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 Received: from picard.linux.it (picard.linux.it [213.254.12.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 10F59C4332F for ; Tue, 31 Oct 2023 13:07:43 +0000 (UTC) Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id 5A8FD3CEA01 for ; Tue, 31 Oct 2023 14:07:41 +0100 (CET) Received: from in-7.smtp.seeweb.it (in-7.smtp.seeweb.it [IPv6:2001:4b78:1:20::7]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by picard.linux.it (Postfix) with ESMTPS id 9F8F93CC903 for ; Tue, 31 Oct 2023 14:07:31 +0100 (CET) Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by in-7.smtp.seeweb.it (Postfix) with ESMTPS id 63C1F20009C for ; Tue, 31 Oct 2023 14:07:29 +0100 (CET) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 24661218F0 for ; Tue, 31 Oct 2023 13:07:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1698757649; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=+N8w6xRnc1dJrgBsempGMoPtflbHCLgP3d+vRglIsAE=; b=c6UsUBn4A/27zGldD+fHKLwTbFmuBm2PXUQKaKppVA0jPzK9qy0CoMa+6BLEmC2Q61lOwi K3slviXlIDTtr1tpRCUKAtZeD5JXnzpPtbwIiHLOJyaXYFZ3YPDtIVrlKrKLfXcT/hPY5c INQlg14VOFG+UWxyffegGnOU+e6xI6o= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1698757649; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=+N8w6xRnc1dJrgBsempGMoPtflbHCLgP3d+vRglIsAE=; b=vjNXm2zmffrlnolVxNIx2nddvXmdj+EnwF2KxBRVbgBrwPaWruV4rLocwEsdwMdK2S/FiG fdTmBOKuzarb05Dw== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 1023F1391B for ; Tue, 31 Oct 2023 13:07:29 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id pDYdAxH8QGULZAAAMHmgww (envelope-from ) for ; Tue, 31 Oct 2023 13:07:29 +0000 Date: Tue, 31 Oct 2023 14:08:00 +0100 From: Cyril Hrubis To: ltp@lists.linux.it Message-ID: References: <20231031125114.5879-1-chrubis@suse.cz> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20231031125114.5879-1-chrubis@suse.cz> X-Virus-Scanned: clamav-milter 1.0.1 at in-7.smtp.seeweb.it X-Virus-Status: Clean Subject: Re: [LTP] [PATCH v2] sched: add sched sysctl sanity test X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" Hi! > Currently the test fails due to kernel bug, I will send patch to LKML > later on. Should have removed this line, the patch has been pulled into mainline today. > The problem with kernel is that sysctl_sched_rt_period is unsigned int > but it's processed with proc_dointvec() which means that you are allowed > to write negative values into the variable even though documentation > says it shouldn't be possible and the kernel code asserts that rt_period > is > 0. > > Signed-off-by: Cyril Hrubis > --- > > - Fixed a few whitespaces > - Added second kernel commit into metadata > > runtest/sched | 2 + > testcases/kernel/sched/sysctl/.gitignore | 1 + > testcases/kernel/sched/sysctl/Makefile | 7 + > .../kernel/sched/sysctl/proc_sched_rt01.c | 122 ++++++++++++++++++ > 4 files changed, 132 insertions(+) > create mode 100644 testcases/kernel/sched/sysctl/.gitignore > create mode 100644 testcases/kernel/sched/sysctl/Makefile > create mode 100644 testcases/kernel/sched/sysctl/proc_sched_rt01.c > > diff --git a/runtest/sched b/runtest/sched > index 172fe4174..3457114f4 100644 > --- a/runtest/sched > +++ b/runtest/sched > @@ -16,3 +16,5 @@ sched_cli_serv run_sched_cliserv.sh > sched_stress sched_stress.sh > > autogroup01 autogroup01 > + > +proc_sched_rt01 > diff --git a/testcases/kernel/sched/sysctl/.gitignore b/testcases/kernel/sched/sysctl/.gitignore > new file mode 100644 > index 000000000..29b859b81 > --- /dev/null > +++ b/testcases/kernel/sched/sysctl/.gitignore > @@ -0,0 +1 @@ > +proc_sched_rt01 > diff --git a/testcases/kernel/sched/sysctl/Makefile b/testcases/kernel/sched/sysctl/Makefile > new file mode 100644 > index 000000000..18896b6f2 > --- /dev/null > +++ b/testcases/kernel/sched/sysctl/Makefile > @@ -0,0 +1,7 @@ > +# SPDX-License-Identifier: GPL-2.0-or-later > + > +top_srcdir ?