From 0345e1864283207bc236120dd3e13ff2391fa85f Mon Sep 17 00:00:00 2001 From: =?utf8?q?Micha=C5=82=20Miros=C5=82aw?= Date: Wed, 16 Nov 2011 14:05:33 +0000 Subject: [PATCH] net: verify GSO flag bits against netdev features MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Signed-off-by: Michał Mirosław Signed-off-by: David S. Miller --- include/linux/netdevice.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index b35ffd735ecc..31da3bbe7b1b 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -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; } -- 2.20.1