174 	       skb->dst->dev->mtu : dst_mtu(skb->dst);  in ip6_skb_dst_mtu()
209 	u32 mtu;  in ip6_xmit()  local
276 	mtu = dst_mtu(dst);  in ip6_xmit()
277 	if ((skb->len <= mtu) || skb->local_df || skb_is_gso(skb)) {  in ip6_xmit()
287 	icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, skb->dev);  in ip6_xmit()
630 	unsigned int mtu, hlen, left, len;  in ip6_fragment()  local
639 	mtu = ip6_skb_dst_mtu(skb);  in ip6_fragment()
647 		icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, skb->dev);  in ip6_fragment()
654 	if (np && np->frag_size < mtu) {  in ip6_fragment()
656 			mtu = np->frag_size;  in ip6_fragment()
658 	mtu -= hlen + sizeof(struct frag_hdr);  in ip6_fragment()
664 		if (first_len - hlen > mtu ||  in ip6_fragment()
671 			if (frag->len > mtu ||  in ip6_fragment()
798 		if (len > mtu)  in ip6_fragment()
799 			len = mtu;  in ip6_fragment()
1051 			int transhdrlen, int mtu,unsigned int flags)  in ip6_ufo_append_data()  argument
1091 		skb_shinfo(skb)->gso_size = mtu - fragheaderlen -  in ip6_ufo_append_data()
1132 	int mtu;  in ip6_append_data()  local
1183 		mtu = np->pmtudisc == IPV6_PMTUDISC_PROBE ?  in ip6_append_data()
1184 		      rt->u.dst.dev->mtu : dst_mtu(rt->u.dst.path);  in ip6_append_data()
1185 		if (np->frag_size < mtu) {  in ip6_append_data()
1187 				mtu = np->frag_size;  in ip6_append_data()
1189 		inet->cork.fragsize = mtu;  in ip6_append_data()
1205 		mtu = inet->cork.fragsize;  in ip6_append_data()
1212 	maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen - sizeof(struct frag_hdr);  in ip6_append_data()
1214 	if (mtu <= sizeof(struct ipv6hdr) + IPV6_MAXPLEN) {  in ip6_append_data()
1216 			ipv6_local_error(sk, EMSGSIZE, fl, mtu-exthdrlen);  in ip6_append_data()
1238 	if (((length > mtu) && (sk->sk_protocol == IPPROTO_UDP)) &&  in ip6_append_data()
1242 					  fragheaderlen, transhdrlen, mtu,  in ip6_append_data()
1254 …copy = (inet->cork.length <= mtu && !(inet->cork.flags & IPCORK_ALLFRAG) ? mtu : maxfraglen) - skb…  in ip6_append_data()
1279 …if (datalen > (inet->cork.length <= mtu && !(inet->cork.flags & IPCORK_ALLFRAG) ? mtu : maxfraglen…  in ip6_append_data()
1285 				alloclen = mtu;  in ip6_append_data()