trace: count number of enabled events
[qemu.git] / docs / qmp-events.txt
blob52eb7e2f5ed6b8d66cc409f7f733dd7070121a6f
1                    QEMU Machine Protocol Events
2                    ============================
4 ACPI_DEVICE_OST
5 ---------------
7 Emitted when guest executes ACPI _OST method.
9  - data: ACPIOSTInfo type as described in qapi-schema.json
11 { "event": "ACPI_DEVICE_OST",
12      "data": { "device": "d1", "slot": "0", "slot-type": "DIMM", "source": 1, "status": 0 } }
14 BALLOON_CHANGE
15 --------------
17 Emitted when the guest changes the actual BALLOON level. This
18 value is equivalent to the 'actual' field return by the
19 'query-balloon' command
21 Data:
23 - "actual": actual level of the guest memory balloon in bytes (json-number)
25 Example:
27 { "event": "BALLOON_CHANGE",
28     "data": { "actual": 944766976 },
29     "timestamp": { "seconds": 1267020223, "microseconds": 435656 } }
31 Note: this event is rate-limited.
33 BLOCK_IMAGE_CORRUPTED
34 ---------------------
36 Emitted when a disk image is being marked corrupt. The image can be
37 identified by its device or node name. The 'device' field is always
38 present for compatibility reasons, but it can be empty ("") if the
39 image does not have a device name associated.
41 Data:
43 - "device":    Device name (json-string)
44 - "node-name": Node name (json-string, optional)
45 - "msg":       Informative message (e.g., reason for the corruption)
46                (json-string)
47 - "offset":    If the corruption resulted from an image access, this
48                is the host's access offset into the image
49                (json-int, optional)
50 - "size":      If the corruption resulted from an image access, this
51                is the access size (json-int, optional)
53 Example:
55 { "event": "BLOCK_IMAGE_CORRUPTED",
56     "data": { "device": "ide0-hd0", "node-name": "node0",
57         "msg": "Prevented active L1 table overwrite", "offset": 196608,
58         "size": 65536 },
59     "timestamp": { "seconds": 1378126126, "microseconds": 966463 } }
61 BLOCK_IO_ERROR
62 --------------
64 Emitted when a disk I/O error occurs.
66 Data:
68 - "device": device name (json-string)
69 - "operation": I/O operation (json-string, "read" or "write")
70 - "action": action that has been taken, it's one of the following (json-string):
71     "ignore": error has been ignored
72     "report": error has been reported to the device
73     "stop": the VM is going to stop because of the error
75 Example:
77 { "event": "BLOCK_IO_ERROR",
78     "data": { "device": "ide0-hd1",
79               "operation": "write",
80               "action": "stop" },
81     "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
83 Note: If action is "stop", a STOP event will eventually follow the
84 BLOCK_IO_ERROR event.
86 BLOCK_JOB_CANCELLED
87 -------------------
89 Emitted when a block job has been cancelled.
91 Data:
93 - "type":     Job type (json-string; "stream" for image streaming
94                                      "commit" for block commit)
95 - "device":   Device name (json-string)
96 - "len":      Maximum progress value (json-int)
97 - "offset":   Current progress value (json-int)
98               On success this is equal to len.
99               On failure this is less than len.
100 - "speed":    Rate limit, bytes per second (json-int)
102 Example:
104 { "event": "BLOCK_JOB_CANCELLED",
105      "data": { "type": "stream", "device": "virtio-disk0",
106                "len": 10737418240, "offset": 134217728,
107                "speed": 0 },
108      "timestamp": { "seconds": 1267061043, "microseconds": 959568 } }
110 BLOCK_JOB_COMPLETED
111 -------------------
113 Emitted when a block job has completed.
115 Data:
117 - "type":     Job type (json-string; "stream" for image streaming
118                                      "commit" for block commit)
119 - "device":   Device name (json-string)
120 - "len":      Maximum progress value (json-int)
121 - "offset":   Current progress value (json-int)
122               On success this is equal to len.
123               On failure this is less than len.
124 - "speed":    Rate limit, bytes per second (json-int)
125 - "error":    Error message (json-string, optional)
126               Only present on failure.  This field contains a human-readable
127               error message.  There are no semantics other than that streaming
128               has failed and clients should not try to interpret the error
129               string.
