qmp-commands.hx

   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.
   4
   5 SQMP
   6                         QMP Supported Commands
   7                         ----------------------
   8
   9 This document describes all commands currently supported by QMP.
  10
  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.
  14
  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.
  18
  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.
  22
  23 Also, the following notation is used to denote data flow:
  24
  25 -> data issued by the Client
  26 <- Server data response
  27
  28 Please, refer to the QMP specification (QMP/qmp-spec.txt) for detailed
  29 information on the Server command and response formats.
  30
  31 NOTE: This document is temporary and will be replaced soon.
  32
  33 1. Stability Considerations
  34 ===========================
  35
  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.
  39
  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.
  42
  43 If you're planning to adopt QMP, please observe the following:
  44
  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
  47        QEMU is available
  48
  49     2. DO NOT rely on anything which is not explicit documented
  50
  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)
  54
  55 2. Regular Commands
  56 ===================
  57
  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.
  60
  61 EQMP
  62
  63     {
  64         .name       = "quit",
  65         .args_type  = "",
  66         .mhandler.cmd_new = qmp_marshal_input_quit,
  67     },
  68
  69 SQMP
  70 quit
  71 ----
  72
  73 Quit the emulator.
  74
  75 Arguments: None.
  76
  77 Example:
  78
  79 -> { "execute": "quit" }
  80 <- { "return": {} }
  81
  82 EQMP
  83
  84     {
  85         .name       = "eject",
  86         .args_type  = "force:-f,device:B",
  87         .mhandler.cmd_new = qmp_marshal_input_eject,
  88     },
  89
  90 SQMP
  91 eject
  92 -----
  93
  94 Eject a removable medium.
  95
  96 Arguments:
  97
  98 - force: force ejection (json-bool, optional)
  99 - device: device name (json-string)
 100
 101 Example:
 102
 103 -> { "execute": "eject", "arguments": { "device": "ide1-cd0" } }
 104 <- { "return": {} }
 105
 106 Note: The "force" argument defaults to false.
 107
 108 EQMP
 109
 110     {
 111         .name       = "change",
 112         .args_type  = "device:B,target:F,arg:s?",
 113         .mhandler.cmd_new = qmp_marshal_input_change,
 114     },
 115
 116 SQMP
 117 change
 118 ------
 119
 120 Change a removable medium or VNC configuration.
 121
 122 Arguments:
 123
 124 - "device": device name (json-string)
 125 - "target": filename or item (json-string)
 126 - "arg": additional argument (json-string, optional)
 127
 128 Examples:
 129
 130 1. Change a removable medium
 131
 132 -> { "execute": "change",
 133              "arguments": { "device": "ide1-cd0",
 134                             "target": "/srv/images/Fedora-12-x86_64-DVD.iso" } }
 135 <- { "return": {} }
 136
 137 2. Change VNC password
 138
 139 -> { "execute": "change",
 140              "arguments": { "device": "vnc", "target": "password",
 141                             "arg": "foobar1" } }
 142 <- { "return": {} }
 143
 144 EQMP
 145
 146     {
 147         .name       = "screendump",
 148         .args_type  = "filename:F",
 149         .mhandler.cmd_new = qmp_marshal_input_screendump,
 150     },
 151
 152 SQMP
 153 screendump
 154 ----------
 155
 156 Save screen into PPM image.
 157
 158 Arguments:
 159
 160 - "filename": file path (json-string)
 161
 162 Example:
 163
 164 -> { "execute": "screendump", "arguments": { "filename": "/tmp/image" } }
 165 <- { "return": {} }
 166
 167 EQMP
 168
 169     {
 170         .name       = "stop",
 171         .args_type  = "",
 172         .mhandler.cmd_new = qmp_marshal_input_stop,
 173     },
 174
 175 SQMP
 176 stop
 177 ----
 178
 179 Stop the emulator.
 180
 181 Arguments: None.
 182
 183 Example:
 184
 185 -> { "execute": "stop" }
 186 <- { "return": {} }
 187
 188 EQMP
 189
 190     {
 191         .name       = "cont",
 192         .args_type  = "",
 193         .mhandler.cmd_new = qmp_marshal_input_cont,
 194     },
 195
 196 SQMP
 197 cont
 198 ----
 199
 200 Resume emulation.
 201
 202 Arguments: None.
 203
 204 Example:
 205
 206 -> { "execute": "cont" }
 207 <- { "return": {} }
 208
 209 EQMP
 210
 211     {
 212         .name       = "system_wakeup",
 213         .args_type  = "",
 214         .mhandler.cmd_new = qmp_marshal_input_system_wakeup,
 215     },
 216
 217 SQMP
 218 system_wakeup
 219 -------------
 220
 221 Wakeup guest from suspend.
 222
 223 Arguments: None.
 224
 225 Example:
 226
 227 -> { "execute": "system_wakeup" }
 228 <- { "return": {} }
 229
 230 EQMP
 231
 232     {
 233         .name       = "system_reset",
 234         .args_type  = "",
 235         .mhandler.cmd_new = qmp_marshal_input_system_reset,
 236     },
 237
 238 SQMP
 239 system_reset
 240 ------------
 241
 242 Reset the system.
 243
 244 Arguments: None.
 245
 246 Example:
 247
 248 -> { "execute": "system_reset" }
 249 <- { "return": {} }
 250
 251 EQMP
 252
 253     {
 254         .name       = "system_powerdown",
 255         .args_type  = "",
 256         .mhandler.cmd_new = qmp_marshal_input_system_powerdown,
 257     },
 258
 259 SQMP
 260 system_powerdown
 261 ----------------
 262
 263 Send system power down event.
 264
 265 Arguments: None.
 266
 267 Example:
 268
 269 -> { "execute": "system_powerdown" }
 270 <- { "return": {} }
 271
 272 EQMP
 273
 274     {
 275         .name       = "device_add",
 276         .args_type  = "device:O",
 277         .params     = "driver[,prop=value][,...]",
 278         .help       = "add device, like -device on the command line",
 279         .user_print = monitor_user_noop,
 280         .mhandler.cmd_new = do_device_add,
 281     },
 282
 283 SQMP
 284 device_add
 285 ----------
 286
 287 Add a device.
 288
 289 Arguments:
 290
 291 - "driver": the name of the new device's driver (json-string)
 292 - "bus": the device's parent bus (device tree path, json-string, optional)
 293 - "id": the device's ID, must be unique (json-string)
 294 - device properties
 295
 296 Example:
 297
 298 -> { "execute": "device_add", "arguments": { "driver": "e1000", "id": "net1" } }
 299 <- { "return": {} }
 300
 301 Notes:
 302
 303 (1) For detailed information about this command, please refer to the
 304     'docs/qdev-device-use.txt' file.
 305
 306 (2) It's possible to list device properties by running QEMU with the
 307     "-device DEVICE,\?" command-line argument, where DEVICE is the device's name
 308
 309 EQMP
 310
 311     {
 312         .name       = "device_del",
 313         .args_type  = "id:s",
 314         .mhandler.cmd_new = qmp_marshal_input_device_del,
 315     },
 316
 317 SQMP
 318 device_del
 319 ----------
 320
 321 Remove a device.
 322
 323 Arguments:
 324
 325 - "id": the device's ID (json-string)
 326
 327 Example:
 328
 329 -> { "execute": "device_del", "arguments": { "id": "net1" } }
 330 <- { "return": {} }
 331
 332 EQMP
 333
 334     {
 335         .name       = "send-key",
 336         .args_type  = "keys:O,hold-time:i?",
 337         .mhandler.cmd_new = qmp_marshal_input_send_key,
 338     },
 339
 340 SQMP
 341 send-key
 342 ----------
 343
 344 Send keys to VM.
 345
 346 Arguments:
 347
 348 keys array:
 349     - "key": key sequence (a json-array of key union values,
 350              union can be number or qcode enum)
 351
 352 - hold-time: time to delay key up events, milliseconds. Defaults to 100
 353              (json-int, optional)
 354
 355 Example:
 356
 357 -> { "execute": "send-key",
 358      "arguments": { "keys": [ { "type": "qcode", "data": "ctrl" },
 359                               { "type": "qcode", "data": "alt" },
 360                               { "type": "qcode", "data": "delete" } ] } }
 361 <- { "return": {} }
 362
 363 EQMP
 364
 365     {
 366         .name       = "cpu",
 367         .args_type  = "index:i",
 368         .mhandler.cmd_new = qmp_marshal_input_cpu,
 369     },
 370
 371 SQMP
 372 cpu
 373 ---
 374
 375 Set the default CPU.
 376
 377 Arguments:
 378
 379 - "index": the CPU's index (json-int)
 380
 381 Example:
 382
 383 -> { "execute": "cpu", "arguments": { "index": 0 } }
 384 <- { "return": {} }
 385
 386 Note: CPUs' indexes are obtained with the 'query-cpus' command.
 387
 388 EQMP
 389
 390     {
 391         .name       = "cpu-add",
 392         .args_type  = "id:i",
 393         .mhandler.cmd_new = qmp_marshal_input_cpu_add,
 394     },
 395
 396 SQMP
 397 cpu-add
 398 -------
 399
 400 Adds virtual cpu
 401
 402 Arguments:
 403
 404 - "id": cpu id (json-int)
 405
 406 Example:
 407
 408 -> { "execute": "cpu-add", "arguments": { "id": 2 } }
 409 <- { "return": {} }
 410
 411 EQMP
 412
 413     {
 414         .name       = "memsave",
 415         .args_type  = "val:l,size:i,filename:s,cpu:i?",
 416         .mhandler.cmd_new = qmp_marshal_input_memsave,
 417     },
 418
 419 SQMP
 420 memsave
 421 -------
 422
 423 Save to disk virtual memory dump starting at 'val' of size 'size'.
 424
 425 Arguments:
 426
 427 - "val": the starting address (json-int)
 428 - "size": the memory size, in bytes (json-int)
 429 - "filename": file path (json-string)
 430 - "cpu": virtual CPU index (json-int, optional)
 431
 432 Example:
 433
 434 -> { "execute": "memsave",
 435              "arguments": { "val": 10,
 436                             "size": 100,
 437                             "filename": "/tmp/virtual-mem-dump" } }
 438 <- { "return": {} }
 439
 440 EQMP
 441
 442     {
 443         .name       = "pmemsave",
 444         .args_type  = "val:l,size:i,filename:s",
 445         .mhandler.cmd_new = qmp_marshal_input_pmemsave,
 446     },
 447
 448 SQMP
 449 pmemsave
 450 --------
 451
 452 Save to disk physical memory dump starting at 'val' of size 'size'.
 453
 454 Arguments:
 455
 456 - "val": the starting address (json-int)
 457 - "size": the memory size, in bytes (json-int)
 458 - "filename": file path (json-string)
 459
 460 Example:
 461
 462 -> { "execute": "pmemsave",
 463              "arguments": { "val": 10,
 464                             "size": 100,
 465                             "filename": "/tmp/physical-mem-dump" } }
 466 <- { "return": {} }
 467
 468 EQMP
 469
 470     {
 471         .name       = "inject-nmi",
 472         .args_type  = "",
 473         .mhandler.cmd_new = qmp_marshal_input_inject_nmi,
 474     },
 475
 476 SQMP
 477 inject-nmi
 478 ----------
 479
 480 Inject an NMI on guest's CPUs.
 481
 482 Arguments: None.
 483
 484 Example:
 485
 486 -> { "execute": "inject-nmi" }
 487 <- { "return": {} }
 488
 489 Note: inject-nmi fails when the guest doesn't support injecting.
 490       Currently, only x86 (NMI) and s390x (RESTART) guests do.
 491
 492 EQMP
 493
 494     {
 495         .name       = "ringbuf-write",
 496         .args_type  = "device:s,data:s,format:s?",
 497         .mhandler.cmd_new = qmp_marshal_input_ringbuf_write,
 498     },
 499
 500 SQMP
 501 ringbuf-write
 502 -------------
 503
 504 Write to a ring buffer character device.
 505
 506 Arguments:
 507
 508 - "device": ring buffer character device name (json-string)
 509 - "data": data to write (json-string)
 510 - "format": data format (json-string, optional)
 511           - Possible values: "utf8" (default), "base64"
 512             Bug: invalid base64 is currently not rejected.
 513             Whitespace *is* invalid.
 514
 515 Example:
 516
 517 -> { "execute": "ringbuf-write",
 518                 "arguments": { "device": "foo",
 519                                "data": "abcdefgh",
 520                                "format": "utf8" } }
 521 <- { "return": {} }
 522
 523 EQMP
 524
 525     {
 526         .name       = "ringbuf-read",
 527         .args_type  = "device:s,size:i,format:s?",
 528         .mhandler.cmd_new = qmp_marshal_input_ringbuf_read,
 529     },
 530
 531 SQMP
 532 ringbuf-read
 533 -------------
 534
 535 Read from a ring buffer character device.
 536
 537 Arguments:
 538
 539 - "device": ring buffer character device name (json-string)
 540 - "size": how many bytes to read at most (json-int)
 541           - Number of data bytes, not number of characters in encoded data
 542 - "format": data format (json-string, optional)
 543           - Possible values: "utf8" (default), "base64"
 544           - Naturally, format "utf8" works only when the ring buffer
 545             contains valid UTF-8 text.  Invalid UTF-8 sequences get
 546             replaced.  Bug: replacement doesn't work.  Bug: can screw
 547             up on encountering NUL characters, after the ring buffer
 548             lost data, and when reading stops because the size limit
 549             is reached.
