ARM i.MX51: Full iomux support
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / udf / super.c
blob4a5c7c61836aaf6a1224740eefe607b886929c9e
1 /*
2 * super.c
4 * PURPOSE
5 * Super block routines for the OSTA-UDF(tm) filesystem.
7 * DESCRIPTION
8 * OSTA-UDF(tm) = Optical Storage Technology Association
9 * Universal Disk Format.
11 * This code is based on version 2.00 of the UDF specification,
12 * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346].
13 * http://www.osta.org/
14 * http://www.ecma.ch/
15 * http://www.iso.org/
17 * COPYRIGHT
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
27 * HISTORY
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)
41 #include "udfdecl.h"
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 <linux/crc-itu-t.h>
60 #include <asm/byteorder.h>
62 #include "udf_sb.h"
63 #include "udf_i.h"
65 #include <linux/init.h>
66 #include <asm/uaccess.h>
68 #define VDS_POS_PRIMARY_VOL_DESC 0
69 #define VDS_POS_UNALLOC_SPACE_DESC 1
70 #define VDS_POS_LOGICAL_VOL_DESC 2
71 #define VDS_POS_PARTITION_DESC 3
72 #define VDS_POS_IMP_USE_VOL_DESC 4
73 #define VDS_POS_VOL_DESC_PTR 5
74 #define VDS_POS_TERMINATING_DESC 6
75 #define VDS_POS_LENGTH 7
77 #define UDF_DEFAULT_BLOCKSIZE 2048
79 static char error_buf[1024];
81 /* These are the "meat" - everything else is stuffing */
82 static int udf_fill_super(struct super_block *, void *, int);
83 static void udf_put_super(struct super_block *);
84 static int udf_sync_fs(struct super_block *, int);
85 static int udf_remount_fs(struct super_block *, int *, char *);
86 static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
87 static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
88 struct kernel_lb_addr *);
89 static void udf_load_fileset(struct super_block *, struct buffer_head *,
90 struct kernel_lb_addr *);
91 static void udf_open_lvid(struct super_block *);
92 static void udf_close_lvid(struct super_block *);
93 static unsigned int udf_count_free(struct super_block *);
94 static int udf_statfs(struct dentry *, struct kstatfs *);
95 static int udf_show_options(struct seq_file *, struct vfsmount *);
96 static void udf_error(struct super_block *sb, const char *function,
97 const char *fmt, ...);
99 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
101 struct logicalVolIntegrityDesc *lvid =
102 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
103 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
104 __u32 offset = number_of_partitions * 2 *
105 sizeof(uint32_t)/sizeof(uint8_t);
106 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
109 /* UDF filesystem type */
110 static struct dentry *udf_mount(struct file_system_type *fs_type,
111 int flags, const char *dev_name, void *data)
113 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
116 static struct file_system_type udf_fstype = {
117 .owner = THIS_MODULE,
118 .name = "udf",
119 .mount = udf_mount,
120 .kill_sb = kill_block_super,
121 .fs_flags = FS_REQUIRES_DEV,
124 static struct kmem_cache *udf_inode_cachep;
126 static struct inode *udf_alloc_inode(struct super_block *sb)
128 struct udf_inode_info *ei;
129 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
130 if (!ei)
131 return NULL;
133 ei->i_unique = 0;
134 ei->i_lenExtents = 0;
135 ei->i_next_alloc_block = 0;
136 ei->i_next_alloc_goal = 0;
137 ei->i_strat4096 = 0;
139 return &ei->vfs_inode;
142 static void udf_destroy_inode(struct inode *inode)
144 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
147 static void init_once(void *foo)
149 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
151 ei->i_ext.i_data = NULL;
152 inode_init_once(&ei->vfs_inode);
155 static int init_inodecache(void)
157 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
158 sizeof(struct udf_inode_info),
159 0, (SLAB_RECLAIM_ACCOUNT |
160 SLAB_MEM_SPREAD),
161 init_once);
162 if (!udf_inode_cachep)
163 return -ENOMEM;
164 return 0;
167 static void destroy_inodecache(void)
169 kmem_cache_destroy(udf_inode_cachep);
172 /* Superblock operations */
173 static const struct super_operations udf_sb_ops = {
174 .alloc_inode = udf_alloc_inode,
175 .destroy_inode = udf_destroy_inode,
176 .write_inode = udf_write_inode,
177 .evict_inode = udf_evict_inode,
178 .put_super = udf_put_super,
179 .sync_fs = udf_sync_fs,
180 .statfs = udf_statfs,
181 .remount_fs = udf_remount_fs,
182 .show_options = udf_show_options,
185 struct udf_options {
186 unsigned char novrs;
187 unsigned int blocksize;
188 unsigned int session;
189 unsigned int lastblock;
190 unsigned int anchor;
191 unsigned int volume;
192 unsigned short partition;
193 unsigned int fileset;
194 unsigned int rootdir;
195 unsigned int flags;
196 mode_t umask;
197 gid_t gid;
198 uid_t uid;
199 mode_t fmode;
200 mode_t dmode;
201 struct nls_table *nls_map;
204 static int __init init_udf_fs(void)
206 int err;
208 err = init_inodecache();
209 if (err)
210 goto out1;
211 err = register_filesystem(&udf_fstype);
212 if (err)
213 goto out;
215 return 0;
217 out:
218 destroy_inodecache();
220 out1:
221 return err;
224 static void __exit exit_udf_fs(void)
226 unregister_filesystem(&udf_fstype);
227 destroy_inodecache();
230 module_init(init_udf_fs)
231 module_exit(exit_udf_fs)
233 static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
235 struct udf_sb_info *sbi = UDF_SB(sb);
237 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
238 GFP_KERNEL);
239 if (!sbi->s_partmaps) {
240 udf_error(sb, __func__,
241 "Unable to allocate space for %d partition maps",
242 count);
243 sbi->s_partitions = 0;
244 return -ENOMEM;
247 sbi->s_partitions = count;
248 return 0;
251 static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
253 struct super_block *sb = mnt->mnt_sb;
254 struct udf_sb_info *sbi = UDF_SB(sb);
256 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
257 seq_puts(seq, ",nostrict");
258 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
259 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
260 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
261 seq_puts(seq, ",unhide");
262 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
263 seq_puts(seq, ",undelete");
264 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
265 seq_puts(seq, ",noadinicb");
266 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
267 seq_puts(seq, ",shortad");
268 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
269 seq_puts(seq, ",uid=forget");
270 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
271 seq_puts(seq, ",uid=ignore");
272 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
273 seq_puts(seq, ",gid=forget");
274 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
275 seq_puts(seq, ",gid=ignore");
276 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
277 seq_printf(seq, ",uid=%u", sbi->s_uid);
278 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
279 seq_printf(seq, ",gid=%u", sbi->s_gid);
280 if (sbi->s_umask != 0)
281 seq_printf(seq, ",umask=%o", sbi->s_umask);
282 if (sbi->s_fmode != UDF_INVALID_MODE)
283 seq_printf(seq, ",mode=%o", sbi->s_fmode);
284 if (sbi->s_dmode != UDF_INVALID_MODE)
285 seq_printf(seq, ",dmode=%o", sbi->s_dmode);
286 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
287 seq_printf(seq, ",session=%u", sbi->s_session);
288 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
289 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
290 if (sbi->s_anchor != 0)
291 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
293 * volume, partition, fileset and rootdir seem to be ignored
294 * currently
296 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
297 seq_puts(seq, ",utf8");
298 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
299 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
301 return 0;
305 * udf_parse_options
307 * PURPOSE
308 * Parse mount options.
310 * DESCRIPTION
311 * The following mount options are supported:
313 * gid= Set the default group.
314 * umask= Set the default umask.
315 * mode= Set the default file permissions.
316 * dmode= Set the default directory permissions.
317 * uid= Set the default user.
318 * bs= Set the block size.
319 * unhide Show otherwise hidden files.
320 * undelete Show deleted files in lists.
321 * adinicb Embed data in the inode (default)
322 * noadinicb Don't embed data in the inode
323 * shortad Use short ad's
324 * longad Use long ad's (default)
325 * nostrict Unset strict conformance
326 * iocharset= Set the NLS character set
328 * The remaining are for debugging and disaster recovery:
330 * novrs Skip volume sequence recognition
332 * The following expect a offset from 0.
