Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 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 | #include <linux/sched.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 20 | #include <linux/slab.h> |
Miao Xie | c6adc9c | 2013-05-28 10:05:39 +0000 | [diff] [blame] | 21 | #include <linux/blkdev.h> |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 22 | #include <linux/list_sort.h> |
Miao Xie | 995946d | 2014-04-02 19:51:06 +0800 | [diff] [blame] | 23 | #include "tree-log.h" |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 24 | #include "disk-io.h" |
| 25 | #include "locking.h" |
| 26 | #include "print-tree.h" |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 27 | #include "backref.h" |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 28 | #include "hash.h" |
Anand Jain | ebb8765 | 2016-03-10 17:26:59 +0800 | [diff] [blame] | 29 | #include "compression.h" |
Qu Wenruo | df2c95f | 2016-08-15 10:36:52 +0800 | [diff] [blame] | 30 | #include "qgroup.h" |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 31 | |
| 32 | /* magic values for the inode_only field in btrfs_log_inode: |
| 33 | * |
| 34 | * LOG_INODE_ALL means to log everything |
| 35 | * LOG_INODE_EXISTS means to log just enough to recreate the inode |
| 36 | * during log replay |
| 37 | */ |
| 38 | #define LOG_INODE_ALL 0 |
| 39 | #define LOG_INODE_EXISTS 1 |
Liu Bo | 781feef | 2016-11-30 16:20:25 -0800 | [diff] [blame] | 40 | #define LOG_OTHER_INODE 2 |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 41 | |
| 42 | /* |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 43 | * directory trouble cases |
| 44 | * |
| 45 | * 1) on rename or unlink, if the inode being unlinked isn't in the fsync |
| 46 | * log, we must force a full commit before doing an fsync of the directory |
| 47 | * where the unlink was done. |
| 48 | * ---> record transid of last unlink/rename per directory |
| 49 | * |
| 50 | * mkdir foo/some_dir |
| 51 | * normal commit |
| 52 | * rename foo/some_dir foo2/some_dir |
| 53 | * mkdir foo/some_dir |
| 54 | * fsync foo/some_dir/some_file |
| 55 | * |
| 56 | * The fsync above will unlink the original some_dir without recording |
| 57 | * it in its new location (foo2). After a crash, some_dir will be gone |
| 58 | * unless the fsync of some_file forces a full commit |
| 59 | * |
| 60 | * 2) we must log any new names for any file or dir that is in the fsync |
| 61 | * log. ---> check inode while renaming/linking. |
| 62 | * |
| 63 | * 2a) we must log any new names for any file or dir during rename |
| 64 | * when the directory they are being removed from was logged. |
| 65 | * ---> check inode and old parent dir during rename |
| 66 | * |
| 67 | * 2a is actually the more important variant. With the extra logging |
| 68 | * a crash might unlink the old name without recreating the new one |
| 69 | * |
| 70 | * 3) after a crash, we must go through any directories with a link count |
| 71 | * of zero and redo the rm -rf |
| 72 | * |
| 73 | * mkdir f1/foo |
| 74 | * normal commit |
| 75 | * rm -rf f1/foo |
| 76 | * fsync(f1) |
| 77 | * |
| 78 | * The directory f1 was fully removed from the FS, but fsync was never |
| 79 | * called on f1, only its parent dir. After a crash the rm -rf must |
| 80 | * be replayed. This must be able to recurse down the entire |
| 81 | * directory tree. The inode link count fixup code takes care of the |
| 82 | * ugly details. |
| 83 | */ |
| 84 | |
| 85 | /* |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 86 | * stages for the tree walking. The first |
| 87 | * stage (0) is to only pin down the blocks we find |
| 88 | * the second stage (1) is to make sure that all the inodes |
| 89 | * we find in the log are created in the subvolume. |
| 90 | * |
| 91 | * The last stage is to deal with directories and links and extents |
| 92 | * and all the other fun semantics |
| 93 | */ |
| 94 | #define LOG_WALK_PIN_ONLY 0 |
| 95 | #define LOG_WALK_REPLAY_INODES 1 |
Josef Bacik | dd8e721 | 2013-09-11 11:57:23 -0400 | [diff] [blame] | 96 | #define LOG_WALK_REPLAY_DIR_INDEX 2 |
| 97 | #define LOG_WALK_REPLAY_ALL 3 |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 98 | |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 99 | static int btrfs_log_inode(struct btrfs_trans_handle *trans, |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 100 | struct btrfs_root *root, struct btrfs_inode *inode, |
Filipe Manana | 49dae1b | 2014-09-06 22:34:39 +0100 | [diff] [blame] | 101 | int inode_only, |
| 102 | const loff_t start, |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 103 | const loff_t end, |
| 104 | struct btrfs_log_ctx *ctx); |
Yan Zheng | ec051c0 | 2009-01-05 15:43:42 -0500 | [diff] [blame] | 105 | static int link_to_fixup_dir(struct btrfs_trans_handle *trans, |
| 106 | struct btrfs_root *root, |
| 107 | struct btrfs_path *path, u64 objectid); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 108 | static noinline int replay_dir_deletes(struct btrfs_trans_handle *trans, |
| 109 | struct btrfs_root *root, |
| 110 | struct btrfs_root *log, |
| 111 | struct btrfs_path *path, |
| 112 | u64 dirid, int del_all); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 113 | |
| 114 | /* |
| 115 | * tree logging is a special write ahead log used to make sure that |
| 116 | * fsyncs and O_SYNCs can happen without doing full tree commits. |
| 117 | * |
| 118 | * Full tree commits are expensive because they require commonly |
| 119 | * modified blocks to be recowed, creating many dirty pages in the |
| 120 | * extent tree an 4x-6x higher write load than ext3. |
| 121 | * |
| 122 | * Instead of doing a tree commit on every fsync, we use the |
| 123 | * key ranges and transaction ids to find items for a given file or directory |
| 124 | * that have changed in this transaction. Those items are copied into |
| 125 | * a special tree (one per subvolume root), that tree is written to disk |
| 126 | * and then the fsync is considered complete. |
| 127 | * |
| 128 | * After a crash, items are copied out of the log-tree back into the |
| 129 | * subvolume tree. Any file data extents found are recorded in the extent |
| 130 | * allocation tree, and the log-tree freed. |
| 131 | * |
| 132 | * The log tree is read three times, once to pin down all the extents it is |
| 133 | * using in ram and once, once to create all the inodes logged in the tree |
| 134 | * and once to do all the other items. |
| 135 | */ |
| 136 | |
| 137 | /* |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 138 | * start a sub transaction and setup the log tree |
| 139 | * this increments the log tree writer count to make the people |
| 140 | * syncing the tree wait for us to finish |
| 141 | */ |
| 142 | static int start_log_trans(struct btrfs_trans_handle *trans, |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 143 | struct btrfs_root *root, |
| 144 | struct btrfs_log_ctx *ctx) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 145 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 146 | struct btrfs_fs_info *fs_info = root->fs_info; |
Zhaolei | 34eb2a5 | 2015-08-17 18:44:45 +0800 | [diff] [blame] | 147 | int ret = 0; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 148 | |
| 149 | mutex_lock(&root->log_mutex); |
Zhaolei | 34eb2a5 | 2015-08-17 18:44:45 +0800 | [diff] [blame] | 150 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 151 | if (root->log_root) { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 152 | if (btrfs_need_log_full_commit(fs_info, trans)) { |
Miao Xie | 50471a3 | 2014-02-20 18:08:57 +0800 | [diff] [blame] | 153 | ret = -EAGAIN; |
| 154 | goto out; |
| 155 | } |
Zhaolei | 34eb2a5 | 2015-08-17 18:44:45 +0800 | [diff] [blame] | 156 | |
Josef Bacik | ff782e0 | 2009-10-08 15:30:04 -0400 | [diff] [blame] | 157 | if (!root->log_start_pid) { |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 158 | clear_bit(BTRFS_ROOT_MULTI_LOG_TASKS, &root->state); |
Zhaolei | 34eb2a5 | 2015-08-17 18:44:45 +0800 | [diff] [blame] | 159 | root->log_start_pid = current->pid; |
Josef Bacik | ff782e0 | 2009-10-08 15:30:04 -0400 | [diff] [blame] | 160 | } else if (root->log_start_pid != current->pid) { |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 161 | set_bit(BTRFS_ROOT_MULTI_LOG_TASKS, &root->state); |
Josef Bacik | ff782e0 | 2009-10-08 15:30:04 -0400 | [diff] [blame] | 162 | } |
Zhaolei | 34eb2a5 | 2015-08-17 18:44:45 +0800 | [diff] [blame] | 163 | } else { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 164 | mutex_lock(&fs_info->tree_log_mutex); |
| 165 | if (!fs_info->log_root_tree) |
| 166 | ret = btrfs_init_log_root_tree(trans, fs_info); |
| 167 | mutex_unlock(&fs_info->tree_log_mutex); |
Zhaolei | 34eb2a5 | 2015-08-17 18:44:45 +0800 | [diff] [blame] | 168 | if (ret) |
| 169 | goto out; |
Josef Bacik | ff782e0 | 2009-10-08 15:30:04 -0400 | [diff] [blame] | 170 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 171 | ret = btrfs_add_log_tree(trans, root); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 172 | if (ret) |
Miao Xie | e87ac13 | 2014-02-20 18:08:53 +0800 | [diff] [blame] | 173 | goto out; |
Zhaolei | 34eb2a5 | 2015-08-17 18:44:45 +0800 | [diff] [blame] | 174 | |
| 175 | clear_bit(BTRFS_ROOT_MULTI_LOG_TASKS, &root->state); |
| 176 | root->log_start_pid = current->pid; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 177 | } |
Zhaolei | 34eb2a5 | 2015-08-17 18:44:45 +0800 | [diff] [blame] | 178 | |
Miao Xie | 2ecb792 | 2012-09-06 04:04:27 -0600 | [diff] [blame] | 179 | atomic_inc(&root->log_batch); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 180 | atomic_inc(&root->log_writers); |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 181 | if (ctx) { |
Zhaolei | 34eb2a5 | 2015-08-17 18:44:45 +0800 | [diff] [blame] | 182 | int index = root->log_transid % 2; |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 183 | list_add_tail(&ctx->list, &root->log_ctxs[index]); |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 184 | ctx->log_transid = root->log_transid; |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 185 | } |
Zhaolei | 34eb2a5 | 2015-08-17 18:44:45 +0800 | [diff] [blame] | 186 | |
Miao Xie | e87ac13 | 2014-02-20 18:08:53 +0800 | [diff] [blame] | 187 | out: |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 188 | mutex_unlock(&root->log_mutex); |
Miao Xie | e87ac13 | 2014-02-20 18:08:53 +0800 | [diff] [blame] | 189 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | /* |
| 193 | * returns 0 if there was a log transaction running and we were able |
| 194 | * to join, or returns -ENOENT if there were not transactions |
| 195 | * in progress |
| 196 | */ |
| 197 | static int join_running_log_trans(struct btrfs_root *root) |
| 198 | { |
| 199 | int ret = -ENOENT; |
| 200 | |
| 201 | smp_mb(); |
| 202 | if (!root->log_root) |
| 203 | return -ENOENT; |
| 204 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 205 | mutex_lock(&root->log_mutex); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 206 | if (root->log_root) { |
| 207 | ret = 0; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 208 | atomic_inc(&root->log_writers); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 209 | } |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 210 | mutex_unlock(&root->log_mutex); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 211 | return ret; |
| 212 | } |
| 213 | |
| 214 | /* |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 215 | * This either makes the current running log transaction wait |
| 216 | * until you call btrfs_end_log_trans() or it makes any future |
| 217 | * log transactions wait until you call btrfs_end_log_trans() |
| 218 | */ |
| 219 | int btrfs_pin_log_trans(struct btrfs_root *root) |
| 220 | { |
| 221 | int ret = -ENOENT; |
| 222 | |
| 223 | mutex_lock(&root->log_mutex); |
| 224 | atomic_inc(&root->log_writers); |
| 225 | mutex_unlock(&root->log_mutex); |
| 226 | return ret; |
| 227 | } |
| 228 | |
| 229 | /* |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 230 | * indicate we're done making changes to the log tree |
| 231 | * and wake up anyone waiting to do a sync |
| 232 | */ |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 233 | void btrfs_end_log_trans(struct btrfs_root *root) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 234 | { |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 235 | if (atomic_dec_and_test(&root->log_writers)) { |
David Sterba | 779adf0 | 2015-02-16 19:39:00 +0100 | [diff] [blame] | 236 | /* |
| 237 | * Implicit memory barrier after atomic_dec_and_test |
| 238 | */ |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 239 | if (waitqueue_active(&root->log_writer_wait)) |
| 240 | wake_up(&root->log_writer_wait); |
| 241 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | |
| 245 | /* |
| 246 | * the walk control struct is used to pass state down the chain when |
| 247 | * processing the log tree. The stage field tells us which part |
| 248 | * of the log tree processing we are currently doing. The others |
| 249 | * are state fields used for that specific part |
| 250 | */ |
| 251 | struct walk_control { |
| 252 | /* should we free the extent on disk when done? This is used |
| 253 | * at transaction commit time while freeing a log tree |
| 254 | */ |
| 255 | int free; |
| 256 | |
| 257 | /* should we write out the extent buffer? This is used |
| 258 | * while flushing the log tree to disk during a sync |
| 259 | */ |
| 260 | int write; |
| 261 | |
| 262 | /* should we wait for the extent buffer io to finish? Also used |
| 263 | * while flushing the log tree to disk for a sync |
| 264 | */ |
| 265 | int wait; |
| 266 | |
| 267 | /* pin only walk, we record which extents on disk belong to the |
| 268 | * log trees |
| 269 | */ |
| 270 | int pin; |
| 271 | |
| 272 | /* what stage of the replay code we're currently in */ |
| 273 | int stage; |
| 274 | |
| 275 | /* the root we are currently replaying */ |
| 276 | struct btrfs_root *replay_dest; |
| 277 | |
| 278 | /* the trans handle for the current replay */ |
| 279 | struct btrfs_trans_handle *trans; |
| 280 | |
| 281 | /* the function that gets used to process blocks we find in the |
| 282 | * tree. Note the extent_buffer might not be up to date when it is |
| 283 | * passed in, and it must be checked or read if you need the data |
| 284 | * inside it |
| 285 | */ |
| 286 | int (*process_func)(struct btrfs_root *log, struct extent_buffer *eb, |
| 287 | struct walk_control *wc, u64 gen); |
| 288 | }; |
| 289 | |
| 290 | /* |
| 291 | * process_func used to pin down extents, write them or wait on them |
| 292 | */ |
| 293 | static int process_one_buffer(struct btrfs_root *log, |
| 294 | struct extent_buffer *eb, |
| 295 | struct walk_control *wc, u64 gen) |
| 296 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 297 | struct btrfs_fs_info *fs_info = log->fs_info; |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 298 | int ret = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 299 | |
Josef Bacik | 8c2a1a3 | 2013-06-06 13:19:32 -0400 | [diff] [blame] | 300 | /* |
| 301 | * If this fs is mixed then we need to be able to process the leaves to |
| 302 | * pin down any logged extents, so we have to read the block. |
| 303 | */ |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 304 | if (btrfs_fs_incompat(fs_info, MIXED_GROUPS)) { |
Josef Bacik | 8c2a1a3 | 2013-06-06 13:19:32 -0400 | [diff] [blame] | 305 | ret = btrfs_read_buffer(eb, gen); |
| 306 | if (ret) |
| 307 | return ret; |
| 308 | } |
| 309 | |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 310 | if (wc->pin) |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 311 | ret = btrfs_pin_extent_for_log_replay(fs_info, eb->start, |
| 312 | eb->len); |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 313 | |
| 314 | if (!ret && btrfs_buffer_uptodate(eb, gen, 0)) { |
Josef Bacik | 8c2a1a3 | 2013-06-06 13:19:32 -0400 | [diff] [blame] | 315 | if (wc->pin && btrfs_header_level(eb) == 0) |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 316 | ret = btrfs_exclude_logged_extents(fs_info, eb); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 317 | if (wc->write) |
| 318 | btrfs_write_tree_block(eb); |
| 319 | if (wc->wait) |
| 320 | btrfs_wait_tree_block_writeback(eb); |
| 321 | } |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 322 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | /* |
| 326 | * Item overwrite used by replay and tree logging. eb, slot and key all refer |
| 327 | * to the src data we are copying out. |
| 328 | * |
| 329 | * root is the tree we are copying into, and path is a scratch |
| 330 | * path for use in this function (it should be released on entry and |
| 331 | * will be released on exit). |
| 332 | * |
| 333 | * If the key is already in the destination tree the existing item is |
| 334 | * overwritten. If the existing item isn't big enough, it is extended. |
| 335 | * If it is too large, it is truncated. |
| 336 | * |
| 337 | * If the key isn't in the destination yet, a new item is inserted. |
| 338 | */ |
| 339 | static noinline int overwrite_item(struct btrfs_trans_handle *trans, |
| 340 | struct btrfs_root *root, |
| 341 | struct btrfs_path *path, |
| 342 | struct extent_buffer *eb, int slot, |
| 343 | struct btrfs_key *key) |
| 344 | { |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 345 | struct btrfs_fs_info *fs_info = root->fs_info; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 346 | int ret; |
| 347 | u32 item_size; |
| 348 | u64 saved_i_size = 0; |
| 349 | int save_old_i_size = 0; |
| 350 | unsigned long src_ptr; |
| 351 | unsigned long dst_ptr; |
| 352 | int overwrite_root = 0; |
Josef Bacik | 4bc4bee | 2013-04-05 20:50:09 +0000 | [diff] [blame] | 353 | bool inode_item = key->type == BTRFS_INODE_ITEM_KEY; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 354 | |
| 355 | if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) |
| 356 | overwrite_root = 1; |
| 357 | |
| 358 | item_size = btrfs_item_size_nr(eb, slot); |
| 359 | src_ptr = btrfs_item_ptr_offset(eb, slot); |
| 360 | |
| 361 | /* look for the key in the destination tree */ |
| 362 | ret = btrfs_search_slot(NULL, root, key, path, 0, 0); |
Josef Bacik | 4bc4bee | 2013-04-05 20:50:09 +0000 | [diff] [blame] | 363 | if (ret < 0) |
| 364 | return ret; |
| 365 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 366 | if (ret == 0) { |
| 367 | char *src_copy; |
| 368 | char *dst_copy; |
| 369 | u32 dst_size = btrfs_item_size_nr(path->nodes[0], |
| 370 | path->slots[0]); |
| 371 | if (dst_size != item_size) |
| 372 | goto insert; |
| 373 | |
| 374 | if (item_size == 0) { |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 375 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 376 | return 0; |
| 377 | } |
| 378 | dst_copy = kmalloc(item_size, GFP_NOFS); |
| 379 | src_copy = kmalloc(item_size, GFP_NOFS); |
liubo | 2a29edc | 2011-01-26 06:22:08 +0000 | [diff] [blame] | 380 | if (!dst_copy || !src_copy) { |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 381 | btrfs_release_path(path); |
liubo | 2a29edc | 2011-01-26 06:22:08 +0000 | [diff] [blame] | 382 | kfree(dst_copy); |
| 383 | kfree(src_copy); |
| 384 | return -ENOMEM; |
| 385 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 386 | |
| 387 | read_extent_buffer(eb, src_copy, src_ptr, item_size); |
| 388 | |
| 389 | dst_ptr = btrfs_item_ptr_offset(path->nodes[0], path->slots[0]); |
| 390 | read_extent_buffer(path->nodes[0], dst_copy, dst_ptr, |
| 391 | item_size); |
| 392 | ret = memcmp(dst_copy, src_copy, item_size); |
| 393 | |
| 394 | kfree(dst_copy); |
| 395 | kfree(src_copy); |
| 396 | /* |
| 397 | * they have the same contents, just return, this saves |
| 398 | * us from cowing blocks in the destination tree and doing |
| 399 | * extra writes that may not have been done by a previous |
| 400 | * sync |
| 401 | */ |
| 402 | if (ret == 0) { |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 403 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 404 | return 0; |
| 405 | } |
| 406 | |
Josef Bacik | 4bc4bee | 2013-04-05 20:50:09 +0000 | [diff] [blame] | 407 | /* |
| 408 | * We need to load the old nbytes into the inode so when we |
| 409 | * replay the extents we've logged we get the right nbytes. |
| 410 | */ |
| 411 | if (inode_item) { |
| 412 | struct btrfs_inode_item *item; |
| 413 | u64 nbytes; |
Josef Bacik | d555438 | 2013-09-11 14:17:00 -0400 | [diff] [blame] | 414 | u32 mode; |
Josef Bacik | 4bc4bee | 2013-04-05 20:50:09 +0000 | [diff] [blame] | 415 | |
| 416 | item = btrfs_item_ptr(path->nodes[0], path->slots[0], |
| 417 | struct btrfs_inode_item); |
| 418 | nbytes = btrfs_inode_nbytes(path->nodes[0], item); |
| 419 | item = btrfs_item_ptr(eb, slot, |
| 420 | struct btrfs_inode_item); |
| 421 | btrfs_set_inode_nbytes(eb, item, nbytes); |
Josef Bacik | d555438 | 2013-09-11 14:17:00 -0400 | [diff] [blame] | 422 | |
| 423 | /* |
| 424 | * If this is a directory we need to reset the i_size to |
| 425 | * 0 so that we can set it up properly when replaying |
| 426 | * the rest of the items in this log. |
| 427 | */ |
| 428 | mode = btrfs_inode_mode(eb, item); |
| 429 | if (S_ISDIR(mode)) |
| 430 | btrfs_set_inode_size(eb, item, 0); |
Josef Bacik | 4bc4bee | 2013-04-05 20:50:09 +0000 | [diff] [blame] | 431 | } |
| 432 | } else if (inode_item) { |
| 433 | struct btrfs_inode_item *item; |
Josef Bacik | d555438 | 2013-09-11 14:17:00 -0400 | [diff] [blame] | 434 | u32 mode; |
Josef Bacik | 4bc4bee | 2013-04-05 20:50:09 +0000 | [diff] [blame] | 435 | |
| 436 | /* |
| 437 | * New inode, set nbytes to 0 so that the nbytes comes out |
| 438 | * properly when we replay the extents. |
| 439 | */ |
| 440 | item = btrfs_item_ptr(eb, slot, struct btrfs_inode_item); |
| 441 | btrfs_set_inode_nbytes(eb, item, 0); |
Josef Bacik | d555438 | 2013-09-11 14:17:00 -0400 | [diff] [blame] | 442 | |
| 443 | /* |
| 444 | * If this is a directory we need to reset the i_size to 0 so |
| 445 | * that we can set it up properly when replaying the rest of |
| 446 | * the items in this log. |
| 447 | */ |
| 448 | mode = btrfs_inode_mode(eb, item); |
| 449 | if (S_ISDIR(mode)) |
| 450 | btrfs_set_inode_size(eb, item, 0); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 451 | } |
| 452 | insert: |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 453 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 454 | /* try to insert the key into the destination tree */ |
Filipe Manana | df8d116 | 2015-01-14 01:52:25 +0000 | [diff] [blame] | 455 | path->skip_release_on_error = 1; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 456 | ret = btrfs_insert_empty_item(trans, root, path, |
| 457 | key, item_size); |
Filipe Manana | df8d116 | 2015-01-14 01:52:25 +0000 | [diff] [blame] | 458 | path->skip_release_on_error = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 459 | |
| 460 | /* make sure any existing item is the correct size */ |
Filipe Manana | df8d116 | 2015-01-14 01:52:25 +0000 | [diff] [blame] | 461 | if (ret == -EEXIST || ret == -EOVERFLOW) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 462 | u32 found_size; |
| 463 | found_size = btrfs_item_size_nr(path->nodes[0], |
| 464 | path->slots[0]); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 465 | if (found_size > item_size) |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 466 | btrfs_truncate_item(fs_info, path, item_size, 1); |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 467 | else if (found_size < item_size) |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 468 | btrfs_extend_item(fs_info, path, |
Jeff Mahoney | 143bede | 2012-03-01 14:56:26 +0100 | [diff] [blame] | 469 | item_size - found_size); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 470 | } else if (ret) { |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 471 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 472 | } |
| 473 | dst_ptr = btrfs_item_ptr_offset(path->nodes[0], |
| 474 | path->slots[0]); |
| 475 | |
| 476 | /* don't overwrite an existing inode if the generation number |
| 477 | * was logged as zero. This is done when the tree logging code |
| 478 | * is just logging an inode to make sure it exists after recovery. |
| 479 | * |
| 480 | * Also, don't overwrite i_size on directories during replay. |
| 481 | * log replay inserts and removes directory items based on the |
| 482 | * state of the tree found in the subvolume, and i_size is modified |
| 483 | * as it goes |
| 484 | */ |
| 485 | if (key->type == BTRFS_INODE_ITEM_KEY && ret == -EEXIST) { |
| 486 | struct btrfs_inode_item *src_item; |
| 487 | struct btrfs_inode_item *dst_item; |
| 488 | |
| 489 | src_item = (struct btrfs_inode_item *)src_ptr; |
| 490 | dst_item = (struct btrfs_inode_item *)dst_ptr; |
| 491 | |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 492 | if (btrfs_inode_generation(eb, src_item) == 0) { |
| 493 | struct extent_buffer *dst_eb = path->nodes[0]; |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 494 | const u64 ino_size = btrfs_inode_size(eb, src_item); |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 495 | |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 496 | /* |
| 497 | * For regular files an ino_size == 0 is used only when |
| 498 | * logging that an inode exists, as part of a directory |
| 499 | * fsync, and the inode wasn't fsynced before. In this |
| 500 | * case don't set the size of the inode in the fs/subvol |
| 501 | * tree, otherwise we would be throwing valid data away. |
| 502 | */ |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 503 | if (S_ISREG(btrfs_inode_mode(eb, src_item)) && |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 504 | S_ISREG(btrfs_inode_mode(dst_eb, dst_item)) && |
| 505 | ino_size != 0) { |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 506 | struct btrfs_map_token token; |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 507 | |
| 508 | btrfs_init_map_token(&token); |
| 509 | btrfs_set_token_inode_size(dst_eb, dst_item, |
| 510 | ino_size, &token); |
| 511 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 512 | goto no_copy; |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 513 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 514 | |
| 515 | if (overwrite_root && |
| 516 | S_ISDIR(btrfs_inode_mode(eb, src_item)) && |
| 517 | S_ISDIR(btrfs_inode_mode(path->nodes[0], dst_item))) { |
| 518 | save_old_i_size = 1; |
| 519 | saved_i_size = btrfs_inode_size(path->nodes[0], |
| 520 | dst_item); |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | copy_extent_buffer(path->nodes[0], eb, dst_ptr, |
| 525 | src_ptr, item_size); |
| 526 | |
| 527 | if (save_old_i_size) { |
| 528 | struct btrfs_inode_item *dst_item; |
| 529 | dst_item = (struct btrfs_inode_item *)dst_ptr; |
| 530 | btrfs_set_inode_size(path->nodes[0], dst_item, saved_i_size); |
| 531 | } |
| 532 | |
| 533 | /* make sure the generation is filled in */ |
| 534 | if (key->type == BTRFS_INODE_ITEM_KEY) { |
| 535 | struct btrfs_inode_item *dst_item; |
| 536 | dst_item = (struct btrfs_inode_item *)dst_ptr; |
| 537 | if (btrfs_inode_generation(path->nodes[0], dst_item) == 0) { |
| 538 | btrfs_set_inode_generation(path->nodes[0], dst_item, |
| 539 | trans->transid); |
| 540 | } |
| 541 | } |
| 542 | no_copy: |
| 543 | btrfs_mark_buffer_dirty(path->nodes[0]); |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 544 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 545 | return 0; |
| 546 | } |
| 547 | |
| 548 | /* |
| 549 | * simple helper to read an inode off the disk from a given root |
| 550 | * This can only be called for subvolume roots and not for the log |
| 551 | */ |
| 552 | static noinline struct inode *read_one_inode(struct btrfs_root *root, |
| 553 | u64 objectid) |
| 554 | { |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 555 | struct btrfs_key key; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 556 | struct inode *inode; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 557 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 558 | key.objectid = objectid; |
| 559 | key.type = BTRFS_INODE_ITEM_KEY; |
| 560 | key.offset = 0; |
Josef Bacik | 73f7341 | 2009-12-04 17:38:27 +0000 | [diff] [blame] | 561 | inode = btrfs_iget(root->fs_info->sb, &key, root, NULL); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 562 | if (IS_ERR(inode)) { |
| 563 | inode = NULL; |
| 564 | } else if (is_bad_inode(inode)) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 565 | iput(inode); |
| 566 | inode = NULL; |
| 567 | } |
| 568 | return inode; |
| 569 | } |
| 570 | |
| 571 | /* replays a single extent in 'eb' at 'slot' with 'key' into the |
| 572 | * subvolume 'root'. path is released on entry and should be released |
| 573 | * on exit. |
| 574 | * |
| 575 | * extents in the log tree have not been allocated out of the extent |
| 576 | * tree yet. So, this completes the allocation, taking a reference |
| 577 | * as required if the extent already exists or creating a new extent |
| 578 | * if it isn't in the extent allocation tree yet. |
| 579 | * |
| 580 | * The extent is inserted into the file, dropping any existing extents |
| 581 | * from the file that overlap the new one. |
| 582 | */ |
| 583 | static noinline int replay_one_extent(struct btrfs_trans_handle *trans, |
| 584 | struct btrfs_root *root, |
| 585 | struct btrfs_path *path, |
| 586 | struct extent_buffer *eb, int slot, |
| 587 | struct btrfs_key *key) |
| 588 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 589 | struct btrfs_fs_info *fs_info = root->fs_info; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 590 | int found_type; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 591 | u64 extent_end; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 592 | u64 start = key->offset; |
Josef Bacik | 4bc4bee | 2013-04-05 20:50:09 +0000 | [diff] [blame] | 593 | u64 nbytes = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 594 | struct btrfs_file_extent_item *item; |
| 595 | struct inode *inode = NULL; |
| 596 | unsigned long size; |
| 597 | int ret = 0; |
| 598 | |
| 599 | item = btrfs_item_ptr(eb, slot, struct btrfs_file_extent_item); |
| 600 | found_type = btrfs_file_extent_type(eb, item); |
| 601 | |
Yan Zheng | d899e05 | 2008-10-30 14:25:28 -0400 | [diff] [blame] | 602 | if (found_type == BTRFS_FILE_EXTENT_REG || |
Josef Bacik | 4bc4bee | 2013-04-05 20:50:09 +0000 | [diff] [blame] | 603 | found_type == BTRFS_FILE_EXTENT_PREALLOC) { |
| 604 | nbytes = btrfs_file_extent_num_bytes(eb, item); |
| 605 | extent_end = start + nbytes; |
| 606 | |
| 607 | /* |
| 608 | * We don't add to the inodes nbytes if we are prealloc or a |
| 609 | * hole. |
| 610 | */ |
| 611 | if (btrfs_file_extent_disk_bytenr(eb, item) == 0) |
| 612 | nbytes = 0; |
| 613 | } else if (found_type == BTRFS_FILE_EXTENT_INLINE) { |
Chris Mason | 514ac8a | 2014-01-03 21:07:00 -0800 | [diff] [blame] | 614 | size = btrfs_file_extent_inline_len(eb, slot, item); |
Josef Bacik | 4bc4bee | 2013-04-05 20:50:09 +0000 | [diff] [blame] | 615 | nbytes = btrfs_file_extent_ram_bytes(eb, item); |
Jeff Mahoney | da17066 | 2016-06-15 09:22:56 -0400 | [diff] [blame] | 616 | extent_end = ALIGN(start + size, |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 617 | fs_info->sectorsize); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 618 | } else { |
| 619 | ret = 0; |
| 620 | goto out; |
| 621 | } |
| 622 | |
| 623 | inode = read_one_inode(root, key->objectid); |
| 624 | if (!inode) { |
| 625 | ret = -EIO; |
| 626 | goto out; |
| 627 | } |
| 628 | |
| 629 | /* |
| 630 | * first check to see if we already have this extent in the |
| 631 | * file. This must be done before the btrfs_drop_extents run |
| 632 | * so we don't try to drop this extent. |
| 633 | */ |
Nikolay Borisov | 4a0cc7c | 2017-01-10 20:35:31 +0200 | [diff] [blame] | 634 | ret = btrfs_lookup_file_extent(trans, root, path, btrfs_ino(BTRFS_I(inode)), |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 635 | start, 0); |
| 636 | |
Yan Zheng | d899e05 | 2008-10-30 14:25:28 -0400 | [diff] [blame] | 637 | if (ret == 0 && |
| 638 | (found_type == BTRFS_FILE_EXTENT_REG || |
| 639 | found_type == BTRFS_FILE_EXTENT_PREALLOC)) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 640 | struct btrfs_file_extent_item cmp1; |
| 641 | struct btrfs_file_extent_item cmp2; |
| 642 | struct btrfs_file_extent_item *existing; |
| 643 | struct extent_buffer *leaf; |
| 644 | |
| 645 | leaf = path->nodes[0]; |
| 646 | existing = btrfs_item_ptr(leaf, path->slots[0], |
| 647 | struct btrfs_file_extent_item); |
| 648 | |
| 649 | read_extent_buffer(eb, &cmp1, (unsigned long)item, |
| 650 | sizeof(cmp1)); |
| 651 | read_extent_buffer(leaf, &cmp2, (unsigned long)existing, |
| 652 | sizeof(cmp2)); |
| 653 | |
| 654 | /* |
| 655 | * we already have a pointer to this exact extent, |
| 656 | * we don't have to do anything |
| 657 | */ |
| 658 | if (memcmp(&cmp1, &cmp2, sizeof(cmp1)) == 0) { |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 659 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 660 | goto out; |
| 661 | } |
| 662 | } |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 663 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 664 | |
| 665 | /* drop any overlapping extents */ |
Josef Bacik | 2671485 | 2012-08-29 12:24:27 -0400 | [diff] [blame] | 666 | ret = btrfs_drop_extents(trans, root, inode, start, extent_end, 1); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 667 | if (ret) |
| 668 | goto out; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 669 | |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 670 | if (found_type == BTRFS_FILE_EXTENT_REG || |
| 671 | found_type == BTRFS_FILE_EXTENT_PREALLOC) { |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 672 | u64 offset; |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 673 | unsigned long dest_offset; |
| 674 | struct btrfs_key ins; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 675 | |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 676 | ret = btrfs_insert_empty_item(trans, root, path, key, |
| 677 | sizeof(*item)); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 678 | if (ret) |
| 679 | goto out; |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 680 | dest_offset = btrfs_item_ptr_offset(path->nodes[0], |
| 681 | path->slots[0]); |
| 682 | copy_extent_buffer(path->nodes[0], eb, dest_offset, |
| 683 | (unsigned long)item, sizeof(*item)); |
| 684 | |
| 685 | ins.objectid = btrfs_file_extent_disk_bytenr(eb, item); |
| 686 | ins.offset = btrfs_file_extent_disk_num_bytes(eb, item); |
| 687 | ins.type = BTRFS_EXTENT_ITEM_KEY; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 688 | offset = key->offset - btrfs_file_extent_offset(eb, item); |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 689 | |
Qu Wenruo | df2c95f | 2016-08-15 10:36:52 +0800 | [diff] [blame] | 690 | /* |
| 691 | * Manually record dirty extent, as here we did a shallow |
| 692 | * file extent item copy and skip normal backref update, |
| 693 | * but modifying extent tree all by ourselves. |
| 694 | * So need to manually record dirty extent for qgroup, |
| 695 | * as the owner of the file extent changed from log tree |
| 696 | * (doesn't affect qgroup) to fs/file tree(affects qgroup) |
| 697 | */ |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 698 | ret = btrfs_qgroup_trace_extent(trans, fs_info, |
Qu Wenruo | df2c95f | 2016-08-15 10:36:52 +0800 | [diff] [blame] | 699 | btrfs_file_extent_disk_bytenr(eb, item), |
| 700 | btrfs_file_extent_disk_num_bytes(eb, item), |
| 701 | GFP_NOFS); |
| 702 | if (ret < 0) |
| 703 | goto out; |
| 704 | |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 705 | if (ins.objectid > 0) { |
| 706 | u64 csum_start; |
| 707 | u64 csum_end; |
| 708 | LIST_HEAD(ordered_sums); |
| 709 | /* |
| 710 | * is this extent already allocated in the extent |
| 711 | * allocation tree? If so, just add a reference |
| 712 | */ |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 713 | ret = btrfs_lookup_data_extent(fs_info, ins.objectid, |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 714 | ins.offset); |
| 715 | if (ret == 0) { |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 716 | ret = btrfs_inc_extent_ref(trans, fs_info, |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 717 | ins.objectid, ins.offset, |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 718 | 0, root->root_key.objectid, |
Filipe Manana | b06c4bf | 2015-10-23 07:52:54 +0100 | [diff] [blame] | 719 | key->objectid, offset); |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 720 | if (ret) |
| 721 | goto out; |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 722 | } else { |
| 723 | /* |
| 724 | * insert the extent pointer in the extent |
| 725 | * allocation tree |
| 726 | */ |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 727 | ret = btrfs_alloc_logged_file_extent(trans, |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 728 | fs_info, |
| 729 | root->root_key.objectid, |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 730 | key->objectid, offset, &ins); |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 731 | if (ret) |
| 732 | goto out; |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 733 | } |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 734 | btrfs_release_path(path); |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 735 | |
| 736 | if (btrfs_file_extent_compression(eb, item)) { |
| 737 | csum_start = ins.objectid; |
| 738 | csum_end = csum_start + ins.offset; |
| 739 | } else { |
| 740 | csum_start = ins.objectid + |
| 741 | btrfs_file_extent_offset(eb, item); |
| 742 | csum_end = csum_start + |
| 743 | btrfs_file_extent_num_bytes(eb, item); |
| 744 | } |
| 745 | |
| 746 | ret = btrfs_lookup_csums_range(root->log_root, |
| 747 | csum_start, csum_end - 1, |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 748 | &ordered_sums, 0); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 749 | if (ret) |
| 750 | goto out; |
Filipe Manana | b84b839 | 2015-08-19 11:09:40 +0100 | [diff] [blame] | 751 | /* |
| 752 | * Now delete all existing cums in the csum root that |
