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 <asm/byteorder.h>
58 #include <linux/udf_fs.h>
62 #include <linux/init.h>
63 #include <asm/uaccess.h>
65 #define VDS_POS_PRIMARY_VOL_DESC 0
66 #define VDS_POS_UNALLOC_SPACE_DESC 1
67 #define VDS_POS_LOGICAL_VOL_DESC 2
68 #define VDS_POS_PARTITION_DESC 3
69 #define VDS_POS_IMP_USE_VOL_DESC 4
70 #define VDS_POS_VOL_DESC_PTR 5
71 #define VDS_POS_TERMINATING_DESC 6
72 #define VDS_POS_LENGTH 7
74 static char error_buf[1024];
76 /* These are the "meat" - everything else is stuffing */
77 static int udf_fill_super(struct super_block *, void *, int);
78 static void udf_put_super(struct super_block *);
79 static void udf_write_super(struct super_block *);
80 static int udf_remount_fs(struct super_block *, int *, char *);
81 static int udf_check_valid(struct super_block *, int, int);
82 static int udf_vrs(struct super_block *sb, int silent);
83 static int udf_load_partition(struct super_block *, kernel_lb_addr *);
84 static int udf_load_logicalvol(struct super_block *, struct buffer_head *,
86 static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad);
87 static void udf_find_anchor(struct super_block *);
88 static int udf_find_fileset(struct super_block *, kernel_lb_addr *,
90 static void udf_load_pvoldesc(struct super_block *, struct buffer_head *);
91 static void udf_load_fileset(struct super_block *, struct buffer_head *,
93 static int udf_load_partdesc(struct super_block *, struct buffer_head *);
94 static void udf_open_lvid(struct super_block *);
95 static void udf_close_lvid(struct super_block *);
96 static unsigned int udf_count_free(struct super_block *);
97 static int udf_statfs(struct dentry *, struct kstatfs *);
99 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
101 struct logicalVolIntegrityDesc *lvid = (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
102 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
103 __u32 offset = number_of_partitions * 2 * sizeof(uint32_t)/sizeof(uint8_t);
104 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
107 /* UDF filesystem type */
108 static int udf_get_sb(struct file_system_type *fs_type,
109 int flags, const char *dev_name, void *data,
110 struct vfsmount *mnt)
112 return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt);
115 static struct file_system_type udf_fstype = {
116 .owner = THIS_MODULE,
118 .get_sb = udf_get_sb,
119 .kill_sb = kill_block_super,
120 .fs_flags = FS_REQUIRES_DEV,
123 static struct kmem_cache *udf_inode_cachep;
125 static struct inode *udf_alloc_inode(struct super_block *sb)
127 struct udf_inode_info *ei;
128 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
133 ei->i_lenExtents = 0;
134 ei->i_next_alloc_block = 0;
135 ei->i_next_alloc_goal = 0;
138 return &ei->vfs_inode;
141 static void udf_destroy_inode(struct inode *inode)
143 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
146 static void init_once(struct kmem_cache *cachep, void *foo)
148 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
150 ei->i_ext.i_data = NULL;
151 inode_init_once(&ei->vfs_inode);
154 static int init_inodecache(void)
156 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
157 sizeof(struct udf_inode_info),
158 0, (SLAB_RECLAIM_ACCOUNT |
161 if (!udf_inode_cachep)
166 static void destroy_inodecache(void)
168 kmem_cache_destroy(udf_inode_cachep);
171 /* Superblock operations */
172 static const struct super_operations udf_sb_ops = {
173 .alloc_inode = udf_alloc_inode,
174 .destroy_inode = udf_destroy_inode,
175 .write_inode = udf_write_inode,
176 .delete_inode = udf_delete_inode,
177 .clear_inode = udf_clear_inode,
178 .put_super = udf_put_super,
179 .write_super = udf_write_super,
180 .statfs = udf_statfs,
181 .remount_fs = udf_remount_fs,
186 unsigned int blocksize;
187 unsigned int session;
188 unsigned int lastblock;
191 unsigned short partition;
192 unsigned int fileset;
193 unsigned int rootdir;
198 struct nls_table *nls_map;
201 static int __init init_udf_fs(void)
205 err = init_inodecache();
208 err = register_filesystem(&udf_fstype);
215 destroy_inodecache();
221 static void __exit exit_udf_fs(void)
223 unregister_filesystem(&udf_fstype);
224 destroy_inodecache();
227 module_init(init_udf_fs)
228 module_exit(exit_udf_fs)
230 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
232 struct udf_sb_info *sbi = UDF_SB(sb);
234 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
236 if (!sbi->s_partmaps) {
237 udf_error(sb, __FUNCTION__,
238 "Unable to allocate space for %d partition maps",
240 sbi->s_partitions = 0;
244 sbi->s_partitions = count;
252 * Parse mount options.
255 * The following mount options are supported:
257 * gid= Set the default group.
258 * umask= Set the default umask.
259 * uid= Set the default user.
260 * bs= Set the block size.
261 * unhide Show otherwise hidden files.
262 * undelete Show deleted files in lists.
263 * adinicb Embed data in the inode (default)
264 * noadinicb Don't embed data in the inode
265 * shortad Use short ad's
266 * longad Use long ad's (default)
267 * nostrict Unset strict conformance
268 * iocharset= Set the NLS character set
270 * The remaining are for debugging and disaster recovery:
272 * novrs Skip volume sequence recognition
274 * The following expect a offset from 0.
276 * session= Set the CDROM session (default= last session)
277 * anchor= Override standard anchor location. (default= 256)
278 * volume= Override the VolumeDesc location. (unused)
279 * partition= Override the PartitionDesc location. (unused)
280 * lastblock= Set the last block of the filesystem/
282 * The following expect a offset from the partition root.
284 * fileset= Override the fileset block location. (unused)
285 * rootdir= Override the root directory location. (unused)
286 * WARNING: overriding the rootdir to a non-directory may
287 * yield highly unpredictable results.
290 * options Pointer to mount options string.
291 * uopts Pointer to mount options variable.
294 * <return> 1 Mount options parsed okay.
295 * <return> 0 Error parsing mount options.
298 * July 1, 1997 - Andrew E. Mileski
299 * Written, tested, and released.
