e2scrub: create a script to scrub all ext* filesystems

Create an e2scrub_all command to find all ext* filesystems
and run an online scrub against them all.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
4 files changed