From patchwork Mon Jan 16 15:46:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 13103490 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9EDF4C54EBE for ; Mon, 16 Jan 2023 16:35:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233365AbjAPQff (ORCPT ); Mon, 16 Jan 2023 11:35:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48434 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233373AbjAPQep (ORCPT ); Mon, 16 Jan 2023 11:34:45 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6EE722A145; Mon, 16 Jan 2023 08:22:37 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 0E3FF6104D; Mon, 16 Jan 2023 16:22:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EECE0C433EF; Mon, 16 Jan 2023 16:22:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673886156; bh=g0qKH8gvQygXxaA0XdDhpfr8FrmKiNbx7fVi2ddaDow=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Rn2yyfuKEgmixZCLctwTKEQyNN7k9vSqR5W8pTbFc6+SoBdswRd9HMVyYxODB6amg JeOXqMu7R7ZrlN05FNlnkpv/8VOyt9OoFldgkrxrQDW7SAxDs0vzCu86iBtE+oCIDO x8xduqfaaD0qPNXpS0vBmLPCq0WGGDHv/O4wsSVE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Leo Yan , Ian Rogers , Alexander Shishkin , bpf@vger.kernel.org, Ingo Molnar , Jiri Olsa , Mark Rutland , Namhyung Kim , Peter Zijlstra , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH 5.4 324/658] perf trace: Return error if a system call doesnt exist Date: Mon, 16 Jan 2023 16:46:52 +0100 Message-Id: <20230116154924.388367360@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154909.645460653@linuxfoundation.org> References: <20230116154909.645460653@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org From: Leo Yan [ Upstream commit d4223e1776c30b2ce8d0e6eaadcbf696e60fca3c ] When a system call is not detected, the reason is either because the system call ID is out of scope or failure to find the corresponding path in the sysfs, trace__read_syscall_info() returns zero. Finally, without returning an error value it introduces confusion for the caller. This patch lets the function trace__read_syscall_info() to return -EEXIST when a system call doesn't exist. Fixes: b8b1033fcaa091d8 ("perf trace: Mark syscall ids that are not allocated to avoid unnecessary error messages") Signed-off-by: Leo Yan Acked-by: Ian Rogers Cc: Alexander Shishkin Cc: bpf@vger.kernel.org Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20221121075237.127706-3-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/builtin-trace.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index a5201de1a191..d333f6c86c98 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -1511,11 +1511,11 @@ static int trace__read_syscall_info(struct trace *trace, int id) sc = trace->syscalls.table + id; if (sc->nonexistent) - return 0; + return -EEXIST; if (name == NULL) { sc->nonexistent = true; - return 0; + return -EEXIST; } sc->name = name;