334 * session= Set the CDROM session (default= last session)
335 * anchor= Override standard anchor location. (default= 256)
336 * volume= Override the VolumeDesc location. (unused)
337 * partition= Override the PartitionDesc location. (unused)
338 * lastblock= Set the last block of the filesystem/
340 * The following expect a offset from the partition root.
342 * fileset= Override the fileset block location. (unused)
343 * rootdir= Override the root directory location. (unused)
344 * WARNING: overriding the rootdir to a non-directory may
345 * yield highly unpredictable results.
347 * PRE-CONDITIONS
348 * options Pointer to mount options string.
349 * uopts Pointer to mount options variable.
351 * POST-CONDITIONS
352 * <return> 1 Mount options parsed okay.
353 * <return> 0 Error parsing mount options.
355 * HISTORY
356 * July 1, 1997 - Andrew E. Mileski
357 * Written, tested, and released.
360 enum {
361 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
362 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
363 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
364 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
365 Opt_rootdir, Opt_utf8, Opt_iocharset,
366 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
367 Opt_fmode, Opt_dmode
370 static const match_table_t tokens = {
371 {Opt_novrs, "novrs"},
372 {Opt_nostrict, "nostrict"},
373 {Opt_bs, "bs=%u"},
374 {Opt_unhide, "unhide"},
375 {Opt_undelete, "undelete"},
376 {Opt_noadinicb, "noadinicb"},
377 {Opt_adinicb, "adinicb"},
378 {Opt_shortad, "shortad"},
379 {Opt_longad, "longad"},
380 {Opt_uforget, "uid=forget"},
381 {Opt_uignore, "uid=ignore"},
382 {Opt_gforget, "gid=forget"},
383 {Opt_gignore, "gid=ignore"},
384 {Opt_gid, "gid=%u"},
385 {Opt_uid, "uid=%u"},
386 {Opt_umask, "umask=%o"},
387 {Opt_session, "session=%u"},
388 {Opt_lastblock, "lastblock=%u"},
389 {Opt_anchor, "anchor=%u"},
390 {Opt_volume, "volume=%u"},
391 {Opt_partition, "partition=%u"},
392 {Opt_fileset, "fileset=%u"},
393 {Opt_rootdir, "rootdir=%u"},
394 {Opt_utf8, "utf8"},
395 {Opt_iocharset, "iocharset=%s"},
396 {Opt_fmode, "mode=%o"},
397 {Opt_dmode, "dmode=%o"},
398 {Opt_err, NULL}
401 static int udf_parse_options(char *options, struct udf_options *uopt,
402 bool remount)
404 char *p;
405 int option;
407 uopt->novrs = 0;
408 uopt->partition = 0xFFFF;
409 uopt->session = 0xFFFFFFFF;
410 uopt->lastblock = 0;
411 uopt->anchor = 0;
412 uopt->volume = 0xFFFFFFFF;
413 uopt->rootdir = 0xFFFFFFFF;
414 uopt->fileset = 0xFFFFFFFF;
415 uopt->nls_map = NULL;
417 if (!options)
418 return 1;
420 while ((p = strsep(&options, ",")) != NULL) {
421 substring_t args[MAX_OPT_ARGS];
422 int token;
423 if (!*p)
424 continue;
426 token = match_token(p, tokens, args);
427 switch (token) {
428 case Opt_novrs:
429 uopt->novrs = 1;
430 break;
431 case Opt_bs:
432 if (match_int(&args[0], &option))
433 return 0;
434 uopt->blocksize = option;
435 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
436 break;
437 case Opt_unhide:
438 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
439 break;
440 case Opt_undelete:
441 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
442 break;
443 case Opt_noadinicb:
444 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
445 break;
446 case Opt_adinicb:
447 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
448 break;
449 case Opt_shortad:
450 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
451 break;
452 case Opt_longad:
453 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
454 break;
455 case Opt_gid:
456 if (match_int(args, &option))
457 return 0;
458 uopt->gid = option;
459 uopt->flags |= (1 << UDF_FLAG_GID_SET);
460 break;
461 case Opt_uid:
462 if (match_int(args, &option))
463 return 0;
464 uopt->uid = option;
465 uopt->flags |= (1 << UDF_FLAG_UID_SET);
466 break;
467 case Opt_umask:
468 if (match_octal(args, &option))
469 return 0;
470 uopt->umask = option;
471 break;
472 case Opt_nostrict:
473 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
474 break;
475 case Opt_session:
476 if (match_int(args, &option))
477 return 0;
478 uopt->session = option;
479 if (!remount)
480 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
481 break;
482 case Opt_lastblock:
483 if (match_int(args, &option))
484 return 0;
485 uopt->lastblock = option;
486 if (!remount)
487 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
488 break;
489 case Opt_anchor:
490 if (match_int(args, &option))
491 return 0;
492 uopt->anchor = option;
493 break;
494 case Opt_volume:
495 if (match_int(args, &option))
496 return 0;
497 uopt->volume = option;
498 break;
499 case Opt_partition:
500 if (match_int(args, &option))
501 return 0;
502 uopt->partition = option;
503 break;
504 case Opt_fileset:
505 if (match_int(args, &option))
506 return 0;
507 uopt->fileset = option;
508 break;
509 case Opt_rootdir:
510 if (match_int(args, &option))
511 return 0;
512 uopt->rootdir = option;
513 break;
514 case Opt_utf8:
515 uopt->flags |= (1 << UDF_FLAG_UTF8);
516 break;
517 #ifdef CONFIG_UDF_NLS
518 case Opt_iocharset:
519 uopt->nls_map = load_nls(args[0].from);
520 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
521 break;
522 #endif
523 case Opt_uignore:
524 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
525 break;
526 case Opt_uforget:
527 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
528 break;
529 case Opt_gignore:
530 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
531 break;
532 case Opt_gforget:
533 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
534 break;
535 case Opt_fmode:
536 if (match_octal(args, &option))
537 return 0;
538 uopt->fmode = option & 0777;
539 break;
540 case Opt_dmode:
541 if (match_octal(args, &option))
542 return 0;
543 uopt->dmode = option & 0777;
544 break;
545 default:
546 printk(KERN_ERR "udf: bad mount option \"%s\" "
547 "or missing value\n", p);
548 return 0;
551 return 1;
554 static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
556 struct udf_options uopt;
557 struct udf_sb_info *sbi = UDF_SB(sb);
558 int error = 0;
560 uopt.flags = sbi->s_flags;
561 uopt.uid = sbi->s_uid;
562 uopt.gid = sbi->s_gid;
563 uopt.umask = sbi->s_umask;
564 uopt.fmode = sbi->s_fmode;
565 uopt.dmode = sbi->s_dmode;
567 if (!udf_parse_options(options, &uopt, true))
568 return -EINVAL;
570 lock_kernel();
571 sbi->s_flags = uopt.flags;
572 sbi->s_uid = uopt.uid;
573 sbi->s_gid = uopt.gid;
574 sbi->s_umask = uopt.umask;
575 sbi->s_fmode = uopt.fmode;
576 sbi->s_dmode = uopt.dmode;
578 if (sbi->s_lvid_bh) {
579 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
580 if (write_rev > UDF_MAX_WRITE_VERSION)
581 *flags |= MS_RDONLY;
584 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
585 goto out_unlock;
587 if (*flags & MS_RDONLY)
588 udf_close_lvid(sb);
589 else
590 udf_open_lvid(sb);
592 out_unlock:
593 unlock_kernel();
594 return error;
597 /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
598 /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
599 static loff_t udf_check_vsd(struct super_block *sb)
601 struct volStructDesc *vsd = NULL;
602 loff_t sector = 32768;
603 int sectorsize;
604 struct buffer_head *bh = NULL;
605 int nsr02 = 0;
606 int nsr03 = 0;
607 struct udf_sb_info *sbi;
609 sbi = UDF_SB(sb);
610 if (sb->s_blocksize < sizeof(struct volStructDesc))
611 sectorsize = sizeof(struct volStructDesc);
612 else
613 sectorsize = sb->s_blocksize;
615 sector += (sbi->s_session << sb->s_blocksize_bits);
617 udf_debug("Starting at sector %u (%ld byte sectors)\n",
618 (unsigned int)(sector >> sb->s_blocksize_bits),
