netdev - Re: [PATCH net 1/2] selftests: fib_tests: Disable RP filter in multipath list receive test

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Date: Tue, 10 Oct 2023 09:21:26 -0600
From: David Ahern <dsahern@...nel.org>
To: Ido Schimmel <idosch@...dia.com>, netdev@...r.kernel.org
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
 edumazet@...gle.com, dsahern@...il.com, sriram.yagnaraman@....tech,
 oliver.sang@...el.com, mlxsw@...dia.com
Subject: Re: [PATCH net 1/2] selftests: fib_tests: Disable RP filter in
 multipath list receive test

On 10/10/23 7:21 AM, Ido Schimmel wrote:
> The test relies on the fib:fib_table_lookup trace point being triggered
> once for each forwarded packet. If RP filter is not disabled, the trace
> point will be triggered twice for each packet (for source validation and
> forwarding), potentially masking actual bugs. Fix by explicitly
> disabling RP filter.
> 
> Before:
> 
>  # ./fib_tests.sh -t ipv4_mpath_list
> 
>  IPv4 multipath list receive tests
>      TEST: Multipath route hit ratio (1.99)                              [ OK ]
> 
> After:
> 
>  # ./fib_tests.sh -t ipv4_mpath_list
> 
>  IPv4 multipath list receive tests
>      TEST: Multipath route hit ratio (.99)                               [ OK ]
> 
> Fixes: 8ae9efb859c0 ("selftests: fib_tests: Add multipath list receive tests")
> Reported-by: kernel test robot <oliver.sang@...el.com>
> Closes: https://lore.kernel.org/netdev/202309191658.c00d8b8-oliver.sang@intel.com/
> Tested-by: kernel test robot <oliver.sang@...el.com>
> Signed-off-by: Ido Schimmel <idosch@...dia.com>
> ---
>  tools/testing/selftests/net/fib_tests.sh | 3 +++
>  1 file changed, 3 insertions(+)
> 

Reviewed-by: David Ahern <dsahern@...nel.org>