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"
25 struct btrfs_transaction {
28 * total writers in this transaction, it must be zero before the
34 unsigned long num_joined;
36 spinlock_t commit_lock;
40 struct list_head list;
41 struct extent_io_tree dirty_pages;
42 unsigned long start_time;
43 wait_queue_head_t writer_wait;
44 wait_queue_head_t commit_wait;
45 struct list_head pending_snapshots;
46 struct btrfs_delayed_ref_root delayed_refs;
50 struct btrfs_trans_handle {
54 unsigned long use_count;
55 unsigned long blocks_reserved;
56 unsigned long blocks_used;
57 unsigned long delayed_ref_updates;
58 struct btrfs_transaction *transaction;
59 struct btrfs_block_rsv *block_rsv;
60 struct btrfs_block_rsv *orig_rsv;
64 * this root is only needed to validate that the root passed to
65 * start_transaction is the same as the one passed to end_transaction.
66 * Subvolume quota depends on this
68 struct btrfs_root *root;
69 struct seq_list delayed_ref_elem;
70 struct list_head qgroup_ref_list;
71 struct list_head new_bgs;
74 struct btrfs_pending_snapshot {
75 struct dentry *dentry;
76 struct btrfs_root *root;
77 struct btrfs_root *snap;
78 struct btrfs_qgroup_inherit *inherit;
79 /* block reservation for the operation */
80 struct btrfs_block_rsv block_rsv;
81 /* extra metadata reseration for relocation */
84 struct list_head list;
87 static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
90 BTRFS_I(inode)->last_trans = trans->transaction->transid;
91 BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid;
92 BTRFS_I(inode)->last_log_commit = BTRFS_I(inode)->root->last_log_commit;
95 int btrfs_end_transaction(struct btrfs_trans_handle *trans,
96 struct btrfs_root *root);
97 int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans,
98 struct btrfs_root *root);
99 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
101 struct btrfs_trans_handle *btrfs_start_transaction_noflush(
102 struct btrfs_root *root, int num_items);
103 struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root);
104 struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root);
105 struct btrfs_trans_handle *btrfs_join_transaction_freeze(struct btrfs_root *root);
106 struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root);
107 int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid);
108 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
109 struct btrfs_root *root);
111 int btrfs_add_dead_root(struct btrfs_root *root);
112 int btrfs_defrag_root(struct btrfs_root *root, int cacheonly);
113 int btrfs_clean_old_snapshots(struct btrfs_root *root);
114 int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
115 struct btrfs_root *root);
116 int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
117 struct btrfs_root *root,
118 int wait_for_unblock);
119 int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
120 struct btrfs_root *root);
121 int btrfs_end_transaction_dmeta(struct btrfs_trans_handle *trans,
122 struct btrfs_root *root);
123 int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
124 struct btrfs_root *root);
125 void btrfs_throttle(struct btrfs_root *root);
126 int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
127 struct btrfs_root *root);
128 int btrfs_write_and_wait_marked_extents(struct btrfs_root *root,
129 struct extent_io_tree *dirty_pages, int mark);
130 int btrfs_write_marked_extents(struct btrfs_root *root,
131 struct extent_io_tree *dirty_pages, int mark);
132 int btrfs_wait_marked_extents(struct btrfs_root *root,
133 struct extent_io_tree *dirty_pages, int mark);
134 int btrfs_transaction_blocked(struct btrfs_fs_info *info);
135 int btrfs_transaction_in_commit(struct btrfs_fs_info *info);
136 void put_transaction(struct btrfs_transaction *transaction);