blob: 91219385691d8f80d1db9aed3973183bb931a48d [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>
Jan Kara1df2ae32012-06-27 21:23:07 +020059#include <linux/log2.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#include <asm/byteorder.h>
61
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#include "udf_sb.h"
63#include "udf_i.h"
64
65#include <linux/init.h>
66#include <asm/uaccess.h>
67
68#define VDS_POS_PRIMARY_VOL_DESC 0
69#define VDS_POS_UNALLOC_SPACE_DESC 1
70#define VDS_POS_LOGICAL_VOL_DESC 2
71#define VDS_POS_PARTITION_DESC 3
72#define VDS_POS_IMP_USE_VOL_DESC 4
73#define VDS_POS_VOL_DESC_PTR 5
74#define VDS_POS_TERMINATING_DESC 6
75#define VDS_POS_LENGTH 7
76
Miklos Szeredi6da80892008-02-08 04:21:50 -080077#define UDF_DEFAULT_BLOCKSIZE 2048
78
Al Viro8de52772012-02-06 12:45:27 -050079enum { UDF_MAX_LINKS = 0xffff };
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081/* These are the "meat" - everything else is stuffing */
82static int udf_fill_super(struct super_block *, void *, int);
83static void udf_put_super(struct super_block *);
Jan Kara146bca72009-03-16 18:27:37 +010084static int udf_sync_fs(struct super_block *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085static int udf_remount_fs(struct super_block *, int *, char *);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020086static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020087static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
88 struct kernel_lb_addr *);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070089static void udf_load_fileset(struct super_block *, struct buffer_head *,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020090 struct kernel_lb_addr *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091static void udf_open_lvid(struct super_block *);
92static void udf_close_lvid(struct super_block *);
93static unsigned int udf_count_free(struct super_block *);
David Howells726c3342006-06-23 02:02:58 -070094static int udf_statfs(struct dentry *, struct kstatfs *);
Al Viro34c80b12011-12-08 21:32:45 -050095static int udf_show_options(struct seq_file *, struct dentry *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Jan Kara69d75672013-09-12 22:00:15 +020097struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
Marcin Slusarz6c79e982008-02-08 04:20:30 -080098{
Jan Kara69d75672013-09-12 22:00:15 +020099 struct logicalVolIntegrityDesc *lvid;
100 unsigned int partnum;
101 unsigned int offset;
102
103 if (!UDF_SB(sb)->s_lvid_bh)
104 return NULL;
105 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
106 partnum = le32_to_cpu(lvid->numOfPartitions);
107 if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
108 offsetof(struct logicalVolIntegrityDesc, impUse)) /
109 (2 * sizeof(uint32_t)) < partnum) {
110 udf_err(sb, "Logical volume integrity descriptor corrupted "
111 "(numOfPartitions = %u)!\n", partnum);
112 return NULL;
113 }
114 /* The offset is to skip freeSpaceTable and sizeTable arrays */
115 offset = partnum * 2 * sizeof(uint32_t);
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800116 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
117}
118
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119/* UDF filesystem type */
Al Viro152a0832010-07-25 00:46:55 +0400120static struct dentry *udf_mount(struct file_system_type *fs_type,
121 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122{
Al Viro152a0832010-07-25 00:46:55 +0400123 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124}
125
126static struct file_system_type udf_fstype = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700127 .owner = THIS_MODULE,
128 .name = "udf",
Al Viro152a0832010-07-25 00:46:55 +0400129 .mount = udf_mount,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700130 .kill_sb = kill_block_super,
131 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132};
Eric W. Biederman3e64fe52013-03-11 07:05:42 -0700133MODULE_ALIAS_FS("udf");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700135static struct kmem_cache *udf_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
137static struct inode *udf_alloc_inode(struct super_block *sb)
138{
139 struct udf_inode_info *ei;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800140 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 if (!ei)
142 return NULL;
Dan Bastone95f87972006-08-13 23:24:18 -0700143
144 ei->i_unique = 0;
145 ei->i_lenExtents = 0;
146 ei->i_next_alloc_block = 0;
147 ei->i_next_alloc_goal = 0;
148 ei->i_strat4096 = 0;
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100149 init_rwsem(&ei->i_data_sem);
Namjae Jeon99600052013-01-19 11:17:14 +0900150 ei->cached_extent.lstart = -1;
151 spin_lock_init(&ei->i_extent_cache_lock);
Dan Bastone95f87972006-08-13 23:24:18 -0700152
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 return &ei->vfs_inode;
154}
155
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100156static void udf_i_callback(struct rcu_head *head)
157{
158 struct inode *inode = container_of(head, struct inode, i_rcu);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100159 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
160}
161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162static void udf_destroy_inode(struct inode *inode)
163{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100164 call_rcu(&inode->i_rcu, udf_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165}
166
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700167static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700169 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
Christoph Lametera35afb82007-05-16 22:10:57 -0700171 ei->i_ext.i_data = NULL;
172 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173}
174
175static int init_inodecache(void)
176{
177 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
178 sizeof(struct udf_inode_info),
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700179 0, (SLAB_RECLAIM_ACCOUNT |
180 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900181 init_once);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700182 if (!udf_inode_cachep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 return -ENOMEM;
184 return 0;
185}
186
187static void destroy_inodecache(void)
188{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +1000189 /*
190 * Make sure all delayed rcu free inodes are flushed before we
191 * destroy cache.
192 */
193 rcu_barrier();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700194 kmem_cache_destroy(udf_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195}
196
197/* Superblock operations */
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800198static const struct super_operations udf_sb_ops = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700199 .alloc_inode = udf_alloc_inode,
200 .destroy_inode = udf_destroy_inode,
201 .write_inode = udf_write_inode,
Al Viro3aac2b622010-06-07 00:43:39 -0400202 .evict_inode = udf_evict_inode,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700203 .put_super = udf_put_super,
Jan Kara146bca72009-03-16 18:27:37 +0100204 .sync_fs = udf_sync_fs,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700205 .statfs = udf_statfs,
206 .remount_fs = udf_remount_fs,
Miklos Szeredi6da80892008-02-08 04:21:50 -0800207 .show_options = udf_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208};
209
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700210struct udf_options {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 unsigned char novrs;
212 unsigned int blocksize;
213 unsigned int session;
214 unsigned int lastblock;
215 unsigned int anchor;
216 unsigned int volume;
217 unsigned short partition;
218 unsigned int fileset;
219 unsigned int rootdir;
220 unsigned int flags;
Al Virofaa17292011-07-26 03:18:29 -0400221 umode_t umask;
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -0800222 kgid_t gid;
223 kuid_t uid;
Al Virofaa17292011-07-26 03:18:29 -0400224 umode_t fmode;
225 umode_t dmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 struct nls_table *nls_map;
227};
228
229static int __init init_udf_fs(void)
230{
231 int err;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700232
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 err = init_inodecache();
234 if (err)
235 goto out1;
236 err = register_filesystem(&udf_fstype);
237 if (err)
238 goto out;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 return 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700241
242out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 destroy_inodecache();
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700244
245out1:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 return err;
247}
248
249static void __exit exit_udf_fs(void)
250{
251 unregister_filesystem(&udf_fstype);
252 destroy_inodecache();
253}
254
255module_init(init_udf_fs)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700256module_exit(exit_udf_fs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -0800258static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
259{
260 struct udf_sb_info *sbi = UDF_SB(sb);
261
262 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
263 GFP_KERNEL);
264 if (!sbi->s_partmaps) {
Joe Perches8076c362011-10-10 01:08:03 -0700265 udf_err(sb, "Unable to allocate space for %d partition maps\n",
266 count);
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -0800267 sbi->s_partitions = 0;
268 return -ENOMEM;
269 }
270
271 sbi->s_partitions = count;
272 return 0;
273}
274
Jan Karabff943a2012-06-27 22:27:05 +0200275static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
276{
277 int i;
278 int nr_groups = bitmap->s_nr_groups;
279 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
280 nr_groups);
281
282 for (i = 0; i < nr_groups; i++)
283 if (bitmap->s_block_bitmap[i])
284 brelse(bitmap->s_block_bitmap[i]);
285
286 if (size <= PAGE_SIZE)
287 kfree(bitmap);
288 else
289 vfree(bitmap);
290}
291
292static void udf_free_partition(struct udf_part_map *map)
293{
294 int i;
295 struct udf_meta_data *mdata;
296
297 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
298 iput(map->s_uspace.s_table);
299 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
300 iput(map->s_fspace.s_table);
301 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
302 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
303 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
304 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
305 if (map->s_partition_type == UDF_SPARABLE_MAP15)
306 for (i = 0; i < 4; i++)
307 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
308 else if (map->s_partition_type == UDF_METADATA_MAP25) {
309 mdata = &map->s_type_specific.s_metadata;
310 iput(mdata->s_metadata_fe);
311 mdata->s_metadata_fe = NULL;
312
313 iput(mdata->s_mirror_fe);
314 mdata->s_mirror_fe = NULL;
315
316 iput(mdata->s_bitmap_fe);
317 mdata->s_bitmap_fe = NULL;
318 }
319}
320
321static void udf_sb_free_partitions(struct super_block *sb)
322{
323 struct udf_sb_info *sbi = UDF_SB(sb);
324 int i;
Namjae Jeon1b1baff2013-01-14 22:53:47 +0100325 if (sbi->s_partmaps == NULL)
326 return;
Jan Karabff943a2012-06-27 22:27:05 +0200327 for (i = 0; i < sbi->s_partitions; i++)
328 udf_free_partition(&sbi->s_partmaps[i]);
329 kfree(sbi->s_partmaps);
330 sbi->s_partmaps = NULL;
331}
332
Al Viro34c80b12011-12-08 21:32:45 -0500333static int udf_show_options(struct seq_file *seq, struct dentry *root)
Miklos Szeredi6da80892008-02-08 04:21:50 -0800334{
Al Viro34c80b12011-12-08 21:32:45 -0500335 struct super_block *sb = root->d_sb;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800336 struct udf_sb_info *sbi = UDF_SB(sb);
337
338 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
339 seq_puts(seq, ",nostrict");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +0100340 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
Miklos Szeredi6da80892008-02-08 04:21:50 -0800341 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
342 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
343 seq_puts(seq, ",unhide");
344 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
345 seq_puts(seq, ",undelete");
346 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
347 seq_puts(seq, ",noadinicb");
348 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
349 seq_puts(seq, ",shortad");
350 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
351 seq_puts(seq, ",uid=forget");
352 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
353 seq_puts(seq, ",uid=ignore");
354 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
355 seq_puts(seq, ",gid=forget");
356 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
357 seq_puts(seq, ",gid=ignore");
358 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -0800359 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
Miklos Szeredi6da80892008-02-08 04:21:50 -0800360 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -0800361 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
Miklos Szeredi6da80892008-02-08 04:21:50 -0800362 if (sbi->s_umask != 0)
Al Virofaa17292011-07-26 03:18:29 -0400363 seq_printf(seq, ",umask=%ho", sbi->s_umask);
Marcin Slusarz87bc7302008-12-02 13:40:11 +0100364 if (sbi->s_fmode != UDF_INVALID_MODE)
Al Virofaa17292011-07-26 03:18:29 -0400365 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
Marcin Slusarz87bc7302008-12-02 13:40:11 +0100366 if (sbi->s_dmode != UDF_INVALID_MODE)
Al Virofaa17292011-07-26 03:18:29 -0400367 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
Miklos Szeredi6da80892008-02-08 04:21:50 -0800368 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
369 seq_printf(seq, ",session=%u", sbi->s_session);
370 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
371 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
Jan Kara403460052009-03-19 16:21:38 +0100372 if (sbi->s_anchor != 0)
373 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
Miklos Szeredi6da80892008-02-08 04:21:50 -0800374 /*
375 * volume, partition, fileset and rootdir seem to be ignored
376 * currently
377 */
378 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
379 seq_puts(seq, ",utf8");
380 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
381 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
382
383 return 0;
384}
385
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386/*
387 * udf_parse_options
388 *
389 * PURPOSE
390 * Parse mount options.
391 *
392 * DESCRIPTION
393 * The following mount options are supported:
394 *
395 * gid= Set the default group.
396 * umask= Set the default umask.