131 Example:
133 { "event": "BLOCK_JOB_COMPLETED",
134      "data": { "type": "stream", "device": "virtio-disk0",
135                "len": 10737418240, "offset": 10737418240,
136                "speed": 0 },
137      "timestamp": { "seconds": 1267061043, "microseconds": 959568 } }
139 BLOCK_JOB_ERROR
140 ---------------
142 Emitted when a block job encounters an error.
144 Data:
146 - "device": device name (json-string)
147 - "operation": I/O operation (json-string, "read" or "write")
148 - "action": action that has been taken, it's one of the following (json-string):
149     "ignore": error has been ignored, the job may fail later
150     "report": error will be reported and the job canceled
151     "stop": error caused job to be paused
153 Example:
155 { "event": "BLOCK_JOB_ERROR",
156     "data": { "device": "ide0-hd1",
157               "operation": "write",
158               "action": "stop" },
159     "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
161 BLOCK_JOB_READY
162 ---------------
164 Emitted when a block job is ready to complete.
166 Data:
168 - "type":     Job type (json-string; "stream" for image streaming
169                                      "commit" for block commit)
170 - "device":   Device name (json-string)
171 - "len":      Maximum progress value (json-int)
172 - "offset":   Current progress value (json-int)
173               On success this is equal to len.
174               On failure this is less than len.
175 - "speed":    Rate limit, bytes per second (json-int)
177 Example:
179 { "event": "BLOCK_JOB_READY",
180     "data": { "device": "drive0", "type": "mirror", "speed": 0,
181               "len": 2097152, "offset": 2097152 }
182     "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
184 Note: The "ready to complete" status is always reset by a BLOCK_JOB_ERROR
185 event.
187 DEVICE_DELETED
188 --------------
190 Emitted whenever the device removal completion is acknowledged
191 by the guest.
192 At this point, it's safe to reuse the specified device ID.
193 Device removal can be initiated by the guest or by HMP/QMP commands.
195 Data:
197 - "device": device name (json-string, optional)
198 - "path": device path (json-string)
200 { "event": "DEVICE_DELETED",
201   "data": { "device": "virtio-net-pci-0",
202             "path": "/machine/peripheral/virtio-net-pci-0" },
203   "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
205 DEVICE_TRAY_MOVED
206 -----------------
208 It's emitted whenever the tray of a removable device is moved by the guest
209 or by HMP/QMP commands.
211 Data:
213 - "device": device name (json-string)
214 - "tray-open": true if the tray has been opened or false if it has been closed
215                (json-bool)
217 { "event": "DEVICE_TRAY_MOVED",
218   "data": { "device": "ide1-cd0",
219             "tray-open": true
220   },
221   "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
223 GUEST_PANICKED
224 --------------
226 Emitted when guest OS panic is detected.
228 Data:
230 - "action": Action that has been taken (json-string, currently always "pause").
232 Example:
234 { "event": "GUEST_PANICKED",
235      "data": { "action": "pause" } }
237 MEM_UNPLUG_ERROR
238 --------------------
239 Emitted when memory hot unplug error occurs.
241 Data:
243 - "device": device name (json-string)
244 - "msg": Informative message (e.g., reason for the error) (json-string)
246 Example:
248 { "event": "MEM_UNPLUG_ERROR"
249   "data": { "device": "dimm1",
250             "msg": "acpi: device unplug for unsupported device"
251   },
252   "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
254 NIC_RX_FILTER_CHANGED
255 ---------------------
257 The event is emitted once until the query command is executed,
258 the first event will always be emitted.
260 Data:
262 - "name": net client name (json-string)
263 - "path": device path (json-string)
265 { "event": "NIC_RX_FILTER_CHANGED",
266   "data": { "name": "vnet0",
267             "path": "/machine/peripheral/vnet0/virtio-backend" },
268   "timestamp": { "seconds": 1368697518, "microseconds": 326866 } }
271 POWERDOWN
272 ---------
274 Emitted when the Virtual Machine is powered down through the power
275 control system, such as via ACPI.
