| Martin K. Petersen | 2341c2f | 2014-09-26 19:20:07 -0400 | [diff] [blame] | 1 | #ifndef _LINUX_T10_PI_H |
| 2 | #define _LINUX_T10_PI_H |
| 3 | |
| 4 | #include <linux/types.h> |
| 5 | #include <linux/blkdev.h> |
| 6 | |
| 7 | /* |
| Christoph Hellwig | 8475c81 | 2016-09-11 19:35:41 +0200 | [diff] [blame] | 8 | * A T10 PI-capable target device can be formatted with different |
| 9 | * protection schemes. Currently 0 through 3 are defined: |
| 10 | * |
| 11 | * Type 0 is regular (unprotected) I/O |
| 12 | * |
| 13 | * Type 1 defines the contents of the guard and reference tags |
| 14 | * |
| 15 | * Type 2 defines the contents of the guard and reference tags and |
| 16 | * uses 32-byte commands to seed the latter |
| 17 | * |
| 18 | * Type 3 defines the contents of the guard tag only |
| 19 | */ |
| 20 | enum t10_dif_type { |
| 21 | T10_PI_TYPE0_PROTECTION = 0x0, |
| 22 | T10_PI_TYPE1_PROTECTION = 0x1, |
| 23 | T10_PI_TYPE2_PROTECTION = 0x2, |
| 24 | T10_PI_TYPE3_PROTECTION = 0x3, |
| 25 | }; |
| 26 | |
| 27 | /* |
| Martin K. Petersen | 2341c2f | 2014-09-26 19:20:07 -0400 | [diff] [blame] | 28 | * T10 Protection Information tuple. |
| 29 | */ |
| 30 | struct t10_pi_tuple { |
| 31 | __be16 guard_tag; /* Checksum */ |
| 32 | __be16 app_tag; /* Opaque storage */ |
| 33 | __be32 ref_tag; /* Target LBA or indirect LBA */ |
| 34 | }; |
| 35 | |
| 36 | |
| Martin K. Petersen | 0f8087e | 2015-10-21 13:19:33 -0400 | [diff] [blame] | 37 | extern struct blk_integrity_profile t10_pi_type1_crc; |
| 38 | extern struct blk_integrity_profile t10_pi_type1_ip; |
| 39 | extern struct blk_integrity_profile t10_pi_type3_crc; |
| 40 | extern struct blk_integrity_profile t10_pi_type3_ip; |
| Martin K. Petersen | 2341c2f | 2014-09-26 19:20:07 -0400 | [diff] [blame] | 41 | |
| 42 | #endif |