Lines Matching +full:hw +full:- +full:gro
1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * IPV4 GSO/GRO offload support
10 #include <net/gro.h>
22 int tnl_hlen = skb_inner_mac_header(skb) - skb_transport_header(skb); in __skb_udp_tunnel_segment()
24 struct sk_buff *segs = ERR_PTR(-EINVAL); in __skb_udp_tunnel_segment()
26 u16 mac_offset = skb->mac_header; in __skb_udp_tunnel_segment()
27 __be16 protocol = skb->protocol; in __skb_udp_tunnel_segment()
28 u16 mac_len = skb->mac_len; in __skb_udp_tunnel_segment()
37 * We cannot rely on the value contained in uh->len as it is in __skb_udp_tunnel_segment()
40 * IP or IPv6 frame that was already limited to 64K - 1. in __skb_udp_tunnel_segment()
42 if (skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) in __skb_udp_tunnel_segment()
43 partial = (__force __wsum)uh->len; in __skb_udp_tunnel_segment()
45 partial = (__force __wsum)htonl(skb->len); in __skb_udp_tunnel_segment()
46 partial = csum_sub(csum_unfold(uh->check), partial); in __skb_udp_tunnel_segment()
49 skb->encapsulation = 0; in __skb_udp_tunnel_segment()
50 SKB_GSO_CB(skb)->encap_level = 0; in __skb_udp_tunnel_segment()
55 skb->mac_len = skb_inner_network_offset(skb); in __skb_udp_tunnel_segment()
56 skb->protocol = new_protocol; in __skb_udp_tunnel_segment()
58 need_csum = !!(skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM); in __skb_udp_tunnel_segment()
59 skb->encap_hdr_csum = need_csum; in __skb_udp_tunnel_segment()
61 remcsum = !!(skb_shinfo(skb)->gso_type & SKB_GSO_TUNNEL_REMCSUM); in __skb_udp_tunnel_segment()
62 skb->remcsum_offload = remcsum; in __skb_udp_tunnel_segment()
68 (skb->dev->features & in __skb_udp_tunnel_segment()
72 features &= skb->dev->hw_enc_features; in __skb_udp_tunnel_segment()
94 gso_partial = !!(skb_shinfo(segs)->gso_type & SKB_GSO_PARTIAL); in __skb_udp_tunnel_segment()
97 udp_offset = outer_hlen - tnl_hlen; in __skb_udp_tunnel_segment()
103 skb->ip_summed = CHECKSUM_NONE; in __skb_udp_tunnel_segment()
106 if (skb->ip_summed == CHECKSUM_PARTIAL) { in __skb_udp_tunnel_segment()
108 skb->encapsulation = 1; in __skb_udp_tunnel_segment()
111 skb->mac_len = mac_len; in __skb_udp_tunnel_segment()
112 skb->protocol = protocol; in __skb_udp_tunnel_segment()
118 len = skb->len - udp_offset; in __skb_udp_tunnel_segment()
126 uh->len = htons(skb_shinfo(skb)->gso_size + in __skb_udp_tunnel_segment()
127 SKB_GSO_CB(skb)->data_offset + in __skb_udp_tunnel_segment()
128 skb->head - (unsigned char *)uh); in __skb_udp_tunnel_segment()
130 uh->len = htons(len); in __skb_udp_tunnel_segment()
136 uh->check = ~csum_fold(csum_add(partial, in __skb_udp_tunnel_segment()
139 if (skb->encapsulation || !offload_csum) { in __skb_udp_tunnel_segment()
140 uh->check = gso_make_checksum(skb, ~uh->check); in __skb_udp_tunnel_segment()
141 if (uh->check == 0) in __skb_udp_tunnel_segment()
142 uh->check = CSUM_MANGLED_0; in __skb_udp_tunnel_segment()
144 skb->ip_summed = CHECKSUM_PARTIAL; in __skb_udp_tunnel_segment()
145 skb->csum_start = skb_transport_header(skb) - skb->head; in __skb_udp_tunnel_segment()
146 skb->csum_offset = offsetof(struct udphdr, check); in __skb_udp_tunnel_segment()
148 } while ((skb = skb->next)); in __skb_udp_tunnel_segment()
