Chris Mason | 6cbd557 | 2007-06-12 09:07:21 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 Oracle. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public |
| 6 | * License v2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public |
| 14 | * License along with this program; if not, write to the |
| 15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 16 | * Boston, MA 021110-1307, USA. |
| 17 | */ |
| 18 | |
Chris Mason | dc17ff8 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 19 | #ifndef __BTRFS_TRANSACTION__ |
| 20 | #define __BTRFS_TRANSACTION__ |
Chris Mason | 31f3c99 | 2007-04-30 15:25:45 -0400 | [diff] [blame] | 21 | #include "btrfs_inode.h" |
Chris Mason | 56bec29 | 2009-03-13 10:10:06 -0400 | [diff] [blame] | 22 | #include "delayed-ref.h" |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 23 | #include "ctree.h" |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 24 | |
Miao Xie | 4a9d8bd | 2013-05-17 03:53:43 +0000 | [diff] [blame] | 25 | enum btrfs_trans_state { |
| 26 | TRANS_STATE_RUNNING = 0, |
| 27 | TRANS_STATE_BLOCKED = 1, |
| 28 | TRANS_STATE_COMMIT_START = 2, |
| 29 | TRANS_STATE_COMMIT_DOING = 3, |
| 30 | TRANS_STATE_UNBLOCKED = 4, |
| 31 | TRANS_STATE_COMPLETED = 5, |
| 32 | TRANS_STATE_MAX = 6, |
| 33 | }; |
| 34 | |
Josef Bacik | 3204d33 | 2015-09-24 10:46:10 -0400 | [diff] [blame] | 35 | #define BTRFS_TRANS_HAVE_FREE_BGS 0 |
| 36 | #define BTRFS_TRANS_DIRTY_BG_RUN 1 |
Josef Bacik | 2968b1f | 2015-10-01 12:55:18 -0400 | [diff] [blame] | 37 | #define BTRFS_TRANS_CACHE_ENOSPC 2 |
Josef Bacik | 3204d33 | 2015-09-24 10:46:10 -0400 | [diff] [blame] | 38 | |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 39 | struct btrfs_transaction { |
| 40 | u64 transid; |
Chris Mason | b7ec40d | 2009-03-12 20:12:45 -0400 | [diff] [blame] | 41 | /* |
Miao Xie | 0860adf | 2013-05-15 07:48:27 +0000 | [diff] [blame] | 42 | * total external writers(USERSPACE/START/ATTACH) in this |
| 43 | * transaction, it must be zero before the transaction is |
| 44 | * being committed |
| 45 | */ |
| 46 | atomic_t num_extwriters; |
| 47 | /* |
Chris Mason | b7ec40d | 2009-03-12 20:12:45 -0400 | [diff] [blame] | 48 | * total writers in this transaction, it must be zero before the |
| 49 | * transaction can end |
| 50 | */ |
Josef Bacik | 13c5a93 | 2011-04-11 15:45:29 -0400 | [diff] [blame] | 51 | atomic_t num_writers; |
Josef Bacik | a4abeea | 2011-04-11 17:25:13 -0400 | [diff] [blame] | 52 | atomic_t use_count; |
Josef Bacik | 161c3549 | 2015-09-24 16:17:39 -0400 | [diff] [blame] | 53 | atomic_t pending_ordered; |
Chris Mason | b7ec40d | 2009-03-12 20:12:45 -0400 | [diff] [blame] | 54 | |
Josef Bacik | 3204d33 | 2015-09-24 10:46:10 -0400 | [diff] [blame] | 55 | unsigned long flags; |
Zhao Lei | 13212b5 | 2015-02-12 14:18:17 +0800 | [diff] [blame] | 56 | |
Miao Xie | 4a9d8bd | 2013-05-17 03:53:43 +0000 | [diff] [blame] | 57 | /* Be protected by fs_info->trans_lock when we want to change it. */ |
| 58 | enum btrfs_trans_state state; |
Chris Mason | 8fd1779 | 2007-04-19 21:01:03 -0400 | [diff] [blame] | 59 | struct list_head list; |
Chris Mason | d1310b2 | 2008-01-24 16:13:08 -0500 | [diff] [blame] | 60 | struct extent_io_tree dirty_pages; |
