blob: 7f0e18aa25d4484fd42c78f4edef001056e1c74f [file] [log] [blame]
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070078static char error_buf[1024];
79
80/* 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 *);
Miklos Szeredi6da80892008-02-08 04:21:50 -080094static int udf_show_options(struct seq_file *, struct vfsmount *);
Adrian Bunkb8145a72008-02-17 10:19:55 +020095static void udf_error(struct super_block *sb, const char *function,
96 const char *fmt, ...);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
Marcin Slusarz6c79e982008-02-08 04:20:30 -080098struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
99{
Marcin Slusarz4b111112008-02-08 04:20:36 -0800100 struct logicalVolIntegrityDesc *lvid =
101 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800102 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800103 __u32 offset = number_of_partitions * 2 *
104 sizeof(uint32_t)/sizeof(uint8_t);
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800105 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
106}
107
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108/* UDF filesystem type */
Al Viro152a0832010-07-25 00:46:55 +0400109static struct dentry *udf_mount(struct file_system_type *fs_type,
110 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111{
Al Viro152a0832010-07-25 00:46:55 +0400112 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113}
114
115static struct file_system_type udf_fstype = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700116 .owner = THIS_MODULE,
117 .name = "udf",
Al Viro152a0832010-07-25 00:46:55 +0400118 .mount = udf_mount,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700119 .kill_sb = kill_block_super,
120 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121};
122
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700123static struct kmem_cache *udf_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
125static struct inode *udf_alloc_inode(struct super_block *sb)
126{
127 struct udf_inode_info *ei;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800128 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 if (!ei)
130 return NULL;
Dan Bastone95f87972006-08-13 23:24:18 -0700131
132 ei->i_unique = 0;
133 ei->i_lenExtents = 0;
134 ei->i_next_alloc_block = 0;
135 ei->i_next_alloc_goal = 0;
136 ei->i_strat4096 = 0;
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100137 init_rwsem(&ei->i_data_sem);
Dan Bastone95f87972006-08-13 23:24:18 -0700138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 return &ei->vfs_inode;
140}
141
Nick Pigginfa0d7e32011-01-07 17:49:49 +1100142static void udf_i_callback(struct rcu_head *head)
143{
144 struct inode *inode = container_of(head, struct inode, i_rcu);
145 INIT_LIST_HEAD(&inode->i_dentry);
146 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
147}
148
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149static void udf_destroy_inode(struct inode *inode)
150{
Nick Pigginfa0d7e32011-01-07 17:49:49 +1100151 call_rcu(&inode->i_rcu, udf_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152}
153
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700154static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700156 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
Christoph Lametera35afb82007-05-16 22:10:57 -0700158 ei->i_ext.i_data = NULL;
159 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160}
161
162static int init_inodecache(void)
163{
164 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
165 sizeof(struct udf_inode_info),
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700166 0, (SLAB_RECLAIM_ACCOUNT |
167 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900168 init_once);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700169 if (!udf_inode_cachep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 return -ENOMEM;
171 return 0;
172}
173
174static void destroy_inodecache(void)
175{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700176 kmem_cache_destroy(udf_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177}
178
179/* Superblock operations */
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800180static const struct super_operations udf_sb_ops = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700181 .alloc_inode = udf_alloc_inode,
182 .destroy_inode = udf_destroy_inode,
183 .write_inode = udf_write_inode,
Al Viro3aac2b62010-06-07 00:43:39 -0400184 .evict_inode = udf_evict_inode,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700185 .put_super = udf_put_super,
Jan Kara146bca72009-03-16 18:27:37 +0100186 .sync_fs = udf_sync_fs,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700187 .statfs = udf_statfs,
188 .remount_fs = udf_remount_fs,
Miklos Szeredi6da80892008-02-08 04:21:50 -0800189 .show_options = udf_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190};
191
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700192struct udf_options {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 unsigned char novrs;
194 unsigned int blocksize;
195 unsigned int session;
196 unsigned int lastblock;
197 unsigned int anchor;
198 unsigned int volume;
199 unsigned short partition;
200 unsigned int fileset;
201 unsigned int rootdir;
202 unsigned int flags;
203 mode_t umask;
204 gid_t gid;
205 uid_t uid;
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100206 mode_t fmode;
207 mode_t dmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 struct nls_table *nls_map;
209};
210
211static int __init init_udf_fs(void)
212{
213 int err;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700214
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 err = init_inodecache();
216 if (err)
217 goto out1;
218 err = register_filesystem(&udf_fstype);
219 if (err)
220 goto out;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 return 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700223
224out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 destroy_inodecache();
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700226
227out1:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 return err;
229}
230
231static void __exit exit_udf_fs(void)
232{
233 unregister_filesystem(&udf_fstype);
234 destroy_inodecache();
235}
236
237module_init(init_udf_fs)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700238module_exit(exit_udf_fs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -0800240static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
241{
242 struct udf_sb_info *sbi = UDF_SB(sb);
243
244 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
245 GFP_KERNEL);
246 if (!sbi->s_partmaps) {
Harvey Harrison8e24eea2008-04-30 00:55:09 -0700247 udf_error(sb, __func__,
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -0800248 "Unable to allocate space for %d partition maps",
249 count);
250 sbi->s_partitions = 0;
251 return -ENOMEM;
252 }
253
254 sbi->s_partitions = count;
255 return 0;
256}
257
Miklos Szeredi6da80892008-02-08 04:21:50 -0800258static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
259{
260 struct super_block *sb = mnt->mnt_sb;
261 struct udf_sb_info *sbi = UDF_SB(sb);
262
263 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
264 seq_puts(seq, ",nostrict");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +0100265 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
Miklos Szeredi6da80892008-02-08 04:21:50 -0800266 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
267 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
268 seq_puts(seq, ",unhide");
269 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
270 seq_puts(seq, ",undelete");
271 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
272 seq_puts(seq, ",noadinicb");
273 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
274 seq_puts(seq, ",shortad");
275 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
276 seq_puts(seq, ",uid=forget");
277 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
278 seq_puts(seq, ",uid=ignore");
279 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
280 seq_puts(seq, ",gid=forget");
281 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
282 seq_puts(seq, ",gid=ignore");
283 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
284 seq_printf(seq, ",uid=%u", sbi->s_uid);
285 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
286 seq_printf(seq, ",gid=%u", sbi->s_gid);
287 if (sbi->s_umask != 0)
288 seq_printf(seq, ",umask=%o", sbi->s_umask);
Marcin Slusarz87bc7302008-12-02 13:40:11 +0100289 if (sbi->s_fmode != UDF_INVALID_MODE)
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100290 seq_printf(seq, ",mode=%o", sbi->s_fmode);
Marcin Slusarz87bc7302008-12-02 13:40:11 +0100291 if (sbi->s_dmode != UDF_INVALID_MODE)
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100292 seq_printf(seq, ",dmode=%o", sbi->s_dmode);
Miklos Szeredi6da80892008-02-08 04:21:50 -0800293 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
294 seq_printf(seq, ",session=%u", sbi->s_session);
295 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
296 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
Jan Kara40346002009-03-19 16:21:38 +0100297 if (sbi->s_anchor != 0)
298 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
Miklos Szeredi6da80892008-02-08 04:21:50 -0800299 /*
300 * volume, partition, fileset and rootdir seem to be ignored
301 * currently
302 */
303 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
304 seq_puts(seq, ",utf8");
305 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
306 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
307
308 return 0;
309}
310
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311/*
312 * udf_parse_options
313 *
314 * PURPOSE
315 * Parse mount options.
316 *
317 * DESCRIPTION
318 * The following mount options are supported:
319 *
320 * gid= Set the default group.
321 * umask= Set the default umask.
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100322 * mode= Set the default file permissions.
323 * dmode= Set the default directory permissions.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 * uid= Set the default user.
325 * bs= Set the block size.
326 * unhide Show otherwise hidden files.
327 * undelete Show deleted files in lists.
328 * adinicb Embed data in the inode (default)
329 * noadinicb Don't embed data in the inode
330 * shortad Use short ad's
331 * longad Use long ad's (default)
332 * nostrict Unset strict conformance
333 * iocharset= Set the NLS character set
334 *
335 * The remaining are for debugging and disaster recovery:
336 *
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700337 * novrs Skip volume sequence recognition
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 *
339 * The following expect a offset from 0.
340 *
341 * session= Set the CDROM session (default= last session)
342 * anchor= Override standard anchor location. (default= 256)
343 * volume= Override the VolumeDesc location. (unused)
344 * partition= Override the PartitionDesc location. (unused)
345 * lastblock= Set the last block of the filesystem/
346 *
347 * The following expect a offset from the partition root.
348 *
349 * fileset= Override the fileset block location. (unused)
350 * rootdir= Override the root directory location. (unused)
351 * WARNING: overriding the rootdir to a non-directory may
352 * yield highly unpredictable results.
353 *
354 * PRE-CONDITIONS
355 * options Pointer to mount options string.
356 * uopts Pointer to mount options variable.
357 *
358 * POST-CONDITIONS
359 * <return> 1 Mount options parsed okay.
360 * <return> 0 Error parsing mount options.
361 *
362 * HISTORY
363 * July 1, 1997 - Andrew E. Mileski
364 * Written, tested, and released.
