5 * Super block routines for the OSTA-UDF(tm) filesystem.
8 * OSTA-UDF(tm) = Optical Storage Technology Association
9 * Universal Disk Format.
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/
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.
23 * (C) 1998 Dave Boynton
24 * (C) 1998-2004 Ben Fennema
25 * (C) 2000 Stelias Computing Inc
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
36 * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced
37 * vol descs. rewrote option handling based on isofs
38 * 12/20/98 find the free space bitmap (if it exists)
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/buffer_head.h>
52 #include <linux/vfs.h>
53 #include <linux/vmalloc.h>
54 #include <linux/errno.h>
55 #include <linux/mount.h>
56 #include <linux/seq_file.h>
57 #include <linux/bitmap.h>
58 #include <linux/crc-itu-t.h>
59 #include <linux/log2.h>
60 #include <asm/byteorder.h>
65 #include <linux/init.h>
66 #include <linux/uaccess.h>
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
77 #define UDF_DEFAULT_BLOCKSIZE 2048
79 #define VSD_FIRST_SECTOR_OFFSET 32768
80 #define VSD_MAX_SECTOR_OFFSET 0x800000
82 enum { UDF_MAX_LINKS = 0xffff };
84 /* These are the "meat" - everything else is stuffing */
85 static int udf_fill_super(struct super_block *, void *, int);
86 static void udf_put_super(struct super_block *);
87 static int udf_sync_fs(struct super_block *, int);
88 static int udf_remount_fs(struct super_block *, int *, char *);
89 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
90 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
91 struct kernel_lb_addr *);
92 static void udf_load_fileset(struct super_block *, struct buffer_head *,
93 struct kernel_lb_addr *);
94 static void udf_open_lvid(struct super_block *);
95 static void udf_close_lvid(struct super_block *);
96 static unsigned int udf_count_free(struct super_block *);
97 static int udf_statfs(struct dentry *, struct kstatfs *);
98 static int udf_show_options(struct seq_file *, struct dentry *);
100 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
102 struct logicalVolIntegrityDesc *lvid;
103 unsigned int partnum;
106 if (!UDF_SB(sb)->s_lvid_bh)
108 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
109 partnum = le32_to_cpu(lvid->numOfPartitions);
110 if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
111 offsetof(struct logicalVolIntegrityDesc, impUse)) /
112 (2 * sizeof(uint32_t)) < partnum) {
113 udf_err(sb, "Logical volume integrity descriptor corrupted "
114 "(numOfPartitions = %u)!\n", partnum);
117 /* The offset is to skip freeSpaceTable and sizeTable arrays */
118 offset = partnum * 2 * sizeof(uint32_t);
119 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
122 /* UDF filesystem type */
123 static struct dentry *udf_mount(struct file_system_type *fs_type,
124 int flags, const char *dev_name, void *data)
126 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
129 static struct file_system_type udf_fstype = {
130 .owner = THIS_MODULE,
133 .kill_sb = kill_block_super,
134 .fs_flags = FS_REQUIRES_DEV,
136 MODULE_ALIAS_FS("udf");
138 static struct kmem_cache *udf_inode_cachep;
140 static struct inode *udf_alloc_inode(struct super_block *sb)
142 struct udf_inode_info *ei;
143 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
148 ei->i_lenExtents = 0;
149 ei->i_next_alloc_block = 0;
150 ei->i_next_alloc_goal = 0;
152 init_rwsem(&ei->i_data_sem);
153 ei->cached_extent.lstart = -1;
154 spin_lock_init(&ei->i_extent_cache_lock);
156 return &ei->vfs_inode;
159 static void udf_i_callback(struct rcu_head *head)
161 struct inode *inode = container_of(head, struct inode, i_rcu);
162 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
165 static void udf_destroy_inode(struct inode *inode)
167 call_rcu(&inode->i_rcu, udf_i_callback);
170 static void init_once(void *foo)
172 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
174 ei->i_ext.i_data = NULL;
175 inode_init_once(&ei->vfs_inode);
178 static int __init init_inodecache(void)
180 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
181 sizeof(struct udf_inode_info),
182 0, (SLAB_RECLAIM_ACCOUNT |
185 if (!udf_inode_cachep)
190 static void destroy_inodecache(void)
193 * Make sure all delayed rcu free inodes are flushed before we
197 kmem_cache_destroy(udf_inode_cachep);
200 /* Superblock operations */
201 static const struct super_operations udf_sb_ops = {
202 .alloc_inode = udf_alloc_inode,
203 .destroy_inode = udf_destroy_inode,
204 .write_inode = udf_write_inode,
205 .evict_inode = udf_evict_inode,
206 .put_super = udf_put_super,
207 .sync_fs = udf_sync_fs,
208 .statfs = udf_statfs,
209 .remount_fs = udf_remount_fs,
210 .show_options = udf_show_options,
215 unsigned int blocksize;
216 unsigned int session;
217 unsigned int lastblock;
220 unsigned short partition;
221 unsigned int fileset;
222 unsigned int rootdir;
229 struct nls_table *nls_map;
232 static int __init init_udf_fs(void)
236 err = init_inodecache();
239 err = register_filesystem(&udf_fstype);
246 destroy_inodecache();
252 static void __exit exit_udf_fs(void)
254 unregister_filesystem(&udf_fstype);
255 destroy_inodecache();
258 module_init(init_udf_fs)
259 module_exit(exit_udf_fs)
261 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
263 struct udf_sb_info *sbi = UDF_SB(sb);
265 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
267 if (!sbi->s_partmaps) {
268 udf_err(sb, "Unable to allocate space for %d partition maps\n",
270 sbi->s_partitions = 0;
274 sbi->s_partitions = count;
278 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
281 int nr_groups = bitmap->s_nr_groups;
282 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
285 for (i = 0; i < nr_groups; i++)
286 if (bitmap->s_block_bitmap[i])
287 brelse(bitmap->s_block_bitmap[i]);
289 if (size <= PAGE_SIZE)
295 static void udf_free_partition(struct udf_part_map *map)
298 struct udf_meta_data *mdata;
300 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
301 iput(map->s_uspace.s_table);
302 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
303 iput(map->s_fspace.s_table);
304 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
305 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
306 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
307 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
308 if (map->s_partition_type == UDF_SPARABLE_MAP15)
309 for (i = 0; i < 4; i++)
310 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
311 else if (map->s_partition_type == UDF_METADATA_MAP25) {
312 mdata = &map->s_type_specific.s_metadata;
313 iput(mdata->s_metadata_fe);
314 mdata->s_metadata_fe = NULL;
316 iput(mdata->s_mirror_fe);
317 mdata->s_mirror_fe = NULL;
319 iput(mdata->s_bitmap_fe);
320 mdata->s_bitmap_fe = NULL;
324 static void udf_sb_free_partitions(struct super_block *sb)
326 struct udf_sb_info *sbi = UDF_SB(sb);
328 if (sbi->s_partmaps == NULL)
330 for (i = 0; i < sbi->s_partitions; i++)
331 udf_free_partition(&sbi->s_partmaps[i]);
332 kfree(sbi->s_partmaps);
333 sbi->s_partmaps = NULL;
336 static int udf_show_options(struct seq_file *seq, struct dentry *root)
338 struct super_block *sb = root->d_sb;
339 struct udf_sb_info *sbi = UDF_SB(sb);
341 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
342 seq_puts(seq, ",nostrict");
343 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
344 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
345 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
346 seq_puts(seq, ",unhide");
347 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
348 seq_puts(seq, ",undelete");
349 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
350 seq_puts(seq, ",noadinicb");
351 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
352 seq_puts(seq, ",shortad");
353 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
354 seq_puts(seq, ",uid=forget");
355 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
356 seq_puts(seq, ",uid=ignore");
357 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
358 seq_puts(seq, ",gid=forget");
359 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
360 seq_puts(seq, ",gid=ignore");
361 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
362 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
363 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
364 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
365 if (sbi->s_umask != 0)
366 seq_printf(seq, ",umask=%ho", sbi->s_umask);
367 if (sbi->s_fmode != UDF_INVALID_MODE)
368 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
369 if (sbi->s_dmode != UDF_INVALID_MODE)
370 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
371 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
372 seq_printf(seq, ",session=%u", sbi->s_session);
373 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
374 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
375 if (sbi->s_anchor != 0)
376 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
378 * volume, partition, fileset and rootdir seem to be ignored
381 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
382 seq_puts(seq, ",utf8");
383 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
384 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
393 * Parse mount options.
