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udf: Remove dead quota code
[net-next-2.6.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>
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>
f845fced 59#include <linux/crc-itu-t.h>
1da177e4
LT		 60#include <asm/byteorder.h>
61
1da177e4
LT		 62#include "udf_sb.h"
63#include "udf_i.h"
64
65#include <linux/init.h>
66#include <asm/uaccess.h>
67
68#define VDS_POS_PRIMARY_VOL_DESC 0
69#define VDS_POS_UNALLOC_SPACE_DESC 1
70#define VDS_POS_LOGICAL_VOL_DESC 2
71#define VDS_POS_PARTITION_DESC 3
72#define VDS_POS_IMP_USE_VOL_DESC 4
73#define VDS_POS_VOL_DESC_PTR 5
74#define VDS_POS_TERMINATING_DESC 6
75#define VDS_POS_LENGTH 7
76
6da80894
MS		 77#define UDF_DEFAULT_BLOCKSIZE 2048
78
1da177e4
LT		 79static char error_buf[1024];
80
81/* These are the "meat" - everything else is stuffing */
82static int udf_fill_super(struct super_block *, void *, int);
83static void udf_put_super(struct super_block *);
146bca72 84static int udf_sync_fs(struct super_block *, int);
1da177e4 85static int udf_remount_fs(struct super_block *, int *, char *);
5ca4e4be 86static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
5ca4e4be
PE		 87static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
88 struct kernel_lb_addr *);
cb00ea35 89static void udf_load_fileset(struct super_block *, struct buffer_head *,
5ca4e4be 90 struct kernel_lb_addr *);
1da177e4
LT		 91static void udf_open_lvid(struct super_block *);
92static void udf_close_lvid(struct super_block *);
93static unsigned int udf_count_free(struct super_block *);
726c3342 94static int udf_statfs(struct dentry *, struct kstatfs *);
6da80894 95static int udf_show_options(struct seq_file *, struct vfsmount *);
b8145a76
AB		 96static void udf_error(struct super_block *sb, const char *function,
97 const char *fmt, ...);
1da177e4 98
6c79e987
MS		 99struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
100{
4b11111a
MS		 101 struct logicalVolIntegrityDesc *lvid =
102 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
6c79e987 103 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
4b11111a
MS		 104 __u32 offset = number_of_partitions * 2 *
105 sizeof(uint32_t)/sizeof(uint8_t);
6c79e987
MS		 106 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
107}
108
1da177e4 109/* UDF filesystem type */
454e2398 110static int udf_get_sb(struct file_system_type *fs_type,
cb00ea35
CG		 111 int flags, const char *dev_name, void *data,
112 struct vfsmount *mnt)
1da177e4 113{
454e2398 114 return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt);
1da177e4
LT		 115}
116
117static struct file_system_type udf_fstype = {
28de7948
CG		 118 .owner = THIS_MODULE,
119 .name = "udf",
120 .get_sb = udf_get_sb,
121 .kill_sb = kill_block_super,
122 .fs_flags = FS_REQUIRES_DEV,
1da177e4
LT		 123};
124
cb00ea35 125static struct kmem_cache *udf_inode_cachep;
1da177e4
LT		 126
127static struct inode *udf_alloc_inode(struct super_block *sb)
128{
129 struct udf_inode_info *ei;
3a71fc5d 130 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
1da177e4
LT		 131 if (!ei)
132 return NULL;
95f8797f
DB		 133
134 ei->i_unique = 0;
135 ei->i_lenExtents = 0;
136 ei->i_next_alloc_block = 0;
137 ei->i_next_alloc_goal = 0;
138 ei->i_strat4096 = 0;
139
1da177e4
LT		 140 return &ei->vfs_inode;
141}
142
143static void udf_destroy_inode(struct inode *inode)
144{
145 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
146}
147
51cc5068 148static void init_once(void *foo)
1da177e4 149{
cb00ea35 150 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
1da177e4 151
a35afb83
CL		 152 ei->i_ext.i_data = NULL;
153 inode_init_once(&ei->vfs_inode);
1da177e4
LT		 154}
155
156static int init_inodecache(void)
157{
158 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
159 sizeof(struct udf_inode_info),
cb00ea35
CG		 160 0, (SLAB_RECLAIM_ACCOUNT |
161 SLAB_MEM_SPREAD),
20c2df83 162 init_once);
28de7948 163 if (!udf_inode_cachep)
1da177e4
LT		 164 return -ENOMEM;
165 return 0;
166}
167
168static void destroy_inodecache(void)
169{
1a1d92c1 170 kmem_cache_destroy(udf_inode_cachep);
1da177e4
LT		 171}
172
173/* Superblock operations */
ee9b6d61 174static const struct super_operations udf_sb_ops = {
28de7948
CG		 175 .alloc_inode = udf_alloc_inode,
176 .destroy_inode = udf_destroy_inode,
177 .write_inode = udf_write_inode,
178 .delete_inode = udf_delete_inode,
179 .clear_inode = udf_clear_inode,
180 .put_super = udf_put_super,
146bca72 181 .sync_fs = udf_sync_fs,
28de7948
CG		 182 .statfs = udf_statfs,
183 .remount_fs = udf_remount_fs,
6da80894 184 .show_options = udf_show_options,
1da177e4
LT		 185};
186
cb00ea35 187struct udf_options {
1da177e4
LT		 188 unsigned char novrs;
189 unsigned int blocksize;
190 unsigned int session;
191 unsigned int lastblock;
192 unsigned int anchor;
193 unsigned int volume;
194 unsigned short partition;
195 unsigned int fileset;
196 unsigned int rootdir;
197 unsigned int flags;
198 mode_t umask;
199 gid_t gid;
200 uid_t uid;
7ac9bcd5
MS		 201 mode_t fmode;
202 mode_t dmode;
1da177e4
LT		 203 struct nls_table *nls_map;
204};
205
206static int __init init_udf_fs(void)
207{
208 int err;
28de7948 209
1da177e4
LT		 210 err = init_inodecache();
211 if (err)
212 goto out1;
213 err = register_filesystem(&udf_fstype);
214 if (err)
215 goto out;
28de7948 216
1da177e4 217 return 0;
28de7948
CG		 218
219out:
1da177e4 220 destroy_inodecache();
28de7948
CG		 221
222out1:
1da177e4
LT		 223 return err;
224}
225
226static void __exit exit_udf_fs(void)
227{
228 unregister_filesystem(&udf_fstype);
229 destroy_inodecache();
230}
231
232module_init(init_udf_fs)
28de7948 233module_exit(exit_udf_fs)
1da177e4 234
dc5d39be
MS		 235static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
236{
237 struct udf_sb_info *sbi = UDF_SB(sb);
238
239 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
240 GFP_KERNEL);
241 if (!sbi->s_partmaps) {
8e24eea7 242 udf_error(sb, __func__,
dc5d39be
MS		 243 "Unable to allocate space for %d partition maps",
244 count);
245 sbi->s_partitions = 0;
246 return -ENOMEM;
247 }
248
249 sbi->s_partitions = count;
250 return 0;
251}
252
6da80894
MS		 253static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
254{
255 struct super_block *sb = mnt->mnt_sb;
256 struct udf_sb_info *sbi = UDF_SB(sb);
257
258 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
259 seq_puts(seq, ",nostrict");
1197e4df 260 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
6da80894
MS		 261 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
262 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
263 seq_puts(seq, ",unhide");
264 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
265 seq_puts(seq, ",undelete");
266 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
267 seq_puts(seq, ",noadinicb");
268 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
269 seq_puts(seq, ",shortad");
270 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
271 seq_puts(seq, ",uid=forget");
272 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
273 seq_puts(seq, ",uid=ignore");
274 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
275 seq_puts(seq, ",gid=forget");
276 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
277 seq_puts(seq, ",gid=ignore");
278 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
279 seq_printf(seq, ",uid=%u", sbi->s_uid);
280 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
281 seq_printf(seq, ",gid=%u", sbi->s_gid);
282 if (sbi->s_umask != 0)
283 seq_printf(seq, ",umask=%o", sbi->s_umask);
87bc730c 284 if (sbi->s_fmode != UDF_INVALID_MODE)
7ac9bcd5 285 seq_printf(seq, ",mode=%o", sbi->s_fmode);
87bc730c 286 if (sbi->s_dmode != UDF_INVALID_MODE)
7ac9bcd5 287 seq_printf(seq, ",dmode=%o", sbi->s_dmode);
6da80894
MS		 288 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
289 seq_printf(seq, ",session=%u", sbi->s_session);
290 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
291 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
40346005
JK		 292 if (sbi->s_anchor != 0)
293 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
6da80894
MS		 294 /*
295 * volume, partition, fileset and rootdir seem to be ignored
296 * currently
297 */
298 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
299 seq_puts(seq, ",utf8");
300 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
301 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
302
303 return 0;
304}
305
1da177e4
LT		 306/*
307 * udf_parse_options
308 *
309 * PURPOSE
310 * Parse mount options.
311 *
312 * DESCRIPTION
313 * The following mount options are supported:
314 *
315 * gid= Set the default group.
316 * umask= Set the default umask.
7ac9bcd5
MS		 317 * mode= Set the default file permissions.
318 * dmode= Set the default directory permissions.
1da177e4
LT		 319 * uid= Set the default user.
320 * bs= Set the block size.
321 * unhide Show otherwise hidden files.
322 * undelete Show deleted files in lists.
323 * adinicb Embed data in the inode (default)
324 * noadinicb Don't embed data in the inode
325 * shortad Use short ad's
326 * longad Use long ad's (default)
327 * nostrict Unset strict conformance
328 * iocharset= Set the NLS character set
329 *
330 * The remaining are for debugging and disaster recovery:
331 *
28de7948 332 * novrs Skip volume sequence recognition
1da177e4
LT		 333 *
334 * The following expect a offset from 0.
335 *
336 * session= Set the CDROM session (default= last session)
337 * anchor= Override standard anchor location. (default= 256)
338 * volume= Override the VolumeDesc location. (unused)
339 * partition= Override the PartitionDesc location. (unused)
340 * lastblock= Set the last block of the filesystem/
341 *
342 * The following expect a offset from the partition root.
343 *
344 * fileset= Override the fileset block location. (unused)
345 * rootdir= Override the root directory location. (unused)
346 * WARNING: overriding the rootdir to a non-directory may
347 * yield highly unpredictable results.
348 *
349 * PRE-CONDITIONS
350 * options Pointer to mount options string.
351 * uopts Pointer to mount options variable.
