2 * Copyright (C) 2007 Oracle. All rights reserved.
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.
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.
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.
22 #include "extent_map.h"
23 #include "extent_io.h"
24 #include "ordered-data.h"
26 /* in memory btrfs inode */
28 /* which subvolume this inode belongs to */
29 struct btrfs_root *root;
31 /* the block group preferred for allocations. This pointer is buggy
32 * and needs to be replaced with a bytenr instead
34 struct btrfs_block_group_cache *block_group;
36 /* key used to find this inode on disk. This is used by the code
37 * to read in roots of subvolumes
39 struct btrfs_key location;
41 /* the extent_tree has caches of all the extent mappings to disk */
42 struct extent_map_tree extent_tree;
44 /* the io_tree does range state (DIRTY, LOCKED etc) */
45 struct extent_io_tree io_tree;
47 /* special utility tree used to record which mirrors have already been
48 * tried when checksums fail for a given block
50 struct extent_io_tree io_failure_tree;
52 /* held while inserting checksums to avoid races */
53 struct mutex csum_mutex;
55 /* held while inesrting or deleting extents from files */
56 struct mutex extent_mutex;
58 /* held while logging the inode in tree-log.c */
59 struct mutex log_mutex;
61 /* used to order data wrt metadata */
62 struct btrfs_ordered_inode_tree ordered_tree;
64 /* standard acl pointers */
65 struct posix_acl *i_acl;
66 struct posix_acl *i_default_acl;
68 /* for keeping track of orphaned inodes */
69 struct list_head i_orphan;
71 /* list of all the delalloc inodes in the FS. There are times we need
72 * to write all the delalloc pages to disk, and this list is used
75 struct list_head delalloc_inodes;
77 /* full 64 bit generation number, struct vfs_inode doesn't have a big
78 * enough field for this.
83 * transid of the trans_handle that last modified this inode
87 * transid that last logged this inode
92 * trans that last made a change that should be fully fsync'd. This
93 * gets reset to zero each time the inode is logged
97 /* total number of bytes pending delalloc, used by stat to calc the
98 * real block usage of the file
103 * the size of the file stored in the metadata on disk. data=ordered
104 * means the in-memory i_size might be larger than the size on disk
105 * because not all the blocks are written yet.
109 /* flags field from the on disk inode */
113 * if this is a directory then index_cnt is the counter for the index
114 * number for new files that are created
118 struct inode vfs_inode;
121 static inline struct btrfs_inode *BTRFS_I(struct inode *inode)
123 return container_of(inode, struct btrfs_inode, vfs_inode);
126 static inline void btrfs_i_size_write(struct inode *inode, u64 size)
128 inode->i_size = size;
129 BTRFS_I(inode)->disk_i_size = size;