4 # = QAPI block definitions
7 # QAPI block core definitions
8 { 'include': 'block-core.json' }
11 # == QAPI block definitions (vm unrelated)
15 # @BiosAtaTranslation:
17 # Policy that BIOS should use to interpret cylinder/head/sector
18 # addresses. Note that Bochs BIOS and SeaBIOS will not actually
19 # translate logical CHS to physical; instead, they will use logical
22 # @auto: If cylinder/heads/sizes are passed, choose between none and LBA
23 # depending on the size of the disk. If they are not passed,
24 # choose none if QEMU can guess that the disk had 16 or fewer
25 # heads, large if QEMU can guess that the disk had 131072 or
26 # fewer tracks across all heads (i.e. cylinders*heads<131072),
29 # @none: The physical disk geometry is equal to the logical geometry.
31 # @lba: Assume 63 sectors per track and one of 16, 32, 64, 128 or 255
32 # heads (if fewer than 255 are enough to cover the whole disk
33 # with 1024 cylinders/head). The number of cylinders/head is
34 # then computed based on the number of sectors and heads.
36 # @large: The number of cylinders per head is scaled down to 1024
37 # by correspondingly scaling up the number of heads.
39 # @rechs: Same as @large, but first convert a 16-head geometry to
40 # 15-head, by proportionally scaling up the number of
45 { 'enum': 'BiosAtaTranslation',
46 'data': ['auto', 'none', 'lba', 'large', 'rechs']}
51 # Type of Floppy drive to be emulated by the Floppy Disk Controller.
53 # @144: 1.44MB 3.5" drive
54 # @288: 2.88MB 3.5" drive
55 # @120: 1.2MB 5.25" drive
56 # @none: No drive connected
57 # @auto: Automatically determined by inserted media at boot
61 { 'enum': 'FloppyDriveType',
62 'data': ['144', '288', '120', 'none', 'auto']}
65 # @BlockdevSnapshotInternal:
67 # @device: the device name or node-name of a root node to generate the snapshot
70 # @name: the name of the internal snapshot to be created
72 # Notes: In transaction, if @name is empty, or any snapshot matching @name
73 # exists, the operation will fail. Only some image formats support it,
74 # for example, qcow2, rbd, and sheepdog.
78 { 'struct': 'BlockdevSnapshotInternal',
79 'data': { 'device': 'str', 'name': 'str' } }
82 # @blockdev-snapshot-internal-sync:
84 # Synchronously take an internal snapshot of a block device, when the
85 # format of the image used supports it. If the name is an empty
86 # string, or a snapshot with name already exists, the operation will
89 # For the arguments, see the documentation of BlockdevSnapshotInternal.
91 # Returns: nothing on success
93 # If @device is not a valid block device, GenericError
95 # If any snapshot matching @name exists, or @name is empty,
98 # If the format of the image used does not support it,
99 # BlockFormatFeatureNotSupported
105 # -> { "execute": "blockdev-snapshot-internal-sync",
106 # "arguments": { "device": "ide-hd0",
107 # "name": "snapshot0" }
109 # <- { "return": {} }
112 { 'command': 'blockdev-snapshot-internal-sync',
113 'data': 'BlockdevSnapshotInternal' }
116 # @blockdev-snapshot-delete-internal-sync:
118 # Synchronously delete an internal snapshot of a block device, when the format
119 # of the image used support it. The snapshot is identified by name or id or
120 # both. One of the name or id is required. Return SnapshotInfo for the
121 # successfully deleted snapshot.
123 # @device: the device name or node-name of a root node to delete the snapshot
126 # @id: optional the snapshot's ID to be deleted
128 # @name: optional the snapshot's name to be deleted
130 # Returns: SnapshotInfo on success
131 # If @device is not a valid block device, GenericError
132 # If snapshot not found, GenericError
133 # If the format of the image used does not support it,
134 # BlockFormatFeatureNotSupported
135 # If @id and @name are both not specified, GenericError
141 # -> { "execute": "blockdev-snapshot-delete-internal-sync",
142 # "arguments": { "device": "ide-hd0",
143 # "name": "snapshot0" }
147 # "name": "snapshot0",
148 # "vm-state-size": 0,
149 # "date-sec": 1000012,
151 # "vm-clock-sec": 100,
152 # "vm-clock-nsec": 20
157 { 'command': 'blockdev-snapshot-delete-internal-sync',
158 'data': { 'device': 'str', '*id': 'str', '*name': 'str'},
159 'returns': 'SnapshotInfo' }
164 # Ejects a device from a removable drive.
166 # @device: Block device name (deprecated, use @id instead)
168 # @id: The name or QOM path of the guest device (since: 2.8)
170 # @force: If true, eject regardless of whether the drive is locked.
171 # If not specified, the default value is false.
173 # Returns: Nothing on success
175 # If @device is not a valid block device, DeviceNotFound
177 # Notes: Ejecting a device with no media results in success
183 # -> { "execute": "eject", "arguments": { "id": "ide1-0-1" } }
184 # <- { "return": {} }
186 { 'command': 'eject',
187 'data': { '*device': 'str',
194 # Start an NBD server listening on the given host and port. Block
195 # devices can then be exported using @nbd-server-add. The NBD
196 # server will present them as named exports; for example, another
197 # QEMU instance could refer to them as "nbd:HOST:PORT:exportname=NAME".
199 # @addr: Address on which to listen.
200 # @tls-creds: (optional) ID of the TLS credentials object. Since 2.6
202 # Returns: error if the server is already running.
206 { 'command': 'nbd-server-start',
207 'data': { 'addr': 'SocketAddressLegacy',
208 '*tls-creds': 'str'} }
213 # Export a block node to QEMU's embedded NBD server.
215 # @device: The device name or node name of the node to be exported
217 # @writable: Whether clients should be able to write to the device via the
218 # NBD connection (default false).
220 # Returns: error if the device is already marked for export.
224 { 'command': 'nbd-server-add', 'data': {'device': 'str', '*writable': 'bool'} }
229 # Stop QEMU's embedded NBD server, and unregister all devices previously
230 # added via @nbd-server-add.
234 { 'command': 'nbd-server-stop' }
237 # @DEVICE_TRAY_MOVED:
239 # Emitted whenever the tray of a removable device is moved by the guest or by
242 # @device: Block device name. This is always present for compatibility
243 # reasons, but it can be empty ("") if the image does not
244 # have a device name associated.
246 # @id: The name or QOM path of the guest device (since 2.8)
248 # @tray-open: true if the tray has been opened or false if it has been closed
254 # <- { "event": "DEVICE_TRAY_MOVED",
255 # "data": { "device": "ide1-cd0",
256 # "id": "/machine/unattached/device[22]",
259 # "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
262 { 'event': 'DEVICE_TRAY_MOVED',
263 'data': { 'device': 'str', 'id': 'str', 'tray-open': 'bool' } }
268 # An enumeration of the quorum operation types
270 # @read: read operation
272 # @write: write operation
274 # @flush: flush operation
278 { 'enum': 'QuorumOpType',
279 'data': [ 'read', 'write', 'flush' ] }