diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/if_vlan.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h index 4265d440ec4d..920e4457ce6e 100644 --- a/include/linux/if_vlan.h +++ b/include/linux/if_vlan.h @@ -606,4 +606,26 @@ static inline bool skb_vlan_tagged_multi(const struct sk_buff *skb) return true; } +/** + * vlan_features_check - drop unsafe features for skb with multiple tags. + * @skb: skbuff to query + * @features: features to be checked + * + * Returns features without unsafe ones if the skb has multiple tags. + */ +static inline netdev_features_t vlan_features_check(const struct sk_buff *skb, + netdev_features_t features) +{ + if (skb_vlan_tagged_multi(skb)) + features = netdev_intersect_features(features, + NETIF_F_SG | + NETIF_F_HIGHDMA | + NETIF_F_FRAGLIST | + NETIF_F_GEN_CSUM | + NETIF_F_HW_VLAN_CTAG_TX | + NETIF_F_HW_VLAN_STAG_TX); + + return features; +} + #endif /* !(_LINUX_IF_VLAN_H_) */ |