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Date: Thu, 18 Apr 2024 09:30:01 +0200
From: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
To: =?iso-8859-1?Q?Asbj=F8rn_Sloth_T=F8nnesen?= <ast@fiberby.net>
Cc: intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, Eric Dumazet <edumazet@google.com>,
	Tony Nguyen <anthony.l.nguyen@intel.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	"David S. Miller" <davem@davemloft.net>
Subject: Re: [Intel-wired-lan] [PATCH iwl-next] ice: flower: validate control
 flags
Message-ID: <ZiDL+TTeJWhYam6Q@mev-dev>
References: <20240416144331.15336-1-ast@fiberby.net>
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In-Reply-To: <20240416144331.15336-1-ast@fiberby.net>

On Tue, Apr 16, 2024 at 02:43:30PM +0000, Asbj?rn Sloth T?nnesen wrote:
> This driver currently doesn't support any control flags.
> 
> Use flow_rule_has_control_flags() to check for control flags,
> such as can be set through `tc flower ... ip_flags frag`.
> 
> In case any control flags are masked, flow_rule_has_control_flags()
> sets a NL extended error message, and we return -EOPNOTSUPP.
> 
> Only compile-tested.
> 
> Signed-off-by: Asbj?rn Sloth T?nnesen <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 2f2fce285ecd..361abd7d7561 100644
> --- a/drivers/net/ethernet/intel/ice/ice_tc_lib.c
> +++ b/drivers/net/ethernet/intel/ice/ice_tc_lib.c
> @@ -1673,6 +1673,10 @@ ice_parse_cls_flower(struct net_device *filter_dev, struct ice_vsi *vsi,
>  		flow_rule_match_control(rule, &match);
>  
>  		addr_type = match.key->addr_type;
> +
> +		if (flow_rule_has_control_flags(match.mask->flags,
> +						fltr->extack))
> +			return -EOPNOTSUPP;
>  	}
>  

Thanks,
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>

>  	if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
> -- 
> 2.43.0
>