fs/btrfs/disk-io.h

   1 /*
   2  * Copyright (C) 2007 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 __DISKIO__
  20 #define __DISKIO__
  21
  22 #define BTRFS_SUPER_INFO_OFFSET (16 * 1024)
  23
  24 struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
  25                                       u32 blocksize);
  26 int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize);
  27 struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
  28                                                    u64 bytenr, u32 blocksize);
  29 int clean_tree_block(struct btrfs_trans_handle *trans,
  30                      struct btrfs_root *root, struct extent_buffer *buf);
  31 struct btrfs_root *open_ctree(struct super_block *sb);
  32 int close_ctree(struct btrfs_root *root);
  33 int write_ctree_super(struct btrfs_trans_handle *trans,
  34                       struct btrfs_root *root);
  35 struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
  36                                             u64 bytenr, u32 blocksize);
  37 struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
  38                                       struct btrfs_key *location,
  39                                       const char *name, int namelen);
  40 struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info,
  41                                                struct btrfs_key *location);
  42 int btrfs_insert_dev_radix(struct btrfs_root *root,
  43                            struct block_device *bdev,
  44                            u64 device_id,
  45                            u64 block_start,
  46                            u64 num_blocks);
  47 void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr);
  48 int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);
  49 void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
  50 int btrfs_buffer_uptodate(struct extent_buffer *buf);
  51 int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
  52 int wait_on_tree_block_writeback(struct btrfs_root *root,
  53                                  struct extent_buffer *buf);
  54 void btrfs_set_buffer_defrag(struct extent_buffer *buf);
  55 void btrfs_set_buffer_defrag_done(struct extent_buffer *buf);
  56 int btrfs_buffer_defrag(struct extent_buffer *buf);
  57 int btrfs_buffer_defrag_done(struct extent_buffer *buf);
  58 int btrfs_clear_buffer_defrag(struct extent_buffer *buf);
  59 int btrfs_clear_buffer_defrag_done(struct extent_buffer *buf);
  60 int btrfs_read_buffer(struct extent_buffer *buf);
  61 u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len);
  62 void btrfs_csum_final(u32 crc, char *result);
  63 #endif