mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
08fcf81328
Fixes a link failure whtn BLK_DEV_INTEGRITY isn't defined.
Fixes: 10c41ddd61 ("block: move dif_prepare/dif_complete functions to block layer")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_T10_PI_H
|
|
#define _LINUX_T10_PI_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/blkdev.h>
|
|
|
|
/*
|
|
* A T10 PI-capable target device can be formatted with different
|
|
* protection schemes. Currently 0 through 3 are defined:
|
|
*
|
|
* Type 0 is regular (unprotected) I/O
|
|
*
|
|
* Type 1 defines the contents of the guard and reference tags
|
|
*
|
|
* Type 2 defines the contents of the guard and reference tags and
|
|
* uses 32-byte commands to seed the latter
|
|
*
|
|
* Type 3 defines the contents of the guard tag only
|
|
*/
|
|
enum t10_dif_type {
|
|
T10_PI_TYPE0_PROTECTION = 0x0,
|
|
T10_PI_TYPE1_PROTECTION = 0x1,
|
|
T10_PI_TYPE2_PROTECTION = 0x2,
|
|
T10_PI_TYPE3_PROTECTION = 0x3,
|
|
};
|
|
|
|
/*
|
|
* T10 Protection Information tuple.
|
|
*/
|
|
struct t10_pi_tuple {
|
|
__be16 guard_tag; /* Checksum */
|
|
__be16 app_tag; /* Opaque storage */
|
|
__be32 ref_tag; /* Target LBA or indirect LBA */
|
|
};
|
|
|
|
#define T10_PI_APP_ESCAPE cpu_to_be16(0xffff)
|
|
#define T10_PI_REF_ESCAPE cpu_to_be32(0xffffffff)
|
|
|
|
static inline u32 t10_pi_ref_tag(struct request *rq)
|
|
{
|
|
#ifdef CONFIG_BLK_DEV_INTEGRITY
|
|
return blk_rq_pos(rq) >>
|
|
(rq->q->integrity.interval_exp - 9) & 0xffffffff;
|
|
#else
|
|
return -1U;
|
|
#endif
|
|
}
|
|
|
|
extern const struct blk_integrity_profile t10_pi_type1_crc;
|
|
extern const struct blk_integrity_profile t10_pi_type1_ip;
|
|
extern const struct blk_integrity_profile t10_pi_type3_crc;
|
|
extern const struct blk_integrity_profile t10_pi_type3_ip;
|
|
|
|
#ifdef CONFIG_BLK_DEV_INTEGRITY
|
|
extern void t10_pi_prepare(struct request *rq, u8 protection_type);
|
|
extern void t10_pi_complete(struct request *rq, u8 protection_type,
|
|
unsigned int intervals);
|
|
#else
|
|
static inline void t10_pi_complete(struct request *rq, u8 protection_type,
|
|
unsigned int intervals)
|
|
{
|
|
}
|
|
static inline void t10_pi_prepare(struct request *rq, u8 protection_type)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#endif
|