[Ocfs2-devel] [PATCH] ocfs2/dlm: check lockres owner in handler path

[Wengang Wang]

On 10-11-19 14:56, Wengang Wang wrote:
> We have check lockres owner in handler path because the owner can change
> during that time.
> 
> In case this node is in progress of unmount, it does migrations with
> other node. If one of the migration target get crashed before the
> migration finishes, recovery happens on this lockres. If this node is
> not the (dlm) recovery master, it can lost the ownership.
> On the other hand, in case another node is in progress of migration, and
> this node is not the target. if the node doing unmount crashed,  This
> node can gain the ownership if it becomes the recovery master.
> So we should take care the above cases.
> Also the ownership can move between two other different nodes. We
> don't care that.

With this patch, by not sending request to wrong master node, maybe we can avoid
some "invalid lockres id" problem if not all.

regards,
wengang.