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 UDF_DEFAULT_BLOCKSIZE 2048
78 #define VSD_FIRST_SECTOR_OFFSET 32768
79 #define VSD_MAX_SECTOR_OFFSET 0x800000
81 enum { UDF_MAX_LINKS = 0xffff };
83 /* These are the "meat" - everything else is stuffing */
84 static int udf_fill_super(struct super_block *, void *, int);
85 static void udf_put_super(struct super_block *);
86 static int udf_sync_fs(struct super_block *, int);
87 static int udf_remount_fs(struct super_block *, int *, char *);
88 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
89 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
90 struct kernel_lb_addr *);
91 static void udf_load_fileset(struct super_block *, struct buffer_head *,
92 struct kernel_lb_addr *);
93 static void udf_open_lvid(struct super_block *);
94 static void udf_close_lvid(struct super_block *);
95 static unsigned int udf_count_free(struct super_block *);
96 static int udf_statfs(struct dentry *, struct kstatfs *);
97 static int udf_show_options(struct seq_file *, struct dentry *);
99 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
101 struct logicalVolIntegrityDesc *lvid;
102 unsigned int partnum;
105 if (!UDF_SB(sb)->s_lvid_bh)
107 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
108 partnum = le32_to_cpu(lvid->numOfPartitions);
109 if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
110 offsetof(struct logicalVolIntegrityDesc, impUse)) /
111 (2 * sizeof(uint32_t)) < partnum) {
112 udf_err(sb, "Logical volume integrity descriptor corrupted "
113 "(numOfPartitions = %u)!\n", partnum);
116 /* The offset is to skip freeSpaceTable and sizeTable arrays */
117 offset = partnum * 2 * sizeof(uint32_t);
118 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
121 /* UDF filesystem type */
122 static struct dentry *udf_mount(struct file_system_type *fs_type,
123 int flags, const char *dev_name, void *data)
125 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
128 static struct file_system_type udf_fstype = {
129 .owner = THIS_MODULE,
132 .kill_sb = kill_block_super,
133 .fs_flags = FS_REQUIRES_DEV,
135 MODULE_ALIAS_FS("udf");
137 static struct kmem_cache *udf_inode_cachep;
139 static struct inode *udf_alloc_inode(struct super_block *sb)
141 struct udf_inode_info *ei;
142 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
147 ei->i_lenExtents = 0;
148 ei->i_next_alloc_block = 0;
149 ei->i_next_alloc_goal = 0;
151 init_rwsem(&ei->i_data_sem);
152 ei->cached_extent.lstart = -1;
153 spin_lock_init(&ei->i_extent_cache_lock);
155 return &ei->vfs_inode;
158 static void udf_i_callback(struct rcu_head *head)
160 struct inode *inode = container_of(head, struct inode, i_rcu);
161 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
164 static void udf_destroy_inode(struct inode *inode)
166 call_rcu(&inode->i_rcu, udf_i_callback);
169 static void init_once(void *foo)
171 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
173 ei->i_ext.i_data = NULL;
174 inode_init_once(&ei->vfs_inode);
177 static int __init init_inodecache(void)
179 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
180 sizeof(struct udf_inode_info),
181 0, (SLAB_RECLAIM_ACCOUNT |
185 if (!udf_inode_cachep)
190 static void destroy_inodecache(void)
193 * Make sure all delayed rcu free inodes are flushed before we
197 kmem_cache_destroy(udf_inode_cachep);
200 /* Superblock operations */
201 static const struct super_operations udf_sb_ops = {
202 .alloc_inode = udf_alloc_inode,
203 .destroy_inode = udf_destroy_inode,
204 .write_inode = udf_write_inode,
205 .evict_inode = udf_evict_inode,
206 .put_super = udf_put_super,
207 .sync_fs = udf_sync_fs,
208 .statfs = udf_statfs,
209 .remount_fs = udf_remount_fs,
210 .show_options = udf_show_options,
215 unsigned int blocksize;
216 unsigned int session;
217 unsigned int lastblock;
220 unsigned short partition;
221 unsigned int fileset;
222 unsigned int rootdir;
229 struct nls_table *nls_map;
232 static int __init init_udf_fs(void)
236 err = init_inodecache();
239 err = register_filesystem(&udf_fstype);
246 destroy_inodecache();
252 static void __exit exit_udf_fs(void)
254 unregister_filesystem(&udf_fstype);
255 destroy_inodecache();
258 module_init(init_udf_fs)
259 module_exit(exit_udf_fs)
261 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
263 struct udf_sb_info *sbi = UDF_SB(sb);
265 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
267 if (!sbi->s_partmaps) {
268 udf_err(sb, "Unable to allocate space for %d partition maps\n",
270 sbi->s_partitions = 0;
274 sbi->s_partitions = count;
278 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
281 int nr_groups = bitmap->s_nr_groups;
282 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
285 for (i = 0; i < nr_groups; i++)
286 if (bitmap->s_block_bitmap[i])
287 brelse(bitmap->s_block_bitmap[i]);
289 if (size <= PAGE_SIZE)
295 static void udf_free_partition(struct udf_part_map *map)
298 struct udf_meta_data *mdata;
300 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
301 iput(map->s_uspace.s_table);
302 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
303 iput(map->s_fspace.s_table);
304 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
305 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
306 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
307 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
308 if (map->s_partition_type == UDF_SPARABLE_MAP15)
309 for (i = 0; i < 4; i++)
310 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
311 else if (map->s_partition_type == UDF_METADATA_MAP25) {
312 mdata = &map->s_type_specific.s_metadata;
313 iput(mdata->s_metadata_fe);
314 mdata->s_metadata_fe = NULL;
316 iput(mdata->s_mirror_fe);
317 mdata->s_mirror_fe = NULL;
319 iput(mdata->s_bitmap_fe);
320 mdata->s_bitmap_fe = NULL;
324 static void udf_sb_free_partitions(struct super_block *sb)
326 struct udf_sb_info *sbi = UDF_SB(sb);
328 if (sbi->s_partmaps == NULL)
330 for (i = 0; i < sbi->s_partitions; i++)
331 udf_free_partition(&sbi->s_partmaps[i]);
332 kfree(sbi->s_partmaps);
333 sbi->s_partmaps = NULL;
336 static int udf_show_options(struct seq_file *seq, struct dentry *root)
338 struct super_block *sb = root->d_sb;
339 struct udf_sb_info *sbi = UDF_SB(sb);
341 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
342 seq_puts(seq, ",nostrict");
343 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
344 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
345 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
346 seq_puts(seq, ",unhide");
347 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
348 seq_puts(seq, ",undelete");
349 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
350 seq_puts(seq, ",noadinicb");
351 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
352 seq_puts(seq, ",shortad");
353 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
354 seq_puts(seq, ",uid=forget");
355 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
356 seq_puts(seq, ",uid=ignore");
357 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
358 seq_puts(seq, ",gid=forget");
359 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
360 seq_puts(seq, ",gid=ignore");
361 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
362 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
363 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
364 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
365 if (sbi->s_umask != 0)
366 seq_printf(seq, ",umask=%ho", sbi->s_umask);
367 if (sbi->s_fmode != UDF_INVALID_MODE)
368 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
369 if (sbi->s_dmode != UDF_INVALID_MODE)
370 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
371 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
372 seq_printf(seq, ",session=%u", sbi->s_session);
373 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
374 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
375 if (sbi->s_anchor != 0)
376 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
378 * volume, partition, fileset and rootdir seem to be ignored
381 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
382 seq_puts(seq, ",utf8");
383 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
384 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
393 * Parse mount options.
