| Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1 | // vim: set sw=2 sts=2 : |
| 2 | digraph { |
| 3 | rankdir=BT |
| 4 | bgcolor=white |
| 5 | |
| 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=max |
| 23 | 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=red |
| 39 | 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 | // edges |
| 58 | // -------------------------------------- |
| 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 -> WFBitMapS |
| 69 | WFReportParams -> WFBitMapT |
| 70 | WFBitMapT -> WFSyncUUID [minlen=0.1,constraint=false] |
| 71 | |
| 72 | WFBitMapS -> cluster_resync:S |
| 73 | WFSyncUUID -> cluster_resync:T |
| 74 | |
| 75 | edge [color=green] |
| 76 | cluster_resync:any -> Connected [ label="resnyc done",fontcolor=green ] |
| 77 | |
| 78 | edge [color=red] |
| 79 | WFReportParams -> CommTrouble |
| 80 | Connected -> CommTrouble |
| 81 | cluster_resync:any -> CommTrouble |
| 82 | edge [color=black] |
| 83 | CommTrouble -> Unconnected [label="receiver thread is stopped" ] |
| 84 | |
| 85 | } |