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net: verify GSO flag bits against netdev features 

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michał Mirosław 2011-11-16 14:05:33 +00:00 committed by David S. Miller
parent 3ad9b358e0
commit 0345e18642
1 changed files with 9 additions and 0 deletions
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9
include/linux/netdevice.h
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@ -2492,6 +2492,15 @@ netdev_features_t netif_skb_features(struct sk_buff *skb);
static inline int net_gso_ok(netdev_features_t features, int gso_type)
{
netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT;
/* check flags correspondence */
BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT));
BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
return (features & feature) == feature;
}