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/
14 * https://www.ecma.ch/
15 * https://www.iso.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 void udf_open_lvid(struct super_block *);
96 static void udf_close_lvid(struct super_block *);
97 static unsigned int udf_count_free(struct super_block *);
98 static int udf_statfs(struct dentry *, struct kstatfs *);
99 static int udf_show_options(struct seq_file *, struct dentry *);
101 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
103 struct logicalVolIntegrityDesc *lvid;
104 unsigned int partnum;
107 if (!UDF_SB(sb)->s_lvid_bh)
109 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
110 partnum = le32_to_cpu(lvid->numOfPartitions);
111 /* The offset is to skip freeSpaceTable and sizeTable arrays */
112 offset = partnum * 2 * sizeof(uint32_t);
113 return (struct logicalVolIntegrityDescImpUse *)
114 (((uint8_t *)(lvid + 1)) + offset);
117 /* UDF filesystem type */
118 static struct dentry *udf_mount(struct file_system_type *fs_type,
119 int flags, const char *dev_name, void *data)
121 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
124 static struct file_system_type udf_fstype = {
125 .owner = THIS_MODULE,
128 .kill_sb = kill_block_super,
129 .fs_flags = FS_REQUIRES_DEV,
131 MODULE_ALIAS_FS("udf");
133 static struct kmem_cache *udf_inode_cachep;
135 static struct inode *udf_alloc_inode(struct super_block *sb)
137 struct udf_inode_info *ei;
138 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
143 ei->i_lenExtents = 0;
144 ei->i_lenStreams = 0;
145 ei->i_next_alloc_block = 0;
146 ei->i_next_alloc_goal = 0;
149 init_rwsem(&ei->i_data_sem);
150 ei->cached_extent.lstart = -1;
151 spin_lock_init(&ei->i_extent_cache_lock);
153 return &ei->vfs_inode;
156 static void udf_free_in_core_inode(struct inode *inode)
158 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
161 static void init_once(void *foo)
163 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
166 inode_init_once(&ei->vfs_inode);
169 static int __init init_inodecache(void)
171 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
172 sizeof(struct udf_inode_info),
173 0, (SLAB_RECLAIM_ACCOUNT |
177 if (!udf_inode_cachep)
182 static void destroy_inodecache(void)
185 * Make sure all delayed rcu free inodes are flushed before we
189 kmem_cache_destroy(udf_inode_cachep);
192 /* Superblock operations */
193 static const struct super_operations udf_sb_ops = {
194 .alloc_inode = udf_alloc_inode,
195 .free_inode = udf_free_in_core_inode,
196 .write_inode = udf_write_inode,
197 .evict_inode = udf_evict_inode,
198 .put_super = udf_put_super,
199 .sync_fs = udf_sync_fs,
200 .statfs = udf_statfs,
201 .remount_fs = udf_remount_fs,
202 .show_options = udf_show_options,
207 unsigned int blocksize;
208 unsigned int session;
209 unsigned int lastblock;
217 struct nls_table *nls_map;
220 static int __init init_udf_fs(void)
224 err = init_inodecache();
227 err = register_filesystem(&udf_fstype);
234 destroy_inodecache();
240 static void __exit exit_udf_fs(void)
242 unregister_filesystem(&udf_fstype);
243 destroy_inodecache();
246 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
248 struct udf_sb_info *sbi = UDF_SB(sb);
250 sbi->s_partmaps = kcalloc(count, sizeof(*sbi->s_partmaps), GFP_KERNEL);
251 if (!sbi->s_partmaps) {
252 sbi->s_partitions = 0;
256 sbi->s_partitions = count;
260 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
263 int nr_groups = bitmap->s_nr_groups;
265 for (i = 0; i < nr_groups; i++)
266 brelse(bitmap->s_block_bitmap[i]);
271 static void udf_free_partition(struct udf_part_map *map)
274 struct udf_meta_data *mdata;
276 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
277 iput(map->s_uspace.s_table);
278 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
279 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
280 if (map->s_partition_type == UDF_SPARABLE_MAP15)
281 for (i = 0; i < 4; i++)
282 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
283 else if (map->s_partition_type == UDF_METADATA_MAP25) {
284 mdata = &map->s_type_specific.s_metadata;
285 iput(mdata->s_metadata_fe);
286 mdata->s_metadata_fe = NULL;
288 iput(mdata->s_mirror_fe);
289 mdata->s_mirror_fe = NULL;
291 iput(mdata->s_bitmap_fe);
292 mdata->s_bitmap_fe = NULL;
296 static void udf_sb_free_partitions(struct super_block *sb)
298 struct udf_sb_info *sbi = UDF_SB(sb);
301 if (!sbi->s_partmaps)
303 for (i = 0; i < sbi->s_partitions; i++)
304 udf_free_partition(&sbi->s_partmaps[i]);
305 kfree(sbi->s_partmaps);
306 sbi->s_partmaps = NULL;
309 static int udf_show_options(struct seq_file *seq, struct dentry *root)
311 struct super_block *sb = root->d_sb;
312 struct udf_sb_info *sbi = UDF_SB(sb);
314 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
315 seq_puts(seq, ",nostrict");
316 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
317 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
318 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
319 seq_puts(seq, ",unhide");
320 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
321 seq_puts(seq, ",undelete");
322 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
323 seq_puts(seq, ",noadinicb");
324 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
325 seq_puts(seq, ",shortad");
326 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
327 seq_puts(seq, ",uid=forget");
328 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
329 seq_puts(seq, ",gid=forget");
330 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
331 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
332 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
333 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
334 if (sbi->s_umask != 0)
335 seq_printf(seq, ",umask=%ho", sbi->s_umask);
336 if (sbi->s_fmode != UDF_INVALID_MODE)
337 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
338 if (sbi->s_dmode != UDF_INVALID_MODE)
339 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
340 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
341 seq_printf(seq, ",session=%d", sbi->s_session);
342 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
343 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
344 if (sbi->s_anchor != 0)
345 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
347 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
349 seq_puts(seq, ",iocharset=utf8");
358 * Parse mount options.
361 * The following mount options are supported:
363 * gid= Set the default group.
364 * umask= Set the default umask.
365 * mode= Set the default file permissions.
366 * dmode= Set the default directory permissions.
367 * uid= Set the default user.
368 * bs= Set the block size.
369 * unhide Show otherwise hidden files.
370 * undelete Show deleted files in lists.
371 * adinicb Embed data in the inode (default)
372 * noadinicb Don't embed data in the inode
373 * shortad Use short ad's
374 * longad Use long ad's (default)
375 * nostrict Unset strict conformance
376 * iocharset= Set the NLS character set
378 * The remaining are for debugging and disaster recovery:
380 * novrs Skip volume sequence recognition
382 * The following expect a offset from 0.
384 * session= Set the CDROM session (default= last session)
385 * anchor= Override standard anchor location. (default= 256)
386 * volume= Override the VolumeDesc location. (unused)
387 * partition= Override the PartitionDesc location. (unused)
388 * lastblock= Set the last block of the filesystem/
390 * The following expect a offset from the partition root.
392 * fileset= Override the fileset block location. (unused)
393 * rootdir= Override the root directory location. (unused)
394 * WARNING: overriding the rootdir to a non-directory may
395 * yield highly unpredictable results.
398 * options Pointer to mount options string.
399 * uopts Pointer to mount options variable.
402 * <return> 1 Mount options parsed okay.
403 * <return> 0 Error parsing mount options.
406 * July 1, 1997 - Andrew E. Mileski
407 * Written, tested, and released.
