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;
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)
684 * Find an anchor volume descriptor.
687 * sb Pointer to _locked_ superblock.
688 * lastblock Last block on media.
691 * <return> 1 if not found, 0 if ok
694 * July 1, 1997 - Andrew E. Mileski
695 * Written, tested, and released.
697 static void udf_find_anchor(struct super_block *sb)
700 struct buffer_head *bh = NULL;
704 struct udf_sb_info *sbi;
707 lastblock = sbi->s_last_block;
710 int varlastblock = udf_variable_to_fixed(lastblock);
711 int last[] = { lastblock, lastblock - 2,
712 lastblock - 150, lastblock - 152,
713 varlastblock, varlastblock - 2,
714 varlastblock - 150, varlastblock - 152 };
718 /* Search for an anchor volume descriptor pointer */
720 /* according to spec, anchor is in either:
724 * however, if the disc isn't closed, it could be 512 */
726 for (i = 0; !lastblock && i < ARRAY_SIZE(last); i++) {
727 ident = location = 0;
729 bh = sb_bread(sb, last[i]);
731 tag *t = (tag *)bh->b_data;
732 ident = le16_to_cpu(t->tagIdent);
733 location = le32_to_cpu(t->tagLocation);
738 if (ident == TAG_IDENT_AVDP) {
739 if (location == last[i] - sbi->s_session) {
740 lastblock = last[i] - sbi->s_session;
741 sbi->s_anchor[0] = lastblock;
742 sbi->s_anchor[1] = lastblock - 256;
743 } else if (location ==
744 udf_variable_to_fixed(last[i]) -
746 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
748 udf_variable_to_fixed(last[i]) -
750 sbi->s_anchor[0] = lastblock;
751 sbi->s_anchor[1] = lastblock - 256 -
754 udf_debug("Anchor found at block %d, "
755 "location mismatch %d.\n",
758 } else if (ident == TAG_IDENT_FE ||
759 ident == TAG_IDENT_EFE) {
761 sbi->s_anchor[3] = 512;
763 ident = location = 0;
764 if (last[i] >= 256) {
765 bh = sb_bread(sb, last[i] - 256);
767 tag *t = (tag *)bh->b_data;
770 location = le32_to_cpu(
776 if (ident == TAG_IDENT_AVDP &&
777 location == last[i] - 256 -
780 sbi->s_anchor[1] = last[i] - 256;
782 ident = location = 0;
783 if (last[i] >= 312 + sbi->s_session) {
792 location = le32_to_cpu(
798 if (ident == TAG_IDENT_AVDP &&
799 location == udf_variable_to_fixed(last[i]) - 256) {
802 lastblock = udf_variable_to_fixed(last[i]);
803 sbi->s_anchor[1] = lastblock - 256;
811 /* We haven't found the lastblock. check 312 */
812 bh = sb_bread(sb, 312 + sbi->s_session);
814 tag *t = (tag *)bh->b_data;
815 ident = le16_to_cpu(t->tagIdent);
816 location = le32_to_cpu(t->tagLocation);
819 if (ident == TAG_IDENT_AVDP && location == 256)
820 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
824 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
825 if (!sbi->s_anchor[i])
827 bh = udf_read_tagged(sb, sbi->s_anchor[i],
828 sbi->s_anchor[i], &ident);
830 sbi->s_anchor[i] = 0;
833 if ((ident != TAG_IDENT_AVDP) &&
834 (i || (ident != TAG_IDENT_FE &&
835 ident != TAG_IDENT_EFE)))
836 sbi->s_anchor[i] = 0;
840 sbi->s_last_block = lastblock;
843 static int udf_find_fileset(struct super_block *sb,
844 kernel_lb_addr *fileset,
845 kernel_lb_addr *root)
847 struct buffer_head *bh = NULL;
850 struct udf_sb_info *sbi;
852 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
853 fileset->partitionReferenceNum != 0xFFFF) {
854 bh = udf_read_ptagged(sb, *fileset, 0, &ident);
858 } else if (ident != TAG_IDENT_FSD) {
867 /* Search backwards through the partitions */
868 kernel_lb_addr newfileset;
870 /* --> cvg: FIXME - is it reasonable? */
873 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
874 (newfileset.partitionReferenceNum != 0xFFFF &&
875 fileset->logicalBlockNum == 0xFFFFFFFF &&
876 fileset->partitionReferenceNum == 0xFFFF);
877 newfileset.partitionReferenceNum--) {
878 lastblock = sbi->s_partmaps
879 [newfileset.partitionReferenceNum]
