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 int udf_load_partition(struct super_block *, kernel_lb_addr *);
88 static int udf_load_logicalvol(struct super_block *, struct buffer_head *,
90 static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad);
91 static void udf_find_anchor(struct super_block *);
92 static int udf_find_fileset(struct super_block *, kernel_lb_addr *,
94 static void udf_load_pvoldesc(struct super_block *, struct buffer_head *);
95 static void udf_load_fileset(struct super_block *, struct buffer_head *,
97 static int udf_load_partdesc(struct super_block *, struct buffer_head *);
98 static void udf_open_lvid(struct super_block *);
99 static void udf_close_lvid(struct super_block *);
100 static unsigned int udf_count_free(struct super_block *);
101 static int udf_statfs(struct dentry *, struct kstatfs *);
102 static int udf_show_options(struct seq_file *, struct vfsmount *);
103 static void udf_error(struct super_block *sb, const char *function,
104 const char *fmt, ...);
106 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
108 struct logicalVolIntegrityDesc *lvid =
109 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
110 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
111 __u32 offset = number_of_partitions * 2 *
112 sizeof(uint32_t)/sizeof(uint8_t);
113 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
116 /* UDF filesystem type */
117 static int udf_get_sb(struct file_system_type *fs_type,
118 int flags, const char *dev_name, void *data,
119 struct vfsmount *mnt)
121 return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt);
124 static struct file_system_type udf_fstype = {
125 .owner = THIS_MODULE,
127 .get_sb = udf_get_sb,
128 .kill_sb = kill_block_super,
129 .fs_flags = FS_REQUIRES_DEV,
132 static struct kmem_cache *udf_inode_cachep;
134 static struct inode *udf_alloc_inode(struct super_block *sb)
136 struct udf_inode_info *ei;
137 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
142 ei->i_lenExtents = 0;
143 ei->i_next_alloc_block = 0;
144 ei->i_next_alloc_goal = 0;
147 return &ei->vfs_inode;
150 static void udf_destroy_inode(struct inode *inode)
152 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
155 static void init_once(struct kmem_cache *cachep, void *foo)
157 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
159 ei->i_ext.i_data = NULL;
160 inode_init_once(&ei->vfs_inode);
163 static int init_inodecache(void)
165 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
166 sizeof(struct udf_inode_info),
167 0, (SLAB_RECLAIM_ACCOUNT |
170 if (!udf_inode_cachep)
175 static void destroy_inodecache(void)
177 kmem_cache_destroy(udf_inode_cachep);
180 /* Superblock operations */
181 static const struct super_operations udf_sb_ops = {
182 .alloc_inode = udf_alloc_inode,
183 .destroy_inode = udf_destroy_inode,
184 .write_inode = udf_write_inode,
185 .delete_inode = udf_delete_inode,
186 .clear_inode = udf_clear_inode,
187 .put_super = udf_put_super,
188 .write_super = udf_write_super,
189 .statfs = udf_statfs,
190 .remount_fs = udf_remount_fs,
191 .show_options = udf_show_options,
196 unsigned int blocksize;
197 unsigned int session;
198 unsigned int lastblock;
201 unsigned short partition;
202 unsigned int fileset;
203 unsigned int rootdir;
208 struct nls_table *nls_map;
211 static int __init init_udf_fs(void)
215 err = init_inodecache();
218 err = register_filesystem(&udf_fstype);
225 destroy_inodecache();
231 static void __exit exit_udf_fs(void)
233 unregister_filesystem(&udf_fstype);
234 destroy_inodecache();
237 module_init(init_udf_fs)
238 module_exit(exit_udf_fs)
240 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
242 struct udf_sb_info *sbi = UDF_SB(sb);
244 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
246 if (!sbi->s_partmaps) {
247 udf_error(sb, __FUNCTION__,
248 "Unable to allocate space for %d partition maps",
250 sbi->s_partitions = 0;
254 sbi->s_partitions = count;
258 static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
260 struct super_block *sb = mnt->mnt_sb;
261 struct udf_sb_info *sbi = UDF_SB(sb);
263 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
264 seq_puts(seq, ",nostrict");
265 if (sb->s_blocksize != UDF_DEFAULT_BLOCKSIZE)
266 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
267 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
268 seq_puts(seq, ",unhide");
269 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
270 seq_puts(seq, ",undelete");
271 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
272 seq_puts(seq, ",noadinicb");
273 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
274 seq_puts(seq, ",shortad");
275 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
276 seq_puts(seq, ",uid=forget");
277 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
278 seq_puts(seq, ",uid=ignore");
279 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
280 seq_puts(seq, ",gid=forget");
281 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
282 seq_puts(seq, ",gid=ignore");
283 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
284 seq_printf(seq, ",uid=%u", sbi->s_uid);
285 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
286 seq_printf(seq, ",gid=%u", sbi->s_gid);
287 if (sbi->s_umask != 0)
288 seq_printf(seq, ",umask=%o", sbi->s_umask);
289 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
290 seq_printf(seq, ",session=%u", sbi->s_session);
291 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
292 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
294 * s_anchor[2] could be zeroed out in case there is no anchor
295 * in the specified block, but then the "anchor=N" option
296 * originally given by the user wasn't effective, so it's OK
297 * if we don't show it.
299 if (sbi->s_anchor[2] != 0)
300 seq_printf(seq, ",anchor=%u", sbi->s_anchor[2]);
302 * volume, partition, fileset and rootdir seem to be ignored
305 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
306 seq_puts(seq, ",utf8");
307 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
308 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
317 * Parse mount options.
320 * The following mount options are supported:
322 * gid= Set the default group.
323 * umask= Set the default umask.
324 * uid= Set the default user.
325 * bs= Set the block size.
326 * unhide Show otherwise hidden files.
327 * undelete Show deleted files in lists.
328 * adinicb Embed data in the inode (default)
329 * noadinicb Don't embed data in the inode
330 * shortad Use short ad's
331 * longad Use long ad's (default)
332 * nostrict Unset strict conformance
333 * iocharset= Set the NLS character set
335 * The remaining are for debugging and disaster recovery:
337 * novrs Skip volume sequence recognition
339 * The following expect a offset from 0.
