From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dy1-f201.google.com (mail-dy1-f201.google.com [74.125.82.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3FF1A3D5221 for ; Tue, 28 Apr 2026 07:19:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777360777; cv=none; b=OuXsdYLskdfYl7hAZ5PyjAwESVLg8Z+kxThRgImTpcz+vzFUAKCfbQNzcRoTJILslWY6sg/AH1WDf9ZjcqTB90WKzbhn5D2D68ovHiUjjwFaX6peoH50XYJYWiiof+W6F89o0t2FPZ0r+L6U1iuT2vXL78n98tVVeoIElKPgpUQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777360777; c=relaxed/simple; bh=gfLLI2JWYrhGkycbda+k+ahRBIJmlPsVfm7fy7d7O8E=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=CrulhYJ6AN1PYF4vGHXWLP/97MCwoh32Q+lT4BeZRUF1+nFmDjIOqeWxiPG8I/jYfe2mQfIXCQPC/5oBGA+g7J2EtMTlX1FowhTVIUjz03p6DHfilKKHSaVgtMSLpoPpXD/cLLSIdM+RPmGIPyHLLbVco2di1WKcIW8fF67CDH0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=OEqE3Byu; arc=none smtp.client-ip=74.125.82.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="OEqE3Byu" Received: by mail-dy1-f201.google.com with SMTP id 5a478bee46e88-2cc75e79b97so31247137eec.1 for ; Tue, 28 Apr 2026 00:19:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1777360775; x=1777965575; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=22olXlLY2a/aW3iIRalXE3Od5F0yl9bqDC7eX7ett48=; b=OEqE3Byuevwl9eZKH/DGfYS1P1yt99YR8l9qBaQWGhVaIrJ+yWHJ4LL/xoWP5By2DD HRKKZB4VkDiy/vs5/iMcuUqHk4EG+s/W4bVjE9oGoHBTzCtJuAxjOgNRmh1AEmVK0lfG lBNR1wScTp5T7i3X3C7gHKkyAdNIs+NmUFYl2XC25SASZ8lHnBgYXNE0sUdXBTFx42Ok bYjbNRq6bxLad27/qTzAFeOoGYaBL21Np/2LcnhS5d9d9OOR3kpbek4EX7ocec1ouohu fg1Bk8T0GtgA46HtjWvu6uspJB1JuftPbwpVEPfmSmwH0VVgiQtf1ycLPhLTFR2WacZt 5ang== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777360775; x=1777965575; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=22olXlLY2a/aW3iIRalXE3Od5F0yl9bqDC7eX7ett48=; b=TL/Jkr5V9nWebXQe7rpAZO/0I9Dh3+ECKs/9E++F48+ptxmsN8/1CvQrTpRAedG9Pz pq+kOt2PbKLv1O3L1+NERcsuYgYGIfTslMwlDBXvQI81y+JAikXmYVej6kddakp5r+q3 SdVg/F8FHeeAk90lVGur7Qpn/90FxWMx7tr2MLtMkKGPURKh9w9+eu7YTEY1UyADkPgx R9v9nydrO8q/Ac9AzbzvALhKHY37lrUYcugx3a1OVh8LJF2tZ5n501GDggZnXXWFhtP6 hg9f3ahwkFxjQIDV3DIhWmF0Bo8i2KQeY5akgTdGjZX43kfdz9pfIkwkSU/GhXsYPBmj 62mQ== X-Forwarded-Encrypted: i=1; AFNElJ/baQghRBNMbhZvzZ4xv4IEbUZhA7u//vbehrBPjoWJP3AzisFI6cdWpQppg2T7DysQUsD5349HKa4QCYmMjAXF@vger.kernel.org X-Gm-Message-State: AOJu0YxYeLQAqnqq5H1prOmWE6za+9Qiqo4es0dXc/yRGzRGzIeA7L5C wAjqoxVXjpv2qZ7PxFnd6MGjj43gCLQxL6TGgNeZRt0JZLJq1N8MqF0RLcAwD4QFGhKODeAbIR2 v/LigPt4ESQ== X-Received: from dybor13.prod.google.com ([2002:a05:7301:1f0d:b0:2d8:4599:1d20]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7300:148b:b0:2e0:4edd:64e4 with SMTP id 5a478bee46e88-2ed0a10cb66mr958174eec.26.1777360775061; Tue, 28 Apr 2026 00:19:35 -0700 (PDT) Date: Tue, 28 Apr 2026 00:18:13 -0700 In-Reply-To: <20260428071903.1886173-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260425224951.174663-1-irogers@google.com> <20260428071903.1886173-1-irogers@google.com> X-Mailer: git-send-email 2.54.0.545.g6539524ca2-goog Message-ID: <20260428071903.1886173-9-irogers@google.com> Subject: [PATCH v8 08/58] perf data: Add open flag From: Ian Rogers To: acme@kernel.org, namhyung@kernel.org Cc: adrian.hunter@intel.com, alice.mei.rogers@gmail.com, dapeng1.mi@linux.intel.com, james.clark@linaro.org, leo.yan@linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, tmricht@linux.ibm.com, Ian Rogers Content-Type: text/plain; charset="UTF-8" Avoid double opens and ensure only open files are closed. This addresses some issues with python integration where the data file wants to be opened before being given to a session. