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udf: fix udf_debug macro
[linux-2.6-block.git] / fs / udf / super.c
CommitLineData
1da177e4
LT		 1/*
2 * super.c
3 *
4 * PURPOSE
5 * Super block routines for the OSTA-UDF(tm) filesystem.
6 *
7 * DESCRIPTION
8 * OSTA-UDF(tm) = Optical Storage Technology Association
9 * Universal Disk Format.
10 *
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/
16 *
1da177e4
LT		 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.
22 *
23 * (C) 1998 Dave Boynton
24 * (C) 1998-2004 Ben Fennema
25 * (C) 2000 Stelias Computing Inc
26 *
27 * HISTORY
28 *
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
3a71fc5d
MS		 36 * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced
37 * vol descs. rewrote option handling based on isofs
1da177e4
LT		 38 * 12/20/98 find the free space bitmap (if it exists)
39 */
40
cb00ea35 41#include "udfdecl.h"
1da177e4 42
1da177e4
LT		 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>
dc5d39be 55#include <linux/errno.h>
1da177e4
LT		 56#include <asm/byteorder.h>
57
58#include <linux/udf_fs.h>
59#include "udf_sb.h"
60#include "udf_i.h"
61
62#include <linux/init.h>
63#include <asm/uaccess.h>
64
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
73
74static char error_buf[1024];
75
76/* These are the "meat" - everything else is stuffing */
77static int udf_fill_super(struct super_block *, void *, int);
78static void udf_put_super(struct super_block *);
79static void udf_write_super(struct super_block *);
80static int udf_remount_fs(struct super_block *, int *, char *);
81static int udf_check_valid(struct super_block *, int, int);
82static int udf_vrs(struct super_block *sb, int silent);
83static int udf_load_partition(struct super_block *, kernel_lb_addr *);
cb00ea35
CG		 84static int udf_load_logicalvol(struct super_block *, struct buffer_head *,
85 kernel_lb_addr *);
1da177e4
LT		 86static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad);
87static void udf_find_anchor(struct super_block *);
cb00ea35
CG		 88static int udf_find_fileset(struct super_block *, kernel_lb_addr *,
89 kernel_lb_addr *);
1da177e4 90static void udf_load_pvoldesc(struct super_block *, struct buffer_head *);
cb00ea35
CG		 91static void udf_load_fileset(struct super_block *, struct buffer_head *,
92 kernel_lb_addr *);
bcec4477 93static int udf_load_partdesc(struct super_block *, struct buffer_head *);
1da177e4
LT		 94static void udf_open_lvid(struct super_block *);
95static void udf_close_lvid(struct super_block *);
96static unsigned int udf_count_free(struct super_block *);
726c3342 97static int udf_statfs(struct dentry *, struct kstatfs *);
1da177e4 98
6c79e987
MS		 99struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
100{
4b11111a
MS		 101 struct logicalVolIntegrityDesc *lvid =
102 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
6c79e987 103 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
4b11111a
MS		 104 __u32 offset = number_of_partitions * 2 *
105 sizeof(uint32_t)/sizeof(uint8_t);
6c79e987
MS		 106 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
107}
108
1da177e4 109/* UDF filesystem type */
454e2398 110static int udf_get_sb(struct file_system_type *fs_type,
cb00ea35
CG		 111 int flags, const char *dev_name, void *data,
112 struct vfsmount *mnt)
1da177e4 113{
454e2398 114 return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt);
1da177e4
LT		 115}
116
117static struct file_system_type udf_fstype = {
28de7948
CG		 118 .owner = THIS_MODULE,
119 .name = "udf",
120 .get_sb = udf_get_sb,
121 .kill_sb = kill_block_super,
122 .fs_flags = FS_REQUIRES_DEV,
1da177e4
LT		 123};
124
cb00ea35 125static struct kmem_cache *udf_inode_cachep;
1da177e4
LT		 126
127static struct inode *udf_alloc_inode(struct super_block *sb)
128{
129 struct udf_inode_info *ei;
3a71fc5d 130 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
1da177e4
LT		 131 if (!ei)
132 return NULL;
95f8797f
DB		 133
134 ei->i_unique = 0;
135 ei->i_lenExtents = 0;
136 ei->i_next_alloc_block = 0;
137 ei->i_next_alloc_goal = 0;
138 ei->i_strat4096 = 0;
139
1da177e4
LT		 140 return &ei->vfs_inode;
141}
142
143static void udf_destroy_inode(struct inode *inode)
144{
145 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
146}
147
4ba9b9d0 148static void init_once(struct kmem_cache *cachep, void *foo)
1da177e4 149{
cb00ea35 150 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
1da177e4 151
a35afb83
CL		 152 ei->i_ext.i_data = NULL;
153 inode_init_once(&ei->vfs_inode);
1da177e4
LT		 154}
155
156static int init_inodecache(void)
157{
158 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
159 sizeof(struct udf_inode_info),
cb00ea35
CG		 160 0, (SLAB_RECLAIM_ACCOUNT |
161 SLAB_MEM_SPREAD),
20c2df83 162 init_once);
28de7948 163 if (!udf_inode_cachep)
1da177e4
LT		 164 return -ENOMEM;
165 return 0;
166}
167
168static void destroy_inodecache(void)
169{
1a1d92c1 170 kmem_cache_destroy(udf_inode_cachep);
1da177e4
LT		 171}
172
173/* Superblock operations */
ee9b6d61 174static const struct super_operations udf_sb_ops = {
28de7948
CG		 175 .alloc_inode = udf_alloc_inode,
176 .destroy_inode = udf_destroy_inode,
177 .write_inode = udf_write_inode,
178 .delete_inode = udf_delete_inode,
179 .clear_inode = udf_clear_inode,
180 .put_super = udf_put_super,
181 .write_super = udf_write_super,
182 .statfs = udf_statfs,
183 .remount_fs = udf_remount_fs,
1da177e4
LT		 184};
185
cb00ea35 186struct udf_options {
1da177e4
LT		 187 unsigned char novrs;
188 unsigned int blocksize;
189 unsigned int session;
190 unsigned int lastblock;
191 unsigned int anchor;
192 unsigned int volume;
193 unsigned short partition;
194 unsigned int fileset;
195 unsigned int rootdir;
196 unsigned int flags;
197 mode_t umask;
198 gid_t gid;
199 uid_t uid;
200 struct nls_table *nls_map;
201};
202
203static int __init init_udf_fs(void)
204{
205 int err;
28de7948 206
1da177e4
LT		 207 err = init_inodecache();
208 if (err)
209 goto out1;
210 err = register_filesystem(&udf_fstype);
211 if (err)
212 goto out;
28de7948 213
1da177e4 214 return 0;
28de7948
CG		 215
216out:
1da177e4 217 destroy_inodecache();
28de7948
CG		 218
219out1:
1da177e4
LT		 220 return err;
221}
222
223static void __exit exit_udf_fs(void)
224{
225 unregister_filesystem(&udf_fstype);
226 destroy_inodecache();
227}
228
229module_init(init_udf_fs)
28de7948 230module_exit(exit_udf_fs)
1da177e4 231
dc5d39be
MS		 232static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
233{
234 struct udf_sb_info *sbi = UDF_SB(sb);
235
236 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
237 GFP_KERNEL);
238 if (!sbi->s_partmaps) {
239 udf_error(sb, __FUNCTION__,
240 "Unable to allocate space for %d partition maps",
241 count);
242 sbi->s_partitions = 0;
243 return -ENOMEM;
244 }
245
246 sbi->s_partitions = count;
247 return 0;
248}
249
1da177e4
LT		 250/*
251 * udf_parse_options
252 *
253 * PURPOSE
254 * Parse mount options.
255 *
256 * DESCRIPTION
257 * The following mount options are supported:
258 *
259 * gid= Set the default group.
260 * umask= Set the default umask.
261 * uid= Set the default user.
262 * bs= Set the block size.
263 * unhide Show otherwise hidden files.
264 * undelete Show deleted files in lists.
265 * adinicb Embed data in the inode (default)
266 * noadinicb Don't embed data in the inode
267 * shortad Use short ad's
268 * longad Use long ad's (default)
269 * nostrict Unset strict conformance
270 * iocharset= Set the NLS character set
271 *
272 * The remaining are for debugging and disaster recovery:
273 *
28de7948 274 * novrs Skip volume sequence recognition
1da177e4
LT		 275 *
276 * The following expect a offset from 0.
277 *
278 * session= Set the CDROM session (default= last session)
279 * anchor= Override standard anchor location. (default= 256)
280 * volume= Override the VolumeDesc location. (unused)
281 * partition= Override the PartitionDesc location. (unused)
282 * lastblock= Set the last block of the filesystem/
283 *
284 * The following expect a offset from the partition root.
285 *
286 * fileset= Override the fileset block location. (unused)
287 * rootdir= Override the root directory location. (unused)
288 * WARNING: overriding the rootdir to a non-directory may
289 * yield highly unpredictable results.
290 *
291 * PRE-CONDITIONS
292 * options Pointer to mount options string.
293 * uopts Pointer to mount options variable.
294 *
295 * POST-CONDITIONS
296 * <return> 1 Mount options parsed okay.
297 * <return> 0 Error parsing mount options.
298 *
299 * HISTORY
300 * July 1, 1997 - Andrew E. Mileski
301 * Written, tested, and released.
