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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 * 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
Marcin Slusarz3a71fc52008-02-08 04:20:28 -080036 * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced
37 * vol descs. rewrote option handling based on isofs
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 * 12/20/98 find the free space bitmap (if it exists)
39 */
40
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070041#include "udfdecl.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#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>
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -080055#include <linux/errno.h>
Miklos Szeredi6da80892008-02-08 04:21:50 -080056#include <linux/mount.h>
57#include <linux/seq_file.h>
Marcin Slusarz01b954a2008-02-02 22:37:07 +010058#include <linux/bitmap.h>
Bob Copelandf845fce2008-04-17 09:47:48 +020059#include <linux/crc-itu-t.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#include <asm/byteorder.h>
61
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#include "udf_sb.h"
63#include "udf_i.h"
64
65#include <linux/init.h>
66#include <asm/uaccess.h>
67
68#define VDS_POS_PRIMARY_VOL_DESC 0
69#define VDS_POS_UNALLOC_SPACE_DESC 1
70#define VDS_POS_LOGICAL_VOL_DESC 2
71#define VDS_POS_PARTITION_DESC 3
72#define VDS_POS_IMP_USE_VOL_DESC 4
73#define VDS_POS_VOL_DESC_PTR 5
74#define VDS_POS_TERMINATING_DESC 6
75#define VDS_POS_LENGTH 7
76
Miklos Szeredi6da80892008-02-08 04:21:50 -080077#define UDF_DEFAULT_BLOCKSIZE 2048
78
Linus Torvalds1da177e2005-04-16 15:20:36 -070079static char error_buf[1024];
80
81/* These are the "meat" - everything else is stuffing */
82static int udf_fill_super(struct super_block *, void *, int);
83static void udf_put_super(struct super_block *);
Jan Kara146bca72009-03-16 18:27:37 +010084static int udf_sync_fs(struct super_block *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085static int udf_remount_fs(struct super_block *, int *, char *);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020086static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020087static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
88 struct kernel_lb_addr *);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070089static void udf_load_fileset(struct super_block *, struct buffer_head *,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020090 struct kernel_lb_addr *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091static void udf_open_lvid(struct super_block *);
92static void udf_close_lvid(struct super_block *);
93static unsigned int udf_count_free(struct super_block *);
David Howells726c3342006-06-23 02:02:58 -070094static int udf_statfs(struct dentry *, struct kstatfs *);
Miklos Szeredi6da80892008-02-08 04:21:50 -080095static int udf_show_options(struct seq_file *, struct vfsmount *);
Adrian Bunkb8145a72008-02-17 10:19:55 +020096static void udf_error(struct super_block *sb, const char *function,
97 const char *fmt, ...);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
Marcin Slusarz6c79e982008-02-08 04:20:30 -080099struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
100{
Marcin Slusarz4b111112008-02-08 04:20:36 -0800101 struct logicalVolIntegrityDesc *lvid =
102 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800103 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800104 __u32 offset = number_of_partitions * 2 *
105 sizeof(uint32_t)/sizeof(uint8_t);
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800106 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
107}
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109/* UDF filesystem type */
David Howells454e2392006-06-23 02:02:57 -0700110static int udf_get_sb(struct file_system_type *fs_type,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700111 int flags, const char *dev_name, void *data,
112 struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113{
David Howells454e2392006-06-23 02:02:57 -0700114 return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115}
116
117static struct file_system_type udf_fstype = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700118 .owner = THIS_MODULE,
119 .name = "udf",
120 .get_sb = udf_get_sb,
121 .kill_sb = kill_block_super,
122 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123};
124
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700125static struct kmem_cache *udf_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
127static struct inode *udf_alloc_inode(struct super_block *sb)
128{
129 struct udf_inode_info *ei;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800130 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 if (!ei)
132 return NULL;
Dan Bastone95f87972006-08-13 23:24:18 -0700133
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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 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
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700148static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700150 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
Christoph Lametera35afb82007-05-16 22:10:57 -0700152 ei->i_ext.i_data = NULL;
153 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154}
155
156static int init_inodecache(void)
157{
158 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
159 sizeof(struct udf_inode_info),
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700160 0, (SLAB_RECLAIM_ACCOUNT |
161 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900162 init_once);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700163 if (!udf_inode_cachep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 return -ENOMEM;
165 return 0;
166}
167
168static void destroy_inodecache(void)
169{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700170 kmem_cache_destroy(udf_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171}
172
173/* Superblock operations */
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800174static const struct super_operations udf_sb_ops = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700175 .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,
Jan Kara146bca72009-03-16 18:27:37 +0100181 .sync_fs = udf_sync_fs,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700182 .statfs = udf_statfs,
183 .remount_fs = udf_remount_fs,
Miklos Szeredi6da80892008-02-08 04:21:50 -0800184 .show_options = udf_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185};
186
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700187struct udf_options {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 unsigned char novrs;
189 unsigned int blocksize;
190 unsigned int session;
191 unsigned int lastblock;
192 unsigned int anchor;
193 unsigned int volume;
194 unsigned short partition;
195 unsigned int fileset;
196 unsigned int rootdir;
197 unsigned int flags;
198 mode_t umask;
199 gid_t gid;
200 uid_t uid;
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100201 mode_t fmode;
202 mode_t dmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 struct nls_table *nls_map;
204};
205
206static int __init init_udf_fs(void)
207{
208 int err;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700209
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 err = init_inodecache();
211 if (err)
212 goto out1;
213 err = register_filesystem(&udf_fstype);
214 if (err)
215 goto out;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700216
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 return 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700218
219out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 destroy_inodecache();
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700221
222out1:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 return err;
224}
225
226static void __exit exit_udf_fs(void)
227{
228 unregister_filesystem(&udf_fstype);
229 destroy_inodecache();
230}
231
232module_init(init_udf_fs)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700233module_exit(exit_udf_fs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -0800235static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
236{
237 struct udf_sb_info *sbi = UDF_SB(sb);
238
239 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
240 GFP_KERNEL);
241 if (!sbi->s_partmaps) {
Harvey Harrison8e24eea2008-04-30 00:55:09 -0700242 udf_error(sb, __func__,
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -0800243 "Unable to allocate space for %d partition maps",
244 count);
245 sbi->s_partitions = 0;
246 return -ENOMEM;
247 }
248
249 sbi->s_partitions = count;
250 return 0;
251}
252
Miklos Szeredi6da80892008-02-08 04:21:50 -0800253static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
254{
255 struct super_block *sb = mnt->mnt_sb;
256 struct udf_sb_info *sbi = UDF_SB(sb);
257
258 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
259 seq_puts(seq, ",nostrict");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +0100260 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
Miklos Szeredi6da80892008-02-08 04:21:50 -0800261 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
262 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
263 seq_puts(seq, ",unhide");
264 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
265 seq_puts(seq, ",undelete");
266 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
267 seq_puts(seq, ",noadinicb");
268 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
269 seq_puts(seq, ",shortad");
270 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
271 seq_puts(seq, ",uid=forget");
272 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
273 seq_puts(seq, ",uid=ignore");
274 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
275 seq_puts(seq, ",gid=forget");
276 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
277 seq_puts(seq, ",gid=ignore");
278 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
279 seq_printf(seq, ",uid=%u", sbi->s_uid);
280 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
281 seq_printf(seq, ",gid=%u", sbi->s_gid);
282 if (sbi->s_umask != 0)
283 seq_printf(seq, ",umask=%o", sbi->s_umask);
Marcin Slusarz87bc7302008-12-02 13:40:11 +0100284 if (sbi->s_fmode != UDF_INVALID_MODE)
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100285 seq_printf(seq, ",mode=%o", sbi->s_fmode);
Marcin Slusarz87bc7302008-12-02 13:40:11 +0100286 if (sbi->s_dmode != UDF_INVALID_MODE)
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100287 seq_printf(seq, ",dmode=%o", sbi->s_dmode);
Miklos Szeredi6da80892008-02-08 04:21:50 -0800288 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
289 seq_printf(seq, ",session=%u", sbi->s_session);
290 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
291 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
Jan Kara40346002009-03-19 16:21:38 +0100292 if (sbi->s_anchor != 0)
293 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
Miklos Szeredi6da80892008-02-08 04:21:50 -0800294 /*
295 * volume, partition, fileset and rootdir seem to be ignored
296 * currently
297 */
298 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
299 seq_puts(seq, ",utf8");
300 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
301 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
302
303 return 0;
304}
305
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306/*
307 * udf_parse_options
308 *
309 * PURPOSE
310 * Parse mount options.
311 *
312 * DESCRIPTION
313 * The following mount options are supported:
314 *
315 * gid= Set the default group.
316 * umask= Set the default umask.
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100317 * mode= Set the default file permissions.
318 * dmode= Set the default directory permissions.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 * uid= Set the default user.
320 * bs= Set the block size.
321 * unhide Show otherwise hidden files.
322 * undelete Show deleted files in lists.
323 * adinicb Embed data in the inode (default)
324 * noadinicb Don't embed data in the inode
325 * shortad Use short ad's
326 * longad Use long ad's (default)
327 * nostrict Unset strict conformance
328 * iocharset= Set the NLS character set
329 *
330 * The remaining are for debugging and disaster recovery:
331 *
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700332 * novrs Skip volume sequence recognition
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 *
334 * The following expect a offset from 0.
335 *
336 * session= Set the CDROM session (default= last session)
337 * anchor= Override standard anchor location. (default= 256)
338 * volume= Override the VolumeDesc location. (unused)
339 * partition= Override the PartitionDesc location. (unused)
340 * lastblock= Set the last block of the filesystem/
341 *
342 * The following expect a offset from the partition root.
343 *
344 * fileset= Override the fileset block location. (unused)
345 * rootdir= Override the root directory location. (unused)
346 * WARNING: overriding the rootdir to a non-directory may
347 * yield highly unpredictable results.
