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-rw-r--r--include/net/inet_connection_sock.h3
-rw-r--r--net/ipv4/inet_connection_sock.c1
-rw-r--r--net/ipv4/tcp.c1
-rw-r--r--net/ipv4/tcp_input.c1
-rw-r--r--net/ipv4/tcp_output.c1
-rw-r--r--net/ipv4/tcp_timer.c14
6 files changed, 14 insertions, 7 deletions
diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
index 7338b3865a2a..111d7771b208 100644
--- a/include/net/inet_connection_sock.h
+++ b/include/net/inet_connection_sock.h
@@ -76,6 +76,8 @@ struct inet_connection_sock_af_ops {
* @icsk_ext_hdr_len: Network protocol overhead (IP/IPv6 options)
* @icsk_ack: Delayed ACK control data
* @icsk_mtup; MTU probing control data
+ * @icsk_probes_tstamp: Probe timestamp (cleared by non-zero window ack)
+ * @icsk_user_timeout: TCP_USER_TIMEOUT value
*/
struct inet_connection_sock {
/* inet_sock has to be the first member! */
@@ -129,6 +131,7 @@ struct inet_connection_sock {
u32 probe_timestamp;
} icsk_mtup;
+ u32 icsk_probes_tstamp;
u32 icsk_user_timeout;
u64 icsk_ca_priv[104 / sizeof(u64)];
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index fd8b8800a2c3..6bd7ca09af03 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -851,6 +851,7 @@ struct sock *inet_csk_clone_lock(const struct sock *sk,
newicsk->icsk_retransmits = 0;
newicsk->icsk_backoff = 0;
newicsk->icsk_probes_out = 0;
+ newicsk->icsk_probes_tstamp = 0;
/* Deinitialize accept_queue to trap illegal accesses. */
memset(&newicsk->icsk_accept_queue, 0, sizeof(newicsk->icsk_accept_queue));
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index ed42d2193c5c..32545ecf2ab1 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2937,6 +2937,7 @@ int tcp_disconnect(struct sock *sk, int flags)
icsk->icsk_backoff = 0;
icsk->icsk_probes_out = 0;
+ icsk->icsk_probes_tstamp = 0;
icsk->icsk_rto = TCP_TIMEOUT_INIT;
icsk->icsk_rto_min = TCP_RTO_MIN;
icsk->icsk_delack_max = TCP_DELACK_MAX;
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index c7e16b0ed791..bafcab75f425 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -3384,6 +3384,7 @@ static void tcp_ack_probe(struct sock *sk)
return;
if (!after(TCP_SKB_CB(head)->end_seq, tcp_wnd_end(tp))) {
icsk->icsk_backoff = 0;
+ icsk->icsk_probes_tstamp = 0;
inet_csk_clear_xmit_timer(sk, ICSK_TIME_PROBE0);
/* Socket must be waked up by subsequent tcp_data_snd_check().
* This function is not for random using!
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index f322e798a351..ab458697881e 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -4084,6 +4084,7 @@ void tcp_send_probe0(struct sock *sk)
/* Cancel probe timer, if it is not required. */
icsk->icsk_probes_out = 0;
icsk->icsk_backoff = 0;
+ icsk->icsk_probes_tstamp = 0;
return;
}
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 6c62b9ea1320..454732ecc8f3 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -349,6 +349,7 @@ static void tcp_probe_timer(struct sock *sk)
if (tp->packets_out || !skb) {
icsk->icsk_probes_out = 0;
+ icsk->icsk_probes_tstamp = 0;
return;
}
@@ -360,13 +361,12 @@ static void tcp_probe_timer(struct sock *sk)
* corresponding system limit. We also implement similar policy when
* we use RTO to probe window in tcp_retransmit_timer().
*/
- if (icsk->icsk_user_timeout) {
- u32 elapsed = tcp_model_timeout(sk, icsk->icsk_probes_out,
- tcp_probe0_base(sk));
-
- if (elapsed >= icsk->icsk_user_timeout)
- goto abort;
- }
+ if (!icsk->icsk_probes_tstamp)
+ icsk->icsk_probes_tstamp = tcp_jiffies32;
+ else if (icsk->icsk_user_timeout &&
+ (s32)(tcp_jiffies32 - icsk->icsk_probes_tstamp) >=
+ msecs_to_jiffies(icsk->icsk_user_timeout))
+ goto abort;
max_probes = sock_net(sk)->ipv4.sysctl_tcp_retries2;
if (sock_flag(sk, SOCK_DEAD)) {