302 */
28de7948 303
1da177e4
LT		 304enum {
305 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
306 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
307 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
308 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
309 Opt_rootdir, Opt_utf8, Opt_iocharset,
4d6660eb 310 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore
1da177e4
LT		 311};
312
313static match_table_t tokens = {
28de7948
CG		 314 {Opt_novrs, "novrs"},
315 {Opt_nostrict, "nostrict"},
316 {Opt_bs, "bs=%u"},
317 {Opt_unhide, "unhide"},
318 {Opt_undelete, "undelete"},
319 {Opt_noadinicb, "noadinicb"},
320 {Opt_adinicb, "adinicb"},
321 {Opt_shortad, "shortad"},
322 {Opt_longad, "longad"},
323 {Opt_uforget, "uid=forget"},
324 {Opt_uignore, "uid=ignore"},
325 {Opt_gforget, "gid=forget"},
326 {Opt_gignore, "gid=ignore"},
327 {Opt_gid, "gid=%u"},
328 {Opt_uid, "uid=%u"},
329 {Opt_umask, "umask=%o"},
330 {Opt_session, "session=%u"},
331 {Opt_lastblock, "lastblock=%u"},
332 {Opt_anchor, "anchor=%u"},
333 {Opt_volume, "volume=%u"},
334 {Opt_partition, "partition=%u"},
335 {Opt_fileset, "fileset=%u"},
336 {Opt_rootdir, "rootdir=%u"},
337 {Opt_utf8, "utf8"},
338 {Opt_iocharset, "iocharset=%s"},
339 {Opt_err, NULL}
1da177e4
LT		 340};
341
cb00ea35 342static int udf_parse_options(char *options, struct udf_options *uopt)
1da177e4
LT		 343{
344 char *p;
345 int option;
346
347 uopt->novrs = 0;
348 uopt->blocksize = 2048;
349 uopt->partition = 0xFFFF;
350 uopt->session = 0xFFFFFFFF;
351 uopt->lastblock = 0;
352 uopt->anchor = 0;
353 uopt->volume = 0xFFFFFFFF;
354 uopt->rootdir = 0xFFFFFFFF;
355 uopt->fileset = 0xFFFFFFFF;
356 uopt->nls_map = NULL;
357
358 if (!options)
359 return 1;
360
cb00ea35 361 while ((p = strsep(&options, ",")) != NULL) {
1da177e4
LT		 362 substring_t args[MAX_OPT_ARGS];
363 int token;
364 if (!*p)
365 continue;
366
367 token = match_token(p, tokens, args);
cb00ea35
CG		 368 switch (token) {
369 case Opt_novrs:
370 uopt->novrs = 1;
371 case Opt_bs:
372 if (match_int(&args[0], &option))
373 return 0;
374 uopt->blocksize = option;
375 break;
376 case Opt_unhide:
377 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
378 break;
379 case Opt_undelete:
380 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
381 break;
382 case Opt_noadinicb:
383 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
384 break;
385 case Opt_adinicb:
386 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
387 break;
388 case Opt_shortad:
389 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
390 break;
391 case Opt_longad:
392 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
393 break;
394 case Opt_gid:
395 if (match_int(args, &option))
396 return 0;
397 uopt->gid = option;
ca76d2d8 398 uopt->flags |= (1 << UDF_FLAG_GID_SET);
cb00ea35
CG		 399 break;
400 case Opt_uid:
401 if (match_int(args, &option))
402 return 0;
403 uopt->uid = option;
ca76d2d8 404 uopt->flags |= (1 << UDF_FLAG_UID_SET);
cb00ea35
CG		 405 break;
406 case Opt_umask:
407 if (match_octal(args, &option))
408 return 0;
409 uopt->umask = option;
410 break;
411 case Opt_nostrict:
412 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
413 break;
414 case Opt_session:
415 if (match_int(args, &option))
416 return 0;
417 uopt->session = option;
418 break;
419 case Opt_lastblock:
420 if (match_int(args, &option))
421 return 0;
422 uopt->lastblock = option;
423 break;
424 case Opt_anchor:
425 if (match_int(args, &option))
426 return 0;
427 uopt->anchor = option;
428 break;
429 case Opt_volume:
430 if (match_int(args, &option))
431 return 0;
432 uopt->volume = option;
433 break;
434 case Opt_partition:
435 if (match_int(args, &option))
436 return 0;
437 uopt->partition = option;
438 break;
439 case Opt_fileset:
440 if (match_int(args, &option))
441 return 0;
442 uopt->fileset = option;
443 break;
444 case Opt_rootdir:
445 if (match_int(args, &option))
446 return 0;
447 uopt->rootdir = option;
448 break;
449 case Opt_utf8:
450 uopt->flags |= (1 << UDF_FLAG_UTF8);
451 break;
1da177e4 452#ifdef CONFIG_UDF_NLS
cb00ea35
CG		 453 case Opt_iocharset:
454 uopt->nls_map = load_nls(args[0].from);
455 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
456 break;
1da177e4 457#endif
cb00ea35
CG		 458 case Opt_uignore:
459 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
460 break;
461 case Opt_uforget:
462 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
463 break;
464 case Opt_gignore:
465 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
466 break;
467 case Opt_gforget:
468 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
469 break;
470 default:
471 printk(KERN_ERR "udf: bad mount option \"%s\" "
472 "or missing value\n", p);
1da177e4
LT		 473 return 0;
474 }
475 }
476 return 1;
477}
478
bd45a420 479static void udf_write_super(struct super_block *sb)
1da177e4
LT		 480{
481 lock_kernel();
28de7948 482
1da177e4
LT		 483 if (!(sb->s_flags & MS_RDONLY))
484 udf_open_lvid(sb);
485 sb->s_dirt = 0;
28de7948 486
1da177e4
LT		 487 unlock_kernel();
488}
489
cb00ea35 490static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
1da177e4
LT		 491{
492 struct udf_options uopt;
6c79e987 493 struct udf_sb_info *sbi = UDF_SB(sb);
1da177e4 494
6c79e987
MS		 495 uopt.flags = sbi->s_flags;
496 uopt.uid = sbi->s_uid;
497 uopt.gid = sbi->s_gid;
498 uopt.umask = sbi->s_umask;
1da177e4 499
cb00ea35 500 if (!udf_parse_options(options, &uopt))
1da177e4
LT		 501 return -EINVAL;
502
6c79e987
MS		 503 sbi->s_flags = uopt.flags;
504 sbi->s_uid = uopt.uid;
505 sbi->s_gid = uopt.gid;
506 sbi->s_umask = uopt.umask;
1da177e4 507
6c79e987
MS		 508 if (sbi->s_lvid_bh) {
509 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
1da177e4
LT		 510 if (write_rev > UDF_MAX_WRITE_VERSION)
511 *flags |= MS_RDONLY;
512 }
513
514 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
515 return 0;
516 if (*flags & MS_RDONLY)
517 udf_close_lvid(sb);
518 else
519 udf_open_lvid(sb);
520
521 return 0;
522}
523
524/*
525 * udf_set_blocksize
526 *
527 * PURPOSE
528 * Set the block size to be used in all transfers.
529 *
530 * DESCRIPTION
531 * To allow room for a DMA transfer, it is best to guess big when unsure.
532 * This routine picks 2048 bytes as the blocksize when guessing. This
533 * should be adequate until devices with larger block sizes become common.
534 *
535 * Note that the Linux kernel can currently only deal with blocksizes of
536 * 512, 1024, 2048, 4096, and 8192 bytes.
537 *
538 * PRE-CONDITIONS
539 * sb Pointer to _locked_ superblock.
540 *
541 * POST-CONDITIONS
542 * sb->s_blocksize Blocksize.
543 * sb->s_blocksize_bits log2 of blocksize.
544 * <return> 0 Blocksize is valid.
545 * <return> 1 Blocksize is invalid.
546 *
547 * HISTORY
548 * July 1, 1997 - Andrew E. Mileski
549 * Written, tested, and released.
550 */
cb00ea35 551static int udf_set_blocksize(struct super_block *sb, int bsize)
1da177e4
LT		 552{
553 if (!sb_min_blocksize(sb, bsize)) {
554 udf_debug("Bad block size (%d)\n", bsize);
555 printk(KERN_ERR "udf: bad block size (%d)\n", bsize);
556 return 0;
557 }
28de7948 558
1da177e4
LT		 559 return sb->s_blocksize;
560}
561
cb00ea35 562static int udf_vrs(struct super_block *sb, int silent)
1da177e4
LT		 563{
564 struct volStructDesc *vsd = NULL;
565 int sector = 32768;
566 int sectorsize;
567 struct buffer_head *bh = NULL;
cb00ea35
CG		 568 int iso9660 = 0;
569 int nsr02 = 0;
570 int nsr03 = 0;
6c79e987 571 struct udf_sb_info *sbi;
1da177e4
LT		 572
573 /* Block size must be a multiple of 512 */
574 if (sb->s_blocksize & 511)
575 return 0;
6c79e987 576 sbi = UDF_SB(sb);
1da177e4
LT		 577
578 if (sb->s_blocksize < sizeof(struct volStructDesc))
579 sectorsize = sizeof(struct volStructDesc);
580 else
581 sectorsize = sb->s_blocksize;
582
6c79e987 583 sector += (sbi->s_session << sb->s_blocksize_bits);
1da177e4
LT		 584
585 udf_debug("Starting at sector %u (%ld byte sectors)\n",
cb00ea35 586 (sector >> sb->s_blocksize_bits), sb->s_blocksize);
1da177e4 587 /* Process the sequence (if applicable) */
cb00ea35 588 for (; !nsr02 && !nsr03; sector += sectorsize) {
1da177e4
LT		 589 /* Read a block */
590 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
591 if (!bh)
592 break;
593
594 /* Look for ISO descriptors */
595 vsd = (struct volStructDesc *)(bh->b_data +
3a71fc5d 596 (sector & (sb->s_blocksize - 1)));
1da177e4 597
cb00ea35 598 if (vsd->stdIdent[0] == 0) {
3bf25cb4 599 brelse(bh);
1da177e4 600 break;
3a71fc5d
MS		 601 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
602 VSD_STD_ID_LEN)) {
1da177e4 603 iso9660 = sector;
cb00ea35
CG		 604 switch (vsd->structType) {
605 case 0:
606 udf_debug("ISO9660 Boot Record found\n");
607 break;
608 case 1:
3a71fc5d
MS		 609 udf_debug("ISO9660 Primary Volume Descriptor "
610 "found\n");
cb00ea35
CG		 611 break;
612 case 2:
3a71fc5d
MS		 613 udf_debug("ISO9660 Supplementary Volume "
614 "Descriptor found\n");
cb00ea35
CG		 615 break;
616 case 3:
3a71fc5d
MS		 617 udf_debug("ISO9660 Volume Partition Descriptor "
618 "found\n");
cb00ea35
CG		 619 break;
620 case 255:
3a71fc5d
MS		 621 udf_debug("ISO9660 Volume Descriptor Set "
622 "Terminator found\n");
cb00ea35
CG		 623 break;
624 default:
625 udf_debug("ISO9660 VRS (%u) found\n",
626 vsd->structType);
627 break;
1da177e4 628 }
3a71fc5d
MS		 629 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
630 VSD_STD_ID_LEN))
631 ; /* nothing */
632 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
633 VSD_STD_ID_LEN)) {
3bf25cb4 634 brelse(bh);
1da177e4 635 break;
3a71fc5d
MS		 636 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
637 VSD_STD_ID_LEN))
1da177e4 638 nsr02 = sector;
3a71fc5d
MS		 639 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
640 VSD_STD_ID_LEN))
1da177e4 641 nsr03 = sector;
3bf25cb4 642 brelse(bh);
1da177e4
LT		 643 }
644
645 if (nsr03)
646 return nsr03;
647 else if (nsr02)
648 return nsr02;
6c79e987 649 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
1da177e4
LT		 650 return -1;
651 else
652 return 0;
653}
654
655/*
656 * udf_find_anchor
657 *
658 * PURPOSE
659 * Find an anchor volume descriptor.
