qmp-commands.hx

   1 HXCOMM QMP dispatch table and documentation
   2 HXCOMM Text between SQMP and EQMP is copied to the QMP documentation 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         .mhandler.cmd_new = do_device_add,
 280     },
 281
 282 SQMP
 283 device_add
 284 ----------
 285
 286 Add a device.
 287
 288 Arguments:
 289
 290 - "driver": the name of the new device's driver (json-string)
 291 - "bus": the device's parent bus (device tree path, json-string, optional)
 292 - "id": the device's ID, must be unique (json-string)
 293 - device properties
 294
 295 Example:
 296
 297 -> { "execute": "device_add", "arguments": { "driver": "e1000", "id": "net1" } }
 298 <- { "return": {} }
 299
 300 Notes:
 301
 302 (1) For detailed information about this command, please refer to the
 303     'docs/qdev-device-use.txt' file.
 304
 305 (2) It's possible to list device properties by running QEMU with the
 306     "-device DEVICE,\?" command-line argument, where DEVICE is the device's name
 307
 308 EQMP
 309
 310     {
 311         .name       = "device_del",
 312         .args_type  = "id:s",
 313         .mhandler.cmd_new = qmp_marshal_input_device_del,
 314     },
 315
 316 SQMP
 317 device_del
 318 ----------
 319
 320 Remove a device.
 321
 322 Arguments:
 323
 324 - "id": the device's ID (json-string)
 325
 326 Example:
 327
 328 -> { "execute": "device_del", "arguments": { "id": "net1" } }
 329 <- { "return": {} }
 330
 331 EQMP
 332
 333     {
 334         .name       = "send-key",
 335         .args_type  = "keys:q,hold-time:i?",
 336         .mhandler.cmd_new = qmp_marshal_input_send_key,
 337     },
 338
 339 SQMP
 340 send-key
 341 ----------
 342
 343 Send keys to VM.
 344
 345 Arguments:
 346
 347 keys array:
 348     - "key": key sequence (a json-array of key union values,
 349              union can be number or qcode enum)
 350
 351 - hold-time: time to delay key up events, milliseconds. Defaults to 100
 352              (json-int, optional)
 353
 354 Example:
 355
 356 -> { "execute": "send-key",
 357      "arguments": { "keys": [ { "type": "qcode", "data": "ctrl" },
 358                               { "type": "qcode", "data": "alt" },
 359                               { "type": "qcode", "data": "delete" } ] } }
 360 <- { "return": {} }
 361
 362 EQMP
 363
 364     {
 365         .name       = "cpu",
 366         .args_type  = "index:i",
 367         .mhandler.cmd_new = qmp_marshal_input_cpu,
 368     },
 369
 370 SQMP
 371 cpu
 372 ---
 373
 374 Set the default CPU.
 375
 376 Arguments:
 377
 378 - "index": the CPU's index (json-int)
 379
 380 Example:
 381
 382 -> { "execute": "cpu", "arguments": { "index": 0 } }
 383 <- { "return": {} }
 384
 385 Note: CPUs' indexes are obtained with the 'query-cpus' command.
 386
 387 EQMP
 388
 389     {
 390         .name       = "cpu-add",
 391         .args_type  = "id:i",
 392         .mhandler.cmd_new = qmp_marshal_input_cpu_add,
 393     },
 394
 395 SQMP
 396 cpu-add
 397 -------
 398
 399 Adds virtual cpu
 400
 401 Arguments:
 402
 403 - "id": cpu id (json-int)
 404
 405 Example:
 406
 407 -> { "execute": "cpu-add", "arguments": { "id": 2 } }
 408 <- { "return": {} }
 409
 410 EQMP
 411
 412     {
 413         .name       = "memsave",
 414         .args_type  = "val:l,size:i,filename:s,cpu:i?",
 415         .mhandler.cmd_new = qmp_marshal_input_memsave,
 416     },
 417
 418 SQMP
 419 memsave
 420 -------
 421
 422 Save to disk virtual memory dump starting at 'val' of size 'size'.
 423
 424 Arguments:
 425
 426 - "val": the starting address (json-int)
 427 - "size": the memory size, in bytes (json-int)
 428 - "filename": file path (json-string)
 429 - "cpu": virtual CPU index (json-int, optional)
 430
 431 Example:
 432
 433 -> { "execute": "memsave",
 434              "arguments": { "val": 10,
 435                             "size": 100,
 436                             "filename": "/tmp/virtual-mem-dump" } }
 437 <- { "return": {} }
 438
 439 EQMP
 440
 441     {
 442         .name       = "pmemsave",
 443         .args_type  = "val:l,size:i,filename:s",
 444         .mhandler.cmd_new = qmp_marshal_input_pmemsave,
 445     },
 446
 447 SQMP
 448 pmemsave
 449 --------
 450
 451 Save to disk physical memory dump starting at 'val' of size 'size'.
 452
 453 Arguments:
 454
 455 - "val": the starting address (json-int)
 456 - "size": the memory size, in bytes (json-int)
 457 - "filename": file path (json-string)
 458
 459 Example:
 460
 461 -> { "execute": "pmemsave",
 462              "arguments": { "val": 10,
 463                             "size": 100,
 464                             "filename": "/tmp/physical-mem-dump" } }
 465 <- { "return": {} }
 466
 467 EQMP
 468
 469     {
 470         .name       = "inject-nmi",
 471         .args_type  = "",
 472         .mhandler.cmd_new = qmp_marshal_input_inject_nmi,
 473     },
 474
 475 SQMP
 476 inject-nmi
 477 ----------
 478
 479 Inject an NMI on the default CPU (x86/s390) or all CPUs (ppc64).
 480
 481 Arguments: None.
 482
 483 Example:
 484
 485 -> { "execute": "inject-nmi" }
 486 <- { "return": {} }
 487
 488 Note: inject-nmi fails when the guest doesn't support injecting.
 489
 490 EQMP
 491
 492     {
 493         .name       = "ringbuf-write",
 494         .args_type  = "device:s,data:s,format:s?",
 495         .mhandler.cmd_new = qmp_marshal_input_ringbuf_write,
 496     },
 497
 498 SQMP
 499 ringbuf-write
 500 -------------
 501
 502 Write to a ring buffer character device.
 503
 504 Arguments:
 505
 506 - "device": ring buffer character device name (json-string)
 507 - "data": data to write (json-string)
 508 - "format": data format (json-string, optional)
 509           - Possible values: "utf8" (default), "base64"
 510             Bug: invalid base64 is currently not rejected.
 511             Whitespace *is* invalid.
 512
 513 Example:
 514
 515 -> { "execute": "ringbuf-write",
 516                 "arguments": { "device": "foo",
 517                                "data": "abcdefgh",
 518                                "format": "utf8" } }
 519 <- { "return": {} }
 520
 521 EQMP
 522
 523     {
 524         .name       = "ringbuf-read",
 525         .args_type  = "device:s,size:i,format:s?",
 526         .mhandler.cmd_new = qmp_marshal_input_ringbuf_read,
 527     },
 528
 529 SQMP
 530 ringbuf-read
 531 -------------
 532
 533 Read from a ring buffer character device.
 534
 535 Arguments:
 536
 537 - "device": ring buffer character device name (json-string)
 538 - "size": how many bytes to read at most (json-int)
 539           - Number of data bytes, not number of characters in encoded data
 540 - "format": data format (json-string, optional)
 541           - Possible values: "utf8" (default), "base64"
 542           - Naturally, format "utf8" works only when the ring buffer
 543             contains valid UTF-8 text.  Invalid UTF-8 sequences get
 544             replaced.  Bug: replacement doesn't work.  Bug: can screw
 545             up on encountering NUL characters, after the ring buffer
 546             lost data, and when reading stops because the size limit
 547             is reached.
 548
 549 Example:
 550
 551 -> { "execute": "ringbuf-read",
 552                 "arguments": { "device": "foo",
 553                                "size": 1000,
 554                                "format": "utf8" } }
 555 <- {"return": "abcdefgh"}
 556
 557 EQMP
 558
 559     {
 560         .name       = "xen-save-devices-state",
 561         .args_type  = "filename:F",
 562     .mhandler.cmd_new = qmp_marshal_input_xen_save_devices_state,
 563     },
 564
 565 SQMP
 566 xen-save-devices-state
 567 -------
 568
 569 Save the state of all devices to file. The RAM and the block devices
 570 of the VM are not saved by this command.
 571
 572 Arguments:
 573
 574 - "filename": the file to save the state of the devices to as binary
 575 data. See xen-save-devices-state.txt for a description of the binary
 576 format.
 577
 578 Example:
 579
 580 -> { "execute": "xen-save-devices-state",
 581      "arguments": { "filename": "/tmp/save" } }
 582 <- { "return": {} }
 583
 584 EQMP
 585
 586     {
 587         .name       = "xen-set-global-dirty-log",
 588         .args_type  = "enable:b",
 589         .mhandler.cmd_new = qmp_marshal_input_xen_set_global_dirty_log,
 590     },
 591
 592 SQMP
 593 xen-set-global-dirty-log
 594 -------
 595
 596 Enable or disable the global dirty log mode.
 597
 598 Arguments:
 599
 600 - "enable": Enable it or disable it.
 601
 602 Example:
 603
 604 -> { "execute": "xen-set-global-dirty-log",
 605      "arguments": { "enable": true } }
 606 <- { "return": {} }
 607
 608 EQMP
 609
 610     {
 611         .name       = "migrate",
 612         .args_type  = "detach:-d,blk:-b,inc:-i,uri:s",
 613         .mhandler.cmd_new = qmp_marshal_input_migrate,
 614     },
 615
 616 SQMP
 617 migrate
 618 -------
 619
 620 Migrate to URI.
 621
 622 Arguments:
 623
 624 - "blk": block migration, full disk copy (json-bool, optional)
 625 - "inc": incremental disk copy (json-bool, optional)
 626 - "uri": Destination URI (json-string)
 627
 628 Example:
 629
 630 -> { "execute": "migrate", "arguments": { "uri": "tcp:0:4446" } }
 631 <- { "return": {} }
 632
 633 Notes:
 634
 635 (1) The 'query-migrate' command should be used to check migration's progress
 636     and final result (this information is provided by the 'status' member)
 637 (2) All boolean arguments default to false
 638 (3) The user Monitor's "detach" argument is invalid in QMP and should not
 639     be used
 640
 641 EQMP
 642
 643     {
 644         .name       = "migrate_cancel",
 645         .args_type  = "",
 646         .mhandler.cmd_new = qmp_marshal_input_migrate_cancel,
 647     },
 648
 649 SQMP
 650 migrate_cancel
 651 --------------
 652
 653 Cancel the current migration.
 654
 655 Arguments: None.
 656
 657 Example:
 658
 659 -> { "execute": "migrate_cancel" }
 660 <- { "return": {} }
 661
 662 EQMP
 663
 664     {
 665         .name       = "migrate-incoming",
 666         .args_type  = "uri:s",
 667         .mhandler.cmd_new = qmp_marshal_input_migrate_incoming,
 668     },
 669
 670 SQMP
 671 migrate-incoming
 672 ----------------
 673
 674 Continue an incoming migration
 675
 676 Arguments:
 677
 678 - "uri": Source/listening URI (json-string)
 679
 680 Example:
 681
 682 -> { "execute": "migrate-incoming", "arguments": { "uri": "tcp::4446" } }
 683 <- { "return": {} }
 684
 685 Notes:
 686
 687 (1) QEMU must be started with -incoming defer to allow migrate-incoming to
 688     be used
 689 (2) The uri format is the same as to -incoming
 690
 691 EQMP
 692     {
 693         .name       = "migrate-set-cache-size",
 694         .args_type  = "value:o",
 695         .mhandler.cmd_new = qmp_marshal_input_migrate_set_cache_size,
 696     },
 697
 698 SQMP
 699 migrate-set-cache-size
 700 ----------------------
 701
 702 Set cache size to be used by XBZRLE migration, the cache size will be rounded
 703 down to the nearest power of 2
 704
 705 Arguments:
 706
 707 - "value": cache size in bytes (json-int)
 708
 709 Example:
 710
 711 -> { "execute": "migrate-set-cache-size", "arguments": { "value": 536870912 } }
 712 <- { "return": {} }
 713
 714 EQMP
 715     {
 716         .name       = "query-migrate-cache-size",
 717         .args_type  = "",
 718         .mhandler.cmd_new = qmp_marshal_input_query_migrate_cache_size,
 719     },
 720
 721 SQMP
 722 query-migrate-cache-size
 723 ------------------------
 724
 725 Show cache size to be used by XBZRLE migration
 726
 727 returns a json-object with the following information:
 728 - "size" : json-int
 729
 730 Example:
 731
 732 -> { "execute": "query-migrate-cache-size" }
 733 <- { "return": 67108864 }
 734
 735 EQMP
 736
 737     {
 738         .name       = "migrate_set_speed",
 739         .args_type  = "value:o",
 740         .mhandler.cmd_new = qmp_marshal_input_migrate_set_speed,
 741     },
 742
 743 SQMP
 744 migrate_set_speed
 745 -----------------
 746
 747 Set maximum speed for migrations.
 748
 749 Arguments:
 750
 751 - "value": maximum speed, in bytes per second (json-int)
 752
 753 Example:
 754
 755 -> { "execute": "migrate_set_speed", "arguments": { "value": 1024 } }
 756 <- { "return": {} }
 757
 758 EQMP
 759
 760     {
 761         .name       = "migrate_set_downtime",
 762         .args_type  = "value:T",
 763         .mhandler.cmd_new = qmp_marshal_input_migrate_set_downtime,
 764     },
 765
 766 SQMP
 767 migrate_set_downtime
 768 --------------------
 769
 770 Set maximum tolerated downtime (in seconds) for migrations.
 771
 772 Arguments:
 773
 774 - "value": maximum downtime (json-number)
 775
 776 Example:
 777
 778 -> { "execute": "migrate_set_downtime", "arguments": { "value": 0.1 } }
 779 <- { "return": {} }
 780
 781 EQMP
 782
 783     {
 784         .name       = "client_migrate_info",
 785         .args_type  = "protocol:s,hostname:s,port:i?,tls-port:i?,cert-subject:s?",
 786         .params     = "protocol hostname port tls-port cert-subject",
 787         .help       = "set migration information for remote display",
 788         .mhandler.cmd_new = qmp_marshal_input_client_migrate_info,
 789     },
 790
 791 SQMP
 792 client_migrate_info
 793 -------------------
 794
 795 Set migration information for remote display.  This makes the server
 796 ask the client to automatically reconnect using the new parameters
 797 once migration finished successfully.  Only implemented for SPICE.
