From 3b948ae5be5e22532584113e2e02029519bbad8f Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 5 Nov 2007 17:42:39 -0500 Subject: SUNRPC: Allow the client to detect if the TCP connection is closed Add an xprt->state bit to enable the TCP ->state_change() method to signal whether or not the TCP connection is in the process of closing down. This will to be used by the reconnection logic in a separate patch. Signed-off-by: Trond Myklebust --- net/sunrpc/xprtsock.c | 24 +++++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) (limited to 'net') diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index b5544514ee57..721c5419765e 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -758,7 +758,9 @@ static void xs_close(struct rpc_xprt *xprt) sock_release(sock); clear_close_wait: smp_mb__before_clear_bit(); + clear_bit(XPRT_CONNECTED, &xprt->state); clear_bit(XPRT_CLOSE_WAIT, &xprt->state); + clear_bit(XPRT_CLOSING, &xprt->state); smp_mb__after_clear_bit(); } @@ -1118,12 +1120,28 @@ static void xs_tcp_state_change(struct sock *sk) } spin_unlock_bh(&xprt->transport_lock); break; - case TCP_SYN_SENT: - case TCP_SYN_RECV: + case TCP_FIN_WAIT1: + /* The client initiated a shutdown of the socket */ + set_bit(XPRT_CLOSING, &xprt->state); + smp_mb__before_clear_bit(); + clear_bit(XPRT_CONNECTED, &xprt->state); + smp_mb__after_clear_bit(); break; case TCP_CLOSE_WAIT: + /* The server initiated a shutdown of the socket */ + set_bit(XPRT_CLOSING, &xprt->state); xprt_force_disconnect(xprt); - default: + break; + case TCP_LAST_ACK: + smp_mb__before_clear_bit(); + clear_bit(XPRT_CONNECTED, &xprt->state); + smp_mb__after_clear_bit(); + break; + case TCP_CLOSE: + smp_mb__before_clear_bit(); + clear_bit(XPRT_CLOSING, &xprt->state); + smp_mb__after_clear_bit(); + /* Mark transport as closed and wake up all pending tasks */ xprt_disconnect(xprt); } out: -- cgit v1.2.3