Allow blockdevs to match the feature already present in qemu-nbd -D. Enhance iotest 223 to cover it. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20191114024635.11363-5-eblake@redhat.com>
459 lines
13 KiB
Python
459 lines
13 KiB
Python
# -*- Mode: 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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# @BlockdevSnapshotInternal:
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#
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# @device: the device name or node-name of a root node to generate the snapshot
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# from
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#
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# @name: the name of the internal snapshot to be created
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#
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# Notes: In transaction, if @name is empty, or any snapshot matching @name
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# exists, the operation will fail. Only some image formats support it,
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# for example, qcow2, rbd, and sheepdog.
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#
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# Since: 1.7
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##
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{ 'struct': 'BlockdevSnapshotInternal',
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'data': { 'device': 'str', 'name': 'str' } }
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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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# @blockdev-snapshot-internal-sync:
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#
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# Synchronously take an internal snapshot of a block device, when the
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# format of the image used supports it. If the name is an empty
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# string, or a snapshot with name already exists, the operation will
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# fail.
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#
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# For the arguments, see the documentation of BlockdevSnapshotInternal.
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#
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# Returns: nothing on success
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#
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# If @device is not a valid block device, GenericError
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#
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# If any snapshot matching @name exists, or @name is empty,
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# GenericError
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#
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# If the format of the image used does not support it,
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# BlockFormatFeatureNotSupported
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#
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# Since: 1.7
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#
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# Example:
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#
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# -> { "execute": "blockdev-snapshot-internal-sync",
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# "arguments": { "device": "ide-hd0",
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# "name": "snapshot0" }
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# }
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# <- { "return": {} }
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#
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##
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{ 'command': 'blockdev-snapshot-internal-sync',
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'data': 'BlockdevSnapshotInternal' }
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##
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# @blockdev-snapshot-delete-internal-sync:
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#
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# Synchronously delete an internal snapshot of a block device, when the format
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# of the image used support it. The snapshot is identified by name or id or
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# both. One of the name or id is required. Return SnapshotInfo for the
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# successfully deleted snapshot.
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#
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# @device: the device name or node-name of a root node to delete the snapshot
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# from
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#
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# @id: optional the snapshot's ID to be deleted
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#
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# @name: optional the snapshot's name to be deleted
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#
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# Returns: SnapshotInfo on success
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# If @device is not a valid block device, GenericError
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# If snapshot not found, GenericError
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# If the format of the image used does not support it,
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# BlockFormatFeatureNotSupported
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# If @id and @name are both not specified, GenericError
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#
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# Since: 1.7
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#
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# Example:
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#
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# -> { "execute": "blockdev-snapshot-delete-internal-sync",
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# "arguments": { "device": "ide-hd0",
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# "name": "snapshot0" }
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# }
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# <- { "return": {
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# "id": "1",
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# "name": "snapshot0",
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# "vm-state-size": 0,
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# "date-sec": 1000012,
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# "date-nsec": 10,
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# "vm-clock-sec": 100,
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# "vm-clock-nsec": 20
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# }
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# }
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#
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##
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{ 'command': 'blockdev-snapshot-delete-internal-sync',
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'data': { 'device': 'str', '*id': 'str', '*name': 'str'},
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'returns': 'SnapshotInfo' }
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##
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# @eject:
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#
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# Ejects a device from a removable drive.
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#
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# @device: Block device name (deprecated, use @id instead)
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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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# Returns: Nothing on success
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#
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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: 0.14.0
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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': 'str',
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'*id': 'str',
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'*force': 'bool' } }
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##
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# @nbd-server-start:
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#
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# Start an NBD server listening on the given host and port. Block
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# devices can then be exported using @nbd-server-add. The NBD
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# server will present them as named exports; for example, another
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# QEMU instance could refer to them as "nbd:HOST:PORT:exportname=NAME".
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#
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# @addr: Address on which to listen.
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# @tls-creds: ID of the TLS credentials object (since 2.6).
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# @tls-authz: ID of the QAuthZ authorization object used to validate
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# the client's x509 distinguished name. This object is
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# is only resolved at time of use, so can be deleted and
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# recreated on the fly while the NBD server is active.
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# If missing, it will default to denying access (since 4.0).
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#
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# Returns: error if the server is already running.
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#
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# Since: 1.3.0
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##
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{ 'command': 'nbd-server-start',
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'data': { 'addr': 'SocketAddressLegacy',
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'*tls-creds': 'str',
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'*tls-authz': 'str'} }
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##
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# @nbd-server-add:
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#
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# Export a block node to QEMU's embedded NBD server.
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#
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# @device: The device name or node name of the node to be exported
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#
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# @name: Export name. If unspecified, the @device parameter is used as the
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# export name. (Since 2.12)
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#
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# @description: Free-form description of the export, up to 4096 bytes.