396 * The following mount options are supported:
398 * gid= Set the default group.
399 * umask= Set the default umask.
400 * mode= Set the default file permissions.
401 * dmode= Set the default directory permissions.
402 * uid= Set the default user.
403 * bs= Set the block size.
404 * unhide Show otherwise hidden files.
405 * undelete Show deleted files in lists.
406 * adinicb Embed data in the inode (default)
407 * noadinicb Don't embed data in the inode
408 * shortad Use short ad's
409 * longad Use long ad's (default)
410 * nostrict Unset strict conformance
411 * iocharset= Set the NLS character set
413 * The remaining are for debugging and disaster recovery:
415 * novrs Skip volume sequence recognition
417 * The following expect a offset from 0.
419 * session= Set the CDROM session (default= last session)
420 * anchor= Override standard anchor location. (default= 256)
421 * volume= Override the VolumeDesc location. (unused)
422 * partition= Override the PartitionDesc location. (unused)
423 * lastblock= Set the last block of the filesystem/
425 * The following expect a offset from the partition root.
427 * fileset= Override the fileset block location. (unused)
428 * rootdir= Override the root directory location. (unused)
429 * WARNING: overriding the rootdir to a non-directory may
430 * yield highly unpredictable results.
433 * options Pointer to mount options string.
434 * uopts Pointer to mount options variable.
437 * <return> 1 Mount options parsed okay.
438 * <return> 0 Error parsing mount options.
441 * July 1, 1997 - Andrew E. Mileski
442 * Written, tested, and released.
446 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
447 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
448 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
449 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
450 Opt_rootdir, Opt_utf8, Opt_iocharset,
451 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
455 static const match_table_t tokens = {
456 {Opt_novrs, "novrs"},
457 {Opt_nostrict, "nostrict"},
459 {Opt_unhide, "unhide"},
460 {Opt_undelete, "undelete"},
461 {Opt_noadinicb, "noadinicb"},
462 {Opt_adinicb, "adinicb"},
463 {Opt_shortad, "shortad"},
464 {Opt_longad, "longad"},
465 {Opt_uforget, "uid=forget"},
466 {Opt_uignore, "uid=ignore"},
467 {Opt_gforget, "gid=forget"},
468 {Opt_gignore, "gid=ignore"},
471 {Opt_umask, "umask=%o"},
472 {Opt_session, "session=%u"},
473 {Opt_lastblock, "lastblock=%u"},
474 {Opt_anchor, "anchor=%u"},
475 {Opt_volume, "volume=%u"},
476 {Opt_partition, "partition=%u"},
477 {Opt_fileset, "fileset=%u"},
478 {Opt_rootdir, "rootdir=%u"},
480 {Opt_iocharset, "iocharset=%s"},
481 {Opt_fmode, "mode=%o"},
482 {Opt_dmode, "dmode=%o"},
486 static int udf_parse_options(char *options, struct udf_options *uopt,
493 uopt->partition = 0xFFFF;
494 uopt->session = 0xFFFFFFFF;
497 uopt->volume = 0xFFFFFFFF;
498 uopt->rootdir = 0xFFFFFFFF;
499 uopt->fileset = 0xFFFFFFFF;
500 uopt->nls_map = NULL;
505 while ((p = strsep(&options, ",")) != NULL) {
506 substring_t args[MAX_OPT_ARGS];
512 token = match_token(p, tokens, args);
518 if (match_int(&args[0], &option))
521 if (n != 512 && n != 1024 && n != 2048 && n != 4096)
524 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
527 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
530 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
533 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
536 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
539 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
542 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
545 if (match_int(args, &option))
547 uopt->gid = make_kgid(current_user_ns(), option);
548 if (!gid_valid(uopt->gid))
550 uopt->flags |= (1 << UDF_FLAG_GID_SET);
553 if (match_int(args, &option))
555 uopt->uid = make_kuid(current_user_ns(), option);
556 if (!uid_valid(uopt->uid))
558 uopt->flags |= (1 << UDF_FLAG_UID_SET);
561 if (match_octal(args, &option))
563 uopt->umask = option;
566 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
569 if (match_int(args, &option))
571 uopt->session = option;
573 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
576 if (match_int(args, &option))
578 uopt->lastblock = option;
580 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
583 if (match_int(args, &option))
585 uopt->anchor = option;
588 if (match_int(args, &option))
590 uopt->volume = option;
593 if (match_int(args, &option))
595 uopt->partition = option;
598 if (match_int(args, &option))
600 uopt->fileset = option;
603 if (match_int(args, &option))
605 uopt->rootdir = option;
608 uopt->flags |= (1 << UDF_FLAG_UTF8);
610 #ifdef CONFIG_UDF_NLS
612 uopt->nls_map = load_nls(args[0].from);
613 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
617 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
620 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
623 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
626 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
629 if (match_octal(args, &option))
631 uopt->fmode = option & 0777;
634 if (match_octal(args, &option))
636 uopt->dmode = option & 0777;
639 pr_err("bad mount option \"%s\" or missing value\n", p);
646 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
648 struct udf_options uopt;
649 struct udf_sb_info *sbi = UDF_SB(sb);
651 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
655 int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
656 if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY))
660 uopt.flags = sbi->s_flags;
661 uopt.uid = sbi->s_uid;
662 uopt.gid = sbi->s_gid;
663 uopt.umask = sbi->s_umask;
664 uopt.fmode = sbi->s_fmode;
665 uopt.dmode = sbi->s_dmode;
667 if (!udf_parse_options(options, &uopt, true))
670 write_lock(&sbi->s_cred_lock);
671 sbi->s_flags = uopt.flags;
672 sbi->s_uid = uopt.uid;
673 sbi->s_gid = uopt.gid;
674 sbi->s_umask = uopt.umask;
675 sbi->s_fmode = uopt.fmode;
676 sbi->s_dmode = uopt.dmode;
677 write_unlock(&sbi->s_cred_lock);
679 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
