This started of as a patch by Alex Tomas <alex@clusterfs.com> and got an
overhaul by me.  The on-disk structure used is the same as in Alex's
original patch.
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>