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tipc: refactor tipc_sk_timeout() function 

The function tipc_sk_timeout() is more complex than necessary, and
even seems to contain an undetected bug. At one of the occurences
where we renew the timer we just order it with (HZ / 20), instead
of (jiffies + HZ / 20);

In this commit we clean up the function.

Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Maloy 2017-10-20 11:21:32 +02:00 committed by David S. Miller
parent 36341de257
commit 0d5fcebf3c
1 changed files with 24 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
net/tipc/socket.c
View File

@ -48,7 +48,7 @@
#include "group.h"
#define CONN_TIMEOUT_DEFAULT 8000 /* default connect timeout = 8s */
#define CONN_PROBING_INTERVAL msecs_to_jiffies(3600000) /* [ms] => 1 h */
#define CONN_PROBING_INTV msecs_to_jiffies(3600000) /* [ms] => 1 h */
#define TIPC_FWD_MSG 1
#define TIPC_MAX_PORT 0xffffffff
#define TIPC_MIN_PORT 1
@ -1472,7 +1472,7 @@ static void tipc_sk_finish_conn(struct tipc_sock *tsk, u32 peer_port,
msg_set_lookup_scope(msg, 0);
msg_set_hdr_sz(msg, SHORT_H_SIZE);
sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL);
sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV);
tipc_set_sk_state(sk, TIPC_ESTABLISHED);
tipc_node_add_conn(net, peer_node, tsk->portid, peer_port);
tsk->max_pkt = tipc_node_get_mtu(net, peer_node, tsk->portid);
@ -2533,43 +2533,40 @@ static int tipc_shutdown(struct socket *sock, int how)
static void tipc_sk_timeout(unsigned long data)
{
struct tipc_sock *tsk = (struct tipc_sock *)data;
struct sock *sk = &tsk->sk;
struct sk_buff *skb = NULL;
u32 peer_port, peer_node;
u32 peer_port = tsk_peer_port(tsk);
u32 peer_node = tsk_peer_node(tsk);
u32 own_node = tsk_own_node(tsk);
u32 own_port = tsk->portid;
struct sock *sk = &tsk->sk;
struct net *net = sock_net(sk);
struct sk_buff *skb = NULL;
bh_lock_sock(sk);
if (!tipc_sk_connected(sk)) {
bh_unlock_sock(sk);
if (!tipc_sk_connected(sk))
goto exit;
/* Try again later if socket is busy */
if (sock_owned_by_user(sk)) {
sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ / 20);
goto exit;
}
peer_port = tsk_peer_port(tsk);
peer_node = tsk_peer_node(tsk);
if (tsk->probe_unacked) {
if (!sock_owned_by_user(sk)) {
tipc_set_sk_state(sk, TIPC_DISCONNECTING);
tipc_node_remove_conn(sock_net(sk), tsk_peer_node(tsk),
tsk_peer_port(tsk));
sk->sk_state_change(sk);
} else {
/* Try again later */
sk_reset_timer(sk, &sk->sk_timer, (HZ / 20));
}
bh_unlock_sock(sk);
tipc_set_sk_state(sk, TIPC_DISCONNECTING);
tipc_node_remove_conn(net, peer_node, peer_port);
sk->sk_state_change(sk);
goto exit;
}
skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE,
INT_H_SIZE, 0, peer_node, own_node,
peer_port, tsk->portid, TIPC_OK);
/* Send new probe */
skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE, 0,
peer_node, own_node, peer_port, own_port,
TIPC_OK);
tsk->probe_unacked = true;
sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTERVAL);
sk_reset_timer(sk, &sk->sk_timer, jiffies + CONN_PROBING_INTV);
exit:
bh_unlock_sock(sk);
if (skb)
tipc_node_xmit_skb(sock_net(sk), skb, peer_node, tsk->portid);
exit:
tipc_node_xmit_skb(net, skb, peer_node, own_port);
sock_put(sk);
}