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Chris Mason6cbd5572007-06-12 09:07:21 -04001/*
2 * Copyright (C) 2007 Oracle. All rights reserved.
3 *
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.
7 *
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.
12 *
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.
17 */
18
Chris Masondc17ff82008-01-08 15:46:30 -050019#ifndef __BTRFS_TRANSACTION__
20#define __BTRFS_TRANSACTION__
Chris Mason31f3c992007-04-30 15:25:45 -040021#include "btrfs_inode.h"
Chris Mason56bec292009-03-13 10:10:06 -040022#include "delayed-ref.h"
Arne Jansenbed92ea2012-06-28 18:03:02 +020023#include "ctree.h"
Chris Masone089f052007-03-16 16:20:31 -040024
Miao Xie4a9d8bd2013-05-17 03:53:43 +000025enum btrfs_trans_state {
26 TRANS_STATE_RUNNING = 0,
27 TRANS_STATE_BLOCKED = 1,
28 TRANS_STATE_COMMIT_START = 2,
29 TRANS_STATE_COMMIT_DOING = 3,
30 TRANS_STATE_UNBLOCKED = 4,
31 TRANS_STATE_COMPLETED = 5,
32 TRANS_STATE_MAX = 6,
33};
34
Chris Mason79154b12007-03-22 15:59:16 -040035struct btrfs_transaction {
36 u64 transid;
Chris Masonb7ec40d2009-03-12 20:12:45 -040037 /*
Miao Xie0860adf2013-05-15 07:48:27 +000038 * total external writers(USERSPACE/START/ATTACH) in this
39 * transaction, it must be zero before the transaction is
40 * being committed
41 */
42 atomic_t num_extwriters;
43 /*
Chris Masonb7ec40d2009-03-12 20:12:45 -040044 * total writers in this transaction, it must be zero before the
45 * transaction can end
46 */
Josef Bacik13c5a932011-04-11 15:45:29 -040047 atomic_t num_writers;
Josef Bacika4abeea2011-04-11 17:25:13 -040048 atomic_t use_count;
Chris Masonb7ec40d2009-03-12 20:12:45 -040049
Miao Xie4a9d8bd2013-05-17 03:53:43 +000050 /* Be protected by fs_info->trans_lock when we want to change it. */
51 enum btrfs_trans_state state;
Chris Mason8fd17792007-04-19 21:01:03 -040052 struct list_head list;
Chris Masond1310b22008-01-24 16:13:08 -050053 struct extent_io_tree dirty_pages;
Chris Mason08607c12007-06-08 15:33:54 -040054 unsigned long start_time;
Chris Mason79154b12007-03-22 15:59:16 -040055 wait_queue_head_t writer_wait;
56 wait_queue_head_t commit_wait;
Chris Mason3063d292008-01-08 15:46:30 -050057 struct list_head pending_snapshots;
Josef Bacik6df9a952013-06-27 13:22:46 -040058 struct list_head pending_chunks;
Josef Bacik9e351cc2014-03-13 15:42:13 -040059 struct list_head switch_commits;
Chris Mason56bec292009-03-13 10:10:06 -040060 struct btrfs_delayed_ref_root delayed_refs;
Jeff Mahoney49b25e02012-03-01 17:24:58 +010061 int aborted;
Chris Mason79154b12007-03-22 15:59:16 -040062};
63
Miao Xie0860adf2013-05-15 07:48:27 +000064#define __TRANS_FREEZABLE (1U << 0)
65
66#define __TRANS_USERSPACE (1U << 8)
67#define __TRANS_START (1U << 9)
68#define __TRANS_ATTACH (1U << 10)
69#define __TRANS_JOIN (1U << 11)
70#define __TRANS_JOIN_NOLOCK (1U << 12)
Josef Bacikfaa2dbf2014-05-07 17:06:09 -040071#define __TRANS_DUMMY (1U << 13)
Miao Xie0860adf2013-05-15 07:48:27 +000072
73#define TRANS_USERSPACE (__TRANS_USERSPACE | __TRANS_FREEZABLE)
74#define TRANS_START (__TRANS_START | __TRANS_FREEZABLE)
75#define TRANS_ATTACH (__TRANS_ATTACH)