| 753 | * cover our range. We do this because we can have an |
| 754 | * extent that is completely referenced by one file |
| 755 | * extent item and partially referenced by another |
| 756 | * file extent item (like after using the clone or |
| 757 | * extent_same ioctls). In this case if we end up doing |
| 758 | * the replay of the one that partially references the |
| 759 | * extent first, and we do not do the csum deletion |
| 760 | * below, we can get 2 csum items in the csum tree that |
| 761 | * overlap each other. For example, imagine our log has |
| 762 | * the two following file extent items: |
| 763 | * |
| 764 | * key (257 EXTENT_DATA 409600) |
| 765 | * extent data disk byte 12845056 nr 102400 |
| 766 | * extent data offset 20480 nr 20480 ram 102400 |
| 767 | * |
| 768 | * key (257 EXTENT_DATA 819200) |
| 769 | * extent data disk byte 12845056 nr 102400 |
| 770 | * extent data offset 0 nr 102400 ram 102400 |
| 771 | * |
| 772 | * Where the second one fully references the 100K extent |
| 773 | * that starts at disk byte 12845056, and the log tree |
| 774 | * has a single csum item that covers the entire range |
| 775 | * of the extent: |
| 776 | * |
| 777 | * key (EXTENT_CSUM EXTENT_CSUM 12845056) itemsize 100 |
| 778 | * |
| 779 | * After the first file extent item is replayed, the |
| 780 | * csum tree gets the following csum item: |
| 781 | * |
| 782 | * key (EXTENT_CSUM EXTENT_CSUM 12865536) itemsize 20 |
| 783 | * |
| 784 | * Which covers the 20K sub-range starting at offset 20K |
| 785 | * of our extent. Now when we replay the second file |
| 786 | * extent item, if we do not delete existing csum items |
| 787 | * that cover any of its blocks, we end up getting two |
| 788 | * csum items in our csum tree that overlap each other: |
| 789 | * |
| 790 | * key (EXTENT_CSUM EXTENT_CSUM 12845056) itemsize 100 |
| 791 | * key (EXTENT_CSUM EXTENT_CSUM 12865536) itemsize 20 |
| 792 | * |
| 793 | * Which is a problem, because after this anyone trying |
| 794 | * to lookup up for the checksum of any block of our |
| 795 | * extent starting at an offset of 40K or higher, will |
| 796 | * end up looking at the second csum item only, which |
| 797 | * does not contain the checksum for any block starting |
| 798 | * at offset 40K or higher of our extent. |
| 799 | */ |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 800 | while (!list_empty(&ordered_sums)) { |
| 801 | struct btrfs_ordered_sum *sums; |
| 802 | sums = list_entry(ordered_sums.next, |
| 803 | struct btrfs_ordered_sum, |
| 804 | list); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 805 | if (!ret) |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 806 | ret = btrfs_del_csums(trans, fs_info, |
Jeff Mahoney | 5b4aace | 2016-06-21 10:40:19 -0400 | [diff] [blame] | 807 | sums->bytenr, |
| 808 | sums->len); |
Filipe Manana | b84b839 | 2015-08-19 11:09:40 +0100 | [diff] [blame] | 809 | if (!ret) |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 810 | ret = btrfs_csum_file_blocks(trans, |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 811 | fs_info->csum_root, sums); |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 812 | list_del(&sums->list); |
| 813 | kfree(sums); |
| 814 | } |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 815 | if (ret) |
| 816 | goto out; |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 817 | } else { |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 818 | btrfs_release_path(path); |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 819 | } |
| 820 | } else if (found_type == BTRFS_FILE_EXTENT_INLINE) { |
| 821 | /* inline extents are easy, we just overwrite them */ |
| 822 | ret = overwrite_item(trans, root, path, eb, slot, key); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 823 | if (ret) |
| 824 | goto out; |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 825 | } |
| 826 | |
Josef Bacik | 4bc4bee | 2013-04-05 20:50:09 +0000 | [diff] [blame] | 827 | inode_add_bytes(inode, nbytes); |
Tsutomu Itoh | b995929 | 2012-06-25 21:25:22 -0600 | [diff] [blame] | 828 | ret = btrfs_update_inode(trans, root, inode); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 829 | out: |
| 830 | if (inode) |
| 831 | iput(inode); |
| 832 | return ret; |
| 833 | } |
| 834 | |
| 835 | /* |
| 836 | * when cleaning up conflicts between the directory names in the |
| 837 | * subvolume, directory names in the log and directory names in the |
| 838 | * inode back references, we may have to unlink inodes from directories. |
| 839 | * |
| 840 | * This is a helper function to do the unlink of a specific directory |
| 841 | * item |
| 842 | */ |
| 843 | static noinline int drop_one_dir_item(struct btrfs_trans_handle *trans, |
| 844 | struct btrfs_root *root, |
| 845 | struct btrfs_path *path, |
Nikolay Borisov | 207e7d9 | 2017-01-18 00:31:45 +0200 | [diff] [blame] | 846 | struct btrfs_inode *dir, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 847 | struct btrfs_dir_item *di) |
| 848 | { |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 849 | struct btrfs_fs_info *fs_info = root->fs_info; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 850 | struct inode *inode; |
| 851 | char *name; |
| 852 | int name_len; |
| 853 | struct extent_buffer *leaf; |
| 854 | struct btrfs_key location; |
| 855 | int ret; |
| 856 | |
| 857 | leaf = path->nodes[0]; |
| 858 | |
| 859 | btrfs_dir_item_key_to_cpu(leaf, di, &location); |
| 860 | name_len = btrfs_dir_name_len(leaf, di); |
| 861 | name = kmalloc(name_len, GFP_NOFS); |
liubo | 2a29edc | 2011-01-26 06:22:08 +0000 | [diff] [blame] | 862 | if (!name) |
| 863 | return -ENOMEM; |
| 864 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 865 | read_extent_buffer(leaf, name, (unsigned long)(di + 1), name_len); |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 866 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 867 | |
| 868 | inode = read_one_inode(root, location.objectid); |
Tsutomu Itoh | c00e949 | 2011-04-28 09:10:23 +0000 | [diff] [blame] | 869 | if (!inode) { |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 870 | ret = -EIO; |
| 871 | goto out; |
Tsutomu Itoh | c00e949 | 2011-04-28 09:10:23 +0000 | [diff] [blame] | 872 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 873 | |
Yan Zheng | ec051c0 | 2009-01-05 15:43:42 -0500 | [diff] [blame] | 874 | ret = link_to_fixup_dir(trans, root, path, location.objectid); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 875 | if (ret) |
| 876 | goto out; |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 877 | |
Nikolay Borisov | 207e7d9 | 2017-01-18 00:31:45 +0200 | [diff] [blame] | 878 | ret = btrfs_unlink_inode(trans, root, dir, BTRFS_I(inode), name, |
| 879 | name_len); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 880 | if (ret) |
| 881 | goto out; |
Filipe David Borba Manana | ada9af2 | 2013-08-05 09:25:47 +0100 | [diff] [blame] | 882 | else |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 883 | ret = btrfs_run_delayed_items(trans, fs_info); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 884 | out: |
| 885 | kfree(name); |
| 886 | iput(inode); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 887 | return ret; |
| 888 | } |
| 889 | |
| 890 | /* |
| 891 | * helper function to see if a given name and sequence number found |
| 892 | * in an inode back reference are already in a directory and correctly |
| 893 | * point to this inode |
| 894 | */ |
| 895 | static noinline int inode_in_dir(struct btrfs_root *root, |
| 896 | struct btrfs_path *path, |
| 897 | u64 dirid, u64 objectid, u64 index, |
| 898 | const char *name, int name_len) |
| 899 | { |
| 900 | struct btrfs_dir_item *di; |
| 901 | struct btrfs_key location; |
| 902 | int match = 0; |
| 903 | |
| 904 | di = btrfs_lookup_dir_index_item(NULL, root, path, dirid, |
| 905 | index, name, name_len, 0); |
| 906 | if (di && !IS_ERR(di)) { |
| 907 | btrfs_dir_item_key_to_cpu(path->nodes[0], di, &location); |
| 908 | if (location.objectid != objectid) |
| 909 | goto out; |
| 910 | } else |
| 911 | goto out; |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 912 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 913 | |
| 914 | di = btrfs_lookup_dir_item(NULL, root, path, dirid, name, name_len, 0); |
| 915 | if (di && !IS_ERR(di)) { |
| 916 | btrfs_dir_item_key_to_cpu(path->nodes[0], di, &location); |
| 917 | if (location.objectid != objectid) |
| 918 | goto out; |
| 919 | } else |
| 920 | goto out; |
| 921 | match = 1; |
| 922 | out: |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 923 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 924 | return match; |
| 925 | } |
| 926 | |
| 927 | /* |
| 928 | * helper function to check a log tree for a named back reference in |
| 929 | * an inode. This is used to decide if a back reference that is |
| 930 | * found in the subvolume conflicts with what we find in the log. |
| 931 | * |
| 932 | * inode backreferences may have multiple refs in a single item, |
| 933 | * during replay we process one reference at a time, and we don't |
| 934 | * want to delete valid links to a file from the subvolume if that |
| 935 | * link is also in the log. |
| 936 | */ |
| 937 | static noinline int backref_in_log(struct btrfs_root *log, |
| 938 | struct btrfs_key *key, |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 939 | u64 ref_objectid, |
Filipe Manana | df8d116 | 2015-01-14 01:52:25 +0000 | [diff] [blame] | 940 | const char *name, int namelen) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 941 | { |
| 942 | struct btrfs_path *path; |
| 943 | struct btrfs_inode_ref *ref; |
| 944 | unsigned long ptr; |
| 945 | unsigned long ptr_end; |
| 946 | unsigned long name_ptr; |
| 947 | int found_name_len; |
| 948 | int item_size; |
| 949 | int ret; |
| 950 | int match = 0; |
| 951 | |
| 952 | path = btrfs_alloc_path(); |
liubo | 2a29edc | 2011-01-26 06:22:08 +0000 | [diff] [blame] | 953 | if (!path) |
| 954 | return -ENOMEM; |
| 955 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 956 | ret = btrfs_search_slot(NULL, log, key, path, 0, 0); |
| 957 | if (ret != 0) |
| 958 | goto out; |
| 959 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 960 | ptr = btrfs_item_ptr_offset(path->nodes[0], path->slots[0]); |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 961 | |
| 962 | if (key->type == BTRFS_INODE_EXTREF_KEY) { |
| 963 | if (btrfs_find_name_in_ext_backref(path, ref_objectid, |
| 964 | name, namelen, NULL)) |
| 965 | match = 1; |
| 966 | |
| 967 | goto out; |
| 968 | } |
| 969 | |
| 970 | item_size = btrfs_item_size_nr(path->nodes[0], path->slots[0]); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 971 | ptr_end = ptr + item_size; |
| 972 | while (ptr < ptr_end) { |
| 973 | ref = (struct btrfs_inode_ref *)ptr; |
| 974 | found_name_len = btrfs_inode_ref_name_len(path->nodes[0], ref); |
| 975 | if (found_name_len == namelen) { |
| 976 | name_ptr = (unsigned long)(ref + 1); |
| 977 | ret = memcmp_extent_buffer(path->nodes[0], name, |
| 978 | name_ptr, namelen); |
| 979 | if (ret == 0) { |
| 980 | match = 1; |
| 981 | goto out; |
| 982 | } |
| 983 | } |
| 984 | ptr = (unsigned long)(ref + 1) + found_name_len; |
| 985 | } |
| 986 | out: |
| 987 | btrfs_free_path(path); |
| 988 | return match; |
| 989 | } |
| 990 | |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 991 | static inline int __add_inode_ref(struct btrfs_trans_handle *trans, |
| 992 | struct btrfs_root *root, |
| 993 | struct btrfs_path *path, |
| 994 | struct btrfs_root *log_root, |
Nikolay Borisov | 94c91a1 | 2017-01-18 00:31:46 +0200 | [diff] [blame] | 995 | struct btrfs_inode *dir, |
| 996 | struct btrfs_inode *inode, |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 997 | struct extent_buffer *eb, |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 998 | u64 inode_objectid, u64 parent_objectid, |
| 999 | u64 ref_index, char *name, int namelen, |
| 1000 | int *search_done) |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1001 | { |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 1002 | struct btrfs_fs_info *fs_info = root->fs_info; |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1003 | int ret; |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1004 | char *victim_name; |
| 1005 | int victim_name_len; |
| 1006 | struct extent_buffer *leaf; |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1007 | struct btrfs_dir_item *di; |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1008 | struct btrfs_key search_key; |
| 1009 | struct btrfs_inode_extref *extref; |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1010 | |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1011 | again: |
| 1012 | /* Search old style refs */ |
| 1013 | search_key.objectid = inode_objectid; |
| 1014 | search_key.type = BTRFS_INODE_REF_KEY; |
| 1015 | search_key.offset = parent_objectid; |
| 1016 | ret = btrfs_search_slot(NULL, root, &search_key, path, 0, 0); |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1017 | if (ret == 0) { |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1018 | struct btrfs_inode_ref *victim_ref; |
| 1019 | unsigned long ptr; |
| 1020 | unsigned long ptr_end; |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1021 | |
| 1022 | leaf = path->nodes[0]; |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1023 | |
| 1024 | /* are we trying to overwrite a back ref for the root directory |
| 1025 | * if so, just jump out, we're done |
| 1026 | */ |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1027 | if (search_key.objectid == search_key.offset) |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1028 | return 1; |
| 1029 | |
| 1030 | /* check all the names in this back reference to see |
| 1031 | * if they are in the log. if so, we allow them to stay |
| 1032 | * otherwise they must be unlinked as a conflict |
| 1033 | */ |
| 1034 | ptr = btrfs_item_ptr_offset(leaf, path->slots[0]); |
| 1035 | ptr_end = ptr + btrfs_item_size_nr(leaf, path->slots[0]); |
| 1036 | while (ptr < ptr_end) { |
| 1037 | victim_ref = (struct btrfs_inode_ref *)ptr; |
| 1038 | victim_name_len = btrfs_inode_ref_name_len(leaf, |
| 1039 | victim_ref); |
| 1040 | victim_name = kmalloc(victim_name_len, GFP_NOFS); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1041 | if (!victim_name) |
| 1042 | return -ENOMEM; |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1043 | |
| 1044 | read_extent_buffer(leaf, victim_name, |
| 1045 | (unsigned long)(victim_ref + 1), |
| 1046 | victim_name_len); |
| 1047 | |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1048 | if (!backref_in_log(log_root, &search_key, |
| 1049 | parent_objectid, |
| 1050 | victim_name, |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1051 | victim_name_len)) { |
Nikolay Borisov | 94c91a1 | 2017-01-18 00:31:46 +0200 | [diff] [blame] | 1052 | inc_nlink(&inode->vfs_inode); |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1053 | btrfs_release_path(path); |
| 1054 | |
Nikolay Borisov | 94c91a1 | 2017-01-18 00:31:46 +0200 | [diff] [blame] | 1055 | ret = btrfs_unlink_inode(trans, root, dir, inode, |
Nikolay Borisov | 4ec5934 | 2017-01-18 00:31:44 +0200 | [diff] [blame] | 1056 | victim_name, victim_name_len); |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1057 | kfree(victim_name); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1058 | if (ret) |
| 1059 | return ret; |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 1060 | ret = btrfs_run_delayed_items(trans, fs_info); |
Filipe David Borba Manana | ada9af2 | 2013-08-05 09:25:47 +0100 | [diff] [blame] | 1061 | if (ret) |
| 1062 | return ret; |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1063 | *search_done = 1; |
| 1064 | goto again; |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1065 | } |
| 1066 | kfree(victim_name); |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1067 | |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1068 | ptr = (unsigned long)(victim_ref + 1) + victim_name_len; |
| 1069 | } |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1070 | |
| 1071 | /* |
| 1072 | * NOTE: we have searched root tree and checked the |
Adam Buchbinder | bb7ab3b | 2016-03-04 11:23:12 -0800 | [diff] [blame] | 1073 | * corresponding ref, it does not need to check again. |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1074 | */ |
| 1075 | *search_done = 1; |
| 1076 | } |
| 1077 | btrfs_release_path(path); |
| 1078 | |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1079 | /* Same search but for extended refs */ |
| 1080 | extref = btrfs_lookup_inode_extref(NULL, root, path, name, namelen, |
| 1081 | inode_objectid, parent_objectid, 0, |
| 1082 | 0); |
| 1083 | if (!IS_ERR_OR_NULL(extref)) { |
| 1084 | u32 item_size; |
| 1085 | u32 cur_offset = 0; |
| 1086 | unsigned long base; |
| 1087 | struct inode *victim_parent; |
| 1088 | |
| 1089 | leaf = path->nodes[0]; |
| 1090 | |
| 1091 | item_size = btrfs_item_size_nr(leaf, path->slots[0]); |
| 1092 | base = btrfs_item_ptr_offset(leaf, path->slots[0]); |
| 1093 | |
| 1094 | while (cur_offset < item_size) { |
Quentin Casasnovas | dd9ef13 | 2015-03-03 16:31:38 +0100 | [diff] [blame] | 1095 | extref = (struct btrfs_inode_extref *)(base + cur_offset); |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1096 | |
| 1097 | victim_name_len = btrfs_inode_extref_name_len(leaf, extref); |
| 1098 | |
| 1099 | if (btrfs_inode_extref_parent(leaf, extref) != parent_objectid) |
| 1100 | goto next; |
| 1101 | |
| 1102 | victim_name = kmalloc(victim_name_len, GFP_NOFS); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1103 | if (!victim_name) |
| 1104 | return -ENOMEM; |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1105 | read_extent_buffer(leaf, victim_name, (unsigned long)&extref->name, |
| 1106 | victim_name_len); |
| 1107 | |
| 1108 | search_key.objectid = inode_objectid; |
| 1109 | search_key.type = BTRFS_INODE_EXTREF_KEY; |
| 1110 | search_key.offset = btrfs_extref_hash(parent_objectid, |
| 1111 | victim_name, |
| 1112 | victim_name_len); |
| 1113 | ret = 0; |
| 1114 | if (!backref_in_log(log_root, &search_key, |
| 1115 | parent_objectid, victim_name, |
| 1116 | victim_name_len)) { |
| 1117 | ret = -ENOENT; |
| 1118 | victim_parent = read_one_inode(root, |
Nikolay Borisov | 94c91a1 | 2017-01-18 00:31:46 +0200 | [diff] [blame] | 1119 | parent_objectid); |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1120 | if (victim_parent) { |
Nikolay Borisov | 94c91a1 | 2017-01-18 00:31:46 +0200 | [diff] [blame] | 1121 | inc_nlink(&inode->vfs_inode); |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1122 | btrfs_release_path(path); |
| 1123 | |
| 1124 | ret = btrfs_unlink_inode(trans, root, |
Nikolay Borisov | 4ec5934 | 2017-01-18 00:31:44 +0200 | [diff] [blame] | 1125 | BTRFS_I(victim_parent), |
Nikolay Borisov | 94c91a1 | 2017-01-18 00:31:46 +0200 | [diff] [blame] | 1126 | inode, |
Nikolay Borisov | 4ec5934 | 2017-01-18 00:31:44 +0200 | [diff] [blame] | 1127 | victim_name, |
| 1128 | victim_name_len); |
Filipe David Borba Manana | ada9af2 | 2013-08-05 09:25:47 +0100 | [diff] [blame] | 1129 | if (!ret) |
| 1130 | ret = btrfs_run_delayed_items( |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 1131 | trans, |
| 1132 | fs_info); |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1133 | } |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1134 | iput(victim_parent); |
| 1135 | kfree(victim_name); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1136 | if (ret) |
| 1137 | return ret; |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1138 | *search_done = 1; |
| 1139 | goto again; |
| 1140 | } |
| 1141 | kfree(victim_name); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1142 | if (ret) |
| 1143 | return ret; |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1144 | next: |
| 1145 | cur_offset += victim_name_len + sizeof(*extref); |
| 1146 | } |
| 1147 | *search_done = 1; |
| 1148 | } |
| 1149 | btrfs_release_path(path); |
| 1150 | |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1151 | /* look for a conflicting sequence number */ |
Nikolay Borisov | 94c91a1 | 2017-01-18 00:31:46 +0200 | [diff] [blame] | 1152 | di = btrfs_lookup_dir_index_item(trans, root, path, btrfs_ino(dir), |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1153 | ref_index, name, namelen, 0); |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1154 | if (di && !IS_ERR(di)) { |
Nikolay Borisov | 94c91a1 | 2017-01-18 00:31:46 +0200 | [diff] [blame] | 1155 | ret = drop_one_dir_item(trans, root, path, dir, di); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1156 | if (ret) |
| 1157 | return ret; |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1158 | } |
| 1159 | btrfs_release_path(path); |
| 1160 | |
| 1161 | /* look for a conflicing name */ |
Nikolay Borisov | 94c91a1 | 2017-01-18 00:31:46 +0200 | [diff] [blame] | 1162 | di = btrfs_lookup_dir_item(trans, root, path, btrfs_ino(dir), |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1163 | name, namelen, 0); |
| 1164 | if (di && !IS_ERR(di)) { |
Nikolay Borisov | 94c91a1 | 2017-01-18 00:31:46 +0200 | [diff] [blame] | 1165 | ret = drop_one_dir_item(trans, root, path, dir, di); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1166 | if (ret) |
| 1167 | return ret; |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1168 | } |
| 1169 | btrfs_release_path(path); |
| 1170 | |
| 1171 | return 0; |
| 1172 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1173 | |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1174 | static int extref_get_fields(struct extent_buffer *eb, unsigned long ref_ptr, |
| 1175 | u32 *namelen, char **name, u64 *index, |
| 1176 | u64 *parent_objectid) |
| 1177 | { |
| 1178 | struct btrfs_inode_extref *extref; |
| 1179 | |
| 1180 | extref = (struct btrfs_inode_extref *)ref_ptr; |
| 1181 | |
| 1182 | *namelen = btrfs_inode_extref_name_len(eb, extref); |
| 1183 | *name = kmalloc(*namelen, GFP_NOFS); |
| 1184 | if (*name == NULL) |
| 1185 | return -ENOMEM; |
| 1186 | |
| 1187 | read_extent_buffer(eb, *name, (unsigned long)&extref->name, |
| 1188 | *namelen); |
| 1189 | |
| 1190 | *index = btrfs_inode_extref_index(eb, extref); |
| 1191 | if (parent_objectid) |
| 1192 | *parent_objectid = btrfs_inode_extref_parent(eb, extref); |
| 1193 | |
| 1194 | return 0; |
| 1195 | } |
| 1196 | |
| 1197 | static int ref_get_fields(struct extent_buffer *eb, unsigned long ref_ptr, |
| 1198 | u32 *namelen, char **name, u64 *index) |
| 1199 | { |
| 1200 | struct btrfs_inode_ref *ref; |
| 1201 | |
| 1202 | ref = (struct btrfs_inode_ref *)ref_ptr; |
| 1203 | |
| 1204 | *namelen = btrfs_inode_ref_name_len(eb, ref); |
| 1205 | *name = kmalloc(*namelen, GFP_NOFS); |
| 1206 | if (*name == NULL) |
| 1207 | return -ENOMEM; |
| 1208 | |
| 1209 | read_extent_buffer(eb, *name, (unsigned long)(ref + 1), *namelen); |
| 1210 | |
| 1211 | *index = btrfs_inode_ref_index(eb, ref); |
| 1212 | |
| 1213 | return 0; |
| 1214 | } |
| 1215 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1216 | /* |
| 1217 | * replay one inode back reference item found in the log tree. |
| 1218 | * eb, slot and key refer to the buffer and key found in the log tree. |
| 1219 | * root is the destination we are replaying into, and path is for temp |
| 1220 | * use by this function. (it should be released on return). |
| 1221 | */ |
| 1222 | static noinline int add_inode_ref(struct btrfs_trans_handle *trans, |
| 1223 | struct btrfs_root *root, |
| 1224 | struct btrfs_root *log, |
| 1225 | struct btrfs_path *path, |
| 1226 | struct extent_buffer *eb, int slot, |
| 1227 | struct btrfs_key *key) |
| 1228 | { |
Geyslan G. Bem | 03b2f08 | 2013-10-11 15:35:45 -0300 | [diff] [blame] | 1229 | struct inode *dir = NULL; |
| 1230 | struct inode *inode = NULL; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1231 | unsigned long ref_ptr; |
| 1232 | unsigned long ref_end; |
Geyslan G. Bem | 03b2f08 | 2013-10-11 15:35:45 -0300 | [diff] [blame] | 1233 | char *name = NULL; |
liubo | 34f3e4f | 2011-08-06 08:35:23 +0000 | [diff] [blame] | 1234 | int namelen; |
| 1235 | int ret; |
liubo | c622ae6 | 2011-03-26 08:01:12 -0400 | [diff] [blame] | 1236 | int search_done = 0; |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1237 | int log_ref_ver = 0; |
| 1238 | u64 parent_objectid; |
| 1239 | u64 inode_objectid; |
Chris Mason | f46dbe3 | 2012-10-09 11:17:20 -0400 | [diff] [blame] | 1240 | u64 ref_index = 0; |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1241 | int ref_struct_size; |
| 1242 | |
| 1243 | ref_ptr = btrfs_item_ptr_offset(eb, slot); |
| 1244 | ref_end = ref_ptr + btrfs_item_size_nr(eb, slot); |
| 1245 | |
| 1246 | if (key->type == BTRFS_INODE_EXTREF_KEY) { |
| 1247 | struct btrfs_inode_extref *r; |
| 1248 | |
| 1249 | ref_struct_size = sizeof(struct btrfs_inode_extref); |
| 1250 | log_ref_ver = 1; |
| 1251 | r = (struct btrfs_inode_extref *)ref_ptr; |
| 1252 | parent_objectid = btrfs_inode_extref_parent(eb, r); |
| 1253 | } else { |
| 1254 | ref_struct_size = sizeof(struct btrfs_inode_ref); |
| 1255 | parent_objectid = key->offset; |
| 1256 | } |
| 1257 | inode_objectid = key->objectid; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1258 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1259 | /* |
| 1260 | * it is possible that we didn't log all the parent directories |
| 1261 | * for a given inode. If we don't find the dir, just don't |
| 1262 | * copy the back ref in. The link count fixup code will take |
| 1263 | * care of the rest |
| 1264 | */ |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1265 | dir = read_one_inode(root, parent_objectid); |
Geyslan G. Bem | 03b2f08 | 2013-10-11 15:35:45 -0300 | [diff] [blame] | 1266 | if (!dir) { |
| 1267 | ret = -ENOENT; |
| 1268 | goto out; |
| 1269 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1270 | |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1271 | inode = read_one_inode(root, inode_objectid); |
Tsutomu Itoh | c00e949 | 2011-04-28 09:10:23 +0000 | [diff] [blame] | 1272 | if (!inode) { |
Geyslan G. Bem | 03b2f08 | 2013-10-11 15:35:45 -0300 | [diff] [blame] | 1273 | ret = -EIO; |
| 1274 | goto out; |
Tsutomu Itoh | c00e949 | 2011-04-28 09:10:23 +0000 | [diff] [blame] | 1275 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1276 | |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1277 | while (ref_ptr < ref_end) { |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1278 | if (log_ref_ver) { |
| 1279 | ret = extref_get_fields(eb, ref_ptr, &namelen, &name, |
| 1280 | &ref_index, &parent_objectid); |
| 1281 | /* |
| 1282 | * parent object can change from one array |
| 1283 | * item to another. |
| 1284 | */ |
| 1285 | if (!dir) |
| 1286 | dir = read_one_inode(root, parent_objectid); |
Geyslan G. Bem | 03b2f08 | 2013-10-11 15:35:45 -0300 | [diff] [blame] | 1287 | if (!dir) { |
| 1288 | ret = -ENOENT; |
| 1289 | goto out; |
| 1290 | } |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1291 | } else { |
| 1292 | ret = ref_get_fields(eb, ref_ptr, &namelen, &name, |
| 1293 | &ref_index); |
| 1294 | } |
| 1295 | if (ret) |
Geyslan G. Bem | 03b2f08 | 2013-10-11 15:35:45 -0300 | [diff] [blame] | 1296 | goto out; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1297 | |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1298 | /* if we already have a perfect match, we're done */ |
Nikolay Borisov | 4a0cc7c | 2017-01-10 20:35:31 +0200 | [diff] [blame] | 1299 | if (!inode_in_dir(root, path, btrfs_ino(BTRFS_I(dir)), btrfs_ino(BTRFS_I(inode)), |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1300 | ref_index, name, namelen)) { |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1301 | /* |
| 1302 | * look for a conflicting back reference in the |
| 1303 | * metadata. if we find one we have to unlink that name |
| 1304 | * of the file before we add our new link. Later on, we |
| 1305 | * overwrite any existing back reference, and we don't |
| 1306 | * want to create dangling pointers in the directory. |
| 1307 | */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1308 | |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1309 | if (!search_done) { |
| 1310 | ret = __add_inode_ref(trans, root, path, log, |
Nikolay Borisov | 94c91a1 | 2017-01-18 00:31:46 +0200 | [diff] [blame] | 1311 | BTRFS_I(dir), |
| 1312 | BTRFS_I(inode), eb, |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1313 | inode_objectid, |
| 1314 | parent_objectid, |
| 1315 | ref_index, name, namelen, |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1316 | &search_done); |
Geyslan G. Bem | 03b2f08 | 2013-10-11 15:35:45 -0300 | [diff] [blame] | 1317 | if (ret) { |
| 1318 | if (ret == 1) |
| 1319 | ret = 0; |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1320 | goto out; |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1321 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1322 | } |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1323 | |
| 1324 | /* insert our name */ |
| 1325 | ret = btrfs_add_link(trans, dir, inode, name, namelen, |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1326 | 0, ref_index); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1327 | if (ret) |
| 1328 | goto out; |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1329 | |
| 1330 | btrfs_update_inode(trans, root, inode); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1331 | } |
liubo | c622ae6 | 2011-03-26 08:01:12 -0400 | [diff] [blame] | 1332 | |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1333 | ref_ptr = (unsigned long)(ref_ptr + ref_struct_size) + namelen; |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1334 | kfree(name); |
Geyslan G. Bem | 03b2f08 | 2013-10-11 15:35:45 -0300 | [diff] [blame] | 1335 | name = NULL; |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1336 | if (log_ref_ver) { |
| 1337 | iput(dir); |
| 1338 | dir = NULL; |
| 1339 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1340 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1341 | |
| 1342 | /* finally write the back reference in the inode */ |
| 1343 | ret = overwrite_item(trans, root, path, eb, slot, key); |
Jan Schmidt | 5a1d784 | 2012-08-17 14:04:41 -0700 | [diff] [blame] | 1344 | out: |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 1345 | btrfs_release_path(path); |
Geyslan G. Bem | 03b2f08 | 2013-10-11 15:35:45 -0300 | [diff] [blame] | 1346 | kfree(name); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1347 | iput(dir); |
| 1348 | iput(inode); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1349 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1350 | } |
| 1351 | |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 1352 | static int insert_orphan_item(struct btrfs_trans_handle *trans, |
David Sterba | 9c4f61f | 2015-01-02 19:12:57 +0100 | [diff] [blame] | 1353 | struct btrfs_root *root, u64 ino) |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 1354 | { |
| 1355 | int ret; |
David Sterba | 381cf65 | 2015-01-02 18:45:16 +0100 | [diff] [blame] | 1356 | |
David Sterba | 9c4f61f | 2015-01-02 19:12:57 +0100 | [diff] [blame] | 1357 | ret = btrfs_insert_orphan_item(trans, root, ino); |
| 1358 | if (ret == -EEXIST) |
| 1359 | ret = 0; |
David Sterba | 381cf65 | 2015-01-02 18:45:16 +0100 | [diff] [blame] | 1360 | |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 1361 | return ret; |
| 1362 | } |
| 1363 | |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1364 | static int count_inode_extrefs(struct btrfs_root *root, |
| 1365 | struct inode *inode, struct btrfs_path *path) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1366 | { |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1367 | int ret = 0; |
| 1368 | int name_len; |
| 1369 | unsigned int nlink = 0; |
| 1370 | u32 item_size; |
| 1371 | u32 cur_offset = 0; |
Nikolay Borisov | 4a0cc7c | 2017-01-10 20:35:31 +0200 | [diff] [blame] | 1372 | u64 inode_objectid = btrfs_ino(BTRFS_I(inode)); |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1373 | u64 offset = 0; |
| 1374 | unsigned long ptr; |
| 1375 | struct btrfs_inode_extref *extref; |
| 1376 | struct extent_buffer *leaf; |
| 1377 | |
| 1378 | while (1) { |
| 1379 | ret = btrfs_find_one_extref(root, inode_objectid, offset, path, |
| 1380 | &extref, &offset); |
| 1381 | if (ret) |
| 1382 | break; |
| 1383 | |
| 1384 | leaf = path->nodes[0]; |
| 1385 | item_size = btrfs_item_size_nr(leaf, path->slots[0]); |
| 1386 | ptr = btrfs_item_ptr_offset(leaf, path->slots[0]); |
Filipe Manana | 2c2c452 | 2015-01-13 16:40:04 +0000 | [diff] [blame] | 1387 | cur_offset = 0; |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1388 | |
| 1389 | while (cur_offset < item_size) { |
| 1390 | extref = (struct btrfs_inode_extref *) (ptr + cur_offset); |
| 1391 | name_len = btrfs_inode_extref_name_len(leaf, extref); |
| 1392 | |
| 1393 | nlink++; |
| 1394 | |
| 1395 | cur_offset += name_len + sizeof(*extref); |
| 1396 | } |
| 1397 | |
| 1398 | offset++; |
| 1399 | btrfs_release_path(path); |
| 1400 | } |
| 1401 | btrfs_release_path(path); |
| 1402 | |
Filipe Manana | 2c2c452 | 2015-01-13 16:40:04 +0000 | [diff] [blame] | 1403 | if (ret < 0 && ret != -ENOENT) |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1404 | return ret; |
| 1405 | return nlink; |
| 1406 | } |
| 1407 | |
| 1408 | static int count_inode_refs(struct btrfs_root *root, |
| 1409 | struct inode *inode, struct btrfs_path *path) |
| 1410 | { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1411 | int ret; |
| 1412 | struct btrfs_key key; |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1413 | unsigned int nlink = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1414 | unsigned long ptr; |
| 1415 | unsigned long ptr_end; |
| 1416 | int name_len; |
Nikolay Borisov | 4a0cc7c | 2017-01-10 20:35:31 +0200 | [diff] [blame] | 1417 | u64 ino = btrfs_ino(BTRFS_I(inode)); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1418 | |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 1419 | key.objectid = ino; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1420 | key.type = BTRFS_INODE_REF_KEY; |
| 1421 | key.offset = (u64)-1; |
| 1422 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1423 | while (1) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1424 | ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); |
| 1425 | if (ret < 0) |
| 1426 | break; |
| 1427 | if (ret > 0) { |
| 1428 | if (path->slots[0] == 0) |
| 1429 | break; |
| 1430 | path->slots[0]--; |
| 1431 | } |
Filipe David Borba Manana | e93ae26 | 2013-10-14 22:49:11 +0100 | [diff] [blame] | 1432 | process_slot: |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1433 | btrfs_item_key_to_cpu(path->nodes[0], &key, |
| 1434 | path->slots[0]); |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 1435 | if (key.objectid != ino || |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1436 | key.type != BTRFS_INODE_REF_KEY) |
| 1437 | break; |
| 1438 | ptr = btrfs_item_ptr_offset(path->nodes[0], path->slots[0]); |
| 1439 | ptr_end = ptr + btrfs_item_size_nr(path->nodes[0], |
| 1440 | path->slots[0]); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1441 | while (ptr < ptr_end) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1442 | struct btrfs_inode_ref *ref; |
| 1443 | |
| 1444 | ref = (struct btrfs_inode_ref *)ptr; |
| 1445 | name_len = btrfs_inode_ref_name_len(path->nodes[0], |
| 1446 | ref); |
| 1447 | ptr = (unsigned long)(ref + 1) + name_len; |
| 1448 | nlink++; |
| 1449 | } |
| 1450 | |
| 1451 | if (key.offset == 0) |
| 1452 | break; |
Filipe David Borba Manana | e93ae26 | 2013-10-14 22:49:11 +0100 | [diff] [blame] | 1453 | if (path->slots[0] > 0) { |
| 1454 | path->slots[0]--; |
| 1455 | goto process_slot; |
| 1456 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1457 | key.offset--; |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 1458 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1459 | } |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 1460 | btrfs_release_path(path); |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1461 | |
| 1462 | return nlink; |
| 1463 | } |
| 1464 | |
| 1465 | /* |
| 1466 | * There are a few corners where the link count of the file can't |
| 1467 | * be properly maintained during replay. So, instead of adding |
| 1468 | * lots of complexity to the log code, we just scan the backrefs |
| 1469 | * for any file that has been through replay. |
| 1470 | * |
| 1471 | * The scan will update the link count on the inode to reflect the |
| 1472 | * number of back refs found. If it goes down to zero, the iput |
| 1473 | * will free the inode. |
| 1474 | */ |
| 1475 | static noinline int fixup_inode_link_count(struct btrfs_trans_handle *trans, |
| 1476 | struct btrfs_root *root, |
| 1477 | struct inode *inode) |
| 1478 | { |
| 1479 | struct btrfs_path *path; |
| 1480 | int ret; |
| 1481 | u64 nlink = 0; |
Nikolay Borisov | 4a0cc7c | 2017-01-10 20:35:31 +0200 | [diff] [blame] | 1482 | u64 ino = btrfs_ino(BTRFS_I(inode)); |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1483 | |
| 1484 | path = btrfs_alloc_path(); |
| 1485 | if (!path) |
| 1486 | return -ENOMEM; |
| 1487 | |
| 1488 | ret = count_inode_refs(root, inode, path); |
| 1489 | if (ret < 0) |
| 1490 | goto out; |
| 1491 | |
| 1492 | nlink = ret; |
| 1493 | |
| 1494 | ret = count_inode_extrefs(root, inode, path); |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1495 | if (ret < 0) |
| 1496 | goto out; |
| 1497 | |
| 1498 | nlink += ret; |
| 1499 | |
| 1500 | ret = 0; |
| 1501 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1502 | if (nlink != inode->i_nlink) { |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 1503 | set_nlink(inode, nlink); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1504 | btrfs_update_inode(trans, root, inode); |
| 1505 | } |
Chris Mason | 8d5bf1c | 2008-09-11 15:51:21 -0400 | [diff] [blame] | 1506 | BTRFS_I(inode)->index_cnt = (u64)-1; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1507 | |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 1508 | if (inode->i_nlink == 0) { |
| 1509 | if (S_ISDIR(inode->i_mode)) { |