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100397 * mode= Set the default file permissions.
398 * dmode= Set the default directory permissions.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 * uid= Set the default user.
400 * bs= Set the block size.
401 * unhide Show otherwise hidden files.
402 * undelete Show deleted files in lists.
403 * adinicb Embed data in the inode (default)
404 * noadinicb Don't embed data in the inode
405 * shortad Use short ad's
406 * longad Use long ad's (default)
407 * nostrict Unset strict conformance
408 * iocharset= Set the NLS character set
409 *
410 * The remaining are for debugging and disaster recovery:
411 *
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700412 * novrs Skip volume sequence recognition
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 *
414 * The following expect a offset from 0.
415 *
416 * session= Set the CDROM session (default= last session)
417 * anchor= Override standard anchor location. (default= 256)
418 * volume= Override the VolumeDesc location. (unused)
419 * partition= Override the PartitionDesc location. (unused)
420 * lastblock= Set the last block of the filesystem/
421 *
422 * The following expect a offset from the partition root.
423 *
424 * fileset= Override the fileset block location. (unused)
425 * rootdir= Override the root directory location. (unused)
426 * WARNING: overriding the rootdir to a non-directory may
427 * yield highly unpredictable results.
428 *
429 * PRE-CONDITIONS
430 * options Pointer to mount options string.
431 * uopts Pointer to mount options variable.
432 *
433 * POST-CONDITIONS
434 * <return> 1 Mount options parsed okay.
435 * <return> 0 Error parsing mount options.
436 *
437 * HISTORY
438 * July 1, 1997 - Andrew E. Mileski
439 * Written, tested, and released.
440 */
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700441
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442enum {
443 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
444 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
445 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
446 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
447 Opt_rootdir, Opt_utf8, Opt_iocharset,
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100448 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
449 Opt_fmode, Opt_dmode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450};
451
Steven Whitehousea447c092008-10-13 10:46:57 +0100452static const match_table_t tokens = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700453 {Opt_novrs, "novrs"},
454 {Opt_nostrict, "nostrict"},
455 {Opt_bs, "bs=%u"},
456 {Opt_unhide, "unhide"},
457 {Opt_undelete, "undelete"},
458 {Opt_noadinicb, "noadinicb"},
459 {Opt_adinicb, "adinicb"},
460 {Opt_shortad, "shortad"},
461 {Opt_longad, "longad"},
462 {Opt_uforget, "uid=forget"},
463 {Opt_uignore, "uid=ignore"},
464 {Opt_gforget, "gid=forget"},
465 {Opt_gignore, "gid=ignore"},
466 {Opt_gid, "gid=%u"},
467 {Opt_uid, "uid=%u"},
468 {Opt_umask, "umask=%o"},
469 {Opt_session, "session=%u"},
470 {Opt_lastblock, "lastblock=%u"},
471 {Opt_anchor, "anchor=%u"},
472 {Opt_volume, "volume=%u"},
473 {Opt_partition, "partition=%u"},
474 {Opt_fileset, "fileset=%u"},
475 {Opt_rootdir, "rootdir=%u"},
476 {Opt_utf8, "utf8"},
477 {Opt_iocharset, "iocharset=%s"},
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100478 {Opt_fmode, "mode=%o"},
479 {Opt_dmode, "dmode=%o"},
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700480 {Opt_err, NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481};
482
Miklos Szeredi6da80892008-02-08 04:21:50 -0800483static int udf_parse_options(char *options, struct udf_options *uopt,
484 bool remount)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485{
486 char *p;
487 int option;
488
489 uopt->novrs = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 uopt->partition = 0xFFFF;
491 uopt->session = 0xFFFFFFFF;
492 uopt->lastblock = 0;
493 uopt->anchor = 0;
494 uopt->volume = 0xFFFFFFFF;
495 uopt->rootdir = 0xFFFFFFFF;
496 uopt->fileset = 0xFFFFFFFF;
497 uopt->nls_map = NULL;
498
499 if (!options)
500 return 1;
501
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700502 while ((p = strsep(&options, ",")) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 substring_t args[MAX_OPT_ARGS];
504 int token;
505 if (!*p)
506 continue;
507
508 token = match_token(p, tokens, args);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700509 switch (token) {
510 case Opt_novrs:
511 uopt->novrs = 1;
Clemens Ladisch41368012009-03-06 09:16:49 +0100512 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700513 case Opt_bs:
514 if (match_int(&args[0], &option))
515 return 0;
516 uopt->blocksize = option;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +0100517 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700518 break;
519 case Opt_unhide:
520 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
521 break;
522 case Opt_undelete:
523 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
524 break;
525 case Opt_noadinicb:
526 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
527 break;
528 case Opt_adinicb:
529 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
530 break;
531 case Opt_shortad:
532 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
533 break;
534 case Opt_longad:
535 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
536 break;
537 case Opt_gid:
538 if (match_int(args, &option))
539 return 0;
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -0800540 uopt->gid = make_kgid(current_user_ns(), option);
541 if (!gid_valid(uopt->gid))
542 return 0;
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -0700543 uopt->flags |= (1 << UDF_FLAG_GID_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700544 break;
545 case Opt_uid:
546 if (match_int(args, &option))
547 return 0;
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -0800548 uopt->uid = make_kuid(current_user_ns(), option);
549 if (!uid_valid(uopt->uid))
550 return 0;
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -0700551 uopt->flags |= (1 << UDF_FLAG_UID_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700552 break;
553 case Opt_umask:
554 if (match_octal(args, &option))
555 return 0;
556 uopt->umask = option;
557 break;
558 case Opt_nostrict:
559 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
560 break;
561 case Opt_session:
562 if (match_int(args, &option))
563 return 0;
564 uopt->session = option;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800565 if (!remount)
566 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700567 break;
568 case Opt_lastblock:
569 if (match_int(args, &option))
570 return 0;
571 uopt->lastblock = option;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800572 if (!remount)
573 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700574 break;
575 case Opt_anchor:
576 if (match_int(args, &option))
577 return 0;
578 uopt->anchor = option;
579 break;
580 case Opt_volume:
581 if (match_int(args, &option))
582 return 0;
583 uopt->volume = option;
584 break;
585 case Opt_partition:
586 if (match_int(args, &option))
587 return 0;
588 uopt->partition = option;
589 break;
590 case Opt_fileset:
591 if (match_int(args, &option))
592 return 0;
593 uopt->fileset = option;
594 break;
595 case Opt_rootdir:
596 if (match_int(args, &option))
597 return 0;
598 uopt->rootdir = option;
599 break;
600 case Opt_utf8:
601 uopt->flags |= (1 << UDF_FLAG_UTF8);
602 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603#ifdef CONFIG_UDF_NLS
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700604 case Opt_iocharset:
605 uopt->nls_map = load_nls(args[0].from);
606 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
607 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608#endif
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700609 case Opt_uignore:
610 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
611 break;
612 case Opt_uforget:
613 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
614 break;
615 case Opt_gignore:
616 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
617 break;
618 case Opt_gforget:
619 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
620 break;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100621 case Opt_fmode:
622 if (match_octal(args, &option))
623 return 0;
624 uopt->fmode = option & 0777;
625 break;
626 case Opt_dmode:
627 if (match_octal(args, &option))
628 return 0;
629 uopt->dmode = option & 0777;
630 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700631 default:
Joe Perches78ace702011-10-10 01:08:05 -0700632 pr_err("bad mount option \"%s\" or missing value\n", p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 return 0;
634 }
635 }
636 return 1;
637}
638
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700639static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640{
641 struct udf_options uopt;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800642 struct udf_sb_info *sbi = UDF_SB(sb);
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400643 int error = 0;
Jan Kara69d75672013-09-12 22:00:15 +0200644 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645
Jan Kara69d75672013-09-12 22:00:15 +0200646 if (lvidiu) {
647 int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
Jan Karae729eac2013-07-25 16:15:16 +0200648 if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY))
649 return -EACCES;
650 }
651
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800652 uopt.flags = sbi->s_flags;
653 uopt.uid = sbi->s_uid;
654 uopt.gid = sbi->s_gid;
655 uopt.umask = sbi->s_umask;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100656 uopt.fmode = sbi->s_fmode;
657 uopt.dmode = sbi->s_dmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658
Miklos Szeredi6da80892008-02-08 04:21:50 -0800659 if (!udf_parse_options(options, &uopt, true))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 return -EINVAL;
661
Jan Karac03cad22010-10-20 22:17:28 +0200662 write_lock(&sbi->s_cred_lock);
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800663 sbi->s_flags = uopt.flags;
664 sbi->s_uid = uopt.uid;
665 sbi->s_gid = uopt.gid;
666 sbi->s_umask = uopt.umask;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100667 sbi->s_fmode = uopt.fmode;
668 sbi->s_dmode = uopt.dmode;
Jan Karac03cad22010-10-20 22:17:28 +0200669 write_unlock(&sbi->s_cred_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400671 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
672 goto out_unlock;
673
Jan Kara36350462010-05-19 16:28:56 +0200674 if (*flags & MS_RDONLY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 udf_close_lvid(sb);
Jan Kara36350462010-05-19 16:28:56 +0200676 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 udf_open_lvid(sb);
678
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400679out_unlock:
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400680 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681}
682
Jan Kara403460052009-03-19 16:21:38 +0100683/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
684/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
685static loff_t udf_check_vsd(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686{
687 struct volStructDesc *vsd = NULL;
Sebastian Manciuleaf4bcbbd2008-04-08 14:02:11 +0200688 loff_t sector = 32768;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 int sectorsize;
690 struct buffer_head *bh = NULL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700691 int nsr02 = 0;
692 int nsr03 = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800693 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800695 sbi = UDF_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 if (sb->s_blocksize < sizeof(struct volStructDesc))
697 sectorsize = sizeof(struct volStructDesc);
698 else
699 sectorsize = sb->s_blocksize;
700
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800701 sector += (sbi->s_session << sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702
703 udf_debug("Starting at sector %u (%ld byte sectors)\n",
Sebastian Manciulea706047a2008-04-14 17:13:01 +0200704 (unsigned int)(sector >> sb->s_blocksize_bits),
705 sb->s_blocksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 /* Process the sequence (if applicable) */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700707 for (; !nsr02 && !nsr03; sector += sectorsize) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 /* Read a block */
709 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
710 if (!bh)
711 break;
712
713 /* Look for ISO descriptors */
714 vsd = (struct volStructDesc *)(bh->b_data +
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800715 (sector & (sb->s_blocksize - 1)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700717 if (vsd->stdIdent[0] == 0) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700718 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 break;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800720 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
721 VSD_STD_ID_LEN)) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700722 switch (vsd->structType) {
723 case 0:
724 udf_debug("ISO9660 Boot Record found\n");
725 break;
726 case 1:
Joe Perchesa983f362011-10-10 01:08:07 -0700727 udf_debug("ISO9660 Primary Volume Descriptor found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700728 break;
729 case 2:
Joe Perchesa983f362011-10-10 01:08:07 -0700730 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700731 break;
732 case 3:
Joe Perchesa983f362011-10-10 01:08:07 -0700733 udf_debug("ISO9660 Volume Partition Descriptor found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700734 break;
735 case 255:
Joe Perchesa983f362011-10-10 01:08:07 -0700736 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700737 break;
738 default:
739 udf_debug("ISO9660 VRS (%u) found\n",
740 vsd->structType);
741 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 }
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800743 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
744 VSD_STD_ID_LEN))
745 ; /* nothing */
746 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
747 VSD_STD_ID_LEN)) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700748 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 break;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800750 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
751 VSD_STD_ID_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 nsr02 = sector;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800753 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
754 VSD_STD_ID_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 nsr03 = sector;
Jan Kara3bf25cb2007-05-08 00:35:16 -0700756 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 }
758
759 if (nsr03)
760 return nsr03;
761 else if (nsr02)
762 return nsr02;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800763 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 return -1;
765 else
766 return 0;
767}
768
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800769static int udf_find_fileset(struct super_block *sb,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200770 struct kernel_lb_addr *fileset,
771 struct kernel_lb_addr *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772{
773 struct buffer_head *bh = NULL;
774 long lastblock;
775 uint16_t ident;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800776 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777
778 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700779 fileset->partitionReferenceNum != 0xFFFF) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200780 bh = udf_read_ptagged(sb, fileset, 0, &ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700782 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 return 1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700784 } else if (ident != TAG_IDENT_FSD) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700785 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 return 1;
787 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700788
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 }
790
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800791 sbi = UDF_SB(sb);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800792 if (!bh) {
793 /* Search backwards through the partitions */
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200794 struct kernel_lb_addr newfileset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700796/* --> cvg: FIXME - is it reasonable? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 return 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700798
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800799 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700800 (newfileset.partitionReferenceNum != 0xFFFF &&
801 fileset->logicalBlockNum == 0xFFFFFFFF &&
802 fileset->partitionReferenceNum == 0xFFFF);
803 newfileset.partitionReferenceNum--) {
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800804 lastblock = sbi->s_partmaps
805 [newfileset.partitionReferenceNum]
806 .s_partition_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 newfileset.logicalBlockNum = 0;
808
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700809 do {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200810 bh = udf_read_ptagged(sb, &newfileset, 0,
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800811 &ident);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700812 if (!bh) {
813 newfileset.logicalBlockNum++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 continue;
815 }
816
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700817 switch (ident) {
818 case TAG_IDENT_SBD:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700819 {
820 struct spaceBitmapDesc *sp;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800821 sp = (struct spaceBitmapDesc *)
822 bh->b_data;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700823 newfileset.logicalBlockNum += 1 +
824 ((le32_to_cpu(sp->numOfBytes) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800825 sizeof(struct spaceBitmapDesc)
826 - 1) >> sb->s_blocksize_bits);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700827 brelse(bh);
828 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700830 case TAG_IDENT_FSD:
831 *fileset = newfileset;
832 break;
833 default:
834 newfileset.logicalBlockNum++;
835 brelse(bh);
836 bh = NULL;
837 break;
838 }
839 } while (newfileset.logicalBlockNum < lastblock &&
840 fileset->logicalBlockNum == 0xFFFFFFFF &&
841 fileset->partitionReferenceNum == 0xFFFF);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 }
843 }
844
845 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700846 fileset->partitionReferenceNum != 0xFFFF) && bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 udf_debug("Fileset at block=%d, partition=%d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700848 fileset->logicalBlockNum,
849 fileset->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800851 sbi->s_partition = fileset->partitionReferenceNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 udf_load_fileset(sb, bh, root);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700853 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 return 0;
855 }
856 return 1;
857}
858
Jan Karad759bfa42013-07-25 19:10:59 +0200859/*
860 * Load primary Volume Descriptor Sequence
861 *
862 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
863 * should be tried.