352 *
353 * POST-CONDITIONS
354 * <return> 1 Mount options parsed okay.
355 * <return> 0 Error parsing mount options.
356 *
357 * HISTORY
358 * July 1, 1997 - Andrew E. Mileski
359 * Written, tested, and released.
360 */
28de7948 361
1da177e4
LT		 362enum {
363 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
364 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
365 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
366 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
367 Opt_rootdir, Opt_utf8, Opt_iocharset,
7ac9bcd5
MS		 368 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
369 Opt_fmode, Opt_dmode
1da177e4
LT		 370};
371
a447c093 372static const 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"},
7ac9bcd5
MS		 398 {Opt_fmode, "mode=%o"},
399 {Opt_dmode, "dmode=%o"},
28de7948 400 {Opt_err, NULL}
1da177e4
LT		 401};
402
6da80894
MS		 403static int udf_parse_options(char *options, struct udf_options *uopt,
404 bool remount)
1da177e4
LT		 405{
406 char *p;
407 int option;
408
409 uopt->novrs = 0;
1da177e4
LT		 410 uopt->partition = 0xFFFF;
411 uopt->session = 0xFFFFFFFF;
412 uopt->lastblock = 0;
413 uopt->anchor = 0;
414 uopt->volume = 0xFFFFFFFF;
415 uopt->rootdir = 0xFFFFFFFF;
416 uopt->fileset = 0xFFFFFFFF;
417 uopt->nls_map = NULL;
418
419 if (!options)
420 return 1;
421
cb00ea35 422 while ((p = strsep(&options, ",")) != NULL) {
1da177e4
LT		 423 substring_t args[MAX_OPT_ARGS];
424 int token;
425 if (!*p)
426 continue;
427
428 token = match_token(p, tokens, args);
cb00ea35
CG		 429 switch (token) {
430 case Opt_novrs:
431 uopt->novrs = 1;
4136801a 432 break;
cb00ea35
CG		 433 case Opt_bs:
434 if (match_int(&args[0], &option))
435 return 0;
436 uopt->blocksize = option;
1197e4df 437 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
cb00ea35
CG		 438 break;
439 case Opt_unhide:
440 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
441 break;
442 case Opt_undelete:
443 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
444 break;
445 case Opt_noadinicb:
446 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
447 break;
448 case Opt_adinicb:
449 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
450 break;
451 case Opt_shortad:
452 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
453 break;
454 case Opt_longad:
455 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
456 break;
457 case Opt_gid:
458 if (match_int(args, &option))
459 return 0;
460 uopt->gid = option;
ca76d2d8 461 uopt->flags |= (1 << UDF_FLAG_GID_SET);
cb00ea35
CG		 462 break;
463 case Opt_uid:
464 if (match_int(args, &option))
465 return 0;
466 uopt->uid = option;
ca76d2d8 467 uopt->flags |= (1 << UDF_FLAG_UID_SET);
cb00ea35
CG		 468 break;
469 case Opt_umask:
470 if (match_octal(args, &option))
471 return 0;
472 uopt->umask = option;
473 break;
474 case Opt_nostrict:
475 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
476 break;
477 case Opt_session:
478 if (match_int(args, &option))
479 return 0;
480 uopt->session = option;
6da80894
MS		 481 if (!remount)
482 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
cb00ea35
CG		 483 break;
484 case Opt_lastblock:
485 if (match_int(args, &option))
486 return 0;
487 uopt->lastblock = option;
6da80894
MS		 488 if (!remount)
489 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
cb00ea35
CG		 490 break;
491 case Opt_anchor:
492 if (match_int(args, &option))
493 return 0;
494 uopt->anchor = option;
495 break;
496 case Opt_volume:
497 if (match_int(args, &option))
498 return 0;
499 uopt->volume = option;
500 break;
501 case Opt_partition:
502 if (match_int(args, &option))
503 return 0;
504 uopt->partition = option;
505 break;
506 case Opt_fileset:
507 if (match_int(args, &option))
508 return 0;
509 uopt->fileset = option;
510 break;
511 case Opt_rootdir:
512 if (match_int(args, &option))
513 return 0;
514 uopt->rootdir = option;
515 break;
516 case Opt_utf8:
517 uopt->flags |= (1 << UDF_FLAG_UTF8);
518 break;
1da177e4 519#ifdef CONFIG_UDF_NLS
cb00ea35
CG		 520 case Opt_iocharset:
521 uopt->nls_map = load_nls(args[0].from);
522 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
523 break;
1da177e4 524#endif
cb00ea35
CG		 525 case Opt_uignore:
526 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
527 break;
528 case Opt_uforget:
529 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
530 break;
531 case Opt_gignore:
532 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
533 break;
534 case Opt_gforget:
535 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
536 break;
7ac9bcd5
MS		 537 case Opt_fmode:
538 if (match_octal(args, &option))
539 return 0;
540 uopt->fmode = option & 0777;
541 break;
542 case Opt_dmode:
543 if (match_octal(args, &option))
544 return 0;
545 uopt->dmode = option & 0777;
546 break;
cb00ea35
CG		 547 default:
548 printk(KERN_ERR "udf: bad mount option \"%s\" "
549 "or missing value\n", p);
1da177e4
LT		 550 return 0;
551 }
552 }
553 return 1;
554}
555
cb00ea35 556static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
1da177e4
LT		 557{
558 struct udf_options uopt;
6c79e987 559 struct udf_sb_info *sbi = UDF_SB(sb);
c79d967d 560 int error = 0;
1da177e4 561
6c79e987
MS		 562 uopt.flags = sbi->s_flags;
563 uopt.uid = sbi->s_uid;
564 uopt.gid = sbi->s_gid;
565 uopt.umask = sbi->s_umask;
7ac9bcd5
MS		 566 uopt.fmode = sbi->s_fmode;
567 uopt.dmode = sbi->s_dmode;
1da177e4 568
6da80894 569 if (!udf_parse_options(options, &uopt, true))
1da177e4
LT		 570 return -EINVAL;
571
337eb00a 572 lock_kernel();
6c79e987
MS		 573 sbi->s_flags = uopt.flags;
574 sbi->s_uid = uopt.uid;
575 sbi->s_gid = uopt.gid;
576 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 577 sbi->s_fmode = uopt.fmode;
578 sbi->s_dmode = uopt.dmode;
1da177e4 579
6c79e987
MS		 580 if (sbi->s_lvid_bh) {
581 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
1da177e4
LT		 582 if (write_rev > UDF_MAX_WRITE_VERSION)
583 *flags |= MS_RDONLY;
584 }
585
c79d967d
CH		 586 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
587 goto out_unlock;
588
36350462 589 if (*flags & MS_RDONLY)
1da177e4 590 udf_close_lvid(sb);
36350462 591 else
1da177e4
LT		 592 udf_open_lvid(sb);
593
c79d967d 594out_unlock:
337eb00a 595 unlock_kernel();
c79d967d 596 return error;
1da177e4
LT		 597}
598
40346005
JK		 599/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
600/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
601static loff_t udf_check_vsd(struct super_block *sb)
1da177e4
LT		 602{
603 struct volStructDesc *vsd = NULL;
f4bcbbd9 604 loff_t sector = 32768;
1da177e4
LT		 605 int sectorsize;
606 struct buffer_head *bh = NULL;
cb00ea35
CG		 607 int nsr02 = 0;
608 int nsr03 = 0;
6c79e987 609 struct udf_sb_info *sbi;
1da177e4 610
6c79e987 611 sbi = UDF_SB(sb);
1da177e4
LT		 612 if (sb->s_blocksize < sizeof(struct volStructDesc))
613 sectorsize = sizeof(struct volStructDesc);
614 else
615 sectorsize = sb->s_blocksize;
616
6c79e987 617 sector += (sbi->s_session << sb->s_blocksize_bits);
1da177e4
LT		 618
619 udf_debug("Starting at sector %u (%ld byte sectors)\n",
706047a7
SM		 620 (unsigned int)(sector >> sb->s_blocksize_bits),
621 sb->s_blocksize);
1da177e4 622 /* Process the sequence (if applicable) */
cb00ea35 623 for (; !nsr02 && !nsr03; sector += sectorsize) {
1da177e4
LT		 624 /* Read a block */
625 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
626 if (!bh)
627 break;
628
629 /* Look for ISO descriptors */
630 vsd = (struct volStructDesc *)(bh->b_data +
3a71fc5d 631 (sector & (sb->s_blocksize - 1)));
1da177e4 632
cb00ea35 633 if (vsd->stdIdent[0] == 0) {
3bf25cb4 634 brelse(bh);
1da177e4 635 break;
3a71fc5d
MS		 636 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
637 VSD_STD_ID_LEN)) {
cb00ea35
CG		 638 switch (vsd->structType) {
639 case 0:
640 udf_debug("ISO9660 Boot Record found\n");
641 break;
642 case 1:
3a71fc5d
MS		 643 udf_debug("ISO9660 Primary Volume Descriptor "
644 "found\n");
cb00ea35
CG		 645 break;
646 case 2:
3a71fc5d
MS		 647 udf_debug("ISO9660 Supplementary Volume "
648 "Descriptor found\n");
cb00ea35
CG		 649 break;
650 case 3:
3a71fc5d
MS		 651 udf_debug("ISO9660 Volume Partition Descriptor "
652 "found\n");
cb00ea35
CG		 653 break;
654 case 255:
3a71fc5d
MS		 655 udf_debug("ISO9660 Volume Descriptor Set "
656 "Terminator found\n");
cb00ea35
CG		 657 break;
658 default:
659 udf_debug("ISO9660 VRS (%u) found\n",
660 vsd->structType);
661 break;
1da177e4 662 }
3a71fc5d
MS		 663 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
664 VSD_STD_ID_LEN))
665 ; /* nothing */
666 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
667 VSD_STD_ID_LEN)) {
3bf25cb4 668 brelse(bh);
1da177e4 669 break;
3a71fc5d
MS		 670 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
671 VSD_STD_ID_LEN))
1da177e4 672 nsr02 = sector;
3a71fc5d
MS		 673 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
674 VSD_STD_ID_LEN))
1da177e4 675 nsr03 = sector;
3bf25cb4 676 brelse(bh);
1da177e4
LT		 677 }
678
679 if (nsr03)
680 return nsr03;
681 else if (nsr02)
682 return nsr02;
6c79e987 683 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
1da177e4
