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
19 #ifndef __BTRFS_TRANSACTION__
20 #define __BTRFS_TRANSACTION__
21 #include "btrfs_inode.h"
22
23 struct btrfs_transaction {
24 u64 transid;
25 unsigned long num_writers;
26 unsigned long num_joined;
27 int in_commit;
28 int use_count;
29 int commit_done;
30 int blocked;
31 struct list_head list;
32 struct extent_io_tree dirty_pages;
33 unsigned long start_time;
34 wait_queue_head_t writer_wait;
35 wait_queue_head_t commit_wait;
36 struct list_head pending_snapshots;
37 };
38
39 struct btrfs_trans_handle {
40 u64 transid;
41 unsigned long blocks_reserved;
42 unsigned long blocks_used;
43 struct btrfs_transaction *transaction;
44 u64 block_group;
45 u64 alloc_exclude_start;
46 u64 alloc_exclude_nr;
47 };
48
49 struct btrfs_pending_snapshot {
50 struct dentry *dentry;
51 struct btrfs_root *root;
52 char *name;
53 struct btrfs_key root_key;
54 struct list_head list;
55 };
56
57 struct btrfs_dirty_root {
58 struct list_head list;
59 struct btrfs_root *root;
60 struct btrfs_root *latest_root;
61 };
62
btrfs_set_trans_block_group(struct btrfs_trans_handle * trans,struct inode * inode)63 static inline void btrfs_set_trans_block_group(struct btrfs_trans_handle *trans,
64 struct inode *inode)
65 {
66 trans->block_group = BTRFS_I(inode)->block_group;
67 }
68
btrfs_update_inode_block_group(struct btrfs_trans_handle * trans,struct inode * inode)69 static inline void btrfs_update_inode_block_group(
70 struct btrfs_trans_handle *trans,
71 struct inode *inode)
72 {
73 BTRFS_I(inode)->block_group = trans->block_group;
74 }
75
btrfs_set_inode_last_trans(struct btrfs_trans_handle * trans,struct inode * inode)76 static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
77 struct inode *inode)
78 {
79 BTRFS_I(inode)->last_trans = trans->transaction->transid;
80 }
81
82 int btrfs_end_transaction(struct btrfs_trans_handle *trans,
83 struct btrfs_root *root);
84 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
85 int num_blocks);
86 struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root,
87 int num_blocks);
88 struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *r,
89 int num_blocks);
90 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
91 struct btrfs_root *root);
92 int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans,
93 struct btrfs_root *root);
94
95 int btrfs_add_dead_root(struct btrfs_root *root, struct btrfs_root *latest);
96 int btrfs_defrag_root(struct btrfs_root *root, int cacheonly);
97 int btrfs_clean_old_snapshots(struct btrfs_root *root);
98 int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
99 struct btrfs_root *root);
100 int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
101 struct btrfs_root *root);
102 void btrfs_throttle(struct btrfs_root *root);
103 int btrfs_record_root_in_trans(struct btrfs_root *root);
104 int btrfs_write_and_wait_marked_extents(struct btrfs_root *root,
105 struct extent_io_tree *dirty_pages);
106 #endif
107