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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright 2019 Google LLC
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*/
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#ifndef __LINUX_BLK_CRYPTO_H
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#define __LINUX_BLK_CRYPTO_H
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enum blk_crypto_mode_num {
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BLK_ENCRYPTION_MODE_INVALID,
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BLK_ENCRYPTION_MODE_AES_256_XTS,
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BLK_ENCRYPTION_MODE_AES_128_CBC_ESSIV,
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BLK_ENCRYPTION_MODE_ADIANTUM,
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BLK_ENCRYPTION_MODE_MAX,
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};
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#define BLK_CRYPTO_MAX_KEY_SIZE 64
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/**
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* struct blk_crypto_config - an inline encryption key's crypto configuration
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* @crypto_mode: encryption algorithm this key is for
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* @data_unit_size: the data unit size for all encryption/decryptions with this
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* key. This is the size in bytes of each individual plaintext and
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* ciphertext. This is always a power of 2. It might be e.g. the
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* filesystem block size or the disk sector size.
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* @dun_bytes: the maximum number of bytes of DUN used when using this key
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*/
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struct blk_crypto_config {
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enum blk_crypto_mode_num crypto_mode;
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unsigned int data_unit_size;
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unsigned int dun_bytes;
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};
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/**
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* struct blk_crypto_key - an inline encryption key
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* @crypto_cfg: the crypto configuration (like crypto_mode, key size) for this
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* key
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* @data_unit_size_bits: log2 of data_unit_size
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* @size: size of this key in bytes (determined by @crypto_cfg.crypto_mode)
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* @raw: the raw bytes of this key. Only the first @size bytes are used.
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*
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* A blk_crypto_key is immutable once created, and many bios can reference it at
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* the same time. It must not be freed until all bios using it have completed
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* and it has been evicted from all devices on which it may have been used.
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*/
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struct blk_crypto_key {
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struct blk_crypto_config crypto_cfg;
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unsigned int data_unit_size_bits;
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unsigned int size;
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u8 raw[BLK_CRYPTO_MAX_KEY_SIZE];
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};
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#endif /* __LINUX_BLK_CRYPTO_H */
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