23e4645258
The only instances that get changed are those in which the additional whitespace was not (or couldn't possibly be) used for alignment purposes. Signed-off-by: Andrea Bolognani <abologna@redhat.com> Message-Id: <20220503073737.84223-7-abologna@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
576 lines
17 KiB
Python
576 lines
17 KiB
Python
# -*- Mode: Python -*-
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# vim: filetype=python
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##
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# = Block devices
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##
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{ 'include': 'block-core.json' }
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##
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# == Additional block stuff (VM related)
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##
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##
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# @BiosAtaTranslation:
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#
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# Policy that BIOS should use to interpret cylinder/head/sector
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# addresses. Note that Bochs BIOS and SeaBIOS will not actually
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# translate logical CHS to physical; instead, they will use logical
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# block addressing.
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#
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# @auto: If cylinder/heads/sizes are passed, choose between none and LBA
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# depending on the size of the disk. If they are not passed,
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# choose none if QEMU can guess that the disk had 16 or fewer
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# heads, large if QEMU can guess that the disk had 131072 or
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# fewer tracks across all heads (i.e. cylinders*heads<131072),
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# otherwise LBA.
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#
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# @none: The physical disk geometry is equal to the logical geometry.
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#
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# @lba: Assume 63 sectors per track and one of 16, 32, 64, 128 or 255
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# heads (if fewer than 255 are enough to cover the whole disk
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# with 1024 cylinders/head). The number of cylinders/head is
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# then computed based on the number of sectors and heads.
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#
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# @large: The number of cylinders per head is scaled down to 1024
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# by correspondingly scaling up the number of heads.
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#
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# @rechs: Same as @large, but first convert a 16-head geometry to
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# 15-head, by proportionally scaling up the number of
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# cylinders/head.
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#
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# Since: 2.0
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##
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{ 'enum': 'BiosAtaTranslation',
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'data': ['auto', 'none', 'lba', 'large', 'rechs']}
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##
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# @FloppyDriveType:
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#
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# Type of Floppy drive to be emulated by the Floppy Disk Controller.
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#
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# @144: 1.44MB 3.5" drive
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# @288: 2.88MB 3.5" drive
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# @120: 1.2MB 5.25" drive
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# @none: No drive connected
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# @auto: Automatically determined by inserted media at boot
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#
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# Since: 2.6
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##
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{ 'enum': 'FloppyDriveType',
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'data': ['144', '288', '120', 'none', 'auto']}
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##
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# @PRManagerInfo:
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#
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# Information about a persistent reservation manager
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#
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# @id: the identifier of the persistent reservation manager
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#
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# @connected: true if the persistent reservation manager is connected to
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# the underlying storage or helper
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#
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# Since: 3.0
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##
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{ 'struct': 'PRManagerInfo',
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'data': {'id': 'str', 'connected': 'bool'} }
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##
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# @query-pr-managers:
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#
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# Returns a list of information about each persistent reservation manager.
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#
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# Returns: a list of @PRManagerInfo for each persistent reservation manager
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#
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# Since: 3.0
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##
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{ 'command': 'query-pr-managers', 'returns': ['PRManagerInfo'],
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'allow-preconfig': true }
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##
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# @eject:
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#
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# Ejects the medium from a removable drive.
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#
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# @device: Block device name
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#
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# @id: The name or QOM path of the guest device (since: 2.8)
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#
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# @force: If true, eject regardless of whether the drive is locked.
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# If not specified, the default value is false.
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#
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# Features:
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# @deprecated: Member @device is deprecated. Use @id instead.
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#
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# Returns: - Nothing on success
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# - If @device is not a valid block device, DeviceNotFound
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#
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# Notes: Ejecting a device with no media results in success
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#
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# Since: 0.14
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#
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# Example:
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#
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# -> { "execute": "eject", "arguments": { "id": "ide1-0-1" } }
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# <- { "return": {} }
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##
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{ 'command': 'eject',
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'data': { '*device': { 'type': 'str', 'features': [ 'deprecated' ] },
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'*id': 'str',
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'*force': 'bool' } }
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##
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# @blockdev-open-tray:
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#
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# Opens a block device's tray. If there is a block driver state tree inserted as
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# a medium, it will become inaccessible to the guest (but it will remain
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# associated to the block device, so closing the tray will make it accessible
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# again).
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#
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# If the tray was already open before, this will be a no-op.
