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