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/smp_lock.h>
52 #include <linux/buffer_head.h>
53 #include <linux/vfs.h>
54 #include <linux/vmalloc.h>
55 #include <linux/errno.h>
56 #include <linux/mount.h>
57 #include <linux/seq_file.h>
58 #include <linux/bitmap.h>
59 #include <asm/byteorder.h>
64 #include <linux/init.h>
65 #include <asm/uaccess.h>
67 #define VDS_POS_PRIMARY_VOL_DESC 0
68 #define VDS_POS_UNALLOC_SPACE_DESC 1
69 #define VDS_POS_LOGICAL_VOL_DESC 2
70 #define VDS_POS_PARTITION_DESC 3
71 #define VDS_POS_IMP_USE_VOL_DESC 4
72 #define VDS_POS_VOL_DESC_PTR 5
73 #define VDS_POS_TERMINATING_DESC 6
74 #define VDS_POS_LENGTH 7
76 #define UDF_DEFAULT_BLOCKSIZE 2048
78 static char error_buf[1024];
80 /* These are the "meat" - everything else is stuffing */
81 static int udf_fill_super(struct super_block *, void *, int);
82 static void udf_put_super(struct super_block *);
83 static void udf_write_super(struct super_block *);
84 static int udf_remount_fs(struct super_block *, int *, char *);
85 static int udf_check_valid(struct super_block *, int, int);
86 static int udf_vrs(struct super_block *sb, int silent);
87 static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad);
88 static void udf_find_anchor(struct super_block *);
89 static int udf_find_fileset(struct super_block *, kernel_lb_addr *,
91 static void udf_load_fileset(struct super_block *, struct buffer_head *,
93 static void udf_open_lvid(struct super_block *);
94 static void udf_close_lvid(struct super_block *);
95 static unsigned int udf_count_free(struct super_block *);
96 static int udf_statfs(struct dentry *, struct kstatfs *);
97 static int udf_show_options(struct seq_file *, struct vfsmount *);
98 static void udf_error(struct super_block *sb, const char *function,
99 const char *fmt, ...);
101 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
103 struct logicalVolIntegrityDesc *lvid =
104 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
105 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
106 __u32 offset = number_of_partitions * 2 *
107 sizeof(uint32_t)/sizeof(uint8_t);
108 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
111 /* UDF filesystem type */
112 static int udf_get_sb(struct file_system_type *fs_type,
113 int flags, const char *dev_name, void *data,
114 struct vfsmount *mnt)
116 return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt);
119 static struct file_system_type udf_fstype = {
120 .owner = THIS_MODULE,
122 .get_sb = udf_get_sb,
123 .kill_sb = kill_block_super,
124 .fs_flags = FS_REQUIRES_DEV,
127 static struct kmem_cache *udf_inode_cachep;
129 static struct inode *udf_alloc_inode(struct super_block *sb)
131 struct udf_inode_info *ei;
132 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
137 ei->i_lenExtents = 0;
138 ei->i_next_alloc_block = 0;
139 ei->i_next_alloc_goal = 0;
142 return &ei->vfs_inode;
145 static void udf_destroy_inode(struct inode *inode)
147 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
150 static void init_once(struct kmem_cache *cachep, void *foo)
152 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
154 ei->i_ext.i_data = NULL;
155 inode_init_once(&ei->vfs_inode);
158 static int init_inodecache(void)
160 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
161 sizeof(struct udf_inode_info),
162 0, (SLAB_RECLAIM_ACCOUNT |
165 if (!udf_inode_cachep)
170 static void destroy_inodecache(void)
172 kmem_cache_destroy(udf_inode_cachep);
175 /* Superblock operations */
176 static const struct super_operations udf_sb_ops = {
177 .alloc_inode = udf_alloc_inode,
178 .destroy_inode = udf_destroy_inode,
179 .write_inode = udf_write_inode,
180 .delete_inode = udf_delete_inode,
181 .clear_inode = udf_clear_inode,
182 .put_super = udf_put_super,
183 .write_super = udf_write_super,
184 .statfs = udf_statfs,
185 .remount_fs = udf_remount_fs,
186 .show_options = udf_show_options,
191 unsigned int blocksize;
192 unsigned int session;
193 unsigned int lastblock;
196 unsigned short partition;
197 unsigned int fileset;
198 unsigned int rootdir;
203 struct nls_table *nls_map;
206 static int __init init_udf_fs(void)
210 err = init_inodecache();
213 err = register_filesystem(&udf_fstype);
220 destroy_inodecache();
226 static void __exit exit_udf_fs(void)
228 unregister_filesystem(&udf_fstype);
229 destroy_inodecache();
232 module_init(init_udf_fs)
233 module_exit(exit_udf_fs)
235 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
237 struct udf_sb_info *sbi = UDF_SB(sb);
239 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
241 if (!sbi->s_partmaps) {
242 udf_error(sb, __FUNCTION__,
243 "Unable to allocate space for %d partition maps",
245 sbi->s_partitions = 0;
249 sbi->s_partitions = count;
253 static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
255 struct super_block *sb = mnt->mnt_sb;
256 struct udf_sb_info *sbi = UDF_SB(sb);
258 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
259 seq_puts(seq, ",nostrict");
260 if (sb->s_blocksize != UDF_DEFAULT_BLOCKSIZE)
261 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
262 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
263 seq_puts(seq, ",unhide");
264 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
265 seq_puts(seq, ",undelete");
266 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
267 seq_puts(seq, ",noadinicb");
268 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
269 seq_puts(seq, ",shortad");
270 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
271 seq_puts(seq, ",uid=forget");
272 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
273 seq_puts(seq, ",uid=ignore");
274 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
275 seq_puts(seq, ",gid=forget");
276 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
277 seq_puts(seq, ",gid=ignore");
278 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
279 seq_printf(seq, ",uid=%u", sbi->s_uid);
280 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
281 seq_printf(seq, ",gid=%u", sbi->s_gid);
282 if (sbi->s_umask != 0)
283 seq_printf(seq, ",umask=%o", sbi->s_umask);
284 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
285 seq_printf(seq, ",session=%u", sbi->s_session);
286 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
287 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
289 * s_anchor[2] could be zeroed out in case there is no anchor
290 * in the specified block, but then the "anchor=N" option
291 * originally given by the user wasn't effective, so it's OK
292 * if we don't show it.
294 if (sbi->s_anchor[2] != 0)
295 seq_printf(seq, ",anchor=%u", sbi->s_anchor[2]);
297 * volume, partition, fileset and rootdir seem to be ignored
300 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
301 seq_puts(seq, ",utf8");
302 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
303 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
312 * Parse mount options.
315 * The following mount options are supported:
317 * gid= Set the default group.
