4 # == QAPI block core definitions (vm unrelated)
7 # QAPI common definitions
8 { 'include': 'common.json' }
13 # @id: unique snapshot id
15 # @name: user chosen name
17 # @vm-state-size: size of the VM state
19 # @date-sec: UTC date of the snapshot in seconds
21 # @date-nsec: fractional part in nano seconds to be used with date-sec
23 # @vm-clock-sec: VM clock relative to boot in seconds
25 # @vm-clock-nsec: fractional part in nano seconds to be used with vm-clock-sec
30 { 'struct': 'SnapshotInfo',
31 'data': { 'id': 'str', 'name': 'str', 'vm-state-size': 'int',
32 'date-sec': 'int', 'date-nsec': 'int',
33 'vm-clock-sec': 'int', 'vm-clock-nsec': 'int' } }
36 # @ImageInfoSpecificQCow2:
38 # @compat: compatibility level
40 # @lazy-refcounts: #optional on or off; only valid for compat >= 1.1
42 # @corrupt: #optional true if the image has been marked corrupt; only valid for
43 # compat >= 1.1 (since 2.2)
45 # @refcount-bits: width of a refcount entry in bits (since 2.3)
49 { 'struct': 'ImageInfoSpecificQCow2',
52 '*lazy-refcounts': 'bool',
54 'refcount-bits': 'int'
58 # @ImageInfoSpecificVmdk:
60 # @create-type: The create type of VMDK image
62 # @cid: Content id of image
64 # @parent-cid: Parent VMDK image's cid
66 # @extents: List of extent files
70 { 'struct': 'ImageInfoSpecificVmdk',
75 'extents': ['ImageInfo']
81 # A discriminated record of image format specific information structures.
85 { 'union': 'ImageInfoSpecific',
87 'qcow2': 'ImageInfoSpecificQCow2',
88 'vmdk': 'ImageInfoSpecificVmdk',
89 # If we need to add block driver specific parameters for
90 # LUKS in future, then we'll subclass QCryptoBlockInfoLUKS
91 # to define a ImageInfoSpecificLUKS
92 'luks': 'QCryptoBlockInfoLUKS'
98 # Information about a QEMU image file
100 # @filename: name of the image file
102 # @format: format of the image file
104 # @virtual-size: maximum capacity in bytes of the image
106 # @actual-size: #optional actual size on disk in bytes of the image
108 # @dirty-flag: #optional true if image is not cleanly closed
110 # @cluster-size: #optional size of a cluster in bytes
112 # @encrypted: #optional true if the image is encrypted
114 # @compressed: #optional true if the image is compressed (Since 1.7)
116 # @backing-filename: #optional name of the backing file
118 # @full-backing-filename: #optional full path of the backing file
120 # @backing-filename-format: #optional the format of the backing file
122 # @snapshots: #optional list of VM snapshots
124 # @backing-image: #optional info of the backing image (since 1.6)
126 # @format-specific: #optional structure supplying additional format-specific
127 # information (since 1.7)
132 { 'struct': 'ImageInfo',
133 'data': {'filename': 'str', 'format': 'str', '*dirty-flag': 'bool',
134 '*actual-size': 'int', 'virtual-size': 'int',
135 '*cluster-size': 'int', '*encrypted': 'bool', '*compressed': 'bool',
136 '*backing-filename': 'str', '*full-backing-filename': 'str',
137 '*backing-filename-format': 'str', '*snapshots': ['SnapshotInfo'],
138 '*backing-image': 'ImageInfo',
139 '*format-specific': 'ImageInfoSpecific' } }
144 # Information about a QEMU image file check
146 # @filename: name of the image file checked
148 # @format: format of the image file checked
150 # @check-errors: number of unexpected errors occurred during check
152 # @image-end-offset: #optional offset (in bytes) where the image ends, this
153 # field is present if the driver for the image format
156 # @corruptions: #optional number of corruptions found during the check if any
158 # @leaks: #optional number of leaks found during the check if any
160 # @corruptions-fixed: #optional number of corruptions fixed during the check
163 # @leaks-fixed: #optional number of leaks fixed during the check if any
165 # @total-clusters: #optional total number of clusters, this field is present
166 # if the driver for the image format supports it
168 # @allocated-clusters: #optional total number of allocated clusters, this
169 # field is present if the driver for the image format
172 # @fragmented-clusters: #optional total number of fragmented clusters, this
173 # field is present if the driver for the image format
176 # @compressed-clusters: #optional total number of compressed clusters, this
177 # field is present if the driver for the image format
183 { 'struct': 'ImageCheck',
184 'data': {'filename': 'str', 'format': 'str', 'check-errors': 'int',
185 '*image-end-offset': 'int', '*corruptions': 'int', '*leaks': 'int',
186 '*corruptions-fixed': 'int', '*leaks-fixed': 'int',
187 '*total-clusters': 'int', '*allocated-clusters': 'int',
188 '*fragmented-clusters': 'int', '*compressed-clusters': 'int' } }
193 # Mapping information from a virtual block range to a host file range
195 # @start: the start byte of the mapped virtual range
197 # @length: the number of bytes of the mapped virtual range
199 # @data: whether the mapped range has data
201 # @zero: whether the virtual blocks are zeroed
203 # @depth: the depth of the mapping
205 # @offset: #optional the offset in file that the virtual sectors are mapped to
207 # @filename: #optional filename that is referred to by @offset
212 { 'struct': 'MapEntry',
213 'data': {'start': 'int', 'length': 'int', 'data': 'bool',
214 'zero': 'bool', 'depth': 'int', '*offset': 'int',
215 '*filename': 'str' } }
218 # @BlockdevCacheInfo:
220 # Cache mode information for a block device
222 # @writeback: true if writeback mode is enabled
223 # @direct: true if the host page cache is bypassed (O_DIRECT)
224 # @no-flush: true if flush requests are ignored for the device
228 { 'struct': 'BlockdevCacheInfo',
229 'data': { 'writeback': 'bool',
231 'no-flush': 'bool' } }
236 # Information about the backing device for a block device.
238 # @file: the filename of the backing device
240 # @node-name: #optional the name of the block driver node (Since 2.0)
242 # @ro: true if the backing device was open read-only
244 # @drv: the name of the block format used to open the backing device. As of
245 # 0.14.0 this can be: 'blkdebug', 'bochs', 'cloop', 'cow', 'dmg',
246 # 'file', 'file', 'ftp', 'ftps', 'host_cdrom', 'host_device',
247 # 'http', 'https', 'luks', 'nbd', 'parallels', 'qcow',
248 # 'qcow2', 'raw', 'vdi', 'vmdk', 'vpc', 'vvfat'
249 # 2.2: 'archipelago' added, 'cow' dropped
250 # 2.3: 'host_floppy' deprecated
251 # 2.5: 'host_floppy' dropped
253 # 2.8: 'replication' added, 'tftp' dropped
255 # @backing_file: #optional the name of the backing file (for copy-on-write)
257 # @backing_file_depth: number of files in the backing file chain (since: 1.2)
259 # @encrypted: true if the backing device is encrypted
261 # @encryption_key_missing: true if the backing device is encrypted but an
262 # valid encryption key is missing
264 # @detect_zeroes: detect and optimize zero writes (Since 2.1)
266 # @bps: total throughput limit in bytes per second is specified
268 # @bps_rd: read throughput limit in bytes per second is specified
270 # @bps_wr: write throughput limit in bytes per second is specified
272 # @iops: total I/O operations per second is specified
274 # @iops_rd: read I/O operations per second is specified
276 # @iops_wr: write I/O operations per second is specified
278 # @image: the info of image used (since: 1.6)
280 # @bps_max: #optional total throughput limit during bursts,
281 # in bytes (Since 1.7)
283 # @bps_rd_max: #optional read throughput limit during bursts,
284 # in bytes (Since 1.7)
286 # @bps_wr_max: #optional write throughput limit during bursts,
287 # in bytes (Since 1.7)
289 # @iops_max: #optional total I/O operations per second during bursts,
290 # in bytes (Since 1.7)
292 # @iops_rd_max: #optional read I/O operations per second during bursts,
293 # in bytes (Since 1.7)
295 # @iops_wr_max: #optional write I/O operations per second during bursts,
296 # in bytes (Since 1.7)
298 # @bps_max_length: #optional maximum length of the @bps_max burst
299 # period, in seconds. (Since 2.6)
301 # @bps_rd_max_length: #optional maximum length of the @bps_rd_max
302 # burst period, in seconds. (Since 2.6)
304 # @bps_wr_max_length: #optional maximum length of the @bps_wr_max
305 # burst period, in seconds. (Since 2.6)
307 # @iops_max_length: #optional maximum length of the @iops burst
308 # period, in seconds. (Since 2.6)
310 # @iops_rd_max_length: #optional maximum length of the @iops_rd_max
311 # burst period, in seconds. (Since 2.6)
313 # @iops_wr_max_length: #optional maximum length of the @iops_wr_max
314 # burst period, in seconds. (Since 2.6)
316 # @iops_size: #optional an I/O size in bytes (Since 1.7)
318 # @group: #optional throttle group name (Since 2.4)
320 # @cache: the cache mode used for the block device (since: 2.3)
322 # @write_threshold: configured write threshold for the device.
323 # 0 if disabled. (Since 2.3)
328 { 'struct': 'BlockDeviceInfo',
329 'data': { 'file': 'str', '*node-name': 'str', 'ro': 'bool', 'drv': 'str',
330 '*backing_file': 'str', 'backing_file_depth': 'int',
331 'encrypted': 'bool', 'encryption_key_missing': 'bool',
332 'detect_zeroes': 'BlockdevDetectZeroesOptions',
333 'bps': 'int', 'bps_rd': 'int', 'bps_wr': 'int',
334 'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int',
335 'image': 'ImageInfo',
336 '*bps_max': 'int', '*bps_rd_max': 'int',
337 '*bps_wr_max': 'int', '*iops_max': 'int',
338 '*iops_rd_max': 'int', '*iops_wr_max': 'int',
339 '*bps_max_length': 'int', '*bps_rd_max_length': 'int',
340 '*bps_wr_max_length': 'int', '*iops_max_length': 'int',
341 '*iops_rd_max_length': 'int', '*iops_wr_max_length': 'int',
342 '*iops_size': 'int', '*group': 'str', 'cache': 'BlockdevCacheInfo',
343 'write_threshold': 'int' } }
346 # @BlockDeviceIoStatus:
348 # An enumeration of block device I/O status.
350 # @ok: The last I/O operation has succeeded
352 # @failed: The last I/O operation has failed
354 # @nospace: The last I/O operation has failed due to a no-space condition
358 { 'enum': 'BlockDeviceIoStatus', 'data': [ 'ok', 'failed', 'nospace' ] }
361 # @BlockDeviceMapEntry:
363 # Entry in the metadata map of the device (returned by "qemu-img map")
365 # @start: Offset in the image of the first byte described by this entry
368 # @length: Length of the range described by this entry (in bytes)
370 # @depth: Number of layers (0 = top image, 1 = top image's backing file, etc.)
371 # before reaching one for which the range is allocated. The value is
372 # in the range 0 to the depth of the image chain - 1.
374 # @zero: the sectors in this range read as zeros
376 # @data: reading the image will actually read data from a file (in particular,
377 # if @offset is present this means that the sectors are not simply
378 # preallocated, but contain actual data in raw format)
380 # @offset: if present, the image file stores the data for this range in
381 # raw format at the given offset.
385 { 'struct': 'BlockDeviceMapEntry',
386 'data': { 'start': 'int', 'length': 'int', 'depth': 'int', 'zero': 'bool',
387 'data': 'bool', '*offset': 'int' } }
390 # @DirtyBitmapStatus:
392 # An enumeration of possible states that a dirty bitmap can report to the user.
394 # @frozen: The bitmap is currently in-use by a backup operation or block job,
397 # @disabled: The bitmap is currently in-use by an internal operation and is
398 # read-only. It can still be deleted.
400 # @active: The bitmap is actively monitoring for new writes, and can be cleared,
401 # deleted, or used for backup operations.
405 { 'enum': 'DirtyBitmapStatus',
406 'data': ['active', 'disabled', 'frozen'] }
411 # Block dirty bitmap information.
413 # @name: #optional the name of the dirty bitmap (Since 2.4)
415 # @count: number of dirty bytes according to the dirty bitmap
417 # @granularity: granularity of the dirty bitmap in bytes (since 1.4)
419 # @status: current status of the dirty bitmap (since 2.4)
423 { 'struct': 'BlockDirtyInfo',
424 'data': {'*name': 'str', 'count': 'int', 'granularity': 'uint32',
425 'status': 'DirtyBitmapStatus'} }
430 # Block device information. This structure describes a virtual device and
431 # the backing device associated with it.
433 # @device: The device name associated with the virtual device.
435 # @type: This field is returned only for compatibility reasons, it should
436 # not be used (always returns 'unknown')
438 # @removable: True if the device supports removable media.
