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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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#include <linux/buffer_head.h>
52#include <linux/vfs.h>
53#include <linux/vmalloc.h>
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -080054#include <linux/errno.h>
Miklos Szeredi6da80892008-02-08 04:21:50 -080055#include <linux/mount.h>
56#include <linux/seq_file.h>
Marcin Slusarz01b954a2008-02-02 22:37:07 +010057#include <linux/bitmap.h>
Bob Copelandf845fce2008-04-17 09:47:48 +020058#include <linux/crc-itu-t.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#include <asm/byteorder.h>
60
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#include "udf_sb.h"
62#include "udf_i.h"
63
64#include <linux/init.h>
65#include <asm/uaccess.h>
66
67#define VDS_POS_PRIMARY_VOL_DESC 0
68#define VDS_POS_UNALLOC_SPACE_DESC 1
69#define VDS_POS_LOGICAL_VOL_DESC 2
70#define VDS_POS_PARTITION_DESC 3
71#define VDS_POS_IMP_USE_VOL_DESC 4
72#define VDS_POS_VOL_DESC_PTR 5
73#define VDS_POS_TERMINATING_DESC 6
74#define VDS_POS_LENGTH 7
75
Miklos Szeredi6da80892008-02-08 04:21:50 -080076#define UDF_DEFAULT_BLOCKSIZE 2048
77
Al Viro8de52772012-02-06 12:45:27 -050078enum { UDF_MAX_LINKS = 0xffff };
79
Linus Torvalds1da177e2005-04-16 15:20:36 -070080/* These are the "meat" - everything else is stuffing */
81static int udf_fill_super(struct super_block *, void *, int);
82static void udf_put_super(struct super_block *);
Jan Kara146bca72009-03-16 18:27:37 +010083static int udf_sync_fs(struct super_block *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084static int udf_remount_fs(struct super_block *, int *, char *);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020085static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020086static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
87 struct kernel_lb_addr *);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070088static void udf_load_fileset(struct super_block *, struct buffer_head *,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020089 struct kernel_lb_addr *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090static void udf_open_lvid(struct super_block *);
91static void udf_close_lvid(struct super_block *);
92static unsigned int udf_count_free(struct super_block *);
David Howells726c3342006-06-23 02:02:58 -070093static int udf_statfs(struct dentry *, struct kstatfs *);
Al Viro34c80b12011-12-08 21:32:45 -050094static int udf_show_options(struct seq_file *, struct dentry *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
Marcin Slusarz6c79e982008-02-08 04:20:30 -080096struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
97{
Marcin Slusarz4b111112008-02-08 04:20:36 -080098 struct logicalVolIntegrityDesc *lvid =
99 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800100 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800101 __u32 offset = number_of_partitions * 2 *
102 sizeof(uint32_t)/sizeof(uint8_t);
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800103 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
104}
105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106/* UDF filesystem type */
Al Viro152a0832010-07-25 00:46:55 +0400107static struct dentry *udf_mount(struct file_system_type *fs_type,
108 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109{
Al Viro152a0832010-07-25 00:46:55 +0400110 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111}
112
113static struct file_system_type udf_fstype = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700114 .owner = THIS_MODULE,
115 .name = "udf",
Al Viro152a0832010-07-25 00:46:55 +0400116 .mount = udf_mount,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700117 .kill_sb = kill_block_super,
118 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119};
120
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700121static struct kmem_cache *udf_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
123static struct inode *udf_alloc_inode(struct super_block *sb)
124{
125 struct udf_inode_info *ei;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800126 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 if (!ei)
128 return NULL;
Dan Bastone95f87972006-08-13 23:24:18 -0700129
130 ei->i_unique = 0;
131 ei->i_lenExtents = 0;
132 ei->i_next_alloc_block = 0;
133 ei->i_next_alloc_goal = 0;
134 ei->i_strat4096 = 0;
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100135 init_rwsem(&ei->i_data_sem);
Dan Bastone95f87972006-08-13 23:24:18 -0700136
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 return &ei->vfs_inode;
138}
139
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100140static void udf_i_callback(struct rcu_head *head)
141{
142 struct inode *inode = container_of(head, struct inode, i_rcu);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100143 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
144}
145
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146static void udf_destroy_inode(struct inode *inode)
147{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100148 call_rcu(&inode->i_rcu, udf_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149}
150
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700151static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700153 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
Christoph Lametera35afb82007-05-16 22:10:57 -0700155 ei->i_ext.i_data = NULL;
156 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157}
158
159static int init_inodecache(void)
160{
161 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
162 sizeof(struct udf_inode_info),
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700163 0, (SLAB_RECLAIM_ACCOUNT |
164 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900165 init_once);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700166 if (!udf_inode_cachep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 return -ENOMEM;
168 return 0;
169}
170
171static void destroy_inodecache(void)
172{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700173 kmem_cache_destroy(udf_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174}
175
176/* Superblock operations */
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800177static const struct super_operations udf_sb_ops = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700178 .alloc_inode = udf_alloc_inode,
179 .destroy_inode = udf_destroy_inode,
180 .write_inode = udf_write_inode,
Al Viro3aac2b62010-06-07 00:43:39 -0400181 .evict_inode = udf_evict_inode,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700182 .put_super = udf_put_super,
Jan Kara146bca72009-03-16 18:27:37 +0100183 .sync_fs = udf_sync_fs,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700184 .statfs = udf_statfs,
185 .remount_fs = udf_remount_fs,
Miklos Szeredi6da80892008-02-08 04:21:50 -0800186 .show_options = udf_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187};
188
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700189struct udf_options {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 unsigned char novrs;
191 unsigned int blocksize;
192 unsigned int session;
193 unsigned int lastblock;
194 unsigned int anchor;
195 unsigned int volume;
196 unsigned short partition;
197 unsigned int fileset;
198 unsigned int rootdir;
199 unsigned int flags;
Al Virofaa17292011-07-26 03:18:29 -0400200 umode_t umask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 gid_t gid;
202 uid_t uid;
Al Virofaa17292011-07-26 03:18:29 -0400203 umode_t fmode;
204 umode_t dmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 struct nls_table *nls_map;
206};
207
208static int __init init_udf_fs(void)
209{
210 int err;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700211
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 err = init_inodecache();
213 if (err)
214 goto out1;
215 err = register_filesystem(&udf_fstype);
216 if (err)
217 goto out;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 return 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700220
221out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 destroy_inodecache();
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700223
224out1:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 return err;
226}
227
228static void __exit exit_udf_fs(void)
229{
230 unregister_filesystem(&udf_fstype);
231 destroy_inodecache();
232}
233
234module_init(init_udf_fs)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700235module_exit(exit_udf_fs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -0800237static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
238{
239 struct udf_sb_info *sbi = UDF_SB(sb);
240
241 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
242 GFP_KERNEL);
243 if (!sbi->s_partmaps) {
Joe Perches8076c362011-10-10 01:08:03 -0700244 udf_err(sb, "Unable to allocate space for %d partition maps\n",
245 count);
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -0800246 sbi->s_partitions = 0;
247 return -ENOMEM;
248 }
249
250 sbi->s_partitions = count;
251 return 0;
252}
253
Al Viro34c80b12011-12-08 21:32:45 -0500254static int udf_show_options(struct seq_file *seq, struct dentry *root)
Miklos Szeredi6da80892008-02-08 04:21:50 -0800255{
Al Viro34c80b12011-12-08 21:32:45 -0500256 struct super_block *sb = root->d_sb;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800257 struct udf_sb_info *sbi = UDF_SB(sb);
258
259 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
260 seq_puts(seq, ",nostrict");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +0100261 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
Miklos Szeredi6da80892008-02-08 04:21:50 -0800262 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
263 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
264 seq_puts(seq, ",unhide");
265 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
266 seq_puts(seq, ",undelete");
267 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
268 seq_puts(seq, ",noadinicb");
269 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
270 seq_puts(seq, ",shortad");
271 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
272 seq_puts(seq, ",uid=forget");
273 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
274 seq_puts(seq, ",uid=ignore");
275 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
276 seq_puts(seq, ",gid=forget");
277 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
278 seq_puts(seq, ",gid=ignore");
279 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
280 seq_printf(seq, ",uid=%u", sbi->s_uid);
281 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
282 seq_printf(seq, ",gid=%u", sbi->s_gid);
283 if (sbi->s_umask != 0)
Al Virofaa17292011-07-26 03:18:29 -0400284 seq_printf(seq, ",umask=%ho", sbi->s_umask);
Marcin Slusarz87bc7302008-12-02 13:40:11 +0100285 if (sbi->s_fmode != UDF_INVALID_MODE)
Al Virofaa17292011-07-26 03:18:29 -0400286 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
Marcin Slusarz87bc7302008-12-02 13:40:11 +0100287 if (sbi->s_dmode != UDF_INVALID_MODE)
Al Virofaa17292011-07-26 03:18:29 -0400288 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
Miklos Szeredi6da80892008-02-08 04:21:50 -0800289 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
290 seq_printf(seq, ",session=%u", sbi->s_session);
291 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
292 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
Jan Kara40346002009-03-19 16:21:38 +0100293 if (sbi->s_anchor != 0)
294 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
Miklos Szeredi6da80892008-02-08 04:21:50 -0800295 /*
296 * volume, partition, fileset and rootdir seem to be ignored
297 * currently
298 */
299 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
300 seq_puts(seq, ",utf8");
301 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
302 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
303
304 return 0;
305}
306
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307/*
308 * udf_parse_options
309 *
310 * PURPOSE
311 * Parse mount options.
312 *
313 * DESCRIPTION
314 * The following mount options are supported:
315 *
316 * gid= Set the default group.
317 * umask= Set the default umask.
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100318 * mode= Set the default file permissions.
319 * dmode= Set the default directory permissions.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 * uid= Set the default user.
321 * bs= Set the block size.
322 * unhide Show otherwise hidden files.
323 * undelete Show deleted files in lists.
324 * adinicb Embed data in the inode (default)
325 * noadinicb Don't embed data in the inode
326 * shortad Use short ad's
327 * longad Use long ad's (default)
328 * nostrict Unset strict conformance
329 * iocharset= Set the NLS character set
330 *
331 * The remaining are for debugging and disaster recovery:
332 *
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700333 * novrs Skip volume sequence recognition
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 *
335 * The following expect a offset from 0.
336 *
337 * session= Set the CDROM session (default= last session)
338 * anchor= Override standard anchor location. (default= 256)
339 * volume= Override the VolumeDesc location. (unused)
340 * partition= Override the PartitionDesc location. (unused)
341 * lastblock= Set the last block of the filesystem/
342 *
343 * The following expect a offset from the partition root.
