tree 5d922a8db18ccd49c58832472f85b19ffbad31b2
parent 88db6d1e4f6222d22c1c4b4d4d7166cfa9d2fe0e
author Michal Kubecek <mkubecek@suse.cz> 1584043678 +0100
committer David S. Miller <davem@davemloft.net> 1584052352 -0700

ethtool: set netdev features with FEATURES_SET request

Implement FEATURES_SET netlink request to set network device features.
These are traditionally set using ETHTOOL_SFEATURES ioctl request.

Actual change is subject to netdev_change_features() sanity checks so that
it can differ from what was requested. Unlike with most other SET requests,
in addition to error code and optional extack, kernel provides an optional
reply message (ETHTOOL_MSG_FEATURES_SET_REPLY) in the same format but with
different semantics: information about difference between user request and
actual result and difference between old and new state of dev->features.
This reply message can be suppressed by setting ETHTOOL_FLAG_OMIT_REPLY
flag in request header.

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