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net: hns3: Fix for geneve tx checksum bug

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when skb->encapsulation is 0, skb->ip_summed is CHECKSUM_PARTIAL
and it is udp packet, which has a dest port as the IANA assigned.
the hardware is expected to do the checksum offload, but the
hardware will not do the checksum offload when udp dest port is
6081.

This patch fixes it by doing the checksum in software.

Reported-by: Li Bing <libing@winhong.com>
Signed-off-by: Yi Li <yili@winhong.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yi Li 2020-08-26 13:11:50 +08:00 committed by David S. Miller
parent 0a3445b82e
commit a156998fc9
1 changed files with 4 additions and 2 deletions
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6
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
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@ -21,6 +21,7 @@
#include <net/pkt_cls.h>
#include <net/tcp.h>
#include <net/vxlan.h>
#include <net/geneve.h>
#include "hnae3.h"
#include "hns3_enet.h"
@ -780,7 +781,7 @@ static int hns3_get_l4_protocol(struct sk_buff *skb, u8 *ol4_proto,
* and it is udp packet, which has a dest port as the IANA assigned.
* the hardware is expected to do the checksum offload, but the
* hardware will not do the checksum offload when udp dest port is
* 4789.
* 4789 or 6081.
*/
static bool hns3_tunnel_csum_bug(struct sk_buff *skb)
{
@ -789,7 +790,8 @@ static bool hns3_tunnel_csum_bug(struct sk_buff *skb)
l4.hdr = skb_transport_header(skb);
if (!(!skb->encapsulation &&
l4.udp->dest == htons(IANA_VXLAN_UDP_PORT)))
(l4.udp->dest == htons(IANA_VXLAN_UDP_PORT) ||
l4.udp->dest == htons(GENEVE_UDP_PORT))))
return false;
skb_checksum_help(skb);