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block: Accept node-name for drive-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
drive-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: Alberto Garcia <berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Kevin Wolf 2016-06-23 14:20:24 +02:00
parent 7b5dca3f02
commit b7e4fa2242
4 changed files with 14 additions and 35 deletions
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4
qapi/block-core.json
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@ -876,7 +876,7 @@
# @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 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
@ -1087,7 +1087,7 @@
# For the arguments, see the documentation of DriveBackup.
#
# Returns: nothing on success
# If @device is not a valid block device, DeviceNotFound
# If @device is not a valid block device, GenericError
#
# Since 1.6
##