Re: [PATCH net v2] selftests: rtnetlink.sh: remove esp4_offload after test

[Hangbin Liu <liuhangbin@gmail.com>]

On Fri, Jul 25, 2025 at 11:50:28AM +0800, Xiumei Mu wrote:
> The esp4_offload module, loaded during IPsec offload tests, should
> be reset to its default settings after testing.
> Otherwise, leaving it enabled could unintentionally affect subsequence
> test cases by keeping offload active.
> 
> Without this fix:
> $ lsmod | grep offload; ./rtnetlink.sh -t kci_test_ipsec_offload ; lsmod | grep offload;
> PASS: ipsec_offload
> esp4_offload           12288  0
> esp4                   32768  1 esp4_offload
> 
> With this fix:
> $ lsmod | grep offload; ./rtnetlink.sh -t kci_test_ipsec_offload ; lsmod | grep offload;
> PASS: ipsec_offload
> 
> Fixes: 2766a11161cc ("selftests: rtnetlink: add ipsec offload API test")
> Signed-off-by: Xiumei Mu <xmu@redhat.com>
> Reviewed-by: Shannon Nelson <sln@onemain.com>
> ---
> Changes in v2:
> - add test results in description
> - Enhanced logic for rmmod esp4_offload
> - fix shellcheck warning: SC2086 (The quoting issue)
> ---

nit: extra ---

Reviewed-by: Hangbin Liu <liuhangbin@gmail.com>

> ---
>  tools/testing/selftests/net/rtnetlink.sh | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/tools/testing/selftests/net/rtnetlink.sh b/tools/testing/selftests/net/rtnetlink.sh
> index 2e8243a65b50..d2298da320a6 100755
> --- a/tools/testing/selftests/net/rtnetlink.sh
> +++ b/tools/testing/selftests/net/rtnetlink.sh
> @@ -673,6 +673,11 @@ kci_test_ipsec_offload()
>  	sysfsf=$sysfsd/ipsec
>  	sysfsnet=/sys/bus/netdevsim/devices/netdevsim0/net/
>  	probed=false
> +	esp4_offload_probed_default=false
> +
> +	if lsmod | grep -q esp4_offload; then
> +		esp4_offload_probed_default=true
> +	fi
>  
>  	if ! mount | grep -q debugfs; then
>  		mount -t debugfs none /sys/kernel/debug/ &> /dev/null
> @@ -766,6 +771,7 @@ EOF
>  	fi
>  
>  	# clean up any leftovers
> +	! "$esp4_offload_probed_default" && lsmod | grep -q esp4_offload && rmmod esp4_offload
>  	echo 0 > /sys/bus/netdevsim/del_device
>  	$probed && rmmod netdevsim
>  
> -- 
> 2.50.1
>