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 | |
Filipe David Borba Manana | 778ba82 | 2013-10-06 22:22:33 +0100 | [diff] [blame] | 22 | #include <linux/hash.h> |
Chris Mason | a52d9a8 | 2007-08-27 16:49:44 -0400 | [diff] [blame] | 23 | #include "extent_map.h" |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 24 | #include "extent_io.h" |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 25 | #include "ordered-data.h" |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 26 | #include "delayed-inode.h" |
Chris Mason | a52d9a8 | 2007-08-27 16:49:44 -0400 | [diff] [blame] | 27 | |
Josef Bacik | 72ac3c0 | 2012-05-23 14:13:11 -0400 | [diff] [blame] | 28 | /* |
| 29 | * ordered_data_close is set by truncate when a file that used |
| 30 | * to have good data has been truncated to zero. When it is set |
| 31 | * the btrfs file release call will add this inode to the |
| 32 | * ordered operations list so that we make sure to flush out any |
| 33 | * new data the application may have written before commit. |
| 34 | */ |
| 35 | #define BTRFS_INODE_ORDERED_DATA_CLOSE 0 |
| 36 | #define BTRFS_INODE_ORPHAN_META_RESERVED 1 |
| 37 | #define BTRFS_INODE_DUMMY 2 |
| 38 | #define BTRFS_INODE_IN_DEFRAG 3 |
| 39 | #define BTRFS_INODE_DELALLOC_META_RESERVED 4 |
Josef Bacik | 8a35d95 | 2012-05-23 14:26:42 -0400 | [diff] [blame] | 40 | #define BTRFS_INODE_HAS_ORPHAN_ITEM 5 |
Josef Bacik | 7ddf5a4 | 2012-06-08 15:26:47 -0400 | [diff] [blame] | 41 | #define BTRFS_INODE_HAS_ASYNC_EXTENT 6 |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 42 | #define BTRFS_INODE_NEEDS_FULL_SYNC 7 |
Josef Bacik | e997615 | 2012-10-11 15:53:56 -0400 | [diff] [blame] | 43 | #define BTRFS_INODE_COPY_EVERYTHING 8 |
Miao Xie | df0af1a | 2013-01-29 10:11:59 +0000 | [diff] [blame] | 44 | #define BTRFS_INODE_IN_DELALLOC_LIST 9 |
Miao Xie | 2e60a51 | 2013-02-08 07:01:08 +0000 | [diff] [blame] | 45 | #define BTRFS_INODE_READDIO_NEED_LOCK 10 |
Filipe David Borba Manana | 6354192 | 2014-01-07 11:47:46 +0000 | [diff] [blame] | 46 | #define BTRFS_INODE_HAS_PROPS 11 |
Liu Bo | ddba1bf | 2015-06-17 16:59:58 +0800 | [diff] [blame^] | 47 | /* DIO is ready to submit */ |
| 48 | #define BTRFS_INODE_DIO_READY 12 |
Filipe Manana | 656f30d | 2014-09-26 12:25:56 +0100 | [diff] [blame] | 49 | /* |
| 50 | * The following 3 bits are meant only for the btree inode. |
| 51 | * When any of them is set, it means an error happened while writing an |
| 52 | * extent buffer belonging to: |
| 53 | * 1) a non-log btree |
| 54 | * 2) a log btree and first log sub-transaction |
| 55 | * 3) a log btree and second log sub-transaction |
| 56 | */ |
| 57 | #define BTRFS_INODE_BTREE_ERR 12 |
| 58 | #define BTRFS_INODE_BTREE_LOG1_ERR 13 |
| 59 | #define BTRFS_INODE_BTREE_LOG2_ERR 14 |
Josef Bacik | 72ac3c0 | 2012-05-23 14:13:11 -0400 | [diff] [blame] | 60 | |
Aneesh | f1ace24 | 2007-06-13 16:18:26 -0400 | [diff] [blame] | 61 | /* in memory btrfs inode */ |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 62 | struct btrfs_inode { |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 63 | /* which subvolume this inode belongs to */ |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 64 | struct btrfs_root *root; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 65 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 66 | /* key used to find this inode on disk. This is used by the code |
| 67 | * to read in roots of subvolumes |
| 68 | */ |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 69 | struct btrfs_key location; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 70 | |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 71 | /* |
