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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,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 62DBDC352A3 for ; Tue, 11 Feb 2020 13:50:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 41581208C3 for ; Tue, 11 Feb 2020 13:50:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729345AbgBKNuL (ORCPT ); Tue, 11 Feb 2020 08:50:11 -0500 Received: from mail.kernel.org ([198.145.29.99]:47486 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729119AbgBKNt7 (ORCPT ); Tue, 11 Feb 2020 08:49:59 -0500 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8ABC52465D; Tue, 11 Feb 2020 13:49:59 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.93) (envelope-from ) id 1j1VvK-001aqf-EY; Tue, 11 Feb 2020 08:49:58 -0500 Message-Id: <20200211134958.328823764@goodmis.org> User-Agent: quilt/0.65 Date: Tue, 11 Feb 2020 08:49:45 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , Tom Zanussi Subject: [for-linus][PATCH 4/5] tracing: Dont return -EINVAL when tracing soft disabled synth events References: <20200211134941.229027482@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tom Zanussi There's no reason to return -EINVAL when tracing a synthetic event if it's soft disabled - treat it the same as if it were hard disabled and return normally. Have synth_event_trace() and synth_event_trace_array() just return normally, and have synth_event_trace_start set the trace state to disabled and return. Link: http://lkml.kernel.org/r/df5d02a1625aff97c9866506c5bada6a069982ba.1581374549.git.zanussi@kernel.org Fixes: 8dcc53ad956d2 ("tracing: Add synth_event_trace() and related functions") Signed-off-by: Tom Zanussi Signed-off-by: Steven Rostedt (VMware) --- kernel/trace/trace_events_hist.c | 20 ++++++-------------- 1 file changed, 6 insertions(+), 14 deletions(-) diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index a546ffa14785..99a02168599b 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -1828,7 +1828,8 @@ int synth_event_trace(struct trace_event_file *file, unsigned int n_vals, ...) * called directly by the user, we don't have that but we * still need to honor not logging when disabled. */ - if (!(file->flags & EVENT_FILE_FL_ENABLED)) + if (!(file->flags & EVENT_FILE_FL_ENABLED) || + trace_trigger_soft_disabled(file)) return 0; event = file->event_call->data; @@ -1836,9 +1837,6 @@ int synth_event_trace(struct trace_event_file *file, unsigned int n_vals, ...) if (n_vals != event->n_fields) return -EINVAL; - if (trace_trigger_soft_disabled(file)) - return -EINVAL; - fields_size = event->n_u64 * sizeof(u64); /* @@ -1918,7 +1916,8 @@ int synth_event_trace_array(struct trace_event_file *file, u64 *vals, * called directly by the user, we don't have that but we * still need to honor not logging when disabled. */ - if (!(file->flags & EVENT_FILE_FL_ENABLED)) + if (!(file->flags & EVENT_FILE_FL_ENABLED) || + trace_trigger_soft_disabled(file)) return 0; event = file->event_call->data; @@ -1926,9 +1925,6 @@ int synth_event_trace_array(struct trace_event_file *file, u64 *vals, if (n_vals != event->n_fields) return -EINVAL; - if (trace_trigger_soft_disabled(file)) - return -EINVAL; - fields_size = event->n_u64 * sizeof(u64); /* @@ -2017,7 +2013,8 @@ int synth_event_trace_start(struct trace_event_file *file, * trace case, we save the enabed state upon start and just * ignore the following data calls. */ - if (!(file->flags & EVENT_FILE_FL_ENABLED)) { + if (!(file->flags & EVENT_FILE_FL_ENABLED) || + trace_trigger_soft_disabled(file)) { trace_state->enabled = false; goto out; } @@ -2026,11 +2023,6 @@ int synth_event_trace_start(struct trace_event_file *file, trace_state->event = file->event_call->data; - if (trace_trigger_soft_disabled(file)) { - ret = -EINVAL; - goto out; - } - fields_size = trace_state->event->n_u64 * sizeof(u64); /* -- 2.24.1