| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|
| 2 | #ifndef LINUX_PR_H |
|---|
| 3 | #define LINUX_PR_H |
|---|
| 4 | |
|---|
| 5 | #include <uapi/linux/pr.h> |
|---|
| 6 | |
|---|
| 7 | struct pr_keys { |
|---|
| 8 | u32 generation; |
|---|
| 9 | u32 num_keys; |
|---|
| 10 | u64 keys[]; |
|---|
| 11 | }; |
|---|
| 12 | |
|---|
| 13 | struct pr_held_reservation { |
|---|
| 14 | u64 key; |
|---|
| 15 | u32 generation; |
|---|
| 16 | enum pr_type type; |
|---|
| 17 | }; |
|---|
| 18 | |
|---|
| 19 | struct pr_ops { |
|---|
| 20 | int (*pr_register)(struct block_device *bdev, u64 old_key, u64 new_key, |
|---|
| 21 | u32 flags); |
|---|
| 22 | int (*pr_reserve)(struct block_device *bdev, u64 key, |
|---|
| 23 | enum pr_type type, u32 flags); |
|---|
| 24 | int (*pr_release)(struct block_device *bdev, u64 key, |
|---|
| 25 | enum pr_type type); |
|---|
| 26 | int (*pr_preempt)(struct block_device *bdev, u64 old_key, u64 new_key, |
|---|
| 27 | enum pr_type type, bool abort); |
|---|
| 28 | int (*pr_clear)(struct block_device *bdev, u64 key); |
|---|
| 29 | /* |
|---|
| 30 | * pr_read_keys - Read the registered keys and return them in the |
|---|
| 31 | * pr_keys->keys array. The keys array will have been allocated at the |
|---|
| 32 | * end of the pr_keys struct, and pr_keys->num_keys must be set to the |
|---|
| 33 | * number of keys the array can hold. If there are more than can fit |
|---|
| 34 | * in the array, success will still be returned and pr_keys->num_keys |
|---|
| 35 | * will reflect the total number of keys the device contains, so the |
|---|
| 36 | * caller can retry with a larger array. |
|---|
| 37 | */ |
|---|
| 38 | int (*pr_read_keys)(struct block_device *bdev, |
|---|
| 39 | struct pr_keys *keys_info); |
|---|
| 40 | int (*pr_read_reservation)(struct block_device *bdev, |
|---|
| 41 | struct pr_held_reservation *rsv); |
|---|
| 42 | }; |
|---|
| 43 | |
|---|
| 44 | #endif /* LINUX_PR_H */ |
|---|
| 45 | |
|---|
