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authorToshiaki Makita <makita.toshiaki@lab.ntt.co.jp>2015-03-27 14:31:12 +0900
committerDavid S. Miller <davem@davemloft.net>2015-03-29 13:33:22 -0700
commit8cb65d00086bfba22bac87ff18b751432fc74003 (patch)
tree93911010d1ed7f433b57456af85680c13bf227f8 /include/linux/if_vlan.h
parentf5a7fb88e1f82542ca14ba93a1d4fa35471c60ca (diff)
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net: Move check for multiple vlans to drivers
To allow drivers to handle the features check for multiple tags, move the check to ndo_features_check(). As no drivers currently handle multiple tagged TSO, introduce dflt_features_check() and call it if the driver does not have ndo_features_check(). Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/if_vlan.h')
-rw-r--r--include/linux/if_vlan.h22
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_) */