Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | * 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 Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 36 | * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced |
| 37 | * vol descs. rewrote option handling based on isofs |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | * 12/20/98 find the free space bitmap (if it exists) |
| 39 | */ |
| 40 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 41 | #include "udfdecl.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <linux/buffer_head.h> |
| 52 | #include <linux/vfs.h> |
| 53 | #include <linux/vmalloc.h> |
Marcin Slusarz | dc5d39b | 2008-02-08 04:20:32 -0800 | [diff] [blame] | 54 | #include <linux/errno.h> |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 55 | #include <linux/mount.h> |
| 56 | #include <linux/seq_file.h> |
Marcin Slusarz | 01b954a | 2008-02-02 22:37:07 +0100 | [diff] [blame] | 57 | #include <linux/bitmap.h> |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 58 | #include <linux/crc-itu-t.h> |
Jan Kara | 1df2ae3 | 2012-06-27 21:23:07 +0200 | [diff] [blame] | 59 | #include <linux/log2.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | #include <asm/byteorder.h> |
| 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #include "udf_sb.h" |
| 63 | #include "udf_i.h" |
| 64 | |
| 65 | #include <linux/init.h> |
| 66 | #include <asm/uaccess.h> |
| 67 | |
| 68 | #define VDS_POS_PRIMARY_VOL_DESC 0 |
| 69 | #define VDS_POS_UNALLOC_SPACE_DESC 1 |
| 70 | #define VDS_POS_LOGICAL_VOL_DESC 2 |
| 71 | #define VDS_POS_PARTITION_DESC 3 |
| 72 | #define VDS_POS_IMP_USE_VOL_DESC 4 |
| 73 | #define VDS_POS_VOL_DESC_PTR 5 |
| 74 | #define VDS_POS_TERMINATING_DESC 6 |
| 75 | #define VDS_POS_LENGTH 7 |
| 76 | |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 77 | #define UDF_DEFAULT_BLOCKSIZE 2048 |
| 78 | |
Al Viro | 8de5277 | 2012-02-06 12:45:27 -0500 | [diff] [blame] | 79 | enum { UDF_MAX_LINKS = 0xffff }; |
| 80 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | /* These are the "meat" - everything else is stuffing */ |
| 82 | static int udf_fill_super(struct super_block *, void *, int); |
| 83 | static void udf_put_super(struct super_block *); |
Jan Kara | 146bca7 | 2009-03-16 18:27:37 +0100 | [diff] [blame] | 84 | static int udf_sync_fs(struct super_block *, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | static int udf_remount_fs(struct super_block *, int *, char *); |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 86 | static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 87 | static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, |
| 88 | struct kernel_lb_addr *); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 89 | static void udf_load_fileset(struct super_block *, struct buffer_head *, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 90 | struct kernel_lb_addr *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | static void udf_open_lvid(struct super_block *); |
| 92 | static void udf_close_lvid(struct super_block *); |
| 93 | static unsigned int udf_count_free(struct super_block *); |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 94 | static int udf_statfs(struct dentry *, struct kstatfs *); |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 95 | static int udf_show_options(struct seq_file *, struct dentry *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 97 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) |
| 98 | { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 99 | struct logicalVolIntegrityDesc *lvid = |
| 100 | (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 101 | __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 102 | __u32 offset = number_of_partitions * 2 * |
| 103 | sizeof(uint32_t)/sizeof(uint8_t); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 104 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
| 105 | } |
| 106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | /* UDF filesystem type */ |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 108 | static struct dentry *udf_mount(struct file_system_type *fs_type, |
| 109 | int flags, const char *dev_name, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | { |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 111 | return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | static struct file_system_type udf_fstype = { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 115 | .owner = THIS_MODULE, |
| 116 | .name = "udf", |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 117 | .mount = udf_mount, |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 118 | .kill_sb = kill_block_super, |
| 119 | .fs_flags = FS_REQUIRES_DEV, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | }; |
| 121 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 122 | static struct kmem_cache *udf_inode_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | |
| 124 | static struct inode *udf_alloc_inode(struct super_block *sb) |
| 125 | { |
| 126 | struct udf_inode_info *ei; |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 127 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | if (!ei) |
| 129 | return NULL; |
Dan Bastone | 95f8797 | 2006-08-13 23:24:18 -0700 | [diff] [blame] | 130 | |
| 131 | ei->i_unique = 0; |
| 132 | ei->i_lenExtents = 0; |
| 133 | ei->i_next_alloc_block = 0; |
| 134 | ei->i_next_alloc_goal = 0; |
| 135 | ei->i_strat4096 = 0; |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 136 | init_rwsem(&ei->i_data_sem); |
Dan Bastone | 95f8797 | 2006-08-13 23:24:18 -0700 | [diff] [blame] | 137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | return &ei->vfs_inode; |
| 139 | } |
| 140 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 141 | static void udf_i_callback(struct rcu_head *head) |
| 142 | { |
| 143 | struct inode *inode = container_of(head, struct inode, i_rcu); |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 144 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); |
| 145 | } |
| 146 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | static void udf_destroy_inode(struct inode *inode) |
| 148 | { |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 149 | call_rcu(&inode->i_rcu, udf_i_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | } |
| 151 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 152 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 154 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 156 | ei->i_ext.i_data = NULL; |
| 157 | inode_init_once(&ei->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | static int init_inodecache(void) |
| 161 | { |
| 162 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", |
| 163 | sizeof(struct udf_inode_info), |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 164 | 0, (SLAB_RECLAIM_ACCOUNT | |
| 165 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 166 | init_once); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 167 | if (!udf_inode_cachep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | return -ENOMEM; |
| 169 | return 0; |
| 170 | } |
| 171 | |
| 172 | static void destroy_inodecache(void) |
| 173 | { |
Kirill A. Shutemov | 8c0a853 | 2012-09-26 11:33:07 +1000 | [diff] [blame^] | 174 | /* |
| 175 | * Make sure all delayed rcu free inodes are flushed before we |
| 176 | * destroy cache. |
| 177 | */ |
| 178 | rcu_barrier(); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 179 | kmem_cache_destroy(udf_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | /* Superblock operations */ |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 183 | static const struct super_operations udf_sb_ops = { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 184 | .alloc_inode = udf_alloc_inode, |
| 185 | .destroy_inode = udf_destroy_inode, |
| 186 | .write_inode = udf_write_inode, |
Al Viro | 3aac2b6 | 2010-06-07 00:43:39 -0400 | [diff] [blame] | 187 | .evict_inode = udf_evict_inode, |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 188 | .put_super = udf_put_super, |
Jan Kara | 146bca7 | 2009-03-16 18:27:37 +0100 | [diff] [blame] | 189 | .sync_fs = udf_sync_fs, |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 190 | .statfs = udf_statfs, |
| 191 | .remount_fs = udf_remount_fs, |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 192 | .show_options = udf_show_options, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | }; |
| 194 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 195 | struct udf_options { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | unsigned char novrs; |
| 197 | unsigned int blocksize; |
| 198 | unsigned int session; |
| 199 | unsigned int lastblock; |
| 200 | unsigned int anchor; |
| 201 | unsigned int volume; |
| 202 | unsigned short partition; |
| 203 | unsigned int fileset; |
| 204 | unsigned int rootdir; |
| 205 | unsigned int flags; |
Al Viro | faa1729 | 2011-07-26 03:18:29 -0400 | [diff] [blame] | 206 | umode_t umask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | gid_t gid; |
| 208 | uid_t uid; |
Al Viro | faa1729 | 2011-07-26 03:18:29 -0400 | [diff] [blame] | 209 | umode_t fmode; |
| 210 | umode_t dmode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | struct nls_table *nls_map; |
| 212 | }; |
| 213 | |
| 214 | static int __init init_udf_fs(void) |
| 215 | { |
| 216 | int err; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 217 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | err = init_inodecache(); |
| 219 | if (err) |
| 220 | goto out1; |
| 221 | err = register_filesystem(&udf_fstype); |
| 222 | if (err) |
| 223 | goto out; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | return 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 226 | |
| 227 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | destroy_inodecache(); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 229 | |
| 230 | out1: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | return err; |
| 232 | } |
| 233 | |
| 234 | static void __exit exit_udf_fs(void) |
| 235 | { |
| 236 | unregister_filesystem(&udf_fstype); |
| 237 | destroy_inodecache(); |
| 238 | } |
| 239 | |
| 240 | module_init(init_udf_fs) |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 241 | module_exit(exit_udf_fs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
Marcin Slusarz | dc5d39b | 2008-02-08 04:20:32 -0800 | [diff] [blame] | 243 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
| 244 | { |
| 245 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 246 | |
| 247 | sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), |
| 248 | GFP_KERNEL); |
| 249 | if (!sbi->s_partmaps) { |
Joe Perches | 8076c36 | 2011-10-10 01:08:03 -0700 | [diff] [blame] | 250 | udf_err(sb, "Unable to allocate space for %d partition maps\n", |
| 251 | count); |
Marcin Slusarz | dc5d39b | 2008-02-08 04:20:32 -0800 | [diff] [blame] | 252 | sbi->s_partitions = 0; |
| 253 | return -ENOMEM; |
| 254 | } |
| 255 | |
| 256 | sbi->s_partitions = count; |
| 257 | return 0; |
| 258 | } |
| 259 | |
Jan Kara | bff943a | 2012-06-27 22:27:05 +0200 | [diff] [blame] | 260 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
| 261 | { |
| 262 | int i; |
| 263 | int nr_groups = bitmap->s_nr_groups; |
| 264 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * |
| 265 | nr_groups); |
| 266 | |
| 267 | for (i = 0; i < nr_groups; i++) |
| 268 | if (bitmap->s_block_bitmap[i]) |
| 269 | brelse(bitmap->s_block_bitmap[i]); |
| 270 | |
| 271 | if (size <= PAGE_SIZE) |
| 272 | kfree(bitmap); |
| 273 | else |
| 274 | vfree(bitmap); |
| 275 | } |
| 276 | |
| 277 | static void udf_free_partition(struct udf_part_map *map) |
| 278 | { |
| 279 | int i; |
| 280 | struct udf_meta_data *mdata; |
| 281 | |
| 282 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) |
| 283 | iput(map->s_uspace.s_table); |
| 284 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) |
| 285 | iput(map->s_fspace.s_table); |
| 286 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) |
| 287 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); |
| 288 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) |
| 289 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); |
| 290 | if (map->s_partition_type == UDF_SPARABLE_MAP15) |
| 291 | for (i = 0; i < 4; i++) |
| 292 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); |
| 293 | else if (map->s_partition_type == UDF_METADATA_MAP25) { |
| 294 | mdata = &map->s_type_specific.s_metadata; |
| 295 | iput(mdata->s_metadata_fe); |
| 296 | mdata->s_metadata_fe = NULL; |
| 297 | |
| 298 | iput(mdata->s_mirror_fe); |
| 299 | mdata->s_mirror_fe = NULL; |
| 300 | |
| 301 | iput(mdata->s_bitmap_fe); |
| 302 | mdata->s_bitmap_fe = NULL; |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | static void udf_sb_free_partitions(struct super_block *sb) |
| 307 | { |
| 308 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 309 | int i; |
| 310 | |
| 311 | for (i = 0; i < sbi->s_partitions; i++) |
| 312 | udf_free_partition(&sbi->s_partmaps[i]); |
| 313 | kfree(sbi->s_partmaps); |
| 314 | sbi->s_partmaps = NULL; |
| 315 | } |
| 316 | |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 317 | static int udf_show_options(struct seq_file *seq, struct dentry *root) |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 318 | { |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 319 | struct super_block *sb = root->d_sb; |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 320 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 321 | |
| 322 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) |
| 323 | seq_puts(seq, ",nostrict"); |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 324 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 325 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); |
| 326 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) |
| 327 | seq_puts(seq, ",unhide"); |
| 328 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) |
| 329 | seq_puts(seq, ",undelete"); |
| 330 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) |
| 331 | seq_puts(seq, ",noadinicb"); |
| 332 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) |
| 333 | seq_puts(seq, ",shortad"); |
| 334 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) |
| 335 | seq_puts(seq, ",uid=forget"); |
| 336 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) |
| 337 | seq_puts(seq, ",uid=ignore"); |
| 338 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) |
| 339 | seq_puts(seq, ",gid=forget"); |
| 340 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) |
| 341 | seq_puts(seq, ",gid=ignore"); |
