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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #include <asm/byteorder.h> |
| 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include "udf_sb.h" |
| 62 | #include "udf_i.h" |
| 63 | |
| 64 | #include <linux/init.h> |
| 65 | #include <asm/uaccess.h> |
| 66 | |
| 67 | #define VDS_POS_PRIMARY_VOL_DESC 0 |
| 68 | #define VDS_POS_UNALLOC_SPACE_DESC 1 |
| 69 | #define VDS_POS_LOGICAL_VOL_DESC 2 |
| 70 | #define VDS_POS_PARTITION_DESC 3 |
| 71 | #define VDS_POS_IMP_USE_VOL_DESC 4 |
| 72 | #define VDS_POS_VOL_DESC_PTR 5 |
| 73 | #define VDS_POS_TERMINATING_DESC 6 |
| 74 | #define VDS_POS_LENGTH 7 |
| 75 | |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 76 | #define UDF_DEFAULT_BLOCKSIZE 2048 |
| 77 | |
Al Viro | 8de5277 | 2012-02-06 12:45:27 -0500 | [diff] [blame] | 78 | enum { UDF_MAX_LINKS = 0xffff }; |
| 79 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | /* These are the "meat" - everything else is stuffing */ |
| 81 | static int udf_fill_super(struct super_block *, void *, int); |
| 82 | static void udf_put_super(struct super_block *); |
Jan Kara | 146bca7 | 2009-03-16 18:27:37 +0100 | [diff] [blame] | 83 | static int udf_sync_fs(struct super_block *, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | static int udf_remount_fs(struct super_block *, int *, char *); |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 85 | static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad); |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 86 | static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *, |
| 87 | struct kernel_lb_addr *); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 88 | static void udf_load_fileset(struct super_block *, struct buffer_head *, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 89 | struct kernel_lb_addr *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | static void udf_open_lvid(struct super_block *); |
| 91 | static void udf_close_lvid(struct super_block *); |
| 92 | static unsigned int udf_count_free(struct super_block *); |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 93 | static int udf_statfs(struct dentry *, struct kstatfs *); |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 94 | static int udf_show_options(struct seq_file *, struct dentry *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 96 | struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) |
| 97 | { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 98 | struct logicalVolIntegrityDesc *lvid = |
| 99 | (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 100 | __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 101 | __u32 offset = number_of_partitions * 2 * |
| 102 | sizeof(uint32_t)/sizeof(uint8_t); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 103 | return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]); |
| 104 | } |
| 105 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | /* UDF filesystem type */ |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 107 | static struct dentry *udf_mount(struct file_system_type *fs_type, |
| 108 | int flags, const char *dev_name, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | { |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 110 | return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | static struct file_system_type udf_fstype = { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 114 | .owner = THIS_MODULE, |
| 115 | .name = "udf", |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 116 | .mount = udf_mount, |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 117 | .kill_sb = kill_block_super, |
| 118 | .fs_flags = FS_REQUIRES_DEV, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | }; |
| 120 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 121 | static struct kmem_cache *udf_inode_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
| 123 | static struct inode *udf_alloc_inode(struct super_block *sb) |
| 124 | { |
| 125 | struct udf_inode_info *ei; |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 126 | ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | if (!ei) |
| 128 | return NULL; |
Dan Bastone | 95f8797 | 2006-08-13 23:24:18 -0700 | [diff] [blame] | 129 | |
| 130 | ei->i_unique = 0; |
| 131 | ei->i_lenExtents = 0; |
| 132 | ei->i_next_alloc_block = 0; |
| 133 | ei->i_next_alloc_goal = 0; |
| 134 | ei->i_strat4096 = 0; |
Alessio Igor Bogani | 4d0fb62 | 2010-11-16 18:40:47 +0100 | [diff] [blame] | 135 | init_rwsem(&ei->i_data_sem); |
Dan Bastone | 95f8797 | 2006-08-13 23:24:18 -0700 | [diff] [blame] | 136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | return &ei->vfs_inode; |
| 138 | } |
| 139 | |
Nick Piggin | fa0d7e3 | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 140 | static void udf_i_callback(struct rcu_head *head) |
| 141 | { |
| 142 | struct inode *inode = container_of(head, struct inode, i_rcu); |
Nick Piggin | fa0d7e3 | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 143 | kmem_cache_free(udf_inode_cachep, UDF_I(inode)); |
| 144 | } |
| 145 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | static void udf_destroy_inode(struct inode *inode) |
| 147 | { |
Nick Piggin | fa0d7e3 | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 148 | call_rcu(&inode->i_rcu, udf_i_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | } |
| 150 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 151 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 153 | struct udf_inode_info *ei = (struct udf_inode_info *)foo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 155 | ei->i_ext.i_data = NULL; |
| 156 | inode_init_once(&ei->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | } |
| 158 | |
| 159 | static int init_inodecache(void) |
| 160 | { |
| 161 | udf_inode_cachep = kmem_cache_create("udf_inode_cache", |
| 162 | sizeof(struct udf_inode_info), |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 163 | 0, (SLAB_RECLAIM_ACCOUNT | |
| 164 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 165 | init_once); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 166 | if (!udf_inode_cachep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | return -ENOMEM; |
| 168 | return 0; |
| 169 | } |
| 170 | |
| 171 | static void destroy_inodecache(void) |
| 172 | { |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 173 | kmem_cache_destroy(udf_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | /* Superblock operations */ |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 177 | static const struct super_operations udf_sb_ops = { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 178 | .alloc_inode = udf_alloc_inode, |
| 179 | .destroy_inode = udf_destroy_inode, |
| 180 | .write_inode = udf_write_inode, |
Al Viro | 3aac2b6 | 2010-06-07 00:43:39 -0400 | [diff] [blame] | 181 | .evict_inode = udf_evict_inode, |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 182 | .put_super = udf_put_super, |
Jan Kara | 146bca7 | 2009-03-16 18:27:37 +0100 | [diff] [blame] | 183 | .sync_fs = udf_sync_fs, |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 184 | .statfs = udf_statfs, |
| 185 | .remount_fs = udf_remount_fs, |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 186 | .show_options = udf_show_options, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | }; |
| 188 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 189 | struct udf_options { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | unsigned char novrs; |
| 191 | unsigned int blocksize; |
| 192 | unsigned int session; |
| 193 | unsigned int lastblock; |
| 194 | unsigned int anchor; |
| 195 | unsigned int volume; |
| 196 | unsigned short partition; |
| 197 | unsigned int fileset; |
| 198 | unsigned int rootdir; |
| 199 | unsigned int flags; |
Al Viro | faa1729 | 2011-07-26 03:18:29 -0400 | [diff] [blame] | 200 | umode_t umask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | gid_t gid; |
| 202 | uid_t uid; |
Al Viro | faa1729 | 2011-07-26 03:18:29 -0400 | [diff] [blame] | 203 | umode_t fmode; |
| 204 | umode_t dmode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | struct nls_table *nls_map; |
| 206 | }; |
| 207 | |
| 208 | static int __init init_udf_fs(void) |
| 209 | { |
| 210 | int err; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 211 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | err = init_inodecache(); |
| 213 | if (err) |
| 214 | goto out1; |
| 215 | err = register_filesystem(&udf_fstype); |
| 216 | if (err) |
| 217 | goto out; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 218 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | return 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 220 | |
| 221 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | destroy_inodecache(); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 223 | |
| 224 | out1: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | return err; |
| 226 | } |
| 227 | |
| 228 | static void __exit exit_udf_fs(void) |
| 229 | { |
| 230 | unregister_filesystem(&udf_fstype); |
| 231 | destroy_inodecache(); |
| 232 | } |
| 233 | |
| 234 | module_init(init_udf_fs) |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 235 | module_exit(exit_udf_fs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | |
Marcin Slusarz | dc5d39b | 2008-02-08 04:20:32 -0800 | [diff] [blame] | 237 | static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count) |
| 238 | { |
| 239 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 240 | |
| 241 | sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map), |
| 242 | GFP_KERNEL); |
| 243 | if (!sbi->s_partmaps) { |
Joe Perches | 8076c36 | 2011-10-10 01:08:03 -0700 | [diff] [blame] | 244 | udf_err(sb, "Unable to allocate space for %d partition maps\n", |
| 245 | count); |
Marcin Slusarz | dc5d39b | 2008-02-08 04:20:32 -0800 | [diff] [blame] | 246 | sbi->s_partitions = 0; |
| 247 | return -ENOMEM; |
| 248 | } |
| 249 | |
| 250 | sbi->s_partitions = count; |
| 251 | return 0; |
| 252 | } |
| 253 | |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 254 | static int udf_show_options(struct seq_file *seq, struct dentry *root) |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 255 | { |
Al Viro | 34c80b1 | 2011-12-08 21:32:45 -0500 | [diff] [blame] | 256 | struct super_block *sb = root->d_sb; |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 257 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 258 | |
| 259 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) |
| 260 | seq_puts(seq, ",nostrict"); |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 261 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET)) |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 262 | seq_printf(seq, ",bs=%lu", sb->s_blocksize); |
| 263 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE)) |
| 264 | seq_puts(seq, ",unhide"); |
| 265 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE)) |
| 266 | seq_puts(seq, ",undelete"); |
| 267 | if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB)) |
| 268 | seq_puts(seq, ",noadinicb"); |
| 269 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD)) |
| 270 | seq_puts(seq, ",shortad"); |
| 271 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET)) |
| 272 | seq_puts(seq, ",uid=forget"); |
| 273 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE)) |
| 274 | seq_puts(seq, ",uid=ignore"); |
| 275 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET)) |
| 276 | seq_puts(seq, ",gid=forget"); |
| 277 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE)) |
| 278 | seq_puts(seq, ",gid=ignore"); |
| 279 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) |
| 280 | seq_printf(seq, ",uid=%u", sbi->s_uid); |
| 281 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) |
| 282 | seq_printf(seq, ",gid=%u", sbi->s_gid); |
| 283 | if (sbi->s_umask != 0) |
Al Viro | faa1729 | 2011-07-26 03:18:29 -0400 | [diff] [blame] | 284 | seq_printf(seq, ",umask=%ho", sbi->s_umask); |
Marcin Slusarz | 87bc730 | 2008-12-02 13:40:11 +0100 | [diff] [blame] | 285 | if (sbi->s_fmode != UDF_INVALID_MODE) |
Al Viro | faa1729 | 2011-07-26 03:18:29 -0400 | [diff] [blame] | 286 | seq_printf(seq, ",mode=%ho", sbi->s_fmode); |
Marcin Slusarz | 87bc730 | 2008-12-02 13:40:11 +0100 | [diff] [blame] | 287 | if (sbi->s_dmode != UDF_INVALID_MODE) |
Al Viro | faa1729 | 2011-07-26 03:18:29 -0400 | [diff] [blame] | 288 | seq_printf(seq, ",dmode=%ho", sbi->s_dmode); |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 289 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET)) |
| 290 | seq_printf(seq, ",session=%u", sbi->s_session); |
| 291 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET)) |
| 292 | seq_printf(seq, ",lastblock=%u", sbi->s_last_block); |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 293 | if (sbi->s_anchor != 0) |
| 294 | seq_printf(seq, ",anchor=%u", sbi->s_anchor); |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 295 | /* |
| 296 | * volume, partition, fileset and rootdir seem to be ignored |
| 297 | * currently |
| 298 | */ |
| 299 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) |
| 300 | seq_puts(seq, ",utf8"); |
| 301 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map) |
| 302 | seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset); |
| 303 | |
| 304 | return 0; |
| 305 | } |
| 306 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | /* |
| 308 | * udf_parse_options |
| 309 | * |
| 310 | * PURPOSE |
| 311 | * Parse mount options. |
| 312 | * |
| 313 | * DESCRIPTION |
| 314 | * The following mount options are supported: |
| 315 | * |
| 316 | * gid= Set the default group. |
| 317 | * umask= Set the default umask. |
Marcin Slusarz | 7ac9bcd | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 318 | * mode= Set the default file permissions. |
| 319 | * dmode= Set the default directory permissions. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | * uid= Set the default user. |
| 321 | * bs= Set the block size. |
| 322 | * unhide Show otherwise hidden files. |
| 323 | * undelete Show deleted files in lists. |
| 324 | * adinicb Embed data in the inode (default) |
| 325 | * noadinicb Don't embed data in the inode |
| 326 | * shortad Use short ad's |
| 327 | * longad Use long ad's (default) |
| 328 | * nostrict Unset strict conformance |
| 329 | * iocharset= Set the NLS character set |
| 330 | * |
| 331 | * The remaining are for debugging and disaster recovery: |
| 332 | * |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 333 | * novrs Skip volume sequence recognition |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | * |
| 335 | * The following expect a offset from 0. |
