netdev - RE: [PATCH net-next] octeontx2-pf: flower: check for unsupported control flags

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Message-ID: 
 <BY3PR18MB473745831DE04E6694F9EFD4C6112@BY3PR18MB4737.namprd18.prod.outlook.com>
Date: Tue, 23 Apr 2024 04:54:01 +0000
From: Sunil Kovvuri Goutham <sgoutham@...vell.com>
To: Asbjørn Sloth Tønnesen <ast@...erby.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "David S.
 Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>, Jakub
 Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Geethasowjanya
 Akula <gakula@...vell.com>,
        Subbaraya Sundeep Bhatta <sbhatta@...vell.com>,
        Hariprasad Kelam <hkelam@...vell.com>,
        Suman Ghosh <sumang@...vell.com>
Subject: RE: [PATCH net-next] octeontx2-pf: flower: check for unsupported
 control flags



> -----Original Message-----
> From: Asbjørn Sloth Tønnesen <ast@...erby.net>
> Sent: Monday, April 22, 2024 8:58 PM
> To: netdev@...r.kernel.org
> Cc: Asbjørn Sloth Tønnesen <ast@...erby.net>; linux-kernel@...r.kernel.org;
> David S. Miller <davem@...emloft.net>; Eric Dumazet
> <edumazet@...gle.com>; Jakub Kicinski <kuba@...nel.org>; Paolo Abeni
> <pabeni@...hat.com>; Sunil Kovvuri Goutham <sgoutham@...vell.com>;
> Geethasowjanya Akula <gakula@...vell.com>; Subbaraya Sundeep Bhatta
> <sbhatta@...vell.com>; Hariprasad Kelam <hkelam@...vell.com>; Suman
> Ghosh <sumang@...vell.com>
> Subject: [EXTERNAL] [PATCH net-next] octeontx2-pf: flower: check for
> unsupported control flags
> 
> Use flow_rule_is_supp_control_flags() to reject filters with unsupported
> control flags.
> 
> In case any unsupported control flags are masked,
> flow_rule_is_supp_control_flags() sets a NL extended error message, and we
> return -EOPNOTSUPP.
> 
> Remove FLOW_DIS_FIRST_FRAG specific error message, and treat it as any
> other unsupported control flag.
> 
> Only compile-tested.
> 
> Signed-off-by: Asbjørn Sloth Tønnesen <ast@...erby.net>
> ---
>  drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
> b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
> index 6d4ce2ece8d0..e63cc1eb6d89 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
> +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c
> @@ -700,10 +700,6 @@ static int otx2_tc_prepare_flow(struct otx2_nic *nic,
> struct otx2_tc_flow *node,
>  		u32 val;
> 
>  		flow_rule_match_control(rule, &match);
> -		if (match.mask->flags & FLOW_DIS_FIRST_FRAG) {
> -			NL_SET_ERR_MSG_MOD(extack, "HW doesn't
> support frag first/later");
> -			return -EOPNOTSUPP;
> -		}
> 
>  		if (match.mask->flags & FLOW_DIS_IS_FRAGMENT) {
>  			val = match.key->flags & FLOW_DIS_IS_FRAGMENT;
> @@ -721,6 +717,10 @@ static int otx2_tc_prepare_flow(struct otx2_nic *nic,
> struct otx2_tc_flow *node,
>  				return -EOPNOTSUPP;
>  			}
>  		}
> +
> +		if
> (!flow_rule_is_supp_control_flags(FLOW_DIS_IS_FRAGMENT,
> +						     match.mask->flags,
> extack))
> +			return -EOPNOTSUPP;
>  	}
> 
>  	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
> --
> 2.43.0

Reviewed-by: Sunil Goutham <sgoutham@...vell.com>