tree dfd6da78d6c18b9261b3c1cb572986ac5c495f66
parent 4092d49f705aa19750c39758fa1be767e162c48d
author Tao Ma <tao.ma@oracle.com> 1199949655 +0800
committer Mark Fasheh <mark.fasheh@oracle.com> 1201302346 -0800

ocfs2/dlm: Clear joining_node on hearbeat node down

Currently the process of dlm join contains 2 steps: query join and assert join.
After query join, the joined node will set its joining_node. So if the joining
node happens to panic before the 2nd step, the joined node will fail to clear
its joining_node flag because that node isn't in the domain map. It at least
cause 2 problems.
1. All the new join request will fail. So no new node can mount the volume.
2. The joined node can't umount the volume since during the umount process it
   has to wait for the joining_node to be unknown. So the umount will be hanged.

The solution is to clear the joining_node before we check the domain map.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>