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udf: Some type fixes and cleanups
[mirror_ubuntu-jammy-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>
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 *);
84static void udf_write_super(struct super_block *);
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,
181 .write_super = udf_write_super,
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);
292 /*
293 * s_anchor[2] could be zeroed out in case there is no anchor
294 * in the specified block, but then the "anchor=N" option
295 * originally given by the user wasn't effective, so it's OK
296 * if we don't show it.
297 */
298 if (sbi->s_anchor[2] != 0)
299 seq_printf(seq, ",anchor=%u", sbi->s_anchor[2]);
300 /*
301 * volume, partition, fileset and rootdir seem to be ignored
302 * currently
303 */
304 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
305 seq_puts(seq, ",utf8");
306 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
307 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
308
309 return 0;
310}
311
1da177e4
LT		 312/*
313 * udf_parse_options
314 *
315 * PURPOSE
316 * Parse mount options.
317 *
318 * DESCRIPTION
319 * The following mount options are supported:
320 *
321 * gid= Set the default group.
322 * umask= Set the default umask.
7ac9bcd5
MS		 323 * mode= Set the default file permissions.
324 * dmode= Set the default directory permissions.
1da177e4
LT		 325 * uid= Set the default user.
326 * bs= Set the block size.
327 * unhide Show otherwise hidden files.
328 * undelete Show deleted files in lists.
329 * adinicb Embed data in the inode (default)
330 * noadinicb Don't embed data in the inode
331 * shortad Use short ad's
332 * longad Use long ad's (default)
333 * nostrict Unset strict conformance
334 * iocharset= Set the NLS character set
335 *
336 * The remaining are for debugging and disaster recovery:
337 *
28de7948 338 * novrs Skip volume sequence recognition
1da177e4
LT		 339 *
340 * The following expect a offset from 0.
341 *
342 * session= Set the CDROM session (default= last session)
343 * anchor= Override standard anchor location. (default= 256)
344 * volume= Override the VolumeDesc location. (unused)
345 * partition= Override the PartitionDesc location. (unused)
346 * lastblock= Set the last block of the filesystem/
347 *
348 * The following expect a offset from the partition root.
349 *
350 * fileset= Override the fileset block location. (unused)
351 * rootdir= Override the root directory location. (unused)
352 * WARNING: overriding the rootdir to a non-directory may
353 * yield highly unpredictable results.
354 *
355 * PRE-CONDITIONS
356 * options Pointer to mount options string.
357 * uopts Pointer to mount options variable.
358 *
359 * POST-CONDITIONS
360 * <return> 1 Mount options parsed okay.
361 * <return> 0 Error parsing mount options.
362 *
363 * HISTORY
364 * July 1, 1997 - Andrew E. Mileski
365 * Written, tested, and released.
366 */
28de7948 367
1da177e4
LT		 368enum {
369 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
370 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
371 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
372 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
373 Opt_rootdir, Opt_utf8, Opt_iocharset,
7ac9bcd5
MS		 374 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
375 Opt_fmode, Opt_dmode
1da177e4
LT		 376};
377
a447c093 378static const match_table_t tokens = {
28de7948
CG		 379 {Opt_novrs, "novrs"},
380 {Opt_nostrict, "nostrict"},
381 {Opt_bs, "bs=%u"},
382 {Opt_unhide, "unhide"},
383 {Opt_undelete, "undelete"},
384 {Opt_noadinicb, "noadinicb"},
385 {Opt_adinicb, "adinicb"},
386 {Opt_shortad, "shortad"},
387 {Opt_longad, "longad"},
388 {Opt_uforget, "uid=forget"},
389 {Opt_uignore, "uid=ignore"},
390 {Opt_gforget, "gid=forget"},
391 {Opt_gignore, "gid=ignore"},
392 {Opt_gid, "gid=%u"},
393 {Opt_uid, "uid=%u"},
394 {Opt_umask, "umask=%o"},
395 {Opt_session, "session=%u"},
396 {Opt_lastblock, "lastblock=%u"},
397 {Opt_anchor, "anchor=%u"},
398 {Opt_volume, "volume=%u"},
399 {Opt_partition, "partition=%u"},
400 {Opt_fileset, "fileset=%u"},
401 {Opt_rootdir, "rootdir=%u"},
402 {Opt_utf8, "utf8"},
403 {Opt_iocharset, "iocharset=%s"},
7ac9bcd5
MS		 404 {Opt_fmode, "mode=%o"},
405 {Opt_dmode, "dmode=%o"},
28de7948 406 {Opt_err, NULL}
1da177e4
LT		 407};
408
6da80894
MS		 409static int udf_parse_options(char *options, struct udf_options *uopt,
410 bool remount)
1da177e4
LT		 411{
412 char *p;
413 int option;
414
415 uopt->novrs = 0;
1da177e4
LT		 416 uopt->partition = 0xFFFF;
417 uopt->session = 0xFFFFFFFF;
418 uopt->lastblock = 0;
419 uopt->anchor = 0;
420 uopt->volume = 0xFFFFFFFF;
421 uopt->rootdir = 0xFFFFFFFF;
422 uopt->fileset = 0xFFFFFFFF;
423 uopt->nls_map = NULL;
424
425 if (!options)
426 return 1;
427
cb00ea35 428 while ((p = strsep(&options, ",")) != NULL) {
1da177e4
LT		 429 substring_t args[MAX_OPT_ARGS];
430 int token;
431 if (!*p)
432 continue;
433
434 token = match_token(p, tokens, args);
cb00ea35
CG		 435 switch (token) {
436 case Opt_novrs:
437 uopt->novrs = 1;
4136801a 438 break;
cb00ea35
CG		 439 case Opt_bs:
440 if (match_int(&args[0], &option))
441 return 0;
442 uopt->blocksize = option;
1197e4df 443 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
cb00ea35
CG		 444 break;
445 case Opt_unhide:
446 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
447 break;
448 case Opt_undelete:
449 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
450 break;
451 case Opt_noadinicb:
452 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
453 break;
454 case Opt_adinicb:
455 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
456 break;
457 case Opt_shortad:
458 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
459 break;
460 case Opt_longad:
461 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
462 break;
463 case Opt_gid:
464 if (match_int(args, &option))
465 return 0;
466 uopt->gid = option;
ca76d2d8 467 uopt->flags |= (1 << UDF_FLAG_GID_SET);
cb00ea35
CG		 468 break;
469 case Opt_uid:
470 if (match_int(args, &option))
471 return 0;
472 uopt->uid = option;
ca76d2d8 473 uopt->flags |= (1 << UDF_FLAG_UID_SET);
cb00ea35
CG		 474 break;
475 case Opt_umask:
476 if (match_octal(args, &option))
477 return 0;
478 uopt->umask = option;
479 break;
480 case Opt_nostrict:
481 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
482 break;
483 case Opt_session:
484 if (match_int(args, &option))
485 return 0;
486 uopt->session = option;
6da80894
MS		 487 if (!remount)
488 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
cb00ea35
CG		 489 break;
490 case Opt_lastblock:
491 if (match_int(args, &option))
492 return 0;
493 uopt->lastblock = option;
6da80894
MS		 494 if (!remount)
495 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
cb00ea35
CG		 496 break;
497 case Opt_anchor:
498 if (match_int(args, &option))
499 return 0;
500 uopt->anchor = option;
501 break;
502 case Opt_volume:
503 if (match_int(args, &option))
504 return 0;
505 uopt->volume = option;
506 break;
507 case Opt_partition:
508 if (match_int(args, &option))
509 return 0;
510 uopt->partition = option;
511 break;
512 case Opt_fileset:
513 if (match_int(args, &option))
514 return 0;
515 uopt->fileset = option;
516 break;
517 case Opt_rootdir:
518 if (match_int(args, &option))
519 return 0;
520 uopt->rootdir = option;
521 break;
522 case Opt_utf8:
523 uopt->flags |= (1 << UDF_FLAG_UTF8);
524 break;
1da177e4 525#ifdef CONFIG_UDF_NLS
cb00ea35
CG		 526 case Opt_iocharset:
527 uopt->nls_map = load_nls(args[0].from);
528 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
529 break;
1da177e4 530#endif
