mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Christoph Hellwig](/assets/img/avatar_default.png)
struct request is only used by blk-mq drivers, so move it and all related declarations to blk-mq.h. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-18-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
212 lines
5.4 KiB
C
212 lines
5.4 KiB
C
/* 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>
|
|
#include <linux/blk-mq.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
|
|
|
|
void bio_crypt_dun_increment(u64 dun[BLK_CRYPTO_DUN_ARRAY_SIZE],
|
|
unsigned int inc);
|
|
|
|
bool bio_crypt_rq_ctx_compatible(struct request *rq, struct bio *bio);
|
|
|
|
bool bio_crypt_ctx_mergeable(struct bio_crypt_ctx *bc1, unsigned int bc1_bytes,
|
|
struct bio_crypt_ctx *bc2);
|
|
|
|
static inline bool bio_crypt_ctx_back_mergeable(struct request *req,
|
|
struct bio *bio)
|
|
{
|
|
return bio_crypt_ctx_mergeable(req->crypt_ctx, blk_rq_bytes(req),
|
|
bio->bi_crypt_context);
|
|
}
|
|
|
|
static inline bool bio_crypt_ctx_front_mergeable(struct request *req,
|
|
struct bio *bio)
|
|
{
|
|
return bio_crypt_ctx_mergeable(bio->bi_crypt_context,
|
|
bio->bi_iter.bi_size, req->crypt_ctx);
|
|
}
|
|
|
|
static inline bool bio_crypt_ctx_merge_rq(struct request *req,
|
|
struct request *next)
|
|
{
|
|
return bio_crypt_ctx_mergeable(req->crypt_ctx, blk_rq_bytes(req),
|
|
next->crypt_ctx);
|
|
}
|
|
|
|
static inline void blk_crypto_rq_set_defaults(struct request *rq)
|
|
{
|
|
rq->crypt_ctx = NULL;
|
|
rq->crypt_keyslot = NULL;
|
|
}
|
|
|
|
static inline bool blk_crypto_rq_is_encrypted(struct request *rq)
|
|
{
|
|
return rq->crypt_ctx;
|
|
}
|
|
|
|
#else /* CONFIG_BLK_INLINE_ENCRYPTION */
|
|
|
|
static inline bool bio_crypt_rq_ctx_compatible(struct request *rq,
|
|
struct bio *bio)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static inline bool bio_crypt_ctx_front_mergeable(struct request *req,
|
|
struct bio *bio)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static inline bool bio_crypt_ctx_back_mergeable(struct request *req,
|
|
struct bio *bio)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static inline bool bio_crypt_ctx_merge_rq(struct request *req,
|
|
struct request *next)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static inline void blk_crypto_rq_set_defaults(struct request *rq) { }
|
|
|
|
static inline bool blk_crypto_rq_is_encrypted(struct request *rq)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
#endif /* CONFIG_BLK_INLINE_ENCRYPTION */
|
|
|
|
void __bio_crypt_advance(struct bio *bio, unsigned int bytes);
|
|
static inline void bio_crypt_advance(struct bio *bio, unsigned int bytes)
|
|
{
|
|
if (bio_has_crypt_ctx(bio))
|
|
__bio_crypt_advance(bio, bytes);
|
|
}
|
|
|
|
void __bio_crypt_free_ctx(struct bio *bio);
|
|
static inline void bio_crypt_free_ctx(struct bio *bio)
|
|
{
|
|
if (bio_has_crypt_ctx(bio))
|
|
__bio_crypt_free_ctx(bio);
|
|
}
|
|
|
|
static inline void bio_crypt_do_front_merge(struct request *rq,
|
|
struct bio *bio)
|
|
{
|
|
#ifdef CONFIG_BLK_INLINE_ENCRYPTION
|
|
if (bio_has_crypt_ctx(bio))
|
|
memcpy(rq->crypt_ctx->bc_dun, bio->bi_crypt_context->bc_dun,
|
|
sizeof(rq->crypt_ctx->bc_dun));
|
|
#endif
|
|
}
|
|
|
|
bool __blk_crypto_bio_prep(struct bio **bio_ptr);
|
|
static inline bool blk_crypto_bio_prep(struct bio **bio_ptr)
|
|
{
|
|
if (bio_has_crypt_ctx(*bio_ptr))
|
|
return __blk_crypto_bio_prep(bio_ptr);
|
|
return true;
|
|
}
|
|
|
|
blk_status_t __blk_crypto_init_request(struct request *rq);
|
|
static inline blk_status_t blk_crypto_init_request(struct request *rq)
|
|
{
|
|
if (blk_crypto_rq_is_encrypted(rq))
|
|
return __blk_crypto_init_request(rq);
|
|
return BLK_STS_OK;
|
|
}
|
|
|
|
void __blk_crypto_free_request(struct request *rq);
|
|
static inline void blk_crypto_free_request(struct request *rq)
|
|
{
|
|
if (blk_crypto_rq_is_encrypted(rq))
|
|
__blk_crypto_free_request(rq);
|
|
}
|
|
|
|
int __blk_crypto_rq_bio_prep(struct request *rq, struct bio *bio,
|
|
gfp_t gfp_mask);
|
|
/**
|
|
* blk_crypto_rq_bio_prep - Prepare a request's crypt_ctx when its first bio
|
|
* is inserted
|
|
* @rq: The request to prepare
|
|
* @bio: The first bio being inserted into the request
|
|
* @gfp_mask: Memory allocation flags
|
|
*
|
|
* Return: 0 on success, -ENOMEM if out of memory. -ENOMEM is only possible if
|
|
* @gfp_mask doesn't include %__GFP_DIRECT_RECLAIM.
|
|
*/
|
|
static inline int blk_crypto_rq_bio_prep(struct request *rq, struct bio *bio,
|
|
gfp_t gfp_mask)
|
|
{
|
|
if (bio_has_crypt_ctx(bio))
|
|
return __blk_crypto_rq_bio_prep(rq, bio, gfp_mask);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* blk_crypto_insert_cloned_request - Prepare a cloned request to be inserted
|
|
* into a request queue.
|
|
* @rq: the request being queued
|
|
*
|
|
* Return: BLK_STS_OK on success, nonzero on error.
|
|
*/
|
|
static inline blk_status_t blk_crypto_insert_cloned_request(struct request *rq)
|
|
{
|
|
|
|
if (blk_crypto_rq_is_encrypted(rq))
|
|
return blk_crypto_init_request(rq);
|
|
return BLK_STS_OK;
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_INLINE_ENCRYPTION_FALLBACK
|
|
|
|
int blk_crypto_fallback_start_using_mode(enum blk_crypto_mode_num mode_num);
|
|
|
|
bool blk_crypto_fallback_bio_prep(struct bio **bio_ptr);
|
|
|
|
int blk_crypto_fallback_evict_key(const struct blk_crypto_key *key);
|
|
|
|
#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 blk_crypto_fallback_bio_prep(struct bio **bio_ptr)
|
|
{
|
|
pr_warn_once("crypto API fallback disabled; failing request.\n");
|
|
(*bio_ptr)->bi_status = BLK_STS_NOTSUPP;
|
|
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 */
|