qapi/char.json

   1 # -*- Mode: Python -*-
   2 # vim: filetype=python
   3 #
   4
   5 ##
   6 # = Character devices
   7 ##
   8
   9 { 'include': 'sockets.json' }
  10
  11 ##
  12 # @ChardevInfo:
  13 #
  14 # Information about a character device.
  15 #
  16 # @label: the label of the character device
  17 #
  18 # @filename: the filename of the character device
  19 #
  20 # @frontend-open: shows whether the frontend device attached to this
  21 #     backend (e.g. with the chardev=... option) is in open or closed
  22 #     state (since 2.1)
  23 #
  24 # Notes: @filename is encoded using the QEMU command line character
  25 #     device encoding.  See the QEMU man page for details.
  26 #
  27 # Since: 0.14
  28 ##
  29 { 'struct': 'ChardevInfo',
  30   'data': { 'label': 'str',
  31             'filename': 'str',
  32             'frontend-open': 'bool' } }
  33
  34 ##
  35 # @query-chardev:
  36 #
  37 # Returns information about current character devices.
  38 #
  39 # Returns: a list of @ChardevInfo
  40 #
  41 # Since: 0.14
  42 #
  43 # Example:
  44 #
  45 #     -> { "execute": "query-chardev" }
  46 #     <- {
  47 #           "return": [
  48 #              {
  49 #                 "label": "charchannel0",
  50 #                 "filename": "unix:/var/lib/libvirt/qemu/seabios.rhel6.agent,server=on",
  51 #                 "frontend-open": false
  52 #              },
  53 #              {
  54 #                 "label": "charmonitor",
  55 #                 "filename": "unix:/var/lib/libvirt/qemu/seabios.rhel6.monitor,server=on",
  56 #                 "frontend-open": true
  57 #              },
  58 #              {
  59 #                 "label": "charserial0",
  60 #                 "filename": "pty:/dev/pts/2",
  61 #                 "frontend-open": true
  62 #              }
  63 #           ]
  64 #        }
  65 ##
  66 { 'command': 'query-chardev', 'returns': ['ChardevInfo'],
  67   'allow-preconfig': true }
  68
  69 ##
  70 # @ChardevBackendInfo:
  71 #
  72 # Information about a character device backend
  73 #
  74 # @name: The backend name
  75 #
  76 # Since: 2.0
  77 ##
  78 { 'struct': 'ChardevBackendInfo', 'data': {'name': 'str'} }
  79
  80 ##
  81 # @query-chardev-backends:
  82 #
  83 # Returns information about character device backends.
  84 #
  85 # Returns: a list of @ChardevBackendInfo
  86 #
  87 # Since: 2.0
  88 #
  89 # Example:
  90 #
  91 #     -> { "execute": "query-chardev-backends" }
  92 #     <- {
  93 #           "return":[
  94 #              {
  95 #                 "name":"udp"
  96 #              },
  97 #              {
  98 #                 "name":"tcp"
  99 #              },
 100 #              {
 101 #                 "name":"unix"
 102 #              },
 103 #              {
 104 #                 "name":"spiceport"
 105 #              }
 106 #           ]
 107 #        }
 108 ##
 109 { 'command': 'query-chardev-backends', 'returns': ['ChardevBackendInfo'] }
 110
 111 ##
 112 # @DataFormat:
 113 #
 114 # An enumeration of data format.
 115 #
 116 # @utf8: Data is a UTF-8 string (RFC 3629)
 117 #
 118 # @base64: Data is Base64 encoded binary (RFC 3548)
 119 #
 120 # Since: 1.4
 121 ##
 122 { 'enum': 'DataFormat',
 123   'data': [ 'utf8', 'base64' ] }
 124
 125 ##
 126 # @ringbuf-write:
 127 #
 128 # Write to a ring buffer character device.
 129 #
 130 # @device: the ring buffer character device name
 131 #
 132 # @data: data to write
 133 #
 134 # @format: data encoding (default 'utf8').