| 72 | * Lock for counters and all fields used to determine if the inode is in |
| 73 | * the log or not (last_trans, last_sub_trans, last_log_commit, |
| 74 | * logged_trans). |
| 75 | */ |
Josef Bacik | 9e0baf6 | 2011-07-15 15:16:44 +0000 | [diff] [blame] | 76 | spinlock_t lock; |
| 77 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 78 | /* the extent_tree has caches of all the extent mappings to disk */ |
Chris Mason | a52d9a8 | 2007-08-27 16:49:44 -0400 | [diff] [blame] | 79 | struct extent_map_tree extent_tree; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 80 | |
| 81 | /* the io_tree does range state (DIRTY, LOCKED etc) */ |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 82 | struct extent_io_tree io_tree; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 83 | |
| 84 | /* special utility tree used to record which mirrors have already been |
| 85 | * tried when checksums fail for a given block |
| 86 | */ |
Chris Mason | 7e38326 | 2008-04-09 16:28:12 -0400 | [diff] [blame] | 87 | struct extent_io_tree io_failure_tree; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 88 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 89 | /* held while logging the inode in tree-log.c */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 90 | struct mutex log_mutex; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 91 | |
Josef Bacik | f248679 | 2012-01-13 12:09:22 -0500 | [diff] [blame] | 92 | /* held while doing delalloc reservations */ |
| 93 | struct mutex delalloc_mutex; |
| 94 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 95 | /* used to order data wrt metadata */ |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame] | 96 | struct btrfs_ordered_inode_tree ordered_tree; |
Josef Bacik | 15ee9bc | 2007-08-10 16:22:09 -0400 | [diff] [blame] | 97 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 98 | /* list of all the delalloc inodes in the FS. There are times we need |
| 99 | * to write all the delalloc pages to disk, and this list is used |
| 100 | * to walk them all. |
| 101 | */ |
Chris Mason | ea8c281 | 2008-08-04 23:17:27 -0400 | [diff] [blame] | 102 | struct list_head delalloc_inodes; |
| 103 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 104 | /* node for the red-black tree that links inodes in subvolume root */ |
| 105 | struct rb_node rb_node; |
| 106 | |
Josef Bacik | 72ac3c0 | 2012-05-23 14:13:11 -0400 | [diff] [blame] | 107 | unsigned long runtime_flags; |
| 108 | |
Nathaniel Yazdani | 9c931c5 | 2013-04-15 00:44:02 +0000 | [diff] [blame] | 109 | /* Keep track of who's O_SYNC/fsyncing currently */ |
Josef Bacik | b812ce2 | 2012-11-16 13:56:32 -0500 | [diff] [blame] | 110 | atomic_t sync_writers; |
| 111 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 112 | /* full 64 bit generation number, struct vfs_inode doesn't have a big |
| 113 | * enough field for this. |
| 114 | */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 115 | u64 generation; |
| 116 | |
Josef Bacik | 15ee9bc | 2007-08-10 16:22:09 -0400 | [diff] [blame] | 117 | /* |
| 118 | * transid of the trans_handle that last modified this inode |
| 119 | */ |
| 120 | u64 last_trans; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 121 | |
| 122 | /* |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 123 | * transid that last logged this inode |
| 124 | */ |
| 125 | u64 logged_trans; |
Chris Mason | 49eb7e4 | 2008-09-11 15:53:12 -0400 | [diff] [blame] | 126 | |
