btrfs_inode.h 3.5 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133
  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 __BTRFS_I__
  19. #define __BTRFS_I__
  20. #include "extent_map.h"
  21. #include "extent_io.h"
  22. #include "ordered-data.h"
  23. /* in memory btrfs inode */
  24. struct btrfs_inode {
  25. /* which subvolume this inode belongs to */
  26. struct btrfs_root *root;
  27. /* the block group preferred for allocations. This pointer is buggy
  28. * and needs to be replaced with a bytenr instead
  29. */
  30. struct btrfs_block_group_cache *block_group;
  31. /* key used to find this inode on disk. This is used by the code
  32. * to read in roots of subvolumes
  33. */
  34. struct btrfs_key location;
  35. /* the extent_tree has caches of all the extent mappings to disk */
  36. struct extent_map_tree extent_tree;
  37. /* the io_tree does range state (DIRTY, LOCKED etc) */
  38. struct extent_io_tree io_tree;
  39. /* special utility tree used to record which mirrors have already been
  40. * tried when checksums fail for a given block
  41. */
  42. struct extent_io_tree io_failure_tree;
  43. /* held while inserting checksums to avoid races */
  44. struct mutex csum_mutex;
  45. /* held while inesrting or deleting extents from files */
  46. struct mutex extent_mutex;
  47. /* held while logging the inode in tree-log.c */
  48. struct mutex log_mutex;
  49. /* used to order data wrt metadata */
  50. struct btrfs_ordered_inode_tree ordered_tree;
  51. /* standard acl pointers */
  52. struct posix_acl *i_acl;
  53. struct posix_acl *i_default_acl;
  54. /* for keeping track of orphaned inodes */
  55. struct list_head i_orphan;
  56. /* list of all the delalloc inodes in the FS. There are times we need
  57. * to write all the delalloc pages to disk, and this list is used
  58. * to walk them all.
  59. */
  60. struct list_head delalloc_inodes;
  61. /* full 64 bit generation number, struct vfs_inode doesn't have a big
  62. * enough field for this.
  63. */
  64. u64 generation;
  65. /*
  66. * transid of the trans_handle that last modified this inode
  67. */
  68. u64 last_trans;
  69. /*
  70. * transid that last logged this inode
  71. */
  72. u64 logged_trans;
  73. /*
  74. * trans that last made a change that should be fully fsync'd. This
  75. * gets reset to zero each time the inode is logged
  76. */
  77. u64 log_dirty_trans;
  78. /* total number of bytes pending delalloc, used by stat to calc the
  79. * real block usage of the file
  80. */
  81. u64 delalloc_bytes;
  82. /*
  83. * the size of the file stored in the metadata on disk. data=ordered
  84. * means the in-memory i_size might be larger than the size on disk
  85. * because not all the blocks are written yet.
  86. */
  87. u64 disk_i_size;
  88. /* flags field from the on disk inode */
  89. u32 flags;
  90. /*
  91. * if this is a directory then index_cnt is the counter for the index
  92. * number for new files that are created
  93. */
  94. u64 index_cnt;
  95. struct inode vfs_inode;
  96. };
  97. static inline struct btrfs_inode *BTRFS_I(struct inode *inode)
  98. {
  99. return container_of(inode, struct btrfs_inode, vfs_inode);
  100. }
  101. static inline void btrfs_i_size_write(struct inode *inode, u64 size)
  102. {
  103. inode->i_size = size;
  104. BTRFS_I(inode)->disk_i_size = size;
  105. }
  106. #endif