From patchwork Thu May 21 14:35:13 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: 11563127 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 398811392 for ; Thu, 21 May 2020 14:35:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1AD9F206F6 for ; Thu, 21 May 2020 14:35:17 +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="cJ3ni8ko" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729728AbgEUOfQ (ORCPT ); Thu, 21 May 2020 10:35:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55730 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727889AbgEUOfP (ORCPT ); Thu, 21 May 2020 10:35:15 -0400 Received: from mail-io1-xd41.google.com (mail-io1-xd41.google.com [IPv6:2607:f8b0:4864:20::d41]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 66223C061A0E; Thu, 21 May 2020 07:35:15 -0700 (PDT) Received: by mail-io1-xd41.google.com with SMTP id x5so7660414ioh.6; Thu, 21 May 2020 07:35:15 -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=stmkbiHWzCCZRNsPWiFjJVSrWBUV/AE/XfhmyB/uKqQ=; b=cJ3ni8koQbqUhAaEupZBRSij8wpDZTzlxBmbPvJhYt9lCVTgNT//d38AYKUqzfrETC V1cHSbEh+3yEo9h/52m15La22kacuSud3lpNKrYxkue0+RkTtzcdH9Oxr9q3LtO/NoOD N3Ysa0hyP5amYXcMmGZtZ9uTDbmJGVnPs9bNk5RTyIzcESE0WJ2ut5Rz+UYggYviLt35 waSd6Wrpwv5hQcj6WNNNbRR2JQtjW64X0tCR/pUVgRn47kabeavioBD8Na2a3lJZBYr5 nqHnulSs/JLCbebfxnF3+a4B90ScSOQ0590MpPJ+Jo+10Pjf1iCdsMYuLqrAbpEFHdiu SKjg== 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=stmkbiHWzCCZRNsPWiFjJVSrWBUV/AE/XfhmyB/uKqQ=; b=oOZTqhFcjm0OmGs5sAJbyEmjGezscSduQmNs3qjW/bU28xk7jnEu5GzGdE4zjeCB8n ITXb62CgbYYL5d79peVqqcEpz4rAHkRDi9+r42BCYrciKm+kMQYGkz+/P3odN4B7KS+j qgLnzcN576UdvfVPTeJ6a5zXWhZKQhfmQ+0F4mfn8U4QigOuyKbTFz1O20ocGExnOY5v 9a1ks+j1dfOl5jdNHsW+uf75u6Q8WrCWQwXRv9sFahkjyGE2AIVDwIbVJi1raZ1SjzDK 9IJy4xptqa6sbM0FDKXrK7iYO7yVOI8fVV8YG7K/vHL9MGyFnpRQ/qCZhUX3NfP2A1T4 g6tA== X-Gm-Message-State: AOAM531DCHKKV9lL9JA963dRzW7rinyycnhaIYccGqoLx6Y6Q8K5kmBv GkfzoYNGvzCQXsffOoFWFhWNqUbp X-Google-Smtp-Source: ABdhPJxE6LEbZmp2CJkEo69I0UWKh9FldPdEw4yPUpz8Rh8/ylR29q+6IiwcoJc3e8VnaNZrUx04oQ== X-Received: by 2002:a05:6638:bc4:: with SMTP id g4mr3969192jad.55.1590071714471; Thu, 21 May 2020 07:35:14 -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 o18sm2935334ils.30.2020.05.21.07.35.13 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 21 May 2020 07:35:13 -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 04LEZDcZ000878; Thu, 21 May 2020 14:35:13 GMT Subject: [PATCH v3 17/32] SUNRPC: Replace dprintk call sites in TCP state change callouts From: Chuck Lever To: bfields@fieldses.org Cc: linux-nfs@vger.kernel.org, linux-rdma@vger.kernel.org Date: Thu, 21 May 2020 10:35:13 -0400 Message-ID: <20200521143513.3557.11220.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 Report TCP socket state changes and accept failures via tracepoints, replacing dprintk() call sites. No tracepoint is added in svc_tcp_listen_data_ready. There's no information available there that isn't also reported by the svcsock_new_socket and the accept failure tracepoints. Signed-off-by: Chuck Lever --- include/trace/events/sunrpc.h | 67 +++++++++++++++++++++++++++++++++++++++++ net/sunrpc/svcsock.c | 35 ++++----------------- 2 files changed, 73 insertions(+), 29 deletions(-) diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h index bf086640b14a..ed8c991d4f04 100644 --- a/include/trace/events/sunrpc.h +++ b/include/trace/events/sunrpc.h @@ -1481,6 +1481,73 @@ DEFINE_SVCSOCK_EVENT(tcp_send); DEFINE_SVCSOCK_EVENT(data_ready); DEFINE_SVCSOCK_EVENT(write_space); +TRACE_EVENT(svcsock_tcp_state, + TP_PROTO( + const struct svc_xprt *xprt, + const struct socket *socket + ), + + TP_ARGS(xprt, socket), + + TP_STRUCT__entry( + __field(unsigned long, socket_state) + __field(unsigned long, sock_state) + __field(unsigned long, flags) + __string(addr, xprt->xpt_remotebuf) + ), + + TP_fast_assign( + __entry->socket_state = socket->state; + __entry->sock_state = socket->sk->sk_state; + __entry->flags = xprt->xpt_flags; + __assign_str(addr, xprt->xpt_remotebuf); + ), + + TP_printk("addr=%s state=%s sk_state=%s