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Date: Mon, 18 Mar 2013 21:50:26 +0900
From: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
To: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <eric.dumazet@...il.com>, netdev@...r.kernel.org
Cc: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
Subject: [PATCH v2 4/4] inet_diag: fix FIN_WAIT2 timer expression in
inet_diag
This is a change similar to the patch for /proc/net/tcp.
FIN_WAIT2 timers for orphaned sockets are also shown in inet_diag.
There will be no keepalive timer for orphand FIN_WAIT2 sockets by
this change.
Besides, timer calculation of an inet_connection_sock is splitted
into two pieces because few common codes remain between timer
calculation of a tcp_sock and a dccp_sock: Special handling with
FIN_WAIT2 is needed for a tcp_sock, and consideration of
ICSK_TIME_PROBE0 is unnecessary for a dccp_sock.
Signed-off-by: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
---
include/linux/inet_diag.h | 2 ++
net/dccp/diag.c | 15 +++++++++++++++
net/ipv4/inet_diag.c | 20 --------------------
net/ipv4/tcp_diag.c | 27 +++++++++++++++++++++++++++
4 files changed, 44 insertions(+), 20 deletions(-)
diff --git a/include/linux/inet_diag.h b/include/linux/inet_diag.h
index 46da024..f7f359e 100644
--- a/include/linux/inet_diag.h
+++ b/include/linux/inet_diag.h
@@ -1,6 +1,7 @@
#ifndef _INET_DIAG_H_
#define _INET_DIAG_H_ 1
+#include <linux/kernel.h>
#include <uapi/linux/inet_diag.h>
struct sock;
@@ -27,6 +28,7 @@ struct inet_diag_handler {
};
struct inet_connection_sock;
+#define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
struct sk_buff *skb, struct inet_diag_req_v2 *req,
struct user_namespace *user_ns,
diff --git a/net/dccp/diag.c b/net/dccp/diag.c
index 028fc43..b979a5b 100644
--- a/net/dccp/diag.c
+++ b/net/dccp/diag.c
@@ -42,6 +42,21 @@ static void dccp_get_info(struct sock *sk, struct tcp_info *info)
static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
void *_info)
{
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+
+ if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
+ r->idiag_timer = 1;
+ r->idiag_retrans = icsk->icsk_retransmits;
+ r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
+ } else if (timer_pending(&sk->sk_timer)) {
+ r->idiag_timer = 2;
+ r->idiag_retrans = icsk->icsk_probes_out;
+ r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
+ } else {
+ r->idiag_timer = 0;
+ r->idiag_expires = 0;
+ }
+
r->idiag_rqueue = r->idiag_wqueue = 0;
if (_info != NULL)
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index 7afa2c3..32c22a7 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -156,26 +156,6 @@ int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
goto out;
}
-#define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
-
- if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
- r->idiag_timer = 1;
- r->idiag_retrans = icsk->icsk_retransmits;
- r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
- } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
- r->idiag_timer = 4;
- r->idiag_retrans = icsk->icsk_probes_out;
- r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
- } else if (timer_pending(&sk->sk_timer)) {
- r->idiag_timer = 2;
- r->idiag_retrans = icsk->icsk_probes_out;
- r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
- } else {
- r->idiag_timer = 0;
- r->idiag_expires = 0;
- }
-#undef EXPIRES_IN_MS
-
if (ext & (1 << (INET_DIAG_INFO - 1))) {
attr = nla_reserve(skb, INET_DIAG_INFO,
sizeof(struct tcp_info));
diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c
index ed3f2ad..120a4250 100644
--- a/net/ipv4/tcp_diag.c
+++ b/net/ipv4/tcp_diag.c
@@ -20,9 +20,36 @@
static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
void *_info)
{
+ const struct inet_connection_sock *icsk = inet_csk(sk);
const struct tcp_sock *tp = tcp_sk(sk);
struct tcp_info *info = _info;
+ if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
+ r->idiag_timer = 1;
+ r->idiag_retrans = icsk->icsk_retransmits;
+ r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
+ } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
+ r->idiag_timer = 4;
+ r->idiag_retrans = icsk->icsk_probes_out;
+ r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
+ } else if (timer_pending(&sk->sk_timer)) {
+ if (sk->sk_state == TCP_FIN_WAIT2 && sock_flag(sk, SOCK_DEAD)) {
+ const unsigned long timer_expires =
+ sk->sk_timer.expires +
+ (tp->linger2 >= 0 ? TCP_TIMEWAIT_LEN : 0);
+
+ r->idiag_timer = 3;
+ r->idiag_expires = EXPIRES_IN_MS(timer_expires);
+ } else {
+ r->idiag_timer = 2;
+ r->idiag_retrans = icsk->icsk_probes_out;
+ r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
+ }
+ } else {
+ r->idiag_timer = 0;
+ r->idiag_expires = 0;
+ }
+
if (sk->sk_state == TCP_LISTEN) {
r->idiag_rqueue = sk->sk_ack_backlog;
r->idiag_wqueue = sk->sk_max_ack_backlog;
--
1.7.10.4
--
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