440 # @locked: True if the guest has locked this device from having its media
443 # @tray_open: #optional True if the device's tray is open
444 # (only present if it has a tray)
446 # @dirty-bitmaps: #optional dirty bitmaps information (only present if the
447 # driver has one or more dirty bitmaps) (Since 2.0)
449 # @io-status: #optional @BlockDeviceIoStatus. Only present if the device
450 # supports it and the VM is configured to stop on errors
451 # (supported device models: virtio-blk, ide, scsi-disk)
453 # @inserted: #optional @BlockDeviceInfo describing the device if media is
458 { 'struct': 'BlockInfo',
459 'data': {'device': 'str', 'type': 'str', 'removable': 'bool',
460 'locked': 'bool', '*inserted': 'BlockDeviceInfo',
461 '*tray_open': 'bool', '*io-status': 'BlockDeviceIoStatus',
462 '*dirty-bitmaps': ['BlockDirtyInfo'] } }
467 # Get a list of BlockInfo for all virtual block devices.
469 # Returns: a list of @BlockInfo describing each virtual block device
475 # -> { "execute": "query-block" }
480 # "device":"ide0-hd0",
487 # "file":"disks/test.qcow2",
488 # "backing_file_depth":1,
495 # "bps_max": 8000000,
502 # "detect_zeroes": "on",
503 # "write_threshold": 0,
505 # "filename":"disks/test.qcow2",
507 # "virtual-size":2048000,
508 # "backing_file":"base.qcow2",
509 # "full-backing-filename":"disks/base.qcow2",
510 # "backing-filename-format":"qcow2",
514 # "name": "snapshot1",
515 # "vm-state-size": 0,
516 # "date-sec": 10000200,
518 # "vm-clock-sec": 206,
519 # "vm-clock-nsec": 30
523 # "filename":"disks/base.qcow2",
525 # "virtual-size":2048000
533 # "device":"ide1-cd0",
539 # "device":"floppy0",
554 { 'command': 'query-block', 'returns': ['BlockInfo'] }
558 # @BlockDeviceTimedStats:
560 # Statistics of a block device during a given interval of time.
562 # @interval_length: Interval used for calculating the statistics,
565 # @min_rd_latency_ns: Minimum latency of read operations in the
566 # defined interval, in nanoseconds.
568 # @min_wr_latency_ns: Minimum latency of write operations in the
569 # defined interval, in nanoseconds.
571 # @min_flush_latency_ns: Minimum latency of flush operations in the
572 # defined interval, in nanoseconds.
574 # @max_rd_latency_ns: Maximum latency of read operations in the
575 # defined interval, in nanoseconds.
577 # @max_wr_latency_ns: Maximum latency of write operations in the
578 # defined interval, in nanoseconds.
580 # @max_flush_latency_ns: Maximum latency of flush operations in the
581 # defined interval, in nanoseconds.
583 # @avg_rd_latency_ns: Average latency of read operations in the
584 # defined interval, in nanoseconds.
586 # @avg_wr_latency_ns: Average latency of write operations in the
587 # defined interval, in nanoseconds.
589 # @avg_flush_latency_ns: Average latency of flush operations in the
590 # defined interval, in nanoseconds.
592 # @avg_rd_queue_depth: Average number of pending read operations
593 # in the defined interval.
595 # @avg_wr_queue_depth: Average number of pending write operations
596 # in the defined interval.
600 { 'struct': 'BlockDeviceTimedStats',
601 'data': { 'interval_length': 'int', 'min_rd_latency_ns': 'int',
602 'max_rd_latency_ns': 'int', 'avg_rd_latency_ns': 'int',
603 'min_wr_latency_ns': 'int', 'max_wr_latency_ns': 'int',
604 'avg_wr_latency_ns': 'int', 'min_flush_latency_ns': 'int',
605 'max_flush_latency_ns': 'int', 'avg_flush_latency_ns': 'int',
606 'avg_rd_queue_depth': 'number', 'avg_wr_queue_depth': 'number' } }
611 # Statistics of a virtual block device or a block backing device.
613 # @rd_bytes: The number of bytes read by the device.
615 # @wr_bytes: The number of bytes written by the device.
617 # @rd_operations: The number of read operations performed by the device.
619 # @wr_operations: The number of write operations performed by the device.
621 # @flush_operations: The number of cache flush operations performed by the
622 # device (since 0.15.0)
624 # @flush_total_time_ns: Total time spend on cache flushes in nano-seconds
627 # @wr_total_time_ns: Total time spend on writes in nano-seconds (since 0.15.0).
629 # @rd_total_time_ns: Total_time_spend on reads in nano-seconds (since 0.15.0).
631 # @wr_highest_offset: The offset after the greatest byte written to the
632 # device. The intended use of this information is for
633 # growable sparse files (like qcow2) that are used on top
634 # of a physical device.
636 # @rd_merged: Number of read requests that have been merged into another
637 # request (Since 2.3).
639 # @wr_merged: Number of write requests that have been merged into another
640 # request (Since 2.3).
642 # @idle_time_ns: #optional Time since the last I/O operation, in
643 # nanoseconds. If the field is absent it means that
644 # there haven't been any operations yet (Since 2.5).
646 # @failed_rd_operations: The number of failed read operations
647 # performed by the device (Since 2.5)
649 # @failed_wr_operations: The number of failed write operations
650 # performed by the device (Since 2.5)
652 # @failed_flush_operations: The number of failed flush operations
653 # performed by the device (Since 2.5)
655 # @invalid_rd_operations: The number of invalid read operations
656 # performed by the device (Since 2.5)
658 # @invalid_wr_operations: The number of invalid write operations
659 # performed by the device (Since 2.5)
661 # @invalid_flush_operations: The number of invalid flush operations
662 # performed by the device (Since 2.5)
664 # @account_invalid: Whether invalid operations are included in the
665 # last access statistics (Since 2.5)
667 # @account_failed: Whether failed operations are included in the
668 # latency and last access statistics (Since 2.5)
670 # @timed_stats: Statistics specific to the set of previously defined
671 # intervals of time (Since 2.5)
675 { 'struct': 'BlockDeviceStats',
676 'data': {'rd_bytes': 'int', 'wr_bytes': 'int', 'rd_operations': 'int',
677 'wr_operations': 'int', 'flush_operations': 'int',
678 'flush_total_time_ns': 'int', 'wr_total_time_ns': 'int',
679 'rd_total_time_ns': 'int', 'wr_highest_offset': 'int',
680 'rd_merged': 'int', 'wr_merged': 'int', '*idle_time_ns': 'int',
681 'failed_rd_operations': 'int', 'failed_wr_operations': 'int',
682 'failed_flush_operations': 'int', 'invalid_rd_operations': 'int',
683 'invalid_wr_operations': 'int', 'invalid_flush_operations': 'int',
684 'account_invalid': 'bool', 'account_failed': 'bool',
685 'timed_stats': ['BlockDeviceTimedStats'] } }
690 # Statistics of a virtual block device or a block backing device.
692 # @device: #optional If the stats are for a virtual block device, the name
693 # corresponding to the virtual block device.
695 # @node-name: #optional The node name of the device. (Since 2.3)
697 # @stats: A @BlockDeviceStats for the device.
699 # @parent: #optional This describes the file block device if it has one.
700 # Contains recursively the statistics of the underlying
701 # protocol (e.g. the host file for a qcow2 image). If there is
702 # no underlying protocol, this field is omitted
704 # @backing: #optional This describes the backing block device if it has one.
709 { 'struct': 'BlockStats',
710 'data': {'*device': 'str', '*node-name': 'str',
711 'stats': 'BlockDeviceStats',
712 '*parent': 'BlockStats',
713 '*backing': 'BlockStats'} }
718 # Query the @BlockStats for all virtual block devices.
720 # @query-nodes: #optional If true, the command will query all the block nodes
721 # that have a node name, in a list which will include "parent"
722 # information, but not "backing".
723 # If false or omitted, the behavior is as before - query all the
724 # device backends, recursively including their "parent" and
725 # "backing". (Since 2.3)
727 # Returns: A list of @BlockStats for each virtual block devices.
733 # -> { "execute": "query-blockstats" }
737 # "device":"ide0-hd0",
740 # "wr_highest_offset":3686448128,
741 # "wr_bytes":9786368,
742 # "wr_operations":751,
743 # "rd_bytes":122567168,
744 # "rd_operations":36772
745 # "wr_total_times_ns":313253456
746 # "rd_total_times_ns":3465673657
747 # "flush_total_times_ns":49653
748 # "flush_operations":61,
751 # "idle_time_ns":2953431879,
752 # "account_invalid":true,
753 # "account_failed":false
757 # "wr_highest_offset":2821110784,
758 # "wr_bytes":9786368,
759 # "wr_operations":692,
760 # "rd_bytes":122739200,
761 # "rd_operations":36604
762 # "flush_operations":51,
763 # "wr_total_times_ns":313253456
764 # "rd_total_times_ns":3465673657
765 # "flush_total_times_ns":49653,
768 # "idle_time_ns":2953431879,
769 # "account_invalid":true,
770 # "account_failed":false
774 # "device":"ide1-cd0",
776 # "wr_highest_offset":0,
781 # "flush_operations":0,
782 # "wr_total_times_ns":0
783 # "rd_total_times_ns":0
784 # "flush_total_times_ns":0,
787 # "account_invalid":false,
788 # "account_failed":false
792 # "device":"floppy0",
794 # "wr_highest_offset":0,
799 # "flush_operations":0,
800 # "wr_total_times_ns":0
801 # "rd_total_times_ns":0
802 # "flush_total_times_ns":0,
805 # "account_invalid":false,
806 # "account_failed":false
812 # "wr_highest_offset":0,
817 # "flush_operations":0,
818 # "wr_total_times_ns":0
819 # "rd_total_times_ns":0
820 # "flush_total_times_ns":0,
823 # "account_invalid":false,
824 # "account_failed":false
831 { 'command': 'query-blockstats',
832 'data': { '*query-nodes': 'bool' },
833 'returns': ['BlockStats'] }
838 # An enumeration of possible behaviors for errors on I/O operations.
839 # The exact meaning depends on whether the I/O was initiated by a guest
842 # @report: for guest operations, report the error to the guest;
843 # for jobs, cancel the job
845 # @ignore: ignore the error, only report a QMP event (BLOCK_IO_ERROR
846 # or BLOCK_JOB_ERROR)
848 # @enospc: same as @stop on ENOSPC, same as @report otherwise.
850 # @stop: for guest operations, stop the virtual machine;
851 # for jobs, pause the job
853 # @auto: inherit the error handling policy of the backend (since: 2.7)
857 { 'enum': 'BlockdevOnError',
858 'data': ['report', 'ignore', 'enospc', 'stop', 'auto'] }
863 # An enumeration of possible behaviors for the initial synchronization
864 # phase of storage mirroring.
866 # @top: copies data in the topmost image to the destination
868 # @full: copies data from all images to the destination
870 # @none: only copy data written from now on
872 # @incremental: only copy data described by the dirty bitmap. Since: 2.4
876 { 'enum': 'MirrorSyncMode',
877 'data': ['top', 'full', 'none', 'incremental'] }
882 # Type of a block job.
884 # @commit: block commit job type, see "block-commit"
886 # @stream: block stream job type, see "block-stream"
888 # @mirror: drive mirror job type, see "drive-mirror"
890 # @backup: drive backup job type, see "drive-backup"
894 { 'enum': 'BlockJobType',
895 'data': ['commit', 'stream', 'mirror', 'backup'] }
900 # Information about a long-running block device operation.
902 # @type: the job type ('stream' for image streaming)
904 # @device: The job identifier. Originally the device name but other
905 # values are allowed since QEMU 2.7
907 # @len: the maximum progress value
909 # @busy: false if the job is known to be in a quiescent state, with
910 # no pending I/O. Since 1.3.
912 # @paused: whether the job is paused or, if @busy is true, will
913 # pause itself as soon as possible. Since 1.3.
915 # @offset: the current progress value
917 # @speed: the rate limit, bytes per second
919 # @io-status: the status of the job (since 1.3)
921 # @ready: true if the job may be completed (since 2.2)
925 { 'struct': 'BlockJobInfo',
926 'data': {'type': 'str', 'device': 'str', 'len': 'int',
927 'offset': 'int', 'busy': 'bool', 'paused': 'bool', 'speed': 'int',
928 'io-status': 'BlockDeviceIoStatus', 'ready': 'bool'} }
933 # Return information about long-running block device operations.
935 # Returns: a list of @BlockJobInfo for each active block job
939 { 'command': 'query-block-jobs', 'returns': ['BlockJobInfo'] }
944 # This command sets the password of a block device that has not been open
945 # with a password and requires one.
