5 * Super block routines for the OSTA-UDF(tm) filesystem.
8 * OSTA-UDF(tm) = Optical Storage Technology Association
9 * Universal Disk Format.
11 * This code is based on version 2.00 of the UDF specification,
12 * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346].
13 * http://www.osta.org/
18 * This file is distributed under the terms of the GNU General Public
19 * License (GPL). Copies of the GPL can be obtained from:
20 * ftp://prep.ai.mit.edu/pub/gnu/GPL
21 * Each contributing author retains all rights to their own work.
23 * (C) 1998 Dave Boynton
24 * (C) 1998-2004 Ben Fennema
25 * (C) 2000 Stelias Computing Inc
29 * 09/24/98 dgb changed to allow compiling outside of kernel, and
30 * added some debugging.
31 * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34
32 * 10/16/98 attempting some multi-session support
33 * 10/17/98 added freespace count for "df"
34 * 11/11/98 gr added novrs option
35 * 11/26/98 dgb added fileset,anchor mount options
36 * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced
37 * vol descs. rewrote option handling based on isofs
38 * 12/20/98 find the free space bitmap (if it exists)
43 #include <linux/blkdev.h>
44 #include <linux/slab.h>
45 #include <linux/kernel.h>
46 #include <linux/module.h>
47 #include <linux/parser.h>
48 #include <linux/stat.h>
49 #include <linux/cdrom.h>
50 #include <linux/nls.h>
51 #include <linux/buffer_head.h>
52 #include <linux/vfs.h>
53 #include <linux/vmalloc.h>
54 #include <linux/errno.h>
55 #include <linux/mount.h>
56 #include <linux/seq_file.h>
57 #include <linux/bitmap.h>
58 #include <linux/crc-itu-t.h>
59 #include <linux/log2.h>
60 #include <asm/byteorder.h>
65 #include <linux/init.h>
66 #include <asm/uaccess.h>
68 #define VDS_POS_PRIMARY_VOL_DESC 0
69 #define VDS_POS_UNALLOC_SPACE_DESC 1
70 #define VDS_POS_LOGICAL_VOL_DESC 2
71 #define VDS_POS_PARTITION_DESC 3
72 #define VDS_POS_IMP_USE_VOL_DESC 4
73 #define VDS_POS_VOL_DESC_PTR 5
74 #define VDS_POS_TERMINATING_DESC 6
75 #define VDS_POS_LENGTH 7
77 #define UDF_DEFAULT_BLOCKSIZE 2048
79 enum { UDF_MAX_LINKS = 0xffff };
81 /* These are the "meat" - everything else is stuffing */
82 static int udf_fill_super(struct super_block *, void *, int);
83 static void udf_put_super(struct super_block *);
84 static int udf_sync_fs(struct super_block *, int);
85 static int udf_remount_fs(struct super_block *, int *, char *);
86 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
87 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
88 struct kernel_lb_addr *);
89 static void udf_load_fileset(struct super_block *, struct buffer_head *,
90 struct kernel_lb_addr *);
91 static void udf_open_lvid(struct super_block *);
92 static void udf_close_lvid(struct super_block *);
93 static unsigned int udf_count_free(struct super_block *);
94 static int udf_statfs(struct dentry *, struct kstatfs *);
95 static int udf_show_options(struct seq_file *, struct dentry *);
97 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
99 struct logicalVolIntegrityDesc *lvid =
100 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
101 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
102 __u32 offset = number_of_partitions * 2 *
103 sizeof(uint32_t)/sizeof(uint8_t);
104 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
107 /* UDF filesystem type */
108 static struct dentry *udf_mount(struct file_system_type *fs_type,
109 int flags, const char *dev_name, void *data)
111 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
114 static struct file_system_type udf_fstype = {
115 .owner = THIS_MODULE,
118 .kill_sb = kill_block_super,
119 .fs_flags = FS_REQUIRES_DEV,
122 static struct kmem_cache *udf_inode_cachep;
124 static struct inode *udf_alloc_inode(struct super_block *sb)
126 struct udf_inode_info *ei;
127 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
132 ei->i_lenExtents = 0;
133 ei->i_next_alloc_block = 0;
134 ei->i_next_alloc_goal = 0;
136 init_rwsem(&ei->i_data_sem);
138 return &ei->vfs_inode;
141 static void udf_i_callback(struct rcu_head *head)
143 struct inode *inode = container_of(head, struct inode, i_rcu);
144 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
147 static void udf_destroy_inode(struct inode *inode)
149 call_rcu(&inode->i_rcu, udf_i_callback);
152 static void init_once(void *foo)
154 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
156 ei->i_ext.i_data = NULL;
157 inode_init_once(&ei->vfs_inode);
160 static int init_inodecache(void)
162 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
163 sizeof(struct udf_inode_info),
164 0, (SLAB_RECLAIM_ACCOUNT |
167 if (!udf_inode_cachep)
172 static void destroy_inodecache(void)
174 kmem_cache_destroy(udf_inode_cachep);
177 /* Superblock operations */
178 static const struct super_operations udf_sb_ops = {
179 .alloc_inode = udf_alloc_inode,
180 .destroy_inode = udf_destroy_inode,
181 .write_inode = udf_write_inode,
182 .evict_inode = udf_evict_inode,
183 .put_super = udf_put_super,
184 .sync_fs = udf_sync_fs,
185 .statfs = udf_statfs,
186 .remount_fs = udf_remount_fs,
187 .show_options = udf_show_options,
192 unsigned int blocksize;
193 unsigned int session;
194 unsigned int lastblock;
197 unsigned short partition;
198 unsigned int fileset;
199 unsigned int rootdir;
206 struct nls_table *nls_map;
209 static int __init init_udf_fs(void)
213 err = init_inodecache();
216 err = register_filesystem(&udf_fstype);
223 destroy_inodecache();
229 static void __exit exit_udf_fs(void)
231 unregister_filesystem(&udf_fstype);
232 destroy_inodecache();
235 module_init(init_udf_fs)
236 module_exit(exit_udf_fs)
238 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
240 struct udf_sb_info *sbi = UDF_SB(sb);
242 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
244 if (!sbi->s_partmaps) {
245 udf_err(sb, "Unable to allocate space for %d partition maps\n",
247 sbi->s_partitions = 0;
251 sbi->s_partitions = count;
255 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
258 int nr_groups = bitmap->s_nr_groups;
259 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
262 for (i = 0; i < nr_groups; i++)
263 if (bitmap->s_block_bitmap[i])
264 brelse(bitmap->s_block_bitmap[i]);
266 if (size <= PAGE_SIZE)
272 static void udf_free_partition(struct udf_part_map *map)
275 struct udf_meta_data *mdata;
277 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
278 iput(map->s_uspace.s_table);
279 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
280 iput(map->s_fspace.s_table);
281 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
282 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
283 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
284 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
285 if (map->s_partition_type == UDF_SPARABLE_MAP15)
286 for (i = 0; i < 4; i++)
287 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
288 else if (map->s_partition_type == UDF_METADATA_MAP25) {
289 mdata = &map->s_type_specific.s_metadata;
290 iput(mdata->s_metadata_fe);
291 mdata->s_metadata_fe = NULL;
293 iput(mdata->s_mirror_fe);
294 mdata->s_mirror_fe = NULL;
296 iput(mdata->s_bitmap_fe);
297 mdata->s_bitmap_fe = NULL;
