blob: 5e2c8c814e1bda634c54ade051bd0143e20d553a [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/vfs.h>
52#include <linux/vmalloc.h>
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -080053#include <linux/errno.h>
Miklos Szeredi6da80892008-02-08 04:21:50 -080054#include <linux/mount.h>
55#include <linux/seq_file.h>
Marcin Slusarz01b954a2008-02-02 22:37:07 +010056#include <linux/bitmap.h>
Bob Copelandf845fce2008-04-17 09:47:48 +020057#include <linux/crc-itu-t.h>
Jan Kara1df2ae32012-06-27 21:23:07 +020058#include <linux/log2.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#include <asm/byteorder.h>
60
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#include "udf_sb.h"
62#include "udf_i.h"
63
64#include <linux/init.h>
Fabian Fredericke9736062014-06-18 19:38:24 +020065#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
67#define VDS_POS_PRIMARY_VOL_DESC 0
68#define VDS_POS_UNALLOC_SPACE_DESC 1
69#define VDS_POS_LOGICAL_VOL_DESC 2
70#define VDS_POS_PARTITION_DESC 3
71#define VDS_POS_IMP_USE_VOL_DESC 4
72#define VDS_POS_VOL_DESC_PTR 5
73#define VDS_POS_TERMINATING_DESC 6
74#define VDS_POS_LENGTH 7
75
Miklos Szeredi6da80892008-02-08 04:21:50 -080076#define UDF_DEFAULT_BLOCKSIZE 2048
77
Peter A. Felvegi44499602013-10-18 20:07:44 +020078#define VSD_FIRST_SECTOR_OFFSET 32768
79#define VSD_MAX_SECTOR_OFFSET 0x800000
80
Alden Tondettara47241c2016-04-25 19:27:56 -070081/*
82 * Maximum number of Terminating Descriptor / Logical Volume Integrity
83 * Descriptor redirections. The chosen numbers are arbitrary - just that we
84 * hopefully don't limit any real use of rewritten inode on write-once media
85 * but avoid looping for too long on corrupted media.
86 */
87#define UDF_MAX_TD_NESTING 64
88#define UDF_MAX_LVID_NESTING 1000
89
Al Viro8de52772012-02-06 12:45:27 -050090enum { UDF_MAX_LINKS = 0xffff };
91
Linus Torvalds1da177e2005-04-16 15:20:36 -070092/* These are the "meat" - everything else is stuffing */
93static int udf_fill_super(struct super_block *, void *, int);
94static void udf_put_super(struct super_block *);
Jan Kara146bca72009-03-16 18:27:37 +010095static int udf_sync_fs(struct super_block *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096static int udf_remount_fs(struct super_block *, int *, char *);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020097static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020098static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
99 struct kernel_lb_addr *);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700100static void udf_load_fileset(struct super_block *, struct buffer_head *,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200101 struct kernel_lb_addr *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102static void udf_open_lvid(struct super_block *);
103static void udf_close_lvid(struct super_block *);
104static unsigned int udf_count_free(struct super_block *);
David Howells726c3342006-06-23 02:02:58 -0700105static int udf_statfs(struct dentry *, struct kstatfs *);
Al Viro34c80b12011-12-08 21:32:45 -0500106static int udf_show_options(struct seq_file *, struct dentry *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
Jan Kara69d75672013-09-12 22:00:15 +0200108struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800109{
Jan Kara69d75672013-09-12 22:00:15 +0200110 struct logicalVolIntegrityDesc *lvid;
111 unsigned int partnum;
112 unsigned int offset;
113
114 if (!UDF_SB(sb)->s_lvid_bh)
115 return NULL;
116 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
117 partnum = le32_to_cpu(lvid->numOfPartitions);
118 if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
119 offsetof(struct logicalVolIntegrityDesc, impUse)) /
120 (2 * sizeof(uint32_t)) < partnum) {
121 udf_err(sb, "Logical volume integrity descriptor corrupted "
122 "(numOfPartitions = %u)!\n", partnum);
123 return NULL;
124 }
125 /* The offset is to skip freeSpaceTable and sizeTable arrays */
126 offset = partnum * 2 * sizeof(uint32_t);
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800127 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
128}
129
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130/* UDF filesystem type */
Al Viro152a0832010-07-25 00:46:55 +0400131static struct dentry *udf_mount(struct file_system_type *fs_type,
132 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133{
Al Viro152a0832010-07-25 00:46:55 +0400134 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135}
136
137static struct file_system_type udf_fstype = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700138 .owner = THIS_MODULE,
139 .name = "udf",
Al Viro152a0832010-07-25 00:46:55 +0400140 .mount = udf_mount,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700141 .kill_sb = kill_block_super,
142 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143};
Eric W. Biederman3e64fe52013-03-11 07:05:42 -0700144MODULE_ALIAS_FS("udf");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700146static struct kmem_cache *udf_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
148static struct inode *udf_alloc_inode(struct super_block *sb)
149{
150 struct udf_inode_info *ei;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800151 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 if (!ei)
153 return NULL;
Dan Bastone95f87972006-08-13 23:24:18 -0700154
155 ei->i_unique = 0;
156 ei->i_lenExtents = 0;
157 ei->i_next_alloc_block = 0;
158 ei->i_next_alloc_goal = 0;
159 ei->i_strat4096 = 0;
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100160 init_rwsem(&ei->i_data_sem);
Namjae Jeon99600052013-01-19 11:17:14 +0900161 ei->cached_extent.lstart = -1;
162 spin_lock_init(&ei->i_extent_cache_lock);
Dan Bastone95f87972006-08-13 23:24:18 -0700163
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 return &ei->vfs_inode;
165}
166
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100167static void udf_i_callback(struct rcu_head *head)
168{
169 struct inode *inode = container_of(head, struct inode, i_rcu);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100170 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
171}
172
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173static void udf_destroy_inode(struct inode *inode)
174{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100175 call_rcu(&inode->i_rcu, udf_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176}
177
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700178static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700180 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
Christoph Lametera35afb82007-05-16 22:10:57 -0700182 ei->i_ext.i_data = NULL;
183 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184}
185
Fabian Frederick53ea18d2014-02-01 15:45:18 +0800186static int __init init_inodecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187{
188 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
189 sizeof(struct udf_inode_info),
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700190 0, (SLAB_RECLAIM_ACCOUNT |
Vladimir Davydov5d097052016-01-14 15:18:21 -0800191 SLAB_MEM_SPREAD |
192 SLAB_ACCOUNT),
Paul Mundt20c2df82007-07-20 10:11:58 +0900193 init_once);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700194 if (!udf_inode_cachep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 return -ENOMEM;
196 return 0;
197}
198
199static void destroy_inodecache(void)
200{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +1000201 /*
202 * Make sure all delayed rcu free inodes are flushed before we
203 * destroy cache.
204 */
205 rcu_barrier();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700206 kmem_cache_destroy(udf_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207}
208
209/* Superblock operations */
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800210static const struct super_operations udf_sb_ops = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700211 .alloc_inode = udf_alloc_inode,
212 .destroy_inode = udf_destroy_inode,
213 .write_inode = udf_write_inode,
Al Viro3aac2b622010-06-07 00:43:39 -0400214 .evict_inode = udf_evict_inode,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700215 .put_super = udf_put_super,
Jan Kara146bca72009-03-16 18:27:37 +0100216 .sync_fs = udf_sync_fs,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700217 .statfs = udf_statfs,
218 .remount_fs = udf_remount_fs,
Miklos Szeredi6da80892008-02-08 04:21:50 -0800219 .show_options = udf_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220};
221
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700222struct udf_options {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 unsigned char novrs;
224 unsigned int blocksize;
225 unsigned int session;
226 unsigned int lastblock;
227 unsigned int anchor;
228 unsigned int volume;
229 unsigned short partition;
230 unsigned int fileset;
231 unsigned int rootdir;
232 unsigned int flags;
Al Virofaa17292011-07-26 03:18:29 -0400233 umode_t umask;
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -0800234 kgid_t gid;
235 kuid_t uid;
Al Virofaa17292011-07-26 03:18:29 -0400236 umode_t fmode;
237 umode_t dmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 struct nls_table *nls_map;
239};
240
241static int __init init_udf_fs(void)
242{
243 int err;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700244
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 err = init_inodecache();
246 if (err)
247 goto out1;
248 err = register_filesystem(&udf_fstype);
249 if (err)
250 goto out;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700251
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 return 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700253
254out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 destroy_inodecache();
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700256
257out1:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 return err;
259}
260
261static void __exit exit_udf_fs(void)
262{
263 unregister_filesystem(&udf_fstype);
264 destroy_inodecache();
265}
266
267module_init(init_udf_fs)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700268module_exit(exit_udf_fs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -0800270static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
271{
272 struct udf_sb_info *sbi = UDF_SB(sb);
273
274 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
275 GFP_KERNEL);
276 if (!sbi->s_partmaps) {
Joe Perches8076c362011-10-10 01:08:03 -0700277 udf_err(sb, "Unable to allocate space for %d partition maps\n",
278 count);
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -0800279 sbi->s_partitions = 0;
280 return -ENOMEM;
281 }
282
283 sbi->s_partitions = count;
284 return 0;
285}
286
Jan Karabff943a2012-06-27 22:27:05 +0200287static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
288{
289 int i;
290 int nr_groups = bitmap->s_nr_groups;
Jan Karabff943a2012-06-27 22:27:05 +0200291
292 for (i = 0; i < nr_groups; i++)
293 if (bitmap->s_block_bitmap[i])
294 brelse(bitmap->s_block_bitmap[i]);
295
Tetsuo Handa1d5cfdb2016-01-22 15:11:02 -0800296 kvfree(bitmap);
Jan Karabff943a2012-06-27 22:27:05 +0200297}
298
299static void udf_free_partition(struct udf_part_map *map)
300{
301 int i;
302 struct udf_meta_data *mdata;
303
304 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
305 iput(map->s_uspace.s_table);
306 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
307 iput(map->s_fspace.s_table);
308 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
309 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
310 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
311 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
312 if (map->s_partition_type == UDF_SPARABLE_MAP15)
313 for (i = 0; i < 4; i++)
314 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
315 else if (map->s_partition_type == UDF_METADATA_MAP25) {
316 mdata = &map->s_type_specific.s_metadata;
317 iput(mdata->s_metadata_fe);
318 mdata->s_metadata_fe = NULL;
319
320 iput(mdata->s_mirror_fe);
321 mdata->s_mirror_fe = NULL;
322
323 iput(mdata->s_bitmap_fe);
324 mdata->s_bitmap_fe = NULL;
325 }
326}
327
328static void udf_sb_free_partitions(struct super_block *sb)
329{
330 struct udf_sb_info *sbi = UDF_SB(sb);
331 int i;
Namjae Jeon1b1baff2013-01-14 22:53:47 +0100332 if (sbi->s_partmaps == NULL)
333 return;
Jan Karabff943a2012-06-27 22:27:05 +0200334 for (i = 0; i < sbi->s_partitions; i++)
335 udf_free_partition(&sbi->s_partmaps[i]);
336 kfree(sbi->s_partmaps);
337 sbi->s_partmaps = NULL;
338}
339
Al Viro34c80b12011-12-08 21:32:45 -0500340static int udf_show_options(struct seq_file *seq, struct dentry *root)
Miklos Szeredi6da80892008-02-08 04:21:50 -0800341{
Al Viro34c80b12011-12-08 21:32:45 -0500342 struct super_block *sb = root->d_sb;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800343 struct udf_sb_info *sbi = UDF_SB(sb);
344
345 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
346 seq_puts(seq, ",nostrict");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +0100347 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
Miklos Szeredi6da80892008-02-08 04:21:50 -0800348 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
349 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
350 seq_puts(seq, ",unhide");
351 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
352 seq_puts(seq, ",undelete");
353 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
354 seq_puts(seq, ",noadinicb");
355 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
356 seq_puts(seq, ",shortad");
357 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
358 seq_puts(seq, ",uid=forget");
359 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
360 seq_puts(seq, ",uid=ignore");
361 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
362 seq_puts(seq, ",gid=forget");
363 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
364 seq_puts(seq, ",gid=ignore");
365 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -0800366 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
Miklos Szeredi6da80892008-02-08 04:21:50 -0800367 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -0800368 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
Miklos Szeredi6da80892008-02-08 04:21:50 -0800369 if (sbi->s_umask != 0)
Al Virofaa17292011-07-26 03:18:29 -0400370 seq_printf(seq, ",umask=%ho", sbi->s_umask);
Marcin Slusarz87bc7302008-12-02 13:40:11 +0100371 if (sbi->s_fmode != UDF_INVALID_MODE)
Al Virofaa17292011-07-26 03:18:29 -0400372 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
Marcin Slusarz87bc7302008-12-02 13:40:11 +0100373 if (sbi->s_dmode != UDF_INVALID_MODE)
Al Virofaa17292011-07-26 03:18:29 -0400374 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
Miklos Szeredi6da80892008-02-08 04:21:50 -0800375 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
376 seq_printf(seq, ",session=%u", sbi->s_session);
377 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
378 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
Jan Kara403460052009-03-19 16:21:38 +0100379 if (sbi->s_anchor != 0)
380 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
Miklos Szeredi6da80892008-02-08 04:21:50 -0800381 /*
382 * volume, partition, fileset and rootdir seem to be ignored
383 * currently
384 */
385 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
386 seq_puts(seq, ",utf8");
387 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
388 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
389
390 return 0;
391}
392
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393/*
394 * udf_parse_options
395 *
396 * PURPOSE
397 * Parse mount options.