947 # The two cases where this can happen are a block device is created through
948 # QEMU's initial command line or a block device is changed through the legacy
951 # In the event that the block device is created through the initial command
952 # line, the VM will start in the stopped state regardless of whether '-S' is
953 # used. The intention is for a management tool to query the block devices to
954 # determine which ones are encrypted, set the passwords with this command, and
955 # then start the guest with the @cont command.
957 # Either @device or @node-name must be set but not both.
959 # @device: #optional the name of the block backend device to set the password on
961 # @node-name: #optional graph node name to set the password on (Since 2.0)
963 # @password: the password to use for the device
965 # Returns: nothing on success
966 # If @device is not a valid block device, DeviceNotFound
967 # If @device is not encrypted, DeviceNotEncrypted
969 # Notes: Not all block formats support encryption and some that do are not
970 # able to validate that a password is correct. Disk corruption may
971 # occur if an invalid password is specified.
977 # -> { "execute": "block_passwd", "arguments": { "device": "ide0-hd0",
978 # "password": "12345" } }
979 # <- { "return": {} }
982 { 'command': 'block_passwd', 'data': {'*device': 'str',
983 '*node-name': 'str', 'password': 'str'} }
988 # Resize a block image while a guest is running.
990 # Either @device or @node-name must be set but not both.
992 # @device: #optional the name of the device to get the image resized
994 # @node-name: #optional graph node name to get the image resized (Since 2.0)
996 # @size: new image size in bytes
998 # Returns: nothing on success
999 # If @device is not a valid block device, DeviceNotFound
1005 # -> { "execute": "block_resize",
1006 # "arguments": { "device": "scratch", "size": 1073741824 } }
1007 # <- { "return": {} }
1010 { 'command': 'block_resize', 'data': { '*device': 'str',
1011 '*node-name': 'str',
1017 # An enumeration that tells QEMU how to set the backing file path in
1020 # @existing: QEMU should look for an existing image file.
1022 # @absolute-paths: QEMU should create a new image with absolute paths
1023 # for the backing file. If there is no backing file available, the new
1024 # image will not be backed either.
1028 { 'enum': 'NewImageMode',
1029 'data': [ 'existing', 'absolute-paths' ] }
1032 # @BlockdevSnapshotSync:
1034 # Either @device or @node-name must be set but not both.
1036 # @device: #optional the name of the device to generate the snapshot from.
1038 # @node-name: #optional graph node name to generate the snapshot from (Since 2.0)
1040 # @snapshot-file: the target of the new image. If the file exists, or
1041 # if it is a device, the snapshot will be created in the existing
1042 # file/device. Otherwise, a new file will be created.
1044 # @snapshot-node-name: #optional the graph node name of the new image (Since 2.0)
1046 # @format: #optional the format of the snapshot image, default is 'qcow2'.
1048 # @mode: #optional whether and how QEMU should create a new image, default is
1051 { 'struct': 'BlockdevSnapshotSync',
1052 'data': { '*device': 'str', '*node-name': 'str',
1053 'snapshot-file': 'str', '*snapshot-node-name': 'str',
1054 '*format': 'str', '*mode': 'NewImageMode' } }
1057 # @BlockdevSnapshot:
1059 # @node: device or node name that will have a snapshot created.
1061 # @overlay: reference to the existing block device that will become
1062 # the overlay of @node, as part of creating the snapshot.
1063 # It must not have a current backing file (this can be
1064 # achieved by passing "backing": "" to blockdev-add).
1068 { 'struct': 'BlockdevSnapshot',
1069 'data': { 'node': 'str', 'overlay': 'str' } }
1074 # @job-id: #optional identifier for the newly-created block job. If
1075 # omitted, the device name will be used. (Since 2.7)
1077 # @device: the device name or node-name of a root node which should be copied.
1079 # @target: the target of the new image. If the file exists, or if it
1080 # is a device, the existing file/device will be used as the new
1081 # destination. If it does not exist, a new file will be created.
1083 # @format: #optional the format of the new destination, default is to
1084 # probe if @mode is 'existing', else the format of the source
1086 # @sync: what parts of the disk image should be copied to the destination
1087 # (all the disk, only the sectors allocated in the topmost image, from a
1088 # dirty bitmap, or only new I/O).
1090 # @mode: #optional whether and how QEMU should create a new image, default is
1093 # @speed: #optional the maximum speed, in bytes per second
1095 # @bitmap: #optional the name of dirty bitmap if sync is "incremental".
1096 # Must be present if sync is "incremental", must NOT be present
1097 # otherwise. (Since 2.4)
1099 # @compress: #optional true to compress data, if the target format supports it.
1100 # (default: false) (since 2.8)
1102 # @on-source-error: #optional the action to take on an error on the source,
1103 # default 'report'. 'stop' and 'enospc' can only be used
1104 # if the block device supports io-status (see BlockInfo).
1106 # @on-target-error: #optional the action to take on an error on the target,
1107 # default 'report' (no limitations, since this applies to
1108 # a different block device than @device).
1110 # Note: @on-source-error and @on-target-error only affect background
1111 # I/O. If an error occurs during a guest write request, the device's
1112 # rerror/werror actions will be used.
1116 { 'struct': 'DriveBackup',
1117 'data': { '*job-id': 'str', 'device': 'str', 'target': 'str',
1118 '*format': 'str', 'sync': 'MirrorSyncMode', '*mode': 'NewImageMode',
1119 '*speed': 'int', '*bitmap': 'str', '*compress': 'bool',
1120 '*on-source-error': 'BlockdevOnError',
1121 '*on-target-error': 'BlockdevOnError' } }
1126 # @job-id: #optional identifier for the newly-created block job. If
1127 # omitted, the device name will be used. (Since 2.7)
1129 # @device: the device name or node-name of a root node which should be copied.
1131 # @target: the device name or node-name of the backup target node.
1133 # @sync: what parts of the disk image should be copied to the destination
1134 # (all the disk, only the sectors allocated in the topmost image, or
1137 # @speed: #optional the maximum speed, in bytes per second. The default is 0,
1140 # @compress: #optional true to compress data, if the target format supports it.
1141 # (default: false) (since 2.8)
1143 # @on-source-error: #optional the action to take on an error on the source,
1144 # default 'report'. 'stop' and 'enospc' can only be used
1145 # if the block device supports io-status (see BlockInfo).
1147 # @on-target-error: #optional the action to take on an error on the target,
1148 # default 'report' (no limitations, since this applies to
1149 # a different block device than @device).
1151 # Note: @on-source-error and @on-target-error only affect background
1152 # I/O. If an error occurs during a guest write request, the device's
1153 # rerror/werror actions will be used.
1157 { 'struct': 'BlockdevBackup',
1158 'data': { '*job-id': 'str', 'device': 'str', 'target': 'str',
1159 'sync': 'MirrorSyncMode',
1161 '*compress': 'bool',
1162 '*on-source-error': 'BlockdevOnError',
1163 '*on-target-error': 'BlockdevOnError' } }
1166 # @blockdev-snapshot-sync:
1168 # Generates a synchronous snapshot of a block device.
1170 # For the arguments, see the documentation of BlockdevSnapshotSync.
1172 # Returns: nothing on success
1173 # If @device is not a valid block device, DeviceNotFound
1179 # -> { "execute": "blockdev-snapshot-sync",
1180 # "arguments": { "device": "ide-hd0",
1182 # "/some/place/my-image",
1183 # "format": "qcow2" } }
1184 # <- { "return": {} }
1187 { 'command': 'blockdev-snapshot-sync',
1188 'data': 'BlockdevSnapshotSync' }
1192 # @blockdev-snapshot:
1194 # Generates a snapshot of a block device.
1196 # Create a snapshot, by installing 'node' as the backing image of
1197 # 'overlay'. Additionally, if 'node' is associated with a block
1198 # device, the block device changes to using 'overlay' as its new active
1201 # For the arguments, see the documentation of BlockdevSnapshot.
1207 # -> { "execute": "blockdev-add",
1208 # "arguments": { "options": { "driver": "qcow2",
1209 # "node-name": "node1534",
1210 # "file": { "driver": "file",
1211 # "filename": "hd1.qcow2" },
1212 # "backing": "" } } }
1214 # <- { "return": {} }
1216 # -> { "execute": "blockdev-snapshot",
1217 # "arguments": { "node": "ide-hd0",
1218 # "overlay": "node1534" } }
1219 # <- { "return": {} }
1222 { 'command': 'blockdev-snapshot',
1223 'data': 'BlockdevSnapshot' }
1226 # @change-backing-file:
1228 # Change the backing file in the image file metadata. This does not
1229 # cause QEMU to reopen the image file to reparse the backing filename
1230 # (it may, however, perform a reopen to change permissions from
1231 # r/o -> r/w -> r/o, if needed). The new backing file string is written
1232 # into the image file metadata, and the QEMU internal strings are
1235 # @image-node-name: The name of the block driver state node of the
1236 # image to modify. The "device" argument is used
1237 # to verify "image-node-name" is in the chain
1238 # described by "device".
1240 # @device: The device name or node-name of the root node that owns
1243 # @backing-file: The string to write as the backing file. This
1244 # string is not validated, so care should be taken
1245 # when specifying the string or the image chain may
1246 # not be able to be reopened again.
1248 # Returns: Nothing on success
1250 # If "device" does not exist or cannot be determined, DeviceNotFound
1254 { 'command': 'change-backing-file',
1255 'data': { 'device': 'str', 'image-node-name': 'str',
1256 'backing-file': 'str' } }
1261 # Live commit of data from overlay image nodes into backing nodes - i.e.,
1262 # writes data between 'top' and 'base' into 'base'.
1264 # @job-id: #optional identifier for the newly-created block job. If
1265 # omitted, the device name will be used. (Since 2.7)
1267 # @device: the device name or node-name of a root node
1269 # @base: #optional The file name of the backing image to write data into.
1270 # If not specified, this is the deepest backing image.
1272 # @top: #optional The file name of the backing image within the image chain,
1273 # which contains the topmost data to be committed down. If
1274 # not specified, this is the active layer.
1276 # @backing-file: #optional The backing file string to write into the overlay
1277 # image of 'top'. If 'top' is the active layer,
1278 # specifying a backing file string is an error. This
1279 # filename is not validated.
1281 # If a pathname string is such that it cannot be
1282 # resolved by QEMU, that means that subsequent QMP or
1283 # HMP commands must use node-names for the image in
1284 # question, as filename lookup methods will fail.
1286 # If not specified, QEMU will automatically determine
1287 # the backing file string to use, or error out if
1288 # there is no obvious choice. Care should be taken
1289 # when specifying the string, to specify a valid
1290 # filename or protocol.
1293 # If top == base, that is an error.
1294 # If top == active, the job will not be completed by itself,
1295 # user needs to complete the job with the block-job-complete
1296 # command after getting the ready event. (Since 2.0)
1298 # If the base image is smaller than top, then the base image
1299 # will be resized to be the same size as top. If top is
1300 # smaller than the base image, the base will not be
1301 # truncated. If you want the base image size to match the
1302 # size of the smaller top, you can safely truncate it
1303 # yourself once the commit operation successfully completes.
1305 # @speed: #optional the maximum speed, in bytes per second
1307 # @filter-node-name: #optional the node name that should be assigned to the
1308 # filter driver that the commit job inserts into the graph
1309 # above @top. If this option is not given, a node name is
1310 # autogenerated. (Since: 2.9)
1312 # Returns: Nothing on success
1313 # If commit or stream is already active on this device, DeviceInUse
1314 # If @device does not exist, DeviceNotFound
1315 # If image commit is not supported by this device, NotSupported
1316 # If @base or @top is invalid, a generic error is returned
1317 # If @speed is invalid, InvalidParameter
1323 # -> { "execute": "block-commit",
1324 # "arguments": { "device": "virtio0",
1325 # "top": "/tmp/snap1.qcow2" } }
1326 # <- { "return": {} }
1329 { 'command': 'block-commit',
1330 'data': { '*job-id': 'str', 'device': 'str', '*base': 'str', '*top': 'str',
1331 '*backing-file': 'str', '*speed': 'int',
1332 '*filter-node-name': 'str' } }
1337 # Start a point-in-time copy of a block device to a new destination. The
1338 # status of ongoing drive-backup operations can be checked with
1339 # query-block-jobs where the BlockJobInfo.type field has the value 'backup'.
1340 # The operation can be stopped before it has completed using the
1341 # block-job-cancel command.
1343 # For the arguments, see the documentation of DriveBackup.
1345 # Returns: nothing on success
1346 # If @device is not a valid block device, GenericError
1352 # -> { "execute": "drive-backup",
1353 # "arguments": { "device": "drive0",
1355 # "target": "backup.img" } }
1356 # <- { "return": {} }
1359 { 'command': 'drive-backup', 'boxed': true,
1360 'data': 'DriveBackup' }
1365 # Start a point-in-time copy of a block device to a new destination. The
1366 # status of ongoing blockdev-backup operations can be checked with
1367 # query-block-jobs where the BlockJobInfo.type field has the value 'backup'.
