fs/btrfs/btrfs_inode.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 __BTRFS_I__
  20 #define __BTRFS_I__
  21
  22 #include "extent_map.h"
  23 #include "extent_io.h"
  24 #include "ordered-data.h"
  25
  26 /* in memory btrfs inode */
  27 struct btrfs_inode {
  28         struct btrfs_root *root;
  29         struct btrfs_block_group_cache *block_group;
  30         struct btrfs_key location;
  31         struct extent_map_tree extent_tree;
  32         struct extent_io_tree io_tree;
  33         struct extent_io_tree io_failure_tree;
  34         struct mutex csum_mutex;
  35         struct mutex extent_mutex;
  36         struct inode vfs_inode;
  37         struct btrfs_ordered_inode_tree ordered_tree;
  38
  39         /*
  40          * transid of the trans_handle that last modified this inode
  41          */
  42         u64 last_trans;
  43         u64 delalloc_bytes;
  44         u64 disk_i_size;
  45         u32 flags;
  46
  47         /*
  48          * if this is a directory then index_cnt is the counter for the index
  49          * number for new files that are created
  50          */
  51         u64 index_cnt;
  52
  53         /*
  54          * index holds the directory index for this inode on creation, so
  55          * add_link can do what its supposed to.  This isn't populated when the
  56          * inode is read because there isn't really a reason to know this unless
  57          * we are creating the directory index or deleting it, and deletion
  58          * reads the index off of the inode reference at unlink time.
  59          */
  60         u64 index;
  61 };
  62
  63 static inline struct btrfs_inode *BTRFS_I(struct inode *inode)
  64 {
  65         return container_of(inode, struct btrfs_inode, vfs_inode);
  66 }
  67
  68 static inline void btrfs_i_size_write(struct inode *inode, u64 size)
  69 {
  70         inode->i_size = size;
  71         BTRFS_I(inode)->disk_i_size = size;
  72 }
  73
  74
  75 #endif