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Re: [Qemu-devel] [PATCH v5 06/11] block: add drive-backup QMP command
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [PATCH v5 06/11] block: add drive-backup QMP command |
Date: |
Thu, 20 Jun 2013 14:19:03 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Wed, Jun 19, 2013 at 01:07:42PM +0200, Kevin Wolf wrote:
> Am 30.05.2013 um 14:34 hat Stefan Hajnoczi geschrieben:
> > @drive-backup
> >
> > Start a point-in-time copy of a block device to a new destination. The
> > status of ongoing drive-backup operations can be checked with
> > query-block-jobs where the BlockJobInfo.type field has the value 'backup'.
> > The operation can be stopped before it has completed using the
> > block-job-cancel command.
> >
> > @device: the name of the device which should be copied.
> >
> > @target: the target of the new image. If the file exists, or if it
> > is a device, the existing file/device will be used as the new
> > destination. If it does not exist, a new file will be created.
> >
> > @format: #optional the format of the new destination, default is to
> > probe if @mode is 'existing', else the format of the source
> >
> > @mode: #optional whether and how QEMU should create a new image, default is
> > 'absolute-paths'.
> >
> > @speed: #optional the maximum speed, in bytes per second
> >
> > @on-source-error: #optional the action to take on an error on the source,
> > default 'report'. 'stop' and 'enospc' can only be used
> > if the block device supports io-status (see BlockInfo).
> >
> > @on-target-error: #optional the action to take on an error on the target,
> > default 'report' (no limitations, since this applies to
> > a different block device than @device).
> >
> > Note that @on-source-error and @on-target-error only affect background I/O.
> > If an error occurs during a guest write request, the device's rerror/werror
> > actions will be used.
> >
> > Returns: nothing on success
> > If @device is not a valid block device, DeviceNotFound
> >
> > Since 1.6
> >
> > Signed-off-by: Stefan Hajnoczi <address@hidden>
>
> Reviewed-by: Kevin Wolf <address@hidden>
>
> But what about HMP, the series doesn't seem to have a separate patch to
> add a command there?
I can send it as a follow-up if you want. The test cases use QMP and so
do management tools - I didn't feel the need for HMP.
Stefan