158 __be16 protocol = skb->protocol; in skb_udp_tunnel_segment()
160 struct sk_buff *segs = ERR_PTR(-EINVAL); in skb_udp_tunnel_segment()
166 switch (skb->inner_protocol_type) { in skb_udp_tunnel_segment()
168 protocol = skb->inner_protocol; in skb_udp_tunnel_segment()
173 ops = rcu_dereference(offloads[skb->inner_ipproto]); in skb_udp_tunnel_segment()
174 if (!ops || !ops->callbacks.gso_segment) in skb_udp_tunnel_segment()
176 gso_inner_segment = ops->callbacks.gso_segment; in skb_udp_tunnel_segment()
205 if (uh->check) { in __udpv4_gso_segment_csum()
206 inet_proto_csum_replace4(&uh->check, seg, *oldip, *newip, in __udpv4_gso_segment_csum()
208 inet_proto_csum_replace2(&uh->check, seg, *oldport, *newport, in __udpv4_gso_segment_csum()
210 if (!uh->check) in __udpv4_gso_segment_csum()
211 uh->check = CSUM_MANGLED_0; in __udpv4_gso_segment_csum()
215 csum_replace4(&iph->check, *oldip, *newip); in __udpv4_gso_segment_csum()
229 if ((udp_hdr(seg)->dest == udp_hdr(seg->next)->dest) && in __udpv4_gso_segment_list_csum()
230 (udp_hdr(seg)->source == udp_hdr(seg->next)->source) && in __udpv4_gso_segment_list_csum()
231 (ip_hdr(seg)->daddr == ip_hdr(seg->next)->daddr) && in __udpv4_gso_segment_list_csum()
232 (ip_hdr(seg)->saddr == ip_hdr(seg->next)->saddr)) in __udpv4_gso_segment_list_csum()
235 while ((seg = seg->next)) { in __udpv4_gso_segment_list_csum()
240 &iph2->saddr, &iph->saddr, in __udpv4_gso_segment_list_csum()
241 &uh2->source, &uh->source); in __udpv4_gso_segment_list_csum()
243 &iph2->daddr, &iph->daddr, in __udpv4_gso_segment_list_csum()
244 &uh2->dest, &uh->dest); in __udpv4_gso_segment_list_csum()
260 if (uh->check) { in __udpv6_gso_segment_csum()
261 inet_proto_csum_replace16(&uh->check, seg, oldip->s6_addr32, in __udpv6_gso_segment_csum()
262 newip->s6_addr32, true); in __udpv6_gso_segment_csum()
264 inet_proto_csum_replace2(&uh->check, seg, *oldport, newport, in __udpv6_gso_segment_csum()
266 if (!uh->check) in __udpv6_gso_segment_csum()
267 uh->check = CSUM_MANGLED_0; in __udpv6_gso_segment_csum()
285 uh2 = udp_hdr(seg->next); in __udpv6_gso_segment_list_csum()
286 iph2 = ipv6_hdr(seg->next); in __udpv6_gso_segment_list_csum()
288 if (!(*(const u32 *)&uh->source ^ *(const u32 *)&uh2->source) && in __udpv6_gso_segment_list_csum()
289 ipv6_addr_equal(&iph->saddr, &iph2->saddr) && in __udpv6_gso_segment_list_csum()
290 ipv6_addr_equal(&iph->daddr, &iph2->daddr)) in __udpv6_gso_segment_list_csum()
293 while ((seg = seg->next)) { in __udpv6_gso_segment_list_csum()
297 __udpv6_gso_segment_csum(seg, &iph2->saddr, &iph->saddr, in __udpv6_gso_segment_list_csum()
298 &uh2->source, uh->source); in __udpv6_gso_segment_list_csum()
299 __udpv6_gso_segment_csum(seg, &iph2->daddr, &iph->daddr, in __udpv6_gso_segment_list_csum()
300 &uh2->dest, uh->dest); in __udpv6_gso_segment_list_csum()
310 unsigned int mss = skb_shinfo(skb)->gso_size; in __udp_gso_segment_list()
316 udp_hdr(skb)->len = htons(sizeof(struct udphdr) + mss); in __udp_gso_segment_list()
327 struct sock *sk = gso_skb->sk; in __udp_gso_segment()
336 mss = skb_shinfo(gso_skb)->gso_size; in __udp_gso_segment()
337 if (gso_skb->len <= sizeof(*uh) + mss) in __udp_gso_segment()
