh) { |
4b11111a MS |
1764 | struct logicalVolIntegrityDescImpUse *lvidiu = |
1765 | udf_sb_lvidiu(sbi); | |
6c79e987 MS |
1766 | uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); |
1767 | uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
4b11111a MS |
1768 | /* uint16_t maxUDFWriteRev = |
1769 | le16_to_cpu(lvidiu->maxUDFWriteRev); */ | |
1da177e4 | 1770 | |
cb00ea35 | 1771 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
4b11111a MS |
1772 | printk(KERN_ERR "UDF-fs: minUDFReadRev=%x " |
1773 | "(max is %x)\n", | |
6c79e987 | 1774 | le16_to_cpu(lvidiu->minUDFReadRev), |
cb00ea35 | 1775 | UDF_MAX_READ_VERSION); |
1da177e4 | 1776 | goto error_out; |
4b11111a | 1777 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) |
1da177e4 | 1778 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 1779 | |
6c79e987 | 1780 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
1781 | |
1782 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
1783 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
1784 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
1785 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
1786 | } | |
1787 | ||
6c79e987 | 1788 | if (!sbi->s_partitions) { |
3a71fc5d | 1789 | printk(KERN_WARNING "UDF-fs: No partition found (2)\n"); |
1da177e4 LT |
1790 | goto error_out; |
1791 | } | |
1792 | ||
4b11111a MS |
1793 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
1794 | UDF_PART_FLAG_READ_ONLY) { | |
1795 | printk(KERN_NOTICE "UDF-fs: Partition marked readonly; " | |
1796 | "forcing readonly mount\n"); | |
39b3f6d6 | 1797 | sb->s_flags |= MS_RDONLY; |
c1a26e7d | 1798 | } |
39b3f6d6 | 1799 | |
cb00ea35 | 1800 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
3a71fc5d | 1801 | printk(KERN_WARNING "UDF-fs: No fileset found\n"); |
1da177e4 LT |
1802 | goto error_out; |
1803 | } | |
1804 | ||
cb00ea35 | 1805 | if (!silent) { |
1da177e4 | 1806 | kernel_timestamp ts; |
6c79e987 | 1807 | udf_time_to_stamp(&ts, sbi->s_record_time); |
a9ca6635 | 1808 | udf_info("UDF: Mounting volume '%s', " |
28de7948 | 1809 | "timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
6c79e987 MS |
1810 | sbi->s_volume_ident, ts.year, ts.month, ts.day, |
1811 | ts.hour, ts.minute, ts.typeAndTimezone); | |
1da177e4 LT |
1812 | } |
1813 | if (!(sb->s_flags & MS_RDONLY)) | |
1814 | udf_open_lvid(sb); | |
1815 | ||
1816 | /* Assign the root inode */ | |
1817 | /* assign inodes by physical block number */ | |
1818 | /* perhaps it's not extensible enough, but for now ... */ | |
cb00ea35 CG |
1819 | inode = udf_iget(sb, rootdir); |
1820 | if (!inode) { | |
4b11111a MS |
1821 | printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, " |
1822 | "partition=%d\n", | |
cb00ea35 | 1823 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
1da177e4 LT |
1824 | goto error_out; |
1825 | } | |
1826 | ||
1827 | /* Allocate a dentry for the root inode */ | |
1828 | sb->s_root = d_alloc_root(inode); | |
cb00ea35 | 1829 | if (!sb->s_root) { |
3a71fc5d | 1830 | printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n"); |
1da177e4 LT |
1831 | iput(inode); |
1832 | goto error_out; | |
1833 | } | |
31170b6a | 1834 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
1da177e4 LT |
1835 | return 0; |
1836 | ||
28de7948 | 1837 | error_out: |
6c79e987 MS |
1838 | if (sbi->s_vat_inode) |
1839 | iput(sbi->s_vat_inode); | |
1840 | if (sbi->s_partitions) { | |
1841 | struct udf_part_map *map = &sbi->s_partmaps[sbi->s_partition]; | |
1842 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
1843 | iput(map->s_uspace.s_table); | |
1844 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
1845 | iput(map->s_fspace.s_table); | |
1846 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
66e1da3f | 1847 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); |
6c79e987 | 1848 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) |
66e1da3f | 1849 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); |
6c79e987 | 1850 | if (map->s_partition_type == UDF_SPARABLE_MAP15) |
cb00ea35 | 1851 | for (i = 0; i < 4; i++) |
4b11111a MS |
1852 | brelse(map->s_type_specific.s_sparing. |
1853 | s_spar_map[i]); | |
1da177e4 LT |
1854 | } |
1855 | #ifdef CONFIG_UDF_NLS | |
1856 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 1857 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
1858 | #endif |
1859 | if (!(sb->s_flags & MS_RDONLY)) | |
