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Chris Mason6cbd5572007-06-12 09:07:21 -04001/*
2 * Copyright (C) 2007 Oracle. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
17 */
18
Chris Masondc17ff82008-01-08 15:46:30 -050019#ifndef __BTRFS_TRANSACTION__
20#define __BTRFS_TRANSACTION__
Chris Mason31f3c992007-04-30 15:25:45 -040021#include "btrfs_inode.h"
Chris Mason56bec292009-03-13 10:10:06 -040022#include "delayed-ref.h"
Chris Masone089f052007-03-16 16:20:31 -040023
Chris Mason79154b12007-03-22 15:59:16 -040024struct btrfs_transaction {
25 u64 transid;
Chris Masonb7ec40d2009-03-12 20:12:45 -040026 /*
27 * total writers in this transaction, it must be zero before the
28 * transaction can end
29 */
Josef Bacik13c5a932011-04-11 15:45:29 -040030 atomic_t num_writers;
Chris Masonb7ec40d2009-03-12 20:12:45 -040031
Josef Bacik15ee9bc2007-08-10 16:22:09 -040032 unsigned long num_joined;
Chris Mason79154b12007-03-22 15:59:16 -040033 int in_commit;
Josef Bacik13c5a932011-04-11 15:45:29 -040034 atomic_t use_count;
Chris Mason79154b12007-03-22 15:59:16 -040035 int commit_done;
Chris Masonf9295742008-07-17 12:54:14 -040036 int blocked;
Chris Mason8fd17792007-04-19 21:01:03 -040037 struct list_head list;
Chris Masond1310b22008-01-24 16:13:08 -050038 struct extent_io_tree dirty_pages;
Chris Mason08607c12007-06-08 15:33:54 -040039 unsigned long start_time;
Chris Mason79154b12007-03-22 15:59:16 -040040 wait_queue_head_t writer_wait;
41 wait_queue_head_t commit_wait;
Chris Mason3063d292008-01-08 15:46:30 -050042 struct list_head pending_snapshots;
Chris Mason56bec292009-03-13 10:10:06 -040043 struct btrfs_delayed_ref_root delayed_refs;
Chris Mason79154b12007-03-22 15:59:16 -040044};
45
Chris Masone089f052007-03-16 16:20:31 -040046struct btrfs_trans_handle {
47 u64 transid;
Yan, Zhengf0486c62010-05-16 10:46:25 -040048 u64 block_group;
49 u64 bytes_reserved;
Chris Masone089f052007-03-16 16:20:31 -040050 unsigned long blocks_reserved;
51 unsigned long blocks_used;
Chris Mason56bec292009-03-13 10:10:06 -040052 unsigned long delayed_ref_updates;
Yan, Zhengf0486c62010-05-16 10:46:25 -040053 struct btrfs_transaction *transaction;
54 struct btrfs_block_rsv *block_rsv;
Chris Masone089f052007-03-16 16:20:31 -040055};
56
Chris Mason3063d292008-01-08 15:46:30 -050057struct btrfs_pending_snapshot {
Chris Mason3de45862008-11-17 21:02:50 -050058 struct dentry *dentry;
Chris Mason3063d292008-01-08 15:46:30 -050059 struct btrfs_root *root;
Yan, Zhenga22285a2010-05-16 10:48:46 -040060 struct btrfs_root *snap;
61 /* block reservation for the operation */
62 struct btrfs_block_rsv block_rsv;
63 /* extra metadata reseration for relocation */
64 int error;
Li Zefanb83cc962010-12-20 16:04:08 +080065 bool readonly;
Chris Mason3063d292008-01-08 15:46:30 -050066 struct list_head list;
67};
68
Chris Mason31f3c992007-04-30 15:25:45 -040069static inline void btrfs_set_trans_block_group(struct btrfs_trans_handle *trans,
70 struct inode *inode)
71{
72 trans->block_group = BTRFS_I(inode)->block_group;
73}
74
Chris Masond3977122009-01-05 21:25:51 -050075static inline void btrfs_update_inode_block_group(
76 struct btrfs_trans_handle *trans,
77 struct inode *inode)
Chris Mason31f3c992007-04-30 15:25:45 -040078{
79 BTRFS_I(inode)->block_group = trans->block_group;
80}
81
Josef Bacik15ee9bc2007-08-10 16:22:09 -040082static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
83 struct inode *inode)
84{
