mirror of https://gitee.com/openkylin/qemu.git
259 lines
7.1 KiB
Python
259 lines
7.1 KiB
Python
# -*- Mode: Python -*-
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##
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# == Background jobs
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##
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##
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# @JobType:
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#
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# Type of a background job.
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#
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# @commit: block commit job type, see "block-commit"
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#
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# @stream: block stream job type, see "block-stream"
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#
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# @mirror: drive mirror job type, see "drive-mirror"
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#
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# @backup: drive backup job type, see "drive-backup"
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#
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# @create: image creation job type, see "blockdev-create" (since 3.0)
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#
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# @amend: image options amend job type, see "x-blockdev-amend" (since 5.1)
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#
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# Since: 1.7
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##
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{ 'enum': 'JobType',
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'data': ['commit', 'stream', 'mirror', 'backup', 'create', 'amend'] }
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##
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# @JobStatus:
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#
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# Indicates the present state of a given job in its lifetime.
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#
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# @undefined: Erroneous, default state. Should not ever be visible.
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#
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# @created: The job has been created, but not yet started.
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#
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# @running: The job is currently running.
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#
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# @paused: The job is running, but paused. The pause may be requested by
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# either the QMP user or by internal processes.
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#
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# @ready: The job is running, but is ready for the user to signal completion.
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# This is used for long-running jobs like mirror that are designed to
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# run indefinitely.
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#
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# @standby: The job is ready, but paused. This is nearly identical to @paused.
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# The job may return to @ready or otherwise be canceled.
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#
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# @waiting: The job is waiting for other jobs in the transaction to converge
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# to the waiting state. This status will likely not be visible for
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# the last job in a transaction.
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#
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# @pending: The job has finished its work, but has finalization steps that it
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# needs to make prior to completing. These changes will require
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# manual intervention via @job-finalize if auto-finalize was set to
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# false. These pending changes may still fail.
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#
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# @aborting: The job is in the process of being aborted, and will finish with
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# an error. The job will afterwards report that it is @concluded.
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# This status may not be visible to the management process.
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#
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# @concluded: The job has finished all work. If auto-dismiss was set to false,
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# the job will remain in the query list until it is dismissed via
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# @job-dismiss.
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#
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# @null: The job is in the process of being dismantled. This state should not
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# ever be visible externally.
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#
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# Since: 2.12
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##
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{ 'enum': 'JobStatus',
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'data': ['undefined', 'created', 'running', 'paused', 'ready', 'standby',
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'waiting', 'pending', 'aborting', 'concluded', 'null' ] }
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##
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# @JobVerb:
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#
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# Represents command verbs that can be applied to a job.
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#
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# @cancel: see @job-cancel
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#
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# @pause: see @job-pause
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#
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# @resume: see @job-resume
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#
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# @set-speed: see @block-job-set-speed
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#
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# @complete: see @job-complete
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#
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# @dismiss: see @job-dismiss
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#
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# @finalize: see @job-finalize
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#
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# Since: 2.12
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##
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{ 'enum': 'JobVerb',
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'data': ['cancel', 'pause', 'resume', 'set-speed', 'complete', 'dismiss',
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'finalize' ] }
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##
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# @JOB_STATUS_CHANGE:
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#
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# Emitted when a job transitions to a different status.
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#
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# @id: The job identifier
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# @status: The new job status
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#
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# Since: 3.0
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##
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{ 'event': 'JOB_STATUS_CHANGE',
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'data': { 'id': 'str',
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'status': 'JobStatus' } }
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##
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# @job-pause:
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#
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# Pause an active job.
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#
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# This command returns immediately after marking the active job for pausing.
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# Pausing an already paused job is an error.
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#
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# The job will pause as soon as possible, which means transitioning into the
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# PAUSED state if it was RUNNING, or into STANDBY if it was READY. The
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# corresponding JOB_STATUS_CHANGE event will be emitted.
