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 struct btrfs_device;
  24 struct btrfs_fs_devices;
  25
  26 struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
  27                                       u32 blocksize);
  28 int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize);
  29 struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
  30                                                    u64 bytenr, u32 blocksize);
  31 int clean_tree_block(struct btrfs_trans_handle *trans,
  32                      struct btrfs_root *root, struct extent_buffer *buf);
  33 struct btrfs_root *open_ctree(struct super_block *sb,
  34                               struct btrfs_fs_devices *fs_devices);
  35 int close_ctree(struct btrfs_root *root);
  36 int write_ctree_super(struct btrfs_trans_handle *trans,
  37                       struct btrfs_root *root);
  38 struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
  39                                             u64 bytenr, u32 blocksize);
  40 struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info,
  41                                         u64 root_objectid);
  42 struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
  43                                       struct btrfs_key *location,
  44                                       const char *name, int namelen);
  45 struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info,
  46                                                struct btrfs_key *location);
  47 struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
  48                                               struct btrfs_key *location);
  49 int btrfs_insert_dev_radix(struct btrfs_root *root,
  50                            struct block_device *bdev,
  51                            u64 device_id,
  52                            u64 block_start,
  53                            u64 num_blocks);
  54 void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr);
  55 int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);
  56 void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
  57 int btrfs_buffer_uptodate(struct extent_buffer *buf);
  58 int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
  59 int wait_on_tree_block_writeback(struct btrfs_root *root,
  60                                  struct extent_buffer *buf);
  61 void btrfs_set_buffer_defrag(struct extent_buffer *buf);
  62 void btrfs_set_buffer_defrag_done(struct extent_buffer *buf);
  63 int btrfs_buffer_defrag(struct extent_buffer *buf);
  64 int btrfs_buffer_defrag_done(struct extent_buffer *buf);
  65 int btrfs_clear_buffer_defrag(struct extent_buffer *buf);
  66 int btrfs_clear_buffer_defrag_done(struct extent_buffer *buf);
  67 int btrfs_read_buffer(struct extent_buffer *buf);
  68 u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len);
  69 void btrfs_csum_final(u32 crc, char *result);
  70 void btrfs_throttle(struct btrfs_root *root);
  71 int btrfs_open_device(struct btrfs_device *dev);
  72 int btrfs_verify_block_csum(struct btrfs_root *root,
  73                             struct extent_buffer *buf);
  74 int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
  75                         int metadata);
  76 #endif