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46b732cdf3
qemu/qapi/block-core.json
Pavel Butsykin 46b732cdf3 qcow2: add shrink image support 
This patch add shrinking of the image file for qcow2. As a result, this allows
us to reduce the virtual image size and free up space on the disk without
copying the image. Image can be fragmented and shrink is done by punching holes
in the image file.

Signed-off-by: Pavel Butsykin <pbutsykin@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20170918124230.8152-4-pbutsykin@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
2017-09-26 15:00:32 +02:00

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# -*- Mode: Python -*-
##
# == Block core (VM unrelated)
##
{ 'include': 'common.json' }
{ 'include': 'crypto.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
#
# 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' } }
##
# @ImageInfoSpecificQCow2EncryptionBase:
#
# @format: The encryption format
#
# Since: 2.10
##
{ 'struct': 'ImageInfoSpecificQCow2EncryptionBase',
'data': { 'format': 'BlockdevQcow2EncryptionFormat'}}
##
# @ImageInfoSpecificQCow2Encryption:
#
# Since: 2.10
##
{ 'union': 'ImageInfoSpecificQCow2Encryption',
'base': 'ImageInfoSpecificQCow2EncryptionBase',
'discriminator': 'format',
'data': { 'aes': 'QCryptoBlockInfoQCow',
'luks': 'QCryptoBlockInfoLUKS' } }
##
# @ImageInfoSpecificQCow2:
#
# @compat: compatibility level
#
# @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)
#
# Since: 1.7
##
{ 'struct': 'ImageInfoSpecificQCow2',
'data': {
'compat': 'str',
'*lazy-refcounts': 'bool',
'*corrupt': 'bool',
'refcount-bits': 'int',
'*encrypt': 'ImageInfoSpecificQCow2Encryption'
} }
##
# @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': ['ImageInfo']
} }
##
# @ImageInfoSpecific:
#
# A discriminated record of image format specific information structures.
#
# Since: 1.7
##
{ 'union': 'ImageInfoSpecific',
'data': {
'qcow2': 'ImageInfoSpecificQCow2',
'vmdk': 'ImageInfoSpecificVmdk',
# If we need to add block driver specific parameters for
# LUKS in future, then we'll subclass QCryptoBlockInfoLUKS
# to define a ImageInfoSpecificLUKS
'luks': 'QCryptoBlockInfoLUKS'
} }
##
# @ImageInfo:
#
# 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
#
# @backing-image: info of the backing image (since 1.6)
#
# @format-specific: structure supplying additional format-specific
# information (since 1.7)
#
# Since: 1.3
#
##
{ 'struct': 'ImageInfo',
'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'],
'*backing-image': 'ImageInfo',
'*format-specific': 'ImageInfoSpecific' } }
##
# @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: the start byte of the mapped virtual range
#
# @length: the number of bytes of the mapped virtual range
#
# @data: whether the mapped range has data
#
# @zero: whether the virtual blocks are zeroed
#
# @depth: the depth of the mapping
#
# @offset: the offset in file that the virtual sectors are mapped to
#
# @filename: filename that is referred to by @offset
#
# Since: 2.6
#
##
{ 'struct': 'MapEntry',
'data': {'start': 'int', 'length': 'int', 'data': 'bool',
'zero': 'bool', 'depth': 'int', '*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
# 0.14.0 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
#
# @encryption_key_missing: Deprecated; always false
#
# @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)
#
# Since: 0.14.0
#
##
{ 'struct': 'BlockDeviceInfo',
'data': { 'file': 'str', '*node-name': 'str', 'ro': 'bool', 'drv': 'str',
'*backing_file': 'str', 'backing_file_depth': 'int',
'encrypted': 'bool', 'encryption_key_missing': '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' } }
