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_fs_info *fs_info,
  23                                struct btrfs_block_group_cache *block_group);
  24 int remove_block_group_free_space(struct btrfs_trans_handle *trans,
  25                                   struct btrfs_fs_info *fs_info,
  26                                   struct btrfs_block_group_cache *block_group);
  27 int add_to_free_space_tree(struct btrfs_trans_handle *trans,
  28                            struct btrfs_fs_info *fs_info,
  29                            u64 start, u64 size);
  30 int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
  31                                 struct btrfs_fs_info *fs_info,
  32                                 u64 start, u64 size);
  33
  34 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
  35 struct btrfs_free_space_info *
  36 search_free_space_info(struct btrfs_trans_handle *trans,
  37                        struct btrfs_fs_info *fs_info,
  38                        struct btrfs_block_group_cache *block_group,
  39                        struct btrfs_path *path, int cow);
  40 int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
  41                              struct btrfs_fs_info *fs_info,
  42                              struct btrfs_block_group_cache *block_group,
  43                              struct btrfs_path *path, u64 start, u64 size);
  44 int __remove_from_free_space_tree(struct btrfs_trans_handle *trans,
  45                                   struct btrfs_fs_info *fs_info,
  46                                   struct btrfs_block_group_cache *block_group,
  47                                   struct btrfs_path *path, u64 start, u64 size);
  48 int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
  49                                   struct btrfs_fs_info *fs_info,
  50                                   struct btrfs_block_group_cache *block_group,
  51                                   struct btrfs_path *path);
  52 int convert_free_space_to_extents(struct btrfs_trans_handle *trans,
  53                                   struct btrfs_fs_info *fs_info,
  54                                   struct btrfs_block_group_cache *block_group,
  55                                   struct btrfs_path *path);
  56 int free_space_test_bit(struct btrfs_block_group_cache *block_group,
  57                         struct btrfs_path *path, u64 offset);
  58 #endif
  59
  60 #endif