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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> | |
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 *); | |
1da177e4 LT |
88 | static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad); |
89 | static void udf_find_anchor(struct super_block *); | |
cb00ea35 CG |
90 | static int udf_find_fileset(struct super_block *, kernel_lb_addr *, |
91 | kernel_lb_addr *); | |
cb00ea35 CG |
92 | static void udf_load_fileset(struct super_block *, struct buffer_head *, |
93 | kernel_lb_addr *); | |
1da177e4 LT |
94 | static void udf_open_lvid(struct super_block *); |
95 | static void udf_close_lvid(struct super_block *); | |
96 | static unsigned int udf_count_free(struct super_block *); | |
726c3342 | 97 | static int udf_statfs(struct dentry *, struct kstatfs *); |
6da80894 | 98 | static int udf_show_options(struct seq_file *, struct vfsmount *); |
b8145a76 AB |
99 | static void udf_error(struct super_block *sb, const char *function, |
100 | const char *fmt, ...); | |
1da177e4 | 101 | |
6c79e987 MS |
102 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) |
103 | { | |
4b11111a MS |
104 | struct logicalVolIntegrityDesc *lvid = |
105 | (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; | |
6c79e987 | 106 | __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); |
4b11111a MS |
107 | __u32 offset = number_of_partitions * 2 * |
108 | sizeof(uint32_t)/sizeof(uint8_t); | |
6c79e987 MS |
109 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
110 | } | |
111 | ||
1da177e4 | 112 | /* UDF filesystem type */ |
454e2398 | 113 | static int udf_get_sb(struct file_system_type *fs_type, |
cb00ea35 CG |
114 | int flags, const char *dev_name, void *data, |
115 | struct vfsmount *mnt) | |
1da177e4 | 116 | { |
454e2398 | 117 | return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt); |
1da177e4 LT |
118 | } |
119 | ||
120 | static struct file_system_type udf_fstype = { | |
28de7948 CG |
121 | .owner = THIS_MODULE, |
122 | .name = "udf", | |
123 | .get_sb = udf_get_sb, | |
124 | .kill_sb = kill_block_super, | |
125 | .fs_flags = FS_REQUIRES_DEV, | |
1da177e4 LT |
126 | }; |
127 | ||
cb00ea35 | 128 | static struct kmem_cache *udf_inode_cachep; |
1da177e4 LT |
129 | |
130 | static struct inode *udf_alloc_inode(struct super_block *sb) | |
131 | { | |
132 | struct udf_inode_info *ei; | |
3a71fc5d | 133 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
134 | if (!ei) |
135 | return NULL; | |
95f8797f DB |
136 | |
137 | ei->i_unique = 0; | |
138 | ei->i_lenExtents = 0; | |
139 | ei->i_next_alloc_block = 0; | |
140 | ei->i_next_alloc_goal = 0; | |
141 | ei->i_strat4096 = 0; | |
142 | ||
1da177e4 LT |
143 | return &ei->vfs_inode; |
144 | } | |
145 | ||
146 | static void udf_destroy_inode(struct inode *inode) | |
147 | { | |
148 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); | |
149 | } | |
150 | ||
4ba9b9d0 | 151 | static void init_once(struct kmem_cache *cachep, void *foo) |
1da177e4 | 152 | { |
cb00ea35 | 153 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
1da177e4 | 154 | |
a35afb83 CL |
155 | ei->i_ext.i_data = NULL; |
156 | inode_init_once(&ei->vfs_inode); | |
1da177e4 LT |
157 | } |
158 | ||
159 | static int init_inodecache(void) | |
160 | { | |
161 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", | |
162 | sizeof(struct udf_inode_info), | |
cb00ea35 CG |
163 | 0, (SLAB_RECLAIM_ACCOUNT | |
164 | SLAB_MEM_SPREAD), | |
20c2df83 | 165 | init_once); |
28de7948 | 166 | if (!udf_inode_cachep) |
1da177e4 LT |
167 | return -ENOMEM; |
168 | return 0; | |
169 | } | |
170 | ||
171 | static void destroy_inodecache(void) | |
172 | { | |
1a1d92c1 | 173 | kmem_cache_destroy(udf_inode_cachep); |
1da177e4 LT |
174 | } |
175 | ||
176 | /* Superblock operations */ | |
ee9b6d61 | 177 | static const struct super_operations udf_sb_ops = { |
28de7948 CG |
178 | .alloc_inode = udf_alloc_inode, |
179 | .destroy_inode = udf_destroy_inode, | |
180 | .write_inode = udf_write_inode, | |
181 | .delete_inode = udf_delete_inode, | |
182 | .clear_inode = udf_clear_inode, | |
183 | .put_super = udf_put_super, | |
184 | .write_super = udf_write_super, | |
185 | .statfs = udf_statfs, | |
186 | .remount_fs = udf_remount_fs, | |
6da80894 | 187 | .show_options = udf_show_options, |
1da177e4 LT |
188 | }; |
189 | ||
cb00ea35 | 190 | struct udf_options { |
1da177e4 LT |
191 | unsigned char novrs; |
192 | unsigned int blocksize; | |
193 | unsigned int session; | |
194 | unsigned int lastblock; | |
195 | unsigned int anchor; | |
196 | unsigned int volume; | |
197 | unsigned short partition; | |
198 | unsigned int fileset; | |
199 | unsigned int rootdir; | |
200 | unsigned int flags; | |
201 | mode_t umask; | |
202 | gid_t gid; | |
203 | uid_t uid; | |
204 | struct nls_table *nls_map; | |
205 | }; | |
206 | ||
207 | static int __init init_udf_fs(void) | |
208 | { | |
209 | int err; | |
28de7948 | 210 | |
1da177e4 LT |
211 | err = init_inodecache(); |
212 | if (err) | |
213 | goto out1; | |
214 | err = register_filesystem(&udf_fstype); | |
215 | if (err) | |
216 | goto out; | |
28de7948 | 217 | |
1da177e4 | 218 | return 0; |
28de7948 CG |
219 | |
220 | out: | |
1da177e4 | 221 | destroy_inodecache(); |
28de7948 CG |
222 | |
223 | out1: | |
1da177e4 LT |
224 | return err; |
225 | } | |
226 | ||
227 | static void __exit exit_udf_fs(void) | |
228 | { | |
229 | unregister_filesystem(&udf_fstype); | |
230 | destroy_inodecache(); | |
231 | } | |
232 | ||
233 | module_init(init_udf_fs) | |
28de7948 | 234 | module_exit(exit_udf_fs) |
1da177e4 | 235 | |
dc5d39be MS |
236 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
237 | { | |
238 | struct udf_sb_info *sbi = UDF_SB(sb); | |
239 | ||
240 | sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), | |
241 | GFP_KERNEL); | |
242 | if (!sbi->s_partmaps) { | |
243 | udf_error(sb, __FUNCTION__, | |
244 | "Unable to allocate space for %d partition maps", | |
245 | count); | |
246 | sbi->s_partitions = 0; | |
247 | return -ENOMEM; | |
248 | } | |
249 | ||
250 | sbi->s_partitions = count; | |
251 | return 0; | |
252 | } | |
253 | ||
6da80894 MS |
254 | static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt) |
255 | { | |
256 | struct super_block *sb = mnt->mnt_sb; | |
257 | struct udf_sb_info *sbi = UDF_SB(sb); | |
258 | ||
259 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) | |
260 | seq_puts(seq, ",nostrict"); | |
261 | if (sb->s_blocksize != UDF_DEFAULT_BLOCKSIZE) | |
262 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); | |
263 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) | |
264 | seq_puts(seq, ",unhide"); | |
265 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) | |
266 | seq_puts(seq, ",undelete"); | |
267 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) | |
268 | seq_puts(seq, ",noadinicb"); | |
269 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) | |
270 | seq_puts(seq, ",shortad"); | |
271 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) | |
272 | seq_puts(seq, ",uid=forget"); | |
273 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) | |
274 | seq_puts(seq, ",uid=ignore"); | |
275 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) | |
276 | seq_puts(seq, ",gid=forget"); | |
277 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) | |
278 | seq_puts(seq, ",gid=ignore"); | |
279 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) | |
280 | seq_printf(seq, ",uid=%u", sbi->s_uid); | |
281 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) | |
282 | seq_printf(seq, ",gid=%u", sbi->s_gid); | |
283 | if (sbi->s_umask != 0) | |
284 | seq_printf(seq, ",umask=%o", sbi->s_umask); | |
285 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) | |
286 | seq_printf(seq, ",session=%u", sbi->s_session); | |
287 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) | |
288 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); | |
289 | /* | |
290 | * s_anchor[2] could be zeroed out in case there is no anchor | |
291 | * in the specified block, but then the "anchor=N" option | |
292 | * originally given by the user wasn't effective, so it's OK | |
293 | * if we don't show it. | |
294 | */ | |
295 | if (sbi->s_anchor[2] != 0) | |
296 | seq_printf(seq, ",anchor=%u", sbi->s_anchor[2]); | |
297 | /* | |
298 | * volume, partition, fileset and rootdir seem to be ignored | |
299 | * currently | |
300 | */ | |
301 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) | |
302 | seq_puts(seq, ",utf8"); | |
303 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) | |
304 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
1da177e4 LT |
309 | /* |
310 | * udf_parse_options | |
311 | * | |
312 | * PURPOSE | |
313 | * Parse mount options. | |
314 | * | |
315 | * DESCRIPTION | |
316 | * The following mount options are supported: | |
317 | * | |
318 | * gid= Set the default group. | |
319 | * umask= Set the default umask. | |
320 | * uid= Set the default user. | |
321 | * bs= Set the block size. | |
322 | * unhide Show otherwise hidden files. | |
323 | * undelete Show deleted files in lists. | |
324 | * adinicb Embed data in the inode (default) | |
325 | * noadinicb Don't embed data in the inode | |
326 | * shortad Use short ad's | |
327 | * longad Use long ad's (default) | |
328 | * nostrict Unset strict conformance | |
329 | * iocharset= Set the NLS character set | |
330 | * | |
331 | * The remaining are for debugging and disaster recovery: | |
332 | * | |
28de7948 | 333 | * novrs Skip volume sequence recognition |
1da177e4 LT |
334 | * |
335 | * The following expect a offset from 0. | |
