1 HXCOMM QMP dispatch table and documentation
2 HXCOMM Text between SQMP and EQMP is copied to the QMP documention file and
3 HXCOMM does not show up
in the other formats
.
9 This document describes all commands currently supported by QMP
.
11 Most of the time their usage is exactly the same as
in the user Monitor
, this
12 means that any other document which also describe
commands (the manpage
,
13 QEMU
's manual, etc) can and should be consulted.
15 QMP has two types of commands: regular and query commands. Regular commands
16 usually change the Virtual Machine's state someway
, while query commands just
17 return information
. The sections below are divided accordingly
.
19 It
's important to observe that all communication examples are formatted in
20 a reader-friendly way, so that they're easier to understand
. However
, in real
21 protocol usage
, they
're emitted as a single line.
23 Also, the following notation is used to denote data flow:
25 -> data issued by the Client
26 <- Server data response
28 Please, refer to the QMP specification (QMP/qmp-spec.txt) for detailed
29 information on the Server command and response formats.
31 NOTE: This document is temporary and will be replaced soon.
33 1. Stability Considerations
34 ===========================
36 The current QMP command set (described in this file) may be useful for a
37 number of use cases, however it's limited and several commands have bad
38 defined semantics
, specially with regard to command completion
.
40 These problems are going to be solved incrementally
in the next QEMU releases
41 and we
're going to establish a deprecation policy for badly defined commands.
43 If you're planning to adopt QMP
, please observe the following
:
45 1. The deprecation policy will take effect and be documented soon
, please
46 check the documentation of each used command as soon as a
new release of
49 2. DO NOT rely on anything which is not explicit documented
51 3. Errors
, in special
, are not documented
. Applications should NOT check
52 for specific errors classes or
data (it
's strongly recommended to only
53 check for the "error" key)
58 Server's responses
in the examples below are always a success response
, please
59 refer to the QMP specification
for more details on error responses
.
66 .mhandler
.cmd_new
= qmp_marshal_input_quit
,
79 -> { "execute": "quit" }
86 .args_type
= "force:-f,device:B",
87 .mhandler
.cmd_new
= qmp_marshal_input_eject
,
94 Eject a removable medium
.
98 - force
: force
ejection (json
-bool
, optional
)
99 - device
: device
name (json
-string
)
103 -> { "execute": "eject", "arguments": { "device": "ide1-cd0" } }
106 Note
: The
"force" argument defaults to
false.
112 .args_type
= "device:B,target:F,arg:s?",
113 .mhandler
.cmd_new
= qmp_marshal_input_change
,
120 Change a removable medium or VNC configuration
.
124 - "device": device
name (json
-string
)
125 - "target": filename or
item (json
-string
)
126 - "arg": additional
argument (json
-string
, optional
)
130 1. Change a removable medium
132 -> { "execute": "change",
133 "arguments": { "device": "ide1-cd0",
134 "target": "/srv/images/Fedora-12-x86_64-DVD.iso" } }
137 2. Change VNC password
139 -> { "execute": "change",
140 "arguments": { "device": "vnc", "target": "password",
147 .name
= "screendump",
148 .args_type
= "filename:F",
149 .params
= "filename",
150 .help
= "save screen into PPM image 'filename'",
151 .user_print
= monitor_user_noop
,
152 .mhandler
.cmd_new
= do_screen_dump
,
159 Save screen into PPM image
.
163 - "filename": file
path (json
-string
)
167 -> { "execute": "screendump", "arguments": { "filename": "/tmp/image" } }
175 .mhandler
.cmd_new
= qmp_marshal_input_stop
,
188 -> { "execute": "stop" }
196 .mhandler
.cmd_new
= qmp_marshal_input_cont
,
209 -> { "execute": "cont" }
215 .name
= "system_wakeup",
217 .mhandler
.cmd_new
= qmp_marshal_input_system_wakeup
,
224 Wakeup guest from suspend
.
230 -> { "execute": "system_wakeup" }
236 .name
= "system_reset",
238 .mhandler
.cmd_new
= qmp_marshal_input_system_reset
,
251 -> { "execute": "system_reset" }
257 .name
= "system_powerdown",
259 .mhandler
.cmd_new
= qmp_marshal_input_system_powerdown
,
266 Send system power down event
.
272 -> { "execute": "system_powerdown" }
278 .name
= "device_add",
279 .args_type
= "device:O",
280 .params
= "driver[,prop=value][,...]",
281 .help
= "add device, like -device on the command line",
282 .user_print
= monitor_user_noop
,
283 .mhandler
.cmd_new
= do_device_add
,
294 - "driver": the name of the
new device
's driver (json-string)
295 - "bus": the device's parent
bus (device tree path
, json
-string
, optional
)
296 - "id": the device
's ID, must be unique (json-string)
301 -> { "execute": "device_add", "arguments": { "driver": "e1000", "id": "net1" } }
306 (1) For detailed information about this command, please refer to the
307 'docs
/qdev
-device
-use
.txt
' file.
309 (2) It's possible to list device properties by running QEMU with the
310 "-device DEVICE,\?" command
-line argument
, where DEVICE is the device
's name
315 .name = "device_del",
317 .mhandler.cmd_new = qmp_marshal_input_device_del,
328 - "id": the device's
ID (json
-string
)
332 -> { "execute": "device_del", "arguments": { "id": "net1" } }
339 .args_type
= "index:i",
340 .mhandler
.cmd_new
= qmp_marshal_input_cpu
,
351 - "index": the CPU
's index (json-int)
355 -> { "execute": "cpu", "arguments": { "index": 0 } }
358 Note: CPUs' indexes are obtained with the
'query-cpus' command
.
