block: Accept node-name for change-backing-file
commit7b5dca3f0215ec6484473631928a36c3eb8da0ef
authorKevin Wolf <kwolf@redhat.com>
Thu, 23 Jun 2016 12:20:24 +0000 (23 14:20 +0200)
committerKevin Wolf <kwolf@redhat.com>
Mon, 5 Sep 2016 17:06:47 +0000 (5 19:06 +0200)
tree8e0e307a4e3c5abc2c9cdd85837994ae9553c47c
parent75dfd402a734e8080fa77a1bcf60ecc46e0e6158
block: Accept node-name for change-backing-file

In order to remove the necessity to use BlockBackend names in the
external API, we want to allow node-names everywhere. This converts
change-backing-file 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>
blockdev.c
qapi/block-core.json
qmp-commands.hx