398 *
399 * DESCRIPTION
400 * The following mount options are supported:
401 *
402 * gid= Set the default group.
403 * umask= Set the default umask.
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100404 * mode= Set the default file permissions.
405 * dmode= Set the default directory permissions.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 * uid= Set the default user.
407 * bs= Set the block size.
408 * unhide Show otherwise hidden files.
409 * undelete Show deleted files in lists.
410 * adinicb Embed data in the inode (default)
411 * noadinicb Don't embed data in the inode
412 * shortad Use short ad's
413 * longad Use long ad's (default)
414 * nostrict Unset strict conformance
415 * iocharset= Set the NLS character set
416 *
417 * The remaining are for debugging and disaster recovery:
418 *
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700419 * novrs Skip volume sequence recognition
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 *
421 * The following expect a offset from 0.
422 *
423 * session= Set the CDROM session (default= last session)
424 * anchor= Override standard anchor location. (default= 256)
425 * volume= Override the VolumeDesc location. (unused)
426 * partition= Override the PartitionDesc location. (unused)
427 * lastblock= Set the last block of the filesystem/
428 *
429 * The following expect a offset from the partition root.
430 *
431 * fileset= Override the fileset block location. (unused)
432 * rootdir= Override the root directory location. (unused)
433 * WARNING: overriding the rootdir to a non-directory may
434 * yield highly unpredictable results.
435 *
436 * PRE-CONDITIONS
437 * options Pointer to mount options string.
438 * uopts Pointer to mount options variable.
439 *
440 * POST-CONDITIONS
441 * <return> 1 Mount options parsed okay.
442 * <return> 0 Error parsing mount options.
443 *
444 * HISTORY
445 * July 1, 1997 - Andrew E. Mileski
446 * Written, tested, and released.
447 */
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700448
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449enum {
450 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
451 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
452 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
453 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
454 Opt_rootdir, Opt_utf8, Opt_iocharset,
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100455 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
456 Opt_fmode, Opt_dmode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457};
458
Steven Whitehousea447c092008-10-13 10:46:57 +0100459static const match_table_t tokens = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700460 {Opt_novrs, "novrs"},
461 {Opt_nostrict, "nostrict"},
462 {Opt_bs, "bs=%u"},
463 {Opt_unhide, "unhide"},
464 {Opt_undelete, "undelete"},
465 {Opt_noadinicb, "noadinicb"},
466 {Opt_adinicb, "adinicb"},
467 {Opt_shortad, "shortad"},
468 {Opt_longad, "longad"},
469 {Opt_uforget, "uid=forget"},
470 {Opt_uignore, "uid=ignore"},
471 {Opt_gforget, "gid=forget"},
472 {Opt_gignore, "gid=ignore"},
473 {Opt_gid, "gid=%u"},
474 {Opt_uid, "uid=%u"},
475 {Opt_umask, "umask=%o"},
476 {Opt_session, "session=%u"},
477 {Opt_lastblock, "lastblock=%u"},
478 {Opt_anchor, "anchor=%u"},
479 {Opt_volume, "volume=%u"},
480 {Opt_partition, "partition=%u"},
481 {Opt_fileset, "fileset=%u"},
482 {Opt_rootdir, "rootdir=%u"},
483 {Opt_utf8, "utf8"},
484 {Opt_iocharset, "iocharset=%s"},
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100485 {Opt_fmode, "mode=%o"},
486 {Opt_dmode, "dmode=%o"},
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700487 {Opt_err, NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488};
489
Miklos Szeredi6da80892008-02-08 04:21:50 -0800490static int udf_parse_options(char *options, struct udf_options *uopt,
491 bool remount)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492{
493 char *p;
494 int option;
495
496 uopt->novrs = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 uopt->partition = 0xFFFF;
498 uopt->session = 0xFFFFFFFF;
499 uopt->lastblock = 0;
500 uopt->anchor = 0;
501 uopt->volume = 0xFFFFFFFF;
502 uopt->rootdir = 0xFFFFFFFF;
503 uopt->fileset = 0xFFFFFFFF;
504 uopt->nls_map = NULL;
505
506 if (!options)
507 return 1;
508
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700509 while ((p = strsep(&options, ",")) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 substring_t args[MAX_OPT_ARGS];
511 int token;
Fabian Frederick8c6915a2014-01-29 17:13:16 +0800512 unsigned n;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 if (!*p)
514 continue;
515
516 token = match_token(p, tokens, args);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700517 switch (token) {
518 case Opt_novrs:
519 uopt->novrs = 1;
Clemens Ladisch41368012009-03-06 09:16:49 +0100520 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700521 case Opt_bs:
522 if (match_int(&args[0], &option))
523 return 0;
Fabian Frederick8c6915a2014-01-29 17:13:16 +0800524 n = option;
525 if (n != 512 && n != 1024 && n != 2048 && n != 4096)
526 return 0;
527 uopt->blocksize = n;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +0100528 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700529 break;
530 case Opt_unhide:
531 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
532 break;
533 case Opt_undelete:
534 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
535 break;
536 case Opt_noadinicb:
537 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
538 break;
539 case Opt_adinicb:
540 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
541 break;
542 case Opt_shortad:
543 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
544 break;
545 case Opt_longad:
546 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
547 break;
548 case Opt_gid:
549 if (match_int(args, &option))
550 return 0;
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -0800551 uopt->gid = make_kgid(current_user_ns(), option);
552 if (!gid_valid(uopt->gid))
553 return 0;
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -0700554 uopt->flags |= (1 << UDF_FLAG_GID_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700555 break;
556 case Opt_uid:
557 if (match_int(args, &option))
558 return 0;
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -0800559 uopt->uid = make_kuid(current_user_ns(), option);
560 if (!uid_valid(uopt->uid))
561 return 0;
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -0700562 uopt->flags |= (1 << UDF_FLAG_UID_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700563 break;
564 case Opt_umask:
565 if (match_octal(args, &option))
566 return 0;
567 uopt->umask = option;
568 break;
569 case Opt_nostrict:
570 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
571 break;
572 case Opt_session:
573 if (match_int(args, &option))
574 return 0;
575 uopt->session = option;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800576 if (!remount)
577 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700578 break;
579 case Opt_lastblock:
580 if (match_int(args, &option))
581 return 0;
582 uopt->lastblock = option;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800583 if (!remount)
584 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700585 break;
586 case Opt_anchor:
587 if (match_int(args, &option))
588 return 0;
589 uopt->anchor = option;
590 break;
591 case Opt_volume:
592 if (match_int(args, &option))
593 return 0;
594 uopt->volume = option;
595 break;
596 case Opt_partition:
597 if (match_int(args, &option))
598 return 0;
599 uopt->partition = option;
600 break;
601 case Opt_fileset:
602 if (match_int(args, &option))
603 return 0;
604 uopt->fileset = option;
605 break;
606 case Opt_rootdir:
607 if (match_int(args, &option))
608 return 0;
609 uopt->rootdir = option;
610 break;
611 case Opt_utf8:
612 uopt->flags |= (1 << UDF_FLAG_UTF8);
613 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614#ifdef CONFIG_UDF_NLS
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700615 case Opt_iocharset:
616 uopt->nls_map = load_nls(args[0].from);
617 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
618 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619#endif
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700620 case Opt_uignore:
621 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
622 break;
623 case Opt_uforget:
624 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
625 break;
626 case Opt_gignore:
627 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
628 break;
629 case Opt_gforget:
630 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
631 break;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100632 case Opt_fmode:
633 if (match_octal(args, &option))
634 return 0;
635 uopt->fmode = option & 0777;
636 break;
637 case Opt_dmode:
638 if (match_octal(args, &option))
639 return 0;
640 uopt->dmode = option & 0777;
641 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700642 default:
Joe Perches78ace702011-10-10 01:08:05 -0700643 pr_err("bad mount option \"%s\" or missing value\n", p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 return 0;
645 }
646 }
647 return 1;
648}
649
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700650static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651{
652 struct udf_options uopt;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800653 struct udf_sb_info *sbi = UDF_SB(sb);
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400654 int error = 0;
Jan Kara69d75672013-09-12 22:00:15 +0200655 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656
Theodore Ts'o02b99842014-03-13 10:14:33 -0400657 sync_filesystem(sb);
Jan Kara69d75672013-09-12 22:00:15 +0200658 if (lvidiu) {
659 int write_rev = le16_to_cpu(lvidiu->minUDFWriteRev);
Jan Karae729eac2013-07-25 16:15:16 +0200660 if (write_rev > UDF_MAX_WRITE_VERSION && !(*flags & MS_RDONLY))
661 return -EACCES;
662 }
663
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800664 uopt.flags = sbi->s_flags;
665 uopt.uid = sbi->s_uid;
666 uopt.gid = sbi->s_gid;
667 uopt.umask = sbi->s_umask;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100668 uopt.fmode = sbi->s_fmode;
669 uopt.dmode = sbi->s_dmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670
Miklos Szeredi6da80892008-02-08 04:21:50 -0800671 if (!udf_parse_options(options, &uopt, true))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 return -EINVAL;
673
Jan Karac03cad22010-10-20 22:17:28 +0200674 write_lock(&sbi->s_cred_lock);
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800675 sbi->s_flags = uopt.flags;
676 sbi->s_uid = uopt.uid;
677 sbi->s_gid = uopt.gid;
678 sbi->s_umask = uopt.umask;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100679 sbi->s_fmode = uopt.fmode;
680 sbi->s_dmode = uopt.dmode;
Jan Karac03cad22010-10-20 22:17:28 +0200681 write_unlock(&sbi->s_cred_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400683 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
684 goto out_unlock;
685
Jan Kara36350462010-05-19 16:28:56 +0200686 if (*flags & MS_RDONLY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 udf_close_lvid(sb);
Jan Kara36350462010-05-19 16:28:56 +0200688 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 udf_open_lvid(sb);
690
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400691out_unlock:
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400692 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693}
694
Jan Kara403460052009-03-19 16:21:38 +0100695/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
696/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
697static loff_t udf_check_vsd(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698{
699 struct volStructDesc *vsd = NULL;
Peter A. Felvegi44499602013-10-18 20:07:44 +0200700 loff_t sector = VSD_FIRST_SECTOR_OFFSET;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 int sectorsize;
702 struct buffer_head *bh = NULL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700703 int nsr02 = 0;
704 int nsr03 = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800705 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800707 sbi = UDF_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 if (sb->s_blocksize < sizeof(struct volStructDesc))
709 sectorsize = sizeof(struct volStructDesc);
710 else
711 sectorsize = sb->s_blocksize;
712
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800713 sector += (sbi->s_session << sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714
715 udf_debug("Starting at sector %u (%ld byte sectors)\n",
Sebastian Manciulea706047a2008-04-14 17:13:01 +0200716 (unsigned int)(sector >> sb->s_blocksize_bits),
717 sb->s_blocksize);
Peter A. Felvegi44499602013-10-18 20:07:44 +0200718 /* Process the sequence (if applicable). The hard limit on the sector
719 * offset is arbitrary, hopefully large enough so that all valid UDF
720 * filesystems will be recognised. There is no mention of an upper
721 * bound to the size of the volume recognition area in the standard.
