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qemu/qapi/block-core.json
Jean-Louis Dupond b2b109041e qcow2: keep reference on zeroize with discard-no-unref enabled 
When the discard-no-unref flag is enabled, we keep the reference for
normal discard requests.
But when a discard is executed on a snapshot/qcow2 image with backing,
the discards are saved as zero clusters in the snapshot image.

When committing the snapshot to the backing file, not
discard_in_l2_slice is called but zero_in_l2_slice. Which did not had
any logic to keep the reference when discard-no-unref is enabled.

Therefor we add logic in the zero_in_l2_slice call to keep the reference
on commit.

Fixes: https://gitlab.com/qemu-project/qemu/-/issues/1621
Signed-off-by: Jean-Louis Dupond <jean-louis@dupond.be>
Message-Id: <20231003125236.216473-2-jean-louis@dupond.be>
[hreitz: Made the documentation change more verbose, as discussed
         on-list]
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
2023-11-06 16:15:07 +01:00

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# -*- Mode: Python -*-
# vim: filetype=python
##
# == Block core (VM unrelated)
##
{ 'include': 'common.json' }
{ 'include': 'crypto.json' }
{ 'include': 'job.json' }
{ 'include': 'sockets.json' }
##
# @SnapshotInfo:
#
# @id: unique snapshot id
#
# @name: user chosen name
#
# @vm-state-size: size of the VM state
#
# @date-sec: UTC date of the snapshot in seconds
#
# @date-nsec: fractional part in nano seconds to be used with date-sec
#
# @vm-clock-sec: VM clock relative to boot in seconds
#
# @vm-clock-nsec: fractional part in nano seconds to be used with
# vm-clock-sec
#
# @icount: Current instruction count. Appears when execution
# record/replay is enabled. Used for "time-traveling" to match
# the moment in the recorded execution with the snapshots. This
# counter may be obtained through @query-replay command (since
# 5.2)
#
# Since: 1.3
##
{ 'struct': 'SnapshotInfo',
'data': { 'id': 'str', 'name': 'str', 'vm-state-size': 'int',
'date-sec': 'int', 'date-nsec': 'int',
'vm-clock-sec': 'int', 'vm-clock-nsec': 'int',
'*icount': 'int' } }
##
# @ImageInfoSpecificQCow2EncryptionBase:
#
# @format: The encryption format
#
# Since: 2.10
##
{ 'struct': 'ImageInfoSpecificQCow2EncryptionBase',
'data': { 'format': 'BlockdevQcow2EncryptionFormat'}}
##
# @ImageInfoSpecificQCow2Encryption:
#
# Since: 2.10
##
{ 'union': 'ImageInfoSpecificQCow2Encryption',
'base': 'ImageInfoSpecificQCow2EncryptionBase',
'discriminator': 'format',
'data': { 'luks': 'QCryptoBlockInfoLUKS' } }
##
# @ImageInfoSpecificQCow2:
#
# @compat: compatibility level
#
# @data-file: the filename of the external data file that is stored in
# the image and used as a default for opening the image
# (since: 4.0)
#
# @data-file-raw: True if the external data file must stay valid as a
# standalone (read-only) raw image without looking at qcow2
# metadata (since: 4.0)
#
# @extended-l2: true if the image has extended L2 entries; only valid
# for compat >= 1.1 (since 5.2)
#
# @lazy-refcounts: on or off; only valid for compat >= 1.1
#
# @corrupt: true if the image has been marked corrupt; only valid for
# compat >= 1.1 (since 2.2)
#
# @refcount-bits: width of a refcount entry in bits (since 2.3)
#
# @encrypt: details about encryption parameters; only set if image is
# encrypted (since 2.10)
#
# @bitmaps: A list of qcow2 bitmap details (since 4.0)
#
# @compression-type: the image cluster compression method (since 5.1)
#
# Since: 1.7
##
{ 'struct': 'ImageInfoSpecificQCow2',
'data': {
'compat': 'str',
'*data-file': 'str',
'*data-file-raw': 'bool',
'*extended-l2': 'bool',
'*lazy-refcounts': 'bool',
'*corrupt': 'bool',
'refcount-bits': 'int',
'*encrypt': 'ImageInfoSpecificQCow2Encryption',
'*bitmaps': ['Qcow2BitmapInfo'],
'compression-type': 'Qcow2CompressionType'
} }
##
# @ImageInfoSpecificVmdk:
#
# @create-type: The create type of VMDK image
#
# @cid: Content id of image
#
# @parent-cid: Parent VMDK image's cid
#
# @extents: List of extent files
#
# Since: 1.7
##
{ 'struct': 'ImageInfoSpecificVmdk',
'data': {
'create-type': 'str',
'cid': 'int',
'parent-cid': 'int',
'extents': ['VmdkExtentInfo']
} }
##
# @VmdkExtentInfo:
#
# Information about a VMDK extent file
#
# @filename: Name of the extent file
#
# @format: Extent type (e.g. FLAT or SPARSE)
#
# @virtual-size: Number of bytes covered by this extent
#
# @cluster-size: Cluster size in bytes (for non-flat extents)
#
# @compressed: Whether this extent contains compressed data
#
# Since: 8.0
##
{ 'struct': 'VmdkExtentInfo',
'data': {
'filename': 'str',
'format': 'str',
'virtual-size': 'int',
'*cluster-size': 'int',
'*compressed': 'bool'
} }
##
# @ImageInfoSpecificRbd:
#
# @encryption-format: Image encryption format
#
# Since: 6.1
##
{ 'struct': 'ImageInfoSpecificRbd',
'data': {
'*encryption-format': 'RbdImageEncryptionFormat'
} }
##
# @ImageInfoSpecificFile:
#
# @extent-size-hint: Extent size hint (if available)
#
# Since: 8.0
##
{ 'struct': 'ImageInfoSpecificFile',
'data': {
'*extent-size-hint': 'size'
} }
##
# @ImageInfoSpecificKind:
#
# @luks: Since 2.7
#
# @rbd: Since 6.1
#
# @file: Since 8.0
#
# Since: 1.7
##
{ 'enum': 'ImageInfoSpecificKind',
'data': [ 'qcow2', 'vmdk', 'luks', 'rbd', 'file' ] }
##
# @ImageInfoSpecificQCow2Wrapper:
#
# Since: 1.7
##
{ 'struct': 'ImageInfoSpecificQCow2Wrapper',
'data': { 'data': 'ImageInfoSpecificQCow2' } }
##
# @ImageInfoSpecificVmdkWrapper:
#
# Since: 6.1
##
{ 'struct': 'ImageInfoSpecificVmdkWrapper',
'data': { 'data': 'ImageInfoSpecificVmdk' } }
##
# @ImageInfoSpecificLUKSWrapper:
#
# Since: 2.7
##
{ 'struct': 'ImageInfoSpecificLUKSWrapper',
'data': { 'data': 'QCryptoBlockInfoLUKS' } }
# If we need to add block driver specific parameters for
# LUKS in future, then we'll subclass QCryptoBlockInfoLUKS
# to define a ImageInfoSpecificLUKS
##
# @ImageInfoSpecificRbdWrapper:
#
# Since: 6.1
##
{ 'struct': 'ImageInfoSpecificRbdWrapper',
'data': { 'data': 'ImageInfoSpecificRbd' } }
##
# @ImageInfoSpecificFileWrapper:
#
# Since: 8.0
##
{ 'struct': 'ImageInfoSpecificFileWrapper',
'data': { 'data': 'ImageInfoSpecificFile' } }
##
# @ImageInfoSpecific:
#
# A discriminated record of image format specific information
# structures.
#
# Since: 1.7
##
{ 'union': 'ImageInfoSpecific',
'base': { 'type': 'ImageInfoSpecificKind' },
'discriminator': 'type',
'data': {
'qcow2': 'ImageInfoSpecificQCow2Wrapper',
'vmdk': 'ImageInfoSpecificVmdkWrapper',
'luks': 'ImageInfoSpecificLUKSWrapper',
'rbd': 'ImageInfoSpecificRbdWrapper',
'file': 'ImageInfoSpecificFileWrapper'
} }
##
# @BlockNodeInfo:
#
# Information about a QEMU image file
#
# @filename: name of the image file
#
# @format: format of the image file
#
# @virtual-size: maximum capacity in bytes of the image
#
# @actual-size: actual size on disk in bytes of the image
#
# @dirty-flag: true if image is not cleanly closed
#
# @cluster-size: size of a cluster in bytes
#
# @encrypted: true if the image is encrypted
#
# @compressed: true if the image is compressed (Since 1.7)
#
# @backing-filename: name of the backing file
#
# @full-backing-filename: full path of the backing file
#
# @backing-filename-format: the format of the backing file
#
# @snapshots: list of VM snapshots
#
# @format-specific: structure supplying additional format-specific
# information (since 1.7)
#
# Since: 8.0
##
{ 'struct': 'BlockNodeInfo',
'data': {'filename': 'str', 'format': 'str', '*dirty-flag': 'bool',
'*actual-size': 'int', 'virtual-size': 'int',
'*cluster-size': 'int', '*encrypted': 'bool', '*compressed': 'bool',
'*backing-filename': 'str', '*full-backing-filename': 'str',
'*backing-filename-format': 'str', '*snapshots': ['SnapshotInfo'],
'*format-specific': 'ImageInfoSpecific' } }
##
# @ImageInfo:
#
# Information about a QEMU image file, and potentially its backing
# image
#
# @backing-image: info of the backing image
#
# Since: 1.3
##
{ 'struct': 'ImageInfo',
'base': 'BlockNodeInfo',
'data': {
'*backing-image': 'ImageInfo'
} }
##
# @BlockChildInfo:
#
# Information about all nodes in the block graph starting at some
# node, annotated with information about that node in relation to its
# parent.
#
# @name: Child name of the root node in the BlockGraphInfo struct, in
# its role as the child of some undescribed parent node
#
# @info: Block graph information starting at this node
#
# Since: 8.0
##
{ 'struct': 'BlockChildInfo',
'data': {
'name': 'str',
'info': 'BlockGraphInfo'