318 * umask= Set the default umask.
319 * uid= Set the default user.
320 * bs= Set the block size.
321 * unhide Show otherwise hidden files.
322 * undelete Show deleted files in lists.
323 * adinicb Embed data in the inode (default)
324 * noadinicb Don't embed data in the inode
325 * shortad Use short ad's
326 * longad Use long ad's (default)
327 * nostrict Unset strict conformance
328 * iocharset= Set the NLS character set
330 * The remaining are for debugging and disaster recovery:
332 * novrs Skip volume sequence recognition
334 * The following expect a offset from 0.
336 * session= Set the CDROM session (default= last session)
337 * anchor= Override standard anchor location. (default= 256)
338 * volume= Override the VolumeDesc location. (unused)
339 * partition= Override the PartitionDesc location. (unused)
340 * lastblock= Set the last block of the filesystem/
342 * The following expect a offset from the partition root.
344 * fileset= Override the fileset block location. (unused)
345 * rootdir= Override the root directory location. (unused)
346 * WARNING: overriding the rootdir to a non-directory may
347 * yield highly unpredictable results.
350 * options Pointer to mount options string.
351 * uopts Pointer to mount options variable.
354 * <return> 1 Mount options parsed okay.
355 * <return> 0 Error parsing mount options.
358 * July 1, 1997 - Andrew E. Mileski
359 * Written, tested, and released.
363 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
364 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
365 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
366 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
367 Opt_rootdir, Opt_utf8, Opt_iocharset,
368 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore
371 static match_table_t tokens = {
372 {Opt_novrs, "novrs"},
373 {Opt_nostrict, "nostrict"},
375 {Opt_unhide, "unhide"},
376 {Opt_undelete, "undelete"},
377 {Opt_noadinicb, "noadinicb"},
378 {Opt_adinicb, "adinicb"},
379 {Opt_shortad, "shortad"},
380 {Opt_longad, "longad"},
381 {Opt_uforget, "uid=forget"},
382 {Opt_uignore, "uid=ignore"},
383 {Opt_gforget, "gid=forget"},
384 {Opt_gignore, "gid=ignore"},
387 {Opt_umask, "umask=%o"},
388 {Opt_session, "session=%u"},
389 {Opt_lastblock, "lastblock=%u"},
390 {Opt_anchor, "anchor=%u"},
391 {Opt_volume, "volume=%u"},
392 {Opt_partition, "partition=%u"},
393 {Opt_fileset, "fileset=%u"},
394 {Opt_rootdir, "rootdir=%u"},
396 {Opt_iocharset, "iocharset=%s"},
400 static int udf_parse_options(char *options, struct udf_options *uopt,
407 uopt->blocksize = UDF_DEFAULT_BLOCKSIZE;
408 uopt->partition = 0xFFFF;
409 uopt->session = 0xFFFFFFFF;
412 uopt->volume = 0xFFFFFFFF;
413 uopt->rootdir = 0xFFFFFFFF;
414 uopt->fileset = 0xFFFFFFFF;
415 uopt->nls_map = NULL;
420 while ((p = strsep(&options, ",")) != NULL) {
421 substring_t args[MAX_OPT_ARGS];
426 token = match_token(p, tokens, args);
431 if (match_int(&args[0], &option))
433 uopt->blocksize = option;
436 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
439 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
442 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
445 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
448 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
451 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
454 if (match_int(args, &option))
457 uopt->flags |= (1 << UDF_FLAG_GID_SET);
460 if (match_int(args, &option))
463 uopt->flags |= (1 << UDF_FLAG_UID_SET);
466 if (match_octal(args, &option))
468 uopt->umask = option;
471 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
474 if (match_int(args, &option))
476 uopt->session = option;
478 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
481 if (match_int(args, &option))
483 uopt->lastblock = option;
485 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
488 if (match_int(args, &option))
490 uopt->anchor = option;
493 if (match_int(args, &option))
495 uopt->volume = option;
498 if (match_int(args, &option))
500 uopt->partition = option;
503 if (match_int(args, &option))
505 uopt->fileset = option;
508 if (match_int(args, &option))
510 uopt->rootdir = option;
513 uopt->flags |= (1 << UDF_FLAG_UTF8);
515 #ifdef CONFIG_UDF_NLS
517 uopt->nls_map = load_nls(args[0].from);
518 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
522 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
525 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
528 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
531 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
534 printk(KERN_ERR "udf: bad mount option \"%s\" "
535 "or missing value\n", p);
542 static void udf_write_super(struct super_block *sb)
546 if (!(sb->s_flags & MS_RDONLY))
553 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
555 struct udf_options uopt;
556 struct udf_sb_info *sbi = UDF_SB(sb);
558 uopt.flags = sbi->s_flags;
559 uopt.uid = sbi->s_uid;
560 uopt.gid = sbi->s_gid;
561 uopt.umask = sbi->s_umask;
563 if (!udf_parse_options(options, &uopt, true))
566 sbi->s_flags = uopt.flags;
567 sbi->s_uid = uopt.uid;
568 sbi->s_gid = uopt.gid;
569 sbi->s_umask = uopt.umask;
571 if (sbi->s_lvid_bh) {
572 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
573 if (write_rev > UDF_MAX_WRITE_VERSION)
577 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
579 if (*flags & MS_RDONLY)
587 static int udf_vrs(struct super_block *sb, int silent)
589 struct volStructDesc *vsd = NULL;
590 loff_t sector = 32768;
592 struct buffer_head *bh = NULL;
596 struct udf_sb_info *sbi;
598 /* Block size must be a multiple of 512 */
599 if (sb->s_blocksize & 511)
603 if (sb->s_blocksize < sizeof(struct volStructDesc))
604 sectorsize = sizeof(struct volStructDesc);
606 sectorsize = sb->s_blocksize;
608 sector += (sbi->s_session << sb->s_blocksize_bits);
610 udf_debug("Starting at sector %u (%ld byte sectors)\n",
611 (sector >> sb->s_blocksize_bits), sb->s_blocksize);
612 /* Process the sequence (if applicable) */
613 for (; !nsr02 && !nsr03; sector += sectorsize) {
615 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
619 /* Look for ISO descriptors */
620 vsd = (struct volStructDesc *)(bh->b_data +
621 (sector & (sb->s_blocksize - 1)));
623 if (vsd->stdIdent[0] == 0) {
626 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
629 switch (vsd->structType) {
631 udf_debug("ISO9660 Boot Record found\n");
634 udf_debug("ISO9660 Primary Volume Descriptor "
638 udf_debug("ISO9660 Supplementary Volume "
639 "Descriptor found\n");
642 udf_debug("ISO9660 Volume Partition Descriptor "
646 udf_debug("ISO9660 Volume Descriptor Set "
647 "Terminator found\n");
650 udf_debug("ISO9660 VRS (%u) found\n",
654 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
657 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
661 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
