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 |
184 if (!udf_inode_cachep)
189 static void destroy_inodecache(void)
192 * Make sure all delayed rcu free inodes are flushed before we
196 kmem_cache_destroy(udf_inode_cachep);
199 /* Superblock operations */
200 static const struct super_operations udf_sb_ops = {
201 .alloc_inode = udf_alloc_inode,
202 .destroy_inode = udf_destroy_inode,
203 .write_inode = udf_write_inode,
204 .evict_inode = udf_evict_inode,
205 .put_super = udf_put_super,
206 .sync_fs = udf_sync_fs,
207 .statfs = udf_statfs,
208 .remount_fs = udf_remount_fs,
209 .show_options = udf_show_options,
214 unsigned int blocksize;
215 unsigned int session;
216 unsigned int lastblock;
219 unsigned short partition;
220 unsigned int fileset;
221 unsigned int rootdir;
228 struct nls_table *nls_map;
231 static int __init init_udf_fs(void)
235 err = init_inodecache();
238 err = register_filesystem(&udf_fstype);
245 destroy_inodecache();
251 static void __exit exit_udf_fs(void)
253 unregister_filesystem(&udf_fstype);
254 destroy_inodecache();
257 module_init(init_udf_fs)
258 module_exit(exit_udf_fs)
260 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
262 struct udf_sb_info *sbi = UDF_SB(sb);
264 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
266 if (!sbi->s_partmaps) {
267 udf_err(sb, "Unable to allocate space for %d partition maps\n",
269 sbi->s_partitions = 0;
273 sbi->s_partitions = count;
277 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
280 int nr_groups = bitmap->s_nr_groups;
281 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
284 for (i = 0; i < nr_groups; i++)
285 if (bitmap->s_block_bitmap[i])
286 brelse(bitmap->s_block_bitmap[i]);
288 if (size <= PAGE_SIZE)
294 static void udf_free_partition(struct udf_part_map *map)
297 struct udf_meta_data *mdata;
299 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
300 iput(map->s_uspace.s_table);
301 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
302 iput(map->s_fspace.s_table);
303 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
304 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
305 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
306 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
307 if (map->s_partition_type == UDF_SPARABLE_MAP15)
308 for (i = 0; i < 4; i++)
309 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
310 else if (map->s_partition_type == UDF_METADATA_MAP25) {
311 mdata = &map->s_type_specific.s_metadata;
312 iput(mdata->s_metadata_fe);
313 mdata->s_metadata_fe = NULL;
315 iput(mdata->s_mirror_fe);
316 mdata->s_mirror_fe = NULL;
318 iput(mdata->s_bitmap_fe);
319 mdata->s_bitmap_fe = NULL;
323 static void udf_sb_free_partitions(struct super_block *sb)
325 struct udf_sb_info *sbi = UDF_SB(sb);
327 if (sbi->s_partmaps == NULL)
329 for (i = 0; i < sbi->s_partitions; i++)
330 udf_free_partition(&sbi->s_partmaps[i]);
331 kfree(sbi->s_partmaps);
332 sbi->s_partmaps = NULL;
335 static int udf_show_options(struct seq_file *seq, struct dentry *root)
337 struct super_block *sb = root->d_sb;
338 struct udf_sb_info *sbi = UDF_SB(sb);
340 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
341 seq_puts(seq, ",nostrict");
342 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
343 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
344 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
345 seq_puts(seq, ",unhide");
346 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
347 seq_puts(seq, ",undelete");
348 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
349 seq_puts(seq, ",noadinicb");
350 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
351 seq_puts(seq, ",shortad");
352 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
353 seq_puts(seq, ",uid=forget");
354 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
355 seq_puts(seq, ",uid=ignore");
356 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
357 seq_puts(seq, ",gid=forget");
358 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
359 seq_puts(seq, ",gid=ignore");
360 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
361 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
362 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
363 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
364 if (sbi->s_umask != 0)
365 seq_printf(seq, ",umask=%ho", sbi->s_umask);
366 if (sbi->s_fmode != UDF_INVALID_MODE)
367 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
368 if (sbi->s_dmode != UDF_INVALID_MODE)
369 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
370 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
371 seq_printf(seq, ",session=%u", sbi->s_session);
372 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
373 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
374 if (sbi->s_anchor != 0)
375 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
377 * volume, partition, fileset and rootdir seem to be ignored
380 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
381 seq_puts(seq, ",utf8");
382 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
383 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
392 * Parse mount options.
395 * The following mount options are supported:
397 * gid= Set the default group.
398 * umask= Set the default umask.
399 * mode= Set the default file permissions.
400 * dmode= Set the default directory permissions.
401 * uid= Set the default user.
402 * bs= Set the block size.
403 * unhide Show otherwise hidden files.
404 * undelete Show deleted files in lists.
405 * adinicb Embed data in the inode (default)
406 * noadinicb Don't embed data in the inode
407 * shortad Use short ad's
408 * longad Use long ad's (default)
409 * nostrict Unset strict conformance
410 * iocharset= Set the NLS character set
412 * The remaining are for debugging and disaster recovery:
414 * novrs Skip volume sequence recognition
416 * The following expect a offset from 0.
418 * session= Set the CDROM session (default= last session)
419 * anchor= Override standard anchor location. (default= 256)
420 * volume= Override the VolumeDesc location. (unused)
421 * partition= Override the PartitionDesc location. (unused)
422 * lastblock= Set the last block of the filesystem/
424 * The following expect a offset from the partition root.
426 * fileset= Override the fileset block location. (unused)
427 * rootdir= Override the root directory location. (unused)
428 * WARNING: overriding the rootdir to a non-directory may
429 * yield highly unpredictable results.
432 * options Pointer to mount options string.
433 * uopts Pointer to mount options variable.
436 * <return> 1 Mount options parsed okay.
437 * <return> 0 Error parsing mount options.
440 * July 1, 1997 - Andrew E. Mileski
441 * Written, tested, and released.