619 sb->s_blocksize);
620 /* Process the sequence (if applicable) */
621 for (; !nsr02 && !nsr03; sector += sectorsize) {
622 /* Read a block */
623 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
624 if (!bh)
625 break;
627 /* Look for ISO descriptors */
628 vsd = (struct volStructDesc *)(bh->b_data +
629 (sector & (sb->s_blocksize - 1)));
631 if (vsd->stdIdent[0] == 0) {
632 brelse(bh);
633 break;
634 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
635 VSD_STD_ID_LEN)) {
636 switch (vsd->structType) {
637 case 0:
638 udf_debug("ISO9660 Boot Record found\n");
639 break;
640 case 1:
641 udf_debug("ISO9660 Primary Volume Descriptor "
642 "found\n");
643 break;
644 case 2:
645 udf_debug("ISO9660 Supplementary Volume "
646 "Descriptor found\n");
647 break;
648 case 3:
649 udf_debug("ISO9660 Volume Partition Descriptor "
650 "found\n");
651 break;
652 case 255:
653 udf_debug("ISO9660 Volume Descriptor Set "
654 "Terminator found\n");
655 break;
656 default:
657 udf_debug("ISO9660 VRS (%u) found\n",
658 vsd->structType);
659 break;
661 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
662 VSD_STD_ID_LEN))
663 ; /* nothing */
664 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
665 VSD_STD_ID_LEN)) {
666 brelse(bh);
667 break;
668 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
669 VSD_STD_ID_LEN))
670 nsr02 = sector;
671 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
672 VSD_STD_ID_LEN))
673 nsr03 = sector;
674 brelse(bh);
677 if (nsr03)
678 return nsr03;
679 else if (nsr02)
680 return nsr02;
681 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
682 return -1;
683 else
684 return 0;
687 static int udf_find_fileset(struct super_block *sb,
688 struct kernel_lb_addr *fileset,
689 struct kernel_lb_addr *root)
691 struct buffer_head *bh = NULL;
692 long lastblock;
693 uint16_t ident;
694 struct udf_sb_info *sbi;
696 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
697 fileset->partitionReferenceNum != 0xFFFF) {
698 bh = udf_read_ptagged(sb, fileset, 0, &ident);
700 if (!bh) {
701 return 1;
702 } else if (ident != TAG_IDENT_FSD) {
703 brelse(bh);
704 return 1;
709 sbi = UDF_SB(sb);
710 if (!bh) {
711 /* Search backwards through the partitions */
712 struct kernel_lb_addr newfileset;
714 /* --> cvg: FIXME - is it reasonable? */
715 return 1;
717 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
718 (newfileset.partitionReferenceNum != 0xFFFF &&
719 fileset->logicalBlockNum == 0xFFFFFFFF &&
720 fileset->partitionReferenceNum == 0xFFFF);
721 newfileset.partitionReferenceNum--) {
722 lastblock = sbi->s_partmaps
723 [newfileset.partitionReferenceNum]
724 .s_partition_len;
725 newfileset.logicalBlockNum = 0;
727 do {
728 bh = udf_read_ptagged(sb, &newfileset, 0,
729 &ident);
730 if (!bh) {
731 newfileset.logicalBlockNum++;
732 continue;
735 switch (ident) {
736 case TAG_IDENT_SBD:
738 struct spaceBitmapDesc *sp;
739 sp = (struct spaceBitmapDesc *)
740 bh->b_data;
741 newfileset.logicalBlockNum += 1 +
742 ((le32_to_cpu(sp->numOfBytes) +
743 sizeof(struct spaceBitmapDesc)
744 - 1) >> sb->s_blocksize_bits);
745 brelse(bh);
746 break;
748 case TAG_IDENT_FSD:
749 *fileset = newfileset;
750 break;
751 default:
752 newfileset.logicalBlockNum++;
753 brelse(bh);
754 bh = NULL;
755 break;
757 } while (newfileset.logicalBlockNum < lastblock &&
758 fileset->logicalBlockNum == 0xFFFFFFFF &&
759 fileset->partitionReferenceNum == 0xFFFF);
763 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
764 fileset->partitionReferenceNum != 0xFFFF) && bh) {
765 udf_debug("Fileset at block=%d, partition=%d\n",
766 fileset->logicalBlockNum,
767 fileset->partitionReferenceNum);
769 sbi->s_partition = fileset->partitionReferenceNum;
770 udf_load_fileset(sb, bh, root);
771 brelse(bh);
772 return 0;
774 return 1;
777 static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
779 struct primaryVolDesc *pvoldesc;
780 struct ustr *instr, *outstr;
781 struct buffer_head *bh;
782 uint16_t ident;
783 int ret = 1;
785 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
786 if (!instr)
787 return 1;
789 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
790 if (!outstr)
791 goto out1;
793 bh = udf_read_tagged(sb, block, block, &ident);
794 if (!bh)
795 goto out2;
797 BUG_ON(ident != TAG_IDENT_PVD);
799 pvoldesc = (struct primaryVolDesc *)bh->b_data;
801 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
802 pvoldesc->recordingDateAndTime)) {
803 #ifdef UDFFS_DEBUG
804 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
805 udf_debug("recording time %04u/%02u/%02u"
806 " %02u:%02u (%x)\n",
807 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
808 ts->minute, le16_to_cpu(ts->typeAndTimezone));
809 #endif
812 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
813 if (udf_CS0toUTF8(outstr, instr)) {
814 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
815 outstr->u_len > 31 ? 31 : outstr->u_len);
816 udf_debug("volIdent[] = '%s'\n",
817 UDF_SB(sb)->s_volume_ident);
820 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
821 if (udf_CS0toUTF8(outstr, instr))
822 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
824 brelse(bh);
825 ret = 0;
826 out2:
827 kfree(outstr);
828 out1:
829 kfree(instr);
830 return ret;
833 static int udf_load_metadata_files(struct super_block *sb, int partition)
835 struct udf_sb_info *sbi = UDF_SB(sb);
836 struct udf_part_map *map;
837 struct udf_meta_data *mdata;
838 struct kernel_lb_addr addr;
839 int fe_error = 0;
841 map = &sbi->s_partmaps[partition];
842 mdata = &map->s_type_specific.s_metadata;
844 /* metadata address */
845 addr.logicalBlockNum = mdata->s_meta_file_loc;
846 addr.partitionReferenceNum = map->s_partition_num;
848 udf_debug("Metadata file location: block = %d part = %d\n",
849 addr.logicalBlockNum, addr.partitionReferenceNum);
851 mdata->s_metadata_fe = udf_iget(sb, &addr);
853 if (mdata->s_metadata_fe == NULL) {
854 udf_warning(sb, __func__, "metadata inode efe not found, "
855 "will try mirror inode.");
856 fe_error = 1;
857 } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type !=
858 ICBTAG_FLAG_AD_SHORT) {
859 udf_warning(sb, __func__, "metadata inode efe does not have "
860 "short allocation descriptors!");
861 fe_error = 1;
862 iput(mdata->s_metadata_fe);
863 mdata->s_metadata_fe = NULL;
866 /* mirror file entry */
867 addr.logicalBlockNum = mdata->s_mirror_file_loc;
868 addr.partitionReferenceNum = map->s_partition_num;
870 udf_debug("Mirror metadata file location: block = %d part = %d\n",
871 addr.logicalBlockNum, addr.partitionReferenceNum);
873 mdata->s_mirror_fe = udf_iget(sb, &addr);
875 if (mdata->s_mirror_fe == NULL) {
876 if (fe_error) {
877 udf_error(sb, __func__, "mirror inode efe not found "
878 "and metadata inode is missing too, exiting...");
879 goto error_exit;
880 } else
881 udf_warning(sb, __func__, "mirror inode efe not found,"
882 " but metadata inode is OK");
883 } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type !=
884 ICBTAG_FLAG_AD_SHORT) {
885 udf_warning(sb, __func__, "mirror inode efe does not have "
886 "short allocation descriptors!");
887 iput(mdata->s_mirror_fe);
888 mdata->s_mirror_fe = NULL;
889 if (fe_error)
890 goto error_exit;
894 * bitmap file entry
895 * Note:
896 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
898 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
899 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
900 addr.partitionReferenceNum = map->s_partition_num;
902 udf_debug("Bitmap file location: block = %d part = %d\n",