664 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
674 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
681 * Check whether there is an anchor block in the given block
683 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
686 struct buffer_head *bh = NULL;
692 if (udf_fixed_to_variable(block) >=
693 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
695 bh = sb_bread(sb, udf_fixed_to_variable(block));
698 bh = sb_bread(sb, block);
703 t = (tag *)bh->b_data;
704 ident = le16_to_cpu(t->tagIdent);
705 location = le32_to_cpu(t->tagLocation);
707 if (ident != TAG_IDENT_AVDP)
709 return location == block;
712 /* Search for an anchor volume descriptor pointer */
713 static sector_t udf_scan_anchors(struct super_block *sb, bool varconv,
718 struct udf_sb_info *sbi = UDF_SB(sb);
721 last[1] = last[0] - 1;
722 last[2] = last[0] + 1;
723 last[3] = last[0] - 2;
724 last[4] = last[0] - 150;
725 last[5] = last[0] - 152;
727 /* according to spec, anchor is in either:
731 * however, if the disc isn't closed, it could be 512 */
733 for (i = 0; i < ARRAY_SIZE(last); i++) {
736 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
737 sb->s_blocksize_bits)
740 if (udf_check_anchor_block(sb, last[i], varconv)) {
741 sbi->s_anchor[0] = last[i];
742 sbi->s_anchor[1] = last[i] - 256;
749 if (udf_check_anchor_block(sb, last[i] - 256, varconv)) {
750 sbi->s_anchor[1] = last[i] - 256;
755 if (udf_check_anchor_block(sb, sbi->s_session + 256, varconv)) {
756 sbi->s_anchor[0] = sbi->s_session + 256;
759 if (udf_check_anchor_block(sb, sbi->s_session + 512, varconv)) {
760 sbi->s_anchor[0] = sbi->s_session + 512;
767 * Find an anchor volume descriptor. The function expects sbi->s_lastblock to
768 * be the last block on the media.
770 * Return 1 if not found, 0 if ok
773 static void udf_find_anchor(struct super_block *sb)
776 struct buffer_head *bh = NULL;
779 struct udf_sb_info *sbi = UDF_SB(sb);
781 lastblock = udf_scan_anchors(sb, 0, sbi->s_last_block);
785 /* No anchor found? Try VARCONV conversion of block numbers */
786 /* Firstly, we try to not convert number of the last block */
787 lastblock = udf_scan_anchors(sb, 1,
788 udf_variable_to_fixed(sbi->s_last_block));
790 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
794 /* Secondly, we try with converted number of the last block */
795 lastblock = udf_scan_anchors(sb, 1, sbi->s_last_block);
797 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
801 * Check located anchors and the anchor block supplied via
804 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
805 if (!sbi->s_anchor[i])
807 bh = udf_read_tagged(sb, sbi->s_anchor[i],
808 sbi->s_anchor[i], &ident);
810 sbi->s_anchor[i] = 0;
813 if (ident != TAG_IDENT_AVDP)
814 sbi->s_anchor[i] = 0;
818 sbi->s_last_block = lastblock;
821 static int udf_find_fileset(struct super_block *sb,
822 kernel_lb_addr *fileset,
823 kernel_lb_addr *root)
825 struct buffer_head *bh = NULL;
828 struct udf_sb_info *sbi;
830 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
831 fileset->partitionReferenceNum != 0xFFFF) {
832 bh = udf_read_ptagged(sb, *fileset, 0, &ident);
836 } else if (ident != TAG_IDENT_FSD) {
845 /* Search backwards through the partitions */
846 kernel_lb_addr newfileset;
848 /* --> cvg: FIXME - is it reasonable? */
851 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
852 (newfileset.partitionReferenceNum != 0xFFFF &&
853 fileset->logicalBlockNum == 0xFFFFFFFF &&
854 fileset->partitionReferenceNum == 0xFFFF);
855 newfileset.partitionReferenceNum--) {
856 lastblock = sbi->s_partmaps
857 [newfileset.partitionReferenceNum]
859 newfileset.logicalBlockNum = 0;
862 bh = udf_read_ptagged(sb, newfileset, 0,
865 newfileset.logicalBlockNum++;
872 struct spaceBitmapDesc *sp;
873 sp = (struct spaceBitmapDesc *)
875 newfileset.logicalBlockNum += 1 +
876 ((le32_to_cpu(sp->numOfBytes) +
877 sizeof(struct spaceBitmapDesc)
878 - 1) >> sb->s_blocksize_bits);
883 *fileset = newfileset;
886 newfileset.logicalBlockNum++;
891 } while (newfileset.logicalBlockNum < lastblock &&
892 fileset->logicalBlockNum == 0xFFFFFFFF &&
893 fileset->partitionReferenceNum == 0xFFFF);
897 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
898 fileset->partitionReferenceNum != 0xFFFF) && bh) {
899 udf_debug("Fileset at block=%d, partition=%d\n",
900 fileset->logicalBlockNum,
901 fileset->partitionReferenceNum);
903 sbi->s_partition = fileset->partitionReferenceNum;
904 udf_load_fileset(sb, bh, root);
911 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
913 struct primaryVolDesc *pvoldesc;
916 struct buffer_head *bh;
919 bh = udf_read_tagged(sb, block, block, &ident);
922 BUG_ON(ident != TAG_IDENT_PVD);
924 pvoldesc = (struct primaryVolDesc *)bh->b_data;
926 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
927 pvoldesc->recordingDateAndTime)) {
929 timestamp *ts = &pvoldesc->recordingDateAndTime;
930 udf_debug("recording time %04u/%02u/%02u"
932 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
933 ts->minute, le16_to_cpu(ts->typeAndTimezone));
937 if (!udf_build_ustr(&instr, pvoldesc->volIdent, 32))
938 if (udf_CS0toUTF8(&outstr, &instr)) {
939 strncpy(UDF_SB(sb)->s_volume_ident, outstr.u_name,
940 outstr.u_len > 31 ? 31 : outstr.u_len);
941 udf_debug("volIdent[] = '%s'\n",
942 UDF_SB(sb)->s_volume_ident);
945 if (!udf_build_ustr(&instr, pvoldesc->volSetIdent, 128))
946 if (udf_CS0toUTF8(&outstr, &instr))
947 udf_debug("volSetIdent[] = '%s'\n", outstr.u_name);
953 static int udf_load_metadata_files(struct super_block *sb, int partition)
955 struct udf_sb_info *sbi = UDF_SB(sb);
956 struct udf_part_map *map;
957 struct udf_meta_data *mdata;
961 map = &sbi->s_partmaps[partition];
962 mdata = &map->s_type_specific.s_metadata;
964 /* metadata address */
965 addr.logicalBlockNum = mdata->s_meta_file_loc;
966 addr.partitionReferenceNum = map->s_partition_num;
968 udf_debug("Metadata file location: block = %d part = %d\n",
969 addr.logicalBlockNum, addr.partitionReferenceNum);
971 mdata->s_metadata_fe = udf_iget(sb, addr);
973 if (mdata->s_metadata_fe == NULL) {
974 udf_warning(sb, __func__, "metadata inode efe not found, "
975 "will try mirror inode.");
977 } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type !=
978 ICBTAG_FLAG_AD_SHORT) {
979 udf_warning(sb, __func__, "metadata inode efe does not have "
980 "short allocation descriptors!");
982 iput(mdata->s_metadata_fe);
983 mdata->s_metadata_fe = NULL;
986 /* mirror file entry */
987 addr.logicalBlockNum = mdata->s_mirror_file_loc;
988 addr.partitionReferenceNum = map->s_partition_num;
990 udf_debug("Mirror metadata file location: block = %d part = %d\n",
991 addr.logicalBlockNum, addr.partitionReferenceNum);
993 mdata->s_mirror_fe = udf_iget(sb, addr);
995 if (mdata->s_mirror_fe == NULL) {
997 udf_error(sb, __func__, "mirror inode efe not found "
998 "and metadata inode is missing too, exiting...");