cb00ea35
CG		 531 case Opt_uignore:
532 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
533 break;
534 case Opt_uforget:
535 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
536 break;
537 case Opt_gignore:
538 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
539 break;
540 case Opt_gforget:
541 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
542 break;
7ac9bcd5
MS		 543 case Opt_fmode:
544 if (match_octal(args, &option))
545 return 0;
546 uopt->fmode = option & 0777;
547 break;
548 case Opt_dmode:
549 if (match_octal(args, &option))
550 return 0;
551 uopt->dmode = option & 0777;
552 break;
cb00ea35
CG		 553 default:
554 printk(KERN_ERR "udf: bad mount option \"%s\" "
555 "or missing value\n", p);
1da177e4
LT		 556 return 0;
557 }
558 }
559 return 1;
560}
561
bd45a420 562static void udf_write_super(struct super_block *sb)
1da177e4
LT		 563{
564 lock_kernel();
28de7948 565
1da177e4
LT		 566 if (!(sb->s_flags & MS_RDONLY))
567 udf_open_lvid(sb);
568 sb->s_dirt = 0;
28de7948 569
1da177e4
LT		 570 unlock_kernel();
571}
572
cb00ea35 573static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
1da177e4
LT		 574{
575 struct udf_options uopt;
6c79e987 576 struct udf_sb_info *sbi = UDF_SB(sb);
1da177e4 577
6c79e987
MS		 578 uopt.flags = sbi->s_flags;
579 uopt.uid = sbi->s_uid;
580 uopt.gid = sbi->s_gid;
581 uopt.umask = sbi->s_umask;
7ac9bcd5
MS		 582 uopt.fmode = sbi->s_fmode;
583 uopt.dmode = sbi->s_dmode;
1da177e4 584
6da80894 585 if (!udf_parse_options(options, &uopt, true))
1da177e4
LT		 586 return -EINVAL;
587
6c79e987
MS		 588 sbi->s_flags = uopt.flags;
589 sbi->s_uid = uopt.uid;
590 sbi->s_gid = uopt.gid;
591 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 592 sbi->s_fmode = uopt.fmode;
593 sbi->s_dmode = uopt.dmode;
1da177e4 594
6c79e987
MS		 595 if (sbi->s_lvid_bh) {
596 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
1da177e4
LT		 597 if (write_rev > UDF_MAX_WRITE_VERSION)
598 *flags |= MS_RDONLY;
599 }
600
601 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
602 return 0;
603 if (*flags & MS_RDONLY)
604 udf_close_lvid(sb);
605 else
606 udf_open_lvid(sb);
607
608 return 0;
609}
610
225feded 611static loff_t udf_vrs(struct super_block *sb, int silent)
1da177e4
LT		 612{
613 struct volStructDesc *vsd = NULL;
f4bcbbd9 614 loff_t sector = 32768;
1da177e4
LT		 615 int sectorsize;
616 struct buffer_head *bh = NULL;
cb00ea35
CG		 617 int iso9660 = 0;
618 int nsr02 = 0;
619 int nsr03 = 0;
6c79e987 620 struct udf_sb_info *sbi;
1da177e4
LT		 621
622 /* Block size must be a multiple of 512 */
623 if (sb->s_blocksize & 511)
624 return 0;
6c79e987 625 sbi = UDF_SB(sb);
1da177e4
LT		 626
627 if (sb->s_blocksize < sizeof(struct volStructDesc))
628 sectorsize = sizeof(struct volStructDesc);
629 else
630 sectorsize = sb->s_blocksize;
631
6c79e987 632 sector += (sbi->s_session << sb->s_blocksize_bits);
1da177e4
LT		 633
634 udf_debug("Starting at sector %u (%ld byte sectors)\n",
706047a7
SM		 635 (unsigned int)(sector >> sb->s_blocksize_bits),
636 sb->s_blocksize);
1da177e4 637 /* Process the sequence (if applicable) */
cb00ea35 638 for (; !nsr02 && !nsr03; sector += sectorsize) {
1da177e4
LT		 639 /* Read a block */
640 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
641 if (!bh)
642 break;
643
644 /* Look for ISO descriptors */
645 vsd = (struct volStructDesc *)(bh->b_data +
3a71fc5d 646 (sector & (sb->s_blocksize - 1)));
1da177e4 647
cb00ea35 648 if (vsd->stdIdent[0] == 0) {
3bf25cb4 649 brelse(bh);
1da177e4 650 break;
3a71fc5d
MS		 651 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
652 VSD_STD_ID_LEN)) {
1da177e4 653 iso9660 = sector;
cb00ea35
CG		 654 switch (vsd->structType) {
655 case 0:
656 udf_debug("ISO9660 Boot Record found\n");
657 break;
658 case 1:
3a71fc5d
MS		 659 udf_debug("ISO9660 Primary Volume Descriptor "
660 "found\n");
cb00ea35
CG		 661 break;
662 case 2:
3a71fc5d
MS		 663 udf_debug("ISO9660 Supplementary Volume "
664 "Descriptor found\n");
cb00ea35
CG		 665 break;
666 case 3:
3a71fc5d
MS		 667 udf_debug("ISO9660 Volume Partition Descriptor "
668 "found\n");
cb00ea35
CG		 669 break;
670 case 255:
3a71fc5d
MS		 671 udf_debug("ISO9660 Volume Descriptor Set "
672 "Terminator found\n");
cb00ea35
CG		 673 break;
674 default:
675 udf_debug("ISO9660 VRS (%u) found\n",
676 vsd->structType);
677 break;
1da177e4 678 }
3a71fc5d
MS		 679 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
680 VSD_STD_ID_LEN))
681 ; /* nothing */
682 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
683 VSD_STD_ID_LEN)) {
3bf25cb4 684 brelse(bh);
1da177e4 685 break;
3a71fc5d
MS		 686 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
687 VSD_STD_ID_LEN))
1da177e4 688 nsr02 = sector;
3a71fc5d
MS		 689 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
690 VSD_STD_ID_LEN))
1da177e4 691 nsr03 = sector;
3bf25cb4 692 brelse(bh);
1da177e4
LT		 693 }
694
695 if (nsr03)
696 return nsr03;
697 else if (nsr02)
698 return nsr02;
6c79e987 699 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
1da177e4
LT		 700 return -1;
701 else
702 return 0;
703}
704
705/*
423cf6dc 706 * Check whether there is an anchor block in the given block
1da177e4 707 */
e8183c24 708static int udf_check_anchor_block(struct super_block *sb, sector_t block)
1da177e4 709{
e8183c24 710 struct buffer_head *bh;
1da177e4 711 uint16_t ident;
423cf6dc 712
e8183c24
TJ		 713 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
714 udf_fixed_to_variable(block) >=
715 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
716 return 0;
423cf6dc 717
e8183c24 718 bh = udf_read_tagged(sb, block, block, &ident);
423cf6dc
JK		 719 if (!bh)
720 return 0;
423cf6dc 721 brelse(bh);
e8183c24
TJ		 722
723 return ident == TAG_IDENT_AVDP;
423cf6dc
JK		 724}
725
726/* Search for an anchor volume descriptor pointer */
e8183c24 727static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock)
423cf6dc 728{
5fb28aa2 729 sector_t last[6];
1da177e4 730 int i;
423cf6dc 731 struct udf_sb_info *sbi = UDF_SB(sb);
f90981fe
JK		 732 int last_count = 0;
733
734 last[last_count++] = lastblock;
735 if (lastblock >= 1)
736 last[last_count++] = lastblock - 1;
737 last[last_count++] = lastblock + 1;
738 if (lastblock >= 2)
739 last[last_count++] = lastblock - 2;
740 if (lastblock >= 150)
741 last[last_count++] = lastblock - 150;
742 if (lastblock >= 152)
743 last[last_count++] = lastblock - 152;
1da177e4 744
423cf6dc
JK		 745 /* according to spec, anchor is in either:
746 * block 256
747 * lastblock-256
748 * lastblock
749 * however, if the disc isn't closed, it could be 512 */
e8c96f8c 750
f90981fe 751 for (i = 0; i < last_count; i++) {
5fb28aa2
JK		 752 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
753 sb->s_blocksize_bits)
754 continue;
cb00ea35 755
e8183c24 756 if (udf_check_anchor_block(sb, last[i])) {
423cf6dc
JK		 757 sbi->s_anchor[0] = last[i];
758 sbi->s_anchor[1] = last[i] - 256;
759 return last[i];
760 }
cb00ea35 761
423cf6dc
JK		 762 if (last[i] < 256)
763 continue;
764
e8183c24 765 if (udf_check_anchor_block(sb, last[i] - 256)) {
423cf6dc
JK		 766 sbi->s_anchor[1] = last[i] - 256;
767 return last[i];
1da177e4
LT		 768 }
769 }
770
e8183c24 771 if (udf_check_anchor_block(sb, sbi->s_session + 256)) {
423cf6dc
JK		 772 sbi->s_anchor[0] = sbi->s_session + 256;
773 return last[0];
774 }
e8183c24 775 if (udf_check_anchor_block(sb, sbi->s_session + 512)) {
423cf6dc
JK		 776 sbi->s_anchor[0] = sbi->s_session + 512;
777 return last[0];
778 }
779 return 0;
780}
1da177e4 781
423cf6dc
JK		 782/*
783 * Find an anchor volume descriptor. The function expects sbi->s_lastblock to
784 * be the last block on the media.
