Hi Simon
On Tue, 2014-06-03 at 11:38 +0900, Simon Horman wrote:
> +/* If MPLS offload request, verify we are testing hardware MPLS features
> + * instead of standard features for the netdev.
> + */
> +#ifdef CONFIG_NET_MPLS_GSO
> +static netdev_features_t net_mpls_features(struct sk_buff *skb,
> + netdev_features_t features)
> +{
> + int tmp;
> + __be16 type;
> +
> + type = skb_network_protocol(skb, &tmp);
> + if (unlikely(type == cpu_to_be16(ETH_P_MPLS_UC) ||
> + type == cpu_to_be16(ETH_P_MPLS_MC)))
I believe net/core/dev.c prefers to use htons(ETH_P_MPLS_UC)
(check netif_skb_features())
> + features &= skb->dev->mpls_features;
> +
> + return features;
> +}
> +#else
> +static netdev_features_t net_mpls_features(struct sk_buff *skb,
> + netdev_features_t features)
> +{
> + return features;
> +}
> +#endif
> +
> static netdev_features_t harmonize_features(struct sk_buff *skb,
> netdev_features_t features)
> {
> int tmp;
_be16 type;
type = skb_network_protocol(skb, &tmp);
>
> + features = net_mpls_features(skb, features);
features = net_mpls_features(skb, features, type);
> +
> if (skb->ip_summed != CHECKSUM_NONE &&
> !can_checksum_protocol(features, skb_network_protocol(skb, &tmp))) {
!can_checksum_protocol(features, type)) {
> features &= ~NETIF_F_ALL_CSUM;
I guess CONFIG_NET_MPLS_GSO will be set by all distros, right ?
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