Commit | Line | Data |
---|---|---|
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 | ||
79154b1b | 19 | #include <linux/fs.h> |
34088780 | 20 | #include <linux/sched.h> |
d3c2fdcf | 21 | #include <linux/writeback.h> |
5f39d397 | 22 | #include <linux/pagemap.h> |
79154b1b CM |
23 | #include "ctree.h" |
24 | #include "disk-io.h" | |
25 | #include "transaction.h" | |
26 | ||
78fae27e | 27 | static int total_trans = 0; |
2c90e5d6 CM |
28 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
29 | extern struct kmem_cache *btrfs_transaction_cachep; | |
30 | ||
08607c1b CM |
31 | static struct workqueue_struct *trans_wq; |
32 | ||
0f7d52f4 | 33 | #define BTRFS_ROOT_TRANS_TAG 0 |
6702ed49 | 34 | #define BTRFS_ROOT_DEFRAG_TAG 1 |
0f7d52f4 | 35 | |
79154b1b CM |
36 | static void put_transaction(struct btrfs_transaction *transaction) |
37 | { | |
2c90e5d6 | 38 | WARN_ON(transaction->use_count == 0); |
79154b1b | 39 | transaction->use_count--; |
78fae27e CM |
40 | if (transaction->use_count == 0) { |
41 | WARN_ON(total_trans == 0); | |
42 | total_trans--; | |
8fd17795 | 43 | list_del_init(&transaction->list); |
2c90e5d6 CM |
44 | memset(transaction, 0, sizeof(*transaction)); |
45 | kmem_cache_free(btrfs_transaction_cachep, transaction); | |
78fae27e | 46 | } |
79154b1b CM |
47 | } |
48 | ||
49 | static int join_transaction(struct btrfs_root *root) | |
50 | { | |
51 | struct btrfs_transaction *cur_trans; | |
52 | cur_trans = root->fs_info->running_transaction; | |
53 | if (!cur_trans) { | |
2c90e5d6 CM |
54 | cur_trans = kmem_cache_alloc(btrfs_transaction_cachep, |
55 | GFP_NOFS); | |
78fae27e | 56 | total_trans++; |
79154b1b | 57 | BUG_ON(!cur_trans); |
0f7d52f4 | 58 | root->fs_info->generation++; |
79154b1b | 59 | root->fs_info->running_transaction = cur_trans; |
15ee9bc7 JB |
60 | cur_trans->num_writers = 1; |
61 | cur_trans->num_joined = 0; | |
0f7d52f4 | 62 | cur_trans->transid = root->fs_info->generation; |
79154b1b CM |
63 | init_waitqueue_head(&cur_trans->writer_wait); |
64 | init_waitqueue_head(&cur_trans->commit_wait); | |
65 | cur_trans->in_commit = 0; | |
d5719762 | 66 | cur_trans->use_count = 1; |
79154b1b | 67 | cur_trans->commit_done = 0; |
08607c1b | 68 | cur_trans->start_time = get_seconds(); |
8fd17795 | 69 | list_add_tail(&cur_trans->list, &root->fs_info->trans_list); |
dc17ff8f | 70 | btrfs_ordered_inode_tree_init(&cur_trans->ordered_inode_tree); |
5f39d397 CM |
71 | extent_map_tree_init(&cur_trans->dirty_pages, |
72 | root->fs_info->btree_inode->i_mapping, | |
73 | GFP_NOFS); | |
15ee9bc7 JB |
74 | } else { |
75 | cur_trans->num_writers++; | |
76 | cur_trans->num_joined++; | |
79154b1b | 77 | } |
15ee9bc7 | 78 | |
79154b1b CM |
79 | return 0; |
80 | } | |
81 | ||
6702ed49 CM |
82 | static int record_root_in_trans(struct btrfs_root *root) |
83 | { | |
84 | u64 running_trans_id = root->fs_info->running_transaction->transid; | |
85 | if (root->ref_cows && root->last_trans < running_trans_id) { | |
86 | WARN_ON(root == root->fs_info->extent_root); | |
87 | if (root->root_item.refs != 0) { | |
88 | radix_tree_tag_set(&root->fs_info->fs_roots_radix, | |
89 | (unsigned long)root->root_key.objectid, | |
90 | BTRFS_ROOT_TRANS_TAG); | |
91 | radix_tree_tag_set(&root->fs_info->fs_roots_radix, | |
92 | (unsigned long)root->root_key.objectid, | |
93 | BTRFS_ROOT_DEFRAG_TAG); | |
94 | root->commit_root = root->node; | |
5f39d397 | 95 | extent_buffer_get(root->node); |
6702ed49 CM |
96 | } else { |
97 | WARN_ON(1); | |
98 | } | |
99 | root->last_trans = running_trans_id; | |
