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>
68 VDS_POS_PRIMARY_VOL_DESC,
69 VDS_POS_UNALLOC_SPACE_DESC,
70 VDS_POS_LOGICAL_VOL_DESC,
71 VDS_POS_IMP_USE_VOL_DESC,
75 #define VSD_FIRST_SECTOR_OFFSET 32768
76 #define VSD_MAX_SECTOR_OFFSET 0x800000
79 * Maximum number of Terminating Descriptor / Logical Volume Integrity
80 * Descriptor redirections. The chosen numbers are arbitrary - just that we
81 * hopefully don't limit any real use of rewritten inode on write-once media
82 * but avoid looping for too long on corrupted media.
84 #define UDF_MAX_TD_NESTING 64
85 #define UDF_MAX_LVID_NESTING 1000
87 enum { UDF_MAX_LINKS = 0xffff };
89 /* These are the "meat" - everything else is stuffing */
90 static int udf_fill_super(struct super_block *, void *, int);
91 static void udf_put_super(struct super_block *);
92 static int udf_sync_fs(struct super_block *, int);
93 static int udf_remount_fs(struct super_block *, int *, char *);
94 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
95 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
96 struct kernel_lb_addr *);
97 static void udf_load_fileset(struct super_block *, struct buffer_head *,
98 struct kernel_lb_addr *);
99 static void udf_open_lvid(struct super_block *);
100 static void udf_close_lvid(struct super_block *);
101 static unsigned int udf_count_free(struct super_block *);
102 static int udf_statfs(struct dentry *, struct kstatfs *);
103 static int udf_show_options(struct seq_file *, struct dentry *);
105 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
107 struct logicalVolIntegrityDesc *lvid;
108 unsigned int partnum;
111 if (!UDF_SB(sb)->s_lvid_bh)
113 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
114 partnum = le32_to_cpu(lvid->numOfPartitions);
115 if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
116 offsetof(struct logicalVolIntegrityDesc, impUse)) /
117 (2 * sizeof(uint32_t)) < partnum) {
118 udf_err(sb, "Logical volume integrity descriptor corrupted "
119 "(numOfPartitions = %u)!\n", partnum);
122 /* The offset is to skip freeSpaceTable and sizeTable arrays */
123 offset = partnum * 2 * sizeof(uint32_t);
124 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
127 /* UDF filesystem type */
128 static struct dentry *udf_mount(struct file_system_type *fs_type,
129 int flags, const char *dev_name, void *data)
131 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
134 static struct file_system_type udf_fstype = {
135 .owner = THIS_MODULE,
138 .kill_sb = kill_block_super,
139 .fs_flags = FS_REQUIRES_DEV,
141 MODULE_ALIAS_FS("udf");
143 static struct kmem_cache *udf_inode_cachep;
145 static struct inode *udf_alloc_inode(struct super_block *sb)
147 struct udf_inode_info *ei;
148 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
153 ei->i_lenExtents = 0;
154 ei->i_next_alloc_block = 0;
155 ei->i_next_alloc_goal = 0;
157 init_rwsem(&ei->i_data_sem);
158 ei->cached_extent.lstart = -1;
159 spin_lock_init(&ei->i_extent_cache_lock);
161 return &ei->vfs_inode;
164 static void udf_i_callback(struct rcu_head *head)
166 struct inode *inode = container_of(head, struct inode, i_rcu);
167 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
170 static void udf_destroy_inode(struct inode *inode)
172 call_rcu(&inode->i_rcu, udf_i_callback);
175 static void init_once(void *foo)
177 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
179 ei->i_ext.i_data = NULL;
180 inode_init_once(&ei->vfs_inode);
183 static int __init init_inodecache(void)
185 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
186 sizeof(struct udf_inode_info),
187 0, (SLAB_RECLAIM_ACCOUNT |
191 if (!udf_inode_cachep)
196 static void destroy_inodecache(void)
199 * Make sure all delayed rcu free inodes are flushed before we
203 kmem_cache_destroy(udf_inode_cachep);
206 /* Superblock operations */
207 static const struct super_operations udf_sb_ops = {
208 .alloc_inode = udf_alloc_inode,
209 .destroy_inode = udf_destroy_inode,
210 .write_inode = udf_write_inode,
211 .evict_inode = udf_evict_inode,
212 .put_super = udf_put_super,
213 .sync_fs = udf_sync_fs,
214 .statfs = udf_statfs,
215 .remount_fs = udf_remount_fs,
216 .show_options = udf_show_options,
221 unsigned int blocksize;
222 unsigned int session;
223 unsigned int lastblock;
231 struct nls_table *nls_map;
234 static int __init init_udf_fs(void)
238 err = init_inodecache();
241 err = register_filesystem(&udf_fstype);
248 destroy_inodecache();
254 static void __exit exit_udf_fs(void)
256 unregister_filesystem(&udf_fstype);
257 destroy_inodecache();
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(*sbi->s_partmaps), GFP_KERNEL);
265 if (!sbi->s_partmaps) {
266 sbi->s_partitions = 0;
270 sbi->s_partitions = count;
274 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
277 int nr_groups = bitmap->s_nr_groups;
279 for (i = 0; i < nr_groups; i++)
280 if (bitmap->s_block_bitmap[i])
281 brelse(bitmap->s_block_bitmap[i]);
286 static void udf_free_partition(struct udf_part_map *map)
289 struct udf_meta_data *mdata;
291 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
292 iput(map->s_uspace.s_table);
293 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
294 iput(map->s_fspace.s_table);
295 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
296 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
297 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
298 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
299 if (map->s_partition_type == UDF_SPARABLE_MAP15)
300 for (i = 0; i < 4; i++)
301 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
302 else if (map->s_partition_type == UDF_METADATA_MAP25) {
303 mdata = &map->s_type_specific.s_metadata;
304 iput(mdata->s_metadata_fe);
305 mdata->s_metadata_fe = NULL;
307 iput(mdata->s_mirror_fe);
308 mdata->s_mirror_fe = NULL;
310 iput(mdata->s_bitmap_fe);
311 mdata->s_bitmap_fe = NULL;
315 static void udf_sb_free_partitions(struct super_block *sb)
317 struct udf_sb_info *sbi = UDF_SB(sb);
320 if (!sbi->s_partmaps)
322 for (i = 0; i < sbi->s_partitions; i++)
323 udf_free_partition(&sbi->s_partmaps[i]);
324 kfree(sbi->s_partmaps);
325 sbi->s_partmaps = NULL;
328 static int udf_show_options(struct seq_file *seq, struct dentry *root)
330 struct super_block *sb = root->d_sb;
331 struct udf_sb_info *sbi = UDF_SB(sb);
333 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
334 seq_puts(seq, ",nostrict");
335 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
336 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
337 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
338 seq_puts(seq, ",unhide");
339 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
340 seq_puts(seq, ",undelete");
341 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
342 seq_puts(seq, ",noadinicb");
343 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
344 seq_puts(seq, ",shortad");
345 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
346 seq_puts(seq, ",uid=forget");
347 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
348 seq_puts(seq, ",gid=forget");
349 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
350 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
351 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
352 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
353 if (sbi->s_umask != 0)
354 seq_printf(seq, ",umask=%ho", sbi->s_umask);
355 if (sbi->s_fmode != UDF_INVALID_MODE)
356 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
357 if (sbi->s_dmode != UDF_INVALID_MODE)
358 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
359 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
360 seq_printf(seq, ",session=%d", sbi->s_session);
361 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
362 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
363 if (sbi->s_anchor != 0)
364 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
365 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
366 seq_puts(seq, ",utf8");
367 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
368 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
377 * Parse mount options.