348 *
349 * PRE-CONDITIONS
350 * options Pointer to mount options string.
351 * uopts Pointer to mount options variable.
352 *
353 * POST-CONDITIONS
354 * <return> 1 Mount options parsed okay.
355 * <return> 0 Error parsing mount options.
356 *
357 * HISTORY
358 * July 1, 1997 - Andrew E. Mileski
359 * Written, tested, and released.
360 */
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700361
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362enum {
363 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
364 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
365 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
366 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
367 Opt_rootdir, Opt_utf8, Opt_iocharset,
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100368 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
369 Opt_fmode, Opt_dmode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370};
371
Steven Whitehousea447c092008-10-13 10:46:57 +0100372static const match_table_t tokens = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700373 {Opt_novrs, "novrs"},
374 {Opt_nostrict, "nostrict"},
375 {Opt_bs, "bs=%u"},
376 {Opt_unhide, "unhide"},
377 {Opt_undelete, "undelete"},
378 {Opt_noadinicb, "noadinicb"},
379 {Opt_adinicb, "adinicb"},
380 {Opt_shortad, "shortad"},
381 {Opt_longad, "longad"},
382 {Opt_uforget, "uid=forget"},
383 {Opt_uignore, "uid=ignore"},
384 {Opt_gforget, "gid=forget"},
385 {Opt_gignore, "gid=ignore"},
386 {Opt_gid, "gid=%u"},
387 {Opt_uid, "uid=%u"},
388 {Opt_umask, "umask=%o"},
389 {Opt_session, "session=%u"},
390 {Opt_lastblock, "lastblock=%u"},
391 {Opt_anchor, "anchor=%u"},
392 {Opt_volume, "volume=%u"},
393 {Opt_partition, "partition=%u"},
394 {Opt_fileset, "fileset=%u"},
395 {Opt_rootdir, "rootdir=%u"},
396 {Opt_utf8, "utf8"},
397 {Opt_iocharset, "iocharset=%s"},
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100398 {Opt_fmode, "mode=%o"},
399 {Opt_dmode, "dmode=%o"},
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700400 {Opt_err, NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401};
402
Miklos Szeredi6da80892008-02-08 04:21:50 -0800403static int udf_parse_options(char *options, struct udf_options *uopt,
404 bool remount)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405{
406 char *p;
407 int option;
408
409 uopt->novrs = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 uopt->partition = 0xFFFF;
411 uopt->session = 0xFFFFFFFF;
412 uopt->lastblock = 0;
413 uopt->anchor = 0;
414 uopt->volume = 0xFFFFFFFF;
415 uopt->rootdir = 0xFFFFFFFF;
416 uopt->fileset = 0xFFFFFFFF;
417 uopt->nls_map = NULL;
418
419 if (!options)
420 return 1;
421
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700422 while ((p = strsep(&options, ",")) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 substring_t args[MAX_OPT_ARGS];
424 int token;
425 if (!*p)
426 continue;
427
428 token = match_token(p, tokens, args);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700429 switch (token) {
430 case Opt_novrs:
431 uopt->novrs = 1;
Clemens Ladisch41368012009-03-06 09:16:49 +0100432 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700433 case Opt_bs:
434 if (match_int(&args[0], &option))
435 return 0;
436 uopt->blocksize = option;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +0100437 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700438 break;
439 case Opt_unhide:
440 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
441 break;
442 case Opt_undelete:
443 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
444 break;
445 case Opt_noadinicb:
446 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
447 break;
448 case Opt_adinicb:
449 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
450 break;
451 case Opt_shortad:
452 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
453 break;
454 case Opt_longad:
455 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
456 break;
457 case Opt_gid:
458 if (match_int(args, &option))
459 return 0;
460 uopt->gid = option;
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -0700461 uopt->flags |= (1 << UDF_FLAG_GID_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700462 break;
463 case Opt_uid:
464 if (match_int(args, &option))
465 return 0;
466 uopt->uid = option;
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -0700467 uopt->flags |= (1 << UDF_FLAG_UID_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700468 break;
469 case Opt_umask:
470 if (match_octal(args, &option))
471 return 0;
472 uopt->umask = option;
473 break;
474 case Opt_nostrict:
475 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
476 break;
477 case Opt_session:
478 if (match_int(args, &option))
479 return 0;
480 uopt->session = option;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800481 if (!remount)
482 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700483 break;
484 case Opt_lastblock:
485 if (match_int(args, &option))
486 return 0;
487 uopt->lastblock = option;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800488 if (!remount)
489 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700490 break;
491 case Opt_anchor:
492 if (match_int(args, &option))
493 return 0;
494 uopt->anchor = option;
495 break;
496 case Opt_volume:
497 if (match_int(args, &option))
498 return 0;
499 uopt->volume = option;
500 break;
501 case Opt_partition:
502 if (match_int(args, &option))
503 return 0;
504 uopt->partition = option;
505 break;
506 case Opt_fileset:
507 if (match_int(args, &option))
508 return 0;
509 uopt->fileset = option;
510 break;
511 case Opt_rootdir:
512 if (match_int(args, &option))
513 return 0;
514 uopt->rootdir = option;
515 break;
516 case Opt_utf8:
517 uopt->flags |= (1 << UDF_FLAG_UTF8);
518 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519#ifdef CONFIG_UDF_NLS
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700520 case Opt_iocharset:
521 uopt->nls_map = load_nls(args[0].from);
522 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
523 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524#endif
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700525 case Opt_uignore:
526 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
527 break;
528 case Opt_uforget:
529 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
530 break;
531 case Opt_gignore:
532 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
533 break;
534 case Opt_gforget:
535 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
536 break;
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100537 case Opt_fmode:
538 if (match_octal(args, &option))
539 return 0;
540 uopt->fmode = option & 0777;
541 break;
542 case Opt_dmode:
543 if (match_octal(args, &option))
544 return 0;
545 uopt->dmode = option & 0777;
546 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700547 default:
548 printk(KERN_ERR "udf: bad mount option \"%s\" "
549 "or missing value\n", p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 return 0;
551 }
552 }
553 return 1;
554}
555
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700556static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557{
558 struct udf_options uopt;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800559 struct udf_sb_info *sbi = UDF_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800561 uopt.flags = sbi->s_flags;
562 uopt.uid = sbi->s_uid;
563 uopt.gid = sbi->s_gid;
564 uopt.umask = sbi->s_umask;
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100565 uopt.fmode = sbi->s_fmode;
566 uopt.dmode = sbi->s_dmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567
Miklos Szeredi6da80892008-02-08 04:21:50 -0800568 if (!udf_parse_options(options, &uopt, true))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 return -EINVAL;
570
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200571 lock_kernel();
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800572 sbi->s_flags = uopt.flags;
573 sbi->s_uid = uopt.uid;
574 sbi->s_gid = uopt.gid;
575 sbi->s_umask = uopt.umask;
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100576 sbi->s_fmode = uopt.fmode;
577 sbi->s_dmode = uopt.dmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800579 if (sbi->s_lvid_bh) {
580 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 if (write_rev > UDF_MAX_WRITE_VERSION)
582 *flags |= MS_RDONLY;
583 }
584
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200585 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
586 unlock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 return 0;
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200588 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 if (*flags & MS_RDONLY)
590 udf_close_lvid(sb);
591 else
592 udf_open_lvid(sb);
593
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200594 unlock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 return 0;
596}
597
Jan Kara40346002009-03-19 16:21:38 +0100598/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
599/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
600static loff_t udf_check_vsd(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601{
602 struct volStructDesc *vsd = NULL;
Sebastian Manciuleaf4bcbbd2008-04-08 14:02:11 +0200603 loff_t sector = 32768;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 int sectorsize;
605 struct buffer_head *bh = NULL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700606 int nsr02 = 0;
607 int nsr03 = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800608 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800610 sbi = UDF_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 if (sb->s_blocksize < sizeof(struct volStructDesc))
612 sectorsize = sizeof(struct volStructDesc);
613 else
614 sectorsize = sb->s_blocksize;
615
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800616 sector += (sbi->s_session << sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617
618 udf_debug("Starting at sector %u (%ld byte sectors)\n",
Sebastian Manciulea706047a2008-04-14 17:13:01 +0200619 (unsigned int)(sector >> sb->s_blocksize_bits),
620 sb->s_blocksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 /* Process the sequence (if applicable) */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700622 for (; !nsr02 && !nsr03; sector += sectorsize) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 /* Read a block */
624 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
625 if (!bh)
626 break;
627
628 /* Look for ISO descriptors */
629 vsd = (struct volStructDesc *)(bh->b_data +
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800630 (sector & (sb->s_blocksize - 1)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700632 if (vsd->stdIdent[0] == 0) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700633 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 break;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800635 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
636 VSD_STD_ID_LEN)) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700637 switch (vsd->structType) {
638 case 0:
639 udf_debug("ISO9660 Boot Record found\n");
640 break;
641 case 1:
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800642 udf_debug("ISO9660 Primary Volume Descriptor "
643 "found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700644 break;
645 case 2:
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800646 udf_debug("ISO9660 Supplementary Volume "
647 "Descriptor found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700648 break;
649 case 3:
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800650 udf_debug("ISO9660 Volume Partition Descriptor "
651 "found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700652 break;
653 case 255:
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800654 udf_debug("ISO9660 Volume Descriptor Set "