903 addr.logicalBlockNum, addr.partitionReferenceNum);
905 mdata->s_bitmap_fe = udf_iget(sb, &addr);
907 if (mdata->s_bitmap_fe == NULL) {
908 if (sb->s_flags & MS_RDONLY)
909 udf_warning(sb, __func__, "bitmap inode efe "
910 "not found but it's ok since the disc"
911 " is mounted read-only");
912 else {
913 udf_error(sb, __func__, "bitmap inode efe not "
914 "found and attempted read-write mount");
915 goto error_exit;
920 udf_debug("udf_load_metadata_files Ok\n");
922 return 0;
924 error_exit:
925 return 1;
928 static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
929 struct kernel_lb_addr *root)
931 struct fileSetDesc *fset;
933 fset = (struct fileSetDesc *)bh->b_data;
935 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
937 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
939 udf_debug("Rootdir at block=%d, partition=%d\n",
940 root->logicalBlockNum, root->partitionReferenceNum);
943 int udf_compute_nr_groups(struct super_block *sb, u32 partition)
945 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
946 return DIV_ROUND_UP(map->s_partition_len +
947 (sizeof(struct spaceBitmapDesc) << 3),
948 sb->s_blocksize * 8);
951 static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
953 struct udf_bitmap *bitmap;
954 int nr_groups;
955 int size;
957 nr_groups = udf_compute_nr_groups(sb, index);
958 size = sizeof(struct udf_bitmap) +
959 (sizeof(struct buffer_head *) * nr_groups);
961 if (size <= PAGE_SIZE)
962 bitmap = kmalloc(size, GFP_KERNEL);
963 else
964 bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
966 if (bitmap == NULL) {
967 udf_error(sb, __func__,
968 "Unable to allocate space for bitmap "
969 "and %d buffer_head pointers", nr_groups);
970 return NULL;
973 memset(bitmap, 0x00, size);
974 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
975 bitmap->s_nr_groups = nr_groups;
976 return bitmap;
979 static int udf_fill_partdesc_info(struct super_block *sb,
980 struct partitionDesc *p, int p_index)
982 struct udf_part_map *map;
983 struct udf_sb_info *sbi = UDF_SB(sb);
984 struct partitionHeaderDesc *phd;
986 map = &sbi->s_partmaps[p_index];
988 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
989 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
991 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
992 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
993 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
994 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
995 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
996 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
997 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
998 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1000 udf_debug("Partition (%d type %x) starts at physical %d, "
1001 "block length %d\n", p_index,
1002 map->s_partition_type, map->s_partition_root,
1003 map->s_partition_len);
1005 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1006 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1007 return 0;
1009 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1010 if (phd->unallocSpaceTable.extLength) {
1011 struct kernel_lb_addr loc = {
1012 .logicalBlockNum = le32_to_cpu(
1013 phd->unallocSpaceTable.extPosition),
1014 .partitionReferenceNum = p_index,
1017 map->s_uspace.s_table = udf_iget(sb, &loc);
1018 if (!map->s_uspace.s_table) {
1019 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1020 p_index);
1021 return 1;
1023 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1024 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1025 p_index, map->s_uspace.s_table->i_ino);
1028 if (phd->unallocSpaceBitmap.extLength) {
1029 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1030 if (!bitmap)
1031 return 1;
1032 map->s_uspace.s_bitmap = bitmap;
1033 bitmap->s_extLength = le32_to_cpu(
1034 phd->unallocSpaceBitmap.extLength);
1035 bitmap->s_extPosition = le32_to_cpu(
1036 phd->unallocSpaceBitmap.extPosition);
1037 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1038 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
1039 bitmap->s_extPosition);
1042 if (phd->partitionIntegrityTable.extLength)
1043 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1045 if (phd->freedSpaceTable.extLength) {
1046 struct kernel_lb_addr loc = {
1047 .logicalBlockNum = le32_to_cpu(
1048 phd->freedSpaceTable.extPosition),
1049 .partitionReferenceNum = p_index,
1052 map->s_fspace.s_table = udf_iget(sb, &loc);
1053 if (!map->s_fspace.s_table) {
1054 udf_debug("cannot load freedSpaceTable (part %d)\n",
1055 p_index);
1056 return 1;
1059 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1060 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1061 p_index, map->s_fspace.s_table->i_ino);
1064 if (phd->freedSpaceBitmap.extLength) {
1065 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1066 if (!bitmap)
1067 return 1;
1068 map->s_fspace.s_bitmap = bitmap;
1069 bitmap->s_extLength = le32_to_cpu(
1070 phd->freedSpaceBitmap.extLength);
1071 bitmap->s_extPosition = le32_to_cpu(
1072 phd->freedSpaceBitmap.extPosition);
1073 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1074 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
1075 bitmap->s_extPosition);
1077 return 0;
1080 static void udf_find_vat_block(struct super_block *sb, int p_index,
1081 int type1_index, sector_t start_block)
1083 struct udf_sb_info *sbi = UDF_SB(sb);
1084 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1085 sector_t vat_block;
1086 struct kernel_lb_addr ino;
1089 * VAT file entry is in the last recorded block. Some broken disks have
1090 * it a few blocks before so try a bit harder...
1092 ino.partitionReferenceNum = type1_index;
1093 for (vat_block = start_block;
1094 vat_block >= map->s_partition_root &&
1095 vat_block >= start_block - 3 &&
1096 !sbi->s_vat_inode; vat_block--) {
1097 ino.logicalBlockNum = vat_block - map->s_partition_root;
1098 sbi->s_vat_inode = udf_iget(sb, &ino);
1102 static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1104 struct udf_sb_info *sbi = UDF_SB(sb);
1105 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1106 struct buffer_head *bh = NULL;
1107 struct udf_inode_info *vati;
1108 uint32_t pos;
1109 struct virtualAllocationTable20 *vat20;
1110 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
1112 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
1113 if (!sbi->s_vat_inode &&
1114 sbi->s_last_block != blocks - 1) {
1115 printk(KERN_NOTICE "UDF-fs: Failed to read VAT inode from the"
1116 " last recorded block (%lu), retrying with the last "
1117 "block of the device (%lu).\n",
1118 (unsigned long)sbi->s_last_block,
1119 (unsigned long)blocks - 1);
1120 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
1122 if (!sbi->s_vat_inode)
1123 return 1;
1125 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1126 map->s_type_specific.s_virtual.s_start_offset = 0;
1127 map->s_type_specific.s_virtual.s_num_entries =
1128 (sbi->s_vat_inode->i_size - 36) >> 2;
1129 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
1130 vati = UDF_I(sbi->s_vat_inode);
1131 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1132 pos = udf_block_map(sbi->s_vat_inode, 0);
1133 bh = sb_bread(sb, pos);
1134 if (!bh)
1135 return 1;
1136 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1137 } else {
1138 vat20 = (struct virtualAllocationTable20 *)
1139 vati->i_ext.i_data;
1142 map->s_type_specific.s_virtual.s_start_offset =
1143 le16_to_cpu(vat20->lengthHeader);
1144 map->s_type_specific.s_virtual.s_num_entries =
1145 (sbi->s_vat_inode->i_size -
1146 map->s_type_specific.s_virtual.