 798
 799 Arguments:
 800
 801 - "protocol":     must be "spice" (json-string)
 802 - "hostname":     migration target hostname (json-string)
 803 - "port":         spice tcp port for plaintext channels (json-int, optional)
 804 - "tls-port":     spice tcp port for tls-secured channels (json-int, optional)
 805 - "cert-subject": server certificate subject (json-string, optional)
 806
 807 Example:
 808
 809 -> { "execute": "client_migrate_info",
 810      "arguments": { "protocol": "spice",
 811                     "hostname": "virt42.lab.kraxel.org",
 812                     "port": 1234 } }
 813 <- { "return": {} }
 814
 815 EQMP
 816
 817     {
 818         .name       = "dump-guest-memory",
 819         .args_type  = "paging:b,protocol:s,begin:i?,end:i?,format:s?",
 820         .params     = "-p protocol [begin] [length] [format]",
 821         .help       = "dump guest memory to file",
 822         .mhandler.cmd_new = qmp_marshal_input_dump_guest_memory,
 823     },
 824
 825 SQMP
 826 dump
 827
 828
 829 Dump guest memory to file. The file can be processed with crash or gdb.
 830
 831 Arguments:
 832
 833 - "paging": do paging to get guest's memory mapping (json-bool)
 834 - "protocol": destination file(started with "file:") or destination file
 835               descriptor (started with "fd:") (json-string)
 836 - "begin": the starting physical address. It's optional, and should be specified
 837            with length together (json-int)
 838 - "length": the memory size, in bytes. It's optional, and should be specified
 839             with begin together (json-int)
 840 - "format": the format of guest memory dump. It's optional, and can be
 841             elf|kdump-zlib|kdump-lzo|kdump-snappy, but non-elf formats will
 842             conflict with paging and filter, ie. begin and length (json-string)
 843
 844 Example:
 845
 846 -> { "execute": "dump-guest-memory", "arguments": { "protocol": "fd:dump" } }
 847 <- { "return": {} }
 848
 849 Notes:
 850
 851 (1) All boolean arguments default to false
 852
 853 EQMP
 854
 855     {
 856         .name       = "query-dump-guest-memory-capability",
 857         .args_type  = "",
 858     .mhandler.cmd_new = qmp_marshal_input_query_dump_guest_memory_capability,
 859     },
 860
 861 SQMP
 862 query-dump-guest-memory-capability
 863 ----------
 864
 865 Show available formats for 'dump-guest-memory'
 866
 867 Example:
 868
 869 -> { "execute": "query-dump-guest-memory-capability" }
 870 <- { "return": { "formats":
 871                     ["elf", "kdump-zlib", "kdump-lzo", "kdump-snappy"] }
 872
 873 EQMP
 874
 875     {
 876         .name       = "netdev_add",
 877         .args_type  = "netdev:O",
 878         .mhandler.cmd_new = qmp_netdev_add,
 879     },
 880
 881 SQMP
 882 netdev_add
 883 ----------
 884
 885 Add host network device.
 886
 887 Arguments:
 888
 889 - "type": the device type, "tap", "user", ... (json-string)
 890 - "id": the device's ID, must be unique (json-string)
 891 - device options
 892
 893 Example:
 894
 895 -> { "execute": "netdev_add", "arguments": { "type": "user", "id": "netdev1" } }
 896 <- { "return": {} }
 897
 898 Note: The supported device options are the same ones supported by the '-netdev'
 899       command-line argument, which are listed in the '-help' output or QEMU's
 900       manual
 901
 902 EQMP
 903
 904     {
 905         .name       = "netdev_del",
 906         .args_type  = "id:s",
 907         .mhandler.cmd_new = qmp_marshal_input_netdev_del,
 908     },
 909
 910 SQMP
 911 netdev_del
 912 ----------
 913
 914 Remove host network device.
 915
 916 Arguments:
 917
 918 - "id": the device's ID, must be unique (json-string)
 919
 920 Example:
 921
 922 -> { "execute": "netdev_del", "arguments": { "id": "netdev1" } }
 923 <- { "return": {} }
 924
 925
 926 EQMP
 927
 928     {
 929         .name       = "object-add",
 930         .args_type  = "qom-type:s,id:s,props:q?",
 931         .mhandler.cmd_new = qmp_object_add,
 932     },
 933
 934 SQMP
 935 object-add
 936 ----------
 937
 938 Create QOM object.
 939
 940 Arguments:
 941
 942 - "qom-type": the object's QOM type, i.e. the class name (json-string)
 943 - "id": the object's ID, must be unique (json-string)
 944 - "props": a dictionary of object property values (optional, json-dict)
 945
 946 Example:
 947
 948 -> { "execute": "object-add", "arguments": { "qom-type": "rng-random", "id": "rng1",
 949      "props": { "filename": "/dev/hwrng" } } }
 950 <- { "return": {} }
 951
 952 EQMP
 953
 954     {
 955         .name       = "object-del",
 956         .args_type  = "id:s",
 957         .mhandler.cmd_new = qmp_marshal_input_object_del,
 958     },
 959
 960 SQMP
 961 object-del
 962 ----------
 963
 964 Remove QOM object.
 965
 966 Arguments:
 967
 968 - "id": the object's ID (json-string)
 969
 970 Example:
 971
 972 -> { "execute": "object-del", "arguments": { "id": "rng1" } }
 973 <- { "return": {} }
 974
 975
 976 EQMP
 977
 978
 979     {
 980         .name       = "block_resize",
 981         .args_type  = "device:s?,node-name:s?,size:o",
 982         .mhandler.cmd_new = qmp_marshal_input_block_resize,
 983     },
 984
 985 SQMP
 986 block_resize
 987 ------------
 988
 989 Resize a block image while a guest is running.
 990
 991 Arguments:
 992
 993 - "device": the device's ID, must be unique (json-string)
 994 - "node-name": the node name in the block driver state graph (json-string)
 995 - "size": new size
 996
 997 Example:
 998
 999 -> { "execute": "block_resize", "arguments": { "device": "scratch", "size": 1073741824 } }
1000 <- { "return": {} }
1001
1002 EQMP
1003
1004     {
1005         .name       = "block-stream",
1006         .args_type  = "device:B,base:s?,speed:o?,backing-file:s?,on-error:s?",
1007         .mhandler.cmd_new = qmp_marshal_input_block_stream,
1008     },
1009
1010 SQMP
1011 block-stream
1012 ------------
1013
1014 Copy data from a backing file into a block device.
1015
1016 Arguments:
1017
1018 - "device": The device's ID, must be unique (json-string)
1019 - "base": The file name of the backing image above which copying starts
1020           (json-string, optional)
1021 - "backing-file": The backing file string to write into the active layer. This
1022                   filename is not validated.
1023
1024                   If a pathname string is such that it cannot be resolved by
1025                   QEMU, that means that subsequent QMP or HMP commands must use
1026                   node-names for the image in question, as filename lookup
1027                   methods will fail.
1028
1029                   If not specified, QEMU will automatically determine the
1030                   backing file string to use, or error out if there is no
1031                   obvious choice.  Care should be taken when specifying the
1032                   string, to specify a valid filename or protocol.
1033                   (json-string, optional) (Since 2.1)
1034 - "speed":  the maximum speed, in bytes per second (json-int, optional)
1035 - "on-error": the action to take on an error (default 'report').  'stop' and
1036               'enospc' can only be used if the block device supports io-status.
1037               (json-string, optional) (Since 2.1)
1038
1039 Example:
1040
1041 -> { "execute": "block-stream", "arguments": { "device": "virtio0",
1042                                                "base": "/tmp/master.qcow2" } }
1043 <- { "return": {} }
1044
1045 EQMP
1046
1047     {
1048         .name       = "block-commit",
1049         .args_type  = "device:B,base:s?,top:s?,backing-file:s?,speed:o?",
1050         .mhandler.cmd_new = qmp_marshal_input_block_commit,
1051     },
1052
1053 SQMP
1054 block-commit
1055 ------------
1056
1057 Live commit of data from overlay image nodes into backing nodes - i.e., writes
1058 data between 'top' and 'base' into 'base'.
1059
1060 Arguments:
1061
1062 - "device": The device's ID, must be unique (json-string)
1063 - "base": The file name of the backing image to write data into.
1064           If not specified, this is the deepest backing image
1065           (json-string, optional)
1066 - "top":  The file name of the backing image within the image chain,
1067           which contains the topmost data to be committed down. If
1068           not specified, this is the active layer. (json-string, optional)
1069
1070 - backing-file:     The backing file string to write into the overlay
1071                     image of 'top'.  If 'top' is the active layer,
1072                     specifying a backing file string is an error. This
1073                     filename is not validated.
1074
1075                     If a pathname string is such that it cannot be
1076                     resolved by QEMU, that means that subsequent QMP or
1077                     HMP commands must use node-names for the image in
1078                     question, as filename lookup methods will fail.
1079
1080                     If not specified, QEMU will automatically determine
1081                     the backing file string to use, or error out if
1082                     there is no obvious choice. Care should be taken
1083                     when specifying the string, to specify a valid
1084                     filename or protocol.
1085                     (json-string, optional) (Since 2.1)
1086
1087           If top == base, that is an error.
1088           If top == active, the job will not be completed by itself,
1089           user needs to complete the job with the block-job-complete
1090           command after getting the ready event. (Since 2.0)
1091
1092           If the base image is smaller than top, then the base image
1093           will be resized to be the same size as top.  If top is
1094           smaller than the base image, the base will not be
1095           truncated.  If you want the base image size to match the
1096           size of the smaller top, you can safely truncate it
1097           yourself once the commit operation successfully completes.
1098           (json-string)
1099 - "speed":  the maximum speed, in bytes per second (json-int, optional)
1100
1101
1102 Example:
1103
1104 -> { "execute": "block-commit", "arguments": { "device": "virtio0",
1105                                               "top": "/tmp/snap1.qcow2" } }
1106 <- { "return": {} }
1107
1108 EQMP
1109
1110     {
1111         .name       = "drive-backup",
1112         .args_type  = "sync:s,device:B,target:s,speed:i?,mode:s?,format:s?,"
1113                       "bitmap:s?,on-source-error:s?,on-target-error:s?",
1114         .mhandler.cmd_new = qmp_marshal_input_drive_backup,
1115     },
1116
1117 SQMP
1118 drive-backup
1119 ------------
1120
1121 Start a point-in-time copy of a block device to a new destination.  The
1122 status of ongoing drive-backup operations can be checked with
1123 query-block-jobs where the BlockJobInfo.type field has the value 'backup'.
1124 The operation can be stopped before it has completed using the
1125 block-job-cancel command.
1126
1127 Arguments:
1128
1129 - "device": the name of the device which should be copied.
1130             (json-string)
1131 - "target": the target of the new image. If the file exists, or if it is a
1132             device, the existing file/device will be used as the new
1133             destination.  If it does not exist, a new file will be created.
1134             (json-string)
1135 - "format": the format of the new destination, default is to probe if 'mode' is
1136             'existing', else the format of the source
1137             (json-string, optional)
1138 - "sync": what parts of the disk image should be copied to the destination;
1139   possibilities include "full" for all the disk, "top" for only the sectors
1140   allocated in the topmost image, "dirty-bitmap" for only the dirty sectors in
1141   the bitmap, or "none" to only replicate new I/O (MirrorSyncMode).
1142 - "bitmap": dirty bitmap name for sync==dirty-bitmap. Must be present if sync
1143             is "dirty-bitmap", must NOT be present otherwise.
1144 - "mode": whether and how QEMU should create a new image
1145           (NewImageMode, optional, default 'absolute-paths')
1146 - "speed": the maximum speed, in bytes per second (json-int, optional)
1147 - "on-source-error": the action to take on an error on the source, default
1148                      'report'.  'stop' and 'enospc' can only be used
1149                      if the block device supports io-status.
1150                      (BlockdevOnError, optional)
1151 - "on-target-error": the action to take on an error on the target, default
1152                      'report' (no limitations, since this applies to
1153                      a different block device than device).
1154                      (BlockdevOnError, optional)
1155
1156 Example:
1157 -> { "execute": "drive-backup", "arguments": { "device": "drive0",
1158                                                "sync": "full",
1159                                                "target": "backup.img" } }
1160 <- { "return": {} }
1161
1162 EQMP
1163
1164     {
1165         .name       = "blockdev-backup",
1166         .args_type  = "sync:s,device:B,target:B,speed:i?,"
1167                       "on-source-error:s?,on-target-error:s?",
1168         .mhandler.cmd_new = qmp_marshal_input_blockdev_backup,
1169     },
1170
1171 SQMP
1172 blockdev-backup
1173 ---------------
1174
1175 The device version of drive-backup: this command takes an existing named device
1176 as backup target.
1177
1178 Arguments:
1179
1180 - "device": the name of the device which should be copied.
1181             (json-string)
1182 - "target": the name of the backup target device. (json-string)
1183 - "sync": what parts of the disk image should be copied to the destination;
1184           possibilities include "full" for all the disk, "top" for only the
1185           sectors allocated in the topmost image, or "none" to only replicate
1186           new I/O (MirrorSyncMode).
1187 - "speed": the maximum speed, in bytes per second (json-int, optional)
1188 - "on-source-error": the action to take on an error on the source, default
1189                      'report'.  'stop' and 'enospc' can only be used
1190                      if the block device supports io-status.
1191                      (BlockdevOnError, optional)
1192 - "on-target-error": the action to take on an error on the target, default
1193                      'report' (no limitations, since this applies to
1194                      a different block device than device).
1195                      (BlockdevOnError, optional)
1196
1197 Example:
1198 -> { "execute": "blockdev-backup", "arguments": { "device": "src-id",
1199                                                   "sync": "full",
1200                                                   "target": "tgt-id" } }
1201 <- { "return": {} }
1202
1203 EQMP
1204
1205     {
1206         .name       = "block-job-set-speed",
1207         .args_type  = "device:B,speed:o",
1208         .mhandler.cmd_new = qmp_marshal_input_block_job_set_speed,
1209     },
1210
1211     {
1212         .name       = "block-job-cancel",
1213         .args_type  = "device:B,force:b?",
1214         .mhandler.cmd_new = qmp_marshal_input_block_job_cancel,
1215     },
1216     {
1217         .name       = "block-job-pause",
1218         .args_type  = "device:B",
1219         .mhandler.cmd_new = qmp_marshal_input_block_job_pause,
1220     },
1221     {
1222         .name       = "block-job-resume",
1223         .args_type  = "device:B",
1224         .mhandler.cmd_new = qmp_marshal_input_block_job_resume,
1225     },
1226     {
1227         .name       = "block-job-complete",
1228         .args_type  = "device:B",
1229         .mhandler.cmd_new = qmp_marshal_input_block_job_complete,
1230     },
1231     {
1232         .name       = "transaction",
1233         .args_type  = "actions:q",
1234         .mhandler.cmd_new = qmp_marshal_input_transaction,
1235     },
1236
1237 SQMP
1238 transaction
1239 -----------
1240
1241 Atomically operate on one or more block devices.  The only supported operations
1242 for now are drive-backup, internal and external snapshotting.  A list of
1243 dictionaries is accepted, that contains the actions to be performed.
1244 If there is any failure performing any of the operations, all operations
1245 for the group are abandoned.
1246
1247 For external snapshots, the dictionary contains the device, the file to use for
1248 the new snapshot, and the format.  The default format, if not specified, is
1249 qcow2.