1368 # The operation can be stopped before it has completed using the
1369 # block-job-cancel command.
1371 # For the arguments, see the documentation of BlockdevBackup.
1373 # Returns: nothing on success
1374 # If @device is not a valid block device, DeviceNotFound
1379 # -> { "execute": "blockdev-backup",
1380 # "arguments": { "device": "src-id",
1382 # "target": "tgt-id" } }
1383 # <- { "return": {} }
1386 { 'command': 'blockdev-backup', 'boxed': true,
1387 'data': 'BlockdevBackup' }
1391 # @query-named-block-nodes:
1393 # Get the named block driver list
1395 # Returns: the list of BlockDeviceInfo
1401 # -> { "execute": "query-named-block-nodes" }
1402 # <- { "return": [ { "ro":false,
1404 # "encrypted":false,
1405 # "file":"disks/test.qcow2",
1406 # "node-name": "my-node",
1407 # "backing_file_depth":1,
1414 # "bps_max": 8000000,
1421 # "write_threshold": 0,
1423 # "filename":"disks/test.qcow2",
1425 # "virtual-size":2048000,
1426 # "backing_file":"base.qcow2",
1427 # "full-backing-filename":"disks/base.qcow2",
1428 # "backing-filename-format":"qcow2",
1432 # "name": "snapshot1",
1433 # "vm-state-size": 0,
1434 # "date-sec": 10000200,
1436 # "vm-clock-sec": 206,
1437 # "vm-clock-nsec": 30
1441 # "filename":"disks/base.qcow2",
1443 # "virtual-size":2048000
1448 { 'command': 'query-named-block-nodes', 'returns': [ 'BlockDeviceInfo' ] }
1453 # Start mirroring a block device's writes to a new destination. target
1454 # specifies the target of the new image. If the file exists, or if it
1455 # is a device, it will be used as the new destination for writes. If
1456 # it does not exist, a new file will be created. format specifies the
1457 # format of the mirror image, default is to probe if mode='existing',
1458 # else the format of the source.
1460 # See DriveMirror for parameter descriptions
1462 # Returns: nothing on success
1463 # If @device is not a valid block device, GenericError
1469 # -> { "execute": "drive-mirror",
1470 # "arguments": { "device": "ide-hd0",
1471 # "target": "/some/place/my-image",
1473 # "format": "qcow2" } }
1474 # <- { "return": {} }
1477 { 'command': 'drive-mirror', 'boxed': true,
1478 'data': 'DriveMirror' }
1483 # A set of parameters describing drive mirror setup.
1485 # @job-id: #optional identifier for the newly-created block job. If
1486 # omitted, the device name will be used. (Since 2.7)
1488 # @device: the device name or node-name of a root node whose writes should be
1491 # @target: the target of the new image. If the file exists, or if it
1492 # is a device, the existing file/device will be used as the new
1493 # destination. If it does not exist, a new file will be created.
1495 # @format: #optional the format of the new destination, default is to
1496 # probe if @mode is 'existing', else the format of the source
1498 # @node-name: #optional the new block driver state node name in the graph
1501 # @replaces: #optional with sync=full graph node name to be replaced by the new
1502 # image when a whole image copy is done. This can be used to repair
1503 # broken Quorum files. (Since 2.1)
1505 # @mode: #optional whether and how QEMU should create a new image, default is
1508 # @speed: #optional the maximum speed, in bytes per second
1510 # @sync: what parts of the disk image should be copied to the destination
1511 # (all the disk, only the sectors allocated in the topmost image, or
1514 # @granularity: #optional granularity of the dirty bitmap, default is 64K
1515 # if the image format doesn't have clusters, 4K if the clusters
1516 # are smaller than that, else the cluster size. Must be a
1517 # power of 2 between 512 and 64M (since 1.4).
1519 # @buf-size: #optional maximum amount of data in flight from source to
1520 # target (since 1.4).
1522 # @on-source-error: #optional the action to take on an error on the source,
1523 # default 'report'. 'stop' and 'enospc' can only be used
1524 # if the block device supports io-status (see BlockInfo).
1526 # @on-target-error: #optional the action to take on an error on the target,
1527 # default 'report' (no limitations, since this applies to
1528 # a different block device than @device).
1529 # @unmap: #optional Whether to try to unmap target sectors where source has
1530 # only zero. If true, and target unallocated sectors will read as zero,
1531 # target image sectors will be unmapped; otherwise, zeroes will be
1532 # written. Both will result in identical contents.
1533 # Default is true. (Since 2.4)
1537 { 'struct': 'DriveMirror',
1538 'data': { '*job-id': 'str', 'device': 'str', 'target': 'str',
1539 '*format': 'str', '*node-name': 'str', '*replaces': 'str',
1540 'sync': 'MirrorSyncMode', '*mode': 'NewImageMode',
1541 '*speed': 'int', '*granularity': 'uint32',
1542 '*buf-size': 'int', '*on-source-error': 'BlockdevOnError',
1543 '*on-target-error': 'BlockdevOnError',
1544 '*unmap': 'bool' } }
1547 # @BlockDirtyBitmap:
1549 # @node: name of device/node which the bitmap is tracking
1551 # @name: name of the dirty bitmap
1555 { 'struct': 'BlockDirtyBitmap',
1556 'data': { 'node': 'str', 'name': 'str' } }
1559 # @BlockDirtyBitmapAdd:
1561 # @node: name of device/node which the bitmap is tracking
1563 # @name: name of the dirty bitmap
1565 # @granularity: #optional the bitmap granularity, default is 64k for
1566 # block-dirty-bitmap-add
1570 { 'struct': 'BlockDirtyBitmapAdd',
1571 'data': { 'node': 'str', 'name': 'str', '*granularity': 'uint32' } }
1574 # @block-dirty-bitmap-add:
1576 # Create a dirty bitmap with a name on the node, and start tracking the writes.
1578 # Returns: nothing on success
1579 # If @node is not a valid block device or node, DeviceNotFound
1580 # If @name is already taken, GenericError with an explanation
1586 # -> { "execute": "block-dirty-bitmap-add",
1587 # "arguments": { "node": "drive0", "name": "bitmap0" } }
1588 # <- { "return": {} }
1591 { 'command': 'block-dirty-bitmap-add',
1592 'data': 'BlockDirtyBitmapAdd' }
1595 # @block-dirty-bitmap-remove:
1597 # Stop write tracking and remove the dirty bitmap that was created
1598 # with block-dirty-bitmap-add.
1600 # Returns: nothing on success
1601 # If @node is not a valid block device or node, DeviceNotFound
1602 # If @name is not found, GenericError with an explanation
1603 # if @name is frozen by an operation, GenericError
1609 # -> { "execute": "block-dirty-bitmap-remove",
1610 # "arguments": { "node": "drive0", "name": "bitmap0" } }
1611 # <- { "return": {} }
1614 { 'command': 'block-dirty-bitmap-remove',
1615 'data': 'BlockDirtyBitmap' }
1618 # @block-dirty-bitmap-clear:
1620 # Clear (reset) a dirty bitmap on the device, so that an incremental
1621 # backup from this point in time forward will only backup clusters
1622 # modified after this clear operation.
1624 # Returns: nothing on success
1625 # If @node is not a valid block device, DeviceNotFound
1626 # If @name is not found, GenericError with an explanation
1632 # -> { "execute": "block-dirty-bitmap-clear",
1633 # "arguments": { "node": "drive0", "name": "bitmap0" } }
1634 # <- { "return": {} }
1637 { 'command': 'block-dirty-bitmap-clear',
1638 'data': 'BlockDirtyBitmap' }
1643 # Start mirroring a block device's writes to a new destination.
1645 # @job-id: #optional identifier for the newly-created block job. If
1646 # omitted, the device name will be used. (Since 2.7)
1648 # @device: The device name or node-name of a root node whose writes should be
1651 # @target: the id or node-name of the block device to mirror to. This mustn't be
1652 # attached to guest.
1654 # @replaces: #optional with sync=full graph node name to be replaced by the new
1655 # image when a whole image copy is done. This can be used to repair
1656 # broken Quorum files.
1658 # @speed: #optional the maximum speed, in bytes per second
1660 # @sync: what parts of the disk image should be copied to the destination
1661 # (all the disk, only the sectors allocated in the topmost image, or
1664 # @granularity: #optional granularity of the dirty bitmap, default is 64K
1665 # if the image format doesn't have clusters, 4K if the clusters
1666 # are smaller than that, else the cluster size. Must be a
1667 # power of 2 between 512 and 64M
1669 # @buf-size: #optional maximum amount of data in flight from source to
1672 # @on-source-error: #optional the action to take on an error on the source,
1673 # default 'report'. 'stop' and 'enospc' can only be used
1674 # if the block device supports io-status (see BlockInfo).
1676 # @on-target-error: #optional the action to take on an error on the target,
1677 # default 'report' (no limitations, since this applies to
1678 # a different block device than @device).
1680 # @filter-node-name: #optional the node name that should be assigned to the
1681 # filter driver that the mirror job inserts into the graph
1682 # above @device. If this option is not given, a node name is
1683 # autogenerated. (Since: 2.9)
1685 # Returns: nothing on success.
1691 # -> { "execute": "blockdev-mirror",
1692 # "arguments": { "device": "ide-hd0",
1693 # "target": "target0",
1694 # "sync": "full" } }
1695 # <- { "return": {} }
1698 { 'command': 'blockdev-mirror',
1699 'data': { '*job-id': 'str', 'device': 'str', 'target': 'str',
1701 'sync': 'MirrorSyncMode',
1702 '*speed': 'int', '*granularity': 'uint32',
1703 '*buf-size': 'int', '*on-source-error': 'BlockdevOnError',
1704 '*on-target-error': 'BlockdevOnError',
1705 '*filter-node-name': 'str' } }
1708 # @block_set_io_throttle:
1710 # Change I/O throttle limits for a block drive.
1712 # Since QEMU 2.4, each device with I/O limits is member of a throttle
1715 # If two or more devices are members of the same group, the limits
1716 # will apply to the combined I/O of the whole group in a round-robin
1717 # fashion. Therefore, setting new I/O limits to a device will affect
1720 # The name of the group can be specified using the 'group' parameter.
1721 # If the parameter is unset, it is assumed to be the current group of
1722 # that device. If it's not in any group yet, the name of the device
1723 # will be used as the name for its group.
1725 # The 'group' parameter can also be used to move a device to a
1726 # different group. In this case the limits specified in the parameters
1727 # will be applied to the new group only.
1729 # I/O limits can be disabled by setting all of them to 0. In this case
1730 # the device will be removed from its group and the rest of its
1731 # members will not be affected. The 'group' parameter is ignored.
1733 # See BlockIOThrottle for parameter descriptions.
1735 # Returns: Nothing on success
1736 # If @device is not a valid block device, DeviceNotFound
1742 # -> { "execute": "block_set_io_throttle",
1743 # "arguments": { "id": "ide0-1-0",
1750 # "bps_max": 8000000,
1756 # "bps_max_length": 60,
1757 # "iops_size": 0 } }
1758 # <- { "return": {} }
1760 { 'command': 'block_set_io_throttle', 'boxed': true,
1761 'data': 'BlockIOThrottle' }
1766 # A set of parameters describing block throttling.
1768 # @device: #optional Block device name (deprecated, use @id instead)
1770 # @id: #optional The name or QOM path of the guest device (since: 2.8)
1772 # @bps: total throughput limit in bytes per second
1774 # @bps_rd: read throughput limit in bytes per second
1776 # @bps_wr: write throughput limit in bytes per second
1778 # @iops: total I/O operations per second
1780 # @iops_rd: read I/O operations per second
1782 # @iops_wr: write I/O operations per second
1784 # @bps_max: #optional total throughput limit during bursts,
1785 # in bytes (Since 1.7)
1787 # @bps_rd_max: #optional read throughput limit during bursts,
1788 # in bytes (Since 1.7)
1790 # @bps_wr_max: #optional write throughput limit during bursts,
1791 # in bytes (Since 1.7)
1793 # @iops_max: #optional total I/O operations per second during bursts,
1794 # in bytes (Since 1.7)
1796 # @iops_rd_max: #optional read I/O operations per second during bursts,
1797 # in bytes (Since 1.7)
1799 # @iops_wr_max: #optional write I/O operations per second during bursts,
1800 # in bytes (Since 1.7)
1802 # @bps_max_length: #optional maximum length of the @bps_max burst
1803 # period, in seconds. It must only
1804 # be set if @bps_max is set as well.
1805 # Defaults to 1. (Since 2.6)
1807 # @bps_rd_max_length: #optional maximum length of the @bps_rd_max
1808 # burst period, in seconds. It must only
1809 # be set if @bps_rd_max is set as well.
1810 # Defaults to 1. (Since 2.6)
1812 # @bps_wr_max_length: #optional maximum length of the @bps_wr_max
1813 # burst period, in seconds. It must only
1814 # be set if @bps_wr_max is set as well.