380 * The following mount options are supported:
382 * gid= Set the default group.
383 * umask= Set the default umask.
384 * mode= Set the default file permissions.
385 * dmode= Set the default directory permissions.
386 * uid= Set the default user.
387 * bs= Set the block size.
388 * unhide Show otherwise hidden files.
389 * undelete Show deleted files in lists.
390 * adinicb Embed data in the inode (default)
391 * noadinicb Don't embed data in the inode
392 * shortad Use short ad's
393 * longad Use long ad's (default)
394 * nostrict Unset strict conformance
395 * iocharset= Set the NLS character set
397 * The remaining are for debugging and disaster recovery:
399 * novrs Skip volume sequence recognition
401 * The following expect a offset from 0.
403 * session= Set the CDROM session (default= last session)
404 * anchor= Override standard anchor location. (default= 256)
405 * volume= Override the VolumeDesc location. (unused)
406 * partition= Override the PartitionDesc location. (unused)
407 * lastblock= Set the last block of the filesystem/
409 * The following expect a offset from the partition root.
411 * fileset= Override the fileset block location. (unused)
412 * rootdir= Override the root directory location. (unused)
413 * WARNING: overriding the rootdir to a non-directory may
414 * yield highly unpredictable results.
417 * options Pointer to mount options string.
418 * uopts Pointer to mount options variable.
421 * <return> 1 Mount options parsed okay.
422 * <return> 0 Error parsing mount options.
425 * July 1, 1997 - Andrew E. Mileski
426 * Written, tested, and released.
430 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
431 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
432 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
433 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
434 Opt_rootdir, Opt_utf8, Opt_iocharset,
435 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
439 static const match_table_t tokens = {
440 {Opt_novrs, "novrs"},
441 {Opt_nostrict, "nostrict"},
443 {Opt_unhide, "unhide"},
444 {Opt_undelete, "undelete"},
445 {Opt_noadinicb, "noadinicb"},
446 {Opt_adinicb, "adinicb"},
447 {Opt_shortad, "shortad"},
448 {Opt_longad, "longad"},
449 {Opt_uforget, "uid=forget"},
450 {Opt_uignore, "uid=ignore"},
451 {Opt_gforget, "gid=forget"},
452 {Opt_gignore, "gid=ignore"},
455 {Opt_umask, "umask=%o"},
456 {Opt_session, "session=%u"},
457 {Opt_lastblock, "lastblock=%u"},
458 {Opt_anchor, "anchor=%u"},
459 {Opt_volume, "volume=%u"},
460 {Opt_partition, "partition=%u"},
461 {Opt_fileset, "fileset=%u"},
462 {Opt_rootdir, "rootdir=%u"},
464 {Opt_iocharset, "iocharset=%s"},
465 {Opt_fmode, "mode=%o"},
466 {Opt_dmode, "dmode=%o"},
470 static int udf_parse_options(char *options, struct udf_options *uopt,
477 uopt->session = 0xFFFFFFFF;
484 while ((p = strsep(&options, ",")) != NULL) {
485 substring_t args[MAX_OPT_ARGS];
491 token = match_token(p, tokens, args);
497 if (match_int(&args[0], &option))
500 if (n != 512 && n != 1024 && n != 2048 && n != 4096)
503 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
506 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
509 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
512 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
515 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
518 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
521 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
524 if (match_int(args, &option))
526 uopt->gid = make_kgid(current_user_ns(), option);
527 if (!gid_valid(uopt->gid))
529 uopt->flags |= (1 << UDF_FLAG_GID_SET);
532 if (match_int(args, &option))
534 uopt->uid = make_kuid(current_user_ns(), option);
535 if (!uid_valid(uopt->uid))
537 uopt->flags |= (1 << UDF_FLAG_UID_SET);
540 if (match_octal(args, &option))
542 uopt->umask = option;
545 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
548 if (match_int(args, &option))
550 uopt->session = option;
552 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
555 if (match_int(args, &option))
557 uopt->lastblock = option;
559 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
562 if (match_int(args, &option))
564 uopt->anchor = option;
570 /* Ignored (never implemented properly) */
573 uopt->flags |= (1 << UDF_FLAG_UTF8);
578 unload_nls(uopt->nls_map);
579 uopt->nls_map = load_nls(args[0].from);
580 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
584 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
588 /* These options are superseeded by uid=<number> */
591 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
594 if (match_octal(args, &option))
596 uopt->fmode = option & 0777;
599 if (match_octal(args, &option))
601 uopt->dmode = option & 0777;
604 pr_err("bad mount option \"%s\" or missing value\n", p);
611 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
613 struct udf_options uopt;
614 struct udf_sb_info *sbi = UDF_SB(sb);
616 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
620 int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
621 if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & SB_RDONLY))
625 uopt.flags = sbi->s_flags;
626 uopt.uid = sbi->s_uid;
627 uopt.gid = sbi->s_gid;
628 uopt.umask = sbi->s_umask;
629 uopt.fmode = sbi->s_fmode;
630 uopt.dmode = sbi->s_dmode;
633 if (!udf_parse_options(options, &uopt, true))
636 write_lock(&sbi->s_cred_lock);
637 sbi->s_flags = uopt.flags;
638 sbi->s_uid = uopt.uid;
639 sbi->s_gid = uopt.gid;
640 sbi->s_umask = uopt.umask;
641 sbi->s_fmode = uopt.fmode;
642 sbi->s_dmode = uopt.dmode;
643 write_unlock(&sbi->s_cred_lock);
645 if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb))
648 if (*flags & SB_RDONLY)
657 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
658 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
659 static loff_t udf_check_vsd(struct super_block *sb)
661 struct volStructDesc *vsd = NULL;
662 loff_t sector = VSD_FIRST_SECTOR_OFFSET;
664 struct buffer_head *bh = NULL;
667 struct udf_sb_info *sbi;
670 if (sb->s_blocksize < sizeof(struct volStructDesc))
671 sectorsize = sizeof(struct volStructDesc);
673 sectorsize = sb->s_blocksize;
675 sector += (((loff_t)sbi->s_session) << sb->s_blocksize_bits);
677 udf_debug("Starting at sector %u (%lu byte sectors)\n",
678 (unsigned int)(sector >> sb->s_blocksize_bits),
680 /* Process the sequence (if applicable). The hard limit on the sector
681 * offset is arbitrary, hopefully large enough so that all valid UDF
682 * filesystems will be recognised. There is no mention of an upper
683 * bound to the size of the volume recognition area in the standard.
