Currently, IAVF's decode_rx_desc_ptype() correctly reports payload type
of L4 for IPv4 UDP packets and IPv{4,6} TCP, but only L3 for IPv6 UDP.
Originally, i40e, ice and iavf were affected.
Commit 73df8c9e3e3d ("i40e: Correct UDP packet header for non_tunnel-ipv6")
fixed that in i40e, then
commit 638a0c8c8861 ("ice: fix incorrect payload indicator on PTYPE")
fixed that for ice.
IPv6 UDP is L4 obviously. Fix it and make iavf report correct L4 hash
type for such packets, so that the stack won't calculate it on CPU when
needs it.

Fixes: 206812b5fccb ("i40e/i40evf: i40e implementation for skb_set_hash")
Reviewed-by: Larysa Zaremba <larysa.zaremba@intel.com>
Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
---
 drivers/net/ethernet/intel/iavf/iavf_common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/iavf/iavf_common.c b/drivers/net/ethernet/intel/iavf/iavf_common.c
index 16c490965b61..dd11dbbd5551 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_common.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_common.c
@@ -661,7 +661,7 @@ struct iavf_rx_ptype_decoded iavf_ptype_lookup[BIT(8)] = {
 	/* Non Tunneled IPv6 */
 	IAVF_PTT(88, IP, IPV6, FRG, NONE, NONE, NOF, NONE, PAY3),
 	IAVF_PTT(89, IP, IPV6, NOF, NONE, NONE, NOF, NONE, PAY3),
-	IAVF_PTT(90, IP, IPV6, NOF, NONE, NONE, NOF, UDP,  PAY3),
+	IAVF_PTT(90, IP, IPV6, NOF, NONE, NONE, NOF, UDP,  PAY4),
 	IAVF_PTT_UNUSED_ENTRY(91),
 	IAVF_PTT(92, IP, IPV6, NOF, NONE, NONE, NOF, TCP,  PAY4),
 	IAVF_PTT(93, IP, IPV6, NOF, NONE, NONE, NOF, SCTP, PAY4),
-- 
2.39.2

From: Alexander Lobakin <aleksander.lobakin@intel.com>
Date: Tue, 28 Feb 2023 17:46:13 +0100

> [PATCH net v2 2/2] iavf: fix non-tunneled IPv6 UDP packet type and hashing
> v2

How this got here ._.
Lemme know if I should resend (it's probably okay for Git, but may broke
Patchwork, dunno).

> Currently, IAVF's decode_rx_desc_ptype() correctly reports payload type
> of L4 for IPv4 UDP packets and IPv{4,6} TCP, but only L3 for IPv6 UDP.
> Originally, i40e, ice and iavf were affected.
> Commit 73df8c9e3e3d ("i40e: Correct UDP packet header for non_tunnel-ipv6")
> fixed that in i40e, then
> commit 638a0c8c8861 ("ice: fix incorrect payload indicator on PTYPE")
> fixed that for ice.
> IPv6 UDP is L4 obviously. Fix it and make iavf report correct L4 hash
> type for such packets, so that the stack won't calculate it on CPU when
> needs it.
> 
> Fixes: 206812b5fccb ("i40e/i40evf: i40e implementation for skb_set_hash")
> Reviewed-by: Larysa Zaremba <larysa.zaremba@intel.com>
> Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
> Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
> ---
>  drivers/net/ethernet/intel/iavf/iavf_common.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/intel/iavf/iavf_common.c b/drivers/net/ethernet/intel/iavf/iavf_common.c
> index 16c490965b61..dd11dbbd5551 100644
> --- a/drivers/net/ethernet/intel/iavf/iavf_common.c
> +++ b/drivers/net/ethernet/intel/iavf/iavf_common.c
> @@ -661,7 +661,7 @@ struct iavf_rx_ptype_decoded iavf_ptype_lookup[BIT(8)] = {
>  	/* Non Tunneled IPv6 */
>  	IAVF_PTT(88, IP, IPV6, FRG, NONE, NONE, NOF, NONE, PAY3),
>  	IAVF_PTT(89, IP, IPV6, NOF, NONE, NONE, NOF, NONE, PAY3),
> -	IAVF_PTT(90, IP, IPV6, NOF, NONE, NONE, NOF, UDP,  PAY3),
> +	IAVF_PTT(90, IP, IPV6, NOF, NONE, NONE, NOF, UDP,  PAY4),
>  	IAVF_PTT_UNUSED_ENTRY(91),
>  	IAVF_PTT(92, IP, IPV6, NOF, NONE, NONE, NOF, TCP,  PAY4),
>  	IAVF_PTT(93, IP, IPV6, NOF, NONE, NONE, NOF, SCTP, PAY4),

Thanks,
Olek

On Tue, 28 Feb 2023 17:52:56 +0100 Alexander Lobakin wrote:
> > [PATCH net v2 2/2] iavf: fix non-tunneled IPv6 UDP packet type and hashing
> > v2  
> 
> How this got here ._.
> Lemme know if I should resend (it's probably okay for Git, but may broke
> Patchwork, dunno).

Also patch 1 is not versioned and patch 2 is v2 :S

I think repost would be good, and please put on the To: line the
person/group who you expect to apply the patch - either netdev
maintainers or Tony.