303 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
304 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
305 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
306 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
307 Opt_rootdir, Opt_utf8, Opt_iocharset,
308 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore
311 static match_table_t tokens = {
312 {Opt_novrs, "novrs"},
313 {Opt_nostrict, "nostrict"},
315 {Opt_unhide, "unhide"},
316 {Opt_undelete, "undelete"},
317 {Opt_noadinicb, "noadinicb"},
318 {Opt_adinicb, "adinicb"},
319 {Opt_shortad, "shortad"},
320 {Opt_longad, "longad"},
321 {Opt_uforget, "uid=forget"},
322 {Opt_uignore, "uid=ignore"},
323 {Opt_gforget, "gid=forget"},
324 {Opt_gignore, "gid=ignore"},
327 {Opt_umask, "umask=%o"},
328 {Opt_session, "session=%u"},
329 {Opt_lastblock, "lastblock=%u"},
330 {Opt_anchor, "anchor=%u"},
331 {Opt_volume, "volume=%u"},
332 {Opt_partition, "partition=%u"},
333 {Opt_fileset, "fileset=%u"},
334 {Opt_rootdir, "rootdir=%u"},
336 {Opt_iocharset, "iocharset=%s"},
340 static int udf_parse_options(char *options, struct udf_options *uopt)
346 uopt->blocksize = 2048;
347 uopt->partition = 0xFFFF;
348 uopt->session = 0xFFFFFFFF;
351 uopt->volume = 0xFFFFFFFF;
352 uopt->rootdir = 0xFFFFFFFF;
353 uopt->fileset = 0xFFFFFFFF;
354 uopt->nls_map = NULL;
359 while ((p = strsep(&options, ",")) != NULL) {
360 substring_t args[MAX_OPT_ARGS];
365 token = match_token(p, tokens, args);
370 if (match_int(&args[0], &option))
372 uopt->blocksize = option;
375 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
378 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
381 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
384 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
387 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
390 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
393 if (match_int(args, &option))
396 uopt->flags |= (1 << UDF_FLAG_GID_SET);
399 if (match_int(args, &option))
402 uopt->flags |= (1 << UDF_FLAG_UID_SET);
405 if (match_octal(args, &option))
407 uopt->umask = option;
410 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
413 if (match_int(args, &option))
415 uopt->session = option;
418 if (match_int(args, &option))
420 uopt->lastblock = option;
423 if (match_int(args, &option))
425 uopt->anchor = option;
428 if (match_int(args, &option))
430 uopt->volume = option;
433 if (match_int(args, &option))
435 uopt->partition = option;
438 if (match_int(args, &option))
440 uopt->fileset = option;
443 if (match_int(args, &option))
445 uopt->rootdir = option;
448 uopt->flags |= (1 << UDF_FLAG_UTF8);
450 #ifdef CONFIG_UDF_NLS
452 uopt->nls_map = load_nls(args[0].from);
453 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
457 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
460 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
463 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
466 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
469 printk(KERN_ERR "udf: bad mount option \"%s\" "
470 "or missing value\n", p);
477 static void udf_write_super(struct super_block *sb)
481 if (!(sb->s_flags & MS_RDONLY))
488 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
490 struct udf_options uopt;
491 struct udf_sb_info *sbi = UDF_SB(sb);
493 uopt.flags = sbi->s_flags;
494 uopt.uid = sbi->s_uid;
495 uopt.gid = sbi->s_gid;
496 uopt.umask = sbi->s_umask;
498 if (!udf_parse_options(options, &uopt))
501 sbi->s_flags = uopt.flags;
502 sbi->s_uid = uopt.uid;
503 sbi->s_gid = uopt.gid;
504 sbi->s_umask = uopt.umask;
506 if (sbi->s_lvid_bh) {
507 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
508 if (write_rev > UDF_MAX_WRITE_VERSION)
512 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
514 if (*flags & MS_RDONLY)
526 * Set the block size to be used in all transfers.
529 * To allow room for a DMA transfer, it is best to guess big when unsure.
530 * This routine picks 2048 bytes as the blocksize when guessing. This
531 * should be adequate until devices with larger block sizes become common.
533 * Note that the Linux kernel can currently only deal with blocksizes of
534 * 512, 1024, 2048, 4096, and 8192 bytes.
537 * sb Pointer to _locked_ superblock.
540 * sb->s_blocksize Blocksize.
541 * sb->s_blocksize_bits log2 of blocksize.
542 * <return> 0 Blocksize is valid.
543 * <return> 1 Blocksize is invalid.
546 * July 1, 1997 - Andrew E. Mileski
547 * Written, tested, and released.
549 static int udf_set_blocksize(struct super_block *sb, int bsize)
551 if (!sb_min_blocksize(sb, bsize)) {
552 udf_debug("Bad block size (%d)\n", bsize);
553 printk(KERN_ERR "udf: bad block size (%d)\n", bsize);
557 return sb->s_blocksize;
560 static int udf_vrs(struct super_block *sb, int silent)
562 struct volStructDesc *vsd = NULL;
565 struct buffer_head *bh = NULL;
569 struct udf_sb_info *sbi;
571 /* Block size must be a multiple of 512 */
572 if (sb->s_blocksize & 511)
576 if (sb->s_blocksize < sizeof(struct volStructDesc))
577 sectorsize = sizeof(struct volStructDesc);
579 sectorsize = sb->s_blocksize;
581 sector += (sbi->s_session << sb->s_blocksize_bits);
583 udf_debug("Starting at sector %u (%ld byte sectors)\n",
584 (sector >> sb->s_blocksize_bits), sb->s_blocksize);
585 /* Process the sequence (if applicable) */
586 for (; !nsr02 && !nsr03; sector += sectorsize) {
588 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
592 /* Look for ISO descriptors */
593 vsd = (struct volStructDesc *)(bh->b_data +
594 (sector & (sb->s_blocksize - 1)));
596 if (vsd->stdIdent[0] == 0) {
599 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
602 switch (vsd->structType) {
604 udf_debug("ISO9660 Boot Record found\n");
607 udf_debug("ISO9660 Primary Volume Descriptor "
611 udf_debug("ISO9660 Supplementary Volume "
612 "Descriptor found\n");
615 udf_debug("ISO9660 Volume Partition Descriptor "
619 udf_debug("ISO9660 Volume Descriptor Set "
620 "Terminator found\n");
623 udf_debug("ISO9660 VRS (%u) found\n",
627 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
630 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
634 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
637 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
647 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
657 * Find an anchor volume descriptor.
