net: add code for TCP fraglist GRO
This implements fraglist GRO similar to how it's handled in UDP, however no functional changes are added yet. The next change adds a heuristic for using fraglist GRO instead of regular GRO. Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Felix Fietkau <nbd@nbd.name> Reviewed-by: Eric Dumazet <edumazet@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Reviewed-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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@ -334,6 +334,18 @@ found:
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flush |= (ntohl(th2->seq) + skb_gro_len(p)) ^ ntohl(th->seq);
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flush |= skb_cmp_decrypted(p, skb);
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if (unlikely(NAPI_GRO_CB(p)->is_flist)) {
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flush |= (__force int)(flags ^ tcp_flag_word(th2));
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flush |= skb->ip_summed != p->ip_summed;
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flush |= skb->csum_level != p->csum_level;
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flush |= NAPI_GRO_CB(p)->count >= 64;
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if (flush || skb_gro_receive_list(p, skb))
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mss = 1;
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goto out_check_final;
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}
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if (flush || skb_gro_receive(p, skb)) {
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mss = 1;
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goto out_check_final;
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@ -400,6 +412,15 @@ INDIRECT_CALLABLE_SCOPE int tcp4_gro_complete(struct sk_buff *skb, int thoff)
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const struct iphdr *iph = ip_hdr(skb);
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struct tcphdr *th = tcp_hdr(skb);
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if (unlikely(NAPI_GRO_CB(skb)->is_flist)) {
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skb_shinfo(skb)->gso_type |= SKB_GSO_FRAGLIST | SKB_GSO_TCPV4;
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skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;
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__skb_incr_checksum_unnecessary(skb);
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return 0;
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}
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th->check = ~tcp_v4_check(skb->len - thoff, iph->saddr,
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iph->daddr, 0);
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@ -32,6 +32,15 @@ INDIRECT_CALLABLE_SCOPE int tcp6_gro_complete(struct sk_buff *skb, int thoff)
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const struct ipv6hdr *iph = ipv6_hdr(skb);
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struct tcphdr *th = tcp_hdr(skb);
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if (unlikely(NAPI_GRO_CB(skb)->is_flist)) {
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skb_shinfo(skb)->gso_type |= SKB_GSO_FRAGLIST | SKB_GSO_TCPV6;
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skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;
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__skb_incr_checksum_unnecessary(skb);
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return 0;
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}
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th->check = ~tcp_v6_check(skb->len - thoff, &iph->saddr,
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&iph->daddr, 0);
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skb_shinfo(skb)->gso_type |= SKB_GSO_TCPV6;
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