158 				    struct sk_buff *skb, unsigned int mtu)  in ip6_finish_output_gso_slowpath_drop()  argument
191 	unsigned int mtu;  in __ip6_finish_output()  local
201 	mtu = ip6_skb_dst_mtu(skb);  in __ip6_finish_output()
202 	if (skb_is_gso(skb) && !skb_gso_validate_network_len(skb, mtu))  in __ip6_finish_output()
203 		return ip6_finish_output_gso_slowpath_drop(net, sk, skb, mtu);  in __ip6_finish_output()
205 	if ((skb->len > mtu && !skb_is_gso(skb)) ||  in __ip6_finish_output()
275 	u32 mtu;  in ip6_xmit()  local
332 	mtu = dst_mtu(dst);  in ip6_xmit()
333 	if ((skb->len <= mtu) || skb->ignore_df || skb_is_gso(skb)) {  in ip6_xmit()
356 	ipv6_local_error((struct sock *)sk, EMSGSIZE, fl6, mtu);  in ip6_xmit()
470 static bool ip6_pkt_too_big(const struct sk_buff *skb, unsigned int mtu)  in ip6_pkt_too_big()  argument
472 	if (skb->len <= mtu)  in ip6_pkt_too_big()
476 	if (IP6CB(skb)->frag_max_size && IP6CB(skb)->frag_max_size > mtu)  in ip6_pkt_too_big()
482 	if (skb_is_gso(skb) && skb_gso_validate_network_len(skb, mtu))  in ip6_pkt_too_big()
495 	u32 mtu;  in ip6_forward()  local
610 	mtu = ip6_dst_mtu_forward(dst);  in ip6_forward()
611 	if (mtu < IPV6_MIN_MTU)  in ip6_forward()
612 		mtu = IPV6_MIN_MTU;  in ip6_forward()
614 	if (ip6_pkt_too_big(skb, mtu)) {  in ip6_forward()
617 		icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);  in ip6_forward()
734 void ip6_frag_init(struct sk_buff *skb, unsigned int hlen, unsigned int mtu,  in ip6_frag_init()  argument
743 	state->mtu = mtu;  in ip6_frag_init()
764 	if (len > state->mtu)  in ip6_frag_next()
765 		len = state->mtu;  in ip6_frag_next()
839 	unsigned int mtu, hlen, nexthdr_offset;  in ip6_fragment()  local
852 	mtu = ip6_skb_dst_mtu(skb);  in ip6_fragment()
857 	if (unlikely(!skb->ignore_df && skb->len > mtu))  in ip6_fragment()
861 		if (IP6CB(skb)->frag_max_size > mtu)  in ip6_fragment()
865 		mtu = IP6CB(skb)->frag_max_size;  in ip6_fragment()
866 		if (mtu < IPV6_MIN_MTU)  in ip6_fragment()
867 			mtu = IPV6_MIN_MTU;  in ip6_fragment()
870 	if (np && np->frag_size < mtu) {  in ip6_fragment()
872 			mtu = np->frag_size;  in ip6_fragment()
874 	if (mtu < hlen + sizeof(struct frag_hdr) + 8)  in ip6_fragment()
876 	mtu -= hlen + sizeof(struct frag_hdr);  in ip6_fragment()
892 		if (first_len - hlen > mtu ||  in ip6_fragment()
900 			if (frag->len > mtu ||  in ip6_fragment()
974 	ip6_frag_init(skb, hlen, mtu, rt->dst.dev->needed_tailroom,  in ip6_fragment()
1009 	icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);  in ip6_fragment()
1355 static void ip6_append_data_mtu(unsigned int *mtu,  in ip6_append_data_mtu()  argument
1365 			*mtu = orig_mtu - rt->dst.header_len;  in ip6_append_data_mtu()
1372 			*mtu = orig_mtu;  in ip6_append_data_mtu()
1374 		*maxfraglen = ((*mtu - fragheaderlen) & ~7)  in ip6_append_data_mtu()
1384 	unsigned int mtu;  in ip6_setup_cork()  local
1430 		mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ?  in ip6_setup_cork()
1431 		      READ_ONCE(rt->dst.dev->mtu) : dst_mtu(&rt->dst);  in ip6_setup_cork()
1433 		mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ?  in ip6_setup_cork()
1434 			READ_ONCE(rt->dst.dev->mtu) : dst_mtu(xfrm_dst_path(&rt->dst));  in ip6_setup_cork()
1435 	if (np->frag_size < mtu) {  in ip6_setup_cork()
1437 			mtu = np->frag_size;  in ip6_setup_cork()
1439 	cork->base.fragsize = mtu;  in ip6_setup_cork()
1466 	unsigned int maxfraglen, fragheaderlen, mtu, orig_mtu, pmtu;  in __ip6_append_data()  local
1489 	mtu = cork->gso_size ? IP6_MAX_MTU : cork->fragsize;  in __ip6_append_data()
1490 	orig_mtu = mtu;  in __ip6_append_data()
1507 	if (mtu <= fragheaderlen ||  in __ip6_append_data()
1508 	    ((mtu - fragheaderlen) & ~7) + fragheaderlen <= sizeof(struct frag_hdr))  in __ip6_append_data()
1511 	maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen -  in __ip6_append_data()
1517 	if (headersize + transhdrlen > mtu)  in __ip6_append_data()
1520 	if (cork->length + length > mtu - headersize && ipc6->dontfrag &&  in __ip6_append_data()
1523 		ipv6_local_rxpmtu(sk, fl6, mtu - headersize +  in __ip6_append_data()
1531 		maxnonfragsize = mtu;  in __ip6_append_data()
1535 		pmtu = max_t(int, mtu - headersize + sizeof(struct ipv6hdr), 0);  in __ip6_append_data()
1545 	    length <= mtu - headersize &&  in __ip6_append_data()
1586 		copy = (cork->length <= mtu && !(cork->flags & IPCORK_ALLFRAG) ? mtu : maxfraglen) - skb->len;  in __ip6_append_data()
1605 				ip6_append_data_mtu(&mtu, &maxfraglen,  in __ip6_append_data()
1617 …if (datalen > (cork->length <= mtu && !(cork->flags & IPCORK_ALLFRAG) ? mtu : maxfraglen) - fraghe…  in __ip6_append_data()
1634 				alloclen = mtu;  in __ip6_append_data()