336 | * | |
337 | * session= Set the CDROM session (default= last session) | |
338 | * anchor= Override standard anchor location. (default= 256) | |
339 | * volume= Override the VolumeDesc location. (unused) | |
340 | * partition= Override the PartitionDesc location. (unused) | |
341 | * lastblock= Set the last block of the filesystem/ | |
342 | * | |
343 | * The following expect a offset from the partition root. | |
344 | * | |
345 | * fileset= Override the fileset block location. (unused) | |
346 | * rootdir= Override the root directory location. (unused) | |
347 | * WARNING: overriding the rootdir to a non-directory may | |
348 | * yield highly unpredictable results. | |
349 | * | |
350 | * PRE-CONDITIONS | |
351 | * options Pointer to mount options string. | |
352 | * uopts Pointer to mount options variable. | |
353 | * | |
354 | * POST-CONDITIONS | |
355 | * <return> 1 Mount options parsed okay. | |
356 | * <return> 0 Error parsing mount options. | |
357 | * | |
358 | * HISTORY | |
359 | * July 1, 1997 - Andrew E. Mileski | |
360 | * Written, tested, and released. | |
361 | */ | |
28de7948 | 362 | |
1da177e4 LT |
363 | enum { |
364 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, | |
365 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, | |
366 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, | |
367 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, | |
368 | Opt_rootdir, Opt_utf8, Opt_iocharset, | |
4d6660eb | 369 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore |
1da177e4 LT |
370 | }; |
371 | ||
372 | static match_table_t tokens = { | |
28de7948 CG |
373 | {Opt_novrs, "novrs"}, |
374 | {Opt_nostrict, "nostrict"}, | |
375 | {Opt_bs, "bs=%u"}, | |
376 | {Opt_unhide, "unhide"}, | |
377 | {Opt_undelete, "undelete"}, | |
378 | {Opt_noadinicb, "noadinicb"}, | |
379 | {Opt_adinicb, "adinicb"}, | |
380 | {Opt_shortad, "shortad"}, | |
381 | {Opt_longad, "longad"}, | |
382 | {Opt_uforget, "uid=forget"}, | |
383 | {Opt_uignore, "uid=ignore"}, | |
384 | {Opt_gforget, "gid=forget"}, | |
385 | {Opt_gignore, "gid=ignore"}, | |
386 | {Opt_gid, "gid=%u"}, | |
387 | {Opt_uid, "uid=%u"}, | |
388 | {Opt_umask, "umask=%o"}, | |
389 | {Opt_session, "session=%u"}, | |
390 | {Opt_lastblock, "lastblock=%u"}, | |
391 | {Opt_anchor, "anchor=%u"}, | |
392 | {Opt_volume, "volume=%u"}, | |
393 | {Opt_partition, "partition=%u"}, | |
394 | {Opt_fileset, "fileset=%u"}, | |
395 | {Opt_rootdir, "rootdir=%u"}, | |
396 | {Opt_utf8, "utf8"}, | |
397 | {Opt_iocharset, "iocharset=%s"}, | |
398 | {Opt_err, NULL} | |
1da177e4 LT |
399 | }; |
400 | ||
6da80894 MS |
401 | static int udf_parse_options(char *options, struct udf_options *uopt, |
402 | bool remount) | |
1da177e4 LT |
403 | { |
404 | char *p; | |
405 | int option; | |
406 | ||
407 | uopt->novrs = 0; | |
6da80894 | 408 | uopt->blocksize = UDF_DEFAULT_BLOCKSIZE; |
1da177e4 LT |
409 | uopt->partition = 0xFFFF; |
410 | uopt->session = 0xFFFFFFFF; | |
411 | uopt->lastblock = 0; | |
412 | uopt->anchor = 0; | |
413 | uopt->volume = 0xFFFFFFFF; | |
414 | uopt->rootdir = 0xFFFFFFFF; | |
415 | uopt->fileset = 0xFFFFFFFF; | |
416 | uopt->nls_map = NULL; | |
417 | ||
418 | if (!options) | |
419 | return 1; | |
420 | ||
cb00ea35 | 421 | while ((p = strsep(&options, ",")) != NULL) { |
1da177e4 LT |
422 | substring_t args[MAX_OPT_ARGS]; |
423 | int token; | |
424 | if (!*p) | |
425 | continue; | |
426 | ||
427 | token = match_token(p, tokens, args); | |
cb00ea35 CG |
428 | switch (token) { |
429 | case Opt_novrs: | |
430 | uopt->novrs = 1; | |
431 | case Opt_bs: | |
432 | if (match_int(&args[0], &option)) | |
433 | return 0; | |
434 | uopt->blocksize = option; | |
435 | break; | |
436 | case Opt_unhide: | |
437 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); | |
438 | break; | |
439 | case Opt_undelete: | |
440 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); | |
441 | break; | |
442 | case Opt_noadinicb: | |
443 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); | |
444 | break; | |
445 | case Opt_adinicb: | |
446 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); | |
447 | break; | |
448 | case Opt_shortad: | |
449 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); | |
450 | break; | |
451 | case Opt_longad: | |
452 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); | |
453 | break; | |
454 | case Opt_gid: | |
455 | if (match_int(args, &option)) | |
456 | return 0; | |
457 | uopt->gid = option; | |
ca76d2d8 | 458 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
cb00ea35 CG |
459 | break; |
460 | case Opt_uid: | |
461 | if (match_int(args, &option)) | |
462 | return 0; | |
463 | uopt->uid = option; | |
ca76d2d8 | 464 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
cb00ea35 CG |
465 | break; |
466 | case Opt_umask: | |
467 | if (match_octal(args, &option)) | |
468 | return 0; | |
469 | uopt->umask = option; | |
470 | break; | |
471 | case Opt_nostrict: | |
472 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); | |
473 | break; | |
474 | case Opt_session: | |
475 | if (match_int(args, &option)) | |
476 | return 0; | |
477 | uopt->session = option; | |
6da80894 MS |
478 | if (!remount) |
479 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); | |
cb00ea35 CG |
480 | break; |
481 | case Opt_lastblock: | |
482 | if (match_int(args, &option)) | |
483 | return 0; | |
484 | uopt->lastblock = option; | |
6da80894 MS |
485 | if (!remount) |
486 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); | |
cb00ea35 CG |
487 | break; |
488 | case Opt_anchor: | |
489 | if (match_int(args, &option)) | |
490 | return 0; | |
491 | uopt->anchor = option; | |
492 | break; | |
493 | case Opt_volume: | |
494 | if (match_int(args, &option)) | |
495 | return 0; | |
496 | uopt->volume = option; | |
497 | break; | |
498 | case Opt_partition: | |
499 | if (match_int(args, &option)) | |
500 | return 0; | |
501 | uopt->partition = option; | |
502 | break; | |
503 | case Opt_fileset: | |
504 | if (match_int(args, &option)) | |
505 | return 0; | |
506 | uopt->fileset = option; | |
507 | break; | |
508 | case Opt_rootdir: | |
509 | if (match_int(args, &option)) | |
510 | return 0; | |
511 | uopt->rootdir = option; | |
512 | break; | |
513 | case Opt_utf8: | |
514 | uopt->flags |= (1 << UDF_FLAG_UTF8); | |
515 | break; | |
1da177e4 | 516 | #ifdef CONFIG_UDF_NLS |
cb00ea35 CG |
517 | case Opt_iocharset: |
518 | uopt->nls_map = load_nls(args[0].from); | |
519 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); | |
520 | break; | |
1da177e4 | 521 | #endif |
cb00ea35 CG |
522 | case Opt_uignore: |
523 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); | |
524 | break; | |
525 | case Opt_uforget: | |
526 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); | |
527 | break; | |
528 | case Opt_gignore: | |
529 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); | |
530 | break; | |
531 | case Opt_gforget: | |
532 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); | |
533 | break; | |
534 | default: | |
535 | printk(KERN_ERR "udf: bad mount option \"%s\" " | |
536 | "or missing value\n", p); | |
1da177e4 LT |
537 | return 0; |
538 | } | |
539 | } | |
540 | return 1; | |
541 | } | |
542 | ||
bd45a420 | 543 | static void udf_write_super(struct super_block *sb) |
1da177e4 LT |
544 | { |
545 | lock_kernel(); | |
28de7948 | 546 | |
1da177e4 LT |
547 | if (!(sb->s_flags & MS_RDONLY)) |
548 | udf_open_lvid(sb); | |
549 | sb->s_dirt = 0; | |
28de7948 | 550 | |
1da177e4 LT |
551 | unlock_kernel(); |
552 | } | |
553 | ||
cb00ea35 | 554 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
1da177e4 LT |
555 | { |
556 | struct udf_options uopt; | |
6c79e987 | 557 | struct udf_sb_info *sbi = UDF_SB(sb); |
1da177e4 | 558 | |
6c79e987 MS |
559 | uopt.flags = sbi->s_flags; |
560 | uopt.uid = sbi->s_uid; | |
561 | uopt.gid = sbi->s_gid; | |
562 | uopt.umask = sbi->s_umask; | |
1da177e4 | 563 | |
6da80894 | 564 | if (!udf_parse_options(options, &uopt, true)) |
1da177e4 LT |
565 | return -EINVAL; |
566 | ||
6c79e987 MS |
567 | sbi->s_flags = uopt.flags; |
568 | sbi->s_uid = uopt.uid; | |
569 | sbi->s_gid = uopt.gid; | |
570 | sbi->s_umask = uopt.umask; | |
1da177e4 | 571 | |
6c79e987 MS |
572 | if (sbi->s_lvid_bh) { |
573 | int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); | |
1da177e4 LT |
574 | if (write_rev > UDF_MAX_WRITE_VERSION) |
575 | *flags |= MS_RDONLY; | |
576 | } | |
577 | ||
578 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) | |
579 | return 0; | |
580 | if (*flags & MS_RDONLY) | |
581 | udf_close_lvid(sb); | |
582 | else | |
583 | udf_open_lvid(sb); | |
584 | ||
585 | return 0; | |
586 | } | |
587 | ||
cb00ea35 | 588 | static int udf_vrs(struct super_block *sb, int silent) |
1da177e4 LT |
589 | { |
590 | struct volStructDesc *vsd = NULL; | |
591 | int sector = 32768; | |
592 | int sectorsize; | |
593 | struct buffer_head *bh = NULL; | |
cb00ea35 CG |
594 | int iso9660 = 0; |
595 | int nsr02 = 0; | |
596 | int nsr03 = 0; | |
6c79e987 | 597 | struct udf_sb_info *sbi; |
1da177e4 LT |
598 | |
599 | /* Block size must be a multiple of 512 */ | |
600 | if (sb->s_blocksize & 511) | |
601 | return 0; | |
6c79e987 | 602 | sbi = UDF_SB(sb); |
1da177e4 LT |
603 | |
604 | if (sb->s_blocksize < sizeof(struct volStructDesc)) | |
605 | sectorsize = sizeof(struct volStructDesc); | |
606 | else | |
607 | sectorsize = sb->s_blocksize; | |
608 | ||
6c79e987 | 609 | sector += (sbi->s_session << sb->s_blocksize_bits); |
1da177e4 LT |
610 | |
611 | udf_debug("Starting at sector %u (%ld byte sectors)\n", | |