| 1510 | ret = replay_dir_deletes(trans, root, NULL, path, |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 1511 | ino, 1); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1512 | if (ret) |
| 1513 | goto out; |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 1514 | } |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 1515 | ret = insert_orphan_item(trans, root, ino); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 1516 | } |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 1517 | |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 1518 | out: |
| 1519 | btrfs_free_path(path); |
| 1520 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1521 | } |
| 1522 | |
| 1523 | static noinline int fixup_inode_link_counts(struct btrfs_trans_handle *trans, |
| 1524 | struct btrfs_root *root, |
| 1525 | struct btrfs_path *path) |
| 1526 | { |
| 1527 | int ret; |
| 1528 | struct btrfs_key key; |
| 1529 | struct inode *inode; |
| 1530 | |
| 1531 | key.objectid = BTRFS_TREE_LOG_FIXUP_OBJECTID; |
| 1532 | key.type = BTRFS_ORPHAN_ITEM_KEY; |
| 1533 | key.offset = (u64)-1; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1534 | while (1) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1535 | ret = btrfs_search_slot(trans, root, &key, path, -1, 1); |
| 1536 | if (ret < 0) |
| 1537 | break; |
| 1538 | |
| 1539 | if (ret == 1) { |
| 1540 | if (path->slots[0] == 0) |
| 1541 | break; |
| 1542 | path->slots[0]--; |
| 1543 | } |
| 1544 | |
| 1545 | btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]); |
| 1546 | if (key.objectid != BTRFS_TREE_LOG_FIXUP_OBJECTID || |
| 1547 | key.type != BTRFS_ORPHAN_ITEM_KEY) |
| 1548 | break; |
| 1549 | |
| 1550 | ret = btrfs_del_item(trans, root, path); |
Tsutomu Itoh | 65a246c | 2011-05-19 04:37:44 +0000 | [diff] [blame] | 1551 | if (ret) |
| 1552 | goto out; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1553 | |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 1554 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1555 | inode = read_one_inode(root, key.offset); |
Tsutomu Itoh | c00e949 | 2011-04-28 09:10:23 +0000 | [diff] [blame] | 1556 | if (!inode) |
| 1557 | return -EIO; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1558 | |
| 1559 | ret = fixup_inode_link_count(trans, root, inode); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1560 | iput(inode); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1561 | if (ret) |
| 1562 | goto out; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1563 | |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 1564 | /* |
| 1565 | * fixup on a directory may create new entries, |
| 1566 | * make sure we always look for the highset possible |
| 1567 | * offset |
| 1568 | */ |
| 1569 | key.offset = (u64)-1; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1570 | } |
Tsutomu Itoh | 65a246c | 2011-05-19 04:37:44 +0000 | [diff] [blame] | 1571 | ret = 0; |
| 1572 | out: |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 1573 | btrfs_release_path(path); |
Tsutomu Itoh | 65a246c | 2011-05-19 04:37:44 +0000 | [diff] [blame] | 1574 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1575 | } |
| 1576 | |
| 1577 | |
| 1578 | /* |
| 1579 | * record a given inode in the fixup dir so we can check its link |
| 1580 | * count when replay is done. The link count is incremented here |
| 1581 | * so the inode won't go away until we check it |
| 1582 | */ |
| 1583 | static noinline int link_to_fixup_dir(struct btrfs_trans_handle *trans, |
| 1584 | struct btrfs_root *root, |
| 1585 | struct btrfs_path *path, |
| 1586 | u64 objectid) |
| 1587 | { |
| 1588 | struct btrfs_key key; |
| 1589 | int ret = 0; |
| 1590 | struct inode *inode; |
| 1591 | |
| 1592 | inode = read_one_inode(root, objectid); |
Tsutomu Itoh | c00e949 | 2011-04-28 09:10:23 +0000 | [diff] [blame] | 1593 | if (!inode) |
| 1594 | return -EIO; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1595 | |
| 1596 | key.objectid = BTRFS_TREE_LOG_FIXUP_OBJECTID; |
David Sterba | 962a298 | 2014-06-04 18:41:45 +0200 | [diff] [blame] | 1597 | key.type = BTRFS_ORPHAN_ITEM_KEY; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1598 | key.offset = objectid; |
| 1599 | |
| 1600 | ret = btrfs_insert_empty_item(trans, root, path, &key, 0); |
| 1601 | |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 1602 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1603 | if (ret == 0) { |
Josef Bacik | 9bf7a48 | 2013-03-01 13:35:47 -0500 | [diff] [blame] | 1604 | if (!inode->i_nlink) |
| 1605 | set_nlink(inode, 1); |
| 1606 | else |
Zach Brown | 8b558c5 | 2013-10-16 12:10:34 -0700 | [diff] [blame] | 1607 | inc_nlink(inode); |
Tsutomu Itoh | b995929 | 2012-06-25 21:25:22 -0600 | [diff] [blame] | 1608 | ret = btrfs_update_inode(trans, root, inode); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1609 | } else if (ret == -EEXIST) { |
| 1610 | ret = 0; |
| 1611 | } else { |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1612 | BUG(); /* Logic Error */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1613 | } |
| 1614 | iput(inode); |
| 1615 | |
| 1616 | return ret; |
| 1617 | } |
| 1618 | |
| 1619 | /* |
| 1620 | * when replaying the log for a directory, we only insert names |
| 1621 | * for inodes that actually exist. This means an fsync on a directory |
| 1622 | * does not implicitly fsync all the new files in it |
| 1623 | */ |
| 1624 | static noinline int insert_one_name(struct btrfs_trans_handle *trans, |
| 1625 | struct btrfs_root *root, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1626 | u64 dirid, u64 index, |
Zhaolei | 60d53eb | 2015-08-17 18:44:46 +0800 | [diff] [blame] | 1627 | char *name, int name_len, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1628 | struct btrfs_key *location) |
| 1629 | { |
| 1630 | struct inode *inode; |
| 1631 | struct inode *dir; |
| 1632 | int ret; |
| 1633 | |
| 1634 | inode = read_one_inode(root, location->objectid); |
| 1635 | if (!inode) |
| 1636 | return -ENOENT; |
| 1637 | |
| 1638 | dir = read_one_inode(root, dirid); |
| 1639 | if (!dir) { |
| 1640 | iput(inode); |
| 1641 | return -EIO; |
| 1642 | } |
Josef Bacik | d555438 | 2013-09-11 14:17:00 -0400 | [diff] [blame] | 1643 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1644 | ret = btrfs_add_link(trans, dir, inode, name, name_len, 1, index); |
| 1645 | |
| 1646 | /* FIXME, put inode into FIXUP list */ |
| 1647 | |
| 1648 | iput(inode); |
| 1649 | iput(dir); |
| 1650 | return ret; |
| 1651 | } |
| 1652 | |
| 1653 | /* |
Filipe Manana | df8d116 | 2015-01-14 01:52:25 +0000 | [diff] [blame] | 1654 | * Return true if an inode reference exists in the log for the given name, |
| 1655 | * inode and parent inode. |
| 1656 | */ |
| 1657 | static bool name_in_log_ref(struct btrfs_root *log_root, |
| 1658 | const char *name, const int name_len, |
| 1659 | const u64 dirid, const u64 ino) |
| 1660 | { |
| 1661 | struct btrfs_key search_key; |
| 1662 | |
| 1663 | search_key.objectid = ino; |
| 1664 | search_key.type = BTRFS_INODE_REF_KEY; |
| 1665 | search_key.offset = dirid; |
| 1666 | if (backref_in_log(log_root, &search_key, dirid, name, name_len)) |
| 1667 | return true; |
| 1668 | |
| 1669 | search_key.type = BTRFS_INODE_EXTREF_KEY; |
| 1670 | search_key.offset = btrfs_extref_hash(dirid, name, name_len); |
| 1671 | if (backref_in_log(log_root, &search_key, dirid, name, name_len)) |
| 1672 | return true; |
| 1673 | |
| 1674 | return false; |
| 1675 | } |
| 1676 | |
| 1677 | /* |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1678 | * take a single entry in a log directory item and replay it into |
| 1679 | * the subvolume. |
| 1680 | * |
| 1681 | * if a conflicting item exists in the subdirectory already, |
| 1682 | * the inode it points to is unlinked and put into the link count |
| 1683 | * fix up tree. |
| 1684 | * |
| 1685 | * If a name from the log points to a file or directory that does |
| 1686 | * not exist in the FS, it is skipped. fsyncs on directories |
| 1687 | * do not force down inodes inside that directory, just changes to the |
| 1688 | * names or unlinks in a directory. |
Filipe Manana | bb53eda | 2015-07-15 23:26:43 +0100 | [diff] [blame] | 1689 | * |
| 1690 | * Returns < 0 on error, 0 if the name wasn't replayed (dentry points to a |
| 1691 | * non-existing inode) and 1 if the name was replayed. |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1692 | */ |
| 1693 | static noinline int replay_one_name(struct btrfs_trans_handle *trans, |
| 1694 | struct btrfs_root *root, |
| 1695 | struct btrfs_path *path, |
| 1696 | struct extent_buffer *eb, |
| 1697 | struct btrfs_dir_item *di, |
| 1698 | struct btrfs_key *key) |
| 1699 | { |
| 1700 | char *name; |
| 1701 | int name_len; |
| 1702 | struct btrfs_dir_item *dst_di; |
| 1703 | struct btrfs_key found_key; |
| 1704 | struct btrfs_key log_key; |
| 1705 | struct inode *dir; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1706 | u8 log_type; |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 1707 | int exists; |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1708 | int ret = 0; |
Josef Bacik | d555438 | 2013-09-11 14:17:00 -0400 | [diff] [blame] | 1709 | bool update_size = (key->type == BTRFS_DIR_INDEX_KEY); |
Filipe Manana | bb53eda | 2015-07-15 23:26:43 +0100 | [diff] [blame] | 1710 | bool name_added = false; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1711 | |
| 1712 | dir = read_one_inode(root, key->objectid); |
Tsutomu Itoh | c00e949 | 2011-04-28 09:10:23 +0000 | [diff] [blame] | 1713 | if (!dir) |
| 1714 | return -EIO; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1715 | |
| 1716 | name_len = btrfs_dir_name_len(eb, di); |
| 1717 | name = kmalloc(name_len, GFP_NOFS); |
Filipe David Borba Manana | 2bac325 | 2013-08-04 19:58:57 +0100 | [diff] [blame] | 1718 | if (!name) { |
| 1719 | ret = -ENOMEM; |
| 1720 | goto out; |
| 1721 | } |
liubo | 2a29edc | 2011-01-26 06:22:08 +0000 | [diff] [blame] | 1722 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1723 | log_type = btrfs_dir_type(eb, di); |
| 1724 | read_extent_buffer(eb, name, (unsigned long)(di + 1), |
| 1725 | name_len); |
| 1726 | |
| 1727 | btrfs_dir_item_key_to_cpu(eb, di, &log_key); |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 1728 | exists = btrfs_lookup_inode(trans, root, path, &log_key, 0); |
| 1729 | if (exists == 0) |
| 1730 | exists = 1; |
| 1731 | else |
| 1732 | exists = 0; |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 1733 | btrfs_release_path(path); |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 1734 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1735 | if (key->type == BTRFS_DIR_ITEM_KEY) { |
| 1736 | dst_di = btrfs_lookup_dir_item(trans, root, path, key->objectid, |
| 1737 | name, name_len, 1); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1738 | } else if (key->type == BTRFS_DIR_INDEX_KEY) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1739 | dst_di = btrfs_lookup_dir_index_item(trans, root, path, |
| 1740 | key->objectid, |
| 1741 | key->offset, name, |
| 1742 | name_len, 1); |
| 1743 | } else { |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1744 | /* Corruption */ |
| 1745 | ret = -EINVAL; |
| 1746 | goto out; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1747 | } |
David Sterba | c704005 | 2011-04-19 18:00:01 +0200 | [diff] [blame] | 1748 | if (IS_ERR_OR_NULL(dst_di)) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1749 | /* we need a sequence number to insert, so we only |
| 1750 | * do inserts for the BTRFS_DIR_INDEX_KEY types |
| 1751 | */ |
| 1752 | if (key->type != BTRFS_DIR_INDEX_KEY) |
| 1753 | goto out; |
| 1754 | goto insert; |
| 1755 | } |
| 1756 | |
| 1757 | btrfs_dir_item_key_to_cpu(path->nodes[0], dst_di, &found_key); |
| 1758 | /* the existing item matches the logged item */ |
| 1759 | if (found_key.objectid == log_key.objectid && |
| 1760 | found_key.type == log_key.type && |
| 1761 | found_key.offset == log_key.offset && |
| 1762 | btrfs_dir_type(path->nodes[0], dst_di) == log_type) { |
Filipe Manana | a2cc11d | 2014-09-08 22:53:18 +0100 | [diff] [blame] | 1763 | update_size = false; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1764 | goto out; |
| 1765 | } |
| 1766 | |
| 1767 | /* |
| 1768 | * don't drop the conflicting directory entry if the inode |
| 1769 | * for the new entry doesn't exist |
| 1770 | */ |
Chris Mason | 4bef084 | 2008-09-08 11:18:08 -0400 | [diff] [blame] | 1771 | if (!exists) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1772 | goto out; |
| 1773 | |
Nikolay Borisov | 207e7d9 | 2017-01-18 00:31:45 +0200 | [diff] [blame] | 1774 | ret = drop_one_dir_item(trans, root, path, BTRFS_I(dir), dst_di); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1775 | if (ret) |
| 1776 | goto out; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1777 | |
| 1778 | if (key->type == BTRFS_DIR_INDEX_KEY) |
| 1779 | goto insert; |
| 1780 | out: |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 1781 | btrfs_release_path(path); |
Josef Bacik | d555438 | 2013-09-11 14:17:00 -0400 | [diff] [blame] | 1782 | if (!ret && update_size) { |
| 1783 | btrfs_i_size_write(dir, dir->i_size + name_len * 2); |
| 1784 | ret = btrfs_update_inode(trans, root, dir); |
| 1785 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1786 | kfree(name); |
| 1787 | iput(dir); |
Filipe Manana | bb53eda | 2015-07-15 23:26:43 +0100 | [diff] [blame] | 1788 | if (!ret && name_added) |
| 1789 | ret = 1; |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1790 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1791 | |
| 1792 | insert: |
Filipe Manana | df8d116 | 2015-01-14 01:52:25 +0000 | [diff] [blame] | 1793 | if (name_in_log_ref(root->log_root, name, name_len, |
| 1794 | key->objectid, log_key.objectid)) { |
| 1795 | /* The dentry will be added later. */ |
| 1796 | ret = 0; |
| 1797 | update_size = false; |
| 1798 | goto out; |
| 1799 | } |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 1800 | btrfs_release_path(path); |
Zhaolei | 60d53eb | 2015-08-17 18:44:46 +0800 | [diff] [blame] | 1801 | ret = insert_one_name(trans, root, key->objectid, key->offset, |
| 1802 | name, name_len, &log_key); |
Filipe Manana | df8d116 | 2015-01-14 01:52:25 +0000 | [diff] [blame] | 1803 | if (ret && ret != -ENOENT && ret != -EEXIST) |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1804 | goto out; |
Filipe Manana | bb53eda | 2015-07-15 23:26:43 +0100 | [diff] [blame] | 1805 | if (!ret) |
| 1806 | name_added = true; |
Josef Bacik | d555438 | 2013-09-11 14:17:00 -0400 | [diff] [blame] | 1807 | update_size = false; |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 1808 | ret = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1809 | goto out; |
| 1810 | } |
| 1811 | |
| 1812 | /* |
| 1813 | * find all the names in a directory item and reconcile them into |
| 1814 | * the subvolume. Only BTRFS_DIR_ITEM_KEY types will have more than |
| 1815 | * one name in a directory item, but the same code gets used for |
| 1816 | * both directory index types |
| 1817 | */ |
| 1818 | static noinline int replay_one_dir_item(struct btrfs_trans_handle *trans, |
| 1819 | struct btrfs_root *root, |
| 1820 | struct btrfs_path *path, |
| 1821 | struct extent_buffer *eb, int slot, |
| 1822 | struct btrfs_key *key) |
| 1823 | { |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 1824 | struct btrfs_fs_info *fs_info = root->fs_info; |
Filipe Manana | bb53eda | 2015-07-15 23:26:43 +0100 | [diff] [blame] | 1825 | int ret = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1826 | u32 item_size = btrfs_item_size_nr(eb, slot); |
| 1827 | struct btrfs_dir_item *di; |
| 1828 | int name_len; |
| 1829 | unsigned long ptr; |
| 1830 | unsigned long ptr_end; |
Filipe Manana | bb53eda | 2015-07-15 23:26:43 +0100 | [diff] [blame] | 1831 | struct btrfs_path *fixup_path = NULL; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1832 | |
| 1833 | ptr = btrfs_item_ptr_offset(eb, slot); |
| 1834 | ptr_end = ptr + item_size; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 1835 | while (ptr < ptr_end) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1836 | di = (struct btrfs_dir_item *)ptr; |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 1837 | if (verify_dir_item(fs_info, eb, di)) |
Josef Bacik | 22a94d4 | 2011-03-16 16:47:17 -0400 | [diff] [blame] | 1838 | return -EIO; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1839 | name_len = btrfs_dir_name_len(eb, di); |
| 1840 | ret = replay_one_name(trans, root, path, eb, di, key); |
Filipe Manana | bb53eda | 2015-07-15 23:26:43 +0100 | [diff] [blame] | 1841 | if (ret < 0) |
| 1842 | break; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1843 | ptr = (unsigned long)(di + 1); |
| 1844 | ptr += name_len; |
Filipe Manana | bb53eda | 2015-07-15 23:26:43 +0100 | [diff] [blame] | 1845 | |
| 1846 | /* |
| 1847 | * If this entry refers to a non-directory (directories can not |
| 1848 | * have a link count > 1) and it was added in the transaction |
| 1849 | * that was not committed, make sure we fixup the link count of |
| 1850 | * the inode it the entry points to. Otherwise something like |
| 1851 | * the following would result in a directory pointing to an |
| 1852 | * inode with a wrong link that does not account for this dir |
| 1853 | * entry: |
| 1854 | * |
| 1855 | * mkdir testdir |
| 1856 | * touch testdir/foo |
| 1857 | * touch testdir/bar |
| 1858 | * sync |
| 1859 | * |
| 1860 | * ln testdir/bar testdir/bar_link |
| 1861 | * ln testdir/foo testdir/foo_link |
| 1862 | * xfs_io -c "fsync" testdir/bar |
| 1863 | * |
| 1864 | * <power failure> |
| 1865 | * |
| 1866 | * mount fs, log replay happens |
| 1867 | * |
| 1868 | * File foo would remain with a link count of 1 when it has two |
| 1869 | * entries pointing to it in the directory testdir. This would |
| 1870 | * make it impossible to ever delete the parent directory has |
| 1871 | * it would result in stale dentries that can never be deleted. |
| 1872 | */ |
| 1873 | if (ret == 1 && btrfs_dir_type(eb, di) != BTRFS_FT_DIR) { |
| 1874 | struct btrfs_key di_key; |
| 1875 | |
| 1876 | if (!fixup_path) { |
| 1877 | fixup_path = btrfs_alloc_path(); |
| 1878 | if (!fixup_path) { |
| 1879 | ret = -ENOMEM; |
| 1880 | break; |
| 1881 | } |
| 1882 | } |
| 1883 | |
| 1884 | btrfs_dir_item_key_to_cpu(eb, di, &di_key); |
| 1885 | ret = link_to_fixup_dir(trans, root, fixup_path, |
| 1886 | di_key.objectid); |
| 1887 | if (ret) |
| 1888 | break; |
| 1889 | } |
| 1890 | ret = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1891 | } |
Filipe Manana | bb53eda | 2015-07-15 23:26:43 +0100 | [diff] [blame] | 1892 | btrfs_free_path(fixup_path); |
| 1893 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1894 | } |
| 1895 | |
| 1896 | /* |
| 1897 | * directory replay has two parts. There are the standard directory |
| 1898 | * items in the log copied from the subvolume, and range items |
| 1899 | * created in the log while the subvolume was logged. |
| 1900 | * |
| 1901 | * The range items tell us which parts of the key space the log |
| 1902 | * is authoritative for. During replay, if a key in the subvolume |
| 1903 | * directory is in a logged range item, but not actually in the log |
| 1904 | * that means it was deleted from the directory before the fsync |
| 1905 | * and should be removed. |
| 1906 | */ |
| 1907 | static noinline int find_dir_range(struct btrfs_root *root, |
| 1908 | struct btrfs_path *path, |
| 1909 | u64 dirid, int key_type, |
| 1910 | u64 *start_ret, u64 *end_ret) |
| 1911 | { |
| 1912 | struct btrfs_key key; |
| 1913 | u64 found_end; |
| 1914 | struct btrfs_dir_log_item *item; |
| 1915 | int ret; |
| 1916 | int nritems; |
| 1917 | |
| 1918 | if (*start_ret == (u64)-1) |
| 1919 | return 1; |
| 1920 | |
| 1921 | key.objectid = dirid; |
| 1922 | key.type = key_type; |
| 1923 | key.offset = *start_ret; |
| 1924 | |
| 1925 | ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); |
| 1926 | if (ret < 0) |
| 1927 | goto out; |
| 1928 | if (ret > 0) { |
| 1929 | if (path->slots[0] == 0) |
| 1930 | goto out; |
| 1931 | path->slots[0]--; |
| 1932 | } |
| 1933 | if (ret != 0) |
| 1934 | btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]); |
| 1935 | |
| 1936 | if (key.type != key_type || key.objectid != dirid) { |
| 1937 | ret = 1; |
| 1938 | goto next; |
| 1939 | } |
| 1940 | item = btrfs_item_ptr(path->nodes[0], path->slots[0], |
| 1941 | struct btrfs_dir_log_item); |
| 1942 | found_end = btrfs_dir_log_end(path->nodes[0], item); |
| 1943 | |
| 1944 | if (*start_ret >= key.offset && *start_ret <= found_end) { |
| 1945 | ret = 0; |
| 1946 | *start_ret = key.offset; |
| 1947 | *end_ret = found_end; |
| 1948 | goto out; |
| 1949 | } |
| 1950 | ret = 1; |
| 1951 | next: |
| 1952 | /* check the next slot in the tree to see if it is a valid item */ |
| 1953 | nritems = btrfs_header_nritems(path->nodes[0]); |
Robbie Ko | 2a7bf53 | 2016-10-07 17:30:47 +0800 | [diff] [blame] | 1954 | path->slots[0]++; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1955 | if (path->slots[0] >= nritems) { |
| 1956 | ret = btrfs_next_leaf(root, path); |
| 1957 | if (ret) |
| 1958 | goto out; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1959 | } |
| 1960 | |
| 1961 | btrfs_item_key_to_cpu(path->nodes[0], &key, path->slots[0]); |
| 1962 | |
| 1963 | if (key.type != key_type || key.objectid != dirid) { |
| 1964 | ret = 1; |
| 1965 | goto out; |
| 1966 | } |
| 1967 | item = btrfs_item_ptr(path->nodes[0], path->slots[0], |
| 1968 | struct btrfs_dir_log_item); |
| 1969 | found_end = btrfs_dir_log_end(path->nodes[0], item); |
| 1970 | *start_ret = key.offset; |
| 1971 | *end_ret = found_end; |
| 1972 | ret = 0; |
| 1973 | out: |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 1974 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1975 | return ret; |
| 1976 | } |
| 1977 | |
| 1978 | /* |
| 1979 | * this looks for a given directory item in the log. If the directory |
| 1980 | * item is not in the log, the item is removed and the inode it points |
| 1981 | * to is unlinked |
| 1982 | */ |
| 1983 | static noinline int check_item_in_log(struct btrfs_trans_handle *trans, |
| 1984 | struct btrfs_root *root, |
| 1985 | struct btrfs_root *log, |
| 1986 | struct btrfs_path *path, |
| 1987 | struct btrfs_path *log_path, |
| 1988 | struct inode *dir, |
| 1989 | struct btrfs_key *dir_key) |
| 1990 | { |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 1991 | struct btrfs_fs_info *fs_info = root->fs_info; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 1992 | int ret; |
| 1993 | struct extent_buffer *eb; |
| 1994 | int slot; |
| 1995 | u32 item_size; |
| 1996 | struct btrfs_dir_item *di; |
| 1997 | struct btrfs_dir_item *log_di; |
| 1998 | int name_len; |
| 1999 | unsigned long ptr; |
| 2000 | unsigned long ptr_end; |
| 2001 | char *name; |
| 2002 | struct inode *inode; |
| 2003 | struct btrfs_key location; |
| 2004 | |
| 2005 | again: |
| 2006 | eb = path->nodes[0]; |
| 2007 | slot = path->slots[0]; |
| 2008 | item_size = btrfs_item_size_nr(eb, slot); |
| 2009 | ptr = btrfs_item_ptr_offset(eb, slot); |
| 2010 | ptr_end = ptr + item_size; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2011 | while (ptr < ptr_end) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2012 | di = (struct btrfs_dir_item *)ptr; |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 2013 | if (verify_dir_item(fs_info, eb, di)) { |
Josef Bacik | 22a94d4 | 2011-03-16 16:47:17 -0400 | [diff] [blame] | 2014 | ret = -EIO; |
| 2015 | goto out; |
| 2016 | } |
| 2017 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2018 | name_len = btrfs_dir_name_len(eb, di); |
| 2019 | name = kmalloc(name_len, GFP_NOFS); |
| 2020 | if (!name) { |
| 2021 | ret = -ENOMEM; |
| 2022 | goto out; |
| 2023 | } |
| 2024 | read_extent_buffer(eb, name, (unsigned long)(di + 1), |
| 2025 | name_len); |
| 2026 | log_di = NULL; |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2027 | if (log && dir_key->type == BTRFS_DIR_ITEM_KEY) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2028 | log_di = btrfs_lookup_dir_item(trans, log, log_path, |
| 2029 | dir_key->objectid, |
| 2030 | name, name_len, 0); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2031 | } else if (log && dir_key->type == BTRFS_DIR_INDEX_KEY) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2032 | log_di = btrfs_lookup_dir_index_item(trans, log, |
| 2033 | log_path, |
| 2034 | dir_key->objectid, |
| 2035 | dir_key->offset, |
| 2036 | name, name_len, 0); |
| 2037 | } |
Filipe David Borba Manana | 269d040 | 2013-10-28 17:39:21 +0000 | [diff] [blame] | 2038 | if (!log_di || (IS_ERR(log_di) && PTR_ERR(log_di) == -ENOENT)) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2039 | btrfs_dir_item_key_to_cpu(eb, di, &location); |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 2040 | btrfs_release_path(path); |
| 2041 | btrfs_release_path(log_path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2042 | inode = read_one_inode(root, location.objectid); |
Tsutomu Itoh | c00e949 | 2011-04-28 09:10:23 +0000 | [diff] [blame] | 2043 | if (!inode) { |
| 2044 | kfree(name); |
| 2045 | return -EIO; |
| 2046 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2047 | |
| 2048 | ret = link_to_fixup_dir(trans, root, |
| 2049 | path, location.objectid); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 2050 | if (ret) { |
| 2051 | kfree(name); |
| 2052 | iput(inode); |
| 2053 | goto out; |
| 2054 | } |
| 2055 | |
Zach Brown | 8b558c5 | 2013-10-16 12:10:34 -0700 | [diff] [blame] | 2056 | inc_nlink(inode); |
Nikolay Borisov | 4ec5934 | 2017-01-18 00:31:44 +0200 | [diff] [blame] | 2057 | ret = btrfs_unlink_inode(trans, root, BTRFS_I(dir), |
| 2058 | BTRFS_I(inode), name, name_len); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 2059 | if (!ret) |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 2060 | ret = btrfs_run_delayed_items(trans, fs_info); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2061 | kfree(name); |
| 2062 | iput(inode); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 2063 | if (ret) |
| 2064 | goto out; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2065 | |
| 2066 | /* there might still be more names under this key |
| 2067 | * check and repeat if required |
| 2068 | */ |
| 2069 | ret = btrfs_search_slot(NULL, root, dir_key, path, |
| 2070 | 0, 0); |
| 2071 | if (ret == 0) |
| 2072 | goto again; |
| 2073 | ret = 0; |
| 2074 | goto out; |
Filipe David Borba Manana | 269d040 | 2013-10-28 17:39:21 +0000 | [diff] [blame] | 2075 | } else if (IS_ERR(log_di)) { |
| 2076 | kfree(name); |
| 2077 | return PTR_ERR(log_di); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2078 | } |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 2079 | btrfs_release_path(log_path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2080 | kfree(name); |
| 2081 | |
| 2082 | ptr = (unsigned long)(di + 1); |
| 2083 | ptr += name_len; |
| 2084 | } |
| 2085 | ret = 0; |
| 2086 | out: |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 2087 | btrfs_release_path(path); |
| 2088 | btrfs_release_path(log_path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2089 | return ret; |
| 2090 | } |
| 2091 | |
Filipe Manana | 4f764e5 | 2015-02-23 19:53:35 +0000 | [diff] [blame] | 2092 | static int replay_xattr_deletes(struct btrfs_trans_handle *trans, |
| 2093 | struct btrfs_root *root, |
| 2094 | struct btrfs_root *log, |
| 2095 | struct btrfs_path *path, |
| 2096 | const u64 ino) |
| 2097 | { |
| 2098 | struct btrfs_key search_key; |
| 2099 | struct btrfs_path *log_path; |
| 2100 | int i; |
| 2101 | int nritems; |
| 2102 | int ret; |
| 2103 | |
| 2104 | log_path = btrfs_alloc_path(); |
| 2105 | if (!log_path) |
| 2106 | return -ENOMEM; |
| 2107 | |
| 2108 | search_key.objectid = ino; |
| 2109 | search_key.type = BTRFS_XATTR_ITEM_KEY; |
| 2110 | search_key.offset = 0; |
| 2111 | again: |
| 2112 | ret = btrfs_search_slot(NULL, root, &search_key, path, 0, 0); |
| 2113 | if (ret < 0) |
| 2114 | goto out; |
| 2115 | process_leaf: |
| 2116 | nritems = btrfs_header_nritems(path->nodes[0]); |
| 2117 | for (i = path->slots[0]; i < nritems; i++) { |
| 2118 | struct btrfs_key key; |
| 2119 | struct btrfs_dir_item *di; |
| 2120 | struct btrfs_dir_item *log_di; |
| 2121 | u32 total_size; |
| 2122 | u32 cur; |
| 2123 | |
| 2124 | btrfs_item_key_to_cpu(path->nodes[0], &key, i); |
| 2125 | if (key.objectid != ino || key.type != BTRFS_XATTR_ITEM_KEY) { |
| 2126 | ret = 0; |
| 2127 | goto out; |
| 2128 | } |
| 2129 | |
| 2130 | di = btrfs_item_ptr(path->nodes[0], i, struct btrfs_dir_item); |
| 2131 | total_size = btrfs_item_size_nr(path->nodes[0], i); |
| 2132 | cur = 0; |
| 2133 | while (cur < total_size) { |
| 2134 | u16 name_len = btrfs_dir_name_len(path->nodes[0], di); |
| 2135 | u16 data_len = btrfs_dir_data_len(path->nodes[0], di); |
| 2136 | u32 this_len = sizeof(*di) + name_len + data_len; |
| 2137 | char *name; |
| 2138 | |
| 2139 | name = kmalloc(name_len, GFP_NOFS); |
| 2140 | if (!name) { |
| 2141 | ret = -ENOMEM; |
| 2142 | goto out; |
| 2143 | } |
| 2144 | read_extent_buffer(path->nodes[0], name, |
| 2145 | (unsigned long)(di + 1), name_len); |
| 2146 | |
| 2147 | log_di = btrfs_lookup_xattr(NULL, log, log_path, ino, |
| 2148 | name, name_len, 0); |
| 2149 | btrfs_release_path(log_path); |
| 2150 | if (!log_di) { |
| 2151 | /* Doesn't exist in log tree, so delete it. */ |
| 2152 | btrfs_release_path(path); |
| 2153 | di = btrfs_lookup_xattr(trans, root, path, ino, |
| 2154 | name, name_len, -1); |
| 2155 | kfree(name); |
| 2156 | if (IS_ERR(di)) { |
| 2157 | ret = PTR_ERR(di); |
| 2158 | goto out; |
| 2159 | } |
| 2160 | ASSERT(di); |
| 2161 | ret = btrfs_delete_one_dir_name(trans, root, |
| 2162 | path, di); |
| 2163 | if (ret) |
| 2164 | goto out; |
| 2165 | btrfs_release_path(path); |
| 2166 | search_key = key; |
| 2167 | goto again; |
| 2168 | } |
| 2169 | kfree(name); |
| 2170 | if (IS_ERR(log_di)) { |
| 2171 | ret = PTR_ERR(log_di); |
| 2172 | goto out; |
| 2173 | } |
| 2174 | cur += this_len; |
| 2175 | di = (struct btrfs_dir_item *)((char *)di + this_len); |
| 2176 | } |
| 2177 | } |
| 2178 | ret = btrfs_next_leaf(root, path); |
| 2179 | if (ret > 0) |
| 2180 | ret = 0; |
| 2181 | else if (ret == 0) |
| 2182 | goto process_leaf; |
| 2183 | out: |
| 2184 | btrfs_free_path(log_path); |
| 2185 | btrfs_release_path(path); |
| 2186 | return ret; |
| 2187 | } |
| 2188 | |
| 2189 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2190 | /* |
| 2191 | * deletion replay happens before we copy any new directory items |
| 2192 | * out of the log or out of backreferences from inodes. It |
| 2193 | * scans the log to find ranges of keys that log is authoritative for, |
| 2194 | * and then scans the directory to find items in those ranges that are |
| 2195 | * not present in the log. |
| 2196 | * |
| 2197 | * Anything we don't find in the log is unlinked and removed from the |
| 2198 | * directory. |
| 2199 | */ |
| 2200 | static noinline int replay_dir_deletes(struct btrfs_trans_handle *trans, |
| 2201 | struct btrfs_root *root, |
| 2202 | struct btrfs_root *log, |
| 2203 | struct btrfs_path *path, |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2204 | u64 dirid, int del_all) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2205 | { |
| 2206 | u64 range_start; |
| 2207 | u64 range_end; |
| 2208 | int key_type = BTRFS_DIR_LOG_ITEM_KEY; |
| 2209 | int ret = 0; |
| 2210 | struct btrfs_key dir_key; |
| 2211 | struct btrfs_key found_key; |
| 2212 | struct btrfs_path *log_path; |
| 2213 | struct inode *dir; |
| 2214 | |
| 2215 | dir_key.objectid = dirid; |
| 2216 | dir_key.type = BTRFS_DIR_ITEM_KEY; |
| 2217 | log_path = btrfs_alloc_path(); |
| 2218 | if (!log_path) |
| 2219 | return -ENOMEM; |
| 2220 | |
| 2221 | dir = read_one_inode(root, dirid); |
| 2222 | /* it isn't an error if the inode isn't there, that can happen |
| 2223 | * because we replay the deletes before we copy in the inode item |
| 2224 | * from the log |
| 2225 | */ |
| 2226 | if (!dir) { |
| 2227 | btrfs_free_path(log_path); |
| 2228 | return 0; |
| 2229 | } |
| 2230 | again: |
| 2231 | range_start = 0; |
| 2232 | range_end = 0; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2233 | while (1) { |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2234 | if (del_all) |
| 2235 | range_end = (u64)-1; |
| 2236 | else { |
| 2237 | ret = find_dir_range(log, path, dirid, key_type, |
| 2238 | &range_start, &range_end); |
| 2239 | if (ret != 0) |
| 2240 | break; |
| 2241 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2242 | |
| 2243 | dir_key.offset = range_start; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2244 | while (1) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2245 | int nritems; |
| 2246 | ret = btrfs_search_slot(NULL, root, &dir_key, path, |
| 2247 | 0, 0); |
| 2248 | if (ret < 0) |
| 2249 | goto out; |
| 2250 | |
| 2251 | nritems = btrfs_header_nritems(path->nodes[0]); |
| 2252 | if (path->slots[0] >= nritems) { |
| 2253 | ret = btrfs_next_leaf(root, path); |
| 2254 | if (ret) |
| 2255 | break; |
| 2256 | } |
| 2257 | btrfs_item_key_to_cpu(path->nodes[0], &found_key, |
| 2258 | path->slots[0]); |
| 2259 | if (found_key.objectid != dirid || |
| 2260 | found_key.type != dir_key.type) |
| 2261 | goto next_type; |
| 2262 | |
| 2263 | if (found_key.offset > range_end) |
| 2264 | break; |
| 2265 | |
| 2266 | ret = check_item_in_log(trans, root, log, path, |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2267 | log_path, dir, |
| 2268 | &found_key); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 2269 | if (ret) |
| 2270 | goto out; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2271 | if (found_key.offset == (u64)-1) |
| 2272 | break; |
| 2273 | dir_key.offset = found_key.offset + 1; |
| 2274 | } |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 2275 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2276 | if (range_end == (u64)-1) |
| 2277 | break; |
| 2278 | range_start = range_end + 1; |
| 2279 | } |
| 2280 | |
| 2281 | next_type: |
| 2282 | ret = 0; |
| 2283 | if (key_type == BTRFS_DIR_LOG_ITEM_KEY) { |
| 2284 | key_type = BTRFS_DIR_LOG_INDEX_KEY; |
| 2285 | dir_key.type = BTRFS_DIR_INDEX_KEY; |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 2286 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2287 | goto again; |
| 2288 | } |
| 2289 | out: |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 2290 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2291 | btrfs_free_path(log_path); |
| 2292 | iput(dir); |
| 2293 | return ret; |
| 2294 | } |
| 2295 | |
| 2296 | /* |
| 2297 | * the process_func used to replay items from the log tree. This |
| 2298 | * gets called in two different stages. The first stage just looks |
| 2299 | * for inodes and makes sure they are all copied into the subvolume. |
| 2300 | * |
| 2301 | * The second stage copies all the other item types from the log into |
| 2302 | * the subvolume. The two stage approach is slower, but gets rid of |
| 2303 | * lots of complexity around inodes referencing other inodes that exist |
| 2304 | * only in the log (references come from either directory items or inode |
| 2305 | * back refs). |
| 2306 | */ |
| 2307 | static int replay_one_buffer(struct btrfs_root *log, struct extent_buffer *eb, |
| 2308 | struct walk_control *wc, u64 gen) |
| 2309 | { |
| 2310 | int nritems; |
| 2311 | struct btrfs_path *path; |
| 2312 | struct btrfs_root *root = wc->replay_dest; |
| 2313 | struct btrfs_key key; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2314 | int level; |
| 2315 | int i; |
| 2316 | int ret; |
| 2317 | |
Tsutomu Itoh | 018642a | 2012-05-29 18:10:13 +0900 | [diff] [blame] | 2318 | ret = btrfs_read_buffer(eb, gen); |
| 2319 | if (ret) |
| 2320 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2321 | |
| 2322 | level = btrfs_header_level(eb); |
| 2323 | |
| 2324 | if (level != 0) |
| 2325 | return 0; |
| 2326 | |
| 2327 | path = btrfs_alloc_path(); |
Mark Fasheh | 1e5063d | 2011-07-12 10:46:06 -0700 | [diff] [blame] | 2328 | if (!path) |
| 2329 | return -ENOMEM; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2330 | |
| 2331 | nritems = btrfs_header_nritems(eb); |
| 2332 | for (i = 0; i < nritems; i++) { |
| 2333 | btrfs_item_key_to_cpu(eb, &key, i); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2334 | |
| 2335 | /* inode keys are done during the first stage */ |
| 2336 | if (key.type == BTRFS_INODE_ITEM_KEY && |
| 2337 | wc->stage == LOG_WALK_REPLAY_INODES) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2338 | struct btrfs_inode_item *inode_item; |
| 2339 | u32 mode; |
| 2340 | |
| 2341 | inode_item = btrfs_item_ptr(eb, i, |
| 2342 | struct btrfs_inode_item); |
Filipe Manana | 4f764e5 | 2015-02-23 19:53:35 +0000 | [diff] [blame] | 2343 | ret = replay_xattr_deletes(wc->trans, root, log, |
| 2344 | path, key.objectid); |
| 2345 | if (ret) |
| 2346 | break; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2347 | mode = btrfs_inode_mode(eb, inode_item); |
| 2348 | if (S_ISDIR(mode)) { |
| 2349 | ret = replay_dir_deletes(wc->trans, |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2350 | root, log, path, key.objectid, 0); |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 2351 | if (ret) |
| 2352 | break; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2353 | } |
| 2354 | ret = overwrite_item(wc->trans, root, path, |
| 2355 | eb, i, &key); |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 2356 | if (ret) |
| 2357 | break; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2358 | |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 2359 | /* for regular files, make sure corresponding |
Nicholas D Steeves | 0132761 | 2016-05-19 21:18:45 -0400 | [diff] [blame] | 2360 | * orphan item exist. extents past the new EOF |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 2361 | * will be truncated later by orphan cleanup. |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2362 | */ |
| 2363 | if (S_ISREG(mode)) { |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 2364 | ret = insert_orphan_item(wc->trans, root, |
| 2365 | key.objectid); |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 2366 | if (ret) |
