cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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free-space-tree.h (2167B)

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