netdev - [RFC net-next 1/2] udp: add NETIF_F_GSO_UDP_L4 to NETIF_F_SOFTWARE

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Date:   Wed, 8 Jul 2020 11:48:55 +0800
From:   Huazhong Tan <tanhuazhong@...wei.com>
To:     <davem@...emloft.net>, <willemb@...gle.com>
CC:     <netdev@...r.kernel.org>, <linuxarm@...wei.com>, <kuba@...nel.org>,
        Huazhong Tan <tanhuazhong@...wei.com>
Subject: [RFC net-next 1/2] udp: add NETIF_F_GSO_UDP_L4 to NETIF_F_SOFTWARE_GSO

Add NETIF_F_SOFTWARE_GSO to the the list of GSO features with
a software fallback.  This allows UDP GSO to be used even if
the hardware does not support it, and for virtual device such
as VxLAN device, this UDP segmentation will be postponed to
physical device.

Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com>
---
 include/linux/netdev_features.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
index 2cc3cf8..c7eef16 100644
--- a/include/linux/netdev_features.h
+++ b/include/linux/netdev_features.h
@@ -207,7 +207,7 @@ static inline int find_next_netdev_feature(u64 feature, unsigned long start)
 				 NETIF_F_FSO)
 
 /* List of features with software fallbacks. */
-#define NETIF_F_GSO_SOFTWARE	(NETIF_F_ALL_TSO | \
+#define NETIF_F_GSO_SOFTWARE	(NETIF_F_ALL_TSO | NETIF_F_GSO_UDP_L4 | \
 				 NETIF_F_GSO_SCTP)
 
 /*
-- 
2.7.4