100 | } | |
101 | return 0; | |
102 | } | |
103 | ||
79154b1b CM |
104 | struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, |
105 | int num_blocks) | |
106 | { | |
2c90e5d6 CM |
107 | struct btrfs_trans_handle *h = |
108 | kmem_cache_alloc(btrfs_trans_handle_cachep, GFP_NOFS); | |
79154b1b CM |
109 | int ret; |
110 | ||
111 | mutex_lock(&root->fs_info->trans_mutex); | |
112 | ret = join_transaction(root); | |
113 | BUG_ON(ret); | |
0f7d52f4 | 114 | |
6702ed49 CM |
115 | record_root_in_trans(root); |
116 | h->transid = root->fs_info->running_transaction->transid; | |
79154b1b CM |
117 | h->transaction = root->fs_info->running_transaction; |
118 | h->blocks_reserved = num_blocks; | |
119 | h->blocks_used = 0; | |
31f3c99b | 120 | h->block_group = NULL; |
26b8003f CM |
121 | h->alloc_exclude_nr = 0; |
122 | h->alloc_exclude_start = 0; | |
79154b1b CM |
123 | root->fs_info->running_transaction->use_count++; |
124 | mutex_unlock(&root->fs_info->trans_mutex); | |
125 | return h; | |
126 | } | |
127 | ||
128 | int btrfs_end_transaction(struct btrfs_trans_handle *trans, | |
129 | struct btrfs_root *root) | |
130 | { | |
131 | struct btrfs_transaction *cur_trans; | |
d6e4a428 | 132 | |
79154b1b CM |
133 | mutex_lock(&root->fs_info->trans_mutex); |
134 | cur_trans = root->fs_info->running_transaction; | |
ccd467d6 | 135 | WARN_ON(cur_trans != trans->transaction); |
d5719762 | 136 | WARN_ON(cur_trans->num_writers < 1); |
ccd467d6 | 137 | cur_trans->num_writers--; |
79154b1b CM |
138 | if (waitqueue_active(&cur_trans->writer_wait)) |
139 | wake_up(&cur_trans->writer_wait); | |
79154b1b CM |
140 | put_transaction(cur_trans); |
141 | mutex_unlock(&root->fs_info->trans_mutex); | |
d6025579 | 142 | memset(trans, 0, sizeof(*trans)); |
2c90e5d6 | 143 | kmem_cache_free(btrfs_trans_handle_cachep, trans); |
79154b1b CM |
144 | return 0; |
145 | } | |
146 | ||
147 | ||
148 | int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans, | |
149 | struct btrfs_root *root) | |
150 | { | |
7c4452b9 | 151 | int ret; |
7c4452b9 CM |
152 | int err; |
153 | int werr = 0; | |
5f39d397 | 154 | struct extent_map_tree *dirty_pages; |
7c4452b9 | 155 | struct page *page; |
7c4452b9 | 156 | struct inode *btree_inode = root->fs_info->btree_inode; |
5f39d397 CM |
157 | u64 start; |
158 | u64 end; | |
159 | unsigned long index; | |
7c4452b9 CM |
160 | |
161 | if (!trans || !trans->transaction) { | |
162 | return filemap_write_and_wait(btree_inode->i_mapping); | |
163 | } | |
164 | dirty_pages = &trans->transaction->dirty_pages; | |
165 | while(1) { | |
5f39d397 CM |
166 | ret = find_first_extent_bit(dirty_pages, 0, &start, &end, |
167 | EXTENT_DIRTY); | |
168 | if (ret) | |
7c4452b9 | 169 | break; |
5f39d397 CM |
170 | clear_extent_dirty(dirty_pages, start, end, GFP_NOFS); |
171 | while(start <= end) { | |
172 | index = start >> PAGE_CACHE_SHIFT; | |
35ebb934 | 173 | start = (u64)(index + 1) << PAGE_CACHE_SHIFT; |
5f39d397 | 174 | page = find_lock_page(btree_inode->i_mapping, index); |
7c4452b9 CM |
175 | if (!page) |
176 | continue; | |
6702ed49 CM |
177 | if (PageWriteback(page)) { |
178 | if (PageDirty(page)) | |
179 | wait_on_page_writeback(page); | |
180 | else { | |
181 | unlock_page(page); | |
182 | page_cache_release(page); | |
183 | continue; | |
184 | } | |
185 | } | |
7c4452b9 CM |
186 | err = write_one_page(page, 0); |
187 | if (err) | |
188 | werr = err; | |
189 | page_cache_release(page); | |
190 | } | |
191 | } | |
192 | err = filemap_fdatawait(btree_inode->i_mapping); | |
