Chris Mason | 6cbd557 | 2007-06-12 09:07:21 -0400 | [diff] [blame] | 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 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 19 | #ifndef __BTRFS_I__ |
| 20 | #define __BTRFS_I__ |
| 21 | |
Chris Mason | a52d9a8 | 2007-08-27 16:49:44 -0400 | [diff] [blame] | 22 | #include "extent_map.h" |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 23 | #include "extent_io.h" |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 24 | #include "ordered-data.h" |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 25 | #include "delayed-inode.h" |
Chris Mason | a52d9a8 | 2007-08-27 16:49:44 -0400 | [diff] [blame] | 26 | |
Josef Bacik | 72ac3c0 | 2012-05-23 14:13:11 -0400 | [diff] [blame] | 27 | /* |
| 28 | * ordered_data_close is set by truncate when a file that used |
| 29 | * to have good data has been truncated to zero. When it is set |
| 30 | * the btrfs file release call will add this inode to the |
| 31 | * ordered operations list so that we make sure to flush out any |
| 32 | * new data the application may have written before commit. |
| 33 | */ |
| 34 | #define BTRFS_INODE_ORDERED_DATA_CLOSE 0 |
| 35 | #define BTRFS_INODE_ORPHAN_META_RESERVED 1 |
| 36 | #define BTRFS_INODE_DUMMY 2 |
| 37 | #define BTRFS_INODE_IN_DEFRAG 3 |
| 38 | #define BTRFS_INODE_DELALLOC_META_RESERVED 4 |
Josef Bacik | 8a35d95 | 2012-05-23 14:26:42 -0400 | [diff] [blame] | 39 | #define BTRFS_INODE_HAS_ORPHAN_ITEM 5 |
Josef Bacik | 7ddf5a4 | 2012-06-08 15:26:47 -0400 | [diff] [blame] | 40 | #define BTRFS_INODE_HAS_ASYNC_EXTENT 6 |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 41 | #define BTRFS_INODE_NEEDS_FULL_SYNC 7 |
Josef Bacik | e997615 | 2012-10-11 15:53:56 -0400 | [diff] [blame] | 42 | #define BTRFS_INODE_COPY_EVERYTHING 8 |
Miao Xie | df0af1a | 2013-01-29 10:11:59 +0000 | [diff] [blame] | 43 | #define BTRFS_INODE_IN_DELALLOC_LIST 9 |
Miao Xie | 2e60a51 | 2013-02-08 07:01:08 +0000 | [diff] [blame] | 44 | #define BTRFS_INODE_READDIO_NEED_LOCK 10 |
Josef Bacik | 72ac3c0 | 2012-05-23 14:13:11 -0400 | [diff] [blame] | 45 | |
Aneesh | f1ace24 | 2007-06-13 16:18:26 -0400 | [diff] [blame] | 46 | /* in memory btrfs inode */ |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 47 | struct btrfs_inode { |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 48 | /* which subvolume this inode belongs to */ |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 49 | struct btrfs_root *root; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 50 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 51 | /* key used to find this inode on disk. This is used by the code |
| 52 | * to read in roots of subvolumes |
| 53 | */ |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 54 | struct btrfs_key location; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 55 | |
Josef Bacik | 9e0baf6 | 2011-07-15 15:16:44 +0000 | [diff] [blame] | 56 | /* Lock for counters */ |
| 57 | spinlock_t lock; |
| 58 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 59 | /* the extent_tree has caches of all the extent mappings to disk */ |
Chris Mason | a52d9a8 | 2007-08-27 16:49:44 -0400 | [diff] [blame] | 60 | struct extent_map_tree extent_tree; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 61 | |
| 62 | /* the io_tree does range state (DIRTY, LOCKED etc) */ |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 63 | struct extent_io_tree io_tree; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 64 | |
| 65 | /* special utility tree used to record which mirrors have already been |
| 66 | * tried when checksums fail for a given block |
| 67 | */ |
Chris Mason | 7e38326 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 68 | struct extent_io_tree io_failure_tree; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 69 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 70 | /* held while logging the inode in tree-log.c */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 71 | struct mutex log_mutex; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 72 | |
Josef Bacik | f248679 | 2012-01-13 12:09:22 -0500 | [diff] [blame] | 73 | /* held while doing delalloc reservations */ |
| 74 | struct mutex delalloc_mutex; |
| 75 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 76 | /* used to order data wrt metadata */ |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 77 | struct btrfs_ordered_inode_tree ordered_tree; |