864 */
Jan Karac0eb31e2008-04-01 16:50:35 +0200865static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866{
867 struct primaryVolDesc *pvoldesc;
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100868 struct ustr *instr, *outstr;
Jan Karac0eb31e2008-04-01 16:50:35 +0200869 struct buffer_head *bh;
870 uint16_t ident;
Jan Karad759bfa42013-07-25 19:10:59 +0200871 int ret = -ENOMEM;
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100872
873 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
874 if (!instr)
Jan Karad759bfa42013-07-25 19:10:59 +0200875 return -ENOMEM;
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100876
877 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
878 if (!outstr)
879 goto out1;
Jan Karac0eb31e2008-04-01 16:50:35 +0200880
881 bh = udf_read_tagged(sb, block, block, &ident);
Jan Karad759bfa42013-07-25 19:10:59 +0200882 if (!bh) {
883 ret = -EAGAIN;
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100884 goto out2;
Jan Karad759bfa42013-07-25 19:10:59 +0200885 }
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100886
Jan Karad759bfa42013-07-25 19:10:59 +0200887 if (ident != TAG_IDENT_PVD) {
888 ret = -EIO;
889 goto out_bh;
890 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891
892 pvoldesc = (struct primaryVolDesc *)bh->b_data;
893
Marcin Slusarz56774802008-02-10 11:25:31 +0100894 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
895 pvoldesc->recordingDateAndTime)) {
Marcin Slusarzaf15a292008-02-10 11:29:10 +0100896#ifdef UDFFS_DEBUG
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200897 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
Joe Perchesa983f362011-10-10 01:08:07 -0700898 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
Marcin Slusarzaf15a292008-02-10 11:29:10 +0100899 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
900 ts->minute, le16_to_cpu(ts->typeAndTimezone));
901#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 }
903
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100904 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
905 if (udf_CS0toUTF8(outstr, instr)) {
906 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
907 outstr->u_len > 31 ? 31 : outstr->u_len);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800908 udf_debug("volIdent[] = '%s'\n",
Joe Perchesa983f362011-10-10 01:08:07 -0700909 UDF_SB(sb)->s_volume_ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100912 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
913 if (udf_CS0toUTF8(outstr, instr))
914 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
Jan Karac0eb31e2008-04-01 16:50:35 +0200915
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100916 ret = 0;
Jan Karad759bfa42013-07-25 19:10:59 +0200917out_bh:
918 brelse(bh);
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100919out2:
920 kfree(outstr);
921out1:
922 kfree(instr);
923 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924}
925
Namjae Jeon3080a742011-10-23 19:28:32 +0900926struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
927 u32 meta_file_loc, u32 partition_num)
928{
929 struct kernel_lb_addr addr;
930 struct inode *metadata_fe;
931
932 addr.logicalBlockNum = meta_file_loc;
933 addr.partitionReferenceNum = partition_num;
934
935 metadata_fe = udf_iget(sb, &addr);
936
937 if (metadata_fe == NULL)
938 udf_warn(sb, "metadata inode efe not found\n");
939 else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
940 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
941 iput(metadata_fe);
942 metadata_fe = NULL;
943 }
944
945 return metadata_fe;
946}
947
Jan Karabfb257a2008-04-08 20:37:21 +0200948static int udf_load_metadata_files(struct super_block *sb, int partition)
949{
950 struct udf_sb_info *sbi = UDF_SB(sb);
951 struct udf_part_map *map;
952 struct udf_meta_data *mdata;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200953 struct kernel_lb_addr addr;
Jan Karabfb257a2008-04-08 20:37:21 +0200954
955 map = &sbi->s_partmaps[partition];
956 mdata = &map->s_type_specific.s_metadata;
957
958 /* metadata address */
Jan Karabfb257a2008-04-08 20:37:21 +0200959 udf_debug("Metadata file location: block = %d part = %d\n",
Namjae Jeon3080a742011-10-23 19:28:32 +0900960 mdata->s_meta_file_loc, map->s_partition_num);
Jan Karabfb257a2008-04-08 20:37:21 +0200961
Namjae Jeon3080a742011-10-23 19:28:32 +0900962 mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb,
963 mdata->s_meta_file_loc, map->s_partition_num);
Jan Karabfb257a2008-04-08 20:37:21 +0200964
965 if (mdata->s_metadata_fe == NULL) {
Namjae Jeon3080a742011-10-23 19:28:32 +0900966 /* mirror file entry */
967 udf_debug("Mirror metadata file location: block = %d part = %d\n",
968 mdata->s_mirror_file_loc, map->s_partition_num);
Jan Karabfb257a2008-04-08 20:37:21 +0200969
Namjae Jeon3080a742011-10-23 19:28:32 +0900970 mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
971 mdata->s_mirror_file_loc, map->s_partition_num);
Jan Karabfb257a2008-04-08 20:37:21 +0200972
Namjae Jeon3080a742011-10-23 19:28:32 +0900973 if (mdata->s_mirror_fe == NULL) {
974 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
Jan Karad759bfa42013-07-25 19:10:59 +0200975 return -EIO;
Namjae Jeon3080a742011-10-23 19:28:32 +0900976 }
Jan Karabfb257a2008-04-08 20:37:21 +0200977 }
978
979 /*
980 * bitmap file entry
981 * Note:
982 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
983 */
984 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
985 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
986 addr.partitionReferenceNum = map->s_partition_num;
987
988 udf_debug("Bitmap file location: block = %d part = %d\n",
Joe Perchesa983f362011-10-10 01:08:07 -0700989 addr.logicalBlockNum, addr.partitionReferenceNum);
Jan Karabfb257a2008-04-08 20:37:21 +0200990
Pekka Enberg97e961f2008-10-15 12:29:03 +0200991 mdata->s_bitmap_fe = udf_iget(sb, &addr);
Jan Karabfb257a2008-04-08 20:37:21 +0200992 if (mdata->s_bitmap_fe == NULL) {
993 if (sb->s_flags & MS_RDONLY)
Joe Perchesa40ecd72011-10-10 01:08:04 -0700994 udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
Jan Karabfb257a2008-04-08 20:37:21 +0200995 else {
Joe Perches8076c362011-10-10 01:08:03 -0700996 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
Jan Karad759bfa42013-07-25 19:10:59 +0200997 return -EIO;
Jan Karabfb257a2008-04-08 20:37:21 +0200998 }
999 }
1000 }
1001
1002 udf_debug("udf_load_metadata_files Ok\n");
Jan Karabfb257a2008-04-08 20:37:21 +02001003 return 0;
Jan Karabfb257a2008-04-08 20:37:21 +02001004}
1005
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001006static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001007 struct kernel_lb_addr *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008{
1009 struct fileSetDesc *fset;
1010
1011 fset = (struct fileSetDesc *)bh->b_data;
1012
1013 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1014
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001015 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001017 udf_debug("Rootdir at block=%d, partition=%d\n",
1018 root->logicalBlockNum, root->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019}
1020
Marcin Slusarz883cb9d2008-02-08 04:20:34 -08001021int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1022{
1023 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
Julia Lawall8dee00b2008-02-14 16:15:45 +01001024 return DIV_ROUND_UP(map->s_partition_len +
1025 (sizeof(struct spaceBitmapDesc) << 3),
1026 sb->s_blocksize * 8);
Marcin Slusarz883cb9d2008-02-08 04:20:34 -08001027}
1028
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001029static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1030{
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001031 struct udf_bitmap *bitmap;
1032 int nr_groups;
1033 int size;
1034
Marcin Slusarz883cb9d2008-02-08 04:20:34 -08001035 nr_groups = udf_compute_nr_groups(sb, index);
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001036 size = sizeof(struct udf_bitmap) +
1037 (sizeof(struct buffer_head *) * nr_groups);
1038
1039 if (size <= PAGE_SIZE)
Joe Perchesed2ae6f2010-11-04 20:08:04 -07001040 bitmap = kzalloc(size, GFP_KERNEL);
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001041 else
Joe Perchesed2ae6f2010-11-04 20:08:04 -07001042 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001043
Joe Perches75b09e02012-01-31 14:42:10 -08001044 if (bitmap == NULL)
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001045 return NULL;
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001046
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001047 bitmap->s_nr_groups = nr_groups;
1048 return bitmap;
1049}
1050
Jan Kara3fb38df2008-04-02 12:26:36 +02001051static int udf_fill_partdesc_info(struct super_block *sb,
1052 struct partitionDesc *p, int p_index)
1053{
1054 struct udf_part_map *map;
1055 struct udf_sb_info *sbi = UDF_SB(sb);
1056 struct partitionHeaderDesc *phd;
1057
1058 map = &sbi->s_partmaps[p_index];
1059
1060 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1061 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1062
1063 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1064 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1065 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1066 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1067 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1068 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1069 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1070 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1071
Joe Perchesa983f362011-10-10 01:08:07 -07001072 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1073 p_index, map->s_partition_type,
1074 map->s_partition_root, map->s_partition_len);
Jan Kara3fb38df2008-04-02 12:26:36 +02001075
1076 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1077 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1078 return 0;
1079
1080 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1081 if (phd->unallocSpaceTable.extLength) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001082 struct kernel_lb_addr loc = {
Jan Kara3fb38df2008-04-02 12:26:36 +02001083 .logicalBlockNum = le32_to_cpu(
1084 phd->unallocSpaceTable.extPosition),
1085 .partitionReferenceNum = p_index,
1086 };
1087
Pekka Enberg97e961f2008-10-15 12:29:03 +02001088 map->s_uspace.s_table = udf_iget(sb, &loc);
Jan Kara3fb38df2008-04-02 12:26:36 +02001089 if (!map->s_uspace.s_table) {
1090 udf_debug("cannot load unallocSpaceTable (part %d)\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001091 p_index);
Jan Karad759bfa42013-07-25 19:10:59 +02001092 return -EIO;
Jan Kara3fb38df2008-04-02 12:26:36 +02001093 }
1094 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1095 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001096 p_index, map->s_uspace.s_table->i_ino);
Jan Kara3fb38df2008-04-02 12:26:36 +02001097 }
1098
1099 if (phd->unallocSpaceBitmap.extLength) {
1100 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1101 if (!bitmap)
Jan Karad759bfa42013-07-25 19:10:59 +02001102 return -ENOMEM;
Jan Kara3fb38df2008-04-02 12:26:36 +02001103 map->s_uspace.s_bitmap = bitmap;
Jan Kara3fb38df2008-04-02 12:26:36 +02001104 bitmap->s_extPosition = le32_to_cpu(
1105 phd->unallocSpaceBitmap.extPosition);
1106 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
Joe Perchesa983f362011-10-10 01:08:07 -07001107 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1108 p_index, bitmap->s_extPosition);
Jan Kara3fb38df2008-04-02 12:26:36 +02001109 }
1110
1111 if (phd->partitionIntegrityTable.extLength)
1112 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1113
1114 if (phd->freedSpaceTable.extLength) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001115 struct kernel_lb_addr loc = {
Jan Kara3fb38df2008-04-02 12:26:36 +02001116 .logicalBlockNum = le32_to_cpu(
1117 phd->freedSpaceTable.extPosition),
1118 .partitionReferenceNum = p_index,
1119 };
1120
Pekka Enberg97e961f2008-10-15 12:29:03 +02001121 map->s_fspace.s_table = udf_iget(sb, &loc);
Jan Kara3fb38df2008-04-02 12:26:36 +02001122 if (!map->s_fspace.s_table) {
1123 udf_debug("cannot load freedSpaceTable (part %d)\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001124 p_index);
Jan Karad759bfa42013-07-25 19:10:59 +02001125 return -EIO;
Jan Kara3fb38df2008-04-02 12:26:36 +02001126 }
1127
1128 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1129 udf_debug("freedSpaceTable (part %d) @ %ld\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001130 p_index, map->s_fspace.s_table->i_ino);
Jan Kara3fb38df2008-04-02 12:26:36 +02001131 }
1132
1133 if (phd->freedSpaceBitmap.extLength) {
1134 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1135 if (!bitmap)
Jan Karad759bfa42013-07-25 19:10:59 +02001136 return -ENOMEM;
Jan Kara3fb38df2008-04-02 12:26:36 +02001137 map->s_fspace.s_bitmap = bitmap;
Jan Kara3fb38df2008-04-02 12:26:36 +02001138 bitmap->s_extPosition = le32_to_cpu(
1139 phd->freedSpaceBitmap.extPosition);
1140 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
Joe Perchesa983f362011-10-10 01:08:07 -07001141 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1142 p_index, bitmap->s_extPosition);
Jan Kara3fb38df2008-04-02 12:26:36 +02001143 }
1144 return 0;
1145}
1146
Jan Karae971b0b2009-11-30 19:47:55 +01001147static void udf_find_vat_block(struct super_block *sb, int p_index,
1148 int type1_index, sector_t start_block)
1149{
1150 struct udf_sb_info *sbi = UDF_SB(sb);
1151 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1152 sector_t vat_block;
1153 struct kernel_lb_addr ino;
1154
1155 /*
1156 * VAT file entry is in the last recorded block. Some broken disks have
1157 * it a few blocks before so try a bit harder...