344 *
345 * fileset= Override the fileset block location. (unused)
346 * rootdir= Override the root directory location. (unused)
347 * WARNING: overriding the rootdir to a non-directory may
348 * yield highly unpredictable results.
349 *
350 * PRE-CONDITIONS
351 * options Pointer to mount options string.
352 * uopts Pointer to mount options variable.
353 *
354 * POST-CONDITIONS
355 * <return> 1 Mount options parsed okay.
356 * <return> 0 Error parsing mount options.
357 *
358 * HISTORY
359 * July 1, 1997 - Andrew E. Mileski
360 * Written, tested, and released.
361 */
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700362
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363enum {
364 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
365 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
366 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
367 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
368 Opt_rootdir, Opt_utf8, Opt_iocharset,
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100369 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
370 Opt_fmode, Opt_dmode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371};
372
Steven Whitehousea447c092008-10-13 10:46:57 +0100373static const match_table_t tokens = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700374 {Opt_novrs, "novrs"},
375 {Opt_nostrict, "nostrict"},
376 {Opt_bs, "bs=%u"},
377 {Opt_unhide, "unhide"},
378 {Opt_undelete, "undelete"},
379 {Opt_noadinicb, "noadinicb"},
380 {Opt_adinicb, "adinicb"},
381 {Opt_shortad, "shortad"},
382 {Opt_longad, "longad"},
383 {Opt_uforget, "uid=forget"},
384 {Opt_uignore, "uid=ignore"},
385 {Opt_gforget, "gid=forget"},
386 {Opt_gignore, "gid=ignore"},
387 {Opt_gid, "gid=%u"},
388 {Opt_uid, "uid=%u"},
389 {Opt_umask, "umask=%o"},
390 {Opt_session, "session=%u"},
391 {Opt_lastblock, "lastblock=%u"},
392 {Opt_anchor, "anchor=%u"},
393 {Opt_volume, "volume=%u"},
394 {Opt_partition, "partition=%u"},
395 {Opt_fileset, "fileset=%u"},
396 {Opt_rootdir, "rootdir=%u"},
397 {Opt_utf8, "utf8"},
398 {Opt_iocharset, "iocharset=%s"},
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100399 {Opt_fmode, "mode=%o"},
400 {Opt_dmode, "dmode=%o"},
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700401 {Opt_err, NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402};
403
Miklos Szeredi6da80892008-02-08 04:21:50 -0800404static int udf_parse_options(char *options, struct udf_options *uopt,
405 bool remount)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406{
407 char *p;
408 int option;
409
410 uopt->novrs = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 uopt->partition = 0xFFFF;
412 uopt->session = 0xFFFFFFFF;
413 uopt->lastblock = 0;
414 uopt->anchor = 0;
415 uopt->volume = 0xFFFFFFFF;
416 uopt->rootdir = 0xFFFFFFFF;
417 uopt->fileset = 0xFFFFFFFF;
418 uopt->nls_map = NULL;
419
420 if (!options)
421 return 1;
422
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700423 while ((p = strsep(&options, ",")) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 substring_t args[MAX_OPT_ARGS];
425 int token;
426 if (!*p)
427 continue;
428
429 token = match_token(p, tokens, args);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700430 switch (token) {
431 case Opt_novrs:
432 uopt->novrs = 1;
Clemens Ladisch41368012009-03-06 09:16:49 +0100433 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700434 case Opt_bs:
435 if (match_int(&args[0], &option))
436 return 0;
437 uopt->blocksize = option;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +0100438 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700439 break;
440 case Opt_unhide:
441 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
442 break;
443 case Opt_undelete:
444 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
445 break;
446 case Opt_noadinicb:
447 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
448 break;
449 case Opt_adinicb:
450 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
451 break;
452 case Opt_shortad:
453 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
454 break;
455 case Opt_longad:
456 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
457 break;
458 case Opt_gid:
459 if (match_int(args, &option))
460 return 0;
461 uopt->gid = option;
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -0700462 uopt->flags |= (1 << UDF_FLAG_GID_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700463 break;
464 case Opt_uid:
465 if (match_int(args, &option))
466 return 0;
467 uopt->uid = option;
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -0700468 uopt->flags |= (1 << UDF_FLAG_UID_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700469 break;
470 case Opt_umask:
471 if (match_octal(args, &option))
472 return 0;
473 uopt->umask = option;
474 break;
475 case Opt_nostrict:
476 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
477 break;
478 case Opt_session:
479 if (match_int(args, &option))
480 return 0;
481 uopt->session = option;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800482 if (!remount)
483 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700484 break;
485 case Opt_lastblock:
486 if (match_int(args, &option))
487 return 0;
488 uopt->lastblock = option;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800489 if (!remount)
490 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700491 break;
492 case Opt_anchor:
493 if (match_int(args, &option))
494 return 0;
495 uopt->anchor = option;
496 break;
497 case Opt_volume:
498 if (match_int(args, &option))
499 return 0;
500 uopt->volume = option;
501 break;
502 case Opt_partition:
503 if (match_int(args, &option))
504 return 0;
505 uopt->partition = option;
506 break;
507 case Opt_fileset:
508 if (match_int(args, &option))
509 return 0;
510 uopt->fileset = option;
511 break;
512 case Opt_rootdir:
513 if (match_int(args, &option))
514 return 0;
515 uopt->rootdir = option;
516 break;
517 case Opt_utf8:
518 uopt->flags |= (1 << UDF_FLAG_UTF8);
519 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520#ifdef CONFIG_UDF_NLS
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700521 case Opt_iocharset:
522 uopt->nls_map = load_nls(args[0].from);
523 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
524 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525#endif
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700526 case Opt_uignore:
527 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
528 break;
529 case Opt_uforget:
530 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
531 break;
532 case Opt_gignore:
533 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
534 break;
535 case Opt_gforget:
536 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
537 break;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100538 case Opt_fmode:
539 if (match_octal(args, &option))
540 return 0;
541 uopt->fmode = option & 0777;
542 break;
543 case Opt_dmode:
544 if (match_octal(args, &option))
545 return 0;
546 uopt->dmode = option & 0777;
547 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700548 default:
Joe Perches78ace702011-10-10 01:08:05 -0700549 pr_err("bad mount option \"%s\" 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);
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400560 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800562 uopt.flags = sbi->s_flags;
563 uopt.uid = sbi->s_uid;
564 uopt.gid = sbi->s_gid;
565 uopt.umask = sbi->s_umask;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100566 uopt.fmode = sbi->s_fmode;
567 uopt.dmode = sbi->s_dmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
Miklos Szeredi6da80892008-02-08 04:21:50 -0800569 if (!udf_parse_options(options, &uopt, true))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 return -EINVAL;
571
Jan Karac03cad22010-10-20 22:17:28 +0200572 write_lock(&sbi->s_cred_lock);
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800573 sbi->s_flags = uopt.flags;
574 sbi->s_uid = uopt.uid;
575 sbi->s_gid = uopt.gid;
576 sbi->s_umask = uopt.umask;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100577 sbi->s_fmode = uopt.fmode;
578 sbi->s_dmode = uopt.dmode;
Jan Karac03cad22010-10-20 22:17:28 +0200579 write_unlock(&sbi->s_cred_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800581 if (sbi->s_lvid_bh) {
582 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 if (write_rev > UDF_MAX_WRITE_VERSION)
584 *flags |= MS_RDONLY;
585 }
586
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400587 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
588 goto out_unlock;
589
Jan Kara36350462010-05-19 16:28:56 +0200590 if (*flags & MS_RDONLY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 udf_close_lvid(sb);
Jan Kara36350462010-05-19 16:28:56 +0200592 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 udf_open_lvid(sb);
594
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400595out_unlock:
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400596 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597}
598
Jan Kara40346002009-03-19 16:21:38 +0100599/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
600/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
601static loff_t udf_check_vsd(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602{
603 struct volStructDesc *vsd = NULL;
Sebastian Manciuleaf4bcbbd2008-04-08 14:02:11 +0200604 loff_t sector = 32768;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 int sectorsize;
606 struct buffer_head *bh = NULL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700607 int nsr02 = 0;
608 int nsr03 = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800609 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800611 sbi = UDF_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 if (sb->s_blocksize < sizeof(struct volStructDesc))
613 sectorsize = sizeof(struct volStructDesc);
614 else
615 sectorsize = sb->s_blocksize;
616
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800617 sector += (sbi->s_session << sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
619 udf_debug("Starting at sector %u (%ld byte sectors)\n",
Sebastian Manciulea706047a2008-04-14 17:13:01 +0200620 (unsigned int)(sector >> sb->s_blocksize_bits),
621 sb->s_blocksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 /* Process the sequence (if applicable) */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700623 for (; !nsr02 && !nsr03; sector += sectorsize) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 /* Read a block */
625 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
626 if (!bh)
627 break;
628
629 /* Look for ISO descriptors */
630 vsd = (struct volStructDesc *)(bh->b_data +
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800631 (sector & (sb->s_blocksize - 1)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700633 if (vsd->stdIdent[0] == 0) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700634 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 break;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800636 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
637 VSD_STD_ID_LEN)) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700638 switch (vsd->structType) {
639 case 0:
640 udf_debug("ISO9660 Boot Record found\n");
641 break;
642 case 1:
Joe Perchesa983f362011-10-10 01:08:07 -0700643 udf_debug("ISO9660 Primary Volume Descriptor found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700644 break;
645 case 2:
Joe Perchesa983f362011-10-10 01:08:07 -0700646 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700647 break;
648 case 3:
Joe Perchesa983f362011-10-10 01:08:07 -0700649 udf_debug("ISO9660 Volume Partition Descriptor found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700650 break;
651 case 255:
Joe Perchesa983f362011-10-10 01:08:07 -0700652 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700653 break;
654 default:
655 udf_debug("ISO9660 VRS (%u) found\n",
656 vsd->structType);
657 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 }
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800659 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
660 VSD_STD_ID_LEN))
661 ; /* nothing */
662 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
