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authorJan Kara <jack@suse.cz>2009-07-14 21:30:23 +0400
committerJan Kara <jack@suse.cz>2009-07-30 19:28:26 +0400
commit4bf17af0dbfe4cf20cb750e22e8e926273e7a7a4 (patch)
tree9d7218df82274d1dd564f3ba06ca8c65a99234c1
parent658874f05d040ca96eb5ba9b1c30ce0ff287d762 (diff)
downloadlinux-4bf17af0dbfe4cf20cb750e22e8e926273e7a7a4.tar.xz
udf: Fix loading of VAT inode when drive wrongly reports number of recorded blocks
VAT inode is located in the last block recorded block of the medium. When the drive errorneously reports number of recorded blocks, we failed to load the VAT inode and thus mount the medium. This patch makes kernel try to read VAT inode from the last block of the device if it is different from the last recorded block. Signed-off-by: Jan Kara <jack@suse.cz>
-rw-r--r--fs/udf/super.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 6832135159b6..9d1b8c2e6c45 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1087,11 +1087,23 @@ static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
struct udf_inode_info *vati;
uint32_t pos;
struct virtualAllocationTable20 *vat20;
+ sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
/* VAT file entry is in the last recorded block */
ino.partitionReferenceNum = type1_index;
ino.logicalBlockNum = sbi->s_last_block - map->s_partition_root;
sbi->s_vat_inode = udf_iget(sb, &ino);
+ if (!sbi->s_vat_inode &&
+ sbi->s_last_block != blocks - 1) {
+ printk(KERN_NOTICE "UDF-fs: Failed to read VAT inode from the"
+ " last recorded block (%lu), retrying with the last "
+ "block of the device (%lu).\n",
+ (unsigned long)sbi->s_last_block,
+ (unsigned long)blocks - 1);
+ ino.partitionReferenceNum = type1_index;
+ ino.logicalBlockNum = blocks - 1 - map->s_partition_root;
+ sbi->s_vat_inode = udf_iget(sb, &ino);
+ }
if (!sbi->s_vat_inode)
return 1;