Josef Bacik | 15ee9bc | 2007-08-10 16:22:09 -0400 | [diff] [blame] | 78 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 79 | /* list of all the delalloc inodes in the FS. There are times we need |
| 80 | * to write all the delalloc pages to disk, and this list is used |
| 81 | * to walk them all. |
| 82 | */ |
Chris Mason | ea8c281 | 2008-08-04 23:17:27 -0400 | [diff] [blame] | 83 | struct list_head delalloc_inodes; |
| 84 | |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 85 | /* |
| 86 | * list for tracking inodes that must be sent to disk before a |
| 87 | * rename or truncate commit |
| 88 | */ |
| 89 | struct list_head ordered_operations; |
| 90 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 91 | /* node for the red-black tree that links inodes in subvolume root */ |
| 92 | struct rb_node rb_node; |
| 93 | |
Josef Bacik | 72ac3c0 | 2012-05-23 14:13:11 -0400 | [diff] [blame] | 94 | unsigned long runtime_flags; |
| 95 | |
Josef Bacik | b812ce2 | 2012-11-16 13:56:32 -0500 | [diff] [blame] | 96 | /* Keep track of who's O_SYNC/fsycing currently */ |
| 97 | atomic_t sync_writers; |
| 98 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 99 | /* full 64 bit generation number, struct vfs_inode doesn't have a big |
| 100 | * enough field for this. |
| 101 | */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 102 | u64 generation; |
| 103 | |
Josef Bacik | 15ee9bc | 2007-08-10 16:22:09 -0400 | [diff] [blame] | 104 | /* |
| 105 | * transid of the trans_handle that last modified this inode |
| 106 | */ |
| 107 | u64 last_trans; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 108 | |
| 109 | /* |
| 110 | * log transid when this inode was last modified |
| 111 | */ |
| 112 | u64 last_sub_trans; |
| 113 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 114 | /* |
| 115 | * transid that last logged this inode |
| 116 | */ |
| 117 | u64 logged_trans; |
Chris Mason | 49eb7e4 | 2008-09-11 15:53:12 -0400 | [diff] [blame] | 118 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 119 | /* total number of bytes pending delalloc, used by stat to calc the |
| 120 | * real block usage of the file |
| 121 | */ |
Chris Mason | 9069218 | 2008-02-08 13:49:28 -0500 | [diff] [blame] | 122 | u64 delalloc_bytes; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 123 | |
| 124 | /* |
| 125 | * the size of the file stored in the metadata on disk. data=ordered |
| 126 | * means the in-memory i_size might be larger than the size on disk |
| 127 | * because not all the blocks are written yet. |
| 128 | */ |
Chris Mason | dbe674a | 2008-07-17 12:54:05 -0400 | [diff] [blame] | 129 | u64 disk_i_size; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 130 | |
Josef Bacik | aec7477 | 2008-07-24 12:12:38 -0400 | [diff] [blame] | 131 | /* |
| 132 | * if this is a directory then index_cnt is the counter for the index |
| 133 | * number for new files that are created |
| 134 | */ |
| 135 | u64 index_cnt; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 136 | |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 137 | /* the fsync log has some corner cases that mean we have to check |
| 138 | * directories to see if any unlinks have been done before |
| 139 | * the directory was logged. See tree-log.c for all the |
| 140 | * details |
| 141 | */ |
| 142 | u64 last_unlink_trans; |
| 143 | |
Josef Bacik | 7709cde | 2011-08-04 10:25:02 -0400 | [diff] [blame] | 144 | /* |
| 145 | * Number of bytes outstanding that are going to need csums. This is |
| 146 | * used in ENOSPC accounting. |
| 147 | */ |
| 148 | u64 csum_bytes; |
| 149 | |
Josef Bacik | f1bdcc0 | 2011-07-14 14:28:08 -0400 | [diff] [blame] | 150 | /* flags field from the on disk inode */ |
| 151 | u32 flags; |
| 152 | |
Liu Bo | 46d8bc3 | 2012-08-29 01:07:55 -0600 | [diff] [blame] | 153 | /* a local copy of root's last_log_commit */ |
| 154 | unsigned long last_log_commit; |
| 155 | |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 156 | /* |
Josef Bacik | 32c00af | 2009-10-08 13:34:05 -0400 | [diff] [blame] | 157 | * Counters to keep track of the number of extent item's we may use due |
| 158 | * to delalloc and such. outstanding_extents is the number of extent |
| 159 | * items we think we'll end up using, and reserved_extents is the number |
| 160 | * of extent items we've reserved metadata for. |
