mirror of https://github.com/xemu-project/xemu.git
qmp-commands: move 'transaction' doc to schema
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Marc-André Lureau
Markus Armbruster
parent
7b338db7ef
commit
5c82b0f198
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@ -699,92 +699,6 @@ Example:
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"target": "tgt-id" } }
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<- { "return": {} }
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transaction
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-----------
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Atomically operate on one or more block devices. Operations that are
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currently supported:
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- drive-backup
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- blockdev-backup
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- blockdev-snapshot-sync
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- blockdev-snapshot-internal-sync
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- abort
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- block-dirty-bitmap-add
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- block-dirty-bitmap-clear
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Refer to the qemu/qapi-schema.json file for minimum required QEMU
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versions for these operations. A list of dictionaries is accepted,
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that contains the actions to be performed. If there is any failure
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performing any of the operations, all operations for the group are
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abandoned.
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For external snapshots, the dictionary contains the device, the file to use for
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the new snapshot, and the format. The default format, if not specified, is
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qcow2.
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Each new snapshot defaults to being created by QEMU (wiping any
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contents if the file already exists), but it is also possible to reuse
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an externally-created file. In the latter case, you should ensure that
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the new image file has the same contents as the current one; QEMU cannot
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perform any meaningful check. Typically this is achieved by using the
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current image file as the backing file for the new image.
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On failure, the original disks pre-snapshot attempt will be used.
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For internal snapshots, the dictionary contains the device and the snapshot's
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name. If an internal snapshot matching name already exists, the request will
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be rejected. Only some image formats support it, for example, qcow2, rbd,
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and sheepdog.
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On failure, qemu will try delete the newly created internal snapshot in the
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transaction. When an I/O error occurs during deletion, the user needs to fix
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it later with qemu-img or other command.
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Arguments:
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actions array:
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- "type": the operation to perform (json-string). Possible
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values: "drive-backup", "blockdev-backup",
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"blockdev-snapshot-sync",
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"blockdev-snapshot-internal-sync",
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"abort", "block-dirty-bitmap-add",
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"block-dirty-bitmap-clear"
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- "data": a dictionary. The contents depend on the value
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of "type". When "type" is "blockdev-snapshot-sync":
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- "device": device name to snapshot (json-string)
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- "node-name": graph node name to snapshot (json-string)
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- "snapshot-file": name of new image file (json-string)
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- "snapshot-node-name": graph node name of the new snapshot (json-string)
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- "format": format of new image (json-string, optional)
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- "mode": whether and how QEMU should create the snapshot file
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(NewImageMode, optional, default "absolute-paths")
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When "type" is "blockdev-snapshot-internal-sync":
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- "device": the device name or node-name of a root node to snapshot
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(json-string)
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- "name": name of the new snapshot (json-string)
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Example:
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-> { "execute": "transaction",
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"arguments": { "actions": [
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{ "type": "blockdev-snapshot-sync", "data" : { "device": "ide-hd0",
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"snapshot-file": "/some/place/my-image",
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"format": "qcow2" } },
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{ "type": "blockdev-snapshot-sync", "data" : { "node-name": "myfile",
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"snapshot-file": "/some/place/my-image2",
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"snapshot-node-name": "node3432",
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"mode": "existing",
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"format": "qcow2" } },
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{ "type": "blockdev-snapshot-sync", "data" : { "device": "ide-hd1",
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"snapshot-file": "/some/place/my-image2",
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"mode": "existing",
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"format": "qcow2" } },
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{ "type": "blockdev-snapshot-internal-sync", "data" : {
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"device": "ide-hd2",
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"name": "snapshot0" } } ] } }
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<- { "return": {} }
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block-dirty-bitmap-add
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----------------------
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Since 2.4
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@ -2471,6 +2471,28 @@
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# operation fails, then the entire set of actions will be abandoned and the
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# appropriate error returned.
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#
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# For external snapshots, the dictionary contains the device, the file to use for
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# the new snapshot, and the format. The default format, if not specified, is
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# qcow2.
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#
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# Each new snapshot defaults to being created by QEMU (wiping any
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# contents if the file already exists), but it is also possible to reuse
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# an externally-created file. In the latter case, you should ensure that
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# the new image file has the same contents as the current one; QEMU cannot
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# perform any meaningful check. Typically this is achieved by using the
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# current image file as the backing file for the new image.
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#
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# On failure, the original disks pre-snapshot attempt will be used.
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#
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# For internal snapshots, the dictionary contains the device and the snapshot's
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# name. If an internal snapshot matching name already exists, the request will
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# be rejected. Only some image formats support it, for example, qcow2, rbd,
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# and sheepdog.
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#
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# On failure, qemu will try delete the newly created internal snapshot in the
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# transaction. When an I/O error occurs during deletion, the user needs to fix
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# it later with qemu-img or other command.
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#
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# @actions: List of @TransactionAction;
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# information needed for the respective operations.
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#
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@ -2479,6 +2501,7 @@
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# for additional detail.
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#
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# Returns: nothing on success
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#
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# Errors depend on the operations of the transaction
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#
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# Note: The transaction aborts on the first failure. Therefore, there will be
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@ -2486,6 +2509,28 @@
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# subsequent actions will not have been attempted.
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#
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# Since: 1.1
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#
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# Example:
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#
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# -> { "execute": "transaction",
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# "arguments": { "actions": [
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# { "type": "blockdev-snapshot-sync", "data" : { "device": "ide-hd0",
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# "snapshot-file": "/some/place/my-image",
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# "format": "qcow2" } },
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# { "type": "blockdev-snapshot-sync", "data" : { "node-name": "myfile",
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# "snapshot-file": "/some/place/my-image2",
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# "snapshot-node-name": "node3432",
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# "mode": "existing",
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# "format": "qcow2" } },
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# { "type": "blockdev-snapshot-sync", "data" : { "device": "ide-hd1",
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# "snapshot-file": "/some/place/my-image2",
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# "mode": "existing",
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# "format": "qcow2" } },
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# { "type": "blockdev-snapshot-internal-sync", "data" : {
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# "device": "ide-hd2",
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# "name": "snapshot0" } } ] } }
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# <- { "return": {} }
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#
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##
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{ 'command': 'transaction',
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'data': { 'actions': [ 'TransactionAction' ],
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