| 342 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) |
| 343 | seq_printf(seq, ",uid=%u", sbi->s_uid); |
| 344 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) |
| 345 | seq_printf(seq, ",gid=%u", sbi->s_gid); |
| 346 | if (sbi->s_umask != 0) |
Al Viro | faa1729 | 2011-07-26 03:18:29 -0400 | [diff] [blame] | 347 | seq_printf(seq, ",umask=%ho", sbi->s_umask); |
Marcin Slusarz | 87bc730 | 2008-12-02 13:40:11 +0100 | [diff] [blame] | 348 | if (sbi->s_fmode != UDF_INVALID_MODE) |
Al Viro | faa1729 | 2011-07-26 03:18:29 -0400 | [diff] [blame] | 349 | seq_printf(seq, ",mode=%ho", sbi->s_fmode); |
Marcin Slusarz | 87bc730 | 2008-12-02 13:40:11 +0100 | [diff] [blame] | 350 | if (sbi->s_dmode != UDF_INVALID_MODE) |
Al Viro | faa1729 | 2011-07-26 03:18:29 -0400 | [diff] [blame] | 351 | seq_printf(seq, ",dmode=%ho", sbi->s_dmode); |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 352 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) |
| 353 | seq_printf(seq, ",session=%u", sbi->s_session); |
| 354 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) |
| 355 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 356 | if (sbi->s_anchor != 0) |
| 357 | seq_printf(seq, ",anchor=%u", sbi->s_anchor); |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 358 | /* |
| 359 | * volume, partition, fileset and rootdir seem to be ignored |
| 360 | * currently |
| 361 | */ |
| 362 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) |
| 363 | seq_puts(seq, ",utf8"); |
| 364 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) |
| 365 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); |
| 366 | |
| 367 | return 0; |
| 368 | } |
| 369 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | /* |
| 371 | * udf_parse_options |
| 372 | * |
| 373 | * PURPOSE |
| 374 | * Parse mount options. |
| 375 | * |
| 376 | * DESCRIPTION |
| 377 | * The following mount options are supported: |
| 378 | * |
| 379 | * gid= Set the default group. |
| 380 | * umask= Set the default umask. |
Marcin Slusarz | 7ac9bcd5 | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 381 | * mode= Set the default file permissions. |
| 382 | * dmode= Set the default directory permissions. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | * uid= Set the default user. |
| 384 | * bs= Set the block size. |
| 385 | * unhide Show otherwise hidden files. |
| 386 | * undelete Show deleted files in lists. |
| 387 | * adinicb Embed data in the inode (default) |
| 388 | * noadinicb Don't embed data in the inode |
| 389 | * shortad Use short ad's |
| 390 | * longad Use long ad's (default) |
| 391 | * nostrict Unset strict conformance |
| 392 | * iocharset= Set the NLS character set |
| 393 | * |
| 394 | * The remaining are for debugging and disaster recovery: |
| 395 | * |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 396 | * novrs Skip volume sequence recognition |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | * |
| 398 | * The following expect a offset from 0. |
| 399 | * |
| 400 | * session= Set the CDROM session (default= last session) |
| 401 | * anchor= Override standard anchor location. (default= 256) |
| 402 | * volume= Override the VolumeDesc location. (unused) |
| 403 | * partition= Override the PartitionDesc location. (unused) |
| 404 | * lastblock= Set the last block of the filesystem/ |
| 405 | * |
| 406 | * The following expect a offset from the partition root. |
| 407 | * |
| 408 | * fileset= Override the fileset block location. (unused) |
| 409 | * rootdir= Override the root directory location. (unused) |
| 410 | * WARNING: overriding the rootdir to a non-directory may |
| 411 | * yield highly unpredictable results. |
| 412 | * |
| 413 | * PRE-CONDITIONS |
| 414 | * options Pointer to mount options string. |
| 415 | * uopts Pointer to mount options variable. |
| 416 | * |
| 417 | * POST-CONDITIONS |
| 418 | * <return> 1 Mount options parsed okay. |
| 419 | * <return> 0 Error parsing mount options. |
| 420 | * |
| 421 | * HISTORY |
| 422 | * July 1, 1997 - Andrew E. Mileski |
| 423 | * Written, tested, and released. |
| 424 | */ |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 425 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | enum { |
| 427 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, |
| 428 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, |
| 429 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, |
| 430 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, |
| 431 | Opt_rootdir, Opt_utf8, Opt_iocharset, |
Marcin Slusarz | 7ac9bcd5 | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 432 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, |
| 433 | Opt_fmode, Opt_dmode |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | }; |
| 435 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 436 | static const match_table_t tokens = { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 437 | {Opt_novrs, "novrs"}, |
| 438 | {Opt_nostrict, "nostrict"}, |
| 439 | {Opt_bs, "bs=%u"}, |
| 440 | {Opt_unhide, "unhide"}, |
| 441 | {Opt_undelete, "undelete"}, |
| 442 | {Opt_noadinicb, "noadinicb"}, |
| 443 | {Opt_adinicb, "adinicb"}, |
| 444 | {Opt_shortad, "shortad"}, |
| 445 | {Opt_longad, "longad"}, |
| 446 | {Opt_uforget, "uid=forget"}, |
| 447 | {Opt_uignore, "uid=ignore"}, |
| 448 | {Opt_gforget, "gid=forget"}, |
| 449 | {Opt_gignore, "gid=ignore"}, |
| 450 | {Opt_gid, "gid=%u"}, |
| 451 | {Opt_uid, "uid=%u"}, |
| 452 | {Opt_umask, "umask=%o"}, |
| 453 | {Opt_session, "session=%u"}, |
| 454 | {Opt_lastblock, "lastblock=%u"}, |
| 455 | {Opt_anchor, "anchor=%u"}, |
| 456 | {Opt_volume, "volume=%u"}, |
| 457 | {Opt_partition, "partition=%u"}, |
| 458 | {Opt_fileset, "fileset=%u"}, |
| 459 | {Opt_rootdir, "rootdir=%u"}, |
| 460 | {Opt_utf8, "utf8"}, |
| 461 | {Opt_iocharset, "iocharset=%s"}, |
Marcin Slusarz | 7ac9bcd5 | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 462 | {Opt_fmode, "mode=%o"}, |
| 463 | {Opt_dmode, "dmode=%o"}, |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 464 | {Opt_err, NULL} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | }; |
| 466 | |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 467 | static int udf_parse_options(char *options, struct udf_options *uopt, |
| 468 | bool remount) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | { |
| 470 | char *p; |
| 471 | int option; |
| 472 | |
| 473 | uopt->novrs = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | uopt->partition = 0xFFFF; |
| 475 | uopt->session = 0xFFFFFFFF; |
| 476 | uopt->lastblock = 0; |
| 477 | uopt->anchor = 0; |
| 478 | uopt->volume = 0xFFFFFFFF; |
| 479 | uopt->rootdir = 0xFFFFFFFF; |
| 480 | uopt->fileset = 0xFFFFFFFF; |
| 481 | uopt->nls_map = NULL; |
| 482 | |
| 483 | if (!options) |
| 484 | return 1; |
| 485 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 486 | while ((p = strsep(&options, ",")) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | substring_t args[MAX_OPT_ARGS]; |
| 488 | int token; |
| 489 | if (!*p) |
| 490 | continue; |
| 491 | |
| 492 | token = match_token(p, tokens, args); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 493 | switch (token) { |
| 494 | case Opt_novrs: |
| 495 | uopt->novrs = 1; |
Clemens Ladisch | 4136801 | 2009-03-06 09:16:49 +0100 | [diff] [blame] | 496 | break; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 497 | case Opt_bs: |
| 498 | if (match_int(&args[0], &option)) |
| 499 | return 0; |
| 500 | uopt->blocksize = option; |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 501 | uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 502 | break; |
| 503 | case Opt_unhide: |
| 504 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); |
| 505 | break; |
| 506 | case Opt_undelete: |
| 507 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); |
| 508 | break; |
| 509 | case Opt_noadinicb: |
| 510 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); |
| 511 | break; |
| 512 | case Opt_adinicb: |
| 513 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); |
| 514 | break; |
| 515 | case Opt_shortad: |
| 516 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); |
| 517 | break; |
| 518 | case Opt_longad: |
| 519 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); |
| 520 | break; |
| 521 | case Opt_gid: |
| 522 | if (match_int(args, &option)) |
| 523 | return 0; |
| 524 | uopt->gid = option; |
Cyrill Gorcunov | ca76d2d | 2007-07-31 00:39:40 -0700 | [diff] [blame] | 525 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 526 | break; |
| 527 | case Opt_uid: |
| 528 | if (match_int(args, &option)) |
| 529 | return 0; |
| 530 | uopt->uid = option; |
Cyrill Gorcunov | ca76d2d | 2007-07-31 00:39:40 -0700 | [diff] [blame] | 531 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 532 | break; |
| 533 | case Opt_umask: |
| 534 | if (match_octal(args, &option)) |
| 535 | return 0; |
| 536 | uopt->umask = option; |
| 537 | break; |
| 538 | case Opt_nostrict: |
| 539 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); |
| 540 | break; |
| 541 | case Opt_session: |
| 542 | if (match_int(args, &option)) |
| 543 | return 0; |
| 544 | uopt->session = option; |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 545 | if (!remount) |
| 546 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 547 | break; |
| 548 | case Opt_lastblock: |
| 549 | if (match_int(args, &option)) |
| 550 | return 0; |
| 551 | uopt->lastblock = option; |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 552 | if (!remount) |
| 553 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 554 | break; |
| 555 | case Opt_anchor: |
| 556 | if (match_int(args, &option)) |
| 557 | return 0; |
| 558 | uopt->anchor = option; |
| 559 | break; |
| 560 | case Opt_volume: |
| 561 | if (match_int(args, &option)) |
| 562 | return 0; |
| 563 | uopt->volume = option; |
| 564 | break; |
| 565 | case Opt_partition: |
| 566 | if (match_int(args, &option)) |
| 567 | return 0; |
| 568 | uopt->partition = option; |
| 569 | break; |
| 570 | case Opt_fileset: |
| 571 | if (match_int(args, &option)) |
| 572 | return 0; |
| 573 | uopt->fileset = option; |
| 574 | break; |
| 575 | case Opt_rootdir: |
| 576 | if (match_int(args, &option)) |
| 577 | return 0; |
| 578 | uopt->rootdir = option; |
| 579 | break; |
| 580 | case Opt_utf8: |
| 581 | uopt->flags |= (1 << UDF_FLAG_UTF8); |
| 582 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | #ifdef CONFIG_UDF_NLS |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 584 | case Opt_iocharset: |
| 585 | uopt->nls_map = load_nls(args[0].from); |
| 586 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); |
| 587 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | #endif |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 589 | case Opt_uignore: |
| 590 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); |
| 591 | break; |
| 592 | case Opt_uforget: |
| 593 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); |
| 594 | break; |
| 595 | case Opt_gignore: |
| 596 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); |
| 597 | break; |
| 598 | case Opt_gforget: |
| 599 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); |
| 600 | break; |
Marcin Slusarz | 7ac9bcd5 | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 601 | case Opt_fmode: |
| 602 | if (match_octal(args, &option)) |
| 603 | return 0; |
| 604 | uopt->fmode = option & 0777; |
| 605 | break; |
| 606 | case Opt_dmode: |
| 607 | if (match_octal(args, &option)) |
| 608 | return 0; |
| 609 | uopt->dmode = option & 0777; |
| 610 | break; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 611 | default: |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 612 | pr_err("bad mount option \"%s\" or missing value\n", p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | return 0; |
| 614 | } |
| 615 | } |
| 616 | return 1; |
| 617 | } |
| 618 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 619 | static int udf_remount_fs(struct super_block *sb, int *flags, char *options) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | { |
| 621 | struct udf_options uopt; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 622 | struct udf_sb_info *sbi = UDF_SB(sb); |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 623 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 625 | uopt.flags = sbi->s_flags; |
| 626 | uopt.uid = sbi->s_uid; |
| 627 | uopt.gid = sbi->s_gid; |
| 628 | uopt.umask = sbi->s_umask; |
Marcin Slusarz | 7ac9bcd5 | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 629 | uopt.fmode = sbi->s_fmode; |
| 630 | uopt.dmode = sbi->s_dmode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 632 | if (!udf_parse_options(options, &uopt, true)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | return -EINVAL; |
| 634 | |
Jan Kara | c03cad2 | 2010-10-20 22:17:28 +0200 | [diff] [blame] | 635 | write_lock(&sbi->s_cred_lock); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 636 | sbi->s_flags = uopt.flags; |
| 637 | sbi->s_uid = uopt.uid; |
| 638 | sbi->s_gid = uopt.gid; |
| 639 | sbi->s_umask = uopt.umask; |
Marcin Slusarz | 7ac9bcd5 | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 640 | sbi->s_fmode = uopt.fmode; |
| 641 | sbi->s_dmode = uopt.dmode; |
Jan Kara | c03cad2 | 2010-10-20 22:17:28 +0200 | [diff] [blame] | 642 | write_unlock(&sbi->s_cred_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 644 | if (sbi->s_lvid_bh) { |
| 645 | int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | if (write_rev > UDF_MAX_WRITE_VERSION) |
| 647 | *flags |= MS_RDONLY; |
| 648 | } |
| 649 | |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 650 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
| 651 | goto out_unlock; |
| 652 | |
Jan Kara | 3635046 | 2010-05-19 16:28:56 +0200 | [diff] [blame] | 653 | if (*flags & MS_RDONLY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | udf_close_lvid(sb); |
Jan Kara | 3635046 | 2010-05-19 16:28:56 +0200 | [diff] [blame] | 655 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | udf_open_lvid(sb); |
| 657 | |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 658 | out_unlock: |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 659 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | } |
| 661 | |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 662 | /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ |
| 663 | /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ |
| 664 | static loff_t udf_check_vsd(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | { |
| 666 | struct volStructDesc *vsd = NULL; |
