2 * Copyright (C) 2007 Oracle. All rights reserved.
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.
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.
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.
19 #ifndef __BTRFS_TRANSACTION__
20 #define __BTRFS_TRANSACTION__
21 #include "btrfs_inode.h"
22 #include "delayed-ref.h"
24 struct btrfs_transaction {
27 * total writers in this transaction, it must be zero before the
33 unsigned long num_joined;
35 spinlock_t commit_lock;
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;
49 struct btrfs_trans_handle {
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;
61 * this root is only needed to validate that the root passed to
62 * start_transaction is the same as the one passed to end_transaction.
63 * Subvolume quota depends on this
65 struct btrfs_root *root;
68 struct btrfs_pending_snapshot {
69 struct dentry *dentry;
70 struct btrfs_root *root;
71 struct btrfs_root *snap;
72 /* block reservation for the operation */
73 struct btrfs_block_rsv block_rsv;
74 /* extra metadata reseration for relocation */
77 struct list_head list;
80 static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
83 BTRFS_I(inode)->last_trans = trans->transaction->transid;
84 BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid;
87 int btrfs_end_transaction(struct btrfs_trans_handle *trans,
88 struct btrfs_root *root);
89 int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans,
90 struct btrfs_root *root);
91 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
93 struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root);
94 struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root);
95 struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root);
96 int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid);
97 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
98 struct btrfs_root *root);
100 int btrfs_add_dead_root(struct btrfs_root *root);
101 int btrfs_defrag_root(struct btrfs_root *root, int cacheonly);
102 int btrfs_clean_old_snapshots(struct btrfs_root *root);
103 int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
104 struct btrfs_root *root);
105 int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
106 struct btrfs_root *root,
107 int wait_for_unblock);
108 int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
109 struct btrfs_root *root);
110 int btrfs_end_transaction_dmeta(struct btrfs_trans_handle *trans,
111 struct btrfs_root *root);
112 int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
113 struct btrfs_root *root);
114 void btrfs_throttle(struct btrfs_root *root);
115 int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
116 struct btrfs_root *root);
117 int btrfs_write_and_wait_marked_extents(struct btrfs_root *root,
118 struct extent_io_tree *dirty_pages, int mark);
119 int btrfs_write_marked_extents(struct btrfs_root *root,
120 struct extent_io_tree *dirty_pages, int mark);
121 int btrfs_wait_marked_extents(struct btrfs_root *root,
122 struct extent_io_tree *dirty_pages, int mark);
123 int btrfs_transaction_blocked(struct btrfs_fs_info *info);
124 int btrfs_transaction_in_commit(struct btrfs_fs_info *info);
125 void put_transaction(struct btrfs_transaction *transaction);