Add support for original fallocate

In many cases the simple fallocate call is
a no op (since the file is already not sparse) or
can simply be converted from a sparse to a non-sparse
file if we are fallocating the whole file and keeping
the size.

Signed-off-by: Steven French <smfrench@gmail.com>
This commit is contained in:
Steve French 2014-10-18 17:01:15 -05:00 • committed by Steve French
commit 9ccf321623