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/vfs.h>
52 #include <linux/vmalloc.h>
53 #include <linux/errno.h>
54 #include <linux/mount.h>
55 #include <linux/seq_file.h>
56 #include <linux/bitmap.h>
57 #include <linux/crc-itu-t.h>
58 #include <linux/log2.h>
59 #include <asm/byteorder.h>
64 #include <linux/init.h>
65 #include <linux/uaccess.h>
67 #define VDS_POS_PRIMARY_VOL_DESC 0
68 #define VDS_POS_UNALLOC_SPACE_DESC 1
69 #define VDS_POS_LOGICAL_VOL_DESC 2
70 #define VDS_POS_PARTITION_DESC 3
71 #define VDS_POS_IMP_USE_VOL_DESC 4
72 #define VDS_POS_VOL_DESC_PTR 5
73 #define VDS_POS_TERMINATING_DESC 6
74 #define VDS_POS_LENGTH 7
76 #define VSD_FIRST_SECTOR_OFFSET 32768
77 #define VSD_MAX_SECTOR_OFFSET 0x800000
80 * Maximum number of Terminating Descriptor / Logical Volume Integrity
81 * Descriptor redirections. The chosen numbers are arbitrary - just that we
82 * hopefully don't limit any real use of rewritten inode on write-once media
83 * but avoid looping for too long on corrupted media.
85 #define UDF_MAX_TD_NESTING 64
86 #define UDF_MAX_LVID_NESTING 1000
88 enum { UDF_MAX_LINKS = 0xffff };
90 /* These are the "meat" - everything else is stuffing */
91 static int udf_fill_super(struct super_block *, void *, int);
92 static void udf_put_super(struct super_block *);
93 static int udf_sync_fs(struct super_block *, int);
94 static int udf_remount_fs(struct super_block *, int *, char *);
95 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
96 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
97 struct kernel_lb_addr *);
98 static void udf_load_fileset(struct super_block *, struct buffer_head *,
99 struct kernel_lb_addr *);
100 static void udf_open_lvid(struct super_block *);
101 static void udf_close_lvid(struct super_block *);
102 static unsigned int udf_count_free(struct super_block *);
103 static int udf_statfs(struct dentry *, struct kstatfs *);
104 static int udf_show_options(struct seq_file *, struct dentry *);
106 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
108 struct logicalVolIntegrityDesc *lvid;
109 unsigned int partnum;
112 if (!UDF_SB(sb)->s_lvid_bh)
114 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
115 partnum = le32_to_cpu(lvid->numOfPartitions);
116 if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
117 offsetof(struct logicalVolIntegrityDesc, impUse)) /
118 (2 * sizeof(uint32_t)) < partnum) {
119 udf_err(sb, "Logical volume integrity descriptor corrupted "
120 "(numOfPartitions = %u)!\n", partnum);
123 /* The offset is to skip freeSpaceTable and sizeTable arrays */
124 offset = partnum * 2 * sizeof(uint32_t);
125 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
128 /* UDF filesystem type */
129 static struct dentry *udf_mount(struct file_system_type *fs_type,
130 int flags, const char *dev_name, void *data)
132 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
135 static struct file_system_type udf_fstype = {
136 .owner = THIS_MODULE,
139 .kill_sb = kill_block_super,
140 .fs_flags = FS_REQUIRES_DEV,
142 MODULE_ALIAS_FS("udf");
144 static struct kmem_cache *udf_inode_cachep;
146 static struct inode *udf_alloc_inode(struct super_block *sb)
148 struct udf_inode_info *ei;
149 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
154 ei->i_lenExtents = 0;
155 ei->i_next_alloc_block = 0;
156 ei->i_next_alloc_goal = 0;
158 init_rwsem(&ei->i_data_sem);
159 ei->cached_extent.lstart = -1;
160 spin_lock_init(&ei->i_extent_cache_lock);
162 return &ei->vfs_inode;
165 static void udf_i_callback(struct rcu_head *head)
167 struct inode *inode = container_of(head, struct inode, i_rcu);
168 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
171 static void udf_destroy_inode(struct inode *inode)
173 call_rcu(&inode->i_rcu, udf_i_callback);
176 static void init_once(void *foo)
178 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
180 ei->i_ext.i_data = NULL;
181 inode_init_once(&ei->vfs_inode);
184 static int __init init_inodecache(void)
186 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
187 sizeof(struct udf_inode_info),
188 0, (SLAB_RECLAIM_ACCOUNT |
192 if (!udf_inode_cachep)
197 static void destroy_inodecache(void)
200 * Make sure all delayed rcu free inodes are flushed before we
204 kmem_cache_destroy(udf_inode_cachep);
207 /* Superblock operations */
208 static const struct super_operations udf_sb_ops = {
209 .alloc_inode = udf_alloc_inode,
210 .destroy_inode = udf_destroy_inode,
211 .write_inode = udf_write_inode,
212 .evict_inode = udf_evict_inode,
213 .put_super = udf_put_super,
214 .sync_fs = udf_sync_fs,
215 .statfs = udf_statfs,
216 .remount_fs = udf_remount_fs,
217 .show_options = udf_show_options,
222 unsigned int blocksize;
223 unsigned int session;
224 unsigned int lastblock;
227 unsigned short partition;
228 unsigned int fileset;
229 unsigned int rootdir;
236 struct nls_table *nls_map;
239 static int __init init_udf_fs(void)
243 err = init_inodecache();
246 err = register_filesystem(&udf_fstype);
253 destroy_inodecache();
259 static void __exit exit_udf_fs(void)
261 unregister_filesystem(&udf_fstype);
262 destroy_inodecache();
265 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
267 struct udf_sb_info *sbi = UDF_SB(sb);
269 sbi->s_partmaps = kcalloc(count, sizeof(*sbi->s_partmaps), GFP_KERNEL);
270 if (!sbi->s_partmaps) {
271 sbi->s_partitions = 0;
275 sbi->s_partitions = count;
279 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
282 int nr_groups = bitmap->s_nr_groups;
284 for (i = 0; i < nr_groups; i++)
285 if (bitmap->s_block_bitmap[i])
286 brelse(bitmap->s_block_bitmap[i]);
291 static void udf_free_partition(struct udf_part_map *map)
294 struct udf_meta_data *mdata;
296 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
297 iput(map->s_uspace.s_table);
298 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
299 iput(map->s_fspace.s_table);
300 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
301 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
302 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
303 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
304 if (map->s_partition_type == UDF_SPARABLE_MAP15)
305 for (i = 0; i < 4; i++)
306 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
307 else if (map->s_partition_type == UDF_METADATA_MAP25) {
308 mdata = &map->s_type_specific.s_metadata;
309 iput(mdata->s_metadata_fe);
310 mdata->s_metadata_fe = NULL;
312 iput(mdata->s_mirror_fe);
313 mdata->s_mirror_fe = NULL;
315 iput(mdata->s_bitmap_fe);
316 mdata->s_bitmap_fe = NULL;
320 static void udf_sb_free_partitions(struct super_block *sb)
322 struct udf_sb_info *sbi = UDF_SB(sb);
325 if (!sbi->s_partmaps)
327 for (i = 0; i < sbi->s_partitions; i++)
328 udf_free_partition(&sbi->s_partmaps[i]);
329 kfree(sbi->s_partmaps);
330 sbi->s_partmaps = NULL;
333 static int udf_show_options(struct seq_file *seq, struct dentry *root)
335 struct super_block *sb = root->d_sb;
336 struct udf_sb_info *sbi = UDF_SB(sb);
338 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
339 seq_puts(seq, ",nostrict");
340 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
341 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
342 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
343 seq_puts(seq, ",unhide");
344 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
345 seq_puts(seq, ",undelete");
346 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
347 seq_puts(seq, ",noadinicb");
348 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
349 seq_puts(seq, ",shortad");
350 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
351 seq_puts(seq, ",uid=forget");
352 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
353 seq_puts(seq, ",uid=ignore");
354 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
355 seq_puts(seq, ",gid=forget");
356 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
357 seq_puts(seq, ",gid=ignore");
358 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
359 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
360 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
361 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
362 if (sbi->s_umask != 0)
363 seq_printf(seq, ",umask=%ho", sbi->s_umask);
364 if (sbi->s_fmode != UDF_INVALID_MODE)
365 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
366 if (sbi->s_dmode != UDF_INVALID_MODE)
367 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
368 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
369 seq_printf(seq, ",session=%d", sbi->s_session);
370 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
371 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
372 if (sbi->s_anchor != 0)
373 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
375 * volume, partition, fileset and rootdir seem to be ignored
378 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
379 seq_puts(seq, ",utf8");
380 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
381 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
390 * Parse mount options.
