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Diffstat (limited to 'net/ipv4/tcp_timer.c')
-rw-r--r--net/ipv4/tcp_timer.c165
1 files changed, 87 insertions, 78 deletions
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 0084227438c..0b71380ee42 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -36,9 +36,9 @@ static void tcp_write_timer(unsigned long);
static void tcp_delack_timer(unsigned long);
static void tcp_keepalive_timer (unsigned long data);
-#ifdef TCP_DEBUG
-const char tcp_timer_bug_msg[] = KERN_DEBUG "tcpbug: unknown timer value\n";
-EXPORT_SYMBOL(tcp_timer_bug_msg);
+#ifdef INET_CSK_DEBUG
+const char inet_csk_timer_bug_msg[] = "inet_csk BUG: unknown timer value\n";
+EXPORT_SYMBOL(inet_csk_timer_bug_msg);
#endif
/*
@@ -46,40 +46,45 @@ EXPORT_SYMBOL(tcp_timer_bug_msg);
* We may wish use just one timer maintaining a list of expire jiffies
* to optimize.
*/
-
-void tcp_init_xmit_timers(struct sock *sk)
+void inet_csk_init_xmit_timers(struct sock *sk,
+ void (*retransmit_handler)(unsigned long),
+ void (*delack_handler)(unsigned long),
+ void (*keepalive_handler)(unsigned long))
{
- struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
- init_timer(&tp->retransmit_timer);
- tp->retransmit_timer.function=&tcp_write_timer;
- tp->retransmit_timer.data = (unsigned long) sk;
- tp->pending = 0;
+ init_timer(&icsk->icsk_retransmit_timer);
+ init_timer(&icsk->icsk_delack_timer);
+ init_timer(&sk->sk_timer);
- init_timer(&tp->delack_timer);
- tp->delack_timer.function=&tcp_delack_timer;
- tp->delack_timer.data = (unsigned long) sk;
- tp->ack.pending = 0;
+ icsk->icsk_retransmit_timer.function = retransmit_handler;
+ icsk->icsk_delack_timer.function = delack_handler;
+ sk->sk_timer.function = keepalive_handler;
- init_timer(&sk->sk_timer);
- sk->sk_timer.function = &tcp_keepalive_timer;
- sk->sk_timer.data = (unsigned long)sk;
+ icsk->icsk_retransmit_timer.data =
+ icsk->icsk_delack_timer.data =
+ sk->sk_timer.data = (unsigned long)sk;
+
+ icsk->icsk_pending = icsk->icsk_ack.pending = 0;
}
-void tcp_clear_xmit_timers(struct sock *sk)
+void inet_csk_clear_xmit_timers(struct sock *sk)
{
- struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
- tp->pending = 0;
- sk_stop_timer(sk, &tp->retransmit_timer);
-
- tp->ack.pending = 0;
- tp->ack.blocked = 0;
- sk_stop_timer(sk, &tp->delack_timer);
+ icsk->icsk_pending = icsk->icsk_ack.pending = icsk->icsk_ack.blocked = 0;
+ sk_stop_timer(sk, &icsk->icsk_retransmit_timer);
+ sk_stop_timer(sk, &icsk->icsk_delack_timer);
sk_stop_timer(sk, &sk->sk_timer);
}
+void tcp_init_xmit_timers(struct sock *sk)
+{
+ inet_csk_init_xmit_timers(sk, &tcp_write_timer, &tcp_delack_timer,
+ &tcp_keepalive_timer);
+}
+
static void tcp_write_err(struct sock *sk)
{
sk->sk_err = sk->sk_err_soft ? : ETIMEDOUT;