301 static void udf_sb_free_partitions(struct super_block *sb)
303 struct udf_sb_info *sbi = UDF_SB(sb);
306 for (i = 0; i < sbi->s_partitions; i++)
307 udf_free_partition(&sbi->s_partmaps[i]);
308 kfree(sbi->s_partmaps);
309 sbi->s_partmaps = NULL;
312 static int udf_show_options(struct seq_file *seq, struct dentry *root)
314 struct super_block *sb = root->d_sb;
315 struct udf_sb_info *sbi = UDF_SB(sb);
317 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
318 seq_puts(seq, ",nostrict");
319 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
320 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
321 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
322 seq_puts(seq, ",unhide");
323 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
324 seq_puts(seq, ",undelete");
325 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
326 seq_puts(seq, ",noadinicb");
327 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
328 seq_puts(seq, ",shortad");
329 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
330 seq_puts(seq, ",uid=forget");
331 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
332 seq_puts(seq, ",uid=ignore");
333 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
334 seq_puts(seq, ",gid=forget");
335 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
336 seq_puts(seq, ",gid=ignore");
337 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
338 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
339 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
340 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
341 if (sbi->s_umask != 0)
342 seq_printf(seq, ",umask=%ho", sbi->s_umask);
343 if (sbi->s_fmode != UDF_INVALID_MODE)
344 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
345 if (sbi->s_dmode != UDF_INVALID_MODE)
346 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
347 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
348 seq_printf(seq, ",session=%u", sbi->s_session);
349 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
350 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
351 if (sbi->s_anchor != 0)
352 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
354 * volume, partition, fileset and rootdir seem to be ignored
357 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
358 seq_puts(seq, ",utf8");
359 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
360 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
369 * Parse mount options.
372 * The following mount options are supported:
374 * gid= Set the default group.
375 * umask= Set the default umask.
376 * mode= Set the default file permissions.
377 * dmode= Set the default directory permissions.
378 * uid= Set the default user.
379 * bs= Set the block size.
380 * unhide Show otherwise hidden files.
381 * undelete Show deleted files in lists.
382 * adinicb Embed data in the inode (default)
383 * noadinicb Don't embed data in the inode
384 * shortad Use short ad's
385 * longad Use long ad's (default)
386 * nostrict Unset strict conformance
387 * iocharset= Set the NLS character set
389 * The remaining are for debugging and disaster recovery:
391 * novrs Skip volume sequence recognition
393 * The following expect a offset from 0.
395 * session= Set the CDROM session (default= last session)
396 * anchor= Override standard anchor location. (default= 256)
397 * volume= Override the VolumeDesc location. (unused)
398 * partition= Override the PartitionDesc location. (unused)
399 * lastblock= Set the last block of the filesystem/
401 * The following expect a offset from the partition root.
403 * fileset= Override the fileset block location. (unused)
404 * rootdir= Override the root directory location. (unused)
405 * WARNING: overriding the rootdir to a non-directory may
406 * yield highly unpredictable results.
409 * options Pointer to mount options string.
410 * uopts Pointer to mount options variable.
413 * <return> 1 Mount options parsed okay.
414 * <return> 0 Error parsing mount options.
417 * July 1, 1997 - Andrew E. Mileski
418 * Written, tested, and released.
422 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
423 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
424 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
425 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
426 Opt_rootdir, Opt_utf8, Opt_iocharset,
427 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
431 static const match_table_t tokens = {
432 {Opt_novrs, "novrs"},
433 {Opt_nostrict, "nostrict"},
435 {Opt_unhide, "unhide"},
436 {Opt_undelete, "undelete"},
437 {Opt_noadinicb, "noadinicb"},
438 {Opt_adinicb, "adinicb"},
439 {Opt_shortad, "shortad"},
440 {Opt_longad, "longad"},
441 {Opt_uforget, "uid=forget"},
442 {Opt_uignore, "uid=ignore"},
443 {Opt_gforget, "gid=forget"},
444 {Opt_gignore, "gid=ignore"},
447 {Opt_umask, "umask=%o"},
448 {Opt_session, "session=%u"},
449 {Opt_lastblock, "lastblock=%u"},
450 {Opt_anchor, "anchor=%u"},
451 {Opt_volume, "volume=%u"},
452 {Opt_partition, "partition=%u"},
453 {Opt_fileset, "fileset=%u"},
454 {Opt_rootdir, "rootdir=%u"},
456 {Opt_iocharset, "iocharset=%s"},
457 {Opt_fmode, "mode=%o"},
458 {Opt_dmode, "dmode=%o"},
462 static int udf_parse_options(char *options, struct udf_options *uopt,
469 uopt->partition = 0xFFFF;
470 uopt->session = 0xFFFFFFFF;
473 uopt->volume = 0xFFFFFFFF;
474 uopt->rootdir = 0xFFFFFFFF;
475 uopt->fileset = 0xFFFFFFFF;
476 uopt->nls_map = NULL;
481 while ((p = strsep(&options, ",")) != NULL) {
482 substring_t args[MAX_OPT_ARGS];
487 token = match_token(p, tokens, args);
493 if (match_int(&args[0], &option))
495 uopt->blocksize = option;
496 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
499 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
502 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
505 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
508 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
511 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
514 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
517 if (match_int(args, &option))
519 uopt->gid = make_kgid(current_user_ns(), option);
520 if (!gid_valid(uopt->gid))
522 uopt->flags |= (1 << UDF_FLAG_GID_SET);
525 if (match_int(args, &option))
527 uopt->uid = make_kuid(current_user_ns(), option);
528 if (!uid_valid(uopt->uid))
530 uopt->flags |= (1 << UDF_FLAG_UID_SET);
533 if (match_octal(args, &option))
535 uopt->umask = option;
538 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
541 if (match_int(args, &option))
543 uopt->session = option;
545 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
548 if (match_int(args, &option))
550 uopt->lastblock = option;
552 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
555 if (match_int(args, &option))
557 uopt->anchor = option;
560 if (match_int(args, &option))
562 uopt->volume = option;
565 if (match_int(args, &option))
567 uopt->partition = option;
570 if (match_int(args, &option))
572 uopt->fileset = option;
575 if (match_int(args, &option))
577 uopt->rootdir = option;
580 uopt->flags |= (1 << UDF_FLAG_UTF8);
582 #ifdef CONFIG_UDF_NLS
584 uopt->nls_map = load_nls(args[0].from);
