From 7f348a60762afd4cd0e4e7fa14cfa66331b7c30e Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Wed, 20 Apr 2016 16:51:00 -0400 Subject: [PATCH] net: Add support for IP ID mangling TSO in cases that require encapsulation This patch adds support for NETIF_F_TSO_MANGLEID if a given tunnel supports NETIF_F_TSO. This way if needed a device can then later enable the TSO with IP ID mangling and the tunnels on top of that device can then also make use of the IP ID mangling as well. Signed-off-by: Alexander Duyck Signed-off-by: David S. Miller --- net/core/dev.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/net/core/dev.c b/net/core/dev.c index 52d446b2cb99..6324bc9267f7 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -7029,8 +7029,19 @@ int register_netdevice(struct net_device *dev) if (!(dev->flags & IFF_LOOPBACK)) dev->hw_features |= NETIF_F_NOCACHE_COPY; + /* If IPv4 TCP segmentation offload is supported we should also + * allow the device to enable segmenting the frame with the option + * of ignoring a static IP ID value. This doesn't enable the + * feature itself but allows the user to enable it later. + */ if (dev->hw_features & NETIF_F_TSO) dev->hw_features |= NETIF_F_TSO_MANGLEID; + if (dev->vlan_features & NETIF_F_TSO) + dev->vlan_features |= NETIF_F_TSO_MANGLEID; + if (dev->mpls_features & NETIF_F_TSO) + dev->mpls_features |= NETIF_F_TSO_MANGLEID; + if (dev->hw_enc_features & NETIF_F_TSO) + dev->hw_enc_features |= NETIF_F_TSO_MANGLEID; /* Make NETIF_F_HIGHDMA inheritable to VLAN devices. */