BPF_F_PRESERVE_ELEMS
if (map->map_flags & BPF_F_PRESERVE_ELEMS)
if (map->map_flags & BPF_F_PRESERVE_ELEMS)
BPF_F_PRESERVE_ELEMS | BPF_F_INNER_MAP)
attr->map_flags & BPF_F_PRESERVE_ELEMS)
__uint(map_flags, BPF_F_PRESERVE_ELEMS);
__uint(map_flags, BPF_F_PRESERVE_ELEMS);