411 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
412 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
413 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
414 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
415 Opt_rootdir, Opt_utf8, Opt_iocharset,
416 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
420 static const match_table_t tokens = {
421 {Opt_novrs, "novrs"},
422 {Opt_nostrict, "nostrict"},
424 {Opt_unhide, "unhide"},
425 {Opt_undelete, "undelete"},
426 {Opt_noadinicb, "noadinicb"},
427 {Opt_adinicb, "adinicb"},
428 {Opt_shortad, "shortad"},
429 {Opt_longad, "longad"},
430 {Opt_uforget, "uid=forget"},
431 {Opt_uignore, "uid=ignore"},
432 {Opt_gforget, "gid=forget"},
433 {Opt_gignore, "gid=ignore"},
436 {Opt_umask, "umask=%o"},
437 {Opt_session, "session=%u"},
438 {Opt_lastblock, "lastblock=%u"},
439 {Opt_anchor, "anchor=%u"},
440 {Opt_volume, "volume=%u"},
441 {Opt_partition, "partition=%u"},
442 {Opt_fileset, "fileset=%u"},
443 {Opt_rootdir, "rootdir=%u"},
445 {Opt_iocharset, "iocharset=%s"},
446 {Opt_fmode, "mode=%o"},
447 {Opt_dmode, "dmode=%o"},
451 static int udf_parse_options(char *options, struct udf_options *uopt,
459 uopt->session = 0xFFFFFFFF;
466 while ((p = strsep(&options, ",")) != NULL) {
467 substring_t args[MAX_OPT_ARGS];
473 token = match_token(p, tokens, args);
479 if (match_int(&args[0], &option))
482 if (n != 512 && n != 1024 && n != 2048 && n != 4096)
485 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
488 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
491 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
494 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
497 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
500 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
503 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
506 if (match_uint(args, &uv))
508 uopt->gid = make_kgid(current_user_ns(), uv);
509 if (!gid_valid(uopt->gid))
511 uopt->flags |= (1 << UDF_FLAG_GID_SET);
514 if (match_uint(args, &uv))
516 uopt->uid = make_kuid(current_user_ns(), uv);
517 if (!uid_valid(uopt->uid))
519 uopt->flags |= (1 << UDF_FLAG_UID_SET);
522 if (match_octal(args, &option))
524 uopt->umask = option;
527 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
530 if (match_int(args, &option))
532 uopt->session = option;
534 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
537 if (match_int(args, &option))
539 uopt->lastblock = option;
541 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
544 if (match_int(args, &option))
546 uopt->anchor = option;
552 /* Ignored (never implemented properly) */
556 unload_nls(uopt->nls_map);
557 uopt->nls_map = NULL;
562 unload_nls(uopt->nls_map);
563 uopt->nls_map = NULL;
565 /* When nls_map is not loaded then UTF-8 is used */
566 if (!remount && strcmp(args[0].from, "utf8") != 0) {
567 uopt->nls_map = load_nls(args[0].from);
568 if (!uopt->nls_map) {
569 pr_err("iocharset %s not found\n",
576 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
580 /* These options are superseeded by uid=<number> */
583 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
586 if (match_octal(args, &option))
588 uopt->fmode = option & 0777;
591 if (match_octal(args, &option))
593 uopt->dmode = option & 0777;
596 pr_err("bad mount option \"%s\" or missing value\n", p);
603 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
605 struct udf_options uopt;
606 struct udf_sb_info *sbi = UDF_SB(sb);
609 if (!(*flags & SB_RDONLY) && UDF_QUERY_FLAG(sb, UDF_FLAG_RW_INCOMPAT))
614 uopt.flags = sbi->s_flags;
615 uopt.uid = sbi->s_uid;
616 uopt.gid = sbi->s_gid;
617 uopt.umask = sbi->s_umask;
618 uopt.fmode = sbi->s_fmode;
619 uopt.dmode = sbi->s_dmode;
622 if (!udf_parse_options(options, &uopt, true))
625 write_lock(&sbi->s_cred_lock);
626 sbi->s_flags = uopt.flags;
627 sbi->s_uid = uopt.uid;
628 sbi->s_gid = uopt.gid;
629 sbi->s_umask = uopt.umask;
630 sbi->s_fmode = uopt.fmode;
631 sbi->s_dmode = uopt.dmode;
632 write_unlock(&sbi->s_cred_lock);
634 if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb))
637 if (*flags & SB_RDONLY)
647 * Check VSD descriptor. Returns -1 in case we are at the end of volume
648 * recognition area, 0 if the descriptor is valid but non-interesting, 1 if
649 * we found one of NSR descriptors we are looking for.
651 static int identify_vsd(const struct volStructDesc *vsd)
655 if (!memcmp(vsd->stdIdent, VSD_STD_ID_CD001, VSD_STD_ID_LEN)) {
656 switch (vsd->structType) {
658 udf_debug("ISO9660 Boot Record found\n");
661 udf_debug("ISO9660 Primary Volume Descriptor found\n");
664 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
667 udf_debug("ISO9660 Volume Partition Descriptor found\n");
670 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
673 udf_debug("ISO9660 VRS (%u) found\n", vsd->structType);
676 } else if (!memcmp(vsd->stdIdent, VSD_STD_ID_BEA01, VSD_STD_ID_LEN))
678 else if (!memcmp(vsd->stdIdent, VSD_STD_ID_NSR02, VSD_STD_ID_LEN))
680 else if (!memcmp(vsd->stdIdent, VSD_STD_ID_NSR03, VSD_STD_ID_LEN))
682 else if (!memcmp(vsd->stdIdent, VSD_STD_ID_BOOT2, VSD_STD_ID_LEN))
684 else if (!memcmp(vsd->stdIdent, VSD_STD_ID_CDW02, VSD_STD_ID_LEN))
687 /* TEA01 or invalid id : end of volume recognition area */
695 * Check Volume Structure Descriptors (ECMA 167 2/9.1)
696 * We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1)
697 * @return 1 if NSR02 or NSR03 found,
698 * -1 if first sector read error, 0 otherwise
700 static int udf_check_vsd(struct super_block *sb)
702 struct volStructDesc *vsd = NULL;
703 loff_t sector = VSD_FIRST_SECTOR_OFFSET;
705 struct buffer_head *bh = NULL;
707 struct udf_sb_info *sbi;
708 loff_t session_offset;
711 if (sb->s_blocksize < sizeof(struct volStructDesc))
712 sectorsize = sizeof(struct volStructDesc);
714 sectorsize = sb->s_blocksize;
716 session_offset = (loff_t)sbi->s_session << sb->s_blocksize_bits;
717 sector += session_offset;
719 udf_debug("Starting at sector %u (%lu byte sectors)\n",
720 (unsigned int)(sector >> sb->s_blocksize_bits),
722 /* Process the sequence (if applicable). The hard limit on the sector
723 * offset is arbitrary, hopefully large enough so that all valid UDF
724 * filesystems will be recognised. There is no mention of an upper
725 * bound to the size of the volume recognition area in the standard.
