Lines Matching defs:mtu
198 unsigned int mtu;
206 unsigned int mtu, bool DF, struct ip_frag_state *state);
457 unsigned int mtu;
462 mtu = rt->rt_pmtu;
463 if (mtu && time_before(jiffies, rt->dst.expires))
467 /* 'forwarding = true' case should always honour route mtu */
468 mtu = dst_metric_raw(dst, RTAX_MTU);
469 if (mtu)
472 mtu = READ_ONCE(dst->dev->mtu);
475 if (rt->rt_uses_gateway && mtu > 576)
476 mtu = 576;
480 mtu = min_t(unsigned int, mtu, IP_MAX_MTU);
482 return mtu - lwtunnel_headroom(dst->lwtstate, mtu);
488 unsigned int mtu;
496 mtu = min(READ_ONCE(skb_dst(skb)->dev->mtu), IP_MAX_MTU);
497 return mtu - lwtunnel_headroom(skb_dst(skb)->lwtstate, mtu);
800 static inline bool inetdev_valid_mtu(unsigned int mtu)
802 return likely(mtu >= IPV4_MIN_MTU);