##
# @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' ] }
##
# @BlockDeviceMapEntry:
#
# Entry in the metadata map of the device (returned by "qemu-img map")
#
# @start: Offset in the image of the first byte described by this entry
# (in bytes)
#
# @length: Length of the range described by this entry (in bytes)
#
# @depth: Number of layers (0 = top image, 1 = top image's backing file, etc.)
# before reaching one for which the range is allocated. The value is
# in the range 0 to the depth of the image chain - 1.
#
# @zero: the sectors in this range read as zeros
#
# @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)
#
# @offset: if present, the image file stores the data for this range in
# raw format at the given offset.
#
# Since: 1.7
##
{ 'struct': 'BlockDeviceMapEntry',
'data': { 'start': 'int', 'length': 'int', 'depth': 'int', 'zero': 'bool',
'data': 'bool', '*offset': 'int' } }
##
# @DirtyBitmapStatus:
#
# An enumeration of possible states that a dirty bitmap can report to the user.
#
# @frozen: The bitmap is currently in-use by a backup operation or block job,
# and is immutable.
#
# @disabled: The bitmap is currently in-use by an internal operation and is
# read-only. It can still be deleted.
#
# @active: The bitmap is actively monitoring for new writes, and can be cleared,
# deleted, or used for backup operations.
#
# Since: 2.4
##
{ 'enum': 'DirtyBitmapStatus',
'data': ['active', 'disabled', 'frozen'] }
##
# @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)
#
# @status: current status of the dirty bitmap (since 2.4)
#
# Since: 1.3
##
{ 'struct': 'BlockDirtyInfo',
'data': {'*name': 'str', 'count': 'int', 'granularity': 'uint32',
'status': 'DirtyBitmapStatus'} }
##
# @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)
#
# @dirty-bitmaps: dirty bitmaps information (only present if the
# driver has one or more dirty bitmaps) (Since 2.0)
#
# @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: 0.14.0
##
{ 'struct': 'BlockInfo',
'data': {'device': 'str', '*qdev': 'str', 'type': 'str', 'removable': 'bool',
'locked': 'bool', '*inserted': 'BlockDeviceInfo',
'*tray_open': 'bool', '*io-status': 'BlockDeviceIoStatus',
'*dirty-bitmaps': ['BlockDirtyInfo'] } }
##
# @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 bitmap creation, may
# require additional space and is not covered here.
#
# @required: Size required for a new image file, in bytes.
#
# @fully-allocated: Image file size, in bytes, once data has been written
# to all sectors.
#
# Since: 2.10
##
{ 'struct': 'BlockMeasureInfo',
'data': {'required': 'int', 'fully-allocated': '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: 0.14.0
#
# 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'] }
##
# @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_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_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_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.
#
# 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_flush_latency_ns': 'int',
'max_flush_latency_ns': 'int', 'avg_flush_latency_ns': 'int',
'avg_rd_queue_depth': 'number', 'avg_wr_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.