| 336 | * |
| 337 | * session= Set the CDROM session (default= last session) |
| 338 | * anchor= Override standard anchor location. (default= 256) |
| 339 | * volume= Override the VolumeDesc location. (unused) |
| 340 | * partition= Override the PartitionDesc location. (unused) |
| 341 | * lastblock= Set the last block of the filesystem/ |
| 342 | * |
| 343 | * The following expect a offset from the partition root. |
| 344 | * |
| 345 | * fileset= Override the fileset block location. (unused) |
| 346 | * rootdir= Override the root directory location. (unused) |
| 347 | * WARNING: overriding the rootdir to a non-directory may |
| 348 | * yield highly unpredictable results. |
| 349 | * |
| 350 | * PRE-CONDITIONS |
| 351 | * options Pointer to mount options string. |
| 352 | * uopts Pointer to mount options variable. |
| 353 | * |
| 354 | * POST-CONDITIONS |
| 355 | * <return> 1 Mount options parsed okay. |
| 356 | * <return> 0 Error parsing mount options. |
| 357 | * |
| 358 | * HISTORY |
| 359 | * July 1, 1997 - Andrew E. Mileski |
| 360 | * Written, tested, and released. |
| 361 | */ |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | enum { |
| 364 | Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete, |
| 365 | Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad, |
| 366 | Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock, |
| 367 | Opt_anchor, Opt_volume, Opt_partition, Opt_fileset, |
| 368 | Opt_rootdir, Opt_utf8, Opt_iocharset, |
Marcin Slusarz | 7ac9bcd | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 369 | Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore, |
| 370 | Opt_fmode, Opt_dmode |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | }; |
| 372 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 373 | static const match_table_t tokens = { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 374 | {Opt_novrs, "novrs"}, |
| 375 | {Opt_nostrict, "nostrict"}, |
| 376 | {Opt_bs, "bs=%u"}, |
| 377 | {Opt_unhide, "unhide"}, |
| 378 | {Opt_undelete, "undelete"}, |
| 379 | {Opt_noadinicb, "noadinicb"}, |
| 380 | {Opt_adinicb, "adinicb"}, |
| 381 | {Opt_shortad, "shortad"}, |
| 382 | {Opt_longad, "longad"}, |
| 383 | {Opt_uforget, "uid=forget"}, |
| 384 | {Opt_uignore, "uid=ignore"}, |
| 385 | {Opt_gforget, "gid=forget"}, |
| 386 | {Opt_gignore, "gid=ignore"}, |
| 387 | {Opt_gid, "gid=%u"}, |
| 388 | {Opt_uid, "uid=%u"}, |
| 389 | {Opt_umask, "umask=%o"}, |
| 390 | {Opt_session, "session=%u"}, |
| 391 | {Opt_lastblock, "lastblock=%u"}, |
| 392 | {Opt_anchor, "anchor=%u"}, |
| 393 | {Opt_volume, "volume=%u"}, |
| 394 | {Opt_partition, "partition=%u"}, |
| 395 | {Opt_fileset, "fileset=%u"}, |
| 396 | {Opt_rootdir, "rootdir=%u"}, |
| 397 | {Opt_utf8, "utf8"}, |
| 398 | {Opt_iocharset, "iocharset=%s"}, |
Marcin Slusarz | 7ac9bcd | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 399 | {Opt_fmode, "mode=%o"}, |
| 400 | {Opt_dmode, "dmode=%o"}, |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 401 | {Opt_err, NULL} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | }; |
| 403 | |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 404 | static int udf_parse_options(char *options, struct udf_options *uopt, |
| 405 | bool remount) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | { |
| 407 | char *p; |
| 408 | int option; |
| 409 | |
| 410 | uopt->novrs = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | uopt->partition = 0xFFFF; |
| 412 | uopt->session = 0xFFFFFFFF; |
| 413 | uopt->lastblock = 0; |
| 414 | uopt->anchor = 0; |
| 415 | uopt->volume = 0xFFFFFFFF; |
| 416 | uopt->rootdir = 0xFFFFFFFF; |
| 417 | uopt->fileset = 0xFFFFFFFF; |
| 418 | uopt->nls_map = NULL; |
| 419 | |
| 420 | if (!options) |
| 421 | return 1; |
| 422 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 423 | while ((p = strsep(&options, ",")) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | substring_t args[MAX_OPT_ARGS]; |
| 425 | int token; |
| 426 | if (!*p) |
| 427 | continue; |
| 428 | |
| 429 | token = match_token(p, tokens, args); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 430 | switch (token) { |
| 431 | case Opt_novrs: |
| 432 | uopt->novrs = 1; |
Clemens Ladisch | 4136801 | 2009-03-06 09:16:49 +0100 | [diff] [blame] | 433 | break; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 434 | case Opt_bs: |
| 435 | if (match_int(&args[0], &option)) |
| 436 | return 0; |
| 437 | uopt->blocksize = option; |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 438 | uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 439 | break; |
| 440 | case Opt_unhide: |
| 441 | uopt->flags |= (1 << UDF_FLAG_UNHIDE); |
| 442 | break; |
| 443 | case Opt_undelete: |
| 444 | uopt->flags |= (1 << UDF_FLAG_UNDELETE); |
| 445 | break; |
| 446 | case Opt_noadinicb: |
| 447 | uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB); |
| 448 | break; |
| 449 | case Opt_adinicb: |
| 450 | uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB); |
| 451 | break; |
| 452 | case Opt_shortad: |
| 453 | uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD); |
| 454 | break; |
| 455 | case Opt_longad: |
| 456 | uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD); |
| 457 | break; |
| 458 | case Opt_gid: |
| 459 | if (match_int(args, &option)) |
| 460 | return 0; |
| 461 | uopt->gid = option; |
Cyrill Gorcunov | ca76d2d | 2007-07-31 00:39:40 -0700 | [diff] [blame] | 462 | uopt->flags |= (1 << UDF_FLAG_GID_SET); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 463 | break; |
| 464 | case Opt_uid: |
| 465 | if (match_int(args, &option)) |
| 466 | return 0; |
| 467 | uopt->uid = option; |
Cyrill Gorcunov | ca76d2d | 2007-07-31 00:39:40 -0700 | [diff] [blame] | 468 | uopt->flags |= (1 << UDF_FLAG_UID_SET); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 469 | break; |
| 470 | case Opt_umask: |
| 471 | if (match_octal(args, &option)) |
| 472 | return 0; |
| 473 | uopt->umask = option; |
| 474 | break; |
| 475 | case Opt_nostrict: |
| 476 | uopt->flags &= ~(1 << UDF_FLAG_STRICT); |
| 477 | break; |
| 478 | case Opt_session: |
| 479 | if (match_int(args, &option)) |
| 480 | return 0; |
| 481 | uopt->session = option; |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 482 | if (!remount) |
| 483 | uopt->flags |= (1 << UDF_FLAG_SESSION_SET); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 484 | break; |
| 485 | case Opt_lastblock: |
| 486 | if (match_int(args, &option)) |
| 487 | return 0; |
| 488 | uopt->lastblock = option; |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 489 | if (!remount) |
| 490 | uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 491 | break; |
| 492 | case Opt_anchor: |
| 493 | if (match_int(args, &option)) |
| 494 | return 0; |
| 495 | uopt->anchor = option; |
| 496 | break; |
| 497 | case Opt_volume: |
| 498 | if (match_int(args, &option)) |
| 499 | return 0; |
| 500 | uopt->volume = option; |
| 501 | break; |
| 502 | case Opt_partition: |
| 503 | if (match_int(args, &option)) |
| 504 | return 0; |
| 505 | uopt->partition = option; |
| 506 | break; |
| 507 | case Opt_fileset: |
| 508 | if (match_int(args, &option)) |
| 509 | return 0; |
| 510 | uopt->fileset = option; |
| 511 | break; |
| 512 | case Opt_rootdir: |
| 513 | if (match_int(args, &option)) |
| 514 | return 0; |
| 515 | uopt->rootdir = option; |
| 516 | break; |
| 517 | case Opt_utf8: |
| 518 | uopt->flags |= (1 << UDF_FLAG_UTF8); |
| 519 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | #ifdef CONFIG_UDF_NLS |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 521 | case Opt_iocharset: |
| 522 | uopt->nls_map = load_nls(args[0].from); |
| 523 | uopt->flags |= (1 << UDF_FLAG_NLS_MAP); |
| 524 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | #endif |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 526 | case Opt_uignore: |
| 527 | uopt->flags |= (1 << UDF_FLAG_UID_IGNORE); |
| 528 | break; |
| 529 | case Opt_uforget: |
| 530 | uopt->flags |= (1 << UDF_FLAG_UID_FORGET); |
| 531 | break; |
| 532 | case Opt_gignore: |
| 533 | uopt->flags |= (1 << UDF_FLAG_GID_IGNORE); |
| 534 | break; |
| 535 | case Opt_gforget: |
| 536 | uopt->flags |= (1 << UDF_FLAG_GID_FORGET); |
| 537 | break; |
Marcin Slusarz | 7ac9bcd | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 538 | case Opt_fmode: |
| 539 | if (match_octal(args, &option)) |
| 540 | return 0; |
| 541 | uopt->fmode = option & 0777; |
| 542 | break; |
| 543 | case Opt_dmode: |
| 544 | if (match_octal(args, &option)) |
| 545 | return 0; |
| 546 | uopt->dmode = option & 0777; |
| 547 | break; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 548 | default: |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 549 | pr_err("bad mount option \"%s\" or missing value\n", p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | return 0; |
| 551 | } |
| 552 | } |
| 553 | return 1; |
| 554 | } |
| 555 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 556 | 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] | 557 | { |
| 558 | struct udf_options uopt; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 559 | struct udf_sb_info *sbi = UDF_SB(sb); |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 560 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 562 | uopt.flags = sbi->s_flags; |
| 563 | uopt.uid = sbi->s_uid; |
| 564 | uopt.gid = sbi->s_gid; |
| 565 | uopt.umask = sbi->s_umask; |
Marcin Slusarz | 7ac9bcd | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 566 | uopt.fmode = sbi->s_fmode; |
| 567 | uopt.dmode = sbi->s_dmode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 569 | if (!udf_parse_options(options, &uopt, true)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | return -EINVAL; |
| 571 | |
Jan Kara | c03cad2 | 2010-10-20 22:17:28 +0200 | [diff] [blame] | 572 | write_lock(&sbi->s_cred_lock); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 573 | sbi->s_flags = uopt.flags; |
| 574 | sbi->s_uid = uopt.uid; |
| 575 | sbi->s_gid = uopt.gid; |
| 576 | sbi->s_umask = uopt.umask; |
Marcin Slusarz | 7ac9bcd | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 577 | sbi->s_fmode = uopt.fmode; |
| 578 | sbi->s_dmode = uopt.dmode; |
Jan Kara | c03cad2 | 2010-10-20 22:17:28 +0200 | [diff] [blame] | 579 | write_unlock(&sbi->s_cred_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 581 | if (sbi->s_lvid_bh) { |
| 582 | int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | if (write_rev > UDF_MAX_WRITE_VERSION) |
| 584 | *flags |= MS_RDONLY; |
| 585 | } |
| 586 | |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 587 | if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) |
| 588 | goto out_unlock; |
| 589 | |
Jan Kara | 3635046 | 2010-05-19 16:28:56 +0200 | [diff] [blame] | 590 | if (*flags & MS_RDONLY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | udf_close_lvid(sb); |
Jan Kara | 3635046 | 2010-05-19 16:28:56 +0200 | [diff] [blame] | 592 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | udf_open_lvid(sb); |
| 594 | |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 595 | out_unlock: |
Christoph Hellwig | c79d967 | 2010-05-19 07:16:40 -0400 | [diff] [blame] | 596 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | } |
| 598 | |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 599 | /* Check Volume Structure Descriptors (ECMA 167 2/9.1) */ |
| 600 | /* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */ |
| 601 | static loff_t udf_check_vsd(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | { |
| 603 | struct volStructDesc *vsd = NULL; |
Sebastian Manciulea | f4bcbbd | 2008-04-08 14:02:11 +0200 | [diff] [blame] | 604 | loff_t sector = 32768; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | int sectorsize; |
| 606 | struct buffer_head *bh = NULL; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 607 | int nsr02 = 0; |
| 608 | int nsr03 = 0; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 609 | struct udf_sb_info *sbi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 611 | sbi = UDF_SB(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | if (sb->s_blocksize < sizeof(struct volStructDesc)) |
| 613 | sectorsize = sizeof(struct volStructDesc); |
| 614 | else |
| 615 | sectorsize = sb->s_blocksize; |
| 616 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 617 | sector += (sbi->s_session << sb->s_blocksize_bits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | |
| 619 | udf_debug("Starting at sector %u (%ld byte sectors)\n", |
Sebastian Manciulea | 706047a | 2008-04-14 17:13:01 +0200 | [diff] [blame] | 620 | (unsigned int)(sector >> sb->s_blocksize_bits), |
| 621 | sb->s_blocksize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | /* Process the sequence (if applicable) */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 623 | for (; !nsr02 && !nsr03; sector += sectorsize) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | /* Read a block */ |
| 625 | bh = udf_tread(sb, sector >> sb->s_blocksize_bits); |
| 626 | if (!bh) |
| 627 | break; |
| 628 | |
| 629 | /* Look for ISO descriptors */ |
| 630 | vsd = (struct volStructDesc *)(bh->b_data + |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 631 | (sector & (sb->s_blocksize - 1))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 633 | if (vsd->stdIdent[0] == 0) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 634 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | break; |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 636 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, |
| 637 | VSD_STD_ID_LEN)) { |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 638 | switch (vsd->structType) { |
| 639 | case 0: |
| 640 | udf_debug("ISO9660 Boot Record found\n"); |
| 641 | break; |
| 642 | case 1: |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 643 | udf_debug("ISO9660 Primary Volume Descriptor found\n"); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 644 | break; |
| 645 | case 2: |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 646 | udf_debug("ISO9660 Supplementary Volume Descriptor found\n"); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 647 | break; |
| 648 | case 3: |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 649 | udf_debug("ISO9660 Volume Partition Descriptor found\n"); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 650 | break; |
| 651 | case 255: |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 652 | udf_debug("ISO9660 Volume Descriptor Set Terminator found\n"); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 653 | break; |
| 654 | default: |
| 655 | udf_debug("ISO9660 VRS (%u) found\n", |
| 656 | vsd->structType); |
