Contributors: 26
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Christoph Hellwig |
399 |
57.08% |
10 |
18.87% |
| Martin K. Petersen |
128 |
18.31% |
10 |
18.87% |
| Jens Axboe |
49 |
7.01% |
6 |
11.32% |
| Stephen Rothwell |
25 |
3.58% |
1 |
1.89% |
| Satya Tangirala |
11 |
1.57% |
2 |
3.77% |
| Paolo Bonzini |
8 |
1.14% |
1 |
1.89% |
| Max Gurtovoy |
8 |
1.14% |
1 |
1.89% |
| Olaf Kirch |
7 |
1.00% |
1 |
1.89% |
| Johannes Thumshirn |
6 |
0.86% |
1 |
1.89% |
| Vishal Verma |
6 |
0.86% |
1 |
1.89% |
| Greg Ungerer |
6 |
0.86% |
1 |
1.89% |
| Kent Overstreet |
5 |
0.72% |
1 |
1.89% |
| Ming Lei |
5 |
0.72% |
1 |
1.89% |
| Michael Christie |
4 |
0.57% |
1 |
1.89% |
| Keith Busch |
4 |
0.57% |
1 |
1.89% |
| Chaitanya Kulkarni |
4 |
0.57% |
1 |
1.89% |
| Goldwyn Rodrigues |
4 |
0.57% |
2 |
3.77% |
| Linus Torvalds |
4 |
0.57% |
1 |
1.89% |
| Al Viro |
3 |
0.43% |
2 |
3.77% |
| Israel Rukshin |
3 |
0.43% |
2 |
3.77% |
| Linus Torvalds (pre-git) |
2 |
0.29% |
1 |
1.89% |
| Bart Van Assche |
2 |
0.29% |
1 |
1.89% |
| Dan J Williams |
2 |
0.29% |
1 |
1.89% |
| Omar Sandoval |
2 |
0.29% |
1 |
1.89% |
| Jan Kara |
1 |
0.14% |
1 |
1.89% |
| Greg Kroah-Hartman |
1 |
0.14% |
1 |
1.89% |
| Total |
699 |
|
53 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_BLK_INTEGRITY_H
#define _LINUX_BLK_INTEGRITY_H
#include <linux/blk-mq.h>
struct request;
enum blk_integrity_flags {
BLK_INTEGRITY_VERIFY = 1 << 0,
BLK_INTEGRITY_GENERATE = 1 << 1,
BLK_INTEGRITY_DEVICE_CAPABLE = 1 << 2,
BLK_INTEGRITY_IP_CHECKSUM = 1 << 3,
};
struct blk_integrity_iter {
void *prot_buf;
void *data_buf;
sector_t seed;
unsigned int data_size;
unsigned short interval;
unsigned char tuple_size;
const char *disk_name;
};
typedef blk_status_t (integrity_processing_fn) (struct blk_integrity_iter *);
typedef void (integrity_prepare_fn) (struct request *);
typedef void (integrity_complete_fn) (struct request *, unsigned int);
struct blk_integrity_profile {
integrity_processing_fn *generate_fn;
integrity_processing_fn *verify_fn;
integrity_prepare_fn *prepare_fn;
integrity_complete_fn *complete_fn;
const char *name;
};
#ifdef CONFIG_BLK_DEV_INTEGRITY
void blk_integrity_register(struct gendisk *, struct blk_integrity *);
void blk_integrity_unregister(struct gendisk *);
int blk_integrity_compare(struct gendisk *, struct gendisk *);
int blk_rq_map_integrity_sg(struct request_queue *, struct bio *,
struct scatterlist *);
int blk_rq_count_integrity_sg(struct request_queue *, struct bio *);
static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
{
struct blk_integrity *bi = &disk->queue->integrity;
if (!bi->profile)
return NULL;
return bi;
}
static inline struct blk_integrity *
bdev_get_integrity(struct block_device *bdev)
{
return blk_get_integrity(bdev->bd_disk);
}
static inline bool
blk_integrity_queue_supports_integrity(struct request_queue *q)
{
return q->integrity.profile;
}
static inline void blk_queue_max_integrity_segments(struct request_queue *q,
unsigned int segs)
{
q->limits.max_integrity_segments = segs;
}
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 first bvec that contains integrity data. Only drivers that are
* limited to a single integrity segment should use this helper.
*/
static inline struct bio_vec *rq_integrity_vec(struct request *rq)
{
if (WARN_ON_ONCE(queue_max_integrity_segments(rq->q) > 1))
return NULL;
return rq->bio->bi_integrity->bip_vec;
}
#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_queue *q,
struct bio *b,
struct scatterlist *s)
{
return 0;
}
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 int blk_integrity_compare(struct gendisk *a, struct gendisk *b)
{
return 0;
}
static inline void blk_integrity_register(struct gendisk *d,
struct blk_integrity *b)
{
}
static inline void blk_integrity_unregister(struct gendisk *d)
{
}
static inline void blk_queue_max_integrity_segments(struct request_queue *q,
unsigned int segs)
{
}
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)
{
return NULL;
}
#endif /* CONFIG_BLK_DEV_INTEGRITY */
#endif /* _LINUX_BLK_INTEGRITY_H */