This new argument will be used in the next patches for the eth_get_headlen use case. eth_get_headlen calls flow dissector with only data (without skb) so there is currently no way to pull attached BPF flow dissector program. With this new argument, we can amend the callers to explicitly pass network namespace so we can use attached BPF program. Change-Id: I07dbe25c77a13f8cc33b037e63c532979d290ad0 Signed-off-by: Stanislav Fomichev <sdf@google.com> Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Naveen <133593113+elohim-etz@users.noreply.github.com>