364 .args_type
= "val:l,size:i,filename:s,cpu:i?",
365 .mhandler
.cmd_new
= qmp_marshal_input_memsave
,
372 Save to disk virtual memory dump starting at
'val' of size
'size'.
376 - "val": the starting
address (json
-int
)
377 - "size": the memory size
, in bytes (json
-int
)
378 - "filename": file
path (json
-string
)
379 - "cpu": virtual CPU
index (json
-int
, optional
)
383 -> { "execute": "memsave",
384 "arguments": { "val": 10,
386 "filename": "/tmp/virtual-mem-dump" } }
393 .args_type
= "val:l,size:i,filename:s",
394 .mhandler
.cmd_new
= qmp_marshal_input_pmemsave
,
401 Save to disk physical memory dump starting at
'val' of size
'size'.
405 - "val": the starting
address (json
-int
)
406 - "size": the memory size
, in bytes (json
-int
)
407 - "filename": file
path (json
-string
)
411 -> { "execute": "pmemsave",
412 "arguments": { "val": 10,
414 "filename": "/tmp/physical-mem-dump" } }
420 .name
= "inject-nmi",
422 .mhandler
.cmd_new
= qmp_marshal_input_inject_nmi
,
429 Inject an NMI on guest
's CPUs.
435 -> { "execute": "inject-nmi" }
438 Note: inject-nmi is only supported for x86 guest currently, it will
439 returns "Unsupported" error for non-x86 guest.
444 .name = "xen-save-devices-state",
445 .args_type = "filename:F",
446 .mhandler.cmd_new = qmp_marshal_input_xen_save_devices_state,
450 xen-save-devices-state
453 Save the state of all devices to file. The RAM and the block devices
454 of the VM are not saved by this command.
458 - "filename": the file to save the state of the devices to as binary
459 data. See xen-save-devices-state.txt for a description of the binary
464 -> { "execute": "xen-save-devices-state",
465 "arguments": { "filename": "/tmp/save" } }
472 .args_type = "detach:-d,blk:-b,inc:-i,uri:s",
473 .mhandler.cmd_new = qmp_marshal_input_migrate,
484 - "blk": block migration, full disk copy (json-bool, optional)
485 - "inc": incremental disk copy (json-bool, optional)
486 - "uri": Destination URI (json-string)
490 -> { "execute": "migrate", "arguments": { "uri": "tcp:0:4446" } }
495 (1) The 'query
-migrate
' command should be used to check migration's progress
496 and final
result (this information is provided by the
'status' member
)
497 (2) All boolean arguments
default to
false
498 (3) The user Monitor
's "detach" argument is invalid in QMP and should not
504 .name = "migrate_cancel",
506 .mhandler.cmd_new = qmp_marshal_input_migrate_cancel,
513 Cancel the current migration.
519 -> { "execute": "migrate_cancel" }
525 .name = "migrate_set_speed",
526 .args_type = "value:o",
527 .mhandler.cmd_new = qmp_marshal_input_migrate_set_speed,
534 Set maximum speed for migrations.
538 - "value": maximum speed, in bytes per second (json-int)
542 -> { "execute": "migrate_set_speed", "arguments": { "value": 1024 } }
548 .name = "migrate_set_downtime",
549 .args_type = "value:T",
550 .mhandler.cmd_new = qmp_marshal_input_migrate_set_downtime,
557 Set maximum tolerated downtime (in seconds) for migrations.
561 - "value": maximum downtime (json-number)
565 -> { "execute": "migrate_set_downtime", "arguments": { "value": 0.1 } }
571 .name = "client_migrate_info",
572 .args_type = "protocol:s,hostname:s,port:i?,tls-port:i?,cert-subject:s?",
573 .params = "protocol hostname port tls-port cert-subject",
574 .help = "send migration info to spice/vnc client",
575 .user_print = monitor_user_noop,
576 .mhandler.cmd_async = client_migrate_info,
577 .flags = MONITOR_CMD_ASYNC,
584 Set the spice/vnc connection info for the migration target. The spice/vnc
585 server will ask the spice/vnc client to automatically reconnect using the
586 new parameters (if specified) once the vm migration finished successfully.
590 - "protocol": protocol: "spice" or "vnc" (json-string)
591 - "hostname": migration target hostname (json-string)
592 - "port": spice/vnc tcp port for plaintext channels (json-int, optional)
593 - "tls-port": spice tcp port for tls-secured channels (json-int, optional)
594 - "cert-subject": server certificate subject (json-string, optional)
598 -> { "execute": "client_migrate_info",
599 "arguments": { "protocol": "spice",
600 "hostname": "virt42.lab.kraxel.org",
607 .name = "dump-guest-memory",
608 .args_type = "paging:b,protocol:s,begin:i?,end:i?",
609 .params = "-p protocol [begin] [length]",
610 .help = "dump guest memory to file",
611 .user_print = monitor_user_noop,
612 .mhandler.cmd_new = qmp_marshal_input_dump_guest_memory,
619 Dump guest memory to file. The file can be processed with crash or gdb.
623 - "paging": do paging to get guest's memory
mapping (json
-bool
)
624 - "protocol": destination
file(started with
"file:") or destination file
625 descriptor (started with
"fd:") (json
-string
)
626 - "begin": the starting physical address
. It
's optional, and should be specified
627 with length together (json-int)
628 - "length": the memory size, in bytes. It's optional
, and should be specified
629 with begin
together (json
-int
)
633 -> { "execute": "dump-guest-memory", "arguments": { "protocol": "fd:dump" } }
638 (1) All boolean arguments
default to
false
643 .name
= "netdev_add",
644 .args_type
= "netdev:O",
645 .mhandler
.cmd_new
= qmp_netdev_add
,
652 Add host network device
.