663 VSD_STD_ID_LEN)) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700664 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 break;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800666 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
667 VSD_STD_ID_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 nsr02 = sector;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800669 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
670 VSD_STD_ID_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 nsr03 = sector;
Jan Kara3bf25cb2007-05-08 00:35:16 -0700672 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 }
674
675 if (nsr03)
676 return nsr03;
677 else if (nsr02)
678 return nsr02;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800679 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 return -1;
681 else
682 return 0;
683}
684
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800685static int udf_find_fileset(struct super_block *sb,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200686 struct kernel_lb_addr *fileset,
687 struct kernel_lb_addr *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688{
689 struct buffer_head *bh = NULL;
690 long lastblock;
691 uint16_t ident;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800692 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693
694 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700695 fileset->partitionReferenceNum != 0xFFFF) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200696 bh = udf_read_ptagged(sb, fileset, 0, &ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700698 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 return 1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700700 } else if (ident != TAG_IDENT_FSD) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700701 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 return 1;
703 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700704
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 }
706
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800707 sbi = UDF_SB(sb);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800708 if (!bh) {
709 /* Search backwards through the partitions */
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200710 struct kernel_lb_addr newfileset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700712/* --> cvg: FIXME - is it reasonable? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 return 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700714
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800715 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700716 (newfileset.partitionReferenceNum != 0xFFFF &&
717 fileset->logicalBlockNum == 0xFFFFFFFF &&
718 fileset->partitionReferenceNum == 0xFFFF);
719 newfileset.partitionReferenceNum--) {
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800720 lastblock = sbi->s_partmaps
721 [newfileset.partitionReferenceNum]
722 .s_partition_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 newfileset.logicalBlockNum = 0;
724
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700725 do {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200726 bh = udf_read_ptagged(sb, &newfileset, 0,
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800727 &ident);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700728 if (!bh) {
729 newfileset.logicalBlockNum++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 continue;
731 }
732
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700733 switch (ident) {
734 case TAG_IDENT_SBD:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700735 {
736 struct spaceBitmapDesc *sp;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800737 sp = (struct spaceBitmapDesc *)
738 bh->b_data;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700739 newfileset.logicalBlockNum += 1 +
740 ((le32_to_cpu(sp->numOfBytes) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800741 sizeof(struct spaceBitmapDesc)
742 - 1) >> sb->s_blocksize_bits);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700743 brelse(bh);
744 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700746 case TAG_IDENT_FSD:
747 *fileset = newfileset;
748 break;
749 default:
750 newfileset.logicalBlockNum++;
751 brelse(bh);
752 bh = NULL;
753 break;
754 }
755 } while (newfileset.logicalBlockNum < lastblock &&
756 fileset->logicalBlockNum == 0xFFFFFFFF &&
757 fileset->partitionReferenceNum == 0xFFFF);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 }
759 }
760
761 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700762 fileset->partitionReferenceNum != 0xFFFF) && bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 udf_debug("Fileset at block=%d, partition=%d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700764 fileset->logicalBlockNum,
765 fileset->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800767 sbi->s_partition = fileset->partitionReferenceNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 udf_load_fileset(sb, bh, root);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700769 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 return 0;
771 }
772 return 1;
773}
774
Jan Karac0eb31e2008-04-01 16:50:35 +0200775static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776{
777 struct primaryVolDesc *pvoldesc;
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100778 struct ustr *instr, *outstr;
Jan Karac0eb31e2008-04-01 16:50:35 +0200779 struct buffer_head *bh;
780 uint16_t ident;
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100781 int ret = 1;
782
783 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
784 if (!instr)
785 return 1;
786
787 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
788 if (!outstr)
789 goto out1;
Jan Karac0eb31e2008-04-01 16:50:35 +0200790
791 bh = udf_read_tagged(sb, block, block, &ident);
792 if (!bh)
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100793 goto out2;
794
Jan Karac0eb31e2008-04-01 16:50:35 +0200795 BUG_ON(ident != TAG_IDENT_PVD);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796
797 pvoldesc = (struct primaryVolDesc *)bh->b_data;
798
Marcin Slusarz56774802008-02-10 11:25:31 +0100799 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
800 pvoldesc->recordingDateAndTime)) {
Marcin Slusarzaf15a292008-02-10 11:29:10 +0100801#ifdef UDFFS_DEBUG
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200802 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
Joe Perchesa983f362011-10-10 01:08:07 -0700803 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
Marcin Slusarzaf15a292008-02-10 11:29:10 +0100804 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
805 ts->minute, le16_to_cpu(ts->typeAndTimezone));
806#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 }
808
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100809 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
810 if (udf_CS0toUTF8(outstr, instr)) {
811 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
812 outstr->u_len > 31 ? 31 : outstr->u_len);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800813 udf_debug("volIdent[] = '%s'\n",
Joe Perchesa983f362011-10-10 01:08:07 -0700814 UDF_SB(sb)->s_volume_ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100817 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
818 if (udf_CS0toUTF8(outstr, instr))
819 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
Jan Karac0eb31e2008-04-01 16:50:35 +0200820
821 brelse(bh);
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100822 ret = 0;
823out2:
824 kfree(outstr);
825out1:
826 kfree(instr);
827 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828}
829
Namjae Jeon3080a742011-10-23 19:28:32 +0900830struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
831 u32 meta_file_loc, u32 partition_num)
832{
833 struct kernel_lb_addr addr;
834 struct inode *metadata_fe;
835
836 addr.logicalBlockNum = meta_file_loc;
837 addr.partitionReferenceNum = partition_num;
838
839 metadata_fe = udf_iget(sb, &addr);
840
841 if (metadata_fe == NULL)
842 udf_warn(sb, "metadata inode efe not found\n");
843 else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
844 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
845 iput(metadata_fe);
846 metadata_fe = NULL;
847 }
848
849 return metadata_fe;
850}
851
Jan Karabfb257a2008-04-08 20:37:21 +0200852static int udf_load_metadata_files(struct super_block *sb, int partition)
853{
854 struct udf_sb_info *sbi = UDF_SB(sb);
855 struct udf_part_map *map;
856 struct udf_meta_data *mdata;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200857 struct kernel_lb_addr addr;
Jan Karabfb257a2008-04-08 20:37:21 +0200858
859 map = &sbi->s_partmaps[partition];
860 mdata = &map->s_type_specific.s_metadata;
861
862 /* metadata address */
Jan Karabfb257a2008-04-08 20:37:21 +0200863 udf_debug("Metadata file location: block = %d part = %d\n",
Namjae Jeon3080a742011-10-23 19:28:32 +0900864 mdata->s_meta_file_loc, map->s_partition_num);
Jan Karabfb257a2008-04-08 20:37:21 +0200865
Namjae Jeon3080a742011-10-23 19:28:32 +0900866 mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb,
867 mdata->s_meta_file_loc, map->s_partition_num);
Jan Karabfb257a2008-04-08 20:37:21 +0200868
869 if (mdata->s_metadata_fe == NULL) {
Namjae Jeon3080a742011-10-23 19:28:32 +0900870 /* mirror file entry */
871 udf_debug("Mirror metadata file location: block = %d part = %d\n",
872 mdata->s_mirror_file_loc, map->s_partition_num);
Jan Karabfb257a2008-04-08 20:37:21 +0200873
Namjae Jeon3080a742011-10-23 19:28:32 +0900874 mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
875 mdata->s_mirror_file_loc, map->s_partition_num);
Jan Karabfb257a2008-04-08 20:37:21 +0200876
Namjae Jeon3080a742011-10-23 19:28:32 +0900877 if (mdata->s_mirror_fe == NULL) {
878 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
Jan Karabfb257a2008-04-08 20:37:21 +0200879 goto error_exit;
Namjae Jeon3080a742011-10-23 19:28:32 +0900880 }
Jan Karabfb257a2008-04-08 20:37:21 +0200881 }
882
883 /*
884 * bitmap file entry
885 * Note:
886 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
887 */
888 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
889 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
890 addr.partitionReferenceNum = map->s_partition_num;
891
892 udf_debug("Bitmap file location: block = %d part = %d\n",
Joe Perchesa983f362011-10-10 01:08:07 -0700893 addr.logicalBlockNum, addr.partitionReferenceNum);
Jan Karabfb257a2008-04-08 20:37:21 +0200894
Pekka Enberg97e961f2008-10-15 12:29:03 +0200895 mdata->s_bitmap_fe = udf_iget(sb, &addr);
Jan Karabfb257a2008-04-08 20:37:21 +0200896
897 if (mdata->s_bitmap_fe == NULL) {
898 if (sb->s_flags & MS_RDONLY)
Joe Perchesa40ecd72011-10-10 01:08:04 -0700899 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
Jan Karabfb257a2008-04-08 20:37:21 +0200900 else {
Joe Perches8076c362011-10-10 01:08:03 -0700901 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
Jan Karabfb257a2008-04-08 20:37:21 +0200902 goto error_exit;
903 }
904 }
905 }
906
907 udf_debug("udf_load_metadata_files Ok\n");
908
909 return 0;
910
911error_exit:
912 return 1;
913}
914
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700915static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200916 struct kernel_lb_addr *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917{
918 struct fileSetDesc *fset;
919
920 fset = (struct fileSetDesc *)bh->b_data;
921
922 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
923
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800924 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700926 udf_debug("Rootdir at block=%d, partition=%d\n",
927 root->logicalBlockNum, root->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928}
929
Marcin Slusarz883cb9d2008-02-08 04:20:34 -0800930int udf_compute_nr_groups(struct super_block *sb, u32 partition)
931{
932 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
Julia Lawall8dee00b2008-02-14 16:15:45 +0100933 return DIV_ROUND_UP(map->s_partition_len +
934 (sizeof(struct spaceBitmapDesc) << 3),
935 sb->s_blocksize * 8);
Marcin Slusarz883cb9d2008-02-08 04:20:34 -0800936}
937
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800938static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
