fs/btrfs/discard.h

   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 bool btrfs_run_discard_work(struct btrfs_discard_ctl *discard_ctl);
  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