1147 s_start_offset) >> 2;
1148 brelse(bh);
1150 return 0;
1153 static int udf_load_partdesc(struct super_block *sb, sector_t block)
1155 struct buffer_head *bh;
1156 struct partitionDesc *p;
1157 struct udf_part_map *map;
1158 struct udf_sb_info *sbi = UDF_SB(sb);
1159 int i, type1_idx;
1160 uint16_t partitionNumber;
1161 uint16_t ident;
1162 int ret = 0;
1164 bh = udf_read_tagged(sb, block, block, &ident);
1165 if (!bh)
1166 return 1;
1167 if (ident != TAG_IDENT_PD)
1168 goto out_bh;
1170 p = (struct partitionDesc *)bh->b_data;
1171 partitionNumber = le16_to_cpu(p->partitionNumber);
1173 /* First scan for TYPE1, SPARABLE and METADATA partitions */
1174 for (i = 0; i < sbi->s_partitions; i++) {
1175 map = &sbi->s_partmaps[i];
1176 udf_debug("Searching map: (%d == %d)\n",
1177 map->s_partition_num, partitionNumber);
1178 if (map->s_partition_num == partitionNumber &&
1179 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1180 map->s_partition_type == UDF_SPARABLE_MAP15))
1181 break;
1184 if (i >= sbi->s_partitions) {
1185 udf_debug("Partition (%d) not found in partition map\n",
1186 partitionNumber);
1187 goto out_bh;
1190 ret = udf_fill_partdesc_info(sb, p, i);
1193 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1194 * PHYSICAL partitions are already set up
1196 type1_idx = i;
1197 for (i = 0; i < sbi->s_partitions; i++) {
1198 map = &sbi->s_partmaps[i];
1200 if (map->s_partition_num == partitionNumber &&
1201 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1202 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1203 map->s_partition_type == UDF_METADATA_MAP25))
1204 break;
1207 if (i >= sbi->s_partitions)
1208 goto out_bh;
1210 ret = udf_fill_partdesc_info(sb, p, i);
1211 if (ret)
1212 goto out_bh;
1214 if (map->s_partition_type == UDF_METADATA_MAP25) {
1215 ret = udf_load_metadata_files(sb, i);
1216 if (ret) {
1217 printk(KERN_ERR "UDF-fs: error loading MetaData "
1218 "partition map %d\n", i);
1219 goto out_bh;
1221 } else {
1222 ret = udf_load_vat(sb, i, type1_idx);
1223 if (ret)
1224 goto out_bh;
1226 * Mark filesystem read-only if we have a partition with
1227 * virtual map since we don't handle writing to it (we
1228 * overwrite blocks instead of relocating them).
1230 sb->s_flags |= MS_RDONLY;
1231 printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only "
1232 "because writing to pseudooverwrite partition is "
1233 "not implemented.\n");
1235 out_bh:
1236 /* In case loading failed, we handle cleanup in udf_fill_super */
1237 brelse(bh);
1238 return ret;
1241 static int udf_load_logicalvol(struct super_block *sb, sector_t block,
1242 struct kernel_lb_addr *fileset)
1244 struct logicalVolDesc *lvd;
1245 int i, j, offset;
1246 uint8_t type;
1247 struct udf_sb_info *sbi = UDF_SB(sb);
1248 struct genericPartitionMap *gpm;
1249 uint16_t ident;
1250 struct buffer_head *bh;
1251 int ret = 0;
1253 bh = udf_read_tagged(sb, block, block, &ident);
1254 if (!bh)
1255 return 1;
1256 BUG_ON(ident != TAG_IDENT_LVD);
1257 lvd = (struct logicalVolDesc *)bh->b_data;
1259 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1260 if (i != 0) {
1261 ret = i;
1262 goto out_bh;
1265 for (i = 0, offset = 0;
1266 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
1267 i++, offset += gpm->partitionMapLength) {
1268 struct udf_part_map *map = &sbi->s_partmaps[i];
1269 gpm = (struct genericPartitionMap *)
1270 &(lvd->partitionMaps[offset]);
1271 type = gpm->partitionMapType;
1272 if (type == 1) {
1273 struct genericPartitionMap1 *gpm1 =
1274 (struct genericPartitionMap1 *)gpm;
1275 map->s_partition_type = UDF_TYPE1_MAP15;
1276 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1277 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1278 map->s_partition_func = NULL;
1279 } else if (type == 2) {
1280 struct udfPartitionMap2 *upm2 =
1281 (struct udfPartitionMap2 *)gpm;
1282 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1283 strlen(UDF_ID_VIRTUAL))) {
1284 u16 suf =
1285 le16_to_cpu(((__le16 *)upm2->partIdent.
1286 identSuffix)[0]);
1287 if (suf < 0x0200) {
1288 map->s_partition_type =
1289 UDF_VIRTUAL_MAP15;
1290 map->s_partition_func =
1291 udf_get_pblock_virt15;
1292 } else {
1293 map->s_partition_type =
1294 UDF_VIRTUAL_MAP20;
1295 map->s_partition_func =
1296 udf_get_pblock_virt20;
1298 } else if (!strncmp(upm2->partIdent.ident,
1299 UDF_ID_SPARABLE,
1300 strlen(UDF_ID_SPARABLE))) {
1301 uint32_t loc;
1302 struct sparingTable *st;
1303 struct sparablePartitionMap *spm =
1304 (struct sparablePartitionMap *)gpm;
1306 map->s_partition_type = UDF_SPARABLE_MAP15;
1307 map->s_type_specific.s_sparing.s_packet_len =
1308 le16_to_cpu(spm->packetLength);
1309 for (j = 0; j < spm->numSparingTables; j++) {
1310 struct buffer_head *bh2;
1312 loc = le32_to_cpu(
1313 spm->locSparingTable[j]);
1314 bh2 = udf_read_tagged(sb, loc, loc,
1315 &ident);
1316 map->s_type_specific.s_sparing.
1317 s_spar_map[j] = bh2;
1319 if (bh2 == NULL)
1320 continue;
1322 st = (struct sparingTable *)bh2->b_data;
1323 if (ident != 0 || strncmp(
1324 st->sparingIdent.ident,
1325 UDF_ID_SPARING,
1326 strlen(UDF_ID_SPARING))) {
1327 brelse(bh2);
1328 map->s_type_specific.s_sparing.
1329 s_spar_map[j] = NULL;
1332 map->s_partition_func = udf_get_pblock_spar15;
1333 } else if (!strncmp(upm2->partIdent.ident,
1334 UDF_ID_METADATA,
1335 strlen(UDF_ID_METADATA))) {
1336 struct udf_meta_data *mdata =
1337 &map->s_type_specific.s_metadata;
1338 struct metadataPartitionMap *mdm =
1339 (struct metadataPartitionMap *)
1340 &(lvd->partitionMaps[offset]);
1341 udf_debug("Parsing Logical vol part %d "
1342 "type %d id=%s\n", i, type,
1343 UDF_ID_METADATA);
1345 map->s_partition_type = UDF_METADATA_MAP25;
1346 map->s_partition_func = udf_get_pblock_meta25;
1348 mdata->s_meta_file_loc =
1349 le32_to_cpu(mdm->metadataFileLoc);
1350 mdata->s_mirror_file_loc =
1351 le32_to_cpu(mdm->metadataMirrorFileLoc);
1352 mdata->s_bitmap_file_loc =
1353 le32_to_cpu(mdm->metadataBitmapFileLoc);
1354 mdata->s_alloc_unit_size =
1355 le32_to_cpu(mdm->allocUnitSize);
1356 mdata->s_align_unit_size =
1357 le16_to_cpu(mdm->alignUnitSize);
1358 mdata->s_dup_md_flag =
1359 mdm->flags & 0x01;
1361 udf_debug("Metadata Ident suffix=0x%x\n",
1362 (le16_to_cpu(
1363 ((__le16 *)
1364 mdm->partIdent.identSuffix)[0])));
1365 udf_debug("Metadata part num=%d\n",
1366 le16_to_cpu(mdm->partitionNum));
1367 udf_debug("Metadata part alloc unit size=%d\n",
1368 le32_to_cpu(mdm->allocUnitSize));
1369 udf_debug("Metadata file loc=%d\n",
1370 le32_to_cpu(mdm->metadataFileLoc));
1371 udf_debug("Mirror file loc=%d\n",
1372 le32_to_cpu(mdm->metadataMirrorFileLoc));
1373 udf_debug("Bitmap file loc=%d\n",
1374 le32_to_cpu(mdm->metadataBitmapFileLoc));
1375 udf_debug("Duplicate Flag: %d %d\n",
1376 mdata->s_dup_md_flag, mdm->flags);
1377 } else {
1378 udf_debug("Unknown ident: %s\n",
1379 upm2->partIdent.ident);
1380 continue;
1382 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1383 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1385 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1386 i, map->s_partition_num, type,
1387 map->s_volumeseqnum);
1390 if (fileset) {
1391 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
1393 *fileset = lelb_to_cpu(la->extLocation);
1394 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1395 "partition=%d\n", fileset->logicalBlockNum,
1396 fileset->partitionReferenceNum);
1398 if (lvd->integritySeqExt.extLength)
1399 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1401 out_bh:
1402 brelse(bh);
1403 return ret;
1407 * udf_load_logicalvolint
1410 static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
1412 struct buffer_head *bh = NULL;
1413 uint16_t ident;
1414 struct udf_sb_info *sbi = UDF_SB(sb);
1415 struct logicalVolIntegrityDesc *lvid;
1417 while (loc.extLength > 0 &&
1418 (bh = udf_read_tagged(sb, loc.extLocation,
1419 loc.extLocation, &ident)) &&
1420 ident == TAG_IDENT_LVID) {
1421 sbi->s_lvid_bh = bh;
1422 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1424 if (lvid->nextIntegrityExt.extLength)
1425 udf_load_logicalvolint(sb,
1426 leea_to_cpu(lvid->nextIntegrityExt));
1428 if (sbi->s_lvid_bh != bh)
1429 brelse(bh);
1430 loc.extLength -= sb->s_blocksize;
1431 loc.extLocation++;
1433 if (sbi->s_lvid_bh != bh)
1434 brelse(bh);
1438 * udf_process_sequence
1440 * PURPOSE
1441 * Process a main/reserve volume descriptor sequence.