939{
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800940 struct udf_bitmap *bitmap;
941 int nr_groups;
942 int size;
943
Marcin Slusarz883cb9d2008-02-08 04:20:34 -0800944 nr_groups = udf_compute_nr_groups(sb, index);
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800945 size = sizeof(struct udf_bitmap) +
946 (sizeof(struct buffer_head *) * nr_groups);
947
948 if (size <= PAGE_SIZE)
Joe Perchesed2ae6f2010-11-04 20:08:04 -0700949 bitmap = kzalloc(size, GFP_KERNEL);
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800950 else
Joe Perchesed2ae6f2010-11-04 20:08:04 -0700951 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800952
Joe Perches75b09e02012-01-31 14:42:10 -0800953 if (bitmap == NULL)
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800954 return NULL;
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800955
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800956 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
957 bitmap->s_nr_groups = nr_groups;
958 return bitmap;
959}
960
Jan Kara3fb38df2008-04-02 12:26:36 +0200961static int udf_fill_partdesc_info(struct super_block *sb,
962 struct partitionDesc *p, int p_index)
963{
964 struct udf_part_map *map;
965 struct udf_sb_info *sbi = UDF_SB(sb);
966 struct partitionHeaderDesc *phd;
967
968 map = &sbi->s_partmaps[p_index];
969
970 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
971 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
972
973 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
974 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
975 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
976 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
977 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
978 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
979 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
980 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
981
Joe Perchesa983f362011-10-10 01:08:07 -0700982 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
983 p_index, map->s_partition_type,
984 map->s_partition_root, map->s_partition_len);
Jan Kara3fb38df2008-04-02 12:26:36 +0200985
986 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
987 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
988 return 0;
989
990 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
991 if (phd->unallocSpaceTable.extLength) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200992 struct kernel_lb_addr loc = {
Jan Kara3fb38df2008-04-02 12:26:36 +0200993 .logicalBlockNum = le32_to_cpu(
994 phd->unallocSpaceTable.extPosition),
995 .partitionReferenceNum = p_index,
996 };
997
Pekka Enberg97e961f2008-10-15 12:29:03 +0200998 map->s_uspace.s_table = udf_iget(sb, &loc);
Jan Kara3fb38df2008-04-02 12:26:36 +0200999 if (!map->s_uspace.s_table) {
1000 udf_debug("cannot load unallocSpaceTable (part %d)\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001001 p_index);
Jan Kara3fb38df2008-04-02 12:26:36 +02001002 return 1;
1003 }
1004 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1005 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001006 p_index, map->s_uspace.s_table->i_ino);
Jan Kara3fb38df2008-04-02 12:26:36 +02001007 }
1008
1009 if (phd->unallocSpaceBitmap.extLength) {
1010 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1011 if (!bitmap)
1012 return 1;
1013 map->s_uspace.s_bitmap = bitmap;
1014 bitmap->s_extLength = le32_to_cpu(
1015 phd->unallocSpaceBitmap.extLength);
1016 bitmap->s_extPosition = le32_to_cpu(
1017 phd->unallocSpaceBitmap.extPosition);
1018 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
Joe Perchesa983f362011-10-10 01:08:07 -07001019 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1020 p_index, bitmap->s_extPosition);
Jan Kara3fb38df2008-04-02 12:26:36 +02001021 }
1022
1023 if (phd->partitionIntegrityTable.extLength)
1024 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1025
1026 if (phd->freedSpaceTable.extLength) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001027 struct kernel_lb_addr loc = {
Jan Kara3fb38df2008-04-02 12:26:36 +02001028 .logicalBlockNum = le32_to_cpu(
1029 phd->freedSpaceTable.extPosition),
1030 .partitionReferenceNum = p_index,
1031 };
1032
Pekka Enberg97e961f2008-10-15 12:29:03 +02001033 map->s_fspace.s_table = udf_iget(sb, &loc);
Jan Kara3fb38df2008-04-02 12:26:36 +02001034 if (!map->s_fspace.s_table) {
1035 udf_debug("cannot load freedSpaceTable (part %d)\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001036 p_index);
Jan Kara3fb38df2008-04-02 12:26:36 +02001037 return 1;
1038 }
1039
1040 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1041 udf_debug("freedSpaceTable (part %d) @ %ld\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001042 p_index, map->s_fspace.s_table->i_ino);
Jan Kara3fb38df2008-04-02 12:26:36 +02001043 }
1044
1045 if (phd->freedSpaceBitmap.extLength) {
1046 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1047 if (!bitmap)
1048 return 1;
1049 map->s_fspace.s_bitmap = bitmap;
1050 bitmap->s_extLength = le32_to_cpu(
1051 phd->freedSpaceBitmap.extLength);
1052 bitmap->s_extPosition = le32_to_cpu(
1053 phd->freedSpaceBitmap.extPosition);
1054 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
Joe Perchesa983f362011-10-10 01:08:07 -07001055 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1056 p_index, bitmap->s_extPosition);
Jan Kara3fb38df2008-04-02 12:26:36 +02001057 }
1058 return 0;
1059}
1060
Jan Karae971b0b2009-11-30 19:47:55 +01001061static void udf_find_vat_block(struct super_block *sb, int p_index,
1062 int type1_index, sector_t start_block)
1063{
1064 struct udf_sb_info *sbi = UDF_SB(sb);
1065 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1066 sector_t vat_block;
1067 struct kernel_lb_addr ino;
1068
1069 /*
1070 * VAT file entry is in the last recorded block. Some broken disks have
1071 * it a few blocks before so try a bit harder...
1072 */
1073 ino.partitionReferenceNum = type1_index;
1074 for (vat_block = start_block;
1075 vat_block >= map->s_partition_root &&
1076 vat_block >= start_block - 3 &&
1077 !sbi->s_vat_inode; vat_block--) {
1078 ino.logicalBlockNum = vat_block - map->s_partition_root;
1079 sbi->s_vat_inode = udf_iget(sb, &ino);
1080 }
1081}
1082
Jan Kara38b74a52008-04-02 16:01:35 +02001083static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1084{
1085 struct udf_sb_info *sbi = UDF_SB(sb);
1086 struct udf_part_map *map = &sbi->s_partmaps[p_index];
Jan Karafa5e0812008-04-08 02:08:53 +02001087 struct buffer_head *bh = NULL;
1088 struct udf_inode_info *vati;
1089 uint32_t pos;
1090 struct virtualAllocationTable20 *vat20;
Jan Kara4bf17af2009-07-14 19:30:23 +02001091 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
Jan Kara38b74a52008-04-02 16:01:35 +02001092
Jan Karae971b0b2009-11-30 19:47:55 +01001093 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
Jan Kara4bf17af2009-07-14 19:30:23 +02001094 if (!sbi->s_vat_inode &&
1095 sbi->s_last_block != blocks - 1) {
Joe Perches78ace702011-10-10 01:08:05 -07001096 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1097 (unsigned long)sbi->s_last_block,
1098 (unsigned long)blocks - 1);
Jan Karae971b0b2009-11-30 19:47:55 +01001099 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
Jan Kara4bf17af2009-07-14 19:30:23 +02001100 }
Jan Kara38b74a52008-04-02 16:01:35 +02001101 if (!sbi->s_vat_inode)
1102 return 1;
1103
1104 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
Sebastian Manciulea47c93582008-04-14 17:06:36 +02001105 map->s_type_specific.s_virtual.s_start_offset = 0;
Jan Kara38b74a52008-04-02 16:01:35 +02001106 map->s_type_specific.s_virtual.s_num_entries =
1107 (sbi->s_vat_inode->i_size - 36) >> 2;
1108 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
Jan Karafa5e0812008-04-08 02:08:53 +02001109 vati = UDF_I(sbi->s_vat_inode);
1110 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1111 pos = udf_block_map(sbi->s_vat_inode, 0);
1112 bh = sb_bread(sb, pos);
1113 if (!bh)
1114 return 1;
1115 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1116 } else {
1117 vat20 = (struct virtualAllocationTable20 *)
1118 vati->i_ext.i_data;
1119 }
Jan Kara38b74a52008-04-02 16:01:35 +02001120
Jan Kara38b74a52008-04-02 16:01:35 +02001121 map->s_type_specific.s_virtual.s_start_offset =
Sebastian Manciulea47c93582008-04-14 17:06:36 +02001122 le16_to_cpu(vat20->lengthHeader);
Jan Kara38b74a52008-04-02 16:01:35 +02001123 map->s_type_specific.s_virtual.s_num_entries =
1124 (sbi->s_vat_inode->i_size -
1125 map->s_type_specific.s_virtual.
1126 s_start_offset) >> 2;
1127 brelse(bh);
1128 }
1129 return 0;
1130}
1131
Jan Karac0eb31e2008-04-01 16:50:35 +02001132static int udf_load_partdesc(struct super_block *sb, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133{
Jan Karac0eb31e2008-04-01 16:50:35 +02001134 struct buffer_head *bh;
Jan Karac0eb31e2008-04-01 16:50:35 +02001135 struct partitionDesc *p;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001136 struct udf_part_map *map;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001137 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Kara38b74a52008-04-02 16:01:35 +02001138 int i, type1_idx;
Jan Karac0eb31e2008-04-01 16:50:35 +02001139 uint16_t partitionNumber;
1140 uint16_t ident;
1141 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142
Jan Karac0eb31e2008-04-01 16:50:35 +02001143 bh = udf_read_tagged(sb, block, block, &ident);
1144 if (!bh)
1145 return 1;
1146 if (ident != TAG_IDENT_PD)
1147 goto out_bh;
1148
1149 p = (struct partitionDesc *)bh->b_data;
1150 partitionNumber = le16_to_cpu(p->partitionNumber);
Jan Kara38b74a52008-04-02 16:01:35 +02001151
Jan Karabfb257a2008-04-08 20:37:21 +02001152 /* First scan for TYPE1, SPARABLE and METADATA partitions */
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001153 for (i = 0; i < sbi->s_partitions; i++) {
1154 map = &sbi->s_partmaps[i];
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001155 udf_debug("Searching map: (%d == %d)\n",
Marcin Slusarz165923f2008-02-10 11:33:08 +01001156 map->s_partition_num, partitionNumber);
Jan Kara38b74a52008-04-02 16:01:35 +02001157 if (map->s_partition_num == partitionNumber &&
1158 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1159 map->s_partition_type == UDF_SPARABLE_MAP15))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 break;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001161 }
1162
Jan Kara38b74a52008-04-02 16:01:35 +02001163 if (i >= sbi->s_partitions) {
Marcin Slusarz165923f2008-02-10 11:33:08 +01001164 udf_debug("Partition (%d) not found in partition map\n",
1165 partitionNumber);
Jan Karac0eb31e2008-04-01 16:50:35 +02001166 goto out_bh;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001167 }
1168
Jan Kara3fb38df2008-04-02 12:26:36 +02001169 ret = udf_fill_partdesc_info(sb, p, i);
Jan Kara38b74a52008-04-02 16:01:35 +02001170
1171 /*
Jan Karabfb257a2008-04-08 20:37:21 +02001172 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1173 * PHYSICAL partitions are already set up
Jan Kara38b74a52008-04-02 16:01:35 +02001174 */
1175 type1_idx = i;
1176 for (i = 0; i < sbi->s_partitions; i++) {
1177 map = &sbi->s_partmaps[i];
1178
1179 if (map->s_partition_num == partitionNumber &&
1180 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
Jan Karabfb257a2008-04-08 20:37:21 +02001181 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1182 map->s_partition_type == UDF_METADATA_MAP25))
Jan Kara38b74a52008-04-02 16:01:35 +02001183 break;
1184 }
1185
1186 if (i >= sbi->s_partitions)
1187 goto out_bh;
1188
1189 ret = udf_fill_partdesc_info(sb, p, i);
1190 if (ret)
1191 goto out_bh;
1192
Jan Karabfb257a2008-04-08 20:37:21 +02001193 if (map->s_partition_type == UDF_METADATA_MAP25) {
1194 ret = udf_load_metadata_files(sb, i);
1195 if (ret) {
Joe Perches78ace702011-10-10 01:08:05 -07001196 udf_err(sb, "error loading MetaData partition map %d\n",
1197 i);
Jan Karabfb257a2008-04-08 20:37:21 +02001198 goto out_bh;
1199 }
1200 } else {
1201 ret = udf_load_vat(sb, i, type1_idx);
1202 if (ret)
1203 goto out_bh;
1204 /*
1205 * Mark filesystem read-only if we have a partition with
1206 * virtual map since we don't handle writing to it (we
1207 * overwrite blocks instead of relocating them).