| 2367 | break; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2368 | } |
Yan, Zheng | c71bf09 | 2009-11-12 09:34:40 +0000 | [diff] [blame] | 2369 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2370 | ret = link_to_fixup_dir(wc->trans, root, |
| 2371 | path, key.objectid); |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 2372 | if (ret) |
| 2373 | break; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2374 | } |
Josef Bacik | dd8e721 | 2013-09-11 11:57:23 -0400 | [diff] [blame] | 2375 | |
| 2376 | if (key.type == BTRFS_DIR_INDEX_KEY && |
| 2377 | wc->stage == LOG_WALK_REPLAY_DIR_INDEX) { |
| 2378 | ret = replay_one_dir_item(wc->trans, root, path, |
| 2379 | eb, i, &key); |
| 2380 | if (ret) |
| 2381 | break; |
| 2382 | } |
| 2383 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2384 | if (wc->stage < LOG_WALK_REPLAY_ALL) |
| 2385 | continue; |
| 2386 | |
| 2387 | /* these keys are simply copied */ |
| 2388 | if (key.type == BTRFS_XATTR_ITEM_KEY) { |
| 2389 | ret = overwrite_item(wc->trans, root, path, |
| 2390 | eb, i, &key); |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 2391 | if (ret) |
| 2392 | break; |
Liu Bo | 2da1c66 | 2013-05-26 13:50:29 +0000 | [diff] [blame] | 2393 | } else if (key.type == BTRFS_INODE_REF_KEY || |
| 2394 | key.type == BTRFS_INODE_EXTREF_KEY) { |
Mark Fasheh | f186373 | 2012-08-08 11:32:27 -0700 | [diff] [blame] | 2395 | ret = add_inode_ref(wc->trans, root, log, path, |
| 2396 | eb, i, &key); |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 2397 | if (ret && ret != -ENOENT) |
| 2398 | break; |
| 2399 | ret = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2400 | } else if (key.type == BTRFS_EXTENT_DATA_KEY) { |
| 2401 | ret = replay_one_extent(wc->trans, root, path, |
| 2402 | eb, i, &key); |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 2403 | if (ret) |
| 2404 | break; |
Josef Bacik | dd8e721 | 2013-09-11 11:57:23 -0400 | [diff] [blame] | 2405 | } else if (key.type == BTRFS_DIR_ITEM_KEY) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2406 | ret = replay_one_dir_item(wc->trans, root, path, |
| 2407 | eb, i, &key); |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 2408 | if (ret) |
| 2409 | break; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2410 | } |
| 2411 | } |
| 2412 | btrfs_free_path(path); |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 2413 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2414 | } |
| 2415 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2416 | static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2417 | struct btrfs_root *root, |
| 2418 | struct btrfs_path *path, int *level, |
| 2419 | struct walk_control *wc) |
| 2420 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2421 | struct btrfs_fs_info *fs_info = root->fs_info; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2422 | u64 root_owner; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2423 | u64 bytenr; |
| 2424 | u64 ptr_gen; |
| 2425 | struct extent_buffer *next; |
| 2426 | struct extent_buffer *cur; |
| 2427 | struct extent_buffer *parent; |
| 2428 | u32 blocksize; |
| 2429 | int ret = 0; |
| 2430 | |
| 2431 | WARN_ON(*level < 0); |
| 2432 | WARN_ON(*level >= BTRFS_MAX_LEVEL); |
| 2433 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2434 | while (*level > 0) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2435 | WARN_ON(*level < 0); |
| 2436 | WARN_ON(*level >= BTRFS_MAX_LEVEL); |
| 2437 | cur = path->nodes[*level]; |
| 2438 | |
Dulshani Gunawardhana | fae7f21 | 2013-10-31 10:30:08 +0530 | [diff] [blame] | 2439 | WARN_ON(btrfs_header_level(cur) != *level); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2440 | |
| 2441 | if (path->slots[*level] >= |
| 2442 | btrfs_header_nritems(cur)) |
| 2443 | break; |
| 2444 | |
| 2445 | bytenr = btrfs_node_blockptr(cur, path->slots[*level]); |
| 2446 | ptr_gen = btrfs_node_ptr_generation(cur, path->slots[*level]); |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2447 | blocksize = fs_info->nodesize; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2448 | |
| 2449 | parent = path->nodes[*level]; |
| 2450 | root_owner = btrfs_header_owner(parent); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2451 | |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 2452 | next = btrfs_find_create_tree_block(fs_info, bytenr); |
Liu Bo | c871b0f | 2016-06-06 12:01:23 -0700 | [diff] [blame] | 2453 | if (IS_ERR(next)) |
| 2454 | return PTR_ERR(next); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2455 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2456 | if (*level == 1) { |
Mark Fasheh | 1e5063d | 2011-07-12 10:46:06 -0700 | [diff] [blame] | 2457 | ret = wc->process_func(root, next, wc, ptr_gen); |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 2458 | if (ret) { |
| 2459 | free_extent_buffer(next); |
Mark Fasheh | 1e5063d | 2011-07-12 10:46:06 -0700 | [diff] [blame] | 2460 | return ret; |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 2461 | } |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 2462 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2463 | path->slots[*level]++; |
| 2464 | if (wc->free) { |
Tsutomu Itoh | 018642a | 2012-05-29 18:10:13 +0900 | [diff] [blame] | 2465 | ret = btrfs_read_buffer(next, ptr_gen); |
| 2466 | if (ret) { |
| 2467 | free_extent_buffer(next); |
| 2468 | return ret; |
| 2469 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2470 | |
Josef Bacik | 681ae50 | 2013-10-07 15:11:00 -0400 | [diff] [blame] | 2471 | if (trans) { |
| 2472 | btrfs_tree_lock(next); |
| 2473 | btrfs_set_lock_blocking(next); |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2474 | clean_tree_block(trans, fs_info, next); |
Josef Bacik | 681ae50 | 2013-10-07 15:11:00 -0400 | [diff] [blame] | 2475 | btrfs_wait_tree_block_writeback(next); |
| 2476 | btrfs_tree_unlock(next); |
| 2477 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2478 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2479 | WARN_ON(root_owner != |
| 2480 | BTRFS_TREE_LOG_OBJECTID); |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 2481 | ret = btrfs_free_and_pin_reserved_extent( |
| 2482 | fs_info, bytenr, |
| 2483 | blocksize); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 2484 | if (ret) { |
| 2485 | free_extent_buffer(next); |
| 2486 | return ret; |
| 2487 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2488 | } |
| 2489 | free_extent_buffer(next); |
| 2490 | continue; |
| 2491 | } |
Tsutomu Itoh | 018642a | 2012-05-29 18:10:13 +0900 | [diff] [blame] | 2492 | ret = btrfs_read_buffer(next, ptr_gen); |
| 2493 | if (ret) { |
| 2494 | free_extent_buffer(next); |
| 2495 | return ret; |
| 2496 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2497 | |
| 2498 | WARN_ON(*level <= 0); |
| 2499 | if (path->nodes[*level-1]) |
| 2500 | free_extent_buffer(path->nodes[*level-1]); |
| 2501 | path->nodes[*level-1] = next; |
| 2502 | *level = btrfs_header_level(next); |
| 2503 | path->slots[*level] = 0; |
| 2504 | cond_resched(); |
| 2505 | } |
| 2506 | WARN_ON(*level < 0); |
| 2507 | WARN_ON(*level >= BTRFS_MAX_LEVEL); |
| 2508 | |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 2509 | path->slots[*level] = btrfs_header_nritems(path->nodes[*level]); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2510 | |
| 2511 | cond_resched(); |
| 2512 | return 0; |
| 2513 | } |
| 2514 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2515 | static noinline int walk_up_log_tree(struct btrfs_trans_handle *trans, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2516 | struct btrfs_root *root, |
| 2517 | struct btrfs_path *path, int *level, |
| 2518 | struct walk_control *wc) |
| 2519 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2520 | struct btrfs_fs_info *fs_info = root->fs_info; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2521 | u64 root_owner; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2522 | int i; |
| 2523 | int slot; |
| 2524 | int ret; |
| 2525 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2526 | for (i = *level; i < BTRFS_MAX_LEVEL - 1 && path->nodes[i]; i++) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2527 | slot = path->slots[i]; |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 2528 | if (slot + 1 < btrfs_header_nritems(path->nodes[i])) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2529 | path->slots[i]++; |
| 2530 | *level = i; |
| 2531 | WARN_ON(*level == 0); |
| 2532 | return 0; |
| 2533 | } else { |
Zheng Yan | 31840ae | 2008-09-23 13:14:14 -0400 | [diff] [blame] | 2534 | struct extent_buffer *parent; |
| 2535 | if (path->nodes[*level] == root->node) |
| 2536 | parent = path->nodes[*level]; |
| 2537 | else |
| 2538 | parent = path->nodes[*level + 1]; |
| 2539 | |
| 2540 | root_owner = btrfs_header_owner(parent); |
Mark Fasheh | 1e5063d | 2011-07-12 10:46:06 -0700 | [diff] [blame] | 2541 | ret = wc->process_func(root, path->nodes[*level], wc, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2542 | btrfs_header_generation(path->nodes[*level])); |
Mark Fasheh | 1e5063d | 2011-07-12 10:46:06 -0700 | [diff] [blame] | 2543 | if (ret) |
| 2544 | return ret; |
| 2545 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2546 | if (wc->free) { |
| 2547 | struct extent_buffer *next; |
| 2548 | |
| 2549 | next = path->nodes[*level]; |
| 2550 | |
Josef Bacik | 681ae50 | 2013-10-07 15:11:00 -0400 | [diff] [blame] | 2551 | if (trans) { |
| 2552 | btrfs_tree_lock(next); |
| 2553 | btrfs_set_lock_blocking(next); |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2554 | clean_tree_block(trans, fs_info, next); |
Josef Bacik | 681ae50 | 2013-10-07 15:11:00 -0400 | [diff] [blame] | 2555 | btrfs_wait_tree_block_writeback(next); |
| 2556 | btrfs_tree_unlock(next); |
| 2557 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2558 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2559 | WARN_ON(root_owner != BTRFS_TREE_LOG_OBJECTID); |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 2560 | ret = btrfs_free_and_pin_reserved_extent( |
| 2561 | fs_info, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2562 | path->nodes[*level]->start, |
Chris Mason | d00aff0 | 2008-09-11 15:54:42 -0400 | [diff] [blame] | 2563 | path->nodes[*level]->len); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 2564 | if (ret) |
| 2565 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2566 | } |
| 2567 | free_extent_buffer(path->nodes[*level]); |
| 2568 | path->nodes[*level] = NULL; |
| 2569 | *level = i + 1; |
| 2570 | } |
| 2571 | } |
| 2572 | return 1; |
| 2573 | } |
| 2574 | |
| 2575 | /* |
| 2576 | * drop the reference count on the tree rooted at 'snap'. This traverses |
| 2577 | * the tree freeing any blocks that have a ref count of zero after being |
| 2578 | * decremented. |
| 2579 | */ |
| 2580 | static int walk_log_tree(struct btrfs_trans_handle *trans, |
| 2581 | struct btrfs_root *log, struct walk_control *wc) |
| 2582 | { |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 2583 | struct btrfs_fs_info *fs_info = log->fs_info; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2584 | int ret = 0; |
| 2585 | int wret; |
| 2586 | int level; |
| 2587 | struct btrfs_path *path; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2588 | int orig_level; |
| 2589 | |
| 2590 | path = btrfs_alloc_path(); |
Tsutomu Itoh | db5b493 | 2011-03-23 08:14:16 +0000 | [diff] [blame] | 2591 | if (!path) |
| 2592 | return -ENOMEM; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2593 | |
| 2594 | level = btrfs_header_level(log->node); |
| 2595 | orig_level = level; |
| 2596 | path->nodes[level] = log->node; |
| 2597 | extent_buffer_get(log->node); |
| 2598 | path->slots[level] = 0; |
| 2599 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 2600 | while (1) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2601 | wret = walk_down_log_tree(trans, log, path, &level, wc); |
| 2602 | if (wret > 0) |
| 2603 | break; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2604 | if (wret < 0) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2605 | ret = wret; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2606 | goto out; |
| 2607 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2608 | |
| 2609 | wret = walk_up_log_tree(trans, log, path, &level, wc); |
| 2610 | if (wret > 0) |
| 2611 | break; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2612 | if (wret < 0) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2613 | ret = wret; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2614 | goto out; |
| 2615 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2616 | } |
| 2617 | |
| 2618 | /* was the root node processed? if not, catch it here */ |
| 2619 | if (path->nodes[orig_level]) { |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2620 | ret = wc->process_func(log, path->nodes[orig_level], wc, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2621 | btrfs_header_generation(path->nodes[orig_level])); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2622 | if (ret) |
| 2623 | goto out; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2624 | if (wc->free) { |
| 2625 | struct extent_buffer *next; |
| 2626 | |
| 2627 | next = path->nodes[orig_level]; |
| 2628 | |
Josef Bacik | 681ae50 | 2013-10-07 15:11:00 -0400 | [diff] [blame] | 2629 | if (trans) { |
| 2630 | btrfs_tree_lock(next); |
| 2631 | btrfs_set_lock_blocking(next); |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 2632 | clean_tree_block(trans, fs_info, next); |
Josef Bacik | 681ae50 | 2013-10-07 15:11:00 -0400 | [diff] [blame] | 2633 | btrfs_wait_tree_block_writeback(next); |
| 2634 | btrfs_tree_unlock(next); |
| 2635 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2636 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2637 | WARN_ON(log->root_key.objectid != |
| 2638 | BTRFS_TREE_LOG_OBJECTID); |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 2639 | ret = btrfs_free_and_pin_reserved_extent(fs_info, |
| 2640 | next->start, next->len); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 2641 | if (ret) |
| 2642 | goto out; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2643 | } |
| 2644 | } |
| 2645 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2646 | out: |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2647 | btrfs_free_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2648 | return ret; |
| 2649 | } |
| 2650 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2651 | /* |
| 2652 | * helper function to update the item for a given subvolumes log root |
| 2653 | * in the tree of log roots |
| 2654 | */ |
| 2655 | static int update_log_root(struct btrfs_trans_handle *trans, |
| 2656 | struct btrfs_root *log) |
| 2657 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2658 | struct btrfs_fs_info *fs_info = log->fs_info; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2659 | int ret; |
| 2660 | |
| 2661 | if (log->log_transid == 1) { |
| 2662 | /* insert root item on the first sync */ |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2663 | ret = btrfs_insert_root(trans, fs_info->log_root_tree, |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2664 | &log->root_key, &log->root_item); |
| 2665 | } else { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2666 | ret = btrfs_update_root(trans, fs_info->log_root_tree, |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2667 | &log->root_key, &log->root_item); |
| 2668 | } |
| 2669 | return ret; |
| 2670 | } |
| 2671 | |
Zhaolei | 60d53eb | 2015-08-17 18:44:46 +0800 | [diff] [blame] | 2672 | static void wait_log_commit(struct btrfs_root *root, int transid) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2673 | { |
| 2674 | DEFINE_WAIT(wait); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2675 | int index = transid % 2; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2676 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2677 | /* |
| 2678 | * we only allow two pending log transactions at a time, |
| 2679 | * so we know that if ours is more than 2 older than the |
| 2680 | * current transaction, we're done |
| 2681 | */ |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2682 | do { |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2683 | prepare_to_wait(&root->log_commit_wait[index], |
| 2684 | &wait, TASK_UNINTERRUPTIBLE); |
| 2685 | mutex_unlock(&root->log_mutex); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2686 | |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2687 | if (root->log_transid_committed < transid && |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2688 | atomic_read(&root->log_commit[index])) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2689 | schedule(); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2690 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2691 | finish_wait(&root->log_commit_wait[index], &wait); |
| 2692 | mutex_lock(&root->log_mutex); |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2693 | } while (root->log_transid_committed < transid && |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2694 | atomic_read(&root->log_commit[index])); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2695 | } |
| 2696 | |
Zhaolei | 60d53eb | 2015-08-17 18:44:46 +0800 | [diff] [blame] | 2697 | static void wait_for_writer(struct btrfs_root *root) |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2698 | { |
| 2699 | DEFINE_WAIT(wait); |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 2700 | |
| 2701 | while (atomic_read(&root->log_writers)) { |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2702 | prepare_to_wait(&root->log_writer_wait, |
| 2703 | &wait, TASK_UNINTERRUPTIBLE); |
| 2704 | mutex_unlock(&root->log_mutex); |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 2705 | if (atomic_read(&root->log_writers)) |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2706 | schedule(); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2707 | finish_wait(&root->log_writer_wait, &wait); |
Filipe Manana | 575849e | 2015-02-11 11:12:39 +0000 | [diff] [blame] | 2708 | mutex_lock(&root->log_mutex); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2709 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2710 | } |
| 2711 | |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 2712 | static inline void btrfs_remove_log_ctx(struct btrfs_root *root, |
| 2713 | struct btrfs_log_ctx *ctx) |
| 2714 | { |
| 2715 | if (!ctx) |
| 2716 | return; |
| 2717 | |
| 2718 | mutex_lock(&root->log_mutex); |
| 2719 | list_del_init(&ctx->list); |
| 2720 | mutex_unlock(&root->log_mutex); |
| 2721 | } |
| 2722 | |
| 2723 | /* |
| 2724 | * Invoked in log mutex context, or be sure there is no other task which |
| 2725 | * can access the list. |
| 2726 | */ |
| 2727 | static inline void btrfs_remove_all_log_ctxs(struct btrfs_root *root, |
| 2728 | int index, int error) |
| 2729 | { |
| 2730 | struct btrfs_log_ctx *ctx; |
Chris Mason | 570dd45 | 2016-10-27 10:42:20 -0700 | [diff] [blame] | 2731 | struct btrfs_log_ctx *safe; |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 2732 | |
Chris Mason | 570dd45 | 2016-10-27 10:42:20 -0700 | [diff] [blame] | 2733 | list_for_each_entry_safe(ctx, safe, &root->log_ctxs[index], list) { |
| 2734 | list_del_init(&ctx->list); |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 2735 | ctx->log_ret = error; |
Chris Mason | 570dd45 | 2016-10-27 10:42:20 -0700 | [diff] [blame] | 2736 | } |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 2737 | |
| 2738 | INIT_LIST_HEAD(&root->log_ctxs[index]); |
| 2739 | } |
| 2740 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2741 | /* |
| 2742 | * btrfs_sync_log does sends a given tree log down to the disk and |
| 2743 | * updates the super blocks to record it. When this call is done, |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2744 | * you know that any inodes previously logged are safely on disk only |
| 2745 | * if it returns 0. |
| 2746 | * |
| 2747 | * Any other return value means you need to call btrfs_commit_transaction. |
| 2748 | * Some of the edge cases for fsyncing directories that have had unlinks |
| 2749 | * or renames done in the past mean that sometimes the only safe |
| 2750 | * fsync is to commit the whole FS. When btrfs_sync_log returns -EAGAIN, |
| 2751 | * that has happened. |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2752 | */ |
| 2753 | int btrfs_sync_log(struct btrfs_trans_handle *trans, |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 2754 | struct btrfs_root *root, struct btrfs_log_ctx *ctx) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2755 | { |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2756 | int index1; |
| 2757 | int index2; |
Yan, Zheng | 8cef4e1 | 2009-11-12 09:33:26 +0000 | [diff] [blame] | 2758 | int mark; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2759 | int ret; |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2760 | struct btrfs_fs_info *fs_info = root->fs_info; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2761 | struct btrfs_root *log = root->log_root; |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2762 | struct btrfs_root *log_root_tree = fs_info->log_root_tree; |
Miao Xie | bb14a59 | 2014-02-20 18:08:56 +0800 | [diff] [blame] | 2763 | int log_transid = 0; |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 2764 | struct btrfs_log_ctx root_log_ctx; |
Miao Xie | c6adc9c | 2013-05-28 10:05:39 +0000 | [diff] [blame] | 2765 | struct blk_plug plug; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2766 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2767 | mutex_lock(&root->log_mutex); |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2768 | log_transid = ctx->log_transid; |
| 2769 | if (root->log_transid_committed >= log_transid) { |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2770 | mutex_unlock(&root->log_mutex); |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 2771 | return ctx->log_ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2772 | } |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2773 | |
| 2774 | index1 = log_transid % 2; |
| 2775 | if (atomic_read(&root->log_commit[index1])) { |
Zhaolei | 60d53eb | 2015-08-17 18:44:46 +0800 | [diff] [blame] | 2776 | wait_log_commit(root, log_transid); |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2777 | mutex_unlock(&root->log_mutex); |
| 2778 | return ctx->log_ret; |
| 2779 | } |
| 2780 | ASSERT(log_transid == root->log_transid); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2781 | atomic_set(&root->log_commit[index1], 1); |
| 2782 | |
| 2783 | /* wait for previous tree log sync to complete */ |
| 2784 | if (atomic_read(&root->log_commit[(index1 + 1) % 2])) |
Zhaolei | 60d53eb | 2015-08-17 18:44:46 +0800 | [diff] [blame] | 2785 | wait_log_commit(root, log_transid - 1); |
Miao Xie | 48cab2e | 2014-02-20 18:08:52 +0800 | [diff] [blame] | 2786 | |
Yan, Zheng | 86df7eb | 2009-10-14 09:24:59 -0400 | [diff] [blame] | 2787 | while (1) { |
Miao Xie | 2ecb792 | 2012-09-06 04:04:27 -0600 | [diff] [blame] | 2788 | int batch = atomic_read(&root->log_batch); |
Chris Mason | cd354ad | 2011-10-20 15:45:37 -0400 | [diff] [blame] | 2789 | /* when we're on an ssd, just kick the log commit out */ |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2790 | if (!btrfs_test_opt(fs_info, SSD) && |
Miao Xie | 27cdeb7 | 2014-04-02 19:51:05 +0800 | [diff] [blame] | 2791 | test_bit(BTRFS_ROOT_MULTI_LOG_TASKS, &root->state)) { |
Yan, Zheng | 86df7eb | 2009-10-14 09:24:59 -0400 | [diff] [blame] | 2792 | mutex_unlock(&root->log_mutex); |
| 2793 | schedule_timeout_uninterruptible(1); |
| 2794 | mutex_lock(&root->log_mutex); |
| 2795 | } |
Zhaolei | 60d53eb | 2015-08-17 18:44:46 +0800 | [diff] [blame] | 2796 | wait_for_writer(root); |
Miao Xie | 2ecb792 | 2012-09-06 04:04:27 -0600 | [diff] [blame] | 2797 | if (batch == atomic_read(&root->log_batch)) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2798 | break; |
| 2799 | } |
Chris Mason | d0c803c | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 2800 | |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2801 | /* bail out if we need to do a full commit */ |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2802 | if (btrfs_need_log_full_commit(fs_info, trans)) { |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2803 | ret = -EAGAIN; |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 2804 | btrfs_free_logged_extents(log, log_transid); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2805 | mutex_unlock(&root->log_mutex); |
| 2806 | goto out; |
| 2807 | } |
| 2808 | |
Yan, Zheng | 8cef4e1 | 2009-11-12 09:33:26 +0000 | [diff] [blame] | 2809 | if (log_transid % 2 == 0) |
| 2810 | mark = EXTENT_DIRTY; |
| 2811 | else |
| 2812 | mark = EXTENT_NEW; |
| 2813 | |
Chris Mason | 690587d | 2009-10-13 13:29:19 -0400 | [diff] [blame] | 2814 | /* we start IO on all the marked extents here, but we don't actually |
| 2815 | * wait for them until later. |
| 2816 | */ |
Miao Xie | c6adc9c | 2013-05-28 10:05:39 +0000 | [diff] [blame] | 2817 | blk_start_plug(&plug); |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 2818 | ret = btrfs_write_marked_extents(fs_info, &log->dirty_log_pages, mark); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2819 | if (ret) { |
Miao Xie | c6adc9c | 2013-05-28 10:05:39 +0000 | [diff] [blame] | 2820 | blk_finish_plug(&plug); |
Jeff Mahoney | 6664283 | 2016-06-10 18:19:25 -0400 | [diff] [blame] | 2821 | btrfs_abort_transaction(trans, ret); |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 2822 | btrfs_free_logged_extents(log, log_transid); |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2823 | btrfs_set_log_full_commit(fs_info, trans); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2824 | mutex_unlock(&root->log_mutex); |
| 2825 | goto out; |
| 2826 | } |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2827 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 2828 | btrfs_set_root_node(&log->root_item, log->node); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2829 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2830 | root->log_transid++; |
| 2831 | log->log_transid = root->log_transid; |
Josef Bacik | ff782e0 | 2009-10-08 15:30:04 -0400 | [diff] [blame] | 2832 | root->log_start_pid = 0; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2833 | /* |
Yan, Zheng | 8cef4e1 | 2009-11-12 09:33:26 +0000 | [diff] [blame] | 2834 | * IO has been started, blocks of the log tree have WRITTEN flag set |
| 2835 | * in their headers. new modifications of the log will be written to |
| 2836 | * new positions. so it's safe to allow log writers to go in. |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2837 | */ |
| 2838 | mutex_unlock(&root->log_mutex); |
| 2839 | |
Filipe Manana | 28a2359 | 2016-08-23 21:13:51 +0100 | [diff] [blame] | 2840 | btrfs_init_log_ctx(&root_log_ctx, NULL); |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2841 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2842 | mutex_lock(&log_root_tree->log_mutex); |
Miao Xie | 2ecb792 | 2012-09-06 04:04:27 -0600 | [diff] [blame] | 2843 | atomic_inc(&log_root_tree->log_batch); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2844 | atomic_inc(&log_root_tree->log_writers); |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2845 | |
| 2846 | index2 = log_root_tree->log_transid % 2; |
| 2847 | list_add_tail(&root_log_ctx.list, &log_root_tree->log_ctxs[index2]); |
| 2848 | root_log_ctx.log_transid = log_root_tree->log_transid; |
| 2849 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2850 | mutex_unlock(&log_root_tree->log_mutex); |
| 2851 | |
| 2852 | ret = update_log_root(trans, log); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2853 | |
| 2854 | mutex_lock(&log_root_tree->log_mutex); |
| 2855 | if (atomic_dec_and_test(&log_root_tree->log_writers)) { |
David Sterba | 779adf0 | 2015-02-16 19:39:00 +0100 | [diff] [blame] | 2856 | /* |
| 2857 | * Implicit memory barrier after atomic_dec_and_test |
| 2858 | */ |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2859 | if (waitqueue_active(&log_root_tree->log_writer_wait)) |
| 2860 | wake_up(&log_root_tree->log_writer_wait); |
| 2861 | } |
| 2862 | |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 2863 | if (ret) { |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2864 | if (!list_empty(&root_log_ctx.list)) |
| 2865 | list_del_init(&root_log_ctx.list); |
| 2866 | |
Miao Xie | c6adc9c | 2013-05-28 10:05:39 +0000 | [diff] [blame] | 2867 | blk_finish_plug(&plug); |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2868 | btrfs_set_log_full_commit(fs_info, trans); |
Miao Xie | 995946d | 2014-04-02 19:51:06 +0800 | [diff] [blame] | 2869 | |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2870 | if (ret != -ENOSPC) { |
Jeff Mahoney | 6664283 | 2016-06-10 18:19:25 -0400 | [diff] [blame] | 2871 | btrfs_abort_transaction(trans, ret); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2872 | mutex_unlock(&log_root_tree->log_mutex); |
| 2873 | goto out; |
| 2874 | } |
Jeff Mahoney | bf89d38 | 2016-09-09 20:42:44 -0400 | [diff] [blame] | 2875 | btrfs_wait_tree_log_extents(log, mark); |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 2876 | btrfs_free_logged_extents(log, log_transid); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 2877 | mutex_unlock(&log_root_tree->log_mutex); |
| 2878 | ret = -EAGAIN; |
| 2879 | goto out; |
| 2880 | } |
| 2881 | |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2882 | if (log_root_tree->log_transid_committed >= root_log_ctx.log_transid) { |
Forrest Liu | 3da5ab5 | 2015-01-30 19:42:12 +0800 | [diff] [blame] | 2883 | blk_finish_plug(&plug); |
Chris Mason | cbd60aa | 2016-09-06 05:37:40 -0700 | [diff] [blame] | 2884 | list_del_init(&root_log_ctx.list); |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2885 | mutex_unlock(&log_root_tree->log_mutex); |
| 2886 | ret = root_log_ctx.log_ret; |
| 2887 | goto out; |
| 2888 | } |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 2889 | |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2890 | index2 = root_log_ctx.log_transid % 2; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2891 | if (atomic_read(&log_root_tree->log_commit[index2])) { |
Miao Xie | c6adc9c | 2013-05-28 10:05:39 +0000 | [diff] [blame] | 2892 | blk_finish_plug(&plug); |
Jeff Mahoney | bf89d38 | 2016-09-09 20:42:44 -0400 | [diff] [blame] | 2893 | ret = btrfs_wait_tree_log_extents(log, mark); |
Josef Bacik | 50d9aa9 | 2014-11-21 14:52:38 -0500 | [diff] [blame] | 2894 | btrfs_wait_logged_extents(trans, log, log_transid); |
Zhaolei | 60d53eb | 2015-08-17 18:44:46 +0800 | [diff] [blame] | 2895 | wait_log_commit(log_root_tree, |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2896 | root_log_ctx.log_transid); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2897 | mutex_unlock(&log_root_tree->log_mutex); |
Filipe Manana | 5ab5e44 | 2014-11-13 16:59:53 +0000 | [diff] [blame] | 2898 | if (!ret) |
| 2899 | ret = root_log_ctx.log_ret; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2900 | goto out; |
| 2901 | } |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2902 | ASSERT(root_log_ctx.log_transid == log_root_tree->log_transid); |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2903 | atomic_set(&log_root_tree->log_commit[index2], 1); |
| 2904 | |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2905 | if (atomic_read(&log_root_tree->log_commit[(index2 + 1) % 2])) { |
Zhaolei | 60d53eb | 2015-08-17 18:44:46 +0800 | [diff] [blame] | 2906 | wait_log_commit(log_root_tree, |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2907 | root_log_ctx.log_transid - 1); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2908 | } |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2909 | |
Zhaolei | 60d53eb | 2015-08-17 18:44:46 +0800 | [diff] [blame] | 2910 | wait_for_writer(log_root_tree); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2911 | |
| 2912 | /* |
| 2913 | * now that we've moved on to the tree of log tree roots, |
| 2914 | * check the full commit flag again |
| 2915 | */ |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2916 | if (btrfs_need_log_full_commit(fs_info, trans)) { |
Miao Xie | c6adc9c | 2013-05-28 10:05:39 +0000 | [diff] [blame] | 2917 | blk_finish_plug(&plug); |
Jeff Mahoney | bf89d38 | 2016-09-09 20:42:44 -0400 | [diff] [blame] | 2918 | btrfs_wait_tree_log_extents(log, mark); |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 2919 | btrfs_free_logged_extents(log, log_transid); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2920 | mutex_unlock(&log_root_tree->log_mutex); |
| 2921 | ret = -EAGAIN; |
| 2922 | goto out_wake_log_root; |
| 2923 | } |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2924 | |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 2925 | ret = btrfs_write_marked_extents(fs_info, |
Miao Xie | c6adc9c | 2013-05-28 10:05:39 +0000 | [diff] [blame] | 2926 | &log_root_tree->dirty_log_pages, |
| 2927 | EXTENT_DIRTY | EXTENT_NEW); |
| 2928 | blk_finish_plug(&plug); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2929 | if (ret) { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2930 | btrfs_set_log_full_commit(fs_info, trans); |
Jeff Mahoney | 6664283 | 2016-06-10 18:19:25 -0400 | [diff] [blame] | 2931 | btrfs_abort_transaction(trans, ret); |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 2932 | btrfs_free_logged_extents(log, log_transid); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 2933 | mutex_unlock(&log_root_tree->log_mutex); |
| 2934 | goto out_wake_log_root; |
| 2935 | } |
Jeff Mahoney | bf89d38 | 2016-09-09 20:42:44 -0400 | [diff] [blame] | 2936 | ret = btrfs_wait_tree_log_extents(log, mark); |
Filipe Manana | 5ab5e44 | 2014-11-13 16:59:53 +0000 | [diff] [blame] | 2937 | if (!ret) |
Jeff Mahoney | bf89d38 | 2016-09-09 20:42:44 -0400 | [diff] [blame] | 2938 | ret = btrfs_wait_tree_log_extents(log_root_tree, |
| 2939 | EXTENT_NEW | EXTENT_DIRTY); |
Filipe Manana | 5ab5e44 | 2014-11-13 16:59:53 +0000 | [diff] [blame] | 2940 | if (ret) { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2941 | btrfs_set_log_full_commit(fs_info, trans); |
Filipe Manana | 5ab5e44 | 2014-11-13 16:59:53 +0000 | [diff] [blame] | 2942 | btrfs_free_logged_extents(log, log_transid); |
| 2943 | mutex_unlock(&log_root_tree->log_mutex); |
| 2944 | goto out_wake_log_root; |
| 2945 | } |
Josef Bacik | 50d9aa9 | 2014-11-21 14:52:38 -0500 | [diff] [blame] | 2946 | btrfs_wait_logged_extents(trans, log, log_transid); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2947 | |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2948 | btrfs_set_super_log_root(fs_info->super_for_commit, |
| 2949 | log_root_tree->node->start); |
| 2950 | btrfs_set_super_log_root_level(fs_info->super_for_commit, |
| 2951 | btrfs_header_level(log_root_tree->node)); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2952 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2953 | log_root_tree->log_transid++; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2954 | mutex_unlock(&log_root_tree->log_mutex); |
| 2955 | |
| 2956 | /* |
| 2957 | * nobody else is going to jump in and write the the ctree |
| 2958 | * super here because the log_commit atomic below is protecting |
| 2959 | * us. We must be called with a transaction handle pinning |
| 2960 | * the running transaction open, so a full commit can't hop |
| 2961 | * in and cause problems either. |
| 2962 | */ |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 2963 | ret = write_ctree_super(trans, fs_info, 1); |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 2964 | if (ret) { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2965 | btrfs_set_log_full_commit(fs_info, trans); |
Jeff Mahoney | 6664283 | 2016-06-10 18:19:25 -0400 | [diff] [blame] | 2966 | btrfs_abort_transaction(trans, ret); |
Stefan Behrens | 5af3e8c | 2012-08-01 18:56:49 +0200 | [diff] [blame] | 2967 | goto out_wake_log_root; |
| 2968 | } |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2969 | |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 2970 | mutex_lock(&root->log_mutex); |
| 2971 | if (root->last_log_commit < log_transid) |
| 2972 | root->last_log_commit = log_transid; |
| 2973 | mutex_unlock(&root->log_mutex); |
| 2974 | |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 2975 | out_wake_log_root: |
Chris Mason | 570dd45 | 2016-10-27 10:42:20 -0700 | [diff] [blame] | 2976 | mutex_lock(&log_root_tree->log_mutex); |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 2977 | btrfs_remove_all_log_ctxs(log_root_tree, index2, ret); |
| 2978 | |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2979 | log_root_tree->log_transid_committed++; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2980 | atomic_set(&log_root_tree->log_commit[index2], 0); |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2981 | mutex_unlock(&log_root_tree->log_mutex); |
| 2982 | |
David Sterba | 33a9eca | 2015-10-10 18:35:10 +0200 | [diff] [blame] | 2983 | /* |
| 2984 | * The barrier before waitqueue_active is implied by mutex_unlock |
| 2985 | */ |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2986 | if (waitqueue_active(&log_root_tree->log_commit_wait[index2])) |
| 2987 | wake_up(&log_root_tree->log_commit_wait[index2]); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 2988 | out: |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2989 | mutex_lock(&root->log_mutex); |
Chris Mason | 570dd45 | 2016-10-27 10:42:20 -0700 | [diff] [blame] | 2990 | btrfs_remove_all_log_ctxs(root, index1, ret); |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2991 | root->log_transid_committed++; |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2992 | atomic_set(&root->log_commit[index1], 0); |
Miao Xie | d1433de | 2014-02-20 18:08:59 +0800 | [diff] [blame] | 2993 | mutex_unlock(&root->log_mutex); |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 2994 | |
David Sterba | 33a9eca | 2015-10-10 18:35:10 +0200 | [diff] [blame] | 2995 | /* |
| 2996 | * The barrier before waitqueue_active is implied by mutex_unlock |