785 *
786 * Return 1 if not found, 0 if ok
787 *
788 */
1197e4df 789static int udf_find_anchor(struct super_block *sb)
423cf6dc
JK		 790{
791 sector_t lastblock;
792 struct buffer_head *bh = NULL;
793 uint16_t ident;
794 int i;
1197e4df 795 int anchor_found = 0;
423cf6dc
JK		 796 struct udf_sb_info *sbi = UDF_SB(sb);
797
e8183c24 798 lastblock = udf_scan_anchors(sb, sbi->s_last_block);
423cf6dc
JK		 799 if (lastblock)
800 goto check_anchor;
801
802 /* No anchor found? Try VARCONV conversion of block numbers */
e8183c24 803 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
423cf6dc 804 /* Firstly, we try to not convert number of the last block */
e8183c24 805 lastblock = udf_scan_anchors(sb,
423cf6dc 806 udf_variable_to_fixed(sbi->s_last_block));
e8183c24 807 if (lastblock)
423cf6dc 808 goto check_anchor;
1da177e4 809
423cf6dc 810 /* Secondly, we try with converted number of the last block */
e8183c24
TJ		 811 lastblock = udf_scan_anchors(sb, sbi->s_last_block);
812 if (!lastblock) {
813 /* VARCONV didn't help. Clear it. */
814 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
815 }
423cf6dc
JK		 816
817check_anchor:
818 /*
819 * Check located anchors and the anchor block supplied via
820 * mount options
821 */
6c79e987 822 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
165923fa
MS		 823 if (!sbi->s_anchor[i])
824 continue;
825 bh = udf_read_tagged(sb, sbi->s_anchor[i],
826 sbi->s_anchor[i], &ident);
827 if (!bh)
828 sbi->s_anchor[i] = 0;
829 else {
830 brelse(bh);
423cf6dc 831 if (ident != TAG_IDENT_AVDP)
6c79e987 832 sbi->s_anchor[i] = 0;
1197e4df
CL		 833 else
834 anchor_found = 1;
1da177e4
LT		 835 }
836 }
837
6c79e987 838 sbi->s_last_block = lastblock;
1197e4df 839 return anchor_found;
1da177e4
LT		 840}
841
3a71fc5d 842static int udf_find_fileset(struct super_block *sb,
5ca4e4be
PE		 843 struct kernel_lb_addr *fileset,
844 struct kernel_lb_addr *root)
1da177e4
LT		 845{
846 struct buffer_head *bh = NULL;
847 long lastblock;
848 uint16_t ident;
6c79e987 849 struct udf_sb_info *sbi;
1da177e4
LT		 850
851 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 852 fileset->partitionReferenceNum != 0xFFFF) {
97e961fd 853 bh = udf_read_ptagged(sb, fileset, 0, &ident);
1da177e4 854
28de7948 855 if (!bh) {
1da177e4 856 return 1;
28de7948 857 } else if (ident != TAG_IDENT_FSD) {
3bf25cb4 858 brelse(bh);
1da177e4
LT		 859 return 1;
860 }
cb00ea35 861
1da177e4
LT		 862 }
863
6c79e987 864 sbi = UDF_SB(sb);
3a71fc5d
MS		 865 if (!bh) {
866 /* Search backwards through the partitions */
5ca4e4be 867 struct kernel_lb_addr newfileset;
1da177e4 868
28de7948 869/* --> cvg: FIXME - is it reasonable? */
1da177e4 870 return 1;
cb00ea35 871
6c79e987 872 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
cb00ea35
CG		 873 (newfileset.partitionReferenceNum != 0xFFFF &&
874 fileset->logicalBlockNum == 0xFFFFFFFF &&
875 fileset->partitionReferenceNum == 0xFFFF);
876 newfileset.partitionReferenceNum--) {
6c79e987
MS		 877 lastblock = sbi->s_partmaps
878 [newfileset.partitionReferenceNum]
879 .s_partition_len;
1da177e4
LT		 880 newfileset.logicalBlockNum = 0;
881
cb00ea35 882 do {
97e961fd 883 bh = udf_read_ptagged(sb, &newfileset, 0,
3a71fc5d 884 &ident);
cb00ea35
CG		 885 if (!bh) {
886 newfileset.logicalBlockNum++;
1da177e4
LT		 887 continue;
888 }
889
cb00ea35
CG		 890 switch (ident) {
891 case TAG_IDENT_SBD:
28de7948
CG		 892 {
893 struct spaceBitmapDesc *sp;
4b11111a
MS		 894 sp = (struct spaceBitmapDesc *)
895 bh->b_data;
28de7948
CG		 896 newfileset.logicalBlockNum += 1 +
897 ((le32_to_cpu(sp->numOfBytes) +
4b11111a
MS		 898 sizeof(struct spaceBitmapDesc)
899 - 1) >> sb->s_blocksize_bits);
28de7948
CG		 900 brelse(bh);
901 break;
902 }
cb00ea35 903 case TAG_IDENT_FSD:
28de7948
CG		 904 *fileset = newfileset;
905 break;
cb00ea35 906 default:
28de7948
CG		 907 newfileset.logicalBlockNum++;
908 brelse(bh);
909 bh = NULL;
910 break;
1da177e4 911 }
28de7948
CG		 912 } while (newfileset.logicalBlockNum < lastblock &&
913 fileset->logicalBlockNum == 0xFFFFFFFF &&
914 fileset->partitionReferenceNum == 0xFFFF);
1da177e4
LT		 915 }
916 }
917
918 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 919 fileset->partitionReferenceNum != 0xFFFF) && bh) {
1da177e4 920 udf_debug("Fileset at block=%d, partition=%d\n",
cb00ea35
CG		 921 fileset->logicalBlockNum,
922 fileset->partitionReferenceNum);
1da177e4 923
6c79e987 924 sbi->s_partition = fileset->partitionReferenceNum;
1da177e4 925 udf_load_fileset(sb, bh, root);
3bf25cb4 926 brelse(bh);
1da177e4
LT		 927 return 0;
928 }
929 return 1;
930}
931
c0eb31ed 932static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
1da177e4
LT		 933{
934 struct primaryVolDesc *pvoldesc;
ba9aadd8 935 struct ustr *instr, *outstr;
c0eb31ed
JK		 936 struct buffer_head *bh;
937 uint16_t ident;
ba9aadd8
MS		 938 int ret = 1;
939
940 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
941 if (!instr)
942 return 1;
943
944 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
945 if (!outstr)
946 goto out1;
c0eb31ed
JK		 947
948 bh = udf_read_tagged(sb, block, block, &ident);
949 if (!bh)
ba9aadd8
MS		 950 goto out2;
951
c0eb31ed 952 BUG_ON(ident != TAG_IDENT_PVD);
1da177e4
LT		 953
954 pvoldesc = (struct primaryVolDesc *)bh->b_data;
955
56774805
MS		 956 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
957 pvoldesc->recordingDateAndTime)) {
af15a298 958#ifdef UDFFS_DEBUG
5ca4e4be 959 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
cbf5676a 960 udf_debug("recording time %04u/%02u/%02u"
3a71fc5d 961 " %02u:%02u (%x)\n",
af15a298
MS		 962 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
963 ts->minute, le16_to_cpu(ts->typeAndTimezone));
964#endif
1da177e4
LT		 965 }
966
ba9aadd8
MS		 967 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
968 if (udf_CS0toUTF8(outstr, instr)) {
969 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
970 outstr->u_len > 31 ? 31 : outstr->u_len);
4b11111a
MS		 971 udf_debug("volIdent[] = '%s'\n",
972 UDF_SB(sb)->s_volume_ident);
1da177e4 973 }
1da177e4 974
ba9aadd8
MS		 975 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
976 if (udf_CS0toUTF8(outstr, instr))
977 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
c0eb31ed
JK		 978
979 brelse(bh);
ba9aadd8
MS		 980 ret = 0;
981out2:
982 kfree(outstr);
983out1:
984 kfree(instr);
985 return ret;
1da177e4
LT		 986}
987
bfb257a5
JK		 988static int udf_load_metadata_files(struct super_block *sb, int partition)
989{
990 struct udf_sb_info *sbi = UDF_SB(sb);
991 struct udf_part_map *map;
992 struct udf_meta_data *mdata;
5ca4e4be 993 struct kernel_lb_addr addr;
bfb257a5
JK		 994 int fe_error = 0;
995
996 map = &sbi->s_partmaps[partition];
997 mdata = &map->s_type_specific.s_metadata;
998
999 /* metadata address */
1000 addr.logicalBlockNum = mdata->s_meta_file_loc;
1001 addr.partitionReferenceNum = map->s_partition_num;
1002
1003 udf_debug("Metadata file location: block = %d part = %d\n",
1004 addr.logicalBlockNum, addr.partitionReferenceNum);
1005
97e961fd 1006 mdata->s_metadata_fe = udf_iget(sb, &addr);
bfb257a5
JK		 1007
1008 if (mdata->s_metadata_fe == NULL) {
1009 udf_warning(sb, __func__, "metadata inode efe not found, "
1010 "will try mirror inode.");
1011 fe_error = 1;
1012 } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type !=
1013 ICBTAG_FLAG_AD_SHORT) {
1014 udf_warning(sb, __func__, "metadata inode efe does not have "
1015 "short allocation descriptors!");
1016 fe_error = 1;
1017 iput(mdata->s_metadata_fe);
1018 mdata->s_metadata_fe = NULL;
1019 }
1020
1021 /* mirror file entry */
1022 addr.logicalBlockNum = mdata->s_mirror_file_loc;
1023 addr.partitionReferenceNum = map->s_partition_num;
1024
1025 udf_debug("Mirror metadata file location: block = %d part = %d\n",
1026 addr.logicalBlockNum, addr.partitionReferenceNum);
1027
97e961fd 1028 mdata->s_mirror_fe = udf_iget(sb, &addr);
bfb257a5
JK		 1029
1030 if (mdata->s_mirror_fe == NULL) {
1031 if (fe_error) {
1032 udf_error(sb, __func__, "mirror inode efe not found "
1033 "and metadata inode is missing too, exiting...");
1034 goto error_exit;
1035 } else
1036 udf_warning(sb, __func__, "mirror inode efe not found,"
1037 " but metadata inode is OK");
1038 } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type !=
1039 ICBTAG_FLAG_AD_SHORT) {
1040 udf_warning(sb, __func__, "mirror inode efe does not have "
1041 "short allocation descriptors!");
1042 iput(mdata->s_mirror_fe);
1043 mdata->s_mirror_fe = NULL;
1044 if (fe_error)
1045 goto error_exit;
1046 }
1047
1048 /*
1049 * bitmap file entry
1050 * Note:
1051 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1052 */
1053 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
1054 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
1055 addr.partitionReferenceNum = map->s_partition_num;
1056
1057 udf_debug("Bitmap file location: block = %d part = %d\n",
1058 addr.logicalBlockNum, addr.partitionReferenceNum);
1059
97e961fd 1060 mdata->s_bitmap_fe = udf_iget(sb, &addr);
bfb257a5
JK		 1061
1062 if (mdata->s_bitmap_fe == NULL) {
1063 if (sb->s_flags & MS_RDONLY)
1064 udf_warning(sb, __func__, "bitmap inode efe "
1065 "not found but it's ok since the disc"
1066 " is mounted read-only");
1067 else {
1068 udf_error(sb, __func__, "bitmap inode efe not "
1069 "found and attempted read-write mount");
1070 goto error_exit;
1071 }
1072 }
1073 }
1074
1075 udf_debug("udf_load_metadata_files Ok\n");
1076
1077 return 0;
1078
1079error_exit:
1080 return 1;
1081}
1082
28de7948 1083static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
5ca4e4be 1084 struct kernel_lb_addr *root)
1da177e4
LT		 1085{
1086 struct fileSetDesc *fset;
1087
1088 fset = (struct fileSetDesc *)bh->b_data;
1089