1208 */
1209 sb->s_flags |= MS_RDONLY;
Joe Perches78ace702011-10-10 01:08:05 -07001210 pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n");
Jan Karabfb257a2008-04-08 20:37:21 +02001211 }
Jan Karac0eb31e2008-04-01 16:50:35 +02001212out_bh:
Jan Kara2e0838f2008-04-01 18:08:51 +02001213 /* In case loading failed, we handle cleanup in udf_fill_super */
Jan Karac0eb31e2008-04-01 16:50:35 +02001214 brelse(bh);
1215 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216}
1217
Jan Karac0eb31e2008-04-01 16:50:35 +02001218static int udf_load_logicalvol(struct super_block *sb, sector_t block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001219 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220{
1221 struct logicalVolDesc *lvd;
1222 int i, j, offset;
1223 uint8_t type;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001224 struct udf_sb_info *sbi = UDF_SB(sb);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001225 struct genericPartitionMap *gpm;
Jan Karac0eb31e2008-04-01 16:50:35 +02001226 uint16_t ident;
1227 struct buffer_head *bh;
1228 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229
Jan Karac0eb31e2008-04-01 16:50:35 +02001230 bh = udf_read_tagged(sb, block, block, &ident);
1231 if (!bh)
1232 return 1;
1233 BUG_ON(ident != TAG_IDENT_LVD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 lvd = (struct logicalVolDesc *)bh->b_data;
1235
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -08001236 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
Jan Karac0eb31e2008-04-01 16:50:35 +02001237 if (i != 0) {
1238 ret = i;
1239 goto out_bh;
1240 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001242 for (i = 0, offset = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001243 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001244 i++, offset += gpm->partitionMapLength) {
1245 struct udf_part_map *map = &sbi->s_partmaps[i];
1246 gpm = (struct genericPartitionMap *)
1247 &(lvd->partitionMaps[offset]);
1248 type = gpm->partitionMapType;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001249 if (type == 1) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001250 struct genericPartitionMap1 *gpm1 =
1251 (struct genericPartitionMap1 *)gpm;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001252 map->s_partition_type = UDF_TYPE1_MAP15;
1253 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1254 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1255 map->s_partition_func = NULL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001256 } else if (type == 2) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001257 struct udfPartitionMap2 *upm2 =
1258 (struct udfPartitionMap2 *)gpm;
1259 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1260 strlen(UDF_ID_VIRTUAL))) {
1261 u16 suf =
1262 le16_to_cpu(((__le16 *)upm2->partIdent.
1263 identSuffix)[0]);
Jan Karac82a1272008-04-08 01:16:32 +02001264 if (suf < 0x0200) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001265 map->s_partition_type =
1266 UDF_VIRTUAL_MAP15;
1267 map->s_partition_func =
1268 udf_get_pblock_virt15;
Jan Karac82a1272008-04-08 01:16:32 +02001269 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001270 map->s_partition_type =
1271 UDF_VIRTUAL_MAP20;
1272 map->s_partition_func =
1273 udf_get_pblock_virt20;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 }
Marcin Slusarz4b111112008-02-08 04:20:36 -08001275 } else if (!strncmp(upm2->partIdent.ident,
1276 UDF_ID_SPARABLE,
1277 strlen(UDF_ID_SPARABLE))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 uint32_t loc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279 struct sparingTable *st;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001280 struct sparablePartitionMap *spm =
1281 (struct sparablePartitionMap *)gpm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001283 map->s_partition_type = UDF_SPARABLE_MAP15;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001284 map->s_type_specific.s_sparing.s_packet_len =
1285 le16_to_cpu(spm->packetLength);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001286 for (j = 0; j < spm->numSparingTables; j++) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001287 struct buffer_head *bh2;
1288
1289 loc = le32_to_cpu(
1290 spm->locSparingTable[j]);
1291 bh2 = udf_read_tagged(sb, loc, loc,
1292 &ident);
1293 map->s_type_specific.s_sparing.
1294 s_spar_map[j] = bh2;
1295
Marcin Slusarz165923f2008-02-10 11:33:08 +01001296 if (bh2 == NULL)
1297 continue;
1298
1299 st = (struct sparingTable *)bh2->b_data;
1300 if (ident != 0 || strncmp(
1301 st->sparingIdent.ident,
1302 UDF_ID_SPARING,
1303 strlen(UDF_ID_SPARING))) {
1304 brelse(bh2);
1305 map->s_type_specific.s_sparing.
1306 s_spar_map[j] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 }
1308 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001309 map->s_partition_func = udf_get_pblock_spar15;
Jan Karabfb257a2008-04-08 20:37:21 +02001310 } else if (!strncmp(upm2->partIdent.ident,
1311 UDF_ID_METADATA,
1312 strlen(UDF_ID_METADATA))) {
1313 struct udf_meta_data *mdata =
1314 &map->s_type_specific.s_metadata;
1315 struct metadataPartitionMap *mdm =
1316 (struct metadataPartitionMap *)
1317 &(lvd->partitionMaps[offset]);
Joe Perchesa983f362011-10-10 01:08:07 -07001318 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1319 i, type, UDF_ID_METADATA);
Jan Karabfb257a2008-04-08 20:37:21 +02001320
1321 map->s_partition_type = UDF_METADATA_MAP25;
1322 map->s_partition_func = udf_get_pblock_meta25;
1323
1324 mdata->s_meta_file_loc =
1325 le32_to_cpu(mdm->metadataFileLoc);
1326 mdata->s_mirror_file_loc =
1327 le32_to_cpu(mdm->metadataMirrorFileLoc);
1328 mdata->s_bitmap_file_loc =
1329 le32_to_cpu(mdm->metadataBitmapFileLoc);
1330 mdata->s_alloc_unit_size =
1331 le32_to_cpu(mdm->allocUnitSize);
1332 mdata->s_align_unit_size =
1333 le16_to_cpu(mdm->alignUnitSize);
Jan Karaed47a7d2011-10-24 16:47:48 +02001334 if (mdm->flags & 0x01)
1335 mdata->s_flags |= MF_DUPLICATE_MD;
Jan Karabfb257a2008-04-08 20:37:21 +02001336
1337 udf_debug("Metadata Ident suffix=0x%x\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001338 le16_to_cpu(*(__le16 *)
1339 mdm->partIdent.identSuffix));
Jan Karabfb257a2008-04-08 20:37:21 +02001340 udf_debug("Metadata part num=%d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001341 le16_to_cpu(mdm->partitionNum));
Jan Karabfb257a2008-04-08 20:37:21 +02001342 udf_debug("Metadata part alloc unit size=%d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001343 le32_to_cpu(mdm->allocUnitSize));
Jan Karabfb257a2008-04-08 20:37:21 +02001344 udf_debug("Metadata file loc=%d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001345 le32_to_cpu(mdm->metadataFileLoc));
Jan Karabfb257a2008-04-08 20:37:21 +02001346 udf_debug("Mirror file loc=%d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001347 le32_to_cpu(mdm->metadataMirrorFileLoc));
Jan Karabfb257a2008-04-08 20:37:21 +02001348 udf_debug("Bitmap file loc=%d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001349 le32_to_cpu(mdm->metadataBitmapFileLoc));
Jan Karaed47a7d2011-10-24 16:47:48 +02001350 udf_debug("Flags: %d %d\n",
1351 mdata->s_flags, mdm->flags);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001352 } else {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001353 udf_debug("Unknown ident: %s\n",
1354 upm2->partIdent.ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355 continue;
1356 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001357 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1358 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359 }
1360 udf_debug("Partition (%d:%d) type %d on volume %d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001361 i, map->s_partition_num, type, map->s_volumeseqnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 }
1363
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001364 if (fileset) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001365 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366
1367 *fileset = lelb_to_cpu(la->extLocation);
Joe Perchesa983f362011-10-10 01:08:07 -07001368 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1369 fileset->logicalBlockNum,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001370 fileset->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 }
1372 if (lvd->integritySeqExt.extLength)
1373 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001374
Jan Karac0eb31e2008-04-01 16:50:35 +02001375out_bh:
1376 brelse(bh);
1377 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378}
1379
1380/*
1381 * udf_load_logicalvolint
1382 *
1383 */
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001384static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385{
1386 struct buffer_head *bh = NULL;
1387 uint16_t ident;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001388 struct udf_sb_info *sbi = UDF_SB(sb);
1389 struct logicalVolIntegrityDesc *lvid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390
1391 while (loc.extLength > 0 &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001392 (bh = udf_read_tagged(sb, loc.extLocation,
1393 loc.extLocation, &ident)) &&
1394 ident == TAG_IDENT_LVID) {
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001395 sbi->s_lvid_bh = bh;
1396 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001397
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001398 if (lvid->nextIntegrityExt.extLength)
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001399 udf_load_logicalvolint(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001400 leea_to_cpu(lvid->nextIntegrityExt));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001401
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001402 if (sbi->s_lvid_bh != bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001403 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404 loc.extLength -= sb->s_blocksize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001405 loc.extLocation++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001407 if (sbi->s_lvid_bh != bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001408 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409}
1410
1411/*
1412 * udf_process_sequence
1413 *
1414 * PURPOSE
1415 * Process a main/reserve volume descriptor sequence.
1416 *
1417 * PRE-CONDITIONS
1418 * sb Pointer to _locked_ superblock.
1419 * block First block of first extent of the sequence.
1420 * lastblock Lastblock of first extent of the sequence.
1421 *
1422 * HISTORY
1423 * July 1, 1997 - Andrew E. Mileski
1424 * Written, tested, and released.
1425 */
Jan Kara200a3592008-03-04 13:03:09 +01001426static noinline int udf_process_sequence(struct super_block *sb, long block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001427 long lastblock, struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428{
1429 struct buffer_head *bh = NULL;
1430 struct udf_vds_record vds[VDS_POS_LENGTH];
Marcin Slusarz4b111112008-02-08 04:20:36 -08001431 struct udf_vds_record *curr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432 struct generic_desc *gd;
1433 struct volDescPtr *vdp;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001434 int done = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435 uint32_t vdsn;
1436 uint16_t ident;
1437 long next_s = 0, next_e = 0;
1438
1439 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1440
Jan Karac0eb31e2008-04-01 16:50:35 +02001441 /*
1442 * Read the main descriptor sequence and find which descriptors
1443 * are in it.