682 if (*flags & MS_RDONLY)
691 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
692 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
693 static loff_t udf_check_vsd(struct super_block *sb)
695 struct volStructDesc *vsd = NULL;
696 loff_t sector = VSD_FIRST_SECTOR_OFFSET;
698 struct buffer_head *bh = NULL;
701 struct udf_sb_info *sbi;
704 if (sb->s_blocksize < sizeof(struct volStructDesc))
705 sectorsize = sizeof(struct volStructDesc);
707 sectorsize = sb->s_blocksize;
709 sector += (sbi->s_session << sb->s_blocksize_bits);
711 udf_debug("Starting at sector %u (%ld byte sectors)\n",
712 (unsigned int)(sector >> sb->s_blocksize_bits),
714 /* Process the sequence (if applicable). The hard limit on the sector
715 * offset is arbitrary, hopefully large enough so that all valid UDF
716 * filesystems will be recognised. There is no mention of an upper
717 * bound to the size of the volume recognition area in the standard.
718 * The limit will prevent the code to read all the sectors of a
719 * specially crafted image (like a bluray disc full of CD001 sectors),
720 * potentially causing minutes or even hours of uninterruptible I/O
721 * activity. This actually happened with uninitialised SSD partitions
722 * (all 0xFF) before the check for the limit and all valid IDs were
724 for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET;
725 sector += sectorsize) {
727 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
731 /* Look for ISO descriptors */
732 vsd = (struct volStructDesc *)(bh->b_data +
733 (sector & (sb->s_blocksize - 1)));
735 if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
737 switch (vsd->structType) {
739 udf_debug("ISO9660 Boot Record found\n");
742 udf_debug("ISO9660 Primary Volume Descriptor found\n");
745 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
748 udf_debug("ISO9660 Volume Partition Descriptor found\n");
751 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
754 udf_debug("ISO9660 VRS (%u) found\n",
758 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
761 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
765 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
768 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
771 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2,
774 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02,
778 /* invalid id : end of volume recognition area */
789 else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) ==
790 VSD_FIRST_SECTOR_OFFSET)
796 static int udf_find_fileset(struct super_block *sb,
797 struct kernel_lb_addr *fileset,
798 struct kernel_lb_addr *root)
800 struct buffer_head *bh = NULL;
803 struct udf_sb_info *sbi;
805 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
806 fileset->partitionReferenceNum != 0xFFFF) {
807 bh = udf_read_ptagged(sb, fileset, 0, &ident);
811 } else if (ident != TAG_IDENT_FSD) {
820 /* Search backwards through the partitions */
821 struct kernel_lb_addr newfileset;
823 /* --> cvg: FIXME - is it reasonable? */
826 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
827 (newfileset.partitionReferenceNum != 0xFFFF &&
828 fileset->logicalBlockNum == 0xFFFFFFFF &&
829 fileset->partitionReferenceNum == 0xFFFF);
830 newfileset.partitionReferenceNum--) {
831 lastblock = sbi->s_partmaps
832 [newfileset.partitionReferenceNum]
834 newfileset.logicalBlockNum = 0;
837 bh = udf_read_ptagged(sb, &newfileset, 0,
840 newfileset.logicalBlockNum++;
847 struct spaceBitmapDesc *sp;
848 sp = (struct spaceBitmapDesc *)
850 newfileset.logicalBlockNum += 1 +
851 ((le32_to_cpu(sp->numOfBytes) +
852 sizeof(struct spaceBitmapDesc)
853 - 1) >> sb->s_blocksize_bits);
858 *fileset = newfileset;
861 newfileset.logicalBlockNum++;
866 } while (newfileset.logicalBlockNum < lastblock &&
867 fileset->logicalBlockNum == 0xFFFFFFFF &&
868 fileset->partitionReferenceNum == 0xFFFF);
872 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
873 fileset->partitionReferenceNum != 0xFFFF) && bh) {
874 udf_debug("Fileset at block=%d, partition=%d\n",
875 fileset->logicalBlockNum,
876 fileset->partitionReferenceNum);
878 sbi->s_partition = fileset->partitionReferenceNum;
879 udf_load_fileset(sb, bh, root);
887 * Load primary Volume Descriptor Sequence
889 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
892 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
894 struct primaryVolDesc *pvoldesc;
895 struct ustr *instr, *outstr;
896 struct buffer_head *bh;
900 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
904 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
908 bh = udf_read_tagged(sb, block, block, &ident);
914 if (ident != TAG_IDENT_PVD) {
919 pvoldesc = (struct primaryVolDesc *)bh->b_data;
921 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
922 pvoldesc->recordingDateAndTime)) {
924 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
925 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
926 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
927 ts->minute, le16_to_cpu(ts->typeAndTimezone));
931 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) {
932 ret = udf_CS0toUTF8(outstr, instr);
936 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
937 outstr->u_len > 31 ? 31 : outstr->u_len);
938 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
941 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) {
942 ret = udf_CS0toUTF8(outstr, instr);
946 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
959 struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
960 u32 meta_file_loc, u32 partition_num)
962 struct kernel_lb_addr addr;
963 struct inode *metadata_fe;
965 addr.logicalBlockNum = meta_file_loc;
966 addr.partitionReferenceNum = partition_num;
968 metadata_fe = udf_iget_special(sb, &addr);
970 if (IS_ERR(metadata_fe)) {
971 udf_warn(sb, "metadata inode efe not found\n");
974 if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
975 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
977 return ERR_PTR(-EIO);
983 static int udf_load_metadata_files(struct super_block *sb, int partition)
