fs/btrfs/free-space-cache.h

   1 /*
   2  * Copyright (C) 2009 Oracle.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public
   6  * License v2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public
  14  * License along with this program; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 021110-1307, USA.
  17  */
  18
  19 #ifndef __BTRFS_FREE_SPACE_CACHE
  20 #define __BTRFS_FREE_SPACE_CACHE
  21
  22 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
  23                          u64 bytenr, u64 size);
  24 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
  25                             u64 bytenr, u64 size);
  26 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
  27                                    *block_group);
  28 u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
  29                                u64 offset, u64 bytes, u64 empty_size);
  30 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
  31                            u64 bytes);
  32 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);
  33 int btrfs_find_space_cluster(struct btrfs_trans_handle *trans,
  34                              struct btrfs_block_group_cache *block_group,
  35                              struct btrfs_free_cluster *cluster,
  36                              u64 offset, u64 bytes, u64 empty_size);
  37 void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
  38 u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
  39                              struct btrfs_free_cluster *cluster, u64 bytes,
  40                              u64 min_start);
  41 int btrfs_return_cluster_to_free_space(
  42                                struct btrfs_block_group_cache *block_group,
  43                                struct btrfs_free_cluster *cluster);
  44 #endif