Sebastian Manciulea | f4bcbbd | 2008-04-08 14:02:11 +0200 | [diff] [blame] | 667 | loff_t sector = 32768; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | int sectorsize; |
| 669 | struct buffer_head *bh = NULL; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 670 | int nsr02 = 0; |
| 671 | int nsr03 = 0; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 672 | struct udf_sb_info *sbi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 674 | sbi = UDF_SB(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | if (sb->s_blocksize < sizeof(struct volStructDesc)) |
| 676 | sectorsize = sizeof(struct volStructDesc); |
| 677 | else |
| 678 | sectorsize = sb->s_blocksize; |
| 679 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 680 | sector += (sbi->s_session << sb->s_blocksize_bits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | |
| 682 | udf_debug("Starting at sector %u (%ld byte sectors)\n", |
Sebastian Manciulea | 706047a | 2008-04-14 17:13:01 +0200 | [diff] [blame] | 683 | (unsigned int)(sector >> sb->s_blocksize_bits), |
| 684 | sb->s_blocksize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | /* Process the sequence (if applicable) */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 686 | for (; !nsr02 && !nsr03; sector += sectorsize) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | /* Read a block */ |
| 688 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); |
| 689 | if (!bh) |
| 690 | break; |
| 691 | |
| 692 | /* Look for ISO descriptors */ |
| 693 | vsd = (struct volStructDesc *)(bh->b_data + |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 694 | (sector & (sb->s_blocksize - 1))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 696 | if (vsd->stdIdent[0] == 0) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 697 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | break; |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 699 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
| 700 | VSD_STD_ID_LEN)) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 701 | switch (vsd->structType) { |
| 702 | case 0: |
| 703 | udf_debug("ISO9660 Boot Record found\n"); |
| 704 | break; |
| 705 | case 1: |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 706 | udf_debug("ISO9660 Primary Volume Descriptor found\n"); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 707 | break; |
| 708 | case 2: |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 709 | udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 710 | break; |
| 711 | case 3: |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 712 | udf_debug("ISO9660 Volume Partition Descriptor found\n"); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 713 | break; |
| 714 | case 255: |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 715 | udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 716 | break; |
| 717 | default: |
| 718 | udf_debug("ISO9660 VRS (%u) found\n", |
| 719 | vsd->structType); |
| 720 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | } |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 722 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
| 723 | VSD_STD_ID_LEN)) |
| 724 | ; /* nothing */ |
| 725 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, |
| 726 | VSD_STD_ID_LEN)) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 727 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | break; |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 729 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
| 730 | VSD_STD_ID_LEN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | nsr02 = sector; |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 732 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
| 733 | VSD_STD_ID_LEN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | nsr03 = sector; |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 735 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | } |
| 737 | |
| 738 | if (nsr03) |
| 739 | return nsr03; |
| 740 | else if (nsr02) |
| 741 | return nsr02; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 742 | else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | return -1; |
| 744 | else |
| 745 | return 0; |
| 746 | } |
| 747 | |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 748 | static int udf_find_fileset(struct super_block *sb, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 749 | struct kernel_lb_addr *fileset, |
| 750 | struct kernel_lb_addr *root) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | { |
| 752 | struct buffer_head *bh = NULL; |
| 753 | long lastblock; |
| 754 | uint16_t ident; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 755 | struct udf_sb_info *sbi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | |
| 757 | if (fileset->logicalBlockNum != 0xFFFFFFFF || |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 758 | fileset->partitionReferenceNum != 0xFFFF) { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 759 | bh = udf_read_ptagged(sb, fileset, 0, &ident); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 761 | if (!bh) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | return 1; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 763 | } else if (ident != TAG_IDENT_FSD) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 764 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | return 1; |
| 766 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 767 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | } |
| 769 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 770 | sbi = UDF_SB(sb); |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 771 | if (!bh) { |
| 772 | /* Search backwards through the partitions */ |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 773 | struct kernel_lb_addr newfileset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 775 | /* --> cvg: FIXME - is it reasonable? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | return 1; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 777 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 778 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 779 | (newfileset.partitionReferenceNum != 0xFFFF && |
| 780 | fileset->logicalBlockNum == 0xFFFFFFFF && |
| 781 | fileset->partitionReferenceNum == 0xFFFF); |
| 782 | newfileset.partitionReferenceNum--) { |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 783 | lastblock = sbi->s_partmaps |
| 784 | [newfileset.partitionReferenceNum] |
| 785 | .s_partition_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | newfileset.logicalBlockNum = 0; |
| 787 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 788 | do { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 789 | bh = udf_read_ptagged(sb, &newfileset, 0, |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 790 | &ident); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 791 | if (!bh) { |
| 792 | newfileset.logicalBlockNum++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | continue; |
| 794 | } |
| 795 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 796 | switch (ident) { |
| 797 | case TAG_IDENT_SBD: |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 798 | { |
| 799 | struct spaceBitmapDesc *sp; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 800 | sp = (struct spaceBitmapDesc *) |
| 801 | bh->b_data; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 802 | newfileset.logicalBlockNum += 1 + |
| 803 | ((le32_to_cpu(sp->numOfBytes) + |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 804 | sizeof(struct spaceBitmapDesc) |
| 805 | - 1) >> sb->s_blocksize_bits); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 806 | brelse(bh); |
| 807 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 809 | case TAG_IDENT_FSD: |
| 810 | *fileset = newfileset; |
| 811 | break; |
| 812 | default: |
| 813 | newfileset.logicalBlockNum++; |
| 814 | brelse(bh); |
| 815 | bh = NULL; |
| 816 | break; |
| 817 | } |
| 818 | } while (newfileset.logicalBlockNum < lastblock && |
| 819 | fileset->logicalBlockNum == 0xFFFFFFFF && |
| 820 | fileset->partitionReferenceNum == 0xFFFF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | } |
| 822 | } |
| 823 | |
| 824 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 825 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | udf_debug("Fileset at block=%d, partition=%d\n", |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 827 | fileset->logicalBlockNum, |
| 828 | fileset->partitionReferenceNum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 830 | sbi->s_partition = fileset->partitionReferenceNum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | udf_load_fileset(sb, bh, root); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 832 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | return 0; |
| 834 | } |
| 835 | return 1; |
| 836 | } |
| 837 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 838 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | { |
| 840 | struct primaryVolDesc *pvoldesc; |
Marcin Slusarz | ba9aadd | 2008-11-16 19:01:44 +0100 | [diff] [blame] | 841 | struct ustr *instr, *outstr; |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 842 | struct buffer_head *bh; |
| 843 | uint16_t ident; |
Marcin Slusarz | ba9aadd | 2008-11-16 19:01:44 +0100 | [diff] [blame] | 844 | int ret = 1; |
| 845 | |
| 846 | instr = kmalloc(sizeof(struct ustr), GFP_NOFS); |
| 847 | if (!instr) |
| 848 | return 1; |
| 849 | |
| 850 | outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); |
| 851 | if (!outstr) |
| 852 | goto out1; |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 853 | |
| 854 | bh = udf_read_tagged(sb, block, block, &ident); |
| 855 | if (!bh) |
Marcin Slusarz | ba9aadd | 2008-11-16 19:01:44 +0100 | [diff] [blame] | 856 | goto out2; |
| 857 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 858 | BUG_ON(ident != TAG_IDENT_PVD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | |
| 860 | pvoldesc = (struct primaryVolDesc *)bh->b_data; |
| 861 | |
Marcin Slusarz | 5677480 | 2008-02-10 11:25:31 +0100 | [diff] [blame] | 862 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
| 863 | pvoldesc->recordingDateAndTime)) { |
Marcin Slusarz | af15a29 | 2008-02-10 11:29:10 +0100 | [diff] [blame] | 864 | #ifdef UDFFS_DEBUG |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 865 | struct timestamp *ts = &pvoldesc->recordingDateAndTime; |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 866 | udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", |
Marcin Slusarz | af15a29 | 2008-02-10 11:29:10 +0100 | [diff] [blame] | 867 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, |
| 868 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); |
| 869 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | } |
| 871 | |
Marcin Slusarz | ba9aadd | 2008-11-16 19:01:44 +0100 | [diff] [blame] | 872 | if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) |
| 873 | if (udf_CS0toUTF8(outstr, instr)) { |
| 874 | strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, |
| 875 | outstr->u_len > 31 ? 31 : outstr->u_len); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 876 | udf_debug("volIdent[] = '%s'\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 877 | UDF_SB(sb)->s_volume_ident); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | |
Marcin Slusarz | ba9aadd | 2008-11-16 19:01:44 +0100 | [diff] [blame] | 880 | if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) |
| 881 | if (udf_CS0toUTF8(outstr, instr)) |
| 882 | udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 883 | |
| 884 | brelse(bh); |
Marcin Slusarz | ba9aadd | 2008-11-16 19:01:44 +0100 | [diff] [blame] | 885 | ret = 0; |
| 886 | out2: |
| 887 | kfree(outstr); |
| 888 | out1: |
| 889 | kfree(instr); |
| 890 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | } |
| 892 | |
Namjae Jeon | 3080a74 | 2011-10-23 19:28:32 +0900 | [diff] [blame] | 893 | struct inode *udf_find_metadata_inode_efe(struct super_block *sb, |
| 894 | u32 meta_file_loc, u32 partition_num) |
| 895 | { |
| 896 | struct kernel_lb_addr addr; |
| 897 | struct inode *metadata_fe; |
| 898 | |
| 899 | addr.logicalBlockNum = meta_file_loc; |
| 900 | addr.partitionReferenceNum = partition_num; |
| 901 | |
| 902 | metadata_fe = udf_iget(sb, &addr); |
| 903 | |
| 904 | if (metadata_fe == NULL) |
| 905 | udf_warn(sb, "metadata inode efe not found\n"); |
| 906 | else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { |
| 907 | udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); |
| 908 | iput(metadata_fe); |
| 909 | metadata_fe = NULL; |
| 910 | } |
| 911 | |
| 912 | return metadata_fe; |
| 913 | } |
| 914 | |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 915 | static int udf_load_metadata_files(struct super_block *sb, int partition) |
| 916 | { |
| 917 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 918 | struct udf_part_map *map; |
| 919 | struct udf_meta_data *mdata; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 920 | struct kernel_lb_addr addr; |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 921 | |
| 922 | map = &sbi->s_partmaps[partition]; |
| 923 | mdata = &map->s_type_specific.s_metadata; |
| 924 | |
| 925 | /* metadata address */ |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 926 | udf_debug("Metadata file location: block = %d part = %d\n", |
Namjae Jeon | 3080a74 | 2011-10-23 19:28:32 +0900 | [diff] [blame] | 927 | mdata->s_meta_file_loc, map->s_partition_num); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 928 | |
Namjae Jeon | 3080a74 | 2011-10-23 19:28:32 +0900 | [diff] [blame] | 929 | mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb, |
| 930 | mdata->s_meta_file_loc, map->s_partition_num); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 931 | |
| 932 | if (mdata->s_metadata_fe == NULL) { |
Namjae Jeon | 3080a74 | 2011-10-23 19:28:32 +0900 | [diff] [blame] | 933 | /* mirror file entry */ |
| 934 | udf_debug("Mirror metadata file location: block = %d part = %d\n", |
| 935 | mdata->s_mirror_file_loc, map->s_partition_num); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 936 | |
Namjae Jeon | 3080a74 | 2011-10-23 19:28:32 +0900 | [diff] [blame] | 937 | mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb, |
| 938 | mdata->s_mirror_file_loc, map->s_partition_num); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 939 | |
Namjae Jeon | 3080a74 | 2011-10-23 19:28:32 +0900 | [diff] [blame] | 940 | if (mdata->s_mirror_fe == NULL) { |
| 941 | udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n"); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 942 | goto error_exit; |