1090 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1091
6c79e987 1092 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1da177e4 1093
cb00ea35
CG		 1094 udf_debug("Rootdir at block=%d, partition=%d\n",
1095 root->logicalBlockNum, root->partitionReferenceNum);
1da177e4
LT		 1096}
1097
883cb9d1
MS		 1098int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1099{
1100 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
8dee00bb
JL		 1101 return DIV_ROUND_UP(map->s_partition_len +
1102 (sizeof(struct spaceBitmapDesc) << 3),
1103 sb->s_blocksize * 8);
883cb9d1
MS		 1104}
1105
66e1da3f
MS		 1106static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1107{
66e1da3f
MS		 1108 struct udf_bitmap *bitmap;
1109 int nr_groups;
1110 int size;
1111
883cb9d1 1112 nr_groups = udf_compute_nr_groups(sb, index);
66e1da3f
MS		 1113 size = sizeof(struct udf_bitmap) +
1114 (sizeof(struct buffer_head *) * nr_groups);
1115
1116 if (size <= PAGE_SIZE)
1117 bitmap = kmalloc(size, GFP_KERNEL);
1118 else
1119 bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
1120
1121 if (bitmap == NULL) {
8e24eea7 1122 udf_error(sb, __func__,
66e1da3f
MS		 1123 "Unable to allocate space for bitmap "
1124 "and %d buffer_head pointers", nr_groups);
1125 return NULL;
1126 }
1127
1128 memset(bitmap, 0x00, size);
1129 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
1130 bitmap->s_nr_groups = nr_groups;
1131 return bitmap;
1132}
1133
3fb38dfa
JK		 1134static int udf_fill_partdesc_info(struct super_block *sb,
1135 struct partitionDesc *p, int p_index)
1da177e4 1136{
6c79e987 1137 struct udf_part_map *map;
165923fa 1138 struct udf_sb_info *sbi = UDF_SB(sb);
3fb38dfa 1139 struct partitionHeaderDesc *phd;
165923fa 1140
3fb38dfa 1141 map = &sbi->s_partmaps[p_index];
165923fa
MS		 1142
1143 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1144 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1145
1146 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1147 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1148 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1149 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1150 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1151 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1152 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1153 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1154
706047a7
SM		 1155 udf_debug("Partition (%d type %x) starts at physical %d, "
1156 "block length %d\n", p_index,
165923fa
MS		 1157 map->s_partition_type, map->s_partition_root,
1158 map->s_partition_len);
1159
1160 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1161 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
3fb38dfa 1162 return 0;
165923fa
MS		 1163
1164 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1165 if (phd->unallocSpaceTable.extLength) {
5ca4e4be 1166 struct kernel_lb_addr loc = {
165923fa
MS		 1167 .logicalBlockNum = le32_to_cpu(
1168 phd->unallocSpaceTable.extPosition),
3fb38dfa 1169 .partitionReferenceNum = p_index,
165923fa
MS		 1170 };
1171
97e961fd 1172 map->s_uspace.s_table = udf_iget(sb, &loc);
165923fa
MS		 1173 if (!map->s_uspace.s_table) {
1174 udf_debug("cannot load unallocSpaceTable (part %d)\n",
3fb38dfa
JK		 1175 p_index);
1176 return 1;
165923fa
MS		 1177 }
1178 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1179 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
3fb38dfa 1180 p_index, map->s_uspace.s_table->i_ino);
165923fa
MS		 1181 }
1182
1183 if (phd->unallocSpaceBitmap.extLength) {
3fb38dfa
JK		 1184 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1185 if (!bitmap)
1186 return 1;
165923fa 1187 map->s_uspace.s_bitmap = bitmap;
2e0838fd 1188 bitmap->s_extLength = le32_to_cpu(
165923fa 1189 phd->unallocSpaceBitmap.extLength);
2e0838fd 1190 bitmap->s_extPosition = le32_to_cpu(
165923fa 1191 phd->unallocSpaceBitmap.extPosition);
2e0838fd 1192 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
3fb38dfa 1193 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
2e0838fd 1194 bitmap->s_extPosition);
165923fa
MS		 1195 }
1196
1197 if (phd->partitionIntegrityTable.extLength)
3fb38dfa 1198 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
165923fa
MS		 1199
1200 if (phd->freedSpaceTable.extLength) {
5ca4e4be 1201 struct kernel_lb_addr loc = {
165923fa
MS		 1202 .logicalBlockNum = le32_to_cpu(
1203 phd->freedSpaceTable.extPosition),
3fb38dfa 1204 .partitionReferenceNum = p_index,
165923fa
MS		 1205 };
1206
97e961fd 1207 map->s_fspace.s_table = udf_iget(sb, &loc);
165923fa 1208 if (!map->s_fspace.s_table) {
3fb38dfa
JK		 1209 udf_debug("cannot load freedSpaceTable (part %d)\n",
1210 p_index);
1211 return 1;
165923fa
MS		 1212 }
1213
1214 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1215 udf_debug("freedSpaceTable (part %d) @ %ld\n",
3fb38dfa 1216 p_index, map->s_fspace.s_table->i_ino);
165923fa
MS		 1217 }
1218
1219 if (phd->freedSpaceBitmap.extLength) {
3fb38dfa
JK		 1220 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1221 if (!bitmap)
1222 return 1;
165923fa 1223 map->s_fspace.s_bitmap = bitmap;
2e0838fd 1224 bitmap->s_extLength = le32_to_cpu(
165923fa 1225 phd->freedSpaceBitmap.extLength);
2e0838fd 1226 bitmap->s_extPosition = le32_to_cpu(
165923fa 1227 phd->freedSpaceBitmap.extPosition);
2e0838fd 1228 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
3fb38dfa 1229 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
2e0838fd 1230 bitmap->s_extPosition);
165923fa 1231 }
3fb38dfa
JK		 1232 return 0;
1233}
1234
38b74a53
JK		 1235static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1236{
1237 struct udf_sb_info *sbi = UDF_SB(sb);
1238 struct udf_part_map *map = &sbi->s_partmaps[p_index];
5ca4e4be 1239 struct kernel_lb_addr ino;
fa5e0815
JK		 1240 struct buffer_head *bh = NULL;
1241 struct udf_inode_info *vati;
1242 uint32_t pos;
1243 struct virtualAllocationTable20 *vat20;
38b74a53
JK		 1244
1245 /* VAT file entry is in the last recorded block */
1246 ino.partitionReferenceNum = type1_index;
1247 ino.logicalBlockNum = sbi->s_last_block - map->s_partition_root;
97e961fd 1248 sbi->s_vat_inode = udf_iget(sb, &ino);
38b74a53
JK		 1249 if (!sbi->s_vat_inode)
1250 return 1;
1251
1252 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
47c9358a 1253 map->s_type_specific.s_virtual.s_start_offset = 0;
38b74a53
JK		 1254 map->s_type_specific.s_virtual.s_num_entries =
1255 (sbi->s_vat_inode->i_size - 36) >> 2;
1256 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
fa5e0815
JK		 1257 vati = UDF_I(sbi->s_vat_inode);
1258 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1259 pos = udf_block_map(sbi->s_vat_inode, 0);
1260 bh = sb_bread(sb, pos);
1261 if (!bh)
1262 return 1;
1263 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1264 } else {
1265 vat20 = (struct virtualAllocationTable20 *)
1266 vati->i_ext.i_data;
1267 }
38b74a53 1268
38b74a53 1269 map->s_type_specific.s_virtual.s_start_offset =
47c9358a 1270 le16_to_cpu(vat20->lengthHeader);
38b74a53
JK		 1271 map->s_type_specific.s_virtual.s_num_entries =
1272 (sbi->s_vat_inode->i_size -
1273 map->s_type_specific.s_virtual.
1274 s_start_offset) >> 2;
1275 brelse(bh);
1276 }
1277 return 0;
1278}
1279
3fb38dfa
JK		 1280static int udf_load_partdesc(struct super_block *sb, sector_t block)
1281{
1282 struct buffer_head *bh;
1283 struct partitionDesc *p;
1284 struct udf_part_map *map;
1285 struct udf_sb_info *sbi = UDF_SB(sb);
38b74a53 1286 int i, type1_idx;
3fb38dfa
JK		 1287 uint16_t partitionNumber;
1288 uint16_t ident;
1289 int ret = 0;
1290
1291 bh = udf_read_tagged(sb, block, block, &ident);
1292 if (!bh)
1293 return 1;
1294 if (ident != TAG_IDENT_PD)
1295 goto out_bh;
1296
1297 p = (struct partitionDesc *)bh->b_data;
1298 partitionNumber = le16_to_cpu(p->partitionNumber);
38b74a53 1299
bfb257a5 1300 /* First scan for TYPE1, SPARABLE and METADATA partitions */
3fb38dfa
JK		 1301 for (i = 0; i < sbi->s_partitions; i++) {
1302 map = &sbi->s_partmaps[i];
1303 udf_debug("Searching map: (%d == %d)\n",
1304 map->s_partition_num, partitionNumber);
38b74a53
JK		 1305 if (map->s_partition_num == partitionNumber &&
1306 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1307 map->s_partition_type == UDF_SPARABLE_MAP15))
3fb38dfa
JK		 1308 break;
1309 }
1310
38b74a53 1311 if (i >= sbi->s_partitions) {
3fb38dfa
JK		 1312 udf_debug("Partition (%d) not found in partition map\n",
1313 partitionNumber);
1314 goto out_bh;
1315 }
165923fa 1316
3fb38dfa 1317 ret = udf_fill_partdesc_info(sb, p, i);
38b74a53
JK		 1318
1319 /*
bfb257a5
JK		 1320 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1321 * PHYSICAL partitions are already set up
38b74a53
JK		 1322 */
1323 type1_idx = i;
1324 for (i = 0; i < sbi->s_partitions; i++) {
1325 map = &sbi->s_partmaps[i];
1326
1327 if (map->s_partition_num == partitionNumber &&
1328 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
bfb257a5
JK		 1329 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1330 map->s_partition_type == UDF_METADATA_MAP25))
38b74a53
JK		 1331 break;
1332 }
1333
1334 if (i >= sbi->s_partitions)
1335 goto out_bh;
1336
1337 ret = udf_fill_partdesc_info(sb, p, i);
1338 if (ret)
1339 goto out_bh;
1340
bfb257a5
JK		 1341 if (map->s_partition_type == UDF_METADATA_MAP25) {
1342 ret = udf_load_metadata_files(sb, i);
1343 if (ret) {
1344 printk(KERN_ERR "UDF-fs: error loading MetaData "
1345 "partition map %d\n", i);
1346 goto out_bh;
1347 }
1348 } else {
1349 ret = udf_load_vat(sb, i, type1_idx);
1350 if (ret)
1351 goto out_bh;
1352 /*
1353 * Mark filesystem read-only if we have a partition with
1354 * virtual map since we don't handle writing to it (we
1355 * overwrite blocks instead of relocating them).