cb00ea35 | 612 | (sector >> sb->s_blocksize_bits), sb->s_blocksize); |
1da177e4 | 613 | /* Process the sequence (if applicable) */ |
cb00ea35 | 614 | for (; !nsr02 && !nsr03; sector += sectorsize) { |
1da177e4 LT |
615 | /* Read a block */ |
616 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); | |
617 | if (!bh) | |
618 | break; | |
619 | ||
620 | /* Look for ISO descriptors */ | |
621 | vsd = (struct volStructDesc *)(bh->b_data + | |
3a71fc5d | 622 | (sector & (sb->s_blocksize - 1))); |
1da177e4 | 623 | |
cb00ea35 | 624 | if (vsd->stdIdent[0] == 0) { |
3bf25cb4 | 625 | brelse(bh); |
1da177e4 | 626 | break; |
3a71fc5d MS |
627 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
628 | VSD_STD_ID_LEN)) { | |
1da177e4 | 629 | iso9660 = sector; |
cb00ea35 CG |
630 | switch (vsd->structType) { |
631 | case 0: | |
632 | udf_debug("ISO9660 Boot Record found\n"); | |
633 | break; | |
634 | case 1: | |
3a71fc5d MS |
635 | udf_debug("ISO9660 Primary Volume Descriptor " |
636 | "found\n"); | |
cb00ea35 CG |
637 | break; |
638 | case 2: | |
3a71fc5d MS |
639 | udf_debug("ISO9660 Supplementary Volume " |
640 | "Descriptor found\n"); | |
cb00ea35 CG |
641 | break; |
642 | case 3: | |
3a71fc5d MS |
643 | udf_debug("ISO9660 Volume Partition Descriptor " |
644 | "found\n"); | |
cb00ea35 CG |
645 | break; |
646 | case 255: | |
3a71fc5d MS |
647 | udf_debug("ISO9660 Volume Descriptor Set " |
648 | "Terminator found\n"); | |
cb00ea35 CG |
649 | break; |
650 | default: | |
651 | udf_debug("ISO9660 VRS (%u) found\n", | |
652 | vsd->structType); | |
653 | break; | |
1da177e4 | 654 | } |
3a71fc5d MS |
655 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
656 | VSD_STD_ID_LEN)) | |
657 | ; /* nothing */ | |
658 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, | |
659 | VSD_STD_ID_LEN)) { | |
3bf25cb4 | 660 | brelse(bh); |
1da177e4 | 661 | break; |
3a71fc5d MS |
662 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
663 | VSD_STD_ID_LEN)) | |
1da177e4 | 664 | nsr02 = sector; |
3a71fc5d MS |
665 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
666 | VSD_STD_ID_LEN)) | |
1da177e4 | 667 | nsr03 = sector; |
3bf25cb4 | 668 | brelse(bh); |
1da177e4 LT |
669 | } |
670 | ||
671 | if (nsr03) | |
672 | return nsr03; | |
673 | else if (nsr02) | |
674 | return nsr02; | |
6c79e987 | 675 | else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) |
1da177e4 LT |
676 | return -1; |
677 | else | |
678 | return 0; | |
679 | } | |
680 | ||
681 | /* | |
682 | * udf_find_anchor | |
683 | * | |
684 | * PURPOSE | |
685 | * Find an anchor volume descriptor. | |
686 | * | |
687 | * PRE-CONDITIONS | |
688 | * sb Pointer to _locked_ superblock. | |
689 | * lastblock Last block on media. | |
690 | * | |
691 | * POST-CONDITIONS | |
692 | * <return> 1 if not found, 0 if ok | |
693 | * | |
694 | * HISTORY | |
695 | * July 1, 1997 - Andrew E. Mileski | |
696 | * Written, tested, and released. | |
697 | */ | |
cb00ea35 | 698 | static void udf_find_anchor(struct super_block *sb) |
1da177e4 | 699 | { |
6c79e987 | 700 | int lastblock; |
1da177e4 LT |
701 | struct buffer_head *bh = NULL; |
702 | uint16_t ident; | |
703 | uint32_t location; | |
704 | int i; | |
6c79e987 MS |
705 | struct udf_sb_info *sbi; |
706 | ||
707 | sbi = UDF_SB(sb); | |
708 | lastblock = sbi->s_last_block; | |
1da177e4 | 709 | |
cb00ea35 | 710 | if (lastblock) { |
1da177e4 | 711 | int varlastblock = udf_variable_to_fixed(lastblock); |
28de7948 CG |
712 | int last[] = { lastblock, lastblock - 2, |
713 | lastblock - 150, lastblock - 152, | |
714 | varlastblock, varlastblock - 2, | |
715 | varlastblock - 150, varlastblock - 152 }; | |
1da177e4 LT |
716 | |
717 | lastblock = 0; | |
718 | ||
719 | /* Search for an anchor volume descriptor pointer */ | |
720 | ||
721 | /* according to spec, anchor is in either: | |
722 | * block 256 | |
723 | * lastblock-256 | |
724 | * lastblock | |
725 | * however, if the disc isn't closed, it could be 512 */ | |
726 | ||
e8c96f8c | 727 | for (i = 0; !lastblock && i < ARRAY_SIZE(last); i++) { |
3a71fc5d MS |
728 | ident = location = 0; |
729 | if (last[i] >= 0) { | |
730 | bh = sb_bread(sb, last[i]); | |
731 | if (bh) { | |
732 | tag *t = (tag *)bh->b_data; | |
733 | ident = le16_to_cpu(t->tagIdent); | |
734 | location = le32_to_cpu(t->tagLocation); | |
735 | brelse(bh); | |
736 | } | |
1da177e4 | 737 | } |
e8c96f8c | 738 | |
cb00ea35 | 739 | if (ident == TAG_IDENT_AVDP) { |
6c79e987 MS |
740 | if (location == last[i] - sbi->s_session) { |
741 | lastblock = last[i] - sbi->s_session; | |
742 | sbi->s_anchor[0] = lastblock; | |
743 | sbi->s_anchor[1] = lastblock - 256; | |
4b11111a MS |
744 | } else if (location == |
745 | udf_variable_to_fixed(last[i]) - | |
746 | sbi->s_session) { | |
1da177e4 | 747 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); |
4b11111a MS |
748 | lastblock = |
749 | udf_variable_to_fixed(last[i]) - | |
750 | sbi->s_session; | |
6c79e987 | 751 | sbi->s_anchor[0] = lastblock; |
4b11111a MS |
752 | sbi->s_anchor[1] = lastblock - 256 - |
753 | sbi->s_session; | |
28de7948 | 754 | } else { |
4b11111a MS |
755 | udf_debug("Anchor found at block %d, " |
756 | "location mismatch %d.\n", | |
28de7948 CG |
757 | last[i], location); |
758 | } | |
4b11111a MS |
759 | } else if (ident == TAG_IDENT_FE || |
760 | ident == TAG_IDENT_EFE) { | |
1da177e4 | 761 | lastblock = last[i]; |
6c79e987 | 762 | sbi->s_anchor[3] = 512; |
cb00ea35 | 763 | } else { |
3a71fc5d MS |
764 | ident = location = 0; |
765 | if (last[i] >= 256) { | |
766 | bh = sb_bread(sb, last[i] - 256); | |
767 | if (bh) { | |
768 | tag *t = (tag *)bh->b_data; | |
4b11111a MS |
769 | ident = le16_to_cpu( |
770 | t->tagIdent); | |
771 | location = le32_to_cpu( | |
772 | t->tagLocation); | |
3a71fc5d MS |
773 | brelse(bh); |
774 | } | |
1da177e4 | 775 | } |
cb00ea35 | 776 | |
1da177e4 | 777 | if (ident == TAG_IDENT_AVDP && |
4b11111a MS |
778 | location == last[i] - 256 - |
779 | sbi->s_session) { | |
1da177e4 | 780 | lastblock = last[i]; |
6c79e987 | 781 | sbi->s_anchor[1] = last[i] - 256; |
cb00ea35 | 782 | } else { |
3a71fc5d | 783 | ident = location = 0; |
6c79e987 | 784 | if (last[i] >= 312 + sbi->s_session) { |
4b11111a MS |
785 | bh = sb_bread(sb, |
786 | last[i] - 312 - | |
787 | sbi->s_session); | |
3a71fc5d | 788 | if (bh) { |
4b11111a MS |
789 | tag *t = (tag *) |
790 | bh->b_data; | |
791 | ident = le16_to_cpu( | |
792 | t->tagIdent); | |
793 | location = le32_to_cpu( | |
794 | t->tagLocation); | |
3a71fc5d MS |
795 | brelse(bh); |
796 | } | |
1da177e4 | 797 | } |
cb00ea35 | 798 | |
1da177e4 | 799 | if (ident == TAG_IDENT_AVDP && |
28de7948 | 800 | location == udf_variable_to_fixed(last[i]) - 256) { |
4b11111a MS |
801 | UDF_SET_FLAG(sb, |
802 | UDF_FLAG_VARCONV); | |
28de7948 | 803 | lastblock = udf_variable_to_fixed(last[i]); |
6c79e987 | 804 | sbi->s_anchor[1] = lastblock - 256; |
1da177e4 LT |
805 | } |
806 | } | |
807 | } | |
808 | } | |
809 | } | |
810 | ||
cb00ea35 | 811 | if (!lastblock) { |
3a71fc5d | 812 | /* We haven't found the lastblock. check 312 */ |
6c79e987 | 813 | bh = sb_bread(sb, 312 + sbi->s_session); |
3a71fc5d MS |
814 | if (bh) { |
815 | tag *t = (tag *)bh->b_data; | |
816 | ident = le16_to_cpu(t->tagIdent); | |
817 | location = le32_to_cpu(t->tagLocation); | |
3bf25cb4 | 818 | brelse(bh); |
1da177e4 LT |
819 | |
820 | if (ident == TAG_IDENT_AVDP && location == 256) | |
821 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); | |
822 | } | |
823 | } | |
824 | ||
6c79e987 | 825 | for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) { |
165923fa MS |
826 | if (!sbi->s_anchor[i]) |
827 | continue; | |
828 | bh = udf_read_tagged(sb, sbi->s_anchor[i], | |
829 | sbi->s_anchor[i], &ident); | |
830 | if (!bh) | |
831 | sbi->s_anchor[i] = 0; | |
832 | else { | |
833 | brelse(bh); | |
834 | if ((ident != TAG_IDENT_AVDP) && | |
835 | (i || (ident != TAG_IDENT_FE && | |
836 | ident != TAG_IDENT_EFE))) | |
6c79e987 | 837 | sbi->s_anchor[i] = 0; |
1da177e4 LT |
838 | } |
839 | } | |
840 | ||
6c79e987 | 841 | sbi->s_last_block = lastblock; |
1da177e4 LT |
842 | } |
843 | ||
3a71fc5d MS |
844 | static int udf_find_fileset(struct super_block *sb, |
845 | kernel_lb_addr *fileset, | |
846 | kernel_lb_addr *root) | |
1da177e4 LT |
847 | { |
848 | struct buffer_head *bh = NULL; | |
849 | long lastblock; | |
850 | uint16_t ident; | |
6c79e987 | 851 | struct udf_sb_info *sbi; |
1da177e4 LT |
852 | |
853 | if (fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 854 | fileset->partitionReferenceNum != 0xFFFF) { |
1da177e4 LT |
855 | bh = udf_read_ptagged(sb, *fileset, 0, &ident); |
856 | ||
28de7948 | 857 | if (!bh) { |
1da177e4 | 858 | return 1; |
28de7948 | 859 | } else if (ident != TAG_IDENT_FSD) { |
3bf25cb4 | 860 | brelse(bh); |
1da177e4 LT |
861 | return 1; |
862 | } | |
cb00ea35 | 863 | |
1da177e4 LT |
864 | } |
865 | ||
6c79e987 | 866 | sbi = UDF_SB(sb); |
3a71fc5d MS |
867 | if (!bh) { |
868 | /* Search backwards through the partitions */ | |
1da177e4 LT |
869 | kernel_lb_addr newfileset; |
870 | ||
28de7948 | 871 | /* --> cvg: FIXME - is it reasonable? */ |
1da177e4 | 872 | return 1; |
cb00ea35 | 873 | |
6c79e987 | 874 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
cb00ea35 CG |
875 | (newfileset.partitionReferenceNum != 0xFFFF && |
876 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
877 | fileset->partitionReferenceNum == 0xFFFF); | |
878 | newfileset.partitionReferenceNum--) { | |
6c79e987 MS |
879 | lastblock = sbi->s_partmaps |
880 | [newfileset.partitionReferenceNum] | |
881 | .s_partition_len; | |
1da177e4 LT |
882 | newfileset.logicalBlockNum = 0; |