660 * sb Pointer to _locked_ superblock.
661 * lastblock Last block on media.
664 * <return> 1 if not found, 0 if ok
667 * July 1, 1997 - Andrew E. Mileski
668 * Written, tested, and released.
670 static void udf_find_anchor(struct super_block *sb)
673 struct buffer_head *bh = NULL;
677 struct udf_sb_info *sbi;
680 lastblock = sbi->s_last_block;
683 int varlastblock = udf_variable_to_fixed(lastblock);
684 int last[] = { lastblock, lastblock - 2,
685 lastblock - 150, lastblock - 152,
686 varlastblock, varlastblock - 2,
687 varlastblock - 150, varlastblock - 152 };
691 /* Search for an anchor volume descriptor pointer */
693 /* according to spec, anchor is in either:
697 * however, if the disc isn't closed, it could be 512 */
699 for (i = 0; !lastblock && i < ARRAY_SIZE(last); i++) {
700 ident = location = 0;
702 bh = sb_bread(sb, last[i]);
704 tag *t = (tag *)bh->b_data;
705 ident = le16_to_cpu(t->tagIdent);
706 location = le32_to_cpu(t->tagLocation);
711 if (ident == TAG_IDENT_AVDP) {
712 if (location == last[i] - sbi->s_session) {
713 lastblock = last[i] - sbi->s_session;
714 sbi->s_anchor[0] = lastblock;
715 sbi->s_anchor[1] = lastblock - 256;
716 } else if (location == udf_variable_to_fixed(last[i]) - sbi->s_session) {
717 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
718 lastblock = udf_variable_to_fixed(last[i]) - sbi->s_session;
719 sbi->s_anchor[0] = lastblock;
720 sbi->s_anchor[1] = lastblock - 256 - sbi->s_session;
722 udf_debug("Anchor found at block %d, location mismatch %d.\n",
725 } else if (ident == TAG_IDENT_FE || ident == TAG_IDENT_EFE) {
727 sbi->s_anchor[3] = 512;
729 ident = location = 0;
730 if (last[i] >= 256) {
731 bh = sb_bread(sb, last[i] - 256);
733 tag *t = (tag *)bh->b_data;
734 ident = le16_to_cpu(t->tagIdent);
735 location = le32_to_cpu(t->tagLocation);
740 if (ident == TAG_IDENT_AVDP &&
741 location == last[i] - 256 - sbi->s_session) {
743 sbi->s_anchor[1] = last[i] - 256;
745 ident = location = 0;
746 if (last[i] >= 312 + sbi->s_session) {
747 bh = sb_bread(sb, last[i] - 312 - sbi->s_session);
749 tag *t = (tag *)bh->b_data;
750 ident = le16_to_cpu(t->tagIdent);
751 location = le32_to_cpu(t->tagLocation);
756 if (ident == TAG_IDENT_AVDP &&
757 location == udf_variable_to_fixed(last[i]) - 256) {
758 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
759 lastblock = udf_variable_to_fixed(last[i]);
760 sbi->s_anchor[1] = lastblock - 256;
768 /* We haven't found the lastblock. check 312 */
769 bh = sb_bread(sb, 312 + sbi->s_session);
771 tag *t = (tag *)bh->b_data;
772 ident = le16_to_cpu(t->tagIdent);
773 location = le32_to_cpu(t->tagLocation);
776 if (ident == TAG_IDENT_AVDP && location == 256)
777 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
781 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
782 if (sbi->s_anchor[i]) {
783 bh = udf_read_tagged(sb, sbi->s_anchor[i],
784 sbi->s_anchor[i], &ident);
786 sbi->s_anchor[i] = 0;
789 if ((ident != TAG_IDENT_AVDP) &&
790 (i || (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE)))
791 sbi->s_anchor[i] = 0;
796 sbi->s_last_block = lastblock;
799 static int udf_find_fileset(struct super_block *sb,
800 kernel_lb_addr *fileset,
801 kernel_lb_addr *root)
803 struct buffer_head *bh = NULL;
806 struct udf_sb_info *sbi;
808 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
809 fileset->partitionReferenceNum != 0xFFFF) {
810 bh = udf_read_ptagged(sb, *fileset, 0, &ident);
814 } else if (ident != TAG_IDENT_FSD) {
823 /* Search backwards through the partitions */
824 kernel_lb_addr newfileset;
826 /* --> cvg: FIXME - is it reasonable? */
829 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
830 (newfileset.partitionReferenceNum != 0xFFFF &&
831 fileset->logicalBlockNum == 0xFFFFFFFF &&
832 fileset->partitionReferenceNum == 0xFFFF);
833 newfileset.partitionReferenceNum--) {
834 lastblock = sbi->s_partmaps
835 [newfileset.partitionReferenceNum]
837 newfileset.logicalBlockNum = 0;
840 bh = udf_read_ptagged(sb, newfileset, 0,
843 newfileset.logicalBlockNum++;
850 struct spaceBitmapDesc *sp;
851 sp = (struct spaceBitmapDesc *)bh->b_data;
852 newfileset.logicalBlockNum += 1 +
853 ((le32_to_cpu(sp->numOfBytes) +
854 sizeof(struct spaceBitmapDesc) - 1)
855 >> sb->s_blocksize_bits);
860 *fileset = newfileset;
863 newfileset.logicalBlockNum++;
868 } while (newfileset.logicalBlockNum < lastblock &&
869 fileset->logicalBlockNum == 0xFFFFFFFF &&
870 fileset->partitionReferenceNum == 0xFFFF);
874 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
875 fileset->partitionReferenceNum != 0xFFFF) && bh) {
876 udf_debug("Fileset at block=%d, partition=%d\n",
877 fileset->logicalBlockNum,
878 fileset->partitionReferenceNum);
880 sbi->s_partition = fileset->partitionReferenceNum;
881 udf_load_fileset(sb, bh, root);
888 static void udf_load_pvoldesc(struct super_block *sb, struct buffer_head *bh)
890 struct primaryVolDesc *pvoldesc;
896 pvoldesc = (struct primaryVolDesc *)bh->b_data;
