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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
Josef Bacik3204d332015-09-24 10:46:10 -040035#define BTRFS_TRANS_HAVE_FREE_BGS 0
36#define BTRFS_TRANS_DIRTY_BG_RUN 1
Josef Bacik2968b1f2015-10-01 12:55:18 -040037#define BTRFS_TRANS_CACHE_ENOSPC 2
Josef Bacik3204d332015-09-24 10:46:10 -040038
Chris Mason79154b12007-03-22 15:59:16 -040039struct btrfs_transaction {
40 u64 transid;
Chris Masonb7ec40d2009-03-12 20:12:45 -040041 /*
Miao Xie0860adf2013-05-15 07:48:27 +000042 * total external writers(USERSPACE/START/ATTACH) in this
43 * transaction, it must be zero before the transaction is
44 * being committed
45 */
46 atomic_t num_extwriters;
47 /*
Chris Masonb7ec40d2009-03-12 20:12:45 -040048 * total writers in this transaction, it must be zero before the
49 * transaction can end
50 */
Josef Bacik13c5a932011-04-11 15:45:29 -040051 atomic_t num_writers;
Josef Bacika4abeea2011-04-11 17:25:13 -040052 atomic_t use_count;
Josef Bacik161c35492015-09-24 16:17:39 -040053 atomic_t pending_ordered;
Chris Masonb7ec40d2009-03-12 20:12:45 -040054
Josef Bacik3204d332015-09-24 10:46:10 -040055 unsigned long flags;
Zhao Lei13212b52015-02-12 14:18:17 +080056
Miao Xie4a9d8bd2013-05-17 03:53:43 +000057 /* Be protected by fs_info->trans_lock when we want to change it. */
58 enum btrfs_trans_state state;
Chris Mason8fd17792007-04-19 21:01:03 -040059 struct list_head list;
Chris Masond1310b22008-01-24 16:13:08 -050060 struct extent_io_tree dirty_pages;
Chris Mason08607c12007-06-08 15:33:54 -040061 unsigned long start_time;
Chris Mason79154b12007-03-22 15:59:16 -040062 wait_queue_head_t writer_wait;
63 wait_queue_head_t commit_wait;
Josef Bacik161c35492015-09-24 16:17:39 -040064 wait_queue_head_t pending_wait;
Chris Mason3063d292008-01-08 15:46:30 -050065 struct list_head pending_snapshots;
Josef Bacik6df9a952013-06-27 13:22:46 -040066 struct list_head pending_chunks;
Josef Bacik9e351cc2014-03-13 15:42:13 -040067 struct list_head switch_commits;
Josef Bacikce93ec52014-11-17 15:45:48 -050068 struct list_head dirty_bgs;
Chris Mason1bbc6212015-04-06 12:46:08 -070069 struct list_head io_bgs;
Josef Bacik2b9dbef2015-09-15 10:07:04 -040070 struct list_head dropped_roots;
Josef Bacikcb723e42015-02-18 08:06:57 -080071 u64 num_dirty_bgs;
Chris Mason1bbc6212015-04-06 12:46:08 -070072
73 /*
74 * we need to make sure block group deletion doesn't race with
75 * free space cache writeout. This mutex keeps them from stomping
76 * on each other
77 */
78 struct mutex cache_write_mutex;
Josef Bacikce93ec52014-11-17 15:45:48 -050079 spinlock_t dirty_bgs_lock;
Jeff Mahoneye33e17e2015-06-15 09:41:19 -040080 struct list_head deleted_bgs;
81 spinlock_t deleted_bgs_lock;
Josef Bacik2b9dbef2015-09-15 10:07:04 -040082 spinlock_t dropped_roots_lock;
Chris Mason56bec292009-03-13 10:10:06 -040083 struct btrfs_delayed_ref_root delayed_refs;
Jeff Mahoney49b25e02012-03-01 17:24:58 +010084 int aborted;
Chris Mason79154b12007-03-22 15:59:16 -040085};
86
Miao Xie0860adf2013-05-15 07:48:27 +000087#define __TRANS_FREEZABLE (1U << 0)
88
89#define __TRANS_USERSPACE (1U << 8)
90#define __TRANS_START (1U << 9)
91#define __TRANS_ATTACH (1U << 10)
92#define __TRANS_JOIN (1U << 11)
93#define __TRANS_JOIN_NOLOCK (1U << 12)
Josef Bacikfaa2dbf2014-05-07 17:06:09 -040094#define __TRANS_DUMMY (1U << 13)
Miao Xie0860adf2013-05-15 07:48:27 +000095
96#define TRANS_USERSPACE (__TRANS_USERSPACE | __TRANS_FREEZABLE)
97#define TRANS_START (__TRANS_START | __TRANS_FREEZABLE)
98#define TRANS_ATTACH (__TRANS_ATTACH)
99#define TRANS_JOIN (__TRANS_JOIN | __TRANS_FREEZABLE)
100#define TRANS_JOIN_NOLOCK (__TRANS_JOIN_NOLOCK)