393 * The following mount options are supported:
395 * gid= Set the default group.
396 * umask= Set the default umask.
397 * mode= Set the default file permissions.
398 * dmode= Set the default directory permissions.
399 * uid= Set the default user.
400 * bs= Set the block size.
401 * unhide Show otherwise hidden files.
402 * undelete Show deleted files in lists.
403 * adinicb Embed data in the inode (default)
404 * noadinicb Don't embed data in the inode
405 * shortad Use short ad's
406 * longad Use long ad's (default)
407 * nostrict Unset strict conformance
408 * iocharset= Set the NLS character set
410 * The remaining are for debugging and disaster recovery:
412 * novrs Skip volume sequence recognition
414 * The following expect a offset from 0.
416 * session= Set the CDROM session (default= last session)
417 * anchor= Override standard anchor location. (default= 256)
418 * volume= Override the VolumeDesc location. (unused)
419 * partition= Override the PartitionDesc location. (unused)
420 * lastblock= Set the last block of the filesystem/
422 * The following expect a offset from the partition root.
424 * fileset= Override the fileset block location. (unused)
425 * rootdir= Override the root directory location. (unused)
426 * WARNING: overriding the rootdir to a non-directory may
427 * yield highly unpredictable results.
430 * options Pointer to mount options string.
431 * uopts Pointer to mount options variable.
434 * <return> 1 Mount options parsed okay.
435 * <return> 0 Error parsing mount options.
438 * July 1, 1997 - Andrew E. Mileski
439 * Written, tested, and released.
443 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
444 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
445 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
446 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
447 Opt_rootdir, Opt_utf8, Opt_iocharset,
448 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
452 static const match_table_t tokens = {
453 {Opt_novrs, "novrs"},
454 {Opt_nostrict, "nostrict"},
456 {Opt_unhide, "unhide"},
457 {Opt_undelete, "undelete"},
458 {Opt_noadinicb, "noadinicb"},
459 {Opt_adinicb, "adinicb"},
460 {Opt_shortad, "shortad"},
461 {Opt_longad, "longad"},
462 {Opt_uforget, "uid=forget"},
463 {Opt_uignore, "uid=ignore"},
464 {Opt_gforget, "gid=forget"},
465 {Opt_gignore, "gid=ignore"},
468 {Opt_umask, "umask=%o"},
469 {Opt_session, "session=%u"},
470 {Opt_lastblock, "lastblock=%u"},
471 {Opt_anchor, "anchor=%u"},
472 {Opt_volume, "volume=%u"},
473 {Opt_partition, "partition=%u"},
474 {Opt_fileset, "fileset=%u"},
475 {Opt_rootdir, "rootdir=%u"},
477 {Opt_iocharset, "iocharset=%s"},
478 {Opt_fmode, "mode=%o"},
479 {Opt_dmode, "dmode=%o"},
483 static int udf_parse_options(char *options, struct udf_options *uopt,
490 uopt->partition = 0xFFFF;
491 uopt->session = 0xFFFFFFFF;
494 uopt->volume = 0xFFFFFFFF;
495 uopt->rootdir = 0xFFFFFFFF;
496 uopt->fileset = 0xFFFFFFFF;
497 uopt->nls_map = NULL;
502 while ((p = strsep(&options, ",")) != NULL) {
503 substring_t args[MAX_OPT_ARGS];
509 token = match_token(p, tokens, args);
515 if (match_int(&args[0], &option))
518 if (n != 512 && n != 1024 && n != 2048 && n != 4096)
521 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
524 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
527 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
530 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
533 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
536 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
539 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
542 if (match_int(args, &option))
544 uopt->gid = make_kgid(current_user_ns(), option);
545 if (!gid_valid(uopt->gid))
547 uopt->flags |= (1 << UDF_FLAG_GID_SET);
550 if (match_int(args, &option))
552 uopt->uid = make_kuid(current_user_ns(), option);
553 if (!uid_valid(uopt->uid))
555 uopt->flags |= (1 << UDF_FLAG_UID_SET);
558 if (match_octal(args, &option))
560 uopt->umask = option;
563 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
566 if (match_int(args, &option))
568 uopt->session = option;
570 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
573 if (match_int(args, &option))
575 uopt->lastblock = option;
577 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
580 if (match_int(args, &option))
582 uopt->anchor = option;
585 if (match_int(args, &option))
587 uopt->volume = option;
590 if (match_int(args, &option))
592 uopt->partition = option;
595 if (match_int(args, &option))
597 uopt->fileset = option;
600 if (match_int(args, &option))
602 uopt->rootdir = option;
605 uopt->flags |= (1 << UDF_FLAG_UTF8);
607 #ifdef CONFIG_UDF_NLS
609 uopt->nls_map = load_nls(args[0].from);
610 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
614 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
617 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
620 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
623 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
626 if (match_octal(args, &option))
628 uopt->fmode = option & 0777;
631 if (match_octal(args, &option))
633 uopt->dmode = option & 0777;
636 pr_err("bad mount option \"%s\" or missing value\n", p);
643 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
645 struct udf_options uopt;
646 struct udf_sb_info *sbi = UDF_SB(sb);
648 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
652 int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
653 if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & SB_RDONLY))
657 uopt.flags = sbi->s_flags;
658 uopt.uid = sbi->s_uid;
659 uopt.gid = sbi->s_gid;
660 uopt.umask = sbi->s_umask;
661 uopt.fmode = sbi->s_fmode;
662 uopt.dmode = sbi->s_dmode;
664 if (!udf_parse_options(options, &uopt, true))
667 write_lock(&sbi->s_cred_lock);
668 sbi->s_flags = uopt.flags;
669 sbi->s_uid = uopt.uid;
670 sbi->s_gid = uopt.gid;
671 sbi->s_umask = uopt.umask;
672 sbi->s_fmode = uopt.fmode;
673 sbi->s_dmode = uopt.dmode;
674 write_unlock(&sbi->s_cred_lock);
676 if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb))
679 if (*flags & SB_RDONLY)
688 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
689 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
690 static loff_t udf_check_vsd(struct super_block *sb)
692 struct volStructDesc *vsd = NULL;
693 loff_t sector = VSD_FIRST_SECTOR_OFFSET;
695 struct buffer_head *bh = NULL;
698 struct udf_sb_info *sbi;
701 if (sb->s_blocksize < sizeof(struct volStructDesc))
702 sectorsize = sizeof(struct volStructDesc);
704 sectorsize = sb->s_blocksize;
706 sector += (((loff_t)sbi->s_session) << sb->s_blocksize_bits);
708 udf_debug("Starting at sector %u (%lu byte sectors)\n",
709 (unsigned int)(sector >> sb->s_blocksize_bits),
711 /* Process the sequence (if applicable). The hard limit on the sector
712 * offset is arbitrary, hopefully large enough so that all valid UDF
713 * filesystems will be recognised. There is no mention of an upper
714 * bound to the size of the volume recognition area in the standard.