} }
##
# @BlockGraphInfo:
#
# Information about all nodes in a block (sub)graph in the form of
# BlockNodeInfo data. The base BlockNodeInfo struct contains the
# information for the (sub)graph's root node.
#
# @children: Array of links to this node's child nodes' information
#
# Since: 8.0
##
{ 'struct': 'BlockGraphInfo',
'base': 'BlockNodeInfo',
'data': { 'children': ['BlockChildInfo'] } }
##
# @ImageCheck:
#
# Information about a QEMU image file check
#
# @filename: name of the image file checked
#
# @format: format of the image file checked
#
# @check-errors: number of unexpected errors occurred during check
#
# @image-end-offset: offset (in bytes) where the image ends, this
# field is present if the driver for the image format supports it
#
# @corruptions: number of corruptions found during the check if any
#
# @leaks: number of leaks found during the check if any
#
# @corruptions-fixed: number of corruptions fixed during the check if
# any
#
# @leaks-fixed: number of leaks fixed during the check if any
#
# @total-clusters: total number of clusters, this field is present if
# the driver for the image format supports it
#
# @allocated-clusters: total number of allocated clusters, this field
# is present if the driver for the image format supports it
#
# @fragmented-clusters: total number of fragmented clusters, this
# field is present if the driver for the image format supports it
#
# @compressed-clusters: total number of compressed clusters, this
# field is present if the driver for the image format supports it
#
# Since: 1.4
##
{ 'struct': 'ImageCheck',
'data': {'filename': 'str', 'format': 'str', 'check-errors': 'int',
'*image-end-offset': 'int', '*corruptions': 'int', '*leaks': 'int',
'*corruptions-fixed': 'int', '*leaks-fixed': 'int',
'*total-clusters': 'int', '*allocated-clusters': 'int',
'*fragmented-clusters': 'int', '*compressed-clusters': 'int' } }
##
# @MapEntry:
#
# Mapping information from a virtual block range to a host file range
#
# @start: virtual (guest) offset of the first byte described by this
# entry
#
# @length: the number of bytes of the mapped virtual range
#
# @data: reading the image will actually read data from a file (in
# particular, if @offset is present this means that the sectors
# are not simply preallocated, but contain actual data in raw
# format)
#
# @zero: whether the virtual blocks read as zeroes
#
# @compressed: true if the data is stored compressed (since 8.2)
#
# @depth: number of layers (0 = top image, 1 = top image's backing
# file, ..., n - 1 = bottom image (where n is the number of images
# in the chain)) before reaching one for which the range is
# allocated
#
# @present: true if this layer provides the data, false if adding a
# backing layer could impact this region (since 6.1)
#
# @offset: if present, the image file stores the data for this range
# in raw format at the given (host) offset
#
# @filename: filename that is referred to by @offset
#
# Since: 2.6
##
{ 'struct': 'MapEntry',
'data': {'start': 'int', 'length': 'int', 'data': 'bool',
'zero': 'bool', 'compressed': 'bool', 'depth': 'int',
'present': 'bool', '*offset': 'int', '*filename': 'str' } }
##
# @BlockdevCacheInfo:
#
# Cache mode information for a block device
#
# @writeback: true if writeback mode is enabled
#
# @direct: true if the host page cache is bypassed (O_DIRECT)
#
# @no-flush: true if flush requests are ignored for the device
#
# Since: 2.3
##
{ 'struct': 'BlockdevCacheInfo',
'data': { 'writeback': 'bool',
'direct': 'bool',
'no-flush': 'bool' } }
##
# @BlockDeviceInfo:
#
# Information about the backing device for a block device.
#
# @file: the filename of the backing device
#
# @node-name: the name of the block driver node (Since 2.0)
#
# @ro: true if the backing device was open read-only
#
# @drv: the name of the block format used to open the backing device.
# As of 0.14 this can be: 'blkdebug', 'bochs', 'cloop', 'cow',
# 'dmg', 'file', 'file', 'ftp', 'ftps', 'host_cdrom',
# 'host_device', 'http', 'https', 'luks', 'nbd', 'parallels',
# 'qcow', 'qcow2', 'raw', 'vdi', 'vmdk', 'vpc', 'vvfat' 2.2:
# 'archipelago' added, 'cow' dropped 2.3: 'host_floppy' deprecated
# 2.5: 'host_floppy' dropped 2.6: 'luks' added 2.8: 'replication'
# added, 'tftp' dropped 2.9: 'archipelago' dropped
#
# @backing_file: the name of the backing file (for copy-on-write)
#
# @backing_file_depth: number of files in the backing file chain
# (since: 1.2)
#
# @encrypted: true if the backing device is encrypted
#
# @detect_zeroes: detect and optimize zero writes (Since 2.1)
#
# @bps: total throughput limit in bytes per second is specified
#
# @bps_rd: read throughput limit in bytes per second is specified
#
# @bps_wr: write throughput limit in bytes per second is specified
#
# @iops: total I/O operations per second is specified
#
# @iops_rd: read I/O operations per second is specified
#
# @iops_wr: write I/O operations per second is specified
#
# @image: the info of image used (since: 1.6)
#
# @bps_max: total throughput limit during bursts, in bytes (Since 1.7)
#
# @bps_rd_max: read throughput limit during bursts, in bytes (Since
# 1.7)
#
# @bps_wr_max: write throughput limit during bursts, in bytes (Since
# 1.7)
#
# @iops_max: total I/O operations per second during bursts, in bytes
# (Since 1.7)
#
# @iops_rd_max: read I/O operations per second during bursts, in bytes
# (Since 1.7)
#
# @iops_wr_max: write I/O operations per second during bursts, in
# bytes (Since 1.7)
#
# @bps_max_length: maximum length of the @bps_max burst period, in
# seconds. (Since 2.6)
#
# @bps_rd_max_length: maximum length of the @bps_rd_max burst period,
# in seconds. (Since 2.6)
#
# @bps_wr_max_length: maximum length of the @bps_wr_max burst period,
# in seconds. (Since 2.6)
#
# @iops_max_length: maximum length of the @iops burst period, in
# seconds. (Since 2.6)
#
# @iops_rd_max_length: maximum length of the @iops_rd_max burst
# period, in seconds. (Since 2.6)
#
# @iops_wr_max_length: maximum length of the @iops_wr_max burst
# period, in seconds. (Since 2.6)
#
# @iops_size: an I/O size in bytes (Since 1.7)
#
# @group: throttle group name (Since 2.4)
#
# @cache: the cache mode used for the block device (since: 2.3)
#
# @write_threshold: configured write threshold for the device. 0 if
# disabled. (Since 2.3)
#
# @dirty-bitmaps: dirty bitmaps information (only present if node has
# one or more dirty bitmaps) (Since 4.2)
#
# Since: 0.14
##
{ 'struct': 'BlockDeviceInfo',
'data': { 'file': 'str', '*node-name': 'str', 'ro': 'bool', 'drv': 'str',
'*backing_file': 'str', 'backing_file_depth': 'int',
'encrypted': 'bool',
'detect_zeroes': 'BlockdevDetectZeroesOptions',
'bps': 'int', 'bps_rd': 'int', 'bps_wr': 'int',
'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int',
'image': 'ImageInfo',
'*bps_max': 'int', '*bps_rd_max': 'int',
'*bps_wr_max': 'int', '*iops_max': 'int',
'*iops_rd_max': 'int', '*iops_wr_max': 'int',
'*bps_max_length': 'int', '*bps_rd_max_length': 'int',
'*bps_wr_max_length': 'int', '*iops_max_length': 'int',
'*iops_rd_max_length': 'int', '*iops_wr_max_length': 'int',
'*iops_size': 'int', '*group': 'str', 'cache': 'BlockdevCacheInfo',
'write_threshold': 'int', '*dirty-bitmaps': ['BlockDirtyInfo'] } }
##
# @BlockDeviceIoStatus:
#
# An enumeration of block device I/O status.
#
# @ok: The last I/O operation has succeeded
#
# @failed: The last I/O operation has failed
#
# @nospace: The last I/O operation has failed due to a no-space
# condition
#
# Since: 1.0
##
{ 'enum': 'BlockDeviceIoStatus', 'data': [ 'ok', 'failed', 'nospace' ] }
##
# @BlockDirtyInfo:
#
# Block dirty bitmap information.
#
# @name: the name of the dirty bitmap (Since 2.4)
#
# @count: number of dirty bytes according to the dirty bitmap
#
# @granularity: granularity of the dirty bitmap in bytes (since 1.4)
#
# @recording: true if the bitmap is recording new writes from the
# guest. (since 4.0)
#
# @busy: true if the bitmap is in-use by some operation (NBD or jobs)
# and cannot be modified via QMP or used by another operation.
# (since 4.0)
#
# @persistent: true if the bitmap was stored on disk, is scheduled to
# be stored on disk, or both. (since 4.0)
#
# @inconsistent: true if this is a persistent bitmap that was
# improperly stored. Implies @persistent to be true; @recording
# and @busy to be false. This bitmap cannot be used. To remove
# it, use @block-dirty-bitmap-remove. (Since 4.0)
#
# Since: 1.3
##
{ 'struct': 'BlockDirtyInfo',
'data': {'*name': 'str', 'count': 'int', 'granularity': 'uint32',
'recording': 'bool', 'busy': 'bool',
'persistent': 'bool', '*inconsistent': 'bool' } }
##
# @Qcow2BitmapInfoFlags:
#
# An enumeration of flags that a bitmap can report to the user.
#
# @in-use: This flag is set by any process actively modifying the
# qcow2 file, and cleared when the updated bitmap is flushed to
# the qcow2 image. The presence of this flag in an offline image
# means that the bitmap was not saved correctly after its last
# usage, and may contain inconsistent data.
#
# @auto: The bitmap must reflect all changes of the virtual disk by
# any application that would write to this qcow2 file.
#
# Since: 4.0
##
{ 'enum': 'Qcow2BitmapInfoFlags',
'data': ['in-use', 'auto'] }
##
# @Qcow2BitmapInfo:
#
# Qcow2 bitmap information.
#
# @name: the name of the bitmap
#
# @granularity: granularity of the bitmap in bytes
#
# @flags: flags of the bitmap
#
# Since: 4.0
##
{ 'struct': 'Qcow2BitmapInfo',
'data': {'name': 'str', 'granularity': 'uint32',
'flags': ['Qcow2BitmapInfoFlags'] } }
##
# @BlockLatencyHistogramInfo:
#
# Block latency histogram.
#
# @boundaries: list of interval boundary values in nanoseconds, all
# greater than zero and in ascending order. For example, the list
# [10, 50, 100] produces the following histogram intervals: [0,
# 10), [10, 50), [50, 100), [100, +inf).
#
# @bins: list of io request counts corresponding to histogram
# intervals, one more element than @boundaries has. For the
# example above, @bins may be something like [3, 1, 5, 2], and
# corresponding histogram looks like:
#
# ::
#
# 5| *
# 4| *
# 3| * *
# 2| * * *
# 1| * * * *
# +------------------
# 10 50 100
#
# Since: 4.0
##
{ 'struct': 'BlockLatencyHistogramInfo',
'data': {'boundaries': ['uint64'], 'bins': ['uint64'] } }
##
# @BlockInfo:
#
# Block device information. This structure describes a virtual device
# and the backing device associated with it.
#
# @device: The device name associated with the virtual device.
#
# @qdev: The qdev ID, or if no ID is assigned, the QOM path of the
# block device. (since 2.10)
#
# @type: This field is returned only for compatibility reasons, it
# should not be used (always returns 'unknown')
#
# @removable: True if the device supports removable media.
#
# @locked: True if the guest has locked this device from having its
# media removed
#
# @tray_open: True if the device's tray is open (only present if it
# has a tray)
#
# @io-status: @BlockDeviceIoStatus. Only present if the device
# supports it and the VM is configured to stop on errors
# (supported device models: virtio-blk, IDE, SCSI except
# scsi-generic)
#
# @inserted: @BlockDeviceInfo describing the device if media is
# present
#
# Since: 0.14
##
{ 'struct': 'BlockInfo',
'data': {'device': 'str', '*qdev': 'str', 'type': 'str', 'removable': 'bool',
'locked': 'bool', '*inserted': 'BlockDeviceInfo',
'*tray_open': 'bool', '*io-status': 'BlockDeviceIoStatus' } }
##
# @BlockMeasureInfo:
#
# Image file size calculation information. This structure describes
# the size requirements for creating a new image file.
#
# The size requirements depend on the new image file format. File
# size always equals virtual disk size for the 'raw' format, even for
# sparse POSIX files. Compact formats such as 'qcow2' represent
# unallocated and zero regions efficiently so file size may be smaller
# than virtual disk size.
#
# The values are upper bounds that are guaranteed to fit the new image
# file. Subsequent modification, such as internal snapshot or further
# bitmap creation, may require additional space and is not covered
# here.
#
# @required: Size required for a new image file, in bytes, when
# copying just allocated guest-visible contents.
#
# @fully-allocated: Image file size, in bytes, once data has been
# written to all sectors, when copying just guest-visible
# contents.
#
# @bitmaps: Additional size required if all the top-level bitmap
# metadata in the source image were to be copied to the
# destination, present only when source and destination both
# support persistent bitmaps. (since 5.1)
#
# Since: 2.10
##
{ 'struct': 'BlockMeasureInfo',
'data': {'required': 'int', 'fully-allocated': 'int', '*bitmaps': 'int'} }
##
# @query-block:
#
# Get a list of BlockInfo for all virtual block devices.
#
# Returns: a list of @BlockInfo describing each virtual block device.
# Filter nodes that were created implicitly are skipped over.
#
# Since: 0.14
#
# Example:
#
# -> { "execute": "query-block" }
# <- {
# "return":[
# {
# "io-status": "ok",
# "device":"ide0-hd0",
# "locked":false,
# "removable":false,
# "inserted":{
# "ro":false,
# "drv":"qcow2",
# "encrypted":false,
# "file":"disks/test.qcow2",
# "backing_file_depth":1,
# "bps":1000000,
# "bps_rd":0,
# "bps_wr":0,
# "iops":1000000,
# "iops_rd":0,
# "iops_wr":0,
# "bps_max": 8000000,
# "bps_rd_max": 0,
# "bps_wr_max": 0,
# "iops_max": 0,
# "iops_rd_max": 0,
# "iops_wr_max": 0,
# "iops_size": 0,
# "detect_zeroes": "on",
# "write_threshold": 0,
# "image":{
# "filename":"disks/test.qcow2",
# "format":"qcow2",
# "virtual-size":2048000,
# "backing_file":"base.qcow2",
# "full-backing-filename":"disks/base.qcow2",
# "backing-filename-format":"qcow2",
# "snapshots":[
# {
# "id": "1",
# "name": "snapshot1",
# "vm-state-size": 0,
# "date-sec": 10000200,
# "date-nsec": 12,
# "vm-clock-sec": 206,
# "vm-clock-nsec": 30
# }
# ],
# "backing-image":{
# "filename":"disks/base.qcow2",
# "format":"qcow2",
# "virtual-size":2048000
# }
# }
# },
# "qdev": "ide_disk",
# "type":"unknown"
# },
# {
# "io-status": "ok",
# "device":"ide1-cd0",
# "locked":false,
# "removable":true,
# "qdev": "/machine/unattached/device[23]",
# "tray_open": false,
# "type":"unknown"
# },
# {
# "device":"floppy0",
# "locked":false,
# "removable":true,
# "qdev": "/machine/unattached/device[20]",
# "type":"unknown"
# },
# {
# "device":"sd0",
# "locked":false,
# "removable":true,
# "type":"unknown"
# }
# ]
# }
##
{ 'command': 'query-block', 'returns': ['BlockInfo'],
'allow-preconfig': true }
##
# @BlockDeviceTimedStats:
#
# Statistics of a block device during a given interval of time.
#
# @interval_length: Interval used for calculating the statistics, in
# seconds.
#
# @min_rd_latency_ns: Minimum latency of read operations in the
# defined interval, in nanoseconds.
#
# @min_wr_latency_ns: Minimum latency of write operations in the
# defined interval, in nanoseconds.
#
# @min_zone_append_latency_ns: Minimum latency of zone append
# operations in the defined interval, in nanoseconds (since 8.1)
#
# @min_flush_latency_ns: Minimum latency of flush operations in the
# defined interval, in nanoseconds.
#
# @max_rd_latency_ns: Maximum latency of read operations in the
# defined interval, in nanoseconds.
#
# @max_wr_latency_ns: Maximum latency of write operations in the
# defined interval, in nanoseconds.
#
# @max_zone_append_latency_ns: Maximum latency of zone append
# operations in the defined interval, in nanoseconds (since 8.1)
#
# @max_flush_latency_ns: Maximum latency of flush operations in the
# defined interval, in nanoseconds.
#
# @avg_rd_latency_ns: Average latency of read operations in the
# defined interval, in nanoseconds.
#
# @avg_wr_latency_ns: Average latency of write operations in the
# defined interval, in nanoseconds.
#
# @avg_zone_append_latency_ns: Average latency of zone append
# operations in the defined interval, in nanoseconds (since 8.1)
#
# @avg_flush_latency_ns: Average latency of flush operations in the
# defined interval, in nanoseconds.
#
# @avg_rd_queue_depth: Average number of pending read operations in
# the defined interval.
#
# @avg_wr_queue_depth: Average number of pending write operations in
# the defined interval.
#
# @avg_zone_append_queue_depth: Average number of pending zone append
# operations in the defined interval (since 8.1).
#
# Since: 2.5
##
{ 'struct': 'BlockDeviceTimedStats',
'data': { 'interval_length': 'int', 'min_rd_latency_ns': 'int',
'max_rd_latency_ns': 'int', 'avg_rd_latency_ns': 'int',
'min_wr_latency_ns': 'int', 'max_wr_latency_ns': 'int',
'avg_wr_latency_ns': 'int', 'min_zone_append_latency_ns': 'int',
'max_zone_append_latency_ns': 'int',
'avg_zone_append_latency_ns': 'int',
'min_flush_latency_ns': 'int', 'max_flush_latency_ns': 'int',
'avg_flush_latency_ns': 'int', 'avg_rd_queue_depth': 'number',
'avg_wr_queue_depth': 'number',
'avg_zone_append_queue_depth': 'number' } }
##
# @BlockDeviceStats:
#
# Statistics of a virtual block device or a block backing device.
#
# @rd_bytes: The number of bytes read by the device.
#
# @wr_bytes: The number of bytes written by the device.
#
# @zone_append_bytes: The number of bytes appended by the zoned
# devices (since 8.1)
#
# @unmap_bytes: The number of bytes unmapped by the device (Since 4.2)
#
# @rd_operations: The number of read operations performed by the
# device.
#
# @wr_operations: The number of write operations performed by the
# device.
#
# @zone_append_operations: The number of zone append operations
# performed by the zoned devices (since 8.1)
#
# @flush_operations: The number of cache flush operations performed by
# the device (since 0.15)
#
# @unmap_operations: The number of unmap operations performed by the
# device (Since 4.2)
#
# @rd_total_time_ns: Total time spent on reads in nanoseconds (since
# 0.15).
#
# @wr_total_time_ns: Total time spent on writes in nanoseconds (since
# 0.15).
#
# @zone_append_total_time_ns: Total time spent on zone append writes
# in nanoseconds (since 8.1)
#
# @flush_total_time_ns: Total time spent on cache flushes in
# nanoseconds (since 0.15).
#
# @unmap_total_time_ns: Total time spent on unmap operations in
# nanoseconds (Since 4.2)
#
# @wr_highest_offset: The offset after the greatest byte written to
# the device. The intended use of this information is for
# growable sparse files (like qcow2) that are used on top of a
# physical device.
#
# @rd_merged: Number of read requests that have been merged into
# another request (Since 2.3).
#
# @wr_merged: Number of write requests that have been merged into
# another request (Since 2.3).
#
# @zone_append_merged: Number of zone append requests that have been
# merged into another request (since 8.1)
#
# @unmap_merged: Number of unmap requests that have been merged into
# another request (Since 4.2)
#
# @idle_time_ns: Time since the last I/O operation, in nanoseconds.
# If the field is absent it means that there haven't been any
# operations yet (Since 2.5).
#
# @failed_rd_operations: The number of failed read operations
# performed by the device (Since 2.5)
#
# @failed_wr_operations: The number of failed write operations
# performed by the device (Since 2.5)
#
# @failed_zone_append_operations: The number of failed zone append
# write operations performed by the zoned devices (since 8.1)
#
# @failed_flush_operations: The number of failed flush operations
# performed by the device (Since 2.5)
#
# @failed_unmap_operations: The number of failed unmap operations
# performed by the device (Since 4.2)
#
# @invalid_rd_operations: The number of invalid read operations
# performed by the device (Since 2.5)
#
# @invalid_wr_operations: The number of invalid write operations
# performed by the device (Since 2.5)
#
# @invalid_zone_append_operations: The number of invalid zone append
# operations performed by the zoned device (since 8.1)
#
# @invalid_flush_operations: The number of invalid flush operations
# performed by the device (Since 2.5)
#
# @invalid_unmap_operations: The number of invalid unmap operations
# performed by the device (Since 4.2)
#
# @account_invalid: Whether invalid operations are included in the
# last access statistics (Since 2.5)
#
# @account_failed: Whether failed operations are included in the
# latency and last access statistics (Since 2.5)
#
# @timed_stats: Statistics specific to the set of previously defined
# intervals of time (Since 2.5)
#
# @rd_latency_histogram: @BlockLatencyHistogramInfo. (Since 4.0)
#
# @wr_latency_histogram: @BlockLatencyHistogramInfo. (Since 4.0)
#
# @zone_append_latency_histogram: @BlockLatencyHistogramInfo.
# (since 8.1)
#
# @flush_latency_histogram: @BlockLatencyHistogramInfo. (Since 4.0)
#
# Since: 0.14
##
{ 'struct': 'BlockDeviceStats',
'data': {'rd_bytes': 'int', 'wr_bytes': 'int', 'zone_append_bytes': 'int',
'unmap_bytes' : 'int', 'rd_operations': 'int',
'wr_operations': 'int', 'zone_append_operations': 'int',
'flush_operations': 'int', 'unmap_operations': 'int',
'rd_total_time_ns': 'int', 'wr_total_time_ns': 'int',
'zone_append_total_time_ns': 'int', 'flush_total_time_ns': 'int',
'unmap_total_time_ns': 'int', 'wr_highest_offset': 'int',
'rd_merged': 'int', 'wr_merged': 'int', 'zone_append_merged': 'int',
'unmap_merged': 'int', '*idle_time_ns': 'int',
'failed_rd_operations': 'int', 'failed_wr_operations': 'int',
'failed_zone_append_operations': 'int',
'failed_flush_operations': 'int',
'failed_unmap_operations': 'int', 'invalid_rd_operations': 'int',
'invalid_wr_operations': 'int',
'invalid_zone_append_operations': 'int',
'invalid_flush_operations': 'int', 'invalid_unmap_operations': 'int',
'account_invalid': 'bool', 'account_failed': 'bool',
'timed_stats': ['BlockDeviceTimedStats'],
'*rd_latency_histogram': 'BlockLatencyHistogramInfo',
'*wr_latency_histogram': 'BlockLatencyHistogramInfo',
'*zone_append_latency_histogram': 'BlockLatencyHistogramInfo',
'*flush_latency_histogram': 'BlockLatencyHistogramInfo' } }
##
# @BlockStatsSpecificFile:
#
# File driver statistics
#
# @discard-nb-ok: The number of successful discard operations
# performed by the driver.
#
# @discard-nb-failed: The number of failed discard operations
# performed by the driver.
#
# @discard-bytes-ok: The number of bytes discarded by the driver.
#
# Since: 4.2
##
{ 'struct': 'BlockStatsSpecificFile',
'data': {
'discard-nb-ok': 'uint64',
'discard-nb-failed': 'uint64',
'discard-bytes-ok': 'uint64' } }
##
# @BlockStatsSpecificNvme:
#
# NVMe driver statistics
#
# @completion-errors: The number of completion errors.
#
# @aligned-accesses: The number of aligned accesses performed by the
# driver.
#
# @unaligned-accesses: The number of unaligned accesses performed by
# the driver.
#
# Since: 5.2
##
{ 'struct': 'BlockStatsSpecificNvme',
'data': {
'completion-errors': 'uint64',
'aligned-accesses': 'uint64',
'unaligned-accesses': 'uint64' } }
##
# @BlockStatsSpecific:
#
# Block driver specific statistics
#
# Since: 4.2
##
{ 'union': 'BlockStatsSpecific',
'base': { 'driver': 'BlockdevDriver' },
'discriminator': 'driver',
'data': {
'file': 'BlockStatsSpecificFile',
'host_device': { 'type': 'BlockStatsSpecificFile',
'if': 'HAVE_HOST_BLOCK_DEVICE' },
'nvme': 'BlockStatsSpecificNvme' } }
##
# @BlockStats:
#
# Statistics of a virtual block device or a block backing device.
#
# @device: If the stats are for a virtual block device, the name
# corresponding to the virtual block device.
#
# @node-name: The node name of the device. (Since 2.3)
#
# @qdev: The qdev ID, or if no ID is assigned, the QOM path of the
# block device. (since 3.0)
#
# @stats: A @BlockDeviceStats for the device.
#
# @driver-specific: Optional driver-specific stats. (Since 4.2)
#
# @parent: This describes the file block device if it has one.
# Contains recursively the statistics of the underlying protocol
# (e.g. the host file for a qcow2 image). If there is no
# underlying protocol, this field is omitted
#
# @backing: This describes the backing block device if it has one.
# (Since 2.0)
#
# Since: 0.14
##
{ 'struct': 'BlockStats',