@@ -155,15 +160,15 @@ static int tcp_orphan_retries(struct sock *sk, int alive)
/* A write timeout has occurred. Process the after effects. */
static int tcp_write_timeout(struct sock *sk)
{
- struct tcp_sock *tp = tcp_sk(sk);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
int retry_until;
if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
- if (tp->retransmits)
+ if (icsk->icsk_retransmits)
dst_negative_advice(&sk->sk_dst_cache);
- retry_until = tp->syn_retries ? : sysctl_tcp_syn_retries;
+ retry_until = icsk->icsk_syn_retries ? : sysctl_tcp_syn_retries;
} else {
- if (tp->retransmits >= sysctl_tcp_retries1) {
+ if (icsk->icsk_retransmits >= sysctl_tcp_retries1) {
/* NOTE. draft-ietf-tcpimpl-pmtud-01.txt requires pmtu black
hole detection. :-(
@@ -189,16 +194,16 @@ static int tcp_write_timeout(struct sock *sk)
retry_until = sysctl_tcp_retries2;
if (sock_flag(sk, SOCK_DEAD)) {
- int alive = (tp->rto < TCP_RTO_MAX);
+ const int alive = (icsk->icsk_rto < TCP_RTO_MAX);
retry_until = tcp_orphan_retries(sk, alive);
- if (tcp_out_of_resources(sk, alive || tp->retransmits < retry_until))
+ if (tcp_out_of_resources(sk, alive || icsk->icsk_retransmits < retry_until))
return 1;
}
}
- if (tp->retransmits >= retry_until) {
+ if (icsk->icsk_retransmits >= retry_until) {
/* Has it gone just too far? */
tcp_write_err(sk);
return 1;
@@ -210,26 +215,27 @@ static void tcp_delack_timer(unsigned long data)
{
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. */
- tp->ack.blocked = 1;
+ icsk->icsk_ack.blocked = 1;
NET_INC_STATS_BH(LINUX_MIB_DELAYEDACKLOCKED);
- sk_reset_timer(sk, &tp->delack_timer, jiffies + TCP_DELACK_MIN);
+ sk_reset_timer(sk, &icsk->icsk_delack_timer, jiffies + TCP_DELACK_MIN);
goto out_unlock;
}
sk_stream_mem_reclaim(sk);
- if (sk->sk_state == TCP_CLOSE || !(tp->ack.pending & TCP_ACK_TIMER))
+ if (sk->sk_state == TCP_CLOSE || !(icsk->icsk_ack.pending & ICSK_ACK_TIMER))
goto out;
- if (time_after(tp->ack.timeout, jiffies)) {
- sk_reset_timer(sk, &tp->delack_timer, tp->ack.timeout);
+ if (time_after(icsk->icsk_ack.timeout, jiffies)) {
+ sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout);
goto out;
}
- tp->ack.pending &= ~TCP_ACK_TIMER;
+ icsk->icsk_ack.pending &= ~ICSK_ACK_TIMER;
if (!skb_queue_empty(&tp->ucopy.prequeue)) {
struct sk_buff *skb;
@@ -242,16 +248,16 @@ static void tcp_delack_timer(unsigned long data)
tp->ucopy.memory = 0;
}
- if (tcp_ack_scheduled(tp)) {
- if (!tp->ack.pingpong) {
+ if (inet_csk_ack_scheduled(sk)) {
+ if (!icsk->icsk_ack.pingpong) {
/* Delayed ACK missed: inflate ATO. */
- tp->ack.ato = min(tp->ack.ato << 1, tp->rto);
+ icsk->icsk_ack.ato = min(icsk->icsk_ack.ato << 1, icsk->icsk_rto);
} else {
/* Delayed ACK missed: leave pingpong mode and
* deflate ATO.