1250
1251 Each new snapshot defaults to being created by QEMU (wiping any
1252 contents if the file already exists), but it is also possible to reuse
1253 an externally-created file.  In the latter case, you should ensure that
1254 the new image file has the same contents as the current one; QEMU cannot
1255 perform any meaningful check.  Typically this is achieved by using the
1256 current image file as the backing file for the new image.
1257
1258 On failure, the original disks pre-snapshot attempt will be used.
1259
1260 For internal snapshots, the dictionary contains the device and the snapshot's
1261 name.  If an internal snapshot matching name already exists, the request will
1262 be rejected.  Only some image formats support it, for example, qcow2, rbd,
1263 and sheepdog.
1264
1265 On failure, qemu will try delete the newly created internal snapshot in the
1266 transaction.  When an I/O error occurs during deletion, the user needs to fix
1267 it later with qemu-img or other command.
1268
1269 Arguments:
1270
1271 actions array:
1272     - "type": the operation to perform.  The only supported
1273       value is "blockdev-snapshot-sync". (json-string)
1274     - "data": a dictionary.  The contents depend on the value
1275       of "type".  When "type" is "blockdev-snapshot-sync":
1276       - "device": device name to snapshot (json-string)
1277       - "node-name": graph node name to snapshot (json-string)
1278       - "snapshot-file": name of new image file (json-string)
1279       - "snapshot-node-name": graph node name of the new snapshot (json-string)
1280       - "format": format of new image (json-string, optional)
1281       - "mode": whether and how QEMU should create the snapshot file
1282         (NewImageMode, optional, default "absolute-paths")
1283       When "type" is "blockdev-snapshot-internal-sync":
1284       - "device": device name to snapshot (json-string)
1285       - "name": name of the new snapshot (json-string)
1286
1287 Example:
1288
1289 -> { "execute": "transaction",
1290      "arguments": { "actions": [
1291          { "type": "blockdev-snapshot-sync", "data" : { "device": "ide-hd0",
1292                                          "snapshot-file": "/some/place/my-image",
1293                                          "format": "qcow2" } },
1294          { "type": "blockdev-snapshot-sync", "data" : { "node-name": "myfile",
1295                                          "snapshot-file": "/some/place/my-image2",
1296                                          "snapshot-node-name": "node3432",
1297                                          "mode": "existing",
1298                                          "format": "qcow2" } },
1299          { "type": "blockdev-snapshot-sync", "data" : { "device": "ide-hd1",
1300                                          "snapshot-file": "/some/place/my-image2",
1301                                          "mode": "existing",
1302                                          "format": "qcow2" } },
1303          { "type": "blockdev-snapshot-internal-sync", "data" : {
1304                                          "device": "ide-hd2",
1305                                          "name": "snapshot0" } } ] } }
1306 <- { "return": {} }
1307
1308 EQMP
1309
1310     {
1311         .name       = "block-dirty-bitmap-add",
1312         .args_type  = "node:B,name:s,granularity:i?",
1313         .mhandler.cmd_new = qmp_marshal_input_block_dirty_bitmap_add,
1314     },
1315
1316 SQMP
1317
1318 block-dirty-bitmap-add
1319 ----------------------
1320 Since 2.4
1321
1322 Create a dirty bitmap with a name on the device, and start tracking the writes.
1323
1324 Arguments:
1325
1326 - "node": device/node on which to create dirty bitmap (json-string)
1327 - "name": name of the new dirty bitmap (json-string)
1328 - "granularity": granularity to track writes with (int, optional)
1329
1330 Example:
1331
1332 -> { "execute": "block-dirty-bitmap-add", "arguments": { "node": "drive0",
1333                                                    "name": "bitmap0" } }
1334 <- { "return": {} }
1335
1336 EQMP
1337
1338     {
1339         .name       = "block-dirty-bitmap-remove",
1340         .args_type  = "node:B,name:s",
1341         .mhandler.cmd_new = qmp_marshal_input_block_dirty_bitmap_remove,
1342     },
1343
1344 SQMP
1345
1346 block-dirty-bitmap-remove
1347 -------------------------
1348 Since 2.4
1349
1350 Stop write tracking and remove the dirty bitmap that was created with
1351 block-dirty-bitmap-add.
1352
1353 Arguments:
1354
1355 - "node": device/node on which to remove dirty bitmap (json-string)
1356 - "name": name of the dirty bitmap to remove (json-string)
1357
1358 Example:
1359
1360 -> { "execute": "block-dirty-bitmap-remove", "arguments": { "node": "drive0",
1361                                                       "name": "bitmap0" } }
1362 <- { "return": {} }
1363
1364 EQMP
1365
1366     {
1367         .name       = "block-dirty-bitmap-clear",
1368         .args_type  = "node:B,name:s",
1369         .mhandler.cmd_new = qmp_marshal_input_block_dirty_bitmap_clear,
1370     },
1371
1372 SQMP
1373
1374 block-dirty-bitmap-clear
1375 ------------------------
1376 Since 2.4
1377
1378 Reset the dirty bitmap associated with a node so that an incremental backup
1379 from this point in time forward will only backup clusters modified after this
1380 clear operation.
1381
1382 Arguments:
1383
1384 - "node": device/node on which to remove dirty bitmap (json-string)
1385 - "name": name of the dirty bitmap to remove (json-string)
1386
1387 Example:
1388
1389 -> { "execute": "block-dirty-bitmap-clear", "arguments": { "node": "drive0",
1390                                                            "name": "bitmap0" } }
1391 <- { "return": {} }
1392
1393 EQMP
1394
1395     {
1396         .name       = "blockdev-snapshot-sync",
1397         .args_type  = "device:s?,node-name:s?,snapshot-file:s,snapshot-node-name:s?,format:s?,mode:s?",
1398         .mhandler.cmd_new = qmp_marshal_input_blockdev_snapshot_sync,
1399     },
1400
1401 SQMP
1402 blockdev-snapshot-sync
1403 ----------------------
1404
1405 Synchronous snapshot of a block device. snapshot-file specifies the
1406 target of the new image. If the file exists, or if it is a device, the
1407 snapshot will be created in the existing file/device. If does not
1408 exist, a new file will be created. format specifies the format of the
1409 snapshot image, default is qcow2.
1410
1411 Arguments:
1412
1413 - "device": device name to snapshot (json-string)
1414 - "node-name": graph node name to snapshot (json-string)
1415 - "snapshot-file": name of new image file (json-string)
1416 - "snapshot-node-name": graph node name of the new snapshot (json-string)
1417 - "mode": whether and how QEMU should create the snapshot file
1418   (NewImageMode, optional, default "absolute-paths")
1419 - "format": format of new image (json-string, optional)
1420
1421 Example:
1422
1423 -> { "execute": "blockdev-snapshot-sync", "arguments": { "device": "ide-hd0",
1424                                                          "snapshot-file":
1425                                                         "/some/place/my-image",
1426                                                         "format": "qcow2" } }
1427 <- { "return": {} }
1428
1429 EQMP
1430
1431     {
1432         .name       = "blockdev-snapshot-internal-sync",
1433         .args_type  = "device:B,name:s",
1434         .mhandler.cmd_new = qmp_marshal_input_blockdev_snapshot_internal_sync,
1435     },
1436
1437 SQMP
1438 blockdev-snapshot-internal-sync
1439 -------------------------------
1440
1441 Synchronously take an internal snapshot of a block device when the format of
1442 image used supports it.  If the name is an empty string, or a snapshot with
1443 name already exists, the operation will fail.
1444
1445 Arguments:
1446
1447 - "device": device name to snapshot (json-string)
1448 - "name": name of the new snapshot (json-string)
1449
1450 Example:
1451
1452 -> { "execute": "blockdev-snapshot-internal-sync",
1453                 "arguments": { "device": "ide-hd0",
1454                                "name": "snapshot0" }
1455    }
1456 <- { "return": {} }
1457
1458 EQMP
1459
1460     {
1461         .name       = "blockdev-snapshot-delete-internal-sync",
1462         .args_type  = "device:B,id:s?,name:s?",
1463         .mhandler.cmd_new =
1464                       qmp_marshal_input_blockdev_snapshot_delete_internal_sync,
1465     },
1466
1467 SQMP
1468 blockdev-snapshot-delete-internal-sync
1469 --------------------------------------
1470
1471 Synchronously delete an internal snapshot of a block device when the format of
1472 image used supports it.  The snapshot is identified by name or id or both.  One
1473 of name or id is required.  If the snapshot is not found, the operation will
1474 fail.
1475
1476 Arguments:
1477
1478 - "device": device name (json-string)
1479 - "id": ID of the snapshot (json-string, optional)
1480 - "name": name of the snapshot (json-string, optional)
1481
1482 Example:
1483
1484 -> { "execute": "blockdev-snapshot-delete-internal-sync",
1485                 "arguments": { "device": "ide-hd0",
1486                                "name": "snapshot0" }
1487    }
1488 <- { "return": {
1489                    "id": "1",
1490                    "name": "snapshot0",
1491                    "vm-state-size": 0,
1492                    "date-sec": 1000012,
1493                    "date-nsec": 10,
1494                    "vm-clock-sec": 100,
1495                    "vm-clock-nsec": 20
1496      }
1497    }
1498
1499 EQMP
1500
1501     {
1502         .name       = "drive-mirror",
1503         .args_type  = "sync:s,device:B,target:s,speed:i?,mode:s?,format:s?,"
1504                       "node-name:s?,replaces:s?,"
1505                       "on-source-error:s?,on-target-error:s?,"
1506                       "granularity:i?,buf-size:i?",
1507         .mhandler.cmd_new = qmp_marshal_input_drive_mirror,
1508     },
1509
1510 SQMP
1511 drive-mirror
1512 ------------
1513
1514 Start mirroring a block device's writes to a new destination. target
1515 specifies the target of the new image. If the file exists, or if it is
1516 a device, it will be used as the new destination for writes. If it does not
1517 exist, a new file will be created. format specifies the format of the
1518 mirror image, default is to probe if mode='existing', else the format
1519 of the source.
1520
1521 Arguments:
1522
1523 - "device": device name to operate on (json-string)
1524 - "target": name of new image file (json-string)
1525 - "format": format of new image (json-string, optional)
1526 - "node-name": the name of the new block driver state in the node graph
1527                (json-string, optional)
1528 - "replaces": the block driver node name to replace when finished
1529               (json-string, optional)
1530 - "mode": how an image file should be created into the target
1531   file/device (NewImageMode, optional, default 'absolute-paths')
1532 - "speed": maximum speed of the streaming job, in bytes per second
1533   (json-int)
1534 - "granularity": granularity of the dirty bitmap, in bytes (json-int, optional)
1535 - "buf_size": maximum amount of data in flight from source to target, in bytes
1536   (json-int, default 10M)
1537 - "sync": what parts of the disk image should be copied to the destination;
1538   possibilities include "full" for all the disk, "top" for only the sectors
1539   allocated in the topmost image, or "none" to only replicate new I/O
1540   (MirrorSyncMode).
1541 - "on-source-error": the action to take on an error on the source
1542   (BlockdevOnError, default 'report')
1543 - "on-target-error": the action to take on an error on the target
1544   (BlockdevOnError, default 'report')
1545
1546 The default value of the granularity is the image cluster size clamped
1547 between 4096 and 65536, if the image format defines one.  If the format
1548 does not define a cluster size, the default value of the granularity
1549 is 65536.
1550
1551
1552 Example:
1553
1554 -> { "execute": "drive-mirror", "arguments": { "device": "ide-hd0",
1555                                                "target": "/some/place/my-image",
1556                                                "sync": "full",
1557                                                "format": "qcow2" } }
1558 <- { "return": {} }
1559
1560 EQMP
1561
1562     {
1563         .name       = "change-backing-file",
1564         .args_type  = "device:s,image-node-name:s,backing-file:s",
1565         .mhandler.cmd_new = qmp_marshal_input_change_backing_file,
1566     },
1567
1568 SQMP
1569 change-backing-file
1570 -------------------
1571 Since: 2.1
1572
1573 Change the backing file in the image file metadata.  This does not cause
1574 QEMU to reopen the image file to reparse the backing filename (it may,
1575 however, perform a reopen to change permissions from r/o -> r/w -> r/o,
1576 if needed). The new backing file string is written into the image file
1577 metadata, and the QEMU internal strings are updated.
1578
1579 Arguments:
1580
1581 - "image-node-name":    The name of the block driver state node of the
1582                         image to modify.  The "device" is argument is used to
1583                         verify "image-node-name" is in the chain described by
1584                         "device".
1585                         (json-string, optional)
1586
1587 - "device":             The name of the device.
1588                         (json-string)
1589
1590 - "backing-file":       The string to write as the backing file.  This string is
1591                         not validated, so care should be taken when specifying
1592                         the string or the image chain may not be able to be
1593                         reopened again.
1594                         (json-string)
1595
1596 Returns: Nothing on success
1597          If "device" does not exist or cannot be determined, DeviceNotFound
1598
1599 EQMP
1600
1601     {
1602         .name       = "balloon",
1603         .args_type  = "value:M",
1604         .mhandler.cmd_new = qmp_marshal_input_balloon,
1605     },
1606
1607 SQMP
1608 balloon
1609 -------
1610
1611 Request VM to change its memory allocation (in bytes).
1612
1613 Arguments:
1614
1615 - "value": New memory allocation (json-int)
1616
1617 Example:
1618
1619 -> { "execute": "balloon", "arguments": { "value": 536870912 } }
1620 <- { "return": {} }
1621
1622 EQMP
1623
1624     {
1625         .name       = "set_link",
1626         .args_type  = "name:s,up:b",
1627         .mhandler.cmd_new = qmp_marshal_input_set_link,
1628     },
1629
1630 SQMP
1631 set_link
1632 --------
1633
1634 Change the link status of a network adapter.
1635
1636 Arguments:
1637
1638 - "name": network device name (json-string)
1639 - "up": status is up (json-bool)
1640
1641 Example:
1642
1643 -> { "execute": "set_link", "arguments": { "name": "e1000.0", "up": false } }
1644 <- { "return": {} }
1645
1646 EQMP
1647
1648     {
1649         .name       = "getfd",
1650         .args_type  = "fdname:s",
1651         .params     = "getfd name",
1652         .help       = "receive a file descriptor via SCM rights and assign it a name",
1653         .mhandler.cmd_new = qmp_marshal_input_getfd,
1654     },
1655
1656 SQMP
1657 getfd
1658 -----
1659
1660 Receive a file descriptor via SCM rights and assign it a name.
1661
1662 Arguments:
1663
1664 - "fdname": file descriptor name (json-string)
1665
1666 Example:
1667
1668 -> { "execute": "getfd", "arguments": { "fdname": "fd1" } }
1669 <- { "return": {} }
1670
1671 Notes:
1672
1673 (1) If the name specified by the "fdname" argument already exists,
1674     the file descriptor assigned to it will be closed and replaced
1675     by the received file descriptor.
1676 (2) The 'closefd' command can be used to explicitly close the file
1677     descriptor when it is no longer needed.