722 * The limit will prevent the code to read all the sectors of a
723 * specially crafted image (like a bluray disc full of CD001 sectors),
724 * potentially causing minutes or even hours of uninterruptible I/O
725 * activity. This actually happened with uninitialised SSD partitions
726 * (all 0xFF) before the check for the limit and all valid IDs were
727 * added */
728 for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET;
729 sector += sectorsize) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 /* Read a block */
731 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
732 if (!bh)
733 break;
734
735 /* Look for ISO descriptors */
736 vsd = (struct volStructDesc *)(bh->b_data +
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800737 (sector & (sb->s_blocksize - 1)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738
Peter A. Felvegi44499602013-10-18 20:07:44 +0200739 if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800740 VSD_STD_ID_LEN)) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700741 switch (vsd->structType) {
742 case 0:
743 udf_debug("ISO9660 Boot Record found\n");
744 break;
745 case 1:
Joe Perchesa983f362011-10-10 01:08:07 -0700746 udf_debug("ISO9660 Primary Volume Descriptor found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700747 break;
748 case 2:
Joe Perchesa983f362011-10-10 01:08:07 -0700749 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700750 break;
751 case 3:
Joe Perchesa983f362011-10-10 01:08:07 -0700752 udf_debug("ISO9660 Volume Partition Descriptor found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700753 break;
754 case 255:
Joe Perchesa983f362011-10-10 01:08:07 -0700755 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700756 break;
757 default:
758 udf_debug("ISO9660 VRS (%u) found\n",
759 vsd->structType);
760 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 }
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800762 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
763 VSD_STD_ID_LEN))
764 ; /* nothing */
765 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
766 VSD_STD_ID_LEN)) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700767 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 break;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800769 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
770 VSD_STD_ID_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 nsr02 = sector;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800772 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
773 VSD_STD_ID_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 nsr03 = sector;
Peter A. Felvegi44499602013-10-18 20:07:44 +0200775 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2,
776 VSD_STD_ID_LEN))
777 ; /* nothing */
778 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02,
779 VSD_STD_ID_LEN))
780 ; /* nothing */
781 else {
782 /* invalid id : end of volume recognition area */
783 brelse(bh);
784 break;
785 }
Jan Kara3bf25cb2007-05-08 00:35:16 -0700786 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 }
788
789 if (nsr03)
790 return nsr03;
791 else if (nsr02)
792 return nsr02;
Peter A. Felvegi44499602013-10-18 20:07:44 +0200793 else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) ==
794 VSD_FIRST_SECTOR_OFFSET)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 return -1;
796 else
797 return 0;
798}
799
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800800static int udf_find_fileset(struct super_block *sb,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200801 struct kernel_lb_addr *fileset,
802 struct kernel_lb_addr *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803{
804 struct buffer_head *bh = NULL;
805 long lastblock;
806 uint16_t ident;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800807 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
809 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700810 fileset->partitionReferenceNum != 0xFFFF) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200811 bh = udf_read_ptagged(sb, fileset, 0, &ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700813 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 return 1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700815 } else if (ident != TAG_IDENT_FSD) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700816 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 return 1;
818 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700819
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 }
821
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800822 sbi = UDF_SB(sb);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800823 if (!bh) {
824 /* Search backwards through the partitions */
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200825 struct kernel_lb_addr newfileset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700827/* --> cvg: FIXME - is it reasonable? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 return 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700829
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800830 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700831 (newfileset.partitionReferenceNum != 0xFFFF &&
832 fileset->logicalBlockNum == 0xFFFFFFFF &&
833 fileset->partitionReferenceNum == 0xFFFF);
834 newfileset.partitionReferenceNum--) {
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800835 lastblock = sbi->s_partmaps
836 [newfileset.partitionReferenceNum]
837 .s_partition_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 newfileset.logicalBlockNum = 0;
839
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700840 do {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200841 bh = udf_read_ptagged(sb, &newfileset, 0,
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800842 &ident);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700843 if (!bh) {
844 newfileset.logicalBlockNum++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 continue;
846 }
847
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700848 switch (ident) {
849 case TAG_IDENT_SBD:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700850 {
851 struct spaceBitmapDesc *sp;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800852 sp = (struct spaceBitmapDesc *)
853 bh->b_data;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700854 newfileset.logicalBlockNum += 1 +
855 ((le32_to_cpu(sp->numOfBytes) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800856 sizeof(struct spaceBitmapDesc)
857 - 1) >> sb->s_blocksize_bits);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700858 brelse(bh);
859 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700861 case TAG_IDENT_FSD:
862 *fileset = newfileset;
863 break;
864 default:
865 newfileset.logicalBlockNum++;
866 brelse(bh);
867 bh = NULL;
868 break;
869 }
870 } while (newfileset.logicalBlockNum < lastblock &&
871 fileset->logicalBlockNum == 0xFFFFFFFF &&
872 fileset->partitionReferenceNum == 0xFFFF);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 }
874 }
875
876 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700877 fileset->partitionReferenceNum != 0xFFFF) && bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 udf_debug("Fileset at block=%d, partition=%d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700879 fileset->logicalBlockNum,
880 fileset->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800882 sbi->s_partition = fileset->partitionReferenceNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 udf_load_fileset(sb, bh, root);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700884 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885 return 0;
886 }
887 return 1;
888}
889
Jan Karad759bfa42013-07-25 19:10:59 +0200890/*
891 * Load primary Volume Descriptor Sequence
892 *
893 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
894 * should be tried.
895 */
Jan Karac0eb31e2008-04-01 16:50:35 +0200896static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897{
898 struct primaryVolDesc *pvoldesc;
Andrew Gabbasov9293fcf2016-01-15 02:44:22 -0600899 uint8_t *outstr;
Jan Karac0eb31e2008-04-01 16:50:35 +0200900 struct buffer_head *bh;
901 uint16_t ident;
Jan Karad759bfa42013-07-25 19:10:59 +0200902 int ret = -ENOMEM;
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100903
Andrew Gabbasov9293fcf2016-01-15 02:44:22 -0600904 outstr = kmalloc(128, GFP_NOFS);
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100905 if (!outstr)
Andrew Gabbasov9293fcf2016-01-15 02:44:22 -0600906 return -ENOMEM;
Jan Karac0eb31e2008-04-01 16:50:35 +0200907
908 bh = udf_read_tagged(sb, block, block, &ident);
Jan Karad759bfa42013-07-25 19:10:59 +0200909 if (!bh) {
910 ret = -EAGAIN;
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100911 goto out2;
Jan Karad759bfa42013-07-25 19:10:59 +0200912 }
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100913
Jan Karad759bfa42013-07-25 19:10:59 +0200914 if (ident != TAG_IDENT_PVD) {
915 ret = -EIO;
916 goto out_bh;
917 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918
919 pvoldesc = (struct primaryVolDesc *)bh->b_data;
920
Marcin Slusarz56774802008-02-10 11:25:31 +0100921 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
922 pvoldesc->recordingDateAndTime)) {
Marcin Slusarzaf15a292008-02-10 11:29:10 +0100923#ifdef UDFFS_DEBUG
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200924 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
Joe Perchesa983f362011-10-10 01:08:07 -0700925 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
Marcin Slusarzaf15a292008-02-10 11:29:10 +0100926 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
927 ts->minute, le16_to_cpu(ts->typeAndTimezone));
928#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 }
930
Andrew Gabbasovc26f6c62016-04-25 06:19:38 -0500931 ret = udf_dstrCS0toUTF8(outstr, 31, pvoldesc->volIdent, 32);
Andrew Gabbasov9293fcf2016-01-15 02:44:22 -0600932 if (ret < 0)
933 goto out_bh;
Fabian Fredericke9d4cf412015-04-08 21:23:54 +0200934
Andrew Gabbasov9293fcf2016-01-15 02:44:22 -0600935 strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret);
936 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937
Andrew Gabbasovc26f6c62016-04-25 06:19:38 -0500938 ret = udf_dstrCS0toUTF8(outstr, 127, pvoldesc->volSetIdent, 128);
Andrew Gabbasov9293fcf2016-01-15 02:44:22 -0600939 if (ret < 0)
940 goto out_bh;
Fabian Fredericke9d4cf412015-04-08 21:23:54 +0200941
Andrew Gabbasov9293fcf2016-01-15 02:44:22 -0600942 outstr[ret] = 0;
943 udf_debug("volSetIdent[] = '%s'\n", outstr);
Jan Karac0eb31e2008-04-01 16:50:35 +0200944
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100945 ret = 0;
Jan Karad759bfa42013-07-25 19:10:59 +0200946out_bh:
947 brelse(bh);
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100948out2:
949 kfree(outstr);
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100950 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951}
952
Namjae Jeon3080a742011-10-23 19:28:32 +0900953struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
954 u32 meta_file_loc, u32 partition_num)
955{
956 struct kernel_lb_addr addr;
957 struct inode *metadata_fe;
958
959 addr.logicalBlockNum = meta_file_loc;
960 addr.partitionReferenceNum = partition_num;
961
Jan Kara6174c2e2014-10-09 12:52:16 +0200962 metadata_fe = udf_iget_special(sb, &addr);
Namjae Jeon3080a742011-10-23 19:28:32 +0900963
Jan Kara6d3d5e82014-09-04 16:15:51 +0200964 if (IS_ERR(metadata_fe)) {
Namjae Jeon3080a742011-10-23 19:28:32 +0900965 udf_warn(sb, "metadata inode efe not found\n");
Jan Kara6d3d5e82014-09-04 16:15:51 +0200966 return metadata_fe;
967 }
968 if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
Namjae Jeon3080a742011-10-23 19:28:32 +0900969 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
970 iput(metadata_fe);
Jan Kara6d3d5e82014-09-04 16:15:51 +0200971 return ERR_PTR(-EIO);
Namjae Jeon3080a742011-10-23 19:28:32 +0900972 }
973
974 return metadata_fe;
975}
976
Jan Karabfb257a2008-04-08 20:37:21 +0200977static int udf_load_metadata_files(struct super_block *sb, int partition)
978{
979 struct udf_sb_info *sbi = UDF_SB(sb);
980 struct udf_part_map *map;
981 struct udf_meta_data *mdata;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200982 struct kernel_lb_addr addr;
Jan Kara6d3d5e82014-09-04 16:15:51 +0200983 struct inode *fe;
Jan Karabfb257a2008-04-08 20:37:21 +0200984
985 map = &sbi->s_partmaps[partition];
986 mdata = &map->s_type_specific.s_metadata;
987
988 /* metadata address */
Jan Karabfb257a2008-04-08 20:37:21 +0200989 udf_debug("Metadata file location: block = %d part = %d\n",
Namjae Jeon3080a742011-10-23 19:28:32 +0900990 mdata->s_meta_file_loc, map->s_partition_num);
Jan Karabfb257a2008-04-08 20:37:21 +0200991
Jan Kara6d3d5e82014-09-04 16:15:51 +0200992 fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc,
993 map->s_partition_num);
994 if (IS_ERR(fe)) {
Namjae Jeon3080a742011-10-23 19:28:32 +0900995 /* mirror file entry */
996 udf_debug("Mirror metadata file location: block = %d part = %d\n",
997 mdata->s_mirror_file_loc, map->s_partition_num);
Jan Karabfb257a2008-04-08 20:37:21 +0200998
Jan Kara6d3d5e82014-09-04 16:15:51 +0200999 fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc,
1000 map->s_partition_num);
Jan Karabfb257a2008-04-08 20:37:21 +02001001
Jan Kara6d3d5e82014-09-04 16:15:51 +02001002 if (IS_ERR(fe)) {
Namjae Jeon3080a742011-10-23 19:28:32 +09001003 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
Jan Kara6d3d5e82014-09-04 16:15:51 +02001004 return PTR_ERR(fe);
Namjae Jeon3080a742011-10-23 19:28:32 +09001005 }
Jan Kara6d3d5e82014-09-04 16:15:51 +02001006 mdata->s_mirror_fe = fe;
1007 } else
1008 mdata->s_metadata_fe = fe;
1009
Jan Karabfb257a2008-04-08 20:37:21 +02001010
1011 /*
1012 * bitmap file entry
1013 * Note:
1014 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
1015 */
1016 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
1017 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
1018 addr.partitionReferenceNum = map->s_partition_num;
1019
1020 udf_debug("Bitmap file location: block = %d part = %d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001021 addr.logicalBlockNum, addr.partitionReferenceNum);
Jan Karabfb257a2008-04-08 20:37:21 +02001022
Jan Kara6174c2e2014-10-09 12:52:16 +02001023 fe = udf_iget_special(sb, &addr);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001024 if (IS_ERR(fe)) {
Jan Karabfb257a2008-04-08 20:37:21 +02001025 if (sb->s_flags & MS_RDONLY)
Joe Perchesa40ecd72011-10-10 01:08:04 -07001026 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 +02001027 else {
Joe Perches8076c362011-10-10 01:08:03 -07001028 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
Jan Kara6d3d5e82014-09-04 16:15:51 +02001029 return PTR_ERR(fe);
Jan Karabfb257a2008-04-08 20:37:21 +02001030 }
Jan Kara6d3d5e82014-09-04 16:15:51 +02001031 } else
1032 mdata->s_bitmap_fe = fe;
Jan Karabfb257a2008-04-08 20:37:21 +02001033 }
1034
1035 udf_debug("udf_load_metadata_files Ok\n");
Jan Karabfb257a2008-04-08 20:37:21 +02001036 return 0;
Jan Karabfb257a2008-04-08 20:37:21 +02001037}
1038
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001039static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001040 struct kernel_lb_addr *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041{
