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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * super.c
3 *
4 * PURPOSE
5 * Super block routines for the OSTA-UDF(tm) filesystem.
6 *
7 * DESCRIPTION
8 * OSTA-UDF(tm) = Optical Storage Technology Association
9 * Universal Disk Format.
10 *
11 * This code is based on version 2.00 of the UDF specification,
12 * and revision 3 of the ECMA 167 standard [equivalent to ISO 13346].
13 * http://www.osta.org/
14 * http://www.ecma.ch/
15 * http://www.iso.org/
16 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 * COPYRIGHT
18 * This file is distributed under the terms of the GNU General Public
19 * License (GPL). Copies of the GPL can be obtained from:
20 * ftp://prep.ai.mit.edu/pub/gnu/GPL
21 * Each contributing author retains all rights to their own work.
22 *
23 * (C) 1998 Dave Boynton
24 * (C) 1998-2004 Ben Fennema
25 * (C) 2000 Stelias Computing Inc
26 *
27 * HISTORY
28 *
29 * 09/24/98 dgb changed to allow compiling outside of kernel, and
30 * added some debugging.
31 * 10/01/98 dgb updated to allow (some) possibility of compiling w/2.0.34
32 * 10/16/98 attempting some multi-session support
33 * 10/17/98 added freespace count for "df"
34 * 11/11/98 gr added novrs option
35 * 11/26/98 dgb added fileset,anchor mount options
Marcin Slusarz3a71fc52008-02-08 04:20:28 -080036 * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced
37 * vol descs. rewrote option handling based on isofs
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 * 12/20/98 find the free space bitmap (if it exists)
39 */
40
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070041#include "udfdecl.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/blkdev.h>
44#include <linux/slab.h>
45#include <linux/kernel.h>
46#include <linux/module.h>
47#include <linux/parser.h>
48#include <linux/stat.h>
49#include <linux/cdrom.h>
50#include <linux/nls.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#include <linux/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
Jan Kara4b8d4252018-02-09 12:52:28 +010067enum {
68 VDS_POS_PRIMARY_VOL_DESC,
69 VDS_POS_UNALLOC_SPACE_DESC,
70 VDS_POS_LOGICAL_VOL_DESC,
Jan Kara4b8d4252018-02-09 12:52:28 +010071 VDS_POS_IMP_USE_VOL_DESC,
Jan Kara4b8d4252018-02-09 12:52:28 +010072 VDS_POS_LENGTH
73};
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Peter A. Felvegi44499602013-10-18 20:07:44 +020075#define VSD_FIRST_SECTOR_OFFSET 32768
76#define VSD_MAX_SECTOR_OFFSET 0x800000
77
Alden Tondettara47241c2016-04-25 19:27:56 -070078/*
79 * Maximum number of Terminating Descriptor / Logical Volume Integrity
80 * Descriptor redirections. The chosen numbers are arbitrary - just that we
81 * hopefully don't limit any real use of rewritten inode on write-once media
82 * but avoid looping for too long on corrupted media.
83 */
84#define UDF_MAX_TD_NESTING 64
85#define UDF_MAX_LVID_NESTING 1000
86
Al Viro8de52772012-02-06 12:45:27 -050087enum { UDF_MAX_LINKS = 0xffff };
88
Linus Torvalds1da177e2005-04-16 15:20:36 -070089/* These are the "meat" - everything else is stuffing */
90static int udf_fill_super(struct super_block *, void *, int);
91static void udf_put_super(struct super_block *);
Jan Kara146bca72009-03-16 18:27:37 +010092static int udf_sync_fs(struct super_block *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093static int udf_remount_fs(struct super_block *, int *, char *);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020094static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020095static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
96 struct kernel_lb_addr *);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070097static void udf_load_fileset(struct super_block *, struct buffer_head *,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020098 struct kernel_lb_addr *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070099static void udf_open_lvid(struct super_block *);
100static void udf_close_lvid(struct super_block *);
101static unsigned int udf_count_free(struct super_block *);
David Howells726c3342006-06-23 02:02:58 -0700102static int udf_statfs(struct dentry *, struct kstatfs *);
Al Viro34c80b12011-12-08 21:32:45 -0500103static int udf_show_options(struct seq_file *, struct dentry *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Jan Kara69d75672013-09-12 22:00:15 +0200105struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800106{
Jan Kara69d75672013-09-12 22:00:15 +0200107 struct logicalVolIntegrityDesc *lvid;
108 unsigned int partnum;
109 unsigned int offset;
110
111 if (!UDF_SB(sb)->s_lvid_bh)
112 return NULL;
113 lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
114 partnum = le32_to_cpu(lvid->numOfPartitions);
115 if ((sb->s_blocksize - sizeof(struct logicalVolIntegrityDescImpUse) -
116 offsetof(struct logicalVolIntegrityDesc, impUse)) /
117 (2 * sizeof(uint32_t)) < partnum) {
118 udf_err(sb, "Logical volume integrity descriptor corrupted "
119 "(numOfPartitions = %u)!\n", partnum);
120 return NULL;
121 }
122 /* The offset is to skip freeSpaceTable and sizeTable arrays */
123 offset = partnum * 2 * sizeof(uint32_t);
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800124 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
125}
126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127/* UDF filesystem type */
Al Viro152a0832010-07-25 00:46:55 +0400128static struct dentry *udf_mount(struct file_system_type *fs_type,
129 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130{
Al Viro152a0832010-07-25 00:46:55 +0400131 return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132}
133
134static struct file_system_type udf_fstype = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700135 .owner = THIS_MODULE,
136 .name = "udf",
Al Viro152a0832010-07-25 00:46:55 +0400137 .mount = udf_mount,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700138 .kill_sb = kill_block_super,
139 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140};
Eric W. Biederman3e64fe52013-03-11 07:05:42 -0700141MODULE_ALIAS_FS("udf");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700143static struct kmem_cache *udf_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
145static struct inode *udf_alloc_inode(struct super_block *sb)
146{
147 struct udf_inode_info *ei;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800148 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 if (!ei)
150 return NULL;
Dan Bastone95f87972006-08-13 23:24:18 -0700151
152 ei->i_unique = 0;
153 ei->i_lenExtents = 0;
154 ei->i_next_alloc_block = 0;
155 ei->i_next_alloc_goal = 0;
156 ei->i_strat4096 = 0;
Alessio Igor Bogani4d0fb622010-11-16 18:40:47 +0100157 init_rwsem(&ei->i_data_sem);
Namjae Jeon99600052013-01-19 11:17:14 +0900158 ei->cached_extent.lstart = -1;
159 spin_lock_init(&ei->i_extent_cache_lock);
Dan Bastone95f87972006-08-13 23:24:18 -0700160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 return &ei->vfs_inode;
162}
163
Al Viroa78bb382019-04-15 22:25:06 -0400164static void udf_free_in_core_inode(struct inode *inode)
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100165{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100166 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
167}
168
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700169static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700171 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
Christoph Lametera35afb82007-05-16 22:10:57 -0700173 ei->i_ext.i_data = NULL;
174 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175}
176
Fabian Frederick53ea18d2014-02-01 15:45:18 +0800177static int __init init_inodecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178{
179 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
180 sizeof(struct udf_inode_info),
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700181 0, (SLAB_RECLAIM_ACCOUNT |
Vladimir Davydov5d097052016-01-14 15:18:21 -0800182 SLAB_MEM_SPREAD |
183 SLAB_ACCOUNT),
Paul Mundt20c2df82007-07-20 10:11:58 +0900184 init_once);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700185 if (!udf_inode_cachep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 return -ENOMEM;
187 return 0;
188}
189
190static void destroy_inodecache(void)
191{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +1000192 /*
193 * Make sure all delayed rcu free inodes are flushed before we
194 * destroy cache.
195 */
196 rcu_barrier();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700197 kmem_cache_destroy(udf_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198}
199
200/* Superblock operations */
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800201static const struct super_operations udf_sb_ops = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700202 .alloc_inode = udf_alloc_inode,
Al Viroa78bb382019-04-15 22:25:06 -0400203 .free_inode = udf_free_in_core_inode,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700204 .write_inode = udf_write_inode,
Al Viro3aac2b62010-06-07 00:43:39 -0400205 .evict_inode = udf_evict_inode,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700206 .put_super = udf_put_super,
Jan Kara146bca72009-03-16 18:27:37 +0100207 .sync_fs = udf_sync_fs,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700208 .statfs = udf_statfs,
209 .remount_fs = udf_remount_fs,
Miklos Szeredi6da80892008-02-08 04:21:50 -0800210 .show_options = udf_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211};
212
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700213struct udf_options {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 unsigned char novrs;
215 unsigned int blocksize;
216 unsigned int session;
217 unsigned int lastblock;
218 unsigned int anchor;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 unsigned int flags;
Al Virofaa17292011-07-26 03:18:29 -0400220 umode_t umask;
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -0800221 kgid_t gid;
222 kuid_t uid;
Al Virofaa17292011-07-26 03:18:29 -0400223 umode_t fmode;
224 umode_t dmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 struct nls_table *nls_map;
226};
227
228static int __init init_udf_fs(void)
229{
230 int err;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700231
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 err = init_inodecache();
233 if (err)
234 goto out1;
235 err = register_filesystem(&udf_fstype);
236 if (err)
237 goto out;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700238
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 return 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700240
241out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 destroy_inodecache();
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700243
244out1:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 return err;
246}
247
248static void __exit exit_udf_fs(void)
249{
250 unregister_filesystem(&udf_fstype);
251 destroy_inodecache();
252}
253
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -0800254static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
255{
256 struct udf_sb_info *sbi = UDF_SB(sb);
257
Markus Elfring033c9da2017-08-15 16:45:44 +0200258 sbi->s_partmaps = kcalloc(count, sizeof(*sbi->s_partmaps), GFP_KERNEL);
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -0800259 if (!sbi->s_partmaps) {
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -0800260 sbi->s_partitions = 0;
261 return -ENOMEM;
262 }
263
264 sbi->s_partitions = count;
265 return 0;
266}
267
Jan Karabff943a2012-06-27 22:27:05 +0200268static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
269{
270 int i;
271 int nr_groups = bitmap->s_nr_groups;
Jan Karabff943a2012-06-27 22:27:05 +0200272
273 for (i = 0; i < nr_groups; i++)
274 if (bitmap->s_block_bitmap[i])
275 brelse(bitmap->s_block_bitmap[i]);
276
Tetsuo Handa1d5cfdb2016-01-22 15:11:02 -0800277 kvfree(bitmap);
Jan Karabff943a2012-06-27 22:27:05 +0200278}
279
280static void udf_free_partition(struct udf_part_map *map)
281{
282 int i;
283 struct udf_meta_data *mdata;
284
285 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
286 iput(map->s_uspace.s_table);
Jan Karabff943a2012-06-27 22:27:05 +0200287 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
288 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
Jan Karabff943a2012-06-27 22:27:05 +0200289 if (map->s_partition_type == UDF_SPARABLE_MAP15)
290 for (i = 0; i < 4; i++)
291 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
292 else if (map->s_partition_type == UDF_METADATA_MAP25) {
293 mdata = &map->s_type_specific.s_metadata;
294 iput(mdata->s_metadata_fe);
295 mdata->s_metadata_fe = NULL;
296
297 iput(mdata->s_mirror_fe);
298 mdata->s_mirror_fe = NULL;
299
300 iput(mdata->s_bitmap_fe);
301 mdata->s_bitmap_fe = NULL;
302 }
303}
304
305static void udf_sb_free_partitions(struct super_block *sb)
306{
307 struct udf_sb_info *sbi = UDF_SB(sb);
308 int i;
Markus Elfringba2eb862017-08-15 17:03:06 +0200309
310 if (!sbi->s_partmaps)
Namjae Jeon1b1baff2013-01-14 22:53:47 +0100311 return;
Jan Karabff943a2012-06-27 22:27:05 +0200312 for (i = 0; i < sbi->s_partitions; i++)
313 udf_free_partition(&sbi->s_partmaps[i]);
314 kfree(sbi->s_partmaps);
315 sbi->s_partmaps = NULL;
316}
317
Al Viro34c80b12011-12-08 21:32:45 -0500318static int udf_show_options(struct seq_file *seq, struct dentry *root)
Miklos Szeredi6da80892008-02-08 04:21:50 -0800319{
Al Viro34c80b12011-12-08 21:32:45 -0500320 struct super_block *sb = root->d_sb;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800321 struct udf_sb_info *sbi = UDF_SB(sb);
322
323 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
324 seq_puts(seq, ",nostrict");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +0100325 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
Miklos Szeredi6da80892008-02-08 04:21:50 -0800326 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
327 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
328 seq_puts(seq, ",unhide");
329 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
330 seq_puts(seq, ",undelete");
331 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
332 seq_puts(seq, ",noadinicb");
333 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
334 seq_puts(seq, ",shortad");
335 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
336 seq_puts(seq, ",uid=forget");
Miklos Szeredi6da80892008-02-08 04:21:50 -0800337 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
338 seq_puts(seq, ",gid=forget");
Miklos Szeredi6da80892008-02-08 04:21:50 -0800339 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -0800340 seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
Miklos Szeredi6da80892008-02-08 04:21:50 -0800341 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -0800342 seq_printf(seq, ",gid=%u", from_kgid(&init_user_ns, sbi->s_gid));
Miklos Szeredi6da80892008-02-08 04:21:50 -0800343 if (sbi->s_umask != 0)
Al Virofaa17292011-07-26 03:18:29 -0400344 seq_printf(seq, ",umask=%ho", sbi->s_umask);
Marcin Slusarz87bc7302008-12-02 13:40:11 +0100345 if (sbi->s_fmode != UDF_INVALID_MODE)
Al Virofaa17292011-07-26 03:18:29 -0400346 seq_printf(seq, ",mode=%ho", sbi->s_fmode);
Marcin Slusarz87bc7302008-12-02 13:40:11 +0100347 if (sbi->s_dmode != UDF_INVALID_MODE)
Al Virofaa17292011-07-26 03:18:29 -0400348 seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
Miklos Szeredi6da80892008-02-08 04:21:50 -0800349 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
Steve Magnanifcbf7632017-10-12 08:48:41 -0500350 seq_printf(seq, ",session=%d", sbi->s_session);
Miklos Szeredi6da80892008-02-08 04:21:50 -0800351 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
352 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
Jan Kara403460052009-03-19 16:21:38 +0100353 if (sbi->s_anchor != 0)
354 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
Miklos Szeredi6da80892008-02-08 04:21:50 -0800355 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
356 seq_puts(seq, ",utf8");
357 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
358 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
359
360 return 0;
361}
362
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363/*
364 * udf_parse_options
365 *
366 * PURPOSE
367 * Parse mount options.