193 | if (err) | |
194 | werr = err; | |
195 | return werr; | |
79154b1b CM |
196 | } |
197 | ||
198 | int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans, | |
199 | struct btrfs_root *root) | |
200 | { | |
201 | int ret; | |
202 | u64 old_extent_block; | |
203 | struct btrfs_fs_info *fs_info = root->fs_info; | |
204 | struct btrfs_root *tree_root = fs_info->tree_root; | |
205 | struct btrfs_root *extent_root = fs_info->extent_root; | |
79154b1b | 206 | |
9078a3e1 | 207 | btrfs_write_dirty_block_groups(trans, extent_root); |
79154b1b | 208 | while(1) { |
db94535d CM |
209 | old_extent_block = btrfs_root_bytenr(&extent_root->root_item); |
210 | if (old_extent_block == extent_root->node->start) | |
79154b1b | 211 | break; |
db94535d CM |
212 | btrfs_set_root_bytenr(&extent_root->root_item, |
213 | extent_root->node->start); | |
214 | btrfs_set_root_level(&extent_root->root_item, | |
215 | btrfs_header_level(extent_root->node)); | |
79154b1b CM |
216 | ret = btrfs_update_root(trans, tree_root, |
217 | &extent_root->root_key, | |
218 | &extent_root->root_item); | |
219 | BUG_ON(ret); | |
9078a3e1 | 220 | btrfs_write_dirty_block_groups(trans, extent_root); |
79154b1b CM |
221 | } |
222 | return 0; | |
223 | } | |
224 | ||
225 | static int wait_for_commit(struct btrfs_root *root, | |
226 | struct btrfs_transaction *commit) | |
227 | { | |
228 | DEFINE_WAIT(wait); | |
ccd467d6 | 229 | mutex_lock(&root->fs_info->trans_mutex); |
79154b1b CM |
230 | while(!commit->commit_done) { |
231 | prepare_to_wait(&commit->commit_wait, &wait, | |
232 | TASK_UNINTERRUPTIBLE); | |
233 | if (commit->commit_done) | |
234 | break; | |
235 | mutex_unlock(&root->fs_info->trans_mutex); | |
236 | schedule(); | |
237 | mutex_lock(&root->fs_info->trans_mutex); | |
238 | } | |
ccd467d6 | 239 | mutex_unlock(&root->fs_info->trans_mutex); |
79154b1b CM |
240 | finish_wait(&commit->commit_wait, &wait); |
241 | return 0; | |
242 | } | |
243 | ||
0f7d52f4 CM |
244 | struct dirty_root { |
245 | struct list_head list; | |
0f7d52f4 | 246 | struct btrfs_root *root; |
58176a96 | 247 | struct btrfs_root *latest_root; |
0f7d52f4 CM |
248 | }; |
249 | ||
5ce14bbc CM |
250 | int btrfs_add_dead_root(struct btrfs_root *root, |
251 | struct btrfs_root *latest, | |
252 | struct list_head *dead_list) | |
5eda7b5e CM |
253 | { |
254 | struct dirty_root *dirty; | |
255 | ||
256 | dirty = kmalloc(sizeof(*dirty), GFP_NOFS); | |
257 | if (!dirty) | |
258 | return -ENOMEM; | |
5eda7b5e | 259 | dirty->root = root; |
5ce14bbc | 260 | dirty->latest_root = latest; |
5eda7b5e CM |
261 | list_add(&dirty->list, dead_list); |
262 | return 0; | |
263 | } | |
264 | ||
35b7e476 CM |
265 | static int add_dirty_roots(struct btrfs_trans_handle *trans, |
266 | struct radix_tree_root *radix, | |
267 | struct list_head *list) | |
0f7d52f4 CM |
268 | { |
269 | struct dirty_root *dirty; | |
270 | struct btrfs_root *gang[8]; | |
271 | struct btrfs_root *root; | |
272 | int i; | |
273 | int ret; | |
54aa1f4d | 274 | int err = 0; |
5eda7b5e | 275 | u32 refs; |
54aa1f4d | 276 | |
0f7d52f4 CM |
277 | while(1) { |
278 | ret = radix_tree_gang_lookup_tag(radix, (void **)gang, 0, | |
279 | ARRAY_SIZE(gang), | |
280 | BTRFS_ROOT_TRANS_TAG); | |
281 | if (ret == 0) | |
282 | break; | |
283 | for (i = 0; i < ret; i++) { | |
284 | root = gang[i]; | |
2619ba1f CM |
285 | radix_tree_tag_clear(radix, |
286 | (unsigned long)root->root_key.objectid, | |
287 | BTRFS_ROOT_TRANS_TAG); | |
0f7d52f4 | 288 | if (root->commit_root == root->node) { |
