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udf: Rename udf_warning to udf_warn
[mirror_ubuntu-hirsute-kernel.git] / fs / udf / super.c
CommitLineData
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>
1da177e4
LT		 51#include <linux/buffer_head.h>
52#include <linux/vfs.h>
53#include <linux/vmalloc.h>
dc5d39be 54#include <linux/errno.h>
6da80894
MS		 55#include <linux/mount.h>
56#include <linux/seq_file.h>
01b954a3 57#include <linux/bitmap.h>
f845fced 58#include <linux/crc-itu-t.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		 78static char error_buf[1024];
79
80/* These are the "meat" - everything else is stuffing */
81static int udf_fill_super(struct super_block *, void *, int);
82static void udf_put_super(struct super_block *);
146bca72 83static int udf_sync_fs(struct super_block *, int);
1da177e4 84static int udf_remount_fs(struct super_block *, int *, char *);
5ca4e4be 85static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
5ca4e4be
PE		 86static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
87 struct kernel_lb_addr *);
cb00ea35 88static void udf_load_fileset(struct super_block *, struct buffer_head *,
5ca4e4be 89 struct kernel_lb_addr *);
1da177e4
LT		 90static void udf_open_lvid(struct super_block *);
91static void udf_close_lvid(struct super_block *);
92static unsigned int udf_count_free(struct super_block *);
726c3342 93static int udf_statfs(struct dentry *, struct kstatfs *);
6da80894 94static int udf_show_options(struct seq_file *, struct vfsmount *);
1da177e4 95
6c79e987
MS		 96struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
97{
4b11111a
MS		 98 struct logicalVolIntegrityDesc *lvid =
99 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
6c79e987 100 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
4b11111a
MS		 101 __u32 offset = number_of_partitions * 2 *
102 sizeof(uint32_t)/sizeof(uint8_t);
6c79e987
MS		 103 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
104}
105
1da177e4 106/* UDF filesystem type */
152a0836
AV		 107static struct dentry *udf_mount(struct file_system_type *fs_type,
108 int flags, const char *dev_name, void *data)
1da177e4 109{
152a0836 110 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
1da177e4
LT		 111}
112
113static struct file_system_type udf_fstype = {
28de7948
CG		 114 .owner = THIS_MODULE,
115 .name = "udf",
152a0836 116 .mount = udf_mount,
28de7948
CG		 117 .kill_sb = kill_block_super,
118 .fs_flags = FS_REQUIRES_DEV,
1da177e4
LT		 119};
120
cb00ea35 121static struct kmem_cache *udf_inode_cachep;
1da177e4
LT		 122
123static struct inode *udf_alloc_inode(struct super_block *sb)
124{
125 struct udf_inode_info *ei;
3a71fc5d 126 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
1da177e4
LT		 127 if (!ei)
128 return NULL;
95f8797f
DB		 129
130 ei->i_unique = 0;
131 ei->i_lenExtents = 0;
132 ei->i_next_alloc_block = 0;
133 ei->i_next_alloc_goal = 0;
134 ei->i_strat4096 = 0;
4d0fb621 135 init_rwsem(&ei->i_data_sem);
95f8797f 136
1da177e4
LT		 137 return &ei->vfs_inode;
138}
139
fa0d7e3d 140static void udf_i_callback(struct rcu_head *head)
1da177e4 141{
fa0d7e3d
NP		 142 struct inode *inode = container_of(head, struct inode, i_rcu);
143 INIT_LIST_HEAD(&inode->i_dentry);
1da177e4
LT		 144 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
145}
146
fa0d7e3d
NP		 147static void udf_destroy_inode(struct inode *inode)
148{
149 call_rcu(&inode->i_rcu, udf_i_callback);
150}
151
51cc5068 152static void init_once(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
160static 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
172static void destroy_inodecache(void)
173{
1a1d92c1 174 kmem_cache_destroy(udf_inode_cachep);
1da177e4
LT		 175}
176
177/* Superblock operations */
ee9b6d61 178static 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,
3aac2b62 182 .evict_inode = udf_evict_inode,
28de7948 183 .put_super = udf_put_super,
146bca72 184 .sync_fs = udf_sync_fs,
28de7948
CG		 185 .statfs = udf_statfs,
186 .remount_fs = udf_remount_fs,
6da80894 187 .show_options = udf_show_options,
1da177e4
LT		 188};
189
cb00ea35 190struct 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;
7ac9bcd5
MS		 204 mode_t fmode;
205 mode_t dmode;
1da177e4
LT		 206 struct nls_table *nls_map;
207};
208
209static int __init init_udf_fs(void)
210{
211 int err;
28de7948 212
1da177e4
LT		 213 err = init_inodecache();
214 if (err)
215 goto out1;
216 err = register_filesystem(&udf_fstype);
217 if (err)
218 goto out;
28de7948 219
1da177e4 220 return 0;
28de7948
CG		 221
222out:
1da177e4 223 destroy_inodecache();
28de7948
CG		 224
225out1:
1da177e4
LT		 226 return err;
227}
228
229static void __exit exit_udf_fs(void)
230{
231 unregister_filesystem(&udf_fstype);
232 destroy_inodecache();
233}
234
235module_init(init_udf_fs)
28de7948 236module_exit(exit_udf_fs)
1da177e4 237
dc5d39be
MS		 238static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
239{
240 struct udf_sb_info *sbi = UDF_SB(sb);
241
242 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
243 GFP_KERNEL);
244 if (!sbi->s_partmaps) {
8076c363
JP		 245 udf_err(sb, "Unable to allocate space for %d partition maps\n",
246 count);
dc5d39be
MS		 247 sbi->s_partitions = 0;
248 return -ENOMEM;
249 }
250
251 sbi->s_partitions = count;
252 return 0;
253}
254
6da80894
MS		 255static 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");
1197e4df 262 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
6da80894
MS		 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);
87bc730c 286 if (sbi->s_fmode != UDF_INVALID_MODE)
7ac9bcd5 287 seq_printf(seq, ",mode=%o", sbi->s_fmode);
87bc730c 288 if (sbi->s_dmode != UDF_INVALID_MODE)
7ac9bcd5 289 seq_printf(seq, ",dmode=%o", sbi->s_dmode);
6da80894
MS		 290 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
291 seq_printf(seq, ",session=%u", sbi->s_session);
292 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
293 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
40346005
JK		 294 if (sbi->s_anchor != 0)
295 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
6da80894
MS		 296 /*
297 * volume, partition, fileset and rootdir seem to be ignored
298 * currently
299 */
300 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
301 seq_puts(seq, ",utf8");
302 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
303 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
304
305 return 0;
306}
307
1da177e4
LT		 308/*
309 * udf_parse_options
310 *
311 * PURPOSE
312 * Parse mount options.
313 *
314 * DESCRIPTION
315 * The following mount options are supported:
316 *
317 * gid= Set the default group.
318 * umask= Set the default umask.
7ac9bcd5
MS		 319 * mode= Set the default file permissions.
320 * dmode= Set the default directory permissions.
1da177e4
LT		 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		 364enum {
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,
7ac9bcd5
MS		 370 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
371 Opt_fmode, Opt_dmode
1da177e4
LT		 372};
373
a447c093 374static const match_table_t tokens = {
28de7948
CG		 375 {Opt_novrs, "novrs"},
376 {Opt_nostrict, "nostrict"},
377 {Opt_bs, "bs=%u"},
378 {Opt_unhide, "unhide"},
379 {Opt_undelete, "undelete"},
380 {Opt_noadinicb, "noadinicb"},
381 {Opt_adinicb, "adinicb"},
382 {Opt_shortad, "shortad"},
383 {Opt_longad, "longad"},
384 {Opt_uforget, "uid=forget"},
385 {Opt_uignore, "uid=ignore"},
386 {Opt_gforget, "gid=forget"},
387 {Opt_gignore, "gid=ignore"},
388 {Opt_gid, "gid=%u"},
389 {Opt_uid, "uid=%u"},
390 {Opt_umask, "umask=%o"},
391 {Opt_session, "session=%u"},
392 {Opt_lastblock, "lastblock=%u"},
393 {Opt_anchor, "anchor=%u"},
394 {Opt_volume, "volume=%u"},
395 {Opt_partition, "partition=%u"},
396 {Opt_fileset, "fileset=%u"},
397 {Opt_rootdir, "rootdir=%u"},
398 {Opt_utf8, "utf8"},
399 {Opt_iocharset, "iocharset=%s"},
7ac9bcd5
MS		 400 {Opt_fmode, "mode=%o"},
401 {Opt_dmode, "dmode=%o"},
28de7948 402 {Opt_err, NULL}
1da177e4
LT		 403};
404
6da80894
MS		 405static int udf_parse_options(char *options, struct udf_options *uopt,
406 bool remount)
1da177e4
LT		 407{
408 char *p;
409 int option;
410
411 uopt->novrs = 0;
1da177e4
LT		 412 uopt->partition = 0xFFFF;
413 uopt->session = 0xFFFFFFFF;
414 uopt->lastblock = 0;
415 uopt->anchor = 0;
416 uopt->volume = 0xFFFFFFFF;
417 uopt->rootdir = 0xFFFFFFFF;
418 uopt->fileset = 0xFFFFFFFF;
419 uopt->nls_map = NULL;
420
421 if (!options)
422 return 1;
423
cb00ea35 424 while ((p = strsep(&options, ",")) != NULL) {
1da177e4
LT		 425 substring_t args[MAX_OPT_ARGS];
426 int token;
427 if (!*p)
428 continue;
429
430 token = match_token(p, tokens, args);
cb00ea35
CG		 431 switch (token) {
432 case Opt_novrs:
433 uopt->novrs = 1;
4136801a 434 break;
cb00ea35
CG		 435 case Opt_bs:
436 if (match_int(&args[0], &option))
437 return 0;
438 uopt->blocksize = option;
1197e4df 439 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
cb00ea35
CG		 440 break;
441 case Opt_unhide:
442 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
443 break;
444 case Opt_undelete:
445 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
446 break;
447 case Opt_noadinicb:
448 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
449 break;
450 case Opt_adinicb:
451 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
452 break;
453 case Opt_shortad:
454 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
455 break;
456 case Opt_longad:
457 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
458 break;
459 case Opt_gid:
460 if (match_int(args, &option))
461 return 0;
462 uopt->gid = option;
ca76d2d8 463 uopt->flags |= (1 << UDF_FLAG_GID_SET);
cb00ea35
CG		 464 break;
465 case Opt_uid:
466 if (match_int(args, &option))
467 return 0;
468 uopt->uid = option;
ca76d2d8 469 uopt->flags |= (1 << UDF_FLAG_UID_SET);
cb00ea35
CG		 470 break;
471 case Opt_umask:
472 if (match_octal(args, &option))
473 return 0;
474 uopt->umask = option;
475 break;
476 case Opt_nostrict:
477 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
478 break;