660 *
661 * PRE-CONDITIONS
662 * sb Pointer to _locked_ superblock.
663 * lastblock Last block on media.
664 *
665 * POST-CONDITIONS
666 * <return> 1 if not found, 0 if ok
667 *
668 * HISTORY
669 * July 1, 1997 - Andrew E. Mileski
670 * Written, tested, and released.
671 */
cb00ea35 672static void udf_find_anchor(struct super_block *sb)
1da177e4 673{
6c79e987 674 int lastblock;
1da177e4
LT		 675 struct buffer_head *bh = NULL;
676 uint16_t ident;
677 uint32_t location;
678 int i;
6c79e987
MS		 679 struct udf_sb_info *sbi;
680
681 sbi = UDF_SB(sb);
682 lastblock = sbi->s_last_block;
1da177e4 683
cb00ea35 684 if (lastblock) {
1da177e4 685 int varlastblock = udf_variable_to_fixed(lastblock);
28de7948
CG		 686 int last[] = { lastblock, lastblock - 2,
687 lastblock - 150, lastblock - 152,
688 varlastblock, varlastblock - 2,
689 varlastblock - 150, varlastblock - 152 };
1da177e4
LT		 690
691 lastblock = 0;
692
693 /* Search for an anchor volume descriptor pointer */
694
695 /* according to spec, anchor is in either:
696 * block 256
697 * lastblock-256
698 * lastblock
699 * however, if the disc isn't closed, it could be 512 */
700
e8c96f8c 701 for (i = 0; !lastblock && i < ARRAY_SIZE(last); i++) {
3a71fc5d
MS		 702 ident = location = 0;
703 if (last[i] >= 0) {
704 bh = sb_bread(sb, last[i]);
705 if (bh) {
706 tag *t = (tag *)bh->b_data;
707 ident = le16_to_cpu(t->tagIdent);
708 location = le32_to_cpu(t->tagLocation);
709 brelse(bh);
710 }
1da177e4 711 }
e8c96f8c 712
cb00ea35 713 if (ident == TAG_IDENT_AVDP) {
6c79e987
MS		 714 if (location == last[i] - sbi->s_session) {
715 lastblock = last[i] - sbi->s_session;
716 sbi->s_anchor[0] = lastblock;
717 sbi->s_anchor[1] = lastblock - 256;
4b11111a
MS		 718 } else if (location ==
719 udf_variable_to_fixed(last[i]) -
720 sbi->s_session) {
1da177e4 721 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
4b11111a
MS		 722 lastblock =
723 udf_variable_to_fixed(last[i]) -
724 sbi->s_session;
6c79e987 725 sbi->s_anchor[0] = lastblock;
4b11111a
MS		 726 sbi->s_anchor[1] = lastblock - 256 -
727 sbi->s_session;
28de7948 728 } else {
4b11111a
MS		 729 udf_debug("Anchor found at block %d, "
730 "location mismatch %d.\n",
28de7948
CG		 731 last[i], location);
732 }
4b11111a
MS		 733 } else if (ident == TAG_IDENT_FE ||
734 ident == TAG_IDENT_EFE) {
1da177e4 735 lastblock = last[i];
6c79e987 736 sbi->s_anchor[3] = 512;
cb00ea35 737 } else {
3a71fc5d
MS		 738 ident = location = 0;
739 if (last[i] >= 256) {
740 bh = sb_bread(sb, last[i] - 256);
741 if (bh) {
742 tag *t = (tag *)bh->b_data;
4b11111a
MS		 743 ident = le16_to_cpu(
744 t->tagIdent);
745 location = le32_to_cpu(
746 t->tagLocation);
3a71fc5d
MS		 747 brelse(bh);
748 }
1da177e4 749 }
cb00ea35 750
1da177e4 751 if (ident == TAG_IDENT_AVDP &&
4b11111a
MS		 752 location == last[i] - 256 -
753 sbi->s_session) {
1da177e4 754 lastblock = last[i];
6c79e987 755 sbi->s_anchor[1] = last[i] - 256;
cb00ea35 756 } else {
3a71fc5d 757 ident = location = 0;
6c79e987 758 if (last[i] >= 312 + sbi->s_session) {
4b11111a
MS		 759 bh = sb_bread(sb,
760 last[i] - 312 -
761 sbi->s_session);
3a71fc5d 762 if (bh) {
4b11111a
MS		 763 tag *t = (tag *)
764 bh->b_data;
765 ident = le16_to_cpu(
766 t->tagIdent);
767 location = le32_to_cpu(
768 t->tagLocation);
3a71fc5d
MS		 769 brelse(bh);
770 }
1da177e4 771 }
cb00ea35 772
1da177e4 773 if (ident == TAG_IDENT_AVDP &&
28de7948 774 location == udf_variable_to_fixed(last[i]) - 256) {
4b11111a
MS		 775 UDF_SET_FLAG(sb,
776 UDF_FLAG_VARCONV);
28de7948 777 lastblock = udf_variable_to_fixed(last[i]);
6c79e987 778 sbi->s_anchor[1] = lastblock - 256;
1da177e4
LT		 779 }
780 }
781 }
782 }
783 }
784
cb00ea35 785 if (!lastblock) {
3a71fc5d 786 /* We haven't found the lastblock. check 312 */
6c79e987 787 bh = sb_bread(sb, 312 + sbi->s_session);
3a71fc5d
MS		 788 if (bh) {
789 tag *t = (tag *)bh->b_data;
790 ident = le16_to_cpu(t->tagIdent);
791 location = le32_to_cpu(t->tagLocation);
3bf25cb4 792 brelse(bh);
1da177e4
LT		 793
794 if (ident == TAG_IDENT_AVDP && location == 256)
795 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
796 }
797 }
798
6c79e987
MS		 799 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
800 if (sbi->s_anchor[i]) {
801 bh = udf_read_tagged(sb, sbi->s_anchor[i],
802 sbi->s_anchor[i], &ident);
3a71fc5d 803 if (!bh)
6c79e987 804 sbi->s_anchor[i] = 0;
3a71fc5d 805 else {
3bf25cb4 806 brelse(bh);
28de7948 807 if ((ident != TAG_IDENT_AVDP) &&
4b11111a
MS		 808 (i || (ident != TAG_IDENT_FE &&
809 ident != TAG_IDENT_EFE)))
6c79e987 810 sbi->s_anchor[i] = 0;
1da177e4
LT		 811 }
812 }
813 }
814
6c79e987 815 sbi->s_last_block = lastblock;
1da177e4
LT		 816}
817
3a71fc5d
MS		 818static int udf_find_fileset(struct super_block *sb,
819 kernel_lb_addr *fileset,
820 kernel_lb_addr *root)
1da177e4
LT		 821{
822 struct buffer_head *bh = NULL;
823 long lastblock;
824 uint16_t ident;
6c79e987 825 struct udf_sb_info *sbi;
1da177e4
LT		 826
827 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 828 fileset->partitionReferenceNum != 0xFFFF) {
1da177e4
LT		 829 bh = udf_read_ptagged(sb, *fileset, 0, &ident);
830
28de7948 831 if (!bh) {
1da177e4 832 return 1;
28de7948 833 } else if (ident != TAG_IDENT_FSD) {
3bf25cb4 834 brelse(bh);
1da177e4
LT		 835 return 1;
836 }
cb00ea35 837
1da177e4
LT		 838 }
839
6c79e987 840 sbi = UDF_SB(sb);
3a71fc5d
MS		 841 if (!bh) {
842 /* Search backwards through the partitions */
1da177e4
LT		 843 kernel_lb_addr newfileset;
844
28de7948 845/* --> cvg: FIXME - is it reasonable? */
1da177e4 846 return 1;
cb00ea35 847
6c79e987 848 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
cb00ea35
CG		 849 (newfileset.partitionReferenceNum != 0xFFFF &&
850 fileset->logicalBlockNum == 0xFFFFFFFF &&
851 fileset->partitionReferenceNum == 0xFFFF);
852 newfileset.partitionReferenceNum--) {
6c79e987
MS		 853 lastblock = sbi->s_partmaps
854 [newfileset.partitionReferenceNum]
855 .s_partition_len;
1da177e4
LT		 856 newfileset.logicalBlockNum = 0;
857
cb00ea35 858 do {
3a71fc5d
MS		 859 bh = udf_read_ptagged(sb, newfileset, 0,
860 &ident);
cb00ea35
CG		 861 if (!bh) {
862 newfileset.logicalBlockNum++;
1da177e4
LT		 863 continue;
864 }
865
cb00ea35
CG		 866 switch (ident) {
867 case TAG_IDENT_SBD:
28de7948
CG		 868 {
869 struct spaceBitmapDesc *sp;
4b11111a
MS		 870 sp = (struct spaceBitmapDesc *)
871 bh->b_data;
28de7948
CG		 872 newfileset.logicalBlockNum += 1 +
873 ((le32_to_cpu(sp->numOfBytes) +
4b11111a
MS		 874 sizeof(struct spaceBitmapDesc)
875 - 1) >> sb->s_blocksize_bits);
28de7948
CG		 876 brelse(bh);
877 break;
878 }
cb00ea35 879 case TAG_IDENT_FSD:
28de7948
CG		 880 *fileset = newfileset;
881 break;
cb00ea35 882 default:
28de7948
CG		 883 newfileset.logicalBlockNum++;
884 brelse(bh);
885 bh = NULL;
886 break;
1da177e4 887 }
28de7948
CG		 888 } while (newfileset.logicalBlockNum < lastblock &&
889 fileset->logicalBlockNum == 0xFFFFFFFF &&
890 fileset->partitionReferenceNum == 0xFFFF);
1da177e4
LT		 891 }
892 }
893
894 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
cb00ea35 895 fileset->partitionReferenceNum != 0xFFFF) && bh) {
1da177e4 896 udf_debug("Fileset at block=%d, partition=%d\n",
cb00ea35
CG		 897 fileset->logicalBlockNum,
898 fileset->partitionReferenceNum);
1da177e4 899
6c79e987 900 sbi->s_partition = fileset->partitionReferenceNum;
1da177e4 901 udf_load_fileset(sb, bh, root);
3bf25cb4 902 brelse(bh);
1da177e4
LT		 903 return 0;
904 }
905 return 1;
906}
907
cb00ea35 908static void udf_load_pvoldesc(struct super_block *sb, struct buffer_head *bh)
1da177e4
LT		 909{
910 struct primaryVolDesc *pvoldesc;
911 time_t recording;
912 long recording_usec;
913 struct ustr instr;
914 struct ustr outstr;
915
916 pvoldesc = (struct primaryVolDesc *)bh->b_data;
917
cb00ea35
CG		 918 if (udf_stamp_to_time(&recording, &recording_usec,
919 lets_to_cpu(pvoldesc->recordingDateAndTime))) {
1da177e4
LT		 920 kernel_timestamp ts;
921 ts = lets_to_cpu(pvoldesc->recordingDateAndTime);
3a71fc5d
MS		 922 udf_debug("recording time %ld/%ld, %04u/%02u/%02u"
923 " %02u:%02u (%x)\n",
28de7948
CG		 924 recording, recording_usec,
925 ts.year, ts.month, ts.day, ts.hour,
926 ts.minute, ts.typeAndTimezone);
6c79e987
MS		 927 UDF_SB(sb)->s_record_time.tv_sec = recording;
928 UDF_SB(sb)->s_record_time.tv_nsec = recording_usec * 1000;
1da177e4
LT		 929 }
930
4b11111a 931 if (!udf_build_ustr(&instr, pvoldesc->volIdent, 32))
