[Intel-wired-lan] [PATCH iwl-next] ice: flower: validate control flags

[Buvaneswaran, Sujai]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces at osuosl.org> On Behalf Of
> Asbjørn Sloth Tønnesen
> Sent: Tuesday, April 16, 2024 8:14 PM
> To: intel-wired-lan at lists.osuosl.org
> Cc: netdev at vger.kernel.org; linux-kernel at vger.kernel.org; Eric Dumazet
> <edumazet at google.com>; Nguyen, Anthony L
> <anthony.l.nguyen at intel.com>; Asbjørn Sloth Tønnesen <ast at fiberby.net>;
> Jakub Kicinski <kuba at kernel.org>; Paolo Abeni <pabeni at redhat.com>;
> David S. Miller <davem at davemloft.net>
> Subject: [Intel-wired-lan] [PATCH iwl-next] ice: 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 at fiberby.net>
> ---
>  drivers/net/ethernet/intel/ice/ice_tc_lib.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 

Hi,

I have tested this patch in upstream kernel - 6.9.0-rc5+ and observing no effect while adding tc flow rule with control flags.
'Not supported' error is not shown while adding the below tc rule.

[root at cbl-mariner ~]# tc qdisc add dev ens5f0np0 ingress
[root at cbl-mariner ~]# 
[root at cbl-mariner ~]# tc filter add dev ens5f0np0 ingress protocol ip flower ip_flags frag/firstfrag action drop
[root at cbl-mariner ~]# 
[root at cbl-mariner ~]# ethtool -i ens5f0np0
driver: ice
version: 6.9.0-rc5+
firmware-version: 4.40 0x8001c967 1.3534.0
expansion-rom-version: 
bus-info: 0000:b1:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: yes

Same behavior is observed with iavf driver on VF as well.

Regards,
Sujai B