898 if (udf_stamp_to_time(&recording, &recording_usec,
899 lets_to_cpu(pvoldesc->recordingDateAndTime))) {
901 ts = lets_to_cpu(pvoldesc->recordingDateAndTime);
902 udf_debug("recording time %ld/%ld, %04u/%02u/%02u"
904 recording, recording_usec,
905 ts.year, ts.month, ts.day, ts.hour,
906 ts.minute, ts.typeAndTimezone);
907 UDF_SB(sb)->s_record_time.tv_sec = recording;
908 UDF_SB(sb)->s_record_time.tv_nsec = recording_usec * 1000;
911 if (!udf_build_ustr(&instr, pvoldesc->volIdent, 32)) {
912 if (udf_CS0toUTF8(&outstr, &instr)) {
913 strncpy(UDF_SB(sb)->s_volume_ident, outstr.u_name,
914 outstr.u_len > 31 ? 31 : outstr.u_len);
915 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
919 if (!udf_build_ustr(&instr, pvoldesc->volSetIdent, 128)) {
920 if (udf_CS0toUTF8(&outstr, &instr))
921 udf_debug("volSetIdent[] = '%s'\n", outstr.u_name);
925 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
926 kernel_lb_addr *root)
928 struct fileSetDesc *fset;
930 fset = (struct fileSetDesc *)bh->b_data;
932 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
934 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
936 udf_debug("Rootdir at block=%d, partition=%d\n",
937 root->logicalBlockNum, root->partitionReferenceNum);
940 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
942 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
943 return (map->s_partition_len +
944 (sizeof(struct spaceBitmapDesc) << 3) +
945 (sb->s_blocksize * 8) - 1) /
946 (sb->s_blocksize * 8);
949 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
951 struct udf_bitmap *bitmap;
955 nr_groups = udf_compute_nr_groups(sb, index);
956 size = sizeof(struct udf_bitmap) +
957 (sizeof(struct buffer_head *) * nr_groups);
959 if (size <= PAGE_SIZE)
960 bitmap = kmalloc(size, GFP_KERNEL);
962 bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
964 if (bitmap == NULL) {
965 udf_error(sb, __FUNCTION__,
966 "Unable to allocate space for bitmap "
967 "and %d buffer_head pointers", nr_groups);
971 memset(bitmap, 0x00, size);
972 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
973 bitmap->s_nr_groups = nr_groups;
977 static int udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
979 struct partitionDesc *p;
981 struct udf_part_map *map;
982 struct udf_sb_info *sbi;
984 p = (struct partitionDesc *)bh->b_data;
987 for (i = 0; i < sbi->s_partitions; i++) {
988 map = &sbi->s_partmaps[i];
989 udf_debug("Searching map: (%d == %d)\n",
990 map->s_partition_num, le16_to_cpu(p->partitionNumber));
991 if (map->s_partition_num == le16_to_cpu(p->partitionNumber)) {
992 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
993 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
994 if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_READ_ONLY)
995 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
996 if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_WRITE_ONCE)
997 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
998 if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_REWRITABLE)
999 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1000 if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_OVERWRITABLE)
1001 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1003 if (!strcmp(p->partitionContents.ident,
1004 PD_PARTITION_CONTENTS_NSR02) ||
1005 !strcmp(p->partitionContents.ident,
1006 PD_PARTITION_CONTENTS_NSR03)) {
1007 struct partitionHeaderDesc *phd;
1009 phd = (struct partitionHeaderDesc *)(p->partitionContentsUse);
1010 if (phd->unallocSpaceTable.extLength) {
1011 kernel_lb_addr loc = {
1012 .logicalBlockNum = le32_to_cpu(phd->unallocSpaceTable.extPosition),
1013 .partitionReferenceNum = i,
1016 map->s_uspace.s_table =
1018 if (!map->s_uspace.s_table) {
1019 udf_debug("cannot load unallocSpaceTable (part %d)\n", i);
1022 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1023 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1024 i, map->s_uspace.s_table->i_ino);
1026 if (phd->unallocSpaceBitmap.extLength) {
1027 map->s_uspace.s_bitmap = udf_sb_alloc_bitmap(sb, i);
1028 if (map->s_uspace.s_bitmap != NULL) {
1029 map->s_uspace.s_bitmap->s_extLength =
1030 le32_to_cpu(phd->unallocSpaceBitmap.extLength);
1031 map->s_uspace.s_bitmap->s_extPosition =
1032 le32_to_cpu(phd->unallocSpaceBitmap.extPosition);
1033 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1034 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1035 i, map->s_uspace.s_bitmap->s_extPosition);
1038 if (phd->partitionIntegrityTable.extLength)
1039 udf_debug("partitionIntegrityTable (part %d)\n", i);
1040 if (phd->freedSpaceTable.extLength) {
1041 kernel_lb_addr loc = {
1042 .logicalBlockNum = le32_to_cpu(phd->freedSpaceTable.extPosition),
1043 .partitionReferenceNum = i,
1046 map->s_fspace.s_table =
1048 if (!map->s_fspace.s_table) {
1049 udf_debug("cannot load freedSpaceTable (part %d)\n", i);
1052 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1053 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1054 i, map->s_fspace.s_table->i_ino);