985 struct udf_sb_info *sbi = UDF_SB(sb);
986 struct udf_part_map *map;
987 struct udf_meta_data *mdata;
988 struct kernel_lb_addr addr;
991 map = &sbi->s_partmaps[partition];
992 mdata = &map->s_type_specific.s_metadata;
994 /* metadata address */
995 udf_debug("Metadata file location: block = %d part = %d\n",
996 mdata->s_meta_file_loc, map->s_partition_num);
998 fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc,
999 map->s_partition_num);
1001 /* mirror file entry */
1002 udf_debug("Mirror metadata file location: block = %d part = %d\n",
1003 mdata->s_mirror_file_loc, map->s_partition_num);
1005 fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc,
1006 map->s_partition_num);
1009 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
1012 mdata->s_mirror_fe = fe;
1014 mdata->s_metadata_fe = fe;
1020 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1022 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
1023 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
1024 addr.partitionReferenceNum = map->s_partition_num;
1026 udf_debug("Bitmap file location: block = %d part = %d\n",
1027 addr.logicalBlockNum, addr.partitionReferenceNum);
1029 fe = udf_iget_special(sb, &addr);
1031 if (sb->s_flags & MS_RDONLY)
1032 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
1034 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
1038 mdata->s_bitmap_fe = fe;
1041 udf_debug("udf_load_metadata_files Ok\n");
1045 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
1046 struct kernel_lb_addr *root)
1048 struct fileSetDesc *fset;
1050 fset = (struct fileSetDesc *)bh->b_data;
1052 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1054 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1056 udf_debug("Rootdir at block=%d, partition=%d\n",
1057 root->logicalBlockNum, root->partitionReferenceNum);
1060 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1062 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
1063 return DIV_ROUND_UP(map->s_partition_len +
1064 (sizeof(struct spaceBitmapDesc) << 3),
1065 sb->s_blocksize * 8);
1068 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1070 struct udf_bitmap *bitmap;
1074 nr_groups = udf_compute_nr_groups(sb, index);
1075 size = sizeof(struct udf_bitmap) +
1076 (sizeof(struct buffer_head *) * nr_groups);
1078 if (size <= PAGE_SIZE)
1079 bitmap = kzalloc(size, GFP_KERNEL);
1081 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
1086 bitmap->s_nr_groups = nr_groups;
1090 static int udf_fill_partdesc_info(struct super_block *sb,
1091 struct partitionDesc *p, int p_index)
1093 struct udf_part_map *map;
1094 struct udf_sb_info *sbi = UDF_SB(sb);
1095 struct partitionHeaderDesc *phd;
1097 map = &sbi->s_partmaps[p_index];
1099 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1100 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1102 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1103 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1104 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1105 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1106 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1107 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1108 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1109 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1111 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1112 p_index, map->s_partition_type,
1113 map->s_partition_root, map->s_partition_len);
1115 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1116 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1119 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1120 if (phd->unallocSpaceTable.extLength) {
1121 struct kernel_lb_addr loc = {
1122 .logicalBlockNum = le32_to_cpu(
1123 phd->unallocSpaceTable.extPosition),
1124 .partitionReferenceNum = p_index,
1126 struct inode *inode;
1128 inode = udf_iget_special(sb, &loc);
1129 if (IS_ERR(inode)) {
1130 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1132 return PTR_ERR(inode);
1134 map->s_uspace.s_table = inode;
1135 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1136 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1137 p_index, map->s_uspace.s_table->i_ino);
1140 if (phd->unallocSpaceBitmap.extLength) {
1141 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1144 map->s_uspace.s_bitmap = bitmap;
1145 bitmap->s_extPosition = le32_to_cpu(
1146 phd->unallocSpaceBitmap.extPosition);
1147 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1148 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1149 p_index, bitmap->s_extPosition);
1152 if (phd->partitionIntegrityTable.extLength)
1153 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1155 if (phd->freedSpaceTable.extLength) {
1156 struct kernel_lb_addr loc = {
1157 .logicalBlockNum = le32_to_cpu(
1158 phd->freedSpaceTable.extPosition),
1159 .partitionReferenceNum = p_index,
1161 struct inode *inode;
1163 inode = udf_iget_special(sb, &loc);
1164 if (IS_ERR(inode)) {
1165 udf_debug("cannot load freedSpaceTable (part %d)\n",
1167 return PTR_ERR(inode);
1169 map->s_fspace.s_table = inode;
1170 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1171 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1172 p_index, map->s_fspace.s_table->i_ino);
1175 if (phd->freedSpaceBitmap.extLength) {
1176 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1179 map->s_fspace.s_bitmap = bitmap;
1180 bitmap->s_extPosition = le32_to_cpu(
1181 phd->freedSpaceBitmap.extPosition);
1182 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1183 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1184 p_index, bitmap->s_extPosition);
1189 static void udf_find_vat_block(struct super_block *sb, int p_index,
1190 int type1_index, sector_t start_block)
1192 struct udf_sb_info *sbi = UDF_SB(sb);
1193 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1195 struct kernel_lb_addr ino;
1196 struct inode *inode;
1199 * VAT file entry is in the last recorded block. Some broken disks have
1200 * it a few blocks before so try a bit harder...
