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