1042 struct fileSetDesc *fset;
1043
1044 fset = (struct fileSetDesc *)bh->b_data;
1045
1046 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
1047
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001048 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001050 udf_debug("Rootdir at block=%d, partition=%d\n",
1051 root->logicalBlockNum, root->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052}
1053
Marcin Slusarz883cb9d2008-02-08 04:20:34 -08001054int udf_compute_nr_groups(struct super_block *sb, u32 partition)
1055{
1056 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
Julia Lawall8dee00b2008-02-14 16:15:45 +01001057 return DIV_ROUND_UP(map->s_partition_len +
1058 (sizeof(struct spaceBitmapDesc) << 3),
1059 sb->s_blocksize * 8);
Marcin Slusarz883cb9d2008-02-08 04:20:34 -08001060}
1061
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001062static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
1063{
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001064 struct udf_bitmap *bitmap;
1065 int nr_groups;
1066 int size;
1067
Marcin Slusarz883cb9d2008-02-08 04:20:34 -08001068 nr_groups = udf_compute_nr_groups(sb, index);
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001069 size = sizeof(struct udf_bitmap) +
1070 (sizeof(struct buffer_head *) * nr_groups);
1071
1072 if (size <= PAGE_SIZE)
Joe Perchesed2ae6f2010-11-04 20:08:04 -07001073 bitmap = kzalloc(size, GFP_KERNEL);
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001074 else
Joe Perchesed2ae6f2010-11-04 20:08:04 -07001075 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001076
Joe Perches75b09e02012-01-31 14:42:10 -08001077 if (bitmap == NULL)
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001078 return NULL;
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001079
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001080 bitmap->s_nr_groups = nr_groups;
1081 return bitmap;
1082}
1083
Jan Kara3fb38df2008-04-02 12:26:36 +02001084static int udf_fill_partdesc_info(struct super_block *sb,
1085 struct partitionDesc *p, int p_index)
1086{
1087 struct udf_part_map *map;
1088 struct udf_sb_info *sbi = UDF_SB(sb);
1089 struct partitionHeaderDesc *phd;
1090
1091 map = &sbi->s_partmaps[p_index];
1092
1093 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1094 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1095
1096 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1097 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1098 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1099 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1100 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1101 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1102 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1103 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1104
Joe Perchesa983f362011-10-10 01:08:07 -07001105 udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
1106 p_index, map->s_partition_type,
1107 map->s_partition_root, map->s_partition_len);
Jan Kara3fb38df2008-04-02 12:26:36 +02001108
1109 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1110 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1111 return 0;
1112
1113 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1114 if (phd->unallocSpaceTable.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->unallocSpaceTable.extPosition),
1118 .partitionReferenceNum = p_index,
1119 };
Jan Kara6d3d5e82014-09-04 16:15:51 +02001120 struct inode *inode;
Jan Kara3fb38df2008-04-02 12:26:36 +02001121
Jan Kara6174c2e2014-10-09 12:52:16 +02001122 inode = udf_iget_special(sb, &loc);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001123 if (IS_ERR(inode)) {
Jan Kara3fb38df2008-04-02 12:26:36 +02001124 udf_debug("cannot load unallocSpaceTable (part %d)\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001125 p_index);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001126 return PTR_ERR(inode);
Jan Kara3fb38df2008-04-02 12:26:36 +02001127 }
Jan Kara6d3d5e82014-09-04 16:15:51 +02001128 map->s_uspace.s_table = inode;
Jan Kara3fb38df2008-04-02 12:26:36 +02001129 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1130 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001131 p_index, map->s_uspace.s_table->i_ino);
Jan Kara3fb38df2008-04-02 12:26:36 +02001132 }
1133
1134 if (phd->unallocSpaceBitmap.extLength) {
1135 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1136 if (!bitmap)
Jan Karad759bfa42013-07-25 19:10:59 +02001137 return -ENOMEM;
Jan Kara3fb38df2008-04-02 12:26:36 +02001138 map->s_uspace.s_bitmap = bitmap;
Jan Kara3fb38df2008-04-02 12:26:36 +02001139 bitmap->s_extPosition = le32_to_cpu(
1140 phd->unallocSpaceBitmap.extPosition);
1141 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
Joe Perchesa983f362011-10-10 01:08:07 -07001142 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
1143 p_index, bitmap->s_extPosition);
Jan Kara3fb38df2008-04-02 12:26:36 +02001144 }
1145
1146 if (phd->partitionIntegrityTable.extLength)
1147 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1148
1149 if (phd->freedSpaceTable.extLength) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001150 struct kernel_lb_addr loc = {
Jan Kara3fb38df2008-04-02 12:26:36 +02001151 .logicalBlockNum = le32_to_cpu(
1152 phd->freedSpaceTable.extPosition),
1153 .partitionReferenceNum = p_index,
1154 };
Jan Kara6d3d5e82014-09-04 16:15:51 +02001155 struct inode *inode;
Jan Kara3fb38df2008-04-02 12:26:36 +02001156
Jan Kara6174c2e2014-10-09 12:52:16 +02001157 inode = udf_iget_special(sb, &loc);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001158 if (IS_ERR(inode)) {
Jan Kara3fb38df2008-04-02 12:26:36 +02001159 udf_debug("cannot load freedSpaceTable (part %d)\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001160 p_index);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001161 return PTR_ERR(inode);
Jan Kara3fb38df2008-04-02 12:26:36 +02001162 }
Jan Kara6d3d5e82014-09-04 16:15:51 +02001163 map->s_fspace.s_table = inode;
Jan Kara3fb38df2008-04-02 12:26:36 +02001164 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1165 udf_debug("freedSpaceTable (part %d) @ %ld\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001166 p_index, map->s_fspace.s_table->i_ino);
Jan Kara3fb38df2008-04-02 12:26:36 +02001167 }
1168
1169 if (phd->freedSpaceBitmap.extLength) {
1170 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1171 if (!bitmap)
Jan Karad759bfa42013-07-25 19:10:59 +02001172 return -ENOMEM;
Jan Kara3fb38df2008-04-02 12:26:36 +02001173 map->s_fspace.s_bitmap = bitmap;
Jan Kara3fb38df2008-04-02 12:26:36 +02001174 bitmap->s_extPosition = le32_to_cpu(
1175 phd->freedSpaceBitmap.extPosition);
1176 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
Joe Perchesa983f362011-10-10 01:08:07 -07001177 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1178 p_index, bitmap->s_extPosition);
Jan Kara3fb38df2008-04-02 12:26:36 +02001179 }
1180 return 0;
1181}
1182
Jan Karae971b0b2009-11-30 19:47:55 +01001183static void udf_find_vat_block(struct super_block *sb, int p_index,
1184 int type1_index, sector_t start_block)
1185{
1186 struct udf_sb_info *sbi = UDF_SB(sb);
1187 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1188 sector_t vat_block;
1189 struct kernel_lb_addr ino;
Jan Kara6d3d5e82014-09-04 16:15:51 +02001190 struct inode *inode;
Jan Karae971b0b2009-11-30 19:47:55 +01001191
1192 /*
1193 * VAT file entry is in the last recorded block. Some broken disks have
1194 * it a few blocks before so try a bit harder...
1195 */
1196 ino.partitionReferenceNum = type1_index;
1197 for (vat_block = start_block;
1198 vat_block >= map->s_partition_root &&
Jan Kara6d3d5e82014-09-04 16:15:51 +02001199 vat_block >= start_block - 3; vat_block--) {
Jan Karae971b0b2009-11-30 19:47:55 +01001200 ino.logicalBlockNum = vat_block - map->s_partition_root;
Jan Kara6174c2e2014-10-09 12:52:16 +02001201 inode = udf_iget_special(sb, &ino);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001202 if (!IS_ERR(inode)) {
1203 sbi->s_vat_inode = inode;
1204 break;
1205 }
Jan Karae971b0b2009-11-30 19:47:55 +01001206 }
1207}
1208
Jan Kara38b74a52008-04-02 16:01:35 +02001209static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1210{
1211 struct udf_sb_info *sbi = UDF_SB(sb);
1212 struct udf_part_map *map = &sbi->s_partmaps[p_index];
Jan Karafa5e0812008-04-08 02:08:53 +02001213 struct buffer_head *bh = NULL;
1214 struct udf_inode_info *vati;
1215 uint32_t pos;
1216 struct virtualAllocationTable20 *vat20;
Jan Kara4bf17af2009-07-14 19:30:23 +02001217 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
Jan Kara38b74a52008-04-02 16:01:35 +02001218
Jan Karae971b0b2009-11-30 19:47:55 +01001219 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
Jan Kara4bf17af2009-07-14 19:30:23 +02001220 if (!sbi->s_vat_inode &&
1221 sbi->s_last_block != blocks - 1) {
Joe Perches78ace702011-10-10 01:08:05 -07001222 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1223 (unsigned long)sbi->s_last_block,
1224 (unsigned long)blocks - 1);
Jan Karae971b0b2009-11-30 19:47:55 +01001225 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
Jan Kara4bf17af2009-07-14 19:30:23 +02001226 }
Jan Kara38b74a52008-04-02 16:01:35 +02001227 if (!sbi->s_vat_inode)
Jan Karad759bfa42013-07-25 19:10:59 +02001228 return -EIO;
Jan Kara38b74a52008-04-02 16:01:35 +02001229
1230 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
Sebastian Manciulea47c93582008-04-14 17:06:36 +02001231 map->s_type_specific.s_virtual.s_start_offset = 0;
Jan Kara38b74a52008-04-02 16:01:35 +02001232 map->s_type_specific.s_virtual.s_num_entries =
1233 (sbi->s_vat_inode->i_size - 36) >> 2;
1234 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
Jan Karafa5e0812008-04-08 02:08:53 +02001235 vati = UDF_I(sbi->s_vat_inode);
1236 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1237 pos = udf_block_map(sbi->s_vat_inode, 0);
1238 bh = sb_bread(sb, pos);
1239 if (!bh)
Jan Karad759bfa42013-07-25 19:10:59 +02001240 return -EIO;
Jan Karafa5e0812008-04-08 02:08:53 +02001241 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1242 } else {
1243 vat20 = (struct virtualAllocationTable20 *)
1244 vati->i_ext.i_data;
1245 }
Jan Kara38b74a52008-04-02 16:01:35 +02001246
Jan Kara38b74a52008-04-02 16:01:35 +02001247 map->s_type_specific.s_virtual.s_start_offset =
Sebastian Manciulea47c93582008-04-14 17:06:36 +02001248 le16_to_cpu(vat20->lengthHeader);
Jan Kara38b74a52008-04-02 16:01:35 +02001249 map->s_type_specific.s_virtual.s_num_entries =
1250 (sbi->s_vat_inode->i_size -
1251 map->s_type_specific.s_virtual.
1252 s_start_offset) >> 2;
1253 brelse(bh);
1254 }
1255 return 0;
1256}
1257
Jan Karad759bfa42013-07-25 19:10:59 +02001258/*
1259 * Load partition descriptor block
1260 *
1261 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1262 * sequence.
1263 */
Jan Karac0eb31e2008-04-01 16:50:35 +02001264static int udf_load_partdesc(struct super_block *sb, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265{
Jan Karac0eb31e2008-04-01 16:50:35 +02001266 struct buffer_head *bh;
Jan Karac0eb31e2008-04-01 16:50:35 +02001267 struct partitionDesc *p;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001268 struct udf_part_map *map;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001269 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Kara38b74a52008-04-02 16:01:35 +02001270 int i, type1_idx;
Jan Karac0eb31e2008-04-01 16:50:35 +02001271 uint16_t partitionNumber;
1272 uint16_t ident;
Jan Karad759bfa42013-07-25 19:10:59 +02001273 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274
Jan Karac0eb31e2008-04-01 16:50:35 +02001275 bh = udf_read_tagged(sb, block, block, &ident);
1276 if (!bh)
Jan Karad759bfa42013-07-25 19:10:59 +02001277 return -EAGAIN;
1278 if (ident != TAG_IDENT_PD) {
1279 ret = 0;
Jan Karac0eb31e2008-04-01 16:50:35 +02001280 goto out_bh;
Jan Karad759bfa42013-07-25 19:10:59 +02001281 }
Jan Karac0eb31e2008-04-01 16:50:35 +02001282
1283 p = (struct partitionDesc *)bh->b_data;
1284 partitionNumber = le16_to_cpu(p->partitionNumber);
Jan Kara38b74a52008-04-02 16:01:35 +02001285
Jan Karabfb257a2008-04-08 20:37:21 +02001286 /* First scan for TYPE1, SPARABLE and METADATA partitions */
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001287 for (i = 0; i < sbi->s_partitions; i++) {
1288 map = &sbi->s_partmaps[i];
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001289 udf_debug("Searching map: (%d == %d)\n",
Marcin Slusarz165923f2008-02-10 11:33:08 +01001290 map->s_partition_num, partitionNumber);
Jan Kara38b74a52008-04-02 16:01:35 +02001291 if (map->s_partition_num == partitionNumber &&
1292 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1293 map->s_partition_type == UDF_SPARABLE_MAP15))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 break;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001295 }
1296
Jan Kara38b74a52008-04-02 16:01:35 +02001297 if (i >= sbi->s_partitions) {
Marcin Slusarz165923f2008-02-10 11:33:08 +01001298 udf_debug("Partition (%d) not found in partition map\n",
1299 partitionNumber);
Jan Karad759bfa42013-07-25 19:10:59 +02001300 ret = 0;
Jan Karac0eb31e2008-04-01 16:50:35 +02001301 goto out_bh;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001302 }
1303
Jan Kara3fb38df2008-04-02 12:26:36 +02001304 ret = udf_fill_partdesc_info(sb, p, i);
Jan Karad759bfa42013-07-25 19:10:59 +02001305 if (ret < 0)
1306 goto out_bh;
Jan Kara38b74a52008-04-02 16:01:35 +02001307
1308 /*
Jan Karabfb257a2008-04-08 20:37:21 +02001309 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1310 * PHYSICAL partitions are already set up
Jan Kara38b74a52008-04-02 16:01:35 +02001311 */
1312 type1_idx = i;
Peter A. Felvegi44499602013-10-18 20:07:44 +02001313#ifdef UDFFS_DEBUG
1314 map = NULL; /* supress 'maybe used uninitialized' warning */
1315#endif
Jan Kara38b74a52008-04-02 16:01:35 +02001316 for (i = 0; i < sbi->s_partitions; i++) {
1317 map = &sbi->s_partmaps[i];
1318
1319 if (map->s_partition_num == partitionNumber &&
1320 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
Jan Karabfb257a2008-04-08 20:37:21 +02001321 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1322 map->s_partition_type == UDF_METADATA_MAP25))
Jan Kara38b74a52008-04-02 16:01:35 +02001323 break;
1324 }
1325
Jan Karad759bfa42013-07-25 19:10:59 +02001326 if (i >= sbi->s_partitions) {
1327 ret = 0;
Jan Kara38b74a52008-04-02 16:01:35 +02001328 goto out_bh;
Jan Karad759bfa42013-07-25 19:10:59 +02001329 }
Jan Kara38b74a52008-04-02 16:01:35 +02001330
1331 ret = udf_fill_partdesc_info(sb, p, i);
Jan Karad759bfa42013-07-25 19:10:59 +02001332 if (ret < 0)
Jan Kara38b74a52008-04-02 16:01:35 +02001333 goto out_bh;
1334
Jan Karabfb257a2008-04-08 20:37:21 +02001335 if (map->s_partition_type == UDF_METADATA_MAP25) {
1336 ret = udf_load_metadata_files(sb, i);
Jan Karad759bfa42013-07-25 19:10:59 +02001337 if (ret < 0) {
Joe Perches78ace702011-10-10 01:08:05 -07001338 udf_err(sb, "error loading MetaData partition map %d\n",
1339 i);
Jan Karabfb257a2008-04-08 20:37:21 +02001340 goto out_bh;
1341 }
1342 } else {
Jan Karae729eac2013-07-25 16:15:16 +02001343 /*
1344 * If we have a partition with virtual map, we don't handle
1345 * writing to it (we overwrite blocks instead of relocating
1346 * them).
