tree 702ad727e3310bc64b890bbe3195e50c3944370f
parent ca8895d9bb41e743271c42a4438a296de891b73b
author Goldwyn Rodrigues <rgoldwyn@suse.com> 1396158169 -0500
committer Goldwyn Rodrigues <rgoldwyn@suse.com> 1424698211 -0600

Add node recovery callbacks

DLM offers callbacks when a node fails and the lock remastery
is performed:

1. recover_prep: called when DLM discovers a node is down
2. recover_slot: called when DLM identifies the node and recovery
		can start
3. recover_done: called when all nodes have completed recover_slot

recover_slot() and recover_done() are also called when the node joins
initially in order to inform the node with its slot number. These slot
numbers start from one, so we deduct one to make it start with zero
which the cluster-md code uses.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>