1815 # Defaults to 1. (Since 2.6)
1817 # @iops_max_length: #optional maximum length of the @iops burst
1818 # period, in seconds. It must only
1819 # be set if @iops_max is set as well.
1820 # Defaults to 1. (Since 2.6)
1822 # @iops_rd_max_length: #optional maximum length of the @iops_rd_max
1823 # burst period, in seconds. It must only
1824 # be set if @iops_rd_max is set as well.
1825 # Defaults to 1. (Since 2.6)
1827 # @iops_wr_max_length: #optional maximum length of the @iops_wr_max
1828 # burst period, in seconds. It must only
1829 # be set if @iops_wr_max is set as well.
1830 # Defaults to 1. (Since 2.6)
1832 # @iops_size: #optional an I/O size in bytes (Since 1.7)
1834 # @group: #optional throttle group name (Since 2.4)
1838 { 'struct': 'BlockIOThrottle',
1839 'data': { '*device': 'str', '*id': 'str', 'bps': 'int', 'bps_rd': 'int',
1840 'bps_wr': 'int', 'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int',
1841 '*bps_max': 'int', '*bps_rd_max': 'int',
1842 '*bps_wr_max': 'int', '*iops_max': 'int',
1843 '*iops_rd_max': 'int', '*iops_wr_max': 'int',
1844 '*bps_max_length': 'int', '*bps_rd_max_length': 'int',
1845 '*bps_wr_max_length': 'int', '*iops_max_length': 'int',
1846 '*iops_rd_max_length': 'int', '*iops_wr_max_length': 'int',
1847 '*iops_size': 'int', '*group': 'str' } }
1852 # Copy data from a backing file into a block device.
1854 # The block streaming operation is performed in the background until the entire
1855 # backing file has been copied. This command returns immediately once streaming
1856 # has started. The status of ongoing block streaming operations can be checked
1857 # with query-block-jobs. The operation can be stopped before it has completed
1858 # using the block-job-cancel command.
1860 # The node that receives the data is called the top image, can be located in
1861 # any part of the chain (but always above the base image; see below) and can be
1862 # specified using its device or node name. Earlier qemu versions only allowed
1863 # 'device' to name the top level node; presence of the 'base-node' parameter
1864 # during introspection can be used as a witness of the enhanced semantics
1867 # If a base file is specified then sectors are not copied from that base file and
1868 # its backing chain. When streaming completes the image file will have the base
1869 # file as its backing file. This can be used to stream a subset of the backing
1870 # file chain instead of flattening the entire image.
1872 # On successful completion the image file is updated to drop the backing file
1873 # and the BLOCK_JOB_COMPLETED event is emitted.
1875 # @job-id: #optional identifier for the newly-created block job. If
1876 # omitted, the device name will be used. (Since 2.7)
1878 # @device: the device or node name of the top image
1880 # @base: #optional the common backing file name.
1881 # It cannot be set if @base-node is also set.
1883 # @base-node: #optional the node name of the backing file.
1884 # It cannot be set if @base is also set. (Since 2.8)
1886 # @backing-file: #optional The backing file string to write into the top
1887 # image. This filename is not validated.
1889 # If a pathname string is such that it cannot be
1890 # resolved by QEMU, that means that subsequent QMP or
1891 # HMP commands must use node-names for the image in
1892 # question, as filename lookup methods will fail.
1894 # If not specified, QEMU will automatically determine
1895 # the backing file string to use, or error out if there
1896 # is no obvious choice. Care should be taken when
1897 # specifying the string, to specify a valid filename or
1901 # @speed: #optional the maximum speed, in bytes per second
1903 # @on-error: #optional the action to take on an error (default report).
1904 # 'stop' and 'enospc' can only be used if the block device
1905 # supports io-status (see BlockInfo). Since 1.3.
1907 # Returns: Nothing on success. If @device does not exist, DeviceNotFound.
1913 # -> { "execute": "block-stream",
1914 # "arguments": { "device": "virtio0",
1915 # "base": "/tmp/master.qcow2" } }
1916 # <- { "return": {} }
1919 { 'command': 'block-stream',
1920 'data': { '*job-id': 'str', 'device': 'str', '*base': 'str',
1921 '*base-node': 'str', '*backing-file': 'str', '*speed': 'int',
1922 '*on-error': 'BlockdevOnError' } }
1925 # @block-job-set-speed:
1927 # Set maximum speed for a background block operation.
1929 # This command can only be issued when there is an active block job.
1931 # Throttling can be disabled by setting the speed to 0.
1933 # @device: The job identifier. This used to be a device name (hence
1934 # the name of the parameter), but since QEMU 2.7 it can have
1937 # @speed: the maximum speed, in bytes per second, or 0 for unlimited.
1940 # Returns: Nothing on success
1941 # If no background operation is active on this device, DeviceNotActive
1945 { 'command': 'block-job-set-speed',
1946 'data': { 'device': 'str', 'speed': 'int' } }
1949 # @block-job-cancel:
1951 # Stop an active background block operation.
1953 # This command returns immediately after marking the active background block
1954 # operation for cancellation. It is an error to call this command if no
1955 # operation is in progress.
1957 # The operation will cancel as soon as possible and then emit the
1958 # BLOCK_JOB_CANCELLED event. Before that happens the job is still visible when
1959 # enumerated using query-block-jobs.
1961 # For streaming, the image file retains its backing file unless the streaming
1962 # operation happens to complete just as it is being cancelled. A new streaming
1963 # operation can be started at a later time to finish copying all data from the
1966 # @device: The job identifier. This used to be a device name (hence
1967 # the name of the parameter), but since QEMU 2.7 it can have
1970 # @force: #optional whether to allow cancellation of a paused job (default
1971 # false). Since 1.3.
1973 # Returns: Nothing on success
1974 # If no background operation is active on this device, DeviceNotActive
1978 { 'command': 'block-job-cancel', 'data': { 'device': 'str', '*force': 'bool' } }
1983 # Pause an active background block operation.
1985 # This command returns immediately after marking the active background block
1986 # operation for pausing. It is an error to call this command if no
1987 # operation is in progress. Pausing an already paused job has no cumulative
1988 # effect; a single block-job-resume command will resume the job.
1990 # The operation will pause as soon as possible. No event is emitted when
1991 # the operation is actually paused. Cancelling a paused job automatically
1994 # @device: The job identifier. This used to be a device name (hence
1995 # the name of the parameter), but since QEMU 2.7 it can have
1998 # Returns: Nothing on success
1999 # If no background operation is active on this device, DeviceNotActive
2003 { 'command': 'block-job-pause', 'data': { 'device': 'str' } }
2006 # @block-job-resume:
2008 # Resume an active background block operation.
2010 # This command returns immediately after resuming a paused background block
2011 # operation. It is an error to call this command if no operation is in
2012 # progress. Resuming an already running job is not an error.
2014 # This command also clears the error status of the job.
2016 # @device: The job identifier. This used to be a device name (hence
2017 # the name of the parameter), but since QEMU 2.7 it can have
2020 # Returns: Nothing on success
2021 # If no background operation is active on this device, DeviceNotActive
2025 { 'command': 'block-job-resume', 'data': { 'device': 'str' } }
2028 # @block-job-complete:
2030 # Manually trigger completion of an active background block operation. This
2031 # is supported for drive mirroring, where it also switches the device to
2032 # write to the target path only. The ability to complete is signaled with
2033 # a BLOCK_JOB_READY event.
2035 # This command completes an active background block operation synchronously.
2036 # The ordering of this command's return with the BLOCK_JOB_COMPLETED event
2037 # is not defined. Note that if an I/O error occurs during the processing of
2038 # this command: 1) the command itself will fail; 2) the error will be processed
2039 # according to the rerror/werror arguments that were specified when starting
2042 # A cancelled or paused job cannot be completed.
2044 # @device: The job identifier. This used to be a device name (hence
2045 # the name of the parameter), but since QEMU 2.7 it can have
2048 # Returns: Nothing on success
2049 # If no background operation is active on this device, DeviceNotActive
2053 { 'command': 'block-job-complete', 'data': { 'device': 'str' } }
2056 # @BlockdevDiscardOptions:
2058 # Determines how to handle discard requests.
2060 # @ignore: Ignore the request
2061 # @unmap: Forward as an unmap request
2065 { 'enum': 'BlockdevDiscardOptions',
2066 'data': [ 'ignore', 'unmap' ] }
2069 # @BlockdevDetectZeroesOptions:
2071 # Describes the operation mode for the automatic conversion of plain
2072 # zero writes by the OS to driver specific optimized zero write commands.
2074 # @off: Disabled (default)
2076 # @unmap: Enabled and even try to unmap blocks if possible. This requires
2077 # also that @BlockdevDiscardOptions is set to unmap for this device.
2081 { 'enum': 'BlockdevDetectZeroesOptions',
2082 'data': [ 'off', 'on', 'unmap' ] }
2085 # @BlockdevAioOptions:
2087 # Selects the AIO backend to handle I/O requests
2089 # @threads: Use qemu's thread pool
2090 # @native: Use native AIO backend (only Linux and Windows)
2094 { 'enum': 'BlockdevAioOptions',
2095 'data': [ 'threads', 'native' ] }
2098 # @BlockdevCacheOptions:
2100 # Includes cache-related options for block devices
2102 # @direct: #optional enables use of O_DIRECT (bypass the host page cache;
2104 # @no-flush: #optional ignore any flush requests for the device (default:
2109 { 'struct': 'BlockdevCacheOptions',
2110 'data': { '*direct': 'bool',
2111 '*no-flush': 'bool' } }
2116 # Drivers that are supported in block device operations.
2118 # @host_device: Since 2.1
2119 # @host_cdrom: Since 2.1
2120 # @gluster: Since 2.7
2123 # @replication: Since 2.8
2129 { 'enum': 'BlockdevDriver',
2130 'data': [ 'archipelago', 'blkdebug', 'blkverify', 'bochs', 'cloop',
2131 'dmg', 'file', 'ftp', 'ftps', 'gluster', 'host_cdrom',
2132 'host_device', 'http', 'https', 'iscsi', 'luks', 'nbd', 'nfs',
2133 'null-aio', 'null-co', 'parallels', 'qcow', 'qcow2', 'qed',
2134 'quorum', 'raw', 'replication', 'ssh', 'vdi', 'vhdx', 'vmdk',
2138 # @BlockdevOptionsFile:
2140 # Driver specific block device options for the file backend.
2142 # @filename: path to the image file
2143 # @aio: #optional AIO backend (default: threads) (since: 2.8)
2147 { 'struct': 'BlockdevOptionsFile',
2148 'data': { 'filename': 'str',
2149 '*aio': 'BlockdevAioOptions' } }
2152 # @BlockdevOptionsNull:
2154 # Driver specific block device options for the null backend.
2156 # @size: #optional size of the device in bytes.
2157 # @latency-ns: #optional emulated latency (in nanoseconds) in processing
2158 # requests. Default to zero which completes requests immediately.
2163 { 'struct': 'BlockdevOptionsNull',
2164 'data': { '*size': 'int', '*latency-ns': 'uint64' } }
2167 # @BlockdevOptionsVVFAT:
2169 # Driver specific block device options for the vvfat protocol.
2171 # @dir: directory to be exported as FAT image
2172 # @fat-type: #optional FAT type: 12, 16 or 32
2173 # @floppy: #optional whether to export a floppy image (true) or
2174 # partitioned hard disk (false; default)
2175 # @label: #optional set the volume label, limited to 11 bytes. FAT16 and
2176 # FAT32 traditionally have some restrictions on labels, which are
2177 # ignored by most operating systems. Defaults to "QEMU VVFAT".
2179 # @rw: #optional whether to allow write operations (default: false)
2183 { 'struct': 'BlockdevOptionsVVFAT',
2184 'data': { 'dir': 'str', '*fat-type': 'int', '*floppy': 'bool',
2185 '*label': 'str', '*rw': 'bool' } }
2188 # @BlockdevOptionsGenericFormat:
2190 # Driver specific block device options for image format that have no option
2191 # besides their data source.
2193 # @file: reference to or definition of the data source block device
2197 { 'struct': 'BlockdevOptionsGenericFormat',
2198 'data': { 'file': 'BlockdevRef' } }
2201 # @BlockdevOptionsLUKS:
2203 # Driver specific block device options for LUKS.
2205 # @key-secret: #optional the ID of a QCryptoSecret object providing
2206 # the decryption key (since 2.6). Mandatory except when
2207 # doing a metadata-only probe of the image.
2211 { 'struct': 'BlockdevOptionsLUKS',
2212 'base': 'BlockdevOptionsGenericFormat',
2213 'data': { '*key-secret': 'str' } }
2217 # @BlockdevOptionsGenericCOWFormat:
2219 # Driver specific block device options for image format that have no option
2220 # besides their data source and an optional backing file.