1678
1679 EQMP
1680
1681     {
1682         .name       = "closefd",
1683         .args_type  = "fdname:s",
1684         .params     = "closefd name",
1685         .help       = "close a file descriptor previously passed via SCM rights",
1686         .mhandler.cmd_new = qmp_marshal_input_closefd,
1687     },
1688
1689 SQMP
1690 closefd
1691 -------
1692
1693 Close a file descriptor previously passed via SCM rights.
1694
1695 Arguments:
1696
1697 - "fdname": file descriptor name (json-string)
1698
1699 Example:
1700
1701 -> { "execute": "closefd", "arguments": { "fdname": "fd1" } }
1702 <- { "return": {} }
1703
1704 EQMP
1705
1706      {
1707         .name       = "add-fd",
1708         .args_type  = "fdset-id:i?,opaque:s?",
1709         .params     = "add-fd fdset-id opaque",
1710         .help       = "Add a file descriptor, that was passed via SCM rights, to an fd set",
1711         .mhandler.cmd_new = qmp_marshal_input_add_fd,
1712     },
1713
1714 SQMP
1715 add-fd
1716 -------
1717
1718 Add a file descriptor, that was passed via SCM rights, to an fd set.
1719
1720 Arguments:
1721
1722 - "fdset-id": The ID of the fd set to add the file descriptor to.
1723               (json-int, optional)
1724 - "opaque": A free-form string that can be used to describe the fd.
1725             (json-string, optional)
1726
1727 Return a json-object with the following information:
1728
1729 - "fdset-id": The ID of the fd set that the fd was added to. (json-int)
1730 - "fd": The file descriptor that was received via SCM rights and added to the
1731         fd set. (json-int)
1732
1733 Example:
1734
1735 -> { "execute": "add-fd", "arguments": { "fdset-id": 1 } }
1736 <- { "return": { "fdset-id": 1, "fd": 3 } }
1737
1738 Notes:
1739
1740 (1) The list of fd sets is shared by all monitor connections.
1741 (2) If "fdset-id" is not specified, a new fd set will be created.
1742
1743 EQMP
1744
1745      {
1746         .name       = "remove-fd",
1747         .args_type  = "fdset-id:i,fd:i?",
1748         .params     = "remove-fd fdset-id fd",
1749         .help       = "Remove a file descriptor from an fd set",
1750         .mhandler.cmd_new = qmp_marshal_input_remove_fd,
1751     },
1752
1753 SQMP
1754 remove-fd
1755 ---------
1756
1757 Remove a file descriptor from an fd set.
1758
1759 Arguments:
1760
1761 - "fdset-id": The ID of the fd set that the file descriptor belongs to.
1762               (json-int)
1763 - "fd": The file descriptor that is to be removed. (json-int, optional)
1764
1765 Example:
1766
1767 -> { "execute": "remove-fd", "arguments": { "fdset-id": 1, "fd": 3 } }
1768 <- { "return": {} }
1769
1770 Notes:
1771
1772 (1) The list of fd sets is shared by all monitor connections.
1773 (2) If "fd" is not specified, all file descriptors in "fdset-id" will be
1774     removed.
1775
1776 EQMP
1777
1778     {
1779         .name       = "query-fdsets",
1780         .args_type  = "",
1781         .help       = "Return information describing all fd sets",
1782         .mhandler.cmd_new = qmp_marshal_input_query_fdsets,
1783     },
1784
1785 SQMP
1786 query-fdsets
1787 -------------
1788
1789 Return information describing all fd sets.
1790
1791 Arguments: None
1792
1793 Example:
1794
1795 -> { "execute": "query-fdsets" }
1796 <- { "return": [
1797        {
1798          "fds": [
1799            {
1800              "fd": 30,
1801              "opaque": "rdonly:/path/to/file"
1802            },
1803            {
1804              "fd": 24,
1805              "opaque": "rdwr:/path/to/file"
1806            }
1807          ],
1808          "fdset-id": 1
1809        },
1810        {
1811          "fds": [
1812            {
1813              "fd": 28
1814            },
1815            {
1816              "fd": 29
1817            }
1818          ],
1819          "fdset-id": 0
1820        }
1821      ]
1822    }
1823
1824 Note: The list of fd sets is shared by all monitor connections.
1825
1826 EQMP
1827
1828     {
1829         .name       = "block_passwd",
1830         .args_type  = "device:s?,node-name:s?,password:s",
1831         .mhandler.cmd_new = qmp_marshal_input_block_passwd,
1832     },
1833
1834 SQMP
1835 block_passwd
1836 ------------
1837
1838 Set the password of encrypted block devices.
1839
1840 Arguments:
1841
1842 - "device": device name (json-string)
1843 - "node-name": name in the block driver state graph (json-string)
1844 - "password": password (json-string)
1845
1846 Example:
1847
1848 -> { "execute": "block_passwd", "arguments": { "device": "ide0-hd0",
1849                                                "password": "12345" } }
1850 <- { "return": {} }
1851
1852 EQMP
1853
1854     {
1855         .name       = "block_set_io_throttle",
1856         .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?,group:s?",
1857         .mhandler.cmd_new = qmp_marshal_input_block_set_io_throttle,
1858     },
1859
1860 SQMP
1861 block_set_io_throttle
1862 ------------
1863
1864 Change I/O throttle limits for a block drive.
1865
1866 Arguments:
1867
1868 - "device": device name (json-string)
1869 - "bps": total throughput limit in bytes per second (json-int)
1870 - "bps_rd": read throughput limit in bytes per second (json-int)
1871 - "bps_wr": write throughput limit in bytes per second (json-int)
1872 - "iops": total I/O operations per second (json-int)
1873 - "iops_rd": read I/O operations per second (json-int)
1874 - "iops_wr": write I/O operations per second (json-int)
1875 - "bps_max":  total max in bytes (json-int)
1876 - "bps_rd_max":  read max in bytes (json-int)
1877 - "bps_wr_max":  write max in bytes (json-int)
1878 - "iops_max":  total I/O operations max (json-int)
1879 - "iops_rd_max":  read I/O operations max (json-int)
1880 - "iops_wr_max":  write I/O operations max (json-int)
1881 - "iops_size":  I/O size in bytes when limiting (json-int)
1882 - "group": throttle group name (json-string)
1883
1884 Example:
1885
1886 -> { "execute": "block_set_io_throttle", "arguments": { "device": "virtio0",
1887                                                "bps": 1000000,
1888                                                "bps_rd": 0,
1889                                                "bps_wr": 0,
1890                                                "iops": 0,
1891                                                "iops_rd": 0,
1892                                                "iops_wr": 0,
1893                                                "bps_max": 8000000,
1894                                                "bps_rd_max": 0,
1895                                                "bps_wr_max": 0,
1896                                                "iops_max": 0,
1897                                                "iops_rd_max": 0,
1898                                                "iops_wr_max": 0,
1899                                                "iops_size": 0 } }
1900 <- { "return": {} }
1901
1902 EQMP
1903
1904     {
1905         .name       = "set_password",
1906         .args_type  = "protocol:s,password:s,connected:s?",
1907         .mhandler.cmd_new = qmp_marshal_input_set_password,
1908     },
1909
1910 SQMP
1911 set_password
1912 ------------
1913
1914 Set the password for vnc/spice protocols.
1915
1916 Arguments:
1917
1918 - "protocol": protocol name (json-string)
1919 - "password": password (json-string)
1920 - "connected": [ keep | disconnect | fail ] (json-string, optional)
1921
1922 Example:
1923
1924 -> { "execute": "set_password", "arguments": { "protocol": "vnc",
1925                                                "password": "secret" } }
1926 <- { "return": {} }
1927
1928 EQMP
1929
1930     {
1931         .name       = "expire_password",
1932         .args_type  = "protocol:s,time:s",
1933         .mhandler.cmd_new = qmp_marshal_input_expire_password,
1934     },
1935
1936 SQMP
1937 expire_password
1938 ---------------
1939
1940 Set the password expire time for vnc/spice protocols.
1941
1942 Arguments:
1943
1944 - "protocol": protocol name (json-string)
1945 - "time": [ now | never | +secs | secs ] (json-string)
1946
1947 Example:
1948
1949 -> { "execute": "expire_password", "arguments": { "protocol": "vnc",
1950                                                   "time": "+60" } }
1951 <- { "return": {} }
1952
1953 EQMP
1954
1955     {
1956         .name       = "add_client",
1957         .args_type  = "protocol:s,fdname:s,skipauth:b?,tls:b?",
1958         .mhandler.cmd_new = qmp_marshal_input_add_client,
1959     },
1960
1961 SQMP
1962 add_client
1963 ----------
1964
1965 Add a graphics client
1966
1967 Arguments:
1968
1969 - "protocol": protocol name (json-string)
1970 - "fdname": file descriptor name (json-string)
1971 - "skipauth": whether to skip authentication (json-bool, optional)
1972 - "tls": whether to perform TLS (json-bool, optional)
1973
1974 Example:
1975
1976 -> { "execute": "add_client", "arguments": { "protocol": "vnc",
1977                                              "fdname": "myclient" } }
1978 <- { "return": {} }
1979
1980 EQMP
1981     {
1982         .name       = "qmp_capabilities",
1983         .args_type  = "",
1984         .params     = "",
1985         .help       = "enable QMP capabilities",
1986         .mhandler.cmd_new = do_qmp_capabilities,
1987     },
1988
1989 SQMP
1990 qmp_capabilities
1991 ----------------
1992
1993 Enable QMP capabilities.
1994
1995 Arguments: None.
1996
1997 Example:
1998
1999 -> { "execute": "qmp_capabilities" }
2000 <- { "return": {} }
2001
2002 Note: This command must be issued before issuing any other command.
2003
2004 EQMP
2005
2006     {
2007         .name       = "human-monitor-command",
2008         .args_type  = "command-line:s,cpu-index:i?",
2009         .mhandler.cmd_new = qmp_marshal_input_human_monitor_command,
2010     },
2011
2012 SQMP
2013 human-monitor-command
2014 ---------------------
2015
2016 Execute a Human Monitor command.
2017
2018 Arguments:
2019
2020 - command-line: the command name and its arguments, just like the
2021                 Human Monitor's shell (json-string)
2022 - cpu-index: select the CPU number to be used by commands which access CPU
2023              data, like 'info registers'. The Monitor selects CPU 0 if this
2024              argument is not provided (json-int, optional)
2025
2026 Example:
2027
2028 -> { "execute": "human-monitor-command", "arguments": { "command-line": "info kvm" } }
2029 <- { "return": "kvm support: enabled\r\n" }
2030
2031 Notes:
2032
2033 (1) The Human Monitor is NOT an stable interface, this means that command
2034     names, arguments and responses can change or be removed at ANY time.
2035     Applications that rely on long term stability guarantees should NOT
2036     use this command
2037
2038 (2) Limitations:
2039
2040     o This command is stateless, this means that commands that depend
2041       on state information (such as getfd) might not work
2042
2043     o Commands that prompt the user for data (eg. 'cont' when the block
2044       device is encrypted) don't currently work
2045
2046 3. Query Commands
2047 =================
2048
2049 HXCOMM Each query command below is inside a SQMP/EQMP section, do NOT change
2050 HXCOMM this! We will possibly move query commands definitions inside those
2051 HXCOMM sections, just like regular commands.
2052
2053 EQMP
2054
2055 SQMP
2056 query-version
2057 -------------
2058
2059 Show QEMU version.
2060
2061 Return a json-object with the following information:
2062
2063 - "qemu": A json-object containing three integer values:
2064     - "major": QEMU's major version (json-int)
2065     - "minor": QEMU's minor version (json-int)
2066     - "micro": QEMU's micro version (json-int)
2067 - "package": package's version (json-string)
2068
2069 Example:
2070
2071 -> { "execute": "query-version" }
2072 <- {
2073       "return":{
2074          "qemu":{
2075             "major":0,
2076             "minor":11,
2077             "micro":5
2078          },
2079          "package":""
2080       }
2081    }
2082
2083 EQMP
2084
2085     {
2086         .name       = "query-version",
2087         .args_type  = "",
2088         .mhandler.cmd_new = qmp_marshal_input_query_version,
2089     },
2090
2091 SQMP
2092 query-commands
2093 --------------
2094
2095 List QMP available commands.
2096
2097 Each command is represented by a json-object, the returned value is a json-array
2098 of all commands.
2099
2100 Each json-object contain:
2101
2102 - "name": command's name (json-string)
2103
2104 Example:
2105
2106 -> { "execute": "query-commands" }
2107 <- {
2108       "return":[
2109          {
2110             "name":"query-balloon"
2111          },
2112          {
2113             "name":"system_powerdown"
2114          }
2115       ]
2116    }
2117
2118 Note: This example has been shortened as the real response is too long.
2119
2120 EQMP
2121
2122     {
2123         .name       = "query-commands",
2124         .args_type  = "",
2125         .mhandler.cmd_new = qmp_marshal_input_query_commands,
2126     },
2127
2128 SQMP
2129 query-events
2130 --------------
2131
2132 List QMP available events.
2133
2134 Each event is represented by a json-object, the returned value is a json-array
2135 of all events.
2136
2137 Each json-object contains:
2138
2139 - "name": event's name (json-string)
2140
2141 Example:
2142
2143 -> { "execute": "query-events" }
2144 <- {
2145       "return":[
2146          {
2147             "name":"SHUTDOWN"
2148          },
2149          {
2150             "name":"RESET"
2151          }
2152       ]
2153    }
2154
2155 Note: This example has been shortened as the real response is too long.
2156
2157 EQMP
2158
2159     {
2160         .name       = "query-events",
2161         .args_type  = "",
2162         .mhandler.cmd_new = qmp_marshal_input_query_events,
2163     },
2164
2165 SQMP
2166 query-chardev
2167 -------------
2168
2169 Each device is represented by a json-object. The returned value is a json-array
2170 of all devices.
2171
2172 Each json-object contain the following:
2173
2174 - "label": device's label (json-string)
2175 - "filename": device's file (json-string)
2176 - "frontend-open": open/closed state of the frontend device attached to this
2177                    backend (json-bool)
2178
2179 Example:
2180
2181 -> { "execute": "query-chardev" }
2182 <- {
2183       "return": [
2184          {
2185             "label": "charchannel0",
2186             "filename": "unix:/var/lib/libvirt/qemu/seabios.rhel6.agent,server",
2187             "frontend-open": false
2188          },
2189          {
2190             "label": "charmonitor",
2191             "filename": "unix:/var/lib/libvirt/qemu/seabios.rhel6.monitor,server",
2192             "frontend-open": true
2193          },
2194          {
2195             "label": "charserial0",
2196             "filename": "pty:/dev/pts/2",
2197             "frontend-open": true
2198          }
2199       ]
2200    }
2201
2202 EQMP
2203
2204     {
2205         .name       = "query-chardev",
2206         .args_type  = "",
2207         .mhandler.cmd_new = qmp_marshal_input_query_chardev,
2208     },
2209
2210 SQMP
2211 query-chardev-backends
2212 -------------
2213
2214 List available character device backends.
2215
2216 Each backend is represented by a json-object, the returned value is a json-array
2217 of all backends.
