Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

[linux-2.6] / net / dccp / timer.c

diff --git a/net/dccp/timer.c b/net/dccp/timer.c
index e8f519e7f481133f7b3b50c5d317e7e7f3628cd3..8703a792b56068ec44e15804731d2a0366ce7873 100644 (file)
--- a/net/dccp/timer.c
+++ b/net/dccp/timer.c
@@ -1,6 +1,6 @@
 /*
  *  net/dccp/timer.c
- * 
+ *
  *  An implementation of the DCCP protocol
  *  Arnaldo Carvalho de Melo <acme@conectiva.com.br>
  *
@@ -60,7 +60,7 @@ static int dccp_write_timeout(struct sock *sk)
    be far nicer to have all of the black holes fixed rather than fixing
    all of the TCP implementations."
 
-                           Golden words :-).
+                          Golden words :-).
                   */
 
                        dst_negative_advice(&sk->sk_dst_cache);
@@ -102,13 +102,13 @@ static void dccp_retransmit_timer(struct sock *sk)
         * sk->sk_send_head has to have one skb with
         * DCCP_SKB_CB(skb)->dccpd_type set to one of the retransmittable DCCP
         * packet types. The only packets eligible for retransmission are:
-        *      -- Requests in client-REQUEST  state (sec. 8.1.1)
-        *      -- Acks     in client-PARTOPEN state (sec. 8.1.5)
-        *      -- CloseReq in server-CLOSEREQ state (sec. 8.3)
-        *      -- Close    in   node-CLOSING  state (sec. 8.3)                */
+        *      -- Requests in client-REQUEST  state (sec. 8.1.1)
+        *      -- Acks     in client-PARTOPEN state (sec. 8.1.5)
+        *      -- CloseReq in server-CLOSEREQ state (sec. 8.3)
+        *      -- Close    in   node-CLOSING  state (sec. 8.3)                */
        BUG_TRAP(sk->sk_send_head != NULL);
 
-       /* 
+       /*
         * More than than 4MSL (8 minutes) has passed, a RESET(aborted) was
         * sent, no need to retransmit, this sock is dead.
         */
@@ -200,7 +200,7 @@ static void dccp_keepalive_timer(unsigned long data)
        /* Only process if socket is not in use. */
        bh_lock_sock(sk);
        if (sock_owned_by_user(sk)) {
-               /* Try again later. */ 
+               /* Try again later. */
                inet_csk_reset_keepalive_timer(sk, HZ / 20);
                goto out;
        }
@@ -261,8 +261,53 @@ out:
        sock_put(sk);
 }
 
+/* Transmit-delay timer: used by the CCIDs to delay actual send time */
+static void dccp_write_xmit_timer(unsigned long data)
+{
+       struct sock *sk = (struct sock *)data;
+       struct dccp_sock *dp = dccp_sk(sk);
+
+       bh_lock_sock(sk);
+       if (sock_owned_by_user(sk))
+               sk_reset_timer(sk, &dp->dccps_xmit_timer, jiffies+1);
+       else
+               dccp_write_xmit(sk, 0);
+       bh_unlock_sock(sk);
+       sock_put(sk);
+}
+
+static void dccp_init_write_xmit_timer(struct sock *sk)
+{
+       struct dccp_sock *dp = dccp_sk(sk);
+
+       setup_timer(&dp->dccps_xmit_timer, dccp_write_xmit_timer,
+                       (unsigned long)sk);
+}
+
 void dccp_init_xmit_timers(struct sock *sk)
 {
+       dccp_init_write_xmit_timer(sk);
        inet_csk_init_xmit_timers(sk, &dccp_write_timer, &dccp_delack_timer,
                                  &dccp_keepalive_timer);
 }
+
+static ktime_t dccp_timestamp_seed;
+/**
+ * dccp_timestamp  -  10s of microseconds time source
+ * Returns the number of 10s of microseconds since loading DCCP. This is native
+ * DCCP time difference format (RFC 4340, sec. 13).
+ * Please note: This will wrap around about circa every 11.9 hours.
+ */
+u32 dccp_timestamp(void)
+{
+       s64 delta = ktime_us_delta(ktime_get_real(), dccp_timestamp_seed);
+
+       do_div(delta, 10);
+       return delta;
+}
+EXPORT_SYMBOL_GPL(dccp_timestamp);
+
+void __init dccp_timestamping_init(void)
+{
+       dccp_timestamp_seed = ktime_get_real();
+}