Chris Mason | 08607c1 | 2007-06-08 15:33:54 -0400 | [diff] [blame] | 61 | unsigned long start_time; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 62 | wait_queue_head_t writer_wait; |
| 63 | wait_queue_head_t commit_wait; |
Josef Bacik | 161c3549 | 2015-09-24 16:17:39 -0400 | [diff] [blame] | 64 | wait_queue_head_t pending_wait; |
Chris Mason | 3063d29 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 65 | struct list_head pending_snapshots; |
Josef Bacik | 6df9a95 | 2013-06-27 13:22:46 -0400 | [diff] [blame] | 66 | struct list_head pending_chunks; |
Josef Bacik | 9e351cc | 2014-03-13 15:42:13 -0400 | [diff] [blame] | 67 | struct list_head switch_commits; |
Josef Bacik | ce93ec5 | 2014-11-17 15:45:48 -0500 | [diff] [blame] | 68 | struct list_head dirty_bgs; |
Chris Mason | 1bbc621 | 2015-04-06 12:46:08 -0700 | [diff] [blame] | 69 | struct list_head io_bgs; |
Josef Bacik | 2b9dbef | 2015-09-15 10:07:04 -0400 | [diff] [blame] | 70 | struct list_head dropped_roots; |
Josef Bacik | cb723e4 | 2015-02-18 08:06:57 -0800 | [diff] [blame] | 71 | u64 num_dirty_bgs; |
Chris Mason | 1bbc621 | 2015-04-06 12:46:08 -0700 | [diff] [blame] | 72 | |
| 73 | /* |
| 74 | * we need to make sure block group deletion doesn't race with |
| 75 | * free space cache writeout. This mutex keeps them from stomping |
| 76 | * on each other |
| 77 | */ |
| 78 | struct mutex cache_write_mutex; |
Josef Bacik | ce93ec5 | 2014-11-17 15:45:48 -0500 | [diff] [blame] | 79 | spinlock_t dirty_bgs_lock; |
Jeff Mahoney | e33e17e | 2015-06-15 09:41:19 -0400 | [diff] [blame] | 80 | struct list_head deleted_bgs; |
| 81 | spinlock_t deleted_bgs_lock; |
Josef Bacik | 2b9dbef | 2015-09-15 10:07:04 -0400 | [diff] [blame] | 82 | spinlock_t dropped_roots_lock; |
Chris Mason | 56bec29 | 2009-03-13 10:10:06 -0400 | [diff] [blame] | 83 | struct btrfs_delayed_ref_root delayed_refs; |
Jeff Mahoney | 49b25e0 | 2012-03-01 17:24:58 +0100 | [diff] [blame] | 84 | int aborted; |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 85 | }; |
| 86 | |
Miao Xie | 0860adf | 2013-05-15 07:48:27 +0000 | [diff] [blame] | 87 | #define __TRANS_FREEZABLE (1U << 0) |
| 88 | |
| 89 | #define __TRANS_USERSPACE (1U << 8) |
| 90 | #define __TRANS_START (1U << 9) |
| 91 | #define __TRANS_ATTACH (1U << 10) |
| 92 | #define __TRANS_JOIN (1U << 11) |
| 93 | #define __TRANS_JOIN_NOLOCK (1U << 12) |
Josef Bacik | faa2dbf | 2014-05-07 17:06:09 -0400 | [diff] [blame] | 94 | #define __TRANS_DUMMY (1U << 13) |
Miao Xie | 0860adf | 2013-05-15 07:48:27 +0000 | [diff] [blame] | 95 | |
| 96 | #define TRANS_USERSPACE (__TRANS_USERSPACE | __TRANS_FREEZABLE) |
| 97 | #define TRANS_START (__TRANS_START | __TRANS_FREEZABLE) |
| 98 | #define TRANS_ATTACH (__TRANS_ATTACH) |
| 99 | #define TRANS_JOIN (__TRANS_JOIN | __TRANS_FREEZABLE) |
| 100 | #define TRANS_JOIN_NOLOCK (__TRANS_JOIN_NOLOCK) |
| 101 | |
| 102 | #define TRANS_EXTWRITERS (__TRANS_USERSPACE | __TRANS_START | \ |
| 103 | __TRANS_ATTACH) |
Miao Xie | a698d075 | 2012-09-20 01:51:59 -0600 | [diff] [blame] | 104 | |
David Sterba | 2755a0d | 2014-07-31 00:43:18 +0200 | [diff] [blame] | 105 | #define BTRFS_SEND_TRANS_STUB ((void *)1) |