655 "Terminator found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700656 break;
657 default:
658 udf_debug("ISO9660 VRS (%u) found\n",
659 vsd->structType);
660 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 }
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800662 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
663 VSD_STD_ID_LEN))
664 ; /* nothing */
665 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
666 VSD_STD_ID_LEN)) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700667 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 break;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800669 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
670 VSD_STD_ID_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 nsr02 = sector;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800672 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
673 VSD_STD_ID_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 nsr03 = sector;
Jan Kara3bf25cb2007-05-08 00:35:16 -0700675 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 }
677
678 if (nsr03)
679 return nsr03;
680 else if (nsr02)
681 return nsr02;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800682 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 return -1;
684 else
685 return 0;
686}
687
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800688static int udf_find_fileset(struct super_block *sb,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200689 struct kernel_lb_addr *fileset,
690 struct kernel_lb_addr *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691{
692 struct buffer_head *bh = NULL;
693 long lastblock;
694 uint16_t ident;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800695 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
697 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700698 fileset->partitionReferenceNum != 0xFFFF) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200699 bh = udf_read_ptagged(sb, fileset, 0, &ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700701 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 return 1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700703 } else if (ident != TAG_IDENT_FSD) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700704 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 return 1;
706 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700707
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 }
709
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800710 sbi = UDF_SB(sb);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800711 if (!bh) {
712 /* Search backwards through the partitions */
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200713 struct kernel_lb_addr newfileset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700715/* --> cvg: FIXME - is it reasonable? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 return 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700717
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800718 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700719 (newfileset.partitionReferenceNum != 0xFFFF &&
720 fileset->logicalBlockNum == 0xFFFFFFFF &&
721 fileset->partitionReferenceNum == 0xFFFF);
722 newfileset.partitionReferenceNum--) {
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800723 lastblock = sbi->s_partmaps
724 [newfileset.partitionReferenceNum]
725 .s_partition_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 newfileset.logicalBlockNum = 0;
727
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700728 do {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200729 bh = udf_read_ptagged(sb, &newfileset, 0,
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800730 &ident);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700731 if (!bh) {
732 newfileset.logicalBlockNum++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 continue;
734 }
735
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700736 switch (ident) {
737 case TAG_IDENT_SBD:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700738 {
739 struct spaceBitmapDesc *sp;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800740 sp = (struct spaceBitmapDesc *)
741 bh->b_data;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700742 newfileset.logicalBlockNum += 1 +
743 ((le32_to_cpu(sp->numOfBytes) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800744 sizeof(struct spaceBitmapDesc)
745 - 1) >> sb->s_blocksize_bits);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700746 brelse(bh);
747 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700749 case TAG_IDENT_FSD:
750 *fileset = newfileset;
751 break;
752 default:
753 newfileset.logicalBlockNum++;
754 brelse(bh);
755 bh = NULL;
756 break;
757 }
758 } while (newfileset.logicalBlockNum < lastblock &&
759 fileset->logicalBlockNum == 0xFFFFFFFF &&
760 fileset->partitionReferenceNum == 0xFFFF);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 }
762 }
763
764 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700765 fileset->partitionReferenceNum != 0xFFFF) && bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 udf_debug("Fileset at block=%d, partition=%d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700767 fileset->logicalBlockNum,
768 fileset->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800770 sbi->s_partition = fileset->partitionReferenceNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 udf_load_fileset(sb, bh, root);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700772 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 return 0;
774 }
775 return 1;
776}
777
Jan Karac0eb31e2008-04-01 16:50:35 +0200778static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779{
780 struct primaryVolDesc *pvoldesc;
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100781 struct ustr *instr, *outstr;
Jan Karac0eb31e2008-04-01 16:50:35 +0200782 struct buffer_head *bh;
783 uint16_t ident;
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100784 int ret = 1;
785
786 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
787 if (!instr)
788 return 1;
789
790 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
791 if (!outstr)
792 goto out1;
Jan Karac0eb31e2008-04-01 16:50:35 +0200793
794 bh = udf_read_tagged(sb, block, block, &ident);
795 if (!bh)
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100796 goto out2;
797
Jan Karac0eb31e2008-04-01 16:50:35 +0200798 BUG_ON(ident != TAG_IDENT_PVD);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799
800 pvoldesc = (struct primaryVolDesc *)bh->b_data;
801
Marcin Slusarz56774802008-02-10 11:25:31 +0100802 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
803 pvoldesc->recordingDateAndTime)) {
Marcin Slusarzaf15a292008-02-10 11:29:10 +0100804#ifdef UDFFS_DEBUG
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200805 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +0100806 udf_debug("recording time %04u/%02u/%02u"
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800807 " %02u:%02u (%x)\n",
Marcin Slusarzaf15a292008-02-10 11:29:10 +0100808 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
809 ts->minute, le16_to_cpu(ts->typeAndTimezone));
810#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 }
812
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100813 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
814 if (udf_CS0toUTF8(outstr, instr)) {
815 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
816 outstr->u_len > 31 ? 31 : outstr->u_len);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800817 udf_debug("volIdent[] = '%s'\n",
818 UDF_SB(sb)->s_volume_ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100821 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
822 if (udf_CS0toUTF8(outstr, instr))
823 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
Jan Karac0eb31e2008-04-01 16:50:35 +0200824
825 brelse(bh);
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100826 ret = 0;
827out2:
828 kfree(outstr);
829out1:
830 kfree(instr);
831 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832}
833
Jan Karabfb257a2008-04-08 20:37:21 +0200834static int udf_load_metadata_files(struct super_block *sb, int partition)
835{
836 struct udf_sb_info *sbi = UDF_SB(sb);
837 struct udf_part_map *map;
838 struct udf_meta_data *mdata;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200839 struct kernel_lb_addr addr;
Jan Karabfb257a2008-04-08 20:37:21 +0200840 int fe_error = 0;
841
842 map = &sbi->s_partmaps[partition];
843 mdata = &map->s_type_specific.s_metadata;
844
845 /* metadata address */
846 addr.logicalBlockNum = mdata->s_meta_file_loc;
847 addr.partitionReferenceNum = map->s_partition_num;
848
849 udf_debug("Metadata file location: block = %d part = %d\n",
850 addr.logicalBlockNum, addr.partitionReferenceNum);
851
Pekka Enberg97e961f2008-10-15 12:29:03 +0200852 mdata->s_metadata_fe = udf_iget(sb, &addr);
Jan Karabfb257a2008-04-08 20:37:21 +0200853
854 if (mdata->s_metadata_fe == NULL) {
855 udf_warning(sb, __func__, "metadata inode efe not found, "
856 "will try mirror inode.");
857 fe_error = 1;
858 } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type !=
859 ICBTAG_FLAG_AD_SHORT) {
860 udf_warning(sb, __func__, "metadata inode efe does not have "
861 "short allocation descriptors!");
862 fe_error = 1;
863 iput(mdata->s_metadata_fe);
864 mdata->s_metadata_fe = NULL;
865 }
866
867 /* mirror file entry */
868 addr.logicalBlockNum = mdata->s_mirror_file_loc;
869 addr.partitionReferenceNum = map->s_partition_num;
870
871 udf_debug("Mirror metadata file location: block = %d part = %d\n",
872 addr.logicalBlockNum, addr.partitionReferenceNum);
873
Pekka Enberg97e961f2008-10-15 12:29:03 +0200874 mdata->s_mirror_fe = udf_iget(sb, &addr);
Jan Karabfb257a2008-04-08 20:37:21 +0200875
876 if (mdata->s_mirror_fe == NULL) {
877 if (fe_error) {
878 udf_error(sb, __func__, "mirror inode efe not found "
879 "and metadata inode is missing too, exiting...");
880 goto error_exit;
881 } else
882 udf_warning(sb, __func__, "mirror inode efe not found,"
883 " but metadata inode is OK");
884 } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type !=
885 ICBTAG_FLAG_AD_SHORT) {
886 udf_warning(sb, __func__, "mirror inode efe does not have "
887 "short allocation descriptors!");
888 iput(mdata->s_mirror_fe);
889 mdata->s_mirror_fe = NULL;
890 if (fe_error)
891 goto error_exit;
892 }
893
894 /*
895 * bitmap file entry
896 * Note:
897 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
898 */
899 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
900 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
901 addr.partitionReferenceNum = map->s_partition_num;
902
903 udf_debug("Bitmap file location: block = %d part = %d\n",
904 addr.logicalBlockNum, addr.partitionReferenceNum);
905
Pekka Enberg97e961f2008-10-15 12:29:03 +0200906 mdata->s_bitmap_fe = udf_iget(sb, &addr);
Jan Karabfb257a2008-04-08 20:37:21 +0200907
908 if (mdata->s_bitmap_fe == NULL) {
909 if (sb->s_flags & MS_RDONLY)
910 udf_warning(sb, __func__, "bitmap inode efe "
911 "not found but it's ok since the disc"
912 " is mounted read-only");
913 else {
914 udf_error(sb, __func__, "bitmap inode efe not "
915 "found and attempted read-write mount");
916 goto error_exit;
917 }
918 }
919 }
920
921 udf_debug("udf_load_metadata_files Ok\n");
922
923 return 0;
924
925error_exit:
926 return 1;
927}
928
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700929static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200930 struct kernel_lb_addr *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931{
932 struct fileSetDesc *fset;
933
934 fset = (struct fileSetDesc *)bh->b_data;
935
936 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
937
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800938 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700940 udf_debug("Rootdir at block=%d, partition=%d\n",