341 * session= Set the CDROM session (default= last session)
342 * anchor= Override standard anchor location. (default= 256)
343 * volume= Override the VolumeDesc location. (unused)
344 * partition= Override the PartitionDesc location. (unused)
345 * lastblock= Set the last block of the filesystem/
347 * The following expect a offset from the partition root.
349 * fileset= Override the fileset block location. (unused)
350 * rootdir= Override the root directory location. (unused)
351 * WARNING: overriding the rootdir to a non-directory may
352 * yield highly unpredictable results.
355 * options Pointer to mount options string.
356 * uopts Pointer to mount options variable.
359 * <return> 1 Mount options parsed okay.
360 * <return> 0 Error parsing mount options.
363 * July 1, 1997 - Andrew E. Mileski
364 * Written, tested, and released.
368 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
369 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
370 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
371 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
372 Opt_rootdir, Opt_utf8, Opt_iocharset,
373 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore
376 static match_table_t tokens = {
377 {Opt_novrs, "novrs"},
378 {Opt_nostrict, "nostrict"},
380 {Opt_unhide, "unhide"},
381 {Opt_undelete, "undelete"},
382 {Opt_noadinicb, "noadinicb"},
383 {Opt_adinicb, "adinicb"},
384 {Opt_shortad, "shortad"},
385 {Opt_longad, "longad"},
386 {Opt_uforget, "uid=forget"},
387 {Opt_uignore, "uid=ignore"},
388 {Opt_gforget, "gid=forget"},
389 {Opt_gignore, "gid=ignore"},
392 {Opt_umask, "umask=%o"},
393 {Opt_session, "session=%u"},
394 {Opt_lastblock, "lastblock=%u"},
395 {Opt_anchor, "anchor=%u"},
396 {Opt_volume, "volume=%u"},
397 {Opt_partition, "partition=%u"},
398 {Opt_fileset, "fileset=%u"},
399 {Opt_rootdir, "rootdir=%u"},
401 {Opt_iocharset, "iocharset=%s"},
405 static int udf_parse_options(char *options, struct udf_options *uopt,
412 uopt->blocksize = UDF_DEFAULT_BLOCKSIZE;
413 uopt->partition = 0xFFFF;
414 uopt->session = 0xFFFFFFFF;
417 uopt->volume = 0xFFFFFFFF;
418 uopt->rootdir = 0xFFFFFFFF;
419 uopt->fileset = 0xFFFFFFFF;
420 uopt->nls_map = NULL;
425 while ((p = strsep(&options, ",")) != NULL) {
426 substring_t args[MAX_OPT_ARGS];
431 token = match_token(p, tokens, args);
436 if (match_int(&args[0], &option))
438 uopt->blocksize = option;
441 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
444 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
447 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
450 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
453 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
456 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
459 if (match_int(args, &option))
462 uopt->flags |= (1 << UDF_FLAG_GID_SET);
465 if (match_int(args, &option))
468 uopt->flags |= (1 << UDF_FLAG_UID_SET);
471 if (match_octal(args, &option))
473 uopt->umask = option;
476 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
479 if (match_int(args, &option))
481 uopt->session = option;
483 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
486 if (match_int(args, &option))
488 uopt->lastblock = option;
490 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
493 if (match_int(args, &option))
495 uopt->anchor = option;
498 if (match_int(args, &option))
500 uopt->volume = option;
503 if (match_int(args, &option))
505 uopt->partition = option;
508 if (match_int(args, &option))
510 uopt->fileset = option;
513 if (match_int(args, &option))
515 uopt->rootdir = option;
518 uopt->flags |= (1 << UDF_FLAG_UTF8);
520 #ifdef CONFIG_UDF_NLS
522 uopt->nls_map = load_nls(args[0].from);
523 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
527 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
530 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
533 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
536 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
539 printk(KERN_ERR "udf: bad mount option \"%s\" "
540 "or missing value\n", p);
547 static void udf_write_super(struct super_block *sb)
551 if (!(sb->s_flags & MS_RDONLY))
558 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
560 struct udf_options uopt;
561 struct udf_sb_info *sbi = UDF_SB(sb);
563 uopt.flags = sbi->s_flags;
564 uopt.uid = sbi->s_uid;
565 uopt.gid = sbi->s_gid;
566 uopt.umask = sbi->s_umask;
568 if (!udf_parse_options(options, &uopt, true))
571 sbi->s_flags = uopt.flags;
572 sbi->s_uid = uopt.uid;
573 sbi->s_gid = uopt.gid;
574 sbi->s_umask = uopt.umask;
576 if (sbi->s_lvid_bh) {
577 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
578 if (write_rev > UDF_MAX_WRITE_VERSION)
582 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
584 if (*flags & MS_RDONLY)
592 static int udf_vrs(struct super_block *sb, int silent)
594 struct volStructDesc *vsd = NULL;
597 struct buffer_head *bh = NULL;
601 struct udf_sb_info *sbi;
603 /* Block size must be a multiple of 512 */
604 if (sb->s_blocksize & 511)
608 if (sb->s_blocksize < sizeof(struct volStructDesc))
609 sectorsize = sizeof(struct volStructDesc);
611 sectorsize = sb->s_blocksize;
613 sector += (sbi->s_session << sb->s_blocksize_bits);
615 udf_debug("Starting at sector %u (%ld byte sectors)\n",
616 (sector >> sb->s_blocksize_bits), sb->s_blocksize);
617 /* Process the sequence (if applicable) */
618 for (; !nsr02 && !nsr03; sector += sectorsize) {
620 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
624 /* Look for ISO descriptors */
625 vsd = (struct volStructDesc *)(bh->b_data +
626 (sector & (sb->s_blocksize - 1)));
628 if (vsd->stdIdent[0] == 0) {
631 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
634 switch (vsd->structType) {
636 udf_debug("ISO9660 Boot Record found\n");
639 udf_debug("ISO9660 Primary Volume Descriptor "
643 udf_debug("ISO9660 Supplementary Volume "
644 "Descriptor found\n");
647 udf_debug("ISO9660 Volume Partition Descriptor "
651 udf_debug("ISO9660 Volume Descriptor Set "
652 "Terminator found\n");
655 udf_debug("ISO9660 VRS (%u) found\n",
659 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
662 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
666 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
669 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
679 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
689 * Find an anchor volume descriptor.
