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qemu/qapi/block-core.json
Jean-Louis Dupond 42a2890a76 qcow2: add discard-no-unref option 
When we for example have a sparse qcow2 image and discard: unmap is enabled,
there can be a lot of fragmentation in the image after some time. Especially on VM's
that do a lot of writes/deletes.
This causes the qcow2 image to grow even over 110% of its virtual size,
because the free gaps in the image get too small to allocate new
continuous clusters. So it allocates new space at the end of the image.

Disabling discard is not an option, as discard is needed to keep the
incremental backup size as low as possible. Without discard, the
incremental backups would become large, as qemu thinks it's just dirty
blocks but it doesn't know the blocks are unneeded.
So we need to avoid fragmentation but also 'empty' the unneeded blocks in
the image to have a small incremental backup.

In addition, we also want to send the discards further down the stack, so
the underlying blocks are still discarded.

Therefor we introduce a new qcow2 option "discard-no-unref".
When setting this option to true, discards will no longer have the qcow2
driver relinquish cluster allocations. Other than that, the request is
handled as normal: All clusters in range are marked as zero, and, if
pass-discard-request is true, it is passed further down the stack.
The only difference is that the now-zero clusters are preallocated
instead of being unallocated.
This will avoid fragmentation on the qcow2 image.

Fixes: https://gitlab.com/qemu-project/qemu/-/issues/1621
Signed-off-by: Jean-Louis Dupond <jean-louis@dupond.be>
Message-Id: <20230605084523.34134-2-jean-louis@dupond.be>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
2023-06-05 13:15:42 +02:00

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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
#
# @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', '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.
# len(@bins) = len(@boundaries) + 1
# 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'] }
##
# @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
##
{ 'struct': 'BlockJobInfo',
'data': {'type': 'str', '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' } }
##
# @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 }
##
# @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, discards from the guest will not cause
# cluster allocations to be relinquished. This prevents qcow2 fragmentation
# that would be caused by such discards. 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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