2222 # @backing: #optional reference to or definition of the backing file block
2223 # device (if missing, taken from the image file content). It is
2224 # allowed to pass an empty string here in order to disable the
2225 # default backing file.
2229 { 'struct': 'BlockdevOptionsGenericCOWFormat',
2230 'base': 'BlockdevOptionsGenericFormat',
2231 'data': { '*backing': 'BlockdevRef' } }
2234 # @Qcow2OverlapCheckMode:
2236 # General overlap check modes.
2238 # @none: Do not perform any checks
2240 # @constant: Perform only checks which can be done in constant time and
2241 # without reading anything from disk
2243 # @cached: Perform only checks which can be done without reading anything
2246 # @all: Perform all available overlap checks
2250 { 'enum': 'Qcow2OverlapCheckMode',
2251 'data': [ 'none', 'constant', 'cached', 'all' ] }
2254 # @Qcow2OverlapCheckFlags:
2256 # Structure of flags for each metadata structure. Setting a field to 'true'
2257 # makes qemu guard that structure against unintended overwriting. The default
2258 # value is chosen according to the template given.
2260 # @template: Specifies a template mode which can be adjusted using the other
2261 # flags, defaults to 'cached'
2265 { 'struct': 'Qcow2OverlapCheckFlags',
2266 'data': { '*template': 'Qcow2OverlapCheckMode',
2267 '*main-header': 'bool',
2268 '*active-l1': 'bool',
2269 '*active-l2': 'bool',
2270 '*refcount-table': 'bool',
2271 '*refcount-block': 'bool',
2272 '*snapshot-table': 'bool',
2273 '*inactive-l1': 'bool',
2274 '*inactive-l2': 'bool' } }
2277 # @Qcow2OverlapChecks:
2279 # Specifies which metadata structures should be guarded against unintended
2282 # @flags: set of flags for separate specification of each metadata structure
2285 # @mode: named mode which chooses a specific set of flags
2289 { 'alternate': 'Qcow2OverlapChecks',
2290 'data': { 'flags': 'Qcow2OverlapCheckFlags',
2291 'mode': 'Qcow2OverlapCheckMode' } }
2294 # @BlockdevOptionsQcow2:
2296 # Driver specific block device options for qcow2.
2298 # @lazy-refcounts: #optional whether to enable the lazy refcounts
2299 # feature (default is taken from the image file)
2301 # @pass-discard-request: #optional whether discard requests to the qcow2
2302 # device should be forwarded to the data source
2304 # @pass-discard-snapshot: #optional whether discard requests for the data source
2305 # should be issued when a snapshot operation (e.g.
2306 # deleting a snapshot) frees clusters in the qcow2 file
2308 # @pass-discard-other: #optional whether discard requests for the data source
2309 # should be issued on other occasions where a cluster
2312 # @overlap-check: #optional which overlap checks to perform for writes
2313 # to the image, defaults to 'cached' (since 2.2)
2315 # @cache-size: #optional the maximum total size of the L2 table and
2316 # refcount block caches in bytes (since 2.2)
2318 # @l2-cache-size: #optional the maximum size of the L2 table cache in
2321 # @refcount-cache-size: #optional the maximum size of the refcount block cache
2322 # in bytes (since 2.2)
2324 # @cache-clean-interval: #optional clean unused entries in the L2 and refcount
2325 # caches. The interval is in seconds. The default value
2326 # is 0 and it disables this feature (since 2.5)
2330 { 'struct': 'BlockdevOptionsQcow2',
2331 'base': 'BlockdevOptionsGenericCOWFormat',
2332 'data': { '*lazy-refcounts': 'bool',
2333 '*pass-discard-request': 'bool',
2334 '*pass-discard-snapshot': 'bool',
2335 '*pass-discard-other': 'bool',
2336 '*overlap-check': 'Qcow2OverlapChecks',
2337 '*cache-size': 'int',
2338 '*l2-cache-size': 'int',
2339 '*refcount-cache-size': 'int',
2340 '*cache-clean-interval': 'int' } }
2344 # @BlockdevOptionsArchipelago:
2346 # Driver specific block device options for Archipelago.
2348 # @volume: Name of the Archipelago volume image
2350 # @mport: #optional The port number on which mapperd is
2351 # listening. This is optional
2352 # and if not specified, QEMU will make Archipelago
2353 # use the default port (1001).
2355 # @vport: #optional The port number on which vlmcd is
2356 # listening. This is optional
2357 # and if not specified, QEMU will make Archipelago
2358 # use the default port (501).
2360 # @segment: #optional The name of the shared memory segment
2361 # Archipelago stack is using. This is optional
2362 # and if not specified, QEMU will make Archipelago
2363 # use the default value, 'archipelago'.
2366 { 'struct': 'BlockdevOptionsArchipelago',
2367 'data': { 'volume': 'str',
2370 '*segment': 'str' } }
2373 # @BlockdevOptionsSsh:
2375 # @server: host address
2377 # @path: path to the image on the host
2379 # @user: #optional user as which to connect, defaults to current
2382 # TODO: Expose the host_key_check option in QMP
2386 { 'struct': 'BlockdevOptionsSsh',
2387 'data': { 'server': 'InetSocketAddress',
2395 # Trigger events supported by blkdebug.
2399 { 'enum': 'BlkdebugEvent', 'prefix': 'BLKDBG',
2400 'data': [ 'l1_update', 'l1_grow_alloc_table', 'l1_grow_write_table',
2401 'l1_grow_activate_table', 'l2_load', 'l2_update',
2402 'l2_update_compressed', 'l2_alloc_cow_read', 'l2_alloc_write',
2403 'read_aio', 'read_backing_aio', 'read_compressed', 'write_aio',
2404 'write_compressed', 'vmstate_load', 'vmstate_save', 'cow_read',
2405 'cow_write', 'reftable_load', 'reftable_grow', 'reftable_update',
2406 'refblock_load', 'refblock_update', 'refblock_update_part',
2407 'refblock_alloc', 'refblock_alloc_hookup', 'refblock_alloc_write',
2408 'refblock_alloc_write_blocks', 'refblock_alloc_write_table',
2409 'refblock_alloc_switch_table', 'cluster_alloc',
2410 'cluster_alloc_bytes', 'cluster_free', 'flush_to_os',
2411 'flush_to_disk', 'pwritev_rmw_head', 'pwritev_rmw_after_head',
2412 'pwritev_rmw_tail', 'pwritev_rmw_after_tail', 'pwritev',
2413 'pwritev_zero', 'pwritev_done', 'empty_image_prepare' ] }
2416 # @BlkdebugInjectErrorOptions:
2418 # Describes a single error injection for blkdebug.
2420 # @event: trigger event
2422 # @state: #optional the state identifier blkdebug needs to be in to
2423 # actually trigger the event; defaults to "any"
2425 # @errno: #optional error identifier (errno) to be returned; defaults to
2428 # @sector: #optional specifies the sector index which has to be affected
2429 # in order to actually trigger the event; defaults to "any
2432 # @once: #optional disables further events after this one has been
2433 # triggered; defaults to false
2435 # @immediately: #optional fail immediately; defaults to false
2439 { 'struct': 'BlkdebugInjectErrorOptions',
2440 'data': { 'event': 'BlkdebugEvent',
2445 '*immediately': 'bool' } }
2448 # @BlkdebugSetStateOptions:
2450 # Describes a single state-change event for blkdebug.
2452 # @event: trigger event
2454 # @state: #optional the current state identifier blkdebug needs to be in;
2457 # @new_state: the state identifier blkdebug is supposed to assume if
2458 # this event is triggered
2462 { 'struct': 'BlkdebugSetStateOptions',
2463 'data': { 'event': 'BlkdebugEvent',
2465 'new_state': 'int' } }
2468 # @BlockdevOptionsBlkdebug:
2470 # Driver specific block device options for blkdebug.
2472 # @image: underlying raw block device (or image file)
2474 # @config: #optional filename of the configuration file
2476 # @align: #optional required alignment for requests in bytes,
2477 # must be power of 2, or 0 for default
2479 # @inject-error: #optional array of error injection descriptions
2481 # @set-state: #optional array of state-change descriptions
2485 { 'struct': 'BlockdevOptionsBlkdebug',
2486 'data': { 'image': 'BlockdevRef',
2489 '*inject-error': ['BlkdebugInjectErrorOptions'],
2490 '*set-state': ['BlkdebugSetStateOptions'] } }
2493 # @BlockdevOptionsBlkverify:
2495 # Driver specific block device options for blkverify.
2497 # @test: block device to be tested
2499 # @raw: raw image used for verification
2503 { 'struct': 'BlockdevOptionsBlkverify',
2504 'data': { 'test': 'BlockdevRef',
2505 'raw': 'BlockdevRef' } }
2508 # @QuorumReadPattern:
2510 # An enumeration of quorum read patterns.
2512 # @quorum: read all the children and do a quorum vote on reads
2514 # @fifo: read only from the first child that has not failed
2518 { 'enum': 'QuorumReadPattern', 'data': [ 'quorum', 'fifo' ] }
2521 # @BlockdevOptionsQuorum:
2523 # Driver specific block device options for Quorum
2525 # @blkverify: #optional true if the driver must print content mismatch
2526 # set to false by default
2528 # @children: the children block devices to use
2530 # @vote-threshold: the vote limit under which a read will fail
2532 # @rewrite-corrupted: #optional rewrite corrupted data when quorum is reached
2535 # @read-pattern: #optional choose read pattern and set to quorum by default
2540 { 'struct': 'BlockdevOptionsQuorum',
2541 'data': { '*blkverify': 'bool',
2542 'children': [ 'BlockdevRef' ],
2543 'vote-threshold': 'int',
2544 '*rewrite-corrupted': 'bool',
2545 '*read-pattern': 'QuorumReadPattern' } }
2548 # @GlusterTransport:
2550 # An enumeration of Gluster transport types
2552 # @tcp: TCP - Transmission Control Protocol
2554 # @unix: UNIX - Unix domain socket
2558 { 'enum': 'GlusterTransport',
2559 'data': [ 'unix', 'tcp' ] }
2565 # Captures the address of a socket
2567 # Details for connecting to a gluster server
2569 # @type: Transport type used for gluster connection
2571 # This is similar to SocketAddress, only distinction:
2573 # 1. GlusterServer is a flat union, SocketAddress is a simple union.
2574 # A flat union is nicer than simple because it avoids nesting
2575 # (i.e. more {}) on the wire.
2577 # 2. GlusterServer lacks case 'fd', since gluster doesn't let you
2578 # pass in a file descriptor.
2580 # GlusterServer is actually not Gluster-specific, its a
2581 # compatibility evolved into an alternate for SocketAddress.
2585 { 'union': 'GlusterServer',
2586 'base': { 'type': 'GlusterTransport' },
2587 'discriminator': 'type',
2588 'data': { 'unix': 'UnixSocketAddress',
2589 'tcp': 'InetSocketAddress' } }
2592 # @BlockdevOptionsGluster:
2594 # Driver specific block device options for Gluster
2596 # @volume: name of gluster volume where VM image resides
2598 # @path: absolute path to image file in gluster volume
2600 # @server: gluster servers description
2602 # @debug: #optional libgfapi log level (default '4' which is Error)
2605 # @logfile: #optional libgfapi log file (default /dev/stderr) (Since 2.8)
2609 { 'struct': 'BlockdevOptionsGluster',
2610 'data': { 'volume': 'str',
2612 'server': ['GlusterServer'],
2614 '*logfile': 'str' } }
2619 # An enumeration of libiscsi transport types
2623 { 'enum': 'IscsiTransport',
2624 'data': [ 'tcp', 'iser' ] }
2627 # @IscsiHeaderDigest:
2629 # An enumeration of header digests supported by libiscsi
2633 { 'enum': 'IscsiHeaderDigest',
2634 'prefix': 'QAPI_ISCSI_HEADER_DIGEST',
2635 'data': [ 'crc32c', 'none', 'crc32c-none', 'none-crc32c' ] }
2638 # @BlockdevOptionsIscsi:
2640 # @transport: The iscsi transport type
2642 # @portal: The address of the iscsi portal
2644 # @target: The target iqn name
2646 # @lun: #optional LUN to connect to. Defaults to 0.
2648 # @user: #optional User name to log in with. If omitted, no CHAP
2649 # authentication is performed.
2651 # @password-secret: #optional The ID of a QCryptoSecret object providing
2652 # the password for the login. This option is required if
2653 # @user is specified.
2655 # @initiator-name: #optional The iqn name we want to identify to the target
2656 # as. If this option is not specified, an initiator name is
2657 # generated automatically.
2659 # @header-digest: #optional The desired header digest. Defaults to
2662 # @timeout: #optional Timeout in seconds after which a request will
2663 # timeout. 0 means no timeout and is the default.