'data': {'*device': 'str', '*qdev': 'str', '*node-name': 'str',
'stats': 'BlockDeviceStats',
'*driver-specific': 'BlockStatsSpecific',
'*parent': 'BlockStats',
'*backing': 'BlockStats'} }
##
# @query-blockstats:
#
# Query the @BlockStats for all virtual block devices.
#
# @query-nodes: If true, the command will query all the block nodes
# that have a node name, in a list which will include "parent"
# information, but not "backing". If false or omitted, the
# behavior is as before - query all the device backends,
# recursively including their "parent" and "backing". Filter nodes
# that were created implicitly are skipped over in this mode.
# (Since 2.3)
#
# Returns: A list of @BlockStats for each virtual block devices.
#
# Since: 0.14
#
# Example:
#
# -> { "execute": "query-blockstats" }
# <- {
# "return":[
# {
# "device":"ide0-hd0",
# "parent":{
# "stats":{
# "wr_highest_offset":3686448128,
# "wr_bytes":9786368,
# "wr_operations":751,
# "rd_bytes":122567168,
# "rd_operations":36772
# "wr_total_times_ns":313253456
# "rd_total_times_ns":3465673657
# "flush_total_times_ns":49653
# "flush_operations":61,
# "rd_merged":0,
# "wr_merged":0,
# "idle_time_ns":2953431879,
# "account_invalid":true,
# "account_failed":false
# }
# },
# "stats":{
# "wr_highest_offset":2821110784,
# "wr_bytes":9786368,
# "wr_operations":692,
# "rd_bytes":122739200,
# "rd_operations":36604
# "flush_operations":51,
# "wr_total_times_ns":313253456
# "rd_total_times_ns":3465673657
# "flush_total_times_ns":49653,
# "rd_merged":0,
# "wr_merged":0,
# "idle_time_ns":2953431879,
# "account_invalid":true,
# "account_failed":false
# },
# "qdev": "/machine/unattached/device[23]"
# },
# {
# "device":"ide1-cd0",
# "stats":{
# "wr_highest_offset":0,
# "wr_bytes":0,
# "wr_operations":0,
# "rd_bytes":0,
# "rd_operations":0
# "flush_operations":0,
# "wr_total_times_ns":0
# "rd_total_times_ns":0
# "flush_total_times_ns":0,
# "rd_merged":0,
# "wr_merged":0,
# "account_invalid":false,
# "account_failed":false
# },
# "qdev": "/machine/unattached/device[24]"
# },
# {
# "device":"floppy0",
# "stats":{
# "wr_highest_offset":0,
# "wr_bytes":0,
# "wr_operations":0,
# "rd_bytes":0,
# "rd_operations":0
# "flush_operations":0,
# "wr_total_times_ns":0
# "rd_total_times_ns":0
# "flush_total_times_ns":0,
# "rd_merged":0,
# "wr_merged":0,
# "account_invalid":false,
# "account_failed":false
# },
# "qdev": "/machine/unattached/device[16]"
# },
# {
# "device":"sd0",
# "stats":{
# "wr_highest_offset":0,
# "wr_bytes":0,
# "wr_operations":0,
# "rd_bytes":0,
# "rd_operations":0
# "flush_operations":0,
# "wr_total_times_ns":0
# "rd_total_times_ns":0
# "flush_total_times_ns":0,
# "rd_merged":0,
# "wr_merged":0,
# "account_invalid":false,
# "account_failed":false
# }
# }
# ]
# }
##
{ 'command': 'query-blockstats',
'data': { '*query-nodes': 'bool' },
'returns': ['BlockStats'],
'allow-preconfig': true }
##
# @BlockdevOnError:
#
# An enumeration of possible behaviors for errors on I/O operations.
# The exact meaning depends on whether the I/O was initiated by a
# guest or by a block job
#
# @report: for guest operations, report the error to the guest; for
# jobs, cancel the job
#
# @ignore: ignore the error, only report a QMP event (BLOCK_IO_ERROR
# or BLOCK_JOB_ERROR). The backup, mirror and commit block jobs
# retry the failing request later and may still complete
# successfully. The stream block job continues to stream and will
# complete with an error.
#
# @enospc: same as @stop on ENOSPC, same as @report otherwise.
#
# @stop: for guest operations, stop the virtual machine; for jobs,
# pause the job
#
# @auto: inherit the error handling policy of the backend (since: 2.7)
#
# Since: 1.3
##
{ 'enum': 'BlockdevOnError',
'data': ['report', 'ignore', 'enospc', 'stop', 'auto'] }
##
# @MirrorSyncMode:
#
# An enumeration of possible behaviors for the initial synchronization
# phase of storage mirroring.
#
# @top: copies data in the topmost image to the destination
#
# @full: copies data from all images to the destination
#
# @none: only copy data written from now on
#
# @incremental: only copy data described by the dirty bitmap.
# (since: 2.4)
#
# @bitmap: only copy data described by the dirty bitmap. (since: 4.2)
# Behavior on completion is determined by the BitmapSyncMode.
#
# Since: 1.3
##
{ 'enum': 'MirrorSyncMode',
'data': ['top', 'full', 'none', 'incremental', 'bitmap'] }
##
# @BitmapSyncMode:
#
# An enumeration of possible behaviors for the synchronization of a
# bitmap when used for data copy operations.
#
# @on-success: The bitmap is only synced when the operation is
# successful. This is the behavior always used for 'INCREMENTAL'
# backups.
#
# @never: The bitmap is never synchronized with the operation, and is
# treated solely as a read-only manifest of blocks to copy.
#
# @always: The bitmap is always synchronized with the operation,
# regardless of whether or not the operation was successful.
#
# Since: 4.2
##
{ 'enum': 'BitmapSyncMode',
'data': ['on-success', 'never', 'always'] }
##
# @MirrorCopyMode:
#
# An enumeration whose values tell the mirror block job when to
# trigger writes to the target.
#
# @background: copy data in background only.
#
# @write-blocking: when data is written to the source, write it
# (synchronously) to the target as well. In addition, data is
# copied in background just like in @background mode.
#
# Since: 3.0
##
{ 'enum': 'MirrorCopyMode',
'data': ['background', 'write-blocking'] }
##
# @BlockJobInfoMirror:
#
# Information specific to mirror block jobs.
#
# @actively-synced: Whether the source is actively synced to the
# target, i.e. same data and new writes are done synchronously to
# both.
#
# Since 8.2
##
{ 'struct': 'BlockJobInfoMirror',
'data': { 'actively-synced': 'bool' } }
##
# @BlockJobInfo:
#
# Information about a long-running block device operation.
#
# @type: the job type ('stream' for image streaming)
#
# @device: The job identifier. Originally the device name but other
# values are allowed since QEMU 2.7
#
# @len: Estimated @offset value at the completion of the job. This
# value can arbitrarily change while the job is running, in both
# directions.
#
# @offset: Progress made until now. The unit is arbitrary and the
# value can only meaningfully be used for the ratio of @offset to
# @len. The value is monotonically increasing.
#
# @busy: false if the job is known to be in a quiescent state, with no
# pending I/O. (Since 1.3)
#
# @paused: whether the job is paused or, if @busy is true, will pause
# itself as soon as possible. (Since 1.3)
#
# @speed: the rate limit, bytes per second
#
# @io-status: the status of the job (since 1.3)
#
# @ready: true if the job may be completed (since 2.2)
#
# @status: Current job state/status (since 2.12)
#
# @auto-finalize: Job will finalize itself when PENDING, moving to the
# CONCLUDED state. (since 2.12)
#
# @auto-dismiss: Job will dismiss itself when CONCLUDED, moving to the
# NULL state and disappearing from the query list. (since 2.12)
#
# @error: Error information if the job did not complete successfully.
# Not set if the job completed successfully. (since 2.12.1)
#
# Since: 1.1
##
{ 'union': 'BlockJobInfo',
'base': {'type': 'JobType', 'device': 'str', 'len': 'int',
'offset': 'int', 'busy': 'bool', 'paused': 'bool', 'speed': 'int',
'io-status': 'BlockDeviceIoStatus', 'ready': 'bool',
'status': 'JobStatus',
'auto-finalize': 'bool', 'auto-dismiss': 'bool',
'*error': 'str' },
'discriminator': 'type',
'data': { 'mirror': 'BlockJobInfoMirror' } }
##
# @query-block-jobs:
#
# Return information about long-running block device operations.
#
# Returns: a list of @BlockJobInfo for each active block job
#
# Since: 1.1
##
{ 'command': 'query-block-jobs', 'returns': ['BlockJobInfo'],
'allow-preconfig': true }
##
# @block_resize:
#
# Resize a block image while a guest is running.
#
# Either @device or @node-name must be set but not both.
#
# @device: the name of the device to get the image resized
#
# @node-name: graph node name to get the image resized (Since 2.0)
#
# @size: new image size in bytes
#
# Returns:
# - nothing on success
# - If @device is not a valid block device, DeviceNotFound
#
# Since: 0.14
#
# Example:
#
# -> { "execute": "block_resize",
# "arguments": { "device": "scratch", "size": 1073741824 } }
# <- { "return": {} }
##
{ 'command': 'block_resize',
'data': { '*device': 'str',
'*node-name': 'str',
'size': 'int' },
'coroutine': true,
'allow-preconfig': true }
##
# @NewImageMode:
#
# An enumeration that tells QEMU how to set the backing file path in a
# new image file.
#
# @existing: QEMU should look for an existing image file.
#
# @absolute-paths: QEMU should create a new image with absolute paths
# for the backing file. If there is no backing file available,
# the new image will not be backed either.
#
# Since: 1.1
##
{ 'enum': 'NewImageMode',
'data': [ 'existing', 'absolute-paths' ] }
##
# @BlockdevSnapshotSync:
#
# Either @device or @node-name must be set but not both.
#
# @device: the name of the device to take a snapshot of.
#
# @node-name: graph node name to generate the snapshot from (Since
# 2.0)
#
# @snapshot-file: the target of the new overlay image. If the file
# exists, or if it is a device, the overlay will be created in the
# existing file/device. Otherwise, a new file will be created.
#
# @snapshot-node-name: the graph node name of the new image (Since
# 2.0)
#
# @format: the format of the overlay image, default is 'qcow2'.
#
# @mode: whether and how QEMU should create a new image, default is
# 'absolute-paths'.
##
{ 'struct': 'BlockdevSnapshotSync',
'data': { '*device': 'str', '*node-name': 'str',
'snapshot-file': 'str', '*snapshot-node-name': 'str',
'*format': 'str', '*mode': 'NewImageMode' } }
##
# @BlockdevSnapshot:
#
# @node: device or node name that will have a snapshot taken.
#
# @overlay: reference to the existing block device that will become
# the overlay of @node, as part of taking the snapshot. It must
# not have a current backing file (this can be achieved by passing
# "backing": null to blockdev-add).
#
# Since: 2.5
##
{ 'struct': 'BlockdevSnapshot',
'data': { 'node': 'str', 'overlay': 'str' } }
##
# @BackupPerf:
#
# Optional parameters for backup. These parameters don't affect
# functionality, but may significantly affect performance.
#
# @use-copy-range: Use copy offloading. Default false.
#
# @max-workers: Maximum number of parallel requests for the sustained
# background copying process. Doesn't influence copy-before-write
# operations. Default 64.
#
# @max-chunk: Maximum request length for the sustained background
# copying process. Doesn't influence copy-before-write
# operations. 0 means unlimited. If max-chunk is non-zero then
# it should not be less than job cluster size which is calculated
# as maximum of target image cluster size and 64k. Default 0.
#
# Since: 6.0
##
{ 'struct': 'BackupPerf',
'data': { '*use-copy-range': 'bool',
'*max-workers': 'int', '*max-chunk': 'int64' } }
##
# @BackupCommon:
#
# @job-id: identifier for the newly-created block job. If omitted,
# the device name will be used. (Since 2.7)
#
# @device: the device name or node-name of a root node which should be
# copied.
#
# @sync: what parts of the disk image should be copied to the
# destination (all the disk, only the sectors allocated in the
# topmost image, from a dirty bitmap, or only new I/O).
#
# @speed: the maximum speed, in bytes per second. The default is 0,
# for unlimited.
#
# @bitmap: The name of a dirty bitmap to use. Must be present if sync
# is "bitmap" or "incremental". Can be present if sync is "full"
# or "top". Must not be present otherwise.
# (Since 2.4 (drive-backup), 3.1 (blockdev-backup))
#
# @bitmap-mode: Specifies the type of data the bitmap should contain
# after the operation concludes. Must be present if a bitmap was
# provided, Must NOT be present otherwise. (Since 4.2)
#
# @compress: true to compress data, if the target format supports it.
# (default: false) (since 2.8)
#
# @on-source-error: the action to take on an error on the source,
# default 'report'. 'stop' and 'enospc' can only be used if the
# block device supports io-status (see BlockInfo).
#
# @on-target-error: the action to take on an error on the target,
# default 'report' (no limitations, since this applies to a
# different block device than @device).
#
# @auto-finalize: When false, this job will wait in a PENDING state
# after it has finished its work, waiting for @block-job-finalize
# before making any block graph changes. When true, this job will
# automatically perform its abort or commit actions. Defaults to
# true. (Since 2.12)
#
# @auto-dismiss: When false, this job will wait in a CONCLUDED state
# after it has completely ceased all work, and awaits
# @block-job-dismiss. When true, this job will automatically
# disappear from the query list without user intervention.
# Defaults to true. (Since 2.12)
#
# @filter-node-name: the node name that should be assigned to the
# filter driver that the backup job inserts into the graph above
# node specified by @drive. If this option is not given, a node
# name is autogenerated. (Since: 4.2)
#
# @x-perf: Performance options. (Since 6.0)
#
# Features:
#
# @unstable: Member @x-perf is experimental.
#
# Note: @on-source-error and @on-target-error only affect background
# I/O. If an error occurs during a guest write request, the
# device's rerror/werror actions will be used.
#
# Since: 4.2
##
{ 'struct': 'BackupCommon',
'data': { '*job-id': 'str', 'device': 'str',
'sync': 'MirrorSyncMode', '*speed': 'int',
'*bitmap': 'str', '*bitmap-mode': 'BitmapSyncMode',
'*compress': 'bool',
'*on-source-error': 'BlockdevOnError',
'*on-target-error': 'BlockdevOnError',
'*auto-finalize': 'bool', '*auto-dismiss': 'bool',
'*filter-node-name': 'str',
'*x-perf': { 'type': 'BackupPerf',
'features': [ 'unstable' ] } } }
##
# @DriveBackup:
#
# @target: the target of the new image. If the file exists, or if it
# is a device, the existing file/device will be used as the new
# destination. If it does not exist, a new file will be created.
#
# @format: the format of the new destination, default is to probe if
# @mode is 'existing', else the format of the source
#
# @mode: whether and how QEMU should create a new image, default is
# 'absolute-paths'.
#
# Since: 1.6
##
{ 'struct': 'DriveBackup',
'base': 'BackupCommon',
'data': { 'target': 'str',
'*format': 'str',
'*mode': 'NewImageMode' } }
##
# @BlockdevBackup:
#
# @target: the device name or node-name of the backup target node.
#
# Since: 2.3
##
{ 'struct': 'BlockdevBackup',
'base': 'BackupCommon',
'data': { 'target': 'str' } }
##
# @blockdev-snapshot-sync:
#
# Takes a synchronous snapshot of a block device.
#
# For the arguments, see the documentation of BlockdevSnapshotSync.
#
# Returns:
# - nothing on success
# - If @device is not a valid block device, DeviceNotFound
#
# Since: 0.14
#
# Example:
#
# -> { "execute": "blockdev-snapshot-sync",
# "arguments": { "device": "ide-hd0",
# "snapshot-file":
# "/some/place/my-image",
# "format": "qcow2" } }
# <- { "return": {} }
##
{ 'command': 'blockdev-snapshot-sync',
'data': 'BlockdevSnapshotSync',
'allow-preconfig': true }
##
# @blockdev-snapshot:
#
# Takes a snapshot of a block device.
#
# Take a snapshot, by installing 'node' as the backing image of
# 'overlay'. Additionally, if 'node' is associated with a block
# device, the block device changes to using 'overlay' as its new
# active image.
#
# For the arguments, see the documentation of BlockdevSnapshot.
#
# Features:
#
# @allow-write-only-overlay: If present, the check whether this
# operation is safe was relaxed so that it can be used to change
# backing file of a destination of a blockdev-mirror. (since 5.0)
#
# Since: 2.5
#
# Example:
#
# -> { "execute": "blockdev-add",
# "arguments": { "driver": "qcow2",
# "node-name": "node1534",
# "file": { "driver": "file",
# "filename": "hd1.qcow2" },
# "backing": null } }
#
# <- { "return": {} }
#
# -> { "execute": "blockdev-snapshot",
# "arguments": { "node": "ide-hd0",
# "overlay": "node1534" } }
# <- { "return": {} }
##
{ 'command': 'blockdev-snapshot',
'data': 'BlockdevSnapshot',
'features': [ 'allow-write-only-overlay' ],
'allow-preconfig': true }
##
# @change-backing-file:
#
# Change the backing file in the image file metadata. This does not
# cause QEMU to reopen the image file to reparse the backing filename
# (it may, however, perform a reopen to change permissions from r/o ->
# r/w -> r/o, if needed). The new backing file string is written into
# the image file metadata, and the QEMU internal strings are updated.
#
# @image-node-name: The name of the block driver state node of the
# image to modify. The "device" argument is used to verify
# "image-node-name" is in the chain described by "device".
#
# @device: The device name or node-name of the root node that owns
# image-node-name.
#
# @backing-file: The string to write as the backing file. This string
# is not validated, so care should be taken when specifying the
# string or the image chain may not be able to be reopened again.
#
# Returns:
# - Nothing on success
# - If "device" does not exist or cannot be determined,
# DeviceNotFound
#
# Since: 2.1
##
{ 'command': 'change-backing-file',
'data': { 'device': 'str', 'image-node-name': 'str',
'backing-file': 'str' },
'allow-preconfig': true }
##
# @block-commit:
#
# Live commit of data from overlay image nodes into backing nodes -
# i.e., writes data between 'top' and 'base' into 'base'.
#
# If top == base, that is an error. If top has no overlays on top of
# it, or if it is in use by a writer, the job will not be completed by
# itself. The user needs to complete the job with the
# block-job-complete command after getting the ready event. (Since
# 2.0)
#
# If the base image is smaller than top, then the base image will be
# resized to be the same size as top. If top is smaller than the base
# image, the base will not be truncated. If you want the base image
# size to match the size of the smaller top, you can safely truncate
# it yourself once the commit operation successfully completes.
#
# @job-id: identifier for the newly-created block job. If omitted,
# the device name will be used. (Since 2.7)
#
# @device: the device name or node-name of a root node
#
# @base-node: The node name of the backing image to write data into.
# If not specified, this is the deepest backing image.
# (since: 3.1)
#
# @base: Same as @base-node, except that it is a file name rather than
# a node name. This must be the exact filename string that was
# used to open the node; other strings, even if addressing the
# same file, are not accepted
#
# @top-node: The node name of the backing image within the image chain
# which contains the topmost data to be committed down. If not
# specified, this is the active layer. (since: 3.1)
#
# @top: Same as @top-node, except that it is a file name rather than a
# node name. This must be the exact filename string that was used
# to open the node; other strings, even if addressing the same
# file, are not accepted
#
# @backing-file: The backing file string to write into the overlay
# image of 'top'. If 'top' does not have an overlay image, or if
# 'top' is in use by a writer, specifying a backing file string is
# an error.
#
# This filename is not validated. If a pathname string is such
# that it cannot be resolved by QEMU, that means that subsequent
# QMP or HMP commands must use node-names for the image in
# question, as filename lookup methods will fail.
#
# If not specified, QEMU will automatically determine the backing
# file string to use, or error out if there is no obvious choice.
# Care should be taken when specifying the string, to specify a
# valid filename or protocol. (Since 2.1)
#
# @speed: the maximum speed, in bytes per second
#
# @on-error: the action to take on an error. 'ignore' means that the
# request should be retried. (default: report; Since: 5.0)
#
# @filter-node-name: the node name that should be assigned to the
# filter driver that the commit job inserts into the graph above
# @top. If this option is not given, a node name is
# autogenerated. (Since: 2.9)
#
# @auto-finalize: When false, this job will wait in a PENDING state
# after it has finished its work, waiting for @block-job-finalize
# before making any block graph changes. When true, this job will
# automatically perform its abort or commit actions. Defaults to
# true. (Since 3.1)
#
# @auto-dismiss: When false, this job will wait in a CONCLUDED state
# after it has completely ceased all work, and awaits
# @block-job-dismiss. When true, this job will automatically
# disappear from the query list without user intervention.
# Defaults to true. (Since 3.1)
#
# Features:
#
# @deprecated: Members @base and @top are deprecated. Use @base-node
# and @top-node instead.
#
# Returns:
# - Nothing on success
# - If @device does not exist, DeviceNotFound
# - Any other error returns a GenericError.
#
# Since: 1.3
#
# Example:
#
# -> { "execute": "block-commit",
# "arguments": { "device": "virtio0",
# "top": "/tmp/snap1.qcow2" } }
# <- { "return": {} }
##
{ 'command': 'block-commit',
'data': { '*job-id': 'str', 'device': 'str', '*base-node': 'str',
'*base': { 'type': 'str', 'features': [ 'deprecated' ] },
'*top-node': 'str',
'*top': { 'type': 'str', 'features': [ 'deprecated' ] },
'*backing-file': 'str', '*speed': 'int',
'*on-error': 'BlockdevOnError',
'*filter-node-name': 'str',
'*auto-finalize': 'bool', '*auto-dismiss': 'bool' },
'allow-preconfig': true }
##
# @drive-backup:
#
# Start a point-in-time copy of a block device to a new destination.
# The status of ongoing drive-backup operations can be checked with
# query-block-jobs where the BlockJobInfo.type field has the value
# 'backup'. The operation can be stopped before it has completed using
# the block-job-cancel command.
#
# Features:
#
# @deprecated: This command is deprecated. Use @blockdev-backup
# instead.
#
# Returns:
# - nothing on success
# - If @device is not a valid block device, GenericError
#
# Since: 1.6
#
# Example:
#
# -> { "execute": "drive-backup",
# "arguments": { "device": "drive0",
# "sync": "full",
# "target": "backup.img" } }
# <- { "return": {} }
##
{ 'command': 'drive-backup', 'boxed': true,
'data': 'DriveBackup', 'features': ['deprecated'],
'allow-preconfig': true }
##
# @blockdev-backup:
#
# Start a point-in-time copy of a block device to a new destination.
# The status of ongoing blockdev-backup operations can be checked with
# query-block-jobs where the BlockJobInfo.type field has the value
# 'backup'. The operation can be stopped before it has completed using
# the block-job-cancel command.
#
# Returns:
# - nothing on success
# - If @device is not a valid block device, DeviceNotFound
#
# Since: 2.3
#
# Example:
#
# -> { "execute": "blockdev-backup",
# "arguments": { "device": "src-id",
# "sync": "full",
# "target": "tgt-id" } }
# <- { "return": {} }
##
{ 'command': 'blockdev-backup', 'boxed': true,
'data': 'BlockdevBackup',
'allow-preconfig': true }
##
# @query-named-block-nodes:
#
# Get the named block driver list
#
# @flat: Omit the nested data about backing image ("backing-image"
# key) if true. Default is false (Since 5.0)
#
# Returns: the list of BlockDeviceInfo
#
# Since: 2.0
#
# Example:
#
# -> { "execute": "query-named-block-nodes" }
# <- { "return": [ { "ro":false,
# "drv":"qcow2",
# "encrypted":false,
# "file":"disks/test.qcow2",
# "node-name": "my-node",
# "backing_file_depth":1,
# "detect_zeroes":"off",
# "bps":1000000,
# "bps_rd":0,
# "bps_wr":0,
# "iops":1000000,
# "iops_rd":0,
# "iops_wr":0,
# "bps_max": 8000000,
# "bps_rd_max": 0,
# "bps_wr_max": 0,
# "iops_max": 0,
# "iops_rd_max": 0,
# "iops_wr_max": 0,
# "iops_size": 0,
# "write_threshold": 0,
# "image":{
# "filename":"disks/test.qcow2",
# "format":"qcow2",
# "virtual-size":2048000,
# "backing_file":"base.qcow2",
# "full-backing-filename":"disks/base.qcow2",
# "backing-filename-format":"qcow2",
# "snapshots":[
# {
# "id": "1",
# "name": "snapshot1",
# "vm-state-size": 0,
# "date-sec": 10000200,
# "date-nsec": 12,
# "vm-clock-sec": 206,
# "vm-clock-nsec": 30
# }
# ],
# "backing-image":{
# "filename":"disks/base.qcow2",
# "format":"qcow2",
# "virtual-size":2048000
# }
# } } ] }
##
{ 'command': 'query-named-block-nodes',
