blob: d7405eac16237053de7f9256ba783ddefcffa92e [file] [log] [blame]
/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef PFK_H_
#define PFK_H_
#include <linux/bio.h>
struct ice_crypto_setting;
#ifdef CONFIG_PFK
/*
* Default key for inline encryption.
*
* For now only AES-256-XTS is supported, so this is a fixed length. But if
* ever needed, this should be made variable-length with a 'mode' and 'size'.
* (Remember to update pfk_allow_merge_bio() when doing so!)
*/
#define BLK_ENCRYPTION_KEY_SIZE_AES_256_XTS 64
struct blk_encryption_key {
u8 raw[BLK_ENCRYPTION_KEY_SIZE_AES_256_XTS];
};
int pfk_load_key_start(const struct bio *bio,
struct ice_crypto_setting *ice_setting, bool *is_pfe, bool);
int pfk_load_key_end(const struct bio *bio, bool *is_pfe);
int pfk_remove_key(const unsigned char *key, size_t key_size);
bool pfk_allow_merge_bio(const struct bio *bio1, const struct bio *bio2);
void pfk_clear_on_reset(void);
#else
static inline int pfk_load_key_start(const struct bio *bio,
struct ice_crypto_setting *ice_setting, bool *is_pfe, bool async)
{
return -ENODEV;
}
static inline int pfk_load_key_end(const struct bio *bio, bool *is_pfe)
{
return -ENODEV;
}
static inline int pfk_remove_key(const unsigned char *key, size_t key_size)
{
return -ENODEV;
}
static inline bool pfk_allow_merge_bio(const struct bio *bio1,
const struct bio *bio2)
{
return true;
}
static inline void pfk_clear_on_reset(void)
{}
#endif /* CONFIG_PFK */
#endif /* PFK_H */