1444 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001445 for (; (!done && block <= lastblock); block++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446
1447 bh = udf_read_tagged(sb, block, block, &ident);
Jan Karac0eb31e2008-04-01 16:50:35 +02001448 if (!bh) {
Joe Perches78ace702011-10-10 01:08:05 -07001449 udf_err(sb,
1450 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1451 (unsigned long long)block);
Jan Karac0eb31e2008-04-01 16:50:35 +02001452 return 1;
1453 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454
1455 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1456 gd = (struct generic_desc *)bh->b_data;
1457 vdsn = le32_to_cpu(gd->volDescSeqNum);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001458 switch (ident) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001459 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001460 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1461 if (vdsn >= curr->volDescSeqNum) {
1462 curr->volDescSeqNum = vdsn;
1463 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001464 }
1465 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001466 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001467 curr = &vds[VDS_POS_VOL_DESC_PTR];
1468 if (vdsn >= curr->volDescSeqNum) {
1469 curr->volDescSeqNum = vdsn;
1470 curr->block = block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001472 vdp = (struct volDescPtr *)bh->b_data;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001473 next_s = le32_to_cpu(
1474 vdp->nextVolDescSeqExt.extLocation);
1475 next_e = le32_to_cpu(
1476 vdp->nextVolDescSeqExt.extLength);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001477 next_e = next_e >> sb->s_blocksize_bits;
1478 next_e += next_s;
1479 }
1480 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001481 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001482 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1483 if (vdsn >= curr->volDescSeqNum) {
1484 curr->volDescSeqNum = vdsn;
1485 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001486 }
1487 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001488 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001489 curr = &vds[VDS_POS_PARTITION_DESC];
1490 if (!curr->block)
1491 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001492 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001493 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001494 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1495 if (vdsn >= curr->volDescSeqNum) {
1496 curr->volDescSeqNum = vdsn;
1497 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001498 }
1499 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001500 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001501 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1502 if (vdsn >= curr->volDescSeqNum) {
1503 curr->volDescSeqNum = vdsn;
1504 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001505 }
1506 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001507 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001508 vds[VDS_POS_TERMINATING_DESC].block = block;
1509 if (next_e) {
1510 block = next_s;
1511 lastblock = next_e;
1512 next_s = next_e = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001513 } else
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001514 done = 1;
1515 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07001517 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518 }
Jan Karac0eb31e2008-04-01 16:50:35 +02001519 /*
1520 * Now read interesting descriptors again and process them
1521 * in a suitable order
1522 */
1523 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
Joe Perches78ace702011-10-10 01:08:05 -07001524 udf_err(sb, "Primary Volume Descriptor not found!\n");
Jan Karac0eb31e2008-04-01 16:50:35 +02001525 return 1;
1526 }
1527 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1528 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529
Jan Karac0eb31e2008-04-01 16:50:35 +02001530 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1531 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1532 return 1;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001533
Jan Karac0eb31e2008-04-01 16:50:35 +02001534 if (vds[VDS_POS_PARTITION_DESC].block) {
1535 /*
1536 * We rescan the whole descriptor sequence to find
1537 * partition descriptor blocks and process them.
1538 */
1539 for (block = vds[VDS_POS_PARTITION_DESC].block;
1540 block < vds[VDS_POS_TERMINATING_DESC].block;
1541 block++)
1542 if (udf_load_partdesc(sb, block))
Marcin Slusarz165923f2008-02-10 11:33:08 +01001543 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544 }
1545
1546 return 0;
1547}
1548
Jan Kara40346002009-03-19 16:21:38 +01001549static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1550 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551{
Jan Kara40346002009-03-19 16:21:38 +01001552 struct anchorVolDescPtr *anchor;
1553 long main_s, main_e, reserve_s, reserve_e;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554
Jan Kara40346002009-03-19 16:21:38 +01001555 anchor = (struct anchorVolDescPtr *)bh->b_data;
1556
1557 /* Locate the main sequence */
1558 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1559 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1560 main_e = main_e >> sb->s_blocksize_bits;
1561 main_e += main_s;
1562
1563 /* Locate the reserve sequence */
1564 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1565 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1566 reserve_e = reserve_e >> sb->s_blocksize_bits;
1567 reserve_e += reserve_s;
1568
1569 /* Process the main & reserve sequences */
1570 /* responsible for finding the PartitionDesc(s) */
1571 if (!udf_process_sequence(sb, main_s, main_e, fileset))
1572 return 1;
1573 return !udf_process_sequence(sb, reserve_s, reserve_e, fileset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574}
1575
Jan Kara40346002009-03-19 16:21:38 +01001576/*
1577 * Check whether there is an anchor block in the given block and
1578 * load Volume Descriptor Sequence if so.
1579 */
1580static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1581 struct kernel_lb_addr *fileset)
1582{
1583 struct buffer_head *bh;
1584 uint16_t ident;
1585 int ret;
1586
1587 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1588 udf_fixed_to_variable(block) >=
1589 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1590 return 0;
1591
1592 bh = udf_read_tagged(sb, block, block, &ident);
1593 if (!bh)
1594 return 0;
1595 if (ident != TAG_IDENT_AVDP) {
1596 brelse(bh);
1597 return 0;
1598 }
1599 ret = udf_load_sequence(sb, bh, fileset);
1600 brelse(bh);
1601 return ret;
1602}
1603
1604/* Search for an anchor volume descriptor pointer */
1605static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
1606 struct kernel_lb_addr *fileset)
1607{
1608 sector_t last[6];
1609 int i;
1610 struct udf_sb_info *sbi = UDF_SB(sb);
1611 int last_count = 0;
1612
1613 /* First try user provided anchor */
1614 if (sbi->s_anchor) {
1615 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
1616 return lastblock;
1617 }
1618 /*
1619 * according to spec, anchor is in either:
1620 * block 256
1621 * lastblock-256
1622 * lastblock
1623 * however, if the disc isn't closed, it could be 512.
1624 */
1625 if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
1626 return lastblock;
1627 /*
1628 * The trouble is which block is the last one. Drives often misreport
1629 * this so we try various possibilities.
1630 */
1631 last[last_count++] = lastblock;
1632 if (lastblock >= 1)
1633 last[last_count++] = lastblock - 1;
1634 last[last_count++] = lastblock + 1;
1635 if (lastblock >= 2)
1636 last[last_count++] = lastblock - 2;
1637 if (lastblock >= 150)
1638 last[last_count++] = lastblock - 150;
1639 if (lastblock >= 152)
1640 last[last_count++] = lastblock - 152;
1641
1642 for (i = 0; i < last_count; i++) {
1643 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1644 sb->s_blocksize_bits)
1645 continue;
1646 if (udf_check_anchor_block(sb, last[i], fileset))
1647 return last[i];
1648 if (last[i] < 256)
1649 continue;
1650 if (udf_check_anchor_block(sb, last[i] - 256, fileset))
1651 return last[i];
1652 }
1653
1654 /* Finally try block 512 in case media is open */
1655 if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
1656 return last[0];
1657 return 0;
1658}
1659
1660/*
1661 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1662 * area specified by it. The function expects sbi->s_lastblock to be the last
1663 * block on the media.
1664 *
1665 * Return 1 if ok, 0 if not found.
1666 *
1667 */
1668static int udf_find_anchor(struct super_block *sb,
1669 struct kernel_lb_addr *fileset)
1670{
1671 sector_t lastblock;
1672 struct udf_sb_info *sbi = UDF_SB(sb);
1673
1674 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1675 if (lastblock)
1676 goto out;
1677
1678 /* No anchor found? Try VARCONV conversion of block numbers */
1679 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1680 /* Firstly, we try to not convert number of the last block */
1681 lastblock = udf_scan_anchors(sb,
1682 udf_variable_to_fixed(sbi->s_last_block),
1683 fileset);
1684 if (lastblock)
1685 goto out;
1686
1687 /* Secondly, we try with converted number of the last block */
1688 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1689 if (!lastblock) {
1690 /* VARCONV didn't help. Clear it. */
1691 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1692 return 0;
1693 }
1694out:
1695 sbi->s_last_block = lastblock;
1696 return 1;
1697}
1698
1699/*
1700 * Check Volume Structure Descriptor, find Anchor block and load Volume
1701 * Descriptor Sequence
1702 */
1703static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1704 int silent, struct kernel_lb_addr *fileset)
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001705{
1706 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Kara40346002009-03-19 16:21:38 +01001707 loff_t nsr_off;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001708
1709 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1710 if (!silent)
Joe Perches78ace702011-10-10 01:08:05 -07001711 udf_warn(sb, "Bad block size\n");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001712 return 0;
1713 }
1714 sbi->s_last_block = uopt->lastblock;
Jan Kara40346002009-03-19 16:21:38 +01001715 if (!uopt->novrs) {
1716 /* Check that it is NSR02 compliant */
1717 nsr_off = udf_check_vsd(sb);
1718 if (!nsr_off) {
1719 if (!silent)
Joe Perches78ace702011-10-10 01:08:05 -07001720 udf_warn(sb, "No VRS found\n");
Jan Kara40346002009-03-19 16:21:38 +01001721 return 0;
1722 }
1723 if (nsr_off == -1)
Joe Perchesa983f362011-10-10 01:08:07 -07001724 udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n");
Jan Kara40346002009-03-19 16:21:38 +01001725 if (!sbi->s_last_block)
1726 sbi->s_last_block = udf_get_last_block(sb);
1727 } else {
1728 udf_debug("Validity check skipped because of novrs option\n");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001729 }
Jan Kara40346002009-03-19 16:21:38 +01001730
1731 /* Look for anchor block and load Volume Descriptor Sequence */
1732 sbi->s_anchor = uopt->anchor;
1733 if (!udf_find_anchor(sb, fileset)) {
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001734 if (!silent)
Joe Perches78ace702011-10-10 01:08:05 -07001735 udf_warn(sb, "No anchor found\n");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001736 return 0;
1737 }
1738 return 1;
1739}
1740
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741static void udf_open_lvid(struct super_block *sb)
1742{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001743 struct udf_sb_info *sbi = UDF_SB(sb);
1744 struct buffer_head *bh = sbi->s_lvid_bh;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001745 struct logicalVolIntegrityDesc *lvid;
1746 struct logicalVolIntegrityDescImpUse *lvidiu;
Jan Kara146bca72009-03-16 18:27:37 +01001747
Marcin Slusarz165923f2008-02-10 11:33:08 +01001748 if (!bh)
1749 return;
Jan Kara949f4a72010-10-20 18:49:20 +02001750
1751 mutex_lock(&sbi->s_alloc_mutex);
Marcin Slusarz165923f2008-02-10 11:33:08 +01001752 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1753 lvidiu = udf_sb_lvidiu(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754
Marcin Slusarz165923f2008-02-10 11:33:08 +01001755 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1756 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1757 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1758 CURRENT_TIME);
Jan Kara146bca72009-03-16 18:27:37 +01001759 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760
Marcin Slusarz165923f2008-02-10 11:33:08 +01001761 lvid->descTag.descCRC = cpu_to_le16(
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001762 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001763 le16_to_cpu(lvid->descTag.descCRCLength)));
Marcin Slusarz165923f2008-02-10 11:33:08 +01001764
1765 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1766 mark_buffer_dirty(bh);
Jan Kara146bca72009-03-16 18:27:37 +01001767 sbi->s_lvid_dirty = 0;
