netdev - Re: [PATCH] selftests: netfilter: avoid RULE_REPLACE error when zeroing rule counters

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Message-ID: <aXANq__7K0_fhq2D@strlen.de>
Date: Wed, 21 Jan 2026 00:20:11 +0100
From: Florian Westphal <fw@...len.de>
To: Aleksei Oladko <aleksey.oladko@...tuozzo.com>
Cc: Pablo Neira Ayuso <pablo@...filter.org>, Phil Sutter <phil@....cc>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>, Shuah Khan <shuah@...nel.org>,
	Konstantin Khorenko <khorenko@...tuozzo.com>,
	netfilter-devel@...r.kernel.org, coreteam@...filter.org,
	netdev@...r.kernel.org, linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] selftests: netfilter: avoid RULE_REPLACE error when
 zeroing rule counters

Aleksei Oladko <aleksey.oladko@...tuozzo.com> wrote:
> diff --git a/tools/testing/selftests/net/netfilter/rpath.sh b/tools/testing/selftests/net/netfilter/rpath.sh
> index 24ad41d526d9..90cc21233235 100755
> --- a/tools/testing/selftests/net/netfilter/rpath.sh
> +++ b/tools/testing/selftests/net/netfilter/rpath.sh
> @@ -125,8 +125,24 @@ netns_ping() { # (netns, args...)
>  }
>  
>  clear_counters() {
> -	[ -n "$iptables" ] && ip netns exec "$ns2" "$iptables" -t raw -Z
> -	[ -n "$ip6tables" ] && ip netns exec "$ns2" "$ip6tables" -t raw -Z
> +	if [ -n "$iptables" ]; then
> +		if ! ip netns exec "$ns2" "$iptables" -t raw -Z 2>/dev/null; then
> +			ip netns exec "$ns2" "$iptables" -L PREROUTING -t raw -n --line-numbers | \

I would prefer to SKIP in this case rather than working around
userspace bugs.