656 - "type": the device type
, "tap", "user", ... (json
-string
)
657 - "id": the device
's ID, must be unique (json-string)
662 -> { "execute": "netdev_add", "arguments": { "type": "user", "id": "netdev1" } }
665 Note: The supported device options are the same ones supported by the '-net
'
666 command-line argument, which are listed in the '-help
' output or QEMU's
672 .name
= "netdev_del",
674 .mhandler
.cmd_new
= qmp_marshal_input_netdev_del
,
681 Remove host network device
.
685 - "id": the device
's ID, must be unique (json-string)
689 -> { "execute": "netdev_del", "arguments": { "id": "netdev1" } }
696 .name = "block_resize",
697 .args_type = "device:B,size:o",
698 .mhandler.cmd_new = qmp_marshal_input_block_resize,
705 Resize a block image while a guest is running.
709 - "device": the device's ID
, must be
unique (json
-string
)
714 -> { "execute": "block_resize", "arguments": { "device": "scratch", "size": 1073741824 } }
720 .name
= "block-stream",
721 .args_type
= "device:B,base:s?,speed:o?",
722 .mhandler
.cmd_new
= qmp_marshal_input_block_stream
,
726 .name
= "block-job-set-speed",
727 .args_type
= "device:B,speed:o",
728 .mhandler
.cmd_new
= qmp_marshal_input_block_job_set_speed
,
732 .name
= "block-job-cancel",
733 .args_type
= "device:B",
734 .mhandler
.cmd_new
= qmp_marshal_input_block_job_cancel
,
737 .name
= "transaction",
738 .args_type
= "actions:q",
739 .mhandler
.cmd_new
= qmp_marshal_input_transaction
,
746 Atomically operate on one or more block devices
. The only supported
747 operation
for now is snapshotting
. If there is any failure performing
748 any of the operations
, all snapshots
for the group are abandoned
, and
749 the original disks pre
-snapshot attempt are used
.
751 A list of dictionaries is accepted
, that contains the actions to be performed
.
752 For snapshots
this is the device
, the file to use
for the
new snapshot
,
753 and the format
. The
default format
, if not specified
, is qcow2
.
755 Each
new snapshot defaults to being created by
QEMU (wiping any
756 contents
if the file already exists
), but it is also possible to reuse
757 an externally
-created file
. In the latter
case, you should ensure that
758 the
new image file has the same contents as the current one
; QEMU cannot
759 perform any meaningful check
. Typically
this is achieved by
using the
760 current image file as the backing file
for the
new image
.
765 - "type": the operation to perform
. The only supported
766 value is
"blockdev-snapshot-sync". (json
-string
)
767 - "data": a dictionary
. The contents depend on the value
768 of
"type". When
"type" is
"blockdev-snapshot-sync":
769 - "device": device name to
snapshot (json
-string
)
770 - "snapshot-file": name of
new image
file (json
-string
)
771 - "format": format of
new image (json
-string
, optional
)
772 - "mode": whether and how QEMU should create the snapshot file
773 (NewImageMode
, optional
, default "absolute-paths")
777 -> { "execute": "transaction",
778 "arguments": { "actions": [
779 { 'type': 'blockdev-snapshot-sync', 'data' : { "device": "ide-hd0",
780 "snapshot-file": "/some/place/my-image",
781 "format": "qcow2" } },
782 { 'type': 'blockdev-snapshot-sync', 'data' : { "device": "ide-hd1",
783 "snapshot-file": "/some/place/my-image2",
785 "format": "qcow2" } } ] } }
791 .name
= "blockdev-snapshot-sync",
792 .args_type
= "device:B,snapshot-file:s,format:s?,mode:s?",
793 .mhandler
.cmd_new
= qmp_marshal_input_blockdev_snapshot_sync
,
797 blockdev
-snapshot
-sync
798 ----------------------
800 Synchronous snapshot of a block device
. snapshot
-file specifies the
801 target of the
new image
. If the file exists
, or
if it is a device
, the
802 snapshot will be created
in the existing file
/device
. If does not
803 exist
, a
new file will be created
. format specifies the format of the
804 snapshot image
, default is qcow2
.
808 - "device": device name to
snapshot (json
-string
)
809 - "snapshot-file": name of
new image
file (json
-string
)
810 - "mode": whether and how QEMU should create the snapshot file
811 (NewImageMode
, optional
, default "absolute-paths")
812 - "format": format of
new image (json
-string
, optional
)
816 -> { "execute": "blockdev-snapshot-sync", "arguments": { "device": "ide-hd0",
818 "/some/place/my-image",
819 "format": "qcow2" } }
826 .args_type
= "value:M",
827 .mhandler
.cmd_new
= qmp_marshal_input_balloon
,
834 Request VM to change its memory
allocation (in bytes
).
838 - "value": New memory
allocation (json
-int
)
842 -> { "execute": "balloon", "arguments": { "value": 536870912 } }
849 .args_type
= "name:s,up:b",
850 .mhandler
.cmd_new
= qmp_marshal_input_set_link
,
857 Change the link status of a network adapter
.
