1# -*- Mode: Python -*- 2# vim: filetype=python 3 4## 5# = Block devices 6## 7 8{ 'include': 'block-core.json' } 9 10## 11# == Additional block stuff (VM related) 12## 13 14## 15# @BiosAtaTranslation: 16# 17# Policy that BIOS should use to interpret cylinder/head/sector 18# addresses. Note that Bochs BIOS and SeaBIOS will not actually 19# translate logical CHS to physical; instead, they will use logical 20# block addressing. 21# 22# @auto: If cylinder/heads/sizes are passed, choose between none and 23# LBA depending on the size of the disk. If they are not passed, 24# choose none if QEMU can guess that the disk had 16 or fewer 25# heads, large if QEMU can guess that the disk had 131072 or fewer 26# tracks across all heads (i.e. cylinders*heads<131072), otherwise 27# LBA. 28# 29# @none: The physical disk geometry is equal to the logical geometry. 30# 31# @lba: Assume 63 sectors per track and one of 16, 32, 64, 128 or 255 32# heads (if fewer than 255 are enough to cover the whole disk with 33# 1024 cylinders/head). The number of cylinders/head is then 34# computed based on the number of sectors and heads. 35# 36# @large: The number of cylinders per head is scaled down to 1024 by 37# correspondingly scaling up the number of heads. 38# 39# @rechs: Same as @large, but first convert a 16-head geometry to 40# 15-head, by proportionally scaling up the number of 41# cylinders/head. 42# 43# Since: 2.0 44## 45{ 'enum': 'BiosAtaTranslation', 46 'data': ['auto', 'none', 'lba', 'large', 'rechs']} 47 48## 49# @FloppyDriveType: 50# 51# Type of Floppy drive to be emulated by the Floppy Disk Controller. 52# 53# @144: 1.44MB 3.5" drive 54# 55# @288: 2.88MB 3.5" drive 56# 57# @120: 1.2MB 5.25" drive 58# 59# @none: No drive connected 60# 61# @auto: Automatically determined by inserted media at boot 62# 63# Since: 2.6 64## 65{ 'enum': 'FloppyDriveType', 66 'data': ['144', '288', '120', 'none', 'auto']} 67 68## 69# @PRManagerInfo: 70# 71# Information about a persistent reservation manager 72# 73# @id: the identifier of the persistent reservation manager 74# 75# @connected: true if the persistent reservation manager is connected 76# to the underlying storage or helper 77# 78# Since: 3.0 79## 80{ 'struct': 'PRManagerInfo', 81 'data': {'id': 'str', 'connected': 'bool'} } 82 83## 84# @query-pr-managers: 85# 86# Returns a list of information about each persistent reservation 87# manager. 88# 89# Returns: a list of @PRManagerInfo for each persistent reservation 90# manager 91# 92# Since: 3.0 93## 94{ 'command': 'query-pr-managers', 'returns': ['PRManagerInfo'], 95 'allow-preconfig': true } 96 97## 98# @eject: 99# 100# Ejects the medium from a removable drive. 101# 102# @device: Block device name 103# 104# @id: The name or QOM path of the guest device (since: 2.8) 105# 106# @force: If true, eject regardless of whether the drive is locked. 107# If not specified, the default value is false. 108# 109# Features: 110# 111# @deprecated: Member @device is deprecated. Use @id instead. 112# 113# Returns: 114# - Nothing on success 115# - If @device is not a valid block device, DeviceNotFound 116# 117# Notes: Ejecting a device with no media results in success 118# 119# Since: 0.14 120# 121# Example: 122# 123# -> { "execute": "eject", "arguments": { "id": "ide1-0-1" } } 124# <- { "return": {} } 125## 126{ 'command': 'eject', 127 'data': { '*device': { 'type': 'str', 'features': [ 'deprecated' ] }, 128 '*id': 'str', 129 '*force': 'bool' } } 130 131## 132# @blockdev-open-tray: 133# 134# Opens a block device's tray. If there is a block driver state tree 135# inserted as a medium, it will become inaccessible to the guest (but 136# it will remain associated to the block device, so closing the tray 137# will make it accessible again). 138# 139# If the tray was already open before, this will be a no-op. 140# 141# Once the tray opens, a DEVICE_TRAY_MOVED event is emitted. There 142# are cases in which no such event will be generated, these include: 143# 144# - if the guest has locked the tray, @force is false and the guest 145# does not respond to the eject request 146# - if the BlockBackend denoted by @device does not have a guest 147# device attached to it 148# - if the guest device does not have an actual tray 149# 150# @device: Block device name 151# 152# @id: The name or QOM path of the guest device (since: 2.8) 153# 154# @force: if false (the default), an eject request will be sent to the 155# guest if it has locked the tray (and the tray will not be opened 156# immediately); if true, the tray will be opened regardless of 157# whether it is locked 158# 159# Features: 160# 161# @deprecated: Member @device is deprecated. Use @id instead. 