2218
2219 Each json-object contains:
2220
2221 - "name": backend name (json-string)
2222
2223 Example:
2224
2225 -> { "execute": "query-chardev-backends" }
2226 <- {
2227       "return":[
2228          {
2229             "name":"udp"
2230          },
2231          {
2232             "name":"tcp"
2233          },
2234          {
2235             "name":"unix"
2236          },
2237          {
2238             "name":"spiceport"
2239          }
2240       ]
2241    }
2242
2243 EQMP
2244
2245     {
2246         .name       = "query-chardev-backends",
2247         .args_type  = "",
2248         .mhandler.cmd_new = qmp_marshal_input_query_chardev_backends,
2249     },
2250
2251 SQMP
2252 query-block
2253 -----------
2254
2255 Show the block devices.
2256
2257 Each block device information is stored in a json-object and the returned value
2258 is a json-array of all devices.
2259
2260 Each json-object contain the following:
2261
2262 - "device": device name (json-string)
2263 - "type": device type (json-string)
2264          - deprecated, retained for backward compatibility
2265          - Possible values: "unknown"
2266 - "removable": true if the device is removable, false otherwise (json-bool)
2267 - "locked": true if the device is locked, false otherwise (json-bool)
2268 - "tray_open": only present if removable, true if the device has a tray,
2269                and it is open (json-bool)
2270 - "inserted": only present if the device is inserted, it is a json-object
2271    containing the following:
2272          - "file": device file name (json-string)
2273          - "ro": true if read-only, false otherwise (json-bool)
2274          - "drv": driver format name (json-string)
2275              - Possible values: "blkdebug", "bochs", "cloop", "dmg",
2276                                 "file", "file", "ftp", "ftps", "host_cdrom",
2277                                 "host_device", "http", "https",
2278                                 "nbd", "parallels", "qcow", "qcow2", "raw",
2279                                 "tftp", "vdi", "vmdk", "vpc", "vvfat"
2280          - "backing_file": backing file name (json-string, optional)
2281          - "backing_file_depth": number of files in the backing file chain (json-int)
2282          - "encrypted": true if encrypted, false otherwise (json-bool)
2283          - "bps": limit total bytes per second (json-int)
2284          - "bps_rd": limit read bytes per second (json-int)
2285          - "bps_wr": limit write bytes per second (json-int)
2286          - "iops": limit total I/O operations per second (json-int)
2287          - "iops_rd": limit read operations per second (json-int)
2288          - "iops_wr": limit write operations per second (json-int)
2289          - "bps_max":  total max in bytes (json-int)
2290          - "bps_rd_max":  read max in bytes (json-int)
2291          - "bps_wr_max":  write max in bytes (json-int)
2292          - "iops_max":  total I/O operations max (json-int)
2293          - "iops_rd_max":  read I/O operations max (json-int)
2294          - "iops_wr_max":  write I/O operations max (json-int)
2295          - "iops_size": I/O size when limiting by iops (json-int)
2296          - "detect_zeroes": detect and optimize zero writing (json-string)
2297              - Possible values: "off", "on", "unmap"
2298          - "write_threshold": write offset threshold in bytes, a event will be
2299                               emitted if crossed. Zero if disabled (json-int)
2300          - "image": the detail of the image, it is a json-object containing
2301             the following:
2302              - "filename": image file name (json-string)
2303              - "format": image format (json-string)
2304              - "virtual-size": image capacity in bytes (json-int)
2305              - "dirty-flag": true if image is not cleanly closed, not present
2306                              means clean (json-bool, optional)
2307              - "actual-size": actual size on disk in bytes of the image, not
2308                               present when image does not support thin
2309                               provision (json-int, optional)
2310              - "cluster-size": size of a cluster in bytes, not present if image
2311                                format does not support it (json-int, optional)
2312              - "encrypted": true if the image is encrypted, not present means
2313                             false or the image format does not support
2314                             encryption (json-bool, optional)
2315              - "backing_file": backing file name, not present means no backing
2316                                file is used or the image format does not
2317                                support backing file chain
2318                                (json-string, optional)
2319              - "full-backing-filename": full path of the backing file, not
2320                                         present if it equals backing_file or no
2321                                         backing file is used
2322                                         (json-string, optional)
2323              - "backing-filename-format": the format of the backing file, not
2324                                           present means unknown or no backing
2325                                           file (json-string, optional)
2326              - "snapshots": the internal snapshot info, it is an optional list
2327                 of json-object containing the following:
2328                  - "id": unique snapshot id (json-string)
2329                  - "name": snapshot name (json-string)
2330                  - "vm-state-size": size of the VM state in bytes (json-int)
2331                  - "date-sec": UTC date of the snapshot in seconds (json-int)
2332                  - "date-nsec": fractional part in nanoseconds to be used with
2333                                 date-sec (json-int)
2334                  - "vm-clock-sec": VM clock relative to boot in seconds
2335                                    (json-int)
2336                  - "vm-clock-nsec": fractional part in nanoseconds to be used
2337                                     with vm-clock-sec (json-int)
2338              - "backing-image": the detail of the backing image, it is an
2339                                 optional json-object only present when a
2340                                 backing image present for this image
2341
2342 - "io-status": I/O operation status, only present if the device supports it
2343                and the VM is configured to stop on errors. It's always reset
2344                to "ok" when the "cont" command is issued (json_string, optional)
2345              - Possible values: "ok", "failed", "nospace"
2346
2347 Example:
2348
2349 -> { "execute": "query-block" }
2350 <- {
2351       "return":[
2352          {
2353             "io-status": "ok",
2354             "device":"ide0-hd0",
2355             "locked":false,
2356             "removable":false,
2357             "inserted":{
2358                "ro":false,
2359                "drv":"qcow2",
2360                "encrypted":false,
2361                "file":"disks/test.qcow2",
2362                "backing_file_depth":1,
2363                "bps":1000000,
2364                "bps_rd":0,
2365                "bps_wr":0,
2366                "iops":1000000,
2367                "iops_rd":0,
2368                "iops_wr":0,
2369                "bps_max": 8000000,
2370                "bps_rd_max": 0,
2371                "bps_wr_max": 0,
2372                "iops_max": 0,
2373                "iops_rd_max": 0,
2374                "iops_wr_max": 0,
2375                "iops_size": 0,
2376                "detect_zeroes": "on",
2377                "write_threshold": 0,
2378                "image":{
2379                   "filename":"disks/test.qcow2",
2380                   "format":"qcow2",
2381                   "virtual-size":2048000,
2382                   "backing_file":"base.qcow2",
2383                   "full-backing-filename":"disks/base.qcow2",
2384                   "backing-filename-format":"qcow2",
2385                   "snapshots":[
2386                      {
2387                         "id": "1",
2388                         "name": "snapshot1",
2389                         "vm-state-size": 0,
2390                         "date-sec": 10000200,
2391                         "date-nsec": 12,
2392                         "vm-clock-sec": 206,
2393                         "vm-clock-nsec": 30
2394                      }
2395                   ],
2396                   "backing-image":{
2397                       "filename":"disks/base.qcow2",
2398                       "format":"qcow2",
2399                       "virtual-size":2048000
2400                   }
2401                }
2402             },
2403             "type":"unknown"
2404          },
2405          {
2406             "io-status": "ok",
2407             "device":"ide1-cd0",
2408             "locked":false,
2409             "removable":true,
2410             "type":"unknown"
2411          },
2412          {
2413             "device":"floppy0",
2414             "locked":false,
2415             "removable":true,
2416             "type":"unknown"
2417          },
2418          {
2419             "device":"sd0",
2420             "locked":false,
2421             "removable":true,
2422             "type":"unknown"
2423          }
2424       ]
2425    }
2426
2427 EQMP
2428
2429     {
2430         .name       = "query-block",
2431         .args_type  = "",
2432         .mhandler.cmd_new = qmp_marshal_input_query_block,
2433     },
2434
2435 SQMP
2436 query-blockstats
2437 ----------------
2438
2439 Show block device statistics.
2440
2441 Each device statistic information is stored in a json-object and the returned
2442 value is a json-array of all devices.
2443
2444 Each json-object contain the following:
2445
2446 - "device": device name (json-string)
2447 - "stats": A json-object with the statistics information, it contains:
2448     - "rd_bytes": bytes read (json-int)
2449     - "wr_bytes": bytes written (json-int)
2450     - "rd_operations": read operations (json-int)
2451     - "wr_operations": write operations (json-int)
2452     - "flush_operations": cache flush operations (json-int)
2453     - "wr_total_time_ns": total time spend on writes in nano-seconds (json-int)
2454     - "rd_total_time_ns": total time spend on reads in nano-seconds (json-int)
2455     - "flush_total_time_ns": total time spend on cache flushes in nano-seconds (json-int)
2456     - "wr_highest_offset": Highest offset of a sector written since the
2457                            BlockDriverState has been opened (json-int)
2458     - "rd_merged": number of read requests that have been merged into
2459                    another request (json-int)
2460     - "wr_merged": number of write requests that have been merged into
2461                    another request (json-int)
2462 - "parent": Contains recursively the statistics of the underlying
2463             protocol (e.g. the host file for a qcow2 image). If there is
2464             no underlying protocol, this field is omitted
2465             (json-object, optional)
2466
2467 Example:
2468
2469 -> { "execute": "query-blockstats" }
2470 <- {
2471       "return":[
2472          {
2473             "device":"ide0-hd0",
2474             "parent":{
2475                "stats":{
2476                   "wr_highest_offset":3686448128,
2477                   "wr_bytes":9786368,
2478                   "wr_operations":751,
2479                   "rd_bytes":122567168,
2480                   "rd_operations":36772
2481                   "wr_total_times_ns":313253456
2482                   "rd_total_times_ns":3465673657
2483                   "flush_total_times_ns":49653
2484                   "flush_operations":61,
2485                   "rd_merged":0,
2486                   "wr_merged":0
2487                }
2488             },
2489             "stats":{
2490                "wr_highest_offset":2821110784,
2491                "wr_bytes":9786368,
2492                "wr_operations":692,
2493                "rd_bytes":122739200,
2494                "rd_operations":36604
2495                "flush_operations":51,
2496                "wr_total_times_ns":313253456
2497                "rd_total_times_ns":3465673657
2498                "flush_total_times_ns":49653,
2499                "rd_merged":0,
2500                "wr_merged":0
2501             }
2502          },
2503          {
2504             "device":"ide1-cd0",
2505             "stats":{
2506                "wr_highest_offset":0,
2507                "wr_bytes":0,
2508                "wr_operations":0,
2509                "rd_bytes":0,
2510                "rd_operations":0
2511                "flush_operations":0,
2512                "wr_total_times_ns":0
2513                "rd_total_times_ns":0
2514                "flush_total_times_ns":0,
2515                "rd_merged":0,
2516                "wr_merged":0
2517             }
2518          },
2519          {
2520             "device":"floppy0",
2521             "stats":{
2522                "wr_highest_offset":0,
2523                "wr_bytes":0,
2524                "wr_operations":0,
2525                "rd_bytes":0,
2526                "rd_operations":0
2527                "flush_operations":0,
2528                "wr_total_times_ns":0
2529                "rd_total_times_ns":0
2530                "flush_total_times_ns":0,
2531                "rd_merged":0,
2532                "wr_merged":0
2533             }
2534          },
2535          {
2536             "device":"sd0",
2537             "stats":{
2538                "wr_highest_offset":0,
2539                "wr_bytes":0,
2540                "wr_operations":0,
2541                "rd_bytes":0,
2542                "rd_operations":0
2543                "flush_operations":0,
2544                "wr_total_times_ns":0
2545                "rd_total_times_ns":0
2546                "flush_total_times_ns":0,
2547                "rd_merged":0,
2548                "wr_merged":0
2549             }
2550          }
2551       ]
2552    }
2553
2554 EQMP
2555
2556     {
2557         .name       = "query-blockstats",
2558         .args_type  = "query-nodes:b?",
2559         .mhandler.cmd_new = qmp_marshal_input_query_blockstats,
2560     },
2561
2562 SQMP
2563 query-cpus
2564 ----------
2565
2566 Show CPU information.
2567
2568 Return a json-array. Each CPU is represented by a json-object, which contains:
2569
2570 - "CPU": CPU index (json-int)
2571 - "current": true if this is the current CPU, false otherwise (json-bool)
2572 - "halted": true if the cpu is halted, false otherwise (json-bool)
2573 - "qom_path": path to the CPU object in the QOM tree (json-str)
2574 - Current program counter. The key's name depends on the architecture:
2575      "pc": i386/x86_64 (json-int)
2576      "nip": PPC (json-int)
2577      "pc" and "npc": sparc (json-int)
2578      "PC": mips (json-int)
2579 - "thread_id": ID of the underlying host thread (json-int)
2580
2581 Example:
2582
2583 -> { "execute": "query-cpus" }
2584 <- {
2585       "return":[
2586          {
2587             "CPU":0,
2588             "current":true,
2589             "halted":false,
2590             "qom_path":"/machine/unattached/device[0]",
2591             "pc":3227107138,
2592             "thread_id":3134
2593          },
2594          {
2595             "CPU":1,
2596             "current":false,
2597             "halted":true,
2598             "qom_path":"/machine/unattached/device[2]",
2599             "pc":7108165,
2600             "thread_id":3135
2601          }
2602       ]
2603    }
2604
2605 EQMP
2606
2607     {
2608         .name       = "query-cpus",
2609         .args_type  = "",
2610         .mhandler.cmd_new = qmp_marshal_input_query_cpus,
2611     },
2612
2613 SQMP
2614 query-iothreads
2615 ---------------
2616
2617 Returns a list of information about each iothread.
2618
2619 Note this list excludes the QEMU main loop thread, which is not declared
2620 using the -object iothread command-line option.  It is always the main thread
2621 of the process.
2622
2623 Return a json-array. Each iothread is represented by a json-object, which contains:
2624
2625 - "id": name of iothread (json-str)
2626 - "thread-id": ID of the underlying host thread (json-int)
2627
2628 Example:
2629
2630 -> { "execute": "query-iothreads" }
2631 <- {
2632       "return":[
2633          {
2634             "id":"iothread0",
2635             "thread-id":3134
2636          },
2637          {
2638             "id":"iothread1",
2639             "thread-id":3135
2640          }
2641       ]
2642    }
2643
2644 EQMP
2645
2646     {
2647         .name       = "query-iothreads",
2648         .args_type  = "",
2649         .mhandler.cmd_new = qmp_marshal_input_query_iothreads,
2650     },
2651
2652 SQMP
2653 query-pci
2654 ---------
2655
2656 PCI buses and devices information.
2657
2658 The returned value is a json-array of all buses. Each bus is represented by
2659 a json-object, which has a key with a json-array of all PCI devices attached
2660 to it. Each device is represented by a json-object.
