diff --git a/include/net/tcp.h b/include/net/tcp.h index 3e00ca4d09a..6bb4a32841c 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -356,6 +356,7 @@ extern int tcp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, extern int tcp_sendpage(struct sock *sk, struct page *page, int offset, size_t size, int flags); extern void tcp_release_cb(struct sock *sk); +extern void tcp_wfree(struct sk_buff *skb); extern int tcp_ioctl(struct sock *sk, int cmd, unsigned long arg); extern int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb, const struct tcphdr *th, unsigned int len); diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index f8a83d869b5..936c4acd671 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2765,6 +2765,7 @@ struct sk_buff *tcp_tso_segment(struct sk_buff *skb, __be32 delta; unsigned int oldlen; unsigned int mss; + struct sk_buff *gso_skb = skb; if (!pskb_may_pull(skb, sizeof(*th))) goto out; @@ -2831,6 +2832,17 @@ struct sk_buff *tcp_tso_segment(struct sk_buff *skb, th->cwr = 0; } while (skb->next); + /* Following permits TCP Small Queues to work well with GSO : + * The callback to TCP stack will be called at the time last frag + * is freed at TX completion, and not right now when gso_skb + * is freed by GSO engine + */ + if (gso_skb->destructor == tcp_wfree) { + swap(gso_skb->sk, skb->sk); + swap(gso_skb->destructor, skb->destructor); + swap(gso_skb->truesize, skb->truesize); + } + delta = htonl(oldlen + (skb->tail - skb->transport_header) + skb->data_len); th->check = ~csum_fold((__force __wsum)((__force u32)th->check +