'returns': [ 'BlockDeviceInfo' ],
'data': { '*flat': 'bool' },
'allow-preconfig': true }
##
# @XDbgBlockGraphNodeType:
#
# @block-backend: corresponds to BlockBackend
#
# @block-job: corresponds to BlockJob
#
# @block-driver: corresponds to BlockDriverState
#
# Since: 4.0
##
{ 'enum': 'XDbgBlockGraphNodeType',
'data': [ 'block-backend', 'block-job', 'block-driver' ] }
##
# @XDbgBlockGraphNode:
#
# @id: Block graph node identifier. This @id is generated only for
# x-debug-query-block-graph and does not relate to any other
# identifiers in Qemu.
#
# @type: Type of graph node. Can be one of block-backend, block-job
# or block-driver-state.
#
# @name: Human readable name of the node. Corresponds to node-name
# for block-driver-state nodes; is not guaranteed to be unique in
# the whole graph (with block-jobs and block-backends).
#
# Since: 4.0
##
{ 'struct': 'XDbgBlockGraphNode',
'data': { 'id': 'uint64', 'type': 'XDbgBlockGraphNodeType', 'name': 'str' } }
##
# @BlockPermission:
#
# Enum of base block permissions.
#
# @consistent-read: A user that has the "permission" of consistent
# reads is guaranteed that their view of the contents of the block
# device is complete and self-consistent, representing the
# contents of a disk at a specific point. For most block devices
# (including their backing files) this is true, but the property
# cannot be maintained in a few situations like for intermediate
# nodes of a commit block job.
#
# @write: This permission is required to change the visible disk
# contents.
#
# @write-unchanged: This permission (which is weaker than
# BLK_PERM_WRITE) is both enough and required for writes to the
# block node when the caller promises that the visible disk
# content doesn't change. As the BLK_PERM_WRITE permission is
# strictly stronger, either is sufficient to perform an unchanging
# write.
#
# @resize: This permission is required to change the size of a block
# node.
#
# Since: 4.0
##
{ 'enum': 'BlockPermission',
'data': [ 'consistent-read', 'write', 'write-unchanged', 'resize' ] }
##
# @XDbgBlockGraphEdge:
#
# Block Graph edge description for x-debug-query-block-graph.
#
# @parent: parent id
#
# @child: child id
#
# @name: name of the relation (examples are 'file' and 'backing')
#
# @perm: granted permissions for the parent operating on the child
#
# @shared-perm: permissions that can still be granted to other users
# of the child while it is still attached to this parent
#
# Since: 4.0
##
{ 'struct': 'XDbgBlockGraphEdge',
'data': { 'parent': 'uint64', 'child': 'uint64',
'name': 'str', 'perm': [ 'BlockPermission' ],
'shared-perm': [ 'BlockPermission' ] } }
##
# @XDbgBlockGraph:
#
# Block Graph - list of nodes and list of edges.
#
# Since: 4.0
##
{ 'struct': 'XDbgBlockGraph',
'data': { 'nodes': ['XDbgBlockGraphNode'], 'edges': ['XDbgBlockGraphEdge'] } }
##
# @x-debug-query-block-graph:
#
# Get the block graph.
#
# Features:
#
# @unstable: This command is meant for debugging.
#
# Since: 4.0
##
{ 'command': 'x-debug-query-block-graph', 'returns': 'XDbgBlockGraph',
'features': [ 'unstable' ],
'allow-preconfig': true }
##
# @drive-mirror:
#
# Start mirroring a block device's writes to a new destination.
# target specifies the target of the new image. If the file exists,
# or if it is a device, it will be used as the new destination for
# writes. If it does not exist, a new file will be created. format
# specifies the format of the mirror image, default is to probe if
# mode='existing', else the format of the source.
#
# Returns:
# - nothing on success
# - If @device is not a valid block device, GenericError
#
# Since: 1.3
#
# Example:
#
# -> { "execute": "drive-mirror",
# "arguments": { "device": "ide-hd0",
# "target": "/some/place/my-image",
# "sync": "full",
# "format": "qcow2" } }
# <- { "return": {} }
##
{ 'command': 'drive-mirror', 'boxed': true,
'data': 'DriveMirror',
'allow-preconfig': true }
##
# @DriveMirror:
#
# A set of parameters describing drive mirror setup.
#
# @job-id: identifier for the newly-created block job. If omitted,
# the device name will be used. (Since 2.7)
#
# @device: the device name or node-name of a root node whose writes
# should be mirrored.
#
# @target: the target of the new image. If the file exists, or if it
# is a device, the existing file/device will be used as the new
# destination. If it does not exist, a new file will be created.
#
# @format: the format of the new destination, default is to probe if
# @mode is 'existing', else the format of the source
#
# @node-name: the new block driver state node name in the graph (Since
# 2.1)
#
# @replaces: with sync=full graph node name to be replaced by the new
# image when a whole image copy is done. This can be used to
# repair broken Quorum files. By default, @device is replaced,
# although implicitly created filters on it are kept. (Since 2.1)
#
# @mode: whether and how QEMU should create a new image, default is
# 'absolute-paths'.
#
# @speed: the maximum speed, in bytes per second
#
# @sync: what parts of the disk image should be copied to the
# destination (all the disk, only the sectors allocated in the
# topmost image, or only new I/O).
#
# @granularity: granularity of the dirty bitmap, default is 64K if the
# image format doesn't have clusters, 4K if the clusters are
# smaller than that, else the cluster size. Must be a power of 2
# between 512 and 64M (since 1.4).
#
# @buf-size: maximum amount of data in flight from source to target
# (since 1.4).
#
# @on-source-error: the action to take on an error on the source,
# default 'report'. 'stop' and 'enospc' can only be used if the
# block device supports io-status (see BlockInfo).
#
# @on-target-error: the action to take on an error on the target,
# default 'report' (no limitations, since this applies to a
# different block device than @device).
#
# @unmap: Whether to try to unmap target sectors where source has only
# zero. If true, and target unallocated sectors will read as
# zero, target image sectors will be unmapped; otherwise, zeroes
# will be written. Both will result in identical contents.
# Default is true. (Since 2.4)
#
# @copy-mode: when to copy data to the destination; defaults to
# 'background' (Since: 3.0)
#
# @auto-finalize: When false, this job will wait in a PENDING state
# after it has finished its work, waiting for @block-job-finalize
# before making any block graph changes. When true, this job will
# automatically perform its abort or commit actions. Defaults to
# true. (Since 3.1)
#
# @auto-dismiss: When false, this job will wait in a CONCLUDED state
# after it has completely ceased all work, and awaits
# @block-job-dismiss. When true, this job will automatically
# disappear from the query list without user intervention.
# Defaults to true. (Since 3.1)
#
# Since: 1.3
##
{ 'struct': 'DriveMirror',
'data': { '*job-id': 'str', 'device': 'str', 'target': 'str',
'*format': 'str', '*node-name': 'str', '*replaces': 'str',
'sync': 'MirrorSyncMode', '*mode': 'NewImageMode',
'*speed': 'int', '*granularity': 'uint32',
'*buf-size': 'int', '*on-source-error': 'BlockdevOnError',
'*on-target-error': 'BlockdevOnError',
'*unmap': 'bool', '*copy-mode': 'MirrorCopyMode',
'*auto-finalize': 'bool', '*auto-dismiss': 'bool' } }
##
# @BlockDirtyBitmap:
#
# @node: name of device/node which the bitmap is tracking
#
# @name: name of the dirty bitmap
#
# Since: 2.4
##
{ 'struct': 'BlockDirtyBitmap',
'data': { 'node': 'str', 'name': 'str' } }
##
# @BlockDirtyBitmapAdd:
#
# @node: name of device/node which the bitmap is tracking
#
# @name: name of the dirty bitmap (must be less than 1024 bytes)
#
# @granularity: the bitmap granularity, default is 64k for
# block-dirty-bitmap-add
#
# @persistent: the bitmap is persistent, i.e. it will be saved to the
# corresponding block device image file on its close. For now
# only Qcow2 disks support persistent bitmaps. Default is false
# for block-dirty-bitmap-add. (Since: 2.10)
#
# @disabled: the bitmap is created in the disabled state, which means
# that it will not track drive changes. The bitmap may be enabled
# with block-dirty-bitmap-enable. Default is false. (Since: 4.0)
#
# Since: 2.4
##
{ 'struct': 'BlockDirtyBitmapAdd',
'data': { 'node': 'str', 'name': 'str', '*granularity': 'uint32',
'*persistent': 'bool', '*disabled': 'bool' } }
##
# @BlockDirtyBitmapOrStr:
#
# @local: name of the bitmap, attached to the same node as target
# bitmap.
#
# @external: bitmap with specified node
#
# Since: 4.1
##
{ 'alternate': 'BlockDirtyBitmapOrStr',
'data': { 'local': 'str',
'external': 'BlockDirtyBitmap' } }
##
# @BlockDirtyBitmapMerge:
#
# @node: name of device/node which the @target bitmap is tracking
#
# @target: name of the destination dirty bitmap
#
# @bitmaps: name(s) of the source dirty bitmap(s) at @node and/or
# fully specified BlockDirtyBitmap elements. The latter are
# supported since 4.1.
#
# Since: 4.0
##
{ 'struct': 'BlockDirtyBitmapMerge',
'data': { 'node': 'str', 'target': 'str',
'bitmaps': ['BlockDirtyBitmapOrStr'] } }
##
# @block-dirty-bitmap-add:
#
# Create a dirty bitmap with a name on the node, and start tracking
# the writes.
#
# Returns:
# - nothing on success
# - If @node is not a valid block device or node, DeviceNotFound
# - If @name is already taken, GenericError with an explanation
#
# Since: 2.4
#
# Example:
#
# -> { "execute": "block-dirty-bitmap-add",
# "arguments": { "node": "drive0", "name": "bitmap0" } }
# <- { "return": {} }
##
{ 'command': 'block-dirty-bitmap-add',
'data': 'BlockDirtyBitmapAdd',
'allow-preconfig': true }
##
# @block-dirty-bitmap-remove:
#
# Stop write tracking and remove the dirty bitmap that was created
# with block-dirty-bitmap-add. If the bitmap is persistent, remove it
# from its storage too.
#
# Returns:
# - nothing on success
# - If @node is not a valid block device or node, DeviceNotFound
# - If @name is not found, GenericError with an explanation
# - if @name is frozen by an operation, GenericError
#
# Since: 2.4
#
# Example:
#
# -> { "execute": "block-dirty-bitmap-remove",
# "arguments": { "node": "drive0", "name": "bitmap0" } }
# <- { "return": {} }
##
{ 'command': 'block-dirty-bitmap-remove',
'data': 'BlockDirtyBitmap',
'allow-preconfig': true }
##
# @block-dirty-bitmap-clear:
#
# Clear (reset) a dirty bitmap on the device, so that an incremental
# backup from this point in time forward will only backup clusters
# modified after this clear operation.
#
# Returns:
# - nothing on success
# - If @node is not a valid block device, DeviceNotFound
# - If @name is not found, GenericError with an explanation
#
# Since: 2.4
#
# Example:
#
# -> { "execute": "block-dirty-bitmap-clear",
# "arguments": { "node": "drive0", "name": "bitmap0" } }
# <- { "return": {} }
##
{ 'command': 'block-dirty-bitmap-clear',
'data': 'BlockDirtyBitmap',
'allow-preconfig': true }
##
# @block-dirty-bitmap-enable:
#
# Enables a dirty bitmap so that it will begin tracking disk changes.
#
# Returns:
# - nothing on success
# - If @node is not a valid block device, DeviceNotFound
# - If @name is not found, GenericError with an explanation
#
# Since: 4.0
#
# Example:
#
# -> { "execute": "block-dirty-bitmap-enable",
# "arguments": { "node": "drive0", "name": "bitmap0" } }
# <- { "return": {} }
##
{ 'command': 'block-dirty-bitmap-enable',
'data': 'BlockDirtyBitmap',
'allow-preconfig': true }
##
# @block-dirty-bitmap-disable:
#
# Disables a dirty bitmap so that it will stop tracking disk changes.
#
# Returns:
# - nothing on success
# - If @node is not a valid block device, DeviceNotFound
# - If @name is not found, GenericError with an explanation
#
# Since: 4.0
#
# Example:
#
# -> { "execute": "block-dirty-bitmap-disable",
# "arguments": { "node": "drive0", "name": "bitmap0" } }
# <- { "return": {} }
##
{ 'command': 'block-dirty-bitmap-disable',
'data': 'BlockDirtyBitmap',
'allow-preconfig': true }
##
# @block-dirty-bitmap-merge:
#
# Merge dirty bitmaps listed in @bitmaps to the @target dirty bitmap.
# Dirty bitmaps in @bitmaps will be unchanged, except if it also
# appears as the @target bitmap. Any bits already set in @target will
# still be set after the merge, i.e., this operation does not clear
# the target. On error, @target is unchanged.
#
# The resulting bitmap will count as dirty any clusters that were
# dirty in any of the source bitmaps. This can be used to achieve
# backup checkpoints, or in simpler usages, to copy bitmaps.
#
# Returns:
# - nothing on success
# - If @node is not a valid block device, DeviceNotFound
# - If any bitmap in @bitmaps or @target is not found,
# GenericError
# - If any of the bitmaps have different sizes or granularities,
# GenericError
#
# Since: 4.0
#
# Example:
#
# -> { "execute": "block-dirty-bitmap-merge",
# "arguments": { "node": "drive0", "target": "bitmap0",
# "bitmaps": ["bitmap1"] } }
# <- { "return": {} }
##
{ 'command': 'block-dirty-bitmap-merge',
'data': 'BlockDirtyBitmapMerge',
'allow-preconfig': true }
##
# @BlockDirtyBitmapSha256:
#
# SHA256 hash of dirty bitmap data
#
# @sha256: ASCII representation of SHA256 bitmap hash
#
# Since: 2.10
##
{ 'struct': 'BlockDirtyBitmapSha256',
'data': {'sha256': 'str'} }
##
# @x-debug-block-dirty-bitmap-sha256:
#
# Get bitmap SHA256.
#
# Features:
#
# @unstable: This command is meant for debugging.
#
# Returns:
# - BlockDirtyBitmapSha256 on success
# - If @node is not a valid block device, DeviceNotFound
# - If @name is not found or if hashing has failed, GenericError
# with an explanation
#
# Since: 2.10
##
{ 'command': 'x-debug-block-dirty-bitmap-sha256',
'data': 'BlockDirtyBitmap', 'returns': 'BlockDirtyBitmapSha256',
'features': [ 'unstable' ],
'allow-preconfig': true }
##
# @blockdev-mirror:
#
# Start mirroring a block device's writes to a new destination.
#
# @job-id: identifier for the newly-created block job. If omitted,
# the device name will be used. (Since 2.7)
#
# @device: The device name or node-name of a root node whose writes
# should be mirrored.
#
# @target: the id or node-name of the block device to mirror to. This
# mustn't be attached to guest.
#
# @replaces: with sync=full graph node name to be replaced by the new
# image when a whole image copy is done. This can be used to
# repair broken Quorum files. By default, @device is replaced,
# although implicitly created filters on it are kept.
#
# @speed: the maximum speed, in bytes per second
#
# @sync: what parts of the disk image should be copied to the
# destination (all the disk, only the sectors allocated in the
# topmost image, or only new I/O).
#
# @granularity: granularity of the dirty bitmap, default is 64K if the
# image format doesn't have clusters, 4K if the clusters are
# smaller than that, else the cluster size. Must be a power of 2
# between 512 and 64M
#
# @buf-size: maximum amount of data in flight from source to target
#
# @on-source-error: the action to take on an error on the source,
# default 'report'. 'stop' and 'enospc' can only be used if the
# block device supports io-status (see BlockInfo).
#
# @on-target-error: the action to take on an error on the target,
# default 'report' (no limitations, since this applies to a
# different block device than @device).
#
# @filter-node-name: the node name that should be assigned to the
# filter driver that the mirror job inserts into the graph above
# @device. If this option is not given, a node name is
# autogenerated. (Since: 2.9)
#
# @copy-mode: when to copy data to the destination; defaults to
# 'background' (Since: 3.0)
#
# @auto-finalize: When false, this job will wait in a PENDING state
# after it has finished its work, waiting for @block-job-finalize
# before making any block graph changes. When true, this job will
# automatically perform its abort or commit actions. Defaults to
# true. (Since 3.1)
#
# @auto-dismiss: When false, this job will wait in a CONCLUDED state
# after it has completely ceased all work, and awaits
# @block-job-dismiss. When true, this job will automatically
# disappear from the query list without user intervention.
# Defaults to true. (Since 3.1)
#
# Returns: nothing on success.
#
# Since: 2.6
#
# Example:
#
# -> { "execute": "blockdev-mirror",
# "arguments": { "device": "ide-hd0",
# "target": "target0",
# "sync": "full" } }
# <- { "return": {} }
##
{ 'command': 'blockdev-mirror',
'data': { '*job-id': 'str', 'device': 'str', 'target': 'str',
'*replaces': 'str',
'sync': 'MirrorSyncMode',
'*speed': 'int', '*granularity': 'uint32',
'*buf-size': 'int', '*on-source-error': 'BlockdevOnError',
'*on-target-error': 'BlockdevOnError',
'*filter-node-name': 'str',
'*copy-mode': 'MirrorCopyMode',
'*auto-finalize': 'bool', '*auto-dismiss': 'bool' },
'allow-preconfig': true }
##
# @BlockIOThrottle:
#
# A set of parameters describing block throttling.
#
# @device: Block device name
#
# @id: The name or QOM path of the guest device (since: 2.8)
#
# @bps: total throughput limit in bytes per second
#
# @bps_rd: read throughput limit in bytes per second
#
# @bps_wr: write throughput limit in bytes per second
#
# @iops: total I/O operations per second
#
# @iops_rd: read I/O operations per second
#
# @iops_wr: write I/O operations per second
#
# @bps_max: total throughput limit during bursts, in bytes (Since 1.7)
#
# @bps_rd_max: read throughput limit during bursts, in bytes (Since
# 1.7)
#
# @bps_wr_max: write throughput limit during bursts, in bytes (Since
# 1.7)
#
# @iops_max: total I/O operations per second during bursts, in bytes
# (Since 1.7)
#
# @iops_rd_max: read I/O operations per second during bursts, in bytes
# (Since 1.7)
#
# @iops_wr_max: write I/O operations per second during bursts, in
# bytes (Since 1.7)
#
# @bps_max_length: maximum length of the @bps_max burst period, in
# seconds. It must only be set if @bps_max is set as well.
# Defaults to 1. (Since 2.6)
#
# @bps_rd_max_length: maximum length of the @bps_rd_max burst period,
# in seconds. It must only be set if @bps_rd_max is set as well.
# Defaults to 1. (Since 2.6)
#
# @bps_wr_max_length: maximum length of the @bps_wr_max burst period,
# in seconds. It must only be set if @bps_wr_max is set as well.
# Defaults to 1. (Since 2.6)
#
# @iops_max_length: maximum length of the @iops burst period, in
# seconds. It must only be set if @iops_max is set as well.
# Defaults to 1. (Since 2.6)
#
# @iops_rd_max_length: maximum length of the @iops_rd_max burst
# period, in seconds. It must only be set if @iops_rd_max is set
# as well. Defaults to 1. (Since 2.6)
#
# @iops_wr_max_length: maximum length of the @iops_wr_max burst
# period, in seconds. It must only be set if @iops_wr_max is set
# as well. Defaults to 1. (Since 2.6)
#
# @iops_size: an I/O size in bytes (Since 1.7)
#
# @group: throttle group name (Since 2.4)
#
# Features:
#
# @deprecated: Member @device is deprecated. Use @id instead.
#
# Since: 1.1
##
{ 'struct': 'BlockIOThrottle',
'data': { '*device': { 'type': 'str', 'features': [ 'deprecated' ] },
'*id': 'str', 'bps': 'int', 'bps_rd': 'int',
'bps_wr': 'int', 'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int',
'*bps_max': 'int', '*bps_rd_max': 'int',
'*bps_wr_max': 'int', '*iops_max': 'int',
'*iops_rd_max': 'int', '*iops_wr_max': 'int',
'*bps_max_length': 'int', '*bps_rd_max_length': 'int',
'*bps_wr_max_length': 'int', '*iops_max_length': 'int',
'*iops_rd_max_length': 'int', '*iops_wr_max_length': 'int',
'*iops_size': 'int', '*group': 'str' } }
##
# @ThrottleLimits:
#
# Limit parameters for throttling. Since some limit combinations are
# illegal, limits should always be set in one transaction. All fields
# are optional. When setting limits, if a field is missing the
# current value is not changed.
#
# @iops-total: limit total I/O operations per second
#
# @iops-total-max: I/O operations burst
#
# @iops-total-max-length: length of the iops-total-max burst period,
# in seconds It must only be set if @iops-total-max is set as
# well.
#
# @iops-read: limit read operations per second
#
# @iops-read-max: I/O operations read burst
#
# @iops-read-max-length: length of the iops-read-max burst period, in
# seconds It must only be set if @iops-read-max is set as well.
#
# @iops-write: limit write operations per second
#
# @iops-write-max: I/O operations write burst
#
# @iops-write-max-length: length of the iops-write-max burst period,
# in seconds It must only be set if @iops-write-max is set as
# well.
#
# @bps-total: limit total bytes per second
#
# @bps-total-max: total bytes burst
#
# @bps-total-max-length: length of the bps-total-max burst period, in
# seconds. It must only be set if @bps-total-max is set as well.
#
# @bps-read: limit read bytes per second
#
# @bps-read-max: total bytes read burst
#
# @bps-read-max-length: length of the bps-read-max burst period, in
# seconds It must only be set if @bps-read-max is set as well.
#
# @bps-write: limit write bytes per second
#
# @bps-write-max: total bytes write burst
#
# @bps-write-max-length: length of the bps-write-max burst period, in
# seconds It must only be set if @bps-write-max is set as well.
#
# @iops-size: when limiting by iops max size of an I/O in bytes
#
# Since: 2.11
##
{ 'struct': 'ThrottleLimits',
'data': { '*iops-total' : 'int', '*iops-total-max' : 'int',
'*iops-total-max-length' : 'int', '*iops-read' : 'int',
'*iops-read-max' : 'int', '*iops-read-max-length' : 'int',
'*iops-write' : 'int', '*iops-write-max' : 'int',
'*iops-write-max-length' : 'int', '*bps-total' : 'int',
'*bps-total-max' : 'int', '*bps-total-max-length' : 'int',
'*bps-read' : 'int', '*bps-read-max' : 'int',
'*bps-read-max-length' : 'int', '*bps-write' : 'int',
'*bps-write-max' : 'int', '*bps-write-max-length' : 'int',
'*iops-size' : 'int' } }
##
# @ThrottleGroupProperties:
#
# Properties for throttle-group objects.
#
# @limits: limits to apply for this throttle group
#
# Features:
#
# @unstable: All members starting with x- are aliases for the same key
# without x- in the @limits object. This is not a stable
# interface and may be removed or changed incompatibly in the
# future. Use @limits for a supported stable interface.
#
# Since: 2.11
##
{ 'struct': 'ThrottleGroupProperties',
'data': { '*limits': 'ThrottleLimits',
'*x-iops-total': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-iops-total-max': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-iops-total-max-length': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-iops-read': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-iops-read-max': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-iops-read-max-length': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-iops-write': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-iops-write-max': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-iops-write-max-length': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-bps-total': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-bps-total-max': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-bps-total-max-length': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-bps-read': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-bps-read-max': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-bps-read-max-length': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-bps-write': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-bps-write-max': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-bps-write-max-length': { 'type': 'int',