338 return ERR_PTR(-EINVAL); in __udp_gso_segment()
342 !(skb_shinfo(gso_skb)->gso_type & SKB_GSO_FRAGLIST))) in __udp_gso_segment()
343 return ERR_PTR(-EINVAL); in __udp_gso_segment()
348 if (gso_skb->ip_summed != CHECKSUM_PARTIAL) in __udp_gso_segment()
353 skb_shinfo(gso_skb)->gso_segs = DIV_ROUND_UP(gso_skb->len - sizeof(*uh), in __udp_gso_segment()
358 if (skb_shinfo(gso_skb)->gso_type & SKB_GSO_FRAGLIST) { in __udp_gso_segment()
360 if (skb_pagelen(gso_skb) - sizeof(*uh) == skb_shinfo(gso_skb)->gso_size) in __udp_gso_segment()
364 gso_skb->csum_start = skb_transport_header(gso_skb) - gso_skb->head; in __udp_gso_segment()
365 gso_skb->csum_offset = offsetof(struct udphdr, check); in __udp_gso_segment()
366 gso_skb->ip_summed = CHECKSUM_PARTIAL; in __udp_gso_segment()
370 uh->check = ~udp_v6_check(gso_skb->len, in __udp_gso_segment()
371 &ipv6_hdr(gso_skb)->saddr, in __udp_gso_segment()
372 &ipv6_hdr(gso_skb)->daddr, 0); in __udp_gso_segment()
374 uh->check = ~udp_v4_check(gso_skb->len, in __udp_gso_segment()
375 ip_hdr(gso_skb)->saddr, in __udp_gso_segment()
376 ip_hdr(gso_skb)->daddr, 0); in __udp_gso_segment()
382 copy_dtor = gso_skb->destructor == sock_wfree; in __udp_gso_segment()
384 gso_skb->destructor = NULL; in __udp_gso_segment()
385 gso_skb->sk = NULL; in __udp_gso_segment()
391 gso_skb->destructor = sock_wfree; in __udp_gso_segment()
392 gso_skb->sk = sk; in __udp_gso_segment()
402 mss *= skb_shinfo(segs)->gso_segs; in __udp_gso_segment()
408 skb_shinfo(seg)->tskey = skb_shinfo(gso_skb)->tskey; in __udp_gso_segment()
409 skb_shinfo(seg)->tx_flags |= in __udp_gso_segment()
410 (skb_shinfo(gso_skb)->tx_flags & SKBTX_ANY_TSTAMP); in __udp_gso_segment()
414 check = csum16_add(csum16_sub(uh->check, uh->len), newlen); in __udp_gso_segment()
418 seg->destructor = sock_wfree; in __udp_gso_segment()
419 seg->sk = sk; in __udp_gso_segment()
420 sum_truesize += seg->truesize; in __udp_gso_segment()
423 if (!seg->next) in __udp_gso_segment()
426 uh->len = newlen; in __udp_gso_segment()
427 uh->check = check; in __udp_gso_segment()
429 if (seg->ip_summed == CHECKSUM_PARTIAL) in __udp_gso_segment()
432 uh->check = gso_make_checksum(seg, ~check) ? : in __udp_gso_segment()
435 seg = seg->next; in __udp_gso_segment()
440 newlen = htons(skb_tail_pointer(seg) - skb_transport_header(seg) + in __udp_gso_segment()
441 seg->data_len); in __udp_gso_segment()
442 check = csum16_add(csum16_sub(uh->check, uh->len), newlen); in __udp_gso_segment()
444 uh->len = newlen; in __udp_gso_segment()
445 uh->check = check; in __udp_gso_segment()
447 if (seg->ip_summed == CHECKSUM_PARTIAL) in __udp_gso_segment()
450 uh->check = gso_make_checksum(seg, ~check) ? : CSUM_MANGLED_0; in __udp_gso_segment()
457 if (gso_skb->ip_summed == CHECKSUM_NONE) in __udp_gso_segment()
458 gso_skb->ip_summed = CHECKSUM_UNNECESSARY; in __udp_gso_segment()
462 int delta = sum_truesize - gso_skb->truesize; in __udp_gso_segment()
468 refcount_add(delta, &sk->sk_wmem_alloc); in __udp_gso_segment()
470 WARN_ON_ONCE(refcount_sub_and_test(-delta, &sk->sk_wmem_alloc)); in __udp_gso_segment()
479 struct sk_buff *segs = ERR_PTR(-EINVAL); in udp4_ufo_fragment()