365 */
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367enum {
368 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
369 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
370 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
371 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
372 Opt_rootdir, Opt_utf8, Opt_iocharset,
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100373 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
374 Opt_fmode, Opt_dmode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375};
376
Steven Whitehousea447c092008-10-13 10:46:57 +0100377static const match_table_t tokens = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700378 {Opt_novrs, "novrs"},
379 {Opt_nostrict, "nostrict"},
380 {Opt_bs, "bs=%u"},
381 {Opt_unhide, "unhide"},
382 {Opt_undelete, "undelete"},
383 {Opt_noadinicb, "noadinicb"},
384 {Opt_adinicb, "adinicb"},
385 {Opt_shortad, "shortad"},
386 {Opt_longad, "longad"},
387 {Opt_uforget, "uid=forget"},
388 {Opt_uignore, "uid=ignore"},
389 {Opt_gforget, "gid=forget"},
390 {Opt_gignore, "gid=ignore"},
391 {Opt_gid, "gid=%u"},
392 {Opt_uid, "uid=%u"},
393 {Opt_umask, "umask=%o"},
394 {Opt_session, "session=%u"},
395 {Opt_lastblock, "lastblock=%u"},
396 {Opt_anchor, "anchor=%u"},
397 {Opt_volume, "volume=%u"},
398 {Opt_partition, "partition=%u"},
399 {Opt_fileset, "fileset=%u"},
400 {Opt_rootdir, "rootdir=%u"},
401 {Opt_utf8, "utf8"},
402 {Opt_iocharset, "iocharset=%s"},
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100403 {Opt_fmode, "mode=%o"},
404 {Opt_dmode, "dmode=%o"},
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700405 {Opt_err, NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406};
407
Miklos Szeredi6da80892008-02-08 04:21:50 -0800408static int udf_parse_options(char *options, struct udf_options *uopt,
409 bool remount)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410{
411 char *p;
412 int option;
413
414 uopt->novrs = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 uopt->partition = 0xFFFF;
416 uopt->session = 0xFFFFFFFF;
417 uopt->lastblock = 0;
418 uopt->anchor = 0;
419 uopt->volume = 0xFFFFFFFF;
420 uopt->rootdir = 0xFFFFFFFF;
421 uopt->fileset = 0xFFFFFFFF;
422 uopt->nls_map = NULL;
423
424 if (!options)
425 return 1;
426
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700427 while ((p = strsep(&options, ",")) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 substring_t args[MAX_OPT_ARGS];
429 int token;
430 if (!*p)
431 continue;
432
433 token = match_token(p, tokens, args);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700434 switch (token) {
435 case Opt_novrs:
436 uopt->novrs = 1;
Clemens Ladisch41368012009-03-06 09:16:49 +0100437 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700438 case Opt_bs:
439 if (match_int(&args[0], &option))
440 return 0;
441 uopt->blocksize = option;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +0100442 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700443 break;
444 case Opt_unhide:
445 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
446 break;
447 case Opt_undelete:
448 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
449 break;
450 case Opt_noadinicb:
451 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
452 break;
453 case Opt_adinicb:
454 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
455 break;
456 case Opt_shortad:
457 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
458 break;
459 case Opt_longad:
460 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
461 break;
462 case Opt_gid:
463 if (match_int(args, &option))
464 return 0;
465 uopt->gid = option;
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -0700466 uopt->flags |= (1 << UDF_FLAG_GID_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700467 break;
468 case Opt_uid:
469 if (match_int(args, &option))
470 return 0;
471 uopt->uid = option;
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -0700472 uopt->flags |= (1 << UDF_FLAG_UID_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700473 break;
474 case Opt_umask:
475 if (match_octal(args, &option))
476 return 0;
477 uopt->umask = option;
478 break;
479 case Opt_nostrict:
480 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
481 break;
482 case Opt_session:
483 if (match_int(args, &option))
484 return 0;
485 uopt->session = option;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800486 if (!remount)
487 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700488 break;
489 case Opt_lastblock:
490 if (match_int(args, &option))
491 return 0;
492 uopt->lastblock = option;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800493 if (!remount)
494 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700495 break;
496 case Opt_anchor:
497 if (match_int(args, &option))
498 return 0;
499 uopt->anchor = option;
500 break;
501 case Opt_volume:
502 if (match_int(args, &option))
503 return 0;
504 uopt->volume = option;
505 break;
506 case Opt_partition:
507 if (match_int(args, &option))
508 return 0;
509 uopt->partition = option;
510 break;
511 case Opt_fileset:
512 if (match_int(args, &option))
513 return 0;
514 uopt->fileset = option;
515 break;
516 case Opt_rootdir:
517 if (match_int(args, &option))
518 return 0;
519 uopt->rootdir = option;
520 break;
521 case Opt_utf8:
522 uopt->flags |= (1 << UDF_FLAG_UTF8);
523 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524#ifdef CONFIG_UDF_NLS
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700525 case Opt_iocharset:
526 uopt->nls_map = load_nls(args[0].from);
527 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
528 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529#endif
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700530 case Opt_uignore:
531 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
532 break;
533 case Opt_uforget:
534 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
535 break;
536 case Opt_gignore:
537 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
538 break;
539 case Opt_gforget:
540 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
541 break;
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100542 case Opt_fmode:
543 if (match_octal(args, &option))
544 return 0;
545 uopt->fmode = option & 0777;
546 break;
547 case Opt_dmode:
548 if (match_octal(args, &option))
549 return 0;
550 uopt->dmode = option & 0777;
551 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700552 default:
553 printk(KERN_ERR "udf: bad mount option \"%s\" "
554 "or missing value\n", p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 return 0;
556 }
557 }
558 return 1;
559}
560
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700561static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562{
563 struct udf_options uopt;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800564 struct udf_sb_info *sbi = UDF_SB(sb);
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400565 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800567 uopt.flags = sbi->s_flags;
568 uopt.uid = sbi->s_uid;
569 uopt.gid = sbi->s_gid;
570 uopt.umask = sbi->s_umask;
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100571 uopt.fmode = sbi->s_fmode;
572 uopt.dmode = sbi->s_dmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573
Miklos Szeredi6da80892008-02-08 04:21:50 -0800574 if (!udf_parse_options(options, &uopt, true))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 return -EINVAL;
576
Jan Karac03cad22010-10-20 22:17:28 +0200577 write_lock(&sbi->s_cred_lock);
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800578 sbi->s_flags = uopt.flags;
579 sbi->s_uid = uopt.uid;
580 sbi->s_gid = uopt.gid;
581 sbi->s_umask = uopt.umask;
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100582 sbi->s_fmode = uopt.fmode;
583 sbi->s_dmode = uopt.dmode;
Jan Karac03cad22010-10-20 22:17:28 +0200584 write_unlock(&sbi->s_cred_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800586 if (sbi->s_lvid_bh) {
587 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 if (write_rev > UDF_MAX_WRITE_VERSION)
589 *flags |= MS_RDONLY;
590 }
591
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400592 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
593 goto out_unlock;
594
Jan Kara36350462010-05-19 16:28:56 +0200595 if (*flags & MS_RDONLY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 udf_close_lvid(sb);
Jan Kara36350462010-05-19 16:28:56 +0200597 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 udf_open_lvid(sb);
599
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400600out_unlock:
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400601 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602}
603
Jan Kara40346002009-03-19 16:21:38 +0100604/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
605/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
606static loff_t udf_check_vsd(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607{
608 struct volStructDesc *vsd = NULL;
Sebastian Manciuleaf4bcbbd2008-04-08 14:02:11 +0200609 loff_t sector = 32768;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 int sectorsize;
611 struct buffer_head *bh = NULL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700612 int nsr02 = 0;
613 int nsr03 = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800614 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800616 sbi = UDF_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 if (sb->s_blocksize < sizeof(struct volStructDesc))
618 sectorsize = sizeof(struct volStructDesc);
619 else
620 sectorsize = sb->s_blocksize;
621
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800622 sector += (sbi->s_session << sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
624 udf_debug("Starting at sector %u (%ld byte sectors)\n",
Sebastian Manciulea706047a2008-04-14 17:13:01 +0200625 (unsigned int)(sector >> sb->s_blocksize_bits),
626 sb->s_blocksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 /* Process the sequence (if applicable) */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700628 for (; !nsr02 && !nsr03; sector += sectorsize) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 /* Read a block */
630 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
631 if (!bh)
632 break;
633
634 /* Look for ISO descriptors */
635 vsd = (struct volStructDesc *)(bh->b_data +
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800636 (sector & (sb->s_blocksize - 1)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700638 if (vsd->stdIdent[0] == 0) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700639 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 break;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800641 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
642 VSD_STD_ID_LEN)) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700643 switch (vsd->structType) {
644 case 0:
645 udf_debug("ISO9660 Boot Record found\n");
646 break;
647 case 1:
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800648 udf_debug("ISO9660 Primary Volume Descriptor "
649 "found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700650 break;
651 case 2:
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800652 udf_debug("ISO9660 Supplementary Volume "
653 "Descriptor found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700654 break;
655 case 3:
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800656 udf_debug("ISO9660 Volume Partition Descriptor "
657 "found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700658 break;
659 case 255:
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800660 udf_debug("ISO9660 Volume Descriptor Set "
661 "Terminator found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700662 break;
663 default:
664 udf_debug("ISO9660 VRS (%u) found\n",
665 vsd->structType);
666 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 }
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800668 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
669 VSD_STD_ID_LEN))