1056 if (phd->freedSpaceBitmap.extLength) {
1057 map->s_fspace.s_bitmap = udf_sb_alloc_bitmap(sb, i);
1058 if (map->s_fspace.s_bitmap != NULL) {
1059 map->s_fspace.s_bitmap->s_extLength =
1060 le32_to_cpu(phd->freedSpaceBitmap.extLength);
1061 map->s_fspace.s_bitmap->s_extPosition =
1062 le32_to_cpu(phd->freedSpaceBitmap.extPosition);
1063 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1064 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1065 i, map->s_fspace.s_bitmap->s_extPosition);
1072 if (i == sbi->s_partitions) {
1073 udf_debug("Partition (%d) not found in partition map\n",
1074 le16_to_cpu(p->partitionNumber));
1076 udf_debug("Partition (%d:%d type %x) starts at physical %d, "
1077 "block length %d\n",
1078 le16_to_cpu(p->partitionNumber), i,
1079 map->s_partition_type,
1080 map->s_partition_root,
1081 map->s_partition_len);
1086 static int udf_load_logicalvol(struct super_block *sb, struct buffer_head *bh,
1087 kernel_lb_addr *fileset)
1089 struct logicalVolDesc *lvd;
1092 struct udf_sb_info *sbi = UDF_SB(sb);
1094 lvd = (struct logicalVolDesc *)bh->b_data;
1096 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1100 for (i = 0, offset = 0;
1101 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
1102 i++, offset += ((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapLength) {
1103 struct udf_part_map *map = &sbi->s_partmaps[i];
1104 type = ((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapType;
1106 struct genericPartitionMap1 *gpm1 = (struct genericPartitionMap1 *)&(lvd->partitionMaps[offset]);
1107 map->s_partition_type = UDF_TYPE1_MAP15;
1108 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1109 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1110 map->s_partition_func = NULL;
1111 } else if (type == 2) {
1112 struct udfPartitionMap2 *upm2 = (struct udfPartitionMap2 *)&(lvd->partitionMaps[offset]);
1113 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, strlen(UDF_ID_VIRTUAL))) {
1114 if (le16_to_cpu(((__le16 *)upm2->partIdent.identSuffix)[0]) == 0x0150) {
1115 map->s_partition_type = UDF_VIRTUAL_MAP15;
1116 map->s_partition_func = udf_get_pblock_virt15;
1117 } else if (le16_to_cpu(((__le16 *)upm2->partIdent.identSuffix)[0]) == 0x0200) {
1118 map->s_partition_type = UDF_VIRTUAL_MAP20;
1119 map->s_partition_func = udf_get_pblock_virt20;
1121 } else if (!strncmp(upm2->partIdent.ident, UDF_ID_SPARABLE, strlen(UDF_ID_SPARABLE))) {
1124 struct sparingTable *st;
1125 struct sparablePartitionMap *spm = (struct sparablePartitionMap *)&(lvd->partitionMaps[offset]);
1127 map->s_partition_type = UDF_SPARABLE_MAP15;
1128 map->s_type_specific.s_sparing.s_packet_len = le16_to_cpu(spm->packetLength);
1129 for (j = 0; j < spm->numSparingTables; j++) {
1130 loc = le32_to_cpu(spm->locSparingTable[j]);
1131 map->s_type_specific.s_sparing.s_spar_map[j] =
1132 udf_read_tagged(sb, loc, loc, &ident);
1133 if (map->s_type_specific.s_sparing.s_spar_map[j] != NULL) {
1134 st = (struct sparingTable *)map->s_type_specific.s_sparing.s_spar_map[j]->b_data;
1136 strncmp(st->sparingIdent.ident, UDF_ID_SPARING, strlen(UDF_ID_SPARING))) {
1137 brelse(map->s_type_specific.s_sparing.s_spar_map[j]);
1138 map->s_type_specific.s_sparing.s_spar_map[j] = NULL;
1142 map->s_partition_func = udf_get_pblock_spar15;
1144 udf_debug("Unknown ident: %s\n",
1145 upm2->partIdent.ident);
1148 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1149 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1151 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1152 i, map->s_partition_num, type,
1153 map->s_volumeseqnum);
1157 long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]);
1159 *fileset = lelb_to_cpu(la->extLocation);
1160 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1161 "partition=%d\n", fileset->logicalBlockNum,
1162 fileset->partitionReferenceNum);
1164 if (lvd->integritySeqExt.extLength)
1165 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1171 * udf_load_logicalvolint
1174 static void udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc)
1176 struct buffer_head *bh = NULL;
1178 struct udf_sb_info *sbi = UDF_SB(sb);
1179 struct logicalVolIntegrityDesc *lvid;
1181 while (loc.extLength > 0 &&
1182 (bh = udf_read_tagged(sb, loc.extLocation,
1183 loc.extLocation, &ident)) &&
1184 ident == TAG_IDENT_LVID) {
1185 sbi->s_lvid_bh = bh;
1186 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1188 if (lvid->nextIntegrityExt.extLength)
1189 udf_load_logicalvolint(sb,
1190 leea_to_cpu(lvid->nextIntegrityExt));
1192 if (sbi->s_lvid_bh != bh)
1194 loc.extLength -= sb->s_blocksize;
1197 if (sbi->s_lvid_bh != bh)
1202 * udf_process_sequence
1205 * Process a main/reserve volume descriptor sequence.
1208 * sb Pointer to _locked_ superblock.
1209 * block First block of first extent of the sequence.
1210 * lastblock Lastblock of first extent of the sequence.
1213 * July 1, 1997 - Andrew E. Mileski
1214 * Written, tested, and released.