| 657 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | } |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 659 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, |
| 660 | VSD_STD_ID_LEN)) |
| 661 | ; /* nothing */ |
| 662 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, |
| 663 | VSD_STD_ID_LEN)) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 664 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | break; |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 666 | } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, |
| 667 | VSD_STD_ID_LEN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | nsr02 = sector; |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 669 | else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, |
| 670 | VSD_STD_ID_LEN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | nsr03 = sector; |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 672 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | } |
| 674 | |
| 675 | if (nsr03) |
| 676 | return nsr03; |
| 677 | else if (nsr02) |
| 678 | return nsr02; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 679 | else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | return -1; |
| 681 | else |
| 682 | return 0; |
| 683 | } |
| 684 | |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 685 | static int udf_find_fileset(struct super_block *sb, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 686 | struct kernel_lb_addr *fileset, |
| 687 | struct kernel_lb_addr *root) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | { |
| 689 | struct buffer_head *bh = NULL; |
| 690 | long lastblock; |
| 691 | uint16_t ident; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 692 | struct udf_sb_info *sbi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | |
| 694 | if (fileset->logicalBlockNum != 0xFFFFFFFF || |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 695 | fileset->partitionReferenceNum != 0xFFFF) { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 696 | bh = udf_read_ptagged(sb, fileset, 0, &ident); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 698 | if (!bh) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | return 1; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 700 | } else if (ident != TAG_IDENT_FSD) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 701 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | return 1; |
| 703 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 704 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | } |
| 706 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 707 | sbi = UDF_SB(sb); |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 708 | if (!bh) { |
| 709 | /* Search backwards through the partitions */ |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 710 | struct kernel_lb_addr newfileset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 712 | /* --> cvg: FIXME - is it reasonable? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | return 1; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 714 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 715 | for (newfileset.partitionReferenceNum = sbi->s_partitions - 1; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 716 | (newfileset.partitionReferenceNum != 0xFFFF && |
| 717 | fileset->logicalBlockNum == 0xFFFFFFFF && |
| 718 | fileset->partitionReferenceNum == 0xFFFF); |
| 719 | newfileset.partitionReferenceNum--) { |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 720 | lastblock = sbi->s_partmaps |
| 721 | [newfileset.partitionReferenceNum] |
| 722 | .s_partition_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | newfileset.logicalBlockNum = 0; |
| 724 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 725 | do { |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 726 | bh = udf_read_ptagged(sb, &newfileset, 0, |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 727 | &ident); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 728 | if (!bh) { |
| 729 | newfileset.logicalBlockNum++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | continue; |
| 731 | } |
| 732 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 733 | switch (ident) { |
| 734 | case TAG_IDENT_SBD: |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 735 | { |
| 736 | struct spaceBitmapDesc *sp; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 737 | sp = (struct spaceBitmapDesc *) |
| 738 | bh->b_data; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 739 | newfileset.logicalBlockNum += 1 + |
| 740 | ((le32_to_cpu(sp->numOfBytes) + |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 741 | sizeof(struct spaceBitmapDesc) |
| 742 | - 1) >> sb->s_blocksize_bits); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 743 | brelse(bh); |
| 744 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | } |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 746 | case TAG_IDENT_FSD: |
| 747 | *fileset = newfileset; |
| 748 | break; |
| 749 | default: |
| 750 | newfileset.logicalBlockNum++; |
| 751 | brelse(bh); |
| 752 | bh = NULL; |
| 753 | break; |
| 754 | } |
| 755 | } while (newfileset.logicalBlockNum < lastblock && |
| 756 | fileset->logicalBlockNum == 0xFFFFFFFF && |
| 757 | fileset->partitionReferenceNum == 0xFFFF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | } |
| 759 | } |
| 760 | |
| 761 | if ((fileset->logicalBlockNum != 0xFFFFFFFF || |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 762 | fileset->partitionReferenceNum != 0xFFFF) && bh) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | udf_debug("Fileset at block=%d, partition=%d\n", |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 764 | fileset->logicalBlockNum, |
| 765 | fileset->partitionReferenceNum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 767 | sbi->s_partition = fileset->partitionReferenceNum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | udf_load_fileset(sb, bh, root); |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 769 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | return 0; |
| 771 | } |
| 772 | return 1; |
| 773 | } |
| 774 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 775 | static int udf_load_pvoldesc(struct super_block *sb, sector_t block) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | { |
| 777 | struct primaryVolDesc *pvoldesc; |
Marcin Slusarz | ba9aadd | 2008-11-16 19:01:44 +0100 | [diff] [blame] | 778 | struct ustr *instr, *outstr; |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 779 | struct buffer_head *bh; |
| 780 | uint16_t ident; |
Marcin Slusarz | ba9aadd | 2008-11-16 19:01:44 +0100 | [diff] [blame] | 781 | int ret = 1; |
| 782 | |
| 783 | instr = kmalloc(sizeof(struct ustr), GFP_NOFS); |
| 784 | if (!instr) |
| 785 | return 1; |
| 786 | |
| 787 | outstr = kmalloc(sizeof(struct ustr), GFP_NOFS); |
| 788 | if (!outstr) |
| 789 | goto out1; |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 790 | |
| 791 | bh = udf_read_tagged(sb, block, block, &ident); |
| 792 | if (!bh) |
Marcin Slusarz | ba9aadd | 2008-11-16 19:01:44 +0100 | [diff] [blame] | 793 | goto out2; |
| 794 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 795 | BUG_ON(ident != TAG_IDENT_PVD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | |
| 797 | pvoldesc = (struct primaryVolDesc *)bh->b_data; |
| 798 | |
Marcin Slusarz | 5677480 | 2008-02-10 11:25:31 +0100 | [diff] [blame] | 799 | if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time, |
| 800 | pvoldesc->recordingDateAndTime)) { |
Marcin Slusarz | af15a29 | 2008-02-10 11:29:10 +0100 | [diff] [blame] | 801 | #ifdef UDFFS_DEBUG |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 802 | struct timestamp *ts = &pvoldesc->recordingDateAndTime; |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 803 | udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n", |
Marcin Slusarz | af15a29 | 2008-02-10 11:29:10 +0100 | [diff] [blame] | 804 | le16_to_cpu(ts->year), ts->month, ts->day, ts->hour, |
| 805 | ts->minute, le16_to_cpu(ts->typeAndTimezone)); |
| 806 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | } |
| 808 | |
Marcin Slusarz | ba9aadd | 2008-11-16 19:01:44 +0100 | [diff] [blame] | 809 | if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) |
| 810 | if (udf_CS0toUTF8(outstr, instr)) { |
| 811 | strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, |
| 812 | outstr->u_len > 31 ? 31 : outstr->u_len); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 813 | udf_debug("volIdent[] = '%s'\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 814 | UDF_SB(sb)->s_volume_ident); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
Marcin Slusarz | ba9aadd | 2008-11-16 19:01:44 +0100 | [diff] [blame] | 817 | if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) |
| 818 | if (udf_CS0toUTF8(outstr, instr)) |
| 819 | udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 820 | |
| 821 | brelse(bh); |
Marcin Slusarz | ba9aadd | 2008-11-16 19:01:44 +0100 | [diff] [blame] | 822 | ret = 0; |
| 823 | out2: |
| 824 | kfree(outstr); |
| 825 | out1: |
| 826 | kfree(instr); |
| 827 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | } |
| 829 | |
Namjae Jeon | 3080a74 | 2011-10-23 19:28:32 +0900 | [diff] [blame] | 830 | struct inode *udf_find_metadata_inode_efe(struct super_block *sb, |
| 831 | u32 meta_file_loc, u32 partition_num) |
| 832 | { |
| 833 | struct kernel_lb_addr addr; |
| 834 | struct inode *metadata_fe; |
| 835 | |
| 836 | addr.logicalBlockNum = meta_file_loc; |
| 837 | addr.partitionReferenceNum = partition_num; |
| 838 | |
| 839 | metadata_fe = udf_iget(sb, &addr); |
| 840 | |
| 841 | if (metadata_fe == NULL) |
| 842 | udf_warn(sb, "metadata inode efe not found\n"); |
| 843 | else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) { |
| 844 | udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n"); |
| 845 | iput(metadata_fe); |
| 846 | metadata_fe = NULL; |
| 847 | } |
| 848 | |
| 849 | return metadata_fe; |
| 850 | } |
| 851 | |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 852 | static int udf_load_metadata_files(struct super_block *sb, int partition) |
| 853 | { |
| 854 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 855 | struct udf_part_map *map; |
| 856 | struct udf_meta_data *mdata; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 857 | struct kernel_lb_addr addr; |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 858 | |
| 859 | map = &sbi->s_partmaps[partition]; |
| 860 | mdata = &map->s_type_specific.s_metadata; |
| 861 | |
| 862 | /* metadata address */ |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 863 | udf_debug("Metadata file location: block = %d part = %d\n", |
Namjae Jeon | 3080a74 | 2011-10-23 19:28:32 +0900 | [diff] [blame] | 864 | mdata->s_meta_file_loc, map->s_partition_num); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 865 | |
Namjae Jeon | 3080a74 | 2011-10-23 19:28:32 +0900 | [diff] [blame] | 866 | mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb, |
| 867 | mdata->s_meta_file_loc, map->s_partition_num); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 868 | |
| 869 | if (mdata->s_metadata_fe == NULL) { |
Namjae Jeon | 3080a74 | 2011-10-23 19:28:32 +0900 | [diff] [blame] | 870 | /* mirror file entry */ |
| 871 | udf_debug("Mirror metadata file location: block = %d part = %d\n", |
| 872 | mdata->s_mirror_file_loc, map->s_partition_num); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 873 | |
Namjae Jeon | 3080a74 | 2011-10-23 19:28:32 +0900 | [diff] [blame] | 874 | mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb, |
| 875 | mdata->s_mirror_file_loc, map->s_partition_num); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 876 | |
Namjae Jeon | 3080a74 | 2011-10-23 19:28:32 +0900 | [diff] [blame] | 877 | if (mdata->s_mirror_fe == NULL) { |
| 878 | 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] | 879 | goto error_exit; |
Namjae Jeon | 3080a74 | 2011-10-23 19:28:32 +0900 | [diff] [blame] | 880 | } |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 881 | } |
| 882 | |
| 883 | /* |
| 884 | * bitmap file entry |
| 885 | * Note: |
| 886 | * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102) |
| 887 | */ |
| 888 | if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) { |
| 889 | addr.logicalBlockNum = mdata->s_bitmap_file_loc; |
| 890 | addr.partitionReferenceNum = map->s_partition_num; |
| 891 | |
| 892 | udf_debug("Bitmap file location: block = %d part = %d\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 893 | addr.logicalBlockNum, addr.partitionReferenceNum); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 894 | |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 895 | mdata->s_bitmap_fe = udf_iget(sb, &addr); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 896 | |
| 897 | if (mdata->s_bitmap_fe == NULL) { |
| 898 | if (sb->s_flags & MS_RDONLY) |
Joe Perches | a40ecd7 | 2011-10-10 01:08:04 -0700 | [diff] [blame] | 899 | 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] | 900 | else { |
Joe Perches | 8076c36 | 2011-10-10 01:08:03 -0700 | [diff] [blame] | 901 | 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] | 902 | goto error_exit; |
| 903 | } |
| 904 | } |
| 905 | } |
| 906 | |
| 907 | udf_debug("udf_load_metadata_files Ok\n"); |
| 908 | |
| 909 | return 0; |
| 910 | |
| 911 | error_exit: |
| 912 | return 1; |
| 913 | } |
| 914 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 915 | 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] | 916 | struct kernel_lb_addr *root) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | { |
| 918 | struct fileSetDesc *fset; |
| 919 | |
| 920 | fset = (struct fileSetDesc *)bh->b_data; |
| 921 | |
| 922 | *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation); |
| 923 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 924 | UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 926 | udf_debug("Rootdir at block=%d, partition=%d\n", |
| 927 | root->logicalBlockNum, root->partitionReferenceNum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | } |
| 929 | |
Marcin Slusarz | 883cb9d | 2008-02-08 04:20:34 -0800 | [diff] [blame] | 930 | int udf_compute_nr_groups(struct super_block *sb, u32 partition) |
| 931 | { |
| 932 | struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition]; |
Julia Lawall | 8dee00b | 2008-02-14 16:15:45 +0100 | [diff] [blame] | 933 | return DIV_ROUND_UP(map->s_partition_len + |
| 934 | (sizeof(struct spaceBitmapDesc) << 3), |
| 935 | sb->s_blocksize * 8); |
Marcin Slusarz | 883cb9d | 2008-02-08 04:20:34 -0800 | [diff] [blame] | 936 | } |
| 937 | |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 938 | static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) |