2665 # Driver specific block device options for iscsi
2669 { 'struct': 'BlockdevOptionsIscsi',
2670 'data': { 'transport': 'IscsiTransport',
2675 '*password-secret': 'str',
2676 '*initiator-name': 'str',
2677 '*header-digest': 'IscsiHeaderDigest',
2678 '*timeout': 'int' } }
2683 # An enumeration of replication modes.
2685 # @primary: Primary mode, the vm's state will be sent to secondary QEMU.
2687 # @secondary: Secondary mode, receive the vm's state from primary QEMU.
2691 { 'enum' : 'ReplicationMode', 'data' : [ 'primary', 'secondary' ] }
2694 # @BlockdevOptionsReplication:
2696 # Driver specific block device options for replication
2698 # @mode: the replication mode
2700 # @top-id: #optional In secondary mode, node name or device ID of the root
2701 # node who owns the replication node chain. Must not be given in
2706 { 'struct': 'BlockdevOptionsReplication',
2707 'base': 'BlockdevOptionsGenericFormat',
2708 'data': { 'mode': 'ReplicationMode',
2709 '*top-id': 'str' } }
2714 # An enumeration of NFS transport types
2716 # @inet: TCP transport
2720 { 'enum': 'NFSTransport',
2721 'data': [ 'inet' ] }
2726 # Captures the address of the socket
2728 # @type: transport type used for NFS (only TCP supported)
2730 # @host: host address for NFS server
2734 { 'struct': 'NFSServer',
2735 'data': { 'type': 'NFSTransport',
2739 # @BlockdevOptionsNfs:
2741 # Driver specific block device option for NFS
2743 # @server: host address
2745 # @path: path of the image on the host
2747 # @user: #optional UID value to use when talking to the
2748 # server (defaults to 65534 on Windows and getuid()
2751 # @group: #optional GID value to use when talking to the
2752 # server (defaults to 65534 on Windows and getgid()
2755 # @tcp-syn-count: #optional number of SYNs during the session
2756 # establishment (defaults to libnfs default)
2758 # @readahead-size: #optional set the readahead size in bytes (defaults
2759 # to libnfs default)
2761 # @page-cache-size: #optional set the pagecache size in bytes (defaults
2762 # to libnfs default)
2764 # @debug: #optional set the NFS debug level (max 2) (defaults
2765 # to libnfs default)
2769 { 'struct': 'BlockdevOptionsNfs',
2770 'data': { 'server': 'NFSServer',
2774 '*tcp-syn-count': 'int',
2775 '*readahead-size': 'int',
2776 '*page-cache-size': 'int',
2780 # @BlockdevOptionsCurl:
2782 # Driver specific block device options for the curl backend.
2784 # @filename: path to the image file
2788 { 'struct': 'BlockdevOptionsCurl',
2789 'data': { 'filename': 'str' } }
2792 # @BlockdevOptionsNbd:
2794 # Driver specific block device options for NBD.
2796 # @server: NBD server address
2798 # @export: #optional export name
2800 # @tls-creds: #optional TLS credentials ID
2804 { 'struct': 'BlockdevOptionsNbd',
2805 'data': { 'server': 'SocketAddress',
2807 '*tls-creds': 'str' } }
2810 # @BlockdevOptionsRaw:
2812 # Driver specific block device options for the raw driver.
2814 # @offset: #optional position where the block device starts
2815 # @size: #optional the assumed size of the device
2819 { 'struct': 'BlockdevOptionsRaw',
2820 'base': 'BlockdevOptionsGenericFormat',
2821 'data': { '*offset': 'int', '*size': 'int' } }
2826 # Options for creating a block device. Many options are available for all
2827 # block devices, independent of the block driver:
2829 # @driver: block driver name
2830 # @node-name: #optional the node name of the new node (Since 2.0).
2831 # This option is required on the top level of blockdev-add.
2832 # @discard: #optional discard-related options (default: ignore)
2833 # @cache: #optional cache-related options
2834 # @read-only: #optional whether the block device should be read-only
2836 # @detect-zeroes: #optional detect and optimize zero writes (Since 2.1)
2839 # Remaining options are determined by the block driver.
2843 { 'union': 'BlockdevOptions',
2844 'base': { 'driver': 'BlockdevDriver',
2845 '*node-name': 'str',
2846 '*discard': 'BlockdevDiscardOptions',
2847 '*cache': 'BlockdevCacheOptions',
2848 '*read-only': 'bool',
2849 '*detect-zeroes': 'BlockdevDetectZeroesOptions' },
2850 'discriminator': 'driver',
2852 'archipelago':'BlockdevOptionsArchipelago',
2853 'blkdebug': 'BlockdevOptionsBlkdebug',
2854 'blkverify': 'BlockdevOptionsBlkverify',
2855 'bochs': 'BlockdevOptionsGenericFormat',
2856 'cloop': 'BlockdevOptionsGenericFormat',
2857 'dmg': 'BlockdevOptionsGenericFormat',
2858 'file': 'BlockdevOptionsFile',
2859 'ftp': 'BlockdevOptionsCurl',
2860 'ftps': 'BlockdevOptionsCurl',
2861 'gluster': 'BlockdevOptionsGluster',
2862 'host_cdrom': 'BlockdevOptionsFile',
2863 'host_device':'BlockdevOptionsFile',
2864 'http': 'BlockdevOptionsCurl',
2865 'https': 'BlockdevOptionsCurl',
2866 'iscsi': 'BlockdevOptionsIscsi',
2867 'luks': 'BlockdevOptionsLUKS',
2868 'nbd': 'BlockdevOptionsNbd',
2869 'nfs': 'BlockdevOptionsNfs',
2870 'null-aio': 'BlockdevOptionsNull',
2871 'null-co': 'BlockdevOptionsNull',
2872 'parallels': 'BlockdevOptionsGenericFormat',
2873 'qcow2': 'BlockdevOptionsQcow2',
2874 'qcow': 'BlockdevOptionsGenericCOWFormat',
2875 'qed': 'BlockdevOptionsGenericCOWFormat',
2876 'quorum': 'BlockdevOptionsQuorum',
2877 'raw': 'BlockdevOptionsRaw',
2878 # TODO rbd: Wait for structured options
2879 'replication':'BlockdevOptionsReplication',
2880 # TODO sheepdog: Wait for structured options
2881 'ssh': 'BlockdevOptionsSsh',
2882 'vdi': 'BlockdevOptionsGenericFormat',
2883 'vhdx': 'BlockdevOptionsGenericFormat',
2884 'vmdk': 'BlockdevOptionsGenericCOWFormat',
2885 'vpc': 'BlockdevOptionsGenericFormat',
2886 'vvfat': 'BlockdevOptionsVVFAT'
2892 # Reference to a block device.
2894 # @definition: defines a new block device inline
2895 # @reference: references the ID of an existing block device. An
2896 # empty string means that no block device should be
2901 { 'alternate': 'BlockdevRef',
2902 'data': { 'definition': 'BlockdevOptions',
2903 'reference': 'str' } }
2908 # Creates a new block device. If the @id option is given at the top level, a
2909 # BlockBackend will be created; otherwise, @node-name is mandatory at the top
2910 # level and no BlockBackend will be created.
2912 # For the arguments, see the documentation of BlockdevOptions.
2914 # Note: This command is still a work in progress. It doesn't support all
2915 # block drivers among other things. Stay away from it unless you want
2916 # to help with its development.
2923 # -> { "execute": "blockdev-add",
2925 # "driver": "qcow2",
2926 # "node-name": "test1",
2929 # "filename": "test.qcow2"
2933 # <- { "return": {} }
2936 # -> { "execute": "blockdev-add",
2938 # "driver": "qcow2",
2939 # "node-name": "node0",
2940 # "discard": "unmap",
2946 # "filename": "/tmp/test.qcow2"
2952 # "filename": "/dev/fdset/4"
2958 # <- { "return": {} }
2961 { 'command': 'blockdev-add', 'data': 'BlockdevOptions', 'boxed': true }
2966 # Deletes a block device that has been added using blockdev-add.
2967 # The command will fail if the node is attached to a device or is
2968 # otherwise being used.
2970 # @node-name: Name of the graph node to delete.
2972 # Note: This command is still a work in progress and is considered
2973 # experimental. Stay away from it unless you want to help with its
2980 # -> { "execute": "blockdev-add",
2982 # "driver": "qcow2",
2983 # "node-name": "node0",
2986 # "filename": "test.qcow2"
2990 # <- { "return": {} }
2992 # -> { "execute": "x-blockdev-del",
2993 # "arguments": { "node-name": "node0" }
2995 # <- { "return": {} }
2998 { 'command': 'x-blockdev-del', 'data': { 'node-name': 'str' } }
3001 # @blockdev-open-tray:
3003 # Opens a block device's tray. If there is a block driver state tree inserted as
3004 # a medium, it will become inaccessible to the guest (but it will remain
3005 # associated to the block device, so closing the tray will make it accessible
3008 # If the tray was already open before, this will be a no-op.
3010 # Once the tray opens, a DEVICE_TRAY_MOVED event is emitted. There are cases in
3011 # which no such event will be generated, these include:
3012 # - if the guest has locked the tray, @force is false and the guest does not
3013 # respond to the eject request
3014 # - if the BlockBackend denoted by @device does not have a guest device attached
3016 # - if the guest device does not have an actual tray
3018 # @device: #optional Block device name (deprecated, use @id instead)
3020 # @id: #optional The name or QOM path of the guest device (since: 2.8)
3022 # @force: #optional if false (the default), an eject request will be sent to
3023 # the guest if it has locked the tray (and the tray will not be opened
3024 # immediately); if true, the tray will be opened regardless of whether
3031 # -> { "execute": "blockdev-open-tray",
3032 # "arguments": { "id": "ide0-1-0" } }
3034 # <- { "timestamp": { "seconds": 1418751016,
3035 # "microseconds": 716996 },
3036 # "event": "DEVICE_TRAY_MOVED",
3037 # "data": { "device": "ide1-cd0",
3039 # "tray-open": true } }
3041 # <- { "return": {} }
3044 { 'command': 'blockdev-open-tray',
3045 'data': { '*device': 'str',
3047 '*force': 'bool' } }
3050 # @blockdev-close-tray:
3052 # Closes a block device's tray. If there is a block driver state tree associated
3053 # with the block device (which is currently ejected), that tree will be loaded
3056 # If the tray was already closed before, this will be a no-op.
3058 # @device: #optional Block device name (deprecated, use @id instead)
3060 # @id: #optional The name or QOM path of the guest device (since: 2.8)
3066 # -> { "execute": "blockdev-close-tray",
3067 # "arguments": { "id": "ide0-1-0" } }
3069 # <- { "timestamp": { "seconds": 1418751345,
3070 # "microseconds": 272147 },
3071 # "event": "DEVICE_TRAY_MOVED",
3072 # "data": { "device": "ide1-cd0",
3074 # "tray-open": false } }
3076 # <- { "return": {} }
3079 { 'command': 'blockdev-close-tray',
3080 'data': { '*device': 'str',
3084 # @x-blockdev-remove-medium:
3086 # Removes a medium (a block driver state tree) from a block device. That block
3087 # device's tray must currently be open (unless there is no attached guest
3090 # If the tray is open and there is no medium inserted, this will be a no-op.
3092 # @device: #optional Block device name (deprecated, use @id instead)
3094 # @id: #optional The name or QOM path of the guest device (since: 2.8)
3096 # Note: This command is still a work in progress and is considered experimental.
3097 # Stay away from it unless you want to help with its development.
3103 # -> { "execute": "x-blockdev-remove-medium",
3104 # "arguments": { "id": "ide0-1-0" } }
3106 # <- { "error": { "class": "GenericError",
3107 # "desc": "Tray of device 'ide0-1-0' is not open" } }
3109 # -> { "execute": "blockdev-open-tray",
3110 # "arguments": { "id": "ide0-1-0" } }
3112 # <- { "timestamp": { "seconds": 1418751627,
3113 # "microseconds": 549958 },
3114 # "event": "DEVICE_TRAY_MOVED",
3115 # "data": { "device": "ide1-cd0",
3117 # "tray-open": true } }
3119 # <- { "return": {} }
3121 # -> { "execute": "x-blockdev-remove-medium",
3122 # "arguments": { "device": "ide0-1-0" } }
3124 # <- { "return": {} }
3127 { 'command': 'x-blockdev-remove-medium',
3128 'data': { '*device': 'str',
3132 # @x-blockdev-insert-medium:
3134 # Inserts a medium (a block driver state tree) into a block device. That block
3135 # device's tray must currently be open (unless there is no attached guest
3136 # device) and there must be no medium inserted already.
3138 # @device: #optional Block device name (deprecated, use @id instead)
3140 # @id: #optional The name or QOM path of the guest device (since: 2.8)
3142 # @node-name: name of a node in the block driver state graph
3144 # Note: This command is still a work in progress and is considered experimental.
3145 # Stay away from it unless you want to help with its development.