db94535d CM |
289 | WARN_ON(root->node->start != |
290 | btrfs_root_bytenr(&root->root_item)); | |
5f39d397 | 291 | free_extent_buffer(root->commit_root); |
0f7d52f4 | 292 | root->commit_root = NULL; |
58176a96 JB |
293 | |
294 | /* make sure to update the root on disk | |
295 | * so we get any updates to the block used | |
296 | * counts | |
297 | */ | |
298 | err = btrfs_update_root(trans, | |
299 | root->fs_info->tree_root, | |
300 | &root->root_key, | |
301 | &root->root_item); | |
0f7d52f4 CM |
302 | continue; |
303 | } | |
304 | dirty = kmalloc(sizeof(*dirty), GFP_NOFS); | |
305 | BUG_ON(!dirty); | |
9f3a7427 CM |
306 | dirty->root = kmalloc(sizeof(*dirty->root), GFP_NOFS); |
307 | BUG_ON(!dirty->root); | |
308 | ||
309 | memset(&root->root_item.drop_progress, 0, | |
310 | sizeof(struct btrfs_disk_key)); | |
311 | root->root_item.drop_level = 0; | |
312 | ||
313 | memcpy(dirty->root, root, sizeof(*root)); | |
314 | dirty->root->node = root->commit_root; | |
58176a96 | 315 | dirty->latest_root = root; |
0f7d52f4 | 316 | root->commit_root = NULL; |
5eda7b5e | 317 | |
0f7d52f4 | 318 | root->root_key.offset = root->fs_info->generation; |
db94535d CM |
319 | btrfs_set_root_bytenr(&root->root_item, |
320 | root->node->start); | |
321 | btrfs_set_root_level(&root->root_item, | |
322 | btrfs_header_level(root->node)); | |
0f7d52f4 CM |
323 | err = btrfs_insert_root(trans, root->fs_info->tree_root, |
324 | &root->root_key, | |
325 | &root->root_item); | |
54aa1f4d CM |
326 | if (err) |
327 | break; | |
9f3a7427 CM |
328 | |
329 | refs = btrfs_root_refs(&dirty->root->root_item); | |
330 | btrfs_set_root_refs(&dirty->root->root_item, refs - 1); | |
5eda7b5e | 331 | err = btrfs_update_root(trans, root->fs_info->tree_root, |
9f3a7427 CM |
332 | &dirty->root->root_key, |
333 | &dirty->root->root_item); | |
5eda7b5e CM |
334 | |
335 | BUG_ON(err); | |
9f3a7427 | 336 | if (refs == 1) { |
5eda7b5e | 337 | list_add(&dirty->list, list); |
9f3a7427 CM |
338 | } else { |
339 | WARN_ON(1); | |
340 | kfree(dirty->root); | |
5eda7b5e | 341 | kfree(dirty); |
9f3a7427 | 342 | } |
0f7d52f4 CM |
343 | } |
344 | } | |
54aa1f4d | 345 | return err; |
0f7d52f4 CM |
346 | } |
347 | ||
e9d0b13b CM |
348 | int btrfs_defrag_root(struct btrfs_root *root, int cacheonly) |
349 | { | |
350 | struct btrfs_fs_info *info = root->fs_info; | |
351 | int ret; | |
352 | struct btrfs_trans_handle *trans; | |
d3c2fdcf | 353 | unsigned long nr; |
e9d0b13b CM |
354 | |
355 | if (root->defrag_running) | |
356 | return 0; | |
e9d0b13b | 357 | trans = btrfs_start_transaction(root, 1); |
6b80053d | 358 | while (1) { |
e9d0b13b CM |
359 | root->defrag_running = 1; |
360 | ret = btrfs_defrag_leaves(trans, root, cacheonly); | |
d3c2fdcf | 361 | nr = trans->blocks_used; |
e9d0b13b CM |
362 | btrfs_end_transaction(trans, root); |
363 | mutex_unlock(&info->fs_mutex); | |
d3c2fdcf | 364 | btrfs_btree_balance_dirty(info->tree_root, nr); |
e9d0b13b CM |
365 | cond_resched(); |
366 | ||
367 | mutex_lock(&info->fs_mutex); | |
368 | trans = btrfs_start_transaction(root, 1); | |
369 | if (ret != -EAGAIN) | |
370 | break; | |
371 | } | |
372 | root->defrag_running = 0; | |
373 | radix_tree_tag_clear(&info->fs_roots_radix, | |
374 | (unsigned long)root->root_key.objectid, | |
375 | BTRFS_ROOT_DEFRAG_TAG); | |
376 | btrfs_end_transaction(trans, root); | |
377 | return 0; | |
378 | } | |
379 | ||
6702ed49 CM |
380 | int btrfs_defrag_dirty_roots(struct btrfs_fs_info *info) |
381 | { | |