 135 #
 136 #     - base64: data must be base64 encoded text.  Its binary decoding
 137 #       gets written.
 138 #     - utf8: data's UTF-8 encoding is written
 139 #     - data itself is always Unicode regardless of format, like any
 140 #       other string.
 141 #
 142 # Since: 1.4
 143 #
 144 # Example:
 145 #
 146 #     -> { "execute": "ringbuf-write",
 147 #          "arguments": { "device": "foo",
 148 #                         "data": "abcdefgh",
 149 #                         "format": "utf8" } }
 150 #     <- { "return": {} }
 151 ##
 152 { 'command': 'ringbuf-write',
 153   'data': { 'device': 'str',
 154             'data': 'str',
 155            '*format': 'DataFormat'} }
 156
 157 ##
 158 # @ringbuf-read:
 159 #
 160 # Read from a ring buffer character device.
 161 #
 162 # @device: the ring buffer character device name
 163 #
 164 # @size: how many bytes to read at most
 165 #
 166 # @format: data encoding (default 'utf8').
 167 #
 168 #     - base64: the data read is returned in base64 encoding.
 169 #     - utf8: the data read is interpreted as UTF-8.
 170 #       Bug: can screw up when the buffer contains invalid UTF-8
 171 #       sequences, NUL characters, after the ring buffer lost data,
 172 #       and when reading stops because the size limit is reached.
 173 #     - The return value is always Unicode regardless of format, like
 174 #       any other string.
 175 #
 176 # Returns: data read from the device
 177 #
 178 # Since: 1.4
 179 #
 180 # Example:
 181 #
 182 #     -> { "execute": "ringbuf-read",
 183 #          "arguments": { "device": "foo",
 184 #                         "size": 1000,
 185 #                         "format": "utf8" } }
 186 #     <- { "return": "abcdefgh" }
 187 ##
 188 { 'command': 'ringbuf-read',
 189   'data': {'device': 'str', 'size': 'int', '*format': 'DataFormat'},
 190   'returns': 'str' }
 191
 192 ##
 193 # @ChardevCommon:
 194 #
 195 # Configuration shared across all chardev backends
 196 #
 197 # @logfile: The name of a logfile to save output
 198 #
 199 # @logappend: true to append instead of truncate (default to false to
 200 #     truncate)
 201 #
 202 # Since: 2.6
 203 ##
 204 { 'struct': 'ChardevCommon',
 205   'data': { '*logfile': 'str',
 206             '*logappend': 'bool' } }
 207
 208 ##
 209 # @ChardevFile:
 210 #
 211 # Configuration info for file chardevs.
 212 #
 213 # @in: The name of the input file
 214 #
 215 # @out: The name of the output file
 216 #
 217 # @append: Open the file in append mode (default false to truncate)
 218 #     (Since 2.6)
 219 #
 220 # Since: 1.4
 221 ##
 222 { 'struct': 'ChardevFile',
 223   'data': { '*in': 'str',
 224             'out': 'str',
 225             '*append': 'bool' },
 226   'base': 'ChardevCommon' }
 227
 228 ##
 229 # @ChardevHostdev:
 230 #
 231 # Configuration info for device and pipe chardevs.
 232 #
 233 # @device: The name of the special file for the device, i.e.
 234 #     /dev/ttyS0 on Unix or COM1: on Windows
 235 #
 236 # Since: 1.4
 237 ##
 238 { 'struct': 'ChardevHostdev',
 239   'data': { 'device': 'str' },
 240   'base': 'ChardevCommon' }
 241
 242 ##
 243 # @ChardevSocket:
 244 #
 245 # Configuration info for (stream) socket chardevs.
 246 #
 247 # @addr: socket address to listen on (server=true) or connect to
 248 #     (server=false)
 249 #
 250 # @tls-creds: the ID of the TLS credentials object (since 2.6)
 251 #
 252 # @tls-authz: the ID of the QAuthZ authorization object against which
 253 #     the client's x509 distinguished name will be validated.  This
 254 #     object is only resolved at time of use, so can be deleted and
 255 #     recreated on the fly while the chardev server is active.  If
 256 #     missing, it will default to denying access (since 4.0)
 257 #
 258 # @server: create server socket (default: true)
 259 #
 260 # @wait: wait for incoming connection on server sockets (default:
 261 #     false). Silently ignored with server: false.  This use is
 262 #     deprecated.