479 case Opt_session:
480 if (match_int(args, &option))
481 return 0;
482 uopt->session = option;
6da80894
MS		 483 if (!remount)
484 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
cb00ea35
CG		 485 break;
486 case Opt_lastblock:
487 if (match_int(args, &option))
488 return 0;
489 uopt->lastblock = option;
6da80894
MS		 490 if (!remount)
491 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
cb00ea35
CG		 492 break;
493 case Opt_anchor:
494 if (match_int(args, &option))
495 return 0;
496 uopt->anchor = option;
497 break;
498 case Opt_volume:
499 if (match_int(args, &option))
500 return 0;
501 uopt->volume = option;
502 break;
503 case Opt_partition:
504 if (match_int(args, &option))
505 return 0;
506 uopt->partition = option;
507 break;
508 case Opt_fileset:
509 if (match_int(args, &option))
510 return 0;
511 uopt->fileset = option;
512 break;
513 case Opt_rootdir:
514 if (match_int(args, &option))
515 return 0;
516 uopt->rootdir = option;
517 break;
518 case Opt_utf8:
519 uopt->flags |= (1 << UDF_FLAG_UTF8);
520 break;
1da177e4 521#ifdef CONFIG_UDF_NLS
cb00ea35
CG		 522 case Opt_iocharset:
523 uopt->nls_map = load_nls(args[0].from);
524 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
525 break;
1da177e4 526#endif
cb00ea35
CG		 527 case Opt_uignore:
528 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
529 break;
530 case Opt_uforget:
531 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
532 break;
533 case Opt_gignore:
534 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
535 break;
536 case Opt_gforget:
537 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
538 break;
7ac9bcd5
MS		 539 case Opt_fmode:
540 if (match_octal(args, &option))
541 return 0;
542 uopt->fmode = option & 0777;
543 break;
544 case Opt_dmode:
545 if (match_octal(args, &option))
546 return 0;
547 uopt->dmode = option & 0777;
548 break;
cb00ea35
CG		 549 default:
550 printk(KERN_ERR "udf: bad mount option \"%s\" "
551 "or missing value\n", p);
1da177e4
LT		 552 return 0;
553 }
554 }
555 return 1;
556}
557
cb00ea35 558static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
1da177e4
LT		 559{
560 struct udf_options uopt;
6c79e987 561 struct udf_sb_info *sbi = UDF_SB(sb);
c79d967d 562 int error = 0;
1da177e4 563
6c79e987
MS		 564 uopt.flags = sbi->s_flags;
565 uopt.uid = sbi->s_uid;
566 uopt.gid = sbi->s_gid;
567 uopt.umask = sbi->s_umask;
7ac9bcd5
MS		 568 uopt.fmode = sbi->s_fmode;
569 uopt.dmode = sbi->s_dmode;
1da177e4 570
6da80894 571 if (!udf_parse_options(options, &uopt, true))
1da177e4
LT		 572 return -EINVAL;
573
c03cad24 574 write_lock(&sbi->s_cred_lock);
6c79e987
MS		 575 sbi->s_flags = uopt.flags;
576 sbi->s_uid = uopt.uid;
577 sbi->s_gid = uopt.gid;
578 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 579 sbi->s_fmode = uopt.fmode;
580 sbi->s_dmode = uopt.dmode;
c03cad24 581 write_unlock(&sbi->s_cred_lock);
1da177e4 582
6c79e987
MS		 583 if (sbi->s_lvid_bh) {
584 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
1da177e4
LT		 585 if (write_rev > UDF_MAX_WRITE_VERSION)
586 *flags |= MS_RDONLY;
587 }
588
c79d967d
CH		 589 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
590 goto out_unlock;
591
36350462 592 if (*flags & MS_RDONLY)
1da177e4 593 udf_close_lvid(sb);
36350462 594 else
1da177e4
LT		 595 udf_open_lvid(sb);
596
c79d967d 597out_unlock:
c79d967d 598 return error;
1da177e4
LT		 599}
600
40346005
JK		 601/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
602/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
603static loff_t udf_check_vsd(struct super_block *sb)
1da177e4
LT		 604{
605 struct volStructDesc *vsd = NULL;
f4bcbbd9 606 loff_t sector = 32768;
1da177e4
LT		 607 int sectorsize;
608 struct buffer_head *bh = NULL;
cb00ea35
CG		 609 int nsr02 = 0;
610 int nsr03 = 0;
6c79e987 611 struct udf_sb_info *sbi;
1da177e4 612
6c79e987 613 sbi = UDF_SB(sb);
1da177e4
LT		 614 if (sb->s_blocksize < sizeof(struct volStructDesc))
615 sectorsize = sizeof(struct volStructDesc);
616 else
617 sectorsize = sb->s_blocksize;
618
6c79e987 619 sector += (sbi->s_session << sb->s_blocksize_bits);
1da177e4
LT		 620
621 udf_debug("Starting at sector %u (%ld byte sectors)\n",
706047a7
SM		 622 (unsigned int)(sector >> sb->s_blocksize_bits),
623 sb->s_blocksize);
1da177e4 624 /* Process the sequence (if applicable) */
cb00ea35 625 for (; !nsr02 && !nsr03; sector += sectorsize) {
1da177e4
LT		 626 /* Read a block */
627 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
628 if (!bh)
629 break;
630
631 /* Look for ISO descriptors */
632 vsd = (struct volStructDesc *)(bh->b_data +
3a71fc5d 633 (sector & (sb->s_blocksize - 1)));
1da177e4 634
cb00ea35 635 if (vsd->stdIdent[0] == 0) {
3bf25cb4 636 brelse(bh);
1da177e4 637 break;
3a71fc5d
MS		 638 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
639 VSD_STD_ID_LEN)) {
cb00ea35
CG		 640 switch (vsd->structType) {
641 case 0:
642 udf_debug("ISO9660 Boot Record found\n");
643 break;
644 case 1:
3a71fc5d
MS		 645 udf_debug("ISO9660 Primary Volume Descriptor "
646 "found\n");
cb00ea35
CG		 647 break;
648 case 2:
3a71fc5d
MS		 649 udf_debug("ISO9660 Supplementary Volume "
650 "Descriptor found\n");
cb00ea35
CG		 651 break;
652 case 3:
3a71fc5d
MS		 653 udf_debug("ISO9660 Volume Partition Descriptor "
654 "found\n");
cb00ea35
CG		 655 break;
656 case 255:
3a71fc5d
MS		 657 udf_debug("ISO9660 Volume Descriptor Set "
658 "Terminator found\n");
cb00ea35
CG		 659 break;
660 default:
661 udf_debug("ISO9660 VRS (%u) found\n",
662 vsd->structType);
663 break;
1da177e4 664 }
3a71fc5d
MS		 665 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
666 VSD_STD_ID_LEN))
667 ; /* nothing */
668 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
669 VSD_STD_ID_LEN)) {
3bf25cb4 670 brelse(bh);
1da177e4 671 break;
3a71fc5d
MS		 672 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
673 VSD_STD_ID_LEN))
1da177e4 674 nsr02 = sector;
3a71fc5d
MS		 675 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
676 VSD_STD_ID_LEN))
1da177e4 677 nsr03 = sector;
3bf25cb4 678 brelse(bh);
1da177e4
LT		 679 }
680
681 if (nsr03)
682 return nsr03;
683 else if (nsr02)
684 return nsr02;
6c79e987 685 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
1da177e4
LT		 686 return -1;
687 else
688 return 0;
689}
690
3a71fc5d 691static int udf_find_fileset(struct super_block *sb,
5ca4e4be
PE		 692 struct kernel_lb_addr *fileset,
693 struct kernel_lb_addr *root)
1da177e4
LT		 694{
695 struct buffer_head *bh = NULL;
696 long lastblock;
697 uint16_t ident;
6c79e987 698 struct udf_sb_info *sbi;
1da177e4
LT		 699
700 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 701 fileset->partitionReferenceNum != 0xFFFF) {
97e961fd 702 bh = udf_read_ptagged(sb, fileset, 0, &ident);
1da177e4 703
28de7948 704 if (!bh) {
1da177e4 705 return 1;
28de7948 706 } else if (ident != TAG_IDENT_FSD) {
3bf25cb4 707 brelse(bh);
1da177e4
LT		 708 return 1;
709 }
cb00ea35 710
1da177e4
LT		 711 }
712
6c79e987 713 sbi = UDF_SB(sb);
3a71fc5d
MS		 714 if (!bh) {
715 /* Search backwards through the partitions */
5ca4e4be 716 struct kernel_lb_addr newfileset;
1da177e4 717
28de7948 718/* --> cvg: FIXME - is it reasonable? */
1da177e4 719 return 1;
cb00ea35 720
6c79e987 721 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
cb00ea35
CG		 722 (newfileset.partitionReferenceNum != 0xFFFF &&
723 fileset->logicalBlockNum == 0xFFFFFFFF &&
724 fileset->partitionReferenceNum == 0xFFFF);
725 newfileset.partitionReferenceNum--) {
6c79e987
MS		 726 lastblock = sbi->s_partmaps
727 [newfileset.partitionReferenceNum]
728 .s_partition_len;
1da177e4
LT		 729 newfileset.logicalBlockNum = 0;
730
cb00ea35 731 do {
97e961fd 732 bh = udf_read_ptagged(sb, &newfileset, 0,
3a71fc5d 733 &ident);
cb00ea35
CG		 734 if (!bh) {
735 newfileset.logicalBlockNum++;
1da177e4
LT		 736 continue;
737 }
738
cb00ea35
CG		 739 switch (ident) {
740 case TAG_IDENT_SBD:
28de7948
CG		 741 {
742 struct spaceBitmapDesc *sp;
4b11111a
MS		 743 sp = (struct spaceBitmapDesc *)
744 bh->b_data;
28de7948
CG		 745 newfileset.logicalBlockNum += 1 +
746 ((le32_to_cpu(sp->numOfBytes) +
4b11111a
MS		 747 sizeof(struct spaceBitmapDesc)
748 - 1) >> sb->s_blocksize_bits);
28de7948
CG		 749 brelse(bh);
750 break;
751 }
cb00ea35 752 case TAG_IDENT_FSD:
28de7948
CG		 753 *fileset = newfileset;
754 break;
cb00ea35 755 default:
28de7948
CG		 756 newfileset.logicalBlockNum++;
757 brelse(bh);
758 bh = NULL;
759 break;
1da177e4 760 }
28de7948
CG		 761 } while (newfileset.logicalBlockNum < lastblock &&
762 fileset->logicalBlockNum == 0xFFFFFFFF &&
763 fileset->partitionReferenceNum == 0xFFFF);
1da177e4
LT		 764 }
765 }
766
767 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 768 fileset->partitionReferenceNum != 0xFFFF) && bh) {
1da177e4 769 udf_debug("Fileset at block=%d, partition=%d\n",
cb00ea35
CG		 770 fileset->logicalBlockNum,
771 fileset->partitionReferenceNum);
1da177e4 772
6c79e987 773 sbi->s_partition = fileset->partitionReferenceNum;
1da177e4 774 udf_load_fileset(sb, bh, root);
3bf25cb4 775 brelse(bh);
1da177e4
LT		 776 return 0;
777 }
778 return 1;
779}
780
c0eb31ed 781static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
1da177e4
LT		 782{
783 struct primaryVolDesc *pvoldesc;
ba9aadd8 784 struct ustr *instr, *outstr;
c0eb31ed
JK		 785 struct buffer_head *bh;
786 uint16_t ident;
ba9aadd8
MS		 787 int ret = 1;
788
789 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
790 if (!instr)
791 return 1;
792
793 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
794 if (!outstr)
795 goto out1;
c0eb31ed
JK		 796
797 bh = udf_read_tagged(sb, block, block, &ident);
798 if (!bh)
ba9aadd8
MS		 799 goto out2;
800
c0eb31ed 801 BUG_ON(ident != TAG_IDENT_PVD);
1da177e4
LT		 802
803 pvoldesc = (struct primaryVolDesc *)bh->b_data;
804
56774805
MS		 805 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
806 pvoldesc->recordingDateAndTime)) {
af15a298 807#ifdef UDFFS_DEBUG
5ca4e4be 808 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
cbf5676a 809 udf_debug("recording time %04u/%02u/%02u"