#
# @rd_operations: The number of read operations performed by the device.
#
# @wr_operations: The number of write operations performed by the device.
#
# @flush_operations: The number of cache flush operations performed by the
# device (since 0.15.0)
#
# @flush_total_time_ns: Total time spend on cache flushes in nano-seconds
# (since 0.15.0).
#
# @wr_total_time_ns: Total time spend on writes in nano-seconds (since 0.15.0).
#
# @rd_total_time_ns: Total_time_spend on reads in nano-seconds (since 0.15.0).
#
# @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).
#
# @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_flush_operations: The number of failed flush operations
# performed by the device (Since 2.5)
#
# @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_flush_operations: The number of invalid flush operations
# performed by the device (Since 2.5)
#
# @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)
#
# Since: 0.14.0
##
{ 'struct': 'BlockDeviceStats',
'data': {'rd_bytes': 'int', 'wr_bytes': 'int', 'rd_operations': 'int',
'wr_operations': 'int', 'flush_operations': 'int',
'flush_total_time_ns': 'int', 'wr_total_time_ns': 'int',
'rd_total_time_ns': 'int', 'wr_highest_offset': 'int',
'rd_merged': 'int', 'wr_merged': 'int', '*idle_time_ns': 'int',
'failed_rd_operations': 'int', 'failed_wr_operations': 'int',
'failed_flush_operations': 'int', 'invalid_rd_operations': 'int',
'invalid_wr_operations': 'int', 'invalid_flush_operations': 'int',
'account_invalid': 'bool', 'account_failed': 'bool',
'timed_stats': ['BlockDeviceTimedStats'] } }
##
# @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)
#
# @stats: A @BlockDeviceStats for the device.
#
# @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: 0.14.0
##
{ 'struct': 'BlockStats',
'data': {'*device': 'str', '*node-name': 'str',
'stats': 'BlockDeviceStats',
'*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: 0.14.0
#
# 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
# }
# },
# {
# "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
# }
# },
# {
# "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
# }
# },
# {
# "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'] }
##
# @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)
#
# @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
#
# Since: 1.3
##
{ 'enum': 'MirrorSyncMode',
'data': ['top', 'full', 'none', 'incremental'] }
##
# @BlockJobType:
#
# Type of a block job.
#
# @commit: block commit job type, see "block-commit"
#
# @stream: block stream job type, see "block-stream"
#
# @mirror: drive mirror job type, see "drive-mirror"
#
# @backup: drive backup job type, see "drive-backup"
#
# Since: 1.7
##
{ 'enum': 'BlockJobType',
'data': ['commit', 'stream', 'mirror', 'backup'] }
##
# @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: the maximum progress value
#
# @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.
#
# @offset: the current progress value
#
# @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)
#
# 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'} }
##
# @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'] }
##
# @block_passwd:
#
# This command sets the password of a block device that has not been open
# with a password and requires one.
#
# This command is now obsolete and will always return an error since 2.10
#
##
{ 'command': 'block_passwd', 'data': {'*device': 'str',
'*node-name': 'str', 'password': 'str'} }
##
# @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: 0.14.0
#
# Example:
#
# -> { "execute": "block_resize",
# "arguments": { "device": "scratch", "size": 1073741824 } }
# <- { "return": {} }
#
##
{ 'command': 'block_resize', 'data': { '*device': 'str',
'*node-name': 'str',
'size': 'int' }}
##
# @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 generate the snapshot from.
#
# @node-name: graph node name to generate the snapshot from (Since 2.0)
#
# @snapshot-file: the target of the new image. If the file exists, or
# if it is a device, the snapshot 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 snapshot 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 created.
