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 external writers(USERSPACE/START/ATTACH) in this
29 * transaction, it must be zero before the transaction is
32 atomic_t num_extwriters
;
34 * total writers in this transaction, it must be zero before the
40 unsigned long num_joined
;
42 spinlock_t commit_lock
;
46 struct list_head list
;
47 struct extent_io_tree dirty_pages
;
48 unsigned long start_time
;
49 wait_queue_head_t writer_wait
;
50 wait_queue_head_t commit_wait
;
51 struct list_head pending_snapshots
;
52 struct list_head ordered_operations
;
53 struct btrfs_delayed_ref_root delayed_refs
;
57 #define __TRANS_FREEZABLE (1U << 0)
59 #define __TRANS_USERSPACE (1U << 8)
60 #define __TRANS_START (1U << 9)
61 #define __TRANS_ATTACH (1U << 10)
62 #define __TRANS_JOIN (1U << 11)
63 #define __TRANS_JOIN_NOLOCK (1U << 12)
65 #define TRANS_USERSPACE (__TRANS_USERSPACE | __TRANS_FREEZABLE)
66 #define TRANS_START (__TRANS_START | __TRANS_FREEZABLE)
67 #define TRANS_ATTACH (__TRANS_ATTACH)
68 #define TRANS_JOIN (__TRANS_JOIN | __TRANS_FREEZABLE)
69 #define TRANS_JOIN_NOLOCK (__TRANS_JOIN_NOLOCK)
71 #define TRANS_EXTWRITERS (__TRANS_USERSPACE | __TRANS_START | \
74 struct btrfs_trans_handle
{
78 unsigned long use_count
;
79 unsigned long blocks_reserved
;
80 unsigned long blocks_used
;
81 unsigned long delayed_ref_updates
;
82 struct btrfs_transaction
*transaction
;
83 struct btrfs_block_rsv
*block_rsv
;
84 struct btrfs_block_rsv
*orig_rsv
;
87 bool allocating_chunk
;
90 * this root is only needed to validate that the root passed to
91 * start_transaction is the same as the one passed to end_transaction.
92 * Subvolume quota depends on this
94 struct btrfs_root
*root
;
95 struct seq_list delayed_ref_elem
;
96 struct list_head qgroup_ref_list
;
97 struct list_head new_bgs
;
100 struct btrfs_pending_snapshot
{
101 struct dentry
*dentry
;
103 struct btrfs_root
*root
;
104 struct btrfs_root
*snap
;
105 struct btrfs_qgroup_inherit
*inherit
;
106 /* block reservation for the operation */
107 struct btrfs_block_rsv block_rsv
;
109 /* extra metadata reseration for relocation */
112 struct list_head list
;
115 static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle
*trans
,
118 BTRFS_I(inode
)->last_trans
= trans
->transaction
->transid
;
119 BTRFS_I(inode
)->last_sub_trans
= BTRFS_I(inode
)->root
->log_transid
;
120 BTRFS_I(inode
)->last_log_commit
= BTRFS_I(inode
)->root
->last_log_commit
;
123 int btrfs_end_transaction(struct btrfs_trans_handle
*trans
,
124 struct btrfs_root
*root
);
125 struct btrfs_trans_handle
*btrfs_start_transaction(struct btrfs_root
*root
,
127 struct btrfs_trans_handle
*btrfs_start_transaction_lflush(
128 struct btrfs_root
*root
, int num_items
);
129 struct btrfs_trans_handle
*btrfs_join_transaction(struct btrfs_root
*root
);
130 struct btrfs_trans_handle
*btrfs_join_transaction_nolock(struct btrfs_root
*root
);
131 struct btrfs_trans_handle
*btrfs_attach_transaction(struct btrfs_root
*root
);
132 struct btrfs_trans_handle
*btrfs_attach_transaction_barrier(
133 struct btrfs_root
*root
);
134 struct btrfs_trans_handle
*btrfs_start_ioctl_transaction(struct btrfs_root
*root
);
135 int btrfs_wait_for_commit(struct btrfs_root
*root
, u64 transid
);
136 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle
*trans
,
137 struct btrfs_root
*root
);
139 int btrfs_add_dead_root(struct btrfs_root
*root
);
140 int btrfs_defrag_root(struct btrfs_root
*root
);
141 int btrfs_clean_one_deleted_snapshot(struct btrfs_root
*root
);
142 int btrfs_commit_transaction(struct btrfs_trans_handle
*trans
,
143 struct btrfs_root
*root
);
144 int btrfs_commit_transaction_async(struct btrfs_trans_handle
*trans
,
145 struct btrfs_root
*root
,
146 int wait_for_unblock
);
147 int btrfs_end_transaction_throttle(struct btrfs_trans_handle
*trans
,
148 struct btrfs_root
*root
);
149 int btrfs_end_transaction_dmeta(struct btrfs_trans_handle
*trans
,
150 struct btrfs_root
*root
);
151 int btrfs_should_end_transaction(struct btrfs_trans_handle
*trans
,
152 struct btrfs_root
*root
);
153 void btrfs_throttle(struct btrfs_root
*root
);
154 int btrfs_record_root_in_trans(struct btrfs_trans_handle
*trans
,
155 struct btrfs_root
*root
);
156 int btrfs_write_and_wait_marked_extents(struct btrfs_root
*root
,
157 struct extent_io_tree
*dirty_pages
, int mark
);
158 int btrfs_write_marked_extents(struct btrfs_root
*root
,
159 struct extent_io_tree
*dirty_pages
, int mark
);
160 int btrfs_wait_marked_extents(struct btrfs_root
*root
,
161 struct extent_io_tree
*dirty_pages
, int mark
);
162 int btrfs_transaction_blocked(struct btrfs_fs_info
*info
);
163 int btrfs_transaction_in_commit(struct btrfs_fs_info
*info
);