396 * The following mount options are supported:
398 * gid= Set the default group.
399 * umask= Set the default umask.
400 * mode= Set the default file permissions.
401 * dmode= Set the default directory permissions.
402 * uid= Set the default user.
403 * bs= Set the block size.
404 * unhide Show otherwise hidden files.
405 * undelete Show deleted files in lists.
406 * adinicb Embed data in the inode (default)
407 * noadinicb Don't embed data in the inode
408 * shortad Use short ad's
409 * longad Use long ad's (default)
410 * nostrict Unset strict conformance
411 * iocharset= Set the NLS character set
413 * The remaining are for debugging and disaster recovery:
415 * novrs Skip volume sequence recognition
417 * The following expect a offset from 0.
419 * session= Set the CDROM session (default= last session)
420 * anchor= Override standard anchor location. (default= 256)
421 * volume= Override the VolumeDesc location. (unused)
422 * partition= Override the PartitionDesc location. (unused)
423 * lastblock= Set the last block of the filesystem/
425 * The following expect a offset from the partition root.
427 * fileset= Override the fileset block location. (unused)
428 * rootdir= Override the root directory location. (unused)
429 * WARNING: overriding the rootdir to a non-directory may
430 * yield highly unpredictable results.
433 * options Pointer to mount options string.
434 * uopts Pointer to mount options variable.
437 * <return> 1 Mount options parsed okay.
438 * <return> 0 Error parsing mount options.
441 * July 1, 1997 - Andrew E. Mileski
442 * Written, tested, and released.
446 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
447 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
448 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
449 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
450 Opt_rootdir, Opt_utf8, Opt_iocharset,
451 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
455 static const match_table_t tokens = {
456 {Opt_novrs, "novrs"},
457 {Opt_nostrict, "nostrict"},
459 {Opt_unhide, "unhide"},
460 {Opt_undelete, "undelete"},
461 {Opt_noadinicb, "noadinicb"},
462 {Opt_adinicb, "adinicb"},
463 {Opt_shortad, "shortad"},
464 {Opt_longad, "longad"},
465 {Opt_uforget, "uid=forget"},
466 {Opt_uignore, "uid=ignore"},
467 {Opt_gforget, "gid=forget"},
468 {Opt_gignore, "gid=ignore"},
471 {Opt_umask, "umask=%o"},
472 {Opt_session, "session=%u"},
473 {Opt_lastblock, "lastblock=%u"},
474 {Opt_anchor, "anchor=%u"},
475 {Opt_volume, "volume=%u"},
476 {Opt_partition, "partition=%u"},
477 {Opt_fileset, "fileset=%u"},
478 {Opt_rootdir, "rootdir=%u"},
480 {Opt_iocharset, "iocharset=%s"},
481 {Opt_fmode, "mode=%o"},
482 {Opt_dmode, "dmode=%o"},
486 static int udf_parse_options(char *options, struct udf_options *uopt,
493 uopt->partition = 0xFFFF;
494 uopt->session = 0xFFFFFFFF;
497 uopt->volume = 0xFFFFFFFF;
498 uopt->rootdir = 0xFFFFFFFF;
499 uopt->fileset = 0xFFFFFFFF;
500 uopt->nls_map = NULL;
505 while ((p = strsep(&options, ",")) != NULL) {
506 substring_t args[MAX_OPT_ARGS];
512 token = match_token(p, tokens, args);
518 if (match_int(&args[0], &option))
521 if (n != 512 && n != 1024 && n != 2048 && n != 4096)
524 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
527 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
530 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
533 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
536 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
539 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
542 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
545 if (match_int(args, &option))
547 uopt->gid = make_kgid(current_user_ns(), option);
548 if (!gid_valid(uopt->gid))
550 uopt->flags |= (1 << UDF_FLAG_GID_SET);
553 if (match_int(args, &option))
555 uopt->uid = make_kuid(current_user_ns(), option);
556 if (!uid_valid(uopt->uid))
558 uopt->flags |= (1 << UDF_FLAG_UID_SET);
561 if (match_octal(args, &option))
563 uopt->umask = option;
566 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
569 if (match_int(args, &option))
571 uopt->session = option;
573 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
576 if (match_int(args, &option))
578 uopt->lastblock = option;
580 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
583 if (match_int(args, &option))
585 uopt->anchor = option;
588 if (match_int(args, &option))
590 uopt->volume = option;
593 if (match_int(args, &option))
595 uopt->partition = option;
598 if (match_int(args, &option))
600 uopt->fileset = option;
603 if (match_int(args, &option))
605 uopt->rootdir = option;
608 uopt->flags |= (1 << UDF_FLAG_UTF8);
610 #ifdef CONFIG_UDF_NLS
612 uopt->nls_map = load_nls(args[0].from);
613 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
617 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
620 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
623 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
626 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
629 if (match_octal(args, &option))
631 uopt->fmode = option & 0777;
634 if (match_octal(args, &option))
636 uopt->dmode = option & 0777;
639 pr_err("bad mount option \"%s\" or missing value\n", p);
646 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
648 struct udf_options uopt;
649 struct udf_sb_info *sbi = UDF_SB(sb);
651 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
655 int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
656 if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY))
660 uopt.flags = sbi->s_flags;
661 uopt.uid = sbi->s_uid;
662 uopt.gid = sbi->s_gid;
663 uopt.umask = sbi->s_umask;
664 uopt.fmode = sbi->s_fmode;
665 uopt.dmode = sbi->s_dmode;
667 if (!udf_parse_options(options, &uopt, true))
670 write_lock(&sbi->s_cred_lock);
671 sbi->s_flags = uopt.flags;
672 sbi->s_uid = uopt.uid;
673 sbi->s_gid = uopt.gid;
674 sbi->s_umask = uopt.umask;
675 sbi->s_fmode = uopt.fmode;
676 sbi->s_dmode = uopt.dmode;
677 write_unlock(&sbi->s_cred_lock);
679 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
682 if (*flags & MS_RDONLY)
691 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
692 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
693 static loff_t udf_check_vsd(struct super_block *sb)
695 struct volStructDesc *vsd = NULL;
696 loff_t sector = VSD_FIRST_SECTOR_OFFSET;
698 struct buffer_head *bh = NULL;
701 struct udf_sb_info *sbi;
704 if (sb->s_blocksize < sizeof(struct volStructDesc))
705 sectorsize = sizeof(struct volStructDesc);
707 sectorsize = sb->s_blocksize;
709 sector += (sbi->s_session << sb->s_blocksize_bits);
711 udf_debug("Starting at sector %u (%ld byte sectors)\n",
712 (unsigned int)(sector >> sb->s_blocksize_bits),
714 /* Process the sequence (if applicable). The hard limit on the sector
715 * offset is arbitrary, hopefully large enough so that all valid UDF
716 * filesystems will be recognised. There is no mention of an upper
717 * bound to the size of the volume recognition area in the standard.