 550
 551 Example:
 552
 553 -> { "execute": "ringbuf-read",
 554                 "arguments": { "device": "foo",
 555                                "size": 1000,
 556                                "format": "utf8" } }
 557 <- {"return": "abcdefgh"}
 558
 559 EQMP
 560
 561     {
 562         .name       = "xen-save-devices-state",
 563         .args_type  = "filename:F",
 564     .mhandler.cmd_new = qmp_marshal_input_xen_save_devices_state,
 565     },
 566
 567 SQMP
 568 xen-save-devices-state
 569 -------
 570
 571 Save the state of all devices to file. The RAM and the block devices
 572 of the VM are not saved by this command.
 573
 574 Arguments:
 575
 576 - "filename": the file to save the state of the devices to as binary
 577 data. See xen-save-devices-state.txt for a description of the binary
 578 format.
 579
 580 Example:
 581
 582 -> { "execute": "xen-save-devices-state",
 583      "arguments": { "filename": "/tmp/save" } }
 584 <- { "return": {} }
 585
 586 EQMP
 587
 588     {
 589         .name       = "xen-set-global-dirty-log",
 590         .args_type  = "enable:b",
 591         .mhandler.cmd_new = qmp_marshal_input_xen_set_global_dirty_log,
 592     },
 593
 594 SQMP
 595 xen-set-global-dirty-log
 596 -------
 597
 598 Enable or disable the global dirty log mode.
 599
 600 Arguments:
 601
 602 - "enable": Enable it or disable it.
 603
 604 Example:
 605
 606 -> { "execute": "xen-set-global-dirty-log",
 607      "arguments": { "enable": true } }
 608 <- { "return": {} }
 609
 610 EQMP
 611
 612     {
 613         .name       = "migrate",
 614         .args_type  = "detach:-d,blk:-b,inc:-i,uri:s",
 615         .mhandler.cmd_new = qmp_marshal_input_migrate,
 616     },
 617
 618 SQMP
 619 migrate
 620 -------
 621
 622 Migrate to URI.
 623
 624 Arguments:
 625
 626 - "blk": block migration, full disk copy (json-bool, optional)
 627 - "inc": incremental disk copy (json-bool, optional)
 628 - "uri": Destination URI (json-string)
 629
 630 Example:
 631
 632 -> { "execute": "migrate", "arguments": { "uri": "tcp:0:4446" } }
 633 <- { "return": {} }
 634
 635 Notes:
 636
 637 (1) The 'query-migrate' command should be used to check migration's progress
 638     and final result (this information is provided by the 'status' member)
 639 (2) All boolean arguments default to false
 640 (3) The user Monitor's "detach" argument is invalid in QMP and should not
 641     be used
 642
 643 EQMP
 644
 645     {
 646         .name       = "migrate_cancel",
 647         .args_type  = "",
 648         .mhandler.cmd_new = qmp_marshal_input_migrate_cancel,
 649     },
 650
 651 SQMP
 652 migrate_cancel
 653 --------------
 654
 655 Cancel the current migration.
 656
 657 Arguments: None.
 658
 659 Example:
 660
 661 -> { "execute": "migrate_cancel" }
 662 <- { "return": {} }
 663
 664 EQMP
 665 {
 666         .name       = "migrate-set-cache-size",
 667         .args_type  = "value:o",
 668         .mhandler.cmd_new = qmp_marshal_input_migrate_set_cache_size,
 669     },
 670
 671 SQMP
 672 migrate-set-cache-size
 673 ----------------------
 674
 675 Set cache size to be used by XBZRLE migration, the cache size will be rounded
 676 down to the nearest power of 2
 677
 678 Arguments:
 679
 680 - "value": cache size in bytes (json-int)
 681
 682 Example:
 683
 684 -> { "execute": "migrate-set-cache-size", "arguments": { "value": 536870912 } }
 685 <- { "return": {} }
 686
 687 EQMP
 688     {
 689         .name       = "query-migrate-cache-size",
 690         .args_type  = "",
 691         .mhandler.cmd_new = qmp_marshal_input_query_migrate_cache_size,
 692     },
 693
 694 SQMP
 695 query-migrate-cache-size
 696 ------------------------
 697
 698 Show cache size to be used by XBZRLE migration
 699
 700 returns a json-object with the following information:
 701 - "size" : json-int
 702
 703 Example:
 704
 705 -> { "execute": "query-migrate-cache-size" }
 706 <- { "return": 67108864 }
 707
 708 EQMP
 709
 710     {
 711         .name       = "migrate_set_speed",
 712         .args_type  = "value:o",
 713         .mhandler.cmd_new = qmp_marshal_input_migrate_set_speed,
 714     },
 715
 716 SQMP
 717 migrate_set_speed
 718 -----------------
 719
 720 Set maximum speed for migrations.
 721
 722 Arguments:
 723
 724 - "value": maximum speed, in bytes per second (json-int)
 725
 726 Example:
 727
 728 -> { "execute": "migrate_set_speed", "arguments": { "value": 1024 } }
 729 <- { "return": {} }
 730
 731 EQMP
 732
 733     {
 734         .name       = "migrate_set_downtime",
 735         .args_type  = "value:T",
 736         .mhandler.cmd_new = qmp_marshal_input_migrate_set_downtime,
 737     },
 738
 739 SQMP
 740 migrate_set_downtime
 741 --------------------
 742
 743 Set maximum tolerated downtime (in seconds) for migrations.
 744
 745 Arguments:
 746
 747 - "value": maximum downtime (json-number)
 748
 749 Example:
 750
 751 -> { "execute": "migrate_set_downtime", "arguments": { "value": 0.1 } }
 752 <- { "return": {} }
 753
 754 EQMP
 755
 756     {
 757         .name       = "client_migrate_info",
 758         .args_type  = "protocol:s,hostname:s,port:i?,tls-port:i?,cert-subject:s?",
 759         .params     = "protocol hostname port tls-port cert-subject",
 760         .help       = "send migration info to spice/vnc client",
 761         .user_print = monitor_user_noop,
 762         .mhandler.cmd_async = client_migrate_info,
 763         .flags      = MONITOR_CMD_ASYNC,
 764     },
 765
 766 SQMP
 767 client_migrate_info
 768 ------------------
 769
 770 Set the spice/vnc connection info for the migration target.  The spice/vnc
 771 server will ask the spice/vnc client to automatically reconnect using the
 772 new parameters (if specified) once the vm migration finished successfully.
 773
 774 Arguments:
 775
 776 - "protocol":     protocol: "spice" or "vnc" (json-string)
 777 - "hostname":     migration target hostname (json-string)
 778 - "port":         spice/vnc tcp port for plaintext channels (json-int, optional)
 779 - "tls-port":     spice tcp port for tls-secured channels (json-int, optional)
 780 - "cert-subject": server certificate subject (json-string, optional)
 781
 782 Example:
 783
 784 -> { "execute": "client_migrate_info",
 785      "arguments": { "protocol": "spice",
 786                     "hostname": "virt42.lab.kraxel.org",
 787                     "port": 1234 } }
 788 <- { "return": {} }
 789
 790 EQMP
 791
 792     {
 793         .name       = "dump-guest-memory",
 794         .args_type  = "paging:b,protocol:s,begin:i?,end:i?",
 795         .params     = "-p protocol [begin] [length]",
 796         .help       = "dump guest memory to file",
 797         .user_print = monitor_user_noop,
 798         .mhandler.cmd_new = qmp_marshal_input_dump_guest_memory,
 799     },
 800
 801 SQMP
 802 dump
 803
 804
 805 Dump guest memory to file. The file can be processed with crash or gdb.
 806
 807 Arguments:
 808
 809 - "paging": do paging to get guest's memory mapping (json-bool)
 810 - "protocol": destination file(started with "file:") or destination file
 811               descriptor (started with "fd:") (json-string)
 812 - "begin": the starting physical address. It's optional, and should be specified
 813            with length together (json-int)
 814 - "length": the memory size, in bytes. It's optional, and should be specified
 815             with begin together (json-int)
 816
 817 Example:
 818
 819 -> { "execute": "dump-guest-memory", "arguments": { "protocol": "fd:dump" } }
 820 <- { "return": {} }
 821
 822 Notes:
 823
 824 (1) All boolean arguments default to false
 825
 826 EQMP
 827
 828     {
 829         .name       = "netdev_add",
 830         .args_type  = "netdev:O",
 831         .mhandler.cmd_new = qmp_netdev_add,
 832     },
 833
 834 SQMP
 835 netdev_add
 836 ----------
 837
 838 Add host network device.
 839
 840 Arguments:
 841
 842 - "type": the device type, "tap", "user", ... (json-string)
 843 - "id": the device's ID, must be unique (json-string)
 844 - device options
 845
 846 Example:
 847
 848 -> { "execute": "netdev_add", "arguments": { "type": "user", "id": "netdev1" } }
 849 <- { "return": {} }
 850
 851 Note: The supported device options are the same ones supported by the '-netdev'
 852       command-line argument, which are listed in the '-help' output or QEMU's
 853       manual
 854
 855 EQMP
 856
 857     {
 858         .name       = "netdev_del",
 859         .args_type  = "id:s",
 860         .mhandler.cmd_new = qmp_marshal_input_netdev_del,
 861     },
 862
 863 SQMP
 864 netdev_del
 865 ----------
 866
 867 Remove host network device.
 868
 869 Arguments:
 870
 871 - "id": the device's ID, must be unique (json-string)
 872
 873 Example:
 874
 875 -> { "execute": "netdev_del", "arguments": { "id": "netdev1" } }
 876 <- { "return": {} }
 877
 878
 879 EQMP
 880
 881     {
 882         .name       = "object-add",
 883         .args_type  = "qom-type:s,id:s,props:q?",
 884         .mhandler.cmd_new = qmp_object_add,
 885     },
 886
 887 SQMP
 888 object-add
 889 ----------
 890
 891 Create QOM object.
 892
 893 Arguments:
 894
 895 - "qom-type": the object's QOM type, i.e. the class name (json-string)
 896 - "id": the object's ID, must be unique (json-string)
 897 - "props": a dictionary of object property values (optional, json-dict)
 898
 899 Example:
 900
 901 -> { "execute": "object-add", "arguments": { "qom-type": "rng-random", "id": "rng1",
 902      "props": { "filename": "/dev/hwrng" } } }
 903 <- { "return": {} }
 904
 905 EQMP
 906
 907     {
 908         .name       = "object-del",
 909         .args_type  = "id:s",
 910         .mhandler.cmd_new = qmp_marshal_input_object_del,
 911     },
 912
 913 SQMP
 914 object-del
 915 ----------
 916
 917 Remove QOM object.
 918
 919 Arguments:
 920
 921 - "id": the object's ID (json-string)
 922
 923 Example:
 924
 925 -> { "execute": "object-del", "arguments": { "id": "rng1" } }
 926 <- { "return": {} }
 927
 928
 929 EQMP
 930
 931
 932     {
 933         .name       = "block_resize",
 934         .args_type  = "device:B,size:o",
 935         .mhandler.cmd_new = qmp_marshal_input_block_resize,
 936     },
 937
 938 SQMP
 939 block_resize
 940 ------------
 941
 942 Resize a block image while a guest is running.
 943
 944 Arguments:
 945
 946 - "device": the device's ID, must be unique (json-string)
 947 - "size": new size
 948
 949 Example:
 950
 951 -> { "execute": "block_resize", "arguments": { "device": "scratch", "size": 1073741824 } }
 952 <- { "return": {} }
 953
 954 EQMP
 955
 956     {
 957         .name       = "block-stream",
 958         .args_type  = "device:B,base:s?,speed:o?,on-error:s?",
 959         .mhandler.cmd_new = qmp_marshal_input_block_stream,
 960     },
 961
 962     {
 963         .name       = "block-commit",
 964         .args_type  = "device:B,base:s?,top:s,speed:o?",
 965         .mhandler.cmd_new = qmp_marshal_input_block_commit,
 966     },
 967
 968     {
 969         .name       = "drive-backup",
 970         .args_type  = "sync:s,device:B,target:s,speed:i?,mode:s?,format:s?,"
 971                       "on-source-error:s?,on-target-error:s?",
 972         .mhandler.cmd_new = qmp_marshal_input_drive_backup,
 973     },
 974
 975 SQMP
 976 drive-backup
 977 ------------
 978
 979 Start a point-in-time copy of a block device to a new destination.  The
 980 status of ongoing drive-backup operations can be checked with
 981 query-block-jobs where the BlockJobInfo.type field has the value 'backup'.
