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 <asm/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 enum { UDF_MAX_LINKS = 0xffff };
81 /* These are the "meat" - everything else is stuffing */
82 static int udf_fill_super(struct super_block *, void *, int);
83 static void udf_put_super(struct super_block *);
84 static int udf_sync_fs(struct super_block *, int);
85 static int udf_remount_fs(struct super_block *, int *, char *);
86 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
87 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
88 struct kernel_lb_addr *);
89 static void udf_load_fileset(struct super_block *, struct buffer_head *,
90 struct kernel_lb_addr *);
91 static void udf_open_lvid(struct super_block *);
92 static void udf_close_lvid(struct super_block *);
93 static unsigned int udf_count_free(struct super_block *);
94 static int udf_statfs(struct dentry *, struct kstatfs *);
95 static int udf_show_options(struct seq_file *, struct dentry *);
97 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
99 struct logicalVolIntegrityDesc *lvid;
100 unsigned int partnum;
103 if (!UDF_SB(sb)->s_lvid_bh)
105 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
106 partnum = le32_to_cpu(lvid->numOfPartitions);
107 if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
108 offsetof(struct logicalVolIntegrityDesc, impUse)) /
109 (2 * sizeof(uint32_t)) < partnum) {
110 udf_err(sb, "Logical volume integrity descriptor corrupted "
111 "(numOfPartitions = %u)!\n", partnum);
114 /* The offset is to skip freeSpaceTable and sizeTable arrays */
115 offset = partnum * 2 * sizeof(uint32_t);
116 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
119 /* UDF filesystem type */
120 static struct dentry *udf_mount(struct file_system_type *fs_type,
121 int flags, const char *dev_name, void *data)
123 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
126 static struct file_system_type udf_fstype = {
127 .owner = THIS_MODULE,
130 .kill_sb = kill_block_super,
131 .fs_flags = FS_REQUIRES_DEV,
133 MODULE_ALIAS_FS("udf");
135 static struct kmem_cache *udf_inode_cachep;
137 static struct inode *udf_alloc_inode(struct super_block *sb)
139 struct udf_inode_info *ei;
140 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
145 ei->i_lenExtents = 0;
146 ei->i_next_alloc_block = 0;
147 ei->i_next_alloc_goal = 0;
149 init_rwsem(&ei->i_data_sem);
150 ei->cached_extent.lstart = -1;
151 spin_lock_init(&ei->i_extent_cache_lock);
153 return &ei->vfs_inode;
156 static void udf_i_callback(struct rcu_head *head)
158 struct inode *inode = container_of(head, struct inode, i_rcu);
159 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
162 static void udf_destroy_inode(struct inode *inode)
164 call_rcu(&inode->i_rcu, udf_i_callback);
167 static void init_once(void *foo)
169 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
171 ei->i_ext.i_data = NULL;
172 inode_init_once(&ei->vfs_inode);
175 static int init_inodecache(void)
177 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
178 sizeof(struct udf_inode_info),
179 0, (SLAB_RECLAIM_ACCOUNT |
182 if (!udf_inode_cachep)
187 static void destroy_inodecache(void)
190 * Make sure all delayed rcu free inodes are flushed before we
194 kmem_cache_destroy(udf_inode_cachep);
197 /* Superblock operations */
198 static const struct super_operations udf_sb_ops = {
199 .alloc_inode = udf_alloc_inode,
200 .destroy_inode = udf_destroy_inode,
201 .write_inode = udf_write_inode,
202 .evict_inode = udf_evict_inode,
203 .put_super = udf_put_super,
204 .sync_fs = udf_sync_fs,
205 .statfs = udf_statfs,
206 .remount_fs = udf_remount_fs,
207 .show_options = udf_show_options,
212 unsigned int blocksize;
213 unsigned int session;
214 unsigned int lastblock;
217 unsigned short partition;
218 unsigned int fileset;
219 unsigned int rootdir;
226 struct nls_table *nls_map;
229 static int __init init_udf_fs(void)
233 err = init_inodecache();
236 err = register_filesystem(&udf_fstype);
243 destroy_inodecache();
249 static void __exit exit_udf_fs(void)
251 unregister_filesystem(&udf_fstype);
252 destroy_inodecache();
255 module_init(init_udf_fs)
256 module_exit(exit_udf_fs)
258 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
260 struct udf_sb_info *sbi = UDF_SB(sb);
262 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
264 if (!sbi->s_partmaps) {
265 udf_err(sb, "Unable to allocate space for %d partition maps\n",
267 sbi->s_partitions = 0;
271 sbi->s_partitions = count;
275 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
278 int nr_groups = bitmap->s_nr_groups;
279 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
282 for (i = 0; i < nr_groups; i++)
283 if (bitmap->s_block_bitmap[i])
284 brelse(bitmap->s_block_bitmap[i]);
286 if (size <= PAGE_SIZE)
292 static void udf_free_partition(struct udf_part_map *map)
295 struct udf_meta_data *mdata;
297 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
298 iput(map->s_uspace.s_table);
299 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
300 iput(map->s_fspace.s_table);
301 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
302 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
303 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
304 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
305 if (map->s_partition_type == UDF_SPARABLE_MAP15)
306 for (i = 0; i < 4; i++)
307 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
308 else if (map->s_partition_type == UDF_METADATA_MAP25) {
309 mdata = &map->s_type_specific.s_metadata;
310 iput(mdata->s_metadata_fe);
311 mdata->s_metadata_fe = NULL;
313 iput(mdata->s_mirror_fe);
314 mdata->s_mirror_fe = NULL;
316 iput(mdata->s_bitmap_fe);
317 mdata->s_bitmap_fe = NULL;
321 static void udf_sb_free_partitions(struct super_block *sb)
323 struct udf_sb_info *sbi = UDF_SB(sb);
325 if (sbi->s_partmaps == NULL)
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=%u", 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];
508 token = match_token(p, tokens, args);
514 if (match_int(&args[0], &option))
516 uopt->blocksize = option;
517 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
520 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
523 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
526 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
529 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
532 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
535 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
538 if (match_int(args, &option))
540 uopt->gid = make_kgid(current_user_ns(), option);
541 if (!gid_valid(uopt->gid))
543 uopt->flags |= (1 << UDF_FLAG_GID_SET);
546 if (match_int(args, &option))