718 * The limit will prevent the code to read all the sectors of a
719 * specially crafted image (like a bluray disc full of CD001 sectors),
720 * potentially causing minutes or even hours of uninterruptible I/O
721 * activity. This actually happened with uninitialised SSD partitions
722 * (all 0xFF) before the check for the limit and all valid IDs were
724 for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET;
725 sector += sectorsize) {
727 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
731 /* Look for ISO descriptors */
732 vsd = (struct volStructDesc *)(bh->b_data +
733 (sector & (sb->s_blocksize - 1)));
735 if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
737 switch (vsd->structType) {
739 udf_debug("ISO9660 Boot Record found\n");
742 udf_debug("ISO9660 Primary Volume Descriptor found\n");
745 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
748 udf_debug("ISO9660 Volume Partition Descriptor found\n");
751 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
754 udf_debug("ISO9660 VRS (%u) found\n",
758 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
761 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
765 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
768 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
771 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2,
774 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02,
778 /* invalid id : end of volume recognition area */
789 else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) ==
790 VSD_FIRST_SECTOR_OFFSET)
796 static int udf_find_fileset(struct super_block *sb,
797 struct kernel_lb_addr *fileset,
798 struct kernel_lb_addr *root)
800 struct buffer_head *bh = NULL;
803 struct udf_sb_info *sbi;
805 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
806 fileset->partitionReferenceNum != 0xFFFF) {
807 bh = udf_read_ptagged(sb, fileset, 0, &ident);
811 } else if (ident != TAG_IDENT_FSD) {
820 /* Search backwards through the partitions */
821 struct kernel_lb_addr newfileset;
823 /* --> cvg: FIXME - is it reasonable? */
826 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
827 (newfileset.partitionReferenceNum != 0xFFFF &&
828 fileset->logicalBlockNum == 0xFFFFFFFF &&
829 fileset->partitionReferenceNum == 0xFFFF);
830 newfileset.partitionReferenceNum--) {
831 lastblock = sbi->s_partmaps
832 [newfileset.partitionReferenceNum]
834 newfileset.logicalBlockNum = 0;
837 bh = udf_read_ptagged(sb, &newfileset, 0,
840 newfileset.logicalBlockNum++;
847 struct spaceBitmapDesc *sp;
848 sp = (struct spaceBitmapDesc *)
850 newfileset.logicalBlockNum += 1 +
851 ((le32_to_cpu(sp->numOfBytes) +
852 sizeof(struct spaceBitmapDesc)
853 - 1) >> sb->s_blocksize_bits);
858 *fileset = newfileset;
861 newfileset.logicalBlockNum++;
866 } while (newfileset.logicalBlockNum < lastblock &&
867 fileset->logicalBlockNum == 0xFFFFFFFF &&
868 fileset->partitionReferenceNum == 0xFFFF);
872 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
873 fileset->partitionReferenceNum != 0xFFFF) && bh) {
874 udf_debug("Fileset at block=%d, partition=%d\n",
875 fileset->logicalBlockNum,
876 fileset->partitionReferenceNum);
878 sbi->s_partition = fileset->partitionReferenceNum;
879 udf_load_fileset(sb, bh, root);
887 * Load primary Volume Descriptor Sequence
889 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
892 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
894 struct primaryVolDesc *pvoldesc;
895 struct ustr *instr, *outstr;
896 struct buffer_head *bh;
900 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
904 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
908 bh = udf_read_tagged(sb, block, block, &ident);
914 if (ident != TAG_IDENT_PVD) {
919 pvoldesc = (struct primaryVolDesc *)bh->b_data;
921 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
922 pvoldesc->recordingDateAndTime)) {
924 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
925 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
926 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
927 ts->minute, le16_to_cpu(ts->typeAndTimezone));
931 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
932 if (udf_CS0toUTF8(outstr, instr)) {
933 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
934 outstr->u_len > 31 ? 31 : outstr->u_len);
935 udf_debug("volIdent[] = '%s'\n",
936 UDF_SB(sb)->s_volume_ident);
939 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
940 if (udf_CS0toUTF8(outstr, instr))
941 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
953 struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
954 u32 meta_file_loc, u32 partition_num)
956 struct kernel_lb_addr addr;
957 struct inode *metadata_fe;
959 addr.logicalBlockNum = meta_file_loc;
960 addr.partitionReferenceNum = partition_num;
962 metadata_fe = udf_iget(sb, &addr);
964 if (metadata_fe == NULL)
965 udf_warn(sb, "metadata inode efe not found\n");
966 else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
967 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
975 static int udf_load_metadata_files(struct super_block *sb, int partition)
977 struct udf_sb_info *sbi = UDF_SB(sb);
978 struct udf_part_map *map;
979 struct udf_meta_data *mdata;
980 struct kernel_lb_addr addr;
982 map = &sbi->s_partmaps[partition];
983 mdata = &map->s_type_specific.s_metadata;
985 /* metadata address */
986 udf_debug("Metadata file location: block = %d part = %d\n",
987 mdata->s_meta_file_loc, map->s_partition_num);
989 mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb,
990 mdata->s_meta_file_loc, map->s_partition_num);
992 if (mdata->s_metadata_fe == NULL) {
993 /* mirror file entry */
994 udf_debug("Mirror metadata file location: block = %d part = %d\n",
995 mdata->s_mirror_file_loc, map->s_partition_num);
997 mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
998 mdata->s_mirror_file_loc, map->s_partition_num);
1000 if (mdata->s_mirror_fe == NULL) {
1001 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
1009 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1011 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
1012 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
1013 addr.partitionReferenceNum = map->s_partition_num;
1015 udf_debug("Bitmap file location: block = %d part = %d\n",
1016 addr.logicalBlockNum, addr.partitionReferenceNum);
1018 mdata->s_bitmap_fe = udf_iget(sb, &addr);
1019 if (mdata->s_bitmap_fe == NULL) {