 982 The operation can be stopped before it has completed using the
 983 block-job-cancel command.
 984
 985 Arguments:
 986
 987 - "device": the name of the device which should be copied.
 988             (json-string)
 989 - "target": the target of the new image. If the file exists, or if it is a
 990             device, the existing file/device will be used as the new
 991             destination.  If it does not exist, a new file will be created.
 992             (json-string)
 993 - "format": the format of the new destination, default is to probe if 'mode' is
 994             'existing', else the format of the source
 995             (json-string, optional)
 996 - "sync": what parts of the disk image should be copied to the destination;
 997   possibilities include "full" for all the disk, "top" for only the sectors
 998   allocated in the topmost image, or "none" to only replicate new I/O
 999   (MirrorSyncMode).
1000 - "mode": whether and how QEMU should create a new image
1001           (NewImageMode, optional, default 'absolute-paths')
1002 - "speed": the maximum speed, in bytes per second (json-int, optional)
1003 - "on-source-error": the action to take on an error on the source, default
1004                      'report'.  'stop' and 'enospc' can only be used
1005                      if the block device supports io-status.
1006                      (BlockdevOnError, optional)
1007 - "on-target-error": the action to take on an error on the target, default
1008                      'report' (no limitations, since this applies to
1009                      a different block device than device).
1010                      (BlockdevOnError, optional)
1011
1012 Example:
1013 -> { "execute": "drive-backup", "arguments": { "device": "drive0",
1014                                                "sync": "full",
1015                                                "target": "backup.img" } }
1016 <- { "return": {} }
1017 EQMP
1018
1019     {
1020         .name       = "block-job-set-speed",
1021         .args_type  = "device:B,speed:o",
1022         .mhandler.cmd_new = qmp_marshal_input_block_job_set_speed,
1023     },
1024
1025     {
1026         .name       = "block-job-cancel",
1027         .args_type  = "device:B,force:b?",
1028         .mhandler.cmd_new = qmp_marshal_input_block_job_cancel,
1029     },
1030     {
1031         .name       = "block-job-pause",
1032         .args_type  = "device:B",
1033         .mhandler.cmd_new = qmp_marshal_input_block_job_pause,
1034     },
1035     {
1036         .name       = "block-job-resume",
1037         .args_type  = "device:B",
1038         .mhandler.cmd_new = qmp_marshal_input_block_job_resume,
1039     },
1040     {
1041         .name       = "block-job-complete",
1042         .args_type  = "device:B",
1043         .mhandler.cmd_new = qmp_marshal_input_block_job_complete,
1044     },
1045     {
1046         .name       = "transaction",
1047         .args_type  = "actions:q",
1048         .mhandler.cmd_new = qmp_marshal_input_transaction,
1049     },
1050
1051 SQMP
1052 transaction
1053 -----------
1054
1055 Atomically operate on one or more block devices.  The only supported operations
1056 for now are drive-backup, internal and external snapshotting.  A list of
1057 dictionaries is accepted, that contains the actions to be performed.
1058 If there is any failure performing any of the operations, all operations
1059 for the group are abandoned.
1060
1061 For external snapshots, the dictionary contains the device, the file to use for
1062 the new snapshot, and the format.  The default format, if not specified, is
1063 qcow2.
1064
1065 Each new snapshot defaults to being created by QEMU (wiping any
1066 contents if the file already exists), but it is also possible to reuse
1067 an externally-created file.  In the latter case, you should ensure that
1068 the new image file has the same contents as the current one; QEMU cannot
1069 perform any meaningful check.  Typically this is achieved by using the
1070 current image file as the backing file for the new image.
1071
1072 On failure, the original disks pre-snapshot attempt will be used.
1073
1074 For internal snapshots, the dictionary contains the device and the snapshot's
1075 name.  If an internal snapshot matching name already exists, the request will
1076 be rejected.  Only some image formats support it, for example, qcow2, rbd,
1077 and sheepdog.
1078
1079 On failure, qemu will try delete the newly created internal snapshot in the
1080 transaction.  When an I/O error occurs during deletion, the user needs to fix
1081 it later with qemu-img or other command.
1082
1083 Arguments:
1084
1085 actions array:
1086     - "type": the operation to perform.  The only supported
1087       value is "blockdev-snapshot-sync". (json-string)
1088     - "data": a dictionary.  The contents depend on the value
1089       of "type".  When "type" is "blockdev-snapshot-sync":
1090       - "device": device name to snapshot (json-string)
1091       - "snapshot-file": name of new image file (json-string)
1092       - "format": format of new image (json-string, optional)
1093       - "mode": whether and how QEMU should create the snapshot file
1094         (NewImageMode, optional, default "absolute-paths")
1095       When "type" is "blockdev-snapshot-internal-sync":
1096       - "device": device name to snapshot (json-string)
1097       - "name": name of the new snapshot (json-string)
1098
1099 Example:
1100
1101 -> { "execute": "transaction",
1102      "arguments": { "actions": [
1103          { 'type': 'blockdev-snapshot-sync', 'data' : { "device": "ide-hd0",
1104                                          "snapshot-file": "/some/place/my-image",
1105                                          "format": "qcow2" } },
1106          { 'type': 'blockdev-snapshot-sync', 'data' : { "device": "ide-hd1",
1107                                          "snapshot-file": "/some/place/my-image2",
1108                                          "mode": "existing",
1109                                          "format": "qcow2" } },
1110          { 'type': 'blockdev-snapshot-internal-sync', 'data' : {
1111                                          "device": "ide-hd2",
1112                                          "name": "snapshot0" } } ] } }
1113 <- { "return": {} }
1114
1115 EQMP
1116
1117     {
1118         .name       = "blockdev-snapshot-sync",
1119         .args_type  = "device:B,snapshot-file:s,format:s?,mode:s?",
1120         .mhandler.cmd_new = qmp_marshal_input_blockdev_snapshot_sync,
1121     },
1122
1123 SQMP
1124 blockdev-snapshot-sync
1125 ----------------------
1126
1127 Synchronous snapshot of a block device. snapshot-file specifies the
1128 target of the new image. If the file exists, or if it is a device, the
1129 snapshot will be created in the existing file/device. If does not
1130 exist, a new file will be created. format specifies the format of the
1131 snapshot image, default is qcow2.
1132
1133 Arguments:
1134
1135 - "device": device name to snapshot (json-string)
1136 - "snapshot-file": name of new image file (json-string)
1137 - "mode": whether and how QEMU should create the snapshot file
1138   (NewImageMode, optional, default "absolute-paths")
1139 - "format": format of new image (json-string, optional)
1140
1141 Example:
1142
1143 -> { "execute": "blockdev-snapshot-sync", "arguments": { "device": "ide-hd0",
1144                                                          "snapshot-file":
1145                                                         "/some/place/my-image",
1146                                                         "format": "qcow2" } }
1147 <- { "return": {} }
1148
1149 EQMP
1150
1151     {
1152         .name       = "blockdev-snapshot-internal-sync",
1153         .args_type  = "device:B,name:s",
1154         .mhandler.cmd_new = qmp_marshal_input_blockdev_snapshot_internal_sync,
1155     },
1156
1157 SQMP
1158 blockdev-snapshot-internal-sync
1159 -------------------------------
1160
1161 Synchronously take an internal snapshot of a block device when the format of
1162 image used supports it.  If the name is an empty string, or a snapshot with
1163 name already exists, the operation will fail.
1164
1165 Arguments:
1166
1167 - "device": device name to snapshot (json-string)
1168 - "name": name of the new snapshot (json-string)
1169
1170 Example:
1171
1172 -> { "execute": "blockdev-snapshot-internal-sync",
1173                 "arguments": { "device": "ide-hd0",
1174                                "name": "snapshot0" }
1175    }
1176 <- { "return": {} }
1177
1178 EQMP
1179
1180     {
1181         .name       = "blockdev-snapshot-delete-internal-sync",
1182         .args_type  = "device:B,id:s?,name:s?",
1183         .mhandler.cmd_new =
1184                       qmp_marshal_input_blockdev_snapshot_delete_internal_sync,
1185     },
1186
1187 SQMP
1188 blockdev-snapshot-delete-internal-sync
1189 --------------------------------------
1190
1191 Synchronously delete an internal snapshot of a block device when the format of
1192 image used supports it.  The snapshot is identified by name or id or both.  One
1193 of name or id is required.  If the snapshot is not found, the operation will
1194 fail.
1195
1196 Arguments:
1197
1198 - "device": device name (json-string)
1199 - "id": ID of the snapshot (json-string, optional)
1200 - "name": name of the snapshot (json-string, optional)
1201
1202 Example:
1203
1204 -> { "execute": "blockdev-snapshot-delete-internal-sync",
1205                 "arguments": { "device": "ide-hd0",
1206                                "name": "snapshot0" }
1207    }
1208 <- { "return": {
1209                    "id": "1",
1210                    "name": "snapshot0",
1211                    "vm-state-size": 0,
1212                    "date-sec": 1000012,
1213                    "date-nsec": 10,
1214                    "vm-clock-sec": 100,
1215                    "vm-clock-nsec": 20
1216      }
1217    }
1218
1219 EQMP
1220
1221     {
1222         .name       = "drive-mirror",
1223         .args_type  = "sync:s,device:B,target:s,speed:i?,mode:s?,format:s?,"
1224                       "on-source-error:s?,on-target-error:s?,"
1225                       "granularity:i?,buf-size:i?",
1226         .mhandler.cmd_new = qmp_marshal_input_drive_mirror,
1227     },
1228
1229 SQMP
1230 drive-mirror
1231 ------------
1232
1233 Start mirroring a block device's writes to a new destination. target
1234 specifies the target of the new image. If the file exists, or if it is
1235 a device, it will be used as the new destination for writes. If it does not
1236 exist, a new file will be created. format specifies the format of the
1237 mirror image, default is to probe if mode='existing', else the format
1238 of the source.
1239
1240 Arguments:
1241
1242 - "device": device name to operate on (json-string)
1243 - "target": name of new image file (json-string)
1244 - "format": format of new image (json-string, optional)
1245 - "mode": how an image file should be created into the target
1246   file/device (NewImageMode, optional, default 'absolute-paths')
1247 - "speed": maximum speed of the streaming job, in bytes per second
1248   (json-int)
1249 - "granularity": granularity of the dirty bitmap, in bytes (json-int, optional)
1250 - "buf_size": maximum amount of data in flight from source to target, in bytes
1251   (json-int, default 10M)
1252 - "sync": what parts of the disk image should be copied to the destination;
1253   possibilities include "full" for all the disk, "top" for only the sectors
1254   allocated in the topmost image, or "none" to only replicate new I/O
1255   (MirrorSyncMode).
1256 - "on-source-error": the action to take on an error on the source
1257   (BlockdevOnError, default 'report')
1258 - "on-target-error": the action to take on an error on the target
1259   (BlockdevOnError, default 'report')
1260
1261 The default value of the granularity is the image cluster size clamped
1262 between 4096 and 65536, if the image format defines one.  If the format
1263 does not define a cluster size, the default value of the granularity
1264 is 65536.