726 * The limit will prevent the code to read all the sectors of a
727 * specially crafted image (like a bluray disc full of CD001 sectors),
728 * potentially causing minutes or even hours of uninterruptible I/O
729 * activity. This actually happened with uninitialised SSD partitions
730 * (all 0xFF) before the check for the limit and all valid IDs were
732 for (; !nsr && sector < VSD_MAX_SECTOR_OFFSET; sector += sectorsize) {
734 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
738 vsd = (struct volStructDesc *)(bh->b_data +
739 (sector & (sb->s_blocksize - 1)));
740 nsr = identify_vsd(vsd);
741 /* Found NSR or end? */
747 * Special handling for improperly formatted VRS (e.g., Win10)
748 * where components are separated by 2048 bytes even though
751 if (sb->s_blocksize == 4096) {
752 nsr = identify_vsd(vsd + 1);
753 /* Ignore unknown IDs... */
762 else if (!bh && sector - session_offset == VSD_FIRST_SECTOR_OFFSET)
768 static int udf_verify_domain_identifier(struct super_block *sb,
769 struct regid *ident, char *dname)
771 struct domainIdentSuffix *suffix;
773 if (memcmp(ident->ident, UDF_ID_COMPLIANT, strlen(UDF_ID_COMPLIANT))) {
774 udf_warn(sb, "Not OSTA UDF compliant %s descriptor.\n", dname);
777 if (ident->flags & ENTITYID_FLAGS_DIRTY) {
778 udf_warn(sb, "Possibly not OSTA UDF compliant %s descriptor.\n",
782 suffix = (struct domainIdentSuffix *)ident->identSuffix;
783 if ((suffix->domainFlags & DOMAIN_FLAGS_HARD_WRITE_PROTECT) ||
784 (suffix->domainFlags & DOMAIN_FLAGS_SOFT_WRITE_PROTECT)) {
785 if (!sb_rdonly(sb)) {
786 udf_warn(sb, "Descriptor for %s marked write protected."
787 " Forcing read only mount.\n", dname);
796 UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
800 static int udf_load_fileset(struct super_block *sb, struct fileSetDesc *fset,
801 struct kernel_lb_addr *root)
805 ret = udf_verify_domain_identifier(sb, &fset->domainIdent, "file set");
809 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
810 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
812 udf_debug("Rootdir at block=%u, partition=%u\n",
813 root->logicalBlockNum, root->partitionReferenceNum);
817 static int udf_find_fileset(struct super_block *sb,
818 struct kernel_lb_addr *fileset,
819 struct kernel_lb_addr *root)
821 struct buffer_head *bh = NULL;
825 if (fileset->logicalBlockNum == 0xFFFFFFFF &&
826 fileset->partitionReferenceNum == 0xFFFF)
829 bh = udf_read_ptagged(sb, fileset, 0, &ident);
832 if (ident != TAG_IDENT_FSD) {
837 udf_debug("Fileset at block=%u, partition=%u\n",
838 fileset->logicalBlockNum, fileset->partitionReferenceNum);
840 UDF_SB(sb)->s_partition = fileset->partitionReferenceNum;
841 ret = udf_load_fileset(sb, (struct fileSetDesc *)bh->b_data, root);
847 * Load primary Volume Descriptor Sequence
849 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
852 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
854 struct primaryVolDesc *pvoldesc;
856 struct buffer_head *bh;
859 struct timestamp *ts;
861 outstr = kmalloc(128, GFP_NOFS);
865 bh = udf_read_tagged(sb, block, block, &ident);
871 if (ident != TAG_IDENT_PVD) {
876 pvoldesc = (struct primaryVolDesc *)bh->b_data;
878 udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
879 pvoldesc->recordingDateAndTime);
880 ts = &pvoldesc->recordingDateAndTime;
881 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
882 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
883 ts->minute, le16_to_cpu(ts->typeAndTimezone));
885 ret = udf_dstrCS0toChar(sb, outstr, 31, pvoldesc->volIdent, 32);
887 strcpy(UDF_SB(sb)->s_volume_ident, "InvalidName");
888 pr_warn("incorrect volume identification, setting to "
891 strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret);
893 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
895 ret = udf_dstrCS0toChar(sb, outstr, 127, pvoldesc->volSetIdent, 128);
901 udf_debug("volSetIdent[] = '%s'\n", outstr);
911 struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
912 u32 meta_file_loc, u32 partition_ref)
914 struct kernel_lb_addr addr;
915 struct inode *metadata_fe;
917 addr.logicalBlockNum = meta_file_loc;
918 addr.partitionReferenceNum = partition_ref;
920 metadata_fe = udf_iget_special(sb, &addr);
922 if (IS_ERR(metadata_fe)) {
923 udf_warn(sb, "metadata inode efe not found\n");
926 if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
927 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
929 return ERR_PTR(-EIO);
935 static int udf_load_metadata_files(struct super_block *sb, int partition,
938 struct udf_sb_info *sbi = UDF_SB(sb);
939 struct udf_part_map *map;
940 struct udf_meta_data *mdata;
941 struct kernel_lb_addr addr;
944 map = &sbi->s_partmaps[partition];
945 mdata = &map->s_type_specific.s_metadata;
946 mdata->s_phys_partition_ref = type1_index;
948 /* metadata address */
949 udf_debug("Metadata file location: block = %u part = %u\n",
950 mdata->s_meta_file_loc, mdata->s_phys_partition_ref);
952 fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc,
953 mdata->s_phys_partition_ref);
955 /* mirror file entry */
956 udf_debug("Mirror metadata file location: block = %u part = %u\n",
957 mdata->s_mirror_file_loc, mdata->s_phys_partition_ref);
959 fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc,
960 mdata->s_phys_partition_ref);
963 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
966 mdata->s_mirror_fe = fe;
968 mdata->s_metadata_fe = fe;
974 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
976 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
977 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
978 addr.partitionReferenceNum = mdata->s_phys_partition_ref;
980 udf_debug("Bitmap file location: block = %u part = %u\n",
981 addr.logicalBlockNum, addr.partitionReferenceNum);
983 fe = udf_iget_special(sb, &addr);
986 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
988 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
992 mdata->s_bitmap_fe = fe;
995 udf_debug("udf_load_metadata_files Ok\n");
999 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1001 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
1002 return DIV_ROUND_UP(map->s_partition_len +
1003 (sizeof(struct spaceBitmapDesc) << 3),
1004 sb->s_blocksize * 8);
1007 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1009 struct udf_bitmap *bitmap;
1010 int nr_groups = udf_compute_nr_groups(sb, index);
1012 bitmap = kvzalloc(struct_size(bitmap, s_block_bitmap, nr_groups),
1017 bitmap->s_nr_groups = nr_groups;
1021 static int check_partition_desc(struct super_block *sb,
1022 struct partitionDesc *p,
1023 struct udf_part_map *map)
1025 bool umap, utable, fmap, ftable;
1026 struct partitionHeaderDesc *phd;
1028 switch (le32_to_cpu(p->accessType)) {
1029 case PD_ACCESS_TYPE_READ_ONLY:
1030 case PD_ACCESS_TYPE_WRITE_ONCE:
1031 case PD_ACCESS_TYPE_NONE:
1035 /* No Partition Header Descriptor? */
1036 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1037 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1040 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1041 utable = phd->unallocSpaceTable.extLength;
1042 umap = phd->unallocSpaceBitmap.extLength;
1043 ftable = phd->freedSpaceTable.extLength;
1044 fmap = phd->freedSpaceBitmap.extLength;
1046 /* No allocation info? */
1047 if (!utable && !umap && !ftable && !fmap)
1050 /* We don't support blocks that require erasing before overwrite */
1053 /* UDF 2.60: 2.3.3 - no mixing of tables & bitmaps, no VAT. */
1057 if (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1058 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1059 map->s_partition_type == UDF_METADATA_MAP25)
1066 UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
1070 static int udf_fill_partdesc_info(struct super_block *sb,
1071 struct partitionDesc *p, int p_index)
1073 struct udf_part_map *map;
1074 struct udf_sb_info *sbi = UDF_SB(sb);
1075 struct partitionHeaderDesc *phd;
1078 map = &sbi->s_partmaps[p_index];
1080 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1081 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1083 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1084 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1085 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1086 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1087 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1088 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1089 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1090 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1092 udf_debug("Partition (%d type %x) starts at physical %u, block length %u\n",
1093 p_index, map->s_partition_type,
1094 map->s_partition_root, map->s_partition_len);
1096 err = check_partition_desc(sb, p, map);
1101 * Skip loading allocation info it we cannot ever write to the fs.