Miao Xie | bb14a59 | 2014-02-20 18:08:56 +0800 | [diff] [blame] | 127 | /* |
| 128 | * log transid when this inode was last modified |
| 129 | */ |
| 130 | int last_sub_trans; |
| 131 | |
| 132 | /* a local copy of root's last_log_commit */ |
| 133 | int last_log_commit; |
| 134 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 135 | /* total number of bytes pending delalloc, used by stat to calc the |
| 136 | * real block usage of the file |
| 137 | */ |
Chris Mason | 9069218 | 2008-02-08 13:49:28 -0500 | [diff] [blame] | 138 | u64 delalloc_bytes; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 139 | |
| 140 | /* |
Wang Shilong | 47059d9 | 2014-07-03 18:22:07 +0800 | [diff] [blame] | 141 | * total number of bytes pending defrag, used by stat to check whether |
| 142 | * it needs COW. |
| 143 | */ |
| 144 | u64 defrag_bytes; |
| 145 | |
| 146 | /* |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 147 | * the size of the file stored in the metadata on disk. data=ordered |
| 148 | * means the in-memory i_size might be larger than the size on disk |
| 149 | * because not all the blocks are written yet. |
| 150 | */ |
Chris Mason | dbe674a | 2008-07-17 12:54:05 -0400 | [diff] [blame] | 151 | u64 disk_i_size; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 152 | |
Josef Bacik | aec7477 | 2008-07-24 12:12:38 -0400 | [diff] [blame] | 153 | /* |
| 154 | * if this is a directory then index_cnt is the counter for the index |
| 155 | * number for new files that are created |
| 156 | */ |
| 157 | u64 index_cnt; |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 158 | |
Miao Xie | 67de117 | 2013-12-26 13:07:06 +0800 | [diff] [blame] | 159 | /* Cache the directory index number to speed the dir/file remove */ |
| 160 | u64 dir_index; |
| 161 | |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 162 | /* the fsync log has some corner cases that mean we have to check |
| 163 | * directories to see if any unlinks have been done before |
| 164 | * the directory was logged. See tree-log.c for all the |
| 165 | * details |
| 166 | */ |
| 167 | u64 last_unlink_trans; |
| 168 | |
Josef Bacik | 7709cde | 2011-08-04 10:25:02 -0400 | [diff] [blame] | 169 | /* |
| 170 | * Number of bytes outstanding that are going to need csums. This is |
| 171 | * used in ENOSPC accounting. |
| 172 | */ |
| 173 | u64 csum_bytes; |
| 174 | |
Josef Bacik | f1bdcc0 | 2011-07-14 14:28:08 -0400 | [diff] [blame] | 175 | /* flags field from the on disk inode */ |
| 176 | u32 flags; |
| 177 | |
Chris Mason | 5a3f23d | 2009-03-31 13:27:11 -0400 | [diff] [blame] | 178 | /* |
Josef Bacik | 32c00af | 2009-10-08 13:34:05 -0400 | [diff] [blame] | 179 | * Counters to keep track of the number of extent item's we may use due |
| 180 | * to delalloc and such. outstanding_extents is the number of extent |
| 181 | * items we think we'll end up using, and reserved_extents is the number |
| 182 | * of extent items we've reserved metadata for. |
Josef Bacik | 9ed74f2 | 2009-09-11 16:12:44 -0400 | [diff] [blame] | 183 | */ |
Josef Bacik | 9e0baf6 | 2011-07-15 15:16:44 +0000 | [diff] [blame] | 184 | unsigned outstanding_extents; |
| 185 | unsigned reserved_extents; |
Josef Bacik | 9ed74f2 | 2009-09-11 16:12:44 -0400 | [diff] [blame] | 186 | |
| 187 | /* |
Chris Mason | 1e701a3 | 2010-03-11 09:42:04 -0500 | [diff] [blame] | 188 | * always compress this one file |
| 189 | */ |
Josef Bacik | 72ac3c0 | 2012-05-23 14:13:11 -0400 | [diff] [blame] | 190 | unsigned force_compress; |