1347 */
1348 if (!(sb->s_flags & MS_RDONLY)) {
1349 ret = -EACCES;
1350 goto out_bh;
1351 }
Jan Karabfb257a2008-04-08 20:37:21 +02001352 ret = udf_load_vat(sb, i, type1_idx);
Jan Karad759bfa42013-07-25 19:10:59 +02001353 if (ret < 0)
Jan Karabfb257a2008-04-08 20:37:21 +02001354 goto out_bh;
Jan Karabfb257a2008-04-08 20:37:21 +02001355 }
Jan Karad759bfa42013-07-25 19:10:59 +02001356 ret = 0;
Jan Karac0eb31e2008-04-01 16:50:35 +02001357out_bh:
Jan Kara2e0838f2008-04-01 18:08:51 +02001358 /* In case loading failed, we handle cleanup in udf_fill_super */
Jan Karac0eb31e2008-04-01 16:50:35 +02001359 brelse(bh);
1360 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361}
1362
Jan Kara1df2ae32012-06-27 21:23:07 +02001363static int udf_load_sparable_map(struct super_block *sb,
1364 struct udf_part_map *map,
1365 struct sparablePartitionMap *spm)
1366{
1367 uint32_t loc;
1368 uint16_t ident;
1369 struct sparingTable *st;
1370 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1371 int i;
1372 struct buffer_head *bh;
1373
1374 map->s_partition_type = UDF_SPARABLE_MAP15;
1375 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1376 if (!is_power_of_2(sdata->s_packet_len)) {
1377 udf_err(sb, "error loading logical volume descriptor: "
1378 "Invalid packet length %u\n",
1379 (unsigned)sdata->s_packet_len);
1380 return -EIO;
1381 }
1382 if (spm->numSparingTables > 4) {
1383 udf_err(sb, "error loading logical volume descriptor: "
1384 "Too many sparing tables (%d)\n",
1385 (int)spm->numSparingTables);
1386 return -EIO;
1387 }
1388
1389 for (i = 0; i < spm->numSparingTables; i++) {
1390 loc = le32_to_cpu(spm->locSparingTable[i]);
1391 bh = udf_read_tagged(sb, loc, loc, &ident);
1392 if (!bh)
1393 continue;
1394
1395 st = (struct sparingTable *)bh->b_data;
1396 if (ident != 0 ||
1397 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1398 strlen(UDF_ID_SPARING)) ||
1399 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1400 sb->s_blocksize) {
1401 brelse(bh);
1402 continue;
1403 }
1404
1405 sdata->s_spar_map[i] = bh;
1406 }
1407 map->s_partition_func = udf_get_pblock_spar15;
1408 return 0;
1409}
1410
Jan Karac0eb31e2008-04-01 16:50:35 +02001411static int udf_load_logicalvol(struct super_block *sb, sector_t block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001412 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413{
1414 struct logicalVolDesc *lvd;
Jan Kara1df2ae32012-06-27 21:23:07 +02001415 int i, offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416 uint8_t type;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001417 struct udf_sb_info *sbi = UDF_SB(sb);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001418 struct genericPartitionMap *gpm;
Jan Karac0eb31e2008-04-01 16:50:35 +02001419 uint16_t ident;
1420 struct buffer_head *bh;
Jan Karaadee11b2012-06-27 20:20:22 +02001421 unsigned int table_len;
Jan Karad759bfa42013-07-25 19:10:59 +02001422 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423
Jan Karac0eb31e2008-04-01 16:50:35 +02001424 bh = udf_read_tagged(sb, block, block, &ident);
1425 if (!bh)
Jan Karad759bfa42013-07-25 19:10:59 +02001426 return -EAGAIN;
Jan Karac0eb31e2008-04-01 16:50:35 +02001427 BUG_ON(ident != TAG_IDENT_LVD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428 lvd = (struct logicalVolDesc *)bh->b_data;
Jan Karaadee11b2012-06-27 20:20:22 +02001429 table_len = le32_to_cpu(lvd->mapTableLength);
Jan Kara57b96552012-07-10 17:58:04 +02001430 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
Jan Karaadee11b2012-06-27 20:20:22 +02001431 udf_err(sb, "error loading logical volume descriptor: "
1432 "Partition table too long (%u > %lu)\n", table_len,
1433 sb->s_blocksize - sizeof(*lvd));
Jan Karad759bfa42013-07-25 19:10:59 +02001434 ret = -EIO;
Jan Karaadee11b2012-06-27 20:20:22 +02001435 goto out_bh;
1436 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437
Jan Karacb14d342012-06-27 20:08:44 +02001438 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1439 if (ret)
Jan Karac0eb31e2008-04-01 16:50:35 +02001440 goto out_bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001442 for (i = 0, offset = 0;
Jan Karaadee11b2012-06-27 20:20:22 +02001443 i < sbi->s_partitions && offset < table_len;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001444 i++, offset += gpm->partitionMapLength) {
1445 struct udf_part_map *map = &sbi->s_partmaps[i];
1446 gpm = (struct genericPartitionMap *)
1447 &(lvd->partitionMaps[offset]);
1448 type = gpm->partitionMapType;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001449 if (type == 1) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001450 struct genericPartitionMap1 *gpm1 =
1451 (struct genericPartitionMap1 *)gpm;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001452 map->s_partition_type = UDF_TYPE1_MAP15;
1453 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1454 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1455 map->s_partition_func = NULL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001456 } else if (type == 2) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001457 struct udfPartitionMap2 *upm2 =
1458 (struct udfPartitionMap2 *)gpm;
1459 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1460 strlen(UDF_ID_VIRTUAL))) {
1461 u16 suf =
1462 le16_to_cpu(((__le16 *)upm2->partIdent.
1463 identSuffix)[0]);
Jan Karac82a1272008-04-08 01:16:32 +02001464 if (suf < 0x0200) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001465 map->s_partition_type =
1466 UDF_VIRTUAL_MAP15;
1467 map->s_partition_func =
1468 udf_get_pblock_virt15;
Jan Karac82a1272008-04-08 01:16:32 +02001469 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001470 map->s_partition_type =
1471 UDF_VIRTUAL_MAP20;
1472 map->s_partition_func =
1473 udf_get_pblock_virt20;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474 }
Marcin Slusarz4b111112008-02-08 04:20:36 -08001475 } else if (!strncmp(upm2->partIdent.ident,
1476 UDF_ID_SPARABLE,
1477 strlen(UDF_ID_SPARABLE))) {
Jan Karad759bfa42013-07-25 19:10:59 +02001478 ret = udf_load_sparable_map(sb, map,
1479 (struct sparablePartitionMap *)gpm);
1480 if (ret < 0)
Jan Kara1df2ae32012-06-27 21:23:07 +02001481 goto out_bh;
Jan Karabfb257a2008-04-08 20:37:21 +02001482 } else if (!strncmp(upm2->partIdent.ident,
1483 UDF_ID_METADATA,
1484 strlen(UDF_ID_METADATA))) {
1485 struct udf_meta_data *mdata =
1486 &map->s_type_specific.s_metadata;
1487 struct metadataPartitionMap *mdm =
1488 (struct metadataPartitionMap *)
1489 &(lvd->partitionMaps[offset]);
Joe Perchesa983f362011-10-10 01:08:07 -07001490 udf_debug("Parsing Logical vol part %d type %d id=%s\n",
1491 i, type, UDF_ID_METADATA);
Jan Karabfb257a2008-04-08 20:37:21 +02001492
1493 map->s_partition_type = UDF_METADATA_MAP25;
1494 map->s_partition_func = udf_get_pblock_meta25;
1495
1496 mdata->s_meta_file_loc =
1497 le32_to_cpu(mdm->metadataFileLoc);
1498 mdata->s_mirror_file_loc =
1499 le32_to_cpu(mdm->metadataMirrorFileLoc);
1500 mdata->s_bitmap_file_loc =
1501 le32_to_cpu(mdm->metadataBitmapFileLoc);
1502 mdata->s_alloc_unit_size =
1503 le32_to_cpu(mdm->allocUnitSize);
1504 mdata->s_align_unit_size =
1505 le16_to_cpu(mdm->alignUnitSize);
Jan Karaed47a7d2011-10-24 16:47:48 +02001506 if (mdm->flags & 0x01)
1507 mdata->s_flags |= MF_DUPLICATE_MD;
Jan Karabfb257a2008-04-08 20:37:21 +02001508
1509 udf_debug("Metadata Ident suffix=0x%x\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001510 le16_to_cpu(*(__le16 *)
1511 mdm->partIdent.identSuffix));
Jan Karabfb257a2008-04-08 20:37:21 +02001512 udf_debug("Metadata part num=%d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001513 le16_to_cpu(mdm->partitionNum));
Jan Karabfb257a2008-04-08 20:37:21 +02001514 udf_debug("Metadata part alloc unit size=%d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001515 le32_to_cpu(mdm->allocUnitSize));
Jan Karabfb257a2008-04-08 20:37:21 +02001516 udf_debug("Metadata file loc=%d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001517 le32_to_cpu(mdm->metadataFileLoc));
Jan Karabfb257a2008-04-08 20:37:21 +02001518 udf_debug("Mirror file loc=%d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001519 le32_to_cpu(mdm->metadataMirrorFileLoc));
Jan Karabfb257a2008-04-08 20:37:21 +02001520 udf_debug("Bitmap file loc=%d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001521 le32_to_cpu(mdm->metadataBitmapFileLoc));
Jan Karaed47a7d2011-10-24 16:47:48 +02001522 udf_debug("Flags: %d %d\n",
1523 mdata->s_flags, mdm->flags);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001524 } else {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001525 udf_debug("Unknown ident: %s\n",
1526 upm2->partIdent.ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 continue;
1528 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001529 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1530 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531 }
1532 udf_debug("Partition (%d:%d) type %d on volume %d\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001533 i, map->s_partition_num, type, map->s_volumeseqnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534 }
1535
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001536 if (fileset) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001537 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538
1539 *fileset = lelb_to_cpu(la->extLocation);
Joe Perchesa983f362011-10-10 01:08:07 -07001540 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1541 fileset->logicalBlockNum,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001542 fileset->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543 }
1544 if (lvd->integritySeqExt.extLength)
1545 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
Jan Karad759bfa42013-07-25 19:10:59 +02001546 ret = 0;
Jan Karac0eb31e2008-04-01 16:50:35 +02001547out_bh:
1548 brelse(bh);
1549 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550}
1551
1552/*
Alden Tondettara47241c2016-04-25 19:27:56 -07001553 * Find the prevailing Logical Volume Integrity Descriptor.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 */
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001555static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556{
Alden Tondettara47241c2016-04-25 19:27:56 -07001557 struct buffer_head *bh, *final_bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558 uint16_t ident;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001559 struct udf_sb_info *sbi = UDF_SB(sb);
1560 struct logicalVolIntegrityDesc *lvid;
Alden Tondettara47241c2016-04-25 19:27:56 -07001561 int indirections = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562
Alden Tondettara47241c2016-04-25 19:27:56 -07001563 while (++indirections <= UDF_MAX_LVID_NESTING) {
1564 final_bh = NULL;
1565 while (loc.extLength > 0 &&
1566 (bh = udf_read_tagged(sb, loc.extLocation,
1567 loc.extLocation, &ident))) {
1568 if (ident != TAG_IDENT_LVID) {
1569 brelse(bh);
1570 break;
1571 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001572
Alden Tondettara47241c2016-04-25 19:27:56 -07001573 brelse(final_bh);
1574 final_bh = bh;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001575
Alden Tondettara47241c2016-04-25 19:27:56 -07001576 loc.extLength -= sb->s_blocksize;
1577 loc.extLocation++;
1578 }
1579
1580 if (!final_bh)
1581 return;
1582
1583 brelse(sbi->s_lvid_bh);
1584 sbi->s_lvid_bh = final_bh;
1585
1586 lvid = (struct logicalVolIntegrityDesc *)final_bh->b_data;
1587 if (lvid->nextIntegrityExt.extLength == 0)
1588 return;
1589
1590 loc = leea_to_cpu(lvid->nextIntegrityExt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591 }
Alden Tondettara47241c2016-04-25 19:27:56 -07001592
1593 udf_warn(sb, "Too many LVID indirections (max %u), ignoring.\n",
1594 UDF_MAX_LVID_NESTING);
1595 brelse(sbi->s_lvid_bh);
1596 sbi->s_lvid_bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597}
1598
Vegard Nossume7a4eb82015-12-10 17:13:41 +01001599
1600/*
Jan Karad759bfa42013-07-25 19:10:59 +02001601 * Process a main/reserve volume descriptor sequence.
