netdev - [PATCH RFC net-next 06/11] udp: add gso support to virtual devices

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Date:   Tue, 17 Apr 2018 16:00:56 -0400
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     netdev@...r.kernel.org
Cc:     Willem de Bruijn <willemb@...gle.com>
Subject: [PATCH RFC net-next 06/11] udp: add gso support to virtual devices

From: Willem de Bruijn <willemb@...gle.com>

Virtual devices such as tunnels and bonding can handle large packets.
Only segment packets when reaching a physical or loopback device.

Signed-off-by: Willem de Bruijn <willemb@...gle.com>
---
 include/linux/netdev_features.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
index 35b79f47a13d..1e4883bb02a7 100644
--- a/include/linux/netdev_features.h
+++ b/include/linux/netdev_features.h
@@ -80,6 +80,7 @@ enum {
 
 	NETIF_F_GRO_HW_BIT,		/* Hardware Generic receive offload */
 	NETIF_F_HW_TLS_RECORD_BIT,	/* Offload TLS record */
+	NETIF_F_GSO_UDP_L4_BIT,		/* UDP payload GSO (not UFO) */
 
 	/*
 	 * Add your fresh new feature above and remember to update
@@ -147,6 +148,7 @@ enum {
 #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 NETIF_F_HW_TLS_RECORD	__NETIF_F(HW_TLS_RECORD)
+#define NETIF_F_GSO_UDP_L4	__NETIF_F(GSO_UDP_L4)
 
 #define for_each_netdev_feature(mask_addr, bit)	\
 	for_each_set_bit(bit, (unsigned long *)mask_addr, NETDEV_FEATURE_COUNT)
@@ -216,6 +218,7 @@ enum {
 				 NETIF_F_GSO_GRE_CSUM |			\
 				 NETIF_F_GSO_IPXIP4 |			\
 				 NETIF_F_GSO_IPXIP6 |			\
+				 NETIF_F_GSO_UDP_L4 |			\
 				 NETIF_F_GSO_UDP_TUNNEL |		\
 				 NETIF_F_GSO_UDP_TUNNEL_CSUM)
 
-- 
2.17.0.484.g0c8726318c-goog