548 uopt->uid = make_kuid(current_user_ns(), option);
549 if (!uid_valid(uopt->uid))
551 uopt->flags |= (1 << UDF_FLAG_UID_SET);
554 if (match_octal(args, &option))
556 uopt->umask = option;
559 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
562 if (match_int(args, &option))
564 uopt->session = option;
566 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
569 if (match_int(args, &option))
571 uopt->lastblock = option;
573 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
576 if (match_int(args, &option))
578 uopt->anchor = option;
581 if (match_int(args, &option))
583 uopt->volume = option;
586 if (match_int(args, &option))
588 uopt->partition = option;
591 if (match_int(args, &option))
593 uopt->fileset = option;
596 if (match_int(args, &option))
598 uopt->rootdir = option;
601 uopt->flags |= (1 << UDF_FLAG_UTF8);
603 #ifdef CONFIG_UDF_NLS
605 uopt->nls_map = load_nls(args[0].from);
606 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
610 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
613 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
616 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
619 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
622 if (match_octal(args, &option))
624 uopt->fmode = option & 0777;
627 if (match_octal(args, &option))
629 uopt->dmode = option & 0777;
632 pr_err("bad mount option \"%s\" or missing value\n", p);
639 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
641 struct udf_options uopt;
642 struct udf_sb_info *sbi = UDF_SB(sb);
644 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
647 int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
648 if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY))
652 uopt.flags = sbi->s_flags;
653 uopt.uid = sbi->s_uid;
654 uopt.gid = sbi->s_gid;
655 uopt.umask = sbi->s_umask;
656 uopt.fmode = sbi->s_fmode;
657 uopt.dmode = sbi->s_dmode;
659 if (!udf_parse_options(options, &uopt, true))
662 write_lock(&sbi->s_cred_lock);
663 sbi->s_flags = uopt.flags;
664 sbi->s_uid = uopt.uid;
665 sbi->s_gid = uopt.gid;
666 sbi->s_umask = uopt.umask;
667 sbi->s_fmode = uopt.fmode;
668 sbi->s_dmode = uopt.dmode;
669 write_unlock(&sbi->s_cred_lock);
671 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
674 if (*flags & MS_RDONLY)
683 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
684 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
685 static loff_t udf_check_vsd(struct super_block *sb)
687 struct volStructDesc *vsd = NULL;
688 loff_t sector = 32768;
690 struct buffer_head *bh = NULL;
693 struct udf_sb_info *sbi;
696 if (sb->s_blocksize < sizeof(struct volStructDesc))
697 sectorsize = sizeof(struct volStructDesc);
699 sectorsize = sb->s_blocksize;
701 sector += (sbi->s_session << sb->s_blocksize_bits);
703 udf_debug("Starting at sector %u (%ld byte sectors)\n",
704 (unsigned int)(sector >> sb->s_blocksize_bits),
706 /* Process the sequence (if applicable) */
707 for (; !nsr02 && !nsr03; sector += sectorsize) {
709 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
713 /* Look for ISO descriptors */
714 vsd = (struct volStructDesc *)(bh->b_data +
715 (sector & (sb->s_blocksize - 1)));
717 if (vsd->stdIdent[0] == 0) {
720 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
722 switch (vsd->structType) {
724 udf_debug("ISO9660 Boot Record found\n");
727 udf_debug("ISO9660 Primary Volume Descriptor found\n");
730 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
733 udf_debug("ISO9660 Volume Partition Descriptor found\n");
736 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
739 udf_debug("ISO9660 VRS (%u) found\n",
743 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
746 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
750 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
753 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
763 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
769 static int udf_find_fileset(struct super_block *sb,
770 struct kernel_lb_addr *fileset,
771 struct kernel_lb_addr *root)
773 struct buffer_head *bh = NULL;
776 struct udf_sb_info *sbi;
778 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
779 fileset->partitionReferenceNum != 0xFFFF) {
780 bh = udf_read_ptagged(sb, fileset, 0, &ident);
784 } else if (ident != TAG_IDENT_FSD) {
793 /* Search backwards through the partitions */
794 struct kernel_lb_addr newfileset;
796 /* --> cvg: FIXME - is it reasonable? */
799 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
800 (newfileset.partitionReferenceNum != 0xFFFF &&
801 fileset->logicalBlockNum == 0xFFFFFFFF &&
802 fileset->partitionReferenceNum == 0xFFFF);
803 newfileset.partitionReferenceNum--) {
804 lastblock = sbi->s_partmaps
805 [newfileset.partitionReferenceNum]
807 newfileset.logicalBlockNum = 0;
810 bh = udf_read_ptagged(sb, &newfileset, 0,
813 newfileset.logicalBlockNum++;
820 struct spaceBitmapDesc *sp;
821 sp = (struct spaceBitmapDesc *)
823 newfileset.logicalBlockNum += 1 +
824 ((le32_to_cpu(sp->numOfBytes) +
825 sizeof(struct spaceBitmapDesc)
826 - 1) >> sb->s_blocksize_bits);
831 *fileset = newfileset;
834 newfileset.logicalBlockNum++;
839 } while (newfileset.logicalBlockNum < lastblock &&
840 fileset->logicalBlockNum == 0xFFFFFFFF &&
841 fileset->partitionReferenceNum == 0xFFFF);
845 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
846 fileset->partitionReferenceNum != 0xFFFF) && bh) {
847 udf_debug("Fileset at block=%d, partition=%d\n",
848 fileset->logicalBlockNum,
849 fileset->partitionReferenceNum);
851 sbi->s_partition = fileset->partitionReferenceNum;
852 udf_load_fileset(sb, bh, root);
860 * Load primary Volume Descriptor Sequence
862 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
865 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
867 struct primaryVolDesc *pvoldesc;
868 struct ustr *instr, *outstr;
869 struct buffer_head *bh;
873 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
877 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
881 bh = udf_read_tagged(sb, block, block, &ident);
887 if (ident != TAG_IDENT_PVD) {
892 pvoldesc = (struct primaryVolDesc *)bh->b_data;
894 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
895 pvoldesc->recordingDateAndTime)) {
897 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
898 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
899 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
900 ts->minute, le16_to_cpu(ts->typeAndTimezone));
904 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
905 if (udf_CS0toUTF8(outstr, instr)) {
906 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
907 outstr->u_len > 31 ? 31 : outstr->u_len);
908 udf_debug("volIdent[] = '%s'\n",
