[linux-2.6-block.git] / include / linux / kasan.h

#ifndef _LINUX_KASAN_H
#define _LINUX_KASAN_H

#include <linux/types.h>

struct kmem_cache;
struct page;
struct vm_struct;

#ifdef CONFIG_KASAN

#define KASAN_SHADOW_SCALE_SHIFT 3
#define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)

#include <asm/kasan.h>
#include <linux/sched.h>

static inline void *kasan_mem_to_shadow(const void *addr)
{
	return (void *)((unsigned long)addr >> KASAN_SHADOW_SCALE_SHIFT)
		+ KASAN_SHADOW_OFFSET;
}

/* Enable reporting bugs after kasan_disable_current() */
static inline void kasan_enable_current(void)
{
	current->kasan_depth++;
}

/* Disable reporting bugs for current task */
static inline void kasan_disable_current(void)
{
	current->kasan_depth--;
}

void kasan_unpoison_shadow(const void *address, size_t size);

void kasan_alloc_pages(struct page *page, unsigned int order);
void kasan_free_pages(struct page *page, unsigned int order);

void kasan_poison_slab(struct page *page);
void kasan_unpoison_object_data(struct kmem_cache *cache, void *object);
void kasan_poison_object_data(struct kmem_cache *cache, void *object);

void kasan_kmalloc_large(const void *ptr, size_t size);
void kasan_kfree_large(const void *ptr);
void kasan_kfree(void *ptr);
void kasan_kmalloc(struct kmem_cache *s, const void *object, size_t size);
void kasan_krealloc(const void *object, size_t new_size);

void kasan_slab_alloc(struct kmem_cache *s, void *object);
void kasan_slab_free(struct kmem_cache *s, void *object);

int kasan_module_alloc(void *addr, size_t size);
void kasan_free_shadow(const struct vm_struct *vm);

#else /* CONFIG_KASAN */

static inline void kasan_unpoison_shadow(const void *address, size_t size) {}

static inline void kasan_enable_current(void) {}
static inline void kasan_disable_current(void) {}

static inline void kasan_alloc_pages(struct page *page, unsigned int order) {}
static inline void kasan_free_pages(struct page *page, unsigned int order) {}

static inline void kasan_poison_slab(struct page *page) {}
static inline void kasan_unpoison_object_data(struct kmem_cache *cache,
					void *object) {}
static inline void kasan_poison_object_data(struct kmem_cache *cache,
					void *object) {}

static inline void kasan_kmalloc_large(void *ptr, size_t size) {}
static inline void kasan_kfree_large(const void *ptr) {}
static inline void kasan_kfree(void *ptr) {}
static inline void kasan_kmalloc(struct kmem_cache *s, const void *object,
				size_t size) {}
static inline void kasan_krealloc(const void *object, size_t new_size) {}

static inline void kasan_slab_alloc(struct kmem_cache *s, void *object) {}
static inline void kasan_slab_free(struct kmem_cache *s, void *object) {}

static inline int kasan_module_alloc(void *addr, size_t size) { return 0; }
static inline void kasan_free_shadow(const struct vm_struct *vm) {}

#endif /* CONFIG_KASAN */

#endif /* LINUX_KASAN_H */
Commit	Line	Data
0b24becc AR	1	#ifndef _LINUX_KASAN_H
	2	#define _LINUX_KASAN_H
	3
	4	#include <linux/types.h>
	5
	6	struct kmem_cache;
	7	struct page;
a5af5aa8	8	struct vm_struct;
0b24becc AR	9
	10	#ifdef CONFIG_KASAN
	11
	12	#define KASAN_SHADOW_SCALE_SHIFT 3
	13	#define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
	14
	15	#include <asm/kasan.h>
	16	#include <linux/sched.h>
	17
	18	static inline void kasan_mem_to_shadow(const void addr)
	19	{
	20	return (void *)((unsigned long)addr >> KASAN_SHADOW_SCALE_SHIFT)
	21	+ KASAN_SHADOW_OFFSET;
	22	}
	23
	24	/* Enable reporting bugs after kasan_disable_current() */
	25	static inline void kasan_enable_current(void)
	26	{
	27	current->kasan_depth++;
	28	}
	29
	30	/* Disable reporting bugs for current task */
	31	static inline void kasan_disable_current(void)
	32	{
	33	current->kasan_depth--;
	34	}
	35
	36	void kasan_unpoison_shadow(const void *address, size_t size);
	37
b8c73fc2 AR	38	void kasan_alloc_pages(struct page *page, unsigned int order);
	39	void kasan_free_pages(struct page *page, unsigned int order);
	40
0316bec2 AR	41	void kasan_poison_slab(struct page *page);
	42	void kasan_unpoison_object_data(struct kmem_cache cache, void object);
	43	void kasan_poison_object_data(struct kmem_cache cache, void object);
	44
	45	void kasan_kmalloc_large(const void *ptr, size_t size);
	46	void kasan_kfree_large(const void *ptr);
92393615	47	void kasan_kfree(void *ptr);
0316bec2 AR	48	void kasan_kmalloc(struct kmem_cache s, const void object, size_t size);
	49	void kasan_krealloc(const void *object, size_t new_size);
	50
	51	void kasan_slab_alloc(struct kmem_cache s, void object);
	52	void kasan_slab_free(struct kmem_cache s, void object);
	53
bebf56a1	54	int kasan_module_alloc(void *addr, size_t size);
a5af5aa8	55	void kasan_free_shadow(const struct vm_struct *vm);
bebf56a1	56
0b24becc AR	57	#else /* CONFIG_KASAN */
	58
	59	static inline void kasan_unpoison_shadow(const void *address, size_t size) {}
	60
	61	static inline void kasan_enable_current(void) {}
	62	static inline void kasan_disable_current(void) {}
	63
b8c73fc2 AR	64	static inline void kasan_alloc_pages(struct page *page, unsigned int order) {}
	65	static inline void kasan_free_pages(struct page *page, unsigned int order) {}
	66
0316bec2 AR	67	static inline void kasan_poison_slab(struct page *page) {}
	68	static inline void kasan_unpoison_object_data(struct kmem_cache *cache,
	69	void *object) {}
	70	static inline void kasan_poison_object_data(struct kmem_cache *cache,
	71	void *object) {}
	72
	73	static inline void kasan_kmalloc_large(void *ptr, size_t size) {}
	74	static inline void kasan_kfree_large(const void *ptr) {}
92393615	75	static inline void kasan_kfree(void *ptr) {}
0316bec2 AR	76	static inline void kasan_kmalloc(struct kmem_cache s, const void object,
	77	size_t size) {}
	78	static inline void kasan_krealloc(const void *object, size_t new_size) {}
	79
	80	static inline void kasan_slab_alloc(struct kmem_cache s, void object) {}
	81	static inline void kasan_slab_free(struct kmem_cache s, void object) {}
	82
bebf56a1	83	static inline int kasan_module_alloc(void *addr, size_t size) { return 0; }
a5af5aa8	84	static inline void kasan_free_shadow(const struct vm_struct *vm) {}
bebf56a1	85
0b24becc AR	86	#endif /* CONFIG_KASAN */
	87
	88	#endif /* LINUX_KASAN_H */