| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _LIVEPATCH_CORE_H |
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| 3 | #define _LIVEPATCH_CORE_H |
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| 4 | |
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| 5 | #include <linux/livepatch.h> |
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| 6 | |
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| 7 | extern struct mutex klp_mutex; |
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| 8 | extern struct list_head klp_patches; |
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| 9 | |
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| 10 | #define klp_for_each_patch_safe(patch, tmp_patch) \ |
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| 11 | list_for_each_entry_safe(patch, tmp_patch, &klp_patches, list) |
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| 12 | |
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| 13 | #define klp_for_each_patch(patch) \ |
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| 14 | list_for_each_entry(patch, &klp_patches, list) |
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| 15 | |
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| 16 | void klp_free_patch_async(struct klp_patch *patch); |
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| 17 | void klp_free_replaced_patches_async(struct klp_patch *new_patch); |
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| 18 | void klp_unpatch_replaced_patches(struct klp_patch *new_patch); |
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| 19 | void klp_discard_nops(struct klp_patch *new_patch); |
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| 20 | |
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| 21 | static inline bool klp_is_object_loaded(struct klp_object *obj) |
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| 22 | { |
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| 23 | return !obj->name || obj->mod; |
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| 24 | } |
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| 25 | |
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| 26 | static inline int klp_pre_patch_callback(struct klp_object *obj) |
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| 27 | { |
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| 28 | int ret = 0; |
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| 29 | |
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| 30 | if (obj->callbacks.pre_patch) |
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| 31 | ret = (*obj->callbacks.pre_patch)(obj); |
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| 32 | |
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| 33 | obj->callbacks.post_unpatch_enabled = !ret; |
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| 34 | |
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| 35 | return ret; |
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| 36 | } |
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| 37 | |
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| 38 | static inline void klp_post_patch_callback(struct klp_object *obj) |
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| 39 | { |
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| 40 | if (obj->callbacks.post_patch) |
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| 41 | (*obj->callbacks.post_patch)(obj); |
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| 42 | } |
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| 43 | |
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| 44 | static inline void klp_pre_unpatch_callback(struct klp_object *obj) |
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| 45 | { |
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| 46 | if (obj->callbacks.pre_unpatch) |
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| 47 | (*obj->callbacks.pre_unpatch)(obj); |
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| 48 | } |
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| 49 | |
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| 50 | static inline void klp_post_unpatch_callback(struct klp_object *obj) |
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| 51 | { |
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| 52 | if (obj->callbacks.post_unpatch_enabled && |
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| 53 | obj->callbacks.post_unpatch) |
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| 54 | (*obj->callbacks.post_unpatch)(obj); |
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| 55 | |
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| 56 | obj->callbacks.post_unpatch_enabled = false; |
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| 57 | } |
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| 58 | |
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| 59 | #endif /* _LIVEPATCH_CORE_H */ |
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| 60 | |
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