883 | ||
cb00ea35 | 884 | do { |
3a71fc5d MS |
885 | bh = udf_read_ptagged(sb, newfileset, 0, |
886 | &ident); | |
cb00ea35 CG |
887 | if (!bh) { |
888 | newfileset.logicalBlockNum++; | |
1da177e4 LT |
889 | continue; |
890 | } | |
891 | ||
cb00ea35 CG |
892 | switch (ident) { |
893 | case TAG_IDENT_SBD: | |
28de7948 CG |
894 | { |
895 | struct spaceBitmapDesc *sp; | |
4b11111a MS |
896 | sp = (struct spaceBitmapDesc *) |
897 | bh->b_data; | |
28de7948 CG |
898 | newfileset.logicalBlockNum += 1 + |
899 | ((le32_to_cpu(sp->numOfBytes) + | |
4b11111a MS |
900 | sizeof(struct spaceBitmapDesc) |
901 | - 1) >> sb->s_blocksize_bits); | |
28de7948 CG |
902 | brelse(bh); |
903 | break; | |
904 | } | |
cb00ea35 | 905 | case TAG_IDENT_FSD: |
28de7948 CG |
906 | *fileset = newfileset; |
907 | break; | |
cb00ea35 | 908 | default: |
28de7948 CG |
909 | newfileset.logicalBlockNum++; |
910 | brelse(bh); | |
911 | bh = NULL; | |
912 | break; | |
1da177e4 | 913 | } |
28de7948 CG |
914 | } while (newfileset.logicalBlockNum < lastblock && |
915 | fileset->logicalBlockNum == 0xFFFFFFFF && | |
916 | fileset->partitionReferenceNum == 0xFFFF); | |
1da177e4 LT |
917 | } |
918 | } | |
919 | ||
920 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || | |
cb00ea35 | 921 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
1da177e4 | 922 | udf_debug("Fileset at block=%d, partition=%d\n", |
cb00ea35 CG |
923 | fileset->logicalBlockNum, |
924 | fileset->partitionReferenceNum); | |
1da177e4 | 925 | |
6c79e987 | 926 | sbi->s_partition = fileset->partitionReferenceNum; |
1da177e4 | 927 | udf_load_fileset(sb, bh, root); |
3bf25cb4 | 928 | brelse(bh); |
1da177e4 LT |
929 | return 0; |
930 | } | |
931 | return 1; | |
932 | } | |
933 | ||
c0eb31ed | 934 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
1da177e4 LT |
935 | { |
936 | struct primaryVolDesc *pvoldesc; | |
1da177e4 LT |
937 | struct ustr instr; |
938 | struct ustr outstr; | |
c0eb31ed JK |
939 | struct buffer_head *bh; |
940 | uint16_t ident; | |
941 | ||
942 | bh = udf_read_tagged(sb, block, block, &ident); | |
943 | if (!bh) | |
944 | return 1; | |
945 | BUG_ON(ident != TAG_IDENT_PVD); | |
1da177e4 LT |
946 | |
947 | pvoldesc = (struct primaryVolDesc *)bh->b_data; | |
948 | ||
56774805 MS |
949 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
950 | pvoldesc->recordingDateAndTime)) { | |
af15a298 MS |
951 | #ifdef UDFFS_DEBUG |
952 | timestamp *ts = &pvoldesc->recordingDateAndTime; | |
cbf5676a | 953 | udf_debug("recording time %04u/%02u/%02u" |
3a71fc5d | 954 | " %02u:%02u (%x)\n", |
af15a298 MS |
955 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, |
956 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); | |
957 | #endif | |
1da177e4 LT |
958 | } |
959 | ||
4b11111a | 960 | if (!udf_build_ustr(&instr, pvoldesc->volIdent, 32)) |
cb00ea35 | 961 | if (udf_CS0toUTF8(&outstr, &instr)) { |
6c79e987 | 962 | strncpy(UDF_SB(sb)->s_volume_ident, outstr.u_name, |
1da177e4 | 963 | outstr.u_len > 31 ? 31 : outstr.u_len); |
4b11111a MS |
964 | udf_debug("volIdent[] = '%s'\n", |
965 | UDF_SB(sb)->s_volume_ident); | |
1da177e4 | 966 | } |
1da177e4 | 967 | |
4b11111a | 968 | if (!udf_build_ustr(&instr, pvoldesc->volSetIdent, 128)) |
1da177e4 LT |
969 | if (udf_CS0toUTF8(&outstr, &instr)) |
970 | udf_debug("volSetIdent[] = '%s'\n", outstr.u_name); | |
c0eb31ed JK |
971 | |
972 | brelse(bh); | |
973 | return 0; | |
1da177e4 LT |
974 | } |
975 | ||
28de7948 CG |
976 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
977 | kernel_lb_addr *root) | |
1da177e4 LT |
978 | { |
979 | struct fileSetDesc *fset; | |
980 | ||
981 | fset = (struct fileSetDesc *)bh->b_data; | |
982 | ||
983 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); | |
984 | ||
6c79e987 | 985 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
1da177e4 | 986 | |
cb00ea35 CG |
987 | udf_debug("Rootdir at block=%d, partition=%d\n", |
988 | root->logicalBlockNum, root->partitionReferenceNum); | |
1da177e4 LT |
989 | } |
990 | ||
883cb9d1 MS |
991 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
992 | { | |
993 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; | |
8dee00bb JL |
994 | return DIV_ROUND_UP(map->s_partition_len + |
995 | (sizeof(struct spaceBitmapDesc) << 3), | |
996 | sb->s_blocksize * 8); | |
883cb9d1 MS |
997 | } |
998 | ||
66e1da3f MS |
999 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
1000 | { | |
66e1da3f MS |
1001 | struct udf_bitmap *bitmap; |
1002 | int nr_groups; | |
1003 | int size; | |
1004 | ||
883cb9d1 | 1005 | nr_groups = udf_compute_nr_groups(sb, index); |
66e1da3f MS |
1006 | size = sizeof(struct udf_bitmap) + |
1007 | (sizeof(struct buffer_head *) * nr_groups); | |
1008 | ||
1009 | if (size <= PAGE_SIZE) | |
1010 | bitmap = kmalloc(size, GFP_KERNEL); | |
1011 | else | |
1012 | bitmap = vmalloc(size); /* TODO: get rid of vmalloc */ | |
1013 | ||
1014 | if (bitmap == NULL) { | |
1015 | udf_error(sb, __FUNCTION__, | |
1016 | "Unable to allocate space for bitmap " | |
1017 | "and %d buffer_head pointers", nr_groups); | |
1018 | return NULL; | |
1019 | } | |
1020 | ||
1021 | memset(bitmap, 0x00, size); | |
1022 | bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); | |
1023 | bitmap->s_nr_groups = nr_groups; | |
1024 | return bitmap; | |
1025 | } | |
1026 | ||
3fb38dfa JK |
1027 | static int udf_fill_partdesc_info(struct super_block *sb, |
1028 | struct partitionDesc *p, int p_index) | |
1da177e4 | 1029 | { |
6c79e987 | 1030 | struct udf_part_map *map; |
165923fa | 1031 | struct udf_sb_info *sbi = UDF_SB(sb); |
3fb38dfa | 1032 | struct partitionHeaderDesc *phd; |
165923fa | 1033 | |
3fb38dfa | 1034 | map = &sbi->s_partmaps[p_index]; |
165923fa MS |
1035 | |
1036 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ | |
1037 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); | |
1038 | ||
1039 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) | |
1040 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; | |
1041 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) | |
1042 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; | |
1043 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) | |
1044 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; | |
1045 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) | |
1046 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; | |
1047 | ||
1048 | udf_debug("Partition (%d:%d type %x) starts at physical %d, " | |
3fb38dfa | 1049 | "block length %d\n", partitionNumber, p_index, |
165923fa MS |
1050 | map->s_partition_type, map->s_partition_root, |
1051 | map->s_partition_len); | |
1052 | ||
1053 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && | |
1054 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) | |
3fb38dfa | 1055 | return 0; |
165923fa MS |
1056 | |
1057 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; | |
1058 | if (phd->unallocSpaceTable.extLength) { | |
1059 | kernel_lb_addr loc = { | |
1060 | .logicalBlockNum = le32_to_cpu( | |
1061 | phd->unallocSpaceTable.extPosition), | |
3fb38dfa | 1062 | .partitionReferenceNum = p_index, |
165923fa MS |
1063 | }; |
1064 | ||
1065 | map->s_uspace.s_table = udf_iget(sb, loc); | |
1066 | if (!map->s_uspace.s_table) { | |
1067 | udf_debug("cannot load unallocSpaceTable (part %d)\n", | |
3fb38dfa JK |
1068 | p_index); |
1069 | return 1; | |
165923fa MS |
1070 | } |
1071 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; | |
1072 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", | |
3fb38dfa | 1073 | p_index, map->s_uspace.s_table->i_ino); |
165923fa MS |
1074 | } |
1075 | ||
1076 | if (phd->unallocSpaceBitmap.extLength) { | |
3fb38dfa JK |
1077 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1078 | if (!bitmap) | |
1079 | return 1; | |
165923fa | 1080 | map->s_uspace.s_bitmap = bitmap; |
2e0838fd | 1081 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1082 | phd->unallocSpaceBitmap.extLength); |
2e0838fd | 1083 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1084 | phd->unallocSpaceBitmap.extPosition); |
2e0838fd | 1085 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
3fb38dfa | 1086 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index, |
2e0838fd | 1087 | bitmap->s_extPosition); |
165923fa MS |
1088 | } |
1089 | ||
1090 | if (phd->partitionIntegrityTable.extLength) | |
3fb38dfa | 1091 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); |
165923fa MS |
1092 | |
1093 | if (phd->freedSpaceTable.extLength) { | |
1094 | kernel_lb_addr loc = { | |
1095 | .logicalBlockNum = le32_to_cpu( | |
1096 | phd->freedSpaceTable.extPosition), | |
3fb38dfa | 1097 | .partitionReferenceNum = p_index, |
165923fa MS |
1098 | }; |
1099 | ||
1100 | map->s_fspace.s_table = udf_iget(sb, loc); | |
1101 | if (!map->s_fspace.s_table) { | |
3fb38dfa JK |
1102 | udf_debug("cannot load freedSpaceTable (part %d)\n", |
1103 | p_index); | |
1104 | return 1; | |
165923fa MS |
1105 | } |
1106 | ||
1107 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; | |
1108 | udf_debug("freedSpaceTable (part %d) @ %ld\n", | |
3fb38dfa | 1109 | p_index, map->s_fspace.s_table->i_ino); |
165923fa MS |
1110 | } |
1111 | ||
1112 | if (phd->freedSpaceBitmap.extLength) { | |
3fb38dfa JK |
1113 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
1114 | if (!bitmap) | |
1115 | return 1; | |
165923fa | 1116 | map->s_fspace.s_bitmap = bitmap; |
2e0838fd | 1117 | bitmap->s_extLength = le32_to_cpu( |
165923fa | 1118 | phd->freedSpaceBitmap.extLength); |
2e0838fd | 1119 | bitmap->s_extPosition = le32_to_cpu( |
165923fa | 1120 | phd->freedSpaceBitmap.extPosition); |
