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1// vim: set sw=2 sts=2 :2digraph {3 rankdir=BT4 bgcolor=white5 6 node [shape=plaintext]7 node [fontcolor=black]8 9 StandAlone [ style=filled,fillcolor=gray,label=StandAlone ]10 11 node [fontcolor=lightgray]12 13 Unconnected [ label=Unconnected ]14 15 CommTrouble [ shape=record,16 label="{communication loss|{Timeout|BrokenPipe|NetworkFailure}}" ]17 18 node [fontcolor=gray]19 20 subgraph cluster_try_connect {21 label="try to connect, handshake"22 rank=max23 WFConnection [ label=WFConnection ]24 WFReportParams [ label=WFReportParams ]25 }26 27 TearDown [ label=TearDown ]28 29 Connected [ label=Connected,style=filled,fillcolor=green,fontcolor=black ]30 31 node [fontcolor=lightblue]32 33 StartingSyncS [ label=StartingSyncS ]34 StartingSyncT [ label=StartingSyncT ]35 36 subgraph cluster_bitmap_exchange {37 node [fontcolor=red]38 fontcolor=red39 label="new application (WRITE?) requests blocked\lwhile bitmap is exchanged"40 41 WFBitMapT [ label=WFBitMapT ]42 WFSyncUUID [ label=WFSyncUUID ]43 WFBitMapS [ label=WFBitMapS ]44 }45 46 node [fontcolor=blue]47 48 cluster_resync [ shape=record,label="{<any>resynchronisation process running\l'concurrent' application requests allowed|{{<T>PausedSyncT\nSyncTarget}|{<S>PausedSyncS\nSyncSource}}}" ]49 50 node [shape=box,fontcolor=black]51 52 // drbdadm [label="drbdadm connect"]53 // handshake [label="drbd_connect()\ndrbd_do_handshake\ndrbd_sync_handshake() etc."]54 // comm_error [label="communication trouble"]55 56 //57 // edges58 // --------------------------------------59 60 StandAlone -> Unconnected [ label="drbdadm connect" ]61 Unconnected -> StandAlone [ label="drbdadm disconnect\lor serious communication trouble" ]62 Unconnected -> WFConnection [ label="receiver thread is started" ]63 WFConnection -> WFReportParams [ headlabel="accept()\land/or \lconnect()\l" ]64 65 WFReportParams -> StandAlone [ label="during handshake\lpeers do not agree\labout something essential" ]66 WFReportParams -> Connected [ label="data identical\lno sync needed",color=green,fontcolor=green ]67 68 WFReportParams -> WFBitMapS69 WFReportParams -> WFBitMapT70 WFBitMapT -> WFSyncUUID [minlen=0.1,constraint=false]71 72 WFBitMapS -> cluster_resync:S73 WFSyncUUID -> cluster_resync:T74 75 edge [color=green]76 cluster_resync:any -> Connected [ label="resnyc done",fontcolor=green ]77 78 edge [color=red]79 WFReportParams -> CommTrouble80 Connected -> CommTrouble81 cluster_resync:any -> CommTrouble82 edge [color=black]83 CommTrouble -> Unconnected [label="receiver thread is stopped" ]84 85}86