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QEMU Machine Protocol Events
============================
ACPI_DEVICE_OST
---------------
Emitted when guest executes ACPI _OST method.
- data: ACPIOSTInfo type as described in qapi-schema.json
{ "event": "ACPI_DEVICE_OST",
"data": { "device": "d1", "slot": "0", "slot-type": "DIMM", "source": 1, "status": 0 } }
BALLOON_CHANGE
--------------
Emitted when the guest changes the actual BALLOON level. This
value is equivalent to the 'actual' field return by the
'query-balloon' command
Data:
- "actual": actual level of the guest memory balloon in bytes (json-number)
Example:
{ "event": "BALLOON_CHANGE",
"data": { "actual": 944766976 },
"timestamp": { "seconds": 1267020223, "microseconds": 435656 } }
Note: this event is rate-limited.
DUMP_COMPLETED
--------------
Emitted when the guest has finished one memory dump.
Data:
- "result": DumpQueryResult type described in qapi-schema.json
- "error": Error message when dump failed. This is only a
human-readable string provided when dump failed. It should not be
parsed in any way (json-string, optional)
Example:
{ "event": "DUMP_COMPLETED",
"data": {"result": {"total": 1090650112, "status": "completed",
"completed": 1090650112} } }
GUEST_PANICKED
--------------
Emitted when guest OS panic is detected.
Data:
- "action": Action that has been taken (json-string, currently always "pause").
Example:
{ "event": "GUEST_PANICKED",
"data": { "action": "pause" } }
MEM_UNPLUG_ERROR
--------------------
Emitted when memory hot unplug error occurs.
Data:
- "device": device name (json-string)
- "msg": Informative message (e.g., reason for the error) (json-string)
Example:
{ "event": "MEM_UNPLUG_ERROR"
"data": { "device": "dimm1",
"msg": "acpi: device unplug for unsupported device"
},
"timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
QUORUM_FAILURE
--------------
Emitted by the Quorum block driver if it fails to establish a quorum.
Data:
- "reference": device name if defined else node name.
- "sector-num": Number of the first sector of the failed read operation.
- "sectors-count": Failed read operation sector count.
Example:
{ "event": "QUORUM_FAILURE",
"data": { "reference": "usr1", "sector-num": 345435, "sectors-count": 5 },
"timestamp": { "seconds": 1344522075, "microseconds": 745528 } }
Note: this event is rate-limited.
QUORUM_REPORT_BAD
-----------------
Emitted to report a corruption of a Quorum file.
Data:
- "type": Quorum operation type
- "error": Error message (json-string, optional)
Only present on failure. This field contains a human-readable
error message. There are no semantics other than that the
block layer reported an error and clients should not try to
interpret the error string.
- "node-name": The graph node name of the block driver state.
- "sector-num": Number of the first sector of the failed read operation.
- "sectors-count": Failed read operation sector count.
Example:
Read operation:
{ "event": "QUORUM_REPORT_BAD",
"data": { "node-name": "node0", "sector-num": 345435, "sectors-count": 5,
"type": "read" },
"timestamp": { "seconds": 1344522075, "microseconds": 745528 } }
Flush operation:
{ "event": "QUORUM_REPORT_BAD",
"data": { "node-name": "node0", "sector-num": 0, "sectors-count": 2097120,
"type": "flush", "error": "Broken pipe" },
"timestamp": { "seconds": 1456406829, "microseconds": 291763 } }
Note: this event is rate-limited.
SPICE_MIGRATE_COMPLETED
-----------------------
Emitted when SPICE migration has completed
Data: None.
Example:
{ "timestamp": {"seconds": 1290688046, "microseconds": 417172},
"event": "SPICE_MIGRATE_COMPLETED" }
MIGRATION
---------
Emitted when a migration event happens
Data: None.
- "status": migration status
See MigrationStatus in ~/qapi-schema.json for possible values
Example:
{"timestamp": {"seconds": 1432121972, "microseconds": 744001},
"event": "MIGRATION", "data": {"status": "completed"}}
MIGRATION_PASS
--------------
Emitted from the source side of a migration at the start of each pass
(when it syncs the dirty bitmap)
Data: None.
- "pass": An incrementing count (starting at 1 on the first pass)
Example:
{"timestamp": {"seconds": 1449669631, "microseconds": 239225},
"event": "MIGRATION_PASS", "data": {"pass": 2}}
VSERPORT_CHANGE
---------------
Emitted when the guest opens or closes a virtio-serial port.
Data:
- "id": device identifier of the virtio-serial port (json-string)
- "open": true if the guest has opened the virtio-serial port (json-bool)
Example:
{ "event": "VSERPORT_CHANGE",
"data": { "id": "channel0", "open": true },
"timestamp": { "seconds": 1401385907, "microseconds": 422329 } }
Note: this event is rate-limited separately for each "id".
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