861 - "name": network device
name (json
-string
)
862 - "up": status is
up (json
-bool
)
866 -> { "execute": "set_link", "arguments": { "name": "e1000.0", "up": false } }
873 .args_type
= "fdname:s",
874 .params
= "getfd name",
875 .help
= "receive a file descriptor via SCM rights and assign it a name",
876 .mhandler
.cmd_new
= qmp_marshal_input_getfd
,
883 Receive a file descriptor via SCM rights and assign it a name
.
887 - "fdname": file descriptor
name (json
-string
)
891 -> { "execute": "getfd", "arguments": { "fdname": "fd1" } }
896 (1) If the name specified by the
"fdname" argument already exists
,
897 the file descriptor assigned to it will be closed and replaced
898 by the received file descriptor
.
899 (2) The
'closefd' command can be used to explicitly close the file
900 descriptor when it is no longer needed
.
906 .args_type
= "fdname:s",
907 .params
= "closefd name",
908 .help
= "close a file descriptor previously passed via SCM rights",
909 .mhandler
.cmd_new
= qmp_marshal_input_closefd
,
916 Close a file descriptor previously passed via SCM rights
.
920 - "fdname": file descriptor
name (json
-string
)
924 -> { "execute": "closefd", "arguments": { "fdname": "fd1" } }
930 .name
= "block_passwd",
931 .args_type
= "device:B,password:s",
932 .mhandler
.cmd_new
= qmp_marshal_input_block_passwd
,
939 Set the password of encrypted block devices
.
943 - "device": device
name (json
-string
)
944 - "password": password (json
-string
)
948 -> { "execute": "block_passwd", "arguments": { "device": "ide0-hd0",
949 "password": "12345" } }
955 .name
= "block_set_io_throttle",
956 .args_type
= "device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l",
957 .mhandler
.cmd_new
= qmp_marshal_input_block_set_io_throttle
,
961 block_set_io_throttle
964 Change I
/O throttle limits
for a block drive
.
968 - "device": device
name (json
-string
)
969 - "bps": total throughput limit
in bytes per
second(json
-int
)
970 - "bps_rd": read throughput limit
in bytes per
second(json
-int
)
971 - "bps_wr": read throughput limit
in bytes per
second(json
-int
)
972 - "iops": total I
/O operations per
second(json
-int
)
973 - "iops_rd": read I
/O operations per
second(json
-int
)
974 - "iops_wr": write I
/O operations per
second(json
-int
)
978 -> { "execute": "block_set_io_throttle", "arguments": { "device": "virtio0",
990 .name
= "set_password",
991 .args_type
= "protocol:s,password:s,connected:s?",
992 .mhandler
.cmd_new
= qmp_marshal_input_set_password
,
999 Set the password
for vnc
/spice protocols
.
1003 - "protocol": protocol
name (json
-string
)
1004 - "password": password (json
-string
)
1005 - "connected": [ keep | disconnect | fail
] (josn
-string
, optional
)
1009 -> { "execute": "set_password", "arguments": { "protocol": "vnc",
1010 "password": "secret" } }
1016 .name
= "expire_password",
1017 .args_type
= "protocol:s,time:s",
1018 .mhandler
.cmd_new
= qmp_marshal_input_expire_password
,
1025 Set the password expire time
for vnc
/spice protocols
.
1029 - "protocol": protocol
name (json
-string
)
1030 - "time": [ now |
never |
+secs | secs
] (json
-string
)
1034 -> { "execute": "expire_password", "arguments": { "protocol": "vnc",
1041 .name
= "add_client",
1042 .args_type
= "protocol:s,fdname:s,skipauth:b?,tls:b?",
1043 .params
= "protocol fdname skipauth tls",
1044 .help
= "add a graphics client",
1045 .user_print
= monitor_user_noop
,
1046 .mhandler
.cmd_new
= add_graphics_client
,
1053 Add a graphics client
1057 - "protocol": protocol
name (json
-string
)
1058 - "fdname": file descriptor
name (json
-string
)
1059 - "skipauth": whether to skip
authentication (json
-bool
, optional
)
1060 - "tls": whether to perform
TLS (json
-bool
, optional
)
1064 -> { "execute": "add_client", "arguments": { "protocol": "vnc",
1065 "fdname": "myclient" } }
1070 .name
= "qmp_capabilities",
1073 .help
= "enable QMP capabilities",
1074 .user_print
= monitor_user_noop
,
1075 .mhandler
.cmd_new
= do_qmp_capabilities
,
1082 Enable QMP capabilities
.
1088 -> { "execute": "qmp_capabilities" }
1091 Note
: This command must be issued before issuing any other command
.
1096 .name
= "human-monitor-command",
1097 .args_type
= "command-line:s,cpu-index:i?",
1098 .mhandler
.cmd_new
= qmp_marshal_input_human_monitor_command
,
1102 human
-monitor
-command
1103 ---------------------
1105 Execute a Human Monitor command
.
1109 - command
-line
: the command name and its arguments
, just like the
1110 Human Monitor
's shell (json-string)
1111 - cpu-index: select the CPU number to be used by commands which access CPU
1112 data, like 'info registers
'. The Monitor selects CPU 0 if this
1113 argument is not provided (json-int, optional)
1117 -> { "execute": "human-monitor-command", "arguments": { "command-line": "info kvm" } }
1118 <- { "return": "kvm support: enabled\r\n" }
1122 (1) The Human Monitor is NOT an stable interface, this means that command
1123 names, arguments and responses can change or be removed at ANY time.
