netdev - Re: [PATCH net-next 2/2] sfc: implement IPv6 NFC (and IPV4_USER

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Date:	Fri, 05 Feb 2016 01:47:34 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Edward Cree <ecree@...arflare.com>,
	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, linux-net-drivers@...arflare.com
Subject: Re: [PATCH net-next 2/2] sfc: implement IPv6 NFC (and
 IPV4_USER_FLOW)

On Tue, 2016-02-02 at 18:49 +0000, Edward Cree wrote:
> Signed-off-by: Edward Cree <ecree@...arflare.com>
> ---
>  drivers/net/ethernet/sfc/ethtool.c | 176 +++++++++++++++++++++++++++++++++++++
>  1 file changed, 176 insertions(+)
> 
> diff --git a/drivers/net/ethernet/sfc/ethtool.c b/drivers/net/ethernet/sfc/ethtool.c
> index 0347976..49fac36 100644
> --- a/drivers/net/ethernet/sfc/ethtool.c
> +++ b/drivers/net/ethernet/sfc/ethtool.c
[...]
>  static int efx_ethtool_get_class_rule(struct efx_nic *efx,
>  				      struct ethtool_rx_flow_spec *rule)
>  {
[...]
> @@ -855,6 +896,39 @@ static int efx_ethtool_get_class_rule(struct efx_nic *efx,
>  			mac_entry->h_proto = spec.ether_type;
>  			mac_mask->h_proto = ETHER_TYPE_FULL_MASK;
>  		}
> +	} else if (spec.match_flags & EFX_FILTER_MATCH_ETHER_TYPE &&
> +		   spec.ether_type == htons(ETH_P_IP)) {

Shouldn't this also check that no unhandled match flags are set?

> +		rule->flow_type = IPV4_USER_FLOW;
> +		uip_entry->ip_ver = ETH_RX_NFC_IP4;
> +		if (spec.match_flags & EFX_FILTER_MATCH_IP_PROTO) {
> +			uip_mask->proto = IP_PROTO_FULL_MASK;
> +			uip_entry->proto = spec.ip_proto;
> +		}
> +		if (spec.match_flags & EFX_FILTER_MATCH_LOC_HOST) {
> +			uip_entry->ip4dst = spec.loc_host[0];
> +			uip_mask->ip4dst = IP4_ADDR_FULL_MASK;
> +		}
> +		if (spec.match_flags & EFX_FILTER_MATCH_REM_HOST) {
> +			uip_entry->ip4src = spec.rem_host[0];
> +			uip_mask->ip4src = IP4_ADDR_FULL_MASK;
> +		}
> +	} else if (spec.match_flags & EFX_FILTER_MATCH_ETHER_TYPE &&
> +		   spec.ether_type == htons(ETH_P_IPV6)) {

Same here.

[...]
>  static int efx_ethtool_set_class_rule(struct efx_nic *efx,
>                                       struct ethtool_rx_flow_spec *rule)
>  {
[...]
> +       case IPV6_USER_FLOW:
> +               if (uip6_mask-&gt;l4_4_bytes || uip6_mask-&gt;tos)
> +                       return -EINVAL;
> +               spec.match_flags = EFX_FILTER_MATCH_ETHER_TYPE;
> +               spec.ether_type = htons(ETH_P_IPV6);
> +		if (!ip6_mask_is_empty(ip6_mask->ip6dst)) {

This should use uip6_mask not ip6_mask.

> +			if (!ip6_mask_is_full(uip6_mask->ip6dst))
> +				return -EINVAL;
> +			spec.match_flags |= EFX_FILTER_MATCH_LOC_HOST;
> +			memcpy(spec.loc_host, uip6_entry->ip6dst, sizeof(spec.loc_host));
> +		}
> +		if (!ip6_mask_is_empty(ip6_mask->ip6src)) {
[...]

Same here.

Ben.

-- 
Ben Hutchings
It is a miracle that curiosity survives formal education. - Albert Einstein
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