From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_PASS, UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D0816C43381 for ; Fri, 22 Mar 2019 22:04:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9C69721925 for ; Fri, 22 Mar 2019 22:04:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727918AbfCVWEc (ORCPT ); Fri, 22 Mar 2019 18:04:32 -0400 Received: from terminus.zytor.com ([198.137.202.136]:47011 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727706AbfCVWEb (ORCPT ); Fri, 22 Mar 2019 18:04:31 -0400 Received: from terminus.zytor.com (localhost [127.0.0.1]) by terminus.zytor.com (8.15.2/8.15.2) with ESMTPS id x2MM3DpJ745692 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Fri, 22 Mar 2019 15:03:13 -0700 Received: (from tipbot@localhost) by terminus.zytor.com (8.15.2/8.15.2/Submit) id x2MM3Dp6745688; Fri, 22 Mar 2019 15:03:13 -0700 Date: Fri, 22 Mar 2019 15:03:13 -0700 X-Authentication-Warning: terminus.zytor.com: tipbot set sender to tipbot@zytor.com using -f From: tip-bot for Jiri Olsa Message-ID: Cc: mingo@kernel.org, tglx@linutronix.de, ak@linux.intel.com, jolsa@kernel.org, eranian@google.com, alexander.shishkin@linux.intel.com, namhyung@kernel.org, adrian.hunter@intel.com, alexey.budankov@linux.intel.com, acme@redhat.com, peterz@infradead.org, linux-kernel@vger.kernel.org, hpa@zytor.com Reply-To: tglx@linutronix.de, acme@redhat.com, alexey.budankov@linux.intel.com, eranian@google.com, alexander.shishkin@linux.intel.com, adrian.hunter@intel.com, namhyung@kernel.org, mingo@kernel.org, hpa@zytor.com, jolsa@kernel.org, ak@linux.intel.com, linux-kernel@vger.kernel.org, peterz@infradead.org In-Reply-To: <20190308134745.5057-2-jolsa@kernel.org> References: <20190308134745.5057-2-jolsa@kernel.org> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/urgent] perf data: Support having perf.data stored as a directory Git-Commit-ID: ec65def1045e4c7817b7f741a86dadae82877a93 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: ec65def1045e4c7817b7f741a86dadae82877a93 Gitweb: https://git.kernel.org/tip/ec65def1045e4c7817b7f741a86dadae82877a93 Author: Jiri Olsa AuthorDate: Fri, 8 Mar 2019 14:47:35 +0100 Committer: Arnaldo Carvalho de Melo CommitDate: Mon, 11 Mar 2019 11:56:03 -0300 perf data: Support having perf.data stored as a directory The caller needs to set 'struct perf_data::is_dir flag and the path will be treated as a directory. The 'struct perf_data::file' is initialized and open as 'path/header' file. Add a check to the direcory interface functions to check the is_dir flag. Signed-off-by: Jiri Olsa Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Alexey Budankov Cc: Andi Kleen Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/20190308134745.5057-2-jolsa@kernel.org [ Be consistent on how to signal failure, i.e. use -1 and let users check errno ] Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/data.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++- tools/perf/util/data.h | 6 ++++++ tools/perf/util/session.c | 4 ++++ 3 files changed, 58 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c index e098e189f93e..18fa8d4614eb 100644 --- a/tools/perf/util/data.c +++ b/tools/perf/util/data.c @@ -34,6 +34,9 @@ int perf_data__create_dir(struct perf_data *data, int nr) struct perf_data_file *files = NULL; int i, ret = -1; + if (WARN_ON(!data->is_dir)) + return -EINVAL; + files = zalloc(nr * sizeof(*files)); if (!files) return -ENOMEM; @@ -69,6 +72,9 @@ int perf_data__open_dir(struct perf_data *data) DIR *dir; int nr = 0; + if (WARN_ON(!data->is_dir)) + return -EINVAL; + dir = opendir(data->path); if (!dir) return -EINVAL; @@ -173,6 +179,16 @@ static int check_backup(struct perf_data *data) return 0; } +static bool is_dir(struct perf_data *data) +{ + struct stat st; + + if (stat(data->path, &st)) + return false; + + return (st.st_mode & S_IFMT) == S_IFDIR; +} + static int open_file_read(struct perf_data *data) { struct stat st; @@ -254,6 +270,30 @@ static int open_file_dup(struct perf_data *data) return open_file(data); } +static int open_dir(struct perf_data *data) +{ + int ret; + + /* + * So far we open only the header, so we can read the data version and + * layout. + */ + if (asprintf(&data->file.path, "%s/header", data->path) < 0) + return -1; + + if (perf_data__is_write(data) && + mkdir(data->path, S_IRWXU) < 0) + return -1; + + ret = open_file(data); + + /* Cleanup whatever we managed to create so far. */ + if (ret && perf_data__is_write(data)) + rm_rf_perf_data(data->path); + + return ret; +} + int perf_data__open(struct perf_data *data) { if (check_pipe(data)) @@ -265,11 +305,18 @@ int perf_data__open(struct perf_data *data) if (check_backup(data)) return -1; - return open_file_dup(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); } void perf_data__close(struct perf_data *data) { + if (perf_data__is_dir(data)) + perf_data__close_dir(data); + zfree(&data->file.path); close(data->file.fd); } diff --git a/tools/perf/util/data.h b/tools/perf/util/data.h index 14b47be2bd69..06aefeda311f 100644 --- a/tools/perf/util/data.h +++ b/tools/perf/util/data.h @@ -19,6 +19,7 @@ struct perf_data { const char *path; struct perf_data_file file; bool is_pipe; + bool is_dir; bool force; enum perf_data_mode mode; @@ -43,6 +44,11 @@ static inline int perf_data__is_pipe(struct perf_data *data) return data->is_pipe; } +static inline bool perf_data__is_dir(struct perf_data *data) +{ + return data->is_dir; +} + static inline int perf_data__fd(struct perf_data *data) { return data->file.fd; diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index db643f3c2b95..de777bdc0ed3 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -152,6 +152,10 @@ struct perf_session *perf_session__new(struct perf_data *data, } perf_evlist__init_trace_event_sample_raw(session->evlist); + + /* Open the directory data. */ + if (data->is_dir && perf_data__open_dir(data)) + goto out_delete; } } else { session->machines.host.env = &perf_env;