tree 50e6db43a35ff0a60dd39dda32e9d2a594502bb8
parent f1388ec4a144f40348321a0915c5535d623e165c
author Michal Kubecek <mkubecek@suse.cz> 1584292673 +0100
committer David S. Miller <davem@davemloft.net> 1584349464 -0700

ethtool: reject unrecognized request flags

As pointed out by Jakub Kicinski, we ethtool netlink code should respond
with an error if request head has flags set which are not recognized by
kernel, either as a mistake or because it expects functionality introduced
in later kernel versions.

To avoid unnecessary roundtrips, use extack cookie to provide the
information about supported request flags.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>