1202 ino.partitionReferenceNum = type1_index;
1203 for (vat_block = start_block;
1204 vat_block >= map->s_partition_root &&
1205 vat_block >= start_block - 3; vat_block--) {
1206 ino.logicalBlockNum = vat_block - map->s_partition_root;
1207 inode = udf_iget_special(sb, &ino);
1208 if (!IS_ERR(inode)) {
1209 sbi->s_vat_inode = inode;
1215 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1217 struct udf_sb_info *sbi = UDF_SB(sb);
1218 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1219 struct buffer_head *bh = NULL;
1220 struct udf_inode_info *vati;
1222 struct virtualAllocationTable20 *vat20;
1223 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
1225 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
1226 if (!sbi->s_vat_inode &&
1227 sbi->s_last_block != blocks - 1) {
1228 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1229 (unsigned long)sbi->s_last_block,
1230 (unsigned long)blocks - 1);
1231 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
1233 if (!sbi->s_vat_inode)
1236 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1237 map->s_type_specific.s_virtual.s_start_offset = 0;
1238 map->s_type_specific.s_virtual.s_num_entries =
1239 (sbi->s_vat_inode->i_size - 36) >> 2;
1240 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1241 vati = UDF_I(sbi->s_vat_inode);
1242 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1243 pos = udf_block_map(sbi->s_vat_inode, 0);
1244 bh = sb_bread(sb, pos);
1247 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1249 vat20 = (struct virtualAllocationTable20 *)
1253 map->s_type_specific.s_virtual.s_start_offset =
1254 le16_to_cpu(vat20->lengthHeader);
1255 map->s_type_specific.s_virtual.s_num_entries =
1256 (sbi->s_vat_inode->i_size -
1257 map->s_type_specific.s_virtual.
1258 s_start_offset) >> 2;
1265 * Load partition descriptor block
1267 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1270 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1272 struct buffer_head *bh;
1273 struct partitionDesc *p;
1274 struct udf_part_map *map;
1275 struct udf_sb_info *sbi = UDF_SB(sb);
1277 uint16_t partitionNumber;
1281 bh = udf_read_tagged(sb, block, block, &ident);
1284 if (ident != TAG_IDENT_PD) {
1289 p = (struct partitionDesc *)bh->b_data;
1290 partitionNumber = le16_to_cpu(p->partitionNumber);
1292 /* First scan for TYPE1, SPARABLE and METADATA partitions */
1293 for (i = 0; i < sbi->s_partitions; i++) {
1294 map = &sbi->s_partmaps[i];
1295 udf_debug("Searching map: (%d == %d)\n",
1296 map->s_partition_num, partitionNumber);
1297 if (map->s_partition_num == partitionNumber &&
1298 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1299 map->s_partition_type == UDF_SPARABLE_MAP15))
1303 if (i >= sbi->s_partitions) {
1304 udf_debug("Partition (%d) not found in partition map\n",
1310 ret = udf_fill_partdesc_info(sb, p, i);
1315 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1316 * PHYSICAL partitions are already set up
1320 map = NULL; /* supress 'maybe used uninitialized' warning */
1322 for (i = 0; i < sbi->s_partitions; i++) {
1323 map = &sbi->s_partmaps[i];
1325 if (map->s_partition_num == partitionNumber &&
1326 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1327 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1328 map->s_partition_type == UDF_METADATA_MAP25))
1332 if (i >= sbi->s_partitions) {
1337 ret = udf_fill_partdesc_info(sb, p, i);
1341 if (map->s_partition_type == UDF_METADATA_MAP25) {
1342 ret = udf_load_metadata_files(sb, i);
1344 udf_err(sb, "error loading MetaData partition map %d\n",
1350 * If we have a partition with virtual map, we don't handle
1351 * writing to it (we overwrite blocks instead of relocating
1354 if (!(sb->s_flags & MS_RDONLY)) {
1358 ret = udf_load_vat(sb, i, type1_idx);
1364 /* In case loading failed, we handle cleanup in udf_fill_super */
1369 static int udf_load_sparable_map(struct super_block *sb,
1370 struct udf_part_map *map,
1371 struct sparablePartitionMap *spm)
1375 struct sparingTable *st;
1376 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1378 struct buffer_head *bh;
1380 map->s_partition_type = UDF_SPARABLE_MAP15;
1381 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1382 if (!is_power_of_2(sdata->s_packet_len)) {
1383 udf_err(sb, "error loading logical volume descriptor: "
1384 "Invalid packet length %u\n",
1385 (unsigned)sdata->s_packet_len);
1388 if (spm->numSparingTables > 4) {
1389 udf_err(sb, "error loading logical volume descriptor: "
1390 "Too many sparing tables (%d)\n",
1391 (int)spm->numSparingTables);
1395 for (i = 0; i < spm->numSparingTables; i++) {
1396 loc = le32_to_cpu(spm->locSparingTable[i]);
1397 bh = udf_read_tagged(sb, loc, loc, &ident);
1401 st = (struct sparingTable *)bh->b_data;
1403 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1404 strlen(UDF_ID_SPARING)) ||
1405 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1411 sdata->s_spar_map[i] = bh;
1413 map->s_partition_func = udf_get_pblock_spar15;
1417 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1418 struct kernel_lb_addr *fileset)
1420 struct logicalVolDesc *lvd;
1423 struct udf_sb_info *sbi = UDF_SB(sb);
1424 struct genericPartitionMap *gpm;
1426 struct buffer_head *bh;
1427 unsigned int table_len;
1430 bh = udf_read_tagged(sb, block, block, &ident);
1433 BUG_ON(ident != TAG_IDENT_LVD);
1434 lvd = (struct logicalVolDesc *)bh->b_data;
1435 table_len = le32_to_cpu(lvd->mapTableLength);
1436 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
1437 udf_err(sb, "error loading logical volume descriptor: "
1438 "Partition table too long (%u > %lu)\n", table_len,
1439 sb->s_blocksize - sizeof(*lvd));
1444 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1448 for (i = 0, offset = 0;
1449 i < sbi->s_partitions && offset < table_len;
1450 i++, offset += gpm->partitionMapLength) {
1451 struct udf_part_map *map = &sbi->s_partmaps[i];
1452 gpm = (struct genericPartitionMap *)
1453 &(lvd->partitionMaps[offset]);
1454 type = gpm->partitionMapType;
1456 struct genericPartitionMap1 *gpm1 =
1457 (struct genericPartitionMap1 *)gpm;
1458 map->s_partition_type = UDF_TYPE1_MAP15;
1459 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1460 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1461 map->s_partition_func = NULL;
1462 } else if (type == 2) {
1463 struct udfPartitionMap2 *upm2 =
1464 (struct udfPartitionMap2 *)gpm;
1465 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1466 strlen(UDF_ID_VIRTUAL))) {
1468 le16_to_cpu(((__le16 *)upm2->partIdent.