162# 163# Since: 2.5 164# 165# Example: 166# 167# -> { "execute": "blockdev-open-tray", 168# "arguments": { "id": "ide0-1-0" } } 169# 170# <- { "timestamp": { "seconds": 1418751016, 171# "microseconds": 716996 }, 172# "event": "DEVICE_TRAY_MOVED", 173# "data": { "device": "ide1-cd0", 174# "id": "ide0-1-0", 175# "tray-open": true } } 176# 177# <- { "return": {} } 178## 179{ 'command': 'blockdev-open-tray', 180 'data': { '*device': { 'type': 'str', 'features': [ 'deprecated' ] }, 181 '*id': 'str', 182 '*force': 'bool' } } 183 184## 185# @blockdev-close-tray: 186# 187# Closes a block device's tray. If there is a block driver state tree 188# associated with the block device (which is currently ejected), that 189# tree will be loaded as the medium. 190# 191# If the tray was already closed before, this will be a no-op. 192# 193# @device: Block device name 194# 195# @id: The name or QOM path of the guest device (since: 2.8) 196# 197# Features: 198# 199# @deprecated: Member @device is deprecated. Use @id instead. 200# 201# Since: 2.5 202# 203# Example: 204# 205# -> { "execute": "blockdev-close-tray", 206# "arguments": { "id": "ide0-1-0" } } 207# 208# <- { "timestamp": { "seconds": 1418751345, 209# "microseconds": 272147 }, 210# "event": "DEVICE_TRAY_MOVED", 211# "data": { "device": "ide1-cd0", 212# "id": "ide0-1-0", 213# "tray-open": false } } 214# 215# <- { "return": {} } 216## 217{ 'command': 'blockdev-close-tray', 218 'data': { '*device': { 'type': 'str', 'features': [ 'deprecated' ] }, 219 '*id': 'str' } } 220 221## 222# @blockdev-remove-medium: 223# 224# Removes a medium (a block driver state tree) from a block device. 225# That block device's tray must currently be open (unless there is no 226# attached guest device). 227# 228# If the tray is open and there is no medium inserted, this will be a 229# no-op. 230# 231# @id: The name or QOM path of the guest device 232# 233# Since: 2.12 234# 235# Example: 236# 237# -> { "execute": "blockdev-remove-medium", 238# "arguments": { "id": "ide0-1-0" } } 239# 240# <- { "error": { "class": "GenericError", 241# "desc": "Tray of device 'ide0-1-0' is not open" } } 242# 243# -> { "execute": "blockdev-open-tray", 244# "arguments": { "id": "ide0-1-0" } } 245# 246# <- { "timestamp": { "seconds": 1418751627, 247# "microseconds": 549958 }, 248# "event": "DEVICE_TRAY_MOVED", 249# "data": { "device": "ide1-cd0", 250# "id": "ide0-1-0", 251# "tray-open": true } } 252# 253# <- { "return": {} } 254# 255# -> { "execute": "blockdev-remove-medium", 256# "arguments": { "id": "ide0-1-0" } } 257# 258# <- { "return": {} } 259## 260{ 'command': 'blockdev-remove-medium', 261 'data': { 'id': 'str' } } 262 263## 264# @blockdev-insert-medium: 265# 266# Inserts a medium (a block driver state tree) into a block device. 267# That block device's tray must currently be open (unless there is no 268# attached guest device) and there must be no medium inserted already. 269# 270# @id: The name or QOM path of the guest device 271# 272# @node-name: name of a node in the block driver state graph 273# 274# Since: 2.12 275# 276# Example: 277# 278# -> { "execute": "blockdev-add", 279# "arguments": { 280# "node-name": "node0", 281# "driver": "raw", 282# "file": { "driver": "file", 283# "filename": "fedora.iso" } } } 284# <- { "return": {} } 285# 286# -> { "execute": "blockdev-insert-medium", 287# "arguments": { "id": "ide0-1-0", 288# "node-name": "node0" } } 289# 290# <- { "return": {} } 291## 292{ 'command': 'blockdev-insert-medium', 293 'data': { 'id': 'str', 294 'node-name': 'str'} } 295 296## 297# @BlockdevChangeReadOnlyMode: 298# 299# Specifies the new read-only mode of a block device subject to the 300# @blockdev-change-medium command. 