1158 */
1159 ino.partitionReferenceNum = type1_index;
1160 for (vat_block = start_block;
1161 vat_block >= map->s_partition_root &&
1162 vat_block >= start_block - 3 &&
1163 !sbi->s_vat_inode; vat_block--) {
1164 ino.logicalBlockNum = vat_block - map->s_partition_root;
1165 sbi->s_vat_inode = udf_iget(sb, &ino);
1166 }
1167}
1168
Jan Kara38b74a52008-04-02 16:01:35 +02001169static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1170{
1171 struct udf_sb_info *sbi = UDF_SB(sb);
1172 struct udf_part_map *map = &sbi->s_partmaps[p_index];
Jan Karafa5e0812008-04-08 02:08:53 +02001173 struct buffer_head *bh = NULL;
1174 struct udf_inode_info *vati;
1175 uint32_t pos;
1176 struct virtualAllocationTable20 *vat20;
Jan Kara4bf17af2009-07-14 19:30:23 +02001177 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
Jan Kara38b74a52008-04-02 16:01:35 +02001178
Jan Karae971b0b2009-11-30 19:47:55 +01001179 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
Jan Kara4bf17af2009-07-14 19:30:23 +02001180 if (!sbi->s_vat_inode &&
1181 sbi->s_last_block != blocks - 1) {
Joe Perches78ace702011-10-10 01:08:05 -07001182 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1183 (unsigned long)sbi->s_last_block,
1184 (unsigned long)blocks - 1);
Jan Karae971b0b2009-11-30 19:47:55 +01001185 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
Jan Kara4bf17af2009-07-14 19:30:23 +02001186 }
Jan Kara38b74a52008-04-02 16:01:35 +02001187 if (!sbi->s_vat_inode)
Jan Karad759bfa42013-07-25 19:10:59 +02001188 return -EIO;
Jan Kara38b74a52008-04-02 16:01:35 +02001189
1190 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
Sebastian Manciulea47c93582008-04-14 17:06:36 +02001191 map->s_type_specific.s_virtual.s_start_offset = 0;
Jan Kara38b74a52008-04-02 16:01:35 +02001192 map->s_type_specific.s_virtual.s_num_entries =
1193 (sbi->s_vat_inode->i_size - 36) >> 2;
1194 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
Jan Karafa5e0812008-04-08 02:08:53 +02001195 vati = UDF_I(sbi->s_vat_inode);
1196 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1197 pos = udf_block_map(sbi->s_vat_inode, 0);
1198 bh = sb_bread(sb, pos);
1199 if (!bh)
Jan Karad759bfa42013-07-25 19:10:59 +02001200 return -EIO;
Jan Karafa5e0812008-04-08 02:08:53 +02001201 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1202 } else {
1203 vat20 = (struct virtualAllocationTable20 *)
1204 vati->i_ext.i_data;
1205 }
Jan Kara38b74a52008-04-02 16:01:35 +02001206
Jan Kara38b74a52008-04-02 16:01:35 +02001207 map->s_type_specific.s_virtual.s_start_offset =
Sebastian Manciulea47c93582008-04-14 17:06:36 +02001208 le16_to_cpu(vat20->lengthHeader);
Jan Kara38b74a52008-04-02 16:01:35 +02001209 map->s_type_specific.s_virtual.s_num_entries =
1210 (sbi->s_vat_inode->i_size -
1211 map->s_type_specific.s_virtual.
1212 s_start_offset) >> 2;
1213 brelse(bh);
1214 }
1215 return 0;
1216}
1217
Jan Karad759bfa42013-07-25 19:10:59 +02001218/*
1219 * Load partition descriptor block
1220 *
1221 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1222 * sequence.
1223 */
Jan Karac0eb31e2008-04-01 16:50:35 +02001224static int udf_load_partdesc(struct super_block *sb, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225{
Jan Karac0eb31e2008-04-01 16:50:35 +02001226 struct buffer_head *bh;
Jan Karac0eb31e2008-04-01 16:50:35 +02001227 struct partitionDesc *p;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001228 struct udf_part_map *map;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001229 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Kara38b74a52008-04-02 16:01:35 +02001230 int i, type1_idx;
Jan Karac0eb31e2008-04-01 16:50:35 +02001231 uint16_t partitionNumber;
1232 uint16_t ident;
Jan Karad759bfa42013-07-25 19:10:59 +02001233 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234
Jan Karac0eb31e2008-04-01 16:50:35 +02001235 bh = udf_read_tagged(sb, block, block, &ident);
1236 if (!bh)
Jan Karad759bfa42013-07-25 19:10:59 +02001237 return -EAGAIN;
1238 if (ident != TAG_IDENT_PD) {
1239 ret = 0;
Jan Karac0eb31e2008-04-01 16:50:35 +02001240 goto out_bh;
Jan Karad759bfa42013-07-25 19:10:59 +02001241 }
Jan Karac0eb31e2008-04-01 16:50:35 +02001242
1243 p = (struct partitionDesc *)bh->b_data;
1244 partitionNumber = le16_to_cpu(p->partitionNumber);
Jan Kara38b74a52008-04-02 16:01:35 +02001245
Jan Karabfb257a2008-04-08 20:37:21 +02001246 /* First scan for TYPE1, SPARABLE and METADATA partitions */
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001247 for (i = 0; i < sbi->s_partitions; i++) {
1248 map = &sbi->s_partmaps[i];
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001249 udf_debug("Searching map: (%d == %d)\n",
Marcin Slusarz165923f2008-02-10 11:33:08 +01001250 map->s_partition_num, partitionNumber);
Jan Kara38b74a52008-04-02 16:01:35 +02001251 if (map->s_partition_num == partitionNumber &&
1252 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1253 map->s_partition_type == UDF_SPARABLE_MAP15))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 break;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001255 }
1256
Jan Kara38b74a52008-04-02 16:01:35 +02001257 if (i >= sbi->s_partitions) {
Marcin Slusarz165923f2008-02-10 11:33:08 +01001258 udf_debug("Partition (%d) not found in partition map\n",
1259 partitionNumber);
Jan Karad759bfa42013-07-25 19:10:59 +02001260 ret = 0;
Jan Karac0eb31e2008-04-01 16:50:35 +02001261 goto out_bh;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001262 }
1263
Jan Kara3fb38df2008-04-02 12:26:36 +02001264 ret = udf_fill_partdesc_info(sb, p, i);
Jan Karad759bfa42013-07-25 19:10:59 +02001265 if (ret < 0)
1266 goto out_bh;
Jan Kara38b74a52008-04-02 16:01:35 +02001267
1268 /*
Jan Karabfb257a2008-04-08 20:37:21 +02001269 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1270 * PHYSICAL partitions are already set up
Jan Kara38b74a52008-04-02 16:01:35 +02001271 */
1272 type1_idx = i;
1273 for (i = 0; i < sbi->s_partitions; i++) {
1274 map = &sbi->s_partmaps[i];
1275
1276 if (map->s_partition_num == partitionNumber &&
1277 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
Jan Karabfb257a2008-04-08 20:37:21 +02001278 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1279 map->s_partition_type == UDF_METADATA_MAP25))
Jan Kara38b74a52008-04-02 16:01:35 +02001280 break;
1281 }
1282
Jan Karad759bfa42013-07-25 19:10:59 +02001283 if (i >= sbi->s_partitions) {
1284 ret = 0;
Jan Kara38b74a52008-04-02 16:01:35 +02001285 goto out_bh;
Jan Karad759bfa42013-07-25 19:10:59 +02001286 }
Jan Kara38b74a52008-04-02 16:01:35 +02001287
1288 ret = udf_fill_partdesc_info(sb, p, i);
Jan Karad759bfa42013-07-25 19:10:59 +02001289 if (ret < 0)
Jan Kara38b74a52008-04-02 16:01:35 +02001290 goto out_bh;
1291
Jan Karabfb257a2008-04-08 20:37:21 +02001292 if (map->s_partition_type == UDF_METADATA_MAP25) {
1293 ret = udf_load_metadata_files(sb, i);
Jan Karad759bfa42013-07-25 19:10:59 +02001294 if (ret < 0) {
Joe Perches78ace702011-10-10 01:08:05 -07001295 udf_err(sb, "error loading MetaData partition map %d\n",
1296 i);
Jan Karabfb257a2008-04-08 20:37:21 +02001297 goto out_bh;
1298 }
1299 } else {
Jan Karae729eac2013-07-25 16:15:16 +02001300 /*
1301 * If we have a partition with virtual map, we don't handle
1302 * writing to it (we overwrite blocks instead of relocating
1303 * them).