| 939 | { |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 940 | struct udf_bitmap *bitmap; |
| 941 | int nr_groups; |
| 942 | int size; |
| 943 | |
Marcin Slusarz | 883cb9d | 2008-02-08 04:20:34 -0800 | [diff] [blame] | 944 | nr_groups = udf_compute_nr_groups(sb, index); |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 945 | size = sizeof(struct udf_bitmap) + |
| 946 | (sizeof(struct buffer_head *) * nr_groups); |
| 947 | |
| 948 | if (size <= PAGE_SIZE) |
Joe Perches | ed2ae6f | 2010-11-04 20:08:04 -0700 | [diff] [blame] | 949 | bitmap = kzalloc(size, GFP_KERNEL); |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 950 | else |
Joe Perches | ed2ae6f | 2010-11-04 20:08:04 -0700 | [diff] [blame] | 951 | bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 952 | |
| 953 | if (bitmap == NULL) { |
Joe Perches | 8076c36 | 2011-10-10 01:08:03 -0700 | [diff] [blame] | 954 | udf_err(sb, "Unable to allocate space for bitmap and %d buffer_head pointers\n", |
| 955 | nr_groups); |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 956 | return NULL; |
| 957 | } |
| 958 | |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 959 | bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); |
| 960 | bitmap->s_nr_groups = nr_groups; |
| 961 | return bitmap; |
| 962 | } |
| 963 | |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 964 | static int udf_fill_partdesc_info(struct super_block *sb, |
| 965 | struct partitionDesc *p, int p_index) |
| 966 | { |
| 967 | struct udf_part_map *map; |
| 968 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 969 | struct partitionHeaderDesc *phd; |
| 970 | |
| 971 | map = &sbi->s_partmaps[p_index]; |
| 972 | |
| 973 | map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */ |
| 974 | map->s_partition_root = le32_to_cpu(p->partitionStartingLocation); |
| 975 | |
| 976 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY)) |
| 977 | map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY; |
| 978 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE)) |
| 979 | map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE; |
| 980 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE)) |
| 981 | map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE; |
| 982 | if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE)) |
| 983 | map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE; |
| 984 | |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 985 | udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n", |
| 986 | p_index, map->s_partition_type, |
| 987 | map->s_partition_root, map->s_partition_len); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 988 | |
| 989 | if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) && |
| 990 | strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03)) |
| 991 | return 0; |
| 992 | |
| 993 | phd = (struct partitionHeaderDesc *)p->partitionContentsUse; |
| 994 | if (phd->unallocSpaceTable.extLength) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 995 | struct kernel_lb_addr loc = { |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 996 | .logicalBlockNum = le32_to_cpu( |
| 997 | phd->unallocSpaceTable.extPosition), |
| 998 | .partitionReferenceNum = p_index, |
| 999 | }; |
| 1000 | |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1001 | map->s_uspace.s_table = udf_iget(sb, &loc); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1002 | if (!map->s_uspace.s_table) { |
| 1003 | udf_debug("cannot load unallocSpaceTable (part %d)\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1004 | p_index); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1005 | return 1; |
| 1006 | } |
| 1007 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE; |
| 1008 | udf_debug("unallocSpaceTable (part %d) @ %ld\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1009 | p_index, map->s_uspace.s_table->i_ino); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1010 | } |
| 1011 | |
| 1012 | if (phd->unallocSpaceBitmap.extLength) { |
| 1013 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
| 1014 | if (!bitmap) |
| 1015 | return 1; |
| 1016 | map->s_uspace.s_bitmap = bitmap; |
| 1017 | bitmap->s_extLength = le32_to_cpu( |
| 1018 | phd->unallocSpaceBitmap.extLength); |
| 1019 | bitmap->s_extPosition = le32_to_cpu( |
| 1020 | phd->unallocSpaceBitmap.extPosition); |
| 1021 | map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP; |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1022 | udf_debug("unallocSpaceBitmap (part %d) @ %d\n", |
| 1023 | p_index, bitmap->s_extPosition); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1024 | } |
| 1025 | |
| 1026 | if (phd->partitionIntegrityTable.extLength) |
| 1027 | udf_debug("partitionIntegrityTable (part %d)\n", p_index); |
| 1028 | |
| 1029 | if (phd->freedSpaceTable.extLength) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1030 | struct kernel_lb_addr loc = { |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1031 | .logicalBlockNum = le32_to_cpu( |
| 1032 | phd->freedSpaceTable.extPosition), |
| 1033 | .partitionReferenceNum = p_index, |
| 1034 | }; |
| 1035 | |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 1036 | map->s_fspace.s_table = udf_iget(sb, &loc); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1037 | if (!map->s_fspace.s_table) { |
| 1038 | udf_debug("cannot load freedSpaceTable (part %d)\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1039 | p_index); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1040 | return 1; |
| 1041 | } |
| 1042 | |
| 1043 | map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE; |
| 1044 | udf_debug("freedSpaceTable (part %d) @ %ld\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1045 | p_index, map->s_fspace.s_table->i_ino); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1046 | } |
| 1047 | |
| 1048 | if (phd->freedSpaceBitmap.extLength) { |
| 1049 | struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index); |
| 1050 | if (!bitmap) |
| 1051 | return 1; |
| 1052 | map->s_fspace.s_bitmap = bitmap; |
| 1053 | bitmap->s_extLength = le32_to_cpu( |
| 1054 | phd->freedSpaceBitmap.extLength); |
| 1055 | bitmap->s_extPosition = le32_to_cpu( |
| 1056 | phd->freedSpaceBitmap.extPosition); |
| 1057 | map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP; |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1058 | udf_debug("freedSpaceBitmap (part %d) @ %d\n", |
| 1059 | p_index, bitmap->s_extPosition); |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1060 | } |
| 1061 | return 0; |
| 1062 | } |
| 1063 | |
Jan Kara | e971b0b | 2009-11-30 19:47:55 +0100 | [diff] [blame] | 1064 | static void udf_find_vat_block(struct super_block *sb, int p_index, |
| 1065 | int type1_index, sector_t start_block) |
| 1066 | { |
| 1067 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1068 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; |
| 1069 | sector_t vat_block; |
| 1070 | struct kernel_lb_addr ino; |
| 1071 | |
| 1072 | /* |
| 1073 | * VAT file entry is in the last recorded block. Some broken disks have |
| 1074 | * it a few blocks before so try a bit harder... |
| 1075 | */ |
| 1076 | ino.partitionReferenceNum = type1_index; |
| 1077 | for (vat_block = start_block; |
| 1078 | vat_block >= map->s_partition_root && |
| 1079 | vat_block >= start_block - 3 && |
| 1080 | !sbi->s_vat_inode; vat_block--) { |
| 1081 | ino.logicalBlockNum = vat_block - map->s_partition_root; |
| 1082 | sbi->s_vat_inode = udf_iget(sb, &ino); |
| 1083 | } |
| 1084 | } |
| 1085 | |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1086 | static int udf_load_vat(struct super_block *sb, int p_index, int type1_index) |
| 1087 | { |
| 1088 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1089 | struct udf_part_map *map = &sbi->s_partmaps[p_index]; |
Jan Kara | fa5e081 | 2008-04-08 02:08:53 +0200 | [diff] [blame] | 1090 | struct buffer_head *bh = NULL; |
| 1091 | struct udf_inode_info *vati; |
| 1092 | uint32_t pos; |
| 1093 | struct virtualAllocationTable20 *vat20; |
Jan Kara | 4bf17af | 2009-07-14 19:30:23 +0200 | [diff] [blame] | 1094 | 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] | 1095 | |
Jan Kara | e971b0b | 2009-11-30 19:47:55 +0100 | [diff] [blame] | 1096 | 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] | 1097 | if (!sbi->s_vat_inode && |
| 1098 | sbi->s_last_block != blocks - 1) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1099 | pr_notice("Failed to read VAT inode from the last recorded block (%lu), retrying with the last block of the device (%lu).\n", |
| 1100 | (unsigned long)sbi->s_last_block, |
| 1101 | (unsigned long)blocks - 1); |
Jan Kara | e971b0b | 2009-11-30 19:47:55 +0100 | [diff] [blame] | 1102 | udf_find_vat_block(sb, p_index, type1_index, blocks - 1); |
Jan Kara | 4bf17af | 2009-07-14 19:30:23 +0200 | [diff] [blame] | 1103 | } |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1104 | if (!sbi->s_vat_inode) |
| 1105 | return 1; |
| 1106 | |
| 1107 | if (map->s_partition_type == UDF_VIRTUAL_MAP15) { |
Sebastian Manciulea | 47c9358 | 2008-04-14 17:06:36 +0200 | [diff] [blame] | 1108 | map->s_type_specific.s_virtual.s_start_offset = 0; |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1109 | map->s_type_specific.s_virtual.s_num_entries = |
| 1110 | (sbi->s_vat_inode->i_size - 36) >> 2; |
| 1111 | } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) { |
Jan Kara | fa5e081 | 2008-04-08 02:08:53 +0200 | [diff] [blame] | 1112 | vati = UDF_I(sbi->s_vat_inode); |
| 1113 | if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) { |
| 1114 | pos = udf_block_map(sbi->s_vat_inode, 0); |
| 1115 | bh = sb_bread(sb, pos); |
| 1116 | if (!bh) |
| 1117 | return 1; |
| 1118 | vat20 = (struct virtualAllocationTable20 *)bh->b_data; |
| 1119 | } else { |
| 1120 | vat20 = (struct virtualAllocationTable20 *) |
| 1121 | vati->i_ext.i_data; |
| 1122 | } |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1123 | |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1124 | map->s_type_specific.s_virtual.s_start_offset = |
Sebastian Manciulea | 47c9358 | 2008-04-14 17:06:36 +0200 | [diff] [blame] | 1125 | le16_to_cpu(vat20->lengthHeader); |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1126 | map->s_type_specific.s_virtual.s_num_entries = |
| 1127 | (sbi->s_vat_inode->i_size - |
| 1128 | map->s_type_specific.s_virtual. |
| 1129 | s_start_offset) >> 2; |
| 1130 | brelse(bh); |
| 1131 | } |
| 1132 | return 0; |
| 1133 | } |
| 1134 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1135 | static int udf_load_partdesc(struct super_block *sb, sector_t block) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | { |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1137 | struct buffer_head *bh; |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1138 | struct partitionDesc *p; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1139 | struct udf_part_map *map; |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1140 | struct udf_sb_info *sbi = UDF_SB(sb); |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1141 | int i, type1_idx; |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1142 | uint16_t partitionNumber; |
| 1143 | uint16_t ident; |
| 1144 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1146 | bh = udf_read_tagged(sb, block, block, &ident); |
| 1147 | if (!bh) |
| 1148 | return 1; |
| 1149 | if (ident != TAG_IDENT_PD) |
| 1150 | goto out_bh; |
| 1151 | |
| 1152 | p = (struct partitionDesc *)bh->b_data; |
| 1153 | partitionNumber = le16_to_cpu(p->partitionNumber); |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1154 | |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1155 | /* First scan for TYPE1, SPARABLE and METADATA partitions */ |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1156 | for (i = 0; i < sbi->s_partitions; i++) { |
| 1157 | map = &sbi->s_partmaps[i]; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1158 | udf_debug("Searching map: (%d == %d)\n", |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1159 | map->s_partition_num, partitionNumber); |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1160 | if (map->s_partition_num == partitionNumber && |
| 1161 | (map->s_partition_type == UDF_TYPE1_MAP15 || |
| 1162 | map->s_partition_type == UDF_SPARABLE_MAP15)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | break; |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1164 | } |
| 1165 | |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1166 | if (i >= sbi->s_partitions) { |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1167 | udf_debug("Partition (%d) not found in partition map\n", |
| 1168 | partitionNumber); |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1169 | goto out_bh; |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1170 | } |
| 1171 | |
Jan Kara | 3fb38df | 2008-04-02 12:26:36 +0200 | [diff] [blame] | 1172 | ret = udf_fill_partdesc_info(sb, p, i); |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1173 | |
| 1174 | /* |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1175 | * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and |
| 1176 | * PHYSICAL partitions are already set up |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1177 | */ |
| 1178 | type1_idx = i; |
| 1179 | for (i = 0; i < sbi->s_partitions; i++) { |
| 1180 | map = &sbi->s_partmaps[i]; |
| 1181 | |
| 1182 | if (map->s_partition_num == partitionNumber && |
| 1183 | (map->s_partition_type == UDF_VIRTUAL_MAP15 || |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1184 | map->s_partition_type == UDF_VIRTUAL_MAP20 || |
| 1185 | map->s_partition_type == UDF_METADATA_MAP25)) |
Jan Kara | 38b74a5 | 2008-04-02 16:01:35 +0200 | [diff] [blame] | 1186 | break; |
| 1187 | } |
| 1188 | |
| 1189 | if (i >= sbi->s_partitions) |
| 1190 | goto out_bh; |
| 1191 | |
| 1192 | ret = udf_fill_partdesc_info(sb, p, i); |
| 1193 | if (ret) |
| 1194 | goto out_bh; |
| 1195 | |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1196 | if (map->s_partition_type == UDF_METADATA_MAP25) { |
| 1197 | ret = udf_load_metadata_files(sb, i); |
| 1198 | if (ret) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1199 | udf_err(sb, "error loading MetaData partition map %d\n", |
| 1200 | i); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1201 | goto out_bh; |
| 1202 | } |
| 1203 | } else { |
| 1204 | ret = udf_load_vat(sb, i, type1_idx); |
| 1205 | if (ret) |
| 1206 | goto out_bh; |
| 1207 | /* |
| 1208 | * Mark filesystem read-only if we have a partition with |
| 1209 | * virtual map since we don't handle writing to it (we |
| 1210 | * overwrite blocks instead of relocating them). |
| 1211 | */ |
