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 list_head ordered_operations;
47 struct btrfs_delayed_ref_root delayed_refs;
51 enum btrfs_trans_type {
59 struct btrfs_trans_handle {
63 unsigned long use_count;
64 unsigned long blocks_reserved;
65 unsigned long blocks_used;
66 unsigned long delayed_ref_updates;
67 struct btrfs_transaction *transaction;
68 struct btrfs_block_rsv *block_rsv;
69 struct btrfs_block_rsv *orig_rsv;
72 bool allocating_chunk;
73 enum btrfs_trans_type type;
75 * this root is only needed to validate that the root passed to
76 * start_transaction is the same as the one passed to end_transaction.
77 * Subvolume quota depends on this
79 struct btrfs_root *root;
80 struct seq_list delayed_ref_elem;
81 struct list_head qgroup_ref_list;
82 struct list_head new_bgs;
85 struct btrfs_pending_snapshot {
86 struct dentry *dentry;
88 struct btrfs_root *root;
89 struct btrfs_root *snap;
90 struct btrfs_qgroup_inherit *inherit;
91 /* block reservation for the operation */
92 struct btrfs_block_rsv block_rsv;
94 /* extra metadata reseration for relocation */
97 struct list_head list;
100 static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
103 BTRFS_I(inode)->last_trans = trans->transaction->transid;
104 BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid;
105 BTRFS_I(inode)->last_log_commit = BTRFS_I(inode)->root->last_log_commit;
108 int btrfs_end_transaction(struct btrfs_trans_handle *trans,
109 struct btrfs_root *root);
110 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
112 struct btrfs_trans_handle *btrfs_start_transaction_lflush(
113 struct btrfs_root *root, int num_items);
114 struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root);
115 struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root);
116 struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root);
117 struct btrfs_trans_handle *btrfs_attach_transaction_barrier(
118 struct btrfs_root *root);
119 struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root);
120 int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid);
121 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
122 struct btrfs_root *root);
124 int btrfs_add_dead_root(struct btrfs_root *root);
125 int btrfs_defrag_root(struct btrfs_root *root);
126 int btrfs_clean_one_deleted_snapshot(struct btrfs_root *root);
127 int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
128 struct btrfs_root *root);
129 int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
130 struct btrfs_root *root,
131 int wait_for_unblock);
132 int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
133 struct btrfs_root *root);
134 int btrfs_end_transaction_dmeta(struct btrfs_trans_handle *trans,
135 struct btrfs_root *root);
136 int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
137 struct btrfs_root *root);
138 void btrfs_throttle(struct btrfs_root *root);
139 int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
140 struct btrfs_root *root);
141 int btrfs_write_and_wait_marked_extents(struct btrfs_root *root,
142 struct extent_io_tree *dirty_pages, int mark);
143 int btrfs_write_marked_extents(struct btrfs_root *root,
144 struct extent_io_tree *dirty_pages, int mark);
145 int btrfs_wait_marked_extents(struct btrfs_root *root,
146 struct extent_io_tree *dirty_pages, int mark);
147 int btrfs_transaction_blocked(struct btrfs_fs_info *info);
148 int btrfs_transaction_in_commit(struct btrfs_fs_info *info);