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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__ | |
31f3c99b | 21 | #include "btrfs_inode.h" |
56bec294 | 22 | #include "delayed-ref.h" |
bed92eae | 23 | #include "ctree.h" |
e089f05c | 24 | |
4a9d8bde MX |
25 | enum 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 | ||
3204d33c JB |
35 | #define BTRFS_TRANS_HAVE_FREE_BGS 0 |
36 | #define BTRFS_TRANS_DIRTY_BG_RUN 1 | |
2968b1f4 | 37 | #define BTRFS_TRANS_CACHE_ENOSPC 2 |
3204d33c | 38 | |
79154b1b CM |
39 | struct btrfs_transaction { |
40 | u64 transid; | |
0860adfd MX |
41 | /* |
42 | * 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; | |
b7ec40d7 CM |
47 | /* |
48 | * total writers in this transaction, it must be zero before the | |
49 | * transaction can end | |
50 | */ | |
13c5a93e | 51 | atomic_t num_writers; |
a4abeea4 | 52 | atomic_t use_count; |
161c3549 | 53 | atomic_t pending_ordered; |
b7ec40d7 | 54 | |
3204d33c | 55 | unsigned long flags; |
13212b54 | 56 | |
4a9d8bde MX |
57 | /* Be protected by fs_info->trans_lock when we want to change it. */ |
58 | enum btrfs_trans_state state; | |
8fd17795 | 59 | struct list_head list; |
d1310b2e | 60 | struct extent_io_tree dirty_pages; |
08607c1b | 61 | unsigned long start_time; |
79154b1b CM |
62 | wait_queue_head_t writer_wait; |
63 | wait_queue_head_t commit_wait; | |
161c3549 | 64 | wait_queue_head_t pending_wait; |
3063d29f | 65 | struct list_head pending_snapshots; |
6df9a95e | 66 | struct list_head pending_chunks; |
9e351cc8 | 67 | struct list_head switch_commits; |
ce93ec54 | 68 | struct list_head dirty_bgs; |
1bbc621e | 69 | struct list_head io_bgs; |
2b9dbef2 | 70 | struct list_head dropped_roots; |
cb723e49 | 71 | u64 num_dirty_bgs; |
1bbc621e CM |
72 | |
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; | |
ce93ec54 | 79 | spinlock_t dirty_bgs_lock; |
348a0013 | 80 | /* Protected by spin lock fs_info->unused_bgs_lock. */ |
e33e17ee | 81 | struct list_head deleted_bgs; |
2b9dbef2 | 82 | spinlock_t dropped_roots_lock; |
56bec294 | 83 | struct btrfs_delayed_ref_root delayed_refs; |
49b25e05 | 84 | int aborted; |
79154b1b CM |
85 | }; |
86 | ||
0860adfd MX |
87 | #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) | |
faa2dbf0 | 94 | #define __TRANS_DUMMY (1U << 13) |
0860adfd MX |
95 | |
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) | |
a698d075 | 104 | |
2755a0de | 105 | #define BTRFS_SEND_TRANS_STUB ((void *)1) |
a26e8c9f | 106 | |
e089f05c CM |
107 | struct btrfs_trans_handle { |
108 | u64 transid; | |
f0486c68 | 109 | u64 bytes_reserved; |
4fbcdf66 | 110 | u64 chunk_bytes_reserved; |
2a1eb461 | 111 | unsigned long use_count; |
e089f05c CM |
112 | unsigned long blocks_reserved; |
113 | unsigned long blocks_used; | |
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; |
a698d075 MX |
118 | short aborted; |
119 | short adding_csums; | |
c6b305a8 | 120 | bool allocating_chunk; |
d9a0540a | 121 | bool can_flush_pending_bgs; |
20dd2cbf | 122 | bool reloc_reserved; |
5039eddc | 123 | bool sync; |
0860adfd | 124 | unsigned int type; |
d13603ef AJ |
125 | /* |
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; | |
bed92eae AJ |
131 | struct seq_list delayed_ref_elem; |
132 | struct list_head qgroup_ref_list; | |
ea658bad | 133 | struct list_head new_bgs; |
e089f05c CM |
134 | }; |
135 | ||
3063d29f | 136 | struct btrfs_pending_snapshot { |
3de4586c | 137 | struct dentry *dentry; |
e9662f70 | 138 | struct inode *dir; |
3063d29f | 139 | struct btrfs_root *root; |
b0c0ea63 | 140 | struct btrfs_root_item *root_item; |
a22285a6 | 141 | struct btrfs_root *snap; |
6f72c7e2 | 142 | struct btrfs_qgroup_inherit *inherit; |
8546b570 | 143 | struct btrfs_path *path; |
a22285a6 YZ |
144 | /* block reservation for the operation */ |
145 | struct btrfs_block_rsv block_rsv; | |
d5c12070 | 146 | u64 qgroup_reserved; |
a22285a6 YZ |
147 | /* extra metadata reseration for relocation */ |
148 | int error; | |
b83cc969 | 149 | bool readonly; |
3063d29f CM |
150 | struct list_head list; |
151 | }; | |
152 | ||
15ee9bc7 JB |
153 | static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans, |