485 if (skb->encapsulation && in udp4_ufo_fragment()
486 (skb_shinfo(skb)->gso_type & in udp4_ufo_fragment()
492 if (!(skb_shinfo(skb)->gso_type & (SKB_GSO_UDP | SKB_GSO_UDP_L4))) in udp4_ufo_fragment()
498 if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) in udp4_ufo_fragment()
501 mss = skb_shinfo(skb)->gso_size; in udp4_ufo_fragment()
502 if (unlikely(skb->len <= mss)) in udp4_ufo_fragment()
506 * HW cannot do checksum of UDP packets sent as multiple in udp4_ufo_fragment()
513 uh->check = 0; in udp4_ufo_fragment()
514 csum = skb_checksum(skb, 0, skb->len, 0); in udp4_ufo_fragment()
515 uh->check = udp_v4_check(skb->len, iph->saddr, iph->daddr, csum); in udp4_ufo_fragment()
516 if (uh->check == 0) in udp4_ufo_fragment()
517 uh->check = CSUM_MANGLED_0; in udp4_ufo_fragment()
519 skb->ip_summed = CHECKSUM_UNNECESSARY; in udp4_ufo_fragment()
525 if (!skb->encap_hdr_csum) in udp4_ufo_fragment()
550 if (!uh->check) { in udp_gro_receive_segment()
551 NAPI_GRO_CB(skb)->flush = 1; in udp_gro_receive_segment()
556 ulen = ntohs(uh->len); in udp_gro_receive_segment()
558 NAPI_GRO_CB(skb)->flush = 1; in udp_gro_receive_segment()
565 if (!NAPI_GRO_CB(p)->same_flow) in udp_gro_receive_segment()
571 if ((*(u32 *)&uh->source != *(u32 *)&uh2->source)) { in udp_gro_receive_segment()
572 NAPI_GRO_CB(p)->same_flow = 0; in udp_gro_receive_segment()
576 if (NAPI_GRO_CB(skb)->is_flist != NAPI_GRO_CB(p)->is_flist) { in udp_gro_receive_segment()
577 NAPI_GRO_CB(skb)->flush = 1; in udp_gro_receive_segment()
584 * Under small packet flood GRO count could elsewhere grow a lot in udp_gro_receive_segment()
587 * otherwise complete the GRO packet. in udp_gro_receive_segment()
589 if (ulen > ntohs(uh2->len) || flush) { in udp_gro_receive_segment()
592 if (NAPI_GRO_CB(skb)->is_flist) { in udp_gro_receive_segment()
594 NAPI_GRO_CB(skb)->flush = 1; in udp_gro_receive_segment()
597 if ((skb->ip_summed != p->ip_summed) || in udp_gro_receive_segment()
598 (skb->csum_level != p->csum_level)) { in udp_gro_receive_segment()
599 NAPI_GRO_CB(skb)->flush = 1; in udp_gro_receive_segment()
611 if (ret || ulen != ntohs(uh2->len) || in udp_gro_receive_segment()
612 NAPI_GRO_CB(p)->count >= UDP_GRO_CNT_MAX) in udp_gro_receive_segment()
636 NAPI_GRO_CB(skb)->is_flist = 0; in udp_gro_receive()
637 if (!sk || !udp_sk(sk)->gro_receive) { in udp_gro_receive()
639 * wasn't detected above, do not GRO. in udp_gro_receive()
641 if (skb->encapsulation) in udp_gro_receive()
644 if (skb->dev->features & NETIF_F_GRO_FRAGLIST) in udp_gro_receive()
645 NAPI_GRO_CB(skb)->is_flist = sk ? !udp_test_bit(GRO_ENABLED, sk) : 1; in udp_gro_receive()
647 if ((!sk && (skb->dev->features & NETIF_F_GRO_UDP_FWD)) || in udp_gro_receive()
648 (sk && udp_test_bit(GRO_ENABLED, sk)) || NAPI_GRO_CB(skb)->is_flist) in udp_gro_receive()
651 /* no GRO, be sure flush the current packet */ in udp_gro_receive()
655 if (NAPI_GRO_CB(skb)->encap_mark || in udp_gro_receive()
656 (uh->check && skb->ip_summed != CHECKSUM_PARTIAL && in udp_gro_receive()
657 NAPI_GRO_CB(skb)->csum_cnt == 0 && in udp_gro_receive()
658 !NAPI_GRO_CB(skb)->csum_valid)) in udp_gro_receive()
661 /* mark that this skb passed once through the tunnel gro layer */ in udp_gro_receive()
