/usr/lib/x86_64-linux-gnu/libgfapi.so is in glusterfs-common 3.4.2-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libgfapi.so.0.0.0
/usr/lib/x86_64-linux-gnu/libgfapi.so.0.0.0