mke2fs: complain about creating 64bit filesystems without extents

A 64bit filesystem without extents is not terribly useful, because the
old block map format does not support pointing to high block numbers.
Warn the user who tries to create such an animal.

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