1471 map->s_partition_type =
1473 map->s_partition_func =
1474 udf_get_pblock_virt15;
1476 map->s_partition_type =
1478 map->s_partition_func =
1479 udf_get_pblock_virt20;
1481 } else if (!strncmp(upm2->partIdent.ident,
1483 strlen(UDF_ID_SPARABLE))) {
1484 ret = udf_load_sparable_map(sb, map,
1485 (struct sparablePartitionMap *)gpm);
1488 } else if (!strncmp(upm2->partIdent.ident,
1490 strlen(UDF_ID_METADATA))) {
1491 struct udf_meta_data *mdata =
1492 &map->s_type_specific.s_metadata;
1493 struct metadataPartitionMap *mdm =
1494 (struct metadataPartitionMap *)
1495 &(lvd->partitionMaps[offset]);
1496 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1497 i, type, UDF_ID_METADATA);
1499 map->s_partition_type = UDF_METADATA_MAP25;
1500 map->s_partition_func = udf_get_pblock_meta25;
1502 mdata->s_meta_file_loc =
1503 le32_to_cpu(mdm->metadataFileLoc);
1504 mdata->s_mirror_file_loc =
1505 le32_to_cpu(mdm->metadataMirrorFileLoc);
1506 mdata->s_bitmap_file_loc =
1507 le32_to_cpu(mdm->metadataBitmapFileLoc);
1508 mdata->s_alloc_unit_size =
1509 le32_to_cpu(mdm->allocUnitSize);
1510 mdata->s_align_unit_size =
1511 le16_to_cpu(mdm->alignUnitSize);
1512 if (mdm->flags & 0x01)
1513 mdata->s_flags |= MF_DUPLICATE_MD;
1515 udf_debug("Metadata Ident suffix=0x%x\n",
1516 le16_to_cpu(*(__le16 *)
1517 mdm->partIdent.identSuffix));
1518 udf_debug("Metadata part num=%d\n",
1519 le16_to_cpu(mdm->partitionNum));
1520 udf_debug("Metadata part alloc unit size=%d\n",
1521 le32_to_cpu(mdm->allocUnitSize));
1522 udf_debug("Metadata file loc=%d\n",
1523 le32_to_cpu(mdm->metadataFileLoc));
1524 udf_debug("Mirror file loc=%d\n",
1525 le32_to_cpu(mdm->metadataMirrorFileLoc));
1526 udf_debug("Bitmap file loc=%d\n",
1527 le32_to_cpu(mdm->metadataBitmapFileLoc));
1528 udf_debug("Flags: %d %d\n",
1529 mdata->s_flags, mdm->flags);
1531 udf_debug("Unknown ident: %s\n",
1532 upm2->partIdent.ident);
1535 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1536 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1538 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1539 i, map->s_partition_num, type, map->s_volumeseqnum);
1543 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1545 *fileset = lelb_to_cpu(la->extLocation);
1546 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1547 fileset->logicalBlockNum,
1548 fileset->partitionReferenceNum);
1550 if (lvd->integritySeqExt.extLength)
1551 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1559 * udf_load_logicalvolint
1562 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1564 struct buffer_head *bh = NULL;
1566 struct udf_sb_info *sbi = UDF_SB(sb);
1567 struct logicalVolIntegrityDesc *lvid;
1569 while (loc.extLength > 0 &&
1570 (bh = udf_read_tagged(sb, loc.extLocation,
1571 loc.extLocation, &ident)) &&
1572 ident == TAG_IDENT_LVID) {
1573 sbi->s_lvid_bh = bh;
1574 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1576 if (lvid->nextIntegrityExt.extLength)
1577 udf_load_logicalvolint(sb,
1578 leea_to_cpu(lvid->nextIntegrityExt));
1580 if (sbi->s_lvid_bh != bh)
1582 loc.extLength -= sb->s_blocksize;
1585 if (sbi->s_lvid_bh != bh)
1590 * Maximum number of Terminating Descriptor redirections. The chosen number is
1591 * arbitrary - just that we hopefully don't limit any real use of rewritten
1592 * inode on write-once media but avoid looping for too long on corrupted media.
