Re: [PATCH net-next 4/5] nfp: flower: validate encapsulation control flags

[Louis Peens <louis.peens@corigine.com>]

On Sun, Jun 09, 2024 at 05:33:54PM +0000, Asbjørn Sloth Tønnesen wrote:
> Encapsulation control flags are currently not used anywhere,
> so all flags are currently unsupported by all drivers.
> 
> This patch adds validation of this assumption, so that
> encapsulation flags may be used in the future.
> 
> In case any encapsulation control flags are masked,
> flow_rule_match_has_enc_control_flags() sets a NL extended
> error message, and we return -EOPNOTSUPP.
> 
> Only compile tested.
> 
> Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Looks fair to me, thanks.

Signed-off-by: Louis Peens <louis.peens@corigine.com>

> ---
>  drivers/net/ethernet/netronome/nfp/flower/offload.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/net/ethernet/netronome/nfp/flower/offload.c b/drivers/net/ethernet/netronome/nfp/flower/offload.c
> index 8e0a890381b60..46ffc2c208930 100644
> --- a/drivers/net/ethernet/netronome/nfp/flower/offload.c
> +++ b/drivers/net/ethernet/netronome/nfp/flower/offload.c
> @@ -321,6 +321,10 @@ nfp_flower_calculate_key_layers(struct nfp_app *app,
>  
>  		flow_rule_match_enc_control(rule, &enc_ctl);
>  
> +		if (flow_rule_has_enc_control_flags(enc_ctl.mask->flags,
> +						    extack))
> +			return -EOPNOTSUPP;
> +
>  		if (enc_ctl.mask->addr_type != 0xffff) {
>  			NL_SET_ERR_MSG_MOD(extack, "unsupported offload: wildcarded protocols on tunnels are not supported");
>  			return -EOPNOTSUPP;
> -- 
> 2.45.1
>