715 * The limit will prevent the code to read all the sectors of a
716 * specially crafted image (like a bluray disc full of CD001 sectors),
717 * potentially causing minutes or even hours of uninterruptible I/O
718 * activity. This actually happened with uninitialised SSD partitions
719 * (all 0xFF) before the check for the limit and all valid IDs were
721 for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET;
722 sector += sectorsize) {
724 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
728 /* Look for ISO descriptors */
729 vsd = (struct volStructDesc *)(bh->b_data +
730 (sector & (sb->s_blocksize - 1)));
732 if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
734 switch (vsd->structType) {
736 udf_debug("ISO9660 Boot Record found\n");
739 udf_debug("ISO9660 Primary Volume Descriptor found\n");
742 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
745 udf_debug("ISO9660 Volume Partition Descriptor found\n");
748 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
751 udf_debug("ISO9660 VRS (%u) found\n",
755 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
758 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
762 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
765 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
768 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2,
771 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02,
775 /* invalid id : end of volume recognition area */
786 else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) ==
787 VSD_FIRST_SECTOR_OFFSET)
793 static int udf_find_fileset(struct super_block *sb,
794 struct kernel_lb_addr *fileset,
795 struct kernel_lb_addr *root)
797 struct buffer_head *bh = NULL;
800 struct udf_sb_info *sbi;
802 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
803 fileset->partitionReferenceNum != 0xFFFF) {
804 bh = udf_read_ptagged(sb, fileset, 0, &ident);
808 } else if (ident != TAG_IDENT_FSD) {
817 /* Search backwards through the partitions */
818 struct kernel_lb_addr newfileset;
820 /* --> cvg: FIXME - is it reasonable? */
823 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
824 (newfileset.partitionReferenceNum != 0xFFFF &&
825 fileset->logicalBlockNum == 0xFFFFFFFF &&
826 fileset->partitionReferenceNum == 0xFFFF);
827 newfileset.partitionReferenceNum--) {
828 lastblock = sbi->s_partmaps
829 [newfileset.partitionReferenceNum]
831 newfileset.logicalBlockNum = 0;
834 bh = udf_read_ptagged(sb, &newfileset, 0,
837 newfileset.logicalBlockNum++;
844 struct spaceBitmapDesc *sp;
845 sp = (struct spaceBitmapDesc *)
847 newfileset.logicalBlockNum += 1 +
848 ((le32_to_cpu(sp->numOfBytes) +
849 sizeof(struct spaceBitmapDesc)
850 - 1) >> sb->s_blocksize_bits);
855 *fileset = newfileset;
858 newfileset.logicalBlockNum++;
863 } while (newfileset.logicalBlockNum < lastblock &&
864 fileset->logicalBlockNum == 0xFFFFFFFF &&
865 fileset->partitionReferenceNum == 0xFFFF);
869 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
870 fileset->partitionReferenceNum != 0xFFFF) && bh) {
871 udf_debug("Fileset at block=%u, partition=%u\n",
872 fileset->logicalBlockNum,
873 fileset->partitionReferenceNum);
875 sbi->s_partition = fileset->partitionReferenceNum;
876 udf_load_fileset(sb, bh, root);
884 * Load primary Volume Descriptor Sequence
886 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
889 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
891 struct primaryVolDesc *pvoldesc;
893 struct buffer_head *bh;
897 outstr = kmalloc(128, GFP_NOFS);
901 bh = udf_read_tagged(sb, block, block, &ident);
907 if (ident != TAG_IDENT_PVD) {
912 pvoldesc = (struct primaryVolDesc *)bh->b_data;
914 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
915 pvoldesc->recordingDateAndTime)) {
917 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
918 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
919 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
920 ts->minute, le16_to_cpu(ts->typeAndTimezone));
924 ret = udf_dstrCS0toUTF8(outstr, 31, pvoldesc->volIdent, 32);
928 strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret);
929 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
931 ret = udf_dstrCS0toUTF8(outstr, 127, pvoldesc->volSetIdent, 128);
936 udf_debug("volSetIdent[] = '%s'\n", outstr);
946 struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
947 u32 meta_file_loc, u32 partition_ref)
949 struct kernel_lb_addr addr;
950 struct inode *metadata_fe;
952 addr.logicalBlockNum = meta_file_loc;
953 addr.partitionReferenceNum = partition_ref;
955 metadata_fe = udf_iget_special(sb, &addr);
957 if (IS_ERR(metadata_fe)) {
958 udf_warn(sb, "metadata inode efe not found\n");
961 if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
962 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
964 return ERR_PTR(-EIO);
970 static int udf_load_metadata_files(struct super_block *sb, int partition,
973 struct udf_sb_info *sbi = UDF_SB(sb);
974 struct udf_part_map *map;
975 struct udf_meta_data *mdata;
976 struct kernel_lb_addr addr;
979 map = &sbi->s_partmaps[partition];
980 mdata = &map->s_type_specific.s_metadata;
981 mdata->s_phys_partition_ref = type1_index;
983 /* metadata address */
984 udf_debug("Metadata file location: block = %u part = %u\n",
985 mdata->s_meta_file_loc, mdata->s_phys_partition_ref);
987 fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc,
988 mdata->s_phys_partition_ref);
990 /* mirror file entry */
991 udf_debug("Mirror metadata file location: block = %u part = %u\n",
992 mdata->s_mirror_file_loc, mdata->s_phys_partition_ref);
994 fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc,
995 mdata->s_phys_partition_ref);
998 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
1001 mdata->s_mirror_fe = fe;
1003 mdata->s_metadata_fe = fe;
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 = mdata->s_phys_partition_ref;
1015 udf_debug("Bitmap file location: block = %u part = %u\n",
1016 addr.logicalBlockNum, addr.partitionReferenceNum);
1018 fe = udf_iget_special(sb, &addr);
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");
1027 mdata->s_bitmap_fe = fe;
1030 udf_debug("udf_load_metadata_files Ok\n");
1034 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
1035 struct kernel_lb_addr *root)
1037 struct fileSetDesc *fset;
