| 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 |