| 1212 | sb->s_flags |= MS_RDONLY; |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1213 | 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] | 1214 | } |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1215 | out_bh: |
Jan Kara | 2e0838f | 2008-04-01 18:08:51 +0200 | [diff] [blame] | 1216 | /* In case loading failed, we handle cleanup in udf_fill_super */ |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1217 | brelse(bh); |
| 1218 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | } |
| 1220 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1221 | static int udf_load_logicalvol(struct super_block *sb, sector_t block, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1222 | struct kernel_lb_addr *fileset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | { |
| 1224 | struct logicalVolDesc *lvd; |
| 1225 | int i, j, offset; |
| 1226 | uint8_t type; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1227 | struct udf_sb_info *sbi = UDF_SB(sb); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1228 | struct genericPartitionMap *gpm; |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1229 | uint16_t ident; |
| 1230 | struct buffer_head *bh; |
| 1231 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1233 | bh = udf_read_tagged(sb, block, block, &ident); |
| 1234 | if (!bh) |
| 1235 | return 1; |
| 1236 | BUG_ON(ident != TAG_IDENT_LVD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | lvd = (struct logicalVolDesc *)bh->b_data; |
| 1238 | |
Marcin Slusarz | dc5d39b | 2008-02-08 04:20:32 -0800 | [diff] [blame] | 1239 | i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps)); |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1240 | if (i != 0) { |
| 1241 | ret = i; |
| 1242 | goto out_bh; |
| 1243 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1245 | for (i = 0, offset = 0; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1246 | i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1247 | i++, offset += gpm->partitionMapLength) { |
| 1248 | struct udf_part_map *map = &sbi->s_partmaps[i]; |
| 1249 | gpm = (struct genericPartitionMap *) |
| 1250 | &(lvd->partitionMaps[offset]); |
| 1251 | type = gpm->partitionMapType; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1252 | if (type == 1) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1253 | struct genericPartitionMap1 *gpm1 = |
| 1254 | (struct genericPartitionMap1 *)gpm; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1255 | map->s_partition_type = UDF_TYPE1_MAP15; |
| 1256 | map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum); |
| 1257 | map->s_partition_num = le16_to_cpu(gpm1->partitionNum); |
| 1258 | map->s_partition_func = NULL; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1259 | } else if (type == 2) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1260 | struct udfPartitionMap2 *upm2 = |
| 1261 | (struct udfPartitionMap2 *)gpm; |
| 1262 | if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, |
| 1263 | strlen(UDF_ID_VIRTUAL))) { |
| 1264 | u16 suf = |
| 1265 | le16_to_cpu(((__le16 *)upm2->partIdent. |
| 1266 | identSuffix)[0]); |
Jan Kara | c82a127 | 2008-04-08 01:16:32 +0200 | [diff] [blame] | 1267 | if (suf < 0x0200) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1268 | map->s_partition_type = |
| 1269 | UDF_VIRTUAL_MAP15; |
| 1270 | map->s_partition_func = |
| 1271 | udf_get_pblock_virt15; |
Jan Kara | c82a127 | 2008-04-08 01:16:32 +0200 | [diff] [blame] | 1272 | } else { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1273 | map->s_partition_type = |
| 1274 | UDF_VIRTUAL_MAP20; |
| 1275 | map->s_partition_func = |
| 1276 | udf_get_pblock_virt20; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | } |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1278 | } else if (!strncmp(upm2->partIdent.ident, |
| 1279 | UDF_ID_SPARABLE, |
| 1280 | strlen(UDF_ID_SPARABLE))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | uint32_t loc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | struct sparingTable *st; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1283 | struct sparablePartitionMap *spm = |
| 1284 | (struct sparablePartitionMap *)gpm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1286 | map->s_partition_type = UDF_SPARABLE_MAP15; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1287 | map->s_type_specific.s_sparing.s_packet_len = |
| 1288 | le16_to_cpu(spm->packetLength); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1289 | for (j = 0; j < spm->numSparingTables; j++) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1290 | struct buffer_head *bh2; |
| 1291 | |
| 1292 | loc = le32_to_cpu( |
| 1293 | spm->locSparingTable[j]); |
| 1294 | bh2 = udf_read_tagged(sb, loc, loc, |
| 1295 | &ident); |
| 1296 | map->s_type_specific.s_sparing. |
| 1297 | s_spar_map[j] = bh2; |
| 1298 | |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1299 | if (bh2 == NULL) |
| 1300 | continue; |
| 1301 | |
| 1302 | st = (struct sparingTable *)bh2->b_data; |
| 1303 | if (ident != 0 || strncmp( |
| 1304 | st->sparingIdent.ident, |
| 1305 | UDF_ID_SPARING, |
| 1306 | strlen(UDF_ID_SPARING))) { |
| 1307 | brelse(bh2); |
| 1308 | map->s_type_specific.s_sparing. |
| 1309 | s_spar_map[j] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | } |
| 1311 | } |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1312 | map->s_partition_func = udf_get_pblock_spar15; |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1313 | } else if (!strncmp(upm2->partIdent.ident, |
| 1314 | UDF_ID_METADATA, |
| 1315 | strlen(UDF_ID_METADATA))) { |
| 1316 | struct udf_meta_data *mdata = |
| 1317 | &map->s_type_specific.s_metadata; |
| 1318 | struct metadataPartitionMap *mdm = |
| 1319 | (struct metadataPartitionMap *) |
| 1320 | &(lvd->partitionMaps[offset]); |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1321 | udf_debug("Parsing Logical vol part %d type %d id=%s\n", |
| 1322 | i, type, UDF_ID_METADATA); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1323 | |
| 1324 | map->s_partition_type = UDF_METADATA_MAP25; |
| 1325 | map->s_partition_func = udf_get_pblock_meta25; |
| 1326 | |
| 1327 | mdata->s_meta_file_loc = |
| 1328 | le32_to_cpu(mdm->metadataFileLoc); |
| 1329 | mdata->s_mirror_file_loc = |
| 1330 | le32_to_cpu(mdm->metadataMirrorFileLoc); |
| 1331 | mdata->s_bitmap_file_loc = |
| 1332 | le32_to_cpu(mdm->metadataBitmapFileLoc); |
| 1333 | mdata->s_alloc_unit_size = |
| 1334 | le32_to_cpu(mdm->allocUnitSize); |
| 1335 | mdata->s_align_unit_size = |
| 1336 | le16_to_cpu(mdm->alignUnitSize); |
Jan Kara | ed47a7d | 2011-10-24 16:47:48 +0200 | [diff] [blame] | 1337 | if (mdm->flags & 0x01) |
| 1338 | mdata->s_flags |= MF_DUPLICATE_MD; |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1339 | |
| 1340 | udf_debug("Metadata Ident suffix=0x%x\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1341 | le16_to_cpu(*(__le16 *) |
| 1342 | mdm->partIdent.identSuffix)); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1343 | udf_debug("Metadata part num=%d\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1344 | le16_to_cpu(mdm->partitionNum)); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1345 | udf_debug("Metadata part alloc unit size=%d\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1346 | le32_to_cpu(mdm->allocUnitSize)); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1347 | udf_debug("Metadata file loc=%d\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1348 | le32_to_cpu(mdm->metadataFileLoc)); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1349 | udf_debug("Mirror file loc=%d\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1350 | le32_to_cpu(mdm->metadataMirrorFileLoc)); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1351 | udf_debug("Bitmap file loc=%d\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1352 | le32_to_cpu(mdm->metadataBitmapFileLoc)); |
Jan Kara | ed47a7d | 2011-10-24 16:47:48 +0200 | [diff] [blame] | 1353 | udf_debug("Flags: %d %d\n", |
| 1354 | mdata->s_flags, mdm->flags); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1355 | } else { |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 1356 | udf_debug("Unknown ident: %s\n", |
| 1357 | upm2->partIdent.ident); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | continue; |
| 1359 | } |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1360 | map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum); |
| 1361 | map->s_partition_num = le16_to_cpu(upm2->partitionNum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | } |
| 1363 | udf_debug("Partition (%d:%d) type %d on volume %d\n", |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1364 | i, map->s_partition_num, type, map->s_volumeseqnum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | } |
| 1366 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1367 | if (fileset) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1368 | struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | |
| 1370 | *fileset = lelb_to_cpu(la->extLocation); |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1371 | udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n", |
| 1372 | fileset->logicalBlockNum, |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1373 | fileset->partitionReferenceNum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | } |
| 1375 | if (lvd->integritySeqExt.extLength) |
| 1376 | udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt)); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1377 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1378 | out_bh: |
| 1379 | brelse(bh); |
| 1380 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | } |
| 1382 | |
| 1383 | /* |
| 1384 | * udf_load_logicalvolint |
| 1385 | * |
| 1386 | */ |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1387 | 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] | 1388 | { |
| 1389 | struct buffer_head *bh = NULL; |
| 1390 | uint16_t ident; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1391 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1392 | struct logicalVolIntegrityDesc *lvid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | |
| 1394 | while (loc.extLength > 0 && |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1395 | (bh = udf_read_tagged(sb, loc.extLocation, |
| 1396 | loc.extLocation, &ident)) && |
| 1397 | ident == TAG_IDENT_LVID) { |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1398 | sbi->s_lvid_bh = bh; |
| 1399 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1400 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1401 | if (lvid->nextIntegrityExt.extLength) |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 1402 | udf_load_logicalvolint(sb, |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1403 | leea_to_cpu(lvid->nextIntegrityExt)); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1404 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1405 | if (sbi->s_lvid_bh != bh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1406 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | loc.extLength -= sb->s_blocksize; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1408 | loc.extLocation++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | } |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1410 | if (sbi->s_lvid_bh != bh) |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1411 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | } |
| 1413 | |
| 1414 | /* |
| 1415 | * udf_process_sequence |
| 1416 | * |
| 1417 | * PURPOSE |
| 1418 | * Process a main/reserve volume descriptor sequence. |
| 1419 | * |
| 1420 | * PRE-CONDITIONS |
| 1421 | * sb Pointer to _locked_ superblock. |
| 1422 | * block First block of first extent of the sequence. |
| 1423 | * lastblock Lastblock of first extent of the sequence. |
| 1424 | * |
| 1425 | * HISTORY |
| 1426 | * July 1, 1997 - Andrew E. Mileski |
| 1427 | * Written, tested, and released. |
| 1428 | */ |
Jan Kara | 200a359 | 2008-03-04 13:03:09 +0100 | [diff] [blame] | 1429 | static noinline int udf_process_sequence(struct super_block *sb, long block, |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1430 | long lastblock, struct kernel_lb_addr *fileset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | { |
| 1432 | struct buffer_head *bh = NULL; |
| 1433 | struct udf_vds_record vds[VDS_POS_LENGTH]; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1434 | struct udf_vds_record *curr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | struct generic_desc *gd; |
| 1436 | struct volDescPtr *vdp; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1437 | int done = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | uint32_t vdsn; |
| 1439 | uint16_t ident; |
| 1440 | long next_s = 0, next_e = 0; |
| 1441 | |
| 1442 | memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH); |
| 1443 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1444 | /* |
| 1445 | * Read the main descriptor sequence and find which descriptors |
| 1446 | * are in it. |
| 1447 | */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1448 | for (; (!done && block <= lastblock); block++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | |
| 1450 | bh = udf_read_tagged(sb, block, block, &ident); |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1451 | if (!bh) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1452 | udf_err(sb, |
| 1453 | "Block %llu of volume descriptor sequence is corrupted or we could not read it\n", |
| 1454 | (unsigned long long)block); |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1455 | return 1; |
| 1456 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | |
| 1458 | /* Process each descriptor (ISO 13346 3/8.3-8.4) */ |
| 1459 | gd = (struct generic_desc *)bh->b_data; |
| 1460 | vdsn = le32_to_cpu(gd->volDescSeqNum); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1461 | switch (ident) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1462 | case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1463 | curr = &vds[VDS_POS_PRIMARY_VOL_DESC]; |
| 1464 | if (vdsn >= curr->volDescSeqNum) { |
| 1465 | curr->volDescSeqNum = vdsn; |
| 1466 | curr->block = block; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1467 | } |
| 1468 | break; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1469 | case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1470 | curr = &vds[VDS_POS_VOL_DESC_PTR]; |
| 1471 | if (vdsn >= curr->volDescSeqNum) { |
| 1472 | curr->volDescSeqNum = vdsn; |
| 1473 | curr->block = block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1475 | vdp = (struct volDescPtr *)bh->b_data; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1476 | next_s = le32_to_cpu( |
