Add I/O statistics to e2fsck

This patch instruments the libext2fs unix I/O manager and adds bytes
read/written and data rate to e2fsck -tt pass/overall timing output.

Signed-off-by: Jim Garlick <garlick@llnl.gov>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
13 files changed