From patchwork Mon Jan 14 15:27:57 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Slavomir Kaslev X-Patchwork-Id: 10762951 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 221C8139A for ; Mon, 14 Jan 2019 15:28:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 130ED2940D for ; Mon, 14 Jan 2019 15:28:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0762F29417; Mon, 14 Jan 2019 15:28:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 94DA92940D for ; Mon, 14 Jan 2019 15:28:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726686AbfANP2N (ORCPT ); Mon, 14 Jan 2019 10:28:13 -0500 Received: from mail-wr1-f67.google.com ([209.85.221.67]:42569 "EHLO mail-wr1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726674AbfANP2N (ORCPT ); Mon, 14 Jan 2019 10:28:13 -0500 Received: by mail-wr1-f67.google.com with SMTP id q18so23313240wrx.9 for ; Mon, 14 Jan 2019 07:28:12 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=MqmgqGFcMgXdmOUBNzmTacL4KBPEurEwuoHJ/z5RlX8=; b=j/6dQkPdN+4wqMvHxR0PVV5/4I4Uuu1XxQhFTxZ0CvnSJOAdK3RXkPDvZ7NP/KnsBt SFVzR/zOyhTWxAS5Ry+65yd74qS+htOuBAS/XFS0fuWc3S3pyUoGQ8VjF2NMF1uaelJV OGmWL6tiBypSkPul+I9zXPcreCwKKE+3OxgOgpbYdcRKhDqG2p5edy7UBka3h8uCIQS8 iQk+kemvTvrJFJJjk8BrlhnNeCct9ALu0ZfVYFIDLZlZz4e/+vC3uIXxUXnlbimW9vE1 MXOa4YuYKGN0igFvIwEGevOgEovCXrMEZiNwjyWzCwQYL5l0BpJX6ECNunZgIY+17bki lvGg== X-Gm-Message-State: AJcUukfu4LnpuwRt5r6QhlnxhNbfEA9BxNkaThGGHU+REHO2+Q7/vzxd okHXbxId/aHeuL7zs1QGc/hASe0T5Oar X-Google-Smtp-Source: ALg8bN4esV644gu/o989+dcqYZkFBbfuHkMAcpfbeZSBGuXbCJWlQqiEZYrakAcpHaIHBg+fLdH7wQ== X-Received: by 2002:adf:ef88:: with SMTP id d8mr24702542wro.163.1547479691117; Mon, 14 Jan 2019 07:28:11 -0800 (PST) Received: from box.eng.vmware.com ([146.247.46.5]) by smtp.gmail.com with ESMTPSA id a132sm34784167wmh.5.2019.01.14.07.28.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 14 Jan 2019 07:28:10 -0800 (PST) From: Slavomir Kaslev To: linux-trace-devel@vger.kernel.org Cc: rostedt@goodmis.org, ykaradzhov@vmware.com, tstoyanov@vmware.com Subject: [PATCH v3 3/6] trace-cmd: Add tracecmd_create_recorder_virt function Date: Mon, 14 Jan 2019 17:27:57 +0200 Message-Id: <20190114152800.31060-4-kaslevs@vmware.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190114152800.31060-1-kaslevs@vmware.com> References: <20190114152800.31060-1-kaslevs@vmware.com> MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add tracecmd_create_recorder_virt function that will be used for tracing VM guests. Signed-off-by: Slavomir Kaslev --- include/trace-cmd/trace-cmd.h | 1 + lib/trace-cmd/trace-recorder.c | 53 ++++++++++++++++++++++++---------- 2 files changed, 39 insertions(+), 15 deletions(-) diff --git a/include/trace-cmd/trace-cmd.h b/include/trace-cmd/trace-cmd.h index 99a455c..f0747c5 100644 --- a/include/trace-cmd/trace-cmd.h +++ b/include/trace-cmd/trace-cmd.h @@ -277,6 +277,7 @@ enum { void tracecmd_free_recorder(struct tracecmd_recorder *recorder); struct tracecmd_recorder *tracecmd_create_recorder(const char *file, int cpu, unsigned flags); struct tracecmd_recorder *tracecmd_create_recorder_fd(int fd, int cpu, unsigned flags); +struct tracecmd_recorder *tracecmd_create_recorder_virt(const char *file, int cpu, int trace_fd); struct tracecmd_recorder *tracecmd_create_recorder_maxkb(const char *file, int cpu, unsigned flags, int maxkb); struct tracecmd_recorder *tracecmd_create_buffer_recorder_fd(int fd, int cpu, unsigned flags, const char *buffer); struct tracecmd_recorder *tracecmd_create_buffer_recorder(const char *file, int cpu, unsigned flags, const char *buffer); diff --git a/lib/trace-cmd/trace-recorder.c b/lib/trace-cmd/trace-recorder.c index 5331925..497f752 100644 --- a/lib/trace-cmd/trace-recorder.c +++ b/lib/trace-cmd/trace-recorder.c @@ -148,16 +148,22 @@ tracecmd_create_buffer_recorder_fd2(int fd, int fd2, int cpu, unsigned flags, recorder->fd1 = fd; recorder->fd2 = fd2; - if (flags & TRACECMD_RECORD_SNAPSHOT) - ret = asprintf(&path, "%s/per_cpu/cpu%d/snapshot_raw", buffer, cpu); - else - ret = asprintf(&path, "%s/per_cpu/cpu%d/trace_pipe_raw", buffer, cpu); - if (ret < 0) - goto out_free; + if (buffer) { + if (flags & TRACECMD_RECORD_SNAPSHOT) + ret = asprintf(&path, "%s/per_cpu/cpu%d/snapshot_raw", + buffer, cpu); + else + ret = asprintf(&path, "%s/per_cpu/cpu%d/trace_pipe_raw", + buffer, cpu); + if (ret < 0) + goto out_free; + + recorder->trace_fd = open(path, O_RDONLY); + free(path); - recorder->trace_fd = open(path, O_RDONLY); - if (recorder->trace_fd < 0) - goto out_free; + if (recorder->trace_fd < 0) + goto out_free; + } if ((recorder->flags & TRACECMD_RECORD_NOSPLICE) == 0) { ret = pipe(recorder->brass); @@ -177,13 +183,9 @@ tracecmd_create_buffer_recorder_fd2(int fd, int fd2, int cpu, unsigned flags, recorder->pipe_size = pipe_size; } - free(path); - return recorder; out_free: - free(path); - tracecmd_free_recorder(recorder); return NULL; } @@ -194,8 +196,9 @@ tracecmd_create_buffer_recorder_fd(int fd, int cpu, unsigned flags, const char * return tracecmd_create_buffer_recorder_fd2(fd, -1, cpu, flags, buffer, 0); } -struct tracecmd_recorder * -tracecmd_create_buffer_recorder(const char *file, int cpu, unsigned flags, const char *buffer) +static struct tracecmd_recorder * +__tracecmd_create_buffer_recorder(const char *file, int cpu, unsigned flags, + const char *buffer) { struct tracecmd_recorder *recorder; int fd; @@ -258,6 +261,26 @@ tracecmd_create_buffer_recorder_maxkb(const char *file, int cpu, unsigned flags, goto out; } +struct tracecmd_recorder * +tracecmd_create_buffer_recorder(const char *file, int cpu, unsigned flags, + const char *buffer) +{ + return __tracecmd_create_buffer_recorder(file, cpu, flags, buffer); +} + +struct tracecmd_recorder * +tracecmd_create_recorder_virt(const char *file, int cpu, int trace_fd) +{ + struct tracecmd_recorder *recorder; + + recorder = __tracecmd_create_buffer_recorder( + file, cpu, TRACECMD_RECORD_NOSPLICE, NULL); + if (recorder) + recorder->trace_fd = trace_fd; + + return recorder; +} + struct tracecmd_recorder *tracecmd_create_recorder_fd(int fd, int cpu, unsigned flags) { const char *tracing;