670 ; /* nothing */
671 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
672 VSD_STD_ID_LEN)) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700673 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 break;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800675 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
676 VSD_STD_ID_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 nsr02 = sector;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800678 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
679 VSD_STD_ID_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 nsr03 = sector;
Jan Kara3bf25cb2007-05-08 00:35:16 -0700681 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 }
683
684 if (nsr03)
685 return nsr03;
686 else if (nsr02)
687 return nsr02;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800688 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 return -1;
690 else
691 return 0;
692}
693
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800694static int udf_find_fileset(struct super_block *sb,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200695 struct kernel_lb_addr *fileset,
696 struct kernel_lb_addr *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697{
698 struct buffer_head *bh = NULL;
699 long lastblock;
700 uint16_t ident;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800701 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702
703 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700704 fileset->partitionReferenceNum != 0xFFFF) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200705 bh = udf_read_ptagged(sb, fileset, 0, &ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700707 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 return 1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700709 } else if (ident != TAG_IDENT_FSD) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700710 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 return 1;
712 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700713
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 }
715
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800716 sbi = UDF_SB(sb);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800717 if (!bh) {
718 /* Search backwards through the partitions */
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200719 struct kernel_lb_addr newfileset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700721/* --> cvg: FIXME - is it reasonable? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 return 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700723
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800724 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700725 (newfileset.partitionReferenceNum != 0xFFFF &&
726 fileset->logicalBlockNum == 0xFFFFFFFF &&
727 fileset->partitionReferenceNum == 0xFFFF);
728 newfileset.partitionReferenceNum--) {
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800729 lastblock = sbi->s_partmaps
730 [newfileset.partitionReferenceNum]
731 .s_partition_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 newfileset.logicalBlockNum = 0;
733
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700734 do {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200735 bh = udf_read_ptagged(sb, &newfileset, 0,
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800736 &ident);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700737 if (!bh) {
738 newfileset.logicalBlockNum++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 continue;
740 }
741
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700742 switch (ident) {
743 case TAG_IDENT_SBD:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700744 {
745 struct spaceBitmapDesc *sp;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800746 sp = (struct spaceBitmapDesc *)
747 bh->b_data;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700748 newfileset.logicalBlockNum += 1 +
749 ((le32_to_cpu(sp->numOfBytes) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800750 sizeof(struct spaceBitmapDesc)
751 - 1) >> sb->s_blocksize_bits);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700752 brelse(bh);
753 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700755 case TAG_IDENT_FSD:
756 *fileset = newfileset;
757 break;
758 default:
759 newfileset.logicalBlockNum++;
760 brelse(bh);
761 bh = NULL;
762 break;
763 }
764 } while (newfileset.logicalBlockNum < lastblock &&
765 fileset->logicalBlockNum == 0xFFFFFFFF &&
766 fileset->partitionReferenceNum == 0xFFFF);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 }
768 }
769
770 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700771 fileset->partitionReferenceNum != 0xFFFF) && bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 udf_debug("Fileset at block=%d, partition=%d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700773 fileset->logicalBlockNum,
774 fileset->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800776 sbi->s_partition = fileset->partitionReferenceNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 udf_load_fileset(sb, bh, root);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700778 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 return 0;
780 }
781 return 1;
782}
783
Jan Karac0eb31e2008-04-01 16:50:35 +0200784static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785{
786 struct primaryVolDesc *pvoldesc;
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100787 struct ustr *instr, *outstr;
Jan Karac0eb31e2008-04-01 16:50:35 +0200788 struct buffer_head *bh;
789 uint16_t ident;
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100790 int ret = 1;
791
792 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
793 if (!instr)
794 return 1;
795
796 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
797 if (!outstr)
798 goto out1;
Jan Karac0eb31e2008-04-01 16:50:35 +0200799
800 bh = udf_read_tagged(sb, block, block, &ident);
801 if (!bh)
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100802 goto out2;
803
Jan Karac0eb31e2008-04-01 16:50:35 +0200804 BUG_ON(ident != TAG_IDENT_PVD);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805
806 pvoldesc = (struct primaryVolDesc *)bh->b_data;
807
Marcin Slusarz56774802008-02-10 11:25:31 +0100808 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
809 pvoldesc->recordingDateAndTime)) {
Marcin Slusarzaf15a292008-02-10 11:29:10 +0100810#ifdef UDFFS_DEBUG
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200811 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +0100812 udf_debug("recording time %04u/%02u/%02u"
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800813 " %02u:%02u (%x)\n",
Marcin Slusarzaf15a292008-02-10 11:29:10 +0100814 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
815 ts->minute, le16_to_cpu(ts->typeAndTimezone));
816#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 }
818
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100819 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
820 if (udf_CS0toUTF8(outstr, instr)) {
821 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
822 outstr->u_len > 31 ? 31 : outstr->u_len);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800823 udf_debug("volIdent[] = '%s'\n",
824 UDF_SB(sb)->s_volume_ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100827 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
828 if (udf_CS0toUTF8(outstr, instr))
829 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
Jan Karac0eb31e2008-04-01 16:50:35 +0200830
831 brelse(bh);
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100832 ret = 0;
833out2:
834 kfree(outstr);
835out1:
836 kfree(instr);
837 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838}
839
Jan Karabfb257a2008-04-08 20:37:21 +0200840static int udf_load_metadata_files(struct super_block *sb, int partition)
841{
842 struct udf_sb_info *sbi = UDF_SB(sb);
843 struct udf_part_map *map;
844 struct udf_meta_data *mdata;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200845 struct kernel_lb_addr addr;
Jan Karabfb257a2008-04-08 20:37:21 +0200846 int fe_error = 0;
847
848 map = &sbi->s_partmaps[partition];
849 mdata = &map->s_type_specific.s_metadata;
850
851 /* metadata address */
852 addr.logicalBlockNum = mdata->s_meta_file_loc;
853 addr.partitionReferenceNum = map->s_partition_num;
854
855 udf_debug("Metadata file location: block = %d part = %d\n",
856 addr.logicalBlockNum, addr.partitionReferenceNum);
857
Pekka Enberg97e961f2008-10-15 12:29:03 +0200858 mdata->s_metadata_fe = udf_iget(sb, &addr);
Jan Karabfb257a2008-04-08 20:37:21 +0200859
860 if (mdata->s_metadata_fe == NULL) {
861 udf_warning(sb, __func__, "metadata inode efe not found, "
862 "will try mirror inode.");
863 fe_error = 1;
864 } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type !=
865 ICBTAG_FLAG_AD_SHORT) {
866 udf_warning(sb, __func__, "metadata inode efe does not have "
867 "short allocation descriptors!");
868 fe_error = 1;
869 iput(mdata->s_metadata_fe);
870 mdata->s_metadata_fe = NULL;
871 }
872
873 /* mirror file entry */
874 addr.logicalBlockNum = mdata->s_mirror_file_loc;
875 addr.partitionReferenceNum = map->s_partition_num;
876
877 udf_debug("Mirror metadata file location: block = %d part = %d\n",
878 addr.logicalBlockNum, addr.partitionReferenceNum);
879
Pekka Enberg97e961f2008-10-15 12:29:03 +0200880 mdata->s_mirror_fe = udf_iget(sb, &addr);
Jan Karabfb257a2008-04-08 20:37:21 +0200881
882 if (mdata->s_mirror_fe == NULL) {
883 if (fe_error) {
884 udf_error(sb, __func__, "mirror inode efe not found "
885 "and metadata inode is missing too, exiting...");
886 goto error_exit;
887 } else
888 udf_warning(sb, __func__, "mirror inode efe not found,"
889 " but metadata inode is OK");
890 } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type !=
891 ICBTAG_FLAG_AD_SHORT) {
892 udf_warning(sb, __func__, "mirror inode efe does not have "
893 "short allocation descriptors!");
894 iput(mdata->s_mirror_fe);
895 mdata->s_mirror_fe = NULL;
896 if (fe_error)
897 goto error_exit;
898 }
899
900 /*
901 * bitmap file entry
902 * Note:
903 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
904 */
905 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
906 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
907 addr.partitionReferenceNum = map->s_partition_num;
908
909 udf_debug("Bitmap file location: block = %d part = %d\n",
910 addr.logicalBlockNum, addr.partitionReferenceNum);
911
Pekka Enberg97e961f2008-10-15 12:29:03 +0200912 mdata->s_bitmap_fe = udf_iget(sb, &addr);
Jan Karabfb257a2008-04-08 20:37:21 +0200913
914 if (mdata->s_bitmap_fe == NULL) {
915 if (sb->s_flags & MS_RDONLY)
916 udf_warning(sb, __func__, "bitmap inode efe "
917 "not found but it's ok since the disc"
918 " is mounted read-only");
919 else {
920 udf_error(sb, __func__, "bitmap inode efe not "
921 "found and attempted read-write mount");
922 goto error_exit;
923 }
924 }
925 }
926
927 udf_debug("udf_load_metadata_files Ok\n");
928
929 return 0;
930
931error_exit:
932 return 1;
933}
934
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700935static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200936 struct kernel_lb_addr *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937{
938 struct fileSetDesc *fset;
939
940 fset = (struct fileSetDesc *)bh->b_data;
941
942 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
943
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800944 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700946 udf_debug("Rootdir at block=%d, partition=%d\n",
947 root->logicalBlockNum, root->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948}
949
Marcin Slusarz883cb9d2008-02-08 04:20:34 -0800950int udf_compute_nr_groups(struct super_block *sb, u32 partition)
951{
952 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
Julia Lawall8dee00b2008-02-14 16:15:45 +0100953 return DIV_ROUND_UP(map->s_partition_len +
954 (sizeof(struct spaceBitmapDesc) << 3),
955 sb->s_blocksize * 8);