585 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
589 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
592 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
595 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
598 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
601 if (match_octal(args, &option))
603 uopt->fmode = option & 0777;
606 if (match_octal(args, &option))
608 uopt->dmode = option & 0777;
611 pr_err("bad mount option \"%s\" or missing value\n", p);
618 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
620 struct udf_options uopt;
621 struct udf_sb_info *sbi = UDF_SB(sb);
624 uopt.flags = sbi->s_flags;
625 uopt.uid = sbi->s_uid;
626 uopt.gid = sbi->s_gid;
627 uopt.umask = sbi->s_umask;
628 uopt.fmode = sbi->s_fmode;
629 uopt.dmode = sbi->s_dmode;
631 if (!udf_parse_options(options, &uopt, true))
634 write_lock(&sbi->s_cred_lock);
635 sbi->s_flags = uopt.flags;
636 sbi->s_uid = uopt.uid;
637 sbi->s_gid = uopt.gid;
638 sbi->s_umask = uopt.umask;
639 sbi->s_fmode = uopt.fmode;
640 sbi->s_dmode = uopt.dmode;
641 write_unlock(&sbi->s_cred_lock);
643 if (sbi->s_lvid_bh) {
644 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
645 if (write_rev > UDF_MAX_WRITE_VERSION)
649 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
652 if (*flags & MS_RDONLY)
661 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
662 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
663 static loff_t udf_check_vsd(struct super_block *sb)
665 struct volStructDesc *vsd = NULL;
666 loff_t sector = 32768;
668 struct buffer_head *bh = NULL;
671 struct udf_sb_info *sbi;
674 if (sb->s_blocksize < sizeof(struct volStructDesc))
675 sectorsize = sizeof(struct volStructDesc);
677 sectorsize = sb->s_blocksize;
679 sector += (sbi->s_session << sb->s_blocksize_bits);
681 udf_debug("Starting at sector %u (%ld byte sectors)\n",
682 (unsigned int)(sector >> sb->s_blocksize_bits),
684 /* Process the sequence (if applicable) */
685 for (; !nsr02 && !nsr03; sector += sectorsize) {
687 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
691 /* Look for ISO descriptors */
692 vsd = (struct volStructDesc *)(bh->b_data +
693 (sector & (sb->s_blocksize - 1)));
695 if (vsd->stdIdent[0] == 0) {
698 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
700 switch (vsd->structType) {
702 udf_debug("ISO9660 Boot Record found\n");
705 udf_debug("ISO9660 Primary Volume Descriptor found\n");
708 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
711 udf_debug("ISO9660 Volume Partition Descriptor found\n");
714 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
717 udf_debug("ISO9660 VRS (%u) found\n",
721 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
724 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
728 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
731 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
741 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
747 static int udf_find_fileset(struct super_block *sb,
748 struct kernel_lb_addr *fileset,
749 struct kernel_lb_addr *root)
751 struct buffer_head *bh = NULL;
754 struct udf_sb_info *sbi;
756 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
757 fileset->partitionReferenceNum != 0xFFFF) {
758 bh = udf_read_ptagged(sb, fileset, 0, &ident);
762 } else if (ident != TAG_IDENT_FSD) {
771 /* Search backwards through the partitions */
772 struct kernel_lb_addr newfileset;
774 /* --> cvg: FIXME - is it reasonable? */
777 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
778 (newfileset.partitionReferenceNum != 0xFFFF &&
779 fileset->logicalBlockNum == 0xFFFFFFFF &&
780 fileset->partitionReferenceNum == 0xFFFF);
781 newfileset.partitionReferenceNum--) {
782 lastblock = sbi->s_partmaps
783 [newfileset.partitionReferenceNum]
785 newfileset.logicalBlockNum = 0;
788 bh = udf_read_ptagged(sb, &newfileset, 0,
791 newfileset.logicalBlockNum++;
798 struct spaceBitmapDesc *sp;
799 sp = (struct spaceBitmapDesc *)
801 newfileset.logicalBlockNum += 1 +
802 ((le32_to_cpu(sp->numOfBytes) +
803 sizeof(struct spaceBitmapDesc)
804 - 1) >> sb->s_blocksize_bits);
809 *fileset = newfileset;
812 newfileset.logicalBlockNum++;
817 } while (newfileset.logicalBlockNum < lastblock &&
818 fileset->logicalBlockNum == 0xFFFFFFFF &&
819 fileset->partitionReferenceNum == 0xFFFF);
823 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
824 fileset->partitionReferenceNum != 0xFFFF) && bh) {
825 udf_debug("Fileset at block=%d, partition=%d\n",
826 fileset->logicalBlockNum,
827 fileset->partitionReferenceNum);
829 sbi->s_partition = fileset->partitionReferenceNum;
830 udf_load_fileset(sb, bh, root);
837 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
839 struct primaryVolDesc *pvoldesc;
840 struct ustr *instr, *outstr;
841 struct buffer_head *bh;
845 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
849 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
853 bh = udf_read_tagged(sb, block, block, &ident);
857 BUG_ON(ident != TAG_IDENT_PVD);
859 pvoldesc = (struct primaryVolDesc *)bh->b_data;
861 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
862 pvoldesc->recordingDateAndTime)) {
864 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
865 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
866 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
867 ts->minute, le16_to_cpu(ts->typeAndTimezone));
871 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
872 if (udf_CS0toUTF8(outstr, instr)) {
873 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
874 outstr->u_len > 31 ? 31 : outstr->u_len);
875 udf_debug("volIdent[] = '%s'\n",
876 UDF_SB(sb)->s_volume_ident);
879 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
880 if (udf_CS0toUTF8(outstr, instr))
881 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
892 struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
893 u32 meta_file_loc, u32 partition_num)
895 struct kernel_lb_addr addr;
896 struct inode *metadata_fe;
898 addr.logicalBlockNum = meta_file_loc;
899 addr.partitionReferenceNum = partition_num;
901 metadata_fe = udf_iget(sb, &addr);
903 if (metadata_fe == NULL)
904 udf_warn(sb, "metadata inode efe not found\n");
905 else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
906 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
914 static int udf_load_metadata_files(struct super_block *sb, int partition)
916 struct udf_sb_info *sbi = UDF_SB(sb);
917 struct udf_part_map *map;
918 struct udf_meta_data *mdata;
919 struct kernel_lb_addr addr;
921 map = &sbi->s_partmaps[partition];
922 mdata = &map->s_type_specific.s_metadata;
924 /* metadata address */
925 udf_debug("Metadata file location: block = %d part = %d\n",
926 mdata->s_meta_file_loc, map->s_partition_num);
928 mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb,
929 mdata->s_meta_file_loc, map->s_partition_num);
931 if (mdata->s_metadata_fe == NULL) {
932 /* mirror file entry */
933 udf_debug("Mirror metadata file location: block = %d part = %d\n",
934 mdata->s_mirror_file_loc, map->s_partition_num);
936 mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
937 mdata->s_mirror_file_loc, map->s_partition_num);