1020 if (sb->s_flags & MS_RDONLY)
1021 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
1023 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
1029 udf_debug("udf_load_metadata_files Ok\n");
1033 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
1034 struct kernel_lb_addr *root)
1036 struct fileSetDesc *fset;
1038 fset = (struct fileSetDesc *)bh->b_data;
1040 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1042 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1044 udf_debug("Rootdir at block=%d, partition=%d\n",
1045 root->logicalBlockNum, root->partitionReferenceNum);
1048 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1050 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
1051 return DIV_ROUND_UP(map->s_partition_len +
1052 (sizeof(struct spaceBitmapDesc) << 3),
1053 sb->s_blocksize * 8);
1056 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1058 struct udf_bitmap *bitmap;
1062 nr_groups = udf_compute_nr_groups(sb, index);
1063 size = sizeof(struct udf_bitmap) +
1064 (sizeof(struct buffer_head *) * nr_groups);
1066 if (size <= PAGE_SIZE)
1067 bitmap = kzalloc(size, GFP_KERNEL);
1069 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
1074 bitmap->s_nr_groups = nr_groups;
1078 static int udf_fill_partdesc_info(struct super_block *sb,
1079 struct partitionDesc *p, int p_index)
1081 struct udf_part_map *map;
1082 struct udf_sb_info *sbi = UDF_SB(sb);
1083 struct partitionHeaderDesc *phd;
1085 map = &sbi->s_partmaps[p_index];
1087 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1088 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1090 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1091 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1092 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1093 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1094 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1095 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1096 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1097 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1099 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1100 p_index, map->s_partition_type,
1101 map->s_partition_root, map->s_partition_len);
1103 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1104 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1107 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1108 if (phd->unallocSpaceTable.extLength) {
1109 struct kernel_lb_addr loc = {
1110 .logicalBlockNum = le32_to_cpu(
1111 phd->unallocSpaceTable.extPosition),
1112 .partitionReferenceNum = p_index,
1115 map->s_uspace.s_table = udf_iget(sb, &loc);
1116 if (!map->s_uspace.s_table) {
1117 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1121 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1122 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1123 p_index, map->s_uspace.s_table->i_ino);
1126 if (phd->unallocSpaceBitmap.extLength) {
1127 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1130 map->s_uspace.s_bitmap = bitmap;
1131 bitmap->s_extPosition = le32_to_cpu(
1132 phd->unallocSpaceBitmap.extPosition);
1133 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1134 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1135 p_index, bitmap->s_extPosition);
1138 if (phd->partitionIntegrityTable.extLength)
1139 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1141 if (phd->freedSpaceTable.extLength) {
1142 struct kernel_lb_addr loc = {
1143 .logicalBlockNum = le32_to_cpu(
1144 phd->freedSpaceTable.extPosition),
1145 .partitionReferenceNum = p_index,
1148 map->s_fspace.s_table = udf_iget(sb, &loc);
1149 if (!map->s_fspace.s_table) {
1150 udf_debug("cannot load freedSpaceTable (part %d)\n",
1155 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1156 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1157 p_index, map->s_fspace.s_table->i_ino);
1160 if (phd->freedSpaceBitmap.extLength) {
1161 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1164 map->s_fspace.s_bitmap = bitmap;
1165 bitmap->s_extPosition = le32_to_cpu(
1166 phd->freedSpaceBitmap.extPosition);
1167 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1168 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1169 p_index, bitmap->s_extPosition);
1174 static void udf_find_vat_block(struct super_block *sb, int p_index,
1175 int type1_index, sector_t start_block)
1177 struct udf_sb_info *sbi = UDF_SB(sb);
1178 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1180 struct kernel_lb_addr ino;
1183 * VAT file entry is in the last recorded block. Some broken disks have
1184 * it a few blocks before so try a bit harder...
1186 ino.partitionReferenceNum = type1_index;
1187 for (vat_block = start_block;
1188 vat_block >= map->s_partition_root &&
1189 vat_block >= start_block - 3 &&
1190 !sbi->s_vat_inode; vat_block--) {
1191 ino.logicalBlockNum = vat_block - map->s_partition_root;
1192 sbi->s_vat_inode = udf_iget(sb, &ino);
1196 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1198 struct udf_sb_info *sbi = UDF_SB(sb);
1199 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1200 struct buffer_head *bh = NULL;
1201 struct udf_inode_info *vati;
1203 struct virtualAllocationTable20 *vat20;
1204 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
1206 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
1207 if (!sbi->s_vat_inode &&
1208 sbi->s_last_block != blocks - 1) {
1209 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1210 (unsigned long)sbi->s_last_block,
1211 (unsigned long)blocks - 1);
1212 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
1214 if (!sbi->s_vat_inode)
1217 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1218 map->s_type_specific.s_virtual.s_start_offset = 0;
1219 map->s_type_specific.s_virtual.s_num_entries =
1220 (sbi->s_vat_inode->i_size - 36) >> 2;
1221 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1222 vati = UDF_I(sbi->s_vat_inode);
1223 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1224 pos = udf_block_map(sbi->s_vat_inode, 0);
1225 bh = sb_bread(sb, pos);
1228 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1230 vat20 = (struct virtualAllocationTable20 *)
1234 map->s_type_specific.s_virtual.s_start_offset =
1235 le16_to_cpu(vat20->lengthHeader);
1236 map->s_type_specific.s_virtual.s_num_entries =
1237 (sbi->s_vat_inode->i_size -
1238 map->s_type_specific.s_virtual.