1304 */
1305 if (!(sb->s_flags & MS_RDONLY)) {
1306 ret = -EACCES;
1307 goto out_bh;
1308 }
Jan Karabfb257a2008-04-08 20:37:21 +02001309 ret = udf_load_vat(sb, i, type1_idx);
Jan Karad759bfa42013-07-25 19:10:59 +02001310 if (ret < 0)
Jan Karabfb257a2008-04-08 20:37:21 +02001311 goto out_bh;
Jan Karabfb257a2008-04-08 20:37:21 +02001312 }
Jan Karad759bfa42013-07-25 19:10:59 +02001313 ret = 0;
Jan Karac0eb31e2008-04-01 16:50:35 +02001314out_bh:
Jan Kara2e0838f2008-04-01 18:08:51 +02001315 /* In case loading failed, we handle cleanup in udf_fill_super */
Jan Karac0eb31e2008-04-01 16:50:35 +02001316 brelse(bh);
1317 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318}
1319
Jan Kara1df2ae32012-06-27 21:23:07 +02001320static int udf_load_sparable_map(struct super_block *sb,
1321 struct udf_part_map *map,
1322 struct sparablePartitionMap *spm)
1323{
1324 uint32_t loc;
1325 uint16_t ident;
1326 struct sparingTable *st;
1327 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1328 int i;
1329 struct buffer_head *bh;
1330
1331 map->s_partition_type = UDF_SPARABLE_MAP15;
1332 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1333 if (!is_power_of_2(sdata->s_packet_len)) {
1334 udf_err(sb, "error loading logical volume descriptor: "
1335 "Invalid packet length %u\n",
1336 (unsigned)sdata->s_packet_len);
1337 return -EIO;
1338 }
1339 if (spm->numSparingTables > 4) {
1340 udf_err(sb, "error loading logical volume descriptor: "
1341 "Too many sparing tables (%d)\n",
1342 (int)spm->numSparingTables);
1343 return -EIO;
1344 }
1345
1346 for (i = 0; i < spm->numSparingTables; i++) {
1347 loc = le32_to_cpu(spm->locSparingTable[i]);
1348 bh = udf_read_tagged(sb, loc, loc, &ident);
1349 if (!bh)
1350 continue;
1351
1352 st = (struct sparingTable *)bh->b_data;
1353 if (ident != 0 ||
1354 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1355 strlen(UDF_ID_SPARING)) ||
1356 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1357 sb->s_blocksize) {
1358 brelse(bh);
1359 continue;
1360 }
1361
1362 sdata->s_spar_map[i] = bh;
1363 }
1364 map->s_partition_func = udf_get_pblock_spar15;
1365 return 0;
1366}
1367
Jan Karac0eb31e2008-04-01 16:50:35 +02001368static int udf_load_logicalvol(struct super_block *sb, sector_t block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001369 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370{
1371 struct logicalVolDesc *lvd;
Jan Kara1df2ae32012-06-27 21:23:07 +02001372 int i, offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373 uint8_t type;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001374 struct udf_sb_info *sbi = UDF_SB(sb);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001375 struct genericPartitionMap *gpm;
Jan Karac0eb31e2008-04-01 16:50:35 +02001376 uint16_t ident;
1377 struct buffer_head *bh;
Jan Karaadee11b2012-06-27 20:20:22 +02001378 unsigned int table_len;
Jan Karad759bfa42013-07-25 19:10:59 +02001379 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380
Jan Karac0eb31e2008-04-01 16:50:35 +02001381 bh = udf_read_tagged(sb, block, block, &ident);
1382 if (!bh)
Jan Karad759bfa42013-07-25 19:10:59 +02001383 return -EAGAIN;
Jan Karac0eb31e2008-04-01 16:50:35 +02001384 BUG_ON(ident != TAG_IDENT_LVD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385 lvd = (struct logicalVolDesc *)bh->b_data;
Jan Karaadee11b2012-06-27 20:20:22 +02001386 table_len = le32_to_cpu(lvd->mapTableLength);
Jan Kara57b96552012-07-10 17:58:04 +02001387 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
Jan Karaadee11b2012-06-27 20:20:22 +02001388 udf_err(sb, "error loading logical volume descriptor: "
1389 "Partition table too long (%u > %lu)\n", table_len,
1390 sb->s_blocksize - sizeof(*lvd));
Jan Karad759bfa42013-07-25 19:10:59 +02001391 ret = -EIO;
Jan Karaadee11b2012-06-27 20:20:22 +02001392 goto out_bh;
1393 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394
Jan Karacb14d342012-06-27 20:08:44 +02001395 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1396 if (ret)
Jan Karac0eb31e2008-04-01 16:50:35 +02001397 goto out_bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001399 for (i = 0, offset = 0;
Jan Karaadee11b2012-06-27 20:20:22 +02001400 i < sbi->s_partitions && offset < table_len;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001401 i++, offset += gpm->partitionMapLength) {
1402 struct udf_part_map *map = &sbi->s_partmaps[i];
1403 gpm = (struct genericPartitionMap *)
1404 &(lvd->partitionMaps[offset]);
1405 type = gpm->partitionMapType;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001406 if (type == 1) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001407 struct genericPartitionMap1 *gpm1 =
1408 (struct genericPartitionMap1 *)gpm;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001409 map->s_partition_type = UDF_TYPE1_MAP15;
1410 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1411 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1412 map->s_partition_func = NULL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001413 } else if (type == 2) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001414 struct udfPartitionMap2 *upm2 =
1415 (struct udfPartitionMap2 *)gpm;
1416 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1417 strlen(UDF_ID_VIRTUAL))) {
1418 u16 suf =
1419 le16_to_cpu(((__le16 *)upm2->partIdent.
1420 identSuffix)[0]);
Jan Karac82a1272008-04-08 01:16:32 +02001421 if (suf < 0x0200) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001422 map->s_partition_type =
1423 UDF_VIRTUAL_MAP15;
1424 map->s_partition_func =
1425 udf_get_pblock_virt15;
Jan Karac82a1272008-04-08 01:16:32 +02001426 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001427 map->s_partition_type =
1428 UDF_VIRTUAL_MAP20;
1429 map->s_partition_func =
1430 udf_get_pblock_virt20;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431 }
Marcin Slusarz4b111112008-02-08 04:20:36 -08001432 } else if (!strncmp(upm2->partIdent.ident,
1433 UDF_ID_SPARABLE,
1434 strlen(UDF_ID_SPARABLE))) {
Jan Karad759bfa42013-07-25 19:10:59 +02001435 ret = udf_load_sparable_map(sb, map,
1436 (struct sparablePartitionMap *)gpm);
1437 if (ret < 0)
Jan Kara1df2ae32012-06-27 21:23:07 +02001438 goto out_bh;
Jan Karabfb257a2008-04-08 20:37:21 +02001439 } else if (!strncmp(upm2->partIdent.ident,
1440 UDF_ID_METADATA,
1441 strlen(UDF_ID_METADATA))) {
1442 struct udf_meta_data *mdata =
1443 &map->s_type_specific.s_metadata;
1444 struct metadataPartitionMap *mdm =
1445 (struct metadataPartitionMap *)
1446 &(lvd->partitionMaps[offset]);
Joe Perchesa983f362011-10-10 01:08:07 -07001447 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1448 i, type, UDF_ID_METADATA);
Jan Karabfb257a2008-04-08 20:37:21 +02001449
1450 map->s_partition_type = UDF_METADATA_MAP25;
1451 map->s_partition_func = udf_get_pblock_meta25;
1452
1453 mdata->s_meta_file_loc =
1454 le32_to_cpu(mdm->metadataFileLoc);
1455 mdata->s_mirror_file_loc =
1456 le32_to_cpu(mdm->metadataMirrorFileLoc);
1457 mdata->s_bitmap_file_loc =
1458 le32_to_cpu(mdm->metadataBitmapFileLoc);
1459 mdata->s_alloc_unit_size =
1460 le32_to_cpu(mdm->allocUnitSize);
1461 mdata->s_align_unit_size =
1462 le16_to_cpu(mdm->alignUnitSize);
Jan Karaed47a7d2011-10-24 16:47:48 +02001463 if (mdm->flags & 0x01)
1464 mdata->s_flags |= MF_DUPLICATE_MD;
Jan Karabfb257a2008-04-08 20:37:21 +02001465
1466 udf_debug("Metadata Ident suffix=0x%x\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001467 le16_to_cpu(*(__le16 *)
1468 mdm->partIdent.identSuffix));
Jan Karabfb257a2008-04-08 20:37:21 +02001469 udf_debug("Metadata part num=%d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001470 le16_to_cpu(mdm->partitionNum));
Jan Karabfb257a2008-04-08 20:37:21 +02001471 udf_debug("Metadata part alloc unit size=%d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001472 le32_to_cpu(mdm->allocUnitSize));
Jan Karabfb257a2008-04-08 20:37:21 +02001473 udf_debug("Metadata file loc=%d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001474 le32_to_cpu(mdm->metadataFileLoc));
Jan Karabfb257a2008-04-08 20:37:21 +02001475 udf_debug("Mirror file loc=%d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001476 le32_to_cpu(mdm->metadataMirrorFileLoc));
Jan Karabfb257a2008-04-08 20:37:21 +02001477 udf_debug("Bitmap file loc=%d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001478 le32_to_cpu(mdm->metadataBitmapFileLoc));
Jan Karaed47a7d2011-10-24 16:47:48 +02001479 udf_debug("Flags: %d %d\n",
1480 mdata->s_flags, mdm->flags);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001481 } else {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001482 udf_debug("Unknown ident: %s\n",
1483 upm2->partIdent.ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484 continue;
1485 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001486 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1487 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 }
1489 udf_debug("Partition (%d:%d) type %d on volume %d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001490 i, map->s_partition_num, type, map->s_volumeseqnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491 }
1492
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001493 if (fileset) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001494 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495
1496 *fileset = lelb_to_cpu(la->extLocation);
Joe Perchesa983f362011-10-10 01:08:07 -07001497 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1498 fileset->logicalBlockNum,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001499 fileset->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500 }
1501 if (lvd->integritySeqExt.extLength)
1502 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
Jan Karad759bfa42013-07-25 19:10:59 +02001503 ret = 0;
Jan Karac0eb31e2008-04-01 16:50:35 +02001504out_bh:
1505 brelse(bh);
1506 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507}
1508
1509/*
1510 * udf_load_logicalvolint
1511 *
1512 */
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001513static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001514{
1515 struct buffer_head *bh = NULL;
1516 uint16_t ident;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001517 struct udf_sb_info *sbi = UDF_SB(sb);
1518 struct logicalVolIntegrityDesc *lvid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519
1520 while (loc.extLength > 0 &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001521 (bh = udf_read_tagged(sb, loc.extLocation,
1522 loc.extLocation, &ident)) &&
1523 ident == TAG_IDENT_LVID) {
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001524 sbi->s_lvid_bh = bh;
1525 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001526
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001527 if (lvid->nextIntegrityExt.extLength)
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001528 udf_load_logicalvolint(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001529 leea_to_cpu(lvid->nextIntegrityExt));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001530
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001531 if (sbi->s_lvid_bh != bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001532 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533 loc.extLength -= sb->s_blocksize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001534 loc.extLocation++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001536 if (sbi->s_lvid_bh != bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001537 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538}
1539
1540/*
Jan Karad759bfa42013-07-25 19:10:59 +02001541 * Process a main/reserve volume descriptor sequence.
1542 * @block First block of first extent of the sequence.
1543 * @lastblock Lastblock of first extent of the sequence.
1544 * @fileset There we store extent containing root fileset
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545 *
Jan Karad759bfa42013-07-25 19:10:59 +02001546 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1547 * sequence
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 */
Jan Karad759bfa42013-07-25 19:10:59 +02001549static noinline int udf_process_sequence(
1550 struct super_block *sb,
1551 sector_t block, sector_t lastblock,
1552 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553{
1554 struct buffer_head *bh = NULL;
1555 struct udf_vds_record vds[VDS_POS_LENGTH];
Marcin Slusarz4b111112008-02-08 04:20:36 -08001556 struct udf_vds_record *curr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557 struct generic_desc *gd;
1558 struct volDescPtr *vdp;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001559 int done = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560 uint32_t vdsn;
1561 uint16_t ident;
1562 long next_s = 0, next_e = 0;
Jan Karad759bfa42013-07-25 19:10:59 +02001563 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564
1565 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1566
Jan Karac0eb31e2008-04-01 16:50:35 +02001567 /*
1568 * Read the main descriptor sequence and find which descriptors
1569 * are in it.
