85 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)  argument
88 static inline int gro_recursion_inc_test(struct sk_buff *skb)  in gro_recursion_inc_test()  argument
90 	return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;  in gro_recursion_inc_test()
96 					       struct sk_buff *skb)
98 	if (unlikely(gro_recursion_inc_test(skb))) {
99 		NAPI_GRO_CB(skb)->flush |= 1;
103 	return cb(head, skb);
111 						  struct sk_buff *skb)
113 	if (unlikely(gro_recursion_inc_test(skb))) {
114 		NAPI_GRO_CB(skb)->flush |= 1;
118 	return cb(sk, head, skb);
121 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
123 	return NAPI_GRO_CB(skb)->data_offset;
126 static inline unsigned int skb_gro_len(const struct sk_buff *skb)  in skb_gro_len()  argument
128 	return skb->len - NAPI_GRO_CB(skb)->data_offset;  in skb_gro_len()
131 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)  in skb_gro_pull()  argument
133 	NAPI_GRO_CB(skb)->data_offset += len;  in skb_gro_pull()
136 static inline void *skb_gro_header_fast(struct sk_buff *skb,  in skb_gro_header_fast()  argument
139 	return NAPI_GRO_CB(skb)->frag0 + offset;  in skb_gro_header_fast()
142 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)  in skb_gro_header_hard()  argument
144 	return NAPI_GRO_CB(skb)->frag0_len < hlen;  in skb_gro_header_hard()
147 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)  in skb_gro_frag0_invalidate()  argument
149 	NAPI_GRO_CB(skb)->frag0 = NULL;  in skb_gro_frag0_invalidate()
150 	NAPI_GRO_CB(skb)->frag0_len = 0;  in skb_gro_frag0_invalidate()
153 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,  in skb_gro_header_slow()  argument
156 	if (!pskb_may_pull(skb, hlen))  in skb_gro_header_slow()
159 	skb_gro_frag0_invalidate(skb);  in skb_gro_header_slow()
160 	return skb->data + offset;  in skb_gro_header_slow()
163 static inline void *skb_gro_header(struct sk_buff *skb,  in skb_gro_header()  argument
168 	ptr = skb_gro_header_fast(skb, offset);  in skb_gro_header()
169 	if (skb_gro_header_hard(skb, hlen))  in skb_gro_header()
170 		ptr = skb_gro_header_slow(skb, hlen, offset);  in skb_gro_header()
174 static inline void *skb_gro_network_header(struct sk_buff *skb)  in skb_gro_network_header()  argument
176 	return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +  in skb_gro_network_header()
177 	       skb_network_offset(skb);  in skb_gro_network_header()
180 static inline __wsum inet_gro_compute_pseudo(struct sk_buff *skb, int proto)  in inet_gro_compute_pseudo()  argument
182 	const struct iphdr *iph = skb_gro_network_header(skb);  in inet_gro_compute_pseudo()
185 				  skb_gro_len(skb), proto, 0);  in inet_gro_compute_pseudo()
188 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,  in skb_gro_postpull_rcsum()  argument
191 	if (NAPI_GRO_CB(skb)->csum_valid)  in skb_gro_postpull_rcsum()
192 		NAPI_GRO_CB(skb)->csum = wsum_negate(csum_partial(start, len,  in skb_gro_postpull_rcsum()
193 						wsum_negate(NAPI_GRO_CB(skb)->csum)));  in skb_gro_postpull_rcsum()
201 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
203 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)  in skb_at_gro_remcsum_start()  argument
205 	return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));  in skb_at_gro_remcsum_start()
208 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,  in __skb_gro_checksum_validate_needed()  argument
212 	return ((skb->ip_summed != CHECKSUM_PARTIAL ||  in __skb_gro_checksum_validate_needed()
213 		skb_checksum_start_offset(skb) <  in __skb_gro_checksum_validate_needed()
214 		 skb_gro_offset(skb)) &&  in __skb_gro_checksum_validate_needed()
215 		!skb_at_gro_remcsum_start(skb) &&  in __skb_gro_checksum_validate_needed()
216 		NAPI_GRO_CB(skb)->csum_cnt == 0 &&  in __skb_gro_checksum_validate_needed()
220 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,  in __skb_gro_checksum_validate_complete()  argument
223 	if (NAPI_GRO_CB(skb)->csum_valid &&  in __skb_gro_checksum_validate_complete()
224 	    !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))  in __skb_gro_checksum_validate_complete()
227 	NAPI_GRO_CB(skb)->csum = psum;  in __skb_gro_checksum_validate_complete()
229 	return __skb_gro_checksum_complete(skb);  in __skb_gro_checksum_validate_complete()
