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When dlm_lockspace_release() is passed DLM_RELEASE_RECOVER, it tells the dlm to handle the release/leave as if the node had failed, i.e. perform recovery steps for a failed node, like recover_slot(). When DLM_RELEASE_RECOVER is set: - dlm_release_lockspace() includes RELEASE_RECOVER=1 in the OFFLINE uevent sent to userspace. - userspace/dlm_controld sends a message to all lockspace members indicating that the subsequent node removal should be handled as if the node had failed. - when dlm_controld on all nodes receives the new message, it sets the release_recover configfs entry to 1 for the node. - when the dlm/kernel next performs recovery and removes the node, it will see that release_recover has been set, and will perform recovery steps for the node as if it had failed, e.g. the recover_slot() callback is called to notify the fs. Signed-off-by: Alexander Aring <aahringo@redhat.com> Signed-off-by: David Teigland <teigland@redhat.com>