909 UDF_SB(sb)->s_volume_ident);
912 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
913 if (udf_CS0toUTF8(outstr, instr))
914 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
926 struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
927 u32 meta_file_loc, u32 partition_num)
929 struct kernel_lb_addr addr;
930 struct inode *metadata_fe;
932 addr.logicalBlockNum = meta_file_loc;
933 addr.partitionReferenceNum = partition_num;
935 metadata_fe = udf_iget(sb, &addr);
937 if (metadata_fe == NULL)
938 udf_warn(sb, "metadata inode efe not found\n");
939 else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
940 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
948 static int udf_load_metadata_files(struct super_block *sb, int partition)
950 struct udf_sb_info *sbi = UDF_SB(sb);
951 struct udf_part_map *map;
952 struct udf_meta_data *mdata;
953 struct kernel_lb_addr addr;
955 map = &sbi->s_partmaps[partition];
956 mdata = &map->s_type_specific.s_metadata;
958 /* metadata address */
959 udf_debug("Metadata file location: block = %d part = %d\n",
960 mdata->s_meta_file_loc, map->s_partition_num);
962 mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb,
963 mdata->s_meta_file_loc, map->s_partition_num);
965 if (mdata->s_metadata_fe == NULL) {
966 /* mirror file entry */
967 udf_debug("Mirror metadata file location: block = %d part = %d\n",
968 mdata->s_mirror_file_loc, map->s_partition_num);
970 mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
971 mdata->s_mirror_file_loc, map->s_partition_num);
973 if (mdata->s_mirror_fe == NULL) {
974 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
982 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
984 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
985 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
986 addr.partitionReferenceNum = map->s_partition_num;
988 udf_debug("Bitmap file location: block = %d part = %d\n",
989 addr.logicalBlockNum, addr.partitionReferenceNum);
991 mdata->s_bitmap_fe = udf_iget(sb, &addr);
992 if (mdata->s_bitmap_fe == NULL) {
993 if (sb->s_flags & MS_RDONLY)
994 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
996 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
1002 udf_debug("udf_load_metadata_files Ok\n");
1006 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
1007 struct kernel_lb_addr *root)
1009 struct fileSetDesc *fset;
1011 fset = (struct fileSetDesc *)bh->b_data;
1013 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1015 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1017 udf_debug("Rootdir at block=%d, partition=%d\n",
1018 root->logicalBlockNum, root->partitionReferenceNum);
1021 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1023 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
1024 return DIV_ROUND_UP(map->s_partition_len +
1025 (sizeof(struct spaceBitmapDesc) << 3),
1026 sb->s_blocksize * 8);
1029 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1031 struct udf_bitmap *bitmap;
1035 nr_groups = udf_compute_nr_groups(sb, index);
1036 size = sizeof(struct udf_bitmap) +
1037 (sizeof(struct buffer_head *) * nr_groups);
1039 if (size <= PAGE_SIZE)
1040 bitmap = kzalloc(size, GFP_KERNEL);
1042 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
1047 bitmap->s_nr_groups = nr_groups;
1051 static int udf_fill_partdesc_info(struct super_block *sb,
1052 struct partitionDesc *p, int p_index)
1054 struct udf_part_map *map;
1055 struct udf_sb_info *sbi = UDF_SB(sb);
1056 struct partitionHeaderDesc *phd;
1058 map = &sbi->s_partmaps[p_index];
1060 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1061 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1063 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1064 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1065 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1066 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1067 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1068 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1069 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1070 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1072 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1073 p_index, map->s_partition_type,
1074 map->s_partition_root, map->s_partition_len);
1076 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1077 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1080 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1081 if (phd->unallocSpaceTable.extLength) {
1082 struct kernel_lb_addr loc = {
1083 .logicalBlockNum = le32_to_cpu(
1084 phd->unallocSpaceTable.extPosition),
1085 .partitionReferenceNum = p_index,
1088 map->s_uspace.s_table = udf_iget(sb, &loc);
1089 if (!map->s_uspace.s_table) {
1090 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1094 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1095 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1096 p_index, map->s_uspace.s_table->i_ino);
1099 if (phd->unallocSpaceBitmap.extLength) {
1100 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1103 map->s_uspace.s_bitmap = bitmap;
1104 bitmap->s_extPosition = le32_to_cpu(
1105 phd->unallocSpaceBitmap.extPosition);
1106 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1107 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1108 p_index, bitmap->s_extPosition);
1111 if (phd->partitionIntegrityTable.extLength)
1112 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1114 if (phd->freedSpaceTable.extLength) {
1115 struct kernel_lb_addr loc = {
1116 .logicalBlockNum = le32_to_cpu(
1117 phd->freedSpaceTable.extPosition),
1118 .partitionReferenceNum = p_index,
1121 map->s_fspace.s_table = udf_iget(sb, &loc);
1122 if (!map->s_fspace.s_table) {
1123 udf_debug("cannot load freedSpaceTable (part %d)\n",
1128 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1129 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1130 p_index, map->s_fspace.s_table->i_ino);
1133 if (phd->freedSpaceBitmap.extLength) {
1134 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1137 map->s_fspace.s_bitmap = bitmap;
1138 bitmap->s_extPosition = le32_to_cpu(
1139 phd->freedSpaceBitmap.extPosition);
1140 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1141 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1142 p_index, bitmap->s_extPosition);
1147 static void udf_find_vat_block(struct super_block *sb, int p_index,
1148 int type1_index, sector_t start_block)
1150 struct udf_sb_info *sbi = UDF_SB(sb);
1151 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1153 struct kernel_lb_addr ino;
1156 * VAT file entry is in the last recorded block. Some broken disks have
1157 * it a few blocks before so try a bit harder...
