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Chris Mason6cbd5572007-06-12 09:07:21 -04001/*
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
Chris Mason2c90e5d2007-04-02 10:50:19 -040019#ifndef __BTRFS_I__
20#define __BTRFS_I__
21
Chris Masona52d9a82007-08-27 16:49:44 -040022#include "extent_map.h"
Chris Masond1310b22008-01-24 16:13:08 -050023#include "extent_io.h"
Chris Masone6dcd2d2008-07-17 12:53:50 -040024#include "ordered-data.h"
Miao Xie16cdcec2011-04-22 18:12:22 +080025#include "delayed-inode.h"
Chris Masona52d9a82007-08-27 16:49:44 -040026
Aneeshf1ace242007-06-13 16:18:26 -040027/* in memory btrfs inode */
Chris Mason2c90e5d2007-04-02 10:50:19 -040028struct btrfs_inode {
Chris Masond352ac62008-09-29 15:18:18 -040029 /* which subvolume this inode belongs to */
Chris Masond6e4a422007-04-06 15:37:36 -040030 struct btrfs_root *root;
Chris Masond352ac62008-09-29 15:18:18 -040031
Chris Masond352ac62008-09-29 15:18:18 -040032 /* key used to find this inode on disk. This is used by the code
33 * to read in roots of subvolumes
34 */
Chris Masond6e4a422007-04-06 15:37:36 -040035 struct btrfs_key location;
Chris Masond352ac62008-09-29 15:18:18 -040036
Josef Bacik9e0baf62011-07-15 15:16:44 +000037 /* Lock for counters */
38 spinlock_t lock;
39
Chris Masond352ac62008-09-29 15:18:18 -040040 /* the extent_tree has caches of all the extent mappings to disk */
Chris Masona52d9a82007-08-27 16:49:44 -040041 struct extent_map_tree extent_tree;
Chris Masond352ac62008-09-29 15:18:18 -040042
43 /* the io_tree does range state (DIRTY, LOCKED etc) */
Chris Masond1310b22008-01-24 16:13:08 -050044 struct extent_io_tree io_tree;
Chris Masond352ac62008-09-29 15:18:18 -040045
46 /* special utility tree used to record which mirrors have already been
47 * tried when checksums fail for a given block
48 */
Chris Mason7e383262008-04-09 16:28:12 -040049 struct extent_io_tree io_failure_tree;
Chris Masond352ac62008-09-29 15:18:18 -040050
Chris Masond352ac62008-09-29 15:18:18 -040051 /* held while logging the inode in tree-log.c */
Chris Masone02119d2008-09-05 16:13:11 -040052 struct mutex log_mutex;
Chris Masond352ac62008-09-29 15:18:18 -040053
Josef Bacikf2486792012-01-13 12:09:22 -050054 /* held while doing delalloc reservations */
55 struct mutex delalloc_mutex;
56
Chris Masond352ac62008-09-29 15:18:18 -040057 /* used to order data wrt metadata */
Chris Masone6dcd2d2008-07-17 12:53:50 -040058 struct btrfs_ordered_inode_tree ordered_tree;
Josef Bacik15ee9bc2007-08-10 16:22:09 -040059
Josef Bacik7b128762008-07-24 12:17:14 -040060 /* for keeping track of orphaned inodes */
61 struct list_head i_orphan;
62
Chris Masond352ac62008-09-29 15:18:18 -040063 /* list of all the delalloc inodes in the FS. There are times we need
64 * to write all the delalloc pages to disk, and this list is used
65 * to walk them all.
66 */
Chris Masonea8c2812008-08-04 23:17:27 -040067 struct list_head delalloc_inodes;
68
Chris Mason5a3f23d2009-03-31 13:27:11 -040069 /*
70 * list for tracking inodes that must be sent to disk before a
71 * rename or truncate commit
72 */
73 struct list_head ordered_operations;
74
Yan Zheng5d4f98a2009-06-10 10:45:14 -040075 /* node for the red-black tree that links inodes in subvolume root */
76 struct rb_node rb_node;
77
Josef Bacik6a632092009-02-20 11:00:09 -050078 /* the space_info for where this inode's data allocations are done */
79 struct btrfs_space_info *space_info;
80
Chris Masond352ac62008-09-29 15:18:18 -040081 /* full 64 bit generation number, struct vfs_inode doesn't have a big
82 * enough field for this.
83 */
Chris Masone02119d2008-09-05 16:13:11 -040084 u64 generation;
85
Chris Masonc3027eb2008-12-08 16:40:21 -050086 /* sequence number for NFS changes */
87 u64 sequence;
88
Josef Bacik15ee9bc2007-08-10 16:22:09 -040089 /*
90 * transid of the trans_handle that last modified this inode
91 */
92 u64 last_trans;
Chris Mason257c62e2009-10-13 13:21:08 -040093
94 /*
95 * log transid when this inode was last modified
96 */
97 u64 last_sub_trans;
98
Chris Masone02119d2008-09-05 16:13:11 -040099 /*
100 * transid that last logged this inode
101 */
102 u64 logged_trans;
Chris Mason49eb7e42008-09-11 15:53:12 -0400103
Chris Masond352ac62008-09-29 15:18:18 -0400104 /* total number of bytes pending delalloc, used by stat to calc the
105 * real block usage of the file
106 */
Chris Mason90692182008-02-08 13:49:28 -0500107 u64 delalloc_bytes;
Chris Masond352ac62008-09-29 15:18:18 -0400108
109 /*
110 * the size of the file stored in the metadata on disk. data=ordered
111 * means the in-memory i_size might be larger than the size on disk
112 * because not all the blocks are written yet.
