| Message ID | tencent_BC846D74CA86E95DAC48E65686FEE6359C07@qq.com |
|---|---|
| State | New |
| Headers | show |
| Series | libceph: queue_con only if the sock is connected | expand |
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index d3bb656308b4..eef5d4dfd1f1 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -367,7 +367,8 @@ static void ceph_sock_write_space(struct sock *sk) * buffer. See net/ipv4/tcp_input.c:tcp_check_space() * and net/core/stream.c:sk_stream_write_space(). */ - if (ceph_con_flag_test(con, CEPH_CON_F_WRITE_PENDING)) { + if (ceph_con_flag_test(con, CEPH_CON_F_WRITE_PENDING) && + atomic_read(&con->sock_state) == CON_SOCK_STATE_CONNECTED) { if (sk_stream_is_writeable(sk)) { dout("%s %p queueing write work\n", __func__, con); clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
tcp_sendmsg_locked will trigger sk->sk_write_space while the sock is still connecting, if con try to write to a connecting sock, sk->sk_write_space will be called again, which lead to a endless loop. This will happen if the public network of the cluster is down, and the cpu will be in high usage. Signed-off-by: Chen Yuanrun <chen-yuanrun@foxmail.com> --- net/ceph/messenger.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)