662 NAPI_GRO_CB(skb)->encap_mark = 1; in udp_gro_receive()
667 if (!NAPI_GRO_CB(p)->same_flow) in udp_gro_receive()
670 uh2 = (struct udphdr *)(p->data + off); in udp_gro_receive()
675 if ((*(u32 *)&uh->source != *(u32 *)&uh2->source) || in udp_gro_receive()
676 (!uh->check ^ !uh2->check)) { in udp_gro_receive()
677 NAPI_GRO_CB(p)->same_flow = 0; in udp_gro_receive()
684 pp = call_gro_receive_sk(udp_sk(sk)->gro_receive, sk, head, skb); in udp_gro_receive()
696 struct net *net = dev_net_rcu(skb->dev); in udp4_gro_lookup_skb()
701 return __udp4_lib_lookup(net, iph->saddr, sport, in udp4_gro_lookup_skb()
702 iph->daddr, dport, iif, in udp4_gro_lookup_skb()
703 sdif, net->ipv4.udp_table, NULL); in udp4_gro_lookup_skb()
717 if (NAPI_GRO_CB(skb)->flush) in udp4_gro_receive()
720 if (skb_gro_checksum_validate_zero_check(skb, IPPROTO_UDP, uh->check, in udp4_gro_receive()
723 else if (uh->check) in udp4_gro_receive()
727 NAPI_GRO_CB(skb)->is_ipv6 = 0; in udp4_gro_receive()
730 sk = udp4_gro_lookup_skb(skb, uh->source, uh->dest); in udp4_gro_receive()
736 NAPI_GRO_CB(skb)->flush = 1; in udp4_gro_receive()
744 skb->csum_start = (unsigned char *)uh - skb->head; in udp_gro_complete_segment()
745 skb->csum_offset = offsetof(struct udphdr, check); in udp_gro_complete_segment()
746 skb->ip_summed = CHECKSUM_PARTIAL; in udp_gro_complete_segment()
748 skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count; in udp_gro_complete_segment()
749 skb_shinfo(skb)->gso_type |= SKB_GSO_UDP_L4; in udp_gro_complete_segment()
751 if (skb->encapsulation) in udp_gro_complete_segment()
752 skb->inner_transport_header = skb->transport_header; in udp_gro_complete_segment()
760 __be16 newlen = htons(skb->len - nhoff); in udp_gro_complete()
761 struct udphdr *uh = (struct udphdr *)(skb->data + nhoff); in udp_gro_complete()
765 uh->len = newlen; in udp_gro_complete()
768 udp4_lib_lookup_skb, skb, uh->source, uh->dest); in udp_gro_complete()
769 if (sk && udp_sk(sk)->gro_complete) { in udp_gro_complete()
770 skb_shinfo(skb)->gso_type = uh->check ? SKB_GSO_UDP_TUNNEL_CSUM in udp_gro_complete()
776 NAPI_GRO_CB(skb)->encap_mark = 0; in udp_gro_complete()
781 skb->encapsulation = 1; in udp_gro_complete()
782 err = udp_sk(sk)->gro_complete(sk, skb, in udp_gro_complete()
788 if (skb->remcsum_offload) in udp_gro_complete()
789 skb_shinfo(skb)->gso_type |= SKB_GSO_TUNNEL_REMCSUM; in udp_gro_complete()
797 const u16 offset = NAPI_GRO_CB(skb)->network_offsets[skb->encapsulation]; in udp4_gro_complete()
798 const struct iphdr *iph = (struct iphdr *)(skb->data + offset); in udp4_gro_complete()
799 struct udphdr *uh = (struct udphdr *)(skb->data + nhoff); in udp4_gro_complete()
802 if (NAPI_GRO_CB(skb)->is_flist && !NAPI_GRO_CB(skb)->encap_mark) { in udp4_gro_complete()
803 uh->len = htons(skb->len - nhoff); in udp4_gro_complete()
805 skb_shinfo(skb)->gso_type |= (SKB_GSO_FRAGLIST|SKB_GSO_UDP_L4); in udp4_gro_complete()
806 skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count; in udp4_gro_complete()
813 if (uh->check) in udp4_gro_complete()
814 uh->check = ~udp_v4_check(skb->len - nhoff, iph->saddr, in udp4_gro_complete()
815 iph->daddr, 0); in udp4_gro_complete()