#
# @overlay: reference to the existing block device that will become
# the overlay of @node, as part of creating the snapshot.
# It must not have a current backing file (this can be
# achieved by passing "backing": "" to blockdev-add).
#
# Since: 2.5
##
{ 'struct': 'BlockdevSnapshot',
'data': { 'node': 'str', 'overlay': 'str' } }
##
# @DriveBackup:
#
# @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.
#
# @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
#
# @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).
#
# @mode: whether and how QEMU should create a new image, default is
# 'absolute-paths'.
#
# @speed: the maximum speed, in bytes per second
#
# @bitmap: the name of dirty bitmap if sync is "incremental".
# Must be present if sync is "incremental", must NOT be present
# otherwise. (Since 2.4)
#
# @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).
#
# 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: 1.6
##
{ 'struct': 'DriveBackup',
'data': { '*job-id': 'str', 'device': 'str', 'target': 'str',
'*format': 'str', 'sync': 'MirrorSyncMode', '*mode': 'NewImageMode',
'*speed': 'int', '*bitmap': 'str', '*compress': 'bool',
'*on-source-error': 'BlockdevOnError',
'*on-target-error': 'BlockdevOnError' } }
##
# @BlockdevBackup:
#
# @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.
#
# @target: the device name or node-name of the backup target node.
#
# @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).
#
# @speed: the maximum speed, in bytes per second. The default is 0,
# for unlimited.
#
# @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).
#
# 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: 2.3
##
{ 'struct': 'BlockdevBackup',
'data': { '*job-id': 'str', 'device': 'str', 'target': 'str',
'sync': 'MirrorSyncMode',
'*speed': 'int',
'*compress': 'bool',
'*on-source-error': 'BlockdevOnError',
'*on-target-error': 'BlockdevOnError' } }
##
# @blockdev-snapshot-sync:
#
# Generates 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: 0.14.0
#
# Example:
#
# -> { "execute": "blockdev-snapshot-sync",
# "arguments": { "device": "ide-hd0",
# "snapshot-file":
# "/some/place/my-image",
# "format": "qcow2" } }
# <- { "return": {} }
#
##
{ 'command': 'blockdev-snapshot-sync',
'data': 'BlockdevSnapshotSync' }
##
# @blockdev-snapshot:
#
# Generates a snapshot of a block device.
#
# Create 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.
#
# Since: 2.5
#
# Example:
#
# -> { "execute": "blockdev-add",
# "arguments": { "driver": "qcow2",
# "node-name": "node1534",
# "file": { "driver": "file",
# "filename": "hd1.qcow2" },
# "backing": "" } }
#
# <- { "return": {} }
#
# -> { "execute": "blockdev-snapshot",
# "arguments": { "node": "ide-hd0",
# "overlay": "node1534" } }
# <- { "return": {} }
#
##
{ 'command': 'blockdev-snapshot',
'data': 'BlockdevSnapshot' }
##
# @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' } }
##
# @block-commit:
#
# Live commit of data from overlay image nodes into backing nodes - i.e.,
# writes data between 'top' and 'base' into 'base'.
#
# @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: The file name of the backing image to write data into.
# If not specified, this is the deepest backing image.
#
# @top: The file 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.
#
# @backing-file: The backing file string to write into the overlay
# image of 'top'. If 'top' is the active layer,
# 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)
#
# If top == base, that is an error.
# If top == active, the job will not be completed by itself,
# 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.
#
# @speed: the maximum speed, in bytes per second
#
# @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)
#
# Returns: Nothing on success
# If commit or stream is already active on this device, DeviceInUse
# If @device does not exist, DeviceNotFound
# If image commit is not supported by this device, NotSupported
# If @base or @top is invalid, a generic error is returned
# If @speed is invalid, InvalidParameter
#
# 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': 'str', '*top': 'str',
'*backing-file': 'str', '*speed': 'int',
'*filter-node-name': 'str' } }
##
# @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.
#
# 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' }
##
# @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' }
##
# @query-named-block-nodes:
#
# Get the named block driver list
#
# 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,
# "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' ] }
##
# @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' }
##
# @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. (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)
#
# 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' } }
##
# @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
#
# @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)
#
# @autoload: the bitmap will be automatically loaded when the image it is stored
# in is opened. This flag may only be specified for persistent
# bitmaps. Default is false for block-dirty-bitmap-add. (Since: 2.10)
#
# Since: 2.4
##
{ 'struct': 'BlockDirtyBitmapAdd',
'data': { 'node': 'str', 'name': 'str', '*granularity': 'uint32',
'*persistent': 'bool', '*autoload': 'bool' } }
##
# @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' }
##
# @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' }
##
# @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' }
##
# @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
#
# 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' }
##
# @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.
#
# @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)
#
# 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' } }
##
# @block_set_io_throttle:
#
# Change I/O throttle limits for a block drive.
#
# Since QEMU 2.4, each device with I/O limits is member of a throttle
# group.
#
# If two or more devices are members of the same group, the limits
# will apply to the combined I/O of the whole group in a round-robin
# fashion. Therefore, setting new I/O limits to a device will affect
# the whole group.
#
# The name of the group can be specified using the 'group' parameter.
# If the parameter is unset, it is assumed to be the current group of
# that device. If it's not in any group yet, the name of the device
# will be used as the name for its group.
#
# The 'group' parameter can also be used to move a device to a
# different group. In this case the limits specified in the parameters
# will be applied to the new group only.
#
# I/O limits can be disabled by setting all of them to 0. In this case
# the device will be removed from its group and the rest of its
# members will not be affected. The 'group' parameter is ignored.
#
# Returns: Nothing on success
# If @device is not a valid block device, DeviceNotFound
#
# Since: 1.1
#
# Example:
#
# -> { "execute": "block_set_io_throttle",
# "arguments": { "id": "ide0-1-0",
# "bps": 1000000,
# "bps_rd": 0,
# "bps_wr": 0,
# "iops": 0,
# "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,
# "bps_max_length": 60,
# "iops_size": 0 } }
# <- { "return": {} }
##
{ 'command': 'block_set_io_throttle', 'boxed': true,
'data': 'BlockIOThrottle' }
##
# @BlockIOThrottle:
#
# A set of parameters describing block throttling.
#
# @device: Block device name (deprecated, use @id instead)
#
# @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)
#
# Since: 1.1
##
{ 'struct': 'BlockIOThrottle',
'data': { '*device': 'str', '*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' } }
