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 #define BTRFS_SUPER_INFO_SIZE 4096
  24 struct btrfs_device;
  25 struct btrfs_fs_devices;
  26
  27 struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
  28                                       u32 blocksize, u64 parent_transid);
  29 int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize,
  30                          u64 parent_transid);
  31 struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
  32                                                    u64 bytenr, u32 blocksize);
  33 int clean_tree_block(struct btrfs_trans_handle *trans,
  34                      struct btrfs_root *root, struct extent_buffer *buf);
  35 struct btrfs_root *open_ctree(struct super_block *sb,
  36                               struct btrfs_fs_devices *fs_devices,
  37                               char *options);
  38 int close_ctree(struct btrfs_root *root);
  39 int write_ctree_super(struct btrfs_trans_handle *trans,
  40                       struct btrfs_root *root);
  41 struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
  42                                             u64 bytenr, u32 blocksize);
  43 struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info,
  44                                         u64 root_objectid);
  45 struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
  46                                       struct btrfs_key *location,
  47                                       const char *name, int namelen);
  48 struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root,
  49                                                struct btrfs_key *location);
  50 struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
  51                                               struct btrfs_key *location);
  52 int btrfs_insert_dev_radix(struct btrfs_root *root,
  53                            struct block_device *bdev,
  54                            u64 device_id,
  55                            u64 block_start,
  56                            u64 num_blocks);
  57 void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr);
  58 int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);
  59 void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
  60 int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid);
  61 int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
  62 int wait_on_tree_block_writeback(struct btrfs_root *root,
  63                                  struct extent_buffer *buf);
  64 int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid);
  65 u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len);
  66 void btrfs_csum_final(u32 crc, char *result);
  67 int btrfs_open_device(struct btrfs_device *dev);
  68 int btrfs_verify_block_csum(struct btrfs_root *root,
  69                             struct extent_buffer *buf);
  70 int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
  71                         int metadata);
  72 int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,
  73                         int rw, struct bio *bio, int mirror_num,
  74                         extent_submit_bio_hook_t *submit_bio_hook);
  75 int btrfs_congested_async(struct btrfs_fs_info *info, int iodone);
  76 unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info);
  77 int btrfs_write_tree_block(struct extent_buffer *buf);
  78 int btrfs_wait_tree_block_writeback(struct extent_buffer *buf);
  79 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
  80                              struct btrfs_fs_info *fs_info);
  81 int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
  82                              struct btrfs_fs_info *fs_info);
  83 int btree_lock_page_hook(struct page *page);
  84 #endif