1265
1266
1267 Example:
1268
1269 -> { "execute": "drive-mirror", "arguments": { "device": "ide-hd0",
1270                                                "target": "/some/place/my-image",
1271                                                "sync": "full",
1272                                                "format": "qcow2" } }
1273 <- { "return": {} }
1274
1275 EQMP
1276
1277     {
1278         .name       = "balloon",
1279         .args_type  = "value:M",
1280         .mhandler.cmd_new = qmp_marshal_input_balloon,
1281     },
1282
1283 SQMP
1284 balloon
1285 -------
1286
1287 Request VM to change its memory allocation (in bytes).
1288
1289 Arguments:
1290
1291 - "value": New memory allocation (json-int)
1292
1293 Example:
1294
1295 -> { "execute": "balloon", "arguments": { "value": 536870912 } }
1296 <- { "return": {} }
1297
1298 EQMP
1299
1300     {
1301         .name       = "set_link",
1302         .args_type  = "name:s,up:b",
1303         .mhandler.cmd_new = qmp_marshal_input_set_link,
1304     },
1305
1306 SQMP
1307 set_link
1308 --------
1309
1310 Change the link status of a network adapter.
1311
1312 Arguments:
1313
1314 - "name": network device name (json-string)
1315 - "up": status is up (json-bool)
1316
1317 Example:
1318
1319 -> { "execute": "set_link", "arguments": { "name": "e1000.0", "up": false } }
1320 <- { "return": {} }
1321
1322 EQMP
1323
1324     {
1325         .name       = "getfd",
1326         .args_type  = "fdname:s",
1327         .params     = "getfd name",
1328         .help       = "receive a file descriptor via SCM rights and assign it a name",
1329         .mhandler.cmd_new = qmp_marshal_input_getfd,
1330     },
1331
1332 SQMP
1333 getfd
1334 -----
1335
1336 Receive a file descriptor via SCM rights and assign it a name.
1337
1338 Arguments:
1339
1340 - "fdname": file descriptor name (json-string)
1341
1342 Example:
1343
1344 -> { "execute": "getfd", "arguments": { "fdname": "fd1" } }
1345 <- { "return": {} }
1346
1347 Notes:
1348
1349 (1) If the name specified by the "fdname" argument already exists,
1350     the file descriptor assigned to it will be closed and replaced
1351     by the received file descriptor.
1352 (2) The 'closefd' command can be used to explicitly close the file
1353     descriptor when it is no longer needed.
1354
1355 EQMP
1356
1357     {
1358         .name       = "closefd",
1359         .args_type  = "fdname:s",
1360         .params     = "closefd name",
1361         .help       = "close a file descriptor previously passed via SCM rights",
1362         .mhandler.cmd_new = qmp_marshal_input_closefd,
1363     },
1364
1365 SQMP
1366 closefd
1367 -------
1368
1369 Close a file descriptor previously passed via SCM rights.
1370
1371 Arguments:
1372
1373 - "fdname": file descriptor name (json-string)
1374
1375 Example:
1376
1377 -> { "execute": "closefd", "arguments": { "fdname": "fd1" } }
1378 <- { "return": {} }
1379
1380 EQMP
1381
1382      {
1383         .name       = "add-fd",
1384         .args_type  = "fdset-id:i?,opaque:s?",
1385         .params     = "add-fd fdset-id opaque",
1386         .help       = "Add a file descriptor, that was passed via SCM rights, to an fd set",
1387         .mhandler.cmd_new = qmp_marshal_input_add_fd,
1388     },
1389
1390 SQMP
1391 add-fd
1392 -------
1393
1394 Add a file descriptor, that was passed via SCM rights, to an fd set.
1395
1396 Arguments:
1397
1398 - "fdset-id": The ID of the fd set to add the file descriptor to.
1399               (json-int, optional)
1400 - "opaque": A free-form string that can be used to describe the fd.
1401             (json-string, optional)
1402
1403 Return a json-object with the following information:
1404
1405 - "fdset-id": The ID of the fd set that the fd was added to. (json-int)
1406 - "fd": The file descriptor that was received via SCM rights and added to the
1407         fd set. (json-int)
1408
1409 Example:
1410
1411 -> { "execute": "add-fd", "arguments": { "fdset-id": 1 } }
1412 <- { "return": { "fdset-id": 1, "fd": 3 } }
1413
1414 Notes:
1415
1416 (1) The list of fd sets is shared by all monitor connections.
1417 (2) If "fdset-id" is not specified, a new fd set will be created.
1418
1419 EQMP
1420
1421      {
1422         .name       = "remove-fd",
1423         .args_type  = "fdset-id:i,fd:i?",
1424         .params     = "remove-fd fdset-id fd",
1425         .help       = "Remove a file descriptor from an fd set",
1426         .mhandler.cmd_new = qmp_marshal_input_remove_fd,
1427     },
1428
1429 SQMP
1430 remove-fd
1431 ---------
1432
1433 Remove a file descriptor from an fd set.
1434
1435 Arguments:
1436
1437 - "fdset-id": The ID of the fd set that the file descriptor belongs to.
1438               (json-int)
1439 - "fd": The file descriptor that is to be removed. (json-int, optional)
1440
1441 Example:
1442
1443 -> { "execute": "remove-fd", "arguments": { "fdset-id": 1, "fd": 3 } }
1444 <- { "return": {} }
1445
1446 Notes:
1447
1448 (1) The list of fd sets is shared by all monitor connections.
1449 (2) If "fd" is not specified, all file descriptors in "fdset-id" will be
1450     removed.
1451
1452 EQMP
1453
1454     {
1455         .name       = "query-fdsets",
1456         .args_type  = "",
1457         .help       = "Return information describing all fd sets",
1458         .mhandler.cmd_new = qmp_marshal_input_query_fdsets,
1459     },
1460
1461 SQMP
1462 query-fdsets
1463 -------------
1464
1465 Return information describing all fd sets.
1466
1467 Arguments: None
1468
1469 Example:
1470
1471 -> { "execute": "query-fdsets" }
1472 <- { "return": [
1473        {
1474          "fds": [
1475            {
1476              "fd": 30,
1477              "opaque": "rdonly:/path/to/file"
1478            },
1479            {
1480              "fd": 24,
1481              "opaque": "rdwr:/path/to/file"
1482            }
1483          ],
1484          "fdset-id": 1
1485        },
1486        {
1487          "fds": [
1488            {
1489              "fd": 28
1490            },
1491            {
1492              "fd": 29
1493            }
1494          ],
1495          "fdset-id": 0
1496        }
1497      ]
1498    }
1499
1500 Note: The list of fd sets is shared by all monitor connections.
1501
1502 EQMP
1503
1504     {
1505         .name       = "block_passwd",
1506         .args_type  = "device:B,password:s",
1507         .mhandler.cmd_new = qmp_marshal_input_block_passwd,
1508     },
1509
1510 SQMP
1511 block_passwd
1512 ------------
1513
1514 Set the password of encrypted block devices.
1515
1516 Arguments:
1517
1518 - "device": device name (json-string)
1519 - "password": password (json-string)
1520
1521 Example:
1522
1523 -> { "execute": "block_passwd", "arguments": { "device": "ide0-hd0",
1524                                                "password": "12345" } }
1525 <- { "return": {} }
1526
1527 EQMP
1528
1529     {
1530         .name       = "block_set_io_throttle",
1531         .args_type  = "device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l,bps_max:l?,bps_rd_max:l?,bps_wr_max:l?,iops_max:l?,iops_rd_max:l?,iops_wr_max:l?,iops_size:l?",
1532         .mhandler.cmd_new = qmp_marshal_input_block_set_io_throttle,
1533     },
1534
1535 SQMP
1536 block_set_io_throttle
1537 ------------
1538
1539 Change I/O throttle limits for a block drive.
1540
1541 Arguments:
1542
1543 - "device": device name (json-string)
1544 - "bps": total throughput limit in bytes per second (json-int)
1545 - "bps_rd": read throughput limit in bytes per second (json-int)
1546 - "bps_wr": write throughput limit in bytes per second (json-int)
1547 - "iops": total I/O operations per second (json-int)
1548 - "iops_rd": read I/O operations per second (json-int)
1549 - "iops_wr": write I/O operations per second (json-int)
1550 - "bps_max":  total max in bytes (json-int)
1551 - "bps_rd_max":  read max in bytes (json-int)
1552 - "bps_wr_max":  write max in bytes (json-int)
1553 - "iops_max":  total I/O operations max (json-int)
1554 - "iops_rd_max":  read I/O operations max (json-int)
1555 - "iops_wr_max":  write I/O operations max (json-int)
1556 - "iops_size":  I/O size in bytes when limiting (json-int)
1557
1558 Example:
1559
1560 -> { "execute": "block_set_io_throttle", "arguments": { "device": "virtio0",
1561                                                "bps": 1000000,
1562                                                "bps_rd": 0,
1563                                                "bps_wr": 0,
1564                                                "iops": 0,
1565                                                "iops_rd": 0,
1566                                                "iops_wr": 0,
1567                                                "bps_max": 8000000,
1568                                                "bps_rd_max": 0,
1569                                                "bps_wr_max": 0,
1570                                                "iops_max": 0,
1571                                                "iops_rd_max": 0,
1572                                                "iops_wr_max": 0,
1573                                                "iops_size": 0 } }
1574 <- { "return": {} }
1575
1576 EQMP
1577
1578     {
1579         .name       = "set_password",
1580         .args_type  = "protocol:s,password:s,connected:s?",
1581         .mhandler.cmd_new = qmp_marshal_input_set_password,
1582     },
1583
1584 SQMP
1585 set_password
1586 ------------
1587
1588 Set the password for vnc/spice protocols.
1589
1590 Arguments:
1591
1592 - "protocol": protocol name (json-string)
1593 - "password": password (json-string)
1594 - "connected": [ keep | disconnect | fail ] (josn-string, optional)
1595
1596 Example:
1597
1598 -> { "execute": "set_password", "arguments": { "protocol": "vnc",
1599                                                "password": "secret" } }
1600 <- { "return": {} }
1601
1602 EQMP
1603
1604     {
1605         .name       = "expire_password",
1606         .args_type  = "protocol:s,time:s",
1607         .mhandler.cmd_new = qmp_marshal_input_expire_password,
1608     },
1609
1610 SQMP
1611 expire_password
1612 ---------------
1613
1614 Set the password expire time for vnc/spice protocols.
1615
1616 Arguments:
1617
1618 - "protocol": protocol name (json-string)
1619 - "time": [ now | never | +secs | secs ] (json-string)
1620
1621 Example:
1622
1623 -> { "execute": "expire_password", "arguments": { "protocol": "vnc",
1624                                                   "time": "+60" } }
1625 <- { "return": {} }
1626
1627 EQMP
1628
1629     {
1630         .name       = "add_client",
1631         .args_type  = "protocol:s,fdname:s,skipauth:b?,tls:b?",
1632         .mhandler.cmd_new = qmp_marshal_input_add_client,
1633     },
1634
1635 SQMP
1636 add_client
1637 ----------
1638
1639 Add a graphics client
1640
1641 Arguments:
1642
1643 - "protocol": protocol name (json-string)
1644 - "fdname": file descriptor name (json-string)
1645 - "skipauth": whether to skip authentication (json-bool, optional)
1646 - "tls": whether to perform TLS (json-bool, optional)
1647
1648 Example:
1649
1650 -> { "execute": "add_client", "arguments": { "protocol": "vnc",
1651                                              "fdname": "myclient" } }
1652 <- { "return": {} }
1653
1654 EQMP
1655     {
1656         .name       = "qmp_capabilities",
1657         .args_type  = "",
1658         .params     = "",
1659         .help       = "enable QMP capabilities",
1660         .user_print = monitor_user_noop,
1661         .mhandler.cmd_new = do_qmp_capabilities,
1662     },
1663
1664 SQMP
1665 qmp_capabilities
1666 ----------------
1667
1668 Enable QMP capabilities.
1669
1670 Arguments: None.
1671
1672 Example:
1673
1674 -> { "execute": "qmp_capabilities" }
1675 <- { "return": {} }
1676
1677 Note: This command must be issued before issuing any other command.
1678
1679 EQMP
1680
1681     {
1682         .name       = "human-monitor-command",
1683         .args_type  = "command-line:s,cpu-index:i?",
1684         .mhandler.cmd_new = qmp_marshal_input_human_monitor_command,
1685     },
1686
1687 SQMP
1688 human-monitor-command
1689 ---------------------
1690
1691 Execute a Human Monitor command.
1692
1693 Arguments:
1694
1695 - command-line: the command name and its arguments, just like the
1696                 Human Monitor's shell (json-string)
1697 - cpu-index: select the CPU number to be used by commands which access CPU
1698              data, like 'info registers'. The Monitor selects CPU 0 if this
1699              argument is not provided (json-int, optional)
1700
1701 Example:
1702
1703 -> { "execute": "human-monitor-command", "arguments": { "command-line": "info kvm" } }
1704 <- { "return": "kvm support: enabled\r\n" }
1705
1706 Notes:
1707
1708 (1) The Human Monitor is NOT an stable interface, this means that command
1709     names, arguments and responses can change or be removed at ANY time.