692 * sb Pointer to _locked_ superblock.
693 * lastblock Last block on media.
696 * <return> 1 if not found, 0 if ok
699 * July 1, 1997 - Andrew E. Mileski
700 * Written, tested, and released.
702 static void udf_find_anchor(struct super_block *sb)
705 struct buffer_head *bh = NULL;
709 struct udf_sb_info *sbi;
712 lastblock = sbi->s_last_block;
715 int varlastblock = udf_variable_to_fixed(lastblock);
716 int last[] = { lastblock, lastblock - 2,
717 lastblock - 150, lastblock - 152,
718 varlastblock, varlastblock - 2,
719 varlastblock - 150, varlastblock - 152 };
723 /* Search for an anchor volume descriptor pointer */
725 /* according to spec, anchor is in either:
729 * however, if the disc isn't closed, it could be 512 */
731 for (i = 0; !lastblock && i < ARRAY_SIZE(last); i++) {
732 ident = location = 0;
734 bh = sb_bread(sb, last[i]);
736 tag *t = (tag *)bh->b_data;
737 ident = le16_to_cpu(t->tagIdent);
738 location = le32_to_cpu(t->tagLocation);
743 if (ident == TAG_IDENT_AVDP) {
744 if (location == last[i] - sbi->s_session) {
745 lastblock = last[i] - sbi->s_session;
746 sbi->s_anchor[0] = lastblock;
747 sbi->s_anchor[1] = lastblock - 256;
748 } else if (location ==
749 udf_variable_to_fixed(last[i]) -
751 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
753 udf_variable_to_fixed(last[i]) -
755 sbi->s_anchor[0] = lastblock;
756 sbi->s_anchor[1] = lastblock - 256 -
759 udf_debug("Anchor found at block %d, "
760 "location mismatch %d.\n",
763 } else if (ident == TAG_IDENT_FE ||
764 ident == TAG_IDENT_EFE) {
766 sbi->s_anchor[3] = 512;
768 ident = location = 0;
769 if (last[i] >= 256) {
770 bh = sb_bread(sb, last[i] - 256);
772 tag *t = (tag *)bh->b_data;
775 location = le32_to_cpu(
781 if (ident == TAG_IDENT_AVDP &&
782 location == last[i] - 256 -
785 sbi->s_anchor[1] = last[i] - 256;
787 ident = location = 0;
788 if (last[i] >= 312 + sbi->s_session) {
797 location = le32_to_cpu(
803 if (ident == TAG_IDENT_AVDP &&
804 location == udf_variable_to_fixed(last[i]) - 256) {
807 lastblock = udf_variable_to_fixed(last[i]);
808 sbi->s_anchor[1] = lastblock - 256;
816 /* We haven't found the lastblock. check 312 */
817 bh = sb_bread(sb, 312 + sbi->s_session);
819 tag *t = (tag *)bh->b_data;
820 ident = le16_to_cpu(t->tagIdent);
821 location = le32_to_cpu(t->tagLocation);
824 if (ident == TAG_IDENT_AVDP && location == 256)
825 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
829 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
830 if (sbi->s_anchor[i]) {
831 bh = udf_read_tagged(sb, sbi->s_anchor[i],
832 sbi->s_anchor[i], &ident);
834 sbi->s_anchor[i] = 0;
837 if ((ident != TAG_IDENT_AVDP) &&
838 (i || (ident != TAG_IDENT_FE &&
839 ident != TAG_IDENT_EFE)))
840 sbi->s_anchor[i] = 0;
845 sbi->s_last_block = lastblock;
848 static int udf_find_fileset(struct super_block *sb,
849 kernel_lb_addr *fileset,
850 kernel_lb_addr *root)
852 struct buffer_head *bh = NULL;
855 struct udf_sb_info *sbi;
857 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
858 fileset->partitionReferenceNum != 0xFFFF) {
859 bh = udf_read_ptagged(sb, *fileset, 0, &ident);
863 } else if (ident != TAG_IDENT_FSD) {
872 /* Search backwards through the partitions */
873 kernel_lb_addr newfileset;
875 /* --> cvg: FIXME - is it reasonable? */
878 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
879 (newfileset.partitionReferenceNum != 0xFFFF &&
880 fileset->logicalBlockNum == 0xFFFFFFFF &&
881 fileset->partitionReferenceNum == 0xFFFF);
882 newfileset.partitionReferenceNum--) {
883 lastblock = sbi->s_partmaps
884 [newfileset.partitionReferenceNum]
886 newfileset.logicalBlockNum = 0;
889 bh = udf_read_ptagged(sb, newfileset, 0,
892 newfileset.logicalBlockNum++;
899 struct spaceBitmapDesc *sp;
900 sp = (struct spaceBitmapDesc *)
902 newfileset.logicalBlockNum += 1 +
903 ((le32_to_cpu(sp->numOfBytes) +
904 sizeof(struct spaceBitmapDesc)
905 - 1) >> sb->s_blocksize_bits);
910 *fileset = newfileset;
913 newfileset.logicalBlockNum++;
918 } while (newfileset.logicalBlockNum < lastblock &&
919 fileset->logicalBlockNum == 0xFFFFFFFF &&
920 fileset->partitionReferenceNum == 0xFFFF);
924 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
925 fileset->partitionReferenceNum != 0xFFFF) && bh) {
926 udf_debug("Fileset at block=%d, partition=%d\n",
927 fileset->logicalBlockNum,
928 fileset->partitionReferenceNum);
930 sbi->s_partition = fileset->partitionReferenceNum;
931 udf_load_fileset(sb, bh, root);
938 static void udf_load_pvoldesc(struct super_block *sb, struct buffer_head *bh)
940 struct primaryVolDesc *pvoldesc;
944 pvoldesc = (struct primaryVolDesc *)bh->b_data;
946 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
947 pvoldesc->recordingDateAndTime)) {
949 timestamp *ts = &pvoldesc->recordingDateAndTime;