85 BTRFS_I(inode)->last_trans = trans->transaction->transid;
Chris Mason257c62e2009-10-13 13:21:08 -040086 BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid;
Josef Bacik15ee9bc2007-08-10 16:22:09 -040087}
88
Chris Mason79154b12007-03-22 15:59:16 -040089int btrfs_end_transaction(struct btrfs_trans_handle *trans,
90 struct btrfs_root *root);
Josef Bacik0af3d002010-06-21 14:48:16 -040091int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans,
92 struct btrfs_root *root);
Chris Mason79154b12007-03-22 15:59:16 -040093struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
Yan, Zhenga22285a2010-05-16 10:48:46 -040094 int num_items);
Chris Masonf9295742008-07-17 12:54:14 -040095struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root,
Yan, Zhenga22285a2010-05-16 10:48:46 -040096 int num_blocks);
Josef Bacik0af3d002010-06-21 14:48:16 -040097struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root,
98 int num_blocks);
Sage Weil9ca9ee02008-08-04 10:41:27 -040099struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *r,
Yan, Zhenga22285a2010-05-16 10:48:46 -0400100 int num_blocks);
Sage Weil46204592010-10-29 15:41:32 -0400101int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid);
Chris Mason79154b12007-03-22 15:59:16 -0400102int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
103 struct btrfs_root *root);
104int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans,
105 struct btrfs_root *root);
Chris Mason08607c12007-06-08 15:33:54 -0400106
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400107int btrfs_add_dead_root(struct btrfs_root *root);
108int btrfs_drop_dead_root(struct btrfs_root *root);
Chris Masone9d0b132007-08-10 14:06:19 -0400109int btrfs_defrag_root(struct btrfs_root *root, int cacheonly);
110int btrfs_clean_old_snapshots(struct btrfs_root *root);
Chris Mason5f39d392007-10-15 16:14:19 -0400111int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
112 struct btrfs_root *root);
Sage Weilbb9c12c2010-10-29 15:37:34 -0400113int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
114 struct btrfs_root *root,
115 int wait_for_unblock);
Chris Mason89ce8a62008-06-25 16:01:31 -0400116int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
117 struct btrfs_root *root);
Yan, Zheng8929ecfa2010-05-16 10:49:58 -0400118int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
119 struct btrfs_root *root);
Chris Masonab78c842008-07-29 16:15:18 -0400120void btrfs_throttle(struct btrfs_root *root);
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400121int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
122 struct btrfs_root *root);
Chris Masond0c803c2008-09-11 16:17:57 -0400123int btrfs_write_and_wait_marked_extents(struct btrfs_root *root,
Yan, Zheng8cef4e12009-11-12 09:33:26 +0000124 struct extent_io_tree *dirty_pages, int mark);
Chris Mason690587d2009-10-13 13:29:19 -0400125int btrfs_write_marked_extents(struct btrfs_root *root,
Yan, Zheng8cef4e12009-11-12 09:33:26 +0000126 struct extent_io_tree *dirty_pages, int mark);
Chris Mason690587d2009-10-13 13:29:19 -0400127int btrfs_wait_marked_extents(struct btrfs_root *root,
Yan, Zheng8cef4e12009-11-12 09:33:26 +0000128 struct extent_io_tree *dirty_pages, int mark);
Yan, Zheng8929ecfa2010-05-16 10:49:58 -0400129int btrfs_transaction_blocked(struct btrfs_fs_info *info);
Chris Masonf36f3042009-07-30 10:04:48 -0400130int btrfs_transaction_in_commit(struct btrfs_fs_info *info);
Chris Masone089f052007-03-16 16:20:31 -0400131#endif