 263 #
 264 # @nodelay: set TCP_NODELAY socket option (default: false)
 265 #
 266 # @telnet: enable telnet protocol on server sockets (default: false)
 267 #
 268 # @tn3270: enable tn3270 protocol on server sockets (default: false)
 269 #     (Since: 2.10)
 270 #
 271 # @websocket: enable websocket protocol on server sockets
 272 #     (default: false) (Since: 3.1)
 273 #
 274 # @reconnect: For a client socket, if a socket is disconnected, then
 275 #     attempt a reconnect after the given number of seconds.  Setting
 276 #     this to zero disables this function.  (default: 0) (Since: 2.2)
 277 #
 278 # Since: 1.4
 279 ##
 280 { 'struct': 'ChardevSocket',
 281   'data': { 'addr': 'SocketAddressLegacy',
 282             '*tls-creds': 'str',
 283             '*tls-authz'  : 'str',
 284             '*server': 'bool',
 285             '*wait': 'bool',
 286             '*nodelay': 'bool',
 287             '*telnet': 'bool',
 288             '*tn3270': 'bool',
 289             '*websocket': 'bool',
 290             '*reconnect': 'int' },
 291   'base': 'ChardevCommon' }
 292
 293 ##
 294 # @ChardevUdp:
 295 #
 296 # Configuration info for datagram socket chardevs.
 297 #
 298 # @remote: remote address
 299 #
 300 # @local: local address
 301 #
 302 # Since: 1.5
 303 ##
 304 { 'struct': 'ChardevUdp',
 305   'data': { 'remote': 'SocketAddressLegacy',
 306             '*local': 'SocketAddressLegacy' },
 307   'base': 'ChardevCommon' }
 308
 309 ##
 310 # @ChardevMux:
 311 #
 312 # Configuration info for mux chardevs.
 313 #
 314 # @chardev: name of the base chardev.
 315 #
 316 # Since: 1.5
 317 ##
 318 { 'struct': 'ChardevMux',
 319   'data': { 'chardev': 'str' },
 320   'base': 'ChardevCommon' }
 321
 322 ##
 323 # @ChardevStdio:
 324 #
 325 # Configuration info for stdio chardevs.
 326 #
 327 # @signal: Allow signals (such as SIGINT triggered by ^C) be delivered
 328 #     to qemu.  Default: true.
 329 #
 330 # Since: 1.5
 331 ##
 332 { 'struct': 'ChardevStdio',
 333   'data': { '*signal': 'bool' },
 334   'base': 'ChardevCommon' }
 335
 336 ##
 337 # @ChardevSpiceChannel:
 338 #
 339 # Configuration info for spice vm channel chardevs.
 340 #
 341 # @type: kind of channel (for example vdagent).
 342 #
 343 # Since: 1.5
 344 ##
 345 { 'struct': 'ChardevSpiceChannel',
 346   'data': { 'type': 'str' },
 347   'base': 'ChardevCommon',
 348   'if': 'CONFIG_SPICE' }
 349
 350 ##
 351 # @ChardevSpicePort:
 352 #
 353 # Configuration info for spice port chardevs.
 354 #
 355 # @fqdn: name of the channel (see docs/spice-port-fqdn.txt)
 356 #
 357 # Since: 1.5
 358 ##
 359 { 'struct': 'ChardevSpicePort',
 360   'data': { 'fqdn': 'str' },
 361   'base': 'ChardevCommon',
 362   'if': 'CONFIG_SPICE' }
 363
 364 ##
 365 # @ChardevDBus:
 366 #
 367 # Configuration info for DBus chardevs.
