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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,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 2A60FC4321D for ; Sat, 18 Aug 2018 11:38:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DF5732188F for ; Sat, 18 Aug 2018 11:38:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DF5732188F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=zytor.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726658AbeHROpg (ORCPT ); Sat, 18 Aug 2018 10:45:36 -0400 Received: from terminus.zytor.com ([198.137.202.136]:45835 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726272AbeHROpg (ORCPT ); Sat, 18 Aug 2018 10:45:36 -0400 Received: from terminus.zytor.com (localhost [127.0.0.1]) by terminus.zytor.com (8.15.2/8.15.2) with ESMTPS id w7IBc5bQ1287319 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Sat, 18 Aug 2018 04:38:05 -0700 Received: (from tipbot@localhost) by terminus.zytor.com (8.15.2/8.15.2/Submit) id w7IBc5EG1287316; Sat, 18 Aug 2018 04:38:05 -0700 Date: Sat, 18 Aug 2018 04:38:05 -0700 X-Authentication-Warning: terminus.zytor.com: tipbot set sender to tipbot@zytor.com using -f From: tip-bot for Arnaldo Carvalho de Melo Message-ID: Cc: namhyung@kernel.org, dsahern@gmail.com, tglx@linutronix.de, mingo@kernel.org, acme@redhat.com, hpa@zytor.com, wangnan0@huawei.com, linux-kernel@vger.kernel.org, adrian.hunter@intel.com, jolsa@kernel.org Reply-To: namhyung@kernel.org, dsahern@gmail.com, tglx@linutronix.de, mingo@kernel.org, wangnan0@huawei.com, linux-kernel@vger.kernel.org, adrian.hunter@intel.com, jolsa@kernel.org, acme@redhat.com, hpa@zytor.com To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/urgent] perf bpf: Generalize bpf__setup_stdout() Git-Commit-ID: 92bbe8d834d293c4db7a70fd53884ec1c95d61dc 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: 92bbe8d834d293c4db7a70fd53884ec1c95d61dc Gitweb: https://git.kernel.org/tip/92bbe8d834d293c4db7a70fd53884ec1c95d61dc Author: Arnaldo Carvalho de Melo AuthorDate: Mon, 6 Aug 2018 09:53:35 -0300 Committer: Arnaldo Carvalho de Melo CommitDate: Wed, 8 Aug 2018 15:55:56 -0300 perf bpf: Generalize bpf__setup_stdout() We will use it to set up other bpf-output events, for instance to generate augmented syscall entry tracepoints with pointer contents. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: https://lkml.kernel.org/n/tip-4r7kw0nsyi4vyz6xm1tzx6a3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/bpf-loader.c | 26 +++++++++++++++++--------- tools/perf/util/bpf-loader.h | 7 +++++++ 2 files changed, 24 insertions(+), 9 deletions(-) diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c index e864a7e0ff12..95a27bb6f1a1 100644 --- a/tools/perf/util/bpf-loader.c +++ b/tools/perf/util/bpf-loader.c @@ -1535,10 +1535,7 @@ int bpf__apply_obj_config(void) (strcmp(name, \ bpf_map__name(pos)) == 0)) -#define bpf__for_each_stdout_map(pos, obj, objtmp) \ - bpf__for_each_map_named(pos, obj, objtmp, "__bpf_stdout__") - -int bpf__setup_stdout(struct perf_evlist *evlist) +int bpf__setup_output_event(struct perf_evlist *evlist, const char *name) { struct bpf_map_priv *tmpl_priv = NULL; struct bpf_object *obj, *tmp; @@ -1547,7 +1544,7 @@ int bpf__setup_stdout(struct perf_evlist *evlist) int err; bool need_init = false; - bpf__for_each_stdout_map(map, obj, tmp) { + bpf__for_each_map_named(map, obj, tmp, name) { struct bpf_map_priv *priv = bpf_map__priv(map); if (IS_ERR(priv)) @@ -1567,17 +1564,23 @@ int bpf__setup_stdout(struct perf_evlist *evlist) return 0; if (!tmpl_priv) { - err = parse_events(evlist, "bpf-output/no-inherit=1,name=__bpf_stdout__/", - NULL); + char *event_definition = NULL; + + if (asprintf(&event_definition, "bpf-output/no-inherit=1,name=%s/", name) < 0) + return -ENOMEM; + + err = parse_events(evlist, event_definition, NULL); + free(event_definition); + if (err) { - pr_debug("ERROR: failed to create bpf-output event\n"); + pr_debug("ERROR: failed to create the \"%s\" bpf-output event\n", name); return -err; } evsel = perf_evlist__last(evlist); } - bpf__for_each_stdout_map(map, obj, tmp) { + bpf__for_each_map_named(map, obj, tmp, name) { struct bpf_map_priv *priv = bpf_map__priv(map); if (IS_ERR(priv)) @@ -1609,6 +1612,11 @@ int bpf__setup_stdout(struct perf_evlist *evlist) return 0; } +int bpf__setup_stdout(struct perf_evlist *evlist) +{ + return bpf__setup_output_event(evlist, "__bpf_stdout__"); +} + #define ERRNO_OFFSET(e) ((e) - __BPF_LOADER_ERRNO__START) #define ERRCODE_OFFSET(c) ERRNO_OFFSET(BPF_LOADER_ERRNO__##c) #define NR_ERRNO (__BPF_LOADER_ERRNO__END - __BPF_LOADER_ERRNO__START) diff --git a/tools/perf/util/bpf-loader.h b/tools/perf/util/bpf-loader.h index 5d3aefd6fae7..6be0eec043c6 100644 --- a/tools/perf/util/bpf-loader.h +++ b/tools/perf/util/bpf-loader.h @@ -82,6 +82,7 @@ int bpf__apply_obj_config(void); int bpf__strerror_apply_obj_config(int err, char *buf, size_t size); int bpf__setup_stdout(struct perf_evlist *evlist); +int bpf__setup_output_event(struct perf_evlist *evlist, const char *name); int bpf__strerror_setup_stdout(struct perf_evlist *evlist, int err, char *buf, size_t size); @@ -138,6 +139,12 @@ bpf__setup_stdout(struct perf_evlist *evlist __maybe_unused) return 0; } +static inline int +bpf__setup_output_event(struct perf_evlist *evlist __maybe_unused, const char *name __maybe_unused) +{ + return 0; +} + static inline int __bpf_strerror(char *buf, size_t size) {