XFRMA_POLICY
[XFRMA_POLICY] = { .len = XMSGSIZE(compat_xfrm_userpolicy_info)},
case XFRMA_POLICY:
if (attrs[XFRMA_POLICY])
[XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));