88 	    unsigned int mtu,
234 				struct sk_buff *skb, unsigned int mtu)  in ip_finish_output_gso()  argument
240 	/* common case: seglen is <= mtu  in ip_finish_output_gso()
242 	if (skb_gso_validate_network_len(skb, mtu))  in ip_finish_output_gso()
245 	/* Slowpath -  GSO segment length exceeds the egress MTU.  in ip_finish_output_gso()
253 	 *    interface with a smaller MTU.  in ip_finish_output_gso()
256 	 *    insufficient MTU.  in ip_finish_output_gso()
272 		err = ip_fragment(net, sk, segs, mtu, ip_finish_output2);  in ip_finish_output_gso()
283 	unsigned int mtu;  in __ip_finish_output()  local
292 	mtu = ip_skb_dst_mtu(sk, skb);  in __ip_finish_output()
294 		return ip_finish_output_gso(net, sk, skb, mtu);  in __ip_finish_output()
296 	if (skb->len > mtu || IPCB(skb)->frag_max_size)  in __ip_finish_output()
297 		return ip_fragment(net, sk, skb, mtu, ip_finish_output2);  in __ip_finish_output()
568 		       unsigned int mtu,  in ip_fragment()  argument
578 		      IPCB(skb)->frag_max_size > mtu))) {  in ip_fragment()
581 			  htonl(mtu));  in ip_fragment()
635 		  unsigned int ll_rs, unsigned int mtu, bool DF,  in ip_frag_init()  argument
643 	state->mtu = mtu;  in ip_frag_init()
676 	/* IF: it doesn't fit, use 'mtu' - the data space left */  in ip_frag_next()
677 	if (len > state->mtu)  in ip_frag_next()
678 		len = state->mtu;  in ip_frag_next()
759 	unsigned int mtu, hlen, ll_rs;  in ip_do_fragment()  local
776 	mtu = ip_skb_dst_mtu(sk, skb);  in ip_do_fragment()
777 	if (IPCB(skb)->frag_max_size && IPCB(skb)->frag_max_size < mtu)  in ip_do_fragment()
778 		mtu = IPCB(skb)->frag_max_size;  in ip_do_fragment()
785 	mtu = mtu - hlen;	/* Size of data space */  in ip_do_fragment()
800 		if (first_len - hlen > mtu ||  in ip_do_fragment()
809 			if (frag->len > mtu ||  in ip_do_fragment()
876 	ip_frag_init(skb, hlen, ll_rs, mtu, IPCB(skb)->flags & IPSKB_FRAG_PMTU,  in ip_do_fragment()
960 	int mtu;  in __ip_append_data()  local
974 	mtu = cork->gso_size ? IP_MAX_MTU : cork->fragsize;  in __ip_append_data()
984 	maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen;  in __ip_append_data()
985 	maxnonfragsize = ip_sk_ignore_df(sk) ? IP_MAX_MTU : mtu;  in __ip_append_data()
989 			       mtu - (opt ? opt->optlen : 0));  in __ip_append_data()
998 	    length + fragheaderlen <= mtu &&  in __ip_append_data()
1032 		copy = mtu - skb->len;  in __ip_append_data()
1051 			 * If remaining data exceeds the mtu,  in __ip_append_data()
1055 			if (datalen > mtu - fragheaderlen)  in __ip_append_data()
1073 				alloclen = mtu;  in __ip_append_data()
1255 			 dst_mtu(&rt->dst) : READ_ONCE(rt->dst.dev->mtu);  in ip_setup_cork()
1324 	int mtu;  in ip_append_page()  local
1347 	mtu = cork->gso_size ? IP_MAX_MTU : cork->fragsize;  in ip_append_page()
1350 	maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen;  in ip_append_page()
1351 	maxnonfragsize = ip_sk_ignore_df(sk) ? 0xFFFF : mtu;  in ip_append_page()
1355 			       mtu - (opt ? opt->optlen : 0));  in ip_append_page()
1367 		len = mtu - skb->len;  in ip_append_page()