| 2997 | */ |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 2998 | if (waitqueue_active(&root->log_commit_wait[index1])) |
| 2999 | wake_up(&root->log_commit_wait[index1]); |
Chris Mason | b31eabd | 2011-01-31 16:48:24 -0500 | [diff] [blame] | 3000 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3001 | } |
| 3002 | |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3003 | static void free_log_tree(struct btrfs_trans_handle *trans, |
| 3004 | struct btrfs_root *log) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3005 | { |
| 3006 | int ret; |
Chris Mason | d0c803c | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3007 | u64 start; |
| 3008 | u64 end; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3009 | struct walk_control wc = { |
| 3010 | .free = 1, |
| 3011 | .process_func = process_one_buffer |
| 3012 | }; |
| 3013 | |
Josef Bacik | 681ae50 | 2013-10-07 15:11:00 -0400 | [diff] [blame] | 3014 | ret = walk_log_tree(trans, log, &wc); |
| 3015 | /* I don't think this can happen but just in case */ |
| 3016 | if (ret) |
Jeff Mahoney | 6664283 | 2016-06-10 18:19:25 -0400 | [diff] [blame] | 3017 | btrfs_abort_transaction(trans, ret); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3018 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3019 | while (1) { |
Chris Mason | d0c803c | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3020 | ret = find_first_extent_bit(&log->dirty_log_pages, |
Josef Bacik | e613887 | 2012-09-27 17:07:30 -0400 | [diff] [blame] | 3021 | 0, &start, &end, EXTENT_DIRTY | EXTENT_NEW, |
| 3022 | NULL); |
Chris Mason | d0c803c | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3023 | if (ret) |
| 3024 | break; |
| 3025 | |
Yan, Zheng | 8cef4e1 | 2009-11-12 09:33:26 +0000 | [diff] [blame] | 3026 | clear_extent_bits(&log->dirty_log_pages, start, end, |
David Sterba | 9116621 | 2016-04-26 23:54:39 +0200 | [diff] [blame] | 3027 | EXTENT_DIRTY | EXTENT_NEW); |
Chris Mason | d0c803c | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3028 | } |
| 3029 | |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 3030 | /* |
| 3031 | * We may have short-circuited the log tree with the full commit logic |
| 3032 | * and left ordered extents on our list, so clear these out to keep us |
| 3033 | * from leaking inodes and memory. |
| 3034 | */ |
| 3035 | btrfs_free_logged_extents(log, 0); |
| 3036 | btrfs_free_logged_extents(log, 1); |
| 3037 | |
Yan Zheng | 7237f18 | 2009-01-21 12:54:03 -0500 | [diff] [blame] | 3038 | free_extent_buffer(log->node); |
| 3039 | kfree(log); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3040 | } |
| 3041 | |
| 3042 | /* |
| 3043 | * free all the extents used by the tree log. This should be called |
| 3044 | * at commit time of the full transaction |
| 3045 | */ |
| 3046 | int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root) |
| 3047 | { |
| 3048 | if (root->log_root) { |
| 3049 | free_log_tree(trans, root->log_root); |
| 3050 | root->log_root = NULL; |
| 3051 | } |
| 3052 | return 0; |
| 3053 | } |
| 3054 | |
| 3055 | int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans, |
| 3056 | struct btrfs_fs_info *fs_info) |
| 3057 | { |
| 3058 | if (fs_info->log_root_tree) { |
| 3059 | free_log_tree(trans, fs_info->log_root_tree); |
| 3060 | fs_info->log_root_tree = NULL; |
| 3061 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3062 | return 0; |
| 3063 | } |
| 3064 | |
| 3065 | /* |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3066 | * If both a file and directory are logged, and unlinks or renames are |
| 3067 | * mixed in, we have a few interesting corners: |
| 3068 | * |
| 3069 | * create file X in dir Y |
| 3070 | * link file X to X.link in dir Y |
| 3071 | * fsync file X |
| 3072 | * unlink file X but leave X.link |
| 3073 | * fsync dir Y |
| 3074 | * |
| 3075 | * After a crash we would expect only X.link to exist. But file X |
| 3076 | * didn't get fsync'd again so the log has back refs for X and X.link. |
| 3077 | * |
| 3078 | * We solve this by removing directory entries and inode backrefs from the |
| 3079 | * log when a file that was logged in the current transaction is |
| 3080 | * unlinked. Any later fsync will include the updated log entries, and |
| 3081 | * we'll be able to reconstruct the proper directory items from backrefs. |
| 3082 | * |
| 3083 | * This optimizations allows us to avoid relogging the entire inode |
| 3084 | * or the entire directory. |
| 3085 | */ |
| 3086 | int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, |
| 3087 | struct btrfs_root *root, |
| 3088 | const char *name, int name_len, |
Nikolay Borisov | 49f34d1 | 2017-01-18 00:31:32 +0200 | [diff] [blame] | 3089 | struct btrfs_inode *dir, u64 index) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3090 | { |
| 3091 | struct btrfs_root *log; |
| 3092 | struct btrfs_dir_item *di; |
| 3093 | struct btrfs_path *path; |
| 3094 | int ret; |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3095 | int err = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3096 | int bytes_del = 0; |
Nikolay Borisov | 49f34d1 | 2017-01-18 00:31:32 +0200 | [diff] [blame] | 3097 | u64 dir_ino = btrfs_ino(dir); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3098 | |
Nikolay Borisov | 49f34d1 | 2017-01-18 00:31:32 +0200 | [diff] [blame] | 3099 | if (dir->logged_trans < trans->transid) |
Chris Mason | 3a5f1d4 | 2008-09-11 15:53:37 -0400 | [diff] [blame] | 3100 | return 0; |
| 3101 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3102 | ret = join_running_log_trans(root); |
| 3103 | if (ret) |
| 3104 | return 0; |
| 3105 | |
Nikolay Borisov | 49f34d1 | 2017-01-18 00:31:32 +0200 | [diff] [blame] | 3106 | mutex_lock(&dir->log_mutex); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3107 | |
| 3108 | log = root->log_root; |
| 3109 | path = btrfs_alloc_path(); |
Tsutomu Itoh | a62f44a | 2011-04-25 19:43:51 -0400 | [diff] [blame] | 3110 | if (!path) { |
| 3111 | err = -ENOMEM; |
| 3112 | goto out_unlock; |
| 3113 | } |
liubo | 2a29edc | 2011-01-26 06:22:08 +0000 | [diff] [blame] | 3114 | |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 3115 | di = btrfs_lookup_dir_item(trans, log, path, dir_ino, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3116 | name, name_len, -1); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3117 | if (IS_ERR(di)) { |
| 3118 | err = PTR_ERR(di); |
| 3119 | goto fail; |
| 3120 | } |
| 3121 | if (di) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3122 | ret = btrfs_delete_one_dir_name(trans, log, path, di); |
| 3123 | bytes_del += name_len; |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 3124 | if (ret) { |
| 3125 | err = ret; |
| 3126 | goto fail; |
| 3127 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3128 | } |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 3129 | btrfs_release_path(path); |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 3130 | di = btrfs_lookup_dir_index_item(trans, log, path, dir_ino, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3131 | index, name, name_len, -1); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3132 | if (IS_ERR(di)) { |
| 3133 | err = PTR_ERR(di); |
| 3134 | goto fail; |
| 3135 | } |
| 3136 | if (di) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3137 | ret = btrfs_delete_one_dir_name(trans, log, path, di); |
| 3138 | bytes_del += name_len; |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 3139 | if (ret) { |
| 3140 | err = ret; |
| 3141 | goto fail; |
| 3142 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3143 | } |
| 3144 | |
| 3145 | /* update the directory size in the log to reflect the names |
| 3146 | * we have removed |
| 3147 | */ |
| 3148 | if (bytes_del) { |
| 3149 | struct btrfs_key key; |
| 3150 | |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 3151 | key.objectid = dir_ino; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3152 | key.offset = 0; |
| 3153 | key.type = BTRFS_INODE_ITEM_KEY; |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 3154 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3155 | |
| 3156 | ret = btrfs_search_slot(trans, log, &key, path, 0, 1); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3157 | if (ret < 0) { |
| 3158 | err = ret; |
| 3159 | goto fail; |
| 3160 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3161 | if (ret == 0) { |
| 3162 | struct btrfs_inode_item *item; |
| 3163 | u64 i_size; |
| 3164 | |
| 3165 | item = btrfs_item_ptr(path->nodes[0], path->slots[0], |
| 3166 | struct btrfs_inode_item); |
| 3167 | i_size = btrfs_inode_size(path->nodes[0], item); |
| 3168 | if (i_size > bytes_del) |
| 3169 | i_size -= bytes_del; |
| 3170 | else |
| 3171 | i_size = 0; |
| 3172 | btrfs_set_inode_size(path->nodes[0], item, i_size); |
| 3173 | btrfs_mark_buffer_dirty(path->nodes[0]); |
| 3174 | } else |
| 3175 | ret = 0; |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 3176 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3177 | } |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3178 | fail: |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3179 | btrfs_free_path(path); |
Tsutomu Itoh | a62f44a | 2011-04-25 19:43:51 -0400 | [diff] [blame] | 3180 | out_unlock: |
Nikolay Borisov | 49f34d1 | 2017-01-18 00:31:32 +0200 | [diff] [blame] | 3181 | mutex_unlock(&dir->log_mutex); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3182 | if (ret == -ENOSPC) { |
Miao Xie | 995946d | 2014-04-02 19:51:06 +0800 | [diff] [blame] | 3183 | btrfs_set_log_full_commit(root->fs_info, trans); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3184 | ret = 0; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3185 | } else if (ret < 0) |
Jeff Mahoney | 6664283 | 2016-06-10 18:19:25 -0400 | [diff] [blame] | 3186 | btrfs_abort_transaction(trans, ret); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3187 | |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 3188 | btrfs_end_log_trans(root); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3189 | |
Andi Kleen | 411fc6b | 2010-10-29 15:14:31 -0400 | [diff] [blame] | 3190 | return err; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3191 | } |
| 3192 | |
| 3193 | /* see comments for btrfs_del_dir_entries_in_log */ |
| 3194 | int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, |
| 3195 | struct btrfs_root *root, |
| 3196 | const char *name, int name_len, |
Nikolay Borisov | a491abb | 2017-01-18 00:31:33 +0200 | [diff] [blame] | 3197 | struct btrfs_inode *inode, u64 dirid) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3198 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 3199 | struct btrfs_fs_info *fs_info = root->fs_info; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3200 | struct btrfs_root *log; |
| 3201 | u64 index; |
| 3202 | int ret; |
| 3203 | |
Nikolay Borisov | a491abb | 2017-01-18 00:31:33 +0200 | [diff] [blame] | 3204 | if (inode->logged_trans < trans->transid) |
Chris Mason | 3a5f1d4 | 2008-09-11 15:53:37 -0400 | [diff] [blame] | 3205 | return 0; |
| 3206 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3207 | ret = join_running_log_trans(root); |
| 3208 | if (ret) |
| 3209 | return 0; |
| 3210 | log = root->log_root; |
Nikolay Borisov | a491abb | 2017-01-18 00:31:33 +0200 | [diff] [blame] | 3211 | mutex_lock(&inode->log_mutex); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3212 | |
Nikolay Borisov | a491abb | 2017-01-18 00:31:33 +0200 | [diff] [blame] | 3213 | ret = btrfs_del_inode_ref(trans, log, name, name_len, btrfs_ino(inode), |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3214 | dirid, &index); |
Nikolay Borisov | a491abb | 2017-01-18 00:31:33 +0200 | [diff] [blame] | 3215 | mutex_unlock(&inode->log_mutex); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3216 | if (ret == -ENOSPC) { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 3217 | btrfs_set_log_full_commit(fs_info, trans); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3218 | ret = 0; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 3219 | } else if (ret < 0 && ret != -ENOENT) |
Jeff Mahoney | 6664283 | 2016-06-10 18:19:25 -0400 | [diff] [blame] | 3220 | btrfs_abort_transaction(trans, ret); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 3221 | btrfs_end_log_trans(root); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3222 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3223 | return ret; |
| 3224 | } |
| 3225 | |
| 3226 | /* |
| 3227 | * creates a range item in the log for 'dirid'. first_offset and |
| 3228 | * last_offset tell us which parts of the key space the log should |
| 3229 | * be considered authoritative for. |
| 3230 | */ |
| 3231 | static noinline int insert_dir_log_key(struct btrfs_trans_handle *trans, |
| 3232 | struct btrfs_root *log, |
| 3233 | struct btrfs_path *path, |
| 3234 | int key_type, u64 dirid, |
| 3235 | u64 first_offset, u64 last_offset) |
| 3236 | { |
| 3237 | int ret; |
| 3238 | struct btrfs_key key; |
| 3239 | struct btrfs_dir_log_item *item; |
| 3240 | |
| 3241 | key.objectid = dirid; |
| 3242 | key.offset = first_offset; |
| 3243 | if (key_type == BTRFS_DIR_ITEM_KEY) |
| 3244 | key.type = BTRFS_DIR_LOG_ITEM_KEY; |
| 3245 | else |
| 3246 | key.type = BTRFS_DIR_LOG_INDEX_KEY; |
| 3247 | ret = btrfs_insert_empty_item(trans, log, path, &key, sizeof(*item)); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3248 | if (ret) |
| 3249 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3250 | |
| 3251 | item = btrfs_item_ptr(path->nodes[0], path->slots[0], |
| 3252 | struct btrfs_dir_log_item); |
| 3253 | btrfs_set_dir_log_end(path->nodes[0], item, last_offset); |
| 3254 | btrfs_mark_buffer_dirty(path->nodes[0]); |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 3255 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3256 | return 0; |
| 3257 | } |
| 3258 | |
| 3259 | /* |
| 3260 | * log all the items included in the current transaction for a given |
| 3261 | * directory. This also creates the range items in the log tree required |
| 3262 | * to replay anything deleted before the fsync |
| 3263 | */ |
| 3264 | static noinline int log_dir_items(struct btrfs_trans_handle *trans, |
Nikolay Borisov | 684a577 | 2017-01-18 00:31:41 +0200 | [diff] [blame] | 3265 | struct btrfs_root *root, struct btrfs_inode *inode, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3266 | struct btrfs_path *path, |
| 3267 | struct btrfs_path *dst_path, int key_type, |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 3268 | struct btrfs_log_ctx *ctx, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3269 | u64 min_offset, u64 *last_offset_ret) |
| 3270 | { |
| 3271 | struct btrfs_key min_key; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3272 | struct btrfs_root *log = root->log_root; |
| 3273 | struct extent_buffer *src; |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3274 | int err = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3275 | int ret; |
| 3276 | int i; |
| 3277 | int nritems; |
| 3278 | u64 first_offset = min_offset; |
| 3279 | u64 last_offset = (u64)-1; |
Nikolay Borisov | 684a577 | 2017-01-18 00:31:41 +0200 | [diff] [blame] | 3280 | u64 ino = btrfs_ino(inode); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3281 | |
| 3282 | log = root->log_root; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3283 | |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 3284 | min_key.objectid = ino; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3285 | min_key.type = key_type; |
| 3286 | min_key.offset = min_offset; |
| 3287 | |
Filipe David Borba Manana | 6174d3c | 2013-10-01 16:13:42 +0100 | [diff] [blame] | 3288 | ret = btrfs_search_forward(root, &min_key, path, trans->transid); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3289 | |
| 3290 | /* |
| 3291 | * we didn't find anything from this transaction, see if there |
| 3292 | * is anything at all |
| 3293 | */ |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 3294 | if (ret != 0 || min_key.objectid != ino || min_key.type != key_type) { |
| 3295 | min_key.objectid = ino; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3296 | min_key.type = key_type; |
| 3297 | min_key.offset = (u64)-1; |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 3298 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3299 | ret = btrfs_search_slot(NULL, root, &min_key, path, 0, 0); |
| 3300 | if (ret < 0) { |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 3301 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3302 | return ret; |
| 3303 | } |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 3304 | ret = btrfs_previous_item(root, path, ino, key_type); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3305 | |
| 3306 | /* if ret == 0 there are items for this type, |
| 3307 | * create a range to tell us the last key of this type. |
| 3308 | * otherwise, there are no items in this directory after |
| 3309 | * *min_offset, and we create a range to indicate that. |
| 3310 | */ |
| 3311 | if (ret == 0) { |
| 3312 | struct btrfs_key tmp; |
| 3313 | btrfs_item_key_to_cpu(path->nodes[0], &tmp, |
| 3314 | path->slots[0]); |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3315 | if (key_type == tmp.type) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3316 | first_offset = max(min_offset, tmp.offset) + 1; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3317 | } |
| 3318 | goto done; |
| 3319 | } |
| 3320 | |
| 3321 | /* go backward to find any previous key */ |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 3322 | ret = btrfs_previous_item(root, path, ino, key_type); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3323 | if (ret == 0) { |
| 3324 | struct btrfs_key tmp; |
| 3325 | btrfs_item_key_to_cpu(path->nodes[0], &tmp, path->slots[0]); |
| 3326 | if (key_type == tmp.type) { |
| 3327 | first_offset = tmp.offset; |
| 3328 | ret = overwrite_item(trans, log, dst_path, |
| 3329 | path->nodes[0], path->slots[0], |
| 3330 | &tmp); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3331 | if (ret) { |
| 3332 | err = ret; |
| 3333 | goto done; |
| 3334 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3335 | } |
| 3336 | } |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 3337 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3338 | |
| 3339 | /* find the first key from this transaction again */ |
| 3340 | ret = btrfs_search_slot(NULL, root, &min_key, path, 0, 0); |
Dulshani Gunawardhana | fae7f21 | 2013-10-31 10:30:08 +0530 | [diff] [blame] | 3341 | if (WARN_ON(ret != 0)) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3342 | goto done; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3343 | |
| 3344 | /* |
| 3345 | * we have a block from this transaction, log every item in it |
| 3346 | * from our directory |
| 3347 | */ |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3348 | while (1) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3349 | struct btrfs_key tmp; |
| 3350 | src = path->nodes[0]; |
| 3351 | nritems = btrfs_header_nritems(src); |
| 3352 | for (i = path->slots[0]; i < nritems; i++) { |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 3353 | struct btrfs_dir_item *di; |
| 3354 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3355 | btrfs_item_key_to_cpu(src, &min_key, i); |
| 3356 | |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 3357 | if (min_key.objectid != ino || min_key.type != key_type) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3358 | goto done; |
| 3359 | ret = overwrite_item(trans, log, dst_path, src, i, |
| 3360 | &min_key); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3361 | if (ret) { |
| 3362 | err = ret; |
| 3363 | goto done; |
| 3364 | } |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 3365 | |
| 3366 | /* |
| 3367 | * We must make sure that when we log a directory entry, |
| 3368 | * the corresponding inode, after log replay, has a |
| 3369 | * matching link count. For example: |
| 3370 | * |
| 3371 | * touch foo |
| 3372 | * mkdir mydir |
| 3373 | * sync |
| 3374 | * ln foo mydir/bar |
| 3375 | * xfs_io -c "fsync" mydir |
| 3376 | * <crash> |
| 3377 | * <mount fs and log replay> |
| 3378 | * |
| 3379 | * Would result in a fsync log that when replayed, our |
| 3380 | * file inode would have a link count of 1, but we get |
| 3381 | * two directory entries pointing to the same inode. |
| 3382 | * After removing one of the names, it would not be |
| 3383 | * possible to remove the other name, which resulted |
| 3384 | * always in stale file handle errors, and would not |
| 3385 | * be possible to rmdir the parent directory, since |
| 3386 | * its i_size could never decrement to the value |
| 3387 | * BTRFS_EMPTY_DIR_SIZE, resulting in -ENOTEMPTY errors. |
| 3388 | */ |
| 3389 | di = btrfs_item_ptr(src, i, struct btrfs_dir_item); |
| 3390 | btrfs_dir_item_key_to_cpu(src, di, &tmp); |
| 3391 | if (ctx && |
| 3392 | (btrfs_dir_transid(src, di) == trans->transid || |
| 3393 | btrfs_dir_type(src, di) == BTRFS_FT_DIR) && |
| 3394 | tmp.type != BTRFS_ROOT_ITEM_KEY) |
| 3395 | ctx->log_new_dentries = true; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3396 | } |
| 3397 | path->slots[0] = nritems; |
| 3398 | |
| 3399 | /* |
| 3400 | * look ahead to the next item and see if it is also |
| 3401 | * from this directory and from this transaction |
| 3402 | */ |
| 3403 | ret = btrfs_next_leaf(root, path); |
| 3404 | if (ret == 1) { |
| 3405 | last_offset = (u64)-1; |
| 3406 | goto done; |
| 3407 | } |
| 3408 | btrfs_item_key_to_cpu(path->nodes[0], &tmp, path->slots[0]); |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 3409 | if (tmp.objectid != ino || tmp.type != key_type) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3410 | last_offset = (u64)-1; |
| 3411 | goto done; |
| 3412 | } |
| 3413 | if (btrfs_header_generation(path->nodes[0]) != trans->transid) { |
| 3414 | ret = overwrite_item(trans, log, dst_path, |
| 3415 | path->nodes[0], path->slots[0], |
| 3416 | &tmp); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3417 | if (ret) |
| 3418 | err = ret; |
| 3419 | else |
| 3420 | last_offset = tmp.offset; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3421 | goto done; |
| 3422 | } |
| 3423 | } |
| 3424 | done: |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 3425 | btrfs_release_path(path); |
| 3426 | btrfs_release_path(dst_path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3427 | |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3428 | if (err == 0) { |
| 3429 | *last_offset_ret = last_offset; |
| 3430 | /* |
| 3431 | * insert the log range keys to indicate where the log |
| 3432 | * is valid |
| 3433 | */ |
| 3434 | ret = insert_dir_log_key(trans, log, path, key_type, |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 3435 | ino, first_offset, last_offset); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3436 | if (ret) |
| 3437 | err = ret; |
| 3438 | } |
| 3439 | return err; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3440 | } |
| 3441 | |
| 3442 | /* |
| 3443 | * logging directories is very similar to logging inodes, We find all the items |
| 3444 | * from the current transaction and write them to the log. |
| 3445 | * |
| 3446 | * The recovery code scans the directory in the subvolume, and if it finds a |
| 3447 | * key in the range logged that is not present in the log tree, then it means |
| 3448 | * that dir entry was unlinked during the transaction. |
| 3449 | * |
| 3450 | * In order for that scan to work, we must include one key smaller than |
| 3451 | * the smallest logged by this transaction and one key larger than the largest |
| 3452 | * key logged by this transaction. |
| 3453 | */ |
| 3454 | static noinline int log_directory_changes(struct btrfs_trans_handle *trans, |
Nikolay Borisov | dbf39ea | 2017-01-18 00:31:42 +0200 | [diff] [blame] | 3455 | struct btrfs_root *root, struct btrfs_inode *inode, |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3456 | struct btrfs_path *path, |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 3457 | struct btrfs_path *dst_path, |
| 3458 | struct btrfs_log_ctx *ctx) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3459 | { |
| 3460 | u64 min_key; |
| 3461 | u64 max_key; |
| 3462 | int ret; |
| 3463 | int key_type = BTRFS_DIR_ITEM_KEY; |
| 3464 | |
| 3465 | again: |
| 3466 | min_key = 0; |
| 3467 | max_key = 0; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3468 | while (1) { |
Nikolay Borisov | dbf39ea | 2017-01-18 00:31:42 +0200 | [diff] [blame] | 3469 | ret = log_dir_items(trans, root, inode, path, dst_path, key_type, |
| 3470 | ctx, min_key, &max_key); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3471 | if (ret) |
| 3472 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3473 | if (max_key == (u64)-1) |
| 3474 | break; |
| 3475 | min_key = max_key + 1; |
| 3476 | } |
| 3477 | |
| 3478 | if (key_type == BTRFS_DIR_ITEM_KEY) { |
| 3479 | key_type = BTRFS_DIR_INDEX_KEY; |
| 3480 | goto again; |
| 3481 | } |
| 3482 | return 0; |
| 3483 | } |
| 3484 | |
| 3485 | /* |
| 3486 | * a helper function to drop items from the log before we relog an |
| 3487 | * inode. max_key_type indicates the highest item type to remove. |
| 3488 | * This cannot be run for file data extents because it does not |
| 3489 | * free the extents they point to. |
| 3490 | */ |
| 3491 | static int drop_objectid_items(struct btrfs_trans_handle *trans, |
| 3492 | struct btrfs_root *log, |
| 3493 | struct btrfs_path *path, |
| 3494 | u64 objectid, int max_key_type) |
| 3495 | { |
| 3496 | int ret; |
| 3497 | struct btrfs_key key; |
| 3498 | struct btrfs_key found_key; |
Josef Bacik | 18ec90d | 2012-09-28 11:56:28 -0400 | [diff] [blame] | 3499 | int start_slot; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3500 | |
| 3501 | key.objectid = objectid; |
| 3502 | key.type = max_key_type; |
| 3503 | key.offset = (u64)-1; |
| 3504 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3505 | while (1) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3506 | ret = btrfs_search_slot(trans, log, &key, path, -1, 1); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 3507 | BUG_ON(ret == 0); /* Logic error */ |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3508 | if (ret < 0) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3509 | break; |
| 3510 | |
| 3511 | if (path->slots[0] == 0) |
| 3512 | break; |
| 3513 | |
| 3514 | path->slots[0]--; |
| 3515 | btrfs_item_key_to_cpu(path->nodes[0], &found_key, |
| 3516 | path->slots[0]); |
| 3517 | |
| 3518 | if (found_key.objectid != objectid) |
| 3519 | break; |
| 3520 | |
Josef Bacik | 18ec90d | 2012-09-28 11:56:28 -0400 | [diff] [blame] | 3521 | found_key.offset = 0; |
| 3522 | found_key.type = 0; |
| 3523 | ret = btrfs_bin_search(path->nodes[0], &found_key, 0, |
| 3524 | &start_slot); |
| 3525 | |
| 3526 | ret = btrfs_del_items(trans, log, path, start_slot, |
| 3527 | path->slots[0] - start_slot + 1); |
| 3528 | /* |
| 3529 | * If start slot isn't 0 then we don't need to re-search, we've |
| 3530 | * found the last guy with the objectid in this tree. |
| 3531 | */ |
| 3532 | if (ret || start_slot != 0) |
Tsutomu Itoh | 65a246c | 2011-05-19 04:37:44 +0000 | [diff] [blame] | 3533 | break; |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 3534 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3535 | } |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 3536 | btrfs_release_path(path); |
Josef Bacik | 5bdbeb2 | 2012-05-29 16:59:49 -0400 | [diff] [blame] | 3537 | if (ret > 0) |
| 3538 | ret = 0; |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3539 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 3540 | } |
| 3541 | |
Josef Bacik | 94edf4a | 2012-09-25 14:56:25 -0400 | [diff] [blame] | 3542 | static void fill_inode_item(struct btrfs_trans_handle *trans, |
| 3543 | struct extent_buffer *leaf, |
| 3544 | struct btrfs_inode_item *item, |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 3545 | struct inode *inode, int log_inode_only, |
| 3546 | u64 logged_isize) |
Josef Bacik | 94edf4a | 2012-09-25 14:56:25 -0400 | [diff] [blame] | 3547 | { |
Josef Bacik | 0b1c6cc | 2012-10-23 16:03:44 -0400 | [diff] [blame] | 3548 | struct btrfs_map_token token; |
Josef Bacik | 94edf4a | 2012-09-25 14:56:25 -0400 | [diff] [blame] | 3549 | |
Josef Bacik | 0b1c6cc | 2012-10-23 16:03:44 -0400 | [diff] [blame] | 3550 | btrfs_init_map_token(&token); |
Josef Bacik | 94edf4a | 2012-09-25 14:56:25 -0400 | [diff] [blame] | 3551 | |
| 3552 | if (log_inode_only) { |
| 3553 | /* set the generation to zero so the recover code |
| 3554 | * can tell the difference between an logging |
| 3555 | * just to say 'this inode exists' and a logging |
| 3556 | * to say 'update this inode with these values' |
| 3557 | */ |
Josef Bacik | 0b1c6cc | 2012-10-23 16:03:44 -0400 | [diff] [blame] | 3558 | btrfs_set_token_inode_generation(leaf, item, 0, &token); |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 3559 | btrfs_set_token_inode_size(leaf, item, logged_isize, &token); |
Josef Bacik | 94edf4a | 2012-09-25 14:56:25 -0400 | [diff] [blame] | 3560 | } else { |
Josef Bacik | 0b1c6cc | 2012-10-23 16:03:44 -0400 | [diff] [blame] | 3561 | btrfs_set_token_inode_generation(leaf, item, |
| 3562 | BTRFS_I(inode)->generation, |
| 3563 | &token); |
| 3564 | btrfs_set_token_inode_size(leaf, item, inode->i_size, &token); |
Josef Bacik | 94edf4a | 2012-09-25 14:56:25 -0400 | [diff] [blame] | 3565 | } |
| 3566 | |
Josef Bacik | 0b1c6cc | 2012-10-23 16:03:44 -0400 | [diff] [blame] | 3567 | btrfs_set_token_inode_uid(leaf, item, i_uid_read(inode), &token); |
| 3568 | btrfs_set_token_inode_gid(leaf, item, i_gid_read(inode), &token); |
| 3569 | btrfs_set_token_inode_mode(leaf, item, inode->i_mode, &token); |
| 3570 | btrfs_set_token_inode_nlink(leaf, item, inode->i_nlink, &token); |
| 3571 | |
David Sterba | a937b97 | 2014-12-12 17:39:12 +0100 | [diff] [blame] | 3572 | btrfs_set_token_timespec_sec(leaf, &item->atime, |
Josef Bacik | 0b1c6cc | 2012-10-23 16:03:44 -0400 | [diff] [blame] | 3573 | inode->i_atime.tv_sec, &token); |
David Sterba | a937b97 | 2014-12-12 17:39:12 +0100 | [diff] [blame] | 3574 | btrfs_set_token_timespec_nsec(leaf, &item->atime, |
Josef Bacik | 0b1c6cc | 2012-10-23 16:03:44 -0400 | [diff] [blame] | 3575 | inode->i_atime.tv_nsec, &token); |
| 3576 | |
David Sterba | a937b97 | 2014-12-12 17:39:12 +0100 | [diff] [blame] | 3577 | btrfs_set_token_timespec_sec(leaf, &item->mtime, |
Josef Bacik | 0b1c6cc | 2012-10-23 16:03:44 -0400 | [diff] [blame] | 3578 | inode->i_mtime.tv_sec, &token); |
David Sterba | a937b97 | 2014-12-12 17:39:12 +0100 | [diff] [blame] | 3579 | btrfs_set_token_timespec_nsec(leaf, &item->mtime, |
Josef Bacik | 0b1c6cc | 2012-10-23 16:03:44 -0400 | [diff] [blame] | 3580 | inode->i_mtime.tv_nsec, &token); |
| 3581 | |
David Sterba | a937b97 | 2014-12-12 17:39:12 +0100 | [diff] [blame] | 3582 | btrfs_set_token_timespec_sec(leaf, &item->ctime, |
Josef Bacik | 0b1c6cc | 2012-10-23 16:03:44 -0400 | [diff] [blame] | 3583 | inode->i_ctime.tv_sec, &token); |
David Sterba | a937b97 | 2014-12-12 17:39:12 +0100 | [diff] [blame] | 3584 | btrfs_set_token_timespec_nsec(leaf, &item->ctime, |
Josef Bacik | 0b1c6cc | 2012-10-23 16:03:44 -0400 | [diff] [blame] | 3585 | inode->i_ctime.tv_nsec, &token); |
| 3586 | |
| 3587 | btrfs_set_token_inode_nbytes(leaf, item, inode_get_bytes(inode), |
| 3588 | &token); |
| 3589 | |
| 3590 | btrfs_set_token_inode_sequence(leaf, item, inode->i_version, &token); |
| 3591 | btrfs_set_token_inode_transid(leaf, item, trans->transid, &token); |
| 3592 | btrfs_set_token_inode_rdev(leaf, item, inode->i_rdev, &token); |
| 3593 | btrfs_set_token_inode_flags(leaf, item, BTRFS_I(inode)->flags, &token); |
| 3594 | btrfs_set_token_inode_block_group(leaf, item, 0, &token); |
Josef Bacik | 94edf4a | 2012-09-25 14:56:25 -0400 | [diff] [blame] | 3595 | } |
| 3596 | |
Josef Bacik | a95249b | 2012-10-11 16:17:34 -0400 | [diff] [blame] | 3597 | static int log_inode_item(struct btrfs_trans_handle *trans, |
| 3598 | struct btrfs_root *log, struct btrfs_path *path, |
Nikolay Borisov | 6d889a3 | 2017-01-18 00:31:47 +0200 | [diff] [blame] | 3599 | struct btrfs_inode *inode) |
Josef Bacik | a95249b | 2012-10-11 16:17:34 -0400 | [diff] [blame] | 3600 | { |
| 3601 | struct btrfs_inode_item *inode_item; |
Josef Bacik | a95249b | 2012-10-11 16:17:34 -0400 | [diff] [blame] | 3602 | int ret; |
| 3603 | |
Filipe David Borba Manana | efd0c40 | 2013-10-07 21:20:44 +0100 | [diff] [blame] | 3604 | ret = btrfs_insert_empty_item(trans, log, path, |
Nikolay Borisov | 6d889a3 | 2017-01-18 00:31:47 +0200 | [diff] [blame] | 3605 | &inode->location, sizeof(*inode_item)); |
Josef Bacik | a95249b | 2012-10-11 16:17:34 -0400 | [diff] [blame] | 3606 | if (ret && ret != -EEXIST) |
| 3607 | return ret; |
| 3608 | inode_item = btrfs_item_ptr(path->nodes[0], path->slots[0], |
| 3609 | struct btrfs_inode_item); |
Nikolay Borisov | 6d889a3 | 2017-01-18 00:31:47 +0200 | [diff] [blame] | 3610 | fill_inode_item(trans, path->nodes[0], inode_item, &inode->vfs_inode, |
| 3611 | 0, 0); |
Josef Bacik | a95249b | 2012-10-11 16:17:34 -0400 | [diff] [blame] | 3612 | btrfs_release_path(path); |
| 3613 | return 0; |
| 3614 | } |
| 3615 | |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3616 | static noinline int copy_items(struct btrfs_trans_handle *trans, |
Nikolay Borisov | 44d70e1 | 2017-01-18 00:31:36 +0200 | [diff] [blame] | 3617 | struct btrfs_inode *inode, |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3618 | struct btrfs_path *dst_path, |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3619 | struct btrfs_path *src_path, u64 *last_extent, |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 3620 | int start_slot, int nr, int inode_only, |
| 3621 | u64 logged_isize) |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3622 | { |
Nikolay Borisov | 44d70e1 | 2017-01-18 00:31:36 +0200 | [diff] [blame] | 3623 | struct btrfs_fs_info *fs_info = btrfs_sb(inode->vfs_inode.i_sb); |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3624 | unsigned long src_offset; |
| 3625 | unsigned long dst_offset; |
Nikolay Borisov | 44d70e1 | 2017-01-18 00:31:36 +0200 | [diff] [blame] | 3626 | struct btrfs_root *log = inode->root->log_root; |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3627 | struct btrfs_file_extent_item *extent; |
| 3628 | struct btrfs_inode_item *inode_item; |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3629 | struct extent_buffer *src = src_path->nodes[0]; |
| 3630 | struct btrfs_key first_key, last_key, key; |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3631 | int ret; |
| 3632 | struct btrfs_key *ins_keys; |
| 3633 | u32 *ins_sizes; |
| 3634 | char *ins_data; |
| 3635 | int i; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 3636 | struct list_head ordered_sums; |
Nikolay Borisov | 44d70e1 | 2017-01-18 00:31:36 +0200 | [diff] [blame] | 3637 | int skip_csum = inode->flags & BTRFS_INODE_NODATASUM; |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3638 | bool has_extents = false; |
Filipe Manana | 74121f7c | 2014-08-07 12:00:44 +0100 | [diff] [blame] | 3639 | bool need_find_last_extent = true; |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3640 | bool done = false; |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 3641 | |
| 3642 | INIT_LIST_HEAD(&ordered_sums); |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3643 | |
| 3644 | ins_data = kmalloc(nr * sizeof(struct btrfs_key) + |
| 3645 | nr * sizeof(u32), GFP_NOFS); |
liubo | 2a29edc | 2011-01-26 06:22:08 +0000 | [diff] [blame] | 3646 | if (!ins_data) |
| 3647 | return -ENOMEM; |
| 3648 | |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3649 | first_key.objectid = (u64)-1; |
| 3650 | |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3651 | ins_sizes = (u32 *)ins_data; |
| 3652 | ins_keys = (struct btrfs_key *)(ins_data + nr * sizeof(u32)); |
| 3653 | |
| 3654 | for (i = 0; i < nr; i++) { |
| 3655 | ins_sizes[i] = btrfs_item_size_nr(src, i + start_slot); |
| 3656 | btrfs_item_key_to_cpu(src, ins_keys + i, i + start_slot); |
| 3657 | } |
| 3658 | ret = btrfs_insert_empty_items(trans, log, dst_path, |
| 3659 | ins_keys, ins_sizes, nr); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3660 | if (ret) { |
| 3661 | kfree(ins_data); |
| 3662 | return ret; |
| 3663 | } |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3664 | |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 3665 | for (i = 0; i < nr; i++, dst_path->slots[0]++) { |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3666 | dst_offset = btrfs_item_ptr_offset(dst_path->nodes[0], |
| 3667 | dst_path->slots[0]); |
| 3668 | |
| 3669 | src_offset = btrfs_item_ptr_offset(src, start_slot + i); |
| 3670 | |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3671 | if ((i == (nr - 1))) |
| 3672 | last_key = ins_keys[i]; |
| 3673 | |
Josef Bacik | 94edf4a | 2012-09-25 14:56:25 -0400 | [diff] [blame] | 3674 | if (ins_keys[i].type == BTRFS_INODE_ITEM_KEY) { |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3675 | inode_item = btrfs_item_ptr(dst_path->nodes[0], |
| 3676 | dst_path->slots[0], |
| 3677 | struct btrfs_inode_item); |
Josef Bacik | 94edf4a | 2012-09-25 14:56:25 -0400 | [diff] [blame] | 3678 | fill_inode_item(trans, dst_path->nodes[0], inode_item, |
Nikolay Borisov | 44d70e1 | 2017-01-18 00:31:36 +0200 | [diff] [blame] | 3679 | &inode->vfs_inode, inode_only == LOG_INODE_EXISTS, |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 3680 | logged_isize); |
Josef Bacik | 94edf4a | 2012-09-25 14:56:25 -0400 | [diff] [blame] | 3681 | } else { |
| 3682 | copy_extent_buffer(dst_path->nodes[0], src, dst_offset, |
| 3683 | src_offset, ins_sizes[i]); |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3684 | } |
Josef Bacik | 94edf4a | 2012-09-25 14:56:25 -0400 | [diff] [blame] | 3685 | |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3686 | /* |
| 3687 | * We set need_find_last_extent here in case we know we were |
| 3688 | * processing other items and then walk into the first extent in |
| 3689 | * the inode. If we don't hit an extent then nothing changes, |
| 3690 | * we'll do the last search the next time around. |
| 3691 | */ |
| 3692 | if (ins_keys[i].type == BTRFS_EXTENT_DATA_KEY) { |