Marcin Slusarz883cb9d2008-02-08 04:20:34 -0800956}
957
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800958static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
959{
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800960 struct udf_bitmap *bitmap;
961 int nr_groups;
962 int size;
963
Marcin Slusarz883cb9d2008-02-08 04:20:34 -0800964 nr_groups = udf_compute_nr_groups(sb, index);
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800965 size = sizeof(struct udf_bitmap) +
966 (sizeof(struct buffer_head *) * nr_groups);
967
968 if (size <= PAGE_SIZE)
Joe Perchesed2ae6f2010-11-04 20:08:04 -0700969 bitmap = kzalloc(size, GFP_KERNEL);
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800970 else
Joe Perchesed2ae6f2010-11-04 20:08:04 -0700971 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800972
973 if (bitmap == NULL) {
Harvey Harrison8e24eea2008-04-30 00:55:09 -0700974 udf_error(sb, __func__,
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800975 "Unable to allocate space for bitmap "
976 "and %d buffer_head pointers", nr_groups);
977 return NULL;
978 }
979
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800980 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
981 bitmap->s_nr_groups = nr_groups;
982 return bitmap;
983}
984
Jan Kara3fb38df2008-04-02 12:26:36 +0200985static int udf_fill_partdesc_info(struct super_block *sb,
986 struct partitionDesc *p, int p_index)
987{
988 struct udf_part_map *map;
989 struct udf_sb_info *sbi = UDF_SB(sb);
990 struct partitionHeaderDesc *phd;
991
992 map = &sbi->s_partmaps[p_index];
993
994 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
995 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
996
997 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
998 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
999 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1000 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1001 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1002 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1003 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1004 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1005
Sebastian Manciulea706047a2008-04-14 17:13:01 +02001006 udf_debug("Partition (%d type %x) starts at physical %d, "
1007 "block length %d\n", p_index,
Jan Kara3fb38df2008-04-02 12:26:36 +02001008 map->s_partition_type, map->s_partition_root,
1009 map->s_partition_len);
1010
1011 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1012 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1013 return 0;
1014
1015 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1016 if (phd->unallocSpaceTable.extLength) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001017 struct kernel_lb_addr loc = {
Jan Kara3fb38df2008-04-02 12:26:36 +02001018 .logicalBlockNum = le32_to_cpu(
1019 phd->unallocSpaceTable.extPosition),
1020 .partitionReferenceNum = p_index,
1021 };
1022
Pekka Enberg97e961f2008-10-15 12:29:03 +02001023 map->s_uspace.s_table = udf_iget(sb, &loc);
Jan Kara3fb38df2008-04-02 12:26:36 +02001024 if (!map->s_uspace.s_table) {
1025 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1026 p_index);
1027 return 1;
1028 }
1029 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1030 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1031 p_index, map->s_uspace.s_table->i_ino);
1032 }
1033
1034 if (phd->unallocSpaceBitmap.extLength) {
1035 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1036 if (!bitmap)
1037 return 1;
1038 map->s_uspace.s_bitmap = bitmap;
1039 bitmap->s_extLength = le32_to_cpu(
1040 phd->unallocSpaceBitmap.extLength);
1041 bitmap->s_extPosition = le32_to_cpu(
1042 phd->unallocSpaceBitmap.extPosition);
1043 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1044 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
1045 bitmap->s_extPosition);
1046 }
1047
1048 if (phd->partitionIntegrityTable.extLength)
1049 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1050
1051 if (phd->freedSpaceTable.extLength) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001052 struct kernel_lb_addr loc = {
Jan Kara3fb38df2008-04-02 12:26:36 +02001053 .logicalBlockNum = le32_to_cpu(
1054 phd->freedSpaceTable.extPosition),
1055 .partitionReferenceNum = p_index,
1056 };
1057
Pekka Enberg97e961f2008-10-15 12:29:03 +02001058 map->s_fspace.s_table = udf_iget(sb, &loc);
Jan Kara3fb38df2008-04-02 12:26:36 +02001059 if (!map->s_fspace.s_table) {
1060 udf_debug("cannot load freedSpaceTable (part %d)\n",
1061 p_index);
1062 return 1;
1063 }
1064
1065 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1066 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1067 p_index, map->s_fspace.s_table->i_ino);
1068 }
1069
1070 if (phd->freedSpaceBitmap.extLength) {
1071 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1072 if (!bitmap)
1073 return 1;
1074 map->s_fspace.s_bitmap = bitmap;
1075 bitmap->s_extLength = le32_to_cpu(
1076 phd->freedSpaceBitmap.extLength);
1077 bitmap->s_extPosition = le32_to_cpu(
1078 phd->freedSpaceBitmap.extPosition);
1079 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1080 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
1081 bitmap->s_extPosition);
1082 }
1083 return 0;
1084}
1085
Jan Karae971b0b2009-11-30 19:47:55 +01001086static void udf_find_vat_block(struct super_block *sb, int p_index,
1087 int type1_index, sector_t start_block)
1088{
1089 struct udf_sb_info *sbi = UDF_SB(sb);
1090 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1091 sector_t vat_block;
1092 struct kernel_lb_addr ino;
1093
1094 /*
1095 * VAT file entry is in the last recorded block. Some broken disks have
1096 * it a few blocks before so try a bit harder...
1097 */
1098 ino.partitionReferenceNum = type1_index;
1099 for (vat_block = start_block;
1100 vat_block >= map->s_partition_root &&
1101 vat_block >= start_block - 3 &&
1102 !sbi->s_vat_inode; vat_block--) {
1103 ino.logicalBlockNum = vat_block - map->s_partition_root;
1104 sbi->s_vat_inode = udf_iget(sb, &ino);
1105 }
1106}
1107
Jan Kara38b74a52008-04-02 16:01:35 +02001108static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1109{
1110 struct udf_sb_info *sbi = UDF_SB(sb);
1111 struct udf_part_map *map = &sbi->s_partmaps[p_index];
Jan Karafa5e0812008-04-08 02:08:53 +02001112 struct buffer_head *bh = NULL;
1113 struct udf_inode_info *vati;
1114 uint32_t pos;
1115 struct virtualAllocationTable20 *vat20;
Jan Kara4bf17af2009-07-14 19:30:23 +02001116 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
Jan Kara38b74a52008-04-02 16:01:35 +02001117
Jan Karae971b0b2009-11-30 19:47:55 +01001118 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
Jan Kara4bf17af2009-07-14 19:30:23 +02001119 if (!sbi->s_vat_inode &&
1120 sbi->s_last_block != blocks - 1) {
1121 printk(KERN_NOTICE "UDF-fs: Failed to read VAT inode from the"
1122 " last recorded block (%lu), retrying with the last "
1123 "block of the device (%lu).\n",
1124 (unsigned long)sbi->s_last_block,
1125 (unsigned long)blocks - 1);
Jan Karae971b0b2009-11-30 19:47:55 +01001126 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
Jan Kara4bf17af2009-07-14 19:30:23 +02001127 }
Jan Kara38b74a52008-04-02 16:01:35 +02001128 if (!sbi->s_vat_inode)
1129 return 1;
1130
1131 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
Sebastian Manciulea47c93582008-04-14 17:06:36 +02001132 map->s_type_specific.s_virtual.s_start_offset = 0;
Jan Kara38b74a52008-04-02 16:01:35 +02001133 map->s_type_specific.s_virtual.s_num_entries =
1134 (sbi->s_vat_inode->i_size - 36) >> 2;
1135 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
Jan Karafa5e0812008-04-08 02:08:53 +02001136 vati = UDF_I(sbi->s_vat_inode);
1137 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1138 pos = udf_block_map(sbi->s_vat_inode, 0);
1139 bh = sb_bread(sb, pos);
1140 if (!bh)
1141 return 1;
1142 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1143 } else {
1144 vat20 = (struct virtualAllocationTable20 *)
1145 vati->i_ext.i_data;
1146 }
Jan Kara38b74a52008-04-02 16:01:35 +02001147
Jan Kara38b74a52008-04-02 16:01:35 +02001148 map->s_type_specific.s_virtual.s_start_offset =
Sebastian Manciulea47c93582008-04-14 17:06:36 +02001149 le16_to_cpu(vat20->lengthHeader);
Jan Kara38b74a52008-04-02 16:01:35 +02001150 map->s_type_specific.s_virtual.s_num_entries =
1151 (sbi->s_vat_inode->i_size -
1152 map->s_type_specific.s_virtual.
1153 s_start_offset) >> 2;
1154 brelse(bh);
1155 }
1156 return 0;
1157}
1158
Jan Karac0eb31e2008-04-01 16:50:35 +02001159static int udf_load_partdesc(struct super_block *sb, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160{
Jan Karac0eb31e2008-04-01 16:50:35 +02001161 struct buffer_head *bh;
Jan Karac0eb31e2008-04-01 16:50:35 +02001162 struct partitionDesc *p;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001163 struct udf_part_map *map;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001164 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Kara38b74a52008-04-02 16:01:35 +02001165 int i, type1_idx;
Jan Karac0eb31e2008-04-01 16:50:35 +02001166 uint16_t partitionNumber;
1167 uint16_t ident;
1168 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169
Jan Karac0eb31e2008-04-01 16:50:35 +02001170 bh = udf_read_tagged(sb, block, block, &ident);
1171 if (!bh)
1172 return 1;
1173 if (ident != TAG_IDENT_PD)
1174 goto out_bh;
1175
1176 p = (struct partitionDesc *)bh->b_data;
1177 partitionNumber = le16_to_cpu(p->partitionNumber);
Jan Kara38b74a52008-04-02 16:01:35 +02001178
Jan Karabfb257a2008-04-08 20:37:21 +02001179 /* First scan for TYPE1, SPARABLE and METADATA partitions */
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001180 for (i = 0; i < sbi->s_partitions; i++) {
1181 map = &sbi->s_partmaps[i];
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001182 udf_debug("Searching map: (%d == %d)\n",
Marcin Slusarz165923f2008-02-10 11:33:08 +01001183 map->s_partition_num, partitionNumber);
Jan Kara38b74a52008-04-02 16:01:35 +02001184 if (map->s_partition_num == partitionNumber &&
1185 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1186 map->s_partition_type == UDF_SPARABLE_MAP15))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 break;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001188 }
1189
Jan Kara38b74a52008-04-02 16:01:35 +02001190 if (i >= sbi->s_partitions) {
Marcin Slusarz165923f2008-02-10 11:33:08 +01001191 udf_debug("Partition (%d) not found in partition map\n",
1192 partitionNumber);
Jan Karac0eb31e2008-04-01 16:50:35 +02001193 goto out_bh;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001194 }
1195
Jan Kara3fb38df2008-04-02 12:26:36 +02001196 ret = udf_fill_partdesc_info(sb, p, i);
Jan Kara38b74a52008-04-02 16:01:35 +02001197
1198 /*
Jan Karabfb257a2008-04-08 20:37:21 +02001199 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1200 * PHYSICAL partitions are already set up
Jan Kara38b74a52008-04-02 16:01:35 +02001201 */
1202 type1_idx = i;
1203 for (i = 0; i < sbi->s_partitions; i++) {
1204 map = &sbi->s_partmaps[i];
1205
1206 if (map->s_partition_num == partitionNumber &&
1207 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
Jan Karabfb257a2008-04-08 20:37:21 +02001208 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1209 map->s_partition_type == UDF_METADATA_MAP25))
Jan Kara38b74a52008-04-02 16:01:35 +02001210 break;
1211 }
1212
1213 if (i >= sbi->s_partitions)
1214 goto out_bh;
1215
1216 ret = udf_fill_partdesc_info(sb, p, i);
1217 if (ret)
1218 goto out_bh;
1219
Jan Karabfb257a2008-04-08 20:37:21 +02001220 if (map->s_partition_type == UDF_METADATA_MAP25) {
1221 ret = udf_load_metadata_files(sb, i);
1222 if (ret) {
1223 printk(KERN_ERR "UDF-fs: error loading MetaData "
1224 "partition map %d\n", i);
1225 goto out_bh;
1226 }
1227 } else {
1228 ret = udf_load_vat(sb, i, type1_idx);
1229 if (ret)
1230 goto out_bh;
1231 /*
1232 * Mark filesystem read-only if we have a partition with
1233 * virtual map since we don't handle writing to it (we
1234 * overwrite blocks instead of relocating them).