684 * The limit will prevent the code to read all the sectors of a
685 * specially crafted image (like a bluray disc full of CD001 sectors),
686 * potentially causing minutes or even hours of uninterruptible I/O
687 * activity. This actually happened with uninitialised SSD partitions
688 * (all 0xFF) before the check for the limit and all valid IDs were
690 for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET;
691 sector += sectorsize) {
693 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
697 /* Look for ISO descriptors */
698 vsd = (struct volStructDesc *)(bh->b_data +
699 (sector & (sb->s_blocksize - 1)));
701 if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
703 switch (vsd->structType) {
705 udf_debug("ISO9660 Boot Record found\n");
708 udf_debug("ISO9660 Primary Volume Descriptor found\n");
711 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
714 udf_debug("ISO9660 Volume Partition Descriptor found\n");
717 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
720 udf_debug("ISO9660 VRS (%u) found\n",
724 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
727 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
731 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
734 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
737 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2,
740 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02,
744 /* invalid id : end of volume recognition area */
755 else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) ==
756 VSD_FIRST_SECTOR_OFFSET)
762 static int udf_find_fileset(struct super_block *sb,
763 struct kernel_lb_addr *fileset,
764 struct kernel_lb_addr *root)
766 struct buffer_head *bh = NULL;
769 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
770 fileset->partitionReferenceNum != 0xFFFF) {
771 bh = udf_read_ptagged(sb, fileset, 0, &ident);
775 } else if (ident != TAG_IDENT_FSD) {
780 udf_debug("Fileset at block=%u, partition=%u\n",
781 fileset->logicalBlockNum,
782 fileset->partitionReferenceNum);
784 UDF_SB(sb)->s_partition = fileset->partitionReferenceNum;
785 udf_load_fileset(sb, bh, root);
793 * Load primary Volume Descriptor Sequence
795 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
798 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
800 struct primaryVolDesc *pvoldesc;
802 struct buffer_head *bh;
806 struct timestamp *ts;
809 outstr = kmalloc(128, GFP_NOFS);
813 bh = udf_read_tagged(sb, block, block, &ident);
819 if (ident != TAG_IDENT_PVD) {
824 pvoldesc = (struct primaryVolDesc *)bh->b_data;
826 udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
827 pvoldesc->recordingDateAndTime);
829 ts = &pvoldesc->recordingDateAndTime;
830 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
831 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
832 ts->minute, le16_to_cpu(ts->typeAndTimezone));
836 ret = udf_dstrCS0toChar(sb, outstr, 31, pvoldesc->volIdent, 32);
840 strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret);
841 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
843 ret = udf_dstrCS0toChar(sb, outstr, 127, pvoldesc->volSetIdent, 128);
848 udf_debug("volSetIdent[] = '%s'\n", outstr);
858 struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
859 u32 meta_file_loc, u32 partition_ref)
861 struct kernel_lb_addr addr;
862 struct inode *metadata_fe;
864 addr.logicalBlockNum = meta_file_loc;
865 addr.partitionReferenceNum = partition_ref;
867 metadata_fe = udf_iget_special(sb, &addr);
869 if (IS_ERR(metadata_fe)) {
870 udf_warn(sb, "metadata inode efe not found\n");
873 if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
874 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
876 return ERR_PTR(-EIO);
882 static int udf_load_metadata_files(struct super_block *sb, int partition,
885 struct udf_sb_info *sbi = UDF_SB(sb);
886 struct udf_part_map *map;
887 struct udf_meta_data *mdata;
888 struct kernel_lb_addr addr;
891 map = &sbi->s_partmaps[partition];
892 mdata = &map->s_type_specific.s_metadata;
893 mdata->s_phys_partition_ref = type1_index;
895 /* metadata address */
896 udf_debug("Metadata file location: block = %u part = %u\n",
897 mdata->s_meta_file_loc, mdata->s_phys_partition_ref);
899 fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc,
900 mdata->s_phys_partition_ref);
902 /* mirror file entry */
903 udf_debug("Mirror metadata file location: block = %u part = %u\n",
904 mdata->s_mirror_file_loc, mdata->s_phys_partition_ref);
906 fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc,
907 mdata->s_phys_partition_ref);
910 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
913 mdata->s_mirror_fe = fe;
915 mdata->s_metadata_fe = fe;
921 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
923 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
924 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
925 addr.partitionReferenceNum = mdata->s_phys_partition_ref;
927 udf_debug("Bitmap file location: block = %u part = %u\n",
928 addr.logicalBlockNum, addr.partitionReferenceNum);
930 fe = udf_iget_special(sb, &addr);
933 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
935 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
939 mdata->s_bitmap_fe = fe;
942 udf_debug("udf_load_metadata_files Ok\n");
946 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
947 struct kernel_lb_addr *root)
949 struct fileSetDesc *fset;
951 fset = (struct fileSetDesc *)bh->b_data;
953 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
955 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
957 udf_debug("Rootdir at block=%u, partition=%u\n",
958 root->logicalBlockNum, root->partitionReferenceNum);
961 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
963 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
964 return DIV_ROUND_UP(map->s_partition_len +
965 (sizeof(struct spaceBitmapDesc) << 3),
966 sb->s_blocksize * 8);
969 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
971 struct udf_bitmap *bitmap;
975 nr_groups = udf_compute_nr_groups(sb, index);
976 size = sizeof(struct udf_bitmap) +
977 (sizeof(struct buffer_head *) * nr_groups);
979 if (size <= PAGE_SIZE)
980 bitmap = kzalloc(size, GFP_KERNEL);
982 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
987 bitmap->s_nr_groups = nr_groups;
991 static int udf_fill_partdesc_info(struct super_block *sb,
992 struct partitionDesc *p, int p_index)
994 struct udf_part_map *map;
995 struct udf_sb_info *sbi = UDF_SB(sb);
996 struct partitionHeaderDesc *phd;
998 map = &sbi->s_partmaps[p_index];
1000 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1001 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1003 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1004 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1005 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1006 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1007 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1008 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1009 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1010 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1012 udf_debug("Partition (%d type %x) starts at physical %u, block length %u\n",
1013 p_index, map->s_partition_type,
1014 map->s_partition_root, map->s_partition_len);
1016 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1017 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1020 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1021 if (phd->unallocSpaceTable.extLength) {
1022 struct kernel_lb_addr loc = {
1023 .logicalBlockNum = le32_to_cpu(
1024 phd->unallocSpaceTable.extPosition),
1025 .partitionReferenceNum = p_index,
1027 struct inode *inode;
1029 inode = udf_iget_special(sb, &loc);
1030 if (IS_ERR(inode)) {
1031 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1033 return PTR_ERR(inode);
1035 map->s_uspace.s_table = inode;
1036 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1037 udf_debug("unallocSpaceTable (part %d) @ %lu\n",
1038 p_index, map->s_uspace.s_table->i_ino);
1041 if (phd->unallocSpaceBitmap.extLength) {
1042 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1045 map->s_uspace.s_bitmap = bitmap;
1046 bitmap->s_extPosition = le32_to_cpu(
1047 phd->unallocSpaceBitmap.extPosition);
1048 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1049 udf_debug("unallocSpaceBitmap (part %d) @ %u\n",
1050 p_index, bitmap->s_extPosition);
1053 if (phd->partitionIntegrityTable.extLength)
1054 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1056 if (phd->freedSpaceTable.extLength) {
1057 struct kernel_lb_addr loc = {
1058 .logicalBlockNum = le32_to_cpu(
1059 phd->freedSpaceTable.extPosition),
1060 .partitionReferenceNum = p_index,
1062 struct inode *inode;
1064 inode = udf_iget_special(sb, &loc);
1065 if (IS_ERR(inode)) {
1066 udf_debug("cannot load freedSpaceTable (part %d)\n",
1068 return PTR_ERR(inode);
1070 map->s_fspace.s_table = inode;
1071 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1072 udf_debug("freedSpaceTable (part %d) @ %lu\n",
1073 p_index, map->s_fspace.s_table->i_ino);
1076 if (phd->freedSpaceBitmap.extLength) {
1077 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1080 map->s_fspace.s_bitmap = bitmap;
1081 bitmap->s_extPosition = le32_to_cpu(
1082 phd->freedSpaceBitmap.extPosition);
1083 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1084 udf_debug("freedSpaceBitmap (part %d) @ %u\n",
1085 p_index, bitmap->s_extPosition);
1090 static void udf_find_vat_block(struct super_block *sb, int p_index,
1091 int type1_index, sector_t start_block)
1093 struct udf_sb_info *sbi = UDF_SB(sb);
1094 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1096 struct kernel_lb_addr ino;
1097 struct inode *inode;
1100 * VAT file entry is in the last recorded block. Some broken disks have
1101 * it a few blocks before so try a bit harder...
