Lines Matching refs:mtu
202 unsigned int mtu; member
210 unsigned int mtu, bool DF, struct ip_frag_state *state);
470 unsigned int mtu, res; in ip_dst_mtu_maybe_forward() local
479 mtu = rt->rt_pmtu; in ip_dst_mtu_maybe_forward()
480 if (mtu && time_before(jiffies, READ_ONCE(rt->dst.expires))) in ip_dst_mtu_maybe_forward()
485 mtu = dst_metric_raw(dst, RTAX_MTU); in ip_dst_mtu_maybe_forward()
486 if (mtu) in ip_dst_mtu_maybe_forward()
489 mtu = READ_ONCE(dst_dev(dst)->mtu); in ip_dst_mtu_maybe_forward()
492 if (rt->rt_uses_gateway && mtu > 576) in ip_dst_mtu_maybe_forward()
493 mtu = 576; in ip_dst_mtu_maybe_forward()
497 mtu = min_t(unsigned int, mtu, IP_MAX_MTU); in ip_dst_mtu_maybe_forward()
499 res = mtu - lwtunnel_headroom(dst->lwtstate, mtu); in ip_dst_mtu_maybe_forward()
510 unsigned int mtu; in ip_skb_dst_mtu() local
518 mtu = min(READ_ONCE(dst_dev(dst)->mtu), IP_MAX_MTU); in ip_skb_dst_mtu()
519 return mtu - lwtunnel_headroom(dst->lwtstate, mtu); in ip_skb_dst_mtu()
833 static inline bool inetdev_valid_mtu(unsigned int mtu) in inetdev_valid_mtu() argument
835 return likely(mtu >= IPV4_MIN_MTU); in inetdev_valid_mtu()