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6cbd5570 CM |
1 | /* |
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 | ||
dc17ff8f CM |
19 | #ifndef __BTRFS_TRANSACTION__ |
20 | #define __BTRFS_TRANSACTION__ | |
9b64f57d ER |
21 | |
22 | #include <linux/refcount.h> | |
31f3c99b | 23 | #include "btrfs_inode.h" |
56bec294 | 24 | #include "delayed-ref.h" |
bed92eae | 25 | #include "ctree.h" |
e089f05c | 26 | |
4a9d8bde MX |
27 | enum btrfs_trans_state { |
28 | TRANS_STATE_RUNNING = 0, | |
29 | TRANS_STATE_BLOCKED = 1, | |
30 | TRANS_STATE_COMMIT_START = 2, | |
31 | TRANS_STATE_COMMIT_DOING = 3, | |
32 | TRANS_STATE_UNBLOCKED = 4, | |
33 | TRANS_STATE_COMPLETED = 5, | |
34 | TRANS_STATE_MAX = 6, | |
35 | }; | |
36 | ||
3204d33c JB |
37 | #define BTRFS_TRANS_HAVE_FREE_BGS 0 |
38 | #define BTRFS_TRANS_DIRTY_BG_RUN 1 | |
2968b1f4 | 39 | #define BTRFS_TRANS_CACHE_ENOSPC 2 |
3204d33c | 40 | |
79154b1b CM |
41 | struct btrfs_transaction { |
42 | u64 transid; | |
0860adfd MX |
43 | /* |
44 | * total external writers(USERSPACE/START/ATTACH) in this | |
45 | * transaction, it must be zero before the transaction is | |
46 | * being committed | |
47 | */ | |
48 | atomic_t num_extwriters; | |
b7ec40d7 CM |
49 | /* |
50 | * total writers in this transaction, it must be zero before the | |
51 | * transaction can end | |
52 | */ | |
13c5a93e | 53 | atomic_t num_writers; |
9b64f57d | 54 | refcount_t use_count; |
161c3549 | 55 | atomic_t pending_ordered; |
b7ec40d7 | 56 | |
3204d33c | 57 | unsigned long flags; |
13212b54 | 58 | |
4a9d8bde MX |
59 | /* Be protected by fs_info->trans_lock when we want to change it. */ |
60 | enum btrfs_trans_state state; | |
5302e089 | 61 | int aborted; |
8fd17795 | 62 | struct list_head list; |
d1310b2e | 63 | struct extent_io_tree dirty_pages; |
08607c1b | 64 | unsigned long start_time; |
79154b1b CM |
65 | wait_queue_head_t writer_wait; |
66 | wait_queue_head_t commit_wait; | |
161c3549 | 67 | wait_queue_head_t pending_wait; |
3063d29f | 68 | struct list_head pending_snapshots; |
6df9a95e | 69 | struct list_head pending_chunks; |
9e351cc8 | 70 | struct list_head switch_commits; |
ce93ec54 | 71 | struct list_head dirty_bgs; |
1bbc621e | 72 | struct list_head io_bgs; |
2b9dbef2 | 73 | struct list_head dropped_roots; |
1bbc621e CM |
74 | |
75 | /* | |
76 | * we need to make sure block group deletion doesn't race with | |
77 | * free space cache writeout. This mutex keeps them from stomping | |
78 | * on each other | |
79 | */ | |
80 | struct mutex cache_write_mutex; | |
ce93ec54 | 81 | spinlock_t dirty_bgs_lock; |
5302e089 | 82 | unsigned int num_dirty_bgs; |
348a0013 | 83 | /* Protected by spin lock fs_info->unused_bgs_lock. */ |
e33e17ee | 84 | struct list_head deleted_bgs; |
2b9dbef2 | 85 | spinlock_t dropped_roots_lock; |
56bec294 | 86 | struct btrfs_delayed_ref_root delayed_refs; |
ab8d0fc4 | 87 | struct btrfs_fs_info *fs_info; |
79154b1b CM |
88 | }; |
89 | ||
0860adfd MX |
90 | #define __TRANS_FREEZABLE (1U << 0) |
91 | ||
92 | #define __TRANS_USERSPACE (1U << 8) | |
93 | #define __TRANS_START (1U << 9) | |
94 | #define __TRANS_ATTACH (1U << 10) | |
95 | #define __TRANS_JOIN (1U << 11) | |