3a71fc5d 810 " %02u:%02u (%x)\n",
af15a298
MS		 811 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
812 ts->minute, le16_to_cpu(ts->typeAndTimezone));
813#endif
1da177e4
LT		 814 }
815
ba9aadd8
MS		 816 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
817 if (udf_CS0toUTF8(outstr, instr)) {
818 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
819 outstr->u_len > 31 ? 31 : outstr->u_len);
4b11111a
MS		 820 udf_debug("volIdent[] = '%s'\n",
821 UDF_SB(sb)->s_volume_ident);
1da177e4 822 }
1da177e4 823
ba9aadd8
MS		 824 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
825 if (udf_CS0toUTF8(outstr, instr))
826 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
c0eb31ed
JK		 827
828 brelse(bh);
ba9aadd8
MS		 829 ret = 0;
830out2:
831 kfree(outstr);
832out1:
833 kfree(instr);
834 return ret;
1da177e4
LT		 835}
836
bfb257a5
JK		 837static int udf_load_metadata_files(struct super_block *sb, int partition)
838{
839 struct udf_sb_info *sbi = UDF_SB(sb);
840 struct udf_part_map *map;
841 struct udf_meta_data *mdata;
5ca4e4be 842 struct kernel_lb_addr addr;
bfb257a5
JK		 843 int fe_error = 0;
844
845 map = &sbi->s_partmaps[partition];
846 mdata = &map->s_type_specific.s_metadata;
847
848 /* metadata address */
849 addr.logicalBlockNum = mdata->s_meta_file_loc;
850 addr.partitionReferenceNum = map->s_partition_num;
851
852 udf_debug("Metadata file location: block = %d part = %d\n",
853 addr.logicalBlockNum, addr.partitionReferenceNum);
854
97e961fd 855 mdata->s_metadata_fe = udf_iget(sb, &addr);
bfb257a5
JK		 856
857 if (mdata->s_metadata_fe == NULL) {
a40ecd7b 858 udf_warn(sb, "metadata inode efe not found, will try mirror inode\n");
bfb257a5
JK		 859 fe_error = 1;
860 } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type !=
861 ICBTAG_FLAG_AD_SHORT) {
a40ecd7b 862 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
bfb257a5
JK		 863 fe_error = 1;
864 iput(mdata->s_metadata_fe);
865 mdata->s_metadata_fe = NULL;
866 }
867
868 /* mirror file entry */
869 addr.logicalBlockNum = mdata->s_mirror_file_loc;
870 addr.partitionReferenceNum = map->s_partition_num;
871
872 udf_debug("Mirror metadata file location: block = %d part = %d\n",
873 addr.logicalBlockNum, addr.partitionReferenceNum);
874
97e961fd 875 mdata->s_mirror_fe = udf_iget(sb, &addr);
bfb257a5
JK		 876
877 if (mdata->s_mirror_fe == NULL) {
878 if (fe_error) {
8076c363 879 udf_err(sb, "mirror inode efe not found and metadata inode is missing too, exiting...\n");
bfb257a5
JK		 880 goto error_exit;
881 } else
a40ecd7b 882 udf_warn(sb, "mirror inode efe not found, but metadata inode is OK\n");
bfb257a5
JK		 883 } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type !=
884 ICBTAG_FLAG_AD_SHORT) {
a40ecd7b 885 udf_warn(sb, "mirror inode efe does not have short allocation descriptors!\n");
bfb257a5
JK		 886 iput(mdata->s_mirror_fe);
887 mdata->s_mirror_fe = NULL;
888 if (fe_error)
889 goto error_exit;
890 }
891
892 /*
893 * bitmap file entry
894 * Note:
895 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
896 */
897 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
898 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
899 addr.partitionReferenceNum = map->s_partition_num;
900
901 udf_debug("Bitmap file location: block = %d part = %d\n",
902 addr.logicalBlockNum, addr.partitionReferenceNum);
903
97e961fd 904 mdata->s_bitmap_fe = udf_iget(sb, &addr);
bfb257a5
JK		 905
906 if (mdata->s_bitmap_fe == NULL) {
907 if (sb->s_flags & MS_RDONLY)
a40ecd7b 908 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
bfb257a5 909 else {
8076c363 910 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
bfb257a5
JK		 911 goto error_exit;
912 }
913 }
914 }
915
916 udf_debug("udf_load_metadata_files Ok\n");
917
918 return 0;
919
920error_exit:
921 return 1;
922}
923
28de7948 924static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
5ca4e4be 925 struct kernel_lb_addr *root)
1da177e4
LT		 926{
927 struct fileSetDesc *fset;
928
929 fset = (struct fileSetDesc *)bh->b_data;
930
931 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
932
6c79e987 933 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1da177e4 934
cb00ea35
CG		 935 udf_debug("Rootdir at block=%d, partition=%d\n",
936 root->logicalBlockNum, root->partitionReferenceNum);
1da177e4
LT		 937}
938
883cb9d1
MS		 939int udf_compute_nr_groups(struct super_block *sb, u32 partition)
940{
941 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
8dee00bb
JL		 942 return DIV_ROUND_UP(map->s_partition_len +
943 (sizeof(struct spaceBitmapDesc) << 3),
944 sb->s_blocksize * 8);
883cb9d1
MS		 945}
946
66e1da3f
MS		 947static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
948{
66e1da3f
MS		 949 struct udf_bitmap *bitmap;
950 int nr_groups;
951 int size;
952
883cb9d1 953 nr_groups = udf_compute_nr_groups(sb, index);
66e1da3f
MS		 954 size = sizeof(struct udf_bitmap) +
955 (sizeof(struct buffer_head *) * nr_groups);
956
957 if (size <= PAGE_SIZE)
ed2ae6f6 958 bitmap = kzalloc(size, GFP_KERNEL);
66e1da3f 959 else
ed2ae6f6 960 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
66e1da3f
MS		 961
962 if (bitmap == NULL) {
8076c363
JP		 963 udf_err(sb, "Unable to allocate space for bitmap and %d buffer_head pointers\n",
964 nr_groups);
66e1da3f
MS		 965 return NULL;
966 }
967
66e1da3f
MS		 968 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
969 bitmap->s_nr_groups = nr_groups;
970 return bitmap;
971}
972
3fb38dfa
JK		 973static int udf_fill_partdesc_info(struct super_block *sb,
974 struct partitionDesc *p, int p_index)
1da177e4 975{
6c79e987 976 struct udf_part_map *map;
165923fa 977 struct udf_sb_info *sbi = UDF_SB(sb);
3fb38dfa 978 struct partitionHeaderDesc *phd;
165923fa 979
3fb38dfa 980 map = &sbi->s_partmaps[p_index];
165923fa
MS		 981
982 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
983 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
984
985 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
986 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
987 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
988 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
989 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
990 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
991 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
992 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
993
706047a7
SM		 994 udf_debug("Partition (%d type %x) starts at physical %d, "
995 "block length %d\n", p_index,
165923fa
MS		 996 map->s_partition_type, map->s_partition_root,
997 map->s_partition_len);
998
999 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1000 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
3fb38dfa 1001 return 0;
165923fa
MS		 1002
1003 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1004 if (phd->unallocSpaceTable.extLength) {
5ca4e4be 1005 struct kernel_lb_addr loc = {
165923fa
MS		 1006 .logicalBlockNum = le32_to_cpu(
1007 phd->unallocSpaceTable.extPosition),
3fb38dfa 1008 .partitionReferenceNum = p_index,
165923fa
MS		 1009 };
1010
97e961fd 1011 map->s_uspace.s_table = udf_iget(sb, &loc);
165923fa
MS		 1012 if (!map->s_uspace.s_table) {
1013 udf_debug("cannot load unallocSpaceTable (part %d)\n",
3fb38dfa
JK		 1014 p_index);
1015 return 1;
165923fa
MS		 1016 }
1017 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1018 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
3fb38dfa 1019 p_index, map->s_uspace.s_table->i_ino);
165923fa
MS		 1020 }
1021
1022 if (phd->unallocSpaceBitmap.extLength) {
3fb38dfa
JK		 1023 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1024 if (!bitmap)
1025 return 1;
165923fa 1026 map->s_uspace.s_bitmap = bitmap;
2e0838fd 1027 bitmap->s_extLength = le32_to_cpu(
165923fa 1028 phd->unallocSpaceBitmap.extLength);
2e0838fd 1029 bitmap->s_extPosition = le32_to_cpu(
165923fa 1030 phd->unallocSpaceBitmap.extPosition);
2e0838fd 1031 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
3fb38dfa 1032 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
2e0838fd 1033 bitmap->s_extPosition);
165923fa
MS		 1034 }
1035
1036 if (phd->partitionIntegrityTable.extLength)
3fb38dfa 1037 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
165923fa
MS		 1038
1039 if (phd->freedSpaceTable.extLength) {
5ca4e4be 1040 struct kernel_lb_addr loc = {
165923fa
MS		 1041 .logicalBlockNum = le32_to_cpu(
1042 phd->freedSpaceTable.extPosition),
3fb38dfa 1043 .partitionReferenceNum = p_index,
165923fa
MS		 1044 };
1045
97e961fd 1046 map->s_fspace.s_table = udf_iget(sb, &loc);
165923fa 1047 if (!map->s_fspace.s_table) {
3fb38dfa
JK		 1048 udf_debug("cannot load freedSpaceTable (part %d)\n",
1049 p_index);
1050 return 1;
165923fa
MS		 1051 }
1052
1053 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1054 udf_debug("freedSpaceTable (part %d) @ %ld\n",
3fb38dfa 1055 p_index, map->s_fspace.s_table->i_ino);
165923fa
MS		 1056 }
1057
1058 if (phd->freedSpaceBitmap.extLength) {
3fb38dfa
JK		 1059 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1060 if (!bitmap)
1061 return 1;
165923fa 1062 map->s_fspace.s_bitmap = bitmap;
2e0838fd 1063 bitmap->s_extLength = le32_to_cpu(
165923fa 1064 phd->freedSpaceBitmap.extLength);
2e0838fd 1065 bitmap->s_extPosition = le32_to_cpu(
165923fa 1066 phd->freedSpaceBitmap.extPosition);
2e0838fd 1067 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
3fb38dfa 1068 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
2e0838fd 1069 bitmap->s_extPosition);
165923fa 1070 }
3fb38dfa
JK		 1071 return 0;
1072}
1073
e971b0b9
JK		 1074static void udf_find_vat_block(struct super_block *sb, int p_index,
1075 int type1_index, sector_t start_block)
38b74a53
JK		 1076{
1077 struct udf_sb_info *sbi = UDF_SB(sb);
1078 struct udf_part_map *map = &sbi->s_partmaps[p_index];
e971b0b9 1079 sector_t vat_block;
5ca4e4be 1080 struct kernel_lb_addr ino;
e971b0b9
JK		 1081
1082 /*
1083 * VAT file entry is in the last recorded block. Some broken disks have
1084 * it a few blocks before so try a bit harder...