1216 static int udf_process_sequence(struct super_block *sb, long block,
1217 long lastblock, kernel_lb_addr *fileset)
1219 struct buffer_head *bh = NULL;
1220 struct udf_vds_record vds[VDS_POS_LENGTH];
1221 struct generic_desc *gd;
1222 struct volDescPtr *vdp;
1227 long next_s = 0, next_e = 0;
1229 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1231 /* Read the main descriptor sequence */
1232 for (; (!done && block <= lastblock); block++) {
1234 bh = udf_read_tagged(sb, block, block, &ident);
1238 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1239 gd = (struct generic_desc *)bh->b_data;
1240 vdsn = le32_to_cpu(gd->volDescSeqNum);
1242 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1243 if (vdsn >= vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum) {
1244 vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum = vdsn;
1245 vds[VDS_POS_PRIMARY_VOL_DESC].block = block;
1248 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1249 if (vdsn >= vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum) {
1250 vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum = vdsn;
1251 vds[VDS_POS_VOL_DESC_PTR].block = block;
1253 vdp = (struct volDescPtr *)bh->b_data;
1254 next_s = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation);
1255 next_e = le32_to_cpu(vdp->nextVolDescSeqExt.extLength);
1256 next_e = next_e >> sb->s_blocksize_bits;
1260 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1261 if (vdsn >= vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum) {
1262 vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum = vdsn;
1263 vds[VDS_POS_IMP_USE_VOL_DESC].block = block;
1266 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1267 if (!vds[VDS_POS_PARTITION_DESC].block)
1268 vds[VDS_POS_PARTITION_DESC].block = block;
1270 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1271 if (vdsn >= vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum) {
1272 vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum = vdsn;
1273 vds[VDS_POS_LOGICAL_VOL_DESC].block = block;
1276 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1277 if (vdsn >= vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum) {
1278 vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum = vdsn;
1279 vds[VDS_POS_UNALLOC_SPACE_DESC].block = block;
1282 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1283 vds[VDS_POS_TERMINATING_DESC].block = block;
1287 next_s = next_e = 0;
1295 for (i = 0; i < VDS_POS_LENGTH; i++) {
1297 bh = udf_read_tagged(sb, vds[i].block, vds[i].block,
1300 if (i == VDS_POS_PRIMARY_VOL_DESC) {
1301 udf_load_pvoldesc(sb, bh);
1302 } else if (i == VDS_POS_LOGICAL_VOL_DESC) {
1303 if (udf_load_logicalvol(sb, bh, fileset)) {
1307 } else if (i == VDS_POS_PARTITION_DESC) {
1308 struct buffer_head *bh2 = NULL;
1309 if (udf_load_partdesc(sb, bh)) {
1313 for (j = vds[i].block + 1;
1314 j < vds[VDS_POS_TERMINATING_DESC].block;
1316 bh2 = udf_read_tagged(sb, j, j, &ident);
1317 gd = (struct generic_desc *)bh2->b_data;
1318 if (ident == TAG_IDENT_PD)
1319 if (udf_load_partdesc(sb,
1338 static int udf_check_valid(struct super_block *sb, int novrs, int silent)
1343 udf_debug("Validity check skipped because of novrs option\n");
1346 /* Check that it is NSR02 compliant */
1347 /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
1349 block = udf_vrs(sb, silent);
1351 struct udf_sb_info *sbi = UDF_SB(sb);
1352 udf_debug("Failed to read byte 32768. Assuming open "
1353 "disc. Skipping validity check\n");
1354 if (!sbi->s_last_block)
1355 sbi->s_last_block = udf_get_last_block(sb);
1362 static int udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset)
1364 struct anchorVolDescPtr *anchor;
1366 struct buffer_head *bh;
1367 long main_s, main_e, reserve_s, reserve_e;
1369 struct udf_sb_info *sbi;
1375 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
1376 if (sbi->s_anchor[i] &&
1377 (bh = udf_read_tagged(sb, sbi->s_anchor[i],
1378 sbi->s_anchor[i], &ident))) {
1379 anchor = (struct anchorVolDescPtr *)bh->b_data;
1381 /* Locate the main sequence */
1382 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1383 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1384 main_e = main_e >> sb->s_blocksize_bits;
1387 /* Locate the reserve sequence */
1388 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1389 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1390 reserve_e = reserve_e >> sb->s_blocksize_bits;
1391 reserve_e += reserve_s;
1395 /* Process the main & reserve sequences */
1396 /* responsible for finding the PartitionDesc(s) */
1397 if (!(udf_process_sequence(sb, main_s, main_e, fileset) &&
1398 udf_process_sequence(sb, reserve_s, reserve_e, fileset)))
1403 if (i == ARRAY_SIZE(sbi->s_anchor)) {
1404 udf_debug("No Anchor block found\n");
1407 udf_debug("Using anchor in block %d\n", sbi->s_anchor[i]);
1409 for (i = 0; i < sbi->s_partitions; i++) {
1410 kernel_lb_addr uninitialized_var(ino);
1411 struct udf_part_map *map = &sbi->s_partmaps[i];
1412 switch (map->s_partition_type) {
1413 case UDF_VIRTUAL_MAP15:
1414 case UDF_VIRTUAL_MAP20:
1415 if (!sbi->s_last_block) {
1416 sbi->s_last_block = udf_get_last_block(sb);
1417 udf_find_anchor(sb);
1420 if (!sbi->s_last_block) {
1421 udf_debug("Unable to determine Lastblock (For "
1422 "Virtual Partition)\n");
1426 for (j = 0; j < sbi->s_partitions; j++) {
1427 struct udf_part_map *map2 = &sbi->s_partmaps[j];
1429 map->s_volumeseqnum == map2->s_volumeseqnum &&
1430 map->s_partition_num == map2->s_partition_num) {
1431 ino.partitionReferenceNum = j;
1432 ino.logicalBlockNum = sbi->s_last_block - map2->s_partition_root;
1437 if (j == sbi->s_partitions)
1440 sbi->s_vat_inode = udf_iget(sb, ino);
1441 if (!sbi->s_vat_inode)
1444 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1445 map->s_type_specific.s_virtual.s_start_offset =
1446 udf_ext0_offset(sbi->s_vat_inode);
1447 map->s_type_specific.s_virtual.s_num_entries =
1448 (sbi->s_vat_inode->i_size - 36) >> 2;
1449 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1452 pos = udf_block_map(sbi->s_vat_inode, 0);
1453 bh = sb_bread(sb, pos);
1456 map->s_type_specific.s_virtual.s_start_offset =
1457 le16_to_cpu(((struct virtualAllocationTable20 *)bh->b_data +
1458 udf_ext0_offset(sbi->s_vat_inode))->lengthHeader) +
1459 udf_ext0_offset(sbi->s_vat_inode);
1460 map->s_type_specific.s_virtual.s_num_entries = (sbi->s_vat_inode->i_size -
1461 map->s_type_specific.s_virtual.s_start_offset) >> 2;
1464 map->s_partition_root = udf_get_pblock(sb, 0, i, 0);
1465 map->s_partition_len =
1466 sbi->s_partmaps[ino.partitionReferenceNum].
