From patchwork Thu May 21 14:34:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chuck Lever III X-Patchwork-Id: 11563105 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 35EF114C0 for ; Thu, 21 May 2020 14:34:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1D8DA207D8 for ; Thu, 21 May 2020 14:34:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="G8RntKae" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729650AbgEUOep (ORCPT ); Thu, 21 May 2020 10:34:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55634 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729598AbgEUOep (ORCPT ); Thu, 21 May 2020 10:34:45 -0400 Received: from mail-il1-x142.google.com (mail-il1-x142.google.com [IPv6:2607:f8b0:4864:20::142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E5C53C061A0E; Thu, 21 May 2020 07:34:43 -0700 (PDT) Received: by mail-il1-x142.google.com with SMTP id j3so7233692ilk.11; Thu, 21 May 2020 07:34:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:subject:from:to:cc:date:message-id:in-reply-to:references :user-agent:mime-version:content-transfer-encoding; bh=MV0EoO+8yVK6ghDt30lbfGE+CAEo1PY+DasnmJYde9U=; b=G8RntKaesu1Ue6ZrfH381IH5aL+JT9wLRt/aaOFxG+x8BznhR7j8iuOCoyc+q0dJdE gg4fA/uzUpZSaSBxt2/onEUf2O5NAYaDrFzr0y5APorf5MS+2TPbq/PZ09VxUwBLIxHE Q8Y2ZHoTC1NKQDF1CBBeZxWjbouFHQGZNwq9yO5B6VyIEVyM9oild5vWgmUe+PU0tCid NNMlLR1wTiI5vqYb/kv7Rt21PuWEJ4Ax7qUFymMsUK9Ad1QM8NfKQ6XORwDo+khU4SYE /1rxIi/MmF6oYI0Ec0S1bgvcY9r5IZ0ikwQLvDmO6ofFhqsNj8HSzt6g/k2fJ6Fyj/sP q8pg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:subject:from:to:cc:date:message-id :in-reply-to:references:user-agent:mime-version :content-transfer-encoding; bh=MV0EoO+8yVK6ghDt30lbfGE+CAEo1PY+DasnmJYde9U=; b=HXzF1yaaFxCB3sX8SCiS+I7KNUhUwnihsUl+DvpDkjWhYkqYKlluSKcWMI7x1jQ9oy w5qioqghaesDRND2tyNyQ3Q726LaYWV7yLKhhJYUdp7nVvK4QNOxGi1lVeSBRcT6PtTi sD9W/0l2Y/d83BRrSjislY994XMzruTt55stxwozsnmYtsQ9ldu/DLMnk+y096vkOaXY lv19RbMwz0jUtnXogj6zPjvalHGn6Lfbjpn9GlUUswbCpFBwHgRy4OLTc3o3fg1ixLGL fkyelhKAl7yTGLKdEX40JTTXDjG0iaxFq46ZDJ+ShP0YPeMwZ7aGOaqsdzjxRPSbfw7f ot+g== X-Gm-Message-State: AOAM531duEbDih20Fu100W44ILrCYUdYbyN6AzirnqINf3+WY1jc3Zim dbvu7UwqmkstJ1ulw9y0EoIN1SKs X-Google-Smtp-Source: ABdhPJxFZkxYPLr4GqIuy83cOI0Psj/hT9N1hpSb8ANW880PQ/5JwqwhA1c4n9UGC1pjiU95ROAqxQ== X-Received: by 2002:a92:48ca:: with SMTP id j71mr9258124ilg.25.1590071683122; Thu, 21 May 2020 07:34:43 -0700 (PDT) Received: from gateway.1015granger.net (c-68-61-232-219.hsd1.mi.comcast.net. [68.61.232.219]) by smtp.gmail.com with ESMTPSA id i13sm3130120ill.65.2020.05.21.07.34.42 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 21 May 2020 07:34:42 -0700 (PDT) Received: from klimt.1015granger.net (klimt.1015granger.net [192.168.1.55]) by gateway.1015granger.net (8.14.7/8.14.7) with ESMTP id 04LEYfN9000853; Thu, 21 May 2020 14:34:41 GMT Subject: [PATCH v3 11/32] svcrdma: Add tracepoints to report ->xpo_accept failures From: Chuck Lever To: bfields@fieldses.org Cc: linux-nfs@vger.kernel.org, linux-rdma@vger.kernel.org Date: Thu, 21 May 2020 10:34:41 -0400 Message-ID: <20200521143441.3557.26124.stgit@klimt.1015granger.net> In-Reply-To: <20200521141100.3557.17098.stgit@klimt.1015granger.net> References: <20200521141100.3557.17098.stgit@klimt.1015granger.net> User-Agent: StGit/0.22-31-g4b47 MIME-Version: 1.0 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Failure to accept a connection is typically due to a problem specific to a transport type. Also, ->xpo_accept returns NULL on error rather than reporting a specific problem. So, add failure-specific tracepoints in svc_rdma_accept(). Signed-off-by: Chuck Lever --- include/trace/events/rpcrdma.h | 38 +++++++++++++++++++++++++++++- net/sunrpc/xprtrdma/svc_rdma_transport.c | 27 +++++++++------------ 2 files changed, 48 insertions(+), 17 deletions(-) diff --git a/include/trace/events/rpcrdma.h b/include/trace/events/rpcrdma.h index 53b24c8c7860..79ef2ab7743c 100644 --- a/include/trace/events/rpcrdma.h +++ b/include/trace/events/rpcrdma.h @@ -1309,9 +1309,45 @@ DECLARE_EVENT_CLASS(svcrdma_xprt_event, TP_ARGS(xprt)) DEFINE_XPRT_EVENT(accept); -DEFINE_XPRT_EVENT(fail); DEFINE_XPRT_EVENT(free); +DECLARE_EVENT_CLASS(svcrdma_accept_class, + TP_PROTO( + const struct svcxprt_rdma *rdma, + long status + ), + + TP_ARGS(rdma, status), + + TP_STRUCT__entry( + __field(long, status) + __string(addr, rdma->sc_xprt.xpt_remotebuf) + ), + + TP_fast_assign( + __entry->status = status; + __assign_str(addr, rdma->sc_xprt.xpt_remotebuf); + ), + + TP_printk("addr=%s status=%ld", + __get_str(addr), __entry->status + ) +); + +#define DEFINE_ACCEPT_EVENT(name) \ + DEFINE_EVENT(svcrdma_accept_class, svcrdma_##name##_err, \ + TP_PROTO( \ + const struct svcxprt_rdma *rdma, \ + long status \ + ), \ + TP_ARGS(rdma, status)) + +DEFINE_ACCEPT_EVENT(pd); +DEFINE_ACCEPT_EVENT(qp); +DEFINE_ACCEPT_EVENT(fabric); +DEFINE_ACCEPT_EVENT(initdepth); +DEFINE_ACCEPT_EVENT(accept); + TRACE_DEFINE_ENUM(RDMA_MSG); TRACE_DEFINE_ENUM(RDMA_NOMSG); TRACE_DEFINE_ENUM(RDMA_MSGP); diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c index 0a1125277a48..f3b5ad2bec2f 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c @@ -410,9 +410,6 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) if (!newxprt) return NULL; - dprintk("svcrdma: newxprt from accept queue = %p, cm_id=%p\n", - newxprt, newxprt->sc_cm_id); - dev = newxprt->sc_cm_id->device; newxprt->sc_port_num = newxprt->sc_cm_id->port_num; @@ -448,21 +445,17 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) newxprt->sc_pd = ib_alloc_pd(dev, 0); if (IS_ERR(newxprt->sc_pd)) { - dprintk("svcrdma: error creating PD for connect request\n"); + trace_svcrdma_pd_err(newxprt, PTR_ERR(newxprt->sc_pd)); goto errout; } newxprt->sc_sq_cq = ib_alloc_cq_any(dev, newxprt, newxprt->sc_sq_depth, IB_POLL_WORKQUEUE); - if (IS_ERR(newxprt->sc_sq_cq)) { - dprintk("svcrdma: error creating SQ CQ for connect request\n"); + if (IS_ERR(newxprt->sc_sq_cq)) goto errout; - } newxprt->sc_rq_cq = ib_alloc_cq_any(dev, newxprt, rq_depth, IB_POLL_WORKQUEUE); - if (IS_ERR(newxprt->sc_rq_cq)) { - dprintk("svcrdma: error creating RQ CQ for connect request\n"); + if (IS_ERR(newxprt->sc_rq_cq)) goto errout; - } memset(&qp_attr, 0, sizeof qp_attr); qp_attr.event_handler = qp_event_handler; @@ -486,7 +479,7 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) ret = rdma_create_qp(newxprt->sc_cm_id, newxprt->sc_pd, &qp_attr); if (ret) { - dprintk("svcrdma: failed to create QP, ret=%d\n", ret); + trace_svcrdma_qp_err(newxprt, ret); goto errout; } newxprt->sc_qp = newxprt->sc_cm_id->qp; @@ -494,8 +487,10 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) if (!(dev->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS)) newxprt->sc_snd_w_inv = false; if (!rdma_protocol_iwarp(dev, newxprt->sc_port_num) && - !rdma_ib_or_roce(dev, newxprt->sc_port_num)) + !rdma_ib_or_roce(dev, newxprt->sc_port_num)) { + trace_svcrdma_fabric_err(newxprt, -EINVAL); goto errout; + } if (!svc_rdma_post_recvs(newxprt)) goto errout; @@ -517,15 +512,17 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) conn_param.initiator_depth = min_t(int, newxprt->sc_ord, dev->attrs.max_qp_init_rd_atom); if (!conn_param.initiator_depth) { - dprintk("svcrdma: invalid ORD setting\n"); ret = -EINVAL; + trace_svcrdma_initdepth_err(newxprt, ret); goto errout; } conn_param.private_data = &pmsg; conn_param.private_data_len = sizeof(pmsg); ret = rdma_accept(newxprt->sc_cm_id, &conn_param); - if (ret) + if (ret) { + trace_svcrdma_accept_err(newxprt, ret); goto errout; + } #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) dprintk("svcrdma: new connection %p accepted:\n", newxprt); @@ -544,8 +541,6 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) return &newxprt->sc_xprt; errout: - dprintk("svcrdma: failure accepting new connection rc=%d.\n", ret); - trace_svcrdma_xprt_fail(&newxprt->sc_xprt); /* Take a reference in case the DTO handler runs */ svc_xprt_get(&newxprt->sc_xprt); if (newxprt->sc_qp && !IS_ERR(newxprt->sc_qp))