1570 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001571 for (; (!done && block <= lastblock); block++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572
1573 bh = udf_read_tagged(sb, block, block, &ident);
Jan Karac0eb31e2008-04-01 16:50:35 +02001574 if (!bh) {
Joe Perches78ace702011-10-10 01:08:05 -07001575 udf_err(sb,
1576 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1577 (unsigned long long)block);
Jan Karad759bfa42013-07-25 19:10:59 +02001578 return -EAGAIN;
Jan Karac0eb31e2008-04-01 16:50:35 +02001579 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580
1581 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1582 gd = (struct generic_desc *)bh->b_data;
1583 vdsn = le32_to_cpu(gd->volDescSeqNum);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001584 switch (ident) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001585 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001586 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1587 if (vdsn >= curr->volDescSeqNum) {
1588 curr->volDescSeqNum = vdsn;
1589 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001590 }
1591 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001592 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001593 curr = &vds[VDS_POS_VOL_DESC_PTR];
1594 if (vdsn >= curr->volDescSeqNum) {
1595 curr->volDescSeqNum = vdsn;
1596 curr->block = block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001598 vdp = (struct volDescPtr *)bh->b_data;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001599 next_s = le32_to_cpu(
1600 vdp->nextVolDescSeqExt.extLocation);
1601 next_e = le32_to_cpu(
1602 vdp->nextVolDescSeqExt.extLength);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001603 next_e = next_e >> sb->s_blocksize_bits;
1604 next_e += next_s;
1605 }
1606 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001607 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001608 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1609 if (vdsn >= curr->volDescSeqNum) {
1610 curr->volDescSeqNum = vdsn;
1611 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001612 }
1613 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001614 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001615 curr = &vds[VDS_POS_PARTITION_DESC];
1616 if (!curr->block)
1617 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001618 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001619 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001620 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1621 if (vdsn >= curr->volDescSeqNum) {
1622 curr->volDescSeqNum = vdsn;
1623 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001624 }
1625 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001626 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001627 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1628 if (vdsn >= curr->volDescSeqNum) {
1629 curr->volDescSeqNum = vdsn;
1630 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001631 }
1632 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001633 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001634 vds[VDS_POS_TERMINATING_DESC].block = block;
1635 if (next_e) {
1636 block = next_s;
1637 lastblock = next_e;
1638 next_s = next_e = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001639 } else
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001640 done = 1;
1641 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07001643 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644 }
Jan Karac0eb31e2008-04-01 16:50:35 +02001645 /*
1646 * Now read interesting descriptors again and process them
1647 * in a suitable order
1648 */
1649 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
Joe Perches78ace702011-10-10 01:08:05 -07001650 udf_err(sb, "Primary Volume Descriptor not found!\n");
Jan Karad759bfa42013-07-25 19:10:59 +02001651 return -EAGAIN;
Jan Karac0eb31e2008-04-01 16:50:35 +02001652 }
Jan Karad759bfa42013-07-25 19:10:59 +02001653 ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
1654 if (ret < 0)
1655 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656
Jan Karad759bfa42013-07-25 19:10:59 +02001657 if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1658 ret = udf_load_logicalvol(sb,
1659 vds[VDS_POS_LOGICAL_VOL_DESC].block,
1660 fileset);
1661 if (ret < 0)
1662 return ret;
1663 }
Marcin Slusarz165923f2008-02-10 11:33:08 +01001664
Jan Karac0eb31e2008-04-01 16:50:35 +02001665 if (vds[VDS_POS_PARTITION_DESC].block) {
1666 /*
1667 * We rescan the whole descriptor sequence to find
1668 * partition descriptor blocks and process them.
1669 */
1670 for (block = vds[VDS_POS_PARTITION_DESC].block;
1671 block < vds[VDS_POS_TERMINATING_DESC].block;
Jan Karad759bfa42013-07-25 19:10:59 +02001672 block++) {
1673 ret = udf_load_partdesc(sb, block);
1674 if (ret < 0)
1675 return ret;
1676 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001677 }
1678
1679 return 0;
1680}
1681
Jan Karad759bfa42013-07-25 19:10:59 +02001682/*
1683 * Load Volume Descriptor Sequence described by anchor in bh
1684 *
1685 * Returns <0 on error, 0 on success
1686 */
Jan Kara403460052009-03-19 16:21:38 +01001687static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1688 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689{
Jan Kara403460052009-03-19 16:21:38 +01001690 struct anchorVolDescPtr *anchor;
Jan Karad759bfa42013-07-25 19:10:59 +02001691 sector_t main_s, main_e, reserve_s, reserve_e;
1692 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693
Jan Kara403460052009-03-19 16:21:38 +01001694 anchor = (struct anchorVolDescPtr *)bh->b_data;
1695
1696 /* Locate the main sequence */
1697 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1698 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1699 main_e = main_e >> sb->s_blocksize_bits;
1700 main_e += main_s;
1701
1702 /* Locate the reserve sequence */
1703 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1704 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1705 reserve_e = reserve_e >> sb->s_blocksize_bits;
1706 reserve_e += reserve_s;
1707
1708 /* Process the main & reserve sequences */
1709 /* responsible for finding the PartitionDesc(s) */
Jan Karad759bfa42013-07-25 19:10:59 +02001710 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1711 if (ret != -EAGAIN)
1712 return ret;
Jan Karabff943a2012-06-27 22:27:05 +02001713 udf_sb_free_partitions(sb);
Jan Karad759bfa42013-07-25 19:10:59 +02001714 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1715 if (ret < 0) {
1716 udf_sb_free_partitions(sb);
1717 /* No sequence was OK, return -EIO */
1718 if (ret == -EAGAIN)
1719 ret = -EIO;
1720 }
1721 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722}
1723
Jan Kara403460052009-03-19 16:21:38 +01001724/*
1725 * Check whether there is an anchor block in the given block and
1726 * load Volume Descriptor Sequence if so.
Jan Karad759bfa42013-07-25 19:10:59 +02001727 *
1728 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1729 * block
Jan Kara403460052009-03-19 16:21:38 +01001730 */
1731static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1732 struct kernel_lb_addr *fileset)
1733{
1734 struct buffer_head *bh;
1735 uint16_t ident;
1736 int ret;
1737
1738 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1739 udf_fixed_to_variable(block) >=
1740 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
Jan Karad759bfa42013-07-25 19:10:59 +02001741 return -EAGAIN;
Jan Kara403460052009-03-19 16:21:38 +01001742
1743 bh = udf_read_tagged(sb, block, block, &ident);
1744 if (!bh)
Jan Karad759bfa42013-07-25 19:10:59 +02001745 return -EAGAIN;
Jan Kara403460052009-03-19 16:21:38 +01001746 if (ident != TAG_IDENT_AVDP) {
1747 brelse(bh);
Jan Karad759bfa42013-07-25 19:10:59 +02001748 return -EAGAIN;
Jan Kara403460052009-03-19 16:21:38 +01001749 }
1750 ret = udf_load_sequence(sb, bh, fileset);
1751 brelse(bh);
1752 return ret;
1753}
1754
Jan Karad759bfa42013-07-25 19:10:59 +02001755/*
1756 * Search for an anchor volume descriptor pointer.
1757 *
1758 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1759 * of anchors.
1760 */
1761static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1762 struct kernel_lb_addr *fileset)
Jan Kara403460052009-03-19 16:21:38 +01001763{
1764 sector_t last[6];
1765 int i;
1766 struct udf_sb_info *sbi = UDF_SB(sb);
1767 int last_count = 0;
Jan Karad759bfa42013-07-25 19:10:59 +02001768 int ret;
Jan Kara403460052009-03-19 16:21:38 +01001769
1770 /* First try user provided anchor */
1771 if (sbi->s_anchor) {
Jan Karad759bfa42013-07-25 19:10:59 +02001772 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1773 if (ret != -EAGAIN)
1774 return ret;
Jan Kara403460052009-03-19 16:21:38 +01001775 }
1776 /*
1777 * according to spec, anchor is in either:
1778 * block 256
1779 * lastblock-256
1780 * lastblock
1781 * however, if the disc isn't closed, it could be 512.
1782 */
Jan Karad759bfa42013-07-25 19:10:59 +02001783 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1784 if (ret != -EAGAIN)
1785 return ret;
Jan Kara403460052009-03-19 16:21:38 +01001786 /*
1787 * The trouble is which block is the last one. Drives often misreport
1788 * this so we try various possibilities.
1789 */
Jan Karad759bfa42013-07-25 19:10:59 +02001790 last[last_count++] = *lastblock;
1791 if (*lastblock >= 1)
1792 last[last_count++] = *lastblock - 1;
1793 last[last_count++] = *lastblock + 1;
1794 if (*lastblock >= 2)
1795 last[last_count++] = *lastblock - 2;
1796 if (*lastblock >= 150)
1797 last[last_count++] = *lastblock - 150;
1798 if (*lastblock >= 152)
1799 last[last_count++] = *lastblock - 152;
Jan Kara403460052009-03-19 16:21:38 +01001800
1801 for (i = 0; i < last_count; i++) {
1802 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1803 sb->s_blocksize_bits)
1804 continue;
Jan Karad759bfa42013-07-25 19:10:59 +02001805 ret = udf_check_anchor_block(sb, last[i], fileset);
1806 if (ret != -EAGAIN) {
1807 if (!ret)
1808 *lastblock = last[i];
1809 return ret;
1810 }
Jan Kara403460052009-03-19 16:21:38 +01001811 if (last[i] < 256)
1812 continue;
Jan Karad759bfa42013-07-25 19:10:59 +02001813 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1814 if (ret != -EAGAIN) {
1815 if (!ret)
1816 *lastblock = last[i];
1817 return ret;
1818 }
Jan Kara403460052009-03-19 16:21:38 +01001819 }
1820
1821 /* Finally try block 512 in case media is open */
Jan Karad759bfa42013-07-25 19:10:59 +02001822 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
Jan Kara403460052009-03-19 16:21:38 +01001823}
1824
1825/*
1826 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1827 * area specified by it. The function expects sbi->s_lastblock to be the last
1828 * block on the media.
1829 *
Jan Karad759bfa42013-07-25 19:10:59 +02001830 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1831 * was not found.
Jan Kara403460052009-03-19 16:21:38 +01001832 */
1833static int udf_find_anchor(struct super_block *sb,
1834 struct kernel_lb_addr *fileset)
1835{
Jan Kara403460052009-03-19 16:21:38 +01001836 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Karad759bfa42013-07-25 19:10:59 +02001837 sector_t lastblock = sbi->s_last_block;
1838 int ret;
Jan Kara403460052009-03-19 16:21:38 +01001839
Jan Karad759bfa42013-07-25 19:10:59 +02001840 ret = udf_scan_anchors(sb, &lastblock, fileset);
1841 if (ret != -EAGAIN)
Jan Kara403460052009-03-19 16:21:38 +01001842 goto out;
1843
1844 /* No anchor found? Try VARCONV conversion of block numbers */
1845 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
Jan Karad759bfa42013-07-25 19:10:59 +02001846 lastblock = udf_variable_to_fixed(sbi->s_last_block);
Jan Kara403460052009-03-19 16:21:38 +01001847 /* Firstly, we try to not convert number of the last block */
Jan Karad759bfa42013-07-25 19:10:59 +02001848 ret = udf_scan_anchors(sb, &lastblock, fileset);
1849 if (ret != -EAGAIN)
Jan Kara403460052009-03-19 16:21:38 +01001850 goto out;
1851
Jan Karad759bfa42013-07-25 19:10:59 +02001852 lastblock = sbi->s_last_block;
Jan Kara403460052009-03-19 16:21:38 +01001853 /* Secondly, we try with converted number of the last block */
Jan Karad759bfa42013-07-25 19:10:59 +02001854 ret = udf_scan_anchors(sb, &lastblock, fileset);
1855 if (ret < 0) {
Jan Kara403460052009-03-19 16:21:38 +01001856 /* VARCONV didn't help. Clear it. */
1857 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
Jan Kara403460052009-03-19 16:21:38 +01001858 }
1859out:
Jan Karad759bfa42013-07-25 19:10:59 +02001860 if (ret == 0)
1861 sbi->s_last_block = lastblock;
1862 return ret;
Jan Kara403460052009-03-19 16:21:38 +01001863}
1864
1865/*
1866 * Check Volume Structure Descriptor, find Anchor block and load Volume
Jan Karad759bfa42013-07-25 19:10:59 +02001867 * Descriptor Sequence.
