[PATCH] net: fix incorrect L2 length for GRE tunneling packet

[Thomas Monjalon]

Looking for review, please.


23/07/2025 12:47, Dengdui Huang:
> The meaning of L2_len in the parsing result of the rte_net_get_ptype()
> is the same as the L2_len field in the mbuf. For tunnel packets,
> the L2_len should include protocol header of tunnel packets.
> 
> Bugzilla ID: 1754
> Fixes: d21d855464ff ("net: support GRE in software packet type parser")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Dengdui Huang <huangdengdui at huawei.com>
> ---
>  lib/net/rte_net.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/lib/net/rte_net.c b/lib/net/rte_net.c
> index 44fb6c0f51..c70b57fdc0 100644
> --- a/lib/net/rte_net.c
> +++ b/lib/net/rte_net.c
> @@ -481,6 +481,7 @@ uint32_t rte_net_get_ptype(const struct rte_mbuf *m,
>  
>  		pkt_type |= ptype_tunnel_without_udp(&proto, m, &off);
>  		hdr_lens->tunnel_len = off - prev_off;
> +		hdr_lens->inner_l2_len = off - prev_off;
>  	}
>  
>  	/* same job for inner header: we need to duplicate the code
>