Jan Kara949f4a72010-10-20 18:49:20 +02001768 mutex_unlock(&sbi->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769}
1770
1771static void udf_close_lvid(struct super_block *sb)
1772{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001773 struct udf_sb_info *sbi = UDF_SB(sb);
1774 struct buffer_head *bh = sbi->s_lvid_bh;
1775 struct logicalVolIntegrityDesc *lvid;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001776 struct logicalVolIntegrityDescImpUse *lvidiu;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001777
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001778 if (!bh)
1779 return;
1780
Jan Kara949f4a72010-10-20 18:49:20 +02001781 mutex_lock(&sbi->s_alloc_mutex);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001782 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001783 lvidiu = udf_sb_lvidiu(sbi);
1784 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1785 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1786 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1787 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1788 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1789 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1790 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1791 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1792 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1793 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794
Marcin Slusarz165923f2008-02-10 11:33:08 +01001795 lvid->descTag.descCRC = cpu_to_le16(
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001796 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001797 le16_to_cpu(lvid->descTag.descCRCLength)));
Marcin Slusarz165923f2008-02-10 11:33:08 +01001798
1799 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
Jan Kara853a0c22011-12-23 11:53:07 +01001800 /*
1801 * We set buffer uptodate unconditionally here to avoid spurious
1802 * warnings from mark_buffer_dirty() when previous EIO has marked
1803 * the buffer as !uptodate
1804 */
1805 set_buffer_uptodate(bh);
Marcin Slusarz165923f2008-02-10 11:33:08 +01001806 mark_buffer_dirty(bh);
Jan Kara146bca72009-03-16 18:27:37 +01001807 sbi->s_lvid_dirty = 0;
Jan Kara949f4a72010-10-20 18:49:20 +02001808 mutex_unlock(&sbi->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001809}
1810
Jan Karad664b6a2010-10-20 18:28:46 +02001811u64 lvid_get_unique_id(struct super_block *sb)
1812{
1813 struct buffer_head *bh;
1814 struct udf_sb_info *sbi = UDF_SB(sb);
1815 struct logicalVolIntegrityDesc *lvid;
1816 struct logicalVolHeaderDesc *lvhd;
1817 u64 uniqueID;
1818 u64 ret;
1819
1820 bh = sbi->s_lvid_bh;
1821 if (!bh)
1822 return 0;
1823
1824 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1825 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
1826
1827 mutex_lock(&sbi->s_alloc_mutex);
1828 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
1829 if (!(++uniqueID & 0xFFFFFFFF))
1830 uniqueID += 16;
1831 lvhd->uniqueID = cpu_to_le64(uniqueID);
1832 mutex_unlock(&sbi->s_alloc_mutex);
1833 mark_buffer_dirty(bh);
1834
1835 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836}
1837
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001838static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1839{
1840 int i;
1841 int nr_groups = bitmap->s_nr_groups;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001842 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1843 nr_groups);
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001844
1845 for (i = 0; i < nr_groups; i++)
1846 if (bitmap->s_block_bitmap[i])
1847 brelse(bitmap->s_block_bitmap[i]);
1848
1849 if (size <= PAGE_SIZE)
1850 kfree(bitmap);
1851 else
1852 vfree(bitmap);
1853}
1854
Jan Kara2e0838f2008-04-01 18:08:51 +02001855static void udf_free_partition(struct udf_part_map *map)
1856{
1857 int i;
Jan Karabfb257a2008-04-08 20:37:21 +02001858 struct udf_meta_data *mdata;
Jan Kara2e0838f2008-04-01 18:08:51 +02001859
1860 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1861 iput(map->s_uspace.s_table);
1862 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1863 iput(map->s_fspace.s_table);
1864 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1865 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1866 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1867 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1868 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1869 for (i = 0; i < 4; i++)
1870 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
Jan Karabfb257a2008-04-08 20:37:21 +02001871 else if (map->s_partition_type == UDF_METADATA_MAP25) {
1872 mdata = &map->s_type_specific.s_metadata;
1873 iput(mdata->s_metadata_fe);
1874 mdata->s_metadata_fe = NULL;
1875
1876 iput(mdata->s_mirror_fe);
1877 mdata->s_mirror_fe = NULL;
1878
1879 iput(mdata->s_bitmap_fe);
1880 mdata->s_bitmap_fe = NULL;
1881 }
Jan Kara2e0838f2008-04-01 18:08:51 +02001882}
1883
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884static int udf_fill_super(struct super_block *sb, void *options, int silent)
1885{
1886 int i;
Jan Kara40346002009-03-19 16:21:38 +01001887 int ret;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001888 struct inode *inode = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889 struct udf_options uopt;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001890 struct kernel_lb_addr rootdir, fileset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891 struct udf_sb_info *sbi;
1892
1893 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1894 uopt.uid = -1;
1895 uopt.gid = -1;
1896 uopt.umask = 0;
Marcin Slusarz87bc7302008-12-02 13:40:11 +01001897 uopt.fmode = UDF_INVALID_MODE;
1898 uopt.dmode = UDF_INVALID_MODE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001899
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001900 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
Alessio Igor Bogani9db9f9e2010-11-16 18:40:49 +01001901 if (!sbi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902 return -ENOMEM;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001903
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904 sb->s_fs_info = sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001905
Ingo Molnar1e7933d2006-03-23 03:00:44 -08001906 mutex_init(&sbi->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001907
Miklos Szeredi6da80892008-02-08 04:21:50 -08001908 if (!udf_parse_options((char *)options, &uopt, false))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909 goto error_out;
1910
1911 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001912 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
Joe Perches8076c362011-10-10 01:08:03 -07001913 udf_err(sb, "utf8 cannot be combined with iocharset\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914 goto error_out;
1915 }
1916#ifdef CONFIG_UDF_NLS
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001917 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918 uopt.nls_map = load_nls_default();
1919 if (!uopt.nls_map)
1920 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1921 else
1922 udf_debug("Using default NLS map\n");
1923 }
1924#endif
1925 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1926 uopt.flags |= (1 << UDF_FLAG_UTF8);
1927
1928 fileset.logicalBlockNum = 0xFFFFFFFF;
1929 fileset.partitionReferenceNum = 0xFFFF;
1930
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001931 sbi->s_flags = uopt.flags;
1932 sbi->s_uid = uopt.uid;
1933 sbi->s_gid = uopt.gid;
1934 sbi->s_umask = uopt.umask;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01001935 sbi->s_fmode = uopt.fmode;
1936 sbi->s_dmode = uopt.dmode;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001937 sbi->s_nls_map = uopt.nls_map;
Jan Karac03cad22010-10-20 22:17:28 +02001938 rwlock_init(&sbi->s_cred_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001940 if (uopt.session == 0xFFFFFFFF)
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001941 sbi->s_session = udf_get_last_session(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001942 else
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001943 sbi->s_session = uopt.session;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001945 udf_debug("Multi-session=%d\n", sbi->s_session);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947 /* Fill in the rest of the superblock */
1948 sb->s_op = &udf_sb_ops;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001949 sb->s_export_op = &udf_export_ops;
Christoph Hellwig123e9ca2010-05-19 07:16:44 -04001950
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951 sb->s_dirt = 0;
1952 sb->s_magic = UDF_SUPER_MAGIC;
1953 sb->s_time_gran = 1000;
1954
Jan Kara40346002009-03-19 16:21:38 +01001955 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
1956 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1957 } else {
Martin K. Petersene1defc42009-05-22 17:17:49 -04001958 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
Jan Kara40346002009-03-19 16:21:38 +01001959 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1960 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1961 if (!silent)
Joe Perches78ace702011-10-10 01:08:05 -07001962 pr_notice("Rescanning with blocksize %d\n",
1963 UDF_DEFAULT_BLOCKSIZE);
Jan Kara40346002009-03-19 16:21:38 +01001964 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
1965 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1966 }
1967 }
1968 if (!ret) {
Joe Perches78ace702011-10-10 01:08:05 -07001969 udf_warn(sb, "No partition found (1)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970 goto error_out;
1971 }
1972
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001973 udf_debug("Lastblock=%d\n", sbi->s_last_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001974
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001975 if (sbi->s_lvid_bh) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001976 struct logicalVolIntegrityDescImpUse *lvidiu =
1977 udf_sb_lvidiu(sbi);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001978 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1979 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001980 /* uint16_t maxUDFWriteRev =
1981 le16_to_cpu(lvidiu->maxUDFWriteRev); */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001982
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001983 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
Joe Perches78ace702011-10-10 01:08:05 -07001984 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
1985 le16_to_cpu(lvidiu->minUDFReadRev),
1986 UDF_MAX_READ_VERSION);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001987 goto error_out;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001988 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001989 sb->s_flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001990
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001991 sbi->s_udfrev = minUDFWriteRev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992
1993 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
1994 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
1995 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
1996 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
1997 }
1998
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001999 if (!sbi->s_partitions) {
Joe Perches78ace702011-10-10 01:08:05 -07002000 udf_warn(sb, "No partition found (2)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002001 goto error_out;
2002 }
2003
Marcin Slusarz4b111112008-02-08 04:20:36 -08002004 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2005 UDF_PART_FLAG_READ_ONLY) {
Joe Perches78ace702011-10-10 01:08:05 -07002006 pr_notice("Partition marked readonly; forcing readonly mount\n");
Eric Sandeen39b3f6d2006-09-29 01:59:41 -07002007 sb->s_flags |= MS_RDONLY;
Peter Osterlundc1a26e72006-10-05 21:17:50 +02002008 }
Eric Sandeen39b3f6d2006-09-29 01:59:41 -07002009
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002010 if (udf_find_fileset(sb, &fileset, &rootdir)) {
Joe Perches78ace702011-10-10 01:08:05 -07002011 udf_warn(sb, "No fileset found\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012 goto error_out;
2013 }
2014
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002015 if (!silent) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002016 struct timestamp ts;
Marcin Slusarz56774802008-02-10 11:25:31 +01002017 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
Joe Perches78ace702011-10-10 01:08:05 -07002018 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2019 sbi->s_volume_ident,
2020 le16_to_cpu(ts.year), ts.month, ts.day,
Marcin Slusarz56774802008-02-10 11:25:31 +01002021 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002022 }
2023 if (!(sb->s_flags & MS_RDONLY))
2024 udf_open_lvid(sb);
2025
2026 /* Assign the root inode */
2027 /* assign inodes by physical block number */
2028 /* perhaps it's not extensible enough, but for now ... */
Pekka Enberg97e961f2008-10-15 12:29:03 +02002029 inode = udf_iget(sb, &rootdir);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002030 if (!inode) {