950 udf_debug("recording time %04u/%02u/%02u"
952 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
953 ts->minute, le16_to_cpu(ts->typeAndTimezone));
957 if (!udf_build_ustr(&instr, pvoldesc->volIdent, 32))
958 if (udf_CS0toUTF8(&outstr, &instr)) {
959 strncpy(UDF_SB(sb)->s_volume_ident, outstr.u_name,
960 outstr.u_len > 31 ? 31 : outstr.u_len);
961 udf_debug("volIdent[] = '%s'\n",
962 UDF_SB(sb)->s_volume_ident);
965 if (!udf_build_ustr(&instr, pvoldesc->volSetIdent, 128))
966 if (udf_CS0toUTF8(&outstr, &instr))
967 udf_debug("volSetIdent[] = '%s'\n", outstr.u_name);
970 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
971 kernel_lb_addr *root)
973 struct fileSetDesc *fset;
975 fset = (struct fileSetDesc *)bh->b_data;
977 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
979 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
981 udf_debug("Rootdir at block=%d, partition=%d\n",
982 root->logicalBlockNum, root->partitionReferenceNum);
985 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
987 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
988 return DIV_ROUND_UP(map->s_partition_len +
989 (sizeof(struct spaceBitmapDesc) << 3),
990 sb->s_blocksize * 8);
993 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
995 struct udf_bitmap *bitmap;
999 nr_groups = udf_compute_nr_groups(sb, index);
1000 size = sizeof(struct udf_bitmap) +
1001 (sizeof(struct buffer_head *) * nr_groups);
1003 if (size <= PAGE_SIZE)
1004 bitmap = kmalloc(size, GFP_KERNEL);
1006 bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
1008 if (bitmap == NULL) {
1009 udf_error(sb, __FUNCTION__,
1010 "Unable to allocate space for bitmap "
1011 "and %d buffer_head pointers", nr_groups);
1015 memset(bitmap, 0x00, size);
1016 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
1017 bitmap->s_nr_groups = nr_groups;
1021 static int udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
1023 struct partitionDesc *p;
1025 struct udf_part_map *map;
1026 struct udf_sb_info *sbi;
1028 p = (struct partitionDesc *)bh->b_data;
1031 for (i = 0; i < sbi->s_partitions; i++) {
1032 map = &sbi->s_partmaps[i];
1033 udf_debug("Searching map: (%d == %d)\n",
1034 map->s_partition_num,
1035 le16_to_cpu(p->partitionNumber));
1036 if (map->s_partition_num ==
1037 le16_to_cpu(p->partitionNumber)) {
1038 map->s_partition_len =
1039 le32_to_cpu(p->partitionLength); /* blocks */
1040 map->s_partition_root =
1041 le32_to_cpu(p->partitionStartingLocation);
1042 if (p->accessType ==
1043 cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1044 map->s_partition_flags |=
1045 UDF_PART_FLAG_READ_ONLY;
1046 if (p->accessType ==
1047 cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1048 map->s_partition_flags |=
1049 UDF_PART_FLAG_WRITE_ONCE;
1050 if (p->accessType ==
1051 cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1052 map->s_partition_flags |=
1053 UDF_PART_FLAG_REWRITABLE;
1054 if (p->accessType ==
1055 cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1056 map->s_partition_flags |=
1057 UDF_PART_FLAG_OVERWRITABLE;
1059 if (!strcmp(p->partitionContents.ident,
1060 PD_PARTITION_CONTENTS_NSR02) ||
1061 !strcmp(p->partitionContents.ident,
1062 PD_PARTITION_CONTENTS_NSR03)) {
1063 struct partitionHeaderDesc *phd;
1065 phd = (struct partitionHeaderDesc *)
1066 (p->partitionContentsUse);
1067 if (phd->unallocSpaceTable.extLength) {
1068 kernel_lb_addr loc = {
1069 .logicalBlockNum = le32_to_cpu(phd->unallocSpaceTable.extPosition),
1070 .partitionReferenceNum = i,
1073 map->s_uspace.s_table =
1075 if (!map->s_uspace.s_table) {
1076 udf_debug("cannot load unallocSpaceTable (part %d)\n", i);
1079 map->s_partition_flags |=
1080 UDF_PART_FLAG_UNALLOC_TABLE;
1081 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1082 i, map->s_uspace.s_table->i_ino);
1084 if (phd->unallocSpaceBitmap.extLength) {
1085 struct udf_bitmap *bitmap =
1086 udf_sb_alloc_bitmap(sb, i);
1087 map->s_uspace.s_bitmap = bitmap;
1088 if (bitmap != NULL) {
1089 bitmap->s_extLength =
1090 le32_to_cpu(phd->unallocSpaceBitmap.extLength);
1091 bitmap->s_extPosition =
1092 le32_to_cpu(phd->unallocSpaceBitmap.extPosition);
1093 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1094 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1095 i, bitmap->s_extPosition);
1098 if (phd->partitionIntegrityTable.extLength)
1099 udf_debug("partitionIntegrityTable (part %d)\n", i);
1100 if (phd->freedSpaceTable.extLength) {
1101 kernel_lb_addr loc = {
1102 .logicalBlockNum = le32_to_cpu(phd->freedSpaceTable.extPosition),
1103 .partitionReferenceNum = i,
1106 map->s_fspace.s_table =
1108 if (!map->s_fspace.s_table) {
1109 udf_debug("cannot load freedSpaceTable (part %d)\n", i);
1112 map->s_partition_flags |=
