extent counting fun

[Eric Sandeen <sandeen@redhat.com>]

[root@host ~]# filefrag -B /mnt/test/file
/mnt/test/file: 34 extents found
[root@host ~]# filefrag /mnt/test/file
/mnt/test/file: 1058 extents found, perfection would be 1 extent

Hum, is it 34 or 1058? :)

Older filefrag counted contiguous metadata as part of a contiguous
extent... newer filefrag works in fiemap query-only mode by default,
and just takes what fiemap tells it.  The inconsistency is weird
though, and led to a Red Hat bug that I'm inclined to NOTABUG... but
do people think this needs to be made any more consistent?

Should we hack ext3_fiemap() to include the checks for contiguous
metadata?  Or was that too shady/clever to start with ...? :)

-Eric