cb00ea35 932 if (udf_CS0toUTF8(&outstr, &instr)) {
6c79e987 933 strncpy(UDF_SB(sb)->s_volume_ident, outstr.u_name,
1da177e4 934 outstr.u_len > 31 ? 31 : outstr.u_len);
4b11111a
MS		 935 udf_debug("volIdent[] = '%s'\n",
936 UDF_SB(sb)->s_volume_ident);
1da177e4 937 }
1da177e4 938
4b11111a 939 if (!udf_build_ustr(&instr, pvoldesc->volSetIdent, 128))
1da177e4
LT		 940 if (udf_CS0toUTF8(&outstr, &instr))
941 udf_debug("volSetIdent[] = '%s'\n", outstr.u_name);
1da177e4
LT		 942}
943
28de7948
CG		 944static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
945 kernel_lb_addr *root)
1da177e4
LT		 946{
947 struct fileSetDesc *fset;
948
949 fset = (struct fileSetDesc *)bh->b_data;
950
951 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
952
6c79e987 953 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
1da177e4 954
cb00ea35
CG		 955 udf_debug("Rootdir at block=%d, partition=%d\n",
956 root->logicalBlockNum, root->partitionReferenceNum);
1da177e4
LT		 957}
958
883cb9d1
MS		 959int udf_compute_nr_groups(struct super_block *sb, u32 partition)
960{
961 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
962 return (map->s_partition_len +
963 (sizeof(struct spaceBitmapDesc) << 3) +
964 (sb->s_blocksize * 8) - 1) /
965 (sb->s_blocksize * 8);
966}
967
66e1da3f
MS		 968static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
969{
66e1da3f
MS		 970 struct udf_bitmap *bitmap;
971 int nr_groups;
972 int size;
973
883cb9d1 974 nr_groups = udf_compute_nr_groups(sb, index);
66e1da3f
MS		 975 size = sizeof(struct udf_bitmap) +
976 (sizeof(struct buffer_head *) * nr_groups);
977
978 if (size <= PAGE_SIZE)
979 bitmap = kmalloc(size, GFP_KERNEL);
980 else
981 bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
982
983 if (bitmap == NULL) {
984 udf_error(sb, __FUNCTION__,
985 "Unable to allocate space for bitmap "
986 "and %d buffer_head pointers", nr_groups);
987 return NULL;
988 }
989
990 memset(bitmap, 0x00, size);
991 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
992 bitmap->s_nr_groups = nr_groups;
993 return bitmap;
994}
995
bcec4477 996static int udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
1da177e4
LT		 997{
998 struct partitionDesc *p;
999 int i;
6c79e987
MS		 1000 struct udf_part_map *map;
1001 struct udf_sb_info *sbi;
1da177e4
LT		 1002
1003 p = (struct partitionDesc *)bh->b_data;
6c79e987 1004 sbi = UDF_SB(sb);
1da177e4 1005
6c79e987
MS		 1006 for (i = 0; i < sbi->s_partitions; i++) {
1007 map = &sbi->s_partmaps[i];
cb00ea35 1008 udf_debug("Searching map: (%d == %d)\n",
4b11111a
MS		 1009 map->s_partition_num,
1010 le16_to_cpu(p->partitionNumber));
1011 if (map->s_partition_num ==
1012 le16_to_cpu(p->partitionNumber)) {
1013 map->s_partition_len =
1014 le32_to_cpu(p->partitionLength); /* blocks */
1015 map->s_partition_root =
1016 le32_to_cpu(p->partitionStartingLocation);
5e0f0017
MS		 1017 if (p->accessType ==
1018 cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
4b11111a
MS		 1019 map->s_partition_flags |=
1020 UDF_PART_FLAG_READ_ONLY;
5e0f0017
MS		 1021 if (p->accessType ==
1022 cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
4b11111a
MS		 1023 map->s_partition_flags |=
1024 UDF_PART_FLAG_WRITE_ONCE;
5e0f0017
MS		 1025 if (p->accessType ==
1026 cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
4b11111a
MS		 1027 map->s_partition_flags |=
1028 UDF_PART_FLAG_REWRITABLE;
5e0f0017
MS		 1029 if (p->accessType ==
1030 cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
4b11111a
MS		 1031 map->s_partition_flags |=
1032 UDF_PART_FLAG_OVERWRITABLE;
28de7948 1033
3a71fc5d
MS		 1034 if (!strcmp(p->partitionContents.ident,
1035 PD_PARTITION_CONTENTS_NSR02) ||
1036 !strcmp(p->partitionContents.ident,
1037 PD_PARTITION_CONTENTS_NSR03)) {
1da177e4
LT		 1038 struct partitionHeaderDesc *phd;
1039
4b11111a
MS		 1040 phd = (struct partitionHeaderDesc *)
1041 (p->partitionContentsUse);
cb00ea35 1042 if (phd->unallocSpaceTable.extLength) {
28de7948
CG		 1043 kernel_lb_addr loc = {
1044 .logicalBlockNum = le32_to_cpu(phd->unallocSpaceTable.extPosition),
1045 .partitionReferenceNum = i,
1046 };
1047
6c79e987 1048 map->s_uspace.s_table =
28de7948 1049 udf_iget(sb, loc);
6c79e987 1050 if (!map->s_uspace.s_table) {
b1e7a4b1 1051 udf_debug("cannot load unallocSpaceTable (part %d)\n", i);
bcec4477
JK		 1052 return 1;
1053 }
4b11111a
MS		 1054 map->s_partition_flags |=
1055 UDF_PART_FLAG_UNALLOC_TABLE;
28de7948 1056 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
6c79e987 1057 i, map->s_uspace.s_table->i_ino);
1da177e4 1058 }
cb00ea35 1059 if (phd->unallocSpaceBitmap.extLength) {
4b11111a
MS		 1060 struct udf_bitmap *bitmap =
1061 udf_sb_alloc_bitmap(sb, i);
1062 map->s_uspace.s_bitmap = bitmap;
1063 if (bitmap != NULL) {
1064 bitmap->s_extLength =
28de7948 1065 le32_to_cpu(phd->unallocSpaceBitmap.extLength);
4b11111a 1066 bitmap->s_extPosition =
28de7948 1067 le32_to_cpu(phd->unallocSpaceBitmap.extPosition);
6c79e987 1068 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
28de7948 1069 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
4b11111a 1070 i, bitmap->s_extPosition);
1da177e4
LT		 1071 }
1072 }
1073 if (phd->partitionIntegrityTable.extLength)
28de7948 1074 udf_debug("partitionIntegrityTable (part %d)\n", i);
cb00ea35 1075 if (phd->freedSpaceTable.extLength) {
28de7948
CG		 1076 kernel_lb_addr loc = {
1077 .logicalBlockNum = le32_to_cpu(phd->freedSpaceTable.extPosition),
1078 .partitionReferenceNum = i,
1079 };
1080
6c79e987 1081 map->s_fspace.s_table =
28de7948 1082 udf_iget(sb, loc);
6c79e987 1083 if (!map->s_fspace.s_table) {
b1e7a4b1 1084 udf_debug("cannot load freedSpaceTable (part %d)\n", i);
bcec4477
JK		 1085 return 1;
1086 }
4b11111a
MS		 1087 map->s_partition_flags |=
1088 UDF_PART_FLAG_FREED_TABLE;
28de7948 1089 udf_debug("freedSpaceTable (part %d) @ %ld\n",
6c79e987 1090 i, map->s_fspace.s_table->i_ino);
1da177e4 1091 }
cb00ea35 1092 if (phd->freedSpaceBitmap.extLength) {
4b11111a
MS		 1093 struct udf_bitmap *bitmap =
1094 udf_sb_alloc_bitmap(sb, i);
1095 map->s_fspace.s_bitmap = bitmap;
1096 if (bitmap != NULL) {
1097 bitmap->s_extLength =
28de7948 1098 le32_to_cpu(phd->freedSpaceBitmap.extLength);
4b11111a 1099 bitmap->s_extPosition =
28de7948 1100 le32_to_cpu(phd->freedSpaceBitmap.extPosition);
6c79e987 1101 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
28de7948 1102 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
4b11111a 1103 i, bitmap->s_extPosition);
1da177e4
LT		 1104 }
1105 }
1106 }
1107 break;
1108 }
1109 }
4b11111a 1110 if (i == sbi->s_partitions)
cb00ea35
CG		 1111 udf_debug("Partition (%d) not found in partition map\n",
1112 le16_to_cpu(p->partitionNumber));
4b11111a 1113 else
3a71fc5d
MS		 1114 udf_debug("Partition (%d:%d type %x) starts at physical %d, "
1115 "block length %d\n",
1116 le16_to_cpu(p->partitionNumber), i,
6c79e987
MS		 1117 map->s_partition_type,
1118 map->s_partition_root,
1119 map->s_partition_len);
bcec4477 1120 return 0;
1da177e4
LT		 1121}
1122
28de7948
CG		 1123static int udf_load_logicalvol(struct super_block *sb, struct buffer_head *bh,
1124 kernel_lb_addr *fileset)
1da177e4
LT		 1125{
1126 struct logicalVolDesc *lvd;
1127 int i, j, offset;
1128 uint8_t type;
6c79e987 1129 struct udf_sb_info *sbi = UDF_SB(sb);
4b11111a 1130 struct genericPartitionMap *gpm;
1da177e4
LT		 1131
1132 lvd = (struct logicalVolDesc *)bh->b_data;
1133
dc5d39be
MS		 1134 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1135 if (i != 0)
1136 return i;
1da177e4 1137
cb00ea35 1138 for (i = 0, offset = 0;
6c79e987 1139 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
4b11111a
MS		 1140 i++, offset += gpm->partitionMapLength) {
1141 struct udf_part_map *map = &sbi->s_partmaps[i];
1142 gpm = (struct genericPartitionMap *)
1143 &(lvd->partitionMaps[offset]);
1144 type = gpm->partitionMapType;
cb00ea35 1145 if (type == 1) {
4b11111a
MS		 1146 struct genericPartitionMap1 *gpm1 =
1147 (struct genericPartitionMap1 *)gpm;
6c79e987
MS		 1148 map->s_partition_type = UDF_TYPE1_MAP15;
1149 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1150 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1151 map->s_partition_func = NULL;
cb00ea35 1152 } else if (type == 2) {
4b11111a
MS		 1153 struct udfPartitionMap2 *upm2 =
1154 (struct udfPartitionMap2 *)gpm;
1155 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1156 strlen(UDF_ID_VIRTUAL))) {
1157 u16 suf =
1158 le16_to_cpu(((__le16 *)upm2->partIdent.