1235 */
1236 sb->s_flags |= MS_RDONLY;
1237 printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only "
1238 "because writing to pseudooverwrite partition is "
1239 "not implemented.\n");
1240 }
Jan Karac0eb31e2008-04-01 16:50:35 +02001241out_bh:
Jan Kara2e0838f2008-04-01 18:08:51 +02001242 /* In case loading failed, we handle cleanup in udf_fill_super */
Jan Karac0eb31e2008-04-01 16:50:35 +02001243 brelse(bh);
1244 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245}
1246
Jan Karac0eb31e2008-04-01 16:50:35 +02001247static int udf_load_logicalvol(struct super_block *sb, sector_t block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001248 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249{
1250 struct logicalVolDesc *lvd;
1251 int i, j, offset;
1252 uint8_t type;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001253 struct udf_sb_info *sbi = UDF_SB(sb);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001254 struct genericPartitionMap *gpm;
Jan Karac0eb31e2008-04-01 16:50:35 +02001255 uint16_t ident;
1256 struct buffer_head *bh;
1257 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258
Jan Karac0eb31e2008-04-01 16:50:35 +02001259 bh = udf_read_tagged(sb, block, block, &ident);
1260 if (!bh)
1261 return 1;
1262 BUG_ON(ident != TAG_IDENT_LVD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263 lvd = (struct logicalVolDesc *)bh->b_data;
1264
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -08001265 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
Jan Karac0eb31e2008-04-01 16:50:35 +02001266 if (i != 0) {
1267 ret = i;
1268 goto out_bh;
1269 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001271 for (i = 0, offset = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001272 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001273 i++, offset += gpm->partitionMapLength) {
1274 struct udf_part_map *map = &sbi->s_partmaps[i];
1275 gpm = (struct genericPartitionMap *)
1276 &(lvd->partitionMaps[offset]);
1277 type = gpm->partitionMapType;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001278 if (type == 1) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001279 struct genericPartitionMap1 *gpm1 =
1280 (struct genericPartitionMap1 *)gpm;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001281 map->s_partition_type = UDF_TYPE1_MAP15;
1282 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1283 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1284 map->s_partition_func = NULL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001285 } else if (type == 2) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001286 struct udfPartitionMap2 *upm2 =
1287 (struct udfPartitionMap2 *)gpm;
1288 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1289 strlen(UDF_ID_VIRTUAL))) {
1290 u16 suf =
1291 le16_to_cpu(((__le16 *)upm2->partIdent.
1292 identSuffix)[0]);
Jan Karac82a1272008-04-08 01:16:32 +02001293 if (suf < 0x0200) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001294 map->s_partition_type =
1295 UDF_VIRTUAL_MAP15;
1296 map->s_partition_func =
1297 udf_get_pblock_virt15;
Jan Karac82a1272008-04-08 01:16:32 +02001298 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001299 map->s_partition_type =
1300 UDF_VIRTUAL_MAP20;
1301 map->s_partition_func =
1302 udf_get_pblock_virt20;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 }
Marcin Slusarz4b111112008-02-08 04:20:36 -08001304 } else if (!strncmp(upm2->partIdent.ident,
1305 UDF_ID_SPARABLE,
1306 strlen(UDF_ID_SPARABLE))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 uint32_t loc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 struct sparingTable *st;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001309 struct sparablePartitionMap *spm =
1310 (struct sparablePartitionMap *)gpm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001312 map->s_partition_type = UDF_SPARABLE_MAP15;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001313 map->s_type_specific.s_sparing.s_packet_len =
1314 le16_to_cpu(spm->packetLength);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001315 for (j = 0; j < spm->numSparingTables; j++) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001316 struct buffer_head *bh2;
1317
1318 loc = le32_to_cpu(
1319 spm->locSparingTable[j]);
1320 bh2 = udf_read_tagged(sb, loc, loc,
1321 &ident);
1322 map->s_type_specific.s_sparing.
1323 s_spar_map[j] = bh2;
1324
Marcin Slusarz165923f2008-02-10 11:33:08 +01001325 if (bh2 == NULL)
1326 continue;
1327
1328 st = (struct sparingTable *)bh2->b_data;
1329 if (ident != 0 || strncmp(
1330 st->sparingIdent.ident,
1331 UDF_ID_SPARING,
1332 strlen(UDF_ID_SPARING))) {
1333 brelse(bh2);
1334 map->s_type_specific.s_sparing.
1335 s_spar_map[j] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336 }
1337 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001338 map->s_partition_func = udf_get_pblock_spar15;
Jan Karabfb257a2008-04-08 20:37:21 +02001339 } else if (!strncmp(upm2->partIdent.ident,
1340 UDF_ID_METADATA,
1341 strlen(UDF_ID_METADATA))) {
1342 struct udf_meta_data *mdata =
1343 &map->s_type_specific.s_metadata;
1344 struct metadataPartitionMap *mdm =
1345 (struct metadataPartitionMap *)
1346 &(lvd->partitionMaps[offset]);
1347 udf_debug("Parsing Logical vol part %d "
1348 "type %d id=%s\n", i, type,
1349 UDF_ID_METADATA);
1350
1351 map->s_partition_type = UDF_METADATA_MAP25;
1352 map->s_partition_func = udf_get_pblock_meta25;
1353
1354 mdata->s_meta_file_loc =
1355 le32_to_cpu(mdm->metadataFileLoc);
1356 mdata->s_mirror_file_loc =
1357 le32_to_cpu(mdm->metadataMirrorFileLoc);
1358 mdata->s_bitmap_file_loc =
1359 le32_to_cpu(mdm->metadataBitmapFileLoc);
1360 mdata->s_alloc_unit_size =
1361 le32_to_cpu(mdm->allocUnitSize);
1362 mdata->s_align_unit_size =
1363 le16_to_cpu(mdm->alignUnitSize);
1364 mdata->s_dup_md_flag =
1365 mdm->flags & 0x01;
1366
1367 udf_debug("Metadata Ident suffix=0x%x\n",
1368 (le16_to_cpu(
1369 ((__le16 *)
1370 mdm->partIdent.identSuffix)[0])));
1371 udf_debug("Metadata part num=%d\n",
1372 le16_to_cpu(mdm->partitionNum));
1373 udf_debug("Metadata part alloc unit size=%d\n",
1374 le32_to_cpu(mdm->allocUnitSize));
1375 udf_debug("Metadata file loc=%d\n",
1376 le32_to_cpu(mdm->metadataFileLoc));
1377 udf_debug("Mirror file loc=%d\n",
1378 le32_to_cpu(mdm->metadataMirrorFileLoc));
1379 udf_debug("Bitmap file loc=%d\n",
1380 le32_to_cpu(mdm->metadataBitmapFileLoc));
1381 udf_debug("Duplicate Flag: %d %d\n",
1382 mdata->s_dup_md_flag, mdm->flags);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001383 } else {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001384 udf_debug("Unknown ident: %s\n",
1385 upm2->partIdent.ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386 continue;
1387 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001388 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1389 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 }
1391 udf_debug("Partition (%d:%d) type %d on volume %d\n",
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001392 i, map->s_partition_num, type,
1393 map->s_volumeseqnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394 }
1395
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001396 if (fileset) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001397 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398
1399 *fileset = lelb_to_cpu(la->extLocation);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001400 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1401 "partition=%d\n", fileset->logicalBlockNum,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001402 fileset->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403 }
1404 if (lvd->integritySeqExt.extLength)
1405 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001406
Jan Karac0eb31e2008-04-01 16:50:35 +02001407out_bh:
1408 brelse(bh);
1409 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410}
1411
1412/*
1413 * udf_load_logicalvolint
1414 *
1415 */
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001416static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417{
1418 struct buffer_head *bh = NULL;
1419 uint16_t ident;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001420 struct udf_sb_info *sbi = UDF_SB(sb);
1421 struct logicalVolIntegrityDesc *lvid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422
1423 while (loc.extLength > 0 &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001424 (bh = udf_read_tagged(sb, loc.extLocation,
1425 loc.extLocation, &ident)) &&
1426 ident == TAG_IDENT_LVID) {
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001427 sbi->s_lvid_bh = bh;
1428 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001429
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001430 if (lvid->nextIntegrityExt.extLength)
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001431 udf_load_logicalvolint(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001432 leea_to_cpu(lvid->nextIntegrityExt));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001433
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001434 if (sbi->s_lvid_bh != bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001435 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436 loc.extLength -= sb->s_blocksize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001437 loc.extLocation++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001439 if (sbi->s_lvid_bh != bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001440 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441}
1442
1443/*
1444 * udf_process_sequence
1445 *
1446 * PURPOSE
1447 * Process a main/reserve volume descriptor sequence.
1448 *
1449 * PRE-CONDITIONS
1450 * sb Pointer to _locked_ superblock.
1451 * block First block of first extent of the sequence.
1452 * lastblock Lastblock of first extent of the sequence.
1453 *
1454 * HISTORY
1455 * July 1, 1997 - Andrew E. Mileski
1456 * Written, tested, and released.
1457 */
Jan Kara200a3592008-03-04 13:03:09 +01001458static noinline int udf_process_sequence(struct super_block *sb, long block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001459 long lastblock, struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460{
1461 struct buffer_head *bh = NULL;
1462 struct udf_vds_record vds[VDS_POS_LENGTH];
Marcin Slusarz4b111112008-02-08 04:20:36 -08001463 struct udf_vds_record *curr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464 struct generic_desc *gd;
1465 struct volDescPtr *vdp;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001466 int done = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467 uint32_t vdsn;
1468 uint16_t ident;
1469 long next_s = 0, next_e = 0;
1470
1471 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1472
Jan Karac0eb31e2008-04-01 16:50:35 +02001473 /*
1474 * Read the main descriptor sequence and find which descriptors
1475 * are in it.