881 newfileset.logicalBlockNum = 0;
884 bh = udf_read_ptagged(sb, newfileset, 0,
887 newfileset.logicalBlockNum++;
894 struct spaceBitmapDesc *sp;
895 sp = (struct spaceBitmapDesc *)
897 newfileset.logicalBlockNum += 1 +
898 ((le32_to_cpu(sp->numOfBytes) +
899 sizeof(struct spaceBitmapDesc)
900 - 1) >> sb->s_blocksize_bits);
905 *fileset = newfileset;
908 newfileset.logicalBlockNum++;
913 } while (newfileset.logicalBlockNum < lastblock &&
914 fileset->logicalBlockNum == 0xFFFFFFFF &&
915 fileset->partitionReferenceNum == 0xFFFF);
919 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
920 fileset->partitionReferenceNum != 0xFFFF) && bh) {
921 udf_debug("Fileset at block=%d, partition=%d\n",
922 fileset->logicalBlockNum,
923 fileset->partitionReferenceNum);
925 sbi->s_partition = fileset->partitionReferenceNum;
926 udf_load_fileset(sb, bh, root);
933 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
935 struct primaryVolDesc *pvoldesc;
938 struct buffer_head *bh;
941 bh = udf_read_tagged(sb, block, block, &ident);
944 BUG_ON(ident != TAG_IDENT_PVD);
946 pvoldesc = (struct primaryVolDesc *)bh->b_data;
948 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
949 pvoldesc->recordingDateAndTime)) {
951 timestamp *ts = &pvoldesc->recordingDateAndTime;
952 udf_debug("recording time %04u/%02u/%02u"
954 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
955 ts->minute, le16_to_cpu(ts->typeAndTimezone));
959 if (!udf_build_ustr(&instr, pvoldesc->volIdent, 32))
960 if (udf_CS0toUTF8(&outstr, &instr)) {
961 strncpy(UDF_SB(sb)->s_volume_ident, outstr.u_name,
962 outstr.u_len > 31 ? 31 : outstr.u_len);
963 udf_debug("volIdent[] = '%s'\n",
964 UDF_SB(sb)->s_volume_ident);
967 if (!udf_build_ustr(&instr, pvoldesc->volSetIdent, 128))
968 if (udf_CS0toUTF8(&outstr, &instr))
969 udf_debug("volSetIdent[] = '%s'\n", outstr.u_name);
975 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
976 kernel_lb_addr *root)
978 struct fileSetDesc *fset;
980 fset = (struct fileSetDesc *)bh->b_data;
982 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
984 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
986 udf_debug("Rootdir at block=%d, partition=%d\n",
987 root->logicalBlockNum, root->partitionReferenceNum);
990 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
992 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
993 return DIV_ROUND_UP(map->s_partition_len +
994 (sizeof(struct spaceBitmapDesc) << 3),
995 sb->s_blocksize * 8);
998 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1000 struct udf_bitmap *bitmap;
1004 nr_groups = udf_compute_nr_groups(sb, index);
1005 size = sizeof(struct udf_bitmap) +
1006 (sizeof(struct buffer_head *) * nr_groups);
1008 if (size <= PAGE_SIZE)
1009 bitmap = kmalloc(size, GFP_KERNEL);
1011 bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
1013 if (bitmap == NULL) {
1014 udf_error(sb, __FUNCTION__,
1015 "Unable to allocate space for bitmap "
1016 "and %d buffer_head pointers", nr_groups);
1020 memset(bitmap, 0x00, size);
1021 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
1022 bitmap->s_nr_groups = nr_groups;
1026 static int udf_fill_partdesc_info(struct super_block *sb,
1027 struct partitionDesc *p, int p_index)
1029 struct udf_part_map *map;
1030 struct udf_sb_info *sbi = UDF_SB(sb);
1031 struct partitionHeaderDesc *phd;
1033 map = &sbi->s_partmaps[p_index];
1035 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1036 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1038 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1039 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1040 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1041 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1042 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1043 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1044 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1045 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1047 udf_debug("Partition (%d:%d type %x) starts at physical %d, "