LT		 684 return -1;
685 else
686 return 0;
687}
688
3a71fc5d 689static int udf_find_fileset(struct super_block *sb,
5ca4e4be
PE		 690 struct kernel_lb_addr *fileset,
691 struct kernel_lb_addr *root)
1da177e4
LT		 692{
693 struct buffer_head *bh = NULL;
694 long lastblock;
695 uint16_t ident;
6c79e987 696 struct udf_sb_info *sbi;
1da177e4
LT		 697
698 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 699 fileset->partitionReferenceNum != 0xFFFF) {
97e961fd 700 bh = udf_read_ptagged(sb, fileset, 0, &ident);
1da177e4 701
28de7948 702 if (!bh) {
1da177e4 703 return 1;
28de7948 704 } else if (ident != TAG_IDENT_FSD) {
3bf25cb4 705 brelse(bh);
1da177e4
LT		 706 return 1;
707 }
cb00ea35 708
1da177e4
LT		 709 }
710
6c79e987 711 sbi = UDF_SB(sb);
3a71fc5d
MS		 712 if (!bh) {
713 /* Search backwards through the partitions */
5ca4e4be 714 struct kernel_lb_addr newfileset;
1da177e4 715
28de7948 716/* --> cvg: FIXME - is it reasonable? */
1da177e4 717 return 1;
cb00ea35 718
6c79e987 719 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
cb00ea35
CG		 720 (newfileset.partitionReferenceNum != 0xFFFF &&
721 fileset->logicalBlockNum == 0xFFFFFFFF &&
722 fileset->partitionReferenceNum == 0xFFFF);
723 newfileset.partitionReferenceNum--) {
6c79e987
MS		 724 lastblock = sbi->s_partmaps
725 [newfileset.partitionReferenceNum]
726 .s_partition_len;
1da177e4
LT		 727 newfileset.logicalBlockNum = 0;
728
cb00ea35 729 do {
97e961fd 730 bh = udf_read_ptagged(sb, &newfileset, 0,
3a71fc5d 731 &ident);
cb00ea35
CG		 732 if (!bh) {
733 newfileset.logicalBlockNum++;
1da177e4
LT		 734 continue;
735 }
736
cb00ea35
CG		 737 switch (ident) {
738 case TAG_IDENT_SBD:
28de7948
CG		 739 {
740 struct spaceBitmapDesc *sp;
4b11111a
MS		 741 sp = (struct spaceBitmapDesc *)
742 bh->b_data;
28de7948
CG		 743 newfileset.logicalBlockNum += 1 +
744 ((le32_to_cpu(sp->numOfBytes) +
4b11111a
MS		 745 sizeof(struct spaceBitmapDesc)
746 - 1) >> sb->s_blocksize_bits);
28de7948
CG		 747 brelse(bh);
748 break;
749 }
cb00ea35 750 case TAG_IDENT_FSD:
28de7948
CG		 751 *fileset = newfileset;
752 break;
cb00ea35 753 default:
28de7948
CG		 754 newfileset.logicalBlockNum++;
755 brelse(bh);
756 bh = NULL;
757 break;
1da177e4 758 }
28de7948
CG		 759 } while (newfileset.logicalBlockNum < lastblock &&
760 fileset->logicalBlockNum == 0xFFFFFFFF &&
761 fileset->partitionReferenceNum == 0xFFFF);
1da177e4
LT		 762 }
763 }
764
765 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 766 fileset->partitionReferenceNum != 0xFFFF) && bh) {
1da177e4 767 udf_debug("Fileset at block=%d, partition=%d\n",
cb00ea35
CG		 768 fileset->logicalBlockNum,
769 fileset->partitionReferenceNum);
1da177e4 770
6c79e987 771 sbi->s_partition = fileset->partitionReferenceNum;
1da177e4 772 udf_load_fileset(sb, bh, root);
3bf25cb4 773 brelse(bh);
1da177e4
LT		 774 return 0;
775 }
776 return 1;
777}
778
c0eb31ed 779static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
1da177e4
LT		 780{
781 struct primaryVolDesc *pvoldesc;
ba9aadd8 782 struct ustr *instr, *outstr;
c0eb31ed
JK		 783 struct buffer_head *bh;
784 uint16_t ident;
ba9aadd8
MS		 785 int ret = 1;
786
787 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
788 if (!instr)
789 return 1;
790
791 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
792 if (!outstr)
793 goto out1;
c0eb31ed
JK		 794
795 bh = udf_read_tagged(sb, block, block, &ident);
796 if (!bh)
ba9aadd8
MS		 797 goto out2;
798
c0eb31ed 799 BUG_ON(ident != TAG_IDENT_PVD);
1da177e4
LT		 800
801 pvoldesc = (struct primaryVolDesc *)bh->b_data;
802
56774805
MS		 803 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
804 pvoldesc->recordingDateAndTime)) {
af15a298 805#ifdef UDFFS_DEBUG
5ca4e4be 806 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
cbf5676a 807 udf_debug("recording time %04u/%02u/%02u"
3a71fc5d 808 " %02u:%02u (%x)\n",
af15a298
MS		 809 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
810 ts->minute, le16_to_cpu(ts->typeAndTimezone));
811#endif
1da177e4
LT		 812 }
813
ba9aadd8
MS		 814 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
815 if (udf_CS0toUTF8(outstr, instr)) {
816 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
817 outstr->u_len > 31 ? 31 : outstr->u_len);
4b11111a
MS		 818 udf_debug("volIdent[] = '%s'\n",
819 UDF_SB(sb)->s_volume_ident);
1da177e4 820 }
1da177e4 821
ba9aadd8
MS		 822 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
823 if (udf_CS0toUTF8(outstr, instr))
824 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
c0eb31ed
JK		 825
826 brelse(bh);
ba9aadd8
MS		 827 ret = 0;
828out2:
829 kfree(outstr);
830out1:
831 kfree(instr);
832 return ret;
1da177e4
LT		 833}
834
bfb257a5
JK		 835static int udf_load_metadata_files(struct super_block *sb, int partition)
836{
837 struct udf_sb_info *sbi = UDF_SB(sb);
838 struct udf_part_map *map;
839 struct udf_meta_data *mdata;
5ca4e4be 840 struct kernel_lb_addr addr;
bfb257a5
JK		 841 int fe_error = 0;
842
843 map = &sbi->s_partmaps[partition];
844 mdata = &map->s_type_specific.s_metadata;
845
846 /* metadata address */
847 addr.logicalBlockNum = mdata->s_meta_file_loc;
848 addr.partitionReferenceNum = map->s_partition_num;
849
850 udf_debug("Metadata file location: block = %d part = %d\n",
851 addr.logicalBlockNum, addr.partitionReferenceNum);
852
97e961fd 853 mdata->s_metadata_fe = udf_iget(sb, &addr);
bfb257a5
JK		 854
855 if (mdata->s_metadata_fe == NULL) {
856 udf_warning(sb, __func__, "metadata inode efe not found, "
857 "will try mirror inode.");
858 fe_error = 1;
859 } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type !=
860 ICBTAG_FLAG_AD_SHORT) {
861 udf_warning(sb, __func__, "metadata inode efe does not have "
862 "short allocation descriptors!");
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) {
879 udf_error(sb, __func__, "mirror inode efe not found "
880 "and metadata inode is missing too, exiting...");
881 goto error_exit;
882 } else
883 udf_warning(sb, __func__, "mirror inode efe not found,"
884 " but metadata inode is OK");
885 } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type !=
886 ICBTAG_FLAG_AD_SHORT) {
887 udf_warning(sb, __func__, "mirror inode efe does not have "
888 "short allocation descriptors!");
889 iput(mdata->s_mirror_fe);
890 mdata->s_mirror_fe = NULL;
891 if (fe_error)
892 goto error_exit;
893 }
894
895 /*
896 * bitmap file entry
897 * Note:
898 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
899 */
900 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
901 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
902 addr.partitionReferenceNum = map->s_partition_num;
903
904 udf_debug("Bitmap file location: block = %d part = %d\n",
905 addr.logicalBlockNum, addr.partitionReferenceNum);
906
97e961fd 907 mdata->s_bitmap_fe = udf_iget(sb, &addr);
bfb257a5
JK		 908
909 if (mdata->s_bitmap_fe == NULL) {
910 if (sb->s_flags & MS_RDONLY)
911 udf_warning(sb, __func__, "bitmap inode efe "
912 "not found but it's ok since the disc"
913 " is mounted read-only");
914 else {
915 udf_error(sb, __func__, "bitmap inode efe not "
916 "found and attempted read-write mount");
917 goto error_exit;
918 }
919 }
920 }
921
922 udf_debug("udf_load_metadata_files Ok\n");
923
924 return 0;
925
926error_exit:
927 return 1;
928}
929
28de7948 930static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
5ca4e4be 931 struct kernel_lb_addr *root)
1da177e4
LT		 932{
933 struct fileSetDesc *fset;
934
935 fset = (struct fileSetDesc *)bh->b_data;
936
937 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
938
6c79e987 939 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1da177e4 940
cb00ea35
CG		 941 udf_debug("Rootdir at block=%d, partition=%d\n",
942 root->logicalBlockNum, root->partitionReferenceNum);
1da177e4
LT		 943}
944
883cb9d1
MS		 945int udf_compute_nr_groups(struct super_block *sb, u32 partition)
946{
947 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
8dee00bb
JL		 948 return DIV_ROUND_UP(map->s_partition_len +
949 (sizeof(struct spaceBitmapDesc) << 3),
950 sb->s_blocksize * 8);
883cb9d1
MS		 951}
952
66e1da3f
MS		 953static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
954{
66e1da3f
MS		 955 struct udf_bitmap *bitmap;
956 int nr_groups;
957 int size;
958
883cb9d1 959 nr_groups = udf_compute_nr_groups(sb, index);
66e1da3f
MS		 960 size = sizeof(struct udf_bitmap) +
961 (sizeof(struct buffer_head *) * nr_groups);
962
963 if (size <= PAGE_SIZE)
964 bitmap = kmalloc(size, GFP_KERNEL);
965 else
966 bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
967
968 if (bitmap == NULL) {
8e24eea7 969 udf_error(sb, __func__,
66e1da3f
MS		 970 "Unable to allocate space for bitmap "
971 "and %d buffer_head pointers", nr_groups);
972 return NULL;
973 }
974
975 memset(bitmap, 0x00, size);
976 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
977 bitmap->s_nr_groups = nr_groups;
978 return bitmap;
979}
980
3fb38dfa
JK		 981static int udf_fill_partdesc_info(struct super_block *sb,
982 struct partitionDesc *p, int p_index)
1da177e4 983{
6c79e987 984 struct udf_part_map *map;
165923fa 985 struct udf_sb_info *sbi = UDF_SB(sb);
