100 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)  argument
103 static inline int gro_recursion_inc_test(struct sk_buff *skb)  in gro_recursion_inc_test()  argument
105 	return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;  in gro_recursion_inc_test()
111 					       struct sk_buff *skb)
113 	if (unlikely(gro_recursion_inc_test(skb))) {
114 		NAPI_GRO_CB(skb)->flush |= 1;
118 	return cb(head, skb);
126 						  struct sk_buff *skb)
128 	if (unlikely(gro_recursion_inc_test(skb))) {
129 		NAPI_GRO_CB(skb)->flush |= 1;
133 	return cb(sk, head, skb);
136 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
138 	return NAPI_GRO_CB(skb)->data_offset;
141 static inline unsigned int skb_gro_len(const struct sk_buff *skb)  in skb_gro_len()  argument
143 	return skb->len - NAPI_GRO_CB(skb)->data_offset;  in skb_gro_len()
146 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)  in skb_gro_pull()  argument
148 	NAPI_GRO_CB(skb)->data_offset += len;  in skb_gro_pull()
151 static inline void *skb_gro_header_fast(struct sk_buff *skb,  in skb_gro_header_fast()  argument
154 	return NAPI_GRO_CB(skb)->frag0 + offset;  in skb_gro_header_fast()
157 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)  in skb_gro_header_hard()  argument
159 	return NAPI_GRO_CB(skb)->frag0_len < hlen;  in skb_gro_header_hard()
162 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)  in skb_gro_frag0_invalidate()  argument
164 	NAPI_GRO_CB(skb)->frag0 = NULL;  in skb_gro_frag0_invalidate()
165 	NAPI_GRO_CB(skb)->frag0_len = 0;  in skb_gro_frag0_invalidate()
168 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,  in skb_gro_header_slow()  argument
171 	if (!pskb_may_pull(skb, hlen))  in skb_gro_header_slow()
174 	skb_gro_frag0_invalidate(skb);  in skb_gro_header_slow()
175 	return skb->data + offset;  in skb_gro_header_slow()
178 static inline void *skb_gro_header(struct sk_buff *skb,  in skb_gro_header()  argument
183 	ptr = skb_gro_header_fast(skb, offset);  in skb_gro_header()
184 	if (skb_gro_header_hard(skb, hlen))  in skb_gro_header()
185 		ptr = skb_gro_header_slow(skb, hlen, offset);  in skb_gro_header()
189 static inline void *skb_gro_network_header(struct sk_buff *skb)  in skb_gro_network_header()  argument
191 	return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +  in skb_gro_network_header()
192 	       skb_network_offset(skb);  in skb_gro_network_header()
195 static inline __wsum inet_gro_compute_pseudo(struct sk_buff *skb, int proto)  in inet_gro_compute_pseudo()  argument
197 	const struct iphdr *iph = skb_gro_network_header(skb);  in inet_gro_compute_pseudo()
200 				  skb_gro_len(skb), proto, 0);  in inet_gro_compute_pseudo()
203 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,  in skb_gro_postpull_rcsum()  argument
206 	if (NAPI_GRO_CB(skb)->csum_valid)  in skb_gro_postpull_rcsum()
207 		NAPI_GRO_CB(skb)->csum = wsum_negate(csum_partial(start, len,  in skb_gro_postpull_rcsum()
208 						wsum_negate(NAPI_GRO_CB(skb)->csum)));  in skb_gro_postpull_rcsum()
216 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
218 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)  in skb_at_gro_remcsum_start()  argument
220 	return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));  in skb_at_gro_remcsum_start()
223 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,  in __skb_gro_checksum_validate_needed()  argument
227 	return ((skb->ip_summed != CHECKSUM_PARTIAL ||  in __skb_gro_checksum_validate_needed()
228 		skb_checksum_start_offset(skb) <  in __skb_gro_checksum_validate_needed()
229 		 skb_gro_offset(skb)) &&  in __skb_gro_checksum_validate_needed()
230 		!skb_at_gro_remcsum_start(skb) &&  in __skb_gro_checksum_validate_needed()
231 		NAPI_GRO_CB(skb)->csum_cnt == 0 &&  in __skb_gro_checksum_validate_needed()
235 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,  in __skb_gro_checksum_validate_complete()  argument
238 	if (NAPI_GRO_CB(skb)->csum_valid &&  in __skb_gro_checksum_validate_complete()
239 	    !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))  in __skb_gro_checksum_validate_complete()
242 	NAPI_GRO_CB(skb)->csum = psum;  in __skb_gro_checksum_validate_complete()
244 	return __skb_gro_checksum_complete(skb);  in __skb_gro_checksum_validate_complete()
247 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)  in skb_gro_incr_csum_unnecessary()  argument
249 	if (NAPI_GRO_CB(skb)->csum_cnt > 0) {  in skb_gro_incr_csum_unnecessary()
251 		NAPI_GRO_CB(skb)->csum_cnt--;  in skb_gro_incr_csum_unnecessary()
257 		__skb_incr_checksum_unnecessary(skb);  in skb_gro_incr_csum_unnecessary()
261 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check,	\  argument
265 	if (__skb_gro_checksum_validate_needed(skb, zero_okay, check))	\
266 		__ret = __skb_gro_checksum_validate_complete(skb,	\