Namjae Jeon | 3080a74 | 2011-10-23 19:28:32 +0900 | [diff] [blame] | 943 | } |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 944 | } |
| 945 | |
| 946 | /* |
| 947 | * bitmap file entry |
| 948 | * Note: |
| 949 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) |
| 950 | */ |
| 951 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { |
| 952 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; |
| 953 | addr.partitionReferenceNum = map->s_partition_num; |
| 954 | |
| 955 | udf_debug("Bitmap file location: block = %d part = %d\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 956 | addr.logicalBlockNum, addr.partitionReferenceNum); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 957 | |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 958 | mdata->s_bitmap_fe = udf_iget(sb, &addr); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 959 | |
| 960 | if (mdata->s_bitmap_fe == NULL) { |
| 961 | if (sb->s_flags & MS_RDONLY) |
Joe Perches | a40ecd7 | 2011-10-10 01:08:04 -0700 | [diff] [blame] | 962 | udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n"); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 963 | else { |
Joe Perches | 8076c36 | 2011-10-10 01:08:03 -0700 | [diff] [blame] | 964 | udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n"); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 965 | goto error_exit; |
| 966 | } |
| 967 | } |
| 968 | } |
| 969 | |
| 970 | udf_debug("udf_load_metadata_files Ok\n"); |
| 971 | |
| 972 | return 0; |
| 973 | |
| 974 | error_exit: |
| 975 | return 1; |
| 976 | } |
| 977 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 978 | static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 979 | struct kernel_lb_addr *root) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | { |
| 981 | struct fileSetDesc *fset; |
| 982 | |
| 983 | fset = (struct fileSetDesc *)bh->b_data; |
| 984 | |
| 985 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); |
| 986 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 987 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 989 | udf_debug("Rootdir at block=%d, partition=%d\n", |
| 990 | root->logicalBlockNum, root->partitionReferenceNum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | } |
| 992 | |
Marcin Slusarz | 883cb9d | 2008-02-08 04:20:34 -0800 | [diff] [blame] | 993 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
| 994 | { |
| 995 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; |
Julia Lawall | 8dee00b | 2008-02-14 16:15:45 +0100 | [diff] [blame] | 996 | return DIV_ROUND_UP(map->s_partition_len + |
| 997 | (sizeof(struct spaceBitmapDesc) << 3), |
| 998 | sb->s_blocksize * 8); |
Marcin Slusarz | 883cb9d | 2008-02-08 04:20:34 -0800 | [diff] [blame] | 999 | } |
| 1000 | |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 1001 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
| 1002 | { |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 1003 | struct udf_bitmap *bitmap; |
| 1004 | int nr_groups; |
| 1005 | int size; |
| 1006 | |
Marcin Slusarz | 883cb9d | 2008-02-08 04:20:34 -0800 | [diff] [blame] | 1007 | nr_groups = udf_compute_nr_groups(sb, index); |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 1008 | size = sizeof(struct udf_bitmap) + |
| 1009 | (sizeof(struct buffer_head *) * nr_groups); |
| 1010 | |
| 1011 | if (size <= PAGE_SIZE) |
Joe Perches | ed2ae6f | 2010-11-04 20:08:04 -0700 | [diff] [blame] | 1012 | bitmap = kzalloc(size, GFP_KERNEL); |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 1013 | else |
Joe Perches | ed2ae6f | 2010-11-04 20:08:04 -0700 | [diff] [blame] | 1014 | bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 1015 | |
Joe Perches | 75b09e0 | 2012-01-31 14:42:10 -0800 | [diff] [blame] | 1016 | if (bitmap == NULL) |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 1017 | return NULL; |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 1018 | |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 1019 | bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); |
| 1020 | bitmap->s_nr_groups = nr_groups; |
| 1021 | return bitmap; |
| 1022 | } |
| 1023 | |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1024 | static int udf_fill_partdesc_info(struct super_block *sb, |
| 1025 | struct partitionDesc *p, int p_index) |
| 1026 | { |
| 1027 | struct udf_part_map *map; |
| 1028 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1029 | struct partitionHeaderDesc *phd; |
| 1030 | |
| 1031 | map = &sbi->s_partmaps[p_index]; |
| 1032 | |
| 1033 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ |
| 1034 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); |
| 1035 | |
| 1036 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) |
| 1037 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; |
| 1038 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) |
| 1039 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; |
| 1040 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) |
| 1041 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; |
| 1042 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) |
| 1043 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; |
| 1044 | |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1045 | udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n", |
| 1046 | p_index, map->s_partition_type, |
| 1047 | map->s_partition_root, map->s_partition_len); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1048 | |
| 1049 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && |
| 1050 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) |
| 1051 | return 0; |
| 1052 | |
| 1053 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; |
| 1054 | if (phd->unallocSpaceTable.extLength) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1055 | struct kernel_lb_addr loc = { |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1056 | .logicalBlockNum = le32_to_cpu( |
| 1057 | phd->unallocSpaceTable.extPosition), |
| 1058 | .partitionReferenceNum = p_index, |
| 1059 | }; |
| 1060 | |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1061 | map->s_uspace.s_table = udf_iget(sb, &loc); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1062 | if (!map->s_uspace.s_table) { |
| 1063 | udf_debug("cannot load unallocSpaceTable (part %d)\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1064 | p_index); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1065 | return 1; |
| 1066 | } |
| 1067 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; |
| 1068 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1069 | p_index, map->s_uspace.s_table->i_ino); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1070 | } |
| 1071 | |
| 1072 | if (phd->unallocSpaceBitmap.extLength) { |
| 1073 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
| 1074 | if (!bitmap) |
| 1075 | return 1; |
| 1076 | map->s_uspace.s_bitmap = bitmap; |
| 1077 | bitmap->s_extLength = le32_to_cpu( |
| 1078 | phd->unallocSpaceBitmap.extLength); |
| 1079 | bitmap->s_extPosition = le32_to_cpu( |
| 1080 | phd->unallocSpaceBitmap.extPosition); |
| 1081 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1082 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", |
| 1083 | p_index, bitmap->s_extPosition); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1084 | } |
| 1085 | |
| 1086 | if (phd->partitionIntegrityTable.extLength) |
| 1087 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); |
| 1088 | |
| 1089 | if (phd->freedSpaceTable.extLength) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1090 | struct kernel_lb_addr loc = { |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1091 | .logicalBlockNum = le32_to_cpu( |
| 1092 | phd->freedSpaceTable.extPosition), |
| 1093 | .partitionReferenceNum = p_index, |
| 1094 | }; |
| 1095 | |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1096 | map->s_fspace.s_table = udf_iget(sb, &loc); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1097 | if (!map->s_fspace.s_table) { |
| 1098 | udf_debug("cannot load freedSpaceTable (part %d)\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1099 | p_index); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1100 | return 1; |
| 1101 | } |
| 1102 | |
| 1103 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; |
| 1104 | udf_debug("freedSpaceTable (part %d) @ %ld\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1105 | p_index, map->s_fspace.s_table->i_ino); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1106 | } |
| 1107 | |
| 1108 | if (phd->freedSpaceBitmap.extLength) { |
| 1109 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
| 1110 | if (!bitmap) |
| 1111 | return 1; |
| 1112 | map->s_fspace.s_bitmap = bitmap; |
| 1113 | bitmap->s_extLength = le32_to_cpu( |
| 1114 | phd->freedSpaceBitmap.extLength); |
| 1115 | bitmap->s_extPosition = le32_to_cpu( |
| 1116 | phd->freedSpaceBitmap.extPosition); |
| 1117 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1118 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", |
| 1119 | p_index, bitmap->s_extPosition); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1120 | } |
| 1121 | return 0; |
| 1122 | } |
| 1123 | |
Jan Kara | e971b0b | 2009-11-30 19:47:55 +0100 | [diff] [blame] | 1124 | static void udf_find_vat_block(struct super_block *sb, int p_index, |
| 1125 | int type1_index, sector_t start_block) |
| 1126 | { |
| 1127 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1128 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; |
| 1129 | sector_t vat_block; |
| 1130 | struct kernel_lb_addr ino; |
| 1131 | |
| 1132 | /* |
| 1133 | * VAT file entry is in the last recorded block. Some broken disks have |
| 1134 | * it a few blocks before so try a bit harder... |
| 1135 | */ |
| 1136 | ino.partitionReferenceNum = type1_index; |
| 1137 | for (vat_block = start_block; |
| 1138 | vat_block >= map->s_partition_root && |
| 1139 | vat_block >= start_block - 3 && |
| 1140 | !sbi->s_vat_inode; vat_block--) { |
| 1141 | ino.logicalBlockNum = vat_block - map->s_partition_root; |
| 1142 | sbi->s_vat_inode = udf_iget(sb, &ino); |
| 1143 | } |
| 1144 | } |
| 1145 | |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1146 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) |
| 1147 | { |
| 1148 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1149 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; |
Jan Kara | fa5e081 | 2008-04-08 02:08:53 +0200 | [diff] [blame] | 1150 | struct buffer_head *bh = NULL; |
| 1151 | struct udf_inode_info *vati; |
| 1152 | uint32_t pos; |
| 1153 | struct virtualAllocationTable20 *vat20; |
Jan Kara | 4bf17af | 2009-07-14 19:30:23 +0200 | [diff] [blame] | 1154 | sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1155 | |
Jan Kara | e971b0b | 2009-11-30 19:47:55 +0100 | [diff] [blame] | 1156 | udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block); |
Jan Kara | 4bf17af | 2009-07-14 19:30:23 +0200 | [diff] [blame] | 1157 | if (!sbi->s_vat_inode && |
| 1158 | sbi->s_last_block != blocks - 1) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1159 | pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", |
| 1160 | (unsigned long)sbi->s_last_block, |
| 1161 | (unsigned long)blocks - 1); |
Jan Kara | e971b0b | 2009-11-30 19:47:55 +0100 | [diff] [blame] | 1162 | udf_find_vat_block(sb, p_index, type1_index, blocks - 1); |
Jan Kara | 4bf17af | 2009-07-14 19:30:23 +0200 | [diff] [blame] | 1163 | } |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1164 | if (!sbi->s_vat_inode) |
| 1165 | return 1; |
| 1166 | |
| 1167 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { |
Sebastian Manciulea | 47c9358 | 2008-04-14 17:06:36 +0200 | [diff] [blame] | 1168 | map->s_type_specific.s_virtual.s_start_offset = 0; |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1169 | map->s_type_specific.s_virtual.s_num_entries = |
| 1170 | (sbi->s_vat_inode->i_size - 36) >> 2; |
| 1171 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { |
Jan Kara | fa5e081 | 2008-04-08 02:08:53 +0200 | [diff] [blame] | 1172 | vati = UDF_I(sbi->s_vat_inode); |
| 1173 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
| 1174 | pos = udf_block_map(sbi->s_vat_inode, 0); |
| 1175 | bh = sb_bread(sb, pos); |
| 1176 | if (!bh) |
| 1177 | return 1; |
| 1178 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; |
| 1179 | } else { |
| 1180 | vat20 = (struct virtualAllocationTable20 *) |
| 1181 | vati->i_ext.i_data; |
| 1182 | } |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1183 | |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1184 | map->s_type_specific.s_virtual.s_start_offset = |
Sebastian Manciulea | 47c9358 | 2008-04-14 17:06:36 +0200 | [diff] [blame] | 1185 | le16_to_cpu(vat20->lengthHeader); |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1186 | map->s_type_specific.s_virtual.s_num_entries = |
| 1187 | (sbi->s_vat_inode->i_size - |
| 1188 | map->s_type_specific.s_virtual. |
| 1189 | s_start_offset) >> 2; |
| 1190 | brelse(bh); |
| 1191 | } |
| 1192 | return 0; |
| 1193 | } |
| 1194 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1195 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | { |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1197 | struct buffer_head *bh; |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1198 | struct partitionDesc *p; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1199 | struct udf_part_map *map; |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1200 | struct udf_sb_info *sbi = UDF_SB(sb); |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1201 | int i, type1_idx; |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1202 | uint16_t partitionNumber; |
| 1203 | uint16_t ident; |
| 1204 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1206 | bh = udf_read_tagged(sb, block, block, &ident); |
| 1207 | if (!bh) |
| 1208 | return 1; |
| 1209 | if (ident != TAG_IDENT_PD) |
| 1210 | goto out_bh; |
| 1211 | |
| 1212 | p = (struct partitionDesc *)bh->b_data; |
| 1213 | partitionNumber = le16_to_cpu(p->partitionNumber); |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1214 | |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1215 | /* First scan for TYPE1, SPARABLE and METADATA partitions */ |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1216 | for (i = 0; i < sbi->s_partitions; i++) { |
| 1217 | map = &sbi->s_partmaps[i]; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1218 | udf_debug("Searching map: (%d == %d)\n", |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1219 | map->s_partition_num, partitionNumber); |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1220 | if (map->s_partition_num == partitionNumber && |