445 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
446 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
447 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
448 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
449 Opt_rootdir, Opt_utf8, Opt_iocharset,
450 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
454 static const match_table_t tokens = {
455 {Opt_novrs, "novrs"},
456 {Opt_nostrict, "nostrict"},
458 {Opt_unhide, "unhide"},
459 {Opt_undelete, "undelete"},
460 {Opt_noadinicb, "noadinicb"},
461 {Opt_adinicb, "adinicb"},
462 {Opt_shortad, "shortad"},
463 {Opt_longad, "longad"},
464 {Opt_uforget, "uid=forget"},
465 {Opt_uignore, "uid=ignore"},
466 {Opt_gforget, "gid=forget"},
467 {Opt_gignore, "gid=ignore"},
470 {Opt_umask, "umask=%o"},
471 {Opt_session, "session=%u"},
472 {Opt_lastblock, "lastblock=%u"},
473 {Opt_anchor, "anchor=%u"},
474 {Opt_volume, "volume=%u"},
475 {Opt_partition, "partition=%u"},
476 {Opt_fileset, "fileset=%u"},
477 {Opt_rootdir, "rootdir=%u"},
479 {Opt_iocharset, "iocharset=%s"},
480 {Opt_fmode, "mode=%o"},
481 {Opt_dmode, "dmode=%o"},
485 static int udf_parse_options(char *options, struct udf_options *uopt,
492 uopt->partition = 0xFFFF;
493 uopt->session = 0xFFFFFFFF;
496 uopt->volume = 0xFFFFFFFF;
497 uopt->rootdir = 0xFFFFFFFF;
498 uopt->fileset = 0xFFFFFFFF;
499 uopt->nls_map = NULL;
504 while ((p = strsep(&options, ",")) != NULL) {
505 substring_t args[MAX_OPT_ARGS];
511 token = match_token(p, tokens, args);
517 if (match_int(&args[0], &option))
520 if (n != 512 && n != 1024 && n != 2048 && n != 4096)
523 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
526 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
529 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
532 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
535 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
538 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
541 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
544 if (match_int(args, &option))
546 uopt->gid = make_kgid(current_user_ns(), option);
547 if (!gid_valid(uopt->gid))
549 uopt->flags |= (1 << UDF_FLAG_GID_SET);
552 if (match_int(args, &option))
554 uopt->uid = make_kuid(current_user_ns(), option);
555 if (!uid_valid(uopt->uid))
557 uopt->flags |= (1 << UDF_FLAG_UID_SET);
560 if (match_octal(args, &option))
562 uopt->umask = option;
565 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
568 if (match_int(args, &option))
570 uopt->session = option;
572 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
575 if (match_int(args, &option))
577 uopt->lastblock = option;
579 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
582 if (match_int(args, &option))
584 uopt->anchor = option;
587 if (match_int(args, &option))
589 uopt->volume = option;
592 if (match_int(args, &option))
594 uopt->partition = option;
597 if (match_int(args, &option))
599 uopt->fileset = option;
602 if (match_int(args, &option))
604 uopt->rootdir = option;
607 uopt->flags |= (1 << UDF_FLAG_UTF8);
609 #ifdef CONFIG_UDF_NLS
611 uopt->nls_map = load_nls(args[0].from);
612 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
616 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
619 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
622 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
625 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
628 if (match_octal(args, &option))
630 uopt->fmode = option & 0777;
633 if (match_octal(args, &option))
635 uopt->dmode = option & 0777;
638 pr_err("bad mount option \"%s\" or missing value\n", p);
645 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
647 struct udf_options uopt;
648 struct udf_sb_info *sbi = UDF_SB(sb);
650 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
654 int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
655 if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY))
659 uopt.flags = sbi->s_flags;
660 uopt.uid = sbi->s_uid;
661 uopt.gid = sbi->s_gid;
662 uopt.umask = sbi->s_umask;
663 uopt.fmode = sbi->s_fmode;
664 uopt.dmode = sbi->s_dmode;
666 if (!udf_parse_options(options, &uopt, true))
669 write_lock(&sbi->s_cred_lock);
670 sbi->s_flags = uopt.flags;
671 sbi->s_uid = uopt.uid;
672 sbi->s_gid = uopt.gid;
673 sbi->s_umask = uopt.umask;
674 sbi->s_fmode = uopt.fmode;
675 sbi->s_dmode = uopt.dmode;
676 write_unlock(&sbi->s_cred_lock);
678 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
681 if (*flags & MS_RDONLY)
690 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
691 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
692 static loff_t udf_check_vsd(struct super_block *sb)
694 struct volStructDesc *vsd = NULL;
695 loff_t sector = VSD_FIRST_SECTOR_OFFSET;
697 struct buffer_head *bh = NULL;
700 struct udf_sb_info *sbi;
703 if (sb->s_blocksize < sizeof(struct volStructDesc))
704 sectorsize = sizeof(struct volStructDesc);
706 sectorsize = sb->s_blocksize;
708 sector += (sbi->s_session << sb->s_blocksize_bits);
710 udf_debug("Starting at sector %u (%ld byte sectors)\n",
711 (unsigned int)(sector >> sb->s_blocksize_bits),
713 /* Process the sequence (if applicable). The hard limit on the sector
714 * offset is arbitrary, hopefully large enough so that all valid UDF
715 * filesystems will be recognised. There is no mention of an upper
716 * bound to the size of the volume recognition area in the standard.