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#
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# Once the tray opens, a DEVICE_TRAY_MOVED event is emitted. There are cases in
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# which no such event will be generated, these include:
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#
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# - if the guest has locked the tray, @force is false and the guest does not
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# respond to the eject request
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# - if the BlockBackend denoted by @device does not have a guest device attached
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# to it
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# - if the guest device does not have an actual tray
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#
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# @device: Block device name
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#
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# @id: The name or QOM path of the guest device (since: 2.8)
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#
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# @force: if false (the default), an eject request will be sent to
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# the guest if it has locked the tray (and the tray will not be opened
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# immediately); if true, the tray will be opened regardless of whether
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# it is locked
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#
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# Features:
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# @deprecated: Member @device is deprecated. Use @id instead.
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#
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# Since: 2.5
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#
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# Example:
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#
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# -> { "execute": "blockdev-open-tray",
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# "arguments": { "id": "ide0-1-0" } }
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#
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# <- { "timestamp": { "seconds": 1418751016,
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# "microseconds": 716996 },
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# "event": "DEVICE_TRAY_MOVED",
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# "data": { "device": "ide1-cd0",
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# "id": "ide0-1-0",
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# "tray-open": true } }
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#
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# <- { "return": {} }
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#
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##
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{ 'command': 'blockdev-open-tray',
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'data': { '*device': { 'type': 'str', 'features': [ 'deprecated' ] },
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'*id': 'str',
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'*force': 'bool' } }
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##
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# @blockdev-close-tray:
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#
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# Closes a block device's tray. If there is a block driver state tree associated
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# with the block device (which is currently ejected), that tree will be loaded
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# as the medium.
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#
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# If the tray was already closed before, this will be a no-op.
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#
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# @device: Block device name
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#
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# @id: The name or QOM path of the guest device (since: 2.8)
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#
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# Features:
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# @deprecated: Member @device is deprecated. Use @id instead.
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#
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# Since: 2.5
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#
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# Example:
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#
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# -> { "execute": "blockdev-close-tray",
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# "arguments": { "id": "ide0-1-0" } }
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#
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# <- { "timestamp": { "seconds": 1418751345,
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# "microseconds": 272147 },
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# "event": "DEVICE_TRAY_MOVED",
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# "data": { "device": "ide1-cd0",
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# "id": "ide0-1-0",
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# "tray-open": false } }
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#
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# <- { "return": {} }
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#
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##
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{ 'command': 'blockdev-close-tray',
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'data': { '*device': { 'type': 'str', 'features': [ 'deprecated' ] },
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'*id': 'str' } }
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##
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# @blockdev-remove-medium:
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#
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# Removes a medium (a block driver state tree) from a block device. That block
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# device's tray must currently be open (unless there is no attached guest
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# device).
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#
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# If the tray is open and there is no medium inserted, this will be a no-op.
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#
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# @id: The name or QOM path of the guest device
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#
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# Since: 2.12
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#
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# Example:
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#
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# -> { "execute": "blockdev-remove-medium",
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# "arguments": { "id": "ide0-1-0" } }
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#
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# <- { "error": { "class": "GenericError",
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# "desc": "Tray of device 'ide0-1-0' is not open" } }
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#
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# -> { "execute": "blockdev-open-tray",
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# "arguments": { "id": "ide0-1-0" } }
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#
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# <- { "timestamp": { "seconds": 1418751627,
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# "microseconds": 549958 },
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# "event": "DEVICE_TRAY_MOVED",
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# "data": { "device": "ide1-cd0",
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# "id": "ide0-1-0",
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# "tray-open": true } }
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#
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# <- { "return": {} }
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#
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# -> { "execute": "blockdev-remove-medium",
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# "arguments": { "id": "ide0-1-0" } }
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#
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# <- { "return": {} }
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#
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##
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{ 'command': 'blockdev-remove-medium',
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'data': { 'id': 'str' } }
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##
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# @blockdev-insert-medium:
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#
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# Inserts a medium (a block driver state tree) into a block device. That block
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# device's tray must currently be open (unless there is no attached guest
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# device) and there must be no medium inserted already.
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#
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# @id: The name or QOM path of the guest device
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#
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# @node-name: name of a node in the block driver state graph
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#
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# Since: 2.12
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#
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# Example:
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#
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# -> { "execute": "blockdev-add",
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# "arguments": {
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# "node-name": "node0",
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# "driver": "raw",
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# "file": { "driver": "file",
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# "filename": "fedora.iso" } } }
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# <- { "return": {} }
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#
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# -> { "execute": "blockdev-insert-medium",
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# "arguments": { "id": "ide0-1-0",
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# "node-name": "node0" } }
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#
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# <- { "return": {} }
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#
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##
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{ 'command': 'blockdev-insert-medium',
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'data': { 'id': 'str',
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'node-name': 'str'} }
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##
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# @BlockdevChangeReadOnlyMode:
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#
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# Specifies the new read-only mode of a block device subject to the
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# @blockdev-change-medium command.