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# (Since 5.0)
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#
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# @writable: Whether clients should be able to write to the device via the
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# NBD connection (default false).
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#
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# @bitmap: Also export the dirty bitmap reachable from @device, so the
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# NBD client can use NBD_OPT_SET_META_CONTEXT with
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# "qemu:dirty-bitmap:NAME" to inspect the bitmap. (since 4.0)
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#
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# Returns: error if the server is not running, or export with the same name
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# already exists.
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#
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# Since: 1.3.0
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##
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{ 'command': 'nbd-server-add',
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'data': {'device': 'str', '*name': 'str', '*description': 'str',
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'*writable': 'bool', '*bitmap': 'str' } }
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##
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# @NbdServerRemoveMode:
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#
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# Mode for removing an NBD export.
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#
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# @safe: Remove export if there are no existing connections, fail otherwise.
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#
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# @hard: Drop all connections immediately and remove export.
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#
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# Potential additional modes to be added in the future:
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#
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# hide: Just hide export from new clients, leave existing connections as is.
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# Remove export after all clients are disconnected.
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#
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# soft: Hide export from new clients, answer with ESHUTDOWN for all further
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# requests from existing clients.
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#
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# Since: 2.12
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##
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{'enum': 'NbdServerRemoveMode', 'data': ['safe', 'hard']}
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##
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# @nbd-server-remove:
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#
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# Remove NBD export by name.
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#
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# @name: Export name.
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#
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# @mode: Mode of command operation. See @NbdServerRemoveMode description.
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# Default is 'safe'.
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#
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# Returns: error if
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# - the server is not running
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# - export is not found
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# - mode is 'safe' and there are existing connections
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#
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# Since: 2.12
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##
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{ 'command': 'nbd-server-remove',
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'data': {'name': 'str', '*mode': 'NbdServerRemoveMode'} }
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##
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# @nbd-server-stop:
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#
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# Stop QEMU's embedded NBD server, and unregister all devices previously
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# added via @nbd-server-add.
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#
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# Since: 1.3.0
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##
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{ 'command': 'nbd-server-stop' }
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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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# @QuorumOpType:
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#
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# An enumeration of the quorum operation types
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#
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# @read: read operation
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#
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# @write: write operation
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#
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# @flush: flush operation
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#
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# Since: 2.6
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##
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{ 'enum': 'QuorumOpType',
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'data': [ 'read', 'write', 'flush' ] }
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##
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# @QUORUM_FAILURE:
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#
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# Emitted by the Quorum block driver if it fails to establish a quorum
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#
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# @reference: device name if defined else node name
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#
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# @sector-num: number of the first sector of the failed read operation
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#
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# @sectors-count: failed read operation sector count
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#
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# Note: This event is rate-limited.
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#
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# Since: 2.0
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#
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# Example:
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#
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# <- { "event": "QUORUM_FAILURE",
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# "data": { "reference": "usr1", "sector-num": 345435, "sectors-count": 5 },
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# "timestamp": { "seconds": 1344522075, "microseconds": 745528 } }
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#
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##
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{ 'event': 'QUORUM_FAILURE',
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'data': { 'reference': 'str', 'sector-num': 'int', 'sectors-count': 'int' } }
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##
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# @QUORUM_REPORT_BAD:
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#
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# Emitted to report a corruption of a Quorum file
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#
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# @type: quorum operation type (Since 2.6)
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#
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# @error: error message. Only present on failure. This field
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# contains a human-readable error message. There are no semantics other
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# than that the block layer reported an error and clients should not
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# try to interpret the error string.
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#
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# @node-name: the graph node name of the block driver state
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#
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# @sector-num: number of the first sector of the failed read operation
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#
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# @sectors-count: failed read operation sector count
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#
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# Note: This event is rate-limited.
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#
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# Since: 2.0
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#
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# Example:
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#
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# 1. Read operation
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#
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# { "event": "QUORUM_REPORT_BAD",
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# "data": { "node-name": "node0", "sector-num": 345435, "sectors-count": 5,
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# "type": "read" },
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# "timestamp": { "seconds": 1344522075, "microseconds": 745528 } }
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#
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# 2. Flush operation
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#
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# { "event": "QUORUM_REPORT_BAD",
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# "data": { "node-name": "node0", "sector-num": 0, "sectors-count": 2097120,
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# "type": "flush", "error": "Broken pipe" },
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# "timestamp": { "seconds": 1456406829, "microseconds": 291763 } }
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#
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##
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{ 'event': 'QUORUM_REPORT_BAD',
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'data': { 'type': 'QuorumOpType', '*error': 'str', 'node-name': 'str',
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'sector-num': 'int', 'sectors-count': 'int' } }
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