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 #include <linux/bits.h>
  10
  11 struct btrfs_caching_control;
  12 struct btrfs_fs_info;
  13 struct btrfs_path;
  14 struct btrfs_block_group;
  15 struct btrfs_trans_handle;
  16
  17 /*
  18  * The default size for new free space bitmap items. The last bitmap in a block
  19  * group may be truncated, and none of the free space tree code assumes that
  20  * existing bitmaps are this size.
  21  */
  22 #define BTRFS_FREE_SPACE_BITMAP_SIZE 256
  23 #define BTRFS_FREE_SPACE_BITMAP_BITS (BTRFS_FREE_SPACE_BITMAP_SIZE * BITS_PER_BYTE)
  24
  25 void set_free_space_tree_thresholds(struct btrfs_block_group *block_group);
  26 int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info);
  27 int btrfs_delete_free_space_tree(struct btrfs_fs_info *fs_info);
  28 int btrfs_rebuild_free_space_tree(struct btrfs_fs_info *fs_info);
  29 int load_free_space_tree(struct btrfs_caching_control *caching_ctl);
  30 int add_block_group_free_space(struct btrfs_trans_handle *trans,
  31                                struct btrfs_block_group *block_group);
  32 int remove_block_group_free_space(struct btrfs_trans_handle *trans,
  33                                   struct btrfs_block_group *block_group);
  34 int add_to_free_space_tree(struct btrfs_trans_handle *trans,
  35                            u64 start, u64 size);
  36 int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
  37                                 u64 start, u64 size);
  38
  39 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
  40 struct btrfs_free_space_info *
  41 search_free_space_info(struct btrfs_trans_handle *trans,
  42                        struct btrfs_block_group *block_group,
  43                        struct btrfs_path *path, int cow);
  44 int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
  45                              struct btrfs_block_group *block_group,
  46                              struct btrfs_path *path, u64 start, u64 size);
  47 int __remove_from_free_space_tree(struct btrfs_trans_handle *trans,
  48                                   struct btrfs_block_group *block_group,
  49                                   struct btrfs_path *path, u64 start, u64 size);
  50 int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
  51                                   struct btrfs_block_group *block_group,
  52                                   struct btrfs_path *path);
  53 int convert_free_space_to_extents(struct btrfs_trans_handle *trans,
  54                                   struct btrfs_block_group *block_group,
  55                                   struct btrfs_path *path);
  56 int free_space_test_bit(struct btrfs_block_group *block_group,
  57                         struct btrfs_path *path, u64 offset);
  58 #endif
  59
  60 #endif