[PATCH] ext4: allow larger descriptor size

make block group descriptor larger.

Signed-off-by: Alexandre Ratchov <alexandre.ratchov@bull.net>
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 3 deletions

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index c05dc57148bb..d03e7d85a638 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2432,14 +2432,16 @@ static ext4_fsblk_t ext4_get_inode_block(struct super_block *sb,
                 return 0;
         }
 
-        gdp = (struct ext4_group_desc *)bh->b_data;
+        gdp = (struct ext4_group_desc *)((__u8 *)bh->b_data +
+                desc * EXT4_DESC_SIZE(sb));
         /*
          * Figure out the offset within the block group inode table
          */
         offset = ((ino - 1) % EXT4_INODES_PER_GROUP(sb)) *
                 EXT4_INODE_SIZE(sb);
-        block = ext4_inode_table(gdp + desc) +
-                        (offset >> EXT4_BLOCK_SIZE_BITS(sb));
+        block = ext4_inode_table(gdp) + (offset >> EXT4_BLOCK_SIZE_BITS(sb));
+
+
 
         iloc->block_group = block_group;
         iloc->offset = offset & (EXT4_BLOCK_SIZE(sb) - 1);