blk-crypto-internal.h
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright 2019 Google LLC
*/
#ifndef __LINUX_BLK_CRYPTO_INTERNAL_H
#define __LINUX_BLK_CRYPTO_INTERNAL_H
#include <linux/bio.h>
/* Represents a crypto mode supported by blk-crypto */
struct blk_crypto_mode {
const char *cipher_str; /* crypto API name (for fallback case) */
unsigned int keysize; /* key size in bytes */
unsigned int ivsize; /* iv size in bytes */
};
extern const struct blk_crypto_mode blk_crypto_modes[];
#ifdef CONFIG_BLK_INLINE_ENCRYPTION_FALLBACK
int blk_crypto_fallback_start_using_mode(enum blk_crypto_mode_num mode_num);
int blk_crypto_fallback_submit_bio(struct bio **bio_ptr);
bool blk_crypto_queue_decrypt_bio(struct bio *bio);
int blk_crypto_fallback_evict_key(const struct blk_crypto_key *key);
bool bio_crypt_fallback_crypted(const struct bio_crypt_ctx *bc);
#else /* CONFIG_BLK_INLINE_ENCRYPTION_FALLBACK */
static inline int
blk_crypto_fallback_start_using_mode(enum blk_crypto_mode_num mode_num)
{
pr_warn_once("crypto API fallback is disabled\n");
return -ENOPKG;
}
static inline bool bio_crypt_fallback_crypted(const struct bio_crypt_ctx *bc)
{
return false;
}
static inline int blk_crypto_fallback_submit_bio(struct bio **bio_ptr)
{
pr_warn_once("crypto API fallback disabled; failing request\n");
(*bio_ptr)->bi_status = BLK_STS_NOTSUPP;
return -EIO;
}
static inline bool blk_crypto_queue_decrypt_bio(struct bio *bio)
{
WARN_ON(1);
return false;
}
static inline int
blk_crypto_fallback_evict_key(const struct blk_crypto_key *key)
{
return 0;
}
#endif /* CONFIG_BLK_INLINE_ENCRYPTION_FALLBACK */
#endif /* __LINUX_BLK_CRYPTO_INTERNAL_H */