101
102#define TRANS_EXTWRITERS (__TRANS_USERSPACE | __TRANS_START | \
103 __TRANS_ATTACH)
Miao Xiea698d0752012-09-20 01:51:59 -0600104
David Sterba2755a0d2014-07-31 00:43:18 +0200105#define BTRFS_SEND_TRANS_STUB ((void *)1)
Josef Bacika26e8c92014-03-28 17:07:27 -0400106
Chris Masone089f052007-03-16 16:20:31 -0400107struct btrfs_trans_handle {
108 u64 transid;
Yan, Zhengf0486c62010-05-16 10:46:25 -0400109 u64 bytes_reserved;
Filipe Manana4fbcdf62015-05-20 14:01:54 +0100110 u64 chunk_bytes_reserved;
Josef Bacik2a1eb462011-04-13 15:15:59 -0400111 unsigned long use_count;
Chris Masone089f052007-03-16 16:20:31 -0400112 unsigned long blocks_reserved;
113 unsigned long blocks_used;
Chris Mason56bec292009-03-13 10:10:06 -0400114 unsigned long delayed_ref_updates;
Yan, Zhengf0486c62010-05-16 10:46:25 -0400115 struct btrfs_transaction *transaction;
116 struct btrfs_block_rsv *block_rsv;
Josef Bacik2a1eb462011-04-13 15:15:59 -0400117 struct btrfs_block_rsv *orig_rsv;
Miao Xiea698d0752012-09-20 01:51:59 -0600118 short aborted;
119 short adding_csums;
Josef Bacikc6b305a2012-12-18 09:16:16 -0500120 bool allocating_chunk;
Filipe Mananad9a05402015-10-03 13:13:13 +0100121 bool can_flush_pending_bgs;
Miao Xie20dd2cb2013-09-25 21:47:45 +0800122 bool reloc_reserved;
Josef Bacik5039edd2014-01-15 13:34:13 -0500123 bool sync;
Miao Xie0860adf2013-05-15 07:48:27 +0000124 unsigned int type;
Arne Jansend13603e2011-09-13 11:40:09 +0200125 /*
126 * this root is only needed to validate that the root passed to
127 * start_transaction is the same as the one passed to end_transaction.
128 * Subvolume quota depends on this
129 */
130 struct btrfs_root *root;
Arne Jansenbed92ea2012-06-28 18:03:02 +0200131 struct seq_list delayed_ref_elem;
132 struct list_head qgroup_ref_list;
Josef Bacikea658ba2012-09-11 16:57:25 -0400133 struct list_head new_bgs;
Chris Masone089f052007-03-16 16:20:31 -0400134};
135
Chris Mason3063d292008-01-08 15:46:30 -0500136struct btrfs_pending_snapshot {
Chris Mason3de45862008-11-17 21:02:50 -0500137 struct dentry *dentry;
Miao Xiee9662f72013-02-28 10:01:15 +0000138 struct inode *dir;
Chris Mason3063d292008-01-08 15:46:30 -0500139 struct btrfs_root *root;
Yan, Zhenga22285a2010-05-16 10:48:46 -0400140 struct btrfs_root *snap;
Arne Jansen6f72c7e2011-09-14 15:58:21 +0200141 struct btrfs_qgroup_inherit *inherit;
Yan, Zhenga22285a2010-05-16 10:48:46 -0400142 /* block reservation for the operation */
143 struct btrfs_block_rsv block_rsv;
Miao Xied5c12072013-02-28 10:04:33 +0000144 u64 qgroup_reserved;
Yan, Zhenga22285a2010-05-16 10:48:46 -0400145 /* extra metadata reseration for relocation */
146 int error;
Li Zefanb83cc962010-12-20 16:04:08 +0800147 bool readonly;
Chris Mason3063d292008-01-08 15:46:30 -0500148 struct list_head list;
149};
150
Josef Bacik15ee9bc2007-08-10 16:22:09 -0400151static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
152 struct inode *inode)
153{
Filipe Manana2f2ff0e2015-03-20 17:19:46 +0000154 spin_lock(&BTRFS_I(inode)->lock);
Josef Bacik15ee9bc2007-08-10 16:22:09 -0400155 BTRFS_I(inode)->last_trans = trans->transaction->transid;
Chris Mason257c62e2009-10-13 13:21:08 -0400156 BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid;
Liu Bo46d8bc32012-08-29 01:07:55 -0600157 BTRFS_I(inode)->last_log_commit = BTRFS_I(inode)->root->last_log_commit;
Filipe Manana2f2ff0e2015-03-20 17:19:46 +0000158 spin_unlock(&BTRFS_I(inode)->lock);
Josef Bacik15ee9bc2007-08-10 16:22:09 -0400159}
160
Qu Wenruo9086db82015-04-20 09:53:50 +0800161/*
162 * Make qgroup codes to skip given qgroupid, means the old/new_roots for
163 * qgroup won't contain the qgroupid in it.