1001 udf_warning(sb, __func__, "mirror inode efe not found,"
1002 " but metadata inode is OK");
1003 } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type !=
1004 ICBTAG_FLAG_AD_SHORT) {
1005 udf_warning(sb, __func__, "mirror inode efe does not have "
1006 "short allocation descriptors!");
1007 iput(mdata->s_mirror_fe);
1008 mdata->s_mirror_fe = NULL;
1016 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1018 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
1019 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
1020 addr.partitionReferenceNum = map->s_partition_num;
1022 udf_debug("Bitmap file location: block = %d part = %d\n",
1023 addr.logicalBlockNum, addr.partitionReferenceNum);
1025 mdata->s_bitmap_fe = udf_iget(sb, addr);
1027 if (mdata->s_bitmap_fe == NULL) {
1028 if (sb->s_flags & MS_RDONLY)
1029 udf_warning(sb, __func__, "bitmap inode efe "
1030 "not found but it's ok since the disc"
1031 " is mounted read-only");
1033 udf_error(sb, __func__, "bitmap inode efe not "
1034 "found and attempted read-write mount");
1040 udf_debug("udf_load_metadata_files Ok\n");
1048 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
1049 kernel_lb_addr *root)
1051 struct fileSetDesc *fset;
1053 fset = (struct fileSetDesc *)bh->b_data;
1055 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1057 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1059 udf_debug("Rootdir at block=%d, partition=%d\n",
1060 root->logicalBlockNum, root->partitionReferenceNum);
1063 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1065 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
1066 return DIV_ROUND_UP(map->s_partition_len +
1067 (sizeof(struct spaceBitmapDesc) << 3),
1068 sb->s_blocksize * 8);
1071 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1073 struct udf_bitmap *bitmap;
1077 nr_groups = udf_compute_nr_groups(sb, index);
1078 size = sizeof(struct udf_bitmap) +
1079 (sizeof(struct buffer_head *) * nr_groups);
1081 if (size <= PAGE_SIZE)
1082 bitmap = kmalloc(size, GFP_KERNEL);
1084 bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
1086 if (bitmap == NULL) {
1087 udf_error(sb, __FUNCTION__,
1088 "Unable to allocate space for bitmap "
1089 "and %d buffer_head pointers", nr_groups);
1093 memset(bitmap, 0x00, size);
1094 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
1095 bitmap->s_nr_groups = nr_groups;
1099 static int udf_fill_partdesc_info(struct super_block *sb,
1100 struct partitionDesc *p, int p_index)
1102 struct udf_part_map *map;
1103 struct udf_sb_info *sbi = UDF_SB(sb);
1104 struct partitionHeaderDesc *phd;
1106 map = &sbi->s_partmaps[p_index];
1108 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1109 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1111 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1112 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1113 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1114 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1115 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1116 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1117 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1118 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1120 udf_debug("Partition (%d:%d type %x) starts at physical %d, "
1121 "block length %d\n", partitionNumber, p_index,
1122 map->s_partition_type, map->s_partition_root,
1123 map->s_partition_len);
1125 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1126 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1129 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1130 if (phd->unallocSpaceTable.extLength) {
1131 kernel_lb_addr loc = {
1132 .logicalBlockNum = le32_to_cpu(
1133 phd->unallocSpaceTable.extPosition),
1134 .partitionReferenceNum = p_index,
1137 map->s_uspace.s_table = udf_iget(sb, loc);
1138 if (!map->s_uspace.s_table) {
1139 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1143 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1144 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1145 p_index, map->s_uspace.s_table->i_ino);
1148 if (phd->unallocSpaceBitmap.extLength) {
1149 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1152 map->s_uspace.s_bitmap = bitmap;
1153 bitmap->s_extLength = le32_to_cpu(
1154 phd->unallocSpaceBitmap.extLength);
1155 bitmap->s_extPosition = le32_to_cpu(
1156 phd->unallocSpaceBitmap.extPosition);
1157 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1158 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
1159 bitmap->s_extPosition);
1162 if (phd->partitionIntegrityTable.extLength)
1163 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1165 if (phd->freedSpaceTable.extLength) {
1166 kernel_lb_addr loc = {
1167 .logicalBlockNum = le32_to_cpu(
1168 phd->freedSpaceTable.extPosition),
1169 .partitionReferenceNum = p_index,
1172 map->s_fspace.s_table = udf_iget(sb, loc);
1173 if (!map->s_fspace.s_table) {
1174 udf_debug("cannot load freedSpaceTable (part %d)\n",
1179 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1180 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1181 p_index, map->s_fspace.s_table->i_ino);
1184 if (phd->freedSpaceBitmap.extLength) {
1185 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1188 map->s_fspace.s_bitmap = bitmap;
1189 bitmap->s_extLength = le32_to_cpu(
1190 phd->freedSpaceBitmap.extLength);
1191 bitmap->s_extPosition = le32_to_cpu(
1192 phd->freedSpaceBitmap.extPosition);
1193 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1194 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
1195 bitmap->s_extPosition);
1200 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1202 struct udf_sb_info *sbi = UDF_SB(sb);
1203 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1205 struct buffer_head *bh = NULL;
1206 struct udf_inode_info *vati;
1208 struct virtualAllocationTable20 *vat20;
1210 /* VAT file entry is in the last recorded block */
1211 ino.partitionReferenceNum = type1_index;
1212 ino.logicalBlockNum = sbi->s_last_block - map->s_partition_root;
1213 sbi->s_vat_inode = udf_iget(sb, ino);
1214 if (!sbi->s_vat_inode)
1217 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1218 map->s_type_specific.s_virtual.s_start_offset = 0;
1219 map->s_type_specific.s_virtual.s_num_entries =
1220 (sbi->s_vat_inode->i_size - 36) >> 2;
1221 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1222 vati = UDF_I(sbi->s_vat_inode);
1223 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1224 pos = udf_block_map(sbi->s_vat_inode, 0);
1225 bh = sb_bread(sb, pos);
1228 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1230 vat20 = (struct virtualAllocationTable20 *)
1234 map->s_type_specific.s_virtual.s_start_offset =
1235 le16_to_cpu(vat20->lengthHeader);
1236 map->s_type_specific.s_virtual.s_num_entries =
1237 (sbi->s_vat_inode->i_size -
1238 map->s_type_specific.s_virtual.