1085 */
1086 ino.partitionReferenceNum = type1_index;
1087 for (vat_block = start_block;
1088 vat_block >= map->s_partition_root &&
1089 vat_block >= start_block - 3 &&
1090 !sbi->s_vat_inode; vat_block--) {
1091 ino.logicalBlockNum = vat_block - map->s_partition_root;
1092 sbi->s_vat_inode = udf_iget(sb, &ino);
1093 }
1094}
1095
1096static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1097{
1098 struct udf_sb_info *sbi = UDF_SB(sb);
1099 struct udf_part_map *map = &sbi->s_partmaps[p_index];
fa5e0815
JK		 1100 struct buffer_head *bh = NULL;
1101 struct udf_inode_info *vati;
1102 uint32_t pos;
1103 struct virtualAllocationTable20 *vat20;
4bf17af0 1104 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
38b74a53 1105
e971b0b9 1106 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
4bf17af0
JK		 1107 if (!sbi->s_vat_inode &&
1108 sbi->s_last_block != blocks - 1) {
1109 printk(KERN_NOTICE "UDF-fs: Failed to read VAT inode from the"
1110 " last recorded block (%lu), retrying with the last "
1111 "block of the device (%lu).\n",
1112 (unsigned long)sbi->s_last_block,
1113 (unsigned long)blocks - 1);
e971b0b9 1114 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
4bf17af0 1115 }
38b74a53
JK		 1116 if (!sbi->s_vat_inode)
1117 return 1;
1118
1119 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
47c9358a 1120 map->s_type_specific.s_virtual.s_start_offset = 0;
38b74a53
JK		 1121 map->s_type_specific.s_virtual.s_num_entries =
1122 (sbi->s_vat_inode->i_size - 36) >> 2;
1123 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
fa5e0815
JK		 1124 vati = UDF_I(sbi->s_vat_inode);
1125 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1126 pos = udf_block_map(sbi->s_vat_inode, 0);
1127 bh = sb_bread(sb, pos);
1128 if (!bh)
1129 return 1;
1130 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1131 } else {
1132 vat20 = (struct virtualAllocationTable20 *)
1133 vati->i_ext.i_data;
1134 }
38b74a53 1135
38b74a53 1136 map->s_type_specific.s_virtual.s_start_offset =
47c9358a 1137 le16_to_cpu(vat20->lengthHeader);
38b74a53
JK		 1138 map->s_type_specific.s_virtual.s_num_entries =
1139 (sbi->s_vat_inode->i_size -
1140 map->s_type_specific.s_virtual.
1141 s_start_offset) >> 2;
1142 brelse(bh);
1143 }
1144 return 0;
1145}
1146
3fb38dfa
JK		 1147static int udf_load_partdesc(struct super_block *sb, sector_t block)
1148{
1149 struct buffer_head *bh;
1150 struct partitionDesc *p;
1151 struct udf_part_map *map;
1152 struct udf_sb_info *sbi = UDF_SB(sb);
38b74a53 1153 int i, type1_idx;
3fb38dfa
JK		 1154 uint16_t partitionNumber;
1155 uint16_t ident;
1156 int ret = 0;
1157
1158 bh = udf_read_tagged(sb, block, block, &ident);
1159 if (!bh)
1160 return 1;
1161 if (ident != TAG_IDENT_PD)
1162 goto out_bh;
1163
1164 p = (struct partitionDesc *)bh->b_data;
1165 partitionNumber = le16_to_cpu(p->partitionNumber);
38b74a53 1166
bfb257a5 1167 /* First scan for TYPE1, SPARABLE and METADATA partitions */
3fb38dfa
JK		 1168 for (i = 0; i < sbi->s_partitions; i++) {
1169 map = &sbi->s_partmaps[i];
1170 udf_debug("Searching map: (%d == %d)\n",
1171 map->s_partition_num, partitionNumber);
38b74a53
JK		 1172 if (map->s_partition_num == partitionNumber &&
1173 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1174 map->s_partition_type == UDF_SPARABLE_MAP15))
3fb38dfa
JK		 1175 break;
1176 }
1177
38b74a53 1178 if (i >= sbi->s_partitions) {
3fb38dfa
JK		 1179 udf_debug("Partition (%d) not found in partition map\n",
1180 partitionNumber);
1181 goto out_bh;
1182 }
165923fa 1183
3fb38dfa 1184 ret = udf_fill_partdesc_info(sb, p, i);
38b74a53
JK		 1185
1186 /*
bfb257a5
JK		 1187 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1188 * PHYSICAL partitions are already set up
38b74a53
JK		 1189 */
1190 type1_idx = i;
1191 for (i = 0; i < sbi->s_partitions; i++) {
1192 map = &sbi->s_partmaps[i];
1193
1194 if (map->s_partition_num == partitionNumber &&
1195 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
bfb257a5
JK		 1196 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1197 map->s_partition_type == UDF_METADATA_MAP25))
38b74a53
JK		 1198 break;
1199 }
1200
1201 if (i >= sbi->s_partitions)
1202 goto out_bh;
1203
1204 ret = udf_fill_partdesc_info(sb, p, i);
1205 if (ret)
1206 goto out_bh;
1207
bfb257a5
JK		 1208 if (map->s_partition_type == UDF_METADATA_MAP25) {
1209 ret = udf_load_metadata_files(sb, i);
1210 if (ret) {
1211 printk(KERN_ERR "UDF-fs: error loading MetaData "
1212 "partition map %d\n", i);
1213 goto out_bh;
1214 }
1215 } else {
1216 ret = udf_load_vat(sb, i, type1_idx);
1217 if (ret)
1218 goto out_bh;
1219 /*
1220 * Mark filesystem read-only if we have a partition with
1221 * virtual map since we don't handle writing to it (we
1222 * overwrite blocks instead of relocating them).
1223 */
1224 sb->s_flags |= MS_RDONLY;
1225 printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only "
1226 "because writing to pseudooverwrite partition is "
1227 "not implemented.\n");
1228 }
c0eb31ed 1229out_bh:
2e0838fd 1230 /* In case loading failed, we handle cleanup in udf_fill_super */
c0eb31ed
JK		 1231 brelse(bh);
1232 return ret;
1da177e4
LT		 1233}
1234
c0eb31ed 1235static int udf_load_logicalvol(struct super_block *sb, sector_t block,
5ca4e4be 1236 struct kernel_lb_addr *fileset)
1da177e4
LT		 1237{
1238 struct logicalVolDesc *lvd;
1239 int i, j, offset;
1240 uint8_t type;
6c79e987 1241 struct udf_sb_info *sbi = UDF_SB(sb);
4b11111a 1242 struct genericPartitionMap *gpm;
c0eb31ed
JK		 1243 uint16_t ident;
1244 struct buffer_head *bh;
1245 int ret = 0;
1da177e4 1246
c0eb31ed
JK		 1247 bh = udf_read_tagged(sb, block, block, &ident);
1248 if (!bh)
1249 return 1;
1250 BUG_ON(ident != TAG_IDENT_LVD);
1da177e4
LT		 1251 lvd = (struct logicalVolDesc *)bh->b_data;
1252
dc5d39be 1253 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
c0eb31ed
JK		 1254 if (i != 0) {
1255 ret = i;
1256 goto out_bh;
1257 }
1da177e4 1258
cb00ea35 1259 for (i = 0, offset = 0;
6c79e987 1260 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
4b11111a
MS		 1261 i++, offset += gpm->partitionMapLength) {
1262 struct udf_part_map *map = &sbi->s_partmaps[i];
1263 gpm = (struct genericPartitionMap *)
1264 &(lvd->partitionMaps[offset]);
1265 type = gpm->partitionMapType;
cb00ea35 1266 if (type == 1) {
4b11111a
MS		 1267 struct genericPartitionMap1 *gpm1 =
1268 (struct genericPartitionMap1 *)gpm;
6c79e987
MS		 1269 map->s_partition_type = UDF_TYPE1_MAP15;
1270 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1271 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1272 map->s_partition_func = NULL;
cb00ea35 1273 } else if (type == 2) {
4b11111a
MS		 1274 struct udfPartitionMap2 *upm2 =
1275 (struct udfPartitionMap2 *)gpm;
1276 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1277 strlen(UDF_ID_VIRTUAL))) {
1278 u16 suf =
1279 le16_to_cpu(((__le16 *)upm2->partIdent.