368 *
369 * DESCRIPTION
370 * The following mount options are supported:
371 *
372 * gid= Set the default group.
373 * umask= Set the default umask.
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100374 * mode= Set the default file permissions.
375 * dmode= Set the default directory permissions.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 * uid= Set the default user.
377 * bs= Set the block size.
378 * unhide Show otherwise hidden files.
379 * undelete Show deleted files in lists.
380 * adinicb Embed data in the inode (default)
381 * noadinicb Don't embed data in the inode
382 * shortad Use short ad's
383 * longad Use long ad's (default)
384 * nostrict Unset strict conformance
385 * iocharset= Set the NLS character set
386 *
387 * The remaining are for debugging and disaster recovery:
388 *
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700389 * novrs Skip volume sequence recognition
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 *
391 * The following expect a offset from 0.
392 *
393 * session= Set the CDROM session (default= last session)
394 * anchor= Override standard anchor location. (default= 256)
395 * volume= Override the VolumeDesc location. (unused)
396 * partition= Override the PartitionDesc location. (unused)
397 * lastblock= Set the last block of the filesystem/
398 *
399 * The following expect a offset from the partition root.
400 *
401 * fileset= Override the fileset block location. (unused)
402 * rootdir= Override the root directory location. (unused)
403 * WARNING: overriding the rootdir to a non-directory may
404 * yield highly unpredictable results.
405 *
406 * PRE-CONDITIONS
407 * options Pointer to mount options string.
408 * uopts Pointer to mount options variable.
409 *
410 * POST-CONDITIONS
411 * <return> 1 Mount options parsed okay.
412 * <return> 0 Error parsing mount options.
413 *
414 * HISTORY
415 * July 1, 1997 - Andrew E. Mileski
416 * Written, tested, and released.
417 */
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700418
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419enum {
420 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
421 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
422 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
423 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
424 Opt_rootdir, Opt_utf8, Opt_iocharset,
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100425 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
426 Opt_fmode, Opt_dmode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427};
428
Steven Whitehousea447c092008-10-13 10:46:57 +0100429static const match_table_t tokens = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700430 {Opt_novrs, "novrs"},
431 {Opt_nostrict, "nostrict"},
432 {Opt_bs, "bs=%u"},
433 {Opt_unhide, "unhide"},
434 {Opt_undelete, "undelete"},
435 {Opt_noadinicb, "noadinicb"},
436 {Opt_adinicb, "adinicb"},
437 {Opt_shortad, "shortad"},
438 {Opt_longad, "longad"},
439 {Opt_uforget, "uid=forget"},
440 {Opt_uignore, "uid=ignore"},
441 {Opt_gforget, "gid=forget"},
442 {Opt_gignore, "gid=ignore"},
443 {Opt_gid, "gid=%u"},
444 {Opt_uid, "uid=%u"},
445 {Opt_umask, "umask=%o"},
446 {Opt_session, "session=%u"},
447 {Opt_lastblock, "lastblock=%u"},
448 {Opt_anchor, "anchor=%u"},
449 {Opt_volume, "volume=%u"},
450 {Opt_partition, "partition=%u"},
451 {Opt_fileset, "fileset=%u"},
452 {Opt_rootdir, "rootdir=%u"},
453 {Opt_utf8, "utf8"},
454 {Opt_iocharset, "iocharset=%s"},
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100455 {Opt_fmode, "mode=%o"},
456 {Opt_dmode, "dmode=%o"},
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700457 {Opt_err, NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458};
459
Miklos Szeredi6da80892008-02-08 04:21:50 -0800460static int udf_parse_options(char *options, struct udf_options *uopt,
461 bool remount)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462{
463 char *p;
464 int option;
465
466 uopt->novrs = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 uopt->session = 0xFFFFFFFF;
468 uopt->lastblock = 0;
469 uopt->anchor = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
471 if (!options)
472 return 1;
473
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700474 while ((p = strsep(&options, ",")) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 substring_t args[MAX_OPT_ARGS];
476 int token;
Fabian Frederick8c6915a2014-01-29 17:13:16 +0800477 unsigned n;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 if (!*p)
479 continue;
480
481 token = match_token(p, tokens, args);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700482 switch (token) {
483 case Opt_novrs:
484 uopt->novrs = 1;
Clemens Ladisch41368012009-03-06 09:16:49 +0100485 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700486 case Opt_bs:
487 if (match_int(&args[0], &option))
488 return 0;
Fabian Frederick8c6915a2014-01-29 17:13:16 +0800489 n = option;
490 if (n != 512 && n != 1024 && n != 2048 && n != 4096)
491 return 0;
492 uopt->blocksize = n;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +0100493 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700494 break;
495 case Opt_unhide:
496 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
497 break;
498 case Opt_undelete:
499 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
500 break;
501 case Opt_noadinicb:
502 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
503 break;
504 case Opt_adinicb:
505 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
506 break;
507 case Opt_shortad:
508 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
509 break;
510 case Opt_longad:
511 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
512 break;
513 case Opt_gid:
514 if (match_int(args, &option))
515 return 0;
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -0800516 uopt->gid = make_kgid(current_user_ns(), option);
517 if (!gid_valid(uopt->gid))
518 return 0;
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -0700519 uopt->flags |= (1 << UDF_FLAG_GID_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700520 break;
521 case Opt_uid:
522 if (match_int(args, &option))
523 return 0;
Eric W. Biedermanc2ba1382012-02-10 12:20:35 -0800524 uopt->uid = make_kuid(current_user_ns(), option);
525 if (!uid_valid(uopt->uid))
526 return 0;
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -0700527 uopt->flags |= (1 << UDF_FLAG_UID_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700528 break;
529 case Opt_umask:
530 if (match_octal(args, &option))
531 return 0;
532 uopt->umask = option;
533 break;
534 case Opt_nostrict:
535 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
536 break;
537 case Opt_session:
538 if (match_int(args, &option))
539 return 0;
540 uopt->session = option;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800541 if (!remount)
542 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700543 break;
544 case Opt_lastblock:
545 if (match_int(args, &option))
546 return 0;
547 uopt->lastblock = option;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800548 if (!remount)
549 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700550 break;
551 case Opt_anchor:
552 if (match_int(args, &option))
553 return 0;
554 uopt->anchor = option;
555 break;
556 case Opt_volume:
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700557 case Opt_partition:
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700558 case Opt_fileset:
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700559 case Opt_rootdir:
Jan Karaf0c4a812018-02-22 14:33:04 +0100560 /* Ignored (never implemented properly) */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700561 break;
562 case Opt_utf8:
563 uopt->flags |= (1 << UDF_FLAG_UTF8);
564 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700565 case Opt_iocharset:
Chengguang Xu785dffe2018-02-25 21:25:07 +0800566 if (!remount) {
567 if (uopt->nls_map)
568 unload_nls(uopt->nls_map);
Jan Karaa768a9a2019-03-19 09:48:59 +0100569 /*
570 * load_nls() failure is handled later in
571 * udf_fill_super() after all options are
572 * parsed.
573 */
Chengguang Xu785dffe2018-02-25 21:25:07 +0800574 uopt->nls_map = load_nls(args[0].from);
575 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
576 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700577 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700578 case Opt_uforget:
579 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
580 break;
Jan Kara70260e42018-02-21 17:27:44 +0100581 case Opt_uignore:
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700582 case Opt_gignore:
Jan Kara70260e42018-02-21 17:27:44 +0100583 /* These options are superseeded by uid=<number> */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700584 break;
585 case Opt_gforget:
586 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
587 break;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100588 case Opt_fmode:
589 if (match_octal(args, &option))
590 return 0;
591 uopt->fmode = option & 0777;
592 break;
593 case Opt_dmode:
594 if (match_octal(args, &option))
595 return 0;
596 uopt->dmode = option & 0777;
597 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700598 default:
Joe Perches78ace70c2011-10-10 01:08:05 -0700599 pr_err("bad mount option \"%s\" or missing value\n", p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 return 0;
601 }
602 }
603 return 1;
604}
605
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700606static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607{
608 struct udf_options uopt;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800609 struct udf_sb_info *sbi = UDF_SB(sb);
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400610 int error = 0;
Jan Karaa9ad01b2018-09-06 15:56:10 +0200611
612 if (!(*flags & SB_RDONLY) && UDF_QUERY_FLAG(sb, UDF_FLAG_RW_INCOMPAT))
613 return -EACCES;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614
Theodore Ts'o02b99842014-03-13 10:14:33 -0400615 sync_filesystem(sb);
Jan Karae729eac2013-07-25 16:15:16 +0200616
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800617 uopt.flags = sbi->s_flags;
618 uopt.uid = sbi->s_uid;
619 uopt.gid = sbi->s_gid;
620 uopt.umask = sbi->s_umask;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100621 uopt.fmode = sbi->s_fmode;
622 uopt.dmode = sbi->s_dmode;
Chengguang Xu785dffe2018-02-25 21:25:07 +0800623 uopt.nls_map = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624
Miklos Szeredi6da80892008-02-08 04:21:50 -0800625 if (!udf_parse_options(options, &uopt, true))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 return -EINVAL;
627
Jan Karac03cad22010-10-20 22:17:28 +0200628 write_lock(&sbi->s_cred_lock);
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800629 sbi->s_flags = uopt.flags;
630 sbi->s_uid = uopt.uid;
631 sbi->s_gid = uopt.gid;
632 sbi->s_umask = uopt.umask;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +0100633 sbi->s_fmode = uopt.fmode;
634 sbi->s_dmode = uopt.dmode;
Jan Karac03cad22010-10-20 22:17:28 +0200635 write_unlock(&sbi->s_cred_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636
Linus Torvalds1751e8a2017-11-27 13:05:09 -0800637 if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb))
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400638 goto out_unlock;
639
Linus Torvalds1751e8a2017-11-27 13:05:09 -0800640 if (*flags & SB_RDONLY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 udf_close_lvid(sb);
Jan Kara36350462010-05-19 16:28:56 +0200642 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 udf_open_lvid(sb);
644
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400645out_unlock:
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400646 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647}
648
Jan Kara403460052009-03-19 16:21:38 +0100649/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
650/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
651static loff_t udf_check_vsd(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652{
653 struct volStructDesc *vsd = NULL;
Peter A. Felvegi44499602013-10-18 20:07:44 +0200654 loff_t sector = VSD_FIRST_SECTOR_OFFSET;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 int sectorsize;
656 struct buffer_head *bh = NULL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700657 int nsr02 = 0;
658 int nsr03 = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800659 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800661 sbi = UDF_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 if (sb->s_blocksize < sizeof(struct volStructDesc))
663 sectorsize = sizeof(struct volStructDesc);
664 else
665 sectorsize = sb->s_blocksize;
666
Jan Karaabdc0eb2017-10-16 11:38:11 +0200667 sector += (((loff_t)sbi->s_session) << sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668
Steve Magnanifcbf7632017-10-12 08:48:41 -0500669 udf_debug("Starting at sector %u (%lu byte sectors)\n",
Sebastian Manciulea706047a2008-04-14 17:13:01 +0200670 (unsigned int)(sector >> sb->s_blocksize_bits),
671 sb->s_blocksize);
Peter A. Felvegi44499602013-10-18 20:07:44 +0200672 /* Process the sequence (if applicable). The hard limit on the sector
673 * offset is arbitrary, hopefully large enough so that all valid UDF
674 * filesystems will be recognised. There is no mention of an upper
675 * bound to the size of the volume recognition area in the standard.
676 * The limit will prevent the code to read all the sectors of a
677 * specially crafted image (like a bluray disc full of CD001 sectors),
678 * potentially causing minutes or even hours of uninterruptible I/O
679 * activity. This actually happened with uninitialised SSD partitions
680 * (all 0xFF) before the check for the limit and all valid IDs were
681 * added */
682 for (; !nsr02 && !nsr03 && sector < VSD_MAX_SECTOR_OFFSET;
683 sector += sectorsize) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 /* Read a block */
685 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
686 if (!bh)
687 break;
688
689 /* Look for ISO descriptors */
690 vsd = (struct volStructDesc *)(bh->b_data +
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800691 (sector & (sb->s_blocksize - 1)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692
Peter A. Felvegi44499602013-10-18 20:07:44 +0200693 if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800694 VSD_STD_ID_LEN)) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700695 switch (vsd->structType) {
696 case 0:
697 udf_debug("ISO9660 Boot Record found\n");
698 break;
699 case 1:
Joe Perchesa983f362011-10-10 01:08:07 -0700700 udf_debug("ISO9660 Primary Volume Descriptor found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700701 break;
702 case 2:
Joe Perchesa983f362011-10-10 01:08:07 -0700703 udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700704 break;
705 case 3:
Joe Perchesa983f362011-10-10 01:08:07 -0700706 udf_debug("ISO9660 Volume Partition Descriptor found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700707 break;
708 case 255:
Joe Perchesa983f362011-10-10 01:08:07 -0700709 udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700710 break;
711 default:
712 udf_debug("ISO9660 VRS (%u) found\n",
713 vsd->structType);
714 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 }
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800716 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
717 VSD_STD_ID_LEN))
718 ; /* nothing */
719 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
720 VSD_STD_ID_LEN)) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700721 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 break;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800723 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
724 VSD_STD_ID_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 nsr02 = sector;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800726 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
727 VSD_STD_ID_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 nsr03 = sector;
Peter A. Felvegi44499602013-10-18 20:07:44 +0200729 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BOOT2,
730 VSD_STD_ID_LEN))
731 ; /* nothing */
732 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CDW02,
733 VSD_STD_ID_LEN))
734 ; /* nothing */
735 else {
736 /* invalid id : end of volume recognition area */
737 brelse(bh);
738 break;
739 }
Jan Kara3bf25cb2007-05-08 00:35:16 -0700740 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 }
742
743 if (nsr03)
744 return nsr03;
745 else if (nsr02)
746 return nsr02;
Peter A. Felvegi44499602013-10-18 20:07:44 +0200747 else if (!bh && sector - (sbi->s_session << sb->s_blocksize_bits) ==
748 VSD_FIRST_SECTOR_OFFSET)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 return -1;
750 else
751 return 0;
752}
753
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800754static int udf_find_fileset(struct super_block *sb,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200755 struct kernel_lb_addr *fileset,
756 struct kernel_lb_addr *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757{
758 struct buffer_head *bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 uint16_t ident;
760
761 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700762 fileset->partitionReferenceNum != 0xFFFF) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200763 bh = udf_read_ptagged(sb, fileset, 0, &ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700765 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 return 1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700767 } else if (ident != TAG_IDENT_FSD) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700768 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 return 1;
770 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700771
Steve Magnanifcbf7632017-10-12 08:48:41 -0500772 udf_debug("Fileset at block=%u, partition=%u\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700773 fileset->logicalBlockNum,
774 fileset->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
Jan Kara82c82ab2018-08-21 12:00:08 +0200776 UDF_SB(sb)->s_partition = fileset->partitionReferenceNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 udf_load_fileset(sb, bh, root);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700778 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 return 0;
780 }
781 return 1;
782}
783
Jan Karad759bfa42013-07-25 19:10:59 +0200784/*
785 * Load primary Volume Descriptor Sequence
786 *
787 * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
788 * should be tried.