1124 Applications that rely on long term stability guarantees should NOT
1129 o This command is stateless, this means that commands that depend
1130 on state information (such as getfd) might not work
1132 o Commands that prompt the user for data (eg. 'cont
' when the block
1133 device is encrypted) don't currently work
1138 HXCOMM Each query command below is inside a SQMP
/EQMP section
, do NOT change
1139 HXCOMM
this! We will possibly move query commands definitions inside those
1140 HXCOMM sections
, just like regular commands
.
1150 Return a json
-object with the following information
:
1152 - "qemu": A json
-object containing three integer values
:
1153 - "major": QEMU
's major version (json-int)
1154 - "minor": QEMU's minor
version (json
-int
)
1155 - "micro": QEMU
's micro version (json-int)
1156 - "package": package's
version (json
-string
)
1160 -> { "execute": "query-version" }
1175 .name
= "query-version",
1177 .mhandler
.cmd_new
= qmp_marshal_input_query_version
,
1184 List QMP available commands
.
1186 Each command is represented by a json
-object
, the returned value is a json
-array
1189 Each json
-object contain
:
1191 - "name": command
's name (json-string)
1195 -> { "execute": "query-commands" }
1199 "name":"query-balloon"
1202 "name":"system_powerdown"
1207 Note: This example has been shortened as the real response is too long.
1212 .name = "query-commands",
1214 .mhandler.cmd_new = qmp_marshal_input_query_commands,
1221 List QMP available events.
1223 Each event is represented by a json-object, the returned value is a json-array
1226 Each json-object contains:
1228 - "name": event's
name (json
-string
)
1232 -> { "execute": "query-events" }
1244 Note
: This example has been shortened as the real response is too long
.
1249 .name
= "query-events",
1251 .mhandler
.cmd_new
= qmp_marshal_input_query_events
,
1258 Each device is represented by a json
-object
. The returned value is a json
-array
1261 Each json
-object contain the following
:
1263 - "label": device
's label (json-string)
1264 - "filename": device's
file (json
-string
)
1268 -> { "execute": "query-chardev" }
1285 .name
= "query-chardev",
1287 .mhandler
.cmd_new
= qmp_marshal_input_query_chardev
,
1294 Show the block devices
.
1296 Each block device information is stored
in a json
-object and the returned value
1297 is a json
-array of all devices
.
1299 Each json
-object contain the following
:
1301 - "device": device
name (json
-string
)
1302 - "type": device
type (json
-string
)
1303 - deprecated
, retained
for backward compatibility
1304 - Possible values
: "unknown"
1305 - "removable": true if the device is removable
, false otherwise (json
-bool
)
1306 - "locked": true if the device is locked
, false otherwise (json
-bool
)
1307 - "tray-open": only present
if removable
, true if the device has a tray
,
1308 and it is
open (json
-bool
)
1309 - "inserted": only present
if the device is inserted
, it is a json
-object
1310 containing the following
:
1311 - "file": device file
name (json
-string
)
1312 - "ro": true if read
-only
, false otherwise (json
-bool
)
1313 - "drv": driver format
name (json
-string
)
1314 - Possible values
: "blkdebug", "bochs", "cloop", "cow", "dmg",
1315 "file", "file", "ftp", "ftps", "host_cdrom",
1316 "host_device", "host_floppy", "http", "https",
1317 "nbd", "parallels", "qcow", "qcow2", "raw",
1318 "tftp", "vdi", "vmdk", "vpc", "vvfat"
1319 - "backing_file": backing file
name (json
-string
, optional
)
1320 - "backing_file_depth": number of files
in the backing file
chain (json
-int
)
1321 - "encrypted": true if encrypted
, false otherwise (json
-bool
)
1322 - "bps": limit total bytes per
second (json
-int
)
1323 - "bps_rd": limit read bytes per
second (json
-int
)
1324 - "bps_wr": limit write bytes per
second (json
-int
)
1325 - "iops": limit total I
/O operations per
second (json
-int
)
1326 - "iops_rd": limit read operations per
second (json
-int
)
1327 - "iops_wr": limit write operations per
second (json
-int
)
1329 - "io-status": I
/O operation status
, only present
if the device supports it
1330 and the VM is configured to stop on errors
. It
's always reset
1331 to "ok" when the "cont" command is issued (json_string, optional)
1332 - Possible values: "ok", "failed", "nospace"
1336 -> { "execute": "query-block" }
1341 "device":"ide0-hd0",
1348 "file":"disks/test.img",
1349 "backing_file_depth":0,
1361 "device":"ide1-cd0",
1384 .name = "query-block",
1386 .mhandler.cmd_new = qmp_marshal_input_query_block,
1393 Show block device statistics.
1395 Each device statistic information is stored in a json-object and the returned
1396 value is a json-array of all devices.