1280 identSuffix)[0]);
c82a1275 1281 if (suf < 0x0200) {
4b11111a
MS		 1282 map->s_partition_type =
1283 UDF_VIRTUAL_MAP15;
1284 map->s_partition_func =
1285 udf_get_pblock_virt15;
c82a1275 1286 } else {
4b11111a
MS		 1287 map->s_partition_type =
1288 UDF_VIRTUAL_MAP20;
1289 map->s_partition_func =
1290 udf_get_pblock_virt20;
1da177e4 1291 }
4b11111a
MS		 1292 } else if (!strncmp(upm2->partIdent.ident,
1293 UDF_ID_SPARABLE,
1294 strlen(UDF_ID_SPARABLE))) {
1da177e4 1295 uint32_t loc;
1da177e4 1296 struct sparingTable *st;
4b11111a
MS		 1297 struct sparablePartitionMap *spm =
1298 (struct sparablePartitionMap *)gpm;
28de7948 1299
6c79e987 1300 map->s_partition_type = UDF_SPARABLE_MAP15;
4b11111a
MS		 1301 map->s_type_specific.s_sparing.s_packet_len =
1302 le16_to_cpu(spm->packetLength);
cb00ea35 1303 for (j = 0; j < spm->numSparingTables; j++) {
4b11111a
MS		 1304 struct buffer_head *bh2;
1305
1306 loc = le32_to_cpu(
1307 spm->locSparingTable[j]);
1308 bh2 = udf_read_tagged(sb, loc, loc,
1309 &ident);
1310 map->s_type_specific.s_sparing.
1311 s_spar_map[j] = bh2;
1312
165923fa
MS		 1313 if (bh2 == NULL)
1314 continue;
1315
1316 st = (struct sparingTable *)bh2->b_data;
1317 if (ident != 0 || strncmp(
1318 st->sparingIdent.ident,
1319 UDF_ID_SPARING,
1320 strlen(UDF_ID_SPARING))) {
1321 brelse(bh2);
1322 map->s_type_specific.s_sparing.
1323 s_spar_map[j] = NULL;
1da177e4
LT		 1324 }
1325 }
6c79e987 1326 map->s_partition_func = udf_get_pblock_spar15;
bfb257a5
JK		 1327 } else if (!strncmp(upm2->partIdent.ident,
1328 UDF_ID_METADATA,
1329 strlen(UDF_ID_METADATA))) {
1330 struct udf_meta_data *mdata =
1331 &map->s_type_specific.s_metadata;
1332 struct metadataPartitionMap *mdm =
1333 (struct metadataPartitionMap *)
1334 &(lvd->partitionMaps[offset]);
1335 udf_debug("Parsing Logical vol part %d "
1336 "type %d id=%s\n", i, type,
1337 UDF_ID_METADATA);
1338
1339 map->s_partition_type = UDF_METADATA_MAP25;
1340 map->s_partition_func = udf_get_pblock_meta25;
1341
1342 mdata->s_meta_file_loc =
1343 le32_to_cpu(mdm->metadataFileLoc);
1344 mdata->s_mirror_file_loc =
1345 le32_to_cpu(mdm->metadataMirrorFileLoc);
1346 mdata->s_bitmap_file_loc =
1347 le32_to_cpu(mdm->metadataBitmapFileLoc);
1348 mdata->s_alloc_unit_size =
1349 le32_to_cpu(mdm->allocUnitSize);
1350 mdata->s_align_unit_size =
1351 le16_to_cpu(mdm->alignUnitSize);
1352 mdata->s_dup_md_flag =
1353 mdm->flags & 0x01;
1354
1355 udf_debug("Metadata Ident suffix=0x%x\n",
1356 (le16_to_cpu(
1357 ((__le16 *)
1358 mdm->partIdent.identSuffix)[0])));
1359 udf_debug("Metadata part num=%d\n",
1360 le16_to_cpu(mdm->partitionNum));
1361 udf_debug("Metadata part alloc unit size=%d\n",
1362 le32_to_cpu(mdm->allocUnitSize));
1363 udf_debug("Metadata file loc=%d\n",
1364 le32_to_cpu(mdm->metadataFileLoc));
1365 udf_debug("Mirror file loc=%d\n",
1366 le32_to_cpu(mdm->metadataMirrorFileLoc));
1367 udf_debug("Bitmap file loc=%d\n",
1368 le32_to_cpu(mdm->metadataBitmapFileLoc));
1369 udf_debug("Duplicate Flag: %d %d\n",
1370 mdata->s_dup_md_flag, mdm->flags);
cb00ea35 1371 } else {
3a71fc5d
MS		 1372 udf_debug("Unknown ident: %s\n",
1373 upm2->partIdent.ident);
1da177e4
LT		 1374 continue;
1375 }
6c79e987
MS		 1376 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1377 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1da177e4
LT		 1378 }
1379 udf_debug("Partition (%d:%d) type %d on volume %d\n",
6c79e987
MS		 1380 i, map->s_partition_num, type,
1381 map->s_volumeseqnum);
1da177e4
LT		 1382 }
1383
cb00ea35 1384 if (fileset) {
5ca4e4be 1385 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1da177e4
LT		 1386
1387 *fileset = lelb_to_cpu(la->extLocation);
3a71fc5d
MS		 1388 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1389 "partition=%d\n", fileset->logicalBlockNum,
28de7948 1390 fileset->partitionReferenceNum);
1da177e4
LT		 1391 }
1392 if (lvd->integritySeqExt.extLength)
1393 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
28de7948 1394
c0eb31ed
JK		 1395out_bh:
1396 brelse(bh);
1397 return ret;
1da177e4
LT		 1398}
1399
1400/*
1401 * udf_load_logicalvolint
1402 *
1403 */
5ca4e4be 1404static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1da177e4
LT		 1405{
1406 struct buffer_head *bh = NULL;
1407 uint16_t ident;
6c79e987
MS		 1408 struct udf_sb_info *sbi = UDF_SB(sb);
1409 struct logicalVolIntegrityDesc *lvid;
1da177e4
LT		 1410
1411 while (loc.extLength > 0 &&
cb00ea35
CG		 1412 (bh = udf_read_tagged(sb, loc.extLocation,
1413 loc.extLocation, &ident)) &&
1414 ident == TAG_IDENT_LVID) {
6c79e987
MS		 1415 sbi->s_lvid_bh = bh;
1416 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
cb00ea35 1417
6c79e987 1418 if (lvid->nextIntegrityExt.extLength)
3a71fc5d 1419 udf_load_logicalvolint(sb,
6c79e987 1420 leea_to_cpu(lvid->nextIntegrityExt));
cb00ea35 1421
6c79e987 1422 if (sbi->s_lvid_bh != bh)
3bf25cb4 1423 brelse(bh);
1da177e4 1424 loc.extLength -= sb->s_blocksize;
cb00ea35 1425 loc.extLocation++;
1da177e4 1426 }
6c79e987 1427 if (sbi->s_lvid_bh != bh)
3bf25cb4 1428 brelse(bh);
1da177e4
LT		 1429}
1430
1431/*
1432 * udf_process_sequence
1433 *
1434 * PURPOSE
1435 * Process a main/reserve volume descriptor sequence.
1436 *
1437 * PRE-CONDITIONS
1438 * sb Pointer to _locked_ superblock.
1439 * block First block of first extent of the sequence.
1440 * lastblock Lastblock of first extent of the sequence.
1441 *
1442 * HISTORY
1443 * July 1, 1997 - Andrew E. Mileski
1444 * Written, tested, and released.
1445 */
200a3592 1446static noinline int udf_process_sequence(struct super_block *sb, long block,
5ca4e4be 1447 long lastblock, struct kernel_lb_addr *fileset)
1da177e4
LT		 1448{
1449 struct buffer_head *bh = NULL;
1450 struct udf_vds_record vds[VDS_POS_LENGTH];
4b11111a 1451 struct udf_vds_record *curr;
1da177e4
LT		 1452 struct generic_desc *gd;
1453 struct volDescPtr *vdp;
cb00ea35 1454 int done = 0;
1da177e4
LT		 1455 uint32_t vdsn;
1456 uint16_t ident;
1457 long next_s = 0, next_e = 0;
1458
1459 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1460
c0eb31ed
JK		 1461 /*
1462 * Read the main descriptor sequence and find which descriptors
1463 * are in it.
