selftests: livepatch: Check if stack_order sysfs attribute exists

The commit 3dae09de4061 ("livepatch: Add stack_order sysfs attribute"),
merged in v6.14, introduced a new sysfs attribute.

In order to run the selftests on older kernels, check if given kernel
has support for the attribute. If the attribute is not supported, skip
the checks.

Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Link: https://patch.msgid.link/20260504-lp-tests-old-fixes-v5-6-0be26d94ab9a@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>

diff --git a/tools/testing/selftests/livepatch/test-sysfs.sh b/tools/testing/selftests/livepatch/test-sysfs.sh
index fed6560212710bcfd36f28b4b491bafd4fbfe8a3..3b16285c6e67e141dfdd95645496c8fde97b9007 100755 (executable)
--- a/tools/testing/selftests/livepatch/test-sysfs.sh
+++ b/tools/testing/selftests/livepatch/test-sysfs.sh
@@ -10,6 +10,7 @@ MOD_LIVEPATCH3=test_klp_syscall
 
 HAS_PATCH_ATTR=0
 HAS_REPLACE_ATTR=0
+HAS_STACK_ORDER_ATTR=0
 
 setup_config
 
@@ -23,8 +24,6 @@ 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 "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"
-check_sysfs_value  "$MOD_LIVEPATCH" "stack_order" "1"
 check_sysfs_rights "$MOD_LIVEPATCH" "transition" "-r--r--r--"
 check_sysfs_value  "$MOD_LIVEPATCH" "transition" "0"
 
@@ -39,6 +38,12 @@ if does_sysfs_exist "$MOD_LIVEPATCH" "replace"; then
        HAS_REPLACE_ATTR=1
 fi
 
+if does_sysfs_exist "$MOD_LIVEPATCH" "stack_order"; then
+       check_sysfs_rights "$MOD_LIVEPATCH" "stack_order" "-r--r--r--"
+       check_sysfs_value  "$MOD_LIVEPATCH" "stack_order" "1"
+       HAS_STACK_ORDER_ATTR=1
+fi
+
 disable_lp $MOD_LIVEPATCH
 
 unload_lp $MOD_LIVEPATCH
@@ -149,33 +154,34 @@ livepatch: '$MOD_ATOMIC_REPLACE': unpatching complete
 % rmmod $MOD_ATOMIC_REPLACE"
 fi
 
-start_test "sysfs test stack_order value"
+if [[ "$HAS_STACK_ORDER_ATTR" == "1" ]]; then
+       start_test "sysfs test stack_order value"
 
-load_lp $MOD_LIVEPATCH
+       load_lp $MOD_LIVEPATCH
 
-check_sysfs_value  "$MOD_LIVEPATCH" "stack_order" "1"
+       check_sysfs_value  "$MOD_LIVEPATCH" "stack_order" "1"
 
-load_lp $MOD_LIVEPATCH2
+       load_lp $MOD_LIVEPATCH2
 
-check_sysfs_value  "$MOD_LIVEPATCH2" "stack_order" "2"
+       check_sysfs_value  "$MOD_LIVEPATCH2" "stack_order" "2"
 
-load_lp $MOD_LIVEPATCH3
+       load_lp $MOD_LIVEPATCH3
 
-check_sysfs_value  "$MOD_LIVEPATCH3" "stack_order" "3"
+       check_sysfs_value  "$MOD_LIVEPATCH3" "stack_order" "3"
 
-disable_lp $MOD_LIVEPATCH2
-unload_lp $MOD_LIVEPATCH2
+       disable_lp $MOD_LIVEPATCH2
+       unload_lp $MOD_LIVEPATCH2
 
-check_sysfs_value  "$MOD_LIVEPATCH" "stack_order" "1"
-check_sysfs_value  "$MOD_LIVEPATCH3" "stack_order" "2"
+       check_sysfs_value  "$MOD_LIVEPATCH" "stack_order" "1"
+       check_sysfs_value  "$MOD_LIVEPATCH3" "stack_order" "2"
 
-disable_lp $MOD_LIVEPATCH3
-unload_lp $MOD_LIVEPATCH3
+       disable_lp $MOD_LIVEPATCH3
+       unload_lp $MOD_LIVEPATCH3
 
-disable_lp $MOD_LIVEPATCH
-unload_lp $MOD_LIVEPATCH
+       disable_lp $MOD_LIVEPATCH
+       unload_lp $MOD_LIVEPATCH
 
-check_result "% insmod test_modules/$MOD_LIVEPATCH.ko
+       check_result "% insmod test_modules/$MOD_LIVEPATCH.ko
 livepatch: enabling patch '$MOD_LIVEPATCH'
 livepatch: '$MOD_LIVEPATCH': initializing patching transition
 livepatch: '$MOD_LIVEPATCH': starting patching transition
@@ -215,5 +221,6 @@ livepatch: '$MOD_LIVEPATCH': starting unpatching transition
 livepatch: '$MOD_LIVEPATCH': completing unpatching transition
 livepatch: '$MOD_LIVEPATCH': unpatching complete
 % rmmod $MOD_LIVEPATCH"
+fi
 
 exit 0