summaryrefslogblamecommitdiff
path: root/include/linux/t10-pi.h
blob: 9375d23a24e7aba97504d743e77d3b78f4d72493 (plain) (tree) 
2341c2f8c331 ^







8475c8118551 ^




















2341c2f8c331 ^









869ab90f0ae0 ^




2341c2f8c331 ^


1
2
3
4
5
6
7

8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

28
29
30
31
32
33
34
35
36

37
38
39
40

41
42







                         



















                                                                  








                                                                



                                                           

      
#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 */
};


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;

#endif