941 root->logicalBlockNum, root->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942}
943
Marcin Slusarz883cb9d2008-02-08 04:20:34 -0800944int udf_compute_nr_groups(struct super_block *sb, u32 partition)
945{
946 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
Julia Lawall8dee00b2008-02-14 16:15:45 +0100947 return DIV_ROUND_UP(map->s_partition_len +
948 (sizeof(struct spaceBitmapDesc) << 3),
949 sb->s_blocksize * 8);
Marcin Slusarz883cb9d2008-02-08 04:20:34 -0800950}
951
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800952static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
953{
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800954 struct udf_bitmap *bitmap;
955 int nr_groups;
956 int size;
957
Marcin Slusarz883cb9d2008-02-08 04:20:34 -0800958 nr_groups = udf_compute_nr_groups(sb, index);
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800959 size = sizeof(struct udf_bitmap) +
960 (sizeof(struct buffer_head *) * nr_groups);
961
962 if (size <= PAGE_SIZE)
963 bitmap = kmalloc(size, GFP_KERNEL);
964 else
965 bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
966
967 if (bitmap == NULL) {
Harvey Harrison8e24eea2008-04-30 00:55:09 -0700968 udf_error(sb, __func__,
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800969 "Unable to allocate space for bitmap "
970 "and %d buffer_head pointers", nr_groups);
971 return NULL;
972 }
973
974 memset(bitmap, 0x00, size);
975 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
976 bitmap->s_nr_groups = nr_groups;
977 return bitmap;
978}
979
Jan Kara3fb38df2008-04-02 12:26:36 +0200980static int udf_fill_partdesc_info(struct super_block *sb,
981 struct partitionDesc *p, int p_index)
982{
983 struct udf_part_map *map;
984 struct udf_sb_info *sbi = UDF_SB(sb);
985 struct partitionHeaderDesc *phd;
986
987 map = &sbi->s_partmaps[p_index];
988
989 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
990 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
991
992 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
993 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
994 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
995 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
996 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
997 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
998 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
999 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1000
Sebastian Manciulea706047a2008-04-14 17:13:01 +02001001 udf_debug("Partition (%d type %x) starts at physical %d, "
1002 "block length %d\n", p_index,
Jan Kara3fb38df2008-04-02 12:26:36 +02001003 map->s_partition_type, map->s_partition_root,
1004 map->s_partition_len);
1005
1006 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1007 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1008 return 0;
1009
1010 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1011 if (phd->unallocSpaceTable.extLength) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001012 struct kernel_lb_addr loc = {
Jan Kara3fb38df2008-04-02 12:26:36 +02001013 .logicalBlockNum = le32_to_cpu(
1014 phd->unallocSpaceTable.extPosition),
1015 .partitionReferenceNum = p_index,
1016 };
1017
Pekka Enberg97e961f2008-10-15 12:29:03 +02001018 map->s_uspace.s_table = udf_iget(sb, &loc);
Jan Kara3fb38df2008-04-02 12:26:36 +02001019 if (!map->s_uspace.s_table) {
1020 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1021 p_index);
1022 return 1;
1023 }
1024 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1025 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1026 p_index, map->s_uspace.s_table->i_ino);
1027 }
1028
1029 if (phd->unallocSpaceBitmap.extLength) {
1030 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1031 if (!bitmap)
1032 return 1;
1033 map->s_uspace.s_bitmap = bitmap;
1034 bitmap->s_extLength = le32_to_cpu(
1035 phd->unallocSpaceBitmap.extLength);
1036 bitmap->s_extPosition = le32_to_cpu(
1037 phd->unallocSpaceBitmap.extPosition);
1038 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1039 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
1040 bitmap->s_extPosition);
1041 }
1042
1043 if (phd->partitionIntegrityTable.extLength)
1044 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1045
1046 if (phd->freedSpaceTable.extLength) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001047 struct kernel_lb_addr loc = {
Jan Kara3fb38df2008-04-02 12:26:36 +02001048 .logicalBlockNum = le32_to_cpu(
1049 phd->freedSpaceTable.extPosition),
1050 .partitionReferenceNum = p_index,
1051 };
1052
Pekka Enberg97e961f2008-10-15 12:29:03 +02001053 map->s_fspace.s_table = udf_iget(sb, &loc);
Jan Kara3fb38df2008-04-02 12:26:36 +02001054 if (!map->s_fspace.s_table) {
1055 udf_debug("cannot load freedSpaceTable (part %d)\n",
1056 p_index);
1057 return 1;
1058 }
1059
1060 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1061 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1062 p_index, map->s_fspace.s_table->i_ino);
1063 }
1064
1065 if (phd->freedSpaceBitmap.extLength) {
1066 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1067 if (!bitmap)
1068 return 1;
1069 map->s_fspace.s_bitmap = bitmap;
1070 bitmap->s_extLength = le32_to_cpu(
1071 phd->freedSpaceBitmap.extLength);
1072 bitmap->s_extPosition = le32_to_cpu(
1073 phd->freedSpaceBitmap.extPosition);
1074 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1075 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
1076 bitmap->s_extPosition);
1077 }
1078 return 0;
1079}
1080
Jan Kara38b74a52008-04-02 16:01:35 +02001081static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1082{
1083 struct udf_sb_info *sbi = UDF_SB(sb);
1084 struct udf_part_map *map = &sbi->s_partmaps[p_index];
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001085 struct kernel_lb_addr ino;
Jan Karafa5e0812008-04-08 02:08:53 +02001086 struct buffer_head *bh = NULL;
1087 struct udf_inode_info *vati;
1088 uint32_t pos;
1089 struct virtualAllocationTable20 *vat20;
Jan Kara4bf17af2009-07-14 19:30:23 +02001090 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
Jan Kara38b74a52008-04-02 16:01:35 +02001091
1092 /* VAT file entry is in the last recorded block */
1093 ino.partitionReferenceNum = type1_index;
1094 ino.logicalBlockNum = sbi->s_last_block - map->s_partition_root;
Pekka Enberg97e961f2008-10-15 12:29:03 +02001095 sbi->s_vat_inode = udf_iget(sb, &ino);
Jan Kara4bf17af2009-07-14 19:30:23 +02001096 if (!sbi->s_vat_inode &&
1097 sbi->s_last_block != blocks - 1) {
1098 printk(KERN_NOTICE "UDF-fs: Failed to read VAT inode from the"
1099 " last recorded block (%lu), retrying with the last "
1100 "block of the device (%lu).\n",
1101 (unsigned long)sbi->s_last_block,
1102 (unsigned long)blocks - 1);
1103 ino.partitionReferenceNum = type1_index;
1104 ino.logicalBlockNum = blocks - 1 - map->s_partition_root;
1105 sbi->s_vat_inode = udf_iget(sb, &ino);
1106 }
Jan Kara38b74a52008-04-02 16:01:35 +02001107 if (!sbi->s_vat_inode)
1108 return 1;
1109
1110 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
Sebastian Manciulea47c93582008-04-14 17:06:36 +02001111 map->s_type_specific.s_virtual.s_start_offset = 0;
Jan Kara38b74a52008-04-02 16:01:35 +02001112 map->s_type_specific.s_virtual.s_num_entries =
1113 (sbi->s_vat_inode->i_size - 36) >> 2;
1114 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
Jan Karafa5e0812008-04-08 02:08:53 +02001115 vati = UDF_I(sbi->s_vat_inode);
1116 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1117 pos = udf_block_map(sbi->s_vat_inode, 0);
1118 bh = sb_bread(sb, pos);
1119 if (!bh)
1120 return 1;
1121 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1122 } else {
1123 vat20 = (struct virtualAllocationTable20 *)
1124 vati->i_ext.i_data;
1125 }
Jan Kara38b74a52008-04-02 16:01:35 +02001126
Jan Kara38b74a52008-04-02 16:01:35 +02001127 map->s_type_specific.s_virtual.s_start_offset =
Sebastian Manciulea47c93582008-04-14 17:06:36 +02001128 le16_to_cpu(vat20->lengthHeader);
Jan Kara38b74a52008-04-02 16:01:35 +02001129 map->s_type_specific.s_virtual.s_num_entries =
1130 (sbi->s_vat_inode->i_size -
1131 map->s_type_specific.s_virtual.
1132 s_start_offset) >> 2;
1133 brelse(bh);
1134 }
1135 return 0;
1136}
1137
Jan Karac0eb31e2008-04-01 16:50:35 +02001138static int udf_load_partdesc(struct super_block *sb, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139{
Jan Karac0eb31e2008-04-01 16:50:35 +02001140 struct buffer_head *bh;
Jan Karac0eb31e2008-04-01 16:50:35 +02001141 struct partitionDesc *p;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001142 struct udf_part_map *map;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001143 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Kara38b74a52008-04-02 16:01:35 +02001144 int i, type1_idx;
Jan Karac0eb31e2008-04-01 16:50:35 +02001145 uint16_t partitionNumber;
1146 uint16_t ident;
1147 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148
Jan Karac0eb31e2008-04-01 16:50:35 +02001149 bh = udf_read_tagged(sb, block, block, &ident);
1150 if (!bh)
1151 return 1;
1152 if (ident != TAG_IDENT_PD)
1153 goto out_bh;
1154
1155 p = (struct partitionDesc *)bh->b_data;
1156 partitionNumber = le16_to_cpu(p->partitionNumber);
Jan Kara38b74a52008-04-02 16:01:35 +02001157
Jan Karabfb257a2008-04-08 20:37:21 +02001158 /* First scan for TYPE1, SPARABLE and METADATA partitions */
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001159 for (i = 0; i < sbi->s_partitions; i++) {
1160 map = &sbi->s_partmaps[i];
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001161 udf_debug("Searching map: (%d == %d)\n",
Marcin Slusarz165923f2008-02-10 11:33:08 +01001162 map->s_partition_num, partitionNumber);
Jan Kara38b74a52008-04-02 16:01:35 +02001163 if (map->s_partition_num == partitionNumber &&
1164 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1165 map->s_partition_type == UDF_SPARABLE_MAP15))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166 break;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001167 }
1168
Jan Kara38b74a52008-04-02 16:01:35 +02001169 if (i >= sbi->s_partitions) {
Marcin Slusarz165923f2008-02-10 11:33:08 +01001170 udf_debug("Partition (%d) not found in partition map\n",
1171 partitionNumber);
Jan Karac0eb31e2008-04-01 16:50:35 +02001172 goto out_bh;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001173 }
1174
Jan Kara3fb38df2008-04-02 12:26:36 +02001175 ret = udf_fill_partdesc_info(sb, p, i);
Jan Kara38b74a52008-04-02 16:01:35 +02001176
1177 /*
Jan Karabfb257a2008-04-08 20:37:21 +02001178 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1179 * PHYSICAL partitions are already set up
Jan Kara38b74a52008-04-02 16:01:35 +02001180 */
1181 type1_idx = i;
1182 for (i = 0; i < sbi->s_partitions; i++) {
1183 map = &sbi->s_partmaps[i];
1184
1185 if (map->s_partition_num == partitionNumber &&
1186 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
Jan Karabfb257a2008-04-08 20:37:21 +02001187 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1188 map->s_partition_type == UDF_METADATA_MAP25))
Jan Kara38b74a52008-04-02 16:01:35 +02001189 break;
1190 }
1191
1192 if (i >= sbi->s_partitions)
1193 goto out_bh;
1194
1195 ret = udf_fill_partdesc_info(sb, p, i);
1196 if (ret)
1197 goto out_bh;
1198
Jan Karabfb257a2008-04-08 20:37:21 +02001199 if (map->s_partition_type == UDF_METADATA_MAP25) {
1200 ret = udf_load_metadata_files(sb, i);
1201 if (ret) {
1202 printk(KERN_ERR "UDF-fs: error loading MetaData "
1203 "partition map %d\n", i);
1204 goto out_bh;
1205 }
1206 } else {
1207 ret = udf_load_vat(sb, i, type1_idx);
1208 if (ret)
1209 goto out_bh;
1210 /*
1211 * Mark filesystem read-only if we have a partition with
1212 * virtual map since we don't handle writing to it (we
1213 * overwrite blocks instead of relocating them).
