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block: Accept node-name for blockdev-backup

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In order to remove the necessity to use BlockBackend names in the
external API, we want to allow node-names everywhere. This converts
blockdev-backup and the corresponding transaction action to accept a
node-name without lifting the restriction that we're operating at a root
node.

In case of an invalid device name, the command returns the GenericError
error class now instead of DeviceNotFound, because this is what
qmp_get_root_bs() returns.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Kevin Wolf 2016-06-23 14:20:24 +02:00
parent 1d13b167fd
commit cef34eebf3
3 changed files with 10 additions and 25 deletions
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2
qapi/block-core.json
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@ -925,7 +925,7 @@
# @job-id: #optional identifier for the newly-created block job. If
# omitted, the device name will be used. (Since 2.7)
#
# @device: the name of the device which should be copied.
# @device: the device name or node-name of a root node which should be copied.
#
# @target: the device name or node-name of the backup target node.
#