Lines Matching refs:mtu
194 unsigned int mtu; member
202 unsigned int mtu, bool DF, struct ip_frag_state *state);
446 unsigned int mtu; in ip_dst_mtu_maybe_forward() local
451 mtu = rt->rt_pmtu; in ip_dst_mtu_maybe_forward()
452 if (mtu && time_before(jiffies, rt->dst.expires)) in ip_dst_mtu_maybe_forward()
457 mtu = dst_metric_raw(dst, RTAX_MTU); in ip_dst_mtu_maybe_forward()
458 if (mtu) in ip_dst_mtu_maybe_forward()
461 mtu = READ_ONCE(dst->dev->mtu); in ip_dst_mtu_maybe_forward()
464 if (rt->rt_uses_gateway && mtu > 576) in ip_dst_mtu_maybe_forward()
465 mtu = 576; in ip_dst_mtu_maybe_forward()
469 mtu = min_t(unsigned int, mtu, IP_MAX_MTU); in ip_dst_mtu_maybe_forward()
471 return mtu - lwtunnel_headroom(dst->lwtstate, mtu); in ip_dst_mtu_maybe_forward()
477 unsigned int mtu; in ip_skb_dst_mtu() local
485 mtu = min(READ_ONCE(skb_dst(skb)->dev->mtu), IP_MAX_MTU); in ip_skb_dst_mtu()
486 return mtu - lwtunnel_headroom(skb_dst(skb)->lwtstate, mtu); in ip_skb_dst_mtu()
784 static inline bool inetdev_valid_mtu(unsigned int mtu) in inetdev_valid_mtu() argument
786 return likely(mtu >= IPV4_MIN_MTU); in inetdev_valid_mtu()