2661
2662 The bus json-object contains the following:
2663
2664 - "bus": bus number (json-int)
2665 - "devices": a json-array of json-objects, each json-object represents a
2666              PCI device
2667
2668 The PCI device json-object contains the following:
2669
2670 - "bus": identical to the parent's bus number (json-int)
2671 - "slot": slot number (json-int)
2672 - "function": function number (json-int)
2673 - "class_info": a json-object containing:
2674      - "desc": device class description (json-string, optional)
2675      - "class": device class number (json-int)
2676 - "id": a json-object containing:
2677      - "device": device ID (json-int)
2678      - "vendor": vendor ID (json-int)
2679 - "irq": device's IRQ if assigned (json-int, optional)
2680 - "qdev_id": qdev id string (json-string)
2681 - "pci_bridge": It's a json-object, only present if this device is a
2682                 PCI bridge, contains:
2683      - "bus": bus number (json-int)
2684      - "secondary": secondary bus number (json-int)
2685      - "subordinate": subordinate bus number (json-int)
2686      - "io_range": I/O memory range information, a json-object with the
2687                    following members:
2688                  - "base": base address, in bytes (json-int)
2689                  - "limit": limit address, in bytes (json-int)
2690      - "memory_range": memory range information, a json-object with the
2691                        following members:
2692                  - "base": base address, in bytes (json-int)
2693                  - "limit": limit address, in bytes (json-int)
2694      - "prefetchable_range": Prefetchable memory range information, a
2695                              json-object with the following members:
2696                  - "base": base address, in bytes (json-int)
2697                  - "limit": limit address, in bytes (json-int)
2698      - "devices": a json-array of PCI devices if there's any attached, each
2699                   each element is represented by a json-object, which contains
2700                   the same members of the 'PCI device json-object' described
2701                   above (optional)
2702 - "regions": a json-array of json-objects, each json-object represents a
2703              memory region of this device
2704
2705 The memory range json-object contains the following:
2706
2707 - "base": base memory address (json-int)
2708 - "limit": limit value (json-int)
2709
2710 The region json-object can be an I/O region or a memory region, an I/O region
2711 json-object contains the following:
2712
2713 - "type": "io" (json-string, fixed)
2714 - "bar": BAR number (json-int)
2715 - "address": memory address (json-int)
2716 - "size": memory size (json-int)
2717
2718 A memory region json-object contains the following:
2719
2720 - "type": "memory" (json-string, fixed)
2721 - "bar": BAR number (json-int)
2722 - "address": memory address (json-int)
2723 - "size": memory size (json-int)
2724 - "mem_type_64": true or false (json-bool)
2725 - "prefetch": true or false (json-bool)
2726
2727 Example:
2728
2729 -> { "execute": "query-pci" }
2730 <- {
2731       "return":[
2732          {
2733             "bus":0,
2734             "devices":[
2735                {
2736                   "bus":0,
2737                   "qdev_id":"",
2738                   "slot":0,
2739                   "class_info":{
2740                      "class":1536,
2741                      "desc":"Host bridge"
2742                   },
2743                   "id":{
2744                      "device":32902,
2745                      "vendor":4663
2746                   },
2747                   "function":0,
2748                   "regions":[
2749
2750                   ]
2751                },
2752                {
2753                   "bus":0,
2754                   "qdev_id":"",
2755                   "slot":1,
2756                   "class_info":{
2757                      "class":1537,
2758                      "desc":"ISA bridge"
2759                   },
2760                   "id":{
2761                      "device":32902,
2762                      "vendor":28672
2763                   },
2764                   "function":0,
2765                   "regions":[
2766
2767                   ]
2768                },
2769                {
2770                   "bus":0,
2771                   "qdev_id":"",
2772                   "slot":1,
2773                   "class_info":{
2774                      "class":257,
2775                      "desc":"IDE controller"
2776                   },
2777                   "id":{
2778                      "device":32902,
2779                      "vendor":28688
2780                   },
2781                   "function":1,
2782                   "regions":[
2783                      {
2784                         "bar":4,
2785                         "size":16,
2786                         "address":49152,
2787                         "type":"io"
2788                      }
2789                   ]
2790                },
2791                {
2792                   "bus":0,
2793                   "qdev_id":"",
2794                   "slot":2,
2795                   "class_info":{
2796                      "class":768,
2797                      "desc":"VGA controller"
2798                   },
2799                   "id":{
2800                      "device":4115,
2801                      "vendor":184
2802                   },
2803                   "function":0,
2804                   "regions":[
2805                      {
2806                         "prefetch":true,
2807                         "mem_type_64":false,
2808                         "bar":0,
2809                         "size":33554432,
2810                         "address":4026531840,
2811                         "type":"memory"
2812                      },
2813                      {
2814                         "prefetch":false,
2815                         "mem_type_64":false,
2816                         "bar":1,
2817                         "size":4096,
2818                         "address":4060086272,
2819                         "type":"memory"
2820                      },
2821                      {
2822                         "prefetch":false,
2823                         "mem_type_64":false,
2824                         "bar":6,
2825                         "size":65536,
2826                         "address":-1,
2827                         "type":"memory"
2828                      }
2829                   ]
2830                },
2831                {
2832                   "bus":0,
2833                   "qdev_id":"",
2834                   "irq":11,
2835                   "slot":4,
2836                   "class_info":{
2837                      "class":1280,
2838                      "desc":"RAM controller"
2839                   },
2840                   "id":{
2841                      "device":6900,
2842                      "vendor":4098
2843                   },
2844                   "function":0,
2845                   "regions":[
2846                      {
2847                         "bar":0,
2848                         "size":32,
2849                         "address":49280,
2850                         "type":"io"
2851                      }
2852                   ]
2853                }
2854             ]
2855          }
2856       ]
2857    }
2858
2859 Note: This example has been shortened as the real response is too long.
2860
2861 EQMP
2862
2863     {
2864         .name       = "query-pci",
2865         .args_type  = "",
2866         .mhandler.cmd_new = qmp_marshal_input_query_pci,
2867     },
2868
2869 SQMP
2870 query-kvm
2871 ---------
2872
2873 Show KVM information.
2874
2875 Return a json-object with the following information:
2876
2877 - "enabled": true if KVM support is enabled, false otherwise (json-bool)
2878 - "present": true if QEMU has KVM support, false otherwise (json-bool)
2879
2880 Example:
2881
2882 -> { "execute": "query-kvm" }
2883 <- { "return": { "enabled": true, "present": true } }
2884
2885 EQMP
2886
2887     {
2888         .name       = "query-kvm",
2889         .args_type  = "",
2890         .mhandler.cmd_new = qmp_marshal_input_query_kvm,
2891     },
2892
2893 SQMP
2894 query-status
2895 ------------
2896
2897 Return a json-object with the following information:
2898
2899 - "running": true if the VM is running, or false if it is paused (json-bool)
2900 - "singlestep": true if the VM is in single step mode,
2901                 false otherwise (json-bool)
2902 - "status": one of the following values (json-string)
2903     "debug" - QEMU is running on a debugger
2904     "inmigrate" - guest is paused waiting for an incoming migration
2905     "internal-error" - An internal error that prevents further guest
2906     execution has occurred
2907     "io-error" - the last IOP has failed and the device is configured
2908     to pause on I/O errors
2909     "paused" - guest has been paused via the 'stop' command
2910     "postmigrate" - guest is paused following a successful 'migrate'
2911     "prelaunch" - QEMU was started with -S and guest has not started
2912     "finish-migrate" - guest is paused to finish the migration process
2913     "restore-vm" - guest is paused to restore VM state
2914     "running" - guest is actively running
2915     "save-vm" - guest is paused to save the VM state
2916     "shutdown" - guest is shut down (and -no-shutdown is in use)
2917     "watchdog" - the watchdog action is configured to pause and
2918      has been triggered
2919
2920 Example:
2921
2922 -> { "execute": "query-status" }
2923 <- { "return": { "running": true, "singlestep": false, "status": "running" } }
2924
2925 EQMP
2926
2927     {
2928         .name       = "query-status",
2929         .args_type  = "",
2930         .mhandler.cmd_new = qmp_marshal_input_query_status,
2931     },
2932
2933 SQMP
2934 query-mice
2935 ----------
2936
2937 Show VM mice information.
2938
2939 Each mouse is represented by a json-object, the returned value is a json-array
2940 of all mice.
2941
2942 The mouse json-object contains the following:
2943
2944 - "name": mouse's name (json-string)
2945 - "index": mouse's index (json-int)
2946 - "current": true if this mouse is receiving events, false otherwise (json-bool)
2947 - "absolute": true if the mouse generates absolute input events (json-bool)
2948
2949 Example:
2950
2951 -> { "execute": "query-mice" }
2952 <- {
2953       "return":[
2954          {
2955             "name":"QEMU Microsoft Mouse",
2956             "index":0,
2957             "current":false,
2958             "absolute":false
2959          },
2960          {
2961             "name":"QEMU PS/2 Mouse",
2962             "index":1,
2963             "current":true,
2964             "absolute":true
2965          }
2966       ]
2967    }
2968
2969 EQMP
2970
2971     {
2972         .name       = "query-mice",
2973         .args_type  = "",
2974         .mhandler.cmd_new = qmp_marshal_input_query_mice,
2975     },
2976
2977 SQMP
2978 query-vnc
2979 ---------
2980
2981 Show VNC server information.
2982
2983 Return a json-object with server information. Connected clients are returned
2984 as a json-array of json-objects.
2985
2986 The main json-object contains the following:
2987
2988 - "enabled": true or false (json-bool)
2989 - "host": server's IP address (json-string)
2990 - "family": address family (json-string)
2991          - Possible values: "ipv4", "ipv6", "unix", "unknown"
2992 - "service": server's port number (json-string)
2993 - "auth": authentication method (json-string)
2994          - Possible values: "invalid", "none", "ra2", "ra2ne", "sasl", "tight",
2995                             "tls", "ultra", "unknown", "vencrypt", "vencrypt",
2996                             "vencrypt+plain", "vencrypt+tls+none",
2997                             "vencrypt+tls+plain", "vencrypt+tls+sasl",
2998                             "vencrypt+tls+vnc", "vencrypt+x509+none",
2999                             "vencrypt+x509+plain", "vencrypt+x509+sasl",
3000                             "vencrypt+x509+vnc", "vnc"
3001 - "clients": a json-array of all connected clients
3002
3003 Clients are described by a json-object, each one contain the following:
3004
3005 - "host": client's IP address (json-string)
3006 - "family": address family (json-string)
3007          - Possible values: "ipv4", "ipv6", "unix", "unknown"
3008 - "service": client's port number (json-string)
3009 - "x509_dname": TLS dname (json-string, optional)
3010 - "sasl_username": SASL username (json-string, optional)
3011
3012 Example:
3013
3014 -> { "execute": "query-vnc" }
3015 <- {
3016       "return":{
3017          "enabled":true,
3018          "host":"0.0.0.0",
3019          "service":"50402",
3020          "auth":"vnc",
3021          "family":"ipv4",
3022          "clients":[
3023             {
3024                "host":"127.0.0.1",
3025                "service":"50401",
3026                "family":"ipv4"
3027             }
3028          ]
3029       }
3030    }
3031
3032 EQMP
3033
3034     {
3035         .name       = "query-vnc",
3036         .args_type  = "",
3037         .mhandler.cmd_new = qmp_marshal_input_query_vnc,
3038     },
3039     {
3040         .name       = "query-vnc-servers",
3041         .args_type  = "",
3042         .mhandler.cmd_new = qmp_marshal_input_query_vnc_servers,
3043     },
3044
3045 SQMP
3046 query-spice
3047 -----------
3048
3049 Show SPICE server information.
3050
3051 Return a json-object with server information. Connected clients are returned
3052 as a json-array of json-objects.
3053
3054 The main json-object contains the following:
3055
3056 - "enabled": true or false (json-bool)
3057 - "host": server's IP address (json-string)
3058 - "port": server's port number (json-int, optional)
3059 - "tls-port": server's port number (json-int, optional)
3060 - "auth": authentication method (json-string)
3061          - Possible values: "none", "spice"
3062 - "channels": a json-array of all active channels clients
3063
3064 Channels are described by a json-object, each one contain the following:
3065
3066 - "host": client's IP address (json-string)
3067 - "family": address family (json-string)
3068          - Possible values: "ipv4", "ipv6", "unix", "unknown"
3069 - "port": client's port number (json-string)
3070 - "connection-id": spice connection id.  All channels with the same id
3071                    belong to the same spice session (json-int)
3072 - "channel-type": channel type.  "1" is the main control channel, filter for
3073                   this one if you want track spice sessions only (json-int)
3074 - "channel-id": channel id.  Usually "0", might be different needed when
3075                 multiple channels of the same type exist, such as multiple
3076                 display channels in a multihead setup (json-int)
3077 - "tls": whether the channel is encrypted (json-bool)
3078
3079 Example:
3080
3081 -> { "execute": "query-spice" }
3082 <- {
3083       "return": {
3084          "enabled": true,
3085          "auth": "spice",
3086          "port": 5920,
3087          "tls-port": 5921,
3088          "host": "0.0.0.0",
3089          "channels": [
3090             {
3091                "port": "54924",
3092                "family": "ipv4",
3093                "channel-type": 1,
3094                "connection-id": 1804289383,
3095                "host": "127.0.0.1",
3096                "channel-id": 0,
3097                "tls": true
3098             },
3099             {
3100                "port": "36710",
3101                "family": "ipv4",
3102                "channel-type": 4,
3103                "connection-id": 1804289383,
3104                "host": "127.0.0.1",
3105                "channel-id": 0,
3106                "tls": false
3107             },
3108             [ ... more channels follow ... ]
3109          ]
3110       }
3111    }
3112
3113 EQMP
3114
3115 #if defined(CONFIG_SPICE)
3116     {
3117         .name       = "query-spice",
3118         .args_type  = "",
3119         .mhandler.cmd_new = qmp_marshal_input_query_spice,
3120     },
3121 #endif
3122
3123 SQMP
3124 query-name
3125 ----------
3126
3127 Show VM name.
3128
3129 Return a json-object with the following information:
3130
3131 - "name": VM's name (json-string, optional)
3132
3133 Example:
3134
3135 -> { "execute": "query-name" }
3136 <- { "return": { "name": "qemu-name" } }
3137
3138 EQMP
3139
3140     {
3141         .name       = "query-name",
3142         .args_type  = "",
3143         .mhandler.cmd_new = qmp_marshal_input_query_name,
3144     },
3145
3146 SQMP
3147 query-uuid
3148 ----------
3149
3150 Show VM UUID.
3151
3152 Return a json-object with the following information:
3153
3154 - "UUID": Universally Unique Identifier (json-string)
3155
3156 Example:
3157
3158 -> { "execute": "query-uuid" }
3159 <- { "return": { "UUID": "550e8400-e29b-41d4-a716-446655440000" } }
3160
3161 EQMP
3162
3163     {
3164         .name       = "query-uuid",
3165         .args_type  = "",
3166         .mhandler.cmd_new = qmp_marshal_input_query_uuid,
3167     },
3168
3169 SQMP
3170 query-command-line-options
3171 --------------------------
3172
3173 Show command line option schema.
3174
3175 Return a json-array of command line option schema for all options (or for
3176 the given option), returning an error if the given option doesn't exist.
