155 lines
4.0 KiB
C
155 lines
4.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_BLK_INTEGRITY_H
|
|
#define _LINUX_BLK_INTEGRITY_H
|
|
|
|
#include <linux/blk-mq.h>
|
|
#include <linux/bio-integrity.h>
|
|
|
|
struct request;
|
|
|
|
enum blk_integrity_flags {
|
|
BLK_INTEGRITY_NOVERIFY = 1 << 0,
|
|
BLK_INTEGRITY_NOGENERATE = 1 << 1,
|
|
BLK_INTEGRITY_DEVICE_CAPABLE = 1 << 2,
|
|
BLK_INTEGRITY_REF_TAG = 1 << 3,
|
|
BLK_INTEGRITY_STACKED = 1 << 4,
|
|
};
|
|
|
|
const char *blk_integrity_profile_name(struct blk_integrity *bi);
|
|
bool queue_limits_stack_integrity(struct queue_limits *t,
|
|
struct queue_limits *b);
|
|
static inline bool queue_limits_stack_integrity_bdev(struct queue_limits *t,
|
|
struct block_device *bdev)
|
|
{
|
|
return queue_limits_stack_integrity(t, &bdev->bd_disk->queue->limits);
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_INTEGRITY
|
|
int blk_rq_map_integrity_sg(struct request *, struct scatterlist *);
|
|
int blk_rq_count_integrity_sg(struct request_queue *, struct bio *);
|
|
int blk_rq_integrity_map_user(struct request *rq, void __user *ubuf,
|
|
ssize_t bytes, u32 seed);
|
|
|
|
static inline bool
|
|
blk_integrity_queue_supports_integrity(struct request_queue *q)
|
|
{
|
|
return q->limits.integrity.tuple_size;
|
|
}
|
|
|
|
static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
|
|
{
|
|
if (!blk_integrity_queue_supports_integrity(disk->queue))
|
|
return NULL;
|
|
return &disk->queue->limits.integrity;
|
|
}
|
|
|
|
static inline struct blk_integrity *
|
|
bdev_get_integrity(struct block_device *bdev)
|
|
{
|
|
return blk_get_integrity(bdev->bd_disk);
|
|
}
|
|
|
|
static inline unsigned short
|
|
queue_max_integrity_segments(const struct request_queue *q)
|
|
{
|
|
return q->limits.max_integrity_segments;
|
|
}
|
|
|
|
/**
|
|
* bio_integrity_intervals - Return number of integrity intervals for a bio
|
|
* @bi: blk_integrity profile for device
|
|
* @sectors: Size of the bio in 512-byte sectors
|
|
*
|
|
* Description: The block layer calculates everything in 512 byte
|
|
* sectors but integrity metadata is done in terms of the data integrity
|
|
* interval size of the storage device. Convert the block layer sectors
|
|
* to the appropriate number of integrity intervals.
|
|
*/
|
|
static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
|
|
unsigned int sectors)
|
|
{
|
|
return sectors >> (bi->interval_exp - 9);
|
|
}
|
|
|
|
static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
|
|
unsigned int sectors)
|
|
{
|
|
return bio_integrity_intervals(bi, sectors) * bi->tuple_size;
|
|
}
|
|
|
|
static inline bool blk_integrity_rq(struct request *rq)
|
|
{
|
|
return rq->cmd_flags & REQ_INTEGRITY;
|
|
}
|
|
|
|
/*
|
|
* Return the current bvec that contains the integrity data. bip_iter may be
|
|
* advanced to iterate over the integrity data.
|
|
*/
|
|
static inline struct bio_vec rq_integrity_vec(struct request *rq)
|
|
{
|
|
return mp_bvec_iter_bvec(rq->bio->bi_integrity->bip_vec,
|
|
rq->bio->bi_integrity->bip_iter);
|
|
}
|
|
#else /* CONFIG_BLK_DEV_INTEGRITY */
|
|
static inline int blk_rq_count_integrity_sg(struct request_queue *q,
|
|
struct bio *b)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int blk_rq_map_integrity_sg(struct request *q,
|
|
struct scatterlist *s)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int blk_rq_integrity_map_user(struct request *rq,
|
|
void __user *ubuf,
|
|
ssize_t bytes,
|
|
u32 seed)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
static inline struct blk_integrity *bdev_get_integrity(struct block_device *b)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline bool
|
|
blk_integrity_queue_supports_integrity(struct request_queue *q)
|
|
{
|
|
return false;
|
|
}
|
|
static inline unsigned short
|
|
queue_max_integrity_segments(const struct request_queue *q)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
|
|
unsigned int sectors)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
|
|
unsigned int sectors)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int blk_integrity_rq(struct request *rq)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline struct bio_vec rq_integrity_vec(struct request *rq)
|
|
{
|
|
/* the optimizer will remove all calls to this function */
|
|
return (struct bio_vec){ };
|
|
}
|
|
#endif /* CONFIG_BLK_DEV_INTEGRITY */
|
|
|
|
#endif /* _LINUX_BLK_INTEGRITY_H */
|