##
# @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. When streaming completes the image file will have the base
# file as its backing file. This can be used to stream a subset of the backing
# file chain instead of flattening the entire image.
#
# On successful completion the image file is updated to drop the backing file
# and the BLOCK_JOB_COMPLETED event is emitted.
#
# @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 is also set.
#
# @base-node: the node name of the backing file.
# It cannot be set if @base is also set. (Since 2.8)
#
# @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.
#
# 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', '*speed': 'int',
'*on-error': 'BlockdevOnError' } }
##
# @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' } }
##
# @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.
#
# 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: whether to allow cancellation of a paused job (default
# false). 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' } }
##
# @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. Pausing an already paused job has no cumulative
# effect; a single block-job-resume command will resume the job.
#
# 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' } }
##
# @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. Resuming an already running job is not an error.
#
# 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' } }
##
# @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' } }
##
# @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)
#
# Since: 2.9
##
{ 'enum': 'BlockdevAioOptions',
'data': [ 'threads', 'native' ] }
##
# @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.
#
# @vxhs: Since 2.10
# @throttle: Since 2.11
#
# Since: 2.9
##
{ 'enum': 'BlockdevDriver',
'data': [ 'blkdebug', 'blkverify', 'bochs', 'cloop',
'dmg', 'file', 'ftp', 'ftps', 'gluster', 'host_cdrom',
'host_device', 'http', 'https', 'iscsi', 'luks', 'nbd', 'nfs',
'null-aio', 'null-co', 'parallels', 'qcow', 'qcow2', 'qed',
'quorum', 'raw', 'rbd', 'replication', 'sheepdog', 'ssh',
'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat', 'vxhs' ] }
##
# @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)
# @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)
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsFile',
'data': { 'filename': 'str',
'*pr-manager': 'str',
'*locking': 'OnOffAuto',
'*aio': 'BlockdevAioOptions' } }
##
# @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)
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsNull',
'data': { '*size': 'int', '*latency-ns': 'uint64' } }
##
# @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'
#
# 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' } }
##
# @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 venctors
#
# Since: 2.10
##
{ 'enum': 'BlockdevQcow2EncryptionFormat',
'data': [ 'aes', 'luks' ] }
##
# @BlockdevQcow2Encryption:
#
# Since: 2.10
##
{ 'union': 'BlockdevQcow2Encryption',
'base': { 'format': 'BlockdevQcow2EncryptionFormat' },
'discriminator': 'format',
'data': { 'aes': 'QCryptoBlockOptionsQCow',
'luks': 'QCryptoBlockOptionsLUKS'} }
##
# @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
#
# @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)
#
# @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 0 and it 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)
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsQcow2',
'base': 'BlockdevOptionsGenericCOWFormat',
'data': { '*lazy-refcounts': 'bool',
'*pass-discard-request': 'bool',
'*pass-discard-snapshot': 'bool',
'*pass-discard-other': 'bool',
'*overlap-check': 'Qcow2OverlapChecks',
'*cache-size': 'int',
'*l2-cache-size': 'int',
'*refcount-cache-size': 'int',
'*cache-clean-interval': 'int',
'*encrypt': 'BlockdevQcow2Encryption' } }
##
# @BlockdevOptionsSsh:
#
# @server: host address
#
# @path: path to the image on the host
#
# @user: user as which to connect, defaults to current
# local user name
#
# TODO: Expose the host_key_check option in QMP
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsSsh',