'features': [ 'unstable' ] },
'*x-iops-size': { 'type': 'int',
'features': [ 'unstable' ] } } }
##
# @block-stream:
#
# Copy data from a backing file into a block device.
#
# The block streaming operation is performed in the background until
# the entire backing file has been copied. This command returns
# immediately once streaming has started. The status of ongoing block
# streaming operations can be checked with query-block-jobs. The
# operation can be stopped before it has completed using the
# block-job-cancel command.
#
# The node that receives the data is called the top image, can be
# located in any part of the chain (but always above the base image;
# see below) and can be specified using its device or node name.
# Earlier qemu versions only allowed 'device' to name the top level
# node; presence of the 'base-node' parameter during introspection can
# be used as a witness of the enhanced semantics of 'device'.
#
# If a base file is specified then sectors are not copied from that
# base file and its backing chain. This can be used to stream a
# subset of the backing file chain instead of flattening the entire
# image. When streaming completes the image file will have the base
# file as its backing file, unless that node was changed while the job
# was running. In that case, base's parent's backing (or filtered,
# whichever exists) child (i.e., base at the beginning of the job)
# will be the new backing file.
#
# On successful completion the image file is updated to drop the
# backing file and the BLOCK_JOB_COMPLETED event is emitted.
#
# In case @device is a filter node, block-stream modifies the first
# non-filter overlay node below it to point to the new backing node
# instead of modifying @device itself.
#
# @job-id: identifier for the newly-created block job. If omitted,
# the device name will be used. (Since 2.7)
#
# @device: the device or node name of the top image
#
# @base: the common backing file name. It cannot be set if @base-node
# or @bottom is also set.
#
# @base-node: the node name of the backing file. It cannot be set if
# @base or @bottom is also set. (Since 2.8)
#
# @bottom: the last node in the chain that should be streamed into
# top. It cannot be set if @base or @base-node is also set. It
# cannot be filter node. (Since 6.0)
#
# @backing-file: The backing file string to write into the top image.
# This filename is not validated.
#
# If a pathname string is such that it cannot be resolved by QEMU,
# that means that subsequent QMP or HMP commands must use
# node-names for the image in question, as filename lookup methods
# will fail.
#
# If not specified, QEMU will automatically determine the backing
# file string to use, or error out if there is no obvious choice.
# Care should be taken when specifying the string, to specify a
# valid filename or protocol. (Since 2.1)
#
# @speed: the maximum speed, in bytes per second
#
# @on-error: the action to take on an error (default report). 'stop'
# and 'enospc' can only be used if the block device supports
# io-status (see BlockInfo). (Since 1.3)
#
# @filter-node-name: the node name that should be assigned to the
# filter driver that the stream job inserts into the graph above
# @device. If this option is not given, a node name is
# autogenerated. (Since: 6.0)
#
# @auto-finalize: When false, this job will wait in a PENDING state
# after it has finished its work, waiting for @block-job-finalize
# before making any block graph changes. When true, this job will
# automatically perform its abort or commit actions. Defaults to
# true. (Since 3.1)
#
# @auto-dismiss: When false, this job will wait in a CONCLUDED state
# after it has completely ceased all work, and awaits
# @block-job-dismiss. When true, this job will automatically
# disappear from the query list without user intervention.
# Defaults to true. (Since 3.1)
#
# Returns:
# - Nothing on success.
# - If @device does not exist, DeviceNotFound.
#
# Since: 1.1
#
# Example:
#
# -> { "execute": "block-stream",
# "arguments": { "device": "virtio0",
# "base": "/tmp/master.qcow2" } }
# <- { "return": {} }
##
{ 'command': 'block-stream',
'data': { '*job-id': 'str', 'device': 'str', '*base': 'str',
'*base-node': 'str', '*backing-file': 'str', '*bottom': 'str',
'*speed': 'int', '*on-error': 'BlockdevOnError',
'*filter-node-name': 'str',
'*auto-finalize': 'bool', '*auto-dismiss': 'bool' },
'allow-preconfig': true }
##
# @block-job-set-speed:
#
# Set maximum speed for a background block operation.
#
# This command can only be issued when there is an active block job.
#
# Throttling can be disabled by setting the speed to 0.
#
# @device: The job identifier. This used to be a device name (hence
# the name of the parameter), but since QEMU 2.7 it can have other
# values.
#
# @speed: the maximum speed, in bytes per second, or 0 for unlimited.
# Defaults to 0.
#
# Returns:
# - Nothing on success
# - If no background operation is active on this device,
# DeviceNotActive
#
# Since: 1.1
##
{ 'command': 'block-job-set-speed',
'data': { 'device': 'str', 'speed': 'int' },
'allow-preconfig': true }
##
# @block-job-cancel:
#
# Stop an active background block operation.
#
# This command returns immediately after marking the active background
# block operation for cancellation. It is an error to call this
# command if no operation is in progress.
#
# The operation will cancel as soon as possible and then emit the
# BLOCK_JOB_CANCELLED event. Before that happens the job is still
# visible when enumerated using query-block-jobs.
#
# Note that if you issue 'block-job-cancel' after 'drive-mirror' has
# indicated (via the event BLOCK_JOB_READY) that the source and
# destination are synchronized, then the event triggered by this
# command changes to BLOCK_JOB_COMPLETED, to indicate that the
# mirroring has ended and the destination now has a point-in-time copy
# tied to the time of the cancellation.
#
# For streaming, the image file retains its backing file unless the
# streaming operation happens to complete just as it is being
# cancelled. A new streaming operation can be started at a later time
# to finish copying all data from the backing file.
#
# @device: The job identifier. This used to be a device name (hence
# the name of the parameter), but since QEMU 2.7 it can have other
# values.
#
# @force: If true, and the job has already emitted the event
# BLOCK_JOB_READY, abandon the job immediately (even if it is
# paused) instead of waiting for the destination to complete its
# final synchronization (since 1.3)
#
# Returns:
# - Nothing on success
# - If no background operation is active on this device,
# DeviceNotActive
#
# Since: 1.1
##
{ 'command': 'block-job-cancel', 'data': { 'device': 'str', '*force': 'bool' },
'allow-preconfig': true }
##
# @block-job-pause:
#
# Pause an active background block operation.
#
# This command returns immediately after marking the active background
# block operation for pausing. It is an error to call this command if
# no operation is in progress or if the job is already paused.
#
# The operation will pause as soon as possible. No event is emitted
# when the operation is actually paused. Cancelling a paused job
# automatically resumes it.
#
# @device: The job identifier. This used to be a device name (hence
# the name of the parameter), but since QEMU 2.7 it can have other
# values.
#
# Returns:
# - Nothing on success
# - If no background operation is active on this device,
# DeviceNotActive
#
# Since: 1.3
##
{ 'command': 'block-job-pause', 'data': { 'device': 'str' },
'allow-preconfig': true }
##
# @block-job-resume:
#
# Resume an active background block operation.
#
# This command returns immediately after resuming a paused background
# block operation. It is an error to call this command if no
# operation is in progress or if the job is not paused.
#
# This command also clears the error status of the job.
#
# @device: The job identifier. This used to be a device name (hence
# the name of the parameter), but since QEMU 2.7 it can have other
# values.
#
# Returns:
# - Nothing on success
# - If no background operation is active on this device,
# DeviceNotActive
#
# Since: 1.3
##
{ 'command': 'block-job-resume', 'data': { 'device': 'str' },
'allow-preconfig': true }
##
# @block-job-complete:
#
# Manually trigger completion of an active background block operation.
# This is supported for drive mirroring, where it also switches the
# device to write to the target path only. The ability to complete is
# signaled with a BLOCK_JOB_READY event.
#
# This command completes an active background block operation
# synchronously. The ordering of this command's return with the
# BLOCK_JOB_COMPLETED event is not defined. Note that if an I/O error
# occurs during the processing of this command: 1) the command itself
# will fail; 2) the error will be processed according to the
# rerror/werror arguments that were specified when starting the
# operation.
#
# A cancelled or paused job cannot be completed.
#
# @device: The job identifier. This used to be a device name (hence
# the name of the parameter), but since QEMU 2.7 it can have other
# values.
#
# Returns:
# - Nothing on success
# - If no background operation is active on this device,
# DeviceNotActive
#
# Since: 1.3
##
{ 'command': 'block-job-complete', 'data': { 'device': 'str' },
'allow-preconfig': true }
##
# @block-job-dismiss:
#
# For jobs that have already concluded, remove them from the
# block-job-query list. This command only needs to be run for jobs
# which were started with QEMU 2.12+ job lifetime management
# semantics.
#
# This command will refuse to operate on any job that has not yet
# reached its terminal state, JOB_STATUS_CONCLUDED. For jobs that make
# use of the BLOCK_JOB_READY event, block-job-cancel or
# block-job-complete will still need to be used as appropriate.
#
# @id: The job identifier.
#
# Returns: Nothing on success
#
# Since: 2.12
##
{ 'command': 'block-job-dismiss', 'data': { 'id': 'str' },
'allow-preconfig': true }
##
# @block-job-finalize:
#
# Once a job that has manual=true reaches the pending state, it can be
# instructed to finalize any graph changes and do any necessary
# cleanup via this command. For jobs in a transaction, instructing
# one job to finalize will force ALL jobs in the transaction to
# finalize, so it is only necessary to instruct a single member job to
# finalize.
#
# @id: The job identifier.
#
# Returns: Nothing on success
#
# Since: 2.12
##
{ 'command': 'block-job-finalize', 'data': { 'id': 'str' },
'allow-preconfig': true }
##
# @BlockJobChangeOptionsMirror:
#
# @copy-mode: Switch to this copy mode. Currently, only the switch
# from 'background' to 'write-blocking' is implemented.
#
# Since: 8.2
##
{ 'struct': 'BlockJobChangeOptionsMirror',
'data': { 'copy-mode' : 'MirrorCopyMode' } }
##
# @BlockJobChangeOptions:
#
# Block job options that can be changed after job creation.
#
# @id: The job identifier
#
# @type: The job type
#
# Since 8.2
##
{ 'union': 'BlockJobChangeOptions',
'base': { 'id': 'str', 'type': 'JobType' },
'discriminator': 'type',
'data': { 'mirror': 'BlockJobChangeOptionsMirror' } }
##
# @block-job-change:
#
# Change the block job's options.
#
# Since: 8.2
##
{ 'command': 'block-job-change',
'data': 'BlockJobChangeOptions', 'boxed': true }
##
# @BlockdevDiscardOptions:
#
# Determines how to handle discard requests.
#
# @ignore: Ignore the request
#
# @unmap: Forward as an unmap request
#
# Since: 2.9
##
{ 'enum': 'BlockdevDiscardOptions',
'data': [ 'ignore', 'unmap' ] }
##
# @BlockdevDetectZeroesOptions:
#
# Describes the operation mode for the automatic conversion of plain
# zero writes by the OS to driver specific optimized zero write
# commands.
#
# @off: Disabled (default)
#
# @on: Enabled
#
# @unmap: Enabled and even try to unmap blocks if possible. This
# requires also that @BlockdevDiscardOptions is set to unmap for
# this device.
#
# Since: 2.1
##
{ 'enum': 'BlockdevDetectZeroesOptions',
'data': [ 'off', 'on', 'unmap' ] }
##
# @BlockdevAioOptions:
#
# Selects the AIO backend to handle I/O requests
#
# @threads: Use qemu's thread pool
#
# @native: Use native AIO backend (only Linux and Windows)
#
# @io_uring: Use linux io_uring (since 5.0)
#
# Since: 2.9
##
{ 'enum': 'BlockdevAioOptions',
'data': [ 'threads', 'native',
{ 'name': 'io_uring', 'if': 'CONFIG_LINUX_IO_URING' } ] }
##
# @BlockdevCacheOptions:
#
# Includes cache-related options for block devices
#
# @direct: enables use of O_DIRECT (bypass the host page cache;
# default: false)
#
# @no-flush: ignore any flush requests for the device (default: false)
#
# Since: 2.9
##
{ 'struct': 'BlockdevCacheOptions',
'data': { '*direct': 'bool',
'*no-flush': 'bool' } }
##
# @BlockdevDriver:
#
# Drivers that are supported in block device operations.
#
# @throttle: Since 2.11
#
# @nvme: Since 2.12
#
# @copy-on-read: Since 3.0
#
# @blklogwrites: Since 3.0
#
# @blkreplay: Since 4.2
#
# @compress: Since 5.0
#
# @copy-before-write: Since 6.2
#
# @snapshot-access: Since 7.0
#
# Since: 2.9
##
{ 'enum': 'BlockdevDriver',
'data': [ 'blkdebug', 'blklogwrites', 'blkreplay', 'blkverify', 'bochs',
'cloop', 'compress', 'copy-before-write', 'copy-on-read', 'dmg',
'file', 'snapshot-access', 'ftp', 'ftps', 'gluster',
{'name': 'host_cdrom', 'if': 'HAVE_HOST_BLOCK_DEVICE' },
{'name': 'host_device', 'if': 'HAVE_HOST_BLOCK_DEVICE' },
'http', 'https',
{ 'name': 'io_uring', 'if': 'CONFIG_BLKIO' },
'iscsi',
'luks', 'nbd', 'nfs', 'null-aio', 'null-co', 'nvme',
{ 'name': 'nvme-io_uring', 'if': 'CONFIG_BLKIO' },
'parallels', 'preallocate', 'qcow', 'qcow2', 'qed', 'quorum',
'raw', 'rbd',
{ 'name': 'replication', 'if': 'CONFIG_REPLICATION' },
'ssh', 'throttle', 'vdi', 'vhdx',
{ 'name': 'virtio-blk-vfio-pci', 'if': 'CONFIG_BLKIO' },
{ 'name': 'virtio-blk-vhost-user', 'if': 'CONFIG_BLKIO' },
{ 'name': 'virtio-blk-vhost-vdpa', 'if': 'CONFIG_BLKIO' },
'vmdk', 'vpc', 'vvfat' ] }
##
# @BlockdevOptionsFile:
#
# Driver specific block device options for the file backend.
#
# @filename: path to the image file
#
# @pr-manager: the id for the object that will handle persistent
# reservations for this device (default: none, forward the
# commands via SG_IO; since 2.11)
#
# @aio: AIO backend (default: threads) (since: 2.8)
#
# @aio-max-batch: maximum number of requests to batch together into a
# single submission in the AIO backend. The smallest value
# between this and the aio-max-batch value of the IOThread object
# is chosen. 0 means that the AIO backend will handle it
# automatically. (default: 0, since 6.2)
#
# @locking: whether to enable file locking. If set to 'auto', only
# enable when Open File Descriptor (OFD) locking API is available
# (default: auto, since 2.10)
#
# @drop-cache: invalidate page cache during live migration. This
# prevents stale data on the migration destination with
# cache.direct=off. Currently only supported on Linux hosts.
# (default: on, since: 4.0)
#
# @x-check-cache-dropped: whether to check that page cache was dropped
# on live migration. May cause noticeable delays if the image
# file is large, do not use in production. (default: off)
# (since: 3.0)
#
# Features:
#
# @dynamic-auto-read-only: If present, enabled auto-read-only means
# that the driver will open the image read-only at first,
# dynamically reopen the image file read-write when the first
# writer is attached to the node and reopen read-only when the
# last writer is detached. This allows giving QEMU write
# permissions only on demand when an operation actually needs
# write access.
#
# @unstable: Member x-check-cache-dropped is meant for debugging.
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsFile',
'data': { 'filename': 'str',
'*pr-manager': 'str',
'*locking': 'OnOffAuto',
'*aio': 'BlockdevAioOptions',
'*aio-max-batch': 'int',
'*drop-cache': {'type': 'bool',
'if': 'CONFIG_LINUX'},
'*x-check-cache-dropped': { 'type': 'bool',
'features': [ 'unstable' ] } },
'features': [ { 'name': 'dynamic-auto-read-only',
'if': 'CONFIG_POSIX' } ] }
##
# @BlockdevOptionsNull:
#
# Driver specific block device options for the null backend.
#
# @size: size of the device in bytes.
#
# @latency-ns: emulated latency (in nanoseconds) in processing
# requests. Default to zero which completes requests immediately.
# (Since 2.4)
#
# @read-zeroes: if true, reads from the device produce zeroes; if
# false, the buffer is left unchanged.
# (default: false; since: 4.1)
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsNull',
'data': { '*size': 'int', '*latency-ns': 'uint64', '*read-zeroes': 'bool' } }
##
# @BlockdevOptionsNVMe:
#
# Driver specific block device options for the NVMe backend.
#
# @device: PCI controller address of the NVMe device in format
# hhhh:bb:ss.f (host:bus:slot.function)
#
# @namespace: namespace number of the device, starting from 1.
#
# Note that the PCI @device must have been unbound from any host
# kernel driver before instructing QEMU to add the blockdev.
#
# Since: 2.12
##
{ 'struct': 'BlockdevOptionsNVMe',
'data': { 'device': 'str', 'namespace': 'int' } }
##
# @BlockdevOptionsVVFAT:
#
# Driver specific block device options for the vvfat protocol.
#
# @dir: directory to be exported as FAT image
#
# @fat-type: FAT type: 12, 16 or 32
#
# @floppy: whether to export a floppy image (true) or partitioned hard
# disk (false; default)
#
# @label: set the volume label, limited to 11 bytes. FAT16 and FAT32
# traditionally have some restrictions on labels, which are
# ignored by most operating systems. Defaults to "QEMU VVFAT".
# (since 2.4)
#
# @rw: whether to allow write operations (default: false)
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsVVFAT',
'data': { 'dir': 'str', '*fat-type': 'int', '*floppy': 'bool',
'*label': 'str', '*rw': 'bool' } }
##
# @BlockdevOptionsGenericFormat:
#
# Driver specific block device options for image format that have no
# option besides their data source.
#
# @file: reference to or definition of the data source block device
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsGenericFormat',
'data': { 'file': 'BlockdevRef' } }
##
# @BlockdevOptionsLUKS:
#
# Driver specific block device options for LUKS.
#
# @key-secret: the ID of a QCryptoSecret object providing the
# decryption key (since 2.6). Mandatory except when doing a
# metadata-only probe of the image.
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsLUKS',
'base': 'BlockdevOptionsGenericFormat',
'data': { '*key-secret': 'str' } }
##
# @BlockdevOptionsGenericCOWFormat:
#
# Driver specific block device options for image format that have no
# option besides their data source and an optional backing file.
#
# @backing: reference to or definition of the backing file block
# device, null disables the backing file entirely. Defaults to
# the backing file stored the image file.
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsGenericCOWFormat',
'base': 'BlockdevOptionsGenericFormat',
'data': { '*backing': 'BlockdevRefOrNull' } }
##
# @Qcow2OverlapCheckMode:
#
# General overlap check modes.
#
# @none: Do not perform any checks
#
# @constant: Perform only checks which can be done in constant time
# and without reading anything from disk
#
# @cached: Perform only checks which can be done without reading
# anything from disk
#
# @all: Perform all available overlap checks
#
# Since: 2.9
##
{ 'enum': 'Qcow2OverlapCheckMode',
'data': [ 'none', 'constant', 'cached', 'all' ] }
##
# @Qcow2OverlapCheckFlags:
#
# Structure of flags for each metadata structure. Setting a field to
# 'true' makes qemu guard that structure against unintended
# overwriting. The default value is chosen according to the template
# given.
#
# @template: Specifies a template mode which can be adjusted using the
# other flags, defaults to 'cached'
#
# @bitmap-directory: since 3.0
#
# Since: 2.9
##
{ 'struct': 'Qcow2OverlapCheckFlags',
'data': { '*template': 'Qcow2OverlapCheckMode',
'*main-header': 'bool',
'*active-l1': 'bool',
'*active-l2': 'bool',
'*refcount-table': 'bool',
'*refcount-block': 'bool',
'*snapshot-table': 'bool',
'*inactive-l1': 'bool',
'*inactive-l2': 'bool',
'*bitmap-directory': 'bool' } }
##
# @Qcow2OverlapChecks:
#
# Specifies which metadata structures should be guarded against
# unintended overwriting.
#
# @flags: set of flags for separate specification of each metadata
# structure type
#
# @mode: named mode which chooses a specific set of flags
#
# Since: 2.9
##
{ 'alternate': 'Qcow2OverlapChecks',
'data': { 'flags': 'Qcow2OverlapCheckFlags',
'mode': 'Qcow2OverlapCheckMode' } }
##
# @BlockdevQcowEncryptionFormat:
#
# @aes: AES-CBC with plain64 initialization vectors
#
# Since: 2.10
##
{ 'enum': 'BlockdevQcowEncryptionFormat',
'data': [ 'aes' ] }
##
# @BlockdevQcowEncryption:
#
# Since: 2.10
##
{ 'union': 'BlockdevQcowEncryption',
'base': { 'format': 'BlockdevQcowEncryptionFormat' },
'discriminator': 'format',
'data': { 'aes': 'QCryptoBlockOptionsQCow' } }
##
# @BlockdevOptionsQcow:
#
# Driver specific block device options for qcow.
#
# @encrypt: Image decryption options. Mandatory for encrypted images,
# except when doing a metadata-only probe of the image.
#
# Since: 2.10
##
{ 'struct': 'BlockdevOptionsQcow',
'base': 'BlockdevOptionsGenericCOWFormat',
'data': { '*encrypt': 'BlockdevQcowEncryption' } }
##
# @BlockdevQcow2EncryptionFormat:
#
# @aes: AES-CBC with plain64 initialization vectors
#
# Since: 2.10
##
{ 'enum': 'BlockdevQcow2EncryptionFormat',
'data': [ 'aes', 'luks' ] }
##
# @BlockdevQcow2Encryption:
#
# Since: 2.10
##
{ 'union': 'BlockdevQcow2Encryption',
'base': { 'format': 'BlockdevQcow2EncryptionFormat' },
'discriminator': 'format',
'data': { 'aes': 'QCryptoBlockOptionsQCow',
'luks': 'QCryptoBlockOptionsLUKS'} }
##
# @BlockdevOptionsPreallocate:
#
# Filter driver intended to be inserted between format and protocol
# node and do preallocation in protocol node on write.
#
# @prealloc-align: on preallocation, align file length to this number,
# default 1048576 (1M)
#
# @prealloc-size: how much to preallocate, default 134217728 (128M)
#
# Since: 6.0
##
{ 'struct': 'BlockdevOptionsPreallocate',
'base': 'BlockdevOptionsGenericFormat',
'data': { '*prealloc-align': 'int', '*prealloc-size': 'int' } }
##
# @BlockdevOptionsQcow2:
#
# Driver specific block device options for qcow2.
#
# @lazy-refcounts: whether to enable the lazy refcounts feature
# (default is taken from the image file)
#
# @pass-discard-request: whether discard requests to the qcow2 device
# should be forwarded to the data source
#
# @pass-discard-snapshot: whether discard requests for the data source
# should be issued when a snapshot operation (e.g. deleting a
# snapshot) frees clusters in the qcow2 file
#
# @pass-discard-other: whether discard requests for the data source
# should be issued on other occasions where a cluster gets freed
#
# @discard-no-unref: when enabled, data clusters will remain
# preallocated when they are no longer used, e.g. because they are
# discarded or converted to zero clusters. As usual, whether the
# old data is discarded or kept on the protocol level (i.e. in the
# image file) depends on the setting of the pass-discard-request
# option. Keeping the clusters preallocated prevents qcow2
# fragmentation that would otherwise be caused by freeing and
# re-allocating them later. Besides potential performance
# degradation, such fragmentation can lead to increased allocation
# of clusters past the end of the image file, resulting in image
# files whose file length can grow much larger than their guest disk
# size would suggest. If image file length is of concern (e.g. when
# storing qcow2 images directly on block devices), you should
# consider enabling this option. (since 8.1)
#
# @overlap-check: which overlap checks to perform for writes to the
# image, defaults to 'cached' (since 2.2)
#
# @cache-size: the maximum total size of the L2 table and refcount
# block caches in bytes (since 2.2)
#
# @l2-cache-size: the maximum size of the L2 table cache in bytes
# (since 2.2)
#
# @l2-cache-entry-size: the size of each entry in the L2 cache in
# bytes. It must be a power of two between 512 and the cluster
# size. The default value is the cluster size (since 2.12)
#
# @refcount-cache-size: the maximum size of the refcount block cache
# in bytes (since 2.2)
#
# @cache-clean-interval: clean unused entries in the L2 and refcount
# caches. The interval is in seconds. The default value is 600
# on supporting platforms, and 0 on other platforms. 0 disables
# this feature. (since 2.5)
#
# @encrypt: Image decryption options. Mandatory for encrypted images,
# except when doing a metadata-only probe of the image. (since
# 2.10)
#
# @data-file: reference to or definition of the external data file.
# This may only be specified for images that require an external
# data file. If it is not specified for such an image, the data
# file name is loaded from the image file. (since 4.0)
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsQcow2',