1602 * @block First block of first extent of the sequence.
1603 * @lastblock Lastblock of first extent of the sequence.
1604 * @fileset There we store extent containing root fileset
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605 *
Jan Karad759bfa42013-07-25 19:10:59 +02001606 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1607 * sequence
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608 */
Jan Karad759bfa42013-07-25 19:10:59 +02001609static noinline int udf_process_sequence(
1610 struct super_block *sb,
1611 sector_t block, sector_t lastblock,
1612 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613{
1614 struct buffer_head *bh = NULL;
1615 struct udf_vds_record vds[VDS_POS_LENGTH];
Marcin Slusarz4b111112008-02-08 04:20:36 -08001616 struct udf_vds_record *curr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617 struct generic_desc *gd;
1618 struct volDescPtr *vdp;
Fabian Frederick2b8f9422015-02-04 18:15:04 +01001619 bool done = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001620 uint32_t vdsn;
1621 uint16_t ident;
1622 long next_s = 0, next_e = 0;
Jan Karad759bfa42013-07-25 19:10:59 +02001623 int ret;
Vegard Nossume7a4eb82015-12-10 17:13:41 +01001624 unsigned int indirections = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625
1626 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1627
Jan Karac0eb31e2008-04-01 16:50:35 +02001628 /*
1629 * Read the main descriptor sequence and find which descriptors
1630 * are in it.
1631 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001632 for (; (!done && block <= lastblock); block++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633
1634 bh = udf_read_tagged(sb, block, block, &ident);
Jan Karac0eb31e2008-04-01 16:50:35 +02001635 if (!bh) {
Joe Perches78ace702011-10-10 01:08:05 -07001636 udf_err(sb,
1637 "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
1638 (unsigned long long)block);
Jan Karad759bfa42013-07-25 19:10:59 +02001639 return -EAGAIN;
Jan Karac0eb31e2008-04-01 16:50:35 +02001640 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001641
1642 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1643 gd = (struct generic_desc *)bh->b_data;
1644 vdsn = le32_to_cpu(gd->volDescSeqNum);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001645 switch (ident) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001646 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001647 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1648 if (vdsn >= curr->volDescSeqNum) {
1649 curr->volDescSeqNum = vdsn;
1650 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001651 }
1652 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001653 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001654 curr = &vds[VDS_POS_VOL_DESC_PTR];
1655 if (vdsn >= curr->volDescSeqNum) {
1656 curr->volDescSeqNum = vdsn;
1657 curr->block = block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001659 vdp = (struct volDescPtr *)bh->b_data;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001660 next_s = le32_to_cpu(
1661 vdp->nextVolDescSeqExt.extLocation);
1662 next_e = le32_to_cpu(
1663 vdp->nextVolDescSeqExt.extLength);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001664 next_e = next_e >> sb->s_blocksize_bits;
1665 next_e += next_s;
1666 }
1667 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001668 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001669 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1670 if (vdsn >= curr->volDescSeqNum) {
1671 curr->volDescSeqNum = vdsn;
1672 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001673 }
1674 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001675 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001676 curr = &vds[VDS_POS_PARTITION_DESC];
1677 if (!curr->block)
1678 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001679 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001680 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001681 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1682 if (vdsn >= curr->volDescSeqNum) {
1683 curr->volDescSeqNum = vdsn;
1684 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001685 }
1686 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001687 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001688 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1689 if (vdsn >= curr->volDescSeqNum) {
1690 curr->volDescSeqNum = vdsn;
1691 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001692 }
1693 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001694 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
Vegard Nossume7a4eb82015-12-10 17:13:41 +01001695 if (++indirections > UDF_MAX_TD_NESTING) {
1696 udf_err(sb, "too many TDs (max %u supported)\n", UDF_MAX_TD_NESTING);
1697 brelse(bh);
1698 return -EIO;
1699 }
1700
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001701 vds[VDS_POS_TERMINATING_DESC].block = block;
1702 if (next_e) {
1703 block = next_s;
1704 lastblock = next_e;
1705 next_s = next_e = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001706 } else
Fabian Frederick2b8f9422015-02-04 18:15:04 +01001707 done = true;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001708 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07001710 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711 }
Jan Karac0eb31e2008-04-01 16:50:35 +02001712 /*
1713 * Now read interesting descriptors again and process them
1714 * in a suitable order
1715 */
1716 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
Joe Perches78ace702011-10-10 01:08:05 -07001717 udf_err(sb, "Primary Volume Descriptor not found!\n");
Jan Karad759bfa42013-07-25 19:10:59 +02001718 return -EAGAIN;
Jan Karac0eb31e2008-04-01 16:50:35 +02001719 }
Jan Karad759bfa42013-07-25 19:10:59 +02001720 ret = udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block);
1721 if (ret < 0)
1722 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723
Jan Karad759bfa42013-07-25 19:10:59 +02001724 if (vds[VDS_POS_LOGICAL_VOL_DESC].block) {
1725 ret = udf_load_logicalvol(sb,
1726 vds[VDS_POS_LOGICAL_VOL_DESC].block,
1727 fileset);
1728 if (ret < 0)
1729 return ret;
1730 }
Marcin Slusarz165923f2008-02-10 11:33:08 +01001731
Jan Karac0eb31e2008-04-01 16:50:35 +02001732 if (vds[VDS_POS_PARTITION_DESC].block) {
1733 /*
1734 * We rescan the whole descriptor sequence to find
1735 * partition descriptor blocks and process them.
1736 */
1737 for (block = vds[VDS_POS_PARTITION_DESC].block;
1738 block < vds[VDS_POS_TERMINATING_DESC].block;
Jan Karad759bfa42013-07-25 19:10:59 +02001739 block++) {
1740 ret = udf_load_partdesc(sb, block);
1741 if (ret < 0)
1742 return ret;
1743 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744 }
1745
1746 return 0;
1747}
1748
Jan Karad759bfa42013-07-25 19:10:59 +02001749/*
1750 * Load Volume Descriptor Sequence described by anchor in bh
1751 *
1752 * Returns <0 on error, 0 on success
1753 */
Jan Kara403460052009-03-19 16:21:38 +01001754static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1755 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756{
Jan Kara403460052009-03-19 16:21:38 +01001757 struct anchorVolDescPtr *anchor;
Jan Karad759bfa42013-07-25 19:10:59 +02001758 sector_t main_s, main_e, reserve_s, reserve_e;
1759 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760
Jan Kara403460052009-03-19 16:21:38 +01001761 anchor = (struct anchorVolDescPtr *)bh->b_data;
1762
1763 /* Locate the main sequence */
1764 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1765 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1766 main_e = main_e >> sb->s_blocksize_bits;
1767 main_e += main_s;
1768
1769 /* Locate the reserve sequence */
1770 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1771 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1772 reserve_e = reserve_e >> sb->s_blocksize_bits;
1773 reserve_e += reserve_s;
1774
1775 /* Process the main & reserve sequences */
1776 /* responsible for finding the PartitionDesc(s) */
Jan Karad759bfa42013-07-25 19:10:59 +02001777 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1778 if (ret != -EAGAIN)
1779 return ret;
Jan Karabff943a2012-06-27 22:27:05 +02001780 udf_sb_free_partitions(sb);
Jan Karad759bfa42013-07-25 19:10:59 +02001781 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1782 if (ret < 0) {
1783 udf_sb_free_partitions(sb);
1784 /* No sequence was OK, return -EIO */
1785 if (ret == -EAGAIN)
1786 ret = -EIO;
1787 }
1788 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789}
1790
Jan Kara403460052009-03-19 16:21:38 +01001791/*
1792 * Check whether there is an anchor block in the given block and
1793 * load Volume Descriptor Sequence if so.
Jan Karad759bfa42013-07-25 19:10:59 +02001794 *
1795 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1796 * block
Jan Kara403460052009-03-19 16:21:38 +01001797 */
1798static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1799 struct kernel_lb_addr *fileset)
1800{
1801 struct buffer_head *bh;
1802 uint16_t ident;
1803 int ret;
1804
1805 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1806 udf_fixed_to_variable(block) >=
1807 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
Jan Karad759bfa42013-07-25 19:10:59 +02001808 return -EAGAIN;
Jan Kara403460052009-03-19 16:21:38 +01001809
1810 bh = udf_read_tagged(sb, block, block, &ident);
1811 if (!bh)
Jan Karad759bfa42013-07-25 19:10:59 +02001812 return -EAGAIN;
Jan Kara403460052009-03-19 16:21:38 +01001813 if (ident != TAG_IDENT_AVDP) {
1814 brelse(bh);
Jan Karad759bfa42013-07-25 19:10:59 +02001815 return -EAGAIN;
Jan Kara403460052009-03-19 16:21:38 +01001816 }
1817 ret = udf_load_sequence(sb, bh, fileset);
1818 brelse(bh);
1819 return ret;
1820}
1821
Jan Karad759bfa42013-07-25 19:10:59 +02001822/*
1823 * Search for an anchor volume descriptor pointer.
1824 *
1825 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1826 * of anchors.
1827 */
1828static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1829 struct kernel_lb_addr *fileset)
Jan Kara403460052009-03-19 16:21:38 +01001830{
1831 sector_t last[6];
1832 int i;
1833 struct udf_sb_info *sbi = UDF_SB(sb);
1834 int last_count = 0;
Jan Karad759bfa42013-07-25 19:10:59 +02001835 int ret;
Jan Kara403460052009-03-19 16:21:38 +01001836
1837 /* First try user provided anchor */
1838 if (sbi->s_anchor) {
Jan Karad759bfa42013-07-25 19:10:59 +02001839 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1840 if (ret != -EAGAIN)
1841 return ret;
Jan Kara403460052009-03-19 16:21:38 +01001842 }
1843 /*
1844 * according to spec, anchor is in either:
1845 * block 256
1846 * lastblock-256
1847 * lastblock
1848 * however, if the disc isn't closed, it could be 512.
1849 */
Jan Karad759bfa42013-07-25 19:10:59 +02001850 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1851 if (ret != -EAGAIN)
1852 return ret;
Jan Kara403460052009-03-19 16:21:38 +01001853 /*
1854 * The trouble is which block is the last one. Drives often misreport
1855 * this so we try various possibilities.
1856 */
Jan Karad759bfa42013-07-25 19:10:59 +02001857 last[last_count++] = *lastblock;
1858 if (*lastblock >= 1)
1859 last[last_count++] = *lastblock - 1;
1860 last[last_count++] = *lastblock + 1;
1861 if (*lastblock >= 2)
1862 last[last_count++] = *lastblock - 2;
1863 if (*lastblock >= 150)
1864 last[last_count++] = *lastblock - 150;
1865 if (*lastblock >= 152)
1866 last[last_count++] = *lastblock - 152;
Jan Kara403460052009-03-19 16:21:38 +01001867
1868 for (i = 0; i < last_count; i++) {
1869 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1870 sb->s_blocksize_bits)
1871 continue;
Jan Karad759bfa42013-07-25 19:10:59 +02001872 ret = udf_check_anchor_block(sb, last[i], fileset);
1873 if (ret != -EAGAIN) {
1874 if (!ret)
1875 *lastblock = last[i];
1876 return ret;
1877 }
Jan Kara403460052009-03-19 16:21:38 +01001878 if (last[i] < 256)
1879 continue;
Jan Karad759bfa42013-07-25 19:10:59 +02001880 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1881 if (ret != -EAGAIN) {
1882 if (!ret)
1883 *lastblock = last[i];
1884 return ret;
1885 }
Jan Kara403460052009-03-19 16:21:38 +01001886 }
1887
1888 /* Finally try block 512 in case media is open */
Jan Karad759bfa42013-07-25 19:10:59 +02001889 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
Jan Kara403460052009-03-19 16:21:38 +01001890}
1891
1892/*
1893 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1894 * area specified by it. The function expects sbi->s_lastblock to be the last
1895 * block on the media.
1896 *
Jan Karad759bfa42013-07-25 19:10:59 +02001897 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1898 * was not found.