| 3693 | has_extents = true; |
Filipe Manana | 74121f7c | 2014-08-07 12:00:44 +0100 | [diff] [blame] | 3694 | if (first_key.objectid == (u64)-1) |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3695 | first_key = ins_keys[i]; |
| 3696 | } else { |
| 3697 | need_find_last_extent = false; |
| 3698 | } |
| 3699 | |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3700 | /* take a reference on file data extents so that truncates |
| 3701 | * or deletes of this inode don't have to relog the inode |
| 3702 | * again |
| 3703 | */ |
David Sterba | 962a298 | 2014-06-04 18:41:45 +0200 | [diff] [blame] | 3704 | if (ins_keys[i].type == BTRFS_EXTENT_DATA_KEY && |
Liu Bo | d279440 | 2012-08-29 01:07:56 -0600 | [diff] [blame] | 3705 | !skip_csum) { |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3706 | int found_type; |
| 3707 | extent = btrfs_item_ptr(src, start_slot + i, |
| 3708 | struct btrfs_file_extent_item); |
| 3709 | |
liubo | 8e531cd | 2011-05-06 10:36:09 +0800 | [diff] [blame] | 3710 | if (btrfs_file_extent_generation(src, extent) < trans->transid) |
| 3711 | continue; |
| 3712 | |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3713 | found_type = btrfs_file_extent_type(src, extent); |
Josef Bacik | 6f1fed7 | 2012-09-26 11:07:06 -0400 | [diff] [blame] | 3714 | if (found_type == BTRFS_FILE_EXTENT_REG) { |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 3715 | u64 ds, dl, cs, cl; |
| 3716 | ds = btrfs_file_extent_disk_bytenr(src, |
| 3717 | extent); |
| 3718 | /* ds == 0 is a hole */ |
| 3719 | if (ds == 0) |
| 3720 | continue; |
| 3721 | |
| 3722 | dl = btrfs_file_extent_disk_num_bytes(src, |
| 3723 | extent); |
| 3724 | cs = btrfs_file_extent_offset(src, extent); |
| 3725 | cl = btrfs_file_extent_num_bytes(src, |
Joe Perches | a419aef | 2009-08-18 11:18:35 -0700 | [diff] [blame] | 3726 | extent); |
Chris Mason | 580afd7 | 2008-12-08 19:15:39 -0500 | [diff] [blame] | 3727 | if (btrfs_file_extent_compression(src, |
| 3728 | extent)) { |
| 3729 | cs = 0; |
| 3730 | cl = dl; |
| 3731 | } |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 3732 | |
| 3733 | ret = btrfs_lookup_csums_range( |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 3734 | fs_info->csum_root, |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 3735 | ds + cs, ds + cs + cl - 1, |
Arne Jansen | a2de733 | 2011-03-08 14:14:00 +0100 | [diff] [blame] | 3736 | &ordered_sums, 0); |
Josef Bacik | 3650860 | 2013-04-25 16:23:32 -0400 | [diff] [blame] | 3737 | if (ret) { |
| 3738 | btrfs_release_path(dst_path); |
| 3739 | kfree(ins_data); |
| 3740 | return ret; |
| 3741 | } |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3742 | } |
| 3743 | } |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3744 | } |
| 3745 | |
| 3746 | btrfs_mark_buffer_dirty(dst_path->nodes[0]); |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 3747 | btrfs_release_path(dst_path); |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3748 | kfree(ins_data); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 3749 | |
| 3750 | /* |
| 3751 | * we have to do this after the loop above to avoid changing the |
| 3752 | * log tree while trying to change the log tree. |
| 3753 | */ |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3754 | ret = 0; |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 3755 | while (!list_empty(&ordered_sums)) { |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 3756 | struct btrfs_ordered_sum *sums = list_entry(ordered_sums.next, |
| 3757 | struct btrfs_ordered_sum, |
| 3758 | list); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3759 | if (!ret) |
| 3760 | ret = btrfs_csum_file_blocks(trans, log, sums); |
Chris Mason | d20f704 | 2008-12-08 16:58:54 -0500 | [diff] [blame] | 3761 | list_del(&sums->list); |
| 3762 | kfree(sums); |
| 3763 | } |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3764 | |
| 3765 | if (!has_extents) |
| 3766 | return ret; |
| 3767 | |
Filipe Manana | 74121f7c | 2014-08-07 12:00:44 +0100 | [diff] [blame] | 3768 | if (need_find_last_extent && *last_extent == first_key.offset) { |
| 3769 | /* |
| 3770 | * We don't have any leafs between our current one and the one |
| 3771 | * we processed before that can have file extent items for our |
| 3772 | * inode (and have a generation number smaller than our current |
| 3773 | * transaction id). |
| 3774 | */ |
| 3775 | need_find_last_extent = false; |
| 3776 | } |
| 3777 | |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3778 | /* |
| 3779 | * Because we use btrfs_search_forward we could skip leaves that were |
| 3780 | * not modified and then assume *last_extent is valid when it really |
| 3781 | * isn't. So back up to the previous leaf and read the end of the last |
| 3782 | * extent before we go and fill in holes. |
| 3783 | */ |
| 3784 | if (need_find_last_extent) { |
| 3785 | u64 len; |
| 3786 | |
Nikolay Borisov | 44d70e1 | 2017-01-18 00:31:36 +0200 | [diff] [blame] | 3787 | ret = btrfs_prev_leaf(inode->root, src_path); |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3788 | if (ret < 0) |
| 3789 | return ret; |
| 3790 | if (ret) |
| 3791 | goto fill_holes; |
| 3792 | if (src_path->slots[0]) |
| 3793 | src_path->slots[0]--; |
| 3794 | src = src_path->nodes[0]; |
| 3795 | btrfs_item_key_to_cpu(src, &key, src_path->slots[0]); |
Nikolay Borisov | 44d70e1 | 2017-01-18 00:31:36 +0200 | [diff] [blame] | 3796 | if (key.objectid != btrfs_ino(inode) || |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3797 | key.type != BTRFS_EXTENT_DATA_KEY) |
| 3798 | goto fill_holes; |
| 3799 | extent = btrfs_item_ptr(src, src_path->slots[0], |
| 3800 | struct btrfs_file_extent_item); |
| 3801 | if (btrfs_file_extent_type(src, extent) == |
| 3802 | BTRFS_FILE_EXTENT_INLINE) { |
Chris Mason | 514ac8a | 2014-01-03 21:07:00 -0800 | [diff] [blame] | 3803 | len = btrfs_file_extent_inline_len(src, |
| 3804 | src_path->slots[0], |
| 3805 | extent); |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3806 | *last_extent = ALIGN(key.offset + len, |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 3807 | fs_info->sectorsize); |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3808 | } else { |
| 3809 | len = btrfs_file_extent_num_bytes(src, extent); |
| 3810 | *last_extent = key.offset + len; |
| 3811 | } |
| 3812 | } |
| 3813 | fill_holes: |
| 3814 | /* So we did prev_leaf, now we need to move to the next leaf, but a few |
| 3815 | * things could have happened |
| 3816 | * |
| 3817 | * 1) A merge could have happened, so we could currently be on a leaf |
| 3818 | * that holds what we were copying in the first place. |
| 3819 | * 2) A split could have happened, and now not all of the items we want |
| 3820 | * are on the same leaf. |
| 3821 | * |
| 3822 | * So we need to adjust how we search for holes, we need to drop the |
| 3823 | * path and re-search for the first extent key we found, and then walk |
| 3824 | * forward until we hit the last one we copied. |
| 3825 | */ |
| 3826 | if (need_find_last_extent) { |
| 3827 | /* btrfs_prev_leaf could return 1 without releasing the path */ |
| 3828 | btrfs_release_path(src_path); |
Nikolay Borisov | 44d70e1 | 2017-01-18 00:31:36 +0200 | [diff] [blame] | 3829 | ret = btrfs_search_slot(NULL, inode->root, &first_key, src_path, 0, 0); |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3830 | if (ret < 0) |
| 3831 | return ret; |
| 3832 | ASSERT(ret == 0); |
| 3833 | src = src_path->nodes[0]; |
| 3834 | i = src_path->slots[0]; |
| 3835 | } else { |
| 3836 | i = start_slot; |
| 3837 | } |
| 3838 | |
| 3839 | /* |
| 3840 | * Ok so here we need to go through and fill in any holes we may have |
| 3841 | * to make sure that holes are punched for those areas in case they had |
| 3842 | * extents previously. |
| 3843 | */ |
| 3844 | while (!done) { |
| 3845 | u64 offset, len; |
| 3846 | u64 extent_end; |
| 3847 | |
| 3848 | if (i >= btrfs_header_nritems(src_path->nodes[0])) { |
Nikolay Borisov | 44d70e1 | 2017-01-18 00:31:36 +0200 | [diff] [blame] | 3849 | ret = btrfs_next_leaf(inode->root, src_path); |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3850 | if (ret < 0) |
| 3851 | return ret; |
| 3852 | ASSERT(ret == 0); |
| 3853 | src = src_path->nodes[0]; |
| 3854 | i = 0; |
| 3855 | } |
| 3856 | |
| 3857 | btrfs_item_key_to_cpu(src, &key, i); |
| 3858 | if (!btrfs_comp_cpu_keys(&key, &last_key)) |
| 3859 | done = true; |
Nikolay Borisov | 44d70e1 | 2017-01-18 00:31:36 +0200 | [diff] [blame] | 3860 | if (key.objectid != btrfs_ino(inode) || |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3861 | key.type != BTRFS_EXTENT_DATA_KEY) { |
| 3862 | i++; |
| 3863 | continue; |
| 3864 | } |
| 3865 | extent = btrfs_item_ptr(src, i, struct btrfs_file_extent_item); |
| 3866 | if (btrfs_file_extent_type(src, extent) == |
| 3867 | BTRFS_FILE_EXTENT_INLINE) { |
Chris Mason | 514ac8a | 2014-01-03 21:07:00 -0800 | [diff] [blame] | 3868 | len = btrfs_file_extent_inline_len(src, i, extent); |
Jeff Mahoney | da17066 | 2016-06-15 09:22:56 -0400 | [diff] [blame] | 3869 | extent_end = ALIGN(key.offset + len, |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 3870 | fs_info->sectorsize); |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3871 | } else { |
| 3872 | len = btrfs_file_extent_num_bytes(src, extent); |
| 3873 | extent_end = key.offset + len; |
| 3874 | } |
| 3875 | i++; |
| 3876 | |
| 3877 | if (*last_extent == key.offset) { |
| 3878 | *last_extent = extent_end; |
| 3879 | continue; |
| 3880 | } |
| 3881 | offset = *last_extent; |
| 3882 | len = key.offset - *last_extent; |
Nikolay Borisov | 44d70e1 | 2017-01-18 00:31:36 +0200 | [diff] [blame] | 3883 | ret = btrfs_insert_file_extent(trans, log, btrfs_ino(inode), |
| 3884 | offset, 0, 0, len, 0, len, 0, 0, 0); |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3885 | if (ret) |
| 3886 | break; |
Filipe Manana | 74121f7c | 2014-08-07 12:00:44 +0100 | [diff] [blame] | 3887 | *last_extent = extent_end; |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 3888 | } |
| 3889 | /* |
| 3890 | * Need to let the callers know we dropped the path so they should |
| 3891 | * re-search. |
| 3892 | */ |
| 3893 | if (!ret && need_find_last_extent) |
| 3894 | ret = 1; |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 3895 | return ret; |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 3896 | } |
| 3897 | |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 3898 | static int extent_cmp(void *priv, struct list_head *a, struct list_head *b) |
| 3899 | { |
| 3900 | struct extent_map *em1, *em2; |
| 3901 | |
| 3902 | em1 = list_entry(a, struct extent_map, list); |
| 3903 | em2 = list_entry(b, struct extent_map, list); |
| 3904 | |
| 3905 | if (em1->start < em2->start) |
| 3906 | return -1; |
| 3907 | else if (em1->start > em2->start) |
| 3908 | return 1; |
| 3909 | return 0; |
| 3910 | } |
| 3911 | |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 3912 | static int wait_ordered_extents(struct btrfs_trans_handle *trans, |
| 3913 | struct inode *inode, |
| 3914 | struct btrfs_root *root, |
| 3915 | const struct extent_map *em, |
| 3916 | const struct list_head *logged_list, |
| 3917 | bool *ordered_io_error) |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 3918 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 3919 | struct btrfs_fs_info *fs_info = root->fs_info; |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 3920 | struct btrfs_ordered_extent *ordered; |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 3921 | struct btrfs_root *log = root->log_root; |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 3922 | u64 mod_start = em->mod_start; |
| 3923 | u64 mod_len = em->mod_len; |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 3924 | const bool skip_csum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM; |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 3925 | u64 csum_offset; |
| 3926 | u64 csum_len; |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 3927 | LIST_HEAD(ordered_sums); |
| 3928 | int ret = 0; |
Josef Bacik | 09a2a8f9 | 2013-04-05 16:51:15 -0400 | [diff] [blame] | 3929 | |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 3930 | *ordered_io_error = false; |
Josef Bacik | 70c8a91 | 2012-10-11 16:54:30 -0400 | [diff] [blame] | 3931 | |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 3932 | if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags) || |
| 3933 | em->block_start == EXTENT_MAP_HOLE) |
Josef Bacik | 70c8a91 | 2012-10-11 16:54:30 -0400 | [diff] [blame] | 3934 | return 0; |
| 3935 | |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 3936 | /* |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 3937 | * Wait far any ordered extent that covers our extent map. If it |
| 3938 | * finishes without an error, first check and see if our csums are on |
| 3939 | * our outstanding ordered extents. |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 3940 | */ |
Miao Xie | 827463c | 2014-01-14 20:31:51 +0800 | [diff] [blame] | 3941 | list_for_each_entry(ordered, logged_list, log_list) { |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 3942 | struct btrfs_ordered_sum *sum; |
| 3943 | |
| 3944 | if (!mod_len) |
| 3945 | break; |
| 3946 | |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 3947 | if (ordered->file_offset + ordered->len <= mod_start || |
| 3948 | mod_start + mod_len <= ordered->file_offset) |
| 3949 | continue; |
| 3950 | |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 3951 | if (!test_bit(BTRFS_ORDERED_IO_DONE, &ordered->flags) && |
| 3952 | !test_bit(BTRFS_ORDERED_IOERR, &ordered->flags) && |
| 3953 | !test_bit(BTRFS_ORDERED_DIRECT, &ordered->flags)) { |
| 3954 | const u64 start = ordered->file_offset; |
| 3955 | const u64 end = ordered->file_offset + ordered->len - 1; |
| 3956 | |
| 3957 | WARN_ON(ordered->inode != inode); |
| 3958 | filemap_fdatawrite_range(inode->i_mapping, start, end); |
| 3959 | } |
| 3960 | |
| 3961 | wait_event(ordered->wait, |
| 3962 | (test_bit(BTRFS_ORDERED_IO_DONE, &ordered->flags) || |
| 3963 | test_bit(BTRFS_ORDERED_IOERR, &ordered->flags))); |
| 3964 | |
| 3965 | if (test_bit(BTRFS_ORDERED_IOERR, &ordered->flags)) { |
Filipe Manana | b38ef71 | 2014-11-13 17:01:45 +0000 | [diff] [blame] | 3966 | /* |
| 3967 | * Clear the AS_EIO/AS_ENOSPC flags from the inode's |
| 3968 | * i_mapping flags, so that the next fsync won't get |
| 3969 | * an outdated io error too. |
| 3970 | */ |
Miklos Szeredi | f031221 | 2016-09-16 12:44:21 +0200 | [diff] [blame] | 3971 | filemap_check_errors(inode->i_mapping); |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 3972 | *ordered_io_error = true; |
| 3973 | break; |
| 3974 | } |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 3975 | /* |
| 3976 | * We are going to copy all the csums on this ordered extent, so |
| 3977 | * go ahead and adjust mod_start and mod_len in case this |
| 3978 | * ordered extent has already been logged. |
| 3979 | */ |
| 3980 | if (ordered->file_offset > mod_start) { |
| 3981 | if (ordered->file_offset + ordered->len >= |
| 3982 | mod_start + mod_len) |
| 3983 | mod_len = ordered->file_offset - mod_start; |
| 3984 | /* |
| 3985 | * If we have this case |
| 3986 | * |
| 3987 | * |--------- logged extent ---------| |
| 3988 | * |----- ordered extent ----| |
| 3989 | * |
| 3990 | * Just don't mess with mod_start and mod_len, we'll |
| 3991 | * just end up logging more csums than we need and it |
| 3992 | * will be ok. |
| 3993 | */ |
| 3994 | } else { |
| 3995 | if (ordered->file_offset + ordered->len < |
| 3996 | mod_start + mod_len) { |
| 3997 | mod_len = (mod_start + mod_len) - |
| 3998 | (ordered->file_offset + ordered->len); |
| 3999 | mod_start = ordered->file_offset + |
| 4000 | ordered->len; |
| 4001 | } else { |
| 4002 | mod_len = 0; |
| 4003 | } |
| 4004 | } |
| 4005 | |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 4006 | if (skip_csum) |
| 4007 | continue; |
| 4008 | |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 4009 | /* |
| 4010 | * To keep us from looping for the above case of an ordered |
| 4011 | * extent that falls inside of the logged extent. |
| 4012 | */ |
| 4013 | if (test_and_set_bit(BTRFS_ORDERED_LOGGED_CSUM, |
| 4014 | &ordered->flags)) |
| 4015 | continue; |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 4016 | |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 4017 | list_for_each_entry(sum, &ordered->list, list) { |
| 4018 | ret = btrfs_csum_file_blocks(trans, log, sum); |
Miao Xie | 827463c | 2014-01-14 20:31:51 +0800 | [diff] [blame] | 4019 | if (ret) |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 4020 | break; |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 4021 | } |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 4022 | } |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 4023 | |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 4024 | if (*ordered_io_error || !mod_len || ret || skip_csum) |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 4025 | return ret; |
| 4026 | |
Filipe David Borba Manana | 488111a | 2013-10-28 16:30:29 +0000 | [diff] [blame] | 4027 | if (em->compress_type) { |
| 4028 | csum_offset = 0; |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 4029 | csum_len = max(em->block_len, em->orig_block_len); |
Filipe David Borba Manana | 488111a | 2013-10-28 16:30:29 +0000 | [diff] [blame] | 4030 | } else { |
| 4031 | csum_offset = mod_start - em->start; |
| 4032 | csum_len = mod_len; |
| 4033 | } |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 4034 | |
Josef Bacik | 70c8a91 | 2012-10-11 16:54:30 -0400 | [diff] [blame] | 4035 | /* block start is already adjusted for the file extent offset. */ |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 4036 | ret = btrfs_lookup_csums_range(fs_info->csum_root, |
Josef Bacik | 70c8a91 | 2012-10-11 16:54:30 -0400 | [diff] [blame] | 4037 | em->block_start + csum_offset, |
| 4038 | em->block_start + csum_offset + |
| 4039 | csum_len - 1, &ordered_sums, 0); |
| 4040 | if (ret) |
| 4041 | return ret; |
| 4042 | |
| 4043 | while (!list_empty(&ordered_sums)) { |
| 4044 | struct btrfs_ordered_sum *sums = list_entry(ordered_sums.next, |
| 4045 | struct btrfs_ordered_sum, |
| 4046 | list); |
| 4047 | if (!ret) |
| 4048 | ret = btrfs_csum_file_blocks(trans, log, sums); |
| 4049 | list_del(&sums->list); |
| 4050 | kfree(sums); |
| 4051 | } |
| 4052 | |
| 4053 | return ret; |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4054 | } |
| 4055 | |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 4056 | static int log_one_extent(struct btrfs_trans_handle *trans, |
Nikolay Borisov | 9d12262 | 2017-01-18 00:31:40 +0200 | [diff] [blame] | 4057 | struct btrfs_inode *inode, struct btrfs_root *root, |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 4058 | const struct extent_map *em, |
| 4059 | struct btrfs_path *path, |
| 4060 | const struct list_head *logged_list, |
| 4061 | struct btrfs_log_ctx *ctx) |
| 4062 | { |
| 4063 | struct btrfs_root *log = root->log_root; |
| 4064 | struct btrfs_file_extent_item *fi; |
| 4065 | struct extent_buffer *leaf; |
| 4066 | struct btrfs_map_token token; |
| 4067 | struct btrfs_key key; |
| 4068 | u64 extent_offset = em->start - em->orig_start; |
| 4069 | u64 block_len; |
| 4070 | int ret; |
| 4071 | int extent_inserted = 0; |
| 4072 | bool ordered_io_err = false; |
| 4073 | |
Nikolay Borisov | 9d12262 | 2017-01-18 00:31:40 +0200 | [diff] [blame] | 4074 | ret = wait_ordered_extents(trans, &inode->vfs_inode, root, em, logged_list, |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 4075 | &ordered_io_err); |
| 4076 | if (ret) |
| 4077 | return ret; |
| 4078 | |
| 4079 | if (ordered_io_err) { |
| 4080 | ctx->io_err = -EIO; |
| 4081 | return 0; |
| 4082 | } |
| 4083 | |
| 4084 | btrfs_init_map_token(&token); |
| 4085 | |
Nikolay Borisov | 9d12262 | 2017-01-18 00:31:40 +0200 | [diff] [blame] | 4086 | ret = __btrfs_drop_extents(trans, log, &inode->vfs_inode, path, em->start, |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 4087 | em->start + em->len, NULL, 0, 1, |
| 4088 | sizeof(*fi), &extent_inserted); |
| 4089 | if (ret) |
| 4090 | return ret; |
| 4091 | |
| 4092 | if (!extent_inserted) { |
Nikolay Borisov | 9d12262 | 2017-01-18 00:31:40 +0200 | [diff] [blame] | 4093 | key.objectid = btrfs_ino(inode); |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 4094 | key.type = BTRFS_EXTENT_DATA_KEY; |
| 4095 | key.offset = em->start; |
| 4096 | |
| 4097 | ret = btrfs_insert_empty_item(trans, log, path, &key, |
| 4098 | sizeof(*fi)); |
| 4099 | if (ret) |
| 4100 | return ret; |
| 4101 | } |
| 4102 | leaf = path->nodes[0]; |
| 4103 | fi = btrfs_item_ptr(leaf, path->slots[0], |
| 4104 | struct btrfs_file_extent_item); |
| 4105 | |
Josef Bacik | 50d9aa9 | 2014-11-21 14:52:38 -0500 | [diff] [blame] | 4106 | btrfs_set_token_file_extent_generation(leaf, fi, trans->transid, |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 4107 | &token); |
| 4108 | if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) |
| 4109 | btrfs_set_token_file_extent_type(leaf, fi, |
| 4110 | BTRFS_FILE_EXTENT_PREALLOC, |
| 4111 | &token); |
| 4112 | else |
| 4113 | btrfs_set_token_file_extent_type(leaf, fi, |
| 4114 | BTRFS_FILE_EXTENT_REG, |
| 4115 | &token); |
| 4116 | |
| 4117 | block_len = max(em->block_len, em->orig_block_len); |
| 4118 | if (em->compress_type != BTRFS_COMPRESS_NONE) { |
| 4119 | btrfs_set_token_file_extent_disk_bytenr(leaf, fi, |
| 4120 | em->block_start, |
| 4121 | &token); |
| 4122 | btrfs_set_token_file_extent_disk_num_bytes(leaf, fi, block_len, |
| 4123 | &token); |
| 4124 | } else if (em->block_start < EXTENT_MAP_LAST_BYTE) { |
| 4125 | btrfs_set_token_file_extent_disk_bytenr(leaf, fi, |
| 4126 | em->block_start - |
| 4127 | extent_offset, &token); |
| 4128 | btrfs_set_token_file_extent_disk_num_bytes(leaf, fi, block_len, |
| 4129 | &token); |
| 4130 | } else { |
| 4131 | btrfs_set_token_file_extent_disk_bytenr(leaf, fi, 0, &token); |
| 4132 | btrfs_set_token_file_extent_disk_num_bytes(leaf, fi, 0, |
| 4133 | &token); |
| 4134 | } |
| 4135 | |
| 4136 | btrfs_set_token_file_extent_offset(leaf, fi, extent_offset, &token); |
| 4137 | btrfs_set_token_file_extent_num_bytes(leaf, fi, em->len, &token); |
| 4138 | btrfs_set_token_file_extent_ram_bytes(leaf, fi, em->ram_bytes, &token); |
| 4139 | btrfs_set_token_file_extent_compression(leaf, fi, em->compress_type, |
| 4140 | &token); |
| 4141 | btrfs_set_token_file_extent_encryption(leaf, fi, 0, &token); |
| 4142 | btrfs_set_token_file_extent_other_encoding(leaf, fi, 0, &token); |
| 4143 | btrfs_mark_buffer_dirty(leaf); |
| 4144 | |
| 4145 | btrfs_release_path(path); |
| 4146 | |
| 4147 | return ret; |
| 4148 | } |
| 4149 | |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4150 | static int btrfs_log_changed_extents(struct btrfs_trans_handle *trans, |
| 4151 | struct btrfs_root *root, |
Nikolay Borisov | 9d12262 | 2017-01-18 00:31:40 +0200 | [diff] [blame] | 4152 | struct btrfs_inode *inode, |
Miao Xie | 827463c | 2014-01-14 20:31:51 +0800 | [diff] [blame] | 4153 | struct btrfs_path *path, |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 4154 | struct list_head *logged_list, |
Filipe Manana | de0ee0e | 2016-01-21 10:17:54 +0000 | [diff] [blame] | 4155 | struct btrfs_log_ctx *ctx, |
| 4156 | const u64 start, |
| 4157 | const u64 end) |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4158 | { |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4159 | struct extent_map *em, *n; |
| 4160 | struct list_head extents; |
Nikolay Borisov | 9d12262 | 2017-01-18 00:31:40 +0200 | [diff] [blame] | 4161 | struct extent_map_tree *tree = &inode->extent_tree; |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4162 | u64 test_gen; |
| 4163 | int ret = 0; |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 4164 | int num = 0; |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4165 | |
| 4166 | INIT_LIST_HEAD(&extents); |
| 4167 | |
Nikolay Borisov | 9d12262 | 2017-01-18 00:31:40 +0200 | [diff] [blame] | 4168 | down_write(&inode->dio_sem); |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4169 | write_lock(&tree->lock); |
| 4170 | test_gen = root->fs_info->last_trans_committed; |
| 4171 | |
| 4172 | list_for_each_entry_safe(em, n, &tree->modified_extents, list) { |
| 4173 | list_del_init(&em->list); |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 4174 | |
| 4175 | /* |
| 4176 | * Just an arbitrary number, this can be really CPU intensive |
| 4177 | * once we start getting a lot of extents, and really once we |
| 4178 | * have a bunch of extents we just want to commit since it will |
| 4179 | * be faster. |
| 4180 | */ |
| 4181 | if (++num > 32768) { |
| 4182 | list_del_init(&tree->modified_extents); |
| 4183 | ret = -EFBIG; |
| 4184 | goto process; |
| 4185 | } |
| 4186 | |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4187 | if (em->generation <= test_gen) |
| 4188 | continue; |
Josef Bacik | ff44c6e | 2012-09-14 12:59:20 -0400 | [diff] [blame] | 4189 | /* Need a ref to keep it from getting evicted from cache */ |
| 4190 | atomic_inc(&em->refs); |
| 4191 | set_bit(EXTENT_FLAG_LOGGING, &em->flags); |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4192 | list_add_tail(&em->list, &extents); |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 4193 | num++; |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4194 | } |
| 4195 | |
| 4196 | list_sort(NULL, &extents, extent_cmp); |
Nikolay Borisov | 9d12262 | 2017-01-18 00:31:40 +0200 | [diff] [blame] | 4197 | btrfs_get_logged_extents(inode, logged_list, start, end); |
Filipe Manana | 5f9a8a5 | 2016-05-12 13:53:36 +0100 | [diff] [blame] | 4198 | /* |
| 4199 | * Some ordered extents started by fsync might have completed |
| 4200 | * before we could collect them into the list logged_list, which |
| 4201 | * means they're gone, not in our logged_list nor in the inode's |
| 4202 | * ordered tree. We want the application/user space to know an |
| 4203 | * error happened while attempting to persist file data so that |
| 4204 | * it can take proper action. If such error happened, we leave |
| 4205 | * without writing to the log tree and the fsync must report the |
| 4206 | * file data write error and not commit the current transaction. |
| 4207 | */ |
Nikolay Borisov | 9d12262 | 2017-01-18 00:31:40 +0200 | [diff] [blame] | 4208 | ret = filemap_check_errors(inode->vfs_inode.i_mapping); |
Filipe Manana | 5f9a8a5 | 2016-05-12 13:53:36 +0100 | [diff] [blame] | 4209 | if (ret) |
| 4210 | ctx->io_err = ret; |
Josef Bacik | 2ab28f3 | 2012-10-12 15:27:49 -0400 | [diff] [blame] | 4211 | process: |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4212 | while (!list_empty(&extents)) { |
| 4213 | em = list_entry(extents.next, struct extent_map, list); |
| 4214 | |
| 4215 | list_del_init(&em->list); |
| 4216 | |
| 4217 | /* |
| 4218 | * If we had an error we just need to delete everybody from our |
| 4219 | * private list. |
| 4220 | */ |
Josef Bacik | ff44c6e | 2012-09-14 12:59:20 -0400 | [diff] [blame] | 4221 | if (ret) { |
Josef Bacik | 201a903 | 2013-01-24 12:02:07 -0500 | [diff] [blame] | 4222 | clear_em_logging(tree, em); |
Josef Bacik | ff44c6e | 2012-09-14 12:59:20 -0400 | [diff] [blame] | 4223 | free_extent_map(em); |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4224 | continue; |
Josef Bacik | ff44c6e | 2012-09-14 12:59:20 -0400 | [diff] [blame] | 4225 | } |
| 4226 | |
| 4227 | write_unlock(&tree->lock); |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4228 | |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 4229 | ret = log_one_extent(trans, inode, root, em, path, logged_list, |
| 4230 | ctx); |
Josef Bacik | ff44c6e | 2012-09-14 12:59:20 -0400 | [diff] [blame] | 4231 | write_lock(&tree->lock); |
Josef Bacik | 201a903 | 2013-01-24 12:02:07 -0500 | [diff] [blame] | 4232 | clear_em_logging(tree, em); |
| 4233 | free_extent_map(em); |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4234 | } |
Josef Bacik | ff44c6e | 2012-09-14 12:59:20 -0400 | [diff] [blame] | 4235 | WARN_ON(!list_empty(&extents)); |
| 4236 | write_unlock(&tree->lock); |
Nikolay Borisov | 9d12262 | 2017-01-18 00:31:40 +0200 | [diff] [blame] | 4237 | up_write(&inode->dio_sem); |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4238 | |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4239 | btrfs_release_path(path); |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4240 | return ret; |
| 4241 | } |
| 4242 | |
Nikolay Borisov | 481b01c | 2017-01-18 00:31:34 +0200 | [diff] [blame] | 4243 | static int logged_inode_size(struct btrfs_root *log, struct btrfs_inode *inode, |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 4244 | struct btrfs_path *path, u64 *size_ret) |
| 4245 | { |
| 4246 | struct btrfs_key key; |
| 4247 | int ret; |
| 4248 | |
Nikolay Borisov | 481b01c | 2017-01-18 00:31:34 +0200 | [diff] [blame] | 4249 | key.objectid = btrfs_ino(inode); |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 4250 | key.type = BTRFS_INODE_ITEM_KEY; |
| 4251 | key.offset = 0; |
| 4252 | |
| 4253 | ret = btrfs_search_slot(NULL, log, &key, path, 0, 0); |
| 4254 | if (ret < 0) { |
| 4255 | return ret; |
| 4256 | } else if (ret > 0) { |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 4257 | *size_ret = 0; |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 4258 | } else { |
| 4259 | struct btrfs_inode_item *item; |
| 4260 | |
| 4261 | item = btrfs_item_ptr(path->nodes[0], path->slots[0], |
| 4262 | struct btrfs_inode_item); |
| 4263 | *size_ret = btrfs_inode_size(path->nodes[0], item); |
| 4264 | } |
| 4265 | |
| 4266 | btrfs_release_path(path); |
| 4267 | return 0; |
| 4268 | } |
| 4269 | |
Filipe Manana | 36283bf | 2015-06-20 00:44:51 +0100 | [diff] [blame] | 4270 | /* |
| 4271 | * At the moment we always log all xattrs. This is to figure out at log replay |
| 4272 | * time which xattrs must have their deletion replayed. If a xattr is missing |
| 4273 | * in the log tree and exists in the fs/subvol tree, we delete it. This is |
| 4274 | * because if a xattr is deleted, the inode is fsynced and a power failure |
| 4275 | * happens, causing the log to be replayed the next time the fs is mounted, |
| 4276 | * we want the xattr to not exist anymore (same behaviour as other filesystems |
| 4277 | * with a journal, ext3/4, xfs, f2fs, etc). |
| 4278 | */ |
| 4279 | static int btrfs_log_all_xattrs(struct btrfs_trans_handle *trans, |
| 4280 | struct btrfs_root *root, |
Nikolay Borisov | 1a93c36 | 2017-01-18 00:31:37 +0200 | [diff] [blame] | 4281 | struct btrfs_inode *inode, |
Filipe Manana | 36283bf | 2015-06-20 00:44:51 +0100 | [diff] [blame] | 4282 | struct btrfs_path *path, |
| 4283 | struct btrfs_path *dst_path) |
| 4284 | { |
| 4285 | int ret; |
| 4286 | struct btrfs_key key; |
Nikolay Borisov | 1a93c36 | 2017-01-18 00:31:37 +0200 | [diff] [blame] | 4287 | const u64 ino = btrfs_ino(inode); |
Filipe Manana | 36283bf | 2015-06-20 00:44:51 +0100 | [diff] [blame] | 4288 | int ins_nr = 0; |
| 4289 | int start_slot = 0; |
| 4290 | |
| 4291 | key.objectid = ino; |
| 4292 | key.type = BTRFS_XATTR_ITEM_KEY; |
| 4293 | key.offset = 0; |
| 4294 | |
| 4295 | ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); |
| 4296 | if (ret < 0) |
| 4297 | return ret; |
| 4298 | |
| 4299 | while (true) { |
| 4300 | int slot = path->slots[0]; |
| 4301 | struct extent_buffer *leaf = path->nodes[0]; |
| 4302 | int nritems = btrfs_header_nritems(leaf); |
| 4303 | |
| 4304 | if (slot >= nritems) { |
| 4305 | if (ins_nr > 0) { |
| 4306 | u64 last_extent = 0; |
| 4307 | |
Nikolay Borisov | 1a93c36 | 2017-01-18 00:31:37 +0200 | [diff] [blame] | 4308 | ret = copy_items(trans, inode, dst_path, path, |
Filipe Manana | 36283bf | 2015-06-20 00:44:51 +0100 | [diff] [blame] | 4309 | &last_extent, start_slot, |
| 4310 | ins_nr, 1, 0); |
| 4311 | /* can't be 1, extent items aren't processed */ |
| 4312 | ASSERT(ret <= 0); |
| 4313 | if (ret < 0) |
| 4314 | return ret; |
| 4315 | ins_nr = 0; |
| 4316 | } |
| 4317 | ret = btrfs_next_leaf(root, path); |
| 4318 | if (ret < 0) |
| 4319 | return ret; |
| 4320 | else if (ret > 0) |
| 4321 | break; |
| 4322 | continue; |
| 4323 | } |
| 4324 | |
| 4325 | btrfs_item_key_to_cpu(leaf, &key, slot); |
| 4326 | if (key.objectid != ino || key.type != BTRFS_XATTR_ITEM_KEY) |
| 4327 | break; |
| 4328 | |
| 4329 | if (ins_nr == 0) |
| 4330 | start_slot = slot; |
| 4331 | ins_nr++; |
| 4332 | path->slots[0]++; |
| 4333 | cond_resched(); |
| 4334 | } |
| 4335 | if (ins_nr > 0) { |
| 4336 | u64 last_extent = 0; |
| 4337 | |
Nikolay Borisov | 1a93c36 | 2017-01-18 00:31:37 +0200 | [diff] [blame] | 4338 | ret = copy_items(trans, inode, dst_path, path, |
Filipe Manana | 36283bf | 2015-06-20 00:44:51 +0100 | [diff] [blame] | 4339 | &last_extent, start_slot, |
| 4340 | ins_nr, 1, 0); |
| 4341 | /* can't be 1, extent items aren't processed */ |
| 4342 | ASSERT(ret <= 0); |
| 4343 | if (ret < 0) |
| 4344 | return ret; |
| 4345 | } |
| 4346 | |
| 4347 | return 0; |
| 4348 | } |
| 4349 | |
Filipe Manana | a89ca6f | 2015-06-25 04:17:46 +0100 | [diff] [blame] | 4350 | /* |
| 4351 | * If the no holes feature is enabled we need to make sure any hole between the |
| 4352 | * last extent and the i_size of our inode is explicitly marked in the log. This |
| 4353 | * is to make sure that doing something like: |
| 4354 | * |
| 4355 | * 1) create file with 128Kb of data |
| 4356 | * 2) truncate file to 64Kb |
| 4357 | * 3) truncate file to 256Kb |
| 4358 | * 4) fsync file |
| 4359 | * 5) <crash/power failure> |
| 4360 | * 6) mount fs and trigger log replay |
| 4361 | * |
| 4362 | * Will give us a file with a size of 256Kb, the first 64Kb of data match what |
| 4363 | * the file had in its first 64Kb of data at step 1 and the last 192Kb of the |
| 4364 | * file correspond to a hole. The presence of explicit holes in a log tree is |
| 4365 | * what guarantees that log replay will remove/adjust file extent items in the |
| 4366 | * fs/subvol tree. |
| 4367 | * |
| 4368 | * Here we do not need to care about holes between extents, that is already done |
| 4369 | * by copy_items(). We also only need to do this in the full sync path, where we |
| 4370 | * lookup for extents from the fs/subvol tree only. In the fast path case, we |
| 4371 | * lookup the list of modified extent maps and if any represents a hole, we |
| 4372 | * insert a corresponding extent representing a hole in the log tree. |
| 4373 | */ |
| 4374 | static int btrfs_log_trailing_hole(struct btrfs_trans_handle *trans, |
| 4375 | struct btrfs_root *root, |
Nikolay Borisov | a0308dd | 2017-01-18 00:31:38 +0200 | [diff] [blame] | 4376 | struct btrfs_inode *inode, |
Filipe Manana | a89ca6f | 2015-06-25 04:17:46 +0100 | [diff] [blame] | 4377 | struct btrfs_path *path) |
| 4378 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 4379 | struct btrfs_fs_info *fs_info = root->fs_info; |
Filipe Manana | a89ca6f | 2015-06-25 04:17:46 +0100 | [diff] [blame] | 4380 | int ret; |
| 4381 | struct btrfs_key key; |
| 4382 | u64 hole_start; |
| 4383 | u64 hole_size; |
| 4384 | struct extent_buffer *leaf; |
| 4385 | struct btrfs_root *log = root->log_root; |
Nikolay Borisov | a0308dd | 2017-01-18 00:31:38 +0200 | [diff] [blame] | 4386 | const u64 ino = btrfs_ino(inode); |
| 4387 | const u64 i_size = i_size_read(&inode->vfs_inode); |
Filipe Manana | a89ca6f | 2015-06-25 04:17:46 +0100 | [diff] [blame] | 4388 | |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 4389 | if (!btrfs_fs_incompat(fs_info, NO_HOLES)) |
Filipe Manana | a89ca6f | 2015-06-25 04:17:46 +0100 | [diff] [blame] | 4390 | return 0; |
| 4391 | |
| 4392 | key.objectid = ino; |
| 4393 | key.type = BTRFS_EXTENT_DATA_KEY; |
| 4394 | key.offset = (u64)-1; |
| 4395 | |
| 4396 | ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); |
| 4397 | ASSERT(ret != 0); |
| 4398 | if (ret < 0) |
| 4399 | return ret; |
| 4400 | |
| 4401 | ASSERT(path->slots[0] > 0); |
| 4402 | path->slots[0]--; |
| 4403 | leaf = path->nodes[0]; |
| 4404 | btrfs_item_key_to_cpu(leaf, &key, path->slots[0]); |
| 4405 | |
| 4406 | if (key.objectid != ino || key.type != BTRFS_EXTENT_DATA_KEY) { |
| 4407 | /* inode does not have any extents */ |
| 4408 | hole_start = 0; |
| 4409 | hole_size = i_size; |
| 4410 | } else { |
| 4411 | struct btrfs_file_extent_item *extent; |
| 4412 | u64 len; |
| 4413 | |
| 4414 | /* |
| 4415 | * If there's an extent beyond i_size, an explicit hole was |
| 4416 | * already inserted by copy_items(). |
| 4417 | */ |
| 4418 | if (key.offset >= i_size) |
| 4419 | return 0; |
| 4420 | |
| 4421 | extent = btrfs_item_ptr(leaf, path->slots[0], |
| 4422 | struct btrfs_file_extent_item); |
| 4423 | |
| 4424 | if (btrfs_file_extent_type(leaf, extent) == |
| 4425 | BTRFS_FILE_EXTENT_INLINE) { |
| 4426 | len = btrfs_file_extent_inline_len(leaf, |
| 4427 | path->slots[0], |
| 4428 | extent); |
| 4429 | ASSERT(len == i_size); |
| 4430 | return 0; |
| 4431 | } |
| 4432 | |
| 4433 | len = btrfs_file_extent_num_bytes(leaf, extent); |
| 4434 | /* Last extent goes beyond i_size, no need to log a hole. */ |
| 4435 | if (key.offset + len > i_size) |
| 4436 | return 0; |
| 4437 | hole_start = key.offset + len; |
| 4438 | hole_size = i_size - hole_start; |
| 4439 | } |
| 4440 | btrfs_release_path(path); |
| 4441 | |
| 4442 | /* Last extent ends at i_size. */ |
| 4443 | if (hole_size == 0) |
| 4444 | return 0; |
| 4445 | |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 4446 | hole_size = ALIGN(hole_size, fs_info->sectorsize); |
Filipe Manana | a89ca6f | 2015-06-25 04:17:46 +0100 | [diff] [blame] | 4447 | ret = btrfs_insert_file_extent(trans, log, ino, hole_start, 0, 0, |
| 4448 | hole_size, 0, hole_size, 0, 0, 0); |
| 4449 | return ret; |
| 4450 | } |
| 4451 | |
Filipe Manana | 56f23fd | 2016-03-30 23:37:21 +0100 | [diff] [blame] | 4452 | /* |
| 4453 | * When we are logging a new inode X, check if it doesn't have a reference that |
| 4454 | * matches the reference from some other inode Y created in a past transaction |
| 4455 | * and that was renamed in the current transaction. If we don't do this, then at |