717 * The limit will prevent the code to read all the sectors of a
718 * specially crafted image (like a bluray disc full of CD001 sectors),
719 * potentially causing minutes or even hours of uninterruptible I/O
720 * activity. This actually happened with uninitialised SSD partitions
721 * (all 0xFF) before the check for the limit and all valid IDs were
723 for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET;
724 sector += sectorsize) {
726 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
730 /* Look for ISO descriptors */
731 vsd = (struct volStructDesc *)(bh->b_data +
732 (sector & (sb->s_blocksize - 1)));
734 if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
736 switch (vsd->structType) {
738 udf_debug("ISO9660 Boot Record found\n");
741 udf_debug("ISO9660 Primary Volume Descriptor found\n");
744 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
747 udf_debug("ISO9660 Volume Partition Descriptor found\n");
750 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
753 udf_debug("ISO9660 VRS (%u) found\n",
757 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
760 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
764 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
767 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
770 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2,
773 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02,
777 /* invalid id : end of volume recognition area */
788 else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) ==
789 VSD_FIRST_SECTOR_OFFSET)
795 static int udf_find_fileset(struct super_block *sb,
796 struct kernel_lb_addr *fileset,
797 struct kernel_lb_addr *root)
799 struct buffer_head *bh = NULL;
802 struct udf_sb_info *sbi;
804 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
805 fileset->partitionReferenceNum != 0xFFFF) {
806 bh = udf_read_ptagged(sb, fileset, 0, &ident);
810 } else if (ident != TAG_IDENT_FSD) {
819 /* Search backwards through the partitions */
820 struct kernel_lb_addr newfileset;
822 /* --> cvg: FIXME - is it reasonable? */
825 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
826 (newfileset.partitionReferenceNum != 0xFFFF &&
827 fileset->logicalBlockNum == 0xFFFFFFFF &&
828 fileset->partitionReferenceNum == 0xFFFF);
829 newfileset.partitionReferenceNum--) {
830 lastblock = sbi->s_partmaps
831 [newfileset.partitionReferenceNum]
833 newfileset.logicalBlockNum = 0;
836 bh = udf_read_ptagged(sb, &newfileset, 0,
839 newfileset.logicalBlockNum++;
846 struct spaceBitmapDesc *sp;
847 sp = (struct spaceBitmapDesc *)
849 newfileset.logicalBlockNum += 1 +
850 ((le32_to_cpu(sp->numOfBytes) +
851 sizeof(struct spaceBitmapDesc)
852 - 1) >> sb->s_blocksize_bits);
857 *fileset = newfileset;
860 newfileset.logicalBlockNum++;
865 } while (newfileset.logicalBlockNum < lastblock &&
866 fileset->logicalBlockNum == 0xFFFFFFFF &&
867 fileset->partitionReferenceNum == 0xFFFF);
871 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
872 fileset->partitionReferenceNum != 0xFFFF) && bh) {
873 udf_debug("Fileset at block=%d, partition=%d\n",
874 fileset->logicalBlockNum,
875 fileset->partitionReferenceNum);
877 sbi->s_partition = fileset->partitionReferenceNum;
878 udf_load_fileset(sb, bh, root);
886 * Load primary Volume Descriptor Sequence
888 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
891 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
893 struct primaryVolDesc *pvoldesc;
894 struct ustr *instr, *outstr;
895 struct buffer_head *bh;
899 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
903 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
907 bh = udf_read_tagged(sb, block, block, &ident);
913 if (ident != TAG_IDENT_PVD) {
918 pvoldesc = (struct primaryVolDesc *)bh->b_data;
920 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
921 pvoldesc->recordingDateAndTime)) {
923 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
924 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
925 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
926 ts->minute, le16_to_cpu(ts->typeAndTimezone));
930 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
931 if (udf_CS0toUTF8(outstr, instr)) {
932 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
933 outstr->u_len > 31 ? 31 : outstr->u_len);
934 udf_debug("volIdent[] = '%s'\n",
935 UDF_SB(sb)->s_volume_ident);
938 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
939 if (udf_CS0toUTF8(outstr, instr))
940 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
952 struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
953 u32 meta_file_loc, u32 partition_num)
955 struct kernel_lb_addr addr;
956 struct inode *metadata_fe;
958 addr.logicalBlockNum = meta_file_loc;
959 addr.partitionReferenceNum = partition_num;
961 metadata_fe = udf_iget_special(sb, &addr);
963 if (IS_ERR(metadata_fe)) {
964 udf_warn(sb, "metadata inode efe not found\n");
967 if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
968 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
970 return ERR_PTR(-EIO);
976 static int udf_load_metadata_files(struct super_block *sb, int partition)
978 struct udf_sb_info *sbi = UDF_SB(sb);
979 struct udf_part_map *map;
980 struct udf_meta_data *mdata;
981 struct kernel_lb_addr addr;
984 map = &sbi->s_partmaps[partition];
985 mdata = &map->s_type_specific.s_metadata;
987 /* metadata address */
988 udf_debug("Metadata file location: block = %d part = %d\n",
989 mdata->s_meta_file_loc, map->s_partition_num);
991 fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc,
992 map->s_partition_num);
994 /* mirror file entry */
995 udf_debug("Mirror metadata file location: block = %d part = %d\n",
996 mdata->s_mirror_file_loc, map->s_partition_num);
998 fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc,
999 map->s_partition_num);
1002 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
1005 mdata->s_mirror_fe = fe;
1007 mdata->s_metadata_fe = fe;
1013 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1015 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
1016 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
1017 addr.partitionReferenceNum = map->s_partition_num;
1019 udf_debug("Bitmap file location: block = %d part = %d\n",
1020 addr.logicalBlockNum, addr.partitionReferenceNum);
1022 fe = udf_iget_special(sb, &addr);
1024 if (sb->s_flags & MS_RDONLY)
1025 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
1027 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
1031 mdata->s_bitmap_fe = fe;
1034 udf_debug("udf_load_metadata_files Ok\n");
1038 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
1039 struct kernel_lb_addr *root)
1041 struct fileSetDesc *fset;
1043 fset = (struct fileSetDesc *)bh->b_data;
1045 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1047 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1049 udf_debug("Rootdir at block=%d, partition=%d\n",
1050 root->logicalBlockNum, root->partitionReferenceNum);
1053 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1055 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
1056 return DIV_ROUND_UP(map->s_partition_len +
1057 (sizeof(struct spaceBitmapDesc) << 3),
1058 sb->s_blocksize * 8);
1061 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1063 struct udf_bitmap *bitmap;
1067 nr_groups = udf_compute_nr_groups(sb, index);
1068 size = sizeof(struct udf_bitmap) +
1069 (sizeof(struct buffer_head *) * nr_groups);
1071 if (size <= PAGE_SIZE)
1072 bitmap = kzalloc(size, GFP_KERNEL);
1074 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
1079 bitmap->s_nr_groups = nr_groups;
1083 static int udf_fill_partdesc_info(struct super_block *sb,
1084 struct partitionDesc *p, int p_index)
1086 struct udf_part_map *map;
1087 struct udf_sb_info *sbi = UDF_SB(sb);
1088 struct partitionHeaderDesc *phd;
1090 map = &sbi->s_partmaps[p_index];
1092 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1093 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1095 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1096 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1097 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1098 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1099 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1100 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1101 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1102 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1104 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1105 p_index, map->s_partition_type,
1106 map->s_partition_root, map->s_partition_len);
1108 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1109 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1112 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1113 if (phd->unallocSpaceTable.extLength) {
1114 struct kernel_lb_addr loc = {
1115 .logicalBlockNum = le32_to_cpu(
1116 phd->unallocSpaceTable.extPosition),
1117 .partitionReferenceNum = p_index,
1119 struct inode *inode;
1121 inode = udf_iget_special(sb, &loc);
1122 if (IS_ERR(inode)) {
1123 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1125 return PTR_ERR(inode);
1127 map->s_uspace.s_table = inode;
1128 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1129 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1130 p_index, map->s_uspace.s_table->i_ino);
1133 if (phd->unallocSpaceBitmap.extLength) {
1134 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1137 map->s_uspace.s_bitmap = bitmap;
1138 bitmap->s_extPosition = le32_to_cpu(
1139 phd->unallocSpaceBitmap.extPosition);
1140 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1141 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1142 p_index, bitmap->s_extPosition);
1145 if (phd->partitionIntegrityTable.extLength)
1146 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1148 if (phd->freedSpaceTable.extLength) {
1149 struct kernel_lb_addr loc = {
1150 .logicalBlockNum = le32_to_cpu(
1151 phd->freedSpaceTable.extPosition),
1152 .partitionReferenceNum = p_index,
1154 struct inode *inode;
1156 inode = udf_iget_special(sb, &loc);
1157 if (IS_ERR(inode)) {
1158 udf_debug("cannot load freedSpaceTable (part %d)\n",
1160 return PTR_ERR(inode);
1162 map->s_fspace.s_table = inode;
1163 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1164 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1165 p_index, map->s_fspace.s_table->i_ino);
1168 if (phd->freedSpaceBitmap.extLength) {
1169 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1172 map->s_fspace.s_bitmap = bitmap;
1173 bitmap->s_extPosition = le32_to_cpu(
1174 phd->freedSpaceBitmap.extPosition);
1175 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1176 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1177 p_index, bitmap->s_extPosition);
1182 static void udf_find_vat_block(struct super_block *sb, int p_index,
1183 int type1_index, sector_t start_block)
1185 struct udf_sb_info *sbi = UDF_SB(sb);
1186 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1188 struct kernel_lb_addr ino;
1189 struct inode *inode;
1192 * VAT file entry is in the last recorded block. Some broken disks have
1193 * it a few blocks before so try a bit harder...