| 1221 | (map->s_partition_type == UDF_TYPE1_MAP15 || |
| 1222 | map->s_partition_type == UDF_SPARABLE_MAP15)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | break; |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1224 | } |
| 1225 | |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1226 | if (i >= sbi->s_partitions) { |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1227 | udf_debug("Partition (%d) not found in partition map\n", |
| 1228 | partitionNumber); |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1229 | goto out_bh; |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1230 | } |
| 1231 | |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1232 | ret = udf_fill_partdesc_info(sb, p, i); |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1233 | |
| 1234 | /* |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1235 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
| 1236 | * PHYSICAL partitions are already set up |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1237 | */ |
| 1238 | type1_idx = i; |
| 1239 | for (i = 0; i < sbi->s_partitions; i++) { |
| 1240 | map = &sbi->s_partmaps[i]; |
| 1241 | |
| 1242 | if (map->s_partition_num == partitionNumber && |
| 1243 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1244 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
| 1245 | map->s_partition_type == UDF_METADATA_MAP25)) |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1246 | break; |
| 1247 | } |
| 1248 | |
| 1249 | if (i >= sbi->s_partitions) |
| 1250 | goto out_bh; |
| 1251 | |
| 1252 | ret = udf_fill_partdesc_info(sb, p, i); |
| 1253 | if (ret) |
| 1254 | goto out_bh; |
| 1255 | |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1256 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
| 1257 | ret = udf_load_metadata_files(sb, i); |
| 1258 | if (ret) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1259 | udf_err(sb, "error loading MetaData partition map %d\n", |
| 1260 | i); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1261 | goto out_bh; |
| 1262 | } |
| 1263 | } else { |
| 1264 | ret = udf_load_vat(sb, i, type1_idx); |
| 1265 | if (ret) |
| 1266 | goto out_bh; |
| 1267 | /* |
| 1268 | * Mark filesystem read-only if we have a partition with |
| 1269 | * virtual map since we don't handle writing to it (we |
| 1270 | * overwrite blocks instead of relocating them). |
| 1271 | */ |
| 1272 | sb->s_flags |= MS_RDONLY; |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1273 | pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n"); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1274 | } |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1275 | out_bh: |
Jan Kara | 2e0838f | 2008-04-01 18:08:51 +0200 | [diff] [blame] | 1276 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1277 | brelse(bh); |
| 1278 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | } |
| 1280 | |
Jan Kara | 1df2ae3 | 2012-06-27 21:23:07 +0200 | [diff] [blame] | 1281 | static int udf_load_sparable_map(struct super_block *sb, |
| 1282 | struct udf_part_map *map, |
| 1283 | struct sparablePartitionMap *spm) |
| 1284 | { |
| 1285 | uint32_t loc; |
| 1286 | uint16_t ident; |
| 1287 | struct sparingTable *st; |
| 1288 | struct udf_sparing_data *sdata = &map->s_type_specific.s_sparing; |
| 1289 | int i; |
| 1290 | struct buffer_head *bh; |
| 1291 | |
| 1292 | map->s_partition_type = UDF_SPARABLE_MAP15; |
| 1293 | sdata->s_packet_len = le16_to_cpu(spm->packetLength); |
| 1294 | if (!is_power_of_2(sdata->s_packet_len)) { |
| 1295 | udf_err(sb, "error loading logical volume descriptor: " |
| 1296 | "Invalid packet length %u\n", |
| 1297 | (unsigned)sdata->s_packet_len); |
| 1298 | return -EIO; |
| 1299 | } |
| 1300 | if (spm->numSparingTables > 4) { |
| 1301 | udf_err(sb, "error loading logical volume descriptor: " |
| 1302 | "Too many sparing tables (%d)\n", |
| 1303 | (int)spm->numSparingTables); |
| 1304 | return -EIO; |
| 1305 | } |
| 1306 | |
| 1307 | for (i = 0; i < spm->numSparingTables; i++) { |
| 1308 | loc = le32_to_cpu(spm->locSparingTable[i]); |
| 1309 | bh = udf_read_tagged(sb, loc, loc, &ident); |
| 1310 | if (!bh) |
| 1311 | continue; |
| 1312 | |
| 1313 | st = (struct sparingTable *)bh->b_data; |
| 1314 | if (ident != 0 || |
| 1315 | strncmp(st->sparingIdent.ident, UDF_ID_SPARING, |
| 1316 | strlen(UDF_ID_SPARING)) || |
| 1317 | sizeof(*st) + le16_to_cpu(st->reallocationTableLen) > |
| 1318 | sb->s_blocksize) { |
| 1319 | brelse(bh); |
| 1320 | continue; |
| 1321 | } |
| 1322 | |
| 1323 | sdata->s_spar_map[i] = bh; |
| 1324 | } |
| 1325 | map->s_partition_func = udf_get_pblock_spar15; |
| 1326 | return 0; |
| 1327 | } |
| 1328 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1329 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1330 | struct kernel_lb_addr *fileset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | { |
| 1332 | struct logicalVolDesc *lvd; |
Jan Kara | 1df2ae3 | 2012-06-27 21:23:07 +0200 | [diff] [blame] | 1333 | int i, offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | uint8_t type; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1335 | struct udf_sb_info *sbi = UDF_SB(sb); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1336 | struct genericPartitionMap *gpm; |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1337 | uint16_t ident; |
| 1338 | struct buffer_head *bh; |
Jan Kara | adee11b | 2012-06-27 20:20:22 +0200 | [diff] [blame] | 1339 | unsigned int table_len; |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1340 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1342 | bh = udf_read_tagged(sb, block, block, &ident); |
| 1343 | if (!bh) |
| 1344 | return 1; |
| 1345 | BUG_ON(ident != TAG_IDENT_LVD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | lvd = (struct logicalVolDesc *)bh->b_data; |
Jan Kara | adee11b | 2012-06-27 20:20:22 +0200 | [diff] [blame] | 1347 | table_len = le32_to_cpu(lvd->mapTableLength); |
Jan Kara | 57b9655 | 2012-07-10 17:58:04 +0200 | [diff] [blame] | 1348 | if (table_len > sb->s_blocksize - sizeof(*lvd)) { |
Jan Kara | adee11b | 2012-06-27 20:20:22 +0200 | [diff] [blame] | 1349 | udf_err(sb, "error loading logical volume descriptor: " |
| 1350 | "Partition table too long (%u > %lu)\n", table_len, |
| 1351 | sb->s_blocksize - sizeof(*lvd)); |
Nikola Pajkovsky | 68766a2 | 2012-08-15 00:38:08 +0200 | [diff] [blame] | 1352 | ret = 1; |
Jan Kara | adee11b | 2012-06-27 20:20:22 +0200 | [diff] [blame] | 1353 | goto out_bh; |
| 1354 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | |
Jan Kara | cb14d34 | 2012-06-27 20:08:44 +0200 | [diff] [blame] | 1356 | ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
| 1357 | if (ret) |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1358 | goto out_bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1360 | for (i = 0, offset = 0; |
Jan Kara | adee11b | 2012-06-27 20:20:22 +0200 | [diff] [blame] | 1361 | i < sbi->s_partitions && offset < table_len; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1362 | i++, offset += gpm->partitionMapLength) { |
| 1363 | struct udf_part_map *map = &sbi->s_partmaps[i]; |
| 1364 | gpm = (struct genericPartitionMap *) |
| 1365 | &(lvd->partitionMaps[offset]); |
| 1366 | type = gpm->partitionMapType; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1367 | if (type == 1) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1368 | struct genericPartitionMap1 *gpm1 = |
| 1369 | (struct genericPartitionMap1 *)gpm; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1370 | map->s_partition_type = UDF_TYPE1_MAP15; |
| 1371 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); |
| 1372 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); |
| 1373 | map->s_partition_func = NULL; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1374 | } else if (type == 2) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1375 | struct udfPartitionMap2 *upm2 = |
| 1376 | (struct udfPartitionMap2 *)gpm; |
| 1377 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, |
| 1378 | strlen(UDF_ID_VIRTUAL))) { |
| 1379 | u16 suf = |
| 1380 | le16_to_cpu(((__le16 *)upm2->partIdent. |
| 1381 | identSuffix)[0]); |
Jan Kara | c82a127 | 2008-04-08 01:16:32 +0200 | [diff] [blame] | 1382 | if (suf < 0x0200) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1383 | map->s_partition_type = |
| 1384 | UDF_VIRTUAL_MAP15; |
| 1385 | map->s_partition_func = |
| 1386 | udf_get_pblock_virt15; |
Jan Kara | c82a127 | 2008-04-08 01:16:32 +0200 | [diff] [blame] | 1387 | } else { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1388 | map->s_partition_type = |
| 1389 | UDF_VIRTUAL_MAP20; |
| 1390 | map->s_partition_func = |
| 1391 | udf_get_pblock_virt20; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | } |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1393 | } else if (!strncmp(upm2->partIdent.ident, |
| 1394 | UDF_ID_SPARABLE, |
| 1395 | strlen(UDF_ID_SPARABLE))) { |
Jan Kara | 1df2ae3 | 2012-06-27 21:23:07 +0200 | [diff] [blame] | 1396 | if (udf_load_sparable_map(sb, map, |
Nikola Pajkovsky | 68766a2 | 2012-08-15 00:38:08 +0200 | [diff] [blame] | 1397 | (struct sparablePartitionMap *)gpm) < 0) { |
| 1398 | ret = 1; |
Jan Kara | 1df2ae3 | 2012-06-27 21:23:07 +0200 | [diff] [blame] | 1399 | goto out_bh; |
Nikola Pajkovsky | 68766a2 | 2012-08-15 00:38:08 +0200 | [diff] [blame] | 1400 | } |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1401 | } else if (!strncmp(upm2->partIdent.ident, |
| 1402 | UDF_ID_METADATA, |
| 1403 | strlen(UDF_ID_METADATA))) { |
| 1404 | struct udf_meta_data *mdata = |
| 1405 | &map->s_type_specific.s_metadata; |
| 1406 | struct metadataPartitionMap *mdm = |
| 1407 | (struct metadataPartitionMap *) |
| 1408 | &(lvd->partitionMaps[offset]); |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1409 | udf_debug("Parsing Logical vol part %d type %d id=%s\n", |
| 1410 | i, type, UDF_ID_METADATA); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1411 | |
| 1412 | map->s_partition_type = UDF_METADATA_MAP25; |
| 1413 | map->s_partition_func = udf_get_pblock_meta25; |
| 1414 | |
| 1415 | mdata->s_meta_file_loc = |
| 1416 | le32_to_cpu(mdm->metadataFileLoc); |
| 1417 | mdata->s_mirror_file_loc = |
| 1418 | le32_to_cpu(mdm->metadataMirrorFileLoc); |
| 1419 | mdata->s_bitmap_file_loc = |
| 1420 | le32_to_cpu(mdm->metadataBitmapFileLoc); |
| 1421 | mdata->s_alloc_unit_size = |
| 1422 | le32_to_cpu(mdm->allocUnitSize); |
| 1423 | mdata->s_align_unit_size = |
| 1424 | le16_to_cpu(mdm->alignUnitSize); |
Jan Kara | ed47a7d | 2011-10-24 16:47:48 +0200 | [diff] [blame] | 1425 | if (mdm->flags & 0x01) |
| 1426 | mdata->s_flags |= MF_DUPLICATE_MD; |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1427 | |
| 1428 | udf_debug("Metadata Ident suffix=0x%x\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1429 | le16_to_cpu(*(__le16 *) |
| 1430 | mdm->partIdent.identSuffix)); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1431 | udf_debug("Metadata part num=%d\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1432 | le16_to_cpu(mdm->partitionNum)); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1433 | udf_debug("Metadata part alloc unit size=%d\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1434 | le32_to_cpu(mdm->allocUnitSize)); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1435 | udf_debug("Metadata file loc=%d\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1436 | le32_to_cpu(mdm->metadataFileLoc)); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1437 | udf_debug("Mirror file loc=%d\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1438 | le32_to_cpu(mdm->metadataMirrorFileLoc)); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1439 | udf_debug("Bitmap file loc=%d\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1440 | le32_to_cpu(mdm->metadataBitmapFileLoc)); |
Jan Kara | ed47a7d | 2011-10-24 16:47:48 +0200 | [diff] [blame] | 1441 | udf_debug("Flags: %d %d\n", |
| 1442 | mdata->s_flags, mdm->flags); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1443 | } else { |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 1444 | udf_debug("Unknown ident: %s\n", |
| 1445 | upm2->partIdent.ident); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | continue; |
| 1447 | } |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1448 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
| 1449 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | } |
| 1451 | udf_debug("Partition (%d:%d) type %d on volume %d\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1452 | i, map->s_partition_num, type, map->s_volumeseqnum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | } |
| 1454 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1455 | if (fileset) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1456 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | |
| 1458 | *fileset = lelb_to_cpu(la->extLocation); |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1459 | udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n", |
| 1460 | fileset->logicalBlockNum, |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1461 | fileset->partitionReferenceNum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | } |
| 1463 | if (lvd->integritySeqExt.extLength) |
| 1464 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1465 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1466 | out_bh: |
| 1467 | brelse(bh); |
| 1468 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | } |
| 1470 | |
| 1471 | /* |
| 1472 | * udf_load_logicalvolint |
| 1473 | * |
| 1474 | */ |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1475 | static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | { |
| 1477 | struct buffer_head *bh = NULL; |
| 1478 | uint16_t ident; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1479 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1480 | struct logicalVolIntegrityDesc *lvid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | |
| 1482 | while (loc.extLength > 0 && |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1483 | (bh = udf_read_tagged(sb, loc.extLocation, |
| 1484 | loc.extLocation, &ident)) && |
| 1485 | ident == TAG_IDENT_LVID) { |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1486 | sbi->s_lvid_bh = bh; |
