1
0
mirror of https://github.com/torvalds/linux.git synced 2024-12-22 10:56:40 +00:00
linux/kernel/livepatch/core.h
Linus Torvalds 0ef76878cf Merge branch 'for-linus' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching
Pull livepatching updates from Jiri Kosina:

 - shadow variables support, allowing livepatches to associate new
   "shadow" fields to existing data structures, from Joe Lawrence

 - pre/post patch callbacks API, allowing livepatch writers to register
   callbacks to be called before and after patch application, from Joe
   Lawrence

* 'for-linus' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching:
  livepatch: __klp_disable_patch() should never be called for disabled patches
  livepatch: Correctly call klp_post_unpatch_callback() in error paths
  livepatch: add transition notices
  livepatch: move transition "complete" notice into klp_complete_transition()
  livepatch: add (un)patch callbacks
  livepatch: Small shadow variable documentation fixes
  livepatch: __klp_shadow_get_or_alloc() is local to shadow.c
  livepatch: introduce shadow variable API
2017-11-15 10:21:58 -08:00

48 lines
1.0 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LIVEPATCH_CORE_H
#define _LIVEPATCH_CORE_H
#include <linux/livepatch.h>
extern struct mutex klp_mutex;
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 */