88 	    unsigned int mtu,
243 				struct sk_buff *skb, unsigned int mtu)  in ip_finish_output_gso()  argument
249 	/* common case: seglen is <= mtu  in ip_finish_output_gso()
251 	if (skb_gso_validate_network_len(skb, mtu))  in ip_finish_output_gso()
254 	/* Slowpath -  GSO segment length exceeds the egress MTU.  in ip_finish_output_gso()
262 	 *    interface with a smaller MTU.  in ip_finish_output_gso()
265 	 *    insufficent MTU.  in ip_finish_output_gso()
281 		err = ip_fragment(net, sk, segs, mtu, ip_finish_output2);  in ip_finish_output_gso()
292 	unsigned int mtu;  in __ip_finish_output()  local
301 	mtu = ip_skb_dst_mtu(sk, skb);  in __ip_finish_output()
303 		return ip_finish_output_gso(net, sk, skb, mtu);  in __ip_finish_output()
305 	if (skb->len > mtu || (IPCB(skb)->flags & IPSKB_FRAG_PMTU))  in __ip_finish_output()
306 		return ip_fragment(net, sk, skb, mtu, ip_finish_output2);  in __ip_finish_output()
575 		       unsigned int mtu,  in ip_fragment()  argument
585 		      IPCB(skb)->frag_max_size > mtu))) {  in ip_fragment()
588 			  htonl(mtu));  in ip_fragment()
654 		  unsigned int ll_rs, unsigned int mtu, bool DF,  in ip_frag_init()  argument
662 	state->mtu = mtu;  in ip_frag_init()
695 	/* IF: it doesn't fit, use 'mtu' - the data space left */  in ip_frag_next()
696 	if (len > state->mtu)  in ip_frag_next()
697 		len = state->mtu;  in ip_frag_next()
778 	unsigned int mtu, hlen, ll_rs;  in ip_do_fragment()  local
795 	mtu = ip_skb_dst_mtu(sk, skb);  in ip_do_fragment()
796 	if (IPCB(skb)->frag_max_size && IPCB(skb)->frag_max_size < mtu)  in ip_do_fragment()
797 		mtu = IPCB(skb)->frag_max_size;  in ip_do_fragment()
804 	mtu = mtu - hlen;	/* Size of data space */  in ip_do_fragment()
819 		if (first_len - hlen > mtu ||  in ip_do_fragment()
828 			if (frag->len > mtu ||  in ip_do_fragment()
892 	ip_frag_init(skb, hlen, ll_rs, mtu, IPCB(skb)->flags & IPSKB_FRAG_PMTU,  in ip_do_fragment()
976 	int mtu;  in __ip_append_data()  local
990 	mtu = cork->gso_size ? IP_MAX_MTU : cork->fragsize;  in __ip_append_data()
1000 	maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen;  in __ip_append_data()
1001 	maxnonfragsize = ip_sk_ignore_df(sk) ? IP_MAX_MTU : mtu;  in __ip_append_data()
1005 			       mtu - (opt ? opt->optlen : 0));  in __ip_append_data()
1014 	    length + fragheaderlen <= mtu &&  in __ip_append_data()
1048 		copy = mtu - skb->len;  in __ip_append_data()
1067 			 * If remaining data exceeds the mtu,  in __ip_append_data()
1071 			if (datalen > mtu - fragheaderlen)  in __ip_append_data()
1078 				alloclen = mtu;  in __ip_append_data()
1268 			 dst_mtu(&rt->dst) : READ_ONCE(rt->dst.dev->mtu);  in ip_setup_cork()
1337 	int mtu;  in ip_append_page()  local
1360 	mtu = cork->gso_size ? IP_MAX_MTU : cork->fragsize;  in ip_append_page()
1363 	maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen;  in ip_append_page()
1364 	maxnonfragsize = ip_sk_ignore_df(sk) ? 0xFFFF : mtu;  in ip_append_page()
1368 			       mtu - (opt ? opt->optlen : 0));  in ip_append_page()
1380 		len = mtu - skb->len;  in ip_append_page()