Chris Mason | 1e701a3 | 2010-03-11 09:42:04 -0500 | [diff] [blame] | 191 | |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 192 | struct btrfs_delayed_node *delayed_node; |
| 193 | |
chandan r | 9cc97d6 | 2012-07-04 12:48:07 +0530 | [diff] [blame] | 194 | /* File creation time. */ |
| 195 | struct timespec i_otime; |
| 196 | |
Chris Mason | d352ac6 | 2008-09-29 15:18:18 -0400 | [diff] [blame] | 197 | struct inode vfs_inode; |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 198 | }; |
Chris Mason | dbe674a | 2008-07-17 12:54:05 -0400 | [diff] [blame] | 199 | |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 200 | extern unsigned char btrfs_filetype_table[]; |
| 201 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 202 | static inline struct btrfs_inode *BTRFS_I(struct inode *inode) |
| 203 | { |
| 204 | return container_of(inode, struct btrfs_inode, vfs_inode); |
| 205 | } |
| 206 | |
Filipe David Borba Manana | 778ba82 | 2013-10-06 22:22:33 +0100 | [diff] [blame] | 207 | static inline unsigned long btrfs_inode_hash(u64 objectid, |
| 208 | const struct btrfs_root *root) |
| 209 | { |
| 210 | u64 h = objectid ^ (root->objectid * GOLDEN_RATIO_PRIME); |
| 211 | |
| 212 | #if BITS_PER_LONG == 32 |
| 213 | h = (h >> 32) ^ (h & 0xffffffff); |
| 214 | #endif |
| 215 | |
| 216 | return (unsigned long)h; |
| 217 | } |
| 218 | |
| 219 | static inline void btrfs_insert_inode_hash(struct inode *inode) |
| 220 | { |
| 221 | unsigned long h = btrfs_inode_hash(inode->i_ino, BTRFS_I(inode)->root); |
| 222 | |
| 223 | __insert_inode_hash(inode, h); |
| 224 | } |
| 225 | |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 226 | static inline u64 btrfs_ino(struct inode *inode) |
| 227 | { |
| 228 | u64 ino = BTRFS_I(inode)->location.objectid; |
| 229 | |
Liu Bo | 14c7cca | 2011-09-11 10:52:24 -0400 | [diff] [blame] | 230 | /* |
| 231 | * !ino: btree_inode |
| 232 | * type == BTRFS_ROOT_ITEM_KEY: subvol dir |
| 233 | */ |
| 234 | if (!ino || BTRFS_I(inode)->location.type == BTRFS_ROOT_ITEM_KEY) |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 235 | ino = inode->i_ino; |
| 236 | return ino; |
| 237 | } |
| 238 | |
Chris Mason | dbe674a | 2008-07-17 12:54:05 -0400 | [diff] [blame] | 239 | static inline void btrfs_i_size_write(struct inode *inode, u64 size) |
| 240 | { |
Yan, Zheng | c216775 | 2009-11-12 09:34:21 +0000 | [diff] [blame] | 241 | i_size_write(inode, size); |
Chris Mason | dbe674a | 2008-07-17 12:54:05 -0400 | [diff] [blame] | 242 | BTRFS_I(inode)->disk_i_size = size; |
| 243 | } |
| 244 | |
Liu Bo | 83eea1f | 2012-07-10 05:28:39 -0600 | [diff] [blame] | 245 | static inline bool btrfs_is_free_space_inode(struct inode *inode) |
Chris Mason | 2cf8572 | 2011-07-26 15:35:09 -0400 | [diff] [blame] | 246 | { |
Liu Bo | 83eea1f | 2012-07-10 05:28:39 -0600 | [diff] [blame] | 247 | struct btrfs_root *root = BTRFS_I(inode)->root; |
| 248 | |
Liu Bo | 51a8cf9 | 2012-07-10 05:28:38 -0600 | [diff] [blame] | 249 | if (root == root->fs_info->tree_root && |
| 250 | btrfs_ino(inode) != BTRFS_BTREE_INODE_OBJECTID) |
| 251 | return true; |
| 252 | if (BTRFS_I(inode)->location.objectid == BTRFS_FREE_INO_OBJECTID) |
Chris Mason | 2cf8572 | 2011-07-26 15:35:09 -0400 | [diff] [blame] | 253 | return true; |
| 254 | return false; |
| 255 | } |
| 256 | |
Josef Bacik | 22ee698 | 2012-05-29 16:57:49 -0400 | [diff] [blame] | 257 | static inline int btrfs_inode_in_log(struct inode *inode, u64 generation) |
| 258 | { |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 259 | int ret = 0; |
| 260 | |
| 261 | spin_lock(&BTRFS_I(inode)->lock); |