2e0838fd | 1121 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
3fb38dfa | 1122 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index, |
2e0838fd | 1123 | bitmap->s_extPosition); |
165923fa | 1124 | } |
3fb38dfa JK |
1125 | return 0; |
1126 | } | |
1127 | ||
1128 | static int udf_load_partdesc(struct super_block *sb, sector_t block) | |
1129 | { | |
1130 | struct buffer_head *bh; | |
1131 | struct partitionDesc *p; | |
1132 | struct udf_part_map *map; | |
1133 | struct udf_sb_info *sbi = UDF_SB(sb); | |
1134 | bool found = false; | |
1135 | int i; | |
1136 | uint16_t partitionNumber; | |
1137 | uint16_t ident; | |
1138 | int ret = 0; | |
1139 | ||
1140 | bh = udf_read_tagged(sb, block, block, &ident); | |
1141 | if (!bh) | |
1142 | return 1; | |
1143 | if (ident != TAG_IDENT_PD) | |
1144 | goto out_bh; | |
1145 | ||
1146 | p = (struct partitionDesc *)bh->b_data; | |
1147 | partitionNumber = le16_to_cpu(p->partitionNumber); | |
1148 | for (i = 0; i < sbi->s_partitions; i++) { | |
1149 | map = &sbi->s_partmaps[i]; | |
1150 | udf_debug("Searching map: (%d == %d)\n", | |
1151 | map->s_partition_num, partitionNumber); | |
1152 | found = map->s_partition_num == partitionNumber; | |
1153 | if (found) | |
1154 | break; | |
1155 | } | |
1156 | ||
1157 | if (!found) { | |
1158 | udf_debug("Partition (%d) not found in partition map\n", | |
1159 | partitionNumber); | |
1160 | goto out_bh; | |
1161 | } | |
165923fa | 1162 | |
3fb38dfa | 1163 | ret = udf_fill_partdesc_info(sb, p, i); |
c0eb31ed | 1164 | out_bh: |
2e0838fd | 1165 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
c0eb31ed JK |
1166 | brelse(bh); |
1167 | return ret; | |
1da177e4 LT |
1168 | } |
1169 | ||
c0eb31ed | 1170 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
28de7948 | 1171 | kernel_lb_addr *fileset) |
1da177e4 LT |
1172 | { |
1173 | struct logicalVolDesc *lvd; | |
1174 | int i, j, offset; | |
1175 | uint8_t type; | |
6c79e987 | 1176 | struct udf_sb_info *sbi = UDF_SB(sb); |
4b11111a | 1177 | struct genericPartitionMap *gpm; |
c0eb31ed JK |
1178 | uint16_t ident; |
1179 | struct buffer_head *bh; | |
1180 | int ret = 0; | |
1da177e4 | 1181 | |
c0eb31ed JK |
1182 | bh = udf_read_tagged(sb, block, block, &ident); |
1183 | if (!bh) | |
1184 | return 1; | |
1185 | BUG_ON(ident != TAG_IDENT_LVD); | |
1da177e4 LT |
1186 | lvd = (struct logicalVolDesc *)bh->b_data; |
1187 | ||
dc5d39be | 1188 | i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
c0eb31ed JK |
1189 | if (i != 0) { |
1190 | ret = i; | |
1191 | goto out_bh; | |
1192 | } | |
1da177e4 | 1193 | |
cb00ea35 | 1194 | for (i = 0, offset = 0; |
6c79e987 | 1195 | i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength); |
4b11111a MS |
1196 | i++, offset += gpm->partitionMapLength) { |
1197 | struct udf_part_map *map = &sbi->s_partmaps[i]; | |
1198 | gpm = (struct genericPartitionMap *) | |
1199 | &(lvd->partitionMaps[offset]); | |
1200 | type = gpm->partitionMapType; | |
cb00ea35 | 1201 | if (type == 1) { |
4b11111a MS |
1202 | struct genericPartitionMap1 *gpm1 = |
1203 | (struct genericPartitionMap1 *)gpm; | |
6c79e987 MS |
1204 | map->s_partition_type = UDF_TYPE1_MAP15; |
1205 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); | |
1206 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); | |
1207 | map->s_partition_func = NULL; | |
cb00ea35 | 1208 | } else if (type == 2) { |
4b11111a MS |
1209 | struct udfPartitionMap2 *upm2 = |
1210 | (struct udfPartitionMap2 *)gpm; | |
1211 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, | |
1212 | strlen(UDF_ID_VIRTUAL))) { | |
1213 | u16 suf = | |
1214 | le16_to_cpu(((__le16 *)upm2->partIdent. | |
1215 | identSuffix)[0]); | |
1216 | if (suf == 0x0150) { | |
1217 | map->s_partition_type = | |
1218 | UDF_VIRTUAL_MAP15; | |
1219 | map->s_partition_func = | |
1220 | udf_get_pblock_virt15; | |
1221 | } else if (suf == 0x0200) { | |
1222 | map->s_partition_type = | |
1223 | UDF_VIRTUAL_MAP20; | |
1224 | map->s_partition_func = | |
1225 | udf_get_pblock_virt20; | |
1da177e4 | 1226 | } |
4b11111a MS |
1227 | } else if (!strncmp(upm2->partIdent.ident, |
1228 | UDF_ID_SPARABLE, | |
1229 | strlen(UDF_ID_SPARABLE))) { | |
1da177e4 | 1230 | uint32_t loc; |
1da177e4 | 1231 | struct sparingTable *st; |
4b11111a MS |
1232 | struct sparablePartitionMap *spm = |
1233 | (struct sparablePartitionMap *)gpm; | |
28de7948 | 1234 | |
6c79e987 | 1235 | map->s_partition_type = UDF_SPARABLE_MAP15; |
4b11111a MS |
1236 | map->s_type_specific.s_sparing.s_packet_len = |
1237 | le16_to_cpu(spm->packetLength); | |
cb00ea35 | 1238 | for (j = 0; j < spm->numSparingTables; j++) { |
4b11111a MS |
1239 | struct buffer_head *bh2; |
1240 | ||
1241 | loc = le32_to_cpu( | |
1242 | spm->locSparingTable[j]); | |
1243 | bh2 = udf_read_tagged(sb, loc, loc, | |
1244 | &ident); | |
1245 | map->s_type_specific.s_sparing. | |
1246 | s_spar_map[j] = bh2; | |
1247 | ||
165923fa MS |
1248 | if (bh2 == NULL) |
1249 | continue; | |
1250 | ||
1251 | st = (struct sparingTable *)bh2->b_data; | |
1252 | if (ident != 0 || strncmp( | |
1253 | st->sparingIdent.ident, | |
1254 | UDF_ID_SPARING, | |
1255 | strlen(UDF_ID_SPARING))) { | |
1256 | brelse(bh2); | |
1257 | map->s_type_specific.s_sparing. | |
1258 | s_spar_map[j] = NULL; | |
1da177e4 LT |
1259 | } |
1260 | } | |
6c79e987 | 1261 | map->s_partition_func = udf_get_pblock_spar15; |
cb00ea35 | 1262 | } else { |
3a71fc5d MS |
1263 | udf_debug("Unknown ident: %s\n", |
1264 | upm2->partIdent.ident); | |
1da177e4 LT |
1265 | continue; |
1266 | } | |
6c79e987 MS |
1267 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
1268 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); | |
1da177e4 LT |
1269 | } |
1270 | udf_debug("Partition (%d:%d) type %d on volume %d\n", | |
6c79e987 MS |
1271 | i, map->s_partition_num, type, |
1272 | map->s_volumeseqnum); | |
1da177e4 LT |
1273 | } |
1274 | ||
cb00ea35 | 1275 | if (fileset) { |
28de7948 | 1276 | long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]); |
1da177e4 LT |
1277 | |
1278 | *fileset = lelb_to_cpu(la->extLocation); | |
3a71fc5d MS |
1279 | udf_debug("FileSet found in LogicalVolDesc at block=%d, " |
1280 | "partition=%d\n", fileset->logicalBlockNum, | |
28de7948 | 1281 | fileset->partitionReferenceNum); |
1da177e4 LT |
1282 | } |
1283 | if (lvd->integritySeqExt.extLength) | |
1284 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); | |
28de7948 | 1285 | |
c0eb31ed JK |
1286 | out_bh: |
1287 | brelse(bh); | |
1288 | return ret; | |
1da177e4 LT |
1289 | } |
1290 | ||
1291 | /* | |
1292 | * udf_load_logicalvolint | |
1293 | * | |
1294 | */ | |
cb00ea35 | 1295 | static void udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc) |
1da177e4 LT |
1296 | { |
1297 | struct buffer_head *bh = NULL; | |
1298 | uint16_t ident; | |
6c79e987 MS |
1299 | struct udf_sb_info *sbi = UDF_SB(sb); |
1300 | struct logicalVolIntegrityDesc *lvid; | |
1da177e4 LT |
1301 | |
1302 | while (loc.extLength > 0 && | |
cb00ea35 CG |
1303 | (bh = udf_read_tagged(sb, loc.extLocation, |
1304 | loc.extLocation, &ident)) && | |
1305 | ident == TAG_IDENT_LVID) { | |
6c79e987 MS |
1306 | sbi->s_lvid_bh = bh; |
1307 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
cb00ea35 | 1308 | |
6c79e987 | 1309 | if (lvid->nextIntegrityExt.extLength) |
3a71fc5d | 1310 | udf_load_logicalvolint(sb, |
6c79e987 | 1311 | leea_to_cpu(lvid->nextIntegrityExt)); |
cb00ea35 | 1312 | |
6c79e987 | 1313 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1314 | brelse(bh); |
1da177e4 | 1315 | loc.extLength -= sb->s_blocksize; |
cb00ea35 | 1316 | loc.extLocation++; |
1da177e4 | 1317 | } |
6c79e987 | 1318 | if (sbi->s_lvid_bh != bh) |
3bf25cb4 | 1319 | brelse(bh); |
1da177e4 LT |
1320 | } |
1321 | ||
1322 | /* | |
1323 | * udf_process_sequence | |
1324 | * | |
1325 | * PURPOSE | |
1326 | * Process a main/reserve volume descriptor sequence. | |
1327 | * | |
1328 | * PRE-CONDITIONS | |
1329 | * sb Pointer to _locked_ superblock. | |
1330 | * block First block of first extent of the sequence. | |
1331 | * lastblock Lastblock of first extent of the sequence. | |
1332 | * | |
1333 | * HISTORY | |
1334 | * July 1, 1997 - Andrew E. Mileski | |
1335 | * Written, tested, and released. | |
1336 | */ | |
200a3592 | 1337 | static noinline int udf_process_sequence(struct super_block *sb, long block, |
3a71fc5d | 1338 | long lastblock, kernel_lb_addr *fileset) |
1da177e4 LT |
1339 | { |
1340 | struct buffer_head *bh = NULL; | |
1341 | struct udf_vds_record vds[VDS_POS_LENGTH]; | |
4b11111a | 1342 | struct udf_vds_record *curr; |
1da177e4 LT |
1343 | struct generic_desc *gd; |
1344 | struct volDescPtr *vdp; | |
cb00ea35 | 1345 | int done = 0; |
1da177e4 LT |
1346 | uint32_t vdsn; |
1347 | uint16_t ident; | |
1348 | long next_s = 0, next_e = 0; | |
1349 | ||
1350 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); | |
1351 | ||
c0eb31ed JK |
1352 | /* |
1353 | * Read the main descriptor sequence and find which descriptors | |
1354 | * are in it. | |
1355 | */ | |
cb00ea35 | 1356 | for (; (!done && block <= lastblock); block++) { |
1da177e4 LT |
1357 | |
1358 | bh = udf_read_tagged(sb, block, block, &ident); | |
c0eb31ed JK |
1359 | if (!bh) { |
1360 | printk(KERN_ERR "udf: Block %Lu of volume descriptor " | |
1361 | "sequence is corrupted or we could not read " | |
1362 | "it.\n", (unsigned long long)block); | |
1363 | return 1; | |
1364 | } | |
1da177e4 LT |
1365 | |
1366 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ | |
1367 | gd = (struct generic_desc *)bh->b_data; | |
1368 | vdsn = le32_to_cpu(gd->volDescSeqNum); | |