1103 ino.partitionReferenceNum = type1_index;
1104 for (vat_block = start_block;
1105 vat_block >= map->s_partition_root &&
1106 vat_block >= start_block - 3; vat_block--) {
1107 ino.logicalBlockNum = vat_block - map->s_partition_root;
1108 inode = udf_iget_special(sb, &ino);
1109 if (!IS_ERR(inode)) {
1110 sbi->s_vat_inode = inode;
1116 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1118 struct udf_sb_info *sbi = UDF_SB(sb);
1119 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1120 struct buffer_head *bh = NULL;
1121 struct udf_inode_info *vati;
1123 struct virtualAllocationTable20 *vat20;
1124 sector_t blocks = i_size_read(sb->s_bdev->bd_inode) >>
1125 sb->s_blocksize_bits;
1127 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
1128 if (!sbi->s_vat_inode &&
1129 sbi->s_last_block != blocks - 1) {
1130 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1131 (unsigned long)sbi->s_last_block,
1132 (unsigned long)blocks - 1);
1133 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
1135 if (!sbi->s_vat_inode)
1138 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1139 map->s_type_specific.s_virtual.s_start_offset = 0;
1140 map->s_type_specific.s_virtual.s_num_entries =
1141 (sbi->s_vat_inode->i_size - 36) >> 2;
1142 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1143 vati = UDF_I(sbi->s_vat_inode);
1144 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1145 pos = udf_block_map(sbi->s_vat_inode, 0);
1146 bh = sb_bread(sb, pos);
1149 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1151 vat20 = (struct virtualAllocationTable20 *)
1155 map->s_type_specific.s_virtual.s_start_offset =
1156 le16_to_cpu(vat20->lengthHeader);
1157 map->s_type_specific.s_virtual.s_num_entries =
1158 (sbi->s_vat_inode->i_size -
1159 map->s_type_specific.s_virtual.
1160 s_start_offset) >> 2;
1167 * Load partition descriptor block
1169 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1172 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1174 struct buffer_head *bh;
1175 struct partitionDesc *p;
1176 struct udf_part_map *map;
1177 struct udf_sb_info *sbi = UDF_SB(sb);
1179 uint16_t partitionNumber;
1183 bh = udf_read_tagged(sb, block, block, &ident);
1186 if (ident != TAG_IDENT_PD) {
1191 p = (struct partitionDesc *)bh->b_data;
1192 partitionNumber = le16_to_cpu(p->partitionNumber);
1194 /* First scan for TYPE1 and SPARABLE partitions */
1195 for (i = 0; i < sbi->s_partitions; i++) {
1196 map = &sbi->s_partmaps[i];
1197 udf_debug("Searching map: (%u == %u)\n",
1198 map->s_partition_num, partitionNumber);
1199 if (map->s_partition_num == partitionNumber &&
1200 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1201 map->s_partition_type == UDF_SPARABLE_MAP15))
1205 if (i >= sbi->s_partitions) {
1206 udf_debug("Partition (%u) not found in partition map\n",
1212 ret = udf_fill_partdesc_info(sb, p, i);
1217 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1218 * PHYSICAL partitions are already set up
1222 map = NULL; /* supress 'maybe used uninitialized' warning */
1224 for (i = 0; i < sbi->s_partitions; i++) {
1225 map = &sbi->s_partmaps[i];
1227 if (map->s_partition_num == partitionNumber &&
1228 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1229 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1230 map->s_partition_type == UDF_METADATA_MAP25))
1234 if (i >= sbi->s_partitions) {
1239 ret = udf_fill_partdesc_info(sb, p, i);
1243 if (map->s_partition_type == UDF_METADATA_MAP25) {
1244 ret = udf_load_metadata_files(sb, i, type1_idx);
1246 udf_err(sb, "error loading MetaData partition map %d\n",
1252 * If we have a partition with virtual map, we don't handle
1253 * writing to it (we overwrite blocks instead of relocating
1256 if (!sb_rdonly(sb)) {
1260 ret = udf_load_vat(sb, i, type1_idx);
1266 /* In case loading failed, we handle cleanup in udf_fill_super */
1271 static int udf_load_sparable_map(struct super_block *sb,
1272 struct udf_part_map *map,
1273 struct sparablePartitionMap *spm)
1277 struct sparingTable *st;
1278 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1280 struct buffer_head *bh;
1282 map->s_partition_type = UDF_SPARABLE_MAP15;
1283 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1284 if (!is_power_of_2(sdata->s_packet_len)) {
1285 udf_err(sb, "error loading logical volume descriptor: "
1286 "Invalid packet length %u\n",
1287 (unsigned)sdata->s_packet_len);
1290 if (spm->numSparingTables > 4) {
1291 udf_err(sb, "error loading logical volume descriptor: "
1292 "Too many sparing tables (%d)\n",
1293 (int)spm->numSparingTables);
1297 for (i = 0; i < spm->numSparingTables; i++) {
1298 loc = le32_to_cpu(spm->locSparingTable[i]);
1299 bh = udf_read_tagged(sb, loc, loc, &ident);
1303 st = (struct sparingTable *)bh->b_data;
1305 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1306 strlen(UDF_ID_SPARING)) ||
1307 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1313 sdata->s_spar_map[i] = bh;
1315 map->s_partition_func = udf_get_pblock_spar15;
1319 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1320 struct kernel_lb_addr *fileset)
1322 struct logicalVolDesc *lvd;
1325 struct udf_sb_info *sbi = UDF_SB(sb);
1326 struct genericPartitionMap *gpm;
1328 struct buffer_head *bh;
1329 unsigned int table_len;
1332 bh = udf_read_tagged(sb, block, block, &ident);
1335 BUG_ON(ident != TAG_IDENT_LVD);
1336 lvd = (struct logicalVolDesc *)bh->b_data;
1337 table_len = le32_to_cpu(lvd->mapTableLength);
1338 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
1339 udf_err(sb, "error loading logical volume descriptor: "
1340 "Partition table too long (%u > %lu)\n", table_len,
1341 sb->s_blocksize - sizeof(*lvd));
1346 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1350 for (i = 0, offset = 0;
1351 i < sbi->s_partitions && offset < table_len;
1352 i++, offset += gpm->partitionMapLength) {
1353 struct udf_part_map *map = &sbi->s_partmaps[i];
1354 gpm = (struct genericPartitionMap *)
1355 &(lvd->partitionMaps[offset]);
1356 type = gpm->partitionMapType;
1358 struct genericPartitionMap1 *gpm1 =
1359 (struct genericPartitionMap1 *)gpm;
1360 map->s_partition_type = UDF_TYPE1_MAP15;
1361 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1362 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1363 map->s_partition_func = NULL;
1364 } else if (type == 2) {
1365 struct udfPartitionMap2 *upm2 =
1366 (struct udfPartitionMap2 *)gpm;
1367 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1368 strlen(UDF_ID_VIRTUAL))) {
1370 le16_to_cpu(((__le16 *)upm2->partIdent.