| 1487 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1488 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1489 | if (lvid->nextIntegrityExt.extLength) |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 1490 | udf_load_logicalvolint(sb, |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1491 | leea_to_cpu(lvid->nextIntegrityExt)); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1492 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1493 | if (sbi->s_lvid_bh != bh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1494 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1495 | loc.extLength -= sb->s_blocksize; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1496 | loc.extLocation++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | } |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1498 | if (sbi->s_lvid_bh != bh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1499 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | } |
| 1501 | |
| 1502 | /* |
| 1503 | * udf_process_sequence |
| 1504 | * |
| 1505 | * PURPOSE |
| 1506 | * Process a main/reserve volume descriptor sequence. |
| 1507 | * |
| 1508 | * PRE-CONDITIONS |
| 1509 | * sb Pointer to _locked_ superblock. |
| 1510 | * block First block of first extent of the sequence. |
| 1511 | * lastblock Lastblock of first extent of the sequence. |
| 1512 | * |
| 1513 | * HISTORY |
| 1514 | * July 1, 1997 - Andrew E. Mileski |
| 1515 | * Written, tested, and released. |
| 1516 | */ |
Jan Kara | 200a359 | 2008-03-04 13:03:09 +0100 | [diff] [blame] | 1517 | static noinline int udf_process_sequence(struct super_block *sb, long block, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1518 | long lastblock, struct kernel_lb_addr *fileset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | { |
| 1520 | struct buffer_head *bh = NULL; |
| 1521 | struct udf_vds_record vds[VDS_POS_LENGTH]; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1522 | struct udf_vds_record *curr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | struct generic_desc *gd; |
| 1524 | struct volDescPtr *vdp; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1525 | int done = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | uint32_t vdsn; |
| 1527 | uint16_t ident; |
| 1528 | long next_s = 0, next_e = 0; |
| 1529 | |
| 1530 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); |
| 1531 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1532 | /* |
| 1533 | * Read the main descriptor sequence and find which descriptors |
| 1534 | * are in it. |
| 1535 | */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1536 | for (; (!done && block <= lastblock); block++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | |
| 1538 | bh = udf_read_tagged(sb, block, block, &ident); |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1539 | if (!bh) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1540 | udf_err(sb, |
| 1541 | "Block %llu of volume descriptor sequence is corrupted or we could not read it\n", |
| 1542 | (unsigned long long)block); |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1543 | return 1; |
| 1544 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1545 | |
| 1546 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ |
| 1547 | gd = (struct generic_desc *)bh->b_data; |
| 1548 | vdsn = le32_to_cpu(gd->volDescSeqNum); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1549 | switch (ident) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1550 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1551 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
| 1552 | if (vdsn >= curr->volDescSeqNum) { |
| 1553 | curr->volDescSeqNum = vdsn; |
| 1554 | curr->block = block; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1555 | } |
| 1556 | break; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1557 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1558 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
| 1559 | if (vdsn >= curr->volDescSeqNum) { |
| 1560 | curr->volDescSeqNum = vdsn; |
| 1561 | curr->block = block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1563 | vdp = (struct volDescPtr *)bh->b_data; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1564 | next_s = le32_to_cpu( |
| 1565 | vdp->nextVolDescSeqExt.extLocation); |
| 1566 | next_e = le32_to_cpu( |
| 1567 | vdp->nextVolDescSeqExt.extLength); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1568 | next_e = next_e >> sb->s_blocksize_bits; |
| 1569 | next_e += next_s; |
| 1570 | } |
| 1571 | break; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1572 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1573 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
| 1574 | if (vdsn >= curr->volDescSeqNum) { |
| 1575 | curr->volDescSeqNum = vdsn; |
| 1576 | curr->block = block; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1577 | } |
| 1578 | break; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1579 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1580 | curr = &vds[VDS_POS_PARTITION_DESC]; |
| 1581 | if (!curr->block) |
| 1582 | curr->block = block; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1583 | break; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1584 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1585 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
| 1586 | if (vdsn >= curr->volDescSeqNum) { |
| 1587 | curr->volDescSeqNum = vdsn; |
| 1588 | curr->block = block; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1589 | } |
| 1590 | break; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1591 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1592 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
| 1593 | if (vdsn >= curr->volDescSeqNum) { |
| 1594 | curr->volDescSeqNum = vdsn; |
| 1595 | curr->block = block; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1596 | } |
| 1597 | break; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1598 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1599 | vds[VDS_POS_TERMINATING_DESC].block = block; |
| 1600 | if (next_e) { |
| 1601 | block = next_s; |
| 1602 | lastblock = next_e; |
| 1603 | next_s = next_e = 0; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1604 | } else |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1605 | done = 1; |
| 1606 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | } |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1608 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | } |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1610 | /* |
| 1611 | * Now read interesting descriptors again and process them |
| 1612 | * in a suitable order |
| 1613 | */ |
| 1614 | if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1615 | udf_err(sb, "Primary Volume Descriptor not found!\n"); |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1616 | return 1; |
| 1617 | } |
| 1618 | if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) |
| 1619 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1621 | if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, |
| 1622 | vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) |
| 1623 | return 1; |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1624 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1625 | if (vds[VDS_POS_PARTITION_DESC].block) { |
| 1626 | /* |
| 1627 | * We rescan the whole descriptor sequence to find |
| 1628 | * partition descriptor blocks and process them. |
| 1629 | */ |
| 1630 | for (block = vds[VDS_POS_PARTITION_DESC].block; |
| 1631 | block < vds[VDS_POS_TERMINATING_DESC].block; |
| 1632 | block++) |
| 1633 | if (udf_load_partdesc(sb, block)) |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1634 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | } |
| 1636 | |
| 1637 | return 0; |
| 1638 | } |
| 1639 | |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1640 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, |
| 1641 | struct kernel_lb_addr *fileset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1642 | { |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1643 | struct anchorVolDescPtr *anchor; |
| 1644 | long main_s, main_e, reserve_s, reserve_e; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1646 | anchor = (struct anchorVolDescPtr *)bh->b_data; |
| 1647 | |
| 1648 | /* Locate the main sequence */ |
| 1649 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); |
| 1650 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); |
| 1651 | main_e = main_e >> sb->s_blocksize_bits; |
| 1652 | main_e += main_s; |
| 1653 | |
| 1654 | /* Locate the reserve sequence */ |
| 1655 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); |
| 1656 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); |
| 1657 | reserve_e = reserve_e >> sb->s_blocksize_bits; |
| 1658 | reserve_e += reserve_s; |
| 1659 | |
| 1660 | /* Process the main & reserve sequences */ |
| 1661 | /* responsible for finding the PartitionDesc(s) */ |
| 1662 | if (!udf_process_sequence(sb, main_s, main_e, fileset)) |
| 1663 | return 1; |
Jan Kara | bff943a | 2012-06-27 22:27:05 +0200 | [diff] [blame] | 1664 | udf_sb_free_partitions(sb); |
| 1665 | if (!udf_process_sequence(sb, reserve_s, reserve_e, fileset)) |
| 1666 | return 1; |
| 1667 | udf_sb_free_partitions(sb); |
| 1668 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1669 | } |
| 1670 | |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1671 | /* |
| 1672 | * Check whether there is an anchor block in the given block and |
| 1673 | * load Volume Descriptor Sequence if so. |
| 1674 | */ |
| 1675 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, |
| 1676 | struct kernel_lb_addr *fileset) |
| 1677 | { |
| 1678 | struct buffer_head *bh; |
| 1679 | uint16_t ident; |
| 1680 | int ret; |
| 1681 | |
| 1682 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
| 1683 | udf_fixed_to_variable(block) >= |
| 1684 | sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) |
| 1685 | return 0; |
| 1686 | |
| 1687 | bh = udf_read_tagged(sb, block, block, &ident); |
| 1688 | if (!bh) |
| 1689 | return 0; |
| 1690 | if (ident != TAG_IDENT_AVDP) { |
| 1691 | brelse(bh); |
| 1692 | return 0; |
| 1693 | } |
| 1694 | ret = udf_load_sequence(sb, bh, fileset); |
| 1695 | brelse(bh); |
| 1696 | return ret; |
| 1697 | } |
| 1698 | |
| 1699 | /* Search for an anchor volume descriptor pointer */ |
| 1700 | static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock, |
| 1701 | struct kernel_lb_addr *fileset) |
| 1702 | { |
| 1703 | sector_t last[6]; |
| 1704 | int i; |
| 1705 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1706 | int last_count = 0; |
| 1707 | |
| 1708 | /* First try user provided anchor */ |
| 1709 | if (sbi->s_anchor) { |
| 1710 | if (udf_check_anchor_block(sb, sbi->s_anchor, fileset)) |
| 1711 | return lastblock; |
| 1712 | } |
| 1713 | /* |
| 1714 | * according to spec, anchor is in either: |
| 1715 | * block 256 |
| 1716 | * lastblock-256 |
| 1717 | * lastblock |
| 1718 | * however, if the disc isn't closed, it could be 512. |
| 1719 | */ |
| 1720 | if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset)) |
| 1721 | return lastblock; |
| 1722 | /* |
| 1723 | * The trouble is which block is the last one. Drives often misreport |
| 1724 | * this so we try various possibilities. |
| 1725 | */ |
| 1726 | last[last_count++] = lastblock; |
| 1727 | if (lastblock >= 1) |
| 1728 | last[last_count++] = lastblock - 1; |
| 1729 | last[last_count++] = lastblock + 1; |
| 1730 | if (lastblock >= 2) |
| 1731 | last[last_count++] = lastblock - 2; |
| 1732 | if (lastblock >= 150) |
| 1733 | last[last_count++] = lastblock - 150; |
| 1734 | if (lastblock >= 152) |
| 1735 | last[last_count++] = lastblock - 152; |
| 1736 | |
| 1737 | for (i = 0; i < last_count; i++) { |
| 1738 | if (last[i] >= sb->s_bdev->bd_inode->i_size >> |
| 1739 | sb->s_blocksize_bits) |
| 1740 | continue; |
| 1741 | if (udf_check_anchor_block(sb, last[i], fileset)) |
| 1742 | return last[i]; |
| 1743 | if (last[i] < 256) |
| 1744 | continue; |
| 1745 | if (udf_check_anchor_block(sb, last[i] - 256, fileset)) |
| 1746 | return last[i]; |
| 1747 | } |
| 1748 | |
| 1749 | /* Finally try block 512 in case media is open */ |
| 1750 | if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset)) |
| 1751 | return last[0]; |
| 1752 | return 0; |
| 1753 | } |
| 1754 | |
| 1755 | /* |
| 1756 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from |
| 1757 | * area specified by it. The function expects sbi->s_lastblock to be the last |
| 1758 | * block on the media. |
| 1759 | * |
| 1760 | * Return 1 if ok, 0 if not found. |
| 1761 | * |
| 1762 | */ |
| 1763 | static int udf_find_anchor(struct super_block *sb, |
| 1764 | struct kernel_lb_addr *fileset) |
| 1765 | { |
| 1766 | sector_t lastblock; |
| 1767 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1768 | |
| 1769 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); |
| 1770 | if (lastblock) |
| 1771 | goto out; |
| 1772 | |
| 1773 | /* No anchor found? Try VARCONV conversion of block numbers */ |
| 1774 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); |
| 1775 | /* Firstly, we try to not convert number of the last block */ |
| 1776 | lastblock = udf_scan_anchors(sb, |
| 1777 | udf_variable_to_fixed(sbi->s_last_block), |
| 1778 | fileset); |
| 1779 | if (lastblock) |
| 1780 | goto out; |
| 1781 | |
| 1782 | /* Secondly, we try with converted number of the last block */ |
| 1783 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); |
| 1784 | if (!lastblock) { |
| 1785 | /* VARCONV didn't help. Clear it. */ |
| 1786 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); |
| 1787 | return 0; |
| 1788 | } |
| 1789 | out: |
| 1790 | sbi->s_last_block = lastblock; |
| 1791 | return 1; |
| 1792 | } |
| 1793 | |
| 1794 | /* |
| 1795 | * Check Volume Structure Descriptor, find Anchor block and load Volume |
| 1796 | * Descriptor Sequence |
| 1797 | */ |
| 1798 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, |
| 1799 | int silent, struct kernel_lb_addr *fileset) |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 1800 | { |
| 1801 | struct udf_sb_info *sbi = UDF_SB(sb); |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1802 | loff_t nsr_off; |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 1803 | |
| 1804 | if (!sb_set_blocksize(sb, uopt->blocksize)) { |
| 1805 | if (!silent) |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1806 | udf_warn(sb, "Bad block size\n"); |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 1807 | return 0; |
| 1808 | } |
| 1809 | sbi->s_last_block = uopt->lastblock; |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1810 | if (!uopt->novrs) { |
| 1811 | /* Check that it is NSR02 compliant */ |
| 1812 | nsr_off = udf_check_vsd(sb); |
| 1813 | if (!nsr_off) { |
