xref: /openbmc/linux/fs/btrfs/discard.h (revision bb5167e6)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 
3 #ifndef BTRFS_DISCARD_H
4 #define BTRFS_DISCARD_H
5 
6 #include <linux/sizes.h>
7 
8 struct btrfs_fs_info;
9 struct btrfs_discard_ctl;
10 struct btrfs_block_group;
11 
12 /* Discard size limits */
13 #define BTRFS_ASYNC_DISCARD_DEFAULT_MAX_SIZE		(SZ_64M)
14 #define BTRFS_ASYNC_DISCARD_MAX_FILTER			(SZ_1M)
15 #define BTRFS_ASYNC_DISCARD_MIN_FILTER			(SZ_32K)
16 
17 /* List operations */
18 void btrfs_discard_check_filter(struct btrfs_block_group *block_group, u64 bytes);
19 
20 /* Work operations */
21 void btrfs_discard_cancel_work(struct btrfs_discard_ctl *discard_ctl,
22 			       struct btrfs_block_group *block_group);
23 void btrfs_discard_queue_work(struct btrfs_discard_ctl *discard_ctl,
24 			      struct btrfs_block_group *block_group);
25 void btrfs_discard_schedule_work(struct btrfs_discard_ctl *discard_ctl,
26 				 bool override);
27 
28 /* Update operations */
29 void btrfs_discard_calc_delay(struct btrfs_discard_ctl *discard_ctl);
30 void btrfs_discard_update_discardable(struct btrfs_block_group *block_group);
31 
32 /* Setup/cleanup operations */
33 void btrfs_discard_punt_unused_bgs_list(struct btrfs_fs_info *fs_info);
34 void btrfs_discard_resume(struct btrfs_fs_info *fs_info);
35 void btrfs_discard_stop(struct btrfs_fs_info *fs_info);
36 void btrfs_discard_init(struct btrfs_fs_info *fs_info);
37 void btrfs_discard_cleanup(struct btrfs_fs_info *fs_info);
38 
39 #endif
40