rbdtool import should use fiemap
At least try to use fiemap where applicable for sparse files.
#6 Updated by Sage Weil almost 10 years ago
Merged by 58394828a01950d7b26430d61d32df91df5a5fb1, bringing it in line with the objecter changes over the last few months.
Cleaned up some stuff too: the header is included (in case the system doesn't have it), and filestore autodetects whether the ioctl works.