277 Data: None.
279 Example:
281 { "event": "POWERDOWN",
282     "timestamp": { "seconds": 1267040730, "microseconds": 682951 } }
284 QUORUM_FAILURE
285 --------------
287 Emitted by the Quorum block driver if it fails to establish a quorum.
289 Data:
291 - "reference":     device name if defined else node name.
292 - "sector-num":    Number of the first sector of the failed read operation.
293 - "sectors-count": Failed read operation sector count.
295 Example:
297 { "event": "QUORUM_FAILURE",
298      "data": { "reference": "usr1", "sector-num": 345435, "sectors-count": 5 },
299      "timestamp": { "seconds": 1344522075, "microseconds": 745528 } }
301 Note: this event is rate-limited.
303 QUORUM_REPORT_BAD
304 -----------------
306 Emitted to report a corruption of a Quorum file.
308 Data:
310 - "error":         Error message (json-string, optional)
311                    Only present on failure.  This field contains a human-readable
312                    error message.  There are no semantics other than that the
313                    block layer reported an error and clients should not try to
314                    interpret the error string.
315 - "node-name":     The graph node name of the block driver state.
316 - "sector-num":    Number of the first sector of the failed read operation.
317 - "sectors-count": Failed read operation sector count.
319 Example:
321 { "event": "QUORUM_REPORT_BAD",
322      "data": { "node-name": "1.raw", "sector-num": 345435, "sectors-count": 5 },
323      "timestamp": { "seconds": 1344522075, "microseconds": 745528 } }
325 Note: this event is rate-limited.
327 RESET
328 -----
330 Emitted when the Virtual Machine is reset.
332 Data: None.
334 Example:
336 { "event": "RESET",
337     "timestamp": { "seconds": 1267041653, "microseconds": 9518 } }
339 RESUME
340 ------
342 Emitted when the Virtual Machine resumes execution.
344 Data: None.
346 Example:
348 { "event": "RESUME",
349     "timestamp": { "seconds": 1271770767, "microseconds": 582542 } }
351 RTC_CHANGE
352 ----------
354 Emitted when the guest changes the RTC time.
356 Data:
358 - "offset": Offset between base RTC clock (as specified by -rtc base), and
359 new RTC clock value (json-number)
361 Example:
363 { "event": "RTC_CHANGE",
364     "data": { "offset": 78 },
365     "timestamp": { "seconds": 1267020223, "microseconds": 435656 } }
367 Note: this event is rate-limited.
369 SHUTDOWN
370 --------
372 Emitted when the Virtual Machine has shut down, indicating that qemu
373 is about to exit.
375 Data: None.
377 Example:
379 { "event": "SHUTDOWN",
380     "timestamp": { "seconds": 1267040730, "microseconds": 682951 } }
382 Note: If the command-line option "-no-shutdown" has been specified, a STOP
383 event will eventually follow the SHUTDOWN event.
385 SPICE_CONNECTED
386 ---------------
388 Emitted when a SPICE client connects.
390 Data:
392 - "server": Server information (json-object)
393   - "host": IP address (json-string)
394   - "port": port number (json-string)
395   - "family": address family (json-string, "ipv4" or "ipv6")
396 - "client": Client information (json-object)
397   - "host": IP address (json-string)
398   - "port": port number (json-string)
399   - "family": address family (json-string, "ipv4" or "ipv6")
