kernel/livepatch/core.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LIVEPATCH_CORE_H
   3 #define _LIVEPATCH_CORE_H
   4
   5 #include <linux/livepatch.h>
   6
   7 extern struct mutex klp_mutex;
   8
   9 static inline bool klp_is_object_loaded(struct klp_object *obj)
  10 {
  11         return !obj->name || obj->mod;
  12 }
  13
  14 static inline int klp_pre_patch_callback(struct klp_object *obj)
  15 {
  16         int ret = 0;
  17
  18         if (obj->callbacks.pre_patch)
  19                 ret = (*obj->callbacks.pre_patch)(obj);
  20
  21         obj->callbacks.post_unpatch_enabled = !ret;
  22
  23         return ret;
  24 }
  25
  26 static inline void klp_post_patch_callback(struct klp_object *obj)
  27 {
  28         if (obj->callbacks.post_patch)
  29                 (*obj->callbacks.post_patch)(obj);
  30 }
  31
  32 static inline void klp_pre_unpatch_callback(struct klp_object *obj)
  33 {
  34         if (obj->callbacks.pre_unpatch)
  35                 (*obj->callbacks.pre_unpatch)(obj);
  36 }
  37
  38 static inline void klp_post_unpatch_callback(struct klp_object *obj)
  39 {
  40         if (obj->callbacks.post_unpatch_enabled &&
  41             obj->callbacks.post_unpatch)
  42                 (*obj->callbacks.post_unpatch)(obj);
  43
  44         obj->callbacks.post_unpatch_enabled = false;
  45 }
  46
  47 #endif /* _LIVEPATCH_CORE_H */