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Diffstat (limited to 'net/ipv4/tcp_timer.c')
-rw-r--r--net/ipv4/tcp_timer.c70
1 files changed, 37 insertions, 33 deletions
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index e911e6c523ec..6df36ad55a38 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -32,17 +32,6 @@ int sysctl_tcp_retries2 __read_mostly = TCP_RETR2;
int sysctl_tcp_orphan_retries __read_mostly;
int sysctl_tcp_thin_linear_timeouts __read_mostly;
-static void tcp_write_timer(unsigned long);
-static void tcp_delack_timer(unsigned long);
-static void tcp_keepalive_timer (unsigned long data);
-
-void tcp_init_xmit_timers(struct sock *sk)
-{
- inet_csk_init_xmit_timers(sk, &tcp_write_timer, &tcp_delack_timer,
- &tcp_keepalive_timer);
-}
-EXPORT_SYMBOL(tcp_init_xmit_timers);
-
static void tcp_write_err(struct sock *sk)
{
sk->sk_err = sk->sk_err_soft ? : ETIMEDOUT;
@@ -205,21 +194,11 @@ static int tcp_write_timeout(struct sock *sk)
return 0;
}
-static void tcp_delack_timer(unsigned long data)
+void tcp_delack_timer_handler(struct sock *sk)
{
- struct sock *sk = (struct sock *)data;
struct tcp_sock *tp = tcp_sk(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
- bh_lock_sock(sk);
- if (sock_owned_by_user(sk)) {
- /* Try again later. */
- icsk->icsk_ack.blocked = 1;
- NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_DELAYEDACKLOCKED);
- sk_reset_timer(sk, &icsk->icsk_delack_timer, jiffies + TCP_DELACK_MIN);
- goto out_unlock;
- }
-
sk_mem_reclaim_partial(sk);
if (sk->sk_state == TCP_CLOSE || !(icsk->icsk_ack.pending & ICSK_ACK_TIMER))
@@ -260,7 +239,21 @@ static void tcp_delack_timer(unsigned long data)
out:
if (sk_under_memory_pressure(sk))
sk_mem_reclaim(sk);
-out_unlock:
+}
+
+static void tcp_delack_timer(unsigned long data)
+{
+ struct sock *sk = (struct sock *)data;
+
+ bh_lock_sock(sk);
+ if (!sock_owned_by_user(sk)) {
+ tcp_delack_timer_handler(sk);
+ } else {
+ inet_csk(sk)->icsk_ack.blocked = 1;
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_DELAYEDACKLOCKED);
+ /* deleguate our work to tcp_release_cb() */
+ set_bit(TCP_WRITE_TIMER_DEFERRED, &tcp_sk(sk)->tsq_flags);
+ }
bh_unlock_sock(sk);
sock_put(sk);
}
@@ -450,19 +443,11 @@ out_reset_timer:
out:;
}
-static void tcp_write_timer(unsigned long data)
+void tcp_write_timer_handler(struct sock *sk)
{
- struct sock *sk = (struct sock *)data;
struct inet_connection_sock *icsk = inet_csk(sk);
int event;
- bh_lock_sock(sk);
- if (sock_owned_by_user(sk)) {
- /* Try again later */
- sk_reset_timer(sk, &icsk->icsk_retransmit_timer, jiffies + (HZ / 20));
- goto out_unlock;
- }
-
if (sk->sk_state == TCP_CLOSE || !icsk->icsk_pending)
goto out;
@@ -485,7 +470,19 @@ static void tcp_write_timer(unsigned long data)
out:
sk_mem_reclaim(sk);
-out_unlock:
+}
+
+static void tcp_write_timer(unsigned long data)
+{
+ struct sock *sk = (struct sock *)data;
+
+ bh_lock_sock(sk);
+ if (!sock_owned_by_user(sk)) {
+ tcp_write_timer_handler(sk);
+ } else {
+ /* deleguate our work to tcp_release_cb() */
+ set_bit(TCP_WRITE_TIMER_DEFERRED, &tcp_sk(sk)->tsq_flags);
+ }
bh_unlock_sock(sk);
sock_put(sk);
}
@@ -602,3 +599,10 @@ out:
bh_unlock_sock(sk);
sock_put(sk);
}
+
+void tcp_init_xmit_timers(struct sock *sk)
+{
+ inet_csk_init_xmit_timers(sk, &tcp_write_timer, &tcp_delack_timer,
+ &tcp_keepalive_timer);
+}
+EXPORT_SYMBOL(tcp_init_xmit_timers);
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