401 Example:
403 { "timestamp": {"seconds": 1290688046, "microseconds": 388707},
404   "event": "SPICE_CONNECTED",
405   "data": {
406     "server": { "port": "5920", "family": "ipv4", "host": "127.0.0.1"},
407     "client": {"port": "52873", "family": "ipv4", "host": "127.0.0.1"}
410 SPICE_DISCONNECTED
411 ------------------
413 Emitted when a SPICE client disconnects.
415 Data:
417 - "server": Server information (json-object)
418   - "host": IP address (json-string)
419   - "port": port number (json-string)
420   - "family": address family (json-string, "ipv4" or "ipv6")
421 - "client": Client information (json-object)
422   - "host": IP address (json-string)
423   - "port": port number (json-string)
424   - "family": address family (json-string, "ipv4" or "ipv6")
426 Example:
428 { "timestamp": {"seconds": 1290688046, "microseconds": 388707},
429   "event": "SPICE_DISCONNECTED",
430   "data": {
431     "server": { "port": "5920", "family": "ipv4", "host": "127.0.0.1"},
432     "client": {"port": "52873", "family": "ipv4", "host": "127.0.0.1"}
435 SPICE_INITIALIZED
436 -----------------
438 Emitted after initial handshake and authentication takes place (if any)
439 and the SPICE channel is up and running
441 Data:
443 - "server": Server information (json-object)
444   - "host": IP address (json-string)
445   - "port": port number (json-string)
446   - "family": address family (json-string, "ipv4" or "ipv6")
447   - "auth": authentication method (json-string, optional)
448 - "client": Client information (json-object)
449   - "host": IP address (json-string)
450   - "port": port number (json-string)
451   - "family": address family (json-string, "ipv4" or "ipv6")
452   - "connection-id": spice connection id.  All channels with the same id
453                      belong to the same spice session (json-int)
454   - "channel-type": channel type.  "1" is the main control channel, filter for
455                     this one if you want track spice sessions only (json-int)
456   - "channel-id": channel id.  Usually "0", might be different needed when
457                   multiple channels of the same type exist, such as multiple
458                   display channels in a multihead setup (json-int)
459   - "tls": whevener the channel is encrypted (json-bool)
461 Example:
463 { "timestamp": {"seconds": 1290688046, "microseconds": 417172},
464   "event": "SPICE_INITIALIZED",
465   "data": {"server": {"auth": "spice", "port": "5921",
466                       "family": "ipv4", "host": "127.0.0.1"},
467            "client": {"port": "49004", "family": "ipv4", "channel-type": 3,
468                       "connection-id": 1804289383, "host": "127.0.0.1",
469                       "channel-id": 0, "tls": true}
472 SPICE_MIGRATE_COMPLETED
473 -----------------------
475 Emitted when SPICE migration has completed
477 Data: None.
479 Example:
481 { "timestamp": {"seconds": 1290688046, "microseconds": 417172},
482   "event": "SPICE_MIGRATE_COMPLETED" }
484 MIGRATION
485 ---------
487 Emitted when a migration event happens
489 Data: None.
491  - "status": migration status
492      See MigrationStatus in ~/qapi-schema.json for possible values
494 Example:
496 {"timestamp": {"seconds": 1432121972, "microseconds": 744001},
497  "event": "MIGRATION", "data": {"status": "completed"}}
499 MIGRATION_PASS
500 --------------
502 Emitted from the source side of a migration at the start of each pass
503 (when it syncs the dirty bitmap)
505 Data: None.
507   - "pass": An incrementing count (starting at 1 on the first pass)
509 Example:
510 {"timestamp": {"seconds": 1449669631, "microseconds": 239225},
511  "event": "MIGRATION_PASS", "data": {"pass": 2}}
513 STOP
514 ----
516 Emitted when the Virtual Machine is stopped.
518 Data: None.
520 Example:
522 { "event": "STOP",
523     "timestamp": { "seconds": 1267041730, "microseconds": 281295 } }
525 SUSPEND
526 -------
528 Emitted when guest enters S3 state.
530 Data: None.
532 Example:
534 { "event": "SUSPEND",
535      "timestamp": { "seconds": 1344456160, "microseconds": 309119 } }
537 SUSPEND_DISK
538 ------------
540 Emitted when the guest makes a request to enter S4 state.
542 Data: None.
544 Example:
546 { "event": "SUSPEND_DISK",
547      "timestamp": { "seconds": 1344456160, "microseconds": 309119 } }
549 Note: QEMU shuts down when entering S4 state.
551 VNC_CONNECTED
552 -------------
554 Emitted when a VNC client establishes a connection.
556 Data:
558 - "server": Server information (json-object)
559   - "host": IP address (json-string)
560   - "service": port number (json-string)
561   - "family": address family (json-string, "ipv4" or "ipv6")
562   - "auth": authentication method (json-string, optional)
563 - "client": Client information (json-object)
564   - "host": IP address (json-string)
565   - "service": port number (json-string)
566   - "family": address family (json-string, "ipv4" or "ipv6")
568 Example:
570 { "event": "VNC_CONNECTED",
571     "data": {
572         "server": { "auth": "sasl", "family": "ipv4",
573                     "service": "5901", "host": "0.0.0.0" },
574         "client": { "family": "ipv4", "service": "58425",
575                     "host": "127.0.0.1" } },
576     "timestamp": { "seconds": 1262976601, "microseconds": 975795 } }
579 Note: This event is emitted before any authentication takes place, thus
580 the authentication ID is not provided.