382 | struct btrfs_root *gang[1]; | |
383 | struct btrfs_root *root; | |
6702ed49 CM |
384 | int i; |
385 | int ret; | |
386 | int err = 0; | |
387 | u64 last = 0; | |
388 | ||
6702ed49 CM |
389 | while(1) { |
390 | ret = radix_tree_gang_lookup_tag(&info->fs_roots_radix, | |
391 | (void **)gang, last, | |
392 | ARRAY_SIZE(gang), | |
393 | BTRFS_ROOT_DEFRAG_TAG); | |
394 | if (ret == 0) | |
395 | break; | |
396 | for (i = 0; i < ret; i++) { | |
397 | root = gang[i]; | |
398 | last = root->root_key.objectid + 1; | |
f510cfec | 399 | btrfs_defrag_root(root, 1); |
6702ed49 CM |
400 | } |
401 | } | |
6b80053d | 402 | btrfs_defrag_root(info->extent_root, 1); |
6702ed49 CM |
403 | return err; |
404 | } | |
405 | ||
35b7e476 CM |
406 | static int drop_dirty_roots(struct btrfs_root *tree_root, |
407 | struct list_head *list) | |
0f7d52f4 CM |
408 | { |
409 | struct dirty_root *dirty; | |
410 | struct btrfs_trans_handle *trans; | |
d3c2fdcf | 411 | unsigned long nr; |
db94535d CM |
412 | u64 num_bytes; |
413 | u64 bytes_used; | |
54aa1f4d | 414 | int ret = 0; |
9f3a7427 CM |
415 | int err; |
416 | ||
0f7d52f4 | 417 | while(!list_empty(list)) { |
58176a96 JB |
418 | struct btrfs_root *root; |
419 | ||
facda1e7 | 420 | mutex_lock(&tree_root->fs_info->fs_mutex); |
0f7d52f4 CM |
421 | dirty = list_entry(list->next, struct dirty_root, list); |
422 | list_del_init(&dirty->list); | |
5eda7b5e | 423 | |
db94535d | 424 | num_bytes = btrfs_root_used(&dirty->root->root_item); |
58176a96 JB |
425 | root = dirty->latest_root; |
426 | ||
9f3a7427 CM |
427 | while(1) { |
428 | trans = btrfs_start_transaction(tree_root, 1); | |
429 | ret = btrfs_drop_snapshot(trans, dirty->root); | |
430 | if (ret != -EAGAIN) { | |
431 | break; | |
432 | } | |
58176a96 | 433 | |
9f3a7427 CM |
434 | err = btrfs_update_root(trans, |
435 | tree_root, | |
436 | &dirty->root->root_key, | |
437 | &dirty->root->root_item); | |
438 | if (err) | |
439 | ret = err; | |
d3c2fdcf | 440 | nr = trans->blocks_used; |
9f3a7427 CM |
441 | ret = btrfs_end_transaction(trans, tree_root); |
442 | BUG_ON(ret); | |
f4468e94 | 443 | mutex_unlock(&tree_root->fs_info->fs_mutex); |
d3c2fdcf | 444 | btrfs_btree_balance_dirty(tree_root, nr); |
4dc11904 | 445 | cond_resched(); |
f4468e94 | 446 | mutex_lock(&tree_root->fs_info->fs_mutex); |
9f3a7427 | 447 | } |
0f7d52f4 | 448 | BUG_ON(ret); |
58176a96 | 449 | |
db94535d CM |
450 | num_bytes -= btrfs_root_used(&dirty->root->root_item); |
451 | bytes_used = btrfs_root_used(&root->root_item); | |
452 | if (num_bytes) { | |
58176a96 | 453 | record_root_in_trans(root); |
5f39d397 | 454 | btrfs_set_root_used(&root->root_item, |
db94535d | 455 | bytes_used - num_bytes); |
58176a96 | 456 | } |
9f3a7427 | 457 | ret = btrfs_del_root(trans, tree_root, &dirty->root->root_key); |
58176a96 JB |
458 | if (ret) { |
459 | BUG(); | |
54aa1f4d | 460 | break; |
58176a96 | 461 | } |
d3c2fdcf | 462 | nr = trans->blocks_used; |
0f7d52f4 CM |
463 | ret = btrfs_end_transaction(trans, tree_root); |
464 | BUG_ON(ret); | |
5eda7b5e | 465 | |
f510cfec | 466 | free_extent_buffer(dirty->root->node); |
9f3a7427 | 467 | kfree(dirty->root); |
0f7d52f4 | 468 | kfree(dirty); |
facda1e7 | 469 | mutex_unlock(&tree_root->fs_info->fs_mutex); |
d3c2fdcf CM |
470 | |
471 | btrfs_btree_balance_dirty(tree_root, nr); | |
4dc11904 | 472 | cond_resched(); |
0f7d52f4 | 473 | } |
54aa1f4d | 474 | return ret; |
0f7d52f4 CM |
475 | } |
476 | ||
dc17ff8f CM |
477 | int btrfs_write_ordered_inodes(struct btrfs_trans_handle *trans, |