1214 */
1215 sb->s_flags |= MS_RDONLY;
1216 printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only "
1217 "because writing to pseudooverwrite partition is "
1218 "not implemented.\n");
1219 }
Jan Karac0eb31e2008-04-01 16:50:35 +02001220out_bh:
Jan Kara2e0838f2008-04-01 18:08:51 +02001221 /* In case loading failed, we handle cleanup in udf_fill_super */
Jan Karac0eb31e2008-04-01 16:50:35 +02001222 brelse(bh);
1223 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224}
1225
Jan Karac0eb31e2008-04-01 16:50:35 +02001226static int udf_load_logicalvol(struct super_block *sb, sector_t block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001227 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228{
1229 struct logicalVolDesc *lvd;
1230 int i, j, offset;
1231 uint8_t type;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001232 struct udf_sb_info *sbi = UDF_SB(sb);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001233 struct genericPartitionMap *gpm;
Jan Karac0eb31e2008-04-01 16:50:35 +02001234 uint16_t ident;
1235 struct buffer_head *bh;
1236 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237
Jan Karac0eb31e2008-04-01 16:50:35 +02001238 bh = udf_read_tagged(sb, block, block, &ident);
1239 if (!bh)
1240 return 1;
1241 BUG_ON(ident != TAG_IDENT_LVD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 lvd = (struct logicalVolDesc *)bh->b_data;
1243
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -08001244 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
Jan Karac0eb31e2008-04-01 16:50:35 +02001245 if (i != 0) {
1246 ret = i;
1247 goto out_bh;
1248 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001250 for (i = 0, offset = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001251 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001252 i++, offset += gpm->partitionMapLength) {
1253 struct udf_part_map *map = &sbi->s_partmaps[i];
1254 gpm = (struct genericPartitionMap *)
1255 &(lvd->partitionMaps[offset]);
1256 type = gpm->partitionMapType;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001257 if (type == 1) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001258 struct genericPartitionMap1 *gpm1 =
1259 (struct genericPartitionMap1 *)gpm;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001260 map->s_partition_type = UDF_TYPE1_MAP15;
1261 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1262 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1263 map->s_partition_func = NULL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001264 } else if (type == 2) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001265 struct udfPartitionMap2 *upm2 =
1266 (struct udfPartitionMap2 *)gpm;
1267 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1268 strlen(UDF_ID_VIRTUAL))) {
1269 u16 suf =
1270 le16_to_cpu(((__le16 *)upm2->partIdent.
1271 identSuffix)[0]);
Jan Karac82a1272008-04-08 01:16:32 +02001272 if (suf < 0x0200) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001273 map->s_partition_type =
1274 UDF_VIRTUAL_MAP15;
1275 map->s_partition_func =
1276 udf_get_pblock_virt15;
Jan Karac82a1272008-04-08 01:16:32 +02001277 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001278 map->s_partition_type =
1279 UDF_VIRTUAL_MAP20;
1280 map->s_partition_func =
1281 udf_get_pblock_virt20;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 }
Marcin Slusarz4b111112008-02-08 04:20:36 -08001283 } else if (!strncmp(upm2->partIdent.ident,
1284 UDF_ID_SPARABLE,
1285 strlen(UDF_ID_SPARABLE))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286 uint32_t loc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287 struct sparingTable *st;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001288 struct sparablePartitionMap *spm =
1289 (struct sparablePartitionMap *)gpm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001291 map->s_partition_type = UDF_SPARABLE_MAP15;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001292 map->s_type_specific.s_sparing.s_packet_len =
1293 le16_to_cpu(spm->packetLength);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001294 for (j = 0; j < spm->numSparingTables; j++) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001295 struct buffer_head *bh2;
1296
1297 loc = le32_to_cpu(
1298 spm->locSparingTable[j]);
1299 bh2 = udf_read_tagged(sb, loc, loc,
1300 &ident);
1301 map->s_type_specific.s_sparing.
1302 s_spar_map[j] = bh2;
1303
Marcin Slusarz165923f2008-02-10 11:33:08 +01001304 if (bh2 == NULL)
1305 continue;
1306
1307 st = (struct sparingTable *)bh2->b_data;
1308 if (ident != 0 || strncmp(
1309 st->sparingIdent.ident,
1310 UDF_ID_SPARING,
1311 strlen(UDF_ID_SPARING))) {
1312 brelse(bh2);
1313 map->s_type_specific.s_sparing.
1314 s_spar_map[j] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 }
1316 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001317 map->s_partition_func = udf_get_pblock_spar15;
Jan Karabfb257a2008-04-08 20:37:21 +02001318 } else if (!strncmp(upm2->partIdent.ident,
1319 UDF_ID_METADATA,
1320 strlen(UDF_ID_METADATA))) {
1321 struct udf_meta_data *mdata =
1322 &map->s_type_specific.s_metadata;
1323 struct metadataPartitionMap *mdm =
1324 (struct metadataPartitionMap *)
1325 &(lvd->partitionMaps[offset]);
1326 udf_debug("Parsing Logical vol part %d "
1327 "type %d id=%s\n", i, type,
1328 UDF_ID_METADATA);
1329
1330 map->s_partition_type = UDF_METADATA_MAP25;
1331 map->s_partition_func = udf_get_pblock_meta25;
1332
1333 mdata->s_meta_file_loc =
1334 le32_to_cpu(mdm->metadataFileLoc);
1335 mdata->s_mirror_file_loc =
1336 le32_to_cpu(mdm->metadataMirrorFileLoc);
1337 mdata->s_bitmap_file_loc =
1338 le32_to_cpu(mdm->metadataBitmapFileLoc);
1339 mdata->s_alloc_unit_size =
1340 le32_to_cpu(mdm->allocUnitSize);
1341 mdata->s_align_unit_size =
1342 le16_to_cpu(mdm->alignUnitSize);
1343 mdata->s_dup_md_flag =
1344 mdm->flags & 0x01;
1345
1346 udf_debug("Metadata Ident suffix=0x%x\n",
1347 (le16_to_cpu(
1348 ((__le16 *)
1349 mdm->partIdent.identSuffix)[0])));
1350 udf_debug("Metadata part num=%d\n",
1351 le16_to_cpu(mdm->partitionNum));
1352 udf_debug("Metadata part alloc unit size=%d\n",
1353 le32_to_cpu(mdm->allocUnitSize));
1354 udf_debug("Metadata file loc=%d\n",
1355 le32_to_cpu(mdm->metadataFileLoc));
1356 udf_debug("Mirror file loc=%d\n",
1357 le32_to_cpu(mdm->metadataMirrorFileLoc));
1358 udf_debug("Bitmap file loc=%d\n",
1359 le32_to_cpu(mdm->metadataBitmapFileLoc));
1360 udf_debug("Duplicate Flag: %d %d\n",
1361 mdata->s_dup_md_flag, mdm->flags);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001362 } else {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001363 udf_debug("Unknown ident: %s\n",
1364 upm2->partIdent.ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365 continue;
1366 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001367 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1368 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 }
1370 udf_debug("Partition (%d:%d) type %d on volume %d\n",
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001371 i, map->s_partition_num, type,
1372 map->s_volumeseqnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373 }
1374
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001375 if (fileset) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001376 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377
1378 *fileset = lelb_to_cpu(la->extLocation);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001379 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1380 "partition=%d\n", fileset->logicalBlockNum,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001381 fileset->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382 }
1383 if (lvd->integritySeqExt.extLength)
1384 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001385
Jan Karac0eb31e2008-04-01 16:50:35 +02001386out_bh:
1387 brelse(bh);
1388 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389}
1390
1391/*
1392 * udf_load_logicalvolint
1393 *
1394 */
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001395static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396{
1397 struct buffer_head *bh = NULL;
1398 uint16_t ident;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001399 struct udf_sb_info *sbi = UDF_SB(sb);
1400 struct logicalVolIntegrityDesc *lvid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401
1402 while (loc.extLength > 0 &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001403 (bh = udf_read_tagged(sb, loc.extLocation,
1404 loc.extLocation, &ident)) &&
1405 ident == TAG_IDENT_LVID) {
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001406 sbi->s_lvid_bh = bh;
1407 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001408
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001409 if (lvid->nextIntegrityExt.extLength)
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001410 udf_load_logicalvolint(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001411 leea_to_cpu(lvid->nextIntegrityExt));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001412
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001413 if (sbi->s_lvid_bh != bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001414 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415 loc.extLength -= sb->s_blocksize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001416 loc.extLocation++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001418 if (sbi->s_lvid_bh != bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001419 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420}
1421
1422/*
1423 * udf_process_sequence
1424 *
1425 * PURPOSE
1426 * Process a main/reserve volume descriptor sequence.
