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| 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 /net | |
| parent | 67a391d72ca7efb387c30ec761a487e50a3ff085 (diff) | |
| download | op-kernel-dev-3b948ae5be5e22532584113e2e02029519bbad8f.zip op-kernel-dev-3b948ae5be5e22532584113e2e02029519bbad8f.tar.gz | |
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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/xprtsock.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index b554451..721c541 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: |