Josef Bacik | a26e8c9 | 2014-03-28 17:07:27 -0400 | [diff] [blame] | 106 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 107 | struct btrfs_trans_handle { |
| 108 | u64 transid; |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 109 | u64 bytes_reserved; |
Filipe Manana | 4fbcdf6 | 2015-05-20 14:01:54 +0100 | [diff] [blame] | 110 | u64 chunk_bytes_reserved; |
Josef Bacik | 2a1eb46 | 2011-04-13 15:15:59 -0400 | [diff] [blame] | 111 | unsigned long use_count; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 112 | unsigned long blocks_reserved; |
| 113 | unsigned long blocks_used; |
Chris Mason | 56bec29 | 2009-03-13 10:10:06 -0400 | [diff] [blame] | 114 | unsigned long delayed_ref_updates; |
Yan, Zheng | f0486c6 | 2010-05-16 10:46:25 -0400 | [diff] [blame] | 115 | struct btrfs_transaction *transaction; |
| 116 | struct btrfs_block_rsv *block_rsv; |
Josef Bacik | 2a1eb46 | 2011-04-13 15:15:59 -0400 | [diff] [blame] | 117 | struct btrfs_block_rsv *orig_rsv; |
Miao Xie | a698d075 | 2012-09-20 01:51:59 -0600 | [diff] [blame] | 118 | short aborted; |
| 119 | short adding_csums; |
Josef Bacik | c6b305a | 2012-12-18 09:16:16 -0500 | [diff] [blame] | 120 | bool allocating_chunk; |
Filipe Manana | d9a0540 | 2015-10-03 13:13:13 +0100 | [diff] [blame] | 121 | bool can_flush_pending_bgs; |
Miao Xie | 20dd2cb | 2013-09-25 21:47:45 +0800 | [diff] [blame] | 122 | bool reloc_reserved; |
Josef Bacik | 5039edd | 2014-01-15 13:34:13 -0500 | [diff] [blame] | 123 | bool sync; |
Miao Xie | 0860adf | 2013-05-15 07:48:27 +0000 | [diff] [blame] | 124 | unsigned int type; |
Arne Jansen | d13603e | 2011-09-13 11:40:09 +0200 | [diff] [blame] | 125 | /* |
| 126 | * this root is only needed to validate that the root passed to |
| 127 | * start_transaction is the same as the one passed to end_transaction. |
| 128 | * Subvolume quota depends on this |
| 129 | */ |
| 130 | struct btrfs_root *root; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 131 | struct seq_list delayed_ref_elem; |
| 132 | struct list_head qgroup_ref_list; |
Josef Bacik | ea658ba | 2012-09-11 16:57:25 -0400 | [diff] [blame] | 133 | struct list_head new_bgs; |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 134 | }; |
| 135 | |
Chris Mason | 3063d29 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 136 | struct btrfs_pending_snapshot { |
Chris Mason | 3de4586 | 2008-11-17 21:02:50 -0500 | [diff] [blame] | 137 | struct dentry *dentry; |
Miao Xie | e9662f7 | 2013-02-28 10:01:15 +0000 | [diff] [blame] | 138 | struct inode *dir; |
Chris Mason | 3063d29 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 139 | struct btrfs_root *root; |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 140 | struct btrfs_root *snap; |
Arne Jansen | 6f72c7e | 2011-09-14 15:58:21 +0200 | [diff] [blame] | 141 | struct btrfs_qgroup_inherit *inherit; |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 142 | /* block reservation for the operation */ |
| 143 | struct btrfs_block_rsv block_rsv; |
Miao Xie | d5c1207 | 2013-02-28 10:04:33 +0000 | [diff] [blame] | 144 | u64 qgroup_reserved; |
Yan, Zheng | a22285a | 2010-05-16 10:48:46 -0400 | [diff] [blame] | 145 | /* extra metadata reseration for relocation */ |
| 146 | int error; |
Li Zefan | b83cc96 | 2010-12-20 16:04:08 +0800 | [diff] [blame] | 147 | bool readonly; |