cb00ea35 | 1369 | switch (ident) { |
28de7948 | 1370 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
4b11111a MS |
1371 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
1372 | if (vdsn >= curr->volDescSeqNum) { | |
1373 | curr->volDescSeqNum = vdsn; | |
1374 | curr->block = block; | |
cb00ea35 CG |
1375 | } |
1376 | break; | |
28de7948 | 1377 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
4b11111a MS |
1378 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
1379 | if (vdsn >= curr->volDescSeqNum) { | |
1380 | curr->volDescSeqNum = vdsn; | |
1381 | curr->block = block; | |
cb00ea35 CG |
1382 | |
1383 | vdp = (struct volDescPtr *)bh->b_data; | |
4b11111a MS |
1384 | next_s = le32_to_cpu( |
1385 | vdp->nextVolDescSeqExt.extLocation); | |
1386 | next_e = le32_to_cpu( | |
1387 | vdp->nextVolDescSeqExt.extLength); | |
cb00ea35 CG |
1388 | next_e = next_e >> sb->s_blocksize_bits; |
1389 | next_e += next_s; | |
1390 | } | |
1391 | break; | |
28de7948 | 1392 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
4b11111a MS |
1393 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
1394 | if (vdsn >= curr->volDescSeqNum) { | |
1395 | curr->volDescSeqNum = vdsn; | |
1396 | curr->block = block; | |
cb00ea35 CG |
1397 | } |
1398 | break; | |
28de7948 | 1399 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
4b11111a MS |
1400 | curr = &vds[VDS_POS_PARTITION_DESC]; |
1401 | if (!curr->block) | |
1402 | curr->block = block; | |
cb00ea35 | 1403 | break; |
28de7948 | 1404 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
4b11111a MS |
1405 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
1406 | if (vdsn >= curr->volDescSeqNum) { | |
1407 | curr->volDescSeqNum = vdsn; | |
1408 | curr->block = block; | |
cb00ea35 CG |
1409 | } |
1410 | break; | |
28de7948 | 1411 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
4b11111a MS |
1412 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
1413 | if (vdsn >= curr->volDescSeqNum) { | |
1414 | curr->volDescSeqNum = vdsn; | |
1415 | curr->block = block; | |
cb00ea35 CG |
1416 | } |
1417 | break; | |
28de7948 | 1418 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
cb00ea35 CG |
1419 | vds[VDS_POS_TERMINATING_DESC].block = block; |
1420 | if (next_e) { | |
1421 | block = next_s; | |
1422 | lastblock = next_e; | |
1423 | next_s = next_e = 0; | |
4b11111a | 1424 | } else |
cb00ea35 CG |
1425 | done = 1; |
1426 | break; | |
1da177e4 | 1427 | } |
3bf25cb4 | 1428 | brelse(bh); |
1da177e4 | 1429 | } |
c0eb31ed JK |
1430 | /* |
1431 | * Now read interesting descriptors again and process them | |
1432 | * in a suitable order | |
1433 | */ | |
1434 | if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { | |
1435 | printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n"); | |
1436 | return 1; | |
1437 | } | |
1438 | if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) | |
1439 | return 1; | |
165923fa | 1440 | |
c0eb31ed JK |
1441 | if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, |
1442 | vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) | |
1443 | return 1; | |
165923fa | 1444 | |
c0eb31ed JK |
1445 | if (vds[VDS_POS_PARTITION_DESC].block) { |
1446 | /* | |
1447 | * We rescan the whole descriptor sequence to find | |
1448 | * partition descriptor blocks and process them. | |
1449 | */ | |
1450 | for (block = vds[VDS_POS_PARTITION_DESC].block; | |
1451 | block < vds[VDS_POS_TERMINATING_DESC].block; | |
1452 | block++) | |
1453 | if (udf_load_partdesc(sb, block)) | |
165923fa | 1454 | return 1; |
1da177e4 LT |
1455 | } |
1456 | ||
1457 | return 0; | |
1458 | } | |
1459 | ||
1460 | /* | |
1461 | * udf_check_valid() | |
1462 | */ | |
cb00ea35 | 1463 | static int udf_check_valid(struct super_block *sb, int novrs, int silent) |
1da177e4 LT |
1464 | { |
1465 | long block; | |
d0db181c | 1466 | struct udf_sb_info *sbi = UDF_SB(sb); |
1da177e4 | 1467 | |
cb00ea35 | 1468 | if (novrs) { |
1da177e4 LT |
1469 | udf_debug("Validity check skipped because of novrs option\n"); |
1470 | return 0; | |
1471 | } | |
1472 | /* Check that it is NSR02 compliant */ | |
1473 | /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ | |
165923fa | 1474 | block = udf_vrs(sb, silent); |
d0db181c PE |
1475 | if (block == -1) |
1476 | udf_debug("Failed to read byte 32768. Assuming open " | |
1477 | "disc. Skipping validity check\n"); | |
1478 | if (block && !sbi->s_last_block) | |
165923fa | 1479 | sbi->s_last_block = udf_get_last_block(sb); |
d0db181c | 1480 | return !block; |
1da177e4 LT |
1481 | } |
1482 | ||
28de7948 | 1483 | static int udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset) |
1da177e4 LT |
1484 | { |
1485 | struct anchorVolDescPtr *anchor; | |
1486 | uint16_t ident; | |
1487 | struct buffer_head *bh; | |
1488 | long main_s, main_e, reserve_s, reserve_e; | |
1489 | int i, j; | |
6c79e987 | 1490 | struct udf_sb_info *sbi; |
1da177e4 LT |
1491 | |
1492 | if (!sb) | |
1493 | return 1; | |
6c79e987 | 1494 | sbi = UDF_SB(sb); |
1da177e4 | 1495 | |
6c79e987 | 1496 | for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) { |
28f7c4d4 MS |
1497 | if (!sbi->s_anchor[i]) |
1498 | continue; | |
165923fa | 1499 | |
28f7c4d4 MS |
1500 | bh = udf_read_tagged(sb, sbi->s_anchor[i], sbi->s_anchor[i], |
1501 | &ident); | |
1502 | if (!bh) | |
1503 | continue; | |
1504 | ||
1505 | anchor = (struct anchorVolDescPtr *)bh->b_data; | |
1506 | ||
1507 | /* Locate the main sequence */ | |
1508 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); | |
1509 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); | |
1510 | main_e = main_e >> sb->s_blocksize_bits; | |
1511 | main_e += main_s; | |
1512 | ||
1513 | /* Locate the reserve sequence */ | |
1514 | reserve_s = le32_to_cpu( | |
4b11111a | 1515 | anchor->reserveVolDescSeqExt.extLocation); |
28f7c4d4 | 1516 | reserve_e = le32_to_cpu( |
4b11111a | 1517 | anchor->reserveVolDescSeqExt.extLength); |
28f7c4d4 MS |
1518 | reserve_e = reserve_e >> sb->s_blocksize_bits; |
1519 | reserve_e += reserve_s; | |
1da177e4 | 1520 | |
28f7c4d4 | 1521 | brelse(bh); |
1da177e4 | 1522 | |
28f7c4d4 MS |
1523 | /* Process the main & reserve sequences */ |
1524 | /* responsible for finding the PartitionDesc(s) */ | |
1525 | if (!(udf_process_sequence(sb, main_s, main_e, | |
1526 | fileset) && | |
1527 | udf_process_sequence(sb, reserve_s, reserve_e, | |
1528 | fileset))) | |
1529 | break; | |
1da177e4 LT |
1530 | } |
1531 | ||
6c79e987 | 1532 | if (i == ARRAY_SIZE(sbi->s_anchor)) { |
1da177e4 LT |
1533 | udf_debug("No Anchor block found\n"); |
1534 | return 1; | |
28f7c4d4 MS |
1535 | } |
1536 | udf_debug("Using anchor in block %d\n", sbi->s_anchor[i]); | |
1da177e4 | 1537 | |
6c79e987 | 1538 | for (i = 0; i < sbi->s_partitions; i++) { |
28de7948 | 1539 | kernel_lb_addr uninitialized_var(ino); |
6c79e987 | 1540 | struct udf_part_map *map = &sbi->s_partmaps[i]; |
1da177e4 | 1541 | |
165923fa MS |
1542 | if (map->s_partition_type != UDF_VIRTUAL_MAP15 && |
1543 | map->s_partition_type != UDF_VIRTUAL_MAP20) | |
1544 | continue; | |
1da177e4 | 1545 | |
165923fa MS |
1546 | if (!sbi->s_last_block) { |
1547 | sbi->s_last_block = udf_get_last_block(sb); | |
1548 | udf_find_anchor(sb); | |
1549 | } | |
1550 | ||
1551 | if (!sbi->s_last_block) { | |
1552 | udf_debug("Unable to determine Lastblock (For " | |
1553 | "Virtual Partition)\n"); | |
1554 | return 1; | |
1555 | } | |
1556 | ||
1557 | for (j = 0; j < sbi->s_partitions; j++) { | |
1558 | struct udf_part_map *map2 = &sbi->s_partmaps[j]; | |
1559 | if (j != i && | |
1560 | map->s_volumeseqnum == | |
1561 | map2->s_volumeseqnum && | |
1562 | map->s_partition_num == | |
1563 | map2->s_partition_num) { | |
1564 | ino.partitionReferenceNum = j; | |
1565 | ino.logicalBlockNum = | |
1566 | sbi->s_last_block - | |
1567 | map2->s_partition_root; | |
1568 | break; | |
28de7948 | 1569 | } |
165923fa | 1570 | } |
1da177e4 | 1571 | |
165923fa MS |
1572 | if (j == sbi->s_partitions) |
1573 | return 1; | |
1da177e4 | 1574 | |
165923fa MS |
1575 | sbi->s_vat_inode = udf_iget(sb, ino); |
1576 | if (!sbi->s_vat_inode) | |
1577 | return 1; | |
1da177e4 | 1578 | |
165923fa MS |
1579 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { |
1580 | map->s_type_specific.s_virtual.s_start_offset = | |
1581 | udf_ext0_offset(sbi->s_vat_inode); | |
1582 | map->s_type_specific.s_virtual.s_num_entries = | |
1583 | (sbi->s_vat_inode->i_size - 36) >> 2; | |
1584 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { | |
1585 | uint32_t pos; | |
1586 | struct virtualAllocationTable20 *vat20; | |
1587 | ||
1588 | pos = udf_block_map(sbi->s_vat_inode, 0); | |
1589 | bh = sb_bread(sb, pos); | |
1590 | if (!bh) | |
1591 | return 1; | |
1592 | vat20 = (struct virtualAllocationTable20 *) | |
1593 | bh->b_data + | |
1594 | udf_ext0_offset(sbi->s_vat_inode); | |
1595 | map->s_type_specific.s_virtual.s_start_offset = | |
1596 | le16_to_cpu(vat20->lengthHeader) + | |
1597 | udf_ext0_offset(sbi->s_vat_inode); | |
1598 | map->s_type_specific.s_virtual.s_num_entries = | |
1599 | (sbi->s_vat_inode->i_size - | |
1600 | map->s_type_specific.s_virtual. | |
1601 | s_start_offset) >> 2; | |
1602 | brelse(bh); | |
1da177e4 | 1603 | } |
165923fa MS |
1604 | map->s_partition_root = udf_get_pblock(sb, 0, i, 0); |
1605 | map->s_partition_len = | |
1606 | sbi->s_partmaps[ino.partitionReferenceNum]. | |
1607 | s_partition_len; | |
1da177e4 LT |
1608 | } |
1609 | return 0; | |
1610 | } | |
1611 | ||
1612 | static void udf_open_lvid(struct super_block *sb) | |
1613 | { | |
6c79e987 MS |
1614 | struct udf_sb_info *sbi = UDF_SB(sb); |