1195 ino.partitionReferenceNum = type1_index;
1196 for (vat_block = start_block;
1197 vat_block >= map->s_partition_root &&
1198 vat_block >= start_block - 3; vat_block--) {
1199 ino.logicalBlockNum = vat_block - map->s_partition_root;
1200 inode = udf_iget_special(sb, &ino);
1201 if (!IS_ERR(inode)) {
1202 sbi->s_vat_inode = inode;
1208 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1210 struct udf_sb_info *sbi = UDF_SB(sb);
1211 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1212 struct buffer_head *bh = NULL;
1213 struct udf_inode_info *vati;
1215 struct virtualAllocationTable20 *vat20;
1216 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
1218 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
1219 if (!sbi->s_vat_inode &&
1220 sbi->s_last_block != blocks - 1) {
1221 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1222 (unsigned long)sbi->s_last_block,
1223 (unsigned long)blocks - 1);
1224 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
1226 if (!sbi->s_vat_inode)
1229 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1230 map->s_type_specific.s_virtual.s_start_offset = 0;
1231 map->s_type_specific.s_virtual.s_num_entries =
1232 (sbi->s_vat_inode->i_size - 36) >> 2;
1233 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1234 vati = UDF_I(sbi->s_vat_inode);
1235 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1236 pos = udf_block_map(sbi->s_vat_inode, 0);
1237 bh = sb_bread(sb, pos);
1240 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1242 vat20 = (struct virtualAllocationTable20 *)
1246 map->s_type_specific.s_virtual.s_start_offset =
1247 le16_to_cpu(vat20->lengthHeader);
1248 map->s_type_specific.s_virtual.s_num_entries =
1249 (sbi->s_vat_inode->i_size -
1250 map->s_type_specific.s_virtual.
1251 s_start_offset) >> 2;
1258 * Load partition descriptor block
1260 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1263 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1265 struct buffer_head *bh;
1266 struct partitionDesc *p;
1267 struct udf_part_map *map;
1268 struct udf_sb_info *sbi = UDF_SB(sb);
1270 uint16_t partitionNumber;
1274 bh = udf_read_tagged(sb, block, block, &ident);
1277 if (ident != TAG_IDENT_PD) {
1282 p = (struct partitionDesc *)bh->b_data;
1283 partitionNumber = le16_to_cpu(p->partitionNumber);
1285 /* First scan for TYPE1, SPARABLE and METADATA partitions */
1286 for (i = 0; i < sbi->s_partitions; i++) {
1287 map = &sbi->s_partmaps[i];
1288 udf_debug("Searching map: (%d == %d)\n",
1289 map->s_partition_num, partitionNumber);
1290 if (map->s_partition_num == partitionNumber &&
1291 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1292 map->s_partition_type == UDF_SPARABLE_MAP15))
1296 if (i >= sbi->s_partitions) {
1297 udf_debug("Partition (%d) not found in partition map\n",
1303 ret = udf_fill_partdesc_info(sb, p, i);
1308 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1309 * PHYSICAL partitions are already set up
1313 map = NULL; /* supress 'maybe used uninitialized' warning */
1315 for (i = 0; i < sbi->s_partitions; i++) {
1316 map = &sbi->s_partmaps[i];
1318 if (map->s_partition_num == partitionNumber &&
1319 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1320 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1321 map->s_partition_type == UDF_METADATA_MAP25))
1325 if (i >= sbi->s_partitions) {
1330 ret = udf_fill_partdesc_info(sb, p, i);
1334 if (map->s_partition_type == UDF_METADATA_MAP25) {
1335 ret = udf_load_metadata_files(sb, i);
1337 udf_err(sb, "error loading MetaData partition map %d\n",
1343 * If we have a partition with virtual map, we don't handle
1344 * writing to it (we overwrite blocks instead of relocating
1347 if (!(sb->s_flags & MS_RDONLY)) {
1351 ret = udf_load_vat(sb, i, type1_idx);
1357 /* In case loading failed, we handle cleanup in udf_fill_super */
1362 static int udf_load_sparable_map(struct super_block *sb,
1363 struct udf_part_map *map,
1364 struct sparablePartitionMap *spm)
1368 struct sparingTable *st;
1369 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1371 struct buffer_head *bh;
1373 map->s_partition_type = UDF_SPARABLE_MAP15;
1374 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1375 if (!is_power_of_2(sdata->s_packet_len)) {
1376 udf_err(sb, "error loading logical volume descriptor: "
1377 "Invalid packet length %u\n",
1378 (unsigned)sdata->s_packet_len);
1381 if (spm->numSparingTables > 4) {
1382 udf_err(sb, "error loading logical volume descriptor: "
1383 "Too many sparing tables (%d)\n",
1384 (int)spm->numSparingTables);
1388 for (i = 0; i < spm->numSparingTables; i++) {
1389 loc = le32_to_cpu(spm->locSparingTable[i]);
1390 bh = udf_read_tagged(sb, loc, loc, &ident);
1394 st = (struct sparingTable *)bh->b_data;
1396 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1397 strlen(UDF_ID_SPARING)) ||
1398 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1404 sdata->s_spar_map[i] = bh;
1406 map->s_partition_func = udf_get_pblock_spar15;
1410 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1411 struct kernel_lb_addr *fileset)
1413 struct logicalVolDesc *lvd;
1416 struct udf_sb_info *sbi = UDF_SB(sb);
1417 struct genericPartitionMap *gpm;
1419 struct buffer_head *bh;
1420 unsigned int table_len;
1423 bh = udf_read_tagged(sb, block, block, &ident);
1426 BUG_ON(ident != TAG_IDENT_LVD);
1427 lvd = (struct logicalVolDesc *)bh->b_data;
1428 table_len = le32_to_cpu(lvd->mapTableLength);
1429 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
1430 udf_err(sb, "error loading logical volume descriptor: "
1431 "Partition table too long (%u > %lu)\n", table_len,
1432 sb->s_blocksize - sizeof(*lvd));
1437 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1441 for (i = 0, offset = 0;
1442 i < sbi->s_partitions && offset < table_len;
1443 i++, offset += gpm->partitionMapLength) {
1444 struct udf_part_map *map = &sbi->s_partmaps[i];
1445 gpm = (struct genericPartitionMap *)
1446 &(lvd->partitionMaps[offset]);
1447 type = gpm->partitionMapType;
1449 struct genericPartitionMap1 *gpm1 =
1450 (struct genericPartitionMap1 *)gpm;
1451 map->s_partition_type = UDF_TYPE1_MAP15;
1452 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1453 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1454 map->s_partition_func = NULL;
1455 } else if (type == 2) {
1456 struct udfPartitionMap2 *upm2 =
1457 (struct udfPartitionMap2 *)gpm;
1458 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1459 strlen(UDF_ID_VIRTUAL))) {
1461 le16_to_cpu(((__le16 *)upm2->partIdent.