| 1477 | vdp->nextVolDescSeqExt.extLocation); |
| 1478 | next_e = le32_to_cpu( |
| 1479 | vdp->nextVolDescSeqExt.extLength); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1480 | next_e = next_e >> sb->s_blocksize_bits; |
| 1481 | next_e += next_s; |
| 1482 | } |
| 1483 | break; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1484 | case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1485 | curr = &vds[VDS_POS_IMP_USE_VOL_DESC]; |
| 1486 | if (vdsn >= curr->volDescSeqNum) { |
| 1487 | curr->volDescSeqNum = vdsn; |
| 1488 | curr->block = block; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1489 | } |
| 1490 | break; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1491 | case TAG_IDENT_PD: /* ISO 13346 3/10.5 */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1492 | curr = &vds[VDS_POS_PARTITION_DESC]; |
| 1493 | if (!curr->block) |
| 1494 | curr->block = block; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1495 | break; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1496 | case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1497 | curr = &vds[VDS_POS_LOGICAL_VOL_DESC]; |
| 1498 | if (vdsn >= curr->volDescSeqNum) { |
| 1499 | curr->volDescSeqNum = vdsn; |
| 1500 | curr->block = block; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1501 | } |
| 1502 | break; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1503 | case TAG_IDENT_USD: /* ISO 13346 3/10.8 */ |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1504 | curr = &vds[VDS_POS_UNALLOC_SPACE_DESC]; |
| 1505 | if (vdsn >= curr->volDescSeqNum) { |
| 1506 | curr->volDescSeqNum = vdsn; |
| 1507 | curr->block = block; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1508 | } |
| 1509 | break; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1510 | case TAG_IDENT_TD: /* ISO 13346 3/10.9 */ |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1511 | vds[VDS_POS_TERMINATING_DESC].block = block; |
| 1512 | if (next_e) { |
| 1513 | block = next_s; |
| 1514 | lastblock = next_e; |
| 1515 | next_s = next_e = 0; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1516 | } else |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1517 | done = 1; |
| 1518 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | } |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 1520 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | } |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1522 | /* |
| 1523 | * Now read interesting descriptors again and process them |
| 1524 | * in a suitable order |
| 1525 | */ |
| 1526 | if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1527 | udf_err(sb, "Primary Volume Descriptor not found!\n"); |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1528 | return 1; |
| 1529 | } |
| 1530 | if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block)) |
| 1531 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1533 | if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb, |
| 1534 | vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset)) |
| 1535 | return 1; |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1536 | |
Jan Kara | c0eb31e | 2008-04-01 16:50:35 +0200 | [diff] [blame] | 1537 | if (vds[VDS_POS_PARTITION_DESC].block) { |
| 1538 | /* |
| 1539 | * We rescan the whole descriptor sequence to find |
| 1540 | * partition descriptor blocks and process them. |
| 1541 | */ |
| 1542 | for (block = vds[VDS_POS_PARTITION_DESC].block; |
| 1543 | block < vds[VDS_POS_TERMINATING_DESC].block; |
| 1544 | block++) |
| 1545 | if (udf_load_partdesc(sb, block)) |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1546 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | } |
| 1548 | |
| 1549 | return 0; |
| 1550 | } |
| 1551 | |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1552 | static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh, |
| 1553 | struct kernel_lb_addr *fileset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1554 | { |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1555 | struct anchorVolDescPtr *anchor; |
| 1556 | long main_s, main_e, reserve_s, reserve_e; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1558 | anchor = (struct anchorVolDescPtr *)bh->b_data; |
| 1559 | |
| 1560 | /* Locate the main sequence */ |
| 1561 | main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation); |
| 1562 | main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength); |
| 1563 | main_e = main_e >> sb->s_blocksize_bits; |
| 1564 | main_e += main_s; |
| 1565 | |
| 1566 | /* Locate the reserve sequence */ |
| 1567 | reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation); |
| 1568 | reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength); |
| 1569 | reserve_e = reserve_e >> sb->s_blocksize_bits; |
| 1570 | reserve_e += reserve_s; |
| 1571 | |
| 1572 | /* Process the main & reserve sequences */ |
| 1573 | /* responsible for finding the PartitionDesc(s) */ |
| 1574 | if (!udf_process_sequence(sb, main_s, main_e, fileset)) |
| 1575 | return 1; |
| 1576 | return !udf_process_sequence(sb, reserve_s, reserve_e, fileset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | } |
| 1578 | |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1579 | /* |
| 1580 | * Check whether there is an anchor block in the given block and |
| 1581 | * load Volume Descriptor Sequence if so. |
| 1582 | */ |
| 1583 | static int udf_check_anchor_block(struct super_block *sb, sector_t block, |
| 1584 | struct kernel_lb_addr *fileset) |
| 1585 | { |
| 1586 | struct buffer_head *bh; |
| 1587 | uint16_t ident; |
| 1588 | int ret; |
| 1589 | |
| 1590 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) && |
| 1591 | udf_fixed_to_variable(block) >= |
| 1592 | sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits) |
| 1593 | return 0; |
| 1594 | |
| 1595 | bh = udf_read_tagged(sb, block, block, &ident); |
| 1596 | if (!bh) |
| 1597 | return 0; |
| 1598 | if (ident != TAG_IDENT_AVDP) { |
| 1599 | brelse(bh); |
| 1600 | return 0; |
| 1601 | } |
| 1602 | ret = udf_load_sequence(sb, bh, fileset); |
| 1603 | brelse(bh); |
| 1604 | return ret; |
| 1605 | } |
| 1606 | |
| 1607 | /* Search for an anchor volume descriptor pointer */ |
| 1608 | static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock, |
| 1609 | struct kernel_lb_addr *fileset) |
| 1610 | { |
| 1611 | sector_t last[6]; |
| 1612 | int i; |
| 1613 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1614 | int last_count = 0; |
| 1615 | |
| 1616 | /* First try user provided anchor */ |
| 1617 | if (sbi->s_anchor) { |
| 1618 | if (udf_check_anchor_block(sb, sbi->s_anchor, fileset)) |
| 1619 | return lastblock; |
| 1620 | } |
| 1621 | /* |
| 1622 | * according to spec, anchor is in either: |
| 1623 | * block 256 |
| 1624 | * lastblock-256 |
| 1625 | * lastblock |
| 1626 | * however, if the disc isn't closed, it could be 512. |
| 1627 | */ |
| 1628 | if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset)) |
| 1629 | return lastblock; |
| 1630 | /* |
| 1631 | * The trouble is which block is the last one. Drives often misreport |
| 1632 | * this so we try various possibilities. |
| 1633 | */ |
| 1634 | last[last_count++] = lastblock; |
| 1635 | if (lastblock >= 1) |
| 1636 | last[last_count++] = lastblock - 1; |
| 1637 | last[last_count++] = lastblock + 1; |
| 1638 | if (lastblock >= 2) |
| 1639 | last[last_count++] = lastblock - 2; |
| 1640 | if (lastblock >= 150) |
| 1641 | last[last_count++] = lastblock - 150; |
| 1642 | if (lastblock >= 152) |
| 1643 | last[last_count++] = lastblock - 152; |
| 1644 | |
| 1645 | for (i = 0; i < last_count; i++) { |
| 1646 | if (last[i] >= sb->s_bdev->bd_inode->i_size >> |
| 1647 | sb->s_blocksize_bits) |
| 1648 | continue; |
| 1649 | if (udf_check_anchor_block(sb, last[i], fileset)) |
| 1650 | return last[i]; |
| 1651 | if (last[i] < 256) |
| 1652 | continue; |
| 1653 | if (udf_check_anchor_block(sb, last[i] - 256, fileset)) |
| 1654 | return last[i]; |
| 1655 | } |
| 1656 | |
| 1657 | /* Finally try block 512 in case media is open */ |
| 1658 | if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset)) |
| 1659 | return last[0]; |
| 1660 | return 0; |
| 1661 | } |
| 1662 | |
| 1663 | /* |
| 1664 | * Find an anchor volume descriptor and load Volume Descriptor Sequence from |
| 1665 | * area specified by it. The function expects sbi->s_lastblock to be the last |
| 1666 | * block on the media. |
| 1667 | * |
| 1668 | * Return 1 if ok, 0 if not found. |
| 1669 | * |
| 1670 | */ |
| 1671 | static int udf_find_anchor(struct super_block *sb, |
| 1672 | struct kernel_lb_addr *fileset) |
| 1673 | { |
| 1674 | sector_t lastblock; |
| 1675 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1676 | |
| 1677 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); |
| 1678 | if (lastblock) |
| 1679 | goto out; |
| 1680 | |
| 1681 | /* No anchor found? Try VARCONV conversion of block numbers */ |
| 1682 | UDF_SET_FLAG(sb, UDF_FLAG_VARCONV); |
| 1683 | /* Firstly, we try to not convert number of the last block */ |
| 1684 | lastblock = udf_scan_anchors(sb, |
| 1685 | udf_variable_to_fixed(sbi->s_last_block), |
| 1686 | fileset); |
| 1687 | if (lastblock) |
| 1688 | goto out; |
| 1689 | |
| 1690 | /* Secondly, we try with converted number of the last block */ |
| 1691 | lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset); |
| 1692 | if (!lastblock) { |
| 1693 | /* VARCONV didn't help. Clear it. */ |
| 1694 | UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV); |
| 1695 | return 0; |
| 1696 | } |
| 1697 | out: |
| 1698 | sbi->s_last_block = lastblock; |
| 1699 | return 1; |
| 1700 | } |
| 1701 | |
| 1702 | /* |
| 1703 | * Check Volume Structure Descriptor, find Anchor block and load Volume |
| 1704 | * Descriptor Sequence |
| 1705 | */ |
| 1706 | static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt, |
| 1707 | int silent, struct kernel_lb_addr *fileset) |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 1708 | { |
| 1709 | struct udf_sb_info *sbi = UDF_SB(sb); |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1710 | loff_t nsr_off; |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 1711 | |
| 1712 | if (!sb_set_blocksize(sb, uopt->blocksize)) { |
| 1713 | if (!silent) |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1714 | udf_warn(sb, "Bad block size\n"); |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 1715 | return 0; |
| 1716 | } |
| 1717 | sbi->s_last_block = uopt->lastblock; |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1718 | if (!uopt->novrs) { |
| 1719 | /* Check that it is NSR02 compliant */ |
| 1720 | nsr_off = udf_check_vsd(sb); |
| 1721 | if (!nsr_off) { |
| 1722 | if (!silent) |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1723 | udf_warn(sb, "No VRS found\n"); |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1724 | return 0; |
| 1725 | } |
| 1726 | if (nsr_off == -1) |
Joe Perches | a983f36 | 2011-10-10 01:08:07 -0700 | [diff] [blame] | 1727 | 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] | 1728 | if (!sbi->s_last_block) |
| 1729 | sbi->s_last_block = udf_get_last_block(sb); |
| 1730 | } else { |
| 1731 | udf_debug("Validity check skipped because of novrs option\n"); |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 1732 | } |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1733 | |
| 1734 | /* Look for anchor block and load Volume Descriptor Sequence */ |
| 1735 | sbi->s_anchor = uopt->anchor; |
| 1736 | if (!udf_find_anchor(sb, fileset)) { |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 1737 | if (!silent) |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1738 | udf_warn(sb, "No anchor found\n"); |
Clemens Ladisch | 1197e4d | 2009-03-11 15:57:47 +0100 | [diff] [blame] | 1739 | return 0; |
| 1740 | } |
| 1741 | return 1; |
| 1742 | } |
| 1743 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1744 | static void udf_open_lvid(struct super_block *sb) |
| 1745 | { |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1746 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1747 | struct buffer_head *bh = sbi->s_lvid_bh; |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1748 | struct logicalVolIntegrityDesc *lvid; |
| 1749 | struct logicalVolIntegrityDescImpUse *lvidiu; |
Jan Kara | 146bca7 | 2009-03-16 18:27:37 +0100 | [diff] [blame] | 1750 | |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1751 | if (!bh) |
| 1752 | return; |
Jan Kara | 949f4a7 | 2010-10-20 18:49:20 +0200 | [diff] [blame] | 1753 | |
| 1754 | mutex_lock(&sbi->s_alloc_mutex); |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1755 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
| 1756 | lvidiu = udf_sb_lvidiu(sbi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1758 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
| 1759 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; |
| 1760 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, |
| 1761 | CURRENT_TIME); |
Jan Kara | 146bca7 | 2009-03-16 18:27:37 +0100 | [diff] [blame] | 1762 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1764 | lvid->descTag.descCRC = cpu_to_le16( |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1765 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 1766 | le16_to_cpu(lvid->descTag.descCRCLength))); |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1767 | |
| 1768 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); |
| 1769 | mark_buffer_dirty(bh); |
Jan Kara | 146bca7 | 2009-03-16 18:27:37 +0100 | [diff] [blame] | 1770 | sbi->s_lvid_dirty = 0; |
Jan Kara | 949f4a7 | 2010-10-20 18:49:20 +0200 | [diff] [blame] | 1771 | mutex_unlock(&sbi->s_alloc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | } |
| 1773 | |
| 1774 | static void udf_close_lvid(struct super_block *sb) |
| 1775 | { |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1776 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1777 | struct buffer_head *bh = sbi->s_lvid_bh; |
| 1778 | struct logicalVolIntegrityDesc *lvid; |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1779 | struct logicalVolIntegrityDescImpUse *lvidiu; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1780 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1781 | if (!bh) |
| 1782 | return; |
| 1783 | |
Jan Kara | 949f4a7 | 2010-10-20 18:49:20 +0200 | [diff] [blame] | 1784 | mutex_lock(&sbi->s_alloc_mutex); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1785 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1786 | lvidiu = udf_sb_lvidiu(sbi); |
| 1787 | lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; |
| 1788 | lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX; |