'data': { 'server': 'InetSocketAddress',
'path': 'str',
'*user': 'str' } }
##
# @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)
#
# 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' ] }
##
# @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"
#
# @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',
'*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
#
# 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'] } }
##
# @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' } }
##
# @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' } }
##
# @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' } }
##
# @BlockdevOptionsRbd:
#
# @pool: Ceph pool name.
#
# @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.
#
# @user: Ceph id name.
#
# @server: Monitor host address and port. This maps
# to the "mon_host" Ceph option.
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsRbd',
'data': { 'pool': 'str',
'image': 'str',
'*conf': 'str',
'*snapshot': 'str',
'*user': 'str',
'*server': ['InetSocketAddressBase'] } }
##
# @BlockdevOptionsSheepdog:
#
# Driver specific block device options for sheepdog
#
# @vdi: Virtual disk image name
# @server: The Sheepdog server to connect to
# @snap-id: Snapshot ID
# @tag: Snapshot tag name
#
# Only one of @snap-id and @tag may be present.
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsSheepdog',
'data': { 'server': 'SocketAddress',
'vdi': 'str',
'*snap-id': 'uint32',
'*tag': 'str' } }
##
# @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' ] }
##
# @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' } }
##
# @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
#
# Since: 2.9
##
{ 'struct': 'BlockdevOptionsNbd',
'data': { 'server': 'SocketAddress',
'*export': 'str',
'*tls-creds': 'str' } }
##
# @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' } }
##
# @BlockdevOptionsVxHS:
#
# Driver specific block device options for VxHS
#
# @vdisk-id: UUID of VxHS volume
# @server: vxhs server IP, port
# @tls-creds: TLS credentials ID
#
# Since: 2.10
##
{ 'struct': 'BlockdevOptionsVxHS',
'data': { 'vdisk-id': 'str',
'server': 'InetSocketAddressBase',
'*tls-creds': 'str' } }
##
# @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'
} }
##
# @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.
# @discard: discard-related options (default: ignore)
# @cache: cache-related options
# @read-only: whether the block device should be read-only
# (default: false)
# @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',
'*force-share': 'bool',
'*detect-zeroes': 'BlockdevDetectZeroesOptions' },
'discriminator': 'driver',
'data': {
'blkdebug': 'BlockdevOptionsBlkdebug',
'blkverify': 'BlockdevOptionsBlkverify',
'bochs': 'BlockdevOptionsGenericFormat',
'cloop': 'BlockdevOptionsGenericFormat',
'dmg': 'BlockdevOptionsGenericFormat',
'file': 'BlockdevOptionsFile',
'ftp': 'BlockdevOptionsCurlFtp',
'ftps': 'BlockdevOptionsCurlFtps',
'gluster': 'BlockdevOptionsGluster',
'host_cdrom': 'BlockdevOptionsFile',
'host_device':'BlockdevOptionsFile',
'http': 'BlockdevOptionsCurlHttp',
'https': 'BlockdevOptionsCurlHttps',
'iscsi': 'BlockdevOptionsIscsi',
'luks': 'BlockdevOptionsLUKS',
'nbd': 'BlockdevOptionsNbd',
'nfs': 'BlockdevOptionsNfs',
'null-aio': 'BlockdevOptionsNull',
'null-co': 'BlockdevOptionsNull',
'parallels': 'BlockdevOptionsGenericFormat',
'qcow2': 'BlockdevOptionsQcow2',
'qcow': 'BlockdevOptionsQcow',
'qed': 'BlockdevOptionsGenericCOWFormat',
'quorum': 'BlockdevOptionsQuorum',
'raw': 'BlockdevOptionsRaw',
'rbd': 'BlockdevOptionsRbd',
'replication':'BlockdevOptionsReplication',
'sheepdog': 'BlockdevOptionsSheepdog',
'ssh': 'BlockdevOptionsSsh',
'throttle': 'BlockdevOptionsThrottle',
'vdi': 'BlockdevOptionsGenericFormat',
'vhdx': 'BlockdevOptionsGenericFormat',
'vmdk': 'BlockdevOptionsGenericCOWFormat',
'vpc': 'BlockdevOptionsGenericFormat',
'vvfat': 'BlockdevOptionsVVFAT',
'vxhs': 'BlockdevOptionsVxHS'