1159 ino.partitionReferenceNum = type1_index;
1160 for (vat_block = start_block;
1161 vat_block >= map->s_partition_root &&
1162 vat_block >= start_block - 3 &&
1163 !sbi->s_vat_inode; vat_block--) {
1164 ino.logicalBlockNum = vat_block - map->s_partition_root;
1165 sbi->s_vat_inode = udf_iget(sb, &ino);
1169 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1171 struct udf_sb_info *sbi = UDF_SB(sb);
1172 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1173 struct buffer_head *bh = NULL;
1174 struct udf_inode_info *vati;
1176 struct virtualAllocationTable20 *vat20;
1177 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
1179 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
1180 if (!sbi->s_vat_inode &&
1181 sbi->s_last_block != blocks - 1) {
1182 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1183 (unsigned long)sbi->s_last_block,
1184 (unsigned long)blocks - 1);
1185 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
1187 if (!sbi->s_vat_inode)
1190 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1191 map->s_type_specific.s_virtual.s_start_offset = 0;
1192 map->s_type_specific.s_virtual.s_num_entries =
1193 (sbi->s_vat_inode->i_size - 36) >> 2;
1194 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1195 vati = UDF_I(sbi->s_vat_inode);
1196 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1197 pos = udf_block_map(sbi->s_vat_inode, 0);
1198 bh = sb_bread(sb, pos);
1201 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1203 vat20 = (struct virtualAllocationTable20 *)
1207 map->s_type_specific.s_virtual.s_start_offset =
1208 le16_to_cpu(vat20->lengthHeader);
1209 map->s_type_specific.s_virtual.s_num_entries =
1210 (sbi->s_vat_inode->i_size -
1211 map->s_type_specific.s_virtual.
1212 s_start_offset) >> 2;
1219 * Load partition descriptor block
1221 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1224 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1226 struct buffer_head *bh;
1227 struct partitionDesc *p;
1228 struct udf_part_map *map;
1229 struct udf_sb_info *sbi = UDF_SB(sb);
1231 uint16_t partitionNumber;
1235 bh = udf_read_tagged(sb, block, block, &ident);
1238 if (ident != TAG_IDENT_PD) {
1243 p = (struct partitionDesc *)bh->b_data;
1244 partitionNumber = le16_to_cpu(p->partitionNumber);
1246 /* First scan for TYPE1, SPARABLE and METADATA partitions */
1247 for (i = 0; i < sbi->s_partitions; i++) {
1248 map = &sbi->s_partmaps[i];
1249 udf_debug("Searching map: (%d == %d)\n",
1250 map->s_partition_num, partitionNumber);
1251 if (map->s_partition_num == partitionNumber &&
1252 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1253 map->s_partition_type == UDF_SPARABLE_MAP15))
1257 if (i >= sbi->s_partitions) {
1258 udf_debug("Partition (%d) not found in partition map\n",
1264 ret = udf_fill_partdesc_info(sb, p, i);
1269 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1270 * PHYSICAL partitions are already set up
1273 for (i = 0; i < sbi->s_partitions; i++) {
1274 map = &sbi->s_partmaps[i];
1276 if (map->s_partition_num == partitionNumber &&
1277 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1278 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1279 map->s_partition_type == UDF_METADATA_MAP25))
1283 if (i >= sbi->s_partitions) {
1288 ret = udf_fill_partdesc_info(sb, p, i);
1292 if (map->s_partition_type == UDF_METADATA_MAP25) {
1293 ret = udf_load_metadata_files(sb, i);
1295 udf_err(sb, "error loading MetaData partition map %d\n",
1301 * If we have a partition with virtual map, we don't handle
1302 * writing to it (we overwrite blocks instead of relocating
1305 if (!(sb->s_flags & MS_RDONLY)) {
1309 ret = udf_load_vat(sb, i, type1_idx);
1315 /* In case loading failed, we handle cleanup in udf_fill_super */
1320 static int udf_load_sparable_map(struct super_block *sb,
1321 struct udf_part_map *map,
1322 struct sparablePartitionMap *spm)
1326 struct sparingTable *st;
1327 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1329 struct buffer_head *bh;
1331 map->s_partition_type = UDF_SPARABLE_MAP15;
1332 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1333 if (!is_power_of_2(sdata->s_packet_len)) {
1334 udf_err(sb, "error loading logical volume descriptor: "
1335 "Invalid packet length %u\n",
1336 (unsigned)sdata->s_packet_len);
1339 if (spm->numSparingTables > 4) {
1340 udf_err(sb, "error loading logical volume descriptor: "
1341 "Too many sparing tables (%d)\n",
1342 (int)spm->numSparingTables);
1346 for (i = 0; i < spm->numSparingTables; i++) {
1347 loc = le32_to_cpu(spm->locSparingTable[i]);
1348 bh = udf_read_tagged(sb, loc, loc, &ident);
1352 st = (struct sparingTable *)bh->b_data;
1354 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1355 strlen(UDF_ID_SPARING)) ||
1356 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1362 sdata->s_spar_map[i] = bh;
1364 map->s_partition_func = udf_get_pblock_spar15;
1368 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1369 struct kernel_lb_addr *fileset)
1371 struct logicalVolDesc *lvd;
1374 struct udf_sb_info *sbi = UDF_SB(sb);
1375 struct genericPartitionMap *gpm;
1377 struct buffer_head *bh;
1378 unsigned int table_len;
1381 bh = udf_read_tagged(sb, block, block, &ident);
1384 BUG_ON(ident != TAG_IDENT_LVD);
1385 lvd = (struct logicalVolDesc *)bh->b_data;
1386 table_len = le32_to_cpu(lvd->mapTableLength);
1387 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
1388 udf_err(sb, "error loading logical volume descriptor: "
1389 "Partition table too long (%u > %lu)\n", table_len,
1390 sb->s_blocksize - sizeof(*lvd));
1395 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1399 for (i = 0, offset = 0;
1400 i < sbi->s_partitions && offset < table_len;
1401 i++, offset += gpm->partitionMapLength) {
1402 struct udf_part_map *map = &sbi->s_partmaps[i];
1403 gpm = (struct genericPartitionMap *)
1404 &(lvd->partitionMaps[offset]);
1405 type = gpm->partitionMapType;
1407 struct genericPartitionMap1 *gpm1 =
1408 (struct genericPartitionMap1 *)gpm;
1409 map->s_partition_type = UDF_TYPE1_MAP15;
1410 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1411 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1412 map->s_partition_func = NULL;
1413 } else if (type == 2) {
1414 struct udfPartitionMap2 *upm2 =
1415 (struct udfPartitionMap2 *)gpm;
1416 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1417 strlen(UDF_ID_VIRTUAL))) {
1419 le16_to_cpu(((__le16 *)upm2->partIdent.
