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