1102 * This is a correctness thing as we may have decided to force ro mount
1103 * to avoid allocation info we don't support.
1105 if (UDF_QUERY_FLAG(sb, UDF_FLAG_RW_INCOMPAT))
1108 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1109 if (phd->unallocSpaceTable.extLength) {
1110 struct kernel_lb_addr loc = {
1111 .logicalBlockNum = le32_to_cpu(
1112 phd->unallocSpaceTable.extPosition),
1113 .partitionReferenceNum = p_index,
1115 struct inode *inode;
1117 inode = udf_iget_special(sb, &loc);
1118 if (IS_ERR(inode)) {
1119 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1121 return PTR_ERR(inode);
1123 map->s_uspace.s_table = inode;
1124 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1125 udf_debug("unallocSpaceTable (part %d) @ %lu\n",
1126 p_index, map->s_uspace.s_table->i_ino);
1129 if (phd->unallocSpaceBitmap.extLength) {
1130 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1133 map->s_uspace.s_bitmap = bitmap;
1134 bitmap->s_extPosition = le32_to_cpu(
1135 phd->unallocSpaceBitmap.extPosition);
1136 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1137 udf_debug("unallocSpaceBitmap (part %d) @ %u\n",
1138 p_index, bitmap->s_extPosition);
1144 static void udf_find_vat_block(struct super_block *sb, int p_index,
1145 int type1_index, sector_t start_block)
1147 struct udf_sb_info *sbi = UDF_SB(sb);
1148 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1150 struct kernel_lb_addr ino;
1151 struct inode *inode;
1154 * VAT file entry is in the last recorded block. Some broken disks have
1155 * it a few blocks before so try a bit harder...
1157 ino.partitionReferenceNum = type1_index;
1158 for (vat_block = start_block;
1159 vat_block >= map->s_partition_root &&
1160 vat_block >= start_block - 3; vat_block--) {
1161 ino.logicalBlockNum = vat_block - map->s_partition_root;
1162 inode = udf_iget_special(sb, &ino);
1163 if (!IS_ERR(inode)) {
1164 sbi->s_vat_inode = inode;
1170 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1172 struct udf_sb_info *sbi = UDF_SB(sb);
1173 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1174 struct buffer_head *bh = NULL;
1175 struct udf_inode_info *vati;
1177 struct virtualAllocationTable20 *vat20;
1178 sector_t blocks = i_size_read(sb->s_bdev->bd_inode) >>
1179 sb->s_blocksize_bits;
1181 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
1182 if (!sbi->s_vat_inode &&
1183 sbi->s_last_block != blocks - 1) {
1184 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1185 (unsigned long)sbi->s_last_block,
1186 (unsigned long)blocks - 1);
1187 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
1189 if (!sbi->s_vat_inode)
1192 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1193 map->s_type_specific.s_virtual.s_start_offset = 0;
1194 map->s_type_specific.s_virtual.s_num_entries =
1195 (sbi->s_vat_inode->i_size - 36) >> 2;
1196 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1197 vati = UDF_I(sbi->s_vat_inode);
1198 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1199 pos = udf_block_map(sbi->s_vat_inode, 0);
1200 bh = sb_bread(sb, pos);
1203 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1205 vat20 = (struct virtualAllocationTable20 *)
1209 map->s_type_specific.s_virtual.s_start_offset =
1210 le16_to_cpu(vat20->lengthHeader);
1211 map->s_type_specific.s_virtual.s_num_entries =
1212 (sbi->s_vat_inode->i_size -
1213 map->s_type_specific.s_virtual.
1214 s_start_offset) >> 2;
1221 * Load partition descriptor block
1223 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1226 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1228 struct buffer_head *bh;
1229 struct partitionDesc *p;
1230 struct udf_part_map *map;
1231 struct udf_sb_info *sbi = UDF_SB(sb);
1233 uint16_t partitionNumber;
1237 bh = udf_read_tagged(sb, block, block, &ident);
1240 if (ident != TAG_IDENT_PD) {
1245 p = (struct partitionDesc *)bh->b_data;
1246 partitionNumber = le16_to_cpu(p->partitionNumber);
1248 /* First scan for TYPE1 and SPARABLE partitions */
1249 for (i = 0; i < sbi->s_partitions; i++) {
1250 map = &sbi->s_partmaps[i];
1251 udf_debug("Searching map: (%u == %u)\n",
1252 map->s_partition_num, partitionNumber);
1253 if (map->s_partition_num == partitionNumber &&
1254 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1255 map->s_partition_type == UDF_SPARABLE_MAP15))
1259 if (i >= sbi->s_partitions) {
1260 udf_debug("Partition (%u) not found in partition map\n",
1266 ret = udf_fill_partdesc_info(sb, p, i);
1271 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1272 * PHYSICAL partitions are already set up
1275 map = NULL; /* supress 'maybe used uninitialized' warning */
1276 for (i = 0; i < sbi->s_partitions; i++) {
1277 map = &sbi->s_partmaps[i];
1279 if (map->s_partition_num == partitionNumber &&
1280 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1281 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1282 map->s_partition_type == UDF_METADATA_MAP25))
1286 if (i >= sbi->s_partitions) {
1291 ret = udf_fill_partdesc_info(sb, p, i);
1295 if (map->s_partition_type == UDF_METADATA_MAP25) {
1296 ret = udf_load_metadata_files(sb, i, type1_idx);
1298 udf_err(sb, "error loading MetaData partition map %d\n",
1304 * If we have a partition with virtual map, we don't handle
1305 * writing to it (we overwrite blocks instead of relocating
1308 if (!sb_rdonly(sb)) {
1312 UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
1313 ret = udf_load_vat(sb, i, type1_idx);
1319 /* In case loading failed, we handle cleanup in udf_fill_super */
1324 static int udf_load_sparable_map(struct super_block *sb,
1325 struct udf_part_map *map,
1326 struct sparablePartitionMap *spm)
1330 struct sparingTable *st;
1331 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1333 struct buffer_head *bh;
1335 map->s_partition_type = UDF_SPARABLE_MAP15;
1336 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1337 if (!is_power_of_2(sdata->s_packet_len)) {
1338 udf_err(sb, "error loading logical volume descriptor: "
1339 "Invalid packet length %u\n",
1340 (unsigned)sdata->s_packet_len);
1343 if (spm->numSparingTables > 4) {
1344 udf_err(sb, "error loading logical volume descriptor: "
1345 "Too many sparing tables (%d)\n",
1346 (int)spm->numSparingTables);
1349 if (le32_to_cpu(spm->sizeSparingTable) > sb->s_blocksize) {
1350 udf_err(sb, "error loading logical volume descriptor: "
1351 "Too big sparing table size (%u)\n",
1352 le32_to_cpu(spm->sizeSparingTable));
1356 for (i = 0; i < spm->numSparingTables; i++) {
1357 loc = le32_to_cpu(spm->locSparingTable[i]);
1358 bh = udf_read_tagged(sb, loc, loc, &ident);
1362 st = (struct sparingTable *)bh->b_data;
1364 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1365 strlen(UDF_ID_SPARING)) ||
1366 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1372 sdata->s_spar_map[i] = bh;
1374 map->s_partition_func = udf_get_pblock_spar15;
1378 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1379 struct kernel_lb_addr *fileset)
1381 struct logicalVolDesc *lvd;
1384 struct udf_sb_info *sbi = UDF_SB(sb);
1385 struct genericPartitionMap *gpm;
1387 struct buffer_head *bh;
1388 unsigned int table_len;
1391 bh = udf_read_tagged(sb, block, block, &ident);
1394 BUG_ON(ident != TAG_IDENT_LVD);
1395 lvd = (struct logicalVolDesc *)bh->b_data;
1396 table_len = le32_to_cpu(lvd->mapTableLength);
1397 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
1398 udf_err(sb, "error loading logical volume descriptor: "
1399 "Partition table too long (%u > %lu)\n", table_len,
1400 sb->s_blocksize - sizeof(*lvd));
1405 ret = udf_verify_domain_identifier(sb, &lvd->domainIdent,
1409 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1413 for (i = 0, offset = 0;
1414 i < sbi->s_partitions && offset < table_len;
1415 i++, offset += gpm->partitionMapLength) {
1416 struct udf_part_map *map = &sbi->s_partmaps[i];
1417 gpm = (struct genericPartitionMap *)
1418 &(lvd->partitionMaps[offset]);
1419 type = gpm->partitionMapType;
1421 struct genericPartitionMap1 *gpm1 =
1422 (struct genericPartitionMap1 *)gpm;
1423 map->s_partition_type = UDF_TYPE1_MAP15;
1424 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1425 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1426 map->s_partition_func = NULL;
1427 } else if (type == 2) {
1428 struct udfPartitionMap2 *upm2 =
1429 (struct udfPartitionMap2 *)gpm;
1430 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1431 strlen(UDF_ID_VIRTUAL))) {
1433 le16_to_cpu(((__le16 *)upm2->partIdent.