789 */
Jan Karac0eb31e2008-04-01 16:50:35 +0200790static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791{
792 struct primaryVolDesc *pvoldesc;
Andrew Gabbasov9293fcf2016-01-15 02:44:22 -0600793 uint8_t *outstr;
Jan Karac0eb31e2008-04-01 16:50:35 +0200794 struct buffer_head *bh;
795 uint16_t ident;
Jan Karad759bfa42013-07-25 19:10:59 +0200796 int ret = -ENOMEM;
Deepa Dinamani0220edd2018-05-10 08:26:17 -0700797#ifdef UDFFS_DEBUG
798 struct timestamp *ts;
799#endif
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100800
Andrew Gabbasov9293fcf2016-01-15 02:44:22 -0600801 outstr = kmalloc(128, GFP_NOFS);
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100802 if (!outstr)
Andrew Gabbasov9293fcf2016-01-15 02:44:22 -0600803 return -ENOMEM;
Jan Karac0eb31e2008-04-01 16:50:35 +0200804
805 bh = udf_read_tagged(sb, block, block, &ident);
Jan Karad759bfa42013-07-25 19:10:59 +0200806 if (!bh) {
807 ret = -EAGAIN;
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100808 goto out2;
Jan Karad759bfa42013-07-25 19:10:59 +0200809 }
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100810
Jan Karad759bfa42013-07-25 19:10:59 +0200811 if (ident != TAG_IDENT_PVD) {
812 ret = -EIO;
813 goto out_bh;
814 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815
816 pvoldesc = (struct primaryVolDesc *)bh->b_data;
817
Deepa Dinamani0220edd2018-05-10 08:26:17 -0700818 udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
819 pvoldesc->recordingDateAndTime);
Marcin Slusarzaf15a292008-02-10 11:29:10 +0100820#ifdef UDFFS_DEBUG
Deepa Dinamani0220edd2018-05-10 08:26:17 -0700821 ts = &pvoldesc->recordingDateAndTime;
822 udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
823 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
824 ts->minute, le16_to_cpu(ts->typeAndTimezone));
Marcin Slusarzaf15a292008-02-10 11:29:10 +0100825#endif
Deepa Dinamani0220edd2018-05-10 08:26:17 -0700826
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827
Jan Karae966fc8d2018-04-16 15:44:19 +0200828 ret = udf_dstrCS0toChar(sb, outstr, 31, pvoldesc->volIdent, 32);
Jan Karab54e41f2018-11-16 13:43:17 +0100829 if (ret < 0) {
830 strcpy(UDF_SB(sb)->s_volume_ident, "InvalidName");
831 pr_warn("incorrect volume identification, setting to "
832 "'InvalidName'\n");
833 } else {
834 strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret);
835 }
Andrew Gabbasov9293fcf2016-01-15 02:44:22 -0600836 udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837
Jan Karae966fc8d2018-04-16 15:44:19 +0200838 ret = udf_dstrCS0toChar(sb, outstr, 127, pvoldesc->volSetIdent, 128);
Jan Karab54e41f2018-11-16 13:43:17 +0100839 if (ret < 0) {
840 ret = 0;
Andrew Gabbasov9293fcf2016-01-15 02:44:22 -0600841 goto out_bh;
Jan Karab54e41f2018-11-16 13:43:17 +0100842 }
Andrew Gabbasov9293fcf2016-01-15 02:44:22 -0600843 outstr[ret] = 0;
844 udf_debug("volSetIdent[] = '%s'\n", outstr);
Jan Karac0eb31e2008-04-01 16:50:35 +0200845
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100846 ret = 0;
Jan Karad759bfa42013-07-25 19:10:59 +0200847out_bh:
848 brelse(bh);
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100849out2:
850 kfree(outstr);
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100851 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852}
853
Namjae Jeon3080a742011-10-23 19:28:32 +0900854struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
Alden Tondettar78888242016-05-18 14:09:19 -0700855 u32 meta_file_loc, u32 partition_ref)
Namjae Jeon3080a742011-10-23 19:28:32 +0900856{
857 struct kernel_lb_addr addr;
858 struct inode *metadata_fe;
859
860 addr.logicalBlockNum = meta_file_loc;
Alden Tondettar78888242016-05-18 14:09:19 -0700861 addr.partitionReferenceNum = partition_ref;
Namjae Jeon3080a742011-10-23 19:28:32 +0900862
Jan Kara6174c2e2014-10-09 12:52:16 +0200863 metadata_fe = udf_iget_special(sb, &addr);
Namjae Jeon3080a742011-10-23 19:28:32 +0900864
Jan Kara6d3d5e82014-09-04 16:15:51 +0200865 if (IS_ERR(metadata_fe)) {
Namjae Jeon3080a742011-10-23 19:28:32 +0900866 udf_warn(sb, "metadata inode efe not found\n");
Jan Kara6d3d5e82014-09-04 16:15:51 +0200867 return metadata_fe;
868 }
869 if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
Namjae Jeon3080a742011-10-23 19:28:32 +0900870 udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
871 iput(metadata_fe);
Jan Kara6d3d5e82014-09-04 16:15:51 +0200872 return ERR_PTR(-EIO);
Namjae Jeon3080a742011-10-23 19:28:32 +0900873 }
874
875 return metadata_fe;
876}
877
Alden Tondettar78888242016-05-18 14:09:19 -0700878static int udf_load_metadata_files(struct super_block *sb, int partition,
879 int type1_index)
Jan Karabfb257a2008-04-08 20:37:21 +0200880{
881 struct udf_sb_info *sbi = UDF_SB(sb);
882 struct udf_part_map *map;
883 struct udf_meta_data *mdata;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200884 struct kernel_lb_addr addr;
Jan Kara6d3d5e82014-09-04 16:15:51 +0200885 struct inode *fe;
Jan Karabfb257a2008-04-08 20:37:21 +0200886
887 map = &sbi->s_partmaps[partition];
888 mdata = &map->s_type_specific.s_metadata;
Alden Tondettar78888242016-05-18 14:09:19 -0700889 mdata->s_phys_partition_ref = type1_index;
Jan Karabfb257a2008-04-08 20:37:21 +0200890
891 /* metadata address */
Steve Magnanifcbf7632017-10-12 08:48:41 -0500892 udf_debug("Metadata file location: block = %u part = %u\n",
Alden Tondettar78888242016-05-18 14:09:19 -0700893 mdata->s_meta_file_loc, mdata->s_phys_partition_ref);
Jan Karabfb257a2008-04-08 20:37:21 +0200894
Jan Kara6d3d5e82014-09-04 16:15:51 +0200895 fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc,
Alden Tondettar78888242016-05-18 14:09:19 -0700896 mdata->s_phys_partition_ref);
Jan Kara6d3d5e82014-09-04 16:15:51 +0200897 if (IS_ERR(fe)) {
Namjae Jeon3080a742011-10-23 19:28:32 +0900898 /* mirror file entry */
Steve Magnanifcbf7632017-10-12 08:48:41 -0500899 udf_debug("Mirror metadata file location: block = %u part = %u\n",
Alden Tondettar78888242016-05-18 14:09:19 -0700900 mdata->s_mirror_file_loc, mdata->s_phys_partition_ref);
Jan Karabfb257a2008-04-08 20:37:21 +0200901
Jan Kara6d3d5e82014-09-04 16:15:51 +0200902 fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc,
Alden Tondettar78888242016-05-18 14:09:19 -0700903 mdata->s_phys_partition_ref);
Jan Karabfb257a2008-04-08 20:37:21 +0200904
Jan Kara6d3d5e82014-09-04 16:15:51 +0200905 if (IS_ERR(fe)) {
Namjae Jeon3080a742011-10-23 19:28:32 +0900906 udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
Jan Kara6d3d5e82014-09-04 16:15:51 +0200907 return PTR_ERR(fe);
Namjae Jeon3080a742011-10-23 19:28:32 +0900908 }
Jan Kara6d3d5e82014-09-04 16:15:51 +0200909 mdata->s_mirror_fe = fe;
910 } else
911 mdata->s_metadata_fe = fe;
912
Jan Karabfb257a2008-04-08 20:37:21 +0200913
914 /*
915 * bitmap file entry
916 * Note:
917 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
918 */
919 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
920 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
Alden Tondettar78888242016-05-18 14:09:19 -0700921 addr.partitionReferenceNum = mdata->s_phys_partition_ref;
Jan Karabfb257a2008-04-08 20:37:21 +0200922
Steve Magnanifcbf7632017-10-12 08:48:41 -0500923 udf_debug("Bitmap file location: block = %u part = %u\n",
Joe Perchesa983f362011-10-10 01:08:07 -0700924 addr.logicalBlockNum, addr.partitionReferenceNum);
Jan Karabfb257a2008-04-08 20:37:21 +0200925
Jan Kara6174c2e2014-10-09 12:52:16 +0200926 fe = udf_iget_special(sb, &addr);
Jan Kara6d3d5e82014-09-04 16:15:51 +0200927 if (IS_ERR(fe)) {
David Howellsbc98a422017-07-17 08:45:34 +0100928 if (sb_rdonly(sb))
Joe Perchesa40ecd72011-10-10 01:08:04 -0700929 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 +0200930 else {
Joe Perches8076c362011-10-10 01:08:03 -0700931 udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
Jan Kara6d3d5e82014-09-04 16:15:51 +0200932 return PTR_ERR(fe);
Jan Karabfb257a2008-04-08 20:37:21 +0200933 }
Jan Kara6d3d5e82014-09-04 16:15:51 +0200934 } else
935 mdata->s_bitmap_fe = fe;
Jan Karabfb257a2008-04-08 20:37:21 +0200936 }
937
938 udf_debug("udf_load_metadata_files Ok\n");
Jan Karabfb257a2008-04-08 20:37:21 +0200939 return 0;
Jan Karabfb257a2008-04-08 20:37:21 +0200940}
941
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700942static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200943 struct kernel_lb_addr *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944{
945 struct fileSetDesc *fset;
946
947 fset = (struct fileSetDesc *)bh->b_data;
948
949 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
950
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800951 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952
Steve Magnanifcbf7632017-10-12 08:48:41 -0500953 udf_debug("Rootdir at block=%u, partition=%u\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700954 root->logicalBlockNum, root->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955}
956
Marcin Slusarz883cb9d12008-02-08 04:20:34 -0800957int udf_compute_nr_groups(struct super_block *sb, u32 partition)
958{
959 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
Julia Lawall8dee00b2008-02-14 16:15:45 +0100960 return DIV_ROUND_UP(map->s_partition_len +
961 (sizeof(struct spaceBitmapDesc) << 3),
962 sb->s_blocksize * 8);
Marcin Slusarz883cb9d12008-02-08 04:20:34 -0800963}
964
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800965static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
966{
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800967 struct udf_bitmap *bitmap;
968 int nr_groups;
969 int size;
970
Marcin Slusarz883cb9d12008-02-08 04:20:34 -0800971 nr_groups = udf_compute_nr_groups(sb, index);
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800972 size = sizeof(struct udf_bitmap) +
973 (sizeof(struct buffer_head *) * nr_groups);
974
975 if (size <= PAGE_SIZE)
Joe Perchesed2ae6f2010-11-04 20:08:04 -0700976 bitmap = kzalloc(size, GFP_KERNEL);
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800977 else
Joe Perchesed2ae6f2010-11-04 20:08:04 -0700978 bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800979
Markus Elfringba2eb862017-08-15 17:03:06 +0200980 if (!bitmap)
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800981 return NULL;
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800982
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800983 bitmap->s_nr_groups = nr_groups;
984 return bitmap;
985}
986
Jan Karab085fbe2018-09-06 15:46:17 +0200987static int check_partition_desc(struct super_block *sb,
988 struct partitionDesc *p,
989 struct udf_part_map *map)
990{
991 bool umap, utable, fmap, ftable;
992 struct partitionHeaderDesc *phd;
993
994 switch (le32_to_cpu(p->accessType)) {
995 case PD_ACCESS_TYPE_READ_ONLY:
996 case PD_ACCESS_TYPE_WRITE_ONCE:
997 case PD_ACCESS_TYPE_REWRITABLE:
998 case PD_ACCESS_TYPE_NONE:
999 goto force_ro;
1000 }
1001
1002 /* No Partition Header Descriptor? */
1003 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1004 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1005 goto force_ro;
1006
1007 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1008 utable = phd->unallocSpaceTable.extLength;
1009 umap = phd->unallocSpaceBitmap.extLength;
1010 ftable = phd->freedSpaceTable.extLength;
1011 fmap = phd->freedSpaceBitmap.extLength;
1012
1013 /* No allocation info? */
1014 if (!utable && !umap && !ftable && !fmap)
1015 goto force_ro;
1016
1017 /* We don't support blocks that require erasing before overwrite */
1018 if (ftable || fmap)
1019 goto force_ro;
1020 /* UDF 2.60: 2.3.3 - no mixing of tables & bitmaps, no VAT. */
1021 if (utable && umap)
1022 goto force_ro;
1023
1024 if (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
1025 map->s_partition_type == UDF_VIRTUAL_MAP20)
1026 goto force_ro;
1027
1028 return 0;
1029force_ro:
1030 if (!sb_rdonly(sb))
1031 return -EACCES;
1032 UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
1033 return 0;
1034}
1035
Jan Kara3fb38df2008-04-02 12:26:36 +02001036static int udf_fill_partdesc_info(struct super_block *sb,
1037 struct partitionDesc *p, int p_index)
1038{
1039 struct udf_part_map *map;
1040 struct udf_sb_info *sbi = UDF_SB(sb);
1041 struct partitionHeaderDesc *phd;
Jan Karab085fbe2018-09-06 15:46:17 +02001042 int err;
Jan Kara3fb38df2008-04-02 12:26:36 +02001043
1044 map = &sbi->s_partmaps[p_index];
1045
1046 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
1047 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
1048
1049 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
1050 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
1051 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
1052 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
1053 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
1054 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
1055 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
1056 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1057
Steve Magnanifcbf7632017-10-12 08:48:41 -05001058 udf_debug("Partition (%d type %x) starts at physical %u, block length %u\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001059 p_index, map->s_partition_type,
1060 map->s_partition_root, map->s_partition_len);
Jan Kara3fb38df2008-04-02 12:26:36 +02001061
Jan Karab085fbe2018-09-06 15:46:17 +02001062 err = check_partition_desc(sb, p, map);
1063 if (err)
1064 return err;
1065
1066 /*
1067 * Skip loading allocation info it we cannot ever write to the fs.