1113 UDF_PART_FLAG_FREED_TABLE;
1114 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1115 i, map->s_fspace.s_table->i_ino);
1117 if (phd->freedSpaceBitmap.extLength) {
1118 struct udf_bitmap *bitmap =
1119 udf_sb_alloc_bitmap(sb, i);
1120 map->s_fspace.s_bitmap = bitmap;
1121 if (bitmap != NULL) {
1122 bitmap->s_extLength =
1123 le32_to_cpu(phd->freedSpaceBitmap.extLength);
1124 bitmap->s_extPosition =
1125 le32_to_cpu(phd->freedSpaceBitmap.extPosition);
1126 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1127 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1128 i, bitmap->s_extPosition);
1135 if (i == sbi->s_partitions)
1136 udf_debug("Partition (%d) not found in partition map\n",
1137 le16_to_cpu(p->partitionNumber));
1139 udf_debug("Partition (%d:%d type %x) starts at physical %d, "
1140 "block length %d\n",
1141 le16_to_cpu(p->partitionNumber), i,
1142 map->s_partition_type,
1143 map->s_partition_root,
1144 map->s_partition_len);
1148 static int udf_load_logicalvol(struct super_block *sb, struct buffer_head *bh,
1149 kernel_lb_addr *fileset)
1151 struct logicalVolDesc *lvd;
1154 struct udf_sb_info *sbi = UDF_SB(sb);
1155 struct genericPartitionMap *gpm;
1157 lvd = (struct logicalVolDesc *)bh->b_data;
1159 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1163 for (i = 0, offset = 0;
1164 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
1165 i++, offset += gpm->partitionMapLength) {
1166 struct udf_part_map *map = &sbi->s_partmaps[i];
1167 gpm = (struct genericPartitionMap *)
1168 &(lvd->partitionMaps[offset]);
1169 type = gpm->partitionMapType;
1171 struct genericPartitionMap1 *gpm1 =
1172 (struct genericPartitionMap1 *)gpm;
1173 map->s_partition_type = UDF_TYPE1_MAP15;
1174 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1175 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1176 map->s_partition_func = NULL;
1177 } else if (type == 2) {
1178 struct udfPartitionMap2 *upm2 =
1179 (struct udfPartitionMap2 *)gpm;
1180 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1181 strlen(UDF_ID_VIRTUAL))) {
1183 le16_to_cpu(((__le16 *)upm2->partIdent.
1185 if (suf == 0x0150) {
1186 map->s_partition_type =
1188 map->s_partition_func =
1189 udf_get_pblock_virt15;
1190 } else if (suf == 0x0200) {
1191 map->s_partition_type =
1193 map->s_partition_func =
1194 udf_get_pblock_virt20;
1196 } else if (!strncmp(upm2->partIdent.ident,
1198 strlen(UDF_ID_SPARABLE))) {
1201 struct sparingTable *st;
1202 struct sparablePartitionMap *spm =
1203 (struct sparablePartitionMap *)gpm;
1205 map->s_partition_type = UDF_SPARABLE_MAP15;
1206 map->s_type_specific.s_sparing.s_packet_len =
1207 le16_to_cpu(spm->packetLength);
1208 for (j = 0; j < spm->numSparingTables; j++) {
1209 struct buffer_head *bh2;
1212 spm->locSparingTable[j]);
1213 bh2 = udf_read_tagged(sb, loc, loc,
1215 map->s_type_specific.s_sparing.
1216 s_spar_map[j] = bh2;
1219 st = (struct sparingTable *)
1221 if (ident != 0 || strncmp(
1222 st->sparingIdent.ident,
1224 strlen(UDF_ID_SPARING))) {
1226 map->s_type_specific.
1233 map->s_partition_func = udf_get_pblock_spar15;
1235 udf_debug("Unknown ident: %s\n",
1236 upm2->partIdent.ident);
1239 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1240 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1242 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1243 i, map->s_partition_num, type,
1244 map->s_volumeseqnum);
1248 long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]);
1250 *fileset = lelb_to_cpu(la->extLocation);
1251 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1252 "partition=%d\n", fileset->logicalBlockNum,
1253 fileset->partitionReferenceNum);
1255 if (lvd->integritySeqExt.extLength)
1256 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1262 * udf_load_logicalvolint
1265 static void udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc)
1267 struct buffer_head *bh = NULL;
1269 struct udf_sb_info *sbi = UDF_SB(sb);
1270 struct logicalVolIntegrityDesc *lvid;
1272 while (loc.extLength > 0 &&
1273 (bh = udf_read_tagged(sb, loc.extLocation,
1274 loc.extLocation, &ident)) &&
1275 ident == TAG_IDENT_LVID) {
1276 sbi->s_lvid_bh = bh;
1277 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1279 if (lvid->nextIntegrityExt.extLength)
1280 udf_load_logicalvolint(sb,
1281 leea_to_cpu(lvid->nextIntegrityExt));
1283 if (sbi->s_lvid_bh != bh)
1285 loc.extLength -= sb->s_blocksize;
1288 if (sbi->s_lvid_bh != bh)
1293 * udf_process_sequence
1296 * Process a main/reserve volume descriptor sequence.
1299 * sb Pointer to _locked_ superblock.
1300 * block First block of first extent of the sequence.
1301 * lastblock Lastblock of first extent of the sequence.
1304 * July 1, 1997 - Andrew E. Mileski
1305 * Written, tested, and released.