1464 */
cb00ea35 1465 for (; (!done && block <= lastblock); block++) {
1da177e4
LT		 1466
1467 bh = udf_read_tagged(sb, block, block, &ident);
c0eb31ed
JK		 1468 if (!bh) {
1469 printk(KERN_ERR "udf: Block %Lu of volume descriptor "
1470 "sequence is corrupted or we could not read "
1471 "it.\n", (unsigned long long)block);
1472 return 1;
1473 }
1da177e4
LT		 1474
1475 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1476 gd = (struct generic_desc *)bh->b_data;
1477 vdsn = le32_to_cpu(gd->volDescSeqNum);
cb00ea35 1478 switch (ident) {
28de7948 1479 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
4b11111a
MS		 1480 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1481 if (vdsn >= curr->volDescSeqNum) {
1482 curr->volDescSeqNum = vdsn;
1483 curr->block = block;
cb00ea35
CG		 1484 }
1485 break;
28de7948 1486 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
4b11111a
MS		 1487 curr = &vds[VDS_POS_VOL_DESC_PTR];
1488 if (vdsn >= curr->volDescSeqNum) {
1489 curr->volDescSeqNum = vdsn;
1490 curr->block = block;
cb00ea35
CG		 1491
1492 vdp = (struct volDescPtr *)bh->b_data;
4b11111a
MS		 1493 next_s = le32_to_cpu(
1494 vdp->nextVolDescSeqExt.extLocation);
1495 next_e = le32_to_cpu(
1496 vdp->nextVolDescSeqExt.extLength);
cb00ea35
CG		 1497 next_e = next_e >> sb->s_blocksize_bits;
1498 next_e += next_s;
1499 }
1500 break;
28de7948 1501 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
4b11111a
MS		 1502 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1503 if (vdsn >= curr->volDescSeqNum) {
1504 curr->volDescSeqNum = vdsn;
1505 curr->block = block;
cb00ea35
CG		 1506 }
1507 break;
28de7948 1508 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
4b11111a
MS		 1509 curr = &vds[VDS_POS_PARTITION_DESC];
1510 if (!curr->block)
1511 curr->block = block;
cb00ea35 1512 break;
28de7948 1513 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
4b11111a
MS		 1514 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1515 if (vdsn >= curr->volDescSeqNum) {
1516 curr->volDescSeqNum = vdsn;
1517 curr->block = block;
cb00ea35
CG		 1518 }
1519 break;
28de7948 1520 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
4b11111a
MS		 1521 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1522 if (vdsn >= curr->volDescSeqNum) {
1523 curr->volDescSeqNum = vdsn;
1524 curr->block = block;
cb00ea35
CG		 1525 }
1526 break;
28de7948 1527 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
cb00ea35
CG		 1528 vds[VDS_POS_TERMINATING_DESC].block = block;
1529 if (next_e) {
1530 block = next_s;
1531 lastblock = next_e;
1532 next_s = next_e = 0;
4b11111a 1533 } else
cb00ea35
CG		 1534 done = 1;
1535 break;
1da177e4 1536 }
3bf25cb4 1537 brelse(bh);
1da177e4 1538 }
c0eb31ed
JK		 1539 /*
1540 * Now read interesting descriptors again and process them
1541 * in a suitable order
1542 */
1543 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1544 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n");
1545 return 1;
1546 }
1547 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1548 return 1;
165923fa 1549
c0eb31ed
JK		 1550 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1551 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1552 return 1;
165923fa 1553
c0eb31ed
JK		 1554 if (vds[VDS_POS_PARTITION_DESC].block) {
1555 /*
1556 * We rescan the whole descriptor sequence to find
1557 * partition descriptor blocks and process them.
1558 */
1559 for (block = vds[VDS_POS_PARTITION_DESC].block;
1560 block < vds[VDS_POS_TERMINATING_DESC].block;
1561 block++)
1562 if (udf_load_partdesc(sb, block))
165923fa 1563 return 1;
1da177e4
LT		 1564 }
1565
1566 return 0;
1567}
1568
40346005
JK		 1569static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1570 struct kernel_lb_addr *fileset)
1da177e4 1571{
40346005
JK		 1572 struct anchorVolDescPtr *anchor;
1573 long main_s, main_e, reserve_s, reserve_e;
1da177e4 1574
40346005
JK		 1575 anchor = (struct anchorVolDescPtr *)bh->b_data;
1576
1577 /* Locate the main sequence */
1578 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1579 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1580 main_e = main_e >> sb->s_blocksize_bits;
1581 main_e += main_s;
1582
1583 /* Locate the reserve sequence */
1584 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1585 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1586 reserve_e = reserve_e >> sb->s_blocksize_bits;
1587 reserve_e += reserve_s;
1588
1589 /* Process the main & reserve sequences */
1590 /* responsible for finding the PartitionDesc(s) */
1591 if (!udf_process_sequence(sb, main_s, main_e, fileset))
1592 return 1;
1593 return !udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1da177e4
LT		 1594}
1595
40346005
JK		 1596/*
1597 * Check whether there is an anchor block in the given block and
1598 * load Volume Descriptor Sequence if so.
1599 */
1600static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1601 struct kernel_lb_addr *fileset)
1197e4df 1602{
40346005
JK		 1603 struct buffer_head *bh;
1604 uint16_t ident;
1605 int ret;
1197e4df 1606
40346005
JK		 1607 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1608 udf_fixed_to_variable(block) >=
1609 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1197e4df 1610 return 0;
40346005
JK		 1611
1612 bh = udf_read_tagged(sb, block, block, &ident);
1613 if (!bh)
1197e4df 1614 return 0;
40346005
JK		 1615 if (ident != TAG_IDENT_AVDP) {
1616 brelse(bh);
1197e4df
CL		 1617 return 0;
1618 }
40346005
JK		 1619 ret = udf_load_sequence(sb, bh, fileset);
1620 brelse(bh);
1621 return ret;
1197e4df
CL		 1622}
1623
40346005
JK		 1624/* Search for an anchor volume descriptor pointer */
1625static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
1626 struct kernel_lb_addr *fileset)
1da177e4 1627{
40346005 1628 sector_t last[6];
38b74a53 1629 int i;
40346005
JK		 1630 struct udf_sb_info *sbi = UDF_SB(sb);
1631 int last_count = 0;
1da177e4 1632
40346005
JK		 1633 /* First try user provided anchor */
1634 if (sbi->s_anchor) {
1635 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
1636 return lastblock;
1637 }
1638 /*
1639 * according to spec, anchor is in either:
1640 * block 256
1641 * lastblock-256
1642 * lastblock
1643 * however, if the disc isn't closed, it could be 512.
1644 */
1645 if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
1646 return lastblock;
1647 /*
1648 * The trouble is which block is the last one. Drives often misreport
1649 * this so we try various possibilities.
1650 */
1651 last[last_count++] = lastblock;
1652 if (lastblock >= 1)
1653 last[last_count++] = lastblock - 1;
1654 last[last_count++] = lastblock + 1;
1655 if (lastblock >= 2)
1656 last[last_count++] = lastblock - 2;
1657 if (lastblock >= 150)
1658 last[last_count++] = lastblock - 150;
1659 if (lastblock >= 152)
1660 last[last_count++] = lastblock - 152;
1da177e4 1661
40346005
JK		 1662 for (i = 0; i < last_count; i++) {
1663 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1664 sb->s_blocksize_bits)
28f7c4d4 1665 continue;
40346005
JK		 1666 if (udf_check_anchor_block(sb, last[i], fileset))
1667 return last[i];
1668 if (last[i] < 256)
28f7c4d4 1669 continue;
40346005
JK		 1670 if (udf_check_anchor_block(sb, last[i] - 256, fileset))
1671 return last[i];
1672 }
28f7c4d4 1673
40346005
JK		 1674 /* Finally try block 512 in case media is open */
1675 if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
1676 return last[0];
1677 return 0;
1678}
28f7c4d4 1679
40346005
JK		 1680/*
1681 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1682 * area specified by it. The function expects sbi->s_lastblock to be the last
1683 * block on the media.
1684 *
1685 * Return 1 if ok, 0 if not found.
1686 *
1687 */
1688static int udf_find_anchor(struct super_block *sb,
1689 struct kernel_lb_addr *fileset)
1690{
1691 sector_t lastblock;
1692 struct udf_sb_info *sbi = UDF_SB(sb);
28f7c4d4 1693
40346005
JK		 1694 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1695 if (lastblock)
1696 goto out;
1da177e4 1697
40346005
JK		 1698 /* No anchor found? Try VARCONV conversion of block numbers */
1699 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1700 /* Firstly, we try to not convert number of the last block */
1701 lastblock = udf_scan_anchors(sb,
1702 udf_variable_to_fixed(sbi->s_last_block),
1703 fileset);
1704 if (lastblock)
1705 goto out;
1da177e4 1706
40346005
JK		 1707 /* Secondly, we try with converted number of the last block */
1708 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1709 if (!lastblock) {
1710 /* VARCONV didn't help. Clear it. */
1711 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1712 return 0;
1da177e4 1713 }
40346005
JK		 1714out:
1715 sbi->s_last_block = lastblock;
1716 return 1;
1717}
1da177e4 1718
40346005
JK		 1719/*
1720 * Check Volume Structure Descriptor, find Anchor block and load Volume
1721 * Descriptor Sequence
1722 */
1723static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1724 int silent, struct kernel_lb_addr *fileset)
1725{
1726 struct udf_sb_info *sbi = UDF_SB(sb);
1727 loff_t nsr_off;
1728
1729 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1730 if (!silent)
1731 printk(KERN_WARNING "UDF-fs: Bad block size\n");
1732 return 0;
1733 }
1734 sbi->s_last_block = uopt->lastblock;
1735 if (!uopt->novrs) {
1736 /* Check that it is NSR02 compliant */
1737 nsr_off = udf_check_vsd(sb);
1738 if (!nsr_off) {
1739 if (!silent)
1740 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1741 return 0;
1742 }
1743 if (nsr_off == -1)
1744 udf_debug("Failed to read byte 32768. Assuming open "
1745 "disc. Skipping validity check\n");
1746 if (!sbi->s_last_block)
1747 sbi->s_last_block = udf_get_last_block(sb);
1748 } else {
1749 udf_debug("Validity check skipped because of novrs option\n");
28f7c4d4 1750 }
1da177e4 1751
40346005
JK		 1752 /* Look for anchor block and load Volume Descriptor Sequence */
1753 sbi->s_anchor = uopt->anchor;
1754 if (!udf_find_anchor(sb, fileset)) {
1755 if (!silent)
1756 printk(KERN_WARNING "UDF-fs: No anchor found\n");
1757 return 0;
1758 }
1759 return 1;
1da177e4
LT		 1760}
1761
1762static void udf_open_lvid(struct super_block *sb)
1763{
6c79e987
MS		 1764 struct udf_sb_info *sbi = UDF_SB(sb);
1765 struct buffer_head *bh = sbi->s_lvid_bh;
165923fa
MS		 1766 struct logicalVolIntegrityDesc *lvid;
1767 struct logicalVolIntegrityDescImpUse *lvidiu;
146bca72 1768
165923fa
MS		 1769 if (!bh)
1770 return;
949f4a7c
JK		 1771
1772 mutex_lock(&sbi->s_alloc_mutex);
165923fa
MS		 1773 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1774 lvidiu = udf_sb_lvidiu(sbi);
1775
1776 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1777 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1778 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1779 CURRENT_TIME);
146bca72 1780 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
165923fa
MS		 1781
1782 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1783 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1784 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1785