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#
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# @retain: Retains the current read-only mode
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#
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# @read-only: Makes the device read-only
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#
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# @read-write: Makes the device writable
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#
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# Since: 2.3
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##
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{ 'enum': 'BlockdevChangeReadOnlyMode',
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'data': ['retain', 'read-only', 'read-write'] }
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##
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# @blockdev-change-medium:
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#
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# Changes the medium inserted into a block device by ejecting the current medium
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# and loading a new image file which is inserted as the new medium (this command
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# combines blockdev-open-tray, blockdev-remove-medium, blockdev-insert-medium
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# and blockdev-close-tray).
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#
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# @device: Block device name
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#
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# @id: The name or QOM path of the guest device
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# (since: 2.8)
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#
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# @filename: filename of the new image to be loaded
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#
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# @format: format to open the new image with (defaults to
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# the probed format)
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#
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# @read-only-mode: change the read-only mode of the device; defaults
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# to 'retain'
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#
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# @force: if false (the default), an eject request through blockdev-open-tray
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# will be sent to the guest if it has locked the tray (and the tray
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# will not be opened immediately); if true, the tray will be opened
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# regardless of whether it is locked. (since 7.1)
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#
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# Features:
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# @deprecated: Member @device is deprecated. Use @id instead.
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#
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# Since: 2.5
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#
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# Examples:
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#
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# 1. Change a removable medium
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#
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# -> { "execute": "blockdev-change-medium",
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# "arguments": { "id": "ide0-1-0",
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# "filename": "/srv/images/Fedora-12-x86_64-DVD.iso",
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# "format": "raw" } }
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# <- { "return": {} }
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#
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# 2. Load a read-only medium into a writable drive
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#
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# -> { "execute": "blockdev-change-medium",
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# "arguments": { "id": "floppyA",
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# "filename": "/srv/images/ro.img",
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# "format": "raw",
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# "read-only-mode": "retain" } }
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#
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# <- { "error":
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# { "class": "GenericError",
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# "desc": "Could not open '/srv/images/ro.img': Permission denied" } }
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#
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# -> { "execute": "blockdev-change-medium",
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# "arguments": { "id": "floppyA",
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# "filename": "/srv/images/ro.img",
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# "format": "raw",
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# "read-only-mode": "read-only" } }
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#
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# <- { "return": {} }
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#
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##
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{ 'command': 'blockdev-change-medium',
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'data': { '*device': { 'type': 'str', 'features': [ 'deprecated' ] },
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'*id': 'str',
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'filename': 'str',
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'*format': 'str',
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'*force': 'bool',
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'*read-only-mode': 'BlockdevChangeReadOnlyMode' } }
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##
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# @DEVICE_TRAY_MOVED:
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#
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# Emitted whenever the tray of a removable device is moved by the guest or by
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# HMP/QMP commands
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#
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# @device: Block device name. This is always present for compatibility
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# reasons, but it can be empty ("") if the image does not
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# have a device name associated.
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#
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# @id: The name or QOM path of the guest device (since 2.8)
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#
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# @tray-open: true if the tray has been opened or false if it has been closed
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#
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# Since: 1.1
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#
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# Example:
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#
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# <- { "event": "DEVICE_TRAY_MOVED",
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# "data": { "device": "ide1-cd0",
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# "id": "/machine/unattached/device[22]",
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# "tray-open": true
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# },
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# "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
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#
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##
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{ 'event': 'DEVICE_TRAY_MOVED',
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'data': { 'device': 'str', 'id': 'str', 'tray-open': 'bool' } }
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##
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# @PR_MANAGER_STATUS_CHANGED:
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#
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# Emitted whenever the connected status of a persistent reservation
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# manager changes.
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#
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# @id: The id of the PR manager object
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#
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# @connected: true if the PR manager is connected to a backend
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#
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# Since: 3.0
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#
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# Example:
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#
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# <- { "event": "PR_MANAGER_STATUS_CHANGED",
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# "data": { "id": "pr-helper0",
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# "connected": true
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# },
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# "timestamp": { "seconds": 1519840375, "microseconds": 450486 } }
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#
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##
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{ 'event': 'PR_MANAGER_STATUS_CHANGED',
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'data': { 'id': 'str', 'connected': 'bool' } }
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##
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# @block_set_io_throttle:
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#
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# Change I/O throttle limits for a block drive.
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#
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# Since QEMU 2.4, each device with I/O limits is member of a throttle
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# group.
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#
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# If two or more devices are members of the same group, the limits
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# will apply to the combined I/O of the whole group in a round-robin
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# fashion. Therefore, setting new I/O limits to a device will affect
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# the whole group.