Josef Bacik | 9ed74f2 | 2009-09-11 16:12:44 -0400 | [diff] [blame] | 161 | */ |
Josef Bacik | 9e0baf6 | 2011-07-15 15:16:44 +0000 | [diff] [blame] | 162 | unsigned outstanding_extents; |
| 163 | unsigned reserved_extents; |
Josef Bacik | 9ed74f2 | 2009-09-11 16:12:44 -0400 | [diff] [blame] | 164 | |
| 165 | /* |
Chris Mason | 1e701a3 | 2010-03-11 09:42:04 -0500 | [diff] [blame] | 166 | * always compress this one file |
| 167 | */ |
Josef Bacik | 72ac3c0 | 2012-05-23 14:13:11 -0400 | [diff] [blame] | 168 | unsigned force_compress; |
Chris Mason | 1e701a3 | 2010-03-11 09:42:04 -0500 | [diff] [blame] | 169 | |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 170 | struct btrfs_delayed_node *delayed_node; |
| 171 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 172 | struct inode vfs_inode; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 173 | }; |
Chris Mason | dbe674a | 2008-07-17 12:54:05 -0400 | [diff] [blame] | 174 | |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 175 | extern unsigned char btrfs_filetype_table[]; |
| 176 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 177 | static inline struct btrfs_inode *BTRFS_I(struct inode *inode) |
| 178 | { |
| 179 | return container_of(inode, struct btrfs_inode, vfs_inode); |
| 180 | } |
| 181 | |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 182 | static inline u64 btrfs_ino(struct inode *inode) |
| 183 | { |
| 184 | u64 ino = BTRFS_I(inode)->location.objectid; |
| 185 | |
Liu Bo | 14c7cca | 2011-09-11 10:52:24 -0400 | [diff] [blame] | 186 | /* |
| 187 | * !ino: btree_inode |
| 188 | * type == BTRFS_ROOT_ITEM_KEY: subvol dir |
| 189 | */ |
| 190 | if (!ino || BTRFS_I(inode)->location.type == BTRFS_ROOT_ITEM_KEY) |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 191 | ino = inode->i_ino; |
| 192 | return ino; |
| 193 | } |
| 194 | |
Chris Mason | dbe674a | 2008-07-17 12:54:05 -0400 | [diff] [blame] | 195 | static inline void btrfs_i_size_write(struct inode *inode, u64 size) |
| 196 | { |
Yan, Zheng | c216775 | 2009-11-12 09:34:21 +0000 | [diff] [blame] | 197 | i_size_write(inode, size); |
Chris Mason | dbe674a | 2008-07-17 12:54:05 -0400 | [diff] [blame] | 198 | BTRFS_I(inode)->disk_i_size = size; |
| 199 | } |
| 200 | |
Liu Bo | 83eea1f | 2012-07-10 05:28:39 -0600 | [diff] [blame] | 201 | static inline bool btrfs_is_free_space_inode(struct inode *inode) |
Chris Mason | 2cf8572 | 2011-07-26 15:35:09 -0400 | [diff] [blame] | 202 | { |
Liu Bo | 83eea1f | 2012-07-10 05:28:39 -0600 | [diff] [blame] | 203 | struct btrfs_root *root = BTRFS_I(inode)->root; |
| 204 | |
Liu Bo | 51a8cf9 | 2012-07-10 05:28:38 -0600 | [diff] [blame] | 205 | if (root == root->fs_info->tree_root && |
| 206 | btrfs_ino(inode) != BTRFS_BTREE_INODE_OBJECTID) |
| 207 | return true; |
| 208 | if (BTRFS_I(inode)->location.objectid == BTRFS_FREE_INO_OBJECTID) |
Chris Mason | 2cf8572 | 2011-07-26 15:35:09 -0400 | [diff] [blame] | 209 | return true; |
| 210 | return false; |
| 211 | } |
| 212 | |
Josef Bacik | 22ee698 | 2012-05-29 16:57:49 -0400 | [diff] [blame] | 213 | static inline int btrfs_inode_in_log(struct inode *inode, u64 generation) |
| 214 | { |
Josef Bacik | 22ee698 | 2012-05-29 16:57:49 -0400 | [diff] [blame] | 215 | if (BTRFS_I(inode)->logged_trans == generation && |
Liu Bo | 46d8bc3 | 2012-08-29 01:07:55 -0600 | [diff] [blame] | 216 | BTRFS_I(inode)->last_sub_trans <= BTRFS_I(inode)->last_log_commit) |
| 217 | return 1; |
| 218 | return 0; |
Josef Bacik | 22ee698 | 2012-05-29 16:57:49 -0400 | [diff] [blame] | 219 | } |
| 220 | |
Miao Xie | 2e60a51 | 2013-02-08 07:01:08 +0000 | [diff] [blame] | 221 | /* |
| 222 | * Disable DIO read nolock optimization, so new dio readers will be forced |
| 223 | * to grab i_mutex. It is used to avoid the endless truncate due to |
| 224 | * nonlocked dio read. |
| 225 | */ |
| 226 | static inline void btrfs_inode_block_unlocked_dio(struct inode *inode) |
| 227 | { |
| 228 | set_bit(BTRFS_INODE_READDIO_NEED_LOCK, &BTRFS_I(inode)->runtime_flags); |
| 229 | smp_mb(); |
| 230 | } |
| 231 | |
| 232 | static inline void btrfs_inode_resume_unlocked_dio(struct inode *inode) |
| 233 | { |
| 234 | smp_mb__before_clear_bit(); |
| 235 | clear_bit(BTRFS_INODE_READDIO_NEED_LOCK, |
| 236 | &BTRFS_I(inode)->runtime_flags); |
| 237 | } |
| 238 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 239 | #endif |