Re: [PATCH bpf-next] seltests: bpf: test_tunnel: use ip neigh

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On 9/21/21 8:59 AM, Jiri Benc wrote:
> The 'arp' command is deprecated and is another dependency of the selftest.
> Just use 'ip neigh', the test depends on iproute2 already.
> 
> Signed-off-by: Jiri Benc <jbenc@xxxxxxxxxx>
> ---
>  tools/testing/selftests/bpf/test_tunnel.sh | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/testing/selftests/bpf/test_tunnel.sh b/tools/testing/selftests/bpf/test_tunnel.sh
> index 1ccbe804e8e1..ca1372924023 100755
> --- a/tools/testing/selftests/bpf/test_tunnel.sh
> +++ b/tools/testing/selftests/bpf/test_tunnel.sh
> @@ -168,14 +168,15 @@ add_vxlan_tunnel()
>  	ip netns exec at_ns0 \
>  		ip link set dev $DEV_NS address 52:54:00:d9:01:00 up
>  	ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24
> -	ip netns exec at_ns0 arp -s 10.1.1.200 52:54:00:d9:02:00
> +	ip netns exec at_ns0 \
> +		ip neigh add 10.1.1.200 lladdr 52:54:00:d9:02:00 dev $DEV_NS

I realize you are just following suit with this change, but ip can
change namespaces internally:

ip -netns at_ns0 neigh add 10.1.1.200 lladdr 52:54:00:d9:02:00 dev $DEV_NS

All of the 'ip netns exec ... ip ...' commands can be simplified.


>  	ip netns exec at_ns0 iptables -A OUTPUT -j MARK --set-mark 0x800FF
>  
>  	# root namespace
>  	ip link add dev $DEV type $TYPE external gbp dstport 4789
>  	ip link set dev $DEV address 52:54:00:d9:02:00 up
>  	ip addr add dev $DEV 10.1.1.200/24
> -	arp -s 10.1.1.100 52:54:00:d9:01:00
> +	ip neigh add 10.1.1.100 lladdr 52:54:00:d9:01:00 dev $DEV
>  }
>  
>  add_ip6vxlan_tunnel()
> 




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