1307 static int udf_process_sequence(struct super_block *sb, long block,
1308 long lastblock, kernel_lb_addr *fileset)
1310 struct buffer_head *bh = NULL;
1311 struct udf_vds_record vds[VDS_POS_LENGTH];
1312 struct udf_vds_record *curr;
1313 struct generic_desc *gd;
1314 struct volDescPtr *vdp;
1319 long next_s = 0, next_e = 0;
1321 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1323 /* Read the main descriptor sequence */
1324 for (; (!done && block <= lastblock); block++) {
1326 bh = udf_read_tagged(sb, block, block, &ident);
1330 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1331 gd = (struct generic_desc *)bh->b_data;
1332 vdsn = le32_to_cpu(gd->volDescSeqNum);
1334 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1335 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1336 if (vdsn >= curr->volDescSeqNum) {
1337 curr->volDescSeqNum = vdsn;
1338 curr->block = block;
1341 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1342 curr = &vds[VDS_POS_VOL_DESC_PTR];
1343 if (vdsn >= curr->volDescSeqNum) {
1344 curr->volDescSeqNum = vdsn;
1345 curr->block = block;
1347 vdp = (struct volDescPtr *)bh->b_data;
1348 next_s = le32_to_cpu(
1349 vdp->nextVolDescSeqExt.extLocation);
1350 next_e = le32_to_cpu(
1351 vdp->nextVolDescSeqExt.extLength);
1352 next_e = next_e >> sb->s_blocksize_bits;
1356 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1357 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1358 if (vdsn >= curr->volDescSeqNum) {
1359 curr->volDescSeqNum = vdsn;
1360 curr->block = block;
1363 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1364 curr = &vds[VDS_POS_PARTITION_DESC];
1366 curr->block = block;
1368 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1369 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1370 if (vdsn >= curr->volDescSeqNum) {
1371 curr->volDescSeqNum = vdsn;
1372 curr->block = block;
1375 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1376 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1377 if (vdsn >= curr->volDescSeqNum) {
1378 curr->volDescSeqNum = vdsn;
1379 curr->block = block;
1382 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1383 vds[VDS_POS_TERMINATING_DESC].block = block;
1387 next_s = next_e = 0;
1394 for (i = 0; i < VDS_POS_LENGTH; i++) {
1396 bh = udf_read_tagged(sb, vds[i].block, vds[i].block,
1399 if (i == VDS_POS_PRIMARY_VOL_DESC) {
1400 udf_load_pvoldesc(sb, bh);
1401 } else if (i == VDS_POS_LOGICAL_VOL_DESC) {
1402 if (udf_load_logicalvol(sb, bh, fileset)) {
1406 } else if (i == VDS_POS_PARTITION_DESC) {
1407 struct buffer_head *bh2 = NULL;
1408 if (udf_load_partdesc(sb, bh)) {
1412 for (j = vds[i].block + 1;
1413 j < vds[VDS_POS_TERMINATING_DESC].block;
1415 bh2 = udf_read_tagged(sb, j, j, &ident);
1416 gd = (struct generic_desc *)bh2->b_data;
1417 if (ident == TAG_IDENT_PD)
1418 if (udf_load_partdesc(sb,
1437 static int udf_check_valid(struct super_block *sb, int novrs, int silent)
1442 udf_debug("Validity check skipped because of novrs option\n");
1445 /* Check that it is NSR02 compliant */
1446 /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
1448 block = udf_vrs(sb, silent);
1450 struct udf_sb_info *sbi = UDF_SB(sb);
1451 udf_debug("Failed to read byte 32768. Assuming open "
1452 "disc. Skipping validity check\n");
1453 if (!sbi->s_last_block)
1454 sbi->s_last_block = udf_get_last_block(sb);
1461 static int udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset)
1463 struct anchorVolDescPtr *anchor;
1465 struct buffer_head *bh;
1466 long main_s, main_e, reserve_s, reserve_e;
1468 struct udf_sb_info *sbi;
1474 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
1475 if (!sbi->s_anchor[i])
1477 bh = udf_read_tagged(sb, sbi->s_anchor[i], sbi->s_anchor[i],
1482 anchor = (struct anchorVolDescPtr *)bh->b_data;
1484 /* Locate the main sequence */
1485 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1486 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1487 main_e = main_e >> sb->s_blocksize_bits;
1490 /* Locate the reserve sequence */
1491 reserve_s = le32_to_cpu(
1492 anchor->reserveVolDescSeqExt.extLocation);
1493 reserve_e = le32_to_cpu(
1494 anchor->reserveVolDescSeqExt.extLength);
1495 reserve_e = reserve_e >> sb->s_blocksize_bits;
1496 reserve_e += reserve_s;
1500 /* Process the main & reserve sequences */
1501 /* responsible for finding the PartitionDesc(s) */
1502 if (!(udf_process_sequence(sb, main_s, main_e,
1504 udf_process_sequence(sb, reserve_s, reserve_e,
1509 if (i == ARRAY_SIZE(sbi->s_anchor)) {
1510 udf_debug("No Anchor block found\n");
1513 udf_debug("Using anchor in block %d\n", sbi->s_anchor[i]);
1515 for (i = 0; i < sbi->s_partitions; i++) {
1516 kernel_lb_addr uninitialized_var(ino);
1517 struct udf_part_map *map = &sbi->s_partmaps[i];
1518 switch (map->s_partition_type) {
1519 case UDF_VIRTUAL_MAP15:
1520 case UDF_VIRTUAL_MAP20:
1521 if (!sbi->s_last_block) {
1522 sbi->s_last_block = udf_get_last_block(sb);
1523 udf_find_anchor(sb);
1526 if (!sbi->s_last_block) {
1527 udf_debug("Unable to determine Lastblock (For "
1528 "Virtual Partition)\n");
1532 for (j = 0; j < sbi->s_partitions; j++) {
1533 struct udf_part_map *map2 = &sbi->s_partmaps[j];
1535 map->s_volumeseqnum ==
1536 map2->s_volumeseqnum &&
1537 map->s_partition_num ==
1538 map2->s_partition_num) {
1539 ino.partitionReferenceNum = j;
1540 ino.logicalBlockNum =
1542 map2->s_partition_root;
1547 if (j == sbi->s_partitions)
1550 sbi->s_vat_inode = udf_iget(sb, ino);
1551 if (!sbi->s_vat_inode)
1554 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1555 map->s_type_specific.s_virtual.s_start_offset =
1556 udf_ext0_offset(sbi->s_vat_inode);
1557 map->s_type_specific.s_virtual.s_num_entries =
1558 (sbi->s_vat_inode->i_size - 36) >> 2;
1559 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1561 struct virtualAllocationTable20 *vat20;
1563 pos = udf_block_map(sbi->s_vat_inode, 0);
1564 bh = sb_bread(sb, pos);
1567 vat20 = (struct virtualAllocationTable20 *)
1569 udf_ext0_offset(sbi->s_vat_inode);
1570 map->s_type_specific.s_virtual.s_start_offset =
1571 le16_to_cpu(vat20->lengthHeader) +
1572 udf_ext0_offset(sbi->s_vat_inode);
1573 map->s_type_specific.s_virtual.s_num_entries =
1574 (sbi->s_vat_inode->i_size -
1575 map->s_type_specific.s_virtual.