301# 302# @retain: Retains the current read-only mode 303# 304# @read-only: Makes the device read-only 305# 306# @read-write: Makes the device writable 307# 308# Since: 2.3 309## 310{ 'enum': 'BlockdevChangeReadOnlyMode', 311 'data': ['retain', 'read-only', 'read-write'] } 312 313## 314# @blockdev-change-medium: 315# 316# Changes the medium inserted into a block device by ejecting the 317# current medium and loading a new image file which is inserted as the 318# new medium (this command combines blockdev-open-tray, 319# blockdev-remove-medium, blockdev-insert-medium and 320# blockdev-close-tray). 321# 322# @device: Block device name 323# 324# @id: The name or QOM path of the guest device (since: 2.8) 325# 326# @filename: filename of the new image to be loaded 327# 328# @format: format to open the new image with (defaults to the probed 329# format) 330# 331# @read-only-mode: change the read-only mode of the device; defaults 332# to 'retain' 333# 334# @force: if false (the default), an eject request through 335# blockdev-open-tray will be sent to the guest if it has locked 336# the tray (and the tray will not be opened immediately); if true, 337# the tray will be opened regardless of whether it is locked. 338# (since 7.1) 339# 340# Features: 341# 342# @deprecated: Member @device is deprecated. Use @id instead. 343# 344# Since: 2.5 345# 346# Examples: 347# 348# 1. Change a removable medium 349# 350# -> { "execute": "blockdev-change-medium", 351# "arguments": { "id": "ide0-1-0", 352# "filename": "/srv/images/Fedora-12-x86_64-DVD.iso", 353# "format": "raw" } } 354# <- { "return": {} } 355# 356# 2. Load a read-only medium into a writable drive 357# 358# -> { "execute": "blockdev-change-medium", 359# "arguments": { "id": "floppyA", 360# "filename": "/srv/images/ro.img", 361# "format": "raw", 362# "read-only-mode": "retain" } } 363# 364# <- { "error": 365# { "class": "GenericError", 366# "desc": "Could not open '/srv/images/ro.img': Permission denied" } } 367# 368# -> { "execute": "blockdev-change-medium", 369# "arguments": { "id": "floppyA", 370# "filename": "/srv/images/ro.img", 371# "format": "raw", 372# "read-only-mode": "read-only" } } 373# 374# <- { "return": {} } 375## 376{ 'command': 'blockdev-change-medium', 377 'data': { '*device': { 'type': 'str', 'features': [ 'deprecated' ] }, 378 '*id': 'str', 379 'filename': 'str', 380 '*format': 'str', 381 '*force': 'bool', 382 '*read-only-mode': 'BlockdevChangeReadOnlyMode' } } 383 384## 385# @DEVICE_TRAY_MOVED: 386# 387# Emitted whenever the tray of a removable device is moved by the 388# guest or by HMP/QMP commands 389# 390# @device: Block device name. This is always present for 391# compatibility reasons, but it can be empty ("") if the image 392# does not have a device name associated. 393# 394# @id: The name or QOM path of the guest device (since 2.8) 395# 396# @tray-open: true if the tray has been opened or false if it has been 397# closed 398# 399# Since: 1.1 400# 401# Example: 402# 403# <- { "event": "DEVICE_TRAY_MOVED", 404# "data": { "device": "ide1-cd0", 405# "id": "/machine/unattached/device[22]", 406# "tray-open": true 407# }, 408# "timestamp": { "seconds": 1265044230, "microseconds": 450486 } } 409## 410{ 'event': 'DEVICE_TRAY_MOVED', 411 'data': { 'device': 'str', 'id': 'str', 'tray-open': 'bool' } } 412 413## 414# @PR_MANAGER_STATUS_CHANGED: 415# 416# Emitted whenever the connected status of a persistent reservation 417# manager changes. 418# 419# @id: The id of the PR manager object 420# 421# @connected: true if the PR manager is connected to a backend 422# 423# Since: 3.0 424# 425# Example: 426# 427# <- { "event": "PR_MANAGER_STATUS_CHANGED", 428# "data": { "id": "pr-helper0", 429# "connected": true 430# }, 431# "timestamp": { "seconds": 1519840375, "microseconds": 450486 } } 432## 433{ 'event': 'PR_MANAGER_STATUS_CHANGED', 434 'data': { 'id': 'str', 'connected': 'bool' } } 435 436## 437# @block_set_io_throttle: 438# 439# Change I/O throttle limits for a block drive. 440# 441# Since QEMU 2.4, each device with I/O limits is member of a throttle 442# group. 443# 444# If two or more devices are members of the same group, the limits 445# will apply to the combined I/O of the whole group in a round-robin 446# fashion. Therefore, setting new I/O limits to a device will affect 447# the whole group. 448# 449# The name of the group can be specified using the 'group' parameter. 450# If the parameter is unset, it is assumed to be the current group of 451# that device. If it's not in any group yet, the name of the device 452# will be used as the name for its group. 