Josef Bacik | 22ee698 | 2012-05-29 16:57:49 -0400 | [diff] [blame] | 262 | if (BTRFS_I(inode)->logged_trans == generation && |
Josef Bacik | a5874ce | 2013-09-11 09:55:42 -0400 | [diff] [blame] | 263 | BTRFS_I(inode)->last_sub_trans <= |
| 264 | BTRFS_I(inode)->last_log_commit && |
| 265 | BTRFS_I(inode)->last_sub_trans <= |
Filipe Manana | 125c4cf9 | 2014-09-11 21:22:14 +0100 | [diff] [blame] | 266 | BTRFS_I(inode)->root->last_log_commit) { |
| 267 | /* |
| 268 | * After a ranged fsync we might have left some extent maps |
| 269 | * (that fall outside the fsync's range). So return false |
| 270 | * here if the list isn't empty, to make sure btrfs_log_inode() |
| 271 | * will be called and process those extent maps. |
| 272 | */ |
| 273 | smp_mb(); |
| 274 | if (list_empty(&BTRFS_I(inode)->extent_tree.modified_extents)) |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 275 | ret = 1; |
Filipe Manana | 125c4cf9 | 2014-09-11 21:22:14 +0100 | [diff] [blame] | 276 | } |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 277 | spin_unlock(&BTRFS_I(inode)->lock); |
| 278 | return ret; |
Josef Bacik | 22ee698 | 2012-05-29 16:57:49 -0400 | [diff] [blame] | 279 | } |
| 280 | |
Miao Xie | c1dc089 | 2014-09-12 18:43:56 +0800 | [diff] [blame] | 281 | #define BTRFS_DIO_ORIG_BIO_SUBMITTED 0x1 |
| 282 | |
Miao Xie | facc8a22 | 2013-07-25 19:22:34 +0800 | [diff] [blame] | 283 | struct btrfs_dio_private { |
| 284 | struct inode *inode; |
Miao Xie | c1dc089 | 2014-09-12 18:43:56 +0800 | [diff] [blame] | 285 | unsigned long flags; |
Miao Xie | facc8a22 | 2013-07-25 19:22:34 +0800 | [diff] [blame] | 286 | u64 logical_offset; |
| 287 | u64 disk_bytenr; |
| 288 | u64 bytes; |
| 289 | void *private; |
| 290 | |
| 291 | /* number of bios pending for this dio */ |
| 292 | atomic_t pending_bios; |
| 293 | |
| 294 | /* IO errors */ |
| 295 | int errors; |
| 296 | |
| 297 | /* orig_bio is our btrfs_io_bio */ |
| 298 | struct bio *orig_bio; |
| 299 | |
| 300 | /* dio_bio came from fs/direct-io.c */ |
| 301 | struct bio *dio_bio; |
Miao Xie | c1dc089 | 2014-09-12 18:43:56 +0800 | [diff] [blame] | 302 | |
| 303 | /* |
| 304 | * The original bio may be splited to several sub-bios, this is |
| 305 | * done during endio of sub-bios |
| 306 | */ |
Miao Xie | 8b110e3 | 2014-09-12 18:44:03 +0800 | [diff] [blame] | 307 | int (*subio_endio)(struct inode *, struct btrfs_io_bio *, int); |
Miao Xie | facc8a22 | 2013-07-25 19:22:34 +0800 | [diff] [blame] | 308 | }; |
| 309 | |
Miao Xie | 2e60a51 | 2013-02-08 07:01:08 +0000 | [diff] [blame] | 310 | /* |
| 311 | * Disable DIO read nolock optimization, so new dio readers will be forced |
| 312 | * to grab i_mutex. It is used to avoid the endless truncate due to |
| 313 | * nonlocked dio read. |
| 314 | */ |
| 315 | static inline void btrfs_inode_block_unlocked_dio(struct inode *inode) |
| 316 | { |
| 317 | set_bit(BTRFS_INODE_READDIO_NEED_LOCK, &BTRFS_I(inode)->runtime_flags); |
| 318 | smp_mb(); |
| 319 | } |
| 320 | |
| 321 | static inline void btrfs_inode_resume_unlocked_dio(struct inode *inode) |
| 322 | { |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 323 | smp_mb__before_atomic(); |
Miao Xie | 2e60a51 | 2013-02-08 07:01:08 +0000 | [diff] [blame] | 324 | clear_bit(BTRFS_INODE_READDIO_NEED_LOCK, |
| 325 | &BTRFS_I(inode)->runtime_flags); |
| 326 | } |
| 327 | |
Alex Gartrell | fc4adbf | 2014-05-20 13:07:56 -0700 | [diff] [blame] | 328 | bool btrfs_page_exists_in_range(struct inode *inode, loff_t start, loff_t end); |
| 329 | |
Chris Mason | 2c90e5d | 2007-04-02 10:50:19 -0400 | [diff] [blame] | 330 | #endif |