1039 fset = (struct fileSetDesc *)bh->b_data;
1041 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1043 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1045 udf_debug("Rootdir at block=%u, partition=%u\n",
1046 root->logicalBlockNum, root->partitionReferenceNum);
1049 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1051 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
1052 return DIV_ROUND_UP(map->s_partition_len +
1053 (sizeof(struct spaceBitmapDesc) << 3),
1054 sb->s_blocksize * 8);
1057 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1059 struct udf_bitmap *bitmap;
1063 nr_groups = udf_compute_nr_groups(sb, index);
1064 size = sizeof(struct udf_bitmap) +
1065 (sizeof(struct buffer_head *) * nr_groups);
1067 if (size <= PAGE_SIZE)
1068 bitmap = kzalloc(size, GFP_KERNEL);
1070 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
1075 bitmap->s_nr_groups = nr_groups;
1079 static int udf_fill_partdesc_info(struct super_block *sb,
1080 struct partitionDesc *p, int p_index)
1082 struct udf_part_map *map;
1083 struct udf_sb_info *sbi = UDF_SB(sb);
1084 struct partitionHeaderDesc *phd;
1086 map = &sbi->s_partmaps[p_index];
1088 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1089 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1091 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1092 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1093 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1094 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1095 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1096 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1097 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1098 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1100 udf_debug("Partition (%d type %x) starts at physical %u, block length %u\n",
1101 p_index, map->s_partition_type,
1102 map->s_partition_root, map->s_partition_len);
1104 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1105 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1108 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1109 if (phd->unallocSpaceTable.extLength) {
1110 struct kernel_lb_addr loc = {
1111 .logicalBlockNum = le32_to_cpu(
1112 phd->unallocSpaceTable.extPosition),
1113 .partitionReferenceNum = p_index,
1115 struct inode *inode;
1117 inode = udf_iget_special(sb, &loc);
1118 if (IS_ERR(inode)) {
1119 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1121 return PTR_ERR(inode);
1123 map->s_uspace.s_table = inode;
1124 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1125 udf_debug("unallocSpaceTable (part %d) @ %lu\n",
1126 p_index, map->s_uspace.s_table->i_ino);
1129 if (phd->unallocSpaceBitmap.extLength) {
1130 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1133 map->s_uspace.s_bitmap = bitmap;
1134 bitmap->s_extPosition = le32_to_cpu(
1135 phd->unallocSpaceBitmap.extPosition);
1136 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1137 udf_debug("unallocSpaceBitmap (part %d) @ %u\n",
1138 p_index, bitmap->s_extPosition);
1141 if (phd->partitionIntegrityTable.extLength)
1142 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1144 if (phd->freedSpaceTable.extLength) {
1145 struct kernel_lb_addr loc = {
1146 .logicalBlockNum = le32_to_cpu(
1147 phd->freedSpaceTable.extPosition),
1148 .partitionReferenceNum = p_index,
1150 struct inode *inode;
1152 inode = udf_iget_special(sb, &loc);
1153 if (IS_ERR(inode)) {
1154 udf_debug("cannot load freedSpaceTable (part %d)\n",
1156 return PTR_ERR(inode);
1158 map->s_fspace.s_table = inode;
1159 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1160 udf_debug("freedSpaceTable (part %d) @ %lu\n",
1161 p_index, map->s_fspace.s_table->i_ino);
1164 if (phd->freedSpaceBitmap.extLength) {
1165 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1168 map->s_fspace.s_bitmap = bitmap;
1169 bitmap->s_extPosition = le32_to_cpu(
1170 phd->freedSpaceBitmap.extPosition);
1171 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1172 udf_debug("freedSpaceBitmap (part %d) @ %u\n",
1173 p_index, bitmap->s_extPosition);
1178 static void udf_find_vat_block(struct super_block *sb, int p_index,
1179 int type1_index, sector_t start_block)
1181 struct udf_sb_info *sbi = UDF_SB(sb);
1182 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1184 struct kernel_lb_addr ino;
1185 struct inode *inode;
1188 * VAT file entry is in the last recorded block. Some broken disks have
1189 * it a few blocks before so try a bit harder...
1191 ino.partitionReferenceNum = type1_index;
1192 for (vat_block = start_block;
1193 vat_block >= map->s_partition_root &&
1194 vat_block >= start_block - 3; vat_block--) {
1195 ino.logicalBlockNum = vat_block - map->s_partition_root;
1196 inode = udf_iget_special(sb, &ino);
1197 if (!IS_ERR(inode)) {
1198 sbi->s_vat_inode = inode;
1204 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1206 struct udf_sb_info *sbi = UDF_SB(sb);
1207 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1208 struct buffer_head *bh = NULL;
1209 struct udf_inode_info *vati;
1211 struct virtualAllocationTable20 *vat20;
1212 sector_t blocks = i_size_read(sb->s_bdev->bd_inode) >>
1213 sb->s_blocksize_bits;
1215 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
1216 if (!sbi->s_vat_inode &&
1217 sbi->s_last_block != blocks - 1) {
1218 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1219 (unsigned long)sbi->s_last_block,
1220 (unsigned long)blocks - 1);
1221 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
1223 if (!sbi->s_vat_inode)
1226 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1227 map->s_type_specific.s_virtual.s_start_offset = 0;
1228 map->s_type_specific.s_virtual.s_num_entries =
1229 (sbi->s_vat_inode->i_size - 36) >> 2;
1230 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1231 vati = UDF_I(sbi->s_vat_inode);
1232 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1233 pos = udf_block_map(sbi->s_vat_inode, 0);
1234 bh = sb_bread(sb, pos);
1237 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1239 vat20 = (struct virtualAllocationTable20 *)
1243 map->s_type_specific.s_virtual.s_start_offset =
1244 le16_to_cpu(vat20->lengthHeader);
1245 map->s_type_specific.s_virtual.s_num_entries =
1246 (sbi->s_vat_inode->i_size -
1247 map->s_type_specific.s_virtual.