1398 Each json-object contain the following:
1400 - "device": device name (json-string)
1401 - "stats": A json-object with the statistics information, it contains:
1402 - "rd_bytes": bytes read (json-int)
1403 - "wr_bytes": bytes written (json-int)
1404 - "rd_operations": read operations (json-int)
1405 - "wr_operations": write operations (json-int)
1406 - "flush_operations": cache flush operations (json-int)
1407 - "wr_total_time_ns": total time spend on writes in nano-seconds (json-int)
1408 - "rd_total_time_ns": total time spend on reads in nano-seconds (json-int)
1409 - "flush_total_time_ns": total time spend on cache flushes in nano-seconds (json-int)
1410 - "wr_highest_offset": Highest offset of a sector written since the
1411 BlockDriverState has been opened (json-int)
1412 - "parent": Contains recursively the statistics of the underlying
1413 protocol (e.g. the host file for a qcow2 image). If there is
1414 no underlying protocol, this field is omitted
1415 (json-object, optional)
1419 -> { "execute": "query-blockstats" }
1423 "device":"ide0-hd0",
1426 "wr_highest_offset":3686448128,
1428 "wr_operations":751,
1429 "rd_bytes":122567168,
1430 "rd_operations":36772
1431 "wr_total_times_ns":313253456
1432 "rd_total_times_ns":3465673657
1433 "flush_total_times_ns":49653
1434 "flush_operations":61,
1438 "wr_highest_offset":2821110784,
1440 "wr_operations":692,
1441 "rd_bytes":122739200,
1442 "rd_operations":36604
1443 "flush_operations":51,
1444 "wr_total_times_ns":313253456
1445 "rd_total_times_ns":3465673657
1446 "flush_total_times_ns":49653
1450 "device":"ide1-cd0",
1452 "wr_highest_offset":0,
1457 "flush_operations":0,
1458 "wr_total_times_ns":0
1459 "rd_total_times_ns":0
1460 "flush_total_times_ns":0
1466 "wr_highest_offset":0,
1471 "flush_operations":0,
1472 "wr_total_times_ns":0
1473 "rd_total_times_ns":0
1474 "flush_total_times_ns":0
1480 "wr_highest_offset":0,
1485 "flush_operations":0,
1486 "wr_total_times_ns":0
1487 "rd_total_times_ns":0
1488 "flush_total_times_ns":0
1497 .name = "query-blockstats",
1499 .mhandler.cmd_new = qmp_marshal_input_query_blockstats,
1506 Show CPU information.
1508 Return a json-array. Each CPU is represented by a json-object, which contains:
1510 - "CPU": CPU index (json-int)
1511 - "current": true if this is the current CPU, false otherwise (json-bool)
1512 - "halted": true if the cpu is halted, false otherwise (json-bool)
1513 - Current program counter. The key's name depends on the architecture
:
1514 "pc": i386
/x86_64 (json
-int
)
1515 "nip": PPC (json
-int
)
1516 "pc" and
"npc": sparc (json
-int
)
1517 "PC": mips (json
-int
)
1518 - "thread_id": ID of the underlying host
thread (json
-int
)
1522 -> { "execute": "query-cpus" }
1545 .name
= "query-cpus",
1547 .mhandler
.cmd_new
= qmp_marshal_input_query_cpus
,
1554 PCI buses and devices information
.
1556 The returned value is a json
-array of all buses
. Each bus is represented by
1557 a json
-object
, which has a key with a json
-array of all PCI devices attached
1558 to it
. Each device is represented by a json
-object
.
1560 The bus json
-object contains the following
:
1562 - "bus": bus
number (json
-int
)
1563 - "devices": a json
-array of json
-objects
, each json
-object represents a
1566 The PCI device json
-object contains the following
:
1568 - "bus": identical to the parent
's bus number (json-int)
1569 - "slot": slot number (json-int)
1570 - "function": function number (json-int)
1571 - "class_info": a json-object containing:
1572 - "desc": device class description (json-string, optional)
1573 - "class": device class number (json-int)
1574 - "id": a json-object containing:
1575 - "device": device ID (json-int)
1576 - "vendor": vendor ID (json-int)
1577 - "irq": device's IRQ
if assigned (json
-int
, optional
)
1578 - "qdev_id": qdev id
string (json
-string
)
1579 - "pci_bridge": It
's a json-object, only present if this device is a
1580 PCI bridge, contains:
1581 - "bus": bus number (json-int)
1582 - "secondary": secondary bus number (json-int)
1583 - "subordinate": subordinate bus number (json-int)
1584 - "io_range": I/O memory range information, a json-object with the
1586 - "base": base address, in bytes (json-int)
1587 - "limit": limit address, in bytes (json-int)
1588 - "memory_range": memory range information, a json-object with the
1590 - "base": base address, in bytes (json-int)
1591 - "limit": limit address, in bytes (json-int)
1592 - "prefetchable_range": Prefetchable memory range information, a
1593 json-object with the following members:
1594 - "base": base address, in bytes (json-int)
1595 - "limit": limit address, in bytes (json-int)
1596 - "devices": a json-array of PCI devices if there's any attached
, each
1597 each element is represented by a json
-object
, which contains
1598 the same members of the
'PCI device json-object' described
1600 - "regions": a json
-array of json
-objects
, each json
-object represents a
1601 memory region of
this device
1603 The memory range json
-object contains the following
:
1605 - "base": base memory
address (json
-int
)
1606 - "limit": limit
value (json
-int
)
1608 The region json
-object can be an I
/O region or a memory region
, an I
/O region
1609 json
-object contains the following
:
1611 - "type": "io" (json
-string
, fixed
)
1612 - "bar": BAR
number (json
-int
)
1613 - "address": memory
address (json
-int
)
1614 - "size": memory
size (json
-int
)
1616 A memory region json
-object contains the following
:
1618 - "type": "memory" (json
-string
, fixed
)
1619 - "bar": BAR
number (json
-int
)
1620 - "address": memory
address (json
-int
)
1621 - "size": memory
size (json
-int
)
1622 - "mem_type_64": true or
false (json
-bool
)
1623 - "prefetch": true or
false (json
-bool
)
1627 -> { "execute": "query-pci" }
1639 "desc":"Host bridge"
1673 "desc":"IDE controller"
1695 "desc":"VGA controller"
1705 "mem_type_64":false,
1708 "address":4026531840,
1713 "mem_type_64":false,
1716 "address":4060086272,
1721 "mem_type_64":false,
1736 "desc":"RAM controller"
1757 Note
: This example has been shortened as the real response is too long
.