1356 */
1357 sb->s_flags |= MS_RDONLY;
1358 printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only "
1359 "because writing to pseudooverwrite partition is "
1360 "not implemented.\n");
1361 }
c0eb31ed 1362out_bh:
2e0838fd 1363 /* In case loading failed, we handle cleanup in udf_fill_super */
c0eb31ed
JK		 1364 brelse(bh);
1365 return ret;
1da177e4
LT		 1366}
1367
c0eb31ed 1368static int udf_load_logicalvol(struct super_block *sb, sector_t block,
5ca4e4be 1369 struct kernel_lb_addr *fileset)
1da177e4
LT		 1370{
1371 struct logicalVolDesc *lvd;
1372 int i, j, offset;
1373 uint8_t type;
6c79e987 1374 struct udf_sb_info *sbi = UDF_SB(sb);
4b11111a 1375 struct genericPartitionMap *gpm;
c0eb31ed
JK		 1376 uint16_t ident;
1377 struct buffer_head *bh;
1378 int ret = 0;
1da177e4 1379
c0eb31ed
JK		 1380 bh = udf_read_tagged(sb, block, block, &ident);
1381 if (!bh)
1382 return 1;
1383 BUG_ON(ident != TAG_IDENT_LVD);
1da177e4
LT		 1384 lvd = (struct logicalVolDesc *)bh->b_data;
1385
dc5d39be 1386 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
c0eb31ed
JK		 1387 if (i != 0) {
1388 ret = i;
1389 goto out_bh;
1390 }
1da177e4 1391
cb00ea35 1392 for (i = 0, offset = 0;
6c79e987 1393 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
4b11111a
MS		 1394 i++, offset += gpm->partitionMapLength) {
1395 struct udf_part_map *map = &sbi->s_partmaps[i];
1396 gpm = (struct genericPartitionMap *)
1397 &(lvd->partitionMaps[offset]);
1398 type = gpm->partitionMapType;
cb00ea35 1399 if (type == 1) {
4b11111a
MS		 1400 struct genericPartitionMap1 *gpm1 =
1401 (struct genericPartitionMap1 *)gpm;
6c79e987
MS		 1402 map->s_partition_type = UDF_TYPE1_MAP15;
1403 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1404 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1405 map->s_partition_func = NULL;
cb00ea35 1406 } else if (type == 2) {
4b11111a
MS		 1407 struct udfPartitionMap2 *upm2 =
1408 (struct udfPartitionMap2 *)gpm;
1409 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1410 strlen(UDF_ID_VIRTUAL))) {
1411 u16 suf =
1412 le16_to_cpu(((__le16 *)upm2->partIdent.
1413 identSuffix)[0]);
c82a1275 1414 if (suf < 0x0200) {
4b11111a
MS		 1415 map->s_partition_type =
1416 UDF_VIRTUAL_MAP15;
1417 map->s_partition_func =
1418 udf_get_pblock_virt15;
c82a1275 1419 } else {
4b11111a
MS		 1420 map->s_partition_type =
1421 UDF_VIRTUAL_MAP20;
1422 map->s_partition_func =
1423 udf_get_pblock_virt20;
1da177e4 1424 }
4b11111a
MS		 1425 } else if (!strncmp(upm2->partIdent.ident,
1426 UDF_ID_SPARABLE,
1427 strlen(UDF_ID_SPARABLE))) {
1da177e4 1428 uint32_t loc;
1da177e4 1429 struct sparingTable *st;
4b11111a
MS		 1430 struct sparablePartitionMap *spm =
1431 (struct sparablePartitionMap *)gpm;
28de7948 1432
6c79e987 1433 map->s_partition_type = UDF_SPARABLE_MAP15;
4b11111a
MS		 1434 map->s_type_specific.s_sparing.s_packet_len =
1435 le16_to_cpu(spm->packetLength);
cb00ea35 1436 for (j = 0; j < spm->numSparingTables; j++) {
4b11111a
MS		 1437 struct buffer_head *bh2;
1438
1439 loc = le32_to_cpu(
1440 spm->locSparingTable[j]);
1441 bh2 = udf_read_tagged(sb, loc, loc,
1442 &ident);
1443 map->s_type_specific.s_sparing.
1444 s_spar_map[j] = bh2;
1445
165923fa
MS		 1446 if (bh2 == NULL)
1447 continue;
1448
1449 st = (struct sparingTable *)bh2->b_data;
1450 if (ident != 0 || strncmp(
1451 st->sparingIdent.ident,
1452 UDF_ID_SPARING,
1453 strlen(UDF_ID_SPARING))) {
1454 brelse(bh2);
1455 map->s_type_specific.s_sparing.
1456 s_spar_map[j] = NULL;
1da177e4
LT		 1457 }
1458 }
6c79e987 1459 map->s_partition_func = udf_get_pblock_spar15;
bfb257a5
JK		 1460 } else if (!strncmp(upm2->partIdent.ident,
1461 UDF_ID_METADATA,
1462 strlen(UDF_ID_METADATA))) {
1463 struct udf_meta_data *mdata =
1464 &map->s_type_specific.s_metadata;
1465 struct metadataPartitionMap *mdm =
1466 (struct metadataPartitionMap *)
1467 &(lvd->partitionMaps[offset]);
1468 udf_debug("Parsing Logical vol part %d "
1469 "type %d id=%s\n", i, type,
1470 UDF_ID_METADATA);
1471
1472 map->s_partition_type = UDF_METADATA_MAP25;
1473 map->s_partition_func = udf_get_pblock_meta25;
1474
1475 mdata->s_meta_file_loc =
1476 le32_to_cpu(mdm->metadataFileLoc);
1477 mdata->s_mirror_file_loc =
1478 le32_to_cpu(mdm->metadataMirrorFileLoc);
1479 mdata->s_bitmap_file_loc =
1480 le32_to_cpu(mdm->metadataBitmapFileLoc);
1481 mdata->s_alloc_unit_size =
1482 le32_to_cpu(mdm->allocUnitSize);
1483 mdata->s_align_unit_size =
1484 le16_to_cpu(mdm->alignUnitSize);
1485 mdata->s_dup_md_flag =
1486 mdm->flags & 0x01;
1487
1488 udf_debug("Metadata Ident suffix=0x%x\n",
1489 (le16_to_cpu(
1490 ((__le16 *)
1491 mdm->partIdent.identSuffix)[0])));
1492 udf_debug("Metadata part num=%d\n",
1493 le16_to_cpu(mdm->partitionNum));
1494 udf_debug("Metadata part alloc unit size=%d\n",
1495 le32_to_cpu(mdm->allocUnitSize));
1496 udf_debug("Metadata file loc=%d\n",
1497 le32_to_cpu(mdm->metadataFileLoc));
1498 udf_debug("Mirror file loc=%d\n",
1499 le32_to_cpu(mdm->metadataMirrorFileLoc));
1500 udf_debug("Bitmap file loc=%d\n",
1501 le32_to_cpu(mdm->metadataBitmapFileLoc));
1502 udf_debug("Duplicate Flag: %d %d\n",
1503 mdata->s_dup_md_flag, mdm->flags);
cb00ea35 1504 } else {
3a71fc5d
MS		 1505 udf_debug("Unknown ident: %s\n",
1506 upm2->partIdent.ident);
1da177e4
LT		 1507 continue;
1508 }
6c79e987
MS		 1509 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1510 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1da177e4
LT		 1511 }
1512 udf_debug("Partition (%d:%d) type %d on volume %d\n",
6c79e987
MS		 1513 i, map->s_partition_num, type,
1514 map->s_volumeseqnum);
1da177e4
LT		 1515 }
1516
cb00ea35 1517 if (fileset) {
5ca4e4be 1518 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1da177e4
LT		 1519
1520 *fileset = lelb_to_cpu(la->extLocation);
3a71fc5d
MS		 1521 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1522 "partition=%d\n", fileset->logicalBlockNum,
28de7948 1523 fileset->partitionReferenceNum);
1da177e4
LT		 1524 }
1525 if (lvd->integritySeqExt.extLength)
1526 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
28de7948 1527
c0eb31ed
JK		 1528out_bh:
1529 brelse(bh);
1530 return ret;
1da177e4
LT		 1531}
1532
1533/*
1534 * udf_load_logicalvolint
1535 *
1536 */
5ca4e4be 1537static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1da177e4
LT		 1538{
1539 struct buffer_head *bh = NULL;
1540 uint16_t ident;
6c79e987
MS		 1541 struct udf_sb_info *sbi = UDF_SB(sb);
1542 struct logicalVolIntegrityDesc *lvid;
1da177e4
LT		 1543
1544 while (loc.extLength > 0 &&
cb00ea35
CG		 1545 (bh = udf_read_tagged(sb, loc.extLocation,
1546 loc.extLocation, &ident)) &&
1547 ident == TAG_IDENT_LVID) {
6c79e987
MS		 1548 sbi->s_lvid_bh = bh;
1549 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
cb00ea35 1550
6c79e987 1551 if (lvid->nextIntegrityExt.extLength)
3a71fc5d 1552 udf_load_logicalvolint(sb,
6c79e987 1553 leea_to_cpu(lvid->nextIntegrityExt));
cb00ea35 1554
6c79e987 1555 if (sbi->s_lvid_bh != bh)
3bf25cb4 1556 brelse(bh);
1da177e4 1557 loc.extLength -= sb->s_blocksize;
cb00ea35 1558 loc.extLocation++;
1da177e4 1559 }
6c79e987 1560 if (sbi->s_lvid_bh != bh)
3bf25cb4 1561 brelse(bh);
1da177e4
LT		 1562}
1563
1564/*
1565 * udf_process_sequence
1566 *
1567 * PURPOSE
1568 * Process a main/reserve volume descriptor sequence.
