path: root/docs/qmp/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 } }

BLOCK_IMAGE_CORRUPTED
---------------------

Emitted when a disk image is being marked corrupt.

Data:

- "device": Device name (json-string)
- "msg":    Informative message (e.g., reason for the corruption) (json-string)
- "offset": If the corruption resulted from an image access, this is the access
            offset into the image (json-int)
- "size":   If the corruption resulted from an image access, this is the access
            size (json-int)

Example:

{ "event": "BLOCK_IMAGE_CORRUPTED",
    "data": { "device": "ide0-hd0",
        "msg": "Prevented active L1 table overwrite", "offset": 196608,
        "size": 65536 },
    "timestamp": { "seconds": 1378126126, "microseconds": 966463 } }

BLOCK_IO_ERROR
--------------

Emitted when a disk I/O error occurs.

Data:

- "device": device name (json-string)
- "operation": I/O operation (json-string, "read" or "write")
- "action": action that has been taken, it's one of the following (json-string):
    "ignore": error has been ignored
    "report": error has been reported to the device
    "stop": the VM is going to stop because of the error

Example:

{ "event": "BLOCK_IO_ERROR",
    "data": { "device": "ide0-hd1",
              "operation": "write",
              "action": "stop" },
    "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }

Note: If action is "stop", a STOP event will eventually follow the
BLOCK_IO_ERROR event.

BLOCK_JOB_CANCELLED
-------------------

Emitted when a block job has been cancelled.

Data:

- "type":     Job type (json-string; "stream" for image streaming
                                     "commit" for block commit)
- "device":   Device name (json-string)
- "len":      Maximum progress value (json-int)
- "offset":   Current progress value (json-int)
              On success this is equal to len.
              On failure this is less than len.
- "speed":    Rate limit, bytes per second (json-int)

Example:

{ "event": "BLOCK_JOB_CANCELLED",
     "data": { "type": "stream", "device": "virtio-disk0",
               "len": 10737418240, "offset": 134217728,
               "speed": 0 },
     "timestamp": { "seconds": 1267061043, "microseconds": 959568 } }

BLOCK_JOB_COMPLETED
-------------------

Emitted when a block job has completed.

Data:

- "type":     Job type (json-string; "stream" for image streaming
                                     "commit" for block commit)
- "device":   Device name (json-string)
- "len":      Maximum progress value (json-int)
- "offset":   Current progress value (json-int)
              On success this is equal to len.
              On failure this is less than len.
- "speed":    Rate limit, bytes per second (json-int)
- "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 streaming
              has failed and clients should not try to interpret the error
              string.

Example:

{ "event": "BLOCK_JOB_COMPLETED",
     "data": { "type": "stream", "device": "virtio-disk0",
               "len": 10737418240, "offset": 10737418240,
               "speed": 0 },
     "timestamp": { "seconds": 1267061043, "microseconds": 959568 } }

BLOCK_JOB_ERROR
---------------

Emitted when a block job encounters an error.

Data:

- "device": device name (json-string)
- "operation": I/O operation (json-string, "read" or "write")
- "action": action that has been taken, it's one of the following (json-string):
    "ignore": error has been ignored, the job may fail later
    "report": error will be reported and the job canceled
    "stop": error caused job to be paused

Example:

{ "event": "BLOCK_JOB_ERROR",
    "data": { "device": "ide0-hd1",
              "operation": "write",
              "action": "stop" },
    "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }

BLOCK_JOB_READY
---------------

Emitted when a block job is ready to complete.

Data:

- "device": device name (json-string)

Example:

{ "event": "BLOCK_JOB_READY",
    "data": { "device": "ide0-hd1" },
    "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }

Note: The "ready to complete" status is always reset by a BLOCK_JOB_ERROR
event.

DEVICE_TRAY_MOVED
-----------------

It's emitted whenever the tray of a removable device is moved by the guest
or by HMP/QMP commands.

Data:

- "device": device name (json-string)
- "tray-open": true if the tray has been opened or false if it has been closed
               (json-bool)

{ "event": "DEVICE_TRAY_MOVED",
  "data": { "device": "ide1-cd0",
            "tray-open": true
  },
  "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }

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" } }

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.
- "sector-count": Failed read operation sector count.

Example:

{ "event": "QUORUM_FAILURE",
     "data": { "reference": "usr1", "sector-num": 345435, "sector-count": 5 },
     "timestamp": { "seconds": 1344522075, "microseconds": 745528 } }

QUORUM_REPORT_BAD
-----------------

Emitted to report a corruption of a Quorum file.

Data:

- "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.
- "sector-count": Failed read operation sector count.

Example:

{ "event": "QUORUM_REPORT_BAD",
     "data": { "node-name": "1.raw", "sector-num": 345435, "sector-count": 5 },
     "timestamp": { "seconds": 1344522075, "microseconds": 745528 } }

SPICE_CONNECTED, SPICE_DISCONNECTED
-----------------------------------

Emitted when a SPICE client connects or 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_CONNECTED",
  "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'n'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}
}}

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 } }