Chris Mason | 3063d29 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 148 | struct list_head list; |
| 149 | }; |
| 150 | |
Josef Bacik | 15ee9bc | 2007-08-10 16:22:09 -0400 | [diff] [blame] | 151 | static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans, |
| 152 | struct inode *inode) |
| 153 | { |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 154 | spin_lock(&BTRFS_I(inode)->lock); |
Josef Bacik | 15ee9bc | 2007-08-10 16:22:09 -0400 | [diff] [blame] | 155 | BTRFS_I(inode)->last_trans = trans->transaction->transid; |
Chris Mason | 257c62e | 2009-10-13 13:21:08 -0400 | [diff] [blame] | 156 | BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid; |
Liu Bo | 46d8bc3 | 2012-08-29 01:07:55 -0600 | [diff] [blame] | 157 | BTRFS_I(inode)->last_log_commit = BTRFS_I(inode)->root->last_log_commit; |
Filipe Manana | 2f2ff0e | 2015-03-20 17:19:46 +0000 | [diff] [blame] | 158 | spin_unlock(&BTRFS_I(inode)->lock); |
Josef Bacik | 15ee9bc | 2007-08-10 16:22:09 -0400 | [diff] [blame] | 159 | } |
| 160 | |
Qu Wenruo | 9086db8 | 2015-04-20 09:53:50 +0800 | [diff] [blame] | 161 | /* |
| 162 | * Make qgroup codes to skip given qgroupid, means the old/new_roots for |
| 163 | * qgroup won't contain the qgroupid in it. |
| 164 | */ |
| 165 | static inline void btrfs_set_skip_qgroup(struct btrfs_trans_handle *trans, |
| 166 | u64 qgroupid) |
| 167 | { |
| 168 | struct btrfs_delayed_ref_root *delayed_refs; |
| 169 | |
| 170 | delayed_refs = &trans->transaction->delayed_refs; |
| 171 | WARN_ON(delayed_refs->qgroup_to_skip); |
| 172 | delayed_refs->qgroup_to_skip = qgroupid; |
| 173 | } |
| 174 | |
| 175 | static inline void btrfs_clear_skip_qgroup(struct btrfs_trans_handle *trans) |
| 176 | { |
| 177 | struct btrfs_delayed_ref_root *delayed_refs; |
| 178 | |
| 179 | delayed_refs = &trans->transaction->delayed_refs; |
| 180 | WARN_ON(!delayed_refs->qgroup_to_skip); |
| 181 | delayed_refs->qgroup_to_skip = 0; |
| 182 | } |
| 183 | |
Chris Mason | 79154b1 | 2007-03-22 15:59:16 -0400 | [diff] [blame] | 184 | int btrfs_end_transaction(struct btrfs_trans_handle *trans, |
| 185 | struct btrfs_root *root); |
| 186 | struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, |
Alexandru Moise | 5aed1dd | 2015-09-22 20:59:15 +0000 | [diff] [blame] | 187 | unsigned int num_items); |
Filipe Manana | 8eab77f | 2015-11-13 23:57:16 +0000 | [diff] [blame] | 188 | struct btrfs_trans_handle *btrfs_start_transaction_fallback_global_rsv( |
| 189 | struct btrfs_root *root, |
| 190 | unsigned int num_items, |
| 191 | int min_factor); |
Miao Xie | 08e007d | 2012-10-16 11:33:38 +0000 | [diff] [blame] | 192 | struct btrfs_trans_handle *btrfs_start_transaction_lflush( |
Alexandru Moise | 5aed1dd | 2015-09-22 20:59:15 +0000 | [diff] [blame] | 193 | struct btrfs_root *root, |
| 194 | unsigned int num_items); |
Josef Bacik | 7a7eaa4 | 2011-04-13 12:54:33 -0400 | [diff] [blame] | 195 | struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root); |
| 196 | struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root); |
Miao Xie | 354aa0f | 2012-09-20 01:54:00 -0600 | [diff] [blame] | 197 | struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root); |