*/
- tp->ack.pingpong = 0;
- tp->ack.ato = TCP_ATO_MIN;
+ icsk->icsk_ack.pingpong = 0;
+ icsk->icsk_ack.ato = TCP_ATO_MIN;
}
tcp_send_ack(sk);
NET_INC_STATS_BH(LINUX_MIB_DELAYEDACKS);
@@ -294,7 +300,8 @@ static void tcp_probe_timer(struct sock *sk)
max_probes = sysctl_tcp_retries2;
if (sock_flag(sk, SOCK_DEAD)) {
- int alive = ((tp->rto<<tp->backoff) < TCP_RTO_MAX);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ const int alive = ((icsk->icsk_rto << icsk->icsk_backoff) < TCP_RTO_MAX);
max_probes = tcp_orphan_retries(sk, alive);
@@ -317,6 +324,7 @@ static void tcp_probe_timer(struct sock *sk)
static void tcp_retransmit_timer(struct sock *sk)
{
struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
if (!tp->packets_out)
goto out;
@@ -351,7 +359,7 @@ static void tcp_retransmit_timer(struct sock *sk)
if (tcp_write_timeout(sk))
goto out;
- if (tp->retransmits == 0) {
+ if (icsk->icsk_retransmits == 0) {
if (tp->ca_state == TCP_CA_Disorder || tp->ca_state == TCP_CA_Recovery) {
if (tp->rx_opt.sack_ok) {
if (tp->ca_state == TCP_CA_Recovery)
@@ -381,10 +389,10 @@ static void tcp_retransmit_timer(struct sock *sk)
/* Retransmission failed because of local congestion,
* do not backoff.
*/
- if (!tp->retransmits)
- tp->retransmits=1;
- tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS,
- min(tp->rto, TCP_RESOURCE_PROBE_INTERVAL));
+ if (!icsk->icsk_retransmits)
+ icsk->icsk_retransmits = 1;
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
+ min(icsk->icsk_rto, TCP_RESOURCE_PROBE_INTERVAL));
goto out;
}
@@ -403,13 +411,13 @@ static void tcp_retransmit_timer(struct sock *sk)
* implemented ftp to mars will work nicely. We will have to fix
* the 120 second clamps though!
*/
- tp->backoff++;
- tp->retransmits++;
+ icsk->icsk_backoff++;
+ icsk->icsk_retransmits++;
out_reset_timer:
- tp->rto = min(tp->rto << 1, TCP_RTO_MAX);
- tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS, tp->rto);
- if (tp->retransmits > sysctl_tcp_retries1)
+ icsk->icsk_rto = min(icsk->icsk_rto << 1, TCP_RTO_MAX);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, icsk->icsk_rto);
+ if (icsk->icsk_retransmits > sysctl_tcp_retries1)
__sk_dst_reset(sk);
out:;
@@ -418,32 +426,32 @@ out:;
static void tcp_write_timer(unsigned long data)
{
struct sock *sk = (struct sock*)data;
- struct tcp_sock *tp = tcp_sk(sk);
+ 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, &tp->retransmit_timer, jiffies + (HZ / 20));
+ sk_reset_timer(sk, &icsk->icsk_retransmit_timer, jiffies + (HZ / 20));
goto out_unlock;
}
- if (sk->sk_state == TCP_CLOSE || !tp->pending)
+ if (sk->sk_state == TCP_CLOSE || !icsk->icsk_pending)
goto out;
- if (time_after(tp->timeout, jiffies)) {
- sk_reset_timer(sk, &tp->retransmit_timer, tp->timeout);
+ if (time_after(icsk->icsk_timeout, jiffies)) {
+ sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout);
goto out;
}
- event = tp->pending;
- tp->pending = 0;
+ event = icsk->icsk_pending;
+ icsk->icsk_pending = 0;
switch (event) {
- case TCP_TIME_RETRANS:
+ case ICSK_TIME_RETRANS:
tcp_retransmit_timer(sk);
break;
- case TCP_TIME_PROBE0:
+ case ICSK_TIME_PROBE0:
tcp_probe_timer(sk);
break;
}
@@ -463,8 +471,9 @@ out_unlock:
static void tcp_synack_timer(struct sock *sk)
{
struct tcp_sock *tp = tcp_sk(sk);
- struct listen_sock *lopt = tp->accept_queue.listen_opt;
- int max_retries = tp->syn_retries ? : sysctl_tcp_synack_retries;
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ struct listen_sock *lopt = icsk->icsk_accept_queue.listen_opt;
+ int max_retries = icsk->icsk_syn_retries ? : sysctl_tcp_synack_retries;
int thresh = max_retries;
unsigned long now = jiffies;
struct request_sock **reqp, *req;
@@ -526,8 +535,8 @@ static void tcp_synack_timer(struct sock *sk)
}
/* Drop this request */
- tcp_synq_unlink(tp, req, reqp);
- reqsk_queue_removed(&tp->accept_queue, req);
+ inet_csk_reqsk_queue_unlink(sk, req, reqp);
+ reqsk_queue_removed(&icsk->icsk_accept_queue, req);
reqsk_free(req);
continue;
}
@@ -541,15 +550,15 @@ static void tcp_synack_timer(struct sock *sk)
lopt->clock_hand = i;
if (lopt->qlen)
- tcp_reset_keepalive_timer(sk, TCP_SYNQ_INTERVAL);
+ inet_csk_reset_keepalive_timer(sk, TCP_SYNQ_INTERVAL);
}
-void tcp_delete_keepalive_timer (struct sock *sk)
+void inet_csk_delete_keepalive_timer(struct sock *sk)
{
sk_stop_timer(sk, &sk->sk_timer);
}
-void tcp_reset_keepalive_timer (struct sock *sk, unsigned long len)
+void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long len)
{
sk_reset_timer(sk, &sk->sk_timer, jiffies + len);
}
@@ -560,9 +569,9 @@ void tcp_set_keepalive(struct sock *sk, int val)
return;
if (val && !sock_flag(sk, SOCK_KEEPOPEN))
- tcp_reset_keepalive_timer(sk, keepalive_time_when(tcp_sk(sk)));
+ inet_csk_reset_keepalive_timer(sk, keepalive_time_when(tcp_sk(sk)));
else if (!val)
- tcp_delete_keepalive_timer(sk);
+ inet_csk_delete_keepalive_timer(sk);
}
@@ -576,7 +585,7 @@ static void tcp_keepalive_timer (unsigned long data)
bh_lock_sock(sk);
if (sock_owned_by_user(sk)) {
/* Try again later. */
- tcp_reset_keepalive_timer (sk, HZ/20);
+ inet_csk_reset_keepalive_timer (sk, HZ/20);
goto out;
}
@@ -587,7 +596,7 @@ static void tcp_keepalive_timer (unsigned long data)
if (sk->sk_state == TCP_FIN_WAIT2 && sock_flag(sk, SOCK_DEAD)) {
if (tp->linger2 >= 0) {
- int tmo = tcp_fin_time(tp) - TCP_TIMEWAIT_LEN;
+ const int tmo = tcp_fin_time(sk) - TCP_TIMEWAIT_LEN;
if (tmo > 0) {
tcp_time_wait(sk, TCP_FIN_WAIT2, tmo);
@@ -634,7 +643,7 @@ static void tcp_keepalive_timer (unsigned long data)
sk_stream_mem_reclaim(sk);
resched:
- tcp_reset_keepalive_timer (sk, elapsed);
+ inet_csk_reset_keepalive_timer (sk, elapsed);
goto out;
death:
@@ -645,7 +654,7 @@ out:
sock_put(sk);
}
-EXPORT_SYMBOL(tcp_clear_xmit_timers);
-EXPORT_SYMBOL(tcp_delete_keepalive_timer);
+EXPORT_SYMBOL(inet_csk_clear_xmit_timers);
+EXPORT_SYMBOL(inet_csk_delete_keepalive_timer);
EXPORT_SYMBOL(tcp_init_xmit_timers);
-EXPORT_SYMBOL(tcp_reset_keepalive_timer);
+EXPORT_SYMBOL(inet_csk_reset_keepalive_timer);