 368 #
 369 # @name: name of the channel (following docs/spice-port-fqdn.txt)
 370 #
 371 # Since: 7.0
 372 ##
 373 { 'struct': 'ChardevDBus',
 374   'data': { 'name': 'str' },
 375   'base': 'ChardevCommon',
 376   'if': 'CONFIG_DBUS_DISPLAY' }
 377
 378 ##
 379 # @ChardevVC:
 380 #
 381 # Configuration info for virtual console chardevs.
 382 #
 383 # @width: console width, in pixels
 384 #
 385 # @height: console height, in pixels
 386 #
 387 # @cols: console width, in chars
 388 #
 389 # @rows: console height, in chars
 390 #
 391 # Note: the options are only effective when the VNC or SDL graphical
 392 #     display backend is active.  They are ignored with the GTK,
 393 #     Spice, VNC and D-Bus display backends.
 394 #
 395 # Since: 1.5
 396 ##
 397 { 'struct': 'ChardevVC',
 398   'data': { '*width': 'int',
 399             '*height': 'int',
 400             '*cols': 'int',
 401             '*rows': 'int' },
 402   'base': 'ChardevCommon' }
 403
 404 ##
 405 # @ChardevRingbuf:
 406 #
 407 # Configuration info for ring buffer chardevs.
 408 #
 409 # @size: ring buffer size, must be power of two, default is 65536
 410 #
 411 # Since: 1.5
 412 ##
 413 { 'struct': 'ChardevRingbuf',
 414   'data': { '*size': 'int' },
 415   'base': 'ChardevCommon' }
 416
 417 ##
 418 # @ChardevQemuVDAgent:
 419 #
 420 # Configuration info for qemu vdagent implementation.
 421 #
 422 # @mouse: enable/disable mouse, default is enabled.
 423 #
 424 # @clipboard: enable/disable clipboard, default is disabled.
 425 #
 426 # Since: 6.1
 427 ##
 428 { 'struct': 'ChardevQemuVDAgent',
 429   'data': { '*mouse': 'bool',
 430             '*clipboard': 'bool' },
 431   'base': 'ChardevCommon',
 432   'if': 'CONFIG_SPICE_PROTOCOL' }
 433
 434 ##
 435 # @ChardevBackendKind:
 436 #
 437 # @pipe: Since 1.5
 438 #
 439 # @udp: Since 1.5
 440 #
 441 # @mux: Since 1.5
 442 #
 443 # @msmouse: Since 1.5
 444 #
 445 # @wctablet: Since 2.9
 446 #
 447 # @braille: Since 1.5
 448 #
 449 # @testdev: Since 2.2
 450 #
 451 # @stdio: Since 1.5
 452 #
 453 # @console: Since 1.5
 454 #
 455 # @spicevmc: Since 1.5
 456 #
 457 # @spiceport: Since 1.5
 458 #
 459 # @qemu-vdagent: Since 6.1
 460 #
 461 # @dbus: Since 7.0
 462 #
 463 # @vc: v1.5
 464 #
 465 # @ringbuf: Since 1.6
 466 #
 467 # @memory: Since 1.5
 468 #
 469 # Features:
 470 #
 471 # @deprecated: Member @memory is deprecated.  Use @ringbuf instead.
