selftests: rtnetlink.sh: remove esp4_offload after test

[ Upstream commit 5b32321fdaf3fd1a92ec726af18765e225b0ee2b ]

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>
Reviewed-by: Hangbin Liu <liuhangbin@gmail.com>
Link: https://patch.msgid.link/6d3a1d777c4de4eb0ca94ced9e77be8d48c5b12f.1753415428.git.xmu@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/tools/testing/selftests/net/rtnetlink.sh b/tools/testing/selftests/net/rtnetlink.sh
index 87dce3efe31e4a9179ef40a710bf69fddc1b50a0..8a92432177d3b23b940a9b5853f0e7b28bbea4d6 100755 (executable)
--- a/tools/testing/selftests/net/rtnetlink.sh
+++ b/tools/testing/selftests/net/rtnetlink.sh
@@ -738,6 +738,11 @@ 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
@@ -831,6 +836,7 @@ 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