ENC_OPTS_BITS
value = tun_id << ENC_OPTS_BITS | enc_opts_id;
u32 tun_id = flow->attr->tunnel_id >> ENC_OPTS_BITS;
tun_id = tunnel_id >> ENC_OPTS_BITS;
#define ENC_OPTS_BITS_MASK GENMASK(ENC_OPTS_BITS - 1, 0)
#define TUNNEL_ID_BITS (TUNNEL_INFO_BITS + ENC_OPTS_BITS)