Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161008Ab2JSDDS (ORCPT ); Thu, 18 Oct 2012 23:03:18 -0400 Received: from mail.kernel.org ([198.145.19.201]:52112 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964883Ab2JSCss (ORCPT ); Thu, 18 Oct 2012 22:48:48 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg Kroah-Hartman , alan@lxorguk.ukuu.org.uk, Trond Myklebust , Simon Kirby Subject: [ 28/76] SUNRPC: Ensure that the TCP socket is closed when in CLOSE_WAIT Date: Thu, 18 Oct 2012 19:46:52 -0700 Message-Id: <20121019024354.651015115@linuxfoundation.org> X-Mailer: git-send-email 1.8.0.rc0.18.gf84667d In-Reply-To: <20121019024350.087156547@linuxfoundation.org> References: <20121019024350.087156547@linuxfoundation.org> User-Agent: quilt/0.60-2.1.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3080 Lines: 92 3.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Trond Myklebust commit a519fc7a70d1a918574bb826cc6905b87b482eb9 upstream. Instead of doing a shutdown() call, we need to do an actual close(). Ditto if/when the server is sending us junk RPC headers. Signed-off-by: Trond Myklebust Tested-by: Simon Kirby Signed-off-by: Greg Kroah-Hartman --- net/sunrpc/xprtsock.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -1025,6 +1025,16 @@ static void xs_udp_data_ready(struct soc read_unlock_bh(&sk->sk_callback_lock); } +/* + * Helper function to force a TCP close if the server is sending + * junk and/or it has put us in CLOSE_WAIT + */ +static void xs_tcp_force_close(struct rpc_xprt *xprt) +{ + set_bit(XPRT_CONNECTION_CLOSE, &xprt->state); + xprt_force_disconnect(xprt); +} + static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, struct xdr_skb_reader *desc) { struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); @@ -1051,7 +1061,7 @@ static inline void xs_tcp_read_fraghdr(s /* Sanity check of the record length */ if (unlikely(transport->tcp_reclen < 8)) { dprintk("RPC: invalid TCP record fragment length\n"); - xprt_force_disconnect(xprt); + xs_tcp_force_close(xprt); return; } dprintk("RPC: reading TCP record fragment of length %d\n", @@ -1132,7 +1142,7 @@ static inline void xs_tcp_read_calldir(s break; default: dprintk("RPC: invalid request message type\n"); - xprt_force_disconnect(&transport->xprt); + xs_tcp_force_close(&transport->xprt); } xs_tcp_check_fraghdr(transport); } @@ -1455,6 +1465,8 @@ static void xs_tcp_cancel_linger_timeout static void xs_sock_mark_closed(struct rpc_xprt *xprt) { smp_mb__before_clear_bit(); + clear_bit(XPRT_CONNECTION_ABORT, &xprt->state); + clear_bit(XPRT_CONNECTION_CLOSE, &xprt->state); clear_bit(XPRT_CLOSE_WAIT, &xprt->state); clear_bit(XPRT_CLOSING, &xprt->state); smp_mb__after_clear_bit(); @@ -1512,8 +1524,8 @@ static void xs_tcp_state_change(struct s break; case TCP_CLOSE_WAIT: /* The server initiated a shutdown of the socket */ - xprt_force_disconnect(xprt); xprt->connect_cookie++; + xs_tcp_force_close(xprt); case TCP_CLOSING: /* * If the server closed down the connection, make sure that @@ -2199,8 +2211,7 @@ static void xs_tcp_setup_socket(struct w /* We're probably in TIME_WAIT. Get rid of existing socket, * and retry */ - set_bit(XPRT_CONNECTION_CLOSE, &xprt->state); - xprt_force_disconnect(xprt); + xs_tcp_force_close(xprt); break; case -ECONNREFUSED: case -ECONNRESET: -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/