1569 *
1570 * PRE-CONDITIONS
1571 * sb Pointer to _locked_ superblock.
1572 * block First block of first extent of the sequence.
1573 * lastblock Lastblock of first extent of the sequence.
1574 *
1575 * HISTORY
1576 * July 1, 1997 - Andrew E. Mileski
1577 * Written, tested, and released.
1578 */
200a3592 1579static noinline int udf_process_sequence(struct super_block *sb, long block,
5ca4e4be 1580 long lastblock, struct kernel_lb_addr *fileset)
1da177e4
LT		 1581{
1582 struct buffer_head *bh = NULL;
1583 struct udf_vds_record vds[VDS_POS_LENGTH];
4b11111a 1584 struct udf_vds_record *curr;
1da177e4
LT		 1585 struct generic_desc *gd;
1586 struct volDescPtr *vdp;
cb00ea35 1587 int done = 0;
1da177e4
LT		 1588 uint32_t vdsn;
1589 uint16_t ident;
1590 long next_s = 0, next_e = 0;
1591
1592 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1593
c0eb31ed
JK		 1594 /*
1595 * Read the main descriptor sequence and find which descriptors
1596 * are in it.
1597 */
cb00ea35 1598 for (; (!done && block <= lastblock); block++) {
1da177e4
LT		 1599
1600 bh = udf_read_tagged(sb, block, block, &ident);
c0eb31ed
JK		 1601 if (!bh) {
1602 printk(KERN_ERR "udf: Block %Lu of volume descriptor "
1603 "sequence is corrupted or we could not read "
1604 "it.\n", (unsigned long long)block);
1605 return 1;
1606 }
1da177e4
LT		 1607
1608 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1609 gd = (struct generic_desc *)bh->b_data;
1610 vdsn = le32_to_cpu(gd->volDescSeqNum);
cb00ea35 1611 switch (ident) {
28de7948 1612 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
4b11111a
MS		 1613 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1614 if (vdsn >= curr->volDescSeqNum) {
1615 curr->volDescSeqNum = vdsn;
1616 curr->block = block;
cb00ea35
CG		 1617 }
1618 break;
28de7948 1619 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
4b11111a
MS		 1620 curr = &vds[VDS_POS_VOL_DESC_PTR];
1621 if (vdsn >= curr->volDescSeqNum) {
1622 curr->volDescSeqNum = vdsn;
1623 curr->block = block;
cb00ea35
CG		 1624
1625 vdp = (struct volDescPtr *)bh->b_data;
4b11111a
MS		 1626 next_s = le32_to_cpu(
1627 vdp->nextVolDescSeqExt.extLocation);
1628 next_e = le32_to_cpu(
1629 vdp->nextVolDescSeqExt.extLength);
cb00ea35
CG		 1630 next_e = next_e >> sb->s_blocksize_bits;
1631 next_e += next_s;
1632 }
1633 break;
28de7948 1634 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
4b11111a
MS		 1635 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1636 if (vdsn >= curr->volDescSeqNum) {
1637 curr->volDescSeqNum = vdsn;
1638 curr->block = block;
cb00ea35
CG		 1639 }
1640 break;
28de7948 1641 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
4b11111a
MS		 1642 curr = &vds[VDS_POS_PARTITION_DESC];
1643 if (!curr->block)
1644 curr->block = block;
cb00ea35 1645 break;
28de7948 1646 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
4b11111a
MS		 1647 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1648 if (vdsn >= curr->volDescSeqNum) {
1649 curr->volDescSeqNum = vdsn;
1650 curr->block = block;
cb00ea35
CG		 1651 }
1652 break;
28de7948 1653 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
4b11111a
MS		 1654 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1655 if (vdsn >= curr->volDescSeqNum) {
1656 curr->volDescSeqNum = vdsn;
1657 curr->block = block;
cb00ea35
CG		 1658 }
1659 break;
28de7948 1660 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
cb00ea35
CG		 1661 vds[VDS_POS_TERMINATING_DESC].block = block;
1662 if (next_e) {
1663 block = next_s;
1664 lastblock = next_e;
1665 next_s = next_e = 0;
4b11111a 1666 } else
cb00ea35
CG		 1667 done = 1;
1668 break;
1da177e4 1669 }
3bf25cb4 1670 brelse(bh);
1da177e4 1671 }
c0eb31ed
JK		 1672 /*
1673 * Now read interesting descriptors again and process them
1674 * in a suitable order
1675 */
1676 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1677 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n");
1678 return 1;
1679 }
1680 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1681 return 1;
165923fa 1682
c0eb31ed
JK		 1683 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1684 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1685 return 1;
165923fa 1686
c0eb31ed
JK		 1687 if (vds[VDS_POS_PARTITION_DESC].block) {
1688 /*
1689 * We rescan the whole descriptor sequence to find
1690 * partition descriptor blocks and process them.
1691 */
1692 for (block = vds[VDS_POS_PARTITION_DESC].block;
1693 block < vds[VDS_POS_TERMINATING_DESC].block;
1694 block++)
1695 if (udf_load_partdesc(sb, block))
165923fa 1696 return 1;
1da177e4
LT		 1697 }
1698
1699 return 0;
1700}
1701
1702/*
1703 * udf_check_valid()
1704 */
cb00ea35 1705static int udf_check_valid(struct super_block *sb, int novrs, int silent)
1da177e4 1706{
225feded 1707 loff_t block;
d0db181c 1708 struct udf_sb_info *sbi = UDF_SB(sb);
1da177e4 1709
cb00ea35 1710 if (novrs) {
1da177e4
LT		 1711 udf_debug("Validity check skipped because of novrs option\n");
1712 return 0;
1713 }
1714 /* Check that it is NSR02 compliant */
1715 /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
165923fa 1716 block = udf_vrs(sb, silent);
d0db181c
PE		 1717 if (block == -1)
1718 udf_debug("Failed to read byte 32768. Assuming open "
1719 "disc. Skipping validity check\n");
1720 if (block && !sbi->s_last_block)
165923fa 1721 sbi->s_last_block = udf_get_last_block(sb);
225feded 1722 return !!block;
1da177e4
LT		 1723}
1724
1197e4df
CL		 1725static int udf_check_volume(struct super_block *sb,
1726 struct udf_options *uopt, int silent)
1727{
1728 struct udf_sb_info *sbi = UDF_SB(sb);
1729
1730 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1731 if (!silent)
1732 printk(KERN_WARNING "UDF-fs: Bad block size\n");
1733 return 0;
1734 }
1735 sbi->s_last_block = uopt->lastblock;
225feded 1736 if (!udf_check_valid(sb, uopt->novrs, silent)) {
1197e4df
CL		 1737 if (!silent)
1738 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1739 return 0;
1740 }
1741 sbi->s_anchor[0] = sbi->s_anchor[1] = 0;
1742 sbi->s_anchor[2] = uopt->anchor;
1743 if (!udf_find_anchor(sb)) {
1744 if (!silent)
1745 printk(KERN_WARNING "UDF-fs: No anchor found\n");
1746 return 0;
1747 }
1748 return 1;
1749}
1750
5ca4e4be 1751static int udf_load_sequence(struct super_block *sb, struct kernel_lb_addr *fileset)
1da177e4
LT		 1752{
1753 struct anchorVolDescPtr *anchor;
1754 uint16_t ident;
1755 struct buffer_head *bh;
1756 long main_s, main_e, reserve_s, reserve_e;
38b74a53 1757 int i;
6c79e987 1758 struct udf_sb_info *sbi;
1da177e4
LT		 1759
1760 if (!sb)
1761 return 1;
6c79e987 1762 sbi = UDF_SB(sb);
1da177e4 1763
6c79e987 1764 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
28f7c4d4
MS		 1765 if (!sbi->s_anchor[i])
1766 continue;
165923fa 1767
28f7c4d4
MS		 1768 bh = udf_read_tagged(sb, sbi->s_anchor[i], sbi->s_anchor[i],
1769 &ident);
1770 if (!bh)
1771 continue;
1772
1773 anchor = (struct anchorVolDescPtr *)bh->b_data;
1774
1775 /* Locate the main sequence */
1776 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1777 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1778 main_e = main_e >> sb->s_blocksize_bits;
1779 main_e += main_s;
1780
1781 /* Locate the reserve sequence */
1782 reserve_s = le32_to_cpu(
4b11111a 1783 anchor->reserveVolDescSeqExt.extLocation);
28f7c4d4 1784 reserve_e = le32_to_cpu(
4b11111a 1785 anchor->reserveVolDescSeqExt.extLength);
28f7c4d4
MS		 1786 reserve_e = reserve_e >> sb->s_blocksize_bits;
1787 reserve_e += reserve_s;
1da177e4 1788
28f7c4d4 1789 brelse(bh);
1da177e4 1790
28f7c4d4
MS		 1791 /* Process the main & reserve sequences */
1792 /* responsible for finding the PartitionDesc(s) */
1793 if (!(udf_process_sequence(sb, main_s, main_e,
1794 fileset) &&
1795 udf_process_sequence(sb, reserve_s, reserve_e,
1796 fileset)))
1797 break;
1da177e4
LT		 1798 }
1799
6c79e987 1800 if (i == ARRAY_SIZE(sbi->s_anchor)) {
1da177e4
LT		 1801 udf_debug("No Anchor block found\n");
1802 return 1;
28f7c4d4
MS		 1803 }
1804 udf_debug("Using anchor in block %d\n", sbi->s_anchor[i]);
1da177e4 1805
1da177e4
LT		 1806 return 0;
1807}
1808
1809static void udf_open_lvid(struct super_block *sb)
