fs/btrfs/free-space-tree.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2015 Facebook.  All rights reserved.
   4  */
   5
   6 #ifndef BTRFS_FREE_SPACE_TREE_H
   7 #define BTRFS_FREE_SPACE_TREE_H
   8
   9 /*
  10  * The default size for new free space bitmap items. The last bitmap in a block
  11  * group may be truncated, and none of the free space tree code assumes that
  12  * existing bitmaps are this size.
  13  */
  14 #define BTRFS_FREE_SPACE_BITMAP_SIZE 256
  15 #define BTRFS_FREE_SPACE_BITMAP_BITS (BTRFS_FREE_SPACE_BITMAP_SIZE * BITS_PER_BYTE)
  16
  17 void set_free_space_tree_thresholds(struct btrfs_block_group_cache *block_group);
  18 int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info);
  19 int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info);
  20 int load_free_space_tree(struct btrfs_caching_control *caching_ctl);
  21 int add_block_group_free_space(struct btrfs_trans_handle *trans,
  22                                struct btrfs_block_group_cache *block_group);
  23 int remove_block_group_free_space(struct btrfs_trans_handle *trans,
  24                                   struct btrfs_block_group_cache *block_group);
  25 int add_to_free_space_tree(struct btrfs_trans_handle *trans,
  26                            u64 start, u64 size);
  27 int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
  28                                 u64 start, u64 size);
  29
  30 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
  31 struct btrfs_free_space_info *
  32 search_free_space_info(struct btrfs_trans_handle *trans,
  33                        struct btrfs_fs_info *fs_info,
  34                        struct btrfs_block_group_cache *block_group,
  35                        struct btrfs_path *path, int cow);
  36 int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
  37                              struct btrfs_block_group_cache *block_group,
  38                              struct btrfs_path *path, u64 start, u64 size);
  39 int __remove_from_free_space_tree(struct btrfs_trans_handle *trans,
  40                                   struct btrfs_block_group_cache *block_group,
  41                                   struct btrfs_path *path, u64 start, u64 size);
  42 int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
  43                                   struct btrfs_block_group_cache *block_group,
  44                                   struct btrfs_path *path);
  45 int convert_free_space_to_extents(struct btrfs_trans_handle *trans,
  46                                   struct btrfs_block_group_cache *block_group,
  47                                   struct btrfs_path *path);
  48 int free_space_test_bit(struct btrfs_block_group_cache *block_group,
  49                         struct btrfs_path *path, u64 offset);
  50 #endif
  51
  52 #endif