misc: add plausibility checks to debugfs/tune2fs/dumpe2fs/e2fsck

If any of these utilities detect a bad superblock magic, call
check_plausibility to see if blkid can identify the passed-in argument
as something else (xfs, partition, etc.) in the hopes of catching a
user error.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
15 files changed