1373 map->s_partition_type =
1375 map->s_partition_func =
1376 udf_get_pblock_virt15;
1378 map->s_partition_type =
1380 map->s_partition_func =
1381 udf_get_pblock_virt20;
1383 } else if (!strncmp(upm2->partIdent.ident,
1385 strlen(UDF_ID_SPARABLE))) {
1386 ret = udf_load_sparable_map(sb, map,
1387 (struct sparablePartitionMap *)gpm);
1390 } else if (!strncmp(upm2->partIdent.ident,
1392 strlen(UDF_ID_METADATA))) {
1393 struct udf_meta_data *mdata =
1394 &map->s_type_specific.s_metadata;
1395 struct metadataPartitionMap *mdm =
1396 (struct metadataPartitionMap *)
1397 &(lvd->partitionMaps[offset]);
1398 udf_debug("Parsing Logical vol part %d type %u id=%s\n",
1399 i, type, UDF_ID_METADATA);
1401 map->s_partition_type = UDF_METADATA_MAP25;
1402 map->s_partition_func = udf_get_pblock_meta25;
1404 mdata->s_meta_file_loc =
1405 le32_to_cpu(mdm->metadataFileLoc);
1406 mdata->s_mirror_file_loc =
1407 le32_to_cpu(mdm->metadataMirrorFileLoc);
1408 mdata->s_bitmap_file_loc =
1409 le32_to_cpu(mdm->metadataBitmapFileLoc);
1410 mdata->s_alloc_unit_size =
1411 le32_to_cpu(mdm->allocUnitSize);
1412 mdata->s_align_unit_size =
1413 le16_to_cpu(mdm->alignUnitSize);
1414 if (mdm->flags & 0x01)
1415 mdata->s_flags |= MF_DUPLICATE_MD;
1417 udf_debug("Metadata Ident suffix=0x%x\n",
1418 le16_to_cpu(*(__le16 *)
1419 mdm->partIdent.identSuffix));
1420 udf_debug("Metadata part num=%u\n",
1421 le16_to_cpu(mdm->partitionNum));
1422 udf_debug("Metadata part alloc unit size=%u\n",
1423 le32_to_cpu(mdm->allocUnitSize));
1424 udf_debug("Metadata file loc=%u\n",
1425 le32_to_cpu(mdm->metadataFileLoc));
1426 udf_debug("Mirror file loc=%u\n",
1427 le32_to_cpu(mdm->metadataMirrorFileLoc));
1428 udf_debug("Bitmap file loc=%u\n",
1429 le32_to_cpu(mdm->metadataBitmapFileLoc));
1430 udf_debug("Flags: %d %u\n",
1431 mdata->s_flags, mdm->flags);
1433 udf_debug("Unknown ident: %s\n",
1434 upm2->partIdent.ident);
1437 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1438 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1440 udf_debug("Partition (%d:%u) type %u on volume %u\n",
1441 i, map->s_partition_num, type, map->s_volumeseqnum);
1445 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1447 *fileset = lelb_to_cpu(la->extLocation);
1448 udf_debug("FileSet found in LogicalVolDesc at block=%u, partition=%u\n",
1449 fileset->logicalBlockNum,
1450 fileset->partitionReferenceNum);
1452 if (lvd->integritySeqExt.extLength)
1453 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1461 * Find the prevailing Logical Volume Integrity Descriptor.
1463 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1465 struct buffer_head *bh, *final_bh;
1467 struct udf_sb_info *sbi = UDF_SB(sb);
1468 struct logicalVolIntegrityDesc *lvid;
1469 int indirections = 0;
1471 while (++indirections <= UDF_MAX_LVID_NESTING) {
1473 while (loc.extLength > 0 &&
1474 (bh = udf_read_tagged(sb, loc.extLocation,
1475 loc.extLocation, &ident))) {
1476 if (ident != TAG_IDENT_LVID) {
1484 loc.extLength -= sb->s_blocksize;
1491 brelse(sbi->s_lvid_bh);
1492 sbi->s_lvid_bh = final_bh;
1494 lvid = (struct logicalVolIntegrityDesc *)final_bh->b_data;
1495 if (lvid->nextIntegrityExt.extLength == 0)
1498 loc = leea_to_cpu(lvid->nextIntegrityExt);
1501 udf_warn(sb, "Too many LVID indirections (max %u), ignoring.\n",
1502 UDF_MAX_LVID_NESTING);
1503 brelse(sbi->s_lvid_bh);
1504 sbi->s_lvid_bh = NULL;
1508 * Step for reallocation of table of partition descriptor sequence numbers.
1509 * Must be power of 2.
1511 #define PART_DESC_ALLOC_STEP 32
1513 struct part_desc_seq_scan_data {
1514 struct udf_vds_record rec;
1518 struct desc_seq_scan_data {
1519 struct udf_vds_record vds[VDS_POS_LENGTH];
1520 unsigned int size_part_descs;
1521 unsigned int num_part_descs;
1522 struct part_desc_seq_scan_data *part_descs_loc;
1525 static struct udf_vds_record *handle_partition_descriptor(
1526 struct buffer_head *bh,
1527 struct desc_seq_scan_data *data)
1529 struct partitionDesc *desc = (struct partitionDesc *)bh->b_data;
1533 partnum = le16_to_cpu(desc->partitionNumber);
1534 for (i = 0; i < data->num_part_descs; i++)
1535 if (partnum == data->part_descs_loc[i].partnum)
1536 return &(data->part_descs_loc[i].rec);
1537 if (data->num_part_descs >= data->size_part_descs) {
1538 struct part_desc_seq_scan_data *new_loc;
1539 unsigned int new_size = ALIGN(partnum, PART_DESC_ALLOC_STEP);
1541 new_loc = kcalloc(new_size, sizeof(*new_loc), GFP_KERNEL);
1543 return ERR_PTR(-ENOMEM);
1544 memcpy(new_loc, data->part_descs_loc,
1545 data->size_part_descs * sizeof(*new_loc));
1546 kfree(data->part_descs_loc);
1547 data->part_descs_loc = new_loc;
1548 data->size_part_descs = new_size;
1550 return &(data->part_descs_loc[data->num_part_descs++].rec);
1554 static struct udf_vds_record *get_volume_descriptor_record(uint16_t ident,
1555 struct buffer_head *bh, struct desc_seq_scan_data *data)
1558 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1559 return &(data->vds[VDS_POS_PRIMARY_VOL_DESC]);
1560 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1561 return &(data->vds[VDS_POS_IMP_USE_VOL_DESC]);
1562 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1563 return &(data->vds[VDS_POS_LOGICAL_VOL_DESC]);
1564 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1565 return &(data->vds[VDS_POS_UNALLOC_SPACE_DESC]);
1566 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1567 return handle_partition_descriptor(bh, data);
1573 * Process a main/reserve volume descriptor sequence.