1443 * PRE-CONDITIONS
1444 * sb Pointer to _locked_ superblock.
1445 * block First block of first extent of the sequence.
1446 * lastblock Lastblock of first extent of the sequence.
1448 * HISTORY
1449 * July 1, 1997 - Andrew E. Mileski
1450 * Written, tested, and released.
1452 static noinline int udf_process_sequence(struct super_block *sb, long block,
1453 long lastblock, struct kernel_lb_addr *fileset)
1455 struct buffer_head *bh = NULL;
1456 struct udf_vds_record vds[VDS_POS_LENGTH];
1457 struct udf_vds_record *curr;
1458 struct generic_desc *gd;
1459 struct volDescPtr *vdp;
1460 int done = 0;
1461 uint32_t vdsn;
1462 uint16_t ident;
1463 long next_s = 0, next_e = 0;
1465 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1468 * Read the main descriptor sequence and find which descriptors
1469 * are in it.
1471 for (; (!done && block <= lastblock); block++) {
1473 bh = udf_read_tagged(sb, block, block, &ident);
1474 if (!bh) {
1475 printk(KERN_ERR "udf: Block %Lu of volume descriptor "
1476 "sequence is corrupted or we could not read "
1477 "it.\n", (unsigned long long)block);
1478 return 1;
1481 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1482 gd = (struct generic_desc *)bh->b_data;
1483 vdsn = le32_to_cpu(gd->volDescSeqNum);
1484 switch (ident) {
1485 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1486 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1487 if (vdsn >= curr->volDescSeqNum) {
1488 curr->volDescSeqNum = vdsn;
1489 curr->block = block;
1491 break;
1492 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1493 curr = &vds[VDS_POS_VOL_DESC_PTR];
1494 if (vdsn >= curr->volDescSeqNum) {
1495 curr->volDescSeqNum = vdsn;
1496 curr->block = block;
1498 vdp = (struct volDescPtr *)bh->b_data;
1499 next_s = le32_to_cpu(
1500 vdp->nextVolDescSeqExt.extLocation);
1501 next_e = le32_to_cpu(
1502 vdp->nextVolDescSeqExt.extLength);
1503 next_e = next_e >> sb->s_blocksize_bits;
1504 next_e += next_s;
1506 break;
1507 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1508 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1509 if (vdsn >= curr->volDescSeqNum) {
1510 curr->volDescSeqNum = vdsn;
1511 curr->block = block;
1513 break;
1514 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1515 curr = &vds[VDS_POS_PARTITION_DESC];
1516 if (!curr->block)
1517 curr->block = block;
1518 break;
1519 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1520 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1521 if (vdsn >= curr->volDescSeqNum) {
1522 curr->volDescSeqNum = vdsn;
1523 curr->block = block;
1525 break;
1526 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1527 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1528 if (vdsn >= curr->volDescSeqNum) {
1529 curr->volDescSeqNum = vdsn;
1530 curr->block = block;
1532 break;
1533 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1534 vds[VDS_POS_TERMINATING_DESC].block = block;
1535 if (next_e) {
1536 block = next_s;
1537 lastblock = next_e;
1538 next_s = next_e = 0;
1539 } else
1540 done = 1;
1541 break;
1543 brelse(bh);
1546 * Now read interesting descriptors again and process them
1547 * in a suitable order
1549 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1550 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n");
1551 return 1;
1553 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1554 return 1;
1556 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1557 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1558 return 1;
1560 if (vds[VDS_POS_PARTITION_DESC].block) {
1562 * We rescan the whole descriptor sequence to find
1563 * partition descriptor blocks and process them.
1565 for (block = vds[VDS_POS_PARTITION_DESC].block;
1566 block < vds[VDS_POS_TERMINATING_DESC].block;
1567 block++)
1568 if (udf_load_partdesc(sb, block))
1569 return 1;
1572 return 0;
1575 static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1576 struct kernel_lb_addr *fileset)
1578 struct anchorVolDescPtr *anchor;
1579 long main_s, main_e, reserve_s, reserve_e;
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;
1587 main_e += main_s;
1589 /* Locate the reserve sequence */
1590 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1591 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1592 reserve_e = reserve_e >> sb->s_blocksize_bits;
1593 reserve_e += reserve_s;
1595 /* Process the main & reserve sequences */
1596 /* responsible for finding the PartitionDesc(s) */
1597 if (!udf_process_sequence(sb, main_s, main_e, fileset))
1598 return 1;
1599 return !udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1603 * Check whether there is an anchor block in the given block and
1604 * load Volume Descriptor Sequence if so.
1606 static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1607 struct kernel_lb_addr *fileset)
1609 struct buffer_head *bh;
1610 uint16_t ident;
1611 int ret;
1613 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1614 udf_fixed_to_variable(block) >=
1615 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1616 return 0;
1618 bh = udf_read_tagged(sb, block, block, &ident);
1619 if (!bh)
1620 return 0;
1621 if (ident != TAG_IDENT_AVDP) {
1622 brelse(bh);
1623 return 0;
1625 ret = udf_load_sequence(sb, bh, fileset);
1626 brelse(bh);
1627 return ret;
1630 /* Search for an anchor volume descriptor pointer */
1631 static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
1632 struct kernel_lb_addr *fileset)
1634 sector_t last[6];
1635 int i;
1636 struct udf_sb_info *sbi = UDF_SB(sb);
1637 int last_count = 0;
1639 /* First try user provided anchor */
1640 if (sbi->s_anchor) {
1641 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
1642 return lastblock;
1645 * according to spec, anchor is in either:
1646 * block 256
1647 * lastblock-256
1648 * lastblock
1649 * however, if the disc isn't closed, it could be 512.
1651 if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
1652 return lastblock;
1654 * The trouble is which block is the last one. Drives often misreport
1655 * this so we try various possibilities.
1657 last[last_count++] = lastblock;
1658 if (lastblock >= 1)
1659 last[last_count++] = lastblock - 1;
1660 last[last_count++] = lastblock + 1;
1661 if (lastblock >= 2)
1662 last[last_count++] = lastblock - 2;
1663 if (lastblock >= 150)
1664 last[last_count++] = lastblock - 150;
1665 if (lastblock >= 152)
1666 last[last_count++] = lastblock - 152;
1668 for (i = 0; i < last_count; i++) {
1669 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1670 sb->s_blocksize_bits)
1671 continue;
1672 if (udf_check_anchor_block(sb, last[i], fileset))
1673 return last[i];
1674 if (last[i] < 256)
1675 continue;
1676 if (udf_check_anchor_block(sb, last[i] - 256, fileset))
1677 return last[i];
1680 /* Finally try block 512 in case media is open */
1681 if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
1682 return last[0];
1683 return 0;
1687 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1688 * area specified by it. The function expects sbi->s_lastblock to be the last
1689 * block on the media.
1691 * Return 1 if ok, 0 if not found.
