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authorJunxiao Bi <junxiao.bi@oracle.com>2014-08-29 15:19:02 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-29 16:28:16 -0700
commit8e9801dfe37c9e68cdbfcd15988df2187191864e (patch)
tree27b0c2499e1a11a2ad5b8a8b1d0bfcae5f25cd8e /fs/ocfs2/cluster/tcp.c
parentc43c363def04cdaed0d9e26dae846081f55714e7 (diff)
downloadlinux-stericsson-8e9801dfe37c9e68cdbfcd15988df2187191864e.tar.gz
ocfs2: o2net: set tcp user timeout to max value
When tcp retransmit timeout(15mins), the connection will be closed. Pending messages may be lost during this time. So we set tcp user timeout to override the retransmit timeout to the max value. This is OK for ocfs2 since we have disk heartbeat, if peer crash, the disk heartbeat will timeout and it will be evicted, if disk heartbeat not timeout and connection idle for a long time, then this means the cluster enters split-brain state, since fence can't happen, we'd better keep the connection and wait network recover. Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com> Reviewed-by: Srinivas Eeda <srinivas.eeda@oracle.com> Reviewed-by: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Joseph Qi <joseph.qi@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/cluster/tcp.c')
-rw-r--r--fs/ocfs2/cluster/tcp.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c
index 2334bfc966c1..ea34952f9496 100644
--- a/fs/ocfs2/cluster/tcp.c
+++ b/fs/ocfs2/cluster/tcp.c
@@ -1480,6 +1480,14 @@ static int o2net_set_nodelay(struct socket *sock)
return ret;
}
+static int o2net_set_usertimeout(struct socket *sock)
+{
+ int user_timeout = O2NET_TCP_USER_TIMEOUT;
+
+ return kernel_setsockopt(sock, SOL_TCP, TCP_USER_TIMEOUT,
+ (char *)&user_timeout, sizeof(user_timeout));
+}
+
static void o2net_initialize_handshake(void)
{
o2net_hand->o2hb_heartbeat_timeout_ms = cpu_to_be32(
@@ -1663,6 +1671,12 @@ static void o2net_start_connect(struct work_struct *work)
goto out;
}
+ ret = o2net_set_usertimeout(sock);
+ if (ret) {
+ mlog(ML_ERROR, "set TCP_USER_TIMEOUT failed with %d\n", ret);
+ goto out;
+ }
+
o2net_register_callbacks(sc->sc_sock->sk, sc);
spin_lock(&nn->nn_lock);
@@ -1844,6 +1858,12 @@ static int o2net_accept_one(struct socket *sock, int *more)
goto out;
}
+ ret = o2net_set_usertimeout(new_sock);
+ if (ret) {
+ mlog(ML_ERROR, "set TCP_USER_TIMEOUT failed with %d\n", ret);
+ goto out;
+ }
+
slen = sizeof(sin);
ret = new_sock->ops->getname(new_sock, (struct sockaddr *) &sin,
&slen, 1);