1427 *
1428 * PRE-CONDITIONS
1429 * sb Pointer to _locked_ superblock.
1430 * block First block of first extent of the sequence.
1431 * lastblock Lastblock of first extent of the sequence.
1432 *
1433 * HISTORY
1434 * July 1, 1997 - Andrew E. Mileski
1435 * Written, tested, and released.
1436 */
Jan Kara200a3592008-03-04 13:03:09 +01001437static noinline int udf_process_sequence(struct super_block *sb, long block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001438 long lastblock, struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439{
1440 struct buffer_head *bh = NULL;
1441 struct udf_vds_record vds[VDS_POS_LENGTH];
Marcin Slusarz4b111112008-02-08 04:20:36 -08001442 struct udf_vds_record *curr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443 struct generic_desc *gd;
1444 struct volDescPtr *vdp;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001445 int done = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 uint32_t vdsn;
1447 uint16_t ident;
1448 long next_s = 0, next_e = 0;
1449
1450 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1451
Jan Karac0eb31e2008-04-01 16:50:35 +02001452 /*
1453 * Read the main descriptor sequence and find which descriptors
1454 * are in it.
1455 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001456 for (; (!done && block <= lastblock); block++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457
1458 bh = udf_read_tagged(sb, block, block, &ident);
Jan Karac0eb31e2008-04-01 16:50:35 +02001459 if (!bh) {
1460 printk(KERN_ERR "udf: Block %Lu of volume descriptor "
1461 "sequence is corrupted or we could not read "
1462 "it.\n", (unsigned long long)block);
1463 return 1;
1464 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465
1466 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1467 gd = (struct generic_desc *)bh->b_data;
1468 vdsn = le32_to_cpu(gd->volDescSeqNum);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001469 switch (ident) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001470 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001471 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1472 if (vdsn >= curr->volDescSeqNum) {
1473 curr->volDescSeqNum = vdsn;
1474 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001475 }
1476 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001477 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001478 curr = &vds[VDS_POS_VOL_DESC_PTR];
1479 if (vdsn >= curr->volDescSeqNum) {
1480 curr->volDescSeqNum = vdsn;
1481 curr->block = block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001483 vdp = (struct volDescPtr *)bh->b_data;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001484 next_s = le32_to_cpu(
1485 vdp->nextVolDescSeqExt.extLocation);
1486 next_e = le32_to_cpu(
1487 vdp->nextVolDescSeqExt.extLength);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001488 next_e = next_e >> sb->s_blocksize_bits;
1489 next_e += next_s;
1490 }
1491 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001492 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001493 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1494 if (vdsn >= curr->volDescSeqNum) {
1495 curr->volDescSeqNum = vdsn;
1496 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001497 }
1498 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001499 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001500 curr = &vds[VDS_POS_PARTITION_DESC];
1501 if (!curr->block)
1502 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001503 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001504 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001505 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1506 if (vdsn >= curr->volDescSeqNum) {
1507 curr->volDescSeqNum = vdsn;
1508 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001509 }
1510 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001511 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001512 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1513 if (vdsn >= curr->volDescSeqNum) {
1514 curr->volDescSeqNum = vdsn;
1515 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001516 }
1517 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001518 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001519 vds[VDS_POS_TERMINATING_DESC].block = block;
1520 if (next_e) {
1521 block = next_s;
1522 lastblock = next_e;
1523 next_s = next_e = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001524 } else
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001525 done = 1;
1526 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07001528 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529 }
Jan Karac0eb31e2008-04-01 16:50:35 +02001530 /*
1531 * Now read interesting descriptors again and process them
1532 * in a suitable order
1533 */
1534 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1535 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n");
1536 return 1;
1537 }
1538 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1539 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540
Jan Karac0eb31e2008-04-01 16:50:35 +02001541 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1542 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1543 return 1;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001544
Jan Karac0eb31e2008-04-01 16:50:35 +02001545 if (vds[VDS_POS_PARTITION_DESC].block) {
1546 /*
1547 * We rescan the whole descriptor sequence to find
1548 * partition descriptor blocks and process them.
1549 */
1550 for (block = vds[VDS_POS_PARTITION_DESC].block;
1551 block < vds[VDS_POS_TERMINATING_DESC].block;
1552 block++)
1553 if (udf_load_partdesc(sb, block))
Marcin Slusarz165923f2008-02-10 11:33:08 +01001554 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555 }
1556
1557 return 0;
1558}
1559
Jan Kara40346002009-03-19 16:21:38 +01001560static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1561 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562{
Jan Kara40346002009-03-19 16:21:38 +01001563 struct anchorVolDescPtr *anchor;
1564 long main_s, main_e, reserve_s, reserve_e;
1565 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566
Jan Kara40346002009-03-19 16:21:38 +01001567 sbi = UDF_SB(sb);
1568 anchor = (struct anchorVolDescPtr *)bh->b_data;
1569
1570 /* Locate the main sequence */
1571 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1572 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1573 main_e = main_e >> sb->s_blocksize_bits;
1574 main_e += main_s;
1575
1576 /* Locate the reserve sequence */
1577 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1578 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1579 reserve_e = reserve_e >> sb->s_blocksize_bits;
1580 reserve_e += reserve_s;
1581
1582 /* Process the main & reserve sequences */
1583 /* responsible for finding the PartitionDesc(s) */
1584 if (!udf_process_sequence(sb, main_s, main_e, fileset))
1585 return 1;
1586 return !udf_process_sequence(sb, reserve_s, reserve_e, fileset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587}
1588
Jan Kara40346002009-03-19 16:21:38 +01001589/*
1590 * Check whether there is an anchor block in the given block and
1591 * load Volume Descriptor Sequence if so.
1592 */
1593static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1594 struct kernel_lb_addr *fileset)
1595{
1596 struct buffer_head *bh;
1597 uint16_t ident;
1598 int ret;
1599
1600 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1601 udf_fixed_to_variable(block) >=
1602 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1603 return 0;
1604
1605 bh = udf_read_tagged(sb, block, block, &ident);
1606 if (!bh)
1607 return 0;
1608 if (ident != TAG_IDENT_AVDP) {
1609 brelse(bh);
1610 return 0;
1611 }
1612 ret = udf_load_sequence(sb, bh, fileset);
1613 brelse(bh);
1614 return ret;
1615}
1616
1617/* Search for an anchor volume descriptor pointer */
1618static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
1619 struct kernel_lb_addr *fileset)
1620{
1621 sector_t last[6];
1622 int i;
1623 struct udf_sb_info *sbi = UDF_SB(sb);
1624 int last_count = 0;
1625
1626 /* First try user provided anchor */
1627 if (sbi->s_anchor) {
1628 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
1629 return lastblock;
1630 }
1631 /*
1632 * according to spec, anchor is in either:
1633 * block 256
1634 * lastblock-256
1635 * lastblock
1636 * however, if the disc isn't closed, it could be 512.
1637 */
1638 if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
1639 return lastblock;
1640 /*
1641 * The trouble is which block is the last one. Drives often misreport
1642 * this so we try various possibilities.
1643 */
1644 last[last_count++] = lastblock;
1645 if (lastblock >= 1)
1646 last[last_count++] = lastblock - 1;
1647 last[last_count++] = lastblock + 1;
1648 if (lastblock >= 2)
1649 last[last_count++] = lastblock - 2;
1650 if (lastblock >= 150)
1651 last[last_count++] = lastblock - 150;
1652 if (lastblock >= 152)
1653 last[last_count++] = lastblock - 152;
1654
1655 for (i = 0; i < last_count; i++) {
1656 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1657 sb->s_blocksize_bits)
1658 continue;
1659 if (udf_check_anchor_block(sb, last[i], fileset))
1660 return last[i];
1661 if (last[i] < 256)
1662 continue;
1663 if (udf_check_anchor_block(sb, last[i] - 256, fileset))
1664 return last[i];
1665 }
1666
1667 /* Finally try block 512 in case media is open */
1668 if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
1669 return last[0];
1670 return 0;
1671}
1672
1673/*
1674 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1675 * area specified by it. The function expects sbi->s_lastblock to be the last
1676 * block on the media.
1677 *
1678 * Return 1 if ok, 0 if not found.
