include/linux/blk-crypto.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright 2019 Google LLC
 */

#ifndef __LINUX_BLK_CRYPTO_H
#define __LINUX_BLK_CRYPTO_H

#include <linux/types.h>
#include <linux/bio.h>

#define SECTOR_SHIFT 9

#ifdef CONFIG_BLK_INLINE_ENCRYPTION

int blk_crypto_init(void);

int blk_crypto_submit_bio(struct bio **bio_ptr);

bool blk_crypto_endio(struct bio *bio);

int blk_crypto_start_using_mode(enum blk_crypto_mode_num mode_num,
				unsigned int data_unit_size,
				struct request_queue *q);

int blk_crypto_evict_key(struct request_queue *q, const u8 *key,
			 enum blk_crypto_mode_num mode,
			 unsigned int data_unit_size);

#else /* CONFIG_BLK_INLINE_ENCRYPTION */

static inline int blk_crypto_init(void)
{
	return 0;
}

static inline int blk_crypto_submit_bio(struct bio **bio_ptr)
{
	return 0;
}

static inline bool blk_crypto_endio(struct bio *bio)
{
	return true;
}

static inline int
blk_crypto_start_using_mode(enum blk_crypto_mode_num mode_num,
			    unsigned int data_unit_size,
			    struct request_queue *q)
{
	return -EOPNOTSUPP;
}

static inline int blk_crypto_evict_key(struct request_queue *q, const u8 *key,
				       enum blk_crypto_mode_num mode,
				       unsigned int data_unit_size)
{
	return 0;
}

#endif /* CONFIG_BLK_INLINE_ENCRYPTION */

#endif /* __LINUX_BLK_CRYPTO_H */