path: root/docs/qmp-events.txt

                   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.

DEVICE_DELETED
--------------

Emitted whenever the device removal completion is acknowledged
by the guest.
At this point, it's safe to reuse the specified device ID.
Device removal can be initiated by the guest or by HMP/QMP commands.

Data:

- "device": device name (json-string, optional)
- "path": device path (json-string)

{ "event": "DEVICE_DELETED",
  "data": { "device": "virtio-net-pci-0",
            "path": "/machine/peripheral/virtio-net-pci-0" },
  "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }

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 } }

NIC_RX_FILTER_CHANGED
---------------------

The event is emitted once until the query command is executed,
the first event will always be emitted.

Data:

- "name": net client name (json-string)
- "path": device path (json-string)

{ "event": "NIC_RX_FILTER_CHANGED",
  "data": { "name": "vnet0",
            "path": "/machine/peripheral/vnet0/virtio-backend" },
  "timestamp": { "seconds": 1368697518, "microseconds": 326866 } }
}

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.

RESUME
------

Emitted when the Virtual Machine resumes execution.

Data: None.

Example:

{ "event": "RESUME",
    "timestamp": { "seconds": 1271770767, "microseconds": 582542 } }

RTC_CHANGE
----------

Emitted when the guest changes the RTC time.

Data:

- "offset": Offset between base RTC clock (as specified by -rtc base), and
new RTC clock value (json-number)

Example:

{ "event": "RTC_CHANGE",
    "data": { "offset": 78 },
    "timestamp": { "seconds": 1267020223, "microseconds": 435656 } }

Note: this event is rate-limited.

SPICE_CONNECTED
---------------

Emitted when a SPICE client connects.

Data:

- "server": Server information (json-object)
  - "host": IP address (json-string)
  - "port": port number (json-string)
  - "family": address family (json-string, "ipv4" or "ipv6")
- "client": Client information (json-object)
  - "host": IP address (json-string)
  - "port": port number (json-string)
  - "family": address family (json-string, "ipv4" or "ipv6")

Example:

{ "timestamp": {"seconds": 1290688046, "microseconds": 388707},
  "event": "SPICE_CONNECTED",
  "data": {
    "server": { "port": "5920", "family": "ipv4", "host": "127.0.0.1"},
    "client": {"port": "52873", "family": "ipv4", "host": "127.0.0.1"}
}}

SPICE_DISCONNECTED
------------------

Emitted when a SPICE client disconnects.

Data:

- "server": Server information (json-object)
  - "host": IP address (json-string)
  - "port": port number (json-string)
  - "family": address family (json-string, "ipv4" or "ipv6")
- "client": Client information (json-object)
  - "host": IP address (json-string)
  - "port": port number (json-string)
  - "family": address family (json-string, "ipv4" or "ipv6")

Example:

{ "timestamp": {"seconds": 1290688046, "microseconds": 388707},
  "event": "SPICE_DISCONNECTED",
  "data": {
    "server": { "port": "5920", "family": "ipv4", "host": "127.0.0.1"},
    "client": {"port": "52873", "family": "ipv4", "host": "127.0.0.1"}
}}

SPICE_INITIALIZED
-----------------

Emitted after initial handshake and authentication takes place (if any)
and the SPICE channel is up and running

Data:

- "server": Server information (json-object)
  - "host": IP address (json-string)
  - "port": port number (json-string)
  - "family": address family (json-string, "ipv4" or "ipv6")
  - "auth": authentication method (json-string, optional)
- "client": Client information (json-object)
  - "host": IP address (json-string)
  - "port": port number (json-string)
  - "family": address family (json-string, "ipv4" or "ipv6")
  - "connection-id": spice connection id.  All channels with the same id
                     belong to the same spice session (json-int)
  - "channel-type": channel type.  "1" is the main control channel, filter for
                    this one if you want track spice sessions only (json-int)
  - "channel-id": channel id.  Usually "0", might be different needed when
                  multiple channels of the same type exist, such as multiple
                  display channels in a multihead setup (json-int)
  - "tls": whevener the channel is encrypted (json-bool)

Example:

{ "timestamp": {"seconds": 1290688046, "microseconds": 417172},
  "event": "SPICE_INITIALIZED",
  "data": {"server": {"auth": "spice", "port": "5921",
                      "family": "ipv4", "host": "127.0.0.1"},
           "client": {"port": "49004", "family": "ipv4", "channel-type": 3,
                      "connection-id": 1804289383, "host": "127.0.0.1",
                      "channel-id": 0, "tls": true}
}}

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}}

STOP
----

Emitted when the Virtual Machine is stopped.