1710     Applications that rely on long term stability guarantees should NOT
1711     use this command
1712
1713 (2) Limitations:
1714
1715     o This command is stateless, this means that commands that depend
1716       on state information (such as getfd) might not work
1717
1718     o Commands that prompt the user for data (eg. 'cont' when the block
1719       device is encrypted) don't currently work
1720
1721 3. Query Commands
1722 =================
1723
1724 HXCOMM Each query command below is inside a SQMP/EQMP section, do NOT change
1725 HXCOMM this! We will possibly move query commands definitions inside those
1726 HXCOMM sections, just like regular commands.
1727
1728 EQMP
1729
1730 SQMP
1731 query-version
1732 -------------
1733
1734 Show QEMU version.
1735
1736 Return a json-object with the following information:
1737
1738 - "qemu": A json-object containing three integer values:
1739     - "major": QEMU's major version (json-int)
1740     - "minor": QEMU's minor version (json-int)
1741     - "micro": QEMU's micro version (json-int)
1742 - "package": package's version (json-string)
1743
1744 Example:
1745
1746 -> { "execute": "query-version" }
1747 <- {
1748       "return":{
1749          "qemu":{
1750             "major":0,
1751             "minor":11,
1752             "micro":5
1753          },
1754          "package":""
1755       }
1756    }
1757
1758 EQMP
1759
1760     {
1761         .name       = "query-version",
1762         .args_type  = "",
1763         .mhandler.cmd_new = qmp_marshal_input_query_version,
1764     },
1765
1766 SQMP
1767 query-commands
1768 --------------
1769
1770 List QMP available commands.
1771
1772 Each command is represented by a json-object, the returned value is a json-array
1773 of all commands.
1774
1775 Each json-object contain:
1776
1777 - "name": command's name (json-string)
1778
1779 Example:
1780
1781 -> { "execute": "query-commands" }
1782 <- {
1783       "return":[
1784          {
1785             "name":"query-balloon"
1786          },
1787          {
1788             "name":"system_powerdown"
1789          }
1790       ]
1791    }
1792
1793 Note: This example has been shortened as the real response is too long.
1794
1795 EQMP
1796
1797     {
1798         .name       = "query-commands",
1799         .args_type  = "",
1800         .mhandler.cmd_new = qmp_marshal_input_query_commands,
1801     },
1802
1803 SQMP
1804 query-events
1805 --------------
1806
1807 List QMP available events.
1808
1809 Each event is represented by a json-object, the returned value is a json-array
1810 of all events.
1811
1812 Each json-object contains:
1813
1814 - "name": event's name (json-string)
1815
1816 Example:
1817
1818 -> { "execute": "query-events" }
1819 <- {
1820       "return":[
1821          {
1822             "name":"SHUTDOWN"
1823          },
1824          {
1825             "name":"RESET"
1826          }
1827       ]
1828    }
1829
1830 Note: This example has been shortened as the real response is too long.
1831
1832 EQMP
1833
1834     {
1835         .name       = "query-events",
1836         .args_type  = "",
1837         .mhandler.cmd_new = qmp_marshal_input_query_events,
1838     },
1839
1840 SQMP
1841 query-chardev
1842 -------------
1843
1844 Each device is represented by a json-object. The returned value is a json-array
1845 of all devices.
1846
1847 Each json-object contain the following:
1848
1849 - "label": device's label (json-string)
1850 - "filename": device's file (json-string)
1851
1852 Example:
1853
1854 -> { "execute": "query-chardev" }
1855 <- {
1856       "return":[
1857          {
1858             "label":"monitor",
1859             "filename":"stdio"
1860          },
1861          {
1862             "label":"serial0",
1863             "filename":"vc"
1864          }
1865       ]
1866    }
1867
1868 EQMP
1869
1870     {
1871         .name       = "query-chardev",
1872         .args_type  = "",
1873         .mhandler.cmd_new = qmp_marshal_input_query_chardev,
1874     },
1875
1876 SQMP
1877 query-block
1878 -----------
1879
1880 Show the block devices.
1881
1882 Each block device information is stored in a json-object and the returned value
1883 is a json-array of all devices.
1884
1885 Each json-object contain the following:
1886
1887 - "device": device name (json-string)
1888 - "type": device type (json-string)
1889          - deprecated, retained for backward compatibility
1890          - Possible values: "unknown"
1891 - "removable": true if the device is removable, false otherwise (json-bool)
1892 - "locked": true if the device is locked, false otherwise (json-bool)
1893 - "tray_open": only present if removable, true if the device has a tray,
1894                and it is open (json-bool)
1895 - "inserted": only present if the device is inserted, it is a json-object
1896    containing the following:
1897          - "file": device file name (json-string)
1898          - "ro": true if read-only, false otherwise (json-bool)
1899          - "drv": driver format name (json-string)
1900              - Possible values: "blkdebug", "bochs", "cloop", "cow", "dmg",
1901                                 "file", "file", "ftp", "ftps", "host_cdrom",
1902                                 "host_device", "host_floppy", "http", "https",
1903                                 "nbd", "parallels", "qcow", "qcow2", "raw",
1904                                 "tftp", "vdi", "vmdk", "vpc", "vvfat"
1905          - "backing_file": backing file name (json-string, optional)
1906          - "backing_file_depth": number of files in the backing file chain (json-int)
1907          - "encrypted": true if encrypted, false otherwise (json-bool)
1908          - "bps": limit total bytes per second (json-int)
1909          - "bps_rd": limit read bytes per second (json-int)
1910          - "bps_wr": limit write bytes per second (json-int)
1911          - "iops": limit total I/O operations per second (json-int)
1912          - "iops_rd": limit read operations per second (json-int)
1913          - "iops_wr": limit write operations per second (json-int)
1914          - "bps_max":  total max in bytes (json-int)
1915          - "bps_rd_max":  read max in bytes (json-int)
1916          - "bps_wr_max":  write max in bytes (json-int)
1917          - "iops_max":  total I/O operations max (json-int)
1918          - "iops_rd_max":  read I/O operations max (json-int)
1919          - "iops_wr_max":  write I/O operations max (json-int)
1920          - "iops_size": I/O size when limiting by iops (json-int)
1921          - "image": the detail of the image, it is a json-object containing
1922             the following:
1923              - "filename": image file name (json-string)
1924              - "format": image format (json-string)
1925              - "virtual-size": image capacity in bytes (json-int)
1926              - "dirty-flag": true if image is not cleanly closed, not present
1927                              means clean (json-bool, optional)
1928              - "actual-size": actual size on disk in bytes of the image, not
1929                               present when image does not support thin
1930                               provision (json-int, optional)
1931              - "cluster-size": size of a cluster in bytes, not present if image
1932                                format does not support it (json-int, optional)
1933              - "encrypted": true if the image is encrypted, not present means
1934                             false or the image format does not support
1935                             encryption (json-bool, optional)
1936              - "backing_file": backing file name, not present means no backing
1937                                file is used or the image format does not
1938                                support backing file chain
1939                                (json-string, optional)
1940              - "full-backing-filename": full path of the backing file, not
1941                                         present if it equals backing_file or no
1942                                         backing file is used
1943                                         (json-string, optional)
1944              - "backing-filename-format": the format of the backing file, not
1945                                           present means unknown or no backing
1946                                           file (json-string, optional)
1947              - "snapshots": the internal snapshot info, it is an optional list
1948                 of json-object containing the following:
1949                  - "id": unique snapshot id (json-string)
1950                  - "name": snapshot name (json-string)
1951                  - "vm-state-size": size of the VM state in bytes (json-int)
1952                  - "date-sec": UTC date of the snapshot in seconds (json-int)
1953                  - "date-nsec": fractional part in nanoseconds to be used with
1954                                 date-sec (json-int)
1955                  - "vm-clock-sec": VM clock relative to boot in seconds
1956                                    (json-int)
1957                  - "vm-clock-nsec": fractional part in nanoseconds to be used
1958                                     with vm-clock-sec (json-int)
1959              - "backing-image": the detail of the backing image, it is an
1960                                 optional json-object only present when a
1961                                 backing image present for this image
1962
1963 - "io-status": I/O operation status, only present if the device supports it
1964                and the VM is configured to stop on errors. It's always reset
1965                to "ok" when the "cont" command is issued (json_string, optional)
1966              - Possible values: "ok", "failed", "nospace"
1967
1968 Example:
1969
1970 -> { "execute": "query-block" }
1971 <- {
1972       "return":[
1973          {
1974             "io-status": "ok",
1975             "device":"ide0-hd0",
1976             "locked":false,
1977             "removable":false,
1978             "inserted":{
1979                "ro":false,
1980                "drv":"qcow2",
1981                "encrypted":false,
1982                "file":"disks/test.qcow2",
1983                "backing_file_depth":1,
1984                "bps":1000000,
1985                "bps_rd":0,
1986                "bps_wr":0,
1987                "iops":1000000,
1988                "iops_rd":0,
1989                "iops_wr":0,
1990                "bps_max": 8000000,
1991                "bps_rd_max": 0,
1992                "bps_wr_max": 0,
1993                "iops_max": 0,
1994                "iops_rd_max": 0,
1995                "iops_wr_max": 0,
1996                "iops_size": 0,
1997                "image":{
1998                   "filename":"disks/test.qcow2",
1999                   "format":"qcow2",
2000                   "virtual-size":2048000,
2001                   "backing_file":"base.qcow2",
2002                   "full-backing-filename":"disks/base.qcow2",
2003                   "backing-filename-format:"qcow2",
2004                   "snapshots":[
2005                      {
2006                         "id": "1",
2007                         "name": "snapshot1",
2008                         "vm-state-size": 0,
2009                         "date-sec": 10000200,
2010                         "date-nsec": 12,
2011                         "vm-clock-sec": 206,
2012                         "vm-clock-nsec": 30
2013                      }
2014                   ],
2015                   "backing-image":{
2016                       "filename":"disks/base.qcow2",
2017                       "format":"qcow2",
2018                       "virtual-size":2048000
2019                   }
2020                }
2021             },
2022             "type":"unknown"
2023          },
2024          {
2025             "io-status": "ok",
2026             "device":"ide1-cd0",
2027             "locked":false,
2028             "removable":true,
2029             "type":"unknown"
2030          },
2031          {
2032             "device":"floppy0",
2033             "locked":false,
2034             "removable":true,
2035             "type":"unknown"
2036          },
2037          {
2038             "device":"sd0",
2039             "locked":false,
2040             "removable":true,
2041             "type":"unknown"
2042          }
2043       ]
2044    }
2045
2046 EQMP
2047
2048     {
2049         .name       = "query-block",
2050         .args_type  = "",
2051         .mhandler.cmd_new = qmp_marshal_input_query_block,
2052     },
2053
2054 SQMP
2055 query-blockstats
2056 ----------------
2057
2058 Show block device statistics.
2059
2060 Each device statistic information is stored in a json-object and the returned
2061 value is a json-array of all devices.