Jan Kara403460052009-03-19 16:21:38 +01001899 */
1900static int udf_find_anchor(struct super_block *sb,
1901 struct kernel_lb_addr *fileset)
1902{
Jan Kara403460052009-03-19 16:21:38 +01001903 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Karad759bfa42013-07-25 19:10:59 +02001904 sector_t lastblock = sbi->s_last_block;
1905 int ret;
Jan Kara403460052009-03-19 16:21:38 +01001906
Jan Karad759bfa42013-07-25 19:10:59 +02001907 ret = udf_scan_anchors(sb, &lastblock, fileset);
1908 if (ret != -EAGAIN)
Jan Kara403460052009-03-19 16:21:38 +01001909 goto out;
1910
1911 /* No anchor found? Try VARCONV conversion of block numbers */
1912 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
Jan Karad759bfa42013-07-25 19:10:59 +02001913 lastblock = udf_variable_to_fixed(sbi->s_last_block);
Jan Kara403460052009-03-19 16:21:38 +01001914 /* Firstly, we try to not convert number of the last block */
Jan Karad759bfa42013-07-25 19:10:59 +02001915 ret = udf_scan_anchors(sb, &lastblock, fileset);
1916 if (ret != -EAGAIN)
Jan Kara403460052009-03-19 16:21:38 +01001917 goto out;
1918
Jan Karad759bfa42013-07-25 19:10:59 +02001919 lastblock = sbi->s_last_block;
Jan Kara403460052009-03-19 16:21:38 +01001920 /* Secondly, we try with converted number of the last block */
Jan Karad759bfa42013-07-25 19:10:59 +02001921 ret = udf_scan_anchors(sb, &lastblock, fileset);
1922 if (ret < 0) {
Jan Kara403460052009-03-19 16:21:38 +01001923 /* VARCONV didn't help. Clear it. */
1924 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
Jan Kara403460052009-03-19 16:21:38 +01001925 }
1926out:
Jan Karad759bfa42013-07-25 19:10:59 +02001927 if (ret == 0)
1928 sbi->s_last_block = lastblock;
1929 return ret;
Jan Kara403460052009-03-19 16:21:38 +01001930}
1931
1932/*
1933 * Check Volume Structure Descriptor, find Anchor block and load Volume
Jan Karad759bfa42013-07-25 19:10:59 +02001934 * Descriptor Sequence.
1935 *
1936 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1937 * block was not found.
Jan Kara403460052009-03-19 16:21:38 +01001938 */
1939static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1940 int silent, struct kernel_lb_addr *fileset)
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001941{
1942 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Kara403460052009-03-19 16:21:38 +01001943 loff_t nsr_off;
Jan Karad759bfa42013-07-25 19:10:59 +02001944 int ret;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001945
1946 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1947 if (!silent)
Joe Perches78ace702011-10-10 01:08:05 -07001948 udf_warn(sb, "Bad block size\n");
Jan Karad759bfa42013-07-25 19:10:59 +02001949 return -EINVAL;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001950 }
1951 sbi->s_last_block = uopt->lastblock;
Jan Kara403460052009-03-19 16:21:38 +01001952 if (!uopt->novrs) {
1953 /* Check that it is NSR02 compliant */
1954 nsr_off = udf_check_vsd(sb);
1955 if (!nsr_off) {
1956 if (!silent)
Joe Perches78ace702011-10-10 01:08:05 -07001957 udf_warn(sb, "No VRS found\n");
Jan Kara403460052009-03-19 16:21:38 +01001958 return 0;
1959 }
1960 if (nsr_off == -1)
Peter A. Felvegi44499602013-10-18 20:07:44 +02001961 udf_debug("Failed to read sector at offset %d. "
1962 "Assuming open disc. Skipping validity "
1963 "check\n", VSD_FIRST_SECTOR_OFFSET);
Jan Kara403460052009-03-19 16:21:38 +01001964 if (!sbi->s_last_block)
1965 sbi->s_last_block = udf_get_last_block(sb);
1966 } else {
1967 udf_debug("Validity check skipped because of novrs option\n");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001968 }
Jan Kara403460052009-03-19 16:21:38 +01001969
1970 /* Look for anchor block and load Volume Descriptor Sequence */
1971 sbi->s_anchor = uopt->anchor;
Jan Karad759bfa42013-07-25 19:10:59 +02001972 ret = udf_find_anchor(sb, fileset);
1973 if (ret < 0) {
1974 if (!silent && ret == -EAGAIN)
Joe Perches78ace702011-10-10 01:08:05 -07001975 udf_warn(sb, "No anchor found\n");
Jan Karad759bfa42013-07-25 19:10:59 +02001976 return ret;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001977 }
Jan Karad759bfa42013-07-25 19:10:59 +02001978 return 0;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001979}
1980
Linus Torvalds1da177e2005-04-16 15:20:36 -07001981static void udf_open_lvid(struct super_block *sb)
1982{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001983 struct udf_sb_info *sbi = UDF_SB(sb);
1984 struct buffer_head *bh = sbi->s_lvid_bh;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001985 struct logicalVolIntegrityDesc *lvid;
1986 struct logicalVolIntegrityDescImpUse *lvidiu;
Jan Kara146bca72009-03-16 18:27:37 +01001987
Marcin Slusarz165923f2008-02-10 11:33:08 +01001988 if (!bh)
1989 return;
Jan Kara69d75672013-09-12 22:00:15 +02001990 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1991 lvidiu = udf_sb_lvidiu(sb);
1992 if (!lvidiu)
1993 return;
Jan Kara949f4a72010-10-20 18:49:20 +02001994
1995 mutex_lock(&sbi->s_alloc_mutex);
Marcin Slusarz165923f2008-02-10 11:33:08 +01001996 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1997 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1998 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1999 CURRENT_TIME);
Jan Kara146bca72009-03-16 18:27:37 +01002000 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002001
Marcin Slusarz165923f2008-02-10 11:33:08 +01002002 lvid->descTag.descCRC = cpu_to_le16(
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002003 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02002004 le16_to_cpu(lvid->descTag.descCRCLength)));
Marcin Slusarz165923f2008-02-10 11:33:08 +01002005
2006 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
2007 mark_buffer_dirty(bh);
Jan Kara146bca72009-03-16 18:27:37 +01002008 sbi->s_lvid_dirty = 0;
Jan Kara949f4a72010-10-20 18:49:20 +02002009 mutex_unlock(&sbi->s_alloc_mutex);
Jan Kara9734c972013-01-17 22:11:38 +01002010 /* Make opening of filesystem visible on the media immediately */
2011 sync_dirty_buffer(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012}
2013
2014static void udf_close_lvid(struct super_block *sb)
2015{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002016 struct udf_sb_info *sbi = UDF_SB(sb);
2017 struct buffer_head *bh = sbi->s_lvid_bh;
2018 struct logicalVolIntegrityDesc *lvid;
Marcin Slusarz165923f2008-02-10 11:33:08 +01002019 struct logicalVolIntegrityDescImpUse *lvidiu;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002020
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002021 if (!bh)
2022 return;
Jan Kara69d75672013-09-12 22:00:15 +02002023 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2024 lvidiu = udf_sb_lvidiu(sb);
2025 if (!lvidiu)
2026 return;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002027
Jan Kara949f4a72010-10-20 18:49:20 +02002028 mutex_lock(&sbi->s_alloc_mutex);
Marcin Slusarz165923f2008-02-10 11:33:08 +01002029 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
2030 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
2031 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
2032 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
2033 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
2034 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
2035 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
2036 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
2037 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
2038 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039
Marcin Slusarz165923f2008-02-10 11:33:08 +01002040 lvid->descTag.descCRC = cpu_to_le16(
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002041 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02002042 le16_to_cpu(lvid->descTag.descCRCLength)));
Marcin Slusarz165923f2008-02-10 11:33:08 +01002043
2044 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
Jan Kara853a0c22011-12-23 11:53:07 +01002045 /*
2046 * We set buffer uptodate unconditionally here to avoid spurious
2047 * warnings from mark_buffer_dirty() when previous EIO has marked
2048 * the buffer as !uptodate
2049 */
2050 set_buffer_uptodate(bh);
Marcin Slusarz165923f2008-02-10 11:33:08 +01002051 mark_buffer_dirty(bh);
Jan Kara146bca72009-03-16 18:27:37 +01002052 sbi->s_lvid_dirty = 0;
Jan Kara949f4a72010-10-20 18:49:20 +02002053 mutex_unlock(&sbi->s_alloc_mutex);
Jan Kara9734c972013-01-17 22:11:38 +01002054 /* Make closing of filesystem visible on the media immediately */
2055 sync_dirty_buffer(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056}
2057
Jan Karad664b6a2010-10-20 18:28:46 +02002058u64 lvid_get_unique_id(struct super_block *sb)
2059{
2060 struct buffer_head *bh;
2061 struct udf_sb_info *sbi = UDF_SB(sb);
2062 struct logicalVolIntegrityDesc *lvid;
2063 struct logicalVolHeaderDesc *lvhd;
2064 u64 uniqueID;
2065 u64 ret;
2066
2067 bh = sbi->s_lvid_bh;
2068 if (!bh)
2069 return 0;
2070
2071 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2072 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2073
2074 mutex_lock(&sbi->s_alloc_mutex);
2075 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2076 if (!(++uniqueID & 0xFFFFFFFF))
2077 uniqueID += 16;
2078 lvhd->uniqueID = cpu_to_le64(uniqueID);
2079 mutex_unlock(&sbi->s_alloc_mutex);
2080 mark_buffer_dirty(bh);
2081
2082 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002083}
2084
Linus Torvalds1da177e2005-04-16 15:20:36 -07002085static int udf_fill_super(struct super_block *sb, void *options, int silent)
2086{
Jan Karad759bfa42013-07-25 19:10:59 +02002087 int ret = -EINVAL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002088 struct inode *inode = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089 struct udf_options uopt;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002090 struct kernel_lb_addr rootdir, fileset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002091 struct udf_sb_info *sbi;
Jan Kara9181f8b2015-08-20 14:50:07 +02002092 bool lvid_open = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093
2094 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -08002095 uopt.uid = INVALID_UID;
2096 uopt.gid = INVALID_GID;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097 uopt.umask = 0;
Marcin Slusarz87bc7302008-12-02 13:40:11 +01002098 uopt.fmode = UDF_INVALID_MODE;
2099 uopt.dmode = UDF_INVALID_MODE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002101 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
Alessio Igor Bogani9db9f9e2010-11-16 18:40:49 +01002102 if (!sbi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002103 return -ENOMEM;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002104
Linus Torvalds1da177e2005-04-16 15:20:36 -07002105 sb->s_fs_info = sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106
Ingo Molnar1e7933d2006-03-23 03:00:44 -08002107 mutex_init(&sbi->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002108
Miklos Szeredi6da80892008-02-08 04:21:50 -08002109 if (!udf_parse_options((char *)options, &uopt, false))
Markus Elfringfdf26572014-11-18 18:29:10 +01002110 goto parse_options_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111
2112 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002113 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
Joe Perches8076c362011-10-10 01:08:03 -07002114 udf_err(sb, "utf8 cannot be combined with iocharset\n");
Markus Elfringfdf26572014-11-18 18:29:10 +01002115 goto parse_options_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116 }
2117#ifdef CONFIG_UDF_NLS
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002118 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119 uopt.nls_map = load_nls_default();
2120 if (!uopt.nls_map)
2121 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2122 else
2123 udf_debug("Using default NLS map\n");
2124 }
2125#endif
2126 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2127 uopt.flags |= (1 << UDF_FLAG_UTF8);
2128
2129 fileset.logicalBlockNum = 0xFFFFFFFF;
2130 fileset.partitionReferenceNum = 0xFFFF;
2131
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002132 sbi->s_flags = uopt.flags;
2133 sbi->s_uid = uopt.uid;
2134 sbi->s_gid = uopt.gid;
2135 sbi->s_umask = uopt.umask;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01002136 sbi->s_fmode = uopt.fmode;
2137 sbi->s_dmode = uopt.dmode;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002138 sbi->s_nls_map = uopt.nls_map;
Jan Karac03cad22010-10-20 22:17:28 +02002139 rwlock_init(&sbi->s_cred_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002140
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002141 if (uopt.session == 0xFFFFFFFF)
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002142 sbi->s_session = udf_get_last_session(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143 else
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002144 sbi->s_session = uopt.session;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002146 udf_debug("Multi-session=%d\n", sbi->s_session);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148 /* Fill in the rest of the superblock */
2149 sb->s_op = &udf_sb_ops;
Rasmus Rohde221e5832008-04-30 17:22:06 +02002150 sb->s_export_op = &udf_export_ops;
Christoph Hellwig123e9ca2010-05-19 07:16:44 -04002151
Linus Torvalds1da177e2005-04-16 15:20:36 -07002152 sb->s_magic = UDF_SUPER_MAGIC;
2153 sb->s_time_gran = 1000;
2154
Jan Kara403460052009-03-19 16:21:38 +01002155 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
2156 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2157 } else {
Martin K. Petersene1defc42009-05-22 17:17:49 -04002158 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
Jan Kara403460052009-03-19 16:21:38 +01002159 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
Jan Karad759bfa42013-07-25 19:10:59 +02002160 if (ret == -EAGAIN && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
Jan Kara403460052009-03-19 16:21:38 +01002161 if (!silent)
Joe Perches78ace702011-10-10 01:08:05 -07002162 pr_notice("Rescanning with blocksize %d\n",
2163 UDF_DEFAULT_BLOCKSIZE);
Ashish Sangwandc141a42012-07-21 16:35:17 +05302164 brelse(sbi->s_lvid_bh);
2165 sbi->s_lvid_bh = NULL;
Jan Kara403460052009-03-19 16:21:38 +01002166 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
2167 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2168 }
2169 }
Jan Karad759bfa42013-07-25 19:10:59 +02002170 if (ret < 0) {
2171 if (ret == -EAGAIN) {
2172 udf_warn(sb, "No partition found (1)\n");
2173 ret = -EINVAL;
2174 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175 goto error_out;
2176 }
2177
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002178 udf_debug("Lastblock=%d\n", sbi->s_last_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002179
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002180 if (sbi->s_lvid_bh) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002181 struct logicalVolIntegrityDescImpUse *lvidiu =
Jan Kara69d75672013-09-12 22:00:15 +02002182 udf_sb_lvidiu(sb);
2183 uint16_t minUDFReadRev;
2184 uint16_t minUDFWriteRev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002185
Jan Kara69d75672013-09-12 22:00:15 +02002186 if (!lvidiu) {
2187 ret = -EINVAL;
2188 goto error_out;
2189 }
2190 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2191 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002192 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
Joe Perches78ace702011-10-10 01:08:05 -07002193 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
Jan Kara69d75672013-09-12 22:00:15 +02002194 minUDFReadRev,
Joe Perches78ace702011-10-10 01:08:05 -07002195 UDF_MAX_READ_VERSION);
Jan Karad759bfa42013-07-25 19:10:59 +02002196 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002197 goto error_out;