1762 .name
= "query-pci",
1764 .mhandler
.cmd_new
= qmp_marshal_input_query_pci
,
1771 Show KVM information
.
1773 Return a json
-object with the following information
:
1775 - "enabled": true if KVM support is enabled
, false otherwise (json
-bool
)
1776 - "present": true if QEMU has KVM support
, false otherwise (json
-bool
)
1780 -> { "execute": "query-kvm" }
1781 <- { "return": { "enabled": true, "present": true } }
1786 .name
= "query-kvm",
1788 .mhandler
.cmd_new
= qmp_marshal_input_query_kvm
,
1795 Return a json
-object with the following information
:
1797 - "running": true if the VM is running
, or
false if it is
paused (json
-bool
)
1798 - "singlestep": true if the VM is
in single step mode
,
1799 false otherwise (json
-bool
)
1800 - "status": one of the following
values (json
-string
)
1801 "debug" - QEMU is running on a debugger
1802 "inmigrate" - guest is paused waiting
for an incoming migration
1803 "internal-error" - An internal error that prevents further guest
1804 execution has occurred
1805 "io-error" - the last IOP has failed and the device is configured
1806 to pause on I
/O errors
1807 "paused" - guest has been paused via the
'stop' command
1808 "postmigrate" - guest is paused following a successful
'migrate'
1809 "prelaunch" - QEMU was started with
-S and guest has not started
1810 "finish-migrate" - guest is paused to finish the migration process
1811 "restore-vm" - guest is paused to restore VM state
1812 "running" - guest is actively running
1813 "save-vm" - guest is paused to save the VM state
1814 "shutdown" - guest is shut
down (and
-no
-shutdown is
in use
)
1815 "watchdog" - the watchdog action is configured to pause and
1820 -> { "execute": "query-status" }
1821 <- { "return": { "running": true, "singlestep": false, "status": "running" } }
1826 .name
= "query-status",
1828 .mhandler
.cmd_new
= qmp_marshal_input_query_status
,
1835 Show VM mice information
.
1837 Each mouse is represented by a json
-object
, the returned value is a json
-array
1840 The mouse json
-object contains the following
:
1842 - "name": mouse
's name (json-string)
1843 - "index": mouse's
index (json
-int
)
1844 - "current": true if this mouse is receiving events
, false otherwise (json
-bool
)
1845 - "absolute": true if the mouse generates absolute input
events (json
-bool
)
1849 -> { "execute": "query-mice" }
1853 "name":"QEMU Microsoft Mouse",
1859 "name":"QEMU PS/2 Mouse",
1870 .name
= "query-mice",
1872 .mhandler
.cmd_new
= qmp_marshal_input_query_mice
,
1879 Show VNC server information
.
1881 Return a json
-object with server information
. Connected clients are returned
1882 as a json
-array of json
-objects
.
1884 The main json
-object contains the following
:
1886 - "enabled": true or
false (json
-bool
)
1887 - "host": server
's IP address (json-string)
1888 - "family": address family (json-string)
1889 - Possible values: "ipv4", "ipv6", "unix", "unknown"
1890 - "service": server's port
number (json
-string
)
1891 - "auth": authentication
method (json
-string
)
1892 - Possible values
: "invalid", "none", "ra2", "ra2ne", "sasl", "tight",
1893 "tls", "ultra", "unknown", "vencrypt", "vencrypt",
1894 "vencrypt+plain", "vencrypt+tls+none",
1895 "vencrypt+tls+plain", "vencrypt+tls+sasl",
1896 "vencrypt+tls+vnc", "vencrypt+x509+none",
1897 "vencrypt+x509+plain", "vencrypt+x509+sasl",
1898 "vencrypt+x509+vnc", "vnc"
1899 - "clients": a json
-array of all connected clients
1901 Clients are described by a json
-object
, each one contain the following
:
1903 - "host": client
's IP address (json-string)
1904 - "family": address family (json-string)
1905 - Possible values: "ipv4", "ipv6", "unix", "unknown"
1906 - "service": client's port
number (json
-string
)
1907 - "x509_dname": TLS
dname (json
-string
, optional
)
1908 - "sasl_username": SASL
username (json
-string
, optional
)
1912 -> { "execute": "query-vnc" }
1933 .name
= "query-vnc",
1935 .mhandler
.cmd_new
= qmp_marshal_input_query_vnc
,
1942 Show SPICE server information
.
1944 Return a json
-object with server information
. Connected clients are returned
1945 as a json
-array of json
-objects
.