1239 s_start_offset) >> 2;
1246 * Load partition descriptor block
1248 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1251 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1253 struct buffer_head *bh;
1254 struct partitionDesc *p;
1255 struct udf_part_map *map;
1256 struct udf_sb_info *sbi = UDF_SB(sb);
1258 uint16_t partitionNumber;
1262 bh = udf_read_tagged(sb, block, block, &ident);
1265 if (ident != TAG_IDENT_PD) {
1270 p = (struct partitionDesc *)bh->b_data;
1271 partitionNumber = le16_to_cpu(p->partitionNumber);
1273 /* First scan for TYPE1, SPARABLE and METADATA partitions */
1274 for (i = 0; i < sbi->s_partitions; i++) {
1275 map = &sbi->s_partmaps[i];
1276 udf_debug("Searching map: (%d == %d)\n",
1277 map->s_partition_num, partitionNumber);
1278 if (map->s_partition_num == partitionNumber &&
1279 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1280 map->s_partition_type == UDF_SPARABLE_MAP15))
1284 if (i >= sbi->s_partitions) {
1285 udf_debug("Partition (%d) not found in partition map\n",
1291 ret = udf_fill_partdesc_info(sb, p, i);
1296 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1297 * PHYSICAL partitions are already set up
1301 map = NULL; /* supress 'maybe used uninitialized' warning */
1303 for (i = 0; i < sbi->s_partitions; i++) {
1304 map = &sbi->s_partmaps[i];
1306 if (map->s_partition_num == partitionNumber &&
1307 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1308 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1309 map->s_partition_type == UDF_METADATA_MAP25))
1313 if (i >= sbi->s_partitions) {
1318 ret = udf_fill_partdesc_info(sb, p, i);
1322 if (map->s_partition_type == UDF_METADATA_MAP25) {
1323 ret = udf_load_metadata_files(sb, i);
1325 udf_err(sb, "error loading MetaData partition map %d\n",
1331 * If we have a partition with virtual map, we don't handle
1332 * writing to it (we overwrite blocks instead of relocating
1335 if (!(sb->s_flags & MS_RDONLY)) {
1339 ret = udf_load_vat(sb, i, type1_idx);
1345 /* In case loading failed, we handle cleanup in udf_fill_super */
1350 static int udf_load_sparable_map(struct super_block *sb,
1351 struct udf_part_map *map,
1352 struct sparablePartitionMap *spm)
1356 struct sparingTable *st;
1357 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1359 struct buffer_head *bh;
1361 map->s_partition_type = UDF_SPARABLE_MAP15;
1362 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1363 if (!is_power_of_2(sdata->s_packet_len)) {
1364 udf_err(sb, "error loading logical volume descriptor: "
1365 "Invalid packet length %u\n",
1366 (unsigned)sdata->s_packet_len);
1369 if (spm->numSparingTables > 4) {
1370 udf_err(sb, "error loading logical volume descriptor: "
1371 "Too many sparing tables (%d)\n",
1372 (int)spm->numSparingTables);
1376 for (i = 0; i < spm->numSparingTables; i++) {
1377 loc = le32_to_cpu(spm->locSparingTable[i]);
1378 bh = udf_read_tagged(sb, loc, loc, &ident);
1382 st = (struct sparingTable *)bh->b_data;
1384 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1385 strlen(UDF_ID_SPARING)) ||
1386 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1392 sdata->s_spar_map[i] = bh;
1394 map->s_partition_func = udf_get_pblock_spar15;
1398 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1399 struct kernel_lb_addr *fileset)
1401 struct logicalVolDesc *lvd;
1404 struct udf_sb_info *sbi = UDF_SB(sb);
1405 struct genericPartitionMap *gpm;
1407 struct buffer_head *bh;
1408 unsigned int table_len;
1411 bh = udf_read_tagged(sb, block, block, &ident);
1414 BUG_ON(ident != TAG_IDENT_LVD);
1415 lvd = (struct logicalVolDesc *)bh->b_data;
1416 table_len = le32_to_cpu(lvd->mapTableLength);
1417 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
1418 udf_err(sb, "error loading logical volume descriptor: "
1419 "Partition table too long (%u > %lu)\n", table_len,
1420 sb->s_blocksize - sizeof(*lvd));
1425 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1429 for (i = 0, offset = 0;
1430 i < sbi->s_partitions && offset < table_len;
1431 i++, offset += gpm->partitionMapLength) {
1432 struct udf_part_map *map = &sbi->s_partmaps[i];
1433 gpm = (struct genericPartitionMap *)
1434 &(lvd->partitionMaps[offset]);
1435 type = gpm->partitionMapType;
1437 struct genericPartitionMap1 *gpm1 =
1438 (struct genericPartitionMap1 *)gpm;
1439 map->s_partition_type = UDF_TYPE1_MAP15;
1440 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1441 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1442 map->s_partition_func = NULL;
1443 } else if (type == 2) {
1444 struct udfPartitionMap2 *upm2 =
1445 (struct udfPartitionMap2 *)gpm;
1446 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1447 strlen(UDF_ID_VIRTUAL))) {
1449 le16_to_cpu(((__le16 *)upm2->partIdent.
1452 map->s_partition_type =
1454 map->s_partition_func =
1455 udf_get_pblock_virt15;
1457 map->s_partition_type =
1459 map->s_partition_func =
1460 udf_get_pblock_virt20;
1462 } else if (!strncmp(upm2->partIdent.ident,
1464 strlen(UDF_ID_SPARABLE))) {
1465 ret = udf_load_sparable_map(sb, map,
1466 (struct sparablePartitionMap *)gpm);
1469 } else if (!strncmp(upm2->partIdent.ident,
1471 strlen(UDF_ID_METADATA))) {
1472 struct udf_meta_data *mdata =
1473 &map->s_type_specific.s_metadata;
1474 struct metadataPartitionMap *mdm =
1475 (struct metadataPartitionMap *)
1476 &(lvd->partitionMaps[offset]);
1477 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1478 i, type, UDF_ID_METADATA);
1480 map->s_partition_type = UDF_METADATA_MAP25;
1481 map->s_partition_func = udf_get_pblock_meta25;
1483 mdata->s_meta_file_loc =
1484 le32_to_cpu(mdm->metadataFileLoc);
1485 mdata->s_mirror_file_loc =
1486 le32_to_cpu(mdm->metadataMirrorFileLoc);
1487 mdata->s_bitmap_file_loc =
1488 le32_to_cpu(mdm->metadataBitmapFileLoc);
1489 mdata->s_alloc_unit_size =
1490 le32_to_cpu(mdm->allocUnitSize);
1491 mdata->s_align_unit_size =
1492 le16_to_cpu(mdm->alignUnitSize);
1493 if (mdm->flags & 0x01)
1494 mdata->s_flags |= MF_DUPLICATE_MD;
1496 udf_debug("Metadata Ident suffix=0x%x\n",
1497 le16_to_cpu(*(__le16 *)
1498 mdm->partIdent.identSuffix));
1499 udf_debug("Metadata part num=%d\n",
1500 le16_to_cpu(mdm->partitionNum));
1501 udf_debug("Metadata part alloc unit size=%d\n",
1502 le32_to_cpu(mdm->allocUnitSize));
1503 udf_debug("Metadata file loc=%d\n",
1504 le32_to_cpu(mdm->metadataFileLoc));
1505 udf_debug("Mirror file loc=%d\n",
1506 le32_to_cpu(mdm->metadataMirrorFileLoc));
1507 udf_debug("Bitmap file loc=%d\n",
1508 le32_to_cpu(mdm->metadataBitmapFileLoc));
1509 udf_debug("Flags: %d %d\n",
1510 mdata->s_flags, mdm->flags);
1512 udf_debug("Unknown ident: %s\n",
1513 upm2->partIdent.ident);
1516 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1517 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1519 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1520 i, map->s_partition_num, type, map->s_volumeseqnum);
1524 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1526 *fileset = lelb_to_cpu(la->extLocation);
1527 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1528 fileset->logicalBlockNum,
1529 fileset->partitionReferenceNum);
1531 if (lvd->integritySeqExt.extLength)
1532 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1540 * udf_load_logicalvolint
1543 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1545 struct buffer_head *bh = NULL;
1547 struct udf_sb_info *sbi = UDF_SB(sb);
1548 struct logicalVolIntegrityDesc *lvid;
1550 while (loc.extLength > 0 &&
1551 (bh = udf_read_tagged(sb, loc.extLocation,
1552 loc.extLocation, &ident)) &&
1553 ident == TAG_IDENT_LVID) {
1554 sbi->s_lvid_bh = bh;
1555 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1557 if (lvid->nextIntegrityExt.extLength)
1558 udf_load_logicalvolint(sb,
1559 leea_to_cpu(lvid->nextIntegrityExt));
1561 if (sbi->s_lvid_bh != bh)
1563 loc.extLength -= sb->s_blocksize;
1566 if (sbi->s_lvid_bh != bh)
1571 * Process a main/reserve volume descriptor sequence.
