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Commit b7f4c0ba authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'vxlan_gso_check' 

Joe Stringer says:

====================
Implement ndo_gso_check() for vxlan nics

Most NICs that report NETIF_F_GSO_UDP_TUNNEL support VXLAN, and not other
UDP-based encapsulation protocols where the format and size of the header may
differ. This patch series implements a generic ndo_gso_check() for detecting
VXLAN, then reuses it for these NICs.

Implementation shamelessly stolen from Tom Herbert (with minor fixups):
http://thread.gmane.org/gmane.linux.network/332428/focus=333111



v2: Drop i40e/fm10k patches (code diverged; handling separately).
    Refactor common code into vxlan_gso_check() helper.
    Minor style fixes.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 8a5809e0 795a05c1

drivers/net/ethernet/emulex/benet/be_main.c

+6 −0
Original line number Diff line number Diff line
@@ -4421,6 +4421,11 @@ static void be_del_vxlan_port(struct net_device *netdev, sa_family_t sa_family, 
		 "Disabled VxLAN offloads for UDP port %d\n",

		 be16_to_cpu(port));

}



static bool be_gso_check(struct sk_buff *skb, struct net_device *dev)

{

	return vxlan_gso_check(skb);

}

#endif



static const struct net_device_ops be_netdev_ops = {
@@ -4450,6 +4455,7 @@ static const struct net_device_ops be_netdev_ops = { 
#ifdef CONFIG_BE2NET_VXLAN

	.ndo_add_vxlan_port	= be_add_vxlan_port,

	.ndo_del_vxlan_port	= be_del_vxlan_port,

	.ndo_gso_check		= be_gso_check,

#endif

};

drivers/net/ethernet/mellanox/mlx4/en_netdev.c

+6 −0
Original line number Diff line number Diff line
@@ -2355,6 +2355,11 @@ static void mlx4_en_del_vxlan_port(struct net_device *dev, 


	queue_work(priv->mdev->workqueue, &priv->vxlan_del_task);

}



static bool mlx4_en_gso_check(struct sk_buff *skb, struct net_device *dev)

{

	return vxlan_gso_check(skb);

}

#endif



static const struct net_device_ops mlx4_netdev_ops = {
@@ -2386,6 +2391,7 @@ static const struct net_device_ops mlx4_netdev_ops = { 
#ifdef CONFIG_MLX4_EN_VXLAN

	.ndo_add_vxlan_port	= mlx4_en_add_vxlan_port,

	.ndo_del_vxlan_port	= mlx4_en_del_vxlan_port,

	.ndo_gso_check		= mlx4_en_gso_check,

#endif

};

drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c

+6 −0
Original line number Diff line number Diff line
@@ -503,6 +503,11 @@ static void qlcnic_del_vxlan_port(struct net_device *netdev, 


	adapter->flags |= QLCNIC_DEL_VXLAN_PORT;

}



static bool qlcnic_gso_check(struct sk_buff *skb, struct net_device *dev)

{

	return vxlan_gso_check(skb);

}

#endif



static const struct net_device_ops qlcnic_netdev_ops = {
@@ -526,6 +531,7 @@ static const struct net_device_ops qlcnic_netdev_ops = { 
#ifdef CONFIG_QLCNIC_VXLAN

	.ndo_add_vxlan_port	= qlcnic_add_vxlan_port,

	.ndo_del_vxlan_port	= qlcnic_del_vxlan_port,

	.ndo_gso_check		= qlcnic_gso_check,

#endif

#ifdef CONFIG_NET_POLL_CONTROLLER

	.ndo_poll_controller = qlcnic_poll_controller,

drivers/net/vxlan.c

+13 −0
Original line number Diff line number Diff line
@@ -1571,6 +1571,19 @@ static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb) 
	return false;

}



bool vxlan_gso_check(struct sk_buff *skb)

{

	if ((skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL) &&

	    (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||

	     skb->inner_protocol != htons(ETH_P_TEB) ||

	     (skb_inner_mac_header(skb) - skb_transport_header(skb) !=

	      sizeof(struct udphdr) + sizeof(struct vxlanhdr))))

		return false;



	return true;

}

EXPORT_SYMBOL_GPL(vxlan_gso_check);



#if IS_ENABLED(CONFIG_IPV6)

static int vxlan6_xmit_skb(struct vxlan_sock *vs,

			   struct dst_entry *dst, struct sk_buff *skb,

include/net/vxlan.h

+2 −0
Original line number Diff line number Diff line
@@ -45,6 +45,8 @@ int vxlan_xmit_skb(struct vxlan_sock *vs, 
		   __be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,

		   __be16 src_port, __be16 dst_port, __be32 vni, bool xnet);



bool vxlan_gso_check(struct sk_buff *skb);



/* IP header + UDP + VXLAN + Ethernet header */

#define VXLAN_HEADROOM (20 + 8 + 8 + 14)

/* IPv6 header + UDP + VXLAN + Ethernet header */