| 4456 | * log replay time we can lose inode Y (and all its files if it's a directory): |
| 4457 | * |
| 4458 | * mkdir /mnt/x |
| 4459 | * echo "hello world" > /mnt/x/foobar |
| 4460 | * sync |
| 4461 | * mv /mnt/x /mnt/y |
| 4462 | * mkdir /mnt/x # or touch /mnt/x |
| 4463 | * xfs_io -c fsync /mnt/x |
| 4464 | * <power fail> |
| 4465 | * mount fs, trigger log replay |
| 4466 | * |
| 4467 | * After the log replay procedure, we would lose the first directory and all its |
| 4468 | * files (file foobar). |
| 4469 | * For the case where inode Y is not a directory we simply end up losing it: |
| 4470 | * |
| 4471 | * echo "123" > /mnt/foo |
| 4472 | * sync |
| 4473 | * mv /mnt/foo /mnt/bar |
| 4474 | * echo "abc" > /mnt/foo |
| 4475 | * xfs_io -c fsync /mnt/foo |
| 4476 | * <power fail> |
| 4477 | * |
| 4478 | * We also need this for cases where a snapshot entry is replaced by some other |
| 4479 | * entry (file or directory) otherwise we end up with an unreplayable log due to |
| 4480 | * attempts to delete the snapshot entry (entry of type BTRFS_ROOT_ITEM_KEY) as |
| 4481 | * if it were a regular entry: |
| 4482 | * |
| 4483 | * mkdir /mnt/x |
| 4484 | * btrfs subvolume snapshot /mnt /mnt/x/snap |
| 4485 | * btrfs subvolume delete /mnt/x/snap |
| 4486 | * rmdir /mnt/x |
| 4487 | * mkdir /mnt/x |
| 4488 | * fsync /mnt/x or fsync some new file inside it |
| 4489 | * <power fail> |
| 4490 | * |
| 4491 | * The snapshot delete, rmdir of x, mkdir of a new x and the fsync all happen in |
| 4492 | * the same transaction. |
| 4493 | */ |
| 4494 | static int btrfs_check_ref_name_override(struct extent_buffer *eb, |
| 4495 | const int slot, |
| 4496 | const struct btrfs_key *key, |
Nikolay Borisov | 4791c8f | 2017-01-18 00:31:35 +0200 | [diff] [blame] | 4497 | struct btrfs_inode *inode, |
Filipe Manana | 44f714d | 2016-06-06 16:11:13 +0100 | [diff] [blame] | 4498 | u64 *other_ino) |
Filipe Manana | 56f23fd | 2016-03-30 23:37:21 +0100 | [diff] [blame] | 4499 | { |
| 4500 | int ret; |
| 4501 | struct btrfs_path *search_path; |
| 4502 | char *name = NULL; |
| 4503 | u32 name_len = 0; |
| 4504 | u32 item_size = btrfs_item_size_nr(eb, slot); |
| 4505 | u32 cur_offset = 0; |
| 4506 | unsigned long ptr = btrfs_item_ptr_offset(eb, slot); |
| 4507 | |
| 4508 | search_path = btrfs_alloc_path(); |
| 4509 | if (!search_path) |
| 4510 | return -ENOMEM; |
| 4511 | search_path->search_commit_root = 1; |
| 4512 | search_path->skip_locking = 1; |
| 4513 | |
| 4514 | while (cur_offset < item_size) { |
| 4515 | u64 parent; |
| 4516 | u32 this_name_len; |
| 4517 | u32 this_len; |
| 4518 | unsigned long name_ptr; |
| 4519 | struct btrfs_dir_item *di; |
| 4520 | |
| 4521 | if (key->type == BTRFS_INODE_REF_KEY) { |
| 4522 | struct btrfs_inode_ref *iref; |
| 4523 | |
| 4524 | iref = (struct btrfs_inode_ref *)(ptr + cur_offset); |
| 4525 | parent = key->offset; |
| 4526 | this_name_len = btrfs_inode_ref_name_len(eb, iref); |
| 4527 | name_ptr = (unsigned long)(iref + 1); |
| 4528 | this_len = sizeof(*iref) + this_name_len; |
| 4529 | } else { |
| 4530 | struct btrfs_inode_extref *extref; |
| 4531 | |
| 4532 | extref = (struct btrfs_inode_extref *)(ptr + |
| 4533 | cur_offset); |
| 4534 | parent = btrfs_inode_extref_parent(eb, extref); |
| 4535 | this_name_len = btrfs_inode_extref_name_len(eb, extref); |
| 4536 | name_ptr = (unsigned long)&extref->name; |
| 4537 | this_len = sizeof(*extref) + this_name_len; |
| 4538 | } |
| 4539 | |
| 4540 | if (this_name_len > name_len) { |
| 4541 | char *new_name; |
| 4542 | |
| 4543 | new_name = krealloc(name, this_name_len, GFP_NOFS); |
| 4544 | if (!new_name) { |
| 4545 | ret = -ENOMEM; |
| 4546 | goto out; |
| 4547 | } |
| 4548 | name_len = this_name_len; |
| 4549 | name = new_name; |
| 4550 | } |
| 4551 | |
| 4552 | read_extent_buffer(eb, name, name_ptr, this_name_len); |
Nikolay Borisov | 4791c8f | 2017-01-18 00:31:35 +0200 | [diff] [blame] | 4553 | di = btrfs_lookup_dir_item(NULL, inode->root, search_path, |
| 4554 | parent, name, this_name_len, 0); |
Filipe Manana | 56f23fd | 2016-03-30 23:37:21 +0100 | [diff] [blame] | 4555 | if (di && !IS_ERR(di)) { |
Filipe Manana | 44f714d | 2016-06-06 16:11:13 +0100 | [diff] [blame] | 4556 | struct btrfs_key di_key; |
| 4557 | |
| 4558 | btrfs_dir_item_key_to_cpu(search_path->nodes[0], |
| 4559 | di, &di_key); |
| 4560 | if (di_key.type == BTRFS_INODE_ITEM_KEY) { |
| 4561 | ret = 1; |
| 4562 | *other_ino = di_key.objectid; |
| 4563 | } else { |
| 4564 | ret = -EAGAIN; |
| 4565 | } |
Filipe Manana | 56f23fd | 2016-03-30 23:37:21 +0100 | [diff] [blame] | 4566 | goto out; |
| 4567 | } else if (IS_ERR(di)) { |
| 4568 | ret = PTR_ERR(di); |
| 4569 | goto out; |
| 4570 | } |
| 4571 | btrfs_release_path(search_path); |
| 4572 | |
| 4573 | cur_offset += this_len; |
| 4574 | } |
| 4575 | ret = 0; |
| 4576 | out: |
| 4577 | btrfs_free_path(search_path); |
| 4578 | kfree(name); |
| 4579 | return ret; |
| 4580 | } |
| 4581 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4582 | /* log a single inode in the tree log. |
| 4583 | * At least one parent directory for this inode must exist in the tree |
| 4584 | * or be logged already. |
| 4585 | * |
| 4586 | * Any items from this inode changed by the current transaction are copied |
| 4587 | * to the log tree. An extra reference is taken on any extents in this |
| 4588 | * file, allowing us to avoid a whole pile of corner cases around logging |
| 4589 | * blocks that have been removed from the tree. |
| 4590 | * |
| 4591 | * See LOG_INODE_ALL and related defines for a description of what inode_only |
| 4592 | * does. |
| 4593 | * |
| 4594 | * This handles both files and directories. |
| 4595 | */ |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 4596 | static int btrfs_log_inode(struct btrfs_trans_handle *trans, |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4597 | struct btrfs_root *root, struct btrfs_inode *inode, |
Filipe Manana | 49dae1b | 2014-09-06 22:34:39 +0100 | [diff] [blame] | 4598 | int inode_only, |
| 4599 | const loff_t start, |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 4600 | const loff_t end, |
| 4601 | struct btrfs_log_ctx *ctx) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4602 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 4603 | struct btrfs_fs_info *fs_info = root->fs_info; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4604 | struct btrfs_path *path; |
| 4605 | struct btrfs_path *dst_path; |
| 4606 | struct btrfs_key min_key; |
| 4607 | struct btrfs_key max_key; |
| 4608 | struct btrfs_root *log = root->log_root; |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 4609 | struct extent_buffer *src = NULL; |
Miao Xie | 827463c | 2014-01-14 20:31:51 +0800 | [diff] [blame] | 4610 | LIST_HEAD(logged_list); |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 4611 | u64 last_extent = 0; |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 4612 | int err = 0; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4613 | int ret; |
Chris Mason | 3a5f1d4 | 2008-09-11 15:53:37 -0400 | [diff] [blame] | 4614 | int nritems; |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 4615 | int ins_start_slot = 0; |
| 4616 | int ins_nr; |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4617 | bool fast_search = false; |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4618 | u64 ino = btrfs_ino(inode); |
| 4619 | struct extent_map_tree *em_tree = &inode->extent_tree; |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 4620 | u64 logged_isize = 0; |
Filipe Manana | e4545de | 2015-06-17 12:49:23 +0100 | [diff] [blame] | 4621 | bool need_log_inode_item = true; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4622 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4623 | path = btrfs_alloc_path(); |
Tsutomu Itoh | 5df6708 | 2011-02-01 09:17:35 +0000 | [diff] [blame] | 4624 | if (!path) |
| 4625 | return -ENOMEM; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4626 | dst_path = btrfs_alloc_path(); |
Tsutomu Itoh | 5df6708 | 2011-02-01 09:17:35 +0000 | [diff] [blame] | 4627 | if (!dst_path) { |
| 4628 | btrfs_free_path(path); |
| 4629 | return -ENOMEM; |
| 4630 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4631 | |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 4632 | min_key.objectid = ino; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4633 | min_key.type = BTRFS_INODE_ITEM_KEY; |
| 4634 | min_key.offset = 0; |
| 4635 | |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 4636 | max_key.objectid = ino; |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 4637 | |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 4638 | |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4639 | /* today the code can only do partial logging of directories */ |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4640 | if (S_ISDIR(inode->vfs_inode.i_mode) || |
Miao Xie | 5269b67 | 2012-11-01 07:35:23 +0000 | [diff] [blame] | 4641 | (!test_bit(BTRFS_INODE_NEEDS_FULL_SYNC, |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4642 | &inode->runtime_flags) && |
Liu Bo | 781feef | 2016-11-30 16:20:25 -0800 | [diff] [blame] | 4643 | inode_only >= LOG_INODE_EXISTS)) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4644 | max_key.type = BTRFS_XATTR_ITEM_KEY; |
| 4645 | else |
| 4646 | max_key.type = (u8)-1; |
| 4647 | max_key.offset = (u64)-1; |
| 4648 | |
Filipe Manana | 2c2c452 | 2015-01-13 16:40:04 +0000 | [diff] [blame] | 4649 | /* |
| 4650 | * Only run delayed items if we are a dir or a new file. |
| 4651 | * Otherwise commit the delayed inode only, which is needed in |
| 4652 | * order for the log replay code to mark inodes for link count |
| 4653 | * fixup (create temporary BTRFS_TREE_LOG_FIXUP_OBJECTID items). |
| 4654 | */ |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4655 | if (S_ISDIR(inode->vfs_inode.i_mode) || |
| 4656 | inode->generation > fs_info->last_trans_committed) |
| 4657 | ret = btrfs_commit_inode_delayed_items(trans, inode); |
Filipe Manana | 2c2c452 | 2015-01-13 16:40:04 +0000 | [diff] [blame] | 4658 | else |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4659 | ret = btrfs_commit_inode_delayed_inode(inode); |
Filipe Manana | 2c2c452 | 2015-01-13 16:40:04 +0000 | [diff] [blame] | 4660 | |
| 4661 | if (ret) { |
| 4662 | btrfs_free_path(path); |
| 4663 | btrfs_free_path(dst_path); |
| 4664 | return ret; |
Miao Xie | 16cdcec | 2011-04-22 18:12:22 +0800 | [diff] [blame] | 4665 | } |
| 4666 | |
Liu Bo | 781feef | 2016-11-30 16:20:25 -0800 | [diff] [blame] | 4667 | if (inode_only == LOG_OTHER_INODE) { |
| 4668 | inode_only = LOG_INODE_EXISTS; |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4669 | mutex_lock_nested(&inode->log_mutex, SINGLE_DEPTH_NESTING); |
Liu Bo | 781feef | 2016-11-30 16:20:25 -0800 | [diff] [blame] | 4670 | } else { |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4671 | mutex_lock(&inode->log_mutex); |
Liu Bo | 781feef | 2016-11-30 16:20:25 -0800 | [diff] [blame] | 4672 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4673 | |
Filipe Manana | 5e33a2b | 2016-02-25 23:19:38 +0000 | [diff] [blame] | 4674 | /* |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4675 | * a brute force approach to making sure we get the most uptodate |
| 4676 | * copies of everything. |
| 4677 | */ |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4678 | if (S_ISDIR(inode->vfs_inode.i_mode)) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4679 | int max_key_type = BTRFS_DIR_LOG_INDEX_KEY; |
| 4680 | |
Filipe Manana | 4f764e5 | 2015-02-23 19:53:35 +0000 | [diff] [blame] | 4681 | if (inode_only == LOG_INODE_EXISTS) |
| 4682 | max_key_type = BTRFS_XATTR_ITEM_KEY; |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 4683 | ret = drop_objectid_items(trans, log, path, ino, max_key_type); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4684 | } else { |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 4685 | if (inode_only == LOG_INODE_EXISTS) { |
| 4686 | /* |
| 4687 | * Make sure the new inode item we write to the log has |
| 4688 | * the same isize as the current one (if it exists). |
| 4689 | * This is necessary to prevent data loss after log |
| 4690 | * replay, and also to prevent doing a wrong expanding |
| 4691 | * truncate - for e.g. create file, write 4K into offset |
| 4692 | * 0, fsync, write 4K into offset 4096, add hard link, |
| 4693 | * fsync some other file (to sync log), power fail - if |
| 4694 | * we use the inode's current i_size, after log replay |
| 4695 | * we get a 8Kb file, with the last 4Kb extent as a hole |
| 4696 | * (zeroes), as if an expanding truncate happened, |
| 4697 | * instead of getting a file of 4Kb only. |
| 4698 | */ |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4699 | err = logged_inode_size(log, inode, path, &logged_isize); |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 4700 | if (err) |
| 4701 | goto out_unlock; |
| 4702 | } |
Filipe Manana | a742994 | 2015-02-13 16:56:14 +0000 | [diff] [blame] | 4703 | if (test_bit(BTRFS_INODE_NEEDS_FULL_SYNC, |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4704 | &inode->runtime_flags)) { |
Filipe Manana | a742994 | 2015-02-13 16:56:14 +0000 | [diff] [blame] | 4705 | if (inode_only == LOG_INODE_EXISTS) { |
Filipe Manana | 4f764e5 | 2015-02-23 19:53:35 +0000 | [diff] [blame] | 4706 | max_key.type = BTRFS_XATTR_ITEM_KEY; |
Filipe Manana | a742994 | 2015-02-13 16:56:14 +0000 | [diff] [blame] | 4707 | ret = drop_objectid_items(trans, log, path, ino, |
| 4708 | max_key.type); |
| 4709 | } else { |
| 4710 | clear_bit(BTRFS_INODE_NEEDS_FULL_SYNC, |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4711 | &inode->runtime_flags); |
Filipe Manana | a742994 | 2015-02-13 16:56:14 +0000 | [diff] [blame] | 4712 | clear_bit(BTRFS_INODE_COPY_EVERYTHING, |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4713 | &inode->runtime_flags); |
Chris Mason | 28ed134 | 2014-12-17 09:41:04 -0800 | [diff] [blame] | 4714 | while(1) { |
| 4715 | ret = btrfs_truncate_inode_items(trans, |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4716 | log, &inode->vfs_inode, 0, 0); |
Chris Mason | 28ed134 | 2014-12-17 09:41:04 -0800 | [diff] [blame] | 4717 | if (ret != -EAGAIN) |
| 4718 | break; |
| 4719 | } |
Filipe Manana | a742994 | 2015-02-13 16:56:14 +0000 | [diff] [blame] | 4720 | } |
Filipe Manana | 4f764e5 | 2015-02-23 19:53:35 +0000 | [diff] [blame] | 4721 | } else if (test_and_clear_bit(BTRFS_INODE_COPY_EVERYTHING, |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4722 | &inode->runtime_flags) || |
Josef Bacik | 6cfab85 | 2013-11-12 16:25:58 -0500 | [diff] [blame] | 4723 | inode_only == LOG_INODE_EXISTS) { |
Filipe Manana | 4f764e5 | 2015-02-23 19:53:35 +0000 | [diff] [blame] | 4724 | if (inode_only == LOG_INODE_ALL) |
Josef Bacik | a95249b | 2012-10-11 16:17:34 -0400 | [diff] [blame] | 4725 | fast_search = true; |
Filipe Manana | 4f764e5 | 2015-02-23 19:53:35 +0000 | [diff] [blame] | 4726 | max_key.type = BTRFS_XATTR_ITEM_KEY; |
Josef Bacik | a95249b | 2012-10-11 16:17:34 -0400 | [diff] [blame] | 4727 | ret = drop_objectid_items(trans, log, path, ino, |
| 4728 | max_key.type); |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4729 | } else { |
Liu Bo | 183f37f | 2012-11-01 06:38:47 +0000 | [diff] [blame] | 4730 | if (inode_only == LOG_INODE_ALL) |
| 4731 | fast_search = true; |
Josef Bacik | a95249b | 2012-10-11 16:17:34 -0400 | [diff] [blame] | 4732 | goto log_extents; |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4733 | } |
Josef Bacik | a95249b | 2012-10-11 16:17:34 -0400 | [diff] [blame] | 4734 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4735 | } |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 4736 | if (ret) { |
| 4737 | err = ret; |
| 4738 | goto out_unlock; |
| 4739 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4740 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 4741 | while (1) { |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 4742 | ins_nr = 0; |
Filipe David Borba Manana | 6174d3c | 2013-10-01 16:13:42 +0100 | [diff] [blame] | 4743 | ret = btrfs_search_forward(root, &min_key, |
Eric Sandeen | de78b51 | 2013-01-31 18:21:12 +0000 | [diff] [blame] | 4744 | path, trans->transid); |
Liu Bo | fb770ae | 2016-07-05 12:10:14 -0700 | [diff] [blame] | 4745 | if (ret < 0) { |
| 4746 | err = ret; |
| 4747 | goto out_unlock; |
| 4748 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4749 | if (ret != 0) |
| 4750 | break; |
Chris Mason | 3a5f1d4 | 2008-09-11 15:53:37 -0400 | [diff] [blame] | 4751 | again: |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 4752 | /* note, ins_nr might be > 0 here, cleanup outside the loop */ |
Li Zefan | 33345d01 | 2011-04-20 10:31:50 +0800 | [diff] [blame] | 4753 | if (min_key.objectid != ino) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4754 | break; |
| 4755 | if (min_key.type > max_key.type) |
| 4756 | break; |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 4757 | |
Filipe Manana | e4545de | 2015-06-17 12:49:23 +0100 | [diff] [blame] | 4758 | if (min_key.type == BTRFS_INODE_ITEM_KEY) |
| 4759 | need_log_inode_item = false; |
| 4760 | |
Filipe Manana | 56f23fd | 2016-03-30 23:37:21 +0100 | [diff] [blame] | 4761 | if ((min_key.type == BTRFS_INODE_REF_KEY || |
| 4762 | min_key.type == BTRFS_INODE_EXTREF_KEY) && |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4763 | inode->generation == trans->transid) { |
Filipe Manana | 44f714d | 2016-06-06 16:11:13 +0100 | [diff] [blame] | 4764 | u64 other_ino = 0; |
| 4765 | |
Filipe Manana | 56f23fd | 2016-03-30 23:37:21 +0100 | [diff] [blame] | 4766 | ret = btrfs_check_ref_name_override(path->nodes[0], |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4767 | path->slots[0], &min_key, inode, |
| 4768 | &other_ino); |
Filipe Manana | 56f23fd | 2016-03-30 23:37:21 +0100 | [diff] [blame] | 4769 | if (ret < 0) { |
| 4770 | err = ret; |
| 4771 | goto out_unlock; |
Filipe Manana | 28a2359 | 2016-08-23 21:13:51 +0100 | [diff] [blame] | 4772 | } else if (ret > 0 && ctx && |
Nikolay Borisov | 4a0cc7c | 2017-01-10 20:35:31 +0200 | [diff] [blame] | 4773 | other_ino != btrfs_ino(BTRFS_I(ctx->inode))) { |
Filipe Manana | 44f714d | 2016-06-06 16:11:13 +0100 | [diff] [blame] | 4774 | struct btrfs_key inode_key; |
| 4775 | struct inode *other_inode; |
| 4776 | |
| 4777 | if (ins_nr > 0) { |
| 4778 | ins_nr++; |
| 4779 | } else { |
| 4780 | ins_nr = 1; |
| 4781 | ins_start_slot = path->slots[0]; |
| 4782 | } |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4783 | ret = copy_items(trans, inode, dst_path, path, |
Filipe Manana | 44f714d | 2016-06-06 16:11:13 +0100 | [diff] [blame] | 4784 | &last_extent, ins_start_slot, |
| 4785 | ins_nr, inode_only, |
| 4786 | logged_isize); |
| 4787 | if (ret < 0) { |
| 4788 | err = ret; |
| 4789 | goto out_unlock; |
| 4790 | } |
| 4791 | ins_nr = 0; |
| 4792 | btrfs_release_path(path); |
| 4793 | inode_key.objectid = other_ino; |
| 4794 | inode_key.type = BTRFS_INODE_ITEM_KEY; |
| 4795 | inode_key.offset = 0; |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 4796 | other_inode = btrfs_iget(fs_info->sb, |
Filipe Manana | 44f714d | 2016-06-06 16:11:13 +0100 | [diff] [blame] | 4797 | &inode_key, root, |
| 4798 | NULL); |
| 4799 | /* |
| 4800 | * If the other inode that had a conflicting dir |
| 4801 | * entry was deleted in the current transaction, |
| 4802 | * we don't need to do more work nor fallback to |
| 4803 | * a transaction commit. |
| 4804 | */ |
| 4805 | if (IS_ERR(other_inode) && |
| 4806 | PTR_ERR(other_inode) == -ENOENT) { |
| 4807 | goto next_key; |
| 4808 | } else if (IS_ERR(other_inode)) { |
| 4809 | err = PTR_ERR(other_inode); |
| 4810 | goto out_unlock; |
| 4811 | } |
| 4812 | /* |
| 4813 | * We are safe logging the other inode without |
| 4814 | * acquiring its i_mutex as long as we log with |
| 4815 | * the LOG_INODE_EXISTS mode. We're safe against |
| 4816 | * concurrent renames of the other inode as well |
| 4817 | * because during a rename we pin the log and |
| 4818 | * update the log with the new name before we |
| 4819 | * unpin it. |
| 4820 | */ |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4821 | err = btrfs_log_inode(trans, root, |
| 4822 | BTRFS_I(other_inode), |
| 4823 | LOG_OTHER_INODE, 0, LLONG_MAX, |
| 4824 | ctx); |
Filipe Manana | 44f714d | 2016-06-06 16:11:13 +0100 | [diff] [blame] | 4825 | iput(other_inode); |
| 4826 | if (err) |
| 4827 | goto out_unlock; |
| 4828 | else |
| 4829 | goto next_key; |
Filipe Manana | 56f23fd | 2016-03-30 23:37:21 +0100 | [diff] [blame] | 4830 | } |
| 4831 | } |
| 4832 | |
Filipe Manana | 36283bf | 2015-06-20 00:44:51 +0100 | [diff] [blame] | 4833 | /* Skip xattrs, we log them later with btrfs_log_all_xattrs() */ |
| 4834 | if (min_key.type == BTRFS_XATTR_ITEM_KEY) { |
| 4835 | if (ins_nr == 0) |
| 4836 | goto next_slot; |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4837 | ret = copy_items(trans, inode, dst_path, path, |
Filipe Manana | 36283bf | 2015-06-20 00:44:51 +0100 | [diff] [blame] | 4838 | &last_extent, ins_start_slot, |
| 4839 | ins_nr, inode_only, logged_isize); |
| 4840 | if (ret < 0) { |
| 4841 | err = ret; |
| 4842 | goto out_unlock; |
| 4843 | } |
| 4844 | ins_nr = 0; |
| 4845 | if (ret) { |
| 4846 | btrfs_release_path(path); |
| 4847 | continue; |
| 4848 | } |
| 4849 | goto next_slot; |
| 4850 | } |
| 4851 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4852 | src = path->nodes[0]; |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 4853 | if (ins_nr && ins_start_slot + ins_nr == path->slots[0]) { |
| 4854 | ins_nr++; |
| 4855 | goto next_slot; |
| 4856 | } else if (!ins_nr) { |
| 4857 | ins_start_slot = path->slots[0]; |
| 4858 | ins_nr = 1; |
| 4859 | goto next_slot; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4860 | } |
| 4861 | |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4862 | ret = copy_items(trans, inode, dst_path, path, &last_extent, |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 4863 | ins_start_slot, ins_nr, inode_only, |
| 4864 | logged_isize); |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 4865 | if (ret < 0) { |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 4866 | err = ret; |
| 4867 | goto out_unlock; |
Rasmus Villemoes | a71db86 | 2014-06-20 21:51:43 +0200 | [diff] [blame] | 4868 | } |
| 4869 | if (ret) { |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 4870 | ins_nr = 0; |
| 4871 | btrfs_release_path(path); |
| 4872 | continue; |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 4873 | } |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 4874 | ins_nr = 1; |
| 4875 | ins_start_slot = path->slots[0]; |
| 4876 | next_slot: |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4877 | |
Chris Mason | 3a5f1d4 | 2008-09-11 15:53:37 -0400 | [diff] [blame] | 4878 | nritems = btrfs_header_nritems(path->nodes[0]); |
| 4879 | path->slots[0]++; |
| 4880 | if (path->slots[0] < nritems) { |
| 4881 | btrfs_item_key_to_cpu(path->nodes[0], &min_key, |
| 4882 | path->slots[0]); |
| 4883 | goto again; |
| 4884 | } |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 4885 | if (ins_nr) { |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4886 | ret = copy_items(trans, inode, dst_path, path, |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 4887 | &last_extent, ins_start_slot, |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 4888 | ins_nr, inode_only, logged_isize); |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 4889 | if (ret < 0) { |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 4890 | err = ret; |
| 4891 | goto out_unlock; |
| 4892 | } |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 4893 | ret = 0; |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 4894 | ins_nr = 0; |
| 4895 | } |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 4896 | btrfs_release_path(path); |
Filipe Manana | 44f714d | 2016-06-06 16:11:13 +0100 | [diff] [blame] | 4897 | next_key: |
Filipe David Borba Manana | 3d41d70 | 2013-10-01 17:06:53 +0100 | [diff] [blame] | 4898 | if (min_key.offset < (u64)-1) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4899 | min_key.offset++; |
Filipe David Borba Manana | 3d41d70 | 2013-10-01 17:06:53 +0100 | [diff] [blame] | 4900 | } else if (min_key.type < max_key.type) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4901 | min_key.type++; |
Filipe David Borba Manana | 3d41d70 | 2013-10-01 17:06:53 +0100 | [diff] [blame] | 4902 | min_key.offset = 0; |
| 4903 | } else { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4904 | break; |
Filipe David Borba Manana | 3d41d70 | 2013-10-01 17:06:53 +0100 | [diff] [blame] | 4905 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4906 | } |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 4907 | if (ins_nr) { |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4908 | ret = copy_items(trans, inode, dst_path, path, &last_extent, |
Filipe Manana | 1a4bcf4 | 2015-02-13 12:30:56 +0000 | [diff] [blame] | 4909 | ins_start_slot, ins_nr, inode_only, |
| 4910 | logged_isize); |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 4911 | if (ret < 0) { |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 4912 | err = ret; |
| 4913 | goto out_unlock; |
| 4914 | } |
Josef Bacik | 16e7549 | 2013-10-22 12:18:51 -0400 | [diff] [blame] | 4915 | ret = 0; |
Chris Mason | 31ff1cd | 2008-09-11 16:17:57 -0400 | [diff] [blame] | 4916 | ins_nr = 0; |
| 4917 | } |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4918 | |
Filipe Manana | 36283bf | 2015-06-20 00:44:51 +0100 | [diff] [blame] | 4919 | btrfs_release_path(path); |
| 4920 | btrfs_release_path(dst_path); |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4921 | err = btrfs_log_all_xattrs(trans, root, inode, path, dst_path); |
Filipe Manana | 36283bf | 2015-06-20 00:44:51 +0100 | [diff] [blame] | 4922 | if (err) |
| 4923 | goto out_unlock; |
Filipe Manana | a89ca6f | 2015-06-25 04:17:46 +0100 | [diff] [blame] | 4924 | if (max_key.type >= BTRFS_EXTENT_DATA_KEY && !fast_search) { |
| 4925 | btrfs_release_path(path); |
| 4926 | btrfs_release_path(dst_path); |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4927 | err = btrfs_log_trailing_hole(trans, root, inode, path); |
Filipe Manana | a89ca6f | 2015-06-25 04:17:46 +0100 | [diff] [blame] | 4928 | if (err) |
| 4929 | goto out_unlock; |
| 4930 | } |
Josef Bacik | a95249b | 2012-10-11 16:17:34 -0400 | [diff] [blame] | 4931 | log_extents: |
Josef Bacik | f3b15cc | 2013-07-22 12:54:30 -0400 | [diff] [blame] | 4932 | btrfs_release_path(path); |
| 4933 | btrfs_release_path(dst_path); |
Filipe Manana | e4545de | 2015-06-17 12:49:23 +0100 | [diff] [blame] | 4934 | if (need_log_inode_item) { |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4935 | err = log_inode_item(trans, log, dst_path, inode); |
Filipe Manana | e4545de | 2015-06-17 12:49:23 +0100 | [diff] [blame] | 4936 | if (err) |
| 4937 | goto out_unlock; |
| 4938 | } |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4939 | if (fast_search) { |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4940 | ret = btrfs_log_changed_extents(trans, root, inode, dst_path, |
Filipe Manana | de0ee0e | 2016-01-21 10:17:54 +0000 | [diff] [blame] | 4941 | &logged_list, ctx, start, end); |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4942 | if (ret) { |
| 4943 | err = ret; |
| 4944 | goto out_unlock; |
| 4945 | } |
Josef Bacik | d006a04 | 2013-11-12 20:54:09 -0500 | [diff] [blame] | 4946 | } else if (inode_only == LOG_INODE_ALL) { |
Liu Bo | 06d3d22 | 2012-08-27 10:52:19 -0600 | [diff] [blame] | 4947 | struct extent_map *em, *n; |
| 4948 | |
Filipe Manana | 49dae1b | 2014-09-06 22:34:39 +0100 | [diff] [blame] | 4949 | write_lock(&em_tree->lock); |
| 4950 | /* |
| 4951 | * We can't just remove every em if we're called for a ranged |
| 4952 | * fsync - that is, one that doesn't cover the whole possible |
| 4953 | * file range (0 to LLONG_MAX). This is because we can have |
| 4954 | * em's that fall outside the range we're logging and therefore |
| 4955 | * their ordered operations haven't completed yet |
| 4956 | * (btrfs_finish_ordered_io() not invoked yet). This means we |
| 4957 | * didn't get their respective file extent item in the fs/subvol |
| 4958 | * tree yet, and need to let the next fast fsync (one which |
| 4959 | * consults the list of modified extent maps) find the em so |
| 4960 | * that it logs a matching file extent item and waits for the |
| 4961 | * respective ordered operation to complete (if it's still |
| 4962 | * running). |
| 4963 | * |
| 4964 | * Removing every em outside the range we're logging would make |
| 4965 | * the next fast fsync not log their matching file extent items, |
| 4966 | * therefore making us lose data after a log replay. |
| 4967 | */ |
| 4968 | list_for_each_entry_safe(em, n, &em_tree->modified_extents, |
| 4969 | list) { |
| 4970 | const u64 mod_end = em->mod_start + em->mod_len - 1; |
| 4971 | |
| 4972 | if (em->mod_start >= start && mod_end <= end) |
| 4973 | list_del_init(&em->list); |
| 4974 | } |
| 4975 | write_unlock(&em_tree->lock); |
Josef Bacik | 5dc562c | 2012-08-17 13:14:17 -0400 | [diff] [blame] | 4976 | } |
| 4977 | |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4978 | if (inode_only == LOG_INODE_ALL && S_ISDIR(inode->vfs_inode.i_mode)) { |
| 4979 | ret = log_directory_changes(trans, root, inode, path, dst_path, |
| 4980 | ctx); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 4981 | if (ret) { |
| 4982 | err = ret; |
| 4983 | goto out_unlock; |
| 4984 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4985 | } |
Filipe Manana | 49dae1b | 2014-09-06 22:34:39 +0100 | [diff] [blame] | 4986 | |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4987 | spin_lock(&inode->lock); |
| 4988 | inode->logged_trans = trans->transid; |
| 4989 | inode->last_log_commit = inode->last_sub_trans; |
| 4990 | spin_unlock(&inode->lock); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 4991 | out_unlock: |
Miao Xie | 827463c | 2014-01-14 20:31:51 +0800 | [diff] [blame] | 4992 | if (unlikely(err)) |
| 4993 | btrfs_put_logged_extents(&logged_list); |
| 4994 | else |
| 4995 | btrfs_submit_logged_extents(&logged_list, log); |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 4996 | mutex_unlock(&inode->log_mutex); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 4997 | |
| 4998 | btrfs_free_path(path); |
| 4999 | btrfs_free_path(dst_path); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 5000 | return err; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5001 | } |
| 5002 | |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5003 | /* |
Filipe Manana | 2be63d5 | 2016-02-12 11:34:23 +0000 | [diff] [blame] | 5004 | * Check if we must fallback to a transaction commit when logging an inode. |
| 5005 | * This must be called after logging the inode and is used only in the context |
| 5006 | * when fsyncing an inode requires the need to log some other inode - in which |
| 5007 | * case we can't lock the i_mutex of each other inode we need to log as that |
| 5008 | * can lead to deadlocks with concurrent fsync against other inodes (as we can |
| 5009 | * log inodes up or down in the hierarchy) or rename operations for example. So |
| 5010 | * we take the log_mutex of the inode after we have logged it and then check for |
| 5011 | * its last_unlink_trans value - this is safe because any task setting |
| 5012 | * last_unlink_trans must take the log_mutex and it must do this before it does |
| 5013 | * the actual unlink operation, so if we do this check before a concurrent task |
| 5014 | * sets last_unlink_trans it means we've logged a consistent version/state of |
| 5015 | * all the inode items, otherwise we are not sure and must do a transaction |
Nicholas D Steeves | 0132761 | 2016-05-19 21:18:45 -0400 | [diff] [blame] | 5016 | * commit (the concurrent task might have only updated last_unlink_trans before |
Filipe Manana | 2be63d5 | 2016-02-12 11:34:23 +0000 | [diff] [blame] | 5017 | * we logged the inode or it might have also done the unlink). |
| 5018 | */ |
| 5019 | static bool btrfs_must_commit_transaction(struct btrfs_trans_handle *trans, |
Nikolay Borisov | ab1717b | 2017-01-18 00:31:27 +0200 | [diff] [blame] | 5020 | struct btrfs_inode *inode) |
Filipe Manana | 2be63d5 | 2016-02-12 11:34:23 +0000 | [diff] [blame] | 5021 | { |
Nikolay Borisov | ab1717b | 2017-01-18 00:31:27 +0200 | [diff] [blame] | 5022 | struct btrfs_fs_info *fs_info = inode->root->fs_info; |
Filipe Manana | 2be63d5 | 2016-02-12 11:34:23 +0000 | [diff] [blame] | 5023 | bool ret = false; |
| 5024 | |
Nikolay Borisov | ab1717b | 2017-01-18 00:31:27 +0200 | [diff] [blame] | 5025 | mutex_lock(&inode->log_mutex); |
| 5026 | if (inode->last_unlink_trans > fs_info->last_trans_committed) { |
Filipe Manana | 2be63d5 | 2016-02-12 11:34:23 +0000 | [diff] [blame] | 5027 | /* |
| 5028 | * Make sure any commits to the log are forced to be full |
| 5029 | * commits. |
| 5030 | */ |
| 5031 | btrfs_set_log_full_commit(fs_info, trans); |
| 5032 | ret = true; |
| 5033 | } |
Nikolay Borisov | ab1717b | 2017-01-18 00:31:27 +0200 | [diff] [blame] | 5034 | mutex_unlock(&inode->log_mutex); |
Filipe Manana | 2be63d5 | 2016-02-12 11:34:23 +0000 | [diff] [blame] | 5035 | |
| 5036 | return ret; |
| 5037 | } |
| 5038 | |
| 5039 | /* |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5040 | * follow the dentry parent pointers up the chain and see if any |
| 5041 | * of the directories in it require a full commit before they can |
| 5042 | * be logged. Returns zero if nothing special needs to be done or 1 if |
| 5043 | * a full commit is required. |
| 5044 | */ |
| 5045 | static noinline int check_parent_dirs_for_sync(struct btrfs_trans_handle *trans, |
| 5046 | struct inode *inode, |
| 5047 | struct dentry *parent, |
| 5048 | struct super_block *sb, |
| 5049 | u64 last_committed) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5050 | { |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5051 | int ret = 0; |
Josef Bacik | 6a91221 | 2010-11-20 09:48:00 +0000 | [diff] [blame] | 5052 | struct dentry *old_parent = NULL; |
Josef Bacik | de2b530 | 2013-09-11 09:36:30 -0400 | [diff] [blame] | 5053 | struct inode *orig_inode = inode; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5054 | |
Chris Mason | af4176b | 2009-03-24 10:24:31 -0400 | [diff] [blame] | 5055 | /* |
| 5056 | * for regular files, if its inode is already on disk, we don't |
| 5057 | * have to worry about the parents at all. This is because |
| 5058 | * we can use the last_unlink_trans field to record renames |
| 5059 | * and other fun in this file. |
| 5060 | */ |
| 5061 | if (S_ISREG(inode->i_mode) && |
| 5062 | BTRFS_I(inode)->generation <= last_committed && |
| 5063 | BTRFS_I(inode)->last_unlink_trans <= last_committed) |
| 5064 | goto out; |
| 5065 | |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5066 | if (!S_ISDIR(inode->i_mode)) { |
Al Viro | fc64005 | 2016-04-10 01:33:30 -0400 | [diff] [blame] | 5067 | if (!parent || d_really_is_negative(parent) || sb != parent->d_sb) |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5068 | goto out; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 5069 | inode = d_inode(parent); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5070 | } |
| 5071 | |
| 5072 | while (1) { |
Josef Bacik | de2b530 | 2013-09-11 09:36:30 -0400 | [diff] [blame] | 5073 | /* |
| 5074 | * If we are logging a directory then we start with our inode, |
Nicholas D Steeves | 0132761 | 2016-05-19 21:18:45 -0400 | [diff] [blame] | 5075 | * not our parent's inode, so we need to skip setting the |
Josef Bacik | de2b530 | 2013-09-11 09:36:30 -0400 | [diff] [blame] | 5076 | * logged_trans so that further down in the log code we don't |
| 5077 | * think this inode has already been logged. |
| 5078 | */ |
| 5079 | if (inode != orig_inode) |
| 5080 | BTRFS_I(inode)->logged_trans = trans->transid; |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5081 | smp_mb(); |
| 5082 | |
Nikolay Borisov | ab1717b | 2017-01-18 00:31:27 +0200 | [diff] [blame] | 5083 | if (btrfs_must_commit_transaction(trans, BTRFS_I(inode))) { |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5084 | ret = 1; |
| 5085 | break; |
| 5086 | } |
| 5087 | |
Al Viro | fc64005 | 2016-04-10 01:33:30 -0400 | [diff] [blame] | 5088 | if (!parent || d_really_is_negative(parent) || sb != parent->d_sb) |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5089 | break; |
| 5090 | |
Filipe Manana | 44f714d | 2016-06-06 16:11:13 +0100 | [diff] [blame] | 5091 | if (IS_ROOT(parent)) { |
| 5092 | inode = d_inode(parent); |
Nikolay Borisov | ab1717b | 2017-01-18 00:31:27 +0200 | [diff] [blame] | 5093 | if (btrfs_must_commit_transaction(trans, BTRFS_I(inode))) |
Filipe Manana | 44f714d | 2016-06-06 16:11:13 +0100 | [diff] [blame] | 5094 | ret = 1; |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5095 | break; |
Filipe Manana | 44f714d | 2016-06-06 16:11:13 +0100 | [diff] [blame] | 5096 | } |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5097 | |
Josef Bacik | 6a91221 | 2010-11-20 09:48:00 +0000 | [diff] [blame] | 5098 | parent = dget_parent(parent); |
| 5099 | dput(old_parent); |
| 5100 | old_parent = parent; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 5101 | inode = d_inode(parent); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5102 | |
| 5103 | } |
Josef Bacik | 6a91221 | 2010-11-20 09:48:00 +0000 | [diff] [blame] | 5104 | dput(old_parent); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5105 | out: |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5106 | return ret; |
| 5107 | } |
| 5108 | |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 5109 | struct btrfs_dir_list { |
| 5110 | u64 ino; |
| 5111 | struct list_head list; |
| 5112 | }; |
| 5113 | |
| 5114 | /* |
| 5115 | * Log the inodes of the new dentries of a directory. See log_dir_items() for |
| 5116 | * details about the why it is needed. |
| 5117 | * This is a recursive operation - if an existing dentry corresponds to a |
| 5118 | * directory, that directory's new entries are logged too (same behaviour as |
| 5119 | * ext3/4, xfs, f2fs, reiserfs, nilfs2). Note that when logging the inodes |
