disk-io.h 3.4 KB

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  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. #ifndef __DISKIO__
  19. #define __DISKIO__
  20. #define BTRFS_SUPER_INFO_OFFSET (16 * 1024)
  21. #define BTRFS_SUPER_INFO_SIZE 4096
  22. struct btrfs_device;
  23. struct btrfs_fs_devices;
  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. struct btrfs_fs_devices *fs_devices);
  33. int close_ctree(struct btrfs_root *root);
  34. int write_ctree_super(struct btrfs_trans_handle *trans,
  35. struct btrfs_root *root);
  36. struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
  37. u64 bytenr, u32 blocksize);
  38. struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info,
  39. u64 root_objectid);
  40. struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
  41. struct btrfs_key *location,
  42. const char *name, int namelen);
  43. struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info,
  44. struct btrfs_key *location);
  45. struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
  46. struct btrfs_key *location);
  47. int btrfs_insert_dev_radix(struct btrfs_root *root,
  48. struct block_device *bdev,
  49. u64 device_id,
  50. u64 block_start,
  51. u64 num_blocks);
  52. void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr);
  53. int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);
  54. void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
  55. int btrfs_buffer_uptodate(struct extent_buffer *buf);
  56. int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
  57. int wait_on_tree_block_writeback(struct btrfs_root *root,
  58. struct extent_buffer *buf);
  59. void btrfs_set_buffer_defrag(struct extent_buffer *buf);
  60. void btrfs_set_buffer_defrag_done(struct extent_buffer *buf);
  61. int btrfs_buffer_defrag(struct extent_buffer *buf);
  62. int btrfs_buffer_defrag_done(struct extent_buffer *buf);
  63. int btrfs_clear_buffer_defrag(struct extent_buffer *buf);
  64. int btrfs_clear_buffer_defrag_done(struct extent_buffer *buf);
  65. int btrfs_read_buffer(struct extent_buffer *buf);
  66. u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len);
  67. void btrfs_csum_final(u32 crc, char *result);
  68. void btrfs_throttle(struct btrfs_root *root);
  69. int btrfs_open_device(struct btrfs_device *dev);
  70. int btrfs_verify_block_csum(struct btrfs_root *root,
  71. struct extent_buffer *buf);
  72. int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
  73. int metadata);
  74. #endif