1464 map->s_partition_type =
1466 map->s_partition_func =
1467 udf_get_pblock_virt15;
1469 map->s_partition_type =
1471 map->s_partition_func =
1472 udf_get_pblock_virt20;
1474 } else if (!strncmp(upm2->partIdent.ident,
1476 strlen(UDF_ID_SPARABLE))) {
1477 ret = udf_load_sparable_map(sb, map,
1478 (struct sparablePartitionMap *)gpm);
1481 } else if (!strncmp(upm2->partIdent.ident,
1483 strlen(UDF_ID_METADATA))) {
1484 struct udf_meta_data *mdata =
1485 &map->s_type_specific.s_metadata;
1486 struct metadataPartitionMap *mdm =
1487 (struct metadataPartitionMap *)
1488 &(lvd->partitionMaps[offset]);
1489 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1490 i, type, UDF_ID_METADATA);
1492 map->s_partition_type = UDF_METADATA_MAP25;
1493 map->s_partition_func = udf_get_pblock_meta25;
1495 mdata->s_meta_file_loc =
1496 le32_to_cpu(mdm->metadataFileLoc);
1497 mdata->s_mirror_file_loc =
1498 le32_to_cpu(mdm->metadataMirrorFileLoc);
1499 mdata->s_bitmap_file_loc =
1500 le32_to_cpu(mdm->metadataBitmapFileLoc);
1501 mdata->s_alloc_unit_size =
1502 le32_to_cpu(mdm->allocUnitSize);
1503 mdata->s_align_unit_size =
1504 le16_to_cpu(mdm->alignUnitSize);
1505 if (mdm->flags & 0x01)
1506 mdata->s_flags |= MF_DUPLICATE_MD;
1508 udf_debug("Metadata Ident suffix=0x%x\n",
1509 le16_to_cpu(*(__le16 *)
1510 mdm->partIdent.identSuffix));
1511 udf_debug("Metadata part num=%d\n",
1512 le16_to_cpu(mdm->partitionNum));
1513 udf_debug("Metadata part alloc unit size=%d\n",
1514 le32_to_cpu(mdm->allocUnitSize));
1515 udf_debug("Metadata file loc=%d\n",
1516 le32_to_cpu(mdm->metadataFileLoc));
1517 udf_debug("Mirror file loc=%d\n",
1518 le32_to_cpu(mdm->metadataMirrorFileLoc));
1519 udf_debug("Bitmap file loc=%d\n",
1520 le32_to_cpu(mdm->metadataBitmapFileLoc));
1521 udf_debug("Flags: %d %d\n",
1522 mdata->s_flags, mdm->flags);
1524 udf_debug("Unknown ident: %s\n",
1525 upm2->partIdent.ident);
1528 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1529 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1531 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1532 i, map->s_partition_num, type, map->s_volumeseqnum);
1536 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1538 *fileset = lelb_to_cpu(la->extLocation);
1539 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1540 fileset->logicalBlockNum,
1541 fileset->partitionReferenceNum);
1543 if (lvd->integritySeqExt.extLength)
1544 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1552 * udf_load_logicalvolint
1555 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1557 struct buffer_head *bh = NULL;
1559 struct udf_sb_info *sbi = UDF_SB(sb);
1560 struct logicalVolIntegrityDesc *lvid;
1562 while (loc.extLength > 0 &&
1563 (bh = udf_read_tagged(sb, loc.extLocation,
1564 loc.extLocation, &ident)) &&
1565 ident == TAG_IDENT_LVID) {
1566 sbi->s_lvid_bh = bh;
1567 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1569 if (lvid->nextIntegrityExt.extLength)
1570 udf_load_logicalvolint(sb,
1571 leea_to_cpu(lvid->nextIntegrityExt));
1573 if (sbi->s_lvid_bh != bh)
1575 loc.extLength -= sb->s_blocksize;
1578 if (sbi->s_lvid_bh != bh)
1583 * Process a main/reserve volume descriptor sequence.
1584 * @block First block of first extent of the sequence.
1585 * @lastblock Lastblock of first extent of the sequence.
