[Intel-wired-lan] [PATCH net v1] ice: Fix tunnel checksum offload with fragmented traffic

[G, GurucharanX]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces at osuosl.org> On Behalf Of
> Jedrzej Jagielski
> Sent: Monday, July 18, 2022 5:04 PM
> To: intel-wired-lan at lists.osuosl.org
> Cc: Patynowski, PrzemyslawX <przemyslawx.patynowski at intel.com>;
> Jagielski, Jedrzej <jedrzej.jagielski at intel.com>
> Subject: [Intel-wired-lan] [PATCH net v1] ice: Fix tunnel checksum offload
> with fragmented traffic
> 
> From: Przemyslaw Patynowski <przemyslawx.patynowski at intel.com>
> 
> Fix checksum offload on VXLAN tunnels.
> In case, when mpls protocol is not used, set l4 header to transport header of
> skb. This fixes case, when user tries to offload checksums of VXLAN tunneled
> traffic.
> 
> Steps for reproduction (requires link partner with tunnels):
> ip l s enp130s0f0 up
> ip a f enp130s0f0
> ip a a 10.10.110.2/24 dev enp130s0f0
> ip l s enp130s0f0 mtu 1600
> ip link add vxlan12_sut type vxlan id 12 group 238.168.100.100 dev
> enp130s0f0 dstport 4789 ip l s vxlan12_sut up ip a a 20.10.110.2/24 dev
> vxlan12_sut
> iperf3 -c 20.10.110.1 #should connect
> 
> Offload params: td_offset, cd_tunnel_params were corrupted, due to l4
> header pointing wrong address. NIC would then drop those packets
> internally, due to incorrect TX descriptor data, which increased GLV_TEPC
> register.
> 
> Fixes: 69e66c04c672 ("ice: Add mpls+tso support")
> Signed-off-by: Przemyslaw Patynowski
> <przemyslawx.patynowski at intel.com>
> Signed-off-by: Mateusz Palczewski <mateusz.palczewski at intel.com>
> Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski at intel.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_txrx.c | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 

Tested-by: Gurucharan <gurucharanx.g at intel.com> (A Contingent worker at Intel)