1239 s_start_offset) >> 2;
1245 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1247 struct buffer_head *bh;
1248 struct partitionDesc *p;
1249 struct udf_part_map *map;
1250 struct udf_sb_info *sbi = UDF_SB(sb);
1252 uint16_t partitionNumber;
1256 bh = udf_read_tagged(sb, block, block, &ident);
1259 if (ident != TAG_IDENT_PD)
1262 p = (struct partitionDesc *)bh->b_data;
1263 partitionNumber = le16_to_cpu(p->partitionNumber);
1265 /* First scan for TYPE1, SPARABLE and METADATA partitions */
1266 for (i = 0; i < sbi->s_partitions; i++) {
1267 map = &sbi->s_partmaps[i];
1268 udf_debug("Searching map: (%d == %d)\n",
1269 map->s_partition_num, partitionNumber);
1270 if (map->s_partition_num == partitionNumber &&
1271 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1272 map->s_partition_type == UDF_SPARABLE_MAP15))
1276 if (i >= sbi->s_partitions) {
1277 udf_debug("Partition (%d) not found in partition map\n",
1282 ret = udf_fill_partdesc_info(sb, p, i);
1285 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1286 * PHYSICAL partitions are already set up
1289 for (i = 0; i < sbi->s_partitions; i++) {
1290 map = &sbi->s_partmaps[i];
1292 if (map->s_partition_num == partitionNumber &&
1293 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1294 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1295 map->s_partition_type == UDF_METADATA_MAP25))
1299 if (i >= sbi->s_partitions)
1302 ret = udf_fill_partdesc_info(sb, p, i);
1306 if (map->s_partition_type == UDF_METADATA_MAP25) {
1307 ret = udf_load_metadata_files(sb, i);
1309 printk(KERN_ERR "UDF-fs: error loading MetaData "
1310 "partition map %d\n", i);
1314 ret = udf_load_vat(sb, i, type1_idx);
1318 * Mark filesystem read-only if we have a partition with
1319 * virtual map since we don't handle writing to it (we
1320 * overwrite blocks instead of relocating them).
1322 sb->s_flags |= MS_RDONLY;
1323 printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only "
1324 "because writing to pseudooverwrite partition is "
1325 "not implemented.\n");
1328 /* In case loading failed, we handle cleanup in udf_fill_super */
1333 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1334 kernel_lb_addr *fileset)
1336 struct logicalVolDesc *lvd;
1339 struct udf_sb_info *sbi = UDF_SB(sb);
1340 struct genericPartitionMap *gpm;
1342 struct buffer_head *bh;
1345 bh = udf_read_tagged(sb, block, block, &ident);
1348 BUG_ON(ident != TAG_IDENT_LVD);
1349 lvd = (struct logicalVolDesc *)bh->b_data;
1351 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1357 for (i = 0, offset = 0;
1358 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
1359 i++, offset += gpm->partitionMapLength) {
1360 struct udf_part_map *map = &sbi->s_partmaps[i];
1361 gpm = (struct genericPartitionMap *)
1362 &(lvd->partitionMaps[offset]);
1363 type = gpm->partitionMapType;
1365 struct genericPartitionMap1 *gpm1 =
1366 (struct genericPartitionMap1 *)gpm;
1367 map->s_partition_type = UDF_TYPE1_MAP15;
1368 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1369 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1370 map->s_partition_func = NULL;
1371 } else if (type == 2) {
1372 struct udfPartitionMap2 *upm2 =
1373 (struct udfPartitionMap2 *)gpm;
1374 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1375 strlen(UDF_ID_VIRTUAL))) {
1377 le16_to_cpu(((__le16 *)upm2->partIdent.
1380 map->s_partition_type =
1382 map->s_partition_func =
1383 udf_get_pblock_virt15;
1385 map->s_partition_type =
1387 map->s_partition_func =
1388 udf_get_pblock_virt20;
1390 } else if (!strncmp(upm2->partIdent.ident,
1392 strlen(UDF_ID_SPARABLE))) {
1394 struct sparingTable *st;
1395 struct sparablePartitionMap *spm =
1396 (struct sparablePartitionMap *)gpm;
1398 map->s_partition_type = UDF_SPARABLE_MAP15;
1399 map->s_type_specific.s_sparing.s_packet_len =
1400 le16_to_cpu(spm->packetLength);
1401 for (j = 0; j < spm->numSparingTables; j++) {
1402 struct buffer_head *bh2;
1405 spm->locSparingTable[j]);
1406 bh2 = udf_read_tagged(sb, loc, loc,
1408 map->s_type_specific.s_sparing.
1409 s_spar_map[j] = bh2;
1414 st = (struct sparingTable *)bh2->b_data;
1415 if (ident != 0 || strncmp(
1416 st->sparingIdent.ident,
1418 strlen(UDF_ID_SPARING))) {
1420 map->s_type_specific.s_sparing.