} }
##
# @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. If the @id option is given at the top level, a
# BlockBackend will be created; otherwise, @node-name is mandatory at the top
# level and no BlockBackend will be created.
#
# Since: 2.9
#
# Example:
#
# 1.
# -> { "execute": "blockdev-add",
# "arguments": {
# "driver": "qcow2",
# "node-name": "test1",
# "file": {
# "driver": "file",
# "filename": "test.qcow2"
# }
# }
# }
# <- { "return": {} }
#
# 2.
# -> { "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 }
##
# @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' } }
##
# @blockdev-open-tray:
#
# Opens a block device's tray. If there is a block driver state tree inserted as
# a medium, it will become inaccessible to the guest (but it will remain
# associated to the block device, so closing the tray will make it accessible
# again).
#
# If the tray was already open before, this will be a no-op.
#
# Once the tray opens, a DEVICE_TRAY_MOVED event is emitted. There are cases in
# which no such event will be generated, these include:
# - if the guest has locked the tray, @force is false and the guest does not
# respond to the eject request
# - if the BlockBackend denoted by @device does not have a guest device attached
# to it
# - if the guest device does not have an actual tray
#
# @device: Block device name (deprecated, use @id instead)
#
# @id: The name or QOM path of the guest device (since: 2.8)
#
# @force: if false (the default), an eject request will be sent to
# the guest if it has locked the tray (and the tray will not be opened
# immediately); if true, the tray will be opened regardless of whether
# it is locked
#
# Since: 2.5
#
# Example:
#
# -> { "execute": "blockdev-open-tray",
# "arguments": { "id": "ide0-1-0" } }
#
# <- { "timestamp": { "seconds": 1418751016,
# "microseconds": 716996 },
# "event": "DEVICE_TRAY_MOVED",
# "data": { "device": "ide1-cd0",
# "id": "ide0-1-0",
# "tray-open": true } }
#
# <- { "return": {} }
#
##
{ 'command': 'blockdev-open-tray',
'data': { '*device': 'str',
'*id': 'str',
'*force': 'bool' } }
##
# @blockdev-close-tray:
#
# Closes a block device's tray. If there is a block driver state tree associated
# with the block device (which is currently ejected), that tree will be loaded
# as the medium.
#
# If the tray was already closed before, this will be a no-op.
#
# @device: Block device name (deprecated, use @id instead)
#
# @id: The name or QOM path of the guest device (since: 2.8)
#
# Since: 2.5
#
# Example:
#
# -> { "execute": "blockdev-close-tray",
# "arguments": { "id": "ide0-1-0" } }
#
# <- { "timestamp": { "seconds": 1418751345,
# "microseconds": 272147 },
# "event": "DEVICE_TRAY_MOVED",
# "data": { "device": "ide1-cd0",
# "id": "ide0-1-0",
# "tray-open": false } }
#
# <- { "return": {} }
#
##
{ 'command': 'blockdev-close-tray',
'data': { '*device': 'str',
'*id': 'str' } }
##
# @x-blockdev-remove-medium:
#
# Removes a medium (a block driver state tree) from a block device. That block
# device's tray must currently be open (unless there is no attached guest
# device).
#
# If the tray is open and there is no medium inserted, this will be a no-op.
#
# @device: Block device name (deprecated, use @id instead)
#
# @id: The name or QOM path of the guest device (since: 2.8)
#
# Note: This command is still a work in progress and is considered experimental.
# Stay away from it unless you want to help with its development.
#
# Since: 2.5
#
# Example:
#
# -> { "execute": "x-blockdev-remove-medium",
# "arguments": { "id": "ide0-1-0" } }
#
# <- { "error": { "class": "GenericError",
# "desc": "Tray of device 'ide0-1-0' is not open" } }
#
# -> { "execute": "blockdev-open-tray",
# "arguments": { "id": "ide0-1-0" } }
#
# <- { "timestamp": { "seconds": 1418751627,
# "microseconds": 549958 },
# "event": "DEVICE_TRAY_MOVED",
# "data": { "device": "ide1-cd0",
# "id": "ide0-1-0",
# "tray-open": true } }
#
# <- { "return": {} }
#
# -> { "execute": "x-blockdev-remove-medium",
# "arguments": { "id": "ide0-1-0" } }
#
# <- { "return": {} }
#
##
{ 'command': 'x-blockdev-remove-medium',
'data': { '*device': 'str',
'*id': 'str' } }