1248 s_start_offset) >> 2;
1255 * Load partition descriptor block
1257 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1260 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1262 struct buffer_head *bh;
1263 struct partitionDesc *p;
1264 struct udf_part_map *map;
1265 struct udf_sb_info *sbi = UDF_SB(sb);
1267 uint16_t partitionNumber;
1271 bh = udf_read_tagged(sb, block, block, &ident);
1274 if (ident != TAG_IDENT_PD) {
1279 p = (struct partitionDesc *)bh->b_data;
1280 partitionNumber = le16_to_cpu(p->partitionNumber);
1282 /* First scan for TYPE1 and SPARABLE partitions */
1283 for (i = 0; i < sbi->s_partitions; i++) {
1284 map = &sbi->s_partmaps[i];
1285 udf_debug("Searching map: (%u == %u)\n",
1286 map->s_partition_num, partitionNumber);
1287 if (map->s_partition_num == partitionNumber &&
1288 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1289 map->s_partition_type == UDF_SPARABLE_MAP15))
1293 if (i >= sbi->s_partitions) {
1294 udf_debug("Partition (%u) not found in partition map\n",
1300 ret = udf_fill_partdesc_info(sb, p, i);
1305 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1306 * PHYSICAL partitions are already set up
1310 map = NULL; /* supress 'maybe used uninitialized' warning */
1312 for (i = 0; i < sbi->s_partitions; i++) {
1313 map = &sbi->s_partmaps[i];
1315 if (map->s_partition_num == partitionNumber &&
1316 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1317 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1318 map->s_partition_type == UDF_METADATA_MAP25))
1322 if (i >= sbi->s_partitions) {
1327 ret = udf_fill_partdesc_info(sb, p, i);
1331 if (map->s_partition_type == UDF_METADATA_MAP25) {
1332 ret = udf_load_metadata_files(sb, i, type1_idx);
1334 udf_err(sb, "error loading MetaData partition map %d\n",
1340 * If we have a partition with virtual map, we don't handle
1341 * writing to it (we overwrite blocks instead of relocating
1344 if (!sb_rdonly(sb)) {
1348 ret = udf_load_vat(sb, i, type1_idx);
1354 /* In case loading failed, we handle cleanup in udf_fill_super */
1359 static int udf_load_sparable_map(struct super_block *sb,
1360 struct udf_part_map *map,
1361 struct sparablePartitionMap *spm)
1365 struct sparingTable *st;
1366 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1368 struct buffer_head *bh;
1370 map->s_partition_type = UDF_SPARABLE_MAP15;
1371 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1372 if (!is_power_of_2(sdata->s_packet_len)) {
1373 udf_err(sb, "error loading logical volume descriptor: "
1374 "Invalid packet length %u\n",
1375 (unsigned)sdata->s_packet_len);
1378 if (spm->numSparingTables > 4) {
1379 udf_err(sb, "error loading logical volume descriptor: "
1380 "Too many sparing tables (%d)\n",
1381 (int)spm->numSparingTables);
1385 for (i = 0; i < spm->numSparingTables; i++) {
1386 loc = le32_to_cpu(spm->locSparingTable[i]);
1387 bh = udf_read_tagged(sb, loc, loc, &ident);
1391 st = (struct sparingTable *)bh->b_data;
1393 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1394 strlen(UDF_ID_SPARING)) ||
1395 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1401 sdata->s_spar_map[i] = bh;
1403 map->s_partition_func = udf_get_pblock_spar15;
1407 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1408 struct kernel_lb_addr *fileset)
1410 struct logicalVolDesc *lvd;
1413 struct udf_sb_info *sbi = UDF_SB(sb);
1414 struct genericPartitionMap *gpm;
1416 struct buffer_head *bh;
1417 unsigned int table_len;
1420 bh = udf_read_tagged(sb, block, block, &ident);
1423 BUG_ON(ident != TAG_IDENT_LVD);
1424 lvd = (struct logicalVolDesc *)bh->b_data;
1425 table_len = le32_to_cpu(lvd->mapTableLength);
1426 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
1427 udf_err(sb, "error loading logical volume descriptor: "
1428 "Partition table too long (%u > %lu)\n", table_len,
1429 sb->s_blocksize - sizeof(*lvd));
1434 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1438 for (i = 0, offset = 0;
1439 i < sbi->s_partitions && offset < table_len;
1440 i++, offset += gpm->partitionMapLength) {
1441 struct udf_part_map *map = &sbi->s_partmaps[i];
1442 gpm = (struct genericPartitionMap *)
1443 &(lvd->partitionMaps[offset]);
1444 type = gpm->partitionMapType;
1446 struct genericPartitionMap1 *gpm1 =
1447 (struct genericPartitionMap1 *)gpm;
1448 map->s_partition_type = UDF_TYPE1_MAP15;
1449 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1450 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1451 map->s_partition_func = NULL;
1452 } else if (type == 2) {
1453 struct udfPartitionMap2 *upm2 =
1454 (struct udfPartitionMap2 *)gpm;
1455 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1456 strlen(UDF_ID_VIRTUAL))) {
1458 le16_to_cpu(((__le16 *)upm2->partIdent.
1461 map->s_partition_type =
1463 map->s_partition_func =
1464 udf_get_pblock_virt15;
1466 map->s_partition_type =
1468 map->s_partition_func =
1469 udf_get_pblock_virt20;
1471 } else if (!strncmp(upm2->partIdent.ident,
1473 strlen(UDF_ID_SPARABLE))) {
1474 ret = udf_load_sparable_map(sb, map,
1475 (struct sparablePartitionMap *)gpm);
1478 } else if (!strncmp(upm2->partIdent.ident,
1480 strlen(UDF_ID_METADATA))) {
1481 struct udf_meta_data *mdata =
1482 &map->s_type_specific.s_metadata;
1483 struct metadataPartitionMap *mdm =
1484 (struct metadataPartitionMap *)
1485 &(lvd->partitionMaps[offset]);
1486 udf_debug("Parsing Logical vol part %d type %u id=%s\n",
1487 i, type, UDF_ID_METADATA);
1489 map->s_partition_type = UDF_METADATA_MAP25;
1490 map->s_partition_func = udf_get_pblock_meta25;
1492 mdata->s_meta_file_loc =
1493 le32_to_cpu(mdm->metadataFileLoc);
1494 mdata->s_mirror_file_loc =
1495 le32_to_cpu(mdm->metadataMirrorFileLoc);
1496 mdata->s_bitmap_file_loc =
1497 le32_to_cpu(mdm->metadataBitmapFileLoc);
1498 mdata->s_alloc_unit_size =
1499 le32_to_cpu(mdm->allocUnitSize);
1500 mdata->s_align_unit_size =
1501 le16_to_cpu(mdm->alignUnitSize);
1502 if (mdm->flags & 0x01)
1503 mdata->s_flags |= MF_DUPLICATE_MD;
1505 udf_debug("Metadata Ident suffix=0x%x\n",
1506 le16_to_cpu(*(__le16 *)
1507 mdm->partIdent.identSuffix));
1508 udf_debug("Metadata part num=%u\n",
1509 le16_to_cpu(mdm->partitionNum));
1510 udf_debug("Metadata part alloc unit size=%u\n",
1511 le32_to_cpu(mdm->allocUnitSize));
1512 udf_debug("Metadata file loc=%u\n",
1513 le32_to_cpu(mdm->metadataFileLoc));
1514 udf_debug("Mirror file loc=%u\n",
1515 le32_to_cpu(mdm->metadataMirrorFileLoc));
1516 udf_debug("Bitmap file loc=%u\n",
1517 le32_to_cpu(mdm->metadataBitmapFileLoc));
1518 udf_debug("Flags: %d %u\n",
1519 mdata->s_flags, mdm->flags);
1521 udf_debug("Unknown ident: %s\n",
1522 upm2->partIdent.ident);
1525 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1526 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1528 udf_debug("Partition (%d:%u) type %u on volume %u\n",
1529 i, map->s_partition_num, type, map->s_volumeseqnum);
1533 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1535 *fileset = lelb_to_cpu(la->extLocation);
1536 udf_debug("FileSet found in LogicalVolDesc at block=%u, partition=%u\n",
1537 fileset->logicalBlockNum,
1538 fileset->partitionReferenceNum);
1540 if (lvd->integritySeqExt.extLength)
1541 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1549 * Find the prevailing Logical Volume Integrity Descriptor.