3fb38dfa 986 struct partitionHeaderDesc *phd;
165923fa 987
3fb38dfa 988 map = &sbi->s_partmaps[p_index];
165923fa
MS		 989
990 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
991 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
992
993 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
994 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
995 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
996 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
997 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
998 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
999 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1000 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1001
706047a7
SM		 1002 udf_debug("Partition (%d type %x) starts at physical %d, "
1003 "block length %d\n", p_index,
165923fa
MS		 1004 map->s_partition_type, map->s_partition_root,
1005 map->s_partition_len);
1006
1007 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1008 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
3fb38dfa 1009 return 0;
165923fa
MS		 1010
1011 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1012 if (phd->unallocSpaceTable.extLength) {
5ca4e4be 1013 struct kernel_lb_addr loc = {
165923fa
MS		 1014 .logicalBlockNum = le32_to_cpu(
1015 phd->unallocSpaceTable.extPosition),
3fb38dfa 1016 .partitionReferenceNum = p_index,
165923fa
MS		 1017 };
1018
97e961fd 1019 map->s_uspace.s_table = udf_iget(sb, &loc);
165923fa
MS		 1020 if (!map->s_uspace.s_table) {
1021 udf_debug("cannot load unallocSpaceTable (part %d)\n",
3fb38dfa
JK		 1022 p_index);
1023 return 1;
165923fa
MS		 1024 }
1025 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1026 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
3fb38dfa 1027 p_index, map->s_uspace.s_table->i_ino);
165923fa
MS		 1028 }
1029
1030 if (phd->unallocSpaceBitmap.extLength) {
3fb38dfa
JK		 1031 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1032 if (!bitmap)
1033 return 1;
165923fa 1034 map->s_uspace.s_bitmap = bitmap;
2e0838fd 1035 bitmap->s_extLength = le32_to_cpu(
165923fa 1036 phd->unallocSpaceBitmap.extLength);
2e0838fd 1037 bitmap->s_extPosition = le32_to_cpu(
165923fa 1038 phd->unallocSpaceBitmap.extPosition);
2e0838fd 1039 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
3fb38dfa 1040 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
2e0838fd 1041 bitmap->s_extPosition);
165923fa
MS		 1042 }
1043
1044 if (phd->partitionIntegrityTable.extLength)
3fb38dfa 1045 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
165923fa
MS		 1046
1047 if (phd->freedSpaceTable.extLength) {
5ca4e4be 1048 struct kernel_lb_addr loc = {
165923fa
MS		 1049 .logicalBlockNum = le32_to_cpu(
1050 phd->freedSpaceTable.extPosition),
3fb38dfa 1051 .partitionReferenceNum = p_index,
165923fa
MS		 1052 };
1053
97e961fd 1054 map->s_fspace.s_table = udf_iget(sb, &loc);
165923fa 1055 if (!map->s_fspace.s_table) {
3fb38dfa
JK		 1056 udf_debug("cannot load freedSpaceTable (part %d)\n",
1057 p_index);
1058 return 1;
165923fa
MS		 1059 }
1060
1061 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1062 udf_debug("freedSpaceTable (part %d) @ %ld\n",
3fb38dfa 1063 p_index, map->s_fspace.s_table->i_ino);
165923fa
MS		 1064 }
1065
1066 if (phd->freedSpaceBitmap.extLength) {
3fb38dfa
JK		 1067 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1068 if (!bitmap)
1069 return 1;
165923fa 1070 map->s_fspace.s_bitmap = bitmap;
2e0838fd 1071 bitmap->s_extLength = le32_to_cpu(
165923fa 1072 phd->freedSpaceBitmap.extLength);
2e0838fd 1073 bitmap->s_extPosition = le32_to_cpu(
165923fa 1074 phd->freedSpaceBitmap.extPosition);
2e0838fd 1075 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
3fb38dfa 1076 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
2e0838fd 1077 bitmap->s_extPosition);
165923fa 1078 }
3fb38dfa
JK		 1079 return 0;
1080}
1081
e971b0b9
JK		 1082static void udf_find_vat_block(struct super_block *sb, int p_index,
1083 int type1_index, sector_t start_block)
38b74a53
JK		 1084{
1085 struct udf_sb_info *sbi = UDF_SB(sb);
1086 struct udf_part_map *map = &sbi->s_partmaps[p_index];
e971b0b9 1087 sector_t vat_block;
5ca4e4be 1088 struct kernel_lb_addr ino;
e971b0b9
JK		 1089
1090 /*
1091 * VAT file entry is in the last recorded block. Some broken disks have
1092 * it a few blocks before so try a bit harder...
1093 */
1094 ino.partitionReferenceNum = type1_index;
1095 for (vat_block = start_block;
1096 vat_block >= map->s_partition_root &&
1097 vat_block >= start_block - 3 &&
1098 !sbi->s_vat_inode; vat_block--) {
1099 ino.logicalBlockNum = vat_block - map->s_partition_root;
1100 sbi->s_vat_inode = udf_iget(sb, &ino);
1101 }
1102}
1103
1104static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1105{
1106 struct udf_sb_info *sbi = UDF_SB(sb);
1107 struct udf_part_map *map = &sbi->s_partmaps[p_index];
fa5e0815
JK		 1108 struct buffer_head *bh = NULL;
1109 struct udf_inode_info *vati;
1110 uint32_t pos;
1111 struct virtualAllocationTable20 *vat20;
4bf17af0 1112 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
38b74a53 1113
e971b0b9 1114 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
4bf17af0
JK		 1115 if (!sbi->s_vat_inode &&
1116 sbi->s_last_block != blocks - 1) {
1117 printk(KERN_NOTICE "UDF-fs: Failed to read VAT inode from the"
1118 " last recorded block (%lu), retrying with the last "
1119 "block of the device (%lu).\n",
1120 (unsigned long)sbi->s_last_block,
1121 (unsigned long)blocks - 1);
e971b0b9 1122 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
4bf17af0 1123 }
38b74a53
JK		 1124 if (!sbi->s_vat_inode)
1125 return 1;
1126
1127 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
47c9358a 1128 map->s_type_specific.s_virtual.s_start_offset = 0;
38b74a53
JK		 1129 map->s_type_specific.s_virtual.s_num_entries =
1130 (sbi->s_vat_inode->i_size - 36) >> 2;
1131 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
fa5e0815
JK		 1132 vati = UDF_I(sbi->s_vat_inode);
1133 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1134 pos = udf_block_map(sbi->s_vat_inode, 0);
1135 bh = sb_bread(sb, pos);
1136 if (!bh)
1137 return 1;
1138 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1139 } else {
1140 vat20 = (struct virtualAllocationTable20 *)
1141 vati->i_ext.i_data;
1142 }
38b74a53 1143
38b74a53 1144 map->s_type_specific.s_virtual.s_start_offset =
47c9358a 1145 le16_to_cpu(vat20->lengthHeader);
38b74a53
JK		 1146 map->s_type_specific.s_virtual.s_num_entries =
1147 (sbi->s_vat_inode->i_size -
1148 map->s_type_specific.s_virtual.
1149 s_start_offset) >> 2;
1150 brelse(bh);
1151 }
1152 return 0;
1153}
1154
3fb38dfa
JK		 1155static int udf_load_partdesc(struct super_block *sb, sector_t block)
1156{
1157 struct buffer_head *bh;
1158 struct partitionDesc *p;
1159 struct udf_part_map *map;
1160 struct udf_sb_info *sbi = UDF_SB(sb);
38b74a53 1161 int i, type1_idx;
3fb38dfa
JK		 1162 uint16_t partitionNumber;
1163 uint16_t ident;
1164 int ret = 0;
1165
1166 bh = udf_read_tagged(sb, block, block, &ident);
1167 if (!bh)
1168 return 1;
1169 if (ident != TAG_IDENT_PD)
1170 goto out_bh;
1171
1172 p = (struct partitionDesc *)bh->b_data;
1173 partitionNumber = le16_to_cpu(p->partitionNumber);
38b74a53 1174
bfb257a5 1175 /* First scan for TYPE1, SPARABLE and METADATA partitions */
3fb38dfa
JK		 1176 for (i = 0; i < sbi->s_partitions; i++) {
1177 map = &sbi->s_partmaps[i];
1178 udf_debug("Searching map: (%d == %d)\n",
1179 map->s_partition_num, partitionNumber);
38b74a53
JK		 1180 if (map->s_partition_num == partitionNumber &&
1181 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1182 map->s_partition_type == UDF_SPARABLE_MAP15))
3fb38dfa
JK		 1183 break;
1184 }
1185
38b74a53 1186 if (i >= sbi->s_partitions) {
3fb38dfa
JK		 1187 udf_debug("Partition (%d) not found in partition map\n",
1188 partitionNumber);
1189 goto out_bh;
1190 }
165923fa 1191
3fb38dfa 1192 ret = udf_fill_partdesc_info(sb, p, i);
38b74a53
JK		 1193
1194 /*
bfb257a5
JK		 1195 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1196 * PHYSICAL partitions are already set up
38b74a53
JK		 1197 */
1198 type1_idx = i;
1199 for (i = 0; i < sbi->s_partitions; i++) {
1200 map = &sbi->s_partmaps[i];
1201
1202 if (map->s_partition_num == partitionNumber &&
1203 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
bfb257a5
JK		 1204 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1205 map->s_partition_type == UDF_METADATA_MAP25))
38b74a53
JK		 1206 break;
1207 }
1208
1209 if (i >= sbi->s_partitions)
1210 goto out_bh;
1211
1212 ret = udf_fill_partdesc_info(sb, p, i);
1213 if (ret)
1214 goto out_bh;
1215
bfb257a5
JK		 1216 if (map->s_partition_type == UDF_METADATA_MAP25) {
1217 ret = udf_load_metadata_files(sb, i);
1218 if (ret) {
1219 printk(KERN_ERR "UDF-fs: error loading MetaData "
1220 "partition map %d\n", i);
1221 goto out_bh;
1222 }
1223 } else {
1224 ret = udf_load_vat(sb, i, type1_idx);
1225 if (ret)
1226 goto out_bh;
1227 /*
1228 * Mark filesystem read-only if we have a partition with
1229 * virtual map since we don't handle writing to it (we
1230 * overwrite blocks instead of relocating them).