1586 * @fileset There we store extent containing root fileset
1588 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1591 static noinline int udf_process_sequence(
1592 struct super_block *sb,
1593 sector_t block, sector_t lastblock,
1594 struct kernel_lb_addr *fileset)
1596 struct buffer_head *bh = NULL;
1597 struct udf_vds_record vds[VDS_POS_LENGTH];
1598 struct udf_vds_record *curr;
1599 struct generic_desc *gd;
1600 struct volDescPtr *vdp;
1604 long next_s = 0, next_e = 0;
1607 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1610 * Read the main descriptor sequence and find which descriptors
1613 for (; (!done && block <= lastblock); block++) {
1615 bh = udf_read_tagged(sb, block, block, &ident);
1618 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1619 (unsigned long long)block);
1623 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1624 gd = (struct generic_desc *)bh->b_data;
1625 vdsn = le32_to_cpu(gd->volDescSeqNum);
1627 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1628 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1629 if (vdsn >= curr->volDescSeqNum) {
1630 curr->volDescSeqNum = vdsn;
1631 curr->block = block;
1634 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1635 curr = &vds[VDS_POS_VOL_DESC_PTR];
1636 if (vdsn >= curr->volDescSeqNum) {
1637 curr->volDescSeqNum = vdsn;
1638 curr->block = block;
1640 vdp = (struct volDescPtr *)bh->b_data;
1641 next_s = le32_to_cpu(
1642 vdp->nextVolDescSeqExt.extLocation);
1643 next_e = le32_to_cpu(
1644 vdp->nextVolDescSeqExt.extLength);
1645 next_e = next_e >> sb->s_blocksize_bits;
1649 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1650 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1651 if (vdsn >= curr->volDescSeqNum) {
1652 curr->volDescSeqNum = vdsn;
1653 curr->block = block;
1656 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1657 curr = &vds[VDS_POS_PARTITION_DESC];
1659 curr->block = block;
1661 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1662 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1663 if (vdsn >= curr->volDescSeqNum) {
1664 curr->volDescSeqNum = vdsn;
1665 curr->block = block;
1668 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1669 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1670 if (vdsn >= curr->volDescSeqNum) {
1671 curr->volDescSeqNum = vdsn;
1672 curr->block = block;
1675 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1676 vds[VDS_POS_TERMINATING_DESC].block = block;
1680 next_s = next_e = 0;
1688 * Now read interesting descriptors again and process them
1689 * in a suitable order
1691 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1692 udf_err(sb, "Primary Volume Descriptor not found!\n");
1695 ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
1699 if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1700 ret = udf_load_logicalvol(sb,
1701 vds[VDS_POS_LOGICAL_VOL_DESC].block,
1707 if (vds[VDS_POS_PARTITION_DESC].block) {
1709 * We rescan the whole descriptor sequence to find
1710 * partition descriptor blocks and process them.
1712 for (block = vds[VDS_POS_PARTITION_DESC].block;
1713 block < vds[VDS_POS_TERMINATING_DESC].block;
1715 ret = udf_load_partdesc(sb, block);
1725 * Load Volume Descriptor Sequence described by anchor in bh
1727 * Returns <0 on error, 0 on success
1729 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1730 struct kernel_lb_addr *fileset)
1732 struct anchorVolDescPtr *anchor;
1733 sector_t main_s, main_e, reserve_s, reserve_e;
1736 anchor = (struct anchorVolDescPtr *)bh->b_data;
1738 /* Locate the main sequence */
1739 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1740 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1741 main_e = main_e >> sb->s_blocksize_bits;
1744 /* Locate the reserve sequence */
1745 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1746 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1747 reserve_e = reserve_e >> sb->s_blocksize_bits;
1748 reserve_e += reserve_s;
1750 /* Process the main & reserve sequences */
1751 /* responsible for finding the PartitionDesc(s) */
1752 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1755 udf_sb_free_partitions(sb);
1756 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1758 udf_sb_free_partitions(sb);
1759 /* No sequence was OK, return -EIO */
1767 * Check whether there is an anchor block in the given block and
1768 * load Volume Descriptor Sequence if so.
1770 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1773 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1774 struct kernel_lb_addr *fileset)
1776 struct buffer_head *bh;
1780 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1781 udf_fixed_to_variable(block) >=
1782 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1785 bh = udf_read_tagged(sb, block, block, &ident);
1788 if (ident != TAG_IDENT_AVDP) {
1792 ret = udf_load_sequence(sb, bh, fileset);
1798 * Search for an anchor volume descriptor pointer.
1800 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1803 static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1804 struct kernel_lb_addr *fileset)
1808 struct udf_sb_info *sbi = UDF_SB(sb);
1812 /* First try user provided anchor */
1813 if (sbi->s_anchor) {
1814 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1819 * according to spec, anchor is in either:
1823 * however, if the disc isn't closed, it could be 512.
1825 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1829 * The trouble is which block is the last one. Drives often misreport
1830 * this so we try various possibilities.
1832 last[last_count++] = *lastblock;
1833 if (*lastblock >= 1)
1834 last[last_count++] = *lastblock - 1;
1835 last[last_count++] = *lastblock + 1;
1836 if (*lastblock >= 2)
1837 last[last_count++] = *lastblock - 2;
1838 if (*lastblock >= 150)
1839 last[last_count++] = *lastblock - 150;
1840 if (*lastblock >= 152)
1841 last[last_count++] = *lastblock - 152;
1843 for (i = 0; i < last_count; i++) {
1844 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1845 sb->s_blocksize_bits)
1847 ret = udf_check_anchor_block(sb, last[i], fileset);
1848 if (ret != -EAGAIN) {
1850 *lastblock = last[i];
1855 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1856 if (ret != -EAGAIN) {
1858 *lastblock = last[i];
1863 /* Finally try block 512 in case media is open */
1864 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
1868 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1869 * area specified by it. The function expects sbi->s_lastblock to be the last
1870 * block on the media.
1872 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1875 static int udf_find_anchor(struct super_block *sb,
1876 struct kernel_lb_addr *fileset)
1878 struct udf_sb_info *sbi = UDF_SB(sb);
1879 sector_t lastblock = sbi->s_last_block;
1882 ret = udf_scan_anchors(sb, &lastblock, fileset);
1886 /* No anchor found? Try VARCONV conversion of block numbers */
1887 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1888 lastblock = udf_variable_to_fixed(sbi->s_last_block);
1889 /* Firstly, we try to not convert number of the last block */
1890 ret = udf_scan_anchors(sb, &lastblock, fileset);
1894 lastblock = sbi->s_last_block;
1895 /* Secondly, we try with converted number of the last block */
1896 ret = udf_scan_anchors(sb, &lastblock, fileset);
1898 /* VARCONV didn't help. Clear it. */
1899 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1903 sbi->s_last_block = lastblock;
1908 * Check Volume Structure Descriptor, find Anchor block and load Volume
1909 * Descriptor Sequence.
1911 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1912 * block was not found.