1473 static void udf_open_lvid(struct super_block *sb)
1475 struct udf_sb_info *sbi = UDF_SB(sb);
1476 struct buffer_head *bh = sbi->s_lvid_bh;
1479 kernel_timestamp cpu_time;
1480 struct logicalVolIntegrityDesc *lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1481 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sbi);
1483 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1484 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1485 if (udf_time_to_stamp(&cpu_time, CURRENT_TIME))
1486 lvid->recordingDateAndTime = cpu_to_lets(cpu_time);
1487 lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN;
1489 lvid->descTag.descCRC = cpu_to_le16(udf_crc((char *)lvid + sizeof(tag),
1490 le16_to_cpu(lvid->descTag.descCRCLength), 0));
1492 lvid->descTag.tagChecksum = 0;
1493 for (i = 0; i < 16; i++)
1495 lvid->descTag.tagChecksum +=
1496 ((uint8_t *) &(lvid->descTag))[i];
1498 mark_buffer_dirty(bh);
1502 static void udf_close_lvid(struct super_block *sb)
1504 kernel_timestamp cpu_time;
1506 struct udf_sb_info *sbi = UDF_SB(sb);
1507 struct buffer_head *bh = sbi->s_lvid_bh;
1508 struct logicalVolIntegrityDesc *lvid;
1513 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1515 if (lvid->integrityType == LVID_INTEGRITY_TYPE_OPEN) {
1516 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sbi);
1517 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1518 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1519 if (udf_time_to_stamp(&cpu_time, CURRENT_TIME))
1520 lvid->recordingDateAndTime = cpu_to_lets(cpu_time);
1521 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1522 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1523 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1524 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1525 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1526 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1527 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1529 lvid->descTag.descCRC =
1530 cpu_to_le16(udf_crc((char *)lvid + sizeof(tag),
1531 le16_to_cpu(lvid->descTag.descCRCLength), 0));
1533 lvid->descTag.tagChecksum = 0;
1534 for (i = 0; i < 16; i++)
1536 lvid->descTag.tagChecksum +=
1537 ((uint8_t *)&(lvid->descTag))[i];
1539 mark_buffer_dirty(bh);
1543 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1546 int nr_groups = bitmap->s_nr_groups;
1547 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * nr_groups);
1549 for (i = 0; i < nr_groups; i++)
1550 if (bitmap->s_block_bitmap[i])
1551 brelse(bitmap->s_block_bitmap[i]);
1553 if (size <= PAGE_SIZE)
1563 * Complete the specified super block.
1566 * sb Pointer to superblock to complete - never NULL.
1567 * sb->s_dev Device to read suberblock from.
1568 * options Pointer to mount options.
1569 * silent Silent flag.
1572 * July 1, 1997 - Andrew E. Mileski
1573 * Written, tested, and released.
1575 static int udf_fill_super(struct super_block *sb, void *options, int silent)
1578 struct inode *inode = NULL;
1579 struct udf_options uopt;
1580 kernel_lb_addr rootdir, fileset;
1581 struct udf_sb_info *sbi;
1583 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1588 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1592 sb->s_fs_info = sbi;
1594 mutex_init(&sbi->s_alloc_mutex);
1596 if (!udf_parse_options((char *)options, &uopt))
1599 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
1600 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1601 udf_error(sb, "udf_read_super",
1602 "utf8 cannot be combined with iocharset\n");
1605 #ifdef CONFIG_UDF_NLS
1606 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1607 uopt.nls_map = load_nls_default();
1609 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1611 udf_debug("Using default NLS map\n");
1614 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1615 uopt.flags |= (1 << UDF_FLAG_UTF8);
1617 fileset.logicalBlockNum = 0xFFFFFFFF;
1618 fileset.partitionReferenceNum = 0xFFFF;
1620 sbi->s_flags = uopt.flags;
1621 sbi->s_uid = uopt.uid;
1622 sbi->s_gid = uopt.gid;
1623 sbi->s_umask = uopt.umask;
1624 sbi->s_nls_map = uopt.nls_map;
1626 /* Set the block size for all transfers */
1627 if (!udf_set_blocksize(sb, uopt.blocksize))
1630 if (uopt.session == 0xFFFFFFFF)
1631 sbi->s_session = udf_get_last_session(sb);
1633 sbi->s_session = uopt.session;
1635 udf_debug("Multi-session=%d\n", sbi->s_session);
1637 sbi->s_last_block = uopt.lastblock;
1638 sbi->s_anchor[0] = sbi->s_anchor[1] = 0;
1639 sbi->s_anchor[2] = uopt.anchor;
1640 sbi->s_anchor[3] = 256;
1642 if (udf_check_valid(sb, uopt.novrs, silent)) {
1643 /* read volume recognition sequences */
1644 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1648 udf_find_anchor(sb);
1650 /* Fill in the rest of the superblock */
1651 sb->s_op = &udf_sb_ops;
1654 sb->s_magic = UDF_SUPER_MAGIC;
1655 sb->s_time_gran = 1000;
1657 if (udf_load_partition(sb, &fileset)) {
1658 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
1662 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1664 if (sbi->s_lvid_bh) {
1665 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sbi);
1666 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1667 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
1668 /* uint16_t maxUDFWriteRev = le16_to_cpu(lvidiu->maxUDFWriteRev); */
1670 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
1671 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x (max is %x)\n",
1672 le16_to_cpu(lvidiu->minUDFReadRev),
1673 UDF_MAX_READ_VERSION);
1675 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) {
1676 sb->s_flags |= MS_RDONLY;
1679 sbi->s_udfrev = minUDFWriteRev;
1681 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
1682 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
1683 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
1684 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
1687 if (!sbi->s_partitions) {
1688 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
1692 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & UDF_PART_FLAG_READ_ONLY) {
1693 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; forcing readonly mount\n");
1694 sb->s_flags |= MS_RDONLY;
1697 if (udf_find_fileset(sb, &fileset, &rootdir)) {
1698 printk(KERN_WARNING "UDF-fs: No fileset found\n");
1703 kernel_timestamp ts;
1704 udf_time_to_stamp(&ts, sbi->s_record_time);
1705 udf_info("UDF %s (%s) Mounting volume '%s', "
1706 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
1707 UDFFS_VERSION, UDFFS_DATE,
1708 sbi->s_volume_ident, ts.year, ts.month, ts.day,
1709 ts.hour, ts.minute, ts.typeAndTimezone);
1711 if (!(sb->s_flags & MS_RDONLY))
1714 /* Assign the root inode */
1715 /* assign inodes by physical block number */
1716 /* perhaps it's not extensible enough, but for now ... */
1717 inode = udf_iget(sb, rootdir);
1719 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, partition=%d\n",
1720 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
1724 /* Allocate a dentry for the root inode */
1725 sb->s_root = d_alloc_root(inode);
1727 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
1731 sb->s_maxbytes = MAX_LFS_FILESIZE;
1735 if (sbi->s_vat_inode)
1736 iput(sbi->s_vat_inode);
1737 if (sbi->s_partitions) {
1738 struct udf_part_map *map = &sbi->s_partmaps[sbi->s_partition];
1739 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1740 iput(map->s_uspace.s_table);
1741 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1742 iput(map->s_fspace.s_table);
1743 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1744 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1745 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1746 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1747 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1748 for (i = 0; i < 4; i++)
1749 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
1751 #ifdef CONFIG_UDF_NLS
1752 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
1753 unload_nls(sbi->s_nls_map);
1755 if (!(sb->s_flags & MS_RDONLY))
1757 brelse(sbi->s_lvid_bh);
1759 kfree(sbi->s_partmaps);
1761 sb->s_fs_info = NULL;
1766 void udf_error(struct super_block *sb, const char *function,
1767 const char *fmt, ...)
