tree 7710cbe1e5eaeaf6b35fbd43222fd63eb34ec80c
parent c09ba36c9ab62e3043041e429205f57ffbe3ba8b
author Max Reitz <mreitz@redhat.com> 1445270007 +0200
committer Kevin Wolf <kwolf@redhat.com> 1445617103 +0200

block: Prepare remaining BB functions for NULL BDS

There are several BlockBackend functions which, in theory, cannot fail.
This patch makes them cope with the BlockDriverState pointer being NULL
by making them fall back to some default action like ignoring the value
in setters and returning the default in getters.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>