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