2062
2063 Each json-object contain the following:
2064
2065 - "device": device name (json-string)
2066 - "stats": A json-object with the statistics information, it contains:
2067     - "rd_bytes": bytes read (json-int)
2068     - "wr_bytes": bytes written (json-int)
2069     - "rd_operations": read operations (json-int)
2070     - "wr_operations": write operations (json-int)
2071     - "flush_operations": cache flush operations (json-int)
2072     - "wr_total_time_ns": total time spend on writes in nano-seconds (json-int)
2073     - "rd_total_time_ns": total time spend on reads in nano-seconds (json-int)
2074     - "flush_total_time_ns": total time spend on cache flushes in nano-seconds (json-int)
2075     - "wr_highest_offset": Highest offset of a sector written since the
2076                            BlockDriverState has been opened (json-int)
2077 - "parent": Contains recursively the statistics of the underlying
2078             protocol (e.g. the host file for a qcow2 image). If there is
2079             no underlying protocol, this field is omitted
2080             (json-object, optional)
2081
2082 Example:
2083
2084 -> { "execute": "query-blockstats" }
2085 <- {
2086       "return":[
2087          {
2088             "device":"ide0-hd0",
2089             "parent":{
2090                "stats":{
2091                   "wr_highest_offset":3686448128,
2092                   "wr_bytes":9786368,
2093                   "wr_operations":751,
2094                   "rd_bytes":122567168,
2095                   "rd_operations":36772
2096                   "wr_total_times_ns":313253456
2097                   "rd_total_times_ns":3465673657
2098                   "flush_total_times_ns":49653
2099                   "flush_operations":61,
2100                }
2101             },
2102             "stats":{
2103                "wr_highest_offset":2821110784,
2104                "wr_bytes":9786368,
2105                "wr_operations":692,
2106                "rd_bytes":122739200,
2107                "rd_operations":36604
2108                "flush_operations":51,
2109                "wr_total_times_ns":313253456
2110                "rd_total_times_ns":3465673657
2111                "flush_total_times_ns":49653
2112             }
2113          },
2114          {
2115             "device":"ide1-cd0",
2116             "stats":{
2117                "wr_highest_offset":0,
2118                "wr_bytes":0,
2119                "wr_operations":0,
2120                "rd_bytes":0,
2121                "rd_operations":0
2122                "flush_operations":0,
2123                "wr_total_times_ns":0
2124                "rd_total_times_ns":0
2125                "flush_total_times_ns":0
2126             }
2127          },
2128          {
2129             "device":"floppy0",
2130             "stats":{
2131                "wr_highest_offset":0,
2132                "wr_bytes":0,
2133                "wr_operations":0,
2134                "rd_bytes":0,
2135                "rd_operations":0
2136                "flush_operations":0,
2137                "wr_total_times_ns":0
2138                "rd_total_times_ns":0
2139                "flush_total_times_ns":0
2140             }
2141          },
2142          {
2143             "device":"sd0",
2144             "stats":{
2145                "wr_highest_offset":0,
2146                "wr_bytes":0,
2147                "wr_operations":0,
2148                "rd_bytes":0,
2149                "rd_operations":0
2150                "flush_operations":0,
2151                "wr_total_times_ns":0
2152                "rd_total_times_ns":0
2153                "flush_total_times_ns":0
2154             }
2155          }
2156       ]
2157    }
2158
2159 EQMP
2160
2161     {
2162         .name       = "query-blockstats",
2163         .args_type  = "",
2164         .mhandler.cmd_new = qmp_marshal_input_query_blockstats,
2165     },
2166
2167 SQMP
2168 query-cpus
2169 ----------
2170
2171 Show CPU information.
2172
2173 Return a json-array. Each CPU is represented by a json-object, which contains:
2174
2175 - "CPU": CPU index (json-int)
2176 - "current": true if this is the current CPU, false otherwise (json-bool)
2177 - "halted": true if the cpu is halted, false otherwise (json-bool)
2178 - Current program counter. The key's name depends on the architecture:
2179      "pc": i386/x86_64 (json-int)
2180      "nip": PPC (json-int)
2181      "pc" and "npc": sparc (json-int)
2182      "PC": mips (json-int)
2183 - "thread_id": ID of the underlying host thread (json-int)
2184
2185 Example:
2186
2187 -> { "execute": "query-cpus" }
2188 <- {
2189       "return":[
2190          {
2191             "CPU":0,
2192             "current":true,
2193             "halted":false,
2194             "pc":3227107138
2195             "thread_id":3134
2196          },
2197          {
2198             "CPU":1,
2199             "current":false,
2200             "halted":true,
2201             "pc":7108165
2202             "thread_id":3135
2203          }
2204       ]
2205    }
2206
2207 EQMP
2208
2209     {
2210         .name       = "query-cpus",
2211         .args_type  = "",
2212         .mhandler.cmd_new = qmp_marshal_input_query_cpus,
2213     },
2214
2215 SQMP
2216 query-pci
2217 ---------
2218
2219 PCI buses and devices information.
2220
2221 The returned value is a json-array of all buses. Each bus is represented by
2222 a json-object, which has a key with a json-array of all PCI devices attached
2223 to it. Each device is represented by a json-object.
2224
2225 The bus json-object contains the following:
2226
2227 - "bus": bus number (json-int)
2228 - "devices": a json-array of json-objects, each json-object represents a
2229              PCI device
2230
2231 The PCI device json-object contains the following:
2232
2233 - "bus": identical to the parent's bus number (json-int)
2234 - "slot": slot number (json-int)
2235 - "function": function number (json-int)
2236 - "class_info": a json-object containing:
2237      - "desc": device class description (json-string, optional)
2238      - "class": device class number (json-int)
2239 - "id": a json-object containing:
2240      - "device": device ID (json-int)
2241      - "vendor": vendor ID (json-int)
2242 - "irq": device's IRQ if assigned (json-int, optional)
2243 - "qdev_id": qdev id string (json-string)
2244 - "pci_bridge": It's a json-object, only present if this device is a
2245                 PCI bridge, contains:
2246      - "bus": bus number (json-int)
2247      - "secondary": secondary bus number (json-int)
2248      - "subordinate": subordinate bus number (json-int)
2249      - "io_range": I/O memory range information, a json-object with the
2250                    following members:
2251                  - "base": base address, in bytes (json-int)
2252                  - "limit": limit address, in bytes (json-int)
2253      - "memory_range": memory range information, a json-object with the
2254                        following members:
2255                  - "base": base address, in bytes (json-int)
2256                  - "limit": limit address, in bytes (json-int)
2257      - "prefetchable_range": Prefetchable memory range information, a
2258                              json-object with the following members:
2259                  - "base": base address, in bytes (json-int)
2260                  - "limit": limit address, in bytes (json-int)
2261      - "devices": a json-array of PCI devices if there's any attached, each
2262                   each element is represented by a json-object, which contains
2263                   the same members of the 'PCI device json-object' described
2264                   above (optional)
2265 - "regions": a json-array of json-objects, each json-object represents a
2266              memory region of this device
2267
2268 The memory range json-object contains the following:
2269
2270 - "base": base memory address (json-int)
2271 - "limit": limit value (json-int)
2272
2273 The region json-object can be an I/O region or a memory region, an I/O region
2274 json-object contains the following:
2275
2276 - "type": "io" (json-string, fixed)
2277 - "bar": BAR number (json-int)
2278 - "address": memory address (json-int)
2279 - "size": memory size (json-int)
2280
2281 A memory region json-object contains the following:
2282
2283 - "type": "memory" (json-string, fixed)
2284 - "bar": BAR number (json-int)
2285 - "address": memory address (json-int)
2286 - "size": memory size (json-int)
2287 - "mem_type_64": true or false (json-bool)
2288 - "prefetch": true or false (json-bool)
2289
2290 Example:
2291
2292 -> { "execute": "query-pci" }
2293 <- {
2294       "return":[
2295          {
2296             "bus":0,
2297             "devices":[
2298                {
2299                   "bus":0,
2300                   "qdev_id":"",
2301                   "slot":0,
2302                   "class_info":{
2303                      "class":1536,
2304                      "desc":"Host bridge"
2305                   },
2306                   "id":{
2307                      "device":32902,
2308                      "vendor":4663
2309                   },
2310                   "function":0,
2311                   "regions":[
2312
2313                   ]
2314                },
2315                {
2316                   "bus":0,
2317                   "qdev_id":"",
2318                   "slot":1,
2319                   "class_info":{
2320                      "class":1537,
2321                      "desc":"ISA bridge"
2322                   },
2323                   "id":{
2324                      "device":32902,
2325                      "vendor":28672
2326                   },
2327                   "function":0,
2328                   "regions":[
2329
2330                   ]
2331                },
2332                {
2333                   "bus":0,
2334                   "qdev_id":"",
2335                   "slot":1,
2336                   "class_info":{
2337                      "class":257,
2338                      "desc":"IDE controller"
2339                   },
2340                   "id":{
2341                      "device":32902,
2342                      "vendor":28688
2343                   },
2344                   "function":1,
2345                   "regions":[
2346                      {
2347                         "bar":4,
2348                         "size":16,
2349                         "address":49152,
2350                         "type":"io"
2351                      }
2352                   ]
2353                },
2354                {
2355                   "bus":0,
2356                   "qdev_id":"",
2357                   "slot":2,
2358                   "class_info":{
2359                      "class":768,
2360                      "desc":"VGA controller"
2361                   },
2362                   "id":{
2363                      "device":4115,
2364                      "vendor":184
2365                   },
2366                   "function":0,
2367                   "regions":[
2368                      {
2369                         "prefetch":true,
2370                         "mem_type_64":false,
2371                         "bar":0,
2372                         "size":33554432,
2373                         "address":4026531840,
2374                         "type":"memory"
2375                      },
2376                      {
2377                         "prefetch":false,
2378                         "mem_type_64":false,
2379                         "bar":1,
2380                         "size":4096,
2381                         "address":4060086272,
2382                         "type":"memory"
2383                      },
2384                      {
2385                         "prefetch":false,
2386                         "mem_type_64":false,
2387                         "bar":6,
2388                         "size":65536,
2389                         "address":-1,
2390                         "type":"memory"
2391                      }
2392                   ]
2393                },
2394                {
2395                   "bus":0,
2396                   "qdev_id":"",
2397                   "irq":11,
2398                   "slot":4,
2399                   "class_info":{
2400                      "class":1280,
2401                      "desc":"RAM controller"
2402                   },
2403                   "id":{
2404                      "device":6900,
2405                      "vendor":4098
2406                   },
2407                   "function":0,
2408                   "regions":[
2409                      {
2410                         "bar":0,
2411                         "size":32,
2412                         "address":49280,
2413                         "type":"io"
2414                      }
2415                   ]
2416                }
2417             ]
2418          }
2419       ]
2420    }
2421
2422 Note: This example has been shortened as the real response is too long.
2423
2424 EQMP
2425
2426     {
2427         .name       = "query-pci",
2428         .args_type  = "",
2429         .mhandler.cmd_new = qmp_marshal_input_query_pci,
2430     },
2431
2432 SQMP
2433 query-kvm
2434 ---------
2435
2436 Show KVM information.
2437
2438 Return a json-object with the following information:
2439
2440 - "enabled": true if KVM support is enabled, false otherwise (json-bool)
2441 - "present": true if QEMU has KVM support, false otherwise (json-bool)
2442
2443 Example:
2444
2445 -> { "execute": "query-kvm" }
2446 <- { "return": { "enabled": true, "present": true } }
2447
2448 EQMP
2449
2450     {
2451         .name       = "query-kvm",
2452         .args_type  = "",
2453         .mhandler.cmd_new = qmp_marshal_input_query_kvm,
2454     },
2455
2456 SQMP
2457 query-status
2458 ------------
2459
2460 Return a json-object with the following information:
2461
2462 - "running": true if the VM is running, or false if it is paused (json-bool)
2463 - "singlestep": true if the VM is in single step mode,
2464                 false otherwise (json-bool)
2465 - "status": one of the following values (json-string)
2466     "debug" - QEMU is running on a debugger
2467     "inmigrate" - guest is paused waiting for an incoming migration
2468     "internal-error" - An internal error that prevents further guest
2469     execution has occurred
2470     "io-error" - the last IOP has failed and the device is configured
2471     to pause on I/O errors
2472     "paused" - guest has been paused via the 'stop' command
2473     "postmigrate" - guest is paused following a successful 'migrate'
2474     "prelaunch" - QEMU was started with -S and guest has not started
2475     "finish-migrate" - guest is paused to finish the migration process
2476     "restore-vm" - guest is paused to restore VM state
2477     "running" - guest is actively running
2478     "save-vm" - guest is paused to save the VM state
2479     "shutdown" - guest is shut down (and -no-shutdown is in use)
2480     "watchdog" - the watchdog action is configured to pause and
2481      has been triggered
2482
2483 Example:
2484
2485 -> { "execute": "query-status" }
2486 <- { "return": { "running": true, "singlestep": false, "status": "running" } }
2487
2488 EQMP
2489
2490     {
2491         .name       = "query-status",
2492         .args_type  = "",
2493         .mhandler.cmd_new = qmp_marshal_input_query_status,
2494     },
2495
2496 SQMP
2497 query-mice
2498 ----------
2499
2500 Show VM mice information.
2501
2502 Each mouse is represented by a json-object, the returned value is a json-array
2503 of all mice.