Data: None.

Example:

{ "event": "STOP",
    "timestamp": { "seconds": 1267041730, "microseconds": 281295 } }

SUSPEND
-------

Emitted when guest enters S3 state.

Data: None.

Example:

{ "event": "SUSPEND",
     "timestamp": { "seconds": 1344456160, "microseconds": 309119 } }

SUSPEND_DISK
------------

Emitted when the guest makes a request to enter S4 state.

Data: None.

Example:

{ "event": "SUSPEND_DISK",
     "timestamp": { "seconds": 1344456160, "microseconds": 309119 } }

Note: QEMU shuts down when entering S4 state.

VNC_CONNECTED
-------------

Emitted when a VNC client establishes a connection.

Data:

- "server": Server information (json-object)
  - "host": IP address (json-string)
  - "service": port number (json-string)
  - "family": address family (json-string, "ipv4" or "ipv6")
  - "auth": authentication method (json-string, optional)
- "client": Client information (json-object)
  - "host": IP address (json-string)
  - "service": port number (json-string)
  - "family": address family (json-string, "ipv4" or "ipv6")

Example:

{ "event": "VNC_CONNECTED",
    "data": {
        "server": { "auth": "sasl", "family": "ipv4",
                    "service": "5901", "host": "0.0.0.0" },
        "client": { "family": "ipv4", "service": "58425",
                    "host": "127.0.0.1" } },
    "timestamp": { "seconds": 1262976601, "microseconds": 975795 } }


Note: This event is emitted before any authentication takes place, thus
the authentication ID is not provided.

VNC_DISCONNECTED
----------------

Emitted when the connection is closed.

Data:

- "server": Server information (json-object)
  - "host": IP address (json-string)
  - "service": port number (json-string)
  - "family": address family (json-string, "ipv4" or "ipv6")
  - "auth": authentication method (json-string, optional)
- "client": Client information (json-object)
  - "host": IP address (json-string)
  - "service": port number (json-string)
  - "family": address family (json-string, "ipv4" or "ipv6")
  - "x509_dname": TLS dname (json-string, optional)
  - "sasl_username": SASL username (json-string, optional)

Example:

{ "event": "VNC_DISCONNECTED",
    "data": {
        "server": { "auth": "sasl", "family": "ipv4",
                    "service": "5901", "host": "0.0.0.0" },
        "client": { "family": "ipv4", "service": "58425",
                    "host": "127.0.0.1", "sasl_username": "luiz" } },
    "timestamp": { "seconds": 1262976601, "microseconds": 975795 } }

VNC_INITIALIZED
---------------

Emitted after authentication takes place (if any) and the VNC session is
made active.

Data:

- "server": Server information (json-object)
  - "host": IP address (json-string)
  - "service": port number (json-string)
  - "family": address family (json-string, "ipv4" or "ipv6")
  - "auth": authentication method (json-string, optional)
- "client": Client information (json-object)
  - "host": IP address (json-string)
  - "service": port number (json-string)
  - "family": address family (json-string, "ipv4" or "ipv6")
  - "x509_dname": TLS dname (json-string, optional)
  - "sasl_username": SASL username (json-string, optional)

Example:

{ "event": "VNC_INITIALIZED",
    "data": {
        "server": { "auth": "sasl", "family": "ipv4",
                    "service": "5901", "host": "0.0.0.0"},
        "client": { "family": "ipv4", "service": "46089",
                    "host": "127.0.0.1", "sasl_username": "luiz" } },
        "timestamp": { "seconds": 1263475302, "microseconds": 150772 } }

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".

WAKEUP
------

Emitted when the guest has woken up from S3 and is running.

Data: None.

Example:

{ "event": "WAKEUP",
     "timestamp": { "seconds": 1344522075, "microseconds": 745528 } }

WATCHDOG
--------

Emitted when the watchdog device's timer is expired.

Data:

- "action": Action that has been taken, it's one of the following (json-string):
            "reset", "shutdown", "poweroff", "pause", "debug", or "none"

Example:

{ "event": "WATCHDOG",
     "data": { "action": "reset" },
     "timestamp": { "seconds": 1267061043, "microseconds": 959568 } }

Note: If action is "reset", "shutdown", or "pause" the WATCHDOG event is
followed respectively by the RESET, SHUTDOWN, or STOP events.

Note: this event is rate-limited.