1868 *
1869 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1870 * block was not found.
Jan Kara403460052009-03-19 16:21:38 +01001871 */
1872static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1873 int silent, struct kernel_lb_addr *fileset)
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001874{
1875 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Kara403460052009-03-19 16:21:38 +01001876 loff_t nsr_off;
Jan Karad759bfa42013-07-25 19:10:59 +02001877 int ret;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001878
1879 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1880 if (!silent)
Joe Perches78ace702011-10-10 01:08:05 -07001881 udf_warn(sb, "Bad block size\n");
Jan Karad759bfa42013-07-25 19:10:59 +02001882 return -EINVAL;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001883 }
1884 sbi->s_last_block = uopt->lastblock;
Jan Kara403460052009-03-19 16:21:38 +01001885 if (!uopt->novrs) {
1886 /* Check that it is NSR02 compliant */
1887 nsr_off = udf_check_vsd(sb);
1888 if (!nsr_off) {
1889 if (!silent)
Joe Perches78ace702011-10-10 01:08:05 -07001890 udf_warn(sb, "No VRS found\n");
Jan Kara403460052009-03-19 16:21:38 +01001891 return 0;
1892 }
1893 if (nsr_off == -1)
Joe Perchesa983f362011-10-10 01:08:07 -07001894 udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n");
Jan Kara403460052009-03-19 16:21:38 +01001895 if (!sbi->s_last_block)
1896 sbi->s_last_block = udf_get_last_block(sb);
1897 } else {
1898 udf_debug("Validity check skipped because of novrs option\n");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001899 }
Jan Kara403460052009-03-19 16:21:38 +01001900
1901 /* Look for anchor block and load Volume Descriptor Sequence */
1902 sbi->s_anchor = uopt->anchor;
Jan Karad759bfa42013-07-25 19:10:59 +02001903 ret = udf_find_anchor(sb, fileset);
1904 if (ret < 0) {
1905 if (!silent && ret == -EAGAIN)
Joe Perches78ace702011-10-10 01:08:05 -07001906 udf_warn(sb, "No anchor found\n");
Jan Karad759bfa42013-07-25 19:10:59 +02001907 return ret;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001908 }
Jan Karad759bfa42013-07-25 19:10:59 +02001909 return 0;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001910}
1911
Linus Torvalds1da177e2005-04-16 15:20:36 -07001912static void udf_open_lvid(struct super_block *sb)
1913{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001914 struct udf_sb_info *sbi = UDF_SB(sb);
1915 struct buffer_head *bh = sbi->s_lvid_bh;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001916 struct logicalVolIntegrityDesc *lvid;
1917 struct logicalVolIntegrityDescImpUse *lvidiu;
Jan Kara146bca72009-03-16 18:27:37 +01001918
Marcin Slusarz165923f2008-02-10 11:33:08 +01001919 if (!bh)
1920 return;
Jan Kara69d75672013-09-12 22:00:15 +02001921 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1922 lvidiu = udf_sb_lvidiu(sb);
1923 if (!lvidiu)
1924 return;
Jan Kara949f4a72010-10-20 18:49:20 +02001925
1926 mutex_lock(&sbi->s_alloc_mutex);
Marcin Slusarz165923f2008-02-10 11:33:08 +01001927 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1928 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1929 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1930 CURRENT_TIME);
Jan Kara146bca72009-03-16 18:27:37 +01001931 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932
Marcin Slusarz165923f2008-02-10 11:33:08 +01001933 lvid->descTag.descCRC = cpu_to_le16(
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001934 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001935 le16_to_cpu(lvid->descTag.descCRCLength)));
Marcin Slusarz165923f2008-02-10 11:33:08 +01001936
1937 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1938 mark_buffer_dirty(bh);
Jan Kara146bca72009-03-16 18:27:37 +01001939 sbi->s_lvid_dirty = 0;
Jan Kara949f4a72010-10-20 18:49:20 +02001940 mutex_unlock(&sbi->s_alloc_mutex);
Jan Kara9734c972013-01-17 22:11:38 +01001941 /* Make opening of filesystem visible on the media immediately */
1942 sync_dirty_buffer(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943}
1944
1945static void udf_close_lvid(struct super_block *sb)
1946{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001947 struct udf_sb_info *sbi = UDF_SB(sb);
1948 struct buffer_head *bh = sbi->s_lvid_bh;
1949 struct logicalVolIntegrityDesc *lvid;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001950 struct logicalVolIntegrityDescImpUse *lvidiu;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001951
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001952 if (!bh)
1953 return;
Jan Kara69d75672013-09-12 22:00:15 +02001954 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1955 lvidiu = udf_sb_lvidiu(sb);
1956 if (!lvidiu)
1957 return;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001958
Jan Kara949f4a72010-10-20 18:49:20 +02001959 mutex_lock(&sbi->s_alloc_mutex);
Marcin Slusarz165923f2008-02-10 11:33:08 +01001960 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1961 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1962 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1963 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1964 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1965 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1966 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1967 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1968 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1969 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970
Marcin Slusarz165923f2008-02-10 11:33:08 +01001971 lvid->descTag.descCRC = cpu_to_le16(
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001972 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001973 le16_to_cpu(lvid->descTag.descCRCLength)));
Marcin Slusarz165923f2008-02-10 11:33:08 +01001974
1975 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
Jan Kara853a0c22011-12-23 11:53:07 +01001976 /*
1977 * We set buffer uptodate unconditionally here to avoid spurious
1978 * warnings from mark_buffer_dirty() when previous EIO has marked
1979 * the buffer as !uptodate
1980 */
1981 set_buffer_uptodate(bh);
Marcin Slusarz165923f2008-02-10 11:33:08 +01001982 mark_buffer_dirty(bh);
Jan Kara146bca72009-03-16 18:27:37 +01001983 sbi->s_lvid_dirty = 0;
Jan Kara949f4a72010-10-20 18:49:20 +02001984 mutex_unlock(&sbi->s_alloc_mutex);
Jan Kara9734c972013-01-17 22:11:38 +01001985 /* Make closing of filesystem visible on the media immediately */
1986 sync_dirty_buffer(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001987}
1988
Jan Karad664b6a2010-10-20 18:28:46 +02001989u64 lvid_get_unique_id(struct super_block *sb)
1990{
1991 struct buffer_head *bh;
1992 struct udf_sb_info *sbi = UDF_SB(sb);
1993 struct logicalVolIntegrityDesc *lvid;
1994 struct logicalVolHeaderDesc *lvhd;
1995 u64 uniqueID;
1996 u64 ret;
1997
1998 bh = sbi->s_lvid_bh;
1999 if (!bh)
2000 return 0;
2001
2002 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2003 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2004
2005 mutex_lock(&sbi->s_alloc_mutex);
2006 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2007 if (!(++uniqueID & 0xFFFFFFFF))
2008 uniqueID += 16;
2009 lvhd->uniqueID = cpu_to_le64(uniqueID);
2010 mutex_unlock(&sbi->s_alloc_mutex);
2011 mark_buffer_dirty(bh);
2012
2013 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002014}
2015
Linus Torvalds1da177e2005-04-16 15:20:36 -07002016static int udf_fill_super(struct super_block *sb, void *options, int silent)
2017{
Jan Karad759bfa42013-07-25 19:10:59 +02002018 int ret = -EINVAL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002019 struct inode *inode = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002020 struct udf_options uopt;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002021 struct kernel_lb_addr rootdir, fileset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002022 struct udf_sb_info *sbi;
2023
2024 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -08002025 uopt.uid = INVALID_UID;
2026 uopt.gid = INVALID_GID;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027 uopt.umask = 0;
Marcin Slusarz87bc7302008-12-02 13:40:11 +01002028 uopt.fmode = UDF_INVALID_MODE;
2029 uopt.dmode = UDF_INVALID_MODE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002030
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002031 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
Alessio Igor Bogani9db9f9e2010-11-16 18:40:49 +01002032 if (!sbi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033 return -ENOMEM;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002034
Linus Torvalds1da177e2005-04-16 15:20:36 -07002035 sb->s_fs_info = sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036
Ingo Molnar1e7933d2006-03-23 03:00:44 -08002037 mutex_init(&sbi->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002038
Miklos Szeredi6da80892008-02-08 04:21:50 -08002039 if (!udf_parse_options((char *)options, &uopt, false))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040 goto error_out;
2041
2042 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002043 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
Joe Perches8076c362011-10-10 01:08:03 -07002044 udf_err(sb, "utf8 cannot be combined with iocharset\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045 goto error_out;
2046 }
2047#ifdef CONFIG_UDF_NLS
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002048 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049 uopt.nls_map = load_nls_default();
2050 if (!uopt.nls_map)
2051 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2052 else
2053 udf_debug("Using default NLS map\n");
2054 }
2055#endif
2056 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2057 uopt.flags |= (1 << UDF_FLAG_UTF8);
2058
2059 fileset.logicalBlockNum = 0xFFFFFFFF;
2060 fileset.partitionReferenceNum = 0xFFFF;
2061
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002062 sbi->s_flags = uopt.flags;
2063 sbi->s_uid = uopt.uid;
2064 sbi->s_gid = uopt.gid;
2065 sbi->s_umask = uopt.umask;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01002066 sbi->s_fmode = uopt.fmode;
2067 sbi->s_dmode = uopt.dmode;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002068 sbi->s_nls_map = uopt.nls_map;
Jan Karac03cad22010-10-20 22:17:28 +02002069 rwlock_init(&sbi->s_cred_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002070
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002071 if (uopt.session == 0xFFFFFFFF)
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002072 sbi->s_session = udf_get_last_session(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002073 else
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002074 sbi->s_session = uopt.session;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002075
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002076 udf_debug("Multi-session=%d\n", sbi->s_session);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002077
Linus Torvalds1da177e2005-04-16 15:20:36 -07002078 /* Fill in the rest of the superblock */
2079 sb->s_op = &udf_sb_ops;
Rasmus Rohde221e5832008-04-30 17:22:06 +02002080 sb->s_export_op = &udf_export_ops;
Christoph Hellwig123e9ca2010-05-19 07:16:44 -04002081
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082 sb->s_magic = UDF_SUPER_MAGIC;
2083 sb->s_time_gran = 1000;
2084
Jan Kara403460052009-03-19 16:21:38 +01002085 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
2086 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2087 } else {
Martin K. Petersene1defc42009-05-22 17:17:49 -04002088 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
Jan Kara403460052009-03-19 16:21:38 +01002089 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
Jan Karad759bfa42013-07-25 19:10:59 +02002090 if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
Jan Kara403460052009-03-19 16:21:38 +01002091 if (!silent)
Joe Perches78ace702011-10-10 01:08:05 -07002092 pr_notice("Rescanning with blocksize %d\n",
2093 UDF_DEFAULT_BLOCKSIZE);
Ashish Sangwandc141a42012-07-21 16:35:17 +05302094 brelse(sbi->s_lvid_bh);
2095 sbi->s_lvid_bh = NULL;
Jan Kara403460052009-03-19 16:21:38 +01002096 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
2097 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2098 }
2099 }
Jan Karad759bfa42013-07-25 19:10:59 +02002100 if (ret < 0) {
2101 if (ret == -EAGAIN) {
2102 udf_warn(sb, "No partition found (1)\n");
2103 ret = -EINVAL;
2104 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002105 goto error_out;
2106 }
2107
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002108 udf_debug("Lastblock=%d\n", sbi->s_last_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002109
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002110 if (sbi->s_lvid_bh) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002111 struct logicalVolIntegrityDescImpUse *lvidiu =
Jan Kara69d75672013-09-12 22:00:15 +02002112 udf_sb_lvidiu(sb);
2113 uint16_t minUDFReadRev;
2114 uint16_t minUDFWriteRev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002115
Jan Kara69d75672013-09-12 22:00:15 +02002116 if (!lvidiu) {
2117 ret = -EINVAL;
2118 goto error_out;
2119 }
2120 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2121 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002122 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
Joe Perches78ace702011-10-10 01:08:05 -07002123 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
Jan Kara69d75672013-09-12 22:00:15 +02002124 minUDFReadRev,
Joe Perches78ace702011-10-10 01:08:05 -07002125 UDF_MAX_READ_VERSION);
Jan Karad759bfa42013-07-25 19:10:59 +02002126 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002127 goto error_out;
Jan Karae729eac2013-07-25 16:15:16 +02002128 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2129 !(sb->s_flags & MS_RDONLY)) {
2130 ret = -EACCES;
2131 goto error_out;
2132 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002134 sbi->s_udfrev = minUDFWriteRev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135
2136 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2137 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2138 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2139 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2140 }
2141
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002142 if (!sbi->s_partitions) {
Joe Perches78ace702011-10-10 01:08:05 -07002143 udf_warn(sb, "No partition found (2)\n");