1860 | udf_close_lvid(sb); | |
6c79e987 MS |
1861 | brelse(sbi->s_lvid_bh); |
1862 | ||
1863 | kfree(sbi->s_partmaps); | |
1da177e4 LT |
1864 | kfree(sbi); |
1865 | sb->s_fs_info = NULL; | |
28de7948 | 1866 | |
1da177e4 LT |
1867 | return -EINVAL; |
1868 | } | |
1869 | ||
1870 | void udf_error(struct super_block *sb, const char *function, | |
cb00ea35 | 1871 | const char *fmt, ...) |
1da177e4 LT |
1872 | { |
1873 | va_list args; | |
1874 | ||
cb00ea35 | 1875 | if (!(sb->s_flags & MS_RDONLY)) { |
1da177e4 LT |
1876 | /* mark sb error */ |
1877 | sb->s_dirt = 1; | |
1878 | } | |
1879 | va_start(args, fmt); | |
4a6e617a | 1880 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 | 1881 | va_end(args); |
3a71fc5d | 1882 | printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n", |
28de7948 | 1883 | sb->s_id, function, error_buf); |
1da177e4 LT |
1884 | } |
1885 | ||
1886 | void udf_warning(struct super_block *sb, const char *function, | |
cb00ea35 | 1887 | const char *fmt, ...) |
1da177e4 LT |
1888 | { |
1889 | va_list args; | |
1890 | ||
cb00ea35 | 1891 | va_start(args, fmt); |
4a6e617a | 1892 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 LT |
1893 | va_end(args); |
1894 | printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n", | |
cb00ea35 | 1895 | sb->s_id, function, error_buf); |
1da177e4 LT |
1896 | } |
1897 | ||
cb00ea35 | 1898 | static void udf_put_super(struct super_block *sb) |
1da177e4 LT |
1899 | { |
1900 | int i; | |
6c79e987 | 1901 | struct udf_sb_info *sbi; |
1da177e4 | 1902 | |
6c79e987 MS |
1903 | sbi = UDF_SB(sb); |
1904 | if (sbi->s_vat_inode) | |
1905 | iput(sbi->s_vat_inode); | |
1906 | if (sbi->s_partitions) { | |
1907 | struct udf_part_map *map = &sbi->s_partmaps[sbi->s_partition]; | |
1908 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
1909 | iput(map->s_uspace.s_table); | |
1910 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
1911 | iput(map->s_fspace.s_table); | |
1912 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
66e1da3f | 1913 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); |
6c79e987 | 1914 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) |
66e1da3f | 1915 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); |
6c79e987 | 1916 | if (map->s_partition_type == UDF_SPARABLE_MAP15) |
cb00ea35 | 1917 | for (i = 0; i < 4; i++) |
4b11111a MS |
1918 | brelse(map->s_type_specific.s_sparing. |
1919 | s_spar_map[i]); | |
1da177e4 LT |
1920 | } |
1921 | #ifdef CONFIG_UDF_NLS | |
1922 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 1923 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
1924 | #endif |
1925 | if (!(sb->s_flags & MS_RDONLY)) | |
1926 | udf_close_lvid(sb); | |
6c79e987 MS |
1927 | brelse(sbi->s_lvid_bh); |
1928 | kfree(sbi->s_partmaps); | |
1da177e4 LT |
1929 | kfree(sb->s_fs_info); |
1930 | sb->s_fs_info = NULL; | |
1931 | } | |
1932 | ||
cb00ea35 | 1933 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 1934 | { |
726c3342 | 1935 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
1936 | struct udf_sb_info *sbi = UDF_SB(sb); |
1937 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
1938 | ||
1939 | if (sbi->s_lvid_bh != NULL) | |
1940 | lvidiu = udf_sb_lvidiu(sbi); | |
1941 | else | |
1942 | lvidiu = NULL; | |
726c3342 | 1943 | |
1da177e4 LT |
1944 | buf->f_type = UDF_SUPER_MAGIC; |
1945 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 1946 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
1947 | buf->f_bfree = udf_count_free(sb); |
1948 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
1949 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
1950 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
1951 | + buf->f_bfree; | |
1da177e4 LT |
1952 | buf->f_ffree = buf->f_bfree; |
1953 | /* __kernel_fsid_t f_fsid */ | |
cb00ea35 | 1954 | buf->f_namelen = UDF_NAME_LEN - 2; |
1da177e4 LT |
1955 | |
1956 | return 0; | |
1957 | } | |
1958 | ||
1959 | static unsigned char udf_bitmap_lookup[16] = { | |
1960 | 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4 | |
1961 | }; | |
1962 | ||
4b11111a MS |
1963 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
1964 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
1965 | { |
1966 | struct buffer_head *bh = NULL; | |
1967 | unsigned int accum = 0; | |
1968 | int index; | |
1969 | int block = 0, newblock; | |
1970 | kernel_lb_addr loc; | |
