Re: [PATCH 13/54] e2fsck: Verify inode bitmap checksum

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On Sat, Mar 10, 2012 at 12:46:57AM -0500, Ted Ts'o wrote:
> 
> This patch just looks wrong.  RO_COMPAT_GDT_CSUM is the old feature,
> and doesn't imply that there will be a checksum in the inode bitmap
> block.  Shouldn't this be RO_COMPAT_METADATA_CSUM?

Correction; the big problem here is that check_inode_bitmap_checksum()
(and in the next e2fsck page, check_block_bitmap_checksum()) are are
doing their thing without actually checking for
RO_COMPAT_METADATA_CSUM).  These code paths shouldn't be getting
activated at all for non-METADATA_CSUM file systems.  But they are.

(And the check_block_bitmap_checksum() function is using
EXT2_BLOCKS_PER_GROUP where it needs to use EXT2_CLUSTERS_PER_GROUP or
it will end up corrupting memory which will cause the bigalloc-related
test f_dup_ba blow up.  But again, this code path shouldn't have been
getting activated in the first place.)

					- Ted
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