478 | struct btrfs_root *root) | |
479 | { | |
480 | struct btrfs_transaction *cur_trans = trans->transaction; | |
481 | struct inode *inode; | |
482 | u64 root_objectid = 0; | |
483 | u64 objectid = 0; | |
484 | u64 transid = trans->transid; | |
485 | int ret; | |
486 | ||
487 | printk("write ordered trans %Lu\n", transid); | |
488 | while(1) { | |
489 | ret = btrfs_find_first_ordered_inode( | |
490 | &cur_trans->ordered_inode_tree, | |
491 | &root_objectid, &objectid); | |
492 | if (!ret) | |
493 | break; | |
494 | ||
495 | mutex_unlock(&root->fs_info->trans_mutex); | |
496 | mutex_unlock(&root->fs_info->fs_mutex); | |
497 | inode = btrfs_ilookup(root->fs_info->sb, objectid, | |
498 | root_objectid); | |
499 | if (inode) { | |
500 | if (S_ISREG(inode->i_mode)) | |
501 | filemap_fdatawrite(inode->i_mapping); | |
502 | iput(inode); | |
503 | } | |
504 | mutex_lock(&root->fs_info->fs_mutex); | |
505 | mutex_lock(&root->fs_info->trans_mutex); | |
506 | } | |
507 | while(1) { | |
508 | root_objectid = 0; | |
509 | objectid = 0; | |
510 | ret = btrfs_find_del_first_ordered_inode( | |
511 | &cur_trans->ordered_inode_tree, | |
512 | &root_objectid, &objectid); | |
513 | if (!ret) | |
514 | break; | |
515 | mutex_unlock(&root->fs_info->trans_mutex); | |
516 | mutex_unlock(&root->fs_info->fs_mutex); | |
517 | inode = btrfs_ilookup(root->fs_info->sb, objectid, | |
518 | root_objectid); | |
519 | if (inode) { | |
520 | if (S_ISREG(inode->i_mode)) | |
521 | filemap_write_and_wait(inode->i_mapping); | |
522 | iput(inode); | |
523 | } | |
524 | mutex_lock(&root->fs_info->fs_mutex); | |
525 | mutex_lock(&root->fs_info->trans_mutex); | |
526 | } | |
527 | printk("done write ordered trans %Lu\n", transid); | |
528 | return 0; | |
529 | } | |
530 | ||
79154b1b CM |
531 | int btrfs_commit_transaction(struct btrfs_trans_handle *trans, |
532 | struct btrfs_root *root) | |
533 | { | |
15ee9bc7 JB |
534 | unsigned long joined = 0; |
535 | unsigned long timeout = 1; | |
79154b1b | 536 | struct btrfs_transaction *cur_trans; |
8fd17795 | 537 | struct btrfs_transaction *prev_trans = NULL; |
0f7d52f4 | 538 | struct list_head dirty_fs_roots; |
4313b399 | 539 | struct extent_map_tree *pinned_copy; |
79154b1b | 540 | DEFINE_WAIT(wait); |
15ee9bc7 | 541 | int ret; |
79154b1b | 542 | |
0f7d52f4 | 543 | INIT_LIST_HEAD(&dirty_fs_roots); |
d6e4a428 | 544 | |
79154b1b CM |
545 | mutex_lock(&root->fs_info->trans_mutex); |
546 | if (trans->transaction->in_commit) { | |
547 | cur_trans = trans->transaction; | |
548 | trans->transaction->use_count++; | |
ccd467d6 | 549 | mutex_unlock(&root->fs_info->trans_mutex); |
79154b1b | 550 | btrfs_end_transaction(trans, root); |
ccd467d6 CM |
551 | |
552 | mutex_unlock(&root->fs_info->fs_mutex); | |
79154b1b CM |
553 | ret = wait_for_commit(root, cur_trans); |
554 | BUG_ON(ret); | |
15ee9bc7 JB |
555 | |
556 | mutex_lock(&root->fs_info->trans_mutex); | |
79154b1b | 557 | put_transaction(cur_trans); |
15ee9bc7 JB |
558 | mutex_unlock(&root->fs_info->trans_mutex); |
559 | ||
ccd467d6 | 560 | mutex_lock(&root->fs_info->fs_mutex); |
79154b1b CM |
561 | return 0; |
562 | } | |
4313b399 CM |
563 | |
564 | pinned_copy = kmalloc(sizeof(*pinned_copy), GFP_NOFS); | |
565 | if (!pinned_copy) | |
566 | return -ENOMEM; | |
567 | ||
568 | extent_map_tree_init(pinned_copy, | |
569 | root->fs_info->btree_inode->i_mapping, GFP_NOFS); | |
570 | ||
2c90e5d6 | 571 | trans->transaction->in_commit = 1; |
ccd467d6 CM |
572 | cur_trans = trans->transaction; |