1068 * This is a correctness thing as we may have decided to force ro mount
1069 * to avoid allocation info we don't support.
1070 */
1071 if (UDF_QUERY_FLAG(sb, UDF_FLAG_RW_INCOMPAT))
Jan Kara3fb38df2008-04-02 12:26:36 +02001072 return 0;
1073
1074 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1075 if (phd->unallocSpaceTable.extLength) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001076 struct kernel_lb_addr loc = {
Jan Kara3fb38df2008-04-02 12:26:36 +02001077 .logicalBlockNum = le32_to_cpu(
1078 phd->unallocSpaceTable.extPosition),
1079 .partitionReferenceNum = p_index,
1080 };
Jan Kara6d3d5e82014-09-04 16:15:51 +02001081 struct inode *inode;
Jan Kara3fb38df2008-04-02 12:26:36 +02001082
Jan Kara6174c2e2014-10-09 12:52:16 +02001083 inode = udf_iget_special(sb, &loc);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001084 if (IS_ERR(inode)) {
Jan Kara3fb38df2008-04-02 12:26:36 +02001085 udf_debug("cannot load unallocSpaceTable (part %d)\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001086 p_index);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001087 return PTR_ERR(inode);
Jan Kara3fb38df2008-04-02 12:26:36 +02001088 }
Jan Kara6d3d5e82014-09-04 16:15:51 +02001089 map->s_uspace.s_table = inode;
Jan Kara3fb38df2008-04-02 12:26:36 +02001090 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
Steve Magnanifcbf7632017-10-12 08:48:41 -05001091 udf_debug("unallocSpaceTable (part %d) @ %lu\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001092 p_index, map->s_uspace.s_table->i_ino);
Jan Kara3fb38df2008-04-02 12:26:36 +02001093 }
1094
1095 if (phd->unallocSpaceBitmap.extLength) {
1096 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1097 if (!bitmap)
Jan Karad759bfa42013-07-25 19:10:59 +02001098 return -ENOMEM;
Jan Kara3fb38df2008-04-02 12:26:36 +02001099 map->s_uspace.s_bitmap = bitmap;
Jan Kara3fb38df2008-04-02 12:26:36 +02001100 bitmap->s_extPosition = le32_to_cpu(
1101 phd->unallocSpaceBitmap.extPosition);
1102 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
Steve Magnanifcbf7632017-10-12 08:48:41 -05001103 udf_debug("unallocSpaceBitmap (part %d) @ %u\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001104 p_index, bitmap->s_extPosition);
Jan Kara3fb38df2008-04-02 12:26:36 +02001105 }
1106
Jan Kara3fb38df2008-04-02 12:26:36 +02001107 return 0;
1108}
1109
Jan Karae971b0b2009-11-30 19:47:55 +01001110static void udf_find_vat_block(struct super_block *sb, int p_index,
1111 int type1_index, sector_t start_block)
1112{
1113 struct udf_sb_info *sbi = UDF_SB(sb);
1114 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1115 sector_t vat_block;
1116 struct kernel_lb_addr ino;
Jan Kara6d3d5e82014-09-04 16:15:51 +02001117 struct inode *inode;
Jan Karae971b0b2009-11-30 19:47:55 +01001118
1119 /*
1120 * VAT file entry is in the last recorded block. Some broken disks have
1121 * it a few blocks before so try a bit harder...
1122 */
1123 ino.partitionReferenceNum = type1_index;
1124 for (vat_block = start_block;
1125 vat_block >= map->s_partition_root &&
Jan Kara6d3d5e82014-09-04 16:15:51 +02001126 vat_block >= start_block - 3; vat_block--) {
Jan Karae971b0b2009-11-30 19:47:55 +01001127 ino.logicalBlockNum = vat_block - map->s_partition_root;
Jan Kara6174c2e2014-10-09 12:52:16 +02001128 inode = udf_iget_special(sb, &ino);
Jan Kara6d3d5e82014-09-04 16:15:51 +02001129 if (!IS_ERR(inode)) {
1130 sbi->s_vat_inode = inode;
1131 break;
1132 }
Jan Karae971b0b2009-11-30 19:47:55 +01001133 }
1134}
1135
Jan Kara38b74a52008-04-02 16:01:35 +02001136static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1137{
1138 struct udf_sb_info *sbi = UDF_SB(sb);
1139 struct udf_part_map *map = &sbi->s_partmaps[p_index];
Jan Karafa5e0812008-04-08 02:08:53 +02001140 struct buffer_head *bh = NULL;
1141 struct udf_inode_info *vati;
1142 uint32_t pos;
1143 struct virtualAllocationTable20 *vat20;
Fabian Frederick23bcda12017-01-06 21:54:41 +01001144 sector_t blocks = i_size_read(sb->s_bdev->bd_inode) >>
1145 sb->s_blocksize_bits;
Jan Kara38b74a52008-04-02 16:01:35 +02001146
Jan Karae971b0b2009-11-30 19:47:55 +01001147 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
Jan Kara4bf17af2009-07-14 19:30:23 +02001148 if (!sbi->s_vat_inode &&
1149 sbi->s_last_block != blocks - 1) {
Joe Perches78ace70c2011-10-10 01:08:05 -07001150 pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n",
1151 (unsigned long)sbi->s_last_block,
1152 (unsigned long)blocks - 1);
Jan Karae971b0b2009-11-30 19:47:55 +01001153 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
Jan Kara4bf17af2009-07-14 19:30:23 +02001154 }
Jan Kara38b74a52008-04-02 16:01:35 +02001155 if (!sbi->s_vat_inode)
Jan Karad759bfa42013-07-25 19:10:59 +02001156 return -EIO;
Jan Kara38b74a52008-04-02 16:01:35 +02001157
1158 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
Sebastian Manciulea47c93582008-04-14 17:06:36 +02001159 map->s_type_specific.s_virtual.s_start_offset = 0;
Jan Kara38b74a52008-04-02 16:01:35 +02001160 map->s_type_specific.s_virtual.s_num_entries =
1161 (sbi->s_vat_inode->i_size - 36) >> 2;
1162 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
Jan Karafa5e0812008-04-08 02:08:53 +02001163 vati = UDF_I(sbi->s_vat_inode);
1164 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1165 pos = udf_block_map(sbi->s_vat_inode, 0);
1166 bh = sb_bread(sb, pos);
1167 if (!bh)
Jan Karad759bfa42013-07-25 19:10:59 +02001168 return -EIO;
Jan Karafa5e0812008-04-08 02:08:53 +02001169 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1170 } else {
1171 vat20 = (struct virtualAllocationTable20 *)
1172 vati->i_ext.i_data;
1173 }
Jan Kara38b74a52008-04-02 16:01:35 +02001174
Jan Kara38b74a52008-04-02 16:01:35 +02001175 map->s_type_specific.s_virtual.s_start_offset =
Sebastian Manciulea47c93582008-04-14 17:06:36 +02001176 le16_to_cpu(vat20->lengthHeader);
Jan Kara38b74a52008-04-02 16:01:35 +02001177 map->s_type_specific.s_virtual.s_num_entries =
1178 (sbi->s_vat_inode->i_size -
1179 map->s_type_specific.s_virtual.
1180 s_start_offset) >> 2;
1181 brelse(bh);
1182 }
1183 return 0;
1184}
1185
Jan Karad759bfa42013-07-25 19:10:59 +02001186/*
1187 * Load partition descriptor block
1188 *
1189 * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
1190 * sequence.
1191 */
Jan Karac0eb31e2008-04-01 16:50:35 +02001192static int udf_load_partdesc(struct super_block *sb, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193{
Jan Karac0eb31e2008-04-01 16:50:35 +02001194 struct buffer_head *bh;
Jan Karac0eb31e2008-04-01 16:50:35 +02001195 struct partitionDesc *p;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001196 struct udf_part_map *map;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001197 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Kara38b74a52008-04-02 16:01:35 +02001198 int i, type1_idx;
Jan Karac0eb31e2008-04-01 16:50:35 +02001199 uint16_t partitionNumber;
1200 uint16_t ident;
Jan Karad759bfa42013-07-25 19:10:59 +02001201 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202
Jan Karac0eb31e2008-04-01 16:50:35 +02001203 bh = udf_read_tagged(sb, block, block, &ident);
1204 if (!bh)
Jan Karad759bfa42013-07-25 19:10:59 +02001205 return -EAGAIN;
1206 if (ident != TAG_IDENT_PD) {
1207 ret = 0;
Jan Karac0eb31e2008-04-01 16:50:35 +02001208 goto out_bh;
Jan Karad759bfa42013-07-25 19:10:59 +02001209 }
Jan Karac0eb31e2008-04-01 16:50:35 +02001210
1211 p = (struct partitionDesc *)bh->b_data;
1212 partitionNumber = le16_to_cpu(p->partitionNumber);
Jan Kara38b74a52008-04-02 16:01:35 +02001213
Alden Tondettar78888242016-05-18 14:09:19 -07001214 /* First scan for TYPE1 and SPARABLE partitions */
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001215 for (i = 0; i < sbi->s_partitions; i++) {
1216 map = &sbi->s_partmaps[i];
Steve Magnanifcbf7632017-10-12 08:48:41 -05001217 udf_debug("Searching map: (%u == %u)\n",
Marcin Slusarz165923f2008-02-10 11:33:08 +01001218 map->s_partition_num, partitionNumber);
Jan Kara38b74a52008-04-02 16:01:35 +02001219 if (map->s_partition_num == partitionNumber &&
1220 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1221 map->s_partition_type == UDF_SPARABLE_MAP15))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 break;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001223 }
1224
Jan Kara38b74a52008-04-02 16:01:35 +02001225 if (i >= sbi->s_partitions) {
Steve Magnanifcbf7632017-10-12 08:48:41 -05001226 udf_debug("Partition (%u) not found in partition map\n",
Marcin Slusarz165923f2008-02-10 11:33:08 +01001227 partitionNumber);
Jan Karad759bfa42013-07-25 19:10:59 +02001228 ret = 0;
Jan Karac0eb31e2008-04-01 16:50:35 +02001229 goto out_bh;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001230 }
1231
Jan Kara3fb38df2008-04-02 12:26:36 +02001232 ret = udf_fill_partdesc_info(sb, p, i);
Jan Karad759bfa42013-07-25 19:10:59 +02001233 if (ret < 0)
1234 goto out_bh;
Jan Kara38b74a52008-04-02 16:01:35 +02001235
1236 /*
Jan Karabfb257a2008-04-08 20:37:21 +02001237 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1238 * PHYSICAL partitions are already set up
Jan Kara38b74a52008-04-02 16:01:35 +02001239 */
1240 type1_idx = i;
Peter A. Felvegi44499602013-10-18 20:07:44 +02001241#ifdef UDFFS_DEBUG
1242 map = NULL; /* supress 'maybe used uninitialized' warning */
1243#endif
Jan Kara38b74a52008-04-02 16:01:35 +02001244 for (i = 0; i < sbi->s_partitions; i++) {
1245 map = &sbi->s_partmaps[i];
1246
1247 if (map->s_partition_num == partitionNumber &&
1248 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
Jan Karabfb257a2008-04-08 20:37:21 +02001249 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1250 map->s_partition_type == UDF_METADATA_MAP25))
Jan Kara38b74a52008-04-02 16:01:35 +02001251 break;
1252 }
1253
Jan Karad759bfa42013-07-25 19:10:59 +02001254 if (i >= sbi->s_partitions) {
1255 ret = 0;
Jan Kara38b74a52008-04-02 16:01:35 +02001256 goto out_bh;
Jan Karad759bfa42013-07-25 19:10:59 +02001257 }
Jan Kara38b74a52008-04-02 16:01:35 +02001258
1259 ret = udf_fill_partdesc_info(sb, p, i);
Jan Karad759bfa42013-07-25 19:10:59 +02001260 if (ret < 0)
Jan Kara38b74a52008-04-02 16:01:35 +02001261 goto out_bh;
1262
Jan Karabfb257a2008-04-08 20:37:21 +02001263 if (map->s_partition_type == UDF_METADATA_MAP25) {
Alden Tondettar78888242016-05-18 14:09:19 -07001264 ret = udf_load_metadata_files(sb, i, type1_idx);
Jan Karad759bfa42013-07-25 19:10:59 +02001265 if (ret < 0) {
Joe Perches78ace70c2011-10-10 01:08:05 -07001266 udf_err(sb, "error loading MetaData partition map %d\n",
1267 i);
Jan Karabfb257a2008-04-08 20:37:21 +02001268 goto out_bh;
1269 }
1270 } else {
Jan Karae729eac2013-07-25 16:15:16 +02001271 /*
1272 * If we have a partition with virtual map, we don't handle
1273 * writing to it (we overwrite blocks instead of relocating
1274 * them).