1810{
6c79e987
MS		 1811 struct udf_sb_info *sbi = UDF_SB(sb);
1812 struct buffer_head *bh = sbi->s_lvid_bh;
165923fa
MS		 1813 struct logicalVolIntegrityDesc *lvid;
1814 struct logicalVolIntegrityDescImpUse *lvidiu;
1815 if (!bh)
1816 return;
1817
1818 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1819 lvidiu = udf_sb_lvidiu(sbi);
1820
1821 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1822 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1823 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1824 CURRENT_TIME);
1825 lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN;
1826
1827 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1828 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1829 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1830
1831 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1832 mark_buffer_dirty(bh);
1da177e4
LT		 1833}
1834
1835static void udf_close_lvid(struct super_block *sb)
1836{
6c79e987
MS		 1837 struct udf_sb_info *sbi = UDF_SB(sb);
1838 struct buffer_head *bh = sbi->s_lvid_bh;
1839 struct logicalVolIntegrityDesc *lvid;
165923fa 1840 struct logicalVolIntegrityDescImpUse *lvidiu;
28de7948 1841
6c79e987
MS		 1842 if (!bh)
1843 return;
1844
1845 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1846
165923fa
MS		 1847 if (lvid->integrityType != LVID_INTEGRITY_TYPE_OPEN)
1848 return;
1849
1850 lvidiu = udf_sb_lvidiu(sbi);
1851 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1852 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1853 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1854 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1855 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1856 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1857 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1858 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1859 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1860 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1861
1862 lvid->descTag.descCRC = cpu_to_le16(
5ca4e4be 1863 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
f845fced 1864 le16_to_cpu(lvid->descTag.descCRCLength)));
165923fa
MS		 1865
1866 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1867 mark_buffer_dirty(bh);
1da177e4
LT		 1868}
1869
66e1da3f
MS		 1870static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1871{
1872 int i;
1873 int nr_groups = bitmap->s_nr_groups;
4b11111a
MS		 1874 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1875 nr_groups);
66e1da3f
MS		 1876
1877 for (i = 0; i < nr_groups; i++)
1878 if (bitmap->s_block_bitmap[i])
1879 brelse(bitmap->s_block_bitmap[i]);
1880
1881 if (size <= PAGE_SIZE)
1882 kfree(bitmap);
1883 else
1884 vfree(bitmap);
1885}
1886
2e0838fd
JK		 1887static void udf_free_partition(struct udf_part_map *map)
1888{
1889 int i;
bfb257a5 1890 struct udf_meta_data *mdata;
2e0838fd
JK		 1891
1892 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1893 iput(map->s_uspace.s_table);
1894 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1895 iput(map->s_fspace.s_table);
1896 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1897 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1898 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1899 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1900 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1901 for (i = 0; i < 4; i++)
1902 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
bfb257a5
JK		 1903 else if (map->s_partition_type == UDF_METADATA_MAP25) {
1904 mdata = &map->s_type_specific.s_metadata;
1905 iput(mdata->s_metadata_fe);
1906 mdata->s_metadata_fe = NULL;
1907
1908 iput(mdata->s_mirror_fe);
1909 mdata->s_mirror_fe = NULL;
1910
1911 iput(mdata->s_bitmap_fe);
1912 mdata->s_bitmap_fe = NULL;
1913 }
2e0838fd
JK		 1914}
1915
1da177e4
LT		 1916static int udf_fill_super(struct super_block *sb, void *options, int silent)
1917{
1918 int i;
1197e4df 1919 int found_anchor;
cb00ea35 1920 struct inode *inode = NULL;
1da177e4 1921 struct udf_options uopt;
5ca4e4be 1922 struct kernel_lb_addr rootdir, fileset;
1da177e4
LT		 1923 struct udf_sb_info *sbi;
1924
1925 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1926 uopt.uid = -1;
1927 uopt.gid = -1;
1928 uopt.umask = 0;
87bc730c
MS		 1929 uopt.fmode = UDF_INVALID_MODE;
1930 uopt.dmode = UDF_INVALID_MODE;
1da177e4 1931
6c79e987 1932 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1da177e4
LT		 1933 if (!sbi)
1934 return -ENOMEM;
28de7948 1935
1da177e4 1936 sb->s_fs_info = sbi;
1da177e4 1937
1e7933de 1938 mutex_init(&sbi->s_alloc_mutex);
1da177e4 1939
6da80894 1940 if (!udf_parse_options((char *)options, &uopt, false))
1da177e4
LT		 1941 goto error_out;
1942
1943 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
cb00ea35 1944 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1da177e4 1945 udf_error(sb, "udf_read_super",
cb00ea35 1946 "utf8 cannot be combined with iocharset\n");
1da177e4
LT		 1947 goto error_out;
1948 }
1949#ifdef CONFIG_UDF_NLS
cb00ea35 1950 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1da177e4
LT		 1951 uopt.nls_map = load_nls_default();
1952 if (!uopt.nls_map)
1953 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1954 else
1955 udf_debug("Using default NLS map\n");
1956 }
1957#endif
1958 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1959 uopt.flags |= (1 << UDF_FLAG_UTF8);
1960
1961 fileset.logicalBlockNum = 0xFFFFFFFF;
1962 fileset.partitionReferenceNum = 0xFFFF;
1963
6c79e987
MS		 1964 sbi->s_flags = uopt.flags;
1965 sbi->s_uid = uopt.uid;
1966 sbi->s_gid = uopt.gid;
1967 sbi->s_umask = uopt.umask;
7ac9bcd5
MS		 1968 sbi->s_fmode = uopt.fmode;
1969 sbi->s_dmode = uopt.dmode;
6c79e987 1970 sbi->s_nls_map = uopt.nls_map;
1da177e4 1971
cb00ea35 1972 if (uopt.session == 0xFFFFFFFF)
6c79e987 1973 sbi->s_session = udf_get_last_session(sb);
1da177e4 1974 else
6c79e987 1975 sbi->s_session = uopt.session;
1da177e4 1976
6c79e987 1977 udf_debug("Multi-session=%d\n", sbi->s_session);
1da177e4 1978
1197e4df
CL		 1979 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
1980 found_anchor = udf_check_volume(sb, &uopt, silent);
1981 } else {
1982 uopt.blocksize = bdev_hardsect_size(sb->s_bdev);
1983 found_anchor = udf_check_volume(sb, &uopt, silent);
1984 if (!found_anchor && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1985 if (!silent)
1986 printk(KERN_NOTICE
1987 "UDF-fs: Rescanning with blocksize "
1988 "%d\n", UDF_DEFAULT_BLOCKSIZE);
1989 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
1990 found_anchor = udf_check_volume(sb, &uopt, silent);
1991 }
1da177e4 1992 }
1197e4df
CL		 1993 if (!found_anchor)
1994 goto error_out;
1da177e4
LT		 1995
1996 /* Fill in the rest of the superblock */
1997 sb->s_op = &udf_sb_ops;
221e583a 1998 sb->s_export_op = &udf_export_ops;
1da177e4
LT		 1999 sb->dq_op = NULL;
2000 sb->s_dirt = 0;
2001 sb->s_magic = UDF_SUPER_MAGIC;
2002 sb->s_time_gran = 1000;
2003
38b74a53 2004 if (udf_load_sequence(sb, &fileset)) {
3a71fc5d 2005 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
1da177e4
LT		 2006 goto error_out;
2007 }
2008
6c79e987 2009 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1da177e4 2010
6c79e987 2011 if (sbi->s_lvid_bh) {
4b11111a
MS		 2012 struct logicalVolIntegrityDescImpUse *lvidiu =
2013 udf_sb_lvidiu(sbi);
6c79e987
MS		 2014 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2015 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
4b11111a
MS		 2016 /* uint16_t maxUDFWriteRev =
2017 le16_to_cpu(lvidiu->maxUDFWriteRev); */
1da177e4 2018
cb00ea35 2019 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
4b11111a
MS		 2020 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
2021 "(max is %x)\n",
6c79e987 2022 le16_to_cpu(lvidiu->minUDFReadRev),
cb00ea35 2023 UDF_MAX_READ_VERSION);
1da177e4 2024 goto error_out;
4b11111a 2025 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
1da177e4 2026 sb->s_flags |= MS_RDONLY;
1da177e4 2027
6c79e987 2028 sbi->s_udfrev = minUDFWriteRev;
1da177e4
LT		 2029