1694 static int udf_find_anchor(struct super_block *sb,
1695 struct kernel_lb_addr *fileset)
1697 sector_t lastblock;
1698 struct udf_sb_info *sbi = UDF_SB(sb);
1700 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1701 if (lastblock)
1702 goto out;
1704 /* No anchor found? Try VARCONV conversion of block numbers */
1705 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1706 /* Firstly, we try to not convert number of the last block */
1707 lastblock = udf_scan_anchors(sb,
1708 udf_variable_to_fixed(sbi->s_last_block),
1709 fileset);
1710 if (lastblock)
1711 goto out;
1713 /* Secondly, we try with converted number of the last block */
1714 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1715 if (!lastblock) {
1716 /* VARCONV didn't help. Clear it. */
1717 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1718 return 0;
1720 out:
1721 sbi->s_last_block = lastblock;
1722 return 1;
1726 * Check Volume Structure Descriptor, find Anchor block and load Volume
1727 * Descriptor Sequence
1729 static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1730 int silent, struct kernel_lb_addr *fileset)
1732 struct udf_sb_info *sbi = UDF_SB(sb);
1733 loff_t nsr_off;
1735 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1736 if (!silent)
1737 printk(KERN_WARNING "UDF-fs: Bad block size\n");
1738 return 0;
1740 sbi->s_last_block = uopt->lastblock;
1741 if (!uopt->novrs) {
1742 /* Check that it is NSR02 compliant */
1743 nsr_off = udf_check_vsd(sb);
1744 if (!nsr_off) {
1745 if (!silent)
1746 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1747 return 0;
1749 if (nsr_off == -1)
1750 udf_debug("Failed to read byte 32768. Assuming open "
1751 "disc. Skipping validity check\n");
1752 if (!sbi->s_last_block)
1753 sbi->s_last_block = udf_get_last_block(sb);
1754 } else {
1755 udf_debug("Validity check skipped because of novrs option\n");
1758 /* Look for anchor block and load Volume Descriptor Sequence */
1759 sbi->s_anchor = uopt->anchor;
1760 if (!udf_find_anchor(sb, fileset)) {
1761 if (!silent)
1762 printk(KERN_WARNING "UDF-fs: No anchor found\n");
1763 return 0;
1765 return 1;
1768 static void udf_open_lvid(struct super_block *sb)
1770 struct udf_sb_info *sbi = UDF_SB(sb);
1771 struct buffer_head *bh = sbi->s_lvid_bh;
1772 struct logicalVolIntegrityDesc *lvid;
1773 struct logicalVolIntegrityDescImpUse *lvidiu;
1775 if (!bh)
1776 return;
1777 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1778 lvidiu = udf_sb_lvidiu(sbi);
1780 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1781 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1782 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1783 CURRENT_TIME);
1784 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
1786 lvid->descTag.descCRC = cpu_to_le16(
1787 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1788 le16_to_cpu(lvid->descTag.descCRCLength)));
1790 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1791 mark_buffer_dirty(bh);
1792 sbi->s_lvid_dirty = 0;
1795 static void udf_close_lvid(struct super_block *sb)
1797 struct udf_sb_info *sbi = UDF_SB(sb);
1798 struct buffer_head *bh = sbi->s_lvid_bh;
1799 struct logicalVolIntegrityDesc *lvid;
1800 struct logicalVolIntegrityDescImpUse *lvidiu;
1802 if (!bh)
1803 return;
1805 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1806 lvidiu = udf_sb_lvidiu(sbi);
1807 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1808 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1809 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1810 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1811 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1812 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1813 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1814 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1815 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1816 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1818 lvid->descTag.descCRC = cpu_to_le16(
1819 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1820 le16_to_cpu(lvid->descTag.descCRCLength)));
1822 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1823 mark_buffer_dirty(bh);
1824 sbi->s_lvid_dirty = 0;
1827 static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1829 int i;
1830 int nr_groups = bitmap->s_nr_groups;
1831 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1832 nr_groups);
1834 for (i = 0; i < nr_groups; i++)
1835 if (bitmap->s_block_bitmap[i])
1836 brelse(bitmap->s_block_bitmap[i]);
1838 if (size <= PAGE_SIZE)
1839 kfree(bitmap);
1840 else
1841 vfree(bitmap);
1844 static void udf_free_partition(struct udf_part_map *map)
1846 int i;
1847 struct udf_meta_data *mdata;
1849 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1850 iput(map->s_uspace.s_table);
1851 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1852 iput(map->s_fspace.s_table);
1853 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1854 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1855 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1856 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1857 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1858 for (i = 0; i < 4; i++)
1859 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
1860 else if (map->s_partition_type == UDF_METADATA_MAP25) {
1861 mdata = &map->s_type_specific.s_metadata;
1862 iput(mdata->s_metadata_fe);
1863 mdata->s_metadata_fe = NULL;
1865 iput(mdata->s_mirror_fe);
1866 mdata->s_mirror_fe = NULL;
1868 iput(mdata->s_bitmap_fe);
1869 mdata->s_bitmap_fe = NULL;
1873 static int udf_fill_super(struct super_block *sb, void *options, int silent)
1875 int i;
1876 int ret;
1877 struct inode *inode = NULL;
1878 struct udf_options uopt;
1879 struct kernel_lb_addr rootdir, fileset;
1880 struct udf_sb_info *sbi;
1882 lock_kernel();
1884 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1885 uopt.uid = -1;
1886 uopt.gid = -1;
1887 uopt.umask = 0;
1888 uopt.fmode = UDF_INVALID_MODE;
1889 uopt.dmode = UDF_INVALID_MODE;
1891 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1892 if (!sbi) {
1893 unlock_kernel();
1894 return -ENOMEM;
1897 sb->s_fs_info = sbi;
1899 mutex_init(&sbi->s_alloc_mutex);
1901 if (!udf_parse_options((char *)options, &uopt, false))
1902 goto error_out;
1904 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
1905 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1906 udf_error(sb, "udf_read_super",
1907 "utf8 cannot be combined with iocharset\n");
1908 goto error_out;
1910 #ifdef CONFIG_UDF_NLS
1911 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1912 uopt.nls_map = load_nls_default();
1913 if (!uopt.nls_map)
1914 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1915 else
1916 udf_debug("Using default NLS map\n");
1918 #endif
1919 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1920 uopt.flags |= (1 << UDF_FLAG_UTF8);
1922 fileset.logicalBlockNum = 0xFFFFFFFF;
1923 fileset.partitionReferenceNum = 0xFFFF;
1925 sbi->s_flags = uopt.flags;
1926 sbi->s_uid = uopt.uid;
1927 sbi->s_gid = uopt.gid;
1928 sbi->s_umask = uopt.umask;
1929 sbi->s_fmode = uopt.fmode;
1930 sbi->s_dmode = uopt.dmode;
1931 sbi->s_nls_map = uopt.nls_map;
1933 if (uopt.session == 0xFFFFFFFF)
1934 sbi->s_session = udf_get_last_session(sb);
1935 else
1936 sbi->s_session = uopt.session;
1938 udf_debug("Multi-session=%d\n", sbi->s_session);
1940 /* Fill in the rest of the superblock */
1941 sb->s_op = &udf_sb_ops;
1942 sb->s_export_op = &udf_export_ops;
1944 sb->s_dirt = 0;
1945 sb->s_magic = UDF_SUPER_MAGIC;
1946 sb->s_time_gran = 1000;
1948 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
1949 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1950 } else {
1951 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
1952 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1953 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1954 if (!silent)
1955 printk(KERN_NOTICE
1956 "UDF-fs: Rescanning with blocksize "
1957 "%d\n", UDF_DEFAULT_BLOCKSIZE);
1958 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
1959 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1962 if (!ret) {
1963 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
1964 goto error_out;
1967 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1969 if (sbi->s_lvid_bh) {
1970 struct logicalVolIntegrityDescImpUse *lvidiu =
1971 udf_sb_lvidiu(sbi);
1972 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1973 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
1974 /* uint16_t maxUDFWriteRev =
1975 le16_to_cpu(lvidiu->maxUDFWriteRev); */
1977 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
1978 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
1979 "(max is %x)\n",
1980 le16_to_cpu(lvidiu->minUDFReadRev),
1981 UDF_MAX_READ_VERSION);
1982 goto error_out;
1983 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
1984 sb->s_flags |= MS_RDONLY;
1986 sbi->s_udfrev = minUDFWriteRev;
1988 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
1989 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
1990 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
1991 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
1994 if (!sbi->s_partitions) {
1995 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
1996 goto error_out;
1999 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2000 UDF_PART_FLAG_READ_ONLY) {
2001 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
2002 "forcing readonly mount\n");
2003 sb->s_flags |= MS_RDONLY;
2006 if (udf_find_fileset(sb, &fileset, &rootdir)) {
2007 printk(KERN_WARNING "UDF-fs: No fileset found\n");
2008 goto error_out;
2011 if (!silent) {
2012 struct timestamp ts;
2013 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
2014 udf_info("UDF: Mounting volume '%s', "
2015 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2016 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
2017 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
2019 if (!(sb->s_flags & MS_RDONLY))
2020 udf_open_lvid(sb);
2022 /* Assign the root inode */
2023 /* assign inodes by physical block number */
2024 /* perhaps it's not extensible enough, but for now ... */
2025 inode = udf_iget(sb, &rootdir);
2026 if (!inode) {
2027 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
2028 "partition=%d\n",
2029 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
2030 goto error_out;
2033 /* Allocate a dentry for the root inode */
2034 sb->s_root = d_alloc_root(inode);
2035 if (!sb->s_root) {
2036 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
2037 iput(inode);
2038 goto error_out;
2040 sb->s_maxbytes = MAX_LFS_FILESIZE;
2041 unlock_kernel();
2042 return 0;
2044 error_out:
2045 if (sbi->s_vat_inode)
2046 iput(sbi->s_vat_inode);
2047 if (sbi->s_partitions)
2048 for (i = 0; i < sbi->s_partitions; i++)
2049 udf_free_partition(&sbi->s_partmaps[i]);
2050 #ifdef CONFIG_UDF_NLS
2051 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2052 unload_nls(sbi->s_nls_map);
2053 #endif
2054 if (!(sb->s_flags & MS_RDONLY))
2055 udf_close_lvid(sb);
2056 brelse(sbi->s_lvid_bh);
2058 kfree(sbi->s_partmaps);
2059 kfree(sbi);
2060 sb->s_fs_info = NULL;
2062 unlock_kernel();
2063 return -EINVAL;
2066 static void udf_error(struct super_block *sb, const char *function,
2067 const char *fmt, ...)