1275 */
David Howellsbc98a422017-07-17 08:45:34 +01001276 if (!sb_rdonly(sb)) {
Jan Karae729eac2013-07-25 16:15:16 +02001277 ret = -EACCES;
1278 goto out_bh;
1279 }
Jan Karaa9ad01b2018-09-06 15:56:10 +02001280 UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
Jan Karabfb257a2008-04-08 20:37:21 +02001281 ret = udf_load_vat(sb, i, type1_idx);
Jan Karad759bfa42013-07-25 19:10:59 +02001282 if (ret < 0)
Jan Karabfb257a2008-04-08 20:37:21 +02001283 goto out_bh;
Jan Karabfb257a2008-04-08 20:37:21 +02001284 }
Jan Karad759bfa42013-07-25 19:10:59 +02001285 ret = 0;
Jan Karac0eb31e2008-04-01 16:50:35 +02001286out_bh:
Jan Kara2e0838f2008-04-01 18:08:51 +02001287 /* In case loading failed, we handle cleanup in udf_fill_super */
Jan Karac0eb31e2008-04-01 16:50:35 +02001288 brelse(bh);
1289 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290}
1291
Jan Kara1df2ae32012-06-27 21:23:07 +02001292static int udf_load_sparable_map(struct super_block *sb,
1293 struct udf_part_map *map,
1294 struct sparablePartitionMap *spm)
1295{
1296 uint32_t loc;
1297 uint16_t ident;
1298 struct sparingTable *st;
1299 struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing;
1300 int i;
1301 struct buffer_head *bh;
1302
1303 map->s_partition_type = UDF_SPARABLE_MAP15;
1304 sdata->s_packet_len = le16_to_cpu(spm->packetLength);
1305 if (!is_power_of_2(sdata->s_packet_len)) {
1306 udf_err(sb, "error loading logical volume descriptor: "
1307 "Invalid packet length %u\n",
1308 (unsigned)sdata->s_packet_len);
1309 return -EIO;
1310 }
1311 if (spm->numSparingTables > 4) {
1312 udf_err(sb, "error loading logical volume descriptor: "
1313 "Too many sparing tables (%d)\n",
1314 (int)spm->numSparingTables);
1315 return -EIO;
1316 }
1317
1318 for (i = 0; i < spm->numSparingTables; i++) {
1319 loc = le32_to_cpu(spm->locSparingTable[i]);
1320 bh = udf_read_tagged(sb, loc, loc, &ident);
1321 if (!bh)
1322 continue;
1323
1324 st = (struct sparingTable *)bh->b_data;
1325 if (ident != 0 ||
1326 strncmp(st->sparingIdent.ident, UDF_ID_SPARING,
1327 strlen(UDF_ID_SPARING)) ||
1328 sizeof(*st) + le16_to_cpu(st->reallocationTableLen) >
1329 sb->s_blocksize) {
1330 brelse(bh);
1331 continue;
1332 }
1333
1334 sdata->s_spar_map[i] = bh;
1335 }
1336 map->s_partition_func = udf_get_pblock_spar15;
1337 return 0;
1338}
1339
Jan Karac0eb31e2008-04-01 16:50:35 +02001340static int udf_load_logicalvol(struct super_block *sb, sector_t block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001341 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342{
1343 struct logicalVolDesc *lvd;
Jan Kara1df2ae32012-06-27 21:23:07 +02001344 int i, offset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345 uint8_t type;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001346 struct udf_sb_info *sbi = UDF_SB(sb);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001347 struct genericPartitionMap *gpm;
Jan Karac0eb31e2008-04-01 16:50:35 +02001348 uint16_t ident;
1349 struct buffer_head *bh;
Jan Karaadee11b2012-06-27 20:20:22 +02001350 unsigned int table_len;
Jan Karad759bfa42013-07-25 19:10:59 +02001351 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352
Jan Karac0eb31e2008-04-01 16:50:35 +02001353 bh = udf_read_tagged(sb, block, block, &ident);
1354 if (!bh)
Jan Karad759bfa42013-07-25 19:10:59 +02001355 return -EAGAIN;
Jan Karac0eb31e2008-04-01 16:50:35 +02001356 BUG_ON(ident != TAG_IDENT_LVD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357 lvd = (struct logicalVolDesc *)bh->b_data;
Jan Karaadee11b2012-06-27 20:20:22 +02001358 table_len = le32_to_cpu(lvd->mapTableLength);
Jan Kara57b96552012-07-10 17:58:04 +02001359 if (table_len > sb->s_blocksize - sizeof(*lvd)) {
Jan Karaadee11b2012-06-27 20:20:22 +02001360 udf_err(sb, "error loading logical volume descriptor: "
1361 "Partition table too long (%u > %lu)\n", table_len,
1362 sb->s_blocksize - sizeof(*lvd));
Jan Karad759bfa42013-07-25 19:10:59 +02001363 ret = -EIO;
Jan Karaadee11b2012-06-27 20:20:22 +02001364 goto out_bh;
1365 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366
Jan Karacb14d342012-06-27 20:08:44 +02001367 ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
1368 if (ret)
Jan Karac0eb31e2008-04-01 16:50:35 +02001369 goto out_bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001371 for (i = 0, offset = 0;
Jan Karaadee11b2012-06-27 20:20:22 +02001372 i < sbi->s_partitions && offset < table_len;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001373 i++, offset += gpm->partitionMapLength) {
1374 struct udf_part_map *map = &sbi->s_partmaps[i];
1375 gpm = (struct genericPartitionMap *)
1376 &(lvd->partitionMaps[offset]);
1377 type = gpm->partitionMapType;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001378 if (type == 1) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001379 struct genericPartitionMap1 *gpm1 =
1380 (struct genericPartitionMap1 *)gpm;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001381 map->s_partition_type = UDF_TYPE1_MAP15;
1382 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1383 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1384 map->s_partition_func = NULL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001385 } else if (type == 2) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001386 struct udfPartitionMap2 *upm2 =
1387 (struct udfPartitionMap2 *)gpm;
1388 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1389 strlen(UDF_ID_VIRTUAL))) {
1390 u16 suf =
1391 le16_to_cpu(((__le16 *)upm2->partIdent.
1392 identSuffix)[0]);
Jan Karac82a1272008-04-08 01:16:32 +02001393 if (suf < 0x0200) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001394 map->s_partition_type =
1395 UDF_VIRTUAL_MAP15;
1396 map->s_partition_func =
1397 udf_get_pblock_virt15;
Jan Karac82a1272008-04-08 01:16:32 +02001398 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001399 map->s_partition_type =
1400 UDF_VIRTUAL_MAP20;
1401 map->s_partition_func =
1402 udf_get_pblock_virt20;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403 }
Marcin Slusarz4b111112008-02-08 04:20:36 -08001404 } else if (!strncmp(upm2->partIdent.ident,
1405 UDF_ID_SPARABLE,
1406 strlen(UDF_ID_SPARABLE))) {
Jan Karad759bfa42013-07-25 19:10:59 +02001407 ret = udf_load_sparable_map(sb, map,
1408 (struct sparablePartitionMap *)gpm);
1409 if (ret < 0)
Jan Kara1df2ae32012-06-27 21:23:07 +02001410 goto out_bh;
Jan Karabfb257a2008-04-08 20:37:21 +02001411 } else if (!strncmp(upm2->partIdent.ident,
1412 UDF_ID_METADATA,
1413 strlen(UDF_ID_METADATA))) {
1414 struct udf_meta_data *mdata =
1415 &map->s_type_specific.s_metadata;
1416 struct metadataPartitionMap *mdm =
1417 (struct metadataPartitionMap *)
1418 &(lvd->partitionMaps[offset]);
Steve Magnanifcbf7632017-10-12 08:48:41 -05001419 udf_debug("Parsing Logical vol part %d type %u id=%s\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001420 i, type, UDF_ID_METADATA);
Jan Karabfb257a2008-04-08 20:37:21 +02001421
1422 map->s_partition_type = UDF_METADATA_MAP25;
1423 map->s_partition_func = udf_get_pblock_meta25;
1424
1425 mdata->s_meta_file_loc =
1426 le32_to_cpu(mdm->metadataFileLoc);
1427 mdata->s_mirror_file_loc =
1428 le32_to_cpu(mdm->metadataMirrorFileLoc);
1429 mdata->s_bitmap_file_loc =
1430 le32_to_cpu(mdm->metadataBitmapFileLoc);
1431 mdata->s_alloc_unit_size =
1432 le32_to_cpu(mdm->allocUnitSize);
1433 mdata->s_align_unit_size =
1434 le16_to_cpu(mdm->alignUnitSize);
Jan Karaed47a7d2011-10-24 16:47:48 +02001435 if (mdm->flags & 0x01)
1436 mdata->s_flags |= MF_DUPLICATE_MD;
Jan Karabfb257a2008-04-08 20:37:21 +02001437
1438 udf_debug("Metadata Ident suffix=0x%x\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001439 le16_to_cpu(*(__le16 *)
1440 mdm->partIdent.identSuffix));
Steve Magnanifcbf7632017-10-12 08:48:41 -05001441 udf_debug("Metadata part num=%u\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001442 le16_to_cpu(mdm->partitionNum));
Steve Magnanifcbf7632017-10-12 08:48:41 -05001443 udf_debug("Metadata part alloc unit size=%u\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001444 le32_to_cpu(mdm->allocUnitSize));
Steve Magnanifcbf7632017-10-12 08:48:41 -05001445 udf_debug("Metadata file loc=%u\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001446 le32_to_cpu(mdm->metadataFileLoc));
Steve Magnanifcbf7632017-10-12 08:48:41 -05001447 udf_debug("Mirror file loc=%u\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001448 le32_to_cpu(mdm->metadataMirrorFileLoc));
Steve Magnanifcbf7632017-10-12 08:48:41 -05001449 udf_debug("Bitmap file loc=%u\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001450 le32_to_cpu(mdm->metadataBitmapFileLoc));
Steve Magnanifcbf7632017-10-12 08:48:41 -05001451 udf_debug("Flags: %d %u\n",
Jan Karaed47a7d2011-10-24 16:47:48 +02001452 mdata->s_flags, mdm->flags);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001453 } else {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001454 udf_debug("Unknown ident: %s\n",
1455 upm2->partIdent.ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456 continue;
1457 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001458 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1459 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460 }
Steve Magnanifcbf7632017-10-12 08:48:41 -05001461 udf_debug("Partition (%d:%u) type %u on volume %u\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001462 i, map->s_partition_num, type, map->s_volumeseqnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463 }
1464
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001465 if (fileset) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001466 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467
1468 *fileset = lelb_to_cpu(la->extLocation);
Steve Magnanifcbf7632017-10-12 08:48:41 -05001469 udf_debug("FileSet found in LogicalVolDesc at block=%u, partition=%u\n",
Joe Perchesa983f362011-10-10 01:08:07 -07001470 fileset->logicalBlockNum,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001471 fileset->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001472 }
1473 if (lvd->integritySeqExt.extLength)
1474 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
Jan Karad759bfa42013-07-25 19:10:59 +02001475 ret = 0;
Steve Magnani4f5edd82019-02-11 08:24:38 -06001476
1477 if (!sbi->s_lvid_bh) {
1478 /* We can't generate unique IDs without a valid LVID */
1479 if (sb_rdonly(sb)) {
1480 UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
1481 } else {
1482 udf_warn(sb, "Damaged or missing LVID, forcing "
1483 "readonly mount\n");
1484 ret = -EACCES;
1485 }
1486 }
Jan Karac0eb31e2008-04-01 16:50:35 +02001487out_bh:
1488 brelse(bh);
1489 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490}
1491
1492/*
Alden Tondettara47241c2016-04-25 19:27:56 -07001493 * Find the prevailing Logical Volume Integrity Descriptor.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494 */
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001495static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496{
Alden Tondettara47241c2016-04-25 19:27:56 -07001497 struct buffer_head *bh, *final_bh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498 uint16_t ident;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001499 struct udf_sb_info *sbi = UDF_SB(sb);
1500 struct logicalVolIntegrityDesc *lvid;
Alden Tondettara47241c2016-04-25 19:27:56 -07001501 int indirections = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502
Alden Tondettara47241c2016-04-25 19:27:56 -07001503 while (++indirections <= UDF_MAX_LVID_NESTING) {
1504 final_bh = NULL;
1505 while (loc.extLength > 0 &&
1506 (bh = udf_read_tagged(sb, loc.extLocation,
1507 loc.extLocation, &ident))) {
1508 if (ident != TAG_IDENT_LVID) {
1509 brelse(bh);
1510 break;
1511 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001512
Alden Tondettara47241c2016-04-25 19:27:56 -07001513 brelse(final_bh);
1514 final_bh = bh;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001515
Alden Tondettara47241c2016-04-25 19:27:56 -07001516 loc.extLength -= sb->s_blocksize;
1517 loc.extLocation++;
1518 }
1519
1520 if (!final_bh)
1521 return;
1522
1523 brelse(sbi->s_lvid_bh);
1524 sbi->s_lvid_bh = final_bh;
1525
1526 lvid = (struct logicalVolIntegrityDesc *)final_bh->b_data;
1527 if (lvid->nextIntegrityExt.extLength == 0)
1528 return;
1529
1530 loc = leea_to_cpu(lvid->nextIntegrityExt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531 }
Alden Tondettara47241c2016-04-25 19:27:56 -07001532
1533 udf_warn(sb, "Too many LVID indirections (max %u), ignoring.\n",
1534 UDF_MAX_LVID_NESTING);
1535 brelse(sbi->s_lvid_bh);
1536 sbi->s_lvid_bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537}
1538
Jan Kara7b78fd02018-02-09 15:56:34 +01001539/*
1540 * Step for reallocation of table of partition descriptor sequence numbers.
1541 * Must be power of 2.
1542 */
1543#define PART_DESC_ALLOC_STEP 32
1544
Jan Karaee4af502018-08-21 14:52:34 +02001545struct part_desc_seq_scan_data {
1546 struct udf_vds_record rec;
1547 u32 partnum;
1548};
1549
Jan Kara7b78fd02018-02-09 15:56:34 +01001550struct desc_seq_scan_data {
1551 struct udf_vds_record vds[VDS_POS_LENGTH];
1552 unsigned int size_part_descs;
Jan Karaee4af502018-08-21 14:52:34 +02001553 unsigned int num_part_descs;
1554 struct part_desc_seq_scan_data *part_descs_loc;
Jan Kara7b78fd02018-02-09 15:56:34 +01001555};
1556
1557static struct udf_vds_record *handle_partition_descriptor(
1558 struct buffer_head *bh,
1559 struct desc_seq_scan_data *data)
1560{
1561 struct partitionDesc *desc = (struct partitionDesc *)bh->b_data;
1562 int partnum;
Jan Karaee4af502018-08-21 14:52:34 +02001563 int i;
Jan Kara7b78fd02018-02-09 15:56:34 +01001564
1565 partnum = le16_to_cpu(desc->partitionNumber);
Jan Karaee4af502018-08-21 14:52:34 +02001566 for (i = 0; i < data->num_part_descs; i++)
1567 if (partnum == data->part_descs_loc[i].partnum)
1568 return &(data->part_descs_loc[i].rec);
1569 if (data->num_part_descs >= data->size_part_descs) {
1570 struct part_desc_seq_scan_data *new_loc;
Jan Kara7b78fd02018-02-09 15:56:34 +01001571 unsigned int new_size = ALIGN(partnum, PART_DESC_ALLOC_STEP);
1572
Kees Cook6396bb22018-06-12 14:03:40 -07001573 new_loc = kcalloc(new_size, sizeof(*new_loc), GFP_KERNEL);
Jan Kara7b78fd02018-02-09 15:56:34 +01001574 if (!new_loc)
1575 return ERR_PTR(-ENOMEM);
1576 memcpy(new_loc, data->part_descs_loc,
1577 data->size_part_descs * sizeof(*new_loc));
1578 kfree(data->part_descs_loc);
1579 data->part_descs_loc = new_loc;
1580 data->size_part_descs = new_size;
1581 }
Jan Karaee4af502018-08-21 14:52:34 +02001582 return &(data->part_descs_loc[data->num_part_descs++].rec);
Jan Kara7b78fd02018-02-09 15:56:34 +01001583}
1584
1585
1586static struct udf_vds_record *get_volume_descriptor_record(uint16_t ident,
1587 struct buffer_head *bh, struct desc_seq_scan_data *data)
Jan Kara18cf47812018-02-09 15:15:39 +01001588{
1589 switch (ident) {
1590 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
Jan Kara7b78fd02018-02-09 15:56:34 +01001591 return &(data->vds[VDS_POS_PRIMARY_VOL_DESC]);
Jan Kara18cf47812018-02-09 15:15:39 +01001592 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
Jan Kara7b78fd02018-02-09 15:56:34 +01001593 return &(data->vds[VDS_POS_IMP_USE_VOL_DESC]);
Jan Kara18cf47812018-02-09 15:15:39 +01001594 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
Jan Kara7b78fd02018-02-09 15:56:34 +01001595 return &(data->vds[VDS_POS_LOGICAL_VOL_DESC]);
Jan Kara18cf47812018-02-09 15:15:39 +01001596 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
Jan Kara7b78fd02018-02-09 15:56:34 +01001597 return &(data->vds[VDS_POS_UNALLOC_SPACE_DESC]);
1598 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1599 return handle_partition_descriptor(bh, data);
Jan Kara18cf47812018-02-09 15:15:39 +01001600 }
1601 return NULL;
1602}
Vegard Nossume7a4eb82015-12-10 17:13:41 +01001603
1604/*
Jan Karad759bfa42013-07-25 19:10:59 +02001605 * Process a main/reserve volume descriptor sequence.
