net_dm_drop_point
struct net_dm_drop_point points[];
al += dm_hit_limit * sizeof(struct net_dm_drop_point);
struct net_dm_drop_point *point;
__nla_reserve_nohdr(dskb, sizeof(struct net_dm_drop_point));
nla->nla_len += NLA_ALIGN(sizeof(struct net_dm_drop_point));