rbd: define rbd_header_name()

Define a new function rbd_header_name(), which allocates and formats
the name of the header object for the rbd device.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2013-04-27 09:59:30 -05:00 • committed by Sage Weil
commit 332bb12db9