mirror of
https://gitlab.com/qemu-project/qemu
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26ec4e53f2
The current doc generation doesn't care much about indentation levels,
but we would like to switch to an rST format, and rST does care about
indentation.
Make the doc comments more strongly consistent about indentation
for multiline constructs like:
@arg: description line 1
description line 2
Returns: line one
line 2
so that there is always exactly one space after the colon, and
subsequent lines align with the first.
This commit is a purely whitespace change, and it does not alter the
generated .texi files (because the texi generation code strips away
all the extra whitespace). This does mean that we end up with some
over-length lines.
Note that when the documentation for an argument fits on a single
line like this:
@arg: one line only
then stray extra spaces after the ':' don't affect the rST output, so
I have not attempted to methodically fix them, though the preference
is a single space here too.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20200213175647.17628-10-peter.maydell@linaro.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Commit message tweaked]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
166 lines
5.7 KiB
Python
166 lines
5.7 KiB
Python
# -*- Mode: Python -*-
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#
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##
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# = Transactions
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##
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{ 'include': 'block.json' }
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##
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# @Abort:
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#
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# This action can be used to test transaction failure.
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#
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# Since: 1.6
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##
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{ 'struct': 'Abort',
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'data': { } }
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##
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# @ActionCompletionMode:
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#
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# An enumeration of Transactional completion modes.
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#
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# @individual: Do not attempt to cancel any other Actions if any Actions fail
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# after the Transaction request succeeds. All Actions that
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# can complete successfully will do so without waiting on others.
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# This is the default.
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#
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# @grouped: If any Action fails after the Transaction succeeds, cancel all
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# Actions. Actions do not complete until all Actions are ready to
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# complete. May be rejected by Actions that do not support this
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# completion mode.
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#
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# Since: 2.5
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##
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{ 'enum': 'ActionCompletionMode',
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'data': [ 'individual', 'grouped' ] }
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##
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# @TransactionAction:
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#
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# A discriminated record of operations that can be performed with
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# @transaction. Action @type can be:
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#
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# - @abort: since 1.6
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# - @block-dirty-bitmap-add: since 2.5
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# - @block-dirty-bitmap-remove: since 4.2
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# - @block-dirty-bitmap-clear: since 2.5
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# - @block-dirty-bitmap-enable: since 4.0
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# - @block-dirty-bitmap-disable: since 4.0
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# - @block-dirty-bitmap-merge: since 4.0
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# - @blockdev-backup: since 2.3
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# - @blockdev-snapshot: since 2.5
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# - @blockdev-snapshot-internal-sync: since 1.7
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# - @blockdev-snapshot-sync: since 1.1
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# - @drive-backup: since 1.6
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#
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# Since: 1.1
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##
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{ 'union': 'TransactionAction',
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'data': {
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'abort': 'Abort',
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'block-dirty-bitmap-add': 'BlockDirtyBitmapAdd',
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'block-dirty-bitmap-remove': 'BlockDirtyBitmap',
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'block-dirty-bitmap-clear': 'BlockDirtyBitmap',
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'block-dirty-bitmap-enable': 'BlockDirtyBitmap',
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'block-dirty-bitmap-disable': 'BlockDirtyBitmap',
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'block-dirty-bitmap-merge': 'BlockDirtyBitmapMerge',
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'blockdev-backup': 'BlockdevBackup',
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'blockdev-snapshot': 'BlockdevSnapshot',
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'blockdev-snapshot-internal-sync': 'BlockdevSnapshotInternal',
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'blockdev-snapshot-sync': 'BlockdevSnapshotSync',
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'drive-backup': 'DriveBackup'
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} }
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##
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# @TransactionProperties:
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#
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# Optional arguments to modify the behavior of a Transaction.
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#
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# @completion-mode: Controls how jobs launched asynchronously by
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# Actions will complete or fail as a group.
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# See @ActionCompletionMode for details.
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#
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# Since: 2.5
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##
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{ 'struct': 'TransactionProperties',
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'data': {
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'*completion-mode': 'ActionCompletionMode'
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}
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}
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##
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# @transaction:
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#
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# Executes a number of transactionable QMP commands atomically. If any
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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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# @properties: structure of additional options to control the
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# execution of the transaction. See @TransactionProperties
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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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# information on only one failed operation returned in an error condition, and
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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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'*properties': 'TransactionProperties'
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}
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}
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