##
# @x-blockdev-insert-medium:
#
# Inserts a medium (a block driver state tree) into a block device. That block
# device's tray must currently be open (unless there is no attached guest
# device) and there must be no medium inserted already.
#
# @device: Block device name (deprecated, use @id instead)
#
# @id: The name or QOM path of the guest device (since: 2.8)
#
# @node-name: name of a node in the block driver state graph
#
# Note: This command is still a work in progress and is considered experimental.
# Stay away from it unless you want to help with its development.
#
# Since: 2.5
#
# Example:
#
# -> { "execute": "blockdev-add",
# "arguments": {
# "node-name": "node0",
# "driver": "raw",
# "file": { "driver": "file",
# "filename": "fedora.iso" } } }
# <- { "return": {} }
#
# -> { "execute": "x-blockdev-insert-medium",
# "arguments": { "id": "ide0-1-0",
# "node-name": "node0" } }
#
# <- { "return": {} }
#
##
{ 'command': 'x-blockdev-insert-medium',
'data': { '*device': 'str',
'*id': 'str',
'node-name': 'str'} }
##
# @BlockdevChangeReadOnlyMode:
#
# Specifies the new read-only mode of a block device subject to the
# @blockdev-change-medium command.
#
# @retain: Retains the current read-only mode
#
# @read-only: Makes the device read-only
#
# @read-write: Makes the device writable
#
# Since: 2.3
#
##
{ 'enum': 'BlockdevChangeReadOnlyMode',
'data': ['retain', 'read-only', 'read-write'] }
##
# @blockdev-change-medium:
#
# Changes the medium inserted into a block device by ejecting the current medium
# and loading a new image file which is inserted as the new medium (this command
# combines blockdev-open-tray, x-blockdev-remove-medium,
# x-blockdev-insert-medium and blockdev-close-tray).
#
# @device: Block device name (deprecated, use @id instead)
#
# @id: The name or QOM path of the guest device
# (since: 2.8)
#
# @filename: filename of the new image to be loaded
#
# @format: format to open the new image with (defaults to
# the probed format)
#
# @read-only-mode: change the read-only mode of the device; defaults
# to 'retain'
#
# Since: 2.5
#
# Examples:
#
# 1. Change a removable medium
#
# -> { "execute": "blockdev-change-medium",
# "arguments": { "id": "ide0-1-0",
# "filename": "/srv/images/Fedora-12-x86_64-DVD.iso",
# "format": "raw" } }
# <- { "return": {} }
#
# 2. Load a read-only medium into a writable drive
#
# -> { "execute": "blockdev-change-medium",
# "arguments": { "id": "floppyA",
# "filename": "/srv/images/ro.img",
# "format": "raw",
# "read-only-mode": "retain" } }
#
# <- { "error":
# { "class": "GenericError",
# "desc": "Could not open '/srv/images/ro.img': Permission denied" } }
#
# -> { "execute": "blockdev-change-medium",
# "arguments": { "id": "floppyA",
# "filename": "/srv/images/ro.img",
# "format": "raw",
# "read-only-mode": "read-only" } }
#
# <- { "return": {} }
#
##
{ 'command': 'blockdev-change-medium',
'data': { '*device': 'str',
'*id': 'str',
'filename': 'str',
'*format': 'str',
'*read-only-mode': 'BlockdevChangeReadOnlyMode' } }
##
# @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": "ide0-hd0", "node-name": "node0",
# "msg": "Prevented active L1 table overwrite", "offset": 196608,
# "size": 65536 },
# "timestamp": { "seconds": 1378126126, "microseconds": 966463 } }
#
# 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. (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: 0.13.0
#
# Example:
#
# <- { "event": "BLOCK_IO_ERROR",
# "data": { "device": "ide0-hd1",
# "node-name": "#block212",
# "operation": "write",
# "action": "stop" },
# "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' : 'BlockJobType',
'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' : 'BlockJobType',
'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' : 'BlockJobType',
'device': 'str',
'len' : 'int',
'offset': 'int',
'speed' : 'int' } }
##
# @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 zeros.
# @full: preallocate all data by writing zeros to device to ensure disk
# space is really available. @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' } }
##
# @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.
#
# Note: 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.
#
# Warning: The data in a new quorum child MUST be consistent with that of
# the rest of the array.
#
# Since: 2.7
#
# Example:
#
# 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' } }
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