[PATCH v2 2/2] selftests/livepatch: add sysfs test

[Song Liu <song@kernel.org>]

Add a test for livepatch sysfs entries.

Signed-off-by: Song Liu <song@kernel.org>
---
 tools/testing/selftests/livepatch/Makefile    |  3 +-
 .../testing/selftests/livepatch/test-sysfs.sh | 40 +++++++++++++++++++
 2 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100755 tools/testing/selftests/livepatch/test-sysfs.sh

diff --git a/tools/testing/selftests/livepatch/Makefile b/tools/testing/selftests/livepatch/Makefile
index 1acc9e1fa3fb..02fadc9d55e0 100644
--- a/tools/testing/selftests/livepatch/Makefile
+++ b/tools/testing/selftests/livepatch/Makefile
@@ -6,7 +6,8 @@ TEST_PROGS := \
 	test-callbacks.sh \
 	test-shadow-vars.sh \
 	test-state.sh \
-	test-ftrace.sh
+	test-ftrace.sh \
+	test-sysfs.sh
 
 TEST_FILES := settings
 
diff --git a/tools/testing/selftests/livepatch/test-sysfs.sh b/tools/testing/selftests/livepatch/test-sysfs.sh
new file mode 100755
index 000000000000..eb4a69ba1c2c
--- /dev/null
+++ b/tools/testing/selftests/livepatch/test-sysfs.sh
@@ -0,0 +1,40 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2022 Song Liu <song@kernel.org>
+
+. $(dirname $0)/functions.sh
+
+MOD_LIVEPATCH=test_klp_livepatch
+
+setup_config
+
+# - load a livepatch and verifies the sysfs entries work as expected
+
+start_test "sysfs test"
+
+load_lp $MOD_LIVEPATCH
+
+grep . "/sys/kernel/livepatch/$MOD_LIVEPATCH"/* > /dev/kmsg
+grep . "/sys/kernel/livepatch/$MOD_LIVEPATCH"/*/* > /dev/kmsg
+
+disable_lp $MOD_LIVEPATCH
+
+unload_lp $MOD_LIVEPATCH
+
+check_result "% modprobe $MOD_LIVEPATCH
+livepatch: enabling patch '$MOD_LIVEPATCH'
+livepatch: '$MOD_LIVEPATCH': initializing patching transition
+livepatch: '$MOD_LIVEPATCH': starting patching transition
+livepatch: '$MOD_LIVEPATCH': completing patching transition
+livepatch: '$MOD_LIVEPATCH': patching complete
+/sys/kernel/livepatch/test_klp_livepatch/enabled:1
+/sys/kernel/livepatch/test_klp_livepatch/transition:0
+/sys/kernel/livepatch/test_klp_livepatch/vmlinux/patched:1
+% echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled
+livepatch: '$MOD_LIVEPATCH': initializing unpatching transition
+livepatch: '$MOD_LIVEPATCH': starting unpatching transition
+livepatch: '$MOD_LIVEPATCH': completing unpatching transition
+livepatch: '$MOD_LIVEPATCH': unpatching complete
+% rmmod $MOD_LIVEPATCH"
+
+exit 0
-- 
2.30.2