3151 # -> { "execute": "blockdev-add",
3153 # "options": { "node-name": "node0",
3155 # "file": { "driver": "file",
3156 # "filename": "fedora.iso" } } } }
3157 # <- { "return": {} }
3159 # -> { "execute": "x-blockdev-insert-medium",
3160 # "arguments": { "id": "ide0-1-0",
3161 # "node-name": "node0" } }
3163 # <- { "return": {} }
3166 { 'command': 'x-blockdev-insert-medium',
3167 'data': { '*device': 'str',
3169 'node-name': 'str'} }
3173 # @BlockdevChangeReadOnlyMode:
3175 # Specifies the new read-only mode of a block device subject to the
3176 # @blockdev-change-medium command.
3178 # @retain: Retains the current read-only mode
3180 # @read-only: Makes the device read-only
3182 # @read-write: Makes the device writable
3187 { 'enum': 'BlockdevChangeReadOnlyMode',
3188 'data': ['retain', 'read-only', 'read-write'] }
3192 # @blockdev-change-medium:
3194 # Changes the medium inserted into a block device by ejecting the current medium
3195 # and loading a new image file which is inserted as the new medium (this command
3196 # combines blockdev-open-tray, x-blockdev-remove-medium,
3197 # x-blockdev-insert-medium and blockdev-close-tray).
3199 # @device: #optional Block device name (deprecated, use @id instead)
3201 # @id: #optional The name or QOM path of the guest device
3204 # @filename: filename of the new image to be loaded
3206 # @format: #optional format to open the new image with (defaults to
3207 # the probed format)
3209 # @read-only-mode: #optional change the read-only mode of the device; defaults
3216 # 1. Change a removable medium
3218 # -> { "execute": "blockdev-change-medium",
3219 # "arguments": { "id": "ide0-1-0",
3220 # "filename": "/srv/images/Fedora-12-x86_64-DVD.iso",
3221 # "format": "raw" } }
3222 # <- { "return": {} }
3224 # 2. Load a read-only medium into a writable drive
3226 # -> { "execute": "blockdev-change-medium",
3227 # "arguments": { "id": "floppyA",
3228 # "filename": "/srv/images/ro.img",
3230 # "read-only-mode": "retain" } }
3233 # { "class": "GenericError",
3234 # "desc": "Could not open '/srv/images/ro.img': Permission denied" } }
3236 # -> { "execute": "blockdev-change-medium",
3237 # "arguments": { "id": "floppyA",
3238 # "filename": "/srv/images/ro.img",
3240 # "read-only-mode": "read-only" } }
3242 # <- { "return": {} }
3245 { 'command': 'blockdev-change-medium',
3246 'data': { '*device': 'str',
3250 '*read-only-mode': 'BlockdevChangeReadOnlyMode' } }
3254 # @BlockErrorAction:
3256 # An enumeration of action that has been taken when a DISK I/O occurs
3258 # @ignore: error has been ignored
3260 # @report: error has been reported to the device
3262 # @stop: error caused VM to be stopped
3266 { 'enum': 'BlockErrorAction',
3267 'data': [ 'ignore', 'report', 'stop' ] }
3271 # @BLOCK_IMAGE_CORRUPTED:
3273 # Emitted when a disk image is being marked corrupt. The image can be
3274 # identified by its device or node name. The 'device' field is always
3275 # present for compatibility reasons, but it can be empty ("") if the
3276 # image does not have a device name associated.
3278 # @device: device name. This is always present for compatibility
3279 # reasons, but it can be empty ("") if the image does not
3280 # have a device name associated.
3282 # @node-name: #optional node name (Since: 2.4)
3284 # @msg: informative message for human consumption, such as the kind of
3285 # corruption being detected. It should not be parsed by machine as it is
3286 # not guaranteed to be stable
3288 # @offset: #optional if the corruption resulted from an image access, this is
3289 # the host's access offset into the image
3291 # @size: #optional if the corruption resulted from an image access, this is
3294 # @fatal: if set, the image is marked corrupt and therefore unusable after this
3295 # event and must be repaired (Since 2.2; before, every
3296 # BLOCK_IMAGE_CORRUPTED event was fatal)
3298 # Note: If action is "stop", a STOP event will eventually follow the
3299 # BLOCK_IO_ERROR event.
3303 # <- { "event": "BLOCK_IMAGE_CORRUPTED",
3304 # "data": { "device": "ide0-hd0", "node-name": "node0",
3305 # "msg": "Prevented active L1 table overwrite", "offset": 196608,
3307 # "timestamp": { "seconds": 1378126126, "microseconds": 966463 } }
3311 { 'event': 'BLOCK_IMAGE_CORRUPTED',
3312 'data': { 'device' : 'str',
3313 '*node-name' : 'str',
3317 'fatal' : 'bool' } }
3322 # Emitted when a disk I/O error occurs
3324 # @device: device name. This is always present for compatibility
3325 # reasons, but it can be empty ("") if the image does not
3326 # have a device name associated.
3328 # @node-name: node name. Note that errors may be reported for the root node
3329 # that is directly attached to a guest device rather than for the
3330 # node where the error occurred. (Since: 2.8)
3332 # @operation: I/O operation
3334 # @action: action that has been taken
3336 # @nospace: #optional true if I/O error was caused due to a no-space
3337 # condition. This key is only present if query-block's
3338 # io-status is present, please see query-block documentation
3339 # for more information (since: 2.2)
3341 # @reason: human readable string describing the error cause.
3342 # (This field is a debugging aid for humans, it should not
3343 # be parsed by applications) (since: 2.2)
3345 # Note: If action is "stop", a STOP event will eventually follow the
3346 # BLOCK_IO_ERROR event
3352 # <- { "event": "BLOCK_IO_ERROR",
3353 # "data": { "device": "ide0-hd1",
3354 # "node-name": "#block212",
3355 # "operation": "write",
3356 # "action": "stop" },
3357 # "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
3360 { 'event': 'BLOCK_IO_ERROR',
3361 'data': { 'device': 'str', 'node-name': 'str', 'operation': 'IoOperationType',
3362 'action': 'BlockErrorAction', '*nospace': 'bool',
3366 # @BLOCK_JOB_COMPLETED:
3368 # Emitted when a block job has completed
3372 # @device: The job identifier. Originally the device name but other
3373 # values are allowed since QEMU 2.7
3375 # @len: maximum progress value
3377 # @offset: current progress value. On success this is equal to len.
3378 # On failure this is less than len
3380 # @speed: rate limit, bytes per second
3382 # @error: #optional error message. Only present on failure. This field
3383 # contains a human-readable error message. There are no semantics
3384 # other than that streaming has failed and clients should not try to
3385 # interpret the error string
3391 # <- { "event": "BLOCK_JOB_COMPLETED",
3392 # "data": { "type": "stream", "device": "virtio-disk0",
3393 # "len": 10737418240, "offset": 10737418240,
3395 # "timestamp": { "seconds": 1267061043, "microseconds": 959568 } }
3398 { 'event': 'BLOCK_JOB_COMPLETED',
3399 'data': { 'type' : 'BlockJobType',
3407 # @BLOCK_JOB_CANCELLED:
3409 # Emitted when a block job has been cancelled
3413 # @device: The job identifier. Originally the device name but other
3414 # values are allowed since QEMU 2.7
3416 # @len: maximum progress value
3418 # @offset: current progress value. On success this is equal to len.
3419 # On failure this is less than len
3421 # @speed: rate limit, bytes per second
3427 # <- { "event": "BLOCK_JOB_CANCELLED",
3428 # "data": { "type": "stream", "device": "virtio-disk0",
3429 # "len": 10737418240, "offset": 134217728,
3431 # "timestamp": { "seconds": 1267061043, "microseconds": 959568 } }
3434 { 'event': 'BLOCK_JOB_CANCELLED',
3435 'data': { 'type' : 'BlockJobType',
3444 # Emitted when a block job encounters an error
3446 # @device: The job identifier. Originally the device name but other
3447 # values are allowed since QEMU 2.7
3449 # @operation: I/O operation
3451 # @action: action that has been taken
3457 # <- { "event": "BLOCK_JOB_ERROR",
3458 # "data": { "device": "ide0-hd1",
3459 # "operation": "write",
3460 # "action": "stop" },
3461 # "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
3464 { 'event': 'BLOCK_JOB_ERROR',
3465 'data': { 'device' : 'str',
3466 'operation': 'IoOperationType',
3467 'action' : 'BlockErrorAction' } }
3472 # Emitted when a block job is ready to complete
3476 # @device: The job identifier. Originally the device name but other
3477 # values are allowed since QEMU 2.7
3479 # @len: maximum progress value
3481 # @offset: current progress value. On success this is equal to len.
3482 # On failure this is less than len
3484 # @speed: rate limit, bytes per second
3486 # Note: The "ready to complete" status is always reset by a @BLOCK_JOB_ERROR
3493 # <- { "event": "BLOCK_JOB_READY",
3494 # "data": { "device": "drive0", "type": "mirror", "speed": 0,
3495 # "len": 2097152, "offset": 2097152 }
3496 # "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
3499 { 'event': 'BLOCK_JOB_READY',
3500 'data': { 'type' : 'BlockJobType',
3509 # Preallocation mode of QEMU image file
3511 # @off: no preallocation
3512 # @metadata: preallocate only for metadata
3513 # @falloc: like @full preallocation but allocate disk space by
3514 # posix_fallocate() rather than writing zeros.
3515 # @full: preallocate all data by writing zeros to device to ensure disk
3516 # space is really available. @full preallocation also sets up
3517 # metadata correctly.
3521 { 'enum': 'PreallocMode',
3522 'data': [ 'off', 'metadata', 'falloc', 'full' ] }
3525 # @BLOCK_WRITE_THRESHOLD:
3527 # Emitted when writes on block device reaches or exceeds the
3528 # configured write threshold. For thin-provisioned devices, this
3529 # means the device should be extended to avoid pausing for
3531 # The event is one shot. Once triggered, it needs to be
3532 # re-registered with another block-set-threshold command.
3534 # @node-name: graph node name on which the threshold was exceeded.
3536 # @amount-exceeded: amount of data which exceeded the threshold, in bytes.
3538 # @write-threshold: last configured threshold, in bytes.
3542 { 'event': 'BLOCK_WRITE_THRESHOLD',
3543 'data': { 'node-name': 'str',
3544 'amount-exceeded': 'uint64',
3545 'write-threshold': 'uint64' } }
3548 # @block-set-write-threshold:
3550 # Change the write threshold for a block drive. An event will be
3551 # delivered if a write to this block drive crosses the configured
3552 # threshold. The threshold is an offset, thus must be
3553 # non-negative. Default is no write threshold. Setting the threshold
3554 # to zero disables it.
3556 # This is useful to transparently resize thin-provisioned drives without
3557 # the guest OS noticing.
3559 # @node-name: graph node name on which the threshold must be set.
3561 # @write-threshold: configured threshold for the block device, bytes.
3562 # Use 0 to disable the threshold.
3568 # -> { "execute": "block-set-write-threshold",
3569 # "arguments": { "node-name": "mydev",
3570 # "write-threshold": 17179869184 } }
3571 # <- { "return": {} }
3574 { 'command': 'block-set-write-threshold',
3575 'data': { 'node-name': 'str', 'write-threshold': 'uint64' } }
3578 # @x-blockdev-change:
3580 # Dynamically reconfigure the block driver state graph. It can be used
3581 # to add, remove, insert or replace a graph node. Currently only the
3582 # Quorum driver implements this feature to add or remove its child. This
3583 # is useful to fix a broken quorum child.
3585 # If @node is specified, it will be inserted under @parent. @child
3586 # may not be specified in this case. If both @parent and @child are
3587 # specified but @node is not, @child will be detached from @parent.
3589 # @parent: the id or name of the parent node.
3591 # @child: #optional the name of a child under the given parent node.
3593 # @node: #optional the name of the node that will be added.
3595 # Note: this command is experimental, and its API is not stable. It
3596 # does not support all kinds of operations, all kinds of children, nor
3597 # all block drivers.
3599 # Warning: The data in a new quorum child MUST be consistent with that of
3600 # the rest of the array.
3606 # 1. Add a new node to a quorum
3607 # -> { "execute": "blockdev-add",
3609 # "options": { "driver": "raw",
3610 # "node-name": "new_node",
3611 # "file": { "driver": "file",
3612 # "filename": "test.raw" } } } }
3613 # <- { "return": {} }
3614 # -> { "execute": "x-blockdev-change",
3615 # "arguments": { "parent": "disk1",
3616 # "node": "new_node" } }
3617 # <- { "return": {} }
3619 # 2. Delete a quorum's node
3620 # -> { "execute": "x-blockdev-change",
3621 # "arguments": { "parent": "disk1",
3622 # "child": "children.1" } }
3623 # <- { "return": {} }
3626 { 'command': 'x-blockdev-change',
3627 'data' : { 'parent': 'str',