1048 "block length %d\n", partitionNumber, p_index,
1049 map->s_partition_type, map->s_partition_root,
1050 map->s_partition_len);
1052 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1053 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1056 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1057 if (phd->unallocSpaceTable.extLength) {
1058 kernel_lb_addr loc = {
1059 .logicalBlockNum = le32_to_cpu(
1060 phd->unallocSpaceTable.extPosition),
1061 .partitionReferenceNum = p_index,
1064 map->s_uspace.s_table = udf_iget(sb, loc);
1065 if (!map->s_uspace.s_table) {
1066 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1070 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1071 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1072 p_index, map->s_uspace.s_table->i_ino);
1075 if (phd->unallocSpaceBitmap.extLength) {
1076 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1079 map->s_uspace.s_bitmap = bitmap;
1080 bitmap->s_extLength = le32_to_cpu(
1081 phd->unallocSpaceBitmap.extLength);
1082 bitmap->s_extPosition = le32_to_cpu(
1083 phd->unallocSpaceBitmap.extPosition);
1084 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1085 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
1086 bitmap->s_extPosition);
1089 if (phd->partitionIntegrityTable.extLength)
1090 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1092 if (phd->freedSpaceTable.extLength) {
1093 kernel_lb_addr loc = {
1094 .logicalBlockNum = le32_to_cpu(
1095 phd->freedSpaceTable.extPosition),
1096 .partitionReferenceNum = p_index,
1099 map->s_fspace.s_table = udf_iget(sb, loc);
1100 if (!map->s_fspace.s_table) {
1101 udf_debug("cannot load freedSpaceTable (part %d)\n",
1106 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1107 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1108 p_index, map->s_fspace.s_table->i_ino);
1111 if (phd->freedSpaceBitmap.extLength) {
1112 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1115 map->s_fspace.s_bitmap = bitmap;
1116 bitmap->s_extLength = le32_to_cpu(
1117 phd->freedSpaceBitmap.extLength);
1118 bitmap->s_extPosition = le32_to_cpu(
1119 phd->freedSpaceBitmap.extPosition);
1120 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1121 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
1122 bitmap->s_extPosition);
1127 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1129 struct udf_sb_info *sbi = UDF_SB(sb);
1130 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1132 struct buffer_head *bh;
1134 /* VAT file entry is in the last recorded block */
1135 ino.partitionReferenceNum = type1_index;
1136 ino.logicalBlockNum = sbi->s_last_block - map->s_partition_root;
1137 sbi->s_vat_inode = udf_iget(sb, ino);
1138 if (!sbi->s_vat_inode)
1141 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1142 map->s_type_specific.s_virtual.s_start_offset =
1143 udf_ext0_offset(sbi->s_vat_inode);
1144 map->s_type_specific.s_virtual.s_num_entries =
1145 (sbi->s_vat_inode->i_size - 36) >> 2;
1146 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1148 struct virtualAllocationTable20 *vat20;
1150 pos = udf_block_map(sbi->s_vat_inode, 0);
1151 bh = sb_bread(sb, pos);
1154 vat20 = (struct virtualAllocationTable20 *)bh->b_data +
1155 udf_ext0_offset(sbi->s_vat_inode);
1156 map->s_type_specific.s_virtual.s_start_offset =
1157 le16_to_cpu(vat20->lengthHeader) +
1158 udf_ext0_offset(sbi->s_vat_inode);
1159 map->s_type_specific.s_virtual.s_num_entries =
1160 (sbi->s_vat_inode->i_size -
1161 map->s_type_specific.s_virtual.
