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blk-crypto: add a bio_crypt_ctx() helper

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This returns the bio_crypt_ctx if CONFIG_BLK_INLINE_ENCRYPTION is enabled
and a crypto context is attached to the bio, else NULL.

The use case is to allow safely dereferencing the context in common code
without needed #ifdef CONFIG_BLK_INLINE_ENCRYPTION.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2026-01-09 07:07:43 +01:00 committed by Jens Axboe
parent bc26e2efa2
commit a3cc978e61
1 changed files with 10 additions and 0 deletions
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10
include/linux/blk-crypto.h
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@ -132,6 +132,11 @@ static inline bool bio_has_crypt_ctx(struct bio *bio)
return bio->bi_crypt_context;
}
static inline struct bio_crypt_ctx *bio_crypt_ctx(struct bio *bio)
{
return bio->bi_crypt_context;
}
void bio_crypt_set_ctx(struct bio *bio, const struct blk_crypto_key *key,
const u64 dun[BLK_CRYPTO_DUN_ARRAY_SIZE],
gfp_t gfp_mask);
@ -169,6 +174,11 @@ static inline bool bio_has_crypt_ctx(struct bio *bio)
return false;
}
static inline struct bio_crypt_ctx *bio_crypt_ctx(struct bio *bio)
{
return NULL;
}
#endif /* CONFIG_BLK_INLINE_ENCRYPTION */
int __bio_crypt_clone(struct bio *dst, struct bio *src, gfp_t gfp_mask);