1947 The main json
-object contains the following
:
1949 - "enabled": true or
false (json
-bool
)
1950 - "host": server
's IP address (json-string)
1951 - "port": server's port
number (json
-int
, optional
)
1952 - "tls-port": server
's port number (json-int, optional)
1953 - "auth": authentication method (json-string)
1954 - Possible values: "none", "spice"
1955 - "channels": a json-array of all active channels clients
1957 Channels are described by a json-object, each one contain the following:
1959 - "host": client's IP
address (json
-string
)
1960 - "family": address
family (json
-string
)
1961 - Possible values
: "ipv4", "ipv6", "unix", "unknown"
1962 - "port": client
's port number (json-string)
1963 - "connection-id": spice connection id. All channels with the same id
1964 belong to the same spice session (json-int)
1965 - "channel-type": channel type. "1" is the main control channel, filter for
1966 this one if you want track spice sessions only (json-int)
1967 - "channel-id": channel id. Usually "0", might be different needed when
1968 multiple channels of the same type exist, such as multiple
1969 display channels in a multihead setup (json-int)
1970 - "tls": whevener the channel is encrypted (json-bool)
1974 -> { "execute": "query-spice" }
1987 "connection-id": 1804289383,
1988 "host": "127.0.0.1",
1996 "connection-id": 1804289383,
1997 "host": "127.0.0.1",
2001 [ ... more channels follow ... ]
2008 #if defined(CONFIG_SPICE)
2010 .name = "query-spice",
2012 .mhandler.cmd_new = qmp_marshal_input_query_spice,
2022 Return a json-object with the following information:
2024 - "name": VM's
name (json
-string
, optional
)
2028 -> { "execute": "query-name" }
2029 <- { "return": { "name": "qemu-name" } }
2034 .name
= "query-name",
2036 .mhandler
.cmd_new
= qmp_marshal_input_query_name
,
2045 Return a json
-object with the following information
:
2047 - "UUID": Universally Unique
Identifier (json
-string
)
2051 -> { "execute": "query-uuid" }
2052 <- { "return": { "UUID": "550e8400-e29b-41d4-a716-446655440000" } }
2057 .name
= "query-uuid",
2059 .mhandler
.cmd_new
= qmp_marshal_input_query_uuid
,
2068 Return a json
-object
. If migration is active there will be another json
-object
2069 with RAM migration status and
if block migration is active another one with
2070 block migration status
.
2072 The main json
-object contains the following
:
2074 - "status": migration
status (json
-string
)
2075 - Possible values
: "active", "completed", "failed", "cancelled"
2076 - "ram": only present
if "status" is
"active", it is a json
-object with the
2077 following RAM
information (in bytes
):
2078 - "transferred": amount
transferred (json
-int
)
2079 - "remaining": amount
remaining (json
-int
)
2080 - "total": total (json
-int
)
2081 - "disk": only present
if "status" is
"active" and it is a block migration
,
2082 it is a json
-object with the following disk
information (in bytes
):
2083 - "transferred": amount
transferred (json
-int
)
2084 - "remaining": amount
remaining (json
-int
)
2085 - "total": total (json
-int
)
2089 1. Before the first migration
2091 -> { "execute": "query-migrate" }
2094 2. Migration is done and has succeeded
2096 -> { "execute": "query-migrate" }
2097 <- { "return": { "status": "completed" } }
2099 3. Migration is done and has failed
2101 -> { "execute": "query-migrate" }
2102 <- { "return": { "status": "failed" } }
2104 4. Migration is being performed and is not a block migration
:
2106 -> { "execute": "query-migrate" }
2118 5. Migration is being performed and is a block migration
:
2120 -> { "execute": "query-migrate" }
2126 "remaining":1053304,
2131 "remaining":20880384,
2140 .name
= "query-migrate",
2142 .mhandler
.cmd_new
= qmp_marshal_input_query_migrate
,
2149 Show balloon information
.
2151 Make an asynchronous request
for balloon info
. When the request completes a
2152 json
-object will be returned containing the following data
:
2154 - "actual": current balloon value
in bytes (json
-int
)
2155 - "mem_swapped_in": Amount of memory swapped
in bytes (json
-int
, optional
)
2156 - "mem_swapped_out": Amount of memory swapped out
in bytes (json
-int
, optional
)
2157 - "major_page_faults": Number of major
faults (json
-int
, optional
)
2158 - "minor_page_faults": Number of minor
faults (json
-int
, optional
)
2159 - "free_mem": Total amount of free and unused memory
in
2160 bytes (json
-int
, optional
)
2161 - "total_mem": Total amount of available memory
in bytes (json
-int
, optional
)
2165 -> { "execute": "query-balloon" }
2168 "actual":1073741824,
2170 "mem_swapped_out":0,
2171 "major_page_faults":142,
2172 "minor_page_faults":239245,
2173 "free_mem":1014185984,
2174 "total_mem":1044668416
2181 .name
= "query-balloon",
2183 .mhandler
.cmd_new
= qmp_marshal_input_query_balloon
,
2187 .name
= "query-block-jobs",
2189 .mhandler
.cmd_new
= qmp_marshal_input_query_block_jobs
,
2194 .args_type
= "path:s",
2195 .mhandler
.cmd_new
= qmp_marshal_input_qom_list
,
2200 .args_type
= "path:s,property:s,value:q",
2201 .mhandler
.cmd_new
= qmp_qom_set
,
2206 .args_type
= "path:s,property:s",
2207 .mhandler
.cmd_new
= qmp_qom_get
,
2211 .name
= "change-vnc-password",
2212 .args_type
= "password:s",
2213 .mhandler
.cmd_new
= qmp_marshal_input_change_vnc_password
,
2216 .name
= "qom-list-types",
2217 .args_type
= "implements:s?,abstract:b?",
2218 .mhandler
.cmd_new
= qmp_marshal_input_qom_list_types
,