1162 s_start_offset) >> 2;
1168 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1170 struct buffer_head *bh;
1171 struct partitionDesc *p;
1172 struct udf_part_map *map;
1173 struct udf_sb_info *sbi = UDF_SB(sb);
1175 uint16_t partitionNumber;
1179 bh = udf_read_tagged(sb, block, block, &ident);
1182 if (ident != TAG_IDENT_PD)
1185 p = (struct partitionDesc *)bh->b_data;
1186 partitionNumber = le16_to_cpu(p->partitionNumber);
1188 /* First scan for TYPE1 and SPARABLE partitions */
1189 for (i = 0; i < sbi->s_partitions; i++) {
1190 map = &sbi->s_partmaps[i];
1191 udf_debug("Searching map: (%d == %d)\n",
1192 map->s_partition_num, partitionNumber);
1193 if (map->s_partition_num == partitionNumber &&
1194 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1195 map->s_partition_type == UDF_SPARABLE_MAP15))
1199 if (i >= sbi->s_partitions) {
1200 udf_debug("Partition (%d) not found in partition map\n",
1205 ret = udf_fill_partdesc_info(sb, p, i);
1208 * Now rescan for VIRTUAL partitions when TYPE1 partitions are
1212 for (i = 0; i < sbi->s_partitions; i++) {
1213 map = &sbi->s_partmaps[i];
1215 if (map->s_partition_num == partitionNumber &&
1216 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1217 map->s_partition_type == UDF_VIRTUAL_MAP20))
1221 if (i >= sbi->s_partitions)
1224 ret = udf_fill_partdesc_info(sb, p, i);
1228 if (!sbi->s_last_block) {
1229 sbi->s_last_block = udf_get_last_block(sb);
1230 udf_find_anchor(sb);
1231 if (!sbi->s_last_block) {
1232 udf_debug("Unable to determine Lastblock (For "
1233 "Virtual Partition)\n");
1239 ret = udf_load_vat(sb, i, type1_idx);
1241 /* In case loading failed, we handle cleanup in udf_fill_super */
1246 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1247 kernel_lb_addr *fileset)
1249 struct logicalVolDesc *lvd;
1252 struct udf_sb_info *sbi = UDF_SB(sb);
1253 struct genericPartitionMap *gpm;
1255 struct buffer_head *bh;
1258 bh = udf_read_tagged(sb, block, block, &ident);
1261 BUG_ON(ident != TAG_IDENT_LVD);
1262 lvd = (struct logicalVolDesc *)bh->b_data;
1264 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1270 for (i = 0, offset = 0;
1271 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
1272 i++, offset += gpm->partitionMapLength) {
1273 struct udf_part_map *map = &sbi->s_partmaps[i];
1274 gpm = (struct genericPartitionMap *)
1275 &(lvd->partitionMaps[offset]);
1276 type = gpm->partitionMapType;
1278 struct genericPartitionMap1 *gpm1 =
1279 (struct genericPartitionMap1 *)gpm;
1280 map->s_partition_type = UDF_TYPE1_MAP15;
1281 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1282 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1283 map->s_partition_func = NULL;
1284 } else if (type == 2) {
1285 struct udfPartitionMap2 *upm2 =
1286 (struct udfPartitionMap2 *)gpm;
1287 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1288 strlen(UDF_ID_VIRTUAL))) {
1290 le16_to_cpu(((__le16 *)upm2->partIdent.
1292 if (suf == 0x0150) {
1293 map->s_partition_type =
1295 map->s_partition_func =
1296 udf_get_pblock_virt15;
1297 } else if (suf == 0x0200) {
1298 map->s_partition_type =
1300 map->s_partition_func =
1301 udf_get_pblock_virt20;
1303 } else if (!strncmp(upm2->partIdent.ident,
1305 strlen(UDF_ID_SPARABLE))) {
1307 struct sparingTable *st;
1308 struct sparablePartitionMap *spm =
1309 (struct sparablePartitionMap *)gpm;
1311 map->s_partition_type = UDF_SPARABLE_MAP15;
1312 map->s_type_specific.s_sparing.s_packet_len =
1313 le16_to_cpu(spm->packetLength);
1314 for (j = 0; j < spm->numSparingTables; j++) {
1315 struct buffer_head *bh2;
1318 spm->locSparingTable[j]);
1319 bh2 = udf_read_tagged(sb, loc, loc,
1321 map->s_type_specific.s_sparing.
1322 s_spar_map[j] = bh2;
1327 st = (struct sparingTable *)bh2->b_data;
1328 if (ident != 0 || strncmp(
1329 st->sparingIdent.ident,
1331 strlen(UDF_ID_SPARING))) {
1333 map->s_type_specific.s_sparing.