1786 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1787 mark_buffer_dirty(bh);
146bca72 1788 sbi->s_lvid_dirty = 0;
949f4a7c 1789 mutex_unlock(&sbi->s_alloc_mutex);
1da177e4
LT		 1790}
1791
1792static void udf_close_lvid(struct super_block *sb)
1793{
6c79e987
MS		 1794 struct udf_sb_info *sbi = UDF_SB(sb);
1795 struct buffer_head *bh = sbi->s_lvid_bh;
1796 struct logicalVolIntegrityDesc *lvid;
165923fa 1797 struct logicalVolIntegrityDescImpUse *lvidiu;
28de7948 1798
6c79e987
MS		 1799 if (!bh)
1800 return;
1801
949f4a7c 1802 mutex_lock(&sbi->s_alloc_mutex);
6c79e987 1803 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
165923fa
MS		 1804 lvidiu = udf_sb_lvidiu(sbi);
1805 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1806 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1807 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1808 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1809 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1810 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1811 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1812 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1813 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1814 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1815
1816 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1817 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1818 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1819
1820 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1821 mark_buffer_dirty(bh);
146bca72 1822 sbi->s_lvid_dirty = 0;
949f4a7c 1823 mutex_unlock(&sbi->s_alloc_mutex);
1da177e4
LT		 1824}
1825
d664b6af
JK		 1826u64 lvid_get_unique_id(struct super_block *sb)
1827{
1828 struct buffer_head *bh;
1829 struct udf_sb_info *sbi = UDF_SB(sb);
1830 struct logicalVolIntegrityDesc *lvid;
1831 struct logicalVolHeaderDesc *lvhd;
1832 u64 uniqueID;
1833 u64 ret;
1834
1835 bh = sbi->s_lvid_bh;
1836 if (!bh)
1837 return 0;
1838
1839 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1840 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
1841
1842 mutex_lock(&sbi->s_alloc_mutex);
1843 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
1844 if (!(++uniqueID & 0xFFFFFFFF))
1845 uniqueID += 16;
1846 lvhd->uniqueID = cpu_to_le64(uniqueID);
1847 mutex_unlock(&sbi->s_alloc_mutex);
1848 mark_buffer_dirty(bh);
1849
1850 return ret;
1da177e4
LT		 1851}
1852
66e1da3f
MS		 1853static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1854{
1855 int i;
1856 int nr_groups = bitmap->s_nr_groups;
4b11111a
MS		 1857 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1858 nr_groups);
66e1da3f
MS		 1859
1860 for (i = 0; i < nr_groups; i++)
1861 if (bitmap->s_block_bitmap[i])
1862 brelse(bitmap->s_block_bitmap[i]);
1863
1864 if (size <= PAGE_SIZE)
1865 kfree(bitmap);
1866 else
1867 vfree(bitmap);
1868}
1869
2e0838fd
JK		 1870static void udf_free_partition(struct udf_part_map *map)
1871{
1872 int i;
bfb257a5 1873 struct udf_meta_data *mdata;
2e0838fd
JK		 1874
1875 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1876 iput(map->s_uspace.s_table);
1877 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1878 iput(map->s_fspace.s_table);
1879 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1880 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1881 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1882 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1883 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1884 for (i = 0; i < 4; i++)
1885 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
bfb257a5
JK		 1886 else if (map->s_partition_type == UDF_METADATA_MAP25) {
1887 mdata = &map->s_type_specific.s_metadata;
1888 iput(mdata->s_metadata_fe);
1889 mdata->s_metadata_fe = NULL;
1890
1891 iput(mdata->s_mirror_fe);
1892 mdata->s_mirror_fe = NULL;
1893
1894 iput(mdata->s_bitmap_fe);
1895 mdata->s_bitmap_fe = NULL;
1896 }
2e0838fd
JK		 1897}
1898
1da177e4
LT		 1899static int udf_fill_super(struct super_block *sb, void *options, int silent)
1900{
1901 int i;
40346005 1902 int ret;
cb00ea35 1903 struct inode *inode = NULL;
1da177e4 1904 struct udf_options uopt;
5ca4e4be 1905 struct kernel_lb_addr rootdir, fileset;
1da177e4
LT		 1906 struct udf_sb_info *sbi;
1907
1908 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1909 uopt.uid = -1;
1910 uopt.gid = -1;
1911 uopt.umask = 0;
87bc730c
MS		 1912 uopt.fmode = UDF_INVALID_MODE;
1913 uopt.dmode = UDF_INVALID_MODE;
1da177e4 1914
6c79e987 1915 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
9db9f9e3 1916 if (!sbi)
1da177e4 1917 return -ENOMEM;
28de7948 1918
1da177e4 1919 sb->s_fs_info = sbi;
1da177e4 1920
1e7933de 1921 mutex_init(&sbi->s_alloc_mutex);
1da177e4 1922
6da80894 1923 if (!udf_parse_options((char *)options, &uopt, false))
1da177e4
LT		 1924 goto error_out;
1925
1926 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
cb00ea35 1927 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
8076c363 1928 udf_err(sb, "utf8 cannot be combined with iocharset\n");
1da177e4
LT		 1929 goto error_out;
1930 }
1931#ifdef CONFIG_UDF_NLS
cb00ea35 1932 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1da177e4
LT		 1933 uopt.nls_map = load_nls_default();
1934 if (!uopt.nls_map)
1935 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1936 else
1937 udf_debug("Using default NLS map\n");
1938 }
1939#endif
1940 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1941 uopt.flags |= (1 << UDF_FLAG_UTF8);
1942
1943 fileset.logicalBlockNum = 0xFFFFFFFF;
1944 fileset.partitionReferenceNum = 0xFFFF;
1945
6c79e987
MS		 1946 sbi->s_flags = uopt.flags;
1947 sbi->s_uid = uopt.uid;
1948 sbi->s_gid = uopt.gid;
1949 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 1950 sbi->s_fmode = uopt.fmode;
1951 sbi->s_dmode = uopt.dmode;
6c79e987 1952 sbi->s_nls_map = uopt.nls_map;
c03cad24 1953 rwlock_init(&sbi->s_cred_lock);
1da177e4 1954
cb00ea35 1955 if (uopt.session == 0xFFFFFFFF)
6c79e987 1956 sbi->s_session = udf_get_last_session(sb);
1da177e4 1957 else
6c79e987 1958 sbi->s_session = uopt.session;
1da177e4 1959
6c79e987 1960 udf_debug("Multi-session=%d\n", sbi->s_session);
1da177e4 1961
40346005
JK		 1962 /* Fill in the rest of the superblock */
1963 sb->s_op = &udf_sb_ops;
1964 sb->s_export_op = &udf_export_ops;
123e9caf 1965
40346005
JK		 1966 sb->s_dirt = 0;
1967 sb->s_magic = UDF_SUPER_MAGIC;
1968 sb->s_time_gran = 1000;
1969
1197e4df 1970 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
40346005 1971 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 1972 } else {
e1defc4f 1973 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
40346005
JK		 1974 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1975 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1197e4df
CL		 1976 if (!silent)
1977 printk(KERN_NOTICE
1978 "UDF-fs: Rescanning with blocksize "
1979 "%d\n", UDF_DEFAULT_BLOCKSIZE);
1980 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
40346005 1981 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 1982 }
1da177e4 1983 }
40346005 1984 if (!ret) {
3a71fc5d 1985 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
1da177e4
LT		 1986 goto error_out;
1987 }
1988
6c79e987 1989 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1da177e4 1990
6c79e987 1991 if (sbi->s_lvid_bh) {
4b11111a
MS		 1992 struct logicalVolIntegrityDescImpUse *lvidiu =
1993 udf_sb_lvidiu(sbi);
6c79e987
MS		 1994 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1995 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
4b11111a
MS		 1996 /* uint16_t maxUDFWriteRev =
1997 le16_to_cpu(lvidiu->maxUDFWriteRev); */
1da177e4 1998
cb00ea35 1999 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
4b11111a
MS		 2000 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
2001 "(max is %x)\n",
6c79e987 2002 le16_to_cpu(lvidiu->minUDFReadRev),
cb00ea35 2003 UDF_MAX_READ_VERSION);
1da177e4 2004 goto error_out;
4b11111a 2005 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
1da177e4 2006 sb->s_flags |= MS_RDONLY;
1da177e4 2007
6c79e987 2008 sbi->s_udfrev = minUDFWriteRev;
1da177e4
LT		 2009
2010 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2011 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2012 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2013 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2014 }
2015
6c79e987 2016 if (!sbi->s_partitions) {
3a71fc5d 2017 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
1da177e4
LT		 2018 goto error_out;
2019 }
2020
4b11111a
MS		 2021 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2022 UDF_PART_FLAG_READ_ONLY) {
2023 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
2024 "forcing readonly mount\n");
39b3f6d6 2025 sb->s_flags |= MS_RDONLY;
c1a26e7d 2026 }
39b3f6d6 2027
cb00ea35 2028 if (udf_find_fileset(sb, &fileset, &rootdir)) {
3a71fc5d 2029 printk(KERN_WARNING "UDF-fs: No fileset found\n");
1da177e4
LT		 2030 goto error_out;
2031 }
2032
cb00ea35 2033 if (!silent) {
5ca4e4be 2034 struct timestamp ts;
56774805 2035 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
a9ca6635 2036 udf_info("UDF: Mounting volume '%s', "
28de7948 2037 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
56774805
MS		 2038 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
2039 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1da177e4
LT		 2040 }
2041 if (!(sb->s_flags & MS_RDONLY))
2042 udf_open_lvid(sb);
2043
2044 /* Assign the root inode */
2045 /* assign inodes by physical block number */
2046 /* perhaps it's not extensible enough, but for now ... */
97e961fd 2047 inode = udf_iget(sb, &rootdir);
cb00ea35 2048 if (!inode) {
4b11111a
MS		 2049 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
2050 "partition=%d\n",
cb00ea35 2051 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
1da177e4
LT		 2052 goto error_out;
2053 }
2054
2055 /* Allocate a dentry for the root inode */
2056 sb->s_root = d_alloc_root(inode);
cb00ea35 2057 if (!sb->s_root) {
3a71fc5d 2058 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
1da177e4
LT		 2059 iput(inode);
2060 goto error_out;
2061 }
31170b6a 2062 sb->s_maxbytes = MAX_LFS_FILESIZE;
1da177e4
LT		 2063 return 0;
2064
28de7948 2065error_out:
6c79e987
MS		 2066 if (sbi->s_vat_inode)
2067 iput(sbi->s_vat_inode);
2e0838fd
JK		 2068 if (sbi->s_partitions)
2069 for (i = 0; i < sbi->s_partitions; i++)
2070 udf_free_partition(&sbi->s_partmaps[i]);
1da177e4
LT		 2071#ifdef CONFIG_UDF_NLS
2072 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2073 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2074#endif
2075 if (!(sb->s_flags & MS_RDONLY))
2076 udf_close_lvid(sb);
6c79e987
MS		 2077 brelse(sbi->s_lvid_bh);
2078
2079 kfree(sbi->s_partmaps);
1da177e4
LT		 2080 kfree(sbi);
2081 sb->s_fs_info = NULL;
28de7948 2082
1da177e4
LT		 2083 return -EINVAL;
2084}
2085
8076c363
JP		 2086void _udf_err(struct super_block *sb, const char *function,
2087 const char *fmt, ...)
