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
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