1572 * @block First block of first extent of the sequence.
1573 * @lastblock Lastblock of first extent of the sequence.
1574 * @fileset There we store extent containing root fileset
1576 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1579 static noinline int udf_process_sequence(
1580 struct super_block *sb,
1581 sector_t block, sector_t lastblock,
1582 struct kernel_lb_addr *fileset)
1584 struct buffer_head *bh = NULL;
1585 struct udf_vds_record vds[VDS_POS_LENGTH];
1586 struct udf_vds_record *curr;
1587 struct generic_desc *gd;
1588 struct volDescPtr *vdp;
1592 long next_s = 0, next_e = 0;
1595 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1598 * Read the main descriptor sequence and find which descriptors
1601 for (; (!done && block <= lastblock); block++) {
1603 bh = udf_read_tagged(sb, block, block, &ident);
1606 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1607 (unsigned long long)block);
1611 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1612 gd = (struct generic_desc *)bh->b_data;
1613 vdsn = le32_to_cpu(gd->volDescSeqNum);
1615 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1616 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1617 if (vdsn >= curr->volDescSeqNum) {
1618 curr->volDescSeqNum = vdsn;
1619 curr->block = block;
1622 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1623 curr = &vds[VDS_POS_VOL_DESC_PTR];
1624 if (vdsn >= curr->volDescSeqNum) {
1625 curr->volDescSeqNum = vdsn;
1626 curr->block = block;
1628 vdp = (struct volDescPtr *)bh->b_data;
1629 next_s = le32_to_cpu(
1630 vdp->nextVolDescSeqExt.extLocation);
1631 next_e = le32_to_cpu(
1632 vdp->nextVolDescSeqExt.extLength);
1633 next_e = next_e >> sb->s_blocksize_bits;
1637 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1638 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1639 if (vdsn >= curr->volDescSeqNum) {
1640 curr->volDescSeqNum = vdsn;
1641 curr->block = block;
1644 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1645 curr = &vds[VDS_POS_PARTITION_DESC];
1647 curr->block = block;
1649 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1650 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1651 if (vdsn >= curr->volDescSeqNum) {
1652 curr->volDescSeqNum = vdsn;
1653 curr->block = block;
1656 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1657 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1658 if (vdsn >= curr->volDescSeqNum) {
1659 curr->volDescSeqNum = vdsn;
1660 curr->block = block;
1663 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1664 vds[VDS_POS_TERMINATING_DESC].block = block;
1668 next_s = next_e = 0;
1676 * Now read interesting descriptors again and process them
1677 * in a suitable order
1679 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1680 udf_err(sb, "Primary Volume Descriptor not found!\n");
1683 ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
1687 if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1688 ret = udf_load_logicalvol(sb,
1689 vds[VDS_POS_LOGICAL_VOL_DESC].block,
1695 if (vds[VDS_POS_PARTITION_DESC].block) {
1697 * We rescan the whole descriptor sequence to find
1698 * partition descriptor blocks and process them.
1700 for (block = vds[VDS_POS_PARTITION_DESC].block;
1701 block < vds[VDS_POS_TERMINATING_DESC].block;
1703 ret = udf_load_partdesc(sb, block);
1713 * Load Volume Descriptor Sequence described by anchor in bh
1715 * Returns <0 on error, 0 on success
1717 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1718 struct kernel_lb_addr *fileset)
1720 struct anchorVolDescPtr *anchor;
1721 sector_t main_s, main_e, reserve_s, reserve_e;
1724 anchor = (struct anchorVolDescPtr *)bh->b_data;
1726 /* Locate the main sequence */
1727 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1728 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1729 main_e = main_e >> sb->s_blocksize_bits;
1732 /* Locate the reserve sequence */
1733 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1734 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1735 reserve_e = reserve_e >> sb->s_blocksize_bits;
1736 reserve_e += reserve_s;
1738 /* Process the main & reserve sequences */
1739 /* responsible for finding the PartitionDesc(s) */
1740 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1743 udf_sb_free_partitions(sb);
1744 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1746 udf_sb_free_partitions(sb);
1747 /* No sequence was OK, return -EIO */
1755 * Check whether there is an anchor block in the given block and
1756 * load Volume Descriptor Sequence if so.
1758 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1761 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1762 struct kernel_lb_addr *fileset)
1764 struct buffer_head *bh;
1768 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1769 udf_fixed_to_variable(block) >=
1770 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1773 bh = udf_read_tagged(sb, block, block, &ident);
1776 if (ident != TAG_IDENT_AVDP) {
1780 ret = udf_load_sequence(sb, bh, fileset);
1786 * Search for an anchor volume descriptor pointer.
1788 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1791 static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1792 struct kernel_lb_addr *fileset)
1796 struct udf_sb_info *sbi = UDF_SB(sb);
1800 /* First try user provided anchor */
1801 if (sbi->s_anchor) {
1802 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1807 * according to spec, anchor is in either:
1811 * however, if the disc isn't closed, it could be 512.
1813 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1817 * The trouble is which block is the last one. Drives often misreport
1818 * this so we try various possibilities.
1820 last[last_count++] = *lastblock;
1821 if (*lastblock >= 1)
1822 last[last_count++] = *lastblock - 1;
1823 last[last_count++] = *lastblock + 1;
1824 if (*lastblock >= 2)
1825 last[last_count++] = *lastblock - 2;
1826 if (*lastblock >= 150)
1827 last[last_count++] = *lastblock - 150;
1828 if (*lastblock >= 152)
1829 last[last_count++] = *lastblock - 152;
1831 for (i = 0; i < last_count; i++) {
1832 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1833 sb->s_blocksize_bits)
1835 ret = udf_check_anchor_block(sb, last[i], fileset);
1836 if (ret != -EAGAIN) {
1838 *lastblock = last[i];
1843 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1844 if (ret != -EAGAIN) {
1846 *lastblock = last[i];
1851 /* Finally try block 512 in case media is open */
1852 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
1856 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1857 * area specified by it. The function expects sbi->s_lastblock to be the last
1858 * block on the media.