76#define TRANS_JOIN (__TRANS_JOIN | __TRANS_FREEZABLE)
77#define TRANS_JOIN_NOLOCK (__TRANS_JOIN_NOLOCK)
78
79#define TRANS_EXTWRITERS (__TRANS_USERSPACE | __TRANS_START | \
80 __TRANS_ATTACH)
Miao Xiea698d0752012-09-20 01:51:59 -060081
Josef Bacika26e8c92014-03-28 17:07:27 -040082#define BTRFS_SEND_TRANS_STUB 1
83
Chris Masone089f052007-03-16 16:20:31 -040084struct btrfs_trans_handle {
85 u64 transid;
Yan, Zhengf0486c62010-05-16 10:46:25 -040086 u64 bytes_reserved;
Arne Jansenc5567232011-09-14 15:44:05 +020087 u64 qgroup_reserved;
Josef Bacik2a1eb462011-04-13 15:15:59 -040088 unsigned long use_count;
Chris Masone089f052007-03-16 16:20:31 -040089 unsigned long blocks_reserved;
90 unsigned long blocks_used;
Chris Mason56bec292009-03-13 10:10:06 -040091 unsigned long delayed_ref_updates;
Yan, Zhengf0486c62010-05-16 10:46:25 -040092 struct btrfs_transaction *transaction;
93 struct btrfs_block_rsv *block_rsv;
Josef Bacik2a1eb462011-04-13 15:15:59 -040094 struct btrfs_block_rsv *orig_rsv;
Miao Xiea698d0752012-09-20 01:51:59 -060095 short aborted;
96 short adding_csums;
Josef Bacikc6b305a2012-12-18 09:16:16 -050097 bool allocating_chunk;
Miao Xie20dd2cb2013-09-25 21:47:45 +080098 bool reloc_reserved;
Josef Bacik5039edd2014-01-15 13:34:13 -050099 bool sync;
Miao Xie0860adf2013-05-15 07:48:27 +0000100 unsigned int type;
Arne Jansend13603e2011-09-13 11:40:09 +0200101 /*
102 * this root is only needed to validate that the root passed to
103 * start_transaction is the same as the one passed to end_transaction.
104 * Subvolume quota depends on this
105 */
106 struct btrfs_root *root;
Arne Jansenbed92ea2012-06-28 18:03:02 +0200107 struct seq_list delayed_ref_elem;
108 struct list_head qgroup_ref_list;
Josef Bacikea658ba2012-09-11 16:57:25 -0400109 struct list_head new_bgs;
Chris Masone089f052007-03-16 16:20:31 -0400110};
111
Chris Mason3063d292008-01-08 15:46:30 -0500112struct btrfs_pending_snapshot {
Chris Mason3de45862008-11-17 21:02:50 -0500113 struct dentry *dentry;
Miao Xiee9662f72013-02-28 10:01:15 +0000114 struct inode *dir;
Chris Mason3063d292008-01-08 15:46:30 -0500115 struct btrfs_root *root;
Yan, Zhenga22285a2010-05-16 10:48:46 -0400116 struct btrfs_root *snap;
Arne Jansen6f72c7e2011-09-14 15:58:21 +0200117 struct btrfs_qgroup_inherit *inherit;
Yan, Zhenga22285a2010-05-16 10:48:46 -0400118 /* block reservation for the operation */
119 struct btrfs_block_rsv block_rsv;
Miao Xied5c12072013-02-28 10:04:33 +0000120 u64 qgroup_reserved;
Yan, Zhenga22285a2010-05-16 10:48:46 -0400121 /* extra metadata reseration for relocation */
122 int error;
Li Zefanb83cc962010-12-20 16:04:08 +0800123 bool readonly;
Chris Mason3063d292008-01-08 15:46:30 -0500124 struct list_head list;
125};
126
Josef Bacik15ee9bc2007-08-10 16:22:09 -0400127static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
128 struct inode *inode)
129{
130 BTRFS_I(inode)->last_trans = trans->transaction->transid;
Chris Mason257c62e2009-10-13 13:21:08 -0400131 BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid;
Liu Bo46d8bc32012-08-29 01:07:55 -0600132 BTRFS_I(inode)->last_log_commit = BTRFS_I(inode)->root->last_log_commit;
Josef Bacik15ee9bc2007-08-10 16:22:09 -0400133}