1436 map->s_partition_type =
1438 map->s_partition_func =
1439 udf_get_pblock_virt15;
1441 map->s_partition_type =
1443 map->s_partition_func =
1444 udf_get_pblock_virt20;
1446 } else if (!strncmp(upm2->partIdent.ident,
1448 strlen(UDF_ID_SPARABLE))) {
1449 ret = udf_load_sparable_map(sb, map,
1450 (struct sparablePartitionMap *)gpm);
1453 } else if (!strncmp(upm2->partIdent.ident,
1455 strlen(UDF_ID_METADATA))) {
1456 struct udf_meta_data *mdata =
1457 &map->s_type_specific.s_metadata;
1458 struct metadataPartitionMap *mdm =
1459 (struct metadataPartitionMap *)
1460 &(lvd->partitionMaps[offset]);
1461 udf_debug("Parsing Logical vol part %d type %u id=%s\n",
1462 i, type, UDF_ID_METADATA);
1464 map->s_partition_type = UDF_METADATA_MAP25;
1465 map->s_partition_func = udf_get_pblock_meta25;
1467 mdata->s_meta_file_loc =
1468 le32_to_cpu(mdm->metadataFileLoc);
1469 mdata->s_mirror_file_loc =
1470 le32_to_cpu(mdm->metadataMirrorFileLoc);
1471 mdata->s_bitmap_file_loc =
1472 le32_to_cpu(mdm->metadataBitmapFileLoc);
1473 mdata->s_alloc_unit_size =
1474 le32_to_cpu(mdm->allocUnitSize);
1475 mdata->s_align_unit_size =
1476 le16_to_cpu(mdm->alignUnitSize);
1477 if (mdm->flags & 0x01)
1478 mdata->s_flags |= MF_DUPLICATE_MD;
1480 udf_debug("Metadata Ident suffix=0x%x\n",
1481 le16_to_cpu(*(__le16 *)
1482 mdm->partIdent.identSuffix));
1483 udf_debug("Metadata part num=%u\n",
1484 le16_to_cpu(mdm->partitionNum));
1485 udf_debug("Metadata part alloc unit size=%u\n",
1486 le32_to_cpu(mdm->allocUnitSize));
1487 udf_debug("Metadata file loc=%u\n",
1488 le32_to_cpu(mdm->metadataFileLoc));
1489 udf_debug("Mirror file loc=%u\n",
1490 le32_to_cpu(mdm->metadataMirrorFileLoc));
1491 udf_debug("Bitmap file loc=%u\n",
1492 le32_to_cpu(mdm->metadataBitmapFileLoc));
1493 udf_debug("Flags: %d %u\n",
1494 mdata->s_flags, mdm->flags);
1496 udf_debug("Unknown ident: %s\n",
1497 upm2->partIdent.ident);
1500 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1501 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1503 udf_debug("Partition (%d:%u) type %u on volume %u\n",
1504 i, map->s_partition_num, type, map->s_volumeseqnum);
1508 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1510 *fileset = lelb_to_cpu(la->extLocation);
1511 udf_debug("FileSet found in LogicalVolDesc at block=%u, partition=%u\n",
1512 fileset->logicalBlockNum,
1513 fileset->partitionReferenceNum);
1515 if (lvd->integritySeqExt.extLength)
1516 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1519 if (!sbi->s_lvid_bh) {
1520 /* We can't generate unique IDs without a valid LVID */
1521 if (sb_rdonly(sb)) {
1522 UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
1524 udf_warn(sb, "Damaged or missing LVID, forcing "
1525 "readonly mount\n");
1535 * Find the prevailing Logical Volume Integrity Descriptor.
1537 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1539 struct buffer_head *bh, *final_bh;
1541 struct udf_sb_info *sbi = UDF_SB(sb);
1542 struct logicalVolIntegrityDesc *lvid;
1543 int indirections = 0;
1544 u32 parts, impuselen;
1546 while (++indirections <= UDF_MAX_LVID_NESTING) {
1548 while (loc.extLength > 0 &&
1549 (bh = udf_read_tagged(sb, loc.extLocation,
1550 loc.extLocation, &ident))) {
1551 if (ident != TAG_IDENT_LVID) {
1559 loc.extLength -= sb->s_blocksize;
1566 brelse(sbi->s_lvid_bh);
1567 sbi->s_lvid_bh = final_bh;
1569 lvid = (struct logicalVolIntegrityDesc *)final_bh->b_data;
1570 if (lvid->nextIntegrityExt.extLength == 0)
1573 loc = leea_to_cpu(lvid->nextIntegrityExt);
1576 udf_warn(sb, "Too many LVID indirections (max %u), ignoring.\n",
1577 UDF_MAX_LVID_NESTING);
1579 brelse(sbi->s_lvid_bh);
1580 sbi->s_lvid_bh = NULL;
1583 parts = le32_to_cpu(lvid->numOfPartitions);
1584 impuselen = le32_to_cpu(lvid->lengthOfImpUse);
1585 if (parts >= sb->s_blocksize || impuselen >= sb->s_blocksize ||
1586 sizeof(struct logicalVolIntegrityDesc) + impuselen +
1587 2 * parts * sizeof(u32) > sb->s_blocksize) {
1588 udf_warn(sb, "Corrupted LVID (parts=%u, impuselen=%u), "
1589 "ignoring.\n", parts, impuselen);
1595 * Step for reallocation of table of partition descriptor sequence numbers.
1596 * Must be power of 2.