 472 #
 473 # Since: 1.4
 474 ##
 475 { 'enum': 'ChardevBackendKind',
 476   'data': [ 'file',
 477             { 'name': 'serial', 'if': 'HAVE_CHARDEV_SERIAL' },
 478             { 'name': 'parallel', 'if': 'HAVE_CHARDEV_PARALLEL' },
 479             'pipe',
 480             'socket',
 481             'udp',
 482             'pty',
 483             'null',
 484             'mux',
 485             'msmouse',
 486             'wctablet',
 487             { 'name': 'braille', 'if': 'CONFIG_BRLAPI' },
 488             'testdev',
 489             'stdio',
 490             { 'name': 'console', 'if': 'CONFIG_WIN32' },
 491             { 'name': 'spicevmc', 'if': 'CONFIG_SPICE' },
 492             { 'name': 'spiceport', 'if': 'CONFIG_SPICE' },
 493             { 'name': 'qemu-vdagent', 'if': 'CONFIG_SPICE_PROTOCOL' },
 494             { 'name': 'dbus', 'if': 'CONFIG_DBUS_DISPLAY' },
 495             'vc',
 496             'ringbuf',
 497             { 'name': 'memory', 'features': [ 'deprecated' ] } ] }
 498
 499 ##
 500 # @ChardevFileWrapper:
 501 #
 502 # @data: Configuration info for file chardevs
 503 #
 504 # Since: 1.4
 505 ##
 506 { 'struct': 'ChardevFileWrapper',
 507   'data': { 'data': 'ChardevFile' } }
 508
 509 ##
 510 # @ChardevHostdevWrapper:
 511 #
 512 # @data: Configuration info for device and pipe chardevs
 513 #
 514 # Since: 1.4
 515 ##
 516 { 'struct': 'ChardevHostdevWrapper',
 517   'data': { 'data': 'ChardevHostdev' } }
 518
 519 ##
 520 # @ChardevSocketWrapper:
 521 #
 522 # @data: Configuration info for (stream) socket chardevs
 523 #
 524 # Since: 1.4
 525 ##
 526 { 'struct': 'ChardevSocketWrapper',
 527   'data': { 'data': 'ChardevSocket' } }
 528
 529 ##
 530 # @ChardevUdpWrapper:
 531 #
 532 # @data: Configuration info for datagram socket chardevs
 533 #
 534 # Since: 1.5
 535 ##
 536 { 'struct': 'ChardevUdpWrapper',
 537   'data': { 'data': 'ChardevUdp' } }
 538
 539 ##
 540 # @ChardevCommonWrapper:
 541 #
 542 # @data: Configuration shared across all chardev backends
 543 #
 544 # Since: 2.6
 545 ##
 546 { 'struct': 'ChardevCommonWrapper',
 547   'data': { 'data': 'ChardevCommon' } }
 548
 549 ##
 550 # @ChardevMuxWrapper:
 551 #
 552 # @data: Configuration info for mux chardevs
 553 #
 554 # Since: 1.5
 555 ##
 556 { 'struct': 'ChardevMuxWrapper',
 557   'data': { 'data': 'ChardevMux' } }
 558
 559 ##
 560 # @ChardevStdioWrapper:
 561 #
 562 # @data: Configuration info for stdio chardevs
 563 #
 564 # Since: 1.5
 565 ##
 566 { 'struct': 'ChardevStdioWrapper',
 567   'data': { 'data': 'ChardevStdio' } }
 568
 569 ##
 570 # @ChardevSpiceChannelWrapper:
 571 #
 572 # @data: Configuration info for spice vm channel chardevs
 573 #
 574 # Since: 1.5
 575 ##
 576 { 'struct': 'ChardevSpiceChannelWrapper',
 577   'data': { 'data': 'ChardevSpiceChannel' },
 578   'if': 'CONFIG_SPICE' }
 579
 580 ##
 581 # @ChardevSpicePortWrapper:
 582 #
 583 # @data: Configuration info for spice port chardevs
 584 #
 585 # Since: 1.5
 586 ##
 587 { 'struct': 'ChardevSpicePortWrapper',
 588   'data': { 'data': 'ChardevSpicePort' },
 589   'if': 'CONFIG_SPICE' }
 590
 591 ##
 592 # @ChardevQemuVDAgentWrapper:
 593 #
 594 # @data: Configuration info for qemu vdagent implementation
 595 #
 596 # Since: 6.1
 597 ##
 598 { 'struct': 'ChardevQemuVDAgentWrapper',
 599   'data': { 'data': 'ChardevQemuVDAgent' },
 600   'if': 'CONFIG_SPICE_PROTOCOL' }
 601
 602 ##
 603 # @ChardevDBusWrapper:
 604 #
 605 # @data: Configuration info for DBus chardevs
 606 #
 607 # Since: 7.0
 608 ##
 609 { 'struct': 'ChardevDBusWrapper',
 610   'data': { 'data': 'ChardevDBus' },
 611   'if': 'CONFIG_DBUS_DISPLAY' }
 612
 613 ##
 614 # @ChardevVCWrapper:
 615 #
 616 # @data: Configuration info for virtual console chardevs
 617 #
 618 # Since: 1.5
 619 ##
 620 { 'struct': 'ChardevVCWrapper',
 621   'data': { 'data': 'ChardevVC' } }
 622
 623 ##
 624 # @ChardevRingbufWrapper:
 625 #
 626 # @data: Configuration info for ring buffer chardevs
 627 #
 628 # Since: 1.5
 629 ##
 630 { 'struct': 'ChardevRingbufWrapper',
 631   'data': { 'data': 'ChardevRingbuf' } }
 632
 633 ##
 634 # @ChardevBackend:
 635 #
 636 # Configuration info for the new chardev backend.
