[dpdk-stable] [PATCH 1/2] app/testpmd: fix csumonly mode when run without outer chksum

[Li, Xiaoyun]

Hi

> -----Original Message-----
> From: Nithin Dabilpuram <ndabilpuram at marvell.com>
> Sent: Monday, August 16, 2021 15:10
> To: Li, Xiaoyun <xiaoyun.li at intel.com>
> Cc: jerinj at marvell.com; dev at dpdk.org; Nithin Dabilpuram
> <ndabilpuram at marvell.com>; jia.guo at intel.com; stable at dpdk.org
> Subject: [PATCH 1/2] app/testpmd: fix csumonly mode when run without outer
> chksum
> 
> Donot use outer metadata when neither outer ip checksum nor outer udp
> checksum is enabled. PMD's will ignore the outer_l2_len and outer_l3_len in
> cases where none of the outer checksum is enabled and hence only l2_len and
> l3_len will be used to calculate the offsets for L2 or L3 header.

I don't understand.
In process_outer_chksum, only PKT_TX_OUTER_IPV6 Will be set if it's ipv6 packets.
So PKT_TX_OUTER_IPV6 means this packet is tunnel ipv6 packet. So it actually needs outer l2 len and outer l3 len put them to hw.
At least i40e needs outer l2 len and outer l3 len as far as I know.

> 
> Fixes: 3c32113a1aac ("app/testpmd: fix IPv6 tunnel checksum")
> Cc: jia.guo at intel.com
> Cc: stable at dpdk.org
> 
> Signed-off-by: Nithin Dabilpuram <ndabilpuram at marvell.com>
> ---
>  app/test-pmd/csumonly.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c index
> 607c889..38cc256 100644
> --- a/app/test-pmd/csumonly.c
> +++ b/app/test-pmd/csumonly.c
> @@ -961,8 +961,7 @@ pkt_burst_checksum_forward(struct fwd_stream *fs)
>  			    (tx_offloads &
>  			     DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM) ||
>  			    (tx_offloads &
> -			     DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) ||
> -			    (tx_ol_flags & PKT_TX_OUTER_IPV6)) {
> +			     DEV_TX_OFFLOAD_OUTER_UDP_CKSUM)) {
>  				m->outer_l2_len = info.outer_l2_len;
>  				m->outer_l3_len = info.outer_l3_len;
>  				m->l2_len = info.l2_len;
> --
> 2.8.4