1598 #define PART_DESC_ALLOC_STEP 32
1600 struct part_desc_seq_scan_data {
1601 struct udf_vds_record rec;
1605 struct desc_seq_scan_data {
1606 struct udf_vds_record vds[VDS_POS_LENGTH];
1607 unsigned int size_part_descs;
1608 unsigned int num_part_descs;
1609 struct part_desc_seq_scan_data *part_descs_loc;
1612 static struct udf_vds_record *handle_partition_descriptor(
1613 struct buffer_head *bh,
1614 struct desc_seq_scan_data *data)
1616 struct partitionDesc *desc = (struct partitionDesc *)bh->b_data;
1620 partnum = le16_to_cpu(desc->partitionNumber);
1621 for (i = 0; i < data->num_part_descs; i++)
1622 if (partnum == data->part_descs_loc[i].partnum)
1623 return &(data->part_descs_loc[i].rec);
1624 if (data->num_part_descs >= data->size_part_descs) {
1625 struct part_desc_seq_scan_data *new_loc;
1626 unsigned int new_size = ALIGN(partnum, PART_DESC_ALLOC_STEP);
1628 new_loc = kcalloc(new_size, sizeof(*new_loc), GFP_KERNEL);
1630 return ERR_PTR(-ENOMEM);
1631 memcpy(new_loc, data->part_descs_loc,
1632 data->size_part_descs * sizeof(*new_loc));
1633 kfree(data->part_descs_loc);
1634 data->part_descs_loc = new_loc;
1635 data->size_part_descs = new_size;
1637 return &(data->part_descs_loc[data->num_part_descs++].rec);
1641 static struct udf_vds_record *get_volume_descriptor_record(uint16_t ident,
1642 struct buffer_head *bh, struct desc_seq_scan_data *data)
1645 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1646 return &(data->vds[VDS_POS_PRIMARY_VOL_DESC]);
1647 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1648 return &(data->vds[VDS_POS_IMP_USE_VOL_DESC]);
1649 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1650 return &(data->vds[VDS_POS_LOGICAL_VOL_DESC]);
1651 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1652 return &(data->vds[VDS_POS_UNALLOC_SPACE_DESC]);
1653 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1654 return handle_partition_descriptor(bh, data);
1660 * Process a main/reserve volume descriptor sequence.
1661 * @block First block of first extent of the sequence.
1662 * @lastblock Lastblock of first extent of the sequence.
1663 * @fileset There we store extent containing root fileset
1665 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1668 static noinline int udf_process_sequence(
1669 struct super_block *sb,
1670 sector_t block, sector_t lastblock,
1671 struct kernel_lb_addr *fileset)
1673 struct buffer_head *bh = NULL;
1674 struct udf_vds_record *curr;
1675 struct generic_desc *gd;
1676 struct volDescPtr *vdp;
1681 unsigned int indirections = 0;
1682 struct desc_seq_scan_data data;
1685 memset(data.vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1686 data.size_part_descs = PART_DESC_ALLOC_STEP;
1687 data.num_part_descs = 0;
1688 data.part_descs_loc = kcalloc(data.size_part_descs,
1689 sizeof(*data.part_descs_loc),
1691 if (!data.part_descs_loc)
1695 * Read the main descriptor sequence and find which descriptors
1698 for (; (!done && block <= lastblock); block++) {
1699 bh = udf_read_tagged(sb, block, block, &ident);
1703 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1704 gd = (struct generic_desc *)bh->b_data;
1705 vdsn = le32_to_cpu(gd->volDescSeqNum);
1707 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1708 if (++indirections > UDF_MAX_TD_NESTING) {
1709 udf_err(sb, "too many Volume Descriptor "
1710 "Pointers (max %u supported)\n",
1711 UDF_MAX_TD_NESTING);
1717 vdp = (struct volDescPtr *)bh->b_data;
1718 block = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation);
1719 lastblock = le32_to_cpu(
1720 vdp->nextVolDescSeqExt.extLength) >>
1721 sb->s_blocksize_bits;
1722 lastblock += block - 1;
1723 /* For loop is going to increment 'block' again */
1726 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1727 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1728 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1729 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1730 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1731 curr = get_volume_descriptor_record(ident, bh, &data);
1734 ret = PTR_ERR(curr);
1737 /* Descriptor we don't care about? */
1740 if (vdsn >= curr->volDescSeqNum) {
1741 curr->volDescSeqNum = vdsn;
1742 curr->block = block;
1745 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1752 * Now read interesting descriptors again and process them
1753 * in a suitable order
1755 if (!data.vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1756 udf_err(sb, "Primary Volume Descriptor not found!\n");
1760 ret = udf_load_pvoldesc(sb, data.vds[VDS_POS_PRIMARY_VOL_DESC].block);
1764 if (data.vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1765 ret = udf_load_logicalvol(sb,
1766 data.vds[VDS_POS_LOGICAL_VOL_DESC].block,
1772 /* Now handle prevailing Partition Descriptors */
1773 for (i = 0; i < data.num_part_descs; i++) {
1774 ret = udf_load_partdesc(sb, data.part_descs_loc[i].rec.block);
1780 kfree(data.part_descs_loc);
1785 * Load Volume Descriptor Sequence described by anchor in bh
1787 * Returns <0 on error, 0 on success
1789 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1790 struct kernel_lb_addr *fileset)
1792 struct anchorVolDescPtr *anchor;
1793 sector_t main_s, main_e, reserve_s, reserve_e;
1796 anchor = (struct anchorVolDescPtr *)bh->b_data;
1798 /* Locate the main sequence */
1799 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1800 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1801 main_e = main_e >> sb->s_blocksize_bits;
1802 main_e += main_s - 1;
1804 /* Locate the reserve sequence */
1805 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1806 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1807 reserve_e = reserve_e >> sb->s_blocksize_bits;
1808 reserve_e += reserve_s - 1;
1810 /* Process the main & reserve sequences */
1811 /* responsible for finding the PartitionDesc(s) */
1812 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1815 udf_sb_free_partitions(sb);
1816 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1818 udf_sb_free_partitions(sb);
1819 /* No sequence was OK, return -EIO */
1827 * Check whether there is an anchor block in the given block and
1828 * load Volume Descriptor Sequence if so.
1830 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1833 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1834 struct kernel_lb_addr *fileset)
1836 struct buffer_head *bh;
1840 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1841 udf_fixed_to_variable(block) >=
1842 i_size_read(sb->s_bdev->bd_inode) >> sb->s_blocksize_bits)
1845 bh = udf_read_tagged(sb, block, block, &ident);
1848 if (ident != TAG_IDENT_AVDP) {
1852 ret = udf_load_sequence(sb, bh, fileset);
1858 * Search for an anchor volume descriptor pointer.
1860 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1863 static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1864 struct kernel_lb_addr *fileset)
1868 struct udf_sb_info *sbi = UDF_SB(sb);
1872 /* First try user provided anchor */
1873 if (sbi->s_anchor) {
1874 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1879 * according to spec, anchor is in either:
1883 * however, if the disc isn't closed, it could be 512.
1885 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1889 * The trouble is which block is the last one. Drives often misreport
1890 * this so we try various possibilities.
1892 last[last_count++] = *lastblock;
1893 if (*lastblock >= 1)
1894 last[last_count++] = *lastblock - 1;
1895 last[last_count++] = *lastblock + 1;
1896 if (*lastblock >= 2)
1897 last[last_count++] = *lastblock - 2;
1898 if (*lastblock >= 150)
1899 last[last_count++] = *lastblock - 150;
1900 if (*lastblock >= 152)
1901 last[last_count++] = *lastblock - 152;
1903 for (i = 0; i < last_count; i++) {
1904 if (last[i] >= i_size_read(sb->s_bdev->bd_inode) >>
1905 sb->s_blocksize_bits)
1907 ret = udf_check_anchor_block(sb, last[i], fileset);
1908 if (ret != -EAGAIN) {
1910 *lastblock = last[i];
1915 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1916 if (ret != -EAGAIN) {
1918 *lastblock = last[i];
1923 /* Finally try block 512 in case media is open */
1924 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
1928 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1929 * area specified by it. The function expects sbi->s_lastblock to be the last
1930 * block on the media.