Jan Karad759bfa42013-07-25 19:10:59 +02002144 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145 goto error_out;
2146 }
2147
Marcin Slusarz4b111112008-02-08 04:20:36 -08002148 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
Jan Karae729eac2013-07-25 16:15:16 +02002149 UDF_PART_FLAG_READ_ONLY &&
2150 !(sb->s_flags & MS_RDONLY)) {
2151 ret = -EACCES;
2152 goto error_out;
Peter Osterlundc1a26e72006-10-05 21:17:50 +02002153 }
Eric Sandeen39b3f6d2006-09-29 01:59:41 -07002154
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002155 if (udf_find_fileset(sb, &fileset, &rootdir)) {
Joe Perches78ace702011-10-10 01:08:05 -07002156 udf_warn(sb, "No fileset found\n");
Jan Karad759bfa42013-07-25 19:10:59 +02002157 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158 goto error_out;
2159 }
2160
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002161 if (!silent) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002162 struct timestamp ts;
Marcin Slusarz56774802008-02-10 11:25:31 +01002163 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
Joe Perches78ace702011-10-10 01:08:05 -07002164 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2165 sbi->s_volume_ident,
2166 le16_to_cpu(ts.year), ts.month, ts.day,
Marcin Slusarz56774802008-02-10 11:25:31 +01002167 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002168 }
2169 if (!(sb->s_flags & MS_RDONLY))
2170 udf_open_lvid(sb);
2171
2172 /* Assign the root inode */
2173 /* assign inodes by physical block number */
2174 /* perhaps it's not extensible enough, but for now ... */
Pekka Enberg97e961f2008-10-15 12:29:03 +02002175 inode = udf_iget(sb, &rootdir);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002176 if (!inode) {
Joe Perches78ace702011-10-10 01:08:05 -07002177 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002178 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
Jan Karad759bfa42013-07-25 19:10:59 +02002179 ret = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002180 goto error_out;
2181 }
2182
2183 /* Allocate a dentry for the root inode */
Al Viro48fde702012-01-08 22:15:13 -05002184 sb->s_root = d_make_root(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002185 if (!sb->s_root) {
Joe Perches78ace702011-10-10 01:08:05 -07002186 udf_err(sb, "Couldn't allocate root dentry\n");
Jan Karad759bfa42013-07-25 19:10:59 +02002187 ret = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002188 goto error_out;
2189 }
Jan Kara31170b62007-05-08 00:35:21 -07002190 sb->s_maxbytes = MAX_LFS_FILESIZE;
Al Viro8de52772012-02-06 12:45:27 -05002191 sb->s_max_links = UDF_MAX_LINKS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002192 return 0;
2193
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002194error_out:
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002195 if (sbi->s_vat_inode)
2196 iput(sbi->s_vat_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002197#ifdef CONFIG_UDF_NLS
2198 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002199 unload_nls(sbi->s_nls_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002200#endif
2201 if (!(sb->s_flags & MS_RDONLY))
2202 udf_close_lvid(sb);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002203 brelse(sbi->s_lvid_bh);
Jan Karabff943a2012-06-27 22:27:05 +02002204 udf_sb_free_partitions(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002205 kfree(sbi);
2206 sb->s_fs_info = NULL;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002207
Jan Karad759bfa42013-07-25 19:10:59 +02002208 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209}
2210
Joe Perches8076c362011-10-10 01:08:03 -07002211void _udf_err(struct super_block *sb, const char *function,
2212 const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002213{
Joe Perchesc2bff362011-10-10 01:08:06 -07002214 struct va_format vaf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002215 va_list args;
2216
Linus Torvalds1da177e2005-04-16 15:20:36 -07002217 va_start(args, fmt);
Joe Perchesc2bff362011-10-10 01:08:06 -07002218
2219 vaf.fmt = fmt;
2220 vaf.va = &args;
2221
2222 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2223
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224 va_end(args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225}
2226
Joe Perchesa40ecd72011-10-10 01:08:04 -07002227void _udf_warn(struct super_block *sb, const char *function,
2228 const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229{
Joe Perchesc2bff362011-10-10 01:08:06 -07002230 struct va_format vaf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002231 va_list args;
2232
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002233 va_start(args, fmt);
Joe Perchesc2bff362011-10-10 01:08:06 -07002234
2235 vaf.fmt = fmt;
2236 vaf.va = &args;
2237
2238 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2239
Linus Torvalds1da177e2005-04-16 15:20:36 -07002240 va_end(args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002241}
2242
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002243static void udf_put_super(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002244{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002245 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002246
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002247 sbi = UDF_SB(sb);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +02002248
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002249 if (sbi->s_vat_inode)
2250 iput(sbi->s_vat_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251#ifdef CONFIG_UDF_NLS
2252 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002253 unload_nls(sbi->s_nls_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254#endif
2255 if (!(sb->s_flags & MS_RDONLY))
2256 udf_close_lvid(sb);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002257 brelse(sbi->s_lvid_bh);
Jan Karabff943a2012-06-27 22:27:05 +02002258 udf_sb_free_partitions(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002259 kfree(sb->s_fs_info);
2260 sb->s_fs_info = NULL;
2261}
2262
Jan Kara146bca72009-03-16 18:27:37 +01002263static int udf_sync_fs(struct super_block *sb, int wait)
2264{
2265 struct udf_sb_info *sbi = UDF_SB(sb);
2266
2267 mutex_lock(&sbi->s_alloc_mutex);
2268 if (sbi->s_lvid_dirty) {
2269 /*
2270 * Blockdevice will be synced later so we don't have to submit
2271 * the buffer for IO
2272 */
2273 mark_buffer_dirty(sbi->s_lvid_bh);
Jan Kara146bca72009-03-16 18:27:37 +01002274 sbi->s_lvid_dirty = 0;
2275 }
2276 mutex_unlock(&sbi->s_alloc_mutex);
2277
2278 return 0;
2279}
2280
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002281static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002282{
David Howells726c3342006-06-23 02:02:58 -07002283 struct super_block *sb = dentry->d_sb;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002284 struct udf_sb_info *sbi = UDF_SB(sb);
2285 struct logicalVolIntegrityDescImpUse *lvidiu;
Coly Li557f5a12009-01-20 01:36:55 +08002286 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002287
Jan Kara69d75672013-09-12 22:00:15 +02002288 lvidiu = udf_sb_lvidiu(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002289 buf->f_type = UDF_SUPER_MAGIC;
2290 buf->f_bsize = sb->s_blocksize;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002291 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002292 buf->f_bfree = udf_count_free(sb);
2293 buf->f_bavail = buf->f_bfree;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002294 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2295 le32_to_cpu(lvidiu->numDirs)) : 0)
2296 + buf->f_bfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002297 buf->f_ffree = buf->f_bfree;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002298 buf->f_namelen = UDF_NAME_LEN - 2;
Coly Li557f5a12009-01-20 01:36:55 +08002299 buf->f_fsid.val[0] = (u32)id;
2300 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002301
2302 return 0;
2303}
2304
Marcin Slusarz4b111112008-02-08 04:20:36 -08002305static unsigned int udf_count_free_bitmap(struct super_block *sb,
2306 struct udf_bitmap *bitmap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002307{
2308 struct buffer_head *bh = NULL;
2309 unsigned int accum = 0;
2310 int index;
2311 int block = 0, newblock;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002312 struct kernel_lb_addr loc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002313 uint32_t bytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002314 uint8_t *ptr;
2315 uint16_t ident;
2316 struct spaceBitmapDesc *bm;
2317
Linus Torvalds1da177e2005-04-16 15:20:36 -07002318 loc.logicalBlockNum = bitmap->s_extPosition;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002319 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
Pekka Enberg97e961f2008-10-15 12:29:03 +02002320 bh = udf_read_ptagged(sb, &loc, 0, &ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002321
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002322 if (!bh) {
Joe Perches78ace702011-10-10 01:08:05 -07002323 udf_err(sb, "udf_count_free failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324 goto out;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002325 } else if (ident != TAG_IDENT_SBD) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002326 brelse(bh);
Joe Perches78ace702011-10-10 01:08:05 -07002327 udf_err(sb, "udf_count_free failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002328 goto out;
2329 }
2330
2331 bm = (struct spaceBitmapDesc *)bh->b_data;
2332 bytes = le32_to_cpu(bm->numOfBytes);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002333 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2334 ptr = (uint8_t *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002335
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002336 while (bytes > 0) {
Marcin Slusarz01b954a2008-02-02 22:37:07 +01002337 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2338 accum += bitmap_weight((const unsigned long *)(ptr + index),
2339 cur_bytes * 8);
2340 bytes -= cur_bytes;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002341 if (bytes) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002342 brelse(bh);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002343 newblock = udf_get_lb_pblock(sb, &loc, ++block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002344 bh = udf_tread(sb, newblock);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002345 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002346 udf_debug("read failed\n");
2347 goto out;
2348 }
2349 index = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002350 ptr = (uint8_t *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002351 }
2352 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07002353 brelse(bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002354out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002355 return accum;
2356}
2357
Marcin Slusarz4b111112008-02-08 04:20:36 -08002358static unsigned int udf_count_free_table(struct super_block *sb,
2359 struct inode *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002360{
2361 unsigned int accum = 0;
Jan Karaff116fc2007-05-08 00:35:14 -07002362 uint32_t elen;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002363 struct kernel_lb_addr eloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002364 int8_t etype;
Jan Karaff116fc2007-05-08 00:35:14 -07002365 struct extent_position epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002366
Jan Karad1668fe2010-10-20 23:24:12 +02002367 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
Marcin Slusarzc0b34432008-02-08 04:20:42 -08002368 epos.block = UDF_I(table)->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -07002369 epos.offset = sizeof(struct unallocSpaceEntry);
2370 epos.bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002371
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002372 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002373 accum += (elen >> table->i_sb->s_blocksize_bits);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002374
Jan Kara3bf25cb2007-05-08 00:35:16 -07002375 brelse(epos.bh);
Jan Karad1668fe2010-10-20 23:24:12 +02002376 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002377
2378 return accum;
2379}
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002380
2381static unsigned int udf_count_free(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002382{
2383 unsigned int accum = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002384 struct udf_sb_info *sbi;
2385 struct udf_part_map *map;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002386
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002387 sbi = UDF_SB(sb);
2388 if (sbi->s_lvid_bh) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002389 struct logicalVolIntegrityDesc *lvid =
2390 (struct logicalVolIntegrityDesc *)
2391 sbi->s_lvid_bh->b_data;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002392 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002393 accum = le32_to_cpu(
2394 lvid->freeSpaceTable[sbi->s_partition]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002395 if (accum == 0xFFFFFFFF)
2396 accum = 0;
2397 }
2398 }
2399
2400 if (accum)
2401 return accum;
2402
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002403 map = &sbi->s_partmaps[sbi->s_partition];
2404 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002405 accum += udf_count_free_bitmap(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002406 map->s_uspace.s_bitmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002407 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002408 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002409 accum += udf_count_free_bitmap(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002410 map->s_fspace.s_bitmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002411 }
2412 if (accum)
2413 return accum;
2414
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002415 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002416 accum += udf_count_free_table(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002417 map->s_uspace.s_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002419 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002420 accum += udf_count_free_table(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002421 map->s_fspace.s_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002422 }
2423
2424 return accum;
2425}