1422 map->s_partition_type =
1424 map->s_partition_func =
1425 udf_get_pblock_virt15;
1427 map->s_partition_type =
1429 map->s_partition_func =
1430 udf_get_pblock_virt20;
1432 } else if (!strncmp(upm2->partIdent.ident,
1434 strlen(UDF_ID_SPARABLE))) {
1435 ret = udf_load_sparable_map(sb, map,
1436 (struct sparablePartitionMap *)gpm);
1439 } else if (!strncmp(upm2->partIdent.ident,
1441 strlen(UDF_ID_METADATA))) {
1442 struct udf_meta_data *mdata =
1443 &map->s_type_specific.s_metadata;
1444 struct metadataPartitionMap *mdm =
1445 (struct metadataPartitionMap *)
1446 &(lvd->partitionMaps[offset]);
1447 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1448 i, type, UDF_ID_METADATA);
1450 map->s_partition_type = UDF_METADATA_MAP25;
1451 map->s_partition_func = udf_get_pblock_meta25;
1453 mdata->s_meta_file_loc =
1454 le32_to_cpu(mdm->metadataFileLoc);
1455 mdata->s_mirror_file_loc =
1456 le32_to_cpu(mdm->metadataMirrorFileLoc);
1457 mdata->s_bitmap_file_loc =
1458 le32_to_cpu(mdm->metadataBitmapFileLoc);
1459 mdata->s_alloc_unit_size =
1460 le32_to_cpu(mdm->allocUnitSize);
1461 mdata->s_align_unit_size =
1462 le16_to_cpu(mdm->alignUnitSize);
1463 if (mdm->flags & 0x01)
1464 mdata->s_flags |= MF_DUPLICATE_MD;
1466 udf_debug("Metadata Ident suffix=0x%x\n",
1467 le16_to_cpu(*(__le16 *)
1468 mdm->partIdent.identSuffix));
1469 udf_debug("Metadata part num=%d\n",
1470 le16_to_cpu(mdm->partitionNum));
1471 udf_debug("Metadata part alloc unit size=%d\n",
1472 le32_to_cpu(mdm->allocUnitSize));
1473 udf_debug("Metadata file loc=%d\n",
1474 le32_to_cpu(mdm->metadataFileLoc));
1475 udf_debug("Mirror file loc=%d\n",
1476 le32_to_cpu(mdm->metadataMirrorFileLoc));
1477 udf_debug("Bitmap file loc=%d\n",
1478 le32_to_cpu(mdm->metadataBitmapFileLoc));
1479 udf_debug("Flags: %d %d\n",
1480 mdata->s_flags, mdm->flags);
1482 udf_debug("Unknown ident: %s\n",
1483 upm2->partIdent.ident);
1486 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1487 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1489 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1490 i, map->s_partition_num, type, map->s_volumeseqnum);
1494 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1496 *fileset = lelb_to_cpu(la->extLocation);
1497 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1498 fileset->logicalBlockNum,
1499 fileset->partitionReferenceNum);
1501 if (lvd->integritySeqExt.extLength)
1502 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1510 * udf_load_logicalvolint
1513 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1515 struct buffer_head *bh = NULL;
1517 struct udf_sb_info *sbi = UDF_SB(sb);
1518 struct logicalVolIntegrityDesc *lvid;
1520 while (loc.extLength > 0 &&
1521 (bh = udf_read_tagged(sb, loc.extLocation,
1522 loc.extLocation, &ident)) &&
1523 ident == TAG_IDENT_LVID) {
1524 sbi->s_lvid_bh = bh;
1525 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1527 if (lvid->nextIntegrityExt.extLength)
1528 udf_load_logicalvolint(sb,
1529 leea_to_cpu(lvid->nextIntegrityExt));
1531 if (sbi->s_lvid_bh != bh)
1533 loc.extLength -= sb->s_blocksize;
1536 if (sbi->s_lvid_bh != bh)
1541 * Process a main/reserve volume descriptor sequence.
1542 * @block First block of first extent of the sequence.
1543 * @lastblock Lastblock of first extent of the sequence.
1544 * @fileset There we store extent containing root fileset
1546 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1549 static noinline int udf_process_sequence(
1550 struct super_block *sb,
1551 sector_t block, sector_t lastblock,
1552 struct kernel_lb_addr *fileset)
1554 struct buffer_head *bh = NULL;
1555 struct udf_vds_record vds[VDS_POS_LENGTH];
1556 struct udf_vds_record *curr;
1557 struct generic_desc *gd;
1558 struct volDescPtr *vdp;
1562 long next_s = 0, next_e = 0;
1565 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1568 * Read the main descriptor sequence and find which descriptors
1571 for (; (!done && block <= lastblock); block++) {
1573 bh = udf_read_tagged(sb, block, block, &ident);
1576 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1577 (unsigned long long)block);
1581 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1582 gd = (struct generic_desc *)bh->b_data;
1583 vdsn = le32_to_cpu(gd->volDescSeqNum);
1585 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1586 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1587 if (vdsn >= curr->volDescSeqNum) {
1588 curr->volDescSeqNum = vdsn;
1589 curr->block = block;
1592 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1593 curr = &vds[VDS_POS_VOL_DESC_PTR];
1594 if (vdsn >= curr->volDescSeqNum) {
1595 curr->volDescSeqNum = vdsn;
1596 curr->block = block;
1598 vdp = (struct volDescPtr *)bh->b_data;
1599 next_s = le32_to_cpu(
1600 vdp->nextVolDescSeqExt.extLocation);
1601 next_e = le32_to_cpu(
1602 vdp->nextVolDescSeqExt.extLength);
1603 next_e = next_e >> sb->s_blocksize_bits;
1607 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1608 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1609 if (vdsn >= curr->volDescSeqNum) {
1610 curr->volDescSeqNum = vdsn;
1611 curr->block = block;
1614 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1615 curr = &vds[VDS_POS_PARTITION_DESC];
1617 curr->block = block;
1619 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1620 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1621 if (vdsn >= curr->volDescSeqNum) {
1622 curr->volDescSeqNum = vdsn;
1623 curr->block = block;
1626 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1627 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1628 if (vdsn >= curr->volDescSeqNum) {
1629 curr->volDescSeqNum = vdsn;
1630 curr->block = block;
1633 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1634 vds[VDS_POS_TERMINATING_DESC].block = block;
1638 next_s = next_e = 0;
1646 * Now read interesting descriptors again and process them
1647 * in a suitable order
1649 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1650 udf_err(sb, "Primary Volume Descriptor not found!\n");
1653 ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
1657 if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1658 ret = udf_load_logicalvol(sb,
1659 vds[VDS_POS_LOGICAL_VOL_DESC].block,
1665 if (vds[VDS_POS_PARTITION_DESC].block) {
1667 * We rescan the whole descriptor sequence to find
1668 * partition descriptor blocks and process them.