1932 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1935 static int udf_find_anchor(struct super_block *sb,
1936 struct kernel_lb_addr *fileset)
1938 struct udf_sb_info *sbi = UDF_SB(sb);
1939 sector_t lastblock = sbi->s_last_block;
1942 ret = udf_scan_anchors(sb, &lastblock, fileset);
1946 /* No anchor found? Try VARCONV conversion of block numbers */
1947 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1948 lastblock = udf_variable_to_fixed(sbi->s_last_block);
1949 /* Firstly, we try to not convert number of the last block */
1950 ret = udf_scan_anchors(sb, &lastblock, fileset);
1954 lastblock = sbi->s_last_block;
1955 /* Secondly, we try with converted number of the last block */
1956 ret = udf_scan_anchors(sb, &lastblock, fileset);
1958 /* VARCONV didn't help. Clear it. */
1959 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1963 sbi->s_last_block = lastblock;
1968 * Check Volume Structure Descriptor, find Anchor block and load Volume
1969 * Descriptor Sequence.
1971 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1972 * block was not found.
1974 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1975 int silent, struct kernel_lb_addr *fileset)
1977 struct udf_sb_info *sbi = UDF_SB(sb);
1981 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1983 udf_warn(sb, "Bad block size\n");
1986 sbi->s_last_block = uopt->lastblock;
1988 /* Check that it is NSR02 compliant */
1989 nsr = udf_check_vsd(sb);
1992 udf_warn(sb, "No VRS found\n");
1996 udf_debug("Failed to read sector at offset %d. "
1997 "Assuming open disc. Skipping validity "
1998 "check\n", VSD_FIRST_SECTOR_OFFSET);
1999 if (!sbi->s_last_block)
2000 sbi->s_last_block = udf_get_last_block(sb);
2002 udf_debug("Validity check skipped because of novrs option\n");
2005 /* Look for anchor block and load Volume Descriptor Sequence */
2006 sbi->s_anchor = uopt->anchor;
2007 ret = udf_find_anchor(sb, fileset);
2009 if (!silent && ret == -EAGAIN)
2010 udf_warn(sb, "No anchor found\n");
2016 static void udf_finalize_lvid(struct logicalVolIntegrityDesc *lvid)
2018 struct timespec64 ts;
2020 ktime_get_real_ts64(&ts);
2021 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
2022 lvid->descTag.descCRC = cpu_to_le16(
2023 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
2024 le16_to_cpu(lvid->descTag.descCRCLength)));
2025 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
2028 static void udf_open_lvid(struct super_block *sb)
2030 struct udf_sb_info *sbi = UDF_SB(sb);
2031 struct buffer_head *bh = sbi->s_lvid_bh;
2032 struct logicalVolIntegrityDesc *lvid;
2033 struct logicalVolIntegrityDescImpUse *lvidiu;
2037 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2038 lvidiu = udf_sb_lvidiu(sb);
2042 mutex_lock(&sbi->s_alloc_mutex);
2043 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
2044 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
2045 if (le32_to_cpu(lvid->integrityType) == LVID_INTEGRITY_TYPE_CLOSE)
2046 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
2048 UDF_SET_FLAG(sb, UDF_FLAG_INCONSISTENT);
2050 udf_finalize_lvid(lvid);
2051 mark_buffer_dirty(bh);
2052 sbi->s_lvid_dirty = 0;
2053 mutex_unlock(&sbi->s_alloc_mutex);
2054 /* Make opening of filesystem visible on the media immediately */
2055 sync_dirty_buffer(bh);
2058 static void udf_close_lvid(struct super_block *sb)
2060 struct udf_sb_info *sbi = UDF_SB(sb);
2061 struct buffer_head *bh = sbi->s_lvid_bh;
2062 struct logicalVolIntegrityDesc *lvid;
2063 struct logicalVolIntegrityDescImpUse *lvidiu;
2067 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2068 lvidiu = udf_sb_lvidiu(sb);
2072 mutex_lock(&sbi->s_alloc_mutex);
2073 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
2074 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
2075 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
2076 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
2077 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
2078 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
2079 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
2080 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
2081 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_INCONSISTENT))
2082 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
2085 * We set buffer uptodate unconditionally here to avoid spurious
2086 * warnings from mark_buffer_dirty() when previous EIO has marked
2087 * the buffer as !uptodate
2089 set_buffer_uptodate(bh);
2090 udf_finalize_lvid(lvid);
2091 mark_buffer_dirty(bh);
2092 sbi->s_lvid_dirty = 0;
2093 mutex_unlock(&sbi->s_alloc_mutex);
2094 /* Make closing of filesystem visible on the media immediately */
2095 sync_dirty_buffer(bh);
2098 u64 lvid_get_unique_id(struct super_block *sb)
2100 struct buffer_head *bh;
2101 struct udf_sb_info *sbi = UDF_SB(sb);
2102 struct logicalVolIntegrityDesc *lvid;
2103 struct logicalVolHeaderDesc *lvhd;
2107 bh = sbi->s_lvid_bh;
2111 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2112 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2114 mutex_lock(&sbi->s_alloc_mutex);
2115 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2116 if (!(++uniqueID & 0xFFFFFFFF))
2118 lvhd->uniqueID = cpu_to_le64(uniqueID);
2119 udf_updated_lvid(sb);
2120 mutex_unlock(&sbi->s_alloc_mutex);
2125 static int udf_fill_super(struct super_block *sb, void *options, int silent)
2128 struct inode *inode = NULL;
2129 struct udf_options uopt;
2130 struct kernel_lb_addr rootdir, fileset;
2131 struct udf_sb_info *sbi;
2132 bool lvid_open = false;
2134 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
2135 /* By default we'll use overflow[ug]id when UDF inode [ug]id == -1 */
2136 uopt.uid = make_kuid(current_user_ns(), overflowuid);
2137 uopt.gid = make_kgid(current_user_ns(), overflowgid);
2139 uopt.fmode = UDF_INVALID_MODE;
2140 uopt.dmode = UDF_INVALID_MODE;
2141 uopt.nls_map = NULL;
2143 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
2147 sb->s_fs_info = sbi;
2149 mutex_init(&sbi->s_alloc_mutex);
2151 if (!udf_parse_options((char *)options, &uopt, false))
2152 goto parse_options_failure;
2154 fileset.logicalBlockNum = 0xFFFFFFFF;
2155 fileset.partitionReferenceNum = 0xFFFF;
2157 sbi->s_flags = uopt.flags;
2158 sbi->s_uid = uopt.uid;
2159 sbi->s_gid = uopt.gid;
2160 sbi->s_umask = uopt.umask;
2161 sbi->s_fmode = uopt.fmode;
2162 sbi->s_dmode = uopt.dmode;
2163 sbi->s_nls_map = uopt.nls_map;
2164 rwlock_init(&sbi->s_cred_lock);
2166 if (uopt.session == 0xFFFFFFFF)
2167 sbi->s_session = udf_get_last_session(sb);
2169 sbi->s_session = uopt.session;
2171 udf_debug("Multi-session=%d\n", sbi->s_session);
2173 /* Fill in the rest of the superblock */
2174 sb->s_op = &udf_sb_ops;
2175 sb->s_export_op = &udf_export_ops;
2177 sb->s_magic = UDF_SUPER_MAGIC;
2178 sb->s_time_gran = 1000;
2180 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
2181 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2183 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
2184 while (uopt.blocksize <= 4096) {
2185 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2187 if (!silent && ret != -EACCES) {
2188 pr_notice("Scanning with blocksize %u failed\n",
2191 brelse(sbi->s_lvid_bh);
2192 sbi->s_lvid_bh = NULL;
2194 * EACCES is special - we want to propagate to
2195 * upper layers that we cannot handle RW mount.
