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 extern struct list_head klp_patches; 9 10 #define klp_for_each_patch_safe(patch, tmp_patch) \ 11 list_for_each_entry_safe(patch, tmp_patch, &klp_patches, list) 12 13 #define klp_for_each_patch(patch) \ 14 list_for_each_entry(patch, &klp_patches, list) 15 16 void klp_free_patch_async(struct klp_patch *patch); 17 void klp_free_replaced_patches_async(struct klp_patch *new_patch); 18 void klp_unpatch_replaced_patches(struct klp_patch *new_patch); 19 void klp_discard_nops(struct klp_patch *new_patch); 20 21 static inline bool klp_is_object_loaded(struct klp_object *obj) 22 { 23 return !obj->name || obj->mod; 24 } 25 26 static inline int klp_pre_patch_callback(struct klp_object *obj) 27 { 28 int ret = 0; 29 30 if (obj->callbacks.pre_patch) 31 ret = (*obj->callbacks.pre_patch)(obj); 32 33 obj->callbacks.post_unpatch_enabled = !ret; 34 35 return ret; 36 } 37 38 static inline void klp_post_patch_callback(struct klp_object *obj) 39 { 40 if (obj->callbacks.post_patch) 41 (*obj->callbacks.post_patch)(obj); 42 } 43 44 static inline void klp_pre_unpatch_callback(struct klp_object *obj) 45 { 46 if (obj->callbacks.pre_unpatch) 47 (*obj->callbacks.pre_unpatch)(obj); 48 } 49 50 static inline void klp_post_unpatch_callback(struct klp_object *obj) 51 { 52 if (obj->callbacks.post_unpatch_enabled && 53 obj->callbacks.post_unpatch) 54 (*obj->callbacks.post_unpatch)(obj); 55 56 obj->callbacks.post_unpatch_enabled = false; 57 } 58 59 #endif /* _LIVEPATCH_CORE_H */ 60