1914 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1915 int silent, struct kernel_lb_addr *fileset)
1917 struct udf_sb_info *sbi = UDF_SB(sb);
1921 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1923 udf_warn(sb, "Bad block size\n");
1926 sbi->s_last_block = uopt->lastblock;
1928 /* Check that it is NSR02 compliant */
1929 nsr_off = udf_check_vsd(sb);
1932 udf_warn(sb, "No VRS found\n");
1936 udf_debug("Failed to read sector at offset %d. "
1937 "Assuming open disc. Skipping validity "
1938 "check\n", VSD_FIRST_SECTOR_OFFSET);
1939 if (!sbi->s_last_block)
1940 sbi->s_last_block = udf_get_last_block(sb);
1942 udf_debug("Validity check skipped because of novrs option\n");
1945 /* Look for anchor block and load Volume Descriptor Sequence */
1946 sbi->s_anchor = uopt->anchor;
1947 ret = udf_find_anchor(sb, fileset);
1949 if (!silent && ret == -EAGAIN)
1950 udf_warn(sb, "No anchor found\n");
1956 static void udf_open_lvid(struct super_block *sb)
1958 struct udf_sb_info *sbi = UDF_SB(sb);
1959 struct buffer_head *bh = sbi->s_lvid_bh;
1960 struct logicalVolIntegrityDesc *lvid;
1961 struct logicalVolIntegrityDescImpUse *lvidiu;
1965 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1966 lvidiu = udf_sb_lvidiu(sb);
1970 mutex_lock(&sbi->s_alloc_mutex);
1971 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1972 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1973 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1975 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
1977 lvid->descTag.descCRC = cpu_to_le16(
1978 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1979 le16_to_cpu(lvid->descTag.descCRCLength)));
1981 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1982 mark_buffer_dirty(bh);
1983 sbi->s_lvid_dirty = 0;
1984 mutex_unlock(&sbi->s_alloc_mutex);
1985 /* Make opening of filesystem visible on the media immediately */
1986 sync_dirty_buffer(bh);
1989 static void udf_close_lvid(struct super_block *sb)
1991 struct udf_sb_info *sbi = UDF_SB(sb);
1992 struct buffer_head *bh = sbi->s_lvid_bh;
1993 struct logicalVolIntegrityDesc *lvid;
1994 struct logicalVolIntegrityDescImpUse *lvidiu;
1998 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1999 lvidiu = udf_sb_lvidiu(sb);
2003 mutex_lock(&sbi->s_alloc_mutex);
2004 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
2005 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
2006 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
2007 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
2008 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
2009 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
2010 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
2011 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
2012 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
2013 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
2015 lvid->descTag.descCRC = cpu_to_le16(
2016 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
2017 le16_to_cpu(lvid->descTag.descCRCLength)));
2019 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
2021 * We set buffer uptodate unconditionally here to avoid spurious
2022 * warnings from mark_buffer_dirty() when previous EIO has marked
2023 * the buffer as !uptodate
2025 set_buffer_uptodate(bh);
2026 mark_buffer_dirty(bh);
2027 sbi->s_lvid_dirty = 0;
2028 mutex_unlock(&sbi->s_alloc_mutex);
2029 /* Make closing of filesystem visible on the media immediately */
2030 sync_dirty_buffer(bh);
2033 u64 lvid_get_unique_id(struct super_block *sb)
2035 struct buffer_head *bh;
2036 struct udf_sb_info *sbi = UDF_SB(sb);
2037 struct logicalVolIntegrityDesc *lvid;
2038 struct logicalVolHeaderDesc *lvhd;
2042 bh = sbi->s_lvid_bh;
2046 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2047 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2049 mutex_lock(&sbi->s_alloc_mutex);
2050 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2051 if (!(++uniqueID & 0xFFFFFFFF))
2053 lvhd->uniqueID = cpu_to_le64(uniqueID);
2054 mutex_unlock(&sbi->s_alloc_mutex);
2055 mark_buffer_dirty(bh);
2060 static int udf_fill_super(struct super_block *sb, void *options, int silent)
2063 struct inode *inode = NULL;
2064 struct udf_options uopt;
2065 struct kernel_lb_addr rootdir, fileset;
2066 struct udf_sb_info *sbi;
2068 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
2069 uopt.uid = INVALID_UID;
2070 uopt.gid = INVALID_GID;
2072 uopt.fmode = UDF_INVALID_MODE;
2073 uopt.dmode = UDF_INVALID_MODE;
2075 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
2079 sb->s_fs_info = sbi;
2081 mutex_init(&sbi->s_alloc_mutex);
2083 if (!udf_parse_options((char *)options, &uopt, false))
2084 goto parse_options_failure;
2086 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
2087 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
2088 udf_err(sb, "utf8 cannot be combined with iocharset\n");
2089 goto parse_options_failure;
2091 #ifdef CONFIG_UDF_NLS
2092 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
2093 uopt.nls_map = load_nls_default();
2095 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2097 udf_debug("Using default NLS map\n");
2100 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2101 uopt.flags |= (1 << UDF_FLAG_UTF8);
2103 fileset.logicalBlockNum = 0xFFFFFFFF;
2104 fileset.partitionReferenceNum = 0xFFFF;
2106 sbi->s_flags = uopt.flags;
2107 sbi->s_uid = uopt.uid;
2108 sbi->s_gid = uopt.gid;
2109 sbi->s_umask = uopt.umask;
2110 sbi->s_fmode = uopt.fmode;
2111 sbi->s_dmode = uopt.dmode;
2112 sbi->s_nls_map = uopt.nls_map;
2113 rwlock_init(&sbi->s_cred_lock);
2115 if (uopt.session == 0xFFFFFFFF)
2116 sbi->s_session = udf_get_last_session(sb);
2118 sbi->s_session = uopt.session;
2120 udf_debug("Multi-session=%d\n", sbi->s_session);
2122 /* Fill in the rest of the superblock */
2123 sb->s_op = &udf_sb_ops;
2124 sb->s_export_op = &udf_export_ops;
2126 sb->s_magic = UDF_SUPER_MAGIC;
2127 sb->s_time_gran = 1000;
2129 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
2130 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2132 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
2133 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2134 if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
2136 pr_notice("Rescanning with blocksize %d\n",
2137 UDF_DEFAULT_BLOCKSIZE);
2138 brelse(sbi->s_lvid_bh);
2139 sbi->s_lvid_bh = NULL;
2140 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
2141 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2145 if (ret == -EAGAIN) {
2146 udf_warn(sb, "No partition found (1)\n");
2152 udf_debug("Lastblock=%d\n", sbi->s_last_block);
2154 if (sbi->s_lvid_bh) {
2155 struct logicalVolIntegrityDescImpUse *lvidiu =
2157 uint16_t minUDFReadRev;
2158 uint16_t minUDFWriteRev;
2164 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2165 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
2166 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
2167 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
2169 UDF_MAX_READ_VERSION);
2172 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2173 !(sb->s_flags & MS_RDONLY)) {
2178 sbi->s_udfrev = minUDFWriteRev;
2180 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2181 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2182 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2183 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2186 if (!sbi->s_partitions) {
2187 udf_warn(sb, "No partition found (2)\n");
2192 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2193 UDF_PART_FLAG_READ_ONLY &&
2194 !(sb->s_flags & MS_RDONLY)) {
2199 if (udf_find_fileset(sb, &fileset, &rootdir)) {
2200 udf_warn(sb, "No fileset found\n");
2206 struct timestamp ts;
2207 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2208 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2209 sbi->s_volume_ident,
2210 le16_to_cpu(ts.year), ts.month, ts.day,
2211 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2213 if (!(sb->s_flags & MS_RDONLY))
2216 /* Assign the root inode */
2217 /* assign inodes by physical block number */
2218 /* perhaps it's not extensible enough, but for now ... */
2219 inode = udf_iget(sb, &rootdir);
2220 if (IS_ERR(inode)) {
2221 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
2222 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2223 ret = PTR_ERR(inode);
2227 /* Allocate a dentry for the root inode */
2228 sb->s_root = d_make_root(inode);
2230 udf_err(sb, "Couldn't allocate root dentry\n");
2234 sb->s_maxbytes = MAX_LFS_FILESIZE;
2235 sb->s_max_links = UDF_MAX_LINKS;
2239 iput(sbi->s_vat_inode);
2240 parse_options_failure:
2241 #ifdef CONFIG_UDF_NLS
2242 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2243 unload_nls(sbi->s_nls_map);
2245 if (!(sb->s_flags & MS_RDONLY))
2247 brelse(sbi->s_lvid_bh);
2248 udf_sb_free_partitions(sb);
2250 sb->s_fs_info = NULL;
2255 void _udf_err(struct super_block *sb, const char *function,
2256 const char *fmt, ...)