1679 *
1680 */
1681static int udf_find_anchor(struct super_block *sb,
1682 struct kernel_lb_addr *fileset)
1683{
1684 sector_t lastblock;
1685 struct udf_sb_info *sbi = UDF_SB(sb);
1686
1687 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1688 if (lastblock)
1689 goto out;
1690
1691 /* No anchor found? Try VARCONV conversion of block numbers */
1692 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1693 /* Firstly, we try to not convert number of the last block */
1694 lastblock = udf_scan_anchors(sb,
1695 udf_variable_to_fixed(sbi->s_last_block),
1696 fileset);
1697 if (lastblock)
1698 goto out;
1699
1700 /* Secondly, we try with converted number of the last block */
1701 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1702 if (!lastblock) {
1703 /* VARCONV didn't help. Clear it. */
1704 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1705 return 0;
1706 }
1707out:
1708 sbi->s_last_block = lastblock;
1709 return 1;
1710}
1711
1712/*
1713 * Check Volume Structure Descriptor, find Anchor block and load Volume
1714 * Descriptor Sequence
1715 */
1716static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1717 int silent, struct kernel_lb_addr *fileset)
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001718{
1719 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Kara40346002009-03-19 16:21:38 +01001720 loff_t nsr_off;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001721
1722 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1723 if (!silent)
1724 printk(KERN_WARNING "UDF-fs: Bad block size\n");
1725 return 0;
1726 }
1727 sbi->s_last_block = uopt->lastblock;
Jan Kara40346002009-03-19 16:21:38 +01001728 if (!uopt->novrs) {
1729 /* Check that it is NSR02 compliant */
1730 nsr_off = udf_check_vsd(sb);
1731 if (!nsr_off) {
1732 if (!silent)
1733 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1734 return 0;
1735 }
1736 if (nsr_off == -1)
1737 udf_debug("Failed to read byte 32768. Assuming open "
1738 "disc. Skipping validity check\n");
1739 if (!sbi->s_last_block)
1740 sbi->s_last_block = udf_get_last_block(sb);
1741 } else {
1742 udf_debug("Validity check skipped because of novrs option\n");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001743 }
Jan Kara40346002009-03-19 16:21:38 +01001744
1745 /* Look for anchor block and load Volume Descriptor Sequence */
1746 sbi->s_anchor = uopt->anchor;
1747 if (!udf_find_anchor(sb, fileset)) {
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001748 if (!silent)
1749 printk(KERN_WARNING "UDF-fs: No anchor found\n");
1750 return 0;
1751 }
1752 return 1;
1753}
1754
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755static void udf_open_lvid(struct super_block *sb)
1756{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001757 struct udf_sb_info *sbi = UDF_SB(sb);
1758 struct buffer_head *bh = sbi->s_lvid_bh;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001759 struct logicalVolIntegrityDesc *lvid;
1760 struct logicalVolIntegrityDescImpUse *lvidiu;
Jan Kara146bca72009-03-16 18:27:37 +01001761
Marcin Slusarz165923f2008-02-10 11:33:08 +01001762 if (!bh)
1763 return;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001764 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1765 lvidiu = udf_sb_lvidiu(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766
Marcin Slusarz165923f2008-02-10 11:33:08 +01001767 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1768 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1769 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1770 CURRENT_TIME);
Jan Kara146bca72009-03-16 18:27:37 +01001771 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001772
Marcin Slusarz165923f2008-02-10 11:33:08 +01001773 lvid->descTag.descCRC = cpu_to_le16(
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001774 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001775 le16_to_cpu(lvid->descTag.descCRCLength)));
Marcin Slusarz165923f2008-02-10 11:33:08 +01001776
1777 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1778 mark_buffer_dirty(bh);
Jan Kara146bca72009-03-16 18:27:37 +01001779 sbi->s_lvid_dirty = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780}
1781
1782static void udf_close_lvid(struct super_block *sb)
1783{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001784 struct udf_sb_info *sbi = UDF_SB(sb);
1785 struct buffer_head *bh = sbi->s_lvid_bh;
1786 struct logicalVolIntegrityDesc *lvid;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001787 struct logicalVolIntegrityDescImpUse *lvidiu;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001788
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001789 if (!bh)
1790 return;
1791
1792 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001793 lvidiu = udf_sb_lvidiu(sbi);
1794 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1795 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1796 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1797 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1798 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1799 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1800 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1801 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1802 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1803 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804
Marcin Slusarz165923f2008-02-10 11:33:08 +01001805 lvid->descTag.descCRC = cpu_to_le16(
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001806 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001807 le16_to_cpu(lvid->descTag.descCRCLength)));
Marcin Slusarz165923f2008-02-10 11:33:08 +01001808
1809 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1810 mark_buffer_dirty(bh);
Jan Kara146bca72009-03-16 18:27:37 +01001811 sbi->s_lvid_dirty = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812}
1813
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001814static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1815{
1816 int i;
1817 int nr_groups = bitmap->s_nr_groups;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001818 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1819 nr_groups);
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001820
1821 for (i = 0; i < nr_groups; i++)
1822 if (bitmap->s_block_bitmap[i])
1823 brelse(bitmap->s_block_bitmap[i]);
1824
1825 if (size <= PAGE_SIZE)
1826 kfree(bitmap);
1827 else
1828 vfree(bitmap);
1829}
1830
Jan Kara2e0838f2008-04-01 18:08:51 +02001831static void udf_free_partition(struct udf_part_map *map)
1832{
1833 int i;
Jan Karabfb257a2008-04-08 20:37:21 +02001834 struct udf_meta_data *mdata;
Jan Kara2e0838f2008-04-01 18:08:51 +02001835
1836 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1837 iput(map->s_uspace.s_table);
1838 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1839 iput(map->s_fspace.s_table);
1840 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1841 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1842 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1843 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1844 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1845 for (i = 0; i < 4; i++)
1846 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
Jan Karabfb257a2008-04-08 20:37:21 +02001847 else if (map->s_partition_type == UDF_METADATA_MAP25) {
1848 mdata = &map->s_type_specific.s_metadata;
1849 iput(mdata->s_metadata_fe);
1850 mdata->s_metadata_fe = NULL;
1851
1852 iput(mdata->s_mirror_fe);
1853 mdata->s_mirror_fe = NULL;
1854
1855 iput(mdata->s_bitmap_fe);
1856 mdata->s_bitmap_fe = NULL;
1857 }
Jan Kara2e0838f2008-04-01 18:08:51 +02001858}
1859
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860static int udf_fill_super(struct super_block *sb, void *options, int silent)
1861{
1862 int i;
Jan Kara40346002009-03-19 16:21:38 +01001863 int ret;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001864 struct inode *inode = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865 struct udf_options uopt;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001866 struct kernel_lb_addr rootdir, fileset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001867 struct udf_sb_info *sbi;
1868
1869 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1870 uopt.uid = -1;
1871 uopt.gid = -1;
1872 uopt.umask = 0;
Marcin Slusarz87bc7302008-12-02 13:40:11 +01001873 uopt.fmode = UDF_INVALID_MODE;
1874 uopt.dmode = UDF_INVALID_MODE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001876 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001877 if (!sbi)
1878 return -ENOMEM;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001879
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880 sb->s_fs_info = sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881
Ingo Molnar1e7933d2006-03-23 03:00:44 -08001882 mutex_init(&sbi->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883
Miklos Szeredi6da80892008-02-08 04:21:50 -08001884 if (!udf_parse_options((char *)options, &uopt, false))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885 goto error_out;
1886
1887 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001888 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889 udf_error(sb, "udf_read_super",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001890 "utf8 cannot be combined with iocharset\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891 goto error_out;
1892 }
1893#ifdef CONFIG_UDF_NLS
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001894 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001895 uopt.nls_map = load_nls_default();
1896 if (!uopt.nls_map)
1897 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1898 else
1899 udf_debug("Using default NLS map\n");
1900 }
1901#endif
1902 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1903 uopt.flags |= (1 << UDF_FLAG_UTF8);
1904
1905 fileset.logicalBlockNum = 0xFFFFFFFF;
1906 fileset.partitionReferenceNum = 0xFFFF;
1907
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001908 sbi->s_flags = uopt.flags;
1909 sbi->s_uid = uopt.uid;
1910 sbi->s_gid = uopt.gid;
1911 sbi->s_umask = uopt.umask;
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +01001912 sbi->s_fmode = uopt.fmode;
1913 sbi->s_dmode = uopt.dmode;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001914 sbi->s_nls_map = uopt.nls_map;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001915
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001916 if (uopt.session == 0xFFFFFFFF)
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001917 sbi->s_session = udf_get_last_session(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918 else
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001919 sbi->s_session = uopt.session;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001921 udf_debug("Multi-session=%d\n", sbi->s_session);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923 /* Fill in the rest of the superblock */
1924 sb->s_op = &udf_sb_ops;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001925 sb->s_export_op = &udf_export_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001926 sb->dq_op = NULL;
1927 sb->s_dirt = 0;
1928 sb->s_magic = UDF_SUPER_MAGIC;
1929 sb->s_time_gran = 1000;
1930
Jan Kara40346002009-03-19 16:21:38 +01001931 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
1932 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1933 } else {
Martin K. Petersene1defc42009-05-22 17:17:49 -04001934 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
Jan Kara40346002009-03-19 16:21:38 +01001935 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1936 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1937 if (!silent)
1938 printk(KERN_NOTICE
1939 "UDF-fs: Rescanning with blocksize "
1940 "%d\n", UDF_DEFAULT_BLOCKSIZE);
1941 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
1942 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1943 }
1944 }
1945 if (!ret) {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001946 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947 goto error_out;
1948 }
1949
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001950 udf_debug("Lastblock=%d\n", sbi->s_last_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001952 if (sbi->s_lvid_bh) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001953 struct logicalVolIntegrityDescImpUse *lvidiu =
1954 udf_sb_lvidiu(sbi);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001955 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1956 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001957 /* uint16_t maxUDFWriteRev =
1958 le16_to_cpu(lvidiu->maxUDFWriteRev); */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001960 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001961 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
1962 "(max is %x)\n",
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001963 le16_to_cpu(lvidiu->minUDFReadRev),
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001964 UDF_MAX_READ_VERSION);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965 goto error_out;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001966 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001967 sb->s_flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001969 sbi->s_udfrev = minUDFWriteRev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970
1971 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
1972 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
1973 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
1974 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
1975 }
1976
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001977 if (!sbi->s_partitions) {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001978 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001979 goto error_out;
1980 }
1981
Marcin Slusarz4b111112008-02-08 04:20:36 -08001982 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
1983 UDF_PART_FLAG_READ_ONLY) {
1984 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
1985 "forcing readonly mount\n");