939 if (mdata->s_mirror_fe == NULL) {
940 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
948 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
950 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
951 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
952 addr.partitionReferenceNum = map->s_partition_num;
954 udf_debug("Bitmap file location: block = %d part = %d\n",
955 addr.logicalBlockNum, addr.partitionReferenceNum);
957 mdata->s_bitmap_fe = udf_iget(sb, &addr);
959 if (mdata->s_bitmap_fe == NULL) {
960 if (sb->s_flags & MS_RDONLY)
961 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
963 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
969 udf_debug("udf_load_metadata_files Ok\n");
977 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
978 struct kernel_lb_addr *root)
980 struct fileSetDesc *fset;
982 fset = (struct fileSetDesc *)bh->b_data;
984 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
986 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
988 udf_debug("Rootdir at block=%d, partition=%d\n",
989 root->logicalBlockNum, root->partitionReferenceNum);
992 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
994 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
995 return DIV_ROUND_UP(map->s_partition_len +
996 (sizeof(struct spaceBitmapDesc) << 3),
997 sb->s_blocksize * 8);
1000 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1002 struct udf_bitmap *bitmap;
1006 nr_groups = udf_compute_nr_groups(sb, index);
1007 size = sizeof(struct udf_bitmap) +
1008 (sizeof(struct buffer_head *) * nr_groups);
1010 if (size <= PAGE_SIZE)
1011 bitmap = kzalloc(size, GFP_KERNEL);
1013 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
1018 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
1019 bitmap->s_nr_groups = nr_groups;
1023 static int udf_fill_partdesc_info(struct super_block *sb,
1024 struct partitionDesc *p, int p_index)
1026 struct udf_part_map *map;
1027 struct udf_sb_info *sbi = UDF_SB(sb);
1028 struct partitionHeaderDesc *phd;
1030 map = &sbi->s_partmaps[p_index];
1032 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1033 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1035 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1036 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1037 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1038 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1039 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1040 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1041 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1042 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1044 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1045 p_index, map->s_partition_type,
1046 map->s_partition_root, map->s_partition_len);
1048 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1049 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1052 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1053 if (phd->unallocSpaceTable.extLength) {
1054 struct kernel_lb_addr loc = {
1055 .logicalBlockNum = le32_to_cpu(
1056 phd->unallocSpaceTable.extPosition),
1057 .partitionReferenceNum = p_index,
1060 map->s_uspace.s_table = udf_iget(sb, &loc);
1061 if (!map->s_uspace.s_table) {
1062 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1066 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1067 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1068 p_index, map->s_uspace.s_table->i_ino);
1071 if (phd->unallocSpaceBitmap.extLength) {
1072 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1075 map->s_uspace.s_bitmap = bitmap;
1076 bitmap->s_extLength = le32_to_cpu(
1077 phd->unallocSpaceBitmap.extLength);
1078 bitmap->s_extPosition = le32_to_cpu(
1079 phd->unallocSpaceBitmap.extPosition);
1080 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1081 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1082 p_index, bitmap->s_extPosition);
1085 if (phd->partitionIntegrityTable.extLength)
1086 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1088 if (phd->freedSpaceTable.extLength) {
1089 struct kernel_lb_addr loc = {
1090 .logicalBlockNum = le32_to_cpu(
1091 phd->freedSpaceTable.extPosition),
1092 .partitionReferenceNum = p_index,
1095 map->s_fspace.s_table = udf_iget(sb, &loc);
1096 if (!map->s_fspace.s_table) {
1097 udf_debug("cannot load freedSpaceTable (part %d)\n",
1102 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1103 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1104 p_index, map->s_fspace.s_table->i_ino);
1107 if (phd->freedSpaceBitmap.extLength) {
1108 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1111 map->s_fspace.s_bitmap = bitmap;
1112 bitmap->s_extLength = le32_to_cpu(
1113 phd->freedSpaceBitmap.extLength);
1114 bitmap->s_extPosition = le32_to_cpu(
1115 phd->freedSpaceBitmap.extPosition);
1116 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1117 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1118 p_index, bitmap->s_extPosition);
1123 static void udf_find_vat_block(struct super_block *sb, int p_index,
1124 int type1_index, sector_t start_block)
1126 struct udf_sb_info *sbi = UDF_SB(sb);
1127 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1129 struct kernel_lb_addr ino;
1132 * VAT file entry is in the last recorded block. Some broken disks have
1133 * it a few blocks before so try a bit harder...
1135 ino.partitionReferenceNum = type1_index;
1136 for (vat_block = start_block;
1137 vat_block >= map->s_partition_root &&
1138 vat_block >= start_block - 3 &&
1139 !sbi->s_vat_inode; vat_block--) {
1140 ino.logicalBlockNum = vat_block - map->s_partition_root;
1141 sbi->s_vat_inode = udf_iget(sb, &ino);
1145 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1147 struct udf_sb_info *sbi = UDF_SB(sb);
1148 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1149 struct buffer_head *bh = NULL;
1150 struct udf_inode_info *vati;
1152 struct virtualAllocationTable20 *vat20;
1153 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
1155 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
1156 if (!sbi->s_vat_inode &&
1157 sbi->s_last_block != blocks - 1) {
1158 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1159 (unsigned long)sbi->s_last_block,
1160 (unsigned long)blocks - 1);
1161 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
1163 if (!sbi->s_vat_inode)
1166 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1167 map->s_type_specific.s_virtual.s_start_offset = 0;
1168 map->s_type_specific.s_virtual.s_num_entries =
1169 (sbi->s_vat_inode->i_size - 36) >> 2;
1170 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1171 vati = UDF_I(sbi->s_vat_inode);
1172 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1173 pos = udf_block_map(sbi->s_vat_inode, 0);
1174 bh = sb_bread(sb, pos);
1177 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1179 vat20 = (struct virtualAllocationTable20 *)
1183 map->s_type_specific.s_virtual.s_start_offset =
1184 le16_to_cpu(vat20->lengthHeader);
1185 map->s_type_specific.s_virtual.s_num_entries =
1186 (sbi->s_vat_inode->i_size -
1187 map->s_type_specific.s_virtual.