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#
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# Cancelling a paused job automatically resumes it.
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#
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# @id: The job identifier.
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#
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# Since: 3.0
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##
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{ 'command': 'job-pause', 'data': { 'id': 'str' } }
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##
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# @job-resume:
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#
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# Resume a paused job.
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#
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# This command returns immediately after resuming a paused job. Resuming an
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# already running job is an error.
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#
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# @id : The job identifier.
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#
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# Since: 3.0
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##
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{ 'command': 'job-resume', 'data': { 'id': 'str' } }
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##
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# @job-cancel:
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#
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# Instruct an active background job to cancel at the next opportunity.
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# This command returns immediately after marking the active job for
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# cancellation.
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#
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# The job will cancel as soon as possible and then emit a JOB_STATUS_CHANGE
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# event. Usually, the status will change to ABORTING, but it is possible that
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# a job successfully completes (e.g. because it was almost done and there was
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# no opportunity to cancel earlier than completing the job) and transitions to
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# PENDING instead.
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#
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# @id: The job identifier.
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#
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# Since: 3.0
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##
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{ 'command': 'job-cancel', 'data': { 'id': 'str' } }
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##
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# @job-complete:
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#
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# Manually trigger completion of an active job in the READY state.
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#
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# @id: The job identifier.
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#
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# Since: 3.0
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##
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{ 'command': 'job-complete', 'data': { 'id': 'str' } }
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##
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# @job-dismiss:
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#
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# Deletes a job that is in the CONCLUDED state. This command only needs to be
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# run explicitly for jobs that don't have automatic dismiss enabled.
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#
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# This command will refuse to operate on any job that has not yet reached its
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# terminal state, JOB_STATUS_CONCLUDED. For jobs that make use of JOB_READY
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# event, job-cancel or job-complete will still need to be used as appropriate.
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#
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# @id: The job identifier.
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#
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# Since: 3.0
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##
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{ 'command': 'job-dismiss', 'data': { 'id': 'str' } }
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##
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# @job-finalize:
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#
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# Instructs all jobs in a transaction (or a single job if it is not part of any
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# transaction) to finalize any graph changes and do any necessary cleanup. This
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# command requires that all involved jobs are in the PENDING state.
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#
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# For jobs in a transaction, instructing one job to finalize will force
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# ALL jobs in the transaction to finalize, so it is only necessary to instruct
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# a single member job to finalize.
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#
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# @id: The identifier of any job in the transaction, or of a job that is not
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# part of any transaction.
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#
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# Since: 3.0
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##
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{ 'command': 'job-finalize', 'data': { 'id': 'str' } }
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##
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# @JobInfo:
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#
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# Information about a job.
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#
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# @id: The job identifier
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#
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# @type: The kind of job that is being performed
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#
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# @status: Current job state/status
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#
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# @current-progress: Progress made until now. The unit is arbitrary and the
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# value can only meaningfully be used for the ratio of
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# @current-progress to @total-progress. The value is
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# monotonically increasing.
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#
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# @total-progress: Estimated @current-progress value at the completion of
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# the job. This value can arbitrarily change while the
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# job is running, in both directions.
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#
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# @error: If this field is present, the job failed; if it is
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# still missing in the CONCLUDED state, this indicates
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# successful completion.
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#
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# The value is a human-readable error message to describe
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# the reason for the job failure. It should not be parsed
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# by applications.
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#
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# Since: 3.0
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##
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{ 'struct': 'JobInfo',
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'data': { 'id': 'str', 'type': 'JobType', 'status': 'JobStatus',
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'current-progress': 'int', 'total-progress': 'int',
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'*error': 'str' } }
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##
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# @query-jobs:
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#
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# Return information about jobs.
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#
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# Returns: a list with a @JobInfo for each active job
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#
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# Since: 3.0
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##
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{ 'command': 'query-jobs', 'returns': ['JobInfo'] }
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