Jan Karae729eac2013-07-25 16:15:16 +02002198 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION &&
2199 !(sb->s_flags & MS_RDONLY)) {
2200 ret = -EACCES;
2201 goto error_out;
2202 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002203
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002204 sbi->s_udfrev = minUDFWriteRev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002205
2206 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2207 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2208 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2209 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2210 }
2211
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002212 if (!sbi->s_partitions) {
Joe Perches78ace702011-10-10 01:08:05 -07002213 udf_warn(sb, "No partition found (2)\n");
Jan Karad759bfa42013-07-25 19:10:59 +02002214 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002215 goto error_out;
2216 }
2217
Marcin Slusarz4b111112008-02-08 04:20:36 -08002218 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
Jan Karae729eac2013-07-25 16:15:16 +02002219 UDF_PART_FLAG_READ_ONLY &&
2220 !(sb->s_flags & MS_RDONLY)) {
2221 ret = -EACCES;
2222 goto error_out;
Peter Osterlundc1a26e72006-10-05 21:17:50 +02002223 }
Eric Sandeen39b3f6d2006-09-29 01:59:41 -07002224
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002225 if (udf_find_fileset(sb, &fileset, &rootdir)) {
Joe Perches78ace702011-10-10 01:08:05 -07002226 udf_warn(sb, "No fileset found\n");
Jan Karad759bfa42013-07-25 19:10:59 +02002227 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002228 goto error_out;
2229 }
2230
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002231 if (!silent) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002232 struct timestamp ts;
Marcin Slusarz56774802008-02-10 11:25:31 +01002233 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
Joe Perches78ace702011-10-10 01:08:05 -07002234 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2235 sbi->s_volume_ident,
2236 le16_to_cpu(ts.year), ts.month, ts.day,
Marcin Slusarz56774802008-02-10 11:25:31 +01002237 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002238 }
Jan Kara9181f8b2015-08-20 14:50:07 +02002239 if (!(sb->s_flags & MS_RDONLY)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002240 udf_open_lvid(sb);
Jan Kara9181f8b2015-08-20 14:50:07 +02002241 lvid_open = true;
2242 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243
2244 /* Assign the root inode */
2245 /* assign inodes by physical block number */
2246 /* perhaps it's not extensible enough, but for now ... */
Pekka Enberg97e961f2008-10-15 12:29:03 +02002247 inode = udf_iget(sb, &rootdir);
Jan Kara6d3d5e82014-09-04 16:15:51 +02002248 if (IS_ERR(inode)) {
Joe Perches78ace702011-10-10 01:08:05 -07002249 udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002250 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
Jan Kara6d3d5e82014-09-04 16:15:51 +02002251 ret = PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002252 goto error_out;
2253 }
2254
2255 /* Allocate a dentry for the root inode */
Al Viro48fde702012-01-08 22:15:13 -05002256 sb->s_root = d_make_root(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002257 if (!sb->s_root) {
Joe Perches78ace702011-10-10 01:08:05 -07002258 udf_err(sb, "Couldn't allocate root dentry\n");
Jan Karad759bfa42013-07-25 19:10:59 +02002259 ret = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002260 goto error_out;
2261 }
Jan Kara31170b62007-05-08 00:35:21 -07002262 sb->s_maxbytes = MAX_LFS_FILESIZE;
Al Viro8de52772012-02-06 12:45:27 -05002263 sb->s_max_links = UDF_MAX_LINKS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002264 return 0;
2265
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002266error_out:
Markus Elfring0d454e42014-11-18 17:17:46 +01002267 iput(sbi->s_vat_inode);
Markus Elfringfdf26572014-11-18 18:29:10 +01002268parse_options_failure:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002269#ifdef CONFIG_UDF_NLS
2270 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002271 unload_nls(sbi->s_nls_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002272#endif
Jan Kara9181f8b2015-08-20 14:50:07 +02002273 if (lvid_open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002274 udf_close_lvid(sb);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002275 brelse(sbi->s_lvid_bh);
Jan Karabff943a2012-06-27 22:27:05 +02002276 udf_sb_free_partitions(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277 kfree(sbi);
2278 sb->s_fs_info = NULL;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002279
Jan Karad759bfa42013-07-25 19:10:59 +02002280 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281}
2282
Joe Perches8076c362011-10-10 01:08:03 -07002283void _udf_err(struct super_block *sb, const char *function,
2284 const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285{
Joe Perchesc2bff362011-10-10 01:08:06 -07002286 struct va_format vaf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002287 va_list args;
2288
Linus Torvalds1da177e2005-04-16 15:20:36 -07002289 va_start(args, fmt);
Joe Perchesc2bff362011-10-10 01:08:06 -07002290
2291 vaf.fmt = fmt;
2292 vaf.va = &args;
2293
2294 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2295
Linus Torvalds1da177e2005-04-16 15:20:36 -07002296 va_end(args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002297}
2298
Joe Perchesa40ecd72011-10-10 01:08:04 -07002299void _udf_warn(struct super_block *sb, const char *function,
2300 const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002301{
Joe Perchesc2bff362011-10-10 01:08:06 -07002302 struct va_format vaf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002303 va_list args;
2304
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002305 va_start(args, fmt);
Joe Perchesc2bff362011-10-10 01:08:06 -07002306
2307 vaf.fmt = fmt;
2308 vaf.va = &args;
2309
2310 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2311
Linus Torvalds1da177e2005-04-16 15:20:36 -07002312 va_end(args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002313}
2314
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002315static void udf_put_super(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002316{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002317 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002318
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002319 sbi = UDF_SB(sb);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +02002320
Markus Elfring0d454e42014-11-18 17:17:46 +01002321 iput(sbi->s_vat_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002322#ifdef CONFIG_UDF_NLS
2323 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002324 unload_nls(sbi->s_nls_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002325#endif
2326 if (!(sb->s_flags & MS_RDONLY))
2327 udf_close_lvid(sb);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002328 brelse(sbi->s_lvid_bh);
Jan Karabff943a2012-06-27 22:27:05 +02002329 udf_sb_free_partitions(sb);
Fabian Frederickbbe48dd2015-01-10 19:13:32 +01002330 mutex_destroy(&sbi->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002331 kfree(sb->s_fs_info);
2332 sb->s_fs_info = NULL;
2333}
2334
Jan Kara146bca72009-03-16 18:27:37 +01002335static int udf_sync_fs(struct super_block *sb, int wait)
2336{
2337 struct udf_sb_info *sbi = UDF_SB(sb);
2338
2339 mutex_lock(&sbi->s_alloc_mutex);
2340 if (sbi->s_lvid_dirty) {
2341 /*
2342 * Blockdevice will be synced later so we don't have to submit
2343 * the buffer for IO
2344 */
2345 mark_buffer_dirty(sbi->s_lvid_bh);
Jan Kara146bca72009-03-16 18:27:37 +01002346 sbi->s_lvid_dirty = 0;
2347 }
2348 mutex_unlock(&sbi->s_alloc_mutex);
2349
2350 return 0;
2351}
2352
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002353static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002354{
David Howells726c3342006-06-23 02:02:58 -07002355 struct super_block *sb = dentry->d_sb;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002356 struct udf_sb_info *sbi = UDF_SB(sb);
2357 struct logicalVolIntegrityDescImpUse *lvidiu;
Coly Li557f5a12009-01-20 01:36:55 +08002358 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002359
Jan Kara69d75672013-09-12 22:00:15 +02002360 lvidiu = udf_sb_lvidiu(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002361 buf->f_type = UDF_SUPER_MAGIC;
2362 buf->f_bsize = sb->s_blocksize;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002363 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002364 buf->f_bfree = udf_count_free(sb);
2365 buf->f_bavail = buf->f_bfree;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002366 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2367 le32_to_cpu(lvidiu->numDirs)) : 0)
2368 + buf->f_bfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369 buf->f_ffree = buf->f_bfree;
Andrew Gabbasov9fba7052016-01-15 02:44:21 -06002370 buf->f_namelen = UDF_NAME_LEN;
Coly Li557f5a12009-01-20 01:36:55 +08002371 buf->f_fsid.val[0] = (u32)id;
2372 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002373
2374 return 0;
2375}
2376
Marcin Slusarz4b111112008-02-08 04:20:36 -08002377static unsigned int udf_count_free_bitmap(struct super_block *sb,
2378 struct udf_bitmap *bitmap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002379{
2380 struct buffer_head *bh = NULL;
2381 unsigned int accum = 0;
2382 int index;
2383 int block = 0, newblock;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002384 struct kernel_lb_addr loc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002385 uint32_t bytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002386 uint8_t *ptr;
2387 uint16_t ident;
2388 struct spaceBitmapDesc *bm;
2389
Linus Torvalds1da177e2005-04-16 15:20:36 -07002390 loc.logicalBlockNum = bitmap->s_extPosition;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002391 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
Pekka Enberg97e961f2008-10-15 12:29:03 +02002392 bh = udf_read_ptagged(sb, &loc, 0, &ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002394 if (!bh) {
Joe Perches78ace702011-10-10 01:08:05 -07002395 udf_err(sb, "udf_count_free failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002396 goto out;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002397 } else if (ident != TAG_IDENT_SBD) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002398 brelse(bh);
Joe Perches78ace702011-10-10 01:08:05 -07002399 udf_err(sb, "udf_count_free failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002400 goto out;
2401 }
2402
2403 bm = (struct spaceBitmapDesc *)bh->b_data;
2404 bytes = le32_to_cpu(bm->numOfBytes);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002405 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2406 ptr = (uint8_t *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002407
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002408 while (bytes > 0) {
Marcin Slusarz01b954a2008-02-02 22:37:07 +01002409 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2410 accum += bitmap_weight((const unsigned long *)(ptr + index),
2411 cur_bytes * 8);
2412 bytes -= cur_bytes;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002413 if (bytes) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002414 brelse(bh);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002415 newblock = udf_get_lb_pblock(sb, &loc, ++block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002416 bh = udf_tread(sb, newblock);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002417 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418 udf_debug("read failed\n");
2419 goto out;
2420 }
2421 index = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002422 ptr = (uint8_t *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423 }
2424 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07002425 brelse(bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002426out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427 return accum;
2428}
2429
Marcin Slusarz4b111112008-02-08 04:20:36 -08002430static unsigned int udf_count_free_table(struct super_block *sb,
2431 struct inode *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002432{
2433 unsigned int accum = 0;
Jan Karaff116fc2007-05-08 00:35:14 -07002434 uint32_t elen;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002435 struct kernel_lb_addr eloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002436 int8_t etype;
Jan Karaff116fc2007-05-08 00:35:14 -07002437 struct extent_position epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002438
Jan Karad1668fe2010-10-20 23:24:12 +02002439 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
Marcin Slusarzc0b34432008-02-08 04:20:42 -08002440 epos.block = UDF_I(table)->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -07002441 epos.offset = sizeof(struct unallocSpaceEntry);
2442 epos.bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002443
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002444 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002445 accum += (elen >> table->i_sb->s_blocksize_bits);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002446
Jan Kara3bf25cb2007-05-08 00:35:16 -07002447 brelse(epos.bh);
Jan Karad1668fe2010-10-20 23:24:12 +02002448 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002449
2450 return accum;
2451}
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002452
2453static unsigned int udf_count_free(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002454{
2455 unsigned int accum = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002456 struct udf_sb_info *sbi;
2457 struct udf_part_map *map;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002458
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002459 sbi = UDF_SB(sb);
2460 if (sbi->s_lvid_bh) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002461 struct logicalVolIntegrityDesc *lvid =
2462 (struct logicalVolIntegrityDesc *)
2463 sbi->s_lvid_bh->b_data;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002464 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002465 accum = le32_to_cpu(
2466 lvid->freeSpaceTable[sbi->s_partition]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002467 if (accum == 0xFFFFFFFF)
2468 accum = 0;
2469 }
2470 }
2471
2472 if (accum)
2473 return accum;
2474
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002475 map = &sbi->s_partmaps[sbi->s_partition];
2476 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002477 accum += udf_count_free_bitmap(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002478 map->s_uspace.s_bitmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002479 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002480 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002481 accum += udf_count_free_bitmap(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002482 map->s_fspace.s_bitmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002483 }
2484 if (accum)
2485 return accum;
2486
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002487 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002488 accum += udf_count_free_table(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002489 map->s_uspace.s_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002490 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002491 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002492 accum += udf_count_free_table(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002493 map->s_fspace.s_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002494 }
2495
2496 return accum;
2497}