1476 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001477 for (; (!done && block <= lastblock); block++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478
1479 bh = udf_read_tagged(sb, block, block, &ident);
Jan Karac0eb31e2008-04-01 16:50:35 +02001480 if (!bh) {
1481 printk(KERN_ERR "udf: Block %Lu of volume descriptor "
1482 "sequence is corrupted or we could not read "
1483 "it.\n", (unsigned long long)block);
1484 return 1;
1485 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486
1487 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1488 gd = (struct generic_desc *)bh->b_data;
1489 vdsn = le32_to_cpu(gd->volDescSeqNum);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001490 switch (ident) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001491 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001492 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1493 if (vdsn >= curr->volDescSeqNum) {
1494 curr->volDescSeqNum = vdsn;
1495 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001496 }
1497 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001498 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001499 curr = &vds[VDS_POS_VOL_DESC_PTR];
1500 if (vdsn >= curr->volDescSeqNum) {
1501 curr->volDescSeqNum = vdsn;
1502 curr->block = block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001504 vdp = (struct volDescPtr *)bh->b_data;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001505 next_s = le32_to_cpu(
1506 vdp->nextVolDescSeqExt.extLocation);
1507 next_e = le32_to_cpu(
1508 vdp->nextVolDescSeqExt.extLength);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001509 next_e = next_e >> sb->s_blocksize_bits;
1510 next_e += next_s;
1511 }
1512 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001513 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001514 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1515 if (vdsn >= curr->volDescSeqNum) {
1516 curr->volDescSeqNum = vdsn;
1517 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001518 }
1519 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001520 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001521 curr = &vds[VDS_POS_PARTITION_DESC];
1522 if (!curr->block)
1523 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001524 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001525 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001526 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1527 if (vdsn >= curr->volDescSeqNum) {
1528 curr->volDescSeqNum = vdsn;
1529 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001530 }
1531 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001532 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001533 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1534 if (vdsn >= curr->volDescSeqNum) {
1535 curr->volDescSeqNum = vdsn;
1536 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001537 }
1538 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001539 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001540 vds[VDS_POS_TERMINATING_DESC].block = block;
1541 if (next_e) {
1542 block = next_s;
1543 lastblock = next_e;
1544 next_s = next_e = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001545 } else
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001546 done = 1;
1547 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07001549 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550 }
Jan Karac0eb31e2008-04-01 16:50:35 +02001551 /*
1552 * Now read interesting descriptors again and process them
1553 * in a suitable order
1554 */
1555 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1556 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n");
1557 return 1;
1558 }
1559 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1560 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561
Jan Karac0eb31e2008-04-01 16:50:35 +02001562 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1563 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1564 return 1;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001565
Jan Karac0eb31e2008-04-01 16:50:35 +02001566 if (vds[VDS_POS_PARTITION_DESC].block) {
1567 /*
1568 * We rescan the whole descriptor sequence to find
1569 * partition descriptor blocks and process them.
1570 */
1571 for (block = vds[VDS_POS_PARTITION_DESC].block;
1572 block < vds[VDS_POS_TERMINATING_DESC].block;
1573 block++)
1574 if (udf_load_partdesc(sb, block))
Marcin Slusarz165923f2008-02-10 11:33:08 +01001575 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576 }
1577
1578 return 0;
1579}
1580
Jan Kara40346002009-03-19 16:21:38 +01001581static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1582 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583{
Jan Kara40346002009-03-19 16:21:38 +01001584 struct anchorVolDescPtr *anchor;
1585 long main_s, main_e, reserve_s, reserve_e;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586
Jan Kara40346002009-03-19 16:21:38 +01001587 anchor = (struct anchorVolDescPtr *)bh->b_data;
1588
1589 /* Locate the main sequence */
1590 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1591 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1592 main_e = main_e >> sb->s_blocksize_bits;
1593 main_e += main_s;
1594
1595 /* Locate the reserve sequence */
1596 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1597 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1598 reserve_e = reserve_e >> sb->s_blocksize_bits;
1599 reserve_e += reserve_s;
1600
1601 /* Process the main & reserve sequences */
1602 /* responsible for finding the PartitionDesc(s) */
1603 if (!udf_process_sequence(sb, main_s, main_e, fileset))
1604 return 1;
1605 return !udf_process_sequence(sb, reserve_s, reserve_e, fileset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606}
1607
Jan Kara40346002009-03-19 16:21:38 +01001608/*
1609 * Check whether there is an anchor block in the given block and
1610 * load Volume Descriptor Sequence if so.
1611 */
1612static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1613 struct kernel_lb_addr *fileset)
1614{
1615 struct buffer_head *bh;
1616 uint16_t ident;
1617 int ret;
1618
1619 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1620 udf_fixed_to_variable(block) >=
1621 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1622 return 0;
1623
1624 bh = udf_read_tagged(sb, block, block, &ident);
1625 if (!bh)
1626 return 0;
1627 if (ident != TAG_IDENT_AVDP) {
1628 brelse(bh);
1629 return 0;
1630 }
1631 ret = udf_load_sequence(sb, bh, fileset);
1632 brelse(bh);
1633 return ret;
1634}
1635
1636/* Search for an anchor volume descriptor pointer */
1637static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
1638 struct kernel_lb_addr *fileset)
1639{
1640 sector_t last[6];
1641 int i;
1642 struct udf_sb_info *sbi = UDF_SB(sb);
1643 int last_count = 0;
1644
1645 /* First try user provided anchor */
1646 if (sbi->s_anchor) {
1647 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
1648 return lastblock;
1649 }
1650 /*
1651 * according to spec, anchor is in either:
1652 * block 256
1653 * lastblock-256
1654 * lastblock
1655 * however, if the disc isn't closed, it could be 512.
1656 */
1657 if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
1658 return lastblock;
1659 /*
1660 * The trouble is which block is the last one. Drives often misreport
1661 * this so we try various possibilities.
1662 */
1663 last[last_count++] = lastblock;
1664 if (lastblock >= 1)
1665 last[last_count++] = lastblock - 1;
1666 last[last_count++] = lastblock + 1;
1667 if (lastblock >= 2)
1668 last[last_count++] = lastblock - 2;
1669 if (lastblock >= 150)
1670 last[last_count++] = lastblock - 150;
1671 if (lastblock >= 152)
1672 last[last_count++] = lastblock - 152;
1673
1674 for (i = 0; i < last_count; i++) {
1675 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1676 sb->s_blocksize_bits)
1677 continue;
1678 if (udf_check_anchor_block(sb, last[i], fileset))
1679 return last[i];
1680 if (last[i] < 256)
1681 continue;
1682 if (udf_check_anchor_block(sb, last[i] - 256, fileset))
1683 return last[i];
1684 }
1685
1686 /* Finally try block 512 in case media is open */
1687 if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
1688 return last[0];
1689 return 0;
1690}
1691
1692/*
1693 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1694 * area specified by it. The function expects sbi->s_lastblock to be the last
1695 * block on the media.
1696 *
1697 * Return 1 if ok, 0 if not found.
1698 *
1699 */
1700static int udf_find_anchor(struct super_block *sb,
1701 struct kernel_lb_addr *fileset)
1702{
1703 sector_t lastblock;
1704 struct udf_sb_info *sbi = UDF_SB(sb);
1705
1706 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1707 if (lastblock)
1708 goto out;
1709
1710 /* No anchor found? Try VARCONV conversion of block numbers */
1711 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1712 /* Firstly, we try to not convert number of the last block */
1713 lastblock = udf_scan_anchors(sb,
1714 udf_variable_to_fixed(sbi->s_last_block),
1715 fileset);
1716 if (lastblock)
1717 goto out;
1718
1719 /* Secondly, we try with converted number of the last block */
1720 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1721 if (!lastblock) {
1722 /* VARCONV didn't help. Clear it. */
1723 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1724 return 0;
1725 }
1726out:
1727 sbi->s_last_block = lastblock;
1728 return 1;
1729}
1730
1731/*
1732 * Check Volume Structure Descriptor, find Anchor block and load Volume
1733 * Descriptor Sequence
1734 */
1735static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1736 int silent, struct kernel_lb_addr *fileset)
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001737{
1738 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Kara40346002009-03-19 16:21:38 +01001739 loff_t nsr_off;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001740
1741 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1742 if (!silent)
1743 printk(KERN_WARNING "UDF-fs: Bad block size\n");
1744 return 0;
1745 }
1746 sbi->s_last_block = uopt->lastblock;
Jan Kara40346002009-03-19 16:21:38 +01001747 if (!uopt->novrs) {
1748 /* Check that it is NSR02 compliant */
1749 nsr_off = udf_check_vsd(sb);
1750 if (!nsr_off) {
1751 if (!silent)
1752 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1753 return 0;
1754 }
1755 if (nsr_off == -1)
1756 udf_debug("Failed to read byte 32768. Assuming open "
1757 "disc. Skipping validity check\n");
1758 if (!sbi->s_last_block)
1759 sbi->s_last_block = udf_get_last_block(sb);
1760 } else {
1761 udf_debug("Validity check skipped because of novrs option\n");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001762 }
Jan Kara40346002009-03-19 16:21:38 +01001763
1764 /* Look for anchor block and load Volume Descriptor Sequence */
1765 sbi->s_anchor = uopt->anchor;
1766 if (!udf_find_anchor(sb, fileset)) {
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001767 if (!silent)
1768 printk(KERN_WARNING "UDF-fs: No anchor found\n");
1769 return 0;
1770 }
1771 return 1;
1772}
1773
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774static void udf_open_lvid(struct super_block *sb)
1775{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001776 struct udf_sb_info *sbi = UDF_SB(sb);
1777 struct buffer_head *bh = sbi->s_lvid_bh;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001778 struct logicalVolIntegrityDesc *lvid;
1779 struct logicalVolIntegrityDescImpUse *lvidiu;
Jan Kara146bca72009-03-16 18:27:37 +01001780
Marcin Slusarz165923f2008-02-10 11:33:08 +01001781 if (!bh)
1782 return;
Jan Kara949f4a72010-10-20 18:49:20 +02001783
1784 mutex_lock(&sbi->s_alloc_mutex);
Marcin Slusarz165923f2008-02-10 11:33:08 +01001785 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1786 lvidiu = udf_sb_lvidiu(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787
Marcin Slusarz165923f2008-02-10 11:33:08 +01001788 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1789 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1790 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1791 CURRENT_TIME);
Jan Kara146bca72009-03-16 18:27:37 +01001792 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793
Marcin Slusarz165923f2008-02-10 11:33:08 +01001794 lvid->descTag.descCRC = cpu_to_le16(
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001795 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001796 le16_to_cpu(lvid->descTag.descCRCLength)));
Marcin Slusarz165923f2008-02-10 11:33:08 +01001797
1798 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1799 mark_buffer_dirty(bh);
Jan Kara146bca72009-03-16 18:27:37 +01001800 sbi->s_lvid_dirty = 0;