1860 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1863 static int udf_find_anchor(struct super_block *sb,
1864 struct kernel_lb_addr *fileset)
1866 struct udf_sb_info *sbi = UDF_SB(sb);
1867 sector_t lastblock = sbi->s_last_block;
1870 ret = udf_scan_anchors(sb, &lastblock, fileset);
1874 /* No anchor found? Try VARCONV conversion of block numbers */
1875 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1876 lastblock = udf_variable_to_fixed(sbi->s_last_block);
1877 /* Firstly, we try to not convert number of the last block */
1878 ret = udf_scan_anchors(sb, &lastblock, fileset);
1882 lastblock = sbi->s_last_block;
1883 /* Secondly, we try with converted number of the last block */
1884 ret = udf_scan_anchors(sb, &lastblock, fileset);
1886 /* VARCONV didn't help. Clear it. */
1887 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1891 sbi->s_last_block = lastblock;
1896 * Check Volume Structure Descriptor, find Anchor block and load Volume
1897 * Descriptor Sequence.
1899 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1900 * block was not found.
1902 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1903 int silent, struct kernel_lb_addr *fileset)
1905 struct udf_sb_info *sbi = UDF_SB(sb);
1909 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1911 udf_warn(sb, "Bad block size\n");
1914 sbi->s_last_block = uopt->lastblock;
1916 /* Check that it is NSR02 compliant */
1917 nsr_off = udf_check_vsd(sb);
1920 udf_warn(sb, "No VRS found\n");
1924 udf_debug("Failed to read sector at offset %d. "
1925 "Assuming open disc. Skipping validity "
1926 "check\n", VSD_FIRST_SECTOR_OFFSET);
1927 if (!sbi->s_last_block)
1928 sbi->s_last_block = udf_get_last_block(sb);
1930 udf_debug("Validity check skipped because of novrs option\n");
1933 /* Look for anchor block and load Volume Descriptor Sequence */
1934 sbi->s_anchor = uopt->anchor;
1935 ret = udf_find_anchor(sb, fileset);
1937 if (!silent && ret == -EAGAIN)
1938 udf_warn(sb, "No anchor found\n");
1944 static void udf_open_lvid(struct super_block *sb)
1946 struct udf_sb_info *sbi = UDF_SB(sb);
1947 struct buffer_head *bh = sbi->s_lvid_bh;
1948 struct logicalVolIntegrityDesc *lvid;
1949 struct logicalVolIntegrityDescImpUse *lvidiu;
1953 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1954 lvidiu = udf_sb_lvidiu(sb);
1958 mutex_lock(&sbi->s_alloc_mutex);
1959 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1960 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1961 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1963 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
1965 lvid->descTag.descCRC = cpu_to_le16(
1966 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1967 le16_to_cpu(lvid->descTag.descCRCLength)));
1969 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1970 mark_buffer_dirty(bh);
1971 sbi->s_lvid_dirty = 0;
1972 mutex_unlock(&sbi->s_alloc_mutex);
1973 /* Make opening of filesystem visible on the media immediately */
1974 sync_dirty_buffer(bh);
1977 static void udf_close_lvid(struct super_block *sb)
1979 struct udf_sb_info *sbi = UDF_SB(sb);
1980 struct buffer_head *bh = sbi->s_lvid_bh;
1981 struct logicalVolIntegrityDesc *lvid;
1982 struct logicalVolIntegrityDescImpUse *lvidiu;
1986 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1987 lvidiu = udf_sb_lvidiu(sb);
1991 mutex_lock(&sbi->s_alloc_mutex);
1992 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1993 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1994 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1995 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1996 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1997 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1998 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1999 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
2000 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
2001 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
2003 lvid->descTag.descCRC = cpu_to_le16(
2004 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
2005 le16_to_cpu(lvid->descTag.descCRCLength)));
2007 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
2009 * We set buffer uptodate unconditionally here to avoid spurious
2010 * warnings from mark_buffer_dirty() when previous EIO has marked
2011 * the buffer as !uptodate
2013 set_buffer_uptodate(bh);
2014 mark_buffer_dirty(bh);
2015 sbi->s_lvid_dirty = 0;
2016 mutex_unlock(&sbi->s_alloc_mutex);
2017 /* Make closing of filesystem visible on the media immediately */
2018 sync_dirty_buffer(bh);
2021 u64 lvid_get_unique_id(struct super_block *sb)
2023 struct buffer_head *bh;
2024 struct udf_sb_info *sbi = UDF_SB(sb);
2025 struct logicalVolIntegrityDesc *lvid;
2026 struct logicalVolHeaderDesc *lvhd;
2030 bh = sbi->s_lvid_bh;
2034 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2035 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2037 mutex_lock(&sbi->s_alloc_mutex);
2038 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2039 if (!(++uniqueID & 0xFFFFFFFF))
2041 lvhd->uniqueID = cpu_to_le64(uniqueID);
2042 mutex_unlock(&sbi->s_alloc_mutex);
2043 mark_buffer_dirty(bh);
2048 static int udf_fill_super(struct super_block *sb, void *options, int silent)
2051 struct inode *inode = NULL;
2052 struct udf_options uopt;
2053 struct kernel_lb_addr rootdir, fileset;
2054 struct udf_sb_info *sbi;
2056 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
2057 uopt.uid = INVALID_UID;
2058 uopt.gid = INVALID_GID;
2060 uopt.fmode = UDF_INVALID_MODE;
2061 uopt.dmode = UDF_INVALID_MODE;
2063 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
2067 sb->s_fs_info = sbi;
2069 mutex_init(&sbi->s_alloc_mutex);
2071 if (!udf_parse_options((char *)options, &uopt, false))
2074 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
2075 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
2076 udf_err(sb, "utf8 cannot be combined with iocharset\n");
2079 #ifdef CONFIG_UDF_NLS
2080 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
2081 uopt.nls_map = load_nls_default();
2083 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2085 udf_debug("Using default NLS map\n");
2088 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2089 uopt.flags |= (1 << UDF_FLAG_UTF8);
2091 fileset.logicalBlockNum = 0xFFFFFFFF;
2092 fileset.partitionReferenceNum = 0xFFFF;
2094 sbi->s_flags = uopt.flags;
2095 sbi->s_uid = uopt.uid;
2096 sbi->s_gid = uopt.gid;
2097 sbi->s_umask = uopt.umask;
2098 sbi->s_fmode = uopt.fmode;
2099 sbi->s_dmode = uopt.dmode;
2100 sbi->s_nls_map = uopt.nls_map;
2101 rwlock_init(&sbi->s_cred_lock);
2103 if (uopt.session == 0xFFFFFFFF)
2104 sbi->s_session = udf_get_last_session(sb);
2106 sbi->s_session = uopt.session;
2108 udf_debug("Multi-session=%d\n", sbi->s_session);
2110 /* Fill in the rest of the superblock */
2111 sb->s_op = &udf_sb_ops;
2112 sb->s_export_op = &udf_export_ops;
2114 sb->s_magic = UDF_SUPER_MAGIC;
2115 sb->s_time_gran = 1000;
2117 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
2118 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2120 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