1670 for (block = vds[VDS_POS_PARTITION_DESC].block;
1671 block < vds[VDS_POS_TERMINATING_DESC].block;
1673 ret = udf_load_partdesc(sb, block);
1683 * Load Volume Descriptor Sequence described by anchor in bh
1685 * Returns <0 on error, 0 on success
1687 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1688 struct kernel_lb_addr *fileset)
1690 struct anchorVolDescPtr *anchor;
1691 sector_t main_s, main_e, reserve_s, reserve_e;
1694 anchor = (struct anchorVolDescPtr *)bh->b_data;
1696 /* Locate the main sequence */
1697 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1698 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1699 main_e = main_e >> sb->s_blocksize_bits;
1702 /* Locate the reserve sequence */
1703 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1704 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1705 reserve_e = reserve_e >> sb->s_blocksize_bits;
1706 reserve_e += reserve_s;
1708 /* Process the main & reserve sequences */
1709 /* responsible for finding the PartitionDesc(s) */
1710 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1713 udf_sb_free_partitions(sb);
1714 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1716 udf_sb_free_partitions(sb);
1717 /* No sequence was OK, return -EIO */
1725 * Check whether there is an anchor block in the given block and
1726 * load Volume Descriptor Sequence if so.
1728 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1731 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1732 struct kernel_lb_addr *fileset)
1734 struct buffer_head *bh;
1738 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1739 udf_fixed_to_variable(block) >=
1740 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1743 bh = udf_read_tagged(sb, block, block, &ident);
1746 if (ident != TAG_IDENT_AVDP) {
1750 ret = udf_load_sequence(sb, bh, fileset);
1756 * Search for an anchor volume descriptor pointer.
1758 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1761 static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1762 struct kernel_lb_addr *fileset)
1766 struct udf_sb_info *sbi = UDF_SB(sb);
1770 /* First try user provided anchor */
1771 if (sbi->s_anchor) {
1772 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1777 * according to spec, anchor is in either:
1781 * however, if the disc isn't closed, it could be 512.
1783 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1787 * The trouble is which block is the last one. Drives often misreport
1788 * this so we try various possibilities.
1790 last[last_count++] = *lastblock;
1791 if (*lastblock >= 1)
1792 last[last_count++] = *lastblock - 1;
1793 last[last_count++] = *lastblock + 1;
1794 if (*lastblock >= 2)
1795 last[last_count++] = *lastblock - 2;
1796 if (*lastblock >= 150)
1797 last[last_count++] = *lastblock - 150;
1798 if (*lastblock >= 152)
1799 last[last_count++] = *lastblock - 152;
1801 for (i = 0; i < last_count; i++) {
1802 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1803 sb->s_blocksize_bits)
1805 ret = udf_check_anchor_block(sb, last[i], fileset);
1806 if (ret != -EAGAIN) {
1808 *lastblock = last[i];
1813 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1814 if (ret != -EAGAIN) {
1816 *lastblock = last[i];
1821 /* Finally try block 512 in case media is open */
1822 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
1826 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1827 * area specified by it. The function expects sbi->s_lastblock to be the last
1828 * block on the media.
1830 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1833 static int udf_find_anchor(struct super_block *sb,
1834 struct kernel_lb_addr *fileset)
1836 struct udf_sb_info *sbi = UDF_SB(sb);
1837 sector_t lastblock = sbi->s_last_block;
1840 ret = udf_scan_anchors(sb, &lastblock, fileset);
1844 /* No anchor found? Try VARCONV conversion of block numbers */
1845 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1846 lastblock = udf_variable_to_fixed(sbi->s_last_block);
1847 /* Firstly, we try to not convert number of the last block */
1848 ret = udf_scan_anchors(sb, &lastblock, fileset);
1852 lastblock = sbi->s_last_block;
1853 /* Secondly, we try with converted number of the last block */
1854 ret = udf_scan_anchors(sb, &lastblock, fileset);
1856 /* VARCONV didn't help. Clear it. */
1857 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1861 sbi->s_last_block = lastblock;
1866 * Check Volume Structure Descriptor, find Anchor block and load Volume
1867 * Descriptor Sequence.
1869 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1870 * block was not found.