2202 uopt.blocksize <<= 1;
2206 if (ret == -EAGAIN) {
2207 udf_warn(sb, "No partition found (1)\n");
2213 udf_debug("Lastblock=%u\n", sbi->s_last_block);
2215 if (sbi->s_lvid_bh) {
2216 struct logicalVolIntegrityDescImpUse *lvidiu =
2218 uint16_t minUDFReadRev;
2219 uint16_t minUDFWriteRev;
2225 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2226 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
2227 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
2228 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
2230 UDF_MAX_READ_VERSION);
2233 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) {
2234 if (!sb_rdonly(sb)) {
2238 UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
2241 sbi->s_udfrev = minUDFWriteRev;
2243 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2244 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2245 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2246 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2249 if (!sbi->s_partitions) {
2250 udf_warn(sb, "No partition found (2)\n");
2255 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2256 UDF_PART_FLAG_READ_ONLY) {
2257 if (!sb_rdonly(sb)) {
2261 UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
2264 ret = udf_find_fileset(sb, &fileset, &rootdir);
2266 udf_warn(sb, "No fileset found\n");
2271 struct timestamp ts;
2272 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2273 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2274 sbi->s_volume_ident,
2275 le16_to_cpu(ts.year), ts.month, ts.day,
2276 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2278 if (!sb_rdonly(sb)) {
2283 /* Assign the root inode */
2284 /* assign inodes by physical block number */
2285 /* perhaps it's not extensible enough, but for now ... */
2286 inode = udf_iget(sb, &rootdir);
2287 if (IS_ERR(inode)) {
2288 udf_err(sb, "Error in udf_iget, block=%u, partition=%u\n",
2289 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2290 ret = PTR_ERR(inode);
2294 /* Allocate a dentry for the root inode */
2295 sb->s_root = d_make_root(inode);
2297 udf_err(sb, "Couldn't allocate root dentry\n");
2301 sb->s_maxbytes = MAX_LFS_FILESIZE;
2302 sb->s_max_links = UDF_MAX_LINKS;
2306 iput(sbi->s_vat_inode);
2307 parse_options_failure:
2308 unload_nls(uopt.nls_map);
2311 brelse(sbi->s_lvid_bh);
2312 udf_sb_free_partitions(sb);
2314 sb->s_fs_info = NULL;
2319 void _udf_err(struct super_block *sb, const char *function,
2320 const char *fmt, ...)
2322 struct va_format vaf;
2325 va_start(args, fmt);
2330 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2335 void _udf_warn(struct super_block *sb, const char *function,
2336 const char *fmt, ...)
2338 struct va_format vaf;
2341 va_start(args, fmt);
2346 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2351 static void udf_put_super(struct super_block *sb)
2353 struct udf_sb_info *sbi;
2357 iput(sbi->s_vat_inode);
2358 unload_nls(sbi->s_nls_map);
2361 brelse(sbi->s_lvid_bh);
2362 udf_sb_free_partitions(sb);
2363 mutex_destroy(&sbi->s_alloc_mutex);
2364 kfree(sb->s_fs_info);
2365 sb->s_fs_info = NULL;
2368 static int udf_sync_fs(struct super_block *sb, int wait)
2370 struct udf_sb_info *sbi = UDF_SB(sb);
2372 mutex_lock(&sbi->s_alloc_mutex);
2373 if (sbi->s_lvid_dirty) {
2374 struct buffer_head *bh = sbi->s_lvid_bh;
2375 struct logicalVolIntegrityDesc *lvid;
2377 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2378 udf_finalize_lvid(lvid);
2381 * Blockdevice will be synced later so we don't have to submit
2384 mark_buffer_dirty(bh);
2385 sbi->s_lvid_dirty = 0;
2387 mutex_unlock(&sbi->s_alloc_mutex);
2392 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2394 struct super_block *sb = dentry->d_sb;
2395 struct udf_sb_info *sbi = UDF_SB(sb);
2396 struct logicalVolIntegrityDescImpUse *lvidiu;
2397 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2399 lvidiu = udf_sb_lvidiu(sb);
2400 buf->f_type = UDF_SUPER_MAGIC;
2401 buf->f_bsize = sb->s_blocksize;
2402 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2403 buf->f_bfree = udf_count_free(sb);
2404 buf->f_bavail = buf->f_bfree;
2406 * Let's pretend each free block is also a free 'inode' since UDF does
2407 * not have separate preallocated table of inodes.
2409 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2410 le32_to_cpu(lvidiu->numDirs)) : 0)
2412 buf->f_ffree = buf->f_bfree;
2413 buf->f_namelen = UDF_NAME_LEN;
2414 buf->f_fsid = u64_to_fsid(id);
2419 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2420 struct udf_bitmap *bitmap)
2422 struct buffer_head *bh = NULL;
2423 unsigned int accum = 0;
2425 udf_pblk_t block = 0, newblock;
2426 struct kernel_lb_addr loc;
2430 struct spaceBitmapDesc *bm;
2432 loc.logicalBlockNum = bitmap->s_extPosition;
2433 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2434 bh = udf_read_ptagged(sb, &loc, 0, &ident);
2437 udf_err(sb, "udf_count_free failed\n");
2439 } else if (ident != TAG_IDENT_SBD) {
2441 udf_err(sb, "udf_count_free failed\n");
2445 bm = (struct spaceBitmapDesc *)bh->b_data;
2446 bytes = le32_to_cpu(bm->numOfBytes);
2447 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2448 ptr = (uint8_t *)bh->b_data;
2451 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2452 accum += bitmap_weight((const unsigned long *)(ptr + index),
2457 newblock = udf_get_lb_pblock(sb, &loc, ++block);
2458 bh = udf_tread(sb, newblock);
2460 udf_debug("read failed\n");
2464 ptr = (uint8_t *)bh->b_data;
2472 static unsigned int udf_count_free_table(struct super_block *sb,
2473 struct inode *table)
2475 unsigned int accum = 0;
2477 struct kernel_lb_addr eloc;
2479 struct extent_position epos;
2481 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
2482 epos.block = UDF_I(table)->i_location;
2483 epos.offset = sizeof(struct unallocSpaceEntry);
2486 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2487 accum += (elen >> table->i_sb->s_blocksize_bits);
2490 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
2495 static unsigned int udf_count_free(struct super_block *sb)
2497 unsigned int accum = 0;
2498 struct udf_sb_info *sbi = UDF_SB(sb);
2499 struct udf_part_map *map;
2500 unsigned int part = sbi->s_partition;
2501 int ptype = sbi->s_partmaps[part].s_partition_type;
2503 if (ptype == UDF_METADATA_MAP25) {
2504 part = sbi->s_partmaps[part].s_type_specific.s_metadata.
2505 s_phys_partition_ref;
2506 } else if (ptype == UDF_VIRTUAL_MAP15 || ptype == UDF_VIRTUAL_MAP20) {
2508 * Filesystems with VAT are append-only and we cannot write to
2509 * them. Let's just report 0 here.
2514 if (sbi->s_lvid_bh) {
2515 struct logicalVolIntegrityDesc *lvid =
2516 (struct logicalVolIntegrityDesc *)
2517 sbi->s_lvid_bh->b_data;
2518 if (le32_to_cpu(lvid->numOfPartitions) > part) {
2519 accum = le32_to_cpu(
2520 lvid->freeSpaceTable[part]);
2521 if (accum == 0xFFFFFFFF)
2529 map = &sbi->s_partmaps[part];
2530 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2531 accum += udf_count_free_bitmap(sb,
2532 map->s_uspace.s_bitmap);
2537 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2538 accum += udf_count_free_table(sb,
2539 map->s_uspace.s_table);
2544 MODULE_AUTHOR("Ben Fennema");
2545 MODULE_DESCRIPTION("Universal Disk Format Filesystem");
2546 MODULE_LICENSE("GPL");
2547 module_init(init_udf_fs)
2548 module_exit(exit_udf_fs)