e2fsck: verify block bitmap checksum

Check block bitmap checksum and write a new checksum if the
verification fails.  This is ok because e2fsck has already computed
the correct block bitmap.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
3 files changed