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