1872 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1873 int silent, struct kernel_lb_addr *fileset)
1875 struct udf_sb_info *sbi = UDF_SB(sb);
1879 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1881 udf_warn(sb, "Bad block size\n");
1884 sbi->s_last_block = uopt->lastblock;
1886 /* Check that it is NSR02 compliant */
1887 nsr_off = udf_check_vsd(sb);
1890 udf_warn(sb, "No VRS found\n");
1894 udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n");
1895 if (!sbi->s_last_block)
1896 sbi->s_last_block = udf_get_last_block(sb);
1898 udf_debug("Validity check skipped because of novrs option\n");
1901 /* Look for anchor block and load Volume Descriptor Sequence */
1902 sbi->s_anchor = uopt->anchor;
1903 ret = udf_find_anchor(sb, fileset);
1905 if (!silent && ret == -EAGAIN)
1906 udf_warn(sb, "No anchor found\n");
1912 static void udf_open_lvid(struct super_block *sb)
1914 struct udf_sb_info *sbi = UDF_SB(sb);
1915 struct buffer_head *bh = sbi->s_lvid_bh;
1916 struct logicalVolIntegrityDesc *lvid;
1917 struct logicalVolIntegrityDescImpUse *lvidiu;
1921 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1922 lvidiu = udf_sb_lvidiu(sb);
1926 mutex_lock(&sbi->s_alloc_mutex);
1927 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1928 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1929 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1931 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
1933 lvid->descTag.descCRC = cpu_to_le16(
1934 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1935 le16_to_cpu(lvid->descTag.descCRCLength)));
1937 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1938 mark_buffer_dirty(bh);
1939 sbi->s_lvid_dirty = 0;
1940 mutex_unlock(&sbi->s_alloc_mutex);
1941 /* Make opening of filesystem visible on the media immediately */
1942 sync_dirty_buffer(bh);
1945 static void udf_close_lvid(struct super_block *sb)
1947 struct udf_sb_info *sbi = UDF_SB(sb);
1948 struct buffer_head *bh = sbi->s_lvid_bh;
1949 struct logicalVolIntegrityDesc *lvid;
1950 struct logicalVolIntegrityDescImpUse *lvidiu;
1954 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1955 lvidiu = udf_sb_lvidiu(sb);
1959 mutex_lock(&sbi->s_alloc_mutex);
1960 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1961 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1962 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1963 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1964 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1965 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1966 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1967 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1968 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1969 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1971 lvid->descTag.descCRC = cpu_to_le16(
1972 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1973 le16_to_cpu(lvid->descTag.descCRCLength)));
1975 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1977 * We set buffer uptodate unconditionally here to avoid spurious
1978 * warnings from mark_buffer_dirty() when previous EIO has marked
1979 * the buffer as !uptodate
1981 set_buffer_uptodate(bh);
1982 mark_buffer_dirty(bh);
1983 sbi->s_lvid_dirty = 0;
1984 mutex_unlock(&sbi->s_alloc_mutex);
1985 /* Make closing of filesystem visible on the media immediately */
1986 sync_dirty_buffer(bh);
1989 u64 lvid_get_unique_id(struct super_block *sb)
1991 struct buffer_head *bh;
1992 struct udf_sb_info *sbi = UDF_SB(sb);
1993 struct logicalVolIntegrityDesc *lvid;
1994 struct logicalVolHeaderDesc *lvhd;
1998 bh = sbi->s_lvid_bh;
2002 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2003 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2005 mutex_lock(&sbi->s_alloc_mutex);
2006 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2007 if (!(++uniqueID & 0xFFFFFFFF))
2009 lvhd->uniqueID = cpu_to_le64(uniqueID);
2010 mutex_unlock(&sbi->s_alloc_mutex);
2011 mark_buffer_dirty(bh);
2016 static int udf_fill_super(struct super_block *sb, void *options, int silent)
2019 struct inode *inode = NULL;
2020 struct udf_options uopt;
2021 struct kernel_lb_addr rootdir, fileset;
2022 struct udf_sb_info *sbi;
2024 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
2025 uopt.uid = INVALID_UID;
2026 uopt.gid = INVALID_GID;
2028 uopt.fmode = UDF_INVALID_MODE;
2029 uopt.dmode = UDF_INVALID_MODE;
2031 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
2035 sb->s_fs_info = sbi;
2037 mutex_init(&sbi->s_alloc_mutex);
2039 if (!udf_parse_options((char *)options, &uopt, false))
2042 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
2043 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
2044 udf_err(sb, "utf8 cannot be combined with iocharset\n");
2047 #ifdef CONFIG_UDF_NLS
2048 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
2049 uopt.nls_map = load_nls_default();
2051 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2053 udf_debug("Using default NLS map\n");
2056 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2057 uopt.flags |= (1 << UDF_FLAG_UTF8);
2059 fileset.logicalBlockNum = 0xFFFFFFFF;
2060 fileset.partitionReferenceNum = 0xFFFF;
2062 sbi->s_flags = uopt.flags;
2063 sbi->s_uid = uopt.uid;
2064 sbi->s_gid = uopt.gid;
2065 sbi->s_umask = uopt.umask;
2066 sbi->s_fmode = uopt.fmode;
2067 sbi->s_dmode = uopt.dmode;
2068 sbi->s_nls_map = uopt.nls_map;
2069 rwlock_init(&sbi->s_cred_lock);
2071 if (uopt.session == 0xFFFFFFFF)
2072 sbi->s_session = udf_get_last_session(sb);
2074 sbi->s_session = uopt.session;
2076 udf_debug("Multi-session=%d\n", sbi->s_session);
2078 /* Fill in the rest of the superblock */
2079 sb->s_op = &udf_sb_ops;
2080 sb->s_export_op = &udf_export_ops;
2082 sb->s_magic = UDF_SUPER_MAGIC;
2083 sb->s_time_gran = 1000;
2085 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
2086 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2088 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
2089 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2090 if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
2092 pr_notice("Rescanning with blocksize %d\n",
2093 UDF_DEFAULT_BLOCKSIZE);
2094 brelse(sbi->s_lvid_bh);
2095 sbi->s_lvid_bh = NULL;
2096 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
2097 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2101 if (ret == -EAGAIN) {
2102 udf_warn(sb, "No partition found (1)\n");
2108 udf_debug("Lastblock=%d\n", sbi->s_last_block);
2110 if (sbi->s_lvid_bh) {
2111 struct logicalVolIntegrityDescImpUse *lvidiu =
2113 uint16_t minUDFReadRev;
2114 uint16_t minUDFWriteRev;
2120 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2121 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
2122 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
2123 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
2125 UDF_MAX_READ_VERSION);
2128 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2129 !(sb->s_flags & MS_RDONLY)) {
2134 sbi->s_udfrev = minUDFWriteRev;
2136 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2137 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2138 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2139 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2142 if (!sbi->s_partitions) {
2143 udf_warn(sb, "No partition found (2)\n");
2148 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2149 UDF_PART_FLAG_READ_ONLY &&
2150 !(sb->s_flags & MS_RDONLY)) {
2155 if (udf_find_fileset(sb, &fileset, &rootdir)) {
2156 udf_warn(sb, "No fileset found\n");
2162 struct timestamp ts;
2163 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2164 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2165 sbi->s_volume_ident,
2166 le16_to_cpu(ts.year), ts.month, ts.day,
2167 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2169 if (!(sb->s_flags & MS_RDONLY))
2172 /* Assign the root inode */
2173 /* assign inodes by physical block number */
2174 /* perhaps it's not extensible enough, but for now ... */
2175 inode = udf_iget(sb, &rootdir);
2177 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
2178 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2183 /* Allocate a dentry for the root inode */
2184 sb->s_root = d_make_root(inode);
2186 udf_err(sb, "Couldn't allocate root dentry\n");
2190 sb->s_maxbytes = MAX_LFS_FILESIZE;
2191 sb->s_max_links = UDF_MAX_LINKS;
2195 if (sbi->s_vat_inode)
2196 iput(sbi->s_vat_inode);
2197 #ifdef CONFIG_UDF_NLS
2198 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2199 unload_nls(sbi->s_nls_map);
2201 if (!(sb->s_flags & MS_RDONLY))
2203 brelse(sbi->s_lvid_bh);
2204 udf_sb_free_partitions(sb);
2206 sb->s_fs_info = NULL;
2211 void _udf_err(struct super_block *sb, const char *function,
2212 const char *fmt, ...)
