Re: [dpdk-dev] [PATCH] net/i40e: fix forward outer IPv6 VXLAN packets

["Xing, Beilei" <beilei.xing@intel.com>]

> -----Original Message-----
> From: Wang, Jie1X <jie1x.wang@intel.com>
> Sent: Tuesday, November 2, 2021 3:08 PM
> To: dev@dpdk.org
> Cc: Zhang, Yuying <yuying.zhang@intel.com>; Li, Xiaoyun
> <xiaoyun.li@intel.com>; Yang, SteveX <stevex.yang@intel.com>; Xing, Beilei
> <beilei.xing@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>; Wang, Jie1X
> <jie1x.wang@intel.com>; stable@dpdk.org
> Subject: [PATCH] net/i40e: fix forward outer IPv6 VXLAN packets
> 
> Testpmd forwards packets in checksum mode that it need to calculate the
> checksum of each layer's protocol. Then it will fill flags and header length into
> mbuf.
> 
> In process_outer_cksums, HW calculates the outer checksum if tx_offloads
> contains outer UDP checksum otherwise SW calculates the outer checksum.
> 
> When tx_offloads contains outer UDP checksum or outer IPv4 checksum,
> mbuf will be filled with correct header length.
> 
> This patch added outer UDP checksum in tx_offload_capa and
> I40E_TX_OFFLOAD_MASK, when we set csum hw outer-udp on that the
> engine can forward outer IPv6 VXLAN packets.
> 
> Fixes: 399421100e08 ("net/i40e: fix missing mbuf fast free offload")
Seems it's not the right fix line. Could you check if it should be 7497d3e2f777 ("net/i40e: convert to new Tx offloads API").

> Cc: stable@dpdk.org
> 
> Signed-off-by: Jie Wang <jie1x.wang@intel.com>
> ---
>  drivers/net/i40e/i40e_ethdev.c | 1 +
>  drivers/net/i40e/i40e_rxtx.c   | 1 +
>  2 files changed, 2 insertions(+)
> 
> diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
> index 62e374d19e..faf6391350 100644
> --- a/drivers/net/i40e/i40e_ethdev.c
> +++ b/drivers/net/i40e/i40e_ethdev.c
> @@ -3746,6 +3746,7 @@ i40e_dev_info_get(struct rte_eth_dev *dev, struct
> rte_eth_dev_info *dev_info)
>  		RTE_ETH_TX_OFFLOAD_IPIP_TNL_TSO |
>  		RTE_ETH_TX_OFFLOAD_GENEVE_TNL_TSO |
>  		RTE_ETH_TX_OFFLOAD_MULTI_SEGS |
> +		RTE_ETH_TX_OFFLOAD_OUTER_UDP_CKSUM |
>  		dev_info->tx_queue_offload_capa;
>  	dev_info->dev_capa =
>  		RTE_ETH_DEV_CAPA_RUNTIME_RX_QUEUE_SETUP | diff --git
> a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c index
> 6ccb598677..41fe3bf481 100644
> --- a/drivers/net/i40e/i40e_rxtx.c
> +++ b/drivers/net/i40e/i40e_rxtx.c
> @@ -65,6 +65,7 @@
>  		RTE_MBUF_F_TX_QINQ |       \
>  		RTE_MBUF_F_TX_VLAN |	\
>  		RTE_MBUF_F_TX_TUNNEL_MASK |	\
> +		RTE_MBUF_F_TX_OUTER_UDP_CKSUM |	\
>  		I40E_TX_IEEE1588_TMST)
> 
>  #define I40E_TX_OFFLOAD_NOTSUP_MASK \
> --
> 2.25.1