[PATCH nf-next] net: pass net_device_path_ctx to dev_fill_forward_path()

[Simon Horman]

On Wed, Aug 05, 2026 at 10:53:09AM +0200, Lorenzo Bianconi wrote:
> Refactor dev_fill_forward_path() to take a struct net_device_path_ctx
> pointer instead of a (dev, daddr) pair, so the caller can build and
> populate the context up front and keep it after the forward path walk.
> 
> This allows additional fields (e.g. vlan and ether_type) to be carried
> in the context and shared with ndo_fill_forward_path implementations,
> instead of being reconstructed on the stack inside the core helper.
> 
> Update the mtk_ppe_offload, airoha_ppe and nf_flow_table_path callers to
> allocate and fill the context before invoking dev_fill_forward_path().
> The network topology resolution behaviour is unchanged.
> 
> This is a preliminary patch to enable HW flowtable offload for IPv4
> over IPv6 tunnels.
> 
> Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi at oss.qualcomm.com>

Reviewed-by: Simon Horman <horms at kernel.org>