164 */
165static inline void btrfs_set_skip_qgroup(struct btrfs_trans_handle *trans,
166 u64 qgroupid)
167{
168 struct btrfs_delayed_ref_root *delayed_refs;
169
170 delayed_refs = &trans->transaction->delayed_refs;
171 WARN_ON(delayed_refs->qgroup_to_skip);
172 delayed_refs->qgroup_to_skip = qgroupid;
173}
174
175static inline void btrfs_clear_skip_qgroup(struct btrfs_trans_handle *trans)
176{
177 struct btrfs_delayed_ref_root *delayed_refs;
178
179 delayed_refs = &trans->transaction->delayed_refs;
180 WARN_ON(!delayed_refs->qgroup_to_skip);
181 delayed_refs->qgroup_to_skip = 0;
182}
183
Chris Mason79154b12007-03-22 15:59:16 -0400184int btrfs_end_transaction(struct btrfs_trans_handle *trans,
185 struct btrfs_root *root);
186struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
Alexandru Moise5aed1dd2015-09-22 20:59:15 +0000187 unsigned int num_items);
Miao Xie08e007d2012-10-16 11:33:38 +0000188struct btrfs_trans_handle *btrfs_start_transaction_lflush(
Alexandru Moise5aed1dd2015-09-22 20:59:15 +0000189 struct btrfs_root *root,
190 unsigned int num_items);
Josef Bacik7a7eaa42011-04-13 12:54:33 -0400191struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root);
192struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root);
Miao Xie354aa0f2012-09-20 01:54:00 -0600193struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root);
Miao Xied4edf392013-02-20 09:17:06 +0000194struct btrfs_trans_handle *btrfs_attach_transaction_barrier(
195 struct btrfs_root *root);
Josef Bacik7a7eaa42011-04-13 12:54:33 -0400196struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root);
Sage Weil46204592010-10-29 15:41:32 -0400197int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid);
Chris Mason08607c12007-06-08 15:33:54 -0400198
Josef Bacikcfad3922013-07-25 15:11:47 -0400199void btrfs_add_dead_root(struct btrfs_root *root);
Eric Sandeende78b512013-01-31 18:21:12 +0000200int btrfs_defrag_root(struct btrfs_root *root);
David Sterba9d1a2a32013-03-12 15:13:28 +0000201int btrfs_clean_one_deleted_snapshot(struct btrfs_root *root);
Chris Mason5f39d392007-10-15 16:14:19 -0400202int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
203 struct btrfs_root *root);
Sage Weilbb9c12c2010-10-29 15:37:34 -0400204int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
205 struct btrfs_root *root,
206 int wait_for_unblock);
Chris Mason89ce8a62008-06-25 16:01:31 -0400207int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans,
208 struct btrfs_root *root);
Yan, Zheng8929ecfa2010-05-16 10:49:58 -0400209int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
210 struct btrfs_root *root);
Chris Masonab78c842008-07-29 16:15:18 -0400211void btrfs_throttle(struct btrfs_root *root);
Yan Zheng5d4f98a2009-06-10 10:45:14 -0400212int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
213 struct btrfs_root *root);
Chris Mason690587d2009-10-13 13:29:19 -0400214int btrfs_write_marked_extents(struct btrfs_root *root,
Yan, Zheng8cef4e12009-11-12 09:33:26 +0000215 struct extent_io_tree *dirty_pages, int mark);
Chris Mason690587d2009-10-13 13:29:19 -0400216int btrfs_wait_marked_extents(struct btrfs_root *root,
Yan, Zheng8cef4e12009-11-12 09:33:26 +0000217 struct extent_io_tree *dirty_pages, int mark);
Yan, Zheng8929ecfa2010-05-16 10:49:58 -0400218int btrfs_transaction_blocked(struct btrfs_fs_info *info);
Chris Masonf36f3042009-07-30 10:04:48 -0400219int btrfs_transaction_in_commit(struct btrfs_fs_info *info);
Josef Bacik724e2312013-09-30 11:36:38 -0400220void btrfs_put_transaction(struct btrfs_transaction *transaction);
David Sterba572d9ab2014-02-05 15:26:17 +0100221void btrfs_apply_pending_changes(struct btrfs_fs_info *fs_info);
Josef Bacik2b9dbef2015-09-15 10:07:04 -0400222void btrfs_add_dropped_root(struct btrfs_trans_handle *trans,
223 struct btrfs_root *root);
Chris Masone089f052007-03-16 16:20:31 -0400224#endif