1188 s_start_offset) >> 2;
1194 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1196 struct buffer_head *bh;
1197 struct partitionDesc *p;
1198 struct udf_part_map *map;
1199 struct udf_sb_info *sbi = UDF_SB(sb);
1201 uint16_t partitionNumber;
1205 bh = udf_read_tagged(sb, block, block, &ident);
1208 if (ident != TAG_IDENT_PD)
1211 p = (struct partitionDesc *)bh->b_data;
1212 partitionNumber = le16_to_cpu(p->partitionNumber);
1214 /* First scan for TYPE1, SPARABLE and METADATA partitions */
1215 for (i = 0; i < sbi->s_partitions; i++) {
1216 map = &sbi->s_partmaps[i];
1217 udf_debug("Searching map: (%d == %d)\n",
1218 map->s_partition_num, partitionNumber);
1219 if (map->s_partition_num == partitionNumber &&
1220 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1221 map->s_partition_type == UDF_SPARABLE_MAP15))
1225 if (i >= sbi->s_partitions) {
1226 udf_debug("Partition (%d) not found in partition map\n",
1231 ret = udf_fill_partdesc_info(sb, p, i);
1234 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1235 * PHYSICAL partitions are already set up
1238 for (i = 0; i < sbi->s_partitions; i++) {
1239 map = &sbi->s_partmaps[i];
1241 if (map->s_partition_num == partitionNumber &&
1242 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1243 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1244 map->s_partition_type == UDF_METADATA_MAP25))
1248 if (i >= sbi->s_partitions)
1251 ret = udf_fill_partdesc_info(sb, p, i);
1255 if (map->s_partition_type == UDF_METADATA_MAP25) {
1256 ret = udf_load_metadata_files(sb, i);
1258 udf_err(sb, "error loading MetaData partition map %d\n",
1263 ret = udf_load_vat(sb, i, type1_idx);
1267 * Mark filesystem read-only if we have a partition with
1268 * virtual map since we don't handle writing to it (we
1269 * overwrite blocks instead of relocating them).
1271 sb->s_flags |= MS_RDONLY;
1272 pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n");
1275 /* In case loading failed, we handle cleanup in udf_fill_super */
1280 static int udf_load_sparable_map(struct super_block *sb,
1281 struct udf_part_map *map,
1282 struct sparablePartitionMap *spm)
1286 struct sparingTable *st;
1287 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1289 struct buffer_head *bh;
1291 map->s_partition_type = UDF_SPARABLE_MAP15;
1292 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1293 if (!is_power_of_2(sdata->s_packet_len)) {
1294 udf_err(sb, "error loading logical volume descriptor: "
1295 "Invalid packet length %u\n",
1296 (unsigned)sdata->s_packet_len);
1299 if (spm->numSparingTables > 4) {
1300 udf_err(sb, "error loading logical volume descriptor: "
1301 "Too many sparing tables (%d)\n",
1302 (int)spm->numSparingTables);
1306 for (i = 0; i < spm->numSparingTables; i++) {
1307 loc = le32_to_cpu(spm->locSparingTable[i]);
1308 bh = udf_read_tagged(sb, loc, loc, &ident);
1312 st = (struct sparingTable *)bh->b_data;
1314 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1315 strlen(UDF_ID_SPARING)) ||
1316 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1322 sdata->s_spar_map[i] = bh;
1324 map->s_partition_func = udf_get_pblock_spar15;
1328 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1329 struct kernel_lb_addr *fileset)
1331 struct logicalVolDesc *lvd;
1334 struct udf_sb_info *sbi = UDF_SB(sb);
1335 struct genericPartitionMap *gpm;
1337 struct buffer_head *bh;
1338 unsigned int table_len;
1341 bh = udf_read_tagged(sb, block, block, &ident);
1344 BUG_ON(ident != TAG_IDENT_LVD);
1345 lvd = (struct logicalVolDesc *)bh->b_data;
1346 table_len = le32_to_cpu(lvd->mapTableLength);
1347 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
1348 udf_err(sb, "error loading logical volume descriptor: "
1349 "Partition table too long (%u > %lu)\n", table_len,
1350 sb->s_blocksize - sizeof(*lvd));
1355 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1359 for (i = 0, offset = 0;
1360 i < sbi->s_partitions && offset < table_len;
1361 i++, offset += gpm->partitionMapLength) {
1362 struct udf_part_map *map = &sbi->s_partmaps[i];
1363 gpm = (struct genericPartitionMap *)
1364 &(lvd->partitionMaps[offset]);
1365 type = gpm->partitionMapType;
1367 struct genericPartitionMap1 *gpm1 =
1368 (struct genericPartitionMap1 *)gpm;
1369 map->s_partition_type = UDF_TYPE1_MAP15;
1370 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1371 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1372 map->s_partition_func = NULL;
1373 } else if (type == 2) {
1374 struct udfPartitionMap2 *upm2 =
1375 (struct udfPartitionMap2 *)gpm;
1376 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1377 strlen(UDF_ID_VIRTUAL))) {
1379 le16_to_cpu(((__le16 *)upm2->partIdent.
1382 map->s_partition_type =
1384 map->s_partition_func =
1385 udf_get_pblock_virt15;
1387 map->s_partition_type =
1389 map->s_partition_func =
1390 udf_get_pblock_virt20;
1392 } else if (!strncmp(upm2->partIdent.ident,
1394 strlen(UDF_ID_SPARABLE))) {
1395 if (udf_load_sparable_map(sb, map,
1396 (struct sparablePartitionMap *)gpm) < 0) {
1400 } else if (!strncmp(upm2->partIdent.ident,
1402 strlen(UDF_ID_METADATA))) {
1403 struct udf_meta_data *mdata =
1404 &map->s_type_specific.s_metadata;
1405 struct metadataPartitionMap *mdm =
1406 (struct metadataPartitionMap *)
1407 &(lvd->partitionMaps[offset]);
1408 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1409 i, type, UDF_ID_METADATA);
1411 map->s_partition_type = UDF_METADATA_MAP25;
1412 map->s_partition_func = udf_get_pblock_meta25;
1414 mdata->s_meta_file_loc =
1415 le32_to_cpu(mdm->metadataFileLoc);
1416 mdata->s_mirror_file_loc =
1417 le32_to_cpu(mdm->metadataMirrorFileLoc);
1418 mdata->s_bitmap_file_loc =
1419 le32_to_cpu(mdm->metadataBitmapFileLoc);
1420 mdata->s_alloc_unit_size =
1421 le32_to_cpu(mdm->allocUnitSize);
1422 mdata->s_align_unit_size =
1423 le16_to_cpu(mdm->alignUnitSize);
1424 if (mdm->flags & 0x01)
1425 mdata->s_flags |= MF_DUPLICATE_MD;
1427 udf_debug("Metadata Ident suffix=0x%x\n",
1428 le16_to_cpu(*(__le16 *)
1429 mdm->partIdent.identSuffix));
1430 udf_debug("Metadata part num=%d\n",
1431 le16_to_cpu(mdm->partitionNum));
1432 udf_debug("Metadata part alloc unit size=%d\n",
1433 le32_to_cpu(mdm->allocUnitSize));
1434 udf_debug("Metadata file loc=%d\n",
1435 le32_to_cpu(mdm->metadataFileLoc));
1436 udf_debug("Mirror file loc=%d\n",
1437 le32_to_cpu(mdm->metadataMirrorFileLoc));
1438 udf_debug("Bitmap file loc=%d\n",
1439 le32_to_cpu(mdm->metadataBitmapFileLoc));
1440 udf_debug("Flags: %d %d\n",
1441 mdata->s_flags, mdm->flags);
1443 udf_debug("Unknown ident: %s\n",
1444 upm2->partIdent.ident);
1447 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1448 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1450 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1451 i, map->s_partition_num, type, map->s_volumeseqnum);
1455 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1457 *fileset = lelb_to_cpu(la->extLocation);
1458 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1459 fileset->logicalBlockNum,
1460 fileset->partitionReferenceNum);
1462 if (lvd->integritySeqExt.extLength)
1463 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1471 * udf_load_logicalvolint
1474 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1476 struct buffer_head *bh = NULL;
1478 struct udf_sb_info *sbi = UDF_SB(sb);
1479 struct logicalVolIntegrityDesc *lvid;
1481 while (loc.extLength > 0 &&
1482 (bh = udf_read_tagged(sb, loc.extLocation,
1483 loc.extLocation, &ident)) &&
1484 ident == TAG_IDENT_LVID) {
1485 sbi->s_lvid_bh = bh;
1486 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1488 if (lvid->nextIntegrityExt.extLength)
1489 udf_load_logicalvolint(sb,
1490 leea_to_cpu(lvid->nextIntegrityExt));
1492 if (sbi->s_lvid_bh != bh)
1494 loc.extLength -= sb->s_blocksize;
1497 if (sbi->s_lvid_bh != bh)
1502 * udf_process_sequence
1505 * Process a main/reserve volume descriptor sequence.