1551 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1553 struct buffer_head *bh, *final_bh;
1555 struct udf_sb_info *sbi = UDF_SB(sb);
1556 struct logicalVolIntegrityDesc *lvid;
1557 int indirections = 0;
1559 while (++indirections <= UDF_MAX_LVID_NESTING) {
1561 while (loc.extLength > 0 &&
1562 (bh = udf_read_tagged(sb, loc.extLocation,
1563 loc.extLocation, &ident))) {
1564 if (ident != TAG_IDENT_LVID) {
1572 loc.extLength -= sb->s_blocksize;
1579 brelse(sbi->s_lvid_bh);
1580 sbi->s_lvid_bh = final_bh;
1582 lvid = (struct logicalVolIntegrityDesc *)final_bh->b_data;
1583 if (lvid->nextIntegrityExt.extLength == 0)
1586 loc = leea_to_cpu(lvid->nextIntegrityExt);
1589 udf_warn(sb, "Too many LVID indirections (max %u), ignoring.\n",
1590 UDF_MAX_LVID_NESTING);
1591 brelse(sbi->s_lvid_bh);
1592 sbi->s_lvid_bh = NULL;
1597 * Process a main/reserve volume descriptor sequence.
1598 * @block First block of first extent of the sequence.
1599 * @lastblock Lastblock of first extent of the sequence.
1600 * @fileset There we store extent containing root fileset
1602 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1605 static noinline int udf_process_sequence(
1606 struct super_block *sb,
1607 sector_t block, sector_t lastblock,
1608 struct kernel_lb_addr *fileset)
1610 struct buffer_head *bh = NULL;
1611 struct udf_vds_record vds[VDS_POS_LENGTH];
1612 struct udf_vds_record *curr;
1613 struct generic_desc *gd;
1614 struct volDescPtr *vdp;
1618 long next_s = 0, next_e = 0;
1620 unsigned int indirections = 0;
1622 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1625 * Read the main descriptor sequence and find which descriptors
1628 for (; (!done && block <= lastblock); block++) {
1630 bh = udf_read_tagged(sb, block, block, &ident);
1633 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1634 (unsigned long long)block);
1638 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1639 gd = (struct generic_desc *)bh->b_data;
1640 vdsn = le32_to_cpu(gd->volDescSeqNum);
1642 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1643 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1644 if (vdsn >= curr->volDescSeqNum) {
1645 curr->volDescSeqNum = vdsn;
1646 curr->block = block;
1649 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1650 curr = &vds[VDS_POS_VOL_DESC_PTR];
1651 if (vdsn >= curr->volDescSeqNum) {
1652 curr->volDescSeqNum = vdsn;
1653 curr->block = block;
1655 vdp = (struct volDescPtr *)bh->b_data;
1656 next_s = le32_to_cpu(
1657 vdp->nextVolDescSeqExt.extLocation);
1658 next_e = le32_to_cpu(
1659 vdp->nextVolDescSeqExt.extLength);
1660 next_e = next_e >> sb->s_blocksize_bits;
1664 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1665 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1666 if (vdsn >= curr->volDescSeqNum) {
1667 curr->volDescSeqNum = vdsn;
1668 curr->block = block;
1671 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1672 curr = &vds[VDS_POS_PARTITION_DESC];
1674 curr->block = block;
1676 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1677 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1678 if (vdsn >= curr->volDescSeqNum) {
1679 curr->volDescSeqNum = vdsn;
1680 curr->block = block;
1683 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1684 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1685 if (vdsn >= curr->volDescSeqNum) {
1686 curr->volDescSeqNum = vdsn;
1687 curr->block = block;
1690 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1691 if (++indirections > UDF_MAX_TD_NESTING) {
1692 udf_err(sb, "too many TDs (max %u supported)\n", UDF_MAX_TD_NESTING);
1697 vds[VDS_POS_TERMINATING_DESC].block = block;
1701 next_s = next_e = 0;
1709 * Now read interesting descriptors again and process them
1710 * in a suitable order
1712 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1713 udf_err(sb, "Primary Volume Descriptor not found!\n");
1716 ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
1720 if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1721 ret = udf_load_logicalvol(sb,
1722 vds[VDS_POS_LOGICAL_VOL_DESC].block,
1728 if (vds[VDS_POS_PARTITION_DESC].block) {
1730 * We rescan the whole descriptor sequence to find
1731 * partition descriptor blocks and process them.
1733 for (block = vds[VDS_POS_PARTITION_DESC].block;
1734 block < vds[VDS_POS_TERMINATING_DESC].block;
1736 ret = udf_load_partdesc(sb, block);
1746 * Load Volume Descriptor Sequence described by anchor in bh
1748 * Returns <0 on error, 0 on success
1750 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1751 struct kernel_lb_addr *fileset)
1753 struct anchorVolDescPtr *anchor;
1754 sector_t main_s, main_e, reserve_s, reserve_e;
1757 anchor = (struct anchorVolDescPtr *)bh->b_data;
1759 /* Locate the main sequence */
1760 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1761 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1762 main_e = main_e >> sb->s_blocksize_bits;
1765 /* Locate the reserve sequence */
1766 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1767 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1768 reserve_e = reserve_e >> sb->s_blocksize_bits;
1769 reserve_e += reserve_s;
1771 /* Process the main & reserve sequences */
1772 /* responsible for finding the PartitionDesc(s) */
1773 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1776 udf_sb_free_partitions(sb);
1777 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1779 udf_sb_free_partitions(sb);
1780 /* No sequence was OK, return -EIO */
1788 * Check whether there is an anchor block in the given block and
1789 * load Volume Descriptor Sequence if so.
1791 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1794 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1795 struct kernel_lb_addr *fileset)
1797 struct buffer_head *bh;
1801 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1802 udf_fixed_to_variable(block) >=
1803 i_size_read(sb->s_bdev->bd_inode) >> sb->s_blocksize_bits)
1806 bh = udf_read_tagged(sb, block, block, &ident);
1809 if (ident != TAG_IDENT_AVDP) {
1813 ret = udf_load_sequence(sb, bh, fileset);
1819 * Search for an anchor volume descriptor pointer.
1821 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1824 static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1825 struct kernel_lb_addr *fileset)
1829 struct udf_sb_info *sbi = UDF_SB(sb);
1833 /* First try user provided anchor */
1834 if (sbi->s_anchor) {
1835 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1840 * according to spec, anchor is in either:
1844 * however, if the disc isn't closed, it could be 512.
1846 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1850 * The trouble is which block is the last one. Drives often misreport
1851 * this so we try various possibilities.
1853 last[last_count++] = *lastblock;
1854 if (*lastblock >= 1)
1855 last[last_count++] = *lastblock - 1;
1856 last[last_count++] = *lastblock + 1;
1857 if (*lastblock >= 2)
1858 last[last_count++] = *lastblock - 2;
1859 if (*lastblock >= 150)
1860 last[last_count++] = *lastblock - 150;
1861 if (*lastblock >= 152)
1862 last[last_count++] = *lastblock - 152;
1864 for (i = 0; i < last_count; i++) {
1865 if (last[i] >= i_size_read(sb->s_bdev->bd_inode) >>
1866 sb->s_blocksize_bits)
1868 ret = udf_check_anchor_block(sb, last[i], fileset);
1869 if (ret != -EAGAIN) {
1871 *lastblock = last[i];
1876 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1877 if (ret != -EAGAIN) {
1879 *lastblock = last[i];
1884 /* Finally try block 512 in case media is open */
1885 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
1889 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1890 * area specified by it. The function expects sbi->s_lastblock to be the last
1891 * block on the media.