 637 #
 638 # @type: backend type
 639 #
 640 # Since: 1.4
 641 ##
 642 { 'union': 'ChardevBackend',
 643   'base': { 'type': 'ChardevBackendKind' },
 644   'discriminator': 'type',
 645   'data': { 'file': 'ChardevFileWrapper',
 646             'serial': { 'type': 'ChardevHostdevWrapper',
 647                         'if': 'HAVE_CHARDEV_SERIAL' },
 648             'parallel': { 'type': 'ChardevHostdevWrapper',
 649                           'if': 'HAVE_CHARDEV_PARALLEL' },
 650             'pipe': 'ChardevHostdevWrapper',
 651             'socket': 'ChardevSocketWrapper',
 652             'udp': 'ChardevUdpWrapper',
 653             'pty': 'ChardevCommonWrapper',
 654             'null': 'ChardevCommonWrapper',
 655             'mux': 'ChardevMuxWrapper',
 656             'msmouse': 'ChardevCommonWrapper',
 657             'wctablet': 'ChardevCommonWrapper',
 658             'braille': { 'type': 'ChardevCommonWrapper',
 659                          'if': 'CONFIG_BRLAPI' },
 660             'testdev': 'ChardevCommonWrapper',
 661             'stdio': 'ChardevStdioWrapper',
 662             'console': { 'type': 'ChardevCommonWrapper',
 663                          'if': 'CONFIG_WIN32' },
 664             'spicevmc': { 'type': 'ChardevSpiceChannelWrapper',
 665                           'if': 'CONFIG_SPICE' },
 666             'spiceport': { 'type': 'ChardevSpicePortWrapper',
 667                            'if': 'CONFIG_SPICE' },
 668             'qemu-vdagent': { 'type': 'ChardevQemuVDAgentWrapper',
 669                               'if': 'CONFIG_SPICE_PROTOCOL' },
 670             'dbus': { 'type': 'ChardevDBusWrapper',
 671                       'if': 'CONFIG_DBUS_DISPLAY' },
 672             'vc': 'ChardevVCWrapper',
 673             'ringbuf': 'ChardevRingbufWrapper',
 674             'memory': 'ChardevRingbufWrapper' } }
 675
 676 ##
 677 # @ChardevReturn:
 678 #
 679 # Return info about the chardev backend just created.
 680 #
 681 # @pty: name of the slave pseudoterminal device, present if and only
 682 #     if a chardev of type 'pty' was created
 683 #
 684 # Since: 1.4
 685 ##
 686 { 'struct' : 'ChardevReturn',
 687   'data': { '*pty': 'str' } }
 688
 689 ##
 690 # @chardev-add:
 691 #
 692 # Add a character device backend
 693 #
 694 # @id: the chardev's ID, must be unique
 695 #
 696 # @backend: backend type and parameters
 697 #
 698 # Returns: ChardevReturn.