1159 identSuffix)[0]);
1160 if (suf == 0x0150) {
1161 map->s_partition_type =
1162 UDF_VIRTUAL_MAP15;
1163 map->s_partition_func =
1164 udf_get_pblock_virt15;
1165 } else if (suf == 0x0200) {
1166 map->s_partition_type =
1167 UDF_VIRTUAL_MAP20;
1168 map->s_partition_func =
1169 udf_get_pblock_virt20;
1da177e4 1170 }
4b11111a
MS		 1171 } else if (!strncmp(upm2->partIdent.ident,
1172 UDF_ID_SPARABLE,
1173 strlen(UDF_ID_SPARABLE))) {
1da177e4
LT		 1174 uint32_t loc;
1175 uint16_t ident;
1176 struct sparingTable *st;
4b11111a
MS		 1177 struct sparablePartitionMap *spm =
1178 (struct sparablePartitionMap *)gpm;
28de7948 1179
6c79e987 1180 map->s_partition_type = UDF_SPARABLE_MAP15;
4b11111a
MS		 1181 map->s_type_specific.s_sparing.s_packet_len =
1182 le16_to_cpu(spm->packetLength);
cb00ea35 1183 for (j = 0; j < spm->numSparingTables; j++) {
4b11111a
MS		 1184 struct buffer_head *bh2;
1185
1186 loc = le32_to_cpu(
1187 spm->locSparingTable[j]);
1188 bh2 = udf_read_tagged(sb, loc, loc,
1189 &ident);
1190 map->s_type_specific.s_sparing.
1191 s_spar_map[j] = bh2;
1192
1193 if (bh2 != NULL) {
1194 st = (struct sparingTable *)
1195 bh2->b_data;
1196 if (ident != 0 || strncmp(
1197 st->sparingIdent.ident,
1198 UDF_ID_SPARING,
1199 strlen(UDF_ID_SPARING))) {
1200 brelse(bh2);
1201 map->s_type_specific.
1202 s_sparing.
1203 s_spar_map[j] =
1204 NULL;
1da177e4
LT		 1205 }
1206 }
1207 }
6c79e987 1208 map->s_partition_func = udf_get_pblock_spar15;
cb00ea35 1209 } else {
3a71fc5d
MS		 1210 udf_debug("Unknown ident: %s\n",
1211 upm2->partIdent.ident);
1da177e4
LT		 1212 continue;
1213 }
6c79e987
MS		 1214 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1215 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
1da177e4
LT		 1216 }
1217 udf_debug("Partition (%d:%d) type %d on volume %d\n",
6c79e987
MS		 1218 i, map->s_partition_num, type,
1219 map->s_volumeseqnum);
1da177e4
LT		 1220 }
1221
cb00ea35 1222 if (fileset) {
28de7948 1223 long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]);
1da177e4
LT		 1224
1225 *fileset = lelb_to_cpu(la->extLocation);
3a71fc5d
MS		 1226 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1227 "partition=%d\n", fileset->logicalBlockNum,
28de7948 1228 fileset->partitionReferenceNum);
1da177e4
LT		 1229 }
1230 if (lvd->integritySeqExt.extLength)
1231 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
28de7948 1232
1da177e4
LT		 1233 return 0;
1234}
1235
1236/*
1237 * udf_load_logicalvolint
1238 *
1239 */
cb00ea35 1240static void udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc)
1da177e4
LT		 1241{
1242 struct buffer_head *bh = NULL;
1243 uint16_t ident;
6c79e987
MS		 1244 struct udf_sb_info *sbi = UDF_SB(sb);
1245 struct logicalVolIntegrityDesc *lvid;
1da177e4
LT		 1246
1247 while (loc.extLength > 0 &&
cb00ea35
CG		 1248 (bh = udf_read_tagged(sb, loc.extLocation,
1249 loc.extLocation, &ident)) &&
1250 ident == TAG_IDENT_LVID) {
6c79e987
MS		 1251 sbi->s_lvid_bh = bh;
1252 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
cb00ea35 1253
6c79e987 1254 if (lvid->nextIntegrityExt.extLength)
3a71fc5d 1255 udf_load_logicalvolint(sb,
6c79e987 1256 leea_to_cpu(lvid->nextIntegrityExt));
cb00ea35 1257
6c79e987 1258 if (sbi->s_lvid_bh != bh)
3bf25cb4 1259 brelse(bh);
1da177e4 1260 loc.extLength -= sb->s_blocksize;
cb00ea35 1261 loc.extLocation++;
1da177e4 1262 }
6c79e987 1263 if (sbi->s_lvid_bh != bh)
3bf25cb4 1264 brelse(bh);
1da177e4
LT		 1265}
1266
1267/*
1268 * udf_process_sequence
1269 *
1270 * PURPOSE
1271 * Process a main/reserve volume descriptor sequence.
1272 *
1273 * PRE-CONDITIONS
1274 * sb Pointer to _locked_ superblock.
1275 * block First block of first extent of the sequence.
1276 * lastblock Lastblock of first extent of the sequence.
1277 *
1278 * HISTORY
1279 * July 1, 1997 - Andrew E. Mileski
1280 * Written, tested, and released.
1281 */
3a71fc5d
MS		 1282static int udf_process_sequence(struct super_block *sb, long block,
1283 long lastblock, kernel_lb_addr *fileset)
1da177e4
LT		 1284{
1285 struct buffer_head *bh = NULL;
1286 struct udf_vds_record vds[VDS_POS_LENGTH];
4b11111a 1287 struct udf_vds_record *curr;
1da177e4
LT		 1288 struct generic_desc *gd;
1289 struct volDescPtr *vdp;
cb00ea35
CG		 1290 int done = 0;
1291 int i, j;
1da177e4
LT		 1292 uint32_t vdsn;
1293 uint16_t ident;
1294 long next_s = 0, next_e = 0;
1295
1296 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1297
1298 /* Read the main descriptor sequence */
cb00ea35 1299 for (; (!done && block <= lastblock); block++) {
1da177e4
LT		 1300
1301 bh = udf_read_tagged(sb, block, block, &ident);
cb00ea35 1302 if (!bh)
1da177e4
LT		 1303 break;
1304
1305 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1306 gd = (struct generic_desc *)bh->b_data;
1307 vdsn = le32_to_cpu(gd->volDescSeqNum);
cb00ea35 1308 switch (ident) {
28de7948 1309 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
4b11111a
MS		 1310 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1311 if (vdsn >= curr->volDescSeqNum) {
1312 curr->volDescSeqNum = vdsn;
1313 curr->block = block;
cb00ea35
CG		 1314 }
1315 break;
28de7948 1316 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
4b11111a
MS		 1317 curr = &vds[VDS_POS_VOL_DESC_PTR];
1318 if (vdsn >= curr->volDescSeqNum) {
1319 curr->volDescSeqNum = vdsn;
1320 curr->block = block;
cb00ea35
CG		 1321
1322 vdp = (struct volDescPtr *)bh->b_data;
4b11111a
MS		 1323 next_s = le32_to_cpu(
1324 vdp->nextVolDescSeqExt.extLocation);
1325 next_e = le32_to_cpu(
1326 vdp->nextVolDescSeqExt.extLength);
cb00ea35
CG		 1327 next_e = next_e >> sb->s_blocksize_bits;
1328 next_e += next_s;
1329 }
1330 break;
28de7948 1331 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
4b11111a
MS		 1332 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1333 if (vdsn >= curr->volDescSeqNum) {
1334 curr->volDescSeqNum = vdsn;
1335 curr->block = block;
cb00ea35
CG		 1336 }
1337 break;
28de7948 1338 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
4b11111a
MS		 1339 curr = &vds[VDS_POS_PARTITION_DESC];
1340 if (!curr->block)
1341 curr->block = block;
cb00ea35 1342 break;
28de7948 1343 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
4b11111a
MS		 1344 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1345 if (vdsn >= curr->volDescSeqNum) {
1346 curr->volDescSeqNum = vdsn;
1347 curr->block = block;
cb00ea35
CG		 1348 }
1349 break;
28de7948 1350 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
4b11111a
MS		 1351 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1352 if (vdsn >= curr->volDescSeqNum) {
1353 curr->volDescSeqNum = vdsn;
1354 curr->block = block;
cb00ea35
CG		 1355 }
1356 break;