1231 */
1232 sb->s_flags |= MS_RDONLY;
1233 printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only "
1234 "because writing to pseudooverwrite partition is "
1235 "not implemented.\n");
1236 }
c0eb31ed 1237out_bh:
2e0838fd 1238 /* In case loading failed, we handle cleanup in udf_fill_super */
c0eb31ed
JK		 1239 brelse(bh);
1240 return ret;
1da177e4
LT		 1241}
1242
c0eb31ed 1243static int udf_load_logicalvol(struct super_block *sb, sector_t block,
5ca4e4be 1244 struct kernel_lb_addr *fileset)
1da177e4
LT		 1245{
1246 struct logicalVolDesc *lvd;
1247 int i, j, offset;
1248 uint8_t type;
6c79e987 1249 struct udf_sb_info *sbi = UDF_SB(sb);
4b11111a 1250 struct genericPartitionMap *gpm;
c0eb31ed
JK		 1251 uint16_t ident;
1252 struct buffer_head *bh;
1253 int ret = 0;
1da177e4 1254
c0eb31ed
JK		 1255 bh = udf_read_tagged(sb, block, block, &ident);
1256 if (!bh)
1257 return 1;
1258 BUG_ON(ident != TAG_IDENT_LVD);
1da177e4
LT		 1259 lvd = (struct logicalVolDesc *)bh->b_data;
1260
dc5d39be 1261 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
c0eb31ed
JK		 1262 if (i != 0) {
1263 ret = i;
1264 goto out_bh;
1265 }
1da177e4 1266
cb00ea35 1267 for (i = 0, offset = 0;
6c79e987 1268 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
4b11111a
MS		 1269 i++, offset += gpm->partitionMapLength) {
1270 struct udf_part_map *map = &sbi->s_partmaps[i];
1271 gpm = (struct genericPartitionMap *)
1272 &(lvd->partitionMaps[offset]);
1273 type = gpm->partitionMapType;
cb00ea35 1274 if (type == 1) {
4b11111a
MS		 1275 struct genericPartitionMap1 *gpm1 =
1276 (struct genericPartitionMap1 *)gpm;
6c79e987
MS		 1277 map->s_partition_type = UDF_TYPE1_MAP15;
1278 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1279 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1280 map->s_partition_func = NULL;
cb00ea35 1281 } else if (type == 2) {
4b11111a
MS		 1282 struct udfPartitionMap2 *upm2 =
1283 (struct udfPartitionMap2 *)gpm;
1284 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1285 strlen(UDF_ID_VIRTUAL))) {
1286 u16 suf =
1287 le16_to_cpu(((__le16 *)upm2->partIdent.
1288 identSuffix)[0]);
c82a1275 1289 if (suf < 0x0200) {
4b11111a
MS		 1290 map->s_partition_type =
1291 UDF_VIRTUAL_MAP15;
1292 map->s_partition_func =
1293 udf_get_pblock_virt15;
c82a1275 1294 } else {
4b11111a
MS		 1295 map->s_partition_type =
1296 UDF_VIRTUAL_MAP20;
1297 map->s_partition_func =
1298 udf_get_pblock_virt20;
1da177e4 1299 }
4b11111a
MS		 1300 } else if (!strncmp(upm2->partIdent.ident,
1301 UDF_ID_SPARABLE,
1302 strlen(UDF_ID_SPARABLE))) {
1da177e4 1303 uint32_t loc;
1da177e4 1304 struct sparingTable *st;
4b11111a
MS		 1305 struct sparablePartitionMap *spm =
1306 (struct sparablePartitionMap *)gpm;
28de7948 1307
6c79e987 1308 map->s_partition_type = UDF_SPARABLE_MAP15;
4b11111a
MS		 1309 map->s_type_specific.s_sparing.s_packet_len =
1310 le16_to_cpu(spm->packetLength);
cb00ea35 1311 for (j = 0; j < spm->numSparingTables; j++) {
4b11111a
MS		 1312 struct buffer_head *bh2;
1313
1314 loc = le32_to_cpu(
1315 spm->locSparingTable[j]);
1316 bh2 = udf_read_tagged(sb, loc, loc,
1317 &ident);
1318 map->s_type_specific.s_sparing.
1319 s_spar_map[j] = bh2;
1320
165923fa
MS		 1321 if (bh2 == NULL)
1322 continue;
1323
1324 st = (struct sparingTable *)bh2->b_data;
1325 if (ident != 0 || strncmp(
1326 st->sparingIdent.ident,
1327 UDF_ID_SPARING,
1328 strlen(UDF_ID_SPARING))) {
1329 brelse(bh2);
1330 map->s_type_specific.s_sparing.
1331 s_spar_map[j] = NULL;
1da177e4
LT		 1332 }
1333 }
6c79e987 1334 map->s_partition_func = udf_get_pblock_spar15;
bfb257a5
JK		 1335 } else if (!strncmp(upm2->partIdent.ident,
1336 UDF_ID_METADATA,
1337 strlen(UDF_ID_METADATA))) {
1338 struct udf_meta_data *mdata =
1339 &map->s_type_specific.s_metadata;
1340 struct metadataPartitionMap *mdm =
1341 (struct metadataPartitionMap *)
1342 &(lvd->partitionMaps[offset]);
1343 udf_debug("Parsing Logical vol part %d "
1344 "type %d id=%s\n", i, type,
1345 UDF_ID_METADATA);
1346
1347 map->s_partition_type = UDF_METADATA_MAP25;
1348 map->s_partition_func = udf_get_pblock_meta25;
1349
1350 mdata->s_meta_file_loc =
1351 le32_to_cpu(mdm->metadataFileLoc);
1352 mdata->s_mirror_file_loc =
1353 le32_to_cpu(mdm->metadataMirrorFileLoc);
1354 mdata->s_bitmap_file_loc =
1355 le32_to_cpu(mdm->metadataBitmapFileLoc);
1356 mdata->s_alloc_unit_size =
1357 le32_to_cpu(mdm->allocUnitSize);
1358 mdata->s_align_unit_size =
1359 le16_to_cpu(mdm->alignUnitSize);
1360 mdata->s_dup_md_flag =
1361 mdm->flags & 0x01;
1362
1363 udf_debug("Metadata Ident suffix=0x%x\n",
1364 (le16_to_cpu(
1365 ((__le16 *)
1366 mdm->partIdent.identSuffix)[0])));
1367 udf_debug("Metadata part num=%d\n",
1368 le16_to_cpu(mdm->partitionNum));
1369 udf_debug("Metadata part alloc unit size=%d\n",
1370 le32_to_cpu(mdm->allocUnitSize));
1371 udf_debug("Metadata file loc=%d\n",
1372 le32_to_cpu(mdm->metadataFileLoc));
1373 udf_debug("Mirror file loc=%d\n",
1374 le32_to_cpu(mdm->metadataMirrorFileLoc));
1375 udf_debug("Bitmap file loc=%d\n",
1376 le32_to_cpu(mdm->metadataBitmapFileLoc));
1377 udf_debug("Duplicate Flag: %d %d\n",
1378 mdata->s_dup_md_flag, mdm->flags);
cb00ea35 1379 } else {
3a71fc5d
MS		 1380 udf_debug("Unknown ident: %s\n",
1381 upm2->partIdent.ident);
1da177e4
LT		 1382 continue;
1383 }
6c79e987
MS		 1384 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1385 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1da177e4
LT		 1386 }
1387 udf_debug("Partition (%d:%d) type %d on volume %d\n",
6c79e987
MS		 1388 i, map->s_partition_num, type,
1389 map->s_volumeseqnum);
1da177e4
LT		 1390 }
1391
cb00ea35 1392 if (fileset) {
5ca4e4be 1393 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1da177e4
LT		 1394
1395 *fileset = lelb_to_cpu(la->extLocation);
3a71fc5d
MS		 1396 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1397 "partition=%d\n", fileset->logicalBlockNum,
28de7948 1398 fileset->partitionReferenceNum);
1da177e4
LT		 1399 }
1400 if (lvd->integritySeqExt.extLength)
1401 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
28de7948 1402
c0eb31ed
JK		 1403out_bh:
1404 brelse(bh);
1405 return ret;
1da177e4
LT		 1406}
1407
1408/*
1409 * udf_load_logicalvolint
1410 *
1411 */
5ca4e4be 1412static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1da177e4
LT		 1413{
1414 struct buffer_head *bh = NULL;
1415 uint16_t ident;
6c79e987
MS		 1416 struct udf_sb_info *sbi = UDF_SB(sb);
1417 struct logicalVolIntegrityDesc *lvid;
1da177e4
LT		 1418
1419 while (loc.extLength > 0 &&
cb00ea35
CG		 1420 (bh = udf_read_tagged(sb, loc.extLocation,
1421 loc.extLocation, &ident)) &&
1422 ident == TAG_IDENT_LVID) {
6c79e987
MS		 1423 sbi->s_lvid_bh = bh;
1424 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
cb00ea35 1425
6c79e987 1426 if (lvid->nextIntegrityExt.extLength)
3a71fc5d 1427 udf_load_logicalvolint(sb,
6c79e987 1428 leea_to_cpu(lvid->nextIntegrityExt));
cb00ea35 1429
6c79e987 1430 if (sbi->s_lvid_bh != bh)
3bf25cb4 1431 brelse(bh);
1da177e4 1432 loc.extLength -= sb->s_blocksize;
cb00ea35 1433 loc.extLocation++;
1da177e4 1434 }
6c79e987 1435 if (sbi->s_lvid_bh != bh)
3bf25cb4 1436 brelse(bh);
1da177e4
LT		 1437}
1438
1439/*
1440 * udf_process_sequence
1441 *
1442 * PURPOSE
1443 * Process a main/reserve volume descriptor sequence.
1444 *
1445 * PRE-CONDITIONS
1446 * sb Pointer to _locked_ superblock.
1447 * block First block of first extent of the sequence.
1448 * lastblock Lastblock of first extent of the sequence.
1449 *
1450 * HISTORY
1451 * July 1, 1997 - Andrew E. Mileski
1452 * Written, tested, and released.
1453 */
200a3592 1454static noinline int udf_process_sequence(struct super_block *sb, long block,
5ca4e4be 1455 long lastblock, struct kernel_lb_addr *fileset)
1da177e4
LT		 1456{
1457 struct buffer_head *bh = NULL;
1458 struct udf_vds_record vds[VDS_POS_LENGTH];
4b11111a 1459 struct udf_vds_record *curr;
1da177e4
LT		 1460 struct generic_desc *gd;
1461 struct volDescPtr *vdp;
cb00ea35 1462 int done = 0;
1da177e4
LT		 1463 uint32_t vdsn;
1464 uint16_t ident;
1465 long next_s = 0, next_e = 0;
1466
1467 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1468
c0eb31ed
JK		 1469 /*
1470 * Read the main descriptor sequence and find which descriptors
1471 * are in it.
