xfsprogs: report refcount information to userspace [57/62]
Create a new ioctl to report the number of owners of each disk block so
that reflink-aware defraggers can make better decisions about which
extents to target.
This has been running on the djcloud for months with no problems. Enjoy!
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
xfs_io: dump reference count information
Dump refcount info from the kernel so we can prototype a sharing-aware
defrag/fs rearranging tool.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
5 files changed