1594 #define UDF_MAX_TD_NESTING 64
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 sb->s_bdev->bd_inode->i_size >> 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] >= sb->s_bdev->bd_inode->i_size >>
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;
1986 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1987 lvidiu = udf_sb_lvidiu(sb);
1991 mutex_lock(&sbi->s_alloc_mutex);
1992 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1993 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1994 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1996 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
1998 lvid->descTag.descCRC = cpu_to_le16(
1999 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
2000 le16_to_cpu(lvid->descTag.descCRCLength)));
2002 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
2003 mark_buffer_dirty(bh);
2004 sbi->s_lvid_dirty = 0;
2005 mutex_unlock(&sbi->s_alloc_mutex);
2006 /* Make opening of filesystem visible on the media immediately */
2007 sync_dirty_buffer(bh);
2010 static void udf_close_lvid(struct super_block *sb)
2012 struct udf_sb_info *sbi = UDF_SB(sb);
2013 struct buffer_head *bh = sbi->s_lvid_bh;
2014 struct logicalVolIntegrityDesc *lvid;
2015 struct logicalVolIntegrityDescImpUse *lvidiu;
2019 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2020 lvidiu = udf_sb_lvidiu(sb);
2024 mutex_lock(&sbi->s_alloc_mutex);
2025 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
2026 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
2027 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
2028 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
2029 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
2030 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
2031 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
2032 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
2033 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
2034 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
2036 lvid->descTag.descCRC = cpu_to_le16(
2037 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
2038 le16_to_cpu(lvid->descTag.descCRCLength)));
2040 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
2042 * We set buffer uptodate unconditionally here to avoid spurious
2043 * warnings from mark_buffer_dirty() when previous EIO has marked
2044 * the buffer as !uptodate
2046 set_buffer_uptodate(bh);
2047 mark_buffer_dirty(bh);
2048 sbi->s_lvid_dirty = 0;
2049 mutex_unlock(&sbi->s_alloc_mutex);
2050 /* Make closing of filesystem visible on the media immediately */
2051 sync_dirty_buffer(bh);
2054 u64 lvid_get_unique_id(struct super_block *sb)
2056 struct buffer_head *bh;
2057 struct udf_sb_info *sbi = UDF_SB(sb);
2058 struct logicalVolIntegrityDesc *lvid;
2059 struct logicalVolHeaderDesc *lvhd;
2063 bh = sbi->s_lvid_bh;
2067 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2068 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2070 mutex_lock(&sbi->s_alloc_mutex);
2071 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2072 if (!(++uniqueID & 0xFFFFFFFF))
2074 lvhd->uniqueID = cpu_to_le64(uniqueID);
2075 mutex_unlock(&sbi->s_alloc_mutex);
2076 mark_buffer_dirty(bh);
2081 static int udf_fill_super(struct super_block *sb, void *options, int silent)
2084 struct inode *inode = NULL;
2085 struct udf_options uopt;
2086 struct kernel_lb_addr rootdir, fileset;
2087 struct udf_sb_info *sbi;
2088 bool lvid_open = false;
2090 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
2091 uopt.uid = INVALID_UID;
2092 uopt.gid = INVALID_GID;
2094 uopt.fmode = UDF_INVALID_MODE;
2095 uopt.dmode = UDF_INVALID_MODE;
2097 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
2101 sb->s_fs_info = sbi;
2103 mutex_init(&sbi->s_alloc_mutex);
2105 if (!udf_parse_options((char *)options, &uopt, false))
2106 goto parse_options_failure;
2108 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
2109 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
2110 udf_err(sb, "utf8 cannot be combined with iocharset\n");
2111 goto parse_options_failure;
2113 #ifdef CONFIG_UDF_NLS
2114 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
2115 uopt.nls_map = load_nls_default();
2117 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2119 udf_debug("Using default NLS map\n");
2122 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2123 uopt.flags |= (1 << UDF_FLAG_UTF8);
2125 fileset.logicalBlockNum = 0xFFFFFFFF;
2126 fileset.partitionReferenceNum = 0xFFFF;
2128 sbi->s_flags = uopt.flags;
2129 sbi->s_uid = uopt.uid;
2130 sbi->s_gid = uopt.gid;
2131 sbi->s_umask = uopt.umask;
2132 sbi->s_fmode = uopt.fmode;
2133 sbi->s_dmode = uopt.dmode;
2134 sbi->s_nls_map = uopt.nls_map;
2135 rwlock_init(&sbi->s_cred_lock);
2137 if (uopt.session == 0xFFFFFFFF)
2138 sbi->s_session = udf_get_last_session(sb);
2140 sbi->s_session = uopt.session;
2142 udf_debug("Multi-session=%d\n", sbi->s_session);
2144 /* Fill in the rest of the superblock */
2145 sb->s_op = &udf_sb_ops;
2146 sb->s_export_op = &udf_export_ops;
2148 sb->s_magic = UDF_SUPER_MAGIC;
2149 sb->s_time_gran = 1000;
2151 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
2152 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2154 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
2155 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2156 if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
2158 pr_notice("Rescanning with blocksize %d\n",
2159 UDF_DEFAULT_BLOCKSIZE);
2160 brelse(sbi->s_lvid_bh);
2161 sbi->s_lvid_bh = NULL;
2162 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
2163 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2167 if (ret == -EAGAIN) {
2168 udf_warn(sb, "No partition found (1)\n");
2174 udf_debug("Lastblock=%d\n", sbi->s_last_block);
2176 if (sbi->s_lvid_bh) {
2177 struct logicalVolIntegrityDescImpUse *lvidiu =
2179 uint16_t minUDFReadRev;
2180 uint16_t minUDFWriteRev;
2186 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2187 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
2188 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
2189 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
2191 UDF_MAX_READ_VERSION);
2194 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2195 !(sb->s_flags & MS_RDONLY)) {
2200 sbi->s_udfrev = minUDFWriteRev;
2202 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2203 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2204 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2205 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2208 if (!sbi->s_partitions) {
2209 udf_warn(sb, "No partition found (2)\n");
2214 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2215 UDF_PART_FLAG_READ_ONLY &&
2216 !(sb->s_flags & MS_RDONLY)) {
2221 if (udf_find_fileset(sb, &fileset, &rootdir)) {
2222 udf_warn(sb, "No fileset found\n");
2228 struct timestamp ts;
2229 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2230 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2231 sbi->s_volume_ident,
2232 le16_to_cpu(ts.year), ts.month, ts.day,
2233 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2235 if (!(sb->s_flags & MS_RDONLY)) {
2240 /* Assign the root inode */
2241 /* assign inodes by physical block number */
2242 /* perhaps it's not extensible enough, but for now ... */
2243 inode = udf_iget(sb, &rootdir);
2244 if (IS_ERR(inode)) {
2245 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
2246 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2247 ret = PTR_ERR(inode);
2251 /* Allocate a dentry for the root inode */
2252 sb->s_root = d_make_root(inode);
2254 udf_err(sb, "Couldn't allocate root dentry\n");
2258 sb->s_maxbytes = MAX_LFS_FILESIZE;
2259 sb->s_max_links = UDF_MAX_LINKS;
2263 iput(sbi->s_vat_inode);
2264 parse_options_failure:
2265 #ifdef CONFIG_UDF_NLS
2266 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2267 unload_nls(sbi->s_nls_map);
2271 brelse(sbi->s_lvid_bh);
2272 udf_sb_free_partitions(sb);
2274 sb->s_fs_info = NULL;
2279 void _udf_err(struct super_block *sb, const char *function,
2280 const char *fmt, ...)