| 1814 | if (!silent) |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1815 | udf_warn(sb, "No VRS found\n"); |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1816 | return 0; |
| 1817 | } |
| 1818 | if (nsr_off == -1) |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1819 | udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n"); |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1820 | if (!sbi->s_last_block) |
| 1821 | sbi->s_last_block = udf_get_last_block(sb); |
| 1822 | } else { |
| 1823 | udf_debug("Validity check skipped because of novrs option\n"); |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 1824 | } |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1825 | |
| 1826 | /* Look for anchor block and load Volume Descriptor Sequence */ |
| 1827 | sbi->s_anchor = uopt->anchor; |
| 1828 | if (!udf_find_anchor(sb, fileset)) { |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 1829 | if (!silent) |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1830 | udf_warn(sb, "No anchor found\n"); |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 1831 | return 0; |
| 1832 | } |
| 1833 | return 1; |
| 1834 | } |
| 1835 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1836 | static void udf_open_lvid(struct super_block *sb) |
| 1837 | { |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1838 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1839 | struct buffer_head *bh = sbi->s_lvid_bh; |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1840 | struct logicalVolIntegrityDesc *lvid; |
| 1841 | struct logicalVolIntegrityDescImpUse *lvidiu; |
Jan Kara | 146bca7 | 2009-03-16 18:27:37 +0100 | [diff] [blame] | 1842 | |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1843 | if (!bh) |
| 1844 | return; |
Jan Kara | 949f4a7 | 2010-10-20 18:49:20 +0200 | [diff] [blame] | 1845 | |
| 1846 | mutex_lock(&sbi->s_alloc_mutex); |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1847 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
| 1848 | lvidiu = udf_sb_lvidiu(sbi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1849 | |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1850 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
| 1851 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; |
| 1852 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, |
| 1853 | CURRENT_TIME); |
Jan Kara | 146bca7 | 2009-03-16 18:27:37 +0100 | [diff] [blame] | 1854 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1855 | |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1856 | lvid->descTag.descCRC = cpu_to_le16( |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1857 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 1858 | le16_to_cpu(lvid->descTag.descCRCLength))); |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1859 | |
| 1860 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); |
| 1861 | mark_buffer_dirty(bh); |
Jan Kara | 146bca7 | 2009-03-16 18:27:37 +0100 | [diff] [blame] | 1862 | sbi->s_lvid_dirty = 0; |
Jan Kara | 949f4a7 | 2010-10-20 18:49:20 +0200 | [diff] [blame] | 1863 | mutex_unlock(&sbi->s_alloc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | } |
| 1865 | |
| 1866 | static void udf_close_lvid(struct super_block *sb) |
| 1867 | { |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1868 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1869 | struct buffer_head *bh = sbi->s_lvid_bh; |
| 1870 | struct logicalVolIntegrityDesc *lvid; |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1871 | struct logicalVolIntegrityDescImpUse *lvidiu; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1872 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1873 | if (!bh) |
| 1874 | return; |
| 1875 | |
Jan Kara | 949f4a7 | 2010-10-20 18:49:20 +0200 | [diff] [blame] | 1876 | mutex_lock(&sbi->s_alloc_mutex); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1877 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1878 | lvidiu = udf_sb_lvidiu(sbi); |
| 1879 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
| 1880 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; |
| 1881 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); |
| 1882 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) |
| 1883 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); |
| 1884 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) |
| 1885 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); |
| 1886 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) |
| 1887 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); |
| 1888 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1890 | lvid->descTag.descCRC = cpu_to_le16( |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1891 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 1892 | le16_to_cpu(lvid->descTag.descCRCLength))); |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1893 | |
| 1894 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); |
Jan Kara | 853a0c2 | 2011-12-23 11:53:07 +0100 | [diff] [blame] | 1895 | /* |
| 1896 | * We set buffer uptodate unconditionally here to avoid spurious |
| 1897 | * warnings from mark_buffer_dirty() when previous EIO has marked |
| 1898 | * the buffer as !uptodate |
| 1899 | */ |
| 1900 | set_buffer_uptodate(bh); |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1901 | mark_buffer_dirty(bh); |
Jan Kara | 146bca7 | 2009-03-16 18:27:37 +0100 | [diff] [blame] | 1902 | sbi->s_lvid_dirty = 0; |
Jan Kara | 949f4a7 | 2010-10-20 18:49:20 +0200 | [diff] [blame] | 1903 | mutex_unlock(&sbi->s_alloc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | } |
| 1905 | |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 1906 | u64 lvid_get_unique_id(struct super_block *sb) |
| 1907 | { |
| 1908 | struct buffer_head *bh; |
| 1909 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1910 | struct logicalVolIntegrityDesc *lvid; |
| 1911 | struct logicalVolHeaderDesc *lvhd; |
| 1912 | u64 uniqueID; |
| 1913 | u64 ret; |
| 1914 | |
| 1915 | bh = sbi->s_lvid_bh; |
| 1916 | if (!bh) |
| 1917 | return 0; |
| 1918 | |
| 1919 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
| 1920 | lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; |
| 1921 | |
| 1922 | mutex_lock(&sbi->s_alloc_mutex); |
| 1923 | ret = uniqueID = le64_to_cpu(lvhd->uniqueID); |
| 1924 | if (!(++uniqueID & 0xFFFFFFFF)) |
| 1925 | uniqueID += 16; |
| 1926 | lvhd->uniqueID = cpu_to_le64(uniqueID); |
| 1927 | mutex_unlock(&sbi->s_alloc_mutex); |
| 1928 | mark_buffer_dirty(bh); |
| 1929 | |
| 1930 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1931 | } |
| 1932 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
| 1934 | { |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1935 | int ret; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1936 | struct inode *inode = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1937 | struct udf_options uopt; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1938 | struct kernel_lb_addr rootdir, fileset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1939 | struct udf_sb_info *sbi; |
| 1940 | |
| 1941 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); |
| 1942 | uopt.uid = -1; |
| 1943 | uopt.gid = -1; |
| 1944 | uopt.umask = 0; |
Marcin Slusarz | 87bc730 | 2008-12-02 13:40:11 +0100 | [diff] [blame] | 1945 | uopt.fmode = UDF_INVALID_MODE; |
| 1946 | uopt.dmode = UDF_INVALID_MODE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1948 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
Alessio Igor Bogani | 9db9f9e | 2010-11-16 18:40:49 +0100 | [diff] [blame] | 1949 | if (!sbi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | return -ENOMEM; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1951 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | sb->s_fs_info = sbi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | |
Ingo Molnar | 1e7933d | 2006-03-23 03:00:44 -0800 | [diff] [blame] | 1954 | mutex_init(&sbi->s_alloc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1955 | |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 1956 | if (!udf_parse_options((char *)options, &uopt, false)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | goto error_out; |
| 1958 | |
| 1959 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1960 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
Joe Perches | 8076c36 | 2011-10-10 01:08:03 -0700 | [diff] [blame] | 1961 | udf_err(sb, "utf8 cannot be combined with iocharset\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1962 | goto error_out; |
| 1963 | } |
| 1964 | #ifdef CONFIG_UDF_NLS |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1965 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1966 | uopt.nls_map = load_nls_default(); |
| 1967 | if (!uopt.nls_map) |
| 1968 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); |
| 1969 | else |
| 1970 | udf_debug("Using default NLS map\n"); |
| 1971 | } |
| 1972 | #endif |
| 1973 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) |
| 1974 | uopt.flags |= (1 << UDF_FLAG_UTF8); |
| 1975 | |
| 1976 | fileset.logicalBlockNum = 0xFFFFFFFF; |
| 1977 | fileset.partitionReferenceNum = 0xFFFF; |
| 1978 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1979 | sbi->s_flags = uopt.flags; |
| 1980 | sbi->s_uid = uopt.uid; |
| 1981 | sbi->s_gid = uopt.gid; |
| 1982 | sbi->s_umask = uopt.umask; |
Marcin Slusarz | 7ac9bcd5 | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 1983 | sbi->s_fmode = uopt.fmode; |
| 1984 | sbi->s_dmode = uopt.dmode; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1985 | sbi->s_nls_map = uopt.nls_map; |
Jan Kara | c03cad2 | 2010-10-20 22:17:28 +0200 | [diff] [blame] | 1986 | rwlock_init(&sbi->s_cred_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1988 | if (uopt.session == 0xFFFFFFFF) |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1989 | sbi->s_session = udf_get_last_session(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1990 | else |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1991 | sbi->s_session = uopt.session; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1993 | udf_debug("Multi-session=%d\n", sbi->s_session); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1995 | /* Fill in the rest of the superblock */ |
| 1996 | sb->s_op = &udf_sb_ops; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1997 | sb->s_export_op = &udf_export_ops; |
Christoph Hellwig | 123e9ca | 2010-05-19 07:16:44 -0400 | [diff] [blame] | 1998 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1999 | sb->s_magic = UDF_SUPER_MAGIC; |
| 2000 | sb->s_time_gran = 1000; |
| 2001 | |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 2002 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { |
| 2003 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
| 2004 | } else { |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 2005 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 2006 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
| 2007 | if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { |
| 2008 | if (!silent) |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2009 | pr_notice("Rescanning with blocksize %d\n", |
| 2010 | UDF_DEFAULT_BLOCKSIZE); |
Ashish Sangwan | dc141a4 | 2012-07-21 16:35:17 +0530 | [diff] [blame] | 2011 | brelse(sbi->s_lvid_bh); |
| 2012 | sbi->s_lvid_bh = NULL; |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 2013 | uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; |
| 2014 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
| 2015 | } |
| 2016 | } |
| 2017 | if (!ret) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2018 | udf_warn(sb, "No partition found (1)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2019 | goto error_out; |
| 2020 | } |
| 2021 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2022 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2024 | if (sbi->s_lvid_bh) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2025 | struct logicalVolIntegrityDescImpUse *lvidiu = |
| 2026 | udf_sb_lvidiu(sbi); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2027 | uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); |
| 2028 | uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2029 | /* uint16_t maxUDFWriteRev = |
| 2030 | le16_to_cpu(lvidiu->maxUDFWriteRev); */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2031 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2032 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2033 | udf_err(sb, "minUDFReadRev=%x (max is %x)\n", |
| 2034 | le16_to_cpu(lvidiu->minUDFReadRev), |
| 2035 | UDF_MAX_READ_VERSION); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | goto error_out; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2037 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2038 | sb->s_flags |= MS_RDONLY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2039 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2040 | sbi->s_udfrev = minUDFWriteRev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2041 | |
| 2042 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) |
| 2043 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); |
| 2044 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) |
| 2045 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); |
| 2046 | } |
| 2047 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2048 | if (!sbi->s_partitions) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2049 | udf_warn(sb, "No partition found (2)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2050 | goto error_out; |
| 2051 | } |
| 2052 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2053 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
| 2054 | UDF_PART_FLAG_READ_ONLY) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2055 | pr_notice("Partition marked readonly; forcing readonly mount\n"); |
Eric Sandeen | 39b3f6d | 2006-09-29 01:59:41 -0700 | [diff] [blame] | 2056 | sb->s_flags |= MS_RDONLY; |
Peter Osterlund | c1a26e7 | 2006-10-05 21:17:50 +0200 | [diff] [blame] | 2057 | } |
Eric Sandeen | 39b3f6d | 2006-09-29 01:59:41 -0700 | [diff] [blame] | 2058 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2059 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2060 | udf_warn(sb, "No fileset found\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2061 | goto error_out; |
| 2062 | } |
| 2063 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2064 | if (!silent) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 2065 | struct timestamp ts; |
Marcin Slusarz | 5677480 | 2008-02-10 11:25:31 +0100 | [diff] [blame] | 2066 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2067 | udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