1574 * @block First block of first extent of the sequence.
1575 * @lastblock Lastblock of first extent of the sequence.
1576 * @fileset There we store extent containing root fileset
1578 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1581 static noinline int udf_process_sequence(
1582 struct super_block *sb,
1583 sector_t block, sector_t lastblock,
1584 struct kernel_lb_addr *fileset)
1586 struct buffer_head *bh = NULL;
1587 struct udf_vds_record *curr;
1588 struct generic_desc *gd;
1589 struct volDescPtr *vdp;
1594 unsigned int indirections = 0;
1595 struct desc_seq_scan_data data;
1598 memset(data.vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1599 data.size_part_descs = PART_DESC_ALLOC_STEP;
1600 data.num_part_descs = 0;
1601 data.part_descs_loc = kcalloc(data.size_part_descs,
1602 sizeof(*data.part_descs_loc),
1604 if (!data.part_descs_loc)
1608 * Read the main descriptor sequence and find which descriptors
1611 for (; (!done && block <= lastblock); block++) {
1612 bh = udf_read_tagged(sb, block, block, &ident);
1616 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1617 gd = (struct generic_desc *)bh->b_data;
1618 vdsn = le32_to_cpu(gd->volDescSeqNum);
1620 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1621 if (++indirections > UDF_MAX_TD_NESTING) {
1622 udf_err(sb, "too many Volume Descriptor "
1623 "Pointers (max %u supported)\n",
1624 UDF_MAX_TD_NESTING);
1629 vdp = (struct volDescPtr *)bh->b_data;
1630 block = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation);
1631 lastblock = le32_to_cpu(
1632 vdp->nextVolDescSeqExt.extLength) >>
1633 sb->s_blocksize_bits;
1634 lastblock += block - 1;
1635 /* For loop is going to increment 'block' again */
1638 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1639 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1640 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1641 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1642 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1643 curr = get_volume_descriptor_record(ident, bh, &data);
1646 return PTR_ERR(curr);
1648 /* Descriptor we don't care about? */
1651 if (vdsn >= curr->volDescSeqNum) {
1652 curr->volDescSeqNum = vdsn;
1653 curr->block = block;
1656 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1663 * Now read interesting descriptors again and process them
1664 * in a suitable order
1666 if (!data.vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1667 udf_err(sb, "Primary Volume Descriptor not found!\n");
1670 ret = udf_load_pvoldesc(sb, data.vds[VDS_POS_PRIMARY_VOL_DESC].block);
1674 if (data.vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1675 ret = udf_load_logicalvol(sb,
1676 data.vds[VDS_POS_LOGICAL_VOL_DESC].block,
1682 /* Now handle prevailing Partition Descriptors */
1683 for (i = 0; i < data.num_part_descs; i++) {
1684 ret = udf_load_partdesc(sb, data.part_descs_loc[i].rec.block);
1693 * Load Volume Descriptor Sequence described by anchor in bh
1695 * Returns <0 on error, 0 on success
1697 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1698 struct kernel_lb_addr *fileset)
1700 struct anchorVolDescPtr *anchor;
1701 sector_t main_s, main_e, reserve_s, reserve_e;
1704 anchor = (struct anchorVolDescPtr *)bh->b_data;
1706 /* Locate the main sequence */
1707 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1708 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1709 main_e = main_e >> sb->s_blocksize_bits;
1710 main_e += main_s - 1;
1712 /* Locate the reserve sequence */
1713 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1714 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1715 reserve_e = reserve_e >> sb->s_blocksize_bits;
1716 reserve_e += reserve_s - 1;
1718 /* Process the main & reserve sequences */
1719 /* responsible for finding the PartitionDesc(s) */
1720 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1723 udf_sb_free_partitions(sb);
1724 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1726 udf_sb_free_partitions(sb);
1727 /* No sequence was OK, return -EIO */
1735 * Check whether there is an anchor block in the given block and
1736 * load Volume Descriptor Sequence if so.
1738 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1741 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1742 struct kernel_lb_addr *fileset)
1744 struct buffer_head *bh;
1748 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1749 udf_fixed_to_variable(block) >=
1750 i_size_read(sb->s_bdev->bd_inode) >> sb->s_blocksize_bits)
1753 bh = udf_read_tagged(sb, block, block, &ident);
1756 if (ident != TAG_IDENT_AVDP) {
1760 ret = udf_load_sequence(sb, bh, fileset);
1766 * Search for an anchor volume descriptor pointer.
1768 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1771 static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1772 struct kernel_lb_addr *fileset)
1776 struct udf_sb_info *sbi = UDF_SB(sb);
1780 /* First try user provided anchor */
1781 if (sbi->s_anchor) {
1782 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1787 * according to spec, anchor is in either:
1791 * however, if the disc isn't closed, it could be 512.
1793 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1797 * The trouble is which block is the last one. Drives often misreport
1798 * this so we try various possibilities.
1800 last[last_count++] = *lastblock;
1801 if (*lastblock >= 1)
1802 last[last_count++] = *lastblock - 1;
1803 last[last_count++] = *lastblock + 1;
1804 if (*lastblock >= 2)
1805 last[last_count++] = *lastblock - 2;
1806 if (*lastblock >= 150)
1807 last[last_count++] = *lastblock - 150;
1808 if (*lastblock >= 152)
1809 last[last_count++] = *lastblock - 152;
1811 for (i = 0; i < last_count; i++) {
1812 if (last[i] >= i_size_read(sb->s_bdev->bd_inode) >>
1813 sb->s_blocksize_bits)
1815 ret = udf_check_anchor_block(sb, last[i], fileset);
1816 if (ret != -EAGAIN) {
1818 *lastblock = last[i];
1823 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1824 if (ret != -EAGAIN) {
1826 *lastblock = last[i];
1831 /* Finally try block 512 in case media is open */
1832 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
1836 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1837 * area specified by it. The function expects sbi->s_lastblock to be the last
1838 * block on the media.
1840 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1843 static int udf_find_anchor(struct super_block *sb,
1844 struct kernel_lb_addr *fileset)
1846 struct udf_sb_info *sbi = UDF_SB(sb);
1847 sector_t lastblock = sbi->s_last_block;
1850 ret = udf_scan_anchors(sb, &lastblock, fileset);
1854 /* No anchor found? Try VARCONV conversion of block numbers */
1855 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1856 lastblock = udf_variable_to_fixed(sbi->s_last_block);
1857 /* Firstly, we try to not convert number of the last block */
1858 ret = udf_scan_anchors(sb, &lastblock, fileset);
1862 lastblock = sbi->s_last_block;
1863 /* Secondly, we try with converted number of the last block */
1864 ret = udf_scan_anchors(sb, &lastblock, fileset);
1866 /* VARCONV didn't help. Clear it. */
1867 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1871 sbi->s_last_block = lastblock;
1876 * Check Volume Structure Descriptor, find Anchor block and load Volume
1877 * Descriptor Sequence.
