1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef BTRFS_DISCARD_H 4 #define BTRFS_DISCARD_H 5 6 #include <linux/types.h> 7 #include <linux/sizes.h> 8 9 struct btrfs_fs_info; 10 struct btrfs_discard_ctl; 11 struct btrfs_block_group; 12 13 /* Discard size limits */ 14 #define BTRFS_ASYNC_DISCARD_DEFAULT_MAX_SIZE (SZ_64M) 15 #define BTRFS_ASYNC_DISCARD_MAX_FILTER (SZ_1M) 16 #define BTRFS_ASYNC_DISCARD_MIN_FILTER (SZ_32K) 17 18 /* List operations */ 19 void btrfs_discard_check_filter(struct btrfs_block_group *block_group, u64 bytes); 20 21 /* Work operations */ 22 void btrfs_discard_cancel_work(struct btrfs_discard_ctl *discard_ctl, 23 struct btrfs_block_group *block_group); 24 void btrfs_discard_queue_work(struct btrfs_discard_ctl *discard_ctl, 25 struct btrfs_block_group *block_group); 26 void btrfs_discard_schedule_work(struct btrfs_discard_ctl *discard_ctl, 27 bool override); 28 29 /* Update operations */ 30 void btrfs_discard_calc_delay(struct btrfs_discard_ctl *discard_ctl); 31 void btrfs_discard_update_discardable(struct btrfs_block_group *block_group); 32 33 /* Setup/cleanup operations */ 34 void btrfs_discard_punt_unused_bgs_list(struct btrfs_fs_info *fs_info); 35 void btrfs_discard_resume(struct btrfs_fs_info *fs_info); 36 void btrfs_discard_stop(struct btrfs_fs_info *fs_info); 37 void btrfs_discard_init(struct btrfs_fs_info *fs_info); 38 void btrfs_discard_cleanup(struct btrfs_fs_info *fs_info); 39 40 #endif 41