2504
2505 The mouse json-object contains the following:
2506
2507 - "name": mouse's name (json-string)
2508 - "index": mouse's index (json-int)
2509 - "current": true if this mouse is receiving events, false otherwise (json-bool)
2510 - "absolute": true if the mouse generates absolute input events (json-bool)
2511
2512 Example:
2513
2514 -> { "execute": "query-mice" }
2515 <- {
2516       "return":[
2517          {
2518             "name":"QEMU Microsoft Mouse",
2519             "index":0,
2520             "current":false,
2521             "absolute":false
2522          },
2523          {
2524             "name":"QEMU PS/2 Mouse",
2525             "index":1,
2526             "current":true,
2527             "absolute":true
2528          }
2529       ]
2530    }
2531
2532 EQMP
2533
2534     {
2535         .name       = "query-mice",
2536         .args_type  = "",
2537         .mhandler.cmd_new = qmp_marshal_input_query_mice,
2538     },
2539
2540 SQMP
2541 query-vnc
2542 ---------
2543
2544 Show VNC server information.
2545
2546 Return a json-object with server information. Connected clients are returned
2547 as a json-array of json-objects.
2548
2549 The main json-object contains the following:
2550
2551 - "enabled": true or false (json-bool)
2552 - "host": server's IP address (json-string)
2553 - "family": address family (json-string)
2554          - Possible values: "ipv4", "ipv6", "unix", "unknown"
2555 - "service": server's port number (json-string)
2556 - "auth": authentication method (json-string)
2557          - Possible values: "invalid", "none", "ra2", "ra2ne", "sasl", "tight",
2558                             "tls", "ultra", "unknown", "vencrypt", "vencrypt",
2559                             "vencrypt+plain", "vencrypt+tls+none",
2560                             "vencrypt+tls+plain", "vencrypt+tls+sasl",
2561                             "vencrypt+tls+vnc", "vencrypt+x509+none",
2562                             "vencrypt+x509+plain", "vencrypt+x509+sasl",
2563                             "vencrypt+x509+vnc", "vnc"
2564 - "clients": a json-array of all connected clients
2565
2566 Clients are described by a json-object, each one contain the following:
2567
2568 - "host": client's IP address (json-string)
2569 - "family": address family (json-string)
2570          - Possible values: "ipv4", "ipv6", "unix", "unknown"
2571 - "service": client's port number (json-string)
2572 - "x509_dname": TLS dname (json-string, optional)
2573 - "sasl_username": SASL username (json-string, optional)
2574
2575 Example:
2576
2577 -> { "execute": "query-vnc" }
2578 <- {
2579       "return":{
2580          "enabled":true,
2581          "host":"0.0.0.0",
2582          "service":"50402",
2583          "auth":"vnc",
2584          "family":"ipv4",
2585          "clients":[
2586             {
2587                "host":"127.0.0.1",
2588                "service":"50401",
2589                "family":"ipv4"
2590             }
2591          ]
2592       }
2593    }
2594
2595 EQMP
2596
2597     {
2598         .name       = "query-vnc",
2599         .args_type  = "",
2600         .mhandler.cmd_new = qmp_marshal_input_query_vnc,
2601     },
2602
2603 SQMP
2604 query-spice
2605 -----------
2606
2607 Show SPICE server information.
2608
2609 Return a json-object with server information. Connected clients are returned
2610 as a json-array of json-objects.
2611
2612 The main json-object contains the following:
2613
2614 - "enabled": true or false (json-bool)
2615 - "host": server's IP address (json-string)
2616 - "port": server's port number (json-int, optional)
2617 - "tls-port": server's port number (json-int, optional)
2618 - "auth": authentication method (json-string)
2619          - Possible values: "none", "spice"
2620 - "channels": a json-array of all active channels clients
2621
2622 Channels are described by a json-object, each one contain the following:
2623
2624 - "host": client's IP address (json-string)
2625 - "family": address family (json-string)
2626          - Possible values: "ipv4", "ipv6", "unix", "unknown"
2627 - "port": client's port number (json-string)
2628 - "connection-id": spice connection id.  All channels with the same id
2629                    belong to the same spice session (json-int)
2630 - "channel-type": channel type.  "1" is the main control channel, filter for
2631                   this one if you want track spice sessions only (json-int)
2632 - "channel-id": channel id.  Usually "0", might be different needed when
2633                 multiple channels of the same type exist, such as multiple
2634                 display channels in a multihead setup (json-int)
2635 - "tls": whevener the channel is encrypted (json-bool)
2636
2637 Example:
2638
2639 -> { "execute": "query-spice" }
2640 <- {
2641       "return": {
2642          "enabled": true,
2643          "auth": "spice",
2644          "port": 5920,
2645          "tls-port": 5921,
2646          "host": "0.0.0.0",
2647          "channels": [
2648             {
2649                "port": "54924",
2650                "family": "ipv4",
2651                "channel-type": 1,
2652                "connection-id": 1804289383,
2653                "host": "127.0.0.1",
2654                "channel-id": 0,
2655                "tls": true
2656             },
2657             {
2658                "port": "36710",
2659                "family": "ipv4",
2660                "channel-type": 4,
2661                "connection-id": 1804289383,
2662                "host": "127.0.0.1",
2663                "channel-id": 0,
2664                "tls": false
2665             },
2666             [ ... more channels follow ... ]
2667          ]
2668       }
2669    }
2670
2671 EQMP
2672
2673 #if defined(CONFIG_SPICE)
2674     {
2675         .name       = "query-spice",
2676         .args_type  = "",
2677         .mhandler.cmd_new = qmp_marshal_input_query_spice,
2678     },
2679 #endif
2680
2681 SQMP
2682 query-name
2683 ----------
2684
2685 Show VM name.
2686
2687 Return a json-object with the following information:
2688
2689 - "name": VM's name (json-string, optional)
2690
2691 Example:
2692
2693 -> { "execute": "query-name" }
2694 <- { "return": { "name": "qemu-name" } }
2695
2696 EQMP
2697
2698     {
2699         .name       = "query-name",
2700         .args_type  = "",
2701         .mhandler.cmd_new = qmp_marshal_input_query_name,
2702     },
2703
2704 SQMP
2705 query-uuid
2706 ----------
2707
2708 Show VM UUID.
2709
2710 Return a json-object with the following information:
2711
2712 - "UUID": Universally Unique Identifier (json-string)
2713
2714 Example:
2715
2716 -> { "execute": "query-uuid" }
2717 <- { "return": { "UUID": "550e8400-e29b-41d4-a716-446655440000" } }
2718
2719 EQMP
2720
2721     {
2722         .name       = "query-uuid",
2723         .args_type  = "",
2724         .mhandler.cmd_new = qmp_marshal_input_query_uuid,
2725     },
2726
2727 SQMP
2728 query-command-line-options
2729 --------------------------
2730
2731 Show command line option schema.
2732
2733 Return a json-array of command line option schema for all options (or for
2734 the given option), returning an error if the given option doesn't exist.
2735
2736 Each array entry contains the following:
2737
2738 - "option": option name (json-string)
2739 - "parameters": a json-array describes all parameters of the option:
2740     - "name": parameter name (json-string)
2741     - "type": parameter type (one of 'string', 'boolean', 'number',
2742               or 'size')
2743     - "help": human readable description of the parameter
2744               (json-string, optional)
2745
2746 Example:
2747
2748 -> { "execute": "query-command-line-options", "arguments": { "option": "option-rom" } }
2749 <- { "return": [
2750         {
2751             "parameters": [
2752                 {
2753                     "name": "romfile",
2754                     "type": "string"
2755                 },
2756                 {
2757                     "name": "bootindex",
2758                     "type": "number"
2759                 }
2760             ],
2761             "option": "option-rom"
2762         }
2763      ]
2764    }
2765
2766 EQMP
2767
2768     {
2769         .name       = "query-command-line-options",
2770         .args_type  = "option:s?",
2771         .mhandler.cmd_new = qmp_marshal_input_query_command_line_options,
2772     },
2773
2774 SQMP
2775 query-migrate
2776 -------------
2777
2778 Migration status.
2779
2780 Return a json-object. If migration is active there will be another json-object
2781 with RAM migration status and if block migration is active another one with
2782 block migration status.
2783
2784 The main json-object contains the following:
2785
2786 - "status": migration status (json-string)
2787      - Possible values: "active", "completed", "failed", "cancelled"
2788 - "total-time": total amount of ms since migration started.  If
2789                 migration has ended, it returns the total migration
2790                 time (json-int)
2791 - "setup-time" amount of setup time in milliseconds _before_ the
2792                iterations begin but _after_ the QMP command is issued.
2793                This is designed to provide an accounting of any activities
2794                (such as RDMA pinning) which may be expensive, but do not
2795                actually occur during the iterative migration rounds
2796                themselves. (json-int)
2797 - "downtime": only present when migration has finished correctly
2798               total amount in ms for downtime that happened (json-int)
2799 - "expected-downtime": only present while migration is active
2800                 total amount in ms for downtime that was calculated on
2801                 the last bitmap round (json-int)
2802 - "ram": only present if "status" is "active", it is a json-object with the
2803   following RAM information:
2804          - "transferred": amount transferred in bytes (json-int)
2805          - "remaining": amount remaining to transfer in bytes (json-int)
2806          - "total": total amount of memory in bytes (json-int)
2807          - "duplicate": number of pages filled entirely with the same
2808             byte (json-int)
2809             These are sent over the wire much more efficiently.
2810          - "skipped": number of skipped zero pages (json-int)
2811          - "normal" : number of whole pages transferred.  I.e. they
2812             were not sent as duplicate or xbzrle pages (json-int)
2813          - "normal-bytes" : number of bytes transferred in whole
2814             pages. This is just normal pages times size of one page,
2815             but this way upper levels don't need to care about page
2816             size (json-int)
2817 - "disk": only present if "status" is "active" and it is a block migration,
2818   it is a json-object with the following disk information:
2819          - "transferred": amount transferred in bytes (json-int)
2820          - "remaining": amount remaining to transfer in bytes json-int)
2821          - "total": total disk size in bytes (json-int)
2822 - "xbzrle-cache": only present if XBZRLE is active.
2823   It is a json-object with the following XBZRLE information:
2824          - "cache-size": XBZRLE cache size in bytes
2825          - "bytes": number of bytes transferred for XBZRLE compressed pages
2826          - "pages": number of XBZRLE compressed pages
2827          - "cache-miss": number of XBRZRLE page cache misses
2828          - "overflow": number of times XBZRLE overflows.  This means
2829            that the XBZRLE encoding was bigger than just sent the
2830            whole page, and then we sent the whole page instead (as as
2831            normal page).
