X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=fs%2Fudf%2Fsuper.c;h=1e4543cbcd276decb1b43942e999b9f2f851b145;hb=f8f484d1b6677dd5cd5e7e605db747e8c30bbd47;hp=6832135159b680e8563a9ebadd03ebf19eb8f80c;hpb=e12c4fa377ffda2490476caae17f24daaf9c9bd7;p=~andy%2Flinux

diff --git a/fs/udf/super.c b/fs/udf/super.c
index 6832135159b..1e4543cbcd2 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1078,20 +1078,48 @@ static int udf_fill_partdesc_info(struct super_block *sb,
 	return 0;
 }
 
-static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
+static void udf_find_vat_block(struct super_block *sb, int p_index,
+			       int type1_index, sector_t start_block)
 {
 	struct udf_sb_info *sbi = UDF_SB(sb);
 	struct udf_part_map *map = &sbi->s_partmaps[p_index];
+	sector_t vat_block;
 	struct kernel_lb_addr ino;
+
+	/*
+	 * VAT file entry is in the last recorded block. Some broken disks have
+	 * it a few blocks before so try a bit harder...
+	 */
+	ino.partitionReferenceNum = type1_index;
+	for (vat_block = start_block;
+	     vat_block >= map->s_partition_root &&
+	     vat_block >= start_block - 3 &&
+	     !sbi->s_vat_inode; vat_block--) {
+		ino.logicalBlockNum = vat_block - map->s_partition_root;
+		sbi->s_vat_inode = udf_iget(sb, &ino);
+	}
+}
+
+static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
+{
+	struct udf_sb_info *sbi = UDF_SB(sb);
+	struct udf_part_map *map = &sbi->s_partmaps[p_index];
 	struct buffer_head *bh = NULL;
 	struct udf_inode_info *vati;
 	uint32_t pos;
 	struct virtualAllocationTable20 *vat20;
-
-	/* 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);
+	sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
+
+	udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
+	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);
+		udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
+	}
 	if (!sbi->s_vat_inode)
 		return 1;