2030 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2031 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2032 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2033 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2034 }
2035
6c79e987 2036 if (!sbi->s_partitions) {
3a71fc5d 2037 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
1da177e4
LT		 2038 goto error_out;
2039 }
2040
4b11111a
MS		 2041 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2042 UDF_PART_FLAG_READ_ONLY) {
2043 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
2044 "forcing readonly mount\n");
39b3f6d6 2045 sb->s_flags |= MS_RDONLY;
c1a26e7d 2046 }
39b3f6d6 2047
cb00ea35 2048 if (udf_find_fileset(sb, &fileset, &rootdir)) {
3a71fc5d 2049 printk(KERN_WARNING "UDF-fs: No fileset found\n");
1da177e4
LT		 2050 goto error_out;
2051 }
2052
cb00ea35 2053 if (!silent) {
5ca4e4be 2054 struct timestamp ts;
56774805 2055 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
a9ca6635 2056 udf_info("UDF: Mounting volume '%s', "
28de7948 2057 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
56774805
MS		 2058 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
2059 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1da177e4
LT		 2060 }
2061 if (!(sb->s_flags & MS_RDONLY))
2062 udf_open_lvid(sb);
2063
2064 /* Assign the root inode */
2065 /* assign inodes by physical block number */
2066 /* perhaps it's not extensible enough, but for now ... */
97e961fd 2067 inode = udf_iget(sb, &rootdir);
cb00ea35 2068 if (!inode) {
4b11111a
MS		 2069 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
2070 "partition=%d\n",
cb00ea35 2071 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
1da177e4
LT		 2072 goto error_out;
2073 }
2074
2075 /* Allocate a dentry for the root inode */
2076 sb->s_root = d_alloc_root(inode);
cb00ea35 2077 if (!sb->s_root) {
3a71fc5d 2078 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
1da177e4
LT		 2079 iput(inode);
2080 goto error_out;
2081 }
31170b6a 2082 sb->s_maxbytes = MAX_LFS_FILESIZE;
1da177e4
LT		 2083 return 0;
2084
28de7948 2085error_out:
6c79e987
MS		 2086 if (sbi->s_vat_inode)
2087 iput(sbi->s_vat_inode);
2e0838fd
JK		 2088 if (sbi->s_partitions)
2089 for (i = 0; i < sbi->s_partitions; i++)
2090 udf_free_partition(&sbi->s_partmaps[i]);
1da177e4
LT		 2091#ifdef CONFIG_UDF_NLS
2092 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2093 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2094#endif
2095 if (!(sb->s_flags & MS_RDONLY))
2096 udf_close_lvid(sb);
6c79e987
MS		 2097 brelse(sbi->s_lvid_bh);
2098
2099 kfree(sbi->s_partmaps);
1da177e4
LT		 2100 kfree(sbi);
2101 sb->s_fs_info = NULL;
28de7948 2102
1da177e4
LT		 2103 return -EINVAL;
2104}
2105
b8145a76
AB		 2106static void udf_error(struct super_block *sb, const char *function,
2107 const char *fmt, ...)
1da177e4
LT		 2108{
2109 va_list args;
2110
cb00ea35 2111 if (!(sb->s_flags & MS_RDONLY)) {
1da177e4
LT		 2112 /* mark sb error */
2113 sb->s_dirt = 1;
2114 }
2115 va_start(args, fmt);
4a6e617a 2116 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1da177e4 2117 va_end(args);
3a71fc5d 2118 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
28de7948 2119 sb->s_id, function, error_buf);
1da177e4
LT		 2120}
2121
2122void udf_warning(struct super_block *sb, const char *function,
cb00ea35 2123 const char *fmt, ...)
1da177e4
LT		 2124{
2125 va_list args;
2126
cb00ea35 2127 va_start(args, fmt);
4a6e617a 2128 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1da177e4
LT		 2129 va_end(args);
2130 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
cb00ea35 2131 sb->s_id, function, error_buf);
1da177e4
LT		 2132}
2133
cb00ea35 2134static void udf_put_super(struct super_block *sb)
1da177e4
LT		 2135{
2136 int i;
6c79e987 2137 struct udf_sb_info *sbi;
1da177e4 2138
6c79e987
MS		 2139 sbi = UDF_SB(sb);
2140 if (sbi->s_vat_inode)
2141 iput(sbi->s_vat_inode);
2e0838fd
JK		 2142 if (sbi->s_partitions)
2143 for (i = 0; i < sbi->s_partitions; i++)
2144 udf_free_partition(&sbi->s_partmaps[i]);
1da177e4
LT		 2145#ifdef CONFIG_UDF_NLS
2146 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 2147 unload_nls(sbi->s_nls_map);
1da177e4
LT		 2148#endif
2149 if (!(sb->s_flags & MS_RDONLY))
2150 udf_close_lvid(sb);
6c79e987
MS		 2151 brelse(sbi->s_lvid_bh);
2152 kfree(sbi->s_partmaps);
1da177e4
LT		 2153 kfree(sb->s_fs_info);
2154 sb->s_fs_info = NULL;
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
2198 lock_kernel();
2199
2200 loc.logicalBlockNum = bitmap->s_extPosition;
6c79e987 2201 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
97e961fd 2202 bh = udf_read_ptagged(sb, &loc, 0, &ident);
1da177e4 2203
cb00ea35 2204 if (!bh) {
1da177e4
LT		 2205 printk(KERN_ERR "udf: udf_count_free failed\n");
2206 goto out;
cb00ea35 2207 } else if (ident != TAG_IDENT_SBD) {
3bf25cb4 2208 brelse(bh);
1da177e4
LT		 2209 printk(KERN_ERR "udf: udf_count_free failed\n");
2210 goto out;
2211 }
2212
2213 bm = (struct spaceBitmapDesc *)bh->b_data;
2214 bytes = le32_to_cpu(bm->numOfBytes);
28de7948
CG		 2215 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2216 ptr = (uint8_t *)bh->b_data;
1da177e4 2217
cb00ea35 2218 while (bytes > 0) {
01b954a3
MS		 2219 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2220 accum += bitmap_weight((const unsigned long *)(ptr + index),
2221 cur_bytes * 8);
2222 bytes -= cur_bytes;
cb00ea35 2223 if (bytes) {
3bf25cb4 2224 brelse(bh);
97e961fd 2225 newblock = udf_get_lb_pblock(sb, &loc, ++block);
1da177e4 2226 bh = udf_tread(sb, newblock);
cb00ea35 2227 if (!bh) {
1da177e4
LT		 2228 udf_debug("read failed\n");
2229 goto out;
2230 }
2231 index = 0;
28de7948 2232 ptr = (uint8_t *)bh->b_data;
1da177e4
LT		 2233 }
2234 }
3bf25cb4 2235 brelse(bh);
1da177e4 2236
28de7948 2237out:
1da177e4
LT		 2238 unlock_kernel();
2239
2240 return accum;
2241}
2242
4b11111a
MS		 2243static unsigned int udf_count_free_table(struct super_block *sb,
2244 struct inode *table)
1da177e4
LT		 2245{
2246 unsigned int accum = 0;
ff116fc8 2247 uint32_t elen;
5ca4e4be 2248 struct kernel_lb_addr eloc;
1da177e4 2249 int8_t etype;
ff116fc8 2250 struct extent_position epos;
1da177e4
LT		 2251
2252 lock_kernel();
2253
c0b34438 2254 epos.block = UDF_I(table)->i_location;
ff116fc8
JK		 2255 epos.offset = sizeof(struct unallocSpaceEntry);
2256 epos.bh = NULL;
1da177e4 2257
3a71fc5d 2258 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
1da177e4 2259 accum += (elen >> table->i_sb->s_blocksize_bits);
3a71fc5d 2260
3bf25cb4 2261 brelse(epos.bh);
1da177e4
LT		 2262
2263 unlock_kernel();
2264
2265 return accum;
2266}
cb00ea35
CG		 2267
2268static unsigned int udf_count_free(struct super_block *sb)
1da177e4
LT		 2269{
2270 unsigned int accum = 0;
6c79e987
MS		 2271 struct udf_sb_info *sbi;
2272 struct udf_part_map *map;
1da177e4 2273
6c79e987
MS		 2274 sbi = UDF_SB(sb);
2275 if (sbi->s_lvid_bh) {
4b11111a
MS		 2276 struct logicalVolIntegrityDesc *lvid =
2277 (struct logicalVolIntegrityDesc *)
2278 sbi->s_lvid_bh->b_data;
6c79e987 2279 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
4b11111a
MS		 2280 accum = le32_to_cpu(
2281 lvid->freeSpaceTable[sbi->s_partition]);
1da177e4
LT		 2282 if (accum == 0xFFFFFFFF)
2283 accum = 0;
2284 }
2285 }
2286
2287 if (accum)
2288 return accum;
2289
6c79e987
MS		 2290 map = &sbi->s_partmaps[sbi->s_partition];
2291 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
28de7948 2292 accum += udf_count_free_bitmap(sb,
6c79e987 2293 map->s_uspace.s_bitmap);
1da177e4 2294 }
6c79e987 2295 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
28de7948 2296 accum += udf_count_free_bitmap(sb,
6c79e987 2297 map->s_fspace.s_bitmap);
1da177e4
LT		 2298 }
2299 if (accum)
2300 return accum;
2301
6c79e987 2302 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
28de7948 2303 accum += udf_count_free_table(sb,
6c79e987 2304 map->s_uspace.s_table);
1da177e4 2305 }
6c79e987 2306 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
28de7948 2307 accum += udf_count_free_table(sb,
6c79e987 2308 map->s_fspace.s_table);
1da177e4
LT		 2309 }
2310
2311 return accum;
2312}
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