'base': 'BlockdevOptionsGenericCOWFormat',
'data': { '*lazy-refcounts': 'bool',
'*pass-discard-request': 'bool',
'*pass-discard-snapshot': 'bool',
'*pass-discard-other': 'bool',
'*discard-no-unref': 'bool',
'*overlap-check': 'Qcow2OverlapChecks',
'*cache-size': 'int',
'*l2-cache-size': 'int',
'*l2-cache-entry-size': 'int',
'*refcount-cache-size': 'int',
'*cache-clean-interval': 'int',
'*encrypt': 'BlockdevQcow2Encryption',
'*data-file': 'BlockdevRef' } }
##
# @SshHostKeyCheckMode:
#
# @none: Don't check the host key at all
#
# @hash: Compare the host key with a given hash
#
# @known_hosts: Check the host key against the known_hosts file
#
# Since: 2.12
##
{ 'enum': 'SshHostKeyCheckMode',
'data': [ 'none', 'hash', 'known_hosts' ] }
##
# @SshHostKeyCheckHashType:
#
# @md5: The given hash is an md5 hash
#
# @sha1: The given hash is an sha1 hash
#
# @sha256: The given hash is an sha256 hash
#
# Since: 2.12
##
{ 'enum': 'SshHostKeyCheckHashType',
'data': [ 'md5', 'sha1', 'sha256' ] }
##
# @SshHostKeyHash:
#
# @type: The hash algorithm used for the hash
#
# @hash: The expected hash value
#
# Since: 2.12
##
{ 'struct': 'SshHostKeyHash',
'data': { 'type': 'SshHostKeyCheckHashType',
'hash': 'str' }}
##
# @SshHostKeyCheck:
#
# Since: 2.12
##
{ 'union': 'SshHostKeyCheck',
'base': { 'mode': 'SshHostKeyCheckMode' },
'discriminator': 'mode',
'data': { 'hash': 'SshHostKeyHash' } }
##
# @BlockdevOptionsSsh:
#
# @server: host address
#
# @path: path to the image on the host
#
# @user: user as which to connect, defaults to current local user name
#
# @host-key-check: Defines how and what to check the host key against
# (default: known_hosts)
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsSsh',
'data': { 'server': 'InetSocketAddress',
'path': 'str',
'*user': 'str',
'*host-key-check': 'SshHostKeyCheck' } }
##
# @BlkdebugEvent:
#
# Trigger events supported by blkdebug.
#
# @l1_shrink_write_table: write zeros to the l1 table to shrink image.
# (since 2.11)
#
# @l1_shrink_free_l2_clusters: discard the l2 tables. (since 2.11)
#
# @cor_write: a write due to copy-on-read (since 2.11)
#
# @cluster_alloc_space: an allocation of file space for a cluster
# (since 4.1)
#
# @none: triggers once at creation of the blkdebug node (since 4.1)
#
# Since: 2.9
##
{ 'enum': 'BlkdebugEvent', 'prefix': 'BLKDBG',
'data': [ 'l1_update', 'l1_grow_alloc_table', 'l1_grow_write_table',
'l1_grow_activate_table', 'l2_load', 'l2_update',
'l2_update_compressed', 'l2_alloc_cow_read', 'l2_alloc_write',
'read_aio', 'read_backing_aio', 'read_compressed', 'write_aio',
'write_compressed', 'vmstate_load', 'vmstate_save', 'cow_read',
'cow_write', 'reftable_load', 'reftable_grow', 'reftable_update',
'refblock_load', 'refblock_update', 'refblock_update_part',
'refblock_alloc', 'refblock_alloc_hookup', 'refblock_alloc_write',
'refblock_alloc_write_blocks', 'refblock_alloc_write_table',
'refblock_alloc_switch_table', 'cluster_alloc',
'cluster_alloc_bytes', 'cluster_free', 'flush_to_os',
'flush_to_disk', 'pwritev_rmw_head', 'pwritev_rmw_after_head',
'pwritev_rmw_tail', 'pwritev_rmw_after_tail', 'pwritev',
'pwritev_zero', 'pwritev_done', 'empty_image_prepare',
'l1_shrink_write_table', 'l1_shrink_free_l2_clusters',
'cor_write', 'cluster_alloc_space', 'none'] }
##
# @BlkdebugIOType:
#
# Kinds of I/O that blkdebug can inject errors in.
#
# @read: .bdrv_co_preadv()
#
# @write: .bdrv_co_pwritev()
#
# @write-zeroes: .bdrv_co_pwrite_zeroes()
#
# @discard: .bdrv_co_pdiscard()
#
# @flush: .bdrv_co_flush_to_disk()
#
# @block-status: .bdrv_co_block_status()
#
# Since: 4.1
##
{ 'enum': 'BlkdebugIOType', 'prefix': 'BLKDEBUG_IO_TYPE',
'data': [ 'read', 'write', 'write-zeroes', 'discard', 'flush',
'block-status' ] }
##
# @BlkdebugInjectErrorOptions:
#
# Describes a single error injection for blkdebug.
#
# @event: trigger event
#
# @state: the state identifier blkdebug needs to be in to actually
# trigger the event; defaults to "any"
#
# @iotype: the type of I/O operations on which this error should be
# injected; defaults to "all read, write, write-zeroes, discard,
# and flush operations" (since: 4.1)
#
# @errno: error identifier (errno) to be returned; defaults to EIO
#
# @sector: specifies the sector index which has to be affected in
# order to actually trigger the event; defaults to "any sector"
#
# @once: disables further events after this one has been triggered;
# defaults to false
#
# @immediately: fail immediately; defaults to false
#
# Since: 2.9
##
{ 'struct': 'BlkdebugInjectErrorOptions',
'data': { 'event': 'BlkdebugEvent',
'*state': 'int',
'*iotype': 'BlkdebugIOType',
'*errno': 'int',
'*sector': 'int',
'*once': 'bool',
'*immediately': 'bool' } }
##
# @BlkdebugSetStateOptions:
#
# Describes a single state-change event for blkdebug.
#
# @event: trigger event
#
# @state: the current state identifier blkdebug needs to be in;
# defaults to "any"
#
# @new_state: the state identifier blkdebug is supposed to assume if
# this event is triggered
#
# Since: 2.9
##
{ 'struct': 'BlkdebugSetStateOptions',
'data': { 'event': 'BlkdebugEvent',
'*state': 'int',
'new_state': 'int' } }
##
# @BlockdevOptionsBlkdebug:
#
# Driver specific block device options for blkdebug.
#
# @image: underlying raw block device (or image file)
#
# @config: filename of the configuration file
#
# @align: required alignment for requests in bytes, must be positive
# power of 2, or 0 for default
#
# @max-transfer: maximum size for I/O transfers in bytes, must be
# positive multiple of @align and of the underlying file's request
# alignment (but need not be a power of 2), or 0 for default
# (since 2.10)
#
# @opt-write-zero: preferred alignment for write zero requests in
# bytes, must be positive multiple of @align and of the underlying
# file's request alignment (but need not be a power of 2), or 0
# for default (since 2.10)
#
# @max-write-zero: maximum size for write zero requests in bytes, must
# be positive multiple of @align, of @opt-write-zero, and of the
# underlying file's request alignment (but need not be a power of
# 2), or 0 for default (since 2.10)
#
# @opt-discard: preferred alignment for discard requests in bytes,
# must be positive multiple of @align and of the underlying file's
# request alignment (but need not be a power of 2), or 0 for
# default (since 2.10)
#
# @max-discard: maximum size for discard requests in bytes, must be
# positive multiple of @align, of @opt-discard, and of the
# underlying file's request alignment (but need not be a power of
# 2), or 0 for default (since 2.10)
#
# @inject-error: array of error injection descriptions
#
# @set-state: array of state-change descriptions
#
# @take-child-perms: Permissions to take on @image in addition to what
# is necessary anyway (which depends on how the blkdebug node is
# used). Defaults to none. (since 5.0)
#
# @unshare-child-perms: Permissions not to share on @image in addition
# to what cannot be shared anyway (which depends on how the
# blkdebug node is used). Defaults to none. (since 5.0)
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsBlkdebug',
'data': { 'image': 'BlockdevRef',
'*config': 'str',
'*align': 'int', '*max-transfer': 'int32',
'*opt-write-zero': 'int32', '*max-write-zero': 'int32',
'*opt-discard': 'int32', '*max-discard': 'int32',
'*inject-error': ['BlkdebugInjectErrorOptions'],
'*set-state': ['BlkdebugSetStateOptions'],
'*take-child-perms': ['BlockPermission'],
'*unshare-child-perms': ['BlockPermission'] } }
##
# @BlockdevOptionsBlklogwrites:
#
# Driver specific block device options for blklogwrites.
#
# @file: block device
#
# @log: block device used to log writes to @file
#
# @log-sector-size: sector size used in logging writes to @file,
# determines granularity of offsets and sizes of writes
# (default: 512)
#
# @log-append: append to an existing log (default: false)
#
# @log-super-update-interval: interval of write requests after which
# the log super block is updated to disk (default: 4096)
#
# Since: 3.0
##
{ 'struct': 'BlockdevOptionsBlklogwrites',
'data': { 'file': 'BlockdevRef',
'log': 'BlockdevRef',
'*log-sector-size': 'uint32',
'*log-append': 'bool',
'*log-super-update-interval': 'uint64' } }
##
# @BlockdevOptionsBlkverify:
#
# Driver specific block device options for blkverify.
#
# @test: block device to be tested
#
# @raw: raw image used for verification
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsBlkverify',
'data': { 'test': 'BlockdevRef',
'raw': 'BlockdevRef' } }
##
# @BlockdevOptionsBlkreplay:
#
# Driver specific block device options for blkreplay.
#
# @image: disk image which should be controlled with blkreplay
#
# Since: 4.2
##
{ 'struct': 'BlockdevOptionsBlkreplay',
'data': { 'image': 'BlockdevRef' } }
##
# @QuorumReadPattern:
#
# An enumeration of quorum read patterns.
#
# @quorum: read all the children and do a quorum vote on reads
#
# @fifo: read only from the first child that has not failed
#
# Since: 2.9
##
{ 'enum': 'QuorumReadPattern', 'data': [ 'quorum', 'fifo' ] }
##
# @BlockdevOptionsQuorum:
#
# Driver specific block device options for Quorum
#
# @blkverify: true if the driver must print content mismatch set to
# false by default
#
# @children: the children block devices to use
#
# @vote-threshold: the vote limit under which a read will fail
#
# @rewrite-corrupted: rewrite corrupted data when quorum is reached
# (Since 2.1)
#
# @read-pattern: choose read pattern and set to quorum by default
# (Since 2.2)
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsQuorum',
'data': { '*blkverify': 'bool',
'children': [ 'BlockdevRef' ],
'vote-threshold': 'int',
'*rewrite-corrupted': 'bool',
'*read-pattern': 'QuorumReadPattern' } }
##
# @BlockdevOptionsGluster:
#
# Driver specific block device options for Gluster
#
# @volume: name of gluster volume where VM image resides
#
# @path: absolute path to image file in gluster volume
#
# @server: gluster servers description
#
# @debug: libgfapi log level (default '4' which is Error) (Since 2.8)
#
# @logfile: libgfapi log file (default /dev/stderr) (Since 2.8)
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsGluster',
'data': { 'volume': 'str',
'path': 'str',
'server': ['SocketAddress'],
'*debug': 'int',
'*logfile': 'str' } }
##
# @BlockdevOptionsIoUring:
#
# Driver specific block device options for the io_uring backend.
#
# @filename: path to the image file
#
# Since: 7.2
##
{ 'struct': 'BlockdevOptionsIoUring',
'data': { 'filename': 'str' },
'if': 'CONFIG_BLKIO' }
##
# @BlockdevOptionsNvmeIoUring:
#
# Driver specific block device options for the nvme-io_uring backend.
#
# @path: path to the NVMe namespace's character device (e.g.
# /dev/ng0n1).
#
# Since: 7.2
##
{ 'struct': 'BlockdevOptionsNvmeIoUring',
'data': { 'path': 'str' },
'if': 'CONFIG_BLKIO' }
##
# @BlockdevOptionsVirtioBlkVfioPci:
#
# Driver specific block device options for the virtio-blk-vfio-pci
# backend.
#
# @path: path to the PCI device's sysfs directory (e.g.
# /sys/bus/pci/devices/0000:00:01.0).
#
# Since: 7.2
##
{ 'struct': 'BlockdevOptionsVirtioBlkVfioPci',
'data': { 'path': 'str' },
'if': 'CONFIG_BLKIO' }
##
# @BlockdevOptionsVirtioBlkVhostUser:
#
# Driver specific block device options for the virtio-blk-vhost-user
# backend.
#
# @path: path to the vhost-user UNIX domain socket.
#
# Since: 7.2
##
{ 'struct': 'BlockdevOptionsVirtioBlkVhostUser',
'data': { 'path': 'str' },
'if': 'CONFIG_BLKIO' }
##
# @BlockdevOptionsVirtioBlkVhostVdpa:
#
# Driver specific block device options for the virtio-blk-vhost-vdpa
# backend.
#
# @path: path to the vhost-vdpa character device.
#
# Features:
# @fdset: Member @path supports the special "/dev/fdset/N" path
# (since 8.1)
#
# Since: 7.2
##
{ 'struct': 'BlockdevOptionsVirtioBlkVhostVdpa',
'data': { 'path': 'str' },
'features': [ { 'name' :'fdset',
'if': 'CONFIG_BLKIO_VHOST_VDPA_FD' } ],
'if': 'CONFIG_BLKIO' }
##
# @IscsiTransport:
#
# An enumeration of libiscsi transport types
#
# Since: 2.9
##
{ 'enum': 'IscsiTransport',
'data': [ 'tcp', 'iser' ] }
##
# @IscsiHeaderDigest:
#
# An enumeration of header digests supported by libiscsi
#
# Since: 2.9
##
{ 'enum': 'IscsiHeaderDigest',
'prefix': 'QAPI_ISCSI_HEADER_DIGEST',
'data': [ 'crc32c', 'none', 'crc32c-none', 'none-crc32c' ] }
##
# @BlockdevOptionsIscsi:
#
# @transport: The iscsi transport type
#
# @portal: The address of the iscsi portal
#
# @target: The target iqn name
#
# @lun: LUN to connect to. Defaults to 0.
#
# @user: User name to log in with. If omitted, no CHAP authentication
# is performed.
#
# @password-secret: The ID of a QCryptoSecret object providing the
# password for the login. This option is required if @user is
# specified.
#
# @initiator-name: The iqn name we want to identify to the target as.
# If this option is not specified, an initiator name is generated
# automatically.
#
# @header-digest: The desired header digest. Defaults to none-crc32c.
#
# @timeout: Timeout in seconds after which a request will timeout. 0
# means no timeout and is the default.
#
# Driver specific block device options for iscsi
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsIscsi',
'data': { 'transport': 'IscsiTransport',
'portal': 'str',
'target': 'str',
'*lun': 'int',
'*user': 'str',
'*password-secret': 'str',
'*initiator-name': 'str',
'*header-digest': 'IscsiHeaderDigest',
'*timeout': 'int' } }
##
# @RbdAuthMode:
#
# Since: 3.0
##
{ 'enum': 'RbdAuthMode',
'data': [ 'cephx', 'none' ] }
##
# @RbdImageEncryptionFormat:
#
# @luks-any: Used for opening either luks or luks2 (Since 8.0)
#
# Since: 6.1
##
{ 'enum': 'RbdImageEncryptionFormat',
'data': [ 'luks', 'luks2', 'luks-any' ] }
##
# @RbdEncryptionOptionsLUKSBase:
#
# @key-secret: ID of a QCryptoSecret object providing a passphrase for
# unlocking the encryption
#
# Since: 6.1
##
{ 'struct': 'RbdEncryptionOptionsLUKSBase',
'data': { 'key-secret': 'str' } }
##
# @RbdEncryptionCreateOptionsLUKSBase:
#
# @cipher-alg: The encryption algorithm
#
# Since: 6.1
##
{ 'struct': 'RbdEncryptionCreateOptionsLUKSBase',
'base': 'RbdEncryptionOptionsLUKSBase',
'data': { '*cipher-alg': 'QCryptoCipherAlgorithm' } }
##
# @RbdEncryptionOptionsLUKS:
#
# Since: 6.1
##
{ 'struct': 'RbdEncryptionOptionsLUKS',
'base': 'RbdEncryptionOptionsLUKSBase',
'data': { } }
##
# @RbdEncryptionOptionsLUKS2:
#
# Since: 6.1
##
{ 'struct': 'RbdEncryptionOptionsLUKS2',
'base': 'RbdEncryptionOptionsLUKSBase',
'data': { } }
##
# @RbdEncryptionOptionsLUKSAny:
#
# Since: 8.0
##
{ 'struct': 'RbdEncryptionOptionsLUKSAny',
'base': 'RbdEncryptionOptionsLUKSBase',
'data': { } }
##
# @RbdEncryptionCreateOptionsLUKS:
#
# Since: 6.1
##
{ 'struct': 'RbdEncryptionCreateOptionsLUKS',
'base': 'RbdEncryptionCreateOptionsLUKSBase',
'data': { } }
##
# @RbdEncryptionCreateOptionsLUKS2:
#
# Since: 6.1
##
{ 'struct': 'RbdEncryptionCreateOptionsLUKS2',
'base': 'RbdEncryptionCreateOptionsLUKSBase',
'data': { } }
##
# @RbdEncryptionOptions:
#
# @format: Encryption format.
#
# @parent: Parent image encryption options (for cloned images). Can
# be left unspecified if this cloned image is encrypted using the
# same format and secret as its parent image (i.e. not explicitly
# formatted) or if its parent image is not encrypted. (Since 8.0)
#
# Since: 6.1
##
{ 'union': 'RbdEncryptionOptions',
'base': { 'format': 'RbdImageEncryptionFormat',
'*parent': 'RbdEncryptionOptions' },
'discriminator': 'format',
'data': { 'luks': 'RbdEncryptionOptionsLUKS',
'luks2': 'RbdEncryptionOptionsLUKS2',
'luks-any': 'RbdEncryptionOptionsLUKSAny'} }
##
# @RbdEncryptionCreateOptions:
#
# Since: 6.1
##
{ 'union': 'RbdEncryptionCreateOptions',
'base': { 'format': 'RbdImageEncryptionFormat' },
'discriminator': 'format',
'data': { 'luks': 'RbdEncryptionCreateOptionsLUKS',
'luks2': 'RbdEncryptionCreateOptionsLUKS2' } }
##
# @BlockdevOptionsRbd:
#
# @pool: Ceph pool name.
#
# @namespace: Rados namespace name in the Ceph pool. (Since 5.0)
#
# @image: Image name in the Ceph pool.
#
# @conf: path to Ceph configuration file. Values in the configuration
# file will be overridden by options specified via QAPI.
#
# @snapshot: Ceph snapshot name.
#
# @encrypt: Image encryption options. (Since 6.1)
#
# @user: Ceph id name.
#
# @auth-client-required: Acceptable authentication modes. This maps
# to Ceph configuration option "auth_client_required". (Since
# 3.0)
#
# @key-secret: ID of a QCryptoSecret object providing a key for cephx
# authentication. This maps to Ceph configuration option "key".
# (Since 3.0)
#
# @server: Monitor host address and port. This maps to the "mon_host"
# Ceph option.
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsRbd',
'data': { 'pool': 'str',
'*namespace': 'str',
'image': 'str',
'*conf': 'str',
'*snapshot': 'str',
'*encrypt': 'RbdEncryptionOptions',
'*user': 'str',
'*auth-client-required': ['RbdAuthMode'],
'*key-secret': 'str',
'*server': ['InetSocketAddressBase'] } }
##
# @ReplicationMode:
#
# An enumeration of replication modes.
#
# @primary: Primary mode, the vm's state will be sent to secondary
# QEMU.
#
# @secondary: Secondary mode, receive the vm's state from primary
# QEMU.
#
# Since: 2.9
##
{ 'enum' : 'ReplicationMode', 'data' : [ 'primary', 'secondary' ],
'if': 'CONFIG_REPLICATION' }
##
# @BlockdevOptionsReplication:
#
# Driver specific block device options for replication
#
# @mode: the replication mode
#
# @top-id: In secondary mode, node name or device ID of the root node
# who owns the replication node chain. Must not be given in
# primary mode.
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsReplication',
'base': 'BlockdevOptionsGenericFormat',
'data': { 'mode': 'ReplicationMode',
'*top-id': 'str' },
'if': 'CONFIG_REPLICATION' }
##
# @NFSTransport:
#
# An enumeration of NFS transport types
#
# @inet: TCP transport
#
# Since: 2.9
##
{ 'enum': 'NFSTransport',
'data': [ 'inet' ] }
##
# @NFSServer:
#
# Captures the address of the socket
#
# @type: transport type used for NFS (only TCP supported)
#
# @host: host address for NFS server
#
# Since: 2.9
##
{ 'struct': 'NFSServer',
'data': { 'type': 'NFSTransport',
'host': 'str' } }
##
# @BlockdevOptionsNfs:
#
# Driver specific block device option for NFS
#
# @server: host address
#
# @path: path of the image on the host
#
# @user: UID value to use when talking to the server (defaults to
# 65534 on Windows and getuid() on unix)
#
# @group: GID value to use when talking to the server (defaults to
# 65534 on Windows and getgid() in unix)
#
# @tcp-syn-count: number of SYNs during the session establishment
# (defaults to libnfs default)
#
# @readahead-size: set the readahead size in bytes (defaults to libnfs
# default)
#
# @page-cache-size: set the pagecache size in bytes (defaults to
# libnfs default)
#
# @debug: set the NFS debug level (max 2) (defaults to libnfs default)
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsNfs',
'data': { 'server': 'NFSServer',
'path': 'str',
'*user': 'int',
'*group': 'int',
'*tcp-syn-count': 'int',
'*readahead-size': 'int',
'*page-cache-size': 'int',
'*debug': 'int' } }
##
# @BlockdevOptionsCurlBase:
#
# Driver specific block device options shared by all protocols
# supported by the curl backend.
#
# @url: URL of the image file
#
# @readahead: Size of the read-ahead cache; must be a multiple of 512
# (defaults to 256 kB)
#
# @timeout: Timeout for connections, in seconds (defaults to 5)
#
# @username: Username for authentication (defaults to none)
#
# @password-secret: ID of a QCryptoSecret object providing a password
# for authentication (defaults to no password)
#
# @proxy-username: Username for proxy authentication (defaults to
# none)
#
# @proxy-password-secret: ID of a QCryptoSecret object providing a
# password for proxy authentication (defaults to no password)
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsCurlBase',
'data': { 'url': 'str',
'*readahead': 'int',
'*timeout': 'int',
'*username': 'str',
'*password-secret': 'str',
'*proxy-username': 'str',
'*proxy-password-secret': 'str' } }
##
# @BlockdevOptionsCurlHttp:
#
# Driver specific block device options for HTTP connections over the
# curl backend. URLs must start with "http://".
#
# @cookie: List of cookies to set; format is "name1=content1;
# name2=content2;" as explained by CURLOPT_COOKIE(3). Defaults to
# no cookies.
#
# @cookie-secret: ID of a QCryptoSecret object providing the cookie
# data in a secure way. See @cookie for the format. (since 2.10)
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsCurlHttp',
'base': 'BlockdevOptionsCurlBase',
'data': { '*cookie': 'str',
'*cookie-secret': 'str'} }
##
# @BlockdevOptionsCurlHttps:
#
# Driver specific block device options for HTTPS connections over the
# curl backend. URLs must start with "https://".
#
# @cookie: List of cookies to set; format is "name1=content1;
# name2=content2;" as explained by CURLOPT_COOKIE(3). Defaults to
# no cookies.
#
# @sslverify: Whether to verify the SSL certificate's validity
# (defaults to true)
#
# @cookie-secret: ID of a QCryptoSecret object providing the cookie
# data in a secure way. See @cookie for the format. (since 2.10)
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsCurlHttps',
'base': 'BlockdevOptionsCurlBase',
'data': { '*cookie': 'str',
'*sslverify': 'bool',
'*cookie-secret': 'str'} }
##
# @BlockdevOptionsCurlFtp:
#
# Driver specific block device options for FTP connections over the
# curl backend. URLs must start with "ftp://".
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsCurlFtp',
'base': 'BlockdevOptionsCurlBase',
'data': { } }
##
# @BlockdevOptionsCurlFtps:
#
# Driver specific block device options for FTPS connections over the
# curl backend. URLs must start with "ftps://".
#
# @sslverify: Whether to verify the SSL certificate's validity
# (defaults to true)
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsCurlFtps',
'base': 'BlockdevOptionsCurlBase',
'data': { '*sslverify': 'bool' } }
##
# @BlockdevOptionsNbd:
#
# Driver specific block device options for NBD.
#
# @server: NBD server address
#
# @export: export name
#
# @tls-creds: TLS credentials ID
#
# @tls-hostname: TLS hostname override for certificate validation
# (Since 7.0)
#
# @x-dirty-bitmap: A metadata context name such as
# "qemu:dirty-bitmap:NAME" or "qemu:allocation-depth" to query in
# place of the traditional "base:allocation" block status (see
# NBD_OPT_LIST_META_CONTEXT in the NBD protocol; and yes, naming
# this option x-context would have made more sense) (since 3.0)
#
# @reconnect-delay: On an unexpected disconnect, the nbd client tries
# to connect again until succeeding or encountering a serious
# error. During the first @reconnect-delay seconds, all requests
# are paused and will be rerun on a successful reconnect. After
# that time, any delayed requests and all future requests before a
# successful reconnect will immediately fail. Default 0 (Since
# 4.2)
#
# @open-timeout: In seconds. If zero, the nbd driver tries the
# connection only once, and fails to open if the connection fails.
# If non-zero, the nbd driver will repeat connection attempts
# until successful or until @open-timeout seconds have elapsed.
# Default 0 (Since 7.0)
#
# Features:
#
# @unstable: Member @x-dirty-bitmap is experimental.
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsNbd',
'data': { 'server': 'SocketAddress',
'*export': 'str',
'*tls-creds': 'str',
'*tls-hostname': 'str',
'*x-dirty-bitmap': { 'type': 'str', 'features': [ 'unstable' ] },
'*reconnect-delay': 'uint32',
'*open-timeout': 'uint32' } }
##
# @BlockdevOptionsRaw:
#
# Driver specific block device options for the raw driver.
#
# @offset: position where the block device starts
#
# @size: the assumed size of the device
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsRaw',
'base': 'BlockdevOptionsGenericFormat',
'data': { '*offset': 'int', '*size': 'int' } }
##
# @BlockdevOptionsThrottle:
#
# Driver specific block device options for the throttle driver
#
# @throttle-group: the name of the throttle-group object to use. It
# must already exist.
#
# @file: reference to or definition of the data source block device
#
# Since: 2.11
##
{ 'struct': 'BlockdevOptionsThrottle',
'data': { 'throttle-group': 'str',
'file' : 'BlockdevRef'
