Return-Path: Received: from mail-it0-f65.google.com ([209.85.214.65]:55822 "EHLO mail-it0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728072AbeIJUEM (ORCPT ); Mon, 10 Sep 2018 16:04:12 -0400 Subject: [PATCH v1 08/22] sunrpc: Fix connect metrics From: Chuck Lever To: linux-rdma@vger.kernel.org, linux-nfs@vger.kernel.org Date: Mon, 10 Sep 2018 11:09:38 -0400 Message-ID: <20180910150937.10564.26277.stgit@manet.1015granger.net> In-Reply-To: <20180910150040.10564.97487.stgit@manet.1015granger.net> References: <20180910150040.10564.97487.stgit@manet.1015granger.net> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Sender: linux-nfs-owner@vger.kernel.org List-ID: For TCP, the logic in xprt_connect_status is currently never invoked to record a successful connection. Commit 2a4919919a97 ("SUNRPC: Return EAGAIN instead of ENOTCONN when waking up xprt->pending") changed the way TCP xprt's are awoken after a connect succeeds. Instead, change connection-oriented transports to bump connect_count and compute connect_time the moment that XPRT_CONNECTED is set. Signed-off-by: Chuck Lever --- net/sunrpc/xprt.c | 10 +++------- net/sunrpc/xprtrdma/transport.c | 6 +++++- net/sunrpc/xprtsock.c | 10 ++++++---- 3 files changed, 14 insertions(+), 12 deletions(-) diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index a8db2e3f..f03ffa2 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -791,15 +791,11 @@ static void xprt_connect_status(struct rpc_task *task) { struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt; - if (task->tk_status == 0) { - xprt->stat.connect_count++; - xprt->stat.connect_time += (long)jiffies - xprt->stat.connect_start; + switch (task->tk_status) { + case 0: dprintk("RPC: %5u xprt_connect_status: connection established\n", task->tk_pid); - return; - } - - switch (task->tk_status) { + break; case -ECONNREFUSED: case -ECONNRESET: case -ECONNABORTED: diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c index 3ae73e6..087acfc 100644 --- a/net/sunrpc/xprtrdma/transport.c +++ b/net/sunrpc/xprtrdma/transport.c @@ -242,8 +242,12 @@ spin_lock_bh(&xprt->transport_lock); if (ep->rep_connected > 0) { - if (!xprt_test_and_set_connected(xprt)) + if (!xprt_test_and_set_connected(xprt)) { + xprt->stat.connect_count++; + xprt->stat.connect_time += (long)jiffies - + xprt->stat.connect_start; xprt_wake_pending_tasks(xprt, 0); + } } else { if (xprt_test_and_clear_connected(xprt)) xprt_wake_pending_tasks(xprt, -ENOTCONN); diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index 6b7539c..e146caa 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -1611,6 +1611,9 @@ static void xs_tcp_state_change(struct sock *sk) clear_bit(XPRT_SOCK_CONNECTING, &transport->sock_state); xprt_clear_connecting(xprt); + xprt->stat.connect_count++; + xprt->stat.connect_time += (long)jiffies - + xprt->stat.connect_start; xprt_wake_pending_tasks(xprt, -EAGAIN); } spin_unlock(&xprt->transport_lock); @@ -2029,8 +2032,6 @@ static int xs_local_finish_connecting(struct rpc_xprt *xprt, } /* Tell the socket layer to start connecting... */ - xprt->stat.connect_count++; - xprt->stat.connect_start = jiffies; return kernel_connect(sock, xs_addr(xprt), xprt->addrlen, 0); } @@ -2062,6 +2063,9 @@ static int xs_local_setup_socket(struct sock_xprt *transport) case 0: dprintk("RPC: xprt %p connected to %s\n", xprt, xprt->address_strings[RPC_DISPLAY_ADDR]); + xprt->stat.connect_count++; + xprt->stat.connect_time += (long)jiffies - + xprt->stat.connect_start; xprt_set_connected(xprt); case -ENOBUFS: break; @@ -2387,8 +2391,6 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) xs_set_memalloc(xprt); /* Tell the socket layer to start connecting... */ - xprt->stat.connect_count++; - xprt->stat.connect_start = jiffies; set_bit(XPRT_SOCK_CONNECTING, &transport->sock_state); ret = kernel_connect(sock, xs_addr(xprt), xprt->addrlen, O_NONBLOCK); switch (ret) {