diff options
Diffstat (limited to 'net/ipv4/ip_gre.c')
| -rw-r--r-- | net/ipv4/ip_gre.c | 50 |
1 files changed, 22 insertions, 28 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index aacee9dd771b..7e474a85deaf 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -748,6 +748,7 @@ free_skb: static void ipgre_link_update(struct net_device *dev, bool set_mtu) { struct ip_tunnel *tunnel = netdev_priv(dev); + __be16 flags; int len; len = tunnel->tun_hlen; @@ -763,19 +764,15 @@ static void ipgre_link_update(struct net_device *dev, bool set_mtu) if (set_mtu) dev->mtu = max_t(int, dev->mtu - len, 68); - if (!(tunnel->parms.o_flags & TUNNEL_SEQ)) { - if (!(tunnel->parms.o_flags & TUNNEL_CSUM) || - tunnel->encap.type == TUNNEL_ENCAP_NONE) { - dev->features |= NETIF_F_GSO_SOFTWARE; - dev->hw_features |= NETIF_F_GSO_SOFTWARE; - } else { - dev->features &= ~NETIF_F_GSO_SOFTWARE; - dev->hw_features &= ~NETIF_F_GSO_SOFTWARE; - } - dev->features |= NETIF_F_LLTX; - } else { + flags = tunnel->parms.o_flags; + + if (flags & TUNNEL_SEQ || + (flags & TUNNEL_CSUM && tunnel->encap.type != TUNNEL_ENCAP_NONE)) { + dev->features &= ~NETIF_F_GSO_SOFTWARE; dev->hw_features &= ~NETIF_F_GSO_SOFTWARE; - dev->features &= ~(NETIF_F_LLTX | NETIF_F_GSO_SOFTWARE); + } else { + dev->features |= NETIF_F_GSO_SOFTWARE; + dev->hw_features |= NETIF_F_GSO_SOFTWARE; } } @@ -949,6 +946,7 @@ static void ipgre_tunnel_setup(struct net_device *dev) static void __gre_tunnel_init(struct net_device *dev) { struct ip_tunnel *tunnel; + __be16 flags; tunnel = netdev_priv(dev); tunnel->tun_hlen = gre_calc_hlen(tunnel->parms.o_flags); @@ -957,25 +955,21 @@ static void __gre_tunnel_init(struct net_device *dev) tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen; dev->needed_headroom = tunnel->hlen + sizeof(tunnel->parms.iph); - dev->features |= GRE_FEATURES; + dev->features |= GRE_FEATURES | NETIF_F_LLTX; dev->hw_features |= GRE_FEATURES; - if (!(tunnel->parms.o_flags & TUNNEL_SEQ)) { - /* TCP offload with GRE SEQ is not supported, nor - * can we support 2 levels of outer headers requiring - * an update. - */ - if (!(tunnel->parms.o_flags & TUNNEL_CSUM) || - (tunnel->encap.type == TUNNEL_ENCAP_NONE)) { - dev->features |= NETIF_F_GSO_SOFTWARE; - dev->hw_features |= NETIF_F_GSO_SOFTWARE; - } + flags = tunnel->parms.o_flags; - /* Can use a lockless transmit, unless we generate - * output sequences - */ - dev->features |= NETIF_F_LLTX; - } + /* TCP offload with GRE SEQ is not supported, nor can we support 2 + * levels of outer headers requiring an update. + */ + if (flags & TUNNEL_SEQ) + return; + if (flags & TUNNEL_CSUM && tunnel->encap.type != TUNNEL_ENCAP_NONE) + return; + + dev->features |= NETIF_F_GSO_SOFTWARE; + dev->hw_features |= NETIF_F_GSO_SOFTWARE; } static int ipgre_tunnel_init(struct net_device *dev) |