96 | #define __TRANS_JOIN_NOLOCK (1U << 12) | |
faa2dbf0 | 97 | #define __TRANS_DUMMY (1U << 13) |
0860adfd MX |
98 | |
99 | #define TRANS_USERSPACE (__TRANS_USERSPACE | __TRANS_FREEZABLE) | |
100 | #define TRANS_START (__TRANS_START | __TRANS_FREEZABLE) | |
101 | #define TRANS_ATTACH (__TRANS_ATTACH) | |
102 | #define TRANS_JOIN (__TRANS_JOIN | __TRANS_FREEZABLE) | |
103 | #define TRANS_JOIN_NOLOCK (__TRANS_JOIN_NOLOCK) | |
104 | ||
105 | #define TRANS_EXTWRITERS (__TRANS_USERSPACE | __TRANS_START | \ | |
106 | __TRANS_ATTACH) | |
a698d075 | 107 | |
2755a0de | 108 | #define BTRFS_SEND_TRANS_STUB ((void *)1) |
a26e8c9f | 109 | |
e089f05c CM |
110 | struct btrfs_trans_handle { |
111 | u64 transid; | |
f0486c68 | 112 | u64 bytes_reserved; |
4fbcdf66 | 113 | u64 chunk_bytes_reserved; |
56bec294 | 114 | unsigned long delayed_ref_updates; |
f0486c68 YZ |
115 | struct btrfs_transaction *transaction; |
116 | struct btrfs_block_rsv *block_rsv; | |
2a1eb461 | 117 | struct btrfs_block_rsv *orig_rsv; |
1ca4bb63 DS |
118 | refcount_t use_count; |
119 | unsigned int type; | |
a698d075 | 120 | short aborted; |
7c2871a2 | 121 | bool adding_csums; |
c6b305a8 | 122 | bool allocating_chunk; |
d9a0540a | 123 | bool can_flush_pending_bgs; |
20dd2cbf | 124 | bool reloc_reserved; |
5039eddc | 125 | bool sync; |
64c12921 | 126 | bool dirty; |
d13603ef | 127 | struct btrfs_root *root; |
64b63580 | 128 | struct btrfs_fs_info *fs_info; |
ea658bad | 129 | struct list_head new_bgs; |
e089f05c CM |
130 | }; |
131 | ||
3063d29f | 132 | struct btrfs_pending_snapshot { |
3de4586c | 133 | struct dentry *dentry; |
e9662f70 | 134 | struct inode *dir; |
3063d29f | 135 | struct btrfs_root *root; |
b0c0ea63 | 136 | struct btrfs_root_item *root_item; |
a22285a6 | 137 | struct btrfs_root *snap; |
6f72c7e2 | 138 | struct btrfs_qgroup_inherit *inherit; |
8546b570 | 139 | struct btrfs_path *path; |
a22285a6 YZ |
140 | /* block reservation for the operation */ |
141 | struct btrfs_block_rsv block_rsv; | |
d5c12070 | 142 | u64 qgroup_reserved; |
01327610 | 143 | /* extra metadata reservation for relocation */ |
a22285a6 | 144 | int error; |
b83cc969 | 145 | bool readonly; |
3063d29f CM |
146 | struct list_head list; |
147 | }; | |
148 | ||
15ee9bc7 JB |
149 | static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans, |
150 | struct inode *inode) | |
151 | { | |
2f2ff0ee | 152 | spin_lock(&BTRFS_I(inode)->lock); |
15ee9bc7 | 153 | BTRFS_I(inode)->last_trans = trans->transaction->transid; |
257c62e1 | 154 | BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid; |
46d8bc34 | 155 | BTRFS_I(inode)->last_log_commit = BTRFS_I(inode)->root->last_log_commit; |
2f2ff0ee | 156 | spin_unlock(&BTRFS_I(inode)->lock); |
15ee9bc7 JB |
157 | } |
158 | ||
9086db86 QW |
159 | /* |
160 | * Make qgroup codes to skip given qgroupid, means the old/new_roots for | |
161 | * qgroup won't contain the qgroupid in it. | |
162 | */ | |
163 | static inline void btrfs_set_skip_qgroup(struct btrfs_trans_handle *trans, | |
164 | u64 qgroupid) | |
165 | { | |
166 | struct btrfs_delayed_ref_root *delayed_refs; | |
167 | ||
168 | delayed_refs = &trans->transaction->delayed_refs; | |