1334 s_spar_map[j] = NULL;
1337 map->s_partition_func = udf_get_pblock_spar15;
1339 udf_debug("Unknown ident: %s\n",
1340 upm2->partIdent.ident);
1343 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1344 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1346 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1347 i, map->s_partition_num, type,
1348 map->s_volumeseqnum);
1352 long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]);
1354 *fileset = lelb_to_cpu(la->extLocation);
1355 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1356 "partition=%d\n", fileset->logicalBlockNum,
1357 fileset->partitionReferenceNum);
1359 if (lvd->integritySeqExt.extLength)
1360 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1368 * udf_load_logicalvolint
1371 static void udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc)
1373 struct buffer_head *bh = NULL;
1375 struct udf_sb_info *sbi = UDF_SB(sb);
1376 struct logicalVolIntegrityDesc *lvid;
1378 while (loc.extLength > 0 &&
1379 (bh = udf_read_tagged(sb, loc.extLocation,
1380 loc.extLocation, &ident)) &&
1381 ident == TAG_IDENT_LVID) {
1382 sbi->s_lvid_bh = bh;
1383 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1385 if (lvid->nextIntegrityExt.extLength)
1386 udf_load_logicalvolint(sb,
1387 leea_to_cpu(lvid->nextIntegrityExt));
1389 if (sbi->s_lvid_bh != bh)
1391 loc.extLength -= sb->s_blocksize;
1394 if (sbi->s_lvid_bh != bh)
1399 * udf_process_sequence
1402 * Process a main/reserve volume descriptor sequence.
1405 * sb Pointer to _locked_ superblock.
1406 * block First block of first extent of the sequence.
1407 * lastblock Lastblock of first extent of the sequence.
1410 * July 1, 1997 - Andrew E. Mileski
1411 * Written, tested, and released.
1413 static noinline int udf_process_sequence(struct super_block *sb, long block,
1414 long lastblock, kernel_lb_addr *fileset)
1416 struct buffer_head *bh = NULL;
1417 struct udf_vds_record vds[VDS_POS_LENGTH];
1418 struct udf_vds_record *curr;
1419 struct generic_desc *gd;
1420 struct volDescPtr *vdp;
1424 long next_s = 0, next_e = 0;
1426 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1429 * Read the main descriptor sequence and find which descriptors
1432 for (; (!done && block <= lastblock); block++) {
1434 bh = udf_read_tagged(sb, block, block, &ident);
1436 printk(KERN_ERR "udf: Block %Lu of volume descriptor "
1437 "sequence is corrupted or we could not read "
1438 "it.\n", (unsigned long long)block);
1442 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1443 gd = (struct generic_desc *)bh->b_data;
1444 vdsn = le32_to_cpu(gd->volDescSeqNum);
1446 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1447 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1448 if (vdsn >= curr->volDescSeqNum) {
1449 curr->volDescSeqNum = vdsn;
1450 curr->block = block;
1453 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1454 curr = &vds[VDS_POS_VOL_DESC_PTR];
1455 if (vdsn >= curr->volDescSeqNum) {
1456 curr->volDescSeqNum = vdsn;
1457 curr->block = block;
1459 vdp = (struct volDescPtr *)bh->b_data;
1460 next_s = le32_to_cpu(
1461 vdp->nextVolDescSeqExt.extLocation);
1462 next_e = le32_to_cpu(
1463 vdp->nextVolDescSeqExt.extLength);
1464 next_e = next_e >> sb->s_blocksize_bits;
1468 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1469 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1470 if (vdsn >= curr->volDescSeqNum) {
1471 curr->volDescSeqNum = vdsn;
1472 curr->block = block;
1475 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1476 curr = &vds[VDS_POS_PARTITION_DESC];
1478 curr->block = block;
1480 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1481 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1482 if (vdsn >= curr->volDescSeqNum) {
1483 curr->volDescSeqNum = vdsn;
1484 curr->block = block;
1487 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1488 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1489 if (vdsn >= curr->volDescSeqNum) {
1490 curr->volDescSeqNum = vdsn;
1491 curr->block = block;
1494 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1495 vds[VDS_POS_TERMINATING_DESC].block = block;
1499 next_s = next_e = 0;
1507 * Now read interesting descriptors again and process them
1508 * in a suitable order
1510 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1511 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n");
1514 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1517 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1518 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1521 if (vds[VDS_POS_PARTITION_DESC].block) {
1523 * We rescan the whole descriptor sequence to find
1524 * partition descriptor blocks and process them.
