8 { 'include': 'block.json' }
13 # This action can be used to test transaction failure.
21 # @ActionCompletionMode:
23 # An enumeration of Transactional completion modes.
25 # @individual: Do not attempt to cancel any other Actions if any Actions fail
26 # after the Transaction request succeeds. All Actions that
27 # can complete successfully will do so without waiting on others.
28 # This is the default.
30 # @grouped: If any Action fails after the Transaction succeeds, cancel all
31 # Actions. Actions do not complete until all Actions are ready to
32 # complete. May be rejected by Actions that do not support this
37 { 'enum': 'ActionCompletionMode',
38 'data': [ 'individual', 'grouped' ] }
43 # A discriminated record of operations that can be performed with
44 # @transaction. Action @type can be:
47 # - @block-dirty-bitmap-add: since 2.5
48 # - @block-dirty-bitmap-clear: since 2.5
49 # - @blockdev-backup: since 2.3
50 # - @blockdev-snapshot: since 2.5
51 # - @blockdev-snapshot-internal-sync: since 1.7
52 # - @blockdev-snapshot-sync: since 1.1
53 # - @drive-backup: since 1.6
57 { 'union': 'TransactionAction',
60 'block-dirty-bitmap-add': 'BlockDirtyBitmapAdd',
61 'block-dirty-bitmap-clear': 'BlockDirtyBitmap',
62 'blockdev-backup': 'BlockdevBackup',
63 'blockdev-snapshot': 'BlockdevSnapshot',
64 'blockdev-snapshot-internal-sync': 'BlockdevSnapshotInternal',
65 'blockdev-snapshot-sync': 'BlockdevSnapshotSync',
66 'drive-backup': 'DriveBackup'
70 # @TransactionProperties:
72 # Optional arguments to modify the behavior of a Transaction.
74 # @completion-mode: Controls how jobs launched asynchronously by
75 # Actions will complete or fail as a group.
76 # See @ActionCompletionMode for details.
80 { 'struct': 'TransactionProperties',
82 '*completion-mode': 'ActionCompletionMode'
89 # Executes a number of transactionable QMP commands atomically. If any
90 # operation fails, then the entire set of actions will be abandoned and the
91 # appropriate error returned.
93 # For external snapshots, the dictionary contains the device, the file to use for
94 # the new snapshot, and the format. The default format, if not specified, is
97 # Each new snapshot defaults to being created by QEMU (wiping any
98 # contents if the file already exists), but it is also possible to reuse
99 # an externally-created file. In the latter case, you should ensure that
100 # the new image file has the same contents as the current one; QEMU cannot
101 # perform any meaningful check. Typically this is achieved by using the
102 # current image file as the backing file for the new image.
104 # On failure, the original disks pre-snapshot attempt will be used.
106 # For internal snapshots, the dictionary contains the device and the snapshot's
107 # name. If an internal snapshot matching name already exists, the request will
108 # be rejected. Only some image formats support it, for example, qcow2, rbd,
111 # On failure, qemu will try delete the newly created internal snapshot in the
112 # transaction. When an I/O error occurs during deletion, the user needs to fix
113 # it later with qemu-img or other command.
115 # @actions: List of @TransactionAction;
116 # information needed for the respective operations.
118 # @properties: structure of additional options to control the
119 # execution of the transaction. See @TransactionProperties
120 # for additional detail.
122 # Returns: nothing on success
124 # Errors depend on the operations of the transaction
126 # Note: The transaction aborts on the first failure. Therefore, there will be
127 # information on only one failed operation returned in an error condition, and
128 # subsequent actions will not have been attempted.
134 # -> { "execute": "transaction",
135 # "arguments": { "actions": [
136 # { "type": "blockdev-snapshot-sync", "data" : { "device": "ide-hd0",
137 # "snapshot-file": "/some/place/my-image",
138 # "format": "qcow2" } },
139 # { "type": "blockdev-snapshot-sync", "data" : { "node-name": "myfile",
140 # "snapshot-file": "/some/place/my-image2",
141 # "snapshot-node-name": "node3432",
142 # "mode": "existing",
143 # "format": "qcow2" } },
144 # { "type": "blockdev-snapshot-sync", "data" : { "device": "ide-hd1",
145 # "snapshot-file": "/some/place/my-image2",
146 # "mode": "existing",
147 # "format": "qcow2" } },
148 # { "type": "blockdev-snapshot-internal-sync", "data" : {
149 # "device": "ide-hd2",
150 # "name": "snapshot0" } } ] } }
151 # <- { "return": {} }
154 { 'command': 'transaction',
155 'data': { 'actions': [ 'TransactionAction' ],
156 '*properties': 'TransactionProperties'