Joe Perches78ace702011-10-10 01:08:05 -07002031 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002032 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033 goto error_out;
2034 }
2035
2036 /* Allocate a dentry for the root inode */
Al Viro48fde702012-01-08 22:15:13 -05002037 sb->s_root = d_make_root(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002038 if (!sb->s_root) {
Joe Perches78ace702011-10-10 01:08:05 -07002039 udf_err(sb, "Couldn't allocate root dentry\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040 goto error_out;
2041 }
Jan Kara31170b62007-05-08 00:35:21 -07002042 sb->s_maxbytes = MAX_LFS_FILESIZE;
Al Viro8de52772012-02-06 12:45:27 -05002043 sb->s_max_links = UDF_MAX_LINKS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002044 return 0;
2045
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002046error_out:
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002047 if (sbi->s_vat_inode)
2048 iput(sbi->s_vat_inode);
Jan Kara2e0838f2008-04-01 18:08:51 +02002049 if (sbi->s_partitions)
2050 for (i = 0; i < sbi->s_partitions; i++)
2051 udf_free_partition(&sbi->s_partmaps[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052#ifdef CONFIG_UDF_NLS
2053 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002054 unload_nls(sbi->s_nls_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055#endif
2056 if (!(sb->s_flags & MS_RDONLY))
2057 udf_close_lvid(sb);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002058 brelse(sbi->s_lvid_bh);
2059
2060 kfree(sbi->s_partmaps);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061 kfree(sbi);
2062 sb->s_fs_info = NULL;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002063
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064 return -EINVAL;
2065}
2066
Joe Perches8076c362011-10-10 01:08:03 -07002067void _udf_err(struct super_block *sb, const char *function,
2068 const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069{
Joe Perchesc2bff362011-10-10 01:08:06 -07002070 struct va_format vaf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002071 va_list args;
2072
Joe Perchesc2bff362011-10-10 01:08:06 -07002073 /* mark sb error */
2074 if (!(sb->s_flags & MS_RDONLY))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002075 sb->s_dirt = 1;
Joe Perchesc2bff362011-10-10 01:08:06 -07002076
Linus Torvalds1da177e2005-04-16 15:20:36 -07002077 va_start(args, fmt);
Joe Perchesc2bff362011-10-10 01:08:06 -07002078
2079 vaf.fmt = fmt;
2080 vaf.va = &args;
2081
2082 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2083
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084 va_end(args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002085}
2086
Joe Perchesa40ecd72011-10-10 01:08:04 -07002087void _udf_warn(struct super_block *sb, const char *function,
2088 const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089{
Joe Perchesc2bff362011-10-10 01:08:06 -07002090 struct va_format vaf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002091 va_list args;
2092
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002093 va_start(args, fmt);
Joe Perchesc2bff362011-10-10 01:08:06 -07002094
2095 vaf.fmt = fmt;
2096 vaf.va = &args;
2097
2098 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2099
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100 va_end(args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101}
2102
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002103static void udf_put_super(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002104{
2105 int i;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002106 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002107
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002108 sbi = UDF_SB(sb);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +02002109
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002110 if (sbi->s_vat_inode)
2111 iput(sbi->s_vat_inode);
Jan Kara2e0838f2008-04-01 18:08:51 +02002112 if (sbi->s_partitions)
2113 for (i = 0; i < sbi->s_partitions; i++)
2114 udf_free_partition(&sbi->s_partmaps[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002115#ifdef CONFIG_UDF_NLS
2116 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002117 unload_nls(sbi->s_nls_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002118#endif
2119 if (!(sb->s_flags & MS_RDONLY))
2120 udf_close_lvid(sb);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002121 brelse(sbi->s_lvid_bh);
2122 kfree(sbi->s_partmaps);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123 kfree(sb->s_fs_info);
2124 sb->s_fs_info = NULL;
2125}
2126
Jan Kara146bca72009-03-16 18:27:37 +01002127static int udf_sync_fs(struct super_block *sb, int wait)
2128{
2129 struct udf_sb_info *sbi = UDF_SB(sb);
2130
2131 mutex_lock(&sbi->s_alloc_mutex);
2132 if (sbi->s_lvid_dirty) {
2133 /*
2134 * Blockdevice will be synced later so we don't have to submit
2135 * the buffer for IO
2136 */
2137 mark_buffer_dirty(sbi->s_lvid_bh);
2138 sb->s_dirt = 0;
2139 sbi->s_lvid_dirty = 0;
2140 }
2141 mutex_unlock(&sbi->s_alloc_mutex);
2142
2143 return 0;
2144}
2145
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002146static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147{
David Howells726c3342006-06-23 02:02:58 -07002148 struct super_block *sb = dentry->d_sb;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002149 struct udf_sb_info *sbi = UDF_SB(sb);
2150 struct logicalVolIntegrityDescImpUse *lvidiu;
Coly Li557f5a12009-01-20 01:36:55 +08002151 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002152
2153 if (sbi->s_lvid_bh != NULL)
2154 lvidiu = udf_sb_lvidiu(sbi);
2155 else
2156 lvidiu = NULL;
David Howells726c3342006-06-23 02:02:58 -07002157
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158 buf->f_type = UDF_SUPER_MAGIC;
2159 buf->f_bsize = sb->s_blocksize;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002160 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002161 buf->f_bfree = udf_count_free(sb);
2162 buf->f_bavail = buf->f_bfree;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002163 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2164 le32_to_cpu(lvidiu->numDirs)) : 0)
2165 + buf->f_bfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166 buf->f_ffree = buf->f_bfree;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002167 buf->f_namelen = UDF_NAME_LEN - 2;
Coly Li557f5a12009-01-20 01:36:55 +08002168 buf->f_fsid.val[0] = (u32)id;
2169 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170
2171 return 0;
2172}
2173
Marcin Slusarz4b111112008-02-08 04:20:36 -08002174static unsigned int udf_count_free_bitmap(struct super_block *sb,
2175 struct udf_bitmap *bitmap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176{
2177 struct buffer_head *bh = NULL;
2178 unsigned int accum = 0;
2179 int index;
2180 int block = 0, newblock;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002181 struct kernel_lb_addr loc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182 uint32_t bytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002183 uint8_t *ptr;
2184 uint16_t ident;
2185 struct spaceBitmapDesc *bm;
2186
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187 loc.logicalBlockNum = bitmap->s_extPosition;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002188 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
Pekka Enberg97e961f2008-10-15 12:29:03 +02002189 bh = udf_read_ptagged(sb, &loc, 0, &ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002190
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002191 if (!bh) {
Joe Perches78ace702011-10-10 01:08:05 -07002192 udf_err(sb, "udf_count_free failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002193 goto out;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002194 } else if (ident != TAG_IDENT_SBD) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002195 brelse(bh);
Joe Perches78ace702011-10-10 01:08:05 -07002196 udf_err(sb, "udf_count_free failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002197 goto out;
2198 }
2199
2200 bm = (struct spaceBitmapDesc *)bh->b_data;
2201 bytes = le32_to_cpu(bm->numOfBytes);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002202 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2203 ptr = (uint8_t *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002204
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002205 while (bytes > 0) {
Marcin Slusarz01b954a2008-02-02 22:37:07 +01002206 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2207 accum += bitmap_weight((const unsigned long *)(ptr + index),
2208 cur_bytes * 8);
2209 bytes -= cur_bytes;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002210 if (bytes) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002211 brelse(bh);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002212 newblock = udf_get_lb_pblock(sb, &loc, ++block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002213 bh = udf_tread(sb, newblock);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002214 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002215 udf_debug("read failed\n");
2216 goto out;
2217 }
2218 index = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002219 ptr = (uint8_t *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220 }
2221 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07002222 brelse(bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002223out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224 return accum;
2225}
2226
Marcin Slusarz4b111112008-02-08 04:20:36 -08002227static unsigned int udf_count_free_table(struct super_block *sb,
2228 struct inode *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229{
2230 unsigned int accum = 0;
Jan Karaff116fc2007-05-08 00:35:14 -07002231 uint32_t elen;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002232 struct kernel_lb_addr eloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002233 int8_t etype;
Jan Karaff116fc2007-05-08 00:35:14 -07002234 struct extent_position epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002235
Jan Karad1668fe2010-10-20 23:24:12 +02002236 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
Marcin Slusarzc0b34432008-02-08 04:20:42 -08002237 epos.block = UDF_I(table)->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -07002238 epos.offset = sizeof(struct unallocSpaceEntry);
2239 epos.bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002240
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002241 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002242 accum += (elen >> table->i_sb->s_blocksize_bits);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002243
Jan Kara3bf25cb2007-05-08 00:35:16 -07002244 brelse(epos.bh);
Jan Karad1668fe2010-10-20 23:24:12 +02002245 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002246
2247 return accum;
2248}
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002249
2250static unsigned int udf_count_free(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251{
2252 unsigned int accum = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002253 struct udf_sb_info *sbi;
2254 struct udf_part_map *map;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002255
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002256 sbi = UDF_SB(sb);
2257 if (sbi->s_lvid_bh) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002258 struct logicalVolIntegrityDesc *lvid =
2259 (struct logicalVolIntegrityDesc *)
2260 sbi->s_lvid_bh->b_data;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002261 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002262 accum = le32_to_cpu(
2263 lvid->freeSpaceTable[sbi->s_partition]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002264 if (accum == 0xFFFFFFFF)
2265 accum = 0;
2266 }
2267 }
2268
2269 if (accum)
2270 return accum;
2271
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002272 map = &sbi->s_partmaps[sbi->s_partition];
2273 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002274 accum += udf_count_free_bitmap(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002275 map->s_uspace.s_bitmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002276 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002277 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002278 accum += udf_count_free_bitmap(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002279 map->s_fspace.s_bitmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002280 }
2281 if (accum)
2282 return accum;
2283
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002284 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002285 accum += udf_count_free_table(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002286 map->s_uspace.s_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002287 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002288 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002289 accum += udf_count_free_table(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002290 map->s_fspace.s_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002291 }
2292
2293 return accum;
2294}