linux/Documentation/admin-guide/blockdev/drbd/conn-states-8.dot

digraph conn_states {
	StandAllone  -> WFConnection   [ label = "ioctl_set_net()" ]
	WFConnection -> Unconnected    [ label = "unable to bind()" ]
	WFConnection -> WFReportParams [ label = "in connect() after accept" ]
	WFReportParams -> StandAllone  [ label = "checks in receive_param()" ]
	WFReportParams -> Connected    [ label = "in receive_param()" ]
	WFReportParams -> WFBitMapS    [ label = "sync_handshake()" ]
	WFReportParams -> WFBitMapT    [ label = "sync_handshake()" ]
	WFBitMapS -> SyncSource        [ label = "receive_bitmap()" ]
	WFBitMapT -> SyncTarget        [ label = "receive_bitmap()" ]
	SyncSource -> Connected
	SyncTarget -> Connected
	SyncSource -> PausedSyncS
	SyncTarget -> PausedSyncT
	PausedSyncS -> SyncSource
	PausedSyncT -> SyncTarget
	Connected   -> WFConnection    [ label = "* on network error" ]
}