1576 s_start_offset) >> 2;
1579 map->s_partition_root = udf_get_pblock(sb, 0, i, 0);
1580 map->s_partition_len =
1581 sbi->s_partmaps[ino.partitionReferenceNum].
1588 static void udf_open_lvid(struct super_block *sb)
1590 struct udf_sb_info *sbi = UDF_SB(sb);
1591 struct buffer_head *bh = sbi->s_lvid_bh;
1593 struct logicalVolIntegrityDesc *lvid =
1594 (struct logicalVolIntegrityDesc *)bh->b_data;
1595 struct logicalVolIntegrityDescImpUse *lvidiu =
1598 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1599 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1600 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1602 lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN;
1604 lvid->descTag.descCRC = cpu_to_le16(
1605 udf_crc((char *)lvid + sizeof(tag),
1606 le16_to_cpu(lvid->descTag.descCRCLength),
1609 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1610 mark_buffer_dirty(bh);
1614 static void udf_close_lvid(struct super_block *sb)
1616 struct udf_sb_info *sbi = UDF_SB(sb);
1617 struct buffer_head *bh = sbi->s_lvid_bh;
1618 struct logicalVolIntegrityDesc *lvid;
1623 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1625 if (lvid->integrityType == LVID_INTEGRITY_TYPE_OPEN) {
1626 struct logicalVolIntegrityDescImpUse *lvidiu =
1628 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1629 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1630 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1632 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1633 lvidiu->maxUDFWriteRev =
1634 cpu_to_le16(UDF_MAX_WRITE_VERSION);
1635 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1636 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1637 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1638 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1639 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1641 lvid->descTag.descCRC = cpu_to_le16(
1642 udf_crc((char *)lvid + sizeof(tag),
1643 le16_to_cpu(lvid->descTag.descCRCLength),
1646 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1647 mark_buffer_dirty(bh);
1651 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1654 int nr_groups = bitmap->s_nr_groups;
1655 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1658 for (i = 0; i < nr_groups; i++)
1659 if (bitmap->s_block_bitmap[i])
1660 brelse(bitmap->s_block_bitmap[i]);
1662 if (size <= PAGE_SIZE)
1668 static int udf_fill_super(struct super_block *sb, void *options, int silent)
1671 struct inode *inode = NULL;
1672 struct udf_options uopt;
1673 kernel_lb_addr rootdir, fileset;
1674 struct udf_sb_info *sbi;
1676 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1681 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1685 sb->s_fs_info = sbi;
1687 mutex_init(&sbi->s_alloc_mutex);
1689 if (!udf_parse_options((char *)options, &uopt, false))
1692 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
1693 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1694 udf_error(sb, "udf_read_super",
1695 "utf8 cannot be combined with iocharset\n");
1698 #ifdef CONFIG_UDF_NLS
1699 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1700 uopt.nls_map = load_nls_default();
1702 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1704 udf_debug("Using default NLS map\n");
1707 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1708 uopt.flags |= (1 << UDF_FLAG_UTF8);
1710 fileset.logicalBlockNum = 0xFFFFFFFF;
1711 fileset.partitionReferenceNum = 0xFFFF;
1713 sbi->s_flags = uopt.flags;
1714 sbi->s_uid = uopt.uid;
1715 sbi->s_gid = uopt.gid;
1716 sbi->s_umask = uopt.umask;
1717 sbi->s_nls_map = uopt.nls_map;
1719 /* Set the block size for all transfers */
1720 if (!sb_min_blocksize(sb, uopt.blocksize)) {
1721 udf_debug("Bad block size (%d)\n", uopt.blocksize);
1722 printk(KERN_ERR "udf: bad block size (%d)\n", uopt.blocksize);
1726 if (uopt.session == 0xFFFFFFFF)
1727 sbi->s_session = udf_get_last_session(sb);
1729 sbi->s_session = uopt.session;
1731 udf_debug("Multi-session=%d\n", sbi->s_session);
1733 sbi->s_last_block = uopt.lastblock;
1734 sbi->s_anchor[0] = sbi->s_anchor[1] = 0;
1735 sbi->s_anchor[2] = uopt.anchor;
1736 sbi->s_anchor[3] = 256;
1738 if (udf_check_valid(sb, uopt.novrs, silent)) {
1739 /* read volume recognition sequences */
1740 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1744 udf_find_anchor(sb);
1746 /* Fill in the rest of the superblock */
1747 sb->s_op = &udf_sb_ops;
1750 sb->s_magic = UDF_SUPER_MAGIC;
1751 sb->s_time_gran = 1000;
1753 if (udf_load_partition(sb, &fileset)) {
1754 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
1758 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1760 if (sbi->s_lvid_bh) {
1761 struct logicalVolIntegrityDescImpUse *lvidiu =
1763 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1764 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
1765 /* uint16_t maxUDFWriteRev =
1766 le16_to_cpu(lvidiu->maxUDFWriteRev); */
1768 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
1769 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
1771 le16_to_cpu(lvidiu->minUDFReadRev),
1772 UDF_MAX_READ_VERSION);
1774 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
1775 sb->s_flags |= MS_RDONLY;
1777 sbi->s_udfrev = minUDFWriteRev;
1779 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
1780 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
1781 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
1782 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
1785 if (!sbi->s_partitions) {
1786 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
1790 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
1791 UDF_PART_FLAG_READ_ONLY) {
1792 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
1793 "forcing readonly mount\n");
1794 sb->s_flags |= MS_RDONLY;
1797 if (udf_find_fileset(sb, &fileset, &rootdir)) {
1798 printk(KERN_WARNING "UDF-fs: No fileset found\n");
1804 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
1805 udf_info("UDF: Mounting volume '%s', "
1806 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
1807 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
1808 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1810 if (!(sb->s_flags & MS_RDONLY))
1813 /* Assign the root inode */
1814 /* assign inodes by physical block number */
1815 /* perhaps it's not extensible enough, but for now ... */
1816 inode = udf_iget(sb, rootdir);
1818 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
1820 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
1824 /* Allocate a dentry for the root inode */
1825 sb->s_root = d_alloc_root(inode);
1827 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
1831 sb->s_maxbytes = MAX_LFS_FILESIZE;
1835 if (sbi->s_vat_inode)
1836 iput(sbi->s_vat_inode);
1837 if (sbi->s_partitions) {
1838 struct udf_part_map *map = &sbi->s_partmaps[sbi->s_partition];
1839 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1840 iput(map->s_uspace.s_table);
1841 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1842 iput(map->s_fspace.s_table);
1843 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1844 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1845 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1846 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1847 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1848 for (i = 0; i < 4; i++)
1849 brelse(map->s_type_specific.s_sparing.
