/* * IPV6 GSO/GRO offload support * Linux INET6 implementation * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. * * TCPv6 GSO/GRO support */ #include #include #include #include #include "ip6_offload.h" static struct sk_buff **tcp6_gro_receive(struct sk_buff **head, struct sk_buff *skb) { /* Don't bother verifying checksum if we're going to flush anyway. */ if (!NAPI_GRO_CB(skb)->flush && skb_gro_checksum_validate(skb, IPPROTO_TCP, ip6_gro_compute_pseudo)) { NAPI_GRO_CB(skb)->flush = 1; return NULL; } return tcp_gro_receive(head, skb); } static int tcp6_gro_complete(struct sk_buff *skb, int thoff) { const struct ipv6hdr *iph = ipv6_hdr(skb); struct tcphdr *th = tcp_hdr(skb); th->check = ~tcp_v6_check(skb->len - thoff, &iph->saddr, &iph->daddr, 0); skb_shinfo(skb)->gso_type |= SKB_GSO_TCPV6; return tcp_gro_complete(skb); } static struct sk_buff *tcp6_gso_segment(struct sk_buff *skb, netdev_features_t features) { struct tcphdr *th; if (!pskb_may_pull(skb, sizeof(*th))) return ERR_PTR(-EINVAL); if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) { const struct ipv6hdr *ipv6h = ipv6_hdr(skb); struct tcphdr *th = tcp_hdr(skb); /* Set up pseudo header, usually expect stack to have done * this. */ th->check = 0; skb->ip_summed = CHECKSUM_PARTIAL; __tcp_v6_send_check(skb, &ipv6h->saddr, &ipv6h->daddr); } return tcp_gso_segment(skb, features); } static const struct net_offload tcpv6_offload = { .callbacks = { .gso_segment = tcp6_gso_segment, .gro_receive = tcp6_gro_receive, .gro_complete = tcp6_gro_complete, }, }; int __init tcpv6_offload_init(void) { return inet6_add_offload(&tcpv6_offload, IPPROTO_TCP); } 8c8b88de3b9c34b'>diff
AgeCommit message (Expand)AuthorFilesLines