2069 va_list args;
2071 if (!(sb->s_flags & MS_RDONLY)) {
2072 /* mark sb error */
2073 sb->s_dirt = 1;
2075 va_start(args, fmt);
2076 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2077 va_end(args);
2078 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
2079 sb->s_id, function, error_buf);
2082 void udf_warning(struct super_block *sb, const char *function,
2083 const char *fmt, ...)
2085 va_list args;
2087 va_start(args, fmt);
2088 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
2089 va_end(args);
2090 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
2091 sb->s_id, function, error_buf);
2094 static void udf_put_super(struct super_block *sb)
2096 int i;
2097 struct udf_sb_info *sbi;
2099 sbi = UDF_SB(sb);
2101 lock_kernel();
2103 if (sbi->s_vat_inode)
2104 iput(sbi->s_vat_inode);
2105 if (sbi->s_partitions)
2106 for (i = 0; i < sbi->s_partitions; i++)
2107 udf_free_partition(&sbi->s_partmaps[i]);
2108 #ifdef CONFIG_UDF_NLS
2109 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
2110 unload_nls(sbi->s_nls_map);
2111 #endif
2112 if (!(sb->s_flags & MS_RDONLY))
2113 udf_close_lvid(sb);
2114 brelse(sbi->s_lvid_bh);
2115 kfree(sbi->s_partmaps);
2116 kfree(sb->s_fs_info);
2117 sb->s_fs_info = NULL;
2119 unlock_kernel();
2122 static int udf_sync_fs(struct super_block *sb, int wait)
2124 struct udf_sb_info *sbi = UDF_SB(sb);
2126 mutex_lock(&sbi->s_alloc_mutex);
2127 if (sbi->s_lvid_dirty) {
2129 * Blockdevice will be synced later so we don't have to submit
2130 * the buffer for IO
2132 mark_buffer_dirty(sbi->s_lvid_bh);
2133 sb->s_dirt = 0;
2134 sbi->s_lvid_dirty = 0;
2136 mutex_unlock(&sbi->s_alloc_mutex);
2138 return 0;
2141 static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
2143 struct super_block *sb = dentry->d_sb;
2144 struct udf_sb_info *sbi = UDF_SB(sb);
2145 struct logicalVolIntegrityDescImpUse *lvidiu;
2146 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
2148 if (sbi->s_lvid_bh != NULL)
2149 lvidiu = udf_sb_lvidiu(sbi);
2150 else
2151 lvidiu = NULL;
2153 buf->f_type = UDF_SUPER_MAGIC;
2154 buf->f_bsize = sb->s_blocksize;
2155 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
2156 buf->f_bfree = udf_count_free(sb);
2157 buf->f_bavail = buf->f_bfree;
2158 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2159 le32_to_cpu(lvidiu->numDirs)) : 0)
2160 + buf->f_bfree;
2161 buf->f_ffree = buf->f_bfree;
2162 buf->f_namelen = UDF_NAME_LEN - 2;
2163 buf->f_fsid.val[0] = (u32)id;
2164 buf->f_fsid.val[1] = (u32)(id >> 32);
2166 return 0;
2169 static unsigned int udf_count_free_bitmap(struct super_block *sb,
2170 struct udf_bitmap *bitmap)
2172 struct buffer_head *bh = NULL;
2173 unsigned int accum = 0;
2174 int index;
2175 int block = 0, newblock;
2176 struct kernel_lb_addr loc;
2177 uint32_t bytes;
2178 uint8_t *ptr;
2179 uint16_t ident;
2180 struct spaceBitmapDesc *bm;
2182 lock_kernel();
2184 loc.logicalBlockNum = bitmap->s_extPosition;
2185 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
2186 bh = udf_read_ptagged(sb, &loc, 0, &ident);
2188 if (!bh) {
2189 printk(KERN_ERR "udf: udf_count_free failed\n");
2190 goto out;
2191 } else if (ident != TAG_IDENT_SBD) {
2192 brelse(bh);
2193 printk(KERN_ERR "udf: udf_count_free failed\n");
2194 goto out;
2197 bm = (struct spaceBitmapDesc *)bh->b_data;
2198 bytes = le32_to_cpu(bm->numOfBytes);
2199 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2200 ptr = (uint8_t *)bh->b_data;
2202 while (bytes > 0) {
2203 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2204 accum += bitmap_weight((const unsigned long *)(ptr + index),
2205 cur_bytes * 8);
2206 bytes -= cur_bytes;
2207 if (bytes) {
2208 brelse(bh);
2209 newblock = udf_get_lb_pblock(sb, &loc, ++block);
2210 bh = udf_tread(sb, newblock);
2211 if (!bh) {
2212 udf_debug("read failed\n");
2213 goto out;
2215 index = 0;
2216 ptr = (uint8_t *)bh->b_data;
2219 brelse(bh);
2221 out:
2222 unlock_kernel();
2224 return accum;
2227 static unsigned int udf_count_free_table(struct super_block *sb,
2228 struct inode *table)
2230 unsigned int accum = 0;
2231 uint32_t elen;
2232 struct kernel_lb_addr eloc;
2233 int8_t etype;
2234 struct extent_position epos;
2236 lock_kernel();
2238 epos.block = UDF_I(table)->i_location;
2239 epos.offset = sizeof(struct unallocSpaceEntry);
2240 epos.bh = NULL;
2242 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
2243 accum += (elen >> table->i_sb->s_blocksize_bits);
2245 brelse(epos.bh);
2247 unlock_kernel();
2249 return accum;
2252 static unsigned int udf_count_free(struct super_block *sb)
2254 unsigned int accum = 0;
2255 struct udf_sb_info *sbi;
2256 struct udf_part_map *map;
2258 sbi = UDF_SB(sb);
2259 if (sbi->s_lvid_bh) {
2260 struct logicalVolIntegrityDesc *lvid =
2261 (struct logicalVolIntegrityDesc *)
2262 sbi->s_lvid_bh->b_data;
2263 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
2264 accum = le32_to_cpu(
2265 lvid->freeSpaceTable[sbi->s_partition]);
2266 if (accum == 0xFFFFFFFF)
2267 accum = 0;
2271 if (accum)
2272 return accum;
2274 map = &sbi->s_partmaps[sbi->s_partition];
2275 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
2276 accum += udf_count_free_bitmap(sb,
2277 map->s_uspace.s_bitmap);
2279 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
2280 accum += udf_count_free_bitmap(sb,
2281 map->s_fspace.s_bitmap);
2283 if (accum)
2284 return accum;
2286 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
2287 accum += udf_count_free_table(sb,
2288 map->s_uspace.s_table);
2290 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
2291 accum += udf_count_free_table(sb,
2292 map->s_fspace.s_table);
2295 return accum;