453# 454# The 'group' parameter can also be used to move a device to a 455# different group. In this case the limits specified in the 456# parameters will be applied to the new group only. 457# 458# I/O limits can be disabled by setting all of them to 0. In this case 459# the device will be removed from its group and the rest of its 460# members will not be affected. The 'group' parameter is ignored. 461# 462# Returns: 463# - Nothing on success 464# - If @device is not a valid block device, DeviceNotFound 465# 466# Since: 1.1 467# 468# Examples: 469# 470# -> { "execute": "block_set_io_throttle", 471# "arguments": { "id": "virtio-blk-pci0/virtio-backend", 472# "bps": 0, 473# "bps_rd": 0, 474# "bps_wr": 0, 475# "iops": 512, 476# "iops_rd": 0, 477# "iops_wr": 0, 478# "bps_max": 0, 479# "bps_rd_max": 0, 480# "bps_wr_max": 0, 481# "iops_max": 0, 482# "iops_rd_max": 0, 483# "iops_wr_max": 0, 484# "bps_max_length": 0, 485# "iops_size": 0 } } 486# <- { "return": {} } 487# 488# -> { "execute": "block_set_io_throttle", 489# "arguments": { "id": "ide0-1-0", 490# "bps": 1000000, 491# "bps_rd": 0, 492# "bps_wr": 0, 493# "iops": 0, 494# "iops_rd": 0, 495# "iops_wr": 0, 496# "bps_max": 8000000, 497# "bps_rd_max": 0, 498# "bps_wr_max": 0, 499# "iops_max": 0, 500# "iops_rd_max": 0, 501# "iops_wr_max": 0, 502# "bps_max_length": 60, 503# "iops_size": 0 } } 504# <- { "return": {} } 505## 506{ 'command': 'block_set_io_throttle', 'boxed': true, 507 'data': 'BlockIOThrottle', 508 'allow-preconfig': true } 509 510## 511# @block-latency-histogram-set: 512# 513# Manage read, write and flush latency histograms for the device. 514# 515# If only @id parameter is specified, remove all present latency 516# histograms for the device. Otherwise, add/reset some of (or all) 517# latency histograms. 518# 519# @id: The name or QOM path of the guest device. 520# 521# @boundaries: list of interval boundary values (see description in 522# BlockLatencyHistogramInfo definition). If specified, all latency 523# histograms are removed, and empty ones created for all io types 524# with intervals corresponding to @boundaries (except for io 525# types, for which specific boundaries are set through the 526# following parameters). 527# 528# @boundaries-read: list of interval boundary values for read latency 529# histogram. If specified, old read latency histogram is removed, 530# and empty one created with intervals corresponding to 531# @boundaries-read. The parameter has higher priority then 532# @boundaries. 533# 534# @boundaries-write: list of interval boundary values for write 535# latency histogram. 536# 537# @boundaries-zap: list of interval boundary values for zone append 538# write latency histogram. 539# 540# @boundaries-flush: list of interval boundary values for flush 541# latency histogram. 542# 543# Returns: error if device is not found or any boundary arrays are 544# invalid. 545# 546# Since: 4.0 547# 548# Example: 549# 550# Set new histograms for all io types with intervals [0, 10), [10, 551# 50), [50, 100), [100, +inf): 552# 553# -> { "execute": "block-latency-histogram-set", 554# "arguments": { "id": "drive0", 555# "boundaries": [10, 50, 100] } } 556# <- { "return": {} } 557# 558# Example: 559# 560# Set new histogram only for write, other histograms will remain not 561# changed (or not created): 562# 563# -> { "execute": "block-latency-histogram-set", 564# "arguments": { "id": "drive0", 565# "boundaries-write": [10, 50, 100] } } 566# <- { "return": {} } 567# 568# Example: 569# 570# Set new histograms with the following intervals: read, flush: [0, 571# 10), [10, 50), [50, 100), [100, +inf) write: [0, 1000), [1000, 572# 5000), [5000, +inf) 573# 574# -> { "execute": "block-latency-histogram-set", 575# "arguments": { "id": "drive0", 576# "boundaries": [10, 50, 100], 577# "boundaries-write": [1000, 5000] } } 578# <- { "return": {} } 579# 580# Example: 581# 582# Remove all latency histograms: 583# 584# -> { "execute": "block-latency-histogram-set", 585# "arguments": { "id": "drive0" } } 586# <- { "return": {} } 587## 588{ 'command': 'block-latency-histogram-set', 589 'data': {'id': 'str', 590 '*boundaries': ['uint64'], 591 '*boundaries-read': ['uint64'], 592 '*boundaries-write': ['uint64'], 593 '*boundaries-zap': ['uint64'], 594 '*boundaries-flush': ['uint64'] }, 595 'allow-preconfig': true } 596