From: David Teigland <teigland@redhat.com>
Date: Thu, 20 Oct 2011 18:26:28 +0000 (-0500)
Subject: dlm: add node slots and generation
X-Git-Tag: v3.3-rc1~118^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=757a42719635495779462514458bbfbf12a37dac;p=pandora-kernel.git

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>
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