169 | WARN_ON(delayed_refs->qgroup_to_skip); | |
170 | delayed_refs->qgroup_to_skip = qgroupid; | |
171 | } | |
172 | ||
173 | static inline void btrfs_clear_skip_qgroup(struct btrfs_trans_handle *trans) | |
174 | { | |
175 | struct btrfs_delayed_ref_root *delayed_refs; | |
176 | ||
177 | delayed_refs = &trans->transaction->delayed_refs; | |
178 | WARN_ON(!delayed_refs->qgroup_to_skip); | |
179 | delayed_refs->qgroup_to_skip = 0; | |
180 | } | |
181 | ||
3a45bb20 | 182 | int btrfs_end_transaction(struct btrfs_trans_handle *trans); |
79154b1b | 183 | struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, |
5aed1dd8 | 184 | unsigned int num_items); |
8eab77ff FM |
185 | struct btrfs_trans_handle *btrfs_start_transaction_fallback_global_rsv( |
186 | struct btrfs_root *root, | |
187 | unsigned int num_items, | |
188 | int min_factor); | |
08e007d2 | 189 | struct btrfs_trans_handle *btrfs_start_transaction_lflush( |
5aed1dd8 AM |
190 | struct btrfs_root *root, |
191 | unsigned int num_items); | |
7a7eaa40 JB |
192 | struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root); |
193 | struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root); | |
354aa0fb | 194 | struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root); |
d4edf39b MX |
195 | struct btrfs_trans_handle *btrfs_attach_transaction_barrier( |
196 | struct btrfs_root *root); | |
7a7eaa40 | 197 | struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root); |
2ff7e61e | 198 | int btrfs_wait_for_commit(struct btrfs_fs_info *fs_info, u64 transid); |
08607c1b | 199 | |
cfad392b | 200 | void btrfs_add_dead_root(struct btrfs_root *root); |
de78b51a | 201 | int btrfs_defrag_root(struct btrfs_root *root); |
9d1a2a3a | 202 | int btrfs_clean_one_deleted_snapshot(struct btrfs_root *root); |
3a45bb20 | 203 | int btrfs_commit_transaction(struct btrfs_trans_handle *trans); |
bb9c12c9 | 204 | int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, |
bb9c12c9 | 205 | int wait_for_unblock); |
3a45bb20 JM |
206 | int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans); |
207 | int btrfs_should_end_transaction(struct btrfs_trans_handle *trans); | |
2ff7e61e | 208 | void btrfs_throttle(struct btrfs_fs_info *fs_info); |
5d4f98a2 YZ |
209 | int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans, |
210 | struct btrfs_root *root); | |
2ff7e61e | 211 | int btrfs_write_marked_extents(struct btrfs_fs_info *fs_info, |
8cef4e16 | 212 | struct extent_io_tree *dirty_pages, int mark); |
bf89d38f JM |
213 | int btrfs_wait_extents(struct btrfs_fs_info *fs_info, |
214 | struct extent_io_tree *dirty_pages); | |
215 | int btrfs_wait_tree_log_extents(struct btrfs_root *root, int mark); | |
8929ecfa | 216 | int btrfs_transaction_blocked(struct btrfs_fs_info *info); |
f36f3042 | 217 | int btrfs_transaction_in_commit(struct btrfs_fs_info *info); |
724e2315 | 218 | void btrfs_put_transaction(struct btrfs_transaction *transaction); |
572d9ab7 | 219 | void btrfs_apply_pending_changes(struct btrfs_fs_info *fs_info); |
2b9dbef2 JB |
220 | void btrfs_add_dropped_root(struct btrfs_trans_handle *trans, |
221 | struct btrfs_root *root); | |
e089f05c | 222 | #endif |