} }
##
# @BlockdevOptionsCor:
#
# Driver specific block device options for the copy-on-read driver.
#
# @bottom: The name of a non-filter node (allocation-bearing layer)
# that limits the COR operations in the backing chain (inclusive),
# so that no data below this node will be copied by this filter.
# If option is absent, the limit is not applied, so that data from
# all backing layers may be copied.
#
# Since: 6.0
##
{ 'struct': 'BlockdevOptionsCor',
'base': 'BlockdevOptionsGenericFormat',
'data': { '*bottom': 'str' } }
##
# @OnCbwError:
#
# An enumeration of possible behaviors for copy-before-write operation
# failures.
#
# @break-guest-write: report the error to the guest. This way, the
# guest will not be able to overwrite areas that cannot be backed
# up, so the backup process remains valid.
#
# @break-snapshot: continue guest write. Doing so will make the
# provided snapshot state invalid and any backup or export process
# based on it will finally fail.
#
# Since: 7.1
##
{ 'enum': 'OnCbwError',
'data': [ 'break-guest-write', 'break-snapshot' ] }
##
# @BlockdevOptionsCbw:
#
# Driver specific block device options for the copy-before-write
# driver, which does so called copy-before-write operations: when data
# is written to the filter, the filter first reads corresponding
# blocks from its file child and copies them to @target child. After
# successfully copying, the write request is propagated to file child.
# If copying fails, the original write request is failed too and no
# data is written to file child.
#
# @target: The target for copy-before-write operations.
#
# @bitmap: If specified, copy-before-write filter will do
# copy-before-write operations only for dirty regions of the
# bitmap. Bitmap size must be equal to length of file and target
# child of the filter. Note also, that bitmap is used only to
# initialize internal bitmap of the process, so further
# modifications (or removing) of specified bitmap doesn't
# influence the filter. (Since 7.0)
#
# @on-cbw-error: Behavior on failure of copy-before-write operation.
# Default is @break-guest-write. (Since 7.1)
#
# @cbw-timeout: Zero means no limit. Non-zero sets the timeout in
# seconds for copy-before-write operation. When a timeout occurs,
# the respective copy-before-write operation will fail, and the
# @on-cbw-error parameter will decide how this failure is handled.
# Default 0. (Since 7.1)
#
# Since: 6.2
##
{ 'struct': 'BlockdevOptionsCbw',
'base': 'BlockdevOptionsGenericFormat',
'data': { 'target': 'BlockdevRef', '*bitmap': 'BlockDirtyBitmap',
'*on-cbw-error': 'OnCbwError', '*cbw-timeout': 'uint32' } }
##
# @BlockdevOptions:
#
# Options for creating a block device. Many options are available for
# all block devices, independent of the block driver:
#
# @driver: block driver name
#
# @node-name: the node name of the new node (Since 2.0). This option
# is required on the top level of blockdev-add. Valid node names
# start with an alphabetic character and may contain only
# alphanumeric characters, '-', '.' and '_'. Their maximum length
# is 31 characters.
#
# @discard: discard-related options (default: ignore)
#
# @cache: cache-related options
#
# @read-only: whether the block device should be read-only (default:
# false). Note that some block drivers support only read-only
# access, either generally or in certain configurations. In this
# case, the default value does not work and the option must be
# specified explicitly.
#
# @auto-read-only: if true and @read-only is false, QEMU may
# automatically decide not to open the image read-write as
# requested, but fall back to read-only instead (and switch
# between the modes later), e.g. depending on whether the image
# file is writable or whether a writing user is attached to the
# node (default: false, since 3.1)
#
# @detect-zeroes: detect and optimize zero writes (Since 2.1)
# (default: off)
#
# @force-share: force share all permission on added nodes. Requires
# read-only=true. (Since 2.10)
#
# Remaining options are determined by the block driver.
#
# Since: 2.9
##
{ 'union': 'BlockdevOptions',
'base': { 'driver': 'BlockdevDriver',
'*node-name': 'str',
'*discard': 'BlockdevDiscardOptions',
'*cache': 'BlockdevCacheOptions',
'*read-only': 'bool',
'*auto-read-only': 'bool',
'*force-share': 'bool',
'*detect-zeroes': 'BlockdevDetectZeroesOptions' },
'discriminator': 'driver',
'data': {
'blkdebug': 'BlockdevOptionsBlkdebug',
'blklogwrites':'BlockdevOptionsBlklogwrites',
'blkverify': 'BlockdevOptionsBlkverify',
'blkreplay': 'BlockdevOptionsBlkreplay',
'bochs': 'BlockdevOptionsGenericFormat',
'cloop': 'BlockdevOptionsGenericFormat',
'compress': 'BlockdevOptionsGenericFormat',
'copy-before-write':'BlockdevOptionsCbw',
'copy-on-read':'BlockdevOptionsCor',
'dmg': 'BlockdevOptionsGenericFormat',
'file': 'BlockdevOptionsFile',
'ftp': 'BlockdevOptionsCurlFtp',
'ftps': 'BlockdevOptionsCurlFtps',
'gluster': 'BlockdevOptionsGluster',
'host_cdrom': { 'type': 'BlockdevOptionsFile',
'if': 'HAVE_HOST_BLOCK_DEVICE' },
'host_device': { 'type': 'BlockdevOptionsFile',
'if': 'HAVE_HOST_BLOCK_DEVICE' },
'http': 'BlockdevOptionsCurlHttp',
'https': 'BlockdevOptionsCurlHttps',
'io_uring': { 'type': 'BlockdevOptionsIoUring',
'if': 'CONFIG_BLKIO' },
'iscsi': 'BlockdevOptionsIscsi',
'luks': 'BlockdevOptionsLUKS',
'nbd': 'BlockdevOptionsNbd',
'nfs': 'BlockdevOptionsNfs',
'null-aio': 'BlockdevOptionsNull',
'null-co': 'BlockdevOptionsNull',
'nvme': 'BlockdevOptionsNVMe',
'nvme-io_uring': { 'type': 'BlockdevOptionsNvmeIoUring',
'if': 'CONFIG_BLKIO' },
'parallels': 'BlockdevOptionsGenericFormat',
'preallocate':'BlockdevOptionsPreallocate',
'qcow2': 'BlockdevOptionsQcow2',
'qcow': 'BlockdevOptionsQcow',
'qed': 'BlockdevOptionsGenericCOWFormat',
'quorum': 'BlockdevOptionsQuorum',
'raw': 'BlockdevOptionsRaw',
'rbd': 'BlockdevOptionsRbd',
'replication': { 'type': 'BlockdevOptionsReplication',
'if': 'CONFIG_REPLICATION' },
'snapshot-access': 'BlockdevOptionsGenericFormat',
'ssh': 'BlockdevOptionsSsh',
'throttle': 'BlockdevOptionsThrottle',
'vdi': 'BlockdevOptionsGenericFormat',
'vhdx': 'BlockdevOptionsGenericFormat',
'virtio-blk-vfio-pci':
{ 'type': 'BlockdevOptionsVirtioBlkVfioPci',
'if': 'CONFIG_BLKIO' },
'virtio-blk-vhost-user':
{ 'type': 'BlockdevOptionsVirtioBlkVhostUser',
'if': 'CONFIG_BLKIO' },
'virtio-blk-vhost-vdpa':
{ 'type': 'BlockdevOptionsVirtioBlkVhostVdpa',
'if': 'CONFIG_BLKIO' },
'vmdk': 'BlockdevOptionsGenericCOWFormat',
'vpc': 'BlockdevOptionsGenericFormat',
'vvfat': 'BlockdevOptionsVVFAT'