1508 * sb Pointer to _locked_ superblock.
1509 * block First block of first extent of the sequence.
1510 * lastblock Lastblock of first extent of the sequence.
1513 * July 1, 1997 - Andrew E. Mileski
1514 * Written, tested, and released.
1516 static noinline int udf_process_sequence(struct super_block *sb, long block,
1517 long lastblock, struct kernel_lb_addr *fileset)
1519 struct buffer_head *bh = NULL;
1520 struct udf_vds_record vds[VDS_POS_LENGTH];
1521 struct udf_vds_record *curr;
1522 struct generic_desc *gd;
1523 struct volDescPtr *vdp;
1527 long next_s = 0, next_e = 0;
1529 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1532 * Read the main descriptor sequence and find which descriptors
1535 for (; (!done && block <= lastblock); block++) {
1537 bh = udf_read_tagged(sb, block, block, &ident);
1540 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1541 (unsigned long long)block);
1545 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1546 gd = (struct generic_desc *)bh->b_data;
1547 vdsn = le32_to_cpu(gd->volDescSeqNum);
1549 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1550 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1551 if (vdsn >= curr->volDescSeqNum) {
1552 curr->volDescSeqNum = vdsn;
1553 curr->block = block;
1556 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1557 curr = &vds[VDS_POS_VOL_DESC_PTR];
1558 if (vdsn >= curr->volDescSeqNum) {
1559 curr->volDescSeqNum = vdsn;
1560 curr->block = block;
1562 vdp = (struct volDescPtr *)bh->b_data;
1563 next_s = le32_to_cpu(
1564 vdp->nextVolDescSeqExt.extLocation);
1565 next_e = le32_to_cpu(
1566 vdp->nextVolDescSeqExt.extLength);
1567 next_e = next_e >> sb->s_blocksize_bits;
1571 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1572 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1573 if (vdsn >= curr->volDescSeqNum) {
1574 curr->volDescSeqNum = vdsn;
1575 curr->block = block;
1578 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1579 curr = &vds[VDS_POS_PARTITION_DESC];
1581 curr->block = block;
1583 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1584 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1585 if (vdsn >= curr->volDescSeqNum) {
1586 curr->volDescSeqNum = vdsn;
1587 curr->block = block;
1590 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1591 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1592 if (vdsn >= curr->volDescSeqNum) {
1593 curr->volDescSeqNum = vdsn;
1594 curr->block = block;
1597 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1598 vds[VDS_POS_TERMINATING_DESC].block = block;
1602 next_s = next_e = 0;
1610 * Now read interesting descriptors again and process them
1611 * in a suitable order
1613 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1614 udf_err(sb, "Primary Volume Descriptor not found!\n");
1617 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1620 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1621 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1624 if (vds[VDS_POS_PARTITION_DESC].block) {
1626 * We rescan the whole descriptor sequence to find
1627 * partition descriptor blocks and process them.
1629 for (block = vds[VDS_POS_PARTITION_DESC].block;
1630 block < vds[VDS_POS_TERMINATING_DESC].block;
1632 if (udf_load_partdesc(sb, block))
1639 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1640 struct kernel_lb_addr *fileset)
1642 struct anchorVolDescPtr *anchor;
1643 long main_s, main_e, reserve_s, reserve_e;
1645 anchor = (struct anchorVolDescPtr *)bh->b_data;
1647 /* Locate the main sequence */
1648 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1649 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1650 main_e = main_e >> sb->s_blocksize_bits;
1653 /* Locate the reserve sequence */
1654 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1655 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1656 reserve_e = reserve_e >> sb->s_blocksize_bits;
1657 reserve_e += reserve_s;
1659 /* Process the main & reserve sequences */
1660 /* responsible for finding the PartitionDesc(s) */
1661 if (!udf_process_sequence(sb, main_s, main_e, fileset))
1663 udf_sb_free_partitions(sb);
1664 if (!udf_process_sequence(sb, reserve_s, reserve_e, fileset))
1666 udf_sb_free_partitions(sb);
1671 * Check whether there is an anchor block in the given block and
1672 * load Volume Descriptor Sequence if so.
1674 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1675 struct kernel_lb_addr *fileset)
1677 struct buffer_head *bh;
1681 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1682 udf_fixed_to_variable(block) >=
1683 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1686 bh = udf_read_tagged(sb, block, block, &ident);
1689 if (ident != TAG_IDENT_AVDP) {
1693 ret = udf_load_sequence(sb, bh, fileset);
1698 /* Search for an anchor volume descriptor pointer */
1699 static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
1700 struct kernel_lb_addr *fileset)
1704 struct udf_sb_info *sbi = UDF_SB(sb);
1707 /* First try user provided anchor */
1708 if (sbi->s_anchor) {
1709 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
1713 * according to spec, anchor is in either:
1717 * however, if the disc isn't closed, it could be 512.
1719 if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
1722 * The trouble is which block is the last one. Drives often misreport
1723 * this so we try various possibilities.
1725 last[last_count++] = lastblock;
1727 last[last_count++] = lastblock - 1;
1728 last[last_count++] = lastblock + 1;
1730 last[last_count++] = lastblock - 2;
1731 if (lastblock >= 150)
1732 last[last_count++] = lastblock - 150;
1733 if (lastblock >= 152)
1734 last[last_count++] = lastblock - 152;
1736 for (i = 0; i < last_count; i++) {
1737 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1738 sb->s_blocksize_bits)
1740 if (udf_check_anchor_block(sb, last[i], fileset))
1744 if (udf_check_anchor_block(sb, last[i] - 256, fileset))
1748 /* Finally try block 512 in case media is open */
1749 if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
1755 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1756 * area specified by it. The function expects sbi->s_lastblock to be the last
1757 * block on the media.
1759 * Return 1 if ok, 0 if not found.