1472 */
cb00ea35 1473 for (; (!done && block <= lastblock); block++) {
1da177e4
LT		 1474
1475 bh = udf_read_tagged(sb, block, block, &ident);
c0eb31ed
JK		 1476 if (!bh) {
1477 printk(KERN_ERR "udf: Block %Lu of volume descriptor "
1478 "sequence is corrupted or we could not read "
1479 "it.\n", (unsigned long long)block);
1480 return 1;
1481 }
1da177e4
LT		 1482
1483 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1484 gd = (struct generic_desc *)bh->b_data;
1485 vdsn = le32_to_cpu(gd->volDescSeqNum);
cb00ea35 1486 switch (ident) {
28de7948 1487 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
4b11111a
MS		 1488 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1489 if (vdsn >= curr->volDescSeqNum) {
1490 curr->volDescSeqNum = vdsn;
1491 curr->block = block;
cb00ea35
CG		 1492 }
1493 break;
28de7948 1494 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
4b11111a
MS		 1495 curr = &vds[VDS_POS_VOL_DESC_PTR];
1496 if (vdsn >= curr->volDescSeqNum) {
1497 curr->volDescSeqNum = vdsn;
1498 curr->block = block;
cb00ea35
CG		 1499
1500 vdp = (struct volDescPtr *)bh->b_data;
4b11111a
MS		 1501 next_s = le32_to_cpu(
1502 vdp->nextVolDescSeqExt.extLocation);
1503 next_e = le32_to_cpu(
1504 vdp->nextVolDescSeqExt.extLength);
cb00ea35
CG		 1505 next_e = next_e >> sb->s_blocksize_bits;
1506 next_e += next_s;
1507 }
1508 break;
28de7948 1509 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
4b11111a
MS		 1510 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1511 if (vdsn >= curr->volDescSeqNum) {
1512 curr->volDescSeqNum = vdsn;
1513 curr->block = block;
cb00ea35
CG		 1514 }
1515 break;
28de7948 1516 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
4b11111a
MS		 1517 curr = &vds[VDS_POS_PARTITION_DESC];
1518 if (!curr->block)
1519 curr->block = block;
cb00ea35 1520 break;
28de7948 1521 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
4b11111a
MS		 1522 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1523 if (vdsn >= curr->volDescSeqNum) {
1524 curr->volDescSeqNum = vdsn;
1525 curr->block = block;
cb00ea35
CG		 1526 }
1527 break;
28de7948 1528 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
4b11111a
MS		 1529 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1530 if (vdsn >= curr->volDescSeqNum) {
1531 curr->volDescSeqNum = vdsn;
1532 curr->block = block;
cb00ea35
CG		 1533 }
1534 break;
28de7948 1535 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
cb00ea35
CG		 1536 vds[VDS_POS_TERMINATING_DESC].block = block;
1537 if (next_e) {
1538 block = next_s;
1539 lastblock = next_e;
1540 next_s = next_e = 0;
4b11111a 1541 } else
cb00ea35
CG		 1542 done = 1;
1543 break;
1da177e4 1544 }
3bf25cb4 1545 brelse(bh);
1da177e4 1546 }
c0eb31ed
JK		 1547 /*
1548 * Now read interesting descriptors again and process them
1549 * in a suitable order
1550 */
1551 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1552 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n");
1553 return 1;
1554 }
1555 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1556 return 1;
165923fa 1557
c0eb31ed
JK		 1558 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1559 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1560 return 1;
165923fa 1561
c0eb31ed
JK		 1562 if (vds[VDS_POS_PARTITION_DESC].block) {
1563 /*
1564 * We rescan the whole descriptor sequence to find
1565 * partition descriptor blocks and process them.
1566 */
1567 for (block = vds[VDS_POS_PARTITION_DESC].block;
1568 block < vds[VDS_POS_TERMINATING_DESC].block;
1569 block++)
1570 if (udf_load_partdesc(sb, block))
165923fa 1571 return 1;
1da177e4
LT		 1572 }
1573
1574 return 0;
1575}
1576
40346005
JK		 1577static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1578 struct kernel_lb_addr *fileset)
1da177e4 1579{
40346005
JK		 1580 struct anchorVolDescPtr *anchor;
1581 long main_s, main_e, reserve_s, reserve_e;
1582 struct udf_sb_info *sbi;
1da177e4 1583
40346005
JK		 1584 sbi = UDF_SB(sb);
1585 anchor = (struct anchorVolDescPtr *)bh->b_data;
1586
1587 /* Locate the main sequence */
1588 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1589 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1590 main_e = main_e >> sb->s_blocksize_bits;
1591 main_e += main_s;
1592
1593 /* Locate the reserve sequence */
1594 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1595 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1596 reserve_e = reserve_e >> sb->s_blocksize_bits;
1597 reserve_e += reserve_s;
1598
1599 /* Process the main & reserve sequences */
1600 /* responsible for finding the PartitionDesc(s) */
1601 if (!udf_process_sequence(sb, main_s, main_e, fileset))
1602 return 1;
1603 return !udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1da177e4
LT		 1604}
1605
40346005
JK		 1606/*
1607 * Check whether there is an anchor block in the given block and
1608 * load Volume Descriptor Sequence if so.
1609 */
1610static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1611 struct kernel_lb_addr *fileset)
1197e4df 1612{
40346005
JK		 1613 struct buffer_head *bh;
1614 uint16_t ident;
1615 int ret;
1197e4df 1616
40346005
JK		 1617 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1618 udf_fixed_to_variable(block) >=
1619 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1197e4df 1620 return 0;
40346005
JK		 1621
1622 bh = udf_read_tagged(sb, block, block, &ident);
1623 if (!bh)
1197e4df 1624 return 0;
40346005
JK		 1625 if (ident != TAG_IDENT_AVDP) {
1626 brelse(bh);
1197e4df
CL		 1627 return 0;
1628 }
40346005
JK		 1629 ret = udf_load_sequence(sb, bh, fileset);
1630 brelse(bh);
1631 return ret;
1197e4df
CL		 1632}
1633
40346005
JK		 1634/* Search for an anchor volume descriptor pointer */
1635static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
1636 struct kernel_lb_addr *fileset)
1da177e4 1637{
40346005 1638 sector_t last[6];
38b74a53 1639 int i;
40346005
JK		 1640 struct udf_sb_info *sbi = UDF_SB(sb);
1641 int last_count = 0;
1da177e4 1642
40346005
JK		 1643 /* First try user provided anchor */
1644 if (sbi->s_anchor) {
1645 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
1646 return lastblock;
1647 }
1648 /*
1649 * according to spec, anchor is in either:
1650 * block 256
1651 * lastblock-256
1652 * lastblock
1653 * however, if the disc isn't closed, it could be 512.
1654 */
1655 if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
1656 return lastblock;
1657 /*
1658 * The trouble is which block is the last one. Drives often misreport
1659 * this so we try various possibilities.
1660 */
1661 last[last_count++] = lastblock;
1662 if (lastblock >= 1)
1663 last[last_count++] = lastblock - 1;
1664 last[last_count++] = lastblock + 1;
1665 if (lastblock >= 2)
1666 last[last_count++] = lastblock - 2;
1667 if (lastblock >= 150)
1668 last[last_count++] = lastblock - 150;
1669 if (lastblock >= 152)
1670 last[last_count++] = lastblock - 152;
1da177e4 1671
40346005
JK		 1672 for (i = 0; i < last_count; i++) {
1673 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1674 sb->s_blocksize_bits)
28f7c4d4 1675 continue;
40346005
JK		 1676 if (udf_check_anchor_block(sb, last[i], fileset))
1677 return last[i];
1678 if (last[i] < 256)
28f7c4d4 1679 continue;
40346005
JK		 1680 if (udf_check_anchor_block(sb, last[i] - 256, fileset))
1681 return last[i];
1682 }
28f7c4d4 1683
40346005
JK		 1684 /* Finally try block 512 in case media is open */
1685 if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
1686 return last[0];
1687 return 0;
1688}
28f7c4d4 1689
40346005
JK		 1690/*
1691 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1692 * area specified by it. The function expects sbi->s_lastblock to be the last
1693 * block on the media.
1694 *
1695 * Return 1 if ok, 0 if not found.
