e2fsck: verify htree root/node checksums

Check htree internal node checksums.  If broken, ask user to clear
the htree index and recreate it later.

[ Move the check for not rehashing the lost+found directory to pass1
  so that we don't end up truncating lost+found when the metadata
  checksum feature is enabled. -- TYT ]

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