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 /*
27 * total writers in this transaction, it must be zero before the
28 * transaction can end
29 */
30 atomic_t num_writers;
31 atomic_t use_count;
32
33 unsigned long num_joined;
34
35 spinlock_t commit_lock;
36 int in_commit;
37 int commit_done;
38 int blocked;
39 struct list_head list;
40 struct extent_io_tree dirty_pages;
41 unsigned long start_time;
42 wait_queue_head_t writer_wait;
43 wait_queue_head_t commit_wait;
44 struct list_head pending_snapshots;
45 struct btrfs_delayed_ref_root delayed_refs;
46 int aborted;
47 };
48
49 struct btrfs_trans_handle {
50 u64 transid;
51 u64 bytes_reserved;
52 unsigned long use_count;
53 unsigned long blocks_reserved;
54 unsigned long blocks_used;
55 unsigned long delayed_ref_updates;
56 struct btrfs_transaction *transaction;
57 struct btrfs_block_rsv *block_rsv;
58 struct btrfs_block_rsv *orig_rsv;
59 int aborted;
60 };
61
62 struct btrfs_pending_snapshot {
63 struct dentry *dentry;
64 struct btrfs_root *root;
65 struct btrfs_root *snap;
66 /* block reservation for the operation */
67 struct btrfs_block_rsv block_rsv;
68 /* extra metadata reseration for relocation */
69 int error;
70 bool readonly;
71 struct list_head list;
72 };
73
btrfs_set_inode_last_trans(struct btrfs_trans_handle * trans,struct inode * inode)74 static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
75 struct inode *inode)
76 {
77 BTRFS_I(inode)->last_trans = trans->transaction->transid;
78 BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid;
79 }
80
81 int btrfs_end_transaction(struct btrfs_trans_handle *trans,
82 struct btrfs_root *root);
83 int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans,
84 struct btrfs_root *root);
85 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
86 int num_items);
87 struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root);
88 struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root);
89 struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root);
90 int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid);
91 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
92 struct btrfs_root *root);
93
94 int btrfs_add_dead_root(struct btrfs_root *root);
95 int btrfs_defrag_root(struct btrfs_root *root, int cacheonly);
96 int btrfs_clean_old_snapshots(struct btrfs_root *root);
97 int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
98 struct btrfs_root *root);
99 int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
100 struct btrfs_root *root,
101 int wait_for_unblock);
102 int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
103 struct btrfs_root *root);
104 int btrfs_end_transaction_dmeta(struct btrfs_trans_handle *trans,
105 struct btrfs_root *root);
106 int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
107 struct btrfs_root *root);
108 void btrfs_throttle(struct btrfs_root *root);
109 int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
110 struct btrfs_root *root);
111 int btrfs_write_and_wait_marked_extents(struct btrfs_root *root,
112 struct extent_io_tree *dirty_pages, int mark);
113 int btrfs_write_marked_extents(struct btrfs_root *root,
114 struct extent_io_tree *dirty_pages, int mark);
115 int btrfs_wait_marked_extents(struct btrfs_root *root,
116 struct extent_io_tree *dirty_pages, int mark);
117 int btrfs_transaction_blocked(struct btrfs_fs_info *info);
118 int btrfs_transaction_in_commit(struct btrfs_fs_info *info);
119 void put_transaction(struct btrfs_transaction *transaction);
120 #endif
121