1879 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1880 * block was not found.
1882 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1883 int silent, struct kernel_lb_addr *fileset)
1885 struct udf_sb_info *sbi = UDF_SB(sb);
1889 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1891 udf_warn(sb, "Bad block size\n");
1894 sbi->s_last_block = uopt->lastblock;
1896 /* Check that it is NSR02 compliant */
1897 nsr_off = udf_check_vsd(sb);
1900 udf_warn(sb, "No VRS found\n");
1904 udf_debug("Failed to read sector at offset %d. "
1905 "Assuming open disc. Skipping validity "
1906 "check\n", VSD_FIRST_SECTOR_OFFSET);
1907 if (!sbi->s_last_block)
1908 sbi->s_last_block = udf_get_last_block(sb);
1910 udf_debug("Validity check skipped because of novrs option\n");
1913 /* Look for anchor block and load Volume Descriptor Sequence */
1914 sbi->s_anchor = uopt->anchor;
1915 ret = udf_find_anchor(sb, fileset);
1917 if (!silent && ret == -EAGAIN)
1918 udf_warn(sb, "No anchor found\n");
1924 static void udf_open_lvid(struct super_block *sb)
1926 struct udf_sb_info *sbi = UDF_SB(sb);
1927 struct buffer_head *bh = sbi->s_lvid_bh;
1928 struct logicalVolIntegrityDesc *lvid;
1929 struct logicalVolIntegrityDescImpUse *lvidiu;
1930 struct timespec64 ts;
1934 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1935 lvidiu = udf_sb_lvidiu(sb);
1939 mutex_lock(&sbi->s_alloc_mutex);
1940 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1941 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1942 ktime_get_real_ts64(&ts);
1943 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
1944 if (le32_to_cpu(lvid->integrityType) == LVID_INTEGRITY_TYPE_CLOSE)
1945 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
1947 UDF_SET_FLAG(sb, UDF_FLAG_INCONSISTENT);
1949 lvid->descTag.descCRC = cpu_to_le16(
1950 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1951 le16_to_cpu(lvid->descTag.descCRCLength)));
1953 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1954 mark_buffer_dirty(bh);
1955 sbi->s_lvid_dirty = 0;
1956 mutex_unlock(&sbi->s_alloc_mutex);
1957 /* Make opening of filesystem visible on the media immediately */
1958 sync_dirty_buffer(bh);
1961 static void udf_close_lvid(struct super_block *sb)
1963 struct udf_sb_info *sbi = UDF_SB(sb);
1964 struct buffer_head *bh = sbi->s_lvid_bh;
1965 struct logicalVolIntegrityDesc *lvid;
1966 struct logicalVolIntegrityDescImpUse *lvidiu;
1967 struct timespec64 ts;
1971 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1972 lvidiu = udf_sb_lvidiu(sb);
1976 mutex_lock(&sbi->s_alloc_mutex);
1977 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1978 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1979 ktime_get_real_ts64(&ts);
1980 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
1981 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1982 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1983 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1984 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1985 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1986 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1987 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_INCONSISTENT))
1988 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1990 lvid->descTag.descCRC = cpu_to_le16(
1991 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1992 le16_to_cpu(lvid->descTag.descCRCLength)));
1994 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1996 * We set buffer uptodate unconditionally here to avoid spurious
1997 * warnings from mark_buffer_dirty() when previous EIO has marked
1998 * the buffer as !uptodate
2000 set_buffer_uptodate(bh);
2001 mark_buffer_dirty(bh);
2002 sbi->s_lvid_dirty = 0;
2003 mutex_unlock(&sbi->s_alloc_mutex);
2004 /* Make closing of filesystem visible on the media immediately */
2005 sync_dirty_buffer(bh);
2008 u64 lvid_get_unique_id(struct super_block *sb)
2010 struct buffer_head *bh;
2011 struct udf_sb_info *sbi = UDF_SB(sb);
2012 struct logicalVolIntegrityDesc *lvid;
2013 struct logicalVolHeaderDesc *lvhd;
2017 bh = sbi->s_lvid_bh;
2021 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2022 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2024 mutex_lock(&sbi->s_alloc_mutex);
2025 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2026 if (!(++uniqueID & 0xFFFFFFFF))
2028 lvhd->uniqueID = cpu_to_le64(uniqueID);
2029 mutex_unlock(&sbi->s_alloc_mutex);
2030 mark_buffer_dirty(bh);
2035 static int udf_fill_super(struct super_block *sb, void *options, int silent)
2038 struct inode *inode = NULL;
2039 struct udf_options uopt;
2040 struct kernel_lb_addr rootdir, fileset;
2041 struct udf_sb_info *sbi;
2042 bool lvid_open = false;
2044 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
2045 /* By default we'll use overflow[ug]id when UDF inode [ug]id == -1 */
2046 uopt.uid = make_kuid(current_user_ns(), overflowuid);
2047 uopt.gid = make_kgid(current_user_ns(), overflowgid);
2049 uopt.fmode = UDF_INVALID_MODE;
2050 uopt.dmode = UDF_INVALID_MODE;
2051 uopt.nls_map = NULL;
2053 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
2057 sb->s_fs_info = sbi;
2059 mutex_init(&sbi->s_alloc_mutex);
2061 if (!udf_parse_options((char *)options, &uopt, false))
2062 goto parse_options_failure;
2064 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
2065 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
2066 udf_err(sb, "utf8 cannot be combined with iocharset\n");
2067 goto parse_options_failure;
2069 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
2070 uopt.nls_map = load_nls_default();
2072 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2074 udf_debug("Using default NLS map\n");
2076 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2077 uopt.flags |= (1 << UDF_FLAG_UTF8);
2079 fileset.logicalBlockNum = 0xFFFFFFFF;
2080 fileset.partitionReferenceNum = 0xFFFF;
2082 sbi->s_flags = uopt.flags;
2083 sbi->s_uid = uopt.uid;
2084 sbi->s_gid = uopt.gid;
2085 sbi->s_umask = uopt.umask;
2086 sbi->s_fmode = uopt.fmode;
2087 sbi->s_dmode = uopt.dmode;
2088 sbi->s_nls_map = uopt.nls_map;
2089 rwlock_init(&sbi->s_cred_lock);
2091 if (uopt.session == 0xFFFFFFFF)
2092 sbi->s_session = udf_get_last_session(sb);
2094 sbi->s_session = uopt.session;
2096 udf_debug("Multi-session=%d\n", sbi->s_session);
2098 /* Fill in the rest of the superblock */
2099 sb->s_op = &udf_sb_ops;
2100 sb->s_export_op = &udf_export_ops;
2102 sb->s_magic = UDF_SUPER_MAGIC;
2103 sb->s_time_gran = 1000;
2105 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
2106 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2108 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
2109 while (uopt.blocksize <= 4096) {
2110 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2112 if (!silent && ret != -EACCES) {
2113 pr_notice("Scanning with blocksize %u failed\n",
2116 brelse(sbi->s_lvid_bh);
2117 sbi->s_lvid_bh = NULL;
2119 * EACCES is special - we want to propagate to
2120 * upper layers that we cannot handle RW mount.