Jan Kara949f4a72010-10-20 18:49:20 +02001801 mutex_unlock(&sbi->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001802}
1803
1804static void udf_close_lvid(struct super_block *sb)
1805{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001806 struct udf_sb_info *sbi = UDF_SB(sb);
1807 struct buffer_head *bh = sbi->s_lvid_bh;
1808 struct logicalVolIntegrityDesc *lvid;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001809 struct logicalVolIntegrityDescImpUse *lvidiu;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001810
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001811 if (!bh)
1812 return;
1813
Jan Kara949f4a72010-10-20 18:49:20 +02001814 mutex_lock(&sbi->s_alloc_mutex);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001815 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001816 lvidiu = udf_sb_lvidiu(sbi);
1817 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1818 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1819 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1820 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1821 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1822 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1823 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1824 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1825 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1826 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001827
Marcin Slusarz165923f2008-02-10 11:33:08 +01001828 lvid->descTag.descCRC = cpu_to_le16(
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001829 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001830 le16_to_cpu(lvid->descTag.descCRCLength)));
Marcin Slusarz165923f2008-02-10 11:33:08 +01001831
1832 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
Jan Kara1357ed02011-12-23 11:53:07 +01001833 /*
1834 * We set buffer uptodate unconditionally here to avoid spurious
1835 * warnings from mark_buffer_dirty() when previous EIO has marked
1836 * the buffer as !uptodate
1837 */
1838 set_buffer_uptodate(bh);
Marcin Slusarz165923f2008-02-10 11:33:08 +01001839 mark_buffer_dirty(bh);
Jan Kara146bca72009-03-16 18:27:37 +01001840 sbi->s_lvid_dirty = 0;
Jan Kara949f4a72010-10-20 18:49:20 +02001841 mutex_unlock(&sbi->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842}
1843
Jan Karad664b6a2010-10-20 18:28:46 +02001844u64 lvid_get_unique_id(struct super_block *sb)
1845{
1846 struct buffer_head *bh;
1847 struct udf_sb_info *sbi = UDF_SB(sb);
1848 struct logicalVolIntegrityDesc *lvid;
1849 struct logicalVolHeaderDesc *lvhd;
1850 u64 uniqueID;
1851 u64 ret;
1852
1853 bh = sbi->s_lvid_bh;
1854 if (!bh)
1855 return 0;
1856
1857 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1858 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
1859
1860 mutex_lock(&sbi->s_alloc_mutex);
1861 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
1862 if (!(++uniqueID & 0xFFFFFFFF))
1863 uniqueID += 16;
1864 lvhd->uniqueID = cpu_to_le64(uniqueID);
1865 mutex_unlock(&sbi->s_alloc_mutex);
1866 mark_buffer_dirty(bh);
1867
1868 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001869}
1870
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001871static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1872{
1873 int i;
1874 int nr_groups = bitmap->s_nr_groups;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001875 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1876 nr_groups);
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001877
1878 for (i = 0; i < nr_groups; i++)
1879 if (bitmap->s_block_bitmap[i])
1880 brelse(bitmap->s_block_bitmap[i]);
1881
1882 if (size <= PAGE_SIZE)
1883 kfree(bitmap);
1884 else
1885 vfree(bitmap);
1886}
1887
Jan Kara2e0838f2008-04-01 18:08:51 +02001888static void udf_free_partition(struct udf_part_map *map)
1889{
1890 int i;
Jan Karabfb257a2008-04-08 20:37:21 +02001891 struct udf_meta_data *mdata;
Jan Kara2e0838f2008-04-01 18:08:51 +02001892
1893 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1894 iput(map->s_uspace.s_table);
1895 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1896 iput(map->s_fspace.s_table);
1897 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1898 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1899 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1900 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1901 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1902 for (i = 0; i < 4; i++)
1903 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
Jan Karabfb257a2008-04-08 20:37:21 +02001904 else if (map->s_partition_type == UDF_METADATA_MAP25) {
1905 mdata = &map->s_type_specific.s_metadata;
1906 iput(mdata->s_metadata_fe);
1907 mdata->s_metadata_fe = NULL;
1908
1909 iput(mdata->s_mirror_fe);
1910 mdata->s_mirror_fe = NULL;
1911
1912 iput(mdata->s_bitmap_fe);
1913 mdata->s_bitmap_fe = NULL;
1914 }
Jan Kara2e0838f2008-04-01 18:08:51 +02001915}
1916
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917static int udf_fill_super(struct super_block *sb, void *options, int silent)
1918{
1919 int i;
Jan Kara40346002009-03-19 16:21:38 +01001920 int ret;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001921 struct inode *inode = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922 struct udf_options uopt;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001923 struct kernel_lb_addr rootdir, fileset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924 struct udf_sb_info *sbi;
1925
1926 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1927 uopt.uid = -1;
1928 uopt.gid = -1;
1929 uopt.umask = 0;
Marcin Slusarz87bc7302008-12-02 13:40:11 +01001930 uopt.fmode = UDF_INVALID_MODE;
1931 uopt.dmode = UDF_INVALID_MODE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001933 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
Alessio Igor Bogani9db9f9e2010-11-16 18:40:49 +01001934 if (!sbi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001935 return -ENOMEM;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001936
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937 sb->s_fs_info = sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938
Ingo Molnar1e7933d2006-03-23 03:00:44 -08001939 mutex_init(&sbi->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001940
Miklos Szeredi6da80892008-02-08 04:21:50 -08001941 if (!udf_parse_options((char *)options, &uopt, false))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001942 goto error_out;
1943
1944 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001945 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946 udf_error(sb, "udf_read_super",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001947 "utf8 cannot be combined with iocharset\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001948 goto error_out;
1949 }
1950#ifdef CONFIG_UDF_NLS
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001951 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952 uopt.nls_map = load_nls_default();
1953 if (!uopt.nls_map)
1954 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1955 else
1956 udf_debug("Using default NLS map\n");
1957 }
1958#endif
1959 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1960 uopt.flags |= (1 << UDF_FLAG_UTF8);
1961
1962 fileset.logicalBlockNum = 0xFFFFFFFF;
1963 fileset.partitionReferenceNum = 0xFFFF;
1964
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001965 sbi->s_flags = uopt.flags;
1966 sbi->s_uid = uopt.uid;
1967 sbi->s_gid = uopt.gid;
1968 sbi->s_umask = uopt.umask;
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +01001969 sbi->s_fmode = uopt.fmode;
1970 sbi->s_dmode = uopt.dmode;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001971 sbi->s_nls_map = uopt.nls_map;
Jan Karac03cad22010-10-20 22:17:28 +02001972 rwlock_init(&sbi->s_cred_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001974 if (uopt.session == 0xFFFFFFFF)
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001975 sbi->s_session = udf_get_last_session(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976 else
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001977 sbi->s_session = uopt.session;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001979 udf_debug("Multi-session=%d\n", sbi->s_session);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980
Linus Torvalds1da177e2005-04-16 15:20:36 -07001981 /* Fill in the rest of the superblock */
1982 sb->s_op = &udf_sb_ops;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001983 sb->s_export_op = &udf_export_ops;
Christoph Hellwig123e9ca2010-05-19 07:16:44 -04001984
Linus Torvalds1da177e2005-04-16 15:20:36 -07001985 sb->s_dirt = 0;
1986 sb->s_magic = UDF_SUPER_MAGIC;
1987 sb->s_time_gran = 1000;
1988
Jan Kara40346002009-03-19 16:21:38 +01001989 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
1990 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1991 } else {
Martin K. Petersene1defc42009-05-22 17:17:49 -04001992 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
Jan Kara40346002009-03-19 16:21:38 +01001993 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1994 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1995 if (!silent)
1996 printk(KERN_NOTICE
1997 "UDF-fs: Rescanning with blocksize "
1998 "%d\n", UDF_DEFAULT_BLOCKSIZE);
1999 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
2000 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2001 }
2002 }
2003 if (!ret) {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002004 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005 goto error_out;
2006 }
2007
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002008 udf_debug("Lastblock=%d\n", sbi->s_last_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002010 if (sbi->s_lvid_bh) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002011 struct logicalVolIntegrityDescImpUse *lvidiu =
2012 udf_sb_lvidiu(sbi);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002013 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2014 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
Marcin Slusarz4b111112008-02-08 04:20:36 -08002015 /* uint16_t maxUDFWriteRev =
2016 le16_to_cpu(lvidiu->maxUDFWriteRev); */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002018 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002019 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
2020 "(max is %x)\n",
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002021 le16_to_cpu(lvidiu->minUDFReadRev),
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002022 UDF_MAX_READ_VERSION);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023 goto error_out;
Marcin Slusarz4b111112008-02-08 04:20:36 -08002024 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002025 sb->s_flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002027 sbi->s_udfrev = minUDFWriteRev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002028
2029 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2030 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2031 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2032 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2033 }
2034
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002035 if (!sbi->s_partitions) {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002036 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002037 goto error_out;
2038 }
2039
Marcin Slusarz4b111112008-02-08 04:20:36 -08002040 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
2041 UDF_PART_FLAG_READ_ONLY) {
2042 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
2043 "forcing readonly mount\n");
Eric Sandeen39b3f6d2006-09-29 01:59:41 -07002044 sb->s_flags |= MS_RDONLY;
Peter Osterlundc1a26e72006-10-05 21:17:50 +02002045 }
Eric Sandeen39b3f6d2006-09-29 01:59:41 -07002046
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002047 if (udf_find_fileset(sb, &fileset, &rootdir)) {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002048 printk(KERN_WARNING "UDF-fs: No fileset found\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049 goto error_out;
2050 }
2051
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002052 if (!silent) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002053 struct timestamp ts;
Marcin Slusarz56774802008-02-10 11:25:31 +01002054 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
Adrian Bunka9ca6632008-02-08 04:20:47 -08002055 udf_info("UDF: Mounting volume '%s', "
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002056 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
Marcin Slusarz56774802008-02-10 11:25:31 +01002057 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
2058 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002059 }
2060 if (!(sb->s_flags & MS_RDONLY))
2061 udf_open_lvid(sb);
2062
2063 /* Assign the root inode */