1526 for (block = vds[VDS_POS_PARTITION_DESC].block;
1527 block < vds[VDS_POS_TERMINATING_DESC].block;
1529 if (udf_load_partdesc(sb, block))
1539 static int udf_check_valid(struct super_block *sb, int novrs, int silent)
1542 struct udf_sb_info *sbi = UDF_SB(sb);
1545 udf_debug("Validity check skipped because of novrs option\n");
1548 /* Check that it is NSR02 compliant */
1549 /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
1550 block = udf_vrs(sb, silent);
1552 udf_debug("Failed to read byte 32768. Assuming open "
1553 "disc. Skipping validity check\n");
1554 if (block && !sbi->s_last_block)
1555 sbi->s_last_block = udf_get_last_block(sb);
1559 static int udf_load_sequence(struct super_block *sb, kernel_lb_addr *fileset)
1561 struct anchorVolDescPtr *anchor;
1563 struct buffer_head *bh;
1564 long main_s, main_e, reserve_s, reserve_e;
1566 struct udf_sb_info *sbi;
1572 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
1573 if (!sbi->s_anchor[i])
1576 bh = udf_read_tagged(sb, sbi->s_anchor[i], sbi->s_anchor[i],
1581 anchor = (struct anchorVolDescPtr *)bh->b_data;
1583 /* Locate the main sequence */
1584 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1585 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1586 main_e = main_e >> sb->s_blocksize_bits;
1589 /* Locate the reserve sequence */
1590 reserve_s = le32_to_cpu(
1591 anchor->reserveVolDescSeqExt.extLocation);
1592 reserve_e = le32_to_cpu(
1593 anchor->reserveVolDescSeqExt.extLength);
1594 reserve_e = reserve_e >> sb->s_blocksize_bits;
1595 reserve_e += reserve_s;
1599 /* Process the main & reserve sequences */
1600 /* responsible for finding the PartitionDesc(s) */
1601 if (!(udf_process_sequence(sb, main_s, main_e,
1603 udf_process_sequence(sb, reserve_s, reserve_e,
1608 if (i == ARRAY_SIZE(sbi->s_anchor)) {
1609 udf_debug("No Anchor block found\n");
1612 udf_debug("Using anchor in block %d\n", sbi->s_anchor[i]);
1617 static void udf_open_lvid(struct super_block *sb)
1619 struct udf_sb_info *sbi = UDF_SB(sb);
1620 struct buffer_head *bh = sbi->s_lvid_bh;
1621 struct logicalVolIntegrityDesc *lvid;
1622 struct logicalVolIntegrityDescImpUse *lvidiu;
1626 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1627 lvidiu = udf_sb_lvidiu(sbi);
1629 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1630 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1631 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1633 lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN;
1635 lvid->descTag.descCRC = cpu_to_le16(
1636 udf_crc((char *)lvid + sizeof(tag),
1637 le16_to_cpu(lvid->descTag.descCRCLength), 0));
1639 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1640 mark_buffer_dirty(bh);
1643 static void udf_close_lvid(struct super_block *sb)
1645 struct udf_sb_info *sbi = UDF_SB(sb);
1646 struct buffer_head *bh = sbi->s_lvid_bh;
1647 struct logicalVolIntegrityDesc *lvid;
1648 struct logicalVolIntegrityDescImpUse *lvidiu;
1653 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1655 if (lvid->integrityType != LVID_INTEGRITY_TYPE_OPEN)
1658 lvidiu = udf_sb_lvidiu(sbi);
1659 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1660 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1661 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1662 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1663 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1664 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1665 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1666 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1667 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1668 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1670 lvid->descTag.descCRC = cpu_to_le16(
1671 udf_crc((char *)lvid + sizeof(tag),
1672 le16_to_cpu(lvid->descTag.descCRCLength),
1675 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1676 mark_buffer_dirty(bh);
1679 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1682 int nr_groups = bitmap->s_nr_groups;
1683 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1686 for (i = 0; i < nr_groups; i++)
1687 if (bitmap->s_block_bitmap[i])
1688 brelse(bitmap->s_block_bitmap[i]);
1690 if (size <= PAGE_SIZE)
1696 static void udf_free_partition(struct udf_part_map *map)
1700 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1701 iput(map->s_uspace.s_table);
1702 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1703 iput(map->s_fspace.s_table);
1704 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1705 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1706 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1707 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1708 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1709 for (i = 0; i < 4; i++)
1710 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
1713 static int udf_fill_super(struct super_block *sb, void *options, int silent)
1716 struct inode *inode = NULL;
1717 struct udf_options uopt;