28de7948 1357 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
cb00ea35
CG		 1358 vds[VDS_POS_TERMINATING_DESC].block = block;
1359 if (next_e) {
1360 block = next_s;
1361 lastblock = next_e;
1362 next_s = next_e = 0;
4b11111a 1363 } else
cb00ea35
CG		 1364 done = 1;
1365 break;
1da177e4 1366 }
3bf25cb4 1367 brelse(bh);
1da177e4 1368 }
cb00ea35
CG		 1369 for (i = 0; i < VDS_POS_LENGTH; i++) {
1370 if (vds[i].block) {
3a71fc5d
MS		 1371 bh = udf_read_tagged(sb, vds[i].block, vds[i].block,
1372 &ident);
1da177e4 1373
28de7948 1374 if (i == VDS_POS_PRIMARY_VOL_DESC) {
1da177e4 1375 udf_load_pvoldesc(sb, bh);
28de7948 1376 } else if (i == VDS_POS_LOGICAL_VOL_DESC) {
deae6cfc
MS		 1377 if (udf_load_logicalvol(sb, bh, fileset)) {
1378 brelse(bh);
1379 return 1;
1380 }
28de7948 1381 } else if (i == VDS_POS_PARTITION_DESC) {
1da177e4 1382 struct buffer_head *bh2 = NULL;
bcec4477
JK		 1383 if (udf_load_partdesc(sb, bh)) {
1384 brelse(bh);
1385 return 1;
1386 }
3a71fc5d
MS		 1387 for (j = vds[i].block + 1;
1388 j < vds[VDS_POS_TERMINATING_DESC].block;
1389 j++) {
1da177e4
LT		 1390 bh2 = udf_read_tagged(sb, j, j, &ident);
1391 gd = (struct generic_desc *)bh2->b_data;
1392 if (ident == TAG_IDENT_PD)
3a71fc5d
MS		 1393 if (udf_load_partdesc(sb,
1394 bh2)) {
bcec4477
JK		 1395 brelse(bh);
1396 brelse(bh2);
1397 return 1;
1398 }
3bf25cb4 1399 brelse(bh2);
1da177e4
LT		 1400 }
1401 }
3bf25cb4 1402 brelse(bh);
1da177e4
LT		 1403 }
1404 }
1405
1406 return 0;
1407}
1408
1409/*
1410 * udf_check_valid()
1411 */
cb00ea35 1412static int udf_check_valid(struct super_block *sb, int novrs, int silent)
1da177e4
LT		 1413{
1414 long block;
1415
cb00ea35 1416 if (novrs) {
1da177e4
LT		 1417 udf_debug("Validity check skipped because of novrs option\n");
1418 return 0;
1419 }
1420 /* Check that it is NSR02 compliant */
1421 /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
3a71fc5d
MS		 1422 else {
1423 block = udf_vrs(sb, silent);
1424 if (block == -1) {
6c79e987 1425 struct udf_sb_info *sbi = UDF_SB(sb);
3a71fc5d
MS		 1426 udf_debug("Failed to read byte 32768. Assuming open "
1427 "disc. Skipping validity check\n");
6c79e987
MS		 1428 if (!sbi->s_last_block)
1429 sbi->s_last_block = udf_get_last_block(sb);
3a71fc5d
MS		 1430 return 0;
1431 } else
1432 return !block;
28de7948 1433 }
1da177e4
LT		 1434}
1435
28de7948 1436static int udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset)
1da177e4
LT		 1437{
1438 struct anchorVolDescPtr *anchor;
1439 uint16_t ident;
1440 struct buffer_head *bh;
1441 long main_s, main_e, reserve_s, reserve_e;
1442 int i, j;
6c79e987 1443 struct udf_sb_info *sbi;
1da177e4
LT		 1444
1445 if (!sb)
1446 return 1;
6c79e987 1447 sbi = UDF_SB(sb);
1da177e4 1448
6c79e987
MS		 1449 for (i = 0; i < ARRAY_SIZE(sbi->s_anchor); i++) {
1450 if (sbi->s_anchor[i] &&
1451 (bh = udf_read_tagged(sb, sbi->s_anchor[i],
1452 sbi->s_anchor[i], &ident))) {
1da177e4
LT		 1453 anchor = (struct anchorVolDescPtr *)bh->b_data;
1454
1455 /* Locate the main sequence */
4b11111a
MS		 1456 main_s = le32_to_cpu(
1457 anchor->mainVolDescSeqExt.extLocation);
1458 main_e = le32_to_cpu(
1459 anchor->mainVolDescSeqExt.extLength);
1da177e4
LT		 1460 main_e = main_e >> sb->s_blocksize_bits;
1461 main_e += main_s;
e8c96f8c 1462
1da177e4 1463 /* Locate the reserve sequence */
4b11111a
MS		 1464 reserve_s = le32_to_cpu(
1465 anchor->reserveVolDescSeqExt.extLocation);
1466 reserve_e = le32_to_cpu(
1467 anchor->reserveVolDescSeqExt.extLength);
1da177e4
LT		 1468 reserve_e = reserve_e >> sb->s_blocksize_bits;
1469 reserve_e += reserve_s;
1470
3bf25cb4 1471 brelse(bh);
1da177e4
LT		 1472
1473 /* Process the main & reserve sequences */
1474 /* responsible for finding the PartitionDesc(s) */
4b11111a
MS		 1475 if (!(udf_process_sequence(sb, main_s, main_e,
1476 fileset) &&
1477 udf_process_sequence(sb, reserve_s, reserve_e,
1478 fileset)))
1da177e4 1479 break;
1da177e4
LT		 1480 }
1481 }
1482
6c79e987 1483 if (i == ARRAY_SIZE(sbi->s_anchor)) {
1da177e4
LT		 1484 udf_debug("No Anchor block found\n");
1485 return 1;
e8c96f8c 1486 } else
6c79e987 1487 udf_debug("Using anchor in block %d\n", sbi->s_anchor[i]);
1da177e4 1488
6c79e987 1489 for (i = 0; i < sbi->s_partitions; i++) {
28de7948 1490 kernel_lb_addr uninitialized_var(ino);
6c79e987
MS		 1491 struct udf_part_map *map = &sbi->s_partmaps[i];
1492 switch (map->s_partition_type) {
cb00ea35
CG		 1493 case UDF_VIRTUAL_MAP15:
1494 case UDF_VIRTUAL_MAP20:
6c79e987
MS		 1495 if (!sbi->s_last_block) {
1496 sbi->s_last_block = udf_get_last_block(sb);
28de7948
CG		 1497 udf_find_anchor(sb);
1498 }
1da177e4 1499
6c79e987 1500 if (!sbi->s_last_block) {
28de7948 1501 udf_debug("Unable to determine Lastblock (For "
b1e7a4b1 1502 "Virtual Partition)\n");
28de7948
CG		 1503 return 1;
1504 }
1da177e4 1505
6c79e987
MS		 1506 for (j = 0; j < sbi->s_partitions; j++) {
1507 struct udf_part_map *map2 = &sbi->s_partmaps[j];
b1e7a4b1 1508 if (j != i &&
4b11111a
MS		 1509 map->s_volumeseqnum ==
1510 map2->s_volumeseqnum &&
1511 map->s_partition_num ==
1512 map2->s_partition_num) {
28de7948 1513 ino.partitionReferenceNum = j;
4b11111a
MS		 1514 ino.logicalBlockNum =
1515 sbi->s_last_block -
1516 map2->s_partition_root;
28de7948 1517 break;
1da177e4 1518 }
28de7948 1519 }
1da177e4 1520
6c79e987 1521 if (j == sbi->s_partitions)
28de7948 1522 return 1;
1da177e4 1523
6c79e987
MS		 1524 sbi->s_vat_inode = udf_iget(sb, ino);
1525 if (!sbi->s_vat_inode)
28de7948 1526 return 1;
1da177e4 1527
6c79e987
MS		 1528 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
1529 map->s_type_specific.s_virtual.s_start_offset =
1530 udf_ext0_offset(sbi->s_vat_inode);
1531 map->s_type_specific.s_virtual.s_num_entries =
1532 (sbi->s_vat_inode->i_size - 36) >> 2;
1533 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
28de7948 1534 uint32_t pos;
4b11111a 1535 struct virtualAllocationTable20 *vat20;
1da177e4 1536
6c79e987 1537 pos = udf_block_map(sbi->s_vat_inode, 0);
28de7948
CG		 1538 bh = sb_bread(sb, pos);
1539 if (!bh)
1540 return 1;
4b11111a
MS		 1541 vat20 = (struct virtualAllocationTable20 *)
1542 bh->b_data +
1543 udf_ext0_offset(sbi->s_vat_inode);
6c79e987 1544 map->s_type_specific.s_virtual.s_start_offset =
4b11111a 1545 le16_to_cpu(vat20->lengthHeader) +
6c79e987 1546 udf_ext0_offset(sbi->s_vat_inode);
4b11111a
MS		 1547 map->s_type_specific.s_virtual.s_num_entries =
1548 (sbi->s_vat_inode->i_size -
1549 map->s_type_specific.s_virtual.
1550 s_start_offset) >> 2;
28de7948 1551 brelse(bh);
1da177e4 1552 }
6c79e987
MS		 1553 map->s_partition_root = udf_get_pblock(sb, 0, i, 0);
1554 map->s_partition_len =
1555 sbi->s_partmaps[ino.partitionReferenceNum].