1421 s_spar_map[j] = NULL;
1424 map->s_partition_func = udf_get_pblock_spar15;
1425 } else if (!strncmp(upm2->partIdent.ident,
1427 strlen(UDF_ID_METADATA))) {
1428 struct udf_meta_data *mdata =
1429 &map->s_type_specific.s_metadata;
1430 struct metadataPartitionMap *mdm =
1431 (struct metadataPartitionMap *)
1432 &(lvd->partitionMaps[offset]);
1433 udf_debug("Parsing Logical vol part %d "
1434 "type %d id=%s\n", i, type,
1437 map->s_partition_type = UDF_METADATA_MAP25;
1438 map->s_partition_func = udf_get_pblock_meta25;
1440 mdata->s_meta_file_loc =
1441 le32_to_cpu(mdm->metadataFileLoc);
1442 mdata->s_mirror_file_loc =
1443 le32_to_cpu(mdm->metadataMirrorFileLoc);
1444 mdata->s_bitmap_file_loc =
1445 le32_to_cpu(mdm->metadataBitmapFileLoc);
1446 mdata->s_alloc_unit_size =
1447 le32_to_cpu(mdm->allocUnitSize);
1448 mdata->s_align_unit_size =
1449 le16_to_cpu(mdm->alignUnitSize);
1450 mdata->s_dup_md_flag =
1453 udf_debug("Metadata Ident suffix=0x%x\n",
1456 mdm->partIdent.identSuffix)[0])));
1457 udf_debug("Metadata part num=%d\n",
1458 le16_to_cpu(mdm->partitionNum));
1459 udf_debug("Metadata part alloc unit size=%d\n",
1460 le32_to_cpu(mdm->allocUnitSize));
1461 udf_debug("Metadata file loc=%d\n",
1462 le32_to_cpu(mdm->metadataFileLoc));
1463 udf_debug("Mirror file loc=%d\n",
1464 le32_to_cpu(mdm->metadataMirrorFileLoc));
1465 udf_debug("Bitmap file loc=%d\n",
1466 le32_to_cpu(mdm->metadataBitmapFileLoc));
1467 udf_debug("Duplicate Flag: %d %d\n",
1468 mdata->s_dup_md_flag, mdm->flags);
1470 udf_debug("Unknown ident: %s\n",
1471 upm2->partIdent.ident);
1474 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1475 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1477 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1478 i, map->s_partition_num, type,
1479 map->s_volumeseqnum);
1483 long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]);
1485 *fileset = lelb_to_cpu(la->extLocation);
1486 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1487 "partition=%d\n", fileset->logicalBlockNum,
1488 fileset->partitionReferenceNum);
1490 if (lvd->integritySeqExt.extLength)
1491 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1499 * udf_load_logicalvolint
1502 static void udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc)
1504 struct buffer_head *bh = NULL;
1506 struct udf_sb_info *sbi = UDF_SB(sb);
1507 struct logicalVolIntegrityDesc *lvid;
1509 while (loc.extLength > 0 &&
1510 (bh = udf_read_tagged(sb, loc.extLocation,
1511 loc.extLocation, &ident)) &&
1512 ident == TAG_IDENT_LVID) {
1513 sbi->s_lvid_bh = bh;
1514 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1516 if (lvid->nextIntegrityExt.extLength)
1517 udf_load_logicalvolint(sb,
1518 leea_to_cpu(lvid->nextIntegrityExt));
1520 if (sbi->s_lvid_bh != bh)
1522 loc.extLength -= sb->s_blocksize;
1525 if (sbi->s_lvid_bh != bh)
1530 * udf_process_sequence
1533 * Process a main/reserve volume descriptor sequence.
1536 * sb Pointer to _locked_ superblock.
1537 * block First block of first extent of the sequence.
1538 * lastblock Lastblock of first extent of the sequence.
1541 * July 1, 1997 - Andrew E. Mileski
1542 * Written, tested, and released.
1544 static noinline int udf_process_sequence(struct super_block *sb, long block,
1545 long lastblock, kernel_lb_addr *fileset)
1547 struct buffer_head *bh = NULL;
1548 struct udf_vds_record vds[VDS_POS_LENGTH];
1549 struct udf_vds_record *curr;
1550 struct generic_desc *gd;
1551 struct volDescPtr *vdp;
1555 long next_s = 0, next_e = 0;
1557 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1560 * Read the main descriptor sequence and find which descriptors
1563 for (; (!done && block <= lastblock); block++) {
1565 bh = udf_read_tagged(sb, block, block, &ident);
1567 printk(KERN_ERR "udf: Block %Lu of volume descriptor "
1568 "sequence is corrupted or we could not read "
1569 "it.\n", (unsigned long long)block);
1573 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1574 gd = (struct generic_desc *)bh->b_data;
1575 vdsn = le32_to_cpu(gd->volDescSeqNum);
1577 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1578 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1579 if (vdsn >= curr->volDescSeqNum) {
1580 curr->volDescSeqNum = vdsn;
1581 curr->block = block;
1584 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1585 curr = &vds[VDS_POS_VOL_DESC_PTR];
1586 if (vdsn >= curr->volDescSeqNum) {
1587 curr->volDescSeqNum = vdsn;
1588 curr->block = block;
1590 vdp = (struct volDescPtr *)bh->b_data;
1591 next_s = le32_to_cpu(
1592 vdp->nextVolDescSeqExt.extLocation);
1593 next_e = le32_to_cpu(
1594 vdp->nextVolDescSeqExt.extLength);
1595 next_e = next_e >> sb->s_blocksize_bits;
1599 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1600 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1601 if (vdsn >= curr->volDescSeqNum) {
1602 curr->volDescSeqNum = vdsn;
1603 curr->block = block;
1606 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1607 curr = &vds[VDS_POS_PARTITION_DESC];
1609 curr->block = block;
1611 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1612 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1613 if (vdsn >= curr->volDescSeqNum) {
1614 curr->volDescSeqNum = vdsn;
1615 curr->block = block;
1618 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1619 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1620 if (vdsn >= curr->volDescSeqNum) {
1621 curr->volDescSeqNum = vdsn;
1622 curr->block = block;
1625 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1626 vds[VDS_POS_TERMINATING_DESC].block = block;
1630 next_s = next_e = 0;
1638 * Now read interesting descriptors again and process them
1639 * in a suitable order
1641 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1642 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n");
1645 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1648 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1649 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1652 if (vds[VDS_POS_PARTITION_DESC].block) {
1654 * We rescan the whole descriptor sequence to find
1655 * partition descriptor blocks and process them.
