| #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 struct blk_integrity_profile t10_pi_type1_crc; |
| extern struct blk_integrity_profile t10_pi_type1_ip; |
| extern struct blk_integrity_profile t10_pi_type3_crc; |
| extern struct blk_integrity_profile t10_pi_type3_ip; |
| |
| #endif |