1615 | struct buffer_head *bh = sbi->s_lvid_bh; | |
165923fa MS |
1616 | struct logicalVolIntegrityDesc *lvid; |
1617 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
1618 | if (!bh) | |
1619 | return; | |
1620 | ||
1621 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1622 | lvidiu = udf_sb_lvidiu(sbi); | |
1623 | ||
1624 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1625 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1626 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, | |
1627 | CURRENT_TIME); | |
1628 | lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN; | |
1629 | ||
1630 | lvid->descTag.descCRC = cpu_to_le16( | |
1631 | udf_crc((char *)lvid + sizeof(tag), | |
1632 | le16_to_cpu(lvid->descTag.descCRCLength), 0)); | |
1633 | ||
1634 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1635 | mark_buffer_dirty(bh); | |
1da177e4 LT |
1636 | } |
1637 | ||
1638 | static void udf_close_lvid(struct super_block *sb) | |
1639 | { | |
6c79e987 MS |
1640 | struct udf_sb_info *sbi = UDF_SB(sb); |
1641 | struct buffer_head *bh = sbi->s_lvid_bh; | |
1642 | struct logicalVolIntegrityDesc *lvid; | |
165923fa | 1643 | struct logicalVolIntegrityDescImpUse *lvidiu; |
28de7948 | 1644 | |
6c79e987 MS |
1645 | if (!bh) |
1646 | return; | |
1647 | ||
1648 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; | |
1649 | ||
165923fa MS |
1650 | if (lvid->integrityType != LVID_INTEGRITY_TYPE_OPEN) |
1651 | return; | |
1652 | ||
1653 | lvidiu = udf_sb_lvidiu(sbi); | |
1654 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; | |
1655 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; | |
1656 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); | |
1657 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) | |
1658 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); | |
1659 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) | |
1660 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); | |
1661 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) | |
1662 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); | |
1663 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); | |
1664 | ||
1665 | lvid->descTag.descCRC = cpu_to_le16( | |
1666 | udf_crc((char *)lvid + sizeof(tag), | |
1667 | le16_to_cpu(lvid->descTag.descCRCLength), | |
1668 | 0)); | |
1669 | ||
1670 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); | |
1671 | mark_buffer_dirty(bh); | |
1da177e4 LT |
1672 | } |
1673 | ||
66e1da3f MS |
1674 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
1675 | { | |
1676 | int i; | |
1677 | int nr_groups = bitmap->s_nr_groups; | |
4b11111a MS |
1678 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * |
1679 | nr_groups); | |
66e1da3f MS |
1680 | |
1681 | for (i = 0; i < nr_groups; i++) | |
1682 | if (bitmap->s_block_bitmap[i]) | |
1683 | brelse(bitmap->s_block_bitmap[i]); | |
1684 | ||
1685 | if (size <= PAGE_SIZE) | |
1686 | kfree(bitmap); | |
1687 | else | |
1688 | vfree(bitmap); | |
1689 | } | |
1690 | ||
2e0838fd JK |
1691 | static void udf_free_partition(struct udf_part_map *map) |
1692 | { | |
1693 | int i; | |
1694 | ||
1695 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) | |
1696 | iput(map->s_uspace.s_table); | |
1697 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) | |
1698 | iput(map->s_fspace.s_table); | |
1699 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) | |
1700 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); | |
1701 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) | |
1702 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); | |
1703 | if (map->s_partition_type == UDF_SPARABLE_MAP15) | |
1704 | for (i = 0; i < 4; i++) | |
1705 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); | |
1706 | } | |
1707 | ||
1da177e4 LT |
1708 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
1709 | { | |
1710 | int i; | |
cb00ea35 | 1711 | struct inode *inode = NULL; |
1da177e4 LT |
1712 | struct udf_options uopt; |
1713 | kernel_lb_addr rootdir, fileset; | |
1714 | struct udf_sb_info *sbi; | |
1715 | ||
1716 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); | |
1717 | uopt.uid = -1; | |
1718 | uopt.gid = -1; | |
1719 | uopt.umask = 0; | |
1720 | ||
6c79e987 | 1721 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
1da177e4 LT |
1722 | if (!sbi) |
1723 | return -ENOMEM; | |
28de7948 | 1724 | |
1da177e4 | 1725 | sb->s_fs_info = sbi; |
1da177e4 | 1726 | |
1e7933de | 1727 | mutex_init(&sbi->s_alloc_mutex); |
1da177e4 | 1728 | |
6da80894 | 1729 | if (!udf_parse_options((char *)options, &uopt, false)) |
1da177e4 LT |
1730 | goto error_out; |
1731 | ||
1732 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && | |
cb00ea35 | 1733 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
1da177e4 | 1734 | udf_error(sb, "udf_read_super", |
cb00ea35 | 1735 | "utf8 cannot be combined with iocharset\n"); |
1da177e4 LT |
1736 | goto error_out; |
1737 | } | |
1738 | #ifdef CONFIG_UDF_NLS | |
cb00ea35 | 1739 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
1da177e4 LT |
1740 | uopt.nls_map = load_nls_default(); |
1741 | if (!uopt.nls_map) | |
1742 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); | |
1743 | else | |
1744 | udf_debug("Using default NLS map\n"); | |
1745 | } | |
1746 | #endif | |
1747 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) | |
1748 | uopt.flags |= (1 << UDF_FLAG_UTF8); | |
1749 | ||
1750 | fileset.logicalBlockNum = 0xFFFFFFFF; | |
1751 | fileset.partitionReferenceNum = 0xFFFF; | |
1752 | ||
6c79e987 MS |
1753 | sbi->s_flags = uopt.flags; |
1754 | sbi->s_uid = uopt.uid; | |
1755 | sbi->s_gid = uopt.gid; | |
1756 | sbi->s_umask = uopt.umask; | |
1757 | sbi->s_nls_map = uopt.nls_map; | |
1da177e4 LT |
1758 | |
1759 | /* Set the block size for all transfers */ | |
f1f73ba8 CH |
1760 | if (!sb_min_blocksize(sb, uopt.blocksize)) { |
1761 | udf_debug("Bad block size (%d)\n", uopt.blocksize); | |
1762 | printk(KERN_ERR "udf: bad block size (%d)\n", uopt.blocksize); | |
1da177e4 | 1763 | goto error_out; |
f1f73ba8 | 1764 | } |
1da177e4 | 1765 | |
cb00ea35 | 1766 | if (uopt.session == 0xFFFFFFFF) |
6c79e987 | 1767 | sbi->s_session = udf_get_last_session(sb); |
1da177e4 | 1768 | else |
6c79e987 | 1769 | sbi->s_session = uopt.session; |
1da177e4 | 1770 | |
6c79e987 | 1771 | udf_debug("Multi-session=%d\n", sbi->s_session); |
1da177e4 | 1772 | |
6c79e987 MS |
1773 | sbi->s_last_block = uopt.lastblock; |
1774 | sbi->s_anchor[0] = sbi->s_anchor[1] = 0; | |
1775 | sbi->s_anchor[2] = uopt.anchor; | |
1776 | sbi->s_anchor[3] = 256; | |
1da177e4 | 1777 | |
3a71fc5d MS |
1778 | if (udf_check_valid(sb, uopt.novrs, silent)) { |
1779 | /* read volume recognition sequences */ | |
1780 | printk(KERN_WARNING "UDF-fs: No VRS found\n"); | |
cb00ea35 | 1781 | goto error_out; |
1da177e4 LT |
1782 | } |
1783 | ||
1784 | udf_find_anchor(sb); | |
1785 | ||
1786 | /* Fill in the rest of the superblock */ | |
1787 | sb->s_op = &udf_sb_ops; | |
1788 | sb->dq_op = NULL; | |
1789 | sb->s_dirt = 0; | |
1790 | sb->s_magic = UDF_SUPER_MAGIC; | |
1791 | sb->s_time_gran = 1000; | |
1792 | ||
cb00ea35 | 1793 | if (udf_load_partition(sb, &fileset)) { |
3a71fc5d | 1794 | printk(KERN_WARNING "UDF-fs: No partition found (1)\n"); |
1da177e4 LT |
1795 | goto error_out; |
1796 | } | |
1797 | ||
6c79e987 | 1798 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
1da177e4 | 1799 | |
6c79e987 | 1800 | if (sbi->s_lvid_bh) { |
4b11111a MS |
1801 | struct logicalVolIntegrityDescImpUse *lvidiu = |
1802 | udf_sb_lvidiu(sbi); | |
6c79e987 MS |
1803 | uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); |
1804 | uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); | |
4b11111a MS |
1805 | /* uint16_t maxUDFWriteRev = |
1806 | le16_to_cpu(lvidiu->maxUDFWriteRev); */ | |
1da177e4 | 1807 | |
cb00ea35 | 1808 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
4b11111a MS |
1809 | printk(KERN_ERR "UDF-fs: minUDFReadRev=%x " |
1810 | "(max is %x)\n", | |
6c79e987 | 1811 | le16_to_cpu(lvidiu->minUDFReadRev), |
cb00ea35 | 1812 | UDF_MAX_READ_VERSION); |
1da177e4 | 1813 | goto error_out; |
4b11111a | 1814 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) |
1da177e4 | 1815 | sb->s_flags |= MS_RDONLY; |
1da177e4 | 1816 | |
6c79e987 | 1817 | sbi->s_udfrev = minUDFWriteRev; |
1da177e4 LT |
1818 | |
1819 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) | |
1820 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); | |
1821 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) | |
1822 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); | |
1823 | } | |
1824 | ||
6c79e987 | 1825 | if (!sbi->s_partitions) { |
3a71fc5d | 1826 | printk(KERN_WARNING "UDF-fs: No partition found (2)\n"); |
1da177e4 LT |
1827 | goto error_out; |
1828 | } | |
1829 | ||
4b11111a MS |
1830 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
1831 | UDF_PART_FLAG_READ_ONLY) { | |
1832 | printk(KERN_NOTICE "UDF-fs: Partition marked readonly; " | |
1833 | "forcing readonly mount\n"); | |
39b3f6d6 | 1834 | sb->s_flags |= MS_RDONLY; |
c1a26e7d | 1835 | } |
39b3f6d6 | 1836 | |
cb00ea35 | 1837 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
3a71fc5d | 1838 | printk(KERN_WARNING "UDF-fs: No fileset found\n"); |
1da177e4 LT |
1839 | goto error_out; |
1840 | } | |
1841 | ||
cb00ea35 | 1842 | if (!silent) { |
56774805 MS |
1843 | timestamp ts; |
1844 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); | |
a9ca6635 | 1845 | udf_info("UDF: Mounting volume '%s', " |
28de7948 | 1846 | "timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