3177
3178 Each array entry contains the following:
3179
3180 - "option": option name (json-string)
3181 - "parameters": a json-array describes all parameters of the option:
3182     - "name": parameter name (json-string)
3183     - "type": parameter type (one of 'string', 'boolean', 'number',
3184               or 'size')
3185     - "help": human readable description of the parameter
3186               (json-string, optional)
3187     - "default": default value string for the parameter
3188                  (json-string, optional)
3189
3190 Example:
3191
3192 -> { "execute": "query-command-line-options", "arguments": { "option": "option-rom" } }
3193 <- { "return": [
3194         {
3195             "parameters": [
3196                 {
3197                     "name": "romfile",
3198                     "type": "string"
3199                 },
3200                 {
3201                     "name": "bootindex",
3202                     "type": "number"
3203                 }
3204             ],
3205             "option": "option-rom"
3206         }
3207      ]
3208    }
3209
3210 EQMP
3211
3212     {
3213         .name       = "query-command-line-options",
3214         .args_type  = "option:s?",
3215         .mhandler.cmd_new = qmp_marshal_input_query_command_line_options,
3216     },
3217
3218 SQMP
3219 query-migrate
3220 -------------
3221
3222 Migration status.
3223
3224 Return a json-object. If migration is active there will be another json-object
3225 with RAM migration status and if block migration is active another one with
3226 block migration status.
3227
3228 The main json-object contains the following:
3229
3230 - "status": migration status (json-string)
3231      - Possible values: "setup", "active", "completed", "failed", "cancelled"
3232 - "total-time": total amount of ms since migration started.  If
3233                 migration has ended, it returns the total migration
3234                 time (json-int)
3235 - "setup-time" amount of setup time in milliseconds _before_ the
3236                iterations begin but _after_ the QMP command is issued.
3237                This is designed to provide an accounting of any activities
3238                (such as RDMA pinning) which may be expensive, but do not
3239                actually occur during the iterative migration rounds
3240                themselves. (json-int)
3241 - "downtime": only present when migration has finished correctly
3242               total amount in ms for downtime that happened (json-int)
3243 - "expected-downtime": only present while migration is active
3244                 total amount in ms for downtime that was calculated on
3245                 the last bitmap round (json-int)
3246 - "ram": only present if "status" is "active", it is a json-object with the
3247   following RAM information:
3248          - "transferred": amount transferred in bytes (json-int)
3249          - "remaining": amount remaining to transfer in bytes (json-int)
3250          - "total": total amount of memory in bytes (json-int)
3251          - "duplicate": number of pages filled entirely with the same
3252             byte (json-int)
3253             These are sent over the wire much more efficiently.
3254          - "skipped": number of skipped zero pages (json-int)
3255          - "normal" : number of whole pages transferred.  I.e. they
3256             were not sent as duplicate or xbzrle pages (json-int)
3257          - "normal-bytes" : number of bytes transferred in whole
3258             pages. This is just normal pages times size of one page,
3259             but this way upper levels don't need to care about page
3260             size (json-int)
3261          - "dirty-sync-count": times that dirty ram was synchronized (json-int)
3262 - "disk": only present if "status" is "active" and it is a block migration,
3263   it is a json-object with the following disk information:
3264          - "transferred": amount transferred in bytes (json-int)
3265          - "remaining": amount remaining to transfer in bytes json-int)
3266          - "total": total disk size in bytes (json-int)
3267 - "xbzrle-cache": only present if XBZRLE is active.
3268   It is a json-object with the following XBZRLE information:
3269          - "cache-size": XBZRLE cache size in bytes
3270          - "bytes": number of bytes transferred for XBZRLE compressed pages
3271          - "pages": number of XBZRLE compressed pages
3272          - "cache-miss": number of XBRZRLE page cache misses
3273          - "cache-miss-rate": rate of XBRZRLE page cache misses
3274          - "overflow": number of times XBZRLE overflows.  This means
3275            that the XBZRLE encoding was bigger than just sent the
3276            whole page, and then we sent the whole page instead (as as
3277            normal page).
3278
3279 Examples:
3280
3281 1. Before the first migration
3282
3283 -> { "execute": "query-migrate" }
3284 <- { "return": {} }
3285
3286 2. Migration is done and has succeeded
3287
3288 -> { "execute": "query-migrate" }
3289 <- { "return": {
3290         "status": "completed",
3291         "ram":{
3292           "transferred":123,
3293           "remaining":123,
3294           "total":246,
3295           "total-time":12345,
3296           "setup-time":12345,
3297           "downtime":12345,
3298           "duplicate":123,
3299           "normal":123,
3300           "normal-bytes":123456,
3301           "dirty-sync-count":15
3302         }
3303      }
3304    }
3305
3306 3. Migration is done and has failed
3307
3308 -> { "execute": "query-migrate" }
3309 <- { "return": { "status": "failed" } }
3310
3311 4. Migration is being performed and is not a block migration:
3312
3313 -> { "execute": "query-migrate" }
3314 <- {
3315       "return":{
3316          "status":"active",
3317          "ram":{
3318             "transferred":123,
3319             "remaining":123,
3320             "total":246,
3321             "total-time":12345,
3322             "setup-time":12345,
3323             "expected-downtime":12345,
3324             "duplicate":123,
3325             "normal":123,
3326             "normal-bytes":123456,
3327             "dirty-sync-count":15
3328          }
3329       }
3330    }
3331
3332 5. Migration is being performed and is a block migration:
3333
3334 -> { "execute": "query-migrate" }
3335 <- {
3336       "return":{
3337          "status":"active",
3338          "ram":{
3339             "total":1057024,
3340             "remaining":1053304,
3341             "transferred":3720,
3342             "total-time":12345,
3343             "setup-time":12345,
3344             "expected-downtime":12345,
3345             "duplicate":123,
3346             "normal":123,
3347             "normal-bytes":123456,
3348             "dirty-sync-count":15
3349          },
3350          "disk":{
3351             "total":20971520,
3352             "remaining":20880384,
3353             "transferred":91136
3354          }
3355       }
3356    }
3357
3358 6. Migration is being performed and XBZRLE is active:
3359
3360 -> { "execute": "query-migrate" }
3361 <- {
3362       "return":{
3363          "status":"active",
3364          "capabilities" : [ { "capability": "xbzrle", "state" : true } ],
3365          "ram":{
3366             "total":1057024,
3367             "remaining":1053304,
3368             "transferred":3720,
3369             "total-time":12345,
3370             "setup-time":12345,
3371             "expected-downtime":12345,
3372             "duplicate":10,
3373             "normal":3333,
3374             "normal-bytes":3412992,
3375             "dirty-sync-count":15
3376          },
3377          "xbzrle-cache":{
3378             "cache-size":67108864,
3379             "bytes":20971520,
3380             "pages":2444343,
3381             "cache-miss":2244,
3382             "cache-miss-rate":0.123,
3383             "overflow":34434
3384          }
3385       }
3386    }
3387
3388 EQMP
3389
3390     {
3391         .name       = "query-migrate",
3392         .args_type  = "",
3393         .mhandler.cmd_new = qmp_marshal_input_query_migrate,
3394     },
3395
3396 SQMP
3397 migrate-set-capabilities
3398 ------------------------
3399
3400 Enable/Disable migration capabilities
3401
3402 - "xbzrle": XBZRLE support
3403 - "rdma-pin-all": pin all pages when using RDMA during migration
3404 - "auto-converge": throttle down guest to help convergence of migration
3405 - "zero-blocks": compress zero blocks during block migration
3406
3407 Arguments:
3408
3409 Example:
3410
3411 -> { "execute": "migrate-set-capabilities" , "arguments":
3412      { "capabilities": [ { "capability": "xbzrle", "state": true } ] } }
3413
3414 EQMP
3415
3416     {
3417         .name       = "migrate-set-capabilities",
3418         .args_type  = "capabilities:q",
3419         .params     = "capability:s,state:b",
3420         .mhandler.cmd_new = qmp_marshal_input_migrate_set_capabilities,
3421     },
3422 SQMP
3423 query-migrate-capabilities
3424 --------------------------
3425
3426 Query current migration capabilities
3427
3428 - "capabilities": migration capabilities state
3429          - "xbzrle" : XBZRLE state (json-bool)
3430          - "rdma-pin-all" : RDMA Pin Page state (json-bool)
3431          - "auto-converge" : Auto Converge state (json-bool)
3432          - "zero-blocks" : Zero Blocks state (json-bool)
3433
3434 Arguments:
3435
3436 Example:
3437
3438 -> { "execute": "query-migrate-capabilities" }
3439 <- { "return": [ { "state": false, "capability": "xbzrle" } ] }
3440
3441 EQMP
3442
3443     {
3444         .name       = "query-migrate-capabilities",
3445         .args_type  = "",
3446         .mhandler.cmd_new = qmp_marshal_input_query_migrate_capabilities,
3447     },
3448
3449 SQMP
3450 migrate-set-parameters
3451 ----------------------
3452
3453 Set migration parameters
3454
3455 - "compress-level": set compression level during migration (json-int)
3456 - "compress-threads": set compression thread count for migration (json-int)
3457 - "decompress-threads": set decompression thread count for migration (json-int)
3458
3459 Arguments:
3460
3461 Example:
3462
3463 -> { "execute": "migrate-set-parameters" , "arguments":
3464       { "compress-level": 1 } }
3465
3466 EQMP
3467
3468     {
3469         .name       = "migrate-set-parameters",
3470         .args_type  =
3471             "compress-level:i?,compress-threads:i?,decompress-threads:i?",
3472         .mhandler.cmd_new = qmp_marshal_input_migrate_set_parameters,
3473     },
3474 SQMP
3475 query-migrate-parameters
3476 ------------------------
3477
3478 Query current migration parameters
3479
3480 - "parameters": migration parameters value
3481          - "compress-level" : compression level value (json-int)
3482          - "compress-threads" : compression thread count value (json-int)
3483          - "decompress-threads" : decompression thread count value (json-int)
3484
3485 Arguments:
3486
3487 Example:
3488
3489 -> { "execute": "query-migrate-parameters" }
3490 <- {
3491       "return": {
3492          "decompress-threads", 2,
3493          "compress-threads", 8,
3494          "compress-level", 1
3495       }
3496    }
3497
3498 EQMP
3499
3500     {
3501         .name       = "query-migrate-parameters",
3502         .args_type  = "",
3503         .mhandler.cmd_new = qmp_marshal_input_query_migrate_parameters,
3504     },
3505
3506 SQMP
3507 query-balloon
3508 -------------
3509
3510 Show balloon information.
3511
3512 Make an asynchronous request for balloon info. When the request completes a
3513 json-object will be returned containing the following data:
3514
3515 - "actual": current balloon value in bytes (json-int)
3516
3517 Example:
3518
3519 -> { "execute": "query-balloon" }
3520 <- {
3521       "return":{
3522          "actual":1073741824,
3523       }
3524    }
3525
3526 EQMP
3527
3528     {
3529         .name       = "query-balloon",
3530         .args_type  = "",
3531         .mhandler.cmd_new = qmp_marshal_input_query_balloon,
3532     },
3533
3534     {
3535         .name       = "query-block-jobs",
3536         .args_type  = "",
3537         .mhandler.cmd_new = qmp_marshal_input_query_block_jobs,
3538     },
3539
3540     {
3541         .name       = "qom-list",
3542         .args_type  = "path:s",
3543         .mhandler.cmd_new = qmp_marshal_input_qom_list,
3544     },
3545
3546     {
3547         .name       = "qom-set",
3548         .args_type  = "path:s,property:s,value:q",
3549         .mhandler.cmd_new = qmp_qom_set,
3550     },
3551
3552     {
3553         .name       = "qom-get",
3554         .args_type  = "path:s,property:s",
3555         .mhandler.cmd_new = qmp_qom_get,
3556     },
3557
3558     {
3559         .name       = "nbd-server-start",
3560         .args_type  = "addr:q",
3561         .mhandler.cmd_new = qmp_marshal_input_nbd_server_start,
3562     },
3563     {
3564         .name       = "nbd-server-add",
3565         .args_type  = "device:B,writable:b?",
3566         .mhandler.cmd_new = qmp_marshal_input_nbd_server_add,
3567     },
3568     {
3569         .name       = "nbd-server-stop",
3570         .args_type  = "",
3571         .mhandler.cmd_new = qmp_marshal_input_nbd_server_stop,
3572     },
3573
3574     {
3575         .name       = "change-vnc-password",
3576         .args_type  = "password:s",
3577         .mhandler.cmd_new = qmp_marshal_input_change_vnc_password,
3578     },
3579     {
3580         .name       = "qom-list-types",
3581         .args_type  = "implements:s?,abstract:b?",
3582         .mhandler.cmd_new = qmp_marshal_input_qom_list_types,
3583     },
3584
3585     {
3586         .name       = "device-list-properties",
3587         .args_type  = "typename:s",
3588         .mhandler.cmd_new = qmp_marshal_input_device_list_properties,
3589     },
3590
3591     {
3592         .name       = "query-machines",
3593         .args_type  = "",
3594         .mhandler.cmd_new = qmp_marshal_input_query_machines,
3595     },
3596
3597     {
3598         .name       = "query-cpu-definitions",
3599         .args_type  = "",
3600         .mhandler.cmd_new = qmp_marshal_input_query_cpu_definitions,
3601     },
3602
3603     {
3604         .name       = "query-target",
3605         .args_type  = "",
3606         .mhandler.cmd_new = qmp_marshal_input_query_target,
3607     },
3608
3609     {
3610         .name       = "query-tpm",
3611         .args_type  = "",
3612         .mhandler.cmd_new = qmp_marshal_input_query_tpm,
3613     },
3614
3615 SQMP
3616 query-tpm
3617 ---------
3618
3619 Return information about the TPM device.
3620
3621 Arguments: None
3622
3623 Example:
3624
3625 -> { "execute": "query-tpm" }
3626 <- { "return":
3627      [
3628        { "model": "tpm-tis",
3629          "options":
3630            { "type": "passthrough",
3631              "data":
3632                { "cancel-path": "/sys/class/misc/tpm0/device/cancel",
3633                  "path": "/dev/tpm0"
3634                }
3635            },
3636          "id": "tpm0"
3637        }
3638      ]