1762 static int udf_find_anchor(struct super_block *sb,
1763 struct kernel_lb_addr *fileset)
1766 struct udf_sb_info *sbi = UDF_SB(sb);
1768 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1772 /* No anchor found? Try VARCONV conversion of block numbers */
1773 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1774 /* Firstly, we try to not convert number of the last block */
1775 lastblock = udf_scan_anchors(sb,
1776 udf_variable_to_fixed(sbi->s_last_block),
1781 /* Secondly, we try with converted number of the last block */
1782 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1784 /* VARCONV didn't help. Clear it. */
1785 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1789 sbi->s_last_block = lastblock;
1794 * Check Volume Structure Descriptor, find Anchor block and load Volume
1795 * Descriptor Sequence
1797 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1798 int silent, struct kernel_lb_addr *fileset)
1800 struct udf_sb_info *sbi = UDF_SB(sb);
1803 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1805 udf_warn(sb, "Bad block size\n");
1808 sbi->s_last_block = uopt->lastblock;
1810 /* Check that it is NSR02 compliant */
1811 nsr_off = udf_check_vsd(sb);
1814 udf_warn(sb, "No VRS found\n");
1818 udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n");
1819 if (!sbi->s_last_block)
1820 sbi->s_last_block = udf_get_last_block(sb);
1822 udf_debug("Validity check skipped because of novrs option\n");
1825 /* Look for anchor block and load Volume Descriptor Sequence */
1826 sbi->s_anchor = uopt->anchor;
1827 if (!udf_find_anchor(sb, fileset)) {
1829 udf_warn(sb, "No anchor found\n");
1835 static void udf_open_lvid(struct super_block *sb)
1837 struct udf_sb_info *sbi = UDF_SB(sb);
1838 struct buffer_head *bh = sbi->s_lvid_bh;
1839 struct logicalVolIntegrityDesc *lvid;
1840 struct logicalVolIntegrityDescImpUse *lvidiu;
1845 mutex_lock(&sbi->s_alloc_mutex);
1846 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1847 lvidiu = udf_sb_lvidiu(sbi);
1849 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1850 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1851 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1853 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
1855 lvid->descTag.descCRC = cpu_to_le16(
1856 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1857 le16_to_cpu(lvid->descTag.descCRCLength)));
1859 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1860 mark_buffer_dirty(bh);
1861 sbi->s_lvid_dirty = 0;
1862 mutex_unlock(&sbi->s_alloc_mutex);
1865 static void udf_close_lvid(struct super_block *sb)
1867 struct udf_sb_info *sbi = UDF_SB(sb);
1868 struct buffer_head *bh = sbi->s_lvid_bh;
1869 struct logicalVolIntegrityDesc *lvid;
1870 struct logicalVolIntegrityDescImpUse *lvidiu;
1875 mutex_lock(&sbi->s_alloc_mutex);
1876 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1877 lvidiu = udf_sb_lvidiu(sbi);
1878 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1879 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1880 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1881 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1882 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1883 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1884 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1885 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1886 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1887 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1889 lvid->descTag.descCRC = cpu_to_le16(
1890 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1891 le16_to_cpu(lvid->descTag.descCRCLength)));
1893 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1895 * We set buffer uptodate unconditionally here to avoid spurious
1896 * warnings from mark_buffer_dirty() when previous EIO has marked
1897 * the buffer as !uptodate
1899 set_buffer_uptodate(bh);
1900 mark_buffer_dirty(bh);
1901 sbi->s_lvid_dirty = 0;
1902 mutex_unlock(&sbi->s_alloc_mutex);
1905 u64 lvid_get_unique_id(struct super_block *sb)
1907 struct buffer_head *bh;
1908 struct udf_sb_info *sbi = UDF_SB(sb);
1909 struct logicalVolIntegrityDesc *lvid;
1910 struct logicalVolHeaderDesc *lvhd;
1914 bh = sbi->s_lvid_bh;
1918 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1919 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
1921 mutex_lock(&sbi->s_alloc_mutex);
1922 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
1923 if (!(++uniqueID & 0xFFFFFFFF))
1925 lvhd->uniqueID = cpu_to_le64(uniqueID);
1926 mutex_unlock(&sbi->s_alloc_mutex);
1927 mark_buffer_dirty(bh);
1932 static int udf_fill_super(struct super_block *sb, void *options, int silent)
1935 struct inode *inode = NULL;
1936 struct udf_options uopt;
1937 struct kernel_lb_addr rootdir, fileset;
1938 struct udf_sb_info *sbi;
1940 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1941 uopt.uid = INVALID_UID;
1942 uopt.gid = INVALID_GID;
1944 uopt.fmode = UDF_INVALID_MODE;
1945 uopt.dmode = UDF_INVALID_MODE;
1947 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1951 sb->s_fs_info = sbi;
1953 mutex_init(&sbi->s_alloc_mutex);
1955 if (!udf_parse_options((char *)options, &uopt, false))
1958 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
1959 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1960 udf_err(sb, "utf8 cannot be combined with iocharset\n");
1963 #ifdef CONFIG_UDF_NLS
1964 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1965 uopt.nls_map = load_nls_default();
1967 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1969 udf_debug("Using default NLS map\n");
1972 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1973 uopt.flags |= (1 << UDF_FLAG_UTF8);
1975 fileset.logicalBlockNum = 0xFFFFFFFF;
1976 fileset.partitionReferenceNum = 0xFFFF;
1978 sbi->s_flags = uopt.flags;
1979 sbi->s_uid = uopt.uid;
1980 sbi->s_gid = uopt.gid;
1981 sbi->s_umask = uopt.umask;
1982 sbi->s_fmode = uopt.fmode;
1983 sbi->s_dmode = uopt.dmode;
1984 sbi->s_nls_map = uopt.nls_map;
1985 rwlock_init(&sbi->s_cred_lock);
1987 if (uopt.session == 0xFFFFFFFF)
1988 sbi->s_session = udf_get_last_session(sb);
1990 sbi->s_session = uopt.session;
1992 udf_debug("Multi-session=%d\n", sbi->s_session);
1994 /* Fill in the rest of the superblock */
1995 sb->s_op = &udf_sb_ops;
1996 sb->s_export_op = &udf_export_ops;
1998 sb->s_magic = UDF_SUPER_MAGIC;
1999 sb->s_time_gran = 1000;
2001 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
2002 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2004 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
2005 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2006 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
2008 pr_notice("Rescanning with blocksize %d\n",
2009 UDF_DEFAULT_BLOCKSIZE);
2010 brelse(sbi->s_lvid_bh);
2011 sbi->s_lvid_bh = NULL;
2012 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
