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- // vim: set sw=2 sts=2 :
- digraph {
- rankdir=BT
- bgcolor=white
- node [shape=plaintext]
- node [fontcolor=black]
- StandAlone [ style=filled,fillcolor=gray,label=StandAlone ]
- node [fontcolor=lightgray]
- Unconnected [ label=Unconnected ]
- CommTrouble [ shape=record,
- label="{communication loss|{Timeout|BrokenPipe|NetworkFailure}}" ]
- node [fontcolor=gray]
- subgraph cluster_try_connect {
- label="try to connect, handshake"
- rank=max
- WFConnection [ label=WFConnection ]
- WFReportParams [ label=WFReportParams ]
- }
- TearDown [ label=TearDown ]
- Connected [ label=Connected,style=filled,fillcolor=green,fontcolor=black ]
- node [fontcolor=lightblue]
- StartingSyncS [ label=StartingSyncS ]
- StartingSyncT [ label=StartingSyncT ]
- subgraph cluster_bitmap_exchange {
- node [fontcolor=red]
- fontcolor=red
- label="new application (WRITE?) requests blocked\lwhile bitmap is exchanged"
- WFBitMapT [ label=WFBitMapT ]
- WFSyncUUID [ label=WFSyncUUID ]
- WFBitMapS [ label=WFBitMapS ]
- }
- node [fontcolor=blue]
- cluster_resync [ shape=record,label="{<any>resynchronisation process running\l'concurrent' application requests allowed|{{<T>PausedSyncT\nSyncTarget}|{<S>PausedSyncS\nSyncSource}}}" ]
- node [shape=box,fontcolor=black]
- // drbdadm [label="drbdadm connect"]
- // handshake [label="drbd_connect()\ndrbd_do_handshake\ndrbd_sync_handshake() etc."]
- // comm_error [label="communication trouble"]
- //
- // edges
- // --------------------------------------
- StandAlone -> Unconnected [ label="drbdadm connect" ]
- Unconnected -> StandAlone [ label="drbdadm disconnect\lor serious communication trouble" ]
- Unconnected -> WFConnection [ label="receiver thread is started" ]
- WFConnection -> WFReportParams [ headlabel="accept()\land/or \lconnect()\l" ]
- WFReportParams -> StandAlone [ label="during handshake\lpeers do not agree\labout something essential" ]
- WFReportParams -> Connected [ label="data identical\lno sync needed",color=green,fontcolor=green ]
- WFReportParams -> WFBitMapS
- WFReportParams -> WFBitMapT
- WFBitMapT -> WFSyncUUID [minlen=0.1,constraint=false]
- WFBitMapS -> cluster_resync:S
- WFSyncUUID -> cluster_resync:T
- edge [color=green]
- cluster_resync:any -> Connected [ label="resnyc done",fontcolor=green ]
- edge [color=red]
- WFReportParams -> CommTrouble
- Connected -> CommTrouble
- cluster_resync:any -> CommTrouble
- edge [color=black]
- CommTrouble -> Unconnected [label="receiver thread is stopped" ]
- }
|