3639    }
3640
3641 EQMP
3642
3643     {
3644         .name       = "query-tpm-models",
3645         .args_type  = "",
3646         .mhandler.cmd_new = qmp_marshal_input_query_tpm_models,
3647     },
3648
3649 SQMP
3650 query-tpm-models
3651 ----------------
3652
3653 Return a list of supported TPM models.
3654
3655 Arguments: None
3656
3657 Example:
3658
3659 -> { "execute": "query-tpm-models" }
3660 <- { "return": [ "tpm-tis" ] }
3661
3662 EQMP
3663
3664     {
3665         .name       = "query-tpm-types",
3666         .args_type  = "",
3667         .mhandler.cmd_new = qmp_marshal_input_query_tpm_types,
3668     },
3669
3670 SQMP
3671 query-tpm-types
3672 ---------------
3673
3674 Return a list of supported TPM types.
3675
3676 Arguments: None
3677
3678 Example:
3679
3680 -> { "execute": "query-tpm-types" }
3681 <- { "return": [ "passthrough" ] }
3682
3683 EQMP
3684
3685     {
3686         .name       = "chardev-add",
3687         .args_type  = "id:s,backend:q",
3688         .mhandler.cmd_new = qmp_marshal_input_chardev_add,
3689     },
3690
3691 SQMP
3692 chardev-add
3693 ----------------
3694
3695 Add a chardev.
3696
3697 Arguments:
3698
3699 - "id": the chardev's ID, must be unique (json-string)
3700 - "backend": chardev backend type + parameters
3701
3702 Examples:
3703
3704 -> { "execute" : "chardev-add",
3705      "arguments" : { "id" : "foo",
3706                      "backend" : { "type" : "null", "data" : {} } } }
3707 <- { "return": {} }
3708
3709 -> { "execute" : "chardev-add",
3710      "arguments" : { "id" : "bar",
3711                      "backend" : { "type" : "file",
3712                                    "data" : { "out" : "/tmp/bar.log" } } } }
3713 <- { "return": {} }
3714
3715 -> { "execute" : "chardev-add",
3716      "arguments" : { "id" : "baz",
3717                      "backend" : { "type" : "pty", "data" : {} } } }
3718 <- { "return": { "pty" : "/dev/pty/42" } }
3719
3720 EQMP
3721
3722     {
3723         .name       = "chardev-remove",
3724         .args_type  = "id:s",
3725         .mhandler.cmd_new = qmp_marshal_input_chardev_remove,
3726     },
3727
3728
3729 SQMP
3730 chardev-remove
3731 --------------
3732
3733 Remove a chardev.
3734
3735 Arguments:
3736
3737 - "id": the chardev's ID, must exist and not be in use (json-string)
3738
3739 Example:
3740
3741 -> { "execute": "chardev-remove", "arguments": { "id" : "foo" } }
3742 <- { "return": {} }
3743
3744 EQMP
3745     {
3746         .name       = "query-rx-filter",
3747         .args_type  = "name:s?",
3748         .mhandler.cmd_new = qmp_marshal_input_query_rx_filter,
3749     },
3750
3751 SQMP
3752 query-rx-filter
3753 ---------------
3754
3755 Show rx-filter information.
3756
3757 Returns a json-array of rx-filter information for all NICs (or for the
3758 given NIC), returning an error if the given NIC doesn't exist, or
3759 given NIC doesn't support rx-filter querying, or given net client
3760 isn't a NIC.
3761
3762 The query will clear the event notification flag of each NIC, then qemu
3763 will start to emit event to QMP monitor.
3764
3765 Each array entry contains the following:
3766
3767 - "name": net client name (json-string)
3768 - "promiscuous": promiscuous mode is enabled (json-bool)
3769 - "multicast": multicast receive state (one of 'normal', 'none', 'all')
3770 - "unicast": unicast receive state  (one of 'normal', 'none', 'all')
3771 - "vlan": vlan receive state (one of 'normal', 'none', 'all') (Since 2.0)
3772 - "broadcast-allowed": allow to receive broadcast (json-bool)
3773 - "multicast-overflow": multicast table is overflowed (json-bool)
3774 - "unicast-overflow": unicast table is overflowed (json-bool)
3775 - "main-mac": main macaddr string (json-string)
3776 - "vlan-table": a json-array of active vlan id
3777 - "unicast-table": a json-array of unicast macaddr string
3778 - "multicast-table": a json-array of multicast macaddr string
3779
3780 Example:
3781
3782 -> { "execute": "query-rx-filter", "arguments": { "name": "vnet0" } }
3783 <- { "return": [
3784         {
3785             "promiscuous": true,
3786             "name": "vnet0",
3787             "main-mac": "52:54:00:12:34:56",
3788             "unicast": "normal",
3789             "vlan": "normal",
3790             "vlan-table": [
3791                 4,
3792                 0
3793             ],
3794             "unicast-table": [
3795             ],
3796             "multicast": "normal",
3797             "multicast-overflow": false,
3798             "unicast-overflow": false,
3799             "multicast-table": [
3800                 "01:00:5e:00:00:01",
3801                 "33:33:00:00:00:01",
3802                 "33:33:ff:12:34:56"
3803             ],
3804             "broadcast-allowed": false
3805         }
3806       ]
3807    }
3808
3809 EQMP
3810
3811     {
3812         .name       = "blockdev-add",
3813         .args_type  = "options:q",
3814         .mhandler.cmd_new = qmp_marshal_input_blockdev_add,
3815     },
3816
3817 SQMP
3818 blockdev-add
3819 ------------
3820
3821 Add a block device.
3822
3823 This command is still a work in progress.  It doesn't support all
3824 block drivers, it lacks a matching blockdev-del, and more.  Stay away
3825 from it unless you want to help with its development.
3826
3827 Arguments:
3828
3829 - "options": block driver options
3830
3831 Example (1):
3832
3833 -> { "execute": "blockdev-add",
3834     "arguments": { "options" : { "driver": "qcow2",
3835                                  "file": { "driver": "file",
3836                                            "filename": "test.qcow2" } } } }
3837 <- { "return": {} }
3838
3839 Example (2):
3840
3841 -> { "execute": "blockdev-add",
3842      "arguments": {
3843          "options": {
3844            "driver": "qcow2",
3845            "id": "my_disk",
3846            "discard": "unmap",
3847            "cache": {
3848                "direct": true,
3849                "writeback": true
3850            },
3851            "file": {
3852                "driver": "file",
3853                "filename": "/tmp/test.qcow2"
3854            },
3855            "backing": {
3856                "driver": "raw",
3857                "file": {
3858                    "driver": "file",
3859                    "filename": "/dev/fdset/4"
3860                }
3861            }
3862          }
3863        }
3864      }
3865
3866 <- { "return": {} }
3867
3868 EQMP
3869
3870     {
3871         .name       = "query-named-block-nodes",
3872         .args_type  = "",
3873         .mhandler.cmd_new = qmp_marshal_input_query_named_block_nodes,
3874     },
3875
3876 SQMP
3877 @query-named-block-nodes
3878 ------------------------
3879
3880 Return a list of BlockDeviceInfo for all the named block driver nodes
3881
3882 Example:
3883
3884 -> { "execute": "query-named-block-nodes" }
3885 <- { "return": [ { "ro":false,
3886                    "drv":"qcow2",
3887                    "encrypted":false,
3888                    "file":"disks/test.qcow2",
3889                    "node-name": "my-node",
3890                    "backing_file_depth":1,
3891                    "bps":1000000,
3892                    "bps_rd":0,
3893                    "bps_wr":0,
3894                    "iops":1000000,
3895                    "iops_rd":0,
3896                    "iops_wr":0,
3897                    "bps_max": 8000000,
3898                    "bps_rd_max": 0,
3899                    "bps_wr_max": 0,
3900                    "iops_max": 0,
3901                    "iops_rd_max": 0,
3902                    "iops_wr_max": 0,
3903                    "iops_size": 0,
3904                    "write_threshold": 0,
3905                    "image":{
3906                       "filename":"disks/test.qcow2",
3907                       "format":"qcow2",
3908                       "virtual-size":2048000,
3909                       "backing_file":"base.qcow2",
3910                       "full-backing-filename":"disks/base.qcow2",
3911                       "backing-filename-format":"qcow2",
3912                       "snapshots":[
3913                          {
3914                             "id": "1",
3915                             "name": "snapshot1",
3916                             "vm-state-size": 0,
3917                             "date-sec": 10000200,
3918                             "date-nsec": 12,
3919                             "vm-clock-sec": 206,
3920                             "vm-clock-nsec": 30
3921                          }
3922                       ],
3923                       "backing-image":{
3924                           "filename":"disks/base.qcow2",
3925                           "format":"qcow2",
3926                           "virtual-size":2048000
3927                       }
3928                    } } ] }
3929
3930 EQMP
3931
3932     {
3933         .name       = "query-memdev",
3934         .args_type  = "",
3935         .mhandler.cmd_new = qmp_marshal_input_query_memdev,
3936     },
3937
3938 SQMP
3939 query-memdev
3940 ------------
3941
3942 Show memory devices information.
3943
3944
3945 Example (1):
3946
3947 -> { "execute": "query-memdev" }
3948 <- { "return": [
3949        {
3950          "size": 536870912,
3951          "merge": false,
3952          "dump": true,
3953          "prealloc": false,
3954          "host-nodes": [0, 1],
3955          "policy": "bind"
3956        },
3957        {
3958          "size": 536870912,
3959          "merge": false,
3960          "dump": true,
3961          "prealloc": true,
3962          "host-nodes": [2, 3],
3963          "policy": "preferred"
3964        }
3965      ]
3966    }
3967
3968 EQMP
3969
3970     {
3971         .name       = "query-memory-devices",
3972         .args_type  = "",
3973         .mhandler.cmd_new = qmp_marshal_input_query_memory_devices,
3974     },
3975
3976 SQMP
3977 @query-memory-devices
3978 --------------------
3979
3980 Return a list of memory devices.
3981
3982 Example:
3983 -> { "execute": "query-memory-devices" }
3984 <- { "return": [ { "data":
3985                       { "addr": 5368709120,
3986                         "hotpluggable": true,
3987                         "hotplugged": true,
3988                         "id": "d1",
3989                         "memdev": "/objects/memX",
3990                         "node": 0,
3991                         "size": 1073741824,
3992                         "slot": 0},
3993                    "type": "dimm"
3994                  } ] }
3995 EQMP
3996
3997     {
3998         .name       = "query-acpi-ospm-status",
3999         .args_type  = "",
4000         .mhandler.cmd_new = qmp_marshal_input_query_acpi_ospm_status,
4001     },
4002
4003 SQMP
4004 @query-acpi-ospm-status
4005 --------------------
4006
4007 Return list of ACPIOSTInfo for devices that support status reporting
4008 via ACPI _OST method.
4009
4010 Example:
4011 -> { "execute": "query-acpi-ospm-status" }
4012 <- { "return": [ { "device": "d1", "slot": "0", "slot-type": "DIMM", "source": 1, "status": 0},
4013                  { "slot": "1", "slot-type": "DIMM", "source": 0, "status": 0},
4014                  { "slot": "2", "slot-type": "DIMM", "source": 0, "status": 0},
4015                  { "slot": "3", "slot-type": "DIMM", "source": 0, "status": 0}
4016    ]}
4017 EQMP
4018
4019 #if defined TARGET_I386
4020     {
4021         .name       = "rtc-reset-reinjection",
4022         .args_type  = "",
4023         .mhandler.cmd_new = qmp_marshal_input_rtc_reset_reinjection,
4024     },
4025 #endif
4026
4027 SQMP
4028 rtc-reset-reinjection
4029 ---------------------
4030
4031 Reset the RTC interrupt reinjection backlog.
4032
4033 Arguments: None.
4034
4035 Example:
4036
4037 -> { "execute": "rtc-reset-reinjection" }
4038 <- { "return": {} }
4039 EQMP
4040
4041     {
4042         .name       = "trace-event-get-state",
4043         .args_type  = "name:s",
4044         .mhandler.cmd_new = qmp_marshal_input_trace_event_get_state,
4045     },
4046
4047 SQMP
4048 trace-event-get-state
4049 ---------------------
4050
4051 Query the state of events.
4052
4053 Example:
4054
4055 -> { "execute": "trace-event-get-state", "arguments": { "name": "qemu_memalign" } }
4056 <- { "return": [ { "name": "qemu_memalign", "state": "disabled" } ] }
4057 EQMP
4058
4059     {
4060         .name       = "trace-event-set-state",
4061         .args_type  = "name:s,enable:b,ignore-unavailable:b?",
4062         .mhandler.cmd_new = qmp_marshal_input_trace_event_set_state,
4063     },
4064
4065 SQMP
4066 trace-event-set-state
4067 ---------------------
4068
4069 Set the state of events.
4070
4071 Example:
4072
4073 -> { "execute": "trace-event-set-state", "arguments": { "name": "qemu_memalign", "enable": "true" } }
4074 <- { "return": {} }
4075 EQMP
4076
4077     {
4078         .name       = "x-input-send-event",
4079         .args_type  = "console:i?,events:q",
4080         .mhandler.cmd_new = qmp_marshal_input_x_input_send_event,
4081     },
4082
4083 SQMP
4084 @x-input-send-event
4085 -----------------
4086
4087 Send input event to guest.
4088
4089 Arguments:
4090
4091 - "console": console index. (json-int, optional)
4092 - "events": list of input events.
4093
4094 The consoles are visible in the qom tree, under
4095 /backend/console[$index]. They have a device link and head property, so
4096 it is possible to map which console belongs to which device and display.
4097
4098 Note: this command is experimental, and not a stable API.
4099
4100 Example (1):
4101
4102 Press left mouse button.
4103
4104 -> { "execute": "x-input-send-event",
4105     "arguments": { "console": 0,
4106                    "events": [ { "type": "btn",
4107                     "data" : { "down": true, "button": "Left" } } ] } }
4108 <- { "return": {} }
4109
4110 -> { "execute": "x-input-send-event",
4111     "arguments": { "console": 0,
4112                    "events": [ { "type": "btn",
4113                     "data" : { "down": false, "button": "Left" } } ] } }
4114 <- { "return": {} }
4115
4116 Example (2):
4117
4118 Press ctrl-alt-del.
4119
4120 -> { "execute": "x-input-send-event",
4121      "arguments": { "console": 0, "events": [
4122         { "type": "key", "data" : { "down": true,
4123           "key": {"type": "qcode", "data": "ctrl" } } },
4124         { "type": "key", "data" : { "down": true,
4125           "key": {"type": "qcode", "data": "alt" } } },
4126         { "type": "key", "data" : { "down": true,
4127           "key": {"type": "qcode", "data": "delete" } } } ] } }
4128 <- { "return": {} }
4129
4130 Example (3):
4131
4132 Move mouse pointer to absolute coordinates (20000, 400).
4133
4134 -> { "execute": "x-input-send-event" ,
4135   "arguments": { "console": 0, "events": [
4136                { "type": "abs", "data" : { "axis": "X", "value" : 20000 } },
4137                { "type": "abs", "data" : { "axis": "Y", "value" : 400 } } ] } }
4138 <- { "return": {} }
4139
4140 EQMP
4141
4142     {
4143         .name       = "block-set-write-threshold",
4144         .args_type  = "node-name:s,write-threshold:l",
4145         .mhandler.cmd_new = qmp_marshal_input_block_set_write_threshold,
4146     },
4147
4148 SQMP
4149 block-set-write-threshold
4150 ------------
4151
4152 Change the write threshold for a block drive. The threshold is an offset,
4153 thus must be non-negative. Default is no write threshold.
4154 Setting the threshold to zero disables it.
4155
4156 Arguments:
4157
4158 - "node-name": the node name in the block driver state graph (json-string)
4159 - "write-threshold": the write threshold in bytes (json-int)
4160
4161 Example:
4162
4163 -> { "execute": "block-set-write-threshold",
4164   "arguments": { "node-name": "mydev",
4165                  "write-threshold": 17179869184 } }
4166 <- { "return": {} }
4167
4168 EQMP