2282 struct va_format vaf;
2285 va_start(args, fmt);
2290 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2295 void _udf_warn(struct super_block *sb, const char *function,
2296 const char *fmt, ...)
2298 struct va_format vaf;
2301 va_start(args, fmt);
2306 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2311 static void udf_put_super(struct super_block *sb)
2313 struct udf_sb_info *sbi;
2317 iput(sbi->s_vat_inode);
2318 #ifdef CONFIG_UDF_NLS
2319 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2320 unload_nls(sbi->s_nls_map);
2322 if (!(sb->s_flags & MS_RDONLY))
2324 brelse(sbi->s_lvid_bh);
2325 udf_sb_free_partitions(sb);
2326 mutex_destroy(&sbi->s_alloc_mutex);
2327 kfree(sb->s_fs_info);
2328 sb->s_fs_info = NULL;
2331 static int udf_sync_fs(struct super_block *sb, int wait)
2333 struct udf_sb_info *sbi = UDF_SB(sb);
2335 mutex_lock(&sbi->s_alloc_mutex);
2336 if (sbi->s_lvid_dirty) {
2338 * Blockdevice will be synced later so we don't have to submit
2341 mark_buffer_dirty(sbi->s_lvid_bh);
2342 sbi->s_lvid_dirty = 0;
2344 mutex_unlock(&sbi->s_alloc_mutex);
2349 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2351 struct super_block *sb = dentry->d_sb;
2352 struct udf_sb_info *sbi = UDF_SB(sb);
2353 struct logicalVolIntegrityDescImpUse *lvidiu;
2354 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2356 lvidiu = udf_sb_lvidiu(sb);
2357 buf->f_type = UDF_SUPER_MAGIC;
2358 buf->f_bsize = sb->s_blocksize;
2359 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2360 buf->f_bfree = udf_count_free(sb);
2361 buf->f_bavail = buf->f_bfree;
2362 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2363 le32_to_cpu(lvidiu->numDirs)) : 0)
2365 buf->f_ffree = buf->f_bfree;
2366 buf->f_namelen = UDF_NAME_LEN - 2;
2367 buf->f_fsid.val[0] = (u32)id;
2368 buf->f_fsid.val[1] = (u32)(id >> 32);
2373 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2374 struct udf_bitmap *bitmap)
2376 struct buffer_head *bh = NULL;
2377 unsigned int accum = 0;
2379 int block = 0, newblock;
2380 struct kernel_lb_addr loc;
2384 struct spaceBitmapDesc *bm;
2386 loc.logicalBlockNum = bitmap->s_extPosition;
2387 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2388 bh = udf_read_ptagged(sb, &loc, 0, &ident);
2391 udf_err(sb, "udf_count_free failed\n");
2393 } else if (ident != TAG_IDENT_SBD) {
2395 udf_err(sb, "udf_count_free failed\n");
2399 bm = (struct spaceBitmapDesc *)bh->b_data;
2400 bytes = le32_to_cpu(bm->numOfBytes);
2401 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2402 ptr = (uint8_t *)bh->b_data;
2405 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2406 accum += bitmap_weight((const unsigned long *)(ptr + index),
2411 newblock = udf_get_lb_pblock(sb, &loc, ++block);
2412 bh = udf_tread(sb, newblock);
2414 udf_debug("read failed\n");
2418 ptr = (uint8_t *)bh->b_data;
2426 static unsigned int udf_count_free_table(struct super_block *sb,
2427 struct inode *table)
2429 unsigned int accum = 0;
2431 struct kernel_lb_addr eloc;
2433 struct extent_position epos;
2435 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
2436 epos.block = UDF_I(table)->i_location;
2437 epos.offset = sizeof(struct unallocSpaceEntry);
2440 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2441 accum += (elen >> table->i_sb->s_blocksize_bits);
2444 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
2449 static unsigned int udf_count_free(struct super_block *sb)
2451 unsigned int accum = 0;
2452 struct udf_sb_info *sbi;
2453 struct udf_part_map *map;
2456 if (sbi->s_lvid_bh) {
2457 struct logicalVolIntegrityDesc *lvid =
2458 (struct logicalVolIntegrityDesc *)
2459 sbi->s_lvid_bh->b_data;
2460 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2461 accum = le32_to_cpu(
2462 lvid->freeSpaceTable[sbi->s_partition]);
2463 if (accum == 0xFFFFFFFF)
2471 map = &sbi->s_partmaps[sbi->s_partition];
2472 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2473 accum += udf_count_free_bitmap(sb,
2474 map->s_uspace.s_bitmap);
2476 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2477 accum += udf_count_free_bitmap(sb,
2478 map->s_fspace.s_bitmap);
2483 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2484 accum += udf_count_free_table(sb,
2485 map->s_uspace.s_table);
2487 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2488 accum += udf_count_free_table(sb,
2489 map->s_fspace.s_table);