573 | if (cur_trans->list.prev != &root->fs_info->trans_list) { | |
574 | prev_trans = list_entry(cur_trans->list.prev, | |
575 | struct btrfs_transaction, list); | |
576 | if (!prev_trans->commit_done) { | |
577 | prev_trans->use_count++; | |
578 | mutex_unlock(&root->fs_info->fs_mutex); | |
579 | mutex_unlock(&root->fs_info->trans_mutex); | |
580 | ||
581 | wait_for_commit(root, prev_trans); | |
ccd467d6 CM |
582 | |
583 | mutex_lock(&root->fs_info->fs_mutex); | |
584 | mutex_lock(&root->fs_info->trans_mutex); | |
15ee9bc7 | 585 | put_transaction(prev_trans); |
ccd467d6 CM |
586 | } |
587 | } | |
15ee9bc7 JB |
588 | |
589 | do { | |
590 | joined = cur_trans->num_joined; | |
2c90e5d6 | 591 | WARN_ON(cur_trans != trans->transaction); |
15ee9bc7 | 592 | prepare_to_wait(&cur_trans->writer_wait, &wait, |
79154b1b | 593 | TASK_UNINTERRUPTIBLE); |
15ee9bc7 JB |
594 | |
595 | if (cur_trans->num_writers > 1) | |
596 | timeout = MAX_SCHEDULE_TIMEOUT; | |
597 | else | |
598 | timeout = 1; | |
599 | ||
ccd467d6 | 600 | mutex_unlock(&root->fs_info->fs_mutex); |
79154b1b | 601 | mutex_unlock(&root->fs_info->trans_mutex); |
15ee9bc7 JB |
602 | |
603 | schedule_timeout(timeout); | |
604 | ||
ccd467d6 | 605 | mutex_lock(&root->fs_info->fs_mutex); |
79154b1b | 606 | mutex_lock(&root->fs_info->trans_mutex); |
15ee9bc7 | 607 | finish_wait(&cur_trans->writer_wait, &wait); |
dc17ff8f CM |
608 | ret = btrfs_write_ordered_inodes(trans, root); |
609 | ||
15ee9bc7 JB |
610 | } while (cur_trans->num_writers > 1 || |
611 | (cur_trans->num_joined != joined)); | |
612 | ||
2c90e5d6 | 613 | WARN_ON(cur_trans != trans->transaction); |
dc17ff8f | 614 | |
54aa1f4d CM |
615 | ret = add_dirty_roots(trans, &root->fs_info->fs_roots_radix, |
616 | &dirty_fs_roots); | |
617 | BUG_ON(ret); | |
618 | ||
79154b1b CM |
619 | ret = btrfs_commit_tree_roots(trans, root); |
620 | BUG_ON(ret); | |
54aa1f4d | 621 | |
78fae27e CM |
622 | cur_trans = root->fs_info->running_transaction; |
623 | root->fs_info->running_transaction = NULL; | |
4b52dff6 CM |
624 | btrfs_set_super_generation(&root->fs_info->super_copy, |
625 | cur_trans->transid); | |
626 | btrfs_set_super_root(&root->fs_info->super_copy, | |
db94535d CM |
627 | root->fs_info->tree_root->node->start); |
628 | btrfs_set_super_root_level(&root->fs_info->super_copy, | |
629 | btrfs_header_level(root->fs_info->tree_root->node)); | |
5f39d397 CM |
630 | |
631 | write_extent_buffer(root->fs_info->sb_buffer, | |
632 | &root->fs_info->super_copy, 0, | |
633 | sizeof(root->fs_info->super_copy)); | |
ccd467d6 | 634 | |
4313b399 | 635 | btrfs_copy_pinned(root, pinned_copy); |
ccd467d6 | 636 | |
78fae27e | 637 | mutex_unlock(&root->fs_info->trans_mutex); |
8fd17795 | 638 | mutex_unlock(&root->fs_info->fs_mutex); |
79154b1b CM |
639 | ret = btrfs_write_and_wait_transaction(trans, root); |
640 | BUG_ON(ret); | |
79154b1b | 641 | write_ctree_super(trans, root); |
4313b399 | 642 | |
8fd17795 | 643 | mutex_lock(&root->fs_info->fs_mutex); |
4313b399 | 644 | btrfs_finish_extent_commit(trans, root, pinned_copy); |
78fae27e | 645 | mutex_lock(&root->fs_info->trans_mutex); |
4313b399 CM |
646 | |
647 | kfree(pinned_copy); | |
648 | ||
2c90e5d6 | 649 | cur_trans->commit_done = 1; |
15ee9bc7 | 650 | root->fs_info->last_trans_committed = cur_trans->transid; |
2c90e5d6 | 651 | wake_up(&cur_trans->commit_wait); |
78fae27e | 652 | put_transaction(cur_trans); |
79154b1b | 653 | put_transaction(cur_trans); |
58176a96 | 654 | |
facda1e7 CM |
655 | if (root->fs_info->closing) |