2064 /* assign inodes by physical block number */
2065 /* perhaps it's not extensible enough, but for now ... */
Pekka Enberg97e961f2008-10-15 12:29:03 +02002066 inode = udf_iget(sb, &rootdir);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002067 if (!inode) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002068 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
2069 "partition=%d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002070 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002071 goto error_out;
2072 }
2073
2074 /* Allocate a dentry for the root inode */
2075 sb->s_root = d_alloc_root(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002076 if (!sb->s_root) {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002077 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002078 iput(inode);
2079 goto error_out;
2080 }
Jan Kara31170b62007-05-08 00:35:21 -07002081 sb->s_maxbytes = MAX_LFS_FILESIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082 return 0;
2083
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002084error_out:
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002085 if (sbi->s_vat_inode)
2086 iput(sbi->s_vat_inode);
Jan Kara2e0838f2008-04-01 18:08:51 +02002087 if (sbi->s_partitions)
2088 for (i = 0; i < sbi->s_partitions; i++)
2089 udf_free_partition(&sbi->s_partmaps[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090#ifdef CONFIG_UDF_NLS
2091 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002092 unload_nls(sbi->s_nls_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093#endif
2094 if (!(sb->s_flags & MS_RDONLY))
2095 udf_close_lvid(sb);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002096 brelse(sbi->s_lvid_bh);
2097
2098 kfree(sbi->s_partmaps);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099 kfree(sbi);
2100 sb->s_fs_info = NULL;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002101
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102 return -EINVAL;
2103}
2104
Adrian Bunkb8145a72008-02-17 10:19:55 +02002105static void udf_error(struct super_block *sb, const char *function,
2106 const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002107{
2108 va_list args;
2109
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002110 if (!(sb->s_flags & MS_RDONLY)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111 /* mark sb error */
2112 sb->s_dirt = 1;
2113 }
2114 va_start(args, fmt);
Alexey Dobriyan4a6e6172006-12-06 20:37:04 -08002115 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116 va_end(args);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002117 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002118 sb->s_id, function, error_buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119}
2120
2121void udf_warning(struct super_block *sb, const char *function,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002122 const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123{
2124 va_list args;
2125
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002126 va_start(args, fmt);
Alexey Dobriyan4a6e6172006-12-06 20:37:04 -08002127 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128 va_end(args);
2129 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002130 sb->s_id, function, error_buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002131}
2132
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002133static void udf_put_super(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002134{
2135 int i;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002136 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002138 sbi = UDF_SB(sb);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +02002139
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002140 if (sbi->s_vat_inode)
2141 iput(sbi->s_vat_inode);
Jan Kara2e0838f2008-04-01 18:08:51 +02002142 if (sbi->s_partitions)
2143 for (i = 0; i < sbi->s_partitions; i++)
2144 udf_free_partition(&sbi->s_partmaps[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145#ifdef CONFIG_UDF_NLS
2146 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002147 unload_nls(sbi->s_nls_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148#endif
2149 if (!(sb->s_flags & MS_RDONLY))
2150 udf_close_lvid(sb);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002151 brelse(sbi->s_lvid_bh);
2152 kfree(sbi->s_partmaps);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002153 kfree(sb->s_fs_info);
2154 sb->s_fs_info = NULL;
2155}
2156
Jan Kara146bca72009-03-16 18:27:37 +01002157static int udf_sync_fs(struct super_block *sb, int wait)
2158{
2159 struct udf_sb_info *sbi = UDF_SB(sb);
2160
2161 mutex_lock(&sbi->s_alloc_mutex);
2162 if (sbi->s_lvid_dirty) {
2163 /*
2164 * Blockdevice will be synced later so we don't have to submit
2165 * the buffer for IO
2166 */
2167 mark_buffer_dirty(sbi->s_lvid_bh);
2168 sb->s_dirt = 0;
2169 sbi->s_lvid_dirty = 0;
2170 }
2171 mutex_unlock(&sbi->s_alloc_mutex);
2172
2173 return 0;
2174}
2175
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002176static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002177{
David Howells726c3342006-06-23 02:02:58 -07002178 struct super_block *sb = dentry->d_sb;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002179 struct udf_sb_info *sbi = UDF_SB(sb);
2180 struct logicalVolIntegrityDescImpUse *lvidiu;
Coly Li557f5a12009-01-20 01:36:55 +08002181 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002182
2183 if (sbi->s_lvid_bh != NULL)
2184 lvidiu = udf_sb_lvidiu(sbi);
2185 else
2186 lvidiu = NULL;
David Howells726c3342006-06-23 02:02:58 -07002187
Linus Torvalds1da177e2005-04-16 15:20:36 -07002188 buf->f_type = UDF_SUPER_MAGIC;
2189 buf->f_bsize = sb->s_blocksize;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002190 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002191 buf->f_bfree = udf_count_free(sb);
2192 buf->f_bavail = buf->f_bfree;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002193 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2194 le32_to_cpu(lvidiu->numDirs)) : 0)
2195 + buf->f_bfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002196 buf->f_ffree = buf->f_bfree;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002197 buf->f_namelen = UDF_NAME_LEN - 2;
Coly Li557f5a12009-01-20 01:36:55 +08002198 buf->f_fsid.val[0] = (u32)id;
2199 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002200
2201 return 0;
2202}
2203
Marcin Slusarz4b111112008-02-08 04:20:36 -08002204static unsigned int udf_count_free_bitmap(struct super_block *sb,
2205 struct udf_bitmap *bitmap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206{
2207 struct buffer_head *bh = NULL;
2208 unsigned int accum = 0;
2209 int index;
2210 int block = 0, newblock;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002211 struct kernel_lb_addr loc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002212 uint32_t bytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002213 uint8_t *ptr;
2214 uint16_t ident;
2215 struct spaceBitmapDesc *bm;
2216
Linus Torvalds1da177e2005-04-16 15:20:36 -07002217 loc.logicalBlockNum = bitmap->s_extPosition;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002218 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
Pekka Enberg97e961f2008-10-15 12:29:03 +02002219 bh = udf_read_ptagged(sb, &loc, 0, &ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002221 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002222 printk(KERN_ERR "udf: udf_count_free failed\n");
2223 goto out;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002224 } else if (ident != TAG_IDENT_SBD) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002225 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002226 printk(KERN_ERR "udf: udf_count_free failed\n");
2227 goto out;
2228 }
2229
2230 bm = (struct spaceBitmapDesc *)bh->b_data;
2231 bytes = le32_to_cpu(bm->numOfBytes);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002232 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2233 ptr = (uint8_t *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002235 while (bytes > 0) {
Marcin Slusarz01b954a2008-02-02 22:37:07 +01002236 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2237 accum += bitmap_weight((const unsigned long *)(ptr + index),
2238 cur_bytes * 8);
2239 bytes -= cur_bytes;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002240 if (bytes) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002241 brelse(bh);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002242 newblock = udf_get_lb_pblock(sb, &loc, ++block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243 bh = udf_tread(sb, newblock);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002244 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002245 udf_debug("read failed\n");
2246 goto out;
2247 }
2248 index = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002249 ptr = (uint8_t *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002250 }
2251 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07002252 brelse(bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002253out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254 return accum;
2255}
2256
Marcin Slusarz4b111112008-02-08 04:20:36 -08002257static unsigned int udf_count_free_table(struct super_block *sb,
2258 struct inode *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002259{
2260 unsigned int accum = 0;
Jan Karaff116fc2007-05-08 00:35:14 -07002261 uint32_t elen;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002262 struct kernel_lb_addr eloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002263 int8_t etype;
Jan Karaff116fc2007-05-08 00:35:14 -07002264 struct extent_position epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002265
Jan Karad1668fe2010-10-20 23:24:12 +02002266 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
Marcin Slusarzc0b34432008-02-08 04:20:42 -08002267 epos.block = UDF_I(table)->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -07002268 epos.offset = sizeof(struct unallocSpaceEntry);
2269 epos.bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002270
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002271 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002272 accum += (elen >> table->i_sb->s_blocksize_bits);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002273
Jan Kara3bf25cb2007-05-08 00:35:16 -07002274 brelse(epos.bh);
Jan Karad1668fe2010-10-20 23:24:12 +02002275 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002276
2277 return accum;
2278}
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002279
2280static unsigned int udf_count_free(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281{
2282 unsigned int accum = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002283 struct udf_sb_info *sbi;
2284 struct udf_part_map *map;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002286 sbi = UDF_SB(sb);
2287 if (sbi->s_lvid_bh) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002288 struct logicalVolIntegrityDesc *lvid =
2289 (struct logicalVolIntegrityDesc *)
2290 sbi->s_lvid_bh->b_data;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002291 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002292 accum = le32_to_cpu(
2293 lvid->freeSpaceTable[sbi->s_partition]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002294 if (accum == 0xFFFFFFFF)
2295 accum = 0;
2296 }
2297 }
2298
2299 if (accum)
2300 return accum;
2301
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002302 map = &sbi->s_partmaps[sbi->s_partition];
2303 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002304 accum += udf_count_free_bitmap(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002305 map->s_uspace.s_bitmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002306 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002307 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002308 accum += udf_count_free_bitmap(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002309 map->s_fspace.s_bitmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002310 }
2311 if (accum)
2312 return accum;
2313
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002314 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002315 accum += udf_count_free_table(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002316 map->s_uspace.s_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002317 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002318 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002319 accum += udf_count_free_table(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002320 map->s_fspace.s_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002321 }
2322
2323 return accum;
2324}