1606 * @block First block of first extent of the sequence.
1607 * @lastblock Lastblock of first extent of the sequence.
1608 * @fileset There we store extent containing root fileset
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609 *
Jan Karad759bfa42013-07-25 19:10:59 +02001610 * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
1611 * sequence
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612 */
Jan Karad759bfa42013-07-25 19:10:59 +02001613static noinline int udf_process_sequence(
1614 struct super_block *sb,
1615 sector_t block, sector_t lastblock,
1616 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617{
1618 struct buffer_head *bh = NULL;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001619 struct udf_vds_record *curr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001620 struct generic_desc *gd;
1621 struct volDescPtr *vdp;
Fabian Frederick2b8f9422015-02-04 18:15:04 +01001622 bool done = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623 uint32_t vdsn;
1624 uint16_t ident;
Jan Karad759bfa42013-07-25 19:10:59 +02001625 int ret;
Vegard Nossume7a4eb82015-12-10 17:13:41 +01001626 unsigned int indirections = 0;
Jan Kara7b78fd02018-02-09 15:56:34 +01001627 struct desc_seq_scan_data data;
1628 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629
Jan Kara7b78fd02018-02-09 15:56:34 +01001630 memset(data.vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1631 data.size_part_descs = PART_DESC_ALLOC_STEP;
Jan Karaee4af502018-08-21 14:52:34 +02001632 data.num_part_descs = 0;
Kees Cook6396bb22018-06-12 14:03:40 -07001633 data.part_descs_loc = kcalloc(data.size_part_descs,
1634 sizeof(*data.part_descs_loc),
1635 GFP_KERNEL);
Jan Kara7b78fd02018-02-09 15:56:34 +01001636 if (!data.part_descs_loc)
1637 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001638
Jan Karac0eb31e2008-04-01 16:50:35 +02001639 /*
1640 * Read the main descriptor sequence and find which descriptors
1641 * are in it.
1642 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001643 for (; (!done && block <= lastblock); block++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644 bh = udf_read_tagged(sb, block, block, &ident);
Jan Kara67621672018-02-08 18:10:54 +01001645 if (!bh)
1646 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647
1648 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1649 gd = (struct generic_desc *)bh->b_data;
1650 vdsn = le32_to_cpu(gd->volDescSeqNum);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001651 switch (ident) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001652 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
Jan Kara7b568cb2018-02-09 13:28:41 +01001653 if (++indirections > UDF_MAX_TD_NESTING) {
1654 udf_err(sb, "too many Volume Descriptor "
1655 "Pointers (max %u supported)\n",
1656 UDF_MAX_TD_NESTING);
1657 brelse(bh);
1658 return -EIO;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001659 }
Jan Kara7b568cb2018-02-09 13:28:41 +01001660
1661 vdp = (struct volDescPtr *)bh->b_data;
1662 block = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation);
1663 lastblock = le32_to_cpu(
1664 vdp->nextVolDescSeqExt.extLength) >>
1665 sb->s_blocksize_bits;
1666 lastblock += block - 1;
1667 /* For loop is going to increment 'block' again */
1668 block--;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001669 break;
Jan Kara18cf47812018-02-09 15:15:39 +01001670 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001671 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
Jan Kara18cf47812018-02-09 15:15:39 +01001672 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1673 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
Jan Kara7b78fd02018-02-09 15:56:34 +01001674 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1675 curr = get_volume_descriptor_record(ident, bh, &data);
1676 if (IS_ERR(curr)) {
1677 brelse(bh);
1678 return PTR_ERR(curr);
1679 }
1680 /* Descriptor we don't care about? */
1681 if (!curr)
1682 break;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001683 if (vdsn >= curr->volDescSeqNum) {
1684 curr->volDescSeqNum = vdsn;
1685 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001686 }
1687 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001688 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
Jan Kara7b568cb2018-02-09 13:28:41 +01001689 done = true;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001690 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001691 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07001692 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693 }
Jan Karac0eb31e2008-04-01 16:50:35 +02001694 /*
1695 * Now read interesting descriptors again and process them
1696 * in a suitable order
1697 */
Jan Kara7b78fd02018-02-09 15:56:34 +01001698 if (!data.vds[VDS_POS_PRIMARY_VOL_DESC].block) {
Joe Perches78ace70c2011-10-10 01:08:05 -07001699 udf_err(sb, "Primary Volume Descriptor not found!\n");
Jan Karad759bfa42013-07-25 19:10:59 +02001700 return -EAGAIN;
Jan Karac0eb31e2008-04-01 16:50:35 +02001701 }
Jan Kara7b78fd02018-02-09 15:56:34 +01001702 ret = udf_load_pvoldesc(sb, data.vds[VDS_POS_PRIMARY_VOL_DESC].block);
Jan Karad759bfa42013-07-25 19:10:59 +02001703 if (ret < 0)
1704 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001705
Jan Kara7b78fd02018-02-09 15:56:34 +01001706 if (data.vds[VDS_POS_LOGICAL_VOL_DESC].block) {
Jan Karad759bfa42013-07-25 19:10:59 +02001707 ret = udf_load_logicalvol(sb,
Jan Kara7b78fd02018-02-09 15:56:34 +01001708 data.vds[VDS_POS_LOGICAL_VOL_DESC].block,
1709 fileset);
Jan Karad759bfa42013-07-25 19:10:59 +02001710 if (ret < 0)
1711 return ret;
1712 }
Marcin Slusarz165923f2008-02-10 11:33:08 +01001713
Jan Kara7b78fd02018-02-09 15:56:34 +01001714 /* Now handle prevailing Partition Descriptors */
Jan Karaee4af502018-08-21 14:52:34 +02001715 for (i = 0; i < data.num_part_descs; i++) {
1716 ret = udf_load_partdesc(sb, data.part_descs_loc[i].rec.block);
1717 if (ret < 0)
1718 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001719 }
1720
1721 return 0;
1722}
1723
Jan Karad759bfa42013-07-25 19:10:59 +02001724/*
1725 * Load Volume Descriptor Sequence described by anchor in bh
1726 *
1727 * Returns <0 on error, 0 on success
1728 */
Jan Kara403460052009-03-19 16:21:38 +01001729static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1730 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731{
Jan Kara403460052009-03-19 16:21:38 +01001732 struct anchorVolDescPtr *anchor;
Jan Karad759bfa42013-07-25 19:10:59 +02001733 sector_t main_s, main_e, reserve_s, reserve_e;
1734 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735
Jan Kara403460052009-03-19 16:21:38 +01001736 anchor = (struct anchorVolDescPtr *)bh->b_data;
1737
1738 /* Locate the main sequence */
1739 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1740 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1741 main_e = main_e >> sb->s_blocksize_bits;
Jan Kara91c9c9e2018-02-08 17:39:01 +01001742 main_e += main_s - 1;
Jan Kara403460052009-03-19 16:21:38 +01001743
1744 /* Locate the reserve sequence */
1745 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1746 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1747 reserve_e = reserve_e >> sb->s_blocksize_bits;
Jan Kara91c9c9e2018-02-08 17:39:01 +01001748 reserve_e += reserve_s - 1;
Jan Kara403460052009-03-19 16:21:38 +01001749
1750 /* Process the main & reserve sequences */
1751 /* responsible for finding the PartitionDesc(s) */
Jan Karad759bfa42013-07-25 19:10:59 +02001752 ret = udf_process_sequence(sb, main_s, main_e, fileset);
1753 if (ret != -EAGAIN)
1754 return ret;
Jan Karabff943a2012-06-27 22:27:05 +02001755 udf_sb_free_partitions(sb);
Jan Karad759bfa42013-07-25 19:10:59 +02001756 ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
1757 if (ret < 0) {
1758 udf_sb_free_partitions(sb);
1759 /* No sequence was OK, return -EIO */
1760 if (ret == -EAGAIN)
1761 ret = -EIO;
1762 }
1763 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764}
1765
Jan Kara403460052009-03-19 16:21:38 +01001766/*
1767 * Check whether there is an anchor block in the given block and
1768 * load Volume Descriptor Sequence if so.
Jan Karad759bfa42013-07-25 19:10:59 +02001769 *
1770 * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
1771 * block
Jan Kara403460052009-03-19 16:21:38 +01001772 */
1773static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1774 struct kernel_lb_addr *fileset)
1775{
1776 struct buffer_head *bh;
1777 uint16_t ident;
1778 int ret;
1779
1780 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1781 udf_fixed_to_variable(block) >=
Fabian Frederick23bcda12017-01-06 21:54:41 +01001782 i_size_read(sb->s_bdev->bd_inode) >> sb->s_blocksize_bits)
Jan Karad759bfa42013-07-25 19:10:59 +02001783 return -EAGAIN;
Jan Kara403460052009-03-19 16:21:38 +01001784
1785 bh = udf_read_tagged(sb, block, block, &ident);
1786 if (!bh)
Jan Karad759bfa42013-07-25 19:10:59 +02001787 return -EAGAIN;
Jan Kara403460052009-03-19 16:21:38 +01001788 if (ident != TAG_IDENT_AVDP) {
1789 brelse(bh);
Jan Karad759bfa42013-07-25 19:10:59 +02001790 return -EAGAIN;
Jan Kara403460052009-03-19 16:21:38 +01001791 }
1792 ret = udf_load_sequence(sb, bh, fileset);
1793 brelse(bh);
1794 return ret;
1795}
1796
Jan Karad759bfa42013-07-25 19:10:59 +02001797/*
1798 * Search for an anchor volume descriptor pointer.
1799 *
1800 * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
1801 * of anchors.
1802 */
1803static int udf_scan_anchors(struct super_block *sb, sector_t *lastblock,
1804 struct kernel_lb_addr *fileset)
Jan Kara403460052009-03-19 16:21:38 +01001805{
1806 sector_t last[6];
1807 int i;
1808 struct udf_sb_info *sbi = UDF_SB(sb);
1809 int last_count = 0;
Jan Karad759bfa42013-07-25 19:10:59 +02001810 int ret;
Jan Kara403460052009-03-19 16:21:38 +01001811
1812 /* First try user provided anchor */
1813 if (sbi->s_anchor) {
Jan Karad759bfa42013-07-25 19:10:59 +02001814 ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
1815 if (ret != -EAGAIN)
1816 return ret;
Jan Kara403460052009-03-19 16:21:38 +01001817 }
1818 /*
1819 * according to spec, anchor is in either:
1820 * block 256
1821 * lastblock-256
1822 * lastblock
1823 * however, if the disc isn't closed, it could be 512.
1824 */
Jan Karad759bfa42013-07-25 19:10:59 +02001825 ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
1826 if (ret != -EAGAIN)
1827 return ret;
Jan Kara403460052009-03-19 16:21:38 +01001828 /*
1829 * The trouble is which block is the last one. Drives often misreport
1830 * this so we try various possibilities.
1831 */
Jan Karad759bfa42013-07-25 19:10:59 +02001832 last[last_count++] = *lastblock;
1833 if (*lastblock >= 1)
1834 last[last_count++] = *lastblock - 1;
1835 last[last_count++] = *lastblock + 1;
1836 if (*lastblock >= 2)
1837 last[last_count++] = *lastblock - 2;
1838 if (*lastblock >= 150)
1839 last[last_count++] = *lastblock - 150;
1840 if (*lastblock >= 152)
1841 last[last_count++] = *lastblock - 152;
Jan Kara403460052009-03-19 16:21:38 +01001842
1843 for (i = 0; i < last_count; i++) {
Fabian Frederick23bcda12017-01-06 21:54:41 +01001844 if (last[i] >= i_size_read(sb->s_bdev->bd_inode) >>
Jan Kara403460052009-03-19 16:21:38 +01001845 sb->s_blocksize_bits)
1846 continue;
Jan Karad759bfa42013-07-25 19:10:59 +02001847 ret = udf_check_anchor_block(sb, last[i], fileset);
1848 if (ret != -EAGAIN) {
1849 if (!ret)
1850 *lastblock = last[i];
1851 return ret;
1852 }
Jan Kara403460052009-03-19 16:21:38 +01001853 if (last[i] < 256)
1854 continue;
Jan Karad759bfa42013-07-25 19:10:59 +02001855 ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
1856 if (ret != -EAGAIN) {
1857 if (!ret)
1858 *lastblock = last[i];
1859 return ret;
1860 }
Jan Kara403460052009-03-19 16:21:38 +01001861 }
1862
1863 /* Finally try block 512 in case media is open */
Jan Karad759bfa42013-07-25 19:10:59 +02001864 return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
Jan Kara403460052009-03-19 16:21:38 +01001865}
1866
1867/*
1868 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1869 * area specified by it. The function expects sbi->s_lastblock to be the last
1870 * block on the media.
1871 *
Jan Karad759bfa42013-07-25 19:10:59 +02001872 * Return <0 on error, 0 if anchor found. -EAGAIN is special meaning anchor
1873 * was not found.