1696 *
1697 */
1698static int udf_find_anchor(struct super_block *sb,
1699 struct kernel_lb_addr *fileset)
1700{
1701 sector_t lastblock;
1702 struct udf_sb_info *sbi = UDF_SB(sb);
28f7c4d4 1703
40346005
JK		 1704 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1705 if (lastblock)
1706 goto out;
1da177e4 1707
40346005
JK		 1708 /* No anchor found? Try VARCONV conversion of block numbers */
1709 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1710 /* Firstly, we try to not convert number of the last block */
1711 lastblock = udf_scan_anchors(sb,
1712 udf_variable_to_fixed(sbi->s_last_block),
1713 fileset);
1714 if (lastblock)
1715 goto out;
1da177e4 1716
40346005
JK		 1717 /* Secondly, we try with converted number of the last block */
1718 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1719 if (!lastblock) {
1720 /* VARCONV didn't help. Clear it. */
1721 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1722 return 0;
1da177e4 1723 }
40346005
JK		 1724out:
1725 sbi->s_last_block = lastblock;
1726 return 1;
1727}
1da177e4 1728
40346005
JK		 1729/*
1730 * Check Volume Structure Descriptor, find Anchor block and load Volume
1731 * Descriptor Sequence
1732 */
1733static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1734 int silent, struct kernel_lb_addr *fileset)
1735{
1736 struct udf_sb_info *sbi = UDF_SB(sb);
1737 loff_t nsr_off;
1738
1739 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1740 if (!silent)
1741 printk(KERN_WARNING "UDF-fs: Bad block size\n");
1742 return 0;
1743 }
1744 sbi->s_last_block = uopt->lastblock;
1745 if (!uopt->novrs) {
1746 /* Check that it is NSR02 compliant */
1747 nsr_off = udf_check_vsd(sb);
1748 if (!nsr_off) {
1749 if (!silent)
1750 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1751 return 0;
1752 }
1753 if (nsr_off == -1)
1754 udf_debug("Failed to read byte 32768. Assuming open "
1755 "disc. Skipping validity check\n");
1756 if (!sbi->s_last_block)
1757 sbi->s_last_block = udf_get_last_block(sb);
1758 } else {
1759 udf_debug("Validity check skipped because of novrs option\n");
28f7c4d4 1760 }
1da177e4 1761
40346005
JK		 1762 /* Look for anchor block and load Volume Descriptor Sequence */
1763 sbi->s_anchor = uopt->anchor;
1764 if (!udf_find_anchor(sb, fileset)) {
1765 if (!silent)
1766 printk(KERN_WARNING "UDF-fs: No anchor found\n");
1767 return 0;
1768 }
1769 return 1;
1da177e4
LT		 1770}
1771
1772static void udf_open_lvid(struct super_block *sb)
1773{
6c79e987
MS		 1774 struct udf_sb_info *sbi = UDF_SB(sb);
1775 struct buffer_head *bh = sbi->s_lvid_bh;
165923fa
MS		 1776 struct logicalVolIntegrityDesc *lvid;
1777 struct logicalVolIntegrityDescImpUse *lvidiu;
146bca72 1778
165923fa
MS		 1779 if (!bh)
1780 return;
165923fa
MS		 1781 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1782 lvidiu = udf_sb_lvidiu(sbi);
1783
1784 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1785 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1786 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1787 CURRENT_TIME);
146bca72 1788 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
165923fa
MS		 1789
1790 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1791 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1792 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1793
1794 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1795 mark_buffer_dirty(bh);
146bca72 1796 sbi->s_lvid_dirty = 0;
1da177e4
LT		 1797}
1798
1799static void udf_close_lvid(struct super_block *sb)
1800{
6c79e987
MS		 1801 struct udf_sb_info *sbi = UDF_SB(sb);
1802 struct buffer_head *bh = sbi->s_lvid_bh;
1803 struct logicalVolIntegrityDesc *lvid;
165923fa 1804 struct logicalVolIntegrityDescImpUse *lvidiu;
28de7948 1805
6c79e987
MS		 1806 if (!bh)
1807 return;
1808
1809 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
165923fa
MS		 1810 lvidiu = udf_sb_lvidiu(sbi);
1811 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1812 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1813 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1814 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1815 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1816 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1817 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1818 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1819 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1820 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1821
1822 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1823 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1824 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1825
1826 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1827 mark_buffer_dirty(bh);
146bca72 1828 sbi->s_lvid_dirty = 0;
1da177e4
LT		 1829}
1830
66e1da3f
MS		 1831static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1832{
1833 int i;
1834 int nr_groups = bitmap->s_nr_groups;
4b11111a
MS		 1835 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1836 nr_groups);
66e1da3f
MS		 1837
1838 for (i = 0; i < nr_groups; i++)
1839 if (bitmap->s_block_bitmap[i])
1840 brelse(bitmap->s_block_bitmap[i]);
1841
1842 if (size <= PAGE_SIZE)
1843 kfree(bitmap);
1844 else
1845 vfree(bitmap);
1846}
1847
2e0838fd
JK		 1848static void udf_free_partition(struct udf_part_map *map)
1849{
1850 int i;
bfb257a5 1851 struct udf_meta_data *mdata;
2e0838fd
JK		 1852
1853 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1854 iput(map->s_uspace.s_table);
1855 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1856 iput(map->s_fspace.s_table);
1857 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1858 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1859 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1860 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1861 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1862 for (i = 0; i < 4; i++)
1863 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
bfb257a5
JK		 1864 else if (map->s_partition_type == UDF_METADATA_MAP25) {
1865 mdata = &map->s_type_specific.s_metadata;
1866 iput(mdata->s_metadata_fe);
1867 mdata->s_metadata_fe = NULL;
1868
1869 iput(mdata->s_mirror_fe);
1870 mdata->s_mirror_fe = NULL;
1871
1872 iput(mdata->s_bitmap_fe);
1873 mdata->s_bitmap_fe = NULL;
1874 }
2e0838fd
JK		 1875}
1876
1da177e4
LT		 1877static int udf_fill_super(struct super_block *sb, void *options, int silent)
1878{
1879 int i;
40346005 1880 int ret;
cb00ea35 1881 struct inode *inode = NULL;
1da177e4 1882 struct udf_options uopt;
5ca4e4be 1883 struct kernel_lb_addr rootdir, fileset;
1da177e4
LT		 1884 struct udf_sb_info *sbi;
1885
1886 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1887 uopt.uid = -1;
1888 uopt.gid = -1;
1889 uopt.umask = 0;
87bc730c
MS		 1890 uopt.fmode = UDF_INVALID_MODE;
1891 uopt.dmode = UDF_INVALID_MODE;
1da177e4 1892
6c79e987 1893 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1da177e4
LT		 1894 if (!sbi)
1895 return -ENOMEM;
28de7948 1896
1da177e4 1897 sb->s_fs_info = sbi;
1da177e4 1898
1e7933de 1899 mutex_init(&sbi->s_alloc_mutex);
1da177e4 1900
6da80894 1901 if (!udf_parse_options((char *)options, &uopt, false))
1da177e4
LT		 1902 goto error_out;
1903
1904 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
cb00ea35 1905 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1da177e4 1906 udf_error(sb, "udf_read_super",
cb00ea35 1907 "utf8 cannot be combined with iocharset\n");
1da177e4
LT		 1908 goto error_out;
1909 }
1910#ifdef CONFIG_UDF_NLS
cb00ea35 1911 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1da177e4
LT		 1912 uopt.nls_map = load_nls_default();
1913 if (!uopt.nls_map)
1914 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1915 else
1916 udf_debug("Using default NLS map\n");
1917 }
1918#endif
1919 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1920 uopt.flags |= (1 << UDF_FLAG_UTF8);
1921
1922 fileset.logicalBlockNum = 0xFFFFFFFF;
1923 fileset.partitionReferenceNum = 0xFFFF;
1924
6c79e987
MS		 1925 sbi->s_flags = uopt.flags;
1926 sbi->s_uid = uopt.uid;
1927 sbi->s_gid = uopt.gid;
1928 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 1929 sbi->s_fmode = uopt.fmode;
1930 sbi->s_dmode = uopt.dmode;
6c79e987 1931 sbi->s_nls_map = uopt.nls_map;
1da177e4 1932
cb00ea35 1933 if (uopt.session == 0xFFFFFFFF)
6c79e987 1934 sbi->s_session = udf_get_last_session(sb);
1da177e4 1935 else
6c79e987 1936 sbi->s_session = uopt.session;
1da177e4 1937
6c79e987 1938 udf_debug("Multi-session=%d\n", sbi->s_session);
1da177e4 1939
40346005
JK		 1940 /* Fill in the rest of the superblock */
1941 sb->s_op = &udf_sb_ops;
1942 sb->s_export_op = &udf_export_ops;
123e9caf 1943
40346005
JK		 1944 sb->s_dirt = 0;
1945 sb->s_magic = UDF_SUPER_MAGIC;
1946 sb->s_time_gran = 1000;
1947
1197e4df 1948 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
40346005 1949 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 1950 } else {
e1defc4f 1951 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
40346005
JK		 1952 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1953 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1197e4df
CL		 1954 if (!silent)
1955 printk(KERN_NOTICE
1956 "UDF-fs: Rescanning with blocksize "
1957 "%d\n", UDF_DEFAULT_BLOCKSIZE);
1958 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
40346005 1959 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1197e4df 1960 }
1da177e4 1961 }
40346005 1962 if (!ret) {
3a71fc5d 1963 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
1da177e4
LT		 1964 goto error_out;
1965 }
1966
6c79e987 1967 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1da177e4 1968
6c79e987 1969 if (sbi->s_lvid_bh) {
4b11111a
MS		 1970 struct logicalVolIntegrityDescImpUse *lvidiu =
1971 udf_sb_lvidiu(sbi);
6c79e987
MS		 1972 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1973 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
4b11111a
MS		 1974 /* uint16_t maxUDFWriteRev =
1975 le16_to_cpu(lvidiu->maxUDFWriteRev); */
1da177e4 1976
cb00ea35 1977 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
4b11111a
MS		 1978 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
1979 "(max is %x)\n",
6c79e987 1980 le16_to_cpu(lvidiu->minUDFReadRev),
cb00ea35 1981 UDF_MAX_READ_VERSION);
1da177e4 1982 goto error_out;
4b11111a 1983 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
1da177e4 1984 sb->s_flags |= MS_RDONLY;
1da177e4 1985
6c79e987 1986 sbi->s_udfrev = minUDFWriteRev;
1da177e4
LT		 1987
1988 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
1989 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
1990 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
1991 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
1992 }
1993
6c79e987 1994 if (!sbi->s_partitions) {
3a71fc5d 1995 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
1da177e4
LT		 1996 goto error_out;
1997 }
1998
4b11111a
MS		 1999 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2000 UDF_PART_FLAG_READ_ONLY) {
2001 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
2002 "forcing readonly mount\n");
39b3f6d6 2003 sb->s_flags |= MS_RDONLY;
c1a26e7d 2004 }
39b3f6d6 2005
cb00ea35 2006 if (udf_find_fileset(sb, &fileset, &rootdir)) {
3a71fc5d 2007 printk(KERN_WARNING "UDF-fs: No fileset found\n");
1da177e4
LT		 2008 goto error_out;
2009 }
2010
cb00ea35 2011 if (!silent) {
5ca4e4be 2012 struct timestamp ts;
56774805 2013 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
a9ca6635 2014 udf_info("UDF: Mounting volume '%s', "
28de7948 2015 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
56774805
MS		 2016 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
2017 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1da177e4
LT		 2018 }
2019 if (!(sb->s_flags & MS_RDONLY))
2020 udf_open_lvid(sb);
2021
2022 /* Assign the root inode */
2023 /* assign inodes by physical block number */
2024 /* perhaps it's not extensible enough, but for now ... */
97e961fd 2025 inode = udf_iget(sb, &rootdir);
cb00ea35 2026 if (!inode) {
4b11111a
MS		 2027 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
2028 "partition=%d\n",
cb00ea35 2029 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
1da177e4
LT		 2030 goto error_out;
2031 }
2032
2033 /* Allocate a dentry for the root inode */
2034 sb->s_root = d_alloc_root(inode);
cb00ea35 2035 if (!sb->s_root) {
3a71fc5d 2036 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
1da177e4
LT		 2037 iput(inode);
2038 goto error_out;
2039 }
31170b6a 2040 sb->s_maxbytes = MAX_LFS_FILESIZE;
1da177e4
LT		 2041 return 0;
2042
28de7948 2043error_out:
6c79e987
MS		 2044 if (sbi->s_vat_inode)
2045 iput(sbi->s_vat_inode);
2e0838fd
JK		 2046 if (sbi->s_partitions)
2047 for (i = 0; i < sbi->s_partitions; i++)
2048 udf_free_partition(&sbi->s_partmaps[i]);
1da177e4
LT		 2049#ifdef CONFIG_UDF_NLS
2050 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2051 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2052#endif
2053 if (!(sb->s_flags & MS_RDONLY))
2054 udf_close_lvid(sb);
6c79e987
MS		 2055 brelse(sbi->s_lvid_bh);
2056
2057 kfree(sbi->s_partmaps);
1da177e4
LT		 2058 kfree(sbi);
2059 sb->s_fs_info = NULL;
28de7948 2060
1da177e4
LT		 2061 return -EINVAL;
2062}
2063
b8145a76
AB		 2064static void udf_error(struct super_block *sb, const char *function,
2065 const char *fmt, ...)