1718 kernel_lb_addr rootdir, fileset;
1719 struct udf_sb_info *sbi;
1721 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1726 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1730 sb->s_fs_info = sbi;
1732 mutex_init(&sbi->s_alloc_mutex);
1734 if (!udf_parse_options((char *)options, &uopt, false))
1737 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
1738 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1739 udf_error(sb, "udf_read_super",
1740 "utf8 cannot be combined with iocharset\n");
1743 #ifdef CONFIG_UDF_NLS
1744 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1745 uopt.nls_map = load_nls_default();
1747 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1749 udf_debug("Using default NLS map\n");
1752 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1753 uopt.flags |= (1 << UDF_FLAG_UTF8);
1755 fileset.logicalBlockNum = 0xFFFFFFFF;
1756 fileset.partitionReferenceNum = 0xFFFF;
1758 sbi->s_flags = uopt.flags;
1759 sbi->s_uid = uopt.uid;
1760 sbi->s_gid = uopt.gid;
1761 sbi->s_umask = uopt.umask;
1762 sbi->s_nls_map = uopt.nls_map;
1764 /* Set the block size for all transfers */
1765 if (!sb_min_blocksize(sb, uopt.blocksize)) {
1766 udf_debug("Bad block size (%d)\n", uopt.blocksize);
1767 printk(KERN_ERR "udf: bad block size (%d)\n", uopt.blocksize);
1771 if (uopt.session == 0xFFFFFFFF)
1772 sbi->s_session = udf_get_last_session(sb);
1774 sbi->s_session = uopt.session;
1776 udf_debug("Multi-session=%d\n", sbi->s_session);
1778 sbi->s_last_block = uopt.lastblock;
1779 sbi->s_anchor[0] = sbi->s_anchor[1] = 0;
1780 sbi->s_anchor[2] = uopt.anchor;
1781 sbi->s_anchor[3] = 256;
1783 if (udf_check_valid(sb, uopt.novrs, silent)) {
1784 /* read volume recognition sequences */
1785 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1789 udf_find_anchor(sb);
1791 /* Fill in the rest of the superblock */
1792 sb->s_op = &udf_sb_ops;
1795 sb->s_magic = UDF_SUPER_MAGIC;
1796 sb->s_time_gran = 1000;
1798 if (udf_load_sequence(sb, &fileset)) {
1799 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
1803 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1805 if (sbi->s_lvid_bh) {
1806 struct logicalVolIntegrityDescImpUse *lvidiu =
1808 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1809 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
1810 /* uint16_t maxUDFWriteRev =
1811 le16_to_cpu(lvidiu->maxUDFWriteRev); */
1813 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
1814 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
1816 le16_to_cpu(lvidiu->minUDFReadRev),
1817 UDF_MAX_READ_VERSION);
1819 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
1820 sb->s_flags |= MS_RDONLY;
1822 sbi->s_udfrev = minUDFWriteRev;
1824 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
1825 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
1826 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
1827 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
1830 if (!sbi->s_partitions) {
1831 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
1835 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
1836 UDF_PART_FLAG_READ_ONLY) {
1837 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
1838 "forcing readonly mount\n");
1839 sb->s_flags |= MS_RDONLY;
1842 if (udf_find_fileset(sb, &fileset, &rootdir)) {
1843 printk(KERN_WARNING "UDF-fs: No fileset found\n");
1849 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
1850 udf_info("UDF: Mounting volume '%s', "
1851 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
1852 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
1853 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
1855 if (!(sb->s_flags & MS_RDONLY))
1858 /* Assign the root inode */
1859 /* assign inodes by physical block number */
1860 /* perhaps it's not extensible enough, but for now ... */
1861 inode = udf_iget(sb, rootdir);
1863 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
1865 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
1869 /* Allocate a dentry for the root inode */
1870 sb->s_root = d_alloc_root(inode);
1872 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
1876 sb->s_maxbytes = MAX_LFS_FILESIZE;
1880 if (sbi->s_vat_inode)
1881 iput(sbi->s_vat_inode);
1882 if (sbi->s_partitions)
1883 for (i = 0; i < sbi->s_partitions; i++)
1884 udf_free_partition(&sbi->s_partmaps[i]);
1885 #ifdef CONFIG_UDF_NLS
1886 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
1887 unload_nls(sbi->s_nls_map);
1889 if (!(sb->s_flags & MS_RDONLY))
1891 brelse(sbi->s_lvid_bh);
1893 kfree(sbi->s_partmaps);
1895 sb->s_fs_info = NULL;
1900 static void udf_error(struct super_block *sb, const char *function,
1901 const char *fmt, ...)
1905 if (!(sb->s_flags & MS_RDONLY)) {
1909 va_start(args, fmt);
1910 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1912 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
1913 sb->s_id, function, error_buf);
1916 void udf_warning(struct super_block *sb, const char *function,
1917 const char *fmt, ...)
