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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
c349cdca JP |
2 | #ifndef _LIVEPATCH_PATCH_H |
3 | #define _LIVEPATCH_PATCH_H | |
4 | ||
5 | #include <linux/livepatch.h> | |
6 | #include <linux/list.h> | |
7 | #include <linux/ftrace.h> | |
8 | ||
9 | /** | |
10 | * struct klp_ops - structure for tracking registered ftrace ops structs | |
11 | * | |
12 | * A single ftrace_ops is shared between all enabled replacement functions | |
19514910 | 13 | * (klp_func structs) which have the same old_func. This allows the switch |
c349cdca JP |
14 | * between function versions to happen instantaneously by updating the klp_ops |
15 | * struct's func_stack list. The winner is the klp_func at the top of the | |
16 | * func_stack (front of the list). | |
17 | * | |
18 | * @node: node for the global klp_ops list | |
19 | * @func_stack: list head for the stack of klp_func's (active func is on top) | |
20 | * @fops: registered ftrace ops struct | |
21 | */ | |
22 | struct klp_ops { | |
23 | struct list_head node; | |
24 | struct list_head func_stack; | |
25 | struct ftrace_ops fops; | |
26 | }; | |
27 | ||
19514910 | 28 | struct klp_ops *klp_find_ops(void *old_func); |
c349cdca JP |
29 | |
30 | int klp_patch_object(struct klp_object *obj); | |
31 | void klp_unpatch_object(struct klp_object *obj); | |
d83a7cb3 | 32 | void klp_unpatch_objects(struct klp_patch *patch); |
d697bad5 | 33 | void klp_unpatch_objects_dynamic(struct klp_patch *patch); |
c349cdca JP |
34 | |
35 | #endif /* _LIVEPATCH_PATCH_H */ |