[TCP]: tcp_simple_retransmit can cause S+L

[linux-2.6-omap-h63xx.git] / include / net / tcp.h

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 13ebe11a0af7d357b435d702edf7d5ce0c44116f..4fd3eb2f8ec2c4bef73eab8ebe9866301e00832e 100644 (file)
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -578,10 +578,6 @@ struct tcp_skb_cb {
 #define TCPCB_EVER_RETRANS     0x80    /* Ever retransmitted frame     */
 #define TCPCB_RETRANS          (TCPCB_SACKED_RETRANS|TCPCB_EVER_RETRANS)
 
-#define TCPCB_URG              0x20    /* Urgent pointer advanced here */
-
-#define TCPCB_AT_TAIL          (TCPCB_URG)
-
        __u16           urg_ptr;        /* Valid w/URG flags is set.    */
        __u32           ack_seq;        /* Sequence number ACK'd        */
 };
@@ -756,6 +752,8 @@ static inline unsigned int tcp_packets_in_flight(const struct tcp_sock *tp)
        return tp->packets_out - tcp_left_out(tp) + tp->retrans_out;
 }
 
+extern int tcp_limit_reno_sacked(struct tcp_sock *tp);
+
 /* If cwnd > ssthresh, we may raise ssthresh to be half-way to cwnd.
  * The exception is rate halving phase, when cwnd is decreasing towards
  * ssthresh.
@@ -785,26 +783,12 @@ static __inline__ __u32 tcp_max_burst(const struct tcp_sock *tp)
        return 3;
 }
 
-/* RFC2861 Check whether we are limited by application or congestion window
- * This is the inverse of cwnd check in tcp_tso_should_defer
- */
-static inline int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight)
+/* Returns end sequence number of the receiver's advertised window */
+static inline u32 tcp_wnd_end(const struct tcp_sock *tp)
 {
-       const struct tcp_sock *tp = tcp_sk(sk);
-       u32 left;
-
-       if (in_flight >= tp->snd_cwnd)
-               return 1;
-
-       if (!sk_can_gso(sk))
-               return 0;
-
-       left = tp->snd_cwnd - in_flight;
-       if (sysctl_tcp_tso_win_divisor)
-               return left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd;
-       else
-               return left <= tcp_max_burst(tp);
+       return tp->snd_una + tp->snd_wnd;
 }
+extern int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight);
 
 static inline void tcp_minshall_update(struct tcp_sock *tp, unsigned int mss,
                                       const struct sk_buff *skb)
@@ -924,40 +908,7 @@ static const char *statename[]={
        "Close Wait","Last ACK","Listen","Closing"
 };
 #endif
-
-static inline void tcp_set_state(struct sock *sk, int state)
-{
-       int oldstate = sk->sk_state;
-
-       switch (state) {
-       case TCP_ESTABLISHED:
-               if (oldstate != TCP_ESTABLISHED)
-                       TCP_INC_STATS(TCP_MIB_CURRESTAB);
-               break;
-
-       case TCP_CLOSE:
-               if (oldstate == TCP_CLOSE_WAIT || oldstate == TCP_ESTABLISHED)
-                       TCP_INC_STATS(TCP_MIB_ESTABRESETS);
-
-               sk->sk_prot->unhash(sk);
-               if (inet_csk(sk)->icsk_bind_hash &&
-                   !(sk->sk_userlocks & SOCK_BINDPORT_LOCK))
-                       inet_put_port(&tcp_hashinfo, sk);
-               /* fall through */
-       default:
-               if (oldstate==TCP_ESTABLISHED)
-                       TCP_DEC_STATS(TCP_MIB_CURRESTAB);
-       }
-
-       /* Change state AFTER socket is unhashed to avoid closed
-        * socket sitting in hash tables.
-        */
-       sk->sk_state = state;
-
-#ifdef STATE_TRACE
-       SOCK_DEBUG(sk, "TCP sk=%p, State %s -> %s\n",sk, statename[oldstate],statename[state]);
-#endif 
-}
+extern void tcp_set_state(struct sock *sk, int state);
 
 extern void tcp_done(struct sock *sk);
 
@@ -1196,8 +1147,8 @@ static inline void tcp_write_queue_purge(struct sock *sk)
        struct sk_buff *skb;
 
        while ((skb = __skb_dequeue(&sk->sk_write_queue)) != NULL)
-               sk_stream_free_skb(sk, skb);
-       sk_stream_mem_reclaim(sk);
+               sk_wmem_free_skb(sk, skb);
+       sk_mem_reclaim(sk);
 }
 
 static inline struct sk_buff *tcp_write_queue_head(struct sock *sk)