1da177e4
LT		 2066{
2067 va_list args;
2068
cb00ea35 2069 if (!(sb->s_flags & MS_RDONLY)) {
1da177e4
LT		 2070 /* mark sb error */
2071 sb->s_dirt = 1;
2072 }
2073 va_start(args, fmt);
4a6e617a 2074 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1da177e4 2075 va_end(args);
3a71fc5d 2076 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
28de7948 2077 sb->s_id, function, error_buf);
1da177e4
LT		 2078}
2079
2080void udf_warning(struct super_block *sb, const char *function,
cb00ea35 2081 const char *fmt, ...)
1da177e4
LT		 2082{
2083 va_list args;
2084
cb00ea35 2085 va_start(args, fmt);
4a6e617a 2086 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1da177e4
LT		 2087 va_end(args);
2088 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
cb00ea35 2089 sb->s_id, function, error_buf);
1da177e4
LT		 2090}
2091
cb00ea35 2092static void udf_put_super(struct super_block *sb)
1da177e4
LT		 2093{
2094 int i;
6c79e987 2095 struct udf_sb_info *sbi;
1da177e4 2096
6c79e987 2097 sbi = UDF_SB(sb);
6cfd0148
CH		 2098
2099 lock_kernel();
2100
6c79e987
MS		 2101 if (sbi->s_vat_inode)
2102 iput(sbi->s_vat_inode);
2e0838fd
JK		 2103 if (sbi->s_partitions)
2104 for (i = 0; i < sbi->s_partitions; i++)
2105 udf_free_partition(&sbi->s_partmaps[i]);
1da177e4
LT		 2106#ifdef CONFIG_UDF_NLS
2107 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2108 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2109#endif
2110 if (!(sb->s_flags & MS_RDONLY))
2111 udf_close_lvid(sb);
6c79e987
MS		 2112 brelse(sbi->s_lvid_bh);
2113 kfree(sbi->s_partmaps);
1da177e4
LT		 2114 kfree(sb->s_fs_info);
2115 sb->s_fs_info = NULL;
6cfd0148
CH		 2116
2117 unlock_kernel();
1da177e4
LT		 2118}
2119
146bca72
JK		 2120static int udf_sync_fs(struct super_block *sb, int wait)
2121{
2122 struct udf_sb_info *sbi = UDF_SB(sb);
2123
2124 mutex_lock(&sbi->s_alloc_mutex);
2125 if (sbi->s_lvid_dirty) {
2126 /*
2127 * Blockdevice will be synced later so we don't have to submit
2128 * the buffer for IO
2129 */
2130 mark_buffer_dirty(sbi->s_lvid_bh);
2131 sb->s_dirt = 0;
2132 sbi->s_lvid_dirty = 0;
2133 }
2134 mutex_unlock(&sbi->s_alloc_mutex);
2135
2136 return 0;
2137}
2138
cb00ea35 2139static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 2140{
726c3342 2141 struct super_block *sb = dentry->d_sb;
6c79e987
MS		 2142 struct udf_sb_info *sbi = UDF_SB(sb);
2143 struct logicalVolIntegrityDescImpUse *lvidiu;
557f5a14 2144 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
6c79e987
MS		 2145
2146 if (sbi->s_lvid_bh != NULL)
2147 lvidiu = udf_sb_lvidiu(sbi);
2148 else
2149 lvidiu = NULL;
726c3342 2150
1da177e4
LT		 2151 buf->f_type = UDF_SUPER_MAGIC;
2152 buf->f_bsize = sb->s_blocksize;
6c79e987 2153 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1da177e4
LT		 2154 buf->f_bfree = udf_count_free(sb);
2155 buf->f_bavail = buf->f_bfree;
6c79e987
MS		 2156 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2157 le32_to_cpu(lvidiu->numDirs)) : 0)
2158 + buf->f_bfree;
1da177e4 2159 buf->f_ffree = buf->f_bfree;
cb00ea35 2160 buf->f_namelen = UDF_NAME_LEN - 2;
557f5a14
CL		 2161 buf->f_fsid.val[0] = (u32)id;
2162 buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4
LT		 2163
2164 return 0;
2165}
2166
4b11111a
MS		 2167static unsigned int udf_count_free_bitmap(struct super_block *sb,
2168 struct udf_bitmap *bitmap)
1da177e4
LT		 2169{
2170 struct buffer_head *bh = NULL;
2171 unsigned int accum = 0;
2172 int index;
2173 int block = 0, newblock;
5ca4e4be 2174 struct kernel_lb_addr loc;
1da177e4 2175 uint32_t bytes;
1da177e4
LT		 2176 uint8_t *ptr;
2177 uint16_t ident;
2178 struct spaceBitmapDesc *bm;
2179
2180 lock_kernel();
2181
2182 loc.logicalBlockNum = bitmap->s_extPosition;
6c79e987 2183 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
97e961fd 2184 bh = udf_read_ptagged(sb, &loc, 0, &ident);
1da177e4 2185
cb00ea35 2186 if (!bh) {
1da177e4
LT		 2187 printk(KERN_ERR "udf: udf_count_free failed\n");
2188 goto out;
cb00ea35 2189 } else if (ident != TAG_IDENT_SBD) {
3bf25cb4 2190 brelse(bh);
1da177e4
LT		 2191 printk(KERN_ERR "udf: udf_count_free failed\n");
2192 goto out;
2193 }
2194
2195 bm = (struct spaceBitmapDesc *)bh->b_data;
2196 bytes = le32_to_cpu(bm->numOfBytes);
28de7948
CG		 2197 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2198 ptr = (uint8_t *)bh->b_data;
1da177e4 2199
cb00ea35 2200 while (bytes > 0) {
01b954a3
MS		 2201 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2202 accum += bitmap_weight((const unsigned long *)(ptr + index),
2203 cur_bytes * 8);
2204 bytes -= cur_bytes;
cb00ea35 2205 if (bytes) {
3bf25cb4 2206 brelse(bh);
97e961fd 2207 newblock = udf_get_lb_pblock(sb, &loc, ++block);
1da177e4 2208 bh = udf_tread(sb, newblock);
cb00ea35 2209 if (!bh) {
1da177e4
LT		 2210 udf_debug("read failed\n");
2211 goto out;
2212 }
2213 index = 0;
28de7948 2214 ptr = (uint8_t *)bh->b_data;
1da177e4
LT		 2215 }
2216 }
3bf25cb4 2217 brelse(bh);
1da177e4 2218
28de7948 2219out:
1da177e4
LT		 2220 unlock_kernel();
2221
2222 return accum;
2223}
2224
4b11111a
MS		 2225static unsigned int udf_count_free_table(struct super_block *sb,
2226 struct inode *table)
1da177e4
LT		 2227{
2228 unsigned int accum = 0;
ff116fc8 2229 uint32_t elen;
5ca4e4be 2230 struct kernel_lb_addr eloc;
1da177e4 2231 int8_t etype;
ff116fc8 2232 struct extent_position epos;
1da177e4
LT		 2233
2234 lock_kernel();
2235
c0b34438 2236 epos.block = UDF_I(table)->i_location;
ff116fc8
JK		 2237 epos.offset = sizeof(struct unallocSpaceEntry);
2238 epos.bh = NULL;
1da177e4 2239
3a71fc5d 2240 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
1da177e4 2241 accum += (elen >> table->i_sb->s_blocksize_bits);
3a71fc5d 2242
3bf25cb4 2243 brelse(epos.bh);
1da177e4
LT		 2244
2245 unlock_kernel();
2246
2247 return accum;
2248}
cb00ea35
CG		 2249
2250static unsigned int udf_count_free(struct super_block *sb)
1da177e4
LT		 2251{
2252 unsigned int accum = 0;
6c79e987
MS		 2253 struct udf_sb_info *sbi;
2254 struct udf_part_map *map;
1da177e4 2255
6c79e987
MS		 2256 sbi = UDF_SB(sb);
2257 if (sbi->s_lvid_bh) {
4b11111a
MS		 2258 struct logicalVolIntegrityDesc *lvid =
2259 (struct logicalVolIntegrityDesc *)
2260 sbi->s_lvid_bh->b_data;
6c79e987 2261 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
4b11111a
MS		 2262 accum = le32_to_cpu(
2263 lvid->freeSpaceTable[sbi->s_partition]);
1da177e4
LT		 2264 if (accum == 0xFFFFFFFF)
2265 accum = 0;
2266 }
2267 }
2268
2269 if (accum)
2270 return accum;
2271
6c79e987
MS		 2272 map = &sbi->s_partmaps[sbi->s_partition];
2273 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
28de7948 2274 accum += udf_count_free_bitmap(sb,
6c79e987 2275 map->s_uspace.s_bitmap);
1da177e4 2276 }
6c79e987 2277 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
28de7948 2278 accum += udf_count_free_bitmap(sb,
6c79e987 2279 map->s_fspace.s_bitmap);
1da177e4
LT		 2280 }
2281 if (accum)
2282 return accum;
2283
6c79e987 2284 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
28de7948 2285 accum += udf_count_free_table(sb,
6c79e987 2286 map->s_uspace.s_table);
1da177e4 2287 }
6c79e987 2288 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
28de7948 2289 accum += udf_count_free_table(sb,
6c79e987 2290 map->s_fspace.s_table);
1da177e4
LT		 2291 }
2292
2293 return accum;
2294}
Clone of davem's net-next-2.6 tree