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
;
93 /* extra metadata reseration for relocation */
96 struct list_head list
;
99 static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle
*trans
,
102 BTRFS_I(inode
)->last_trans
= trans
->transaction
->transid
;
103 BTRFS_I(inode
)->last_sub_trans
= BTRFS_I(inode
)->root
->log_transid
;
104 BTRFS_I(inode
)->last_log_commit
= BTRFS_I(inode
)->root
->last_log_commit
;
107 int btrfs_end_transaction(struct btrfs_trans_handle
*trans
,
108 struct btrfs_root
*root
);
109 struct btrfs_trans_handle
*btrfs_start_transaction(struct btrfs_root
*root
,
111 struct btrfs_trans_handle
*btrfs_start_transaction_lflush(
112 struct btrfs_root
*root
, int num_items
);
113 struct btrfs_trans_handle
*btrfs_join_transaction(struct btrfs_root
*root
);
114 struct btrfs_trans_handle
*btrfs_join_transaction_nolock(struct btrfs_root
*root
);
115 struct btrfs_trans_handle
*btrfs_attach_transaction(struct btrfs_root
*root
);
116 struct btrfs_trans_handle
*btrfs_attach_transaction_barrier(
117 struct btrfs_root
*root
);
118 struct btrfs_trans_handle
*btrfs_start_ioctl_transaction(struct btrfs_root
*root
);
119 int btrfs_wait_for_commit(struct btrfs_root
*root
, u64 transid
);
120 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle
*trans
,
121 struct btrfs_root
*root
);
123 int btrfs_add_dead_root(struct btrfs_root
*root
);
124 int btrfs_defrag_root(struct btrfs_root
*root
);
125 int btrfs_clean_old_snapshots(struct btrfs_root
*root
);
126 int btrfs_commit_transaction(struct btrfs_trans_handle
*trans
,
127 struct btrfs_root
*root
);
128 int btrfs_commit_transaction_async(struct btrfs_trans_handle
*trans
,
129 struct btrfs_root
*root
,
130 int wait_for_unblock
);
131 int btrfs_end_transaction_throttle(struct btrfs_trans_handle
*trans
,
132 struct btrfs_root
*root
);
133 int btrfs_end_transaction_dmeta(struct btrfs_trans_handle
*trans
,
134 struct btrfs_root
*root
);
135 int btrfs_should_end_transaction(struct btrfs_trans_handle
*trans
,
136 struct btrfs_root
*root
);
137 void btrfs_throttle(struct btrfs_root
*root
);
138 int btrfs_record_root_in_trans(struct btrfs_trans_handle
*trans
,
139 struct btrfs_root
*root
);
140 int btrfs_write_and_wait_marked_extents(struct btrfs_root
*root
,
141 struct extent_io_tree
*dirty_pages
, int mark
);
142 int btrfs_write_marked_extents(struct btrfs_root
*root
,
143 struct extent_io_tree
*dirty_pages
, int mark
);
144 int btrfs_wait_marked_extents(struct btrfs_root
*root
,
145 struct extent_io_tree
*dirty_pages
, int mark
);
146 int btrfs_transaction_blocked(struct btrfs_fs_info
*info
);
147 int btrfs_transaction_in_commit(struct btrfs_fs_info
*info
);
148 void put_transaction(struct btrfs_transaction
*transaction
);