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