1771 if (!(sb->s_flags & MS_RDONLY)) {
1775 va_start(args, fmt);
1776 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1778 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
1779 sb->s_id, function, error_buf);
1782 void udf_warning(struct super_block *sb, const char *function,
1783 const char *fmt, ...)
1787 va_start(args, fmt);
1788 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1790 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
1791 sb->s_id, function, error_buf);
1798 * Prepare for destruction of the superblock.
1801 * Called before the filesystem is unmounted.
1804 * July 1, 1997 - Andrew E. Mileski
1805 * Written, tested, and released.
1807 static void udf_put_super(struct super_block *sb)
1810 struct udf_sb_info *sbi;
1813 if (sbi->s_vat_inode)
1814 iput(sbi->s_vat_inode);
1815 if (sbi->s_partitions) {
1816 struct udf_part_map *map = &sbi->s_partmaps[sbi->s_partition];
1817 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1818 iput(map->s_uspace.s_table);
1819 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1820 iput(map->s_fspace.s_table);
1821 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1822 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1823 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1824 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1825 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1826 for (i = 0; i < 4; i++)
1827 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
1829 #ifdef CONFIG_UDF_NLS
1830 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
1831 unload_nls(sbi->s_nls_map);
1833 if (!(sb->s_flags & MS_RDONLY))
1835 brelse(sbi->s_lvid_bh);
1836 kfree(sbi->s_partmaps);
1837 kfree(sb->s_fs_info);
1838 sb->s_fs_info = NULL;
1845 * Return info about the filesystem.
1848 * Called by sys_statfs()
1851 * July 1, 1997 - Andrew E. Mileski
1852 * Written, tested, and released.
1854 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1856 struct super_block *sb = dentry->d_sb;
1857 struct udf_sb_info *sbi = UDF_SB(sb);
1858 struct logicalVolIntegrityDescImpUse *lvidiu;
1860 if (sbi->s_lvid_bh != NULL)
1861 lvidiu = udf_sb_lvidiu(sbi);
1865 buf->f_type = UDF_SUPER_MAGIC;
1866 buf->f_bsize = sb->s_blocksize;
1867 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1868 buf->f_bfree = udf_count_free(sb);
1869 buf->f_bavail = buf->f_bfree;
1870 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
1871 le32_to_cpu(lvidiu->numDirs)) : 0)
1873 buf->f_ffree = buf->f_bfree;
1874 /* __kernel_fsid_t f_fsid */
1875 buf->f_namelen = UDF_NAME_LEN - 2;
1880 static unsigned char udf_bitmap_lookup[16] = {
1881 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4
1884 static unsigned int udf_count_free_bitmap(struct super_block *sb, struct udf_bitmap *bitmap)
1886 struct buffer_head *bh = NULL;
1887 unsigned int accum = 0;
1889 int block = 0, newblock;
1895 struct spaceBitmapDesc *bm;
1899 loc.logicalBlockNum = bitmap->s_extPosition;
1900 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
1901 bh = udf_read_ptagged(sb, loc, 0, &ident);
1904 printk(KERN_ERR "udf: udf_count_free failed\n");
1906 } else if (ident != TAG_IDENT_SBD) {
1908 printk(KERN_ERR "udf: udf_count_free failed\n");
1912 bm = (struct spaceBitmapDesc *)bh->b_data;
1913 bytes = le32_to_cpu(bm->numOfBytes);
1914 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
1915 ptr = (uint8_t *)bh->b_data;
1918 while ((bytes > 0) && (index < sb->s_blocksize)) {
1920 accum += udf_bitmap_lookup[value & 0x0f];
1921 accum += udf_bitmap_lookup[value >> 4];
1927 newblock = udf_get_lb_pblock(sb, loc, ++block);
1928 bh = udf_tread(sb, newblock);
1930 udf_debug("read failed\n");
1934 ptr = (uint8_t *)bh->b_data;
1945 static unsigned int udf_count_free_table(struct super_block *sb, struct inode *table)
1947 unsigned int accum = 0;
1949 kernel_lb_addr eloc;
1951 struct extent_position epos;
1955 epos.block = UDF_I_LOCATION(table);
1956 epos.offset = sizeof(struct unallocSpaceEntry);
1959 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
1960 accum += (elen >> table->i_sb->s_blocksize_bits);
1969 static unsigned int udf_count_free(struct super_block *sb)
1971 unsigned int accum = 0;
1972 struct udf_sb_info *sbi;
1973 struct udf_part_map *map;
1976 if (sbi->s_lvid_bh) {
1977 struct logicalVolIntegrityDesc *lvid = (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
1978 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
1979 accum = le32_to_cpu(lvid->freeSpaceTable[sbi->s_partition]);
1980 if (accum == 0xFFFFFFFF)
1988 map = &sbi->s_partmaps[sbi->s_partition];
1989 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
1990 accum += udf_count_free_bitmap(sb,
1991 map->s_uspace.s_bitmap);
1993 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
1994 accum += udf_count_free_bitmap(sb,
1995 map->s_fspace.s_bitmap);
2000 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2001 accum += udf_count_free_table(sb,
2002 map->s_uspace.s_table);
2004 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2005 accum += udf_count_free_table(sb,
2006 map->s_fspace.s_table);