134
Chris Mason79154b12007-03-22 15:59:16 -0400135int btrfs_end_transaction(struct btrfs_trans_handle *trans,
136 struct btrfs_root *root);
137struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
Yan, Zhenga22285a2010-05-16 10:48:46 -0400138 int num_items);
Miao Xie08e007d2012-10-16 11:33:38 +0000139struct btrfs_trans_handle *btrfs_start_transaction_lflush(
Miao Xie8407aa42012-09-07 01:43:32 -0600140 struct btrfs_root *root, int num_items);
Josef Bacik7a7eaa42011-04-13 12:54:33 -0400141struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root);
142struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root);
Miao Xie354aa0f2012-09-20 01:54:00 -0600143struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root);
Miao Xied4edf392013-02-20 09:17:06 +0000144struct btrfs_trans_handle *btrfs_attach_transaction_barrier(
145 struct btrfs_root *root);
Josef Bacik7a7eaa42011-04-13 12:54:33 -0400146struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root);
Sage Weil46204592010-10-29 15:41:32 -0400147int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid);
Chris Mason79154b12007-03-22 15:59:16 -0400148int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
149 struct btrfs_root *root);
Chris Mason08607c12007-06-08 15:33:54 -0400150
Josef Bacikcfad3922013-07-25 15:11:47 -0400151void btrfs_add_dead_root(struct btrfs_root *root);
Eric Sandeende78b512013-01-31 18:21:12 +0000152int btrfs_defrag_root(struct btrfs_root *root);
David Sterba9d1a2a32013-03-12 15:13:28 +0000153int btrfs_clean_one_deleted_snapshot(struct btrfs_root *root);
Chris Mason5f39d392007-10-15 16:14:19 -0400154int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
155 struct btrfs_root *root);
Sage Weilbb9c12c2010-10-29 15:37:34 -0400156int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
157 struct btrfs_root *root,
158 int wait_for_unblock);
Chris Mason89ce8a62008-06-25 16:01:31 -0400159int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
160 struct btrfs_root *root);
Yan, Zheng8929ecfa2010-05-16 10:49:58 -0400161int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
162 struct btrfs_root *root);
Chris Masonab78c842008-07-29 16:15:18 -0400163void btrfs_throttle(struct btrfs_root *root);
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400164int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
165 struct btrfs_root *root);
Chris Mason690587d2009-10-13 13:29:19 -0400166int btrfs_write_marked_extents(struct btrfs_root *root,
Yan, Zheng8cef4e12009-11-12 09:33:26 +0000167 struct extent_io_tree *dirty_pages, int mark);
Chris Mason690587d2009-10-13 13:29:19 -0400168int btrfs_wait_marked_extents(struct btrfs_root *root,
Yan, Zheng8cef4e12009-11-12 09:33:26 +0000169 struct extent_io_tree *dirty_pages, int mark);
Yan, Zheng8929ecfa2010-05-16 10:49:58 -0400170int btrfs_transaction_blocked(struct btrfs_fs_info *info);
Chris Masonf36f3042009-07-30 10:04:48 -0400171int btrfs_transaction_in_commit(struct btrfs_fs_info *info);
Josef Bacik724e2312013-09-30 11:36:38 -0400172void btrfs_put_transaction(struct btrfs_transaction *transaction);
Chris Masone089f052007-03-16 16:20:31 -0400173#endif