Jan Kara403460052009-03-19 16:21:38 +01001874 */
1875static int udf_find_anchor(struct super_block *sb,
1876 struct kernel_lb_addr *fileset)
1877{
Jan Kara403460052009-03-19 16:21:38 +01001878 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Karad759bfa42013-07-25 19:10:59 +02001879 sector_t lastblock = sbi->s_last_block;
1880 int ret;
Jan Kara403460052009-03-19 16:21:38 +01001881
Jan Karad759bfa42013-07-25 19:10:59 +02001882 ret = udf_scan_anchors(sb, &lastblock, fileset);
1883 if (ret != -EAGAIN)
Jan Kara403460052009-03-19 16:21:38 +01001884 goto out;
1885
1886 /* No anchor found? Try VARCONV conversion of block numbers */
1887 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
Jan Karad759bfa42013-07-25 19:10:59 +02001888 lastblock = udf_variable_to_fixed(sbi->s_last_block);
Jan Kara403460052009-03-19 16:21:38 +01001889 /* Firstly, we try to not convert number of the last block */
Jan Karad759bfa42013-07-25 19:10:59 +02001890 ret = udf_scan_anchors(sb, &lastblock, fileset);
1891 if (ret != -EAGAIN)
Jan Kara403460052009-03-19 16:21:38 +01001892 goto out;
1893
Jan Karad759bfa42013-07-25 19:10:59 +02001894 lastblock = sbi->s_last_block;
Jan Kara403460052009-03-19 16:21:38 +01001895 /* Secondly, we try with converted number of the last block */
Jan Karad759bfa42013-07-25 19:10:59 +02001896 ret = udf_scan_anchors(sb, &lastblock, fileset);
1897 if (ret < 0) {
Jan Kara403460052009-03-19 16:21:38 +01001898 /* VARCONV didn't help. Clear it. */
1899 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
Jan Kara403460052009-03-19 16:21:38 +01001900 }
1901out:
Jan Karad759bfa42013-07-25 19:10:59 +02001902 if (ret == 0)
1903 sbi->s_last_block = lastblock;
1904 return ret;
Jan Kara403460052009-03-19 16:21:38 +01001905}
1906
1907/*
1908 * Check Volume Structure Descriptor, find Anchor block and load Volume
Jan Karad759bfa42013-07-25 19:10:59 +02001909 * Descriptor Sequence.
1910 *
1911 * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
1912 * block was not found.
Jan Kara403460052009-03-19 16:21:38 +01001913 */
1914static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1915 int silent, struct kernel_lb_addr *fileset)
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001916{
1917 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Kara403460052009-03-19 16:21:38 +01001918 loff_t nsr_off;
Jan Karad759bfa42013-07-25 19:10:59 +02001919 int ret;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001920
1921 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1922 if (!silent)
Joe Perches78ace70c2011-10-10 01:08:05 -07001923 udf_warn(sb, "Bad block size\n");
Jan Karad759bfa42013-07-25 19:10:59 +02001924 return -EINVAL;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001925 }
1926 sbi->s_last_block = uopt->lastblock;
Jan Kara403460052009-03-19 16:21:38 +01001927 if (!uopt->novrs) {
1928 /* Check that it is NSR02 compliant */
1929 nsr_off = udf_check_vsd(sb);
1930 if (!nsr_off) {
1931 if (!silent)
Joe Perches78ace70c2011-10-10 01:08:05 -07001932 udf_warn(sb, "No VRS found\n");
Fabian Frederick70f16ce2017-01-18 19:39:35 +01001933 return -EINVAL;
Jan Kara403460052009-03-19 16:21:38 +01001934 }
1935 if (nsr_off == -1)
Peter A. Felvegi44499602013-10-18 20:07:44 +02001936 udf_debug("Failed to read sector at offset %d. "
1937 "Assuming open disc. Skipping validity "
1938 "check\n", VSD_FIRST_SECTOR_OFFSET);
Jan Kara403460052009-03-19 16:21:38 +01001939 if (!sbi->s_last_block)
1940 sbi->s_last_block = udf_get_last_block(sb);
1941 } else {
1942 udf_debug("Validity check skipped because of novrs option\n");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001943 }
Jan Kara403460052009-03-19 16:21:38 +01001944
1945 /* Look for anchor block and load Volume Descriptor Sequence */
1946 sbi->s_anchor = uopt->anchor;
Jan Karad759bfa42013-07-25 19:10:59 +02001947 ret = udf_find_anchor(sb, fileset);
1948 if (ret < 0) {
1949 if (!silent && ret == -EAGAIN)
Joe Perches78ace70c2011-10-10 01:08:05 -07001950 udf_warn(sb, "No anchor found\n");
Jan Karad759bfa42013-07-25 19:10:59 +02001951 return ret;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001952 }
Jan Karad759bfa42013-07-25 19:10:59 +02001953 return 0;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001954}
1955
Steve Magnaniebbd5e92019-02-08 11:34:54 -06001956static void udf_finalize_lvid(struct logicalVolIntegrityDesc *lvid)
1957{
1958 struct timespec64 ts;
1959
1960 ktime_get_real_ts64(&ts);
1961 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
1962 lvid->descTag.descCRC = cpu_to_le16(
1963 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
1964 le16_to_cpu(lvid->descTag.descCRCLength)));
1965 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1966}
1967
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968static void udf_open_lvid(struct super_block *sb)
1969{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001970 struct udf_sb_info *sbi = UDF_SB(sb);
1971 struct buffer_head *bh = sbi->s_lvid_bh;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001972 struct logicalVolIntegrityDesc *lvid;
1973 struct logicalVolIntegrityDescImpUse *lvidiu;
Jan Kara146bca72009-03-16 18:27:37 +01001974
Marcin Slusarz165923f2008-02-10 11:33:08 +01001975 if (!bh)
1976 return;
Jan Kara69d75672013-09-12 22:00:15 +02001977 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1978 lvidiu = udf_sb_lvidiu(sb);
1979 if (!lvidiu)
1980 return;
Jan Kara949f4a72010-10-20 18:49:20 +02001981
1982 mutex_lock(&sbi->s_alloc_mutex);
Marcin Slusarz165923f2008-02-10 11:33:08 +01001983 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1984 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
Jan Karab72e6322018-02-27 18:55:31 +01001985 if (le32_to_cpu(lvid->integrityType) == LVID_INTEGRITY_TYPE_CLOSE)
1986 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
1987 else
1988 UDF_SET_FLAG(sb, UDF_FLAG_INCONSISTENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001989
Steve Magnaniebbd5e92019-02-08 11:34:54 -06001990 udf_finalize_lvid(lvid);
Marcin Slusarz165923f2008-02-10 11:33:08 +01001991 mark_buffer_dirty(bh);
Jan Kara146bca72009-03-16 18:27:37 +01001992 sbi->s_lvid_dirty = 0;
Jan Kara949f4a72010-10-20 18:49:20 +02001993 mutex_unlock(&sbi->s_alloc_mutex);
Jan Kara9734c9712013-01-17 22:11:38 +01001994 /* Make opening of filesystem visible on the media immediately */
1995 sync_dirty_buffer(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996}
1997
1998static void udf_close_lvid(struct super_block *sb)
1999{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002000 struct udf_sb_info *sbi = UDF_SB(sb);
2001 struct buffer_head *bh = sbi->s_lvid_bh;
2002 struct logicalVolIntegrityDesc *lvid;
Marcin Slusarz165923f2008-02-10 11:33:08 +01002003 struct logicalVolIntegrityDescImpUse *lvidiu;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002004
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002005 if (!bh)
2006 return;
Jan Kara69d75672013-09-12 22:00:15 +02002007 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2008 lvidiu = udf_sb_lvidiu(sb);
2009 if (!lvidiu)
2010 return;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002011
Jan Kara949f4a72010-10-20 18:49:20 +02002012 mutex_lock(&sbi->s_alloc_mutex);
Marcin Slusarz165923f2008-02-10 11:33:08 +01002013 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
2014 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
Marcin Slusarz165923f2008-02-10 11:33:08 +01002015 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
2016 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
2017 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
2018 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
2019 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
2020 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
Jan Karab72e6322018-02-27 18:55:31 +01002021 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_INCONSISTENT))
2022 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023
Jan Kara853a0c22011-12-23 11:53:07 +01002024 /*
2025 * We set buffer uptodate unconditionally here to avoid spurious
2026 * warnings from mark_buffer_dirty() when previous EIO has marked
2027 * the buffer as !uptodate
2028 */
2029 set_buffer_uptodate(bh);
Steve Magnaniebbd5e92019-02-08 11:34:54 -06002030 udf_finalize_lvid(lvid);
Marcin Slusarz165923f2008-02-10 11:33:08 +01002031 mark_buffer_dirty(bh);
Jan Kara146bca72009-03-16 18:27:37 +01002032 sbi->s_lvid_dirty = 0;
Jan Kara949f4a72010-10-20 18:49:20 +02002033 mutex_unlock(&sbi->s_alloc_mutex);
Jan Kara9734c9712013-01-17 22:11:38 +01002034 /* Make closing of filesystem visible on the media immediately */
2035 sync_dirty_buffer(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036}
2037
Jan Karad664b6a2010-10-20 18:28:46 +02002038u64 lvid_get_unique_id(struct super_block *sb)
2039{
2040 struct buffer_head *bh;
2041 struct udf_sb_info *sbi = UDF_SB(sb);
2042 struct logicalVolIntegrityDesc *lvid;
2043 struct logicalVolHeaderDesc *lvhd;
2044 u64 uniqueID;
2045 u64 ret;
2046
2047 bh = sbi->s_lvid_bh;
2048 if (!bh)
2049 return 0;
2050
2051 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2052 lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse;
2053
2054 mutex_lock(&sbi->s_alloc_mutex);
2055 ret = uniqueID = le64_to_cpu(lvhd->uniqueID);
2056 if (!(++uniqueID & 0xFFFFFFFF))
2057 uniqueID += 16;
2058 lvhd->uniqueID = cpu_to_le64(uniqueID);
Steve Magnanie8b42742019-02-08 11:34:55 -06002059 udf_updated_lvid(sb);
Jan Karad664b6a2010-10-20 18:28:46 +02002060 mutex_unlock(&sbi->s_alloc_mutex);
Jan Karad664b6a2010-10-20 18:28:46 +02002061
2062 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002063}
2064
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065static int udf_fill_super(struct super_block *sb, void *options, int silent)
2066{
Jan Karad759bfa42013-07-25 19:10:59 +02002067 int ret = -EINVAL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002068 struct inode *inode = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069 struct udf_options uopt;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002070 struct kernel_lb_addr rootdir, fileset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002071 struct udf_sb_info *sbi;
Jan Kara9181f8b2015-08-20 14:50:07 +02002072 bool lvid_open = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002073
2074 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
Jan Kara116e5252018-02-22 10:39:52 +01002075 /* By default we'll use overflow[ug]id when UDF inode [ug]id == -1 */
2076 uopt.uid = make_kuid(current_user_ns(), overflowuid);
2077 uopt.gid = make_kgid(current_user_ns(), overflowgid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002078 uopt.umask = 0;
Marcin Slusarz87bc7302008-12-02 13:40:11 +01002079 uopt.fmode = UDF_INVALID_MODE;
2080 uopt.dmode = UDF_INVALID_MODE;
Chengguang Xu785dffe2018-02-25 21:25:07 +08002081 uopt.nls_map = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082
Markus Elfring033c9da2017-08-15 16:45:44 +02002083 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
Alessio Igor Bogani9db9f9e2010-11-16 18:40:49 +01002084 if (!sbi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002085 return -ENOMEM;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002086
Linus Torvalds1da177e2005-04-16 15:20:36 -07002087 sb->s_fs_info = sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002088
Ingo Molnar1e7933d2006-03-23 03:00:44 -08002089 mutex_init(&sbi->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090
Miklos Szeredi6da80892008-02-08 04:21:50 -08002091 if (!udf_parse_options((char *)options, &uopt, false))
Markus Elfringfdf26572014-11-18 18:29:10 +01002092 goto parse_options_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093
2094 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002095 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
Joe Perches8076c362011-10-10 01:08:03 -07002096 udf_err(sb, "utf8 cannot be combined with iocharset\n");
Markus Elfringfdf26572014-11-18 18:29:10 +01002097 goto parse_options_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002098 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002099 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100 uopt.nls_map = load_nls_default();
2101 if (!uopt.nls_map)
2102 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
2103 else
2104 udf_debug("Using default NLS map\n");
2105 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
2107 uopt.flags |= (1 << UDF_FLAG_UTF8);
2108
2109 fileset.logicalBlockNum = 0xFFFFFFFF;
2110 fileset.partitionReferenceNum = 0xFFFF;
2111
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002112 sbi->s_flags = uopt.flags;
2113 sbi->s_uid = uopt.uid;
2114 sbi->s_gid = uopt.gid;
2115 sbi->s_umask = uopt.umask;
Marcin Slusarz7ac9bcd52008-11-16 20:52:19 +01002116 sbi->s_fmode = uopt.fmode;
2117 sbi->s_dmode = uopt.dmode;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002118 sbi->s_nls_map = uopt.nls_map;
Jan Karac03cad22010-10-20 22:17:28 +02002119 rwlock_init(&sbi->s_cred_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002121 if (uopt.session == 0xFFFFFFFF)
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002122 sbi->s_session = udf_get_last_session(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123 else
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002124 sbi->s_session = uopt.session;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002125
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002126 udf_debug("Multi-session=%d\n", sbi->s_session);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002127
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128 /* Fill in the rest of the superblock */
2129 sb->s_op = &udf_sb_ops;
Rasmus Rohde221e5832008-04-30 17:22:06 +02002130 sb->s_export_op = &udf_export_ops;
Christoph Hellwig123e9ca2010-05-19 07:16:44 -04002131
Linus Torvalds1da177e2005-04-16 15:20:36 -07002132 sb->s_magic = UDF_SUPER_MAGIC;
2133 sb->s_time_gran = 1000;
2134
Jan Kara403460052009-03-19 16:21:38 +01002135 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
2136 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
2137 } else {
Martin K. Petersene1defc42009-05-22 17:17:49 -04002138 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
Fabian Frederick70f16ce2017-01-18 19:39:35 +01002139 while (uopt.blocksize <= 4096) {
Jan Kara403460052009-03-19 16:21:38 +01002140 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
Fabian Frederick70f16ce2017-01-18 19:39:35 +01002141 if (ret < 0) {
2142 if (!silent && ret != -EACCES) {
Steve Magnanifcbf7632017-10-12 08:48:41 -05002143 pr_notice("Scanning with blocksize %u failed\n",
Fabian Frederick70f16ce2017-01-18 19:39:35 +01002144 uopt.blocksize);
2145 }
2146 brelse(sbi->s_lvid_bh);
2147 sbi->s_lvid_bh = NULL;
2148 /*
2149 * EACCES is special - we want to propagate to
2150 * upper layers that we cannot handle RW mount.
