kernel/livepatch/core.h

Source file repositories/reference/linux-study-clean/kernel/livepatch/core.h

File Facts

System
Linux kernel
Corpus path
kernel/livepatch/core.h
Extension
.h
Size
1503 bytes
Lines
60
Domain
Core OS
Bucket
Scheduler, Processes, Timers, Sync, And Syscalls
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _LIVEPATCH_CORE_H
#define _LIVEPATCH_CORE_H

#include <linux/livepatch.h>

extern struct mutex klp_mutex;
extern struct list_head klp_patches;

#define klp_for_each_patch_safe(patch, tmp_patch)		\
	list_for_each_entry_safe(patch, tmp_patch, &klp_patches, list)

#define klp_for_each_patch(patch)	\
	list_for_each_entry(patch, &klp_patches, list)

void klp_free_patch_async(struct klp_patch *patch);
void klp_free_replaced_patches_async(struct klp_patch *new_patch);
void klp_unpatch_replaced_patches(struct klp_patch *new_patch);
void klp_discard_nops(struct klp_patch *new_patch);

static inline bool klp_is_object_loaded(struct klp_object *obj)
{
	return !obj->name || obj->mod;
}

static inline int klp_pre_patch_callback(struct klp_object *obj)
{
	int ret = 0;

	if (obj->callbacks.pre_patch)
		ret = (*obj->callbacks.pre_patch)(obj);

	obj->callbacks.post_unpatch_enabled = !ret;

	return ret;
}

static inline void klp_post_patch_callback(struct klp_object *obj)
{
	if (obj->callbacks.post_patch)
		(*obj->callbacks.post_patch)(obj);
}

static inline void klp_pre_unpatch_callback(struct klp_object *obj)
{
	if (obj->callbacks.pre_unpatch)
		(*obj->callbacks.pre_unpatch)(obj);
}

static inline void klp_post_unpatch_callback(struct klp_object *obj)
{
	if (obj->callbacks.post_unpatch_enabled &&
	    obj->callbacks.post_unpatch)
		(*obj->callbacks.post_unpatch)(obj);

	obj->callbacks.post_unpatch_enabled = false;
}

#endif /* _LIVEPATCH_CORE_H */

Annotation

Implementation Notes