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers --- Changes in v2: 1. Fixed File Rotation: In perf_data__switch() , I added data->open = false; after the file is closed. This ensures that the subsequent perf_data__open() call will not exit early and will successfully open the new file. 2. Fixed Memory Leak: In open_dir() , I added a call to zfree(&data->file.path) if mkdir() fails, preventing the leak of the path string. --- tools/perf/util/data.c | 26 ++++++++++++++++++++++---- tools/perf/util/data.h | 4 +++- 2 files changed, 25 insertions(+), 5 deletions(-) diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c index 94dc534a7386..17baf71897d1 100644 --- a/tools/perf/util/data.c +++ b/tools/perf/util/data.c @@ -346,8 +346,10 @@ static int open_dir(struct perf_data *data) return -1; if (perf_data__is_write(data) && - mkdir(data->path, S_IRWXU) < 0) + mkdir(data->path, S_IRWXU) < 0) { + zfree(&data->file.path); return -1; + } ret = open_file(data); @@ -360,9 +362,16 @@ static int open_dir(struct perf_data *data) int perf_data__open(struct perf_data *data) { - if (check_pipe(data)) + int ret; + + if (data->open) return 0; + if (check_pipe(data)) { + data->open = true; + return 0; + } + /* currently it allows stdio for pipe only */ data->file.use_stdio = false; @@ -375,16 +384,24 @@ int perf_data__open(struct perf_data *data) if (perf_data__is_read(data)) data->is_dir = is_dir(data); - return perf_data__is_dir(data) ? - open_dir(data) : open_file_dup(data); + ret = perf_data__is_dir(data) ? open_dir(data) : open_file_dup(data); + + if (!ret) + data->open = true; + + return ret; } void perf_data__close(struct perf_data *data) { + if (!data->open) + return; + if (perf_data__is_dir(data)) perf_data__close_dir(data); perf_data_file__close(&data->file); + data->open = false; } static ssize_t perf_data_file__read(struct perf_data_file *file, void *buf, size_t size) @@ -457,6 +474,7 @@ int perf_data__switch(struct perf_data *data, if (!at_exit) { perf_data_file__close(&data->file); + data->open = false; ret = perf_data__open(data); if (ret < 0) goto out; diff --git a/tools/perf/util/data.h b/tools/perf/util/data.h index 8299fb5fa7da..76f57f60361f 100644 --- a/tools/perf/util/data.h +++ b/tools/perf/util/data.h @@ -50,6 +50,8 @@ struct perf_data { const char *path; /** @file: Underlying file to be used. */ struct perf_data_file file; + /** @open: Has the file or directory been opened. */ + bool open; /** @is_pipe: Underlying file is a pipe. */ bool is_pipe; /** @is_dir: Underlying file is a directory. */ @@ -59,7 +61,7 @@ struct perf_data { /** @in_place_update: A file opened for reading but will be written to. */ bool in_place_update; /** @mode: Read or write mode. */ - enum perf_data_mode mode; + enum perf_data_mode mode:8; struct { /** @version: perf_dir_version. */ -- 2.54.0.545.g6539524ca2-goog