143 					   struct sk_buff *skb, u32 mtu,
164 	.mtu =			ipv4_mtu,
1036 static void __ip_rt_update_pmtu(struct rtable *rt, struct flowi4 *fl4, u32 mtu)  in __ip_rt_update_pmtu()  argument
1047 	if (old_mtu < mtu)  in __ip_rt_update_pmtu()
1050 	if (mtu < ip_rt_min_pmtu) {  in __ip_rt_update_pmtu()
1052 		mtu = min(old_mtu, ip_rt_min_pmtu);  in __ip_rt_update_pmtu()
1055 	if (rt->rt_pmtu == mtu && !lock &&  in __ip_rt_update_pmtu()
1065 		update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock,  in __ip_rt_update_pmtu()
1072 			      struct sk_buff *skb, u32 mtu,  in ip_rt_update_pmtu()  argument
1079 	__ip_rt_update_pmtu(rt, &fl4, mtu);  in ip_rt_update_pmtu()
1082 void ipv4_update_pmtu(struct sk_buff *skb, struct net *net, u32 mtu,  in ipv4_update_pmtu()  argument
1094 		__ip_rt_update_pmtu(rt, &fl4, mtu);  in ipv4_update_pmtu()
1100 static void __ipv4_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, u32 mtu)  in __ipv4_sk_update_pmtu()  argument
1113 		__ip_rt_update_pmtu(rt, &fl4, mtu);  in __ipv4_sk_update_pmtu()
1118 void ipv4_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, u32 mtu)  in ipv4_sk_update_pmtu()  argument
1135 		__ipv4_sk_update_pmtu(skb, sk, mtu);  in ipv4_sk_update_pmtu()
1150 	__ip_rt_update_pmtu((struct rtable *) xfrm_dst_path(&rt->dst), &fl4, mtu);  in ipv4_sk_update_pmtu()
1334 	unsigned int mtu = rt->rt_pmtu;  in ipv4_mtu()  local
1336 	if (!mtu || time_after_eq(jiffies, rt->dst.expires))  in ipv4_mtu()
1337 		mtu = dst_metric_raw(dst, RTAX_MTU);  in ipv4_mtu()
1339 	if (mtu)  in ipv4_mtu()
1342 	mtu = READ_ONCE(dst->dev->mtu);  in ipv4_mtu()
1345 		if (rt->rt_uses_gateway && mtu > 576)  in ipv4_mtu()
1346 			mtu = 576;  in ipv4_mtu()
1350 	mtu = min_t(unsigned int, mtu, IP_MAX_MTU);  in ipv4_mtu()
1352 	return mtu - lwtunnel_headroom(dst->lwtstate, mtu);  in ipv4_mtu()
1426 	u32 mtu = 0;  in ip_mtu_from_fib_result()  local
1430 		mtu = fi->fib_mtu;  in ip_mtu_from_fib_result()
1432 	if (likely(!mtu)) {  in ip_mtu_from_fib_result()
1437 			mtu = fnhe->fnhe_pmtu;  in ip_mtu_from_fib_result()
1440 	if (likely(!mtu))  in ip_mtu_from_fib_result()
1441 		mtu = min(READ_ONCE(dev->mtu), IP_MAX_MTU);  in ip_mtu_from_fib_result()
1443 	return mtu - lwtunnel_headroom(nhc->nhc_lwtstate, mtu);  in ip_mtu_from_fib_result()
2675 	unsigned int mtu = dst_metric_raw(dst, RTAX_MTU);  in ipv4_blackhole_mtu()  local
2677 	return mtu ? : dst->dev->mtu;  in ipv4_blackhole_mtu()
2681 					  struct sk_buff *skb, u32 mtu,  in ipv4_rt_blackhole_update_pmtu()  argument
2700 	.mtu			=	ipv4_blackhole_mtu,