From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 099B4139D11 for ; Tue, 28 May 2024 10:38:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716892731; cv=none; b=TqAySqOoATz2eNhN3byDf3/T9dkQJEzEfNCcx4USf+GAep0HY6TZ6jViBq73PcZ/S10BgSW5lN8o97xjT0Brxartl2ZPScBoIsp13oOT8jcWLVbglbTtlcHrSzaWaxBL9sug8/ZhjKMJRQaRB5TuQ+cCJ7kuEcQZgiFzhX494tc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716892731; c=relaxed/simple; bh=PnaMIVB/MA3ALoBJAuH17nWR5TrePo5L1oMlZVf+Mrk=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=XOxh8hl7SrpiovcXYNmKMbHZCobS/G2oWXWOvKyG4TjsZT2rgGTB8zHrS0uLKo+kJHzlsl9v71IbZUfUbAUxWF0Xn1nTso6qi5BHotba1aVYYKDGxoGY6vSPUp+o6jRGH2vbnHTg4VI9eAszg6+4SE0l5wlcTh4cE9Hqts6VUIU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MBa+WW1Q; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="MBa+WW1Q" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D205BC3277B; Tue, 28 May 2024 10:38:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1716892730; bh=PnaMIVB/MA3ALoBJAuH17nWR5TrePo5L1oMlZVf+Mrk=; h=Date:Subject:To:References:From:In-Reply-To:From; b=MBa+WW1Q8/M/q5q8OWCjMUIgXmse0cEs6eCaDUHn7FoNIoP3UhLyDSJkXXWNGjWLy klF5P+NSqlYxoKCWzLuT13Ccg68D7pI13O9WZ9pc+R+hiC7ObjxsZcbUa9o+1wfG7p iOWjR+kD6xa333WpqxR4i7+QZkDHuzkyQCSBkWs/8QxUU35gi3BZF59DraRsWu1grc kXnplYlN/eZE9XE07R6X7PuGuDXC6FlmDV6OOnByaGhrooIxr7OveweCdRUQ2jSTrl flcfmDg9oH2qUOEMIY57B4MTu4Uqzn5GZdPbOc0wmV4+bTSwIB4viOrpwNVtkT6aCO epQD7ySEiDrZg== Message-ID: Date: Tue, 28 May 2024 12:38:46 +0200 Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Beta Subject: Re: [PATCH mptcp-next v6 5/9] selftests: net: lib: remove ns from list after clean-up Content-Language: en-GB To: Geliang Tang , mptcp@lists.linux.dev References: <20240527-selftests-net-lib-fixes-v6-0-72411ff2460e@kernel.org> <20240527-selftests-net-lib-fixes-v6-5-72411ff2460e@kernel.org> <312d5bb28672c8bd0eff47fcaf1ea7707bec8d60.camel@kernel.org> From: Matthieu Baerts Autocrypt: addr=matttbe@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit Hi Geliang, Thank you for your review! On 28/05/2024 05:47, Geliang Tang wrote: > On Mon, 2024-05-27 at 12:58 +0200, Matthieu Baerts (NGI0) wrote: >> Instead of only appending items to the list, remove them when the >> netns >> has been deleted. >> >> By doing that, we can make sure 'cleanup_all_ns()' is not trying to >> remove already deleted netns. >> >> Signed-off-by: Matthieu Baerts (NGI0) >> --- >>  tools/testing/selftests/net/lib.sh | 21 +++++++++++++++++---- >>  1 file changed, 17 insertions(+), 4 deletions(-) >> >> diff --git a/tools/testing/selftests/net/lib.sh >> b/tools/testing/selftests/net/lib.sh >> index b2572aff6286..c7a8cfb477cc 100644 >> --- a/tools/testing/selftests/net/lib.sh >> +++ b/tools/testing/selftests/net/lib.sh >> @@ -125,6 +125,20 @@ slowwait_for_counter() >>   slowwait "$timeout" until_counter_is ">= $((base + delta))" >> "$@" >>  } >>   >> +remove_ns_list() >> +{ >> + local item=$1 >> + local ns >> + local ns_list=("${NS_LIST[@]}") >> + NS_LIST=() >> + >> + for ns in "${ns_list[@]}"; do >> + if [ "${ns}" != "${item}" ]; then >> + NS_LIST+=("${ns}") >> + fi >> + done >> +} >> + >>  cleanup_ns() >>  { >>   local ns="" >> @@ -136,6 +150,8 @@ cleanup_ns() >>   if ! busywait $BUSYWAIT_TIMEOUT ip netns list \| >> grep -vq "^$ns$" &> /dev/null; then >>   echo "Warn: Failed to remove namespace $ns" >>   ret=1 >> + else > > nit: Should we also remove ns_list when "ip netns list" is busy? Or > should we not delete ns when "ip netns list" is busy? > > I think we should do these two commands together: > > ip netns delete "${ns}" &> /dev/null || true > remove_ns_list "${ns}" > > I'm not sure. WDYT? Good point, I'm not sure either. I kept it in the list because in case of errors, the caller could still get the list of NS that have been created, but not deleted yet. To be honest, I don't think any actions should be done on the NS after having called cleanup: it would probably better to kill all attached processes before that, and not retry later after errors and a kill. But I didn't want to change this logic as there might be other impacts. So at least here, we let the responsibility to the caller, and it can call cleanup_all_ns() again in case of errors. WDYT? Cheers, Matt -- Sponsored by the NGI0 Core fund.