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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
bbd3e064 CH |
2 | #ifndef LINUX_PR_H |
3 | #define LINUX_PR_H | |
4 | ||
5 | #include <uapi/linux/pr.h> | |
6 | ||
c787f1ba MC |
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 | ||
bbd3e064 CH |
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); | |
c787f1ba MC |
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); | |
bbd3e064 CH |
42 | }; |
43 | ||
44 | #endif /* LINUX_PR_H */ |