267 				compute_pseudo(skb, proto));		\
269 		skb_gro_incr_csum_unnecessary(skb);			\
273 #define skb_gro_checksum_validate(skb, proto, compute_pseudo)		\  argument
274 	__skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
276 #define skb_gro_checksum_validate_zero_check(skb, proto, check,		\  argument
278 	__skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
280 #define skb_gro_checksum_simple_validate(skb)				\  argument
281 	__skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
283 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)  in __skb_gro_checksum_convert_check()  argument
285 	return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&  in __skb_gro_checksum_convert_check()
286 		!NAPI_GRO_CB(skb)->csum_valid);  in __skb_gro_checksum_convert_check()
289 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,  in __skb_gro_checksum_convert()  argument
292 	NAPI_GRO_CB(skb)->csum = ~pseudo;  in __skb_gro_checksum_convert()
293 	NAPI_GRO_CB(skb)->csum_valid = 1;  in __skb_gro_checksum_convert()
296 #define skb_gro_checksum_try_convert(skb, proto, compute_pseudo)	\  argument
298 	if (__skb_gro_checksum_convert_check(skb))			\
299 		__skb_gro_checksum_convert(skb, 			\
300 					   compute_pseudo(skb, proto));	\
314 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,  in skb_gro_remcsum_process()  argument
323 	BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);  in skb_gro_remcsum_process()
326 		NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;  in skb_gro_remcsum_process()
330 	ptr = skb_gro_header(skb, off + plen, off);  in skb_gro_remcsum_process()
334 	delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,  in skb_gro_remcsum_process()
338 	NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);  in skb_gro_remcsum_process()
346 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,  in skb_gro_remcsum_cleanup()  argument
355 	ptr = skb_gro_header(skb, plen, grc->offset);  in skb_gro_remcsum_cleanup()
363 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)  in skb_gro_flush_final()  argument
366 		NAPI_GRO_CB(skb)->flush |= flush;  in skb_gro_flush_final()
368 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,  in skb_gro_flush_final_remcsum()  argument
374 		NAPI_GRO_CB(skb)->flush |= flush;  in skb_gro_flush_final_remcsum()
375 		skb_gro_remcsum_cleanup(skb, grc);  in skb_gro_flush_final_remcsum()
376 		skb->remcsum_offload = 0;  in skb_gro_flush_final_remcsum()
380 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)  in skb_gro_flush_final()  argument
382 	NAPI_GRO_CB(skb)->flush |= flush;  in skb_gro_flush_final()
384 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,  in skb_gro_flush_final_remcsum()  argument
389 	NAPI_GRO_CB(skb)->flush |= flush;  in skb_gro_flush_final_remcsum()
390 	skb_gro_remcsum_cleanup(skb, grc);  in skb_gro_flush_final_remcsum()
391 	skb->remcsum_offload = 0;  in skb_gro_flush_final_remcsum()
410 #define indirect_call_gro_receive_inet(cb, f2, f1, head, skb)	\  argument
412 	unlikely(gro_recursion_inc_test(skb)) ?			\
413 		NAPI_GRO_CB(skb)->flush |= 1, NULL :		\
414 		INDIRECT_CALL_INET(cb, f2, f1, head, skb);	\
417 struct sk_buff *udp_gro_receive(struct list_head *head, struct sk_buff *skb,
419 int udp_gro_complete(struct sk_buff *skb, int nhoff, udp_lookup_t lookup);
421 static inline struct udphdr *udp_gro_udphdr(struct sk_buff *skb)  in udp_gro_udphdr()  argument
426 	off  = skb_gro_offset(skb);  in udp_gro_udphdr()
428 	uh   = skb_gro_header(skb, hlen, off);  in udp_gro_udphdr()
433 static inline __wsum ip6_gro_compute_pseudo(struct sk_buff *skb, int proto)  in ip6_gro_compute_pseudo()  argument
435 	const struct ipv6hdr *iph = skb_gro_network_header(skb);  in ip6_gro_compute_pseudo()
438 					    skb_gro_len(skb), proto, 0));  in ip6_gro_compute_pseudo()
441 int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
456 static inline void gro_normal_one(struct napi_struct *napi, struct sk_buff *skb, int segs)  in gro_normal_one()  argument
458 	list_add_tail(&skb->list, &napi->rx_list);  in gro_normal_one()
470 static inline void inet_get_iif_sdif(const struct sk_buff *skb, int *iif, int *sdif)  in inet_get_iif_sdif()  argument
472 	*iif = inet_iif(skb) ?: skb->dev->ifindex;  in inet_get_iif_sdif()
476 	if (netif_is_l3_slave(skb->dev)) {  in inet_get_iif_sdif()
477 		struct net_device *master = netdev_master_upper_dev_get_rcu(skb->dev);  in inet_get_iif_sdif()
491 static inline void inet6_get_iif_sdif(const struct sk_buff *skb, int *iif, int *sdif)  in inet6_get_iif_sdif()  argument
494 	*iif = skb->dev->ifindex;  in inet6_get_iif_sdif()
498 	if (netif_is_l3_slave(skb->dev)) {  in inet6_get_iif_sdif()
499 		struct net_device *master = netdev_master_upper_dev_get_rcu(skb->dev);  in inet6_get_iif_sdif()