1da177e4
LT		 2088{
2089 va_list args;
2090
cb00ea35 2091 if (!(sb->s_flags & MS_RDONLY)) {
1da177e4
LT		 2092 /* mark sb error */
2093 sb->s_dirt = 1;
2094 }
2095 va_start(args, fmt);
4a6e617a 2096 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1da177e4 2097 va_end(args);
8076c363
JP		 2098 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s",
2099 sb->s_id, function, error_buf);
1da177e4
LT		 2100}
2101
a40ecd7b
JP		 2102void _udf_warn(struct super_block *sb, const char *function,
2103 const char *fmt, ...)
1da177e4
LT		 2104{
2105 va_list args;
2106
cb00ea35 2107 va_start(args, fmt);
4a6e617a 2108 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1da177e4 2109 va_end(args);
a40ecd7b 2110 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s",
cb00ea35 2111 sb->s_id, function, error_buf);
1da177e4
LT		 2112}
2113
cb00ea35 2114static void udf_put_super(struct super_block *sb)
1da177e4
LT		 2115{
2116 int i;
6c79e987 2117 struct udf_sb_info *sbi;
1da177e4 2118
6c79e987 2119 sbi = UDF_SB(sb);
6cfd0148 2120
6c79e987
MS		 2121 if (sbi->s_vat_inode)
2122 iput(sbi->s_vat_inode);
2e0838fd
JK		 2123 if (sbi->s_partitions)
2124 for (i = 0; i < sbi->s_partitions; i++)
2125 udf_free_partition(&sbi->s_partmaps[i]);
1da177e4
LT		 2126#ifdef CONFIG_UDF_NLS
2127 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2128 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2129#endif
2130 if (!(sb->s_flags & MS_RDONLY))
2131 udf_close_lvid(sb);
6c79e987
MS		 2132 brelse(sbi->s_lvid_bh);
2133 kfree(sbi->s_partmaps);
1da177e4
LT		 2134 kfree(sb->s_fs_info);
2135 sb->s_fs_info = NULL;
2136}
2137
146bca72
JK		 2138static int udf_sync_fs(struct super_block *sb, int wait)
2139{
2140 struct udf_sb_info *sbi = UDF_SB(sb);
2141
2142 mutex_lock(&sbi->s_alloc_mutex);
2143 if (sbi->s_lvid_dirty) {
2144 /*
2145 * Blockdevice will be synced later so we don't have to submit
2146 * the buffer for IO
2147 */
2148 mark_buffer_dirty(sbi->s_lvid_bh);
2149 sb->s_dirt = 0;
2150 sbi->s_lvid_dirty = 0;
2151 }
2152 mutex_unlock(&sbi->s_alloc_mutex);
2153
2154 return 0;
2155}
2156
cb00ea35 2157static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 2158{
726c3342 2159 struct super_block *sb = dentry->d_sb;
6c79e987
MS		 2160 struct udf_sb_info *sbi = UDF_SB(sb);
2161 struct logicalVolIntegrityDescImpUse *lvidiu;
557f5a14 2162 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
6c79e987
MS		 2163
2164 if (sbi->s_lvid_bh != NULL)
2165 lvidiu = udf_sb_lvidiu(sbi);
2166 else
2167 lvidiu = NULL;
726c3342 2168
1da177e4
LT		 2169 buf->f_type = UDF_SUPER_MAGIC;
2170 buf->f_bsize = sb->s_blocksize;
6c79e987 2171 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1da177e4
LT		 2172 buf->f_bfree = udf_count_free(sb);
2173 buf->f_bavail = buf->f_bfree;
6c79e987
MS		 2174 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2175 le32_to_cpu(lvidiu->numDirs)) : 0)
2176 + buf->f_bfree;
1da177e4 2177 buf->f_ffree = buf->f_bfree;
cb00ea35 2178 buf->f_namelen = UDF_NAME_LEN - 2;
557f5a14
CL		 2179 buf->f_fsid.val[0] = (u32)id;
2180 buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4
LT		 2181
2182 return 0;
2183}
2184
4b11111a
MS		 2185static unsigned int udf_count_free_bitmap(struct super_block *sb,
2186 struct udf_bitmap *bitmap)
1da177e4
LT		 2187{
2188 struct buffer_head *bh = NULL;
2189 unsigned int accum = 0;
2190 int index;
2191 int block = 0, newblock;
5ca4e4be 2192 struct kernel_lb_addr loc;
1da177e4 2193 uint32_t bytes;
1da177e4
LT		 2194 uint8_t *ptr;
2195 uint16_t ident;
2196 struct spaceBitmapDesc *bm;
2197
1da177e4 2198 loc.logicalBlockNum = bitmap->s_extPosition;
6c79e987 2199 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
97e961fd 2200 bh = udf_read_ptagged(sb, &loc, 0, &ident);
1da177e4 2201
cb00ea35 2202 if (!bh) {
1da177e4
LT		 2203 printk(KERN_ERR "udf: udf_count_free failed\n");
2204 goto out;
cb00ea35 2205 } else if (ident != TAG_IDENT_SBD) {
3bf25cb4 2206 brelse(bh);
1da177e4
LT		 2207 printk(KERN_ERR "udf: udf_count_free failed\n");
2208 goto out;
2209 }
2210
2211 bm = (struct spaceBitmapDesc *)bh->b_data;
2212 bytes = le32_to_cpu(bm->numOfBytes);
28de7948
CG		 2213 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2214 ptr = (uint8_t *)bh->b_data;
1da177e4 2215
cb00ea35 2216 while (bytes > 0) {
01b954a3
MS		 2217 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2218 accum += bitmap_weight((const unsigned long *)(ptr + index),
2219 cur_bytes * 8);
2220 bytes -= cur_bytes;
cb00ea35 2221 if (bytes) {
3bf25cb4 2222 brelse(bh);
97e961fd 2223 newblock = udf_get_lb_pblock(sb, &loc, ++block);
1da177e4 2224 bh = udf_tread(sb, newblock);
cb00ea35 2225 if (!bh) {
1da177e4
LT		 2226 udf_debug("read failed\n");
2227 goto out;
2228 }
2229 index = 0;
28de7948 2230 ptr = (uint8_t *)bh->b_data;
1da177e4
LT		 2231 }
2232 }
3bf25cb4 2233 brelse(bh);
28de7948 2234out:
1da177e4
LT		 2235 return accum;
2236}
2237
4b11111a
MS		 2238static unsigned int udf_count_free_table(struct super_block *sb,
2239 struct inode *table)
1da177e4
LT		 2240{
2241 unsigned int accum = 0;
ff116fc8 2242 uint32_t elen;
5ca4e4be 2243 struct kernel_lb_addr eloc;
1da177e4 2244 int8_t etype;
ff116fc8 2245 struct extent_position epos;
1da177e4 2246
d1668fe3 2247 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
c0b34438 2248 epos.block = UDF_I(table)->i_location;
ff116fc8
JK		 2249 epos.offset = sizeof(struct unallocSpaceEntry);
2250 epos.bh = NULL;
1da177e4 2251
3a71fc5d 2252 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
1da177e4 2253 accum += (elen >> table->i_sb->s_blocksize_bits);
3a71fc5d 2254
3bf25cb4 2255 brelse(epos.bh);
d1668fe3 2256 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
1da177e4
LT		 2257
2258 return accum;
2259}
cb00ea35
CG		 2260
2261static unsigned int udf_count_free(struct super_block *sb)
1da177e4
LT		 2262{
2263 unsigned int accum = 0;
6c79e987
MS		 2264 struct udf_sb_info *sbi;
2265 struct udf_part_map *map;
1da177e4 2266
6c79e987
MS		 2267 sbi = UDF_SB(sb);
2268 if (sbi->s_lvid_bh) {
4b11111a
MS		 2269 struct logicalVolIntegrityDesc *lvid =
2270 (struct logicalVolIntegrityDesc *)
2271 sbi->s_lvid_bh->b_data;
6c79e987 2272 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
4b11111a
MS		 2273 accum = le32_to_cpu(
2274 lvid->freeSpaceTable[sbi->s_partition]);
1da177e4
LT		 2275 if (accum == 0xFFFFFFFF)
2276 accum = 0;
2277 }
2278 }
2279
2280 if (accum)
2281 return accum;
2282
6c79e987
MS		 2283 map = &sbi->s_partmaps[sbi->s_partition];
2284 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
28de7948 2285 accum += udf_count_free_bitmap(sb,
6c79e987 2286 map->s_uspace.s_bitmap);
1da177e4 2287 }
6c79e987 2288 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
28de7948 2289 accum += udf_count_free_bitmap(sb,
6c79e987 2290 map->s_fspace.s_bitmap);
1da177e4
LT		 2291 }
2292 if (accum)
2293 return accum;
2294
6c79e987 2295 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
28de7948 2296 accum += udf_count_free_table(sb,
6c79e987 2297 map->s_uspace.s_table);
1da177e4 2298 }
6c79e987 2299 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
28de7948 2300 accum += udf_count_free_table(sb,
6c79e987 2301 map->s_fspace.s_table);
1da177e4
LT		 2302 }
2303
2304 return accum;
2305}
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