Re: [Intel-wired-lan] [PATCH net-next 5/5] ice: flower: validate encapsulation control flags

[Marcin Szycik <marcin.szycik@linux.intel.com>]

On 09.06.2024 19:33, Asbjørn Sloth Tønnesen wrote:
> Encapsulation control flags are currently not used anywhere,
> so all flags are currently unsupported by all drivers.
> 
> This patch adds validation of this assumption, so that
> encapsulation flags may be used in the future.
> 
> In case any encapsulation control flags are masked,
> flow_rule_match_has_enc_control_flags() sets a NL extended
> error message, and we return -EOPNOTSUPP.
> 
> Only compile tested.

Reviewed-by: Marcin Szycik <marcin.szycik@linux.intel.com>

> Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
> ---
>  drivers/net/ethernet/intel/ice/ice_tc_lib.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/net/ethernet/intel/ice/ice_tc_lib.c b/drivers/net/ethernet/intel/ice/ice_tc_lib.c
> index 8bd24b33f3a67..e6923f8121a99 100644
> --- a/drivers/net/ethernet/intel/ice/ice_tc_lib.c
> +++ b/drivers/net/ethernet/intel/ice/ice_tc_lib.c
> @@ -1353,6 +1353,7 @@ ice_parse_tunnel_attr(struct net_device *dev, struct flow_rule *rule,
>  		      struct ice_tc_flower_fltr *fltr)
>  {
>  	struct ice_tc_flower_lyr_2_4_hdrs *headers = &fltr->outer_headers;
> +	struct netlink_ext_ack *extack = fltr->extack;
>  	struct flow_match_control enc_control;
>  
>  	fltr->tunnel_type = ice_tc_tun_get_type(dev);
> @@ -1373,6 +1374,9 @@ ice_parse_tunnel_attr(struct net_device *dev, struct flow_rule *rule,
>  
>  	flow_rule_match_enc_control(rule, &enc_control);
>  
> +	if (flow_rule_has_enc_control_flags(enc_control.mask->flags, extack))
> +		return -EOPNOTSUPP;
> +
>  	if (enc_control.key->addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
>  		struct flow_match_ipv4_addrs match;
>