2127 uopt.blocksize <<= 1;
2131 if (ret == -EAGAIN) {
2132 udf_warn(sb, "No partition found (1)\n");
2138 udf_debug("Lastblock=%u\n", sbi->s_last_block);
2140 if (sbi->s_lvid_bh) {
2141 struct logicalVolIntegrityDescImpUse *lvidiu =
2143 uint16_t minUDFReadRev;
2144 uint16_t minUDFWriteRev;
2150 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2151 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
2152 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
2153 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
2155 UDF_MAX_READ_VERSION);
2158 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2164 sbi->s_udfrev = minUDFWriteRev;
2166 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2167 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2168 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2169 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2172 if (!sbi->s_partitions) {
2173 udf_warn(sb, "No partition found (2)\n");
2178 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2179 UDF_PART_FLAG_READ_ONLY &&
2185 if (udf_find_fileset(sb, &fileset, &rootdir)) {
2186 udf_warn(sb, "No fileset found\n");
2192 struct timestamp ts;
2193 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2194 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2195 sbi->s_volume_ident,
2196 le16_to_cpu(ts.year), ts.month, ts.day,
2197 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2199 if (!sb_rdonly(sb)) {
2204 /* Assign the root inode */
2205 /* assign inodes by physical block number */
2206 /* perhaps it's not extensible enough, but for now ... */
2207 inode = udf_iget(sb, &rootdir);
2208 if (IS_ERR(inode)) {
2209 udf_err(sb, "Error in udf_iget, block=%u, partition=%u\n",
2210 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2211 ret = PTR_ERR(inode);
2215 /* Allocate a dentry for the root inode */
2216 sb->s_root = d_make_root(inode);
2218 udf_err(sb, "Couldn't allocate root dentry\n");
2222 sb->s_maxbytes = MAX_LFS_FILESIZE;
2223 sb->s_max_links = UDF_MAX_LINKS;
2227 iput(sbi->s_vat_inode);
2228 parse_options_failure:
2230 unload_nls(uopt.nls_map);
2233 brelse(sbi->s_lvid_bh);
2234 udf_sb_free_partitions(sb);
2236 sb->s_fs_info = NULL;
2241 void _udf_err(struct super_block *sb, const char *function,
2242 const char *fmt, ...)
2244 struct va_format vaf;
2247 va_start(args, fmt);
2252 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2257 void _udf_warn(struct super_block *sb, const char *function,
2258 const char *fmt, ...)
2260 struct va_format vaf;
2263 va_start(args, fmt);
2268 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2273 static void udf_put_super(struct super_block *sb)
2275 struct udf_sb_info *sbi;
2279 iput(sbi->s_vat_inode);
2280 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2281 unload_nls(sbi->s_nls_map);
2284 brelse(sbi->s_lvid_bh);
2285 udf_sb_free_partitions(sb);
2286 mutex_destroy(&sbi->s_alloc_mutex);
2287 kfree(sb->s_fs_info);
2288 sb->s_fs_info = NULL;
2291 static int udf_sync_fs(struct super_block *sb, int wait)
2293 struct udf_sb_info *sbi = UDF_SB(sb);
2295 mutex_lock(&sbi->s_alloc_mutex);
2296 if (sbi->s_lvid_dirty) {
2298 * Blockdevice will be synced later so we don't have to submit
2301 mark_buffer_dirty(sbi->s_lvid_bh);
2302 sbi->s_lvid_dirty = 0;
2304 mutex_unlock(&sbi->s_alloc_mutex);
2309 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2311 struct super_block *sb = dentry->d_sb;
2312 struct udf_sb_info *sbi = UDF_SB(sb);
2313 struct logicalVolIntegrityDescImpUse *lvidiu;
2314 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2316 lvidiu = udf_sb_lvidiu(sb);
2317 buf->f_type = UDF_SUPER_MAGIC;
2318 buf->f_bsize = sb->s_blocksize;
2319 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2320 buf->f_bfree = udf_count_free(sb);
2321 buf->f_bavail = buf->f_bfree;
2322 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2323 le32_to_cpu(lvidiu->numDirs)) : 0)
2325 buf->f_ffree = buf->f_bfree;
2326 buf->f_namelen = UDF_NAME_LEN;
2327 buf->f_fsid.val[0] = (u32)id;
2328 buf->f_fsid.val[1] = (u32)(id >> 32);
2333 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2334 struct udf_bitmap *bitmap)
2336 struct buffer_head *bh = NULL;
2337 unsigned int accum = 0;
2339 udf_pblk_t block = 0, newblock;
2340 struct kernel_lb_addr loc;
2344 struct spaceBitmapDesc *bm;
2346 loc.logicalBlockNum = bitmap->s_extPosition;
2347 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2348 bh = udf_read_ptagged(sb, &loc, 0, &ident);
2351 udf_err(sb, "udf_count_free failed\n");
2353 } else if (ident != TAG_IDENT_SBD) {
2355 udf_err(sb, "udf_count_free failed\n");
2359 bm = (struct spaceBitmapDesc *)bh->b_data;
2360 bytes = le32_to_cpu(bm->numOfBytes);
2361 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2362 ptr = (uint8_t *)bh->b_data;
2365 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2366 accum += bitmap_weight((const unsigned long *)(ptr + index),
2371 newblock = udf_get_lb_pblock(sb, &loc, ++block);
2372 bh = udf_tread(sb, newblock);
2374 udf_debug("read failed\n");
2378 ptr = (uint8_t *)bh->b_data;
2386 static unsigned int udf_count_free_table(struct super_block *sb,
2387 struct inode *table)
2389 unsigned int accum = 0;
2391 struct kernel_lb_addr eloc;
2393 struct extent_position epos;
2395 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
2396 epos.block = UDF_I(table)->i_location;
2397 epos.offset = sizeof(struct unallocSpaceEntry);
2400 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2401 accum += (elen >> table->i_sb->s_blocksize_bits);
2404 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
2409 static unsigned int udf_count_free(struct super_block *sb)
2411 unsigned int accum = 0;
2412 struct udf_sb_info *sbi;
2413 struct udf_part_map *map;
2416 if (sbi->s_lvid_bh) {
2417 struct logicalVolIntegrityDesc *lvid =
2418 (struct logicalVolIntegrityDesc *)
2419 sbi->s_lvid_bh->b_data;
2420 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2421 accum = le32_to_cpu(
2422 lvid->freeSpaceTable[sbi->s_partition]);
2423 if (accum == 0xFFFFFFFF)
2431 map = &sbi->s_partmaps[sbi->s_partition];
2432 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2433 accum += udf_count_free_bitmap(sb,
2434 map->s_uspace.s_bitmap);
2436 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2437 accum += udf_count_free_bitmap(sb,
2438 map->s_fspace.s_bitmap);
2443 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2444 accum += udf_count_free_table(sb,
2445 map->s_uspace.s_table);
2447 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2448 accum += udf_count_free_table(sb,
2449 map->s_fspace.s_table);
2455 MODULE_AUTHOR("Ben Fennema");
2456 MODULE_DESCRIPTION("Universal Disk Format Filesystem");
2457 MODULE_LICENSE("GPL");
2458 module_init(init_udf_fs)
2459 module_exit(exit_udf_fs)