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livepatch: add sysfs entry "patched" for each klp_object

Add per klp_object sysfs entry "patched". It makes it easier to debug typos in the module name.

Song Liu committed 4 years ago

Commit bb26cfd1 parent 033a9442 files · +26 −0Browse files

Showing the changes to kernel/livepatch (1 of 2 files). Show all

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kernel/livepatch/core.c+18−0
@@ -325,6 +325,7 @@ int klp_apply_section_relocs(struct module *pmod, Elf_Shdr *sechdrs, · 324 unmodified lines
325 * /sys/kernel/livepatch/<patch>/transition325 * /sys/kernel/livepatch/<patch>/transition
326 * /sys/kernel/livepatch/<patch>/force326 * /sys/kernel/livepatch/<patch>/force
327 * /sys/kernel/livepatch/<patch>/<object>327 * /sys/kernel/livepatch/<patch>/<object>
328 * /sys/kernel/livepatch/<patch>/<object>/patched
328 * /sys/kernel/livepatch/<patch>/<object>/<function,sympos>329 * /sys/kernel/livepatch/<patch>/<object>/<function,sympos>
329 */330 */
330static int __klp_disable_patch(struct klp_patch *patch);331static int __klp_disable_patch(struct klp_patch *patch);
@@ -431,6 +432,22 @@ static struct attribute *klp_patch_attrs[] = { · 100 unmodified lines
431};432};
432ATTRIBUTE_GROUPS(klp_patch);433ATTRIBUTE_GROUPS(klp_patch);
433 434
435static ssize_t patched_show(struct kobject *kobj,
436 struct kobj_attribute *attr, char *buf)
437{
438 struct klp_object *obj;
439
440 obj = container_of(kobj, struct klp_object, kobj);
441 return sysfs_emit(buf, "%d\n", obj->patched);
442}
443
444static struct kobj_attribute patched_kobj_attr = __ATTR_RO(patched);
445static struct attribute *klp_object_attrs[] = {
446 &patched_kobj_attr.attr,
447 NULL,
448};
449ATTRIBUTE_GROUPS(klp_object);
450
434static void klp_free_object_dynamic(struct klp_object *obj)451static void klp_free_object_dynamic(struct klp_object *obj)
435{452{
436 kfree(obj->name);453 kfree(obj->name);
@@ -576,6 +593,7 @@ static void klp_kobj_release_object(struct kobject *kobj) · 139 unmodified lines
576static struct kobj_type klp_ktype_object = {593static struct kobj_type klp_ktype_object = {
577 .release = klp_kobj_release_object,594 .release = klp_kobj_release_object,
578 .sysfs_ops = &kobj_sysfs_ops,595 .sysfs_ops = &kobj_sysfs_ops,
596 .default_groups = klp_object_groups,
579};597};
580 598
581static void klp_kobj_release_func(struct kobject *kobj)599static void klp_kobj_release_func(struct kobject *kobj)