154 | struct inode *inode) | |
155 | { | |
2f2ff0ee | 156 | spin_lock(&BTRFS_I(inode)->lock); |
15ee9bc7 | 157 | BTRFS_I(inode)->last_trans = trans->transaction->transid; |
257c62e1 | 158 | BTRFS_I(inode)->last_sub_trans = BTRFS_I(inode)->root->log_transid; |
46d8bc34 | 159 | BTRFS_I(inode)->last_log_commit = BTRFS_I(inode)->root->last_log_commit; |
2f2ff0ee | 160 | spin_unlock(&BTRFS_I(inode)->lock); |
15ee9bc7 JB |
161 | } |
162 | ||
9086db86 QW |
163 | /* |
164 | * Make qgroup codes to skip given qgroupid, means the old/new_roots for | |
165 | * qgroup won't contain the qgroupid in it. | |
166 | */ | |
167 | static inline void btrfs_set_skip_qgroup(struct btrfs_trans_handle *trans, | |
168 | u64 qgroupid) | |
169 | { | |
170 | struct btrfs_delayed_ref_root *delayed_refs; | |
171 | ||
172 | delayed_refs = &trans->transaction->delayed_refs; | |
173 | WARN_ON(delayed_refs->qgroup_to_skip); | |
174 | delayed_refs->qgroup_to_skip = qgroupid; | |
175 | } | |
176 | ||
177 | static inline void btrfs_clear_skip_qgroup(struct btrfs_trans_handle *trans) | |
178 | { | |
179 | struct btrfs_delayed_ref_root *delayed_refs; | |
180 | ||
181 | delayed_refs = &trans->transaction->delayed_refs; | |
182 | WARN_ON(!delayed_refs->qgroup_to_skip); | |
183 | delayed_refs->qgroup_to_skip = 0; | |
184 | } | |
185 | ||
79154b1b CM |
186 | int btrfs_end_transaction(struct btrfs_trans_handle *trans, |
187 | struct btrfs_root *root); | |
188 | struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, | |
5aed1dd8 | 189 | unsigned int num_items); |
8eab77ff FM |
190 | struct btrfs_trans_handle *btrfs_start_transaction_fallback_global_rsv( |
191 | struct btrfs_root *root, | |
192 | unsigned int num_items, | |
193 | int min_factor); | |
08e007d2 | 194 | struct btrfs_trans_handle *btrfs_start_transaction_lflush( |
5aed1dd8 AM |
195 | struct btrfs_root *root, |
196 | unsigned int num_items); | |
7a7eaa40 JB |
197 | struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root); |
198 | struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root); | |
354aa0fb | 199 | struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root); |
d4edf39b MX |
200 | struct btrfs_trans_handle *btrfs_attach_transaction_barrier( |
201 | struct btrfs_root *root); | |
7a7eaa40 | 202 | struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root); |
46204592 | 203 | int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid); |
08607c1b | 204 | |
cfad392b | 205 | void btrfs_add_dead_root(struct btrfs_root *root); |
de78b51a | 206 | int btrfs_defrag_root(struct btrfs_root *root); |
9d1a2a3a | 207 | int btrfs_clean_one_deleted_snapshot(struct btrfs_root *root); |
5f39d397 CM |
208 | int btrfs_commit_transaction(struct btrfs_trans_handle *trans, |
209 | struct btrfs_root *root); | |
bb9c12c9 SW |
210 | int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, |
211 | struct btrfs_root *root, | |
212 | int wait_for_unblock); | |
89ce8a63 CM |
213 | int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans, |
214 | struct btrfs_root *root); | |
8929ecfa YZ |
215 | int btrfs_should_end_transaction(struct btrfs_trans_handle *trans, |
216 | struct btrfs_root *root); | |
ab78c84d | 217 | void btrfs_throttle(struct btrfs_root *root); |
5d4f98a2 YZ |
218 | int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans, |
219 | struct btrfs_root *root); | |
690587d1 | 220 | int btrfs_write_marked_extents(struct btrfs_root *root, |
8cef4e16 | 221 | struct extent_io_tree *dirty_pages, int mark); |
690587d1 | 222 | int btrfs_wait_marked_extents(struct btrfs_root *root, |
8cef4e16 | 223 | struct extent_io_tree *dirty_pages, int mark); |
8929ecfa | 224 | int btrfs_transaction_blocked(struct btrfs_fs_info *info); |
f36f3042 | 225 | int btrfs_transaction_in_commit(struct btrfs_fs_info *info); |
724e2315 | 226 | void btrfs_put_transaction(struct btrfs_transaction *transaction); |
572d9ab7 | 227 | void btrfs_apply_pending_changes(struct btrfs_fs_info *fs_info); |
2b9dbef2 JB |
228 | void btrfs_add_dropped_root(struct btrfs_trans_handle *trans, |
229 | struct btrfs_root *root); | |
e089f05c | 230 | #endif |