1556 s_partition_len;
1da177e4
LT		 1557 }
1558 }
1559 return 0;
1560}
1561
1562static void udf_open_lvid(struct super_block *sb)
1563{
6c79e987
MS		 1564 struct udf_sb_info *sbi = UDF_SB(sb);
1565 struct buffer_head *bh = sbi->s_lvid_bh;
1566 if (bh) {
1da177e4 1567 kernel_timestamp cpu_time;
4b11111a
MS		 1568 struct logicalVolIntegrityDesc *lvid =
1569 (struct logicalVolIntegrityDesc *)bh->b_data;
1570 struct logicalVolIntegrityDescImpUse *lvidiu =
1571 udf_sb_lvidiu(sbi);
1da177e4 1572
6c79e987
MS		 1573 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1574 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1da177e4 1575 if (udf_time_to_stamp(&cpu_time, CURRENT_TIME))
6c79e987
MS		 1576 lvid->recordingDateAndTime = cpu_to_lets(cpu_time);
1577 lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN;
1da177e4 1578
4b11111a
MS		 1579 lvid->descTag.descCRC = cpu_to_le16(
1580 udf_crc((char *)lvid + sizeof(tag),
1581 le16_to_cpu(lvid->descTag.descCRCLength),
1582 0));
1da177e4 1583
3f2587bb 1584 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
6c79e987 1585 mark_buffer_dirty(bh);
1da177e4
LT		 1586 }
1587}
1588
1589static void udf_close_lvid(struct super_block *sb)
1590{
28de7948 1591 kernel_timestamp cpu_time;
6c79e987
MS		 1592 struct udf_sb_info *sbi = UDF_SB(sb);
1593 struct buffer_head *bh = sbi->s_lvid_bh;
1594 struct logicalVolIntegrityDesc *lvid;
28de7948 1595
6c79e987
MS		 1596 if (!bh)
1597 return;
1598
1599 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1600
1601 if (lvid->integrityType == LVID_INTEGRITY_TYPE_OPEN) {
4b11111a
MS		 1602 struct logicalVolIntegrityDescImpUse *lvidiu =
1603 udf_sb_lvidiu(sbi);
6c79e987
MS		 1604 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1605 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1da177e4 1606 if (udf_time_to_stamp(&cpu_time, CURRENT_TIME))
6c79e987
MS		 1607 lvid->recordingDateAndTime = cpu_to_lets(cpu_time);
1608 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
4b11111a
MS		 1609 lvidiu->maxUDFWriteRev =
1610 cpu_to_le16(UDF_MAX_WRITE_VERSION);
6c79e987
MS		 1611 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1612 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1613 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1614 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1615 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1616
4b11111a
MS		 1617 lvid->descTag.descCRC = cpu_to_le16(
1618 udf_crc((char *)lvid + sizeof(tag),
1619 le16_to_cpu(lvid->descTag.descCRCLength),
1620 0));
6c79e987 1621
3f2587bb 1622 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
6c79e987 1623 mark_buffer_dirty(bh);
1da177e4
LT		 1624 }
1625}
1626
66e1da3f
MS		 1627static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1628{
1629 int i;
1630 int nr_groups = bitmap->s_nr_groups;
4b11111a
MS		 1631 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1632 nr_groups);
66e1da3f
MS		 1633
1634 for (i = 0; i < nr_groups; i++)
1635 if (bitmap->s_block_bitmap[i])
1636 brelse(bitmap->s_block_bitmap[i]);
1637
1638 if (size <= PAGE_SIZE)
1639 kfree(bitmap);
1640 else
1641 vfree(bitmap);
1642}
1643
1da177e4
LT		 1644/*
1645 * udf_read_super
1646 *
1647 * PURPOSE
1648 * Complete the specified super block.
1649 *
1650 * PRE-CONDITIONS
1651 * sb Pointer to superblock to complete - never NULL.
1652 * sb->s_dev Device to read suberblock from.
1653 * options Pointer to mount options.
1654 * silent Silent flag.
1655 *
1656 * HISTORY
1657 * July 1, 1997 - Andrew E. Mileski
1658 * Written, tested, and released.
1659 */
1660static int udf_fill_super(struct super_block *sb, void *options, int silent)
1661{
1662 int i;
cb00ea35 1663 struct inode *inode = NULL;
1da177e4
LT		 1664 struct udf_options uopt;
1665 kernel_lb_addr rootdir, fileset;
1666 struct udf_sb_info *sbi;
1667
1668 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1669 uopt.uid = -1;
1670 uopt.gid = -1;
1671 uopt.umask = 0;
1672
6c79e987 1673 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1da177e4
LT		 1674 if (!sbi)
1675 return -ENOMEM;
28de7948 1676
1da177e4 1677 sb->s_fs_info = sbi;
1da177e4 1678
1e7933de 1679 mutex_init(&sbi->s_alloc_mutex);
1da177e4
LT		 1680
1681 if (!udf_parse_options((char *)options, &uopt))
1682 goto error_out;
1683
1684 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
cb00ea35 1685 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
1da177e4 1686 udf_error(sb, "udf_read_super",
cb00ea35 1687 "utf8 cannot be combined with iocharset\n");
1da177e4
LT		 1688 goto error_out;
1689 }
1690#ifdef CONFIG_UDF_NLS
cb00ea35 1691 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
1da177e4
LT		 1692 uopt.nls_map = load_nls_default();
1693 if (!uopt.nls_map)
1694 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1695 else
1696 udf_debug("Using default NLS map\n");
1697 }
1698#endif
1699 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1700 uopt.flags |= (1 << UDF_FLAG_UTF8);
1701
1702 fileset.logicalBlockNum = 0xFFFFFFFF;
1703 fileset.partitionReferenceNum = 0xFFFF;
1704
6c79e987
MS		 1705 sbi->s_flags = uopt.flags;
1706 sbi->s_uid = uopt.uid;
1707 sbi->s_gid = uopt.gid;
1708 sbi->s_umask = uopt.umask;
1709 sbi->s_nls_map = uopt.nls_map;
1da177e4
LT		 1710
1711 /* Set the block size for all transfers */
1712 if (!udf_set_blocksize(sb, uopt.blocksize))
1713 goto error_out;
1714
cb00ea35 1715 if (uopt.session == 0xFFFFFFFF)
6c79e987 1716 sbi->s_session = udf_get_last_session(sb);
1da177e4 1717 else
6c79e987 1718 sbi->s_session = uopt.session;
1da177e4 1719
6c79e987 1720 udf_debug("Multi-session=%d\n", sbi->s_session);
1da177e4 1721
6c79e987
MS		 1722 sbi->s_last_block = uopt.lastblock;
1723 sbi->s_anchor[0] = sbi->s_anchor[1] = 0;
1724 sbi->s_anchor[2] = uopt.anchor;
1725 sbi->s_anchor[3] = 256;
1da177e4 1726
3a71fc5d
MS		 1727 if (udf_check_valid(sb, uopt.novrs, silent)) {
1728 /* read volume recognition sequences */
1729 printk(KERN_WARNING "UDF-fs: No VRS found\n");
cb00ea35 1730 goto error_out;
1da177e4
LT		 1731 }
1732
1733 udf_find_anchor(sb);
1734
1735 /* Fill in the rest of the superblock */
1736 sb->s_op = &udf_sb_ops;
1737 sb->dq_op = NULL;
1738 sb->s_dirt = 0;
1739 sb->s_magic = UDF_SUPER_MAGIC;
1740 sb->s_time_gran = 1000;
1741
cb00ea35 1742 if (udf_load_partition(sb, &fileset)) {
3a71fc5d 1743 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
1da177e4
LT		 1744 goto error_out;
1745 }
1746
6c79e987 1747 udf_debug("Lastblock=%d\n", sbi->s_last_block);
1da177e4 1748
6c79e987 1749 if (sbi->s_lvid_bh) {
4b11111a
MS		 1750 struct logicalVolIntegrityDescImpUse *lvidiu =
1751 udf_sb_lvidiu(sbi);
6c79e987
MS		 1752 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1753 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
4b11111a
MS		 1754 /* uint16_t maxUDFWriteRev =
1755 le16_to_cpu(lvidiu->maxUDFWriteRev); */
1da177e4 1756
cb00ea35 1757 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
4b11111a
MS		 1758 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
1759 "(max is %x)\n",
6c79e987 1760 le16_to_cpu(lvidiu->minUDFReadRev),
cb00ea35 1761 UDF_MAX_READ_VERSION);
1da177e4 1762 goto error_out;
4b11111a 1763 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
1da177e4 1764 sb->s_flags |= MS_RDONLY;
1da177e4 1765
6c79e987 1766 sbi->s_udfrev = minUDFWriteRev;
1da177e4
LT		 1767
1768 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
1769 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
1770 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
1771 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
1772 }
1773
6c79e987 1774 if (!sbi->s_partitions) {
3a71fc5d 1775 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
1da177e4
LT		 1776 goto error_out;
1777 }
1778
4b11111a
MS		 1779 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
1780 UDF_PART_FLAG_READ_ONLY) {
1781 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
1782 "forcing readonly mount\n");
39b3f6d6 1783 sb->s_flags |= MS_RDONLY;
c1a26e7d 1784 }
39b3f6d6 1785
cb00ea35 1786 if (udf_find_fileset(sb, &fileset, &rootdir)) {
3a71fc5d 1787 printk(KERN_WARNING "UDF-fs: No fileset found\n");
1da177e4
LT		 1788 goto error_out;
1789 }
1790
cb00ea35 1791 if (!silent) {
1da177e4 1792 kernel_timestamp ts;
6c79e987 1793 udf_time_to_stamp(&ts, sbi->s_record_time);
28de7948
CG		 1794 udf_info("UDF %s (%s) Mounting volume '%s', "
1795 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
1796 UDFFS_VERSION, UDFFS_DATE,
6c79e987
MS		 1797 sbi->s_volume_ident, ts.year, ts.month, ts.day,
1798 ts.hour, ts.minute, ts.typeAndTimezone);
1da177e4
LT		 1799 }
1800 if (!(sb->s_flags & MS_RDONLY))
1801 udf_open_lvid(sb);
1802
1803 /* Assign the root inode */
1804 /* assign inodes by physical block number */
1805 /* perhaps it's not extensible enough, but for now ... */
cb00ea35
CG		 1806 inode = udf_iget(sb, rootdir);
1807 if (!inode) {
4b11111a
MS		 1808 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
1809 "partition=%d\n",
cb00ea35 1810 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
1da177e4
LT		 1811 goto error_out;
1812 }
1813
1814 /* Allocate a dentry for the root inode */
1815 sb->s_root = d_alloc_root(inode);
cb00ea35 1816 if (!sb->s_root) {
3a71fc5d 1817 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
1da177e4
LT		 1818 iput(inode);
1819 goto error_out;
1820 }
31170b6a 1821 sb->s_maxbytes = MAX_LFS_FILESIZE;
1da177e4
LT		 1822 return 0;
1823
28de7948 1824error_out:
6c79e987
MS		 1825 if (sbi->s_vat_inode)
1826 iput(sbi->s_vat_inode);
1827 if (sbi->s_partitions) {
1828 struct udf_part_map *map = &sbi->s_partmaps[sbi->s_partition];
1829 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1830 iput(map->s_uspace.s_table);
1831 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1832 iput(map->s_fspace.s_table);
1833 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
66e1da3f 1834 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
6c79e987 1835 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
66e1da3f 1836 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
6c79e987 1837 if (map->s_partition_type == UDF_SPARABLE_MAP15)
cb00ea35 1838 for (i = 0; i < 4; i++)
4b11111a
MS		 1839 brelse(map->s_type_specific.s_sparing.