1657 for (block = vds[VDS_POS_PARTITION_DESC].block;
1658 block < vds[VDS_POS_TERMINATING_DESC].block;
1660 if (udf_load_partdesc(sb, block))
1670 static int udf_check_valid(struct super_block *sb, int novrs, int silent)
1673 struct udf_sb_info *sbi = UDF_SB(sb);
1676 udf_debug("Validity check skipped because of novrs option\n");
1679 /* Check that it is NSR02 compliant */
1680 /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
1681 block = udf_vrs(sb, silent);
1683 udf_debug("Failed to read byte 32768. Assuming open "
1684 "disc. Skipping validity check\n");
1685 if (block && !sbi->s_last_block)
1686 sbi->s_last_block = udf_get_last_block(sb);
1690 static int udf_load_sequence(struct super_block *sb, kernel_lb_addr *fileset)
1692 struct anchorVolDescPtr *anchor;
1694 struct buffer_head *bh;
1695 long main_s, main_e, reserve_s, reserve_e;
1697 struct udf_sb_info *sbi;
1703 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
1704 if (!sbi->s_anchor[i])
1707 bh = udf_read_tagged(sb, sbi->s_anchor[i], sbi->s_anchor[i],
1712 anchor = (struct anchorVolDescPtr *)bh->b_data;
1714 /* Locate the main sequence */
1715 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1716 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1717 main_e = main_e >> sb->s_blocksize_bits;
1720 /* Locate the reserve sequence */
1721 reserve_s = le32_to_cpu(
1722 anchor->reserveVolDescSeqExt.extLocation);
1723 reserve_e = le32_to_cpu(
1724 anchor->reserveVolDescSeqExt.extLength);
1725 reserve_e = reserve_e >> sb->s_blocksize_bits;
1726 reserve_e += reserve_s;
1730 /* Process the main & reserve sequences */
1731 /* responsible for finding the PartitionDesc(s) */
1732 if (!(udf_process_sequence(sb, main_s, main_e,
1734 udf_process_sequence(sb, reserve_s, reserve_e,
1739 if (i == ARRAY_SIZE(sbi->s_anchor)) {
1740 udf_debug("No Anchor block found\n");
1743 udf_debug("Using anchor in block %d\n", sbi->s_anchor[i]);
1748 static void udf_open_lvid(struct super_block *sb)
1750 struct udf_sb_info *sbi = UDF_SB(sb);
1751 struct buffer_head *bh = sbi->s_lvid_bh;
1752 struct logicalVolIntegrityDesc *lvid;
1753 struct logicalVolIntegrityDescImpUse *lvidiu;
1757 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1758 lvidiu = udf_sb_lvidiu(sbi);
1760 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1761 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1762 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1764 lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN;
1766 lvid->descTag.descCRC = cpu_to_le16(
1767 udf_crc((char *)lvid + sizeof(tag),
1768 le16_to_cpu(lvid->descTag.descCRCLength), 0));
1770 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1771 mark_buffer_dirty(bh);
1774 static void udf_close_lvid(struct super_block *sb)
1776 struct udf_sb_info *sbi = UDF_SB(sb);
1777 struct buffer_head *bh = sbi->s_lvid_bh;
1778 struct logicalVolIntegrityDesc *lvid;
1779 struct logicalVolIntegrityDescImpUse *lvidiu;
1784 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1786 if (lvid->integrityType != LVID_INTEGRITY_TYPE_OPEN)
1789 lvidiu = udf_sb_lvidiu(sbi);
1790 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1791 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1792 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1793 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1794 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1795 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1796 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1797 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1798 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1799 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1801 lvid->descTag.descCRC = cpu_to_le16(
1802 udf_crc((char *)lvid + sizeof(tag),
1803 le16_to_cpu(lvid->descTag.descCRCLength),
1806 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1807 mark_buffer_dirty(bh);
1810 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1813 int nr_groups = bitmap->s_nr_groups;
1814 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1817 for (i = 0; i < nr_groups; i++)
1818 if (bitmap->s_block_bitmap[i])
1819 brelse(bitmap->s_block_bitmap[i]);
1821 if (size <= PAGE_SIZE)
1827 static void udf_free_partition(struct udf_part_map *map)
1830 struct udf_meta_data *mdata;
1832 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1833 iput(map->s_uspace.s_table);
1834 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1835 iput(map->s_fspace.s_table);
1836 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1837 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1838 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1839 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1840 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1841 for (i = 0; i < 4; i++)
1842 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
1843 else if (map->s_partition_type == UDF_METADATA_MAP25) {
1844 mdata = &map->s_type_specific.s_metadata;
1845 iput(mdata->s_metadata_fe);
1846 mdata->s_metadata_fe = NULL;
1848 iput(mdata->s_mirror_fe);
1849 mdata->s_mirror_fe = NULL;
1851 iput(mdata->s_bitmap_fe);
1852 mdata->s_bitmap_fe = NULL;
1856 static int udf_fill_super(struct super_block *sb, void *options, int silent)
1859 struct inode *inode = NULL;
1860 struct udf_options uopt;
1861 kernel_lb_addr rootdir, fileset;
1862 struct udf_sb_info *sbi;
1864 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1869 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1873 sb->s_fs_info = sbi;
1875 mutex_init(&sbi->s_alloc_mutex);
1877 if (!udf_parse_options((char *)options, &uopt, false))
1880 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
1881 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1882 udf_error(sb, "udf_read_super",
1883 "utf8 cannot be combined with iocharset\n");
1886 #ifdef CONFIG_UDF_NLS
1887 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1888 uopt.nls_map = load_nls_default();
1890 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1892 udf_debug("Using default NLS map\n");
1895 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1896 uopt.flags |= (1 << UDF_FLAG_UTF8);
1898 fileset.logicalBlockNum = 0xFFFFFFFF;
1899 fileset.partitionReferenceNum = 0xFFFF;
1901 sbi->s_flags = uopt.flags;
1902 sbi->s_uid = uopt.uid;
1903 sbi->s_gid = uopt.gid;
1904 sbi->s_umask = uopt.umask;
1905 sbi->s_nls_map = uopt.nls_map;
1907 /* Set the block size for all transfers */
1908 if (!sb_min_blocksize(sb, uopt.blocksize)) {
1909 udf_debug("Bad block size (%d)\n", uopt.blocksize);
1910 printk(KERN_ERR "udf: bad block size (%d)\n", uopt.blocksize);
1914 if (uopt.session == 0xFFFFFFFF)
1915 sbi->s_session = udf_get_last_session(sb);
1917 sbi->s_session = uopt.session;
1919 udf_debug("Multi-session=%d\n", sbi->s_session);
1921 sbi->s_last_block = uopt.lastblock;
1922 sbi->s_anchor[0] = sbi->s_anchor[1] = 0;
1923 sbi->s_anchor[2] = uopt.anchor;
1925 if (udf_check_valid(sb, uopt.novrs, silent)) {
1926 /* read volume recognition sequences */
