tree be6ea155fc54c397cb57eb193b81824b37989e56
parent f95a34c66554235b70a681fcd9feebc195f7ec0e
author David Teigland <teigland@redhat.com> 1319135188 -0500
committer David Teigland <teigland@redhat.com> 1325688957 -0600

dlm: add node slots and generation

Slot numbers are assigned to nodes when they join the lockspace.
The slot number chosen is the minimum unused value starting at 1.
Once a node is assigned a slot, that slot number will not change
while the node remains a lockspace member.  If the node leaves
and rejoins it can be assigned a new slot number.

A new generation number is also added to a lockspace.  It is
set and incremented during each recovery along with the slot
collection/assignment.

The slot numbers will be passed to gfs2 which will use them as
journal id's.

Signed-off-by: David Teigland <teigland@redhat.com>