656 | list_splice_init(&root->fs_info->dead_roots, &dirty_fs_roots); | |
657 | else | |
658 | list_splice_init(&dirty_fs_roots, &root->fs_info->dead_roots); | |
58176a96 | 659 | |
78fae27e | 660 | mutex_unlock(&root->fs_info->trans_mutex); |
2c90e5d6 | 661 | kmem_cache_free(btrfs_trans_handle_cachep, trans); |
79154b1b | 662 | |
facda1e7 CM |
663 | if (root->fs_info->closing) { |
664 | mutex_unlock(&root->fs_info->fs_mutex); | |
665 | drop_dirty_roots(root->fs_info->tree_root, &dirty_fs_roots); | |
666 | mutex_lock(&root->fs_info->fs_mutex); | |
667 | } | |
79154b1b CM |
668 | return ret; |
669 | } | |
670 | ||
e9d0b13b CM |
671 | int btrfs_clean_old_snapshots(struct btrfs_root *root) |
672 | { | |
673 | struct list_head dirty_roots; | |
674 | INIT_LIST_HEAD(&dirty_roots); | |
675 | ||
676 | mutex_lock(&root->fs_info->trans_mutex); | |
677 | list_splice_init(&root->fs_info->dead_roots, &dirty_roots); | |
678 | mutex_unlock(&root->fs_info->trans_mutex); | |
679 | ||
680 | if (!list_empty(&dirty_roots)) { | |
681 | drop_dirty_roots(root, &dirty_roots); | |
682 | } | |
683 | return 0; | |
684 | } | |
6da6abae CM |
685 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) |
686 | void btrfs_transaction_cleaner(void *p) | |
687 | #else | |
08607c1b | 688 | void btrfs_transaction_cleaner(struct work_struct *work) |
6da6abae | 689 | #endif |
08607c1b | 690 | { |
6da6abae CM |
691 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) |
692 | struct btrfs_fs_info *fs_info = p; | |
693 | #else | |
08607c1b CM |
694 | struct btrfs_fs_info *fs_info = container_of(work, |
695 | struct btrfs_fs_info, | |
696 | trans_work.work); | |
697 | ||
6da6abae | 698 | #endif |
08607c1b CM |
699 | struct btrfs_root *root = fs_info->tree_root; |
700 | struct btrfs_transaction *cur; | |
701 | struct btrfs_trans_handle *trans; | |
702 | unsigned long now; | |
703 | unsigned long delay = HZ * 30; | |
704 | int ret; | |
705 | ||
08607c1b CM |
706 | mutex_lock(&root->fs_info->fs_mutex); |
707 | mutex_lock(&root->fs_info->trans_mutex); | |
708 | cur = root->fs_info->running_transaction; | |
709 | if (!cur) { | |
710 | mutex_unlock(&root->fs_info->trans_mutex); | |
711 | goto out; | |
712 | } | |
713 | now = get_seconds(); | |
714 | if (now < cur->start_time || now - cur->start_time < 30) { | |
715 | mutex_unlock(&root->fs_info->trans_mutex); | |
716 | delay = HZ * 5; | |
717 | goto out; | |
718 | } | |
719 | mutex_unlock(&root->fs_info->trans_mutex); | |
6702ed49 | 720 | btrfs_defrag_dirty_roots(root->fs_info); |
08607c1b CM |
721 | trans = btrfs_start_transaction(root, 1); |
722 | ret = btrfs_commit_transaction(trans, root); | |
723 | out: | |
724 | mutex_unlock(&root->fs_info->fs_mutex); | |
e9d0b13b | 725 | btrfs_clean_old_snapshots(root); |
08607c1b CM |
726 | btrfs_transaction_queue_work(root, delay); |
727 | } | |
728 | ||
729 | void btrfs_transaction_queue_work(struct btrfs_root *root, int delay) | |
730 | { | |
731 | queue_delayed_work(trans_wq, &root->fs_info->trans_work, delay); | |
732 | } | |
733 | ||
734 | void btrfs_transaction_flush_work(struct btrfs_root *root) | |
735 | { | |
736 | cancel_rearming_delayed_workqueue(trans_wq, &root->fs_info->trans_work); | |
737 | flush_workqueue(trans_wq); | |
738 | } | |
739 | ||
740 | void __init btrfs_init_transaction_sys(void) | |
741 | { | |
742 | trans_wq = create_workqueue("btrfs"); | |
743 | } | |
744 | ||
17636e03 | 745 | void btrfs_exit_transaction_sys(void) |
08607c1b CM |
746 | { |
747 | destroy_workqueue(trans_wq); | |
748 | } | |
749 |