2258 struct va_format vaf;
2261 va_start(args, fmt);
2266 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2271 void _udf_warn(struct super_block *sb, const char *function,
2272 const char *fmt, ...)
2274 struct va_format vaf;
2277 va_start(args, fmt);
2282 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2287 static void udf_put_super(struct super_block *sb)
2289 struct udf_sb_info *sbi;
2293 iput(sbi->s_vat_inode);
2294 #ifdef CONFIG_UDF_NLS
2295 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2296 unload_nls(sbi->s_nls_map);
2298 if (!(sb->s_flags & MS_RDONLY))
2300 brelse(sbi->s_lvid_bh);
2301 udf_sb_free_partitions(sb);
2302 mutex_destroy(&sbi->s_alloc_mutex);
2303 kfree(sb->s_fs_info);
2304 sb->s_fs_info = NULL;
2307 static int udf_sync_fs(struct super_block *sb, int wait)
2309 struct udf_sb_info *sbi = UDF_SB(sb);
2311 mutex_lock(&sbi->s_alloc_mutex);
2312 if (sbi->s_lvid_dirty) {
2314 * Blockdevice will be synced later so we don't have to submit
2317 mark_buffer_dirty(sbi->s_lvid_bh);
2318 sbi->s_lvid_dirty = 0;
2320 mutex_unlock(&sbi->s_alloc_mutex);
2325 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2327 struct super_block *sb = dentry->d_sb;
2328 struct udf_sb_info *sbi = UDF_SB(sb);
2329 struct logicalVolIntegrityDescImpUse *lvidiu;
2330 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2332 lvidiu = udf_sb_lvidiu(sb);
2333 buf->f_type = UDF_SUPER_MAGIC;
2334 buf->f_bsize = sb->s_blocksize;
2335 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2336 buf->f_bfree = udf_count_free(sb);
2337 buf->f_bavail = buf->f_bfree;
2338 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2339 le32_to_cpu(lvidiu->numDirs)) : 0)
2341 buf->f_ffree = buf->f_bfree;
2342 buf->f_namelen = UDF_NAME_LEN - 2;
2343 buf->f_fsid.val[0] = (u32)id;
2344 buf->f_fsid.val[1] = (u32)(id >> 32);
2349 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2350 struct udf_bitmap *bitmap)
2352 struct buffer_head *bh = NULL;
2353 unsigned int accum = 0;
2355 int block = 0, newblock;
2356 struct kernel_lb_addr loc;
2360 struct spaceBitmapDesc *bm;
2362 loc.logicalBlockNum = bitmap->s_extPosition;
2363 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2364 bh = udf_read_ptagged(sb, &loc, 0, &ident);
2367 udf_err(sb, "udf_count_free failed\n");
2369 } else if (ident != TAG_IDENT_SBD) {
2371 udf_err(sb, "udf_count_free failed\n");
2375 bm = (struct spaceBitmapDesc *)bh->b_data;
2376 bytes = le32_to_cpu(bm->numOfBytes);
2377 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2378 ptr = (uint8_t *)bh->b_data;
2381 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2382 accum += bitmap_weight((const unsigned long *)(ptr + index),
2387 newblock = udf_get_lb_pblock(sb, &loc, ++block);
2388 bh = udf_tread(sb, newblock);
2390 udf_debug("read failed\n");
2394 ptr = (uint8_t *)bh->b_data;
2402 static unsigned int udf_count_free_table(struct super_block *sb,
2403 struct inode *table)
2405 unsigned int accum = 0;
2407 struct kernel_lb_addr eloc;
2409 struct extent_position epos;
2411 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
2412 epos.block = UDF_I(table)->i_location;
2413 epos.offset = sizeof(struct unallocSpaceEntry);
2416 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2417 accum += (elen >> table->i_sb->s_blocksize_bits);
2420 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
2425 static unsigned int udf_count_free(struct super_block *sb)
2427 unsigned int accum = 0;
2428 struct udf_sb_info *sbi;
2429 struct udf_part_map *map;
2432 if (sbi->s_lvid_bh) {
2433 struct logicalVolIntegrityDesc *lvid =
2434 (struct logicalVolIntegrityDesc *)
2435 sbi->s_lvid_bh->b_data;
2436 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2437 accum = le32_to_cpu(
2438 lvid->freeSpaceTable[sbi->s_partition]);
2439 if (accum == 0xFFFFFFFF)
2447 map = &sbi->s_partmaps[sbi->s_partition];
2448 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2449 accum += udf_count_free_bitmap(sb,
2450 map->s_uspace.s_bitmap);
2452 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2453 accum += udf_count_free_bitmap(sb,
2454 map->s_fspace.s_bitmap);
2459 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2460 accum += udf_count_free_table(sb,
2461 map->s_uspace.s_table);
2463 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2464 accum += udf_count_free_table(sb,
2465 map->s_fspace.s_table);