Miao Xie | d4edf39 | 2013-02-20 09:17:06 +0000 | [diff] [blame] | 198 | struct btrfs_trans_handle *btrfs_attach_transaction_barrier( |
| 199 | struct btrfs_root *root); |
Josef Bacik | 7a7eaa4 | 2011-04-13 12:54:33 -0400 | [diff] [blame] | 200 | struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root); |
Sage Weil | 4620459 | 2010-10-29 15:41:32 -0400 | [diff] [blame] | 201 | int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid); |
Chris Mason | 08607c1 | 2007-06-08 15:33:54 -0400 | [diff] [blame] | 202 | |
Josef Bacik | cfad392 | 2013-07-25 15:11:47 -0400 | [diff] [blame] | 203 | void btrfs_add_dead_root(struct btrfs_root *root); |
Eric Sandeen | de78b51 | 2013-01-31 18:21:12 +0000 | [diff] [blame] | 204 | int btrfs_defrag_root(struct btrfs_root *root); |
David Sterba | 9d1a2a3 | 2013-03-12 15:13:28 +0000 | [diff] [blame] | 205 | int btrfs_clean_one_deleted_snapshot(struct btrfs_root *root); |
Chris Mason | 5f39d39 | 2007-10-15 16:14:19 -0400 | [diff] [blame] | 206 | int btrfs_commit_transaction(struct btrfs_trans_handle *trans, |
| 207 | struct btrfs_root *root); |
Sage Weil | bb9c12c | 2010-10-29 15:37:34 -0400 | [diff] [blame] | 208 | int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, |
| 209 | struct btrfs_root *root, |
| 210 | int wait_for_unblock); |
Chris Mason | 89ce8a6 | 2008-06-25 16:01:31 -0400 | [diff] [blame] | 211 | int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans, |
| 212 | struct btrfs_root *root); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 213 | int btrfs_should_end_transaction(struct btrfs_trans_handle *trans, |
| 214 | struct btrfs_root *root); |
Chris Mason | ab78c84 | 2008-07-29 16:15:18 -0400 | [diff] [blame] | 215 | void btrfs_throttle(struct btrfs_root *root); |
Yan Zheng | 5d4f98a | 2009-06-10 10:45:14 -0400 | [diff] [blame] | 216 | int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans, |
| 217 | struct btrfs_root *root); |
Chris Mason | 690587d | 2009-10-13 13:29:19 -0400 | [diff] [blame] | 218 | int btrfs_write_marked_extents(struct btrfs_root *root, |
Yan, Zheng | 8cef4e1 | 2009-11-12 09:33:26 +0000 | [diff] [blame] | 219 | struct extent_io_tree *dirty_pages, int mark); |
Chris Mason | 690587d | 2009-10-13 13:29:19 -0400 | [diff] [blame] | 220 | int btrfs_wait_marked_extents(struct btrfs_root *root, |
Yan, Zheng | 8cef4e1 | 2009-11-12 09:33:26 +0000 | [diff] [blame] | 221 | struct extent_io_tree *dirty_pages, int mark); |
Yan, Zheng | 8929ecfa | 2010-05-16 10:49:58 -0400 | [diff] [blame] | 222 | int btrfs_transaction_blocked(struct btrfs_fs_info *info); |
Chris Mason | f36f304 | 2009-07-30 10:04:48 -0400 | [diff] [blame] | 223 | int btrfs_transaction_in_commit(struct btrfs_fs_info *info); |
Josef Bacik | 724e231 | 2013-09-30 11:36:38 -0400 | [diff] [blame] | 224 | void btrfs_put_transaction(struct btrfs_transaction *transaction); |
David Sterba | 572d9ab | 2014-02-05 15:26:17 +0100 | [diff] [blame] | 225 | void btrfs_apply_pending_changes(struct btrfs_fs_info *fs_info); |
Josef Bacik | 2b9dbef | 2015-09-15 10:07:04 -0400 | [diff] [blame] | 226 | void btrfs_add_dropped_root(struct btrfs_trans_handle *trans, |
| 227 | struct btrfs_root *root); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 228 | #endif |