113 */
Chris Masondbe674a2008-07-17 12:54:05 -0400114 u64 disk_i_size;
Chris Masond352ac62008-09-29 15:18:18 -0400115
Josef Bacikaec74772008-07-24 12:12:38 -0400116 /*
117 * if this is a directory then index_cnt is the counter for the index
118 * number for new files that are created
119 */
120 u64 index_cnt;
Chris Masond352ac62008-09-29 15:18:18 -0400121
Chris Mason12fcfd22009-03-24 10:24:20 -0400122 /* the fsync log has some corner cases that mean we have to check
123 * directories to see if any unlinks have been done before
124 * the directory was logged. See tree-log.c for all the
125 * details
126 */
127 u64 last_unlink_trans;
128
Josef Bacik7709cde2011-08-04 10:25:02 -0400129 /*
130 * Number of bytes outstanding that are going to need csums. This is
131 * used in ENOSPC accounting.
132 */
133 u64 csum_bytes;
134
Josef Bacikf1bdcc02011-07-14 14:28:08 -0400135 /* flags field from the on disk inode */
136 u32 flags;
137
Chris Mason5a3f23d2009-03-31 13:27:11 -0400138 /*
Josef Bacik32c00af2009-10-08 13:34:05 -0400139 * Counters to keep track of the number of extent item's we may use due
140 * to delalloc and such. outstanding_extents is the number of extent
141 * items we think we'll end up using, and reserved_extents is the number
142 * of extent items we've reserved metadata for.
Josef Bacik9ed74f22009-09-11 16:12:44 -0400143 */
Josef Bacik9e0baf62011-07-15 15:16:44 +0000144 unsigned outstanding_extents;
145 unsigned reserved_extents;
Josef Bacik9ed74f22009-09-11 16:12:44 -0400146
147 /*
Chris Mason5a3f23d2009-03-31 13:27:11 -0400148 * ordered_data_close is set by truncate when a file that used
149 * to have good data has been truncated to zero. When it is set
150 * the btrfs file release call will add this inode to the
151 * ordered operations list so that we make sure to flush out any
152 * new data the application may have written before commit.
Chris Mason5a3f23d2009-03-31 13:27:11 -0400153 */
154 unsigned ordered_data_close:1;
Yan, Zhengd68fc572010-05-16 10:49:58 -0400155 unsigned orphan_meta_reserved:1;
Yan, Zheng4df27c4d2009-09-21 15:56:00 -0400156 unsigned dummy_inode:1;
Chris Mason4cb53002011-05-24 15:35:30 -0400157 unsigned in_defrag:1;
Josef Bacik7fd2ae22011-11-08 15:47:34 -0500158 unsigned delalloc_meta_reserved:1;
Chris Mason5a3f23d2009-03-31 13:27:11 -0400159
Chris Mason1e701a32010-03-11 09:42:04 -0500160 /*
161 * always compress this one file
162 */
Li Zefan261507a02010-12-17 14:21:50 +0800163 unsigned force_compress:4;
Chris Mason1e701a32010-03-11 09:42:04 -0500164
Miao Xie16cdcec2011-04-22 18:12:22 +0800165 struct btrfs_delayed_node *delayed_node;
166
Chris Masond352ac62008-09-29 15:18:18 -0400167 struct inode vfs_inode;
Chris Mason2c90e5d2007-04-02 10:50:19 -0400168};
Chris Masondbe674a2008-07-17 12:54:05 -0400169
Miao Xie16cdcec2011-04-22 18:12:22 +0800170extern unsigned char btrfs_filetype_table[];
171
Chris Mason2c90e5d2007-04-02 10:50:19 -0400172static inline struct btrfs_inode *BTRFS_I(struct inode *inode)
173{
174 return container_of(inode, struct btrfs_inode, vfs_inode);
175}
176
Li Zefan33345d012011-04-20 10:31:50 +0800177static inline u64 btrfs_ino(struct inode *inode)
178{
179 u64 ino = BTRFS_I(inode)->location.objectid;
180
Liu Bo14c7cca2011-09-11 10:52:24 -0400181 /*
182 * !ino: btree_inode
183 * type == BTRFS_ROOT_ITEM_KEY: subvol dir
184 */
185 if (!ino || BTRFS_I(inode)->location.type == BTRFS_ROOT_ITEM_KEY)
Li Zefan33345d012011-04-20 10:31:50 +0800186 ino = inode->i_ino;
187 return ino;
188}
189
Chris Masondbe674a2008-07-17 12:54:05 -0400190static inline void btrfs_i_size_write(struct inode *inode, u64 size)
191{
Yan, Zhengc2167752009-11-12 09:34:21 +0000192 i_size_write(inode, size);
Chris Masondbe674a2008-07-17 12:54:05 -0400193 BTRFS_I(inode)->disk_i_size = size;
194}
195
Chris Mason2cf85722011-07-26 15:35:09 -0400196static inline bool btrfs_is_free_space_inode(struct btrfs_root *root,
197 struct inode *inode)
198{
199 if (root == root->fs_info->tree_root ||
200 BTRFS_I(inode)->location.objectid == BTRFS_FREE_INO_OBJECTID)
201 return true;
202 return false;
203}
204
Chris Mason2c90e5d2007-04-02 10:50:19 -0400205#endif