= ../../../.. > + > +include $(top_srcdir)/include/mk/testcases.mk > + > +include $(top_srcdir)/include/mk/generic_leaf_target.mk > diff --git a/testcases/kernel/sched/sysctl/proc_sched_rt01.c b/testcases/kernel/sched/sysctl/proc_sched_rt01.c > new file mode 100644 > index 000000000..203846ae4 > --- /dev/null > +++ b/testcases/kernel/sched/sysctl/proc_sched_rt01.c > @@ -0,0 +1,122 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Copyright (C) Cyril Hrubis > + */ > + > +/*\ > + * [Description] > + * > + * Sanity tests for the /proc/sys/kernel/sched_r* files. > + * > + * - The sched_rt_period_us range is 1 to INT_MAX > + * try invalid values and check for EINVAL > + * > + * - The sched_rt_runtime_us range is -1 to INT_MAX > + * try invalid values and check for EINVAL > + * > + * - The sched_rt_runtime_us must be less or equal to sched_rt_period_us > + * > + * - Reset sched_rr_timeslice_ms to default value by writing -1 and check that > + * we get the default value on next read. > + * > + * This is a regression test for a commits: > + * > + * commit c1fc6484e1fb7cc2481d169bfef129a1b0676abe > + * Author: Cyril Hrubis > + * Date: Wed Aug 2 17:19:06 2023 +0200 > + * > + * sched/rt: sysctl_sched_rr_timeslice show default timeslice after reset > + * > + * commit 079be8fc630943d9fc70a97807feb73d169ee3fc > + * Author: Cyril Hrubis > + * Date: Mon Oct 2 13:55:51 2023 +0200 > + * > + * sched/rt: Disallow writing invalid values to sched_rt_period_us > + */ > + > +#include > +#include "tst_test.h" > + > +#define RT_PERIOD_US "/proc/sys/kernel/sched_rt_period_us" > +#define RT_RUNTIME_US "/proc/sys/kernel/sched_rt_runtime_us" > +#define RR_TIMESLICE_MS "/proc/sys/kernel/sched_rr_timeslice_ms" > + > +static int period_fd; > +static int runtime_fd; > + > +static void rr_timeslice_ms_reset(void) > +{ > + long timeslice_ms; > + > + SAFE_FILE_PRINTF(RR_TIMESLICE_MS, "-1"); > + SAFE_FILE_SCANF(RR_TIMESLICE_MS, "%li", ×lice_ms); > + > + TST_EXP_EXPR(timeslice_ms > 0, > + "timeslice_ms > 0 after reset to default"); > +} > + > +static void rt_period_us_einval(void) > +{ > + TST_EXP_FAIL(write(period_fd, "0", 2), EINVAL, > + "echo 0 > "RT_PERIOD_US); > + TST_EXP_FAIL(write(period_fd, "-1", 2), EINVAL, > + "echo -1 > "RT_PERIOD_US); > +} > + > +static void rt_runtime_us_einval(void) > +{ > + TST_EXP_FAIL(write(runtime_fd, "-2", 2), EINVAL, > + "echo -2 > "RT_RUNTIME_US); > +} > + > +static void rt_runtime_us_le_period_us(void) > +{ > + int period_us; > + char buf[32]; > + > + SAFE_FILE_SCANF(RT_PERIOD_US, "%i", &period_us); > + > + sprintf(buf, "%i", period_us+1); > + > + TST_EXP_FAIL(write(runtime_fd, buf, strlen(buf)), EINVAL, > + "echo rt_period_us+1 > "RT_RUNTIME_US); > +} > + > +static void verify_sched_proc(void) > +{ > + rr_timeslice_ms_reset(); > + rt_period_us_einval(); > + rt_runtime_us_einval(); > + rt_runtime_us_le_period_us(); > +} > + > +static void setup(void) > +{ > + period_fd = open(RT_PERIOD_US, O_RDWR); > + runtime_fd = open(RT_RUNTIME_US, O_RDWR); > +} > + > +static void cleanup(void) > +{ > + if (period_fd > 0) > + SAFE_CLOSE(period_fd); > + > + if (runtime_fd > 0) > + SAFE_CLOSE(runtime_fd); > +} > + > +static struct tst_test test = { > + .needs_root = 1, > + .setup = setup, > + .cleanup = cleanup, > + .test_all = verify_sched_proc, > + .tags = (struct tst_tag []) { > + {"linux-git", "c1fc6484e1fb"}, > + {"linux-git", "079be8fc6309"}, > + {} > + }, > + .needs_kconfigs = (const char *[]) { > + "CONFIG_SYSCTL", > + NULL > + }, > +}; > -- > 2.41.0 > > > -- > Mailing list info: https://lists.linux.it/listinfo/ltp -- Cyril Hrubis chrubis@suse.cz -- Mailing list info: https://lists.linux.it/listinfo/ltp