diff options
| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2007-11-05 17:42:39 -0500 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-01-30 02:05:25 -0500 |
| commit | 3b948ae5be5e22532584113e2e02029519bbad8f (patch) | |
| tree | 3bfa346bfbc9808c164d3d36af29a2090a5a0628 | |
| parent | 67a391d72ca7efb387c30ec761a487e50a3ff085 (diff) | |
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 <Trond.Myklebust@netapp.com>
| -rw-r--r-- | include/linux/sunrpc/xprt.h | 1 | ||||
| -rw-r--r-- | net/sunrpc/xprtsock.c | 24 |
2 files changed, 22 insertions, 3 deletions
diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index 6f524a9e7fd..afb9e6ad7fe 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -257,6 +257,7 @@ void xprt_force_disconnect(struct rpc_xprt *xprt); #define XPRT_CLOSE_WAIT (3) #define XPRT_BOUND (4) #define XPRT_BINDING (5) +#define XPRT_CLOSING (6) static inline void xprt_set_connected(struct rpc_xprt *xprt) { diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index b5544514ee5..721c5419765 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: |