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#
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# The name of the group can be specified using the 'group' parameter.
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# If the parameter is unset, it is assumed to be the current group of
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# that device. If it's not in any group yet, the name of the device
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# will be used as the name for its group.
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#
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# The 'group' parameter can also be used to move a device to a
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# different group. In this case the limits specified in the parameters
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# will be applied to the new group only.
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#
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# I/O limits can be disabled by setting all of them to 0. In this case
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# the device will be removed from its group and the rest of its
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# members will not be affected. The 'group' parameter is ignored.
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#
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# Returns: - Nothing on success
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# - If @device is not a valid block device, DeviceNotFound
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#
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# Since: 1.1
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#
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# Example:
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#
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# -> { "execute": "block_set_io_throttle",
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# "arguments": { "id": "virtio-blk-pci0/virtio-backend",
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# "bps": 0,
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# "bps_rd": 0,
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# "bps_wr": 0,
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# "iops": 512,
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# "iops_rd": 0,
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# "iops_wr": 0,
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# "bps_max": 0,
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# "bps_rd_max": 0,
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# "bps_wr_max": 0,
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# "iops_max": 0,
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# "iops_rd_max": 0,
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# "iops_wr_max": 0,
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# "bps_max_length": 0,
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# "iops_size": 0 } }
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# <- { "return": {} }
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#
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# -> { "execute": "block_set_io_throttle",
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# "arguments": { "id": "ide0-1-0",
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# "bps": 1000000,
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# "bps_rd": 0,
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# "bps_wr": 0,
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# "iops": 0,
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# "iops_rd": 0,
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# "iops_wr": 0,
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# "bps_max": 8000000,
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# "bps_rd_max": 0,
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# "bps_wr_max": 0,
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# "iops_max": 0,
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# "iops_rd_max": 0,
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# "iops_wr_max": 0,
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# "bps_max_length": 60,
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# "iops_size": 0 } }
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# <- { "return": {} }
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##
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{ 'command': 'block_set_io_throttle', 'boxed': true,
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'data': 'BlockIOThrottle' }
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##
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# @block-latency-histogram-set:
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#
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# Manage read, write and flush latency histograms for the device.
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#
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# If only @id parameter is specified, remove all present latency histograms
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# for the device. Otherwise, add/reset some of (or all) latency histograms.
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#
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# @id: The name or QOM path of the guest device.
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#
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# @boundaries: list of interval boundary values (see description in
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# BlockLatencyHistogramInfo definition). If specified, all
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# latency histograms are removed, and empty ones created for all
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# io types with intervals corresponding to @boundaries (except for
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# io types, for which specific boundaries are set through the
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# following parameters).
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#
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# @boundaries-read: list of interval boundary values for read latency
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# histogram. If specified, old read latency histogram is
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# removed, and empty one created with intervals
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# corresponding to @boundaries-read. The parameter has higher
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# priority then @boundaries.
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#
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# @boundaries-write: list of interval boundary values for write latency
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# histogram.
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#
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# @boundaries-flush: list of interval boundary values for flush latency
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# histogram.
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#
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# Returns: error if device is not found or any boundary arrays are invalid.
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#
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# Since: 4.0
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#
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# Example:
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# set new histograms for all io types with intervals
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# [0, 10), [10, 50), [50, 100), [100, +inf):
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#
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# -> { "execute": "block-latency-histogram-set",
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# "arguments": { "id": "drive0",
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# "boundaries": [10, 50, 100] } }
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# <- { "return": {} }
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#
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# Example:
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# set new histogram only for write, other histograms will remain
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# not changed (or not created):
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#
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# -> { "execute": "block-latency-histogram-set",
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# "arguments": { "id": "drive0",
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# "boundaries-write": [10, 50, 100] } }
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# <- { "return": {} }
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#
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# Example:
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# set new histograms with the following intervals:
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# read, flush: [0, 10), [10, 50), [50, 100), [100, +inf)
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# write: [0, 1000), [1000, 5000), [5000, +inf)
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#
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# -> { "execute": "block-latency-histogram-set",
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# "arguments": { "id": "drive0",
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# "boundaries": [10, 50, 100],
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# "boundaries-write": [1000, 5000] } }
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# <- { "return": {} }
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#
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# Example:
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# remove all latency histograms:
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#
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# -> { "execute": "block-latency-histogram-set",
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# "arguments": { "id": "drive0" } }
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# <- { "return": {} }
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##
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{ 'command': 'block-latency-histogram-set',
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'data': {'id': 'str',
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'*boundaries': ['uint64'],
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'*boundaries-read': ['uint64'],
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'*boundaries-write': ['uint64'],
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'*boundaries-flush': ['uint64'] } }
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