2121 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2122 if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
2124 pr_notice("Rescanning with blocksize %d\n",
2125 UDF_DEFAULT_BLOCKSIZE);
2126 brelse(sbi->s_lvid_bh);
2127 sbi->s_lvid_bh = NULL;
2128 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
2129 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2133 if (ret == -EAGAIN) {
2134 udf_warn(sb, "No partition found (1)\n");
2140 udf_debug("Lastblock=%d\n", sbi->s_last_block);
2142 if (sbi->s_lvid_bh) {
2143 struct logicalVolIntegrityDescImpUse *lvidiu =
2145 uint16_t minUDFReadRev;
2146 uint16_t minUDFWriteRev;
2152 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2153 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
2154 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
2155 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
2157 UDF_MAX_READ_VERSION);
2160 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2161 !(sb->s_flags & MS_RDONLY)) {
2166 sbi->s_udfrev = minUDFWriteRev;
2168 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2169 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2170 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2171 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2174 if (!sbi->s_partitions) {
2175 udf_warn(sb, "No partition found (2)\n");
2180 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2181 UDF_PART_FLAG_READ_ONLY &&
2182 !(sb->s_flags & MS_RDONLY)) {
2187 if (udf_find_fileset(sb, &fileset, &rootdir)) {
2188 udf_warn(sb, "No fileset found\n");
2194 struct timestamp ts;
2195 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2196 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2197 sbi->s_volume_ident,
2198 le16_to_cpu(ts.year), ts.month, ts.day,
2199 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2201 if (!(sb->s_flags & MS_RDONLY))
2204 /* Assign the root inode */
2205 /* assign inodes by physical block number */
2206 /* perhaps it's not extensible enough, but for now ... */
2207 inode = udf_iget(sb, &rootdir);
2209 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
2210 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2215 /* Allocate a dentry for the root inode */
2216 sb->s_root = d_make_root(inode);
2218 udf_err(sb, "Couldn't allocate root dentry\n");
2222 sb->s_maxbytes = MAX_LFS_FILESIZE;
2223 sb->s_max_links = UDF_MAX_LINKS;
2227 if (sbi->s_vat_inode)
2228 iput(sbi->s_vat_inode);
2229 #ifdef CONFIG_UDF_NLS
2230 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2231 unload_nls(sbi->s_nls_map);
2233 if (!(sb->s_flags & MS_RDONLY))
2235 brelse(sbi->s_lvid_bh);
2236 udf_sb_free_partitions(sb);
2238 sb->s_fs_info = NULL;
2243 void _udf_err(struct super_block *sb, const char *function,
2244 const char *fmt, ...)
2246 struct va_format vaf;
2249 va_start(args, fmt);
2254 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2259 void _udf_warn(struct super_block *sb, const char *function,
2260 const char *fmt, ...)
2262 struct va_format vaf;
2265 va_start(args, fmt);
2270 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2275 static void udf_put_super(struct super_block *sb)
2277 struct udf_sb_info *sbi;
2281 if (sbi->s_vat_inode)
2282 iput(sbi->s_vat_inode);
2283 #ifdef CONFIG_UDF_NLS
2284 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2285 unload_nls(sbi->s_nls_map);
2287 if (!(sb->s_flags & MS_RDONLY))
2289 brelse(sbi->s_lvid_bh);
2290 udf_sb_free_partitions(sb);
2291 kfree(sb->s_fs_info);
2292 sb->s_fs_info = NULL;
2295 static int udf_sync_fs(struct super_block *sb, int wait)
2297 struct udf_sb_info *sbi = UDF_SB(sb);
2299 mutex_lock(&sbi->s_alloc_mutex);
2300 if (sbi->s_lvid_dirty) {
2302 * Blockdevice will be synced later so we don't have to submit
2305 mark_buffer_dirty(sbi->s_lvid_bh);
2306 sbi->s_lvid_dirty = 0;
2308 mutex_unlock(&sbi->s_alloc_mutex);
2313 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2315 struct super_block *sb = dentry->d_sb;
2316 struct udf_sb_info *sbi = UDF_SB(sb);
2317 struct logicalVolIntegrityDescImpUse *lvidiu;
2318 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2320 lvidiu = udf_sb_lvidiu(sb);
2321 buf->f_type = UDF_SUPER_MAGIC;
2322 buf->f_bsize = sb->s_blocksize;
2323 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2324 buf->f_bfree = udf_count_free(sb);
2325 buf->f_bavail = buf->f_bfree;
2326 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2327 le32_to_cpu(lvidiu->numDirs)) : 0)
2329 buf->f_ffree = buf->f_bfree;
2330 buf->f_namelen = UDF_NAME_LEN - 2;
2331 buf->f_fsid.val[0] = (u32)id;
2332 buf->f_fsid.val[1] = (u32)(id >> 32);
2337 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2338 struct udf_bitmap *bitmap)
2340 struct buffer_head *bh = NULL;
2341 unsigned int accum = 0;
2343 int block = 0, newblock;
2344 struct kernel_lb_addr loc;
2348 struct spaceBitmapDesc *bm;
2350 loc.logicalBlockNum = bitmap->s_extPosition;
2351 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2352 bh = udf_read_ptagged(sb, &loc, 0, &ident);
2355 udf_err(sb, "udf_count_free failed\n");
2357 } else if (ident != TAG_IDENT_SBD) {
2359 udf_err(sb, "udf_count_free failed\n");
2363 bm = (struct spaceBitmapDesc *)bh->b_data;
2364 bytes = le32_to_cpu(bm->numOfBytes);
2365 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2366 ptr = (uint8_t *)bh->b_data;
2369 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2370 accum += bitmap_weight((const unsigned long *)(ptr + index),
2375 newblock = udf_get_lb_pblock(sb, &loc, ++block);
2376 bh = udf_tread(sb, newblock);
2378 udf_debug("read failed\n");
2382 ptr = (uint8_t *)bh->b_data;
2390 static unsigned int udf_count_free_table(struct super_block *sb,
2391 struct inode *table)
2393 unsigned int accum = 0;
2395 struct kernel_lb_addr eloc;
2397 struct extent_position epos;
2399 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
2400 epos.block = UDF_I(table)->i_location;
2401 epos.offset = sizeof(struct unallocSpaceEntry);
2404 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2405 accum += (elen >> table->i_sb->s_blocksize_bits);
2408 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
2413 static unsigned int udf_count_free(struct super_block *sb)
2415 unsigned int accum = 0;
2416 struct udf_sb_info *sbi;
2417 struct udf_part_map *map;
2420 if (sbi->s_lvid_bh) {
2421 struct logicalVolIntegrityDesc *lvid =
2422 (struct logicalVolIntegrityDesc *)
2423 sbi->s_lvid_bh->b_data;
2424 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2425 accum = le32_to_cpu(
2426 lvid->freeSpaceTable[sbi->s_partition]);
2427 if (accum == 0xFFFFFFFF)
2435 map = &sbi->s_partmaps[sbi->s_partition];
2436 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2437 accum += udf_count_free_bitmap(sb,
2438 map->s_uspace.s_bitmap);
2440 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2441 accum += udf_count_free_bitmap(sb,
2442 map->s_fspace.s_bitmap);
2447 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2448 accum += udf_count_free_table(sb,
2449 map->s_uspace.s_table);
2451 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2452 accum += udf_count_free_table(sb,
2453 map->s_fspace.s_table);