| 2068 | sbi->s_volume_ident, |
| 2069 | le16_to_cpu(ts.year), ts.month, ts.day, |
Marcin Slusarz | 5677480 | 2008-02-10 11:25:31 +0100 | [diff] [blame] | 2070 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2071 | } |
| 2072 | if (!(sb->s_flags & MS_RDONLY)) |
| 2073 | udf_open_lvid(sb); |
| 2074 | |
| 2075 | /* Assign the root inode */ |
| 2076 | /* assign inodes by physical block number */ |
| 2077 | /* perhaps it's not extensible enough, but for now ... */ |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 2078 | inode = udf_iget(sb, &rootdir); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2079 | if (!inode) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2080 | udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n", |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2081 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2082 | goto error_out; |
| 2083 | } |
| 2084 | |
| 2085 | /* Allocate a dentry for the root inode */ |
Al Viro | 48fde70 | 2012-01-08 22:15:13 -0500 | [diff] [blame] | 2086 | sb->s_root = d_make_root(inode); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2087 | if (!sb->s_root) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2088 | udf_err(sb, "Couldn't allocate root dentry\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2089 | goto error_out; |
| 2090 | } |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 2091 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
Al Viro | 8de5277 | 2012-02-06 12:45:27 -0500 | [diff] [blame] | 2092 | sb->s_max_links = UDF_MAX_LINKS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2093 | return 0; |
| 2094 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2095 | error_out: |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2096 | if (sbi->s_vat_inode) |
| 2097 | iput(sbi->s_vat_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | #ifdef CONFIG_UDF_NLS |
| 2099 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2100 | unload_nls(sbi->s_nls_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2101 | #endif |
| 2102 | if (!(sb->s_flags & MS_RDONLY)) |
| 2103 | udf_close_lvid(sb); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2104 | brelse(sbi->s_lvid_bh); |
Jan Kara | bff943a | 2012-06-27 22:27:05 +0200 | [diff] [blame] | 2105 | udf_sb_free_partitions(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2106 | kfree(sbi); |
| 2107 | sb->s_fs_info = NULL; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | return -EINVAL; |
| 2110 | } |
| 2111 | |
Joe Perches | 8076c36 | 2011-10-10 01:08:03 -0700 | [diff] [blame] | 2112 | void _udf_err(struct super_block *sb, const char *function, |
| 2113 | const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2114 | { |
Joe Perches | c2bff36 | 2011-10-10 01:08:06 -0700 | [diff] [blame] | 2115 | struct va_format vaf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2116 | va_list args; |
| 2117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2118 | va_start(args, fmt); |
Joe Perches | c2bff36 | 2011-10-10 01:08:06 -0700 | [diff] [blame] | 2119 | |
| 2120 | vaf.fmt = fmt; |
| 2121 | vaf.va = &args; |
| 2122 | |
| 2123 | pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); |
| 2124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2125 | va_end(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2126 | } |
| 2127 | |
Joe Perches | a40ecd7 | 2011-10-10 01:08:04 -0700 | [diff] [blame] | 2128 | void _udf_warn(struct super_block *sb, const char *function, |
| 2129 | const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | { |
Joe Perches | c2bff36 | 2011-10-10 01:08:06 -0700 | [diff] [blame] | 2131 | struct va_format vaf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2132 | va_list args; |
| 2133 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2134 | va_start(args, fmt); |
Joe Perches | c2bff36 | 2011-10-10 01:08:06 -0700 | [diff] [blame] | 2135 | |
| 2136 | vaf.fmt = fmt; |
| 2137 | vaf.va = &args; |
| 2138 | |
| 2139 | pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); |
| 2140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2141 | va_end(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | } |
| 2143 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2144 | static void udf_put_super(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2145 | { |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2146 | struct udf_sb_info *sbi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2148 | sbi = UDF_SB(sb); |
Christoph Hellwig | 6cfd014 | 2009-05-05 15:40:36 +0200 | [diff] [blame] | 2149 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2150 | if (sbi->s_vat_inode) |
| 2151 | iput(sbi->s_vat_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2152 | #ifdef CONFIG_UDF_NLS |
| 2153 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2154 | unload_nls(sbi->s_nls_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | #endif |
| 2156 | if (!(sb->s_flags & MS_RDONLY)) |
| 2157 | udf_close_lvid(sb); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2158 | brelse(sbi->s_lvid_bh); |
Jan Kara | bff943a | 2012-06-27 22:27:05 +0200 | [diff] [blame] | 2159 | udf_sb_free_partitions(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2160 | kfree(sb->s_fs_info); |
| 2161 | sb->s_fs_info = NULL; |
| 2162 | } |
| 2163 | |
Jan Kara | 146bca7 | 2009-03-16 18:27:37 +0100 | [diff] [blame] | 2164 | static int udf_sync_fs(struct super_block *sb, int wait) |
| 2165 | { |
| 2166 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 2167 | |
| 2168 | mutex_lock(&sbi->s_alloc_mutex); |
| 2169 | if (sbi->s_lvid_dirty) { |
| 2170 | /* |
| 2171 | * Blockdevice will be synced later so we don't have to submit |
| 2172 | * the buffer for IO |
| 2173 | */ |
| 2174 | mark_buffer_dirty(sbi->s_lvid_bh); |
Jan Kara | 146bca7 | 2009-03-16 18:27:37 +0100 | [diff] [blame] | 2175 | sbi->s_lvid_dirty = 0; |
| 2176 | } |
| 2177 | mutex_unlock(&sbi->s_alloc_mutex); |
| 2178 | |
| 2179 | return 0; |
| 2180 | } |
| 2181 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2182 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2183 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 2184 | struct super_block *sb = dentry->d_sb; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2185 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 2186 | struct logicalVolIntegrityDescImpUse *lvidiu; |
Coly Li | 557f5a1 | 2009-01-20 01:36:55 +0800 | [diff] [blame] | 2187 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2188 | |
| 2189 | if (sbi->s_lvid_bh != NULL) |
| 2190 | lvidiu = udf_sb_lvidiu(sbi); |
| 2191 | else |
| 2192 | lvidiu = NULL; |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 2193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2194 | buf->f_type = UDF_SUPER_MAGIC; |
| 2195 | buf->f_bsize = sb->s_blocksize; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2196 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2197 | buf->f_bfree = udf_count_free(sb); |
| 2198 | buf->f_bavail = buf->f_bfree; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2199 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
| 2200 | le32_to_cpu(lvidiu->numDirs)) : 0) |
| 2201 | + buf->f_bfree; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2202 | buf->f_ffree = buf->f_bfree; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2203 | buf->f_namelen = UDF_NAME_LEN - 2; |
Coly Li | 557f5a1 | 2009-01-20 01:36:55 +0800 | [diff] [blame] | 2204 | buf->f_fsid.val[0] = (u32)id; |
| 2205 | buf->f_fsid.val[1] = (u32)(id >> 32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2206 | |
| 2207 | return 0; |
| 2208 | } |
| 2209 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2210 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
| 2211 | struct udf_bitmap *bitmap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2212 | { |
| 2213 | struct buffer_head *bh = NULL; |
| 2214 | unsigned int accum = 0; |
| 2215 | int index; |
| 2216 | int block = 0, newblock; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 2217 | struct kernel_lb_addr loc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2218 | uint32_t bytes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2219 | uint8_t *ptr; |
| 2220 | uint16_t ident; |
| 2221 | struct spaceBitmapDesc *bm; |
| 2222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | loc.logicalBlockNum = bitmap->s_extPosition; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2224 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 2225 | bh = udf_read_ptagged(sb, &loc, 0, &ident); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2227 | if (!bh) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2228 | udf_err(sb, "udf_count_free failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2229 | goto out; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2230 | } else if (ident != TAG_IDENT_SBD) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2231 | brelse(bh); |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2232 | udf_err(sb, "udf_count_free failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2233 | goto out; |
| 2234 | } |
| 2235 | |
| 2236 | bm = (struct spaceBitmapDesc *)bh->b_data; |
| 2237 | bytes = le32_to_cpu(bm->numOfBytes); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2238 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
| 2239 | ptr = (uint8_t *)bh->b_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2240 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2241 | while (bytes > 0) { |
Marcin Slusarz | 01b954a | 2008-02-02 22:37:07 +0100 | [diff] [blame] | 2242 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
| 2243 | accum += bitmap_weight((const unsigned long *)(ptr + index), |
| 2244 | cur_bytes * 8); |
| 2245 | bytes -= cur_bytes; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2246 | if (bytes) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2247 | brelse(bh); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 2248 | newblock = udf_get_lb_pblock(sb, &loc, ++block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2249 | bh = udf_tread(sb, newblock); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2250 | if (!bh) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | udf_debug("read failed\n"); |
| 2252 | goto out; |
| 2253 | } |
| 2254 | index = 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2255 | ptr = (uint8_t *)bh->b_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | } |
| 2257 | } |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2258 | brelse(bh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2259 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2260 | return accum; |
| 2261 | } |
| 2262 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2263 | static unsigned int udf_count_free_table(struct super_block *sb, |
| 2264 | struct inode *table) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2265 | { |
| 2266 | unsigned int accum = 0; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2267 | uint32_t elen; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 2268 | struct kernel_lb_addr eloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | int8_t etype; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2270 | struct extent_position epos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2271 | |
Jan Kara | d1668fe | 2010-10-20 23:24:12 +0200 | [diff] [blame] | 2272 | mutex_lock(&UDF_SB(sb)->s_alloc_mutex); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 2273 | epos.block = UDF_I(table)->i_location; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2274 | epos.offset = sizeof(struct unallocSpaceEntry); |
| 2275 | epos.bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2276 | |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 2277 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | accum += (elen >> table->i_sb->s_blocksize_bits); |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 2279 | |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2280 | brelse(epos.bh); |
Jan Kara | d1668fe | 2010-10-20 23:24:12 +0200 | [diff] [blame] | 2281 | mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2282 | |
| 2283 | return accum; |
| 2284 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2285 | |
| 2286 | static unsigned int udf_count_free(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2287 | { |
| 2288 | unsigned int accum = 0; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2289 | struct udf_sb_info *sbi; |
| 2290 | struct udf_part_map *map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2291 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2292 | sbi = UDF_SB(sb); |
| 2293 | if (sbi->s_lvid_bh) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2294 | struct logicalVolIntegrityDesc *lvid = |
| 2295 | (struct logicalVolIntegrityDesc *) |
| 2296 | sbi->s_lvid_bh->b_data; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2297 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2298 | accum = le32_to_cpu( |
| 2299 | lvid->freeSpaceTable[sbi->s_partition]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2300 | if (accum == 0xFFFFFFFF) |
| 2301 | accum = 0; |
| 2302 | } |
| 2303 | } |
| 2304 | |
| 2305 | if (accum) |
| 2306 | return accum; |
| 2307 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2308 | map = &sbi->s_partmaps[sbi->s_partition]; |
| 2309 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2310 | accum += udf_count_free_bitmap(sb, |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2311 | map->s_uspace.s_bitmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2312 | } |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2313 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2314 | accum += udf_count_free_bitmap(sb, |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2315 | map->s_fspace.s_bitmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2316 | } |
| 2317 | if (accum) |
| 2318 | return accum; |
| 2319 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2320 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2321 | accum += udf_count_free_table(sb, |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2322 | map->s_uspace.s_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | } |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2324 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2325 | accum += udf_count_free_table(sb, |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2326 | map->s_fspace.s_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2327 | } |
| 2328 | |
| 2329 | return accum; |
| 2330 | } |