xref: /kernel/linux/linux-6.6/tools/testing/selftests/livepatch/test-sysfs.sh

#!/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

check_sysfs_rights "$MOD_LIVEPATCH" "" "drwxr-xr-x"
check_sysfs_rights "$MOD_LIVEPATCH" "enabled" "-rw-r--r--"
check_sysfs_value  "$MOD_LIVEPATCH" "enabled" "1"
check_sysfs_rights "$MOD_LIVEPATCH" "force" "--w-------"
check_sysfs_rights "$MOD_LIVEPATCH" "transition" "-r--r--r--"
check_sysfs_value  "$MOD_LIVEPATCH" "transition" "0"
check_sysfs_rights "$MOD_LIVEPATCH" "vmlinux/patched" "-r--r--r--"
check_sysfs_value  "$MOD_LIVEPATCH" "vmlinux/patched" "1"

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
% 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"

start_test "sysfs test object/patched"

MOD_LIVEPATCH=test_klp_callbacks_demo
MOD_TARGET=test_klp_callbacks_mod
load_lp $MOD_LIVEPATCH

# check the "patch" file changes as target module loads/unloads
check_sysfs_value  "$MOD_LIVEPATCH" "$MOD_TARGET/patched" "0"
load_mod $MOD_TARGET
check_sysfs_value  "$MOD_LIVEPATCH" "$MOD_TARGET/patched" "1"
unload_mod $MOD_TARGET
check_sysfs_value  "$MOD_LIVEPATCH" "$MOD_TARGET/patched" "0"

disable_lp $MOD_LIVEPATCH
unload_lp $MOD_LIVEPATCH

check_result "% modprobe test_klp_callbacks_demo
livepatch: enabling patch 'test_klp_callbacks_demo'
livepatch: 'test_klp_callbacks_demo': initializing patching transition
test_klp_callbacks_demo: pre_patch_callback: vmlinux
livepatch: 'test_klp_callbacks_demo': starting patching transition
livepatch: 'test_klp_callbacks_demo': completing patching transition
test_klp_callbacks_demo: post_patch_callback: vmlinux
livepatch: 'test_klp_callbacks_demo': patching complete
% modprobe test_klp_callbacks_mod
livepatch: applying patch 'test_klp_callbacks_demo' to loading module 'test_klp_callbacks_mod'
test_klp_callbacks_demo: pre_patch_callback: test_klp_callbacks_mod -> [MODULE_STATE_COMING] Full formed, running module_init
test_klp_callbacks_demo: post_patch_callback: test_klp_callbacks_mod -> [MODULE_STATE_COMING] Full formed, running module_init
test_klp_callbacks_mod: test_klp_callbacks_mod_init
% rmmod test_klp_callbacks_mod
test_klp_callbacks_mod: test_klp_callbacks_mod_exit
test_klp_callbacks_demo: pre_unpatch_callback: test_klp_callbacks_mod -> [MODULE_STATE_GOING] Going away
livepatch: reverting patch 'test_klp_callbacks_demo' on unloading module 'test_klp_callbacks_mod'
test_klp_callbacks_demo: post_unpatch_callback: test_klp_callbacks_mod -> [MODULE_STATE_GOING] Going away
% echo 0 > /sys/kernel/livepatch/test_klp_callbacks_demo/enabled
livepatch: 'test_klp_callbacks_demo': initializing unpatching transition
test_klp_callbacks_demo: pre_unpatch_callback: vmlinux
livepatch: 'test_klp_callbacks_demo': starting unpatching transition
livepatch: 'test_klp_callbacks_demo': completing unpatching transition
test_klp_callbacks_demo: post_unpatch_callback: vmlinux
livepatch: 'test_klp_callbacks_demo': unpatching complete
% rmmod test_klp_callbacks_demo"

exit 0