23 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,  in xfrm6_find_1stfragopt()  argument
26 	return ip6_find_1stfragopt(skb, prevhdr);  in xfrm6_find_1stfragopt()
30 static int xfrm6_local_dontfrag(struct sk_buff *skb)  in xfrm6_local_dontfrag()  argument
33 	struct sock *sk = skb->sk;  in xfrm6_local_dontfrag()
47 static void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu)  in xfrm6_local_rxpmtu()  argument
50 	struct sock *sk = skb->sk;  in xfrm6_local_rxpmtu()
53 	fl6.daddr = ipv6_hdr(skb)->daddr;  in xfrm6_local_rxpmtu()
58 void xfrm6_local_error(struct sk_buff *skb, u32 mtu)  in xfrm6_local_error()  argument
62 	struct sock *sk = skb->sk;  in xfrm6_local_error()
64 	hdr = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb);  in xfrm6_local_error()
71 static int xfrm6_tunnel_check_size(struct sk_buff *skb)  in xfrm6_tunnel_check_size()  argument
74 	struct dst_entry *dst = skb_dst(skb);  in xfrm6_tunnel_check_size()
80 	if (!skb->ignore_df && skb->len > mtu) {  in xfrm6_tunnel_check_size()
81 		skb->dev = dst->dev;  in xfrm6_tunnel_check_size()
82 		skb->protocol = htons(ETH_P_IPV6);  in xfrm6_tunnel_check_size()
84 		if (xfrm6_local_dontfrag(skb))  in xfrm6_tunnel_check_size()
85 			xfrm6_local_rxpmtu(skb, mtu);  in xfrm6_tunnel_check_size()
86 		else if (skb->sk)  in xfrm6_tunnel_check_size()
87 			xfrm_local_error(skb, mtu);  in xfrm6_tunnel_check_size()
89 			icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);  in xfrm6_tunnel_check_size()
96 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb)  in xfrm6_extract_output()  argument
100 	err = xfrm6_tunnel_check_size(skb);  in xfrm6_extract_output()
104 	XFRM_MODE_SKB_CB(skb)->protocol = ipv6_hdr(skb)->nexthdr;  in xfrm6_extract_output()
106 	return xfrm6_extract_header(skb);  in xfrm6_extract_output()
109 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb)  in xfrm6_prepare_output()  argument
113 	err = xfrm_inner_extract_output(x, skb);  in xfrm6_prepare_output()
117 	skb->ignore_df = 1;  in xfrm6_prepare_output()
118 	skb->protocol = htons(ETH_P_IPV6);  in xfrm6_prepare_output()
120 	return x->outer_mode->output2(x, skb);  in xfrm6_prepare_output()
124 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb)  in xfrm6_output_finish()  argument
126 	memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));  in xfrm6_output_finish()
129 	IP6CB(skb)->flags |= IP6SKB_XFRM_TRANSFORMED;  in xfrm6_output_finish()
132 	return xfrm_output(sk, skb);  in xfrm6_output_finish()
135 static int __xfrm6_output_finish(struct net *net, struct sock *sk, struct sk_buff *skb)  in __xfrm6_output_finish()  argument
137 	struct xfrm_state *x = skb_dst(skb)->xfrm;  in __xfrm6_output_finish()
139 	return x->outer_mode->afinfo->output_finish(sk, skb);  in __xfrm6_output_finish()
142 static int __xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb)  in __xfrm6_output()  argument
144 	struct dst_entry *dst = skb_dst(skb);  in __xfrm6_output()
151 		IP6CB(skb)->flags |= IP6SKB_REROUTED;  in __xfrm6_output()
152 		return dst_output(net, sk, skb);  in __xfrm6_output()
159 	if (skb->protocol == htons(ETH_P_IPV6))  in __xfrm6_output()
160 		mtu = ip6_skb_dst_mtu(skb);  in __xfrm6_output()
162 		mtu = dst_mtu(skb_dst(skb));  in __xfrm6_output()
164 	toobig = skb->len > mtu && !skb_is_gso(skb);  in __xfrm6_output()
166 	if (toobig && xfrm6_local_dontfrag(skb)) {  in __xfrm6_output()
167 		xfrm6_local_rxpmtu(skb, mtu);  in __xfrm6_output()
169 	} else if (!skb->ignore_df && toobig && skb->sk) {  in __xfrm6_output()
170 		xfrm_local_error(skb, mtu);  in __xfrm6_output()
174 	if (toobig || dst_allfrag(skb_dst(skb)))  in __xfrm6_output()
175 		return ip6_fragment(net, sk, skb,  in __xfrm6_output()
179 	return x->outer_mode->afinfo->output_finish(sk, skb);  in __xfrm6_output()
182 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb)  in xfrm6_output()  argument
185 			    net, sk, skb,  NULL, skb_dst(skb)->dev,  in xfrm6_output()
187 			    !(IP6CB(skb)->flags & IP6SKB_REROUTED));  in xfrm6_output()