56774805 MS |
1847 | sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day, |
1848 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); | |
1da177e4 LT |
1849 | } |
1850 | if (!(sb->s_flags & MS_RDONLY)) | |
1851 | udf_open_lvid(sb); | |
1852 | ||
1853 | /* Assign the root inode */ | |
1854 | /* assign inodes by physical block number */ | |
1855 | /* perhaps it's not extensible enough, but for now ... */ | |
cb00ea35 CG |
1856 | inode = udf_iget(sb, rootdir); |
1857 | if (!inode) { | |
4b11111a MS |
1858 | printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, " |
1859 | "partition=%d\n", | |
cb00ea35 | 1860 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
1da177e4 LT |
1861 | goto error_out; |
1862 | } | |
1863 | ||
1864 | /* Allocate a dentry for the root inode */ | |
1865 | sb->s_root = d_alloc_root(inode); | |
cb00ea35 | 1866 | if (!sb->s_root) { |
3a71fc5d | 1867 | printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n"); |
1da177e4 LT |
1868 | iput(inode); |
1869 | goto error_out; | |
1870 | } | |
31170b6a | 1871 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
1da177e4 LT |
1872 | return 0; |
1873 | ||
28de7948 | 1874 | error_out: |
6c79e987 MS |
1875 | if (sbi->s_vat_inode) |
1876 | iput(sbi->s_vat_inode); | |
2e0838fd JK |
1877 | if (sbi->s_partitions) |
1878 | for (i = 0; i < sbi->s_partitions; i++) | |
1879 | udf_free_partition(&sbi->s_partmaps[i]); | |
1da177e4 LT |
1880 | #ifdef CONFIG_UDF_NLS |
1881 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 1882 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
1883 | #endif |
1884 | if (!(sb->s_flags & MS_RDONLY)) | |
1885 | udf_close_lvid(sb); | |
6c79e987 MS |
1886 | brelse(sbi->s_lvid_bh); |
1887 | ||
1888 | kfree(sbi->s_partmaps); | |
1da177e4 LT |
1889 | kfree(sbi); |
1890 | sb->s_fs_info = NULL; | |
28de7948 | 1891 | |
1da177e4 LT |
1892 | return -EINVAL; |
1893 | } | |
1894 | ||
b8145a76 AB |
1895 | static void udf_error(struct super_block *sb, const char *function, |
1896 | const char *fmt, ...) | |
1da177e4 LT |
1897 | { |
1898 | va_list args; | |
1899 | ||
cb00ea35 | 1900 | if (!(sb->s_flags & MS_RDONLY)) { |
1da177e4 LT |
1901 | /* mark sb error */ |
1902 | sb->s_dirt = 1; | |
1903 | } | |
1904 | va_start(args, fmt); | |
4a6e617a | 1905 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 | 1906 | va_end(args); |
3a71fc5d | 1907 | printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n", |
28de7948 | 1908 | sb->s_id, function, error_buf); |
1da177e4 LT |
1909 | } |
1910 | ||
1911 | void udf_warning(struct super_block *sb, const char *function, | |
cb00ea35 | 1912 | const char *fmt, ...) |
1da177e4 LT |
1913 | { |
1914 | va_list args; | |
1915 | ||
cb00ea35 | 1916 | va_start(args, fmt); |
4a6e617a | 1917 | vsnprintf(error_buf, sizeof(error_buf), fmt, args); |
1da177e4 LT |
1918 | va_end(args); |
1919 | printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n", | |
cb00ea35 | 1920 | sb->s_id, function, error_buf); |
1da177e4 LT |
1921 | } |
1922 | ||
cb00ea35 | 1923 | static void udf_put_super(struct super_block *sb) |
1da177e4 LT |
1924 | { |
1925 | int i; | |
6c79e987 | 1926 | struct udf_sb_info *sbi; |
1da177e4 | 1927 | |
6c79e987 MS |
1928 | sbi = UDF_SB(sb); |
1929 | if (sbi->s_vat_inode) | |
1930 | iput(sbi->s_vat_inode); | |
2e0838fd JK |
1931 | if (sbi->s_partitions) |
1932 | for (i = 0; i < sbi->s_partitions; i++) | |
1933 | udf_free_partition(&sbi->s_partmaps[i]); | |
1da177e4 LT |
1934 | #ifdef CONFIG_UDF_NLS |
1935 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) | |
6c79e987 | 1936 | unload_nls(sbi->s_nls_map); |
1da177e4 LT |
1937 | #endif |
1938 | if (!(sb->s_flags & MS_RDONLY)) | |
1939 | udf_close_lvid(sb); | |
6c79e987 MS |
1940 | brelse(sbi->s_lvid_bh); |
1941 | kfree(sbi->s_partmaps); | |
1da177e4 LT |
1942 | kfree(sb->s_fs_info); |
1943 | sb->s_fs_info = NULL; | |
1944 | } | |
1945 | ||
cb00ea35 | 1946 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 1947 | { |
726c3342 | 1948 | struct super_block *sb = dentry->d_sb; |
6c79e987 MS |
1949 | struct udf_sb_info *sbi = UDF_SB(sb); |
1950 | struct logicalVolIntegrityDescImpUse *lvidiu; | |
1951 | ||
1952 | if (sbi->s_lvid_bh != NULL) | |
1953 | lvidiu = udf_sb_lvidiu(sbi); | |
1954 | else | |
1955 | lvidiu = NULL; | |
726c3342 | 1956 | |
1da177e4 LT |
1957 | buf->f_type = UDF_SUPER_MAGIC; |
1958 | buf->f_bsize = sb->s_blocksize; | |
6c79e987 | 1959 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
1da177e4 LT |
1960 | buf->f_bfree = udf_count_free(sb); |
1961 | buf->f_bavail = buf->f_bfree; | |
6c79e987 MS |
1962 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
1963 | le32_to_cpu(lvidiu->numDirs)) : 0) | |
1964 | + buf->f_bfree; | |
1da177e4 LT |
1965 | buf->f_ffree = buf->f_bfree; |
1966 | /* __kernel_fsid_t f_fsid */ | |
cb00ea35 | 1967 | buf->f_namelen = UDF_NAME_LEN - 2; |
1da177e4 LT |
1968 | |
1969 | return 0; | |
1970 | } | |
1971 | ||
4b11111a MS |
1972 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
1973 | struct udf_bitmap *bitmap) | |
1da177e4 LT |
1974 | { |
1975 | struct buffer_head *bh = NULL; | |
1976 | unsigned int accum = 0; | |
1977 | int index; | |
1978 | int block = 0, newblock; | |
1979 | kernel_lb_addr loc; | |
1980 | uint32_t bytes; | |
1da177e4 LT |
1981 | uint8_t *ptr; |
1982 | uint16_t ident; | |
1983 | struct spaceBitmapDesc *bm; | |
1984 | ||
1985 | lock_kernel(); | |
1986 | ||
1987 | loc.logicalBlockNum = bitmap->s_extPosition; | |
6c79e987 | 1988 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
1da177e4 LT |
1989 | bh = udf_read_ptagged(sb, loc, 0, &ident); |
1990 | ||
cb00ea35 | 1991 | if (!bh) { |
1da177e4 LT |
1992 | printk(KERN_ERR "udf: udf_count_free failed\n"); |
1993 | goto out; | |
cb00ea35 | 1994 | } else if (ident != TAG_IDENT_SBD) { |
3bf25cb4 | 1995 | brelse(bh); |
1da177e4 LT |
1996 | printk(KERN_ERR "udf: udf_count_free failed\n"); |
1997 | goto out; | |
1998 | } | |
1999 | ||
2000 | bm = (struct spaceBitmapDesc *)bh->b_data; | |
2001 | bytes = le32_to_cpu(bm->numOfBytes); | |
28de7948 CG |
2002 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
2003 | ptr = (uint8_t *)bh->b_data; | |
1da177e4 | 2004 | |
cb00ea35 | 2005 | while (bytes > 0) { |
01b954a3 MS |
2006 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
2007 | accum += bitmap_weight((const unsigned long *)(ptr + index), | |
2008 | cur_bytes * 8); | |
2009 | bytes -= cur_bytes; | |
cb00ea35 | 2010 | if (bytes) { |
3bf25cb4 | 2011 | brelse(bh); |
1da177e4 LT |
2012 | newblock = udf_get_lb_pblock(sb, loc, ++block); |
2013 | bh = udf_tread(sb, newblock); | |
cb00ea35 | 2014 | if (!bh) { |
1da177e4 LT |
2015 | udf_debug("read failed\n"); |
2016 | goto out; | |
2017 | } | |
2018 | index = 0; | |
28de7948 | 2019 | ptr = (uint8_t *)bh->b_data; |
1da177e4 LT |
2020 | } |
2021 | } | |
3bf25cb4 | 2022 | brelse(bh); |
1da177e4 | 2023 | |
28de7948 | 2024 | out: |
1da177e4 LT |
2025 | unlock_kernel(); |
2026 | ||
2027 | return accum; | |
2028 | } | |
2029 | ||
4b11111a MS |
2030 | static unsigned int udf_count_free_table(struct super_block *sb, |
2031 | struct inode *table) | |
1da177e4 LT |
2032 | { |
2033 | unsigned int accum = 0; | |
ff116fc8 JK |
2034 | uint32_t elen; |
2035 | kernel_lb_addr eloc; | |
1da177e4 | 2036 | int8_t etype; |
ff116fc8 | 2037 | struct extent_position epos; |
1da177e4 LT |
2038 | |
2039 | lock_kernel(); | |
2040 | ||
c0b34438 | 2041 | epos.block = UDF_I(table)->i_location; |
ff116fc8 JK |
2042 | epos.offset = sizeof(struct unallocSpaceEntry); |
2043 | epos.bh = NULL; | |
1da177e4 | 2044 | |
3a71fc5d | 2045 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
1da177e4 | 2046 | accum += (elen >> table->i_sb->s_blocksize_bits); |
3a71fc5d | 2047 | |
3bf25cb4 | 2048 | brelse(epos.bh); |
1da177e4 LT |
2049 | |
2050 | unlock_kernel(); | |
2051 | ||
2052 | return accum; | |
2053 | } | |
cb00ea35 CG |
2054 | |
2055 | static unsigned int udf_count_free(struct super_block *sb) | |
1da177e4 LT |
2056 | { |
2057 | unsigned int accum = 0; | |
6c79e987 MS |
2058 | struct udf_sb_info *sbi; |
2059 | struct udf_part_map *map; | |
1da177e4 | 2060 | |
6c79e987 MS |
2061 | sbi = UDF_SB(sb); |
2062 | if (sbi->s_lvid_bh) { | |
4b11111a MS |
2063 | struct logicalVolIntegrityDesc *lvid = |
2064 | (struct logicalVolIntegrityDesc *) | |
2065 | sbi->s_lvid_bh->b_data; | |
6c79e987 | 2066 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
4b11111a MS |
2067 | accum = le32_to_cpu( |
2068 | lvid->freeSpaceTable[sbi->s_partition]); | |
1da177e4 LT |
2069 | if (accum == 0xFFFFFFFF) |
2070 | accum = 0; | |
2071 | } | |
2072 | } | |
2073 | ||
2074 | if (accum) | |
2075 | return accum; | |
2076 | ||
6c79e987 MS |
2077 | map = &sbi->s_partmaps[sbi->s_partition]; |
2078 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { | |
28de7948 | 2079 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2080 | map->s_uspace.s_bitmap); |
1da177e4 | 2081 | } |
6c79e987 | 2082 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
28de7948 | 2083 | accum += udf_count_free_bitmap(sb, |
6c79e987 | 2084 | map->s_fspace.s_bitmap); |
1da177e4 LT |
2085 | } |
2086 | if (accum) | |
2087 | return accum; | |
2088 | ||
6c79e987 | 2089 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
28de7948 | 2090 | accum += udf_count_free_table(sb, |
6c79e987 | 2091 | map->s_uspace.s_table); |
1da177e4 | 2092 | } |
6c79e987 | 2093 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
28de7948 | 2094 | accum += udf_count_free_table(sb, |
6c79e987 | 2095 | map->s_fspace.s_table); |
1da177e4 LT |
2096 | } |
2097 | ||
2098 | return accum; | |
2099 | } |