1893 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1896 static int udf_find_anchor(struct super_block *sb,
1897 struct kernel_lb_addr *fileset)
1899 struct udf_sb_info *sbi = UDF_SB(sb);
1900 sector_t lastblock = sbi->s_last_block;
1903 ret = udf_scan_anchors(sb, &lastblock, fileset);
1907 /* No anchor found? Try VARCONV conversion of block numbers */
1908 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1909 lastblock = udf_variable_to_fixed(sbi->s_last_block);
1910 /* Firstly, we try to not convert number of the last block */
1911 ret = udf_scan_anchors(sb, &lastblock, fileset);
1915 lastblock = sbi->s_last_block;
1916 /* Secondly, we try with converted number of the last block */
1917 ret = udf_scan_anchors(sb, &lastblock, fileset);
1919 /* VARCONV didn't help. Clear it. */
1920 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1924 sbi->s_last_block = lastblock;
1929 * Check Volume Structure Descriptor, find Anchor block and load Volume
1930 * Descriptor Sequence.
1932 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1933 * block was not found.
1935 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1936 int silent, struct kernel_lb_addr *fileset)
1938 struct udf_sb_info *sbi = UDF_SB(sb);
1942 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1944 udf_warn(sb, "Bad block size\n");
1947 sbi->s_last_block = uopt->lastblock;
1949 /* Check that it is NSR02 compliant */
1950 nsr_off = udf_check_vsd(sb);
1953 udf_warn(sb, "No VRS found\n");
1957 udf_debug("Failed to read sector at offset %d. "
1958 "Assuming open disc. Skipping validity "
1959 "check\n", VSD_FIRST_SECTOR_OFFSET);
1960 if (!sbi->s_last_block)
1961 sbi->s_last_block = udf_get_last_block(sb);
1963 udf_debug("Validity check skipped because of novrs option\n");
1966 /* Look for anchor block and load Volume Descriptor Sequence */
1967 sbi->s_anchor = uopt->anchor;
1968 ret = udf_find_anchor(sb, fileset);
1970 if (!silent && ret == -EAGAIN)
1971 udf_warn(sb, "No anchor found\n");
1977 static void udf_open_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;
1987 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1988 lvidiu = udf_sb_lvidiu(sb);
1992 mutex_lock(&sbi->s_alloc_mutex);
1993 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1994 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1995 ktime_get_real_ts(&ts);
1996 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
1997 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
1999 lvid->descTag.descCRC = cpu_to_le16(
2000 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
2001 le16_to_cpu(lvid->descTag.descCRCLength)));
2003 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
2004 mark_buffer_dirty(bh);
2005 sbi->s_lvid_dirty = 0;
2006 mutex_unlock(&sbi->s_alloc_mutex);
2007 /* Make opening of filesystem visible on the media immediately */
2008 sync_dirty_buffer(bh);
2011 static void udf_close_lvid(struct super_block *sb)
2013 struct udf_sb_info *sbi = UDF_SB(sb);
2014 struct buffer_head *bh = sbi->s_lvid_bh;
2015 struct logicalVolIntegrityDesc *lvid;
2016 struct logicalVolIntegrityDescImpUse *lvidiu;
2021 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2022 lvidiu = udf_sb_lvidiu(sb);
2026 mutex_lock(&sbi->s_alloc_mutex);
2027 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
2028 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
2029 ktime_get_real_ts(&ts);
2030 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
2031 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
2032 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
2033 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
2034 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
2035 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
2036 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
2037 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
2039 lvid->descTag.descCRC = cpu_to_le16(
2040 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
2041 le16_to_cpu(lvid->descTag.descCRCLength)));
2043 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
2045 * We set buffer uptodate unconditionally here to avoid spurious
2046 * warnings from mark_buffer_dirty() when previous EIO has marked
2047 * the buffer as !uptodate
2049 set_buffer_uptodate(bh);
2050 mark_buffer_dirty(bh);
2051 sbi->s_lvid_dirty = 0;
2052 mutex_unlock(&sbi->s_alloc_mutex);
2053 /* Make closing of filesystem visible on the media immediately */
2054 sync_dirty_buffer(bh);
2057 u64 lvid_get_unique_id(struct super_block *sb)
2059 struct buffer_head *bh;
2060 struct udf_sb_info *sbi = UDF_SB(sb);
2061 struct logicalVolIntegrityDesc *lvid;
2062 struct logicalVolHeaderDesc *lvhd;
2066 bh = sbi->s_lvid_bh;
2070 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2071 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2073 mutex_lock(&sbi->s_alloc_mutex);
2074 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2075 if (!(++uniqueID & 0xFFFFFFFF))
2077 lvhd->uniqueID = cpu_to_le64(uniqueID);
2078 mutex_unlock(&sbi->s_alloc_mutex);
2079 mark_buffer_dirty(bh);
2084 static int udf_fill_super(struct super_block *sb, void *options, int silent)
2087 struct inode *inode = NULL;
2088 struct udf_options uopt;
2089 struct kernel_lb_addr rootdir, fileset;
2090 struct udf_sb_info *sbi;
2091 bool lvid_open = false;
2093 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
2094 uopt.uid = INVALID_UID;
2095 uopt.gid = INVALID_GID;
2097 uopt.fmode = UDF_INVALID_MODE;
2098 uopt.dmode = UDF_INVALID_MODE;
2100 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
2104 sb->s_fs_info = sbi;
2106 mutex_init(&sbi->s_alloc_mutex);
2108 if (!udf_parse_options((char *)options, &uopt, false))
2109 goto parse_options_failure;
2111 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
2112 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
2113 udf_err(sb, "utf8 cannot be combined with iocharset\n");
2114 goto parse_options_failure;
2116 #ifdef CONFIG_UDF_NLS
2117 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
2118 uopt.nls_map = load_nls_default();
2120 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2122 udf_debug("Using default NLS map\n");
2125 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2126 uopt.flags |= (1 << UDF_FLAG_UTF8);
2128 fileset.logicalBlockNum = 0xFFFFFFFF;
2129 fileset.partitionReferenceNum = 0xFFFF;
2131 sbi->s_flags = uopt.flags;
2132 sbi->s_uid = uopt.uid;
2133 sbi->s_gid = uopt.gid;
2134 sbi->s_umask = uopt.umask;
2135 sbi->s_fmode = uopt.fmode;
2136 sbi->s_dmode = uopt.dmode;
2137 sbi->s_nls_map = uopt.nls_map;
2138 rwlock_init(&sbi->s_cred_lock);
2140 if (uopt.session == 0xFFFFFFFF)
2141 sbi->s_session = udf_get_last_session(sb);
2143 sbi->s_session = uopt.session;
2145 udf_debug("Multi-session=%d\n", sbi->s_session);
2147 /* Fill in the rest of the superblock */
2148 sb->s_op = &udf_sb_ops;
2149 sb->s_export_op = &udf_export_ops;
2151 sb->s_magic = UDF_SUPER_MAGIC;
2152 sb->s_time_gran = 1000;
2154 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
2155 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2157 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
2158 while (uopt.blocksize <= 4096) {
2159 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2161 if (!silent && ret != -EACCES) {
2162 pr_notice("Scanning with blocksize %u failed\n",
2165 brelse(sbi->s_lvid_bh);
2166 sbi->s_lvid_bh = NULL;
2168 * EACCES is special - we want to propagate to
2169 * upper layers that we cannot handle RW mount.