232 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)  in skb_gro_incr_csum_unnecessary()  argument
234 	if (NAPI_GRO_CB(skb)->csum_cnt > 0) {  in skb_gro_incr_csum_unnecessary()
236 		NAPI_GRO_CB(skb)->csum_cnt--;  in skb_gro_incr_csum_unnecessary()
242 		__skb_incr_checksum_unnecessary(skb);  in skb_gro_incr_csum_unnecessary()
246 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check,	\  argument
250 	if (__skb_gro_checksum_validate_needed(skb, zero_okay, check))	\
251 		__ret = __skb_gro_checksum_validate_complete(skb,	\
252 				compute_pseudo(skb, proto));		\
254 		skb_gro_incr_csum_unnecessary(skb);			\
258 #define skb_gro_checksum_validate(skb, proto, compute_pseudo)		\  argument
259 	__skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
261 #define skb_gro_checksum_validate_zero_check(skb, proto, check,		\  argument
263 	__skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
265 #define skb_gro_checksum_simple_validate(skb)				\  argument
266 	__skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
268 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)  in __skb_gro_checksum_convert_check()  argument
270 	return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&  in __skb_gro_checksum_convert_check()
271 		!NAPI_GRO_CB(skb)->csum_valid);  in __skb_gro_checksum_convert_check()
274 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,  in __skb_gro_checksum_convert()  argument
277 	NAPI_GRO_CB(skb)->csum = ~pseudo;  in __skb_gro_checksum_convert()
278 	NAPI_GRO_CB(skb)->csum_valid = 1;  in __skb_gro_checksum_convert()
281 #define skb_gro_checksum_try_convert(skb, proto, compute_pseudo)	\  argument
283 	if (__skb_gro_checksum_convert_check(skb))			\
284 		__skb_gro_checksum_convert(skb, 			\
285 					   compute_pseudo(skb, proto));	\
299 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,  in skb_gro_remcsum_process()  argument
308 	BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);  in skb_gro_remcsum_process()
311 		NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;  in skb_gro_remcsum_process()
315 	ptr = skb_gro_header(skb, off + plen, off);  in skb_gro_remcsum_process()
319 	delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,  in skb_gro_remcsum_process()
323 	NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);  in skb_gro_remcsum_process()
331 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,  in skb_gro_remcsum_cleanup()  argument
340 	ptr = skb_gro_header(skb, plen, grc->offset);  in skb_gro_remcsum_cleanup()
348 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)  in skb_gro_flush_final()  argument
351 		NAPI_GRO_CB(skb)->flush |= flush;  in skb_gro_flush_final()
353 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,  in skb_gro_flush_final_remcsum()  argument
359 		NAPI_GRO_CB(skb)->flush |= flush;  in skb_gro_flush_final_remcsum()
360 		skb_gro_remcsum_cleanup(skb, grc);  in skb_gro_flush_final_remcsum()
361 		skb->remcsum_offload = 0;  in skb_gro_flush_final_remcsum()
365 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)  in skb_gro_flush_final()  argument
367 	NAPI_GRO_CB(skb)->flush |= flush;  in skb_gro_flush_final()
369 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()
395 #define indirect_call_gro_receive_inet(cb, f2, f1, head, skb)	\  argument
397 	unlikely(gro_recursion_inc_test(skb)) ?			\
398 		NAPI_GRO_CB(skb)->flush |= 1, NULL :		\
399 		INDIRECT_CALL_INET(cb, f2, f1, head, skb);	\
402 struct sk_buff *udp_gro_receive(struct list_head *head, struct sk_buff *skb,
404 int udp_gro_complete(struct sk_buff *skb, int nhoff, udp_lookup_t lookup);
406 static inline struct udphdr *udp_gro_udphdr(struct sk_buff *skb)  in udp_gro_udphdr()  argument
411 	off  = skb_gro_offset(skb);  in udp_gro_udphdr()
413 	uh   = skb_gro_header(skb, hlen, off);  in udp_gro_udphdr()
418 static inline __wsum ip6_gro_compute_pseudo(struct sk_buff *skb, int proto)  in ip6_gro_compute_pseudo()  argument
420 	const struct ipv6hdr *iph = skb_gro_network_header(skb);  in ip6_gro_compute_pseudo()
423 					    skb_gro_len(skb), proto, 0));  in ip6_gro_compute_pseudo()
426 int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
441 static inline void gro_normal_one(struct napi_struct *napi, struct sk_buff *skb, int segs)  in gro_normal_one()  argument
443 	list_add_tail(&skb->list, &napi->rx_list);  in gro_normal_one()