1840 s_spar_map[i]);
1da177e4
LT		 1841 }
1842#ifdef CONFIG_UDF_NLS
1843 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 1844 unload_nls(sbi->s_nls_map);
1da177e4
LT		 1845#endif
1846 if (!(sb->s_flags & MS_RDONLY))
1847 udf_close_lvid(sb);
6c79e987
MS		 1848 brelse(sbi->s_lvid_bh);
1849
1850 kfree(sbi->s_partmaps);
1da177e4
LT		 1851 kfree(sbi);
1852 sb->s_fs_info = NULL;
28de7948 1853
1da177e4
LT		 1854 return -EINVAL;
1855}
1856
1857void udf_error(struct super_block *sb, const char *function,
cb00ea35 1858 const char *fmt, ...)
1da177e4
LT		 1859{
1860 va_list args;
1861
cb00ea35 1862 if (!(sb->s_flags & MS_RDONLY)) {
1da177e4
LT		 1863 /* mark sb error */
1864 sb->s_dirt = 1;
1865 }
1866 va_start(args, fmt);
4a6e617a 1867 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1da177e4 1868 va_end(args);
3a71fc5d 1869 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
28de7948 1870 sb->s_id, function, error_buf);
1da177e4
LT		 1871}
1872
1873void udf_warning(struct super_block *sb, const char *function,
cb00ea35 1874 const char *fmt, ...)
1da177e4
LT		 1875{
1876 va_list args;
1877
cb00ea35 1878 va_start(args, fmt);
4a6e617a 1879 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
1da177e4
LT		 1880 va_end(args);
1881 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
cb00ea35 1882 sb->s_id, function, error_buf);
1da177e4
LT		 1883}
1884
1885/*
1886 * udf_put_super
1887 *
1888 * PURPOSE
1889 * Prepare for destruction of the superblock.
1890 *
1891 * DESCRIPTION
1892 * Called before the filesystem is unmounted.
1893 *
1894 * HISTORY
1895 * July 1, 1997 - Andrew E. Mileski
1896 * Written, tested, and released.
1897 */
cb00ea35 1898static void udf_put_super(struct super_block *sb)
1da177e4
LT		 1899{
1900 int i;
6c79e987 1901 struct udf_sb_info *sbi;
1da177e4 1902
6c79e987
MS		 1903 sbi = UDF_SB(sb);
1904 if (sbi->s_vat_inode)
1905 iput(sbi->s_vat_inode);
1906 if (sbi->s_partitions) {
1907 struct udf_part_map *map = &sbi->s_partmaps[sbi->s_partition];
1908 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1909 iput(map->s_uspace.s_table);
1910 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1911 iput(map->s_fspace.s_table);
1912 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
66e1da3f 1913 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
6c79e987 1914 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
66e1da3f 1915 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
6c79e987 1916 if (map->s_partition_type == UDF_SPARABLE_MAP15)
cb00ea35 1917 for (i = 0; i < 4; i++)
4b11111a
MS		 1918 brelse(map->s_type_specific.s_sparing.
1919 s_spar_map[i]);
1da177e4
LT		 1920 }
1921#ifdef CONFIG_UDF_NLS
1922 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
6c79e987 1923 unload_nls(sbi->s_nls_map);
1da177e4
LT		 1924#endif
1925 if (!(sb->s_flags & MS_RDONLY))
1926 udf_close_lvid(sb);
6c79e987
MS		 1927 brelse(sbi->s_lvid_bh);
1928 kfree(sbi->s_partmaps);
1da177e4
LT		 1929 kfree(sb->s_fs_info);
1930 sb->s_fs_info = NULL;
1931}
1932
1933/*
1934 * udf_stat_fs
1935 *
1936 * PURPOSE
1937 * Return info about the filesystem.
1938 *
1939 * DESCRIPTION
1940 * Called by sys_statfs()
1941 *
1942 * HISTORY
1943 * July 1, 1997 - Andrew E. Mileski
1944 * Written, tested, and released.
1945 */
cb00ea35 1946static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1da177e4 1947{
726c3342 1948 struct super_block *sb = dentry->d_sb;
6c79e987
MS		 1949 struct udf_sb_info *sbi = UDF_SB(sb);
1950 struct logicalVolIntegrityDescImpUse *lvidiu;
1951
1952 if (sbi->s_lvid_bh != NULL)
1953 lvidiu = udf_sb_lvidiu(sbi);
1954 else
1955 lvidiu = NULL;
726c3342 1956
1da177e4
LT		 1957 buf->f_type = UDF_SUPER_MAGIC;
1958 buf->f_bsize = sb->s_blocksize;
6c79e987 1959 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
1da177e4
LT		 1960 buf->f_bfree = udf_count_free(sb);
1961 buf->f_bavail = buf->f_bfree;
6c79e987
MS		 1962 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
1963 le32_to_cpu(lvidiu->numDirs)) : 0)
1964 + buf->f_bfree;
1da177e4
LT		 1965 buf->f_ffree = buf->f_bfree;
1966 /* __kernel_fsid_t f_fsid */
cb00ea35 1967 buf->f_namelen = UDF_NAME_LEN - 2;
1da177e4
LT		 1968
1969 return 0;
1970}
1971
1972static unsigned char udf_bitmap_lookup[16] = {
1973 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4
1974};
1975
4b11111a
MS		 1976static unsigned int udf_count_free_bitmap(struct super_block *sb,
1977 struct udf_bitmap *bitmap)
1da177e4
LT		 1978{
1979 struct buffer_head *bh = NULL;
1980 unsigned int accum = 0;
1981 int index;
1982 int block = 0, newblock;
1983 kernel_lb_addr loc;
1984 uint32_t bytes;
1985 uint8_t value;
1986 uint8_t *ptr;
1987 uint16_t ident;
1988 struct spaceBitmapDesc *bm;
1989
1990 lock_kernel();
1991
1992 loc.logicalBlockNum = bitmap->s_extPosition;
6c79e987 1993 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
1da177e4
LT		 1994 bh = udf_read_ptagged(sb, loc, 0, &ident);
1995
cb00ea35 1996 if (!bh) {
1da177e4
LT		 1997 printk(KERN_ERR "udf: udf_count_free failed\n");
1998 goto out;
cb00ea35 1999 } else if (ident != TAG_IDENT_SBD) {
3bf25cb4 2000 brelse(bh);
1da177e4
LT		 2001 printk(KERN_ERR "udf: udf_count_free failed\n");
2002 goto out;
2003 }
2004
2005 bm = (struct spaceBitmapDesc *)bh->b_data;
2006 bytes = le32_to_cpu(bm->numOfBytes);
28de7948
CG		 2007 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2008 ptr = (uint8_t *)bh->b_data;
1da177e4 2009
cb00ea35
CG		 2010 while (bytes > 0) {
2011 while ((bytes > 0) && (index < sb->s_blocksize)) {
1da177e4 2012 value = ptr[index];
cb00ea35
CG		 2013 accum += udf_bitmap_lookup[value & 0x0f];
2014 accum += udf_bitmap_lookup[value >> 4];
1da177e4
LT		 2015 index++;
2016 bytes--;
2017 }
cb00ea35 2018 if (bytes) {
3bf25cb4 2019 brelse(bh);
1da177e4
LT		 2020 newblock = udf_get_lb_pblock(sb, loc, ++block);
2021 bh = udf_tread(sb, newblock);
cb00ea35 2022 if (!bh) {
1da177e4
LT		 2023 udf_debug("read failed\n");
2024 goto out;
2025 }
2026 index = 0;
28de7948 2027 ptr = (uint8_t *)bh->b_data;
1da177e4
LT		 2028 }
2029 }
3bf25cb4 2030 brelse(bh);
1da177e4 2031
28de7948 2032out:
1da177e4
LT		 2033 unlock_kernel();
2034
2035 return accum;
2036}
2037
4b11111a
MS		 2038static unsigned int udf_count_free_table(struct super_block *sb,
2039 struct inode *table)
1da177e4
LT		 2040{
2041 unsigned int accum = 0;
ff116fc8
JK		 2042 uint32_t elen;
2043 kernel_lb_addr eloc;
1da177e4 2044 int8_t etype;
ff116fc8 2045 struct extent_position epos;
1da177e4
LT		 2046
2047 lock_kernel();
2048
c0b34438 2049 epos.block = UDF_I(table)->i_location;
ff116fc8
JK		 2050 epos.offset = sizeof(struct unallocSpaceEntry);
2051 epos.bh = NULL;
1da177e4 2052
3a71fc5d 2053 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
1da177e4 2054 accum += (elen >> table->i_sb->s_blocksize_bits);
3a71fc5d 2055
3bf25cb4 2056 brelse(epos.bh);
1da177e4
LT		 2057
2058 unlock_kernel();
2059
2060 return accum;
2061}
cb00ea35
CG		 2062
2063static unsigned int udf_count_free(struct super_block *sb)
1da177e4
LT		 2064{
2065 unsigned int accum = 0;
6c79e987
MS		 2066 struct udf_sb_info *sbi;
2067 struct udf_part_map *map;
1da177e4 2068
6c79e987
MS		 2069 sbi = UDF_SB(sb);
2070 if (sbi->s_lvid_bh) {
4b11111a
MS		 2071 struct logicalVolIntegrityDesc *lvid =
2072 (struct logicalVolIntegrityDesc *)
2073 sbi->s_lvid_bh->b_data;
6c79e987 2074 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
4b11111a
MS		 2075 accum = le32_to_cpu(
2076 lvid->freeSpaceTable[sbi->s_partition]);
1da177e4
LT		 2077 if (accum == 0xFFFFFFFF)
2078 accum = 0;
2079 }
2080 }
2081
2082 if (accum)
2083 return accum;
2084
6c79e987
MS		 2085 map = &sbi->s_partmaps[sbi->s_partition];
2086 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
28de7948 2087 accum += udf_count_free_bitmap(sb,
6c79e987 2088 map->s_uspace.s_bitmap);
1da177e4 2089 }
6c79e987 2090 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
28de7948 2091 accum += udf_count_free_bitmap(sb,
6c79e987 2092 map->s_fspace.s_bitmap);
1da177e4
LT		 2093 }
2094 if (accum)
2095 return accum;
2096
6c79e987 2097 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
28de7948 2098 accum += udf_count_free_table(sb,
6c79e987 2099 map->s_uspace.s_table);
1da177e4 2100 }
6c79e987 2101 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
28de7948 2102 accum += udf_count_free_table(sb,
6c79e987 2103 map->s_fspace.s_table);
1da177e4
LT		 2104 }
2105
2106 return accum;
2107}
Linux 6.x block layer and io_uring tree(s)