[Devel] [PATCH vz10 v2 5/5] selftests: net: io_uring_zerocopy.sh: restore io_uring sysctl on exit

[Aleksei Oladko]

From: Konstantin Khorenko <khorenko at virtuozzo.com>

Save the original value of kernel.io_uring_disabled before changing
it and restore it in cleanup handler to ensure the system state is
restored regardless of test outcome.

https://virtuozzo.atlassian.net/browse/VSTOR-120995

Signed-off-by: Konstantin Khorenko <khorenko at virtuozzo.com>
---
 tools/testing/selftests/net/io_uring_zerocopy_tx.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/testing/selftests/net/io_uring_zerocopy_tx.sh b/tools/testing/selftests/net/io_uring_zerocopy_tx.sh
index 1b0816760534..7135596ec622 100755
--- a/tools/testing/selftests/net/io_uring_zerocopy_tx.sh
+++ b/tools/testing/selftests/net/io_uring_zerocopy_tx.sh
@@ -77,9 +77,13 @@ esac
 
 # Start of state changes: install cleanup handler
 
+old_io_uring_disabled=""
 cleanup() {
 	ip netns del "${NS2}"
 	ip netns del "${NS1}"
+	if [ -n "$old_io_uring_disabled" ]; then
+		sysctl -w -q kernel.io_uring_disabled="$old_io_uring_disabled" 2>/dev/null || true
+	fi
 }
 
 trap cleanup EXIT
@@ -122,6 +126,7 @@ do_test() {
 	wait
 }
 
+old_io_uring_disabled=$(sysctl -n kernel.io_uring_disabled 2>/dev/null || echo "0")
 sysctl -w -q kernel.io_uring_disabled=0
 
 do_test "${EXTRA_ARGS}"
-- 
2.43.0