} }
##
# @BlockdevRef:
#
# Reference to a block device.
#
# @definition: defines a new block device inline
#
# @reference: references the ID of an existing block device
#
# Since: 2.9
##
{ 'alternate': 'BlockdevRef',
'data': { 'definition': 'BlockdevOptions',
'reference': 'str' } }
##
# @BlockdevRefOrNull:
#
# Reference to a block device.
#
# @definition: defines a new block device inline
#
# @reference: references the ID of an existing block device. An empty
# string means that no block device should be referenced.
# Deprecated; use null instead.
#
# @null: No block device should be referenced (since 2.10)
#
# Since: 2.9
##
{ 'alternate': 'BlockdevRefOrNull',
'data': { 'definition': 'BlockdevOptions',
'reference': 'str',
'null': 'null' } }
##
# @blockdev-add:
#
# Creates a new block device.
#
# Since: 2.9
#
# Examples:
#
# -> { "execute": "blockdev-add",
# "arguments": {
# "driver": "qcow2",
# "node-name": "test1",
# "file": {
# "driver": "file",
# "filename": "test.qcow2"
# }
# }
# }
# <- { "return": {} }
#
# -> { "execute": "blockdev-add",
# "arguments": {
# "driver": "qcow2",
# "node-name": "node0",
# "discard": "unmap",
# "cache": {
# "direct": true
# },
# "file": {
# "driver": "file",
# "filename": "/tmp/test.qcow2"
# },
# "backing": {
# "driver": "raw",
# "file": {
# "driver": "file",
# "filename": "/dev/fdset/4"
# }
# }
# }
# }
#
# <- { "return": {} }
##
{ 'command': 'blockdev-add', 'data': 'BlockdevOptions', 'boxed': true,
'allow-preconfig': true }
##
# @blockdev-reopen:
#
# Reopens one or more block devices using the given set of options.
# Any option not specified will be reset to its default value
# regardless of its previous status. If an option cannot be changed
# or a particular driver does not support reopening then the command
# will return an error. All devices in the list are reopened in one
# transaction, so if one of them fails then the whole transaction is
# cancelled.
#
# The command receives a list of block devices to reopen. For each
# one of them, the top-level @node-name option (from BlockdevOptions)
# must be specified and is used to select the block device to be
# reopened. Other @node-name options must be either omitted or set to
# the current name of the appropriate node. This command won't change
# any node name and any attempt to do it will result in an error.
#
# In the case of options that refer to child nodes, the behavior of
# this command depends on the value:
#
# 1) A set of options (BlockdevOptions): the child is reopened with
# the specified set of options.
#
# 2) A reference to the current child: the child is reopened using
# its existing set of options.
#
# 3) A reference to a different node: the current child is replaced
# with the specified one.
#
# 4) NULL: the current child (if any) is detached.
#
# Options (1) and (2) are supported in all cases. Option (3) is
# supported for @file and @backing, and option (4) for @backing only.
#
# Unlike with blockdev-add, the @backing option must always be present
# unless the node being reopened does not have a backing file and its
# image does not have a default backing file name as part of its
# metadata.
#
# Since: 6.1
##
{ 'command': 'blockdev-reopen',
'data': { 'options': ['BlockdevOptions'] },
'allow-preconfig': true }
##
# @blockdev-del:
#
# Deletes a block device that has been added using blockdev-add. The
# command will fail if the node is attached to a device or is
# otherwise being used.
#
# @node-name: Name of the graph node to delete.
#
# Since: 2.9
#
# Example:
#
# -> { "execute": "blockdev-add",
# "arguments": {
# "driver": "qcow2",
# "node-name": "node0",
# "file": {
# "driver": "file",
# "filename": "test.qcow2"
# }
# }
# }
# <- { "return": {} }
#
# -> { "execute": "blockdev-del",
# "arguments": { "node-name": "node0" }
# }
# <- { "return": {} }
##
{ 'command': 'blockdev-del', 'data': { 'node-name': 'str' },
'allow-preconfig': true }
##
# @BlockdevCreateOptionsFile:
#
# Driver specific image creation options for file.
#
# @filename: Filename for the new image file
#
# @size: Size of the virtual disk in bytes
#
# @preallocation: Preallocation mode for the new image (default: off;
# allowed values: off, falloc (if CONFIG_POSIX_FALLOCATE), full
# (if CONFIG_POSIX))
#
# @nocow: Turn off copy-on-write (valid only on btrfs; default: off)
#
# @extent-size-hint: Extent size hint to add to the image file; 0 for
# not adding an extent size hint (default: 1 MB, since 5.1)
#
# Since: 2.12
##
{ 'struct': 'BlockdevCreateOptionsFile',
'data': { 'filename': 'str',
'size': 'size',
'*preallocation': 'PreallocMode',
'*nocow': 'bool',
'*extent-size-hint': 'size'} }
##
# @BlockdevCreateOptionsGluster:
#
# Driver specific image creation options for gluster.
#
# @location: Where to store the new image file
#
# @size: Size of the virtual disk in bytes
#
# @preallocation: Preallocation mode for the new image (default: off;
# allowed values: off, falloc (if CONFIG_GLUSTERFS_FALLOCATE),
# full (if CONFIG_GLUSTERFS_ZEROFILL))
#
# Since: 2.12
##
{ 'struct': 'BlockdevCreateOptionsGluster',
'data': { 'location': 'BlockdevOptionsGluster',
'size': 'size',
'*preallocation': 'PreallocMode' } }
##
# @BlockdevCreateOptionsLUKS:
#
# Driver specific image creation options for LUKS.
#
# @file: Node to create the image format on
#
# @size: Size of the virtual disk in bytes
#
# @preallocation: Preallocation mode for the new image (since: 4.2)
# (default: off; allowed values: off, metadata, falloc, full)
#
# Since: 2.12
##
{ 'struct': 'BlockdevCreateOptionsLUKS',
'base': 'QCryptoBlockCreateOptionsLUKS',
'data': { 'file': 'BlockdevRef',
'size': 'size',
'*preallocation': 'PreallocMode' } }
##
# @BlockdevCreateOptionsNfs:
#
# Driver specific image creation options for NFS.
#
# @location: Where to store the new image file
#
# @size: Size of the virtual disk in bytes
#
# Since: 2.12
##
{ 'struct': 'BlockdevCreateOptionsNfs',
'data': { 'location': 'BlockdevOptionsNfs',
'size': 'size' } }
##
# @BlockdevCreateOptionsParallels:
#
# Driver specific image creation options for parallels.
#
# @file: Node to create the image format on
#
# @size: Size of the virtual disk in bytes
#
# @cluster-size: Cluster size in bytes (default: 1 MB)
#
# Since: 2.12
##
{ 'struct': 'BlockdevCreateOptionsParallels',
'data': { 'file': 'BlockdevRef',
'size': 'size',
'*cluster-size': 'size' } }
##
# @BlockdevCreateOptionsQcow:
#
# Driver specific image creation options for qcow.
#
# @file: Node to create the image format on
#
# @size: Size of the virtual disk in bytes
#
# @backing-file: File name of the backing file if a backing file
# should be used
#
# @encrypt: Encryption options if the image should be encrypted
#
# Since: 2.12
##
{ 'struct': 'BlockdevCreateOptionsQcow',
'data': { 'file': 'BlockdevRef',
'size': 'size',
'*backing-file': 'str',
'*encrypt': 'QCryptoBlockCreateOptions' } }
##
# @BlockdevQcow2Version:
#
# @v2: The original QCOW2 format as introduced in qemu 0.10 (version
# 2)
#
# @v3: The extended QCOW2 format as introduced in qemu 1.1 (version 3)
#
# Since: 2.12
##
{ 'enum': 'BlockdevQcow2Version',
'data': [ 'v2', 'v3' ] }
##
# @Qcow2CompressionType:
#
# Compression type used in qcow2 image file
#
# @zlib: zlib compression, see <http://zlib.net/>
#
# @zstd: zstd compression, see <http://github.com/facebook/zstd>
#
# Since: 5.1
##
{ 'enum': 'Qcow2CompressionType',
'data': [ 'zlib', { 'name': 'zstd', 'if': 'CONFIG_ZSTD' } ] }
##
# @BlockdevCreateOptionsQcow2:
#
# Driver specific image creation options for qcow2.
#
# @file: Node to create the image format on
#
# @data-file: Node to use as an external data file in which all guest
# data is stored so that only metadata remains in the qcow2 file
# (since: 4.0)
#
# @data-file-raw: True if the external data file must stay valid as a
# standalone (read-only) raw image without looking at qcow2
# metadata (default: false; since: 4.0)
#
# @extended-l2: True to make the image have extended L2 entries
# (default: false; since 5.2)
#
# @size: Size of the virtual disk in bytes
#
# @version: Compatibility level (default: v3)
#
# @backing-file: File name of the backing file if a backing file
# should be used
#
# @backing-fmt: Name of the block driver to use for the backing file
#
# @encrypt: Encryption options if the image should be encrypted
#
# @cluster-size: qcow2 cluster size in bytes (default: 65536)
#
# @preallocation: Preallocation mode for the new image (default: off;
# allowed values: off, falloc, full, metadata)
#
# @lazy-refcounts: True if refcounts may be updated lazily
# (default: off)
#
# @refcount-bits: Width of reference counts in bits (default: 16)
#
# @compression-type: The image cluster compression method
# (default: zlib, since 5.1)
#
# Since: 2.12
##
{ 'struct': 'BlockdevCreateOptionsQcow2',
'data': { 'file': 'BlockdevRef',
'*data-file': 'BlockdevRef',
'*data-file-raw': 'bool',
'*extended-l2': 'bool',
'size': 'size',
'*version': 'BlockdevQcow2Version',
'*backing-file': 'str',
'*backing-fmt': 'BlockdevDriver',
'*encrypt': 'QCryptoBlockCreateOptions',
'*cluster-size': 'size',
'*preallocation': 'PreallocMode',
'*lazy-refcounts': 'bool',
'*refcount-bits': 'int',
'*compression-type':'Qcow2CompressionType' } }
##
# @BlockdevCreateOptionsQed:
#
# Driver specific image creation options for qed.
#
# @file: Node to create the image format on
#
# @size: Size of the virtual disk in bytes
#
# @backing-file: File name of the backing file if a backing file
# should be used
#
# @backing-fmt: Name of the block driver to use for the backing file
#
# @cluster-size: Cluster size in bytes (default: 65536)
#
# @table-size: L1/L2 table size (in clusters)
#
# Since: 2.12
##
{ 'struct': 'BlockdevCreateOptionsQed',
'data': { 'file': 'BlockdevRef',
'size': 'size',
'*backing-file': 'str',
'*backing-fmt': 'BlockdevDriver',
'*cluster-size': 'size',
'*table-size': 'int' } }
##
# @BlockdevCreateOptionsRbd:
#
# Driver specific image creation options for rbd/Ceph.
#
# @location: Where to store the new image file. This location cannot
# point to a snapshot.
#
# @size: Size of the virtual disk in bytes
#
# @cluster-size: RBD object size
#
# @encrypt: Image encryption options. (Since 6.1)
#
# Since: 2.12
##
{ 'struct': 'BlockdevCreateOptionsRbd',
'data': { 'location': 'BlockdevOptionsRbd',
'size': 'size',
'*cluster-size' : 'size',
'*encrypt' : 'RbdEncryptionCreateOptions' } }
##
# @BlockdevVmdkSubformat:
#
# Subformat options for VMDK images
#
# @monolithicSparse: Single file image with sparse cluster allocation
#
# @monolithicFlat: Single flat data image and a descriptor file
#
# @twoGbMaxExtentSparse: Data is split into 2GB (per virtual LBA)
# sparse extent files, in addition to a descriptor file
#
# @twoGbMaxExtentFlat: Data is split into 2GB (per virtual LBA) flat
# extent files, in addition to a descriptor file
#
# @streamOptimized: Single file image sparse cluster allocation,
# optimized for streaming over network.
#
# Since: 4.0
##
{ 'enum': 'BlockdevVmdkSubformat',
'data': [ 'monolithicSparse', 'monolithicFlat', 'twoGbMaxExtentSparse',
'twoGbMaxExtentFlat', 'streamOptimized'] }
##
# @BlockdevVmdkAdapterType:
#
# Adapter type info for VMDK images
#
# Since: 4.0
##
{ 'enum': 'BlockdevVmdkAdapterType',
'data': [ 'ide', 'buslogic', 'lsilogic', 'legacyESX'] }
##
# @BlockdevCreateOptionsVmdk:
#
# Driver specific image creation options for VMDK.
#
# @file: Where to store the new image file. This refers to the image
# file for monolithcSparse and streamOptimized format, or the
# descriptor file for other formats.
#
# @size: Size of the virtual disk in bytes
#
# @extents: Where to store the data extents. Required for
# monolithcFlat, twoGbMaxExtentSparse and twoGbMaxExtentFlat
# formats. For monolithicFlat, only one entry is required; for
# twoGbMaxExtent* formats, the number of entries required is
# calculated as extent_number = virtual_size / 2GB. Providing more
# extents than will be used is an error.
#
# @subformat: The subformat of the VMDK image. Default:
# "monolithicSparse".
#
# @backing-file: The path of backing file. Default: no backing file
# is used.
#
# @adapter-type: The adapter type used to fill in the descriptor.
# Default: ide.
#
# @hwversion: Hardware version. The meaningful options are "4" or
# "6". Default: "4".
#
# @toolsversion: VMware guest tools version. Default: "2147483647"
# (Since 6.2)
#
# @zeroed-grain: Whether to enable zeroed-grain feature for sparse
# subformats. Default: false.
#
# Since: 4.0
##
{ 'struct': 'BlockdevCreateOptionsVmdk',
'data': { 'file': 'BlockdevRef',
'size': 'size',
'*extents': ['BlockdevRef'],
'*subformat': 'BlockdevVmdkSubformat',
'*backing-file': 'str',
'*adapter-type': 'BlockdevVmdkAdapterType',
'*hwversion': 'str',
'*toolsversion': 'str',
'*zeroed-grain': 'bool' } }
##
# @BlockdevCreateOptionsSsh:
#
# Driver specific image creation options for SSH.
#
# @location: Where to store the new image file
#
# @size: Size of the virtual disk in bytes
#
# Since: 2.12
##
{ 'struct': 'BlockdevCreateOptionsSsh',
'data': { 'location': 'BlockdevOptionsSsh',
'size': 'size' } }
##
# @BlockdevCreateOptionsVdi:
#
# Driver specific image creation options for VDI.
#
# @file: Node to create the image format on
#
# @size: Size of the virtual disk in bytes
#
# @preallocation: Preallocation mode for the new image (default: off;
# allowed values: off, metadata)
#
# Since: 2.12
##
{ 'struct': 'BlockdevCreateOptionsVdi',
'data': { 'file': 'BlockdevRef',
'size': 'size',
'*preallocation': 'PreallocMode' } }
##
# @BlockdevVhdxSubformat:
#
# @dynamic: Growing image file
#
# @fixed: Preallocated fixed-size image file
#
# Since: 2.12
##
{ 'enum': 'BlockdevVhdxSubformat',
'data': [ 'dynamic', 'fixed' ] }
##
# @BlockdevCreateOptionsVhdx:
#
# Driver specific image creation options for vhdx.
#
# @file: Node to create the image format on
#
# @size: Size of the virtual disk in bytes
#
# @log-size: Log size in bytes, must be a multiple of 1 MB (default: 1
# MB)
#
# @block-size: Block size in bytes, must be a multiple of 1 MB and not
# larger than 256 MB (default: automatically choose a block size
# depending on the image size)
#
# @subformat: vhdx subformat (default: dynamic)
#
# @block-state-zero: Force use of payload blocks of type 'ZERO'.
# Non-standard, but default. Do not set to 'off' when using
# 'qemu-img convert' with subformat=dynamic.
#
# Since: 2.12
##
{ 'struct': 'BlockdevCreateOptionsVhdx',
'data': { 'file': 'BlockdevRef',
'size': 'size',
'*log-size': 'size',
'*block-size': 'size',
'*subformat': 'BlockdevVhdxSubformat',
'*block-state-zero': 'bool' } }
##
# @BlockdevVpcSubformat:
#
# @dynamic: Growing image file
#
# @fixed: Preallocated fixed-size image file
#
# Since: 2.12
##
{ 'enum': 'BlockdevVpcSubformat',
'data': [ 'dynamic', 'fixed' ] }
##
# @BlockdevCreateOptionsVpc:
#
# Driver specific image creation options for vpc (VHD).
#
# @file: Node to create the image format on
#
# @size: Size of the virtual disk in bytes
#
# @subformat: vhdx subformat (default: dynamic)
#
# @force-size: Force use of the exact byte size instead of rounding to
# the next size that can be represented in CHS geometry
# (default: false)
#
# Since: 2.12
##
{ 'struct': 'BlockdevCreateOptionsVpc',
'data': { 'file': 'BlockdevRef',
'size': 'size',
'*subformat': 'BlockdevVpcSubformat',
'*force-size': 'bool' } }
##
# @BlockdevCreateOptions:
#
# Options for creating an image format on a given node.
#
# @driver: block driver to create the image format
#
# Since: 2.12
##
{ 'union': 'BlockdevCreateOptions',
'base': {
'driver': 'BlockdevDriver' },
'discriminator': 'driver',
'data': {
'file': 'BlockdevCreateOptionsFile',
'gluster': 'BlockdevCreateOptionsGluster',
'luks': 'BlockdevCreateOptionsLUKS',
'nfs': 'BlockdevCreateOptionsNfs',
'parallels': 'BlockdevCreateOptionsParallels',
'qcow': 'BlockdevCreateOptionsQcow',
'qcow2': 'BlockdevCreateOptionsQcow2',
'qed': 'BlockdevCreateOptionsQed',
'rbd': 'BlockdevCreateOptionsRbd',
'ssh': 'BlockdevCreateOptionsSsh',
'vdi': 'BlockdevCreateOptionsVdi',
'vhdx': 'BlockdevCreateOptionsVhdx',
'vmdk': 'BlockdevCreateOptionsVmdk',
'vpc': 'BlockdevCreateOptionsVpc'
} }
##
# @blockdev-create:
#
# Starts a job to create an image format on a given node. The job is
# automatically finalized, but a manual job-dismiss is required.
#
# @job-id: Identifier for the newly created job.
#
# @options: Options for the image creation.
#
# Since: 3.0
##
{ 'command': 'blockdev-create',
'data': { 'job-id': 'str',
'options': 'BlockdevCreateOptions' },
'allow-preconfig': true }
##
# @BlockdevAmendOptionsLUKS:
#
# Driver specific image amend options for LUKS.
#
# Since: 5.1
##
{ 'struct': 'BlockdevAmendOptionsLUKS',
'base': 'QCryptoBlockAmendOptionsLUKS',
'data': { }
}
##
# @BlockdevAmendOptionsQcow2:
#
# Driver specific image amend options for qcow2. For now, only
# encryption options can be amended
#
# @encrypt: Encryption options to be amended
#
# Since: 5.1
##
{ 'struct': 'BlockdevAmendOptionsQcow2',
'data': { '*encrypt': 'QCryptoBlockAmendOptions' } }
##
# @BlockdevAmendOptions:
#
# Options for amending an image format
#
# @driver: Block driver of the node to amend.
#
# Since: 5.1
##
{ 'union': 'BlockdevAmendOptions',
'base': {
'driver': 'BlockdevDriver' },
'discriminator': 'driver',
'data': {
'luks': 'BlockdevAmendOptionsLUKS',
'qcow2': 'BlockdevAmendOptionsQcow2' } }
##
# @x-blockdev-amend:
#
# Starts a job to amend format specific options of an existing open
# block device The job is automatically finalized, but a manual
# job-dismiss is required.
#
# @job-id: Identifier for the newly created job.
#
# @node-name: Name of the block node to work on
#
# @options: Options (driver specific)
#
# @force: Allow unsafe operations, format specific For luks that
# allows erase of the last active keyslot (permanent loss of
# data), and replacement of an active keyslot (possible loss of
# data if IO error happens)
#
# Features:
#
# @unstable: This command is experimental.
#
# Since: 5.1
##
{ 'command': 'x-blockdev-amend',
'data': { 'job-id': 'str',
'node-name': 'str',
'options': 'BlockdevAmendOptions',
'*force': 'bool' },
'features': [ 'unstable' ],
'allow-preconfig': true }
##
# @BlockErrorAction:
#
# An enumeration of action that has been taken when a DISK I/O occurs
#
# @ignore: error has been ignored
#
# @report: error has been reported to the device
#
# @stop: error caused VM to be stopped
#
# Since: 2.1
##
{ 'enum': 'BlockErrorAction',
'data': [ 'ignore', 'report', 'stop' ] }
##
# @BLOCK_IMAGE_CORRUPTED:
#
# Emitted when a disk image is being marked corrupt. The image can be
# identified by its device or node name. The 'device' field is always
# present for compatibility reasons, but it can be empty ("") if the
# image does not have a device name associated.
#
# @device: device name. This is always present for compatibility
# reasons, but it can be empty ("") if the image does not have a
# device name associated.
#
# @node-name: node name (Since: 2.4)
#
# @msg: informative message for human consumption, such as the kind of
# corruption being detected. It should not be parsed by machine
# as it is not guaranteed to be stable
#
# @offset: if the corruption resulted from an image access, this is
# the host's access offset into the image
#
# @size: if the corruption resulted from an image access, this is the
# access size
#
# @fatal: if set, the image is marked corrupt and therefore unusable
# after this event and must be repaired (Since 2.2; before, every
# BLOCK_IMAGE_CORRUPTED event was fatal)
#
# Note: If action is "stop", a STOP event will eventually follow the
# BLOCK_IO_ERROR event.
#
# Example:
#
# <- { "event": "BLOCK_IMAGE_CORRUPTED",
# "data": { "device": "", "node-name": "drive", "fatal": false,
# "msg": "L2 table offset 0x2a2a2a00 unaligned (L1 index: 0)" },
# "timestamp": { "seconds": 1648243240, "microseconds": 906060 } }
#
# Since: 1.7
##
{ 'event': 'BLOCK_IMAGE_CORRUPTED',
'data': { 'device' : 'str',
'*node-name' : 'str',
'msg' : 'str',
'*offset' : 'int',
'*size' : 'int',
'fatal' : 'bool' } }
##
# @BLOCK_IO_ERROR:
#
# Emitted when a disk I/O error occurs
#
# @device: device name. This is always present for compatibility
# reasons, but it can be empty ("") if the image does not have a
# device name associated.
#
# @node-name: node name. Note that errors may be reported for the
# root node that is directly attached to a guest device rather
# than for the node where the error occurred. The node name is
# not present if the drive is empty. (Since: 2.8)
#
# @operation: I/O operation
#
# @action: action that has been taken
#
# @nospace: true if I/O error was caused due to a no-space condition.
# This key is only present if query-block's io-status is present,
# please see query-block documentation for more information
# (since: 2.2)
#
# @reason: human readable string describing the error cause. (This
# field is a debugging aid for humans, it should not be parsed by
# applications) (since: 2.2)
#
# Note: If action is "stop", a STOP event will eventually follow the
# BLOCK_IO_ERROR event
#
# Since: 0.13
#
# Example:
#
# <- { "event": "BLOCK_IO_ERROR",
# "data": { "device": "ide0-hd1",
# "node-name": "#block212",
# "operation": "write",
# "action": "stop",
# "reason": "No space left on device" },
# "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
##
{ 'event': 'BLOCK_IO_ERROR',
'data': { 'device': 'str', '*node-name': 'str',
'operation': 'IoOperationType',
'action': 'BlockErrorAction', '*nospace': 'bool',
'reason': 'str' } }
##
# @BLOCK_JOB_COMPLETED:
#
# Emitted when a block job has completed
#
# @type: job type
#
# @device: The job identifier. Originally the device name but other
# values are allowed since QEMU 2.7
#
# @len: maximum progress value
#
# @offset: current progress value. On success this is equal to len.
# On failure this is less than len
#
# @speed: rate limit, bytes per second
#
# @error: error message. Only present on failure. This field
# contains a human-readable error message. There are no semantics
# other than that streaming has failed and clients should not try
# to interpret the error string
#
# Since: 1.1
#
# Example:
#
# <- { "event": "BLOCK_JOB_COMPLETED",
# "data": { "type": "stream", "device": "virtio-disk0",
# "len": 10737418240, "offset": 10737418240,
# "speed": 0 },
# "timestamp": { "seconds": 1267061043, "microseconds": 959568 } }
##
{ 'event': 'BLOCK_JOB_COMPLETED',
'data': { 'type' : 'JobType',
'device': 'str',
'len' : 'int',
'offset': 'int',
'speed' : 'int',
'*error': 'str' } }
##
# @BLOCK_JOB_CANCELLED:
#
# Emitted when a block job has been cancelled
#
# @type: job type
#
# @device: The job identifier. Originally the device name but other
# values are allowed since QEMU 2.7
#
# @len: maximum progress value
#
# @offset: current progress value. On success this is equal to len.
# On failure this is less than len
#
# @speed: rate limit, bytes per second
#
# Since: 1.1
#
# Example:
#
# <- { "event": "BLOCK_JOB_CANCELLED",
# "data": { "type": "stream", "device": "virtio-disk0",
# "len": 10737418240, "offset": 134217728,
# "speed": 0 },
# "timestamp": { "seconds": 1267061043, "microseconds": 959568 } }
##
{ 'event': 'BLOCK_JOB_CANCELLED',
'data': { 'type' : 'JobType',
'device': 'str',
'len' : 'int',
'offset': 'int',
'speed' : 'int' } }
##
# @BLOCK_JOB_ERROR:
#
# Emitted when a block job encounters an error
#
# @device: The job identifier. Originally the device name but other
# values are allowed since QEMU 2.7
#
# @operation: I/O operation
#
# @action: action that has been taken
#
# Since: 1.3
#
# Example:
#
# <- { "event": "BLOCK_JOB_ERROR",
# "data": { "device": "ide0-hd1",
# "operation": "write",
# "action": "stop" },
# "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
##
{ 'event': 'BLOCK_JOB_ERROR',
'data': { 'device' : 'str',
'operation': 'IoOperationType',
'action' : 'BlockErrorAction' } }
##
# @BLOCK_JOB_READY:
#
# Emitted when a block job is ready to complete
#
# @type: job type
#
# @device: The job identifier. Originally the device name but other
# values are allowed since QEMU 2.7
#
# @len: maximum progress value
#
# @offset: current progress value. On success this is equal to len.
# On failure this is less than len
#
# @speed: rate limit, bytes per second
#
# Note: The "ready to complete" status is always reset by a
# @BLOCK_JOB_ERROR event
#
# Since: 1.3
#
# Example:
#
# <- { "event": "BLOCK_JOB_READY",
# "data": { "device": "drive0", "type": "mirror", "speed": 0,
# "len": 2097152, "offset": 2097152 },
# "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
##
{ 'event': 'BLOCK_JOB_READY',
'data': { 'type' : 'JobType',
'device': 'str',
'len' : 'int',
'offset': 'int',
'speed' : 'int' } }
##
# @BLOCK_JOB_PENDING:
#
# Emitted when a block job is awaiting explicit authorization to
# finalize graph changes via @block-job-finalize. If this job is part
# of a transaction, it will not emit this event until the transaction
# has converged first.
#
# @type: job type
#
# @id: The job identifier.
#
# Since: 2.12
#
# Example:
#
# <- { "event": "BLOCK_JOB_PENDING",
# "data": { "type": "mirror", "id": "backup_1" },
# "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
##
{ 'event': 'BLOCK_JOB_PENDING',
'data': { 'type' : 'JobType',
'id' : 'str' } }
##
# @PreallocMode:
#
# Preallocation mode of QEMU image file
#
# @off: no preallocation
#
# @metadata: preallocate only for metadata
#
# @falloc: like @full preallocation but allocate disk space by
# posix_fallocate() rather than writing data.
#
# @full: preallocate all data by writing it to the device to ensure
# disk space is really available. This data may or may not be
# zero, depending on the image format and storage. @full
# preallocation also sets up metadata correctly.
#
# Since: 2.2
##
{ 'enum': 'PreallocMode',
'data': [ 'off', 'metadata', 'falloc', 'full' ] }
##
# @BLOCK_WRITE_THRESHOLD:
#
# Emitted when writes on block device reaches or exceeds the
# configured write threshold. For thin-provisioned devices, this
# means the device should be extended to avoid pausing for disk
# exhaustion. The event is one shot. Once triggered, it needs to be
# re-registered with another block-set-write-threshold command.
#
# @node-name: graph node name on which the threshold was exceeded.
#
# @amount-exceeded: amount of data which exceeded the threshold, in
# bytes.
#
# @write-threshold: last configured threshold, in bytes.
#
# Since: 2.3
##
{ 'event': 'BLOCK_WRITE_THRESHOLD',
'data': { 'node-name': 'str',
'amount-exceeded': 'uint64',
'write-threshold': 'uint64' } }
##
# @block-set-write-threshold:
#
# Change the write threshold for a block drive. An event will be
# delivered if a write to this block drive crosses the configured
# threshold. The threshold is an offset, thus must be non-negative.
# Default is no write threshold. Setting the threshold to zero
# disables it.
#
# This is useful to transparently resize thin-provisioned drives
# without the guest OS noticing.
#
# @node-name: graph node name on which the threshold must be set.
#
# @write-threshold: configured threshold for the block device, bytes.
# Use 0 to disable the threshold.
#
# Since: 2.3
#
# Example:
#
# -> { "execute": "block-set-write-threshold",
# "arguments": { "node-name": "mydev",
# "write-threshold": 17179869184 } }
# <- { "return": {} }
##
{ 'command': 'block-set-write-threshold',
'data': { 'node-name': 'str', 'write-threshold': 'uint64' },
'allow-preconfig': true }
##
# @x-blockdev-change:
#
# Dynamically reconfigure the block driver state graph. It can be
# used to add, remove, insert or replace a graph node. Currently only
# the Quorum driver implements this feature to add or remove its
# child. This is useful to fix a broken quorum child.
#
# If @node is specified, it will be inserted under @parent. @child
# may not be specified in this case. If both @parent and @child are
# specified but @node is not, @child will be detached from @parent.
#
# @parent: the id or name of the parent node.
#
# @child: the name of a child under the given parent node.
#
# @node: the name of the node that will be added.
#
# Features:
#
# @unstable: This command is experimental, and its API is not stable.
# It does not support all kinds of operations, all kinds of
# children, nor all block drivers.
#
# FIXME Removing children from a quorum node means introducing
# gaps in the child indices. This cannot be represented in the
# 'children' list of BlockdevOptionsQuorum, as returned by
# .bdrv_refresh_filename().
#
# Warning: The data in a new quorum child MUST be consistent with
# that of the rest of the array.
#
# Since: 2.7
#
# Examples:
#
# 1. Add a new node to a quorum
#
# -> { "execute": "blockdev-add",
# "arguments": {
# "driver": "raw",
# "node-name": "new_node",
# "file": { "driver": "file",
# "filename": "test.raw" } } }
# <- { "return": {} }
# -> { "execute": "x-blockdev-change",
# "arguments": { "parent": "disk1",
# "node": "new_node" } }
# <- { "return": {} }
#
# 2. Delete a quorum's node
#
# -> { "execute": "x-blockdev-change",
# "arguments": { "parent": "disk1",
# "child": "children.1" } }
# <- { "return": {} }
##
{ 'command': 'x-blockdev-change',
'data' : { 'parent': 'str',
'*child': 'str',
'*node': 'str' },
'features': [ 'unstable' ],
'allow-preconfig': true }
##
# @x-blockdev-set-iothread:
#
# Move @node and its children into the @iothread. If @iothread is
# null then move @node and its children into the main loop.
#
# The node must not be attached to a BlockBackend.
#
# @node-name: the name of the block driver node
#
# @iothread: the name of the IOThread object or null for the main loop
#
# @force: true if the node and its children should be moved when a
# BlockBackend is already attached
#
# Features:
#
# @unstable: This command is experimental and intended for test cases
# that need control over IOThreads only.
#
# Since: 2.12
#
# Examples:
#
# 1. Move a node into an IOThread
#
# -> { "execute": "x-blockdev-set-iothread",
# "arguments": { "node-name": "disk1",
# "iothread": "iothread0" } }
# <- { "return": {} }
#
# 2. Move a node into the main loop
#
# -> { "execute": "x-blockdev-set-iothread",
# "arguments": { "node-name": "disk1",
# "iothread": null } }
# <- { "return": {} }
##
{ 'command': 'x-blockdev-set-iothread',
'data' : { 'node-name': 'str',
'iothread': 'StrOrNull',
'*force': 'bool' },
'features': [ 'unstable' ],
'allow-preconfig': true }
##
# @QuorumOpType:
#
# An enumeration of the quorum operation types
#
# @read: read operation
#
# @write: write operation
#
# @flush: flush operation
#
# Since: 2.6
##
{ 'enum': 'QuorumOpType',
'data': [ 'read', 'write', 'flush' ] }
##
# @QUORUM_FAILURE:
#
# Emitted by the Quorum block driver if it fails to establish a quorum
#
# @reference: device name if defined else node name
#
# @sector-num: number of the first sector of the failed read operation
#
# @sectors-count: failed read operation sector count
#
# Note: This event is rate-limited.
#
# Since: 2.0
#
# Example:
#
# <- { "event": "QUORUM_FAILURE",
# "data": { "reference": "usr1", "sector-num": 345435, "sectors-count": 5 },
# "timestamp": { "seconds": 1344522075, "microseconds": 745528 } }
##
{ 'event': 'QUORUM_FAILURE',
'data': { 'reference': 'str', 'sector-num': 'int', 'sectors-count': 'int' } }
##
# @QUORUM_REPORT_BAD:
#
# Emitted to report a corruption of a Quorum file
#
# @type: quorum operation type (Since 2.6)
#
# @error: error message. Only present on failure. This field
# contains a human-readable error message. There are no semantics
# other than that the block layer reported an error and clients
# should not try to interpret the error string.
#
# @node-name: the graph node name of the block driver state
#
# @sector-num: number of the first sector of the failed read operation
#
# @sectors-count: failed read operation sector count
#
# Note: This event is rate-limited.
#
# Since: 2.0
#
# Examples:
#
# 1. Read operation
#
# <- { "event": "QUORUM_REPORT_BAD",
# "data": { "node-name": "node0", "sector-num": 345435, "sectors-count": 5,
# "type": "read" },
# "timestamp": { "seconds": 1344522075, "microseconds": 745528 } }
#
# 2. Flush operation
#
# <- { "event": "QUORUM_REPORT_BAD",
# "data": { "node-name": "node0", "sector-num": 0, "sectors-count": 2097120,
# "type": "flush", "error": "Broken pipe" },
# "timestamp": { "seconds": 1456406829, "microseconds": 291763 } }
##
{ 'event': 'QUORUM_REPORT_BAD',
'data': { 'type': 'QuorumOpType', '*error': 'str', 'node-name': 'str',
'sector-num': 'int', 'sectors-count': 'int' } }
##
# @BlockdevSnapshotInternal:
#
# @device: the device name or node-name of a root node to generate the
# snapshot from
#
# @name: the name of the internal snapshot to be created
#
# Notes: In transaction, if @name is empty, or any snapshot matching
# @name exists, the operation will fail. Only some image formats
# support it, for example, qcow2, and rbd.
#
# Since: 1.7
##
{ 'struct': 'BlockdevSnapshotInternal',
'data': { 'device': 'str', 'name': 'str' } }
##
# @blockdev-snapshot-internal-sync:
#
# Synchronously take an internal snapshot of a block device, when the
# format of the image used supports it. If the name is an empty
# string, or a snapshot with name already exists, the operation will
# fail.
#
# For the arguments, see the documentation of
# BlockdevSnapshotInternal.
#
# Returns:
# - nothing on success
# - If @device is not a valid block device, GenericError
# - If any snapshot matching @name exists, or @name is empty,
# GenericError
# - If the format of the image used does not support it,
# GenericError
#
# Since: 1.7
#
# Example:
#
# -> { "execute": "blockdev-snapshot-internal-sync",
# "arguments": { "device": "ide-hd0",
# "name": "snapshot0" }
# }
# <- { "return": {} }
##
{ 'command': 'blockdev-snapshot-internal-sync',
'data': 'BlockdevSnapshotInternal',
'allow-preconfig': true }
##
# @blockdev-snapshot-delete-internal-sync:
#
# Synchronously delete an internal snapshot of a block device, when
# the format of the image used support it. The snapshot is identified
# by name or id or both. One of the name or id is required. Return
# SnapshotInfo for the successfully deleted snapshot.
#
# @device: the device name or node-name of a root node to delete the
# snapshot from
#
# @id: optional the snapshot's ID to be deleted
#
# @name: optional the snapshot's name to be deleted
#
# Returns:
# - SnapshotInfo on success
# - If @device is not a valid block device, GenericError
# - If snapshot not found, GenericError
# - If the format of the image used does not support it,
# GenericError
# - If @id and @name are both not specified, GenericError
#
# Since: 1.7
#
# Example:
#
# -> { "execute": "blockdev-snapshot-delete-internal-sync",
# "arguments": { "device": "ide-hd0",
# "name": "snapshot0" }
# }
# <- { "return": {
# "id": "1",
# "name": "snapshot0",
# "vm-state-size": 0,
# "date-sec": 1000012,
# "date-nsec": 10,
# "vm-clock-sec": 100,
# "vm-clock-nsec": 20,
# "icount": 220414
# }
# }
##
{ 'command': 'blockdev-snapshot-delete-internal-sync',
'data': { 'device': 'str', '*id': 'str', '*name': 'str'},
'returns': 'SnapshotInfo',
'allow-preconfig': true }
##
# @DummyBlockCoreForceArrays:
#
# Not used by QMP; hack to let us use BlockGraphInfoList internally
#
# Since: 8.0
##
{ 'struct': 'DummyBlockCoreForceArrays',
'data': { 'unused-block-graph-info': ['BlockGraphInfo'] } }
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