linux-kernel - RE: [Intel-wired-lan] [PATCH iwl-next] i40e: flower: validate control flags

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Message-ID: <PH0PR11MB5013807F66C976477212B27C961C2@PH0PR11MB5013.namprd11.prod.outlook.com>
Date: Mon, 6 May 2024 05:32:05 +0000
From: "Buvaneswaran, Sujai" <sujai.buvaneswaran@...el.com>
To: Asbjørn Sloth Tønnesen <ast@...erby.net>,
	"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Eric Dumazet
	<edumazet@...gle.com>, "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, "David S.
 Miller" <davem@...emloft.net>
Subject: RE: [Intel-wired-lan] [PATCH iwl-next] i40e: flower: validate control
 flags

Hi Asbjørn,

HW offload is not supported on the i40e interface. This patch cannot be tested on i40e interface.

Regards,
Sujai B

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of
> Asbjørn Sloth Tønnesen
> Sent: Tuesday, April 16, 2024 8:13 PM
> To: intel-wired-lan@...ts.osuosl.org
> Cc: netdev@...r.kernel.org; linux-kernel@...r.kernel.org; Eric Dumazet
> <edumazet@...gle.com>; Nguyen, Anthony L
> <anthony.l.nguyen@...el.com>; Asbjørn Sloth Tønnesen <ast@...erby.net>;
> Jakub Kicinski <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>;
> David S. Miller <davem@...emloft.net>
> Subject: [Intel-wired-lan] [PATCH iwl-next] i40e: flower: validate control flags
> 
> 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: Asbjørn Sloth Tønnesen <ast@...erby.net>
> ---
>  drivers/net/ethernet/intel/i40e/i40e_main.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
> b/drivers/net/ethernet/intel/i40e/i40e_main.c
> index 0bdcdea0be3e..e219f757820d 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> @@ -8643,6 +8643,10 @@ static int i40e_parse_cls_flower(struct i40e_vsi
> *vsi,
> 
>  		flow_rule_match_control(rule, &match);
>  		addr_type = match.key->addr_type;
> +
> +		if (flow_rule_has_control_flags(match.mask->flags,
> +						f->common.extack))
> +			return -EOPNOTSUPP;
>  	}
> 
>  	if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
> --
> 2.43.0