1927 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1931 udf_find_anchor(sb);
1933 /* Fill in the rest of the superblock */
1934 sb->s_op = &udf_sb_ops;
1937 sb->s_magic = UDF_SUPER_MAGIC;
1938 sb->s_time_gran = 1000;
1940 if (udf_load_sequence(sb, &fileset)) {
1941 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
1945 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1947 if (sbi->s_lvid_bh) {
1948 struct logicalVolIntegrityDescImpUse *lvidiu =
1950 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1951 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
1952 /* uint16_t maxUDFWriteRev =
1953 le16_to_cpu(lvidiu->maxUDFWriteRev); */
1955 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
1956 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
1958 le16_to_cpu(lvidiu->minUDFReadRev),
1959 UDF_MAX_READ_VERSION);
1961 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
1962 sb->s_flags |= MS_RDONLY;
1964 sbi->s_udfrev = minUDFWriteRev;
1966 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
1967 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
1968 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
1969 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
1972 if (!sbi->s_partitions) {
1973 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
1977 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
1978 UDF_PART_FLAG_READ_ONLY) {
1979 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
1980 "forcing readonly mount\n");
1981 sb->s_flags |= MS_RDONLY;
1984 if (udf_find_fileset(sb, &fileset, &rootdir)) {
1985 printk(KERN_WARNING "UDF-fs: No fileset found\n");
1991 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
1992 udf_info("UDF: Mounting volume '%s', "
1993 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
1994 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
1995 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1997 if (!(sb->s_flags & MS_RDONLY))
2000 /* Assign the root inode */
2001 /* assign inodes by physical block number */
2002 /* perhaps it's not extensible enough, but for now ... */
2003 inode = udf_iget(sb, rootdir);
2005 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
2007 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2011 /* Allocate a dentry for the root inode */
2012 sb->s_root = d_alloc_root(inode);
2014 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
2018 sb->s_maxbytes = MAX_LFS_FILESIZE;
2022 if (sbi->s_vat_inode)
2023 iput(sbi->s_vat_inode);
2024 if (sbi->s_partitions)
2025 for (i = 0; i < sbi->s_partitions; i++)
2026 udf_free_partition(&sbi->s_partmaps[i]);
2027 #ifdef CONFIG_UDF_NLS
2028 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2029 unload_nls(sbi->s_nls_map);
2031 if (!(sb->s_flags & MS_RDONLY))
2033 brelse(sbi->s_lvid_bh);
2035 kfree(sbi->s_partmaps);
2037 sb->s_fs_info = NULL;
2042 static void udf_error(struct super_block *sb, const char *function,
2043 const char *fmt, ...)
2047 if (!(sb->s_flags & MS_RDONLY)) {
2051 va_start(args, fmt);
2052 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2054 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
2055 sb->s_id, function, error_buf);
2058 void udf_warning(struct super_block *sb, const char *function,
2059 const char *fmt, ...)
2063 va_start(args, fmt);
2064 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2066 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
2067 sb->s_id, function, error_buf);
2070 static void udf_put_super(struct super_block *sb)
2073 struct udf_sb_info *sbi;
2076 if (sbi->s_vat_inode)
2077 iput(sbi->s_vat_inode);
2078 if (sbi->s_partitions)
2079 for (i = 0; i < sbi->s_partitions; i++)
2080 udf_free_partition(&sbi->s_partmaps[i]);
2081 #ifdef CONFIG_UDF_NLS
2082 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2083 unload_nls(sbi->s_nls_map);
2085 if (!(sb->s_flags & MS_RDONLY))
2087 brelse(sbi->s_lvid_bh);
2088 kfree(sbi->s_partmaps);
2089 kfree(sb->s_fs_info);
2090 sb->s_fs_info = NULL;
2093 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2095 struct super_block *sb = dentry->d_sb;
2096 struct udf_sb_info *sbi = UDF_SB(sb);
2097 struct logicalVolIntegrityDescImpUse *lvidiu;
2099 if (sbi->s_lvid_bh != NULL)
2100 lvidiu = udf_sb_lvidiu(sbi);
2104 buf->f_type = UDF_SUPER_MAGIC;
2105 buf->f_bsize = sb->s_blocksize;
2106 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2107 buf->f_bfree = udf_count_free(sb);
2108 buf->f_bavail = buf->f_bfree;
2109 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2110 le32_to_cpu(lvidiu->numDirs)) : 0)
2112 buf->f_ffree = buf->f_bfree;
2113 /* __kernel_fsid_t f_fsid */
2114 buf->f_namelen = UDF_NAME_LEN - 2;
2119 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2120 struct udf_bitmap *bitmap)
2122 struct buffer_head *bh = NULL;
2123 unsigned int accum = 0;
2125 int block = 0, newblock;
2130 struct spaceBitmapDesc *bm;
2134 loc.logicalBlockNum = bitmap->s_extPosition;
2135 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2136 bh = udf_read_ptagged(sb, loc, 0, &ident);
2139 printk(KERN_ERR "udf: udf_count_free failed\n");
2141 } else if (ident != TAG_IDENT_SBD) {
2143 printk(KERN_ERR "udf: udf_count_free failed\n");
2147 bm = (struct spaceBitmapDesc *)bh->b_data;
2148 bytes = le32_to_cpu(bm->numOfBytes);
2149 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2150 ptr = (uint8_t *)bh->b_data;
2153 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2154 accum += bitmap_weight((const unsigned long *)(ptr + index),
2159 newblock = udf_get_lb_pblock(sb, loc, ++block);
2160 bh = udf_tread(sb, newblock);
2162 udf_debug("read failed\n");
2166 ptr = (uint8_t *)bh->b_data;
2177 static unsigned int udf_count_free_table(struct super_block *sb,
2178 struct inode *table)
2180 unsigned int accum = 0;
2182 kernel_lb_addr eloc;
2184 struct extent_position epos;
2188 epos.block = UDF_I(table)->i_location;
2189 epos.offset = sizeof(struct unallocSpaceEntry);
2192 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2193 accum += (elen >> table->i_sb->s_blocksize_bits);
2202 static unsigned int udf_count_free(struct super_block *sb)
2204 unsigned int accum = 0;
2205 struct udf_sb_info *sbi;
2206 struct udf_part_map *map;
2209 if (sbi->s_lvid_bh) {
2210 struct logicalVolIntegrityDesc *lvid =
2211 (struct logicalVolIntegrityDesc *)
2212 sbi->s_lvid_bh->b_data;
2213 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2214 accum = le32_to_cpu(
2215 lvid->freeSpaceTable[sbi->s_partition]);
2216 if (accum == 0xFFFFFFFF)
2224 map = &sbi->s_partmaps[sbi->s_partition];
2225 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2226 accum += udf_count_free_bitmap(sb,
2227 map->s_uspace.s_bitmap);
2229 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2230 accum += udf_count_free_bitmap(sb,
2231 map->s_fspace.s_bitmap);
2236 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2237 accum += udf_count_free_table(sb,
2238 map->s_uspace.s_table);
2240 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2241 accum += udf_count_free_table(sb,
2242 map->s_fspace.s_table);