Eric Sandeen39b3f6d2006-09-29 01:59:41 -07001986 sb->s_flags |= MS_RDONLY;
Peter Osterlundc1a26e72006-10-05 21:17:50 +02001987 }
Eric Sandeen39b3f6d2006-09-29 01:59:41 -07001988
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001989 if (udf_find_fileset(sb, &fileset, &rootdir)) {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001990 printk(KERN_WARNING "UDF-fs: No fileset found\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001991 goto error_out;
1992 }
1993
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001994 if (!silent) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001995 struct timestamp ts;
Marcin Slusarz56774802008-02-10 11:25:31 +01001996 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
Adrian Bunka9ca6632008-02-08 04:20:47 -08001997 udf_info("UDF: Mounting volume '%s', "
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001998 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
Marcin Slusarz56774802008-02-10 11:25:31 +01001999 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
2000 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002001 }
2002 if (!(sb->s_flags & MS_RDONLY))
2003 udf_open_lvid(sb);
2004
2005 /* Assign the root inode */
2006 /* assign inodes by physical block number */
2007 /* perhaps it's not extensible enough, but for now ... */
Pekka Enberg97e961f2008-10-15 12:29:03 +02002008 inode = udf_iget(sb, &rootdir);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002009 if (!inode) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002010 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
2011 "partition=%d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002012 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013 goto error_out;
2014 }
2015
2016 /* Allocate a dentry for the root inode */
2017 sb->s_root = d_alloc_root(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002018 if (!sb->s_root) {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002019 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002020 iput(inode);
2021 goto error_out;
2022 }
Jan Kara31170b62007-05-08 00:35:21 -07002023 sb->s_maxbytes = MAX_LFS_FILESIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002024 return 0;
2025
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002026error_out:
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002027 if (sbi->s_vat_inode)
2028 iput(sbi->s_vat_inode);
Jan Kara2e0838f2008-04-01 18:08:51 +02002029 if (sbi->s_partitions)
2030 for (i = 0; i < sbi->s_partitions; i++)
2031 udf_free_partition(&sbi->s_partmaps[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032#ifdef CONFIG_UDF_NLS
2033 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002034 unload_nls(sbi->s_nls_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002035#endif
2036 if (!(sb->s_flags & MS_RDONLY))
2037 udf_close_lvid(sb);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002038 brelse(sbi->s_lvid_bh);
2039
2040 kfree(sbi->s_partmaps);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041 kfree(sbi);
2042 sb->s_fs_info = NULL;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002043
Linus Torvalds1da177e2005-04-16 15:20:36 -07002044 return -EINVAL;
2045}
2046
Adrian Bunkb8145a72008-02-17 10:19:55 +02002047static void udf_error(struct super_block *sb, const char *function,
2048 const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049{
2050 va_list args;
2051
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002052 if (!(sb->s_flags & MS_RDONLY)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002053 /* mark sb error */
2054 sb->s_dirt = 1;
2055 }
2056 va_start(args, fmt);
Alexey Dobriyan4a6e6172006-12-06 20:37:04 -08002057 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 va_end(args);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002059 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002060 sb->s_id, function, error_buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061}
2062
2063void udf_warning(struct super_block *sb, const char *function,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002064 const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065{
2066 va_list args;
2067
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002068 va_start(args, fmt);
Alexey Dobriyan4a6e6172006-12-06 20:37:04 -08002069 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002070 va_end(args);
2071 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002072 sb->s_id, function, error_buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002073}
2074
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002075static void udf_put_super(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076{
2077 int i;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002078 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002080 sbi = UDF_SB(sb);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +02002081
2082 lock_kernel();
2083
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002084 if (sbi->s_vat_inode)
2085 iput(sbi->s_vat_inode);
Jan Kara2e0838f2008-04-01 18:08:51 +02002086 if (sbi->s_partitions)
2087 for (i = 0; i < sbi->s_partitions; i++)
2088 udf_free_partition(&sbi->s_partmaps[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089#ifdef CONFIG_UDF_NLS
2090 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002091 unload_nls(sbi->s_nls_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002092#endif
2093 if (!(sb->s_flags & MS_RDONLY))
2094 udf_close_lvid(sb);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002095 brelse(sbi->s_lvid_bh);
2096 kfree(sbi->s_partmaps);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097 kfree(sb->s_fs_info);
2098 sb->s_fs_info = NULL;
Christoph Hellwig6cfd0142009-05-05 15:40:36 +02002099
2100 unlock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101}
2102
Jan Kara146bca72009-03-16 18:27:37 +01002103static int udf_sync_fs(struct super_block *sb, int wait)
2104{
2105 struct udf_sb_info *sbi = UDF_SB(sb);
2106
2107 mutex_lock(&sbi->s_alloc_mutex);
2108 if (sbi->s_lvid_dirty) {
2109 /*
2110 * Blockdevice will be synced later so we don't have to submit
2111 * the buffer for IO
2112 */
2113 mark_buffer_dirty(sbi->s_lvid_bh);
2114 sb->s_dirt = 0;
2115 sbi->s_lvid_dirty = 0;
2116 }
2117 mutex_unlock(&sbi->s_alloc_mutex);
2118
2119 return 0;
2120}
2121
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002122static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123{
David Howells726c3342006-06-23 02:02:58 -07002124 struct super_block *sb = dentry->d_sb;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002125 struct udf_sb_info *sbi = UDF_SB(sb);
2126 struct logicalVolIntegrityDescImpUse *lvidiu;
Coly Li557f5a12009-01-20 01:36:55 +08002127 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002128
2129 if (sbi->s_lvid_bh != NULL)
2130 lvidiu = udf_sb_lvidiu(sbi);
2131 else
2132 lvidiu = NULL;
David Howells726c3342006-06-23 02:02:58 -07002133
Linus Torvalds1da177e2005-04-16 15:20:36 -07002134 buf->f_type = UDF_SUPER_MAGIC;
2135 buf->f_bsize = sb->s_blocksize;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002136 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137 buf->f_bfree = udf_count_free(sb);
2138 buf->f_bavail = buf->f_bfree;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002139 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2140 le32_to_cpu(lvidiu->numDirs)) : 0)
2141 + buf->f_bfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142 buf->f_ffree = buf->f_bfree;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002143 buf->f_namelen = UDF_NAME_LEN - 2;
Coly Li557f5a12009-01-20 01:36:55 +08002144 buf->f_fsid.val[0] = (u32)id;
2145 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002146
2147 return 0;
2148}
2149
Marcin Slusarz4b111112008-02-08 04:20:36 -08002150static unsigned int udf_count_free_bitmap(struct super_block *sb,
2151 struct udf_bitmap *bitmap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002152{
2153 struct buffer_head *bh = NULL;
2154 unsigned int accum = 0;
2155 int index;
2156 int block = 0, newblock;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002157 struct kernel_lb_addr loc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158 uint32_t bytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002159 uint8_t *ptr;
2160 uint16_t ident;
2161 struct spaceBitmapDesc *bm;
2162
2163 lock_kernel();
2164
2165 loc.logicalBlockNum = bitmap->s_extPosition;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002166 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
Pekka Enberg97e961f2008-10-15 12:29:03 +02002167 bh = udf_read_ptagged(sb, &loc, 0, &ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002168
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002169 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170 printk(KERN_ERR "udf: udf_count_free failed\n");
2171 goto out;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002172 } else if (ident != TAG_IDENT_SBD) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002173 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174 printk(KERN_ERR "udf: udf_count_free failed\n");
2175 goto out;
2176 }
2177
2178 bm = (struct spaceBitmapDesc *)bh->b_data;
2179 bytes = le32_to_cpu(bm->numOfBytes);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002180 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2181 ptr = (uint8_t *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002183 while (bytes > 0) {
Marcin Slusarz01b954a2008-02-02 22:37:07 +01002184 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2185 accum += bitmap_weight((const unsigned long *)(ptr + index),
2186 cur_bytes * 8);
2187 bytes -= cur_bytes;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002188 if (bytes) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002189 brelse(bh);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002190 newblock = udf_get_lb_pblock(sb, &loc, ++block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002191 bh = udf_tread(sb, newblock);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002192 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002193 udf_debug("read failed\n");
2194 goto out;
2195 }
2196 index = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002197 ptr = (uint8_t *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198 }
2199 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07002200 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002201
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002202out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002203 unlock_kernel();
2204
2205 return accum;
2206}
2207
Marcin Slusarz4b111112008-02-08 04:20:36 -08002208static unsigned int udf_count_free_table(struct super_block *sb,
2209 struct inode *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002210{
2211 unsigned int accum = 0;
Jan Karaff116fc2007-05-08 00:35:14 -07002212 uint32_t elen;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002213 struct kernel_lb_addr eloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002214 int8_t etype;
Jan Karaff116fc2007-05-08 00:35:14 -07002215 struct extent_position epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002216
2217 lock_kernel();
2218
Marcin Slusarzc0b34432008-02-08 04:20:42 -08002219 epos.block = UDF_I(table)->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -07002220 epos.offset = sizeof(struct unallocSpaceEntry);
2221 epos.bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002222
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002223 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224 accum += (elen >> table->i_sb->s_blocksize_bits);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002225
Jan Kara3bf25cb2007-05-08 00:35:16 -07002226 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002227
2228 unlock_kernel();
2229
2230 return accum;
2231}
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002232
2233static unsigned int udf_count_free(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234{
2235 unsigned int accum = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002236 struct udf_sb_info *sbi;
2237 struct udf_part_map *map;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002238
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002239 sbi = UDF_SB(sb);
2240 if (sbi->s_lvid_bh) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002241 struct logicalVolIntegrityDesc *lvid =
2242 (struct logicalVolIntegrityDesc *)
2243 sbi->s_lvid_bh->b_data;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002244 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002245 accum = le32_to_cpu(
2246 lvid->freeSpaceTable[sbi->s_partition]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002247 if (accum == 0xFFFFFFFF)
2248 accum = 0;
2249 }
2250 }
2251
2252 if (accum)
2253 return accum;
2254
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002255 map = &sbi->s_partmaps[sbi->s_partition];
2256 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002257 accum += udf_count_free_bitmap(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002258 map->s_uspace.s_bitmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002259 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002260 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002261 accum += udf_count_free_bitmap(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002262 map->s_fspace.s_bitmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002263 }
2264 if (accum)
2265 return accum;
2266
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002267 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002268 accum += udf_count_free_table(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002269 map->s_uspace.s_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002270 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002271 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002272 accum += udf_count_free_table(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002273 map->s_fspace.s_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002274 }
2275
2276 return accum;
2277}