flags=%s", __get_str(addr), + rpc_show_socket_state(__entry->socket_state), + rpc_show_sock_state(__entry->sock_state), + show_svc_xprt_flags(__entry->flags) + ) +); + +DECLARE_EVENT_CLASS(svcsock_accept_class, + TP_PROTO( + const struct svc_xprt *xprt, + const char *service, + long status + ), + + TP_ARGS(xprt, service, status), + + TP_STRUCT__entry( + __field(long, status) + __string(service, service) + __array(unsigned char, addr, sizeof(struct sockaddr_in6)) + ), + + TP_fast_assign( + __entry->status = status; + __assign_str(service, service); + memcpy(__entry->addr, &xprt->xpt_local, sizeof(__entry->addr)); + ), + + TP_printk("listener=%pISpc service=%s status=%ld", + __entry->addr, __get_str(service), __entry->status + ) +); + +#define DEFINE_ACCEPT_EVENT(name) \ + DEFINE_EVENT(svcsock_accept_class, svcsock_##name##_err, \ + TP_PROTO( \ + const struct svc_xprt *xprt, \ + const char *service, \ + long status \ + ), \ + TP_ARGS(xprt, service, status)) + +DEFINE_ACCEPT_EVENT(accept); +DEFINE_ACCEPT_EVENT(getpeername); + DECLARE_EVENT_CLASS(cache_event, TP_PROTO( const struct cache_detail *cd, diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 758b835ad4ce..4ac1180c6306 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -657,9 +657,6 @@ static void svc_tcp_listen_data_ready(struct sock *sk) { struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data; - dprintk("svc: socket %p TCP (listen) state change %d\n", - sk, sk->sk_state); - if (svsk) { /* Refer to svc_setup_socket() for details. */ rmb(); @@ -680,8 +677,7 @@ static void svc_tcp_listen_data_ready(struct sock *sk) if (svsk) { set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags); svc_xprt_enqueue(&svsk->sk_xprt); - } else - printk("svc: socket %p: no user data\n", sk); + } } } @@ -692,15 +688,11 @@ static void svc_tcp_state_change(struct sock *sk) { struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data; - dprintk("svc: socket %p TCP (connected) state change %d (svsk %p)\n", - sk, sk->sk_state, sk->sk_user_data); - - if (!svsk) - printk("svc: socket %p: no user data\n", sk); - else { + if (svsk) { /* Refer to svc_setup_socket() for details. */ rmb(); svsk->sk_ostate(sk); + trace_svcsock_tcp_state(&svsk->sk_xprt, svsk->sk_sock); if (sk->sk_state != TCP_ESTABLISHED) { set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags); svc_xprt_enqueue(&svsk->sk_xprt); @@ -721,7 +713,6 @@ static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt) struct socket *newsock; struct svc_sock *newsvsk; int err, slen; - RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); if (!sock) return NULL; @@ -735,30 +726,18 @@ static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt) else if (err != -EAGAIN) net_warn_ratelimited("%s: accept failed (err %d)!\n", serv->sv_name, -err); + trace_svcsock_accept_err(xprt, serv->sv_name, err); return NULL; } set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags); err = kernel_getpeername(newsock, sin); if (err < 0) { - net_warn_ratelimited("%s: peername failed (err %d)!\n", - serv->sv_name, -err); + trace_svcsock_getpeername_err(xprt, serv->sv_name, err); goto failed; /* aborted connection or whatever */ } slen = err; - /* Ideally, we would want to reject connections from unauthorized - * hosts here, but when we get encryption, the IP of the host won't - * tell us anything. For now just warn about unpriv connections. - */ - if (!svc_port_is_privileged(sin)) { - dprintk("%s: connect from unprivileged port: %s\n", - serv->sv_name, - __svc_print_addr(sin, buf, sizeof(buf))); - } - dprintk("%s: connect from %s\n", serv->sv_name, - __svc_print_addr(sin, buf, sizeof(buf))); - /* Reset the inherited callbacks before calling svc_setup_socket */ newsock->sk->sk_state_change = svsk->sk_ostate; newsock->sk->sk_data_ready = svsk->sk_odata; @@ -776,10 +755,8 @@ static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt) svc_xprt_set_remote(&newsvsk->sk_xprt, sin, slen); err = kernel_getsockname(newsock, sin); slen = err; - if (unlikely(err < 0)) { - dprintk("svc_tcp_accept: kernel_getsockname error %d\n", -err); + if (unlikely(err < 0)) slen = offsetof(struct sockaddr, sa_data); - } svc_xprt_set_local(&newsvsk->sk_xprt, sin, slen); if (sock_is_loopback(newsock->sk))