1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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 |
13 | * (klp_func structs) which have the same old_func. This allows the switch |
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 | |
28 | struct klp_ops *klp_find_ops(void *old_func); |
29 | |
30 | int klp_patch_object(struct klp_object *obj); |
31 | void klp_unpatch_object(struct klp_object *obj); |
32 | void klp_unpatch_objects(struct klp_patch *patch); |
33 | void klp_unpatch_objects_dynamic(struct klp_patch *patch); |
34 | |
35 | #endif /* _LIVEPATCH_PATCH_H */ |
36 | |