netdev - Re: selftests:netfilter: nft_nat.sh: internal00-0 Error Could not open file \"-\" No such file or directory

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Date:   Thu, 28 Nov 2019 00:49:54 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Florian Westphal <fw@...len.de>
Cc:     "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Netdev <netdev@...r.kernel.org>, Shuah Khan <shuah@...nel.org>,
        pablo@...filter.org, jeffrin@...agiritech.edu.in,
        horms@...ge.net.au, yanhaishuang@...s.chinamobile.com,
        lkft-triage@...ts.linaro.org
Subject: Re: selftests:netfilter: nft_nat.sh: internal00-0 Error Could not
 open file \"-\" No such file or directory

On Tue, 26 Nov 2019 at 21:26, Florian Westphal <fw@...len.de> wrote:
>
> Naresh Kamboju <naresh.kamboju@...aro.org> wrote:
> > Do you see the following error while running selftests netfilter
> > nft_nat.sh test ?
> > Are we missing any kernel config fragments ? We are merging configs
> > from the directory.
> >
> > # selftests netfilter nft_nat.sh
> > netfilter: nft_nat.sh_ #
> > # Cannot create namespace file \"/var/run/netns/ns1\" File exists
>
> 'ns1' is not a good name.
> What is the output of nft --version?

nftables v0.7 (Scrooge McDuck)

>
> Does this patch help?  Even if it doesn't, its probably a good idea
> to add it.

I tested on arm64 Hikey and did not help.
However, I will validate on x86_64 and other devices and let you know.

>
> Subject: [PATCH] selftests: netfilter: use randomized netns names
>
> Using ns0, ns1, etc. isn't a good idea, they might already exist.
> Add a random suffix to avoid interering with other, unrelated net namespaces.
>
> Signed-off-by: Florian Westphal <fw@...len.de>
> ---
>  tools/testing/selftests/netfilter/nft_nat.sh | 332 ++++++++++---------
>  1 file changed, 176 insertions(+), 156 deletions(-)

+ ./nft_nat.sh
[   29.100929] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[   29.191505] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
internal:0:0-0: Error: Could not open file \"-\": No such file or directory
internal:0:0-0: Error: Could not open file \"-\": No such file or directory
internal:0:0-0: Error: Could not open file \"-\": No such file or directory
[   29.985551] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
<cmdline>:1:6-12: Error: syntax error, unexpected counter
list counter inet filter ns0in
     ^^^^^^^
ERROR: ns0in counter in ns1-Tj5FGVgK has unexpected value (expected
packets 1 bytes 84) at check_counters 1
<cmdline>:1:6-12: Error: syntax error, unexpected counter
list counter inet filter ns0in
     ^^^^^^^
<cmdline>:1:6-12: Error: syntax error, unexpected counter
list counter inet filter ns0out
     ^^^^^^^

ref:
https://lkft.validation.linaro.org/scheduler/job/1025331#L1508