2013 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2017 udf_warn(sb, "No partition found (1)\n");
2021 udf_debug("Lastblock=%d\n", sbi->s_last_block);
2023 if (sbi->s_lvid_bh) {
2024 struct logicalVolIntegrityDescImpUse *lvidiu =
2026 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2027 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
2028 /* uint16_t maxUDFWriteRev =
2029 le16_to_cpu(lvidiu->maxUDFWriteRev); */
2031 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
2032 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
2033 le16_to_cpu(lvidiu->minUDFReadRev),
2034 UDF_MAX_READ_VERSION);
2036 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
2037 sb->s_flags |= MS_RDONLY;
2039 sbi->s_udfrev = minUDFWriteRev;
2041 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2042 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2043 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2044 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2047 if (!sbi->s_partitions) {
2048 udf_warn(sb, "No partition found (2)\n");
2052 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2053 UDF_PART_FLAG_READ_ONLY) {
2054 pr_notice("Partition marked readonly; forcing readonly mount\n");
2055 sb->s_flags |= MS_RDONLY;
2058 if (udf_find_fileset(sb, &fileset, &rootdir)) {
2059 udf_warn(sb, "No fileset found\n");
2064 struct timestamp ts;
2065 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2066 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2067 sbi->s_volume_ident,
2068 le16_to_cpu(ts.year), ts.month, ts.day,
2069 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2071 if (!(sb->s_flags & MS_RDONLY))
2074 /* Assign the root inode */
2075 /* assign inodes by physical block number */
2076 /* perhaps it's not extensible enough, but for now ... */
2077 inode = udf_iget(sb, &rootdir);
2079 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
2080 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2084 /* Allocate a dentry for the root inode */
2085 sb->s_root = d_make_root(inode);
2087 udf_err(sb, "Couldn't allocate root dentry\n");
2090 sb->s_maxbytes = MAX_LFS_FILESIZE;
2091 sb->s_max_links = UDF_MAX_LINKS;
2095 if (sbi->s_vat_inode)
2096 iput(sbi->s_vat_inode);
2097 #ifdef CONFIG_UDF_NLS
2098 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2099 unload_nls(sbi->s_nls_map);
2101 if (!(sb->s_flags & MS_RDONLY))
2103 brelse(sbi->s_lvid_bh);
2104 udf_sb_free_partitions(sb);
2106 sb->s_fs_info = NULL;
2111 void _udf_err(struct super_block *sb, const char *function,
2112 const char *fmt, ...)
2114 struct va_format vaf;
2117 va_start(args, fmt);
2122 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2127 void _udf_warn(struct super_block *sb, const char *function,
2128 const char *fmt, ...)
2130 struct va_format vaf;
2133 va_start(args, fmt);
2138 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2143 static void udf_put_super(struct super_block *sb)
2145 struct udf_sb_info *sbi;
2149 if (sbi->s_vat_inode)
2150 iput(sbi->s_vat_inode);
2151 #ifdef CONFIG_UDF_NLS
2152 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2153 unload_nls(sbi->s_nls_map);
2155 if (!(sb->s_flags & MS_RDONLY))
2157 brelse(sbi->s_lvid_bh);
2158 udf_sb_free_partitions(sb);
2159 kfree(sb->s_fs_info);
2160 sb->s_fs_info = NULL;
2163 static int udf_sync_fs(struct super_block *sb, int wait)
2165 struct udf_sb_info *sbi = UDF_SB(sb);
2167 mutex_lock(&sbi->s_alloc_mutex);
2168 if (sbi->s_lvid_dirty) {
2170 * Blockdevice will be synced later so we don't have to submit
2173 mark_buffer_dirty(sbi->s_lvid_bh);
2174 sbi->s_lvid_dirty = 0;
2176 mutex_unlock(&sbi->s_alloc_mutex);
2181 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2183 struct super_block *sb = dentry->d_sb;
2184 struct udf_sb_info *sbi = UDF_SB(sb);
2185 struct logicalVolIntegrityDescImpUse *lvidiu;
2186 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2188 if (sbi->s_lvid_bh != NULL)
2189 lvidiu = udf_sb_lvidiu(sbi);
2193 buf->f_type = UDF_SUPER_MAGIC;
2194 buf->f_bsize = sb->s_blocksize;
2195 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2196 buf->f_bfree = udf_count_free(sb);
2197 buf->f_bavail = buf->f_bfree;
2198 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2199 le32_to_cpu(lvidiu->numDirs)) : 0)
2201 buf->f_ffree = buf->f_bfree;
2202 buf->f_namelen = UDF_NAME_LEN - 2;
2203 buf->f_fsid.val[0] = (u32)id;
2204 buf->f_fsid.val[1] = (u32)(id >> 32);
2209 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2210 struct udf_bitmap *bitmap)
2212 struct buffer_head *bh = NULL;
2213 unsigned int accum = 0;
2215 int block = 0, newblock;
2216 struct kernel_lb_addr loc;
2220 struct spaceBitmapDesc *bm;
2222 loc.logicalBlockNum = bitmap->s_extPosition;
2223 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2224 bh = udf_read_ptagged(sb, &loc, 0, &ident);
2227 udf_err(sb, "udf_count_free failed\n");
2229 } else if (ident != TAG_IDENT_SBD) {
2231 udf_err(sb, "udf_count_free failed\n");
2235 bm = (struct spaceBitmapDesc *)bh->b_data;
2236 bytes = le32_to_cpu(bm->numOfBytes);
2237 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2238 ptr = (uint8_t *)bh->b_data;
2241 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2242 accum += bitmap_weight((const unsigned long *)(ptr + index),
2247 newblock = udf_get_lb_pblock(sb, &loc, ++block);
2248 bh = udf_tread(sb, newblock);
2250 udf_debug("read failed\n");
2254 ptr = (uint8_t *)bh->b_data;
2262 static unsigned int udf_count_free_table(struct super_block *sb,
2263 struct inode *table)
2265 unsigned int accum = 0;
2267 struct kernel_lb_addr eloc;
2269 struct extent_position epos;
2271 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
2272 epos.block = UDF_I(table)->i_location;
2273 epos.offset = sizeof(struct unallocSpaceEntry);
2276 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2277 accum += (elen >> table->i_sb->s_blocksize_bits);
2280 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
2285 static unsigned int udf_count_free(struct super_block *sb)
2287 unsigned int accum = 0;
2288 struct udf_sb_info *sbi;
2289 struct udf_part_map *map;
2292 if (sbi->s_lvid_bh) {
2293 struct logicalVolIntegrityDesc *lvid =
2294 (struct logicalVolIntegrityDesc *)
2295 sbi->s_lvid_bh->b_data;
2296 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2297 accum = le32_to_cpu(
2298 lvid->freeSpaceTable[sbi->s_partition]);
2299 if (accum == 0xFFFFFFFF)
2307 map = &sbi->s_partmaps[sbi->s_partition];
2308 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2309 accum += udf_count_free_bitmap(sb,
2310 map->s_uspace.s_bitmap);
2312 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2313 accum += udf_count_free_bitmap(sb,
2314 map->s_fspace.s_bitmap);
2319 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2320 accum += udf_count_free_table(sb,
2321 map->s_uspace.s_table);
2323 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2324 accum += udf_count_free_table(sb,
2325 map->s_fspace.s_table);