1921 va_start(args, fmt);
1922 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1924 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
1925 sb->s_id, function, error_buf);
1928 static void udf_put_super(struct super_block *sb)
1931 struct udf_sb_info *sbi;
1934 if (sbi->s_vat_inode)
1935 iput(sbi->s_vat_inode);
1936 if (sbi->s_partitions)
1937 for (i = 0; i < sbi->s_partitions; i++)
1938 udf_free_partition(&sbi->s_partmaps[i]);
1939 #ifdef CONFIG_UDF_NLS
1940 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
1941 unload_nls(sbi->s_nls_map);
1943 if (!(sb->s_flags & MS_RDONLY))
1945 brelse(sbi->s_lvid_bh);
1946 kfree(sbi->s_partmaps);
1947 kfree(sb->s_fs_info);
1948 sb->s_fs_info = NULL;
1951 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1953 struct super_block *sb = dentry->d_sb;
1954 struct udf_sb_info *sbi = UDF_SB(sb);
1955 struct logicalVolIntegrityDescImpUse *lvidiu;
1957 if (sbi->s_lvid_bh != NULL)
1958 lvidiu = udf_sb_lvidiu(sbi);
1962 buf->f_type = UDF_SUPER_MAGIC;
1963 buf->f_bsize = sb->s_blocksize;
1964 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1965 buf->f_bfree = udf_count_free(sb);
1966 buf->f_bavail = buf->f_bfree;
1967 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
1968 le32_to_cpu(lvidiu->numDirs)) : 0)
1970 buf->f_ffree = buf->f_bfree;
1971 /* __kernel_fsid_t f_fsid */
1972 buf->f_namelen = UDF_NAME_LEN - 2;
1977 static unsigned int udf_count_free_bitmap(struct super_block *sb,
1978 struct udf_bitmap *bitmap)
1980 struct buffer_head *bh = NULL;
1981 unsigned int accum = 0;
1983 int block = 0, newblock;
1988 struct spaceBitmapDesc *bm;
1992 loc.logicalBlockNum = bitmap->s_extPosition;
1993 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
1994 bh = udf_read_ptagged(sb, loc, 0, &ident);
1997 printk(KERN_ERR "udf: udf_count_free failed\n");
1999 } else if (ident != TAG_IDENT_SBD) {
2001 printk(KERN_ERR "udf: udf_count_free failed\n");
2005 bm = (struct spaceBitmapDesc *)bh->b_data;
2006 bytes = le32_to_cpu(bm->numOfBytes);
2007 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2008 ptr = (uint8_t *)bh->b_data;
2011 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2012 accum += bitmap_weight((const unsigned long *)(ptr + index),
2017 newblock = udf_get_lb_pblock(sb, loc, ++block);
2018 bh = udf_tread(sb, newblock);
2020 udf_debug("read failed\n");
2024 ptr = (uint8_t *)bh->b_data;
2035 static unsigned int udf_count_free_table(struct super_block *sb,
2036 struct inode *table)
2038 unsigned int accum = 0;
2040 kernel_lb_addr eloc;
2042 struct extent_position epos;
2046 epos.block = UDF_I(table)->i_location;
2047 epos.offset = sizeof(struct unallocSpaceEntry);
2050 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2051 accum += (elen >> table->i_sb->s_blocksize_bits);
2060 static unsigned int udf_count_free(struct super_block *sb)
2062 unsigned int accum = 0;
2063 struct udf_sb_info *sbi;
2064 struct udf_part_map *map;
2067 if (sbi->s_lvid_bh) {
2068 struct logicalVolIntegrityDesc *lvid =
2069 (struct logicalVolIntegrityDesc *)
2070 sbi->s_lvid_bh->b_data;
2071 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2072 accum = le32_to_cpu(
2073 lvid->freeSpaceTable[sbi->s_partition]);
2074 if (accum == 0xFFFFFFFF)
2082 map = &sbi->s_partmaps[sbi->s_partition];
2083 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2084 accum += udf_count_free_bitmap(sb,
2085 map->s_uspace.s_bitmap);
2087 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2088 accum += udf_count_free_bitmap(sb,
2089 map->s_fspace.s_bitmap);
2094 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2095 accum += udf_count_free_table(sb,
2096 map->s_uspace.s_table);
2098 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2099 accum += udf_count_free_table(sb,
2100 map->s_fspace.s_table);