2176 uopt.blocksize <<= 1;
2180 if (ret == -EAGAIN) {
2181 udf_warn(sb, "No partition found (1)\n");
2187 udf_debug("Lastblock=%u\n", sbi->s_last_block);
2189 if (sbi->s_lvid_bh) {
2190 struct logicalVolIntegrityDescImpUse *lvidiu =
2192 uint16_t minUDFReadRev;
2193 uint16_t minUDFWriteRev;
2199 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2200 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
2201 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
2202 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
2204 UDF_MAX_READ_VERSION);
2207 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2213 sbi->s_udfrev = minUDFWriteRev;
2215 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2216 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2217 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2218 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2221 if (!sbi->s_partitions) {
2222 udf_warn(sb, "No partition found (2)\n");
2227 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2228 UDF_PART_FLAG_READ_ONLY &&
2234 if (udf_find_fileset(sb, &fileset, &rootdir)) {
2235 udf_warn(sb, "No fileset found\n");
2241 struct timestamp ts;
2242 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2243 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2244 sbi->s_volume_ident,
2245 le16_to_cpu(ts.year), ts.month, ts.day,
2246 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2248 if (!sb_rdonly(sb)) {
2253 /* Assign the root inode */
2254 /* assign inodes by physical block number */
2255 /* perhaps it's not extensible enough, but for now ... */
2256 inode = udf_iget(sb, &rootdir);
2257 if (IS_ERR(inode)) {
2258 udf_err(sb, "Error in udf_iget, block=%u, partition=%u\n",
2259 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2260 ret = PTR_ERR(inode);
2264 /* Allocate a dentry for the root inode */
2265 sb->s_root = d_make_root(inode);
2267 udf_err(sb, "Couldn't allocate root dentry\n");
2271 sb->s_maxbytes = MAX_LFS_FILESIZE;
2272 sb->s_max_links = UDF_MAX_LINKS;
2276 iput(sbi->s_vat_inode);
2277 parse_options_failure:
2278 #ifdef CONFIG_UDF_NLS
2279 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2280 unload_nls(sbi->s_nls_map);
2284 brelse(sbi->s_lvid_bh);
2285 udf_sb_free_partitions(sb);
2287 sb->s_fs_info = NULL;
2292 void _udf_err(struct super_block *sb, const char *function,
2293 const char *fmt, ...)
2295 struct va_format vaf;
2298 va_start(args, fmt);
2303 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2308 void _udf_warn(struct super_block *sb, const char *function,
2309 const char *fmt, ...)
2311 struct va_format vaf;
2314 va_start(args, fmt);
2319 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2324 static void udf_put_super(struct super_block *sb)
2326 struct udf_sb_info *sbi;
2330 iput(sbi->s_vat_inode);
2331 #ifdef CONFIG_UDF_NLS
2332 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2333 unload_nls(sbi->s_nls_map);
2337 brelse(sbi->s_lvid_bh);
2338 udf_sb_free_partitions(sb);
2339 mutex_destroy(&sbi->s_alloc_mutex);
2340 kfree(sb->s_fs_info);
2341 sb->s_fs_info = NULL;
2344 static int udf_sync_fs(struct super_block *sb, int wait)
2346 struct udf_sb_info *sbi = UDF_SB(sb);
2348 mutex_lock(&sbi->s_alloc_mutex);
2349 if (sbi->s_lvid_dirty) {
2351 * Blockdevice will be synced later so we don't have to submit
2354 mark_buffer_dirty(sbi->s_lvid_bh);
2355 sbi->s_lvid_dirty = 0;
2357 mutex_unlock(&sbi->s_alloc_mutex);
2362 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2364 struct super_block *sb = dentry->d_sb;
2365 struct udf_sb_info *sbi = UDF_SB(sb);
2366 struct logicalVolIntegrityDescImpUse *lvidiu;
2367 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2369 lvidiu = udf_sb_lvidiu(sb);
2370 buf->f_type = UDF_SUPER_MAGIC;
2371 buf->f_bsize = sb->s_blocksize;
2372 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2373 buf->f_bfree = udf_count_free(sb);
2374 buf->f_bavail = buf->f_bfree;
2375 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2376 le32_to_cpu(lvidiu->numDirs)) : 0)
2378 buf->f_ffree = buf->f_bfree;
2379 buf->f_namelen = UDF_NAME_LEN;
2380 buf->f_fsid.val[0] = (u32)id;
2381 buf->f_fsid.val[1] = (u32)(id >> 32);
2386 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2387 struct udf_bitmap *bitmap)
2389 struct buffer_head *bh = NULL;
2390 unsigned int accum = 0;
2392 udf_pblk_t block = 0, newblock;
2393 struct kernel_lb_addr loc;
2397 struct spaceBitmapDesc *bm;
2399 loc.logicalBlockNum = bitmap->s_extPosition;
2400 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2401 bh = udf_read_ptagged(sb, &loc, 0, &ident);
2404 udf_err(sb, "udf_count_free failed\n");
2406 } else if (ident != TAG_IDENT_SBD) {
2408 udf_err(sb, "udf_count_free failed\n");
2412 bm = (struct spaceBitmapDesc *)bh->b_data;
2413 bytes = le32_to_cpu(bm->numOfBytes);
2414 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2415 ptr = (uint8_t *)bh->b_data;
2418 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2419 accum += bitmap_weight((const unsigned long *)(ptr + index),
2424 newblock = udf_get_lb_pblock(sb, &loc, ++block);
2425 bh = udf_tread(sb, newblock);
2427 udf_debug("read failed\n");
2431 ptr = (uint8_t *)bh->b_data;
2439 static unsigned int udf_count_free_table(struct super_block *sb,
2440 struct inode *table)
2442 unsigned int accum = 0;
2444 struct kernel_lb_addr eloc;
2446 struct extent_position epos;
2448 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
2449 epos.block = UDF_I(table)->i_location;
2450 epos.offset = sizeof(struct unallocSpaceEntry);
2453 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2454 accum += (elen >> table->i_sb->s_blocksize_bits);
2457 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
2462 static unsigned int udf_count_free(struct super_block *sb)
2464 unsigned int accum = 0;
2465 struct udf_sb_info *sbi;
2466 struct udf_part_map *map;
2469 if (sbi->s_lvid_bh) {
2470 struct logicalVolIntegrityDesc *lvid =
2471 (struct logicalVolIntegrityDesc *)
2472 sbi->s_lvid_bh->b_data;
2473 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2474 accum = le32_to_cpu(
2475 lvid->freeSpaceTable[sbi->s_partition]);
2476 if (accum == 0xFFFFFFFF)
2484 map = &sbi->s_partmaps[sbi->s_partition];
2485 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2486 accum += udf_count_free_bitmap(sb,
2487 map->s_uspace.s_bitmap);
2489 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2490 accum += udf_count_free_bitmap(sb,
2491 map->s_fspace.s_bitmap);
2496 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2497 accum += udf_count_free_table(sb,
2498 map->s_uspace.s_table);
2500 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2501 accum += udf_count_free_table(sb,
2502 map->s_fspace.s_table);
2508 MODULE_AUTHOR("Ben Fennema");
2509 MODULE_DESCRIPTION("Universal Disk Format Filesystem");
2510 MODULE_LICENSE("GPL");
2511 module_init(init_udf_fs)
2512 module_exit(exit_udf_fs)