2214 struct va_format vaf;
2217 va_start(args, fmt);
2222 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2227 void _udf_warn(struct super_block *sb, const char *function,
2228 const char *fmt, ...)
2230 struct va_format vaf;
2233 va_start(args, fmt);
2238 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2243 static void udf_put_super(struct super_block *sb)
2245 struct udf_sb_info *sbi;
2249 if (sbi->s_vat_inode)
2250 iput(sbi->s_vat_inode);
2251 #ifdef CONFIG_UDF_NLS
2252 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2253 unload_nls(sbi->s_nls_map);
2255 if (!(sb->s_flags & MS_RDONLY))
2257 brelse(sbi->s_lvid_bh);
2258 udf_sb_free_partitions(sb);
2259 kfree(sb->s_fs_info);
2260 sb->s_fs_info = NULL;
2263 static int udf_sync_fs(struct super_block *sb, int wait)
2265 struct udf_sb_info *sbi = UDF_SB(sb);
2267 mutex_lock(&sbi->s_alloc_mutex);
2268 if (sbi->s_lvid_dirty) {
2270 * Blockdevice will be synced later so we don't have to submit
2273 mark_buffer_dirty(sbi->s_lvid_bh);
2274 sbi->s_lvid_dirty = 0;
2276 mutex_unlock(&sbi->s_alloc_mutex);
2281 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2283 struct super_block *sb = dentry->d_sb;
2284 struct udf_sb_info *sbi = UDF_SB(sb);
2285 struct logicalVolIntegrityDescImpUse *lvidiu;
2286 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2288 lvidiu = udf_sb_lvidiu(sb);
2289 buf->f_type = UDF_SUPER_MAGIC;
2290 buf->f_bsize = sb->s_blocksize;
2291 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2292 buf->f_bfree = udf_count_free(sb);
2293 buf->f_bavail = buf->f_bfree;
2294 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2295 le32_to_cpu(lvidiu->numDirs)) : 0)
2297 buf->f_ffree = buf->f_bfree;
2298 buf->f_namelen = UDF_NAME_LEN - 2;
2299 buf->f_fsid.val[0] = (u32)id;
2300 buf->f_fsid.val[1] = (u32)(id >> 32);
2305 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2306 struct udf_bitmap *bitmap)
2308 struct buffer_head *bh = NULL;
2309 unsigned int accum = 0;
2311 int block = 0, newblock;
2312 struct kernel_lb_addr loc;
2316 struct spaceBitmapDesc *bm;
2318 loc.logicalBlockNum = bitmap->s_extPosition;
2319 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2320 bh = udf_read_ptagged(sb, &loc, 0, &ident);
2323 udf_err(sb, "udf_count_free failed\n");
2325 } else if (ident != TAG_IDENT_SBD) {
2327 udf_err(sb, "udf_count_free failed\n");
2331 bm = (struct spaceBitmapDesc *)bh->b_data;
2332 bytes = le32_to_cpu(bm->numOfBytes);
2333 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2334 ptr = (uint8_t *)bh->b_data;
2337 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2338 accum += bitmap_weight((const unsigned long *)(ptr + index),
2343 newblock = udf_get_lb_pblock(sb, &loc, ++block);
2344 bh = udf_tread(sb, newblock);
2346 udf_debug("read failed\n");
2350 ptr = (uint8_t *)bh->b_data;
2358 static unsigned int udf_count_free_table(struct super_block *sb,
2359 struct inode *table)
2361 unsigned int accum = 0;
2363 struct kernel_lb_addr eloc;
2365 struct extent_position epos;
2367 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
2368 epos.block = UDF_I(table)->i_location;
2369 epos.offset = sizeof(struct unallocSpaceEntry);
2372 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2373 accum += (elen >> table->i_sb->s_blocksize_bits);
2376 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
2381 static unsigned int udf_count_free(struct super_block *sb)
2383 unsigned int accum = 0;
2384 struct udf_sb_info *sbi;
2385 struct udf_part_map *map;
2388 if (sbi->s_lvid_bh) {
2389 struct logicalVolIntegrityDesc *lvid =
2390 (struct logicalVolIntegrityDesc *)
2391 sbi->s_lvid_bh->b_data;
2392 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2393 accum = le32_to_cpu(
2394 lvid->freeSpaceTable[sbi->s_partition]);
2395 if (accum == 0xFFFFFFFF)
2403 map = &sbi->s_partmaps[sbi->s_partition];
2404 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2405 accum += udf_count_free_bitmap(sb,
2406 map->s_uspace.s_bitmap);
2408 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2409 accum += udf_count_free_bitmap(sb,
2410 map->s_fspace.s_bitmap);
2415 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2416 accum += udf_count_free_table(sb,
2417 map->s_uspace.s_table);
2419 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2420 accum += udf_count_free_table(sb,
2421 map->s_fspace.s_table);