582 VNC_DISCONNECTED
583 ----------------
585 Emitted when the connection is closed.
587 Data:
589 - "server": Server information (json-object)
590   - "host": IP address (json-string)
591   - "service": port number (json-string)
592   - "family": address family (json-string, "ipv4" or "ipv6")
593   - "auth": authentication method (json-string, optional)
594 - "client": Client information (json-object)
595   - "host": IP address (json-string)
596   - "service": port number (json-string)
597   - "family": address family (json-string, "ipv4" or "ipv6")
598   - "x509_dname": TLS dname (json-string, optional)
599   - "sasl_username": SASL username (json-string, optional)
601 Example:
603 { "event": "VNC_DISCONNECTED",
604     "data": {
605         "server": { "auth": "sasl", "family": "ipv4",
606                     "service": "5901", "host": "0.0.0.0" },
607         "client": { "family": "ipv4", "service": "58425",
608                     "host": "127.0.0.1", "sasl_username": "luiz" } },
609     "timestamp": { "seconds": 1262976601, "microseconds": 975795 } }
611 VNC_INITIALIZED
612 ---------------
614 Emitted after authentication takes place (if any) and the VNC session is
615 made active.
617 Data:
619 - "server": Server information (json-object)
620   - "host": IP address (json-string)
621   - "service": port number (json-string)
622   - "family": address family (json-string, "ipv4" or "ipv6")
623   - "auth": authentication method (json-string, optional)
624 - "client": Client information (json-object)
625   - "host": IP address (json-string)
626   - "service": port number (json-string)
627   - "family": address family (json-string, "ipv4" or "ipv6")
628   - "x509_dname": TLS dname (json-string, optional)
629   - "sasl_username": SASL username (json-string, optional)
631 Example:
633 { "event": "VNC_INITIALIZED",
634     "data": {
635         "server": { "auth": "sasl", "family": "ipv4",
636                     "service": "5901", "host": "0.0.0.0"},
637         "client": { "family": "ipv4", "service": "46089",
638                     "host": "127.0.0.1", "sasl_username": "luiz" } },
639         "timestamp": { "seconds": 1263475302, "microseconds": 150772 } }
641 VSERPORT_CHANGE
642 ---------------
644 Emitted when the guest opens or closes a virtio-serial port.
646 Data:
648 - "id": device identifier of the virtio-serial port (json-string)
649 - "open": true if the guest has opened the virtio-serial port (json-bool)
651 Example:
653 { "event": "VSERPORT_CHANGE",
654     "data": { "id": "channel0", "open": true },
655     "timestamp": { "seconds": 1401385907, "microseconds": 422329 } }
657 Note: this event is rate-limited separately for each "id".
659 WAKEUP
660 ------
662 Emitted when the guest has woken up from S3 and is running.
664 Data: None.
666 Example:
668 { "event": "WAKEUP",
669      "timestamp": { "seconds": 1344522075, "microseconds": 745528 } }
671 WATCHDOG
672 --------
674 Emitted when the watchdog device's timer is expired.
676 Data:
678 - "action": Action that has been taken, it's one of the following (json-string):
679             "reset", "shutdown", "poweroff", "pause", "debug", or "none"
681 Example:
683 { "event": "WATCHDOG",
684      "data": { "action": "reset" },
685      "timestamp": { "seconds": 1267061043, "microseconds": 959568 } }
687 Note: If action is "reset", "shutdown", or "pause" the WATCHDOG event is
688 followed respectively by the RESET, SHUTDOWN, or STOP events.
690 Note: this event is rate-limited.