2832
2833 Examples:
2834
2835 1. Before the first migration
2836
2837 -> { "execute": "query-migrate" }
2838 <- { "return": {} }
2839
2840 2. Migration is done and has succeeded
2841
2842 -> { "execute": "query-migrate" }
2843 <- { "return": {
2844         "status": "completed",
2845         "ram":{
2846           "transferred":123,
2847           "remaining":123,
2848           "total":246,
2849           "total-time":12345,
2850           "setup-time":12345,
2851           "downtime":12345,
2852           "duplicate":123,
2853           "normal":123,
2854           "normal-bytes":123456
2855         }
2856      }
2857    }
2858
2859 3. Migration is done and has failed
2860
2861 -> { "execute": "query-migrate" }
2862 <- { "return": { "status": "failed" } }
2863
2864 4. Migration is being performed and is not a block migration:
2865
2866 -> { "execute": "query-migrate" }
2867 <- {
2868       "return":{
2869          "status":"active",
2870          "ram":{
2871             "transferred":123,
2872             "remaining":123,
2873             "total":246,
2874             "total-time":12345,
2875             "setup-time":12345,
2876             "expected-downtime":12345,
2877             "duplicate":123,
2878             "normal":123,
2879             "normal-bytes":123456
2880          }
2881       }
2882    }
2883
2884 5. Migration is being performed and is a block migration:
2885
2886 -> { "execute": "query-migrate" }
2887 <- {
2888       "return":{
2889          "status":"active",
2890          "ram":{
2891             "total":1057024,
2892             "remaining":1053304,
2893             "transferred":3720,
2894             "total-time":12345,
2895             "setup-time":12345,
2896             "expected-downtime":12345,
2897             "duplicate":123,
2898             "normal":123,
2899             "normal-bytes":123456
2900          },
2901          "disk":{
2902             "total":20971520,
2903             "remaining":20880384,
2904             "transferred":91136
2905          }
2906       }
2907    }
2908
2909 6. Migration is being performed and XBZRLE is active:
2910
2911 -> { "execute": "query-migrate" }
2912 <- {
2913       "return":{
2914          "status":"active",
2915          "capabilities" : [ { "capability": "xbzrle", "state" : true } ],
2916          "ram":{
2917             "total":1057024,
2918             "remaining":1053304,
2919             "transferred":3720,
2920             "total-time":12345,
2921             "setup-time":12345,
2922             "expected-downtime":12345,
2923             "duplicate":10,
2924             "normal":3333,
2925             "normal-bytes":3412992
2926          },
2927          "xbzrle-cache":{
2928             "cache-size":67108864,
2929             "bytes":20971520,
2930             "pages":2444343,
2931             "cache-miss":2244,
2932             "overflow":34434
2933          }
2934       }
2935    }
2936
2937 EQMP
2938
2939     {
2940         .name       = "query-migrate",
2941         .args_type  = "",
2942         .mhandler.cmd_new = qmp_marshal_input_query_migrate,
2943     },
2944
2945 SQMP
2946 migrate-set-capabilities
2947 ------------------------
2948
2949 Enable/Disable migration capabilities
2950
2951 - "xbzrle": XBZRLE support
2952
2953 Arguments:
2954
2955 Example:
2956
2957 -> { "execute": "migrate-set-capabilities" , "arguments":
2958      { "capabilities": [ { "capability": "xbzrle", "state": true } ] } }
2959
2960 EQMP
2961
2962     {
2963         .name       = "migrate-set-capabilities",
2964         .args_type  = "capabilities:O",
2965         .params     = "capability:s,state:b",
2966         .mhandler.cmd_new = qmp_marshal_input_migrate_set_capabilities,
2967     },
2968 SQMP
2969 query-migrate-capabilities
2970 --------------------------
2971
2972 Query current migration capabilities
2973
2974 - "capabilities": migration capabilities state
2975          - "xbzrle" : XBZRLE state (json-bool)
2976
2977 Arguments:
2978
2979 Example:
2980
2981 -> { "execute": "query-migrate-capabilities" }
2982 <- { "return": [ { "state": false, "capability": "xbzrle" } ] }
2983
2984 EQMP
2985
2986     {
2987         .name       = "query-migrate-capabilities",
2988         .args_type  = "",
2989         .mhandler.cmd_new = qmp_marshal_input_query_migrate_capabilities,
2990     },
2991
2992 SQMP
2993 query-balloon
2994 -------------
2995
2996 Show balloon information.
2997
2998 Make an asynchronous request for balloon info. When the request completes a
2999 json-object will be returned containing the following data:
3000
3001 - "actual": current balloon value in bytes (json-int)
3002
3003 Example:
3004
3005 -> { "execute": "query-balloon" }
3006 <- {
3007       "return":{
3008          "actual":1073741824,
3009       }
3010    }
3011
3012 EQMP
3013
3014     {
3015         .name       = "query-balloon",
3016         .args_type  = "",
3017         .mhandler.cmd_new = qmp_marshal_input_query_balloon,
3018     },
3019
3020     {
3021         .name       = "query-block-jobs",
3022         .args_type  = "",
3023         .mhandler.cmd_new = qmp_marshal_input_query_block_jobs,
3024     },
3025
3026     {
3027         .name       = "qom-list",
3028         .args_type  = "path:s",
3029         .mhandler.cmd_new = qmp_marshal_input_qom_list,
3030     },
3031
3032     {
3033         .name       = "qom-set",
3034         .args_type  = "path:s,property:s,value:q",
3035         .mhandler.cmd_new = qmp_qom_set,
3036     },
3037
3038     {
3039         .name       = "qom-get",
3040         .args_type  = "path:s,property:s",
3041         .mhandler.cmd_new = qmp_qom_get,
3042     },
3043
3044     {
3045         .name       = "nbd-server-start",
3046         .args_type  = "addr:q",
3047         .mhandler.cmd_new = qmp_marshal_input_nbd_server_start,
3048     },
3049     {
3050         .name       = "nbd-server-add",
3051         .args_type  = "device:B,writable:b?",
3052         .mhandler.cmd_new = qmp_marshal_input_nbd_server_add,
3053     },
3054     {
3055         .name       = "nbd-server-stop",
3056         .args_type  = "",
3057         .mhandler.cmd_new = qmp_marshal_input_nbd_server_stop,
3058     },
3059
3060     {
3061         .name       = "change-vnc-password",
3062         .args_type  = "password:s",
3063         .mhandler.cmd_new = qmp_marshal_input_change_vnc_password,
3064     },
3065     {
3066         .name       = "qom-list-types",
3067         .args_type  = "implements:s?,abstract:b?",
3068         .mhandler.cmd_new = qmp_marshal_input_qom_list_types,
3069     },
3070
3071     {
3072         .name       = "device-list-properties",
3073         .args_type  = "typename:s",
3074         .mhandler.cmd_new = qmp_marshal_input_device_list_properties,
3075     },
3076
3077     {
3078         .name       = "query-machines",
3079         .args_type  = "",
3080         .mhandler.cmd_new = qmp_marshal_input_query_machines,
3081     },
3082
3083     {
3084         .name       = "query-cpu-definitions",
3085         .args_type  = "",
3086         .mhandler.cmd_new = qmp_marshal_input_query_cpu_definitions,
3087     },
3088
3089     {
3090         .name       = "query-target",
3091         .args_type  = "",
3092         .mhandler.cmd_new = qmp_marshal_input_query_target,
3093     },
3094
3095     {
3096         .name       = "query-tpm",
3097         .args_type  = "",
3098         .mhandler.cmd_new = qmp_marshal_input_query_tpm,
3099     },
3100
3101 SQMP
3102 query-tpm
3103 ---------
3104
3105 Return information about the TPM device.
3106
3107 Arguments: None
3108
3109 Example:
3110
3111 -> { "execute": "query-tpm" }
3112 <- { "return":
3113      [
3114        { "model": "tpm-tis",
3115          "options":
3116            { "type": "passthrough",
3117              "data":
3118                { "cancel-path": "/sys/class/misc/tpm0/device/cancel",
3119                  "path": "/dev/tpm0"
3120                }
3121            },
3122          "id": "tpm0"
3123        }
3124      ]
3125    }
3126
3127 EQMP
3128
3129     {
3130         .name       = "query-tpm-models",
3131         .args_type  = "",
3132         .mhandler.cmd_new = qmp_marshal_input_query_tpm_models,
3133     },
3134
3135 SQMP
3136 query-tpm-models
3137 ----------------
3138
3139 Return a list of supported TPM models.
3140
3141 Arguments: None
3142
3143 Example:
3144
3145 -> { "execute": "query-tpm-models" }
3146 <- { "return": [ "tpm-tis" ] }
3147
3148 EQMP
3149
3150     {
3151         .name       = "query-tpm-types",
3152         .args_type  = "",
3153         .mhandler.cmd_new = qmp_marshal_input_query_tpm_types,
3154     },
3155
3156 SQMP
3157 query-tpm-types
3158 ---------------
3159
3160 Return a list of supported TPM types.
3161
3162 Arguments: None
3163
3164 Example:
3165
3166 -> { "execute": "query-tpm-types" }
3167 <- { "return": [ "passthrough" ] }
3168
3169 EQMP
3170
3171     {
3172         .name       = "chardev-add",
3173         .args_type  = "id:s,backend:q",
3174         .mhandler.cmd_new = qmp_marshal_input_chardev_add,
3175     },
3176
3177 SQMP
3178 chardev-add
3179 ----------------
3180
3181 Add a chardev.
3182
3183 Arguments:
3184
3185 - "id": the chardev's ID, must be unique (json-string)
3186 - "backend": chardev backend type + parameters
3187
3188 Examples:
3189
3190 -> { "execute" : "chardev-add",
3191      "arguments" : { "id" : "foo",
3192                      "backend" : { "type" : "null", "data" : {} } } }
3193 <- { "return": {} }
3194
3195 -> { "execute" : "chardev-add",
3196      "arguments" : { "id" : "bar",
3197                      "backend" : { "type" : "file",
3198                                    "data" : { "out" : "/tmp/bar.log" } } } }
3199 <- { "return": {} }
3200
3201 -> { "execute" : "chardev-add",
3202      "arguments" : { "id" : "baz",
3203                      "backend" : { "type" : "pty", "data" : {} } } }
3204 <- { "return": { "pty" : "/dev/pty/42" } }
3205
3206 EQMP
3207
3208     {
3209         .name       = "chardev-remove",
3210         .args_type  = "id:s",
3211         .mhandler.cmd_new = qmp_marshal_input_chardev_remove,
3212     },
3213
3214
3215 SQMP
3216 chardev-remove
3217 --------------
3218
3219 Remove a chardev.
3220
3221 Arguments:
3222
3223 - "id": the chardev's ID, must exist and not be in use (json-string)
3224
3225 Example:
3226
3227 -> { "execute": "chardev-remove", "arguments": { "id" : "foo" } }
3228 <- { "return": {} }
3229
3230 EQMP
3231     {
3232         .name       = "query-rx-filter",
3233         .args_type  = "name:s?",
3234         .mhandler.cmd_new = qmp_marshal_input_query_rx_filter,
3235     },
3236
3237 SQMP
3238 query-rx-filter
3239 ---------------
3240
3241 Show rx-filter information.
3242
3243 Returns a json-array of rx-filter information for all NICs (or for the
3244 given NIC), returning an error if the given NIC doesn't exist, or
3245 given NIC doesn't support rx-filter querying, or given net client
3246 isn't a NIC.
3247
3248 The query will clear the event notification flag of each NIC, then qemu
3249 will start to emit event to QMP monitor.
3250
3251 Each array entry contains the following:
3252
3253 - "name": net client name (json-string)
3254 - "promiscuous": promiscuous mode is enabled (json-bool)
3255 - "multicast": multicast receive state (one of 'normal', 'none', 'all')
3256 - "unicast": unicast receive state  (one of 'normal', 'none', 'all')
3257 - "broadcast-allowed": allow to receive broadcast (json-bool)
3258 - "multicast-overflow": multicast table is overflowed (json-bool)
3259 - "unicast-overflow": unicast table is overflowed (json-bool)
3260 - "main-mac": main macaddr string (json-string)
3261 - "vlan-table": a json-array of active vlan id
3262 - "unicast-table": a json-array of unicast macaddr string
3263 - "multicast-table": a json-array of multicast macaddr string
3264
3265 Example:
3266
3267 -> { "execute": "query-rx-filter", "arguments": { "name": "vnet0" } }
3268 <- { "return": [
3269         {
3270             "promiscuous": true,
3271             "name": "vnet0",
3272             "main-mac": "52:54:00:12:34:56",
3273             "unicast": "normal",
3274             "vlan-table": [
3275                 4,
3276                 0
3277             ],
3278             "unicast-table": [
3279             ],
3280             "multicast": "normal",
3281             "multicast-overflow": false,
3282             "unicast-overflow": false,
3283             "multicast-table": [
3284                 "01:00:5e:00:00:01",
3285                 "33:33:00:00:00:01",
3286                 "33:33:ff:12:34:56"
3287             ],
3288             "broadcast-allowed": false
3289         }
3290       ]
3291    }
3292
3293 EQMP
3294
3295     {
3296         .name       = "blockdev-add",
3297         .args_type  = "options:q",
3298         .mhandler.cmd_new = qmp_marshal_input_blockdev_add,
3299     },
3300
3301 SQMP
3302 blockdev-add
3303 ------------
3304
3305 Add a block device.
3306
3307 Arguments:
3308
3309 - "options": block driver options
3310
3311 Example (1):
3312
3313 -> { "execute": "blockdev-add",
3314     "arguments": { "options" : { "driver": "qcow2",
3315                                  "file": { "driver": "file",
3316                                            "filename": "test.qcow2" } } } }
3317 <- { "return": {} }
3318
3319 Example (2):
3320
3321 -> { "execute": "blockdev-add",
3322      "arguments": {
3323          "options": {
3324            "driver": "qcow2",
3325            "id": "my_disk",
3326            "discard": "unmap",
3327            "cache": {
3328                "direct": true,
3329                "writeback": true
3330            },
3331            "file": {
3332                "driver": "file",
3333                "filename": "/tmp/test.qcow2"
3334            },
3335            "backing": {
3336                "driver": "raw",
3337                "file": {
3338                    "driver": "file",
3339                    "filename": "/dev/fdset/4"
3340                }
3341            }
3342          }
3343        }
3344      }
3345
3346 <- { "return": {} }
3347
3348 EQMP