2151 */
2152 if (ret == -EACCES)
2153 break;
2154 } else
2155 break;
2156
2157 uopt.blocksize <<= 1;
Jan Kara403460052009-03-19 16:21:38 +01002158 }
2159 }
Jan Karad759bfa42013-07-25 19:10:59 +02002160 if (ret < 0) {
2161 if (ret == -EAGAIN) {
2162 udf_warn(sb, "No partition found (1)\n");
2163 ret = -EINVAL;
2164 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002165 goto error_out;
2166 }
2167
Steve Magnanifcbf7632017-10-12 08:48:41 -05002168 udf_debug("Lastblock=%u\n", sbi->s_last_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002170 if (sbi->s_lvid_bh) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002171 struct logicalVolIntegrityDescImpUse *lvidiu =
Jan Kara69d75672013-09-12 22:00:15 +02002172 udf_sb_lvidiu(sb);
2173 uint16_t minUDFReadRev;
2174 uint16_t minUDFWriteRev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175
Jan Kara69d75672013-09-12 22:00:15 +02002176 if (!lvidiu) {
2177 ret = -EINVAL;
2178 goto error_out;
2179 }
2180 minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
2181 minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002182 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
Joe Perches78ace70c2011-10-10 01:08:05 -07002183 udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
Jan Kara69d75672013-09-12 22:00:15 +02002184 minUDFReadRev,
Joe Perches78ace70c2011-10-10 01:08:05 -07002185 UDF_MAX_READ_VERSION);
Jan Karad759bfa42013-07-25 19:10:59 +02002186 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187 goto error_out;
Jan Karaa9ad01b2018-09-06 15:56:10 +02002188 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) {
2189 if (!sb_rdonly(sb)) {
2190 ret = -EACCES;
2191 goto error_out;
2192 }
2193 UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
Jan Karae729eac2013-07-25 16:15:16 +02002194 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002195
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002196 sbi->s_udfrev = minUDFWriteRev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002197
2198 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
2199 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
2200 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
2201 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
2202 }
2203
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002204 if (!sbi->s_partitions) {
Joe Perches78ace70c2011-10-10 01:08:05 -07002205 udf_warn(sb, "No partition found (2)\n");
Jan Karad759bfa42013-07-25 19:10:59 +02002206 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002207 goto error_out;
2208 }
2209
Marcin Slusarz4b111112008-02-08 04:20:36 -08002210 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
Jan Karaa9ad01b2018-09-06 15:56:10 +02002211 UDF_PART_FLAG_READ_ONLY) {
2212 if (!sb_rdonly(sb)) {
2213 ret = -EACCES;
2214 goto error_out;
2215 }
2216 UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
Peter Osterlundc1a26e72006-10-05 21:17:50 +02002217 }
Eric Sandeen39b3f6d2006-09-29 01:59:41 -07002218
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002219 if (udf_find_fileset(sb, &fileset, &rootdir)) {
Joe Perches78ace70c2011-10-10 01:08:05 -07002220 udf_warn(sb, "No fileset found\n");
Jan Karad759bfa42013-07-25 19:10:59 +02002221 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002222 goto error_out;
2223 }
2224
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002225 if (!silent) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002226 struct timestamp ts;
Marcin Slusarz56774802008-02-10 11:25:31 +01002227 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
Joe Perches78ace70c2011-10-10 01:08:05 -07002228 udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
2229 sbi->s_volume_ident,
2230 le16_to_cpu(ts.year), ts.month, ts.day,
Marcin Slusarz56774802008-02-10 11:25:31 +01002231 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002232 }
David Howellsbc98a422017-07-17 08:45:34 +01002233 if (!sb_rdonly(sb)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234 udf_open_lvid(sb);
Jan Kara9181f8b2015-08-20 14:50:07 +02002235 lvid_open = true;
2236 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002237
2238 /* Assign the root inode */
2239 /* assign inodes by physical block number */
2240 /* perhaps it's not extensible enough, but for now ... */
Pekka Enberg97e961f2008-10-15 12:29:03 +02002241 inode = udf_iget(sb, &rootdir);
Jan Kara6d3d5e82014-09-04 16:15:51 +02002242 if (IS_ERR(inode)) {
Steve Magnanifcbf7632017-10-12 08:48:41 -05002243 udf_err(sb, "Error in udf_iget, block=%u, partition=%u\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002244 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
Jan Kara6d3d5e82014-09-04 16:15:51 +02002245 ret = PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002246 goto error_out;
2247 }
2248
2249 /* Allocate a dentry for the root inode */
Al Viro48fde702012-01-08 22:15:13 -05002250 sb->s_root = d_make_root(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002251 if (!sb->s_root) {
Joe Perches78ace70c2011-10-10 01:08:05 -07002252 udf_err(sb, "Couldn't allocate root dentry\n");
Jan Karad759bfa42013-07-25 19:10:59 +02002253 ret = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254 goto error_out;
2255 }
Jan Kara31170b62007-05-08 00:35:21 -07002256 sb->s_maxbytes = MAX_LFS_FILESIZE;
Al Viro8de52772012-02-06 12:45:27 -05002257 sb->s_max_links = UDF_MAX_LINKS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002258 return 0;
2259
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002260error_out:
Markus Elfring0d454e42014-11-18 17:17:46 +01002261 iput(sbi->s_vat_inode);
Markus Elfringfdf26572014-11-18 18:29:10 +01002262parse_options_failure:
Chengguang Xu785dffe2018-02-25 21:25:07 +08002263 if (uopt.nls_map)
2264 unload_nls(uopt.nls_map);
Jan Kara9181f8b2015-08-20 14:50:07 +02002265 if (lvid_open)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002266 udf_close_lvid(sb);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002267 brelse(sbi->s_lvid_bh);
Jan Karabff943a2012-06-27 22:27:05 +02002268 udf_sb_free_partitions(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002269 kfree(sbi);
2270 sb->s_fs_info = NULL;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002271
Jan Karad759bfa42013-07-25 19:10:59 +02002272 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273}
2274
Joe Perches8076c362011-10-10 01:08:03 -07002275void _udf_err(struct super_block *sb, const char *function,
2276 const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277{
Joe Perchesc2bff362011-10-10 01:08:06 -07002278 struct va_format vaf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002279 va_list args;
2280
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281 va_start(args, fmt);
Joe Perchesc2bff362011-10-10 01:08:06 -07002282
2283 vaf.fmt = fmt;
2284 vaf.va = &args;
2285
2286 pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf);
2287
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288 va_end(args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002289}
2290
Joe Perchesa40ecd72011-10-10 01:08:04 -07002291void _udf_warn(struct super_block *sb, const char *function,
2292 const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002293{
Joe Perchesc2bff362011-10-10 01:08:06 -07002294 struct va_format vaf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295 va_list args;
2296
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002297 va_start(args, fmt);
Joe Perchesc2bff362011-10-10 01:08:06 -07002298
2299 vaf.fmt = fmt;
2300 vaf.va = &args;
2301
2302 pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf);
2303
Linus Torvalds1da177e2005-04-16 15:20:36 -07002304 va_end(args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002305}
2306
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002307static void udf_put_super(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002308{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002309 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002310
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002311 sbi = UDF_SB(sb);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +02002312
Markus Elfring0d454e42014-11-18 17:17:46 +01002313 iput(sbi->s_vat_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002314 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002315 unload_nls(sbi->s_nls_map);
David Howellsbc98a422017-07-17 08:45:34 +01002316 if (!sb_rdonly(sb))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002317 udf_close_lvid(sb);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002318 brelse(sbi->s_lvid_bh);
Jan Karabff943a2012-06-27 22:27:05 +02002319 udf_sb_free_partitions(sb);
Fabian Frederickbbe48dd2015-01-10 19:13:32 +01002320 mutex_destroy(&sbi->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002321 kfree(sb->s_fs_info);
2322 sb->s_fs_info = NULL;
2323}
2324
Jan Kara146bca72009-03-16 18:27:37 +01002325static int udf_sync_fs(struct super_block *sb, int wait)
2326{
2327 struct udf_sb_info *sbi = UDF_SB(sb);
2328
2329 mutex_lock(&sbi->s_alloc_mutex);
2330 if (sbi->s_lvid_dirty) {
Steve Magnanie8b42742019-02-08 11:34:55 -06002331 struct buffer_head *bh = sbi->s_lvid_bh;
Jan Kara52b96662019-02-19 14:59:43 +01002332 struct logicalVolIntegrityDesc *lvid;
Steve Magnanie8b42742019-02-08 11:34:55 -06002333
Jan Kara52b96662019-02-19 14:59:43 +01002334 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
2335 udf_finalize_lvid(lvid);
Steve Magnanie8b42742019-02-08 11:34:55 -06002336
Jan Kara146bca72009-03-16 18:27:37 +01002337 /*
2338 * Blockdevice will be synced later so we don't have to submit
2339 * the buffer for IO
2340 */
Steve Magnanie8b42742019-02-08 11:34:55 -06002341 mark_buffer_dirty(bh);
Jan Kara146bca72009-03-16 18:27:37 +01002342 sbi->s_lvid_dirty = 0;
2343 }
2344 mutex_unlock(&sbi->s_alloc_mutex);
2345
2346 return 0;
2347}
2348
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002349static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002350{
David Howells726c3342006-06-23 02:02:58 -07002351 struct super_block *sb = dentry->d_sb;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002352 struct udf_sb_info *sbi = UDF_SB(sb);
2353 struct logicalVolIntegrityDescImpUse *lvidiu;
Coly Li557f5a12009-01-20 01:36:55 +08002354 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002355
Jan Kara69d75672013-09-12 22:00:15 +02002356 lvidiu = udf_sb_lvidiu(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002357 buf->f_type = UDF_SUPER_MAGIC;
2358 buf->f_bsize = sb->s_blocksize;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002359 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002360 buf->f_bfree = udf_count_free(sb);
2361 buf->f_bavail = buf->f_bfree;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002362 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2363 le32_to_cpu(lvidiu->numDirs)) : 0)
2364 + buf->f_bfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365 buf->f_ffree = buf->f_bfree;
Andrew Gabbasov9fba7052016-01-15 02:44:21 -06002366 buf->f_namelen = UDF_NAME_LEN;
Coly Li557f5a12009-01-20 01:36:55 +08002367 buf->f_fsid.val[0] = (u32)id;
2368 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369
2370 return 0;
2371}
2372
Marcin Slusarz4b111112008-02-08 04:20:36 -08002373static unsigned int udf_count_free_bitmap(struct super_block *sb,
2374 struct udf_bitmap *bitmap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002375{
2376 struct buffer_head *bh = NULL;
2377 unsigned int accum = 0;
2378 int index;
Steve Magnanib490bdd2017-10-12 08:48:40 -05002379 udf_pblk_t block = 0, newblock;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002380 struct kernel_lb_addr loc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002381 uint32_t bytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002382 uint8_t *ptr;
2383 uint16_t ident;
2384 struct spaceBitmapDesc *bm;
2385
Linus Torvalds1da177e2005-04-16 15:20:36 -07002386 loc.logicalBlockNum = bitmap->s_extPosition;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002387 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
Pekka Enberg97e961f2008-10-15 12:29:03 +02002388 bh = udf_read_ptagged(sb, &loc, 0, &ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002389
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002390 if (!bh) {
Joe Perches78ace70c2011-10-10 01:08:05 -07002391 udf_err(sb, "udf_count_free failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002392 goto out;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002393 } else if (ident != TAG_IDENT_SBD) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002394 brelse(bh);
Joe Perches78ace70c2011-10-10 01:08:05 -07002395 udf_err(sb, "udf_count_free failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002396 goto out;
2397 }
2398
2399 bm = (struct spaceBitmapDesc *)bh->b_data;
2400 bytes = le32_to_cpu(bm->numOfBytes);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002401 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2402 ptr = (uint8_t *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002403
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002404 while (bytes > 0) {
Marcin Slusarz01b954a2008-02-02 22:37:07 +01002405 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2406 accum += bitmap_weight((const unsigned long *)(ptr + index),
2407 cur_bytes * 8);
2408 bytes -= cur_bytes;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002409 if (bytes) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002410 brelse(bh);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002411 newblock = udf_get_lb_pblock(sb, &loc, ++block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002412 bh = udf_tread(sb, newblock);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002413 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002414 udf_debug("read failed\n");
2415 goto out;
2416 }
2417 index = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002418 ptr = (uint8_t *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002419 }
2420 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07002421 brelse(bh);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002422out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423 return accum;
2424}
2425
Marcin Slusarz4b111112008-02-08 04:20:36 -08002426static unsigned int udf_count_free_table(struct super_block *sb,
2427 struct inode *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002428{
2429 unsigned int accum = 0;
Jan Karaff116fc2007-05-08 00:35:14 -07002430 uint32_t elen;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002431 struct kernel_lb_addr eloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002432 int8_t etype;
Jan Karaff116fc2007-05-08 00:35:14 -07002433 struct extent_position epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002434
Jan Karad1668fe2010-10-20 23:24:12 +02002435 mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
Marcin Slusarzc0b34432008-02-08 04:20:42 -08002436 epos.block = UDF_I(table)->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -07002437 epos.offset = sizeof(struct unallocSpaceEntry);
2438 epos.bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002439
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002440 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002441 accum += (elen >> table->i_sb->s_blocksize_bits);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002442
Jan Kara3bf25cb2007-05-08 00:35:16 -07002443 brelse(epos.bh);
Jan Karad1668fe2010-10-20 23:24:12 +02002444 mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002445
2446 return accum;
2447}
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002448
2449static unsigned int udf_count_free(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002450{
2451 unsigned int accum = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002452 struct udf_sb_info *sbi;
2453 struct udf_part_map *map;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002454
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002455 sbi = UDF_SB(sb);
2456 if (sbi->s_lvid_bh) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002457 struct logicalVolIntegrityDesc *lvid =
2458 (struct logicalVolIntegrityDesc *)
2459 sbi->s_lvid_bh->b_data;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002460 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002461 accum = le32_to_cpu(
2462 lvid->freeSpaceTable[sbi->s_partition]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002463 if (accum == 0xFFFFFFFF)
2464 accum = 0;
2465 }
2466 }
2467
2468 if (accum)
2469 return accum;
2470
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002471 map = &sbi->s_partmaps[sbi->s_partition];
2472 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002473 accum += udf_count_free_bitmap(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002474 map->s_uspace.s_bitmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002475 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002476 if (accum)
2477 return accum;
2478
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002479 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002480 accum += udf_count_free_table(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002481 map->s_uspace.s_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002482 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002483 return accum;
2484}
Fabian Frederick54bb60d2017-01-06 21:53:57 +01002485
2486MODULE_AUTHOR("Ben Fennema");
2487MODULE_DESCRIPTION("Universal Disk Format Filesystem");
2488MODULE_LICENSE("GPL");
2489module_init(init_udf_fs)
2490module_exit(exit_udf_fs)