diff options
Diffstat (limited to 'include/net/tcp.h')
| -rw-r--r-- | include/net/tcp.h | 58 |
1 files changed, 11 insertions, 47 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index 3202bde2a74..ab9f947b118 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -266,7 +266,6 @@ extern int sysctl_tcp_abort_on_overflow; extern int sysctl_tcp_max_orphans; extern int sysctl_tcp_fack; extern int sysctl_tcp_reordering; -extern int sysctl_tcp_ecn; extern int sysctl_tcp_dsack; extern int sysctl_tcp_wmem[3]; extern int sysctl_tcp_rmem[3]; @@ -280,7 +279,6 @@ extern int sysctl_tcp_dma_copybreak; extern int sysctl_tcp_nometrics_save; extern int sysctl_tcp_moderate_rcvbuf; extern int sysctl_tcp_tso_win_divisor; -extern int sysctl_tcp_abc; extern int sysctl_tcp_mtu_probing; extern int sysctl_tcp_base_mss; extern int sysctl_tcp_workaround_signed_windows; @@ -504,7 +502,8 @@ static inline __u32 cookie_v4_init_sequence(struct sock *sk, #endif extern __u32 cookie_init_timestamp(struct request_sock *req); -extern bool cookie_check_timestamp(struct tcp_options_received *opt, bool *); +extern bool cookie_check_timestamp(struct tcp_options_received *opt, + struct net *net, bool *ecn_ok); /* From net/ipv6/syncookies.c */ extern struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb); @@ -524,6 +523,7 @@ static inline __u32 cookie_v6_init_sequence(struct sock *sk, extern void __tcp_push_pending_frames(struct sock *sk, unsigned int cur_mss, int nonagle); extern bool tcp_may_send_now(struct sock *sk); +extern int __tcp_retransmit_skb(struct sock *, struct sk_buff *); extern int tcp_retransmit_skb(struct sock *, struct sk_buff *); extern void tcp_retransmit_timer(struct sock *sk); extern void tcp_xmit_retransmit_queue(struct sock *); @@ -543,6 +543,8 @@ extern bool tcp_syn_flood_action(struct sock *sk, extern void tcp_push_one(struct sock *, unsigned int mss_now); extern void tcp_send_ack(struct sock *sk); extern void tcp_send_delayed_ack(struct sock *sk); +extern void tcp_send_loss_probe(struct sock *sk); +extern bool tcp_schedule_loss_probe(struct sock *sk); /* tcp_input.c */ extern void tcp_cwnd_application_limited(struct sock *sk); @@ -727,11 +729,12 @@ struct tcp_skb_cb { * notifications, we disable TCP ECN negociation. */ static inline void -TCP_ECN_create_request(struct request_sock *req, const struct sk_buff *skb) +TCP_ECN_create_request(struct request_sock *req, const struct sk_buff *skb, + struct net *net) { const struct tcphdr *th = tcp_hdr(skb); - if (sysctl_tcp_ecn && th->ece && th->cwr && + if (net->ipv4.sysctl_tcp_ecn && th->ece && th->cwr && INET_ECN_is_not_ect(TCP_SKB_CB(skb)->ip_dsfield)) inet_rsk(req)->ecn_ok = 1; } @@ -872,8 +875,8 @@ static inline void tcp_enable_fack(struct tcp_sock *tp) static inline void tcp_enable_early_retrans(struct tcp_sock *tp) { tp->do_early_retrans = sysctl_tcp_early_retrans && - !sysctl_tcp_thin_dupack && sysctl_tcp_reordering == 3; - tp->early_retrans_delayed = 0; + sysctl_tcp_early_retrans < 4 && !sysctl_tcp_thin_dupack && + sysctl_tcp_reordering == 3; } static inline void tcp_disable_early_retrans(struct tcp_sock *tp) @@ -1029,46 +1032,7 @@ static inline void tcp_prequeue_init(struct tcp_sock *tp) #endif } -/* Packet is added to VJ-style prequeue for processing in process - * context, if a reader task is waiting. Apparently, this exciting - * idea (VJ's mail "Re: query about TCP header on tcp-ip" of 07 Sep 93) - * failed somewhere. Latency? Burstiness? Well, at least now we will - * see, why it failed. 8)8) --ANK - * - * NOTE: is this not too big to inline? - */ -static inline bool tcp_prequeue(struct sock *sk, struct sk_buff *skb) -{ - struct tcp_sock *tp = tcp_sk(sk); - - if (sysctl_tcp_low_latency || !tp->ucopy.task) - return false; - - __skb_queue_tail(&tp->ucopy.prequeue, skb); - tp->ucopy.memory += skb->truesize; - if (tp->ucopy.memory > sk->sk_rcvbuf) { - struct sk_buff *skb1; - - BUG_ON(sock_owned_by_user(sk)); - - while ((skb1 = __skb_dequeue(&tp->ucopy.prequeue)) != NULL) { - sk_backlog_rcv(sk, skb1); - NET_INC_STATS_BH(sock_net(sk), - LINUX_MIB_TCPPREQUEUEDROPPED); - } - - tp->ucopy.memory = 0; - } else if (skb_queue_len(&tp->ucopy.prequeue) == 1) { - wake_up_interruptible_sync_poll(sk_sleep(sk), - POLLIN | POLLRDNORM | POLLRDBAND); - if (!inet_csk_ack_scheduled(sk)) - inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK, - (3 * tcp_rto_min(sk)) / 4, - TCP_RTO_MAX); - } - return true; -} - +extern bool tcp_prequeue(struct sock *sk, struct sk_buff *skb); #undef STATE_TRACE |