 699 #
 700 # Since: 1.4
 701 #
 702 # Examples:
 703 #
 704 #     -> { "execute" : "chardev-add",
 705 #          "arguments" : { "id" : "foo",
 706 #                          "backend" : { "type" : "null", "data" : {} } } }
 707 #     <- { "return": {} }
 708 #
 709 #     -> { "execute" : "chardev-add",
 710 #          "arguments" : { "id" : "bar",
 711 #                          "backend" : { "type" : "file",
 712 #                                        "data" : { "out" : "/tmp/bar.log" } } } }
 713 #     <- { "return": {} }
 714 #
 715 #     -> { "execute" : "chardev-add",
 716 #          "arguments" : { "id" : "baz",
 717 #                          "backend" : { "type" : "pty", "data" : {} } } }
 718 #     <- { "return": { "pty" : "/dev/pty/42" } }
 719 ##
 720 { 'command': 'chardev-add',
 721   'data': { 'id': 'str',
 722             'backend': 'ChardevBackend' },
 723   'returns': 'ChardevReturn' }
 724
 725 ##
 726 # @chardev-change:
 727 #
 728 # Change a character device backend
 729 #
 730 # @id: the chardev's ID, must exist
 731 #
 732 # @backend: new backend type and parameters
 733 #
 734 # Returns: ChardevReturn.
 735 #
 736 # Since: 2.10
 737 #
 738 # Examples:
 739 #
 740 #     -> { "execute" : "chardev-change",
 741 #          "arguments" : { "id" : "baz",
 742 #                          "backend" : { "type" : "pty", "data" : {} } } }
 743 #     <- { "return": { "pty" : "/dev/pty/42" } }
 744 #
 745 #     -> {"execute" : "chardev-change",
 746 #         "arguments" : {
 747 #             "id" : "charchannel2",
 748 #             "backend" : {
 749 #                 "type" : "socket",
 750 #                 "data" : {
 751 #                     "addr" : {
 752 #                         "type" : "unix" ,
 753 #                         "data" : {
 754 #                             "path" : "/tmp/charchannel2.socket"
 755 #                         }
 756 #                      },
 757 #                      "server" : true,
 758 #                      "wait" : false }}}}
 759 #     <- {"return": {}}
 760 ##
 761 { 'command': 'chardev-change',
 762   'data': { 'id': 'str',
 763             'backend': 'ChardevBackend' },
 764   'returns': 'ChardevReturn' }
 765
 766 ##
 767 # @chardev-remove:
 768 #
 769 # Remove a character device backend
 770 #
 771 # @id: the chardev's ID, must exist and not be in use
 772 #
 773 # Since: 1.4
 774 #
 775 # Example:
 776 #
 777 #     -> { "execute": "chardev-remove", "arguments": { "id" : "foo" } }
 778 #     <- { "return": {} }
 779 ##
 780 { 'command': 'chardev-remove',
 781   'data': { 'id': 'str' } }
 782
 783 ##
 784 # @chardev-send-break:
 785 #
 786 # Send a break to a character device
 787 #
 788 # @id: the chardev's ID, must exist
 789 #
 790 # Since: 2.10
 791 #
 792 # Example:
 793 #
 794 #     -> { "execute": "chardev-send-break", "arguments": { "id" : "foo" } }
 795 #     <- { "return": {} }
 796 ##
 797 { 'command': 'chardev-send-break',
 798   'data': { 'id': 'str' } }
 799
 800 ##
 801 # @VSERPORT_CHANGE:
 802 #
 803 # Emitted when the guest opens or closes a virtio-serial port.
 804 #
 805 # @id: device identifier of the virtio-serial port
 806 #
 807 # @open: true if the guest has opened the virtio-serial port
 808 #
 809 # Note: This event is rate-limited.
 810 #
 811 # Since: 2.1
 812 #
 813 # Example:
 814 #
 815 #     <- { "event": "VSERPORT_CHANGE",
 816 #          "data": { "id": "channel0", "open": true },
 817 #          "timestamp": { "seconds": 1401385907, "microseconds": 422329 } }
 818 ##
 819 { 'event': 'VSERPORT_CHANGE',
 820   'data': { 'id': 'str',
 821             'open': 'bool' } }