| 1789 | udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME); |
| 1790 | if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev)) |
| 1791 | lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION); |
| 1792 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev)) |
| 1793 | lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev); |
| 1794 | if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev)) |
| 1795 | lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev); |
| 1796 | lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1797 | |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1798 | lvid->descTag.descCRC = cpu_to_le16( |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1799 | crc_itu_t(0, (char *)lvid + sizeof(struct tag), |
Bob Copeland | f845fce | 2008-04-17 09:47:48 +0200 | [diff] [blame] | 1800 | le16_to_cpu(lvid->descTag.descCRCLength))); |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1801 | |
| 1802 | lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); |
Jan Kara | 853a0c2 | 2011-12-23 11:53:07 +0100 | [diff] [blame] | 1803 | /* |
| 1804 | * We set buffer uptodate unconditionally here to avoid spurious |
| 1805 | * warnings from mark_buffer_dirty() when previous EIO has marked |
| 1806 | * the buffer as !uptodate |
| 1807 | */ |
| 1808 | set_buffer_uptodate(bh); |
Marcin Slusarz | 165923f | 2008-02-10 11:33:08 +0100 | [diff] [blame] | 1809 | mark_buffer_dirty(bh); |
Jan Kara | 146bca7 | 2009-03-16 18:27:37 +0100 | [diff] [blame] | 1810 | sbi->s_lvid_dirty = 0; |
Jan Kara | 949f4a7 | 2010-10-20 18:49:20 +0200 | [diff] [blame] | 1811 | mutex_unlock(&sbi->s_alloc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | } |
| 1813 | |
Jan Kara | d664b6a | 2010-10-20 18:28:46 +0200 | [diff] [blame] | 1814 | u64 lvid_get_unique_id(struct super_block *sb) |
| 1815 | { |
| 1816 | struct buffer_head *bh; |
| 1817 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 1818 | struct logicalVolIntegrityDesc *lvid; |
| 1819 | struct logicalVolHeaderDesc *lvhd; |
| 1820 | u64 uniqueID; |
| 1821 | u64 ret; |
| 1822 | |
| 1823 | bh = sbi->s_lvid_bh; |
| 1824 | if (!bh) |
| 1825 | return 0; |
| 1826 | |
| 1827 | lvid = (struct logicalVolIntegrityDesc *)bh->b_data; |
| 1828 | lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; |
| 1829 | |
| 1830 | mutex_lock(&sbi->s_alloc_mutex); |
| 1831 | ret = uniqueID = le64_to_cpu(lvhd->uniqueID); |
| 1832 | if (!(++uniqueID & 0xFFFFFFFF)) |
| 1833 | uniqueID += 16; |
| 1834 | lvhd->uniqueID = cpu_to_le64(uniqueID); |
| 1835 | mutex_unlock(&sbi->s_alloc_mutex); |
| 1836 | mark_buffer_dirty(bh); |
| 1837 | |
| 1838 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | } |
| 1840 | |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 1841 | static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) |
| 1842 | { |
| 1843 | int i; |
| 1844 | int nr_groups = bitmap->s_nr_groups; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1845 | int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * |
| 1846 | nr_groups); |
Marcin Slusarz | 66e1da3 | 2008-02-08 04:20:33 -0800 | [diff] [blame] | 1847 | |
| 1848 | for (i = 0; i < nr_groups; i++) |
| 1849 | if (bitmap->s_block_bitmap[i]) |
| 1850 | brelse(bitmap->s_block_bitmap[i]); |
| 1851 | |
| 1852 | if (size <= PAGE_SIZE) |
| 1853 | kfree(bitmap); |
| 1854 | else |
| 1855 | vfree(bitmap); |
| 1856 | } |
| 1857 | |
Jan Kara | 2e0838f | 2008-04-01 18:08:51 +0200 | [diff] [blame] | 1858 | static void udf_free_partition(struct udf_part_map *map) |
| 1859 | { |
| 1860 | int i; |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1861 | struct udf_meta_data *mdata; |
Jan Kara | 2e0838f | 2008-04-01 18:08:51 +0200 | [diff] [blame] | 1862 | |
| 1863 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) |
| 1864 | iput(map->s_uspace.s_table); |
| 1865 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) |
| 1866 | iput(map->s_fspace.s_table); |
| 1867 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) |
| 1868 | udf_sb_free_bitmap(map->s_uspace.s_bitmap); |
| 1869 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) |
| 1870 | udf_sb_free_bitmap(map->s_fspace.s_bitmap); |
| 1871 | if (map->s_partition_type == UDF_SPARABLE_MAP15) |
| 1872 | for (i = 0; i < 4; i++) |
| 1873 | brelse(map->s_type_specific.s_sparing.s_spar_map[i]); |
Jan Kara | bfb257a | 2008-04-08 20:37:21 +0200 | [diff] [blame] | 1874 | else if (map->s_partition_type == UDF_METADATA_MAP25) { |
| 1875 | mdata = &map->s_type_specific.s_metadata; |
| 1876 | iput(mdata->s_metadata_fe); |
| 1877 | mdata->s_metadata_fe = NULL; |
| 1878 | |
| 1879 | iput(mdata->s_mirror_fe); |
| 1880 | mdata->s_mirror_fe = NULL; |
| 1881 | |
| 1882 | iput(mdata->s_bitmap_fe); |
| 1883 | mdata->s_bitmap_fe = NULL; |
| 1884 | } |
Jan Kara | 2e0838f | 2008-04-01 18:08:51 +0200 | [diff] [blame] | 1885 | } |
| 1886 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | static int udf_fill_super(struct super_block *sb, void *options, int silent) |
| 1888 | { |
| 1889 | int i; |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1890 | int ret; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1891 | struct inode *inode = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1892 | struct udf_options uopt; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 1893 | struct kernel_lb_addr rootdir, fileset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1894 | struct udf_sb_info *sbi; |
| 1895 | |
| 1896 | uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); |
| 1897 | uopt.uid = -1; |
| 1898 | uopt.gid = -1; |
| 1899 | uopt.umask = 0; |
Marcin Slusarz | 87bc730 | 2008-12-02 13:40:11 +0100 | [diff] [blame] | 1900 | uopt.fmode = UDF_INVALID_MODE; |
| 1901 | uopt.dmode = UDF_INVALID_MODE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1902 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1903 | sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); |
Alessio Igor Bogani | 9db9f9e | 2010-11-16 18:40:49 +0100 | [diff] [blame] | 1904 | if (!sbi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | return -ENOMEM; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 1906 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1907 | sb->s_fs_info = sbi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | |
Ingo Molnar | 1e7933d | 2006-03-23 03:00:44 -0800 | [diff] [blame] | 1909 | mutex_init(&sbi->s_alloc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | |
Miklos Szeredi | 6da8089 | 2008-02-08 04:21:50 -0800 | [diff] [blame] | 1911 | if (!udf_parse_options((char *)options, &uopt, false)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1912 | goto error_out; |
| 1913 | |
| 1914 | if (uopt.flags & (1 << UDF_FLAG_UTF8) && |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1915 | uopt.flags & (1 << UDF_FLAG_NLS_MAP)) { |
Joe Perches | 8076c36 | 2011-10-10 01:08:03 -0700 | [diff] [blame] | 1916 | udf_err(sb, "utf8 cannot be combined with iocharset\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1917 | goto error_out; |
| 1918 | } |
| 1919 | #ifdef CONFIG_UDF_NLS |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1920 | if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1921 | uopt.nls_map = load_nls_default(); |
| 1922 | if (!uopt.nls_map) |
| 1923 | uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP); |
| 1924 | else |
| 1925 | udf_debug("Using default NLS map\n"); |
| 1926 | } |
| 1927 | #endif |
| 1928 | if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP))) |
| 1929 | uopt.flags |= (1 << UDF_FLAG_UTF8); |
| 1930 | |
| 1931 | fileset.logicalBlockNum = 0xFFFFFFFF; |
| 1932 | fileset.partitionReferenceNum = 0xFFFF; |
| 1933 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1934 | sbi->s_flags = uopt.flags; |
| 1935 | sbi->s_uid = uopt.uid; |
| 1936 | sbi->s_gid = uopt.gid; |
| 1937 | sbi->s_umask = uopt.umask; |
Marcin Slusarz | 7ac9bcd | 2008-11-16 20:52:19 +0100 | [diff] [blame] | 1938 | sbi->s_fmode = uopt.fmode; |
| 1939 | sbi->s_dmode = uopt.dmode; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1940 | sbi->s_nls_map = uopt.nls_map; |
Jan Kara | c03cad2 | 2010-10-20 22:17:28 +0200 | [diff] [blame] | 1941 | rwlock_init(&sbi->s_cred_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1943 | if (uopt.session == 0xFFFFFFFF) |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1944 | sbi->s_session = udf_get_last_session(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1945 | else |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1946 | sbi->s_session = uopt.session; |
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 | udf_debug("Multi-session=%d\n", sbi->s_session); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1949 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | /* Fill in the rest of the superblock */ |
| 1951 | sb->s_op = &udf_sb_ops; |
Rasmus Rohde | 221e583 | 2008-04-30 17:22:06 +0200 | [diff] [blame] | 1952 | sb->s_export_op = &udf_export_ops; |
Christoph Hellwig | 123e9ca | 2010-05-19 07:16:44 -0400 | [diff] [blame] | 1953 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1954 | sb->s_dirt = 0; |
| 1955 | sb->s_magic = UDF_SUPER_MAGIC; |
| 1956 | sb->s_time_gran = 1000; |
| 1957 | |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1958 | if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) { |
| 1959 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
| 1960 | } else { |
Martin K. Petersen | e1defc4 | 2009-05-22 17:17:49 -0400 | [diff] [blame] | 1961 | uopt.blocksize = bdev_logical_block_size(sb->s_bdev); |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1962 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
| 1963 | if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) { |
| 1964 | if (!silent) |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1965 | pr_notice("Rescanning with blocksize %d\n", |
| 1966 | UDF_DEFAULT_BLOCKSIZE); |
Jan Kara | 4034600 | 2009-03-19 16:21:38 +0100 | [diff] [blame] | 1967 | uopt.blocksize = UDF_DEFAULT_BLOCKSIZE; |
| 1968 | ret = udf_load_vrs(sb, &uopt, silent, &fileset); |
| 1969 | } |
| 1970 | } |
| 1971 | if (!ret) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1972 | udf_warn(sb, "No partition found (1)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | goto error_out; |
| 1974 | } |
| 1975 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1976 | udf_debug("Lastblock=%d\n", sbi->s_last_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1978 | if (sbi->s_lvid_bh) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1979 | struct logicalVolIntegrityDescImpUse *lvidiu = |
| 1980 | udf_sb_lvidiu(sbi); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1981 | uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev); |
| 1982 | uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev); |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1983 | /* uint16_t maxUDFWriteRev = |
| 1984 | le16_to_cpu(lvidiu->maxUDFWriteRev); */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1985 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 1986 | if (minUDFReadRev > UDF_MAX_READ_VERSION) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 1987 | udf_err(sb, "minUDFReadRev=%x (max is %x)\n", |
| 1988 | le16_to_cpu(lvidiu->minUDFReadRev), |
| 1989 | UDF_MAX_READ_VERSION); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1990 | goto error_out; |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 1991 | } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | sb->s_flags |= MS_RDONLY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1993 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 1994 | sbi->s_udfrev = minUDFWriteRev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1995 | |
| 1996 | if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE) |
| 1997 | UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE); |
| 1998 | if (minUDFReadRev >= UDF_VERS_USE_STREAMS) |
| 1999 | UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS); |
| 2000 | } |
| 2001 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2002 | if (!sbi->s_partitions) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2003 | udf_warn(sb, "No partition found (2)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2004 | goto error_out; |
| 2005 | } |
| 2006 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2007 | if (sbi->s_partmaps[sbi->s_partition].s_partition_flags & |
| 2008 | UDF_PART_FLAG_READ_ONLY) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2009 | pr_notice("Partition marked readonly; forcing readonly mount\n"); |
Eric Sandeen | 39b3f6d | 2006-09-29 01:59:41 -0700 | [diff] [blame] | 2010 | sb->s_flags |= MS_RDONLY; |
Peter Osterlund | c1a26e7 | 2006-10-05 21:17:50 +0200 | [diff] [blame] | 2011 | } |
Eric Sandeen | 39b3f6d | 2006-09-29 01:59:41 -0700 | [diff] [blame] | 2012 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2013 | if (udf_find_fileset(sb, &fileset, &rootdir)) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2014 | udf_warn(sb, "No fileset found\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2015 | goto error_out; |
| 2016 | } |
| 2017 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2018 | if (!silent) { |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 2019 | struct timestamp ts; |
Marcin Slusarz | 5677480 | 2008-02-10 11:25:31 +0100 | [diff] [blame] | 2020 | udf_time_to_disk_stamp(&ts, sbi->s_record_time); |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2021 | udf_info("Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n", |
| 2022 | sbi->s_volume_ident, |
| 2023 | le16_to_cpu(ts.year), ts.month, ts.day, |
Marcin Slusarz | 5677480 | 2008-02-10 11:25:31 +0100 | [diff] [blame] | 2024 | ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2025 | } |
| 2026 | if (!(sb->s_flags & MS_RDONLY)) |
| 2027 | udf_open_lvid(sb); |
| 2028 | |
| 2029 | /* Assign the root inode */ |
| 2030 | /* assign inodes by physical block number */ |
| 2031 | /* perhaps it's not extensible enough, but for now ... */ |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 2032 | inode = udf_iget(sb, &rootdir); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2033 | if (!inode) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2034 | udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n", |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2035 | rootdir.logicalBlockNum, rootdir.partitionReferenceNum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | goto error_out; |
| 2037 | } |
| 2038 | |
| 2039 | /* Allocate a dentry for the root inode */ |