| 5120 | * the dentries point to we do not lock their i_mutex, otherwise lockdep |
| 5121 | * complains about the following circular lock dependency / possible deadlock: |
| 5122 | * |
| 5123 | * CPU0 CPU1 |
| 5124 | * ---- ---- |
| 5125 | * lock(&type->i_mutex_dir_key#3/2); |
| 5126 | * lock(sb_internal#2); |
| 5127 | * lock(&type->i_mutex_dir_key#3/2); |
| 5128 | * lock(&sb->s_type->i_mutex_key#14); |
| 5129 | * |
| 5130 | * Where sb_internal is the lock (a counter that works as a lock) acquired by |
| 5131 | * sb_start_intwrite() in btrfs_start_transaction(). |
| 5132 | * Not locking i_mutex of the inodes is still safe because: |
| 5133 | * |
| 5134 | * 1) For regular files we log with a mode of LOG_INODE_EXISTS. It's possible |
| 5135 | * that while logging the inode new references (names) are added or removed |
| 5136 | * from the inode, leaving the logged inode item with a link count that does |
| 5137 | * not match the number of logged inode reference items. This is fine because |
| 5138 | * at log replay time we compute the real number of links and correct the |
| 5139 | * link count in the inode item (see replay_one_buffer() and |
| 5140 | * link_to_fixup_dir()); |
| 5141 | * |
| 5142 | * 2) For directories we log with a mode of LOG_INODE_ALL. It's possible that |
| 5143 | * while logging the inode's items new items with keys BTRFS_DIR_ITEM_KEY and |
| 5144 | * BTRFS_DIR_INDEX_KEY are added to fs/subvol tree and the logged inode item |
| 5145 | * has a size that doesn't match the sum of the lengths of all the logged |
| 5146 | * names. This does not result in a problem because if a dir_item key is |
| 5147 | * logged but its matching dir_index key is not logged, at log replay time we |
| 5148 | * don't use it to replay the respective name (see replay_one_name()). On the |
| 5149 | * other hand if only the dir_index key ends up being logged, the respective |
| 5150 | * name is added to the fs/subvol tree with both the dir_item and dir_index |
| 5151 | * keys created (see replay_one_name()). |
| 5152 | * The directory's inode item with a wrong i_size is not a problem as well, |
| 5153 | * since we don't use it at log replay time to set the i_size in the inode |
| 5154 | * item of the fs/subvol tree (see overwrite_item()). |
| 5155 | */ |
| 5156 | static int log_new_dir_dentries(struct btrfs_trans_handle *trans, |
| 5157 | struct btrfs_root *root, |
Nikolay Borisov | 51cc0d3 | 2017-01-18 00:31:43 +0200 | [diff] [blame] | 5158 | struct btrfs_inode *start_inode, |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 5159 | struct btrfs_log_ctx *ctx) |
| 5160 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 5161 | struct btrfs_fs_info *fs_info = root->fs_info; |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 5162 | struct btrfs_root *log = root->log_root; |
| 5163 | struct btrfs_path *path; |
| 5164 | LIST_HEAD(dir_list); |
| 5165 | struct btrfs_dir_list *dir_elem; |
| 5166 | int ret = 0; |
| 5167 | |
| 5168 | path = btrfs_alloc_path(); |
| 5169 | if (!path) |
| 5170 | return -ENOMEM; |
| 5171 | |
| 5172 | dir_elem = kmalloc(sizeof(*dir_elem), GFP_NOFS); |
| 5173 | if (!dir_elem) { |
| 5174 | btrfs_free_path(path); |
| 5175 | return -ENOMEM; |
| 5176 | } |
Nikolay Borisov | 51cc0d3 | 2017-01-18 00:31:43 +0200 | [diff] [blame] | 5177 | dir_elem->ino = btrfs_ino(start_inode); |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 5178 | list_add_tail(&dir_elem->list, &dir_list); |
| 5179 | |
| 5180 | while (!list_empty(&dir_list)) { |
| 5181 | struct extent_buffer *leaf; |
| 5182 | struct btrfs_key min_key; |
| 5183 | int nritems; |
| 5184 | int i; |
| 5185 | |
| 5186 | dir_elem = list_first_entry(&dir_list, struct btrfs_dir_list, |
| 5187 | list); |
| 5188 | if (ret) |
| 5189 | goto next_dir_inode; |
| 5190 | |
| 5191 | min_key.objectid = dir_elem->ino; |
| 5192 | min_key.type = BTRFS_DIR_ITEM_KEY; |
| 5193 | min_key.offset = 0; |
| 5194 | again: |
| 5195 | btrfs_release_path(path); |
| 5196 | ret = btrfs_search_forward(log, &min_key, path, trans->transid); |
| 5197 | if (ret < 0) { |
| 5198 | goto next_dir_inode; |
| 5199 | } else if (ret > 0) { |
| 5200 | ret = 0; |
| 5201 | goto next_dir_inode; |
| 5202 | } |
| 5203 | |
| 5204 | process_leaf: |
| 5205 | leaf = path->nodes[0]; |
| 5206 | nritems = btrfs_header_nritems(leaf); |
| 5207 | for (i = path->slots[0]; i < nritems; i++) { |
| 5208 | struct btrfs_dir_item *di; |
| 5209 | struct btrfs_key di_key; |
| 5210 | struct inode *di_inode; |
| 5211 | struct btrfs_dir_list *new_dir_elem; |
| 5212 | int log_mode = LOG_INODE_EXISTS; |
| 5213 | int type; |
| 5214 | |
| 5215 | btrfs_item_key_to_cpu(leaf, &min_key, i); |
| 5216 | if (min_key.objectid != dir_elem->ino || |
| 5217 | min_key.type != BTRFS_DIR_ITEM_KEY) |
| 5218 | goto next_dir_inode; |
| 5219 | |
| 5220 | di = btrfs_item_ptr(leaf, i, struct btrfs_dir_item); |
| 5221 | type = btrfs_dir_type(leaf, di); |
| 5222 | if (btrfs_dir_transid(leaf, di) < trans->transid && |
| 5223 | type != BTRFS_FT_DIR) |
| 5224 | continue; |
| 5225 | btrfs_dir_item_key_to_cpu(leaf, di, &di_key); |
| 5226 | if (di_key.type == BTRFS_ROOT_ITEM_KEY) |
| 5227 | continue; |
| 5228 | |
Robbie Ko | ec125cf | 2016-10-28 10:48:26 +0800 | [diff] [blame] | 5229 | btrfs_release_path(path); |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 5230 | di_inode = btrfs_iget(fs_info->sb, &di_key, root, NULL); |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 5231 | if (IS_ERR(di_inode)) { |
| 5232 | ret = PTR_ERR(di_inode); |
| 5233 | goto next_dir_inode; |
| 5234 | } |
| 5235 | |
Nikolay Borisov | 0f8939b | 2017-01-18 00:31:30 +0200 | [diff] [blame] | 5236 | if (btrfs_inode_in_log(BTRFS_I(di_inode), trans->transid)) { |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 5237 | iput(di_inode); |
Robbie Ko | ec125cf | 2016-10-28 10:48:26 +0800 | [diff] [blame] | 5238 | break; |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 5239 | } |
| 5240 | |
| 5241 | ctx->log_new_dentries = false; |
Filipe Manana | 3f9749f | 2016-04-25 04:45:02 +0100 | [diff] [blame] | 5242 | if (type == BTRFS_FT_DIR || type == BTRFS_FT_SYMLINK) |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 5243 | log_mode = LOG_INODE_ALL; |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 5244 | ret = btrfs_log_inode(trans, root, BTRFS_I(di_inode), |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 5245 | log_mode, 0, LLONG_MAX, ctx); |
Filipe Manana | 2be63d5 | 2016-02-12 11:34:23 +0000 | [diff] [blame] | 5246 | if (!ret && |
Nikolay Borisov | ab1717b | 2017-01-18 00:31:27 +0200 | [diff] [blame] | 5247 | btrfs_must_commit_transaction(trans, BTRFS_I(di_inode))) |
Filipe Manana | 2be63d5 | 2016-02-12 11:34:23 +0000 | [diff] [blame] | 5248 | ret = 1; |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 5249 | iput(di_inode); |
| 5250 | if (ret) |
| 5251 | goto next_dir_inode; |
| 5252 | if (ctx->log_new_dentries) { |
| 5253 | new_dir_elem = kmalloc(sizeof(*new_dir_elem), |
| 5254 | GFP_NOFS); |
| 5255 | if (!new_dir_elem) { |
| 5256 | ret = -ENOMEM; |
| 5257 | goto next_dir_inode; |
| 5258 | } |
| 5259 | new_dir_elem->ino = di_key.objectid; |
| 5260 | list_add_tail(&new_dir_elem->list, &dir_list); |
| 5261 | } |
| 5262 | break; |
| 5263 | } |
| 5264 | if (i == nritems) { |
| 5265 | ret = btrfs_next_leaf(log, path); |
| 5266 | if (ret < 0) { |
| 5267 | goto next_dir_inode; |
| 5268 | } else if (ret > 0) { |
| 5269 | ret = 0; |
| 5270 | goto next_dir_inode; |
| 5271 | } |
| 5272 | goto process_leaf; |
| 5273 | } |
| 5274 | if (min_key.offset < (u64)-1) { |
| 5275 | min_key.offset++; |
| 5276 | goto again; |
| 5277 | } |
| 5278 | next_dir_inode: |
| 5279 | list_del(&dir_elem->list); |
| 5280 | kfree(dir_elem); |
| 5281 | } |
| 5282 | |
| 5283 | btrfs_free_path(path); |
| 5284 | return ret; |
| 5285 | } |
| 5286 | |
Filipe Manana | 18aa092 | 2015-08-05 16:49:08 +0100 | [diff] [blame] | 5287 | static int btrfs_log_all_parents(struct btrfs_trans_handle *trans, |
| 5288 | struct inode *inode, |
| 5289 | struct btrfs_log_ctx *ctx) |
| 5290 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 5291 | struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); |
Filipe Manana | 18aa092 | 2015-08-05 16:49:08 +0100 | [diff] [blame] | 5292 | int ret; |
| 5293 | struct btrfs_path *path; |
| 5294 | struct btrfs_key key; |
| 5295 | struct btrfs_root *root = BTRFS_I(inode)->root; |
Nikolay Borisov | 4a0cc7c | 2017-01-10 20:35:31 +0200 | [diff] [blame] | 5296 | const u64 ino = btrfs_ino(BTRFS_I(inode)); |
Filipe Manana | 18aa092 | 2015-08-05 16:49:08 +0100 | [diff] [blame] | 5297 | |
| 5298 | path = btrfs_alloc_path(); |
| 5299 | if (!path) |
| 5300 | return -ENOMEM; |
| 5301 | path->skip_locking = 1; |
| 5302 | path->search_commit_root = 1; |
| 5303 | |
| 5304 | key.objectid = ino; |
| 5305 | key.type = BTRFS_INODE_REF_KEY; |
| 5306 | key.offset = 0; |
| 5307 | ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); |
| 5308 | if (ret < 0) |
| 5309 | goto out; |
| 5310 | |
| 5311 | while (true) { |
| 5312 | struct extent_buffer *leaf = path->nodes[0]; |
| 5313 | int slot = path->slots[0]; |
| 5314 | u32 cur_offset = 0; |
| 5315 | u32 item_size; |
| 5316 | unsigned long ptr; |
| 5317 | |
| 5318 | if (slot >= btrfs_header_nritems(leaf)) { |
| 5319 | ret = btrfs_next_leaf(root, path); |
| 5320 | if (ret < 0) |
| 5321 | goto out; |
| 5322 | else if (ret > 0) |
| 5323 | break; |
| 5324 | continue; |
| 5325 | } |
| 5326 | |
| 5327 | btrfs_item_key_to_cpu(leaf, &key, slot); |
| 5328 | /* BTRFS_INODE_EXTREF_KEY is BTRFS_INODE_REF_KEY + 1 */ |
| 5329 | if (key.objectid != ino || key.type > BTRFS_INODE_EXTREF_KEY) |
| 5330 | break; |
| 5331 | |
| 5332 | item_size = btrfs_item_size_nr(leaf, slot); |
| 5333 | ptr = btrfs_item_ptr_offset(leaf, slot); |
| 5334 | while (cur_offset < item_size) { |
| 5335 | struct btrfs_key inode_key; |
| 5336 | struct inode *dir_inode; |
| 5337 | |
| 5338 | inode_key.type = BTRFS_INODE_ITEM_KEY; |
| 5339 | inode_key.offset = 0; |
| 5340 | |
| 5341 | if (key.type == BTRFS_INODE_EXTREF_KEY) { |
| 5342 | struct btrfs_inode_extref *extref; |
| 5343 | |
| 5344 | extref = (struct btrfs_inode_extref *) |
| 5345 | (ptr + cur_offset); |
| 5346 | inode_key.objectid = btrfs_inode_extref_parent( |
| 5347 | leaf, extref); |
| 5348 | cur_offset += sizeof(*extref); |
| 5349 | cur_offset += btrfs_inode_extref_name_len(leaf, |
| 5350 | extref); |
| 5351 | } else { |
| 5352 | inode_key.objectid = key.offset; |
| 5353 | cur_offset = item_size; |
| 5354 | } |
| 5355 | |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 5356 | dir_inode = btrfs_iget(fs_info->sb, &inode_key, |
Filipe Manana | 18aa092 | 2015-08-05 16:49:08 +0100 | [diff] [blame] | 5357 | root, NULL); |
| 5358 | /* If parent inode was deleted, skip it. */ |
| 5359 | if (IS_ERR(dir_inode)) |
| 5360 | continue; |
| 5361 | |
Filipe Manana | 657ed1a | 2016-04-06 17:11:56 +0100 | [diff] [blame] | 5362 | if (ctx) |
| 5363 | ctx->log_new_dentries = false; |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 5364 | ret = btrfs_log_inode(trans, root, BTRFS_I(dir_inode), |
Filipe Manana | 18aa092 | 2015-08-05 16:49:08 +0100 | [diff] [blame] | 5365 | LOG_INODE_ALL, 0, LLONG_MAX, ctx); |
Filipe Manana | 2be63d5 | 2016-02-12 11:34:23 +0000 | [diff] [blame] | 5366 | if (!ret && |
Nikolay Borisov | ab1717b | 2017-01-18 00:31:27 +0200 | [diff] [blame] | 5367 | btrfs_must_commit_transaction(trans, BTRFS_I(dir_inode))) |
Filipe Manana | 2be63d5 | 2016-02-12 11:34:23 +0000 | [diff] [blame] | 5368 | ret = 1; |
Filipe Manana | 657ed1a | 2016-04-06 17:11:56 +0100 | [diff] [blame] | 5369 | if (!ret && ctx && ctx->log_new_dentries) |
| 5370 | ret = log_new_dir_dentries(trans, root, |
Nikolay Borisov | 51cc0d3 | 2017-01-18 00:31:43 +0200 | [diff] [blame] | 5371 | BTRFS_I(dir_inode), ctx); |
Filipe Manana | 18aa092 | 2015-08-05 16:49:08 +0100 | [diff] [blame] | 5372 | iput(dir_inode); |
| 5373 | if (ret) |
| 5374 | goto out; |
| 5375 | } |
| 5376 | path->slots[0]++; |
| 5377 | } |
| 5378 | ret = 0; |
| 5379 | out: |
| 5380 | btrfs_free_path(path); |
| 5381 | return ret; |
| 5382 | } |
| 5383 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5384 | /* |
| 5385 | * helper function around btrfs_log_inode to make sure newly created |
| 5386 | * parent directories also end up in the log. A minimal inode and backref |
| 5387 | * only logging is done of any parent directories that are older than |
| 5388 | * the last committed transaction |
| 5389 | */ |
Eric Sandeen | 48a3b63 | 2013-04-25 20:41:01 +0000 | [diff] [blame] | 5390 | static int btrfs_log_inode_parent(struct btrfs_trans_handle *trans, |
| 5391 | struct btrfs_root *root, struct inode *inode, |
Filipe Manana | 49dae1b | 2014-09-06 22:34:39 +0100 | [diff] [blame] | 5392 | struct dentry *parent, |
| 5393 | const loff_t start, |
| 5394 | const loff_t end, |
| 5395 | int exists_only, |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 5396 | struct btrfs_log_ctx *ctx) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5397 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 5398 | struct btrfs_fs_info *fs_info = root->fs_info; |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5399 | int inode_only = exists_only ? LOG_INODE_EXISTS : LOG_INODE_ALL; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5400 | struct super_block *sb; |
Josef Bacik | 6a91221 | 2010-11-20 09:48:00 +0000 | [diff] [blame] | 5401 | struct dentry *old_parent = NULL; |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5402 | int ret = 0; |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 5403 | u64 last_committed = fs_info->last_trans_committed; |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 5404 | bool log_dentries = false; |
| 5405 | struct inode *orig_inode = inode; |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5406 | |
| 5407 | sb = inode->i_sb; |
| 5408 | |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 5409 | if (btrfs_test_opt(fs_info, NOTREELOG)) { |
Sage Weil | 3a5e140 | 2009-04-02 16:49:40 -0400 | [diff] [blame] | 5410 | ret = 1; |
| 5411 | goto end_no_trans; |
| 5412 | } |
| 5413 | |
Miao Xie | 995946d | 2014-04-02 19:51:06 +0800 | [diff] [blame] | 5414 | /* |
| 5415 | * The prev transaction commit doesn't complete, we need do |
| 5416 | * full commit by ourselves. |
| 5417 | */ |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 5418 | if (fs_info->last_trans_log_full_commit > |
| 5419 | fs_info->last_trans_committed) { |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5420 | ret = 1; |
| 5421 | goto end_no_trans; |
| 5422 | } |
| 5423 | |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 5424 | if (root != BTRFS_I(inode)->root || |
| 5425 | btrfs_root_refs(&root->root_item) == 0) { |
| 5426 | ret = 1; |
| 5427 | goto end_no_trans; |
| 5428 | } |
| 5429 | |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5430 | ret = check_parent_dirs_for_sync(trans, inode, parent, |
| 5431 | sb, last_committed); |
| 5432 | if (ret) |
| 5433 | goto end_no_trans; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5434 | |
Nikolay Borisov | 0f8939b | 2017-01-18 00:31:30 +0200 | [diff] [blame] | 5435 | if (btrfs_inode_in_log(BTRFS_I(inode), trans->transid)) { |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 5436 | ret = BTRFS_NO_LOG_SYNC; |
| 5437 | goto end_no_trans; |
| 5438 | } |
| 5439 | |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 5440 | ret = start_log_trans(trans, root, ctx); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 5441 | if (ret) |
Miao Xie | e87ac13 | 2014-02-20 18:08:53 +0800 | [diff] [blame] | 5442 | goto end_no_trans; |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5443 | |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 5444 | ret = btrfs_log_inode(trans, root, BTRFS_I(inode), inode_only, |
| 5445 | start, end, ctx); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 5446 | if (ret) |
| 5447 | goto end_trans; |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5448 | |
Chris Mason | af4176b | 2009-03-24 10:24:31 -0400 | [diff] [blame] | 5449 | /* |
| 5450 | * for regular files, if its inode is already on disk, we don't |
| 5451 | * have to worry about the parents at all. This is because |
| 5452 | * we can use the last_unlink_trans field to record renames |
| 5453 | * and other fun in this file. |
| 5454 | */ |
| 5455 | if (S_ISREG(inode->i_mode) && |
| 5456 | BTRFS_I(inode)->generation <= last_committed && |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 5457 | BTRFS_I(inode)->last_unlink_trans <= last_committed) { |
| 5458 | ret = 0; |
| 5459 | goto end_trans; |
| 5460 | } |
Chris Mason | af4176b | 2009-03-24 10:24:31 -0400 | [diff] [blame] | 5461 | |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 5462 | if (S_ISDIR(inode->i_mode) && ctx && ctx->log_new_dentries) |
| 5463 | log_dentries = true; |
| 5464 | |
Filipe Manana | 18aa092 | 2015-08-05 16:49:08 +0100 | [diff] [blame] | 5465 | /* |
Nicholas D Steeves | 0132761 | 2016-05-19 21:18:45 -0400 | [diff] [blame] | 5466 | * On unlink we must make sure all our current and old parent directory |
Filipe Manana | 18aa092 | 2015-08-05 16:49:08 +0100 | [diff] [blame] | 5467 | * inodes are fully logged. This is to prevent leaving dangling |
| 5468 | * directory index entries in directories that were our parents but are |
| 5469 | * not anymore. Not doing this results in old parent directory being |
| 5470 | * impossible to delete after log replay (rmdir will always fail with |
| 5471 | * error -ENOTEMPTY). |
| 5472 | * |
| 5473 | * Example 1: |
| 5474 | * |
| 5475 | * mkdir testdir |
| 5476 | * touch testdir/foo |
| 5477 | * ln testdir/foo testdir/bar |
| 5478 | * sync |
| 5479 | * unlink testdir/bar |
| 5480 | * xfs_io -c fsync testdir/foo |
| 5481 | * <power failure> |
| 5482 | * mount fs, triggers log replay |
| 5483 | * |
| 5484 | * If we don't log the parent directory (testdir), after log replay the |
| 5485 | * directory still has an entry pointing to the file inode using the bar |
| 5486 | * name, but a matching BTRFS_INODE_[REF|EXTREF]_KEY does not exist and |
| 5487 | * the file inode has a link count of 1. |
| 5488 | * |
| 5489 | * Example 2: |
| 5490 | * |
| 5491 | * mkdir testdir |
| 5492 | * touch foo |
| 5493 | * ln foo testdir/foo2 |
| 5494 | * ln foo testdir/foo3 |
| 5495 | * sync |
| 5496 | * unlink testdir/foo3 |
| 5497 | * xfs_io -c fsync foo |
| 5498 | * <power failure> |
| 5499 | * mount fs, triggers log replay |
| 5500 | * |
| 5501 | * Similar as the first example, after log replay the parent directory |
| 5502 | * testdir still has an entry pointing to the inode file with name foo3 |
| 5503 | * but the file inode does not have a matching BTRFS_INODE_REF_KEY item |
| 5504 | * and has a link count of 2. |
| 5505 | */ |
| 5506 | if (BTRFS_I(inode)->last_unlink_trans > last_committed) { |
| 5507 | ret = btrfs_log_all_parents(trans, orig_inode, ctx); |
| 5508 | if (ret) |
| 5509 | goto end_trans; |
| 5510 | } |
| 5511 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 5512 | while (1) { |
Al Viro | fc64005 | 2016-04-10 01:33:30 -0400 | [diff] [blame] | 5513 | if (!parent || d_really_is_negative(parent) || sb != parent->d_sb) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5514 | break; |
| 5515 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 5516 | inode = d_inode(parent); |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 5517 | if (root != BTRFS_I(inode)->root) |
| 5518 | break; |
| 5519 | |
Filipe Manana | 18aa092 | 2015-08-05 16:49:08 +0100 | [diff] [blame] | 5520 | if (BTRFS_I(inode)->generation > last_committed) { |
Nikolay Borisov | a59108a | 2017-01-18 00:31:48 +0200 | [diff] [blame^] | 5521 | ret = btrfs_log_inode(trans, root, BTRFS_I(inode), |
Filipe Manana | 18aa092 | 2015-08-05 16:49:08 +0100 | [diff] [blame] | 5522 | LOG_INODE_EXISTS, |
Filipe Manana | 8407f55 | 2014-09-05 15:14:39 +0100 | [diff] [blame] | 5523 | 0, LLONG_MAX, ctx); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 5524 | if (ret) |
| 5525 | goto end_trans; |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5526 | } |
Yan, Zheng | 76dda93 | 2009-09-21 16:00:26 -0400 | [diff] [blame] | 5527 | if (IS_ROOT(parent)) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5528 | break; |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5529 | |
Josef Bacik | 6a91221 | 2010-11-20 09:48:00 +0000 | [diff] [blame] | 5530 | parent = dget_parent(parent); |
| 5531 | dput(old_parent); |
| 5532 | old_parent = parent; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5533 | } |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 5534 | if (log_dentries) |
Nikolay Borisov | 51cc0d3 | 2017-01-18 00:31:43 +0200 | [diff] [blame] | 5535 | ret = log_new_dir_dentries(trans, root, BTRFS_I(orig_inode), ctx); |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 5536 | else |
| 5537 | ret = 0; |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 5538 | end_trans: |
Josef Bacik | 6a91221 | 2010-11-20 09:48:00 +0000 | [diff] [blame] | 5539 | dput(old_parent); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 5540 | if (ret < 0) { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 5541 | btrfs_set_log_full_commit(fs_info, trans); |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 5542 | ret = 1; |
| 5543 | } |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 5544 | |
| 5545 | if (ret) |
| 5546 | btrfs_remove_log_ctx(root, ctx); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5547 | btrfs_end_log_trans(root); |
| 5548 | end_no_trans: |
| 5549 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5550 | } |
| 5551 | |
| 5552 | /* |
| 5553 | * it is not safe to log dentry if the chunk root has added new |
| 5554 | * chunks. This returns 0 if the dentry was logged, and 1 otherwise. |
| 5555 | * If this returns 1, you must commit the transaction to safely get your |
| 5556 | * data on disk. |
| 5557 | */ |
| 5558 | int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans, |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 5559 | struct btrfs_root *root, struct dentry *dentry, |
Filipe Manana | 49dae1b | 2014-09-06 22:34:39 +0100 | [diff] [blame] | 5560 | const loff_t start, |
| 5561 | const loff_t end, |
Miao Xie | 8b050d3 | 2014-02-20 18:08:58 +0800 | [diff] [blame] | 5562 | struct btrfs_log_ctx *ctx) |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5563 | { |
Josef Bacik | 6a91221 | 2010-11-20 09:48:00 +0000 | [diff] [blame] | 5564 | struct dentry *parent = dget_parent(dentry); |
| 5565 | int ret; |
| 5566 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 5567 | ret = btrfs_log_inode_parent(trans, root, d_inode(dentry), parent, |
Filipe Manana | 49dae1b | 2014-09-06 22:34:39 +0100 | [diff] [blame] | 5568 | start, end, 0, ctx); |
Josef Bacik | 6a91221 | 2010-11-20 09:48:00 +0000 | [diff] [blame] | 5569 | dput(parent); |
| 5570 | |
| 5571 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5572 | } |
| 5573 | |
| 5574 | /* |
| 5575 | * should be called during mount to recover any replay any log trees |
| 5576 | * from the FS |
| 5577 | */ |
| 5578 | int btrfs_recover_log_trees(struct btrfs_root *log_root_tree) |
| 5579 | { |
| 5580 | int ret; |
| 5581 | struct btrfs_path *path; |
| 5582 | struct btrfs_trans_handle *trans; |
| 5583 | struct btrfs_key key; |
| 5584 | struct btrfs_key found_key; |
| 5585 | struct btrfs_key tmp_key; |
| 5586 | struct btrfs_root *log; |
| 5587 | struct btrfs_fs_info *fs_info = log_root_tree->fs_info; |
| 5588 | struct walk_control wc = { |
| 5589 | .process_func = process_one_buffer, |
| 5590 | .stage = 0, |
| 5591 | }; |
| 5592 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5593 | path = btrfs_alloc_path(); |
Tsutomu Itoh | db5b493 | 2011-03-23 08:14:16 +0000 | [diff] [blame] | 5594 | if (!path) |
| 5595 | return -ENOMEM; |
| 5596 | |
Josef Bacik | afcdd12 | 2016-09-02 15:40:02 -0400 | [diff] [blame] | 5597 | set_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5598 | |
Yan, Zheng | 4a500fd | 2010-05-16 10:49:59 -0400 | [diff] [blame] | 5599 | trans = btrfs_start_transaction(fs_info->tree_root, 0); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 5600 | if (IS_ERR(trans)) { |
| 5601 | ret = PTR_ERR(trans); |
| 5602 | goto error; |
| 5603 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5604 | |
| 5605 | wc.trans = trans; |
| 5606 | wc.pin = 1; |
| 5607 | |
Tsutomu Itoh | db5b493 | 2011-03-23 08:14:16 +0000 | [diff] [blame] | 5608 | ret = walk_log_tree(trans, log_root_tree, &wc); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 5609 | if (ret) { |
Jeff Mahoney | 5d163e0 | 2016-09-20 10:05:00 -0400 | [diff] [blame] | 5610 | btrfs_handle_fs_error(fs_info, ret, |
| 5611 | "Failed to pin buffers while recovering log root tree."); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 5612 | goto error; |
| 5613 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5614 | |
| 5615 | again: |
| 5616 | key.objectid = BTRFS_TREE_LOG_OBJECTID; |
| 5617 | key.offset = (u64)-1; |
David Sterba | 962a298 | 2014-06-04 18:41:45 +0200 | [diff] [blame] | 5618 | key.type = BTRFS_ROOT_ITEM_KEY; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5619 | |
Chris Mason | d397712 | 2009-01-05 21:25:51 -0500 | [diff] [blame] | 5620 | while (1) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5621 | ret = btrfs_search_slot(NULL, log_root_tree, &key, path, 0, 0); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 5622 | |
| 5623 | if (ret < 0) { |
Anand Jain | 34d9700 | 2016-03-16 16:43:06 +0800 | [diff] [blame] | 5624 | btrfs_handle_fs_error(fs_info, ret, |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 5625 | "Couldn't find tree log root."); |
| 5626 | goto error; |
| 5627 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5628 | if (ret > 0) { |
| 5629 | if (path->slots[0] == 0) |
| 5630 | break; |
| 5631 | path->slots[0]--; |
| 5632 | } |
| 5633 | btrfs_item_key_to_cpu(path->nodes[0], &found_key, |
| 5634 | path->slots[0]); |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 5635 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5636 | if (found_key.objectid != BTRFS_TREE_LOG_OBJECTID) |
| 5637 | break; |
| 5638 | |
Miao Xie | cb517ea | 2013-05-15 07:48:19 +0000 | [diff] [blame] | 5639 | log = btrfs_read_fs_root(log_root_tree, &found_key); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 5640 | if (IS_ERR(log)) { |
| 5641 | ret = PTR_ERR(log); |
Anand Jain | 34d9700 | 2016-03-16 16:43:06 +0800 | [diff] [blame] | 5642 | btrfs_handle_fs_error(fs_info, ret, |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 5643 | "Couldn't read tree log root."); |
| 5644 | goto error; |
| 5645 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5646 | |
| 5647 | tmp_key.objectid = found_key.offset; |
| 5648 | tmp_key.type = BTRFS_ROOT_ITEM_KEY; |
| 5649 | tmp_key.offset = (u64)-1; |
| 5650 | |
| 5651 | wc.replay_dest = btrfs_read_fs_root_no_name(fs_info, &tmp_key); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 5652 | if (IS_ERR(wc.replay_dest)) { |
| 5653 | ret = PTR_ERR(wc.replay_dest); |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 5654 | free_extent_buffer(log->node); |
| 5655 | free_extent_buffer(log->commit_root); |
| 5656 | kfree(log); |
Jeff Mahoney | 5d163e0 | 2016-09-20 10:05:00 -0400 | [diff] [blame] | 5657 | btrfs_handle_fs_error(fs_info, ret, |
| 5658 | "Couldn't read target root for tree log recovery."); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 5659 | goto error; |
| 5660 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5661 | |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 5662 | wc.replay_dest->log_root = log; |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 5663 | btrfs_record_root_in_trans(trans, wc.replay_dest); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5664 | ret = walk_log_tree(trans, log, &wc); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5665 | |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 5666 | if (!ret && wc.stage == LOG_WALK_REPLAY_ALL) { |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5667 | ret = fixup_inode_link_counts(trans, wc.replay_dest, |
| 5668 | path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5669 | } |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5670 | |
| 5671 | key.offset = found_key.offset - 1; |
Yan Zheng | 07d400a | 2009-01-06 11:42:00 -0500 | [diff] [blame] | 5672 | wc.replay_dest->log_root = NULL; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5673 | free_extent_buffer(log->node); |
Chris Mason | b263c2c | 2009-06-11 11:24:47 -0400 | [diff] [blame] | 5674 | free_extent_buffer(log->commit_root); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5675 | kfree(log); |
| 5676 | |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 5677 | if (ret) |
| 5678 | goto error; |
| 5679 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5680 | if (found_key.offset == 0) |
| 5681 | break; |
| 5682 | } |
David Sterba | b3b4aa7 | 2011-04-21 01:20:15 +0200 | [diff] [blame] | 5683 | btrfs_release_path(path); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5684 | |
| 5685 | /* step one is to pin it all, step two is to replay just inodes */ |
| 5686 | if (wc.pin) { |
| 5687 | wc.pin = 0; |
| 5688 | wc.process_func = replay_one_buffer; |
| 5689 | wc.stage = LOG_WALK_REPLAY_INODES; |
| 5690 | goto again; |
| 5691 | } |
| 5692 | /* step three is to replay everything */ |
| 5693 | if (wc.stage < LOG_WALK_REPLAY_ALL) { |
| 5694 | wc.stage++; |
| 5695 | goto again; |
| 5696 | } |
| 5697 | |
| 5698 | btrfs_free_path(path); |
| 5699 | |
Josef Bacik | abefa55 | 2013-04-24 16:40:05 -0400 | [diff] [blame] | 5700 | /* step 4: commit the transaction, which also unpins the blocks */ |
Jeff Mahoney | 3a45bb2 | 2016-09-09 21:39:03 -0400 | [diff] [blame] | 5701 | ret = btrfs_commit_transaction(trans); |
Josef Bacik | abefa55 | 2013-04-24 16:40:05 -0400 | [diff] [blame] | 5702 | if (ret) |
| 5703 | return ret; |
| 5704 | |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5705 | free_extent_buffer(log_root_tree->node); |
| 5706 | log_root_tree->log_root = NULL; |
Josef Bacik | afcdd12 | 2016-09-02 15:40:02 -0400 | [diff] [blame] | 5707 | clear_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags); |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5708 | kfree(log_root_tree); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 5709 | |
Josef Bacik | abefa55 | 2013-04-24 16:40:05 -0400 | [diff] [blame] | 5710 | return 0; |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 5711 | error: |
Josef Bacik | b50c6e2 | 2013-04-25 15:55:30 -0400 | [diff] [blame] | 5712 | if (wc.trans) |
Jeff Mahoney | 3a45bb2 | 2016-09-09 21:39:03 -0400 | [diff] [blame] | 5713 | btrfs_end_transaction(wc.trans); |
Jeff Mahoney | 79787ea | 2012-03-12 16:03:00 +0100 | [diff] [blame] | 5714 | btrfs_free_path(path); |
| 5715 | return ret; |
Chris Mason | e02119d | 2008-09-05 16:13:11 -0400 | [diff] [blame] | 5716 | } |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5717 | |
| 5718 | /* |
| 5719 | * there are some corner cases where we want to force a full |
| 5720 | * commit instead of allowing a directory to be logged. |
| 5721 | * |
| 5722 | * They revolve around files there were unlinked from the directory, and |
| 5723 | * this function updates the parent directory so that a full commit is |
| 5724 | * properly done if it is fsync'd later after the unlinks are done. |
Filipe Manana | 2be63d5 | 2016-02-12 11:34:23 +0000 | [diff] [blame] | 5725 | * |
| 5726 | * Must be called before the unlink operations (updates to the subvolume tree, |
| 5727 | * inodes, etc) are done. |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5728 | */ |
| 5729 | void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans, |
Nikolay Borisov | 4176bdb | 2017-01-18 00:31:28 +0200 | [diff] [blame] | 5730 | struct btrfs_inode *dir, struct btrfs_inode *inode, |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5731 | int for_rename) |
| 5732 | { |
| 5733 | /* |
Chris Mason | af4176b | 2009-03-24 10:24:31 -0400 | [diff] [blame] | 5734 | * when we're logging a file, if it hasn't been renamed |
| 5735 | * or unlinked, and its inode is fully committed on disk, |
| 5736 | * we don't have to worry about walking up the directory chain |
| 5737 | * to log its parents. |
| 5738 | * |
| 5739 | * So, we use the last_unlink_trans field to put this transid |
| 5740 | * into the file. When the file is logged we check it and |
| 5741 | * don't log the parents if the file is fully on disk. |
| 5742 | */ |
Nikolay Borisov | 4176bdb | 2017-01-18 00:31:28 +0200 | [diff] [blame] | 5743 | mutex_lock(&inode->log_mutex); |
| 5744 | inode->last_unlink_trans = trans->transid; |
| 5745 | mutex_unlock(&inode->log_mutex); |
Chris Mason | af4176b | 2009-03-24 10:24:31 -0400 | [diff] [blame] | 5746 | |
| 5747 | /* |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5748 | * if this directory was already logged any new |
| 5749 | * names for this file/dir will get recorded |
| 5750 | */ |
| 5751 | smp_mb(); |
Nikolay Borisov | 4176bdb | 2017-01-18 00:31:28 +0200 | [diff] [blame] | 5752 | if (dir->logged_trans == trans->transid) |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5753 | return; |
| 5754 | |
| 5755 | /* |
| 5756 | * if the inode we're about to unlink was logged, |
| 5757 | * the log will be properly updated for any new names |
| 5758 | */ |
Nikolay Borisov | 4176bdb | 2017-01-18 00:31:28 +0200 | [diff] [blame] | 5759 | if (inode->logged_trans == trans->transid) |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5760 | return; |
| 5761 | |
| 5762 | /* |
| 5763 | * when renaming files across directories, if the directory |
| 5764 | * there we're unlinking from gets fsync'd later on, there's |
| 5765 | * no way to find the destination directory later and fsync it |
| 5766 | * properly. So, we have to be conservative and force commits |
| 5767 | * so the new name gets discovered. |
| 5768 | */ |
| 5769 | if (for_rename) |
| 5770 | goto record; |
| 5771 | |
| 5772 | /* we can safely do the unlink without any special recording */ |
| 5773 | return; |
| 5774 | |
| 5775 | record: |
Nikolay Borisov | 4176bdb | 2017-01-18 00:31:28 +0200 | [diff] [blame] | 5776 | mutex_lock(&dir->log_mutex); |
| 5777 | dir->last_unlink_trans = trans->transid; |
| 5778 | mutex_unlock(&dir->log_mutex); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5779 | } |
| 5780 | |
| 5781 | /* |
Filipe Manana | 1ec9a1a | 2016-02-10 10:42:25 +0000 | [diff] [blame] | 5782 | * Make sure that if someone attempts to fsync the parent directory of a deleted |
| 5783 | * snapshot, it ends up triggering a transaction commit. This is to guarantee |
| 5784 | * that after replaying the log tree of the parent directory's root we will not |
| 5785 | * see the snapshot anymore and at log replay time we will not see any log tree |
| 5786 | * corresponding to the deleted snapshot's root, which could lead to replaying |
| 5787 | * it after replaying the log tree of the parent directory (which would replay |
| 5788 | * the snapshot delete operation). |
Filipe Manana | 2be63d5 | 2016-02-12 11:34:23 +0000 | [diff] [blame] | 5789 | * |
| 5790 | * Must be called before the actual snapshot destroy operation (updates to the |
| 5791 | * parent root and tree of tree roots trees, etc) are done. |
Filipe Manana | 1ec9a1a | 2016-02-10 10:42:25 +0000 | [diff] [blame] | 5792 | */ |
| 5793 | void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans, |
Nikolay Borisov | 4366355 | 2017-01-18 00:31:29 +0200 | [diff] [blame] | 5794 | struct btrfs_inode *dir) |
Filipe Manana | 1ec9a1a | 2016-02-10 10:42:25 +0000 | [diff] [blame] | 5795 | { |
Nikolay Borisov | 4366355 | 2017-01-18 00:31:29 +0200 | [diff] [blame] | 5796 | mutex_lock(&dir->log_mutex); |
| 5797 | dir->last_unlink_trans = trans->transid; |
| 5798 | mutex_unlock(&dir->log_mutex); |
Filipe Manana | 1ec9a1a | 2016-02-10 10:42:25 +0000 | [diff] [blame] | 5799 | } |
| 5800 | |
| 5801 | /* |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5802 | * Call this after adding a new name for a file and it will properly |
| 5803 | * update the log to reflect the new name. |
| 5804 | * |
| 5805 | * It will return zero if all goes well, and it will return 1 if a |
| 5806 | * full transaction commit is required. |
| 5807 | */ |
| 5808 | int btrfs_log_new_name(struct btrfs_trans_handle *trans, |
Nikolay Borisov | 9ca5fbfb | 2017-01-18 00:31:31 +0200 | [diff] [blame] | 5809 | struct btrfs_inode *inode, struct btrfs_inode *old_dir, |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5810 | struct dentry *parent) |
| 5811 | { |
Nikolay Borisov | 9ca5fbfb | 2017-01-18 00:31:31 +0200 | [diff] [blame] | 5812 | struct btrfs_fs_info *fs_info = btrfs_sb(inode->vfs_inode.i_sb); |
| 5813 | struct btrfs_root * root = inode->root; |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5814 | |
| 5815 | /* |
Chris Mason | af4176b | 2009-03-24 10:24:31 -0400 | [diff] [blame] | 5816 | * this will force the logging code to walk the dentry chain |
| 5817 | * up for the file |
| 5818 | */ |
Nikolay Borisov | 9ca5fbfb | 2017-01-18 00:31:31 +0200 | [diff] [blame] | 5819 | if (S_ISREG(inode->vfs_inode.i_mode)) |
| 5820 | inode->last_unlink_trans = trans->transid; |
Chris Mason | af4176b | 2009-03-24 10:24:31 -0400 | [diff] [blame] | 5821 | |
| 5822 | /* |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5823 | * if this inode hasn't been logged and directory we're renaming it |
| 5824 | * from hasn't been logged, we don't need to log it |
| 5825 | */ |
Nikolay Borisov | 9ca5fbfb | 2017-01-18 00:31:31 +0200 | [diff] [blame] | 5826 | if (inode->logged_trans <= fs_info->last_trans_committed && |
| 5827 | (!old_dir || old_dir->logged_trans <= fs_info->last_trans_committed)) |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5828 | return 0; |
| 5829 | |
Nikolay Borisov | 9ca5fbfb | 2017-01-18 00:31:31 +0200 | [diff] [blame] | 5830 | return btrfs_log_inode_parent(trans, root, &inode->vfs_inode, parent, 0, |
Filipe Manana | 49dae1b | 2014-09-06 22:34:39 +0100 | [diff] [blame] | 5831 | LLONG_MAX, 1, NULL); |
Chris Mason | 12fcfd2 | 2009-03-24 10:24:20 -0400 | [diff] [blame] | 5832 | } |
| 5833 | |