1852 #ifdef CONFIG_UDF_NLS
1853 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
1854 unload_nls(sbi->s_nls_map);
1856 if (!(sb->s_flags & MS_RDONLY))
1858 brelse(sbi->s_lvid_bh);
1860 kfree(sbi->s_partmaps);
1862 sb->s_fs_info = NULL;
1867 static void udf_error(struct super_block *sb, const char *function,
1868 const char *fmt, ...)
1872 if (!(sb->s_flags & MS_RDONLY)) {
1876 va_start(args, fmt);
1877 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1879 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
1880 sb->s_id, function, error_buf);
1883 void udf_warning(struct super_block *sb, const char *function,
1884 const char *fmt, ...)
1888 va_start(args, fmt);
1889 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1891 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
1892 sb->s_id, function, error_buf);
1895 static void udf_put_super(struct super_block *sb)
1898 struct udf_sb_info *sbi;
1901 if (sbi->s_vat_inode)
1902 iput(sbi->s_vat_inode);
1903 if (sbi->s_partitions) {
1904 struct udf_part_map *map = &sbi->s_partmaps[sbi->s_partition];
1905 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1906 iput(map->s_uspace.s_table);
1907 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1908 iput(map->s_fspace.s_table);
1909 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1910 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1911 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1912 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1913 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1914 for (i = 0; i < 4; i++)
1915 brelse(map->s_type_specific.s_sparing.
1918 #ifdef CONFIG_UDF_NLS
1919 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
1920 unload_nls(sbi->s_nls_map);
1922 if (!(sb->s_flags & MS_RDONLY))
1924 brelse(sbi->s_lvid_bh);
1925 kfree(sbi->s_partmaps);
1926 kfree(sb->s_fs_info);
1927 sb->s_fs_info = NULL;
1930 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1932 struct super_block *sb = dentry->d_sb;
1933 struct udf_sb_info *sbi = UDF_SB(sb);
1934 struct logicalVolIntegrityDescImpUse *lvidiu;
1936 if (sbi->s_lvid_bh != NULL)
1937 lvidiu = udf_sb_lvidiu(sbi);
1941 buf->f_type = UDF_SUPER_MAGIC;
1942 buf->f_bsize = sb->s_blocksize;
1943 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1944 buf->f_bfree = udf_count_free(sb);
1945 buf->f_bavail = buf->f_bfree;
1946 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
1947 le32_to_cpu(lvidiu->numDirs)) : 0)
1949 buf->f_ffree = buf->f_bfree;
1950 /* __kernel_fsid_t f_fsid */
1951 buf->f_namelen = UDF_NAME_LEN - 2;
1956 static unsigned int udf_count_free_bitmap(struct super_block *sb,
1957 struct udf_bitmap *bitmap)
1959 struct buffer_head *bh = NULL;
1960 unsigned int accum = 0;
1962 int block = 0, newblock;
1967 struct spaceBitmapDesc *bm;
1971 loc.logicalBlockNum = bitmap->s_extPosition;
1972 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
1973 bh = udf_read_ptagged(sb, loc, 0, &ident);
1976 printk(KERN_ERR "udf: udf_count_free failed\n");
1978 } else if (ident != TAG_IDENT_SBD) {
1980 printk(KERN_ERR "udf: udf_count_free failed\n");
1984 bm = (struct spaceBitmapDesc *)bh->b_data;
1985 bytes = le32_to_cpu(bm->numOfBytes);
1986 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
1987 ptr = (uint8_t *)bh->b_data;
1990 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
1991 accum += bitmap_weight((const unsigned long *)(ptr + index),
1996 newblock = udf_get_lb_pblock(sb, loc, ++block);
1997 bh = udf_tread(sb, newblock);
1999 udf_debug("read failed\n");
2003 ptr = (uint8_t *)bh->b_data;
2014 static unsigned int udf_count_free_table(struct super_block *sb,
2015 struct inode *table)
2017 unsigned int accum = 0;
2019 kernel_lb_addr eloc;
2021 struct extent_position epos;
2025 epos.block = UDF_I(table)->i_location;
2026 epos.offset = sizeof(struct unallocSpaceEntry);
2029 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2030 accum += (elen >> table->i_sb->s_blocksize_bits);
2039 static unsigned int udf_count_free(struct super_block *sb)
2041 unsigned int accum = 0;
2042 struct udf_sb_info *sbi;
2043 struct udf_part_map *map;
2046 if (sbi->s_lvid_bh) {
2047 struct logicalVolIntegrityDesc *lvid =
2048 (struct logicalVolIntegrityDesc *)
2049 sbi->s_lvid_bh->b_data;
2050 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2051 accum = le32_to_cpu(
2052 lvid->freeSpaceTable[sbi->s_partition]);
2053 if (accum == 0xFFFFFFFF)
2061 map = &sbi->s_partmaps[sbi->s_partition];
2062 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2063 accum += udf_count_free_bitmap(sb,
2064 map->s_uspace.s_bitmap);
2066 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2067 accum += udf_count_free_bitmap(sb,
2068 map->s_fspace.s_bitmap);
2073 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2074 accum += udf_count_free_table(sb,
2075 map->s_uspace.s_table);
2077 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2078 accum += udf_count_free_table(sb,
2079 map->s_fspace.s_table);