Al Viro | 48fde70 | 2012-01-08 22:15:13 -0500 | [diff] [blame^] | 2040 | sb->s_root = d_make_root(inode); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2041 | if (!sb->s_root) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2042 | udf_err(sb, "Couldn't allocate root dentry\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2043 | goto error_out; |
| 2044 | } |
Jan Kara | 31170b6 | 2007-05-08 00:35:21 -0700 | [diff] [blame] | 2045 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
Al Viro | 8de5277 | 2012-02-06 12:45:27 -0500 | [diff] [blame] | 2046 | sb->s_max_links = UDF_MAX_LINKS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2047 | return 0; |
| 2048 | |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2049 | error_out: |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2050 | if (sbi->s_vat_inode) |
| 2051 | iput(sbi->s_vat_inode); |
Jan Kara | 2e0838f | 2008-04-01 18:08:51 +0200 | [diff] [blame] | 2052 | if (sbi->s_partitions) |
| 2053 | for (i = 0; i < sbi->s_partitions; i++) |
| 2054 | udf_free_partition(&sbi->s_partmaps[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2055 | #ifdef CONFIG_UDF_NLS |
| 2056 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2057 | unload_nls(sbi->s_nls_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | #endif |
| 2059 | if (!(sb->s_flags & MS_RDONLY)) |
| 2060 | udf_close_lvid(sb); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2061 | brelse(sbi->s_lvid_bh); |
| 2062 | |
| 2063 | kfree(sbi->s_partmaps); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | kfree(sbi); |
| 2065 | sb->s_fs_info = NULL; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2066 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | return -EINVAL; |
| 2068 | } |
| 2069 | |
Joe Perches | 8076c36 | 2011-10-10 01:08:03 -0700 | [diff] [blame] | 2070 | void _udf_err(struct super_block *sb, const char *function, |
| 2071 | const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2072 | { |
Joe Perches | c2bff36 | 2011-10-10 01:08:06 -0700 | [diff] [blame] | 2073 | struct va_format vaf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2074 | va_list args; |
| 2075 | |
Joe Perches | c2bff36 | 2011-10-10 01:08:06 -0700 | [diff] [blame] | 2076 | /* mark sb error */ |
| 2077 | if (!(sb->s_flags & MS_RDONLY)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | sb->s_dirt = 1; |
Joe Perches | c2bff36 | 2011-10-10 01:08:06 -0700 | [diff] [blame] | 2079 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2080 | va_start(args, fmt); |
Joe Perches | c2bff36 | 2011-10-10 01:08:06 -0700 | [diff] [blame] | 2081 | |
| 2082 | vaf.fmt = fmt; |
| 2083 | vaf.va = &args; |
| 2084 | |
| 2085 | pr_err("error (device %s): %s: %pV", sb->s_id, function, &vaf); |
| 2086 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2087 | va_end(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | } |
| 2089 | |
Joe Perches | a40ecd7 | 2011-10-10 01:08:04 -0700 | [diff] [blame] | 2090 | void _udf_warn(struct super_block *sb, const char *function, |
| 2091 | const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2092 | { |
Joe Perches | c2bff36 | 2011-10-10 01:08:06 -0700 | [diff] [blame] | 2093 | struct va_format vaf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2094 | va_list args; |
| 2095 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2096 | va_start(args, fmt); |
Joe Perches | c2bff36 | 2011-10-10 01:08:06 -0700 | [diff] [blame] | 2097 | |
| 2098 | vaf.fmt = fmt; |
| 2099 | vaf.va = &args; |
| 2100 | |
| 2101 | pr_warn("warning (device %s): %s: %pV", sb->s_id, function, &vaf); |
| 2102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | va_end(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | } |
| 2105 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2106 | static void udf_put_super(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2107 | { |
| 2108 | int i; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2109 | struct udf_sb_info *sbi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2110 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2111 | sbi = UDF_SB(sb); |
Christoph Hellwig | 6cfd014 | 2009-05-05 15:40:36 +0200 | [diff] [blame] | 2112 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2113 | if (sbi->s_vat_inode) |
| 2114 | iput(sbi->s_vat_inode); |
Jan Kara | 2e0838f | 2008-04-01 18:08:51 +0200 | [diff] [blame] | 2115 | if (sbi->s_partitions) |
| 2116 | for (i = 0; i < sbi->s_partitions; i++) |
| 2117 | udf_free_partition(&sbi->s_partmaps[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2118 | #ifdef CONFIG_UDF_NLS |
| 2119 | if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2120 | unload_nls(sbi->s_nls_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2121 | #endif |
| 2122 | if (!(sb->s_flags & MS_RDONLY)) |
| 2123 | udf_close_lvid(sb); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2124 | brelse(sbi->s_lvid_bh); |
| 2125 | kfree(sbi->s_partmaps); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2126 | kfree(sb->s_fs_info); |
| 2127 | sb->s_fs_info = NULL; |
| 2128 | } |
| 2129 | |
Jan Kara | 146bca7 | 2009-03-16 18:27:37 +0100 | [diff] [blame] | 2130 | static int udf_sync_fs(struct super_block *sb, int wait) |
| 2131 | { |
| 2132 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 2133 | |
| 2134 | mutex_lock(&sbi->s_alloc_mutex); |
| 2135 | if (sbi->s_lvid_dirty) { |
| 2136 | /* |
| 2137 | * Blockdevice will be synced later so we don't have to submit |
| 2138 | * the buffer for IO |
| 2139 | */ |
| 2140 | mark_buffer_dirty(sbi->s_lvid_bh); |
| 2141 | sb->s_dirt = 0; |
| 2142 | sbi->s_lvid_dirty = 0; |
| 2143 | } |
| 2144 | mutex_unlock(&sbi->s_alloc_mutex); |
| 2145 | |
| 2146 | return 0; |
| 2147 | } |
| 2148 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2149 | static int udf_statfs(struct dentry *dentry, struct kstatfs *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2150 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 2151 | struct super_block *sb = dentry->d_sb; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2152 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 2153 | struct logicalVolIntegrityDescImpUse *lvidiu; |
Coly Li | 557f5a1 | 2009-01-20 01:36:55 +0800 | [diff] [blame] | 2154 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2155 | |
| 2156 | if (sbi->s_lvid_bh != NULL) |
| 2157 | lvidiu = udf_sb_lvidiu(sbi); |
| 2158 | else |
| 2159 | lvidiu = NULL; |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 2160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2161 | buf->f_type = UDF_SUPER_MAGIC; |
| 2162 | buf->f_bsize = sb->s_blocksize; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2163 | buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | buf->f_bfree = udf_count_free(sb); |
| 2165 | buf->f_bavail = buf->f_bfree; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2166 | buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) + |
| 2167 | le32_to_cpu(lvidiu->numDirs)) : 0) |
| 2168 | + buf->f_bfree; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2169 | buf->f_ffree = buf->f_bfree; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2170 | buf->f_namelen = UDF_NAME_LEN - 2; |
Coly Li | 557f5a1 | 2009-01-20 01:36:55 +0800 | [diff] [blame] | 2171 | buf->f_fsid.val[0] = (u32)id; |
| 2172 | buf->f_fsid.val[1] = (u32)(id >> 32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2173 | |
| 2174 | return 0; |
| 2175 | } |
| 2176 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2177 | static unsigned int udf_count_free_bitmap(struct super_block *sb, |
| 2178 | struct udf_bitmap *bitmap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2179 | { |
| 2180 | struct buffer_head *bh = NULL; |
| 2181 | unsigned int accum = 0; |
| 2182 | int index; |
| 2183 | int block = 0, newblock; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 2184 | struct kernel_lb_addr loc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | uint32_t bytes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2186 | uint8_t *ptr; |
| 2187 | uint16_t ident; |
| 2188 | struct spaceBitmapDesc *bm; |
| 2189 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2190 | loc.logicalBlockNum = bitmap->s_extPosition; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2191 | loc.partitionReferenceNum = UDF_SB(sb)->s_partition; |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 2192 | bh = udf_read_ptagged(sb, &loc, 0, &ident); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2194 | if (!bh) { |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2195 | udf_err(sb, "udf_count_free failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | goto out; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2197 | } else if (ident != TAG_IDENT_SBD) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2198 | brelse(bh); |
Joe Perches | 78ace70 | 2011-10-10 01:08:05 -0700 | [diff] [blame] | 2199 | udf_err(sb, "udf_count_free failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | goto out; |
| 2201 | } |
| 2202 | |
| 2203 | bm = (struct spaceBitmapDesc *)bh->b_data; |
| 2204 | bytes = le32_to_cpu(bm->numOfBytes); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2205 | index = sizeof(struct spaceBitmapDesc); /* offset in first block only */ |
| 2206 | ptr = (uint8_t *)bh->b_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2207 | |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2208 | while (bytes > 0) { |
Marcin Slusarz | 01b954a | 2008-02-02 22:37:07 +0100 | [diff] [blame] | 2209 | u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index); |
| 2210 | accum += bitmap_weight((const unsigned long *)(ptr + index), |
| 2211 | cur_bytes * 8); |
| 2212 | bytes -= cur_bytes; |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2213 | if (bytes) { |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2214 | brelse(bh); |
Pekka Enberg | 97e961f | 2008-10-15 12:29:03 +0200 | [diff] [blame] | 2215 | newblock = udf_get_lb_pblock(sb, &loc, ++block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2216 | bh = udf_tread(sb, newblock); |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2217 | if (!bh) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2218 | udf_debug("read failed\n"); |
| 2219 | goto out; |
| 2220 | } |
| 2221 | index = 0; |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2222 | ptr = (uint8_t *)bh->b_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | } |
| 2224 | } |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2225 | brelse(bh); |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2226 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2227 | return accum; |
| 2228 | } |
| 2229 | |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2230 | static unsigned int udf_count_free_table(struct super_block *sb, |
| 2231 | struct inode *table) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2232 | { |
| 2233 | unsigned int accum = 0; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2234 | uint32_t elen; |
Pekka Enberg | 5ca4e4b | 2008-10-15 12:28:03 +0200 | [diff] [blame] | 2235 | struct kernel_lb_addr eloc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | int8_t etype; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2237 | struct extent_position epos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2238 | |
Jan Kara | d1668fe | 2010-10-20 23:24:12 +0200 | [diff] [blame] | 2239 | mutex_lock(&UDF_SB(sb)->s_alloc_mutex); |
Marcin Slusarz | c0b3443 | 2008-02-08 04:20:42 -0800 | [diff] [blame] | 2240 | epos.block = UDF_I(table)->i_location; |
Jan Kara | ff116fc | 2007-05-08 00:35:14 -0700 | [diff] [blame] | 2241 | epos.offset = sizeof(struct unallocSpaceEntry); |
| 2242 | epos.bh = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2243 | |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 2244 | while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2245 | accum += (elen >> table->i_sb->s_blocksize_bits); |
Marcin Slusarz | 3a71fc5 | 2008-02-08 04:20:28 -0800 | [diff] [blame] | 2246 | |
Jan Kara | 3bf25cb | 2007-05-08 00:35:16 -0700 | [diff] [blame] | 2247 | brelse(epos.bh); |
Jan Kara | d1668fe | 2010-10-20 23:24:12 +0200 | [diff] [blame] | 2248 | mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2249 | |
| 2250 | return accum; |
| 2251 | } |
Cyrill Gorcunov | cb00ea3 | 2007-07-19 01:47:43 -0700 | [diff] [blame] | 2252 | |
| 2253 | static unsigned int udf_count_free(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | { |
| 2255 | unsigned int accum = 0; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2256 | struct udf_sb_info *sbi; |
| 2257 | struct udf_part_map *map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2258 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2259 | sbi = UDF_SB(sb); |
| 2260 | if (sbi->s_lvid_bh) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2261 | struct logicalVolIntegrityDesc *lvid = |
| 2262 | (struct logicalVolIntegrityDesc *) |
| 2263 | sbi->s_lvid_bh->b_data; |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2264 | if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) { |
Marcin Slusarz | 4b11111 | 2008-02-08 04:20:36 -0800 | [diff] [blame] | 2265 | accum = le32_to_cpu( |
| 2266 | lvid->freeSpaceTable[sbi->s_partition]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2267 | if (accum == 0xFFFFFFFF) |
| 2268 | accum = 0; |
| 2269 | } |
| 2270 | } |
| 2271 | |
| 2272 | if (accum) |
| 2273 | return accum; |
| 2274 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2275 | map = &sbi->s_partmaps[sbi->s_partition]; |
| 2276 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2277 | accum += udf_count_free_bitmap(sb, |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2278 | map->s_uspace.s_bitmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2279 | } |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2280 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2281 | accum += udf_count_free_bitmap(sb, |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2282 | map->s_fspace.s_bitmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | } |
| 2284 | if (accum) |
| 2285 | return accum; |
| 2286 | |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2287 | if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2288 | accum += udf_count_free_table(sb, |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2289 | map->s_uspace.s_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | } |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2291 | if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) { |
Cyrill Gorcunov | 28de794 | 2007-07-21 04:37:18 -0700 | [diff] [blame] | 2292 | accum += udf_count_free_table(sb, |
Marcin Slusarz | 6c79e98 | 2008-02-08 04:20:30 -0800 | [diff] [blame] | 2293 | map->s_fspace.s_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2294 | } |
| 2295 | |
| 2296 | return accum; |
| 2297 | } |