1971 | uint32_t bytes; | |
1972 | uint8_t value; | |
1973 | uint8_t *ptr; | |
1974 | uint16_t ident; | |
1975 | struct spaceBitmapDesc *bm; | |
1976 | ||
1977 | lock_kernel(); | |
1978 | ||
1979 | loc.logicalBlockNum = bitmap->s_extPosition; | |
6c79e987 | 1980 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
1da177e4 LT |
1981 | bh = udf_read_ptagged(sb, loc, 0, &ident); |
1982 | ||
cb00ea35 | 1983 | if (!bh) { |
1da177e4 LT |
1984 | printk(KERN_ERR "udf: udf_count_free failed\n"); |
1985 | goto out; | |
cb00ea35 | 1986 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 1987 | brelse(bh); |
1da177e4 LT |
1988 | printk(KERN_ERR "udf: udf_count_free failed\n"); |
1989 | goto out; | |
1990 | } | |
1991 | ||
1992 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
1993 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
1994 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
1995 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 1996 | |
cb00ea35 CG |
1997 | while (bytes > 0) { |
1998 | while ((bytes > 0) && (index < sb->s_blocksize)) { | |
1da177e4 | 1999 | value = ptr[index]; |
cb00ea35 CG |
2000 | accum += udf_bitmap_lookup[value & 0x0f]; |
2001 | accum += udf_bitmap_lookup[value >> 4]; | |
1da177e4 LT |
2002 | index++; |
2003 | bytes--; | |
2004 | } | |
cb00ea35 | 2005 | if (bytes) { |
3bf25cb4 | 2006 | brelse(bh); |
1da177e4 LT |
2007 | newblock = udf_get_lb_pblock(sb, loc, ++block); |
2008 | bh = udf_tread(sb, newblock); | |
cb00ea35 | 2009 | if (!bh) { |
1da177e4 LT |
2010 | udf_debug("read failed\n"); |
2011 | goto out; | |
2012 | } | |
2013 | index = 0; | |
28de7948 | 2014 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2015 | } |
2016 | } | |
3bf25cb4 | 2017 | brelse(bh); |
1da177e4 | 2018 | |
28de7948 | 2019 | out: |
1da177e4 LT |
2020 | unlock_kernel(); |
2021 | ||
2022 | return accum; | |
2023 | } | |
2024 | ||
4b11111a MS |
2025 | static unsigned int udf_count_free_table(struct super_block *sb, |
2026 | struct inode *table) | |
1da177e4 LT |
2027 | { |
2028 | unsigned int accum = 0; | |
ff116fc8 JK |
2029 | uint32_t elen; |
2030 | kernel_lb_addr eloc; | |
1da177e4 | 2031 | int8_t etype; |
ff116fc8 | 2032 | struct extent_position epos; |
1da177e4 LT |
2033 | |
2034 | lock_kernel(); | |
2035 | ||
c0b34438 | 2036 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2037 | epos.offset = sizeof(struct unallocSpaceEntry); |
2038 | epos.bh = NULL; | |
1da177e4 | 2039 | |
3a71fc5d | 2040 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2041 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2042 | |
3bf25cb4 | 2043 | brelse(epos.bh); |
1da177e4 LT |
2044 | |
2045 | unlock_kernel(); | |
2046 | ||
2047 | return accum; | |
2048 | } | |
cb00ea35 CG |
2049 | |
2050 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2051 | { |
2052 | unsigned int accum = 0; | |
6c79e987 MS |
2053 | struct udf_sb_info *sbi; |
2054 | struct udf_part_map *map; | |
1da177e4 | 2055 | |
6c79e987 MS |
2056 | sbi = UDF_SB(sb); |
2057 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2058 | struct logicalVolIntegrityDesc *lvid = |
2059 | (struct logicalVolIntegrityDesc *) | |
2060 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2061 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2062 | accum = le32_to_cpu( |
2063 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2064 | if (accum == 0xFFFFFFFF) |
2065 | accum = 0; | |
2066 | } | |
2067 | } | |
2068 | ||
2069 | if (accum) | |
2070 | return accum; | |
2071 | ||
6c79e987 MS |
2072 | map = &sbi->s_partmaps[sbi->s_partition]; |
2073 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2074 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2075 | map->s_uspace.s_bitmap); |
1da177e4 | 2076 | } |
6c79e987 | 2077 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
28de7948 | 2078 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2079 | map->s_fspace.s_bitmap); |
1da177e4 LT |
2080 | } |
2081 | if (accum) | |
2082 | return accum; | |
2083 | ||
6c79e987 | 2084 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2085 | accum += udf_count_free_table(sb, |
6c79e987 | 2086 | map->s_uspace.s_table); |
1da177e4 | 2087 | } |
6c79e987 | 2088 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
28de7948 | 2089 | accum += udf_count_free_table(sb, |
6c79e987 | 2090 | map->s_fspace.s_table); |
1da177e4 LT |
2091 | } |
2092 | ||
2093 | return accum; | |
2094 | } |