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Message-ID: <b3e2ea3cc3c3a4c8be831a837bc23d40e3395dfe.camel@redhat.com>
Subject: Re: [PATCH net-next v2] net/mlx5e: flower: check for unsupported
 control flags
From: Paolo Abeni <pabeni@redhat.com>
To: Tariq Toukan <ttoukan.linux@gmail.com>, =?ISO-8859-1?Q?Asbj=F8rn?=
	Sloth =?ISO-8859-1?Q?T=F8nnesen?=
	 <ast@fiberby.net>, netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, "David S. Miller" <davem@davemloft.net>, 
 Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, Saeed
 Mahameed <saeedm@nvidia.com>,  Tariq Toukan <tariqt@nvidia.com>, Leon
 Romanovsky <leon@kernel.org>, Jianbo Liu <jianbol@nvidia.com>
Date: Thu, 02 May 2024 13:30:26 +0200
In-Reply-To: <25a4890f-8b6f-4fb3-970f-b022b7ad5be8@gmail.com>
References: <20240422152728.175677-1-ast@fiberby.net>
	 <25a4890f-8b6f-4fb3-970f-b022b7ad5be8@gmail.com>
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On Tue, 2024-04-30 at 08:15 +0300, Tariq Toukan wrote:
>=20
> On 22/04/2024 18:27, Asbj=C3=B8rn Sloth T=C3=B8nnesen wrote:
> > Use flow_rule_is_supp_control_flags() to reject filters
> > with unsupported control flags.
> >=20
> > In case any unsupported control flags are masked,
> > flow_rule_is_supp_control_flags() sets a NL extended
> > error message, and we return -EOPNOTSUPP.
> >=20
> > Remove FLOW_DIS_FIRST_FRAG specific error message,
> > and treat it as any other unsupported control flag.
> >=20
> > Only compile-tested.
> >=20
> > Signed-off-by: Asbj=C3=B8rn Sloth T=C3=B8nnesen <ast@fiberby.net>
> > ---
> >=20
> > Changelog:
> >=20
> > v2:
> > - remove existing FLOW_DIS_FIRST_FRAG "support" (requested by Jianbo)
> >=20
> > v1: https://lore.kernel.org/netdev/20240417135110.99900-1-ast@fiberby.n=
et/
> >=20
> >   drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 10 ++++------
> >   1 file changed, 4 insertions(+), 6 deletions(-)
> >=20
> > diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/=
net/ethernet/mellanox/mlx5/core/en_tc.c
> > index aeb32cb27182..30673292e15f 100644
> > --- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
> > +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
> > @@ -2801,12 +2801,6 @@ static int __parse_cls_flower(struct mlx5e_priv =
*priv,
> >   		flow_rule_match_control(rule, &match);
> >   		addr_type =3D match.key->addr_type;
> >  =20
> > -		/* the HW doesn't support frag first/later */
> > -		if (match.mask->flags & FLOW_DIS_FIRST_FRAG) {
> > -			NL_SET_ERR_MSG_MOD(extack, "Match on frag first/later is not suppor=
ted");
> > -			return -EOPNOTSUPP;
> > -		}
> > -
> >   		if (match.mask->flags & FLOW_DIS_IS_FRAGMENT) {
> >   			MLX5_SET(fte_match_set_lyr_2_4, headers_c, frag, 1);
> >   			MLX5_SET(fte_match_set_lyr_2_4, headers_v, frag,
> > @@ -2819,6 +2813,10 @@ static int __parse_cls_flower(struct mlx5e_priv =
*priv,
> >   			else
> >   				*match_level =3D MLX5_MATCH_L3;
> >   		}
> > +
> > +		if (!flow_rule_is_supp_control_flags(FLOW_DIS_IS_FRAGMENT,
> > +						     match.mask->flags, extack))
> > +			return -EOPNOTSUPP;
> >   	}
> >  =20
> >   	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
>=20
> Acked-by: Tariq Toukan <tariqt@nvidia.com>

@Tariq/@Saeed: do you want to take this patch towards your tree and
send or do you prefer we merge it directly? I tend to read the above
ack as the 2nd option, but given this is only build tested I guess the
first would be better...

Thanks,

Paolo