Commit d764a122 authored by Sabrina Dubroca's avatar Sabrina Dubroca Committed by David S. Miller
Browse files

net: add new netdevice feature for offload of RX port for UDP tunnels 



This adds a new netdevice feature, so that the offloading of RX port for
UDP tunnels can be disabled by the administrator on some netdevices,
using the "rx-udp_tunnel-port-offload" feature in ethtool.

This feature is set for all devices that provide ndo_udp_tunnel_add.

Signed-off-by: default avatarSabrina Dubroca <sd@queasysnail.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5b861f6b

include/linux/netdev_features.h

+2 −0
Original line number Diff line number Diff line
@@ -75,6 +75,7 @@ enum { 
	NETIF_F_HW_TC_BIT,		/* Offload TC infrastructure */

	NETIF_F_HW_ESP_BIT,		/* Hardware ESP transformation offload */

	NETIF_F_HW_ESP_TX_CSUM_BIT,	/* ESP with TX checksum offload */

	NETIF_F_RX_UDP_TUNNEL_PORT_BIT, /* Offload of RX port for UDP tunnels */



	/*

	 * Add your fresh new feature above and remember to update
@@ -138,6 +139,7 @@ enum { 
#define NETIF_F_HW_TC		__NETIF_F(HW_TC)

#define NETIF_F_HW_ESP		__NETIF_F(HW_ESP)

#define NETIF_F_HW_ESP_TX_CSUM	__NETIF_F(HW_ESP_TX_CSUM)

#define	NETIF_F_RX_UDP_TUNNEL_PORT  __NETIF_F(RX_UDP_TUNNEL_PORT)



#define for_each_netdev_feature(mask_addr, bit)	\

	for_each_set_bit(bit, (unsigned long *)mask_addr, NETDEV_FEATURE_COUNT)

net/core/dev.c

+6 −0
Original line number Diff line number Diff line
@@ -7530,6 +7530,12 @@ int register_netdevice(struct net_device *dev) 
	 */

	dev->hw_features |= NETIF_F_SOFT_FEATURES;

	dev->features |= NETIF_F_SOFT_FEATURES;



	if (dev->netdev_ops->ndo_udp_tunnel_add) {

		dev->features |= NETIF_F_RX_UDP_TUNNEL_PORT;

		dev->hw_features |= NETIF_F_RX_UDP_TUNNEL_PORT;

	}



	dev->wanted_features = dev->features & dev->hw_features;



	if (!(dev->flags & IFF_LOOPBACK))

net/core/ethtool.c

+1 −0
Original line number Diff line number Diff line
@@ -105,6 +105,7 @@ static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] 
	[NETIF_F_HW_TC_BIT] =		 "hw-tc-offload",

	[NETIF_F_HW_ESP_BIT] =		 "esp-hw-offload",

	[NETIF_F_HW_ESP_TX_CSUM_BIT] =	 "esp-tx-csum-hw-offload",

	[NETIF_F_RX_UDP_TUNNEL_PORT_BIT] =	 "rx-udp_tunnel-port-offload",

};



static const char

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