13 struct sk_buff *skb_eth_gso_segment(struct sk_buff *skb,  in skb_eth_gso_segment()  argument
22 			segs = ptype->callbacks.gso_segment(skb, features);  in skb_eth_gso_segment()
37 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,  in skb_mac_gso_segment()  argument
42 	int vlan_depth = skb->mac_len;  in skb_mac_gso_segment()
43 	__be16 type = skb_network_protocol(skb, &vlan_depth);  in skb_mac_gso_segment()
48 	__skb_pull(skb, vlan_depth);  in skb_mac_gso_segment()
53 			segs = ptype->callbacks.gso_segment(skb, features);  in skb_mac_gso_segment()
59 	__skb_push(skb, skb->data - skb_mac_header(skb));  in skb_mac_gso_segment()
66 static bool skb_needs_check(const struct sk_buff *skb, bool tx_path)  in skb_needs_check()  argument
69 		return skb->ip_summed != CHECKSUM_PARTIAL &&  in skb_needs_check()
70 		       skb->ip_summed != CHECKSUM_UNNECESSARY;  in skb_needs_check()
72 	return skb->ip_summed == CHECKSUM_NONE;  in skb_needs_check()
88 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,  in __skb_gso_segment()  argument
93 	if (unlikely(skb_needs_check(skb, tx_path))) {  in __skb_gso_segment()
97 		err = skb_cow_head(skb, 0);  in __skb_gso_segment()
108 		struct net_device *dev = skb->dev;  in __skb_gso_segment()
111 		if (!skb_gso_ok(skb, features | partial_features))  in __skb_gso_segment()
116 		     sizeof(*SKB_GSO_CB(skb)) > sizeof(skb->cb));  in __skb_gso_segment()
118 	SKB_GSO_CB(skb)->mac_offset = skb_headroom(skb);  in __skb_gso_segment()
119 	SKB_GSO_CB(skb)->encap_level = 0;  in __skb_gso_segment()
121 	skb_reset_mac_header(skb);  in __skb_gso_segment()
122 	skb_reset_mac_len(skb);  in __skb_gso_segment()
124 	segs = skb_mac_gso_segment(skb, features);  in __skb_gso_segment()
126 	if (segs != skb && unlikely(skb_needs_check(skb, tx_path) && !IS_ERR(segs)))  in __skb_gso_segment()
127 		skb_warn_bad_offload(skb);  in __skb_gso_segment()
143 static unsigned int skb_gso_transport_seglen(const struct sk_buff *skb)  in skb_gso_transport_seglen()  argument
145 	const struct skb_shared_info *shinfo = skb_shinfo(skb);  in skb_gso_transport_seglen()
148 	if (skb->encapsulation) {  in skb_gso_transport_seglen()
149 		thlen = skb_inner_transport_header(skb) -  in skb_gso_transport_seglen()
150 			skb_transport_header(skb);  in skb_gso_transport_seglen()
153 			thlen += inner_tcp_hdrlen(skb);  in skb_gso_transport_seglen()
155 		thlen = tcp_hdrlen(skb);  in skb_gso_transport_seglen()
156 	} else if (unlikely(skb_is_gso_sctp(skb))) {  in skb_gso_transport_seglen()
178 static unsigned int skb_gso_network_seglen(const struct sk_buff *skb)  in skb_gso_network_seglen()  argument
180 	unsigned int hdr_len = skb_transport_header(skb) -  in skb_gso_network_seglen()
181 			       skb_network_header(skb);  in skb_gso_network_seglen()
183 	return hdr_len + skb_gso_transport_seglen(skb);  in skb_gso_network_seglen()
195 static unsigned int skb_gso_mac_seglen(const struct sk_buff *skb)  in skb_gso_mac_seglen()  argument
197 	unsigned int hdr_len = skb_transport_header(skb) - skb_mac_header(skb);  in skb_gso_mac_seglen()
199 	return hdr_len + skb_gso_transport_seglen(skb);  in skb_gso_mac_seglen()
223 static inline bool skb_gso_size_check(const struct sk_buff *skb,  in skb_gso_size_check()  argument
226 	const struct skb_shared_info *shinfo = skb_shinfo(skb);  in skb_gso_size_check()
235 	skb_walk_frags(skb, iter) {  in skb_gso_size_check()
253 bool skb_gso_validate_network_len(const struct sk_buff *skb, unsigned int mtu)  in skb_gso_validate_network_len()  argument
255 	return skb_gso_size_check(skb, skb_gso_network_seglen(skb), mtu);  in skb_gso_validate_network_len()
268 bool skb_gso_validate_mac_len(const struct sk_buff *skb, unsigned int len)  in skb_gso_validate_mac_len()  argument
270 	return skb_gso_size_check(skb, skb_gso_mac_seglen(skb), len);  in skb_gso_validate_mac_len()